* 'for-linus' of master.kernel.org:/pub/scm/linux/kernel/git/cooloney/blackfin-2.6:
Input Serio: Blackfin doesnt support I8042 - make sure it doesnt get selected
Blackfin arch: add BF54x I2C/TWI TWI0 driver support
Blackfin On-Chip RTC driver update for supporting BF54x
Blackfin Ethernet MAC driver: fix bug Report returned -ENOMEM upwards (in case L1/uncached memory alloc fails)
Blackfin arch: add error message when IRQ no available
Blackfin arch: Initialize the exception vectors early in the boot process
Blackfin arch: fix a compiling warning about dma-mapping
Blackfin arch: switch to using proper defines this time THREAD_SIZE and PAGE_SIZE instead of just PAGE_SIZE everywhere
Blackfin arch: fix bug which unaligns the init thread's stack and causes the current macro to fail.
Blackfin arch: Load P0 before storing through it
Blackfin arch: fix KGDB bug, dont forget last parameter.
Blackfin arch: add selections for BF544 and BF542
Blackfin arch: use bfin_read_SWRST() now that BF561 provides it
Blackfin arch: setup aliases for some core Core A MMRs
E: penberg@cs.helsinki.fi
W: http://www.cs.helsinki.fi/u/penberg/
D: Various kernel hacks, fixes, and cleanups.
+D: Slab allocators
S: Finland
N: David Engebretsen
N: Christoph Lameter
E: christoph@lameter.com
D: Digiboard PC/Xe and PC/Xi, Digiboard EPCA
-D: Early protocol filter for bridging code
-D: Bug fixes
+D: NUMA support, Slab allocators, Page migration
+D: Scalability, Time subsystem
N: Paul Laufer
E: paul@laufernet.com
<chapter id="splice">
<title>splice API</title>
- <para>)
+ <para>
splice is a method for moving blocks of data around inside the
- kernel, without continually transferring it between the kernel
+ kernel, without continually transferring them between the kernel
and user space.
</para>
!Iinclude/linux/splice.h
!Ffs/splice.c
</chapter>
+ <chapter id="pipes">
+ <title>pipes API</title>
+ <para>
+ Pipe interfaces are all for in-kernel (builtin image) use.
+ They are not exported for use by modules.
+ </para>
+!Iinclude/linux/pipe_fs_i.h
+!Ffs/pipe.c
+ </chapter>
</book>
used to indicate the whole sequence of performing barrier requests
including draining and flushing.
-typedef void (prepare_flush_fn)(request_queue_t *q, struct request *rq);
+typedef void (prepare_flush_fn)(struct request_queue *q, struct request *rq);
-int blk_queue_ordered(request_queue_t *q, unsigned ordered,
+int blk_queue_ordered(struct request_queue *q, unsigned ordered,
prepare_flush_fn *prepare_flush_fn);
@q : the queue in question
For example, SCSI disk driver's prepare_flush_fn looks like the
following.
-static void sd_prepare_flush(request_queue_t *q, struct request *rq)
+static void sd_prepare_flush(struct request_queue *q, struct request *rq)
{
memset(rq->cmd, 0, sizeof(rq->cmd));
rq->cmd_type = REQ_TYPE_BLOCK_PC;
queueing (typically known as tagged command queueing), ie manage more than
one outstanding command on a queue at any given time.
- blk_queue_init_tags(request_queue_t *q, int depth)
+ blk_queue_init_tags(struct request_queue *q, int depth)
Initialize internal command tagging structures for a maximum
depth of 'depth'.
- blk_queue_free_tags((request_queue_t *q)
+ blk_queue_free_tags((struct request_queue *q)
Teardown tag info associated with the queue. This will be done
automatically by block if blk_queue_cleanup() is called on a queue
The above are initialization and exit management, the main helpers during
normal operations are:
- blk_queue_start_tag(request_queue_t *q, struct request *rq)
+ blk_queue_start_tag(struct request_queue *q, struct request *rq)
Start tagged operation for this request. A free tag number between
0 and 'depth' is assigned to the request (rq->tag holds this number),
for this queue is already achieved (or if the tag wasn't started for
some other reason), 1 is returned. Otherwise 0 is returned.
- blk_queue_end_tag(request_queue_t *q, struct request *rq)
+ blk_queue_end_tag(struct request_queue *q, struct request *rq)
End tagged operation on this request. 'rq' is removed from the internal
book keeping structures.
the hardware and software block queue and enable the driver to sanely restart
all the outstanding requests. There's a third helper to do that:
- blk_queue_invalidate_tags(request_queue_t *q)
+ blk_queue_invalidate_tags(struct request_queue *q)
Clear the internal block tag queue and re-add all the pending requests
to the request queue. The driver will receive them again on the
struct bio *biotail DBI Last bio in request
-request_queue_t *q DB Request queue this request belongs to
+struct request_queue *q DB Request queue this request belongs to
struct request_list *rl B Request list this request came from
issues including wire-OR and output latencies.
The get/set calls have no error returns because "invalid GPIO" should have
-been reported earlier in gpio_set_direction(). However, note that not all
+been reported earlier from gpio_direction_*(). However, note that not all
platforms can read the value of output pins; those that can't should always
return zero. Also, using these calls for GPIOs that can't safely be accessed
without sleeping (see below) is an error.
Those return either the corresponding number in the other namespace, or
else a negative errno code if the mapping can't be done. (For example,
some GPIOs can't used as IRQs.) It is an unchecked error to use a GPIO
-number that hasn't been marked as an input using gpio_set_direction(), or
+number that wasn't set up as an input using gpio_direction_input(), or
to use an IRQ number that didn't originally come from gpio_to_irq().
These two mapping calls are expected to cost on the order of a single
measured from __make_request() to end_that_request_last()).
Field 9 -- # of I/Os currently in progress
The only field that should go to zero. Incremented as requests are
- given to appropriate request_queue_t and decremented as they finish.
+ given to appropriate struct request_queue and decremented as they finish.
Field 10 -- # of milliseconds spent doing I/Os
This field is increases so long as field 9 is nonzero.
Field 11 -- weighted # of milliseconds spent doing I/Os
parameter is applicable:
ACPI ACPI support is enabled.
+ AGP AGP (Accelerated Graphics Port) is enabled.
ALSA ALSA sound support is enabled.
APIC APIC support is enabled.
APM Advanced Power Management support is enabled.
to assume that this machine's pmtimer latches its value
and always returns good values.
+ agp= [AGP]
+ { off | try_unsupported }
+ off: disable AGP support
+ try_unsupported: try to drive unsupported chipsets
+ (may crash computer or cause data corruption)
+
enable_timer_pin_1 [i386,x86-64]
Enable PIN 1 of APIC timer
Can be useful to work around chipset bugs
include $(KBUILD_OUTPUT)/.config
LGUEST_GUEST_TOP := ($(CONFIG_PAGE_OFFSET) - 0x08000000)
-CFLAGS:=-Wall -Wmissing-declarations -Wmissing-prototypes -O3 \
- -static -DLGUEST_GUEST_TOP="$(LGUEST_GUEST_TOP)" -Wl,-T,lguest.lds
+CFLAGS:=-Wall -Wmissing-declarations -Wmissing-prototypes -O3 -Wl,-T,lguest.lds
LDLIBS:=-lz
all: lguest.lds lguest
--- /dev/null
+#! /bin/sh
+
+set -e
+
+PREFIX=$1
+shift
+
+trap 'rm -r $TMPDIR' 0
+TMPDIR=`mktemp -d`
+
+exec 3>/dev/null
+for f; do
+ while IFS="
+" read -r LINE; do
+ case "$LINE" in
+ *$PREFIX:[0-9]*:\**)
+ NUM=`echo "$LINE" | sed "s/.*$PREFIX:\([0-9]*\).*/\1/"`
+ if [ -f $TMPDIR/$NUM ]; then
+ echo "$TMPDIR/$NUM already exits prior to $f"
+ exit 1
+ fi
+ exec 3>>$TMPDIR/$NUM
+ echo $f | sed 's,\.\./,,g' > $TMPDIR/.$NUM
+ /bin/echo "$LINE" | sed -e "s/$PREFIX:[0-9]*//" -e "s/:\*/*/" >&3
+ ;;
+ *$PREFIX:[0-9]*)
+ NUM=`echo "$LINE" | sed "s/.*$PREFIX:\([0-9]*\).*/\1/"`
+ if [ -f $TMPDIR/$NUM ]; then
+ echo "$TMPDIR/$NUM already exits prior to $f"
+ exit 1
+ fi
+ exec 3>>$TMPDIR/$NUM
+ echo $f | sed 's,\.\./,,g' > $TMPDIR/.$NUM
+ /bin/echo "$LINE" | sed "s/$PREFIX:[0-9]*//" >&3
+ ;;
+ *:\**)
+ /bin/echo "$LINE" | sed -e "s/:\*/*/" -e "s,/\*\*/,," >&3
+ echo >&3
+ exec 3>/dev/null
+ ;;
+ *)
+ /bin/echo "$LINE" >&3
+ ;;
+ esac
+ done < $f
+ echo >&3
+ exec 3>/dev/null
+done
+
+LASTFILE=""
+for f in $TMPDIR/*; do
+ if [ "$LASTFILE" != $(cat $TMPDIR/.$(basename $f) ) ]; then
+ LASTFILE=$(cat $TMPDIR/.$(basename $f) )
+ echo "[ $LASTFILE ]"
+ fi
+ cat $f
+done
+
-/* Simple program to layout "physical" memory for new lguest guest.
- * Linked high to avoid likely physical memory. */
+/*P:100 This is the Launcher code, a simple program which lays out the
+ * "physical" memory for the new Guest by mapping the kernel image and the
+ * virtual devices, then reads repeatedly from /dev/lguest to run the Guest.
+ *
+ * The only trick: the Makefile links it at a high address so it will be clear
+ * of the guest memory region. It means that each Guest cannot have more than
+ * about 2.5G of memory on a normally configured Host. :*/
#define _LARGEFILE64_SOURCE
#define _GNU_SOURCE
#include <stdio.h>
#include <termios.h>
#include <getopt.h>
#include <zlib.h>
+/*L:110 We can ignore the 28 include files we need for this program, but I do
+ * want to draw attention to the use of kernel-style types.
+ *
+ * As Linus said, "C is a Spartan language, and so should your naming be." I
+ * like these abbreviations and the header we need uses them, so we define them
+ * here.
+ */
typedef unsigned long long u64;
typedef uint32_t u32;
typedef uint16_t u16;
typedef uint8_t u8;
#include "../../include/linux/lguest_launcher.h"
#include "../../include/asm-i386/e820.h"
+/*:*/
#define PAGE_PRESENT 0x7 /* Present, RW, Execute */
#define NET_PEERNUM 1
#define SIOCBRADDIF 0x89a2 /* add interface to bridge */
#endif
+/*L:120 verbose is both a global flag and a macro. The C preprocessor allows
+ * this, and although I wouldn't recommend it, it works quite nicely here. */
static bool verbose;
#define verbose(args...) \
do { if (verbose) printf(args); } while(0)
+/*:*/
+
+/* The pipe to send commands to the waker process */
static int waker_fd;
+/* The top of guest physical memory. */
+static u32 top;
+/* This is our list of devices. */
struct device_list
{
+ /* Summary information about the devices in our list: ready to pass to
+ * select() to ask which need servicing.*/
fd_set infds;
int max_infd;
+ /* The descriptor page for the devices. */
+ struct lguest_device_desc *descs;
+
+ /* A single linked list of devices. */
struct device *dev;
+ /* ... And an end pointer so we can easily append new devices */
struct device **lastdev;
};
+/* The device structure describes a single device. */
struct device
{
+ /* The linked-list pointer. */
struct device *next;
+ /* The descriptor for this device, as mapped into the Guest. */
struct lguest_device_desc *desc;
+ /* The memory page(s) of this device, if any. Also mapped in Guest. */
void *mem;
- /* Watch this fd if handle_input non-NULL. */
+ /* If handle_input is set, it wants to be called when this file
+ * descriptor is ready. */
int fd;
bool (*handle_input)(int fd, struct device *me);
- /* Watch DMA to this key if handle_input non-NULL. */
+ /* If handle_output is set, it wants to be called when the Guest sends
+ * DMA to this key. */
unsigned long watch_key;
u32 (*handle_output)(int fd, const struct iovec *iov,
unsigned int num, struct device *me);
void *priv;
};
+/*L:130
+ * Loading the Kernel.
+ *
+ * We start with couple of simple helper routines. open_or_die() avoids
+ * error-checking code cluttering the callers: */
static int open_or_die(const char *name, int flags)
{
int fd = open(name, flags);
return fd;
}
+/* map_zeroed_pages() takes a (page-aligned) address and a number of pages. */
static void *map_zeroed_pages(unsigned long addr, unsigned int num)
{
+ /* We cache the /dev/zero file-descriptor so we only open it once. */
static int fd = -1;
if (fd == -1)
fd = open_or_die("/dev/zero", O_RDONLY);
+ /* We use a private mapping (ie. if we write to the page, it will be
+ * copied), and obviously we insist that it be mapped where we ask. */
if (mmap((void *)addr, getpagesize() * num,
PROT_READ|PROT_WRITE|PROT_EXEC, MAP_FIXED|MAP_PRIVATE, fd, 0)
!= (void *)addr)
err(1, "Mmaping %u pages of /dev/zero @%p", num, (void *)addr);
+
+ /* Returning the address is just a courtesy: can simplify callers. */
return (void *)addr;
}
-/* Find magic string marking entry point, return entry point. */
+/* To find out where to start we look for the magic Guest string, which marks
+ * the code we see in lguest_asm.S. This is a hack which we are currently
+ * plotting to replace with the normal Linux entry point. */
static unsigned long entry_point(void *start, void *end,
unsigned long page_offset)
{
void *p;
+ /* The scan gives us the physical starting address. We want the
+ * virtual address in this case, and fortunately, we already figured
+ * out the physical-virtual difference and passed it here in
+ * "page_offset". */
for (p = start; p < end; p++)
if (memcmp(p, "GenuineLguest", strlen("GenuineLguest")) == 0)
return (long)p + strlen("GenuineLguest") + page_offset;
err(1, "Is this image a genuine lguest?");
}
-/* Returns the entry point */
+/* This routine takes an open vmlinux image, which is in ELF, and maps it into
+ * the Guest memory. ELF = Embedded Linking Format, which is the format used
+ * by all modern binaries on Linux including the kernel.
+ *
+ * The ELF headers give *two* addresses: a physical address, and a virtual
+ * address. The Guest kernel expects to be placed in memory at the physical
+ * address, and the page tables set up so it will correspond to that virtual
+ * address. We return the difference between the virtual and physical
+ * addresses in the "page_offset" pointer.
+ *
+ * We return the starting address. */
static unsigned long map_elf(int elf_fd, const Elf32_Ehdr *ehdr,
unsigned long *page_offset)
{
unsigned int i;
unsigned long start = -1UL, end = 0;
- /* Sanity checks. */
+ /* Sanity checks on the main ELF header: an x86 executable with a
+ * reasonable number of correctly-sized program headers. */
if (ehdr->e_type != ET_EXEC
|| ehdr->e_machine != EM_386
|| ehdr->e_phentsize != sizeof(Elf32_Phdr)
|| ehdr->e_phnum < 1 || ehdr->e_phnum > 65536U/sizeof(Elf32_Phdr))
errx(1, "Malformed elf header");
+ /* An ELF executable contains an ELF header and a number of "program"
+ * headers which indicate which parts ("segments") of the program to
+ * load where. */
+
+ /* We read in all the program headers at once: */
if (lseek(elf_fd, ehdr->e_phoff, SEEK_SET) < 0)
err(1, "Seeking to program headers");
if (read(elf_fd, phdr, sizeof(phdr)) != sizeof(phdr))
err(1, "Reading program headers");
+ /* We don't know page_offset yet. */
*page_offset = 0;
- /* We map the loadable segments at virtual addresses corresponding
- * to their physical addresses (our virtual == guest physical). */
+
+ /* Try all the headers: there are usually only three. A read-only one,
+ * a read-write one, and a "note" section which isn't loadable. */
for (i = 0; i < ehdr->e_phnum; i++) {
+ /* If this isn't a loadable segment, we ignore it */
if (phdr[i].p_type != PT_LOAD)
continue;
verbose("Section %i: size %i addr %p\n",
i, phdr[i].p_memsz, (void *)phdr[i].p_paddr);
- /* We expect linear address space. */
+ /* We expect a simple linear address space: every segment must
+ * have the same difference between virtual (p_vaddr) and
+ * physical (p_paddr) address. */
if (!*page_offset)
*page_offset = phdr[i].p_vaddr - phdr[i].p_paddr;
else if (*page_offset != phdr[i].p_vaddr - phdr[i].p_paddr)
errx(1, "Page offset of section %i different", i);
+ /* We track the first and last address we mapped, so we can
+ * tell entry_point() where to scan. */
if (phdr[i].p_paddr < start)
start = phdr[i].p_paddr;
if (phdr[i].p_paddr + phdr[i].p_filesz > end)
end = phdr[i].p_paddr + phdr[i].p_filesz;
- /* We map everything private, writable. */
+ /* We map this section of the file at its physical address. We
+ * map it read & write even if the header says this segment is
+ * read-only. The kernel really wants to be writable: it
+ * patches its own instructions which would normally be
+ * read-only.
+ *
+ * MAP_PRIVATE means that the page won't be copied until a
+ * write is done to it. This allows us to share much of the
+ * kernel memory between Guests. */
addr = mmap((void *)phdr[i].p_paddr,
phdr[i].p_filesz,
PROT_READ|PROT_WRITE|PROT_EXEC,
return entry_point((void *)start, (void *)end, *page_offset);
}
-/* This is amazingly reliable. */
+/*L:170 Prepare to be SHOCKED and AMAZED. And possibly a trifle nauseated.
+ *
+ * We know that CONFIG_PAGE_OFFSET sets what virtual address the kernel expects
+ * to be. We don't know what that option was, but we can figure it out
+ * approximately by looking at the addresses in the code. I chose the common
+ * case of reading a memory location into the %eax register:
+ *
+ * movl <some-address>, %eax
+ *
+ * This gets encoded as five bytes: "0xA1 <4-byte-address>". For example,
+ * "0xA1 0x18 0x60 0x47 0xC0" reads the address 0xC0476018 into %eax.
+ *
+ * In this example can guess that the kernel was compiled with
+ * CONFIG_PAGE_OFFSET set to 0xC0000000 (it's always a round number). If the
+ * kernel were larger than 16MB, we might see 0xC1 addresses show up, but our
+ * kernel isn't that bloated yet.
+ *
+ * Unfortunately, x86 has variable-length instructions, so finding this
+ * particular instruction properly involves writing a disassembler. Instead,
+ * we rely on statistics. We look for "0xA1" and tally the different bytes
+ * which occur 4 bytes later (the "0xC0" in our example above). When one of
+ * those bytes appears three times, we can be reasonably confident that it
+ * forms the start of CONFIG_PAGE_OFFSET.
+ *
+ * This is amazingly reliable. */
static unsigned long intuit_page_offset(unsigned char *img, unsigned long len)
{
unsigned int i, possibilities[256] = { 0 };
errx(1, "could not determine page offset");
}
+/*L:160 Unfortunately the entire ELF image isn't compressed: the segments
+ * which need loading are extracted and compressed raw. This denies us the
+ * information we need to make a fully-general loader. */
static unsigned long unpack_bzimage(int fd, unsigned long *page_offset)
{
gzFile f;
int ret, len = 0;
+ /* A bzImage always gets loaded at physical address 1M. This is
+ * actually configurable as CONFIG_PHYSICAL_START, but as the comment
+ * there says, "Don't change this unless you know what you are doing".
+ * Indeed. */
void *img = (void *)0x100000;
+ /* gzdopen takes our file descriptor (carefully placed at the start of
+ * the GZIP header we found) and returns a gzFile. */
f = gzdopen(fd, "rb");
+ /* We read it into memory in 64k chunks until we hit the end. */
while ((ret = gzread(f, img + len, 65536)) > 0)
len += ret;
if (ret < 0)
err(1, "reading image from bzImage");
verbose("Unpacked size %i addr %p\n", len, img);
+
+ /* Without the ELF header, we can't tell virtual-physical gap. This is
+ * CONFIG_PAGE_OFFSET, and people do actually change it. Fortunately,
+ * I have a clever way of figuring it out from the code itself. */
*page_offset = intuit_page_offset(img, len);
return entry_point(img, img + len, *page_offset);
}
+/*L:150 A bzImage, unlike an ELF file, is not meant to be loaded. You're
+ * supposed to jump into it and it will unpack itself. We can't do that
+ * because the Guest can't run the unpacking code, and adding features to
+ * lguest kills puppies, so we don't want to.
+ *
+ * The bzImage is formed by putting the decompressing code in front of the
+ * compressed kernel code. So we can simple scan through it looking for the
+ * first "gzip" header, and start decompressing from there. */
static unsigned long load_bzimage(int fd, unsigned long *page_offset)
{
unsigned char c;
int state = 0;
- /* Ugly brute force search for gzip header. */
+ /* GZIP header is 0x1F 0x8B <method> <flags>... <compressed-by>. */
while (read(fd, &c, 1) == 1) {
switch (state) {
case 0:
state++;
break;
case 9:
+ /* Seek back to the start of the gzip header. */
lseek(fd, -10, SEEK_CUR);
- if (c != 0x03) /* Compressed under UNIX. */
+ /* One final check: "compressed under UNIX". */
+ if (c != 0x03)
state = -1;
else
return unpack_bzimage(fd, page_offset);
errx(1, "Could not find kernel in bzImage");
}
+/*L:140 Loading the kernel is easy when it's a "vmlinux", but most kernels
+ * come wrapped up in the self-decompressing "bzImage" format. With some funky
+ * coding, we can load those, too. */
static unsigned long load_kernel(int fd, unsigned long *page_offset)
{
Elf32_Ehdr hdr;
+ /* Read in the first few bytes. */
if (read(fd, &hdr, sizeof(hdr)) != sizeof(hdr))
err(1, "Reading kernel");
+ /* If it's an ELF file, it starts with "\177ELF" */
if (memcmp(hdr.e_ident, ELFMAG, SELFMAG) == 0)
return map_elf(fd, &hdr, page_offset);
+ /* Otherwise we assume it's a bzImage, and try to unpack it */
return load_bzimage(fd, page_offset);
}
+/* This is a trivial little helper to align pages. Andi Kleen hated it because
+ * it calls getpagesize() twice: "it's dumb code."
+ *
+ * Kernel guys get really het up about optimization, even when it's not
+ * necessary. I leave this code as a reaction against that. */
static inline unsigned long page_align(unsigned long addr)
{
+ /* Add upwards and truncate downwards. */
return ((addr + getpagesize()-1) & ~(getpagesize()-1));
}
-/* initrd gets loaded at top of memory: return length. */
+/*L:180 An "initial ram disk" is a disk image loaded into memory along with
+ * the kernel which the kernel can use to boot from without needing any
+ * drivers. Most distributions now use this as standard: the initrd contains
+ * the code to load the appropriate driver modules for the current machine.
+ *
+ * Importantly, James Morris works for RedHat, and Fedora uses initrds for its
+ * kernels. He sent me this (and tells me when I break it). */
static unsigned long load_initrd(const char *name, unsigned long mem)
{
int ifd;
void *iaddr;
ifd = open_or_die(name, O_RDONLY);
+ /* fstat() is needed to get the file size. */
if (fstat(ifd, &st) < 0)
err(1, "fstat() on initrd '%s'", name);
+ /* The length needs to be rounded up to a page size: mmap needs the
+ * address to be page aligned. */
len = page_align(st.st_size);
+ /* We map the initrd at the top of memory. */
iaddr = mmap((void *)mem - len, st.st_size,
PROT_READ|PROT_EXEC|PROT_WRITE,
MAP_FIXED|MAP_PRIVATE, ifd, 0);
if (iaddr != (void *)mem - len)
err(1, "Mmaping initrd '%s' returned %p not %p",
name, iaddr, (void *)mem - len);
+ /* Once a file is mapped, you can close the file descriptor. It's a
+ * little odd, but quite useful. */
close(ifd);
verbose("mapped initrd %s size=%lu @ %p\n", name, st.st_size, iaddr);
+
+ /* We return the initrd size. */
return len;
}
+/* Once we know how much memory we have, and the address the Guest kernel
+ * expects, we can construct simple linear page tables which will get the Guest
+ * far enough into the boot to create its own.
+ *
+ * We lay them out of the way, just below the initrd (which is why we need to
+ * know its size). */
static unsigned long setup_pagetables(unsigned long mem,
unsigned long initrd_size,
unsigned long page_offset)
unsigned int mapped_pages, i, linear_pages;
unsigned int ptes_per_page = getpagesize()/sizeof(u32);
- /* If we can map all of memory above page_offset, we do so. */
+ /* Ideally we map all physical memory starting at page_offset.
+ * However, if page_offset is 0xC0000000 we can only map 1G of physical
+ * (0xC0000000 + 1G overflows). */
if (mem <= -page_offset)
mapped_pages = mem/getpagesize();
else
mapped_pages = -page_offset/getpagesize();
- /* Each linear PTE page can map ptes_per_page pages. */
+ /* Each PTE page can map ptes_per_page pages: how many do we need? */
linear_pages = (mapped_pages + ptes_per_page-1)/ptes_per_page;
- /* We lay out top-level then linear mapping immediately below initrd */
+ /* We put the toplevel page directory page at the top of memory. */
pgdir = (void *)mem - initrd_size - getpagesize();
+
+ /* Now we use the next linear_pages pages as pte pages */
linear = (void *)pgdir - linear_pages*getpagesize();
+ /* Linear mapping is easy: put every page's address into the mapping in
+ * order. PAGE_PRESENT contains the flags Present, Writable and
+ * Executable. */
for (i = 0; i < mapped_pages; i++)
linear[i] = ((i * getpagesize()) | PAGE_PRESENT);
- /* Now set up pgd so that this memory is at page_offset */
+ /* The top level points to the linear page table pages above. The
+ * entry representing page_offset points to the first one, and they
+ * continue from there. */
for (i = 0; i < mapped_pages; i += ptes_per_page) {
pgdir[(i + page_offset/getpagesize())/ptes_per_page]
= (((u32)linear + i*sizeof(u32)) | PAGE_PRESENT);
verbose("Linear mapping of %u pages in %u pte pages at %p\n",
mapped_pages, linear_pages, linear);
+ /* We return the top level (guest-physical) address: the kernel needs
+ * to know where it is. */
return (unsigned long)pgdir;
}
+/* Simple routine to roll all the commandline arguments together with spaces
+ * between them. */
static void concat(char *dst, char *args[])
{
unsigned int i, len = 0;
dst[len] = '\0';
}
+/* This is where we actually tell the kernel to initialize the Guest. We saw
+ * the arguments it expects when we looked at initialize() in lguest_user.c:
+ * the top physical page to allow, the top level pagetable, the entry point and
+ * the page_offset constant for the Guest. */
static int tell_kernel(u32 pgdir, u32 start, u32 page_offset)
{
u32 args[] = { LHREQ_INITIALIZE,
- LGUEST_GUEST_TOP/getpagesize(), /* Just below us */
- pgdir, start, page_offset };
+ top/getpagesize(), pgdir, start, page_offset };
int fd;
fd = open_or_die("/dev/lguest", O_RDWR);
if (write(fd, args, sizeof(args)) < 0)
err(1, "Writing to /dev/lguest");
+
+ /* We return the /dev/lguest file descriptor to control this Guest */
return fd;
}
+/*:*/
static void set_fd(int fd, struct device_list *devices)
{
devices->max_infd = fd;
}
-/* When input arrives, we tell the kernel to kick lguest out with -EAGAIN. */
+/*L:200
+ * The Waker.
+ *
+ * With a console and network devices, we can have lots of input which we need
+ * to process. We could try to tell the kernel what file descriptors to watch,
+ * but handing a file descriptor mask through to the kernel is fairly icky.
+ *
+ * Instead, we fork off a process which watches the file descriptors and writes
+ * the LHREQ_BREAK command to the /dev/lguest filedescriptor to tell the Host
+ * loop to stop running the Guest. This causes it to return from the
+ * /dev/lguest read with -EAGAIN, where it will write to /dev/lguest to reset
+ * the LHREQ_BREAK and wake us up again.
+ *
+ * This, of course, is merely a different *kind* of icky.
+ */
static void wake_parent(int pipefd, int lguest_fd, struct device_list *devices)
{
+ /* Add the pipe from the Launcher to the fdset in the device_list, so
+ * we watch it, too. */
set_fd(pipefd, devices);
for (;;) {
fd_set rfds = devices->infds;
u32 args[] = { LHREQ_BREAK, 1 };
+ /* Wait until input is ready from one of the devices. */
select(devices->max_infd+1, &rfds, NULL, NULL, NULL);
+ /* Is it a message from the Launcher? */
if (FD_ISSET(pipefd, &rfds)) {
int ignorefd;
+ /* If read() returns 0, it means the Launcher has
+ * exited. We silently follow. */
if (read(pipefd, &ignorefd, sizeof(ignorefd)) == 0)
exit(0);
+ /* Otherwise it's telling us there's a problem with one
+ * of the devices, and we should ignore that file
+ * descriptor from now on. */
FD_CLR(ignorefd, &devices->infds);
- } else
+ } else /* Send LHREQ_BREAK command. */
write(lguest_fd, args, sizeof(args));
}
}
+/* This routine just sets up a pipe to the Waker process. */
static int setup_waker(int lguest_fd, struct device_list *device_list)
{
int pipefd[2], child;
+ /* We create a pipe to talk to the waker, and also so it knows when the
+ * Launcher dies (and closes pipe). */
pipe(pipefd);
child = fork();
if (child == -1)
err(1, "forking");
if (child == 0) {
+ /* Close the "writing" end of our copy of the pipe */
close(pipefd[1]);
wake_parent(pipefd[0], lguest_fd, device_list);
}
+ /* Close the reading end of our copy of the pipe. */
close(pipefd[0]);
+ /* Here is the fd used to talk to the waker. */
return pipefd[1];
}
+/*L:210
+ * Device Handling.
+ *
+ * When the Guest sends DMA to us, it sends us an array of addresses and sizes.
+ * We need to make sure it's not trying to reach into the Launcher itself, so
+ * we have a convenient routine which check it and exits with an error message
+ * if something funny is going on:
+ */
static void *_check_pointer(unsigned long addr, unsigned int size,
unsigned int line)
{
- if (addr >= LGUEST_GUEST_TOP || addr + size >= LGUEST_GUEST_TOP)
+ /* We have to separately check addr and addr+size, because size could
+ * be huge and addr + size might wrap around. */
+ if (addr >= top || addr + size >= top)
errx(1, "%s:%i: Invalid address %li", __FILE__, line, addr);
+ /* We return a pointer for the caller's convenience, now we know it's
+ * safe to use. */
return (void *)addr;
}
+/* A macro which transparently hands the line number to the real function. */
#define check_pointer(addr,size) _check_pointer(addr, size, __LINE__)
-/* Returns pointer to dma->used_len */
+/* The Guest has given us the address of a "struct lguest_dma". We check it's
+ * OK and convert it to an iovec (which is a simple array of ptr/size
+ * pairs). */
static u32 *dma2iov(unsigned long dma, struct iovec iov[], unsigned *num)
{
unsigned int i;
struct lguest_dma *udma;
+ /* First we make sure that the array memory itself is valid. */
udma = check_pointer(dma, sizeof(*udma));
+ /* Now we check each element */
for (i = 0; i < LGUEST_MAX_DMA_SECTIONS; i++) {
+ /* A zero length ends the array. */
if (!udma->len[i])
break;
iov[i].iov_len = udma->len[i];
}
*num = i;
+
+ /* We return the pointer to where the caller should write the amount of
+ * the buffer used. */
return &udma->used_len;
}
+/* This routine gets a DMA buffer from the Guest for a given key, and converts
+ * it to an iovec array. It returns the interrupt the Guest wants when we're
+ * finished, and a pointer to the "used_len" field to fill in. */
static u32 *get_dma_buffer(int fd, void *key,
struct iovec iov[], unsigned int *num, u32 *irq)
{
unsigned long udma;
u32 *res;
+ /* Ask the kernel for a DMA buffer corresponding to this key. */
udma = write(fd, buf, sizeof(buf));
+ /* They haven't registered any, or they're all used? */
if (udma == (unsigned long)-1)
return NULL;
- /* Kernel stashes irq in ->used_len. */
+ /* Convert it into our iovec array */
res = dma2iov(udma, iov, num);
+ /* The kernel stashes irq in ->used_len to get it out to us. */
*irq = *res;
+ /* Return a pointer to ((struct lguest_dma *)udma)->used_len. */
return res;
}
+/* This is a convenient routine to send the Guest an interrupt. */
static void trigger_irq(int fd, u32 irq)
{
u32 buf[] = { LHREQ_IRQ, irq };
err(1, "Triggering irq %i", irq);
}
+/* This simply sets up an iovec array where we can put data to be discarded.
+ * This happens when the Guest doesn't want or can't handle the input: we have
+ * to get rid of it somewhere, and if we bury it in the ceiling space it will
+ * start to smell after a week. */
static void discard_iovec(struct iovec *iov, unsigned int *num)
{
static char discard_buf[1024];
iov->iov_len = sizeof(discard_buf);
}
+/* Here is the input terminal setting we save, and the routine to restore them
+ * on exit so the user can see what they type next. */
static struct termios orig_term;
static void restore_term(void)
{
tcsetattr(STDIN_FILENO, TCSANOW, &orig_term);
}
+/* We associate some data with the console for our exit hack. */
struct console_abort
{
+ /* How many times have they hit ^C? */
int count;
+ /* When did they start? */
struct timeval start;
};
-/* We DMA input to buffer bound at start of console page. */
+/* This is the routine which handles console input (ie. stdin). */
static bool handle_console_input(int fd, struct device *dev)
{
u32 irq = 0, *lenp;
struct iovec iov[LGUEST_MAX_DMA_SECTIONS];
struct console_abort *abort = dev->priv;
+ /* First we get the console buffer from the Guest. The key is dev->mem
+ * which was set to 0 in setup_console(). */
lenp = get_dma_buffer(fd, dev->mem, iov, &num, &irq);
if (!lenp) {
+ /* If it's not ready for input, warn and set up to discard. */
warn("console: no dma buffer!");
discard_iovec(iov, &num);
}
+ /* This is why we convert to iovecs: the readv() call uses them, and so
+ * it reads straight into the Guest's buffer. */
len = readv(dev->fd, iov, num);
if (len <= 0) {
+ /* This implies that the console is closed, is /dev/null, or
+ * something went terribly wrong. We still go through the rest
+ * of the logic, though, especially the exit handling below. */
warnx("Failed to get console input, ignoring console.");
len = 0;
}
+ /* If we read the data into the Guest, fill in the length and send the
+ * interrupt. */
if (lenp) {
*lenp = len;
trigger_irq(fd, irq);
}
- /* Three ^C within one second? Exit. */
+ /* Three ^C within one second? Exit.
+ *
+ * This is such a hack, but works surprisingly well. Each ^C has to be
+ * in a buffer by itself, so they can't be too fast. But we check that
+ * we get three within about a second, so they can't be too slow. */
if (len == 1 && ((char *)iov[0].iov_base)[0] == 3) {
if (!abort->count++)
gettimeofday(&abort->start, NULL);
struct timeval now;
gettimeofday(&now, NULL);
if (now.tv_sec <= abort->start.tv_sec+1) {
- /* Make sure waker is not blocked in BREAK */
u32 args[] = { LHREQ_BREAK, 0 };
+ /* Close the fd so Waker will know it has to
+ * exit. */
close(waker_fd);
+ /* Just in case waker is blocked in BREAK, send
+ * unbreak now. */
write(fd, args, sizeof(args));
exit(2);
}
abort->count = 0;
}
} else
+ /* Any other key resets the abort counter. */
abort->count = 0;
+ /* Now, if we didn't read anything, put the input terminal back and
+ * return failure (meaning, don't call us again). */
if (!len) {
restore_term();
return false;
}
+ /* Everything went OK! */
return true;
}
+/* Handling console output is much simpler than input. */
static u32 handle_console_output(int fd, const struct iovec *iov,
unsigned num, struct device*dev)
{
+ /* Whatever the Guest sends, write it to standard output. Return the
+ * number of bytes written. */
return writev(STDOUT_FILENO, iov, num);
}
+/* Guest->Host network output is also pretty easy. */
static u32 handle_tun_output(int fd, const struct iovec *iov,
unsigned num, struct device *dev)
{
- /* Now we've seen output, we should warn if we can't get buffers. */
+ /* We put a flag in the "priv" pointer of the network device, and set
+ * it as soon as we see output. We'll see why in handle_tun_input() */
*(bool *)dev->priv = true;
+ /* Whatever packet the Guest sent us, write it out to the tun
+ * device. */
return writev(dev->fd, iov, num);
}
+/* This matches the peer_key() in lguest_net.c. The key for any given slot
+ * is the address of the network device's page plus 4 * the slot number. */
static unsigned long peer_offset(unsigned int peernum)
{
return 4 * peernum;
}
+/* This is where we handle a packet coming in from the tun device */
static bool handle_tun_input(int fd, struct device *dev)
{
u32 irq = 0, *lenp;
unsigned num;
struct iovec iov[LGUEST_MAX_DMA_SECTIONS];
+ /* First we get a buffer the Guest has bound to its key. */
lenp = get_dma_buffer(fd, dev->mem+peer_offset(NET_PEERNUM), iov, &num,
&irq);
if (!lenp) {
+ /* Now, it's expected that if we try to send a packet too
+ * early, the Guest won't be ready yet. This is why we set a
+ * flag when the Guest sends its first packet. If it's sent a
+ * packet we assume it should be ready to receive them.
+ *
+ * Actually, this is what the status bits in the descriptor are
+ * for: we should *use* them. FIXME! */
if (*(bool *)dev->priv)
warn("network: no dma buffer!");
discard_iovec(iov, &num);
}
+ /* Read the packet from the device directly into the Guest's buffer. */
len = readv(dev->fd, iov, num);
if (len <= 0)
err(1, "reading network");
+
+ /* Write the used_len, and trigger the interrupt for the Guest */
if (lenp) {
*lenp = len;
trigger_irq(fd, irq);
verbose("tun input packet len %i [%02x %02x] (%s)\n", len,
((u8 *)iov[0].iov_base)[0], ((u8 *)iov[0].iov_base)[1],
lenp ? "sent" : "discarded");
+ /* All good. */
return true;
}
+/* The last device handling routine is block output: the Guest has sent a DMA
+ * to the block device. It will have placed the command it wants in the
+ * "struct lguest_block_page". */
static u32 handle_block_output(int fd, const struct iovec *iov,
unsigned num, struct device *dev)
{
struct iovec reply[LGUEST_MAX_DMA_SECTIONS];
off64_t device_len, off = (off64_t)p->sector * 512;
+ /* First we extract the device length from the dev->priv pointer. */
device_len = *(off64_t *)dev->priv;
+ /* We first check that the read or write is within the length of the
+ * block file. */
if (off >= device_len)
err(1, "Bad offset %llu vs %llu", off, device_len);
+ /* Move to the right location in the block file. This shouldn't fail,
+ * but best to check. */
if (lseek64(dev->fd, off, SEEK_SET) != off)
err(1, "Bad seek to sector %i", p->sector);
verbose("Block: %s at offset %llu\n", p->type ? "WRITE" : "READ", off);
+ /* They were supposed to bind a reply buffer at key equal to the start
+ * of the block device memory. We need this to tell them when the
+ * request is finished. */
lenp = get_dma_buffer(fd, dev->mem, reply, &reply_num, &irq);
if (!lenp)
err(1, "Block request didn't give us a dma buffer");
if (p->type) {
+ /* A write request. The DMA they sent contained the data, so
+ * write it out. */
len = writev(dev->fd, iov, num);
+ /* Grr... Now we know how long the "struct lguest_dma" they
+ * sent was, we make sure they didn't try to write over the end
+ * of the block file (possibly extending it). */
if (off + len > device_len) {
+ /* Trim it back to the correct length */
ftruncate(dev->fd, device_len);
+ /* Die, bad Guest, die. */
errx(1, "Write past end %llu+%u", off, len);
}
+ /* The reply length is 0: we just send back an empty DMA to
+ * interrupt them and tell them the write is finished. */
*lenp = 0;
} else {
+ /* A read request. They sent an empty DMA to start the
+ * request, and we put the read contents into the reply
+ * buffer. */
len = readv(dev->fd, reply, reply_num);
*lenp = len;
}
+ /* The result is 1 (done), 2 if there was an error (short read or
+ * write). */
p->result = 1 + (p->bytes != len);
+ /* Now tell them we've used their reply buffer. */
trigger_irq(fd, irq);
+
+ /* We're supposed to return the number of bytes of the output buffer we
+ * used. But the block device uses the "result" field instead, so we
+ * don't bother. */
return 0;
}
+/* This is the generic routine we call when the Guest sends some DMA out. */
static void handle_output(int fd, unsigned long dma, unsigned long key,
struct device_list *devices)
{
struct iovec iov[LGUEST_MAX_DMA_SECTIONS];
unsigned num = 0;
+ /* Convert the "struct lguest_dma" they're sending to a "struct
+ * iovec". */
lenp = dma2iov(dma, iov, &num);
+
+ /* Check each device: if they expect output to this key, tell them to
+ * handle it. */
for (i = devices->dev; i; i = i->next) {
if (i->handle_output && key == i->watch_key) {
+ /* We write the result straight into the used_len field
+ * for them. */
*lenp = i->handle_output(fd, iov, num, i);
return;
}
}
+
+ /* This can happen: the kernel sends any SEND_DMA which doesn't match
+ * another Guest to us. It could be that another Guest just left a
+ * network, for example. But it's unusual. */
warnx("Pending dma %p, key %p", (void *)dma, (void *)key);
}
+/* This is called when the waker wakes us up: check for incoming file
+ * descriptors. */
static void handle_input(int fd, struct device_list *devices)
{
+ /* select() wants a zeroed timeval to mean "don't wait". */
struct timeval poll = { .tv_sec = 0, .tv_usec = 0 };
for (;;) {
struct device *i;
fd_set fds = devices->infds;
+ /* If nothing is ready, we're done. */
if (select(devices->max_infd+1, &fds, NULL, NULL, &poll) == 0)
break;
+ /* Otherwise, call the device(s) which have readable
+ * file descriptors and a method of handling them. */
for (i = devices->dev; i; i = i->next) {
if (i->handle_input && FD_ISSET(i->fd, &fds)) {
+ /* If handle_input() returns false, it means we
+ * should no longer service it.
+ * handle_console_input() does this. */
if (!i->handle_input(fd, i)) {
+ /* Clear it from the set of input file
+ * descriptors kept at the head of the
+ * device list. */
FD_CLR(i->fd, &devices->infds);
/* Tell waker to ignore it too... */
write(waker_fd, &i->fd, sizeof(i->fd));
}
}
-static struct lguest_device_desc *new_dev_desc(u16 type, u16 features,
- u16 num_pages)
+/*L:190
+ * Device Setup
+ *
+ * All devices need a descriptor so the Guest knows it exists, and a "struct
+ * device" so the Launcher can keep track of it. We have common helper
+ * routines to allocate them.
+ *
+ * This routine allocates a new "struct lguest_device_desc" from descriptor
+ * table in the devices array just above the Guest's normal memory. */
+static struct lguest_device_desc *
+new_dev_desc(struct lguest_device_desc *descs,
+ u16 type, u16 features, u16 num_pages)
{
- static unsigned long top = LGUEST_GUEST_TOP;
- struct lguest_device_desc *desc;
+ unsigned int i;
- desc = malloc(sizeof(*desc));
- desc->type = type;
- desc->num_pages = num_pages;
- desc->features = features;
- desc->status = 0;
- if (num_pages) {
- top -= num_pages*getpagesize();
- map_zeroed_pages(top, num_pages);
- desc->pfn = top / getpagesize();
- } else
- desc->pfn = 0;
- return desc;
+ for (i = 0; i < LGUEST_MAX_DEVICES; i++) {
+ if (!descs[i].type) {
+ descs[i].type = type;
+ descs[i].features = features;
+ descs[i].num_pages = num_pages;
+ /* If they said the device needs memory, we allocate
+ * that now, bumping up the top of Guest memory. */
+ if (num_pages) {
+ map_zeroed_pages(top, num_pages);
+ descs[i].pfn = top/getpagesize();
+ top += num_pages*getpagesize();
+ }
+ return &descs[i];
+ }
+ }
+ errx(1, "too many devices");
}
+/* This monster routine does all the creation and setup of a new device,
+ * including caling new_dev_desc() to allocate the descriptor and device
+ * memory. */
static struct device *new_device(struct device_list *devices,
u16 type, u16 num_pages, u16 features,
int fd,
{
struct device *dev = malloc(sizeof(*dev));
- /* Append to device list. */
+ /* Append to device list. Prepending to a single-linked list is
+ * easier, but the user expects the devices to be arranged on the bus
+ * in command-line order. The first network device on the command line
+ * is eth0, the first block device /dev/lgba, etc. */
*devices->lastdev = dev;
dev->next = NULL;
devices->lastdev = &dev->next;
+ /* Now we populate the fields one at a time. */
dev->fd = fd;
+ /* If we have an input handler for this file descriptor, then we add it
+ * to the device_list's fdset and maxfd. */
if (handle_input)
set_fd(dev->fd, devices);
- dev->desc = new_dev_desc(type, features, num_pages);
+ dev->desc = new_dev_desc(devices->descs, type, features, num_pages);
dev->mem = (void *)(dev->desc->pfn * getpagesize());
dev->handle_input = handle_input;
dev->watch_key = (unsigned long)dev->mem + watch_off;
return dev;
}
+/* Our first setup routine is the console. It's a fairly simple device, but
+ * UNIX tty handling makes it uglier than it could be. */
static void setup_console(struct device_list *devices)
{
struct device *dev;
+ /* If we can save the initial standard input settings... */
if (tcgetattr(STDIN_FILENO, &orig_term) == 0) {
struct termios term = orig_term;
+ /* Then we turn off echo, line buffering and ^C etc. We want a
+ * raw input stream to the Guest. */
term.c_lflag &= ~(ISIG|ICANON|ECHO);
tcsetattr(STDIN_FILENO, TCSANOW, &term);
+ /* If we exit gracefully, the original settings will be
+ * restored so the user can see what they're typing. */
atexit(restore_term);
}
- /* We don't currently require a page for the console. */
+ /* We don't currently require any memory for the console, so we ask for
+ * 0 pages. */
dev = new_device(devices, LGUEST_DEVICE_T_CONSOLE, 0, 0,
STDIN_FILENO, handle_console_input,
LGUEST_CONSOLE_DMA_KEY, handle_console_output);
+ /* We store the console state in dev->priv, and initialize it. */
dev->priv = malloc(sizeof(struct console_abort));
((struct console_abort *)dev->priv)->count = 0;
verbose("device %p: console\n",
(void *)(dev->desc->pfn * getpagesize()));
}
+/* Setting up a block file is also fairly straightforward. */
static void setup_block_file(const char *filename, struct device_list *devices)
{
int fd;
off64_t *device_len;
struct lguest_block_page *p;
+ /* We open with O_LARGEFILE because otherwise we get stuck at 2G. We
+ * open with O_DIRECT because otherwise our benchmarks go much too
+ * fast. */
fd = open_or_die(filename, O_RDWR|O_LARGEFILE|O_DIRECT);
+
+ /* We want one page, and have no input handler (the block file never
+ * has anything interesting to say to us). Our timing will be quite
+ * random, so it should be a reasonable randomness source. */
dev = new_device(devices, LGUEST_DEVICE_T_BLOCK, 1,
LGUEST_DEVICE_F_RANDOMNESS,
fd, NULL, 0, handle_block_output);
+
+ /* We store the device size in the private area */
device_len = dev->priv = malloc(sizeof(*device_len));
+ /* This is the safe way of establishing the size of our device: it
+ * might be a normal file or an actual block device like /dev/hdb. */
*device_len = lseek64(fd, 0, SEEK_END);
- p = dev->mem;
+ /* The device memory is a "struct lguest_block_page". It's zeroed
+ * already, we just need to put in the device size. Block devices
+ * think in sectors (ie. 512 byte chunks), so we translate here. */
+ p = dev->mem;
p->num_sectors = *device_len/512;
verbose("device %p: block %i sectors\n",
(void *)(dev->desc->pfn * getpagesize()), p->num_sectors);
}
-/* We use fnctl locks to reserve network slots (autocleanup!) */
+/*
+ * Network Devices.
+ *
+ * Setting up network devices is quite a pain, because we have three types.
+ * First, we have the inter-Guest network. This is a file which is mapped into
+ * the address space of the Guests who are on the network. Because it is a
+ * shared mapping, the same page underlies all the devices, and they can send
+ * DMA to each other.
+ *
+ * Remember from our network driver, the Guest is told what slot in the page it
+ * is to use. We use exclusive fnctl locks to reserve a slot. If another
+ * Guest is using a slot, the lock will fail and we try another. Because fnctl
+ * locks are cleaned up automatically when we die, this cleverly means that our
+ * reservation on the slot will vanish if we crash. */
static unsigned int find_slot(int netfd, const char *filename)
{
struct flock fl;
fl.l_type = F_WRLCK;
fl.l_whence = SEEK_SET;
fl.l_len = 1;
+ /* Try a 1 byte lock in each possible position number */
for (fl.l_start = 0;
fl.l_start < getpagesize()/sizeof(struct lguest_net);
fl.l_start++) {
+ /* If we succeed, return the slot number. */
if (fcntl(netfd, F_SETLK, &fl) == 0)
return fl.l_start;
}
errx(1, "No free slots in network file %s", filename);
}
+/* This function sets up the network file */
static void setup_net_file(const char *filename,
struct device_list *devices)
{
int netfd;
struct device *dev;
+ /* We don't use open_or_die() here: for friendliness we create the file
+ * if it doesn't already exist. */
netfd = open(filename, O_RDWR, 0);
if (netfd < 0) {
if (errno == ENOENT) {
netfd = open(filename, O_RDWR|O_CREAT, 0600);
if (netfd >= 0) {
+ /* If we succeeded, initialize the file with a
+ * blank page. */
char page[getpagesize()];
memset(page, 0, sizeof(page));
write(netfd, page, sizeof(page));
err(1, "cannot open net file '%s'", filename);
}
+ /* We need 1 page, and the features indicate the slot to use and that
+ * no checksum is needed. We never touch this device again; it's
+ * between the Guests on the network, so we don't register input or
+ * output handlers. */
dev = new_device(devices, LGUEST_DEVICE_T_NET, 1,
find_slot(netfd, filename)|LGUEST_NET_F_NOCSUM,
-1, NULL, 0, NULL);
- /* We overwrite the /dev/zero mapping with the actual file. */
+ /* Map the shared file. */
if (mmap(dev->mem, getpagesize(), PROT_READ|PROT_WRITE,
MAP_FIXED|MAP_SHARED, netfd, 0) != dev->mem)
err(1, "could not mmap '%s'", filename);
(void *)(dev->desc->pfn * getpagesize()), filename,
dev->desc->features & ~LGUEST_NET_F_NOCSUM);
}
+/*:*/
static u32 str2ip(const char *ipaddr)
{
return (byte[0] << 24) | (byte[1] << 16) | (byte[2] << 8) | byte[3];
}
-/* adapted from libbridge */
+/* This code is "adapted" from libbridge: it attaches the Host end of the
+ * network device to the bridge device specified by the command line.
+ *
+ * This is yet another James Morris contribution (I'm an IP-level guy, so I
+ * dislike bridging), and I just try not to break it. */
static void add_to_bridge(int fd, const char *if_name, const char *br_name)
{
int ifidx;
err(1, "can't add %s to bridge %s", if_name, br_name);
}
+/* This sets up the Host end of the network device with an IP address, brings
+ * it up so packets will flow, the copies the MAC address into the hwaddr
+ * pointer (in practice, the Host's slot in the network device's memory). */
static void configure_device(int fd, const char *devname, u32 ipaddr,
unsigned char hwaddr[6])
{
struct ifreq ifr;
struct sockaddr_in *sin = (struct sockaddr_in *)&ifr.ifr_addr;
+ /* Don't read these incantations. Just cut & paste them like I did! */
memset(&ifr, 0, sizeof(ifr));
strcpy(ifr.ifr_name, devname);
sin->sin_family = AF_INET;
if (ioctl(fd, SIOCSIFFLAGS, &ifr) != 0)
err(1, "Bringing interface %s up", devname);
+ /* SIOC stands for Socket I/O Control. G means Get (vs S for Set
+ * above). IF means Interface, and HWADDR is hardware address.
+ * Simple! */
if (ioctl(fd, SIOCGIFHWADDR, &ifr) != 0)
err(1, "getting hw address for %s", devname);
-
memcpy(hwaddr, ifr.ifr_hwaddr.sa_data, 6);
}
+/*L:195 The other kind of network is a Host<->Guest network. This can either
+ * use briding or routing, but the principle is the same: it uses the "tun"
+ * device to inject packets into the Host as if they came in from a normal
+ * network card. We just shunt packets between the Guest and the tun
+ * device. */
static void setup_tun_net(const char *arg, struct device_list *devices)
{
struct device *dev;
u32 ip;
const char *br_name = NULL;
+ /* We open the /dev/net/tun device and tell it we want a tap device. A
+ * tap device is like a tun device, only somehow different. To tell
+ * the truth, I completely blundered my way through this code, but it
+ * works now! */
netfd = open_or_die("/dev/net/tun", O_RDWR);
memset(&ifr, 0, sizeof(ifr));
ifr.ifr_flags = IFF_TAP | IFF_NO_PI;
strcpy(ifr.ifr_name, "tap%d");
if (ioctl(netfd, TUNSETIFF, &ifr) != 0)
err(1, "configuring /dev/net/tun");
+ /* We don't need checksums calculated for packets coming in this
+ * device: trust us! */
ioctl(netfd, TUNSETNOCSUM, 1);
- /* You will be peer 1: we should create enough jitter to randomize */
+ /* We create the net device with 1 page, using the features field of
+ * the descriptor to tell the Guest it is in slot 1 (NET_PEERNUM), and
+ * that the device has fairly random timing. We do *not* specify
+ * LGUEST_NET_F_NOCSUM: these packets can reach the real world.
+ *
+ * We will put our MAC address is slot 0 for the Guest to see, so
+ * it will send packets to us using the key "peer_offset(0)": */
dev = new_device(devices, LGUEST_DEVICE_T_NET, 1,
NET_PEERNUM|LGUEST_DEVICE_F_RANDOMNESS, netfd,
handle_tun_input, peer_offset(0), handle_tun_output);
+
+ /* We keep a flag which says whether we've seen packets come out from
+ * this network device. */
dev->priv = malloc(sizeof(bool));
*(bool *)dev->priv = false;
+ /* We need a socket to perform the magic network ioctls to bring up the
+ * tap interface, connect to the bridge etc. Any socket will do! */
ipfd = socket(PF_INET, SOCK_DGRAM, IPPROTO_IP);
if (ipfd < 0)
err(1, "opening IP socket");
+ /* If the command line was --tunnet=bridge:<name> do bridging. */
if (!strncmp(BRIDGE_PFX, arg, strlen(BRIDGE_PFX))) {
ip = INADDR_ANY;
br_name = arg + strlen(BRIDGE_PFX);
add_to_bridge(ipfd, ifr.ifr_name, br_name);
- } else
+ } else /* It is an IP address to set up the device with */
ip = str2ip(arg);
- /* We are peer 0, ie. first slot. */
+ /* We are peer 0, ie. first slot, so we hand dev->mem to this routine
+ * to write the MAC address at the start of the device memory. */
configure_device(ipfd, ifr.ifr_name, ip, dev->mem);
- /* Set "promisc" bit: we want every single packet. */
+ /* Set "promisc" bit: we want every single packet if we're going to
+ * bridge to other machines (and otherwise it doesn't matter). */
*((u8 *)dev->mem) |= 0x1;
close(ipfd);
if (br_name)
verbose("attached to bridge: %s\n", br_name);
}
+/* That's the end of device setup. */
-/* Now we know how much memory we have, we copy in device descriptors */
-static void map_device_descriptors(struct device_list *devs, unsigned long mem)
-{
- struct device *i;
- unsigned int num;
- struct lguest_device_desc *descs;
-
- /* Device descriptor array sits just above top of normal memory */
- descs = map_zeroed_pages(mem, 1);
-
- for (i = devs->dev, num = 0; i; i = i->next, num++) {
- if (num == LGUEST_MAX_DEVICES)
- errx(1, "too many devices");
- verbose("Device %i: %s\n", num,
- i->desc->type == LGUEST_DEVICE_T_NET ? "net"
- : i->desc->type == LGUEST_DEVICE_T_CONSOLE ? "console"
- : i->desc->type == LGUEST_DEVICE_T_BLOCK ? "block"
- : "unknown");
- descs[num] = *i->desc;
- free(i->desc);
- i->desc = &descs[num];
- }
-}
-
+/*L:220 Finally we reach the core of the Launcher, which runs the Guest, serves
+ * its input and output, and finally, lays it to rest. */
static void __attribute__((noreturn))
run_guest(int lguest_fd, struct device_list *device_list)
{
/* We read from the /dev/lguest device to run the Guest. */
readval = read(lguest_fd, arr, sizeof(arr));
+ /* The read can only really return sizeof(arr) (the Guest did a
+ * SEND_DMA to us), or an error. */
+
+ /* For a successful read, arr[0] is the address of the "struct
+ * lguest_dma", and arr[1] is the key the Guest sent to. */
if (readval == sizeof(arr)) {
handle_output(lguest_fd, arr[0], arr[1], device_list);
continue;
+ /* ENOENT means the Guest died. Reading tells us why. */
} else if (errno == ENOENT) {
char reason[1024] = { 0 };
read(lguest_fd, reason, sizeof(reason)-1);
errx(1, "%s", reason);
+ /* EAGAIN means the waker wanted us to look at some input.
+ * Anything else means a bug or incompatible change. */
} else if (errno != EAGAIN)
err(1, "Running guest failed");
+
+ /* Service input, then unset the BREAK which releases
+ * the Waker. */
handle_input(lguest_fd, device_list);
if (write(lguest_fd, args, sizeof(args)) < 0)
err(1, "Resetting break");
}
}
+/*
+ * This is the end of the Launcher.
+ *
+ * But wait! We've seen I/O from the Launcher, and we've seen I/O from the
+ * Drivers. If we were to see the Host kernel I/O code, our understanding
+ * would be complete... :*/
static struct option opts[] = {
{ "verbose", 0, NULL, 'v' },
"<mem-in-mb> vmlinux [args...]");
}
+/*L:100 The Launcher code itself takes us out into userspace, that scary place
+ * where pointers run wild and free! Unfortunately, like most userspace
+ * programs, it's quite boring (which is why everyone like to hack on the
+ * kernel!). Perhaps if you make up an Lguest Drinking Game at this point, it
+ * will get you through this section. Or, maybe not.
+ *
+ * The Launcher binary sits up high, usually starting at address 0xB8000000.
+ * Everything below this is the "physical" memory for the Guest. For example,
+ * if the Guest were to write a "1" at physical address 0, we would see a "1"
+ * in the Launcher at "(int *)0". Guest physical == Launcher virtual.
+ *
+ * This can be tough to get your head around, but usually it just means that we
+ * don't need to do any conversion when the Guest gives us it's "physical"
+ * addresses.
+ */
int main(int argc, char *argv[])
{
- unsigned long mem, pgdir, start, page_offset, initrd_size = 0;
- int c, lguest_fd;
+ /* Memory, top-level pagetable, code startpoint, PAGE_OFFSET and size
+ * of the (optional) initrd. */
+ unsigned long mem = 0, pgdir, start, page_offset, initrd_size = 0;
+ /* A temporary and the /dev/lguest file descriptor. */
+ int i, c, lguest_fd;
+ /* The list of Guest devices, based on command line arguments. */
struct device_list device_list;
+ /* The boot information for the Guest: at guest-physical address 0. */
void *boot = (void *)0;
+ /* If they specify an initrd file to load. */
const char *initrd_name = NULL;
+ /* First we initialize the device list. Since console and network
+ * device receive input from a file descriptor, we keep an fdset
+ * (infds) and the maximum fd number (max_infd) with the head of the
+ * list. We also keep a pointer to the last device, for easy appending
+ * to the list. */
device_list.max_infd = -1;
device_list.dev = NULL;
device_list.lastdev = &device_list.dev;
FD_ZERO(&device_list.infds);
+ /* We need to know how much memory so we can set up the device
+ * descriptor and memory pages for the devices as we parse the command
+ * line. So we quickly look through the arguments to find the amount
+ * of memory now. */
+ for (i = 1; i < argc; i++) {
+ if (argv[i][0] != '-') {
+ mem = top = atoi(argv[i]) * 1024 * 1024;
+ device_list.descs = map_zeroed_pages(top, 1);
+ top += getpagesize();
+ break;
+ }
+ }
+
+ /* The options are fairly straight-forward */
while ((c = getopt_long(argc, argv, "v", opts, NULL)) != EOF) {
switch (c) {
case 'v':
usage();
}
}
+ /* After the other arguments we expect memory and kernel image name,
+ * followed by command line arguments for the kernel. */
if (optind + 2 > argc)
usage();
- /* We need a console device */
+ /* We always have a console device */
setup_console(&device_list);
- /* First we map /dev/zero over all of guest-physical memory. */
- mem = atoi(argv[optind]) * 1024 * 1024;
+ /* We start by mapping anonymous pages over all of guest-physical
+ * memory range. This fills it with 0, and ensures that the Guest
+ * won't be killed when it tries to access it. */
map_zeroed_pages(0, mem / getpagesize());
/* Now we load the kernel */
start = load_kernel(open_or_die(argv[optind+1], O_RDONLY),
&page_offset);
- /* Write the device descriptors into memory. */
- map_device_descriptors(&device_list, mem);
-
- /* Map the initrd image if requested */
+ /* Map the initrd image if requested (at top of physical memory) */
if (initrd_name) {
initrd_size = load_initrd(initrd_name, mem);
+ /* These are the location in the Linux boot header where the
+ * start and size of the initrd are expected to be found. */
*(unsigned long *)(boot+0x218) = mem - initrd_size;
*(unsigned long *)(boot+0x21c) = initrd_size;
+ /* The bootloader type 0xFF means "unknown"; that's OK. */
*(unsigned char *)(boot+0x210) = 0xFF;
}
- /* Set up the initial linar pagetables. */
+ /* Set up the initial linear pagetables, starting below the initrd. */
pgdir = setup_pagetables(mem, initrd_size, page_offset);
- /* E820 memory map: ours is a simple, single region. */
+ /* The Linux boot header contains an "E820" memory map: ours is a
+ * simple, single region. */
*(char*)(boot+E820NR) = 1;
*((struct e820entry *)(boot+E820MAP))
= ((struct e820entry) { 0, mem, E820_RAM });
- /* Command line pointer and command line (at 4096) */
+ /* The boot header contains a command line pointer: we put the command
+ * line after the boot header (at address 4096) */
*(void **)(boot + 0x228) = boot + 4096;
concat(boot + 4096, argv+optind+2);
- /* Paravirt type: 1 == lguest */
+
+ /* The guest type value of "1" tells the Guest it's under lguest. */
*(int *)(boot + 0x23c) = 1;
+ /* We tell the kernel to initialize the Guest: this returns the open
+ * /dev/lguest file descriptor. */
lguest_fd = tell_kernel(pgdir, start, page_offset);
+
+ /* We fork off a child process, which wakes the Launcher whenever one
+ * of the input file descriptors needs attention. Otherwise we would
+ * run the Guest until it tries to output something. */
waker_fd = setup_waker(lguest_fd, &device_list);
+ /* Finally, run the Guest. This doesn't return. */
run_guest(lguest_fd, &device_list);
}
+/*:*/
+
+/*M:999
+ * Mastery is done: you now know everything I do.
+ *
+ * But surely you have seen code, features and bugs in your wanderings which
+ * you now yearn to attack? That is the real game, and I look forward to you
+ * patching and forking lguest into the Your-Name-Here-visor.
+ *
+ * Farewell, and good coding!
+ * Rusty Russell.
+ */
-Version 10 of schedstats includes support for sched_domains, which
-hit the mainline kernel in 2.6.7. Some counters make more sense to be
-per-runqueue; other to be per-domain. Note that domains (and their associated
-information) will only be pertinent and available on machines utilizing
-CONFIG_SMP.
-
-In version 10 of schedstat, there is at least one level of domain
+Version 14 of schedstats includes support for sched_domains, which hit the
+mainline kernel in 2.6.20 although it is identical to the stats from version
+12 which was in the kernel from 2.6.13-2.6.19 (version 13 never saw a kernel
+release). Some counters make more sense to be per-runqueue; other to be
+per-domain. Note that domains (and their associated information) will only
+be pertinent and available on machines utilizing CONFIG_SMP.
+
+In version 14 of schedstat, there is at least one level of domain
statistics for each cpu listed, and there may well be more than one
domain. Domains have no particular names in this implementation, but
the highest numbered one typically arbitrates balancing across all the
CPU statistics
--------------
-cpu<N> 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28
+cpu<N> 1 2 3 4 5 6 7 8 9 10 11 12
NOTE: In the sched_yield() statistics, the active queue is considered empty
if it has only one process in it, since obviously the process calling
3) # of times just the expired queue was empty
4) # of times sched_yield() was called
-Next four are schedule() statistics:
- 5) # of times the active queue had at least one other process on it
- 6) # of times we switched to the expired queue and reused it
- 7) # of times schedule() was called
- 8) # of times schedule() left the processor idle
-
-Next four are active_load_balance() statistics:
- 9) # of times active_load_balance() was called
- 10) # of times active_load_balance() caused this cpu to gain a task
- 11) # of times active_load_balance() caused this cpu to lose a task
- 12) # of times active_load_balance() tried to move a task and failed
-
-Next three are try_to_wake_up() statistics:
- 13) # of times try_to_wake_up() was called
- 14) # of times try_to_wake_up() successfully moved the awakening task
- 15) # of times try_to_wake_up() attempted to move the awakening task
-
-Next two are wake_up_new_task() statistics:
- 16) # of times wake_up_new_task() was called
- 17) # of times wake_up_new_task() successfully moved the new task
-
-Next one is a sched_migrate_task() statistic:
- 18) # of times sched_migrate_task() was called
+Next three are schedule() statistics:
+ 5) # of times we switched to the expired queue and reused it
+ 6) # of times schedule() was called
+ 7) # of times schedule() left the processor idle
-Next one is a sched_balance_exec() statistic:
- 19) # of times sched_balance_exec() was called
+Next two are try_to_wake_up() statistics:
+ 8) # of times try_to_wake_up() was called
+ 9) # of times try_to_wake_up() was called to wake up the local cpu
Next three are statistics describing scheduling latency:
- 20) sum of all time spent running by tasks on this processor (in ms)
- 21) sum of all time spent waiting to run by tasks on this processor (in ms)
- 22) # of tasks (not necessarily unique) given to the processor
-
-The last six are statistics dealing with pull_task():
- 23) # of times pull_task() moved a task to this cpu when newly idle
- 24) # of times pull_task() stole a task from this cpu when another cpu
- was newly idle
- 25) # of times pull_task() moved a task to this cpu when idle
- 26) # of times pull_task() stole a task from this cpu when another cpu
- was idle
- 27) # of times pull_task() moved a task to this cpu when busy
- 28) # of times pull_task() stole a task from this cpu when another cpu
- was busy
+ 10) sum of all time spent running by tasks on this processor (in jiffies)
+ 11) sum of all time spent waiting to run by tasks on this processor (in
+ jiffies)
+ 12) # of timeslices run on this cpu
Domain statistics
CONFIG_SMP is not defined, *no* domains are utilized and these lines
will not appear in the output.)
-domain<N> 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
+domain<N> <cpumask> 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36
The first field is a bit mask indicating what cpus this domain operates over.
-The next fifteen are a variety of load_balance() statistics:
-
- 1) # of times in this domain load_balance() was called when the cpu
- was idle
- 2) # of times in this domain load_balance() was called when the cpu
- was busy
- 3) # of times in this domain load_balance() was called when the cpu
- was just becoming idle
- 4) # of times in this domain load_balance() tried to move one or more
- tasks and failed, when the cpu was idle
- 5) # of times in this domain load_balance() tried to move one or more
- tasks and failed, when the cpu was busy
- 6) # of times in this domain load_balance() tried to move one or more
- tasks and failed, when the cpu was just becoming idle
- 7) sum of imbalances discovered (if any) with each call to
- load_balance() in this domain when the cpu was idle
- 8) sum of imbalances discovered (if any) with each call to
- load_balance() in this domain when the cpu was busy
- 9) sum of imbalances discovered (if any) with each call to
- load_balance() in this domain when the cpu was just becoming idle
- 10) # of times in this domain load_balance() was called but did not find
- a busier queue while the cpu was idle
- 11) # of times in this domain load_balance() was called but did not find
- a busier queue while the cpu was busy
- 12) # of times in this domain load_balance() was called but did not find
- a busier queue while the cpu was just becoming idle
- 13) # of times in this domain a busier queue was found while the cpu was
- idle but no busier group was found
- 14) # of times in this domain a busier queue was found while the cpu was
- busy but no busier group was found
- 15) # of times in this domain a busier queue was found while the cpu was
- just becoming idle but no busier group was found
-
-Next two are sched_balance_exec() statistics:
- 17) # of times in this domain sched_balance_exec() successfully pushed
- a task to a new cpu
- 18) # of times in this domain sched_balance_exec() tried but failed to
- push a task to a new cpu
-
-Next two are try_to_wake_up() statistics:
- 19) # of times in this domain try_to_wake_up() tried to move a task based
- on affinity and cache warmth
- 20) # of times in this domain try_to_wake_up() tried to move a task based
- on load balancing
-
+The next 24 are a variety of load_balance() statistics in grouped into types
+of idleness (idle, busy, and newly idle):
+
+ 1) # of times in this domain load_balance() was called when the
+ cpu was idle
+ 2) # of times in this domain load_balance() checked but found
+ the load did not require balancing when the cpu was idle
+ 3) # of times in this domain load_balance() tried to move one or
+ more tasks and failed, when the cpu was idle
+ 4) sum of imbalances discovered (if any) with each call to
+ load_balance() in this domain when the cpu was idle
+ 5) # of times in this domain pull_task() was called when the cpu
+ was idle
+ 6) # of times in this domain pull_task() was called even though
+ the target task was cache-hot when idle
+ 7) # of times in this domain load_balance() was called but did
+ not find a busier queue while the cpu was idle
+ 8) # of times in this domain a busier queue was found while the
+ cpu was idle but no busier group was found
+
+ 9) # of times in this domain load_balance() was called when the
+ cpu was busy
+ 10) # of times in this domain load_balance() checked but found the
+ load did not require balancing when busy
+ 11) # of times in this domain load_balance() tried to move one or
+ more tasks and failed, when the cpu was busy
+ 12) sum of imbalances discovered (if any) with each call to
+ load_balance() in this domain when the cpu was busy
+ 13) # of times in this domain pull_task() was called when busy
+ 14) # of times in this domain pull_task() was called even though the
+ target task was cache-hot when busy
+ 15) # of times in this domain load_balance() was called but did not
+ find a busier queue while the cpu was busy
+ 16) # of times in this domain a busier queue was found while the cpu
+ was busy but no busier group was found
+
+ 17) # of times in this domain load_balance() was called when the
+ cpu was just becoming idle
+ 18) # of times in this domain load_balance() checked but found the
+ load did not require balancing when the cpu was just becoming idle
+ 19) # of times in this domain load_balance() tried to move one or more
+ tasks and failed, when the cpu was just becoming idle
+ 20) sum of imbalances discovered (if any) with each call to
+ load_balance() in this domain when the cpu was just becoming idle
+ 21) # of times in this domain pull_task() was called when newly idle
+ 22) # of times in this domain pull_task() was called even though the
+ target task was cache-hot when just becoming idle
+ 23) # of times in this domain load_balance() was called but did not
+ find a busier queue while the cpu was just becoming idle
+ 24) # of times in this domain a busier queue was found while the cpu
+ was just becoming idle but no busier group was found
+
+ Next three are active_load_balance() statistics:
+ 25) # of times active_load_balance() was called
+ 26) # of times active_load_balance() tried to move a task and failed
+ 27) # of times active_load_balance() successfully moved a task
+
+ Next three are sched_balance_exec() statistics:
+ 28) sbe_cnt is not used
+ 29) sbe_balanced is not used
+ 30) sbe_pushed is not used
+
+ Next three are sched_balance_fork() statistics:
+ 31) sbf_cnt is not used
+ 32) sbf_balanced is not used
+ 33) sbf_pushed is not used
+
+ Next three are try_to_wake_up() statistics:
+ 34) # of times in this domain try_to_wake_up() awoke a task that
+ last ran on a different cpu in this domain
+ 35) # of times in this domain try_to_wake_up() moved a task to the
+ waking cpu because it was cache-cold on its own cpu anyway
+ 36) # of times in this domain try_to_wake_up() started passive balancing
/proc/<pid>/schedstat
----------------
schedstats also adds a new /proc/<pid/schedstat file to include some of
the same information on a per-process level. There are three fields in
-this file correlating to fields 20, 21, and 22 in the CPU fields, but
-they only apply for that process.
+this file correlating for that process to:
+ 1) time spent on the cpu
+ 2) time spent waiting on a runqueue
+ 3) # of timeslices run on this cpu
A program could be easily written to make use of these extra fields to
report on how well a particular process or set of processes is faring
under the scheduler's policies. A simple version of such a program is
available at
- http://eaglet.rain.com/rick/linux/schedstat/v10/latency.c
+ http://eaglet.rain.com/rick/linux/schedstat/v12/latency.c
W: http://www.winischhofer.at/linuxsisusbvga.shtml
S: Maintained
+SLAB ALLOCATOR
+P: Christoph Lameter
+M: clameter@sgi.com
+P: Pekka Enberg
+M: penberg@cs.helsinki.fi
+L: linux-mm@kvack.org
+S: Maintained
+
SMC91x ETHERNET DRIVER
P: Nicolas Pitre
M: nico@cam.org
MODFLAGS = -DMODULE
CFLAGS_MODULE = $(MODFLAGS)
AFLAGS_MODULE = $(MODFLAGS)
-LDFLAGS_MODULE = -r
+LDFLAGS_MODULE =
CFLAGS_KERNEL =
AFLAGS_KERNEL =
#include <asm/system.h>
#include <asm/asm-offsets.h>
+.section .text.head, "ax"
.globl swapper_pg_dir
.globl _stext
swapper_pg_dir=SWAPPER_PGD
subsys_initcall(pcibios_init);
-char * __init
+char * __devinit
pcibios_setup(char *str)
{
return str;
#ifdef ALPHA_RESTORE_SRM_SETUP
static struct pdev_srm_saved_conf *srm_saved_configs;
-void __init
+void __devinit
pdev_save_srm_config(struct pci_dev *dev)
{
struct pdev_srm_saved_conf *tmp;
}
#endif
-void __init
+void __devinit
pcibios_fixup_resource(struct resource *res, struct resource *root)
{
res->start += root->start;
res->end += root->start;
}
-void __init
+void __devinit
pcibios_fixup_device_resources(struct pci_dev *dev, struct pci_bus *bus)
{
/* Update device resources. */
}
}
-void __init
+void __devinit
pcibios_fixup_bus(struct pci_bus *bus)
{
/* Propagate hose info into the subordinate devices. */
return max;
}
\f
-struct pci_iommu_arena *
+struct pci_iommu_arena * __init
iommu_arena_new_node(int nid, struct pci_controller *hose, dma_addr_t base,
unsigned long window_size, unsigned long align)
{
return arena;
}
-struct pci_iommu_arena *
+struct pci_iommu_arena * __init
iommu_arena_new(struct pci_controller *hose, dma_addr_t base,
unsigned long window_size, unsigned long align)
{
/*
* Bring one cpu online.
*/
-static int __devinit
+static int __cpuinit
smp_boot_one_cpu(int cpuid)
{
struct task_struct *idle;
{
}
-int __devinit
+int __cpuinit
__cpu_up(unsigned int cpu)
{
smp_boot_one_cpu(cpu);
set_irq_regs(old_regs);
}
-int __init
+int
setup_profiling_timer(unsigned int multiplier)
{
return -EINVAL;
_text = .; /* Text and read-only data */
.text : {
+ *(.text.head)
TEXT_TEXT
SCHED_TEXT
LOCK_TEXT
select ARCH_MTD_XIP
select GENERIC_GPIO
select GENERIC_TIME
+ select GENERIC_CLOCKEVENTS
help
Support for Intel's PXA2XX processor line.
/*
* not supported here
*/
-int __init setup_profiling_timer(unsigned int multiplier)
+int setup_profiling_timer(unsigned int multiplier)
{
return -EINVAL;
}
asmlinkage void do_unexp_fiq (struct pt_regs *regs)
{
-#ifndef CONFIG_IGNORE_FIQ
printk("Hmm. Unexpected FIQ received, but trying to continue\n");
printk("You may have a hardware problem...\n");
-#endif
}
/*
*
* HP Jornada720 init code
*
+ * Copyright (C) 2007 Kristoffer Ericson <Kristoffer.Ericson@gmail.com>
* Copyright (C) 2006 Filip Zyzniewski <filip.zyzniewski@tefnet.pl>
* Copyright (C) 2005 Michael Gernoth <michael@gernoth.net>
*
.resource = sa1111_resources,
};
-static struct platform_device jornada720_mcu_device = {
- .name = "jornada720_mcu",
- .id = -1,
+static struct platform_device jornada_ssp_device = {
+ .name = "jornada_ssp",
+ .id = -1,
};
static struct platform_device *devices[] __initdata = {
&sa1111_device,
- &jornada720_mcu_device,
+#ifdef CONFIG_SA1100_JORNADA720_SSP
+ &jornada_ssp_device,
+#endif
&s1d13xxxfb_device,
};
int ret = -ENODEV;
if (machine_is_jornada720()) {
- GPDR |= GPIO_GPIO20;
- /* oscillator setup (line 116 of HP's doc) */
+ /* we want to use gpio20 as input to drive the clock of our uart 3 */
+ GPDR |= GPIO_GPIO20; /* Clear gpio20 pin as input */
TUCR = TUCR_VAL;
- /* resetting SA1111 (line 118 of HP's doc) */
- GPSR = GPIO_GPIO20;
+ GPSR = GPIO_GPIO20; /* start gpio20 pin */
udelay(1);
- GPCR = GPIO_GPIO20;
+ GPCR = GPIO_GPIO20; /* stop gpio20 */
udelay(1);
- GPSR = GPIO_GPIO20;
- udelay(20);
+ GPSR = GPIO_GPIO20; /* restart gpio20 */
+ udelay(20); /* give it some time to restart */
ret = platform_add_devices(devices, ARRAY_SIZE(devices));
}
+
return ret;
}
}
MACHINE_START(JORNADA720, "HP Jornada 720")
- /* Maintainer: Michael Gernoth <michael@gernoth.net> */
+ /* Maintainer: Kristoffer Ericson <Kristoffer.Ericson@gmail.com> */
.phys_io = 0x80000000,
.io_pg_offst = ((0xf8000000) >> 18) & 0xfffc,
.boot_params = 0xc0000100,
ret = jornada_ssp_inout(GETBRIGHTNESS);
/* seems like it worked, just feed it with TxDummy to get rid of data */
- if (ret == TxDummy)
+ if (ret == TXDUMMY)
jornada_ssp_inout(TXDUMMY);
jornada_ssp_end();
/*
* Mailbox interrupt handler
*/
-static void mbox_txq_fn(request_queue_t * q)
+static void mbox_txq_fn(struct request_queue * q)
{
}
-static void mbox_rxq_fn(request_queue_t * q)
+static void mbox_rxq_fn(struct request_queue * q)
{
}
{
struct request *rq;
mbox_msg_t msg;
- request_queue_t *q = mbox->rxq->queue;
+ struct request_queue *q = mbox->rxq->queue;
disable_mbox_irq(mbox, IRQ_RX);
request_fn_proc * proc,
void (*work) (struct work_struct *))
{
- request_queue_t *q;
+ struct request_queue *q;
struct omap_mbox_queue *mq;
mq = kzalloc(sizeof(struct omap_mbox_queue), GFP_KERNEL);
if (bx != 0x504d) /* "PM" signature */
return -1;
- if (cx & 0x02) /* 32 bits supported? */
+ if (!(cx & 0x02)) /* 32 bits supported? */
return -1;
/* Disconnect first, just in case */
ax = 0x5304;
+ bx = 0;
asm volatile("pushl %%ebp ; int $0x15 ; popl %%ebp"
- : "+a" (ax)
- : : "ebx", "ecx", "edx", "esi", "edi");
+ : "+a" (ax), "+b" (bx)
+ : : "ecx", "edx", "esi", "edi");
/* Paranoia */
ebx = esi = 0;
}
/*
- * Get Intel SpeedStep IST information.
+ * Get Intel SpeedStep (IST) information.
*/
-static void query_speedstep_ist(void)
+static void query_ist(void)
{
asm("int $0x15"
- : "=a" (boot_params.speedstep_info[0]),
- "=b" (boot_params.speedstep_info[1]),
- "=c" (boot_params.speedstep_info[2]),
- "=d" (boot_params.speedstep_info[3])
+ : "=a" (boot_params.ist_info.signature),
+ "=b" (boot_params.ist_info.command),
+ "=c" (boot_params.ist_info.event),
+ "=d" (boot_params.ist_info.perf_level)
: "a" (0x0000e980), /* IST Support */
"d" (0x47534943)); /* Request value */
}
query_voyager();
#endif
- /* Query SpeedStep IST information */
- query_speedstep_ist();
+ /* Query Intel SpeedStep (IST) information */
+ query_ist();
/* Query APM information */
#if defined(CONFIG_APM) || defined(CONFIG_APM_MODULE)
ifneq ($(CONFIG_PCI),)
obj-$(CONFIG_X86_IO_APIC) += earlyquirk.o
endif
-obj-$(CONFIG_ACPI_SLEEP) += sleep.o wakeup.o
+obj-$(CONFIG_ACPI) += sleep.o wakeup.o
ifneq ($(CONFIG_ACPI_PROCESSOR),)
obj-y += cstate.o processor.o
* And on the local CPU you need to be protected again NMI or MCE handlers
* seeing an inconsistent instruction while you patch.
*/
-void __kprobes text_poke(void *oaddr, unsigned char *opcode, int len)
+void __kprobes text_poke(void *addr, unsigned char *opcode, int len)
{
- u8 *addr = oaddr;
- if (!pte_write(*lookup_address((unsigned long)addr))) {
- struct page *p[2] = { virt_to_page(addr), virt_to_page(addr+PAGE_SIZE) };
- addr = vmap(p, 2, VM_MAP, PAGE_KERNEL);
- if (!addr)
- return;
- addr += ((unsigned long)oaddr) % PAGE_SIZE;
- }
memcpy(addr, opcode, len);
sync_core();
/* Not strictly needed, but can speed CPU recovery up. Ignore cross cacheline
case. */
if (cpu_has_clflush)
- asm("clflush (%0) " :: "r" (oaddr) : "memory");
- if (addr != oaddr)
- vunmap(addr);
+ asm("clflush (%0) " :: "r" (addr) : "memory");
}
config X86_POWERNOW_K8_ACPI
bool "ACPI Support"
select ACPI_PROCESSOR
- depends on X86_POWERNOW_K8
+ depends on ACPI && X86_POWERNOW_K8
default y
help
This provides access to the K8s Processor Performance States via ACPI.
*/
reserve_bootmem(PAGE_SIZE, PAGE_SIZE);
#endif
-#ifdef CONFIG_ACPI_SLEEP
+#ifdef CONFIG_ACPI
/*
* Reserve low memory region for sleep support.
*/
paravirt_pagetable_setup_done(pgd_base);
}
-#if defined(CONFIG_SOFTWARE_SUSPEND) || defined(CONFIG_ACPI_SLEEP)
+#if defined(CONFIG_SOFTWARE_SUSPEND) || defined(CONFIG_ACPI)
/*
* Swap suspend & friends need this for resume because things like the intel-agp
* driver might have split up a kernel 4MB mapping.
unsigned long start = PFN_ALIGN(_text);
unsigned long size = PFN_ALIGN(_etext) - start;
- change_page_attr(virt_to_page(start),
- size >> PAGE_SHIFT, PAGE_KERNEL_RX);
- printk("Write protecting the kernel text: %luk\n", size >> 10);
+#ifndef CONFIG_KPROBES
+#ifdef CONFIG_HOTPLUG_CPU
+ /* It must still be possible to apply SMP alternatives. */
+ if (num_possible_cpus() <= 1)
+#endif
+ {
+ change_page_attr(virt_to_page(start),
+ size >> PAGE_SHIFT, PAGE_KERNEL_RX);
+ printk("Write protecting the kernel text: %luk\n", size >> 10);
+ }
+#endif
start += size;
size = (unsigned long)__end_rodata - start;
change_page_attr(virt_to_page(start),
depends on IA32_SUPPORT
default y
+config COMPAT_FOR_U64_ALIGNMENT
+ def_bool COMPAT
+
config IA64_MCA_RECOVERY
tristate "MCA recovery from errors other than TLB."
return 0;
}
+static const struct acpi_device_id hp_ioc_iommu_device_ids[] = {
+ {"HWP0001", 0},
+ {"HWP0004", 0},
+ {"", 0},
+};
static struct acpi_driver acpi_sba_ioc_driver = {
.name = "IOC IOMMU Driver",
- .ids = "HWP0001,HWP0004",
+ .ids = hp_ioc_iommu_device_ids,
.ops = {
.add = acpi_sba_ioc_add,
},
{
struct scsi_cmnd *sc;
- while ((sc = queue[rd].sc) != 0) {
+ while ((sc = queue[rd].sc) != NULL) {
atomic_dec(&num_reqs);
queue[rd].sc = NULL;
if (DBG)
#if PAGE_SHIFT > IA32_PAGE_SHIFT
{
- extern struct kmem_cache *partial_page_cachep;
+ extern struct kmem_cache *ia64_partial_page_cachep;
- partial_page_cachep = kmem_cache_create("partial_page_cache",
- sizeof(struct partial_page),
- 0, SLAB_PANIC, NULL);
+ ia64_partial_page_cachep = kmem_cache_create("ia64_partial_page_cache",
+ sizeof(struct ia64_partial_page),
+ 0, SLAB_PANIC, NULL);
}
#endif
return 0;
* partially mapped pages provide precise accounting of which 4k sub pages
* are mapped and which ones are not, thereby improving IA-32 compatibility.
*/
-struct partial_page {
- struct partial_page *next; /* linked list, sorted by address */
+struct ia64_partial_page {
+ struct ia64_partial_page *next; /* linked list, sorted by address */
struct rb_node pp_rb;
/* 64K is the largest "normal" page supported by ia64 ABI. So 4K*64
* should suffice.*/
unsigned int base;
};
-struct partial_page_list {
- struct partial_page *pp_head; /* list head, points to the lowest
+struct ia64_partial_page_list {
+ struct ia64_partial_page *pp_head; /* list head, points to the lowest
* addressed partial page */
struct rb_root ppl_rb;
- struct partial_page *pp_hint; /* pp_hint->next is the last
+ struct ia64_partial_page *pp_hint; /* pp_hint->next is the last
* accessed partial page */
atomic_t pp_count; /* reference count */
};
#if PAGE_SHIFT > IA32_PAGE_SHIFT
-struct partial_page_list* ia32_init_pp_list (void);
+struct ia64_partial_page_list* ia32_init_pp_list (void);
#else
# define ia32_init_pp_list() 0
#endif
return ret;
}
-/* SLAB cache for partial_page structures */
-struct kmem_cache *partial_page_cachep;
+/* SLAB cache for ia64_partial_page structures */
+struct kmem_cache *ia64_partial_page_cachep;
/*
- * init partial_page_list.
+ * init ia64_partial_page_list.
* return 0 means kmalloc fail.
*/
-struct partial_page_list*
+struct ia64_partial_page_list*
ia32_init_pp_list(void)
{
- struct partial_page_list *p;
+ struct ia64_partial_page_list *p;
if ((p = kmalloc(sizeof(*p), GFP_KERNEL)) == NULL)
return p;
* Else, return 0 and provide @pprev, @rb_link, @rb_parent to
* be used by later __ia32_insert_pp().
*/
-static struct partial_page *
-__ia32_find_pp(struct partial_page_list *ppl, unsigned int start,
- struct partial_page **pprev, struct rb_node ***rb_link,
+static struct ia64_partial_page *
+__ia32_find_pp(struct ia64_partial_page_list *ppl, unsigned int start,
+ struct ia64_partial_page **pprev, struct rb_node ***rb_link,
struct rb_node **rb_parent)
{
- struct partial_page *pp;
+ struct ia64_partial_page *pp;
struct rb_node **__rb_link, *__rb_parent, *rb_prev;
pp = ppl->pp_hint;
while (*__rb_link) {
__rb_parent = *__rb_link;
- pp = rb_entry(__rb_parent, struct partial_page, pp_rb);
+ pp = rb_entry(__rb_parent, struct ia64_partial_page, pp_rb);
if (pp->base == start) {
ppl->pp_hint = pp;
*rb_parent = __rb_parent;
*pprev = NULL;
if (rb_prev)
- *pprev = rb_entry(rb_prev, struct partial_page, pp_rb);
+ *pprev = rb_entry(rb_prev, struct ia64_partial_page, pp_rb);
return NULL;
}
* insert @pp into @ppl.
*/
static void
-__ia32_insert_pp(struct partial_page_list *ppl, struct partial_page *pp,
- struct partial_page *prev, struct rb_node **rb_link,
- struct rb_node *rb_parent)
+__ia32_insert_pp(struct ia64_partial_page_list *ppl,
+ struct ia64_partial_page *pp, struct ia64_partial_page *prev,
+ struct rb_node **rb_link, struct rb_node *rb_parent)
{
/* link list */
if (prev) {
ppl->pp_head = pp;
if (rb_parent)
pp->next = rb_entry(rb_parent,
- struct partial_page, pp_rb);
+ struct ia64_partial_page, pp_rb);
else
pp->next = NULL;
}
* delete @pp from partial page list @ppl.
*/
static void
-__ia32_delete_pp(struct partial_page_list *ppl, struct partial_page *pp,
- struct partial_page *prev)
+__ia32_delete_pp(struct ia64_partial_page_list *ppl,
+ struct ia64_partial_page *pp, struct ia64_partial_page *prev)
{
if (prev) {
prev->next = pp->next;
ppl->pp_hint = pp->next;
}
rb_erase(&pp->pp_rb, &ppl->ppl_rb);
- kmem_cache_free(partial_page_cachep, pp);
+ kmem_cache_free(ia64_partial_page_cachep, pp);
}
-static struct partial_page *
-__pp_prev(struct partial_page *pp)
+static struct ia64_partial_page *
+__pp_prev(struct ia64_partial_page *pp)
{
struct rb_node *prev = rb_prev(&pp->pp_rb);
if (prev)
- return rb_entry(prev, struct partial_page, pp_rb);
+ return rb_entry(prev, struct ia64_partial_page, pp_rb);
else
return NULL;
}
static void
__ia32_delete_pp_range(unsigned int start, unsigned int end)
{
- struct partial_page *pp, *prev;
+ struct ia64_partial_page *pp, *prev;
struct rb_node **rb_link, *rb_parent;
if (start >= end)
}
while (pp && pp->base < end) {
- struct partial_page *tmp = pp->next;
+ struct ia64_partial_page *tmp = pp->next;
__ia32_delete_pp(current->thread.ppl, pp, prev);
pp = tmp;
}
static int
__ia32_set_pp(unsigned int start, unsigned int end, int flags)
{
- struct partial_page *pp, *prev;
+ struct ia64_partial_page *pp, *prev;
struct rb_node ** rb_link, *rb_parent;
unsigned int pstart, start_bit, end_bit, i;
return 0;
}
- /* new a partial_page */
- pp = kmem_cache_alloc(partial_page_cachep, GFP_KERNEL);
+ /* new a ia64_partial_page */
+ pp = kmem_cache_alloc(ia64_partial_page_cachep, GFP_KERNEL);
if (!pp)
return -ENOMEM;
pp->base = pstart;
static int
__ia32_unset_pp(unsigned int start, unsigned int end)
{
- struct partial_page *pp, *prev;
+ struct ia64_partial_page *pp, *prev;
struct rb_node ** rb_link, *rb_parent;
unsigned int pstart, start_bit, end_bit, i;
struct vm_area_struct *vma;
return -ENOMEM;
}
- /* new a partial_page */
- pp = kmem_cache_alloc(partial_page_cachep, GFP_KERNEL);
+ /* new a ia64_partial_page */
+ pp = kmem_cache_alloc(ia64_partial_page_cachep, GFP_KERNEL);
if (!pp)
return -ENOMEM;
pp->base = pstart;
static int
__ia32_compare_pp(unsigned int start, unsigned int end)
{
- struct partial_page *pp, *prev;
+ struct ia64_partial_page *pp, *prev;
struct rb_node ** rb_link, *rb_parent;
unsigned int pstart, start_bit, end_bit, size;
unsigned int first_bit, next_zero_bit; /* the first range in bitmap */
}
static void
-__ia32_drop_pp_list(struct partial_page_list *ppl)
+__ia32_drop_pp_list(struct ia64_partial_page_list *ppl)
{
- struct partial_page *pp = ppl->pp_head;
+ struct ia64_partial_page *pp = ppl->pp_head;
while (pp) {
- struct partial_page *next = pp->next;
- kmem_cache_free(partial_page_cachep, pp);
+ struct ia64_partial_page *next = pp->next;
+ kmem_cache_free(ia64_partial_page_cachep, pp);
pp = next;
}
}
void
-ia32_drop_partial_page_list(struct task_struct *task)
+ia32_drop_ia64_partial_page_list(struct task_struct *task)
{
- struct partial_page_list* ppl = task->thread.ppl;
+ struct ia64_partial_page_list* ppl = task->thread.ppl;
if (ppl && atomic_dec_and_test(&ppl->pp_count))
__ia32_drop_pp_list(ppl);
* Copy current->thread.ppl to ppl (already initialized).
*/
static int
-__ia32_copy_pp_list(struct partial_page_list *ppl)
+__ia32_copy_pp_list(struct ia64_partial_page_list *ppl)
{
- struct partial_page *pp, *tmp, *prev;
+ struct ia64_partial_page *pp, *tmp, *prev;
struct rb_node **rb_link, *rb_parent;
ppl->pp_head = NULL;
prev = NULL;
for (pp = current->thread.ppl->pp_head; pp; pp = pp->next) {
- tmp = kmem_cache_alloc(partial_page_cachep, GFP_KERNEL);
+ tmp = kmem_cache_alloc(ia64_partial_page_cachep, GFP_KERNEL);
if (!tmp)
return -ENOMEM;
*tmp = *pp;
}
int
-ia32_copy_partial_page_list(struct task_struct *p, unsigned long clone_flags)
+ia32_copy_ia64_partial_page_list(struct task_struct *p,
+ unsigned long clone_flags)
{
int retval = 0;
unsigned int acpi_cpei_override;
unsigned int acpi_cpei_phys_cpuid;
+unsigned long acpi_wakeup_address = 0;
+
const char __init *
acpi_get_sysname(void)
{
int acpi_gsi_to_irq(u32 gsi, unsigned int *irq)
{
- int vector;
+ int tmp;
if (has_8259 && gsi < 16)
*irq = isa_irq_to_vector(gsi);
else {
- vector = gsi_to_vector(gsi);
- if (vector == -1)
+ tmp = gsi_to_irq(gsi);
+ if (tmp == -1)
return -1;
-
- *irq = vector;
+ *irq = tmp;
}
return 0;
}
EXPORT_SYMBOL(acpi_unregister_ioapic);
+/*
+ * acpi_save_state_mem() - save kernel state
+ *
+ * TBD when when IA64 starts to support suspend...
+ */
+int acpi_save_state_mem(void) { return 0; }
+
+/*
+ * acpi_restore_state()
+ */
+void acpi_restore_state_mem(void) {}
+
+/*
+ * do_suspend_lowlevel()
+ */
+void do_suspend_lowlevel(void) {}
+
#endif /* CONFIG_ACPI */
int __init init_cyclone_clock(void)
{
- u64* reg;
+ u64 __iomem *reg;
u64 base; /* saved cyclone base address */
u64 offset; /* offset from pageaddr to cyclone_timer register */
int i;
- u32* volatile cyclone_timer; /* Cyclone MPMC0 register */
+ u32 __iomem *cyclone_timer; /* Cyclone MPMC0 register */
if (!use_cyclone)
return 0;
/* find base address */
offset = (CYCLONE_CBAR_ADDR);
- reg = (u64*)ioremap_nocache(offset, sizeof(u64));
+ reg = ioremap_nocache(offset, sizeof(u64));
if(!reg){
printk(KERN_ERR "Summit chipset: Could not find valid CBAR"
" register.\n");
/* setup PMCC */
offset = (base + CYCLONE_PMCC_OFFSET);
- reg = (u64*)ioremap_nocache(offset, sizeof(u64));
+ reg = ioremap_nocache(offset, sizeof(u64));
if(!reg){
printk(KERN_ERR "Summit chipset: Could not find valid PMCC"
" register.\n");
/* setup MPCS */
offset = (base + CYCLONE_MPCS_OFFSET);
- reg = (u64*)ioremap_nocache(offset, sizeof(u64));
+ reg = ioremap_nocache(offset, sizeof(u64));
if(!reg){
printk(KERN_ERR "Summit chipset: Could not find valid MPCS"
" register.\n");
/* map in cyclone_timer */
offset = (base + CYCLONE_MPMC_OFFSET);
- cyclone_timer = (u32*)ioremap_nocache(offset, sizeof(u32));
+ cyclone_timer = ioremap_nocache(offset, sizeof(u32));
if(!cyclone_timer){
printk(KERN_ERR "Summit chipset: Could not find valid MPMC"
" register.\n");
printk(KERN_ERR "Summit chipset: Counter not counting!"
" DISABLED\n");
iounmap(cyclone_timer);
- cyclone_timer = 0;
+ cyclone_timer = NULL;
use_cyclone = 0;
return -ENODEV;
}
halt_msg:
stringz "Halting kernel\n"
- .text
+ .section .text.head,"ax"
.global start_ap
br.sptk.many self // endless loop
END(_start)
+ .text
+
GLOBAL_ENTRY(ia64_save_debug_regs)
alloc r16=ar.pfs,1,0,0,0
mov r20=ar.lc // preserve ar.lc
[0 ... IA64_NUM_VECTORS - 1] = IA64_SPURIOUS_INT_VECTOR
};
-static cpumask_t vector_table[IA64_MAX_DEVICE_VECTORS] = {
- [0 ... IA64_MAX_DEVICE_VECTORS - 1] = CPU_MASK_NONE
+static cpumask_t vector_table[IA64_NUM_VECTORS] = {
+ [0 ... IA64_NUM_VECTORS - 1] = CPU_MASK_NONE
};
static int irq_status[NR_IRQS] = {
static inline int find_unassigned_vector(cpumask_t domain)
{
cpumask_t mask;
- int pos;
+ int pos, vector;
cpus_and(mask, domain, cpu_online_map);
if (cpus_empty(mask))
return -EINVAL;
for (pos = 0; pos < IA64_NUM_DEVICE_VECTORS; pos++) {
- cpus_and(mask, domain, vector_table[pos]);
+ vector = IA64_FIRST_DEVICE_VECTOR + pos;
+ cpus_and(mask, domain, vector_table[vector]);
if (!cpus_empty(mask))
continue;
- return IA64_FIRST_DEVICE_VECTOR + pos;
+ return vector;
}
return -ENOSPC;
}
static int __bind_irq_vector(int irq, int vector, cpumask_t domain)
{
cpumask_t mask;
- int cpu, pos;
+ int cpu;
struct irq_cfg *cfg = &irq_cfg[irq];
+ BUG_ON((unsigned)irq >= NR_IRQS);
+ BUG_ON((unsigned)vector >= IA64_NUM_VECTORS);
+
cpus_and(mask, domain, cpu_online_map);
if (cpus_empty(mask))
return -EINVAL;
cfg->vector = vector;
cfg->domain = domain;
irq_status[irq] = IRQ_USED;
- pos = vector - IA64_FIRST_DEVICE_VECTOR;
- cpus_or(vector_table[pos], vector_table[pos], domain);
+ cpus_or(vector_table[vector], vector_table[vector], domain);
return 0;
}
static void __clear_irq_vector(int irq)
{
- int vector, cpu, pos;
+ int vector, cpu;
cpumask_t mask;
cpumask_t domain;
struct irq_cfg *cfg = &irq_cfg[irq];
cfg->vector = IRQ_VECTOR_UNASSIGNED;
cfg->domain = CPU_MASK_NONE;
irq_status[irq] = IRQ_UNUSED;
- pos = vector - IA64_FIRST_DEVICE_VECTOR;
- cpus_andnot(vector_table[pos], vector_table[pos], domain);
+ cpus_andnot(vector_table[vector], vector_table[vector], domain);
}
static void clear_irq_vector(int irq)
vector = -ENOSPC;
spin_lock_irqsave(&vector_lock, flags);
- if (irq < 0) {
- goto out;
- }
for_each_online_cpu(cpu) {
domain = vector_allocation_domain(cpu);
vector = find_unassigned_vector(domain);
}
if (vector < 0)
goto out;
+ if (irq == AUTO_ASSIGN)
+ irq = vector;
BUG_ON(__bind_irq_vector(irq, vector, domain));
out:
spin_unlock_irqrestore(&vector_lock, flags);
vector_domain_type = VECTOR_DOMAIN_PERCPU;
no_int_routing = 1;
}
- return 1;
+ return 0;
}
early_param("vector", parse_vector_domain);
#else
struct ia64_machine_vector ia64_mv;
EXPORT_SYMBOL(ia64_mv);
-static __initdata const char *mvec_name;
-static __init int setup_mvec(char *s)
-{
- mvec_name = s;
- return 0;
-}
-early_param("machvec", setup_mvec);
-
static struct ia64_machine_vector * __init
lookup_machvec (const char *name)
{
struct ia64_machine_vector *mv;
if (!name)
- name = mvec_name ? mvec_name : acpi_get_sysname();
+ name = acpi_get_sysname();
mv = lookup_machvec(name);
if (!mv)
panic("generic kernel failed to find machine vector for"
printk(KERN_INFO "booting generic kernel on platform %s\n", name);
}
+void __init
+machvec_init_from_cmdline(const char *cmdline)
+{
+ char str[64];
+ const char *start;
+ char *end;
+
+ if (! (start = strstr(cmdline, "machvec=")) )
+ return machvec_init(NULL);
+
+ strlcpy(str, start + strlen("machvec="), sizeof(str));
+ if ( (end = strchr(str, ' ')) )
+ *end = '\0';
+
+ return machvec_init(str);
+}
+
#endif /* CONFIG_IA64_GENERIC */
void
/* Copy partially mapped page list */
if (!retval)
- retval = ia32_copy_partial_page_list(p, clone_flags);
+ retval = ia32_copy_ia64_partial_page_list(p,
+ clone_flags);
}
#endif
ia64_drop_fpu(current);
#ifdef CONFIG_IA32_SUPPORT
if (IS_IA32_PROCESS(task_pt_regs(current))) {
- ia32_drop_partial_page_list(current);
+ ia32_drop_ia64_partial_page_list(current);
current->thread.task_size = IA32_PAGE_OFFSET;
set_fs(USER_DS);
}
pfm_release_debug_registers(current);
#endif
if (IS_IA32_PROCESS(task_pt_regs(current)))
- ia32_drop_partial_page_list(current);
+ ia32_drop_ia64_partial_page_list(current);
}
unsigned long
efi_init();
io_port_init();
- parse_early_param();
-
#ifdef CONFIG_IA64_GENERIC
- machvec_init(NULL);
+ /* machvec needs to be parsed from the command line
+ * before parse_early_param() is called to ensure
+ * that ia64_mv is initialised before any command line
+ * settings may cause console setup to occur
+ */
+ machvec_init_from_cmdline(*cmdline_p);
#endif
+ parse_early_param();
+
if (early_console_setup(*cmdline_p) == 0)
mark_bsp_online();
send_IPI_allbutself(IPI_CPU_STOP);
}
-int __init
+int
setup_profiling_timer (unsigned int multiplier)
{
return -EINVAL;
int cpu;
};
-void
+void __cpuinit
do_fork_idle(struct work_struct *work)
{
struct create_idle *c_idle =
complete(&c_idle->done);
}
-static int __devinit
+static int __cpuinit
do_boot_cpu (int sapicid, int cpu)
{
int timeout;
}
}
-int __devinit
+int __cpuinit
__cpu_up (unsigned int cpu)
{
int ret;
.name = "itc",
.rating = 350,
.read = itc_get_cycles,
- .mask = 0xffffffffffffffff,
+ .mask = CLOCKSOURCE_MASK(64),
.mult = 0, /*to be caluclated*/
.shift = 16,
.flags = CLOCK_SOURCE_IS_CONTINUOUS,
}
}
-static cycle_t itc_get_cycles()
+static cycle_t itc_get_cycles(void)
{
u64 lcycle, now, ret;
KPROBES_TEXT
*(.gnu.linkonce.t*)
}
+ .text.head : AT(ADDR(.text.head) - LOAD_OFFSET)
+ { *(.text.head) }
.text2 : AT(ADDR(.text2) - LOAD_OFFSET)
{ *(.text2) }
#ifdef CONFIG_SMP
/*
* PCI BIOS setup, always defaults to SAL interface
*/
-char * __init
+char * __devinit
pcibios_setup (char *str)
{
return str;
static void end_mappi_irq(unsigned int irq)
{
- enable_mappi_irq(irq);
+ if (!(irq_desc[irq].status & (IRQ_DISABLED | IRQ_INPROGRESS)))
+ enable_mappi_irq(irq);
}
static unsigned int startup_mappi_irq(unsigned int irq)
irq_desc[M32R_IRQ_INT0].chip = &mappi_irq_type;
irq_desc[M32R_IRQ_INT0].action = NULL;
irq_desc[M32R_IRQ_INT0].depth = 1;
- icu_data[M32R_IRQ_INT0].icucr = M32R_ICUCR_IEN|M32R_ICUCR_ISMOD10;
+ icu_data[M32R_IRQ_INT0].icucr = M32R_ICUCR_IEN|M32R_ICUCR_ISMOD11;
disable_mappi_irq(M32R_IRQ_INT0);
#endif /* CONFIG_M32R_NE2000 */
help
Support the bugs of Xcopilot.
+config UC5272
+ bool 'Arcturus Networks uC5272 dimm board support'
+ depends on M5272
+ help
+ Support for the Arcturus Networks uC5272 dimm board.
+
+config UC5282
+ bool "Arcturus Networks uC5282 board support"
+ depends on M528x
+ help
+ Support for the Arcturus Networks uC5282 dimm board.
+
config UCSIMM
bool "uCsimm module support"
depends on M68EZ328
depends on M528x
help
Support for the EMAC.Inc SOM5282EM module.
+
+config WILDFIRE
+ bool "Intec Automation Inc. WildFire board support"
+ depends on M528x
+ help
+ Support for the Intec Automation Inc. WildFire.
+
+config WILDFIREMOD
+ bool "Intec Automation Inc. WildFire module support"
+ depends on M528x
+ help
+ Support for the Intec Automation Inc. WildFire module.
config ARN5307
bool "Arnewsh 5307 board support"
PLATFORM := $(platform-y)
board-$(CONFIG_PILOT) := pilot
+board-$(CONFIG_UC5272) := UC5272
+board-$(CONFIG_UC5282) := UC5282
board-$(CONFIG_UCSIMM) := ucsimm
board-$(CONFIG_UCDIMM) := ucdimm
board-$(CONFIG_UCQUICC) := uCquicc
#include <linux/types.h>
#include <linux/mm.h>
#include <linux/string.h>
+#include <linux/device.h>
#include <asm/io.h>
void *dma_alloc_coherent(struct device *dev, size_t size,
char __initdata command_line[COMMAND_LINE_SIZE];
-void (*mach_trap_init)(void);
-
/* machine dependent timer functions */
void (*mach_sched_init)(irq_handler_t handler);
void (*mach_tick)(void);
config_BSP(&command_line[0], sizeof(command_line));
+#if defined(CONFIG_BOOTPARAM)
+ strncpy(&command_line[0], CONFIG_BOOTPARAM_STRING, sizeof(command_line));
+ command_line[sizeof(command_line) - 1] = 0;
+#endif
+
printk(KERN_INFO "\x0F\r\n\nuClinux/" CPU "\n");
#ifdef CONFIG_UCDIMM
void coldfire_tick(void);
void coldfire_timer_init(irq_handler_t handler);
unsigned long coldfire_timer_offset(void);
-void coldfire_trap_init(void);
void coldfire_reset(void);
/***************************************************************************/
void config_BSP(char *commandp, int size)
{
mcf_setimr(MCFSIM_IMR_MASKALL);
-
-#if defined(CONFIG_BOOTPARAM)
- strncpy(commandp, CONFIG_BOOTPARAM_STRING, size);
- commandp[size-1] = 0;
-#else
- memset(commandp, 0, size);
-#endif
-
mach_sched_init = coldfire_timer_init;
mach_tick = coldfire_tick;
mach_gettimeoffset = coldfire_timer_offset;
- mach_trap_init = coldfire_trap_init;
mach_reset = coldfire_reset;
}
void coldfire_tick(void);
void coldfire_timer_init(irq_handler_t handler);
unsigned long coldfire_timer_offset(void);
-void coldfire_trap_init(void);
void coldfire_reset(void);
/***************************************************************************/
{
mcf_setimr(MCFSIM_IMR_MASKALL);
-#if defined(CONFIG_BOOTPARAM)
- strncpy(commandp, CONFIG_BOOTPARAM_STRING, size);
- commandp[size-1] = 0;
-#elif defined(CONFIG_NETtel)
+#if defined(CONFIG_NETtel)
/* Copy command line from FLASH to local buffer... */
memcpy(commandp, (char *) 0xf0004000, size);
commandp[size-1] = 0;
-#else
- memset(commandp, 0, size);
#endif /* CONFIG_NETtel */
mach_sched_init = coldfire_timer_init;
mach_tick = coldfire_tick;
mach_gettimeoffset = coldfire_timer_offset;
- mach_trap_init = coldfire_trap_init;
mach_reset = coldfire_reset;
}
void coldfire_pit_tick(void);
void coldfire_pit_init(irq_handler_t handler);
unsigned long coldfire_pit_offset(void);
-void coldfire_trap_init(void);
void coldfire_reset(void);
/***************************************************************************/
void config_BSP(char *commandp, int size)
{
-#ifdef CONFIG_BOOTPARAM
- strncpy(commandp, CONFIG_BOOTPARAM_STRING, size);
- commandp[size-1] = 0;
-#else
- memset(commandp, 0, size);
-#endif
-
mach_sched_init = coldfire_pit_init;
mach_tick = coldfire_pit_tick;
mach_gettimeoffset = coldfire_pit_offset;
- mach_trap_init = coldfire_trap_init;
mach_reset = coldfire_reset;
}
void coldfire_pit_tick(void);
void coldfire_pit_init(irq_handler_t handler);
unsigned long coldfire_pit_offset(void);
-void coldfire_trap_init(void);
void coldfire_reset(void);
/***************************************************************************/
void config_BSP(char *commandp, int size)
{
mcf_disableall();
-
-#ifdef CONFIG_BOOTPARAM
- strncpy(commandp, CONFIG_BOOTPARAM_STRING, size);
- commandp[size-1] = 0;
-#else
- memset(commandp, 0, size);
-#endif
-
mach_sched_init = coldfire_pit_init;
mach_tick = coldfire_pit_tick;
mach_gettimeoffset = coldfire_pit_offset;
- mach_trap_init = coldfire_trap_init;
mach_reset = coldfire_reset;
}
void coldfire_tick(void);
void coldfire_timer_init(irq_handler_t handler);
unsigned long coldfire_timer_offset(void);
-void coldfire_trap_init(void);
void coldfire_reset(void);
/***************************************************************************/
void config_BSP(char *commandp, int size)
{
mcf_setimr(MCFSIM_IMR_MASKALL);
-
-#if defined(CONFIG_BOOTPARAM)
- strncpy(commandp, CONFIG_BOOTPARAM_STRING, size);
- commandp[size-1] = 0;
-#else
- memset(commandp, 0, size);
-#endif
-
mach_sched_init = coldfire_timer_init;
mach_tick = coldfire_tick;
mach_gettimeoffset = coldfire_timer_offset;
- mach_trap_init = coldfire_trap_init;
mach_reset = coldfire_reset;
}
void coldfire_tick(void);
void coldfire_timer_init(irq_handler_t handler);
unsigned long coldfire_timer_offset(void);
-void coldfire_trap_init(void);
void coldfire_reset(void);
extern unsigned int mcf_timervector;
mcf_disableall();
-#if defined(CONFIG_BOOTPARAM)
- strncpy(commandp, CONFIG_BOOTPARAM_STRING, size);
- commandp[size-1] = 0;
-#elif defined(CONFIG_NETtel) || defined(CONFIG_SCALES)
+#if defined(CONFIG_NETtel) || defined(CONFIG_SCALES)
/* Copy command line from FLASH to local buffer... */
memcpy(commandp, (char *) 0xf0004000, size);
commandp[size-1] = 0;
/* Copy command line from FLASH to local buffer... */
memcpy(commandp, (char *) 0xf0010000, size);
commandp[size-1] = 0;
-#else
- memset(commandp, 0, size);
#endif
mcf_timervector = 69;
mach_sched_init = coldfire_timer_init;
mach_tick = coldfire_tick;
mach_gettimeoffset = coldfire_timer_offset;
- mach_trap_init = coldfire_trap_init;
mach_reset = coldfire_reset;
}
void coldfire_pit_tick(void);
void coldfire_pit_init(irq_handler_t handler);
unsigned long coldfire_pit_offset(void);
-void coldfire_trap_init(void);
void coldfire_reset(void);
/***************************************************************************/
void config_BSP(char *commandp, int size)
{
mcf_disableall();
-
-#ifdef CONFIG_BOOTPARAM
- strncpy(commandp, CONFIG_BOOTPARAM_STRING, size);
- commandp[size-1] = 0;
-#else
- memset(commandp, 0, size);
-#endif
-
mach_sched_init = coldfire_pit_init;
mach_tick = coldfire_pit_tick;
mach_gettimeoffset = coldfire_pit_offset;
- mach_trap_init = coldfire_trap_init;
mach_reset = coldfire_reset;
}
void coldfire_pit_tick(void);
void coldfire_pit_init(irq_handler_t handler);
unsigned long coldfire_pit_offset(void);
-void coldfire_trap_init(void);
void coldfire_reset(void);
/***************************************************************************/
void config_BSP(char *commandp, int size)
{
mcf_disableall();
-
-#ifdef CONFIG_BOOTPARAM
- strncpy(commandp, CONFIG_BOOTPARAM_STRING, size);
- commandp[size-1] = 0;
-#else
- memset(commandp, 0, size);
-#endif
-
mach_sched_init = coldfire_pit_init;
mach_tick = coldfire_pit_tick;
mach_gettimeoffset = coldfire_pit_offset;
- mach_trap_init = coldfire_trap_init;
mach_reset = coldfire_reset;
}
void coldfire_tick(void);
void coldfire_timer_init(irq_handler_t handler);
unsigned long coldfire_timer_offset(void);
-void coldfire_trap_init(void);
void coldfire_reset(void);
extern unsigned int mcf_timervector;
{
mcf_setimr(MCFSIM_IMR_MASKALL);
-#if defined(CONFIG_BOOTPARAM)
- strncpy(commandp, CONFIG_BOOTPARAM_STRING, size);
- commandp[size-1] = 0;
-#elif defined(CONFIG_NETtel) || defined(CONFIG_eLIA) || \
+#if defined(CONFIG_NETtel) || defined(CONFIG_eLIA) || \
defined(CONFIG_DISKtel) || defined(CONFIG_SECUREEDGEMP3) || \
defined(CONFIG_CLEOPATRA)
/* Copy command line from FLASH to local buffer... */
mcf_timervector = 30;
mcf_profilevector = 31;
mcf_timerlevel = 6;
-#else
- memset(commandp, 0, size);
#endif
mach_sched_init = coldfire_timer_init;
mach_tick = coldfire_tick;
mach_gettimeoffset = coldfire_timer_offset;
- mach_trap_init = coldfire_trap_init;
mach_reset = coldfire_reset;
#ifdef MCF_BDM_DISABLE
* Beware - when entering resume, prev (the current task) is
* in a0, next (the new task) is in a1,so don't change these
* registers until their contents are no longer needed.
+ * This is always called in supervisor mode, so don't bother to save
+ * and restore sr; user's process sr is actually in the stack.
*/
ENTRY(resume)
movel %a0, %d1 /* get prev thread in d1 */
- movew %sr,%d0 /* save thread status reg */
- movew %d0,%a0@(TASK_THREAD+THREAD_SR)
-
- oril #0x700,%d0 /* disable interrupts */
- move %d0,%sr
-
movel sw_usp,%d0 /* save usp */
movel %d0,%a0@(TASK_THREAD+THREAD_USP)
movel %a1@(TASK_THREAD+THREAD_USP),%a0 /* restore thread user stack */
movel %a0, sw_usp
-
- movew %a1@(TASK_THREAD+THREAD_SR),%d0 /* restore thread status reg */
- movew %d0, %sr
rts
* hardware timer only exists in the Freescale ColdFire
* 5270/5271, 5282 and other CPUs.
*
- * Copyright (C) 1999-2006, Greg Ungerer (gerg@snapgear.com)
+ * Copyright (C) 1999-2007, Greg Ungerer (gerg@snapgear.com)
* Copyright (C) 2001-2004, SnapGear Inc. (www.snapgear.com)
- *
*/
/***************************************************************************/
#include <linux/param.h>
#include <linux/init.h>
#include <linux/interrupt.h>
+#include <linux/irq.h>
#include <asm/io.h>
-#include <asm/irq.h>
#include <asm/coldfire.h>
#include <asm/mcfpit.h>
#include <asm/mcfsim.h>
/***************************************************************************/
+static struct irqaction coldfire_pit_irq = {
+ .name = "timer",
+ .flags = IRQF_DISABLED | IRQF_TIMER,
+};
+
void coldfire_pit_init(irq_handler_t handler)
{
volatile unsigned char *icrp;
volatile unsigned long *imrp;
- request_irq(MCFINT_VECBASE + MCFINT_PIT1, handler, IRQF_DISABLED,
- "ColdFire Timer", NULL);
+ coldfire_pit_irq.handler = handler;
+ setup_irq(MCFINT_VECBASE + MCFINT_PIT1, &coldfire_pit_irq);
icrp = (volatile unsigned char *) (MCF_IPSBAR + MCFICM_INTC0 +
MCFINTC_ICR0 + MCFINT_PIT1);
/*
* timers.c -- generic ColdFire hardware timer support.
*
- * Copyright (C) 1999-2006, Greg Ungerer (gerg@snapgear.com)
+ * Copyright (C) 1999-2007, Greg Ungerer (gerg@snapgear.com)
*/
/***************************************************************************/
#include <linux/param.h>
#include <linux/interrupt.h>
#include <linux/init.h>
+#include <linux/irq.h>
#include <asm/io.h>
-#include <asm/irq.h>
#include <asm/traps.h>
#include <asm/machdep.h>
#include <asm/coldfire.h>
/***************************************************************************/
+static struct irqaction coldfire_timer_irq = {
+ .name = "timer",
+ .flags = IRQF_DISABLED | IRQF_TIMER,
+};
+
static int ticks_per_intr;
void coldfire_timer_init(irq_handler_t handler)
{
+ coldfire_timer_irq.handler = handler;
+ setup_irq(mcf_timervector, &coldfire_timer_irq);
+
__raw_writew(MCFTIMER_TMR_DISABLE, TA(MCFTIMER_TMR));
ticks_per_intr = (MCF_BUSCLK / 16) / HZ;
__raw_writetrr(ticks_per_intr - 1, TA(MCFTIMER_TRR));
__raw_writew(MCFTIMER_TMR_ENORI | MCFTIMER_TMR_CLK16 |
MCFTIMER_TMR_RESTART | MCFTIMER_TMR_ENABLE, TA(MCFTIMER_TMR));
- request_irq(mcf_timervector, handler, IRQF_DISABLED, "timer", NULL);
mcf_settimericr(1, mcf_timerlevel);
#ifdef CONFIG_HIGHPROFILE
void coldfire_tick(void);
void coldfire_timer_init(irq_handler_t handler);
unsigned long coldfire_timer_offset(void);
-void coldfire_trap_init(void);
void coldfire_reset(void);
extern unsigned int mcf_timervector;
{
mcf_setimr(MCFSIM_IMR_MASKALL);
-#if defined(CONFIG_BOOTPARAM)
- strncpy(commandp, CONFIG_BOOTPARAM_STRING, size);
- commandp[size-1] = 0;
-#else
+#if !defined(CONFIG_BOOTPARAM)
/* Copy command line from FLASH to local buffer... */
memcpy(commandp, (char *) 0x4000, 4);
if(strncmp(commandp, "kcl ", 4) == 0){
mach_sched_init = coldfire_timer_init;
mach_tick = coldfire_tick;
mach_gettimeoffset = coldfire_timer_offset;
- mach_trap_init = coldfire_trap_init;
mach_reset = coldfire_reset;
#ifdef MCF_BDM_DISABLE
void coldfire_tick(void);
void coldfire_timer_init(irq_handler_t handler);
unsigned long coldfire_timer_offset(void);
-void coldfire_trap_init(void);
void coldfire_reset(void);
extern unsigned int mcf_timervector;
{
mcf_setimr(MCFSIM_IMR_MASKALL);
-#if defined(CONFIG_BOOTPARAM)
- strncpy(commandp, CONFIG_BOOTPARAM_STRING, size);
- commandp[size-1] = 0;
-#else
- memset(commandp, 0, size);
-#endif
-
#if defined(CONFIG_CLEOPATRA)
/* Different timer setup - to prevent device clash */
mcf_timervector = 30;
mach_sched_init = coldfire_timer_init;
mach_tick = coldfire_tick;
mach_gettimeoffset = coldfire_timer_offset;
- mach_trap_init = coldfire_trap_init;
mach_reset = coldfire_reset;
}
#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/interrupt.h>
+#include <linux/irq.h>
#include <asm/setup.h>
#include <asm/system.h>
#include <asm/pgtable.h>
-#include <asm/irq.h>
#include <asm/machdep.h>
#include <asm/MC68VZ328.h>
/***************************************************************************/
+static struct irqaction m68328_timer_irq = {
+ .name = "timer",
+ .flags = IRQF_DISABLED | IRQF_TIMER,
+};
+
void m68328_timer_init(irq_handler_t timer_routine)
{
/* disable timer 1 */
TCTL = 0;
/* set ISR */
- if (request_irq(TMR_IRQ_NUM, timer_routine, IRQ_FLG_LOCK, "timer", NULL))
- panic("Unable to attach timer interrupt\n");
+ m68328_timer_irq.handler = timer_routine;
+ setup_irq(TMR_IRQ_NUM, &m68328_timer_irq);
/* Restart mode, Enable int, Set clock source */
TCTL = TCTL_OM | TCTL_IRQEN | CLOCK_SOURCE;
#include <linux/tty.h>
#include <linux/console.h>
#include <linux/interrupt.h>
+#include <linux/irq.h>
#include <asm/setup.h>
#include <asm/system.h>
#include <asm/pgtable.h>
-#include <asm/irq.h>
#include <asm/machdep.h>
#include <asm/m68360.h>
extern void config_M68360_irq(void);
+static struct irqaction m68360_timer_irq = {
+ .name = "timer",
+ .flags = IRQF_DISABLED | IRQF_TIMER,
+};
+
void BSP_sched_init(irq_handler_t timer_routine)
{
unsigned char prescaler;
unsigned short tgcr_save;
- int return_value;
#if 0
/* Restart mode, Enable int, 32KHz, Enable timer */
pquicc->timer_ter1 = 0x0003; /* clear timer events */
/* enable timer 1 interrupt in CIMR */
-// request_irq(IRQ_MACHSPEC | CPMVEC_TIMER1, timer_routine, IRQ_FLG_LOCK, "timer", NULL);
- //return_value = request_irq( CPMVEC_TIMER1, timer_routine, IRQ_FLG_LOCK, "timer", NULL);
- return_value = request_irq(CPMVEC_TIMER1 , timer_routine, IRQ_FLG_LOCK,
- "Timer", NULL);
+ m68360_timer_irq.handler = timer_routine;
+ setup_irq(CPMVEC_TIMER1, &m68360_timer_irq);
/* Start timer 1: */
tgcr_save = (pquicc->timer_tgcr & 0xfff0) | 0x0001;
{
printk(KERN_INFO "68VZ328 DragonBallVZ support (c) 2001 Lineo, Inc.\n");
-#if defined(CONFIG_BOOTPARAM)
- strncpy(command, CONFIG_BOOTPARAM_STRING, size);
- command[size-1] = 0;
-#else
- memset(command, 0, size);
-#endif
-
init_hardware(command, size);
mach_sched_init = (void *) m68328_timer_init;
# MIPS SIM
#
core-$(CONFIG_MIPS_SIM) += arch/mips/mipssim/
-cflags-$(CONFIG_MIPS_SIM) += -Iinclude/asm-mips/mach-sim
+cflags-$(CONFIG_MIPS_SIM) += -Iinclude/asm-mips/mach-mipssim
load-$(CONFIG_MIPS_SIM) += 0x80100000
#
+++ /dev/null
-/*
- * This file is subject to the terms and conditions of the GNU General Public
- * License. See the file "COPYING" in the main directory of this archive
- * for more details.
- *
- * Copyright (C) 1996 David S. Miller (dm@sgi.com)
- * Compability with board caches, Ulf Carlsson
- */
-#include <linux/kernel.h>
-#include <asm/sgialib.h>
-#include <asm/bcache.h>
-
-/*
- * IP22 boardcache is not compatible with board caches. Thus we disable it
- * during romvec action. Since r4xx0.c is always compiled and linked with your
- * kernel, this shouldn't cause any harm regardless what MIPS processor you
- * have.
- *
- * The ARC write and read functions seem to interfere with the serial lines
- * in some way. You should be careful with them.
- */
-
-void prom_putchar(char c)
-{
- ULONG cnt;
- CHAR it = c;
-
- bc_disable();
- ArcWrite(1, &it, 1, &cnt);
- bc_enable();
-}
+++ /dev/null
-/*
- * This file is subject to the terms and conditions of the GNU General Public
- * License. See the file "COPYING" in the main directory of this archive
- * for more details.
- *
- * Low level I/O functions for Jazz family machines.
- *
- * Copyright (C) 1997 by Ralf Baechle.
- */
-#include <linux/string.h>
-#include <linux/spinlock.h>
-#include <asm/addrspace.h>
-#include <asm/system.h>
-#include <asm/jazz.h>
-
-/*
- * Map an 16mb segment of the EISA address space to 0xe3000000;
- */
-static inline void map_eisa_address(unsigned long address)
-{
- /* XXX */
- /* We've got an wired entry in the TLB. We just need to modify it.
- fast and clean. But since we want to get rid of wired entries
- things are a little bit more complicated ... */
-}
-
-static unsigned char jazz_readb(unsigned long addr)
-{
- unsigned char res;
-
- map_eisa_address(addr);
- addr &= 0xffffff;
- res = *(volatile unsigned char *) (JAZZ_EISA_BASE + addr);
-
- return res;
-}
-
-static unsigned short jazz_readw(unsigned long addr)
-{
- unsigned short res;
-
- map_eisa_address(addr);
- addr &= 0xffffff;
- res = *(volatile unsigned char *) (JAZZ_EISA_BASE + addr);
-
- return res;
-}
-
-static unsigned int jazz_readl(unsigned long addr)
-{
- unsigned int res;
-
- map_eisa_address(addr);
- addr &= 0xffffff;
- res = *(volatile unsigned char *) (JAZZ_EISA_BASE + addr);
-
- return res;
-}
-
-static void jazz_writeb(unsigned char val, unsigned long addr)
-{
- map_eisa_address(addr);
- addr &= 0xffffff;
- *(volatile unsigned char *) (JAZZ_EISA_BASE + addr) = val;
-}
-
-static void jazz_writew(unsigned short val, unsigned long addr)
-{
- map_eisa_address(addr);
- addr &= 0xffffff;
- *(volatile unsigned char *) (JAZZ_EISA_BASE + addr) = val;
-}
-
-static void jazz_writel(unsigned int val, unsigned long addr)
-{
- map_eisa_address(addr);
- addr &= 0xffffff;
- *(volatile unsigned char *) (JAZZ_EISA_BASE + addr) = val;
-}
-
-static void jazz_memset_io(unsigned long addr, int val, unsigned long len)
-{
- unsigned long waddr;
-
- waddr = JAZZ_EISA_BASE | (addr & 0xffffff);
- while(len) {
- unsigned long fraglen;
-
- fraglen = (~addr + 1) & 0xffffff;
- fraglen = (fraglen < len) ? fraglen : len;
- map_eisa_address(addr);
- memset((char *)waddr, val, fraglen);
- addr += fraglen;
- waddr = waddr + fraglen - 0x1000000;
- len -= fraglen;
- }
-}
-
-static void jazz_memcpy_fromio(unsigned long to, unsigned long from, unsigned long len)
-{
- unsigned long waddr;
-
- waddr = JAZZ_EISA_BASE | (from & 0xffffff);
- while(len) {
- unsigned long fraglen;
-
- fraglen = (~from + 1) & 0xffffff;
- fraglen = (fraglen < len) ? fraglen : len;
- map_eisa_address(from);
- memcpy((void *)to, (void *)waddr, fraglen);
- to += fraglen;
- from += fraglen;
- waddr = waddr + fraglen - 0x1000000;
- len -= fraglen;
- }
-}
-
-static void jazz_memcpy_toio(unsigned long to, unsigned long from, unsigned long len)
-{
- unsigned long waddr;
-
- waddr = JAZZ_EISA_BASE | (to & 0xffffff);
- while(len) {
- unsigned long fraglen;
-
- fraglen = (~to + 1) & 0xffffff;
- fraglen = (fraglen < len) ? fraglen : len;
- map_eisa_address(to);
- memcpy((char *)to + JAZZ_EISA_BASE, (void *)from, fraglen);
- to += fraglen;
- from += fraglen;
- waddr = waddr + fraglen - 0x1000000;
- len -= fraglen;
- }
-}
*/
#include <linux/jiffies.h>
#include <asm/jazz.h>
-#include <asm/io.h>
-#include <asm/system.h>
-#include <asm/reboot.h>
-#include <asm/delay.h>
#define KBD_STAT_IBF 0x02 /* Keyboard input buffer full */
jazz_write_output (0x00);
}
}
-
-void jazz_machine_halt(void)
-{
-}
-
-void jazz_machine_power_off(void)
-{
- /* Jazz machines don't have a software power switch */
-}
extern asmlinkage void jazz_handle_int(void);
extern void jazz_machine_restart(char *command);
-extern void jazz_machine_halt(void);
-extern void jazz_machine_power_off(void);
void __init plat_timer_setup(struct irqaction *irq)
{
/* The RTC is outside the port address space */
_machine_restart = jazz_machine_restart;
- _machine_halt = jazz_machine_halt;
- pm_power_off = jazz_machine_power_off;
screen_info = (struct screen_info) {
0, 0, /* orig-x, orig-y */
static int __init jmr3927_rtc_init(void)
{
- struct resource res = {
+ static struct resource __initdata res = {
.start = JMR3927_IOC_NVRAMB_ADDR - IO_BASE,
.end = JMR3927_IOC_NVRAMB_ADDR - IO_BASE + 0x800 - 1,
.flags = IORESOURCE_MEM,
* malloc is needed by gdb client in "call func()", even a private one
* will make gdb happy
*/
-static void * __attribute_used__ malloc(size_t size)
+static void __used *malloc(size_t size)
{
return kmalloc(size, GFP_ATOMIC);
}
-static void __attribute_used__ free (void *where)
+static void __used free(void *where)
{
kfree(where);
}
EXPORT(stext) # used for profiling
EXPORT(_stext)
-#ifdef CONFIG_BOOT_RAW
+#ifndef CONFIG_BOOT_RAW
/*
* Give us a fighting chance of running if execution beings at the
* kernel load address. This is needed because this platform does
}
save_static_function(sys32_clone);
-__attribute_used__ noinline static int
+static int noinline __used
_sys32_clone(nabi_no_regargs struct pt_regs regs)
{
unsigned long clone_flags;
return IRQ_HANDLED;
}
-static __attribute_used__ void dump_rtlx(void)
+static void __used dump_rtlx(void)
{
int i;
}
save_static_function(sys_fork);
-__attribute_used__ noinline static int
+static int __used noinline
_sys_fork(nabi_no_regargs struct pt_regs regs)
{
return do_fork(SIGCHLD, regs.regs[29], ®s, 0, NULL, NULL);
}
save_static_function(sys_clone);
-__attribute_used__ noinline static int
+static int __used noinline
_sys_clone(nabi_no_regargs struct pt_regs regs)
{
unsigned long clone_flags;
};
static void release_progmem(void *ptr);
-/* static __attribute_used__ void dump_vpe(struct vpe * v); */
extern void save_gp_address(unsigned int secbase, unsigned int rel);
/* get the vpe associated with this minor */
return 0;
}
-__attribute_used__ void dump_vpe(struct vpe * v)
+void __used dump_vpe(struct vpe * v)
{
struct tc *t;
/*
* Invalidate all caches on this CPU
*/
-static void __attribute_used__ local_sb1___flush_cache_all(void)
+static void __used local_sb1___flush_cache_all(void)
{
__sb1_writeback_inv_dcache_all();
__sb1_flush_icache_all();
}
#endif
-void free_initmem(void)
+void __init_refok free_initmem(void)
{
prom_free_prom_memory();
free_init_pages("unused kernel memory",
#include <asm/addrspace.h>
#include <asm/sni.h>
#include <asm/mipsprom.h>
+#include <asm/mipsregs.h>
#include <asm/bootinfo.h>
/* special SNI prom calls */
#define SNI_IDPROM_SIZE 0x1000
#ifdef DEBUG
-static void sni_idprom_dump(void)
+static void __init sni_idprom_dump(void)
{
int i;
}
#endif
-static void sni_mem_init(void )
+static void __init sni_mem_init(void )
{
int i, memsize;
struct membank {
static int __init toshiba_rbtx4927_rtc_init(void)
{
- struct resource res = {
+ static struct resource __initdata res = {
.start = 0x1c010000,
.end = 0x1c010000 + 0x800 - 1,
.flags = IORESOURCE_MEM,
default y if 40x || 44x
default n
-config PPC_INDIRECT_PCI_BE
- bool
- depends PPC_INDIRECT_PCI
- default n
-
config EISA
bool
config FSL_SOC
bool
+config FSL_PCI
+ bool
+ select PPC_INDIRECT_PCI
+
# Yes MCA RS/6000s exist but Linux-PPC does not currently support any
config MCA
bool
config BOOTX_TEXT
bool "Support for early boot text console (BootX or OpenFirmware only)"
- depends PPC_OF
+ depends PPC_OF && PPC_MULTIPLATFORM
help
Say Y here to see progress messages from the boot firmware in text
mode. Requires either BootX or Open Firmware.
PowerPC,603e { /* Really 8241 */
device_type = "cpu";
reg = <0>;
- clock-frequency = <bebc200>; /* Fixed by bootwrapper */
- timebase-frequency = <1743000>; /* Fixed by bootwrapper */
- bus-frequency = <0>; /* From bootloader */
+ clock-frequency = <bebc200>; /* Fixed by bootloader */
+ timebase-frequency = <1743000>; /* Fixed by bootloader */
+ bus-frequency = <0>; /* Fixed by bootloader */
/* Following required by dtc but not used */
- i-cache-line-size = <0>;
- d-cache-line-size = <0>;
i-cache-size = <4000>;
d-cache-size = <4000>;
};
fef00000 fef00000 00100000>; /* pci iack */
i2c@80003000 {
+ #address-cells = <1>;
+ #size-cells = <0>;
device_type = "i2c";
compatible = "fsl-i2c";
reg = <80003000 1000>;
interrupts = <5 2>;
interrupt-parent = <&mpic>;
+
+ rtc@32 {
+ device_type = "rtc";
+ compatible = "ricoh,rs5c372b";
+ reg = <32>;
+ };
};
serial@80004500 {
interrupt-parent = <&mpic>;
};
- mpic: pic@80040000 {
+ mpic: interrupt-controller@80040000 {
#interrupt-cells = <2>;
#address-cells = <0>;
device_type = "open-pic";
PowerPC,603e { /* Really 8241 */
device_type = "cpu";
reg = <0>;
- clock-frequency = <fdad680>; /* Fixed by bootwrapper */
- timebase-frequency = <1F04000>; /* Fixed by bootwrapper */
- bus-frequency = <0>; /* From bootloader */
+ clock-frequency = <fdad680>; /* Fixed by bootloader */
+ timebase-frequency = <1F04000>; /* Fixed by bootloader */
+ bus-frequency = <0>; /* Fixed by bootloader */
/* Following required by dtc but not used */
- i-cache-line-size = <0>;
- d-cache-line-size = <0>;
i-cache-size = <4000>;
d-cache-size = <4000>;
};
fef00000 fef00000 00100000>; /* pci iack */
i2c@80003000 {
+ #address-cells = <1>;
+ #size-cells = <0>;
device_type = "i2c";
compatible = "fsl-i2c";
reg = <80003000 1000>;
interrupts = <5 2>;
interrupt-parent = <&mpic>;
+
+ rtc@32 {
+ device_type = "rtc";
+ compatible = "ricoh,rs5c372b";
+ reg = <32>;
+ };
};
serial@80004500 {
interrupt-parent = <&mpic>;
};
- mpic: pic@80040000 {
- interrupt-parent = <&mpic>;
+ mpic: interrupt-controller@80040000 {
#interrupt-cells = <2>;
#address-cells = <0>;
device_type = "open-pic";
#address-cells = <1>;
#size-cells = <1>;
#interrupt-cells = <2>;
- device_type = "tsi108-bridge";
+ device_type = "tsi-bridge";
ranges = <00000000 c0000000 00010000>;
reg = <c0000000 00010000>;
bus-frequency = <0>;
#size-cells = <2>;
#address-cells = <3>;
reg = <8500 100>;
- compatible = "83xx";
+ compatible = "fsl,mpc8349-pci";
device_type = "pci";
};
#size-cells = <2>;
#address-cells = <3>;
reg = <8500 100>;
- compatible = "83xx";
+ compatible = "fsl,mpc8349-pci";
device_type = "pci";
};
#size-cells = <2>;
#address-cells = <3>;
reg = <8500 100>;
- compatible = "83xx";
+ compatible = "fsl,mpc8349-pci";
device_type = "pci";
};
#size-cells = <2>;
#address-cells = <3>;
reg = <8500 100>;
- compatible = "83xx";
+ compatible = "fsl,mpc8349-pci";
device_type = "pci";
};
#size-cells = <2>;
#address-cells = <3>;
reg = <8600 100>;
- compatible = "83xx";
+ compatible = "fsl,mpc8349-pci";
device_type = "pci";
};
#size-cells = <2>;
#address-cells = <3>;
reg = <8600 100>;
- compatible = "83xx";
+ compatible = "fsl,mpc8349-pci";
device_type = "pci";
};
#size-cells = <2>;
#address-cells = <3>;
reg = <8500 100>;
- compatible = "83xx";
+ compatible = "fsl,mpc8349-pci";
device_type = "pci";
};
#size-cells = <2>;
#address-cells = <3>;
reg = <8600 100>;
- compatible = "83xx";
+ compatible = "fsl,mpc8349-pci";
device_type = "pci";
};
#size-cells = <2>;
#address-cells = <3>;
reg = <8500 100>;
- compatible = "83xx";
+ compatible = "fsl,mpc8349-pci";
device_type = "pci";
};
#size-cells = <2>;
#address-cells = <3>;
reg = <8000 1000>;
- compatible = "85xx";
+ compatible = "fsl,mpc8540-pcix", "fsl,mpc8540-pci";
device_type = "pci";
};
#size-cells = <2>;
#address-cells = <3>;
reg = <8000 1000>;
- compatible = "85xx";
+ compatible = "fsl,mpc8540-pci";
device_type = "pci";
i8259@19000 {
#size-cells = <2>;
#address-cells = <3>;
reg = <9000 1000>;
- compatible = "85xx";
+ compatible = "fsl,mpc8540-pci";
device_type = "pci";
};
interrupts = <1d 2 1e 2 22 2>;
interrupt-parent = <&mpic>;
phy-handle = <&phy0>;
+ phy-connection-type = "rgmii-id";
};
ethernet@26000 {
interrupts = <1f 2 20 2 21 2>;
interrupt-parent = <&mpic>;
phy-handle = <&phy1>;
+ phy-connection-type = "rgmii-id";
};
serial@4500 {
interrupt-parent = <&mpic>;
};
+ pci@8000 {
+ compatible = "fsl,mpc8540-pci";
+ device_type = "pci";
+ interrupt-map-mask = <f800 0 0 7>;
+ interrupt-map = <
+
+ /* IDSEL 0x11 J17 Slot 1 */
+ 8800 0 0 1 &mpic 2 1
+ 8800 0 0 2 &mpic 3 1
+ 8800 0 0 3 &mpic 4 1
+ 8800 0 0 4 &mpic 1 1
+
+ /* IDSEL 0x12 J16 Slot 2 */
+
+ 9000 0 0 1 &mpic 3 1
+ 9000 0 0 2 &mpic 4 1
+ 9000 0 0 3 &mpic 2 1
+ 9000 0 0 4 &mpic 1 1>;
+
+ interrupt-parent = <&mpic>;
+ interrupts = <18 2>;
+ bus-range = <0 ff>;
+ ranges = <02000000 0 80000000 80000000 0 10000000
+ 01000000 0 00000000 e2000000 0 00800000>;
+ clock-frequency = <3f940aa>;
+ #interrupt-cells = <1>;
+ #size-cells = <2>;
+ #address-cells = <3>;
+ reg = <8000 1000>;
+ };
+
+ pcie@9000 {
+ compatible = "fsl,mpc8548-pcie";
+ device_type = "pci";
+ #interrupt-cells = <1>;
+ #size-cells = <2>;
+ #address-cells = <3>;
+ reg = <9000 1000>;
+ bus-range = <0 ff>;
+ ranges = <02000000 0 90000000 90000000 0 10000000
+ 01000000 0 00000000 e3000000 0 00800000>;
+ clock-frequency = <1fca055>;
+ interrupt-parent = <&mpic>;
+ interrupts = <1a 2>;
+ interrupt-map-mask = <f800 0 0 7>;
+ interrupt-map = <
+ /* IDSEL 0x0 */
+ 0000 0 0 1 &mpic 4 1
+ 0000 0 0 2 &mpic 5 1
+ 0000 0 0 3 &mpic 6 1
+ 0000 0 0 4 &mpic 7 1
+ >;
+ };
+
+ pcie@a000 {
+ compatible = "fsl,mpc8548-pcie";
+ device_type = "pci";
+ #interrupt-cells = <1>;
+ #size-cells = <2>;
+ #address-cells = <3>;
+ reg = <a000 1000>;
+ bus-range = <0 ff>;
+ ranges = <02000000 0 a0000000 a0000000 0 10000000
+ 01000000 0 00000000 e2800000 0 00800000>;
+ clock-frequency = <1fca055>;
+ interrupt-parent = <&mpic>;
+ interrupts = <19 2>;
+ interrupt-map-mask = <f800 0 0 7>;
+ interrupt-map = <
+ /* IDSEL 0x0 */
+ 0000 0 0 1 &mpic 0 1
+ 0000 0 0 2 &mpic 1 1
+ 0000 0 0 3 &mpic 2 1
+ 0000 0 0 4 &mpic 3 1
+ >;
+ };
+
+ pcie@b000 {
+ compatible = "fsl,mpc8548-pcie";
+ device_type = "pci";
+ #interrupt-cells = <1>;
+ #size-cells = <2>;
+ #address-cells = <3>;
+ reg = <b000 1000>;
+ bus-range = <0 ff>;
+ ranges = <02000000 0 b0000000 b0000000 0 10000000
+ 01000000 0 00000000 e3800000 0 00800000>;
+ clock-frequency = <1fca055>;
+ interrupt-parent = <&mpic>;
+ interrupts = <1b 2>;
+ interrupt-map-mask = <f800 0 0 7>;
+ interrupt-map = <
+
+ // IDSEL 0x1a
+ d000 0 0 1 &i8259 6 2
+ d000 0 0 2 &i8259 3 2
+ d000 0 0 3 &i8259 4 2
+ d000 0 0 4 &i8259 5 2
+
+ // IDSEL 0x1b
+ d800 0 0 1 &i8259 5 2
+ d800 0 0 2 &i8259 0 0
+ d800 0 0 3 &i8259 0 0
+ d800 0 0 4 &i8259 0 0
+
+ // IDSEL 0x1c USB
+ e000 0 0 1 &i8259 9 2
+ e000 0 0 2 &i8259 a 2
+ e000 0 0 3 &i8259 c 2
+ e000 0 0 4 &i8259 7 2
+
+ // IDSEL 0x1d Audio
+ e800 0 0 1 &i8259 9 2
+ e800 0 0 2 &i8259 a 2
+ e800 0 0 3 &i8259 b 2
+ e800 0 0 4 &i8259 0 0
+
+ // IDSEL 0x1e Legacy
+ f000 0 0 1 &i8259 c 2
+ f000 0 0 2 &i8259 0 0
+ f000 0 0 3 &i8259 0 0
+ f000 0 0 4 &i8259 0 0
+
+ // IDSEL 0x1f IDE/SATA
+ f800 0 0 1 &i8259 6 2
+ f800 0 0 2 &i8259 0 0
+ f800 0 0 3 &i8259 0 0
+ f800 0 0 4 &i8259 0 0
+ >;
+ uli1575@0 {
+ reg = <0 0 0 0 0>;
+ #size-cells = <2>;
+ #address-cells = <3>;
+ ranges = <02000000 0 b0000000
+ 02000000 0 b0000000
+ 0 10000000
+ 01000000 0 00000000
+ 01000000 0 00000000
+ 0 00080000>;
+
+ pci_bridge@0 {
+ reg = <0 0 0 0 0>;
+ #size-cells = <2>;
+ #address-cells = <3>;
+ ranges = <02000000 0 b0000000
+ 02000000 0 b0000000
+ 0 20000000
+ 01000000 0 00000000
+ 01000000 0 00000000
+ 0 00100000>;
+
+ isa@1e {
+ device_type = "isa";
+ #interrupt-cells = <2>;
+ #size-cells = <1>;
+ #address-cells = <2>;
+ reg = <f000 0 0 0 0>;
+ ranges = <1 0 01000000 0 0
+ 00001000>;
+ interrupt-parent = <&i8259>;
+
+ i8259: interrupt-controller@20 {
+ reg = <1 20 2
+ 1 a0 2
+ 1 4d0 2>;
+ clock-frequency = <0>;
+ interrupt-controller;
+ device_type = "interrupt-controller";
+ #address-cells = <0>;
+ #interrupt-cells = <2>;
+ built-in;
+ compatible = "chrp,iic";
+ interrupts = <9 2>;
+ interrupt-parent =
+ <&mpic>;
+ };
+
+ i8042@60 {
+ #size-cells = <0>;
+ #address-cells = <1>;
+ reg = <1 60 1 1 64 1>;
+ interrupts = <1 3 c 3>;
+ interrupt-parent =
+ <&i8259>;
+
+ keyboard@0 {
+ reg = <0>;
+ compatible = "pnpPNP,303";
+ };
+
+ mouse@1 {
+ reg = <1>;
+ compatible = "pnpPNP,f03";
+ };
+ };
+
+ rtc@70 {
+ compatible =
+ "pnpPNP,b00";
+ reg = <1 70 2>;
+ };
+
+ gpio@400 {
+ reg = <1 400 80>;
+ };
+ };
+ };
+ };
+
+ };
+
+ global-utilities@e0000 { //global utilities block
+ compatible = "fsl,mpc8548-guts";
+ reg = <e0000 1000>;
+ fsl,has-rstcr;
+ };
+
mpic: pic@40000 {
clock-frequency = <0>;
interrupt-controller;
/*
- * MPC8555 CDS Device Tree Source
+ * MPC8548 CDS Device Tree Source
*
* Copyright 2006 Freescale Semiconductor Inc.
*
#size-cells = <1>;
#interrupt-cells = <2>;
device_type = "soc";
- ranges = <0 e0000000 00100000>;
- reg = <e0000000 00100000>; // CCSRBAR 1M
+ ranges = <00001000 e0001000 000ff000
+ 80000000 80000000 10000000
+ e2000000 e2000000 00800000
+ 90000000 90000000 10000000
+ e2800000 e2800000 00800000
+ a0000000 a0000000 20000000
+ e3000000 e3000000 01000000>;
+ reg = <e0000000 00001000>; // CCSRBAR
bus-frequency = <0>;
memory-controller@2000 {
serial@4500 {
device_type = "serial";
compatible = "ns16550";
- reg = <4500 100>; // reg base, size
- clock-frequency = <0>; // should we fill in in uboot?
+ reg = <4500 100>; // reg base, size
+ clock-frequency = <0>; // should we fill in in uboot?
interrupts = <2a 2>;
interrupt-parent = <&mpic>;
};
device_type = "serial";
compatible = "ns16550";
reg = <4600 100>; // reg base, size
- clock-frequency = <0>; // should we fill in in uboot?
+ clock-frequency = <0>; // should we fill in in uboot?
interrupts = <2a 2>;
interrupt-parent = <&mpic>;
};
fsl,has-rstcr;
};
- pci1: pci@8000 {
- interrupt-map-mask = <1f800 0 0 7>;
+ pci@8000 {
+ interrupt-map-mask = <f800 0 0 7>;
interrupt-map = <
+ /* IDSEL 0x4 (PCIX Slot 2) */
+ 02000 0 0 1 &mpic 0 1
+ 02000 0 0 2 &mpic 1 1
+ 02000 0 0 3 &mpic 2 1
+ 02000 0 0 4 &mpic 3 1
+
+ /* IDSEL 0x5 (PCIX Slot 3) */
+ 02800 0 0 1 &mpic 1 1
+ 02800 0 0 2 &mpic 2 1
+ 02800 0 0 3 &mpic 3 1
+ 02800 0 0 4 &mpic 0 1
+
+ /* IDSEL 0x6 (PCIX Slot 4) */
+ 03000 0 0 1 &mpic 2 1
+ 03000 0 0 2 &mpic 3 1
+ 03000 0 0 3 &mpic 0 1
+ 03000 0 0 4 &mpic 1 1
+
+ /* IDSEL 0x8 (PCIX Slot 5) */
+ 04000 0 0 1 &mpic 0 1
+ 04000 0 0 2 &mpic 1 1
+ 04000 0 0 3 &mpic 2 1
+ 04000 0 0 4 &mpic 3 1
+
+ /* IDSEL 0xC (Tsi310 bridge) */
+ 06000 0 0 1 &mpic 0 1
+ 06000 0 0 2 &mpic 1 1
+ 06000 0 0 3 &mpic 2 1
+ 06000 0 0 4 &mpic 3 1
+
+ /* IDSEL 0x14 (Slot 2) */
+ 0a000 0 0 1 &mpic 0 1
+ 0a000 0 0 2 &mpic 1 1
+ 0a000 0 0 3 &mpic 2 1
+ 0a000 0 0 4 &mpic 3 1
+
+ /* IDSEL 0x15 (Slot 3) */
+ 0a800 0 0 1 &mpic 1 1
+ 0a800 0 0 2 &mpic 2 1
+ 0a800 0 0 3 &mpic 3 1
+ 0a800 0 0 4 &mpic 0 1
+
+ /* IDSEL 0x16 (Slot 4) */
+ 0b000 0 0 1 &mpic 2 1
+ 0b000 0 0 2 &mpic 3 1
+ 0b000 0 0 3 &mpic 0 1
+ 0b000 0 0 4 &mpic 1 1
+
+ /* IDSEL 0x18 (Slot 5) */
+ 0c000 0 0 1 &mpic 0 1
+ 0c000 0 0 2 &mpic 1 1
+ 0c000 0 0 3 &mpic 2 1
+ 0c000 0 0 4 &mpic 3 1
+
+ /* IDSEL 0x1C (Tsi310 bridge PCI primary) */
+ 0E000 0 0 1 &mpic 0 1
+ 0E000 0 0 2 &mpic 1 1
+ 0E000 0 0 3 &mpic 2 1
+ 0E000 0 0 4 &mpic 3 1>;
- /* IDSEL 0x10 */
- 08000 0 0 1 &mpic 0 1
- 08000 0 0 2 &mpic 1 1
- 08000 0 0 3 &mpic 2 1
- 08000 0 0 4 &mpic 3 1
-
- /* IDSEL 0x11 */
- 08800 0 0 1 &mpic 0 1
- 08800 0 0 2 &mpic 1 1
- 08800 0 0 3 &mpic 2 1
- 08800 0 0 4 &mpic 3 1
-
- /* IDSEL 0x12 (Slot 1) */
- 09000 0 0 1 &mpic 0 1
- 09000 0 0 2 &mpic 1 1
- 09000 0 0 3 &mpic 2 1
- 09000 0 0 4 &mpic 3 1
-
- /* IDSEL 0x13 (Slot 2) */
- 09800 0 0 1 &mpic 1 1
- 09800 0 0 2 &mpic 2 1
- 09800 0 0 3 &mpic 3 1
- 09800 0 0 4 &mpic 0 1
-
- /* IDSEL 0x14 (Slot 3) */
- 0a000 0 0 1 &mpic 2 1
- 0a000 0 0 2 &mpic 3 1
- 0a000 0 0 3 &mpic 0 1
- 0a000 0 0 4 &mpic 1 1
-
- /* IDSEL 0x15 (Slot 4) */
- 0a800 0 0 1 &mpic 3 1
- 0a800 0 0 2 &mpic 0 1
- 0a800 0 0 3 &mpic 1 1
- 0a800 0 0 4 &mpic 2 1
-
- /* Bus 1 (Tundra Bridge) */
- /* IDSEL 0x12 (ISA bridge) */
- 19000 0 0 1 &mpic 0 1
- 19000 0 0 2 &mpic 1 1
- 19000 0 0 3 &mpic 2 1
- 19000 0 0 4 &mpic 3 1>;
interrupt-parent = <&mpic>;
interrupts = <18 2>;
bus-range = <0 0>;
- ranges = <02000000 0 80000000 80000000 0 20000000
- 01000000 0 00000000 e2000000 0 00100000>;
+ ranges = <02000000 0 80000000 80000000 0 10000000
+ 01000000 0 00000000 e2000000 0 00800000>;
clock-frequency = <3f940aa>;
#interrupt-cells = <1>;
#size-cells = <2>;
#address-cells = <3>;
reg = <8000 1000>;
- compatible = "85xx";
+ compatible = "fsl,mpc8540-pcix", "fsl,mpc8540-pci";
device_type = "pci";
- i8259@19000 {
- clock-frequency = <0>;
- interrupt-controller;
- device_type = "interrupt-controller";
- reg = <19000 0 0 0 1>;
- #address-cells = <0>;
- #interrupt-cells = <2>;
- built-in;
- compatible = "chrp,iic";
- big-endian;
- interrupts = <1>;
- interrupt-parent = <&pci1>;
+ pci_bridge@1c {
+ interrupt-map-mask = <f800 0 0 7>;
+ interrupt-map = <
+
+ /* IDSEL 0x00 (PrPMC Site) */
+ 0000 0 0 1 &mpic 0 1
+ 0000 0 0 2 &mpic 1 1
+ 0000 0 0 3 &mpic 2 1
+ 0000 0 0 4 &mpic 3 1
+
+ /* IDSEL 0x04 (VIA chip) */
+ 2000 0 0 1 &mpic 0 1
+ 2000 0 0 2 &mpic 1 1
+ 2000 0 0 3 &mpic 2 1
+ 2000 0 0 4 &mpic 3 1
+
+ /* IDSEL 0x05 (8139) */
+ 2800 0 0 1 &mpic 1 1
+
+ /* IDSEL 0x06 (Slot 6) */
+ 3000 0 0 1 &mpic 2 1
+ 3000 0 0 2 &mpic 3 1
+ 3000 0 0 3 &mpic 0 1
+ 3000 0 0 4 &mpic 1 1
+
+ /* IDESL 0x07 (Slot 7) */
+ 3800 0 0 1 &mpic 3 1
+ 3800 0 0 2 &mpic 0 1
+ 3800 0 0 3 &mpic 1 1
+ 3800 0 0 4 &mpic 2 1>;
+
+ reg = <e000 0 0 0 0>;
+ #interrupt-cells = <1>;
+ #size-cells = <2>;
+ #address-cells = <3>;
+ ranges = <02000000 0 80000000
+ 02000000 0 80000000
+ 0 20000000
+ 01000000 0 00000000
+ 01000000 0 00000000
+ 0 00080000>;
+ clock-frequency = <1fca055>;
+
+ isa@4 {
+ device_type = "isa";
+ #interrupt-cells = <2>;
+ #size-cells = <1>;
+ #address-cells = <2>;
+ reg = <2000 0 0 0 0>;
+ ranges = <1 0 01000000 0 0 00001000>;
+ interrupt-parent = <&i8259>;
+
+ i8259: interrupt-controller@20 {
+ clock-frequency = <0>;
+ interrupt-controller;
+ device_type = "interrupt-controller";
+ reg = <1 20 2
+ 1 a0 2
+ 1 4d0 2>;
+ #address-cells = <0>;
+ #interrupt-cells = <2>;
+ built-in;
+ compatible = "chrp,iic";
+ interrupts = <0 1>;
+ interrupt-parent = <&mpic>;
+ };
+
+ rtc@70 {
+ compatible = "pnpPNP,b00";
+ reg = <1 70 2>;
+ };
+ };
};
};
/* IDSEL 0x15 */
a800 0 0 1 &mpic b 1
- a800 0 0 2 &mpic b 1
- a800 0 0 3 &mpic b 1
- a800 0 0 4 &mpic b 1>;
+ a800 0 0 2 &mpic 1 1
+ a800 0 0 3 &mpic 2 1
+ a800 0 0 4 &mpic 3 1>;
+
interrupt-parent = <&mpic>;
interrupts = <19 2>;
bus-range = <0 0>;
- ranges = <02000000 0 a0000000 a0000000 0 20000000
- 01000000 0 00000000 e3000000 0 00100000>;
+ ranges = <02000000 0 90000000 90000000 0 10000000
+ 01000000 0 00000000 e2800000 0 00800000>;
clock-frequency = <3f940aa>;
#interrupt-cells = <1>;
#size-cells = <2>;
#address-cells = <3>;
reg = <9000 1000>;
- compatible = "85xx";
+ compatible = "fsl,mpc8540-pci";
+ device_type = "pci";
+ };
+ /* PCI Express */
+ pcie@a000 {
+ interrupt-map-mask = <f800 0 0 7>;
+ interrupt-map = <
+
+ /* IDSEL 0x0 (PEX) */
+ 00000 0 0 1 &mpic 0 1
+ 00000 0 0 2 &mpic 1 1
+ 00000 0 0 3 &mpic 2 1
+ 00000 0 0 4 &mpic 3 1>;
+
+ interrupt-parent = <&mpic>;
+ interrupts = <1a 2>;
+ bus-range = <0 ff>;
+ ranges = <02000000 0 a0000000 a0000000 0 20000000
+ 01000000 0 00000000 e3000000 0 08000000>;
+ clock-frequency = <1fca055>;
+ #interrupt-cells = <1>;
+ #size-cells = <2>;
+ #address-cells = <3>;
+ reg = <a000 1000>;
+ compatible = "fsl,mpc8548-pcie";
device_type = "pci";
};
#size-cells = <2>;
#address-cells = <3>;
reg = <8000 1000>;
- compatible = "85xx";
+ compatible = "fsl,mpc8540-pci";
device_type = "pci";
i8259@19000 {
#size-cells = <2>;
#address-cells = <3>;
reg = <9000 1000>;
- compatible = "85xx";
+ compatible = "fsl,mpc8540-pci";
device_type = "pci";
};
#interrupt-cells = <1>;
#size-cells = <2>;
#address-cells = <3>;
- compatible = "85xx";
+ compatible = "fsl,mpc8540-pcix", "fsl,mpc8540-pci";
device_type = "pci";
reg = <8000 1000>;
clock-frequency = <3f940aa>;
interrupt-parent = <&mpic>;
};
+ global-utilities@e0000 { //global utilities block
+ compatible = "fsl,mpc8548-guts";
+ reg = <e0000 1000>;
+ fsl,has-rstcr;
+ };
+
+ pci@8000 {
+ interrupt-map-mask = <f800 0 0 7>;
+ interrupt-map = <
+ /* IDSEL 0x12 AD18 */
+ 9000 0 0 1 &mpic 5 1
+ 9000 0 0 2 &mpic 6 1
+ 9000 0 0 3 &mpic 7 1
+ 9000 0 0 4 &mpic 4 1
+
+ /* IDSEL 0x13 AD19 */
+ 9800 0 0 1 &mpic 6 1
+ 9800 0 0 2 &mpic 7 1
+ 9800 0 0 3 &mpic 4 1
+ 9800 0 0 4 &mpic 5 1>;
+
+ interrupt-parent = <&mpic>;
+ interrupts = <18 2>;
+ bus-range = <0 ff>;
+ ranges = <02000000 0 80000000 80000000 0 20000000
+ 01000000 0 00000000 e2000000 0 00800000>;
+ clock-frequency = <3f940aa>;
+ #interrupt-cells = <1>;
+ #size-cells = <2>;
+ #address-cells = <3>;
+ reg = <8000 1000>;
+ compatible = "fsl,mpc8540-pci";
+ device_type = "pci";
+ };
+
+ /* PCI Express */
+ pcie@a000 {
+ interrupt-map-mask = <f800 0 0 7>;
+ interrupt-map = <
+
+ /* IDSEL 0x0 (PEX) */
+ 00000 0 0 1 &mpic 0 1
+ 00000 0 0 2 &mpic 1 1
+ 00000 0 0 3 &mpic 2 1
+ 00000 0 0 4 &mpic 3 1>;
+
+ interrupt-parent = <&mpic>;
+ interrupts = <1a 2>;
+ bus-range = <0 ff>;
+ ranges = <02000000 0 a0000000 a0000000 0 20000000
+ 01000000 0 00000000 e3000000 0 08000000>;
+ clock-frequency = <1fca055>;
+ #interrupt-cells = <1>;
+ #size-cells = <2>;
+ #address-cells = <3>;
+ reg = <a000 1000>;
+ compatible = "fsl,mpc8548-pcie";
+ device_type = "pci";
+ };
+
serial@4600 {
device_type = "serial";
compatible = "ns16550";
interrupt-parent = <&mpic>;
};
- pci@8000 {
- compatible = "86xx";
+ pcie@8000 {
+ compatible = "fsl,mpc8641-pcie";
device_type = "pci";
#interrupt-cells = <1>;
#size-cells = <2>;
};
- pci@9000 {
- compatible = "86xx";
+ pcie@9000 {
+ compatible = "fsl,mpc8641-pcie";
device_type = "pci";
#interrupt-cells = <1>;
#size-cells = <2>;
#
# Automatically generated make config: don't edit
-# Linux kernel version: 2.6.22-rc7
-# Sun Jul 1 23:56:58 2007
+# Linux kernel version: 2.6.22
+# Fri Jul 20 14:09:13 2007
#
# CONFIG_PPC64 is not set
+
+#
+# Processor support
+#
+# CONFIG_6xx is not set
+CONFIG_PPC_85xx=y
+# CONFIG_PPC_8xx is not set
+# CONFIG_40x is not set
+# CONFIG_44x is not set
+# CONFIG_E200 is not set
+CONFIG_85xx=y
+CONFIG_E500=y
+CONFIG_BOOKE=y
+CONFIG_FSL_BOOKE=y
+# CONFIG_PHYS_64BIT is not set
+# CONFIG_SPE is not set
+# CONFIG_PPC_MM_SLICES is not set
CONFIG_PPC32=y
CONFIG_PPC_MERGE=y
CONFIG_MMU=y
CONFIG_GENERIC_HWEIGHT=y
CONFIG_GENERIC_CALIBRATE_DELAY=y
CONFIG_GENERIC_FIND_NEXT_BIT=y
+# CONFIG_ARCH_NO_VIRT_TO_BUS is not set
CONFIG_PPC=y
CONFIG_EARLY_PRINTK=y
CONFIG_GENERIC_NVRAM=y
CONFIG_AUDIT_ARCH=y
CONFIG_GENERIC_BUG=y
CONFIG_DEFAULT_UIMAGE=y
-
-#
-# Processor support
-#
-# CONFIG_CLASSIC32 is not set
-# CONFIG_PPC_82xx is not set
-# CONFIG_PPC_83xx is not set
-CONFIG_PPC_85xx=y
-# CONFIG_PPC_86xx is not set
-# CONFIG_PPC_8xx is not set
-# CONFIG_40x is not set
-# CONFIG_44x is not set
-# CONFIG_E200 is not set
-CONFIG_85xx=y
-CONFIG_E500=y
# CONFIG_PPC_DCR_NATIVE is not set
# CONFIG_PPC_DCR_MMIO is not set
-CONFIG_BOOKE=y
-CONFIG_FSL_BOOKE=y
-# CONFIG_PHYS_64BIT is not set
-# CONFIG_SPE is not set
-# CONFIG_PPC_MM_SLICES is not set
CONFIG_DEFCONFIG_LIST="/lib/modules/$UNAME_RELEASE/.config"
#
CONFIG_LOCALVERSION_AUTO=y
CONFIG_SWAP=y
CONFIG_SYSVIPC=y
-CONFIG_IPC_NS=y
CONFIG_SYSVIPC_SYSCTL=y
CONFIG_POSIX_MQUEUE=y
CONFIG_BSD_PROCESS_ACCT=y
# CONFIG_BSD_PROCESS_ACCT_V3 is not set
# CONFIG_TASKSTATS is not set
-# CONFIG_UTS_NS is not set
+# CONFIG_USER_NS is not set
CONFIG_AUDIT=y
# CONFIG_AUDITSYSCALL is not set
CONFIG_IKCONFIG=y
CONFIG_KALLSYMS=y
CONFIG_KALLSYMS_ALL=y
# CONFIG_KALLSYMS_EXTRA_PASS is not set
-# CONFIG_HOTPLUG is not set
+CONFIG_HOTPLUG=y
CONFIG_PRINTK=y
CONFIG_BUG=y
CONFIG_ELF_CORE=y
CONFIG_RT_MUTEXES=y
# CONFIG_TINY_SHMEM is not set
CONFIG_BASE_SMALL=0
-
-#
-# Loadable module support
-#
CONFIG_MODULES=y
CONFIG_MODULE_UNLOAD=y
CONFIG_MODULE_FORCE_UNLOAD=y
CONFIG_MODVERSIONS=y
# CONFIG_MODULE_SRCVERSION_ALL is not set
CONFIG_KMOD=y
-
-#
-# Block layer
-#
CONFIG_BLOCK=y
CONFIG_LBD=y
# CONFIG_BLK_DEV_IO_TRACE is not set
# CONFIG_LSF is not set
+# CONFIG_BLK_DEV_BSG is not set
#
# IO Schedulers
CONFIG_MPC85xx=y
CONFIG_MPIC=y
# CONFIG_MPIC_WEIRD is not set
-# CONFIG_PPC_I8259 is not set
+CONFIG_PPC_I8259=y
# CONFIG_PPC_RTAS is not set
# CONFIG_MMIO_NVRAM is not set
# CONFIG_PPC_MPC106 is not set
CONFIG_SPLIT_PTLOCK_CPUS=4
# CONFIG_RESOURCES_64BIT is not set
CONFIG_ZONE_DMA_FLAG=1
+CONFIG_BOUNCE=y
+CONFIG_VIRT_TO_BUS=y
CONFIG_PROC_DEVICETREE=y
CONFIG_CMDLINE_BOOL=y
CONFIG_CMDLINE="root=/dev/sda3 rw console=ttyS0,115200"
#
CONFIG_ZONE_DMA=y
CONFIG_PPC_INDIRECT_PCI=y
-CONFIG_PPC_INDIRECT_PCI_BE=y
CONFIG_FSL_SOC=y
-# CONFIG_PCI is not set
-# CONFIG_PCI_DOMAINS is not set
-# CONFIG_ARCH_SUPPORTS_MSI is not set
+CONFIG_FSL_PCI=y
+CONFIG_PCI=y
+CONFIG_PCI_DOMAINS=y
+CONFIG_PCI_SYSCALL=y
+# CONFIG_PCIEPORTBUS is not set
+CONFIG_ARCH_SUPPORTS_MSI=y
+# CONFIG_PCI_MSI is not set
+# CONFIG_PCI_DEBUG is not set
#
# PCCARD (PCMCIA/CardBus) support
#
+# CONFIG_PCCARD is not set
+# CONFIG_HOTPLUG_PCI is not set
#
# Advanced setup
CONFIG_IP_FIB_HASH=y
CONFIG_IP_MULTIPLE_TABLES=y
CONFIG_IP_ROUTE_MULTIPATH=y
-# CONFIG_IP_ROUTE_MULTIPATH_CACHED is not set
CONFIG_IP_ROUTE_VERBOSE=y
CONFIG_IP_PNP=y
CONFIG_IP_PNP_DHCP=y
# CONFIG_MAC80211 is not set
# CONFIG_IEEE80211 is not set
# CONFIG_RFKILL is not set
+# CONFIG_NET_9P is not set
#
# Device Drivers
#
CONFIG_STANDALONE=y
CONFIG_PREVENT_FIRMWARE_BUILD=y
+# CONFIG_FW_LOADER is not set
# CONFIG_DEBUG_DRIVER is not set
# CONFIG_DEBUG_DEVRES is not set
# CONFIG_SYS_HYPERVISOR is not set
-
-#
-# Connector - unified userspace <-> kernelspace linker
-#
# CONFIG_CONNECTOR is not set
# CONFIG_MTD is not set
-
-#
-# Parallel port support
-#
# CONFIG_PARPORT is not set
-
-#
-# Plug and Play support
-#
-# CONFIG_PNPACPI is not set
-
-#
-# Block devices
-#
+CONFIG_BLK_DEV=y
# CONFIG_BLK_DEV_FD is not set
+# CONFIG_BLK_CPQ_DA is not set
+# CONFIG_BLK_CPQ_CISS_DA is not set
+# CONFIG_BLK_DEV_DAC960 is not set
+# CONFIG_BLK_DEV_UMEM is not set
# CONFIG_BLK_DEV_COW_COMMON is not set
CONFIG_BLK_DEV_LOOP=y
# CONFIG_BLK_DEV_CRYPTOLOOP is not set
CONFIG_BLK_DEV_NBD=y
+# CONFIG_BLK_DEV_SX8 is not set
CONFIG_BLK_DEV_RAM=y
CONFIG_BLK_DEV_RAM_COUNT=2
CONFIG_BLK_DEV_RAM_SIZE=16384
CONFIG_BLK_DEV_RAM_BLOCKSIZE=1024
# CONFIG_CDROM_PKTCDVD is not set
# CONFIG_ATA_OVER_ETH is not set
-
-#
-# Misc devices
-#
-# CONFIG_BLINK is not set
+CONFIG_MISC_DEVICES=y
+# CONFIG_PHANTOM is not set
+# CONFIG_EEPROM_93CX6 is not set
+# CONFIG_SGI_IOC4 is not set
+# CONFIG_TIFM_CORE is not set
# CONFIG_IDE is not set
#
#
# CONFIG_RAID_ATTRS is not set
CONFIG_SCSI=y
+CONFIG_SCSI_DMA=y
# CONFIG_SCSI_TGT is not set
# CONFIG_SCSI_NETLINK is not set
CONFIG_SCSI_PROC_FS=y
# SCSI low-level drivers
#
# CONFIG_ISCSI_TCP is not set
+# CONFIG_BLK_DEV_3W_XXXX_RAID is not set
+# CONFIG_SCSI_3W_9XXX is not set
+# CONFIG_SCSI_ACARD is not set
+# CONFIG_SCSI_AACRAID is not set
+# CONFIG_SCSI_AIC7XXX is not set
+# CONFIG_SCSI_AIC7XXX_OLD is not set
+# CONFIG_SCSI_AIC79XX is not set
+# CONFIG_SCSI_AIC94XX is not set
+# CONFIG_SCSI_DPT_I2O is not set
+# CONFIG_SCSI_ARCMSR is not set
+# CONFIG_MEGARAID_NEWGEN is not set
+# CONFIG_MEGARAID_LEGACY is not set
+# CONFIG_MEGARAID_SAS is not set
+# CONFIG_SCSI_HPTIOP is not set
+# CONFIG_SCSI_BUSLOGIC is not set
+# CONFIG_SCSI_DMX3191D is not set
+# CONFIG_SCSI_EATA is not set
+# CONFIG_SCSI_FUTURE_DOMAIN is not set
+# CONFIG_SCSI_GDTH is not set
+# CONFIG_SCSI_IPS is not set
+# CONFIG_SCSI_INITIO is not set
+# CONFIG_SCSI_INIA100 is not set
+# CONFIG_SCSI_STEX is not set
+# CONFIG_SCSI_SYM53C8XX_2 is not set
+# CONFIG_SCSI_IPR is not set
+# CONFIG_SCSI_QLOGIC_1280 is not set
+# CONFIG_SCSI_QLA_FC is not set
+# CONFIG_SCSI_QLA_ISCSI is not set
+# CONFIG_SCSI_LPFC is not set
+# CONFIG_SCSI_DC395x is not set
+# CONFIG_SCSI_DC390T is not set
+# CONFIG_SCSI_NSP32 is not set
# CONFIG_SCSI_DEBUG is not set
+# CONFIG_SCSI_SRP is not set
CONFIG_ATA=y
# CONFIG_ATA_NONSTANDARD is not set
+# CONFIG_SATA_AHCI is not set
+# CONFIG_SATA_SVW is not set
+# CONFIG_ATA_PIIX is not set
+# CONFIG_SATA_MV is not set
+# CONFIG_SATA_NV is not set
+# CONFIG_PDC_ADMA is not set
+# CONFIG_SATA_QSTOR is not set
+# CONFIG_SATA_PROMISE is not set
+# CONFIG_SATA_SX4 is not set
+# CONFIG_SATA_SIL is not set
+# CONFIG_SATA_SIL24 is not set
+# CONFIG_SATA_SIS is not set
+# CONFIG_SATA_ULI is not set
+# CONFIG_SATA_VIA is not set
+# CONFIG_SATA_VITESSE is not set
+# CONFIG_SATA_INIC162X is not set
+# CONFIG_PATA_ALI is not set
+# CONFIG_PATA_AMD is not set
+# CONFIG_PATA_ARTOP is not set
+# CONFIG_PATA_ATIIXP is not set
+# CONFIG_PATA_CMD640_PCI is not set
+# CONFIG_PATA_CMD64X is not set
+# CONFIG_PATA_CS5520 is not set
+# CONFIG_PATA_CS5530 is not set
+# CONFIG_PATA_CYPRESS is not set
+# CONFIG_PATA_EFAR is not set
+# CONFIG_ATA_GENERIC is not set
+# CONFIG_PATA_HPT366 is not set
+# CONFIG_PATA_HPT37X is not set
+# CONFIG_PATA_HPT3X2N is not set
+# CONFIG_PATA_HPT3X3 is not set
+# CONFIG_PATA_IT821X is not set
+# CONFIG_PATA_IT8213 is not set
+# CONFIG_PATA_JMICRON is not set
+# CONFIG_PATA_TRIFLEX is not set
+# CONFIG_PATA_MARVELL is not set
+# CONFIG_PATA_MPIIX is not set
+# CONFIG_PATA_OLDPIIX is not set
+# CONFIG_PATA_NETCELL is not set
+# CONFIG_PATA_NS87410 is not set
+# CONFIG_PATA_OPTI is not set
+# CONFIG_PATA_OPTIDMA is not set
+# CONFIG_PATA_PDC_OLD is not set
+# CONFIG_PATA_RADISYS is not set
+# CONFIG_PATA_RZ1000 is not set
+# CONFIG_PATA_SC1200 is not set
+# CONFIG_PATA_SERVERWORKS is not set
+# CONFIG_PATA_PDC2027X is not set
+# CONFIG_PATA_SIL680 is not set
+# CONFIG_PATA_SIS is not set
+# CONFIG_PATA_VIA is not set
+# CONFIG_PATA_WINBOND is not set
# CONFIG_PATA_PLATFORM is not set
+# CONFIG_MD is not set
#
-# Multi-device support (RAID and LVM)
+# Fusion MPT device support
#
-# CONFIG_MD is not set
-# CONFIG_MACINTOSH_DRIVERS is not set
+# CONFIG_FUSION is not set
+# CONFIG_FUSION_SPI is not set
+# CONFIG_FUSION_FC is not set
+# CONFIG_FUSION_SAS is not set
#
-# Network device support
+# IEEE 1394 (FireWire) support
#
+# CONFIG_FIREWIRE is not set
+# CONFIG_IEEE1394 is not set
+# CONFIG_I2O is not set
+# CONFIG_MACINTOSH_DRIVERS is not set
CONFIG_NETDEVICES=y
+# CONFIG_NETDEVICES_MULTIQUEUE is not set
# CONFIG_DUMMY is not set
# CONFIG_BONDING is not set
+# CONFIG_MACVLAN is not set
# CONFIG_EQUALIZER is not set
# CONFIG_TUN is not set
+# CONFIG_ARCNET is not set
CONFIG_PHYLIB=y
#
CONFIG_VITESSE_PHY=y
# CONFIG_SMSC_PHY is not set
# CONFIG_BROADCOM_PHY is not set
+# CONFIG_ICPLUS_PHY is not set
# CONFIG_FIXED_PHY is not set
-
-#
-# Ethernet (10 or 100Mbit)
-#
CONFIG_NET_ETHERNET=y
CONFIG_MII=y
+# CONFIG_HAPPYMEAL is not set
+# CONFIG_SUNGEM is not set
+# CONFIG_CASSINI is not set
+# CONFIG_NET_VENDOR_3COM is not set
+# CONFIG_NET_TULIP is not set
+# CONFIG_HP100 is not set
+# CONFIG_NET_PCI is not set
CONFIG_NETDEV_1000=y
+# CONFIG_ACENIC is not set
+# CONFIG_DL2K is not set
+# CONFIG_E1000 is not set
+# CONFIG_NS83820 is not set
+# CONFIG_HAMACHI is not set
+# CONFIG_YELLOWFIN is not set
+# CONFIG_R8169 is not set
+# CONFIG_SIS190 is not set
+# CONFIG_SKGE is not set
+# CONFIG_SKY2 is not set
+# CONFIG_VIA_VELOCITY is not set
+# CONFIG_TIGON3 is not set
+# CONFIG_BNX2 is not set
CONFIG_GIANFAR=y
CONFIG_GFAR_NAPI=y
+# CONFIG_QLA3XXX is not set
+# CONFIG_ATL1 is not set
CONFIG_NETDEV_10000=y
+# CONFIG_CHELSIO_T1 is not set
+# CONFIG_CHELSIO_T3 is not set
+# CONFIG_IXGB is not set
+# CONFIG_S2IO is not set
+# CONFIG_MYRI10GE is not set
+# CONFIG_NETXEN_NIC is not set
+# CONFIG_MLX4_CORE is not set
+# CONFIG_TR is not set
#
# Wireless LAN
# CONFIG_WLAN_PRE80211 is not set
# CONFIG_WLAN_80211 is not set
# CONFIG_WAN is not set
+# CONFIG_FDDI is not set
+# CONFIG_HIPPI is not set
# CONFIG_PPP is not set
# CONFIG_SLIP is not set
+# CONFIG_NET_FC is not set
# CONFIG_SHAPER is not set
# CONFIG_NETCONSOLE is not set
# CONFIG_NETPOLL is not set
# CONFIG_NET_POLL_CONTROLLER is not set
-
-#
-# ISDN subsystem
-#
# CONFIG_ISDN is not set
-
-#
-# Telephony Support
-#
# CONFIG_PHONE is not set
#
CONFIG_SERIO=y
CONFIG_SERIO_I8042=y
CONFIG_SERIO_SERPORT=y
+# CONFIG_SERIO_PCIPS2 is not set
CONFIG_SERIO_LIBPS2=y
# CONFIG_SERIO_RAW is not set
# CONFIG_GAMEPORT is not set
#
CONFIG_SERIAL_8250=y
CONFIG_SERIAL_8250_CONSOLE=y
+CONFIG_SERIAL_8250_PCI=y
CONFIG_SERIAL_8250_NR_UARTS=4
CONFIG_SERIAL_8250_RUNTIME_UARTS=4
# CONFIG_SERIAL_8250_EXTENDED is not set
# CONFIG_SERIAL_UARTLITE is not set
CONFIG_SERIAL_CORE=y
CONFIG_SERIAL_CORE_CONSOLE=y
+# CONFIG_SERIAL_JSM is not set
# CONFIG_SERIAL_OF_PLATFORM is not set
CONFIG_UNIX98_PTYS=y
CONFIG_LEGACY_PTYS=y
CONFIG_LEGACY_PTY_COUNT=256
-
-#
-# IPMI
-#
# CONFIG_IPMI_HANDLER is not set
# CONFIG_WATCHDOG is not set
# CONFIG_HW_RANDOM is not set
CONFIG_GEN_RTC=y
CONFIG_GEN_RTC_X=y
# CONFIG_R3964 is not set
+# CONFIG_APPLICOM is not set
+# CONFIG_AGP is not set
+# CONFIG_DRM is not set
# CONFIG_RAW_DRIVER is not set
-
-#
-# TPM devices
-#
# CONFIG_TCG_TPM is not set
+CONFIG_DEVPORT=y
# CONFIG_I2C is not set
#
#
# CONFIG_SPI is not set
# CONFIG_SPI_MASTER is not set
-
-#
-# Dallas's 1-wire bus
-#
# CONFIG_W1 is not set
+# CONFIG_POWER_SUPPLY is not set
# CONFIG_HWMON is not set
#
# Sound
#
# CONFIG_SOUND is not set
-
-#
-# HID Devices
-#
+CONFIG_HID_SUPPORT=y
CONFIG_HID=y
# CONFIG_HID_DEBUG is not set
-
-#
-# USB support
-#
-# CONFIG_USB_ARCH_HAS_HCD is not set
-# CONFIG_USB_ARCH_HAS_OHCI is not set
-# CONFIG_USB_ARCH_HAS_EHCI is not set
+CONFIG_USB_SUPPORT=y
+CONFIG_USB_ARCH_HAS_HCD=y
+CONFIG_USB_ARCH_HAS_OHCI=y
+CONFIG_USB_ARCH_HAS_EHCI=y
+# CONFIG_USB is not set
#
# NOTE: USB_STORAGE enables SCSI, and 'SCSI disk support'
#
# LED Triggers
#
-
-#
-# InfiniBand support
-#
-
-#
-# EDAC - error detection and reporting (RAS) (EXPERIMENTAL)
-#
+# CONFIG_INFINIBAND is not set
#
# Real Time Clock
# CONFIG_RTC_INTF_DEV_UIE_EMUL is not set
# CONFIG_RTC_DRV_TEST is not set
-#
-# I2C RTC drivers
-#
-
-#
-# SPI RTC drivers
-#
-
#
# Platform RTC drivers
#
+# CONFIG_RTC_DRV_CMOS is not set
# CONFIG_RTC_DRV_DS1553 is not set
# CONFIG_RTC_DRV_DS1742 is not set
# CONFIG_RTC_DRV_M48T86 is not set
+# CONFIG_RTC_DRV_M48T59 is not set
# CONFIG_RTC_DRV_V3020 is not set
#
# DMA Devices
#
+#
+# Userspace I/O
+#
+# CONFIG_UIO is not set
+
#
# File systems
#
# CONFIG_NCP_FS is not set
# CONFIG_CODA_FS is not set
# CONFIG_AFS_FS is not set
-# CONFIG_9P_FS is not set
#
# Partition Types
# CONFIG_CRC16 is not set
# CONFIG_CRC_ITU_T is not set
CONFIG_CRC32=y
+# CONFIG_CRC7 is not set
CONFIG_LIBCRC32C=m
CONFIG_ZLIB_INFLATE=y
CONFIG_PLIST=y
CONFIG_DEBUG_KERNEL=y
# CONFIG_DEBUG_SHIRQ is not set
CONFIG_DETECT_SOFTLOCKUP=y
+CONFIG_SCHED_DEBUG=y
# CONFIG_SCHEDSTATS is not set
# CONFIG_TIMER_STATS is not set
# CONFIG_DEBUG_SLAB is not set
#
# CONFIG_KEYS is not set
# CONFIG_SECURITY is not set
-
-#
-# Cryptographic options
-#
CONFIG_CRYPTO=y
CONFIG_CRYPTO_ALGAPI=y
CONFIG_CRYPTO_BLKCIPHER=y
# CONFIG_CRYPTO_CRC32C is not set
# CONFIG_CRYPTO_CAMELLIA is not set
# CONFIG_CRYPTO_TEST is not set
-
-#
-# Hardware crypto devices
-#
+CONFIG_CRYPTO_HW=y
#
# Automatically generated make config: don't edit
-# Linux kernel version: 2.6.22-rc7
-# Sun Jul 1 23:56:59 2007
+# Linux kernel version: 2.6.22
+# Fri Jul 20 13:55:04 2007
#
# CONFIG_PPC64 is not set
+
+#
+# Processor support
+#
+# CONFIG_6xx is not set
+CONFIG_PPC_85xx=y
+# CONFIG_PPC_8xx is not set
+# CONFIG_40x is not set
+# CONFIG_44x is not set
+# CONFIG_E200 is not set
+CONFIG_85xx=y
+CONFIG_E500=y
+CONFIG_BOOKE=y
+CONFIG_FSL_BOOKE=y
+# CONFIG_PHYS_64BIT is not set
+CONFIG_SPE=y
+# CONFIG_PPC_MM_SLICES is not set
CONFIG_PPC32=y
CONFIG_PPC_MERGE=y
CONFIG_MMU=y
CONFIG_GENERIC_HWEIGHT=y
CONFIG_GENERIC_CALIBRATE_DELAY=y
CONFIG_GENERIC_FIND_NEXT_BIT=y
+# CONFIG_ARCH_NO_VIRT_TO_BUS is not set
CONFIG_PPC=y
CONFIG_EARLY_PRINTK=y
CONFIG_GENERIC_NVRAM=y
CONFIG_AUDIT_ARCH=y
CONFIG_GENERIC_BUG=y
CONFIG_DEFAULT_UIMAGE=y
-
-#
-# Processor support
-#
-# CONFIG_CLASSIC32 is not set
-# CONFIG_PPC_82xx is not set
-# CONFIG_PPC_83xx is not set
-CONFIG_PPC_85xx=y
-# CONFIG_PPC_86xx is not set
-# CONFIG_PPC_8xx is not set
-# CONFIG_40x is not set
-# CONFIG_44x is not set
-# CONFIG_E200 is not set
-CONFIG_85xx=y
-CONFIG_E500=y
# CONFIG_PPC_DCR_NATIVE is not set
# CONFIG_PPC_DCR_MMIO is not set
-CONFIG_BOOKE=y
-CONFIG_FSL_BOOKE=y
-# CONFIG_PHYS_64BIT is not set
-CONFIG_SPE=y
-# CONFIG_PPC_MM_SLICES is not set
CONFIG_DEFCONFIG_LIST="/lib/modules/$UNAME_RELEASE/.config"
#
CONFIG_LOCALVERSION_AUTO=y
CONFIG_SWAP=y
CONFIG_SYSVIPC=y
-# CONFIG_IPC_NS is not set
CONFIG_SYSVIPC_SYSCTL=y
# CONFIG_POSIX_MQUEUE is not set
# CONFIG_BSD_PROCESS_ACCT is not set
# CONFIG_TASKSTATS is not set
-# CONFIG_UTS_NS is not set
+# CONFIG_USER_NS is not set
# CONFIG_AUDIT is not set
# CONFIG_IKCONFIG is not set
CONFIG_LOG_BUF_SHIFT=14
CONFIG_RT_MUTEXES=y
# CONFIG_TINY_SHMEM is not set
CONFIG_BASE_SMALL=0
-
-#
-# Loadable module support
-#
CONFIG_MODULES=y
CONFIG_MODULE_UNLOAD=y
# CONFIG_MODULE_FORCE_UNLOAD is not set
# CONFIG_MODVERSIONS is not set
# CONFIG_MODULE_SRCVERSION_ALL is not set
# CONFIG_KMOD is not set
-
-#
-# Block layer
-#
CONFIG_BLOCK=y
# CONFIG_LBD is not set
# CONFIG_BLK_DEV_IO_TRACE is not set
# CONFIG_LSF is not set
+# CONFIG_BLK_DEV_BSG is not set
#
# IO Schedulers
CONFIG_SPLIT_PTLOCK_CPUS=4
# CONFIG_RESOURCES_64BIT is not set
CONFIG_ZONE_DMA_FLAG=1
+CONFIG_BOUNCE=y
+CONFIG_VIRT_TO_BUS=y
CONFIG_PROC_DEVICETREE=y
# CONFIG_CMDLINE_BOOL is not set
# CONFIG_PM is not set
CONFIG_PPC_INDIRECT_PCI=y
CONFIG_PPC_INDIRECT_PCI_BE=y
CONFIG_FSL_SOC=y
-# CONFIG_PCI is not set
-# CONFIG_PCI_DOMAINS is not set
-# CONFIG_ARCH_SUPPORTS_MSI is not set
+CONFIG_FSL_PCI=y
+CONFIG_PCI=y
+CONFIG_PCI_DOMAINS=y
+CONFIG_PCI_SYSCALL=y
+# CONFIG_PCIEPORTBUS is not set
+CONFIG_ARCH_SUPPORTS_MSI=y
+# CONFIG_PCI_MSI is not set
+# CONFIG_PCI_DEBUG is not set
#
# PCCARD (PCMCIA/CardBus) support
#
# CONFIG_PCCARD is not set
+# CONFIG_HOTPLUG_PCI is not set
#
# Advanced setup
# CONFIG_MAC80211 is not set
# CONFIG_IEEE80211 is not set
# CONFIG_RFKILL is not set
+# CONFIG_NET_9P is not set
#
# Device Drivers
# CONFIG_DEBUG_DRIVER is not set
# CONFIG_DEBUG_DEVRES is not set
# CONFIG_SYS_HYPERVISOR is not set
-
-#
-# Connector - unified userspace <-> kernelspace linker
-#
# CONFIG_CONNECTOR is not set
# CONFIG_MTD is not set
-
-#
-# Parallel port support
-#
# CONFIG_PARPORT is not set
-
-#
-# Plug and Play support
-#
-# CONFIG_PNPACPI is not set
-
-#
-# Block devices
-#
+CONFIG_BLK_DEV=y
# CONFIG_BLK_DEV_FD is not set
+# CONFIG_BLK_CPQ_DA is not set
+# CONFIG_BLK_CPQ_CISS_DA is not set
+# CONFIG_BLK_DEV_DAC960 is not set
+# CONFIG_BLK_DEV_UMEM is not set
# CONFIG_BLK_DEV_COW_COMMON is not set
CONFIG_BLK_DEV_LOOP=y
# CONFIG_BLK_DEV_CRYPTOLOOP is not set
# CONFIG_BLK_DEV_NBD is not set
+# CONFIG_BLK_DEV_SX8 is not set
CONFIG_BLK_DEV_RAM=y
CONFIG_BLK_DEV_RAM_COUNT=16
CONFIG_BLK_DEV_RAM_SIZE=32768
CONFIG_BLK_DEV_RAM_BLOCKSIZE=1024
# CONFIG_CDROM_PKTCDVD is not set
# CONFIG_ATA_OVER_ETH is not set
-
-#
-# Misc devices
-#
-# CONFIG_BLINK is not set
+CONFIG_MISC_DEVICES=y
+# CONFIG_PHANTOM is not set
+# CONFIG_EEPROM_93CX6 is not set
+# CONFIG_SGI_IOC4 is not set
+# CONFIG_TIFM_CORE is not set
# CONFIG_IDE is not set
#
#
# CONFIG_RAID_ATTRS is not set
CONFIG_SCSI=y
+CONFIG_SCSI_DMA=y
# CONFIG_SCSI_TGT is not set
# CONFIG_SCSI_NETLINK is not set
CONFIG_SCSI_PROC_FS=y
# SCSI low-level drivers
#
# CONFIG_ISCSI_TCP is not set
+# CONFIG_BLK_DEV_3W_XXXX_RAID is not set
+# CONFIG_SCSI_3W_9XXX is not set
+# CONFIG_SCSI_ACARD is not set
+# CONFIG_SCSI_AACRAID is not set
+# CONFIG_SCSI_AIC7XXX is not set
+# CONFIG_SCSI_AIC7XXX_OLD is not set
+# CONFIG_SCSI_AIC79XX is not set
+# CONFIG_SCSI_AIC94XX is not set
+# CONFIG_SCSI_DPT_I2O is not set
+# CONFIG_SCSI_ARCMSR is not set
+# CONFIG_MEGARAID_NEWGEN is not set
+# CONFIG_MEGARAID_LEGACY is not set
+# CONFIG_MEGARAID_SAS is not set
+# CONFIG_SCSI_HPTIOP is not set
+# CONFIG_SCSI_BUSLOGIC is not set
+# CONFIG_SCSI_DMX3191D is not set
+# CONFIG_SCSI_EATA is not set
+# CONFIG_SCSI_FUTURE_DOMAIN is not set
+# CONFIG_SCSI_GDTH is not set
+# CONFIG_SCSI_IPS is not set
+# CONFIG_SCSI_INITIO is not set
+# CONFIG_SCSI_INIA100 is not set
+# CONFIG_SCSI_STEX is not set
+# CONFIG_SCSI_SYM53C8XX_2 is not set
+# CONFIG_SCSI_QLOGIC_1280 is not set
+# CONFIG_SCSI_QLA_FC is not set
+# CONFIG_SCSI_QLA_ISCSI is not set
+# CONFIG_SCSI_LPFC is not set
+# CONFIG_SCSI_DC395x is not set
+# CONFIG_SCSI_DC390T is not set
+# CONFIG_SCSI_NSP32 is not set
# CONFIG_SCSI_DEBUG is not set
+# CONFIG_SCSI_SRP is not set
# CONFIG_ATA is not set
+# CONFIG_MD is not set
#
-# Multi-device support (RAID and LVM)
+# Fusion MPT device support
#
-# CONFIG_MD is not set
-# CONFIG_MACINTOSH_DRIVERS is not set
+# CONFIG_FUSION is not set
+# CONFIG_FUSION_SPI is not set
+# CONFIG_FUSION_FC is not set
+# CONFIG_FUSION_SAS is not set
#
-# Network device support
+# IEEE 1394 (FireWire) support
#
+# CONFIG_FIREWIRE is not set
+# CONFIG_IEEE1394 is not set
+# CONFIG_I2O is not set
+# CONFIG_MACINTOSH_DRIVERS is not set
CONFIG_NETDEVICES=y
+# CONFIG_NETDEVICES_MULTIQUEUE is not set
# CONFIG_DUMMY is not set
# CONFIG_BONDING is not set
+# CONFIG_MACVLAN is not set
# CONFIG_EQUALIZER is not set
# CONFIG_TUN is not set
+# CONFIG_ARCNET is not set
CONFIG_PHYLIB=y
#
# CONFIG_VITESSE_PHY is not set
# CONFIG_SMSC_PHY is not set
# CONFIG_BROADCOM_PHY is not set
+# CONFIG_ICPLUS_PHY is not set
# CONFIG_FIXED_PHY is not set
-
-#
-# Ethernet (10 or 100Mbit)
-#
CONFIG_NET_ETHERNET=y
CONFIG_MII=y
+# CONFIG_HAPPYMEAL is not set
+# CONFIG_SUNGEM is not set
+# CONFIG_CASSINI is not set
+# CONFIG_NET_VENDOR_3COM is not set
+# CONFIG_NET_TULIP is not set
+# CONFIG_HP100 is not set
+# CONFIG_NET_PCI is not set
CONFIG_NETDEV_1000=y
+# CONFIG_ACENIC is not set
+# CONFIG_DL2K is not set
+# CONFIG_E1000 is not set
+# CONFIG_NS83820 is not set
+# CONFIG_HAMACHI is not set
+# CONFIG_YELLOWFIN is not set
+# CONFIG_R8169 is not set
+# CONFIG_SIS190 is not set
+# CONFIG_SKGE is not set
+# CONFIG_SKY2 is not set
+# CONFIG_VIA_VELOCITY is not set
+# CONFIG_TIGON3 is not set
+# CONFIG_BNX2 is not set
CONFIG_GIANFAR=y
CONFIG_GFAR_NAPI=y
+# CONFIG_QLA3XXX is not set
+# CONFIG_ATL1 is not set
CONFIG_NETDEV_10000=y
+# CONFIG_CHELSIO_T1 is not set
+# CONFIG_CHELSIO_T3 is not set
+# CONFIG_IXGB is not set
+# CONFIG_S2IO is not set
+# CONFIG_MYRI10GE is not set
+# CONFIG_NETXEN_NIC is not set
+# CONFIG_MLX4_CORE is not set
+# CONFIG_TR is not set
#
# Wireless LAN
# CONFIG_WLAN_PRE80211 is not set
# CONFIG_WLAN_80211 is not set
# CONFIG_WAN is not set
+# CONFIG_FDDI is not set
+# CONFIG_HIPPI is not set
# CONFIG_PPP is not set
# CONFIG_SLIP is not set
+# CONFIG_NET_FC is not set
# CONFIG_SHAPER is not set
# CONFIG_NETCONSOLE is not set
# CONFIG_NETPOLL is not set
# CONFIG_NET_POLL_CONTROLLER is not set
-
-#
-# ISDN subsystem
-#
# CONFIG_ISDN is not set
-
-#
-# Telephony Support
-#
# CONFIG_PHONE is not set
#
#
CONFIG_SERIAL_8250=y
CONFIG_SERIAL_8250_CONSOLE=y
+CONFIG_SERIAL_8250_PCI=y
CONFIG_SERIAL_8250_NR_UARTS=4
CONFIG_SERIAL_8250_RUNTIME_UARTS=4
# CONFIG_SERIAL_8250_EXTENDED is not set
# CONFIG_SERIAL_UARTLITE is not set
CONFIG_SERIAL_CORE=y
CONFIG_SERIAL_CORE_CONSOLE=y
+# CONFIG_SERIAL_JSM is not set
# CONFIG_SERIAL_OF_PLATFORM is not set
CONFIG_UNIX98_PTYS=y
CONFIG_LEGACY_PTYS=y
CONFIG_LEGACY_PTY_COUNT=256
-
-#
-# IPMI
-#
# CONFIG_IPMI_HANDLER is not set
CONFIG_WATCHDOG=y
# CONFIG_WATCHDOG_NOWAYOUT is not set
#
# CONFIG_SOFT_WATCHDOG is not set
# CONFIG_BOOKE_WDT is not set
+
+#
+# PCI-based Watchdog Cards
+#
+# CONFIG_PCIPCWATCHDOG is not set
+# CONFIG_WDTPCI is not set
CONFIG_HW_RANDOM=y
# CONFIG_NVRAM is not set
CONFIG_GEN_RTC=y
# CONFIG_GEN_RTC_X is not set
# CONFIG_R3964 is not set
+# CONFIG_APPLICOM is not set
+# CONFIG_AGP is not set
+# CONFIG_DRM is not set
# CONFIG_RAW_DRIVER is not set
-
-#
-# TPM devices
-#
# CONFIG_TCG_TPM is not set
+CONFIG_DEVPORT=y
CONFIG_I2C=y
CONFIG_I2C_BOARDINFO=y
CONFIG_I2C_CHARDEV=y
#
# I2C Hardware Bus support
#
+# CONFIG_I2C_ALI1535 is not set
+# CONFIG_I2C_ALI1563 is not set
+# CONFIG_I2C_ALI15X3 is not set
+# CONFIG_I2C_AMD756 is not set
+# CONFIG_I2C_AMD8111 is not set
+# CONFIG_I2C_I801 is not set
+# CONFIG_I2C_I810 is not set
+# CONFIG_I2C_PIIX4 is not set
CONFIG_I2C_MPC=y
+# CONFIG_I2C_NFORCE2 is not set
# CONFIG_I2C_OCORES is not set
# CONFIG_I2C_PARPORT_LIGHT is not set
+# CONFIG_I2C_PROSAVAGE is not set
+# CONFIG_I2C_SAVAGE4 is not set
# CONFIG_I2C_SIMTEC is not set
+# CONFIG_I2C_SIS5595 is not set
+# CONFIG_I2C_SIS630 is not set
+# CONFIG_I2C_SIS96X is not set
+# CONFIG_I2C_TAOS_EVM is not set
# CONFIG_I2C_STUB is not set
+# CONFIG_I2C_VIA is not set
+# CONFIG_I2C_VIAPRO is not set
+# CONFIG_I2C_VOODOO3 is not set
#
# Miscellaneous I2C Chip support
#
# CONFIG_SENSORS_DS1337 is not set
# CONFIG_SENSORS_DS1374 is not set
+# CONFIG_DS1682 is not set
# CONFIG_SENSORS_EEPROM is not set
# CONFIG_SENSORS_PCF8574 is not set
# CONFIG_SENSORS_PCA9539 is not set
# CONFIG_SENSORS_PCF8591 is not set
# CONFIG_SENSORS_M41T00 is not set
# CONFIG_SENSORS_MAX6875 is not set
+# CONFIG_SENSORS_TSL2550 is not set
# CONFIG_I2C_DEBUG_CORE is not set
# CONFIG_I2C_DEBUG_ALGO is not set
# CONFIG_I2C_DEBUG_BUS is not set
#
# CONFIG_SPI is not set
# CONFIG_SPI_MASTER is not set
-
-#
-# Dallas's 1-wire bus
-#
# CONFIG_W1 is not set
+# CONFIG_POWER_SUPPLY is not set
CONFIG_HWMON=y
# CONFIG_HWMON_VID is not set
# CONFIG_SENSORS_ABITUGURU is not set
# CONFIG_SENSORS_MAX6650 is not set
# CONFIG_SENSORS_PC87360 is not set
# CONFIG_SENSORS_PC87427 is not set
+# CONFIG_SENSORS_SIS5595 is not set
# CONFIG_SENSORS_SMSC47M1 is not set
# CONFIG_SENSORS_SMSC47M192 is not set
# CONFIG_SENSORS_SMSC47B397 is not set
+# CONFIG_SENSORS_VIA686A is not set
# CONFIG_SENSORS_VT1211 is not set
+# CONFIG_SENSORS_VT8231 is not set
# CONFIG_SENSORS_W83781D is not set
# CONFIG_SENSORS_W83791D is not set
# CONFIG_SENSORS_W83792D is not set
# Sound
#
# CONFIG_SOUND is not set
-
-#
-# HID Devices
-#
+CONFIG_HID_SUPPORT=y
CONFIG_HID=y
# CONFIG_HID_DEBUG is not set
-
-#
-# USB support
-#
-# CONFIG_USB_ARCH_HAS_HCD is not set
-# CONFIG_USB_ARCH_HAS_OHCI is not set
-# CONFIG_USB_ARCH_HAS_EHCI is not set
+CONFIG_USB_SUPPORT=y
+CONFIG_USB_ARCH_HAS_HCD=y
+CONFIG_USB_ARCH_HAS_OHCI=y
+CONFIG_USB_ARCH_HAS_EHCI=y
+# CONFIG_USB is not set
#
# NOTE: USB_STORAGE enables SCSI, and 'SCSI disk support'
#
# LED Triggers
#
-
-#
-# InfiniBand support
-#
-
-#
-# EDAC - error detection and reporting (RAS) (EXPERIMENTAL)
-#
+# CONFIG_INFINIBAND is not set
#
# Real Time Clock
# DMA Devices
#
+#
+# Userspace I/O
+#
+# CONFIG_UIO is not set
+
#
# File systems
#
# CONFIG_NCP_FS is not set
# CONFIG_CODA_FS is not set
# CONFIG_AFS_FS is not set
-# CONFIG_9P_FS is not set
#
# Partition Types
# CONFIG_CRC16 is not set
# CONFIG_CRC_ITU_T is not set
CONFIG_CRC32=y
+# CONFIG_CRC7 is not set
# CONFIG_LIBCRC32C is not set
CONFIG_PLIST=y
CONFIG_HAS_IOMEM=y
CONFIG_DEBUG_KERNEL=y
# CONFIG_DEBUG_SHIRQ is not set
CONFIG_DETECT_SOFTLOCKUP=y
+CONFIG_SCHED_DEBUG=y
# CONFIG_SCHEDSTATS is not set
# CONFIG_TIMER_STATS is not set
# CONFIG_DEBUG_SLAB is not set
CONFIG_DEBUGGER=y
# CONFIG_XMON is not set
# CONFIG_BDI_SWITCH is not set
-CONFIG_BOOTX_TEXT=y
+# CONFIG_BOOTX_TEXT is not set
CONFIG_PPC_EARLY_DEBUG=y
# CONFIG_PPC_EARLY_DEBUG_LPAR is not set
# CONFIG_PPC_EARLY_DEBUG_G5 is not set
#
# CONFIG_KEYS is not set
# CONFIG_SECURITY is not set
-
-#
-# Cryptographic options
-#
CONFIG_CRYPTO=y
CONFIG_CRYPTO_ALGAPI=y
CONFIG_CRYPTO_BLKCIPHER=y
# CONFIG_CRYPTO_CRC32C is not set
# CONFIG_CRYPTO_CAMELLIA is not set
# CONFIG_CRYPTO_TEST is not set
-
-#
-# Hardware crypto devices
-#
+CONFIG_CRYPTO_HW=y
mtmsrd r24 /* RI on */
lhz r24,PACAPACAINDEX(r13) /* Get processor # */
cmpwi 0,r24,0 /* Are we processor 0? */
- beq .__start_initialization_iSeries /* Start up the first processor */
- mfspr r4,SPRN_CTRLF
+ bne 1f
+ b .__start_initialization_iSeries /* Start up the first processor */
+1: mfspr r4,SPRN_CTRLF
li r5,CTRL_RUNLATCH /* Turn off the run light */
andc r4,r4,r5
mtspr SPRN_CTRLT,r4
#endif
#ifdef CONFIG_PPC_ISERIES
-_STATIC(__start_initialization_iSeries)
+_INIT_STATIC(__start_initialization_iSeries)
/* Clear out the BSS */
LOAD_REG_IMMEDIATE(r11,__bss_stop)
LOAD_REG_IMMEDIATE(r8,__bss_start)
#include <linux/pci.h>
#include <linux/mm.h>
#include <asm/io.h>
+#include <asm/pci-bridge.h>
/*
* Here comes the ppc64 implementation of the IOMAP
void pci_iounmap(struct pci_dev *dev, void __iomem *addr)
{
- /* Nothing to do */
+ if (isa_vaddr_is_ioport(addr))
+ return;
+ if (pcibios_vaddr_is_ioport(addr))
+ return;
+ iounmap(addr);
}
+
EXPORT_SYMBOL(pci_iomap);
EXPORT_SYMBOL(pci_iounmap);
}
EXPORT_SYMBOL_GPL(virq_to_hw);
-struct irq_host *irq_alloc_host(unsigned int revmap_type,
- unsigned int revmap_arg,
- struct irq_host_ops *ops,
- irq_hw_number_t inval_irq)
+__init_refok struct irq_host *irq_alloc_host(unsigned int revmap_type,
+ unsigned int revmap_arg,
+ struct irq_host_ops *ops,
+ irq_hw_number_t inval_irq)
{
struct irq_host *host;
unsigned int size = sizeof(struct irq_host);
spin_unlock(&hose_spinlock);
}
-struct pci_controller * pcibios_alloc_controller(struct device_node *dev)
+__init_refok struct pci_controller * pcibios_alloc_controller(struct device_node *dev)
{
struct pci_controller *phb;
kfree(phb);
}
+int pcibios_vaddr_is_ioport(void __iomem *address)
+{
+ int ret = 0;
+ struct pci_controller *hose;
+ unsigned long size;
+
+ spin_lock(&hose_spinlock);
+ list_for_each_entry(hose, &hose_list, list_node) {
+#ifdef CONFIG_PPC64
+ size = hose->pci_io_size;
+#else
+ size = hose->io_resource.end - hose->io_resource.start + 1;
+#endif
+ if (address >= hose->io_base_virt &&
+ address < (hose->io_base_virt + size)) {
+ ret = 1;
+ break;
+ }
+ }
+ spin_unlock(&hose_spinlock);
+ return ret;
+}
+
/*
* Return the domain number for this bus.
*/
static int pci_bus_count;
+static void
+fixup_hide_host_resource_fsl(struct pci_dev* dev)
+{
+ int i, class = dev->class >> 8;
+
+ if ((class == PCI_CLASS_PROCESSOR_POWERPC) &&
+ (dev->hdr_type == PCI_HEADER_TYPE_NORMAL) &&
+ (dev->bus->parent == NULL)) {
+ for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
+ dev->resource[i].start = 0;
+ dev->resource[i].end = 0;
+ dev->resource[i].flags = 0;
+ }
+ }
+}
+DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_MOTOROLA, PCI_ANY_ID, fixup_hide_host_resource_fsl);
+DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_FREESCALE, PCI_ANY_ID, fixup_hide_host_resource_fsl);
+
static void
fixup_broken_pcnet32(struct pci_dev* dev)
{
return 0;
}
-static void __init
-update_bridge_base(struct pci_bus *bus, int i)
+void __init
+update_bridge_resource(struct pci_dev *dev, struct resource *res)
{
- struct resource *res = bus->resource[i];
u8 io_base_lo, io_limit_lo;
u16 mem_base, mem_limit;
u16 cmd;
unsigned long start, end, off;
- struct pci_dev *dev = bus->self;
struct pci_controller *hose = dev->sysdata;
if (!hose) {
pci_write_config_word(dev, PCI_PREF_MEMORY_LIMIT, mem_limit);
} else {
- DBG(KERN_ERR "PCI: ugh, bridge %s res %d has flags=%lx\n",
- pci_name(dev), i, res->flags);
+ DBG(KERN_ERR "PCI: ugh, bridge %s res has flags=%lx\n",
+ pci_name(dev), res->flags);
}
pci_write_config_word(dev, PCI_COMMAND, cmd);
}
+static void __init
+update_bridge_base(struct pci_bus *bus, int i)
+{
+ struct resource *res = bus->resource[i];
+ struct pci_dev *dev = bus->self;
+ update_bridge_resource(dev, res);
+}
+
static inline void alloc_resource(struct pci_dev *dev, int idx)
{
struct resource *pr, *r = &dev->resource[idx];
subsys_initcall(pcibios_init);
-void __init pcibios_fixup_bus(struct pci_bus *bus)
+void pcibios_fixup_bus(struct pci_bus *bus)
{
struct pci_controller *hose = (struct pci_controller *) bus->sysdata;
unsigned long io_offset;
EARLY_PCI_OP(write, byte, u8)
EARLY_PCI_OP(write, word, u16)
EARLY_PCI_OP(write, dword, u32)
+
+extern int pci_bus_find_capability (struct pci_bus *bus, unsigned int devfn, int cap);
+int early_find_capability(struct pci_controller *hose, int bus, int devfn,
+ int cap)
+{
+ return pci_bus_find_capability(fake_pci_bus(hose, bus), devfn, cap);
+}
printk(" CR: %08lx XER: %08lx\n", regs->ccr, regs->xer);
trap = TRAP(regs);
if (trap == 0x300 || trap == 0x600)
+#if defined(CONFIG_4xx) || defined(CONFIG_BOOKE)
+ printk("DEAR: "REG", ESR: "REG"\n", regs->dar, regs->dsisr);
+#else
printk("DAR: "REG", DSISR: "REG"\n", regs->dar, regs->dsisr);
+#endif
printk("TASK = %p[%d] '%s' THREAD: %p",
current, current->pid, current->comm, task_thread_info(current));
/* Max address size we deal with */
#define OF_MAX_ADDR_CELLS 4
#define OF_CHECK_COUNTS(na, ns) ((na) > 0 && (na) <= OF_MAX_ADDR_CELLS && \
- (ns) >= 0)
+ (ns) > 0)
static struct of_bus *of_match_bus(struct device_node *np);
static int __of_address_to_resource(struct device_node *dev,
break;
}
np = of_find_node_by_type(NULL, "8042");
+ /* Pegasos has no device_type on its 8042 node, look for the
+ * name instead */
+ if (!np)
+ np = of_find_node_by_name(NULL, "8042");
break;
case FDC_BASE: /* FDC1 */
np = of_find_node_by_type(NULL, "fdc");
* Called by setup_system after ppc_md->probe and ppc_md->early_init.
* Call it again after setting udbg_putc in ppc_md->setup_arch.
*/
-void register_early_udbg_console(void)
+void __init register_early_udbg_console(void)
{
if (early_console_initialized)
return;
static long __init lmb_add_region(struct lmb_region *rgn, unsigned long base,
unsigned long size)
{
- unsigned long i, coalesced = 0;
- long adjacent;
+ unsigned long coalesced = 0;
+ long adjacent, i;
/* First try and coalesce this LMB with another. */
for (i=0; i < rgn->cnt; i++) {
setup_indirect_pci(hose,
r.start + offsetof(pci_cpm2_t, pci_cfg_addr),
- r.start + offsetof(pci_cpm2_t, pci_cfg_data));
+ r.start + offsetof(pci_cpm2_t, pci_cfg_data),
+ 0);
pci_process_bridge_OF_ranges(hose, np, 1);
}
*/
/* PCI 1 */
if ((rsrc.start & 0xfffff) == 0x8500) {
- setup_indirect_pci(hose, immr + 0x8300, immr + 0x8304);
+ setup_indirect_pci(hose, immr + 0x8300, immr + 0x8304, 0);
}
/* PCI 2 */
if ((rsrc.start & 0xfffff) == 0x8600) {
- setup_indirect_pci(hose, immr + 0x8380, immr + 0x8384);
+ setup_indirect_pci(hose, immr + 0x8380, immr + 0x8384, 0);
primary = 0;
}
config MPC85xx_CDS
bool "Freescale MPC85xx CDS"
select DEFAULT_UIMAGE
+ select PPC_I8259
help
This option enables support for the MPC85xx CDS board
config MPC8544_DS
bool "Freescale MPC8544 DS"
+ select PPC_I8259
select DEFAULT_UIMAGE
help
This option enables support for the MPC8544 DS board
config MPC85xx
bool
select PPC_UDBG_16550
- select PPC_INDIRECT_PCI
- select PPC_INDIRECT_PCI_BE
+ select PPC_INDIRECT_PCI if PCI
select MPIC
+ select FSL_PCI if PCI
select SERIAL_8250_SHARE_IRQ if SERIAL_8250
default y if MPC8540_ADS || MPC85xx_CDS || MPC8560_ADS \
|| MPC85xx_MDS || MPC8544_DS
#
# Makefile for the PowerPC 85xx linux kernel.
#
-obj-$(CONFIG_PPC_85xx) += misc.o pci.o
+obj-$(CONFIG_PPC_85xx) += misc.o
obj-$(CONFIG_MPC8540_ADS) += mpc85xx_ads.o
obj-$(CONFIG_MPC8560_ADS) += mpc85xx_ads.o
obj-$(CONFIG_MPC85xx_CDS) += mpc85xx_cds.o
* MPC8544 DS Board Setup
*
* Author Xianghua Xiao (x.xiao@freescale.com)
+ * Roy Zang <tie-fei.zang@freescale.com>
+ * - Add PCI/PCI Exprees support
* Copyright 2007 Freescale Semiconductor Inc.
*
* This program is free software; you can redistribute it and/or modify it
#include <linux/stddef.h>
#include <linux/kernel.h>
+#include <linux/pci.h>
#include <linux/kdev_t.h>
#include <linux/delay.h>
#include <linux/seq_file.h>
+#include <linux/interrupt.h>
#include <asm/system.h>
#include <asm/time.h>
#include <asm/machdep.h>
+#include <asm/pci-bridge.h>
#include <asm/mpc85xx.h>
#include <mm/mmu_decl.h>
#include <asm/prom.h>
#include <asm/i8259.h>
#include <sysdev/fsl_soc.h>
+#include <sysdev/fsl_pci.h>
#include "mpc85xx.h"
#undef DEBUG
#define DBG(fmt, args...)
#endif
+#ifdef CONFIG_PPC_I8259
+static void mpc8544_8259_cascade(unsigned int irq, struct irq_desc *desc)
+{
+ unsigned int cascade_irq = i8259_irq();
+
+ if (cascade_irq != NO_IRQ) {
+ generic_handle_irq(cascade_irq);
+ }
+ desc->chip->eoi(irq);
+}
+#endif /* CONFIG_PPC_I8259 */
void __init mpc8544_ds_pic_init(void)
{
#endif /* CONFIG_PPC_I8259 */
}
+#ifdef CONFIG_PCI
+enum pirq { PIRQA = 8, PIRQB, PIRQC, PIRQD, PIRQE, PIRQF, PIRQG, PIRQH };
+
+/*
+ * Value in table -- IRQ number
+ */
+const unsigned char uli1575_irq_route_table[16] = {
+ 0, /* 0: Reserved */
+ 0x8,
+ 0, /* 2: Reserved */
+ 0x2,
+ 0x4,
+ 0x5,
+ 0x7,
+ 0x6,
+ 0, /* 8: Reserved */
+ 0x1,
+ 0x3,
+ 0x9,
+ 0xb,
+ 0, /* 13: Reserved */
+ 0xd,
+ 0xf,
+};
+
+static int __devinit
+get_pci_irq_from_of(struct pci_controller *hose, int slot, int pin)
+{
+ struct of_irq oirq;
+ u32 laddr[3];
+ struct device_node *hosenode = hose ? hose->arch_data : NULL;
+
+ if (!hosenode)
+ return -EINVAL;
+
+ laddr[0] = (hose->first_busno << 16) | (PCI_DEVFN(slot, 0) << 8);
+ laddr[1] = laddr[2] = 0;
+ of_irq_map_raw(hosenode, &pin, 1, laddr, &oirq);
+ DBG("mpc8544_ds: pci irq addr %x, slot %d, pin %d, irq %d\n",
+ laddr[0], slot, pin, oirq.specifier[0]);
+ return oirq.specifier[0];
+}
+
+/*8259*/
+static void __devinit quirk_uli1575(struct pci_dev *dev)
+{
+ unsigned short temp;
+ struct pci_controller *hose = pci_bus_to_host(dev->bus);
+ unsigned char irq2pin[16];
+ unsigned long pirq_map_word = 0;
+ u32 irq;
+ int i;
+
+ /*
+ * ULI1575 interrupts route setup
+ */
+ memset(irq2pin, 0, 16); /* Initialize default value 0 */
+
+ irq2pin[6]=PIRQA+3; /* enabled mapping for IRQ6 to PIRQD, used by SATA */
+
+ /*
+ * PIRQE -> PIRQF mapping set manually
+ *
+ * IRQ pin IRQ#
+ * PIRQE ---- 9
+ * PIRQF ---- 10
+ * PIRQG ---- 11
+ * PIRQH ---- 12
+ */
+ for (i = 0; i < 4; i++)
+ irq2pin[i + 9] = PIRQE + i;
+
+ /* Set IRQ-PIRQ Mapping to ULI1575 */
+ for (i = 0; i < 16; i++)
+ if (irq2pin[i])
+ pirq_map_word |= (uli1575_irq_route_table[i] & 0xf)
+ << ((irq2pin[i] - PIRQA) * 4);
+
+ pirq_map_word |= 1<<26; /* disable INTx in EP mode*/
+
+ /* ULI1575 IRQ mapping conf register default value is 0xb9317542 */
+ DBG("Setup ULI1575 IRQ mapping configuration register value = 0x%x\n",
+ (int)pirq_map_word);
+ pci_write_config_dword(dev, 0x48, pirq_map_word);
+
+#define ULI1575_SET_DEV_IRQ(slot, pin, reg) \
+ do { \
+ int irq; \
+ irq = get_pci_irq_from_of(hose, slot, pin); \
+ if (irq > 0 && irq < 16) \
+ pci_write_config_byte(dev, reg, irq2pin[irq]); \
+ else \
+ printk(KERN_WARNING "ULI1575 device" \
+ "(slot %d, pin %d) irq %d is invalid.\n", \
+ slot, pin, irq); \
+ } while(0)
+
+ /* USB 1.1 OHCI controller 1, slot 28, pin 1 */
+ ULI1575_SET_DEV_IRQ(28, 1, 0x86);
+
+ /* USB 1.1 OHCI controller 2, slot 28, pin 2 */
+ ULI1575_SET_DEV_IRQ(28, 2, 0x87);
+
+ /* USB 1.1 OHCI controller 3, slot 28, pin 3 */
+ ULI1575_SET_DEV_IRQ(28, 3, 0x88);
+
+ /* USB 2.0 controller, slot 28, pin 4 */
+ irq = get_pci_irq_from_of(hose, 28, 4);
+ if (irq >= 0 && irq <= 15)
+ pci_write_config_dword(dev, 0x74, uli1575_irq_route_table[irq]);
+
+ /* Audio controller, slot 29, pin 1 */
+ ULI1575_SET_DEV_IRQ(29, 1, 0x8a);
+
+ /* Modem controller, slot 29, pin 2 */
+ ULI1575_SET_DEV_IRQ(29, 2, 0x8b);
+
+ /* HD audio controller, slot 29, pin 3 */
+ ULI1575_SET_DEV_IRQ(29, 3, 0x8c);
+
+ /* SMB interrupt: slot 30, pin 1 */
+ ULI1575_SET_DEV_IRQ(30, 1, 0x8e);
+
+ /* PMU ACPI SCI interrupt: slot 30, pin 2 */
+ ULI1575_SET_DEV_IRQ(30, 2, 0x8f);
+
+ /* Serial ATA interrupt: slot 31, pin 1 */
+ ULI1575_SET_DEV_IRQ(31, 1, 0x8d);
+
+ /* Primary PATA IDE IRQ: 14
+ * Secondary PATA IDE IRQ: 15
+ */
+ pci_write_config_byte(dev, 0x44, 0x30 | uli1575_irq_route_table[14]);
+ pci_write_config_byte(dev, 0x75, uli1575_irq_route_table[15]);
+
+ /* Set IRQ14 and IRQ15 to legacy IRQs */
+ pci_read_config_word(dev, 0x46, &temp);
+ temp |= 0xc000;
+ pci_write_config_word(dev, 0x46, temp);
+
+ /* Set i8259 interrupt trigger
+ * IRQ 3: Level
+ * IRQ 4: Level
+ * IRQ 5: Level
+ * IRQ 6: Level
+ * IRQ 7: Level
+ * IRQ 9: Level
+ * IRQ 10: Level
+ * IRQ 11: Level
+ * IRQ 12: Level
+ * IRQ 14: Edge
+ * IRQ 15: Edge
+ */
+ outb(0xfa, 0x4d0);
+ outb(0x1e, 0x4d1);
+
+#undef ULI1575_SET_DEV_IRQ
+}
+
+/* SATA */
+static void __devinit quirk_uli5288(struct pci_dev *dev)
+{
+ unsigned char c;
+
+ pci_read_config_byte(dev, 0x83, &c);
+ c |= 0x80; /* read/write lock */
+ pci_write_config_byte(dev, 0x83, c);
+
+ pci_write_config_byte(dev, 0x09, 0x01); /* Base class code: storage */
+ pci_write_config_byte(dev, 0x0a, 0x06); /* IDE disk */
+
+ pci_read_config_byte(dev, 0x83, &c);
+ c &= 0x7f;
+ pci_write_config_byte(dev, 0x83, c);
+
+ pci_read_config_byte(dev, 0x84, &c);
+ c |= 0x01; /* emulated PATA mode enabled */
+ pci_write_config_byte(dev, 0x84, c);
+}
+
+/* PATA */
+static void __devinit quirk_uli5229(struct pci_dev *dev)
+{
+ unsigned short temp;
+ pci_write_config_word(dev, 0x04, 0x0405); /* MEM IO MSI */
+ pci_read_config_word(dev, 0x4a, &temp);
+ temp |= 0x1000; /* Enable Native IRQ 14/15 */
+ pci_write_config_word(dev, 0x4a, temp);
+}
+
+/*Bridge*/
+static void __devinit early_uli5249(struct pci_dev *dev)
+{
+ unsigned char temp;
+ pci_write_config_word(dev, 0x04, 0x0007); /* mem access */
+ pci_read_config_byte(dev, 0x7c, &temp);
+ pci_write_config_byte(dev, 0x7c, 0x80); /* R/W lock control */
+ pci_write_config_byte(dev, 0x09, 0x01); /* set as pci-pci bridge */
+ pci_write_config_byte(dev, 0x7c, temp); /* restore pci bus debug control */
+ dev->class |= 0x1;
+}
+
+DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AL, 0x1575, quirk_uli1575);
+DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AL, 0x5288, quirk_uli5288);
+DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AL, 0x5229, quirk_uli5229);
+DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_AL, 0x5249, early_uli5249);
+#endif /* CONFIG_PCI */
/*
* Setup the architecture
*/
static void __init mpc8544_ds_setup_arch(void)
{
+#ifdef CONFIG_PCI
+ struct device_node *np;
+#endif
+
if (ppc_md.progress)
ppc_md.progress("mpc8544_ds_setup_arch()", 0);
+#ifdef CONFIG_PCI
+ for (np = NULL; (np = of_find_node_by_type(np, "pci")) != NULL;) {
+ struct resource rsrc;
+ of_address_to_resource(np, 0, &rsrc);
+ if ((rsrc.start & 0xfffff) == 0xb000)
+ fsl_add_bridge(np, 1);
+ else
+ fsl_add_bridge(np, 0);
+ }
+#endif
+
printk("MPC8544 DS board from Freescale Semiconductor\n");
}
-
/*
* Called very early, device-tree isn't unflattened
*/
.probe = mpc8544_ds_probe,
.setup_arch = mpc8544_ds_setup_arch,
.init_IRQ = mpc8544_ds_pic_init,
+ .pcibios_fixup_bus = fsl_pcibios_fixup_bus,
.get_irq = mpic_get_irq,
.restart = mpc85xx_restart,
.calibrate_decr = generic_calibrate_decr,
*/
extern void mpc85xx_restart(char *);
-extern int mpc85xx_add_bridge(struct device_node *dev);
#include <asm/udbg.h>
#include <sysdev/fsl_soc.h>
+#include <sysdev/fsl_pci.h>
#include "mpc85xx.h"
#ifdef CONFIG_CPM2
#ifdef CONFIG_PCI
for (np = NULL; (np = of_find_node_by_type(np, "pci")) != NULL;)
- mpc85xx_add_bridge(np);
+ fsl_add_bridge(np, 1);
ppc_md.pci_exclude_device = mpc85xx_exclude_device;
#endif
}
#include <linux/seq_file.h>
#include <linux/initrd.h>
#include <linux/module.h>
+#include <linux/interrupt.h>
#include <linux/fsl_devices.h>
#include <asm/system.h>
#include <asm/i8259.h>
#include <sysdev/fsl_soc.h>
+#include <sysdev/fsl_pci.h>
#include "mpc85xx.h"
static int cds_pci_slot = 2;
static int mpc85xx_exclude_device(struct pci_controller *hose,
u_char bus, u_char devfn)
{
- if ((bus == hose->first_busno) && PCI_SLOT(devfn) == 0)
- return PCIBIOS_DEVICE_NOT_FOUND;
/* We explicitly do not go past the Tundra 320 Bridge */
if ((bus == 1) && (PCI_SLOT(devfn) == ARCADIA_2ND_BRIDGE_IDSEL))
return PCIBIOS_DEVICE_NOT_FOUND;
return PCIBIOS_SUCCESSFUL;
}
+static void mpc85xx_cds_restart(char *cmd)
+{
+ struct pci_dev *dev;
+ u_char tmp;
+
+ if ((dev = pci_get_device(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C686,
+ NULL))) {
+
+ /* Use the VIA Super Southbridge to force a PCI reset */
+ pci_read_config_byte(dev, 0x47, &tmp);
+ pci_write_config_byte(dev, 0x47, tmp | 1);
+
+ /* Flush the outbound PCI write queues */
+ pci_read_config_byte(dev, 0x47, &tmp);
+
+ /*
+ * At this point, the harware reset should have triggered.
+ * However, if it doesn't work for some mysterious reason,
+ * just fall through to the default reset below.
+ */
+
+ pci_dev_put(dev);
+ }
+
+ /*
+ * If we can't find the VIA chip (maybe the P2P bridge is disabled)
+ * or the VIA chip reset didn't work, just use the default reset.
+ */
+ mpc85xx_restart(NULL);
+}
+
static void __init mpc85xx_cds_pci_irq_fixup(struct pci_dev *dev)
{
u_char c;
/* There are two USB controllers.
* Identify them by functon number
*/
- if (PCI_FUNC(dev->devfn))
+ if (PCI_FUNC(dev->devfn) == 3)
dev->irq = 11;
else
dev->irq = 10;
}
}
+static void __devinit skip_fake_bridge(struct pci_dev *dev)
+{
+ /* Make it an error to skip the fake bridge
+ * in pci_setup_device() in probe.c */
+ dev->hdr_type = 0x7f;
+}
+DECLARE_PCI_FIXUP_EARLY(0x1957, 0x3fff, skip_fake_bridge);
+DECLARE_PCI_FIXUP_EARLY(0x3fff, 0x1957, skip_fake_bridge);
+DECLARE_PCI_FIXUP_EARLY(0xff3f, 0x5719, skip_fake_bridge);
+
#ifdef CONFIG_PPC_I8259
-#warning The i8259 PIC support is currently broken
-static void mpc85xx_8259_cascade(unsigned int irq, struct irq_desc *desc)
+static void mpc85xx_8259_cascade_handler(unsigned int irq,
+ struct irq_desc *desc)
{
unsigned int cascade_irq = i8259_irq();
if (cascade_irq != NO_IRQ)
+ /* handle an interrupt from the 8259 */
generic_handle_irq(cascade_irq);
- desc->chip->eoi(irq);
+ /* check for any interrupts from the shared IRQ line */
+ handle_fasteoi_irq(irq, desc);
+}
+
+static irqreturn_t mpc85xx_8259_cascade_action(int irq, void *dev_id)
+{
+ return IRQ_HANDLED;
}
+
+static struct irqaction mpc85xxcds_8259_irqaction = {
+ .handler = mpc85xx_8259_cascade_action,
+ .flags = IRQF_SHARED,
+ .mask = CPU_MASK_NONE,
+ .name = "8259 cascade",
+};
#endif /* PPC_I8259 */
#endif /* CONFIG_PCI */
struct mpic *mpic;
struct resource r;
struct device_node *np = NULL;
-#ifdef CONFIG_PPC_I8259
- struct device_node *cascade_node = NULL;
- int cascade_irq;
-#endif
np = of_find_node_by_type(np, "open-pic");
of_node_put(np);
mpic_init(mpic);
+}
+
+#if defined(CONFIG_PPC_I8259) && defined(CONFIG_PCI)
+static int mpc85xx_cds_8259_attach(void)
+{
+ int ret;
+ struct device_node *np = NULL;
+ struct device_node *cascade_node = NULL;
+ int cascade_irq;
+
+ if (!machine_is(mpc85xx_cds))
+ return 0;
-#ifdef CONFIG_PPC_I8259
/* Initialize the i8259 controller */
for_each_node_by_type(np, "interrupt-controller")
if (of_device_is_compatible(np, "chrp,iic")) {
if (cascade_node == NULL) {
printk(KERN_DEBUG "Could not find i8259 PIC\n");
- return;
+ return -ENODEV;
}
cascade_irq = irq_of_parse_and_map(cascade_node, 0);
if (cascade_irq == NO_IRQ) {
printk(KERN_ERR "Failed to map cascade interrupt\n");
- return;
+ return -ENXIO;
}
i8259_init(cascade_node, 0);
of_node_put(cascade_node);
- set_irq_chained_handler(cascade_irq, mpc85xx_8259_cascade);
-#endif /* CONFIG_PPC_I8259 */
+ /*
+ * Hook the interrupt to make sure desc->action is never NULL.
+ * This is required to ensure that the interrupt does not get
+ * disabled when the last user of the shared IRQ line frees their
+ * interrupt.
+ */
+ if ((ret = setup_irq(cascade_irq, &mpc85xxcds_8259_irqaction))) {
+ printk(KERN_ERR "Failed to setup cascade interrupt\n");
+ return ret;
+ }
+
+ /* Success. Connect our low-level cascade handler. */
+ set_irq_handler(cascade_irq, mpc85xx_8259_cascade_handler);
+
+ return 0;
}
+device_initcall(mpc85xx_cds_8259_attach);
+
+#endif /* CONFIG_PPC_I8259 */
+
/*
* Setup the architecture
*/
}
#ifdef CONFIG_PCI
- for (np = NULL; (np = of_find_node_by_type(np, "pci")) != NULL;)
- mpc85xx_add_bridge(np);
-
+ for (np = NULL; (np = of_find_node_by_type(np, "pci")) != NULL;) {
+ struct resource rsrc;
+ of_address_to_resource(np, 0, &rsrc);
+ if ((rsrc.start & 0xfffff) == 0x8000)
+ fsl_add_bridge(np, 1);
+ else
+ fsl_add_bridge(np, 0);
+ }
ppc_md.pci_irq_fixup = mpc85xx_cds_pci_irq_fixup;
ppc_md.pci_exclude_device = mpc85xx_exclude_device;
#endif
.init_IRQ = mpc85xx_cds_pic_init,
.show_cpuinfo = mpc85xx_cds_show_cpuinfo,
.get_irq = mpic_get_irq,
+#ifdef CONFIG_PCI
+ .restart = mpc85xx_cds_restart,
+#else
.restart = mpc85xx_restart,
+#endif
.calibrate_decr = generic_calibrate_decr,
.progress = udbg_progress,
+ .pcibios_fixup_bus = fsl_pcibios_fixup_bus,
};
#include <asm/prom.h>
#include <asm/udbg.h>
#include <sysdev/fsl_soc.h>
+#include <sysdev/fsl_pci.h>
#include <asm/qe.h>
#include <asm/qe_ic.h>
#include <asm/mpic.h>
}
#ifdef CONFIG_PCI
- for (np = NULL; (np = of_find_node_by_type(np, "pci")) != NULL;) {
- mpc85xx_add_bridge(np);
- }
+ for (np = NULL; (np = of_find_node_by_type(np, "pci")) != NULL;)
+ fsl_add_bridge(np, 1);
of_node_put(np);
#endif
.restart = mpc85xx_restart,
.calibrate_decr = generic_calibrate_decr,
.progress = udbg_progress,
+ .pcibios_fixup_bus = fsl_pcibios_fixup_bus,
};
+++ /dev/null
-/*
- * FSL SoC setup code
- *
- * Maintained by Kumar Gala (see MAINTAINERS for contact information)
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the
- * Free Software Foundation; either version 2 of the License, or (at your
- * option) any later version.
- */
-
-#include <linux/stddef.h>
-#include <linux/kernel.h>
-#include <linux/init.h>
-#include <linux/errno.h>
-#include <linux/pci.h>
-#include <linux/delay.h>
-#include <linux/irq.h>
-#include <linux/module.h>
-
-#include <asm/system.h>
-#include <asm/atomic.h>
-#include <asm/io.h>
-#include <asm/pci-bridge.h>
-#include <asm/prom.h>
-#include <sysdev/fsl_soc.h>
-
-#undef DEBUG
-
-#ifdef DEBUG
-#define DBG(x...) printk(x)
-#else
-#define DBG(x...)
-#endif
-
-#ifdef CONFIG_PCI
-int __init mpc85xx_add_bridge(struct device_node *dev)
-{
- int len;
- struct pci_controller *hose;
- struct resource rsrc;
- const int *bus_range;
- int primary = 1, has_address = 0;
- phys_addr_t immr = get_immrbase();
-
- DBG("Adding PCI host bridge %s\n", dev->full_name);
-
- /* Fetch host bridge registers address */
- has_address = (of_address_to_resource(dev, 0, &rsrc) == 0);
-
- /* Get bus range if any */
- bus_range = of_get_property(dev, "bus-range", &len);
- if (bus_range == NULL || len < 2 * sizeof(int)) {
- printk(KERN_WARNING "Can't get bus-range for %s, assume"
- " bus 0\n", dev->full_name);
- }
-
- pci_assign_all_buses = 1;
- hose = pcibios_alloc_controller(dev);
- if (!hose)
- return -ENOMEM;
-
- hose->first_busno = bus_range ? bus_range[0] : 0;
- hose->last_busno = bus_range ? bus_range[1] : 0xff;
-
- /* PCI 1 */
- if ((rsrc.start & 0xfffff) == 0x8000) {
- setup_indirect_pci(hose, immr + 0x8000, immr + 0x8004);
- }
- /* PCI 2 */
- if ((rsrc.start & 0xfffff) == 0x9000) {
- setup_indirect_pci(hose, immr + 0x9000, immr + 0x9004);
- primary = 0;
- }
-
- printk(KERN_INFO "Found MPC85xx PCI host bridge at 0x%016llx. "
- "Firmware bus number: %d->%d\n",
- (unsigned long long)rsrc.start, hose->first_busno,
- hose->last_busno);
-
- DBG(" ->Hose at 0x%p, cfg_addr=0x%p,cfg_data=0x%p\n",
- hose, hose->cfg_addr, hose->cfg_data);
-
- /* Interpret the "ranges" property */
- /* This also maps the I/O region and sets isa_io/mem_base */
- pci_process_bridge_OF_ranges(hose, dev, primary);
-
- return 0;
-}
-
-#endif
config MPC8641
bool
- select PPC_INDIRECT_PCI
- select PPC_INDIRECT_PCI_BE
+ select FSL_PCI if PCI
select PPC_UDBG_16550
select MPIC
default y if MPC8641_HPCN
obj-$(CONFIG_SMP) += mpc86xx_smp.o
obj-$(CONFIG_MPC8641_HPCN) += mpc86xx_hpcn.o
-obj-$(CONFIG_PCI) += pci.o
* mpc86xx_* files. Mostly for use by mpc86xx_setup().
*/
-extern int mpc86xx_add_bridge(struct device_node *dev);
-
-extern int mpc86xx_exclude_device(struct pci_controller *hose,
- u_char bus, u_char devfn);
-
extern void __init mpc86xx_smp_init(void);
#endif /* __MPC86XX_H__ */
#include <asm/mpic.h>
+#include <sysdev/fsl_pci.h>
#include <sysdev/fsl_soc.h>
#include "mpc86xx.h"
}
#ifdef CONFIG_PCI
- for (np = NULL; (np = of_find_node_by_type(np, "pci")) != NULL;)
- mpc86xx_add_bridge(np);
+ for (np = NULL; (np = of_find_node_by_type(np, "pci")) != NULL;) {
+ struct resource rsrc;
+ of_address_to_resource(np, 0, &rsrc);
+ if ((rsrc.start & 0xfffff) == 0x8000)
+ fsl_add_bridge(np, 1);
+ else
+ fsl_add_bridge(np, 0);
+ }
#endif
printk("MPC86xx HPCN board from Freescale Semiconductor\n");
return 0;
}
-
define_machine(mpc86xx_hpcn) {
.name = "MPC86xx HPCN",
.probe = mpc86xx_hpcn_probe,
.time_init = mpc86xx_time_init,
.calibrate_decr = generic_calibrate_decr,
.progress = udbg_progress,
+ .pcibios_fixup_bus = fsl_pcibios_fixup_bus,
};
+++ /dev/null
-/*
- * MPC86XX pci setup code
- *
- * Recode: ZHANG WEI <wei.zhang@freescale.com>
- * Initial author: Xianghua Xiao <x.xiao@freescale.com>
- *
- * Copyright 2006 Freescale Semiconductor Inc.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the
- * Free Software Foundation; either version 2 of the License, or (at your
- * option) any later version.
- */
-
-#include <linux/types.h>
-#include <linux/module.h>
-#include <linux/init.h>
-#include <linux/pci.h>
-#include <linux/serial.h>
-
-#include <asm/system.h>
-#include <asm/atomic.h>
-#include <asm/io.h>
-#include <asm/prom.h>
-#include <asm/pci-bridge.h>
-#include <sysdev/fsl_soc.h>
-#include <sysdev/fsl_pcie.h>
-
-#include "mpc86xx.h"
-
-#undef DEBUG
-
-#ifdef DEBUG
-#define DBG(fmt, args...) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args)
-#else
-#define DBG(fmt, args...)
-#endif
-
-struct pcie_outbound_window_regs {
- uint pexotar; /* 0x.0 - PCI Express outbound translation address register */
- uint pexotear; /* 0x.4 - PCI Express outbound translation extended address register */
- uint pexowbar; /* 0x.8 - PCI Express outbound window base address register */
- char res1[4];
- uint pexowar; /* 0x.10 - PCI Express outbound window attributes register */
- char res2[12];
-};
-
-struct pcie_inbound_window_regs {
- uint pexitar; /* 0x.0 - PCI Express inbound translation address register */
- char res1[4];
- uint pexiwbar; /* 0x.8 - PCI Express inbound window base address register */
- uint pexiwbear; /* 0x.c - PCI Express inbound window base extended address register */
- uint pexiwar; /* 0x.10 - PCI Express inbound window attributes register */
- char res2[12];
-};
-
-static void __init setup_pcie_atmu(struct pci_controller *hose, struct resource *rsrc)
-{
- volatile struct ccsr_pex *pcie;
- volatile struct pcie_outbound_window_regs *pcieow;
- volatile struct pcie_inbound_window_regs *pcieiw;
- int i = 0;
-
- DBG("PCIE memory map start 0x%x, size 0x%x\n", rsrc->start,
- rsrc->end - rsrc->start + 1);
- pcie = ioremap(rsrc->start, rsrc->end - rsrc->start + 1);
-
- /* Disable all windows (except pexowar0 since its ignored) */
- pcie->pexowar1 = 0;
- pcie->pexowar2 = 0;
- pcie->pexowar3 = 0;
- pcie->pexowar4 = 0;
- pcie->pexiwar1 = 0;
- pcie->pexiwar2 = 0;
- pcie->pexiwar3 = 0;
-
- pcieow = (struct pcie_outbound_window_regs *)&pcie->pexotar1;
- pcieiw = (struct pcie_inbound_window_regs *)&pcie->pexitar1;
-
- /* Setup outbound MEM window */
- for(i = 0; i < 3; i++)
- if (hose->mem_resources[i].flags & IORESOURCE_MEM){
- DBG("PCIE MEM resource start 0x%08x, size 0x%08x.\n",
- hose->mem_resources[i].start,
- hose->mem_resources[i].end
- - hose->mem_resources[i].start + 1);
- pcieow->pexotar = (hose->mem_resources[i].start) >> 12
- & 0x000fffff;
- pcieow->pexotear = 0;
- pcieow->pexowbar = (hose->mem_resources[i].start) >> 12
- & 0x000fffff;
- /* Enable, Mem R/W */
- pcieow->pexowar = 0x80044000 |
- (__ilog2(hose->mem_resources[i].end
- - hose->mem_resources[i].start + 1)
- - 1);
- pcieow++;
- }
-
- /* Setup outbound IO window */
- if (hose->io_resource.flags & IORESOURCE_IO){
- DBG("PCIE IO resource start 0x%08x, size 0x%08x, phy base 0x%08x.\n",
- hose->io_resource.start,
- hose->io_resource.end - hose->io_resource.start + 1,
- hose->io_base_phys);
- pcieow->pexotar = (hose->io_resource.start) >> 12 & 0x000fffff;
- pcieow->pexotear = 0;
- pcieow->pexowbar = (hose->io_base_phys) >> 12 & 0x000fffff;
- /* Enable, IO R/W */
- pcieow->pexowar = 0x80088000 | (__ilog2(hose->io_resource.end
- - hose->io_resource.start + 1) - 1);
- }
-
- /* Setup 2G inbound Memory Window @ 0 */
- pcieiw->pexitar = 0x00000000;
- pcieiw->pexiwbar = 0x00000000;
- /* Enable, Prefetch, Local Mem, Snoop R/W, 2G */
- pcieiw->pexiwar = 0xa0f5501e;
-}
-
-static void __init
-mpc86xx_setup_pcie(struct pci_controller *hose, u32 pcie_offset, u32 pcie_size)
-{
- u16 cmd;
-
- DBG("PCIE host controller register offset 0x%08x, size 0x%08x.\n",
- pcie_offset, pcie_size);
-
- early_read_config_word(hose, 0, 0, PCI_COMMAND, &cmd);
- cmd |= PCI_COMMAND_SERR | PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY
- | PCI_COMMAND_IO;
- early_write_config_word(hose, 0, 0, PCI_COMMAND, cmd);
-
- early_write_config_byte(hose, 0, 0, PCI_LATENCY_TIMER, 0x80);
-}
-
-static void __devinit quirk_fsl_pcie_transparent(struct pci_dev *dev)
-{
- struct resource *res;
- int i, res_idx = PCI_BRIDGE_RESOURCES;
- struct pci_controller *hose;
-
- /*
- * Make the bridge be transparent.
- */
- dev->transparent = 1;
-
- hose = pci_bus_to_host(dev->bus);
- if (!hose) {
- printk(KERN_ERR "Can't find hose for bus %d\n",
- dev->bus->number);
- return;
- }
-
- if (hose->io_resource.flags) {
- res = &dev->resource[res_idx++];
- res->start = hose->io_resource.start;
- res->end = hose->io_resource.end;
- res->flags = hose->io_resource.flags;
- }
-
- for (i = 0; i < 3; i++) {
- res = &dev->resource[res_idx + i];
- res->start = hose->mem_resources[i].start;
- res->end = hose->mem_resources[i].end;
- res->flags = hose->mem_resources[i].flags;
- }
-}
-
-
-DECLARE_PCI_FIXUP_EARLY(0x1957, 0x7010, quirk_fsl_pcie_transparent);
-DECLARE_PCI_FIXUP_EARLY(0x1957, 0x7011, quirk_fsl_pcie_transparent);
-
-#define PCIE_LTSSM 0x404 /* PCIe Link Training and Status */
-#define PCIE_LTSSM_L0 0x16 /* L0 state */
-
-int __init mpc86xx_add_bridge(struct device_node *dev)
-{
- int len;
- struct pci_controller *hose;
- struct resource rsrc;
- const int *bus_range;
- int has_address = 0;
- int primary = 0;
- u16 val;
-
- DBG("Adding PCIE host bridge %s\n", dev->full_name);
-
- /* Fetch host bridge registers address */
- has_address = (of_address_to_resource(dev, 0, &rsrc) == 0);
-
- /* Get bus range if any */
- bus_range = of_get_property(dev, "bus-range", &len);
- if (bus_range == NULL || len < 2 * sizeof(int))
- printk(KERN_WARNING "Can't get bus-range for %s, assume"
- " bus 0\n", dev->full_name);
-
- pci_assign_all_buses = 1;
- hose = pcibios_alloc_controller(dev);
- if (!hose)
- return -ENOMEM;
-
- hose->indirect_type = PPC_INDIRECT_TYPE_EXT_REG |
- PPC_INDIRECT_TYPE_SURPRESS_PRIMARY_BUS;
-
- hose->first_busno = bus_range ? bus_range[0] : 0x0;
- hose->last_busno = bus_range ? bus_range[1] : 0xff;
-
- setup_indirect_pci(hose, rsrc.start, rsrc.start + 0x4);
-
- /* Probe the hose link training status */
- early_read_config_word(hose, 0, 0, PCIE_LTSSM, &val);
- if (val < PCIE_LTSSM_L0)
- return -ENXIO;
-
- /* Setup the PCIE host controller. */
- mpc86xx_setup_pcie(hose, rsrc.start, rsrc.end - rsrc.start + 1);
-
- if ((rsrc.start & 0xfffff) == 0x8000)
- primary = 1;
-
- printk(KERN_INFO "Found MPC86xx PCIE host bridge at 0x%08lx. "
- "Firmware bus number: %d->%d\n",
- (unsigned long) rsrc.start,
- hose->first_busno, hose->last_busno);
-
- DBG(" ->Hose at 0x%p, cfg_addr=0x%p,cfg_data=0x%p\n",
- hose, hose->cfg_addr, hose->cfg_data);
-
- /* Interpret the "ranges" property */
- /* This also maps the I/O region and sets isa_io/mem_base */
- pci_process_bridge_OF_ranges(hose, dev, primary);
-
- /* Setup PEX window registers */
- setup_pcie_atmu(hose, &rsrc);
-
- return 0;
-}
INIT_LIST_HEAD(&ctx->aff_list);
if (gang)
spu_gang_add_ctx(gang, ctx);
- ctx->cpus_allowed = current->cpus_allowed;
+
+ __spu_update_sched_info(ctx);
spu_set_timeslice(ctx);
ctx->stats.util_state = SPU_UTIL_IDLE_LOADED;
spu_acquire(ctx);
if (ctx->state == SPU_STATE_SAVED) {
__spu_update_sched_info(ctx);
+ spu_set_timeslice(ctx);
ret = spu_activate(ctx, 0);
if (ret) {
/*
* We have to update the scheduling priority under active_mutex
* to protect against find_victim().
+ *
+ * No need to update the timeslice ASAP, it will get updated
+ * once the current one has expired.
*/
spu_update_sched_info(ctx);
}
INIT_LIST_HEAD(&spu_prio->runq[i]);
__clear_bit(i, spu_prio->bitmap);
}
- for (i = 0; i < MAX_NUMNODES; i++) {
- mutex_init(&cbe_spu_info[i].list_mutex);
- INIT_LIST_HEAD(&cbe_spu_info[i].spus);
- }
spin_lock_init(&spu_prio->runq_lock);
setup_timer(&spusched_timer, spusched_wake, 0);
struct spu_context_ops;
struct spu_gang;
-enum {
- SPU_SCHED_WAS_ACTIVE, /* was active upon spu_acquire_saved() */
-};
-
/* ctx->sched_flags */
enum {
SPU_SCHED_NOTIFY_ACTIVE,
+ SPU_SCHED_WAS_ACTIVE, /* was active upon spu_acquire_saved() */
};
struct spu_context {
}
iounmap(reg);
- setup_indirect_pci(hose, r.start + 0xf8000, r.start + 0xf8010);
+ setup_indirect_pci(hose, r.start + 0xf8000, r.start + 0xf8010, 0);
}
/* Marvell Discovery II based Pegasos 2 */
hose->cfg_data = p;
gg2_pci_config_base = p;
} else if (is_pegasos == 1) {
- setup_indirect_pci(hose, 0xfec00cf8, 0xfee00cfc);
+ setup_indirect_pci(hose, 0xfec00cf8, 0xfee00cfc, 0);
} else if (is_pegasos == 2) {
setup_peg2(hose, dev);
} else if (!strncmp(model, "IBM,CPC710", 10)) {
setup_indirect_pci(hose,
r.start + 0x000f8000,
- r.start + 0x000f8010);
+ r.start + 0x000f8010,
+ 0);
if (index == 0) {
dma = of_get_property(dev, "system-dma-base",
&len);
return -ENOMEM;
hose->first_busno = bus_range ? bus_range[0] : 0;
hose->last_busno = bus_range ? bus_range[1] : 0xff;
- setup_indirect_pci(hose, 0xfec00000, 0xfee00000);
+ setup_indirect_pci(hose, 0xfec00000, 0xfee00000, 0);
/* Interpret the "ranges" property */
/* This also maps the I/O region and sets isa_io/mem_base */
}
__setup("spread_lpevents=", set_spread_lpevents);
-void setup_hvlpevent_queue(void)
+void __init setup_hvlpevent_queue(void)
{
void *eventStack;
/* Fixup "bus-range" OF property */
fixup_bus_range(dev);
+ /* Check for legacy IOs */
+ isa_bridge_find_early(hose);
+
return 0;
}
obj-$(CONFIG_U3_DART) += dart_iommu.o
obj-$(CONFIG_MMIO_NVRAM) += mmio_nvram.o
obj-$(CONFIG_FSL_SOC) += fsl_soc.o
+obj-$(CONFIG_FSL_PCI) += fsl_pci.o
obj-$(CONFIG_TSI108_BRIDGE) += tsi108_pci.o tsi108_dev.o
obj-$(CONFIG_QUICC_ENGINE) += qe_lib/
mv64x60-$(CONFIG_PCI) += mv64x60_pci.o
--- /dev/null
+/*
+ * MPC85xx/86xx PCI/PCIE support routing.
+ *
+ * Copyright 2007 Freescale Semiconductor, Inc
+ *
+ * Initial author: Xianghua Xiao <x.xiao@freescale.com>
+ * Recode: ZHANG WEI <wei.zhang@freescale.com>
+ * Rewrite the routing for Frescale PCI and PCI Express
+ * Roy Zang <tie-fei.zang@freescale.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ */
+#include <linux/kernel.h>
+#include <linux/pci.h>
+#include <linux/delay.h>
+#include <linux/string.h>
+#include <linux/init.h>
+#include <linux/bootmem.h>
+
+#include <asm/io.h>
+#include <asm/prom.h>
+#include <asm/pci-bridge.h>
+#include <asm/machdep.h>
+#include <sysdev/fsl_soc.h>
+#include <sysdev/fsl_pci.h>
+
+/* atmu setup for fsl pci/pcie controller */
+void __init setup_pci_atmu(struct pci_controller *hose, struct resource *rsrc)
+{
+ struct ccsr_pci __iomem *pci;
+ int i;
+
+ pr_debug("PCI memory map start 0x%x, size 0x%x\n", rsrc->start,
+ rsrc->end - rsrc->start + 1);
+ pci = ioremap(rsrc->start, rsrc->end - rsrc->start + 1);
+
+ /* Disable all windows (except powar0 since its ignored) */
+ for(i = 1; i < 5; i++)
+ out_be32(&pci->pow[i].powar, 0);
+ for(i = 0; i < 3; i++)
+ out_be32(&pci->piw[i].piwar, 0);
+
+ /* Setup outbound MEM window */
+ for(i = 0; i < 3; i++)
+ if (hose->mem_resources[i].flags & IORESOURCE_MEM){
+ pr_debug("PCI MEM resource start 0x%08x, size 0x%08x.\n",
+ hose->mem_resources[i].start,
+ hose->mem_resources[i].end
+ - hose->mem_resources[i].start + 1);
+ out_be32(&pci->pow[i+1].potar,
+ (hose->mem_resources[i].start >> 12)
+ & 0x000fffff);
+ out_be32(&pci->pow[i+1].potear, 0);
+ out_be32(&pci->pow[i+1].powbar,
+ (hose->mem_resources[i].start >> 12)
+ & 0x000fffff);
+ /* Enable, Mem R/W */
+ out_be32(&pci->pow[i+1].powar, 0x80044000
+ | (__ilog2(hose->mem_resources[i].end
+ - hose->mem_resources[i].start + 1) - 1));
+ }
+
+ /* Setup outbound IO window */
+ if (hose->io_resource.flags & IORESOURCE_IO){
+ pr_debug("PCI IO resource start 0x%08x, size 0x%08x, phy base 0x%08x.\n",
+ hose->io_resource.start,
+ hose->io_resource.end - hose->io_resource.start + 1,
+ hose->io_base_phys);
+ out_be32(&pci->pow[i+1].potar, (hose->io_resource.start >> 12)
+ & 0x000fffff);
+ out_be32(&pci->pow[i+1].potear, 0);
+ out_be32(&pci->pow[i+1].powbar, (hose->io_base_phys >> 12)
+ & 0x000fffff);
+ /* Enable, IO R/W */
+ out_be32(&pci->pow[i+1].powar, 0x80088000
+ | (__ilog2(hose->io_resource.end
+ - hose->io_resource.start + 1) - 1));
+ }
+
+ /* Setup 2G inbound Memory Window @ 1 */
+ out_be32(&pci->piw[2].pitar, 0x00000000);
+ out_be32(&pci->piw[2].piwbar,0x00000000);
+ out_be32(&pci->piw[2].piwar, PIWAR_2G);
+}
+
+void __init setup_pci_cmd(struct pci_controller *hose)
+{
+ u16 cmd;
+ int cap_x;
+
+ early_read_config_word(hose, 0, 0, PCI_COMMAND, &cmd);
+ cmd |= PCI_COMMAND_SERR | PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY
+ | PCI_COMMAND_IO;
+ early_write_config_word(hose, 0, 0, PCI_COMMAND, cmd);
+
+ cap_x = early_find_capability(hose, 0, 0, PCI_CAP_ID_PCIX);
+ if (cap_x) {
+ int pci_x_cmd = cap_x + PCI_X_CMD;
+ cmd = PCI_X_CMD_MAX_SPLIT | PCI_X_CMD_MAX_READ
+ | PCI_X_CMD_ERO | PCI_X_CMD_DPERR_E;
+ early_write_config_word(hose, 0, 0, pci_x_cmd, cmd);
+ } else {
+ early_write_config_byte(hose, 0, 0, PCI_LATENCY_TIMER, 0x80);
+ }
+}
+
+static void __init quirk_fsl_pcie_transparent(struct pci_dev *dev)
+{
+ struct resource *res;
+ int i, res_idx = PCI_BRIDGE_RESOURCES;
+ struct pci_controller *hose;
+
+ /* if we aren't a PCIe don't bother */
+ if (!pci_find_capability(dev, PCI_CAP_ID_EXP))
+ return ;
+
+ /*
+ * Make the bridge be transparent.
+ */
+ dev->transparent = 1;
+
+ hose = pci_bus_to_host(dev->bus);
+ if (!hose) {
+ printk(KERN_ERR "Can't find hose for bus %d\n",
+ dev->bus->number);
+ return;
+ }
+
+ /* Clear out any of the virtual P2P bridge registers */
+ pci_write_config_word(dev, PCI_IO_BASE_UPPER16, 0);
+ pci_write_config_word(dev, PCI_IO_LIMIT_UPPER16, 0);
+ pci_write_config_byte(dev, PCI_IO_BASE, 0x10);
+ pci_write_config_byte(dev, PCI_IO_LIMIT, 0);
+ pci_write_config_word(dev, PCI_MEMORY_BASE, 0x10);
+ pci_write_config_word(dev, PCI_MEMORY_LIMIT, 0);
+ pci_write_config_word(dev, PCI_PREF_BASE_UPPER32, 0x0);
+ pci_write_config_word(dev, PCI_PREF_LIMIT_UPPER32, 0x0);
+ pci_write_config_word(dev, PCI_PREF_MEMORY_BASE, 0x10);
+ pci_write_config_word(dev, PCI_PREF_MEMORY_LIMIT, 0);
+
+ if (hose->io_resource.flags) {
+ res = &dev->resource[res_idx++];
+ res->start = hose->io_resource.start;
+ res->end = hose->io_resource.end;
+ res->flags = hose->io_resource.flags;
+ update_bridge_resource(dev, res);
+ }
+
+ for (i = 0; i < 3; i++) {
+ res = &dev->resource[res_idx + i];
+ res->start = hose->mem_resources[i].start;
+ res->end = hose->mem_resources[i].end;
+ res->flags = hose->mem_resources[i].flags;
+ update_bridge_resource(dev, res);
+ }
+}
+
+int __init fsl_pcie_check_link(struct pci_controller *hose)
+{
+ u16 val;
+ early_read_config_word(hose, 0, 0, PCIE_LTSSM, &val);
+ if (val < PCIE_LTSSM_L0)
+ return 1;
+ return 0;
+}
+
+void fsl_pcibios_fixup_bus(struct pci_bus *bus)
+{
+ struct pci_controller *hose = (struct pci_controller *) bus->sysdata;
+ int i;
+
+ /* deal with bogus pci_bus when we don't have anything connected on PCIe */
+ if (hose->indirect_type & PPC_INDIRECT_TYPE_NO_PCIE_LINK) {
+ if (bus->parent) {
+ for (i = 0; i < 4; ++i)
+ bus->resource[i] = bus->parent->resource[i];
+ }
+ }
+}
+
+int __init fsl_add_bridge(struct device_node *dev, int is_primary)
+{
+ int len;
+ struct pci_controller *hose;
+ struct resource rsrc;
+ const int *bus_range;
+
+ pr_debug("Adding PCI host bridge %s\n", dev->full_name);
+
+ /* Fetch host bridge registers address */
+ if (of_address_to_resource(dev, 0, &rsrc)) {
+ printk(KERN_WARNING "Can't get pci register base!");
+ return -ENOMEM;
+ }
+
+ /* Get bus range if any */
+ bus_range = of_get_property(dev, "bus-range", &len);
+ if (bus_range == NULL || len < 2 * sizeof(int))
+ printk(KERN_WARNING "Can't get bus-range for %s, assume"
+ " bus 0\n", dev->full_name);
+
+ pci_assign_all_buses = 1;
+ hose = pcibios_alloc_controller(dev);
+ if (!hose)
+ return -ENOMEM;
+
+ hose->first_busno = bus_range ? bus_range[0] : 0x0;
+ hose->last_busno = bus_range ? bus_range[1] : 0xff;
+
+ setup_indirect_pci(hose, rsrc.start, rsrc.start + 0x4,
+ PPC_INDIRECT_TYPE_BIG_ENDIAN);
+ setup_pci_cmd(hose);
+
+ /* check PCI express link status */
+ if (early_find_capability(hose, 0, 0, PCI_CAP_ID_EXP)) {
+ hose->indirect_type |= PPC_INDIRECT_TYPE_EXT_REG |
+ PPC_INDIRECT_TYPE_SURPRESS_PRIMARY_BUS;
+ if (fsl_pcie_check_link(hose))
+ hose->indirect_type |= PPC_INDIRECT_TYPE_NO_PCIE_LINK;
+ }
+
+ printk(KERN_INFO "Found FSL PCI host bridge at 0x%016llx."
+ "Firmware bus number: %d->%d\n",
+ (unsigned long long)rsrc.start, hose->first_busno,
+ hose->last_busno);
+
+ pr_debug(" ->Hose at 0x%p, cfg_addr=0x%p,cfg_data=0x%p\n",
+ hose, hose->cfg_addr, hose->cfg_data);
+
+ /* Interpret the "ranges" property */
+ /* This also maps the I/O region and sets isa_io/mem_base */
+ pci_process_bridge_OF_ranges(hose, dev, is_primary);
+
+ /* Setup PEX window registers */
+ setup_pci_atmu(hose, &rsrc);
+
+ return 0;
+}
+
+DECLARE_PCI_FIXUP_EARLY(0x1957, PCI_DEVICE_ID_MPC8548E, quirk_fsl_pcie_transparent);
+DECLARE_PCI_FIXUP_EARLY(0x1957, PCI_DEVICE_ID_MPC8548, quirk_fsl_pcie_transparent);
+DECLARE_PCI_FIXUP_EARLY(0x1957, PCI_DEVICE_ID_MPC8543E, quirk_fsl_pcie_transparent);
+DECLARE_PCI_FIXUP_EARLY(0x1957, PCI_DEVICE_ID_MPC8543, quirk_fsl_pcie_transparent);
+DECLARE_PCI_FIXUP_EARLY(0x1957, PCI_DEVICE_ID_MPC8547E, quirk_fsl_pcie_transparent);
+DECLARE_PCI_FIXUP_EARLY(0x1957, PCI_DEVICE_ID_MPC8545E, quirk_fsl_pcie_transparent);
+DECLARE_PCI_FIXUP_EARLY(0x1957, PCI_DEVICE_ID_MPC8545, quirk_fsl_pcie_transparent);
+DECLARE_PCI_FIXUP_EARLY(0x1957, PCI_DEVICE_ID_MPC8568E, quirk_fsl_pcie_transparent);
+DECLARE_PCI_FIXUP_EARLY(0x1957, PCI_DEVICE_ID_MPC8568, quirk_fsl_pcie_transparent);
+DECLARE_PCI_FIXUP_EARLY(0x1957, PCI_DEVICE_ID_MPC8567E, quirk_fsl_pcie_transparent);
+DECLARE_PCI_FIXUP_EARLY(0x1957, PCI_DEVICE_ID_MPC8567, quirk_fsl_pcie_transparent);
+DECLARE_PCI_FIXUP_EARLY(0x1957, PCI_DEVICE_ID_MPC8544E, quirk_fsl_pcie_transparent);
+DECLARE_PCI_FIXUP_EARLY(0x1957, PCI_DEVICE_ID_MPC8544, quirk_fsl_pcie_transparent);
+DECLARE_PCI_FIXUP_EARLY(0x1957, PCI_DEVICE_ID_MPC8641, quirk_fsl_pcie_transparent);
+DECLARE_PCI_FIXUP_EARLY(0x1957, PCI_DEVICE_ID_MPC8641D, quirk_fsl_pcie_transparent);
--- /dev/null
+/*
+ * MPC85xx/86xx PCI Express structure define
+ *
+ * Copyright 2007 Freescale Semiconductor, Inc
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ */
+
+#ifdef __KERNEL__
+#ifndef __POWERPC_FSL_PCI_H
+#define __POWERPC_FSL_PCI_H
+
+#define PCIE_LTSSM 0x0404 /* PCIE Link Training and Status */
+#define PCIE_LTSSM_L0 0x16 /* L0 state */
+#define PIWAR_2G 0xa0f5501e /* Enable, Prefetch, Local Mem, Snoop R/W, 2G */
+
+/* PCI/PCI Express outbound window reg */
+struct pci_outbound_window_regs {
+ __be32 potar; /* 0x.0 - Outbound translation address register */
+ __be32 potear; /* 0x.4 - Outbound translation extended address register */
+ __be32 powbar; /* 0x.8 - Outbound window base address register */
+ u8 res1[4];
+ __be32 powar; /* 0x.10 - Outbound window attributes register */
+ u8 res2[12];
+};
+
+/* PCI/PCI Express inbound window reg */
+struct pci_inbound_window_regs {
+ __be32 pitar; /* 0x.0 - Inbound translation address register */
+ u8 res1[4];
+ __be32 piwbar; /* 0x.8 - Inbound window base address register */
+ __be32 piwbear; /* 0x.c - Inbound window base extended address register */
+ __be32 piwar; /* 0x.10 - Inbound window attributes register */
+ u8 res2[12];
+};
+
+/* PCI/PCI Express IO block registers for 85xx/86xx */
+struct ccsr_pci {
+ __be32 config_addr; /* 0x.000 - PCI/PCIE Configuration Address Register */
+ __be32 config_data; /* 0x.004 - PCI/PCIE Configuration Data Register */
+ __be32 int_ack; /* 0x.008 - PCI Interrupt Acknowledge Register */
+ __be32 pex_otb_cpl_tor; /* 0x.00c - PCIE Outbound completion timeout register */
+ __be32 pex_conf_tor; /* 0x.010 - PCIE configuration timeout register */
+ u8 res2[12];
+ __be32 pex_pme_mes_dr; /* 0x.020 - PCIE PME and message detect register */
+ __be32 pex_pme_mes_disr; /* 0x.024 - PCIE PME and message disable register */
+ __be32 pex_pme_mes_ier; /* 0x.028 - PCIE PME and message interrupt enable register */
+ __be32 pex_pmcr; /* 0x.02c - PCIE power management command register */
+ u8 res3[3024];
+
+/* PCI/PCI Express outbound window 0-4
+ * Window 0 is the default window and is the only window enabled upon reset.
+ * The default outbound register set is used when a transaction misses
+ * in all of the other outbound windows.
+ */
+ struct pci_outbound_window_regs pow[5];
+
+ u8 res14[256];
+
+/* PCI/PCI Express inbound window 3-1
+ * inbound window 1 supports only a 32-bit base address and does not
+ * define an inbound window base extended address register.
+ */
+ struct pci_inbound_window_regs piw[3];
+
+ __be32 pex_err_dr; /* 0x.e00 - PCI/PCIE error detect register */
+ u8 res21[4];
+ __be32 pex_err_en; /* 0x.e08 - PCI/PCIE error interrupt enable register */
+ u8 res22[4];
+ __be32 pex_err_disr; /* 0x.e10 - PCI/PCIE error disable register */
+ u8 res23[12];
+ __be32 pex_err_cap_stat; /* 0x.e20 - PCI/PCIE error capture status register */
+ u8 res24[4];
+ __be32 pex_err_cap_r0; /* 0x.e28 - PCIE error capture register 0 */
+ __be32 pex_err_cap_r1; /* 0x.e2c - PCIE error capture register 0 */
+ __be32 pex_err_cap_r2; /* 0x.e30 - PCIE error capture register 0 */
+ __be32 pex_err_cap_r3; /* 0x.e34 - PCIE error capture register 0 */
+};
+
+extern int fsl_add_bridge(struct device_node *dev, int is_primary);
+extern void fsl_pcibios_fixup_bus(struct pci_bus *bus);
+
+#endif /* __POWERPC_FSL_PCI_H */
+#endif /* __KERNEL__ */
+++ /dev/null
-/*
- * MPC85xx/86xx PCI Express structure define
- *
- * Copyright 2007 Freescale Semiconductor, Inc
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the
- * Free Software Foundation; either version 2 of the License, or (at your
- * option) any later version.
- *
- */
-
-#ifdef __KERNEL__
-#ifndef __POWERPC_FSL_PCIE_H
-#define __POWERPC_FSL_PCIE_H
-
-/* PCIE Express IO block registers in 85xx/86xx */
-
-struct ccsr_pex {
- __be32 __iomem pex_config_addr; /* 0x.000 - PCI Express Configuration Address Register */
- __be32 __iomem pex_config_data; /* 0x.004 - PCI Express Configuration Data Register */
- u8 __iomem res1[4];
- __be32 __iomem pex_otb_cpl_tor; /* 0x.00c - PCI Express Outbound completion timeout register */
- __be32 __iomem pex_conf_tor; /* 0x.010 - PCI Express configuration timeout register */
- u8 __iomem res2[12];
- __be32 __iomem pex_pme_mes_dr; /* 0x.020 - PCI Express PME and message detect register */
- __be32 __iomem pex_pme_mes_disr; /* 0x.024 - PCI Express PME and message disable register */
- __be32 __iomem pex_pme_mes_ier; /* 0x.028 - PCI Express PME and message interrupt enable register */
- __be32 __iomem pex_pmcr; /* 0x.02c - PCI Express power management command register */
- u8 __iomem res3[3024];
- __be32 __iomem pexotar0; /* 0x.c00 - PCI Express outbound translation address register 0 */
- __be32 __iomem pexotear0; /* 0x.c04 - PCI Express outbound translation extended address register 0*/
- u8 __iomem res4[8];
- __be32 __iomem pexowar0; /* 0x.c10 - PCI Express outbound window attributes register 0*/
- u8 __iomem res5[12];
- __be32 __iomem pexotar1; /* 0x.c20 - PCI Express outbound translation address register 1 */
- __be32 __iomem pexotear1; /* 0x.c24 - PCI Express outbound translation extended address register 1*/
- __be32 __iomem pexowbar1; /* 0x.c28 - PCI Express outbound window base address register 1*/
- u8 __iomem res6[4];
- __be32 __iomem pexowar1; /* 0x.c30 - PCI Express outbound window attributes register 1*/
- u8 __iomem res7[12];
- __be32 __iomem pexotar2; /* 0x.c40 - PCI Express outbound translation address register 2 */
- __be32 __iomem pexotear2; /* 0x.c44 - PCI Express outbound translation extended address register 2*/
- __be32 __iomem pexowbar2; /* 0x.c48 - PCI Express outbound window base address register 2*/
- u8 __iomem res8[4];
- __be32 __iomem pexowar2; /* 0x.c50 - PCI Express outbound window attributes register 2*/
- u8 __iomem res9[12];
- __be32 __iomem pexotar3; /* 0x.c60 - PCI Express outbound translation address register 3 */
- __be32 __iomem pexotear3; /* 0x.c64 - PCI Express outbound translation extended address register 3*/
- __be32 __iomem pexowbar3; /* 0x.c68 - PCI Express outbound window base address register 3*/
- u8 __iomem res10[4];
- __be32 __iomem pexowar3; /* 0x.c70 - PCI Express outbound window attributes register 3*/
- u8 __iomem res11[12];
- __be32 __iomem pexotar4; /* 0x.c80 - PCI Express outbound translation address register 4 */
- __be32 __iomem pexotear4; /* 0x.c84 - PCI Express outbound translation extended address register 4*/
- __be32 __iomem pexowbar4; /* 0x.c88 - PCI Express outbound window base address register 4*/
- u8 __iomem res12[4];
- __be32 __iomem pexowar4; /* 0x.c90 - PCI Express outbound window attributes register 4*/
- u8 __iomem res13[12];
- u8 __iomem res14[256];
- __be32 __iomem pexitar3; /* 0x.da0 - PCI Express inbound translation address register 3 */
- u8 __iomem res15[4];
- __be32 __iomem pexiwbar3; /* 0x.da8 - PCI Express inbound window base address register 3 */
- __be32 __iomem pexiwbear3; /* 0x.dac - PCI Express inbound window base extended address register 3 */
- __be32 __iomem pexiwar3; /* 0x.db0 - PCI Express inbound window attributes register 3 */
- u8 __iomem res16[12];
- __be32 __iomem pexitar2; /* 0x.dc0 - PCI Express inbound translation address register 2 */
- u8 __iomem res17[4];
- __be32 __iomem pexiwbar2; /* 0x.dc8 - PCI Express inbound window base address register 2 */
- __be32 __iomem pexiwbear2; /* 0x.dcc - PCI Express inbound window base extended address register 2 */
- __be32 __iomem pexiwar2; /* 0x.dd0 - PCI Express inbound window attributes register 2 */
- u8 __iomem res18[12];
- __be32 __iomem pexitar1; /* 0x.de0 - PCI Express inbound translation address register 2 */
- u8 __iomem res19[4];
- __be32 __iomem pexiwbar1; /* 0x.de8 - PCI Express inbound window base address register 2 */
- __be32 __iomem pexiwbear1; /* 0x.dec - PCI Express inbound window base extended address register 2 */
- __be32 __iomem pexiwar1; /* 0x.df0 - PCI Express inbound window attributes register 2 */
- u8 __iomem res20[12];
- __be32 __iomem pex_err_dr; /* 0x.e00 - PCI Express error detect register */
- u8 __iomem res21[4];
- __be32 __iomem pex_err_en; /* 0x.e08 - PCI Express error interrupt enable register */
- u8 __iomem res22[4];
- __be32 __iomem pex_err_disr; /* 0x.e10 - PCI Express error disable register */
- u8 __iomem res23[12];
- __be32 __iomem pex_err_cap_stat; /* 0x.e20 - PCI Express error capture status register */
- u8 __iomem res24[4];
- __be32 __iomem pex_err_cap_r0; /* 0x.e28 - PCI Express error capture register 0 */
- __be32 __iomem pex_err_cap_r1; /* 0x.e2c - PCI Express error capture register 0 */
- __be32 __iomem pex_err_cap_r2; /* 0x.e30 - PCI Express error capture register 0 */
- __be32 __iomem pex_err_cap_r3; /* 0x.e34 - PCI Express error capture register 0 */
-};
-
-#endif /* __POWERPC_FSL_PCIE_H */
-#endif /* __KERNEL__ */
arch_initcall(gfar_of_init);
+#ifdef CONFIG_I2C_BOARDINFO
+#include <linux/i2c.h>
+struct i2c_driver_device {
+ char *of_device;
+ char *i2c_driver;
+ char *i2c_type;
+};
+
+static struct i2c_driver_device i2c_devices[] __initdata = {
+ {"ricoh,rs5c372a", "rtc-rs5c372", "rs5c372a",},
+ {"ricoh,rs5c372b", "rtc-rs5c372", "rs5c372b",},
+ {"ricoh,rv5c386", "rtc-rs5c372", "rv5c386",},
+ {"ricoh,rv5c387a", "rtc-rs5c372", "rv5c387a",},
+};
+
+static int __init of_find_i2c_driver(struct device_node *node, struct i2c_board_info *info)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(i2c_devices); i++) {
+ if (!of_device_is_compatible(node, i2c_devices[i].of_device))
+ continue;
+ strncpy(info->driver_name, i2c_devices[i].i2c_driver, KOBJ_NAME_LEN);
+ strncpy(info->type, i2c_devices[i].i2c_type, I2C_NAME_SIZE);
+ return 0;
+ }
+ return -ENODEV;
+}
+
+static void __init of_register_i2c_devices(struct device_node *adap_node, int bus_num)
+{
+ struct device_node *node = NULL;
+
+ while ((node = of_get_next_child(adap_node, node))) {
+ struct i2c_board_info info;
+ const u32 *addr;
+ int len;
+
+ addr = of_get_property(node, "reg", &len);
+ if (!addr || len < sizeof(int) || *addr > (1 << 10) - 1) {
+ printk(KERN_WARNING "fsl_ioc.c: invalid i2c device entry\n");
+ continue;
+ }
+
+ info.irq = irq_of_parse_and_map(node, 0);
+ if (info.irq == NO_IRQ)
+ info.irq = -1;
+
+ if (of_find_i2c_driver(node, &info) < 0)
+ continue;
+
+ info.platform_data = NULL;
+ info.addr = *addr;
+
+ i2c_register_board_info(bus_num, &info, 1);
+ }
+}
+
static int __init fsl_i2c_of_init(void)
{
struct device_node *np;
fsl_i2c_platform_data));
if (ret)
goto unreg;
+
+ of_register_i2c_devices(np, i);
}
return 0;
}
arch_initcall(fsl_i2c_of_init);
+#endif
#ifdef CONFIG_PPC_83xx
static int __init mpc83xx_wdt_init(void)
void __init setup_grackle(struct pci_controller *hose)
{
- setup_indirect_pci(hose, 0xfec00000, 0xfee00000);
+ setup_indirect_pci(hose, 0xfec00000, 0xfee00000, 0);
if (machine_is_compatible("PowerMac1,1"))
pci_assign_all_buses = 1;
if (machine_is_compatible("AAPL,PowerBook1998"))
#include <asm/pci-bridge.h>
#include <asm/machdep.h>
-#ifdef CONFIG_PPC_INDIRECT_PCI_BE
-#define PCI_CFG_OUT out_be32
-#else
-#define PCI_CFG_OUT out_le32
-#endif
-
static int
indirect_read_config(struct pci_bus *bus, unsigned int devfn, int offset,
int len, u32 *val)
u8 cfg_type = 0;
u32 bus_no, reg;
+ if (hose->indirect_type & PPC_INDIRECT_TYPE_NO_PCIE_LINK) {
+ if (bus->number != hose->first_busno)
+ return PCIBIOS_DEVICE_NOT_FOUND;
+ if (devfn != 0)
+ return PCIBIOS_DEVICE_NOT_FOUND;
+ }
+
if (ppc_md.pci_exclude_device)
if (ppc_md.pci_exclude_device(hose, bus->number, devfn))
return PCIBIOS_DEVICE_NOT_FOUND;
-
+
if (hose->indirect_type & PPC_INDIRECT_TYPE_SET_CFG_TYPE)
if (bus->number != hose->first_busno)
cfg_type = 1;
else
reg = offset & 0xfc;
- PCI_CFG_OUT(hose->cfg_addr,
- (0x80000000 | (bus_no << 16)
- | (devfn << 8) | reg | cfg_type));
+ if (hose->indirect_type & PPC_INDIRECT_TYPE_BIG_ENDIAN)
+ out_be32(hose->cfg_addr, (0x80000000 | (bus_no << 16) |
+ (devfn << 8) | reg | cfg_type));
+ else
+ out_le32(hose->cfg_addr, (0x80000000 | (bus_no << 16) |
+ (devfn << 8) | reg | cfg_type));
/*
* Note: the caller has already checked that offset is
u8 cfg_type = 0;
u32 bus_no, reg;
+ if (hose->indirect_type & PPC_INDIRECT_TYPE_NO_PCIE_LINK) {
+ if (bus->number != hose->first_busno)
+ return PCIBIOS_DEVICE_NOT_FOUND;
+ if (devfn != 0)
+ return PCIBIOS_DEVICE_NOT_FOUND;
+ }
+
if (ppc_md.pci_exclude_device)
if (ppc_md.pci_exclude_device(hose, bus->number, devfn))
return PCIBIOS_DEVICE_NOT_FOUND;
else
reg = offset & 0xfc;
- PCI_CFG_OUT(hose->cfg_addr,
- (0x80000000 | (bus_no << 16)
- | (devfn << 8) | reg | cfg_type));
+ if (hose->indirect_type & PPC_INDIRECT_TYPE_BIG_ENDIAN)
+ out_be32(hose->cfg_addr, (0x80000000 | (bus_no << 16) |
+ (devfn << 8) | reg | cfg_type));
+ else
+ out_le32(hose->cfg_addr, (0x80000000 | (bus_no << 16) |
+ (devfn << 8) | reg | cfg_type));
/* surpress setting of PCI_PRIMARY_BUS */
if (hose->indirect_type & PPC_INDIRECT_TYPE_SURPRESS_PRIMARY_BUS)
};
void __init
-setup_indirect_pci_nomap(struct pci_controller* hose, void __iomem * cfg_addr,
- void __iomem * cfg_data)
-{
- hose->cfg_addr = cfg_addr;
- hose->cfg_data = cfg_data;
- hose->ops = &indirect_pci_ops;
-}
-
-void __init
-setup_indirect_pci(struct pci_controller* hose, u32 cfg_addr, u32 cfg_data)
+setup_indirect_pci(struct pci_controller* hose, u32 cfg_addr, u32 cfg_data, u32 flags)
{
unsigned long base = cfg_addr & PAGE_MASK;
- void __iomem *mbase, *addr, *data;
+ void __iomem *mbase;
mbase = ioremap(base, PAGE_SIZE);
- addr = mbase + (cfg_addr & ~PAGE_MASK);
+ hose->cfg_addr = mbase + (cfg_addr & ~PAGE_MASK);
if ((cfg_data & PAGE_MASK) != base)
mbase = ioremap(cfg_data & PAGE_MASK, PAGE_SIZE);
- data = mbase + (cfg_data & ~PAGE_MASK);
- setup_indirect_pci_nomap(hose, addr, data);
+ hose->cfg_data = mbase + (cfg_data & ~PAGE_MASK);
+ hose->ops = &indirect_pci_ops;
+ hose->indirect_type = flags;
}
hose->first_busno = bus_range ? bus_range[0] : 0;
hose->last_busno = bus_range ? bus_range[1] : 0xff;
- setup_indirect_pci(hose, rsrc.start, rsrc.start + 4);
+ setup_indirect_pci(hose, rsrc.start, rsrc.start + 4, 0);
hose->self_busno = hose->first_busno;
printk(KERN_INFO "Found MV64x60 PCI host bridge at 0x%016llx. "
# CONFIG_IPMI_HANDLER is not set
# CONFIG_WATCHDOG is not set
CONFIG_HW_RANDOM=m
-CONFIG_RTC=m
+CONFIG_JS_RTC=m
# CONFIG_R3964 is not set
# CONFIG_APPLICOM is not set
# CONFIG_DRM is not set
EXPORT_SYMBOL(BTFIXUP_CALL(mmu_release_scsi_sgl));
EXPORT_SYMBOL(BTFIXUP_CALL(mmu_release_scsi_one));
+EXPORT_SYMBOL(BTFIXUP_CALL(pgprot_noncached));
+
#ifdef CONFIG_SBUS
EXPORT_SYMBOL(sbus_root);
EXPORT_SYMBOL(dma_chain);
/* Moving data to/from userspace. */
EXPORT_SYMBOL(__copy_user);
EXPORT_SYMBOL(__strncpy_from_user);
+EXPORT_SYMBOL(__strnlen_user);
/* Networking helper routines. */
EXPORT_SYMBOL(__csum_partial_copy_sparc_generic);
__ex_table : { *(__ex_table) }
__stop___ex_table = .;
+ NOTES
+
. = ALIGN(4096);
__init_begin = .;
_sinittext = .;
8:
add %o0, 1, %o0
subcc %o1, 1, %o1
- bne,a 8b
+ bne 8b
EX(stb %g3, [%o0 - 1], add %o1, 1)
0:
retl
*/
#include <linux/kernel.h>
+#include <linux/module.h>
#include <asm/openprom.h>
#include <asm/oplib.h>
prom_write(ppbuf, i);
}
+EXPORT_SYMBOL(prom_printf);
#
# Automatically generated make config: don't edit
-# Linux kernel version: 2.6.22
-# Thu Jul 19 21:30:37 2007
+# Linux kernel version: 2.6.23-rc1
+# Sun Jul 22 19:24:37 2007
#
CONFIG_SPARC=y
CONFIG_SPARC64=y
CONFIG_GENERIC_TIME=y
+CONFIG_GENERIC_CMOS_UPDATE=y
CONFIG_GENERIC_CLOCKEVENTS=y
CONFIG_64BIT=y
CONFIG_MMU=y
# CONFIG_ARCH_HAS_ILOG2_U64 is not set
CONFIG_AUDIT_ARCH=y
CONFIG_ARCH_NO_VIRT_TO_BUS=y
+CONFIG_OF=y
CONFIG_SPARC64_PAGE_SIZE_8KB=y
# CONFIG_SPARC64_PAGE_SIZE_64KB is not set
# CONFIG_SPARC64_PAGE_SIZE_512KB is not set
# CONFIG_SYS_HYPERVISOR is not set
CONFIG_CONNECTOR=m
# CONFIG_MTD is not set
+CONFIG_OF_DEVICE=y
# CONFIG_PARPORT is not set
CONFIG_BLK_DEV=y
# CONFIG_BLK_DEV_FD is not set
CONFIG_SCSI_ISCSI_ATTRS=m
# CONFIG_SCSI_SAS_ATTRS is not set
# CONFIG_SCSI_SAS_LIBSAS is not set
-
-#
-# SCSI low-level drivers
-#
+CONFIG_SCSI_LOWLEVEL=y
CONFIG_ISCSI_TCP=m
# CONFIG_BLK_DEV_3W_XXXX_RAID is not set
# CONFIG_SCSI_3W_9XXX is not set
# CONFIG_IPMI_HANDLER is not set
# CONFIG_WATCHDOG is not set
# CONFIG_HW_RANDOM is not set
-CONFIG_RTC=y
# CONFIG_R3964 is not set
# CONFIG_APPLICOM is not set
# CONFIG_DRM is not set
#
# CONFIG_DISPLAY_SUPPORT is not set
# CONFIG_VGASTATE is not set
+# CONFIG_VIDEO_OUTPUT_CONTROL is not set
CONFIG_FB=y
# CONFIG_FIRMWARE_EDID is not set
CONFIG_FB_DDC=y
CONFIG_SND_PCM_OSS=m
CONFIG_SND_PCM_OSS_PLUGINS=y
CONFIG_SND_SEQUENCER_OSS=y
-# CONFIG_SND_RTCTIMER is not set
# CONFIG_SND_DYNAMIC_MINORS is not set
CONFIG_SND_SUPPORT_OLD_API=y
CONFIG_SND_VERBOSE_PROCFS=y
#
# CONFIG_SND_SOC is not set
+#
+# SoC Audio support for SuperH
+#
+
#
# Open Sound System
#
#
# CONFIG_USB_GADGET is not set
# CONFIG_MMC is not set
-
-#
-# LED devices
-#
# CONFIG_NEW_LEDS is not set
-
-#
-# LED drivers
-#
-
-#
-# LED Triggers
-#
# CONFIG_INFINIBAND is not set
#
# Misc Linux/SPARC drivers
#
CONFIG_SUN_OPENPROMIO=m
-CONFIG_SUN_MOSTEK_RTC=y
# CONFIG_OBP_FLASH is not set
# CONFIG_SUN_BPP is not set
# CONFIG_BBC_I2C is not set
-/* $Id: head.S,v 1.87 2002/02/09 19:49:31 davem Exp $
- * head.S: Initial boot code for the Sparc64 port of Linux.
+/* head.S: Initial boot code for the Sparc64 port of Linux.
*
- * Copyright (C) 1996,1997 David S. Miller (davem@caip.rutgers.edu)
+ * Copyright (C) 1996, 1997, 2007 David S. Miller (davem@davemloft.net)
* Copyright (C) 1996 David Sitsky (David.Sitsky@anu.edu.au)
- * Copyright (C) 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
+ * Copyright (C) 1997, 1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
* Copyright (C) 1997 Miguel de Icaza (miguel@nuclecu.unam.mx)
*/
#include <linux/version.h>
#include <linux/errno.h>
#include <linux/threads.h>
+#include <linux/init.h>
#include <asm/thread_info.h>
#include <asm/asi.h>
#include <asm/pstate.h>
jmpl %g2 + %g0, %g0
nop
+ .section .text.init.refok
sun4u_init:
BRANCH_IF_SUN4V(g1, sun4v_init)
nop
/* Not reached... */
+ .previous
+
/* This is meant to allow the sharing of this code between
* boot processor invocation (via setup_tba() below) and
* secondary processor startup (via trampoline.S). The
}
EXPORT_SYMBOL(vio_send_sid);
-extern int vio_ldc_alloc(struct vio_driver_state *vio,
+int vio_ldc_alloc(struct vio_driver_state *vio,
struct ldc_channel_config *base_cfg,
void *event_arg)
{
__ex_table : { *(__ex_table) }
__stop___ex_table = .;
+ NOTES
+
. = ALIGN(PAGE_SIZE);
__init_begin = .;
.init.text : {
.remove = mem_remove,
};
-static int mem_mc_init(void)
+static int __init mem_mc_init(void)
{
if(can_drop_memory())
mconsole_register_dev(&mem_mc);
*/
static char *notify_socket = NULL;
-static int mconsole_init(void)
+static int __init mconsole_init(void)
{
/* long to avoid size mismatch warnings from gcc */
long sock;
return found;
}
-static int eth_setup(char *str)
+static int __init eth_setup(char *str)
{
struct eth_init *new;
char *error;
" Change the ubd device name to \"hd\".\n\n"
);
-static void do_ubd_request(request_queue_t * q);
+static void do_ubd_request(struct request_queue * q);
/* Only changed by ubd_init, which is an initcall. */
int thread_fd = -1;
}
/* Called with dev->lock held */
-static void do_ubd_request(request_queue_t *q)
+static void do_ubd_request(struct request_queue *q)
{
struct io_thread_req *io_req;
struct request *req;
}
#endif
-void mem_init(void)
+void __init mem_init(void)
{
/* clear the zero-page */
memset((void *) empty_zero_page, 0, PAGE_SIZE);
extern unsigned long long physmem_size;
-int init_maps(unsigned long physmem, unsigned long iomem, unsigned long highmem)
+int __init init_maps(unsigned long physmem, unsigned long iomem,
+ unsigned long highmem)
{
struct page *p, *map;
unsigned long phys_len, phys_pages, highmem_len, highmem_pages;
total_pages = phys_pages + iomem_pages + highmem_pages;
total_len = phys_len + iomem_len + highmem_len;
- if(kmalloc_ok){
- map = kmalloc(total_len, GFP_KERNEL);
- if(map == NULL)
- map = vmalloc(total_len);
- }
- else map = alloc_bootmem_low_pages(total_len);
-
+ map = alloc_bootmem_low_pages(total_len);
if(map == NULL)
return -ENOMEM;
extern int __syscall_stub_start;
-void setup_physmem(unsigned long start, unsigned long reserve_end,
- unsigned long len, unsigned long long highmem)
+void __init setup_physmem(unsigned long start, unsigned long reserve_end,
+ unsigned long len, unsigned long long highmem)
{
unsigned long reserve = reserve_end - start;
int pfn = PFN_UP(__pa(reserve_end));
extern void start_kernel(void);
-static int start_kernel_proc(void *unused)
+static int __init start_kernel_proc(void *unused)
{
int pid;
extern char cpu0_irqstack[];
-int start_uml_skas(void)
+int __init start_uml_skas(void)
{
stack_protections((unsigned long) &cpu0_irqstack);
set_sigstack(cpu0_irqstack, THREAD_SIZE);
#include "init.h"
#include "user.h"
#include "mode.h"
+#include "kern_constants.h"
struct aio_thread_req {
enum aio_type type;
static int do_aio(aio_context_t ctx, enum aio_type type, int fd, char *buf,
int len, unsigned long long offset, struct aio_context *aio)
{
- struct iocb iocb, *iocbp = &iocb;
+ struct iocb *iocbp = & ((struct iocb) {
+ .aio_data = (unsigned long) aio,
+ .aio_fildes = fd,
+ .aio_buf = (unsigned long) buf,
+ .aio_nbytes = len,
+ .aio_offset = offset
+ });
char c;
- int err;
- iocb = ((struct iocb) { .aio_data = (unsigned long) aio,
- .aio_reqprio = 0,
- .aio_fildes = fd,
- .aio_buf = (unsigned long) buf,
- .aio_nbytes = len,
- .aio_offset = offset,
- .aio_reserved1 = 0,
- .aio_reserved2 = 0,
- .aio_reserved3 = 0 });
-
- switch(type){
+ switch (type) {
case AIO_READ:
- iocb.aio_lio_opcode = IOCB_CMD_PREAD;
- err = io_submit(ctx, 1, &iocbp);
+ iocbp->aio_lio_opcode = IOCB_CMD_PREAD;
break;
case AIO_WRITE:
- iocb.aio_lio_opcode = IOCB_CMD_PWRITE;
- err = io_submit(ctx, 1, &iocbp);
+ iocbp->aio_lio_opcode = IOCB_CMD_PWRITE;
break;
case AIO_MMAP:
- iocb.aio_lio_opcode = IOCB_CMD_PREAD;
- iocb.aio_buf = (unsigned long) &c;
- iocb.aio_nbytes = sizeof(c);
- err = io_submit(ctx, 1, &iocbp);
+ iocbp->aio_lio_opcode = IOCB_CMD_PREAD;
+ iocbp->aio_buf = (unsigned long) &c;
+ iocbp->aio_nbytes = sizeof(c);
break;
default:
- printk("Bogus op in do_aio - %d\n", type);
- err = -EINVAL;
- break;
+ printk(UM_KERN_ERR "Bogus op in do_aio - %d\n", type);
+ return -EINVAL;
}
- if(err > 0)
- err = 0;
- else
- err = -errno;
-
- return err;
+ return (io_submit(ctx, 1, &iocbp) > 0) ? 0 : -errno;
}
/* Initialized in an initcall and unchanged thereafter */
#define MADV_REMOVE KERNEL_MADV_REMOVE
#endif
-int __init os_drop_memory(void *addr, int length)
+int os_drop_memory(void *addr, int length)
{
int err;
extern void *memset(void *, int, size_t);
extern int printf(const char *, ...);
-/* If they're not defined, the export is included in lib/string.c.*/
-#ifdef __HAVE_ARCH_STRLEN
-EXPORT_SYMBOL(strlen);
-#endif
+/* If it's not defined, the export is included in lib/string.c.*/
#ifdef __HAVE_ARCH_STRSTR
EXPORT_SYMBOL(strstr);
#endif
obj-$(CONFIG_MODE_SKAS) += stub.o stub_segv.o
-subarch-obj-y = lib/bitops.o lib/semaphore.o
+subarch-obj-y = lib/bitops.o lib/semaphore.o lib/string.o
subarch-obj-$(CONFIG_HIGHMEM) += mm/highmem.o
subarch-obj-$(CONFIG_MODULES) += kernel/module.o
depends on IA32_EMULATION
default y
+config COMPAT_FOR_U64_ALIGNMENT
+ def_bool COMPAT
+
config SYSVIPC_COMPAT
bool
depends on COMPAT && SYSVIPC
#undef ARCH_DLINFO
#define ARCH_DLINFO do { \
if (sysctl_vsyscall32) { \
- NEW_AUX_ENT(AT_SYSINFO, (u32)(u64)VSYSCALL32_VSYSCALL); \
- NEW_AUX_ENT(AT_SYSINFO_EHDR, VSYSCALL32_BASE); \
+ current->mm->context.vdso = (void *)VSYSCALL32_BASE; \
+ NEW_AUX_ENT(AT_SYSINFO, (u32)(u64)VSYSCALL32_VSYSCALL); \
+ NEW_AUX_ENT(AT_SYSINFO_EHDR, VSYSCALL32_BASE); \
} \
} while(0)
return ret;
}
-const char *arch_vma_name(struct vm_area_struct *vma)
-{
- if (vma->vm_start == VSYSCALL32_BASE &&
- vma->vm_mm && vma->vm_mm->task_size == IA32_PAGE_OFFSET)
- return "[vdso]";
- return NULL;
-}
-
static int __init init_syscall32(void)
{
char *syscall32_page = (void *)get_zeroed_page(GFP_KERNEL);
obj-y := boot.o
boot-y := ../../../i386/kernel/acpi/boot.o
-obj-$(CONFIG_ACPI_SLEEP) += sleep.o wakeup.o
+obj-y += sleep.o wakeup.o
ifneq ($(CONFIG_ACPI_PROCESSOR),)
obj-y += processor.o
Low-Level Sleep Support
-------------------------------------------------------------------------- */
-#ifdef CONFIG_ACPI_SLEEP
-
/* address in low memory of the wakeup routine. */
unsigned long acpi_wakeup_address = 0;
unsigned long acpi_realmode_flags;
__setup("acpi_sleep=", acpi_sleep_setup);
-#endif /*CONFIG_ACPI_SLEEP */
-
void acpi_pci_link_exit(void)
{
}
addq %rbp, trampoline_level4_pgt + 0(%rip)
addq %rbp, trampoline_level4_pgt + (511*8)(%rip)
#endif
-#ifdef CONFIG_ACPI_SLEEP
+#ifdef CONFIG_ACPI
addq %rbp, wakeup_level4_pgt + 0(%rip)
addq %rbp, wakeup_level4_pgt + (511*8)(%rip)
#endif
reserve_bootmem_generic(SMP_TRAMPOLINE_BASE, 2*PAGE_SIZE);
#endif
-#ifdef CONFIG_ACPI_SLEEP
+#ifdef CONFIG_ACPI
/*
* Reserve low memory region for sleep support.
*/
return ret;
}
-void* alloc_tce_table(void)
+void * __init alloc_tce_table(void)
{
unsigned int size;
return __alloc_bootmem_low(size, size, 0);
}
-void free_tce_table(void *tbl)
+void __init free_tce_table(void *tbl)
{
unsigned int size;
#endif
-static int tsc_unstable = 0;
-
/*
* Make an educated guess if the TSC is trustworthy and synchronized
* over all CPUs.
{
unsigned long start = (unsigned long)_stext, end;
+#ifdef CONFIG_HOTPLUG_CPU
+ /* It must still be possible to apply SMP alternatives. */
+ if (num_possible_cpus() > 1)
+ start = (unsigned long)_etext;
+#endif
+
+#ifdef CONFIG_KPROBES
+ start = (unsigned long)__start_rodata;
+#endif
+
end = (unsigned long)__end_rodata;
start = (start + PAGE_SIZE - 1) & PAGE_MASK;
end &= PAGE_MASK;
If unsure, say Y.
-endif # BLOCK
-
config BLK_DEV_BSG
bool "Block layer SG support v4 (EXPERIMENTAL)"
depends on EXPERIMENTAL
protocols (e.g. Task Management Functions and SMP in Serial
Attached SCSI).
+endif # BLOCK
+
source block/Kconfig.iosched
* as_completed_request is to be called when a request has completed and
* returned something to the requesting process, be it an error or data.
*/
-static void as_completed_request(request_queue_t *q, struct request *rq)
+static void as_completed_request(struct request_queue *q, struct request *rq)
{
struct as_data *ad = q->elevator->elevator_data;
* reference unless it replaces the request at somepart of the elevator
* (ie. the dispatch queue)
*/
-static void as_remove_queued_request(request_queue_t *q, struct request *rq)
+static void as_remove_queued_request(struct request_queue *q,
+ struct request *rq)
{
const int data_dir = rq_is_sync(rq);
struct as_data *ad = q->elevator->elevator_data;
* read/write expire, batch expire, etc, and moves it to the dispatch
* queue. Returns 1 if a request was found, 0 otherwise.
*/
-static int as_dispatch_request(request_queue_t *q, int force)
+static int as_dispatch_request(struct request_queue *q, int force)
{
struct as_data *ad = q->elevator->elevator_data;
const int reads = !list_empty(&ad->fifo_list[REQ_SYNC]);
/*
* add rq to rbtree and fifo
*/
-static void as_add_request(request_queue_t *q, struct request *rq)
+static void as_add_request(struct request_queue *q, struct request *rq)
{
struct as_data *ad = q->elevator->elevator_data;
int data_dir;
RQ_SET_STATE(rq, AS_RQ_QUEUED);
}
-static void as_activate_request(request_queue_t *q, struct request *rq)
+static void as_activate_request(struct request_queue *q, struct request *rq)
{
WARN_ON(RQ_STATE(rq) != AS_RQ_DISPATCHED);
RQ_SET_STATE(rq, AS_RQ_REMOVED);
atomic_dec(&RQ_IOC(rq)->aic->nr_dispatched);
}
-static void as_deactivate_request(request_queue_t *q, struct request *rq)
+static void as_deactivate_request(struct request_queue *q, struct request *rq)
{
WARN_ON(RQ_STATE(rq) != AS_RQ_REMOVED);
RQ_SET_STATE(rq, AS_RQ_DISPATCHED);
* is not empty - it is used in the block layer to check for plugging and
* merging opportunities
*/
-static int as_queue_empty(request_queue_t *q)
+static int as_queue_empty(struct request_queue *q)
{
struct as_data *ad = q->elevator->elevator_data;
}
static int
-as_merge(request_queue_t *q, struct request **req, struct bio *bio)
+as_merge(struct request_queue *q, struct request **req, struct bio *bio)
{
struct as_data *ad = q->elevator->elevator_data;
sector_t rb_key = bio->bi_sector + bio_sectors(bio);
return ELEVATOR_NO_MERGE;
}
-static void as_merged_request(request_queue_t *q, struct request *req, int type)
+static void as_merged_request(struct request_queue *q, struct request *req,
+ int type)
{
struct as_data *ad = q->elevator->elevator_data;
}
}
-static void as_merged_requests(request_queue_t *q, struct request *req,
+static void as_merged_requests(struct request_queue *q, struct request *req,
struct request *next)
{
/*
spin_unlock_irqrestore(q->queue_lock, flags);
}
-static int as_may_queue(request_queue_t *q, int rw)
+static int as_may_queue(struct request_queue *q, int rw)
{
int ret = ELV_MQUEUE_MAY;
struct as_data *ad = q->elevator->elevator_data;
/*
* initialize elevator private data (as_data).
*/
-static void *as_init_queue(request_queue_t *q)
+static void *as_init_queue(struct request_queue *q)
{
struct as_data *ad;
const int cpu = smp_processor_id();
t->magic = BLK_IO_TRACE_MAGIC | BLK_IO_TRACE_VERSION;
- t->time = sched_clock() - per_cpu(blk_trace_cpu_offset, cpu);
+ t->time = cpu_clock(cpu) - per_cpu(blk_trace_cpu_offset, cpu);
t->device = bt->dev;
t->action = action;
t->pid = pid;
t->magic = BLK_IO_TRACE_MAGIC | BLK_IO_TRACE_VERSION;
t->sequence = ++(*sequence);
- t->time = sched_clock() - per_cpu(blk_trace_cpu_offset, cpu);
+ t->time = cpu_clock(cpu) - per_cpu(blk_trace_cpu_offset, cpu);
t->sector = sector;
t->bytes = bytes;
t->action = what;
kfree(bt);
}
-static int blk_trace_remove(request_queue_t *q)
+static int blk_trace_remove(struct request_queue *q)
{
struct blk_trace *bt;
/*
* Setup everything required to start tracing
*/
-static int blk_trace_setup(request_queue_t *q, struct block_device *bdev,
+static int blk_trace_setup(struct request_queue *q, struct block_device *bdev,
char __user *arg)
{
struct blk_user_trace_setup buts;
return ret;
}
-static int blk_trace_startstop(request_queue_t *q, int start)
+static int blk_trace_startstop(struct request_queue *q, int start)
{
struct blk_trace *bt;
int ret;
**/
int blk_trace_ioctl(struct block_device *bdev, unsigned cmd, char __user *arg)
{
- request_queue_t *q;
+ struct request_queue *q;
int ret, start = 0;
q = bdev_get_queue(bdev);
* @q: the request queue associated with the device
*
**/
-void blk_trace_shutdown(request_queue_t *q)
+void blk_trace_shutdown(struct request_queue *q)
{
if (q->blk_trace) {
blk_trace_startstop(q, 0);
}
/*
- * Average offset over two calls to sched_clock() with a gettimeofday()
+ * Average offset over two calls to cpu_clock() with a gettimeofday()
* in the middle
*/
-static void blk_check_time(unsigned long long *t)
+static void blk_check_time(unsigned long long *t, int this_cpu)
{
unsigned long long a, b;
struct timeval tv;
- a = sched_clock();
+ a = cpu_clock(this_cpu);
do_gettimeofday(&tv);
- b = sched_clock();
+ b = cpu_clock(this_cpu);
*t = tv.tv_sec * 1000000000 + tv.tv_usec * 1000;
*t -= (a + b) / 2;
static void blk_trace_check_cpu_time(void *data)
{
unsigned long long *t;
- int cpu = get_cpu();
+ int this_cpu = get_cpu();
- t = &per_cpu(blk_trace_cpu_offset, cpu);
+ t = &per_cpu(blk_trace_cpu_offset, this_cpu);
/*
* Just call it twice, hopefully the second call will be cache hot
* and a little more precise
*/
- blk_check_time(t);
- blk_check_time(t);
+ blk_check_time(t, this_cpu);
+ blk_check_time(t, this_cpu);
put_cpu();
}
#define BSG_VERSION "0.4"
struct bsg_device {
- request_queue_t *queue;
+ struct request_queue *queue;
spinlock_t lock;
struct list_head busy_list;
struct list_head done_list;
return ret;
}
-static int blk_fill_sgv4_hdr_rq(request_queue_t *q, struct request *rq,
+static int blk_fill_sgv4_hdr_rq(struct request_queue *q, struct request *rq,
struct sg_io_v4 *hdr, int has_write_perm)
{
memset(rq->cmd, 0, BLK_MAX_CDB); /* ATAPI hates garbage after CDB */
* Check if sg_io_v4 from user is allowed and valid
*/
static int
-bsg_validate_sgv4_hdr(request_queue_t *q, struct sg_io_v4 *hdr, int *rw)
+bsg_validate_sgv4_hdr(struct request_queue *q, struct sg_io_v4 *hdr, int *rw)
{
int ret = 0;
static struct request *
bsg_map_hdr(struct bsg_device *bd, struct sg_io_v4 *hdr)
{
- request_queue_t *q = bd->queue;
+ struct request_queue *q = bd->queue;
struct request *rq, *next_rq = NULL;
int ret, rw;
unsigned int dxfer_len;
* do final setup of a 'bc' and submit the matching 'rq' to the block
* layer for io
*/
-static void bsg_add_command(struct bsg_device *bd, request_queue_t *q,
+static void bsg_add_command(struct bsg_device *bd, struct request_queue *q,
struct bsg_command *bc, struct request *rq)
{
rq->sense = bc->sense;
bc = NULL;
ret = 0;
while (nr_commands) {
- request_queue_t *q = bd->queue;
+ struct request_queue *q = bd->queue;
bc = bsg_alloc_command(bd);
if (IS_ERR(bc)) {
* Per block device queue structure
*/
struct cfq_data {
- request_queue_t *queue;
+ struct request_queue *queue;
/*
* rr list of queues with requests and the count of them
CFQ_CFQQ_FNS(sync);
#undef CFQ_CFQQ_FNS
-static void cfq_dispatch_insert(request_queue_t *, struct request *);
+static void cfq_dispatch_insert(struct request_queue *, struct request *);
static struct cfq_queue *cfq_get_queue(struct cfq_data *, int,
struct task_struct *, gfp_t);
static struct cfq_io_context *cfq_cic_rb_lookup(struct cfq_data *,
kblockd_schedule_work(&cfqd->unplug_work);
}
-static int cfq_queue_empty(request_queue_t *q)
+static int cfq_queue_empty(struct request_queue *q)
{
struct cfq_data *cfqd = q->elevator->elevator_data;
return NULL;
}
-static void cfq_activate_request(request_queue_t *q, struct request *rq)
+static void cfq_activate_request(struct request_queue *q, struct request *rq)
{
struct cfq_data *cfqd = q->elevator->elevator_data;
cfqd->last_position = rq->hard_sector + rq->hard_nr_sectors;
}
-static void cfq_deactivate_request(request_queue_t *q, struct request *rq)
+static void cfq_deactivate_request(struct request_queue *q, struct request *rq)
{
struct cfq_data *cfqd = q->elevator->elevator_data;
}
}
-static int cfq_merge(request_queue_t *q, struct request **req, struct bio *bio)
+static int cfq_merge(struct request_queue *q, struct request **req,
+ struct bio *bio)
{
struct cfq_data *cfqd = q->elevator->elevator_data;
struct request *__rq;
return ELEVATOR_NO_MERGE;
}
-static void cfq_merged_request(request_queue_t *q, struct request *req,
+static void cfq_merged_request(struct request_queue *q, struct request *req,
int type)
{
if (type == ELEVATOR_FRONT_MERGE) {
}
static void
-cfq_merged_requests(request_queue_t *q, struct request *rq,
+cfq_merged_requests(struct request_queue *q, struct request *rq,
struct request *next)
{
/*
cfq_remove_request(next);
}
-static int cfq_allow_merge(request_queue_t *q, struct request *rq,
+static int cfq_allow_merge(struct request_queue *q, struct request *rq,
struct bio *bio)
{
struct cfq_data *cfqd = q->elevator->elevator_data;
/*
* Move request from internal lists to the request queue dispatch list.
*/
-static void cfq_dispatch_insert(request_queue_t *q, struct request *rq)
+static void cfq_dispatch_insert(struct request_queue *q, struct request *rq)
{
struct cfq_data *cfqd = q->elevator->elevator_data;
struct cfq_queue *cfqq = RQ_CFQQ(rq);
return dispatched;
}
-static int cfq_dispatch_requests(request_queue_t *q, int force)
+static int cfq_dispatch_requests(struct request_queue *q, int force)
{
struct cfq_data *cfqd = q->elevator->elevator_data;
struct cfq_queue *cfqq;
struct cfq_data *cfqd = cic->key;
if (cfqd) {
- request_queue_t *q = cfqd->queue;
+ struct request_queue *q = cfqd->queue;
spin_lock_irq(q->queue_lock);
__cfq_exit_single_io_context(cfqd, cic);
}
}
-static void cfq_insert_request(request_queue_t *q, struct request *rq)
+static void cfq_insert_request(struct request_queue *q, struct request *rq)
{
struct cfq_data *cfqd = q->elevator->elevator_data;
struct cfq_queue *cfqq = RQ_CFQQ(rq);
cfq_rq_enqueued(cfqd, cfqq, rq);
}
-static void cfq_completed_request(request_queue_t *q, struct request *rq)
+static void cfq_completed_request(struct request_queue *q, struct request *rq)
{
struct cfq_queue *cfqq = RQ_CFQQ(rq);
struct cfq_data *cfqd = cfqq->cfqd;
return ELV_MQUEUE_MAY;
}
-static int cfq_may_queue(request_queue_t *q, int rw)
+static int cfq_may_queue(struct request_queue *q, int rw)
{
struct cfq_data *cfqd = q->elevator->elevator_data;
struct task_struct *tsk = current;
* Allocate cfq data structures associated with this request.
*/
static int
-cfq_set_request(request_queue_t *q, struct request *rq, gfp_t gfp_mask)
+cfq_set_request(struct request_queue *q, struct request *rq, gfp_t gfp_mask)
{
struct cfq_data *cfqd = q->elevator->elevator_data;
struct task_struct *tsk = current;
{
struct cfq_data *cfqd =
container_of(work, struct cfq_data, unplug_work);
- request_queue_t *q = cfqd->queue;
+ struct request_queue *q = cfqd->queue;
unsigned long flags;
spin_lock_irqsave(q->queue_lock, flags);
static void cfq_exit_queue(elevator_t *e)
{
struct cfq_data *cfqd = e->elevator_data;
- request_queue_t *q = cfqd->queue;
+ struct request_queue *q = cfqd->queue;
cfq_shutdown_timer_wq(cfqd);
kfree(cfqd);
}
-static void *cfq_init_queue(request_queue_t *q)
+static void *cfq_init_queue(struct request_queue *q)
{
struct cfq_data *cfqd;
/*
* remove rq from rbtree and fifo.
*/
-static void deadline_remove_request(request_queue_t *q, struct request *rq)
+static void deadline_remove_request(struct request_queue *q, struct request *rq)
{
struct deadline_data *dd = q->elevator->elevator_data;
}
static int
-deadline_merge(request_queue_t *q, struct request **req, struct bio *bio)
+deadline_merge(struct request_queue *q, struct request **req, struct bio *bio)
{
struct deadline_data *dd = q->elevator->elevator_data;
struct request *__rq;
return ret;
}
-static void deadline_merged_request(request_queue_t *q, struct request *req,
- int type)
+static void deadline_merged_request(struct request_queue *q,
+ struct request *req, int type)
{
struct deadline_data *dd = q->elevator->elevator_data;
}
static void
-deadline_merged_requests(request_queue_t *q, struct request *req,
+deadline_merged_requests(struct request_queue *q, struct request *req,
struct request *next)
{
/*
static inline void
deadline_move_to_dispatch(struct deadline_data *dd, struct request *rq)
{
- request_queue_t *q = rq->q;
+ struct request_queue *q = rq->q;
deadline_remove_request(q, rq);
elv_dispatch_add_tail(q, rq);
* deadline_dispatch_requests selects the best request according to
* read/write expire, fifo_batch, etc
*/
-static int deadline_dispatch_requests(request_queue_t *q, int force)
+static int deadline_dispatch_requests(struct request_queue *q, int force)
{
struct deadline_data *dd = q->elevator->elevator_data;
const int reads = !list_empty(&dd->fifo_list[READ]);
return 1;
}
-static int deadline_queue_empty(request_queue_t *q)
+static int deadline_queue_empty(struct request_queue *q)
{
struct deadline_data *dd = q->elevator->elevator_data;
/*
* initialize elevator private data (deadline_data).
*/
-static void *deadline_init_queue(request_queue_t *q)
+static void *deadline_init_queue(struct request_queue *q)
{
struct deadline_data *dd;
*/
static int elv_iosched_allow_merge(struct request *rq, struct bio *bio)
{
- request_queue_t *q = rq->q;
+ struct request_queue *q = rq->q;
elevator_t *e = q->elevator;
if (e->ops->elevator_allow_merge_fn)
return e;
}
-static void *elevator_init_queue(request_queue_t *q, struct elevator_queue *eq)
+static void *elevator_init_queue(struct request_queue *q,
+ struct elevator_queue *eq)
{
return eq->ops->elevator_init_fn(q);
}
-static void elevator_attach(request_queue_t *q, struct elevator_queue *eq,
+static void elevator_attach(struct request_queue *q, struct elevator_queue *eq,
void *data)
{
q->elevator = eq;
static struct kobj_type elv_ktype;
-static elevator_t *elevator_alloc(request_queue_t *q, struct elevator_type *e)
+static elevator_t *elevator_alloc(struct request_queue *q,
+ struct elevator_type *e)
{
elevator_t *eq;
int i;
kfree(e);
}
-int elevator_init(request_queue_t *q, char *name)
+int elevator_init(struct request_queue *q, char *name)
{
struct elevator_type *e = NULL;
struct elevator_queue *eq;
EXPORT_SYMBOL(elevator_exit);
-static void elv_activate_rq(request_queue_t *q, struct request *rq)
+static void elv_activate_rq(struct request_queue *q, struct request *rq)
{
elevator_t *e = q->elevator;
e->ops->elevator_activate_req_fn(q, rq);
}
-static void elv_deactivate_rq(request_queue_t *q, struct request *rq)
+static void elv_deactivate_rq(struct request_queue *q, struct request *rq)
{
elevator_t *e = q->elevator;
hlist_del_init(&rq->hash);
}
-static void elv_rqhash_del(request_queue_t *q, struct request *rq)
+static void elv_rqhash_del(struct request_queue *q, struct request *rq)
{
if (ELV_ON_HASH(rq))
__elv_rqhash_del(rq);
}
-static void elv_rqhash_add(request_queue_t *q, struct request *rq)
+static void elv_rqhash_add(struct request_queue *q, struct request *rq)
{
elevator_t *e = q->elevator;
hlist_add_head(&rq->hash, &e->hash[ELV_HASH_FN(rq_hash_key(rq))]);
}
-static void elv_rqhash_reposition(request_queue_t *q, struct request *rq)
+static void elv_rqhash_reposition(struct request_queue *q, struct request *rq)
{
__elv_rqhash_del(rq);
elv_rqhash_add(q, rq);
}
-static struct request *elv_rqhash_find(request_queue_t *q, sector_t offset)
+static struct request *elv_rqhash_find(struct request_queue *q, sector_t offset)
{
elevator_t *e = q->elevator;
struct hlist_head *hash_list = &e->hash[ELV_HASH_FN(offset)];
* entry. rq is sort insted into the dispatch queue. To be used by
* specific elevators.
*/
-void elv_dispatch_sort(request_queue_t *q, struct request *rq)
+void elv_dispatch_sort(struct request_queue *q, struct request *rq)
{
sector_t boundary;
struct list_head *entry;
EXPORT_SYMBOL(elv_dispatch_add_tail);
-int elv_merge(request_queue_t *q, struct request **req, struct bio *bio)
+int elv_merge(struct request_queue *q, struct request **req, struct bio *bio)
{
elevator_t *e = q->elevator;
struct request *__rq;
return ELEVATOR_NO_MERGE;
}
-void elv_merged_request(request_queue_t *q, struct request *rq, int type)
+void elv_merged_request(struct request_queue *q, struct request *rq, int type)
{
elevator_t *e = q->elevator;
q->last_merge = rq;
}
-void elv_merge_requests(request_queue_t *q, struct request *rq,
+void elv_merge_requests(struct request_queue *q, struct request *rq,
struct request *next)
{
elevator_t *e = q->elevator;
q->last_merge = rq;
}
-void elv_requeue_request(request_queue_t *q, struct request *rq)
+void elv_requeue_request(struct request_queue *q, struct request *rq)
{
/*
* it already went through dequeue, we need to decrement the
elv_insert(q, rq, ELEVATOR_INSERT_REQUEUE);
}
-static void elv_drain_elevator(request_queue_t *q)
+static void elv_drain_elevator(struct request_queue *q)
{
static int printed;
while (q->elevator->ops->elevator_dispatch_fn(q, 1))
}
}
-void elv_insert(request_queue_t *q, struct request *rq, int where)
+void elv_insert(struct request_queue *q, struct request *rq, int where)
{
struct list_head *pos;
unsigned ordseq;
}
}
-void __elv_add_request(request_queue_t *q, struct request *rq, int where,
+void __elv_add_request(struct request_queue *q, struct request *rq, int where,
int plug)
{
if (q->ordcolor)
EXPORT_SYMBOL(__elv_add_request);
-void elv_add_request(request_queue_t *q, struct request *rq, int where,
+void elv_add_request(struct request_queue *q, struct request *rq, int where,
int plug)
{
unsigned long flags;
EXPORT_SYMBOL(elv_add_request);
-static inline struct request *__elv_next_request(request_queue_t *q)
+static inline struct request *__elv_next_request(struct request_queue *q)
{
struct request *rq;
}
}
-struct request *elv_next_request(request_queue_t *q)
+struct request *elv_next_request(struct request_queue *q)
{
struct request *rq;
int ret;
EXPORT_SYMBOL(elv_next_request);
-void elv_dequeue_request(request_queue_t *q, struct request *rq)
+void elv_dequeue_request(struct request_queue *q, struct request *rq)
{
BUG_ON(list_empty(&rq->queuelist));
BUG_ON(ELV_ON_HASH(rq));
EXPORT_SYMBOL(elv_dequeue_request);
-int elv_queue_empty(request_queue_t *q)
+int elv_queue_empty(struct request_queue *q)
{
elevator_t *e = q->elevator;
EXPORT_SYMBOL(elv_queue_empty);
-struct request *elv_latter_request(request_queue_t *q, struct request *rq)
+struct request *elv_latter_request(struct request_queue *q, struct request *rq)
{
elevator_t *e = q->elevator;
return NULL;
}
-struct request *elv_former_request(request_queue_t *q, struct request *rq)
+struct request *elv_former_request(struct request_queue *q, struct request *rq)
{
elevator_t *e = q->elevator;
return NULL;
}
-int elv_set_request(request_queue_t *q, struct request *rq, gfp_t gfp_mask)
+int elv_set_request(struct request_queue *q, struct request *rq, gfp_t gfp_mask)
{
elevator_t *e = q->elevator;
return 0;
}
-void elv_put_request(request_queue_t *q, struct request *rq)
+void elv_put_request(struct request_queue *q, struct request *rq)
{
elevator_t *e = q->elevator;
e->ops->elevator_put_req_fn(rq);
}
-int elv_may_queue(request_queue_t *q, int rw)
+int elv_may_queue(struct request_queue *q, int rw)
{
elevator_t *e = q->elevator;
return ELV_MQUEUE_MAY;
}
-void elv_completed_request(request_queue_t *q, struct request *rq)
+void elv_completed_request(struct request_queue *q, struct request *rq)
{
elevator_t *e = q->elevator;
* need for the new one. this way we have a chance of going back to the old
* one, if the new one fails init for some reason.
*/
-static int elevator_switch(request_queue_t *q, struct elevator_type *new_e)
+static int elevator_switch(struct request_queue *q, struct elevator_type *new_e)
{
elevator_t *old_elevator, *e;
void *data;
return 0;
}
-ssize_t elv_iosched_store(request_queue_t *q, const char *name, size_t count)
+ssize_t elv_iosched_store(struct request_queue *q, const char *name,
+ size_t count)
{
char elevator_name[ELV_NAME_MAX];
size_t len;
return count;
}
-ssize_t elv_iosched_show(request_queue_t *q, char *name)
+ssize_t elv_iosched_show(struct request_queue *q, char *name)
{
elevator_t *e = q->elevator;
struct elevator_type *elv = e->elevator_type;
return len;
}
-struct request *elv_rb_former_request(request_queue_t *q, struct request *rq)
+struct request *elv_rb_former_request(struct request_queue *q,
+ struct request *rq)
{
struct rb_node *rbprev = rb_prev(&rq->rb_node);
EXPORT_SYMBOL(elv_rb_former_request);
-struct request *elv_rb_latter_request(request_queue_t *q, struct request *rq)
+struct request *elv_rb_latter_request(struct request_queue *q,
+ struct request *rq)
{
struct rb_node *rbnext = rb_next(&rq->rb_node);
static void blk_unplug_timeout(unsigned long data);
static void drive_stat_acct(struct request *rq, int nr_sectors, int new_io);
static void init_request_from_bio(struct request *req, struct bio *bio);
-static int __make_request(request_queue_t *q, struct bio *bio);
+static int __make_request(struct request_queue *q, struct bio *bio);
static struct io_context *current_io_context(gfp_t gfp_flags, int node);
/*
struct backing_dev_info *blk_get_backing_dev_info(struct block_device *bdev)
{
struct backing_dev_info *ret = NULL;
- request_queue_t *q = bdev_get_queue(bdev);
+ struct request_queue *q = bdev_get_queue(bdev);
if (q)
ret = &q->backing_dev_info;
* cdb from the request data for instance.
*
*/
-void blk_queue_prep_rq(request_queue_t *q, prep_rq_fn *pfn)
+void blk_queue_prep_rq(struct request_queue *q, prep_rq_fn *pfn)
{
q->prep_rq_fn = pfn;
}
* no merge_bvec_fn is defined for a queue, and only the fixed limits are
* honored.
*/
-void blk_queue_merge_bvec(request_queue_t *q, merge_bvec_fn *mbfn)
+void blk_queue_merge_bvec(struct request_queue *q, merge_bvec_fn *mbfn)
{
q->merge_bvec_fn = mbfn;
}
EXPORT_SYMBOL(blk_queue_merge_bvec);
-void blk_queue_softirq_done(request_queue_t *q, softirq_done_fn *fn)
+void blk_queue_softirq_done(struct request_queue *q, softirq_done_fn *fn)
{
q->softirq_done_fn = fn;
}
* __bio_kmap_atomic() to get a temporary kernel mapping, or by calling
* blk_queue_bounce() to create a buffer in normal memory.
**/
-void blk_queue_make_request(request_queue_t * q, make_request_fn * mfn)
+void blk_queue_make_request(struct request_queue * q, make_request_fn * mfn)
{
/*
* set defaults
EXPORT_SYMBOL(blk_queue_make_request);
-static void rq_init(request_queue_t *q, struct request *rq)
+static void rq_init(struct request_queue *q, struct request *rq)
{
INIT_LIST_HEAD(&rq->queuelist);
INIT_LIST_HEAD(&rq->donelist);
* feature should call this function and indicate so.
*
**/
-int blk_queue_ordered(request_queue_t *q, unsigned ordered,
+int blk_queue_ordered(struct request_queue *q, unsigned ordered,
prepare_flush_fn *prepare_flush_fn)
{
if (ordered & (QUEUE_ORDERED_PREFLUSH | QUEUE_ORDERED_POSTFLUSH) &&
* to the block layer by defining it through this call.
*
**/
-void blk_queue_issue_flush_fn(request_queue_t *q, issue_flush_fn *iff)
+void blk_queue_issue_flush_fn(struct request_queue *q, issue_flush_fn *iff)
{
q->issue_flush_fn = iff;
}
/*
* Cache flushing for ordered writes handling
*/
-inline unsigned blk_ordered_cur_seq(request_queue_t *q)
+inline unsigned blk_ordered_cur_seq(struct request_queue *q)
{
if (!q->ordseq)
return 0;
unsigned blk_ordered_req_seq(struct request *rq)
{
- request_queue_t *q = rq->q;
+ struct request_queue *q = rq->q;
BUG_ON(q->ordseq == 0);
return QUEUE_ORDSEQ_DONE;
}
-void blk_ordered_complete_seq(request_queue_t *q, unsigned seq, int error)
+void blk_ordered_complete_seq(struct request_queue *q, unsigned seq, int error)
{
struct request *rq;
int uptodate;
blk_ordered_complete_seq(rq->q, QUEUE_ORDSEQ_POSTFLUSH, error);
}
-static void queue_flush(request_queue_t *q, unsigned which)
+static void queue_flush(struct request_queue *q, unsigned which)
{
struct request *rq;
rq_end_io_fn *end_io;
elv_insert(q, rq, ELEVATOR_INSERT_FRONT);
}
-static inline struct request *start_ordered(request_queue_t *q,
+static inline struct request *start_ordered(struct request_queue *q,
struct request *rq)
{
q->bi_size = 0;
return rq;
}
-int blk_do_ordered(request_queue_t *q, struct request **rqp)
+int blk_do_ordered(struct request_queue *q, struct request **rqp)
{
struct request *rq = *rqp;
int is_barrier = blk_fs_request(rq) && blk_barrier_rq(rq);
static int flush_dry_bio_endio(struct bio *bio, unsigned int bytes, int error)
{
- request_queue_t *q = bio->bi_private;
+ struct request_queue *q = bio->bi_private;
/*
* This is dry run, restore bio_sector and size. We'll finish
static int ordered_bio_endio(struct request *rq, struct bio *bio,
unsigned int nbytes, int error)
{
- request_queue_t *q = rq->q;
+ struct request_queue *q = rq->q;
bio_end_io_t *endio;
void *private;
* blk_queue_bounce_limit to have lower memory pages allocated as bounce
* buffers for doing I/O to pages residing above @page.
**/
-void blk_queue_bounce_limit(request_queue_t *q, u64 dma_addr)
+void blk_queue_bounce_limit(struct request_queue *q, u64 dma_addr)
{
unsigned long bounce_pfn = dma_addr >> PAGE_SHIFT;
int dma = 0;
* Enables a low level driver to set an upper limit on the size of
* received requests.
**/
-void blk_queue_max_sectors(request_queue_t *q, unsigned int max_sectors)
+void blk_queue_max_sectors(struct request_queue *q, unsigned int max_sectors)
{
if ((max_sectors << 9) < PAGE_CACHE_SIZE) {
max_sectors = 1 << (PAGE_CACHE_SHIFT - 9);
* physical data segments in a request. This would be the largest sized
* scatter list the driver could handle.
**/
-void blk_queue_max_phys_segments(request_queue_t *q, unsigned short max_segments)
+void blk_queue_max_phys_segments(struct request_queue *q,
+ unsigned short max_segments)
{
if (!max_segments) {
max_segments = 1;
* address/length pairs the host adapter can actually give as once
* to the device.
**/
-void blk_queue_max_hw_segments(request_queue_t *q, unsigned short max_segments)
+void blk_queue_max_hw_segments(struct request_queue *q,
+ unsigned short max_segments)
{
if (!max_segments) {
max_segments = 1;
* Enables a low level driver to set an upper limit on the size of a
* coalesced segment
**/
-void blk_queue_max_segment_size(request_queue_t *q, unsigned int max_size)
+void blk_queue_max_segment_size(struct request_queue *q, unsigned int max_size)
{
if (max_size < PAGE_CACHE_SIZE) {
max_size = PAGE_CACHE_SIZE;
* even internal read-modify-write operations). Usually the default
* of 512 covers most hardware.
**/
-void blk_queue_hardsect_size(request_queue_t *q, unsigned short size)
+void blk_queue_hardsect_size(struct request_queue *q, unsigned short size)
{
q->hardsect_size = size;
}
* @t: the stacking driver (top)
* @b: the underlying device (bottom)
**/
-void blk_queue_stack_limits(request_queue_t *t, request_queue_t *b)
+void blk_queue_stack_limits(struct request_queue *t, struct request_queue *b)
{
/* zero is "infinity" */
t->max_sectors = min_not_zero(t->max_sectors,b->max_sectors);
* @q: the request queue for the device
* @mask: the memory boundary mask
**/
-void blk_queue_segment_boundary(request_queue_t *q, unsigned long mask)
+void blk_queue_segment_boundary(struct request_queue *q, unsigned long mask)
{
if (mask < PAGE_CACHE_SIZE - 1) {
mask = PAGE_CACHE_SIZE - 1;
* this is used when buiding direct io requests for the queue.
*
**/
-void blk_queue_dma_alignment(request_queue_t *q, int mask)
+void blk_queue_dma_alignment(struct request_queue *q, int mask)
{
q->dma_alignment = mask;
}
*
* no locks need be held.
**/
-struct request *blk_queue_find_tag(request_queue_t *q, int tag)
+struct request *blk_queue_find_tag(struct request_queue *q, int tag)
{
return blk_map_queue_find_tag(q->queue_tags, tag);
}
* blk_cleanup_queue() will take care of calling this function, if tagging
* has been used. So there's no need to call this directly.
**/
-static void __blk_queue_free_tags(request_queue_t *q)
+static void __blk_queue_free_tags(struct request_queue *q)
{
struct blk_queue_tag *bqt = q->queue_tags;
* This is used to disabled tagged queuing to a device, yet leave
* queue in function.
**/
-void blk_queue_free_tags(request_queue_t *q)
+void blk_queue_free_tags(struct request_queue *q)
{
clear_bit(QUEUE_FLAG_QUEUED, &q->queue_flags);
}
EXPORT_SYMBOL(blk_queue_free_tags);
static int
-init_tag_map(request_queue_t *q, struct blk_queue_tag *tags, int depth)
+init_tag_map(struct request_queue *q, struct blk_queue_tag *tags, int depth)
{
struct request **tag_index;
unsigned long *tag_map;
* @depth: the maximum queue depth supported
* @tags: the tag to use
**/
-int blk_queue_init_tags(request_queue_t *q, int depth,
+int blk_queue_init_tags(struct request_queue *q, int depth,
struct blk_queue_tag *tags)
{
int rc;
* Notes:
* Must be called with the queue lock held.
**/
-int blk_queue_resize_tags(request_queue_t *q, int new_depth)
+int blk_queue_resize_tags(struct request_queue *q, int new_depth)
{
struct blk_queue_tag *bqt = q->queue_tags;
struct request **tag_index;
* Notes:
* queue lock must be held.
**/
-void blk_queue_end_tag(request_queue_t *q, struct request *rq)
+void blk_queue_end_tag(struct request_queue *q, struct request *rq)
{
struct blk_queue_tag *bqt = q->queue_tags;
int tag = rq->tag;
* Notes:
* queue lock must be held.
**/
-int blk_queue_start_tag(request_queue_t *q, struct request *rq)
+int blk_queue_start_tag(struct request_queue *q, struct request *rq)
{
struct blk_queue_tag *bqt = q->queue_tags;
int tag;
* Notes:
* queue lock must be held.
**/
-void blk_queue_invalidate_tags(request_queue_t *q)
+void blk_queue_invalidate_tags(struct request_queue *q)
{
struct blk_queue_tag *bqt = q->queue_tags;
struct list_head *tmp, *n;
EXPORT_SYMBOL(blk_dump_rq_flags);
-void blk_recount_segments(request_queue_t *q, struct bio *bio)
+void blk_recount_segments(struct request_queue *q, struct bio *bio)
{
struct bio_vec *bv, *bvprv = NULL;
int i, nr_phys_segs, nr_hw_segs, seg_size, hw_seg_size, cluster;
}
EXPORT_SYMBOL(blk_recount_segments);
-static int blk_phys_contig_segment(request_queue_t *q, struct bio *bio,
+static int blk_phys_contig_segment(struct request_queue *q, struct bio *bio,
struct bio *nxt)
{
if (!(q->queue_flags & (1 << QUEUE_FLAG_CLUSTER)))
return 0;
}
-static int blk_hw_contig_segment(request_queue_t *q, struct bio *bio,
+static int blk_hw_contig_segment(struct request_queue *q, struct bio *bio,
struct bio *nxt)
{
if (unlikely(!bio_flagged(bio, BIO_SEG_VALID)))
* map a request to scatterlist, return number of sg entries setup. Caller
* must make sure sg can hold rq->nr_phys_segments entries
*/
-int blk_rq_map_sg(request_queue_t *q, struct request *rq, struct scatterlist *sg)
+int blk_rq_map_sg(struct request_queue *q, struct request *rq,
+ struct scatterlist *sg)
{
struct bio_vec *bvec, *bvprv;
struct bio *bio;
* specific ones if so desired
*/
-static inline int ll_new_mergeable(request_queue_t *q,
+static inline int ll_new_mergeable(struct request_queue *q,
struct request *req,
struct bio *bio)
{
return 1;
}
-static inline int ll_new_hw_segment(request_queue_t *q,
+static inline int ll_new_hw_segment(struct request_queue *q,
struct request *req,
struct bio *bio)
{
return 1;
}
-int ll_back_merge_fn(request_queue_t *q, struct request *req, struct bio *bio)
+int ll_back_merge_fn(struct request_queue *q, struct request *req, struct bio *bio)
{
unsigned short max_sectors;
int len;
}
EXPORT_SYMBOL(ll_back_merge_fn);
-static int ll_front_merge_fn(request_queue_t *q, struct request *req,
+static int ll_front_merge_fn(struct request_queue *q, struct request *req,
struct bio *bio)
{
unsigned short max_sectors;
return ll_new_hw_segment(q, req, bio);
}
-static int ll_merge_requests_fn(request_queue_t *q, struct request *req,
+static int ll_merge_requests_fn(struct request_queue *q, struct request *req,
struct request *next)
{
int total_phys_segments;
* This is called with interrupts off and no requests on the queue and
* with the queue lock held.
*/
-void blk_plug_device(request_queue_t *q)
+void blk_plug_device(struct request_queue *q)
{
WARN_ON(!irqs_disabled());
* remove the queue from the plugged list, if present. called with
* queue lock held and interrupts disabled.
*/
-int blk_remove_plug(request_queue_t *q)
+int blk_remove_plug(struct request_queue *q)
{
WARN_ON(!irqs_disabled());
/*
* remove the plug and let it rip..
*/
-void __generic_unplug_device(request_queue_t *q)
+void __generic_unplug_device(struct request_queue *q)
{
if (unlikely(blk_queue_stopped(q)))
return;
/**
* generic_unplug_device - fire a request queue
- * @q: The &request_queue_t in question
+ * @q: The &struct request_queue in question
*
* Description:
* Linux uses plugging to build bigger requests queues before letting
* gets unplugged, the request_fn defined for the queue is invoked and
* transfers started.
**/
-void generic_unplug_device(request_queue_t *q)
+void generic_unplug_device(struct request_queue *q)
{
spin_lock_irq(q->queue_lock);
__generic_unplug_device(q);
static void blk_backing_dev_unplug(struct backing_dev_info *bdi,
struct page *page)
{
- request_queue_t *q = bdi->unplug_io_data;
+ struct request_queue *q = bdi->unplug_io_data;
/*
* devices don't necessarily have an ->unplug_fn defined
static void blk_unplug_work(struct work_struct *work)
{
- request_queue_t *q = container_of(work, request_queue_t, unplug_work);
+ struct request_queue *q =
+ container_of(work, struct request_queue, unplug_work);
blk_add_trace_pdu_int(q, BLK_TA_UNPLUG_IO, NULL,
q->rq.count[READ] + q->rq.count[WRITE]);
static void blk_unplug_timeout(unsigned long data)
{
- request_queue_t *q = (request_queue_t *)data;
+ struct request_queue *q = (struct request_queue *)data;
blk_add_trace_pdu_int(q, BLK_TA_UNPLUG_TIMER, NULL,
q->rq.count[READ] + q->rq.count[WRITE]);
/**
* blk_start_queue - restart a previously stopped queue
- * @q: The &request_queue_t in question
+ * @q: The &struct request_queue in question
*
* Description:
* blk_start_queue() will clear the stop flag on the queue, and call
* the request_fn for the queue if it was in a stopped state when
* entered. Also see blk_stop_queue(). Queue lock must be held.
**/
-void blk_start_queue(request_queue_t *q)
+void blk_start_queue(struct request_queue *q)
{
WARN_ON(!irqs_disabled());
/**
* blk_stop_queue - stop a queue
- * @q: The &request_queue_t in question
+ * @q: The &struct request_queue in question
*
* Description:
* The Linux block layer assumes that a block driver will consume all
* the driver has signalled it's ready to go again. This happens by calling
* blk_start_queue() to restart queue operations. Queue lock must be held.
**/
-void blk_stop_queue(request_queue_t *q)
+void blk_stop_queue(struct request_queue *q)
{
blk_remove_plug(q);
set_bit(QUEUE_FLAG_STOPPED, &q->queue_flags);
EXPORT_SYMBOL(blk_run_queue);
/**
- * blk_cleanup_queue: - release a &request_queue_t when it is no longer needed
+ * blk_cleanup_queue: - release a &struct request_queue when it is no longer needed
* @kobj: the kobj belonging of the request queue to be released
*
* Description:
**/
static void blk_release_queue(struct kobject *kobj)
{
- request_queue_t *q = container_of(kobj, struct request_queue, kobj);
+ struct request_queue *q =
+ container_of(kobj, struct request_queue, kobj);
struct request_list *rl = &q->rq;
blk_sync_queue(q);
kmem_cache_free(requestq_cachep, q);
}
-void blk_put_queue(request_queue_t *q)
+void blk_put_queue(struct request_queue *q)
{
kobject_put(&q->kobj);
}
EXPORT_SYMBOL(blk_put_queue);
-void blk_cleanup_queue(request_queue_t * q)
+void blk_cleanup_queue(struct request_queue * q)
{
mutex_lock(&q->sysfs_lock);
set_bit(QUEUE_FLAG_DEAD, &q->queue_flags);
EXPORT_SYMBOL(blk_cleanup_queue);
-static int blk_init_free_list(request_queue_t *q)
+static int blk_init_free_list(struct request_queue *q)
{
struct request_list *rl = &q->rq;
return 0;
}
-request_queue_t *blk_alloc_queue(gfp_t gfp_mask)
+struct request_queue *blk_alloc_queue(gfp_t gfp_mask)
{
return blk_alloc_queue_node(gfp_mask, -1);
}
static struct kobj_type queue_ktype;
-request_queue_t *blk_alloc_queue_node(gfp_t gfp_mask, int node_id)
+struct request_queue *blk_alloc_queue_node(gfp_t gfp_mask, int node_id)
{
- request_queue_t *q;
+ struct request_queue *q;
q = kmem_cache_alloc_node(requestq_cachep,
gfp_mask | __GFP_ZERO, node_id);
* when the block device is deactivated (such as at module unload).
**/
-request_queue_t *blk_init_queue(request_fn_proc *rfn, spinlock_t *lock)
+struct request_queue *blk_init_queue(request_fn_proc *rfn, spinlock_t *lock)
{
return blk_init_queue_node(rfn, lock, -1);
}
EXPORT_SYMBOL(blk_init_queue);
-request_queue_t *
+struct request_queue *
blk_init_queue_node(request_fn_proc *rfn, spinlock_t *lock, int node_id)
{
- request_queue_t *q = blk_alloc_queue_node(GFP_KERNEL, node_id);
+ struct request_queue *q = blk_alloc_queue_node(GFP_KERNEL, node_id);
if (!q)
return NULL;
}
EXPORT_SYMBOL(blk_init_queue_node);
-int blk_get_queue(request_queue_t *q)
+int blk_get_queue(struct request_queue *q)
{
if (likely(!test_bit(QUEUE_FLAG_DEAD, &q->queue_flags))) {
kobject_get(&q->kobj);
EXPORT_SYMBOL(blk_get_queue);
-static inline void blk_free_request(request_queue_t *q, struct request *rq)
+static inline void blk_free_request(struct request_queue *q, struct request *rq)
{
if (rq->cmd_flags & REQ_ELVPRIV)
elv_put_request(q, rq);
}
static struct request *
-blk_alloc_request(request_queue_t *q, int rw, int priv, gfp_t gfp_mask)
+blk_alloc_request(struct request_queue *q, int rw, int priv, gfp_t gfp_mask)
{
struct request *rq = mempool_alloc(q->rq.rq_pool, gfp_mask);
* ioc_batching returns true if the ioc is a valid batching request and
* should be given priority access to a request.
*/
-static inline int ioc_batching(request_queue_t *q, struct io_context *ioc)
+static inline int ioc_batching(struct request_queue *q, struct io_context *ioc)
{
if (!ioc)
return 0;
* is the behaviour we want though - once it gets a wakeup it should be given
* a nice run.
*/
-static void ioc_set_batching(request_queue_t *q, struct io_context *ioc)
+static void ioc_set_batching(struct request_queue *q, struct io_context *ioc)
{
if (!ioc || ioc_batching(q, ioc))
return;
ioc->last_waited = jiffies;
}
-static void __freed_request(request_queue_t *q, int rw)
+static void __freed_request(struct request_queue *q, int rw)
{
struct request_list *rl = &q->rq;
* A request has just been released. Account for it, update the full and
* congestion status, wake up any waiters. Called under q->queue_lock.
*/
-static void freed_request(request_queue_t *q, int rw, int priv)
+static void freed_request(struct request_queue *q, int rw, int priv)
{
struct request_list *rl = &q->rq;
* Returns NULL on failure, with queue_lock held.
* Returns !NULL on success, with queue_lock *not held*.
*/
-static struct request *get_request(request_queue_t *q, int rw_flags,
+static struct request *get_request(struct request_queue *q, int rw_flags,
struct bio *bio, gfp_t gfp_mask)
{
struct request *rq = NULL;
*
* Called with q->queue_lock held, and returns with it unlocked.
*/
-static struct request *get_request_wait(request_queue_t *q, int rw_flags,
+static struct request *get_request_wait(struct request_queue *q, int rw_flags,
struct bio *bio)
{
const int rw = rw_flags & 0x01;
return rq;
}
-struct request *blk_get_request(request_queue_t *q, int rw, gfp_t gfp_mask)
+struct request *blk_get_request(struct request_queue *q, int rw, gfp_t gfp_mask)
{
struct request *rq;
*
* The queue lock must be held with interrupts disabled.
*/
-void blk_start_queueing(request_queue_t *q)
+void blk_start_queueing(struct request_queue *q)
{
if (!blk_queue_plugged(q))
q->request_fn(q);
* more, when that condition happens we need to put the request back
* on the queue. Must be called with queue lock held.
*/
-void blk_requeue_request(request_queue_t *q, struct request *rq)
+void blk_requeue_request(struct request_queue *q, struct request *rq)
{
blk_add_trace_rq(q, rq, BLK_TA_REQUEUE);
* of the queue for things like a QUEUE_FULL message from a device, or a
* host that is unable to accept a particular command.
*/
-void blk_insert_request(request_queue_t *q, struct request *rq,
+void blk_insert_request(struct request_queue *q, struct request *rq,
int at_head, void *data)
{
int where = at_head ? ELEVATOR_INSERT_FRONT : ELEVATOR_INSERT_BACK;
return ret;
}
-static int __blk_rq_map_user(request_queue_t *q, struct request *rq,
+static int __blk_rq_map_user(struct request_queue *q, struct request *rq,
void __user *ubuf, unsigned int len)
{
unsigned long uaddr;
* original bio must be passed back in to blk_rq_unmap_user() for proper
* unmapping.
*/
-int blk_rq_map_user(request_queue_t *q, struct request *rq, void __user *ubuf,
- unsigned long len)
+int blk_rq_map_user(struct request_queue *q, struct request *rq,
+ void __user *ubuf, unsigned long len)
{
unsigned long bytes_read = 0;
struct bio *bio = NULL;
* original bio must be passed back in to blk_rq_unmap_user() for proper
* unmapping.
*/
-int blk_rq_map_user_iov(request_queue_t *q, struct request *rq,
+int blk_rq_map_user_iov(struct request_queue *q, struct request *rq,
struct sg_iovec *iov, int iov_count, unsigned int len)
{
struct bio *bio;
* @len: length of user data
* @gfp_mask: memory allocation flags
*/
-int blk_rq_map_kern(request_queue_t *q, struct request *rq, void *kbuf,
+int blk_rq_map_kern(struct request_queue *q, struct request *rq, void *kbuf,
unsigned int len, gfp_t gfp_mask)
{
struct bio *bio;
* Insert a fully prepared request at the back of the io scheduler queue
* for execution. Don't wait for completion.
*/
-void blk_execute_rq_nowait(request_queue_t *q, struct gendisk *bd_disk,
+void blk_execute_rq_nowait(struct request_queue *q, struct gendisk *bd_disk,
struct request *rq, int at_head,
rq_end_io_fn *done)
{
* Insert a fully prepared request at the back of the io scheduler queue
* for execution and wait for completion.
*/
-int blk_execute_rq(request_queue_t *q, struct gendisk *bd_disk,
+int blk_execute_rq(struct request_queue *q, struct gendisk *bd_disk,
struct request *rq, int at_head)
{
DECLARE_COMPLETION_ONSTACK(wait);
*/
int blkdev_issue_flush(struct block_device *bdev, sector_t *error_sector)
{
- request_queue_t *q;
+ struct request_queue *q;
if (bdev->bd_disk == NULL)
return -ENXIO;
* queue lock is held and interrupts disabled, as we muck with the
* request queue list.
*/
-static inline void add_request(request_queue_t * q, struct request * req)
+static inline void add_request(struct request_queue * q, struct request * req)
{
drive_stat_acct(req, req->nr_sectors, 1);
/*
* queue lock must be held
*/
-void __blk_put_request(request_queue_t *q, struct request *req)
+void __blk_put_request(struct request_queue *q, struct request *req)
{
if (unlikely(!q))
return;
void blk_put_request(struct request *req)
{
unsigned long flags;
- request_queue_t *q = req->q;
+ struct request_queue *q = req->q;
/*
* Gee, IDE calls in w/ NULL q. Fix IDE and remove the
/*
* Has to be called with the request spinlock acquired
*/
-static int attempt_merge(request_queue_t *q, struct request *req,
+static int attempt_merge(struct request_queue *q, struct request *req,
struct request *next)
{
if (!rq_mergeable(req) || !rq_mergeable(next))
return 1;
}
-static inline int attempt_back_merge(request_queue_t *q, struct request *rq)
+static inline int attempt_back_merge(struct request_queue *q,
+ struct request *rq)
{
struct request *next = elv_latter_request(q, rq);
return 0;
}
-static inline int attempt_front_merge(request_queue_t *q, struct request *rq)
+static inline int attempt_front_merge(struct request_queue *q,
+ struct request *rq)
{
struct request *prev = elv_former_request(q, rq);
req->start_time = jiffies;
}
-static int __make_request(request_queue_t *q, struct bio *bio)
+static int __make_request(struct request_queue *q, struct bio *bio)
{
struct request *req;
int el_ret, nr_sectors, barrier, err;
*/
static inline void __generic_make_request(struct bio *bio)
{
- request_queue_t *q;
+ struct request_queue *q;
sector_t maxsector;
sector_t old_sector;
int ret, nr_sectors = bio_sectors(bio);
struct bio *bio, *prevbio = NULL;
int nr_phys_segs, nr_hw_segs;
unsigned int phys_size, hw_size;
- request_queue_t *q = rq->q;
+ struct request_queue *q = rq->q;
if (!rq->bio)
return;
EXPORT_SYMBOL(end_request);
-void blk_rq_bio_prep(request_queue_t *q, struct request *rq, struct bio *bio)
+void blk_rq_bio_prep(struct request_queue *q, struct request *rq,
+ struct bio *bio)
{
/* first two bits are identical in rq->cmd_flags and bio->bi_rw */
rq->cmd_flags |= (bio->bi_rw & 3);
sizeof(struct request), 0, SLAB_PANIC, NULL);
requestq_cachep = kmem_cache_create("blkdev_queue",
- sizeof(request_queue_t), 0, SLAB_PANIC, NULL);
+ sizeof(struct request_queue), 0, SLAB_PANIC, NULL);
iocontext_cachep = kmem_cache_create("blkdev_ioc",
sizeof(struct io_context), 0, SLAB_PANIC, NULL);
queue_attr_show(struct kobject *kobj, struct attribute *attr, char *page)
{
struct queue_sysfs_entry *entry = to_queue(attr);
- request_queue_t *q = container_of(kobj, struct request_queue, kobj);
+ struct request_queue *q =
+ container_of(kobj, struct request_queue, kobj);
ssize_t res;
if (!entry->show)
const char *page, size_t length)
{
struct queue_sysfs_entry *entry = to_queue(attr);
- request_queue_t *q = container_of(kobj, struct request_queue, kobj);
+ struct request_queue *q = container_of(kobj, struct request_queue, kobj);
ssize_t res;
{
int ret;
- request_queue_t *q = disk->queue;
+ struct request_queue *q = disk->queue;
if (!q || !q->request_fn)
return -ENXIO;
void blk_unregister_queue(struct gendisk *disk)
{
- request_queue_t *q = disk->queue;
+ struct request_queue *q = disk->queue;
if (q && q->request_fn) {
elv_unregister_queue(q);
struct list_head queue;
};
-static void noop_merged_requests(request_queue_t *q, struct request *rq,
+static void noop_merged_requests(struct request_queue *q, struct request *rq,
struct request *next)
{
list_del_init(&next->queuelist);
}
-static int noop_dispatch(request_queue_t *q, int force)
+static int noop_dispatch(struct request_queue *q, int force)
{
struct noop_data *nd = q->elevator->elevator_data;
return 0;
}
-static void noop_add_request(request_queue_t *q, struct request *rq)
+static void noop_add_request(struct request_queue *q, struct request *rq)
{
struct noop_data *nd = q->elevator->elevator_data;
list_add_tail(&rq->queuelist, &nd->queue);
}
-static int noop_queue_empty(request_queue_t *q)
+static int noop_queue_empty(struct request_queue *q)
{
struct noop_data *nd = q->elevator->elevator_data;
}
static struct request *
-noop_former_request(request_queue_t *q, struct request *rq)
+noop_former_request(struct request_queue *q, struct request *rq)
{
struct noop_data *nd = q->elevator->elevator_data;
}
static struct request *
-noop_latter_request(request_queue_t *q, struct request *rq)
+noop_latter_request(struct request_queue *q, struct request *rq)
{
struct noop_data *nd = q->elevator->elevator_data;
return list_entry(rq->queuelist.next, struct request, queuelist);
}
-static void *noop_init_queue(request_queue_t *q)
+static void *noop_init_queue(struct request_queue *q)
{
struct noop_data *nd;
return put_user(sg_version_num, p);
}
-static int scsi_get_idlun(request_queue_t *q, int __user *p)
+static int scsi_get_idlun(struct request_queue *q, int __user *p)
{
return put_user(0, p);
}
-static int scsi_get_bus(request_queue_t *q, int __user *p)
+static int scsi_get_bus(struct request_queue *q, int __user *p)
{
return put_user(0, p);
}
-static int sg_get_timeout(request_queue_t *q)
+static int sg_get_timeout(struct request_queue *q)
{
return q->sg_timeout / (HZ / USER_HZ);
}
-static int sg_set_timeout(request_queue_t *q, int __user *p)
+static int sg_set_timeout(struct request_queue *q, int __user *p)
{
int timeout, err = get_user(timeout, p);
return err;
}
-static int sg_get_reserved_size(request_queue_t *q, int __user *p)
+static int sg_get_reserved_size(struct request_queue *q, int __user *p)
{
unsigned val = min(q->sg_reserved_size, q->max_sectors << 9);
return put_user(val, p);
}
-static int sg_set_reserved_size(request_queue_t *q, int __user *p)
+static int sg_set_reserved_size(struct request_queue *q, int __user *p)
{
int size, err = get_user(size, p);
* will always return that we are ATAPI even for a real SCSI drive, I'm not
* so sure this is worth doing anything about (why would you care??)
*/
-static int sg_emulated_host(request_queue_t *q, int __user *p)
+static int sg_emulated_host(struct request_queue *q, int __user *p)
{
return put_user(1, p);
}
}
EXPORT_SYMBOL_GPL(blk_verify_command);
-static int blk_fill_sghdr_rq(request_queue_t *q, struct request *rq,
+static int blk_fill_sghdr_rq(struct request_queue *q, struct request *rq,
struct sg_io_hdr *hdr, int has_write_perm)
{
memset(rq->cmd, 0, BLK_MAX_CDB); /* ATAPI hates garbage after CDB */
return r;
}
-static int sg_io(struct file *file, request_queue_t *q,
+static int sg_io(struct file *file, struct request_queue *q,
struct gendisk *bd_disk, struct sg_io_hdr *hdr)
{
unsigned long start_time;
EXPORT_SYMBOL_GPL(sg_scsi_ioctl);
/* Send basic block requests */
-static int __blk_send_generic(request_queue_t *q, struct gendisk *bd_disk, int cmd, int data)
+static int __blk_send_generic(struct request_queue *q, struct gendisk *bd_disk,
+ int cmd, int data)
{
struct request *rq;
int err;
return err;
}
-static inline int blk_send_start_stop(request_queue_t *q, struct gendisk *bd_disk, int data)
+static inline int blk_send_start_stop(struct request_queue *q,
+ struct gendisk *bd_disk, int data)
{
return __blk_send_generic(q, bd_disk, GPCMD_START_STOP_UNIT, data);
}
static void config_types(void);
static int floppy_open(struct inode *inode, struct file *filp);
static int floppy_release(struct inode *inode, struct file *filp);
-static void do_fd_request(request_queue_t *);
+static void do_fd_request(struct request_queue *);
/************************* End of Prototypes **************************/
}
}
-static void do_fd_request(request_queue_t* q)
+static void do_fd_request(struct request_queue* q)
{
unsigned long flags;
DBG("mfm_request: Dropping out bottom\n");
}
-static void do_mfm_request(request_queue_t *q)
+static void do_mfm_request(struct request_queue *q)
{
DBG("do_mfm_request: about to mfm_request\n");
mfm_request();
if ACPI
-config ACPI_SLEEP
- bool "Sleep States"
- depends on X86 && (!SMP || SUSPEND_SMP)
- default y
- ---help---
- This option adds support for ACPI suspend states.
-
- With this option, you will be able to put the system "to sleep".
- Sleep states are low power states for the system and devices. All
- of the system operating state is saved to either memory or disk
- (depending on the state), to allow the system to resume operation
- quickly at your request.
-
- Although this option sounds really nifty, barely any of the device
- drivers have been converted to the new driver model and hence few
- have proper power management support.
-
- This option is not recommended for anyone except those doing driver
- power management development.
-
-config ACPI_SLEEP_PROC_FS
- bool
- depends on ACPI_SLEEP && PROC_FS
- default y
-
-config ACPI_SLEEP_PROC_SLEEP
- bool "/proc/acpi/sleep (deprecated)"
- depends on ACPI_SLEEP_PROC_FS
- default n
- ---help---
- Create /proc/acpi/sleep
- Deprecated by /sys/power/state
-
config ACPI_PROCFS
- bool "Procfs interface (deprecated)"
- default y
+ bool "Deprecated /proc/acpi files"
+ depends on PROC_FS
---help---
- The Procfs interface for ACPI is made optional for backward compatibility.
- As the same functions are duplicated in the sysfs interface
- and this proc interface will be removed some time later,
- it's marked as deprecated.
- ( /proc/acpi/debug_layer && debug_level are deprecated by
- /sys/module/acpi/parameters/debug_layer && debug_level.
- /proc/acpi/info is deprecated by
- /sys/module/acpi/parameters/acpica_version )
+ For backwards compatibility, this option allows
+ depricated /proc/acpi/ files to exist, even when
+ they have been replaced by functions in /sys.
+ The deprecated files (and their replacements) include:
+
+ /proc/acpi/sleep (/sys/power/state)
+ /proc/acpi/info (/sys/modules/acpi/parameters/acpica_version)
+ /proc/acpi/dsdt (/sys/firmware/acpi/tables/DSDT)
+ /proc/acpi/fadt (/sys/firmware/acpi/tables/FACP)
+ /proc/acpi/debug_layer (/sys/module/acpi/parameters/debug_layer)
+ /proc/acpi/debug_level (/sys/module/acpi/parameters/debug_level)
+
+ This option has no effect on /proc/acpi/ files
+ and functions which do not yet exist in /sys.
+
+ Say N to delete /proc/acpi/ files that have moved to /sys/
config ACPI_AC
tristate "AC Adapter"
#define ACPI_AC_COMPONENT 0x00020000
#define ACPI_AC_CLASS "ac_adapter"
-#define ACPI_AC_HID "ACPI0003"
#define ACPI_AC_DEVICE_NAME "AC Adapter"
#define ACPI_AC_FILE_STATE "state"
#define ACPI_AC_NOTIFY_STATUS 0x80
static int acpi_ac_remove(struct acpi_device *device, int type);
static int acpi_ac_open_fs(struct inode *inode, struct file *file);
+const static struct acpi_device_id ac_device_ids[] = {
+ {"ACPI0003", 0},
+ {"", 0},
+};
+MODULE_DEVICE_TABLE(acpi, ac_device_ids);
+
static struct acpi_driver acpi_ac_driver = {
.name = "ac",
.class = ACPI_AC_CLASS,
- .ids = ACPI_AC_HID,
+ .ids = ac_device_ids,
.ops = {
.add = acpi_ac_add,
.remove = acpi_ac_remove,
static int acpi_memory_device_remove(struct acpi_device *device, int type);
static int acpi_memory_device_start(struct acpi_device *device);
+static const struct acpi_device_id memory_device_ids[] = {
+ {ACPI_MEMORY_DEVICE_HID, 0},
+ {"", 0},
+};
+MODULE_DEVICE_TABLE(acpi, memory_device_ids);
+
static struct acpi_driver acpi_memory_device_driver = {
.name = "acpi_memhotplug",
.class = ACPI_MEMORY_DEVICE_CLASS,
- .ids = ACPI_MEMORY_DEVICE_HID,
+ .ids = memory_device_ids,
.ops = {
.add = acpi_memory_device_add,
.remove = acpi_memory_device_remove,
#define ACPI_HOTK_NAME "Asus Laptop ACPI Extras Driver"
#define ACPI_HOTK_CLASS "hotkey"
#define ACPI_HOTK_DEVICE_NAME "Hotkey"
-#define ACPI_HOTK_HID "ATK0100"
/*
* Some events we use, same for all Asus
static struct asus_hotk *hotk;
/*
- * The hotkey driver declaration
+ * The hotkey driver and autoloading declaration
*/
static int asus_hotk_add(struct acpi_device *device);
static int asus_hotk_remove(struct acpi_device *device, int type);
+static const struct acpi_device_id asus_device_ids[] = {
+ {"ATK0100", 0},
+ {"", 0},
+};
+MODULE_DEVICE_TABLE(acpi, asus_device_ids);
+
static struct acpi_driver asus_hotk_driver = {
.name = "asus_acpi",
.class = ACPI_HOTK_CLASS,
- .ids = ACPI_HOTK_HID,
+ .ids = asus_device_ids,
.ops = {
.add = asus_hotk_add,
.remove = asus_hotk_remove,
#define ACPI_BATTERY_COMPONENT 0x00040000
#define ACPI_BATTERY_CLASS "battery"
-#define ACPI_BATTERY_HID "PNP0C0A"
#define ACPI_BATTERY_DEVICE_NAME "Battery"
#define ACPI_BATTERY_NOTIFY_STATUS 0x80
#define ACPI_BATTERY_NOTIFY_INFO 0x81
static int acpi_battery_remove(struct acpi_device *device, int type);
static int acpi_battery_resume(struct acpi_device *device);
+static const struct acpi_device_id battery_device_ids[] = {
+ {"PNP0C0A", 0},
+ {"", 0},
+};
+MODULE_DEVICE_TABLE(acpi, battery_device_ids);
+
static struct acpi_driver acpi_battery_driver = {
.name = "battery",
.class = ACPI_BATTERY_CLASS,
- .ids = ACPI_BATTERY_HID,
+ .ids = battery_device_ids,
.ops = {
.add = acpi_battery_add,
.resume = acpi_battery_resume,
MODULE_DESCRIPTION("ACPI Button Driver");
MODULE_LICENSE("GPL");
+static const struct acpi_device_id button_device_ids[] = {
+ {ACPI_BUTTON_HID_LID, 0},
+ {ACPI_BUTTON_HID_SLEEP, 0},
+ {ACPI_BUTTON_HID_SLEEPF, 0},
+ {ACPI_BUTTON_HID_POWER, 0},
+ {ACPI_BUTTON_HID_POWERF, 0},
+ {"", 0},
+};
+MODULE_DEVICE_TABLE(acpi, button_device_ids);
+
static int acpi_button_add(struct acpi_device *device);
static int acpi_button_remove(struct acpi_device *device, int type);
static int acpi_button_info_open_fs(struct inode *inode, struct file *file);
static struct acpi_driver acpi_button_driver = {
.name = "button",
.class = ACPI_BUTTON_CLASS,
- .ids = "button_power,button_sleep,PNP0C0D,PNP0C0C,PNP0C0E",
+ .ids = button_device_ids,
.ops = {
.add = acpi_button_add,
.remove = acpi_button_remove,
static int acpi_container_add(struct acpi_device *device);
static int acpi_container_remove(struct acpi_device *device, int type);
+static const struct acpi_device_id container_device_ids[] = {
+ {"ACPI0004", 0},
+ {"PNP0A05", 0},
+ {"PNP0A06", 0},
+ {"", 0},
+};
+MODULE_DEVICE_TABLE(acpi, container_device_ids);
+
static struct acpi_driver acpi_container_driver = {
.name = "container",
.class = ACPI_CONTAINER_CLASS,
- .ids = "ACPI0004,PNP0A05,PNP0A06",
+ .ids = container_device_ids,
.ops = {
.add = acpi_container_add,
.remove = acpi_container_remove,
#include <acpi/actypes.h>
#define ACPI_EC_CLASS "embedded_controller"
-#define ACPI_EC_HID "PNP0C09"
#define ACPI_EC_DEVICE_NAME "Embedded Controller"
#define ACPI_EC_FILE_INFO "info"
static int acpi_ec_stop(struct acpi_device *device, int type);
static int acpi_ec_add(struct acpi_device *device);
+static const struct acpi_device_id ec_device_ids[] = {
+ {"PNP0C09", 0},
+ {"", 0},
+};
+
static struct acpi_driver acpi_ec_driver = {
.name = "ec",
.class = ACPI_EC_CLASS,
- .ids = ACPI_EC_HID,
+ .ids = ec_device_ids,
.ops = {
.add = acpi_ec_add,
.remove = acpi_ec_remove,
static u8 acpi_ev_is_pci_root_bridge(struct acpi_namespace_node *node)
{
acpi_status status;
- struct acpi_device_id hid;
+ struct acpica_device_id hid;
struct acpi_compatible_id_list *cid;
acpi_native_uint i;
static int acpi_fan_suspend(struct acpi_device *device, pm_message_t state);
static int acpi_fan_resume(struct acpi_device *device);
+static const struct acpi_device_id fan_device_ids[] = {
+ {"PNP0C0B", 0},
+ {"", 0},
+};
+MODULE_DEVICE_TABLE(acpi, fan_device_ids);
+
static struct acpi_driver acpi_fan_driver = {
.name = "fan",
.class = ACPI_FAN_CLASS,
- .ids = "PNP0C0B",
+ .ids = fan_device_ids,
.ops = {
.add = acpi_fan_add,
.remove = acpi_fan_remove,
acpi_status status;
struct acpi_namespace_node *node;
u32 flags;
- struct acpi_device_id hid;
+ struct acpica_device_id hid;
struct acpi_compatible_id_list *cid;
acpi_native_uint i;
#define _COMPONENT ACPI_PCI_COMPONENT
ACPI_MODULE_NAME("pci_link");
#define ACPI_PCI_LINK_CLASS "pci_irq_routing"
-#define ACPI_PCI_LINK_HID "PNP0C0F"
#define ACPI_PCI_LINK_DEVICE_NAME "PCI Interrupt Link"
#define ACPI_PCI_LINK_FILE_INFO "info"
#define ACPI_PCI_LINK_FILE_STATUS "state"
static int acpi_pci_link_add(struct acpi_device *device);
static int acpi_pci_link_remove(struct acpi_device *device, int type);
+static struct acpi_device_id link_device_ids[] = {
+ {"PNP0C0F", 0},
+ {"", 0},
+};
+MODULE_DEVICE_TABLE(acpi, link_device_ids);
+
static struct acpi_driver acpi_pci_link_driver = {
.name = "pci_link",
.class = ACPI_PCI_LINK_CLASS,
- .ids = ACPI_PCI_LINK_HID,
+ .ids = link_device_ids,
.ops = {
.add = acpi_pci_link_add,
.remove = acpi_pci_link_remove,
#define _COMPONENT ACPI_PCI_COMPONENT
ACPI_MODULE_NAME("pci_root");
#define ACPI_PCI_ROOT_CLASS "pci_bridge"
-#define ACPI_PCI_ROOT_HID "PNP0A03"
#define ACPI_PCI_ROOT_DEVICE_NAME "PCI Root Bridge"
static int acpi_pci_root_add(struct acpi_device *device);
static int acpi_pci_root_remove(struct acpi_device *device, int type);
static int acpi_pci_root_start(struct acpi_device *device);
+static struct acpi_device_id root_device_ids[] = {
+ {"PNP0A03", 0},
+ {"", 0},
+};
+MODULE_DEVICE_TABLE(acpi, root_device_ids);
+
static struct acpi_driver acpi_pci_root_driver = {
.name = "pci_root",
.class = ACPI_PCI_ROOT_CLASS,
- .ids = ACPI_PCI_ROOT_HID,
+ .ids = root_device_ids,
.ops = {
.add = acpi_pci_root_add,
.remove = acpi_pci_root_remove,
static int acpi_power_resume(struct acpi_device *device);
static int acpi_power_open_fs(struct inode *inode, struct file *file);
+static struct acpi_device_id power_device_ids[] = {
+ {ACPI_POWER_HID, 0},
+ {"", 0},
+};
+MODULE_DEVICE_TABLE(acpi, power_device_ids);
+
static struct acpi_driver acpi_power_driver = {
.name = "power",
.class = ACPI_POWER_CLASS,
- .ids = ACPI_POWER_HID,
+ .ids = power_device_ids,
.ops = {
.add = acpi_power_add,
.remove = acpi_power_remove,
extern int acpi_processor_tstate_has_changed(struct acpi_processor *pr);
+static const struct acpi_device_id processor_device_ids[] = {
+ {ACPI_PROCESSOR_HID, 0},
+ {"", 0},
+};
+MODULE_DEVICE_TABLE(acpi, processor_device_ids);
+
static struct acpi_driver acpi_processor_driver = {
.name = "processor",
.class = ACPI_PROCESSOR_CLASS,
- .ids = ACPI_PROCESSOR_HID,
+ .ids = processor_device_ids,
.ops = {
.add = acpi_processor_add,
.remove = acpi_processor_remove,
static int acpi_processor_get_throttling(struct acpi_processor *pr);
int acpi_processor_set_throttling(struct acpi_processor *pr, int state);
+/*
+ * _TPC - Throttling Present Capabilities
+ */
static int acpi_processor_get_platform_limit(struct acpi_processor *pr)
{
acpi_status status = 0;
if (!pr)
return -EINVAL;
status = acpi_evaluate_integer(pr->handle, "_TPC", NULL, &tpc);
- if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
- ACPI_EXCEPTION((AE_INFO, status, "Evaluating _TPC"));
+ if (ACPI_FAILURE(status)) {
+ if (status != AE_NOT_FOUND) {
+ ACPI_EXCEPTION((AE_INFO, status, "Evaluating _TPC"));
+ }
return -ENODEV;
}
pr->throttling_platform_limit = (int)tpc;
return acpi_processor_get_platform_limit(pr);
}
-/* --------------------------------------------------------------------------
- _PTC, _TSS, _TSD support
- -------------------------------------------------------------------------- */
+/*
+ * _PTC - Processor Throttling Control (and status) register location
+ */
static int acpi_processor_get_throttling_control(struct acpi_processor *pr)
{
int result = 0;
status = acpi_evaluate_object(pr->handle, "_PTC", NULL, &buffer);
if (ACPI_FAILURE(status)) {
- ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PTC"));
+ if (status != AE_NOT_FOUND) {
+ ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PTC"));
+ }
return -ENODEV;
}
return result;
}
+
+/*
+ * _TSS - Throttling Supported States
+ */
static int acpi_processor_get_throttling_states(struct acpi_processor *pr)
{
int result = 0;
status = acpi_evaluate_object(pr->handle, "_TSS", NULL, &buffer);
if (ACPI_FAILURE(status)) {
- ACPI_EXCEPTION((AE_INFO, status, "Evaluating _TSS"));
+ if (status != AE_NOT_FOUND) {
+ ACPI_EXCEPTION((AE_INFO, status, "Evaluating _TSS"));
+ }
return -ENODEV;
}
return result;
}
+
+/*
+ * _TSD - T-State Dependencies
+ */
static int acpi_processor_get_tsd(struct acpi_processor *pr)
{
int result = 0;
status = acpi_evaluate_object(pr->handle, "_TSD", NULL, &buffer);
if (ACPI_FAILURE(status)) {
+ if (status != AE_NOT_FOUND) {
+ ACPI_EXCEPTION((AE_INFO, status, "Evaluating _TSD"));
+ }
return -ENODEV;
}
int result = 0;
int step = 0;
int i = 0;
- int no_ptc = 0;
- int no_tss = 0;
- int no_tsd = 0;
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
"pblk_address[0x%08x] duty_offset[%d] duty_width[%d]\n",
if (!pr)
return -EINVAL;
- /* TBD: Support ACPI 2.0 objects */
- no_ptc = acpi_processor_get_throttling_control(pr);
- no_tss = acpi_processor_get_throttling_states(pr);
- no_tsd = acpi_processor_get_tsd(pr);
-
- if (no_ptc || no_tss) {
+ /*
+ * Evaluate _PTC, _TSS and _TPC
+ * They must all be present or none of them can be used.
+ */
+ if (acpi_processor_get_throttling_control(pr) ||
+ acpi_processor_get_throttling_states(pr) ||
+ acpi_processor_get_platform_limit(pr))
+ {
pr->throttling.acpi_processor_get_throttling =
&acpi_processor_get_throttling_fadt;
pr->throttling.acpi_processor_set_throttling =
&acpi_processor_set_throttling_ptc;
}
+ acpi_processor_get_tsd(pr);
+
if (!pr->throttling.address) {
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No throttling register\n"));
return 0;
pr->throttling.state_count - 1);
seq_puts(seq, "states:\n");
- if (acpi_processor_get_throttling == acpi_processor_get_throttling_fadt)
+ if (pr->throttling.acpi_processor_get_throttling ==
+ acpi_processor_get_throttling_fadt) {
for (i = 0; i < pr->throttling.state_count; i++)
seq_printf(seq, " %cT%d: %02d%%\n",
(i == pr->throttling.state ? '*' : ' '), i,
(pr->throttling.states[i].performance ? pr->
throttling.states[i].performance / 10 : 0));
- else
+ } else {
for (i = 0; i < pr->throttling.state_count; i++)
seq_printf(seq, " %cT%d: %02d%%\n",
(i == pr->throttling.state ? '*' : ' '), i,
(int)pr->throttling.states_tss[i].
freqpercentage);
+ }
end:
return 0;
#define ACPI_SBS_CLASS "sbs"
#define ACPI_AC_CLASS "ac_adapter"
#define ACPI_BATTERY_CLASS "battery"
-#define ACPI_SBS_HID "ACPI0002"
#define ACPI_SBS_DEVICE_NAME "Smart Battery System"
#define ACPI_SBS_FILE_INFO "info"
#define ACPI_SBS_FILE_STATE "state"
static int acpi_sbs_remove(struct acpi_device *device, int type);
static int acpi_sbs_resume(struct acpi_device *device);
+static const struct acpi_device_id sbs_device_ids[] = {
+ {"ACPI0001", 0},
+ {"ACPI0005", 0},
+ {"", 0},
+};
+MODULE_DEVICE_TABLE(acpi, sbs_device_ids);
+
static struct acpi_driver acpi_sbs_driver = {
.name = "sbs",
.class = ACPI_SBS_CLASS,
- .ids = "ACPI0001,ACPI0005",
+ .ids = sbs_device_ids,
.ops = {
.add = acpi_sbs_add,
.remove = acpi_sbs_remove,
extern struct acpi_device *acpi_root;
#define ACPI_BUS_CLASS "system_bus"
-#define ACPI_BUS_HID "ACPI_BUS"
+#define ACPI_BUS_HID "LNXSYBUS"
#define ACPI_BUS_DEVICE_NAME "System Bus"
static LIST_HEAD(acpi_device_list);
unsigned int instance_no;
struct list_head node;
};
+
+/*
+ * Creates hid/cid(s) string needed for modalias and uevent
+ * e.g. on a device with hid:IBM0001 and cid:ACPI0001 you get:
+ * char *modalias: "acpi:IBM0001:ACPI0001"
+*/
+int create_modalias(struct acpi_device *acpi_dev, char *modalias, int size){
+
+ int len;
+
+ if (!acpi_dev->flags.hardware_id)
+ return -ENODEV;
+
+ len = snprintf(modalias, size, "acpi:%s:",
+ acpi_dev->pnp.hardware_id);
+ if (len < 0 || len >= size)
+ return -EINVAL;
+ size -= len;
+
+ if (acpi_dev->flags.compatible_ids) {
+ struct acpi_compatible_id_list *cid_list;
+ int i;
+ int count;
+
+ cid_list = acpi_dev->pnp.cid_list;
+ for (i = 0; i < cid_list->count; i++) {
+ count = snprintf(&modalias[len], size, "%s:",
+ cid_list->id[i].value);
+ if (count < 0 || count >= size) {
+ printk(KERN_ERR "acpi: %s cid[%i] exceeds event buffer size",
+ acpi_dev->pnp.device_name, i);
+ break;
+ }
+ len += count;
+ size -= count;
+ }
+ }
+
+ modalias[len] = '\0';
+ return len;
+}
+
+static ssize_t
+acpi_device_modalias_show(struct device *dev, struct device_attribute *attr, char *buf) {
+ struct acpi_device *acpi_dev = to_acpi_device(dev);
+ int len;
+
+ /* Device has no HID and no CID or string is >1024 */
+ len = create_modalias(acpi_dev, buf, 1024);
+ if (len <= 0)
+ return 0;
+ buf[len++] = '\n';
+ return len;
+}
+static DEVICE_ATTR(modalias, 0444, acpi_device_modalias_show, NULL);
+
static int acpi_eject_operation(acpi_handle handle, int lockable)
{
struct acpi_object_list arg_list;
goto end;
}
+ if (dev->flags.hardware_id || dev->flags.compatible_ids){
+ result = device_create_file(&dev->dev, &dev_attr_modalias);
+ if(result)
+ goto end;
+ }
+
/*
* If device has _EJ0, 'eject' file is created that is used to trigger
* hot-removal function from userland.
if (ACPI_SUCCESS(status))
device_remove_file(&dev->dev, &dev_attr_eject);
+ if (dev->flags.hardware_id || dev->flags.compatible_ids)
+ device_remove_file(&dev->dev, &dev_attr_modalias);
+
if(dev->flags.hardware_id)
device_remove_file(&dev->dev, &dev_attr_hid);
if(dev->handle)
/* --------------------------------------------------------------------------
ACPI Bus operations
-------------------------------------------------------------------------- */
+
+int acpi_match_device_ids(struct acpi_device *device,
+ const struct acpi_device_id *ids)
+{
+ const struct acpi_device_id *id;
+
+ if (device->flags.hardware_id) {
+ for (id = ids; id->id[0]; id++) {
+ if (!strcmp((char*)id->id, device->pnp.hardware_id))
+ return 0;
+ }
+ }
+
+ if (device->flags.compatible_ids) {
+ struct acpi_compatible_id_list *cid_list = device->pnp.cid_list;
+ int i;
+
+ for (id = ids; id->id[0]; id++) {
+ /* compare multiple _CID entries against driver ids */
+ for (i = 0; i < cid_list->count; i++) {
+ if (!strcmp((char*)id->id,
+ cid_list->id[i].value))
+ return 0;
+ }
+ }
+ }
+
+ return -ENOENT;
+}
+EXPORT_SYMBOL(acpi_match_device_ids);
+
static void acpi_device_release(struct device *dev)
{
struct acpi_device *acpi_dev = to_acpi_device(dev);
struct acpi_device *acpi_dev = to_acpi_device(dev);
struct acpi_driver *acpi_drv = to_acpi_driver(drv);
- return !acpi_match_ids(acpi_dev, acpi_drv->ids);
+ return !acpi_match_device_ids(acpi_dev, acpi_drv->ids);
}
static int acpi_device_uevent(struct device *dev, char **envp, int num_envp,
- char *buffer, int buffer_size)
+ char *buffer, int buffer_size)
{
struct acpi_device *acpi_dev = to_acpi_device(dev);
- int i = 0, length = 0, ret = 0;
-
- if (acpi_dev->flags.hardware_id)
- ret = add_uevent_var(envp, num_envp, &i,
- buffer, buffer_size, &length,
- "HWID=%s", acpi_dev->pnp.hardware_id);
- if (ret)
- return -ENOMEM;
- if (acpi_dev->flags.compatible_ids) {
- int j;
- struct acpi_compatible_id_list *cid_list;
- cid_list = acpi_dev->pnp.cid_list;
-
- for (j = 0; j < cid_list->count; j++) {
- ret = add_uevent_var(envp, num_envp, &i, buffer,
- buffer_size, &length, "COMPTID=%s",
- cid_list->id[j].value);
- if (ret)
- return -ENOMEM;
- }
+ strcpy(buffer, "MODALIAS=");
+ if (create_modalias(acpi_dev, buffer + 9, buffer_size - 9) > 0) {
+ envp[0] = buffer;
+ envp[1] = NULL;
}
-
- envp[i] = NULL;
return 0;
}
return;
}
-int acpi_match_ids(struct acpi_device *device, char *ids)
-{
- if (device->flags.hardware_id)
- if (strstr(ids, device->pnp.hardware_id))
- return 0;
-
- if (device->flags.compatible_ids) {
- struct acpi_compatible_id_list *cid_list = device->pnp.cid_list;
- int i;
-
- /* compare multiple _CID entries against driver ids */
- for (i = 0; i < cid_list->count; i++) {
- if (strstr(ids, cid_list->id[i].value))
- return 0;
- }
- }
- return -ENOENT;
-}
-
static int acpi_bus_get_perf_flags(struct acpi_device *device)
{
device->performance.state = ACPI_STATE_UNKNOWN;
struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
union acpi_object *package = NULL;
+ struct acpi_device_id button_device_ids[] = {
+ {"PNP0C0D", 0},
+ {"PNP0C0C", 0},
+ {"PNP0C0E", 0},
+ {"", 0},
+ };
+
/* _PRW */
status = acpi_evaluate_object(device->handle, "_PRW", NULL, &buffer);
device->wakeup.flags.valid = 1;
/* Power button, Lid switch always enable wakeup */
- if (!acpi_match_ids(device, "PNP0C0D,PNP0C0C,PNP0C0E"))
+ if (!acpi_match_device_ids(device, button_device_ids))
device->wakeup.flags.run_wake = 1;
end:
obj-y := poweroff.o wakeup.o
-obj-$(CONFIG_ACPI_SLEEP) += main.o
-obj-$(CONFIG_ACPI_SLEEP_PROC_FS) += proc.o
+obj-y += main.o
+obj-$(CONFIG_X86) += proc.o
EXTRA_CFLAGS += $(ACPI_CFLAGS)
static int init_8259A_after_S1;
+extern int acpi_sleep_prepare(u32 acpi_state);
+extern void acpi_power_off(void);
+
+static u32 acpi_target_sleep_state = ACPI_STATE_S0;
+
+/**
+ * acpi_pm_set_target - Set the target system sleep state to the state
+ * associated with given @pm_state, if supported.
+ */
+
+static int acpi_pm_set_target(suspend_state_t pm_state)
+{
+ u32 acpi_state = acpi_suspend_states[pm_state];
+ int error = 0;
+
+ if (sleep_states[acpi_state]) {
+ acpi_target_sleep_state = acpi_state;
+ } else {
+ printk(KERN_ERR "ACPI does not support this state: %d\n",
+ pm_state);
+ error = -ENOSYS;
+ }
+ return error;
+}
+
/**
* acpi_pm_prepare - Do preliminary suspend work.
- * @pm_state: suspend state we're entering.
+ * @pm_state: ignored
*
- * Make sure we support the state. If we do, and we need it, set the
- * firmware waking vector and do arch-specific nastiness to get the
- * wakeup code to the waking vector.
+ * If necessary, set the firmware waking vector and do arch-specific
+ * nastiness to get the wakeup code to the waking vector.
*/
-extern int acpi_sleep_prepare(u32 acpi_state);
-extern void acpi_power_off(void);
-
static int acpi_pm_prepare(suspend_state_t pm_state)
{
- u32 acpi_state = acpi_suspend_states[pm_state];
+ int error = acpi_sleep_prepare(acpi_target_sleep_state);
- if (!sleep_states[acpi_state]) {
- printk("acpi_pm_prepare does not support %d \n", pm_state);
- return -EPERM;
- }
- return acpi_sleep_prepare(acpi_state);
+ if (error)
+ acpi_target_sleep_state = ACPI_STATE_S0;
+
+ return error;
}
/**
* acpi_pm_enter - Actually enter a sleep state.
- * @pm_state: State we're entering.
+ * @pm_state: ignored
*
- * Flush caches and go to sleep. For STR or STD, we have to call
- * arch-specific assembly, which in turn call acpi_enter_sleep_state().
+ * Flush caches and go to sleep. For STR we have to call arch-specific
+ * assembly, which in turn call acpi_enter_sleep_state().
* It's unfortunate, but it works. Please fix if you're feeling frisky.
*/
{
acpi_status status = AE_OK;
unsigned long flags = 0;
- u32 acpi_state = acpi_suspend_states[pm_state];
+ u32 acpi_state = acpi_target_sleep_state;
ACPI_FLUSH_CPU_CACHE();
/* Do arch specific saving of state. */
- if (pm_state > PM_SUSPEND_STANDBY) {
+ if (acpi_state == ACPI_STATE_S3) {
int error = acpi_save_state_mem();
- if (error)
+
+ if (error) {
+ acpi_target_sleep_state = ACPI_STATE_S0;
return error;
+ }
}
local_irq_save(flags);
acpi_enable_wakeup_device(acpi_state);
- switch (pm_state) {
- case PM_SUSPEND_STANDBY:
+ switch (acpi_state) {
+ case ACPI_STATE_S1:
barrier();
status = acpi_enter_sleep_state(acpi_state);
break;
- case PM_SUSPEND_MEM:
+ case ACPI_STATE_S3:
do_suspend_lowlevel();
break;
-
- default:
- return -EINVAL;
}
/* ACPI 3.0 specs (P62) says that it's the responsabilty
local_irq_restore(flags);
printk(KERN_DEBUG "Back to C!\n");
- /* restore processor state
- * We should only be here if we're coming back from STR or STD.
- * And, in the case of the latter, the memory image should have already
- * been loaded from disk.
- */
- if (pm_state > PM_SUSPEND_STANDBY)
+ /* restore processor state */
+ if (acpi_state == ACPI_STATE_S3)
acpi_restore_state_mem();
return ACPI_SUCCESS(status) ? 0 : -EFAULT;
/**
* acpi_pm_finish - Finish up suspend sequence.
- * @pm_state: State we're coming out of.
+ * @pm_state: ignored
*
* This is called after we wake back up (or if entering the sleep state
* failed).
static int acpi_pm_finish(suspend_state_t pm_state)
{
- u32 acpi_state = acpi_suspend_states[pm_state];
+ u32 acpi_state = acpi_target_sleep_state;
acpi_leave_sleep_state(acpi_state);
acpi_disable_wakeup_device(acpi_state);
/* reset firmware waking vector */
acpi_set_firmware_waking_vector((acpi_physical_address) 0);
+ acpi_target_sleep_state = ACPI_STATE_S0;
+
+#ifdef CONFIG_X86
if (init_8259A_after_S1) {
printk("Broken toshiba laptop -> kicking interrupts\n");
init_8259A(0);
}
+#endif
return 0;
}
static struct pm_ops acpi_pm_ops = {
.valid = acpi_pm_state_valid,
+ .set_target = acpi_pm_set_target,
.prepare = acpi_pm_prepare,
.enter = acpi_pm_enter,
.finish = acpi_pm_finish,
};
#endif /* CONFIG_SOFTWARE_SUSPEND */
+/**
+ * acpi_pm_device_sleep_state - return preferred power state of ACPI device
+ * in the system sleep state given by %acpi_target_sleep_state
+ * @dev: device to examine
+ * @wake: if set, the device should be able to wake up the system
+ * @d_min_p: used to store the upper limit of allowed states range
+ * Return value: preferred power state of the device on success, -ENODEV on
+ * failure (ie. if there's no 'struct acpi_device' for @dev)
+ *
+ * Find the lowest power (highest number) ACPI device power state that
+ * device @dev can be in while the system is in the sleep state represented
+ * by %acpi_target_sleep_state. If @wake is nonzero, the device should be
+ * able to wake up the system from this sleep state. If @d_min_p is set,
+ * the highest power (lowest number) device power state of @dev allowed
+ * in this system sleep state is stored at the location pointed to by it.
+ *
+ * The caller must ensure that @dev is valid before using this function.
+ * The caller is also responsible for figuring out if the device is
+ * supposed to be able to wake up the system and passing this information
+ * via @wake.
+ */
+
+int acpi_pm_device_sleep_state(struct device *dev, int wake, int *d_min_p)
+{
+ acpi_handle handle = DEVICE_ACPI_HANDLE(dev);
+ struct acpi_device *adev;
+ char acpi_method[] = "_SxD";
+ unsigned long d_min, d_max;
+
+ if (!handle || ACPI_FAILURE(acpi_bus_get_device(handle, &adev))) {
+ printk(KERN_ERR "ACPI handle has no context!\n");
+ return -ENODEV;
+ }
+
+ acpi_method[2] = '0' + acpi_target_sleep_state;
+ /*
+ * If the sleep state is S0, we will return D3, but if the device has
+ * _S0W, we will use the value from _S0W
+ */
+ d_min = ACPI_STATE_D0;
+ d_max = ACPI_STATE_D3;
+
+ /*
+ * If present, _SxD methods return the minimum D-state (highest power
+ * state) we can use for the corresponding S-states. Otherwise, the
+ * minimum D-state is D0 (ACPI 3.x).
+ *
+ * NOTE: We rely on acpi_evaluate_integer() not clobbering the integer
+ * provided -- that's our fault recovery, we ignore retval.
+ */
+ if (acpi_target_sleep_state > ACPI_STATE_S0)
+ acpi_evaluate_integer(handle, acpi_method, NULL, &d_min);
+
+ /*
+ * If _PRW says we can wake up the system from the target sleep state,
+ * the D-state returned by _SxD is sufficient for that (we assume a
+ * wakeup-aware driver if wake is set). Still, if _SxW exists
+ * (ACPI 3.x), it should return the maximum (lowest power) D-state that
+ * can wake the system. _S0W may be valid, too.
+ */
+ if (acpi_target_sleep_state == ACPI_STATE_S0 ||
+ (wake && adev->wakeup.state.enabled &&
+ adev->wakeup.sleep_state <= acpi_target_sleep_state)) {
+ acpi_method[3] = 'W';
+ acpi_evaluate_integer(handle, acpi_method, NULL, &d_max);
+ /* Sanity check */
+ if (d_max < d_min)
+ d_min = d_max;
+ }
+
+ if (d_min_p)
+ *d_min_p = d_min;
+ return d_max;
+}
+
/*
* Toshiba fails to preserve interrupts over S1, reinitialization
* of 8259 is needed after S1 resume.
int acpi_sleep_prepare(u32 acpi_state)
{
-#ifdef CONFIG_ACPI_SLEEP
/* do we have a wakeup address for S2 and S3? */
if (acpi_state == ACPI_STATE_S3) {
if (!acpi_wakeup_address) {
}
ACPI_FLUSH_CPU_CACHE();
acpi_enable_wakeup_device_prep(acpi_state);
-#endif
acpi_gpe_sleep_prepare(acpi_state);
acpi_enter_sleep_state_prep(acpi_state);
return 0;
#include "sleep.h"
#define _COMPONENT ACPI_SYSTEM_COMPONENT
+
+/*
+ * this file provides support for:
+ * /proc/acpi/sleep
+ * /proc/acpi/alarm
+ * /proc/acpi/wakeup
+ */
+
ACPI_MODULE_NAME("sleep")
-#ifdef CONFIG_ACPI_SLEEP_PROC_SLEEP
+#ifdef CONFIG_ACPI_PROCFS
static int acpi_system_sleep_seq_show(struct seq_file *seq, void *offset)
{
int i;
Done:
return error ? error : count;
}
-#endif /* CONFIG_ACPI_SLEEP_PROC_SLEEP */
+#endif /* CONFIG_ACPI_PROCFS */
#if defined(CONFIG_RTC_DRV_CMOS) || defined(CONFIG_RTC_DRV_CMOS_MODULE)
/* use /sys/class/rtc/rtcX/wakealarm instead; it's not ACPI-specific */
.release = single_release,
};
-#ifdef CONFIG_ACPI_SLEEP_PROC_SLEEP
+#ifdef CONFIG_ACPI_PROCFS
static const struct file_operations acpi_system_sleep_fops = {
.open = acpi_system_sleep_open_fs,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
-#endif /* CONFIG_ACPI_SLEEP_PROC_SLEEP */
+#endif /* CONFIG_ACPI_PROCFS */
#ifdef HAVE_ACPI_LEGACY_ALARM
static const struct file_operations acpi_system_alarm_fops = {
if (acpi_disabled)
return 0;
-#ifdef CONFIG_ACPI_SLEEP_PROC_SLEEP
+#ifdef CONFIG_ACPI_PROCFS
/* 'sleep' [R/W] */
entry =
create_proc_entry("sleep", S_IFREG | S_IRUGO | S_IWUSR,
acpi_root_dir);
if (entry)
entry->proc_fops = &acpi_system_sleep_fops;
-#endif
+#endif /* CONFIG_ACPI_PROCFS */
#ifdef HAVE_ACPI_LEGACY_ALARM
/* 'alarm' [R/W] */
extern struct list_head acpi_wakeup_device_list;
extern spinlock_t acpi_device_lock;
-#ifdef CONFIG_ACPI_SLEEP
/**
* acpi_enable_wakeup_device_prep - prepare wakeup devices
* @sleep_state: ACPI state
}
late_initcall(acpi_wakeup_device_init);
-#endif
/*
* Disable all wakeup GPEs before entering requested sleep state.
static ssize_t acpi_thermal_write_polling(struct file *, const char __user *,
size_t, loff_t *);
+static const struct acpi_device_id thermal_device_ids[] = {
+ {ACPI_THERMAL_HID, 0},
+ {"", 0},
+};
+MODULE_DEVICE_TABLE(acpi, thermal_device_ids);
+
static struct acpi_driver acpi_thermal_driver = {
.name = "thermal",
.class = ACPI_THERMAL_CLASS,
- .ids = ACPI_THERMAL_HID,
+ .ids = thermal_device_ids,
.ops = {
.add = acpi_thermal_add,
.remove = acpi_thermal_remove,
acpi_status
acpi_ut_execute_HID(struct acpi_namespace_node *device_node,
- struct acpi_device_id *hid)
+ struct acpica_device_id *hid)
{
union acpi_operand_object *obj_desc;
acpi_status status;
acpi_status
acpi_ut_execute_UID(struct acpi_namespace_node *device_node,
- struct acpi_device_id *uid)
+ struct acpica_device_id *uid)
{
union acpi_operand_object *obj_desc;
acpi_status status;
static int acpi_video_bus_add(struct acpi_device *device);
static int acpi_video_bus_remove(struct acpi_device *device, int type);
+static const struct acpi_device_id video_device_ids[] = {
+ {ACPI_VIDEO_HID, 0},
+ {"", 0},
+};
+MODULE_DEVICE_TABLE(acpi, video_device_ids);
+
static struct acpi_driver acpi_video_bus = {
.name = "video",
.class = ACPI_VIDEO_CLASS,
- .ids = ACPI_VIDEO_HID,
+ .ids = video_device_ids,
.ops = {
.add = acpi_video_bus_add,
.remove = acpi_video_bus_remove,
#include <linux/device.h>
#include <scsi/scsi_host.h>
#include <linux/libata.h>
+#include <linux/dmi.h>
#define DRV_NAME "ata_piix"
#define DRV_VERSION "2.11"
RV = -3, /* reserved */
PIIX_AHCI_DEVICE = 6,
+
+ /* host->flags bits */
+ PIIX_HOST_BROKEN_SUSPEND = (1 << 24),
};
struct piix_map_db {
static void piix_set_dmamode (struct ata_port *ap, struct ata_device *adev);
static void ich_set_dmamode (struct ata_port *ap, struct ata_device *adev);
static int ich_pata_cable_detect(struct ata_port *ap);
+#ifdef CONFIG_PM
+static int piix_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg);
+static int piix_pci_device_resume(struct pci_dev *pdev);
+#endif
static unsigned int in_module_init = 1;
.probe = piix_init_one,
.remove = ata_pci_remove_one,
#ifdef CONFIG_PM
- .suspend = ata_pci_device_suspend,
- .resume = ata_pci_device_resume,
+ .suspend = piix_pci_device_suspend,
+ .resume = piix_pci_device_resume,
#endif
};
do_pata_set_dmamode(ap, adev, 1);
}
+#ifdef CONFIG_PM
+static struct dmi_system_id piix_broken_suspend_dmi_table[] = {
+ {
+ .ident = "TECRA M5",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "TECRA M5"),
+ },
+ },
+ {
+ .ident = "Satellite U200",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "Satellite U200"),
+ },
+ },
+ {
+ .ident = "Satellite U205",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "Satellite U205"),
+ },
+ },
+ {
+ .ident = "Portege M500",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "PORTEGE M500"),
+ },
+ },
+ { }
+};
+
+static int piix_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg)
+{
+ struct ata_host *host = dev_get_drvdata(&pdev->dev);
+ unsigned long flags;
+ int rc = 0;
+
+ rc = ata_host_suspend(host, mesg);
+ if (rc)
+ return rc;
+
+ /* Some braindamaged ACPI suspend implementations expect the
+ * controller to be awake on entry; otherwise, it burns cpu
+ * cycles and power trying to do something to the sleeping
+ * beauty.
+ */
+ if (dmi_check_system(piix_broken_suspend_dmi_table) &&
+ mesg.event == PM_EVENT_SUSPEND) {
+ pci_save_state(pdev);
+
+ /* mark its power state as "unknown", since we don't
+ * know if e.g. the BIOS will change its device state
+ * when we suspend.
+ */
+ if (pdev->current_state == PCI_D0)
+ pdev->current_state = PCI_UNKNOWN;
+
+ /* tell resume that it's waking up from broken suspend */
+ spin_lock_irqsave(&host->lock, flags);
+ host->flags |= PIIX_HOST_BROKEN_SUSPEND;
+ spin_unlock_irqrestore(&host->lock, flags);
+ } else
+ ata_pci_device_do_suspend(pdev, mesg);
+
+ return 0;
+}
+
+static int piix_pci_device_resume(struct pci_dev *pdev)
+{
+ struct ata_host *host = dev_get_drvdata(&pdev->dev);
+ unsigned long flags;
+ int rc;
+
+ if (host->flags & PIIX_HOST_BROKEN_SUSPEND) {
+ spin_lock_irqsave(&host->lock, flags);
+ host->flags &= ~PIIX_HOST_BROKEN_SUSPEND;
+ spin_unlock_irqrestore(&host->lock, flags);
+
+ pci_set_power_state(pdev, PCI_D0);
+ pci_restore_state(pdev);
+
+ /* PCI device wasn't disabled during suspend. Use
+ * __pci_reenable_device() to avoid affecting the
+ * enable count.
+ */
+ rc = __pci_reenable_device(pdev);
+ if (rc)
+ dev_printk(KERN_ERR, &pdev->dev, "failed to enable "
+ "device after resume (%d)\n", rc);
+ } else
+ rc = ata_pci_device_do_resume(pdev);
+
+ if (rc == 0)
+ ata_host_resume(host);
+
+ return rc;
+}
+#endif
+
#define AHCI_PCI_BAR 5
#define AHCI_GLOBAL_CTL 0x04
#define AHCI_ENABLE (1 << 31)
* Decrement max hw segments accordingly.
*/
if (dev->class == ATA_DEV_ATAPI) {
- request_queue_t *q = sdev->request_queue;
+ struct request_queue *q = sdev->request_queue;
blk_queue_max_hw_segments(q, q->max_hw_segments - 1);
}
.ident = "HP Pavilion N5430",
.matches = {
DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"),
- DMI_MATCH(DMI_BOARD_NAME, "OmniBook N32N-736"),
+ DMI_MATCH(DMI_BOARD_VERSION, "OmniBook N32N-736"),
},
},
{ }
#include <linux/libata.h>
#define DRV_NAME "pata_hpt37x"
-#define DRV_VERSION "0.6.6"
+#define DRV_VERSION "0.6.7"
struct hpt_clock {
u8 xfer_speed;
/* Select the DPLL clock. */
pci_write_config_byte(dev, 0x5b, 0x21);
- pci_write_config_dword(dev, 0x5C, (f_high << 16) | f_low);
+ pci_write_config_dword(dev, 0x5C, (f_high << 16) | f_low | 0x100);
for(adjust = 0; adjust < 8; adjust++) {
if (hpt37x_calibrate_dpll(dev))
break;
/* See if it'll settle at a fractionally different clock */
- if ((adjust & 3) == 3) {
- f_low --;
- f_high ++;
- }
- pci_write_config_dword(dev, 0x5C, (f_high << 16) | f_low);
+ if (adjust & 1)
+ f_low -= adjust >> 1;
+ else
+ f_high += adjust >> 1;
+ pci_write_config_dword(dev, 0x5C, (f_high << 16) | f_low | 0x100);
}
if (adjust == 8) {
printk(KERN_WARNING "hpt37x: DPLL did not stabilize.\n");
dev->driver->shutdown(dev);
}
}
-
- sysdev_shutdown();
}
goto repeat;
}
-static void do_fd_request(request_queue_t * q)
+static void do_fd_request(struct request_queue * q)
{
redo_fd_request();
}
u16 maxbcnt;
struct work_struct work;/* disk create work struct */
struct gendisk *gd;
- request_queue_t blkq;
+ struct request_queue blkq;
struct hd_geometry geo;
sector_t ssize;
struct timer_list timer;
}
static int
-aoeblk_make_request(request_queue_t *q, struct bio *bio)
+aoeblk_make_request(struct request_queue *q, struct bio *bio)
{
struct aoedev *d;
struct buf *buf;
}
-void do_fd_request(request_queue_t * q)
+void do_fd_request(struct request_queue * q)
{
unsigned long flags;
static ctlr_info_t *hba[MAX_CTLR];
-static void do_cciss_request(request_queue_t *q);
+static void do_cciss_request(struct request_queue *q);
static irqreturn_t do_cciss_intr(int irq, void *dev_id);
static int cciss_open(struct inode *inode, struct file *filep);
static int cciss_release(struct inode *inode, struct file *filep);
*/
if (h->gendisk[0] != disk) {
if (disk) {
- request_queue_t *q = disk->queue;
+ struct request_queue *q = disk->queue;
if (disk->flags & GENHD_FL_UP)
del_gendisk(disk);
if (q) {
/*
* Get a request and submit it to the controller.
*/
-static void do_cciss_request(request_queue_t *q)
+static void do_cciss_request(struct request_queue *q)
{
ctlr_info_t *h = q->queuedata;
CommandList_struct *c;
do {
drive_info_struct *drv = &(hba[i]->drv[j]);
struct gendisk *disk = hba[i]->gendisk[j];
- request_queue_t *q;
+ struct request_queue *q;
/* Check if the disk was allocated already */
if (!disk){
for (j = 0; j < CISS_MAX_LUN; j++) {
struct gendisk *disk = hba[i]->gendisk[j];
if (disk) {
- request_queue_t *q = disk->queue;
+ struct request_queue *q = disk->queue;
if (disk->flags & GENHD_FL_UP)
del_gendisk(disk);
static int ida_getgeo(struct block_device *bdev, struct hd_geometry *geo);
static int ida_ctlr_ioctl(ctlr_info_t *h, int dsk, ida_ioctl_t *io);
-static void do_ida_request(request_queue_t *q);
+static void do_ida_request(struct request_queue *q);
static void start_io(ctlr_info_t *h);
static inline void addQ(cmdlist_t **Qptr, cmdlist_t *c);
/* pdev is NULL for eisa */
static int __init cpqarray_register_ctlr( int i, struct pci_dev *pdev)
{
- request_queue_t *q;
+ struct request_queue *q;
int j;
/*
* are in here (either via the dummy do_ida_request functions or by being
* called from the interrupt handler
*/
-static void do_ida_request(request_queue_t *q)
+static void do_ida_request(struct request_queue *q)
{
ctlr_info_t *h = q->queuedata;
cmdlist_t *c;
static struct request *current_req;
static struct request_queue *floppy_queue;
-static void do_fd_request(request_queue_t * q);
+static void do_fd_request(struct request_queue * q);
#ifndef fd_get_dma_residue
#define fd_get_dma_residue() get_dma_residue(FLOPPY_DMA)
schedule_bh(redo_fd_request);
}
-static void do_fd_request(request_queue_t * q)
+static void do_fd_request(struct request_queue * q)
{
if (max_buffer_sectors == 0) {
printk("VFS: do_fd_request called on non-open device\n");
-/* A simple block driver for lguest.
+/*D:400
+ * The Guest block driver
*
- * Copyright 2006 Rusty Russell <rusty@rustcorp.com.au> IBM Corporation
+ * This is a simple block driver, which appears as /dev/lgba, lgbb, lgbc etc.
+ * The mechanism is simple: we place the information about the request in the
+ * device page, then use SEND_DMA (containing the data for a write, or an empty
+ * "ping" DMA for a read).
+ :*/
+/* Copyright 2006 Rusty Russell <rusty@rustcorp.com.au> IBM Corporation
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
static char next_block_index = 'a';
+/*D:420 Here is the structure which holds all the information we need about
+ * each Guest block device.
+ *
+ * I'm sure at this stage, you're wondering "hey, where was the adventure I was
+ * promised?" and thinking "Rusty sucks, I shall say nasty things about him on
+ * my blog". I think Real adventures have boring bits, too, and you're in the
+ * middle of one. But it gets better. Just not quite yet. */
struct blockdev
{
+ /* The block queue infrastructure wants a spinlock: it is held while it
+ * calls our block request function. We grab it in our interrupt
+ * handler so the responses don't mess with new requests. */
spinlock_t lock;
- /* The disk structure for the kernel. */
+ /* The disk structure registered with kernel. */
struct gendisk *disk;
- /* The major number for this disk. */
+ /* The major device number for this disk, and the interrupt. We only
+ * really keep them here for completeness; we'd need them if we
+ * supported device unplugging. */
int major;
int irq;
+ /* The physical address of this device's memory page */
unsigned long phys_addr;
- /* The mapped block page. */
+ /* The mapped memory page for convenient acces. */
struct lguest_block_page *lb_page;
- /* We only have a single request outstanding at a time. */
+ /* We only have a single request outstanding at a time: this is it. */
struct lguest_dma dma;
struct request *req;
};
-/* Jens gave me this nice helper to end all chunks of a request. */
+/*D:495 We originally used end_request() throughout the driver, but it turns
+ * out that end_request() is deprecated, and doesn't actually end the request
+ * (which seems like a good reason to deprecate it!). It simply ends the first
+ * bio. So if we had 3 bios in a "struct request" we would do all 3,
+ * end_request(), do 2, end_request(), do 1 and end_request(): twice as much
+ * work as we needed to do.
+ *
+ * This reinforced to me that I do not understand the block layer.
+ *
+ * Nonetheless, Jens Axboe gave me this nice helper to end all chunks of a
+ * request. This improved disk speed by 130%. */
static void end_entire_request(struct request *req, int uptodate)
{
if (end_that_request_first(req, uptodate, req->hard_nr_sectors))
end_that_request_last(req, uptodate);
}
+/* I'm told there are only two stories in the world worth telling: love and
+ * hate. So there used to be a love scene here like this:
+ *
+ * Launcher: We could make beautiful I/O together, you and I.
+ * Guest: My, that's a big disk!
+ *
+ * Unfortunately, it was just too raunchy for our otherwise-gentle tale. */
+
+/*D:490 This is the interrupt handler, called when a block read or write has
+ * been completed for us. */
static irqreturn_t lgb_irq(int irq, void *_bd)
{
+ /* We handed our "struct blockdev" as the argument to request_irq(), so
+ * it is passed through to us here. This tells us which device we're
+ * dealing with in case we have more than one. */
struct blockdev *bd = _bd;
unsigned long flags;
+ /* We weren't doing anything? Strange, but could happen if we shared
+ * interrupts (we don't!). */
if (!bd->req) {
pr_debug("No work!\n");
return IRQ_NONE;
}
+ /* Not done yet? That's equally strange. */
if (!bd->lb_page->result) {
pr_debug("No result!\n");
return IRQ_NONE;
}
+ /* We have to grab the lock before ending the request. */
spin_lock_irqsave(&bd->lock, flags);
+ /* "result" is 1 for success, 2 for failure: end_entire_request() wants
+ * to know whether this succeeded or not. */
end_entire_request(bd->req, bd->lb_page->result == 1);
+ /* Clear out request, it's done. */
bd->req = NULL;
+ /* Reset incoming DMA for next time. */
bd->dma.used_len = 0;
+ /* Ready for more reads or writes */
blk_start_queue(bd->disk->queue);
spin_unlock_irqrestore(&bd->lock, flags);
+
+ /* The interrupt was for us, we dealt with it. */
return IRQ_HANDLED;
}
+/*D:480 The block layer's "struct request" contains a number of "struct bio"s,
+ * each of which contains "struct bio_vec"s, each of which contains a page, an
+ * offset and a length.
+ *
+ * Fortunately there are iterators to help us walk through the "struct
+ * request". Even more fortunately, there were plenty of places to steal the
+ * code from. We pack the "struct request" into our "struct lguest_dma" and
+ * return the total length. */
static unsigned int req_to_dma(struct request *req, struct lguest_dma *dma)
{
unsigned int i = 0, idx, len = 0;
rq_for_each_bio(bio, req) {
struct bio_vec *bvec;
bio_for_each_segment(bvec, bio, idx) {
+ /* We told the block layer not to give us too many. */
BUG_ON(i == LGUEST_MAX_DMA_SECTIONS);
+ /* If we had a zero-length segment, it would look like
+ * the end of the data referred to by the "struct
+ * lguest_dma", so make sure that doesn't happen. */
BUG_ON(!bvec->bv_len);
+ /* Convert page & offset to a physical address */
dma->addr[i] = page_to_phys(bvec->bv_page)
+ bvec->bv_offset;
dma->len[i] = bvec->bv_len;
i++;
}
}
+ /* If the array isn't full, we mark the end with a 0 length */
if (i < LGUEST_MAX_DMA_SECTIONS)
dma->len[i] = 0;
return len;
}
+/* This creates an empty DMA, useful for prodding the Host without sending data
+ * (ie. when we want to do a read) */
static void empty_dma(struct lguest_dma *dma)
{
dma->len[0] = 0;
}
+/*D:470 Setting up a request is fairly easy: */
static void setup_req(struct blockdev *bd,
int type, struct request *req, struct lguest_dma *dma)
{
+ /* The type is 1 (write) or 0 (read). */
bd->lb_page->type = type;
+ /* The sector on disk where the read or write starts. */
bd->lb_page->sector = req->sector;
+ /* The result is initialized to 0 (unfinished). */
bd->lb_page->result = 0;
+ /* The current request (so we can end it in the interrupt handler). */
bd->req = req;
+ /* The number of bytes: returned as a side-effect of req_to_dma(),
+ * which packs the block layer's "struct request" into our "struct
+ * lguest_dma" */
bd->lb_page->bytes = req_to_dma(req, dma);
}
+/*D:450 Write is pretty straightforward: we pack the request into a "struct
+ * lguest_dma", then use SEND_DMA to send the request. */
static void do_write(struct blockdev *bd, struct request *req)
{
struct lguest_dma send;
lguest_send_dma(bd->phys_addr, &send);
}
+/* Read is similar to write, except we pack the request into our receive
+ * "struct lguest_dma" and send through an empty DMA just to tell the Host that
+ * there's a request pending. */
static void do_read(struct blockdev *bd, struct request *req)
{
struct lguest_dma ping;
lguest_send_dma(bd->phys_addr, &ping);
}
-static void do_lgb_request(request_queue_t *q)
+/*D:440 This where requests come in: we get handed the request queue and are
+ * expected to pull a "struct request" off it until we've finished them or
+ * we're waiting for a reply: */
+static void do_lgb_request(struct request_queue *q)
{
struct blockdev *bd;
struct request *req;
again:
+ /* This sometimes returns NULL even on the very first time around. I
+ * wonder if it's something to do with letting elves handle the request
+ * queue... */
req = elv_next_request(q);
if (!req)
return;
+ /* We attached the struct blockdev to the disk: get it back */
bd = req->rq_disk->private_data;
- /* Sometimes we get repeated requests after blk_stop_queue. */
+ /* Sometimes we get repeated requests after blk_stop_queue(), but we
+ * can only handle one at a time. */
if (bd->req)
return;
+ /* We only do reads and writes: no tricky business! */
if (!blk_fs_request(req)) {
pr_debug("Got non-command 0x%08x\n", req->cmd_type);
req->errors++;
else
do_read(bd, req);
- /* Wait for interrupt to tell us it's done. */
+ /* We've put out the request, so stop any more coming in until we get
+ * an interrupt, which takes us to lgb_irq() to re-enable the queue. */
blk_stop_queue(q);
}
+/*D:430 This is the "struct block_device_operations" we attach to the disk at
+ * the end of lguestblk_probe(). It doesn't seem to want much. */
static struct block_device_operations lguestblk_fops = {
.owner = THIS_MODULE,
};
+/*D:425 Setting up a disk device seems to involve a lot of code. I'm not sure
+ * quite why. I do know that the IDE code sent two or three of the maintainers
+ * insane, perhaps this is the fringe of the same disease?
+ *
+ * As in the console code, the probe function gets handed the generic
+ * lguest_device from lguest_bus.c: */
static int lguestblk_probe(struct lguest_device *lgdev)
{
struct blockdev *bd;
int err;
int irqflags = IRQF_SHARED;
+ /* First we allocate our own "struct blockdev" and initialize the easy
+ * fields. */
bd = kmalloc(sizeof(*bd), GFP_KERNEL);
if (!bd)
return -ENOMEM;
bd->req = NULL;
bd->dma.used_len = 0;
bd->dma.len[0] = 0;
+ /* The descriptor in the lguest_devices array provided by the Host
+ * gives the Guest the physical page number of the device's page. */
bd->phys_addr = (lguest_devices[lgdev->index].pfn << PAGE_SHIFT);
+ /* We use lguest_map() to get a pointer to the device page */
bd->lb_page = lguest_map(bd->phys_addr, 1);
if (!bd->lb_page) {
err = -ENOMEM;
goto out_free_bd;
}
+ /* We need a major device number: 0 means "assign one dynamically". */
bd->major = register_blkdev(0, "lguestblk");
if (bd->major < 0) {
err = bd->major;
goto out_unmap;
}
+ /* This allocates a "struct gendisk" where we pack all the information
+ * about the disk which the rest of Linux sees. We ask for one minor
+ * number; I do wonder if we should be asking for more. */
bd->disk = alloc_disk(1);
if (!bd->disk) {
err = -ENOMEM;
goto out_unregister_blkdev;
}
+ /* Every disk needs a queue for requests to come in: we set up the
+ * queue with a callback function (the core of our driver) and the lock
+ * to use. */
bd->disk->queue = blk_init_queue(do_lgb_request, &bd->lock);
if (!bd->disk->queue) {
err = -ENOMEM;
goto out_put_disk;
}
- /* We can only handle a certain number of sg entries */
+ /* We can only handle a certain number of pointers in our SEND_DMA
+ * call, so we set that with blk_queue_max_hw_segments(). This is not
+ * to be confused with blk_queue_max_phys_segments() of course! I
+ * know, who could possibly confuse the two?
+ *
+ * Well, it's simple to tell them apart: this one seems to work and the
+ * other one didn't. */
blk_queue_max_hw_segments(bd->disk->queue, LGUEST_MAX_DMA_SECTIONS);
- /* Buffers must not cross page boundaries */
+
+ /* Due to technical limitations of our Host (and simple coding) we
+ * can't have a single buffer which crosses a page boundary. Tell it
+ * here. This means that our maximum request size is 16
+ * (LGUEST_MAX_DMA_SECTIONS) pages. */
blk_queue_segment_boundary(bd->disk->queue, PAGE_SIZE-1);
+ /* We name our disk: this becomes the device name when udev does its
+ * magic thing and creates the device node, such as /dev/lgba.
+ * next_block_index is a global which starts at 'a'. Unfortunately
+ * this simple increment logic means that the 27th disk will be called
+ * "/dev/lgb{". In that case, I recommend having at least 29 disks, so
+ * your /dev directory will be balanced. */
sprintf(bd->disk->disk_name, "lgb%c", next_block_index++);
+
+ /* We look to the device descriptor again to see if this device's
+ * interrupts are expected to be random. If they are, we tell the irq
+ * subsystem. At the moment this bit is always set. */
if (lguest_devices[lgdev->index].features & LGUEST_DEVICE_F_RANDOMNESS)
irqflags |= IRQF_SAMPLE_RANDOM;
+
+ /* Now we have the name and irqflags, we can request the interrupt; we
+ * give it the "struct blockdev" we have set up to pass to lgb_irq()
+ * when there is an interrupt. */
err = request_irq(bd->irq, lgb_irq, irqflags, bd->disk->disk_name, bd);
if (err)
goto out_cleanup_queue;
+ /* We bind our one-entry DMA pool to the key for this block device so
+ * the Host can reply to our requests. The key is equal to the
+ * physical address of the device's page, which is conveniently
+ * unique. */
err = lguest_bind_dma(bd->phys_addr, &bd->dma, 1, bd->irq);
if (err)
goto out_free_irq;
+ /* We finish our disk initialization and add the disk to the system. */
bd->disk->major = bd->major;
bd->disk->first_minor = 0;
bd->disk->private_data = bd;
bd->disk->fops = &lguestblk_fops;
- /* This is initialized to the disk size by the other end. */
+ /* This is initialized to the disk size by the Launcher. */
set_capacity(bd->disk, bd->lb_page->num_sectors);
add_disk(bd->disk);
printk(KERN_INFO "%s: device %i at major %d\n",
bd->disk->disk_name, lgdev->index, bd->major);
+ /* We don't need to keep the "struct blockdev" around, but if we ever
+ * implemented device removal, we'd need this. */
lgdev->private = bd;
return 0;
return err;
}
+/*D:410 The boilerplate code for registering the lguest block driver is just
+ * like the console: */
static struct lguest_driver lguestblk_drv = {
.name = "lguestblk",
.owner = THIS_MODULE,
return bio;
}
-static int loop_make_request(request_queue_t *q, struct bio *old_bio)
+static int loop_make_request(struct request_queue *q, struct bio *old_bio)
{
struct loop_device *lo = q->queuedata;
int rw = bio_rw(old_bio);
/*
* kick off io on the underlying address space
*/
-static void loop_unplug(request_queue_t *q)
+static void loop_unplug(struct request_queue *q)
{
struct loop_device *lo = q->queuedata;
static void nbd_end_request(struct request *req)
{
int uptodate = (req->errors == 0) ? 1 : 0;
- request_queue_t *q = req->q;
+ struct request_queue *q = req->q;
unsigned long flags;
dprintk(DBG_BLKDEV, "%s: request %p: %s\n", req->rq_disk->disk_name,
* { printk( "Warning: Ignoring result!\n"); nbd_end_request( req ); }
*/
-static void do_nbd_request(request_queue_t * q)
+static void do_nbd_request(struct request_queue * q)
{
struct request *req;
static int pcd_detect(void);
static void pcd_probe_capabilities(void);
static void do_pcd_read_drq(void);
-static void do_pcd_request(request_queue_t * q);
+static void do_pcd_request(struct request_queue * q);
static void do_pcd_read(void);
struct pcd_unit {
/* I/O request processing */
static struct request_queue *pcd_queue;
-static void do_pcd_request(request_queue_t * q)
+static void do_pcd_request(struct request_queue * q)
{
if (pcd_busy)
return;
/* end of io request engine */
-static void do_pd_request(request_queue_t * q)
+static void do_pd_request(struct request_queue * q)
{
if (pd_req)
return;
#define ATAPI_WRITE_10 0x2a
static int pf_open(struct inode *inode, struct file *file);
-static void do_pf_request(request_queue_t * q);
+static void do_pf_request(struct request_queue * q);
static int pf_ioctl(struct inode *inode, struct file *file,
unsigned int cmd, unsigned long arg);
static int pf_getgeo(struct block_device *bdev, struct hd_geometry *geo);
}
}
-static void do_pf_request(request_queue_t * q)
+static void do_pf_request(struct request_queue * q)
{
if (pf_busy)
return;
*/
static int pkt_generic_packet(struct pktcdvd_device *pd, struct packet_command *cgc)
{
- request_queue_t *q = bdev_get_queue(pd->bdev);
+ struct request_queue *q = bdev_get_queue(pd->bdev);
struct request *rq;
int ret = 0;
* Special care is needed if the underlying block device has a small
* max_phys_segments value.
*/
-static int pkt_set_segment_merging(struct pktcdvd_device *pd, request_queue_t *q)
+static int pkt_set_segment_merging(struct pktcdvd_device *pd, struct request_queue *q)
{
if ((pd->settings.size << 9) / CD_FRAMESIZE <= q->max_phys_segments) {
/*
{
int ret;
long lba;
- request_queue_t *q;
+ struct request_queue *q;
/*
* We need to re-open the cdrom device without O_NONBLOCK to be able
return 0;
}
-static int pkt_make_request(request_queue_t *q, struct bio *bio)
+static int pkt_make_request(struct request_queue *q, struct bio *bio)
{
struct pktcdvd_device *pd;
char b[BDEVNAME_SIZE];
-static int pkt_merge_bvec(request_queue_t *q, struct bio *bio, struct bio_vec *bvec)
+static int pkt_merge_bvec(struct request_queue *q, struct bio *bio, struct bio_vec *bvec)
{
struct pktcdvd_device *pd = q->queuedata;
sector_t zone = ZONE(bio->bi_sector, pd);
static void pkt_init_queue(struct pktcdvd_device *pd)
{
- request_queue_t *q = pd->disk->queue;
+ struct request_queue *q = pd->disk->queue;
blk_queue_make_request(q, pkt_make_request);
blk_queue_hardsect_size(q, CD_FRAMESIZE);
static int ps2esdi_geninit(void);
-static void do_ps2esdi_request(request_queue_t * q);
+static void do_ps2esdi_request(struct request_queue * q);
static void ps2esdi_readwrite(int cmd, struct request *req);
}
/* strategy routine that handles most of the IO requests */
-static void do_ps2esdi_request(request_queue_t * q)
+static void do_ps2esdi_request(struct request_queue * q)
{
struct request *req;
/* since, this routine is called with interrupts cleared - they
}
static void ps3disk_do_request(struct ps3_storage_device *dev,
- request_queue_t *q)
+ struct request_queue *q)
{
struct request *req;
}
}
-static void ps3disk_request(request_queue_t *q)
+static void ps3disk_request(struct request_queue *q)
{
struct ps3_storage_device *dev = q->queuedata;
struct ps3disk_private *priv = dev->sbd.core.driver_data;
return 0;
}
-static void ps3disk_prepare_flush(request_queue_t *q, struct request *req)
+static void ps3disk_prepare_flush(struct request_queue *q, struct request *req)
{
struct ps3_storage_device *dev = q->queuedata;
req->cmd_type = REQ_TYPE_FLUSH;
}
-static int ps3disk_issue_flush(request_queue_t *q, struct gendisk *gendisk,
+static int ps3disk_issue_flush(struct request_queue *q, struct gendisk *gendisk,
sector_t *sector)
{
struct ps3_storage_device *dev = q->queuedata;
* 19-JAN-1998 Richard Gooch <rgooch@atnf.csiro.au> Added devfs support
*
*/
-static int rd_make_request(request_queue_t *q, struct bio *bio)
+static int rd_make_request(struct request_queue *q, struct bio *bio)
{
struct block_device *bdev = bio->bi_bdev;
struct address_space * mapping = bdev->bd_inode->i_mapping;
return err;
}
-static void do_vdc_request(request_queue_t *q)
+static void do_vdc_request(struct request_queue *q)
{
while (1) {
struct request *req = elv_next_request(q);
static void swim3_select(struct floppy_state *fs, int sel);
static void swim3_action(struct floppy_state *fs, int action);
static int swim3_readbit(struct floppy_state *fs, int bit);
-static void do_fd_request(request_queue_t * q);
+static void do_fd_request(struct request_queue * q);
static void start_request(struct floppy_state *fs);
static void set_timeout(struct floppy_state *fs, int nticks,
void (*proc)(unsigned long));
return (stat & DATA) == 0;
}
-static void do_fd_request(request_queue_t * q)
+static void do_fd_request(struct request_queue * q)
{
int i;
for(i=0;i<floppy_count;i++)
unsigned int state;
u32 fw_ver;
- request_queue_t *oob_q;
+ struct request_queue *oob_q;
unsigned int n_oob;
unsigned int hw_sg_used;
unsigned int wait_q_prod;
unsigned int wait_q_cons;
- request_queue_t *wait_q[CARM_MAX_WAIT_Q];
+ struct request_queue *wait_q[CARM_MAX_WAIT_Q];
unsigned int n_msgs;
u64 msg_alloc;
assert(rc == 0);
}
-static inline void carm_push_q (struct carm_host *host, request_queue_t *q)
+static inline void carm_push_q (struct carm_host *host, struct request_queue *q)
{
unsigned int idx = host->wait_q_prod % CARM_MAX_WAIT_Q;
BUG_ON(host->wait_q_prod == host->wait_q_cons); /* overrun */
}
-static inline request_queue_t *carm_pop_q(struct carm_host *host)
+static inline struct request_queue *carm_pop_q(struct carm_host *host)
{
unsigned int idx;
static inline void carm_round_robin(struct carm_host *host)
{
- request_queue_t *q = carm_pop_q(host);
+ struct request_queue *q = carm_pop_q(host);
if (q) {
blk_start_queue(q);
VPRINTK("STARTED QUEUE %p\n", q);
}
}
-static void carm_oob_rq_fn(request_queue_t *q)
+static void carm_oob_rq_fn(struct request_queue *q)
{
struct carm_host *host = q->queuedata;
struct carm_request *crq;
}
}
-static void carm_rq_fn(request_queue_t *q)
+static void carm_rq_fn(struct request_queue *q)
{
struct carm_port *port = q->queuedata;
struct carm_host *host = port->host;
for (i = 0; i < CARM_MAX_PORTS; i++) {
struct gendisk *disk;
- request_queue_t *q;
+ struct request_queue *q;
struct carm_port *port;
port = &host->port[i];
for (i = 0; i < CARM_MAX_PORTS; i++) {
struct gendisk *disk = host->port[i].disk;
if (disk) {
- request_queue_t *q = disk->queue;
+ struct request_queue *q = disk->queue;
if (disk->flags & GENHD_FL_UP)
del_gendisk(disk);
struct carm_host *host;
unsigned int pci_dac;
int rc;
- request_queue_t *q;
+ struct request_queue *q;
unsigned int i;
if (!printed_version++)
{
struct list_head *p;
struct ub_lun *lun;
- request_queue_t *q;
+ struct request_queue *q;
while (!list_empty(&sc->luns)) {
p = sc->luns.next;
* The request function is our main entry point
*/
-static void ub_request_fn(request_queue_t *q)
+static void ub_request_fn(struct request_queue *q)
{
struct ub_lun *lun = q->queuedata;
struct request *rq;
static int ub_probe_lun(struct ub_dev *sc, int lnum)
{
struct ub_lun *lun;
- request_queue_t *q;
+ struct request_queue *q;
struct gendisk *disk;
int rc;
*/
struct bio *bio, *currentbio, **biotail;
- request_queue_t *queue;
+ struct request_queue *queue;
struct mm_page {
dma_addr_t page_dma;
page->biotail = & page->bio;
}
-static void mm_unplug_device(request_queue_t *q)
+static void mm_unplug_device(struct request_queue *q)
{
struct cardinfo *card = q->queuedata;
unsigned long flags;
-- mm_make_request
-----------------------------------------------------------------------------------
*/
-static int mm_make_request(request_queue_t *q, struct bio *bio)
+static int mm_make_request(struct request_queue *q, struct bio *bio)
{
struct cardinfo *card = q->queuedata;
pr_debug("mm_make_request %llu %u\n",
/*
* This is the external request processing routine
*/
-static void do_viodasd_request(request_queue_t *q)
+static void do_viodasd_request(struct request_queue *q)
{
struct request *req;
}
/* do_xd_request: handle an incoming request */
-static void do_xd_request (request_queue_t * q)
+static void do_xd_request (struct request_queue * q)
{
struct request *req;
static u_char xd_detect (u_char *controller, unsigned int *address);
static u_char xd_initdrives (void (*init_drive)(u_char drive));
-static void do_xd_request (request_queue_t * q);
+static void do_xd_request (struct request_queue * q);
static int xd_ioctl (struct inode *inode,struct file *file,unsigned int cmd,unsigned long arg);
static int xd_readwrite (u_char operation,XD_INFO *disk,char *buffer,u_int block,u_int count);
static void xd_recalibrate (u_char drive);
* do_blkif_request
* read a block; request is in a request queue
*/
-static void do_blkif_request(request_queue_t *rq)
+static void do_blkif_request(struct request_queue *rq)
{
struct blkfront_info *info = NULL;
struct request *req;
static int xlvbd_init_blk_queue(struct gendisk *gd, u16 sector_size)
{
- request_queue_t *rq;
+ struct request_queue *rq;
rq = blk_init_queue(do_blkif_request, &blkif_io_lock);
if (rq == NULL)
}
/* Get the next read/write request; ending requests that we don't handle */
-struct request *ace_get_next_request(request_queue_t * q)
+struct request *ace_get_next_request(struct request_queue * q)
{
struct request *req;
/* ---------------------------------------------------------------------
* Block ops
*/
-static void ace_request(request_queue_t * q)
+static void ace_request(struct request_queue * q)
{
struct request *req;
struct ace_device *ace;
static struct block_device_operations z2_fops;
static struct gendisk *z2ram_gendisk;
-static void do_z2_request(request_queue_t *q)
+static void do_z2_request(struct request_queue *q)
{
struct request *req;
while ((req = elv_next_request(q)) != NULL) {
static int cdrom_read_cdda_bpc(struct cdrom_device_info *cdi, __u8 __user *ubuf,
int lba, int nframes)
{
- request_queue_t *q = cdi->disk->queue;
+ struct request_queue *q = cdi->disk->queue;
struct request *rq;
struct bio *bio;
unsigned int len;
static int rwreq;
-static void do_viocd_request(request_queue_t *q)
+static void do_viocd_request(struct request_queue *q)
{
struct request *req;
config CYCLADES
tristate "Cyclades async mux support"
depends on SERIAL_NONSTANDARD && (PCI || ISA)
+ select FW_LOADER
---help---
This driver supports Cyclades Z and Y multiserial boards.
You would need something like this to connect more than two modems to
config RTC
tristate "Enhanced Real Time Clock Support"
- depends on !PPC && !PARISC && !IA64 && !M68K && !SPARC64 && (!SPARC32 || PCI) && !FRV && !ARM && !SUPERH && !S390
+ depends on !PPC && !PARISC && !IA64 && !M68K && !SPARC && !FRV && !ARM && !SUPERH && !S390
---help---
If you say Y here and create a character special file /dev/rtc with
major number 10 and minor number 135 using mknod ("man mknod"), you
To compile this driver as a module, choose M here: the
module will be called rtc.
+config JS_RTC
+ tristate "Enhanced Real Time Clock Support"
+ depends on SPARC32 && PCI
+ ---help---
+ If you say Y here and create a character special file /dev/rtc with
+ major number 10 and minor number 135 using mknod ("man mknod"), you
+ will get access to the real time clock (or hardware clock) built
+ into your computer.
+
+ Every PC has such a clock built in. It can be used to generate
+ signals from as low as 1Hz up to 8192Hz, and can also be used
+ as a 24 hour alarm. It reports status information via the file
+ /proc/driver/rtc and its behaviour is set by various ioctls on
+ /dev/rtc.
+
+ If you think you have a use for such a device (such as periodic data
+ sampling), then say Y here, and read <file:Documentation/rtc.txt>
+ for details.
+
+ To compile this driver as a module, choose M here: the
+ module will be called js-rtc.
+
config SGI_DS1286
tristate "SGI DS1286 RTC support"
depends on SGI_IP22
obj-$(CONFIG_PS3_FLASH) += ps3flash.o
+obj-$(CONFIG_JS_RTC) += js-rtc.o
+js-rtc-y = rtc.o
+
# Files generated that shall be removed upon make clean
clean-files := consolemap_deftbl.c defkeymap.c
config AGP_AMD
tristate "AMD Irongate, 761, and 762 chipset support"
- depends on AGP && X86_32
+ depends on AGP && (X86_32 || ALPHA)
help
This option gives you AGP support for the GLX component of
X on AMD Irongate, 761, and 762 chipsets.
for (i = 0; i < nr_tables; i++) {
entry = kzalloc(sizeof(struct ati_page_map), GFP_KERNEL);
+ tables[i] = entry;
if (entry == NULL) {
- while (i > 0) {
- kfree(tables[i-1]);
- i--;
- }
- kfree(tables);
retval = -ENOMEM;
break;
}
- tables[i] = entry;
retval = ati_create_page_map(entry);
if (retval != 0)
break;
}
- ati_generic_private.num_tables = nr_tables;
+ ati_generic_private.num_tables = i;
ati_generic_private.gatt_pages = tables;
if (retval != 0)
map_page_into_agp(page);
get_page(page);
- SetPageLocked(page);
atomic_inc(&agp_bridge->current_memory_agp);
return page_address(page);
}
page = virt_to_page(addr);
unmap_page_from_agp(page);
put_page(page);
- unlock_page(page);
free_page((unsigned long)addr);
atomic_dec(&agp_bridge->current_memory_agp);
}
#define PCI_DEVICE_ID_INTEL_82965G_IG 0x29A2
#define PCI_DEVICE_ID_INTEL_82965GM_HB 0x2A00
#define PCI_DEVICE_ID_INTEL_82965GM_IG 0x2A02
+#define PCI_DEVICE_ID_INTEL_82965GME_HB 0x2A10
#define PCI_DEVICE_ID_INTEL_82965GME_IG 0x2A12
+#define PCI_DEVICE_ID_INTEL_82945GME_HB 0x27AC
#define PCI_DEVICE_ID_INTEL_82945GME_IG 0x27AE
#define PCI_DEVICE_ID_INTEL_G33_HB 0x29C0
#define PCI_DEVICE_ID_INTEL_G33_IG 0x29C2
agp_bridge->dev->device == PCI_DEVICE_ID_INTEL_82965G_1_HB || \
agp_bridge->dev->device == PCI_DEVICE_ID_INTEL_82965Q_HB || \
agp_bridge->dev->device == PCI_DEVICE_ID_INTEL_82965G_HB || \
- agp_bridge->dev->device == PCI_DEVICE_ID_INTEL_82965GM_HB)
+ agp_bridge->dev->device == PCI_DEVICE_ID_INTEL_82965GM_HB || \
+ agp_bridge->dev->device == PCI_DEVICE_ID_INTEL_82965GME_HB)
#define IS_G33 (agp_bridge->dev->device == PCI_DEVICE_ID_INTEL_G33_HB || \
agp_bridge->dev->device == PCI_DEVICE_ID_INTEL_Q35_HB || \
}
global_flush_tlb();
get_page(page);
- SetPageLocked(page);
atomic_inc(&agp_bridge->current_memory_agp);
return page_address(page);
}
change_page_attr(page, 4, PAGE_KERNEL);
global_flush_tlb();
put_page(page);
- unlock_page(page);
__free_pages(page, 2);
atomic_dec(&agp_bridge->current_memory_agp);
}
agp_bridge->dev->device == PCI_DEVICE_ID_INTEL_82915GM_HB ||
agp_bridge->dev->device == PCI_DEVICE_ID_INTEL_82945G_HB ||
agp_bridge->dev->device == PCI_DEVICE_ID_INTEL_82945GM_HB ||
+ agp_bridge->dev->device == PCI_DEVICE_ID_INTEL_82945GME_HB ||
IS_I965 || IS_G33)
gtt_entries = MB(48) - KB(size);
else
agp_bridge->dev->device == PCI_DEVICE_ID_INTEL_82915GM_HB ||
agp_bridge->dev->device == PCI_DEVICE_ID_INTEL_82945G_HB ||
agp_bridge->dev->device == PCI_DEVICE_ID_INTEL_82945GM_HB ||
+ agp_bridge->dev->device == PCI_DEVICE_ID_INTEL_82945GME_HB ||
IS_I965 || IS_G33)
gtt_entries = MB(64) - KB(size);
else
NULL, &intel_915_driver },
{ PCI_DEVICE_ID_INTEL_82945G_HB, PCI_DEVICE_ID_INTEL_82945G_IG, 0, "945G",
NULL, &intel_915_driver },
- { PCI_DEVICE_ID_INTEL_82945GM_HB, PCI_DEVICE_ID_INTEL_82945GM_IG, 1, "945GM",
+ { PCI_DEVICE_ID_INTEL_82945GM_HB, PCI_DEVICE_ID_INTEL_82945GM_IG, 0, "945GM",
NULL, &intel_915_driver },
- { PCI_DEVICE_ID_INTEL_82945GM_HB, PCI_DEVICE_ID_INTEL_82945GME_IG, 0, "945GME",
+ { PCI_DEVICE_ID_INTEL_82945GME_HB, PCI_DEVICE_ID_INTEL_82945GME_IG, 0, "945GME",
NULL, &intel_915_driver },
{ PCI_DEVICE_ID_INTEL_82946GZ_HB, PCI_DEVICE_ID_INTEL_82946GZ_IG, 0, "946GZ",
NULL, &intel_i965_driver },
NULL, &intel_i965_driver },
{ PCI_DEVICE_ID_INTEL_82965G_HB, PCI_DEVICE_ID_INTEL_82965G_IG, 0, "965G",
NULL, &intel_i965_driver },
- { PCI_DEVICE_ID_INTEL_82965GM_HB, PCI_DEVICE_ID_INTEL_82965GM_IG, 1, "965GM",
+ { PCI_DEVICE_ID_INTEL_82965GM_HB, PCI_DEVICE_ID_INTEL_82965GM_IG, 0, "965GM",
NULL, &intel_i965_driver },
- { PCI_DEVICE_ID_INTEL_82965GM_HB, PCI_DEVICE_ID_INTEL_82965GME_IG, 0, "965GME/GLE",
+ { PCI_DEVICE_ID_INTEL_82965GME_HB, PCI_DEVICE_ID_INTEL_82965GME_IG, 0, "965GME/GLE",
NULL, &intel_i965_driver },
{ PCI_DEVICE_ID_INTEL_7505_0, 0, 0, "E7505", &intel_7505_driver, NULL },
{ PCI_DEVICE_ID_INTEL_7205_0, 0, 0, "E7205", &intel_7505_driver, NULL },
ID(PCI_DEVICE_ID_INTEL_82915GM_HB),
ID(PCI_DEVICE_ID_INTEL_82945G_HB),
ID(PCI_DEVICE_ID_INTEL_82945GM_HB),
+ ID(PCI_DEVICE_ID_INTEL_82945GME_HB),
ID(PCI_DEVICE_ID_INTEL_82946GZ_HB),
ID(PCI_DEVICE_ID_INTEL_82965G_1_HB),
ID(PCI_DEVICE_ID_INTEL_82965Q_HB),
ID(PCI_DEVICE_ID_INTEL_82965G_HB),
ID(PCI_DEVICE_ID_INTEL_82965GM_HB),
+ ID(PCI_DEVICE_ID_INTEL_82965GME_HB),
ID(PCI_DEVICE_ID_INTEL_G33_HB),
ID(PCI_DEVICE_ID_INTEL_Q35_HB),
ID(PCI_DEVICE_ID_INTEL_Q33_HB),
return NULL;
get_page(page);
- SetPageLocked(page);
atomic_inc(&agp_bridge->current_memory_agp);
return page_address(page);
}
.name = "hpet",
.rating = 250,
.read = read_hpet,
- .mask = 0xffffffffffffffff,
+ .mask = CLOCKSOURCE_MASK(64),
.mult = 0, /*to be caluclated*/
.shift = 10,
.flags = CLOCK_SOURCE_IS_CONTINUOUS,
return -EINVAL;
}
+static const struct acpi_device_id hpet_device_ids[] = {
+ {"PNP0103", 0},
+ {"", 0},
+};
+MODULE_DEVICE_TABLE(acpi, hpet_device_ids);
+
static struct acpi_driver hpet_acpi_driver = {
.name = "hpet",
- .ids = "PNP0103",
+ .ids = hpet_device_ids,
.ops = {
.add = hpet_acpi_add,
.remove = hpet_acpi_remove,
-/* Simple console for lguest.
+/*D:300
+ * The Guest console driver
*
- * Copyright (C) 2006 Rusty Russell, IBM Corporation
+ * This is a trivial console driver: we use lguest's DMA mechanism to send
+ * bytes out, and register a DMA buffer to receive bytes in. It is assumed to
+ * be present and available from the very beginning of boot.
+ *
+ * Writing console drivers is one of the few remaining Dark Arts in Linux.
+ * Fortunately for us, the path of virtual consoles has been well-trodden by
+ * the PowerPC folks, who wrote "hvc_console.c" to generically support any
+ * virtual console. We use that infrastructure which only requires us to write
+ * the basic put_chars and get_chars functions and call the right register
+ * functions.
+ :*/
+
+/*M:002 The console can be flooded: while the Guest is processing input the
+ * Host can send more. Buffering in the Host could alleviate this, but it is a
+ * difficult problem in general. :*/
+/* Copyright (C) 2006 Rusty Russell, IBM Corporation
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
#include <linux/lguest_bus.h>
#include "hvc_console.h"
+/*D:340 This is our single console input buffer, with associated "struct
+ * lguest_dma" referring to it. Note the 0-terminated length array, and the
+ * use of physical address for the buffer itself. */
static char inbuf[256];
static struct lguest_dma cons_input = { .used_len = 0,
.addr[0] = __pa(inbuf),
.len[0] = sizeof(inbuf),
.len[1] = 0 };
+/*D:310 The put_chars() callback is pretty straightforward.
+ *
+ * First we put the pointer and length in a "struct lguest_dma": we only have
+ * one pointer, so we set the second length to 0. Then we use SEND_DMA to send
+ * the data to (Host) buffers attached to the console key. Usually a device's
+ * key is a physical address within the device's memory, but because the
+ * console device doesn't have any associated physical memory, we use the
+ * LGUEST_CONSOLE_DMA_KEY constant (aka 0). */
static int put_chars(u32 vtermno, const char *buf, int count)
{
struct lguest_dma dma;
- /* FIXME: what if it's over a page boundary? */
+ /* FIXME: DMA buffers in a "struct lguest_dma" are not allowed
+ * to go over page boundaries. This never seems to happen,
+ * but if it did we'd need to fix this code. */
dma.len[0] = count;
dma.len[1] = 0;
dma.addr[0] = __pa(buf);
lguest_send_dma(LGUEST_CONSOLE_DMA_KEY, &dma);
+ /* We're expected to return the amount of data we wrote: all of it. */
return count;
}
+/*D:350 get_chars() is the callback from the hvc_console infrastructure when
+ * an interrupt is received.
+ *
+ * Firstly we see if our buffer has been filled: if not, we return. The rest
+ * of the code deals with the fact that the hvc_console() infrastructure only
+ * asks us for 16 bytes at a time. We keep a "cons_offset" variable for
+ * partially-read buffers. */
static int get_chars(u32 vtermno, char *buf, int count)
{
static int cons_offset;
+ /* Nothing left to see here... */
if (!cons_input.used_len)
return 0;
+ /* You want more than we have to give? Well, try wanting less! */
if (cons_input.used_len - cons_offset < count)
count = cons_input.used_len - cons_offset;
+ /* Copy across to their buffer and increment offset. */
memcpy(buf, inbuf + cons_offset, count);
cons_offset += count;
+
+ /* Finished? Zero offset, and reset cons_input so Host will use it
+ * again. */
if (cons_offset == cons_input.used_len) {
cons_offset = 0;
cons_input.used_len = 0;
}
return count;
}
+/*:*/
static struct hv_ops lguest_cons = {
.get_chars = get_chars,
.put_chars = put_chars,
};
+/*D:320 Console drivers are initialized very early so boot messages can go
+ * out. At this stage, the console is output-only. Our driver checks we're a
+ * Guest, and if so hands hvc_instantiate() the console number (0), priority
+ * (0), and the struct hv_ops containing the put_chars() function. */
static int __init cons_init(void)
{
if (strcmp(paravirt_ops.name, "lguest") != 0)
}
console_initcall(cons_init);
+/*D:370 To set up and manage our virtual console, we call hvc_alloc() and
+ * stash the result in the private pointer of the "struct lguest_device".
+ * Since we never remove the console device we never need this pointer again,
+ * but using ->private is considered good form, and you never know who's going
+ * to copy your driver.
+ *
+ * Once the console is set up, we bind our input buffer ready for input. */
static int lguestcons_probe(struct lguest_device *lgdev)
{
int err;
+ /* The first argument of hvc_alloc() is the virtual console number, so
+ * we use zero. The second argument is the interrupt number.
+ *
+ * The third argument is a "struct hv_ops" containing the put_chars()
+ * and get_chars() pointers. The final argument is the output buffer
+ * size: we use 256 and expect the Host to have room for us to send
+ * that much. */
lgdev->private = hvc_alloc(0, lgdev_irq(lgdev), &lguest_cons, 256);
if (IS_ERR(lgdev->private))
return PTR_ERR(lgdev->private);
+ /* We bind a single DMA buffer at key LGUEST_CONSOLE_DMA_KEY.
+ * "cons_input" is that statically-initialized global DMA buffer we saw
+ * above, and we also give the interrupt we want. */
err = lguest_bind_dma(LGUEST_CONSOLE_DMA_KEY, &cons_input, 1,
lgdev_irq(lgdev));
if (err)
printk("lguest console: failed to bind buffer.\n");
return err;
}
+/* Note the use of lgdev_irq() for the interrupt number. We tell hvc_alloc()
+ * to expect input when this interrupt is triggered, and then tell
+ * lguest_bind_dma() that is the interrupt to send us when input comes in. */
+/*D:360 From now on the console driver follows standard Guest driver form:
+ * register_lguest_driver() registers the device type and probe function, and
+ * the probe function sets up the device.
+ *
+ * The standard "struct lguest_driver": */
static struct lguest_driver lguestcons_drv = {
.name = "lguestcons",
.owner = THIS_MODULE,
.probe = lguestcons_probe,
};
+/* The standard init function */
static int __init hvc_lguest_init(void)
{
return register_lguest_driver(&lguestcons_drv);
bool "EDAC - error detection and reporting (EXPERIMENTAL)"
depends on HAS_IOMEM
depends on EXPERIMENTAL
- depends on X86 || MIPS || PPC
+ depends on X86 || PPC
help
EDAC is designed to report errors in the core system.
These are low-level errors that are reported in the CPU or
config EDAC_PASEMI
tristate "PA Semi PWRficient"
depends on EDAC_MM_EDAC && PCI
- depends on PPC
+ depends on PPC_PASEMI
help
Support for error detection and correction on PA Semi
PWRficient.
}
EXPORT_SYMBOL_GPL(edac_mc_free);
+
+/*
+ * find_mci_by_dev
+ *
+ * scan list of controllers looking for the one that manages
+ * the 'dev' device
+ */
static struct mem_ctl_info *find_mci_by_dev(struct device *dev)
{
struct mem_ctl_info *mci;
if (edac_mc_assert_error_check_and_clear() && (mci->edac_check != NULL))
mci->edac_check(mci);
- /*
- * FIXME: temp place holder for PCI checks,
- * goes away when we break out PCI
- */
- edac_pci_do_parity_check();
-
mutex_unlock(&mem_ctls_mutex);
/* Reschedule */
{
int status;
- /* if not running POLL, leave now */
- if (mci->op_state == OP_RUNNING_POLL) {
- status = cancel_delayed_work(&mci->work);
- if (status == 0) {
- debugf0("%s() not canceled, flush the queue\n",
- __func__);
+ status = cancel_delayed_work(&mci->work);
+ if (status == 0) {
+ debugf0("%s() not canceled, flush the queue\n",
+ __func__);
- /* workq instance might be running, wait for it */
- flush_workqueue(edac_workqueue);
- }
+ /* workq instance might be running, wait for it */
+ flush_workqueue(edac_workqueue);
}
}
/*
- * edac_reset_delay_period
+ * edac_mc_reset_delay_period(unsigned long value)
+ *
+ * user space has updated our poll period value, need to
+ * reset our workq delays
*/
-static void edac_reset_delay_period(struct mem_ctl_info *mci, unsigned long value)
+void edac_mc_reset_delay_period(int value)
{
- /* cancel the current workq request */
- edac_mc_workq_teardown(mci);
+ struct mem_ctl_info *mci;
+ struct list_head *item;
- /* lock the list of devices for the new setup */
mutex_lock(&mem_ctls_mutex);
- /* restart the workq request, with new delay value */
- edac_mc_workq_setup(mci, value);
+ /* scan the list and turn off all workq timers, doing so under lock
+ */
+ list_for_each(item, &mc_devices) {
+ mci = list_entry(item, struct mem_ctl_info, link);
+
+ if (mci->op_state == OP_RUNNING_POLL)
+ cancel_delayed_work(&mci->work);
+ }
+
+ mutex_unlock(&mem_ctls_mutex);
+
+
+ /* re-walk the list, and reset the poll delay */
+ mutex_lock(&mem_ctls_mutex);
+
+ list_for_each(item, &mc_devices) {
+ mci = list_entry(item, struct mem_ctl_info, link);
+
+ edac_mc_workq_setup(mci, (unsigned long) value);
+ }
mutex_unlock(&mem_ctls_mutex);
}
+
+
/* Return 0 on success, 1 on failure.
* Before calling this function, caller must
* assign a unique value to mci->mc_idx.
return count;
}
+/*
+ * mc poll_msec time value
+ */
+static ssize_t poll_msec_int_store(void *ptr, const char *buffer, size_t count)
+{
+ int *value = (int *)ptr;
+
+ if (isdigit(*buffer)) {
+ *value = simple_strtoul(buffer, NULL, 0);
+
+ /* notify edac_mc engine to reset the poll period */
+ edac_mc_reset_delay_period(*value);
+ }
+
+ return count;
+}
+
/* EDAC sysfs CSROW data structures and methods
*/
S_IRUGO | S_IWUSR, memctrl_int_show, memctrl_int_store);
MEMCTRL_ATTR(edac_mc_poll_msec,
- S_IRUGO | S_IWUSR, memctrl_int_show, memctrl_int_store);
+ S_IRUGO | S_IWUSR, memctrl_int_show, poll_msec_int_store);
/* Base Attributes of the memory ECC object */
static struct memctrl_dev_attribute *memctrl_attr[] = {
extern void edac_device_workq_teardown(struct edac_device_ctl_info *edac_dev);
extern void edac_device_reset_delay_period(struct edac_device_ctl_info
*edac_dev, unsigned long value);
+extern void edac_mc_reset_delay_period(int value);
+
extern void *edac_align_ptr(void *ptr, unsigned size);
/*
extern void edac_sysfs_pci_teardown(void);
extern int edac_pci_get_check_errors(void);
extern int edac_pci_get_poll_msec(void);
+extern void edac_pci_remove_sysfs(struct edac_pci_ctl_info *pci);
+extern void edac_pci_handle_pe(struct edac_pci_ctl_info *pci, const char *msg);
+extern void edac_pci_handle_npe(struct edac_pci_ctl_info *pci,
+ const char *msg);
#else /* CONFIG_PCI */
/* pre-process these away */
#define edac_pci_do_parity_check()
#define edac_sysfs_pci_teardown()
#define edac_pci_get_check_errors()
#define edac_pci_get_poll_msec()
+#define edac_pci_handle_pe()
+#define edac_pci_handle_npe()
#endif /* CONFIG_PCI */
#endif /* __EDAC_MODULE_H__ */
static DEFINE_MUTEX(edac_pci_ctls_mutex);
static struct list_head edac_pci_list = LIST_HEAD_INIT(edac_pci_list);
-static inline void edac_lock_pci_list(void)
-{
- mutex_lock(&edac_pci_ctls_mutex);
-}
-
-static inline void edac_unlock_pci_list(void)
-{
- mutex_unlock(&edac_pci_ctls_mutex);
-}
-
/*
- * The alloc() and free() functions for the 'edac_pci' control info
- * structure. The chip driver will allocate one of these for each
- * edac_pci it is going to control/register with the EDAC CORE.
+ * edac_pci_alloc_ctl_info
+ *
+ * The alloc() function for the 'edac_pci' control info
+ * structure. The chip driver will allocate one of these for each
+ * edac_pci it is going to control/register with the EDAC CORE.
*/
struct edac_pci_ctl_info *edac_pci_alloc_ctl_info(unsigned int sz_pvt,
const char *edac_pci_name)
void *pvt;
unsigned int size;
+ debugf1("%s()\n", __func__);
+
pci = (struct edac_pci_ctl_info *)0;
pvt = edac_align_ptr(&pci[1], sz_pvt);
size = ((unsigned long)pvt) + sz_pvt;
- if ((pci = kzalloc(size, GFP_KERNEL)) == NULL)
+ /* Alloc the needed control struct memory */
+ pci = kzalloc(size, GFP_KERNEL);
+ if (pci == NULL)
return NULL;
+ /* Now much private space */
pvt = sz_pvt ? ((char *)pci) + ((unsigned long)pvt) : NULL;
pci->pvt_info = pvt;
-
pci->op_state = OP_ALLOC;
snprintf(pci->name, strlen(edac_pci_name) + 1, "%s", edac_pci_name);
return pci;
}
-
EXPORT_SYMBOL_GPL(edac_pci_alloc_ctl_info);
/*
* edac_pci_free_ctl_info()
- * frees the memory allocated by edac_pci_alloc_ctl_info() function
+ *
+ * Last action on the pci control structure.
+ *
+ * call the remove sysfs informaton, which will unregister
+ * this control struct's kobj. When that kobj's ref count
+ * goes to zero, its release function will be call and then
+ * kfree() the memory.
*/
void edac_pci_free_ctl_info(struct edac_pci_ctl_info *pci)
{
- kfree(pci);
-}
+ debugf1("%s()\n", __func__);
+ edac_pci_remove_sysfs(pci);
+}
EXPORT_SYMBOL_GPL(edac_pci_free_ctl_info);
/*
* find_edac_pci_by_dev()
* scans the edac_pci list for a specific 'struct device *'
+ *
+ * return NULL if not found, or return control struct pointer
*/
static struct edac_pci_ctl_info *find_edac_pci_by_dev(struct device *dev)
{
struct edac_pci_ctl_info *pci;
struct list_head *item;
- debugf3("%s()\n", __func__);
+ debugf1("%s()\n", __func__);
list_for_each(item, &edac_pci_list) {
pci = list_entry(item, struct edac_pci_ctl_info, link);
struct list_head *item, *insert_before;
struct edac_pci_ctl_info *rover;
+ debugf1("%s()\n", __func__);
+
insert_before = &edac_pci_list;
/* Determine if already on the list */
- if (unlikely((rover = find_edac_pci_by_dev(pci->dev)) != NULL))
+ rover = find_edac_pci_by_dev(pci->dev);
+ if (unlikely(rover != NULL))
goto fail0;
/* Insert in ascending order by 'pci_idx', so find position */
/*
* complete_edac_pci_list_del
+ *
+ * RCU completion callback to indicate item is deleted
*/
static void complete_edac_pci_list_del(struct rcu_head *head)
{
/*
* del_edac_pci_from_global_list
+ *
+ * remove the PCI control struct from the global list
*/
static void del_edac_pci_from_global_list(struct edac_pci_ctl_info *pci)
{
return NULL;
}
-
EXPORT_SYMBOL_GPL(edac_pci_find);
/*
* edac_pci_workq_function()
- * performs the operation scheduled by a workq request
+ *
+ * periodic function that performs the operation
+ * scheduled by a workq request, for a given PCI control struct
*/
static void edac_pci_workq_function(struct work_struct *work_req)
{
struct delayed_work *d_work = (struct delayed_work *)work_req;
struct edac_pci_ctl_info *pci = to_edac_pci_ctl_work(d_work);
+ int msec;
+ unsigned long delay;
- edac_lock_pci_list();
+ debugf3("%s() checking\n", __func__);
- if ((pci->op_state == OP_RUNNING_POLL) &&
- (pci->edac_check != NULL) && (edac_pci_get_check_errors()))
- pci->edac_check(pci);
+ mutex_lock(&edac_pci_ctls_mutex);
- edac_unlock_pci_list();
+ if (pci->op_state == OP_RUNNING_POLL) {
+ /* we might be in POLL mode, but there may NOT be a poll func
+ */
+ if ((pci->edac_check != NULL) && edac_pci_get_check_errors())
+ pci->edac_check(pci);
+
+ /* if we are on a one second period, then use round */
+ msec = edac_pci_get_poll_msec();
+ if (msec == 1000)
+ delay = round_jiffies(msecs_to_jiffies(msec));
+ else
+ delay = msecs_to_jiffies(msec);
+
+ /* Reschedule only if we are in POLL mode */
+ queue_delayed_work(edac_workqueue, &pci->work, delay);
+ }
- /* Reschedule */
- queue_delayed_work(edac_workqueue, &pci->work,
- msecs_to_jiffies(edac_pci_get_poll_msec()));
+ mutex_unlock(&edac_pci_ctls_mutex);
}
/*
* edac_pci_workq_setup()
* initialize a workq item for this edac_pci instance
* passing in the new delay period in msec
+ *
+ * locking model:
+ * called when 'edac_pci_ctls_mutex' is locked
*/
static void edac_pci_workq_setup(struct edac_pci_ctl_info *pci,
unsigned int msec)
{
int status;
+ debugf0("%s()\n", __func__);
+
status = cancel_delayed_work(&pci->work);
if (status == 0)
flush_workqueue(edac_workqueue);
/*
* edac_pci_reset_delay_period
+ *
+ * called with a new period value for the workq period
+ * a) stop current workq timer
+ * b) restart workq timer with new value
*/
void edac_pci_reset_delay_period(struct edac_pci_ctl_info *pci,
unsigned long value)
{
- edac_lock_pci_list();
+ debugf0("%s()\n", __func__);
edac_pci_workq_teardown(pci);
+ /* need to lock for the setup */
+ mutex_lock(&edac_pci_ctls_mutex);
+
edac_pci_workq_setup(pci, value);
- edac_unlock_pci_list();
+ mutex_unlock(&edac_pci_ctls_mutex);
}
-
EXPORT_SYMBOL_GPL(edac_pci_reset_delay_period);
/*
debugf0("%s()\n", __func__);
pci->pci_idx = edac_idx;
+ pci->start_time = jiffies;
- edac_lock_pci_list();
+ mutex_lock(&edac_pci_ctls_mutex);
if (add_edac_pci_to_global_list(pci))
goto fail0;
- pci->start_time = jiffies;
-
if (edac_pci_create_sysfs(pci)) {
edac_pci_printk(pci, KERN_WARNING,
"failed to create sysfs pci\n");
pci->ctl_name,
dev_name(pci), edac_op_state_to_string(pci->op_state));
- edac_unlock_pci_list();
+ mutex_unlock(&edac_pci_ctls_mutex);
return 0;
+ /* error unwind stack */
fail1:
del_edac_pci_from_global_list(pci);
fail0:
- edac_unlock_pci_list();
+ mutex_unlock(&edac_pci_ctls_mutex);
return 1;
}
-
EXPORT_SYMBOL_GPL(edac_pci_add_device);
/*
debugf0("%s()\n", __func__);
- edac_lock_pci_list();
+ mutex_lock(&edac_pci_ctls_mutex);
- if ((pci = find_edac_pci_by_dev(dev)) == NULL) {
- edac_unlock_pci_list();
+ /* ensure the control struct is on the global list
+ * if not, then leave
+ */
+ pci = find_edac_pci_by_dev(dev);
+ if (pci == NULL) {
+ mutex_unlock(&edac_pci_ctls_mutex);
return NULL;
}
pci->op_state = OP_OFFLINE;
- edac_pci_workq_teardown(pci);
-
- edac_pci_remove_sysfs(pci);
-
del_edac_pci_from_global_list(pci);
- edac_unlock_pci_list();
+ mutex_unlock(&edac_pci_ctls_mutex);
+
+ /* stop the workq timer */
+ edac_pci_workq_teardown(pci);
edac_printk(KERN_INFO, EDAC_PCI,
"Removed device %d for %s %s: DEV %s\n",
return pci;
}
-
EXPORT_SYMBOL_GPL(edac_pci_del_device);
+/*
+ * edac_pci_generic_check
+ *
+ * a Generic parity check API
+ */
void edac_pci_generic_check(struct edac_pci_ctl_info *pci)
{
+ debugf4("%s()\n", __func__);
edac_pci_do_parity_check();
}
+/* free running instance index counter */
static int edac_pci_idx;
#define EDAC_PCI_GENCTL_NAME "EDAC PCI controller"
int edac_idx;
};
+/*
+ * edac_pci_create_generic_ctl
+ *
+ * A generic constructor for a PCI parity polling device
+ * Some systems have more than one domain of PCI busses.
+ * For systems with one domain, then this API will
+ * provide for a generic poller.
+ *
+ * This routine calls the edac_pci_alloc_ctl_info() for
+ * the generic device, with default values
+ */
struct edac_pci_ctl_info *edac_pci_create_generic_ctl(struct device *dev,
const char *mod_name)
{
return pci;
}
-
EXPORT_SYMBOL_GPL(edac_pci_create_generic_ctl);
+/*
+ * edac_pci_release_generic_ctl
+ *
+ * The release function of a generic EDAC PCI polling device
+ */
void edac_pci_release_generic_ctl(struct edac_pci_ctl_info *pci)
{
+ debugf0("%s() pci mod=%s\n", __func__, pci->mod_name);
+
edac_pci_del_device(pci->dev);
edac_pci_free_ctl_info(pci);
}
-
EXPORT_SYMBOL_GPL(edac_pci_release_generic_ctl);
#include "edac_core.h"
#include "edac_module.h"
+/* Turn off this whole feature if PCI is not configured */
#ifdef CONFIG_PCI
#define EDAC_PCI_SYMLINK "device"
-static int check_pci_errors; /* default YES check PCI parity */
-static int edac_pci_panic_on_pe; /* default no panic on PCI Parity */
-static int edac_pci_log_pe = 1; /* log PCI parity errors */
+/* data variables exported via sysfs */
+static int check_pci_errors; /* default NO check PCI parity */
+static int edac_pci_panic_on_pe; /* default NO panic on PCI Parity */
+static int edac_pci_log_pe = 1; /* log PCI parity errors */
static int edac_pci_log_npe = 1; /* log PCI non-parity error errors */
+static int edac_pci_poll_msec = 1000; /* one second workq period */
+
static atomic_t pci_parity_count = ATOMIC_INIT(0);
static atomic_t pci_nonparity_count = ATOMIC_INIT(0);
-static int edac_pci_poll_msec = 1000;
-static struct kobject edac_pci_kobj; /* /sys/devices/system/edac/pci */
-static struct completion edac_pci_kobj_complete;
+static struct kobject edac_pci_top_main_kobj;
static atomic_t edac_pci_sysfs_refcount = ATOMIC_INIT(0);
+/* getter functions for the data variables */
int edac_pci_get_check_errors(void)
{
return check_pci_errors;
{
struct edac_pci_ctl_info *pci;
- debugf1("%s()\n", __func__);
+ debugf0("%s()\n", __func__);
+ /* Form pointer to containing struct, the pci control struct */
pci = to_instance(kobj);
- complete(&pci->kobj_complete);
+
+ /* decrement reference count on top main kobj */
+ kobject_put(&edac_pci_top_main_kobj);
+
+ kfree(pci); /* Free the control struct */
}
/* instance specific attribute structure */
struct instance_attribute {
struct attribute attr;
- ssize_t(*show) (struct edac_pci_ctl_info *, char *);
- ssize_t(*store) (struct edac_pci_ctl_info *, const char *, size_t);
+ ssize_t(*show) (struct edac_pci_ctl_info *, char *);
+ ssize_t(*store) (struct edac_pci_ctl_info *, const char *, size_t);
};
/* Function to 'show' fields from the edac_pci 'instance' structure */
return -EIO;
}
+/* fs_ops table */
static struct sysfs_ops pci_instance_ops = {
.show = edac_pci_instance_show,
.store = edac_pci_instance_store
NULL
};
-/* the ktype for pci instance */
+/* the ktype for a pci instance */
static struct kobj_type ktype_pci_instance = {
.release = edac_pci_instance_release,
.sysfs_ops = &pci_instance_ops,
.default_attrs = (struct attribute **)pci_instance_attr,
};
+/*
+ * edac_pci_create_instance_kobj
+ *
+ * construct one EDAC PCI instance's kobject for use
+ */
static int edac_pci_create_instance_kobj(struct edac_pci_ctl_info *pci, int idx)
{
+ struct kobject *main_kobj;
int err;
- pci->kobj.parent = &edac_pci_kobj;
+ debugf0("%s()\n", __func__);
+
+ /* Set the parent and the instance's ktype */
+ pci->kobj.parent = &edac_pci_top_main_kobj;
pci->kobj.ktype = &ktype_pci_instance;
err = kobject_set_name(&pci->kobj, "pci%d", idx);
if (err)
return err;
+ /* First bump the ref count on the top main kobj, which will
+ * track the number of PCI instances we have, and thus nest
+ * properly on keeping the module loaded
+ */
+ main_kobj = kobject_get(&edac_pci_top_main_kobj);
+ if (!main_kobj) {
+ err = -ENODEV;
+ goto error_out;
+ }
+
+ /* And now register this new kobject under the main kobj */
err = kobject_register(&pci->kobj);
if (err != 0) {
debugf2("%s() failed to register instance pci%d\n",
__func__, idx);
- return err;
+ kobject_put(&edac_pci_top_main_kobj);
+ goto error_out;
}
debugf1("%s() Register instance 'pci%d' kobject\n", __func__, idx);
return 0;
+
+ /* Error unwind statck */
+error_out:
+ return err;
}
-static void
-edac_pci_delete_instance_kobj(struct edac_pci_ctl_info *pci, int idx)
+/*
+ * edac_pci_unregister_sysfs_instance_kobj
+ *
+ * unregister the kobj for the EDAC PCI instance
+ */
+void edac_pci_unregister_sysfs_instance_kobj(struct edac_pci_ctl_info *pci)
{
- init_completion(&pci->kobj_complete);
+ debugf0("%s()\n", __func__);
+
+ /* Unregister the instance kobject and allow its release
+ * function release the main reference count and then
+ * kfree the memory
+ */
kobject_unregister(&pci->kobj);
- wait_for_completion(&pci->kobj_complete);
}
/***************************** EDAC PCI sysfs root **********************/
#define to_edacpci(k) container_of(k, struct edac_pci_ctl_info, kobj)
#define to_edacpci_attr(a) container_of(a, struct edac_pci_attr, attr)
+/* simple show/store functions for attributes */
static ssize_t edac_pci_int_show(void *ptr, char *buffer)
{
int *value = ptr;
NULL,
};
-/* No memory to release */
-static void edac_pci_release(struct kobject *kobj)
+/*
+ * edac_pci_release_main_kobj
+ *
+ * This release function is called when the reference count to the
+ * passed kobj goes to zero.
+ *
+ * This kobj is the 'main' kobject that EDAC PCI instances
+ * link to, and thus provide for proper nesting counts
+ */
+static void edac_pci_release_main_kobj(struct kobject *kobj)
{
- struct edac_pci_ctl_info *pci;
- pci = to_edacpci(kobj);
+ debugf0("%s() here to module_put(THIS_MODULE)\n", __func__);
- debugf1("%s()\n", __func__);
- complete(&pci->kobj_complete);
+ /* last reference to top EDAC PCI kobject has been removed,
+ * NOW release our ref count on the core module
+ */
+ module_put(THIS_MODULE);
}
-static struct kobj_type ktype_edac_pci = {
- .release = edac_pci_release,
+/* ktype struct for the EDAC PCI main kobj */
+static struct kobj_type ktype_edac_pci_main_kobj = {
+ .release = edac_pci_release_main_kobj,
.sysfs_ops = &edac_pci_sysfs_ops,
.default_attrs = (struct attribute **)edac_pci_attr,
};
/**
- * edac_sysfs_pci_setup()
+ * edac_pci_main_kobj_setup()
*
* setup the sysfs for EDAC PCI attributes
* assumes edac_class has already been initialized
*/
-int edac_pci_register_main_kobj(void)
+int edac_pci_main_kobj_setup(void)
{
int err;
struct sysdev_class *edac_class;
- debugf1("%s()\n", __func__);
+ debugf0("%s()\n", __func__);
+
+ /* check and count if we have already created the main kobject */
+ if (atomic_inc_return(&edac_pci_sysfs_refcount) != 1)
+ return 0;
+ /* First time, so create the main kobject and its
+ * controls and atributes
+ */
edac_class = edac_get_edac_class();
if (edac_class == NULL) {
debugf1("%s() no edac_class\n", __func__);
- return -ENODEV;
+ err = -ENODEV;
+ goto decrement_count_fail;
}
- edac_pci_kobj.ktype = &ktype_edac_pci;
+ /* Need the kobject hook ups, and name setting */
+ edac_pci_top_main_kobj.ktype = &ktype_edac_pci_main_kobj;
+ edac_pci_top_main_kobj.parent = &edac_class->kset.kobj;
- edac_pci_kobj.parent = &edac_class->kset.kobj;
-
- err = kobject_set_name(&edac_pci_kobj, "pci");
+ err = kobject_set_name(&edac_pci_top_main_kobj, "pci");
if (err)
- return err;
+ goto decrement_count_fail;
+
+ /* Bump the reference count on this module to ensure the
+ * modules isn't unloaded until we deconstruct the top
+ * level main kobj for EDAC PCI
+ */
+ if (!try_module_get(THIS_MODULE)) {
+ debugf1("%s() try_module_get() failed\n", __func__);
+ err = -ENODEV;
+ goto decrement_count_fail;
+ }
/* Instanstiate the pci object */
/* FIXME: maybe new sysdev_create_subdir() */
- err = kobject_register(&edac_pci_kobj);
-
+ err = kobject_register(&edac_pci_top_main_kobj);
if (err) {
debugf1("Failed to register '.../edac/pci'\n");
- return err;
+ goto kobject_register_fail;
}
+ /* At this point, to 'release' the top level kobject
+ * for EDAC PCI, then edac_pci_main_kobj_teardown()
+ * must be used, for resources to be cleaned up properly
+ */
debugf1("Registered '.../edac/pci' kobject\n");
return 0;
+
+ /* Error unwind statck */
+kobject_register_fail:
+ module_put(THIS_MODULE);
+
+decrement_count_fail:
+ /* if are on this error exit, nothing to tear down */
+ atomic_dec(&edac_pci_sysfs_refcount);
+
+ return err;
}
/*
- * edac_pci_unregister_main_kobj()
+ * edac_pci_main_kobj_teardown()
*
- * perform the sysfs teardown for the PCI attributes
+ * if no longer linked (needed) remove the top level EDAC PCI
+ * kobject with its controls and attributes
*/
-void edac_pci_unregister_main_kobj(void)
+static void edac_pci_main_kobj_teardown(void)
{
debugf0("%s()\n", __func__);
- init_completion(&edac_pci_kobj_complete);
- kobject_unregister(&edac_pci_kobj);
- wait_for_completion(&edac_pci_kobj_complete);
+
+ /* Decrement the count and only if no more controller instances
+ * are connected perform the unregisteration of the top level
+ * main kobj
+ */
+ if (atomic_dec_return(&edac_pci_sysfs_refcount) == 0) {
+ debugf0("%s() called kobject_unregister on main kobj\n",
+ __func__);
+ kobject_unregister(&edac_pci_top_main_kobj);
+ }
}
+/*
+ *
+ * edac_pci_create_sysfs
+ *
+ * Create the controls/attributes for the specified EDAC PCI device
+ */
int edac_pci_create_sysfs(struct edac_pci_ctl_info *pci)
{
int err;
struct kobject *edac_kobj = &pci->kobj;
- if (atomic_inc_return(&edac_pci_sysfs_refcount) == 1) {
- err = edac_pci_register_main_kobj();
- if (err) {
- atomic_dec(&edac_pci_sysfs_refcount);
- return err;
- }
- }
+ debugf0("%s() idx=%d\n", __func__, pci->pci_idx);
- err = edac_pci_create_instance_kobj(pci, pci->pci_idx);
- if (err) {
- if (atomic_dec_return(&edac_pci_sysfs_refcount) == 0)
- edac_pci_unregister_main_kobj();
- }
+ /* create the top main EDAC PCI kobject, IF needed */
+ err = edac_pci_main_kobj_setup();
+ if (err)
+ return err;
- debugf0("%s() idx=%d\n", __func__, pci->pci_idx);
+ /* Create this instance's kobject under the MAIN kobject */
+ err = edac_pci_create_instance_kobj(pci, pci->pci_idx);
+ if (err)
+ goto unregister_cleanup;
err = sysfs_create_link(edac_kobj, &pci->dev->kobj, EDAC_PCI_SYMLINK);
if (err) {
debugf0("%s() sysfs_create_link() returned err= %d\n",
__func__, err);
- return err;
+ goto symlink_fail;
}
return 0;
+
+ /* Error unwind stack */
+symlink_fail:
+ edac_pci_unregister_sysfs_instance_kobj(pci);
+
+unregister_cleanup:
+ edac_pci_main_kobj_teardown();
+
+ return err;
}
+/*
+ * edac_pci_remove_sysfs
+ *
+ * remove the controls and attributes for this EDAC PCI device
+ */
void edac_pci_remove_sysfs(struct edac_pci_ctl_info *pci)
{
- debugf0("%s()\n", __func__);
-
- edac_pci_delete_instance_kobj(pci, pci->pci_idx);
+ debugf0("%s() index=%d\n", __func__, pci->pci_idx);
+ /* Remove the symlink */
sysfs_remove_link(&pci->kobj, EDAC_PCI_SYMLINK);
- if (atomic_dec_return(&edac_pci_sysfs_refcount) == 0)
- edac_pci_unregister_main_kobj();
+ /* remove this PCI instance's sysfs entries */
+ edac_pci_unregister_sysfs_instance_kobj(pci);
+
+ /* Call the main unregister function, which will determine
+ * if this 'pci' is the last instance.
+ * If it is, the main kobject will be unregistered as a result
+ */
+ debugf0("%s() calling edac_pci_main_kobj_teardown()\n", __func__);
+ edac_pci_main_kobj_teardown();
}
/************************ PCI error handling *************************/
return status;
}
-typedef void (*pci_parity_check_fn_t) (struct pci_dev * dev);
/* Clear any PCI parity errors logged by this device. */
static void edac_pci_dev_parity_clear(struct pci_dev *dev)
{
u8 header_type;
+ debugf0("%s()\n", __func__);
+
get_pci_parity_status(dev, 0);
/* read the device TYPE, looking for bridges */
/*
* PCI Parity polling
*
+ * Fucntion to retrieve the current parity status
+ * and decode it
+ *
*/
static void edac_pci_dev_parity_test(struct pci_dev *dev)
{
+ unsigned long flags;
u16 status;
u8 header_type;
- /* read the STATUS register on this device
- */
+ /* stop any interrupts until we can acquire the status */
+ local_irq_save(flags);
+
+ /* read the STATUS register on this device */
status = get_pci_parity_status(dev, 0);
- debugf2("PCI STATUS= 0x%04x %s\n", status, dev->dev.bus_id);
+ /* read the device TYPE, looking for bridges */
+ pci_read_config_byte(dev, PCI_HEADER_TYPE, &header_type);
+
+ local_irq_restore(flags);
+
+ debugf4("PCI STATUS= 0x%04x %s\n", status, dev->dev.bus_id);
/* check the status reg for errors */
if (status) {
}
}
- /* read the device TYPE, looking for bridges */
- pci_read_config_byte(dev, PCI_HEADER_TYPE, &header_type);
- debugf2("PCI HEADER TYPE= 0x%02x %s\n", header_type, dev->dev.bus_id);
+ debugf4("PCI HEADER TYPE= 0x%02x %s\n", header_type, dev->dev.bus_id);
if ((header_type & 0x7F) == PCI_HEADER_TYPE_BRIDGE) {
/* On bridges, need to examine secondary status register */
status = get_pci_parity_status(dev, 1);
- debugf2("PCI SEC_STATUS= 0x%04x %s\n", status, dev->dev.bus_id);
+ debugf4("PCI SEC_STATUS= 0x%04x %s\n", status, dev->dev.bus_id);
/* check the secondary status reg for errors */
if (status) {
}
}
+/* reduce some complexity in definition of the iterator */
+typedef void (*pci_parity_check_fn_t) (struct pci_dev *dev);
+
/*
* pci_dev parity list iterator
- * Scan the PCI device list for one iteration, looking for SERRORs
+ * Scan the PCI device list for one pass, looking for SERRORs
* Master Parity ERRORS or Parity ERRORs on primary or secondary devices
*/
static inline void edac_pci_dev_parity_iterator(pci_parity_check_fn_t fn)
*/
void edac_pci_do_parity_check(void)
{
- unsigned long flags;
int before_count;
debugf3("%s()\n", __func__);
+ /* if policy has PCI check off, leave now */
if (!check_pci_errors)
return;
before_count = atomic_read(&pci_parity_count);
/* scan all PCI devices looking for a Parity Error on devices and
- * bridges
+ * bridges.
+ * The iterator calls pci_get_device() which might sleep, thus
+ * we cannot disable interrupts in this scan.
*/
- local_irq_save(flags);
edac_pci_dev_parity_iterator(edac_pci_dev_parity_test);
- local_irq_restore(flags);
/* Only if operator has selected panic on PCI Error */
if (edac_pci_get_panic_on_pe()) {
}
}
+/*
+ * edac_pci_clear_parity_errors
+ *
+ * function to perform an iteration over the PCI devices
+ * and clearn their current status
+ */
void edac_pci_clear_parity_errors(void)
{
/* Clear any PCI bus parity errors that devices initially have logged
*/
edac_pci_dev_parity_iterator(edac_pci_dev_parity_clear);
}
+
+/*
+ * edac_pci_handle_pe
+ *
+ * Called to handle a PARITY ERROR event
+ */
void edac_pci_handle_pe(struct edac_pci_ctl_info *pci, const char *msg)
{
*/
edac_pci_do_parity_check();
}
-
EXPORT_SYMBOL_GPL(edac_pci_handle_pe);
+
+/*
+ * edac_pci_handle_npe
+ *
+ * Called to handle a NON-PARITY ERROR event
+ */
void edac_pci_handle_npe(struct edac_pci_ctl_info *pci, const char *msg)
{
*/
edac_pci_do_parity_check();
}
-
EXPORT_SYMBOL_GPL(edac_pci_handle_npe);
/*
unsigned char *c0dra = dra, *c1dra = &dra[I3000_RANKS_PER_CHANNEL / 2];
unsigned char *c0drb = drb, *c1drb = &drb[I3000_RANKS_PER_CHANNEL];
unsigned long mchbar;
- void *window;
+ void __iomem *window;
debugf0("MC: %s()\n", __func__);
/* Special case: the 32 bit regs are time values with 1/4s
* resolution, scale them up to milliseconds */
if (sattr->nr == 4)
- return sprintf(buf, "%llu\n", ((u64) le32_to_cpu(val)) * 250);
+ return sprintf(buf, "%llu\n",
+ ((unsigned long long)le32_to_cpu(val)) * 250);
/* Format the output string and return # of bytes */
return sprintf(buf, "%li\n", (long)le32_to_cpu(val));
/*
* standard prep_rq_fn that builds 10 byte cmds
*/
-static int ide_cdrom_prep_fs(request_queue_t *q, struct request *rq)
+static int ide_cdrom_prep_fs(struct request_queue *q, struct request *rq)
{
int hard_sect = queue_hardsect_size(q);
long block = (long)rq->hard_sector / (hard_sect >> 9);
return BLKPREP_OK;
}
-static int ide_cdrom_prep_fn(request_queue_t *q, struct request *rq)
+static int ide_cdrom_prep_fn(struct request_queue *q, struct request *rq)
{
if (blk_fs_request(rq))
return ide_cdrom_prep_fs(q, rq);
};
#endif /* CONFIG_IDE_PROC_FS */
-static void idedisk_prepare_flush(request_queue_t *q, struct request *rq)
+static void idedisk_prepare_flush(struct request_queue *q, struct request *rq)
{
ide_drive_t *drive = q->queuedata;
rq->buffer = rq->cmd;
}
-static int idedisk_issue_flush(request_queue_t *q, struct gendisk *disk,
+static int idedisk_issue_flush(struct request_queue *q, struct gendisk *disk,
sector_t *error_sector)
{
ide_drive_t *drive = q->queuedata;
/*
* Passes the stuff to ide_do_request
*/
-void do_ide_request(request_queue_t *q)
+void do_ide_request(struct request_queue *q)
{
ide_drive_t *drive = q->queuedata;
*/
static int ide_init_queue(ide_drive_t *drive)
{
- request_queue_t *q;
+ struct request_queue *q;
ide_hwif_t *hwif = HWIF(drive);
int max_sectors = 256;
int max_sg_entries = PRD_ENTRIES;
}
}
-static void do_hd_request (request_queue_t * q)
+static void do_hd_request (struct request_queue * q)
{
disable_irq(HD_IRQ);
hd_request();
unsigned long dma_base = pci_resource_start(dev, 1);
unsigned long ctl_size = pci_resource_len(dev, 0);
unsigned long dma_size = pci_resource_len(dev, 1);
- void *ctl_addr;
- void *dma_addr;
+ void __iomem *ctl_addr;
+ void __iomem *dma_addr;
int i;
for (i = 0; i < MAX_HWIFS; i++) {
struct raw1394_iso_packets32 __user *arg)
{
compat_uptr_t infos32;
- void *infos;
+ void __user *infos;
long err = -EFAULT;
struct raw1394_iso_packets __user *dst = compat_alloc_user_space(sizeof(struct raw1394_iso_packets));
#define ACPI_ATLAS_NAME "Atlas ACPI"
#define ACPI_ATLAS_CLASS "Atlas"
-#define ACPI_ATLAS_BUTTON_HID "ASIM0000"
static struct input_dev *input_dev;
return status;
}
+static const struct acpi_device_id atlas_device_ids[] = {
+ {"ASIM0000", 0},
+ {"", 0},
+};
+MODULE_DEVICE_TABLE(acpi, atlas_device_ids);
+
static struct acpi_driver atlas_acpi_driver = {
.name = ACPI_ATLAS_NAME,
.class = ACPI_ATLAS_CLASS,
- .ids = ACPI_ATLAS_BUTTON_HID,
+ .ids = atlas_device_ids,
.ops = {
.add = atlas_acpi_button_add,
.remove = atlas_acpi_button_remove,
kvm_io_bus_init(&kvm->pio_bus);
spin_lock_init(&kvm->lock);
INIT_LIST_HEAD(&kvm->active_mmu_pages);
- spin_lock(&kvm_lock);
- list_add(&kvm->vm_list, &vm_list);
- spin_unlock(&kvm_lock);
kvm_io_bus_init(&kvm->mmio_bus);
for (i = 0; i < KVM_MAX_VCPUS; ++i) {
struct kvm_vcpu *vcpu = &kvm->vcpus[i];
vcpu->kvm = kvm;
vcpu->mmu.root_hpa = INVALID_PAGE;
}
+ spin_lock(&kvm_lock);
+ list_add(&kvm->vm_list, &vm_list);
+ spin_unlock(&kvm_lock);
return kvm;
}
return 0;
mark_page_dirty(vcpu->kvm, gpa >> PAGE_SHIFT);
virt = kmap_atomic(page, KM_USER0);
- if (memcmp(virt + offset_in_page(gpa), val, bytes)) {
- kvm_mmu_pte_write(vcpu, gpa, virt + offset, val, bytes);
- memcpy(virt + offset_in_page(gpa), val, bytes);
- }
+ kvm_mmu_pte_write(vcpu, gpa, virt + offset, val, bytes);
+ memcpy(virt + offset_in_page(gpa), val, bytes);
kunmap_atomic(virt, KM_USER0);
return 1;
}
-static int emulator_write_emulated(unsigned long addr,
- const void *val,
- unsigned int bytes,
- struct x86_emulate_ctxt *ctxt)
+static int emulator_write_emulated_onepage(unsigned long addr,
+ const void *val,
+ unsigned int bytes,
+ struct x86_emulate_ctxt *ctxt)
{
struct kvm_vcpu *vcpu = ctxt->vcpu;
struct kvm_io_device *mmio_dev;
return X86EMUL_CONTINUE;
}
+static int emulator_write_emulated(unsigned long addr,
+ const void *val,
+ unsigned int bytes,
+ struct x86_emulate_ctxt *ctxt)
+{
+ /* Crossing a page boundary? */
+ if (((addr + bytes - 1) ^ addr) & PAGE_MASK) {
+ int rc, now;
+
+ now = -addr & ~PAGE_MASK;
+ rc = emulator_write_emulated_onepage(addr, val, now, ctxt);
+ if (rc != X86EMUL_CONTINUE)
+ return rc;
+ addr += now;
+ val += now;
+ bytes -= now;
+ }
+ return emulator_write_emulated_onepage(addr, val, bytes, ctxt);
+}
+
static int emulator_cmpxchg_emulated(unsigned long addr,
const void *old,
const void *new,
break;
}
}
- if (entry && (entry->edx & EFER_NX) && !(efer & EFER_NX)) {
+ if (entry && (entry->edx & (1 << 20)) && !(efer & EFER_NX)) {
entry->edx &= ~(1 << 20);
- printk(KERN_INFO ": guest NX capability removed\n");
+ printk(KERN_INFO "kvm: guest NX capability removed\n");
}
}
twobyte_insn:
switch (b) {
case 0x01: /* lgdt, lidt, lmsw */
+ /* Disable writeback. */
+ no_wb = 1;
switch (modrm_reg) {
u16 size;
unsigned long address;
obj-$(CONFIG_LGUEST) += lg.o
lg-y := core.o hypercalls.o page_tables.o interrupts_and_traps.o \
segments.o io.o lguest_user.o switcher.o
+
+Preparation Preparation!: PREFIX=P
+Guest: PREFIX=G
+Drivers: PREFIX=D
+Launcher: PREFIX=L
+Host: PREFIX=H
+Switcher: PREFIX=S
+Mastery: PREFIX=M
+Beer:
+ @for f in Preparation Guest Drivers Launcher Host Switcher Mastery; do echo "{==- $$f -==}"; make -s $$f; done; echo "{==-==}"
+Preparation Preparation! Guest Drivers Launcher Host Switcher Mastery:
+ @sh ../../Documentation/lguest/extract $(PREFIX) `find ../../* -name '*.[chS]' -wholename '*lguest*'`
--- /dev/null
+Welcome, friend reader, to lguest.
+
+Lguest is an adventure, with you, the reader, as Hero. I can't think of many
+5000-line projects which offer both such capability and glimpses of future
+potential; it is an exciting time to be delving into the source!
+
+But be warned; this is an arduous journey of several hours or more! And as we
+know, all true Heroes are driven by a Noble Goal. Thus I offer a Beer (or
+equivalent) to anyone I meet who has completed this documentation.
+
+So get comfortable and keep your wits about you (both quick and humorous).
+Along your way to the Noble Goal, you will also gain masterly insight into
+lguest, and hypervisors and x86 virtualization in general.
+
+Our Quest is in seven parts: (best read with C highlighting turned on)
+
+I) Preparation
+ - In which our potential hero is flown quickly over the landscape for a
+ taste of its scope. Suitable for the armchair coders and other such
+ persons of faint constitution.
+
+II) Guest
+ - Where we encounter the first tantalising wisps of code, and come to
+ understand the details of the life of a Guest kernel.
+
+III) Drivers
+ - Whereby the Guest finds its voice and become useful, and our
+ understanding of the Guest is completed.
+
+IV) Launcher
+ - Where we trace back to the creation of the Guest, and thus begin our
+ understanding of the Host.
+
+V) Host
+ - Where we master the Host code, through a long and tortuous journey.
+ Indeed, it is here that our hero is tested in the Bit of Despair.
+
+VI) Switcher
+ - Where our understanding of the intertwined nature of Guests and Hosts
+ is completed.
+
+VII) Mastery
+ - Where our fully fledged hero grapples with the Great Question:
+ "What next?"
+
+make Preparation!
+Rusty Russell.
-/* World's simplest hypervisor, to test paravirt_ops and show
- * unbelievers that virtualization is the future. Plus, it's fun! */
+/*P:400 This contains run_guest() which actually calls into the Host<->Guest
+ * Switcher and analyzes the return, such as determining if the Guest wants the
+ * Host to do something. This file also contains useful helper routines, and a
+ * couple of non-obvious setup and teardown pieces which were implemented after
+ * days of debugging pain. :*/
#include <linux/module.h>
#include <linux/stringify.h>
#include <linux/stddef.h>
(SWITCHER_ADDR + SHARED_SWITCHER_PAGES*PAGE_SIZE))[cpu]);
}
+/*H:010 We need to set up the Switcher at a high virtual address. Remember the
+ * Switcher is a few hundred bytes of assembler code which actually changes the
+ * CPU to run the Guest, and then changes back to the Host when a trap or
+ * interrupt happens.
+ *
+ * The Switcher code must be at the same virtual address in the Guest as the
+ * Host since it will be running as the switchover occurs.
+ *
+ * Trying to map memory at a particular address is an unusual thing to do, so
+ * it's not a simple one-liner. We also set up the per-cpu parts of the
+ * Switcher here.
+ */
static __init int map_switcher(void)
{
int i, err;
struct page **pagep;
+ /*
+ * Map the Switcher in to high memory.
+ *
+ * It turns out that if we choose the address 0xFFC00000 (4MB under the
+ * top virtual address), it makes setting up the page tables really
+ * easy.
+ */
+
+ /* We allocate an array of "struct page"s. map_vm_area() wants the
+ * pages in this form, rather than just an array of pointers. */
switcher_page = kmalloc(sizeof(switcher_page[0])*TOTAL_SWITCHER_PAGES,
GFP_KERNEL);
if (!switcher_page) {
goto out;
}
+ /* Now we actually allocate the pages. The Guest will see these pages,
+ * so we make sure they're zeroed. */
for (i = 0; i < TOTAL_SWITCHER_PAGES; i++) {
unsigned long addr = get_zeroed_page(GFP_KERNEL);
if (!addr) {
switcher_page[i] = virt_to_page(addr);
}
+ /* Now we reserve the "virtual memory area" we want: 0xFFC00000
+ * (SWITCHER_ADDR). We might not get it in theory, but in practice
+ * it's worked so far. */
switcher_vma = __get_vm_area(TOTAL_SWITCHER_PAGES * PAGE_SIZE,
VM_ALLOC, SWITCHER_ADDR, VMALLOC_END);
if (!switcher_vma) {
goto free_pages;
}
+ /* This code actually sets up the pages we've allocated to appear at
+ * SWITCHER_ADDR. map_vm_area() takes the vma we allocated above, the
+ * kind of pages we're mapping (kernel pages), and a pointer to our
+ * array of struct pages. It increments that pointer, but we don't
+ * care. */
pagep = switcher_page;
err = map_vm_area(switcher_vma, PAGE_KERNEL, &pagep);
if (err) {
printk("lguest: map_vm_area failed: %i\n", err);
goto free_vma;
}
+
+ /* Now the switcher is mapped at the right address, we can't fail!
+ * Copy in the compiled-in Switcher code (from switcher.S). */
memcpy(switcher_vma->addr, start_switcher_text,
end_switcher_text - start_switcher_text);
- /* Fix up IDT entries to point into copied text. */
+ /* Most of the switcher.S doesn't care that it's been moved; on Intel,
+ * jumps are relative, and it doesn't access any references to external
+ * code or data.
+ *
+ * The only exception is the interrupt handlers in switcher.S: their
+ * addresses are placed in a table (default_idt_entries), so we need to
+ * update the table with the new addresses. switcher_offset() is a
+ * convenience function which returns the distance between the builtin
+ * switcher code and the high-mapped copy we just made. */
for (i = 0; i < IDT_ENTRIES; i++)
default_idt_entries[i] += switcher_offset();
+ /*
+ * Set up the Switcher's per-cpu areas.
+ *
+ * Each CPU gets two pages of its own within the high-mapped region
+ * (aka. "struct lguest_pages"). Much of this can be initialized now,
+ * but some depends on what Guest we are running (which is set up in
+ * copy_in_guest_info()).
+ */
for_each_possible_cpu(i) {
+ /* lguest_pages() returns this CPU's two pages. */
struct lguest_pages *pages = lguest_pages(i);
+ /* This is a convenience pointer to make the code fit one
+ * statement to a line. */
struct lguest_ro_state *state = &pages->state;
- /* These fields are static: rest done in copy_in_guest_info */
+ /* The Global Descriptor Table: the Host has a different one
+ * for each CPU. We keep a descriptor for the GDT which says
+ * where it is and how big it is (the size is actually the last
+ * byte, not the size, hence the "-1"). */
state->host_gdt_desc.size = GDT_SIZE-1;
state->host_gdt_desc.address = (long)get_cpu_gdt_table(i);
+
+ /* All CPUs on the Host use the same Interrupt Descriptor
+ * Table, so we just use store_idt(), which gets this CPU's IDT
+ * descriptor. */
store_idt(&state->host_idt_desc);
+
+ /* The descriptors for the Guest's GDT and IDT can be filled
+ * out now, too. We copy the GDT & IDT into ->guest_gdt and
+ * ->guest_idt before actually running the Guest. */
state->guest_idt_desc.size = sizeof(state->guest_idt)-1;
state->guest_idt_desc.address = (long)&state->guest_idt;
state->guest_gdt_desc.size = sizeof(state->guest_gdt)-1;
state->guest_gdt_desc.address = (long)&state->guest_gdt;
+
+ /* We know where we want the stack to be when the Guest enters
+ * the switcher: in pages->regs. The stack grows upwards, so
+ * we start it at the end of that structure. */
state->guest_tss.esp0 = (long)(&pages->regs + 1);
+ /* And this is the GDT entry to use for the stack: we keep a
+ * couple of special LGUEST entries. */
state->guest_tss.ss0 = LGUEST_DS;
- /* No I/O for you! */
+
+ /* x86 can have a finegrained bitmap which indicates what I/O
+ * ports the process can use. We set it to the end of our
+ * structure, meaning "none". */
state->guest_tss.io_bitmap_base = sizeof(state->guest_tss);
+
+ /* Some GDT entries are the same across all Guests, so we can
+ * set them up now. */
setup_default_gdt_entries(state);
+ /* Most IDT entries are the same for all Guests, too.*/
setup_default_idt_entries(state, default_idt_entries);
- /* Setup LGUEST segments on all cpus */
+ /* The Host needs to be able to use the LGUEST segments on this
+ * CPU, too, so put them in the Host GDT. */
get_cpu_gdt_table(i)[GDT_ENTRY_LGUEST_CS] = FULL_EXEC_SEGMENT;
get_cpu_gdt_table(i)[GDT_ENTRY_LGUEST_DS] = FULL_SEGMENT;
}
- /* Initialize entry point into switcher. */
+ /* In the Switcher, we want the %cs segment register to use the
+ * LGUEST_CS GDT entry: we've put that in the Host and Guest GDTs, so
+ * it will be undisturbed when we switch. To change %cs and jump we
+ * need this structure to feed to Intel's "lcall" instruction. */
lguest_entry.offset = (long)switch_to_guest + switcher_offset();
lguest_entry.segment = LGUEST_CS;
printk(KERN_INFO "lguest: mapped switcher at %p\n",
switcher_vma->addr);
+ /* And we succeeded... */
return 0;
free_vma:
out:
return err;
}
+/*:*/
+/* Cleaning up the mapping when the module is unloaded is almost...
+ * too easy. */
static void unmap_switcher(void)
{
unsigned int i;
+ /* vunmap() undoes *both* map_vm_area() and __get_vm_area(). */
vunmap(switcher_vma->addr);
+ /* Now we just need to free the pages we copied the switcher into */
for (i = 0; i < TOTAL_SWITCHER_PAGES; i++)
__free_pages(switcher_page[i], 0);
}
-/* IN/OUT insns: enough to get us past boot-time probing. */
+/*H:130 Our Guest is usually so well behaved; it never tries to do things it
+ * isn't allowed to. Unfortunately, "struct paravirt_ops" isn't quite
+ * complete, because it doesn't contain replacements for the Intel I/O
+ * instructions. As a result, the Guest sometimes fumbles across one during
+ * the boot process as it probes for various things which are usually attached
+ * to a PC.
+ *
+ * When the Guest uses one of these instructions, we get trap #13 (General
+ * Protection Fault) and come here. We see if it's one of those troublesome
+ * instructions and skip over it. We return true if we did. */
static int emulate_insn(struct lguest *lg)
{
u8 insn;
unsigned int insnlen = 0, in = 0, shift = 0;
+ /* The eip contains the *virtual* address of the Guest's instruction:
+ * guest_pa just subtracts the Guest's page_offset. */
unsigned long physaddr = guest_pa(lg, lg->regs->eip);
- /* This only works for addresses in linear mapping... */
+ /* The guest_pa() function only works for Guest kernel addresses, but
+ * that's all we're trying to do anyway. */
if (lg->regs->eip < lg->page_offset)
return 0;
+
+ /* Decoding x86 instructions is icky. */
lgread(lg, &insn, physaddr, 1);
- /* Operand size prefix means it's actually for ax. */
+ /* 0x66 is an "operand prefix". It means it's using the upper 16 bits
+ of the eax register. */
if (insn == 0x66) {
shift = 16;
+ /* The instruction is 1 byte so far, read the next byte. */
insnlen = 1;
lgread(lg, &insn, physaddr + insnlen, 1);
}
+ /* We can ignore the lower bit for the moment and decode the 4 opcodes
+ * we need to emulate. */
switch (insn & 0xFE) {
case 0xE4: /* in <next byte>,%al */
insnlen += 2;
insnlen += 1;
break;
default:
+ /* OK, we don't know what this is, can't emulate. */
return 0;
}
+ /* If it was an "IN" instruction, they expect the result to be read
+ * into %eax, so we change %eax. We always return all-ones, which
+ * traditionally means "there's nothing there". */
if (in) {
/* Lower bit tells is whether it's a 16 or 32 bit access */
if (insn & 0x1)
else
lg->regs->eax |= (0xFFFF << shift);
}
+ /* Finally, we've "done" the instruction, so move past it. */
lg->regs->eip += insnlen;
+ /* Success! */
return 1;
}
-
+/*:*/
+
+/*L:305
+ * Dealing With Guest Memory.
+ *
+ * When the Guest gives us (what it thinks is) a physical address, we can use
+ * the normal copy_from_user() & copy_to_user() on that address: remember,
+ * Guest physical == Launcher virtual.
+ *
+ * But we can't trust the Guest: it might be trying to access the Launcher
+ * code. We have to check that the range is below the pfn_limit the Launcher
+ * gave us. We have to make sure that addr + len doesn't give us a false
+ * positive by overflowing, too. */
int lguest_address_ok(const struct lguest *lg,
unsigned long addr, unsigned long len)
{
return (addr+len) / PAGE_SIZE < lg->pfn_limit && (addr+len >= addr);
}
-/* Just like get_user, but don't let guest access lguest binary. */
+/* This is a convenient routine to get a 32-bit value from the Guest (a very
+ * common operation). Here we can see how useful the kill_lguest() routine we
+ * met in the Launcher can be: we return a random value (0) instead of needing
+ * to return an error. */
u32 lgread_u32(struct lguest *lg, unsigned long addr)
{
u32 val = 0;
- /* Don't let them access lguest binary */
+ /* Don't let them access lguest binary. */
if (!lguest_address_ok(lg, addr, sizeof(val))
|| get_user(val, (u32 __user *)addr) != 0)
kill_guest(lg, "bad read address %#lx", addr);
return val;
}
+/* Same thing for writing a value. */
void lgwrite_u32(struct lguest *lg, unsigned long addr, u32 val)
{
if (!lguest_address_ok(lg, addr, sizeof(val))
kill_guest(lg, "bad write address %#lx", addr);
}
+/* This routine is more generic, and copies a range of Guest bytes into a
+ * buffer. If the copy_from_user() fails, we fill the buffer with zeroes, so
+ * the caller doesn't end up using uninitialized kernel memory. */
void lgread(struct lguest *lg, void *b, unsigned long addr, unsigned bytes)
{
if (!lguest_address_ok(lg, addr, bytes)
}
}
+/* Similarly, our generic routine to copy into a range of Guest bytes. */
void lgwrite(struct lguest *lg, unsigned long addr, const void *b,
unsigned bytes)
{
|| copy_to_user((void __user *)addr, b, bytes) != 0)
kill_guest(lg, "bad write address %#lx len %u", addr, bytes);
}
+/* (end of memory access helper routines) :*/
static void set_ts(void)
{
write_cr0(cr0|8);
}
+/*S:010
+ * We are getting close to the Switcher.
+ *
+ * Remember that each CPU has two pages which are visible to the Guest when it
+ * runs on that CPU. This has to contain the state for that Guest: we copy the
+ * state in just before we run the Guest.
+ *
+ * Each Guest has "changed" flags which indicate what has changed in the Guest
+ * since it last ran. We saw this set in interrupts_and_traps.c and
+ * segments.c.
+ */
static void copy_in_guest_info(struct lguest *lg, struct lguest_pages *pages)
{
+ /* Copying all this data can be quite expensive. We usually run the
+ * same Guest we ran last time (and that Guest hasn't run anywhere else
+ * meanwhile). If that's not the case, we pretend everything in the
+ * Guest has changed. */
if (__get_cpu_var(last_guest) != lg || lg->last_pages != pages) {
__get_cpu_var(last_guest) = lg;
lg->last_pages = pages;
lg->changed = CHANGED_ALL;
}
- /* These are pretty cheap, so we do them unconditionally. */
+ /* These copies are pretty cheap, so we do them unconditionally: */
+ /* Save the current Host top-level page directory. */
pages->state.host_cr3 = __pa(current->mm->pgd);
+ /* Set up the Guest's page tables to see this CPU's pages (and no
+ * other CPU's pages). */
map_switcher_in_guest(lg, pages);
+ /* Set up the two "TSS" members which tell the CPU what stack to use
+ * for traps which do directly into the Guest (ie. traps at privilege
+ * level 1). */
pages->state.guest_tss.esp1 = lg->esp1;
pages->state.guest_tss.ss1 = lg->ss1;
- /* Copy direct trap entries. */
+ /* Copy direct-to-Guest trap entries. */
if (lg->changed & CHANGED_IDT)
copy_traps(lg, pages->state.guest_idt, default_idt_entries);
- /* Copy all GDT entries but the TSS. */
+ /* Copy all GDT entries which the Guest can change. */
if (lg->changed & CHANGED_GDT)
copy_gdt(lg, pages->state.guest_gdt);
/* If only the TLS entries have changed, copy them. */
else if (lg->changed & CHANGED_GDT_TLS)
copy_gdt_tls(lg, pages->state.guest_gdt);
+ /* Mark the Guest as unchanged for next time. */
lg->changed = 0;
}
+/* Finally: the code to actually call into the Switcher to run the Guest. */
static void run_guest_once(struct lguest *lg, struct lguest_pages *pages)
{
+ /* This is a dummy value we need for GCC's sake. */
unsigned int clobber;
+ /* Copy the guest-specific information into this CPU's "struct
+ * lguest_pages". */
copy_in_guest_info(lg, pages);
- /* Put eflags on stack, lcall does rest: suitable for iret return. */
+ /* Now: we push the "eflags" register on the stack, then do an "lcall".
+ * This is how we change from using the kernel code segment to using
+ * the dedicated lguest code segment, as well as jumping into the
+ * Switcher.
+ *
+ * The lcall also pushes the old code segment (KERNEL_CS) onto the
+ * stack, then the address of this call. This stack layout happens to
+ * exactly match the stack of an interrupt... */
asm volatile("pushf; lcall *lguest_entry"
+ /* This is how we tell GCC that %eax ("a") and %ebx ("b")
+ * are changed by this routine. The "=" means output. */
: "=a"(clobber), "=b"(clobber)
+ /* %eax contains the pages pointer. ("0" refers to the
+ * 0-th argument above, ie "a"). %ebx contains the
+ * physical address of the Guest's top-level page
+ * directory. */
: "0"(pages), "1"(__pa(lg->pgdirs[lg->pgdidx].pgdir))
+ /* We tell gcc that all these registers could change,
+ * which means we don't have to save and restore them in
+ * the Switcher. */
: "memory", "%edx", "%ecx", "%edi", "%esi");
}
+/*:*/
+/*H:030 Let's jump straight to the the main loop which runs the Guest.
+ * Remember, this is called by the Launcher reading /dev/lguest, and we keep
+ * going around and around until something interesting happens. */
int run_guest(struct lguest *lg, unsigned long __user *user)
{
+ /* We stop running once the Guest is dead. */
while (!lg->dead) {
+ /* We need to initialize this, otherwise gcc complains. It's
+ * not (yet) clever enough to see that it's initialized when we
+ * need it. */
unsigned int cr2 = 0; /* Damn gcc */
- /* Hypercalls first: we might have been out to userspace */
+ /* First we run any hypercalls the Guest wants done: either in
+ * the hypercall ring in "struct lguest_data", or directly by
+ * using int 31 (LGUEST_TRAP_ENTRY). */
do_hypercalls(lg);
+ /* It's possible the Guest did a SEND_DMA hypercall to the
+ * Launcher, in which case we return from the read() now. */
if (lg->dma_is_pending) {
if (put_user(lg->pending_dma, user) ||
put_user(lg->pending_key, user+1))
return sizeof(unsigned long)*2;
}
+ /* Check for signals */
if (signal_pending(current))
return -ERESTARTSYS;
if (lg->break_out)
return -EAGAIN;
+ /* Check if there are any interrupts which can be delivered
+ * now: if so, this sets up the hander to be executed when we
+ * next run the Guest. */
maybe_do_interrupt(lg);
+ /* All long-lived kernel loops need to check with this horrible
+ * thing called the freezer. If the Host is trying to suspend,
+ * it stops us. */
try_to_freeze();
+ /* Just make absolutely sure the Guest is still alive. One of
+ * those hypercalls could have been fatal, for example. */
if (lg->dead)
break;
+ /* If the Guest asked to be stopped, we sleep. The Guest's
+ * clock timer or LHCALL_BREAK from the Waker will wake us. */
if (lg->halted) {
set_current_state(TASK_INTERRUPTIBLE);
schedule();
continue;
}
+ /* OK, now we're ready to jump into the Guest. First we put up
+ * the "Do Not Disturb" sign: */
local_irq_disable();
- /* Even if *we* don't want FPU trap, guest might... */
+ /* Remember the awfully-named TS bit? If the Guest has asked
+ * to set it we set it now, so we can trap and pass that trap
+ * to the Guest if it uses the FPU. */
if (lg->ts)
set_ts();
- /* Don't let Guest do SYSENTER: we can't handle it. */
+ /* SYSENTER is an optimized way of doing system calls. We
+ * can't allow it because it always jumps to privilege level 0.
+ * A normal Guest won't try it because we don't advertise it in
+ * CPUID, but a malicious Guest (or malicious Guest userspace
+ * program) could, so we tell the CPU to disable it before
+ * running the Guest. */
if (boot_cpu_has(X86_FEATURE_SEP))
wrmsr(MSR_IA32_SYSENTER_CS, 0, 0);
+ /* Now we actually run the Guest. It will pop back out when
+ * something interesting happens, and we can examine its
+ * registers to see what it was doing. */
run_guest_once(lg, lguest_pages(raw_smp_processor_id()));
- /* Save cr2 now if we page-faulted. */
+ /* The "regs" pointer contains two extra entries which are not
+ * really registers: a trap number which says what interrupt or
+ * trap made the switcher code come back, and an error code
+ * which some traps set. */
+
+ /* If the Guest page faulted, then the cr2 register will tell
+ * us the bad virtual address. We have to grab this now,
+ * because once we re-enable interrupts an interrupt could
+ * fault and thus overwrite cr2, or we could even move off to a
+ * different CPU. */
if (lg->regs->trapnum == 14)
cr2 = read_cr2();
+ /* Similarly, if we took a trap because the Guest used the FPU,
+ * we have to restore the FPU it expects to see. */
else if (lg->regs->trapnum == 7)
math_state_restore();
+ /* Restore SYSENTER if it's supposed to be on. */
if (boot_cpu_has(X86_FEATURE_SEP))
wrmsr(MSR_IA32_SYSENTER_CS, __KERNEL_CS, 0);
+
+ /* Now we're ready to be interrupted or moved to other CPUs */
local_irq_enable();
+ /* OK, so what happened? */
switch (lg->regs->trapnum) {
case 13: /* We've intercepted a GPF. */
+ /* Check if this was one of those annoying IN or OUT
+ * instructions which we need to emulate. If so, we
+ * just go back into the Guest after we've done it. */
if (lg->regs->errcode == 0) {
if (emulate_insn(lg))
continue;
}
break;
case 14: /* We've intercepted a page fault. */
+ /* The Guest accessed a virtual address that wasn't
+ * mapped. This happens a lot: we don't actually set
+ * up most of the page tables for the Guest at all when
+ * we start: as it runs it asks for more and more, and
+ * we set them up as required. In this case, we don't
+ * even tell the Guest that the fault happened.
+ *
+ * The errcode tells whether this was a read or a
+ * write, and whether kernel or userspace code. */
if (demand_page(lg, cr2, lg->regs->errcode))
continue;
- /* If lguest_data is NULL, this won't hurt. */
+ /* OK, it's really not there (or not OK): the Guest
+ * needs to know. We write out the cr2 value so it
+ * knows where the fault occurred.
+ *
+ * Note that if the Guest were really messed up, this
+ * could happen before it's done the INITIALIZE
+ * hypercall, so lg->lguest_data will be NULL, so
+ * &lg->lguest_data->cr2 will be address 8. Writing
+ * into that address won't hurt the Host at all,
+ * though. */
if (put_user(cr2, &lg->lguest_data->cr2))
kill_guest(lg, "Writing cr2");
break;
case 7: /* We've intercepted a Device Not Available fault. */
- /* If they don't want to know, just absorb it. */
+ /* If the Guest doesn't want to know, we already
+ * restored the Floating Point Unit, so we just
+ * continue without telling it. */
if (!lg->ts)
continue;
break;
- case 32 ... 255: /* Real interrupt, fall thru */
+ case 32 ... 255:
+ /* These values mean a real interrupt occurred, in
+ * which case the Host handler has already been run.
+ * We just do a friendly check if another process
+ * should now be run, then fall through to loop
+ * around: */
cond_resched();
case LGUEST_TRAP_ENTRY: /* Handled at top of loop */
continue;
}
+ /* If we get here, it's a trap the Guest wants to know
+ * about. */
if (deliver_trap(lg, lg->regs->trapnum))
continue;
+ /* If the Guest doesn't have a handler (either it hasn't
+ * registered any yet, or it's one of the faults we don't let
+ * it handle), it dies with a cryptic error message. */
kill_guest(lg, "unhandled trap %li at %#lx (%#lx)",
lg->regs->trapnum, lg->regs->eip,
lg->regs->trapnum == 14 ? cr2 : lg->regs->errcode);
}
+ /* The Guest is dead => "No such file or directory" */
return -ENOENT;
}
+/* Now we can look at each of the routines this calls, in increasing order of
+ * complexity: do_hypercalls(), emulate_insn(), maybe_do_interrupt(),
+ * deliver_trap() and demand_page(). After all those, we'll be ready to
+ * examine the Switcher, and our philosophical understanding of the Host/Guest
+ * duality will be complete. :*/
+
int find_free_guest(void)
{
unsigned int i;
write_cr4(read_cr4() & ~X86_CR4_PGE);
}
+/*H:000
+ * Welcome to the Host!
+ *
+ * By this point your brain has been tickled by the Guest code and numbed by
+ * the Launcher code; prepare for it to be stretched by the Host code. This is
+ * the heart. Let's begin at the initialization routine for the Host's lg
+ * module.
+ */
static int __init init(void)
{
int err;
+ /* Lguest can't run under Xen, VMI or itself. It does Tricky Stuff. */
if (paravirt_enabled()) {
printk("lguest is afraid of %s\n", paravirt_ops.name);
return -EPERM;
}
+ /* First we put the Switcher up in very high virtual memory. */
err = map_switcher();
if (err)
return err;
+ /* Now we set up the pagetable implementation for the Guests. */
err = init_pagetables(switcher_page, SHARED_SWITCHER_PAGES);
if (err) {
unmap_switcher();
return err;
}
+
+ /* The I/O subsystem needs some things initialized. */
lguest_io_init();
+ /* /dev/lguest needs to be registered. */
err = lguest_device_init();
if (err) {
free_pagetables();
unmap_switcher();
return err;
}
+
+ /* Finally, we need to turn off "Page Global Enable". PGE is an
+ * optimization where page table entries are specially marked to show
+ * they never change. The Host kernel marks all the kernel pages this
+ * way because it's always present, even when userspace is running.
+ *
+ * Lguest breaks this: unbeknownst to the rest of the Host kernel, we
+ * switch to the Guest kernel. If you don't disable this on all CPUs,
+ * you'll get really weird bugs that you'll chase for two days.
+ *
+ * I used to turn PGE off every time we switched to the Guest and back
+ * on when we return, but that slowed the Switcher down noticibly. */
+
+ /* We don't need the complexity of CPUs coming and going while we're
+ * doing this. */
lock_cpu_hotplug();
if (cpu_has_pge) { /* We have a broader idea of "global". */
+ /* Remember that this was originally set (for cleanup). */
cpu_had_pge = 1;
+ /* adjust_pge is a helper function which sets or unsets the PGE
+ * bit on its CPU, depending on the argument (0 == unset). */
on_each_cpu(adjust_pge, (void *)0, 0, 1);
+ /* Turn off the feature in the global feature set. */
clear_bit(X86_FEATURE_PGE, boot_cpu_data.x86_capability);
}
unlock_cpu_hotplug();
+
+ /* All good! */
return 0;
}
+/* Cleaning up is just the same code, backwards. With a little French. */
static void __exit fini(void)
{
lguest_device_remove();
free_pagetables();
unmap_switcher();
+
+ /* If we had PGE before we started, turn it back on now. */
lock_cpu_hotplug();
if (cpu_had_pge) {
set_bit(X86_FEATURE_PGE, boot_cpu_data.x86_capability);
+ /* adjust_pge's argument "1" means set PGE. */
on_each_cpu(adjust_pge, (void *)1, 0, 1);
}
unlock_cpu_hotplug();
}
+/* The Host side of lguest can be a module. This is a nice way for people to
+ * play with it. */
module_init(init);
module_exit(fini);
MODULE_LICENSE("GPL");
-/* Actual hypercalls, which allow guests to actually do something.
- Copyright (C) 2006 Rusty Russell IBM Corporation
+/*P:500 Just as userspace programs request kernel operations through a system
+ * call, the Guest requests Host operations through a "hypercall". You might
+ * notice this nomenclature doesn't really follow any logic, but the name has
+ * been around for long enough that we're stuck with it. As you'd expect, this
+ * code is basically a one big switch statement. :*/
+
+/* Copyright (C) 2006 Rusty Russell IBM Corporation
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
#include <irq_vectors.h>
#include "lg.h"
+/*H:120 This is the core hypercall routine: where the Guest gets what it
+ * wants. Or gets killed. Or, in the case of LHCALL_CRASH, both.
+ *
+ * Remember from the Guest: %eax == which call to make, and the arguments are
+ * packed into %edx, %ebx and %ecx if needed. */
static void do_hcall(struct lguest *lg, struct lguest_regs *regs)
{
switch (regs->eax) {
case LHCALL_FLUSH_ASYNC:
+ /* This call does nothing, except by breaking out of the Guest
+ * it makes us process all the asynchronous hypercalls. */
break;
case LHCALL_LGUEST_INIT:
+ /* You can't get here unless you're already initialized. Don't
+ * do that. */
kill_guest(lg, "already have lguest_data");
break;
case LHCALL_CRASH: {
+ /* Crash is such a trivial hypercall that we do it in four
+ * lines right here. */
char msg[128];
+ /* If the lgread fails, it will call kill_guest() itself; the
+ * kill_guest() with the message will be ignored. */
lgread(lg, msg, regs->edx, sizeof(msg));
msg[sizeof(msg)-1] = '\0';
kill_guest(lg, "CRASH: %s", msg);
break;
}
case LHCALL_FLUSH_TLB:
+ /* FLUSH_TLB comes in two flavors, depending on the
+ * argument: */
if (regs->edx)
guest_pagetable_clear_all(lg);
else
guest_pagetable_flush_user(lg);
break;
case LHCALL_GET_WALLCLOCK: {
+ /* The Guest wants to know the real time in seconds since 1970,
+ * in good Unix tradition. */
struct timespec ts;
ktime_get_real_ts(&ts);
regs->eax = ts.tv_sec;
break;
}
case LHCALL_BIND_DMA:
+ /* BIND_DMA really wants four arguments, but it's the only call
+ * which does. So the Guest packs the number of buffers and
+ * the interrupt number into the final argument, and we decode
+ * it here. This can legitimately fail, since we currently
+ * place a limit on the number of DMA pools a Guest can have.
+ * So we return true or false from this call. */
regs->eax = bind_dma(lg, regs->edx, regs->ebx,
regs->ecx >> 8, regs->ecx & 0xFF);
break;
+
+ /* All these calls simply pass the arguments through to the right
+ * routines. */
case LHCALL_SEND_DMA:
send_dma(lg, regs->edx, regs->ebx);
break;
case LHCALL_SET_CLOCKEVENT:
guest_set_clockevent(lg, regs->edx);
break;
+
case LHCALL_TS:
+ /* This sets the TS flag, as we saw used in run_guest(). */
lg->ts = regs->edx;
break;
case LHCALL_HALT:
+ /* Similarly, this sets the halted flag for run_guest(). */
lg->halted = 1;
break;
default:
}
}
-/* We always do queued calls before actual hypercall. */
+/* Asynchronous hypercalls are easy: we just look in the array in the Guest's
+ * "struct lguest_data" and see if there are any new ones marked "ready".
+ *
+ * We are careful to do these in order: obviously we respect the order the
+ * Guest put them in the ring, but we also promise the Guest that they will
+ * happen before any normal hypercall (which is why we check this before
+ * checking for a normal hcall). */
static void do_async_hcalls(struct lguest *lg)
{
unsigned int i;
u8 st[LHCALL_RING_SIZE];
+ /* For simplicity, we copy the entire call status array in at once. */
if (copy_from_user(&st, &lg->lguest_data->hcall_status, sizeof(st)))
return;
+
+ /* We process "struct lguest_data"s hcalls[] ring once. */
for (i = 0; i < ARRAY_SIZE(st); i++) {
struct lguest_regs regs;
+ /* We remember where we were up to from last time. This makes
+ * sure that the hypercalls are done in the order the Guest
+ * places them in the ring. */
unsigned int n = lg->next_hcall;
+ /* 0xFF means there's no call here (yet). */
if (st[n] == 0xFF)
break;
+ /* OK, we have hypercall. Increment the "next_hcall" cursor,
+ * and wrap back to 0 if we reach the end. */
if (++lg->next_hcall == LHCALL_RING_SIZE)
lg->next_hcall = 0;
+ /* We copy the hypercall arguments into a fake register
+ * structure. This makes life simple for do_hcall(). */
if (get_user(regs.eax, &lg->lguest_data->hcalls[n].eax)
|| get_user(regs.edx, &lg->lguest_data->hcalls[n].edx)
|| get_user(regs.ecx, &lg->lguest_data->hcalls[n].ecx)
break;
}
+ /* Do the hypercall, same as a normal one. */
do_hcall(lg, ®s);
+
+ /* Mark the hypercall done. */
if (put_user(0xFF, &lg->lguest_data->hcall_status[n])) {
kill_guest(lg, "Writing result for async hypercall");
break;
}
+ /* Stop doing hypercalls if we've just done a DMA to the
+ * Launcher: it needs to service this first. */
if (lg->dma_is_pending)
break;
}
}
+/* Last of all, we look at what happens first of all. The very first time the
+ * Guest makes a hypercall, we end up here to set things up: */
static void initialize(struct lguest *lg)
{
u32 tsc_speed;
+ /* You can't do anything until you're initialized. The Guest knows the
+ * rules, so we're unforgiving here. */
if (lg->regs->eax != LHCALL_LGUEST_INIT) {
kill_guest(lg, "hypercall %li before LGUEST_INIT",
lg->regs->eax);
return;
}
- /* We only tell the guest to use the TSC if it's reliable. */
+ /* We insist that the Time Stamp Counter exist and doesn't change with
+ * cpu frequency. Some devious chip manufacturers decided that TSC
+ * changes could be handled in software. I decided that time going
+ * backwards might be good for benchmarks, but it's bad for users.
+ *
+ * We also insist that the TSC be stable: the kernel detects unreliable
+ * TSCs for its own purposes, and we use that here. */
if (boot_cpu_has(X86_FEATURE_CONSTANT_TSC) && !check_tsc_unstable())
tsc_speed = tsc_khz;
else
tsc_speed = 0;
+ /* The pointer to the Guest's "struct lguest_data" is the only
+ * argument. */
lg->lguest_data = (struct lguest_data __user *)lg->regs->edx;
- /* We check here so we can simply copy_to_user/from_user */
+ /* If we check the address they gave is OK now, we can simply
+ * copy_to_user/from_user from now on rather than using lgread/lgwrite.
+ * I put this in to show that I'm not immune to writing stupid
+ * optimizations. */
if (!lguest_address_ok(lg, lg->regs->edx, sizeof(*lg->lguest_data))) {
kill_guest(lg, "bad guest page %p", lg->lguest_data);
return;
}
+ /* The Guest tells us where we're not to deliver interrupts by putting
+ * the range of addresses into "struct lguest_data". */
if (get_user(lg->noirq_start, &lg->lguest_data->noirq_start)
|| get_user(lg->noirq_end, &lg->lguest_data->noirq_end)
- /* We reserve the top pgd entry. */
+ /* We tell the Guest that it can't use the top 4MB of virtual
+ * addresses used by the Switcher. */
|| put_user(4U*1024*1024, &lg->lguest_data->reserve_mem)
|| put_user(tsc_speed, &lg->lguest_data->tsc_khz)
+ /* We also give the Guest a unique id, as used in lguest_net.c. */
|| put_user(lg->guestid, &lg->lguest_data->guestid))
kill_guest(lg, "bad guest page %p", lg->lguest_data);
- /* This is the one case where the above accesses might have
- * been the first write to a Guest page. This may have caused
- * a copy-on-write fault, but the Guest might be referring to
- * the old (read-only) page. */
+ /* This is the one case where the above accesses might have been the
+ * first write to a Guest page. This may have caused a copy-on-write
+ * fault, but the Guest might be referring to the old (read-only)
+ * page. */
guest_pagetable_clear_all(lg);
}
+/* Now we've examined the hypercall code; our Guest can make requests. There
+ * is one other way we can do things for the Guest, as we see in
+ * emulate_insn(). */
-/* Even if we go out to userspace and come back, we don't want to do
- * the hypercall again. */
+/*H:110 Tricky point: we mark the hypercall as "done" once we've done it.
+ * Normally we don't need to do this: the Guest will run again and update the
+ * trap number before we come back around the run_guest() loop to
+ * do_hypercalls().
+ *
+ * However, if we are signalled or the Guest sends DMA to the Launcher, that
+ * loop will exit without running the Guest. When it comes back it would try
+ * to re-run the hypercall. */
static void clear_hcall(struct lguest *lg)
{
lg->regs->trapnum = 255;
}
+/*H:100
+ * Hypercalls
+ *
+ * Remember from the Guest, hypercalls come in two flavors: normal and
+ * asynchronous. This file handles both of types.
+ */
void do_hypercalls(struct lguest *lg)
{
+ /* Not initialized yet? */
if (unlikely(!lg->lguest_data)) {
+ /* Did the Guest make a hypercall? We might have come back for
+ * some other reason (an interrupt, a different trap). */
if (lg->regs->trapnum == LGUEST_TRAP_ENTRY) {
+ /* Set up the "struct lguest_data" */
initialize(lg);
+ /* The hypercall is done. */
clear_hcall(lg);
}
return;
}
+ /* The Guest has initialized.
+ *
+ * Look in the hypercall ring for the async hypercalls: */
do_async_hcalls(lg);
+
+ /* If we stopped reading the hypercall ring because the Guest did a
+ * SEND_DMA to the Launcher, we want to return now. Otherwise if the
+ * Guest asked us to do a hypercall, we do it. */
if (!lg->dma_is_pending && lg->regs->trapnum == LGUEST_TRAP_ENTRY) {
do_hcall(lg, lg->regs);
+ /* The hypercall is done. */
clear_hcall(lg);
}
}
+/*P:800 Interrupts (traps) are complicated enough to earn their own file.
+ * There are three classes of interrupts:
+ *
+ * 1) Real hardware interrupts which occur while we're running the Guest,
+ * 2) Interrupts for virtual devices attached to the Guest, and
+ * 3) Traps and faults from the Guest.
+ *
+ * Real hardware interrupts must be delivered to the Host, not the Guest.
+ * Virtual interrupts must be delivered to the Guest, but we make them look
+ * just like real hardware would deliver them. Traps from the Guest can be set
+ * up to go directly back into the Guest, but sometimes the Host wants to see
+ * them first, so we also have a way of "reflecting" them into the Guest as if
+ * they had been delivered to it directly. :*/
#include <linux/uaccess.h>
#include "lg.h"
+/* The address of the interrupt handler is split into two bits: */
static unsigned long idt_address(u32 lo, u32 hi)
{
return (lo & 0x0000FFFF) | (hi & 0xFFFF0000);
}
+/* The "type" of the interrupt handler is a 4 bit field: we only support a
+ * couple of types. */
static int idt_type(u32 lo, u32 hi)
{
return (hi >> 8) & 0xF;
}
+/* An IDT entry can't be used unless the "present" bit is set. */
static int idt_present(u32 lo, u32 hi)
{
return (hi & 0x8000);
}
+/* We need a helper to "push" a value onto the Guest's stack, since that's a
+ * big part of what delivering an interrupt does. */
static void push_guest_stack(struct lguest *lg, unsigned long *gstack, u32 val)
{
+ /* Stack grows upwards: move stack then write value. */
*gstack -= 4;
lgwrite_u32(lg, *gstack, val);
}
+/*H:210 The set_guest_interrupt() routine actually delivers the interrupt or
+ * trap. The mechanics of delivering traps and interrupts to the Guest are the
+ * same, except some traps have an "error code" which gets pushed onto the
+ * stack as well: the caller tells us if this is one.
+ *
+ * "lo" and "hi" are the two parts of the Interrupt Descriptor Table for this
+ * interrupt or trap. It's split into two parts for traditional reasons: gcc
+ * on i386 used to be frightened by 64 bit numbers.
+ *
+ * We set up the stack just like the CPU does for a real interrupt, so it's
+ * identical for the Guest (and the standard "iret" instruction will undo
+ * it). */
static void set_guest_interrupt(struct lguest *lg, u32 lo, u32 hi, int has_err)
{
unsigned long gstack;
u32 eflags, ss, irq_enable;
- /* If they want a ring change, we use new stack and push old ss/esp */
+ /* There are two cases for interrupts: one where the Guest is already
+ * in the kernel, and a more complex one where the Guest is in
+ * userspace. We check the privilege level to find out. */
if ((lg->regs->ss&0x3) != GUEST_PL) {
+ /* The Guest told us their kernel stack with the SET_STACK
+ * hypercall: both the virtual address and the segment */
gstack = guest_pa(lg, lg->esp1);
ss = lg->ss1;
+ /* We push the old stack segment and pointer onto the new
+ * stack: when the Guest does an "iret" back from the interrupt
+ * handler the CPU will notice they're dropping privilege
+ * levels and expect these here. */
push_guest_stack(lg, &gstack, lg->regs->ss);
push_guest_stack(lg, &gstack, lg->regs->esp);
} else {
+ /* We're staying on the same Guest (kernel) stack. */
gstack = guest_pa(lg, lg->regs->esp);
ss = lg->regs->ss;
}
- /* We use IF bit in eflags to indicate whether irqs were enabled
- (it's always 1, since irqs are enabled when guest is running). */
+ /* Remember that we never let the Guest actually disable interrupts, so
+ * the "Interrupt Flag" bit is always set. We copy that bit from the
+ * Guest's "irq_enabled" field into the eflags word: the Guest copies
+ * it back in "lguest_iret". */
eflags = lg->regs->eflags;
if (get_user(irq_enable, &lg->lguest_data->irq_enabled) == 0
&& !(irq_enable & X86_EFLAGS_IF))
eflags &= ~X86_EFLAGS_IF;
+ /* An interrupt is expected to push three things on the stack: the old
+ * "eflags" word, the old code segment, and the old instruction
+ * pointer. */
push_guest_stack(lg, &gstack, eflags);
push_guest_stack(lg, &gstack, lg->regs->cs);
push_guest_stack(lg, &gstack, lg->regs->eip);
+ /* For the six traps which supply an error code, we push that, too. */
if (has_err)
push_guest_stack(lg, &gstack, lg->regs->errcode);
- /* Change the real stack so switcher returns to trap handler */
+ /* Now we've pushed all the old state, we change the stack, the code
+ * segment and the address to execute. */
lg->regs->ss = ss;
lg->regs->esp = gstack + lg->page_offset;
lg->regs->cs = (__KERNEL_CS|GUEST_PL);
lg->regs->eip = idt_address(lo, hi);
- /* Disable interrupts for an interrupt gate. */
+ /* There are two kinds of interrupt handlers: 0xE is an "interrupt
+ * gate" which expects interrupts to be disabled on entry. */
if (idt_type(lo, hi) == 0xE)
if (put_user(0, &lg->lguest_data->irq_enabled))
kill_guest(lg, "Disabling interrupts");
}
+/*H:200
+ * Virtual Interrupts.
+ *
+ * maybe_do_interrupt() gets called before every entry to the Guest, to see if
+ * we should divert the Guest to running an interrupt handler. */
void maybe_do_interrupt(struct lguest *lg)
{
unsigned int irq;
DECLARE_BITMAP(blk, LGUEST_IRQS);
struct desc_struct *idt;
+ /* If the Guest hasn't even initialized yet, we can do nothing. */
if (!lg->lguest_data)
return;
- /* Mask out any interrupts they have blocked. */
+ /* Take our "irqs_pending" array and remove any interrupts the Guest
+ * wants blocked: the result ends up in "blk". */
if (copy_from_user(&blk, lg->lguest_data->blocked_interrupts,
sizeof(blk)))
return;
bitmap_andnot(blk, lg->irqs_pending, blk, LGUEST_IRQS);
+ /* Find the first interrupt. */
irq = find_first_bit(blk, LGUEST_IRQS);
+ /* None? Nothing to do */
if (irq >= LGUEST_IRQS)
return;
+ /* They may be in the middle of an iret, where they asked us never to
+ * deliver interrupts. */
if (lg->regs->eip >= lg->noirq_start && lg->regs->eip < lg->noirq_end)
return;
- /* If they're halted, we re-enable interrupts. */
+ /* If they're halted, interrupts restart them. */
if (lg->halted) {
/* Re-enable interrupts. */
if (put_user(X86_EFLAGS_IF, &lg->lguest_data->irq_enabled))
kill_guest(lg, "Re-enabling interrupts");
lg->halted = 0;
} else {
- /* Maybe they have interrupts disabled? */
+ /* Otherwise we check if they have interrupts disabled. */
u32 irq_enabled;
if (get_user(irq_enabled, &lg->lguest_data->irq_enabled))
irq_enabled = 0;
return;
}
+ /* Look at the IDT entry the Guest gave us for this interrupt. The
+ * first 32 (FIRST_EXTERNAL_VECTOR) entries are for traps, so we skip
+ * over them. */
idt = &lg->idt[FIRST_EXTERNAL_VECTOR+irq];
+ /* If they don't have a handler (yet?), we just ignore it */
if (idt_present(idt->a, idt->b)) {
+ /* OK, mark it no longer pending and deliver it. */
clear_bit(irq, lg->irqs_pending);
+ /* set_guest_interrupt() takes the interrupt descriptor and a
+ * flag to say whether this interrupt pushes an error code onto
+ * the stack as well: virtual interrupts never do. */
set_guest_interrupt(lg, idt->a, idt->b, 0);
}
}
+/*H:220 Now we've got the routines to deliver interrupts, delivering traps
+ * like page fault is easy. The only trick is that Intel decided that some
+ * traps should have error codes: */
static int has_err(unsigned int trap)
{
return (trap == 8 || (trap >= 10 && trap <= 14) || trap == 17);
}
+/* deliver_trap() returns true if it could deliver the trap. */
int deliver_trap(struct lguest *lg, unsigned int num)
{
u32 lo = lg->idt[num].a, hi = lg->idt[num].b;
+ /* Early on the Guest hasn't set the IDT entries (or maybe it put a
+ * bogus one in): if we fail here, the Guest will be killed. */
if (!idt_present(lo, hi))
return 0;
set_guest_interrupt(lg, lo, hi, has_err(num));
return 1;
}
+/*H:250 Here's the hard part: returning to the Host every time a trap happens
+ * and then calling deliver_trap() and re-entering the Guest is slow.
+ * Particularly because Guest userspace system calls are traps (trap 128).
+ *
+ * So we'd like to set up the IDT to tell the CPU to deliver traps directly
+ * into the Guest. This is possible, but the complexities cause the size of
+ * this file to double! However, 150 lines of code is worth writing for taking
+ * system calls down from 1750ns to 270ns. Plus, if lguest didn't do it, all
+ * the other hypervisors would tease it.
+ *
+ * This routine determines if a trap can be delivered directly. */
static int direct_trap(const struct lguest *lg,
const struct desc_struct *trap,
unsigned int num)
{
- /* Hardware interrupts don't go to guest (except syscall). */
+ /* Hardware interrupts don't go to the Guest at all (except system
+ * call). */
if (num >= FIRST_EXTERNAL_VECTOR && num != SYSCALL_VECTOR)
return 0;
- /* We intercept page fault (demand shadow paging & cr2 saving)
- protection fault (in/out emulation) and device not
- available (TS handling), and hypercall */
+ /* The Host needs to see page faults (for shadow paging and to save the
+ * fault address), general protection faults (in/out emulation) and
+ * device not available (TS handling), and of course, the hypercall
+ * trap. */
if (num == 14 || num == 13 || num == 7 || num == LGUEST_TRAP_ENTRY)
return 0;
- /* Interrupt gates (0xE) or not present (0x0) can't go direct. */
+ /* Only trap gates (type 15) can go direct to the Guest. Interrupt
+ * gates (type 14) disable interrupts as they are entered, which we
+ * never let the Guest do. Not present entries (type 0x0) also can't
+ * go direct, of course 8) */
return idt_type(trap->a, trap->b) == 0xF;
}
-
+/*:*/
+
+/*M:005 The Guest has the ability to turn its interrupt gates into trap gates,
+ * if it is careful. The Host will let trap gates can go directly to the
+ * Guest, but the Guest needs the interrupts atomically disabled for an
+ * interrupt gate. It can do this by pointing the trap gate at instructions
+ * within noirq_start and noirq_end, where it can safely disable interrupts. */
+
+/*M:006 The Guests do not use the sysenter (fast system call) instruction,
+ * because it's hardcoded to enter privilege level 0 and so can't go direct.
+ * It's about twice as fast as the older "int 0x80" system call, so it might
+ * still be worthwhile to handle it in the Switcher and lcall down to the
+ * Guest. The sysenter semantics are hairy tho: search for that keyword in
+ * entry.S :*/
+
+/*H:260 When we make traps go directly into the Guest, we need to make sure
+ * the kernel stack is valid (ie. mapped in the page tables). Otherwise, the
+ * CPU trying to deliver the trap will fault while trying to push the interrupt
+ * words on the stack: this is called a double fault, and it forces us to kill
+ * the Guest.
+ *
+ * Which is deeply unfair, because (literally!) it wasn't the Guests' fault. */
void pin_stack_pages(struct lguest *lg)
{
unsigned int i;
+ /* Depending on the CONFIG_4KSTACKS option, the Guest can have one or
+ * two pages of stack space. */
for (i = 0; i < lg->stack_pages; i++)
+ /* The stack grows *upwards*, hence the subtraction */
pin_page(lg, lg->esp1 - i * PAGE_SIZE);
}
+/* Direct traps also mean that we need to know whenever the Guest wants to use
+ * a different kernel stack, so we can change the IDT entries to use that
+ * stack. The IDT entries expect a virtual address, so unlike most addresses
+ * the Guest gives us, the "esp" (stack pointer) value here is virtual, not
+ * physical.
+ *
+ * In Linux each process has its own kernel stack, so this happens a lot: we
+ * change stacks on each context switch. */
void guest_set_stack(struct lguest *lg, u32 seg, u32 esp, unsigned int pages)
{
- /* You cannot have a stack segment with priv level 0. */
+ /* You are not allowd have a stack segment with privilege level 0: bad
+ * Guest! */
if ((seg & 0x3) != GUEST_PL)
kill_guest(lg, "bad stack segment %i", seg);
+ /* We only expect one or two stack pages. */
if (pages > 2)
kill_guest(lg, "bad stack pages %u", pages);
+ /* Save where the stack is, and how many pages */
lg->ss1 = seg;
lg->esp1 = esp;
lg->stack_pages = pages;
+ /* Make sure the new stack pages are mapped */
pin_stack_pages(lg);
}
-/* Set up trap in IDT. */
+/* All this reference to mapping stacks leads us neatly into the other complex
+ * part of the Host: page table handling. */
+
+/*H:235 This is the routine which actually checks the Guest's IDT entry and
+ * transfers it into our entry in "struct lguest": */
static void set_trap(struct lguest *lg, struct desc_struct *trap,
unsigned int num, u32 lo, u32 hi)
{
u8 type = idt_type(lo, hi);
+ /* We zero-out a not-present entry */
if (!idt_present(lo, hi)) {
trap->a = trap->b = 0;
return;
}
+ /* We only support interrupt and trap gates. */
if (type != 0xE && type != 0xF)
kill_guest(lg, "bad IDT type %i", type);
+ /* We only copy the handler address, present bit, privilege level and
+ * type. The privilege level controls where the trap can be triggered
+ * manually with an "int" instruction. This is usually GUEST_PL,
+ * except for system calls which userspace can use. */
trap->a = ((__KERNEL_CS|GUEST_PL)<<16) | (lo&0x0000FFFF);
trap->b = (hi&0xFFFFEF00);
}
+/*H:230 While we're here, dealing with delivering traps and interrupts to the
+ * Guest, we might as well complete the picture: how the Guest tells us where
+ * it wants them to go. This would be simple, except making traps fast
+ * requires some tricks.
+ *
+ * We saw the Guest setting Interrupt Descriptor Table (IDT) entries with the
+ * LHCALL_LOAD_IDT_ENTRY hypercall before: that comes here. */
void load_guest_idt_entry(struct lguest *lg, unsigned int num, u32 lo, u32 hi)
{
- /* Guest never handles: NMI, doublefault, hypercall, spurious irq. */
+ /* Guest never handles: NMI, doublefault, spurious interrupt or
+ * hypercall. We ignore when it tries to set them. */
if (num == 2 || num == 8 || num == 15 || num == LGUEST_TRAP_ENTRY)
return;
+ /* Mark the IDT as changed: next time the Guest runs we'll know we have
+ * to copy this again. */
lg->changed |= CHANGED_IDT;
+
+ /* The IDT which we keep in "struct lguest" only contains 32 entries
+ * for the traps and LGUEST_IRQS (32) entries for interrupts. We
+ * ignore attempts to set handlers for higher interrupt numbers, except
+ * for the system call "interrupt" at 128: we have a special IDT entry
+ * for that. */
if (num < ARRAY_SIZE(lg->idt))
set_trap(lg, &lg->idt[num], num, lo, hi);
else if (num == SYSCALL_VECTOR)
set_trap(lg, &lg->syscall_idt, num, lo, hi);
}
+/* The default entry for each interrupt points into the Switcher routines which
+ * simply return to the Host. The run_guest() loop will then call
+ * deliver_trap() to bounce it back into the Guest. */
static void default_idt_entry(struct desc_struct *idt,
int trap,
const unsigned long handler)
{
+ /* A present interrupt gate. */
u32 flags = 0x8e00;
- /* They can't "int" into any of them except hypercall. */
+ /* Set the privilege level on the entry for the hypercall: this allows
+ * the Guest to use the "int" instruction to trigger it. */
if (trap == LGUEST_TRAP_ENTRY)
flags |= (GUEST_PL << 13);
+ /* Now pack it into the IDT entry in its weird format. */
idt->a = (LGUEST_CS<<16) | (handler&0x0000FFFF);
idt->b = (handler&0xFFFF0000) | flags;
}
+/* When the Guest first starts, we put default entries into the IDT. */
void setup_default_idt_entries(struct lguest_ro_state *state,
const unsigned long *def)
{
default_idt_entry(&state->guest_idt[i], i, def[i]);
}
+/*H:240 We don't use the IDT entries in the "struct lguest" directly, instead
+ * we copy them into the IDT which we've set up for Guests on this CPU, just
+ * before we run the Guest. This routine does that copy. */
void copy_traps(const struct lguest *lg, struct desc_struct *idt,
const unsigned long *def)
{
unsigned int i;
- /* All hardware interrupts are same whatever the guest: only the
- * traps might be different. */
+ /* We can simply copy the direct traps, otherwise we use the default
+ * ones in the Switcher: they will return to the Host. */
for (i = 0; i < FIRST_EXTERNAL_VECTOR; i++) {
if (direct_trap(lg, &lg->idt[i], i))
idt[i] = lg->idt[i];
else
default_idt_entry(&idt[i], i, def[i]);
}
+
+ /* Don't forget the system call trap! The IDT entries for other
+ * interupts never change, so no need to copy them. */
i = SYSCALL_VECTOR;
if (direct_trap(lg, &lg->syscall_idt, i))
idt[i] = lg->syscall_idt;
-/* Simple I/O model for guests, based on shared memory.
- * Copyright (C) 2006 Rusty Russell IBM Corporation
+/*P:300 The I/O mechanism in lguest is simple yet flexible, allowing the Guest
+ * to talk to the Launcher or directly to another Guest. It uses familiar
+ * concepts of DMA and interrupts, plus some neat code stolen from
+ * futexes... :*/
+
+/* Copyright (C) 2006 Rusty Russell IBM Corporation
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
#include <linux/uaccess.h>
#include "lg.h"
+/*L:300
+ * I/O
+ *
+ * Getting data in and out of the Guest is quite an art. There are numerous
+ * ways to do it, and they all suck differently. We try to keep things fairly
+ * close to "real" hardware so our Guest's drivers don't look like an alien
+ * visitation in the middle of the Linux code, and yet make sure that Guests
+ * can talk directly to other Guests, not just the Launcher.
+ *
+ * To do this, the Guest gives us a key when it binds or sends DMA buffers.
+ * The key corresponds to a "physical" address inside the Guest (ie. a virtual
+ * address inside the Launcher process). We don't, however, use this key
+ * directly.
+ *
+ * We want Guests which share memory to be able to DMA to each other: two
+ * Launchers can mmap memory the same file, then the Guests can communicate.
+ * Fortunately, the futex code provides us with a way to get a "union
+ * futex_key" corresponding to the memory lying at a virtual address: if the
+ * two processes share memory, the "union futex_key" for that memory will match
+ * even if the memory is mapped at different addresses in each. So we always
+ * convert the keys to "union futex_key"s to compare them.
+ *
+ * Before we dive into this though, we need to look at another set of helper
+ * routines used throughout the Host kernel code to access Guest memory.
+ :*/
static struct list_head dma_hash[61];
+/* An unfortunate side effect of the Linux double-linked list implementation is
+ * that there's no good way to statically initialize an array of linked
+ * lists. */
void lguest_io_init(void)
{
unsigned int i;
return 0;
}
+/*L:330 This is our hash function, using the wonderful Jenkins hash.
+ *
+ * The futex key is a union with three parts: an unsigned long word, a pointer,
+ * and an int "offset". We could use jhash_2words() which takes three u32s.
+ * (Ok, the hash functions are great: the naming sucks though).
+ *
+ * It's nice to be portable to 64-bit platforms, so we use the more generic
+ * jhash2(), which takes an array of u32, the number of u32s, and an initial
+ * u32 to roll in. This is uglier, but breaks down to almost the same code on
+ * 32-bit platforms like this one.
+ *
+ * We want a position in the array, so we modulo ARRAY_SIZE(dma_hash) (ie. 61).
+ */
static unsigned int hash(const union futex_key *key)
{
return jhash2((u32*)&key->both.word,
% ARRAY_SIZE(dma_hash);
}
+/* This is a convenience routine to compare two keys. It's a much bemoaned C
+ * weakness that it doesn't allow '==' on structures or unions, so we have to
+ * open-code it like this. */
static inline int key_eq(const union futex_key *a, const union futex_key *b)
{
return (a->both.word == b->both.word
&& a->both.offset == b->both.offset);
}
-/* Must hold read lock on dmainfo owner's current->mm->mmap_sem */
+/*L:360 OK, when we need to actually free up a Guest's DMA array we do several
+ * things, so we have a convenient function to do it.
+ *
+ * The caller must hold a read lock on dmainfo owner's current->mm->mmap_sem
+ * for the drop_futex_key_refs(). */
static void unlink_dma(struct lguest_dma_info *dmainfo)
{
+ /* You locked this too, right? */
BUG_ON(!mutex_is_locked(&lguest_lock));
+ /* This is how we know that the entry is free. */
dmainfo->interrupt = 0;
+ /* Remove it from the hash table. */
list_del(&dmainfo->list);
+ /* Drop the references we were holding (to the inode or mm). */
drop_futex_key_refs(&dmainfo->key);
}
+/*L:350 This is the routine which we call when the Guest asks to unregister a
+ * DMA array attached to a given key. Returns true if the array was found. */
static int unbind_dma(struct lguest *lg,
const union futex_key *key,
unsigned long dmas)
{
int i, ret = 0;
+ /* We don't bother with the hash table, just look through all this
+ * Guest's DMA arrays. */
for (i = 0; i < LGUEST_MAX_DMA; i++) {
+ /* In theory it could have more than one array on the same key,
+ * or one array on multiple keys, so we check both */
if (key_eq(key, &lg->dma[i].key) && dmas == lg->dma[i].dmas) {
unlink_dma(&lg->dma[i]);
ret = 1;
return ret;
}
+/*L:340 BIND_DMA: this is the hypercall which sets up an array of "struct
+ * lguest_dma" for receiving I/O.
+ *
+ * The Guest wants to bind an array of "struct lguest_dma"s to a particular key
+ * to receive input. This only happens when the Guest is setting up a new
+ * device, so it doesn't have to be very fast.
+ *
+ * It returns 1 on a successful registration (it can fail if we hit the limit
+ * of registrations for this Guest).
+ */
int bind_dma(struct lguest *lg,
unsigned long ukey, unsigned long dmas, u16 numdmas, u8 interrupt)
{
unsigned int i;
int ret = 0;
union futex_key key;
+ /* Futex code needs the mmap_sem. */
struct rw_semaphore *fshared = ¤t->mm->mmap_sem;
+ /* Invalid interrupt? (We could kill the guest here). */
if (interrupt >= LGUEST_IRQS)
return 0;
+ /* We need to grab the Big Lguest Lock, because other Guests may be
+ * trying to look through this Guest's DMAs to send something while
+ * we're doing this. */
mutex_lock(&lguest_lock);
down_read(fshared);
if (get_futex_key((u32 __user *)ukey, fshared, &key) != 0) {
kill_guest(lg, "bad dma key %#lx", ukey);
goto unlock;
}
+
+ /* We want to keep this key valid once we drop mmap_sem, so we have to
+ * hold a reference. */
get_futex_key_refs(&key);
+ /* If the Guest specified an interrupt of 0, that means they want to
+ * unregister this array of "struct lguest_dma"s. */
if (interrupt == 0)
ret = unbind_dma(lg, &key, dmas);
else {
+ /* Look through this Guest's dma array for an unused entry. */
for (i = 0; i < LGUEST_MAX_DMA; i++) {
+ /* If the interrupt is non-zero, the entry is already
+ * used. */
if (lg->dma[i].interrupt)
continue;
+ /* OK, a free one! Fill on our details. */
lg->dma[i].dmas = dmas;
lg->dma[i].num_dmas = numdmas;
lg->dma[i].next_dma = 0;
lg->dma[i].key = key;
lg->dma[i].guestid = lg->guestid;
lg->dma[i].interrupt = interrupt;
+
+ /* Now we add it to the hash table: the position
+ * depends on the futex key that we got. */
list_add(&lg->dma[i].list, &dma_hash[hash(&key)]);
+ /* Success! */
ret = 1;
goto unlock;
}
}
+ /* If we didn't find a slot to put the key in, drop the reference
+ * again. */
drop_futex_key_refs(&key);
unlock:
+ /* Unlock and out. */
up_read(fshared);
mutex_unlock(&lguest_lock);
return ret;
}
-/* lgread from another guest */
+/*L:385 Note that our routines to access a different Guest's memory are called
+ * lgread_other() and lgwrite_other(): these names emphasize that they are only
+ * used when the Guest is *not* the current Guest.
+ *
+ * The interface for copying from another process's memory is called
+ * access_process_vm(), with a final argument of 0 for a read, and 1 for a
+ * write.
+ *
+ * We need lgread_other() to read the destination Guest's "struct lguest_dma"
+ * array. */
static int lgread_other(struct lguest *lg,
void *buf, u32 addr, unsigned bytes)
{
return 1;
}
-/* lgwrite to another guest */
+/* "lgwrite()" to another Guest: used to update the destination "used_len" once
+ * we've transferred data into the buffer. */
static int lgwrite_other(struct lguest *lg, u32 addr,
const void *buf, unsigned bytes)
{
return 1;
}
+/*L:400 This is the generic engine which copies from a source "struct
+ * lguest_dma" from this Guest into another Guest's "struct lguest_dma". The
+ * destination Guest's pages have already been mapped, as contained in the
+ * pages array.
+ *
+ * If you're wondering if there's a nice "copy from one process to another"
+ * routine, so was I. But Linux isn't really set up to copy between two
+ * unrelated processes, so we have to write it ourselves.
+ */
static u32 copy_data(struct lguest *srclg,
const struct lguest_dma *src,
const struct lguest_dma *dst,
unsigned int totlen, si, di, srcoff, dstoff;
void *maddr = NULL;
+ /* We return the total length transferred. */
totlen = 0;
+
+ /* We keep indexes into the source and destination "struct lguest_dma",
+ * and an offset within each region. */
si = di = 0;
srcoff = dstoff = 0;
+
+ /* We loop until the source or destination is exhausted. */
while (si < LGUEST_MAX_DMA_SECTIONS && src->len[si]
&& di < LGUEST_MAX_DMA_SECTIONS && dst->len[di]) {
+ /* We can only transfer the rest of the src buffer, or as much
+ * as will fit into the destination buffer. */
u32 len = min(src->len[si] - srcoff, dst->len[di] - dstoff);
+ /* For systems using "highmem" we need to use kmap() to access
+ * the page we want. We often use the same page over and over,
+ * so rather than kmap() it on every loop, we set the maddr
+ * pointer to NULL when we need to move to the next
+ * destination page. */
if (!maddr)
maddr = kmap(pages[di]);
- /* FIXME: This is not completely portable, since
- archs do different things for copy_to_user_page. */
+ /* Copy directly from (this Guest's) source address to the
+ * destination Guest's kmap()ed buffer. Note that maddr points
+ * to the start of the page: we need to add the offset of the
+ * destination address and offset within the buffer. */
+
+ /* FIXME: This is not completely portable. I looked at
+ * copy_to_user_page(), and some arch's seem to need special
+ * flushes. x86 is fine. */
if (copy_from_user(maddr + (dst->addr[di] + dstoff)%PAGE_SIZE,
(void __user *)src->addr[si], len) != 0) {
+ /* If a copy failed, it's the source's fault. */
kill_guest(srclg, "bad address in sending DMA");
totlen = 0;
break;
}
+ /* Increment the total and src & dst offsets */
totlen += len;
srcoff += len;
dstoff += len;
+
+ /* Presumably we reached the end of the src or dest buffers: */
if (srcoff == src->len[si]) {
+ /* Move to the next buffer at offset 0 */
si++;
srcoff = 0;
}
if (dstoff == dst->len[di]) {
+ /* We need to unmap that destination page and reset
+ * maddr ready for the next one. */
kunmap(pages[di]);
maddr = NULL;
di++;
}
}
+ /* If we still had a page mapped at the end, unmap now. */
if (maddr)
kunmap(pages[di]);
return totlen;
}
-/* Src is us, ie. current. */
+/*L:390 This is how we transfer a "struct lguest_dma" from the source Guest
+ * (the current Guest which called SEND_DMA) to another Guest. */
static u32 do_dma(struct lguest *srclg, const struct lguest_dma *src,
struct lguest *dstlg, const struct lguest_dma *dst)
{
u32 ret;
struct page *pages[LGUEST_MAX_DMA_SECTIONS];
+ /* We check that both source and destination "struct lguest_dma"s are
+ * within the bounds of the source and destination Guests */
if (!check_dma_list(dstlg, dst) || !check_dma_list(srclg, src))
return 0;
- /* First get the destination pages */
+ /* We need to map the pages which correspond to each parts of
+ * destination buffer. */
for (i = 0; i < LGUEST_MAX_DMA_SECTIONS; i++) {
if (dst->len[i] == 0)
break;
+ /* get_user_pages() is a complicated function, especially since
+ * we only want a single page. But it works, and returns the
+ * number of pages. Note that we're holding the destination's
+ * mmap_sem, as get_user_pages() requires. */
if (get_user_pages(dstlg->tsk, dstlg->mm,
dst->addr[i], 1, 1, 1, pages+i, NULL)
!= 1) {
+ /* This means the destination gave us a bogus buffer */
kill_guest(dstlg, "Error mapping DMA pages");
ret = 0;
goto drop_pages;
}
}
- /* Now copy until we run out of src or dst. */
+ /* Now copy the data until we run out of src or dst. */
ret = copy_data(srclg, src, dst, pages);
drop_pages:
return ret;
}
+/*L:380 Transferring data from one Guest to another is not as simple as I'd
+ * like. We've found the "struct lguest_dma_info" bound to the same address as
+ * the send, we need to copy into it.
+ *
+ * This function returns true if the destination array was empty. */
static int dma_transfer(struct lguest *srclg,
unsigned long udma,
struct lguest_dma_info *dst)
struct lguest *dstlg;
u32 i, dma = 0;
+ /* From the "struct lguest_dma_info" we found in the hash, grab the
+ * Guest. */
dstlg = &lguests[dst->guestid];
- /* Get our dma list. */
+ /* Read in the source "struct lguest_dma" handed to SEND_DMA. */
lgread(srclg, &src_dma, udma, sizeof(src_dma));
- /* We can't deadlock against them dmaing to us, because this
- * is all under the lguest_lock. */
+ /* We need the destination's mmap_sem, and we already hold the source's
+ * mmap_sem for the futex key lookup. Normally this would suggest that
+ * we could deadlock if the destination Guest was trying to send to
+ * this source Guest at the same time, which is another reason that all
+ * I/O is done under the big lguest_lock. */
down_read(&dstlg->mm->mmap_sem);
+ /* Look through the destination DMA array for an available buffer. */
for (i = 0; i < dst->num_dmas; i++) {
+ /* We keep a "next_dma" pointer which often helps us avoid
+ * looking at lots of previously-filled entries. */
dma = (dst->next_dma + i) % dst->num_dmas;
if (!lgread_other(dstlg, &dst_dma,
dst->dmas + dma * sizeof(struct lguest_dma),
if (!dst_dma.used_len)
break;
}
+
+ /* If we found a buffer, we do the actual data copy. */
if (i != dst->num_dmas) {
unsigned long used_lenp;
unsigned int ret;
ret = do_dma(srclg, &src_dma, dstlg, &dst_dma);
- /* Put used length in src. */
+ /* Put used length in the source "struct lguest_dma"'s used_len
+ * field. It's a little tricky to figure out where that is,
+ * though. */
lgwrite_u32(srclg,
udma+offsetof(struct lguest_dma, used_len), ret);
+ /* Tranferring 0 bytes is OK if the source buffer was empty. */
if (ret == 0 && src_dma.len[0] != 0)
goto fail;
- /* Make sure destination sees contents before length. */
+ /* The destination Guest might be running on a different CPU:
+ * we have to make sure that it will see the "used_len" field
+ * change to non-zero *after* it sees the data we copied into
+ * the buffer. Hence a write memory barrier. */
wmb();
+ /* Figuring out where the destination's used_len field for this
+ * "struct lguest_dma" in the array is also a little ugly. */
used_lenp = dst->dmas
+ dma * sizeof(struct lguest_dma)
+ offsetof(struct lguest_dma, used_len);
lgwrite_other(dstlg, used_lenp, &ret, sizeof(ret));
+ /* Move the cursor for next time. */
dst->next_dma++;
}
up_read(&dstlg->mm->mmap_sem);
- /* Do this last so dst doesn't simply sleep on lock. */
+ /* We trigger the destination interrupt, even if the destination was
+ * empty and we didn't transfer anything: this gives them a chance to
+ * wake up and refill. */
set_bit(dst->interrupt, dstlg->irqs_pending);
+ /* Wake up the destination process. */
wake_up_process(dstlg->tsk);
+ /* If we passed the last "struct lguest_dma", the receive had no
+ * buffers left. */
return i == dst->num_dmas;
fail:
return 0;
}
+/*L:370 This is the counter-side to the BIND_DMA hypercall; the SEND_DMA
+ * hypercall. We find out who's listening, and send to them. */
void send_dma(struct lguest *lg, unsigned long ukey, unsigned long udma)
{
union futex_key key;
again:
mutex_lock(&lguest_lock);
down_read(fshared);
+ /* Get the futex key for the key the Guest gave us */
if (get_futex_key((u32 __user *)ukey, fshared, &key) != 0) {
kill_guest(lg, "bad sending DMA key");
goto unlock;
}
- /* Shared mapping? Look for other guests... */
+ /* Since the key must be a multiple of 4, the futex key uses the lower
+ * bit of the "offset" field (which would always be 0) to indicate a
+ * mapping which is shared with other processes (ie. Guests). */
if (key.shared.offset & 1) {
struct lguest_dma_info *i;
+ /* Look through the hash for other Guests. */
list_for_each_entry(i, &dma_hash[hash(&key)], list) {
+ /* Don't send to ourselves. */
if (i->guestid == lg->guestid)
continue;
if (!key_eq(&key, &i->key))
continue;
+ /* If dma_transfer() tells us the destination has no
+ * available buffers, we increment "empty". */
empty += dma_transfer(lg, udma, i);
break;
}
+ /* If the destination is empty, we release our locks and
+ * give the destination Guest a brief chance to restock. */
if (empty == 1) {
/* Give any recipients one chance to restock. */
up_read(¤t->mm->mmap_sem);
mutex_unlock(&lguest_lock);
+ /* Next time, we won't try again. */
empty++;
goto again;
}
} else {
- /* Private mapping: tell our userspace. */
+ /* Private mapping: Guest is sending to its Launcher. We set
+ * the "dma_is_pending" flag so that the main loop will exit
+ * and the Launcher's read() from /dev/lguest will return. */
lg->dma_is_pending = 1;
lg->pending_dma = udma;
lg->pending_key = ukey;
up_read(fshared);
mutex_unlock(&lguest_lock);
}
+/*:*/
void release_all_dma(struct lguest *lg)
{
up_read(&lg->mm->mmap_sem);
}
-/* Userspace wants a dma buffer from this guest. */
+/*M:007 We only return a single DMA buffer to the Launcher, but it would be
+ * more efficient to return a pointer to the entire array of DMA buffers, which
+ * it can cache and choose one whenever it wants.
+ *
+ * Currently the Launcher uses a write to /dev/lguest, and the return value is
+ * the address of the DMA structure with the interrupt number placed in
+ * dma->used_len. If we wanted to return the entire array, we need to return
+ * the address, array size and interrupt number: this seems to require an
+ * ioctl(). :*/
+
+/*L:320 This routine looks for a DMA buffer registered by the Guest on the
+ * given key (using the BIND_DMA hypercall). */
unsigned long get_dma_buffer(struct lguest *lg,
unsigned long ukey, unsigned long *interrupt)
{
struct lguest_dma_info *i;
struct rw_semaphore *fshared = ¤t->mm->mmap_sem;
+ /* Take the Big Lguest Lock to stop other Guests sending this Guest DMA
+ * at the same time. */
mutex_lock(&lguest_lock);
+ /* To match between Guests sharing the same underlying memory we steal
+ * code from the futex infrastructure. This requires that we hold the
+ * "mmap_sem" for our process (the Launcher), and pass it to the futex
+ * code. */
down_read(fshared);
+
+ /* This can fail if it's not a valid address, or if the address is not
+ * divisible by 4 (the futex code needs that, we don't really). */
if (get_futex_key((u32 __user *)ukey, fshared, &key) != 0) {
kill_guest(lg, "bad registered DMA buffer");
goto unlock;
}
+ /* Search the hash table for matching entries (the Launcher can only
+ * send to its own Guest for the moment, so the entry must be for this
+ * Guest) */
list_for_each_entry(i, &dma_hash[hash(&key)], list) {
if (key_eq(&key, &i->key) && i->guestid == lg->guestid) {
unsigned int j;
+ /* Look through the registered DMA array for an
+ * available buffer. */
for (j = 0; j < i->num_dmas; j++) {
struct lguest_dma dma;
if (dma.used_len == 0)
break;
}
+ /* Store the interrupt the Guest wants when the buffer
+ * is used. */
*interrupt = i->interrupt;
break;
}
mutex_unlock(&lguest_lock);
return ret;
}
+/*:*/
+/*L:410 This really has completed the Launcher. Not only have we now finished
+ * the longest chapter in our journey, but this also means we are over halfway
+ * through!
+ *
+ * Enough prevaricating around the bush: it is time for us to dive into the
+ * core of the Host, in "make Host".
+ */
u8 interrupt; /* 0 when not registered */
};
-/* We have separate types for the guest's ptes & pgds and the shadow ptes &
- * pgds. Since this host might use three-level pagetables and the guest and
- * shadow pagetables don't, we can't use the normal pte_t/pgd_t. */
+/*H:310 The page-table code owes a great debt of gratitude to Andi Kleen. He
+ * reviewed the original code which used "u32" for all page table entries, and
+ * insisted that it would be far clearer with explicit typing. I thought it
+ * was overkill, but he was right: it is much clearer than it was before.
+ *
+ * We have separate types for the Guest's ptes & pgds and the shadow ptes &
+ * pgds. There's already a Linux type for these (pte_t and pgd_t) but they
+ * change depending on kernel config options (PAE). */
+
+/* Each entry is identical: lower 12 bits of flags and upper 20 bits for the
+ * "page frame number" (0 == first physical page, etc). They are different
+ * types so the compiler will warn us if we mix them improperly. */
typedef union {
struct { unsigned flags:12, pfn:20; };
struct { unsigned long val; } raw;
struct { unsigned flags:12, pfn:20; };
struct { unsigned long val; } raw;
} gpte_t;
+
+/* We have two convenient macros to convert a "raw" value as handed to us by
+ * the Guest into the correct Guest PGD or PTE type. */
#define mkgpte(_val) ((gpte_t){.raw.val = _val})
#define mkgpgd(_val) ((gpgd_t){.raw.val = _val})
+/*:*/
struct pgdir
{
/* hypercalls.c: */
void do_hypercalls(struct lguest *lg);
+/*L:035
+ * Let's step aside for the moment, to study one important routine that's used
+ * widely in the Host code.
+ *
+ * There are many cases where the Guest does something invalid, like pass crap
+ * to a hypercall. Since only the Guest kernel can make hypercalls, it's quite
+ * acceptable to simply terminate the Guest and give the Launcher a nicely
+ * formatted reason. It's also simpler for the Guest itself, which doesn't
+ * need to check most hypercalls for "success"; if you're still running, it
+ * succeeded.
+ *
+ * Once this is called, the Guest will never run again, so most Host code can
+ * call this then continue as if nothing had happened. This means many
+ * functions don't have to explicitly return an error code, which keeps the
+ * code simple.
+ *
+ * It also means that this can be called more than once: only the first one is
+ * remembered. The only trick is that we still need to kill the Guest even if
+ * we can't allocate memory to store the reason. Linux has a neat way of
+ * packing error codes into invalid pointers, so we use that here.
+ *
+ * Like any macro which uses an "if", it is safely wrapped in a run-once "do {
+ * } while(0)".
+ */
#define kill_guest(lg, fmt...) \
do { \
if (!(lg)->dead) { \
(lg)->dead = ERR_PTR(-ENOMEM); \
} \
} while(0)
+/* (End of aside) :*/
static inline unsigned long guest_pa(struct lguest *lg, unsigned long vaddr)
{
-/*
- * Lguest specific paravirt-ops implementation
+/*P:010
+ * A hypervisor allows multiple Operating Systems to run on a single machine.
+ * To quote David Wheeler: "Any problem in computer science can be solved with
+ * another layer of indirection."
+ *
+ * We keep things simple in two ways. First, we start with a normal Linux
+ * kernel and insert a module (lg.ko) which allows us to run other Linux
+ * kernels the same way we'd run processes. We call the first kernel the Host,
+ * and the others the Guests. The program which sets up and configures Guests
+ * (such as the example in Documentation/lguest/lguest.c) is called the
+ * Launcher.
+ *
+ * Secondly, we only run specially modified Guests, not normal kernels. When
+ * you set CONFIG_LGUEST to 'y' or 'm', this automatically sets
+ * CONFIG_LGUEST_GUEST=y, which compiles this file into the kernel so it knows
+ * how to be a Guest. This means that you can use the same kernel you boot
+ * normally (ie. as a Host) as a Guest.
*
+ * These Guests know that they cannot do privileged operations, such as disable
+ * interrupts, and that they have to ask the Host to do such things explicitly.
+ * This file consists of all the replacements for such low-level native
+ * hardware operations: these special Guest versions call the Host.
+ *
+ * So how does the kernel know it's a Guest? The Guest starts at a special
+ * entry point marked with a magic string, which sets up a few things then
+ * calls here. We replace the native functions in "struct paravirt_ops"
+ * with our Guest versions, then boot like normal. :*/
+
+/*
* Copyright (C) 2006, Rusty Russell <rusty@rustcorp.com.au> IBM Corporation.
*
* This program is free software; you can redistribute it and/or modify
#include <asm/mce.h>
#include <asm/io.h>
+/*G:010 Welcome to the Guest!
+ *
+ * The Guest in our tale is a simple creature: identical to the Host but
+ * behaving in simplified but equivalent ways. In particular, the Guest is the
+ * same kernel as the Host (or at least, built from the same source code). :*/
+
/* Declarations for definitions in lguest_guest.S */
extern char lguest_noirq_start[], lguest_noirq_end[];
extern const char lgstart_cli[], lgend_cli[];
struct lguest_device_desc *lguest_devices;
static cycle_t clock_base;
-static enum paravirt_lazy_mode lazy_mode;
+/*G:035 Notice the lazy_hcall() above, rather than hcall(). This is our first
+ * real optimization trick!
+ *
+ * When lazy_mode is set, it means we're allowed to defer all hypercalls and do
+ * them as a batch when lazy_mode is eventually turned off. Because hypercalls
+ * are reasonably expensive, batching them up makes sense. For example, a
+ * large mmap might update dozens of page table entries: that code calls
+ * lguest_lazy_mode(PARAVIRT_LAZY_MMU), does the dozen updates, then calls
+ * lguest_lazy_mode(PARAVIRT_LAZY_NONE).
+ *
+ * So, when we're in lazy mode, we call async_hypercall() to store the call for
+ * future processing. When lazy mode is turned off we issue a hypercall to
+ * flush the stored calls.
+ *
+ * There's also a hack where "mode" is set to "PARAVIRT_LAZY_FLUSH" which
+ * indicates we're to flush any outstanding calls immediately. This is used
+ * when an interrupt handler does a kmap_atomic(): the page table changes must
+ * happen immediately even if we're in the middle of a batch. Usually we're
+ * not, though, so there's nothing to do. */
+static enum paravirt_lazy_mode lazy_mode; /* Note: not SMP-safe! */
static void lguest_lazy_mode(enum paravirt_lazy_mode mode)
{
if (mode == PARAVIRT_LAZY_FLUSH) {
async_hcall(call, arg1, arg2, arg3);
}
+/* async_hcall() is pretty simple: I'm quite proud of it really. We have a
+ * ring buffer of stored hypercalls which the Host will run though next time we
+ * do a normal hypercall. Each entry in the ring has 4 slots for the hypercall
+ * arguments, and a "hcall_status" word which is 0 if the call is ready to go,
+ * and 255 once the Host has finished with it.
+ *
+ * If we come around to a slot which hasn't been finished, then the table is
+ * full and we just make the hypercall directly. This has the nice side
+ * effect of causing the Host to run all the stored calls in the ring buffer
+ * which empties it for next time! */
void async_hcall(unsigned long call,
unsigned long arg1, unsigned long arg2, unsigned long arg3)
{
static unsigned int next_call;
unsigned long flags;
+ /* Disable interrupts if not already disabled: we don't want an
+ * interrupt handler making a hypercall while we're already doing
+ * one! */
local_irq_save(flags);
if (lguest_data.hcall_status[next_call] != 0xFF) {
/* Table full, so do normal hcall which will flush table. */
lguest_data.hcalls[next_call].edx = arg1;
lguest_data.hcalls[next_call].ebx = arg2;
lguest_data.hcalls[next_call].ecx = arg3;
- /* Make sure host sees arguments before "valid" flag. */
+ /* Arguments must all be written before we mark it to go */
wmb();
lguest_data.hcall_status[next_call] = 0;
if (++next_call == LHCALL_RING_SIZE)
}
local_irq_restore(flags);
}
+/*:*/
+/* Wrappers for the SEND_DMA and BIND_DMA hypercalls. This is mainly because
+ * Jeff Garzik complained that __pa() should never appear in drivers, and this
+ * helps remove most of them. But also, it wraps some ugliness. */
void lguest_send_dma(unsigned long key, struct lguest_dma *dma)
{
+ /* The hcall might not write this if something goes wrong */
dma->used_len = 0;
hcall(LHCALL_SEND_DMA, key, __pa(dma), 0);
}
int lguest_bind_dma(unsigned long key, struct lguest_dma *dmas,
unsigned int num, u8 irq)
{
+ /* This is the only hypercall which actually wants 5 arguments, and we
+ * only support 4. Fortunately the interrupt number is always less
+ * than 256, so we can pack it with the number of dmas in the final
+ * argument. */
if (!hcall(LHCALL_BIND_DMA, key, __pa(dmas), (num << 8) | irq))
return -ENOMEM;
return 0;
}
+/* Unbinding is the same hypercall as binding, but with 0 num & irq. */
void lguest_unbind_dma(unsigned long key, struct lguest_dma *dmas)
{
hcall(LHCALL_BIND_DMA, key, __pa(dmas), 0);
iounmap((__force void __iomem *)addr);
}
+/*G:033
+ * Here are our first native-instruction replacements: four functions for
+ * interrupt control.
+ *
+ * The simplest way of implementing these would be to have "turn interrupts
+ * off" and "turn interrupts on" hypercalls. Unfortunately, this is too slow:
+ * these are by far the most commonly called functions of those we override.
+ *
+ * So instead we keep an "irq_enabled" field inside our "struct lguest_data",
+ * which the Guest can update with a single instruction. The Host knows to
+ * check there when it wants to deliver an interrupt.
+ */
+
+/* save_flags() is expected to return the processor state (ie. "eflags"). The
+ * eflags word contains all kind of stuff, but in practice Linux only cares
+ * about the interrupt flag. Our "save_flags()" just returns that. */
static unsigned long save_fl(void)
{
return lguest_data.irq_enabled;
}
+/* "restore_flags" just sets the flags back to the value given. */
static void restore_fl(unsigned long flags)
{
- /* FIXME: Check if interrupt pending... */
lguest_data.irq_enabled = flags;
}
+/* Interrupts go off... */
static void irq_disable(void)
{
lguest_data.irq_enabled = 0;
}
+/* Interrupts go on... */
static void irq_enable(void)
{
- /* FIXME: Check if interrupt pending... */
lguest_data.irq_enabled = X86_EFLAGS_IF;
}
-
+/*:*/
+/*M:003 Note that we don't check for outstanding interrupts when we re-enable
+ * them (or when we unmask an interrupt). This seems to work for the moment,
+ * since interrupts are rare and we'll just get the interrupt on the next timer
+ * tick, but when we turn on CONFIG_NO_HZ, we should revisit this. One way
+ * would be to put the "irq_enabled" field in a page by itself, and have the
+ * Host write-protect it when an interrupt comes in when irqs are disabled.
+ * There will then be a page fault as soon as interrupts are re-enabled. :*/
+
+/*G:034
+ * The Interrupt Descriptor Table (IDT).
+ *
+ * The IDT tells the processor what to do when an interrupt comes in. Each
+ * entry in the table is a 64-bit descriptor: this holds the privilege level,
+ * address of the handler, and... well, who cares? The Guest just asks the
+ * Host to make the change anyway, because the Host controls the real IDT.
+ */
static void lguest_write_idt_entry(struct desc_struct *dt,
int entrynum, u32 low, u32 high)
{
+ /* Keep the local copy up to date. */
write_dt_entry(dt, entrynum, low, high);
+ /* Tell Host about this new entry. */
hcall(LHCALL_LOAD_IDT_ENTRY, entrynum, low, high);
}
+/* Changing to a different IDT is very rare: we keep the IDT up-to-date every
+ * time it is written, so we can simply loop through all entries and tell the
+ * Host about them. */
static void lguest_load_idt(const struct Xgt_desc_struct *desc)
{
unsigned int i;
hcall(LHCALL_LOAD_IDT_ENTRY, i, idt[i].a, idt[i].b);
}
+/*
+ * The Global Descriptor Table.
+ *
+ * The Intel architecture defines another table, called the Global Descriptor
+ * Table (GDT). You tell the CPU where it is (and its size) using the "lgdt"
+ * instruction, and then several other instructions refer to entries in the
+ * table. There are three entries which the Switcher needs, so the Host simply
+ * controls the entire thing and the Guest asks it to make changes using the
+ * LOAD_GDT hypercall.
+ *
+ * This is the opposite of the IDT code where we have a LOAD_IDT_ENTRY
+ * hypercall and use that repeatedly to load a new IDT. I don't think it
+ * really matters, but wouldn't it be nice if they were the same?
+ */
static void lguest_load_gdt(const struct Xgt_desc_struct *desc)
{
BUG_ON((desc->size+1)/8 != GDT_ENTRIES);
hcall(LHCALL_LOAD_GDT, __pa(desc->address), GDT_ENTRIES, 0);
}
+/* For a single GDT entry which changes, we do the lazy thing: alter our GDT,
+ * then tell the Host to reload the entire thing. This operation is so rare
+ * that this naive implementation is reasonable. */
static void lguest_write_gdt_entry(struct desc_struct *dt,
int entrynum, u32 low, u32 high)
{
hcall(LHCALL_LOAD_GDT, __pa(dt), GDT_ENTRIES, 0);
}
+/* OK, I lied. There are three "thread local storage" GDT entries which change
+ * on every context switch (these three entries are how glibc implements
+ * __thread variables). So we have a hypercall specifically for this case. */
static void lguest_load_tls(struct thread_struct *t, unsigned int cpu)
{
lazy_hcall(LHCALL_LOAD_TLS, __pa(&t->tls_array), cpu, 0);
}
+/*:*/
+/*G:038 That's enough excitement for now, back to ploughing through each of
+ * the paravirt_ops (we're about 1/3 of the way through).
+ *
+ * This is the Local Descriptor Table, another weird Intel thingy. Linux only
+ * uses this for some strange applications like Wine. We don't do anything
+ * here, so they'll get an informative and friendly Segmentation Fault. */
static void lguest_set_ldt(const void *addr, unsigned entries)
{
}
+/* This loads a GDT entry into the "Task Register": that entry points to a
+ * structure called the Task State Segment. Some comments scattered though the
+ * kernel code indicate that this used for task switching in ages past, along
+ * with blood sacrifice and astrology.
+ *
+ * Now there's nothing interesting in here that we don't get told elsewhere.
+ * But the native version uses the "ltr" instruction, which makes the Host
+ * complain to the Guest about a Segmentation Fault and it'll oops. So we
+ * override the native version with a do-nothing version. */
static void lguest_load_tr_desc(void)
{
}
+/* The "cpuid" instruction is a way of querying both the CPU identity
+ * (manufacturer, model, etc) and its features. It was introduced before the
+ * Pentium in 1993 and keeps getting extended by both Intel and AMD. As you
+ * might imagine, after a decade and a half this treatment, it is now a giant
+ * ball of hair. Its entry in the current Intel manual runs to 28 pages.
+ *
+ * This instruction even it has its own Wikipedia entry. The Wikipedia entry
+ * has been translated into 4 languages. I am not making this up!
+ *
+ * We could get funky here and identify ourselves as "GenuineLguest", but
+ * instead we just use the real "cpuid" instruction. Then I pretty much turned
+ * off feature bits until the Guest booted. (Don't say that: you'll damage
+ * lguest sales!) Shut up, inner voice! (Hey, just pointing out that this is
+ * hardly future proof.) Noone's listening! They don't like you anyway,
+ * parenthetic weirdo!
+ *
+ * Replacing the cpuid so we can turn features off is great for the kernel, but
+ * anyone (including userspace) can just use the raw "cpuid" instruction and
+ * the Host won't even notice since it isn't privileged. So we try not to get
+ * too worked up about it. */
static void lguest_cpuid(unsigned int *eax, unsigned int *ebx,
unsigned int *ecx, unsigned int *edx)
{
*ecx &= 0x00002201;
/* SSE, SSE2, FXSR, MMX, CMOV, CMPXCHG8B, FPU. */
*edx &= 0x07808101;
- /* Host wants to know when we flush kernel pages: set PGE. */
+ /* The Host can do a nice optimization if it knows that the
+ * kernel mappings (addresses above 0xC0000000 or whatever
+ * PAGE_OFFSET is set to) haven't changed. But Linux calls
+ * flush_tlb_user() for both user and kernel mappings unless
+ * the Page Global Enable (PGE) feature bit is set. */
*edx |= 0x00002000;
break;
case 0x80000000:
/* Futureproof this a little: if they ask how much extended
- * processor information, limit it to known fields. */
+ * processor information there is, limit it to known fields. */
if (*eax > 0x80000008)
*eax = 0x80000008;
break;
}
}
+/* Intel has four control registers, imaginatively named cr0, cr2, cr3 and cr4.
+ * I assume there's a cr1, but it hasn't bothered us yet, so we'll not bother
+ * it. The Host needs to know when the Guest wants to change them, so we have
+ * a whole series of functions like read_cr0() and write_cr0().
+ *
+ * We start with CR0. CR0 allows you to turn on and off all kinds of basic
+ * features, but Linux only really cares about one: the horrifically-named Task
+ * Switched (TS) bit at bit 3 (ie. 8)
+ *
+ * What does the TS bit do? Well, it causes the CPU to trap (interrupt 7) if
+ * the floating point unit is used. Which allows us to restore FPU state
+ * lazily after a task switch, and Linux uses that gratefully, but wouldn't a
+ * name like "FPUTRAP bit" be a little less cryptic?
+ *
+ * We store cr0 (and cr3) locally, because the Host never changes it. The
+ * Guest sometimes wants to read it and we'd prefer not to bother the Host
+ * unnecessarily. */
static unsigned long current_cr0, current_cr3;
static void lguest_write_cr0(unsigned long val)
{
+ /* 8 == TS bit. */
lazy_hcall(LHCALL_TS, val & 8, 0, 0);
current_cr0 = val;
}
return current_cr0;
}
+/* Intel provided a special instruction to clear the TS bit for people too cool
+ * to use write_cr0() to do it. This "clts" instruction is faster, because all
+ * the vowels have been optimized out. */
static void lguest_clts(void)
{
lazy_hcall(LHCALL_TS, 0, 0, 0);
current_cr0 &= ~8U;
}
+/* CR2 is the virtual address of the last page fault, which the Guest only ever
+ * reads. The Host kindly writes this into our "struct lguest_data", so we
+ * just read it out of there. */
static unsigned long lguest_read_cr2(void)
{
return lguest_data.cr2;
}
+/* CR3 is the current toplevel pagetable page: the principle is the same as
+ * cr0. Keep a local copy, and tell the Host when it changes. */
static void lguest_write_cr3(unsigned long cr3)
{
lazy_hcall(LHCALL_NEW_PGTABLE, cr3, 0, 0);
return current_cr3;
}
-/* Used to enable/disable PGE, but we don't care. */
+/* CR4 is used to enable and disable PGE, but we don't care. */
static unsigned long lguest_read_cr4(void)
{
return 0;
{
}
+/*
+ * Page Table Handling.
+ *
+ * Now would be a good time to take a rest and grab a coffee or similarly
+ * relaxing stimulant. The easy parts are behind us, and the trek gradually
+ * winds uphill from here.
+ *
+ * Quick refresher: memory is divided into "pages" of 4096 bytes each. The CPU
+ * maps virtual addresses to physical addresses using "page tables". We could
+ * use one huge index of 1 million entries: each address is 4 bytes, so that's
+ * 1024 pages just to hold the page tables. But since most virtual addresses
+ * are unused, we use a two level index which saves space. The CR3 register
+ * contains the physical address of the top level "page directory" page, which
+ * contains physical addresses of up to 1024 second-level pages. Each of these
+ * second level pages contains up to 1024 physical addresses of actual pages,
+ * or Page Table Entries (PTEs).
+ *
+ * Here's a diagram, where arrows indicate physical addresses:
+ *
+ * CR3 ---> +---------+
+ * | --------->+---------+
+ * | | | PADDR1 |
+ * Top-level | | PADDR2 |
+ * (PMD) page | | |
+ * | | Lower-level |
+ * | | (PTE) page |
+ * | | | |
+ * .... ....
+ *
+ * So to convert a virtual address to a physical address, we look up the top
+ * level, which points us to the second level, which gives us the physical
+ * address of that page. If the top level entry was not present, or the second
+ * level entry was not present, then the virtual address is invalid (we
+ * say "the page was not mapped").
+ *
+ * Put another way, a 32-bit virtual address is divided up like so:
+ *
+ * 1 1 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
+ * |<---- 10 bits ---->|<---- 10 bits ---->|<------ 12 bits ------>|
+ * Index into top Index into second Offset within page
+ * page directory page pagetable page
+ *
+ * The kernel spends a lot of time changing both the top-level page directory
+ * and lower-level pagetable pages. The Guest doesn't know physical addresses,
+ * so while it maintains these page tables exactly like normal, it also needs
+ * to keep the Host informed whenever it makes a change: the Host will create
+ * the real page tables based on the Guests'.
+ */
+
+/* The Guest calls this to set a second-level entry (pte), ie. to map a page
+ * into a process' address space. We set the entry then tell the Host the
+ * toplevel and address this corresponds to. The Guest uses one pagetable per
+ * process, so we need to tell the Host which one we're changing (mm->pgd). */
static void lguest_set_pte_at(struct mm_struct *mm, unsigned long addr,
pte_t *ptep, pte_t pteval)
{
lazy_hcall(LHCALL_SET_PTE, __pa(mm->pgd), addr, pteval.pte_low);
}
-/* We only support two-level pagetables at the moment. */
+/* The Guest calls this to set a top-level entry. Again, we set the entry then
+ * tell the Host which top-level page we changed, and the index of the entry we
+ * changed. */
static void lguest_set_pmd(pmd_t *pmdp, pmd_t pmdval)
{
*pmdp = pmdval;
(__pa(pmdp)&(PAGE_SIZE-1))/4, 0);
}
-/* FIXME: Eliminate all callers of this. */
+/* There are a couple of legacy places where the kernel sets a PTE, but we
+ * don't know the top level any more. This is useless for us, since we don't
+ * know which pagetable is changing or what address, so we just tell the Host
+ * to forget all of them. Fortunately, this is very rare.
+ *
+ * ... except in early boot when the kernel sets up the initial pagetables,
+ * which makes booting astonishingly slow. So we don't even tell the Host
+ * anything changed until we've done the first page table switch.
+ */
static void lguest_set_pte(pte_t *ptep, pte_t pteval)
{
*ptep = pteval;
lazy_hcall(LHCALL_FLUSH_TLB, 1, 0, 0);
}
+/* Unfortunately for Lguest, the paravirt_ops for page tables were based on
+ * native page table operations. On native hardware you can set a new page
+ * table entry whenever you want, but if you want to remove one you have to do
+ * a TLB flush (a TLB is a little cache of page table entries kept by the CPU).
+ *
+ * So the lguest_set_pte_at() and lguest_set_pmd() functions above are only
+ * called when a valid entry is written, not when it's removed (ie. marked not
+ * present). Instead, this is where we come when the Guest wants to remove a
+ * page table entry: we tell the Host to set that entry to 0 (ie. the present
+ * bit is zero). */
static void lguest_flush_tlb_single(unsigned long addr)
{
- /* Simply set it to zero, and it will fault back in. */
+ /* Simply set it to zero: if it was not, it will fault back in. */
lazy_hcall(LHCALL_SET_PTE, current_cr3, addr, 0);
}
+/* This is what happens after the Guest has removed a large number of entries.
+ * This tells the Host that any of the page table entries for userspace might
+ * have changed, ie. virtual addresses below PAGE_OFFSET. */
static void lguest_flush_tlb_user(void)
{
lazy_hcall(LHCALL_FLUSH_TLB, 0, 0, 0);
}
+/* This is called when the kernel page tables have changed. That's not very
+ * common (unless the Guest is using highmem, which makes the Guest extremely
+ * slow), so it's worth separating this from the user flushing above. */
static void lguest_flush_tlb_kernel(void)
{
lazy_hcall(LHCALL_FLUSH_TLB, 1, 0, 0);
}
+/*
+ * The Unadvanced Programmable Interrupt Controller.
+ *
+ * This is an attempt to implement the simplest possible interrupt controller.
+ * I spent some time looking though routines like set_irq_chip_and_handler,
+ * set_irq_chip_and_handler_name, set_irq_chip_data and set_phasers_to_stun and
+ * I *think* this is as simple as it gets.
+ *
+ * We can tell the Host what interrupts we want blocked ready for using the
+ * lguest_data.interrupts bitmap, so disabling (aka "masking") them is as
+ * simple as setting a bit. We don't actually "ack" interrupts as such, we
+ * just mask and unmask them. I wonder if we should be cleverer?
+ */
static void disable_lguest_irq(unsigned int irq)
{
set_bit(irq, lguest_data.blocked_interrupts);
static void enable_lguest_irq(unsigned int irq)
{
clear_bit(irq, lguest_data.blocked_interrupts);
- /* FIXME: If it's pending? */
}
+/* This structure describes the lguest IRQ controller. */
static struct irq_chip lguest_irq_controller = {
.name = "lguest",
.mask = disable_lguest_irq,
.unmask = enable_lguest_irq,
};
+/* This sets up the Interrupt Descriptor Table (IDT) entry for each hardware
+ * interrupt (except 128, which is used for system calls), and then tells the
+ * Linux infrastructure that each interrupt is controlled by our level-based
+ * lguest interrupt controller. */
static void __init lguest_init_IRQ(void)
{
unsigned int i;
handle_level_irq);
}
}
+ /* This call is required to set up for 4k stacks, where we have
+ * separate stacks for hard and soft interrupts. */
irq_ctx_init(smp_processor_id());
}
+/*
+ * Time.
+ *
+ * It would be far better for everyone if the Guest had its own clock, but
+ * until then it must ask the Host for the time.
+ */
static unsigned long lguest_get_wallclock(void)
{
return hcall(LHCALL_GET_WALLCLOCK, 0, 0, 0);
}
+/* If the Host tells us we can trust the TSC, we use that, otherwise we simply
+ * use the imprecise but reliable "jiffies" counter. */
static cycle_t lguest_clock_read(void)
{
if (lguest_data.tsc_khz)
local_irq_restore(flags);
}
+/* At some point in the boot process, we get asked to set up our timing
+ * infrastructure. The kernel doesn't expect timer interrupts before this, but
+ * we cleverly initialized the "blocked_interrupts" field of "struct
+ * lguest_data" so that timer interrupts were blocked until now. */
static void lguest_time_init(void)
{
+ /* Set up the timer interrupt (0) to go to our simple timer routine */
set_irq_handler(0, lguest_time_irq);
- /* We use the TSC if the Host tells us we can, otherwise a dumb
- * jiffies-based clock. */
+ /* Our clock structure look like arch/i386/kernel/tsc.c if we can use
+ * the TSC, otherwise it looks like kernel/time/jiffies.c. Either way,
+ * the "rating" is initialized so high that it's always chosen over any
+ * other clocksource. */
if (lguest_data.tsc_khz) {
lguest_clock.shift = 22;
lguest_clock.mult = clocksource_khz2mult(lguest_data.tsc_khz,
clock_base = lguest_clock_read();
clocksource_register(&lguest_clock);
- /* We can't set cpumask in the initializer: damn C limitations! */
+ /* We can't set cpumask in the initializer: damn C limitations! Set it
+ * here and register our timer device. */
lguest_clockevent.cpumask = cpumask_of_cpu(0);
clockevents_register_device(&lguest_clockevent);
+ /* Finally, we unblock the timer interrupt. */
enable_lguest_irq(0);
}
+/*
+ * Miscellaneous bits and pieces.
+ *
+ * Here is an oddball collection of functions which the Guest needs for things
+ * to work. They're pretty simple.
+ */
+
+/* The Guest needs to tell the host what stack it expects traps to use. For
+ * native hardware, this is part of the Task State Segment mentioned above in
+ * lguest_load_tr_desc(), but to help hypervisors there's this special call.
+ *
+ * We tell the Host the segment we want to use (__KERNEL_DS is the kernel data
+ * segment), the privilege level (we're privilege level 1, the Host is 0 and
+ * will not tolerate us trying to use that), the stack pointer, and the number
+ * of pages in the stack. */
static void lguest_load_esp0(struct tss_struct *tss,
struct thread_struct *thread)
{
THREAD_SIZE/PAGE_SIZE);
}
+/* Let's just say, I wouldn't do debugging under a Guest. */
static void lguest_set_debugreg(int regno, unsigned long value)
{
/* FIXME: Implement */
}
+/* There are times when the kernel wants to make sure that no memory writes are
+ * caught in the cache (that they've all reached real hardware devices). This
+ * doesn't matter for the Guest which has virtual hardware.
+ *
+ * On the Pentium 4 and above, cpuid() indicates that the Cache Line Flush
+ * (clflush) instruction is available and the kernel uses that. Otherwise, it
+ * uses the older "Write Back and Invalidate Cache" (wbinvd) instruction.
+ * Unlike clflush, wbinvd can only be run at privilege level 0. So we can
+ * ignore clflush, but replace wbinvd.
+ */
static void lguest_wbinvd(void)
{
}
+/* If the Guest expects to have an Advanced Programmable Interrupt Controller,
+ * we play dumb by ignoring writes and returning 0 for reads. So it's no
+ * longer Programmable nor Controlling anything, and I don't think 8 lines of
+ * code qualifies for Advanced. It will also never interrupt anything. It
+ * does, however, allow us to get through the Linux boot code. */
#ifdef CONFIG_X86_LOCAL_APIC
static void lguest_apic_write(unsigned long reg, unsigned long v)
{
}
#endif
+/* STOP! Until an interrupt comes in. */
static void lguest_safe_halt(void)
{
hcall(LHCALL_HALT, 0, 0, 0);
}
+/* Perhaps CRASH isn't the best name for this hypercall, but we use it to get a
+ * message out when we're crashing as well as elegant termination like powering
+ * off.
+ *
+ * Note that the Host always prefers that the Guest speak in physical addresses
+ * rather than virtual addresses, so we use __pa() here. */
static void lguest_power_off(void)
{
hcall(LHCALL_CRASH, __pa("Power down"), 0, 0);
}
+/*
+ * Panicing.
+ *
+ * Don't. But if you did, this is what happens.
+ */
static int lguest_panic(struct notifier_block *nb, unsigned long l, void *p)
{
hcall(LHCALL_CRASH, __pa(p), 0, 0);
+ /* The hcall won't return, but to keep gcc happy, we're "done". */
return NOTIFY_DONE;
}
.notifier_call = lguest_panic
};
+/* Setting up memory is fairly easy. */
static __init char *lguest_memory_setup(void)
{
- /* We do this here because lockcheck barfs if before start_kernel */
+ /* We do this here and not earlier because lockcheck barfs if we do it
+ * before start_kernel() */
atomic_notifier_chain_register(&panic_notifier_list, &paniced);
+ /* The Linux bootloader header contains an "e820" memory map: the
+ * Launcher populated the first entry with our memory limit. */
add_memory_region(E820_MAP->addr, E820_MAP->size, E820_MAP->type);
+
+ /* This string is for the boot messages. */
return "LGUEST";
}
+/*G:050
+ * Patching (Powerfully Placating Performance Pedants)
+ *
+ * We have already seen that "struct paravirt_ops" lets us replace simple
+ * native instructions with calls to the appropriate back end all throughout
+ * the kernel. This allows the same kernel to run as a Guest and as a native
+ * kernel, but it's slow because of all the indirect branches.
+ *
+ * Remember that David Wheeler quote about "Any problem in computer science can
+ * be solved with another layer of indirection"? The rest of that quote is
+ * "... But that usually will create another problem." This is the first of
+ * those problems.
+ *
+ * Our current solution is to allow the paravirt back end to optionally patch
+ * over the indirect calls to replace them with something more efficient. We
+ * patch the four most commonly called functions: disable interrupts, enable
+ * interrupts, restore interrupts and save interrupts. We usually have 10
+ * bytes to patch into: the Guest versions of these operations are small enough
+ * that we can fit comfortably.
+ *
+ * First we need assembly templates of each of the patchable Guest operations,
+ * and these are in lguest_asm.S. */
+
+/*G:060 We construct a table from the assembler templates: */
static const struct lguest_insns
{
const char *start, *end;
[PARAVIRT_PATCH(restore_fl)] = { lgstart_popf, lgend_popf },
[PARAVIRT_PATCH(save_fl)] = { lgstart_pushf, lgend_pushf },
};
+
+/* Now our patch routine is fairly simple (based on the native one in
+ * paravirt.c). If we have a replacement, we copy it in and return how much of
+ * the available space we used. */
static unsigned lguest_patch(u8 type, u16 clobber, void *insns, unsigned len)
{
unsigned int insn_len;
- /* Don't touch it if we don't have a replacement */
+ /* Don't do anything special if we don't have a replacement */
if (type >= ARRAY_SIZE(lguest_insns) || !lguest_insns[type].start)
return paravirt_patch_default(type, clobber, insns, len);
insn_len = lguest_insns[type].end - lguest_insns[type].start;
- /* Similarly if we can't fit replacement. */
+ /* Similarly if we can't fit replacement (shouldn't happen, but let's
+ * be thorough). */
if (len < insn_len)
return paravirt_patch_default(type, clobber, insns, len);
+ /* Copy in our instructions. */
memcpy(insns, lguest_insns[type].start, insn_len);
return insn_len;
}
+/*G:030 Once we get to lguest_init(), we know we're a Guest. The paravirt_ops
+ * structure in the kernel provides a single point for (almost) every routine
+ * we have to override to avoid privileged instructions. */
__init void lguest_init(void *boot)
{
- /* Copy boot parameters first. */
+ /* Copy boot parameters first: the Launcher put the physical location
+ * in %esi, and head.S converted that to a virtual address and handed
+ * it to us. */
memcpy(&boot_params, boot, PARAM_SIZE);
+ /* The boot parameters also tell us where the command-line is: save
+ * that, too. */
memcpy(boot_command_line, __va(boot_params.hdr.cmd_line_ptr),
COMMAND_LINE_SIZE);
+ /* We're under lguest, paravirt is enabled, and we're running at
+ * privilege level 1, not 0 as normal. */
paravirt_ops.name = "lguest";
paravirt_ops.paravirt_enabled = 1;
paravirt_ops.kernel_rpl = 1;
+ /* We set up all the lguest overrides for sensitive operations. These
+ * are detailed with the operations themselves. */
paravirt_ops.save_fl = save_fl;
paravirt_ops.restore_fl = restore_fl;
paravirt_ops.irq_disable = irq_disable;
paravirt_ops.set_lazy_mode = lguest_lazy_mode;
paravirt_ops.wbinvd = lguest_wbinvd;
paravirt_ops.sched_clock = lguest_sched_clock;
-
+ /* Now is a good time to look at the implementations of these functions
+ * before returning to the rest of lguest_init(). */
+
+ /*G:070 Now we've seen all the paravirt_ops, we return to
+ * lguest_init() where the rest of the fairly chaotic boot setup
+ * occurs.
+ *
+ * The Host expects our first hypercall to tell it where our "struct
+ * lguest_data" is, so we do that first. */
hcall(LHCALL_LGUEST_INIT, __pa(&lguest_data), 0, 0);
- /* We use top of mem for initial pagetables. */
+ /* The native boot code sets up initial page tables immediately after
+ * the kernel itself, and sets init_pg_tables_end so they're not
+ * clobbered. The Launcher places our initial pagetables somewhere at
+ * the top of our physical memory, so we don't need extra space: set
+ * init_pg_tables_end to the end of the kernel. */
init_pg_tables_end = __pa(pg0);
+ /* Load the %fs segment register (the per-cpu segment register) with
+ * the normal data segment to get through booting. */
asm volatile ("mov %0, %%fs" : : "r" (__KERNEL_DS) : "memory");
+ /* The Host uses the top of the Guest's virtual address space for the
+ * Host<->Guest Switcher, and it tells us how much it needs in
+ * lguest_data.reserve_mem, set up on the LGUEST_INIT hypercall. */
reserve_top_address(lguest_data.reserve_mem);
+ /* If we don't initialize the lock dependency checker now, it crashes
+ * paravirt_disable_iospace. */
lockdep_init();
+ /* The IDE code spends about 3 seconds probing for disks: if we reserve
+ * all the I/O ports up front it can't get them and so doesn't probe.
+ * Other device drivers are similar (but less severe). This cuts the
+ * kernel boot time on my machine from 4.1 seconds to 0.45 seconds. */
paravirt_disable_iospace();
+ /* This is messy CPU setup stuff which the native boot code does before
+ * start_kernel, so we have to do, too: */
cpu_detect(&new_cpu_data);
/* head.S usually sets up the first capability word, so do it here. */
new_cpu_data.x86_capability[0] = cpuid_edx(1);
#ifdef CONFIG_X86_MCE
mce_disabled = 1;
#endif
-
#ifdef CONFIG_ACPI
acpi_disabled = 1;
acpi_ht = 0;
#endif
+ /* We set the perferred console to "hvc". This is the "hypervisor
+ * virtual console" driver written by the PowerPC people, which we also
+ * adapted for lguest's use. */
add_preferred_console("hvc", 0, NULL);
+ /* Last of all, we set the power management poweroff hook to point to
+ * the Guest routine to power off. */
pm_power_off = lguest_power_off;
+
+ /* Now we're set up, call start_kernel() in init/main.c and we proceed
+ * to boot as normal. It never returns. */
start_kernel();
}
+/*
+ * This marks the end of stage II of our journey, The Guest.
+ *
+ * It is now time for us to explore the nooks and crannies of the three Guest
+ * devices and complete our understanding of the Guest in "make Drivers".
+ */
#include <asm/thread_info.h>
#include <asm/processor-flags.h>
-/*
- * This is where we begin: we have a magic signature which the launcher looks
- * for. The plan is that the Linux boot protocol will be extended with a
+/*G:020 This is where we begin: we have a magic signature which the launcher
+ * looks for. The plan is that the Linux boot protocol will be extended with a
* "platform type" field which will guide us here from the normal entry point,
- * but for the moment this suffices. We pass the virtual address of the boot
- * info to lguest_init().
+ * but for the moment this suffices. The normal boot code uses %esi for the
+ * boot header, so we do too. We convert it to a virtual address by adding
+ * PAGE_OFFSET, and hand it to lguest_init() as its argument (ie. %eax).
*
- * We put it in .init.text will be discarded after boot.
- */
+ * The .section line puts this code in .init.text so it will be discarded after
+ * boot. */
.section .init.text, "ax", @progbits
.ascii "GenuineLguest"
/* Set up initial stack. */
addl $__PAGE_OFFSET, %eax
jmp lguest_init
-/* The templates for inline patching. */
+/*G:055 We create a macro which puts the assembler code between lgstart_ and
+ * lgend_ markers. These templates end up in the .init.text section, so they
+ * are discarded after boot. */
#define LGUEST_PATCH(name, insns...) \
lgstart_##name: insns; lgend_##name:; \
.globl lgstart_##name; .globl lgend_##name
LGUEST_PATCH(sti, movl $X86_EFLAGS_IF, lguest_data+LGUEST_DATA_irq_enabled)
LGUEST_PATCH(popf, movl %eax, lguest_data+LGUEST_DATA_irq_enabled)
LGUEST_PATCH(pushf, movl lguest_data+LGUEST_DATA_irq_enabled, %eax)
+/*:*/
.text
/* These demark the EIP range where host should never deliver interrupts. */
.global lguest_noirq_start
.global lguest_noirq_end
-/*
- * We move eflags word to lguest_data.irq_enabled to restore interrupt state.
- * For page faults, gpfs and virtual interrupts, the hypervisor has saved
- * eflags manually, otherwise it was delivered directly and so eflags reflects
- * the real machine IF state, ie. interrupts on. Since the kernel always dies
- * if it takes such a trap with interrupts disabled anyway, turning interrupts
- * back on unconditionally here is OK.
- */
+/*M:004 When the Host reflects a trap or injects an interrupt into the Guest,
+ * it sets the eflags interrupt bit on the stack based on
+ * lguest_data.irq_enabled, so the Guest iret logic does the right thing when
+ * restoring it. However, when the Host sets the Guest up for direct traps,
+ * such as system calls, the processor is the one to push eflags onto the
+ * stack, and the interrupt bit will be 1 (in reality, interrupts are always
+ * enabled in the Guest).
+ *
+ * This turns out to be harmless: the only trap which should happen under Linux
+ * with interrupts disabled is Page Fault (due to our lazy mapping of vmalloc
+ * regions), which has to be reflected through the Host anyway. If another
+ * trap *does* go off when interrupts are disabled, the Guest will panic, and
+ * we'll never get to this iret! :*/
+
+/*G:045 There is one final paravirt_op that the Guest implements, and glancing
+ * at it you can see why I left it to last. It's *cool*! It's in *assembler*!
+ *
+ * The "iret" instruction is used to return from an interrupt or trap. The
+ * stack looks like this:
+ * old address
+ * old code segment & privilege level
+ * old processor flags ("eflags")
+ *
+ * The "iret" instruction pops those values off the stack and restores them all
+ * at once. The only problem is that eflags includes the Interrupt Flag which
+ * the Guest can't change: the CPU will simply ignore it when we do an "iret".
+ * So we have to copy eflags from the stack to lguest_data.irq_enabled before
+ * we do the "iret".
+ *
+ * There are two problems with this: firstly, we need to use a register to do
+ * the copy and secondly, the whole thing needs to be atomic. The first
+ * problem is easy to solve: push %eax on the stack so we can use it, and then
+ * restore it at the end just before the real "iret".
+ *
+ * The second is harder: copying eflags to lguest_data.irq_enabled will turn
+ * interrupts on before we're finished, so we could be interrupted before we
+ * return to userspace or wherever. Our solution to this is to surround the
+ * code with lguest_noirq_start: and lguest_noirq_end: labels. We tell the
+ * Host that it is *never* to interrupt us there, even if interrupts seem to be
+ * enabled. */
ENTRY(lguest_iret)
pushl %eax
movl 12(%esp), %eax
lguest_noirq_start:
+ /* Note the %ss: segment prefix here. Normal data accesses use the
+ * "ds" segment, but that will have already been restored for whatever
+ * we're returning to (such as userspace): we can't trust it. The %ss:
+ * prefix makes sure we use the stack segment, which is still valid. */
movl %eax,%ss:lguest_data+LGUEST_DATA_irq_enabled
popl %eax
iret
+/*P:050 Lguest guests use a very simple bus for devices. It's a simple array
+ * of device descriptors contained just above the top of normal memory. The
+ * lguest bus is 80% tedious boilerplate code. :*/
#include <linux/init.h>
#include <linux/bootmem.h>
#include <linux/lguest_bus.h>
__ATTR_NULL
};
+/*D:130 The generic bus infrastructure requires a function which says whether a
+ * device matches a driver. For us, it is simple: "struct lguest_driver"
+ * contains a "device_type" field which indicates what type of device it can
+ * handle, so we just cast the args and compare: */
static int lguest_dev_match(struct device *_dev, struct device_driver *_drv)
{
struct lguest_device *dev = container_of(_dev,struct lguest_device,dev);
return (drv->device_type == lguest_devices[dev->index].type);
}
+/*:*/
struct lguest_bus {
struct bus_type bus;
}
};
+/*D:140 This is the callback which occurs once the bus infrastructure matches
+ * up a device and driver, ie. in response to add_lguest_device() calling
+ * device_register(), or register_lguest_driver() calling driver_register().
+ *
+ * At the moment it's always the latter: the devices are added first, since
+ * scan_devices() is called from a "core_initcall", and the drivers themselves
+ * called later as a normal "initcall". But it would work the other way too.
+ *
+ * So now we have the happy couple, we add the status bit to indicate that we
+ * found a driver. If the driver truly loves the device, it will return
+ * happiness from its probe function (ok, perhaps this wasn't my greatest
+ * analogy), and we set the final "driver ok" bit so the Host sees it's all
+ * green. */
static int lguest_dev_probe(struct device *_dev)
{
int ret;
- struct lguest_device *dev = container_of(_dev,struct lguest_device,dev);
- struct lguest_driver *drv = container_of(dev->dev.driver,
+ struct lguest_device*dev = container_of(_dev,struct lguest_device,dev);
+ struct lguest_driver*drv = container_of(dev->dev.driver,
struct lguest_driver, drv);
lguest_devices[dev->index].status |= LGUEST_DEVICE_S_DRIVER;
return ret;
}
+/* The last part of the bus infrastructure is the function lguest drivers use
+ * to register themselves. Firstly, we do nothing if there's no lguest bus
+ * (ie. this is not a Guest), otherwise we fill in the embedded generic "struct
+ * driver" fields and call the generic driver_register(). */
int register_lguest_driver(struct lguest_driver *drv)
{
if (!lguest_devices)
return driver_register(&drv->drv);
}
+
+/* At the moment we build all the drivers into the kernel because they're so
+ * simple: 8144 bytes for all three of them as I type this. And as the console
+ * really needs to be built in, it's actually only 3527 bytes for the network
+ * and block drivers.
+ *
+ * If they get complex it will make sense for them to be modularized, so we
+ * need to explicitly export the symbol.
+ *
+ * I don't think non-GPL modules make sense, so it's a GPL-only export.
+ */
EXPORT_SYMBOL_GPL(register_lguest_driver);
+/*D:120 This is the core of the lguest bus: actually adding a new device.
+ * It's a separate function because it's neater that way, and because an
+ * earlier version of the code supported hotplug and unplug. They were removed
+ * early on because they were never used.
+ *
+ * As Andrew Tridgell says, "Untested code is buggy code".
+ *
+ * It's worth reading this carefully: we start with an index into the array of
+ * "struct lguest_device_desc"s indicating the device which is new: */
static void add_lguest_device(unsigned int index)
{
struct lguest_device *new;
+ /* Each "struct lguest_device_desc" has a "status" field, which the
+ * Guest updates as the device is probed. In the worst case, the Host
+ * can look at these bits to tell what part of device setup failed,
+ * even if the console isn't available. */
lguest_devices[index].status |= LGUEST_DEVICE_S_ACKNOWLEDGE;
new = kmalloc(sizeof(struct lguest_device), GFP_KERNEL);
if (!new) {
return;
}
+ /* The "struct lguest_device" setup is pretty straight-forward example
+ * code. */
new->index = index;
new->private = NULL;
memset(&new->dev, 0, sizeof(new->dev));
new->dev.parent = &lguest_bus.dev;
new->dev.bus = &lguest_bus.bus;
sprintf(new->dev.bus_id, "%u", index);
+
+ /* device_register() causes the bus infrastructure to look for a
+ * matching driver. */
if (device_register(&new->dev) != 0) {
printk(KERN_EMERG "Cannot register lguest device %u\n", index);
lguest_devices[index].status |= LGUEST_DEVICE_S_FAILED;
}
}
+/*D:110 scan_devices() simply iterates through the device array. The type 0
+ * is reserved to mean "no device", and anything else means we have found a
+ * device: add it. */
static void scan_devices(void)
{
unsigned int i;
add_lguest_device(i);
}
+/*D:100 Fairly early in boot, lguest_bus_init() is called to set up the lguest
+ * bus. We check that we are a Guest by checking paravirt_ops.name: there are
+ * other ways of checking, but this seems most obvious to me.
+ *
+ * So we can access the array of "struct lguest_device_desc"s easily, we map
+ * that memory and store the pointer in the global "lguest_devices". Then we
+ * register the bus with the core. Doing two registrations seems clunky to me,
+ * but it seems to be the correct sysfs incantation.
+ *
+ * Finally we call scan_devices() which adds all the devices found in the
+ * "struct lguest_device_desc" array. */
static int __init lguest_bus_init(void)
{
if (strcmp(paravirt_ops.name, "lguest") != 0)
return 0;
- /* Devices are in page above top of "normal" mem. */
+ /* Devices are in a single page above top of "normal" mem */
lguest_devices = lguest_map(max_pfn<<PAGE_SHIFT, 1);
if (bus_register(&lguest_bus.bus) != 0
scan_devices();
return 0;
}
+/* Do this after core stuff, before devices. */
postcore_initcall(lguest_bus_init);
-/* Userspace control of the guest, via /dev/lguest. */
+/*P:200 This contains all the /dev/lguest code, whereby the userspace launcher
+ * controls and communicates with the Guest. For example, the first write will
+ * tell us the memory size, pagetable, entry point and kernel address offset.
+ * A read will run the Guest until a signal is pending (-EINTR), or the Guest
+ * does a DMA out to the Launcher. Writes are also used to get a DMA buffer
+ * registered by the Guest and to send the Guest an interrupt. :*/
#include <linux/uaccess.h>
#include <linux/miscdevice.h>
#include <linux/fs.h>
#include "lg.h"
+/*L:030 setup_regs() doesn't really belong in this file, but it gives us an
+ * early glimpse deeper into the Host so it's worth having here.
+ *
+ * Most of the Guest's registers are left alone: we used get_zeroed_page() to
+ * allocate the structure, so they will be 0. */
static void setup_regs(struct lguest_regs *regs, unsigned long start)
{
- /* Write out stack in format lguest expects, so we can switch to it. */
+ /* There are four "segment" registers which the Guest needs to boot:
+ * The "code segment" register (cs) refers to the kernel code segment
+ * __KERNEL_CS, and the "data", "extra" and "stack" segment registers
+ * refer to the kernel data segment __KERNEL_DS.
+ *
+ * The privilege level is packed into the lower bits. The Guest runs
+ * at privilege level 1 (GUEST_PL).*/
regs->ds = regs->es = regs->ss = __KERNEL_DS|GUEST_PL;
regs->cs = __KERNEL_CS|GUEST_PL;
- regs->eflags = 0x202; /* Interrupts enabled. */
+
+ /* The "eflags" register contains miscellaneous flags. Bit 1 (0x002)
+ * is supposed to always be "1". Bit 9 (0x200) controls whether
+ * interrupts are enabled. We always leave interrupts enabled while
+ * running the Guest. */
+ regs->eflags = 0x202;
+
+ /* The "Extended Instruction Pointer" register says where the Guest is
+ * running. */
regs->eip = start;
- /* esi points to our boot information (physical address 0) */
+
+ /* %esi points to our boot information, at physical address 0, so don't
+ * touch it. */
}
-/* + addr */
+/*L:310 To send DMA into the Guest, the Launcher needs to be able to ask for a
+ * DMA buffer. This is done by writing LHREQ_GETDMA and the key to
+ * /dev/lguest. */
static long user_get_dma(struct lguest *lg, const u32 __user *input)
{
unsigned long key, udma, irq;
+ /* Fetch the key they wrote to us. */
if (get_user(key, input) != 0)
return -EFAULT;
+ /* Look for a free Guest DMA buffer bound to that key. */
udma = get_dma_buffer(lg, key, &irq);
if (!udma)
return -ENOENT;
- /* We put irq number in udma->used_len. */
+ /* We need to tell the Launcher what interrupt the Guest expects after
+ * the buffer is filled. We stash it in udma->used_len. */
lgwrite_u32(lg, udma + offsetof(struct lguest_dma, used_len), irq);
+
+ /* The (guest-physical) address of the DMA buffer is returned from
+ * the write(). */
return udma;
}
-/* To force the Guest to stop running and return to the Launcher, the
+/*L:315 To force the Guest to stop running and return to the Launcher, the
* Waker sets writes LHREQ_BREAK and the value "1" to /dev/lguest. The
* Launcher then writes LHREQ_BREAK and "0" to release the Waker. */
static int break_guest_out(struct lguest *lg, const u32 __user *input)
}
}
-/* + irq */
+/*L:050 Sending an interrupt is done by writing LHREQ_IRQ and an interrupt
+ * number to /dev/lguest. */
static int user_send_irq(struct lguest *lg, const u32 __user *input)
{
u32 irq;
return -EFAULT;
if (irq >= LGUEST_IRQS)
return -EINVAL;
+ /* Next time the Guest runs, the core code will see if it can deliver
+ * this interrupt. */
set_bit(irq, lg->irqs_pending);
return 0;
}
+/*L:040 Once our Guest is initialized, the Launcher makes it run by reading
+ * from /dev/lguest. */
static ssize_t read(struct file *file, char __user *user, size_t size,loff_t*o)
{
struct lguest *lg = file->private_data;
+ /* You must write LHREQ_INITIALIZE first! */
if (!lg)
return -EINVAL;
if (current != lg->tsk)
return -EPERM;
+ /* If the guest is already dead, we indicate why */
if (lg->dead) {
size_t len;
+ /* lg->dead either contains an error code, or a string. */
if (IS_ERR(lg->dead))
return PTR_ERR(lg->dead);
+ /* We can only return as much as the buffer they read with. */
len = min(size, strlen(lg->dead)+1);
if (copy_to_user(user, lg->dead, len) != 0)
return -EFAULT;
return len;
}
+ /* If we returned from read() last time because the Guest sent DMA,
+ * clear the flag. */
if (lg->dma_is_pending)
lg->dma_is_pending = 0;
+ /* Run the Guest until something interesting happens. */
return run_guest(lg, (unsigned long __user *)user);
}
-/* Take: pfnlimit, pgdir, start, pageoffset. */
+/*L:020 The initialization write supplies 4 32-bit values (in addition to the
+ * 32-bit LHREQ_INITIALIZE value). These are:
+ *
+ * pfnlimit: The highest (Guest-physical) page number the Guest should be
+ * allowed to access. The Launcher has to live in Guest memory, so it sets
+ * this to ensure the Guest can't reach it.
+ *
+ * pgdir: The (Guest-physical) address of the top of the initial Guest
+ * pagetables (which are set up by the Launcher).
+ *
+ * start: The first instruction to execute ("eip" in x86-speak).
+ *
+ * page_offset: The PAGE_OFFSET constant in the Guest kernel. We should
+ * probably wean the code off this, but it's a very useful constant! Any
+ * address above this is within the Guest kernel, and any kernel address can
+ * quickly converted from physical to virtual by adding PAGE_OFFSET. It's
+ * 0xC0000000 (3G) by default, but it's configurable at kernel build time.
+ */
static int initialize(struct file *file, const u32 __user *input)
{
+ /* "struct lguest" contains everything we (the Host) know about a
+ * Guest. */
struct lguest *lg;
int err, i;
u32 args[4];
/* We grab the Big Lguest lock, which protects the global array
* "lguests" and multiple simultaneous initializations. */
mutex_lock(&lguest_lock);
-
+ /* You can't initialize twice! Close the device and start again... */
if (file->private_data) {
err = -EBUSY;
goto unlock;
goto unlock;
}
+ /* Find an unused guest. */
i = find_free_guest();
if (i < 0) {
err = -ENOSPC;
goto unlock;
}
+ /* OK, we have an index into the "lguest" array: "lg" is a convenient
+ * pointer. */
lg = &lguests[i];
+
+ /* Populate the easy fields of our "struct lguest" */
lg->guestid = i;
lg->pfn_limit = args[0];
lg->page_offset = args[3];
+
+ /* We need a complete page for the Guest registers: they are accessible
+ * to the Guest and we can only grant it access to whole pages. */
lg->regs_page = get_zeroed_page(GFP_KERNEL);
if (!lg->regs_page) {
err = -ENOMEM;
goto release_guest;
}
+ /* We actually put the registers at the bottom of the page. */
lg->regs = (void *)lg->regs_page + PAGE_SIZE - sizeof(*lg->regs);
+ /* Initialize the Guest's shadow page tables, using the toplevel
+ * address the Launcher gave us. This allocates memory, so can
+ * fail. */
err = init_guest_pagetable(lg, args[1]);
if (err)
goto free_regs;
+ /* Now we initialize the Guest's registers, handing it the start
+ * address. */
setup_regs(lg->regs, args[2]);
+
+ /* There are a couple of GDT entries the Guest expects when first
+ * booting. */
setup_guest_gdt(lg);
+
+ /* The timer for lguest's clock needs initialization. */
init_clockdev(lg);
+
+ /* We keep a pointer to the Launcher task (ie. current task) for when
+ * other Guests want to wake this one (inter-Guest I/O). */
lg->tsk = current;
+ /* We need to keep a pointer to the Launcher's memory map, because if
+ * the Launcher dies we need to clean it up. If we don't keep a
+ * reference, it is destroyed before close() is called. */
lg->mm = get_task_mm(lg->tsk);
+
+ /* Initialize the queue for the waker to wait on */
init_waitqueue_head(&lg->break_wq);
+
+ /* We remember which CPU's pages this Guest used last, for optimization
+ * when the same Guest runs on the same CPU twice. */
lg->last_pages = NULL;
+
+ /* We keep our "struct lguest" in the file's private_data. */
file->private_data = lg;
mutex_unlock(&lguest_lock);
+ /* And because this is a write() call, we return the length used. */
return sizeof(args);
free_regs:
return err;
}
+/*L:010 The first operation the Launcher does must be a write. All writes
+ * start with a 32 bit number: for the first write this must be
+ * LHREQ_INITIALIZE to set up the Guest. After that the Launcher can use
+ * writes of other values to get DMA buffers and send interrupts. */
static ssize_t write(struct file *file, const char __user *input,
size_t size, loff_t *off)
{
+ /* Once the guest is initialized, we hold the "struct lguest" in the
+ * file private data. */
struct lguest *lg = file->private_data;
u32 req;
return -EFAULT;
input += sizeof(req);
+ /* If you haven't initialized, you must do that first. */
if (req != LHREQ_INITIALIZE && !lg)
return -EINVAL;
+
+ /* Once the Guest is dead, all you can do is read() why it died. */
if (lg && lg->dead)
return -ENOENT;
}
}
+/*L:060 The final piece of interface code is the close() routine. It reverses
+ * everything done in initialize(). This is usually called because the
+ * Launcher exited.
+ *
+ * Note that the close routine returns 0 or a negative error number: it can't
+ * really fail, but it can whine. I blame Sun for this wart, and K&R C for
+ * letting them do it. :*/
static int close(struct inode *inode, struct file *file)
{
struct lguest *lg = file->private_data;
+ /* If we never successfully initialized, there's nothing to clean up */
if (!lg)
return 0;
+ /* We need the big lock, to protect from inter-guest I/O and other
+ * Launchers initializing guests. */
mutex_lock(&lguest_lock);
/* Cancels the hrtimer set via LHCALL_SET_CLOCKEVENT. */
hrtimer_cancel(&lg->hrt);
+ /* Free any DMA buffers the Guest had bound. */
release_all_dma(lg);
+ /* Free up the shadow page tables for the Guest. */
free_guest_pagetable(lg);
+ /* Now all the memory cleanups are done, it's safe to release the
+ * Launcher's memory management structure. */
mmput(lg->mm);
+ /* If lg->dead doesn't contain an error code it will be NULL or a
+ * kmalloc()ed string, either of which is ok to hand to kfree(). */
if (!IS_ERR(lg->dead))
kfree(lg->dead);
+ /* We can free up the register page we allocated. */
free_page(lg->regs_page);
+ /* We clear the entire structure, which also marks it as free for the
+ * next user. */
memset(lg, 0, sizeof(*lg));
+ /* Release lock and exit. */
mutex_unlock(&lguest_lock);
+
return 0;
}
+/*L:000
+ * Welcome to our journey through the Launcher!
+ *
+ * The Launcher is the Host userspace program which sets up, runs and services
+ * the Guest. In fact, many comments in the Drivers which refer to "the Host"
+ * doing things are inaccurate: the Launcher does all the device handling for
+ * the Guest. The Guest can't tell what's done by the the Launcher and what by
+ * the Host.
+ *
+ * Just to confuse you: to the Host kernel, the Launcher *is* the Guest and we
+ * shall see more of that later.
+ *
+ * We begin our understanding with the Host kernel interface which the Launcher
+ * uses: reading and writing a character device called /dev/lguest. All the
+ * work happens in the read(), write() and close() routines: */
static struct file_operations lguest_fops = {
.owner = THIS_MODULE,
.release = close,
.write = write,
.read = read,
};
+
+/* This is a textbook example of a "misc" character device. Populate a "struct
+ * miscdevice" and register it with misc_register(). */
static struct miscdevice lguest_dev = {
.minor = MISC_DYNAMIC_MINOR,
.name = "lguest",
-/* Shadow page table operations.
- * Copyright (C) Rusty Russell IBM Corporation 2006.
+/*P:700 The pagetable code, on the other hand, still shows the scars of
+ * previous encounters. It's functional, and as neat as it can be in the
+ * circumstances, but be wary, for these things are subtle and break easily.
+ * The Guest provides a virtual to physical mapping, but we can neither trust
+ * it nor use it: we verify and convert it here to point the hardware to the
+ * actual Guest pages when running the Guest. :*/
+
+/* Copyright (C) Rusty Russell IBM Corporation 2006.
* GPL v2 and any later version */
#include <linux/mm.h>
#include <linux/types.h>
#include <asm/tlbflush.h>
#include "lg.h"
+/*M:008 We hold reference to pages, which prevents them from being swapped.
+ * It'd be nice to have a callback in the "struct mm_struct" when Linux wants
+ * to swap out. If we had this, and a shrinker callback to trim PTE pages, we
+ * could probably consider launching Guests as non-root. :*/
+
+/*H:300
+ * The Page Table Code
+ *
+ * We use two-level page tables for the Guest. If you're not entirely
+ * comfortable with virtual addresses, physical addresses and page tables then
+ * I recommend you review lguest.c's "Page Table Handling" (with diagrams!).
+ *
+ * The Guest keeps page tables, but we maintain the actual ones here: these are
+ * called "shadow" page tables. Which is a very Guest-centric name: these are
+ * the real page tables the CPU uses, although we keep them up to date to
+ * reflect the Guest's. (See what I mean about weird naming? Since when do
+ * shadows reflect anything?)
+ *
+ * Anyway, this is the most complicated part of the Host code. There are seven
+ * parts to this:
+ * (i) Setting up a page table entry for the Guest when it faults,
+ * (ii) Setting up the page table entry for the Guest stack,
+ * (iii) Setting up a page table entry when the Guest tells us it has changed,
+ * (iv) Switching page tables,
+ * (v) Flushing (thowing away) page tables,
+ * (vi) Mapping the Switcher when the Guest is about to run,
+ * (vii) Setting up the page tables initially.
+ :*/
+
+/* Pages a 4k long, and each page table entry is 4 bytes long, giving us 1024
+ * (or 2^10) entries per page. */
#define PTES_PER_PAGE_SHIFT 10
#define PTES_PER_PAGE (1 << PTES_PER_PAGE_SHIFT)
+
+/* 1024 entries in a page table page maps 1024 pages: 4MB. The Switcher is
+ * conveniently placed at the top 4MB, so it uses a separate, complete PTE
+ * page. */
#define SWITCHER_PGD_INDEX (PTES_PER_PAGE - 1)
+/* We actually need a separate PTE page for each CPU. Remember that after the
+ * Switcher code itself comes two pages for each CPU, and we don't want this
+ * CPU's guest to see the pages of any other CPU. */
static DEFINE_PER_CPU(spte_t *, switcher_pte_pages);
#define switcher_pte_page(cpu) per_cpu(switcher_pte_pages, cpu)
+/*H:320 With our shadow and Guest types established, we need to deal with
+ * them: the page table code is curly enough to need helper functions to keep
+ * it clear and clean.
+ *
+ * The first helper takes a virtual address, and says which entry in the top
+ * level page table deals with that address. Since each top level entry deals
+ * with 4M, this effectively divides by 4M. */
static unsigned vaddr_to_pgd_index(unsigned long vaddr)
{
return vaddr >> (PAGE_SHIFT + PTES_PER_PAGE_SHIFT);
}
-/* These access the shadow versions (ie. the ones used by the CPU). */
+/* There are two functions which return pointers to the shadow (aka "real")
+ * page tables.
+ *
+ * spgd_addr() takes the virtual address and returns a pointer to the top-level
+ * page directory entry for that address. Since we keep track of several page
+ * tables, the "i" argument tells us which one we're interested in (it's
+ * usually the current one). */
static spgd_t *spgd_addr(struct lguest *lg, u32 i, unsigned long vaddr)
{
unsigned int index = vaddr_to_pgd_index(vaddr);
+ /* We kill any Guest trying to touch the Switcher addresses. */
if (index >= SWITCHER_PGD_INDEX) {
kill_guest(lg, "attempt to access switcher pages");
index = 0;
}
+ /* Return a pointer index'th pgd entry for the i'th page table. */
return &lg->pgdirs[i].pgdir[index];
}
+/* This routine then takes the PGD entry given above, which contains the
+ * address of the PTE page. It then returns a pointer to the PTE entry for the
+ * given address. */
static spte_t *spte_addr(struct lguest *lg, spgd_t spgd, unsigned long vaddr)
{
spte_t *page = __va(spgd.pfn << PAGE_SHIFT);
+ /* You should never call this if the PGD entry wasn't valid */
BUG_ON(!(spgd.flags & _PAGE_PRESENT));
return &page[(vaddr >> PAGE_SHIFT) % PTES_PER_PAGE];
}
-/* These access the guest versions. */
+/* These two functions just like the above two, except they access the Guest
+ * page tables. Hence they return a Guest address. */
static unsigned long gpgd_addr(struct lguest *lg, unsigned long vaddr)
{
unsigned int index = vaddr >> (PAGE_SHIFT + PTES_PER_PAGE_SHIFT);
return gpage + ((vaddr>>PAGE_SHIFT) % PTES_PER_PAGE) * sizeof(gpte_t);
}
-/* Do a virtual -> physical mapping on a user page. */
+/*H:350 This routine takes a page number given by the Guest and converts it to
+ * an actual, physical page number. It can fail for several reasons: the
+ * virtual address might not be mapped by the Launcher, the write flag is set
+ * and the page is read-only, or the write flag was set and the page was
+ * shared so had to be copied, but we ran out of memory.
+ *
+ * This holds a reference to the page, so release_pte() is careful to
+ * put that back. */
static unsigned long get_pfn(unsigned long virtpfn, int write)
{
struct page *page;
+ /* This value indicates failure. */
unsigned long ret = -1UL;
+ /* get_user_pages() is a complex interface: it gets the "struct
+ * vm_area_struct" and "struct page" assocated with a range of pages.
+ * It also needs the task's mmap_sem held, and is not very quick.
+ * It returns the number of pages it got. */
down_read(¤t->mm->mmap_sem);
if (get_user_pages(current, current->mm, virtpfn << PAGE_SHIFT,
1, write, 1, &page, NULL) == 1)
return ret;
}
+/*H:340 Converting a Guest page table entry to a shadow (ie. real) page table
+ * entry can be a little tricky. The flags are (almost) the same, but the
+ * Guest PTE contains a virtual page number: the CPU needs the real page
+ * number. */
static spte_t gpte_to_spte(struct lguest *lg, gpte_t gpte, int write)
{
spte_t spte;
unsigned long pfn;
- /* We ignore the global flag. */
+ /* The Guest sets the global flag, because it thinks that it is using
+ * PGE. We only told it to use PGE so it would tell us whether it was
+ * flushing a kernel mapping or a userspace mapping. We don't actually
+ * use the global bit, so throw it away. */
spte.flags = (gpte.flags & ~_PAGE_GLOBAL);
+
+ /* We need a temporary "unsigned long" variable to hold the answer from
+ * get_pfn(), because it returns 0xFFFFFFFF on failure, which wouldn't
+ * fit in spte.pfn. get_pfn() finds the real physical number of the
+ * page, given the virtual number. */
pfn = get_pfn(gpte.pfn, write);
if (pfn == -1UL) {
kill_guest(lg, "failed to get page %u", gpte.pfn);
- /* Must not put_page() bogus page on cleanup. */
+ /* When we destroy the Guest, we'll go through the shadow page
+ * tables and release_pte() them. Make sure we don't think
+ * this one is valid! */
spte.flags = 0;
}
+ /* Now we assign the page number, and our shadow PTE is complete. */
spte.pfn = pfn;
return spte;
}
+/*H:460 And to complete the chain, release_pte() looks like this: */
static void release_pte(spte_t pte)
{
+ /* Remember that get_user_pages() took a reference to the page, in
+ * get_pfn()? We have to put it back now. */
if (pte.flags & _PAGE_PRESENT)
put_page(pfn_to_page(pte.pfn));
}
+/*:*/
static void check_gpte(struct lguest *lg, gpte_t gpte)
{
kill_guest(lg, "bad page directory entry");
}
-/* FIXME: We hold reference to pages, which prevents them from being
- swapped. It'd be nice to have a callback when Linux wants to swap out. */
-
-/* We fault pages in, which allows us to update accessed/dirty bits.
- * Return true if we got page. */
+/*H:330
+ * (i) Setting up a page table entry for the Guest when it faults
+ *
+ * We saw this call in run_guest(): when we see a page fault in the Guest, we
+ * come here. That's because we only set up the shadow page tables lazily as
+ * they're needed, so we get page faults all the time and quietly fix them up
+ * and return to the Guest without it knowing.
+ *
+ * If we fixed up the fault (ie. we mapped the address), this routine returns
+ * true. */
int demand_page(struct lguest *lg, unsigned long vaddr, int errcode)
{
gpgd_t gpgd;
gpte_t gpte;
spte_t *spte;
+ /* First step: get the top-level Guest page table entry. */
gpgd = mkgpgd(lgread_u32(lg, gpgd_addr(lg, vaddr)));
+ /* Toplevel not present? We can't map it in. */
if (!(gpgd.flags & _PAGE_PRESENT))
return 0;
+ /* Now look at the matching shadow entry. */
spgd = spgd_addr(lg, lg->pgdidx, vaddr);
if (!(spgd->flags & _PAGE_PRESENT)) {
- /* Get a page of PTEs for them. */
+ /* No shadow entry: allocate a new shadow PTE page. */
unsigned long ptepage = get_zeroed_page(GFP_KERNEL);
- /* FIXME: Steal from self in this case? */
+ /* This is not really the Guest's fault, but killing it is
+ * simple for this corner case. */
if (!ptepage) {
kill_guest(lg, "out of memory allocating pte page");
return 0;
}
+ /* We check that the Guest pgd is OK. */
check_gpgd(lg, gpgd);
+ /* And we copy the flags to the shadow PGD entry. The page
+ * number in the shadow PGD is the page we just allocated. */
spgd->raw.val = (__pa(ptepage) | gpgd.flags);
}
+ /* OK, now we look at the lower level in the Guest page table: keep its
+ * address, because we might update it later. */
gpte_ptr = gpte_addr(lg, gpgd, vaddr);
gpte = mkgpte(lgread_u32(lg, gpte_ptr));
- /* No page? */
+ /* If this page isn't in the Guest page tables, we can't page it in. */
if (!(gpte.flags & _PAGE_PRESENT))
return 0;
- /* Write to read-only page? */
+ /* Check they're not trying to write to a page the Guest wants
+ * read-only (bit 2 of errcode == write). */
if ((errcode & 2) && !(gpte.flags & _PAGE_RW))
return 0;
- /* User access to a non-user page? */
+ /* User access to a kernel page? (bit 3 == user access) */
if ((errcode & 4) && !(gpte.flags & _PAGE_USER))
return 0;
+ /* Check that the Guest PTE flags are OK, and the page number is below
+ * the pfn_limit (ie. not mapping the Launcher binary). */
check_gpte(lg, gpte);
+ /* Add the _PAGE_ACCESSED and (for a write) _PAGE_DIRTY flag */
gpte.flags |= _PAGE_ACCESSED;
if (errcode & 2)
gpte.flags |= _PAGE_DIRTY;
- /* We're done with the old pte. */
+ /* Get the pointer to the shadow PTE entry we're going to set. */
spte = spte_addr(lg, *spgd, vaddr);
+ /* If there was a valid shadow PTE entry here before, we release it.
+ * This can happen with a write to a previously read-only entry. */
release_pte(*spte);
- /* We don't make it writable if this isn't a write: later
- * write will fault so we can set dirty bit in guest. */
+ /* If this is a write, we insist that the Guest page is writable (the
+ * final arg to gpte_to_spte()). */
if (gpte.flags & _PAGE_DIRTY)
*spte = gpte_to_spte(lg, gpte, 1);
else {
+ /* If this is a read, don't set the "writable" bit in the page
+ * table entry, even if the Guest says it's writable. That way
+ * we come back here when a write does actually ocur, so we can
+ * update the Guest's _PAGE_DIRTY flag. */
gpte_t ro_gpte = gpte;
ro_gpte.flags &= ~_PAGE_RW;
*spte = gpte_to_spte(lg, ro_gpte, 0);
}
- /* Now we update dirty/accessed on guest. */
+ /* Finally, we write the Guest PTE entry back: we've set the
+ * _PAGE_ACCESSED and maybe the _PAGE_DIRTY flags. */
lgwrite_u32(lg, gpte_ptr, gpte.raw.val);
+
+ /* We succeeded in mapping the page! */
return 1;
}
-/* This is much faster than the full demand_page logic. */
+/*H:360 (ii) Setting up the page table entry for the Guest stack.
+ *
+ * Remember pin_stack_pages() which makes sure the stack is mapped? It could
+ * simply call demand_page(), but as we've seen that logic is quite long, and
+ * usually the stack pages are already mapped anyway, so it's not required.
+ *
+ * This is a quick version which answers the question: is this virtual address
+ * mapped by the shadow page tables, and is it writable? */
static int page_writable(struct lguest *lg, unsigned long vaddr)
{
spgd_t *spgd;
unsigned long flags;
+ /* Look at the top level entry: is it present? */
spgd = spgd_addr(lg, lg->pgdidx, vaddr);
if (!(spgd->flags & _PAGE_PRESENT))
return 0;
+ /* Check the flags on the pte entry itself: it must be present and
+ * writable. */
flags = spte_addr(lg, *spgd, vaddr)->flags;
return (flags & (_PAGE_PRESENT|_PAGE_RW)) == (_PAGE_PRESENT|_PAGE_RW);
}
+/* So, when pin_stack_pages() asks us to pin a page, we check if it's already
+ * in the page tables, and if not, we call demand_page() with error code 2
+ * (meaning "write"). */
void pin_page(struct lguest *lg, unsigned long vaddr)
{
if (!page_writable(lg, vaddr) && !demand_page(lg, vaddr, 2))
kill_guest(lg, "bad stack page %#lx", vaddr);
}
+/*H:450 If we chase down the release_pgd() code, it looks like this: */
static void release_pgd(struct lguest *lg, spgd_t *spgd)
{
+ /* If the entry's not present, there's nothing to release. */
if (spgd->flags & _PAGE_PRESENT) {
unsigned int i;
+ /* Converting the pfn to find the actual PTE page is easy: turn
+ * the page number into a physical address, then convert to a
+ * virtual address (easy for kernel pages like this one). */
spte_t *ptepage = __va(spgd->pfn << PAGE_SHIFT);
+ /* For each entry in the page, we might need to release it. */
for (i = 0; i < PTES_PER_PAGE; i++)
release_pte(ptepage[i]);
+ /* Now we can free the page of PTEs */
free_page((long)ptepage);
+ /* And zero out the PGD entry we we never release it twice. */
spgd->raw.val = 0;
}
}
+/*H:440 (v) Flushing (thowing away) page tables,
+ *
+ * We saw flush_user_mappings() called when we re-used a top-level pgdir page.
+ * It simply releases every PTE page from 0 up to the kernel address. */
static void flush_user_mappings(struct lguest *lg, int idx)
{
unsigned int i;
+ /* Release every pgd entry up to the kernel's address. */
for (i = 0; i < vaddr_to_pgd_index(lg->page_offset); i++)
release_pgd(lg, lg->pgdirs[idx].pgdir + i);
}
+/* The Guest also has a hypercall to do this manually: it's used when a large
+ * number of mappings have been changed. */
void guest_pagetable_flush_user(struct lguest *lg)
{
+ /* Drop the userspace part of the current page table. */
flush_user_mappings(lg, lg->pgdidx);
}
+/*:*/
+/* We keep several page tables. This is a simple routine to find the page
+ * table (if any) corresponding to this top-level address the Guest has given
+ * us. */
static unsigned int find_pgdir(struct lguest *lg, unsigned long pgtable)
{
unsigned int i;
return i;
}
+/*H:435 And this is us, creating the new page directory. If we really do
+ * allocate a new one (and so the kernel parts are not there), we set
+ * blank_pgdir. */
static unsigned int new_pgdir(struct lguest *lg,
unsigned long cr3,
int *blank_pgdir)
{
unsigned int next;
+ /* We pick one entry at random to throw out. Choosing the Least
+ * Recently Used might be better, but this is easy. */
next = random32() % ARRAY_SIZE(lg->pgdirs);
+ /* If it's never been allocated at all before, try now. */
if (!lg->pgdirs[next].pgdir) {
lg->pgdirs[next].pgdir = (spgd_t *)get_zeroed_page(GFP_KERNEL);
+ /* If the allocation fails, just keep using the one we have */
if (!lg->pgdirs[next].pgdir)
next = lg->pgdidx;
else
- /* There are no mappings: you'll need to re-pin */
+ /* This is a blank page, so there are no kernel
+ * mappings: caller must map the stack! */
*blank_pgdir = 1;
}
+ /* Record which Guest toplevel this shadows. */
lg->pgdirs[next].cr3 = cr3;
/* Release all the non-kernel mappings. */
flush_user_mappings(lg, next);
return next;
}
+/*H:430 (iv) Switching page tables
+ *
+ * This is what happens when the Guest changes page tables (ie. changes the
+ * top-level pgdir). This happens on almost every context switch. */
void guest_new_pagetable(struct lguest *lg, unsigned long pgtable)
{
int newpgdir, repin = 0;
+ /* Look to see if we have this one already. */
newpgdir = find_pgdir(lg, pgtable);
+ /* If not, we allocate or mug an existing one: if it's a fresh one,
+ * repin gets set to 1. */
if (newpgdir == ARRAY_SIZE(lg->pgdirs))
newpgdir = new_pgdir(lg, pgtable, &repin);
+ /* Change the current pgd index to the new one. */
lg->pgdidx = newpgdir;
+ /* If it was completely blank, we map in the Guest kernel stack */
if (repin)
pin_stack_pages(lg);
}
+/*H:470 Finally, a routine which throws away everything: all PGD entries in all
+ * the shadow page tables. This is used when we destroy the Guest. */
static void release_all_pagetables(struct lguest *lg)
{
unsigned int i, j;
+ /* Every shadow pagetable this Guest has */
for (i = 0; i < ARRAY_SIZE(lg->pgdirs); i++)
if (lg->pgdirs[i].pgdir)
+ /* Every PGD entry except the Switcher at the top */
for (j = 0; j < SWITCHER_PGD_INDEX; j++)
release_pgd(lg, lg->pgdirs[i].pgdir + j);
}
+/* We also throw away everything when a Guest tells us it's changed a kernel
+ * mapping. Since kernel mappings are in every page table, it's easiest to
+ * throw them all away. This is amazingly slow, but thankfully rare. */
void guest_pagetable_clear_all(struct lguest *lg)
{
release_all_pagetables(lg);
+ /* We need the Guest kernel stack mapped again. */
pin_stack_pages(lg);
}
+/*H:420 This is the routine which actually sets the page table entry for then
+ * "idx"'th shadow page table.
+ *
+ * Normally, we can just throw out the old entry and replace it with 0: if they
+ * use it demand_page() will put the new entry in. We need to do this anyway:
+ * The Guest expects _PAGE_ACCESSED to be set on its PTE the first time a page
+ * is read from, and _PAGE_DIRTY when it's written to.
+ *
+ * But Avi Kivity pointed out that most Operating Systems (Linux included) set
+ * these bits on PTEs immediately anyway. This is done to save the CPU from
+ * having to update them, but it helps us the same way: if they set
+ * _PAGE_ACCESSED then we can put a read-only PTE entry in immediately, and if
+ * they set _PAGE_DIRTY then we can put a writable PTE entry in immediately.
+ */
static void do_set_pte(struct lguest *lg, int idx,
unsigned long vaddr, gpte_t gpte)
{
+ /* Look up the matching shadow page directot entry. */
spgd_t *spgd = spgd_addr(lg, idx, vaddr);
+
+ /* If the top level isn't present, there's no entry to update. */
if (spgd->flags & _PAGE_PRESENT) {
+ /* Otherwise, we start by releasing the existing entry. */
spte_t *spte = spte_addr(lg, *spgd, vaddr);
release_pte(*spte);
+
+ /* If they're setting this entry as dirty or accessed, we might
+ * as well put that entry they've given us in now. This shaves
+ * 10% off a copy-on-write micro-benchmark. */
if (gpte.flags & (_PAGE_DIRTY | _PAGE_ACCESSED)) {
check_gpte(lg, gpte);
*spte = gpte_to_spte(lg, gpte, gpte.flags&_PAGE_DIRTY);
} else
+ /* Otherwise we can demand_page() it in later. */
spte->raw.val = 0;
}
}
+/*H:410 Updating a PTE entry is a little trickier.
+ *
+ * We keep track of several different page tables (the Guest uses one for each
+ * process, so it makes sense to cache at least a few). Each of these have
+ * identical kernel parts: ie. every mapping above PAGE_OFFSET is the same for
+ * all processes. So when the page table above that address changes, we update
+ * all the page tables, not just the current one. This is rare.
+ *
+ * The benefit is that when we have to track a new page table, we can copy keep
+ * all the kernel mappings. This speeds up context switch immensely. */
void guest_set_pte(struct lguest *lg,
unsigned long cr3, unsigned long vaddr, gpte_t gpte)
{
- /* Kernel mappings must be changed on all top levels. */
+ /* Kernel mappings must be changed on all top levels. Slow, but
+ * doesn't happen often. */
if (vaddr >= lg->page_offset) {
unsigned int i;
for (i = 0; i < ARRAY_SIZE(lg->pgdirs); i++)
if (lg->pgdirs[i].pgdir)
do_set_pte(lg, i, vaddr, gpte);
} else {
+ /* Is this page table one we have a shadow for? */
int pgdir = find_pgdir(lg, cr3);
if (pgdir != ARRAY_SIZE(lg->pgdirs))
+ /* If so, do the update. */
do_set_pte(lg, pgdir, vaddr, gpte);
}
}
+/*H:400
+ * (iii) Setting up a page table entry when the Guest tells us it has changed.
+ *
+ * Just like we did in interrupts_and_traps.c, it makes sense for us to deal
+ * with the other side of page tables while we're here: what happens when the
+ * Guest asks for a page table to be updated?
+ *
+ * We already saw that demand_page() will fill in the shadow page tables when
+ * needed, so we can simply remove shadow page table entries whenever the Guest
+ * tells us they've changed. When the Guest tries to use the new entry it will
+ * fault and demand_page() will fix it up.
+ *
+ * So with that in mind here's our code to to update a (top-level) PGD entry:
+ */
void guest_set_pmd(struct lguest *lg, unsigned long cr3, u32 idx)
{
int pgdir;
+ /* The kernel seems to try to initialize this early on: we ignore its
+ * attempts to map over the Switcher. */
if (idx >= SWITCHER_PGD_INDEX)
return;
+ /* If they're talking about a page table we have a shadow for... */
pgdir = find_pgdir(lg, cr3);
if (pgdir < ARRAY_SIZE(lg->pgdirs))
+ /* ... throw it away. */
release_pgd(lg, lg->pgdirs[pgdir].pgdir + idx);
}
+/*H:500 (vii) Setting up the page tables initially.
+ *
+ * When a Guest is first created, the Launcher tells us where the toplevel of
+ * its first page table is. We set some things up here: */
int init_guest_pagetable(struct lguest *lg, unsigned long pgtable)
{
- /* We assume this in flush_user_mappings, so check now */
+ /* In flush_user_mappings() we loop from 0 to
+ * "vaddr_to_pgd_index(lg->page_offset)". This assumes it won't hit
+ * the Switcher mappings, so check that now. */
if (vaddr_to_pgd_index(lg->page_offset) >= SWITCHER_PGD_INDEX)
return -EINVAL;
+ /* We start on the first shadow page table, and give it a blank PGD
+ * page. */
lg->pgdidx = 0;
lg->pgdirs[lg->pgdidx].cr3 = pgtable;
lg->pgdirs[lg->pgdidx].pgdir = (spgd_t*)get_zeroed_page(GFP_KERNEL);
return 0;
}
+/* When a Guest dies, our cleanup is fairly simple. */
void free_guest_pagetable(struct lguest *lg)
{
unsigned int i;
+ /* Throw away all page table pages. */
release_all_pagetables(lg);
+ /* Now free the top levels: free_page() can handle 0 just fine. */
for (i = 0; i < ARRAY_SIZE(lg->pgdirs); i++)
free_page((long)lg->pgdirs[i].pgdir);
}
-/* Caller must be preempt-safe */
+/*H:480 (vi) Mapping the Switcher when the Guest is about to run.
+ *
+ * The Switcher and the two pages for this CPU need to be available to the
+ * Guest (and not the pages for other CPUs). We have the appropriate PTE pages
+ * for each CPU already set up, we just need to hook them in. */
void map_switcher_in_guest(struct lguest *lg, struct lguest_pages *pages)
{
spte_t *switcher_pte_page = __get_cpu_var(switcher_pte_pages);
spgd_t switcher_pgd;
spte_t regs_pte;
- /* Since switcher less that 4MB, we simply mug top pte page. */
+ /* Make the last PGD entry for this Guest point to the Switcher's PTE
+ * page for this CPU (with appropriate flags). */
switcher_pgd.pfn = __pa(switcher_pte_page) >> PAGE_SHIFT;
switcher_pgd.flags = _PAGE_KERNEL;
lg->pgdirs[lg->pgdidx].pgdir[SWITCHER_PGD_INDEX] = switcher_pgd;
- /* Map our regs page over stack page. */
+ /* We also change the Switcher PTE page. When we're running the Guest,
+ * we want the Guest's "regs" page to appear where the first Switcher
+ * page for this CPU is. This is an optimization: when the Switcher
+ * saves the Guest registers, it saves them into the first page of this
+ * CPU's "struct lguest_pages": if we make sure the Guest's register
+ * page is already mapped there, we don't have to copy them out
+ * again. */
regs_pte.pfn = __pa(lg->regs_page) >> PAGE_SHIFT;
regs_pte.flags = _PAGE_KERNEL;
switcher_pte_page[(unsigned long)pages/PAGE_SIZE%PTES_PER_PAGE]
= regs_pte;
}
+/*:*/
static void free_switcher_pte_pages(void)
{
free_page((long)switcher_pte_page(i));
}
+/*H:520 Setting up the Switcher PTE page for given CPU is fairly easy, given
+ * the CPU number and the "struct page"s for the Switcher code itself.
+ *
+ * Currently the Switcher is less than a page long, so "pages" is always 1. */
static __init void populate_switcher_pte_page(unsigned int cpu,
struct page *switcher_page[],
unsigned int pages)
unsigned int i;
spte_t *pte = switcher_pte_page(cpu);
+ /* The first entries are easy: they map the Switcher code. */
for (i = 0; i < pages; i++) {
pte[i].pfn = page_to_pfn(switcher_page[i]);
pte[i].flags = _PAGE_PRESENT|_PAGE_ACCESSED;
}
- /* We only map this CPU's pages, so guest can't see others. */
+ /* The only other thing we map is this CPU's pair of pages. */
i = pages + cpu*2;
- /* First page (regs) is rw, second (state) is ro. */
+ /* First page (Guest registers) is writable from the Guest */
pte[i].pfn = page_to_pfn(switcher_page[i]);
pte[i].flags = _PAGE_PRESENT|_PAGE_ACCESSED|_PAGE_RW;
+ /* The second page contains the "struct lguest_ro_state", and is
+ * read-only. */
pte[i+1].pfn = page_to_pfn(switcher_page[i+1]);
pte[i+1].flags = _PAGE_PRESENT|_PAGE_ACCESSED;
}
+/*H:510 At boot or module load time, init_pagetables() allocates and populates
+ * the Switcher PTE page for each CPU. */
__init int init_pagetables(struct page **switcher_page, unsigned int pages)
{
unsigned int i;
}
return 0;
}
+/*:*/
+/* Cleaning up simply involves freeing the PTE page for each CPU. */
void free_pagetables(void)
{
free_switcher_pte_pages();
+/*P:600 The x86 architecture has segments, which involve a table of descriptors
+ * which can be used to do funky things with virtual address interpretation.
+ * We originally used to use segments so the Guest couldn't alter the
+ * Guest<->Host Switcher, and then we had to trim Guest segments, and restore
+ * for userspace per-thread segments, but trim again for on userspace->kernel
+ * transitions... This nightmarish creation was contained within this file,
+ * where we knew not to tread without heavy armament and a change of underwear.
+ *
+ * In these modern times, the segment handling code consists of simple sanity
+ * checks, and the worst you'll experience reading this code is butterfly-rash
+ * from frolicking through its parklike serenity. :*/
#include "lg.h"
+/*H:600
+ * We've almost completed the Host; there's just one file to go!
+ *
+ * Segments & The Global Descriptor Table
+ *
+ * (That title sounds like a bad Nerdcore group. Not to suggest that there are
+ * any good Nerdcore groups, but in high school a friend of mine had a band
+ * called Joe Fish and the Chips, so there are definitely worse band names).
+ *
+ * To refresh: the GDT is a table of 8-byte values describing segments. Once
+ * set up, these segments can be loaded into one of the 6 "segment registers".
+ *
+ * GDT entries are passed around as "struct desc_struct"s, which like IDT
+ * entries are split into two 32-bit members, "a" and "b". One day, someone
+ * will clean that up, and be declared a Hero. (No pressure, I'm just saying).
+ *
+ * Anyway, the GDT entry contains a base (the start address of the segment), a
+ * limit (the size of the segment - 1), and some flags. Sounds simple, and it
+ * would be, except those zany Intel engineers decided that it was too boring
+ * to put the base at one end, the limit at the other, and the flags in
+ * between. They decided to shotgun the bits at random throughout the 8 bytes,
+ * like so:
+ *
+ * 0 16 40 48 52 56 63
+ * [ limit part 1 ][ base part 1 ][ flags ][li][fl][base ]
+ * mit ags part 2
+ * part 2
+ *
+ * As a result, this file contains a certain amount of magic numeracy. Let's
+ * begin.
+ */
+
+/* Is the descriptor the Guest wants us to put in OK?
+ *
+ * The flag which Intel says must be zero: must be zero. The descriptor must
+ * be present, (this is actually checked earlier but is here for thorougness),
+ * and the descriptor type must be 1 (a memory segment). */
static int desc_ok(const struct desc_struct *gdt)
{
- /* MBZ=0, P=1, DT=1 */
return ((gdt->b & 0x00209000) == 0x00009000);
}
+/* Is the segment present? (Otherwise it can't be used by the Guest). */
static int segment_present(const struct desc_struct *gdt)
{
return gdt->b & 0x8000;
}
+/* There are several entries we don't let the Guest set. The TSS entry is the
+ * "Task State Segment" which controls all kinds of delicate things. The
+ * LGUEST_CS and LGUEST_DS entries are reserved for the Switcher, and the
+ * the Guest can't be trusted to deal with double faults. */
static int ignored_gdt(unsigned int num)
{
return (num == GDT_ENTRY_TSS
|| num == GDT_ENTRY_DOUBLEFAULT_TSS);
}
-/* We don't allow removal of CS, DS or SS; it doesn't make sense. */
+/* If the Guest asks us to remove an entry from the GDT, we have to be careful.
+ * If one of the segment registers is pointing at that entry the Switcher will
+ * crash when it tries to reload the segment registers for the Guest.
+ *
+ * It doesn't make much sense for the Guest to try to remove its own code, data
+ * or stack segments while they're in use: assume that's a Guest bug. If it's
+ * one of the lesser segment registers using the removed entry, we simply set
+ * that register to 0 (unusable). */
static void check_segment_use(struct lguest *lg, unsigned int desc)
{
+ /* GDT entries are 8 bytes long, so we divide to get the index and
+ * ignore the bottom bits. */
if (lg->regs->gs / 8 == desc)
lg->regs->gs = 0;
if (lg->regs->fs / 8 == desc)
|| lg->regs->ss / 8 == desc)
kill_guest(lg, "Removed live GDT entry %u", desc);
}
-
+/*:*/
+/*M:009 We wouldn't need to check for removal of in-use segments if we handled
+ * faults in the Switcher. However, it's probably not a worthwhile
+ * optimization. :*/
+
+/*H:610 Once the GDT has been changed, we look through the changed entries and
+ * see if they're OK. If not, we'll call kill_guest() and the Guest will never
+ * get to use the invalid entries. */
static void fixup_gdt_table(struct lguest *lg, unsigned start, unsigned end)
{
unsigned int i;
for (i = start; i < end; i++) {
- /* We never copy these ones to real gdt */
+ /* We never copy these ones to real GDT, so we don't care what
+ * they say */
if (ignored_gdt(i))
continue;
if (!desc_ok(&lg->gdt[i]))
kill_guest(lg, "Bad GDT descriptor %i", i);
- /* DPL 0 presumably means "for use by guest". */
+ /* Segment descriptors contain a privilege level: the Guest is
+ * sometimes careless and leaves this as 0, even though it's
+ * running at privilege level 1. If so, we fix it here. */
if ((lg->gdt[i].b & 0x00006000) == 0)
lg->gdt[i].b |= (GUEST_PL << 13);
- /* Set accessed bit, since gdt isn't writable. */
+ /* Each descriptor has an "accessed" bit. If we don't set it
+ * now, the CPU will try to set it when the Guest first loads
+ * that entry into a segment register. But the GDT isn't
+ * writable by the Guest, so bad things can happen. */
lg->gdt[i].b |= 0x00000100;
}
}
+/* This routine is called at boot or modprobe time for each CPU to set up the
+ * "constant" GDT entries for Guests running on that CPU. */
void setup_default_gdt_entries(struct lguest_ro_state *state)
{
struct desc_struct *gdt = state->guest_gdt;
unsigned long tss = (unsigned long)&state->guest_tss;
- /* Hypervisor segments. */
+ /* The hypervisor segments are full 0-4G segments, privilege level 0 */
gdt[GDT_ENTRY_LGUEST_CS] = FULL_EXEC_SEGMENT;
gdt[GDT_ENTRY_LGUEST_DS] = FULL_SEGMENT;
- /* This is the one which we *cannot* copy from guest, since tss
- is depended on this lguest_ro_state, ie. this cpu. */
+ /* The TSS segment refers to the TSS entry for this CPU, so we cannot
+ * copy it from the Guest. Forgive the magic flags */
gdt[GDT_ENTRY_TSS].a = 0x00000067 | (tss << 16);
gdt[GDT_ENTRY_TSS].b = 0x00008900 | (tss & 0xFF000000)
| ((tss >> 16) & 0x000000FF);
}
+/* This routine is called before the Guest is run for the first time. */
void setup_guest_gdt(struct lguest *lg)
{
+ /* Start with full 0-4G segments... */
lg->gdt[GDT_ENTRY_KERNEL_CS] = FULL_EXEC_SEGMENT;
lg->gdt[GDT_ENTRY_KERNEL_DS] = FULL_SEGMENT;
+ /* ...except the Guest is allowed to use them, so set the privilege
+ * level appropriately in the flags. */
lg->gdt[GDT_ENTRY_KERNEL_CS].b |= (GUEST_PL << 13);
lg->gdt[GDT_ENTRY_KERNEL_DS].b |= (GUEST_PL << 13);
}
-/* This is a fast version for the common case where only the three TLS entries
- * have changed. */
+/* Like the IDT, we never simply use the GDT the Guest gives us. We set up the
+ * GDTs for each CPU, then we copy across the entries each time we want to run
+ * a different Guest on that CPU. */
+
+/* A partial GDT load, for the three "thead-local storage" entries. Otherwise
+ * it's just like load_guest_gdt(). So much, in fact, it would probably be
+ * neater to have a single hypercall to cover both. */
void copy_gdt_tls(const struct lguest *lg, struct desc_struct *gdt)
{
unsigned int i;
gdt[i] = lg->gdt[i];
}
+/* This is the full version */
void copy_gdt(const struct lguest *lg, struct desc_struct *gdt)
{
unsigned int i;
+ /* The default entries from setup_default_gdt_entries() are not
+ * replaced. See ignored_gdt() above. */
for (i = 0; i < GDT_ENTRIES; i++)
if (!ignored_gdt(i))
gdt[i] = lg->gdt[i];
}
+/* This is where the Guest asks us to load a new GDT (LHCALL_LOAD_GDT). */
void load_guest_gdt(struct lguest *lg, unsigned long table, u32 num)
{
+ /* We assume the Guest has the same number of GDT entries as the
+ * Host, otherwise we'd have to dynamically allocate the Guest GDT. */
if (num > ARRAY_SIZE(lg->gdt))
kill_guest(lg, "too many gdt entries %i", num);
+ /* We read the whole thing in, then fix it up. */
lgread(lg, lg->gdt, table, num * sizeof(lg->gdt[0]));
fixup_gdt_table(lg, 0, ARRAY_SIZE(lg->gdt));
+ /* Mark that the GDT changed so the core knows it has to copy it again,
+ * even if the Guest is run on the same CPU. */
lg->changed |= CHANGED_GDT;
}
fixup_gdt_table(lg, GDT_ENTRY_TLS_MIN, GDT_ENTRY_TLS_MAX+1);
lg->changed |= CHANGED_GDT_TLS;
}
+
+/*
+ * With this, we have finished the Host.
+ *
+ * Five of the seven parts of our task are complete. You have made it through
+ * the Bit of Despair (I think that's somewhere in the page table code,
+ * myself).
+ *
+ * Next, we examine "make Switcher". It's short, but intense.
+ */
-/* This code sits at 0xFFC00000 to do the low-level guest<->host switch.
+/*P:900 This is the Switcher: code which sits at 0xFFC00000 to do the low-level
+ * Guest<->Host switch. It is as simple as it can be made, but it's naturally
+ * very specific to x86.
+ *
+ * You have now completed Preparation. If this has whet your appetite; if you
+ * are feeling invigorated and refreshed then the next, more challenging stage
+ * can be found in "make Guest". :*/
- There is are two pages above us for this CPU (struct lguest_pages).
- The second page (struct lguest_ro_state) becomes read-only after the
- context switch. The first page (the stack for traps) remains writable,
- but while we're in here, the guest cannot be running.
-*/
+/*S:100
+ * Welcome to the Switcher itself!
+ *
+ * This file contains the low-level code which changes the CPU to run the Guest
+ * code, and returns to the Host when something happens. Understand this, and
+ * you understand the heart of our journey.
+ *
+ * Because this is in assembler rather than C, our tale switches from prose to
+ * verse. First I tried limericks:
+ *
+ * There once was an eax reg,
+ * To which our pointer was fed,
+ * It needed an add,
+ * Which asm-offsets.h had
+ * But this limerick is hurting my head.
+ *
+ * Next I tried haikus, but fitting the required reference to the seasons in
+ * every stanza was quickly becoming tiresome:
+ *
+ * The %eax reg
+ * Holds "struct lguest_pages" now:
+ * Cherry blossoms fall.
+ *
+ * Then I started with Heroic Verse, but the rhyming requirement leeched away
+ * the content density and led to some uniquely awful oblique rhymes:
+ *
+ * These constants are coming from struct offsets
+ * For use within the asm switcher text.
+ *
+ * Finally, I settled for something between heroic hexameter, and normal prose
+ * with inappropriate linebreaks. Anyway, it aint no Shakespeare.
+ */
+
+// Not all kernel headers work from assembler
+// But these ones are needed: the ENTRY() define
+// And constants extracted from struct offsets
+// To avoid magic numbers and breakage:
+// Should they change the compiler can't save us
+// Down here in the depths of assembler code.
#include <linux/linkage.h>
#include <asm/asm-offsets.h>
#include "lg.h"
+// We mark the start of the code to copy
+// It's placed in .text tho it's never run here
+// You'll see the trick macro at the end
+// Which interleaves data and text to effect.
.text
ENTRY(start_switcher_text)
-/* %eax points to lguest pages for this CPU. %ebx contains cr3 value.
- All normal registers can be clobbered! */
+// When we reach switch_to_guest we have just left
+// The safe and comforting shores of C code
+// %eax has the "struct lguest_pages" to use
+// Where we save state and still see it from the Guest
+// And %ebx holds the Guest shadow pagetable:
+// Once set we have truly left Host behind.
ENTRY(switch_to_guest)
- /* Save host segments on host stack. */
+ // We told gcc all its regs could fade,
+ // Clobbered by our journey into the Guest
+ // We could have saved them, if we tried
+ // But time is our master and cycles count.
+
+ // Segment registers must be saved for the Host
+ // We push them on the Host stack for later
pushl %es
pushl %ds
pushl %gs
pushl %fs
- /* With CONFIG_FRAME_POINTER, gcc doesn't let us clobber this! */
+ // But the compiler is fickle, and heeds
+ // No warning of %ebp clobbers
+ // When frame pointers are used. That register
+ // Must be saved and restored or chaos strikes.
pushl %ebp
- /* Save host stack. */
+ // The Host's stack is done, now save it away
+ // In our "struct lguest_pages" at offset
+ // Distilled into asm-offsets.h
movl %esp, LGUEST_PAGES_host_sp(%eax)
- /* Switch to guest stack: if we get NMI we expect to be there. */
+
+ // All saved and there's now five steps before us:
+ // Stack, GDT, IDT, TSS
+ // And last of all the page tables are flipped.
+
+ // Yet beware that our stack pointer must be
+ // Always valid lest an NMI hits
+ // %edx does the duty here as we juggle
+ // %eax is lguest_pages: our stack lies within.
movl %eax, %edx
addl $LGUEST_PAGES_regs, %edx
movl %edx, %esp
- /* Switch to guest's GDT, IDT. */
+
+ // The Guest's GDT we so carefully
+ // Placed in the "struct lguest_pages" before
lgdt LGUEST_PAGES_guest_gdt_desc(%eax)
+
+ // The Guest's IDT we did partially
+ // Move to the "struct lguest_pages" as well.
lidt LGUEST_PAGES_guest_idt_desc(%eax)
- /* Switch to guest's TSS while GDT still writable. */
+
+ // The TSS entry which controls traps
+ // Must be loaded up with "ltr" now:
+ // For after we switch over our page tables
+ // It (as the rest) will be writable no more.
+ // (The GDT entry TSS needs
+ // Changes type when we load it: damn Intel!)
movl $(GDT_ENTRY_TSS*8), %edx
ltr %dx
- /* Set host's TSS GDT entry to available (clear byte 5 bit 2). */
+
+ // Look back now, before we take this last step!
+ // The Host's TSS entry was also marked used;
+ // Let's clear it again, ere we return.
+ // The GDT descriptor of the Host
+ // Points to the table after two "size" bytes
movl (LGUEST_PAGES_host_gdt_desc+2)(%eax), %edx
+ // Clear the type field of "used" (byte 5, bit 2)
andb $0xFD, (GDT_ENTRY_TSS*8 + 5)(%edx)
- /* Switch to guest page tables: lguest_pages->state now read-only. */
+
+ // Once our page table's switched, the Guest is live!
+ // The Host fades as we run this final step.
+ // Our "struct lguest_pages" is now read-only.
movl %ebx, %cr3
- /* Restore guest regs */
+
+ // The page table change did one tricky thing:
+ // The Guest's register page has been mapped
+ // Writable onto our %esp (stack) --
+ // We can simply pop off all Guest regs.
popl %ebx
popl %ecx
popl %edx
popl %fs
popl %ds
popl %es
- /* Skip error code and trap number */
+
+ // Near the base of the stack lurk two strange fields
+ // Which we fill as we exit the Guest
+ // These are the trap number and its error
+ // We can simply step past them on our way.
addl $8, %esp
+
+ // The last five stack slots hold return address
+ // And everything needed to change privilege
+ // Into the Guest privilege level of 1,
+ // And the stack where the Guest had last left it.
+ // Interrupts are turned back on: we are Guest.
iret
+// There are two paths where we switch to the Host
+// So we put the routine in a macro.
+// We are on our way home, back to the Host
+// Interrupted out of the Guest, we come here.
#define SWITCH_TO_HOST \
- /* Save guest state */ \
+ /* We save the Guest state: all registers first \
+ * Laid out just as "struct lguest_regs" defines */ \
pushl %es; \
pushl %ds; \
pushl %fs; \
pushl %edx; \
pushl %ecx; \
pushl %ebx; \
- /* Load lguest ds segment for convenience. */ \
+ /* Our stack and our code are using segments \
+ * Set in the TSS and IDT \
+ * Yet if we were to touch data we'd use \
+ * Whatever data segment the Guest had. \
+ * Load the lguest ds segment for now. */ \
movl $(LGUEST_DS), %eax; \
movl %eax, %ds; \
- /* Figure out where we are, based on stack (at top of regs). */ \
+ /* So where are we? Which CPU, which struct? \
+ * The stack is our clue: our TSS sets \
+ * It at the end of "struct lguest_pages" \
+ * And we then pushed and pushed and pushed Guest regs: \
+ * Now stack points atop the "struct lguest_regs". \
+ * Subtract that offset, and we find our struct. */ \
movl %esp, %eax; \
subl $LGUEST_PAGES_regs, %eax; \
- /* Put trap number in %ebx before we switch cr3 and lose it. */ \
+ /* Save our trap number: the switch will obscure it \
+ * (The Guest regs are not mapped here in the Host) \
+ * %ebx holds it safe for deliver_to_host */ \
movl LGUEST_PAGES_regs_trapnum(%eax), %ebx; \
- /* Switch to host page tables (host GDT, IDT and stack are in host \
- mem, so need this first) */ \
+ /* The Host GDT, IDT and stack! \
+ * All these lie safely hidden from the Guest: \
+ * We must return to the Host page tables \
+ * (Hence that was saved in struct lguest_pages) */ \
movl LGUEST_PAGES_host_cr3(%eax), %edx; \
movl %edx, %cr3; \
- /* Set guest's TSS to available (clear byte 5 bit 2). */ \
+ /* As before, when we looked back at the Host \
+ * As we left and marked TSS unused \
+ * So must we now for the Guest left behind. */ \
andb $0xFD, (LGUEST_PAGES_guest_gdt+GDT_ENTRY_TSS*8+5)(%eax); \
- /* Switch to host's GDT & IDT. */ \
+ /* Switch to Host's GDT, IDT. */ \
lgdt LGUEST_PAGES_host_gdt_desc(%eax); \
lidt LGUEST_PAGES_host_idt_desc(%eax); \
- /* Switch to host's stack. */ \
+ /* Restore the Host's stack where it's saved regs lie */ \
movl LGUEST_PAGES_host_sp(%eax), %esp; \
- /* Switch to host's TSS */ \
+ /* Last the TSS: our Host is complete */ \
movl $(GDT_ENTRY_TSS*8), %edx; \
ltr %dx; \
+ /* Restore now the regs saved right at the first. */ \
popl %ebp; \
popl %fs; \
popl %gs; \
popl %ds; \
popl %es
-/* Return to run_guest_once. */
+// Here's where we come when the Guest has just trapped:
+// (Which trap we'll see has been pushed on the stack).
+// We need only switch back, and the Host will decode
+// Why we came home, and what needs to be done.
return_to_host:
SWITCH_TO_HOST
iret
+// An interrupt, with some cause external
+// Has ajerked us rudely from the Guest's code
+// Again we must return home to the Host
deliver_to_host:
SWITCH_TO_HOST
- /* Decode IDT and jump to hosts' irq handler. When that does iret, it
- * will return to run_guest_once. This is a feature. */
+ // But now we must go home via that place
+ // Where that interrupt was supposed to go
+ // Had we not been ensconced, running the Guest.
+ // Here we see the cleverness of our stack:
+ // The Host stack is formed like an interrupt
+ // With EIP, CS and EFLAGS layered.
+ // Interrupt handlers end with "iret"
+ // And that will take us home at long long last.
+
+ // But first we must find the handler to call!
+ // The IDT descriptor for the Host
+ // Has two bytes for size, and four for address:
+ // %edx will hold it for us for now.
movl (LGUEST_PAGES_host_idt_desc+2)(%eax), %edx
+ // We now know the table address we need,
+ // And saved the trap's number inside %ebx.
+ // Yet the pointer to the handler is smeared
+ // Across the bits of the table entry.
+ // What oracle can tell us how to extract
+ // From such a convoluted encoding?
+ // I consulted gcc, and it gave
+ // These instructions, which I gladly credit:
leal (%edx,%ebx,8), %eax
movzwl (%eax),%edx
movl 4(%eax), %eax
xorw %ax, %ax
orl %eax, %edx
+ // Now the address of the handler's in %edx
+ // We call it now: its "iret" takes us home.
jmp *%edx
-/* Real hardware interrupts are delivered straight to the host. Others
- cause us to return to run_guest_once so it can decide what to do. Note
- that some of these are overridden by the guest to deliver directly, and
- never enter here (see load_guest_idt_entry). */
+// Every interrupt can come to us here
+// But we must truly tell each apart.
+// They number two hundred and fifty six
+// And each must land in a different spot,
+// Push its number on stack, and join the stream.
+
+// And worse, a mere six of the traps stand apart
+// And push on their stack an addition:
+// An error number, thirty two bits long
+// So we punish the other two fifty
+// And make them push a zero so they match.
+
+// Yet two fifty six entries is long
+// And all will look most the same as the last
+// So we create a macro which can make
+// As many entries as we need to fill.
+
+// Note the change to .data then .text:
+// We plant the address of each entry
+// Into a (data) table for the Host
+// To know where each Guest interrupt should go.
.macro IRQ_STUB N TARGET
.data; .long 1f; .text; 1:
- /* Make an error number for most traps, which don't have one. */
+ // Trap eight, ten through fourteen and seventeen
+ // Supply an error number. Else zero.
.if (\N <> 8) && (\N < 10 || \N > 14) && (\N <> 17)
pushl $0
.endif
ALIGN
.endm
+// This macro creates numerous entries
+// Using GAS macros which out-power C's.
.macro IRQ_STUBS FIRST LAST TARGET
irq=\FIRST
.rept \LAST-\FIRST+1
.endr
.endm
-/* We intercept every interrupt, because we may need to switch back to
- * host. Unfortunately we can't tell them apart except by entry
- * point, so we need 256 entry points.
- */
+// Here's the marker for our pointer table
+// Laid in the data section just before
+// Each macro places the address of code
+// Forming an array: each one points to text
+// Which handles interrupt in its turn.
.data
.global default_idt_entries
default_idt_entries:
.text
- IRQ_STUBS 0 1 return_to_host /* First two traps */
- IRQ_STUB 2 handle_nmi /* NMI */
- IRQ_STUBS 3 31 return_to_host /* Rest of traps */
- IRQ_STUBS 32 127 deliver_to_host /* Real interrupts */
- IRQ_STUB 128 return_to_host /* System call (overridden) */
- IRQ_STUBS 129 255 deliver_to_host /* Other real interrupts */
-
-/* We ignore NMI and return. */
+ // The first two traps go straight back to the Host
+ IRQ_STUBS 0 1 return_to_host
+ // We'll say nothing, yet, about NMI
+ IRQ_STUB 2 handle_nmi
+ // Other traps also return to the Host
+ IRQ_STUBS 3 31 return_to_host
+ // All interrupts go via their handlers
+ IRQ_STUBS 32 127 deliver_to_host
+ // 'Cept system calls coming from userspace
+ // Are to go to the Guest, never the Host.
+ IRQ_STUB 128 return_to_host
+ IRQ_STUBS 129 255 deliver_to_host
+
+// The NMI, what a fabulous beast
+// Which swoops in and stops us no matter that
+// We're suspended between heaven and hell,
+// (Or more likely between the Host and Guest)
+// When in it comes! We are dazed and confused
+// So we do the simplest thing which one can.
+// Though we've pushed the trap number and zero
+// We discard them, return, and hope we live.
handle_nmi:
addl $8, %esp
iret
+// We are done; all that's left is Mastery
+// And "make Mastery" is a journey long
+// Designed to make your fingers itch to code.
+
+// Here ends the text, the file and poem.
ENTRY(end_switcher_text)
void dm_set_device_limits(struct dm_target *ti, struct block_device *bdev)
{
- request_queue_t *q = bdev_get_queue(bdev);
+ struct request_queue *q = bdev_get_queue(bdev);
struct io_restrictions *rs = &ti->limits;
/*
devices = dm_table_get_devices(t);
for (d = devices->next; d != devices; d = d->next) {
struct dm_dev *dd = list_entry(d, struct dm_dev, list);
- request_queue_t *q = bdev_get_queue(dd->bdev);
+ struct request_queue *q = bdev_get_queue(dd->bdev);
r |= bdi_congested(&q->backing_dev_info, bdi_bits);
}
for (d = devices->next; d != devices; d = d->next) {
struct dm_dev *dd = list_entry(d, struct dm_dev, list);
- request_queue_t *q = bdev_get_queue(dd->bdev);
+ struct request_queue *q = bdev_get_queue(dd->bdev);
if (q->unplug_fn)
q->unplug_fn(q);
for (d = devices->next; d != devices; d = d->next) {
struct dm_dev *dd = list_entry(d, struct dm_dev, list);
- request_queue_t *q = bdev_get_queue(dd->bdev);
+ struct request_queue *q = bdev_get_queue(dd->bdev);
int err;
if (!q->issue_flush_fn)
unsigned long flags;
- request_queue_t *queue;
+ struct request_queue *queue;
struct gendisk *disk;
char name[16];
* The request function that just remaps the bio built up by
* dm_merge_bvec.
*/
-static int dm_request(request_queue_t *q, struct bio *bio)
+static int dm_request(struct request_queue *q, struct bio *bio)
{
int r;
int rw = bio_data_dir(bio);
return 0;
}
-static int dm_flush_all(request_queue_t *q, struct gendisk *disk,
+static int dm_flush_all(struct request_queue *q, struct gendisk *disk,
sector_t *error_sector)
{
struct mapped_device *md = q->queuedata;
return ret;
}
-static void dm_unplug_all(request_queue_t *q)
+static void dm_unplug_all(struct request_queue *q)
{
struct mapped_device *md = q->queuedata;
struct dm_table *map = dm_get_table(md);
static int __bind(struct mapped_device *md, struct dm_table *t)
{
- request_queue_t *q = md->queue;
+ struct request_queue *q = md->queue;
sector_t size;
size = dm_table_get_size(t);
conf->nfaults = n+1;
}
-static int make_request(request_queue_t *q, struct bio *bio)
+static int make_request(struct request_queue *q, struct bio *bio)
{
mddev_t *mddev = q->queuedata;
conf_t *conf = (conf_t*)mddev->private;
*
* Return amount of bytes we can take at this offset
*/
-static int linear_mergeable_bvec(request_queue_t *q, struct bio *bio, struct bio_vec *biovec)
+static int linear_mergeable_bvec(struct request_queue *q, struct bio *bio, struct bio_vec *biovec)
{
mddev_t *mddev = q->queuedata;
dev_info_t *dev0;
return maxsectors << 9;
}
-static void linear_unplug(request_queue_t *q)
+static void linear_unplug(struct request_queue *q)
{
mddev_t *mddev = q->queuedata;
linear_conf_t *conf = mddev_to_conf(mddev);
int i;
for (i=0; i < mddev->raid_disks; i++) {
- request_queue_t *r_queue = bdev_get_queue(conf->disks[i].rdev->bdev);
+ struct request_queue *r_queue = bdev_get_queue(conf->disks[i].rdev->bdev);
if (r_queue->unplug_fn)
r_queue->unplug_fn(r_queue);
}
}
-static int linear_issue_flush(request_queue_t *q, struct gendisk *disk,
+static int linear_issue_flush(struct request_queue *q, struct gendisk *disk,
sector_t *error_sector)
{
mddev_t *mddev = q->queuedata;
for (i=0; i < mddev->raid_disks && ret == 0; i++) {
struct block_device *bdev = conf->disks[i].rdev->bdev;
- request_queue_t *r_queue = bdev_get_queue(bdev);
+ struct request_queue *r_queue = bdev_get_queue(bdev);
if (!r_queue->issue_flush_fn)
ret = -EOPNOTSUPP;
int i, ret = 0;
for (i = 0; i < mddev->raid_disks && !ret ; i++) {
- request_queue_t *q = bdev_get_queue(conf->disks[i].rdev->bdev);
+ struct request_queue *q = bdev_get_queue(conf->disks[i].rdev->bdev);
ret |= bdi_congested(&q->backing_dev_info, bits);
}
return ret;
return 0;
}
-static int linear_make_request (request_queue_t *q, struct bio *bio)
+static int linear_make_request (struct request_queue *q, struct bio *bio)
{
const int rw = bio_data_dir(bio);
mddev_t *mddev = q->queuedata;
)
-static int md_fail_request (request_queue_t *q, struct bio *bio)
+static int md_fail_request (struct request_queue *q, struct bio *bio)
{
bio_io_error(bio, bio->bi_size);
return 0;
mdk_rdev_t *rdev = rcu_dereference(conf->multipaths[i].rdev);
if (rdev && !test_bit(Faulty, &rdev->flags)
&& atomic_read(&rdev->nr_pending)) {
- request_queue_t *r_queue = bdev_get_queue(rdev->bdev);
+ struct request_queue *r_queue = bdev_get_queue(rdev->bdev);
atomic_inc(&rdev->nr_pending);
rcu_read_unlock();
rcu_read_unlock();
}
-static void multipath_unplug(request_queue_t *q)
+static void multipath_unplug(struct request_queue *q)
{
unplug_slaves(q->queuedata);
}
-static int multipath_make_request (request_queue_t *q, struct bio * bio)
+static int multipath_make_request (struct request_queue *q, struct bio * bio)
{
mddev_t *mddev = q->queuedata;
multipath_conf_t *conf = mddev_to_conf(mddev);
seq_printf (seq, "]");
}
-static int multipath_issue_flush(request_queue_t *q, struct gendisk *disk,
+static int multipath_issue_flush(struct request_queue *q, struct gendisk *disk,
sector_t *error_sector)
{
mddev_t *mddev = q->queuedata;
mdk_rdev_t *rdev = rcu_dereference(conf->multipaths[i].rdev);
if (rdev && !test_bit(Faulty, &rdev->flags)) {
struct block_device *bdev = rdev->bdev;
- request_queue_t *r_queue = bdev_get_queue(bdev);
+ struct request_queue *r_queue = bdev_get_queue(bdev);
if (!r_queue->issue_flush_fn)
ret = -EOPNOTSUPP;
for (i = 0; i < mddev->raid_disks ; i++) {
mdk_rdev_t *rdev = rcu_dereference(conf->multipaths[i].rdev);
if (rdev && !test_bit(Faulty, &rdev->flags)) {
- request_queue_t *q = bdev_get_queue(rdev->bdev);
+ struct request_queue *q = bdev_get_queue(rdev->bdev);
ret |= bdi_congested(&q->backing_dev_info, bits);
/* Just like multipath_map, we just check the
#define MD_DRIVER
#define MD_PERSONALITY
-static void raid0_unplug(request_queue_t *q)
+static void raid0_unplug(struct request_queue *q)
{
mddev_t *mddev = q->queuedata;
raid0_conf_t *conf = mddev_to_conf(mddev);
int i;
for (i=0; i<mddev->raid_disks; i++) {
- request_queue_t *r_queue = bdev_get_queue(devlist[i]->bdev);
+ struct request_queue *r_queue = bdev_get_queue(devlist[i]->bdev);
if (r_queue->unplug_fn)
r_queue->unplug_fn(r_queue);
}
}
-static int raid0_issue_flush(request_queue_t *q, struct gendisk *disk,
+static int raid0_issue_flush(struct request_queue *q, struct gendisk *disk,
sector_t *error_sector)
{
mddev_t *mddev = q->queuedata;
for (i=0; i<mddev->raid_disks && ret == 0; i++) {
struct block_device *bdev = devlist[i]->bdev;
- request_queue_t *r_queue = bdev_get_queue(bdev);
+ struct request_queue *r_queue = bdev_get_queue(bdev);
if (!r_queue->issue_flush_fn)
ret = -EOPNOTSUPP;
int i, ret = 0;
for (i = 0; i < mddev->raid_disks && !ret ; i++) {
- request_queue_t *q = bdev_get_queue(devlist[i]->bdev);
+ struct request_queue *q = bdev_get_queue(devlist[i]->bdev);
ret |= bdi_congested(&q->backing_dev_info, bits);
}
*
* Return amount of bytes we can accept at this offset
*/
-static int raid0_mergeable_bvec(request_queue_t *q, struct bio *bio, struct bio_vec *biovec)
+static int raid0_mergeable_bvec(struct request_queue *q, struct bio *bio, struct bio_vec *biovec)
{
mddev_t *mddev = q->queuedata;
sector_t sector = bio->bi_sector + get_start_sect(bio->bi_bdev);
return 0;
}
-static int raid0_make_request (request_queue_t *q, struct bio *bio)
+static int raid0_make_request (struct request_queue *q, struct bio *bio)
{
mddev_t *mddev = q->queuedata;
unsigned int sect_in_chunk, chunksize_bits, chunk_size, chunk_sects;
for (i=0; i<mddev->raid_disks; i++) {
mdk_rdev_t *rdev = rcu_dereference(conf->mirrors[i].rdev);
if (rdev && !test_bit(Faulty, &rdev->flags) && atomic_read(&rdev->nr_pending)) {
- request_queue_t *r_queue = bdev_get_queue(rdev->bdev);
+ struct request_queue *r_queue = bdev_get_queue(rdev->bdev);
atomic_inc(&rdev->nr_pending);
rcu_read_unlock();
rcu_read_unlock();
}
-static void raid1_unplug(request_queue_t *q)
+static void raid1_unplug(struct request_queue *q)
{
mddev_t *mddev = q->queuedata;
md_wakeup_thread(mddev->thread);
}
-static int raid1_issue_flush(request_queue_t *q, struct gendisk *disk,
+static int raid1_issue_flush(struct request_queue *q, struct gendisk *disk,
sector_t *error_sector)
{
mddev_t *mddev = q->queuedata;
mdk_rdev_t *rdev = rcu_dereference(conf->mirrors[i].rdev);
if (rdev && !test_bit(Faulty, &rdev->flags)) {
struct block_device *bdev = rdev->bdev;
- request_queue_t *r_queue = bdev_get_queue(bdev);
+ struct request_queue *r_queue = bdev_get_queue(bdev);
if (!r_queue->issue_flush_fn)
ret = -EOPNOTSUPP;
for (i = 0; i < mddev->raid_disks; i++) {
mdk_rdev_t *rdev = rcu_dereference(conf->mirrors[i].rdev);
if (rdev && !test_bit(Faulty, &rdev->flags)) {
- request_queue_t *q = bdev_get_queue(rdev->bdev);
+ struct request_queue *q = bdev_get_queue(rdev->bdev);
/* Note the '|| 1' - when read_balance prefers
* non-congested targets, it can be removed
return NULL;
}
-static int make_request(request_queue_t *q, struct bio * bio)
+static int make_request(struct request_queue *q, struct bio * bio)
{
mddev_t *mddev = q->queuedata;
conf_t *conf = mddev_to_conf(mddev);
* If near_copies == raid_disk, there are no striping issues,
* but in that case, the function isn't called at all.
*/
-static int raid10_mergeable_bvec(request_queue_t *q, struct bio *bio,
+static int raid10_mergeable_bvec(struct request_queue *q, struct bio *bio,
struct bio_vec *bio_vec)
{
mddev_t *mddev = q->queuedata;
for (i=0; i<mddev->raid_disks; i++) {
mdk_rdev_t *rdev = rcu_dereference(conf->mirrors[i].rdev);
if (rdev && !test_bit(Faulty, &rdev->flags) && atomic_read(&rdev->nr_pending)) {
- request_queue_t *r_queue = bdev_get_queue(rdev->bdev);
+ struct request_queue *r_queue = bdev_get_queue(rdev->bdev);
atomic_inc(&rdev->nr_pending);
rcu_read_unlock();
rcu_read_unlock();
}
-static void raid10_unplug(request_queue_t *q)
+static void raid10_unplug(struct request_queue *q)
{
mddev_t *mddev = q->queuedata;
md_wakeup_thread(mddev->thread);
}
-static int raid10_issue_flush(request_queue_t *q, struct gendisk *disk,
+static int raid10_issue_flush(struct request_queue *q, struct gendisk *disk,
sector_t *error_sector)
{
mddev_t *mddev = q->queuedata;
mdk_rdev_t *rdev = rcu_dereference(conf->mirrors[i].rdev);
if (rdev && !test_bit(Faulty, &rdev->flags)) {
struct block_device *bdev = rdev->bdev;
- request_queue_t *r_queue = bdev_get_queue(bdev);
+ struct request_queue *r_queue = bdev_get_queue(bdev);
if (!r_queue->issue_flush_fn)
ret = -EOPNOTSUPP;
for (i = 0; i < mddev->raid_disks && ret == 0; i++) {
mdk_rdev_t *rdev = rcu_dereference(conf->mirrors[i].rdev);
if (rdev && !test_bit(Faulty, &rdev->flags)) {
- request_queue_t *q = bdev_get_queue(rdev->bdev);
+ struct request_queue *q = bdev_get_queue(rdev->bdev);
ret |= bdi_congested(&q->backing_dev_info, bits);
}
spin_unlock_irq(&conf->resync_lock);
}
-static int make_request(request_queue_t *q, struct bio * bio)
+static int make_request(struct request_queue *q, struct bio * bio)
{
mddev_t *mddev = q->queuedata;
conf_t *conf = mddev_to_conf(mddev);
}
static void unplug_slaves(mddev_t *mddev);
-static void raid5_unplug_device(request_queue_t *q);
+static void raid5_unplug_device(struct request_queue *q);
static struct stripe_head *get_active_stripe(raid5_conf_t *conf, sector_t sector, int disks,
int pd_idx, int noblock)
for (i=0; i<mddev->raid_disks; i++) {
mdk_rdev_t *rdev = rcu_dereference(conf->disks[i].rdev);
if (rdev && !test_bit(Faulty, &rdev->flags) && atomic_read(&rdev->nr_pending)) {
- request_queue_t *r_queue = bdev_get_queue(rdev->bdev);
+ struct request_queue *r_queue = bdev_get_queue(rdev->bdev);
atomic_inc(&rdev->nr_pending);
rcu_read_unlock();
rcu_read_unlock();
}
-static void raid5_unplug_device(request_queue_t *q)
+static void raid5_unplug_device(struct request_queue *q)
{
mddev_t *mddev = q->queuedata;
raid5_conf_t *conf = mddev_to_conf(mddev);
unplug_slaves(mddev);
}
-static int raid5_issue_flush(request_queue_t *q, struct gendisk *disk,
+static int raid5_issue_flush(struct request_queue *q, struct gendisk *disk,
sector_t *error_sector)
{
mddev_t *mddev = q->queuedata;
mdk_rdev_t *rdev = rcu_dereference(conf->disks[i].rdev);
if (rdev && !test_bit(Faulty, &rdev->flags)) {
struct block_device *bdev = rdev->bdev;
- request_queue_t *r_queue = bdev_get_queue(bdev);
+ struct request_queue *r_queue = bdev_get_queue(bdev);
if (!r_queue->issue_flush_fn)
ret = -EOPNOTSUPP;
/* We want read requests to align with chunks where possible,
* but write requests don't need to.
*/
-static int raid5_mergeable_bvec(request_queue_t *q, struct bio *bio, struct bio_vec *biovec)
+static int raid5_mergeable_bvec(struct request_queue *q, struct bio *bio, struct bio_vec *biovec)
{
mddev_t *mddev = q->queuedata;
sector_t sector = bio->bi_sector + get_start_sect(bio->bi_bdev);
static int bio_fits_rdev(struct bio *bi)
{
- request_queue_t *q = bdev_get_queue(bi->bi_bdev);
+ struct request_queue *q = bdev_get_queue(bi->bi_bdev);
if ((bi->bi_size>>9) > q->max_sectors)
return 0;
}
-static int chunk_aligned_read(request_queue_t *q, struct bio * raid_bio)
+static int chunk_aligned_read(struct request_queue *q, struct bio * raid_bio)
{
mddev_t *mddev = q->queuedata;
raid5_conf_t *conf = mddev_to_conf(mddev);
}
-static int make_request(request_queue_t *q, struct bio * bi)
+static int make_request(struct request_queue *q, struct bio * bi)
{
mddev_t *mddev = q->queuedata;
raid5_conf_t *conf = mddev_to_conf(mddev);
config VIDEO_STRADIS
tristate "Stradis 4:2:2 MPEG-2 video driver (EXPERIMENTAL)"
- depends on EXPERIMENTAL && PCI && VIDEO_V4L1 && !PPC64
+ depends on EXPERIMENTAL && PCI && VIDEO_V4L1 && VIRT_TO_BUS
help
Say Y here to enable support for the Stradis 4:2:2 MPEG-2 video
driver for PCI. There is a product page at
config VIDEO_ZORAN
tristate "Zoran ZR36057/36067 Video For Linux"
- depends on PCI && I2C_ALGOBIT && VIDEO_V4L1 && !PPC64
+ depends on PCI && I2C_ALGOBIT && VIDEO_V4L1 && VIRT_TO_BUS
help
Say Y for support for MJPEG capture cards based on the Zoran
36057/36067 PCI controller chipset. This includes the Iomega
* Returns 0 on success or negative error code on failure.
*/
-static int i2o_block_issue_flush(request_queue_t * queue, struct gendisk *disk,
+static int i2o_block_issue_flush(struct request_queue * queue, struct gendisk *disk,
sector_t * error_sector)
{
struct i2o_block_device *i2o_blk_dev = queue->queuedata;
{
struct i2o_block_request *ireq = req->special;
struct i2o_block_device *dev = ireq->i2o_blk_dev;
- request_queue_t *q = req->q;
+ struct request_queue *q = req->q;
unsigned long flags;
if (end_that_request_chunk(req, uptodate, nr_bytes)) {
#define ASUS_HOTK_NAME "Asus Laptop Support"
#define ASUS_HOTK_CLASS "hotkey"
#define ASUS_HOTK_DEVICE_NAME "Hotkey"
-#define ASUS_HOTK_HID "ATK0100"
#define ASUS_HOTK_FILE "asus-laptop"
#define ASUS_HOTK_PREFIX "\\_SB.ATKD."
/*
* The hotkey driver declaration
*/
+static const struct acpi_device_id asus_device_ids[] = {
+ {"ATK0100", 0},
+ {"", 0},
+};
+MODULE_DEVICE_TABLE(acpi, asus_device_ids);
+
static int asus_hotk_add(struct acpi_device *device);
static int asus_hotk_remove(struct acpi_device *device, int type);
static struct acpi_driver asus_hotk_driver = {
.name = ASUS_HOTK_NAME,
.class = ASUS_HOTK_CLASS,
- .ids = ASUS_HOTK_HID,
+ .ids = asus_device_ids,
.ops = {
.add = asus_hotk_add,
.remove = asus_hotk_remove,
}
#define ASUS_LED_UNREGISTER(object) \
- if(object##_led.class_dev \
- && !IS_ERR(object##_led.class_dev)) \
- led_classdev_unregister(&object##_led)
+ led_classdev_unregister(&object##_led)
static void asus_led_exit(void)
{
+ destroy_workqueue(led_workqueue);
ASUS_LED_UNREGISTER(mled);
ASUS_LED_UNREGISTER(tled);
ASUS_LED_UNREGISTER(pled);
ASUS_LED_UNREGISTER(rled);
ASUS_LED_UNREGISTER(gled);
-
- destroy_workqueue(led_workqueue);
}
static void __exit asus_laptop_exit(void)
rv = ASUS_LED_REGISTER(mled, dev);
if (rv)
- return rv;
+ goto out;
rv = ASUS_LED_REGISTER(tled, dev);
if (rv)
- return rv;
+ goto out1;
rv = ASUS_LED_REGISTER(rled, dev);
if (rv)
- return rv;
+ goto out2;
rv = ASUS_LED_REGISTER(pled, dev);
if (rv)
- return rv;
+ goto out3;
rv = ASUS_LED_REGISTER(gled, dev);
if (rv)
- return rv;
+ goto out4;
led_workqueue = create_singlethread_workqueue("led_workqueue");
if (!led_workqueue)
- return -ENOMEM;
+ goto out5;
return 0;
+out5:
+ rv = -ENOMEM;
+ ASUS_LED_UNREGISTER(gled);
+out4:
+ ASUS_LED_UNREGISTER(pled);
+out3:
+ ASUS_LED_UNREGISTER(rled);
+out2:
+ ASUS_LED_UNREGISTER(tled);
+out1:
+ ASUS_LED_UNREGISTER(mled);
+out:
+ return rv;
}
static int __init asus_laptop_init(void)
return 0;
}
+static const struct acpi_device_id sony_device_ids[] = {
+ {SONY_NC_HID, 0},
+ {SONY_PIC_HID, 0},
+ {"", 0},
+};
+MODULE_DEVICE_TABLE(acpi, sony_device_ids);
+
+static const struct acpi_device_id sony_nc_device_ids[] = {
+ {SONY_NC_HID, 0},
+ {"", 0},
+};
+
static struct acpi_driver sony_nc_driver = {
.name = SONY_NC_DRIVER_NAME,
.class = SONY_NC_CLASS,
- .ids = SONY_NC_HID,
+ .ids = sony_nc_device_ids,
.owner = THIS_MODULE,
.ops = {
.add = sony_nc_add,
return 0;
}
+static const struct acpi_device_id sony_pic_device_ids[] = {
+ {SONY_PIC_HID, 0},
+ {"", 0},
+};
+
static struct acpi_driver sony_pic_driver = {
.name = SONY_PIC_DRIVER_NAME,
.class = SONY_PIC_CLASS,
- .ids = SONY_PIC_HID,
+ .ids = sony_pic_device_ids,
.owner = THIS_MODULE,
.ops = {
.add = sony_pic_add,
sprintf(ibm->acpi->driver->name, "%s_%s", IBM_NAME, ibm->name);
ibm->acpi->driver->ids = ibm->acpi->hid;
+
ibm->acpi->driver->ops.add = &tpacpi_device_add;
rc = acpi_bus_register_driver(ibm->acpi->driver);
if (rc < 0) {
printk(IBM_ERR "acpi_bus_register_driver(%s) failed: %d\n",
- ibm->acpi->hid, rc);
+ ibm->name, rc);
kfree(ibm->acpi->driver);
ibm->acpi->driver = NULL;
} else if (!rc)
return res;
}
+static const struct acpi_device_id ibm_htk_device_ids[] = {
+ {IBM_HKEY_HID, 0},
+ {"", 0},
+};
+
static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = {
- .hid = IBM_HKEY_HID,
+ .hid = ibm_htk_device_ids,
.notify = hotkey_notify,
.handle = &hkey_handle,
.type = ACPI_DEVICE_NOTIFY,
/* don't list other alternatives as we install a notify handler on the 570 */
IBM_HANDLE(pci, root, "\\_SB.PCI"); /* 570 */
+static const struct acpi_device_id ibm_pci_device_ids[] = {
+ {PCI_ROOT_HID_STRING, 0},
+ {"", 0},
+};
+
static struct tp_acpi_drv_struct ibm_dock_acpidriver[2] = {
{
.notify = dock_notify,
/* THIS ONE MUST NEVER BE USED FOR DRIVER AUTOLOADING.
* We just use it to get notifications of dock hotplug
* in very old thinkpads */
- .hid = PCI_ROOT_HID_STRING,
+ .hid = ibm_pci_device_ids,
.notify = dock_notify,
.handle = &pci_handle,
.type = ACPI_SYSTEM_NOTIFY,
static void dock_notify(struct ibm_struct *ibm, u32 event)
{
int docked = dock_docked();
- int pci = ibm->acpi->hid && strstr(ibm->acpi->hid, PCI_ROOT_HID_STRING);
+ int pci = ibm->acpi->hid && ibm->acpi->device &&
+ acpi_match_device_ids(ibm->acpi->device, ibm_pci_device_ids);
if (event == 1 && !pci) /* 570 */
acpi_bus_generate_event(ibm->acpi->device, event, 1); /* button */
struct ibm_struct;
struct tp_acpi_drv_struct {
- char *hid;
+ const struct acpi_device_id *hid;
struct acpi_driver *driver;
void (*notify) (struct ibm_struct *, u32);
/*
- * linux/drivers/mmc/queue.c
+ * linux/drivers/mmc/card/queue.c
*
* Copyright (C) 2003 Russell King, All Rights Reserved.
* Copyright 2006-2007 Pierre Ossman
* on any queue on this host, and attempt to issue it. This may
* not be the queue we were asked to process.
*/
-static void mmc_request(request_queue_t *q)
+static void mmc_request(struct request_queue *q)
{
struct mmc_queue *mq = q->queuedata;
struct request *req;
void mmc_cleanup_queue(struct mmc_queue *mq)
{
- request_queue_t *q = mq->queue;
+ struct request_queue *q = mq->queue;
unsigned long flags;
/* Mark that we should start throwing out stragglers */
*/
void mmc_queue_suspend(struct mmc_queue *mq)
{
- request_queue_t *q = mq->queue;
+ struct request_queue *q = mq->queue;
unsigned long flags;
if (!(mq->flags & MMC_QUEUE_SUSPENDED)) {
*/
void mmc_queue_resume(struct mmc_queue *mq)
{
- request_queue_t *q = mq->queue;
+ struct request_queue *q = mq->queue;
unsigned long flags;
if (mq->flags & MMC_QUEUE_SUSPENDED) {
int mmc_add_card(struct mmc_card *card)
{
int ret;
+ const char *type;
snprintf(card->dev.bus_id, sizeof(card->dev.bus_id),
"%s:%04x", mmc_hostname(card->host), card->rca);
+ switch (card->type) {
+ case MMC_TYPE_MMC:
+ type = "MMC";
+ break;
+ case MMC_TYPE_SD:
+ type = "SD";
+ if (mmc_card_blockaddr(card))
+ type = "SDHC";
+ break;
+ default:
+ type = "?";
+ break;
+ }
+
+ printk(KERN_INFO "%s: new %s%s card at address %04x\n",
+ mmc_hostname(card->host),
+ mmc_card_highspeed(card) ? "high speed " : "",
+ type, card->rca);
+
card->dev.uevent_suppress = 1;
ret = device_add(&card->dev);
void mmc_remove_card(struct mmc_card *card)
{
if (mmc_card_present(card)) {
+ printk(KERN_INFO "%s: card %04x removed\n",
+ mmc_hostname(card->host), card->rca);
+
if (card->host->bus_ops->sysfs_remove)
card->host->bus_ops->sysfs_remove(card->host, card);
device_del(&card->dev);
struct mmc_command *cmd = mrq->cmd;
int err = cmd->error;
- pr_debug("%s: req done (CMD%u): %d/%d/%d: %08x %08x %08x %08x\n",
- mmc_hostname(host), cmd->opcode, err,
- mrq->data ? mrq->data->error : 0,
- mrq->stop ? mrq->stop->error : 0,
- cmd->resp[0], cmd->resp[1], cmd->resp[2], cmd->resp[3]);
-
if (err && cmd->retries) {
+ pr_debug("%s: req failed (CMD%u): %d, retrying...\n",
+ mmc_hostname(host), cmd->opcode, err);
+
cmd->retries--;
cmd->error = 0;
host->ops->request(host, mrq);
- } else if (mrq->done) {
- mrq->done(mrq);
+ } else {
+ pr_debug("%s: req done (CMD%u): %d: %08x %08x %08x %08x\n",
+ mmc_hostname(host), cmd->opcode, err,
+ cmd->resp[0], cmd->resp[1],
+ cmd->resp[2], cmd->resp[3]);
+
+ if (mrq->data) {
+ pr_debug("%s: %d bytes transferred: %d\n",
+ mmc_hostname(host),
+ mrq->data->bytes_xfered, mrq->data->error);
+ }
+
+ if (mrq->stop) {
+ pr_debug("%s: (CMD%u): %d: %08x %08x %08x %08x\n",
+ mmc_hostname(host), mrq->stop->opcode,
+ mrq->stop->error,
+ mrq->stop->resp[0], mrq->stop->resp[1],
+ mrq->stop->resp[2], mrq->stop->resp[3]);
+ }
+
+ if (mrq->done)
+ mrq->done(mrq);
}
}
EXPORT_SYMBOL(mmc_request_done);
-/**
- * mmc_start_request - start a command on a host
- * @host: MMC host to start command on
- * @mrq: MMC request to start
- *
- * Queue a command on the specified host. We expect the
- * caller to be holding the host lock with interrupts disabled.
- */
-void
+static void
mmc_start_request(struct mmc_host *host, struct mmc_request *mrq)
{
#ifdef CONFIG_MMC_DEBUG
mmc_hostname(host), mrq->cmd->opcode,
mrq->cmd->arg, mrq->cmd->flags);
+ if (mrq->data) {
+ pr_debug("%s: blksz %d blocks %d flags %08x "
+ "tsac %d ms nsac %d\n",
+ mmc_hostname(host), mrq->data->blksz,
+ mrq->data->blocks, mrq->data->flags,
+ mrq->data->timeout_ns / 10000000,
+ mrq->data->timeout_clks);
+ }
+
+ if (mrq->stop) {
+ pr_debug("%s: CMD%u arg %08x flags %08x\n",
+ mmc_hostname(host), mrq->stop->opcode,
+ mrq->stop->arg, mrq->stop->flags);
+ }
+
WARN_ON(!host->claimed);
mrq->cmd->error = 0;
host->ops->request(host, mrq);
}
-EXPORT_SYMBOL(mmc_start_request);
-
static void mmc_wait_done(struct mmc_request *mrq)
{
complete(mrq->done_data);
}
-int mmc_wait_for_req(struct mmc_host *host, struct mmc_request *mrq)
+/**
+ * mmc_wait_for_req - start a request and wait for completion
+ * @host: MMC host to start command
+ * @mrq: MMC request to start
+ *
+ * Start a new MMC custom command request for a host, and wait
+ * for the command to complete. Does not attempt to parse the
+ * response.
+ */
+void mmc_wait_for_req(struct mmc_host *host, struct mmc_request *mrq)
{
DECLARE_COMPLETION_ONSTACK(complete);
mmc_start_request(host, mrq);
wait_for_completion(&complete);
-
- return 0;
}
EXPORT_SYMBOL(mmc_wait_for_req);
* @data: data phase for command
* @card: the MMC card associated with the data transfer
* @write: flag to differentiate reads from writes
+ *
+ * Computes the data timeout parameters according to the
+ * correct algorithm given the card type.
*/
void mmc_set_data_timeout(struct mmc_data *data, const struct mmc_card *card,
int write)
EXPORT_SYMBOL(mmc_set_data_timeout);
/**
- * __mmc_claim_host - exclusively claim a host
+ * mmc_claim_host - exclusively claim a host
* @host: mmc host to claim
- * @card: mmc card to claim host for
- *
- * Claim a host for a set of operations. If a valid card
- * is passed and this wasn't the last card selected, select
- * the card before returning.
*
- * Note: you should use mmc_card_claim_host or mmc_claim_host.
+ * Claim a host for a set of operations.
*/
void mmc_claim_host(struct mmc_host *host)
{
DECLARE_WAITQUEUE(wait, current);
unsigned long flags;
+ might_sleep();
+
add_wait_queue(&host->wq, &wait);
spin_lock_irqsave(&host->lock, flags);
while (1) {
mmc_set_ios(host);
}
+/*
+ * Cleanup when the last reference to the bus operator is dropped.
+ */
+void __mmc_release_bus(struct mmc_host *host)
+{
+ BUG_ON(!host);
+ BUG_ON(host->bus_refs);
+ BUG_ON(!host->bus_dead);
+
+ host->bus_ops = NULL;
+}
+
+/*
+ * Increase reference count of bus operator
+ */
+static inline void mmc_bus_get(struct mmc_host *host)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&host->lock, flags);
+ host->bus_refs++;
+ spin_unlock_irqrestore(&host->lock, flags);
+}
+
+/*
+ * Decrease reference count of bus operator and free it if
+ * it is the last reference.
+ */
+static inline void mmc_bus_put(struct mmc_host *host)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&host->lock, flags);
+ host->bus_refs--;
+ if ((host->bus_refs == 0) && host->bus_ops)
+ __mmc_release_bus(host);
+ spin_unlock_irqrestore(&host->lock, flags);
+}
+
/*
* Assign a mmc bus handler to a host. Only one bus handler may control a
* host at any given time.
mmc_bus_put(host);
}
-/*
- * Cleanup when the last reference to the bus operator is dropped.
- */
-void __mmc_release_bus(struct mmc_host *host)
-{
- BUG_ON(!host);
- BUG_ON(host->bus_refs);
- BUG_ON(!host->bus_dead);
-
- host->bus_ops = NULL;
-}
-
/**
* mmc_detect_change - process change of state on a MMC socket
* @host: host which changed state.
* @delay: optional delay to wait before detection (jiffies)
*
- * All we know is that card(s) have been inserted or removed
- * from the socket(s). We don't know which socket or cards.
+ * MMC drivers should call this when they detect a card has been
+ * inserted or removed. The MMC layer will confirm that any
+ * present card is still functional, and initialize any newly
+ * inserted.
*/
void mmc_detect_change(struct mmc_host *host, unsigned long delay)
{
void mmc_attach_bus(struct mmc_host *host, const struct mmc_bus_ops *ops);
void mmc_detach_bus(struct mmc_host *host);
-void __mmc_release_bus(struct mmc_host *host);
-
-static inline void mmc_bus_get(struct mmc_host *host)
-{
- unsigned long flags;
-
- spin_lock_irqsave(&host->lock, flags);
- host->bus_refs++;
- spin_unlock_irqrestore(&host->lock, flags);
-}
-
-static inline void mmc_bus_put(struct mmc_host *host)
-{
- unsigned long flags;
-
- spin_lock_irqsave(&host->lock, flags);
- host->bus_refs--;
- if ((host->bus_refs == 0) && host->bus_ops)
- __mmc_release_bus(host);
- spin_unlock_irqrestore(&host->lock, flags);
-}
-
void mmc_set_chip_select(struct mmc_host *host, int mode);
void mmc_set_clock(struct mmc_host *host, unsigned int hz);
void mmc_set_bus_mode(struct mmc_host *host, unsigned int mode);
/**
* mmc_add_host - initialise host hardware
* @host: mmc host
+ *
+ * Register the host with the driver model. The host must be
+ * prepared to start servicing requests before this function
+ * completes.
*/
int mmc_add_host(struct mmc_host *host)
{
* @host: mmc host
*
* Unregister and remove all cards associated with this host,
- * and power down the MMC bus.
+ * and power down the MMC bus. No new requests will be issued
+ * after this function has returned.
*/
void mmc_remove_host(struct mmc_host *host)
{
/*
- * linux/drivers/mmc/mmc.c
+ * linux/drivers/mmc/core/mmc.c
*
* Copyright (C) 2003-2004 Russell King, All Rights Reserved.
* Copyright (C) 2005-2007 Pierre Ossman, All Rights Reserved.
break;
default:
- printk("%s: card has unknown MMCA version %d\n",
+ printk(KERN_ERR "%s: card has unknown MMCA version %d\n",
mmc_hostname(card->host), card->csd.mmca_vsn);
return -EINVAL;
}
*/
csd_struct = UNSTUFF_BITS(resp, 126, 2);
if (csd_struct != 1 && csd_struct != 2) {
- printk("%s: unrecognised CSD structure version %d\n",
+ printk(KERN_ERR "%s: unrecognised CSD structure version %d\n",
mmc_hostname(card->host), csd_struct);
return -EINVAL;
}
BUG_ON(!host->card);
mmc_claim_host(host);
-
err = mmc_init_card(host, host->ocr, host->card);
+ mmc_release_host(host);
+
if (err != MMC_ERR_NONE) {
mmc_remove(host);
+
+ mmc_claim_host(host);
mmc_detach_bus(host);
+ mmc_release_host(host);
}
- mmc_release_host(host);
}
#else
/*
* Can we support the voltage of the card?
*/
- if (!host->ocr)
+ if (!host->ocr) {
+ err = -EINVAL;
goto err;
+ }
/*
* Detect and init the card.
err = mmc_add_card(host->card);
if (err)
- goto reclaim_host;
+ goto remove_card;
return 0;
-reclaim_host:
- mmc_claim_host(host);
+remove_card:
mmc_remove_card(host->card);
host->card = NULL;
+ mmc_claim_host(host);
err:
mmc_detach_bus(host);
mmc_release_host(host);
+ printk(KERN_ERR "%s: error %d whilst initialising MMC card\n",
+ mmc_hostname(host), err);
+
return 0;
}
/*
- * linux/drivers/mmc/mmc_ops.h
+ * linux/drivers/mmc/core/mmc_ops.h
*
* Copyright 2006-2007 Pierre Ossman
*
/*
- * linux/drivers/mmc/mmc_ops.h
+ * linux/drivers/mmc/core/mmc_ops.h
*
* Copyright 2006-2007 Pierre Ossman
*
/*
- * linux/drivers/mmc/sd.c
+ * linux/drivers/mmc/core/sd.c
*
* Copyright (C) 2003-2004 Russell King, All Rights Reserved.
* SD support Copyright (C) 2004 Ian Molton, All Rights Reserved.
csd->write_partial = 0;
break;
default:
- printk("%s: unrecognised CSD structure version %d\n",
+ printk(KERN_ERR "%s: unrecognised CSD structure version %d\n",
mmc_hostname(card->host), csd_struct);
return -EINVAL;
}
scr_struct = UNSTUFF_BITS(resp, 60, 4);
if (scr_struct != 0) {
- printk("%s: unrecognised SCR structure version %d\n",
+ printk(KERN_ERR "%s: unrecognised SCR structure version %d\n",
mmc_hostname(card->host), scr_struct);
return -EINVAL;
}
status = kmalloc(64, GFP_KERNEL);
if (!status) {
- printk("%s: could not allocate a buffer for switch "
- "capabilities.\n",
- mmc_hostname(card->host));
+ printk(KERN_ERR "%s: could not allocate a buffer for "
+ "switch capabilities.\n", mmc_hostname(card->host));
return err;
}
status = kmalloc(64, GFP_KERNEL);
if (!status) {
- printk("%s: could not allocate a buffer for switch "
- "capabilities.\n",
- mmc_hostname(card->host));
+ printk(KERN_ERR "%s: could not allocate a buffer for "
+ "switch capabilities.\n", mmc_hostname(card->host));
return err;
}
BUG_ON(!host->card);
mmc_claim_host(host);
-
err = mmc_sd_init_card(host, host->ocr, host->card);
+ mmc_release_host(host);
+
if (err != MMC_ERR_NONE) {
mmc_sd_remove(host);
+
+ mmc_claim_host(host);
mmc_detach_bus(host);
+ mmc_release_host(host);
}
- mmc_release_host(host);
}
#else
/*
* Can we support the voltage(s) of the card(s)?
*/
- if (!host->ocr)
+ if (!host->ocr) {
+ err = -EINVAL;
goto err;
+ }
/*
* Detect and init the card.
err = mmc_add_card(host->card);
if (err)
- goto reclaim_host;
+ goto remove_card;
return 0;
-reclaim_host:
- mmc_claim_host(host);
+remove_card:
mmc_remove_card(host->card);
host->card = NULL;
+ mmc_claim_host(host);
err:
mmc_detach_bus(host);
mmc_release_host(host);
+ printk(KERN_ERR "%s: error %d whilst initialising SD card\n",
+ mmc_hostname(host), err);
+
return 0;
}
/*
- * linux/drivers/mmc/sd_ops.h
+ * linux/drivers/mmc/core/sd_ops.h
*
* Copyright 2006-2007 Pierre Ossman
*
#include "core.h"
#include "sd_ops.h"
+static int mmc_app_cmd(struct mmc_host *host, struct mmc_card *card)
+{
+ int err;
+ struct mmc_command cmd;
+
+ BUG_ON(!host);
+ BUG_ON(card && (card->host != host));
+
+ cmd.opcode = MMC_APP_CMD;
+
+ if (card) {
+ cmd.arg = card->rca << 16;
+ cmd.flags = MMC_RSP_R1 | MMC_CMD_AC;
+ } else {
+ cmd.arg = 0;
+ cmd.flags = MMC_RSP_R1 | MMC_CMD_BCR;
+ }
+
+ err = mmc_wait_for_cmd(host, &cmd, 0);
+ if (err != MMC_ERR_NONE)
+ return err;
+
+ /* Check that card supported application commands */
+ if (!(cmd.resp[0] & R1_APP_CMD))
+ return MMC_ERR_FAILED;
+
+ return MMC_ERR_NONE;
+}
+
/**
* mmc_wait_for_app_cmd - start an application command and wait for
completion
* @host: MMC host to start command
- * @rca: RCA to send MMC_APP_CMD to
+ * @card: Card to send MMC_APP_CMD to
* @cmd: MMC command to start
* @retries: maximum number of retries
*
EXPORT_SYMBOL(mmc_wait_for_app_cmd);
-int mmc_app_cmd(struct mmc_host *host, struct mmc_card *card)
-{
- int err;
- struct mmc_command cmd;
-
- BUG_ON(!host);
- BUG_ON(card && (card->host != host));
-
- cmd.opcode = MMC_APP_CMD;
-
- if (card) {
- cmd.arg = card->rca << 16;
- cmd.flags = MMC_RSP_R1 | MMC_CMD_AC;
- } else {
- cmd.arg = 0;
- cmd.flags = MMC_RSP_R1 | MMC_CMD_BCR;
- }
-
- err = mmc_wait_for_cmd(host, &cmd, 0);
- if (err != MMC_ERR_NONE)
- return err;
-
- /* Check that card supported application commands */
- if (!(cmd.resp[0] & R1_APP_CMD))
- return MMC_ERR_FAILED;
-
- return MMC_ERR_NONE;
-}
-
int mmc_app_set_bus_width(struct mmc_card *card, int width)
{
int err;
/*
- * linux/drivers/mmc/sd_ops.h
+ * linux/drivers/mmc/core/sd_ops.h
*
* Copyright 2006-2007 Pierre Ossman
*
#ifndef _MMC_SD_OPS_H
#define _MMC_SD_OPS_H
-int mmc_app_cmd(struct mmc_host *host, struct mmc_card *card);
int mmc_app_set_bus_width(struct mmc_card *card, int width);
int mmc_send_app_op_cond(struct mmc_host *host, u32 ocr, u32 *rocr);
int mmc_send_if_cond(struct mmc_host *host, u32 ocr);
/*
- * linux/drivers/mmc/at91_mci.c - ATMEL AT91 MCI Driver
+ * linux/drivers/mmc/host/at91_mci.c - ATMEL AT91 MCI Driver
*
* Copyright (C) 2005 Cougar Creek Computing Devices Ltd, All Rights Reserved
*
/*
- * linux/drivers/mmc/au1xmmc.c - AU1XX0 MMC driver
+ * linux/drivers/mmc/host/au1xmmc.c - AU1XX0 MMC driver
*
* Copyright (c) 2005, Advanced Micro Devices, Inc.
*
/*
- * linux/drivers/mmc/imxmmc.c - Motorola i.MX MMCI driver
+ * linux/drivers/mmc/host/imxmmc.c - Motorola i.MX MMCI driver
*
* Copyright (C) 2004 Sascha Hauer, Pengutronix <sascha@saschahauer.de>
* Copyright (C) 2006 Pavel Pisa, PiKRON <ppisa@pikron.com>
/*
- * linux/drivers/mmc/mmci.c - ARM PrimeCell MMCI PL180/1 driver
+ * linux/drivers/mmc/host/mmci.c - ARM PrimeCell MMCI PL180/1 driver
*
* Copyright (C) 2003 Deep Blue Solutions, Ltd, All Rights Reserved.
*
/*
- * linux/drivers/mmc/mmci.h - ARM PrimeCell MMCI PL180/1 driver
+ * linux/drivers/mmc/host/mmci.h - ARM PrimeCell MMCI PL180/1 driver
*
* Copyright (C) 2003 Deep Blue Solutions, Ltd, All Rights Reserved.
*
/*
- * linux/drivers/media/mmc/omap.c
+ * linux/drivers/mmc/host/omap.c
*
* Copyright (C) 2004 Nokia Corporation
* Written by Tuukka Tikkanen and Juha Yrjölä<juha.yrjola@nokia.com>
/*
- * linux/drivers/mmc/pxa.c - PXA MMCI driver
+ * linux/drivers/mmc/host/pxa.c - PXA MMCI driver
*
* Copyright (C) 2003 Russell King, All Rights Reserved.
*
/*
- * linux/drivers/mmc/sdhci.c - Secure Digital Host Controller Interface driver
+ * linux/drivers/mmc/host/sdhci.c - Secure Digital Host Controller Interface driver
*
* Copyright (C) 2005-2007 Pierre Ossman, All Rights Reserved.
*
/* Controller doesn't like some resets when there is no card inserted. */
#define SDHCI_QUIRK_NO_CARD_NO_RESET (1<<2)
#define SDHCI_QUIRK_SINGLE_POWER_WRITE (1<<3)
+#define SDHCI_QUIRK_RESET_CMD_DATA_ON_IOS (1<<4)
static const struct pci_device_id pci_ids[] __devinitdata = {
{
.driver_data = SDHCI_QUIRK_SINGLE_POWER_WRITE,
},
+ {
+ .vendor = PCI_VENDOR_ID_ENE,
+ .device = PCI_DEVICE_ID_ENE_CB714_SD,
+ .subvendor = PCI_ANY_ID,
+ .subdevice = PCI_ANY_ID,
+ .driver_data = SDHCI_QUIRK_SINGLE_POWER_WRITE |
+ SDHCI_QUIRK_RESET_CMD_DATA_ON_IOS,
+ },
+
+ {
+ .vendor = PCI_VENDOR_ID_ENE,
+ .device = PCI_DEVICE_ID_ENE_CB714_SD_2,
+ .subvendor = PCI_ANY_ID,
+ .subdevice = PCI_ANY_ID,
+ .driver_data = SDHCI_QUIRK_SINGLE_POWER_WRITE |
+ SDHCI_QUIRK_RESET_CMD_DATA_ON_IOS,
+ },
+
{ /* Generic SD host controller */
PCI_DEVICE_CLASS((PCI_CLASS_SYSTEM_SDHCI << 8), 0xFFFF00)
},
if (data == NULL)
return;
- DBG("blksz %04x blks %04x flags %08x\n",
- data->blksz, data->blocks, data->flags);
- DBG("tsac %d ms nsac %d clk\n",
- data->timeout_ns / 1000000, data->timeout_clks);
-
/* Sanity checks */
BUG_ON(data->blksz * data->blocks > 524288);
BUG_ON(data->blksz > host->mmc->max_blk_size);
data->error = MMC_ERR_FAILED;
}
- DBG("Ending data transfer (%d bytes)\n", data->bytes_xfered);
-
if (data->stop) {
/*
* The controller needs a reset of internal state machines
WARN_ON(host->cmd);
- DBG("Sending cmd (%x)\n", cmd->opcode);
-
/* Wait max 10 ms */
timeout = 10;
host->cmd->error = MMC_ERR_NONE;
- DBG("Ending cmd (%x)\n", host->cmd->opcode);
-
if (host->cmd->data)
host->data = host->cmd->data;
else
writeb(ctrl, host->ioaddr + SDHCI_HOST_CONTROL);
+ /*
+ * Some (ENE) controllers go apeshit on some ios operation,
+ * signalling timeout and CRC errors even on CMD0. Resetting
+ * it on each ios seems to solve the problem.
+ */
+ if(host->chip->quirks & SDHCI_QUIRK_RESET_CMD_DATA_ON_IOS)
+ sdhci_reset(host, SDHCI_RESET_CMD | SDHCI_RESET_DATA);
+
mmiowb();
spin_unlock_irqrestore(&host->lock, flags);
}
mrq = host->mrq;
- DBG("Ending request, cmd (%x)\n", mrq->cmd->opcode);
-
/*
* The controller needs a reset of internal state machines
* upon error conditions.
return;
}
- if (intmask & SDHCI_INT_RESPONSE)
- sdhci_finish_command(host);
- else {
- if (intmask & SDHCI_INT_TIMEOUT)
- host->cmd->error = MMC_ERR_TIMEOUT;
- else if (intmask & SDHCI_INT_CRC)
- host->cmd->error = MMC_ERR_BADCRC;
- else if (intmask & (SDHCI_INT_END_BIT | SDHCI_INT_INDEX))
- host->cmd->error = MMC_ERR_FAILED;
- else
- host->cmd->error = MMC_ERR_INVALID;
+ if (intmask & SDHCI_INT_TIMEOUT)
+ host->cmd->error = MMC_ERR_TIMEOUT;
+ else if (intmask & SDHCI_INT_CRC)
+ host->cmd->error = MMC_ERR_BADCRC;
+ else if (intmask & (SDHCI_INT_END_BIT | SDHCI_INT_INDEX))
+ host->cmd->error = MMC_ERR_FAILED;
+ if (host->cmd->error != MMC_ERR_NONE)
tasklet_schedule(&host->finish_tasklet);
- }
+ else if (intmask & SDHCI_INT_RESPONSE)
+ sdhci_finish_command(host);
}
static void sdhci_data_irq(struct sdhci_host *host, u32 intmask)
/*
- * linux/drivers/mmc/sdhci.h - Secure Digital Host Controller Interface driver
+ * linux/drivers/mmc/host/sdhci.h - Secure Digital Host Controller Interface driver
*
* Copyright (C) 2005-2007 Pierre Ossman, All Rights Reserved.
*
/*
- * linux/drivers/mmc/wbsd.c - Winbond W83L51xD SD/MMC driver
+ * linux/drivers/mmc/host/wbsd.c - Winbond W83L51xD SD/MMC driver
*
* Copyright (C) 2004-2007 Pierre Ossman, All Rights Reserved.
*
{
unsigned long dmaflags;
- DBGF("Ending request, cmd (%x)\n", mrq->cmd->opcode);
-
if (host->dma >= 0) {
/*
* Release ISA DMA controller.
int i;
u8 status, isr;
- DBGF("Sending cmd (%x)\n", cmd->opcode);
-
/*
* Clear accumulated ISR. The interrupt routine
* will fill this one with events that occur during
wbsd_get_short_reply(host, cmd);
}
}
-
- DBGF("Sent cmd (%x), res %d\n", cmd->opcode, cmd->error);
}
/*
unsigned long dmaflags;
unsigned int size;
- DBGF("blksz %04x blks %04x flags %08x\n",
- data->blksz, data->blocks, data->flags);
- DBGF("tsac %d ms nsac %d clk\n",
- data->timeout_ns / 1000000, data->timeout_clks);
-
/*
* Calculate size.
*/
}
}
- DBGF("Ending data transfer (%d bytes)\n", data->bytes_xfered);
-
wbsd_request_end(host, host->mrq);
}
/*
- * linux/drivers/mmc/wbsd.h - Winbond W83L51xD SD/MMC driver
+ * linux/drivers/mmc/host/wbsd.h - Winbond W83L51xD SD/MMC driver
*
* Copyright (C) 2004-2007 Pierre Ossman, All Rights Reserved.
*
config MTD_SUN_UFLASH
tristate "Sun Microsystems userflash support"
- depends on SPARC && MTD_CFI
+ depends on SPARC && MTD_CFI && PCI
help
This provides a 'mapping' driver which supports the way in
which user-programmable flash chips are connected on various
#include <asm/io.h>
#include <asm/dma.h>
#include <asm/pgtable.h>
+#include <asm/cacheflush.h>
static char version[] __initdata =
"82596.c $Revision: 1.5 $\n";
gianfar_sysfs.o
obj-$(CONFIG_UCC_GETH) += ucc_geth_driver.o
-ucc_geth_driver-objs := ucc_geth.o ucc_geth_mii.o
+ucc_geth_driver-objs := ucc_geth.o ucc_geth_mii.o ucc_geth_ethtool.o
#
# link order important here
int result = 0;
short i;
- if (!dev) {
- printk(KERN_ERR "No device!\n");
- result = -ENODEV;
- goto out;
- }
-
/*
* Don't take interrupts on this CPU will bit banging
* the %#%#@$ I2C device
#define AUTONEG_ADVERTISE_10_100_ALL 0x000F /* All 10/100 speeds */
#define AUTONEG_ADVERTISE_10_ALL 0x0003 /* 10Mbps Full & Half speeds */
-/* The size (in bytes) of a ethernet packet */
-#define ENET_HEADER_SIZE 14
-#define MAXIMUM_ETHERNET_FRAME_SIZE 1518 /* with FCS */
-#define MINIMUM_ETHERNET_FRAME_SIZE 64 /* with FCS */
-#define ETHERNET_FCS_SIZE 4
#define MAX_JUMBO_FRAME_SIZE 0x2800
#define PHY_AUTO_NEG_TIME 45 /* 4.5 Seconds */
atl1_dma_req_128 = 0,
atl1_dma_req_256 = 1,
atl1_dma_req_512 = 2,
- atl1_dam_req_1024 = 3,
- atl1_dam_req_2048 = 4,
+ atl1_dma_req_1024 = 3,
+ atl1_dma_req_2048 = 4,
atl1_dma_req_4096 = 5
};
#include <linux/skbuff.h>
#include <linux/etherdevice.h>
#include <linux/if_vlan.h>
+#include <linux/if_ether.h>
#include <linux/irqreturn.h>
#include <linux/workqueue.h>
#include <linux/timer.h>
struct atl1_hw *hw = &adapter->hw;
struct net_device *netdev = adapter->netdev;
- hw->max_frame_size = netdev->mtu + ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
- hw->min_frame_size = MINIMUM_ETHERNET_FRAME_SIZE;
+ hw->max_frame_size = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
+ hw->min_frame_size = ETH_ZLEN + ETH_FCS_LEN;
adapter->wol = 0;
adapter->rx_buffer_len = (hw->max_frame_size + 7) & ~7;
return -ENOMEM;
}
-void atl1_init_ring_ptrs(struct atl1_adapter *adapter)
+static void atl1_init_ring_ptrs(struct atl1_adapter *adapter)
{
struct atl1_tpd_ring *tpd_ring = &adapter->tpd_ring;
struct atl1_rfd_ring *rfd_ring = &adapter->rfd_ring;
{
struct atl1_adapter *adapter = netdev_priv(netdev);
int old_mtu = netdev->mtu;
- int max_frame = new_mtu + ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
+ int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
- if ((max_frame < MINIMUM_ETHERNET_FRAME_SIZE) ||
+ if ((max_frame < ETH_ZLEN + ETH_FCS_LEN) ||
(max_frame > MAX_JUMBO_FRAME_SIZE)) {
dev_warn(&adapter->pdev->dev, "invalid MTU setting\n");
return -EINVAL;
/* config DMA Engine */
value = ((((u32) hw->dmar_block) & DMA_CTRL_DMAR_BURST_LEN_MASK)
<< DMA_CTRL_DMAR_BURST_LEN_SHIFT) |
- ((((u32) hw->dmaw_block) & DMA_CTRL_DMAR_BURST_LEN_MASK)
- << DMA_CTRL_DMAR_BURST_LEN_SHIFT) | DMA_CTRL_DMAR_EN |
+ ((((u32) hw->dmaw_block) & DMA_CTRL_DMAW_BURST_LEN_MASK)
+ << DMA_CTRL_DMAW_BURST_LEN_SHIFT) | DMA_CTRL_DMAR_EN |
DMA_CTRL_DMAW_EN;
value |= (u32) hw->dma_ord;
if (atl1_rcb_128 == hw->rcb_value)
iowrite32(value, hw->hw_addr + REG_DMA_CTRL);
/* config CMB / SMB */
- value = hw->cmb_rrd | ((u32) hw->cmb_tpd << 16);
+ value = (hw->cmb_tpd > adapter->tpd_ring.count) ?
+ hw->cmb_tpd : adapter->tpd_ring.count;
+ value <<= 16;
+ value |= hw->cmb_rrd;
iowrite32(value, hw->hw_addr + REG_CMB_WRITE_TH);
value = hw->cmb_rx_timer | ((u32) hw->cmb_tx_timer << 16);
iowrite32(value, hw->hw_addr + REG_CMB_WRITE_TIMER);
skb = buffer_info->skb;
length = le16_to_cpu(rrd->xsz.xsum_sz.pkt_size);
- skb_put(skb, length - ETHERNET_FCS_SIZE);
+ skb_put(skb, length - ETH_FCS_LEN);
/* Receive Checksum Offload */
atl1_rx_checksum(adapter, rrd, skb);
netif_wake_queue(adapter->netdev);
}
-static u16 tpd_avail(struct atl1_tpd_ring *tpd_ring)
+static u16 atl1_tpd_avail(struct atl1_tpd_ring *tpd_ring)
{
u16 next_to_clean = atomic_read(&tpd_ring->next_to_clean);
u16 next_to_use = atomic_read(&tpd_ring->next_to_use);
tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
iph->daddr, 0, IPPROTO_TCP, 0);
ipofst = skb_network_offset(skb);
- if (ipofst != ENET_HEADER_SIZE) /* 802.3 frame */
+ if (ipofst != ETH_HLEN) /* 802.3 frame */
tso->tsopl |= 1 << TSO_PARAM_ETHTYPE_SHIFT;
tso->tsopl |= (iph->ihl &
return NETDEV_TX_LOCKED;
}
- if (tpd_avail(&adapter->tpd_ring) < count) {
+ if (atl1_tpd_avail(&adapter->tpd_ring) < count) {
/* not enough descriptors */
netif_stop_queue(netdev);
spin_unlock_irqrestore(&adapter->lock, flags);
}
ei_status.mem = ioremap(res->start, size);
- dev->base_addr = (long)ei_status.mem;
+ dev->base_addr = (unsigned long)ei_status.mem;
if (ei_status.mem == NULL) {
dev_err(&pdev->dev, "Cannot ioremap area (%08zx,%08zx)\n",
* the buffer.
*/
static struct sk_buff *cxgb3_get_cpl_reply_skb(struct sk_buff *skb, size_t len,
- int gfp)
+ gfp_t gfp)
{
if (likely(!skb_cloned(skb))) {
BUG_ON(skb->len < len);
/* Include files */
#include <linux/bitops.h>
+#include <linux/compiler.h>
#include <linux/delay.h>
#include <linux/dma-mapping.h>
#include <linux/eisa.h>
*/
#define NEW_SKB_SIZE (PI_RCV_DATA_K_SIZE_MAX+128)
-#define __unused __attribute__ ((unused))
-
#ifdef CONFIG_PCI
#define DFX_BUS_PCI(dev) (dev->bus == &pci_bus_type)
#else
static void dfx_port_write_long(DFX_board_t *bp, int offset, u32 data)
{
- struct device __unused *bdev = bp->bus_dev;
+ struct device __maybe_unused *bdev = bp->bus_dev;
int dfx_bus_tc = DFX_BUS_TC(bdev);
int dfx_use_mmio = DFX_MMIO || dfx_bus_tc;
static void dfx_port_read_long(DFX_board_t *bp, int offset, u32 *data)
{
- struct device __unused *bdev = bp->bus_dev;
+ struct device __maybe_unused *bdev = bp->bus_dev;
int dfx_bus_tc = DFX_BUS_TC(bdev);
int dfx_use_mmio = DFX_MMIO || dfx_bus_tc;
static void __devinit dfx_bus_config_check(DFX_board_t *bp)
{
- struct device __unused *bdev = bp->bus_dev;
+ struct device __maybe_unused *bdev = bp->bus_dev;
int dfx_bus_eisa = DFX_BUS_EISA(bdev);
int status; /* return code from adapter port control call */
u32 host_data; /* LW data returned from port control call */
}
-static int __devinit __unused dfx_dev_register(struct device *);
-static int __devexit __unused dfx_dev_unregister(struct device *);
+static int __devinit __maybe_unused dfx_dev_register(struct device *);
+static int __devexit __maybe_unused dfx_dev_unregister(struct device *);
#ifdef CONFIG_PCI
static int __devinit dfx_pci_register(struct pci_dev *,
};
#endif /* CONFIG_TC */
-static int __devinit __unused dfx_dev_register(struct device *dev)
+static int __devinit __maybe_unused dfx_dev_register(struct device *dev)
{
int status;
return status;
}
-static int __devexit __unused dfx_dev_unregister(struct device *dev)
+static int __devexit __maybe_unused dfx_dev_unregister(struct device *dev)
{
put_device(dev);
dfx_unregister(dev);
#include <asm/io.h>
#define DRV_NAME "ehea"
-#define DRV_VERSION "EHEA_0071"
+#define DRV_VERSION "EHEA_0072"
/* eHEA capability flags */
#define DLPAR_PORT_ADD_REM 1
return 1;
}
+#ifdef CONFIG_NET_POLL_CONTROLLER
+static void ehea_netpoll(struct net_device *dev)
+{
+ struct ehea_port *port = netdev_priv(dev);
+
+ netif_rx_schedule(port->port_res[0].d_netdev);
+}
+#endif
+
+static int ehea_poll_firstqueue(struct net_device *dev, int *budget)
+{
+ struct ehea_port *port = netdev_priv(dev);
+ struct net_device *d_dev = port->port_res[0].d_netdev;
+
+ return ehea_poll(d_dev, budget);
+}
+
static irqreturn_t ehea_recv_irq_handler(int irq, void *param)
{
struct ehea_port_res *pr = param;
memcpy(dev->dev_addr, &port->mac_addr, ETH_ALEN);
dev->open = ehea_open;
- dev->poll = ehea_poll;
+ dev->poll = ehea_poll_firstqueue;
+#ifdef CONFIG_NET_POLL_CONTROLLER
+ dev->poll_controller = ehea_netpoll;
+#endif
dev->weight = 64;
dev->stop = ehea_stop;
dev->hard_start_xmit = ehea_start_xmit;
PCI_DEVICE(PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_NVENET_27),
.driver_data = DEV_NEED_TIMERIRQ|DEV_NEED_LINKTIMER|DEV_HAS_HIGH_DMA|DEV_HAS_POWER_CNTRL|DEV_HAS_MSI|DEV_HAS_PAUSEFRAME_TX|DEV_HAS_STATISTICS_V2|DEV_HAS_TEST_EXTENDED|DEV_HAS_MGMT_UNIT,
},
+ { /* MCP73 Ethernet Controller */
+ PCI_DEVICE(PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_NVENET_28),
+ .driver_data = DEV_NEED_TIMERIRQ|DEV_NEED_LINKTIMER|DEV_HAS_HIGH_DMA|DEV_HAS_POWER_CNTRL|DEV_HAS_MSI|DEV_HAS_PAUSEFRAME_TX|DEV_HAS_STATISTICS_V2|DEV_HAS_TEST_EXTENDED|DEV_HAS_MGMT_UNIT,
+ },
+ { /* MCP73 Ethernet Controller */
+ PCI_DEVICE(PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_NVENET_29),
+ .driver_data = DEV_NEED_TIMERIRQ|DEV_NEED_LINKTIMER|DEV_HAS_HIGH_DMA|DEV_HAS_POWER_CNTRL|DEV_HAS_MSI|DEV_HAS_PAUSEFRAME_TX|DEV_HAS_STATISTICS_V2|DEV_HAS_TEST_EXTENDED|DEV_HAS_MGMT_UNIT,
+ },
+ { /* MCP73 Ethernet Controller */
+ PCI_DEVICE(PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_NVENET_30),
+ .driver_data = DEV_NEED_TIMERIRQ|DEV_NEED_LINKTIMER|DEV_HAS_HIGH_DMA|DEV_HAS_POWER_CNTRL|DEV_HAS_MSI|DEV_HAS_PAUSEFRAME_TX|DEV_HAS_STATISTICS_V2|DEV_HAS_TEST_EXTENDED|DEV_HAS_MGMT_UNIT,
+ },
+ { /* MCP73 Ethernet Controller */
+ PCI_DEVICE(PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_NVENET_31),
+ .driver_data = DEV_NEED_TIMERIRQ|DEV_NEED_LINKTIMER|DEV_HAS_HIGH_DMA|DEV_HAS_POWER_CNTRL|DEV_HAS_MSI|DEV_HAS_PAUSEFRAME_TX|DEV_HAS_STATISTICS_V2|DEV_HAS_TEST_EXTENDED|DEV_HAS_MGMT_UNIT,
+ },
{0,},
};
-/* A simple network driver for lguest.
+/*D:500
+ * The Guest network driver.
*
- * Copyright 2006 Rusty Russell <rusty@rustcorp.com.au> IBM Corporation
+ * This is very simple a virtual network driver, and our last Guest driver.
+ * The only trick is that it can talk directly to multiple other recipients
+ * (ie. other Guests on the same network). It can also be used with only the
+ * Host on the network.
+ :*/
+
+/* Copyright 2006 Rusty Russell <rusty@rustcorp.com.au> IBM Corporation
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
#define MAX_LANS 4
#define NUM_SKBS 8
+/*M:011 Network code master Jeff Garzik points out numerous shortcomings in
+ * this driver if it aspires to greatness.
+ *
+ * Firstly, it doesn't use "NAPI": the networking's New API, and is poorer for
+ * it. As he says "NAPI means system-wide load leveling, across multiple
+ * network interfaces. Lack of NAPI can mean competition at higher loads."
+ *
+ * He also points out that we don't implement set_mac_address, so users cannot
+ * change the devices hardware address. When I asked why one would want to:
+ * "Bonding, and situations where you /do/ want the MAC address to "leak" out
+ * of the host onto the wider net."
+ *
+ * Finally, he would like module unloading: "It is not unrealistic to think of
+ * [un|re|]loading the net support module in an lguest guest. And, adding
+ * module support makes the programmer more responsible, because they now have
+ * to learn to clean up after themselves. Any driver that cannot clean up
+ * after itself is an incomplete driver in my book."
+ :*/
+
+/*D:530 The "struct lguestnet_info" contains all the information we need to
+ * know about the network device. */
struct lguestnet_info
{
- /* The shared page(s). */
+ /* The mapped device page(s) (an array of "struct lguest_net"). */
struct lguest_net *peer;
+ /* The physical address of the device page(s) */
unsigned long peer_phys;
+ /* The size of the device page(s). */
unsigned long mapsize;
/* The lguest_device I come from */
struct lguest_device *lgdev;
- /* My peerid. */
+ /* My peerid (ie. my slot in the array). */
unsigned int me;
- /* Receive queue. */
+ /* Receive queue: the network packets waiting to be filled. */
struct sk_buff *skb[NUM_SKBS];
struct lguest_dma dma[NUM_SKBS];
};
+/*:*/
/* How many bytes left in this page. */
static unsigned int rest_of_page(void *data)
return PAGE_SIZE - ((unsigned long)data % PAGE_SIZE);
}
-/* Simple convention: offset 4 * peernum. */
+/*D:570 Each peer (ie. Guest or Host) on the network binds their receive
+ * buffers to a different key: we simply use the physical address of the
+ * device's memory page plus the peer number. The Host insists that all keys
+ * be a multiple of 4, so we multiply the peer number by 4. */
static unsigned long peer_key(struct lguestnet_info *info, unsigned peernum)
{
return info->peer_phys + 4 * peernum;
}
+/* This is the routine which sets up a "struct lguest_dma" to point to a
+ * network packet, similar to req_to_dma() in lguest_blk.c. The structure of a
+ * "struct sk_buff" has grown complex over the years: it consists of a "head"
+ * linear section pointed to by "skb->data", and possibly an array of
+ * "fragments" in the case of a non-linear packet.
+ *
+ * Our receive buffers don't use fragments at all but outgoing skbs might, so
+ * we handle it. */
static void skb_to_dma(const struct sk_buff *skb, unsigned int headlen,
struct lguest_dma *dma)
{
unsigned int i, seg;
+ /* First, we put the linear region into the "struct lguest_dma". Each
+ * entry can't go over a page boundary, so even though all our packets
+ * are 1514 bytes or less, we might need to use two entries here: */
for (i = seg = 0; i < headlen; seg++, i += rest_of_page(skb->data+i)) {
dma->addr[seg] = virt_to_phys(skb->data + i);
dma->len[seg] = min((unsigned)(headlen - i),
rest_of_page(skb->data + i));
}
+
+ /* Now we handle the fragments: at least they're guaranteed not to go
+ * over a page. skb_shinfo(skb) returns a pointer to the structure
+ * which tells us about the number of fragments and the fragment
+ * array. */
for (i = 0; i < skb_shinfo(skb)->nr_frags; i++, seg++) {
const skb_frag_t *f = &skb_shinfo(skb)->frags[i];
/* Should not happen with MTU less than 64k - 2 * PAGE_SIZE. */
if (seg == LGUEST_MAX_DMA_SECTIONS) {
+ /* We will end up sending a truncated packet should
+ * this ever happen. Plus, a cool log message! */
printk("Woah dude! Megapacket!\n");
break;
}
dma->addr[seg] = page_to_phys(f->page) + f->page_offset;
dma->len[seg] = f->size;
}
+
+ /* If after all that we didn't use the entire "struct lguest_dma"
+ * array, we terminate it with a 0 length. */
if (seg < LGUEST_MAX_DMA_SECTIONS)
dma->len[seg] = 0;
}
-/* We overload multicast bit to show promiscuous mode. */
+/*
+ * Packet transmission.
+ *
+ * Our packet transmission is a little unusual. A real network card would just
+ * send out the packet and leave the receivers to decide if they're interested.
+ * Instead, we look through the network device memory page and see if any of
+ * the ethernet addresses match the packet destination, and if so we send it to
+ * that Guest.
+ *
+ * This is made a little more complicated in two cases. The first case is
+ * broadcast packets: for that we send the packet to all Guests on the network,
+ * one at a time. The second case is "promiscuous" mode, where a Guest wants
+ * to see all the packets on the network. We need a way for the Guest to tell
+ * us it wants to see all packets, so it sets the "multicast" bit on its
+ * published MAC address, which is never valid in a real ethernet address.
+ */
#define PROMISC_BIT 0x01
+/* This is the callback which is summoned whenever the network device's
+ * multicast or promiscuous state changes. If the card is in promiscuous mode,
+ * we advertise that in our ethernet address in the device's memory. We do the
+ * same if Linux wants any or all multicast traffic. */
static void lguestnet_set_multicast(struct net_device *dev)
{
struct lguestnet_info *info = netdev_priv(dev);
info->peer[info->me].mac[0] &= ~PROMISC_BIT;
}
+/* A simple test function to see if a peer wants to see all packets.*/
static int promisc(struct lguestnet_info *info, unsigned int peer)
{
return info->peer[peer].mac[0] & PROMISC_BIT;
}
+/* Another simple function to see if a peer's advertised ethernet address
+ * matches a packet's destination ethernet address. */
static int mac_eq(const unsigned char mac[ETH_ALEN],
struct lguestnet_info *info, unsigned int peer)
{
return memcmp(mac+1, info->peer[peer].mac+1, ETH_ALEN-1) == 0;
}
+/* This is the function which actually sends a packet once we've decided a
+ * peer wants it: */
static void transfer_packet(struct net_device *dev,
struct sk_buff *skb,
unsigned int peernum)
struct lguestnet_info *info = netdev_priv(dev);
struct lguest_dma dma;
+ /* We use our handy "struct lguest_dma" packing function to prepare
+ * the skb for sending. */
skb_to_dma(skb, skb_headlen(skb), &dma);
pr_debug("xfer length %04x (%u)\n", htons(skb->len), skb->len);
+ /* This is the actual send call which copies the packet. */
lguest_send_dma(peer_key(info, peernum), &dma);
+
+ /* Check that the entire packet was transmitted. If not, it could mean
+ * that the other Guest registered a short receive buffer, but this
+ * driver should never do that. More likely, the peer is dead. */
if (dma.used_len != skb->len) {
dev->stats.tx_carrier_errors++;
pr_debug("Bad xfer to peer %i: %i of %i (dma %p/%i)\n",
peernum, dma.used_len, skb->len,
(void *)dma.addr[0], dma.len[0]);
} else {
+ /* On success we update the stats. */
dev->stats.tx_bytes += skb->len;
dev->stats.tx_packets++;
}
}
+/* Another helper function to tell is if a slot in the device memory is unused.
+ * Since we always set the Local Assignment bit in the ethernet address, the
+ * first byte can never be 0. */
static int unused_peer(const struct lguest_net peer[], unsigned int num)
{
return peer[num].mac[0] == 0;
}
+/* Finally, here is the routine which handles an outgoing packet. It's called
+ * "start_xmit" for traditional reasons. */
static int lguestnet_start_xmit(struct sk_buff *skb, struct net_device *dev)
{
unsigned int i;
int broadcast;
struct lguestnet_info *info = netdev_priv(dev);
+ /* Extract the destination ethernet address from the packet. */
const unsigned char *dest = ((struct ethhdr *)skb->data)->h_dest;
pr_debug("%s: xmit %02x:%02x:%02x:%02x:%02x:%02x\n",
dev->name, dest[0],dest[1],dest[2],dest[3],dest[4],dest[5]);
+ /* If it's a multicast packet, we broadcast to everyone. That's not
+ * very efficient, but there are very few applications which actually
+ * use multicast, which is a shame really.
+ *
+ * As etherdevice.h points out: "By definition the broadcast address is
+ * also a multicast address." So we don't have to test for broadcast
+ * packets separately. */
broadcast = is_multicast_ether_addr(dest);
+
+ /* Look through all the published ethernet addresses to see if we
+ * should send this packet. */
for (i = 0; i < info->mapsize/sizeof(struct lguest_net); i++) {
+ /* We don't send to ourselves (we actually can't SEND_DMA to
+ * ourselves anyway), and don't send to unused slots.*/
if (i == info->me || unused_peer(info->peer, i))
continue;
+ /* If it's broadcast we send it. If they want every packet we
+ * send it. If the destination matches their address we send
+ * it. Otherwise we go to the next peer. */
if (!broadcast && !promisc(info, i) && !mac_eq(dest, info, i))
continue;
pr_debug("lguestnet %s: sending from %i to %i\n",
dev->name, info->me, i);
+ /* Our routine which actually does the transfer. */
transfer_packet(dev, skb, i);
}
+
+ /* An xmit routine is expected to dispose of the packet, so we do. */
dev_kfree_skb(skb);
+
+ /* As per kernel convention, 0 means success. This is why I love
+ * networking: even if we never sent to anyone, that's still
+ * success! */
return 0;
}
-/* Find a new skb to put in this slot in shared mem. */
+/*D:560
+ * Packet receiving.
+ *
+ * First, here's a helper routine which fills one of our array of receive
+ * buffers: */
static int fill_slot(struct net_device *dev, unsigned int slot)
{
struct lguestnet_info *info = netdev_priv(dev);
- /* Try to create and register a new one. */
+
+ /* We can receive ETH_DATA_LEN (1500) byte packets, plus a standard
+ * ethernet header of ETH_HLEN (14) bytes. */
info->skb[slot] = netdev_alloc_skb(dev, ETH_HLEN + ETH_DATA_LEN);
if (!info->skb[slot]) {
printk("%s: could not fill slot %i\n", dev->name, slot);
return -ENOMEM;
}
+ /* skb_to_dma() is a helper which sets up the "struct lguest_dma" to
+ * point to the data in the skb: we also use it for sending out a
+ * packet. */
skb_to_dma(info->skb[slot], ETH_HLEN + ETH_DATA_LEN, &info->dma[slot]);
+
+ /* This is a Write Memory Barrier: it ensures that the entry in the
+ * receive buffer array is written *before* we set the "used_len" entry
+ * to 0. If the Host were looking at the receive buffer array from a
+ * different CPU, it could potentially see "used_len = 0" and not see
+ * the updated receive buffer information. This would be a horribly
+ * nasty bug, so make sure the compiler and CPU know this has to happen
+ * first. */
wmb();
- /* Now we tell hypervisor it can use the slot. */
+ /* Writing 0 to "used_len" tells the Host it can use this receive
+ * buffer now. */
info->dma[slot].used_len = 0;
return 0;
}
+/* This is the actual receive routine. When we receive an interrupt from the
+ * Host to tell us a packet has been delivered, we arrive here: */
static irqreturn_t lguestnet_rcv(int irq, void *dev_id)
{
struct net_device *dev = dev_id;
struct lguestnet_info *info = netdev_priv(dev);
unsigned int i, done = 0;
+ /* Look through our entire receive array for an entry which has data
+ * in it. */
for (i = 0; i < ARRAY_SIZE(info->dma); i++) {
unsigned int length;
struct sk_buff *skb;
if (length == 0)
continue;
+ /* We've found one! Remember the skb (we grabbed the length
+ * above), and immediately refill the slot we've taken it
+ * from. */
done++;
skb = info->skb[i];
fill_slot(dev, i);
+ /* This shouldn't happen: micropackets could be sent by a
+ * badly-behaved Guest on the network, but the Host will never
+ * stuff more data in the buffer than the buffer length. */
if (length < ETH_HLEN || length > ETH_HLEN + ETH_DATA_LEN) {
pr_debug(KERN_WARNING "%s: unbelievable skb len: %i\n",
dev->name, length);
continue;
}
+ /* skb_put(), what a great function! I've ranted about this
+ * function before (http://lkml.org/lkml/1999/9/26/24). You
+ * call it after you've added data to the end of an skb (in
+ * this case, it was the Host which wrote the data). */
skb_put(skb, length);
+
+ /* The ethernet header contains a protocol field: we use the
+ * standard helper to extract it, and place the result in
+ * skb->protocol. The helper also sets up skb->pkt_type and
+ * eats up the ethernet header from the front of the packet. */
skb->protocol = eth_type_trans(skb, dev);
- /* This is a reliable transport. */
+
+ /* If this device doesn't need checksums for sending, we also
+ * don't need to check the packets when they come in. */
if (dev->features & NETIF_F_NO_CSUM)
skb->ip_summed = CHECKSUM_UNNECESSARY;
+
+ /* As a last resort for debugging the driver or the lguest I/O
+ * subsystem, you can uncomment the "#define DEBUG" at the top
+ * of this file, which turns all the pr_debug() into printk()
+ * and floods the logs. */
pr_debug("Receiving skb proto 0x%04x len %i type %i\n",
ntohs(skb->protocol), skb->len, skb->pkt_type);
+ /* Update the packet and byte counts (visible from ifconfig,
+ * and good for debugging). */
dev->stats.rx_bytes += skb->len;
dev->stats.rx_packets++;
+
+ /* Hand our fresh network packet into the stack's "network
+ * interface receive" routine. That will free the packet
+ * itself when it's finished. */
netif_rx(skb);
}
+
+ /* If we found any packets, we assume the interrupt was for us. */
return done ? IRQ_HANDLED : IRQ_NONE;
}
+/*D:550 This is where we start: when the device is brought up by dhcpd or
+ * ifconfig. At this point we advertise our MAC address to the rest of the
+ * network, and register receive buffers ready for incoming packets. */
static int lguestnet_open(struct net_device *dev)
{
int i;
struct lguestnet_info *info = netdev_priv(dev);
- /* Set up our MAC address */
+ /* Copy our MAC address into the device page, so others on the network
+ * can find us. */
memcpy(info->peer[info->me].mac, dev->dev_addr, ETH_ALEN);
- /* Turn on promisc mode if needed */
+ /* We might already be in promisc mode (dev->flags & IFF_PROMISC). Our
+ * set_multicast callback handles this already, so we call it now. */
lguestnet_set_multicast(dev);
+ /* Allocate packets and put them into our "struct lguest_dma" array.
+ * If we fail to allocate all the packets we could still limp along,
+ * but it's a sign of real stress so we should probably give up now. */
for (i = 0; i < ARRAY_SIZE(info->dma); i++) {
if (fill_slot(dev, i) != 0)
goto cleanup;
}
+
+ /* Finally we tell the Host where our array of "struct lguest_dma"
+ * receive buffers is, binding it to the key corresponding to the
+ * device's physical memory plus our peerid. */
if (lguest_bind_dma(peer_key(info,info->me), info->dma,
NUM_SKBS, lgdev_irq(info->lgdev)) != 0)
goto cleanup;
dev_kfree_skb(info->skb[i]);
return -ENOMEM;
}
+/*:*/
+/* The close routine is called when the device is no longer in use: we clean up
+ * elegantly. */
static int lguestnet_close(struct net_device *dev)
{
unsigned int i;
struct lguestnet_info *info = netdev_priv(dev);
- /* Clear all trace: others might deliver packets, we'll ignore it. */
+ /* Clear all trace of our existence out of the device memory by setting
+ * the slot which held our MAC address to 0 (unused). */
memset(&info->peer[info->me], 0, sizeof(info->peer[info->me]));
- /* Deregister sg lists. */
+ /* Unregister our array of receive buffers */
lguest_unbind_dma(peer_key(info, info->me), info->dma);
for (i = 0; i < ARRAY_SIZE(info->dma); i++)
dev_kfree_skb(info->skb[i]);
return 0;
}
+/*D:510 The network device probe function is basically a standard ethernet
+ * device setup. It reads the "struct lguest_device_desc" and sets the "struct
+ * net_device". Oh, the line-by-line excitement! Let's skip over it. :*/
static int lguestnet_probe(struct lguest_device *lgdev)
{
int err, irqf = IRQF_SHARED;
dev->stop = lguestnet_close;
dev->hard_start_xmit = lguestnet_start_xmit;
- /* Turning on/off promisc will call dev->set_multicast_list.
- * We don't actually support multicast yet */
+ /* We don't actually support multicast yet, but turning on/off
+ * promisc also calls dev->set_multicast_list. */
dev->set_multicast_list = lguestnet_set_multicast;
SET_NETDEV_DEV(dev, &lgdev->dev);
+
+ /* The network code complains if you have "scatter-gather" capability
+ * if you don't also handle checksums (it seem that would be
+ * "illogical"). So we use a lie of omission and don't tell it that we
+ * can handle scattered packets unless we also don't want checksums,
+ * even though to us they're completely independent. */
if (desc->features & LGUEST_NET_F_NOCSUM)
dev->features = NETIF_F_SG|NETIF_F_NO_CSUM;
}
pr_debug("lguestnet: registered device %s\n", dev->name);
+ /* Finally, we put the "struct net_device" in the generic "struct
+ * lguest_device"s private pointer. Again, it's not necessary, but
+ * makes sure the cool kernel kids don't tease us. */
lgdev->private = dev;
return 0;
MODULE_DESCRIPTION("Lguest network driver");
MODULE_LICENSE("GPL");
+
+/*D:580
+ * This is the last of the Drivers, and with this we have covered the many and
+ * wonderous and fine (and boring) details of the Guest.
+ *
+ * "make Launcher" beckons, where we answer questions like "Where do Guests
+ * come from?", and "What do you do when someone asks for optimization?"
+ */
int txsr, isr, tickssofar = jiffies - dev->trans_start;
unsigned long flags;
-#if defined(CONFIG_M32R) && defined(CONFIG_SMP)
- unsigned long icucr;
-
- local_irq_save(flags);
- icucr = inl(M32R_ICU_CR1_PORTL);
- icucr |= M32R_ICUCR_ISMOD11;
- outl(icucr, M32R_ICU_CR1_PORTL);
- local_irq_restore(flags);
-#endif
ei_local->stat.tx_errors++;
spin_lock_irqsave(&ei_local->page_lock, flags);
NETXEN_CAM_RAM(NETXEN_CAM_RAM_DMA_WATCHDOG_CTRL), &ctrl, 4))
printk(KERN_ERR "failed to read dma watchdog status\n");
- return ((netxen_get_dma_watchdog_enabled(ctrl) == 0) &&
- (netxen_get_dma_watchdog_disabled(ctrl) == 0));
+ return (netxen_get_dma_watchdog_enabled(ctrl) == 0);
}
static inline int
MODULE_LICENSE("GPL");
MODULE_VERSION(NETXEN_NIC_LINUX_VERSIONID);
-char netxen_nic_driver_name[] = "netxen-nic";
+char netxen_nic_driver_name[] = "netxen_nic";
static char netxen_nic_driver_string[] = "NetXen Network Driver version "
NETXEN_NIC_LINUX_VERSIONID;
NETXEN_CRB_NORMALIZE(adapter,
NETXEN_ROMUSB_GLB_PEGTUNE_DONE));
/* Handshake with the card before we register the devices. */
+ writel(0, NETXEN_CRB_NORMALIZE(adapter, CRB_CMDPEG_STATE));
+ netxen_pinit_from_rom(adapter, 0);
+ msleep(1);
+ netxen_load_firmware(adapter);
netxen_phantom_init(adapter, NETXEN_NIC_PEG_TUNE);
}
if (adapter->portnum == 0) {
if (init_firmware_done) {
- dma_watchdog_shutdown_request(adapter);
- msleep(100);
i = 100;
- while ((dma_watchdog_shutdown_poll_result(adapter) != 1) && i) {
- printk(KERN_INFO "dma_watchdog_shutdown_poll still in progress\n");
+ do {
+ if (dma_watchdog_shutdown_request(adapter) == 1)
+ break;
msleep(100);
- i--;
- }
+ if (dma_watchdog_shutdown_poll_result(adapter) == 1)
+ break;
+ } while (--i);
- if (i == 0) {
- printk(KERN_ERR "dma_watchdog_shutdown_request failed\n");
- return;
- }
+ if (i == 0)
+ printk(KERN_ERR "%s: dma_watchdog_shutdown failed\n",
+ netdev->name);
/* clear the register for future unloads/loads */
writel(0, NETXEN_CRB_NORMALIZE(adapter, NETXEN_CAM_RAM(0x1fc)));
/* leave the hw in the same state as reboot */
writel(0, NETXEN_CRB_NORMALIZE(adapter, CRB_CMDPEG_STATE));
- if (netxen_pinit_from_rom(adapter, 0))
- return;
+ netxen_pinit_from_rom(adapter, 0);
msleep(1);
- if (netxen_load_firmware(adapter))
- return;
+ netxen_load_firmware(adapter);
netxen_phantom_init(adapter, NETXEN_NIC_PEG_TUNE);
}
printk(KERN_INFO "State: 0x%0x\n",
readl(NETXEN_CRB_NORMALIZE(adapter, CRB_CMDPEG_STATE)));
- dma_watchdog_shutdown_request(adapter);
- msleep(100);
i = 100;
- while ((dma_watchdog_shutdown_poll_result(adapter) != 1) && i) {
- printk(KERN_INFO "dma_watchdog_shutdown_poll still in progress\n");
+ do {
+ if (dma_watchdog_shutdown_request(adapter) == 1)
+ break;
msleep(100);
- i--;
- }
+ if (dma_watchdog_shutdown_poll_result(adapter) == 1)
+ break;
+ } while (--i);
if (i) {
netxen_free_adapter_offload(adapter);
} else {
- printk(KERN_ERR "failed to dma shutdown\n");
- return;
+ printk(KERN_ERR "%s: dma_watchdog_shutdown failed\n",
+ netdev->name);
}
-
}
iounmap(adapter->ahw.db_base);
*/
err = phy_read(phydev, MII_VSC8244_ISTAT);
- if (err)
+ if (err < 0)
return err;
err = phy_write(phydev, MII_VSC8244_IMASK, 0);
*/
static int pppol2tp_tunnel_getsockopt(struct sock *sk,
struct pppol2tp_tunnel *tunnel,
- int optname, int __user *val)
+ int optname, int *val)
{
int err = 0;
*/
static int pppol2tp_session_getsockopt(struct sock *sk,
struct pppol2tp_session *session,
- int optname, int __user *val)
+ int optname, int *val)
{
int err = 0;
descr->buf_addr = 0;
dev_kfree_skb_any(descr->skb);
descr->skb = NULL;
- descr->dmac_cmd_status = GELIC_NET_DESCR_NOT_IN_USE;
+ gelic_net_set_descr_status(descr,
+ GELIC_NET_DESCR_NOT_IN_USE);
}
descr = descr->next;
} while (descr != card->rx_chain.head);
descr->skb = NULL;
/* set descr status */
- descr->dmac_cmd_status = GELIC_NET_DMAC_CMDSTAT_NOT_IN_USE;
+ gelic_net_set_descr_status(descr, GELIC_NET_DESCR_NOT_IN_USE);
}
/**
"%s: forcing end of tx descriptor " \
"with status %x\n",
__func__, status);
- card->netdev_stats.tx_dropped++;
+ card->netdev->stats.tx_dropped++;
break;
case GELIC_NET_DESCR_COMPLETE:
- card->netdev_stats.tx_packets++;
- card->netdev_stats.tx_bytes +=
- tx_chain->tail->skb->len;
+ if (tx_chain->tail->skb) {
+ card->netdev->stats.tx_packets++;
+ card->netdev->stats.tx_bytes +=
+ tx_chain->tail->skb->len;
+ }
break;
case GELIC_NET_DESCR_CARDOWNED:
/* pending tx request */
default:
/* any other value (== GELIC_NET_DESCR_NOT_IN_USE) */
- goto out;
+ if (!stop)
+ goto out;
}
gelic_net_release_tx_descr(card, tx_chain->tail);
- release = 1;
+ release ++;
}
out:
- if (!stop && release)
+ if (!stop && (2 < release))
netif_wake_queue(card->netdev);
}
{
dma_addr_t buf[2];
unsigned int vlan_len;
+ struct gelic_net_descr *sec_descr = descr->next;
if (skb->len < GELIC_NET_VLAN_POS)
return -EINVAL;
- memcpy(&descr->vlan, skb->data, GELIC_NET_VLAN_POS);
+ vlan_len = GELIC_NET_VLAN_POS;
+ memcpy(&descr->vlan, skb->data, vlan_len);
if (card->vlan_index != -1) {
+ /* internal vlan tag used */
descr->vlan.h_vlan_proto = htons(ETH_P_8021Q); /* vlan 0x8100*/
descr->vlan.h_vlan_TCI = htons(card->vlan_id[card->vlan_index]);
- vlan_len = GELIC_NET_VLAN_POS + VLAN_HLEN; /* VLAN_HLEN=4 */
- } else
- vlan_len = GELIC_NET_VLAN_POS; /* no vlan tag */
+ vlan_len += VLAN_HLEN; /* added for above two lines */
+ }
- /* first descr */
+ /* map data area */
buf[0] = dma_map_single(ctodev(card), &descr->vlan,
vlan_len, DMA_TO_DEVICE);
return -ENOMEM;
}
- descr->buf_addr = buf[0];
- descr->buf_size = vlan_len;
- descr->skb = skb; /* not used */
- descr->data_status = 0;
- gelic_net_set_txdescr_cmdstat(descr, skb, 1); /* not the frame end */
-
- /* second descr */
- card->tx_chain.head = card->tx_chain.head->next;
- descr->next_descr_addr = descr->next->bus_addr;
- descr = descr->next;
- if (gelic_net_get_descr_status(descr) != GELIC_NET_DESCR_NOT_IN_USE)
- /* XXX will be removed */
- dev_err(ctodev(card), "descr is not free!\n");
-
buf[1] = dma_map_single(ctodev(card), skb->data + GELIC_NET_VLAN_POS,
skb->len - GELIC_NET_VLAN_POS,
DMA_TO_DEVICE);
return -ENOMEM;
}
- descr->buf_addr = buf[1];
- descr->buf_size = skb->len - GELIC_NET_VLAN_POS;
- descr->skb = skb;
+ /* first descr */
+ descr->buf_addr = buf[0];
+ descr->buf_size = vlan_len;
+ descr->skb = NULL; /* not used */
descr->data_status = 0;
- descr->next_descr_addr = 0; /* terminate hw descr */
- gelic_net_set_txdescr_cmdstat(descr, skb, 0);
+ descr->next_descr_addr = descr->next->bus_addr;
+ gelic_net_set_txdescr_cmdstat(descr, skb, 1); /* not the frame end */
+ /* second descr */
+ sec_descr->buf_addr = buf[1];
+ sec_descr->buf_size = skb->len - GELIC_NET_VLAN_POS;
+ sec_descr->skb = skb;
+ sec_descr->data_status = 0;
+ sec_descr->next_descr_addr = 0; /* terminate hw descr */
+ gelic_net_set_txdescr_cmdstat(sec_descr, skb, 0);
+
+ /* bump free descriptor pointer */
+ card->tx_chain.head = sec_descr->next;
return 0;
}
static int gelic_net_kick_txdma(struct gelic_net_card *card,
struct gelic_net_descr *descr)
{
- int status = -ENXIO;
+ int status = 0;
int count = 10;
if (card->tx_dma_progress)
static int gelic_net_xmit(struct sk_buff *skb, struct net_device *netdev)
{
struct gelic_net_card *card = netdev_priv(netdev);
- struct gelic_net_descr *descr = NULL;
+ struct gelic_net_descr *descr;
int result;
unsigned long flags;
spin_lock_irqsave(&card->tx_dma_lock, flags);
gelic_net_release_tx_chain(card, 0);
- if (!skb)
- goto kick;
+
descr = gelic_net_get_next_tx_descr(card);
if (!descr) {
+ /*
+ * no more descriptors free
+ */
netif_stop_queue(netdev);
spin_unlock_irqrestore(&card->tx_dma_lock, flags);
return NETDEV_TX_BUSY;
}
- result = gelic_net_prepare_tx_descr_v(card, descr, skb);
-
- if (result)
- goto error;
- card->tx_chain.head = card->tx_chain.head->next;
-
- if (descr->prev)
- descr->prev->next_descr_addr = descr->bus_addr;
-kick:
+ result = gelic_net_prepare_tx_descr_v(card, descr, skb);
+ if (result) {
+ /*
+ * DMA map failed. As chanses are that failure
+ * would continue, just release skb and return
+ */
+ card->netdev->stats.tx_dropped++;
+ dev_kfree_skb_any(skb);
+ spin_unlock_irqrestore(&card->tx_dma_lock, flags);
+ return NETDEV_TX_OK;
+ }
+ /*
+ * link this prepared descriptor to previous one
+ * to achieve high performance
+ */
+ descr->prev->next_descr_addr = descr->bus_addr;
/*
* as hardware descriptor is modified in the above lines,
* ensure that the hardware sees it
*/
wmb();
- if (gelic_net_kick_txdma(card, card->tx_chain.tail))
- goto error;
+ if (gelic_net_kick_txdma(card, descr)) {
+ /*
+ * kick failed.
+ * release descriptors which were just prepared
+ */
+ card->netdev->stats.tx_dropped++;
+ gelic_net_release_tx_descr(card, descr);
+ gelic_net_release_tx_descr(card, descr->next);
+ card->tx_chain.tail = descr->next->next;
+ dev_info(ctodev(card), "%s: kick failure\n", __func__);
+ } else {
+ /* OK, DMA started/reserved */
+ netdev->trans_start = jiffies;
+ }
- netdev->trans_start = jiffies;
spin_unlock_irqrestore(&card->tx_dma_lock, flags);
return NETDEV_TX_OK;
-
-error:
- card->netdev_stats.tx_dropped++;
- spin_unlock_irqrestore(&card->tx_dma_lock, flags);
- return NETDEV_TX_LOCKED;
}
/**
skb->ip_summed = CHECKSUM_NONE;
/* update netdevice statistics */
- card->netdev_stats.rx_packets++;
- card->netdev_stats.rx_bytes += skb->len;
+ card->netdev->stats.rx_packets++;
+ card->netdev->stats.rx_bytes += skb->len;
/* pass skb up to stack */
netif_receive_skb(skb);
(status == GELIC_NET_DESCR_FORCE_END)) {
dev_info(ctodev(card), "dropping RX descriptor with state %x\n",
status);
- card->netdev_stats.rx_dropped++;
+ card->netdev->stats.rx_dropped++;
goto refill;
}
- if ((status != GELIC_NET_DESCR_COMPLETE) &&
- (status != GELIC_NET_DESCR_FRAME_END)) {
+ if (status == GELIC_NET_DESCR_BUFFER_FULL) {
+ /*
+ * Buffer full would occur if and only if
+ * the frame length was longer than the size of this
+ * descriptor's buffer. If the frame length was equal
+ * to or shorter than buffer'size, FRAME_END condition
+ * would occur.
+ * Anyway this frame was longer than the MTU,
+ * just drop it.
+ */
+ dev_info(ctodev(card), "overlength frame\n");
+ goto refill;
+ }
+ /*
+ * descriptoers any other than FRAME_END here should
+ * be treated as error.
+ */
+ if (status != GELIC_NET_DESCR_FRAME_END) {
dev_dbg(ctodev(card), "RX descriptor with state %x\n",
status);
goto refill;
}
/* ok, we've got a packet in descr */
- gelic_net_pass_skb_up(descr, card); /* 1: skb_up sccess */
-
+ gelic_net_pass_skb_up(descr, card);
refill:
- descr->next_descr_addr = 0; /* unlink the descr */
+ /*
+ * So that always DMAC can see the end
+ * of the descriptor chain to avoid
+ * from unwanted DMAC overrun.
+ */
+ descr->next_descr_addr = 0;
/* change the descriptor state: */
gelic_net_set_descr_status(descr, GELIC_NET_DESCR_NOT_IN_USE);
- /* refill one desc
- * FIXME: this can fail, but for now, just leave this
- * descriptor without skb
+ /*
+ * this call can fail, but for now, just leave this
+ * decriptor without skb
*/
gelic_net_prepare_rx_descr(card, descr);
+
chain->head = descr;
chain->tail = descr->next;
+
+ /*
+ * Set this descriptor the end of the chain.
+ */
descr->prev->next_descr_addr = descr->bus_addr;
+ /*
+ * If dmac chain was met, DMAC stopped.
+ * thus re-enable it
+ */
if (dmac_chain_ended) {
- gelic_net_enable_rxdmac(card);
- dev_dbg(ctodev(card), "reenable rx dma\n");
+ card->rx_dma_restart_required = 1;
+ dev_dbg(ctodev(card), "reenable rx dma scheduled\n");
}
return 1;
} else
return 1;
}
-
-/**
- * gelic_net_get_stats - get interface statistics
- * @netdev: interface device structure
- *
- * returns the interface statistics residing in the gelic_net_card struct
- */
-static struct net_device_stats *gelic_net_get_stats(struct net_device *netdev)
-{
- struct gelic_net_card *card = netdev_priv(netdev);
-
- return &card->netdev_stats;
-}
-
/**
* gelic_net_change_mtu - changes the MTU of an interface
* @netdev: interface device structure
if (!status)
return IRQ_NONE;
+ if (card->rx_dma_restart_required) {
+ card->rx_dma_restart_required = 0;
+ gelic_net_enable_rxdmac(card);
+ }
+
if (status & GELIC_NET_RXINT) {
gelic_net_rx_irq_off(card);
netif_rx_schedule(netdev);
if (status & GELIC_NET_TXINT) {
spin_lock_irqsave(&card->tx_dma_lock, flags);
card->tx_dma_progress = 0;
+ gelic_net_release_tx_chain(card, 0);
+ /* kick outstanding tx descriptor if any */
+ gelic_net_kick_txdma(card, card->tx_chain.tail);
spin_unlock_irqrestore(&card->tx_dma_lock, flags);
- /* start pending DMA */
- gelic_net_xmit(NULL, netdev);
}
return IRQ_HANDLED;
}
}
result = request_irq(card->netdev->irq, gelic_net_interrupt,
- IRQF_DISABLED, "gelic network", card->netdev);
+ IRQF_DISABLED, card->netdev->name, card->netdev);
if (result) {
dev_info(ctodev(card), "%s:%d: request_irq failed (%d)\n",
card->descr, GELIC_NET_TX_DESCRIPTORS))
goto alloc_tx_failed;
if (gelic_net_init_chain(card, &card->rx_chain,
- card->descr + GELIC_NET_RX_DESCRIPTORS,
+ card->descr + GELIC_NET_TX_DESCRIPTORS,
GELIC_NET_RX_DESCRIPTORS))
goto alloc_rx_failed;
netif_start_queue(netdev);
netif_carrier_on(netdev);
- netif_poll_enable(netdev);
return 0;
return -ENOMEM;
}
-#ifdef GELIC_NET_ETHTOOL
static void gelic_net_get_drvinfo (struct net_device *netdev,
struct ethtool_drvinfo *info)
{
.get_rx_csum = gelic_net_get_rx_csum,
.set_rx_csum = gelic_net_set_rx_csum,
};
-#endif
/**
* gelic_net_tx_timeout_task - task scheduled by the watchdog timeout
netdev->open = &gelic_net_open;
netdev->stop = &gelic_net_stop;
netdev->hard_start_xmit = &gelic_net_xmit;
- netdev->get_stats = &gelic_net_get_stats;
netdev->set_multicast_list = &gelic_net_set_multi;
netdev->change_mtu = &gelic_net_change_mtu;
/* tx watchdog */
/* NAPI */
netdev->poll = &gelic_net_poll;
netdev->weight = GELIC_NET_NAPI_WEIGHT;
-#ifdef GELIC_NET_ETHTOOL
netdev->ethtool_ops = &gelic_net_ethtool_ops;
-#endif
}
/**
#ifndef _GELIC_NET_H
#define _GELIC_NET_H
-#define GELIC_NET_DRV_NAME "Gelic Network Driver"
-#define GELIC_NET_DRV_VERSION "1.0"
-
-#define GELIC_NET_ETHTOOL /* use ethtool */
-
-/* ioctl */
-#define GELIC_NET_GET_MODE (SIOCDEVPRIVATE + 0)
-#define GELIC_NET_SET_MODE (SIOCDEVPRIVATE + 1)
-
/* descriptors */
#define GELIC_NET_RX_DESCRIPTORS 128 /* num of descriptors */
#define GELIC_NET_TX_DESCRIPTORS 128 /* num of descriptors */
-#define GELIC_NET_MAX_MTU 2308
-#define GELIC_NET_MIN_MTU 64
+#define GELIC_NET_MAX_MTU VLAN_ETH_FRAME_LEN
+#define GELIC_NET_MIN_MTU VLAN_ETH_ZLEN
#define GELIC_NET_RXBUF_ALIGN 128
#define GELIC_NET_RX_CSUM_DEFAULT 1 /* hw chksum */
#define GELIC_NET_WATCHDOG_TIMEOUT 5*HZ
*/
#define GELIC_NET_RXVLNPKT 0x00200000 /* VLAN packet */
/* bit 20..16 reserved */
-#define GELIC_NET_RXRECNUM 0x0000ff00 /* reception receipt number */
+#define GELIC_NET_RXRRECNUM 0x0000ff00 /* reception receipt number */
+#define GELIC_NET_RXRRECNUM_SHIFT 8
/* bit 7..0 reserved */
#define GELIC_NET_TXDESC_TAIL 0
* interrupt status */
#define GELIC_NET_DMAC_CMDSTAT_CHAIN_END 0x00000002 /* RXDCEIS:DMA stopped */
-#define GELIC_NET_DMAC_CMDSTAT_NOT_IN_USE 0xb0000000
#define GELIC_NET_DESCR_IND_PROC_SHIFT 28
#define GELIC_NET_DESCR_IND_PROC_MASKO 0x0fffffff
enum gelic_net_descr_status {
- GELIC_NET_DESCR_COMPLETE = 0x00, /* used in rx and tx */
+ GELIC_NET_DESCR_COMPLETE = 0x00, /* used in tx */
+ GELIC_NET_DESCR_BUFFER_FULL = 0x00, /* used in rx */
GELIC_NET_DESCR_RESPONSE_ERROR = 0x01, /* used in rx and tx */
GELIC_NET_DESCR_PROTECTION_ERROR = 0x02, /* used in rx and tx */
GELIC_NET_DESCR_FRAME_END = 0x04, /* used in rx */
GELIC_NET_DESCR_FORCE_END = 0x05, /* used in rx and tx */
GELIC_NET_DESCR_CARDOWNED = 0x0a, /* used in rx and tx */
- GELIC_NET_DESCR_NOT_IN_USE /* any other value */
+ GELIC_NET_DESCR_NOT_IN_USE = 0x0b /* any other value */
};
/* for lv1_net_control */
#define GELIC_NET_GET_MAC_ADDRESS 0x0000000000000001
struct gelic_net_descr_chain tx_chain;
struct gelic_net_descr_chain rx_chain;
+ int rx_dma_restart_required;
/* gurad dmac descriptor chain*/
spinlock_t chain_lock;
- struct net_device_stats netdev_stats;
int rx_csum;
/* guard tx_dma_progress */
spinlock_t tx_dma_lock;
#undef DEBUG
-#define DRV_DESC "QE UCC Gigabit Ethernet Controller"
-#define DRV_NAME "ucc_geth"
-#define DRV_VERSION "1.1"
-
#define ugeth_printk(level, format, arg...) \
printk(level format "\n", ## arg)
#else
#define ugeth_vdbg(fmt, args...) do { } while (0)
#endif /* UGETH_VERBOSE_DEBUG */
+#define UGETH_MSG_DEFAULT (NETIF_MSG_IFUP << 1 ) - 1
+void uec_set_ethtool_ops(struct net_device *netdev);
+
static DEFINE_SPINLOCK(ugeth_lock);
+static struct {
+ u32 msg_enable;
+} debug = { -1 };
+
+module_param_named(debug, debug.msg_enable, int, 0);
+MODULE_PARM_DESC(debug, "Debug verbosity level (0=none, ..., 0xffff=all)");
+
static struct ucc_geth_info ugeth_primary_info = {
.uf_info = {
.bd_mem_part = MEM_PART_SYSTEM,
.maxRetransmission = 0xf,
.collisionWindow = 0x37,
.receiveFlowControl = 1,
+ .transmitFlowControl = 1,
.maxGroupAddrInHash = 4,
.maxIndAddrInHash = 4,
.prel = 7,
.numStationAddresses = UCC_GETH_NUM_OF_STATION_ADDRESSES_1,
.largestexternallookupkeysize =
QE_FLTR_LARGEST_EXTERNAL_TABLE_LOOKUP_KEY_SIZE_NONE,
- .statisticsMode = UCC_GETH_STATISTICS_GATHERING_MODE_NONE,
+ .statisticsMode = UCC_GETH_STATISTICS_GATHERING_MODE_HARDWARE |
+ UCC_GETH_STATISTICS_GATHERING_MODE_FIRMWARE_TX |
+ UCC_GETH_STATISTICS_GATHERING_MODE_FIRMWARE_RX,
.vlanOperationTagged = UCC_GETH_VLAN_OPERATION_TAGGED_NOP,
.vlanOperationNonTagged = UCC_GETH_VLAN_OPERATION_NON_TAGGED_NOP,
.rxQoSMode = UCC_GETH_QOS_MODE_DEFAULT,
for (i = 0; i < num_entries; i++) {
if ((snum = qe_get_snum()) < 0) {
- ugeth_err("fill_init_enet_entries: Can not get SNUM.");
+ if (netif_msg_ifup(ugeth))
+ ugeth_err("fill_init_enet_entries: Can not get SNUM.");
return snum;
}
if ((i == 0) && skip_page_for_first_entry)
init_enet_offset =
qe_muram_alloc(thread_size, thread_alignment);
if (IS_ERR_VALUE(init_enet_offset)) {
- ugeth_err
- ("fill_init_enet_entries: Can not allocate DPRAM memory.");
+ if (netif_msg_ifup(ugeth))
+ ugeth_err("fill_init_enet_entries: Can not allocate DPRAM memory.");
qe_put_snum((u8) snum);
return -ENOMEM;
}
return 0;
}
-static int init_flow_control_params(u32 automatic_flow_control_mode,
+int init_flow_control_params(u32 automatic_flow_control_mode,
int rx_flow_control_enable,
int tx_flow_control_enable,
u16 pause_period,
ret_val = init_preamble_length(ug_info->prel, &ug_regs->maccfg2);
if (ret_val != 0) {
- ugeth_err
- ("%s: Preamble length must be between 3 and 7 inclusive.",
- __FUNCTION__);
+ if (netif_msg_probe(ugeth))
+ ugeth_err("%s: Preamble length must be between 3 and 7 inclusive.",
+ __FUNCTION__);
return ret_val;
}
/* check if the UCC number is in range. */
if (ugeth->ug_info->uf_info.ucc_num >= UCC_MAX_NUM) {
- ugeth_err("%s: ucc_num out of range.", __FUNCTION__);
+ if (netif_msg_probe(ugeth))
+ ugeth_err("%s: ucc_num out of range.", __FUNCTION__);
return -EINVAL;
}
/* check if the UCC number is in range. */
if (ugeth->ug_info->uf_info.ucc_num >= UCC_MAX_NUM) {
- ugeth_err("%s: ucc_num out of range.", __FUNCTION__);
+ if (netif_msg_probe(ugeth))
+ ugeth_err("%s: ucc_num out of range.", __FUNCTION__);
return -EINVAL;
}
if (!((uf_info->bd_mem_part == MEM_PART_SYSTEM) ||
(uf_info->bd_mem_part == MEM_PART_MURAM))) {
- ugeth_err("%s: Bad memory partition value.", __FUNCTION__);
+ if (netif_msg_probe(ugeth))
+ ugeth_err("%s: Bad memory partition value.",
+ __FUNCTION__);
return -EINVAL;
}
if ((ug_info->bdRingLenRx[i] < UCC_GETH_RX_BD_RING_SIZE_MIN) ||
(ug_info->bdRingLenRx[i] %
UCC_GETH_RX_BD_RING_SIZE_ALIGNMENT)) {
- ugeth_err
- ("%s: Rx BD ring length must be multiple of 4,"
- " no smaller than 8.", __FUNCTION__);
+ if (netif_msg_probe(ugeth))
+ ugeth_err
+ ("%s: Rx BD ring length must be multiple of 4, no smaller than 8.",
+ __FUNCTION__);
return -EINVAL;
}
}
/* Tx BD lengths */
for (i = 0; i < ug_info->numQueuesTx; i++) {
if (ug_info->bdRingLenTx[i] < UCC_GETH_TX_BD_RING_SIZE_MIN) {
- ugeth_err
- ("%s: Tx BD ring length must be no smaller than 2.",
- __FUNCTION__);
+ if (netif_msg_probe(ugeth))
+ ugeth_err
+ ("%s: Tx BD ring length must be no smaller than 2.",
+ __FUNCTION__);
return -EINVAL;
}
}
/* mrblr */
if ((uf_info->max_rx_buf_length == 0) ||
(uf_info->max_rx_buf_length % UCC_GETH_MRBLR_ALIGNMENT)) {
- ugeth_err
- ("%s: max_rx_buf_length must be non-zero multiple of 128.",
- __FUNCTION__);
+ if (netif_msg_probe(ugeth))
+ ugeth_err
+ ("%s: max_rx_buf_length must be non-zero multiple of 128.",
+ __FUNCTION__);
return -EINVAL;
}
/* num Tx queues */
if (ug_info->numQueuesTx > NUM_TX_QUEUES) {
- ugeth_err("%s: number of tx queues too large.", __FUNCTION__);
+ if (netif_msg_probe(ugeth))
+ ugeth_err("%s: number of tx queues too large.", __FUNCTION__);
return -EINVAL;
}
/* num Rx queues */
if (ug_info->numQueuesRx > NUM_RX_QUEUES) {
- ugeth_err("%s: number of rx queues too large.", __FUNCTION__);
+ if (netif_msg_probe(ugeth))
+ ugeth_err("%s: number of rx queues too large.", __FUNCTION__);
return -EINVAL;
}
/* l2qt */
for (i = 0; i < UCC_GETH_VLAN_PRIORITY_MAX; i++) {
if (ug_info->l2qt[i] >= ug_info->numQueuesRx) {
- ugeth_err
- ("%s: VLAN priority table entry must not be"
- " larger than number of Rx queues.",
- __FUNCTION__);
+ if (netif_msg_probe(ugeth))
+ ugeth_err
+ ("%s: VLAN priority table entry must not be"
+ " larger than number of Rx queues.",
+ __FUNCTION__);
return -EINVAL;
}
}
/* l3qt */
for (i = 0; i < UCC_GETH_IP_PRIORITY_MAX; i++) {
if (ug_info->l3qt[i] >= ug_info->numQueuesRx) {
- ugeth_err
- ("%s: IP priority table entry must not be"
- " larger than number of Rx queues.",
- __FUNCTION__);
+ if (netif_msg_probe(ugeth))
+ ugeth_err
+ ("%s: IP priority table entry must not be"
+ " larger than number of Rx queues.",
+ __FUNCTION__);
return -EINVAL;
}
}
if (ug_info->cam && !ug_info->ecamptr) {
- ugeth_err("%s: If cam mode is chosen, must supply cam ptr.",
- __FUNCTION__);
+ if (netif_msg_probe(ugeth))
+ ugeth_err("%s: If cam mode is chosen, must supply cam ptr.",
+ __FUNCTION__);
return -EINVAL;
}
if ((ug_info->numStationAddresses !=
UCC_GETH_NUM_OF_STATION_ADDRESSES_1)
&& ug_info->rxExtendedFiltering) {
- ugeth_err("%s: Number of station addresses greater than 1 "
- "not allowed in extended parsing mode.",
- __FUNCTION__);
+ if (netif_msg_probe(ugeth))
+ ugeth_err("%s: Number of station addresses greater than 1 "
+ "not allowed in extended parsing mode.",
+ __FUNCTION__);
return -EINVAL;
}
uf_info->uccm_mask |= (UCCE_TXBF_SINGLE_MASK << i);
/* Initialize the general fast UCC block. */
if (ucc_fast_init(uf_info, &ugeth->uccf)) {
- ugeth_err("%s: Failed to init uccf.", __FUNCTION__);
+ if (netif_msg_probe(ugeth))
+ ugeth_err("%s: Failed to init uccf.", __FUNCTION__);
ucc_geth_memclean(ugeth);
return -ENOMEM;
}
numThreadsRxNumerical = 8;
break;
default:
- ugeth_err("%s: Bad number of Rx threads value.", __FUNCTION__);
+ if (netif_msg_ifup(ugeth))
+ ugeth_err("%s: Bad number of Rx threads value.",
+ __FUNCTION__);
ucc_geth_memclean(ugeth);
return -EINVAL;
break;
numThreadsTxNumerical = 8;
break;
default:
- ugeth_err("%s: Bad number of Tx threads value.", __FUNCTION__);
+ if (netif_msg_ifup(ugeth))
+ ugeth_err("%s: Bad number of Tx threads value.",
+ __FUNCTION__);
ucc_geth_memclean(ugeth);
return -EINVAL;
break;
/* For more details see the hardware spec. */
init_flow_control_params(ug_info->aufc,
ug_info->receiveFlowControl,
- 1,
+ ug_info->transmitFlowControl,
ug_info->pausePeriod,
ug_info->extensionField,
&uf_regs->upsmr,
ug_info->backToBackInterFrameGap,
&ug_regs->ipgifg);
if (ret_val != 0) {
- ugeth_err("%s: IPGIFG initialization parameter too large.",
- __FUNCTION__);
+ if (netif_msg_ifup(ugeth))
+ ugeth_err("%s: IPGIFG initialization parameter too large.",
+ __FUNCTION__);
ucc_geth_memclean(ugeth);
return ret_val;
}
ug_info->collisionWindow,
&ug_regs->hafdup);
if (ret_val != 0) {
- ugeth_err("%s: Half Duplex initialization parameter too large.",
+ if (netif_msg_ifup(ugeth))
+ ugeth_err("%s: Half Duplex initialization parameter too large.",
__FUNCTION__);
ucc_geth_memclean(ugeth);
return ret_val;
tx_bd_ring_offset[j]);
}
if (!ugeth->p_tx_bd_ring[j]) {
- ugeth_err
- ("%s: Can not allocate memory for Tx bd rings.",
- __FUNCTION__);
+ if (netif_msg_ifup(ugeth))
+ ugeth_err
+ ("%s: Can not allocate memory for Tx bd rings.",
+ __FUNCTION__);
ucc_geth_memclean(ugeth);
return -ENOMEM;
}
rx_bd_ring_offset[j]);
}
if (!ugeth->p_rx_bd_ring[j]) {
- ugeth_err
- ("%s: Can not allocate memory for Rx bd rings.",
- __FUNCTION__);
+ if (netif_msg_ifup(ugeth))
+ ugeth_err
+ ("%s: Can not allocate memory for Rx bd rings.",
+ __FUNCTION__);
ucc_geth_memclean(ugeth);
return -ENOMEM;
}
GFP_KERNEL);
if (ugeth->tx_skbuff[j] == NULL) {
- ugeth_err("%s: Could not allocate tx_skbuff",
- __FUNCTION__);
+ if (netif_msg_ifup(ugeth))
+ ugeth_err("%s: Could not allocate tx_skbuff",
+ __FUNCTION__);
ucc_geth_memclean(ugeth);
return -ENOMEM;
}
GFP_KERNEL);
if (ugeth->rx_skbuff[j] == NULL) {
- ugeth_err("%s: Could not allocate rx_skbuff",
- __FUNCTION__);
+ if (netif_msg_ifup(ugeth))
+ ugeth_err("%s: Could not allocate rx_skbuff",
+ __FUNCTION__);
ucc_geth_memclean(ugeth);
return -ENOMEM;
}
qe_muram_alloc(sizeof(struct ucc_geth_tx_global_pram),
UCC_GETH_TX_GLOBAL_PRAM_ALIGNMENT);
if (IS_ERR_VALUE(ugeth->tx_glbl_pram_offset)) {
- ugeth_err
- ("%s: Can not allocate DPRAM memory for p_tx_glbl_pram.",
- __FUNCTION__);
+ if (netif_msg_ifup(ugeth))
+ ugeth_err
+ ("%s: Can not allocate DPRAM memory for p_tx_glbl_pram.",
+ __FUNCTION__);
ucc_geth_memclean(ugeth);
return -ENOMEM;
}
32 * (numThreadsTxNumerical == 1),
UCC_GETH_THREAD_DATA_ALIGNMENT);
if (IS_ERR_VALUE(ugeth->thread_dat_tx_offset)) {
- ugeth_err
- ("%s: Can not allocate DPRAM memory for p_thread_data_tx.",
- __FUNCTION__);
+ if (netif_msg_ifup(ugeth))
+ ugeth_err
+ ("%s: Can not allocate DPRAM memory for p_thread_data_tx.",
+ __FUNCTION__);
ucc_geth_memclean(ugeth);
return -ENOMEM;
}
sizeof(struct ucc_geth_send_queue_qd),
UCC_GETH_SEND_QUEUE_QUEUE_DESCRIPTOR_ALIGNMENT);
if (IS_ERR_VALUE(ugeth->send_q_mem_reg_offset)) {
- ugeth_err
- ("%s: Can not allocate DPRAM memory for p_send_q_mem_reg.",
- __FUNCTION__);
+ if (netif_msg_ifup(ugeth))
+ ugeth_err
+ ("%s: Can not allocate DPRAM memory for p_send_q_mem_reg.",
+ __FUNCTION__);
ucc_geth_memclean(ugeth);
return -ENOMEM;
}
qe_muram_alloc(sizeof(struct ucc_geth_scheduler),
UCC_GETH_SCHEDULER_ALIGNMENT);
if (IS_ERR_VALUE(ugeth->scheduler_offset)) {
- ugeth_err
- ("%s: Can not allocate DPRAM memory for p_scheduler.",
- __FUNCTION__);
+ if (netif_msg_ifup(ugeth))
+ ugeth_err
+ ("%s: Can not allocate DPRAM memory for p_scheduler.",
+ __FUNCTION__);
ucc_geth_memclean(ugeth);
return -ENOMEM;
}
(struct ucc_geth_tx_firmware_statistics_pram),
UCC_GETH_TX_STATISTICS_ALIGNMENT);
if (IS_ERR_VALUE(ugeth->tx_fw_statistics_pram_offset)) {
- ugeth_err
- ("%s: Can not allocate DPRAM memory for"
- " p_tx_fw_statistics_pram.", __FUNCTION__);
+ if (netif_msg_ifup(ugeth))
+ ugeth_err
+ ("%s: Can not allocate DPRAM memory for"
+ " p_tx_fw_statistics_pram.",
+ __FUNCTION__);
ucc_geth_memclean(ugeth);
return -ENOMEM;
}
qe_muram_alloc(sizeof(struct ucc_geth_rx_global_pram),
UCC_GETH_RX_GLOBAL_PRAM_ALIGNMENT);
if (IS_ERR_VALUE(ugeth->rx_glbl_pram_offset)) {
- ugeth_err
- ("%s: Can not allocate DPRAM memory for p_rx_glbl_pram.",
- __FUNCTION__);
+ if (netif_msg_ifup(ugeth))
+ ugeth_err
+ ("%s: Can not allocate DPRAM memory for p_rx_glbl_pram.",
+ __FUNCTION__);
ucc_geth_memclean(ugeth);
return -ENOMEM;
}
sizeof(struct ucc_geth_thread_data_rx),
UCC_GETH_THREAD_DATA_ALIGNMENT);
if (IS_ERR_VALUE(ugeth->thread_dat_rx_offset)) {
- ugeth_err
- ("%s: Can not allocate DPRAM memory for p_thread_data_rx.",
- __FUNCTION__);
+ if (netif_msg_ifup(ugeth))
+ ugeth_err
+ ("%s: Can not allocate DPRAM memory for p_thread_data_rx.",
+ __FUNCTION__);
ucc_geth_memclean(ugeth);
return -ENOMEM;
}
(struct ucc_geth_rx_firmware_statistics_pram),
UCC_GETH_RX_STATISTICS_ALIGNMENT);
if (IS_ERR_VALUE(ugeth->rx_fw_statistics_pram_offset)) {
- ugeth_err
- ("%s: Can not allocate DPRAM memory for"
- " p_rx_fw_statistics_pram.", __FUNCTION__);
+ if (netif_msg_ifup(ugeth))
+ ugeth_err
+ ("%s: Can not allocate DPRAM memory for"
+ " p_rx_fw_statistics_pram.", __FUNCTION__);
ucc_geth_memclean(ugeth);
return -ENOMEM;
}
sizeof(struct ucc_geth_rx_interrupt_coalescing_entry)
+ 4, UCC_GETH_RX_INTERRUPT_COALESCING_ALIGNMENT);
if (IS_ERR_VALUE(ugeth->rx_irq_coalescing_tbl_offset)) {
- ugeth_err
- ("%s: Can not allocate DPRAM memory for"
- " p_rx_irq_coalescing_tbl.", __FUNCTION__);
+ if (netif_msg_ifup(ugeth))
+ ugeth_err
+ ("%s: Can not allocate DPRAM memory for"
+ " p_rx_irq_coalescing_tbl.", __FUNCTION__);
ucc_geth_memclean(ugeth);
return -ENOMEM;
}
sizeof(struct ucc_geth_rx_prefetched_bds)),
UCC_GETH_RX_BD_QUEUES_ALIGNMENT);
if (IS_ERR_VALUE(ugeth->rx_bd_qs_tbl_offset)) {
- ugeth_err
- ("%s: Can not allocate DPRAM memory for p_rx_bd_qs_tbl.",
- __FUNCTION__);
+ if (netif_msg_ifup(ugeth))
+ ugeth_err
+ ("%s: Can not allocate DPRAM memory for p_rx_bd_qs_tbl.",
+ __FUNCTION__);
ucc_geth_memclean(ugeth);
return -ENOMEM;
}
/* initialize extended filtering */
if (ug_info->rxExtendedFiltering) {
if (!ug_info->extendedFilteringChainPointer) {
- ugeth_err("%s: Null Extended Filtering Chain Pointer.",
- __FUNCTION__);
+ if (netif_msg_ifup(ugeth))
+ ugeth_err("%s: Null Extended Filtering Chain Pointer.",
+ __FUNCTION__);
ucc_geth_memclean(ugeth);
return -EINVAL;
}
qe_muram_alloc(sizeof(struct ucc_geth_exf_global_pram),
UCC_GETH_RX_EXTENDED_FILTERING_GLOBAL_PARAMETERS_ALIGNMENT);
if (IS_ERR_VALUE(ugeth->exf_glbl_param_offset)) {
- ugeth_err
- ("%s: Can not allocate DPRAM memory for"
- " p_exf_glbl_param.", __FUNCTION__);
+ if (netif_msg_ifup(ugeth))
+ ugeth_err
+ ("%s: Can not allocate DPRAM memory for"
+ " p_exf_glbl_param.", __FUNCTION__);
ucc_geth_memclean(ugeth);
return -ENOMEM;
}
*/
if (!(ugeth->p_init_enet_param_shadow =
kmalloc(sizeof(struct ucc_geth_init_pram), GFP_KERNEL))) {
- ugeth_err
- ("%s: Can not allocate memory for"
- " p_UccInitEnetParamShadows.", __FUNCTION__);
+ if (netif_msg_ifup(ugeth))
+ ugeth_err
+ ("%s: Can not allocate memory for"
+ " p_UccInitEnetParamShadows.", __FUNCTION__);
ucc_geth_memclean(ugeth);
return -ENOMEM;
}
QE_FLTR_LARGEST_EXTERNAL_TABLE_LOOKUP_KEY_SIZE_8_BYTES)
&& (ug_info->largestexternallookupkeysize !=
QE_FLTR_LARGEST_EXTERNAL_TABLE_LOOKUP_KEY_SIZE_16_BYTES)) {
- ugeth_err("%s: Invalid largest External Lookup Key Size.",
- __FUNCTION__);
+ if (netif_msg_ifup(ugeth))
+ ugeth_err("%s: Invalid largest External Lookup Key Size.",
+ __FUNCTION__);
ucc_geth_memclean(ugeth);
return -EINVAL;
}
/* Rx needs one extra for terminator */
, size, UCC_GETH_THREAD_RX_PRAM_ALIGNMENT,
ug_info->riscRx, 1)) != 0) {
- ugeth_err("%s: Can not fill p_init_enet_param_shadow.",
- __FUNCTION__);
+ if (netif_msg_ifup(ugeth))
+ ugeth_err("%s: Can not fill p_init_enet_param_shadow.",
+ __FUNCTION__);
ucc_geth_memclean(ugeth);
return ret_val;
}
sizeof(struct ucc_geth_thread_tx_pram),
UCC_GETH_THREAD_TX_PRAM_ALIGNMENT,
ug_info->riscTx, 0)) != 0) {
- ugeth_err("%s: Can not fill p_init_enet_param_shadow.",
- __FUNCTION__);
+ if (netif_msg_ifup(ugeth))
+ ugeth_err("%s: Can not fill p_init_enet_param_shadow.",
+ __FUNCTION__);
ucc_geth_memclean(ugeth);
return ret_val;
}
/* Load Rx bds with buffers */
for (i = 0; i < ug_info->numQueuesRx; i++) {
if ((ret_val = rx_bd_buffer_set(ugeth, (u8) i)) != 0) {
- ugeth_err("%s: Can not fill Rx bds with buffers.",
- __FUNCTION__);
+ if (netif_msg_ifup(ugeth))
+ ugeth_err("%s: Can not fill Rx bds with buffers.",
+ __FUNCTION__);
ucc_geth_memclean(ugeth);
return ret_val;
}
/* Allocate InitEnet command parameter structure */
init_enet_pram_offset = qe_muram_alloc(sizeof(struct ucc_geth_init_pram), 4);
if (IS_ERR_VALUE(init_enet_pram_offset)) {
- ugeth_err
- ("%s: Can not allocate DPRAM memory for p_init_enet_pram.",
- __FUNCTION__);
+ if (netif_msg_ifup(ugeth))
+ ugeth_err
+ ("%s: Can not allocate DPRAM memory for p_init_enet_pram.",
+ __FUNCTION__);
ucc_geth_memclean(ugeth);
return -ENOMEM;
}
if (!skb ||
(!(bd_status & (R_F | R_L))) ||
(bd_status & R_ERRORS_FATAL)) {
- ugeth_vdbg("%s, %d: ERROR!!! skb - 0x%08x",
- __FUNCTION__, __LINE__, (u32) skb);
+ if (netif_msg_rx_err(ugeth))
+ ugeth_err("%s, %d: ERROR!!! skb - 0x%08x",
+ __FUNCTION__, __LINE__, (u32) skb);
if (skb)
dev_kfree_skb_any(skb);
skb = get_new_skb(ugeth, bd);
if (!skb) {
- ugeth_warn("%s: No Rx Data Buffer", __FUNCTION__);
+ if (netif_msg_rx_err(ugeth))
+ ugeth_warn("%s: No Rx Data Buffer", __FUNCTION__);
ugeth->stats.rx_dropped++;
break;
}
/* Test station address */
if (dev->dev_addr[0] & ENET_GROUP_ADDR) {
- ugeth_err("%s: Multicast address used for station address"
- " - is this what you wanted?", __FUNCTION__);
+ if (netif_msg_ifup(ugeth))
+ ugeth_err("%s: Multicast address used for station address"
+ " - is this what you wanted?", __FUNCTION__);
return -EINVAL;
}
err = ucc_struct_init(ugeth);
if (err) {
- ugeth_err("%s: Cannot configure internal struct, aborting.", dev->name);
+ if (netif_msg_ifup(ugeth))
+ ugeth_err("%s: Cannot configure internal struct, aborting.", dev->name);
return err;
}
err = ucc_geth_startup(ugeth);
if (err) {
- ugeth_err("%s: Cannot configure net device, aborting.",
- dev->name);
+ if (netif_msg_ifup(ugeth))
+ ugeth_err("%s: Cannot configure net device, aborting.",
+ dev->name);
return err;
}
err = adjust_enet_interface(ugeth);
if (err) {
- ugeth_err("%s: Cannot configure net device, aborting.",
- dev->name);
+ if (netif_msg_ifup(ugeth))
+ ugeth_err("%s: Cannot configure net device, aborting.",
+ dev->name);
return err;
}
err = init_phy(dev);
if (err) {
- ugeth_err("%s: Cannot initialize PHY, aborting.", dev->name);
+ if (netif_msg_ifup(ugeth))
+ ugeth_err("%s: Cannot initialize PHY, aborting.", dev->name);
return err;
}
request_irq(ugeth->ug_info->uf_info.irq, ucc_geth_irq_handler, 0,
"UCC Geth", dev);
if (err) {
- ugeth_err("%s: Cannot get IRQ for net device, aborting.",
- dev->name);
+ if (netif_msg_ifup(ugeth))
+ ugeth_err("%s: Cannot get IRQ for net device, aborting.",
+ dev->name);
ucc_geth_stop(ugeth);
return err;
}
err = ugeth_enable(ugeth, COMM_DIR_RX_AND_TX);
if (err) {
- ugeth_err("%s: Cannot enable net device, aborting.", dev->name);
+ if (netif_msg_ifup(ugeth))
+ ugeth_err("%s: Cannot enable net device, aborting.", dev->name);
ucc_geth_stop(ugeth);
return err;
}
return 0;
}
-const struct ethtool_ops ucc_geth_ethtool_ops = { };
-
static phy_interface_t to_phy_interface(const char *phy_connection_type)
{
if (strcasecmp(phy_connection_type, "mii") == 0)
return -ENODEV;
ug_info = &ugeth_info[ucc_num];
+ if (ug_info == NULL) {
+ if (netif_msg_probe(&debug))
+ ugeth_err("%s: [%d] Missing additional data!",
+ __FUNCTION__, ucc_num);
+ return -ENODEV;
+ }
+
ug_info->uf_info.ucc_num = ucc_num;
prop = of_get_property(np, "rx-clock", NULL);
ug_info->mdio_bus = res.start;
- printk(KERN_INFO "ucc_geth: UCC%1d at 0x%8x (irq = %d) \n",
- ug_info->uf_info.ucc_num + 1, ug_info->uf_info.regs,
- ug_info->uf_info.irq);
-
- if (ug_info == NULL) {
- ugeth_err("%s: [%d] Missing additional data!", __FUNCTION__,
- ucc_num);
- return -ENODEV;
- }
+ if (netif_msg_probe(&debug))
+ printk(KERN_INFO "ucc_geth: UCC%1d at 0x%8x (irq = %d) \n",
+ ug_info->uf_info.ucc_num + 1, ug_info->uf_info.regs,
+ ug_info->uf_info.irq);
/* Create an ethernet device instance */
dev = alloc_etherdev(sizeof(*ugeth));
SET_NETDEV_DEV(dev, device);
/* Fill in the dev structure */
+ uec_set_ethtool_ops(dev);
dev->open = ucc_geth_open;
dev->hard_start_xmit = ucc_geth_start_xmit;
dev->tx_timeout = ucc_geth_timeout;
// dev->change_mtu = ucc_geth_change_mtu;
dev->mtu = 1500;
dev->set_multicast_list = ucc_geth_set_multi;
- dev->ethtool_ops = &ucc_geth_ethtool_ops;
- ugeth->msg_enable = (NETIF_MSG_IFUP << 1 ) - 1;
+ ugeth->msg_enable = netif_msg_init(debug.msg_enable, UGETH_MSG_DEFAULT);
ugeth->phy_interface = phy_interface;
ugeth->max_speed = max_speed;
err = register_netdev(dev);
if (err) {
- ugeth_err("%s: Cannot register net device, aborting.",
- dev->name);
+ if (netif_msg_probe(ugeth))
+ ugeth_err("%s: Cannot register net device, aborting.",
+ dev->name);
free_netdev(dev);
return err;
}
if (ret)
return ret;
- printk(KERN_INFO "ucc_geth: " DRV_DESC "\n");
+ if (netif_msg_drv(&debug))
+ printk(KERN_INFO "ucc_geth: " DRV_DESC "\n");
for (i = 0; i < 8; i++)
memcpy(&(ugeth_info[i]), &ugeth_primary_info,
sizeof(ugeth_primary_info));
#include "ucc_geth_mii.h"
+#define DRV_DESC "QE UCC Gigabit Ethernet Controller"
+#define DRV_NAME "ucc_geth"
+#define DRV_VERSION "1.1"
+
#define NUM_TX_QUEUES 8
#define NUM_RX_QUEUES 8
#define NUM_BDS_IN_PREFETCHED_BDS 4
#define UCC_GETH_TX_VTAG_TABLE_ENTRY_MAX 8
#define UCC_GETH_RX_BD_RING_SIZE_MIN 8
#define UCC_GETH_TX_BD_RING_SIZE_MIN 2
+#define UCC_GETH_BD_RING_SIZE_MAX 0xffff
#define UCC_GETH_SIZE_OF_BD QE_SIZEOF_BD
int bro;
int ecm;
int receiveFlowControl;
+ int transmitFlowControl;
u8 maxGroupAddrInHash;
u8 maxIndAddrInHash;
u8 prel;
--- /dev/null
+/*
+ * Copyright (c) 2007 Freescale Semiconductor, Inc. All rights reserved.
+ *
+ * Description: QE UCC Gigabit Ethernet Ethtool API Set
+ *
+ * Author: Li Yang <leoli@freescale.com>
+ *
+ * Limitation:
+ * Can only get/set setttings of the first queue.
+ * Need to re-open the interface manually after changing some paramters.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/errno.h>
+#include <linux/slab.h>
+#include <linux/stddef.h>
+#include <linux/interrupt.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/skbuff.h>
+#include <linux/spinlock.h>
+#include <linux/mm.h>
+#include <linux/delay.h>
+#include <linux/dma-mapping.h>
+#include <linux/fsl_devices.h>
+#include <linux/ethtool.h>
+#include <linux/mii.h>
+#include <linux/phy.h>
+
+#include <asm/io.h>
+#include <asm/irq.h>
+#include <asm/uaccess.h>
+#include <asm/types.h>
+#include <asm/uaccess.h>
+
+#include "ucc_geth.h"
+#include "ucc_geth_mii.h"
+
+static char hw_stat_gstrings[][ETH_GSTRING_LEN] = {
+ "tx-64-frames",
+ "tx-65-127-frames",
+ "tx-128-255-frames",
+ "rx-64-frames",
+ "rx-65-127-frames",
+ "rx-128-255-frames",
+ "tx-bytes-ok",
+ "tx-pause-frames",
+ "tx-multicast-frames",
+ "tx-broadcast-frames",
+ "rx-frames",
+ "rx-bytes-ok",
+ "rx-bytes-all",
+ "rx-multicast-frames",
+ "rx-broadcast-frames",
+ "stats-counter-carry",
+ "stats-counter-mask",
+ "rx-dropped-frames",
+};
+
+static char tx_fw_stat_gstrings[][ETH_GSTRING_LEN] = {
+ "tx-single-collision",
+ "tx-multiple-collision",
+ "tx-late-collsion",
+ "tx-aborted-frames",
+ "tx-lost-frames",
+ "tx-carrier-sense-errors",
+ "tx-frames-ok",
+ "tx-excessive-differ-frames",
+ "tx-256-511-frames",
+ "tx-1024-1518-frames",
+ "tx-jumbo-frames",
+};
+
+static char rx_fw_stat_gstrings[][ETH_GSTRING_LEN] = {
+ "rx-crc-errors",
+ "rx-alignment-errors",
+ "rx-in-range-length-errors",
+ "rx-out-of-range-length-errors",
+ "rx-too-long-frames",
+ "rx-runt",
+ "rx-very-long-event",
+ "rx-symbol-errors",
+ "rx-busy-drop-frames",
+ "reserved",
+ "reserved",
+ "rx-mismatch-drop-frames",
+ "rx-small-than-64",
+ "rx-256-511-frames",
+ "rx-512-1023-frames",
+ "rx-1024-1518-frames",
+ "rx-jumbo-frames",
+ "rx-mac-error-loss",
+ "rx-pause-frames",
+ "reserved",
+ "rx-vlan-removed",
+ "rx-vlan-replaced",
+ "rx-vlan-inserted",
+ "rx-ip-checksum-errors",
+};
+
+#define UEC_HW_STATS_LEN ARRAY_SIZE(hw_stat_gstrings)
+#define UEC_TX_FW_STATS_LEN ARRAY_SIZE(tx_fw_stat_gstrings)
+#define UEC_RX_FW_STATS_LEN ARRAY_SIZE(rx_fw_stat_gstrings)
+
+extern int init_flow_control_params(u32 automatic_flow_control_mode,
+ int rx_flow_control_enable,
+ int tx_flow_control_enable, u16 pause_period,
+ u16 extension_field, volatile u32 *upsmr_register,
+ volatile u32 *uempr_register, volatile u32 *maccfg1_register);
+
+static int
+uec_get_settings(struct net_device *netdev, struct ethtool_cmd *ecmd)
+{
+ struct ucc_geth_private *ugeth = netdev_priv(netdev);
+ struct phy_device *phydev = ugeth->phydev;
+ struct ucc_geth_info *ug_info = ugeth->ug_info;
+
+ if (!phydev)
+ return -ENODEV;
+
+ ecmd->maxtxpkt = 1;
+ ecmd->maxrxpkt = ug_info->interruptcoalescingmaxvalue[0];
+
+ return phy_ethtool_gset(phydev, ecmd);
+}
+
+static int
+uec_set_settings(struct net_device *netdev, struct ethtool_cmd *ecmd)
+{
+ struct ucc_geth_private *ugeth = netdev_priv(netdev);
+ struct phy_device *phydev = ugeth->phydev;
+
+ if (!phydev)
+ return -ENODEV;
+
+ return phy_ethtool_sset(phydev, ecmd);
+}
+
+static void
+uec_get_pauseparam(struct net_device *netdev,
+ struct ethtool_pauseparam *pause)
+{
+ struct ucc_geth_private *ugeth = netdev_priv(netdev);
+
+ pause->autoneg = ugeth->phydev->autoneg;
+
+ if (ugeth->ug_info->receiveFlowControl)
+ pause->rx_pause = 1;
+ if (ugeth->ug_info->transmitFlowControl)
+ pause->tx_pause = 1;
+}
+
+static int
+uec_set_pauseparam(struct net_device *netdev,
+ struct ethtool_pauseparam *pause)
+{
+ struct ucc_geth_private *ugeth = netdev_priv(netdev);
+ int ret = 0;
+
+ ugeth->ug_info->receiveFlowControl = pause->rx_pause;
+ ugeth->ug_info->transmitFlowControl = pause->tx_pause;
+
+ if (ugeth->phydev->autoneg) {
+ if (netif_running(netdev)) {
+ /* FIXME: automatically restart */
+ printk(KERN_INFO
+ "Please re-open the interface.\n");
+ }
+ } else {
+ struct ucc_geth_info *ug_info = ugeth->ug_info;
+
+ ret = init_flow_control_params(ug_info->aufc,
+ ug_info->receiveFlowControl,
+ ug_info->transmitFlowControl,
+ ug_info->pausePeriod,
+ ug_info->extensionField,
+ &ugeth->uccf->uf_regs->upsmr,
+ &ugeth->ug_regs->uempr,
+ &ugeth->ug_regs->maccfg1);
+ }
+
+ return ret;
+}
+
+static uint32_t
+uec_get_msglevel(struct net_device *netdev)
+{
+ struct ucc_geth_private *ugeth = netdev_priv(netdev);
+ return ugeth->msg_enable;
+}
+
+static void
+uec_set_msglevel(struct net_device *netdev, uint32_t data)
+{
+ struct ucc_geth_private *ugeth = netdev_priv(netdev);
+ ugeth->msg_enable = data;
+}
+
+static int
+uec_get_regs_len(struct net_device *netdev)
+{
+ return sizeof(struct ucc_geth);
+}
+
+static void
+uec_get_regs(struct net_device *netdev,
+ struct ethtool_regs *regs, void *p)
+{
+ int i;
+ struct ucc_geth_private *ugeth = netdev_priv(netdev);
+ u32 __iomem *ug_regs = (u32 __iomem *)ugeth->ug_regs;
+ u32 *buff = p;
+
+ for (i = 0; i < sizeof(struct ucc_geth) / sizeof(u32); i++)
+ buff[i] = in_be32(&ug_regs[i]);
+}
+
+static void
+uec_get_ringparam(struct net_device *netdev,
+ struct ethtool_ringparam *ring)
+{
+ struct ucc_geth_private *ugeth = netdev_priv(netdev);
+ struct ucc_geth_info *ug_info = ugeth->ug_info;
+ int queue = 0;
+
+ ring->rx_max_pending = UCC_GETH_BD_RING_SIZE_MAX;
+ ring->rx_mini_max_pending = UCC_GETH_BD_RING_SIZE_MAX;
+ ring->rx_jumbo_max_pending = UCC_GETH_BD_RING_SIZE_MAX;
+ ring->tx_max_pending = UCC_GETH_BD_RING_SIZE_MAX;
+
+ ring->rx_pending = ug_info->bdRingLenRx[queue];
+ ring->rx_mini_pending = ug_info->bdRingLenRx[queue];
+ ring->rx_jumbo_pending = ug_info->bdRingLenRx[queue];
+ ring->tx_pending = ug_info->bdRingLenTx[queue];
+}
+
+static int
+uec_set_ringparam(struct net_device *netdev,
+ struct ethtool_ringparam *ring)
+{
+ struct ucc_geth_private *ugeth = netdev_priv(netdev);
+ struct ucc_geth_info *ug_info = ugeth->ug_info;
+ int queue = 0, ret = 0;
+
+ if (ring->rx_pending < UCC_GETH_RX_BD_RING_SIZE_MIN) {
+ printk("%s: RxBD ring size must be no smaller than %d.\n",
+ netdev->name, UCC_GETH_RX_BD_RING_SIZE_MIN);
+ return -EINVAL;
+ }
+ if (ring->rx_pending % UCC_GETH_RX_BD_RING_SIZE_ALIGNMENT) {
+ printk("%s: RxBD ring size must be multiple of %d.\n",
+ netdev->name, UCC_GETH_RX_BD_RING_SIZE_ALIGNMENT);
+ return -EINVAL;
+ }
+ if (ring->tx_pending < UCC_GETH_TX_BD_RING_SIZE_MIN) {
+ printk("%s: TxBD ring size must be no smaller than %d.\n",
+ netdev->name, UCC_GETH_TX_BD_RING_SIZE_MIN);
+ return -EINVAL;
+ }
+
+ ug_info->bdRingLenRx[queue] = ring->rx_pending;
+ ug_info->bdRingLenTx[queue] = ring->tx_pending;
+
+ if (netif_running(netdev)) {
+ /* FIXME: restart automatically */
+ printk(KERN_INFO
+ "Please re-open the interface.\n");
+ }
+
+ return ret;
+}
+
+static int uec_get_stats_count(struct net_device *netdev)
+{
+ struct ucc_geth_private *ugeth = netdev_priv(netdev);
+ u32 stats_mode = ugeth->ug_info->statisticsMode;
+ int len = 0;
+
+ if (stats_mode & UCC_GETH_STATISTICS_GATHERING_MODE_HARDWARE)
+ len += UEC_HW_STATS_LEN;
+ if (stats_mode & UCC_GETH_STATISTICS_GATHERING_MODE_FIRMWARE_TX)
+ len += UEC_TX_FW_STATS_LEN;
+ if (stats_mode & UCC_GETH_STATISTICS_GATHERING_MODE_FIRMWARE_RX)
+ len += UEC_RX_FW_STATS_LEN;
+
+ return len;
+}
+
+static void uec_get_strings(struct net_device *netdev, u32 stringset, u8 *buf)
+{
+ struct ucc_geth_private *ugeth = netdev_priv(netdev);
+ u32 stats_mode = ugeth->ug_info->statisticsMode;
+
+ if (stats_mode & UCC_GETH_STATISTICS_GATHERING_MODE_HARDWARE) {
+ memcpy(buf, hw_stat_gstrings, UEC_HW_STATS_LEN *
+ ETH_GSTRING_LEN);
+ buf += UEC_HW_STATS_LEN * ETH_GSTRING_LEN;
+ }
+ if (stats_mode & UCC_GETH_STATISTICS_GATHERING_MODE_FIRMWARE_TX) {
+ memcpy(buf, tx_fw_stat_gstrings, UEC_TX_FW_STATS_LEN *
+ ETH_GSTRING_LEN);
+ buf += UEC_TX_FW_STATS_LEN * ETH_GSTRING_LEN;
+ }
+ if (stats_mode & UCC_GETH_STATISTICS_GATHERING_MODE_FIRMWARE_RX)
+ memcpy(buf, tx_fw_stat_gstrings, UEC_RX_FW_STATS_LEN *
+ ETH_GSTRING_LEN);
+}
+
+static void uec_get_ethtool_stats(struct net_device *netdev,
+ struct ethtool_stats *stats, uint64_t *data)
+{
+ struct ucc_geth_private *ugeth = netdev_priv(netdev);
+ u32 stats_mode = ugeth->ug_info->statisticsMode;
+ u32 __iomem *base;
+ int i, j = 0;
+
+ if (stats_mode & UCC_GETH_STATISTICS_GATHERING_MODE_HARDWARE) {
+ base = (u32 __iomem *)&ugeth->ug_regs->tx64;
+ for (i = 0; i < UEC_HW_STATS_LEN; i++)
+ data[j++] = (u64)in_be32(&base[i]);
+ }
+ if (stats_mode & UCC_GETH_STATISTICS_GATHERING_MODE_FIRMWARE_TX) {
+ base = (u32 __iomem *)ugeth->p_tx_fw_statistics_pram;
+ for (i = 0; i < UEC_TX_FW_STATS_LEN; i++)
+ data[j++] = (u64)in_be32(&base[i]);
+ }
+ if (stats_mode & UCC_GETH_STATISTICS_GATHERING_MODE_FIRMWARE_RX) {
+ base = (u32 __iomem *)ugeth->p_rx_fw_statistics_pram;
+ for (i = 0; i < UEC_RX_FW_STATS_LEN; i++)
+ data[j++] = (u64)in_be32(&base[i]);
+ }
+}
+
+static int uec_nway_reset(struct net_device *netdev)
+{
+ struct ucc_geth_private *ugeth = netdev_priv(netdev);
+
+ return phy_start_aneg(ugeth->phydev);
+}
+
+/* Report driver information */
+static void
+uec_get_drvinfo(struct net_device *netdev,
+ struct ethtool_drvinfo *drvinfo)
+{
+ strncpy(drvinfo->driver, DRV_NAME, 32);
+ strncpy(drvinfo->version, DRV_VERSION, 32);
+ strncpy(drvinfo->fw_version, "N/A", 32);
+ strncpy(drvinfo->bus_info, "QUICC ENGINE", 32);
+ drvinfo->n_stats = uec_get_stats_count(netdev);
+ drvinfo->testinfo_len = 0;
+ drvinfo->eedump_len = 0;
+ drvinfo->regdump_len = uec_get_regs_len(netdev);
+}
+
+static const struct ethtool_ops uec_ethtool_ops = {
+ .get_settings = uec_get_settings,
+ .set_settings = uec_set_settings,
+ .get_drvinfo = uec_get_drvinfo,
+ .get_regs_len = uec_get_regs_len,
+ .get_regs = uec_get_regs,
+ .get_msglevel = uec_get_msglevel,
+ .set_msglevel = uec_set_msglevel,
+ .nway_reset = uec_nway_reset,
+ .get_link = ethtool_op_get_link,
+ .get_ringparam = uec_get_ringparam,
+ .set_ringparam = uec_set_ringparam,
+ .get_pauseparam = uec_get_pauseparam,
+ .set_pauseparam = uec_set_pauseparam,
+ .get_sg = ethtool_op_get_sg,
+ .set_sg = ethtool_op_set_sg,
+ .get_tso = ethtool_op_get_tso,
+ .get_stats_count = uec_get_stats_count,
+ .get_strings = uec_get_strings,
+ .get_ethtool_stats = uec_get_ethtool_stats,
+ .get_perm_addr = ethtool_op_get_perm_addr,
+};
+
+void uec_set_ethtool_ops(struct net_device *netdev)
+{
+ SET_ETHTOOL_OPS(netdev, &uec_ethtool_ops);
+}
#define vdbg(format, arg...) do {} while(0)
#endif
-#define DRV_DESC "QE UCC Ethernet Controller MII Bus"
-#define DRV_NAME "fsl-uec_mdio"
+#define MII_DRV_DESC "QE UCC Ethernet Controller MII Bus"
+#define MII_DRV_NAME "fsl-uec_mdio"
/* Write value to the PHY for this device to the register at regnum, */
/* waiting until the write is done before it returns. All PHY */
};
static struct of_platform_driver uec_mdio_driver = {
- .name = DRV_NAME,
+ .name = MII_DRV_NAME,
.probe = uec_mdio_probe,
.remove = uec_mdio_remove,
.match_table = uec_mdio_match,
* currently we simply return _SxD, if present.
*/
-static int acpi_pci_choose_state(struct pci_dev *pdev, pm_message_t state)
+static pci_power_t acpi_pci_choose_state(struct pci_dev *pdev,
+ pm_message_t state)
{
- /* TBD */
-
- return -ENODEV;
+ int acpi_state;
+
+ acpi_state = acpi_pm_device_sleep_state(&pdev->dev,
+ device_may_wakeup(&pdev->dev), NULL);
+ if (acpi_state < 0)
+ return PCI_POWER_ERROR;
+
+ switch (acpi_state) {
+ case ACPI_STATE_D0:
+ return PCI_D0;
+ case ACPI_STATE_D1:
+ return PCI_D1;
+ case ACPI_STATE_D2:
+ return PCI_D2;
+ case ACPI_STATE_D3:
+ return PCI_D3hot;
+ }
+ return PCI_POWER_ERROR;
}
static int acpi_pci_set_power_state(struct pci_dev *dev, pci_power_t state)
{
acpi_handle handle = DEVICE_ACPI_HANDLE(&dev->dev);
+ acpi_handle tmp;
static int state_conv[] = {
[0] = 0,
[1] = 1,
if (!handle)
return -ENODEV;
+ /* If the ACPI device has _EJ0, ignore the device */
+ if (ACPI_SUCCESS(acpi_get_handle(handle, "_EJ0", &tmp)))
+ return 0;
return acpi_bus_set_power(handle, acpi_state);
}
return 0;
}
-int (*platform_pci_choose_state)(struct pci_dev *dev, pm_message_t state);
+pci_power_t (*platform_pci_choose_state)(struct pci_dev *dev, pm_message_t state);
/**
* pci_choose_state - Choose the power state of a PCI device
pci_power_t pci_choose_state(struct pci_dev *dev, pm_message_t state)
{
- int ret;
+ pci_power_t ret;
if (!pci_find_capability(dev, PCI_CAP_ID_PM))
return PCI_D0;
if (platform_pci_choose_state) {
ret = platform_pci_choose_state(dev, state);
- if (ret >= 0)
- state.event = ret;
+ if (ret != PCI_POWER_ERROR)
+ return ret;
}
switch (state.event) {
device_initcall(pci_init);
EXPORT_SYMBOL_GPL(pci_restore_bars);
+EXPORT_SYMBOL(__pci_reenable_device);
EXPORT_SYMBOL(pci_enable_device_bars);
EXPORT_SYMBOL(pci_enable_device);
EXPORT_SYMBOL(pcim_enable_device);
/* Functions internal to the PCI core code */
-extern int __must_check __pci_reenable_device(struct pci_dev *);
extern int pci_uevent(struct device *dev, char **envp, int num_envp,
char *buffer, int buffer_size);
extern int pci_create_sysfs_dev_files(struct pci_dev *pdev);
resource_size_t, resource_size_t),
void *alignf_data);
/* Firmware callbacks */
-extern int (*platform_pci_choose_state)(struct pci_dev *dev, pm_message_t state);
+extern pci_power_t (*platform_pci_choose_state)(struct pci_dev *dev, pm_message_t state);
extern int (*platform_pci_set_power_state)(struct pci_dev *dev, pci_power_t state);
extern int pci_user_read_config_byte(struct pci_dev *dev, int where, u8 *val);
* card.c - contains functions for managing groups of PnP devices
*
* Copyright 2002 Adam Belay <ambx1@neo.rr.com>
- *
*/
#include <linux/module.h>
LIST_HEAD(pnp_cards);
static LIST_HEAD(pnp_card_drivers);
-
-static const struct pnp_card_device_id * match_card(struct pnp_card_driver * drv, struct pnp_card * card)
+static const struct pnp_card_device_id *match_card(struct pnp_card_driver *drv,
+ struct pnp_card *card)
{
- const struct pnp_card_device_id * drv_id = drv->id_table;
- while (*drv_id->id){
- if (compare_pnp_id(card->id,drv_id->id)) {
+ const struct pnp_card_device_id *drv_id = drv->id_table;
+
+ while (*drv_id->id) {
+ if (compare_pnp_id(card->id, drv_id->id)) {
int i = 0;
+
for (;;) {
int found;
struct pnp_dev *dev;
- if (i == PNP_MAX_DEVICES || ! *drv_id->devs[i].id)
+
+ if (i == PNP_MAX_DEVICES
+ || !*drv_id->devs[i].id)
return drv_id;
found = 0;
card_for_each_dev(card, dev) {
- if (compare_pnp_id(dev->id, drv_id->devs[i].id)) {
+ if (compare_pnp_id
+ (dev->id, drv_id->devs[i].id)) {
found = 1;
break;
}
}
- if (! found)
+ if (!found)
break;
i++;
}
return NULL;
}
-static void card_remove(struct pnp_dev * dev)
+static void card_remove(struct pnp_dev *dev)
{
dev->card_link = NULL;
}
-static void card_remove_first(struct pnp_dev * dev)
+static void card_remove_first(struct pnp_dev *dev)
{
- struct pnp_card_driver * drv = to_pnp_card_driver(dev->driver);
+ struct pnp_card_driver *drv = to_pnp_card_driver(dev->driver);
+
if (!dev->card || !drv)
return;
if (drv->remove)
if (!drv->probe)
return 0;
- id = match_card(drv,card);
+ id = match_card(drv, card);
if (!id)
return 0;
* pnp_add_card_id - adds an EISA id to the specified card
* @id: pointer to a pnp_id structure
* @card: pointer to the desired card
- *
*/
-
-int pnp_add_card_id(struct pnp_id *id, struct pnp_card * card)
+int pnp_add_card_id(struct pnp_id *id, struct pnp_card *card)
{
- struct pnp_id * ptr;
+ struct pnp_id *ptr;
+
if (!id)
return -EINVAL;
if (!card)
return 0;
}
-static void pnp_free_card_ids(struct pnp_card * card)
+static void pnp_free_card_ids(struct pnp_card *card)
{
- struct pnp_id * id;
+ struct pnp_id *id;
struct pnp_id *next;
+
if (!card)
return;
id = card->id;
static void pnp_release_card(struct device *dmdev)
{
- struct pnp_card * card = to_pnp_card(dmdev);
+ struct pnp_card *card = to_pnp_card(dmdev);
+
pnp_free_card_ids(card);
kfree(card);
}
-
-static ssize_t pnp_show_card_name(struct device *dmdev, struct device_attribute *attr, char *buf)
+static ssize_t pnp_show_card_name(struct device *dmdev,
+ struct device_attribute *attr, char *buf)
{
char *str = buf;
struct pnp_card *card = to_pnp_card(dmdev);
- str += sprintf(str,"%s\n", card->name);
+
+ str += sprintf(str, "%s\n", card->name);
return (str - buf);
}
-static DEVICE_ATTR(name,S_IRUGO,pnp_show_card_name,NULL);
+static DEVICE_ATTR(name, S_IRUGO, pnp_show_card_name, NULL);
-static ssize_t pnp_show_card_ids(struct device *dmdev, struct device_attribute *attr, char *buf)
+static ssize_t pnp_show_card_ids(struct device *dmdev,
+ struct device_attribute *attr, char *buf)
{
char *str = buf;
struct pnp_card *card = to_pnp_card(dmdev);
- struct pnp_id * pos = card->id;
+ struct pnp_id *pos = card->id;
while (pos) {
- str += sprintf(str,"%s\n", pos->id);
+ str += sprintf(str, "%s\n", pos->id);
pos = pos->next;
}
return (str - buf);
}
-static DEVICE_ATTR(card_id,S_IRUGO,pnp_show_card_ids,NULL);
+static DEVICE_ATTR(card_id, S_IRUGO, pnp_show_card_ids, NULL);
static int pnp_interface_attach_card(struct pnp_card *card)
{
- int rc = device_create_file(&card->dev,&dev_attr_name);
- if (rc) return rc;
+ int rc = device_create_file(&card->dev, &dev_attr_name);
- rc = device_create_file(&card->dev,&dev_attr_card_id);
- if (rc) goto err_name;
+ if (rc)
+ return rc;
+
+ rc = device_create_file(&card->dev, &dev_attr_card_id);
+ if (rc)
+ goto err_name;
return 0;
-err_name:
- device_remove_file(&card->dev,&dev_attr_name);
+ err_name:
+ device_remove_file(&card->dev, &dev_attr_name);
return rc;
}
* pnp_add_card - adds a PnP card to the PnP Layer
* @card: pointer to the card to add
*/
-
-int pnp_add_card(struct pnp_card * card)
+int pnp_add_card(struct pnp_card *card)
{
int error;
- struct list_head * pos, * temp;
+ struct list_head *pos, *temp;
+
if (!card || !card->protocol)
return -EINVAL;
- sprintf(card->dev.bus_id, "%02x:%02x", card->protocol->number, card->number);
+ sprintf(card->dev.bus_id, "%02x:%02x", card->protocol->number,
+ card->number);
card->dev.parent = &card->protocol->dev;
card->dev.bus = NULL;
card->dev.release = &pnp_release_card;
/* we wait until now to add devices in order to ensure the drivers
* will be able to use all of the related devices on the card
* without waiting any unresonable length of time */
- list_for_each(pos,&card->devices){
+ list_for_each(pos, &card->devices) {
struct pnp_dev *dev = card_to_pnp_dev(pos);
__pnp_add_device(dev);
}
/* match with card drivers */
- list_for_each_safe(pos,temp,&pnp_card_drivers){
- struct pnp_card_driver * drv = list_entry(pos, struct pnp_card_driver, global_list);
- card_probe(card,drv);
+ list_for_each_safe(pos, temp, &pnp_card_drivers) {
+ struct pnp_card_driver *drv =
+ list_entry(pos, struct pnp_card_driver,
+ global_list);
+ card_probe(card, drv);
}
} else
- pnp_err("sysfs failure, card '%s' will be unavailable", card->dev.bus_id);
+ pnp_err("sysfs failure, card '%s' will be unavailable",
+ card->dev.bus_id);
return error;
}
* pnp_remove_card - removes a PnP card from the PnP Layer
* @card: pointer to the card to remove
*/
-
-void pnp_remove_card(struct pnp_card * card)
+void pnp_remove_card(struct pnp_card *card)
{
struct list_head *pos, *temp;
+
if (!card)
return;
device_unregister(&card->dev);
list_del(&card->global_list);
list_del(&card->protocol_list);
spin_unlock(&pnp_lock);
- list_for_each_safe(pos,temp,&card->devices){
+ list_for_each_safe(pos, temp, &card->devices) {
struct pnp_dev *dev = card_to_pnp_dev(pos);
pnp_remove_card_device(dev);
}
* @card: pointer to the card to add to
* @dev: pointer to the device to add
*/
-
-int pnp_add_card_device(struct pnp_card * card, struct pnp_dev * dev)
+int pnp_add_card_device(struct pnp_card *card, struct pnp_dev *dev)
{
if (!card || !dev || !dev->protocol)
return -EINVAL;
dev->dev.parent = &card->dev;
dev->card_link = NULL;
- snprintf(dev->dev.bus_id, BUS_ID_SIZE, "%02x:%02x.%02x", dev->protocol->number,
- card->number,dev->number);
+ snprintf(dev->dev.bus_id, BUS_ID_SIZE, "%02x:%02x.%02x",
+ dev->protocol->number, card->number, dev->number);
spin_lock(&pnp_lock);
dev->card = card;
list_add_tail(&dev->card_list, &card->devices);
* pnp_remove_card_device- removes a device from the specified card
* @dev: pointer to the device to remove
*/
-
-void pnp_remove_card_device(struct pnp_dev * dev)
+void pnp_remove_card_device(struct pnp_dev *dev)
{
spin_lock(&pnp_lock);
dev->card = NULL;
* @id: pointer to a PnP ID structure that explains the rules for finding the device
* @from: Starting place to search from. If NULL it will start from the begining.
*/
-
-struct pnp_dev * pnp_request_card_device(struct pnp_card_link *clink, const char * id, struct pnp_dev * from)
+struct pnp_dev *pnp_request_card_device(struct pnp_card_link *clink,
+ const char *id, struct pnp_dev *from)
{
- struct list_head * pos;
- struct pnp_dev * dev;
- struct pnp_card_driver * drv;
- struct pnp_card * card;
+ struct list_head *pos;
+ struct pnp_dev *dev;
+ struct pnp_card_driver *drv;
+ struct pnp_card *card;
+
if (!clink || !id)
goto done;
card = clink->card;
}
while (pos != &card->devices) {
dev = card_to_pnp_dev(pos);
- if ((!dev->card_link) && compare_pnp_id(dev->id,id))
+ if ((!dev->card_link) && compare_pnp_id(dev->id, id))
goto found;
pos = pos->next;
}
-done:
+ done:
return NULL;
-found:
+ found:
dev->card_link = clink;
dev->dev.driver = &drv->link.driver;
if (pnp_bus_type.probe(&dev->dev))
return dev;
-err_out:
+ err_out:
dev->dev.driver = NULL;
dev->card_link = NULL;
return NULL;
* pnp_release_card_device - call this when the driver no longer needs the device
* @dev: pointer to the PnP device stucture
*/
-
-void pnp_release_card_device(struct pnp_dev * dev)
+void pnp_release_card_device(struct pnp_dev *dev)
{
- struct pnp_card_driver * drv = dev->card_link->driver;
+ struct pnp_card_driver *drv = dev->card_link->driver;
+
if (!drv)
return;
drv->link.remove = &card_remove;
static int card_suspend(struct pnp_dev *dev, pm_message_t state)
{
struct pnp_card_link *link = dev->card_link;
+
if (link->pm_state.event == state.event)
return 0;
link->pm_state = state;
static int card_resume(struct pnp_dev *dev)
{
struct pnp_card_link *link = dev->card_link;
+
if (link->pm_state.event == PM_EVENT_ON)
return 0;
link->pm_state = PMSG_ON;
* pnp_register_card_driver - registers a PnP card driver with the PnP Layer
* @drv: pointer to the driver to register
*/
-
-int pnp_register_card_driver(struct pnp_card_driver * drv)
+int pnp_register_card_driver(struct pnp_card_driver *drv)
{
int error;
struct list_head *pos, *temp;
list_add_tail(&drv->global_list, &pnp_card_drivers);
spin_unlock(&pnp_lock);
- list_for_each_safe(pos,temp,&pnp_cards){
- struct pnp_card *card = list_entry(pos, struct pnp_card, global_list);
- card_probe(card,drv);
+ list_for_each_safe(pos, temp, &pnp_cards) {
+ struct pnp_card *card =
+ list_entry(pos, struct pnp_card, global_list);
+ card_probe(card, drv);
}
return 0;
}
* pnp_unregister_card_driver - unregisters a PnP card driver from the PnP Layer
* @drv: pointer to the driver to unregister
*/
-
-void pnp_unregister_card_driver(struct pnp_card_driver * drv)
+void pnp_unregister_card_driver(struct pnp_card_driver *drv)
{
spin_lock(&pnp_lock);
list_del(&drv->global_list);
pnp_unregister_driver(&drv->link);
}
-#if 0
-EXPORT_SYMBOL(pnp_add_card);
-EXPORT_SYMBOL(pnp_remove_card);
-EXPORT_SYMBOL(pnp_add_card_device);
-EXPORT_SYMBOL(pnp_remove_card_device);
-EXPORT_SYMBOL(pnp_add_card_id);
-#endif /* 0 */
EXPORT_SYMBOL(pnp_request_card_device);
EXPORT_SYMBOL(pnp_release_card_device);
EXPORT_SYMBOL(pnp_register_card_driver);
* core.c - contains all core device and protocol registration functions
*
* Copyright 2002 Adam Belay <ambx1@neo.rr.com>
- *
*/
#include <linux/pnp.h>
#include "base.h"
-
static LIST_HEAD(pnp_protocols);
LIST_HEAD(pnp_global);
DEFINE_SPINLOCK(pnp_lock);
void *result;
result = kzalloc(size, GFP_KERNEL);
- if (!result){
+ if (!result) {
printk(KERN_ERR "pnp: Out of Memory\n");
return NULL;
}
*
* Ex protocols: ISAPNP, PNPBIOS, etc
*/
-
int pnp_register_protocol(struct pnp_protocol *protocol)
{
int nodenum;
- struct list_head * pos;
+ struct list_head *pos;
if (!protocol)
return -EINVAL;
spin_lock(&pnp_lock);
/* assign the lowest unused number */
- list_for_each(pos,&pnp_protocols) {
- struct pnp_protocol * cur = to_pnp_protocol(pos);
- if (cur->number == nodenum){
+ list_for_each(pos, &pnp_protocols) {
+ struct pnp_protocol *cur = to_pnp_protocol(pos);
+ if (cur->number == nodenum) {
pos = &pnp_protocols;
nodenum++;
}
/**
* pnp_protocol_unregister - removes a pnp protocol from the pnp layer
* @protocol: pointer to the corresponding pnp_protocol structure
- *
*/
void pnp_unregister_protocol(struct pnp_protocol *protocol)
{
device_unregister(&protocol->dev);
}
-
static void pnp_free_ids(struct pnp_dev *dev)
{
- struct pnp_id * id;
- struct pnp_id * next;
+ struct pnp_id *id;
+ struct pnp_id *next;
+
if (!dev)
return;
id = dev->id;
static void pnp_release_device(struct device *dmdev)
{
- struct pnp_dev * dev = to_pnp_dev(dmdev);
+ struct pnp_dev *dev = to_pnp_dev(dmdev);
+
pnp_free_option(dev->independent);
pnp_free_option(dev->dependent);
pnp_free_ids(dev);
int __pnp_add_device(struct pnp_dev *dev)
{
int ret;
+
pnp_fixup_device(dev);
dev->dev.bus = &pnp_bus_type;
dev->dev.dma_mask = &dev->dma_mask;
*
* adds to driver model, name database, fixups, interface, etc.
*/
-
int pnp_add_device(struct pnp_dev *dev)
{
if (!dev || !dev->protocol || dev->card)
return -EINVAL;
dev->dev.parent = &dev->protocol->dev;
- sprintf(dev->dev.bus_id, "%02x:%02x", dev->protocol->number, dev->number);
+ sprintf(dev->dev.bus_id, "%02x:%02x", dev->protocol->number,
+ dev->number);
return __pnp_add_device(dev);
}
device_unregister(&dev->dev);
}
-/**
- * pnp_remove_device - removes a pnp device from the pnp layer
- * @dev: pointer to dev to add
- *
- * this function will free all mem used by dev
- */
-#if 0
-void pnp_remove_device(struct pnp_dev *dev)
-{
- if (!dev || dev->card)
- return;
- __pnp_remove_device(dev);
-}
-#endif /* 0 */
-
static int __init pnp_init(void)
{
printk(KERN_INFO "Linux Plug and Play Support v0.97 (c) Adam Belay\n");
}
subsys_initcall(pnp_init);
-
-#if 0
-EXPORT_SYMBOL(pnp_register_protocol);
-EXPORT_SYMBOL(pnp_unregister_protocol);
-EXPORT_SYMBOL(pnp_add_device);
-EXPORT_SYMBOL(pnp_remove_device);
-#endif /* 0 */
* driver.c - device id matching, driver model, etc.
*
* Copyright 2002 Adam Belay <ambx1@neo.rr.com>
- *
*/
#include <linux/string.h>
static int compare_func(const char *ida, const char *idb)
{
int i;
+
/* we only need to compare the last 4 chars */
- for (i=3; i<7; i++)
- {
+ for (i = 3; i < 7; i++) {
if (ida[i] != 'X' &&
- idb[i] != 'X' &&
- toupper(ida[i]) != toupper(idb[i]))
+ idb[i] != 'X' && toupper(ida[i]) != toupper(idb[i]))
return 0;
}
return 1;
{
if (!pos || !id || (strlen(id) != 7))
return 0;
- if (memcmp(id,"ANYDEVS",7)==0)
+ if (memcmp(id, "ANYDEVS", 7) == 0)
return 1;
- while (pos){
- if (memcmp(pos->id,id,3)==0)
- if (compare_func(pos->id,id)==1)
+ while (pos) {
+ if (memcmp(pos->id, id, 3) == 0)
+ if (compare_func(pos->id, id) == 1)
return 1;
pos = pos->next;
}
return 0;
}
-static const struct pnp_device_id * match_device(struct pnp_driver *drv, struct pnp_dev *dev)
+static const struct pnp_device_id *match_device(struct pnp_driver *drv,
+ struct pnp_dev *dev)
{
const struct pnp_device_id *drv_id = drv->id_table;
+
if (!drv_id)
return NULL;
int pnp_device_attach(struct pnp_dev *pnp_dev)
{
spin_lock(&pnp_lock);
- if(pnp_dev->status != PNP_READY){
+ if (pnp_dev->status != PNP_READY) {
spin_unlock(&pnp_lock);
return -EBUSY;
}
pnp_dev = to_pnp_dev(dev);
pnp_drv = to_pnp_driver(dev->driver);
- pnp_dbg("match found with the PnP device '%s' and the driver '%s'", dev->bus_id,pnp_drv->name);
+ pnp_dbg("match found with the PnP device '%s' and the driver '%s'",
+ dev->bus_id, pnp_drv->name);
error = pnp_device_attach(pnp_dev);
if (error < 0)
return error;
}
} else if ((pnp_drv->flags & PNP_DRIVER_RES_DISABLE)
- == PNP_DRIVER_RES_DISABLE) {
+ == PNP_DRIVER_RES_DISABLE) {
error = pnp_disable_dev(pnp_dev);
if (error < 0)
return error;
if (dev_id != NULL)
error = pnp_drv->probe(pnp_dev, dev_id);
}
- if (error >= 0){
+ if (error >= 0) {
pnp_dev->driver = pnp_drv;
error = 0;
} else
goto fail;
return error;
-fail:
+ fail:
pnp_device_detach(pnp_dev);
return error;
}
static int pnp_device_remove(struct device *dev)
{
- struct pnp_dev * pnp_dev = to_pnp_dev(dev);
- struct pnp_driver * drv = pnp_dev->driver;
+ struct pnp_dev *pnp_dev = to_pnp_dev(dev);
+ struct pnp_driver *drv = pnp_dev->driver;
if (drv) {
if (drv->remove)
static int pnp_bus_match(struct device *dev, struct device_driver *drv)
{
- struct pnp_dev * pnp_dev = to_pnp_dev(dev);
- struct pnp_driver * pnp_drv = to_pnp_driver(drv);
+ struct pnp_dev *pnp_dev = to_pnp_dev(dev);
+ struct pnp_driver *pnp_drv = to_pnp_driver(drv);
+
if (match_device(pnp_drv, pnp_dev) == NULL)
return 0;
return 1;
static int pnp_bus_suspend(struct device *dev, pm_message_t state)
{
- struct pnp_dev * pnp_dev = to_pnp_dev(dev);
- struct pnp_driver * pnp_drv = pnp_dev->driver;
+ struct pnp_dev *pnp_dev = to_pnp_dev(dev);
+ struct pnp_driver *pnp_drv = pnp_dev->driver;
int error;
if (!pnp_drv)
if (!(pnp_drv->flags & PNP_DRIVER_RES_DO_NOT_CHANGE) &&
pnp_can_disable(pnp_dev)) {
- error = pnp_stop_dev(pnp_dev);
- if (error)
- return error;
+ error = pnp_stop_dev(pnp_dev);
+ if (error)
+ return error;
}
+ if (pnp_dev->protocol && pnp_dev->protocol->suspend)
+ pnp_dev->protocol->suspend(pnp_dev, state);
return 0;
}
static int pnp_bus_resume(struct device *dev)
{
- struct pnp_dev * pnp_dev = to_pnp_dev(dev);
- struct pnp_driver * pnp_drv = pnp_dev->driver;
+ struct pnp_dev *pnp_dev = to_pnp_dev(dev);
+ struct pnp_driver *pnp_drv = pnp_dev->driver;
int error;
if (!pnp_drv)
return 0;
+ if (pnp_dev->protocol && pnp_dev->protocol->resume)
+ pnp_dev->protocol->resume(pnp_dev);
+
if (!(pnp_drv->flags & PNP_DRIVER_RES_DO_NOT_CHANGE)) {
error = pnp_start_dev(pnp_dev);
if (error)
}
struct bus_type pnp_bus_type = {
- .name = "pnp",
- .match = pnp_bus_match,
- .probe = pnp_device_probe,
- .remove = pnp_device_remove,
+ .name = "pnp",
+ .match = pnp_bus_match,
+ .probe = pnp_device_probe,
+ .remove = pnp_device_remove,
.suspend = pnp_bus_suspend,
- .resume = pnp_bus_resume,
+ .resume = pnp_bus_resume,
};
int pnp_register_driver(struct pnp_driver *drv)
* pnp_add_id - adds an EISA id to the specified device
* @id: pointer to a pnp_id structure
* @dev: pointer to the desired device
- *
*/
-
int pnp_add_id(struct pnp_id *id, struct pnp_dev *dev)
{
struct pnp_id *ptr;
+
if (!id)
return -EINVAL;
if (!dev)
EXPORT_SYMBOL(pnp_register_driver);
EXPORT_SYMBOL(pnp_unregister_driver);
-#if 0
-EXPORT_SYMBOL(pnp_add_id);
-#endif
EXPORT_SYMBOL(pnp_device_attach);
EXPORT_SYMBOL(pnp_device_detach);
*
* Some code, especially possible resource dumping is based on isapnp_proc.c (c) Jaroslav Kysela <perex@suse.cz>
* Copyright 2002 Adam Belay <ambx1@neo.rr.com>
- *
*/
#include <linux/pnp.h>
typedef struct pnp_info_buffer pnp_info_buffer_t;
-static int pnp_printf(pnp_info_buffer_t * buffer, char *fmt,...)
+static int pnp_printf(pnp_info_buffer_t * buffer, char *fmt, ...)
{
va_list args;
int res;
return res;
}
-static void pnp_print_port(pnp_info_buffer_t *buffer, char *space, struct pnp_port *port)
+static void pnp_print_port(pnp_info_buffer_t * buffer, char *space,
+ struct pnp_port *port)
{
- pnp_printf(buffer, "%sport 0x%x-0x%x, align 0x%x, size 0x%x, %i-bit address decoding\n",
- space, port->min, port->max, port->align ? (port->align-1) : 0, port->size,
- port->flags & PNP_PORT_FLAG_16BITADDR ? 16 : 10);
+ pnp_printf(buffer,
+ "%sport 0x%x-0x%x, align 0x%x, size 0x%x, %i-bit address decoding\n",
+ space, port->min, port->max,
+ port->align ? (port->align - 1) : 0, port->size,
+ port->flags & PNP_PORT_FLAG_16BITADDR ? 16 : 10);
}
-static void pnp_print_irq(pnp_info_buffer_t *buffer, char *space, struct pnp_irq *irq)
+static void pnp_print_irq(pnp_info_buffer_t * buffer, char *space,
+ struct pnp_irq *irq)
{
int first = 1, i;
pnp_printf(buffer, "\n");
}
-static void pnp_print_dma(pnp_info_buffer_t *buffer, char *space, struct pnp_dma *dma)
+static void pnp_print_dma(pnp_info_buffer_t * buffer, char *space,
+ struct pnp_dma *dma)
{
int first = 1, i;
char *s;
pnp_printf(buffer, "%sdma ", space);
for (i = 0; i < 8; i++)
- if (dma->map & (1<<i)) {
+ if (dma->map & (1 << i)) {
if (!first) {
pnp_printf(buffer, ",");
} else {
pnp_printf(buffer, " %s\n", s);
}
-static void pnp_print_mem(pnp_info_buffer_t *buffer, char *space, struct pnp_mem *mem)
+static void pnp_print_mem(pnp_info_buffer_t * buffer, char *space,
+ struct pnp_mem *mem)
{
char *s;
pnp_printf(buffer, "%sMemory 0x%x-0x%x, align 0x%x, size 0x%x",
- space, mem->min, mem->max, mem->align, mem->size);
+ space, mem->min, mem->max, mem->align, mem->size);
if (mem->flags & IORESOURCE_MEM_WRITEABLE)
pnp_printf(buffer, ", writeable");
if (mem->flags & IORESOURCE_MEM_CACHEABLE)
pnp_printf(buffer, ", %s\n", s);
}
-static void pnp_print_option(pnp_info_buffer_t *buffer, char *space,
+static void pnp_print_option(pnp_info_buffer_t * buffer, char *space,
struct pnp_option *option, int dep)
{
char *s;
if (dep) {
switch (option->priority) {
- case PNP_RES_PRIORITY_PREFERRED:
+ case PNP_RES_PRIORITY_PREFERRED:
s = "preferred";
break;
- case PNP_RES_PRIORITY_ACCEPTABLE:
+ case PNP_RES_PRIORITY_ACCEPTABLE:
s = "acceptable";
break;
- case PNP_RES_PRIORITY_FUNCTIONAL:
+ case PNP_RES_PRIORITY_FUNCTIONAL:
s = "functional";
break;
- default:
+ default:
s = "invalid";
}
- pnp_printf(buffer, "Dependent: %02i - Priority %s\n",dep, s);
+ pnp_printf(buffer, "Dependent: %02i - Priority %s\n", dep, s);
}
for (port = option->port; port; port = port->next)
pnp_print_mem(buffer, space, mem);
}
-
-static ssize_t pnp_show_options(struct device *dmdev, struct device_attribute *attr, char *buf)
+static ssize_t pnp_show_options(struct device *dmdev,
+ struct device_attribute *attr, char *buf)
{
struct pnp_dev *dev = to_pnp_dev(dmdev);
- struct pnp_option * independent = dev->independent;
- struct pnp_option * dependent = dev->dependent;
+ struct pnp_option *independent = dev->independent;
+ struct pnp_option *dependent = dev->dependent;
int ret, dep = 1;
pnp_info_buffer_t *buffer = (pnp_info_buffer_t *)
- pnp_alloc(sizeof(pnp_info_buffer_t));
+ pnp_alloc(sizeof(pnp_info_buffer_t));
if (!buffer)
return -ENOMEM;
if (independent)
pnp_print_option(buffer, "", independent, 0);
- while (dependent){
+ while (dependent) {
pnp_print_option(buffer, " ", dependent, dep);
dependent = dependent->next;
dep++;
return ret;
}
-static DEVICE_ATTR(options,S_IRUGO,pnp_show_options,NULL);
+static DEVICE_ATTR(options, S_IRUGO, pnp_show_options, NULL);
-
-static ssize_t pnp_show_current_resources(struct device *dmdev, struct device_attribute *attr, char *buf)
+static ssize_t pnp_show_current_resources(struct device *dmdev,
+ struct device_attribute *attr,
+ char *buf)
{
struct pnp_dev *dev = to_pnp_dev(dmdev);
int i, ret;
buffer->buffer = buf;
buffer->curr = buffer->buffer;
- pnp_printf(buffer,"state = ");
+ pnp_printf(buffer, "state = ");
if (dev->active)
- pnp_printf(buffer,"active\n");
+ pnp_printf(buffer, "active\n");
else
- pnp_printf(buffer,"disabled\n");
+ pnp_printf(buffer, "disabled\n");
for (i = 0; i < PNP_MAX_PORT; i++) {
if (pnp_port_valid(dev, i)) {
- pnp_printf(buffer,"io");
+ pnp_printf(buffer, "io");
if (pnp_port_flags(dev, i) & IORESOURCE_DISABLED)
- pnp_printf(buffer," disabled\n");
+ pnp_printf(buffer, " disabled\n");
else
- pnp_printf(buffer," 0x%llx-0x%llx\n",
- (unsigned long long)pnp_port_start(dev, i),
- (unsigned long long)pnp_port_end(dev, i));
+ pnp_printf(buffer, " 0x%llx-0x%llx\n",
+ (unsigned long long)
+ pnp_port_start(dev, i),
+ (unsigned long long)pnp_port_end(dev,
+ i));
}
}
for (i = 0; i < PNP_MAX_MEM; i++) {
if (pnp_mem_valid(dev, i)) {
- pnp_printf(buffer,"mem");
+ pnp_printf(buffer, "mem");
if (pnp_mem_flags(dev, i) & IORESOURCE_DISABLED)
- pnp_printf(buffer," disabled\n");
+ pnp_printf(buffer, " disabled\n");
else
- pnp_printf(buffer," 0x%llx-0x%llx\n",
- (unsigned long long)pnp_mem_start(dev, i),
- (unsigned long long)pnp_mem_end(dev, i));
+ pnp_printf(buffer, " 0x%llx-0x%llx\n",
+ (unsigned long long)
+ pnp_mem_start(dev, i),
+ (unsigned long long)pnp_mem_end(dev,
+ i));
}
}
for (i = 0; i < PNP_MAX_IRQ; i++) {
if (pnp_irq_valid(dev, i)) {
- pnp_printf(buffer,"irq");
+ pnp_printf(buffer, "irq");
if (pnp_irq_flags(dev, i) & IORESOURCE_DISABLED)
- pnp_printf(buffer," disabled\n");
+ pnp_printf(buffer, " disabled\n");
else
- pnp_printf(buffer," %lld\n",
- (unsigned long long)pnp_irq(dev, i));
+ pnp_printf(buffer, " %lld\n",
+ (unsigned long long)pnp_irq(dev, i));
}
}
for (i = 0; i < PNP_MAX_DMA; i++) {
if (pnp_dma_valid(dev, i)) {
- pnp_printf(buffer,"dma");
+ pnp_printf(buffer, "dma");
if (pnp_dma_flags(dev, i) & IORESOURCE_DISABLED)
- pnp_printf(buffer," disabled\n");
+ pnp_printf(buffer, " disabled\n");
else
- pnp_printf(buffer," %lld\n",
- (unsigned long long)pnp_dma(dev, i));
+ pnp_printf(buffer, " %lld\n",
+ (unsigned long long)pnp_dma(dev, i));
}
}
ret = (buffer->curr - buf);
extern struct semaphore pnp_res_mutex;
static ssize_t
-pnp_set_current_resources(struct device * dmdev, struct device_attribute *attr, const char * ubuf, size_t count)
+pnp_set_current_resources(struct device *dmdev, struct device_attribute *attr,
+ const char *ubuf, size_t count)
{
struct pnp_dev *dev = to_pnp_dev(dmdev);
- char *buf = (void *)ubuf;
- int retval = 0;
+ char *buf = (void *)ubuf;
+ int retval = 0;
if (dev->status & PNP_ATTACHED) {
retval = -EBUSY;
- pnp_info("Device %s cannot be configured because it is in use.", dev->dev.bus_id);
+ pnp_info("Device %s cannot be configured because it is in use.",
+ dev->dev.bus_id);
goto done;
}
while (isspace(*buf))
++buf;
- if (!strnicmp(buf,"disable",7)) {
+ if (!strnicmp(buf, "disable", 7)) {
retval = pnp_disable_dev(dev);
goto done;
}
- if (!strnicmp(buf,"activate",8)) {
+ if (!strnicmp(buf, "activate", 8)) {
retval = pnp_activate_dev(dev);
goto done;
}
- if (!strnicmp(buf,"fill",4)) {
+ if (!strnicmp(buf, "fill", 4)) {
if (dev->active)
goto done;
retval = pnp_auto_config_dev(dev);
goto done;
}
- if (!strnicmp(buf,"auto",4)) {
+ if (!strnicmp(buf, "auto", 4)) {
if (dev->active)
goto done;
pnp_init_resource_table(&dev->res);
retval = pnp_auto_config_dev(dev);
goto done;
}
- if (!strnicmp(buf,"clear",5)) {
+ if (!strnicmp(buf, "clear", 5)) {
if (dev->active)
goto done;
pnp_init_resource_table(&dev->res);
goto done;
}
- if (!strnicmp(buf,"get",3)) {
+ if (!strnicmp(buf, "get", 3)) {
down(&pnp_res_mutex);
if (pnp_can_read(dev))
dev->protocol->get(dev, &dev->res);
up(&pnp_res_mutex);
goto done;
}
- if (!strnicmp(buf,"set",3)) {
+ if (!strnicmp(buf, "set", 3)) {
int nport = 0, nmem = 0, nirq = 0, ndma = 0;
if (dev->active)
goto done;
while (1) {
while (isspace(*buf))
++buf;
- if (!strnicmp(buf,"io",2)) {
+ if (!strnicmp(buf, "io", 2)) {
buf += 2;
while (isspace(*buf))
++buf;
- dev->res.port_resource[nport].start = simple_strtoul(buf,&buf,0);
+ dev->res.port_resource[nport].start =
+ simple_strtoul(buf, &buf, 0);
while (isspace(*buf))
++buf;
- if(*buf == '-') {
+ if (*buf == '-') {
buf += 1;
while (isspace(*buf))
++buf;
- dev->res.port_resource[nport].end = simple_strtoul(buf,&buf,0);
+ dev->res.port_resource[nport].end =
+ simple_strtoul(buf, &buf, 0);
} else
- dev->res.port_resource[nport].end = dev->res.port_resource[nport].start;
- dev->res.port_resource[nport].flags = IORESOURCE_IO;
+ dev->res.port_resource[nport].end =
+ dev->res.port_resource[nport].start;
+ dev->res.port_resource[nport].flags =
+ IORESOURCE_IO;
nport++;
if (nport >= PNP_MAX_PORT)
break;
continue;
}
- if (!strnicmp(buf,"mem",3)) {
+ if (!strnicmp(buf, "mem", 3)) {
buf += 3;
while (isspace(*buf))
++buf;
- dev->res.mem_resource[nmem].start = simple_strtoul(buf,&buf,0);
+ dev->res.mem_resource[nmem].start =
+ simple_strtoul(buf, &buf, 0);
while (isspace(*buf))
++buf;
- if(*buf == '-') {
+ if (*buf == '-') {
buf += 1;
while (isspace(*buf))
++buf;
- dev->res.mem_resource[nmem].end = simple_strtoul(buf,&buf,0);
+ dev->res.mem_resource[nmem].end =
+ simple_strtoul(buf, &buf, 0);
} else
- dev->res.mem_resource[nmem].end = dev->res.mem_resource[nmem].start;
- dev->res.mem_resource[nmem].flags = IORESOURCE_MEM;
+ dev->res.mem_resource[nmem].end =
+ dev->res.mem_resource[nmem].start;
+ dev->res.mem_resource[nmem].flags =
+ IORESOURCE_MEM;
nmem++;
if (nmem >= PNP_MAX_MEM)
break;
continue;
}
- if (!strnicmp(buf,"irq",3)) {
+ if (!strnicmp(buf, "irq", 3)) {
buf += 3;
while (isspace(*buf))
++buf;
dev->res.irq_resource[nirq].start =
- dev->res.irq_resource[nirq].end = simple_strtoul(buf,&buf,0);
- dev->res.irq_resource[nirq].flags = IORESOURCE_IRQ;
+ dev->res.irq_resource[nirq].end =
+ simple_strtoul(buf, &buf, 0);
+ dev->res.irq_resource[nirq].flags =
+ IORESOURCE_IRQ;
nirq++;
if (nirq >= PNP_MAX_IRQ)
break;
continue;
}
- if (!strnicmp(buf,"dma",3)) {
+ if (!strnicmp(buf, "dma", 3)) {
buf += 3;
while (isspace(*buf))
++buf;
dev->res.dma_resource[ndma].start =
- dev->res.dma_resource[ndma].end = simple_strtoul(buf,&buf,0);
- dev->res.dma_resource[ndma].flags = IORESOURCE_DMA;
+ dev->res.dma_resource[ndma].end =
+ simple_strtoul(buf, &buf, 0);
+ dev->res.dma_resource[ndma].flags =
+ IORESOURCE_DMA;
ndma++;
if (ndma >= PNP_MAX_DMA)
break;
up(&pnp_res_mutex);
goto done;
}
- done:
+ done:
if (retval < 0)
return retval;
return count;
}
-static DEVICE_ATTR(resources,S_IRUGO | S_IWUSR,
- pnp_show_current_resources,pnp_set_current_resources);
+static DEVICE_ATTR(resources, S_IRUGO | S_IWUSR,
+ pnp_show_current_resources, pnp_set_current_resources);
-static ssize_t pnp_show_current_ids(struct device *dmdev, struct device_attribute *attr, char *buf)
+static ssize_t pnp_show_current_ids(struct device *dmdev,
+ struct device_attribute *attr, char *buf)
{
char *str = buf;
struct pnp_dev *dev = to_pnp_dev(dmdev);
- struct pnp_id * pos = dev->id;
+ struct pnp_id *pos = dev->id;
while (pos) {
- str += sprintf(str,"%s\n", pos->id);
+ str += sprintf(str, "%s\n", pos->id);
pos = pos->next;
}
return (str - buf);
}
-static DEVICE_ATTR(id,S_IRUGO,pnp_show_current_ids,NULL);
+static DEVICE_ATTR(id, S_IRUGO, pnp_show_current_ids, NULL);
int pnp_interface_attach_device(struct pnp_dev *dev)
{
- int rc = device_create_file(&dev->dev,&dev_attr_options);
- if (rc) goto err;
- rc = device_create_file(&dev->dev,&dev_attr_resources);
- if (rc) goto err_opt;
- rc = device_create_file(&dev->dev,&dev_attr_id);
- if (rc) goto err_res;
+ int rc = device_create_file(&dev->dev, &dev_attr_options);
+
+ if (rc)
+ goto err;
+ rc = device_create_file(&dev->dev, &dev_attr_resources);
+ if (rc)
+ goto err_opt;
+ rc = device_create_file(&dev->dev, &dev_attr_id);
+ if (rc)
+ goto err_res;
return 0;
-err_res:
- device_remove_file(&dev->dev,&dev_attr_resources);
-err_opt:
- device_remove_file(&dev->dev,&dev_attr_options);
-err:
+ err_res:
+ device_remove_file(&dev->dev, &dev_attr_resources);
+ err_opt:
+ device_remove_file(&dev->dev, &dev_attr_options);
+ err:
return rc;
}
* the old isapnp APIs. If possible use the new APIs instead.
*
* Copyright 2002 Adam Belay <ambx1@neo.rr.com>
- *
*/
-
-/* TODO: see if more isapnp functions are needed here */
#include <linux/module.h>
#include <linux/isapnp.h>
#include <linux/string.h>
-static void pnp_convert_id(char *buf, unsigned short vendor, unsigned short device)
+static void pnp_convert_id(char *buf, unsigned short vendor,
+ unsigned short device)
{
sprintf(buf, "%c%c%c%x%x%x%x",
- 'A' + ((vendor >> 2) & 0x3f) - 1,
- 'A' + (((vendor & 3) << 3) | ((vendor >> 13) & 7)) - 1,
- 'A' + ((vendor >> 8) & 0x1f) - 1,
- (device >> 4) & 0x0f,
- device & 0x0f,
- (device >> 12) & 0x0f,
- (device >> 8) & 0x0f);
+ 'A' + ((vendor >> 2) & 0x3f) - 1,
+ 'A' + (((vendor & 3) << 3) | ((vendor >> 13) & 7)) - 1,
+ 'A' + ((vendor >> 8) & 0x1f) - 1,
+ (device >> 4) & 0x0f, device & 0x0f,
+ (device >> 12) & 0x0f, (device >> 8) & 0x0f);
}
-struct pnp_card *pnp_find_card(unsigned short vendor,
- unsigned short device,
+struct pnp_card *pnp_find_card(unsigned short vendor, unsigned short device,
struct pnp_card *from)
{
char id[8];
char any[8];
struct list_head *list;
+
pnp_convert_id(id, vendor, device);
pnp_convert_id(any, ISAPNP_ANY_ID, ISAPNP_ANY_ID);
while (list != &pnp_cards) {
struct pnp_card *card = global_to_pnp_card(list);
- if (compare_pnp_id(card->id,id) || (memcmp(id,any,7)==0))
+
+ if (compare_pnp_id(card->id, id) || (memcmp(id, any, 7) == 0))
return card;
list = list->next;
}
return NULL;
}
-struct pnp_dev *pnp_find_dev(struct pnp_card *card,
- unsigned short vendor,
- unsigned short function,
- struct pnp_dev *from)
+struct pnp_dev *pnp_find_dev(struct pnp_card *card, unsigned short vendor,
+ unsigned short function, struct pnp_dev *from)
{
char id[8];
char any[8];
+
pnp_convert_id(id, vendor, function);
pnp_convert_id(any, ISAPNP_ANY_ID, ISAPNP_ANY_ID);
if (card == NULL) { /* look for a logical device from all cards */
while (list != &pnp_global) {
struct pnp_dev *dev = global_to_pnp_dev(list);
- if (compare_pnp_id(dev->id,id) || (memcmp(id,any,7)==0))
+
+ if (compare_pnp_id(dev->id, id) ||
+ (memcmp(id, any, 7) == 0))
return dev;
list = list->next;
}
}
while (list != &card->devices) {
struct pnp_dev *dev = card_to_pnp_dev(list);
- if (compare_pnp_id(dev->id,id))
+
+ if (compare_pnp_id(dev->id, id))
return dev;
list = list->next;
}
#define ISAPNP_DEBUG
#endif
-int isapnp_disable; /* Disable ISA PnP */
-static int isapnp_rdp; /* Read Data Port */
-static int isapnp_reset = 1; /* reset all PnP cards (deactivate) */
-static int isapnp_verbose = 1; /* verbose mode */
+int isapnp_disable; /* Disable ISA PnP */
+static int isapnp_rdp; /* Read Data Port */
+static int isapnp_reset = 1; /* reset all PnP cards (deactivate) */
+static int isapnp_verbose = 1; /* verbose mode */
MODULE_AUTHOR("Jaroslav Kysela <perex@suse.cz>");
MODULE_DESCRIPTION("Generic ISA Plug & Play support");
unsigned short val;
val = isapnp_read_byte(idx);
- val = (val << 8) + isapnp_read_byte(idx+1);
+ val = (val << 8) + isapnp_read_byte(idx + 1);
return val;
}
static void isapnp_write_word(unsigned char idx, unsigned short val)
{
isapnp_write_byte(idx, val >> 8);
- isapnp_write_byte(idx+1, val);
+ isapnp_write_byte(idx + 1, val);
}
static void isapnp_key(void)
static void __init isapnp_peek(unsigned char *data, int bytes)
{
int i, j;
- unsigned char d=0;
+ unsigned char d = 0;
for (i = 1; i <= bytes; i++) {
for (j = 0; j < 20; j++) {
{
int rdp = isapnp_rdp;
static int old_rdp = 0;
-
- if(old_rdp)
- {
+
+ if (old_rdp) {
release_region(old_rdp, 1);
old_rdp = 0;
}
while (rdp <= 0x3ff) {
/*
- * We cannot use NE2000 probe spaces for ISAPnP or we
- * will lock up machines.
+ * We cannot use NE2000 probe spaces for ISAPnP or we
+ * will lock up machines.
*/
- if ((rdp < 0x280 || rdp > 0x380) && request_region(rdp, 1, "ISAPnP"))
- {
+ if ((rdp < 0x280 || rdp > 0x380)
+ && request_region(rdp, 1, "ISAPnP")) {
isapnp_rdp = rdp;
old_rdp = rdp;
return 0;
* Perform an isolation. The port selection code now tries to avoid
* "dangerous to read" ports.
*/
-
static int __init isapnp_isolate_rdp_select(void)
{
isapnp_wait();
/*
* Isolate (assign uniqued CSN) to all ISA PnP devices.
*/
-
static int __init isapnp_isolate(void)
{
unsigned char checksum = 0x6a;
udelay(250);
if (data == 0x55aa)
bit = 0x01;
- checksum = ((((checksum ^ (checksum >> 1)) & 0x01) ^ bit) << 7) | (checksum >> 1);
+ checksum =
+ ((((checksum ^ (checksum >> 1)) & 0x01) ^ bit) << 7)
+ | (checksum >> 1);
bit = 0x00;
}
for (i = 65; i <= 72; i++) {
/*
* Read one tag from stream.
*/
-
static int __init isapnp_read_tag(unsigned char *type, unsigned short *size)
{
unsigned char tag, tmp[2];
isapnp_peek(&tag, 1);
- if (tag == 0) /* invalid tag */
+ if (tag == 0) /* invalid tag */
return -1;
if (tag & 0x80) { /* large item */
*type = tag;
*size = tag & 0x07;
}
#if 0
- printk(KERN_DEBUG "tag = 0x%x, type = 0x%x, size = %i\n", tag, *type, *size);
+ printk(KERN_DEBUG "tag = 0x%x, type = 0x%x, size = %i\n", tag, *type,
+ *size);
#endif
if (*type == 0xff && *size == 0xffff) /* probably invalid data */
return -1;
/*
* Skip specified number of bytes from stream.
*/
-
static void __init isapnp_skip_bytes(int count)
{
isapnp_peek(NULL, count);
/*
* Parse EISA id.
*/
-
-static void isapnp_parse_id(struct pnp_dev * dev, unsigned short vendor, unsigned short device)
+static void isapnp_parse_id(struct pnp_dev *dev, unsigned short vendor,
+ unsigned short device)
{
- struct pnp_id * id;
+ struct pnp_id *id;
+
if (!dev)
return;
id = kzalloc(sizeof(struct pnp_id), GFP_KERNEL);
if (!id)
return;
sprintf(id->id, "%c%c%c%x%x%x%x",
- 'A' + ((vendor >> 2) & 0x3f) - 1,
- 'A' + (((vendor & 3) << 3) | ((vendor >> 13) & 7)) - 1,
- 'A' + ((vendor >> 8) & 0x1f) - 1,
- (device >> 4) & 0x0f,
- device & 0x0f,
- (device >> 12) & 0x0f,
- (device >> 8) & 0x0f);
+ 'A' + ((vendor >> 2) & 0x3f) - 1,
+ 'A' + (((vendor & 3) << 3) | ((vendor >> 13) & 7)) - 1,
+ 'A' + ((vendor >> 8) & 0x1f) - 1,
+ (device >> 4) & 0x0f,
+ device & 0x0f, (device >> 12) & 0x0f, (device >> 8) & 0x0f);
pnp_add_id(id, dev);
}
/*
* Parse logical device tag.
*/
-
-static struct pnp_dev * __init isapnp_parse_device(struct pnp_card *card, int size, int number)
+static struct pnp_dev *__init isapnp_parse_device(struct pnp_card *card,
+ int size, int number)
{
unsigned char tmp[6];
struct pnp_dev *dev;
return dev;
}
-
/*
* Add IRQ resource to resources list.
*/
-
static void __init isapnp_parse_irq_resource(struct pnp_option *option,
- int size)
+ int size)
{
unsigned char tmp[3];
struct pnp_irq *irq;
else
irq->flags = IORESOURCE_IRQ_HIGHEDGE;
pnp_register_irq_resource(option, irq);
- return;
}
/*
* Add DMA resource to resources list.
*/
-
static void __init isapnp_parse_dma_resource(struct pnp_option *option,
- int size)
+ int size)
{
unsigned char tmp[2];
struct pnp_dma *dma;
dma->map = tmp[0];
dma->flags = tmp[1];
pnp_register_dma_resource(option, dma);
- return;
}
/*
* Add port resource to resources list.
*/
-
static void __init isapnp_parse_port_resource(struct pnp_option *option,
- int size)
+ int size)
{
unsigned char tmp[7];
struct pnp_port *port;
port->align = tmp[5];
port->size = tmp[6];
port->flags = tmp[0] ? PNP_PORT_FLAG_16BITADDR : 0;
- pnp_register_port_resource(option,port);
- return;
+ pnp_register_port_resource(option, port);
}
/*
* Add fixed port resource to resources list.
*/
-
static void __init isapnp_parse_fixed_port_resource(struct pnp_option *option,
- int size)
+ int size)
{
unsigned char tmp[3];
struct pnp_port *port;
port->size = tmp[2];
port->align = 0;
port->flags = PNP_PORT_FLAG_FIXED;
- pnp_register_port_resource(option,port);
- return;
+ pnp_register_port_resource(option, port);
}
/*
* Add memory resource to resources list.
*/
-
static void __init isapnp_parse_mem_resource(struct pnp_option *option,
- int size)
+ int size)
{
unsigned char tmp[9];
struct pnp_mem *mem;
mem->align = (tmp[6] << 8) | tmp[5];
mem->size = ((tmp[8] << 8) | tmp[7]) << 8;
mem->flags = tmp[0];
- pnp_register_mem_resource(option,mem);
- return;
+ pnp_register_mem_resource(option, mem);
}
/*
* Add 32-bit memory resource to resources list.
*/
-
static void __init isapnp_parse_mem32_resource(struct pnp_option *option,
- int size)
+ int size)
{
unsigned char tmp[17];
struct pnp_mem *mem;
return;
mem->min = (tmp[4] << 24) | (tmp[3] << 16) | (tmp[2] << 8) | tmp[1];
mem->max = (tmp[8] << 24) | (tmp[7] << 16) | (tmp[6] << 8) | tmp[5];
- mem->align = (tmp[12] << 24) | (tmp[11] << 16) | (tmp[10] << 8) | tmp[9];
- mem->size = (tmp[16] << 24) | (tmp[15] << 16) | (tmp[14] << 8) | tmp[13];
+ mem->align =
+ (tmp[12] << 24) | (tmp[11] << 16) | (tmp[10] << 8) | tmp[9];
+ mem->size =
+ (tmp[16] << 24) | (tmp[15] << 16) | (tmp[14] << 8) | tmp[13];
mem->flags = tmp[0];
- pnp_register_mem_resource(option,mem);
+ pnp_register_mem_resource(option, mem);
}
/*
* Add 32-bit fixed memory resource to resources list.
*/
-
static void __init isapnp_parse_fixed_mem32_resource(struct pnp_option *option,
- int size)
+ int size)
{
unsigned char tmp[9];
struct pnp_mem *mem;
mem = kzalloc(sizeof(struct pnp_mem), GFP_KERNEL);
if (!mem)
return;
- mem->min = mem->max = (tmp[4] << 24) | (tmp[3] << 16) | (tmp[2] << 8) | tmp[1];
+ mem->min = mem->max =
+ (tmp[4] << 24) | (tmp[3] << 16) | (tmp[2] << 8) | tmp[1];
mem->size = (tmp[8] << 24) | (tmp[7] << 16) | (tmp[6] << 8) | tmp[5];
mem->align = 0;
mem->flags = tmp[0];
- pnp_register_mem_resource(option,mem);
+ pnp_register_mem_resource(option, mem);
}
/*
* Parse card name for ISA PnP device.
- */
-
+ */
static void __init
isapnp_parse_name(char *name, unsigned int name_max, unsigned short *size)
{
if (name[0] == '\0') {
- unsigned short size1 = *size >= name_max ? (name_max - 1) : *size;
+ unsigned short size1 =
+ *size >= name_max ? (name_max - 1) : *size;
isapnp_peek(name, size1);
name[size1] = '\0';
*size -= size1;
/* clean whitespace from end of string */
- while (size1 > 0 && name[--size1] == ' ')
+ while (size1 > 0 && name[--size1] == ' ')
name[size1] = '\0';
}
}
/*
* Parse resource map for logical device.
*/
-
static int __init isapnp_create_device(struct pnp_card *card,
unsigned short size)
{
unsigned char type, tmp[17];
struct pnp_option *option;
struct pnp_dev *dev;
+
if ((dev = isapnp_parse_device(card, size, number++)) == NULL)
return 1;
option = pnp_register_independent_option(dev);
kfree(dev);
return 1;
}
- pnp_add_card_device(card,dev);
+ pnp_add_card_device(card, dev);
while (1) {
- if (isapnp_read_tag(&type, &size)<0)
+ if (isapnp_read_tag(&type, &size) < 0)
return 1;
if (skip && type != _STAG_LOGDEVID && type != _STAG_END)
goto __skip;
switch (type) {
case _STAG_LOGDEVID:
if (size >= 5 && size <= 6) {
- if ((dev = isapnp_parse_device(card, size, number++)) == NULL)
+ if ((dev =
+ isapnp_parse_device(card, size,
+ number++)) == NULL)
return 1;
size = 0;
skip = 0;
kfree(dev);
return 1;
}
- pnp_add_card_device(card,dev);
+ pnp_add_card_device(card, dev);
} else {
skip = 1;
}
case _STAG_COMPATDEVID:
if (size == 4 && compat < DEVICE_COUNT_COMPATIBLE) {
isapnp_peek(tmp, 4);
- isapnp_parse_id(dev,(tmp[1] << 8) | tmp[0], (tmp[3] << 8) | tmp[2]);
+ isapnp_parse_id(dev, (tmp[1] << 8) | tmp[0],
+ (tmp[3] << 8) | tmp[2]);
compat++;
size = 0;
}
priority = 0x100 | tmp[0];
size = 0;
}
- option = pnp_register_dependent_option(dev,priority);
+ option = pnp_register_dependent_option(dev, priority);
if (!option)
return 1;
break;
isapnp_skip_bytes(size);
return 1;
default:
- printk(KERN_ERR "isapnp: unexpected or unknown tag type 0x%x for logical device %i (device %i), ignored\n", type, dev->number, card->number);
+ printk(KERN_ERR
+ "isapnp: unexpected or unknown tag type 0x%x for logical device %i (device %i), ignored\n",
+ type, dev->number, card->number);
}
__skip:
- if (size > 0)
- isapnp_skip_bytes(size);
+ if (size > 0)
+ isapnp_skip_bytes(size);
}
return 0;
}
/*
* Parse resource map for ISA PnP card.
*/
-
static void __init isapnp_parse_resource_map(struct pnp_card *card)
{
unsigned char type, tmp[17];
unsigned short size;
while (1) {
- if (isapnp_read_tag(&type, &size)<0)
+ if (isapnp_read_tag(&type, &size) < 0)
return;
switch (type) {
case _STAG_PNPVERNO:
break;
case _STAG_LOGDEVID:
if (size >= 5 && size <= 6) {
- if (isapnp_create_device(card, size)==1)
+ if (isapnp_create_device(card, size) == 1)
return;
size = 0;
}
case _STAG_VENDOR:
break;
case _LTAG_ANSISTR:
- isapnp_parse_name(card->name, sizeof(card->name), &size);
+ isapnp_parse_name(card->name, sizeof(card->name),
+ &size);
break;
case _LTAG_UNICODESTR:
/* silently ignore */
isapnp_skip_bytes(size);
return;
default:
- printk(KERN_ERR "isapnp: unexpected or unknown tag type 0x%x for device %i, ignored\n", type, card->number);
+ printk(KERN_ERR
+ "isapnp: unexpected or unknown tag type 0x%x for device %i, ignored\n",
+ type, card->number);
}
__skip:
- if (size > 0)
- isapnp_skip_bytes(size);
+ if (size > 0)
+ isapnp_skip_bytes(size);
}
}
/*
* Compute ISA PnP checksum for first eight bytes.
*/
-
static unsigned char __init isapnp_checksum(unsigned char *data)
{
int i, j;
bit = 0;
if (b & (1 << j))
bit = 1;
- checksum = ((((checksum ^ (checksum >> 1)) & 0x01) ^ bit) << 7) | (checksum >> 1);
+ checksum =
+ ((((checksum ^ (checksum >> 1)) & 0x01) ^ bit) << 7)
+ | (checksum >> 1);
}
}
return checksum;
/*
* Parse EISA id for ISA PnP card.
*/
-
-static void isapnp_parse_card_id(struct pnp_card * card, unsigned short vendor, unsigned short device)
+static void isapnp_parse_card_id(struct pnp_card *card, unsigned short vendor,
+ unsigned short device)
{
- struct pnp_id * id = kzalloc(sizeof(struct pnp_id), GFP_KERNEL);
+ struct pnp_id *id = kzalloc(sizeof(struct pnp_id), GFP_KERNEL);
+
if (!id)
return;
sprintf(id->id, "%c%c%c%x%x%x%x",
- 'A' + ((vendor >> 2) & 0x3f) - 1,
- 'A' + (((vendor & 3) << 3) | ((vendor >> 13) & 7)) - 1,
- 'A' + ((vendor >> 8) & 0x1f) - 1,
- (device >> 4) & 0x0f,
- device & 0x0f,
- (device >> 12) & 0x0f,
- (device >> 8) & 0x0f);
- pnp_add_card_id(id,card);
+ 'A' + ((vendor >> 2) & 0x3f) - 1,
+ 'A' + (((vendor & 3) << 3) | ((vendor >> 13) & 7)) - 1,
+ 'A' + ((vendor >> 8) & 0x1f) - 1,
+ (device >> 4) & 0x0f,
+ device & 0x0f, (device >> 12) & 0x0f, (device >> 8) & 0x0f);
+ pnp_add_card_id(id, card);
}
/*
* Build device list for all present ISA PnP devices.
*/
-
static int __init isapnp_build_device_list(void)
{
int csn;
isapnp_peek(header, 9);
checksum = isapnp_checksum(header);
#if 0
- printk(KERN_DEBUG "vendor: %02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x\n",
- header[0], header[1], header[2], header[3],
- header[4], header[5], header[6], header[7], header[8]);
+ printk(KERN_DEBUG
+ "vendor: %02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x\n",
+ header[0], header[1], header[2], header[3], header[4],
+ header[5], header[6], header[7], header[8]);
printk(KERN_DEBUG "checksum = 0x%x\n", checksum);
#endif
- if ((card = kzalloc(sizeof(struct pnp_card), GFP_KERNEL)) == NULL)
+ if ((card =
+ kzalloc(sizeof(struct pnp_card), GFP_KERNEL)) == NULL)
continue;
card->number = csn;
INIT_LIST_HEAD(&card->devices);
- isapnp_parse_card_id(card, (header[1] << 8) | header[0], (header[3] << 8) | header[2]);
- card->serial = (header[7] << 24) | (header[6] << 16) | (header[5] << 8) | header[4];
+ isapnp_parse_card_id(card, (header[1] << 8) | header[0],
+ (header[3] << 8) | header[2]);
+ card->serial =
+ (header[7] << 24) | (header[6] << 16) | (header[5] << 8) |
+ header[4];
isapnp_checksum_value = 0x00;
isapnp_parse_resource_map(card);
if (isapnp_checksum_value != 0x00)
- printk(KERN_ERR "isapnp: checksum for device %i is not valid (0x%x)\n", csn, isapnp_checksum_value);
+ printk(KERN_ERR
+ "isapnp: checksum for device %i is not valid (0x%x)\n",
+ csn, isapnp_checksum_value);
card->checksum = isapnp_checksum_value;
card->protocol = &isapnp_protocol;
int isapnp_present(void)
{
struct pnp_card *card;
+
pnp_for_each_card(card) {
if (card->protocol == &isapnp_protocol)
return 1;
/* it is possible to set RDP only in the isolation phase */
/* Jens Thoms Toerring <Jens.Toerring@physik.fu-berlin.de> */
isapnp_write_byte(0x02, 0x04); /* clear CSN of card */
- mdelay(2); /* is this necessary? */
- isapnp_wake(csn); /* bring card into sleep state */
- isapnp_wake(0); /* bring card into isolation state */
- isapnp_set_rdp(); /* reset the RDP port */
- udelay(1000); /* delay 1000us */
+ mdelay(2); /* is this necessary? */
+ isapnp_wake(csn); /* bring card into sleep state */
+ isapnp_wake(0); /* bring card into isolation state */
+ isapnp_set_rdp(); /* reset the RDP port */
+ udelay(1000); /* delay 1000us */
isapnp_write_byte(0x06, csn); /* reset CSN to previous value */
- udelay(250); /* is this necessary? */
+ udelay(250); /* is this necessary? */
#endif
if (logdev >= 0)
isapnp_device(logdev);
return 0;
}
-
/*
- * Inititialization.
+ * Initialization.
*/
-
EXPORT_SYMBOL(isapnp_protocol);
EXPORT_SYMBOL(isapnp_present);
EXPORT_SYMBOL(isapnp_cfg_begin);
#endif
EXPORT_SYMBOL(isapnp_write_byte);
-static int isapnp_read_resources(struct pnp_dev *dev, struct pnp_resource_table *res)
+static int isapnp_read_resources(struct pnp_dev *dev,
+ struct pnp_resource_table *res)
{
int tmp, ret;
res->port_resource[tmp].flags = IORESOURCE_IO;
}
for (tmp = 0; tmp < PNP_MAX_MEM; tmp++) {
- ret = isapnp_read_word(ISAPNP_CFG_MEM + (tmp << 3)) << 8;
+ ret =
+ isapnp_read_word(ISAPNP_CFG_MEM + (tmp << 3)) << 8;
if (!ret)
continue;
res->mem_resource[tmp].start = ret;
res->mem_resource[tmp].flags = IORESOURCE_MEM;
}
for (tmp = 0; tmp < PNP_MAX_IRQ; tmp++) {
- ret = (isapnp_read_word(ISAPNP_CFG_IRQ + (tmp << 1)) >> 8);
+ ret =
+ (isapnp_read_word(ISAPNP_CFG_IRQ + (tmp << 1)) >>
+ 8);
if (!ret)
continue;
- res->irq_resource[tmp].start = res->irq_resource[tmp].end = ret;
+ res->irq_resource[tmp].start =
+ res->irq_resource[tmp].end = ret;
res->irq_resource[tmp].flags = IORESOURCE_IRQ;
}
for (tmp = 0; tmp < PNP_MAX_DMA; tmp++) {
ret = isapnp_read_byte(ISAPNP_CFG_DMA + tmp);
if (ret == 4)
continue;
- res->dma_resource[tmp].start = res->dma_resource[tmp].end = ret;
+ res->dma_resource[tmp].start =
+ res->dma_resource[tmp].end = ret;
res->dma_resource[tmp].flags = IORESOURCE_DMA;
}
}
return 0;
}
-static int isapnp_get_resources(struct pnp_dev *dev, struct pnp_resource_table * res)
+static int isapnp_get_resources(struct pnp_dev *dev,
+ struct pnp_resource_table *res)
{
int ret;
pnp_init_resource_table(res);
return ret;
}
-static int isapnp_set_resources(struct pnp_dev *dev, struct pnp_resource_table * res)
+static int isapnp_set_resources(struct pnp_dev *dev,
+ struct pnp_resource_table *res)
{
int tmp;
isapnp_cfg_begin(dev->card->number, dev->number);
dev->active = 1;
- for (tmp = 0; tmp < PNP_MAX_PORT && (res->port_resource[tmp].flags & (IORESOURCE_IO | IORESOURCE_UNSET)) == IORESOURCE_IO; tmp++)
- isapnp_write_word(ISAPNP_CFG_PORT+(tmp<<1), res->port_resource[tmp].start);
- for (tmp = 0; tmp < PNP_MAX_IRQ && (res->irq_resource[tmp].flags & (IORESOURCE_IRQ | IORESOURCE_UNSET)) == IORESOURCE_IRQ; tmp++) {
+ for (tmp = 0;
+ tmp < PNP_MAX_PORT
+ && (res->port_resource[tmp].
+ flags & (IORESOURCE_IO | IORESOURCE_UNSET)) == IORESOURCE_IO;
+ tmp++)
+ isapnp_write_word(ISAPNP_CFG_PORT + (tmp << 1),
+ res->port_resource[tmp].start);
+ for (tmp = 0;
+ tmp < PNP_MAX_IRQ
+ && (res->irq_resource[tmp].
+ flags & (IORESOURCE_IRQ | IORESOURCE_UNSET)) == IORESOURCE_IRQ;
+ tmp++) {
int irq = res->irq_resource[tmp].start;
if (irq == 2)
irq = 9;
- isapnp_write_byte(ISAPNP_CFG_IRQ+(tmp<<1), irq);
+ isapnp_write_byte(ISAPNP_CFG_IRQ + (tmp << 1), irq);
}
- for (tmp = 0; tmp < PNP_MAX_DMA && (res->dma_resource[tmp].flags & (IORESOURCE_DMA | IORESOURCE_UNSET)) == IORESOURCE_DMA; tmp++)
- isapnp_write_byte(ISAPNP_CFG_DMA+tmp, res->dma_resource[tmp].start);
- for (tmp = 0; tmp < PNP_MAX_MEM && (res->mem_resource[tmp].flags & (IORESOURCE_MEM | IORESOURCE_UNSET)) == IORESOURCE_MEM; tmp++)
- isapnp_write_word(ISAPNP_CFG_MEM+(tmp<<3), (res->mem_resource[tmp].start >> 8) & 0xffff);
+ for (tmp = 0;
+ tmp < PNP_MAX_DMA
+ && (res->dma_resource[tmp].
+ flags & (IORESOURCE_DMA | IORESOURCE_UNSET)) == IORESOURCE_DMA;
+ tmp++)
+ isapnp_write_byte(ISAPNP_CFG_DMA + tmp,
+ res->dma_resource[tmp].start);
+ for (tmp = 0;
+ tmp < PNP_MAX_MEM
+ && (res->mem_resource[tmp].
+ flags & (IORESOURCE_MEM | IORESOURCE_UNSET)) == IORESOURCE_MEM;
+ tmp++)
+ isapnp_write_word(ISAPNP_CFG_MEM + (tmp << 3),
+ (res->mem_resource[tmp].start >> 8) & 0xffff);
/* FIXME: We aren't handling 32bit mems properly here */
isapnp_activate(dev->number);
isapnp_cfg_end();
}
struct pnp_protocol isapnp_protocol = {
- .name = "ISA Plug and Play",
- .get = isapnp_get_resources,
- .set = isapnp_set_resources,
+ .name = "ISA Plug and Play",
+ .get = isapnp_get_resources,
+ .set = isapnp_set_resources,
.disable = isapnp_disable_resources,
};
#endif
#ifdef ISAPNP_REGION_OK
if (!request_region(_PIDXR, 1, "isapnp index")) {
- printk(KERN_ERR "isapnp: Index Register 0x%x already used\n", _PIDXR);
+ printk(KERN_ERR "isapnp: Index Register 0x%x already used\n",
+ _PIDXR);
return -EBUSY;
}
#endif
if (!request_region(_PNPWRP, 1, "isapnp write")) {
- printk(KERN_ERR "isapnp: Write Data Register 0x%x already used\n", _PNPWRP);
+ printk(KERN_ERR
+ "isapnp: Write Data Register 0x%x already used\n",
+ _PNPWRP);
#ifdef ISAPNP_REGION_OK
release_region(_PIDXR, 1);
#endif
return -EBUSY;
}
- if(pnp_register_protocol(&isapnp_protocol)<0)
+ if (pnp_register_protocol(&isapnp_protocol) < 0)
return -EBUSY;
/*
- * Print a message. The existing ISAPnP code is hanging machines
- * so let the user know where.
+ * Print a message. The existing ISAPnP code is hanging machines
+ * so let the user know where.
*/
-
+
printk(KERN_INFO "isapnp: Scanning for PnP cards...\n");
if (isapnp_rdp >= 0x203 && isapnp_rdp <= 0x3ff) {
isapnp_rdp |= 3;
if (!request_region(isapnp_rdp, 1, "isapnp read")) {
- printk(KERN_ERR "isapnp: Read Data Register 0x%x already used\n", isapnp_rdp);
+ printk(KERN_ERR
+ "isapnp: Read Data Register 0x%x already used\n",
+ isapnp_rdp);
#ifdef ISAPNP_REGION_OK
release_region(_PIDXR, 1);
#endif
isapnp_detected = 1;
if (isapnp_rdp < 0x203 || isapnp_rdp > 0x3ff) {
cards = isapnp_isolate();
- if (cards < 0 ||
- (isapnp_rdp < 0x203 || isapnp_rdp > 0x3ff)) {
+ if (cards < 0 || (isapnp_rdp < 0x203 || isapnp_rdp > 0x3ff)) {
#ifdef ISAPNP_REGION_OK
release_region(_PIDXR, 1);
#endif
release_region(_PNPWRP, 1);
isapnp_detected = 0;
- printk(KERN_INFO "isapnp: No Plug & Play device found\n");
+ printk(KERN_INFO
+ "isapnp: No Plug & Play device found\n");
return 0;
}
request_region(isapnp_rdp, 1, "isapnp read");
isapnp_build_device_list();
cards = 0;
- protocol_for_each_card(&isapnp_protocol,card) {
+ protocol_for_each_card(&isapnp_protocol, card) {
cards++;
if (isapnp_verbose) {
- printk(KERN_INFO "isapnp: Card '%s'\n", card->name[0]?card->name:"Unknown");
+ printk(KERN_INFO "isapnp: Card '%s'\n",
+ card->name[0] ? card->name : "Unknown");
if (isapnp_verbose < 2)
continue;
- card_for_each_dev(card,dev) {
- printk(KERN_INFO "isapnp: Device '%s'\n", dev->name[0]?dev->name:"Unknown");
+ card_for_each_dev(card, dev) {
+ printk(KERN_INFO "isapnp: Device '%s'\n",
+ dev->name[0] ? dev->name : "Unknown");
}
}
}
if (cards) {
- printk(KERN_INFO "isapnp: %i Plug & Play card%s detected total\n", cards, cards>1?"s":"");
+ printk(KERN_INFO
+ "isapnp: %i Plug & Play card%s detected total\n", cards,
+ cards > 1 ? "s" : "");
} else {
printk(KERN_INFO "isapnp: No Plug & Play card found\n");
}
static int __init isapnp_setup_isapnp(char *str)
{
- (void)((get_option(&str,&isapnp_rdp) == 2) &&
- (get_option(&str,&isapnp_reset) == 2) &&
- (get_option(&str,&isapnp_verbose) == 2));
+ (void)((get_option(&str, &isapnp_rdp) == 2) &&
+ (get_option(&str, &isapnp_reset) == 2) &&
+ (get_option(&str, &isapnp_verbose) == 2));
return 1;
}
__setup("isapnp=", isapnp_setup_isapnp);
-
* ISA Plug & Play support
* Copyright (c) by Jaroslav Kysela <perex@suse.cz>
*
- *
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- *
*/
#include <linux/module.h>
return (file->f_pos = new);
}
-static ssize_t isapnp_proc_bus_read(struct file *file, char __user *buf, size_t nbytes, loff_t *ppos)
+static ssize_t isapnp_proc_bus_read(struct file *file, char __user * buf,
+ size_t nbytes, loff_t * ppos)
{
struct inode *ino = file->f_path.dentry->d_inode;
struct proc_dir_entry *dp = PDE(ino);
return -EINVAL;
isapnp_cfg_begin(dev->card->number, dev->number);
- for ( ; pos < 256 && cnt > 0; pos++, buf++, cnt--) {
+ for (; pos < 256 && cnt > 0; pos++, buf++, cnt--) {
unsigned char val;
val = isapnp_read_byte(pos);
__put_user(val, buf);
return nbytes;
}
-static const struct file_operations isapnp_proc_bus_file_operations =
-{
- .llseek = isapnp_proc_bus_lseek,
- .read = isapnp_proc_bus_read,
+static const struct file_operations isapnp_proc_bus_file_operations = {
+ .llseek = isapnp_proc_bus_lseek,
+ .read = isapnp_proc_bus_read,
};
static int isapnp_proc_attach_device(struct pnp_dev *dev)
remove_proc_entry(name, isapnp_proc_bus_dir);
return 0;
}
-#endif /* MODULE */
+#endif /* MODULE */
int __init isapnp_proc_init(void)
{
struct pnp_dev *dev;
+
isapnp_proc_bus_dir = proc_mkdir("isapnp", proc_bus);
- protocol_for_each_dev(&isapnp_protocol,dev) {
+ protocol_for_each_dev(&isapnp_protocol, dev) {
isapnp_proc_attach_device(dev);
}
return 0;
remove_proc_entry("isapnp", proc_bus);
return 0;
}
-#endif /* MODULE */
+#endif /* MODULE */
*
* based on isapnp.c resource management (c) Jaroslav Kysela <perex@suse.cz>
* Copyright 2003 Adam Belay <ambx1@neo.rr.com>
- *
*/
#include <linux/errno.h>
return -EINVAL;
if (idx >= PNP_MAX_PORT) {
- pnp_err("More than 4 ports is incompatible with pnp specifications.");
+ pnp_err
+ ("More than 4 ports is incompatible with pnp specifications.");
/* pretend we were successful so at least the manager won't try again */
return 1;
}
/* set the initial values */
*flags |= rule->flags | IORESOURCE_IO;
- *flags &= ~IORESOURCE_UNSET;
+ *flags &= ~IORESOURCE_UNSET;
if (!rule->size) {
*flags |= IORESOURCE_DISABLED;
- return 1; /* skip disabled resource requests */
+ return 1; /* skip disabled resource requests */
}
*start = rule->min;
return -EINVAL;
if (idx >= PNP_MAX_MEM) {
- pnp_err("More than 8 mems is incompatible with pnp specifications.");
+ pnp_err
+ ("More than 8 mems is incompatible with pnp specifications.");
/* pretend we were successful so at least the manager won't try again */
return 1;
}
/* set the initial values */
*flags |= rule->flags | IORESOURCE_MEM;
- *flags &= ~IORESOURCE_UNSET;
+ *flags &= ~IORESOURCE_UNSET;
/* convert pnp flags to standard Linux flags */
if (!(rule->flags & IORESOURCE_MEM_WRITEABLE))
if (!rule->size) {
*flags |= IORESOURCE_DISABLED;
- return 1; /* skip disabled resource requests */
+ return 1; /* skip disabled resource requests */
}
*start = rule->min;
- *end = *start + rule->size -1;
+ *end = *start + rule->size - 1;
/* run through until pnp_check_mem is happy */
while (!pnp_check_mem(dev, idx)) {
return 1;
}
-static int pnp_assign_irq(struct pnp_dev * dev, struct pnp_irq *rule, int idx)
+static int pnp_assign_irq(struct pnp_dev *dev, struct pnp_irq *rule, int idx)
{
resource_size_t *start, *end;
unsigned long *flags;
return -EINVAL;
if (idx >= PNP_MAX_IRQ) {
- pnp_err("More than 2 irqs is incompatible with pnp specifications.");
+ pnp_err
+ ("More than 2 irqs is incompatible with pnp specifications.");
/* pretend we were successful so at least the manager won't try again */
return 1;
}
/* set the initial values */
*flags |= rule->flags | IORESOURCE_IRQ;
- *flags &= ~IORESOURCE_UNSET;
+ *flags &= ~IORESOURCE_UNSET;
if (bitmap_empty(rule->map, PNP_IRQ_NR)) {
*flags |= IORESOURCE_DISABLED;
- return 1; /* skip disabled resource requests */
+ return 1; /* skip disabled resource requests */
}
/* TBD: need check for >16 IRQ */
return 1;
}
for (i = 0; i < 16; i++) {
- if(test_bit(xtab[i], rule->map)) {
+ if (test_bit(xtab[i], rule->map)) {
*start = *end = xtab[i];
- if(pnp_check_irq(dev, idx))
+ if (pnp_check_irq(dev, idx))
return 1;
}
}
return -EINVAL;
if (idx >= PNP_MAX_DMA) {
- pnp_err("More than 2 dmas is incompatible with pnp specifications.");
+ pnp_err
+ ("More than 2 dmas is incompatible with pnp specifications.");
/* pretend we were successful so at least the manager won't try again */
return 1;
}
/* set the initial values */
*flags |= rule->flags | IORESOURCE_DMA;
- *flags &= ~IORESOURCE_UNSET;
+ *flags &= ~IORESOURCE_UNSET;
if (!rule->map) {
*flags |= IORESOURCE_DISABLED;
- return 1; /* skip disabled resource requests */
+ return 1; /* skip disabled resource requests */
}
for (i = 0; i < 8; i++) {
- if(rule->map & (1<<xtab[i])) {
+ if (rule->map & (1 << xtab[i])) {
*start = *end = xtab[i];
- if(pnp_check_dma(dev, idx))
+ if (pnp_check_dma(dev, idx))
return 1;
}
}
/**
* pnp_init_resources - Resets a resource table to default values.
* @table: pointer to the desired resource table
- *
*/
void pnp_init_resource_table(struct pnp_resource_table *table)
{
int idx;
+
for (idx = 0; idx < PNP_MAX_IRQ; idx++) {
table->irq_resource[idx].name = NULL;
table->irq_resource[idx].start = -1;
table->irq_resource[idx].end = -1;
- table->irq_resource[idx].flags = IORESOURCE_IRQ | IORESOURCE_AUTO | IORESOURCE_UNSET;
+ table->irq_resource[idx].flags =
+ IORESOURCE_IRQ | IORESOURCE_AUTO | IORESOURCE_UNSET;
}
for (idx = 0; idx < PNP_MAX_DMA; idx++) {
table->dma_resource[idx].name = NULL;
table->dma_resource[idx].start = -1;
table->dma_resource[idx].end = -1;
- table->dma_resource[idx].flags = IORESOURCE_DMA | IORESOURCE_AUTO | IORESOURCE_UNSET;
+ table->dma_resource[idx].flags =
+ IORESOURCE_DMA | IORESOURCE_AUTO | IORESOURCE_UNSET;
}
for (idx = 0; idx < PNP_MAX_PORT; idx++) {
table->port_resource[idx].name = NULL;
table->port_resource[idx].start = 0;
table->port_resource[idx].end = 0;
- table->port_resource[idx].flags = IORESOURCE_IO | IORESOURCE_AUTO | IORESOURCE_UNSET;
+ table->port_resource[idx].flags =
+ IORESOURCE_IO | IORESOURCE_AUTO | IORESOURCE_UNSET;
}
for (idx = 0; idx < PNP_MAX_MEM; idx++) {
table->mem_resource[idx].name = NULL;
table->mem_resource[idx].start = 0;
table->mem_resource[idx].end = 0;
- table->mem_resource[idx].flags = IORESOURCE_MEM | IORESOURCE_AUTO | IORESOURCE_UNSET;
+ table->mem_resource[idx].flags =
+ IORESOURCE_MEM | IORESOURCE_AUTO | IORESOURCE_UNSET;
}
}
/**
* pnp_clean_resources - clears resources that were not manually set
* @res: the resources to clean
- *
*/
-static void pnp_clean_resource_table(struct pnp_resource_table * res)
+static void pnp_clean_resource_table(struct pnp_resource_table *res)
{
int idx;
+
for (idx = 0; idx < PNP_MAX_IRQ; idx++) {
if (!(res->irq_resource[idx].flags & IORESOURCE_AUTO))
continue;
res->irq_resource[idx].start = -1;
res->irq_resource[idx].end = -1;
- res->irq_resource[idx].flags = IORESOURCE_IRQ | IORESOURCE_AUTO | IORESOURCE_UNSET;
+ res->irq_resource[idx].flags =
+ IORESOURCE_IRQ | IORESOURCE_AUTO | IORESOURCE_UNSET;
}
for (idx = 0; idx < PNP_MAX_DMA; idx++) {
if (!(res->dma_resource[idx].flags & IORESOURCE_AUTO))
continue;
res->dma_resource[idx].start = -1;
res->dma_resource[idx].end = -1;
- res->dma_resource[idx].flags = IORESOURCE_DMA | IORESOURCE_AUTO | IORESOURCE_UNSET;
+ res->dma_resource[idx].flags =
+ IORESOURCE_DMA | IORESOURCE_AUTO | IORESOURCE_UNSET;
}
for (idx = 0; idx < PNP_MAX_PORT; idx++) {
if (!(res->port_resource[idx].flags & IORESOURCE_AUTO))
continue;
res->port_resource[idx].start = 0;
res->port_resource[idx].end = 0;
- res->port_resource[idx].flags = IORESOURCE_IO | IORESOURCE_AUTO | IORESOURCE_UNSET;
+ res->port_resource[idx].flags =
+ IORESOURCE_IO | IORESOURCE_AUTO | IORESOURCE_UNSET;
}
for (idx = 0; idx < PNP_MAX_MEM; idx++) {
if (!(res->mem_resource[idx].flags & IORESOURCE_AUTO))
continue;
res->mem_resource[idx].start = 0;
res->mem_resource[idx].end = 0;
- res->mem_resource[idx].flags = IORESOURCE_MEM | IORESOURCE_AUTO | IORESOURCE_UNSET;
+ res->mem_resource[idx].flags =
+ IORESOURCE_MEM | IORESOURCE_AUTO | IORESOURCE_UNSET;
}
}
return -ENODEV;
down(&pnp_res_mutex);
- pnp_clean_resource_table(&dev->res); /* start with a fresh slate */
+ pnp_clean_resource_table(&dev->res); /* start with a fresh slate */
if (dev->independent) {
port = dev->independent->port;
mem = dev->independent->mem;
if (depnum) {
struct pnp_option *dep;
int i;
- for (i=1,dep=dev->dependent; i<depnum; i++, dep=dep->next)
- if(!dep)
+ for (i = 1, dep = dev->dependent; i < depnum;
+ i++, dep = dep->next)
+ if (!dep)
goto fail;
- port =dep->port;
+ port = dep->port;
mem = dep->mem;
irq = dep->irq;
dma = dep->dma;
up(&pnp_res_mutex);
return 1;
-fail:
+ fail:
pnp_clean_resource_table(&dev->res);
up(&pnp_res_mutex);
return 0;
*
* This function can be used by drivers that want to manually set thier resources.
*/
-int pnp_manual_config_dev(struct pnp_dev *dev, struct pnp_resource_table * res, int mode)
+int pnp_manual_config_dev(struct pnp_dev *dev, struct pnp_resource_table *res,
+ int mode)
{
int i;
- struct pnp_resource_table * bak;
+ struct pnp_resource_table *bak;
+
if (!dev || !res)
return -EINVAL;
if (!pnp_can_configure(dev))
dev->res = *res;
if (!(mode & PNP_CONFIG_FORCE)) {
for (i = 0; i < PNP_MAX_PORT; i++) {
- if(!pnp_check_port(dev,i))
+ if (!pnp_check_port(dev, i))
goto fail;
}
for (i = 0; i < PNP_MAX_MEM; i++) {
- if(!pnp_check_mem(dev,i))
+ if (!pnp_check_mem(dev, i))
goto fail;
}
for (i = 0; i < PNP_MAX_IRQ; i++) {
- if(!pnp_check_irq(dev,i))
+ if (!pnp_check_irq(dev, i))
goto fail;
}
for (i = 0; i < PNP_MAX_DMA; i++) {
- if(!pnp_check_dma(dev,i))
+ if (!pnp_check_dma(dev, i))
goto fail;
}
}
kfree(bak);
return 0;
-fail:
+ fail:
dev->res = *bak;
up(&pnp_res_mutex);
kfree(bak);
/**
* pnp_auto_config_dev - automatically assigns resources to a device
* @dev: pointer to the desired device
- *
*/
int pnp_auto_config_dev(struct pnp_dev *dev)
{
struct pnp_option *dep;
int i = 1;
- if(!dev)
+ if (!dev)
return -EINVAL;
- if(!pnp_can_configure(dev)) {
- pnp_dbg("Device %s does not support resource configuration.", dev->dev.bus_id);
+ if (!pnp_can_configure(dev)) {
+ pnp_dbg("Device %s does not support resource configuration.",
+ dev->dev.bus_id);
return -ENODEV;
}
* pnp_start_dev - low-level start of the PnP device
* @dev: pointer to the desired device
*
- * assumes that resources have alread been allocated
+ * assumes that resources have already been allocated
*/
-
int pnp_start_dev(struct pnp_dev *dev)
{
if (!pnp_can_write(dev)) {
- pnp_dbg("Device %s does not support activation.", dev->dev.bus_id);
+ pnp_dbg("Device %s does not support activation.",
+ dev->dev.bus_id);
return -EINVAL;
}
- if (dev->protocol->set(dev, &dev->res)<0) {
+ if (dev->protocol->set(dev, &dev->res) < 0) {
pnp_err("Failed to activate device %s.", dev->dev.bus_id);
return -EIO;
}
pnp_info("Device %s activated.", dev->dev.bus_id);
-
return 0;
}
*
* does not free resources
*/
-
int pnp_stop_dev(struct pnp_dev *dev)
{
if (!pnp_can_disable(dev)) {
- pnp_dbg("Device %s does not support disabling.", dev->dev.bus_id);
+ pnp_dbg("Device %s does not support disabling.",
+ dev->dev.bus_id);
return -EINVAL;
}
- if (dev->protocol->disable(dev)<0) {
+ if (dev->protocol->disable(dev) < 0) {
pnp_err("Failed to disable device %s.", dev->dev.bus_id);
return -EIO;
}
pnp_info("Device %s disabled.", dev->dev.bus_id);
-
return 0;
}
if (!dev)
return -EINVAL;
- if (dev->active) {
- return 0; /* the device is already active */
- }
+ if (dev->active)
+ return 0; /* the device is already active */
/* ensure resources are allocated */
if (pnp_auto_config_dev(dev))
return error;
dev->active = 1;
-
return 1;
}
{
int error;
- if (!dev)
- return -EINVAL;
- if (!dev->active) {
- return 0; /* the device is already disabled */
- }
+ if (!dev)
+ return -EINVAL;
+ if (!dev->active)
+ return 0; /* the device is already disabled */
error = pnp_stop_dev(dev);
if (error)
* @resource: pointer to resource to be changed
* @start: start of region
* @size: size of region
- *
*/
void pnp_resource_change(struct resource *resource, resource_size_t start,
- resource_size_t size)
+ resource_size_t size)
{
if (resource == NULL)
return;
resource->end = start + size - 1;
}
-
EXPORT_SYMBOL(pnp_manual_config_dev);
-#if 0
-EXPORT_SYMBOL(pnp_auto_config_dev);
-#endif
EXPORT_SYMBOL(pnp_start_dev);
EXPORT_SYMBOL(pnp_stop_dev);
EXPORT_SYMBOL(pnp_activate_dev);
#include <linux/acpi.h>
#include <linux/pnp.h>
+#include <linux/mod_devicetable.h>
#include <acpi/acpi_bus.h>
+#include <acpi/actypes.h>
+
#include "pnpacpi.h"
static int num = 0;
* used by the kernel (PCI root, ...), as it is harmless and there were
* already present in pnpbios. But there is an exception for devices that
* have irqs (PIC, Timer) because we call acpi_register_gsi.
- * Finaly only devices that have a CRS method need to be in this list.
+ * Finally, only devices that have a CRS method need to be in this list.
*/
-static char __initdata excluded_id_list[] =
- "PNP0C09," /* EC */
- "PNP0C0F," /* Link device */
- "PNP0000," /* PIC */
- "PNP0100," /* Timer */
- ;
+static struct __initdata acpi_device_id excluded_id_list[] = {
+ {"PNP0C09", 0}, /* EC */
+ {"PNP0C0F", 0}, /* Link device */
+ {"PNP0000", 0}, /* PIC */
+ {"PNP0100", 0}, /* Timer */
+ {"", 0},
+};
+
static inline int is_exclusive_device(struct acpi_device *dev)
{
- return (!acpi_match_ids(dev, excluded_id_list));
+ return (!acpi_match_device_ids(dev, excluded_id_list));
}
/*
str[7] = '\0';
}
-static int pnpacpi_get_resources(struct pnp_dev * dev, struct pnp_resource_table * res)
+static int pnpacpi_get_resources(struct pnp_dev *dev,
+ struct pnp_resource_table *res)
{
acpi_status status;
- status = pnpacpi_parse_allocated_resource((acpi_handle)dev->data,
- &dev->res);
+
+ status = pnpacpi_parse_allocated_resource((acpi_handle) dev->data,
+ &dev->res);
return ACPI_FAILURE(status) ? -ENODEV : 0;
}
-static int pnpacpi_set_resources(struct pnp_dev * dev, struct pnp_resource_table * res)
+static int pnpacpi_set_resources(struct pnp_dev *dev,
+ struct pnp_resource_table *res)
{
acpi_handle handle = dev->data;
struct acpi_buffer buffer;
acpi_status status;
/* acpi_unregister_gsi(pnp_irq(dev, 0)); */
- status = acpi_evaluate_object((acpi_handle)dev->data,
- "_DIS", NULL, NULL);
+ status = acpi_evaluate_object((acpi_handle) dev->data,
+ "_DIS", NULL, NULL);
return ACPI_FAILURE(status) ? -ENODEV : 0;
}
+static int pnpacpi_suspend(struct pnp_dev *dev, pm_message_t state)
+{
+ return acpi_bus_set_power((acpi_handle) dev->data,
+ acpi_pm_device_sleep_state(&dev->dev,
+ device_may_wakeup
+ (&dev->dev),
+ NULL));
+}
+
+static int pnpacpi_resume(struct pnp_dev *dev)
+{
+ return acpi_bus_set_power((acpi_handle) dev->data, ACPI_STATE_D0);
+}
+
static struct pnp_protocol pnpacpi_protocol = {
- .name = "Plug and Play ACPI",
- .get = pnpacpi_get_resources,
- .set = pnpacpi_set_resources,
+ .name = "Plug and Play ACPI",
+ .get = pnpacpi_get_resources,
+ .set = pnpacpi_set_resources,
.disable = pnpacpi_disable_resources,
+ .suspend = pnpacpi_suspend,
+ .resume = pnpacpi_resume,
};
static int __init pnpacpi_add_device(struct acpi_device *device)
status = acpi_get_handle(device->handle, "_CRS", &temp);
if (ACPI_FAILURE(status) || !ispnpidacpi(acpi_device_hid(device)) ||
- is_exclusive_device(device))
+ is_exclusive_device(device))
return 0;
pnp_dbg("ACPI device : hid %s", acpi_device_hid(device));
- dev = kzalloc(sizeof(struct pnp_dev), GFP_KERNEL);
+ dev = kzalloc(sizeof(struct pnp_dev), GFP_KERNEL);
if (!dev) {
pnp_err("Out of memory");
return -ENOMEM;
}
dev->data = device->handle;
- /* .enabled means if the device can decode the resources */
+ /* .enabled means the device can decode the resources */
dev->active = device->status.enabled;
status = acpi_get_handle(device->handle, "_SRS", &temp);
if (ACPI_SUCCESS(status))
pnpidacpi_to_pnpid(acpi_device_hid(device), dev_id->id);
pnp_add_id(dev_id, dev);
- if(dev->active) {
+ if (dev->active) {
/* parse allocated resource */
- status = pnpacpi_parse_allocated_resource(device->handle, &dev->res);
+ status = pnpacpi_parse_allocated_resource(device->handle,
+ &dev->res);
if (ACPI_FAILURE(status) && (status != AE_NOT_FOUND)) {
- pnp_err("PnPACPI: METHOD_NAME__CRS failure for %s", dev_id->id);
+ pnp_err("PnPACPI: METHOD_NAME__CRS failure for %s",
+ dev_id->id);
goto err1;
}
}
- if(dev->capabilities & PNP_CONFIGURABLE) {
+ if (dev->capabilities & PNP_CONFIGURABLE) {
status = pnpacpi_parse_resource_option_data(device->handle,
- dev);
+ dev);
if (ACPI_FAILURE(status) && (status != AE_NOT_FOUND)) {
- pnp_err("PnPACPI: METHOD_NAME__PRS failure for %s", dev_id->id);
+ pnp_err("PnPACPI: METHOD_NAME__PRS failure for %s",
+ dev_id->id);
goto err1;
}
}
if (!dev->active)
pnp_init_resource_table(&dev->res);
pnp_add_device(dev);
- num ++;
+ num++;
return AE_OK;
-err1:
+ err1:
kfree(dev_id);
-err:
+ err:
kfree(dev);
return -EINVAL;
}
static acpi_status __init pnpacpi_add_device_handler(acpi_handle handle,
- u32 lvl, void *context, void **rv)
+ u32 lvl, void *context,
+ void **rv)
{
struct acpi_device *device;
static int __init acpi_pnp_match(struct device *dev, void *_pnp)
{
- struct acpi_device *acpi = to_acpi_device(dev);
- struct pnp_dev *pnp = _pnp;
+ struct acpi_device *acpi = to_acpi_device(dev);
+ struct pnp_dev *pnp = _pnp;
/* true means it matched */
return acpi->flags.hardware_id
- && !acpi_get_physical_device(acpi->handle)
- && compare_pnp_id(pnp->id, acpi->pnp.hardware_id);
+ && !acpi_get_physical_device(acpi->handle)
+ && compare_pnp_id(pnp->id, acpi->pnp.hardware_id);
}
-static int __init acpi_pnp_find_device(struct device *dev, acpi_handle *handle)
+static int __init acpi_pnp_find_device(struct device *dev, acpi_handle * handle)
{
- struct device *adev;
- struct acpi_device *acpi;
+ struct device *adev;
+ struct acpi_device *acpi;
adev = bus_find_device(&acpi_bus_type, NULL,
- to_pnp_dev(dev),
- acpi_pnp_match);
+ to_pnp_dev(dev), acpi_pnp_match);
if (!adev)
return -ENODEV;
* pnpdev->dev.archdata.acpi_handle point to its ACPI sibling.
*/
static struct acpi_bus_type __initdata acpi_pnp_bus = {
- .bus = &pnp_bus_type,
+ .bus = &pnp_bus_type,
.find_device = acpi_pnp_find_device,
};
pnp_platform_devices = 1;
return 0;
}
+
subsys_initcall(pnpacpi_init);
static int __init pnpacpi_setup(char *str)
pnpacpi_disabled = 1;
return 1;
}
-__setup("pnpacpi=", pnpacpi_setup);
-#if 0
-EXPORT_SYMBOL(pnpacpi_protocol);
-#endif
+__setup("pnpacpi=", pnpacpi_setup);
flag = IORESOURCE_IRQ_LOWLEVEL;
else
flag = IORESOURCE_IRQ_HIGHLEVEL;
- }
- else {
+ } else {
if (polarity == ACPI_ACTIVE_LOW)
flag = IORESOURCE_IRQ_LOWEDGE;
else
}
}
-static void
-pnpacpi_parse_allocated_irqresource(struct pnp_resource_table *res, u32 gsi,
- int triggering, int polarity, int shareable)
+static void pnpacpi_parse_allocated_irqresource(struct pnp_resource_table *res,
+ u32 gsi, int triggering,
+ int polarity, int shareable)
{
int i = 0;
int irq;
return;
while (!(res->irq_resource[i].flags & IORESOURCE_UNSET) &&
- i < PNP_MAX_IRQ)
+ i < PNP_MAX_IRQ)
i++;
if (i >= PNP_MAX_IRQ)
return;
- res->irq_resource[i].flags = IORESOURCE_IRQ; // Also clears _UNSET flag
+ res->irq_resource[i].flags = IORESOURCE_IRQ; // Also clears _UNSET flag
res->irq_resource[i].flags |= irq_flags(triggering, polarity);
irq = acpi_register_gsi(gsi, triggering, polarity);
if (irq < 0) {
return flags;
}
-static void
-pnpacpi_parse_allocated_dmaresource(struct pnp_resource_table *res, u32 dma,
- int type, int bus_master, int transfer)
+static void pnpacpi_parse_allocated_dmaresource(struct pnp_resource_table *res,
+ u32 dma, int type,
+ int bus_master, int transfer)
{
int i = 0;
+
while (i < PNP_MAX_DMA &&
- !(res->dma_resource[i].flags & IORESOURCE_UNSET))
+ !(res->dma_resource[i].flags & IORESOURCE_UNSET))
i++;
if (i < PNP_MAX_DMA) {
- res->dma_resource[i].flags = IORESOURCE_DMA; // Also clears _UNSET flag
- res->dma_resource[i].flags |= dma_flags(type, bus_master, transfer);
+ res->dma_resource[i].flags = IORESOURCE_DMA; // Also clears _UNSET flag
+ res->dma_resource[i].flags |=
+ dma_flags(type, bus_master, transfer);
if (dma == -1) {
res->dma_resource[i].flags |= IORESOURCE_DISABLED;
return;
}
}
-static void
-pnpacpi_parse_allocated_ioresource(struct pnp_resource_table *res,
- u64 io, u64 len, int io_decode)
+static void pnpacpi_parse_allocated_ioresource(struct pnp_resource_table *res,
+ u64 io, u64 len, int io_decode)
{
int i = 0;
+
while (!(res->port_resource[i].flags & IORESOURCE_UNSET) &&
- i < PNP_MAX_PORT)
+ i < PNP_MAX_PORT)
i++;
if (i < PNP_MAX_PORT) {
- res->port_resource[i].flags = IORESOURCE_IO; // Also clears _UNSET flag
+ res->port_resource[i].flags = IORESOURCE_IO; // Also clears _UNSET flag
if (io_decode == ACPI_DECODE_16)
res->port_resource[i].flags |= PNP_PORT_FLAG_16BITADDR;
- if (len <= 0 || (io + len -1) >= 0x10003) {
+ if (len <= 0 || (io + len - 1) >= 0x10003) {
res->port_resource[i].flags |= IORESOURCE_DISABLED;
return;
}
}
}
-static void
-pnpacpi_parse_allocated_memresource(struct pnp_resource_table *res,
- u64 mem, u64 len, int write_protect)
+static void pnpacpi_parse_allocated_memresource(struct pnp_resource_table *res,
+ u64 mem, u64 len,
+ int write_protect)
{
int i = 0;
+
while (!(res->mem_resource[i].flags & IORESOURCE_UNSET) &&
- (i < PNP_MAX_MEM))
+ (i < PNP_MAX_MEM))
i++;
if (i < PNP_MAX_MEM) {
- res->mem_resource[i].flags = IORESOURCE_MEM; // Also clears _UNSET flag
+ res->mem_resource[i].flags = IORESOURCE_MEM; // Also clears _UNSET flag
if (len <= 0) {
res->mem_resource[i].flags |= IORESOURCE_DISABLED;
return;
}
- if(write_protect == ACPI_READ_WRITE_MEMORY)
+ if (write_protect == ACPI_READ_WRITE_MEMORY)
res->mem_resource[i].flags |= IORESOURCE_MEM_WRITEABLE;
res->mem_resource[i].start = mem;
}
}
-static void
-pnpacpi_parse_allocated_address_space(struct pnp_resource_table *res_table,
- struct acpi_resource *res)
+static void pnpacpi_parse_allocated_address_space(struct pnp_resource_table *res_table,
+ struct acpi_resource *res)
{
struct acpi_resource_address64 addr, *p = &addr;
acpi_status status;
status = acpi_resource_to_address64(res, p);
if (!ACPI_SUCCESS(status)) {
pnp_warn("PnPACPI: failed to convert resource type %d",
- res->type);
+ res->type);
return;
}
if (p->resource_type == ACPI_MEMORY_RANGE)
pnpacpi_parse_allocated_memresource(res_table,
- p->minimum, p->address_length, p->info.mem.write_protect);
+ p->minimum, p->address_length,
+ p->info.mem.write_protect);
else if (p->resource_type == ACPI_IO_RANGE)
pnpacpi_parse_allocated_ioresource(res_table,
- p->minimum, p->address_length,
- p->granularity == 0xfff ? ACPI_DECODE_10 : ACPI_DECODE_16);
+ p->minimum, p->address_length,
+ p->granularity == 0xfff ? ACPI_DECODE_10 :
+ ACPI_DECODE_16);
}
static acpi_status pnpacpi_allocated_resource(struct acpi_resource *res,
- void *data)
+ void *data)
{
- struct pnp_resource_table *res_table = (struct pnp_resource_table *)data;
+ struct pnp_resource_table *res_table =
+ (struct pnp_resource_table *)data;
int i;
switch (res->type) {
case ACPI_RESOURCE_TYPE_DMA:
if (res->data.dma.channel_count > 0)
pnpacpi_parse_allocated_dmaresource(res_table,
- res->data.dma.channels[0],
- res->data.dma.type,
- res->data.dma.bus_master,
- res->data.dma.transfer);
+ res->data.dma.channels[0],
+ res->data.dma.type,
+ res->data.dma.bus_master,
+ res->data.dma.transfer);
break;
case ACPI_RESOURCE_TYPE_IO:
pnpacpi_parse_allocated_ioresource(res_table,
- res->data.io.minimum,
- res->data.io.address_length,
- res->data.io.io_decode);
+ res->data.io.minimum,
+ res->data.io.address_length,
+ res->data.io.io_decode);
break;
case ACPI_RESOURCE_TYPE_START_DEPENDENT:
case ACPI_RESOURCE_TYPE_FIXED_IO:
pnpacpi_parse_allocated_ioresource(res_table,
- res->data.fixed_io.address,
- res->data.fixed_io.address_length,
- ACPI_DECODE_10);
+ res->data.fixed_io.address,
+ res->data.fixed_io.address_length,
+ ACPI_DECODE_10);
break;
case ACPI_RESOURCE_TYPE_VENDOR:
case ACPI_RESOURCE_TYPE_MEMORY24:
pnpacpi_parse_allocated_memresource(res_table,
- res->data.memory24.minimum,
- res->data.memory24.address_length,
- res->data.memory24.write_protect);
+ res->data.memory24.minimum,
+ res->data.memory24.address_length,
+ res->data.memory24.write_protect);
break;
case ACPI_RESOURCE_TYPE_MEMORY32:
pnpacpi_parse_allocated_memresource(res_table,
- res->data.memory32.minimum,
- res->data.memory32.address_length,
- res->data.memory32.write_protect);
+ res->data.memory32.minimum,
+ res->data.memory32.address_length,
+ res->data.memory32.write_protect);
break;
case ACPI_RESOURCE_TYPE_FIXED_MEMORY32:
pnpacpi_parse_allocated_memresource(res_table,
- res->data.fixed_memory32.address,
- res->data.fixed_memory32.address_length,
- res->data.fixed_memory32.write_protect);
+ res->data.fixed_memory32.address,
+ res->data.fixed_memory32.address_length,
+ res->data.fixed_memory32.write_protect);
break;
case ACPI_RESOURCE_TYPE_ADDRESS16:
case ACPI_RESOURCE_TYPE_ADDRESS32:
return AE_OK;
}
-acpi_status pnpacpi_parse_allocated_resource(acpi_handle handle, struct pnp_resource_table *res)
+acpi_status pnpacpi_parse_allocated_resource(acpi_handle handle,
+ struct pnp_resource_table * res)
{
/* Blank the resource table values */
pnp_init_resource_table(res);
- return acpi_walk_resources(handle, METHOD_NAME__CRS, pnpacpi_allocated_resource, res);
+ return acpi_walk_resources(handle, METHOD_NAME__CRS,
+ pnpacpi_allocated_resource, res);
}
-static void pnpacpi_parse_dma_option(struct pnp_option *option, struct acpi_resource_dma *p)
+static void pnpacpi_parse_dma_option(struct pnp_option *option,
+ struct acpi_resource_dma *p)
{
int i;
- struct pnp_dma * dma;
+ struct pnp_dma *dma;
if (p->channel_count == 0)
return;
if (!dma)
return;
- for(i = 0; i < p->channel_count; i++)
+ for (i = 0; i < p->channel_count; i++)
dma->map |= 1 << p->channels[i];
dma->flags = dma_flags(p->type, p->bus_master, p->transfer);
pnp_register_dma_resource(option, dma);
- return;
}
-
static void pnpacpi_parse_irq_option(struct pnp_option *option,
- struct acpi_resource_irq *p)
+ struct acpi_resource_irq *p)
{
int i;
struct pnp_irq *irq;
if (!irq)
return;
- for(i = 0; i < p->interrupt_count; i++)
+ for (i = 0; i < p->interrupt_count; i++)
if (p->interrupts[i])
__set_bit(p->interrupts[i], irq->map);
irq->flags = irq_flags(p->triggering, p->polarity);
pnp_register_irq_resource(option, irq);
- return;
}
static void pnpacpi_parse_ext_irq_option(struct pnp_option *option,
- struct acpi_resource_extended_irq *p)
+ struct acpi_resource_extended_irq *p)
{
int i;
struct pnp_irq *irq;
if (!irq)
return;
- for(i = 0; i < p->interrupt_count; i++)
+ for (i = 0; i < p->interrupt_count; i++)
if (p->interrupts[i])
__set_bit(p->interrupts[i], irq->map);
irq->flags = irq_flags(p->triggering, p->polarity);
pnp_register_irq_resource(option, irq);
- return;
}
-static void
-pnpacpi_parse_port_option(struct pnp_option *option,
- struct acpi_resource_io *io)
+static void pnpacpi_parse_port_option(struct pnp_option *option,
+ struct acpi_resource_io *io)
{
struct pnp_port *port;
port->align = io->alignment;
port->size = io->address_length;
port->flags = ACPI_DECODE_16 == io->io_decode ?
- PNP_PORT_FLAG_16BITADDR : 0;
+ PNP_PORT_FLAG_16BITADDR : 0;
pnp_register_port_resource(option, port);
- return;
}
-static void
-pnpacpi_parse_fixed_port_option(struct pnp_option *option,
- struct acpi_resource_fixed_io *io)
+static void pnpacpi_parse_fixed_port_option(struct pnp_option *option,
+ struct acpi_resource_fixed_io *io)
{
struct pnp_port *port;
port->align = 0;
port->flags = PNP_PORT_FLAG_FIXED;
pnp_register_port_resource(option, port);
- return;
}
-static void
-pnpacpi_parse_mem24_option(struct pnp_option *option,
- struct acpi_resource_memory24 *p)
+static void pnpacpi_parse_mem24_option(struct pnp_option *option,
+ struct acpi_resource_memory24 *p)
{
struct pnp_mem *mem;
mem->size = p->address_length;
mem->flags = (ACPI_READ_WRITE_MEMORY == p->write_protect) ?
- IORESOURCE_MEM_WRITEABLE : 0;
+ IORESOURCE_MEM_WRITEABLE : 0;
pnp_register_mem_resource(option, mem);
- return;
}
-static void
-pnpacpi_parse_mem32_option(struct pnp_option *option,
- struct acpi_resource_memory32 *p)
+static void pnpacpi_parse_mem32_option(struct pnp_option *option,
+ struct acpi_resource_memory32 *p)
{
struct pnp_mem *mem;
mem->size = p->address_length;
mem->flags = (ACPI_READ_WRITE_MEMORY == p->write_protect) ?
- IORESOURCE_MEM_WRITEABLE : 0;
+ IORESOURCE_MEM_WRITEABLE : 0;
pnp_register_mem_resource(option, mem);
- return;
}
-static void
-pnpacpi_parse_fixed_mem32_option(struct pnp_option *option,
- struct acpi_resource_fixed_memory32 *p)
+static void pnpacpi_parse_fixed_mem32_option(struct pnp_option *option,
+ struct acpi_resource_fixed_memory32 *p)
{
struct pnp_mem *mem;
mem->align = 0;
mem->flags = (ACPI_READ_WRITE_MEMORY == p->write_protect) ?
- IORESOURCE_MEM_WRITEABLE : 0;
+ IORESOURCE_MEM_WRITEABLE : 0;
pnp_register_mem_resource(option, mem);
- return;
}
-static void
-pnpacpi_parse_address_option(struct pnp_option *option, struct acpi_resource *r)
+static void pnpacpi_parse_address_option(struct pnp_option *option,
+ struct acpi_resource *r)
{
struct acpi_resource_address64 addr, *p = &addr;
acpi_status status;
status = acpi_resource_to_address64(r, p);
if (!ACPI_SUCCESS(status)) {
- pnp_warn("PnPACPI: failed to convert resource type %d", r->type);
+ pnp_warn("PnPACPI: failed to convert resource type %d",
+ r->type);
return;
}
mem->size = p->address_length;
mem->align = 0;
mem->flags = (p->info.mem.write_protect ==
- ACPI_READ_WRITE_MEMORY) ? IORESOURCE_MEM_WRITEABLE : 0;
+ ACPI_READ_WRITE_MEMORY) ? IORESOURCE_MEM_WRITEABLE
+ : 0;
pnp_register_mem_resource(option, mem);
} else if (p->resource_type == ACPI_IO_RANGE) {
port = kzalloc(sizeof(struct pnp_port), GFP_KERNEL);
};
static acpi_status pnpacpi_option_resource(struct acpi_resource *res,
- void *data)
+ void *data)
{
int priority = 0;
- struct acpipnp_parse_option_s *parse_data = (struct acpipnp_parse_option_s *)data;
+ struct acpipnp_parse_option_s *parse_data =
+ (struct acpipnp_parse_option_s *)data;
struct pnp_dev *dev = parse_data->dev;
struct pnp_option *option = parse_data->option;
switch (res->type) {
- case ACPI_RESOURCE_TYPE_IRQ:
- pnpacpi_parse_irq_option(option, &res->data.irq);
- break;
+ case ACPI_RESOURCE_TYPE_IRQ:
+ pnpacpi_parse_irq_option(option, &res->data.irq);
+ break;
- case ACPI_RESOURCE_TYPE_DMA:
- pnpacpi_parse_dma_option(option, &res->data.dma);
- break;
+ case ACPI_RESOURCE_TYPE_DMA:
+ pnpacpi_parse_dma_option(option, &res->data.dma);
+ break;
- case ACPI_RESOURCE_TYPE_START_DEPENDENT:
- switch (res->data.start_dpf.compatibility_priority) {
- case ACPI_GOOD_CONFIGURATION:
- priority = PNP_RES_PRIORITY_PREFERRED;
- break;
-
- case ACPI_ACCEPTABLE_CONFIGURATION:
- priority = PNP_RES_PRIORITY_ACCEPTABLE;
- break;
-
- case ACPI_SUB_OPTIMAL_CONFIGURATION:
- priority = PNP_RES_PRIORITY_FUNCTIONAL;
- break;
- default:
- priority = PNP_RES_PRIORITY_INVALID;
- break;
- }
- /* TBD: Considering performace/robustness bits */
- option = pnp_register_dependent_option(dev, priority);
- if (!option)
- return AE_ERROR;
- parse_data->option = option;
+ case ACPI_RESOURCE_TYPE_START_DEPENDENT:
+ switch (res->data.start_dpf.compatibility_priority) {
+ case ACPI_GOOD_CONFIGURATION:
+ priority = PNP_RES_PRIORITY_PREFERRED;
break;
- case ACPI_RESOURCE_TYPE_END_DEPENDENT:
- /*only one EndDependentFn is allowed*/
- if (!parse_data->option_independent) {
- pnp_warn("PnPACPI: more than one EndDependentFn");
- return AE_ERROR;
- }
- parse_data->option = parse_data->option_independent;
- parse_data->option_independent = NULL;
+ case ACPI_ACCEPTABLE_CONFIGURATION:
+ priority = PNP_RES_PRIORITY_ACCEPTABLE;
break;
- case ACPI_RESOURCE_TYPE_IO:
- pnpacpi_parse_port_option(option, &res->data.io);
+ case ACPI_SUB_OPTIMAL_CONFIGURATION:
+ priority = PNP_RES_PRIORITY_FUNCTIONAL;
break;
-
- case ACPI_RESOURCE_TYPE_FIXED_IO:
- pnpacpi_parse_fixed_port_option(option,
- &res->data.fixed_io);
+ default:
+ priority = PNP_RES_PRIORITY_INVALID;
break;
+ }
+ /* TBD: Consider performance/robustness bits */
+ option = pnp_register_dependent_option(dev, priority);
+ if (!option)
+ return AE_ERROR;
+ parse_data->option = option;
+ break;
- case ACPI_RESOURCE_TYPE_VENDOR:
- case ACPI_RESOURCE_TYPE_END_TAG:
- break;
+ case ACPI_RESOURCE_TYPE_END_DEPENDENT:
+ /*only one EndDependentFn is allowed */
+ if (!parse_data->option_independent) {
+ pnp_warn("PnPACPI: more than one EndDependentFn");
+ return AE_ERROR;
+ }
+ parse_data->option = parse_data->option_independent;
+ parse_data->option_independent = NULL;
+ break;
- case ACPI_RESOURCE_TYPE_MEMORY24:
- pnpacpi_parse_mem24_option(option, &res->data.memory24);
- break;
+ case ACPI_RESOURCE_TYPE_IO:
+ pnpacpi_parse_port_option(option, &res->data.io);
+ break;
- case ACPI_RESOURCE_TYPE_MEMORY32:
- pnpacpi_parse_mem32_option(option, &res->data.memory32);
- break;
+ case ACPI_RESOURCE_TYPE_FIXED_IO:
+ pnpacpi_parse_fixed_port_option(option, &res->data.fixed_io);
+ break;
- case ACPI_RESOURCE_TYPE_FIXED_MEMORY32:
- pnpacpi_parse_fixed_mem32_option(option,
- &res->data.fixed_memory32);
- break;
+ case ACPI_RESOURCE_TYPE_VENDOR:
+ case ACPI_RESOURCE_TYPE_END_TAG:
+ break;
- case ACPI_RESOURCE_TYPE_ADDRESS16:
- case ACPI_RESOURCE_TYPE_ADDRESS32:
- case ACPI_RESOURCE_TYPE_ADDRESS64:
- pnpacpi_parse_address_option(option, res);
- break;
+ case ACPI_RESOURCE_TYPE_MEMORY24:
+ pnpacpi_parse_mem24_option(option, &res->data.memory24);
+ break;
- case ACPI_RESOURCE_TYPE_EXTENDED_ADDRESS64:
- break;
+ case ACPI_RESOURCE_TYPE_MEMORY32:
+ pnpacpi_parse_mem32_option(option, &res->data.memory32);
+ break;
- case ACPI_RESOURCE_TYPE_EXTENDED_IRQ:
- pnpacpi_parse_ext_irq_option(option,
- &res->data.extended_irq);
- break;
+ case ACPI_RESOURCE_TYPE_FIXED_MEMORY32:
+ pnpacpi_parse_fixed_mem32_option(option,
+ &res->data.fixed_memory32);
+ break;
- case ACPI_RESOURCE_TYPE_GENERIC_REGISTER:
- break;
+ case ACPI_RESOURCE_TYPE_ADDRESS16:
+ case ACPI_RESOURCE_TYPE_ADDRESS32:
+ case ACPI_RESOURCE_TYPE_ADDRESS64:
+ pnpacpi_parse_address_option(option, res);
+ break;
- default:
- pnp_warn("PnPACPI: unknown resource type %d", res->type);
- return AE_ERROR;
+ case ACPI_RESOURCE_TYPE_EXTENDED_ADDRESS64:
+ break;
+
+ case ACPI_RESOURCE_TYPE_EXTENDED_IRQ:
+ pnpacpi_parse_ext_irq_option(option, &res->data.extended_irq);
+ break;
+
+ case ACPI_RESOURCE_TYPE_GENERIC_REGISTER:
+ break;
+
+ default:
+ pnp_warn("PnPACPI: unknown resource type %d", res->type);
+ return AE_ERROR;
}
return AE_OK;
}
acpi_status pnpacpi_parse_resource_option_data(acpi_handle handle,
- struct pnp_dev *dev)
+ struct pnp_dev * dev)
{
acpi_status status;
struct acpipnp_parse_option_s parse_data;
parse_data.option_independent = parse_data.option;
parse_data.dev = dev;
status = acpi_walk_resources(handle, METHOD_NAME__PRS,
- pnpacpi_option_resource, &parse_data);
+ pnpacpi_option_resource, &parse_data);
return status;
}
* Set resource
*/
static acpi_status pnpacpi_count_resources(struct acpi_resource *res,
- void *data)
+ void *data)
{
int *res_cnt = (int *)data;
}
int pnpacpi_build_resource_template(acpi_handle handle,
- struct acpi_buffer *buffer)
+ struct acpi_buffer *buffer)
{
struct acpi_resource *resource;
int res_cnt = 0;
acpi_status status;
status = acpi_walk_resources(handle, METHOD_NAME__CRS,
- pnpacpi_count_resources, &res_cnt);
+ pnpacpi_count_resources, &res_cnt);
if (ACPI_FAILURE(status)) {
pnp_err("Evaluate _CRS failed");
return -EINVAL;
pnp_dbg("Res cnt %d", res_cnt);
resource = (struct acpi_resource *)buffer->pointer;
status = acpi_walk_resources(handle, METHOD_NAME__CRS,
- pnpacpi_type_resources, &resource);
+ pnpacpi_type_resources, &resource);
if (ACPI_FAILURE(status)) {
kfree(buffer->pointer);
pnp_err("Evaluate _CRS failed");
}
static void pnpacpi_encode_irq(struct acpi_resource *resource,
- struct resource *p)
+ struct resource *p)
{
int triggering, polarity;
}
static void pnpacpi_encode_ext_irq(struct acpi_resource *resource,
- struct resource *p)
+ struct resource *p)
{
int triggering, polarity;
}
static void pnpacpi_encode_dma(struct acpi_resource *resource,
- struct resource *p)
+ struct resource *p)
{
/* Note: pnp_assign_dma will copy pnp_dma->flags into p->flags */
switch (p->flags & IORESOURCE_DMA_SPEED_MASK) {
- case IORESOURCE_DMA_TYPEA:
- resource->data.dma.type = ACPI_TYPE_A;
- break;
- case IORESOURCE_DMA_TYPEB:
- resource->data.dma.type = ACPI_TYPE_B;
- break;
- case IORESOURCE_DMA_TYPEF:
- resource->data.dma.type = ACPI_TYPE_F;
- break;
- default:
- resource->data.dma.type = ACPI_COMPATIBILITY;
+ case IORESOURCE_DMA_TYPEA:
+ resource->data.dma.type = ACPI_TYPE_A;
+ break;
+ case IORESOURCE_DMA_TYPEB:
+ resource->data.dma.type = ACPI_TYPE_B;
+ break;
+ case IORESOURCE_DMA_TYPEF:
+ resource->data.dma.type = ACPI_TYPE_F;
+ break;
+ default:
+ resource->data.dma.type = ACPI_COMPATIBILITY;
}
switch (p->flags & IORESOURCE_DMA_TYPE_MASK) {
- case IORESOURCE_DMA_8BIT:
- resource->data.dma.transfer = ACPI_TRANSFER_8;
- break;
- case IORESOURCE_DMA_8AND16BIT:
- resource->data.dma.transfer = ACPI_TRANSFER_8_16;
- break;
- default:
- resource->data.dma.transfer = ACPI_TRANSFER_16;
+ case IORESOURCE_DMA_8BIT:
+ resource->data.dma.transfer = ACPI_TRANSFER_8;
+ break;
+ case IORESOURCE_DMA_8AND16BIT:
+ resource->data.dma.transfer = ACPI_TRANSFER_8_16;
+ break;
+ default:
+ resource->data.dma.transfer = ACPI_TRANSFER_16;
}
resource->data.dma.bus_master = !!(p->flags & IORESOURCE_DMA_MASTER);
}
static void pnpacpi_encode_io(struct acpi_resource *resource,
- struct resource *p)
+ struct resource *p)
{
/* Note: pnp_assign_port will copy pnp_port->flags into p->flags */
- resource->data.io.io_decode = (p->flags & PNP_PORT_FLAG_16BITADDR)?
- ACPI_DECODE_16 : ACPI_DECODE_10;
+ resource->data.io.io_decode = (p->flags & PNP_PORT_FLAG_16BITADDR) ?
+ ACPI_DECODE_16 : ACPI_DECODE_10;
resource->data.io.minimum = p->start;
resource->data.io.maximum = p->end;
- resource->data.io.alignment = 0; /* Correct? */
+ resource->data.io.alignment = 0; /* Correct? */
resource->data.io.address_length = p->end - p->start + 1;
}
static void pnpacpi_encode_fixed_io(struct acpi_resource *resource,
- struct resource *p)
+ struct resource *p)
{
resource->data.fixed_io.address = p->start;
resource->data.fixed_io.address_length = p->end - p->start + 1;
}
static void pnpacpi_encode_mem24(struct acpi_resource *resource,
- struct resource *p)
+ struct resource *p)
{
/* Note: pnp_assign_mem will copy pnp_mem->flags into p->flags */
resource->data.memory24.write_protect =
- (p->flags & IORESOURCE_MEM_WRITEABLE) ?
- ACPI_READ_WRITE_MEMORY : ACPI_READ_ONLY_MEMORY;
+ (p->flags & IORESOURCE_MEM_WRITEABLE) ?
+ ACPI_READ_WRITE_MEMORY : ACPI_READ_ONLY_MEMORY;
resource->data.memory24.minimum = p->start;
resource->data.memory24.maximum = p->end;
resource->data.memory24.alignment = 0;
}
static void pnpacpi_encode_mem32(struct acpi_resource *resource,
- struct resource *p)
+ struct resource *p)
{
resource->data.memory32.write_protect =
- (p->flags & IORESOURCE_MEM_WRITEABLE) ?
- ACPI_READ_WRITE_MEMORY : ACPI_READ_ONLY_MEMORY;
+ (p->flags & IORESOURCE_MEM_WRITEABLE) ?
+ ACPI_READ_WRITE_MEMORY : ACPI_READ_ONLY_MEMORY;
resource->data.memory32.minimum = p->start;
resource->data.memory32.maximum = p->end;
resource->data.memory32.alignment = 0;
}
static void pnpacpi_encode_fixed_mem32(struct acpi_resource *resource,
- struct resource *p)
+ struct resource *p)
{
resource->data.fixed_memory32.write_protect =
- (p->flags & IORESOURCE_MEM_WRITEABLE) ?
- ACPI_READ_WRITE_MEMORY : ACPI_READ_ONLY_MEMORY;
+ (p->flags & IORESOURCE_MEM_WRITEABLE) ?
+ ACPI_READ_WRITE_MEMORY : ACPI_READ_ONLY_MEMORY;
resource->data.fixed_memory32.address = p->start;
resource->data.fixed_memory32.address_length = p->end - p->start + 1;
}
int pnpacpi_encode_resources(struct pnp_resource_table *res_table,
- struct acpi_buffer *buffer)
+ struct acpi_buffer *buffer)
{
int i = 0;
/* pnpacpi_build_resource_template allocates extra mem */
- int res_cnt = (buffer->length - 1)/sizeof(struct acpi_resource) - 1;
- struct acpi_resource *resource = (struct acpi_resource*)buffer->pointer;
+ int res_cnt = (buffer->length - 1) / sizeof(struct acpi_resource) - 1;
+ struct acpi_resource *resource =
+ (struct acpi_resource *)buffer->pointer;
int port = 0, irq = 0, dma = 0, mem = 0;
pnp_dbg("res cnt %d", res_cnt);
while (i < res_cnt) {
- switch(resource->type) {
+ switch (resource->type) {
case ACPI_RESOURCE_TYPE_IRQ:
pnp_dbg("Encode irq");
pnpacpi_encode_irq(resource,
- &res_table->irq_resource[irq]);
+ &res_table->irq_resource[irq]);
irq++;
break;
case ACPI_RESOURCE_TYPE_DMA:
pnp_dbg("Encode dma");
pnpacpi_encode_dma(resource,
- &res_table->dma_resource[dma]);
+ &res_table->dma_resource[dma]);
dma++;
break;
case ACPI_RESOURCE_TYPE_IO:
pnp_dbg("Encode io");
pnpacpi_encode_io(resource,
- &res_table->port_resource[port]);
+ &res_table->port_resource[port]);
port++;
break;
case ACPI_RESOURCE_TYPE_FIXED_IO:
pnp_dbg("Encode fixed io");
pnpacpi_encode_fixed_io(resource,
- &res_table->port_resource[port]);
+ &res_table->
+ port_resource[port]);
port++;
break;
case ACPI_RESOURCE_TYPE_MEMORY24:
pnp_dbg("Encode mem24");
pnpacpi_encode_mem24(resource,
- &res_table->mem_resource[mem]);
+ &res_table->mem_resource[mem]);
mem++;
break;
case ACPI_RESOURCE_TYPE_MEMORY32:
pnp_dbg("Encode mem32");
pnpacpi_encode_mem32(resource,
- &res_table->mem_resource[mem]);
+ &res_table->mem_resource[mem]);
mem++;
break;
case ACPI_RESOURCE_TYPE_FIXED_MEMORY32:
pnp_dbg("Encode fixed mem32");
pnpacpi_encode_fixed_mem32(resource,
- &res_table->mem_resource[mem]);
+ &res_table->
+ mem_resource[mem]);
mem++;
break;
case ACPI_RESOURCE_TYPE_EXTENDED_IRQ:
pnp_dbg("Encode ext irq");
pnpacpi_encode_ext_irq(resource,
- &res_table->irq_resource[irq]);
+ &res_table->irq_resource[irq]);
irq++;
break;
case ACPI_RESOURCE_TYPE_START_DEPENDENT:
case ACPI_RESOURCE_TYPE_ADDRESS64:
case ACPI_RESOURCE_TYPE_EXTENDED_ADDRESS64:
case ACPI_RESOURCE_TYPE_GENERIC_REGISTER:
- default: /* other type */
+ default: /* other type */
pnp_warn("unknown resource type %d", resource->type);
return -EINVAL;
}
/*
* bioscalls.c - the lowlevel layer of the PnPBIOS driver
- *
*/
#include <linux/types.h>
#include "pnpbios.h"
static struct {
- u16 offset;
- u16 segment;
+ u16 offset;
+ u16 segment;
} pnp_bios_callpoint;
-
/*
* These are some opcodes for a "static asmlinkage"
* As this code is *not* executed inside the linux kernel segment, but in a
asmlinkage void pnp_bios_callfunc(void);
-__asm__(
- ".text \n"
+__asm__(".text \n"
__ALIGN_STR "\n"
"pnp_bios_callfunc:\n"
" pushl %edx \n"
" lcallw *pnp_bios_callpoint\n"
" addl $16, %esp \n"
" lret \n"
- ".previous \n"
-);
+ ".previous \n");
#define Q2_SET_SEL(cpu, selname, address, size) \
do { \
static spinlock_t pnp_bios_lock;
-
/*
* Support Functions
*/
* PnP BIOSes are generally not terribly re-entrant.
* Also, don't rely on them to save everything correctly.
*/
- if(pnp_bios_is_utter_crap)
+ if (pnp_bios_is_utter_crap)
return PNP_FUNCTION_NOT_SUPPORTED;
cpu = get_cpu();
if (ts2_size)
Q2_SET_SEL(smp_processor_id(), PNP_TS2, ts2_base, ts2_size);
- __asm__ __volatile__(
- "pushl %%ebp\n\t"
- "pushl %%edi\n\t"
- "pushl %%esi\n\t"
- "pushl %%ds\n\t"
- "pushl %%es\n\t"
- "pushl %%fs\n\t"
- "pushl %%gs\n\t"
- "pushfl\n\t"
- "movl %%esp, pnp_bios_fault_esp\n\t"
- "movl $1f, pnp_bios_fault_eip\n\t"
- "lcall %5,%6\n\t"
- "1:popfl\n\t"
- "popl %%gs\n\t"
- "popl %%fs\n\t"
- "popl %%es\n\t"
- "popl %%ds\n\t"
- "popl %%esi\n\t"
- "popl %%edi\n\t"
- "popl %%ebp\n\t"
- : "=a" (status)
- : "0" ((func) | (((u32)arg1) << 16)),
- "b" ((arg2) | (((u32)arg3) << 16)),
- "c" ((arg4) | (((u32)arg5) << 16)),
- "d" ((arg6) | (((u32)arg7) << 16)),
- "i" (PNP_CS32),
- "i" (0)
- : "memory"
- );
+ __asm__ __volatile__("pushl %%ebp\n\t"
+ "pushl %%edi\n\t"
+ "pushl %%esi\n\t"
+ "pushl %%ds\n\t"
+ "pushl %%es\n\t"
+ "pushl %%fs\n\t"
+ "pushl %%gs\n\t"
+ "pushfl\n\t"
+ "movl %%esp, pnp_bios_fault_esp\n\t"
+ "movl $1f, pnp_bios_fault_eip\n\t"
+ "lcall %5,%6\n\t"
+ "1:popfl\n\t"
+ "popl %%gs\n\t"
+ "popl %%fs\n\t"
+ "popl %%es\n\t"
+ "popl %%ds\n\t"
+ "popl %%esi\n\t"
+ "popl %%edi\n\t"
+ "popl %%ebp\n\t":"=a"(status)
+ :"0"((func) | (((u32) arg1) << 16)),
+ "b"((arg2) | (((u32) arg3) << 16)),
+ "c"((arg4) | (((u32) arg5) << 16)),
+ "d"((arg6) | (((u32) arg7) << 16)),
+ "i"(PNP_CS32), "i"(0)
+ :"memory");
spin_unlock_irqrestore(&pnp_bios_lock, flags);
get_cpu_gdt_table(cpu)[0x40 / 8] = save_desc_40;
put_cpu();
/* If we get here and this is set then the PnP BIOS faulted on us. */
- if(pnp_bios_is_utter_crap)
- {
- printk(KERN_ERR "PnPBIOS: Warning! Your PnP BIOS caused a fatal error. Attempting to continue\n");
- printk(KERN_ERR "PnPBIOS: You may need to reboot with the \"pnpbios=off\" option to operate stably\n");
- printk(KERN_ERR "PnPBIOS: Check with your vendor for an updated BIOS\n");
+ if (pnp_bios_is_utter_crap) {
+ printk(KERN_ERR
+ "PnPBIOS: Warning! Your PnP BIOS caused a fatal error. Attempting to continue\n");
+ printk(KERN_ERR
+ "PnPBIOS: You may need to reboot with the \"pnpbios=off\" option to operate stably\n");
+ printk(KERN_ERR
+ "PnPBIOS: Check with your vendor for an updated BIOS\n");
}
return status;
}
-void pnpbios_print_status(const char * module, u16 status)
+void pnpbios_print_status(const char *module, u16 status)
{
- switch(status) {
+ switch (status) {
case PNP_SUCCESS:
printk(KERN_ERR "PnPBIOS: %s: function successful\n", module);
break;
case PNP_NOT_SET_STATICALLY:
- printk(KERN_ERR "PnPBIOS: %s: unable to set static resources\n", module);
+ printk(KERN_ERR "PnPBIOS: %s: unable to set static resources\n",
+ module);
break;
case PNP_UNKNOWN_FUNCTION:
- printk(KERN_ERR "PnPBIOS: %s: invalid function number passed\n", module);
+ printk(KERN_ERR "PnPBIOS: %s: invalid function number passed\n",
+ module);
break;
case PNP_FUNCTION_NOT_SUPPORTED:
- printk(KERN_ERR "PnPBIOS: %s: function not supported on this system\n", module);
+ printk(KERN_ERR
+ "PnPBIOS: %s: function not supported on this system\n",
+ module);
break;
case PNP_INVALID_HANDLE:
printk(KERN_ERR "PnPBIOS: %s: invalid handle\n", module);
break;
case PNP_BAD_PARAMETER:
- printk(KERN_ERR "PnPBIOS: %s: invalid parameters were passed\n", module);
+ printk(KERN_ERR "PnPBIOS: %s: invalid parameters were passed\n",
+ module);
break;
case PNP_SET_FAILED:
- printk(KERN_ERR "PnPBIOS: %s: unable to set resources\n", module);
+ printk(KERN_ERR "PnPBIOS: %s: unable to set resources\n",
+ module);
break;
case PNP_EVENTS_NOT_PENDING:
printk(KERN_ERR "PnPBIOS: %s: no events are pending\n", module);
break;
case PNP_SYSTEM_NOT_DOCKED:
- printk(KERN_ERR "PnPBIOS: %s: the system is not docked\n", module);
+ printk(KERN_ERR "PnPBIOS: %s: the system is not docked\n",
+ module);
break;
case PNP_NO_ISA_PNP_CARDS:
- printk(KERN_ERR "PnPBIOS: %s: no isapnp cards are installed on this system\n", module);
+ printk(KERN_ERR
+ "PnPBIOS: %s: no isapnp cards are installed on this system\n",
+ module);
break;
case PNP_UNABLE_TO_DETERMINE_DOCK_CAPABILITIES:
- printk(KERN_ERR "PnPBIOS: %s: cannot determine the capabilities of the docking station\n", module);
+ printk(KERN_ERR
+ "PnPBIOS: %s: cannot determine the capabilities of the docking station\n",
+ module);
break;
case PNP_CONFIG_CHANGE_FAILED_NO_BATTERY:
- printk(KERN_ERR "PnPBIOS: %s: unable to undock, the system does not have a battery\n", module);
+ printk(KERN_ERR
+ "PnPBIOS: %s: unable to undock, the system does not have a battery\n",
+ module);
break;
case PNP_CONFIG_CHANGE_FAILED_RESOURCE_CONFLICT:
- printk(KERN_ERR "PnPBIOS: %s: could not dock due to resource conflicts\n", module);
+ printk(KERN_ERR
+ "PnPBIOS: %s: could not dock due to resource conflicts\n",
+ module);
break;
case PNP_BUFFER_TOO_SMALL:
- printk(KERN_ERR "PnPBIOS: %s: the buffer passed is too small\n", module);
+ printk(KERN_ERR "PnPBIOS: %s: the buffer passed is too small\n",
+ module);
break;
case PNP_USE_ESCD_SUPPORT:
printk(KERN_ERR "PnPBIOS: %s: use ESCD instead\n", module);
break;
case PNP_MESSAGE_NOT_SUPPORTED:
- printk(KERN_ERR "PnPBIOS: %s: the message is unsupported\n", module);
+ printk(KERN_ERR "PnPBIOS: %s: the message is unsupported\n",
+ module);
break;
case PNP_HARDWARE_ERROR:
- printk(KERN_ERR "PnPBIOS: %s: a hardware failure has occured\n", module);
+ printk(KERN_ERR "PnPBIOS: %s: a hardware failure has occured\n",
+ module);
break;
default:
- printk(KERN_ERR "PnPBIOS: %s: unexpected status 0x%x\n", module, status);
+ printk(KERN_ERR "PnPBIOS: %s: unexpected status 0x%x\n", module,
+ status);
break;
}
}
-
/*
* PnP BIOS Low Level Calls
*/
static int __pnp_bios_dev_node_info(struct pnp_dev_node_info *data)
{
u16 status;
+
if (!pnp_bios_present())
return PNP_FUNCTION_NOT_SUPPORTED;
- status = call_pnp_bios(PNP_GET_NUM_SYS_DEV_NODES, 0, PNP_TS1, 2, PNP_TS1, PNP_DS, 0, 0,
- data, sizeof(struct pnp_dev_node_info), NULL, 0);
+ status = call_pnp_bios(PNP_GET_NUM_SYS_DEV_NODES, 0, PNP_TS1, 2,
+ PNP_TS1, PNP_DS, 0, 0, data,
+ sizeof(struct pnp_dev_node_info), NULL, 0);
data->no_nodes &= 0xff;
return status;
}
int pnp_bios_dev_node_info(struct pnp_dev_node_info *data)
{
- int status = __pnp_bios_dev_node_info( data );
- if ( status )
- pnpbios_print_status( "dev_node_info", status );
+ int status = __pnp_bios_dev_node_info(data);
+
+ if (status)
+ pnpbios_print_status("dev_node_info", status);
return status;
}
* or volatile current (0) config
* Output: *nodenum=next node or 0xff if no more nodes
*/
-static int __pnp_bios_get_dev_node(u8 *nodenum, char boot, struct pnp_bios_node *data)
+static int __pnp_bios_get_dev_node(u8 *nodenum, char boot,
+ struct pnp_bios_node *data)
{
u16 status;
u16 tmp_nodenum;
+
if (!pnp_bios_present())
return PNP_FUNCTION_NOT_SUPPORTED;
- if ( !boot && pnpbios_dont_use_current_config )
+ if (!boot && pnpbios_dont_use_current_config)
return PNP_FUNCTION_NOT_SUPPORTED;
tmp_nodenum = *nodenum;
- status = call_pnp_bios(PNP_GET_SYS_DEV_NODE, 0, PNP_TS1, 0, PNP_TS2, boot ? 2 : 1, PNP_DS, 0,
- &tmp_nodenum, sizeof(tmp_nodenum), data, 65536);
+ status = call_pnp_bios(PNP_GET_SYS_DEV_NODE, 0, PNP_TS1, 0, PNP_TS2,
+ boot ? 2 : 1, PNP_DS, 0, &tmp_nodenum,
+ sizeof(tmp_nodenum), data, 65536);
*nodenum = tmp_nodenum;
return status;
}
int pnp_bios_get_dev_node(u8 *nodenum, char boot, struct pnp_bios_node *data)
{
int status;
- status = __pnp_bios_get_dev_node( nodenum, boot, data );
- if ( status )
- pnpbios_print_status( "get_dev_node", status );
+
+ status = __pnp_bios_get_dev_node(nodenum, boot, data);
+ if (status)
+ pnpbios_print_status("get_dev_node", status);
return status;
}
-
/*
* Call PnP BIOS with function 0x02, "set system device node"
* Input: *nodenum = desired node,
* boot = whether to set nonvolatile boot (!=0)
* or volatile current (0) config
*/
-static int __pnp_bios_set_dev_node(u8 nodenum, char boot, struct pnp_bios_node *data)
+static int __pnp_bios_set_dev_node(u8 nodenum, char boot,
+ struct pnp_bios_node *data)
{
u16 status;
+
if (!pnp_bios_present())
return PNP_FUNCTION_NOT_SUPPORTED;
- if ( !boot && pnpbios_dont_use_current_config )
+ if (!boot && pnpbios_dont_use_current_config)
return PNP_FUNCTION_NOT_SUPPORTED;
- status = call_pnp_bios(PNP_SET_SYS_DEV_NODE, nodenum, 0, PNP_TS1, boot ? 2 : 1, PNP_DS, 0, 0,
- data, 65536, NULL, 0);
+ status = call_pnp_bios(PNP_SET_SYS_DEV_NODE, nodenum, 0, PNP_TS1,
+ boot ? 2 : 1, PNP_DS, 0, 0, data, 65536, NULL,
+ 0);
return status;
}
int pnp_bios_set_dev_node(u8 nodenum, char boot, struct pnp_bios_node *data)
{
int status;
- status = __pnp_bios_set_dev_node( nodenum, boot, data );
- if ( status ) {
- pnpbios_print_status( "set_dev_node", status );
+
+ status = __pnp_bios_set_dev_node(nodenum, boot, data);
+ if (status) {
+ pnpbios_print_status("set_dev_node", status);
return status;
}
- if ( !boot ) { /* Update devlist */
- status = pnp_bios_get_dev_node( &nodenum, boot, data );
- if ( status )
+ if (!boot) { /* Update devlist */
+ status = pnp_bios_get_dev_node(&nodenum, boot, data);
+ if (status)
return status;
}
return status;
}
-#if needed
-/*
- * Call PnP BIOS with function 0x03, "get event"
- */
-static int pnp_bios_get_event(u16 *event)
-{
- u16 status;
- if (!pnp_bios_present())
- return PNP_FUNCTION_NOT_SUPPORTED;
- status = call_pnp_bios(PNP_GET_EVENT, 0, PNP_TS1, PNP_DS, 0, 0 ,0 ,0,
- event, sizeof(u16), NULL, 0);
- return status;
-}
-#endif
-
-#if needed
-/*
- * Call PnP BIOS with function 0x04, "send message"
- */
-static int pnp_bios_send_message(u16 message)
-{
- u16 status;
- if (!pnp_bios_present())
- return PNP_FUNCTION_NOT_SUPPORTED;
- status = call_pnp_bios(PNP_SEND_MESSAGE, message, PNP_DS, 0, 0, 0, 0, 0, 0, 0, 0, 0);
- return status;
-}
-#endif
-
/*
* Call PnP BIOS with function 0x05, "get docking station information"
*/
int pnp_bios_dock_station_info(struct pnp_docking_station_info *data)
{
u16 status;
- if (!pnp_bios_present())
- return PNP_FUNCTION_NOT_SUPPORTED;
- status = call_pnp_bios(PNP_GET_DOCKING_STATION_INFORMATION, 0, PNP_TS1, PNP_DS, 0, 0, 0, 0,
- data, sizeof(struct pnp_docking_station_info), NULL, 0);
- return status;
-}
-#if needed
-/*
- * Call PnP BIOS with function 0x09, "set statically allocated resource
- * information"
- */
-static int pnp_bios_set_stat_res(char *info)
-{
- u16 status;
if (!pnp_bios_present())
return PNP_FUNCTION_NOT_SUPPORTED;
- status = call_pnp_bios(PNP_SET_STATIC_ALLOCED_RES_INFO, 0, PNP_TS1, PNP_DS, 0, 0, 0, 0,
- info, *((u16 *) info), 0, 0);
+ status = call_pnp_bios(PNP_GET_DOCKING_STATION_INFORMATION, 0, PNP_TS1,
+ PNP_DS, 0, 0, 0, 0, data,
+ sizeof(struct pnp_docking_station_info), NULL,
+ 0);
return status;
}
-#endif
/*
* Call PnP BIOS with function 0x0a, "get statically allocated resource
static int __pnp_bios_get_stat_res(char *info)
{
u16 status;
+
if (!pnp_bios_present())
return PNP_FUNCTION_NOT_SUPPORTED;
- status = call_pnp_bios(PNP_GET_STATIC_ALLOCED_RES_INFO, 0, PNP_TS1, PNP_DS, 0, 0, 0, 0,
- info, 65536, NULL, 0);
+ status = call_pnp_bios(PNP_GET_STATIC_ALLOCED_RES_INFO, 0, PNP_TS1,
+ PNP_DS, 0, 0, 0, 0, info, 65536, NULL, 0);
return status;
}
int pnp_bios_get_stat_res(char *info)
{
int status;
- status = __pnp_bios_get_stat_res( info );
- if ( status )
- pnpbios_print_status( "get_stat_res", status );
- return status;
-}
-#if needed
-/*
- * Call PnP BIOS with function 0x0b, "get APM id table"
- */
-static int pnp_bios_apm_id_table(char *table, u16 *size)
-{
- u16 status;
- if (!pnp_bios_present())
- return PNP_FUNCTION_NOT_SUPPORTED;
- status = call_pnp_bios(PNP_GET_APM_ID_TABLE, 0, PNP_TS2, 0, PNP_TS1, PNP_DS, 0, 0,
- table, *size, size, sizeof(u16));
+ status = __pnp_bios_get_stat_res(info);
+ if (status)
+ pnpbios_print_status("get_stat_res", status);
return status;
}
-#endif
/*
* Call PnP BIOS with function 0x40, "get isa pnp configuration structure"
static int __pnp_bios_isapnp_config(struct pnp_isa_config_struc *data)
{
u16 status;
+
if (!pnp_bios_present())
return PNP_FUNCTION_NOT_SUPPORTED;
- status = call_pnp_bios(PNP_GET_PNP_ISA_CONFIG_STRUC, 0, PNP_TS1, PNP_DS, 0, 0, 0, 0,
- data, sizeof(struct pnp_isa_config_struc), NULL, 0);
+ status = call_pnp_bios(PNP_GET_PNP_ISA_CONFIG_STRUC, 0, PNP_TS1, PNP_DS,
+ 0, 0, 0, 0, data,
+ sizeof(struct pnp_isa_config_struc), NULL, 0);
return status;
}
int pnp_bios_isapnp_config(struct pnp_isa_config_struc *data)
{
int status;
- status = __pnp_bios_isapnp_config( data );
- if ( status )
- pnpbios_print_status( "isapnp_config", status );
+
+ status = __pnp_bios_isapnp_config(data);
+ if (status)
+ pnpbios_print_status("isapnp_config", status);
return status;
}
static int __pnp_bios_escd_info(struct escd_info_struc *data)
{
u16 status;
+
if (!pnp_bios_present())
return ESCD_FUNCTION_NOT_SUPPORTED;
- status = call_pnp_bios(PNP_GET_ESCD_INFO, 0, PNP_TS1, 2, PNP_TS1, 4, PNP_TS1, PNP_DS,
- data, sizeof(struct escd_info_struc), NULL, 0);
+ status = call_pnp_bios(PNP_GET_ESCD_INFO, 0, PNP_TS1, 2, PNP_TS1, 4,
+ PNP_TS1, PNP_DS, data,
+ sizeof(struct escd_info_struc), NULL, 0);
return status;
}
int pnp_bios_escd_info(struct escd_info_struc *data)
{
int status;
- status = __pnp_bios_escd_info( data );
- if ( status )
- pnpbios_print_status( "escd_info", status );
+
+ status = __pnp_bios_escd_info(data);
+ if (status)
+ pnpbios_print_status("escd_info", status);
return status;
}
static int __pnp_bios_read_escd(char *data, u32 nvram_base)
{
u16 status;
+
if (!pnp_bios_present())
return ESCD_FUNCTION_NOT_SUPPORTED;
- status = call_pnp_bios(PNP_READ_ESCD, 0, PNP_TS1, PNP_TS2, PNP_DS, 0, 0, 0,
- data, 65536, __va(nvram_base), 65536);
+ status = call_pnp_bios(PNP_READ_ESCD, 0, PNP_TS1, PNP_TS2, PNP_DS, 0, 0,
+ 0, data, 65536, __va(nvram_base), 65536);
return status;
}
int pnp_bios_read_escd(char *data, u32 nvram_base)
{
int status;
- status = __pnp_bios_read_escd( data, nvram_base );
- if ( status )
- pnpbios_print_status( "read_escd", status );
- return status;
-}
-#if needed
-/*
- * Call PnP BIOS function 0x43, "write ESCD"
- */
-static int pnp_bios_write_escd(char *data, u32 nvram_base)
-{
- u16 status;
- if (!pnp_bios_present())
- return ESCD_FUNCTION_NOT_SUPPORTED;
- status = call_pnp_bios(PNP_WRITE_ESCD, 0, PNP_TS1, PNP_TS2, PNP_DS, 0, 0, 0,
- data, 65536, __va(nvram_base), 65536);
+ status = __pnp_bios_read_escd(data, nvram_base);
+ if (status)
+ pnpbios_print_status("read_escd", status);
return status;
}
-#endif
-
-
-/*
- * Initialization
- */
void pnpbios_calls_init(union pnp_bios_install_struct *header)
{
int i;
+
spin_lock_init(&pnp_bios_lock);
pnp_bios_callpoint.offset = header->fields.pm16offset;
pnp_bios_callpoint.segment = PNP_CS16;
set_base(bad_bios_desc, __va((unsigned long)0x40 << 4));
_set_limit((char *)&bad_bios_desc, 4095 - (0x40 << 4));
- for (i = 0; i < NR_CPUS; i++) {
- struct desc_struct *gdt = get_cpu_gdt_table(i);
- if (!gdt)
- continue;
- set_base(gdt[GDT_ENTRY_PNPBIOS_CS32], &pnp_bios_callfunc);
- set_base(gdt[GDT_ENTRY_PNPBIOS_CS16], __va(header->fields.pm16cseg));
- set_base(gdt[GDT_ENTRY_PNPBIOS_DS], __va(header->fields.pm16dseg));
- }
+ for (i = 0; i < NR_CPUS; i++) {
+ struct desc_struct *gdt = get_cpu_gdt_table(i);
+ if (!gdt)
+ continue;
+ set_base(gdt[GDT_ENTRY_PNPBIOS_CS32], &pnp_bios_callfunc);
+ set_base(gdt[GDT_ENTRY_PNPBIOS_CS16],
+ __va(header->fields.pm16cseg));
+ set_base(gdt[GDT_ENTRY_PNPBIOS_DS],
+ __va(header->fields.pm16dseg));
+ }
}
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
-
+
/* Change Log
*
* Adam Belay - <ambx1@neo.rr.com> - March 16, 2003
#include "pnpbios.h"
-
/*
*
* PnP BIOS INTERFACE
*
*/
-static union pnp_bios_install_struct * pnp_bios_install = NULL;
+static union pnp_bios_install_struct *pnp_bios_install = NULL;
int pnp_bios_present(void)
{
/*
* (Much of this belongs in a shared routine somewhere)
*/
-
static int pnp_dock_event(int dock, struct pnp_docking_station_info *info)
{
- char *argv [3], **envp, *buf, *scratch;
+ char *argv[3], **envp, *buf, *scratch;
int i = 0, value;
- if (!current->fs->root) {
+ if (!current->fs->root)
return -EAGAIN;
- }
- if (!(envp = kcalloc(20, sizeof (char *), GFP_KERNEL))) {
+ if (!(envp = kcalloc(20, sizeof(char *), GFP_KERNEL)))
return -ENOMEM;
- }
if (!(buf = kzalloc(256, GFP_KERNEL))) {
- kfree (envp);
+ kfree(envp);
return -ENOMEM;
}
- /* FIXME: if there are actual users of this, it should be integrated into
- * the driver core and use the usual infrastructure like sysfs and uevents */
- argv [0] = "/sbin/pnpbios";
- argv [1] = "dock";
- argv [2] = NULL;
+ /* FIXME: if there are actual users of this, it should be
+ * integrated into the driver core and use the usual infrastructure
+ * like sysfs and uevents
+ */
+ argv[0] = "/sbin/pnpbios";
+ argv[1] = "dock";
+ argv[2] = NULL;
/* minimal command environment */
- envp [i++] = "HOME=/";
- envp [i++] = "PATH=/sbin:/bin:/usr/sbin:/usr/bin";
+ envp[i++] = "HOME=/";
+ envp[i++] = "PATH=/sbin:/bin:/usr/sbin:/usr/bin";
#ifdef DEBUG
/* hint that policy agent should enter no-stdout debug mode */
- envp [i++] = "DEBUG=kernel";
+ envp[i++] = "DEBUG=kernel";
#endif
/* extensible set of named bus-specific parameters,
* supporting multiple driver selection algorithms.
scratch = buf;
/* action: add, remove */
- envp [i++] = scratch;
- scratch += sprintf (scratch, "ACTION=%s", dock?"add":"remove") + 1;
+ envp[i++] = scratch;
+ scratch += sprintf(scratch, "ACTION=%s", dock ? "add" : "remove") + 1;
/* Report the ident for the dock */
- envp [i++] = scratch;
- scratch += sprintf (scratch, "DOCK=%x/%x/%x",
- info->location_id, info->serial, info->capabilities);
+ envp[i++] = scratch;
+ scratch += sprintf(scratch, "DOCK=%x/%x/%x",
+ info->location_id, info->serial, info->capabilities);
envp[i] = NULL;
-
- value = call_usermodehelper (argv [0], argv, envp, UMH_WAIT_EXEC);
- kfree (buf);
- kfree (envp);
+
+ value = call_usermodehelper(argv [0], argv, envp, UMH_WAIT_EXEC);
+ kfree(buf);
+ kfree(envp);
return 0;
}
/*
* Poll the PnP docking at regular intervals
*/
-static int pnp_dock_thread(void * unused)
+static int pnp_dock_thread(void *unused)
{
static struct pnp_docking_station_info now;
int docked = -1, d = 0;
+
set_freezable();
- while (!unloading)
- {
+ while (!unloading) {
int status;
-
+
/*
* Poll every 2 seconds
*/
status = pnp_bios_dock_station_info(&now);
- switch(status)
- {
+ switch (status) {
/*
* No dock to manage
*/
- case PNP_FUNCTION_NOT_SUPPORTED:
- complete_and_exit(&unload_sem, 0);
- case PNP_SYSTEM_NOT_DOCKED:
- d = 0;
- break;
- case PNP_SUCCESS:
- d = 1;
- break;
- default:
- pnpbios_print_status( "pnp_dock_thread", status );
- continue;
+ case PNP_FUNCTION_NOT_SUPPORTED:
+ complete_and_exit(&unload_sem, 0);
+ case PNP_SYSTEM_NOT_DOCKED:
+ d = 0;
+ break;
+ case PNP_SUCCESS:
+ d = 1;
+ break;
+ default:
+ pnpbios_print_status("pnp_dock_thread", status);
+ continue;
}
- if(d != docked)
- {
- if(pnp_dock_event(d, &now)==0)
- {
+ if (d != docked) {
+ if (pnp_dock_event(d, &now) == 0) {
docked = d;
#if 0
- printk(KERN_INFO "PnPBIOS: Docking station %stached\n", docked?"at":"de");
+ printk(KERN_INFO
+ "PnPBIOS: Docking station %stached\n",
+ docked ? "at" : "de");
#endif
}
}
complete_and_exit(&unload_sem, 0);
}
-#endif /* CONFIG_HOTPLUG */
+#endif /* CONFIG_HOTPLUG */
-static int pnpbios_get_resources(struct pnp_dev * dev, struct pnp_resource_table * res)
+static int pnpbios_get_resources(struct pnp_dev *dev,
+ struct pnp_resource_table *res)
{
u8 nodenum = dev->number;
- struct pnp_bios_node * node;
+ struct pnp_bios_node *node;
- /* just in case */
- if(!pnpbios_is_dynamic(dev))
+ if (!pnpbios_is_dynamic(dev))
return -EPERM;
node = kzalloc(node_info.max_node_size, GFP_KERNEL);
if (!node)
return -1;
- if (pnp_bios_get_dev_node(&nodenum, (char )PNPMODE_DYNAMIC, node)) {
+ if (pnp_bios_get_dev_node(&nodenum, (char)PNPMODE_DYNAMIC, node)) {
kfree(node);
return -ENODEV;
}
return 0;
}
-static int pnpbios_set_resources(struct pnp_dev * dev, struct pnp_resource_table * res)
+static int pnpbios_set_resources(struct pnp_dev *dev,
+ struct pnp_resource_table *res)
{
u8 nodenum = dev->number;
- struct pnp_bios_node * node;
+ struct pnp_bios_node *node;
int ret;
- /* just in case */
if (!pnpbios_is_dynamic(dev))
return -EPERM;
node = kzalloc(node_info.max_node_size, GFP_KERNEL);
if (!node)
return -1;
- if (pnp_bios_get_dev_node(&nodenum, (char )PNPMODE_DYNAMIC, node)) {
+ if (pnp_bios_get_dev_node(&nodenum, (char)PNPMODE_DYNAMIC, node)) {
kfree(node);
return -ENODEV;
}
- if(pnpbios_write_resources_to_node(res, node)<0) {
+ if (pnpbios_write_resources_to_node(res, node) < 0) {
kfree(node);
return -1;
}
return ret;
}
-static void pnpbios_zero_data_stream(struct pnp_bios_node * node)
+static void pnpbios_zero_data_stream(struct pnp_bios_node *node)
{
- unsigned char * p = (char *)node->data;
- unsigned char * end = (char *)(node->data + node->size);
+ unsigned char *p = (char *)node->data;
+ unsigned char *end = (char *)(node->data + node->size);
unsigned int len;
int i;
+
while ((char *)p < (char *)end) {
- if(p[0] & 0x80) { /* large tag */
+ if (p[0] & 0x80) { /* large tag */
len = (p[2] << 8) | p[1];
p += 3;
} else {
- if (((p[0]>>3) & 0x0f) == 0x0f)
+ if (((p[0] >> 3) & 0x0f) == 0x0f)
return;
len = p[0] & 0x07;
p += 1;
p[i] = 0;
p += len;
}
- printk(KERN_ERR "PnPBIOS: Resource structure did not contain an end tag.\n");
+ printk(KERN_ERR
+ "PnPBIOS: Resource structure did not contain an end tag.\n");
}
static int pnpbios_disable_resources(struct pnp_dev *dev)
{
- struct pnp_bios_node * node;
+ struct pnp_bios_node *node;
u8 nodenum = dev->number;
int ret;
- /* just in case */
- if(dev->flags & PNPBIOS_NO_DISABLE || !pnpbios_is_dynamic(dev))
+ if (dev->flags & PNPBIOS_NO_DISABLE || !pnpbios_is_dynamic(dev))
return -EPERM;
node = kzalloc(node_info.max_node_size, GFP_KERNEL);
if (!node)
return -ENOMEM;
- if (pnp_bios_get_dev_node(&nodenum, (char )PNPMODE_DYNAMIC, node)) {
+ if (pnp_bios_get_dev_node(&nodenum, (char)PNPMODE_DYNAMIC, node)) {
kfree(node);
return -ENODEV;
}
/* PnP Layer support */
struct pnp_protocol pnpbios_protocol = {
- .name = "Plug and Play BIOS",
- .get = pnpbios_get_resources,
- .set = pnpbios_set_resources,
+ .name = "Plug and Play BIOS",
+ .get = pnpbios_get_resources,
+ .set = pnpbios_set_resources,
.disable = pnpbios_disable_resources,
};
-static int insert_device(struct pnp_dev *dev, struct pnp_bios_node * node)
+static int insert_device(struct pnp_dev *dev, struct pnp_bios_node *node)
{
- struct list_head * pos;
- struct pnp_dev * pnp_dev;
+ struct list_head *pos;
+ struct pnp_dev *pnp_dev;
struct pnp_id *dev_id;
char id[8];
/* check if the device is already added */
dev->number = node->handle;
- list_for_each (pos, &pnpbios_protocol.devices){
+ list_for_each(pos, &pnpbios_protocol.devices) {
pnp_dev = list_entry(pos, struct pnp_dev, protocol_list);
if (dev->number == pnp_dev->number)
return -1;
dev_id = kzalloc(sizeof(struct pnp_id), GFP_KERNEL);
if (!dev_id)
return -1;
- pnpid32_to_pnpid(node->eisa_id,id);
- memcpy(dev_id->id,id,7);
+ pnpid32_to_pnpid(node->eisa_id, id);
+ memcpy(dev_id->id, id, 7);
pnp_add_id(dev_id, dev);
pnpbios_parse_data_stream(dev, node);
dev->active = pnp_is_active(dev);
if (!node)
return;
- for(nodenum=0; nodenum<0xff; ) {
+ for (nodenum = 0; nodenum < 0xff;) {
u8 thisnodenum = nodenum;
/* eventually we will want to use PNPMODE_STATIC here but for now
* dynamic will help us catch buggy bioses to add to the blacklist.
*/
if (!pnpbios_dont_use_current_config) {
- if (pnp_bios_get_dev_node(&nodenum, (char )PNPMODE_DYNAMIC, node))
+ if (pnp_bios_get_dev_node
+ (&nodenum, (char)PNPMODE_DYNAMIC, node))
break;
} else {
- if (pnp_bios_get_dev_node(&nodenum, (char )PNPMODE_STATIC, node))
+ if (pnp_bios_get_dev_node
+ (&nodenum, (char)PNPMODE_STATIC, node))
break;
}
nodes_got++;
- dev = kzalloc(sizeof (struct pnp_dev), GFP_KERNEL);
+ dev = kzalloc(sizeof(struct pnp_dev), GFP_KERNEL);
if (!dev)
break;
- if(insert_device(dev,node)<0)
+ if (insert_device(dev, node) < 0)
kfree(dev);
else
devs++;
if (nodenum <= thisnodenum) {
- printk(KERN_ERR "PnPBIOS: build_devlist: Node number 0x%x is out of sequence following node 0x%x. Aborting.\n", (unsigned int)nodenum, (unsigned int)thisnodenum);
+ printk(KERN_ERR
+ "PnPBIOS: build_devlist: Node number 0x%x is out of sequence following node 0x%x. Aborting.\n",
+ (unsigned int)nodenum,
+ (unsigned int)thisnodenum);
break;
}
}
kfree(node);
- printk(KERN_INFO "PnPBIOS: %i node%s reported by PnP BIOS; %i recorded by driver\n",
- nodes_got, nodes_got != 1 ? "s" : "", devs);
+ printk(KERN_INFO
+ "PnPBIOS: %i node%s reported by PnP BIOS; %i recorded by driver\n",
+ nodes_got, nodes_got != 1 ? "s" : "", devs);
}
/*
*
*/
-static int pnpbios_disabled; /* = 0 */
-int pnpbios_dont_use_current_config; /* = 0 */
+static int pnpbios_disabled;
+int pnpbios_dont_use_current_config;
#ifndef MODULE
static int __init pnpbios_setup(char *str)
while ((str != NULL) && (*str != '\0')) {
if (strncmp(str, "off", 3) == 0)
- pnpbios_disabled=1;
+ pnpbios_disabled = 1;
if (strncmp(str, "on", 2) == 0)
- pnpbios_disabled=0;
+ pnpbios_disabled = 0;
invert = (strncmp(str, "no-", 3) == 0);
if (invert)
str += 3;
printk(KERN_INFO "PnPBIOS: Scanning system for PnP BIOS support...\n");
/*
- * Search the defined area (0xf0000-0xffff0) for a valid PnP BIOS
+ * Search the defined area (0xf0000-0xffff0) for a valid PnP BIOS
* structure and, if one is found, sets up the selectors and
* entry points
*/
- for (check = (union pnp_bios_install_struct *) __va(0xf0000);
- check < (union pnp_bios_install_struct *) __va(0xffff0);
+ for (check = (union pnp_bios_install_struct *)__va(0xf0000);
+ check < (union pnp_bios_install_struct *)__va(0xffff0);
check = (void *)check + 16) {
if (check->fields.signature != PNP_SIGNATURE)
continue;
- printk(KERN_INFO "PnPBIOS: Found PnP BIOS installation structure at 0x%p\n", check);
+ printk(KERN_INFO
+ "PnPBIOS: Found PnP BIOS installation structure at 0x%p\n",
+ check);
length = check->fields.length;
if (!length) {
- printk(KERN_ERR "PnPBIOS: installation structure is invalid, skipping\n");
+ printk(KERN_ERR
+ "PnPBIOS: installation structure is invalid, skipping\n");
continue;
}
for (sum = 0, i = 0; i < length; i++)
sum += check->chars[i];
if (sum) {
- printk(KERN_ERR "PnPBIOS: installation structure is corrupted, skipping\n");
+ printk(KERN_ERR
+ "PnPBIOS: installation structure is corrupted, skipping\n");
continue;
}
if (check->fields.version < 0x10) {
- printk(KERN_WARNING "PnPBIOS: PnP BIOS version %d.%d is not supported\n",
+ printk(KERN_WARNING
+ "PnPBIOS: PnP BIOS version %d.%d is not supported\n",
check->fields.version >> 4,
check->fields.version & 15);
continue;
}
- printk(KERN_INFO "PnPBIOS: PnP BIOS version %d.%d, entry 0x%x:0x%x, dseg 0x%x\n",
- check->fields.version >> 4, check->fields.version & 15,
+ printk(KERN_INFO
+ "PnPBIOS: PnP BIOS version %d.%d, entry 0x%x:0x%x, dseg 0x%x\n",
+ check->fields.version >> 4, check->fields.version & 15,
check->fields.pm16cseg, check->fields.pm16offset,
check->fields.pm16dseg);
pnp_bios_install = check;
}
static struct dmi_system_id pnpbios_dmi_table[] __initdata = {
- { /* PnPBIOS GPF on boot */
- .callback = exploding_pnp_bios,
- .ident = "Higraded P14H",
- .matches = {
- DMI_MATCH(DMI_BIOS_VENDOR, "American Megatrends Inc."),
- DMI_MATCH(DMI_BIOS_VERSION, "07.00T"),
- DMI_MATCH(DMI_SYS_VENDOR, "Higraded"),
- DMI_MATCH(DMI_PRODUCT_NAME, "P14H"),
- },
- },
- { /* PnPBIOS GPF on boot */
- .callback = exploding_pnp_bios,
- .ident = "ASUS P4P800",
- .matches = {
- DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer Inc."),
- DMI_MATCH(DMI_BOARD_NAME, "P4P800"),
- },
- },
- { }
+ { /* PnPBIOS GPF on boot */
+ .callback = exploding_pnp_bios,
+ .ident = "Higraded P14H",
+ .matches = {
+ DMI_MATCH(DMI_BIOS_VENDOR, "American Megatrends Inc."),
+ DMI_MATCH(DMI_BIOS_VERSION, "07.00T"),
+ DMI_MATCH(DMI_SYS_VENDOR, "Higraded"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "P14H"),
+ },
+ },
+ { /* PnPBIOS GPF on boot */
+ .callback = exploding_pnp_bios,
+ .ident = "ASUS P4P800",
+ .matches = {
+ DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer Inc."),
+ DMI_MATCH(DMI_BOARD_NAME, "P4P800"),
+ },
+ },
+ {}
};
static int __init pnpbios_init(void)
printk(KERN_INFO "PnPBIOS: Disabled\n");
return -ENODEV;
}
-
#ifdef CONFIG_PNPACPI
if (!acpi_disabled && !pnpacpi_disabled) {
pnpbios_disabled = 1;
printk(KERN_INFO "PnPBIOS: Disabled by ACPI PNP\n");
return -ENODEV;
}
-#endif /* CONFIG_ACPI */
+#endif /* CONFIG_ACPI */
/* scan the system for pnpbios support */
if (!pnpbios_probe_system())
/* read the node info */
ret = pnp_bios_dev_node_info(&node_info);
if (ret) {
- printk(KERN_ERR "PnPBIOS: Unable to get node info. Aborting.\n");
+ printk(KERN_ERR
+ "PnPBIOS: Unable to get node info. Aborting.\n");
return ret;
}
/* register with the pnp layer */
ret = pnp_register_protocol(&pnpbios_protocol);
if (ret) {
- printk(KERN_ERR "PnPBIOS: Unable to register driver. Aborting.\n");
+ printk(KERN_ERR
+ "PnPBIOS: Unable to register driver. Aborting.\n");
return ret;
}
* The other files are human-readable.
*/
-//#include <pcmcia/config.h>
-//#include <pcmcia/k_compat.h>
-
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/slab.h>
static struct proc_dir_entry *proc_pnp_boot = NULL;
static int proc_read_pnpconfig(char *buf, char **start, off_t pos,
- int count, int *eof, void *data)
+ int count, int *eof, void *data)
{
struct pnp_isa_config_struc pnps;
if (pnp_bios_isapnp_config(&pnps))
return -EIO;
return snprintf(buf, count,
- "structure_revision %d\n"
- "number_of_CSNs %d\n"
- "ISA_read_data_port 0x%x\n",
- pnps.revision,
- pnps.no_csns,
- pnps.isa_rd_data_port
- );
+ "structure_revision %d\n"
+ "number_of_CSNs %d\n"
+ "ISA_read_data_port 0x%x\n",
+ pnps.revision, pnps.no_csns, pnps.isa_rd_data_port);
}
static int proc_read_escdinfo(char *buf, char **start, off_t pos,
- int count, int *eof, void *data)
+ int count, int *eof, void *data)
{
struct escd_info_struc escd;
if (pnp_bios_escd_info(&escd))
return -EIO;
return snprintf(buf, count,
- "min_ESCD_write_size %d\n"
- "ESCD_size %d\n"
- "NVRAM_base 0x%x\n",
- escd.min_escd_write_size,
- escd.escd_size,
- escd.nv_storage_base
- );
+ "min_ESCD_write_size %d\n"
+ "ESCD_size %d\n"
+ "NVRAM_base 0x%x\n",
+ escd.min_escd_write_size,
+ escd.escd_size, escd.nv_storage_base);
}
#define MAX_SANE_ESCD_SIZE (32*1024)
static int proc_read_escd(char *buf, char **start, off_t pos,
- int count, int *eof, void *data)
+ int count, int *eof, void *data)
{
struct escd_info_struc escd;
char *tmpbuf;
/* sanity check */
if (escd.escd_size > MAX_SANE_ESCD_SIZE) {
- printk(KERN_ERR "PnPBIOS: proc_read_escd: ESCD size reported by BIOS escd_info call is too great\n");
+ printk(KERN_ERR
+ "PnPBIOS: proc_read_escd: ESCD size reported by BIOS escd_info call is too great\n");
return -EFBIG;
}
tmpbuf = kzalloc(escd.escd_size, GFP_KERNEL);
- if (!tmpbuf) return -ENOMEM;
+ if (!tmpbuf)
+ return -ENOMEM;
if (pnp_bios_read_escd(tmpbuf, escd.nv_storage_base)) {
kfree(tmpbuf);
return -EIO;
}
- escd_size = (unsigned char)(tmpbuf[0]) + (unsigned char)(tmpbuf[1])*256;
+ escd_size =
+ (unsigned char)(tmpbuf[0]) + (unsigned char)(tmpbuf[1]) * 256;
/* sanity check */
if (escd_size > MAX_SANE_ESCD_SIZE) {
- printk(KERN_ERR "PnPBIOS: proc_read_escd: ESCD size reported by BIOS read_escd call is too great\n");
+ printk(KERN_ERR
+ "PnPBIOS: proc_read_escd: ESCD size reported by BIOS read_escd call is too great\n");
return -EFBIG;
}
escd_left_to_read = escd_size - pos;
- if (escd_left_to_read < 0) escd_left_to_read = 0;
- if (escd_left_to_read == 0) *eof = 1;
- n = min(count,escd_left_to_read);
+ if (escd_left_to_read < 0)
+ escd_left_to_read = 0;
+ if (escd_left_to_read == 0)
+ *eof = 1;
+ n = min(count, escd_left_to_read);
memcpy(buf, tmpbuf + pos, n);
kfree(tmpbuf);
*start = buf;
}
static int proc_read_legacyres(char *buf, char **start, off_t pos,
- int count, int *eof, void *data)
+ int count, int *eof, void *data)
{
/* Assume that the following won't overflow the buffer */
- if (pnp_bios_get_stat_res(buf))
+ if (pnp_bios_get_stat_res(buf))
return -EIO;
- return count; // FIXME: Return actual length
+ return count; // FIXME: Return actual length
}
static int proc_read_devices(char *buf, char **start, off_t pos,
- int count, int *eof, void *data)
+ int count, int *eof, void *data)
{
struct pnp_bios_node *node;
u8 nodenum;
return 0;
node = kzalloc(node_info.max_node_size, GFP_KERNEL);
- if (!node) return -ENOMEM;
+ if (!node)
+ return -ENOMEM;
- for (nodenum=pos; nodenum<0xff; ) {
+ for (nodenum = pos; nodenum < 0xff;) {
u8 thisnodenum = nodenum;
/* 26 = the number of characters per line sprintf'ed */
if ((p - buf + 26) > count)
node->type_code[0], node->type_code[1],
node->type_code[2], node->flags);
if (nodenum <= thisnodenum) {
- printk(KERN_ERR "%s Node number 0x%x is out of sequence following node 0x%x. Aborting.\n", "PnPBIOS: proc_read_devices:", (unsigned int)nodenum, (unsigned int)thisnodenum);
+ printk(KERN_ERR
+ "%s Node number 0x%x is out of sequence following node 0x%x. Aborting.\n",
+ "PnPBIOS: proc_read_devices:",
+ (unsigned int)nodenum,
+ (unsigned int)thisnodenum);
*eof = 1;
break;
}
kfree(node);
if (nodenum == 0xff)
*eof = 1;
- *start = (char *)((off_t)nodenum - pos);
+ *start = (char *)((off_t) nodenum - pos);
return p - buf;
}
static int proc_read_node(char *buf, char **start, off_t pos,
- int count, int *eof, void *data)
+ int count, int *eof, void *data)
{
struct pnp_bios_node *node;
int boot = (long)data >> 8;
int len;
node = kzalloc(node_info.max_node_size, GFP_KERNEL);
- if (!node) return -ENOMEM;
+ if (!node)
+ return -ENOMEM;
if (pnp_bios_get_dev_node(&nodenum, boot, node)) {
kfree(node);
return -EIO;
return len;
}
-static int proc_write_node(struct file *file, const char __user *buf,
- unsigned long count, void *data)
+static int proc_write_node(struct file *file, const char __user * buf,
+ unsigned long count, void *data)
{
struct pnp_bios_node *node;
int boot = (long)data >> 8;
goto out;
}
ret = count;
-out:
+ out:
kfree(node);
return ret;
}
-int pnpbios_interface_attach_device(struct pnp_bios_node * node)
+int pnpbios_interface_attach_device(struct pnp_bios_node *node)
{
char name[3];
struct proc_dir_entry *ent;
if (!proc_pnp)
return -EIO;
- if ( !pnpbios_dont_use_current_config ) {
+ if (!pnpbios_dont_use_current_config) {
ent = create_proc_entry(name, 0, proc_pnp);
if (ent) {
ent->read_proc = proc_read_node;
if (ent) {
ent->read_proc = proc_read_node;
ent->write_proc = proc_write_node;
- ent->data = (void *)(long)(node->handle+0x100);
+ ent->data = (void *)(long)(node->handle + 0x100);
return 0;
}
* work and the pnpbios_dont_use_current_config flag
* should already have been set to the appropriate value
*/
-int __init pnpbios_proc_init( void )
+int __init pnpbios_proc_init(void)
{
proc_pnp = proc_mkdir("pnp", proc_bus);
if (!proc_pnp)
if (!proc_pnp_boot)
return -EIO;
create_proc_read_entry("devices", 0, proc_pnp, proc_read_devices, NULL);
- create_proc_read_entry("configuration_info", 0, proc_pnp, proc_read_pnpconfig, NULL);
- create_proc_read_entry("escd_info", 0, proc_pnp, proc_read_escdinfo, NULL);
+ create_proc_read_entry("configuration_info", 0, proc_pnp,
+ proc_read_pnpconfig, NULL);
+ create_proc_read_entry("escd_info", 0, proc_pnp, proc_read_escdinfo,
+ NULL);
create_proc_read_entry("escd", S_IRUSR, proc_pnp, proc_read_escd, NULL);
- create_proc_read_entry("legacy_device_resources", 0, proc_pnp, proc_read_legacyres, NULL);
+ create_proc_read_entry("legacy_device_resources", 0, proc_pnp,
+ proc_read_legacyres, NULL);
return 0;
}
if (!proc_pnp)
return;
- for (i=0; i<0xff; i++) {
+ for (i = 0; i < 0xff; i++) {
sprintf(name, "%02x", i);
- if ( !pnpbios_dont_use_current_config )
+ if (!pnpbios_dont_use_current_config)
remove_proc_entry(name, proc_pnp);
remove_proc_entry(name, proc_pnp_boot);
}
remove_proc_entry("devices", proc_pnp);
remove_proc_entry("boot", proc_pnp);
remove_proc_entry("pnp", proc_bus);
-
- return;
}
/*
* rsparser.c - parses and encodes pnpbios resource data streams
- *
*/
#include <linux/ctype.h>
#ifdef CONFIG_PCI
#include <linux/pci.h>
#else
-inline void pcibios_penalize_isa_irq(int irq, int active) {}
-#endif /* CONFIG_PCI */
+inline void pcibios_penalize_isa_irq(int irq, int active)
+{
+}
+#endif /* CONFIG_PCI */
#include "pnpbios.h"
* Allocated Resources
*/
-static void
-pnpbios_parse_allocated_irqresource(struct pnp_resource_table * res, int irq)
+static void pnpbios_parse_allocated_irqresource(struct pnp_resource_table *res,
+ int irq)
{
int i = 0;
- while (!(res->irq_resource[i].flags & IORESOURCE_UNSET) && i < PNP_MAX_IRQ) i++;
+
+ while (!(res->irq_resource[i].flags & IORESOURCE_UNSET)
+ && i < PNP_MAX_IRQ)
+ i++;
if (i < PNP_MAX_IRQ) {
- res->irq_resource[i].flags = IORESOURCE_IRQ; // Also clears _UNSET flag
+ res->irq_resource[i].flags = IORESOURCE_IRQ; // Also clears _UNSET flag
if (irq == -1) {
res->irq_resource[i].flags |= IORESOURCE_DISABLED;
return;
}
res->irq_resource[i].start =
- res->irq_resource[i].end = (unsigned long) irq;
+ res->irq_resource[i].end = (unsigned long)irq;
pcibios_penalize_isa_irq(irq, 1);
}
}
-static void
-pnpbios_parse_allocated_dmaresource(struct pnp_resource_table * res, int dma)
+static void pnpbios_parse_allocated_dmaresource(struct pnp_resource_table *res,
+ int dma)
{
int i = 0;
+
while (i < PNP_MAX_DMA &&
- !(res->dma_resource[i].flags & IORESOURCE_UNSET))
+ !(res->dma_resource[i].flags & IORESOURCE_UNSET))
i++;
if (i < PNP_MAX_DMA) {
- res->dma_resource[i].flags = IORESOURCE_DMA; // Also clears _UNSET flag
+ res->dma_resource[i].flags = IORESOURCE_DMA; // Also clears _UNSET flag
if (dma == -1) {
res->dma_resource[i].flags |= IORESOURCE_DISABLED;
return;
}
res->dma_resource[i].start =
- res->dma_resource[i].end = (unsigned long) dma;
+ res->dma_resource[i].end = (unsigned long)dma;
}
}
-static void
-pnpbios_parse_allocated_ioresource(struct pnp_resource_table * res, int io, int len)
+static void pnpbios_parse_allocated_ioresource(struct pnp_resource_table *res,
+ int io, int len)
{
int i = 0;
- while (!(res->port_resource[i].flags & IORESOURCE_UNSET) && i < PNP_MAX_PORT) i++;
+
+ while (!(res->port_resource[i].flags & IORESOURCE_UNSET)
+ && i < PNP_MAX_PORT)
+ i++;
if (i < PNP_MAX_PORT) {
- res->port_resource[i].flags = IORESOURCE_IO; // Also clears _UNSET flag
- if (len <= 0 || (io + len -1) >= 0x10003) {
+ res->port_resource[i].flags = IORESOURCE_IO; // Also clears _UNSET flag
+ if (len <= 0 || (io + len - 1) >= 0x10003) {
res->port_resource[i].flags |= IORESOURCE_DISABLED;
return;
}
- res->port_resource[i].start = (unsigned long) io;
+ res->port_resource[i].start = (unsigned long)io;
res->port_resource[i].end = (unsigned long)(io + len - 1);
}
}
-static void
-pnpbios_parse_allocated_memresource(struct pnp_resource_table * res, int mem, int len)
+static void pnpbios_parse_allocated_memresource(struct pnp_resource_table *res,
+ int mem, int len)
{
int i = 0;
- while (!(res->mem_resource[i].flags & IORESOURCE_UNSET) && i < PNP_MAX_MEM) i++;
+
+ while (!(res->mem_resource[i].flags & IORESOURCE_UNSET)
+ && i < PNP_MAX_MEM)
+ i++;
if (i < PNP_MAX_MEM) {
- res->mem_resource[i].flags = IORESOURCE_MEM; // Also clears _UNSET flag
+ res->mem_resource[i].flags = IORESOURCE_MEM; // Also clears _UNSET flag
if (len <= 0) {
res->mem_resource[i].flags |= IORESOURCE_DISABLED;
return;
}
- res->mem_resource[i].start = (unsigned long) mem;
+ res->mem_resource[i].start = (unsigned long)mem;
res->mem_resource[i].end = (unsigned long)(mem + len - 1);
}
}
-static unsigned char *
-pnpbios_parse_allocated_resource_data(unsigned char * p, unsigned char * end, struct pnp_resource_table * res)
+static unsigned char *pnpbios_parse_allocated_resource_data(unsigned char *p,
+ unsigned char *end,
+ struct
+ pnp_resource_table
+ *res)
{
unsigned int len, tag;
int io, size, mask, i;
while ((char *)p < (char *)end) {
/* determine the type of tag */
- if (p[0] & LARGE_TAG) { /* large tag */
+ if (p[0] & LARGE_TAG) { /* large tag */
len = (p[2] << 8) | p[1];
tag = p[0];
- } else { /* small tag */
+ } else { /* small tag */
len = p[0] & 0x07;
- tag = ((p[0]>>3) & 0x0f);
+ tag = ((p[0] >> 3) & 0x0f);
}
switch (tag) {
case LARGE_TAG_MEM:
if (len != 9)
goto len_err;
- io = *(short *) &p[4];
- size = *(short *) &p[10];
+ io = *(short *)&p[4];
+ size = *(short *)&p[10];
pnpbios_parse_allocated_memresource(res, io, size);
break;
case LARGE_TAG_MEM32:
if (len != 17)
goto len_err;
- io = *(int *) &p[4];
- size = *(int *) &p[16];
+ io = *(int *)&p[4];
+ size = *(int *)&p[16];
pnpbios_parse_allocated_memresource(res, io, size);
break;
case LARGE_TAG_FIXEDMEM32:
if (len != 9)
goto len_err;
- io = *(int *) &p[4];
- size = *(int *) &p[8];
+ io = *(int *)&p[4];
+ size = *(int *)&p[8];
pnpbios_parse_allocated_memresource(res, io, size);
break;
if (len < 2 || len > 3)
goto len_err;
io = -1;
- mask= p[1] + p[2]*256;
- for (i=0;i<16;i++, mask=mask>>1)
- if(mask & 0x01) io=i;
+ mask = p[1] + p[2] * 256;
+ for (i = 0; i < 16; i++, mask = mask >> 1)
+ if (mask & 0x01)
+ io = i;
pnpbios_parse_allocated_irqresource(res, io);
break;
goto len_err;
io = -1;
mask = p[1];
- for (i=0;i<8;i++, mask = mask>>1)
- if(mask & 0x01) io=i;
+ for (i = 0; i < 8; i++, mask = mask >> 1)
+ if (mask & 0x01)
+ io = i;
pnpbios_parse_allocated_dmaresource(res, io);
break;
case SMALL_TAG_PORT:
if (len != 7)
goto len_err;
- io = p[2] + p[3] *256;
+ io = p[2] + p[3] * 256;
size = p[7];
pnpbios_parse_allocated_ioresource(res, io, size);
break;
case SMALL_TAG_END:
p = p + 2;
- return (unsigned char *)p;
+ return (unsigned char *)p;
break;
- default: /* an unkown tag */
- len_err:
- printk(KERN_ERR "PnPBIOS: Unknown tag '0x%x', length '%d'.\n", tag, len);
+ default: /* an unkown tag */
+ len_err:
+ printk(KERN_ERR
+ "PnPBIOS: Unknown tag '0x%x', length '%d'.\n",
+ tag, len);
break;
}
p += len + 1;
}
- printk(KERN_ERR "PnPBIOS: Resource structure does not contain an end tag.\n");
+ printk(KERN_ERR
+ "PnPBIOS: Resource structure does not contain an end tag.\n");
return NULL;
}
-
/*
* Resource Configuration Options
*/
-static void
-pnpbios_parse_mem_option(unsigned char *p, int size, struct pnp_option *option)
+static void pnpbios_parse_mem_option(unsigned char *p, int size,
+ struct pnp_option *option)
{
- struct pnp_mem * mem;
+ struct pnp_mem *mem;
+
mem = kzalloc(sizeof(struct pnp_mem), GFP_KERNEL);
if (!mem)
return;
mem->align = (p[9] << 8) | p[8];
mem->size = ((p[11] << 8) | p[10]) << 8;
mem->flags = p[3];
- pnp_register_mem_resource(option,mem);
- return;
+ pnp_register_mem_resource(option, mem);
}
-static void
-pnpbios_parse_mem32_option(unsigned char *p, int size, struct pnp_option *option)
+static void pnpbios_parse_mem32_option(unsigned char *p, int size,
+ struct pnp_option *option)
{
- struct pnp_mem * mem;
+ struct pnp_mem *mem;
+
mem = kzalloc(sizeof(struct pnp_mem), GFP_KERNEL);
if (!mem)
return;
mem->align = (p[15] << 24) | (p[14] << 16) | (p[13] << 8) | p[12];
mem->size = (p[19] << 24) | (p[18] << 16) | (p[17] << 8) | p[16];
mem->flags = p[3];
- pnp_register_mem_resource(option,mem);
- return;
+ pnp_register_mem_resource(option, mem);
}
-static void
-pnpbios_parse_fixed_mem32_option(unsigned char *p, int size, struct pnp_option *option)
+static void pnpbios_parse_fixed_mem32_option(unsigned char *p, int size,
+ struct pnp_option *option)
{
- struct pnp_mem * mem;
+ struct pnp_mem *mem;
mem = kzalloc(sizeof(struct pnp_mem), GFP_KERNEL);
if (!mem)
return;
mem->size = (p[11] << 24) | (p[10] << 16) | (p[9] << 8) | p[8];
mem->align = 0;
mem->flags = p[3];
- pnp_register_mem_resource(option,mem);
- return;
+ pnp_register_mem_resource(option, mem);
}
-static void
-pnpbios_parse_irq_option(unsigned char *p, int size, struct pnp_option *option)
+static void pnpbios_parse_irq_option(unsigned char *p, int size,
+ struct pnp_option *option)
{
- struct pnp_irq * irq;
+ struct pnp_irq *irq;
unsigned long bits;
irq = kzalloc(sizeof(struct pnp_irq), GFP_KERNEL);
irq->flags = p[3];
else
irq->flags = IORESOURCE_IRQ_HIGHEDGE;
- pnp_register_irq_resource(option,irq);
- return;
+ pnp_register_irq_resource(option, irq);
}
-static void
-pnpbios_parse_dma_option(unsigned char *p, int size, struct pnp_option *option)
+static void pnpbios_parse_dma_option(unsigned char *p, int size,
+ struct pnp_option *option)
{
- struct pnp_dma * dma;
+ struct pnp_dma *dma;
+
dma = kzalloc(sizeof(struct pnp_dma), GFP_KERNEL);
if (!dma)
return;
dma->map = p[1];
dma->flags = p[2];
- pnp_register_dma_resource(option,dma);
- return;
+ pnp_register_dma_resource(option, dma);
}
-static void
-pnpbios_parse_port_option(unsigned char *p, int size, struct pnp_option *option)
+static void pnpbios_parse_port_option(unsigned char *p, int size,
+ struct pnp_option *option)
{
- struct pnp_port * port;
+ struct pnp_port *port;
+
port = kzalloc(sizeof(struct pnp_port), GFP_KERNEL);
if (!port)
return;
port->align = p[6];
port->size = p[7];
port->flags = p[1] ? PNP_PORT_FLAG_16BITADDR : 0;
- pnp_register_port_resource(option,port);
- return;
+ pnp_register_port_resource(option, port);
}
-static void
-pnpbios_parse_fixed_port_option(unsigned char *p, int size, struct pnp_option *option)
+static void pnpbios_parse_fixed_port_option(unsigned char *p, int size,
+ struct pnp_option *option)
{
- struct pnp_port * port;
+ struct pnp_port *port;
+
port = kzalloc(sizeof(struct pnp_port), GFP_KERNEL);
if (!port)
return;
port->size = p[3];
port->align = 0;
port->flags = PNP_PORT_FLAG_FIXED;
- pnp_register_port_resource(option,port);
- return;
+ pnp_register_port_resource(option, port);
}
-static unsigned char *
-pnpbios_parse_resource_option_data(unsigned char * p, unsigned char * end, struct pnp_dev *dev)
+static unsigned char *pnpbios_parse_resource_option_data(unsigned char *p,
+ unsigned char *end,
+ struct pnp_dev *dev)
{
unsigned int len, tag;
int priority = 0;
while ((char *)p < (char *)end) {
/* determine the type of tag */
- if (p[0] & LARGE_TAG) { /* large tag */
+ if (p[0] & LARGE_TAG) { /* large tag */
len = (p[2] << 8) | p[1];
tag = p[0];
- } else { /* small tag */
+ } else { /* small tag */
len = p[0] & 0x07;
- tag = ((p[0]>>3) & 0x0f);
+ tag = ((p[0] >> 3) & 0x0f);
}
switch (tag) {
if (len != 0)
goto len_err;
if (option_independent == option)
- printk(KERN_WARNING "PnPBIOS: Missing SMALL_TAG_STARTDEP tag\n");
+ printk(KERN_WARNING
+ "PnPBIOS: Missing SMALL_TAG_STARTDEP tag\n");
option = option_independent;
break;
case SMALL_TAG_END:
- return p + 2;
+ return p + 2;
- default: /* an unkown tag */
- len_err:
- printk(KERN_ERR "PnPBIOS: Unknown tag '0x%x', length '%d'.\n", tag, len);
+ default: /* an unkown tag */
+ len_err:
+ printk(KERN_ERR
+ "PnPBIOS: Unknown tag '0x%x', length '%d'.\n",
+ tag, len);
break;
}
p += len + 1;
}
- printk(KERN_ERR "PnPBIOS: Resource structure does not contain an end tag.\n");
+ printk(KERN_ERR
+ "PnPBIOS: Resource structure does not contain an end tag.\n");
return NULL;
}
-
/*
* Compatible Device IDs
*/
#define HEX(id,a) hex[((id)>>a) & 15]
#define CHAR(id,a) (0x40 + (((id)>>a) & 31))
-//
void pnpid32_to_pnpid(u32 id, char *str)
{
id = be32_to_cpu(id);
str[0] = CHAR(id, 26);
str[1] = CHAR(id, 21);
- str[2] = CHAR(id,16);
+ str[2] = CHAR(id, 16);
str[3] = HEX(id, 12);
str[4] = HEX(id, 8);
str[5] = HEX(id, 4);
str[6] = HEX(id, 0);
str[7] = '\0';
-
- return;
}
-//
+
#undef CHAR
#undef HEX
-static unsigned char *
-pnpbios_parse_compatible_ids(unsigned char *p, unsigned char *end, struct pnp_dev *dev)
+static unsigned char *pnpbios_parse_compatible_ids(unsigned char *p,
+ unsigned char *end,
+ struct pnp_dev *dev)
{
int len, tag;
char id[8];
while ((char *)p < (char *)end) {
/* determine the type of tag */
- if (p[0] & LARGE_TAG) { /* large tag */
+ if (p[0] & LARGE_TAG) { /* large tag */
len = (p[2] << 8) | p[1];
tag = p[0];
- } else { /* small tag */
+ } else { /* small tag */
len = p[0] & 0x07;
- tag = ((p[0]>>3) & 0x0f);
+ tag = ((p[0] >> 3) & 0x0f);
}
switch (tag) {
case LARGE_TAG_ANSISTR:
- strncpy(dev->name, p + 3, len >= PNP_NAME_LEN ? PNP_NAME_LEN - 2 : len);
- dev->name[len >= PNP_NAME_LEN ? PNP_NAME_LEN - 1 : len] = '\0';
+ strncpy(dev->name, p + 3,
+ len >= PNP_NAME_LEN ? PNP_NAME_LEN - 2 : len);
+ dev->name[len >=
+ PNP_NAME_LEN ? PNP_NAME_LEN - 1 : len] = '\0';
break;
- case SMALL_TAG_COMPATDEVID: /* compatible ID */
+ case SMALL_TAG_COMPATDEVID: /* compatible ID */
if (len != 4)
goto len_err;
- dev_id = kzalloc(sizeof (struct pnp_id), GFP_KERNEL);
+ dev_id = kzalloc(sizeof(struct pnp_id), GFP_KERNEL);
if (!dev_id)
return NULL;
- pnpid32_to_pnpid(p[1] | p[2] << 8 | p[3] << 16 | p[4] << 24,id);
+ pnpid32_to_pnpid(p[1] | p[2] << 8 | p[3] << 16 | p[4] <<
+ 24, id);
memcpy(&dev_id->id, id, 7);
pnp_add_id(dev_id, dev);
break;
case SMALL_TAG_END:
p = p + 2;
- return (unsigned char *)p;
+ return (unsigned char *)p;
break;
- default: /* an unkown tag */
- len_err:
- printk(KERN_ERR "PnPBIOS: Unknown tag '0x%x', length '%d'.\n", tag, len);
+ default: /* an unkown tag */
+ len_err:
+ printk(KERN_ERR
+ "PnPBIOS: Unknown tag '0x%x', length '%d'.\n",
+ tag, len);
break;
}
p += len + 1;
}
- printk(KERN_ERR "PnPBIOS: Resource structure does not contain an end tag.\n");
+ printk(KERN_ERR
+ "PnPBIOS: Resource structure does not contain an end tag.\n");
return NULL;
}
-
/*
* Allocated Resource Encoding
*/
-static void pnpbios_encode_mem(unsigned char *p, struct resource * res)
+static void pnpbios_encode_mem(unsigned char *p, struct resource *res)
{
unsigned long base = res->start;
unsigned long len = res->end - res->start + 1;
+
p[4] = (base >> 8) & 0xff;
p[5] = ((base >> 8) >> 8) & 0xff;
p[6] = (base >> 8) & 0xff;
p[7] = ((base >> 8) >> 8) & 0xff;
p[10] = (len >> 8) & 0xff;
p[11] = ((len >> 8) >> 8) & 0xff;
- return;
}
-static void pnpbios_encode_mem32(unsigned char *p, struct resource * res)
+static void pnpbios_encode_mem32(unsigned char *p, struct resource *res)
{
unsigned long base = res->start;
unsigned long len = res->end - res->start + 1;
+
p[4] = base & 0xff;
p[5] = (base >> 8) & 0xff;
p[6] = (base >> 16) & 0xff;
p[17] = (len >> 8) & 0xff;
p[18] = (len >> 16) & 0xff;
p[19] = (len >> 24) & 0xff;
- return;
}
-static void pnpbios_encode_fixed_mem32(unsigned char *p, struct resource * res)
-{ unsigned long base = res->start;
+static void pnpbios_encode_fixed_mem32(unsigned char *p, struct resource *res)
+{
+ unsigned long base = res->start;
unsigned long len = res->end - res->start + 1;
+
p[4] = base & 0xff;
p[5] = (base >> 8) & 0xff;
p[6] = (base >> 16) & 0xff;
p[9] = (len >> 8) & 0xff;
p[10] = (len >> 16) & 0xff;
p[11] = (len >> 24) & 0xff;
- return;
}
-static void pnpbios_encode_irq(unsigned char *p, struct resource * res)
+static void pnpbios_encode_irq(unsigned char *p, struct resource *res)
{
unsigned long map = 0;
+
map = 1 << res->start;
p[1] = map & 0xff;
p[2] = (map >> 8) & 0xff;
- return;
}
-static void pnpbios_encode_dma(unsigned char *p, struct resource * res)
+static void pnpbios_encode_dma(unsigned char *p, struct resource *res)
{
unsigned long map = 0;
+
map = 1 << res->start;
p[1] = map & 0xff;
- return;
}
-static void pnpbios_encode_port(unsigned char *p, struct resource * res)
+static void pnpbios_encode_port(unsigned char *p, struct resource *res)
{
unsigned long base = res->start;
unsigned long len = res->end - res->start + 1;
+
p[2] = base & 0xff;
p[3] = (base >> 8) & 0xff;
p[4] = base & 0xff;
p[5] = (base >> 8) & 0xff;
p[7] = len & 0xff;
- return;
}
-static void pnpbios_encode_fixed_port(unsigned char *p, struct resource * res)
+static void pnpbios_encode_fixed_port(unsigned char *p, struct resource *res)
{
unsigned long base = res->start;
unsigned long len = res->end - res->start + 1;
+
p[1] = base & 0xff;
p[2] = (base >> 8) & 0xff;
p[3] = len & 0xff;
- return;
}
-static unsigned char *
-pnpbios_encode_allocated_resource_data(unsigned char * p, unsigned char * end, struct pnp_resource_table * res)
+static unsigned char *pnpbios_encode_allocated_resource_data(unsigned char *p,
+ unsigned char *end,
+ struct
+ pnp_resource_table
+ *res)
{
unsigned int len, tag;
int port = 0, irq = 0, dma = 0, mem = 0;
while ((char *)p < (char *)end) {
/* determine the type of tag */
- if (p[0] & LARGE_TAG) { /* large tag */
+ if (p[0] & LARGE_TAG) { /* large tag */
len = (p[2] << 8) | p[1];
tag = p[0];
- } else { /* small tag */
+ } else { /* small tag */
len = p[0] & 0x07;
- tag = ((p[0]>>3) & 0x0f);
+ tag = ((p[0] >> 3) & 0x0f);
}
switch (tag) {
case SMALL_TAG_END:
p = p + 2;
- return (unsigned char *)p;
+ return (unsigned char *)p;
break;
- default: /* an unkown tag */
- len_err:
- printk(KERN_ERR "PnPBIOS: Unknown tag '0x%x', length '%d'.\n", tag, len);
+ default: /* an unkown tag */
+ len_err:
+ printk(KERN_ERR
+ "PnPBIOS: Unknown tag '0x%x', length '%d'.\n",
+ tag, len);
break;
}
p += len + 1;
}
- printk(KERN_ERR "PnPBIOS: Resource structure does not contain an end tag.\n");
+ printk(KERN_ERR
+ "PnPBIOS: Resource structure does not contain an end tag.\n");
return NULL;
}
-
/*
* Core Parsing Functions
*/
-int
-pnpbios_parse_data_stream(struct pnp_dev *dev, struct pnp_bios_node * node)
+int pnpbios_parse_data_stream(struct pnp_dev *dev, struct pnp_bios_node *node)
{
- unsigned char * p = (char *)node->data;
- unsigned char * end = (char *)(node->data + node->size);
- p = pnpbios_parse_allocated_resource_data(p,end,&dev->res);
+ unsigned char *p = (char *)node->data;
+ unsigned char *end = (char *)(node->data + node->size);
+
+ p = pnpbios_parse_allocated_resource_data(p, end, &dev->res);
if (!p)
return -EIO;
- p = pnpbios_parse_resource_option_data(p,end,dev);
+ p = pnpbios_parse_resource_option_data(p, end, dev);
if (!p)
return -EIO;
- p = pnpbios_parse_compatible_ids(p,end,dev);
+ p = pnpbios_parse_compatible_ids(p, end, dev);
if (!p)
return -EIO;
return 0;
}
-int
-pnpbios_read_resources_from_node(struct pnp_resource_table *res,
- struct pnp_bios_node * node)
+int pnpbios_read_resources_from_node(struct pnp_resource_table *res,
+ struct pnp_bios_node *node)
{
- unsigned char * p = (char *)node->data;
- unsigned char * end = (char *)(node->data + node->size);
- p = pnpbios_parse_allocated_resource_data(p,end,res);
+ unsigned char *p = (char *)node->data;
+ unsigned char *end = (char *)(node->data + node->size);
+
+ p = pnpbios_parse_allocated_resource_data(p, end, res);
if (!p)
return -EIO;
return 0;
}
-int
-pnpbios_write_resources_to_node(struct pnp_resource_table *res,
- struct pnp_bios_node * node)
+int pnpbios_write_resources_to_node(struct pnp_resource_table *res,
+ struct pnp_bios_node *node)
{
- unsigned char * p = (char *)node->data;
- unsigned char * end = (char *)(node->data + node->size);
- p = pnpbios_encode_allocated_resource_data(p,end,res);
+ unsigned char *p = (char *)node->data;
+ unsigned char *end = (char *)(node->data + node->size);
+
+ p = pnpbios_encode_allocated_resource_data(p, end, res);
if (!p)
return -EIO;
return 0;
#include <linux/io.h>
#include "base.h"
-
static void quirk_awe32_resources(struct pnp_dev *dev)
{
struct pnp_port *port, *port2, *port3;
* two extra ports (at offset 0x400 and 0x800 from the one given) by
* hand.
*/
- for ( ; res ; res = res->next ) {
+ for (; res; res = res->next) {
port2 = pnp_alloc(sizeof(struct pnp_port));
if (!port2)
return;
struct pnp_option *res = dev->dependent;
unsigned long tmp;
- for ( ; res ; res = res->next ) {
+ for (; res; res = res->next) {
struct pnp_irq *irq;
struct pnp_dma *dma;
- for( irq = res->irq; irq; irq = irq->next ) { // Valid irqs are 5, 7, 10
+ for (irq = res->irq; irq; irq = irq->next) { // Valid irqs are 5, 7, 10
tmp = 0x04A0;
bitmap_copy(irq->map, &tmp, 16); // 0000 0100 1010 0000
}
- for( dma = res->dma; dma; dma = dma->next ) // Valid 8bit dma channels are 1,3
- if( ( dma->flags & IORESOURCE_DMA_TYPE_MASK ) == IORESOURCE_DMA_8BIT )
+ for (dma = res->dma; dma; dma = dma->next) // Valid 8bit dma channels are 1,3
+ if ((dma->flags & IORESOURCE_DMA_TYPE_MASK) ==
+ IORESOURCE_DMA_8BIT)
dma->map = 0x000A;
}
printk(KERN_INFO "pnp: CMI8330 quirk - fixing interrupts and dma\n");
{
struct pnp_port *port;
struct pnp_option *res = dev->dependent;
- int changed = 0;
+ int changed = 0;
/*
* The default range on the mpu port for these devices is 0x388-0x388.
* auto-configured.
*/
- for( ; res ; res = res->next ) {
+ for (; res; res = res->next) {
port = res->port;
- if(!port)
+ if (!port)
continue;
port = port->next;
- if(!port)
+ if (!port)
continue;
port = port->next;
- if(!port)
+ if (!port)
continue;
- if(port->min != port->max)
+ if (port->min != port->max)
continue;
port->max += 0x70;
changed = 1;
}
- if(changed)
- printk(KERN_INFO "pnp: SB audio device quirk - increasing port range\n");
- return;
+ if (changed)
+ printk(KERN_INFO
+ "pnp: SB audio device quirk - increasing port range\n");
}
static int quirk_smc_fir_enabled(struct pnp_dev *dev)
outb(bank, firbase + 7);
high = inb(firbase + 0);
- low = inb(firbase + 1);
+ low = inb(firbase + 1);
chip = inb(firbase + 2);
/* This corresponds to the check in smsc_ircc_present() */
*/
dev_err(&dev->dev, "%s not responding at SIR 0x%lx, FIR 0x%lx; "
"auto-configuring\n", dev->id->id,
- (unsigned long) pnp_port_start(dev, 0),
- (unsigned long) pnp_port_start(dev, 1));
+ (unsigned long)pnp_port_start(dev, 0),
+ (unsigned long)pnp_port_start(dev, 1));
pnp_disable_dev(dev);
pnp_init_resource_table(&dev->res);
pnp_activate_dev(dev);
if (quirk_smc_fir_enabled(dev)) {
dev_err(&dev->dev, "responds at SIR 0x%lx, FIR 0x%lx\n",
- (unsigned long) pnp_port_start(dev, 0),
- (unsigned long) pnp_port_start(dev, 1));
+ (unsigned long)pnp_port_start(dev, 0),
+ (unsigned long)pnp_port_start(dev, 1));
return;
}
*/
dev_err(&dev->dev, "not responding at SIR 0x%lx, FIR 0x%lx; "
"swapping SIR/FIR and reconfiguring\n",
- (unsigned long) pnp_port_start(dev, 0),
- (unsigned long) pnp_port_start(dev, 1));
+ (unsigned long)pnp_port_start(dev, 0),
+ (unsigned long)pnp_port_start(dev, 1));
/*
* Clear IORESOURCE_AUTO so pnp_activate_dev() doesn't reassign
if (quirk_smc_fir_enabled(dev)) {
dev_err(&dev->dev, "responds at SIR 0x%lx, FIR 0x%lx\n",
- (unsigned long) pnp_port_start(dev, 0),
- (unsigned long) pnp_port_start(dev, 1));
+ (unsigned long)pnp_port_start(dev, 0),
+ (unsigned long)pnp_port_start(dev, 1));
return;
}
"email bjorn.helgaas@hp.com\n");
}
-
/*
* PnP Quirks
* Cards or devices that need some tweaking due to incomplete resource info
static struct pnp_fixup pnp_fixups[] = {
/* Soundblaster awe io port quirk */
- { "CTL0021", quirk_awe32_resources },
- { "CTL0022", quirk_awe32_resources },
- { "CTL0023", quirk_awe32_resources },
+ {"CTL0021", quirk_awe32_resources},
+ {"CTL0022", quirk_awe32_resources},
+ {"CTL0023", quirk_awe32_resources},
/* CMI 8330 interrupt and dma fix */
- { "@X@0001", quirk_cmi8330_resources },
+ {"@X@0001", quirk_cmi8330_resources},
/* Soundblaster audio device io port range quirk */
- { "CTL0001", quirk_sb16audio_resources },
- { "CTL0031", quirk_sb16audio_resources },
- { "CTL0041", quirk_sb16audio_resources },
- { "CTL0042", quirk_sb16audio_resources },
- { "CTL0043", quirk_sb16audio_resources },
- { "CTL0044", quirk_sb16audio_resources },
- { "CTL0045", quirk_sb16audio_resources },
- { "SMCf010", quirk_smc_enable },
- { "" }
+ {"CTL0001", quirk_sb16audio_resources},
+ {"CTL0031", quirk_sb16audio_resources},
+ {"CTL0041", quirk_sb16audio_resources},
+ {"CTL0042", quirk_sb16audio_resources},
+ {"CTL0043", quirk_sb16audio_resources},
+ {"CTL0044", quirk_sb16audio_resources},
+ {"CTL0045", quirk_sb16audio_resources},
+ {"SMCf010", quirk_smc_enable},
+ {""}
};
void pnp_fixup_device(struct pnp_dev *dev)
int i = 0;
while (*pnp_fixups[i].id) {
- if (compare_pnp_id(dev->id,pnp_fixups[i].id)) {
- pnp_dbg("Calling quirk for %s",
- dev->dev.bus_id);
+ if (compare_pnp_id(dev->id, pnp_fixups[i].id)) {
+ pnp_dbg("Calling quirk for %s", dev->dev.bus_id);
pnp_fixups[i].quirk_function(dev);
}
i++;
*
* based on isapnp.c resource management (c) Jaroslav Kysela <perex@suse.cz>
* Copyright 2003 Adam Belay <ambx1@neo.rr.com>
- *
*/
#include <linux/module.h>
#include <linux/pnp.h>
#include "base.h"
-static int pnp_reserve_irq[16] = { [0 ... 15] = -1 }; /* reserve (don't use) some IRQ */
-static int pnp_reserve_dma[8] = { [0 ... 7] = -1 }; /* reserve (don't use) some DMA */
-static int pnp_reserve_io[16] = { [0 ... 15] = -1 }; /* reserve (don't use) some I/O region */
-static int pnp_reserve_mem[16] = { [0 ... 15] = -1 }; /* reserve (don't use) some memory region */
-
+static int pnp_reserve_irq[16] = {[0 ... 15] = -1 }; /* reserve (don't use) some IRQ */
+static int pnp_reserve_dma[8] = {[0 ... 7] = -1 }; /* reserve (don't use) some DMA */
+static int pnp_reserve_io[16] = {[0 ... 15] = -1 }; /* reserve (don't use) some I/O region */
+static int pnp_reserve_mem[16] = {[0 ... 15] = -1 }; /* reserve (don't use) some memory region */
/*
* option registration
*/
-static struct pnp_option * pnp_build_option(int priority)
+static struct pnp_option *pnp_build_option(int priority)
{
struct pnp_option *option = pnp_alloc(sizeof(struct pnp_option));
- /* check if pnp_alloc ran out of memory */
if (!option)
return NULL;
return option;
}
-struct pnp_option * pnp_register_independent_option(struct pnp_dev *dev)
+struct pnp_option *pnp_register_independent_option(struct pnp_dev *dev)
{
struct pnp_option *option;
+
if (!dev)
return NULL;
return option;
}
-struct pnp_option * pnp_register_dependent_option(struct pnp_dev *dev, int priority)
+struct pnp_option *pnp_register_dependent_option(struct pnp_dev *dev,
+ int priority)
{
struct pnp_option *option;
+
if (!dev)
return NULL;
int pnp_register_irq_resource(struct pnp_option *option, struct pnp_irq *data)
{
struct pnp_irq *ptr;
+
if (!option)
return -EINVAL;
if (!data)
int pnp_register_dma_resource(struct pnp_option *option, struct pnp_dma *data)
{
struct pnp_dma *ptr;
+
if (!option)
return -EINVAL;
if (!data)
int pnp_register_port_resource(struct pnp_option *option, struct pnp_port *data)
{
struct pnp_port *ptr;
+
if (!option)
return -EINVAL;
if (!data)
int pnp_register_mem_resource(struct pnp_option *option, struct pnp_mem *data)
{
struct pnp_mem *ptr;
+
if (!option)
return -EINVAL;
if (!data)
}
}
-
/*
* resource validity checking
*/
#define cannot_compare(flags) \
((flags) & (IORESOURCE_UNSET | IORESOURCE_DISABLED))
-int pnp_check_port(struct pnp_dev * dev, int idx)
+int pnp_check_port(struct pnp_dev *dev, int idx)
{
int tmp;
struct pnp_dev *tdev;
resource_size_t *port, *end, *tport, *tend;
+
port = &dev->res.port_resource[idx].start;
end = &dev->res.port_resource[idx].end;
/* check if the resource is already in use, skip if the
* device is active because it itself may be in use */
- if(!dev->active) {
- if (__check_region(&ioport_resource, *port, length(port,end)))
+ if (!dev->active) {
+ if (__check_region(&ioport_resource, *port, length(port, end)))
return 0;
}
for (tmp = 0; tmp < 8; tmp++) {
int rport = pnp_reserve_io[tmp << 1];
int rend = pnp_reserve_io[(tmp << 1) + 1] + rport - 1;
- if (ranged_conflict(port,end,&rport,&rend))
+ if (ranged_conflict(port, end, &rport, &rend))
return 0;
}
if (dev->res.port_resource[tmp].flags & IORESOURCE_IO) {
tport = &dev->res.port_resource[tmp].start;
tend = &dev->res.port_resource[tmp].end;
- if (ranged_conflict(port,end,tport,tend))
+ if (ranged_conflict(port, end, tport, tend))
return 0;
}
}
continue;
for (tmp = 0; tmp < PNP_MAX_PORT; tmp++) {
if (tdev->res.port_resource[tmp].flags & IORESOURCE_IO) {
- if (cannot_compare(tdev->res.port_resource[tmp].flags))
+ if (cannot_compare
+ (tdev->res.port_resource[tmp].flags))
continue;
tport = &tdev->res.port_resource[tmp].start;
tend = &tdev->res.port_resource[tmp].end;
- if (ranged_conflict(port,end,tport,tend))
+ if (ranged_conflict(port, end, tport, tend))
return 0;
}
}
return 1;
}
-int pnp_check_mem(struct pnp_dev * dev, int idx)
+int pnp_check_mem(struct pnp_dev *dev, int idx)
{
int tmp;
struct pnp_dev *tdev;
resource_size_t *addr, *end, *taddr, *tend;
+
addr = &dev->res.mem_resource[idx].start;
end = &dev->res.mem_resource[idx].end;
/* check if the resource is already in use, skip if the
* device is active because it itself may be in use */
- if(!dev->active) {
- if (check_mem_region(*addr, length(addr,end)))
+ if (!dev->active) {
+ if (check_mem_region(*addr, length(addr, end)))
return 0;
}
for (tmp = 0; tmp < 8; tmp++) {
int raddr = pnp_reserve_mem[tmp << 1];
int rend = pnp_reserve_mem[(tmp << 1) + 1] + raddr - 1;
- if (ranged_conflict(addr,end,&raddr,&rend))
+ if (ranged_conflict(addr, end, &raddr, &rend))
return 0;
}
if (dev->res.mem_resource[tmp].flags & IORESOURCE_MEM) {
taddr = &dev->res.mem_resource[tmp].start;
tend = &dev->res.mem_resource[tmp].end;
- if (ranged_conflict(addr,end,taddr,tend))
+ if (ranged_conflict(addr, end, taddr, tend))
return 0;
}
}
continue;
for (tmp = 0; tmp < PNP_MAX_MEM; tmp++) {
if (tdev->res.mem_resource[tmp].flags & IORESOURCE_MEM) {
- if (cannot_compare(tdev->res.mem_resource[tmp].flags))
+ if (cannot_compare
+ (tdev->res.mem_resource[tmp].flags))
continue;
taddr = &tdev->res.mem_resource[tmp].start;
tend = &tdev->res.mem_resource[tmp].end;
- if (ranged_conflict(addr,end,taddr,tend))
+ if (ranged_conflict(addr, end, taddr, tend))
return 0;
}
}
return IRQ_HANDLED;
}
-int pnp_check_irq(struct pnp_dev * dev, int idx)
+int pnp_check_irq(struct pnp_dev *dev, int idx)
{
int tmp;
struct pnp_dev *tdev;
- resource_size_t * irq = &dev->res.irq_resource[idx].start;
+ resource_size_t *irq = &dev->res.irq_resource[idx].start;
/* if the resource doesn't exist, don't complain about it */
if (cannot_compare(dev->res.irq_resource[idx].flags))
/* check if the resource is already in use, skip if the
* device is active because it itself may be in use */
- if(!dev->active) {
+ if (!dev->active) {
if (request_irq(*irq, pnp_test_handler,
- IRQF_DISABLED|IRQF_PROBE_SHARED, "pnp", NULL))
+ IRQF_DISABLED | IRQF_PROBE_SHARED, "pnp", NULL))
return 0;
free_irq(*irq, NULL);
}
continue;
for (tmp = 0; tmp < PNP_MAX_IRQ; tmp++) {
if (tdev->res.irq_resource[tmp].flags & IORESOURCE_IRQ) {
- if (cannot_compare(tdev->res.irq_resource[tmp].flags))
+ if (cannot_compare
+ (tdev->res.irq_resource[tmp].flags))
continue;
if ((tdev->res.irq_resource[tmp].start == *irq))
return 0;
return 1;
}
-int pnp_check_dma(struct pnp_dev * dev, int idx)
+int pnp_check_dma(struct pnp_dev *dev, int idx)
{
#ifndef CONFIG_IA64
int tmp;
struct pnp_dev *tdev;
- resource_size_t * dma = &dev->res.dma_resource[idx].start;
+ resource_size_t *dma = &dev->res.dma_resource[idx].start;
/* if the resource doesn't exist, don't complain about it */
if (cannot_compare(dev->res.dma_resource[idx].flags))
/* check if the resource is already in use, skip if the
* device is active because it itself may be in use */
- if(!dev->active) {
+ if (!dev->active) {
if (request_dma(*dma, "pnp"))
return 0;
free_dma(*dma);
continue;
for (tmp = 0; tmp < PNP_MAX_DMA; tmp++) {
if (tdev->res.dma_resource[tmp].flags & IORESOURCE_DMA) {
- if (cannot_compare(tdev->res.dma_resource[tmp].flags))
+ if (cannot_compare
+ (tdev->res.dma_resource[tmp].flags))
continue;
if ((tdev->res.dma_resource[tmp].start == *dma))
return 0;
return 1;
#else
- /* IA64 hasn't legacy DMA */
+ /* IA64 does not have legacy DMA */
return 0;
#endif
}
-
-#if 0
-EXPORT_SYMBOL(pnp_register_dependent_option);
-EXPORT_SYMBOL(pnp_register_independent_option);
-EXPORT_SYMBOL(pnp_register_irq_resource);
-EXPORT_SYMBOL(pnp_register_dma_resource);
-EXPORT_SYMBOL(pnp_register_port_resource);
-EXPORT_SYMBOL(pnp_register_mem_resource);
-#endif /* 0 */
-
-
/* format is: pnp_reserve_irq=irq1[,irq2] .... */
-
static int __init pnp_setup_reserve_irq(char *str)
{
int i;
for (i = 0; i < 16; i++)
- if (get_option(&str,&pnp_reserve_irq[i]) != 2)
+ if (get_option(&str, &pnp_reserve_irq[i]) != 2)
break;
return 1;
}
__setup("pnp_reserve_irq=", pnp_setup_reserve_irq);
/* format is: pnp_reserve_dma=dma1[,dma2] .... */
-
static int __init pnp_setup_reserve_dma(char *str)
{
int i;
for (i = 0; i < 8; i++)
- if (get_option(&str,&pnp_reserve_dma[i]) != 2)
+ if (get_option(&str, &pnp_reserve_dma[i]) != 2)
break;
return 1;
}
__setup("pnp_reserve_dma=", pnp_setup_reserve_dma);
/* format is: pnp_reserve_io=io1,size1[,io2,size2] .... */
-
static int __init pnp_setup_reserve_io(char *str)
{
int i;
for (i = 0; i < 16; i++)
- if (get_option(&str,&pnp_reserve_io[i]) != 2)
+ if (get_option(&str, &pnp_reserve_io[i]) != 2)
break;
return 1;
}
__setup("pnp_reserve_io=", pnp_setup_reserve_io);
/* format is: pnp_reserve_mem=mem1,size1[,mem2,size2] .... */
-
static int __init pnp_setup_reserve_mem(char *str)
{
int i;
for (i = 0; i < 16; i++)
- if (get_option(&str,&pnp_reserve_mem[i]) != 2)
+ if (get_option(&str, &pnp_reserve_mem[i]) != 2)
break;
return 1;
}
/*
- * support.c - provides standard pnp functions for the use of pnp protocol drivers,
+ * support.c - standard functions for the use of pnp protocol drivers
*
* Copyright 2003 Adam Belay <ambx1@neo.rr.com>
- *
*/
#include <linux/module.h>
#include "base.h"
/**
- * pnp_is_active - Determines if a device is active based on its current resources
+ * pnp_is_active - Determines if a device is active based on its current
+ * resources
* @dev: pointer to the desired PnP device
- *
*/
-
-int pnp_is_active(struct pnp_dev * dev)
+int pnp_is_active(struct pnp_dev *dev)
{
if (!pnp_port_start(dev, 0) && pnp_port_len(dev, 0) <= 1 &&
!pnp_mem_start(dev, 0) && pnp_mem_len(dev, 0) <= 1 &&
- pnp_irq(dev, 0) == -1 &&
- pnp_dma(dev, 0) == -1)
- return 0;
+ pnp_irq(dev, 0) == -1 && pnp_dma(dev, 0) == -1)
+ return 0;
else
return 1;
}
-
-
EXPORT_SYMBOL(pnp_is_active);
static const struct pnp_device_id pnp_dev_table[] = {
/* General ID for reserving resources */
- { "PNP0c02", 0 },
+ {"PNP0c02", 0},
/* memory controller */
- { "PNP0c01", 0 },
- { "", 0 }
+ {"PNP0c01", 0},
+ {"", 0}
};
-static void reserve_range(const char *pnpid, resource_size_t start, resource_size_t end, int port)
+static void reserve_range(const char *pnpid, resource_size_t start,
+ resource_size_t end, int port)
{
struct resource *res;
char *regionid;
return;
snprintf(regionid, 16, "pnp %s", pnpid);
if (port)
- res = request_region(start, end-start+1, regionid);
+ res = request_region(start, end - start + 1, regionid);
else
- res = request_mem_region(start, end-start+1, regionid);
+ res = request_mem_region(start, end - start + 1, regionid);
if (res == NULL)
kfree(regionid);
else
* example do reserve stuff they know about too, so we may well
* have double reservations.
*/
- printk(KERN_INFO
- "pnp: %s: %s range 0x%llx-0x%llx %s reserved\n",
- pnpid, port ? "ioport" : "iomem",
- (unsigned long long)start, (unsigned long long)end,
- NULL != res ? "has been" : "could not be");
+ printk(KERN_INFO "pnp: %s: %s range 0x%llx-0x%llx %s reserved\n",
+ pnpid, port ? "ioport" : "iomem",
+ (unsigned long long)start, (unsigned long long)end,
+ NULL != res ? "has been" : "could not be");
}
static void reserve_resources_of_dev(const struct pnp_dev *dev)
continue; /* invalid */
reserve_range(dev->dev.bus_id, pnp_port_start(dev, i),
- pnp_port_end(dev, i), 1);
+ pnp_port_end(dev, i), 1);
}
for (i = 0; i < PNP_MAX_MEM; i++) {
continue;
reserve_range(dev->dev.bus_id, pnp_mem_start(dev, i),
- pnp_mem_end(dev, i), 0);
+ pnp_mem_end(dev, i), 0);
}
-
- return;
}
-static int system_pnp_probe(struct pnp_dev * dev, const struct pnp_device_id *dev_id)
+static int system_pnp_probe(struct pnp_dev *dev,
+ const struct pnp_device_id *dev_id)
{
reserve_resources_of_dev(dev);
return 0;
}
static struct pnp_driver system_pnp_driver = {
- .name = "system",
- .id_table = pnp_dev_table,
- .flags = PNP_DRIVER_RES_DO_NOT_CHANGE,
- .probe = system_pnp_probe,
- .remove = NULL,
+ .name = "system",
+ .id_table = pnp_dev_table,
+ .flags = PNP_DRIVER_RES_DO_NOT_CHANGE,
+ .probe = system_pnp_probe,
};
static int __init pnp_system_init(void)
rtc-core-$(CONFIG_RTC_INTF_PROC) += rtc-proc.o
rtc-core-$(CONFIG_RTC_INTF_SYSFS) += rtc-sysfs.o
+# Keep the list ordered.
+
+obj-$(CONFIG_RTC_DRV_AT32AP700X)+= rtc-at32ap700x.o
+obj-$(CONFIG_RTC_DRV_AT91RM9200)+= rtc-at91rm9200.o
+obj-$(CONFIG_RTC_DRV_BFIN) += rtc-bfin.o
obj-$(CONFIG_RTC_DRV_CMOS) += rtc-cmos.o
-obj-$(CONFIG_RTC_DRV_X1205) += rtc-x1205.o
-obj-$(CONFIG_RTC_DRV_ISL1208) += rtc-isl1208.o
-obj-$(CONFIG_RTC_DRV_TEST) += rtc-test.o
-obj-$(CONFIG_RTC_DRV_AT32AP700X) += rtc-at32ap700x.o
+obj-$(CONFIG_RTC_DRV_DS1216) += rtc-ds1216.o
obj-$(CONFIG_RTC_DRV_DS1307) += rtc-ds1307.o
+obj-$(CONFIG_RTC_DRV_DS1553) += rtc-ds1553.o
obj-$(CONFIG_RTC_DRV_DS1672) += rtc-ds1672.o
obj-$(CONFIG_RTC_DRV_DS1742) += rtc-ds1742.o
+obj-$(CONFIG_RTC_DRV_EP93XX) += rtc-ep93xx.o
+obj-$(CONFIG_RTC_DRV_ISL1208) += rtc-isl1208.o
+obj-$(CONFIG_RTC_DRV_M41T80) += rtc-m41t80.o
+obj-$(CONFIG_RTC_DRV_M48T59) += rtc-m48t59.o
+obj-$(CONFIG_RTC_DRV_M48T86) += rtc-m48t86.o
+obj-$(CONFIG_RTC_DRV_MAX6900) += rtc-max6900.o
+obj-$(CONFIG_RTC_DRV_MAX6902) += rtc-max6902.o
obj-$(CONFIG_RTC_DRV_OMAP) += rtc-omap.o
obj-$(CONFIG_RTC_DRV_PCF8563) += rtc-pcf8563.o
obj-$(CONFIG_RTC_DRV_PCF8583) += rtc-pcf8583.o
+obj-$(CONFIG_RTC_DRV_PL031) += rtc-pl031.o
+obj-$(CONFIG_RTC_DRV_RS5C313) += rtc-rs5c313.o
+obj-$(CONFIG_RTC_DRV_RS5C348) += rtc-rs5c348.o
obj-$(CONFIG_RTC_DRV_RS5C372) += rtc-rs5c372.o
obj-$(CONFIG_RTC_DRV_S3C) += rtc-s3c.o
-obj-$(CONFIG_RTC_DRV_RS5C348) += rtc-rs5c348.o
-obj-$(CONFIG_RTC_DRV_M41T80) += rtc-m41t80.o
-obj-$(CONFIG_RTC_DRV_M48T86) += rtc-m48t86.o
-obj-$(CONFIG_RTC_DRV_DS1553) += rtc-ds1553.o
-obj-$(CONFIG_RTC_DRV_STK17TA8) += rtc-stk17ta8.o
-obj-$(CONFIG_RTC_DRV_RS5C313) += rtc-rs5c313.o
-obj-$(CONFIG_RTC_DRV_EP93XX) += rtc-ep93xx.o
obj-$(CONFIG_RTC_DRV_SA1100) += rtc-sa1100.o
-obj-$(CONFIG_RTC_DRV_VR41XX) += rtc-vr41xx.o
-obj-$(CONFIG_RTC_DRV_PL031) += rtc-pl031.o
-obj-$(CONFIG_RTC_DRV_MAX6900) += rtc-max6900.o
-obj-$(CONFIG_RTC_DRV_MAX6902) += rtc-max6902.o
-obj-$(CONFIG_RTC_DRV_V3020) += rtc-v3020.o
-obj-$(CONFIG_RTC_DRV_AT91RM9200)+= rtc-at91rm9200.o
obj-$(CONFIG_RTC_DRV_SH) += rtc-sh.o
-obj-$(CONFIG_RTC_DRV_BFIN) += rtc-bfin.o
-obj-$(CONFIG_RTC_DRV_M48T59) += rtc-m48t59.o
-obj-$(CONFIG_RTC_DRV_DS1216) += rtc-ds1216.o
+obj-$(CONFIG_RTC_DRV_STK17TA8) += rtc-stk17ta8.o
+obj-$(CONFIG_RTC_DRV_TEST) += rtc-test.o
+obj-$(CONFIG_RTC_DRV_V3020) += rtc-v3020.o
+obj-$(CONFIG_RTC_DRV_VR41XX) += rtc-vr41xx.o
+obj-$(CONFIG_RTC_DRV_X1205) += rtc-x1205.o
{
struct rtc_device *rtc = to_rtc_device(dev);
struct rtc_time tm;
+ struct timespec ts = current_kernel_time();
if (strncmp(rtc->dev.bus_id,
CONFIG_RTC_HCTOSYS_DEVICE,
/* RTC precision is 1 second; adjust delta for avg 1/2 sec err */
set_normalized_timespec(&delta,
- xtime.tv_sec - oldtime,
- xtime.tv_nsec - (NSEC_PER_SEC >> 1));
+ ts.tv_sec - oldtime,
+ ts.tv_nsec - (NSEC_PER_SEC >> 1));
return 0;
}
/* oscillator fault? clear flag, and warn */
if (ds1307->regs[DS1307_REG_CONTROL] & DS1338_BIT_OSF) {
i2c_smbus_write_byte_data(client, DS1307_REG_CONTROL,
- ds1307->regs[DS1337_REG_CONTROL]
+ ds1307->regs[DS1307_REG_CONTROL]
& ~DS1338_BIT_OSF);
dev_warn(&client->dev, "SET TIME!\n");
goto read_rtc;
.ioctl = stk17ta8_rtc_ioctl,
};
-static ssize_t stk17ta8_nvram_read(struct kobject *kobj, char *buf,
+static ssize_t stk17ta8_nvram_read(struct kobject *kobj,
+ struct bin_attribute *attr, char *buf,
loff_t pos, size_t size)
{
struct platform_device *pdev =
return count;
}
-static ssize_t stk17ta8_nvram_write(struct kobject *kobj, char *buf,
+static ssize_t stk17ta8_nvram_write(struct kobject *kobj,
+ struct bin_attribute *attr, char *buf,
loff_t pos, size_t size)
{
struct platform_device *pdev =
static void
__dasd_process_blk_queue(struct dasd_device * device)
{
- request_queue_t *queue;
+ struct request_queue *queue;
struct request *req;
struct dasd_ccw_req *cqr;
int nr_queued;
* Dasd request queue function. Called from ll_rw_blk.c
*/
static void
-do_dasd_request(request_queue_t * queue)
+do_dasd_request(struct request_queue * queue)
{
struct dasd_device *device;
struct dasd_device {
/* Block device stuff. */
struct gendisk *gdp;
- request_queue_t *request_queue;
+ struct request_queue *request_queue;
spinlock_t request_queue_lock;
struct block_device *bdev;
unsigned int devindex;
}
static int
-dcssblk_make_request(request_queue_t *q, struct bio *bio)
+dcssblk_make_request(struct request_queue *q, struct bio *bio)
{
struct dcssblk_dev_info *dev_info;
struct bio_vec *bvec;
/*
* Block device make request function.
*/
-static int xpram_make_request(request_queue_t *q, struct bio *bio)
+static int xpram_make_request(struct request_queue *q, struct bio *bio)
{
xpram_device_t *xdev = bio->bi_bdev->bd_disk->private_data;
struct bio_vec *bvec;
{
struct tape_device * device;
/* Block device request queue. */
- request_queue_t * request_queue;
+ struct request_queue * request_queue;
spinlock_t request_queue_lock;
/* Task to move entries from block request to CCS request queue. */
tapeblock_requeue(struct work_struct *work) {
struct tape_blk_data * blkdat;
struct tape_device * device;
- request_queue_t * queue;
+ struct request_queue * queue;
int nr_queued;
struct request * req;
struct list_head * l;
* Tape request queue function. Called from ll_rw_blk.c
*/
static void
-tapeblock_request_fn(request_queue_t *queue)
+tapeblock_request_fn(struct request_queue *queue)
{
struct tape_device *device;
int first = 1;
int i;
unsigned long duration;
- struct timespec done_stamp = xtime;
+ struct timespec done_stamp = current_kernel_time();
DBF_TEXT(trace, 4, __FUNCTION__);
spin_unlock(&ch->collect_lock);
ch->ccw[1].count = ch->trans_skb->len;
fsm_addtimer(&ch->timer, CTC_TIMEOUT_5SEC, CH_EVENT_TIMER, ch);
- ch->prof.send_stamp = xtime;
+ ch->prof.send_stamp = current_kernel_time();
rc = ccw_device_start(ch->cdev, &ch->ccw[0],
(unsigned long) ch, 0xff, 0);
ch->prof.doios_multi++;
fsm_newstate(ch->fsm, CH_STATE_TX);
fsm_addtimer(&ch->timer, CTC_TIMEOUT_5SEC, CH_EVENT_TIMER, ch);
spin_lock_irqsave(get_ccwdev_lock(ch->cdev), saveflags);
- ch->prof.send_stamp = xtime;
+ ch->prof.send_stamp = current_kernel_time();
rc = ccw_device_start(ch->cdev, &ch->ccw[ccw_idx],
(unsigned long) ch, 0xff, 0);
spin_unlock_irqrestore(get_ccwdev_lock(ch->cdev), saveflags);
header.next = 0;
memcpy(skb_put(conn->tx_buff, NETIUCV_HDRLEN), &header, NETIUCV_HDRLEN);
- conn->prof.send_stamp = xtime;
+ conn->prof.send_stamp = current_kernel_time();
txmsg.class = 0;
txmsg.tag = 0;
rc = iucv_message_send(conn->path, &txmsg, 0, 0,
memcpy(skb_put(nskb, NETIUCV_HDRLEN), &header, NETIUCV_HDRLEN);
fsm_newstate(conn->fsm, CONN_STATE_TX);
- conn->prof.send_stamp = xtime;
+ conn->prof.send_stamp = current_kernel_time();
msg.tag = 1;
msg.class = 0;
config SUN_MOSTEK_RTC
tristate "Mostek real time clock support"
+ depends on SPARC32
help
The Mostek RTC chip is used on all known Sun computers except
some JavaStations. For a JavaStation you need to say Y both here
}
}
-static void jsfd_do_request(request_queue_t *q)
+static void jsfd_do_request(struct request_queue *q)
{
struct request *req;
static int aac_cfg_ioctl(struct inode *inode, struct file *file,
unsigned int cmd, unsigned long arg)
{
+ if (!capable(CAP_SYS_ADMIN))
+ return -EPERM;
return aac_do_ioctl(file->private_data, cmd, (void __user *)arg);
}
static long aac_compat_cfg_ioctl(struct file *file, unsigned cmd, unsigned long arg)
{
+ if (!capable(CAP_SYS_ADMIN))
+ return -EPERM;
return aac_compat_do_ioctl((struct aac_dev *)file->private_data, cmd, arg);
}
#endif
static struct scsi_cmnd *scsi_end_request(struct scsi_cmnd *cmd, int uptodate,
int bytes, int requeue)
{
- request_queue_t *q = cmd->device->request_queue;
+ struct request_queue *q = cmd->device->request_queue;
struct request *req = cmd->request;
unsigned long flags;
{
int result = cmd->result;
int this_count = cmd->request_bufflen;
- request_queue_t *q = cmd->device->request_queue;
+ struct request_queue *q = cmd->device->request_queue;
struct request *req = cmd->request;
int clear_errors = 1;
struct scsi_sense_hdr sshdr;
return BLKPREP_KILL;
}
-static int scsi_issue_flush_fn(request_queue_t *q, struct gendisk *disk,
+static int scsi_issue_flush_fn(struct request_queue *q, struct gendisk *disk,
sector_t *error_sector)
{
struct scsi_device *sdev = q->queuedata;
/*
* Kill a request for a dead device
*/
-static void scsi_kill_request(struct request *req, request_queue_t *q)
+static void scsi_kill_request(struct request *req, struct request_queue *q)
{
struct scsi_cmnd *cmd = req->special;
struct scsi_device *sdev = cmd->device;
int
scsi_internal_device_block(struct scsi_device *sdev)
{
- request_queue_t *q = sdev->request_queue;
+ struct request_queue *q = sdev->request_queue;
unsigned long flags;
int err = 0;
int
scsi_internal_device_unblock(struct scsi_device *sdev)
{
- request_queue_t *q = sdev->request_queue;
+ struct request_queue *q = sdev->request_queue;
int err;
unsigned long flags;
return ret;
}
-static void sd_prepare_flush(request_queue_t *q, struct request *rq)
+static void sd_prepare_flush(struct request_queue *q, struct request *rq)
{
memset(rq->cmd, 0, sizeof(rq->cmd));
rq->cmd_type = REQ_TYPE_BLOCK_PC;
*/
int hard_sector = sector_size;
sector_t sz = (sdkp->capacity/2) * (hard_sector/256);
- request_queue_t *queue = sdp->request_queue;
+ struct request_queue *queue = sdp->request_queue;
sector_t mb = sz;
blk_queue_hardsect_size(queue, hard_sector);
unsigned char *buffer;
int the_result, retries = 3;
int sector_size;
- request_queue_t *queue;
+ struct request_queue *queue;
buffer = kmalloc(512, GFP_KERNEL | GFP_DMA);
if (!buffer)
#include <linux/keyboard.h>
#include <linux/init.h>
#include <linux/pm.h>
-#include <linux/pm_legacy.h>
#include <linux/bitops.h>
#include <linux/delay.h>
return IRQ_HANDLED;
}
-static void do_softint(void *private)
+static void do_softint(struct work_struct *work)
{
- struct m68k_serial *info = (struct m68k_serial *) private;
+ struct m68k_serial *info = container_of(work, struct m68k_serial, tqueue);
struct tty_struct *tty;
tty = info->tty;
* do_serial_hangup() -> tty->hangup() -> rs_hangup()
*
*/
-static void do_serial_hangup(void *private)
+static void do_serial_hangup(struct work_struct *work)
{
- struct m68k_serial *info = (struct m68k_serial *) private;
+ struct m68k_serial *info = container_of(work, struct m68k_serial, tqueue_hangup);
struct tty_struct *tty;
tty = info->tty;
printk("MC68328 serial driver version 1.00\n");
}
-#ifdef CONFIG_PM_LEGACY
-/* Serial Power management
- * The console (currently fixed at line 0) is a special case for power
- * management because the kernel is so chatty. The console will be
- * explicitly disabled my our power manager as the last minute, so we won't
- * mess with it here.
- */
-static struct pm_dev *serial_pm[NR_PORTS];
-
-static int serial_pm_callback(struct pm_dev *dev, pm_request_t request, void *data)
-{
- struct m68k_serial *info = (struct m68k_serial *)dev->data;
-
- if(info == NULL)
- return -1;
-
- /* special case for line 0 - pm restores it */
- if(info->line == 0)
- return 0;
-
- switch (request) {
- case PM_SUSPEND:
- shutdown(info);
- break;
-
- case PM_RESUME:
- startup(info);
- break;
- }
- return 0;
-}
-
-void shutdown_console(void)
-{
- struct m68k_serial *info = &m68k_soft[0];
-
- /* HACK: wait a bit for any pending printk's to be dumped */
- {
- int i = 10000;
- while(i--);
- }
-
- shutdown(info);
-}
-
-void startup_console(void)
-{
- struct m68k_serial *info = &m68k_soft[0];
- startup(info);
-}
-#endif /* CONFIG_PM_LEGACY */
-
-
static const struct tty_operations rs_ops = {
.open = rs_open,
.close = rs_close,
info->event = 0;
info->count = 0;
info->blocked_open = 0;
- INIT_WORK(&info->tqueue, do_softint, info);
- INIT_WORK(&info->tqueue_hangup, do_serial_hangup, info);
+ INIT_WORK(&info->tqueue, do_softint);
+ INIT_WORK(&info->tqueue_hangup, do_serial_hangup);
init_waitqueue_head(&info->open_wait);
init_waitqueue_head(&info->close_wait);
info->line = i;
IRQ_FLG_STD,
"M68328_UART", NULL))
panic("Unable to attach 68328 serial interrupt\n");
-#ifdef CONFIG_PM_LEGACY
- serial_pm[i] = pm_register(PM_SYS_DEV, PM_SYS_COM, serial_pm_callback);
- if (serial_pm[i])
- serial_pm[i]->data = info;
-#endif
}
local_irq_restore(flags);
return 0;
ret = serial8250_register_port(&port);
if (ret < 0) {
dev_err(&dev->dev, "unable to register port at index %d "
- "(IO%lx MEM%lx IRQ%d): %d\n", i,
- p->iobase, p->mapbase, p->irq, ret);
+ "(IO%lx MEM%llx IRQ%d): %d\n", i,
+ p->iobase, (unsigned long long)p->mapbase,
+ p->irq, ret);
}
}
return 0;
#else
port->membase = ioremap(port->mapbase, 64);
if (!port->membase) {
- printk(KERN_ERR "%s: Couldn't ioremap 0x%lx\n",
- __FUNCTION__, port->mapbase);
+ printk(KERN_ERR "%s: Couldn't ioremap 0x%llx\n",
+ __FUNCTION__,
+ (unsigned long long)port->mapbase);
return -ENOMEM;
}
#endif
device->baud);
}
- printk(KERN_INFO "Early serial console at %s 0x%lx (options '%s')\n",
+ printk(KERN_INFO "Early serial console at %s 0x%llx (options '%s')\n",
mmio ? "MMIO" : "I/O port",
- mmio ? port->mapbase : (unsigned long) port->iobase,
+ mmio ? (unsigned long long) port->mapbase
+ : (unsigned long long) port->iobase,
device->options);
return 0;
}
tmp.hub6 = port->hub6;
tmp.io_type = port->iotype;
tmp.iomem_reg_shift = port->regshift;
- tmp.iomem_base = (void *)port->mapbase;
+ tmp.iomem_base = (void *)(unsigned long)port->mapbase;
if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
return -EFAULT;
return 0;
mmio = port->iotype >= UPIO_MEM;
- ret = sprintf(buf, "%d: uart:%s %s%08lX irq:%d",
+ ret = sprintf(buf, "%d: uart:%s %s%08llX irq:%d",
port->line, uart_type(port),
mmio ? "mmio:0x" : "port:",
- mmio ? port->mapbase : (unsigned long) port->iobase,
+ mmio ? (unsigned long long)port->mapbase
+ : (unsigned long long) port->iobase,
port->irq);
if (port->type == PORT_UNKNOWN) {
case UPIO_TSI:
case UPIO_DWAPB:
snprintf(address, sizeof(address),
- "MMIO 0x%lx", port->mapbase);
+ "MMIO 0x%llx", (unsigned long long)port->mapbase);
break;
default:
strlcpy(address, "*unknown*", sizeof(address));
#include <asm/hardware.h>
#include <asm/arch/regs-gpio.h>
-#include <asm/arch/regs-spi.h>
+#include <asm/plat-s3c24xx/regs-spi.h>
#include <asm/arch/spi.h>
struct s3c24xx_spi {
config FB_AU1100
bool "Au1100 LCD Driver"
- depends on (FB = y) && EXPERIMENTAL && PCI && MIPS && MIPS_PB1100=y
+ depends on (FB = y) && MIPS && SOC_AU1100
+ select FB_CFB_FILLRECT
+ select FB_CFB_COPYAREA
+ select FB_CFB_IMAGEBLIT
+ help
+ This is the framebuffer driver for the AMD Au1100 SOC. It can drive
+ various panels and CRTs by passing in kernel cmd line option
+ au1100fb:panel=<name>.
config FB_AU1200
bool "Au1200 LCD Driver"
#include <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/fb.h>
+#include <linux/pm.h>
#include <linux/init.h>
#include <linux/pci.h>
#include <linux/console.h>
if (state.event == pdev->dev.power.power_state.event)
return 0;
- if (state.event != PM_SUSPEND_MEM)
+ if (state.event != PM_EVENT_SUSPEND)
goto done;
acquire_console_sem();
u32 *palette = ((u32 *)info->pseudo_palette);
unsigned long pos, line_length, i, j;
const unsigned char *data;
- void *regs_base, *fb_base;
+ void __iomem *regs_base, *fb_base;
dx = image->dx;
dy = image->dy;
};
struct ds1wm_data {
- void *map;
+ void __iomem *map;
int bus_shift; /* # of shifts to calc register offsets */
struct platform_device *pdev;
struct ds1wm_platform_data *pdata;
msg->u.watch.vec = split(body, msg->hdr.len,
&msg->u.watch.vec_size);
if (IS_ERR(msg->u.watch.vec)) {
- kfree(msg);
err = PTR_ERR(msg->u.watch.vec);
+ kfree(msg);
goto out;
}
}
}
-inline int bio_phys_segments(request_queue_t *q, struct bio *bio)
+inline int bio_phys_segments(struct request_queue *q, struct bio *bio)
{
if (unlikely(!bio_flagged(bio, BIO_SEG_VALID)))
blk_recount_segments(q, bio);
return bio->bi_phys_segments;
}
-inline int bio_hw_segments(request_queue_t *q, struct bio *bio)
+inline int bio_hw_segments(struct request_queue *q, struct bio *bio)
{
if (unlikely(!bio_flagged(bio, BIO_SEG_VALID)))
blk_recount_segments(q, bio);
*/
void __bio_clone(struct bio *bio, struct bio *bio_src)
{
- request_queue_t *q = bdev_get_queue(bio_src->bi_bdev);
+ struct request_queue *q = bdev_get_queue(bio_src->bi_bdev);
memcpy(bio->bi_io_vec, bio_src->bi_io_vec,
bio_src->bi_max_vecs * sizeof(struct bio_vec));
*/
int bio_get_nr_vecs(struct block_device *bdev)
{
- request_queue_t *q = bdev_get_queue(bdev);
+ struct request_queue *q = bdev_get_queue(bdev);
int nr_pages;
nr_pages = ((q->max_sectors << 9) + PAGE_SIZE - 1) >> PAGE_SHIFT;
return nr_pages;
}
-static int __bio_add_page(request_queue_t *q, struct bio *bio, struct page
+static int __bio_add_page(struct request_queue *q, struct bio *bio, struct page
*page, unsigned int len, unsigned int offset,
unsigned short max_sectors)
{
* smaller than PAGE_SIZE, so it is always possible to add a single
* page to an empty bio. This should only be used by REQ_PC bios.
*/
-int bio_add_pc_page(request_queue_t *q, struct bio *bio, struct page *page,
+int bio_add_pc_page(struct request_queue *q, struct bio *bio, struct page *page,
unsigned int len, unsigned int offset)
{
return __bio_add_page(q, bio, page, len, offset, q->max_hw_sectors);
* to/from kernel pages as necessary. Must be paired with
* call bio_uncopy_user() on io completion.
*/
-struct bio *bio_copy_user(request_queue_t *q, unsigned long uaddr,
+struct bio *bio_copy_user(struct request_queue *q, unsigned long uaddr,
unsigned int len, int write_to_vm)
{
unsigned long end = (uaddr + len + PAGE_SIZE - 1) >> PAGE_SHIFT;
return ERR_PTR(ret);
}
-static struct bio *__bio_map_user_iov(request_queue_t *q,
+static struct bio *__bio_map_user_iov(struct request_queue *q,
struct block_device *bdev,
struct sg_iovec *iov, int iov_count,
int write_to_vm)
/**
* bio_map_user - map user address into bio
- * @q: the request_queue_t for the bio
+ * @q: the struct request_queue for the bio
* @bdev: destination block device
* @uaddr: start of user address
* @len: length in bytes
* Map the user space address into a bio suitable for io to a block
* device. Returns an error pointer in case of error.
*/
-struct bio *bio_map_user(request_queue_t *q, struct block_device *bdev,
+struct bio *bio_map_user(struct request_queue *q, struct block_device *bdev,
unsigned long uaddr, unsigned int len, int write_to_vm)
{
struct sg_iovec iov;
/**
* bio_map_user_iov - map user sg_iovec table into bio
- * @q: the request_queue_t for the bio
+ * @q: the struct request_queue for the bio
* @bdev: destination block device
* @iov: the iovec.
* @iov_count: number of elements in the iovec
* Map the user space address into a bio suitable for io to a block
* device. Returns an error pointer in case of error.
*/
-struct bio *bio_map_user_iov(request_queue_t *q, struct block_device *bdev,
+struct bio *bio_map_user_iov(struct request_queue *q, struct block_device *bdev,
struct sg_iovec *iov, int iov_count,
int write_to_vm)
{
}
-static struct bio *__bio_map_kern(request_queue_t *q, void *data,
+static struct bio *__bio_map_kern(struct request_queue *q, void *data,
unsigned int len, gfp_t gfp_mask)
{
unsigned long kaddr = (unsigned long)data;
/**
* bio_map_kern - map kernel address into bio
- * @q: the request_queue_t for the bio
+ * @q: the struct request_queue for the bio
* @data: pointer to buffer to map
* @len: length in bytes
* @gfp_mask: allocation flags for bio allocation
* Map the kernel address into a bio suitable for io to a block
* device. Returns an error pointer in case of error.
*/
-struct bio *bio_map_kern(request_queue_t *q, void *data, unsigned int len,
+struct bio *bio_map_kern(struct request_queue *q, void *data, unsigned int len,
gfp_t gfp_mask)
{
struct bio *bio;
return 0;
}
if (le32_to_cpu(gdp->bg_inode_table) < first_block ||
- le32_to_cpu(gdp->bg_inode_table) + sbi->s_itb_per_group >
+ le32_to_cpu(gdp->bg_inode_table) + sbi->s_itb_per_group - 1 >
last_block)
{
ext2_error (sb, "ext2_check_descriptors",
return 0;
}
if (le32_to_cpu(gdp->bg_inode_table) < first_block ||
- le32_to_cpu(gdp->bg_inode_table) + sbi->s_itb_per_group >
+ le32_to_cpu(gdp->bg_inode_table) + sbi->s_itb_per_group - 1 >
last_block)
{
ext3_error (sb, "ext3_check_descriptors",
}
inode_table = ext4_inode_table(sb, gdp);
if (inode_table < first_block ||
- inode_table + sbi->s_itb_per_group > last_block)
+ inode_table + sbi->s_itb_per_group - 1 > last_block)
{
ext4_error (sb, "ext4_check_descriptors",
"Inode table for group %d"
/*
* Deferred lock request handling for non-blocking lock
*/
-static u32
+static __be32
nlmsvc_defer_lock_rqst(struct svc_rqst *rqstp, struct nlm_block *block)
{
- u32 status = nlm_lck_denied_nolocks;
+ __be32 status = nlm_lck_denied_nolocks;
block->b_flags |= B_QUEUED;
status = nlm_drop_reply;
}
dprintk("lockd: nlmsvc_defer_lock_rqst block %p flags %d status %d\n",
- block, block->b_flags, status);
+ block, block->b_flags, ntohl(status));
return status;
}
}
static void
-nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, int nfserr,
+nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
struct nfsd4_secinfo *secinfo)
{
int i = 0;
src = buf->ops->map(pipe, buf, 1);
dst = kmap_atomic(page, KM_USER1);
memcpy(dst + offset, src + buf->offset, count);
- kunmap_atomic(page, KM_USER1);
+ kunmap_atomic(dst, KM_USER1);
buf->ops->unmap(pipe, buf, src);
copied = ocfs2_write_end(file, file->f_mapping, sd->pos, count, count,
if (inode->i_op && inode->i_op->fallocate)
ret = inode->i_op->fallocate(inode, mode, offset, len);
else
- ret = -ENOSYS;
+ ret = -EOPNOTSUPP;
out_fput:
fput(file);
/**
* generic_pipe_buf_confirm - verify contents of the pipe buffer
- * @pipe: the pipe that the buffer belongs to
+ * @info: the pipe that the buffer belongs to
* @buf: the buffer to confirm
*
* Description:
return ret;
}
-#if defined(CONFIG_X86_64) || defined(CONFIG_IA64)
+#if defined(CONFIG_COMPAT_FOR_U64_ALIGNMENT)
/*
* This code works only for 32 bit quota tools over 64 bit OS (x86_64, ia64)
* and is necessary due to alignment problems.
pos = I_UNFM_NUM(&s_ih);
while (le_ih_k_offset (&s_ih) + (pos - 1) * blk_size > n_new_file_length) {
- __u32 *unfm, block;
+ __le32 *unfm;
+ __u32 block;
/* Each unformatted block deletion may involve one additional
* bitmap block into the transaction, thereby the initial
break;
}
- unfm = (__u32 *)B_I_PITEM(p_s_bh, &s_ih) + pos - 1;
+ unfm = (__le32 *)B_I_PITEM(p_s_bh, &s_ih) + pos - 1;
block = get_block_num(unfm, 0);
if (block != 0) {
if (sizemask != sizeof(sigset_t) ||
copy_from_user(&sigmask, user_mask, sizeof(sigmask)))
- return error = -EINVAL;
+ return -EINVAL;
sigdelsetmask(&sigmask, sigmask(SIGKILL) | sigmask(SIGSTOP));
signotset(&sigmask);
* @spd: data to fill
*
* Description:
- * @spd contains a map of pages and len/offset tupples, a long with
+ * @spd contains a map of pages and len/offset tuples, along with
* the struct pipe_buf_operations associated with these pages. This
* function will link that data to the pipe.
*
* Description:
* This is a special case helper to splice directly between two
* points, without requiring an explicit pipe. Internally an allocated
- * pipe is cached in the process, and reused during the life time of
+ * pipe is cached in the process, and reused during the lifetime of
* that process.
*
*/
{
struct timerfd_ctx *ctx = file->private_data;
ssize_t res;
- u32 ticks = 0;
+ u64 ticks = 0;
DECLARE_WAITQUEUE(wait, current);
if (count < sizeof(ticks))
* callback to avoid DoS attacks specifying a very
* short timer period.
*/
- ticks = (u32)
+ ticks = (u64)
hrtimer_forward(&ctx->tmr,
hrtimer_cb_get_time(&ctx->tmr),
ctx->tintv);
}
spin_unlock_irq(&ctx->wqh.lock);
if (ticks)
- res = put_user(ticks, buf) ? -EFAULT: sizeof(ticks);
+ res = put_user(ticks, (u64 __user *) buf) ? -EFAULT: sizeof(ticks);
return res;
}
long count,
long *written)
{
- compat_xfs_inogrp_t *p32 = ubuffer;
+ compat_xfs_inogrp_t __user *p32 = ubuffer;
long i;
for (i = 0; i < count; i++) {
case XFS_IOC_FSINUMBERS_32:
cmd = _NATIVE_IOC(cmd, struct xfs_fsop_bulkreq);
return xfs_ioc_bulkstat_compat(XFS_BHVTOI(VNHEAD(vp))->i_mount,
- cmd, (void*)arg);
+ cmd, (void __user*)arg);
case XFS_IOC_FD_TO_HANDLE_32:
case XFS_IOC_PATH_TO_HANDLE_32:
case XFS_IOC_PATH_TO_FSHANDLE_32:
struct acpi_driver {
char name[80];
char class[80];
- char *ids; /* Supported Hardware IDs */
+ const struct acpi_device_id *ids; /* Supported Hardware IDs */
struct acpi_device_ops ops;
struct device_driver drv;
struct module *owner;
int acpi_bus_trim(struct acpi_device *start, int rmdevice);
int acpi_bus_start(struct acpi_device *device);
acpi_status acpi_bus_get_ejd(acpi_handle handle, acpi_handle * ejd);
-int acpi_match_ids(struct acpi_device *device, char *ids);
+int acpi_match_device_ids(struct acpi_device *device,
+ const struct acpi_device_id *ids);
int acpi_create_dir(struct acpi_device *);
void acpi_remove_dir(struct acpi_device *);
acpi_handle acpi_get_pci_rootbridge_handle(unsigned int, unsigned int);
#define DEVICE_ACPI_HANDLE(dev) ((acpi_handle)((dev)->archdata.acpi_handle))
+int acpi_pm_device_sleep_state(struct device *, int, int *);
+
#endif /* CONFIG_ACPI */
#endif /*__ACPI_BUS_H__*/
#define ACPI_BUS_COMPONENT 0x00010000
#define ACPI_SYSTEM_COMPONENT 0x02000000
-/* _HID definitions */
+/*
+ * _HID definitions
+ * HIDs must conform to ACPI spec(6.1.4)
+ * Linux specific HIDs do not apply to this and begin with LNX:
+ */
-#define ACPI_POWER_HID "power_resource"
+#define ACPI_POWER_HID "LNXPOWER"
#define ACPI_PROCESSOR_HID "ACPI0007"
-#define ACPI_SYSTEM_HID "acpi_system"
-#define ACPI_THERMAL_HID "thermal"
-#define ACPI_BUTTON_HID_POWERF "button_power"
-#define ACPI_BUTTON_HID_SLEEPF "button_sleep"
-#define ACPI_VIDEO_HID "video"
-#define ACPI_BAY_HID "bay"
+#define ACPI_SYSTEM_HID "LNXSYSTM"
+#define ACPI_THERMAL_HID "LNXTHERM"
+#define ACPI_BUTTON_HID_POWERF "LNXPWRBN"
+#define ACPI_BUTTON_HID_SLEEPF "LNXSLPBN"
+#define ACPI_VIDEO_HID "LNXVIDEO"
+#define ACPI_BAY_HID "LNXIOBAY"
+
/* --------------------------------------------------------------------------
PCI
-------------------------------------------------------------------------- */
/*--------------------------------------------------------------------------
Suspend/Resume
-------------------------------------------------------------------------- */
-#ifdef CONFIG_ACPI_SLEEP
extern int acpi_sleep_init(void);
-#else
-#define acpi_sleep_init() do {} while (0)
-#endif
#endif /*__ACPI_DRIVERS_H__*/
/* Common string version of device HIDs and UIDs */
-struct acpi_device_id {
+struct acpica_device_id {
char value[ACPI_DEVICE_ID_LENGTH];
};
u32 valid; /* Indicates which fields below are valid */
u32 current_status; /* _STA value */
acpi_integer address; /* _ADR value if any */
- struct acpi_device_id hardware_id; /* _HID value if any */
- struct acpi_device_id unique_id; /* _UID value if any */
+ struct acpica_device_id hardware_id; /* _HID value if any */
+ struct acpica_device_id unique_id; /* _UID value if any */
u8 highest_dstates[4]; /* _sx_d values: 0xFF indicates not valid */
struct acpi_compatible_id_list compatibility_id; /* List of _CIDs if any */
};
acpi_status
acpi_ut_execute_HID(struct acpi_namespace_node *device_node,
- struct acpi_device_id *hid);
+ struct acpica_device_id *hid);
acpi_status
acpi_ut_execute_CID(struct acpi_namespace_node *device_node,
acpi_status
acpi_ut_execute_UID(struct acpi_namespace_node *device_node,
- struct acpi_device_id *uid);
+ struct acpica_device_id *uid);
acpi_status
acpi_ut_execute_sxds(struct acpi_namespace_node *device_node, u8 * highest);
{
unsigned long t, a, r;
- t = __kernel_cmpbge (x, 0x0101010101010101);
+ t = __kernel_cmpbge (x, 0x0101010101010101UL);
a = __flsm1_tab[t];
t = __kernel_extbl (x, a);
r = a*8 + __flsm1_tab[t] + (x != 0);
#define __MXC_BOOT_UNCOMPRESS
#include <asm/hardware.h>
-#include <asm/processor.h>
#define UART(x) (*(volatile unsigned long *)(serial_port + (x)))
}
while (!(UART(USR2) & USR2_TXFE))
- cpu_relax();
+ barrier();
UART(TXR) = ch;
}
struct omap_mbox_queue {
spinlock_t lock;
- request_queue_t *queue;
+ struct request_queue *queue;
struct work_struct work;
int (*callback)(void *);
struct omap_mbox *mbox;
__get_unaligned_4_be((__p+4)))
#define __get_unaligned_le(ptr) \
- ({ \
+ ((__force typeof(*(ptr)))({ \
const __u8 *__p = (const __u8 *)(ptr); \
__builtin_choose_expr(sizeof(*(ptr)) == 1, *__p, \
__builtin_choose_expr(sizeof(*(ptr)) == 2, __get_unaligned_2_le(__p), \
__builtin_choose_expr(sizeof(*(ptr)) == 4, __get_unaligned_4_le(__p), \
__builtin_choose_expr(sizeof(*(ptr)) == 8, __get_unaligned_8_le(__p), \
(void)__bug_unaligned_x(__p))))); \
- })
+ }))
#define __get_unaligned_be(ptr) \
- ({ \
+ ((__force typeof(*(ptr)))({ \
const __u8 *__p = (const __u8 *)(ptr); \
__builtin_choose_expr(sizeof(*(ptr)) == 1, *__p, \
__builtin_choose_expr(sizeof(*(ptr)) == 2, __get_unaligned_2_be(__p), \
__builtin_choose_expr(sizeof(*(ptr)) == 4, __get_unaligned_4_be(__p), \
__builtin_choose_expr(sizeof(*(ptr)) == 8, __get_unaligned_8_be(__p), \
(void)__bug_unaligned_x(__p))))); \
- })
+ }))
static inline void __put_unaligned_2_le(__u32 __v, register __u8 *__p)
*/
#define __put_unaligned_le(val,ptr) \
({ \
+ (void)sizeof(*(ptr) = (val)); \
switch (sizeof(*(ptr))) { \
case 1: \
*(ptr) = (val); \
break; \
- case 2: __put_unaligned_2_le((val),(__u8 *)(ptr)); \
+ case 2: __put_unaligned_2_le((__force u16)(val),(__u8 *)(ptr)); \
break; \
- case 4: __put_unaligned_4_le((val),(__u8 *)(ptr)); \
+ case 4: __put_unaligned_4_le((__force u32)(val),(__u8 *)(ptr)); \
break; \
- case 8: __put_unaligned_8_le((val),(__u8 *)(ptr)); \
+ case 8: __put_unaligned_8_le((__force u64)(val),(__u8 *)(ptr)); \
break; \
default: __bug_unaligned_x(ptr); \
break; \
#define __put_unaligned_be(val,ptr) \
({ \
+ (void)sizeof(*(ptr) = (val)); \
switch (sizeof(*(ptr))) { \
case 1: \
*(ptr) = (val); \
break; \
- case 2: __put_unaligned_2_be((val),(__u8 *)(ptr)); \
+ case 2: __put_unaligned_2_be((__force u16)(val),(__u8 *)(ptr)); \
break; \
- case 4: __put_unaligned_4_be((val),(__u8 *)(ptr)); \
+ case 4: __put_unaligned_4_be((__force u32)(val),(__u8 *)(ptr)); \
break; \
- case 8: __put_unaligned_8_be((val),(__u8 *)(ptr)); \
+ case 8: __put_unaligned_8_be((__force u64)(val),(__u8 *)(ptr)); \
break; \
default: __bug_unaligned_x(ptr); \
break; \
}
extern int acpi_irq_balance_set(char *str);
-#else /* !CONFIG_ACPI */
-
-#define acpi_lapic 0
-#define acpi_ioapic 0
-static inline void acpi_noirq_set(void) { }
-static inline void acpi_disable_pci(void) { }
-static inline void disable_acpi(void) { }
-
-#endif /* !CONFIG_ACPI */
-
-
-#ifdef CONFIG_ACPI_SLEEP
-
/* routines for saving/restoring kernel state */
extern int acpi_save_state_mem(void);
extern void acpi_restore_state_mem(void);
/* early initialization routine */
extern void acpi_reserve_bootmem(void);
-#endif /*CONFIG_ACPI_SLEEP*/
+#else /* !CONFIG_ACPI */
+
+#define acpi_lapic 0
+#define acpi_ioapic 0
+static inline void acpi_noirq_set(void) { }
+static inline void acpi_disable_pci(void) { }
+static inline void disable_acpi(void) { }
+
+#endif /* !CONFIG_ACPI */
#define ARCH_HAS_POWER_INIT 1
#include <linux/types.h>
#include <linux/screen_info.h>
#include <linux/apm_bios.h>
-#include <asm/e820.h>
#include <linux/edd.h>
+#include <asm/e820.h>
+#include <asm/ist.h>
#include <video/edid.h>
struct setup_header {
u32 _pad1;
u32 efi_systab;
u32 efi_memdesc_size;
- u32 efi_memdec_version;
+ u32 efi_memdesc_version;
u32 efi_memmap;
- u32 fi_memmap_size;
+ u32 efi_memmap_size;
u32 _pad2[2];
};
struct screen_info screen_info; /* 0x000 */
struct apm_bios_info apm_bios_info; /* 0x040 */
u8 _pad2[12]; /* 0x054 */
- u32 speedstep_info[4]; /* 0x060 */
+ struct ist_info ist_info; /* 0x060 */
u8 _pad3[16]; /* 0x070 */
u8 hd0_info[16]; /* obsolete! */ /* 0x080 */
u8 hd1_info[16]; /* obsolete! */ /* 0x090 */
#ifdef __KERNEL__
+#include <linux/types.h>
+
struct ist_info {
- unsigned long signature;
- unsigned long command;
- unsigned long event;
- unsigned long perf_level;
+ u32 signature;
+ u32 command;
+ u32 event;
+ u32 perf_level;
};
extern struct ist_info ist_info;
unsigned long return_address;
} __attribute__((packed));
-#ifdef CONFIG_ACPI_SLEEP
+#ifdef CONFIG_ACPI
extern unsigned long saved_eip;
extern unsigned long saved_esp;
extern unsigned long saved_ebp;
int acpi_request_vector (u32 int_type);
int acpi_gsi_to_irq (u32 gsi, unsigned int *irq);
+/* routines for saving/restoring kernel state */
+extern int acpi_save_state_mem(void);
+extern void acpi_restore_state_mem(void);
+extern unsigned long acpi_wakeup_address;
+
/*
* Record the cpei override flag and current logical cpu. This is
* useful for CPU removal.
extern int ia32_setup_frame1 (int sig, struct k_sigaction *ka, siginfo_t *info,
sigset_t *set, struct pt_regs *regs);
#if PAGE_SHIFT > IA32_PAGE_SHIFT
-extern int ia32_copy_partial_page_list (struct task_struct *, unsigned long);
-extern void ia32_drop_partial_page_list (struct task_struct *);
+extern int ia32_copy_ia64_partial_page_list(struct task_struct *,
+ unsigned long);
+extern void ia32_drop_ia64_partial_page_list(struct task_struct *);
#else
-# define ia32_copy_partial_page_list(a1, a2) 0
-# define ia32_drop_partial_page_list(a1) do { ; } while (0)
+# define ia32_copy_ia64_partial_page_list(a1, a2) 0
+# define ia32_drop_ia64_partial_page_list(a1) do { ; } while (0)
#endif
#endif /* !__ASSEMBLY__ */
extern struct ia64_machine_vector ia64_mv;
extern void machvec_init (const char *name);
+extern void machvec_init_from_cmdline(const char *cmdline);
# else
# error Unknown configuration. Update asm-ia64/machvec.h.
#define TLS_SIZE (GDT_ENTRY_TLS_ENTRIES * 8)
-struct partial_page_list;
+struct ia64_partial_page_list;
#endif
struct thread_struct {
__u64 fdr; /* IA32 fp except. data reg */
__u64 old_k1; /* old value of ar.k1 */
__u64 old_iob; /* old IOBase value */
- struct partial_page_list *ppl; /* partial page list for 4K page size issue */
+ struct ia64_partial_page_list *ppl; /* partial page list for 4K page size issue */
/* cached TLS descriptors. */
struct desc_struct tls_array[GDT_ENTRY_TLS_ENTRIES];
extern int __cpu_disable (void);
extern void __cpu_die (unsigned int cpu);
extern void cpu_die (void) __attribute__ ((noreturn));
-extern int __cpu_up (unsigned int cpu);
extern void __init smp_build_cpu_map(void);
extern void __init init_smp_config (void);
#define in_be32(addr) \
({ u32 __v = (*(__force volatile u32 *) (addr)); __v; })
#define in_le16(addr) \
- ({ u16 __v = le16_to_cpu(*(__force volatile u16 *) (addr)); __v; })
+ ({ u16 __v = le16_to_cpu(*(__force volatile __le16 *) (addr)); __v; })
#define in_le32(addr) \
- ({ u32 __v = le32_to_cpu(*(__force volatile u32 *) (addr)); __v; })
+ ({ u32 __v = le32_to_cpu(*(__force volatile __le32 *) (addr)); __v; })
#define out_8(addr,b) (void)((*(__force volatile u8 *) (addr)) = (b))
#define out_be16(addr,w) (void)((*(__force volatile u16 *) (addr)) = (w))
#define out_be32(addr,l) (void)((*(__force volatile u32 *) (addr)) = (l))
-#define out_le16(addr,w) (void)((*(__force volatile u16 *) (addr)) = cpu_to_le16(w))
-#define out_le32(addr,l) (void)((*(__force volatile u32 *) (addr)) = cpu_to_le32(l))
+#define out_le16(addr,w) (void)((*(__force volatile __le16 *) (addr)) = cpu_to_le16(w))
+#define out_le32(addr,l) (void)((*(__force volatile __le32 *) (addr)) = cpu_to_le32(l))
#define raw_inb in_8
#define raw_inw in_be16
# error HARDIRQ_BITS is too low!
#endif
+void ack_bad_irq(unsigned int irq);
+
#endif /* __M68K_HARDIRQ_H */
--- /dev/null
+#ifndef __M68KNOMMU_HW_IRQ_H__
+#define __M68KNOMMU_HW_IRQ_H__
+
+#endif /* __M68KNOMMU_HW_IRQ_H__ */
extern void config_BSP(char *command, int len);
extern void (*mach_tick)(void);
-extern void (*mach_trap_init)(void);
#endif /* _M68KNOMMU_MACHDEP_H */
#define MCFDMA_DIR_ASCEN 0x0800 /* Address Sequence Complete (Completion) interrupt enable */
#define MCFDMA_DIR_TEEN 0x0200 /* Transfer Error interrupt enable */
#define MCFDMA_DIR_TCEN 0x0100 /* Transfer Complete (a bus transfer, that is) interrupt enable */
-#define MCFDMA_DIR_INV 0x1000 /* Invalid Combination */
+#define MCFDMA_DIR_INV 0x0010 /* Invalid Combination */
#define MCFDMA_DIR_ASC 0x0008 /* Address Sequence Complete (DMA Completion) */
#define MCFDMA_DIR_TE 0x0002 /* Transfer Error */
#define MCFDMA_DIR_TC 0x0001 /* Transfer Complete */
({ \
unsigned char volatile *reset; \
asm("move.w #0x2700, %sr"); \
- reset = ((volatile unsigned short *)(MCF_IPSBAR + 0x110000)); \
+ reset = ((volatile unsigned char *)(MCF_IPSBAR + 0x110000)); \
while(1) \
*reset |= (0x01 << 7);\
})
({ \
unsigned char volatile *reset; \
asm("move.w #0x2700, %sr"); \
- reset = ((volatile unsigned short *)(MCF_IPSBAR + 0xA0000)); \
+ reset = ((volatile unsigned char *)(MCF_IPSBAR + 0xA0000)); \
while(1) \
*reset |= 0x80; \
})
-#include <asm-m68k/timex.h>
+/*
+ * linux/include/asm-m68knommu/timex.h
+ *
+ * m68knommu architecture timex specifications
+ */
+#ifndef _ASM_M68KNOMMU_TIMEX_H
+#define _ASM_M68KNOMMU_TIMEX_H
+
+#ifdef CONFIG_COLDFIRE
+#include <asm/coldfire.h>
+#define CLOCK_TICK_RATE MCF_CLK
+#else
+#define CLOCK_TICK_RATE 1193180 /* Underlying HZ */
+#endif
+
+typedef unsigned long cycles_t;
+
+static inline cycles_t get_cycles(void)
+{
+ return 0;
+}
+
+#endif
--- /dev/null
+#ifndef ASM_EDAC_H
+#define ASM_EDAC_H
+
+/* ECC atomic, DMA, SMP and interrupt safe scrub function */
+
+static inline void atomic_scrub(void *va, u32 size)
+{
+ unsigned long *virt_addr = va;
+ unsigned long temp;
+ u32 i;
+
+ for (i = 0; i < size / sizeof(unsigned long); i++, virt_addr++) {
+
+ /*
+ * Very carefully read and write to memory atomically
+ * so we are interrupt, DMA and SMP safe.
+ *
+ * Intel: asm("lock; addl $0, %0"::"m"(*virt_addr));
+ */
+
+ __asm__ __volatile__ (
+ " .set mips3 \n"
+ "1: ll %0, %1 # atomic_add \n"
+ " ll %0, %1 # atomic_add \n"
+ " addu %0, $0 \n"
+ " sc %0, %1 \n"
+ " beqz %0, 1b \n"
+ " .set mips0 \n"
+ : "=&r" (temp), "=m" (*virt_addr)
+ : "m" (*virt_addr));
+
+ }
+}
+
+#endif
#define ICACHE_REFILLS_WORKAROUND_WAR 1
#endif
-
/*
* On the R10000 upto version 2.6 (not sure about 2.7) there is a bug that
* may cause ll / sc and lld / scd sequences to execute non-atomically.
_EMIT_BUG_ENTRY \
: : "i" (__FILE__), "i" (__LINE__), "i" (0), \
"i" (sizeof(struct bug_entry)), \
- "r" ((long)(x))); \
+ "r" ((__force long)(x))); \
} \
} while (0)
extern int page_is_ram(unsigned long pfn);
struct vm_area_struct;
-extern const char *arch_vma_name(struct vm_area_struct *vma);
#include <asm-generic/memory_model.h>
#endif /* __ASSEMBLY__ */
* on Freescale PCI-e controllers since they used the PCI_PRIMARY_BUS
* to determine which bus number to match on when generating type0
* config cycles
+ * NO_PCIE_LINK - the Freescale PCI-e controllers have issues with
+ * hanging if we don't have link and try to do config cycles to
+ * anything but the PHB. Only allow talking to the PHB if this is
+ * set.
+ * BIG_ENDIAN - cfg_addr is a big endian register
*/
#define PPC_INDIRECT_TYPE_SET_CFG_TYPE (0x00000001)
#define PPC_INDIRECT_TYPE_EXT_REG (0x00000002)
#define PPC_INDIRECT_TYPE_SURPRESS_PRIMARY_BUS (0x00000004)
+#define PPC_INDIRECT_TYPE_NO_PCIE_LINK (0x00000008)
+#define PPC_INDIRECT_TYPE_BIG_ENDIAN (0x00000010)
u32 indirect_type;
/* Currently, we limit ourselves to 1 IO range and 3 mem
return bus->sysdata;
}
+static inline int isa_vaddr_is_ioport(void __iomem *address)
+{
+ /* No specific ISA handling on ppc32 at this stage, it
+ * all goes through PCI
+ */
+ return 0;
+}
+
/* These are used for config access before all the PCI probing
has been done. */
int early_read_config_byte(struct pci_controller *hose, int bus, int dev_fn,
int early_write_config_dword(struct pci_controller *hose, int bus, int dev_fn,
int where, u32 val);
-extern void setup_indirect_pci_nomap(struct pci_controller* hose,
- void __iomem *cfg_addr, void __iomem *cfg_data);
+extern int early_find_capability(struct pci_controller *hose, int bus,
+ int dev_fn, int cap);
+
extern void setup_indirect_pci(struct pci_controller* hose,
- u32 cfg_addr, u32 cfg_data);
+ u32 cfg_addr, u32 cfg_data, u32 flags);
extern void setup_grackle(struct pci_controller *hose);
+extern void __init update_bridge_resource(struct pci_dev *dev,
+ struct resource *res);
#else
extern void isa_bridge_find_early(struct pci_controller *hose);
+static inline int isa_vaddr_is_ioport(void __iomem *address)
+{
+ /* Check if address hits the reserved legacy IO range */
+ unsigned long ea = (unsigned long)address;
+ return ea >= ISA_IO_BASE && ea < ISA_IO_END;
+}
+
extern int pcibios_unmap_io_space(struct pci_bus *bus);
extern int pcibios_map_io_space(struct pci_bus *bus);
pcibios_alloc_controller(struct device_node *dev);
#ifdef CONFIG_PCI
extern unsigned long pci_address_to_pio(phys_addr_t address);
+extern int pcibios_vaddr_is_ioport(void __iomem *address);
#else
static inline unsigned long pci_address_to_pio(phys_addr_t address)
{
return (unsigned long)-1;
}
+static inline int pcibios_vaddr_is_ioport(void __iomem *address)
+{
+ return 0;
+}
#endif
.type GLUE(.,name),@function; \
GLUE(.,name):
+#define _INIT_STATIC(name) \
+ .section ".text.init.refok"; \
+ .align 2 ; \
+ .section ".opd","aw"; \
+name: \
+ .quad GLUE(.,name); \
+ .quad .TOC.@tocbase; \
+ .quad 0; \
+ .previous; \
+ .type GLUE(.,name),@function; \
+GLUE(.,name):
+
#else /* 32-bit */
#define _GLOBAL(n) \
extern struct vio_dev *vio_find_node(struct device_node *vnode);
extern int vio_enable_interrupts(struct vio_dev *dev);
extern int vio_disable_interrupts(struct vio_dev *dev);
+#else
+static inline int vio_enable_interrupts(struct vio_dev *dev)
+{
+ return 0;
+}
#endif
static inline struct vio_driver *to_vio_driver(struct device_driver *drv)
}
extern int acpi_irq_balance_set(char *str);
+/* routines for saving/restoring kernel state */
+extern int acpi_save_state_mem(void);
+extern void acpi_restore_state_mem(void);
+
+extern unsigned long acpi_wakeup_address;
+
+/* early initialization routine */
+extern void acpi_reserve_bootmem(void);
+
#else /* !CONFIG_ACPI */
#define acpi_lapic 0
extern int acpi_scan_nodes(unsigned long start, unsigned long end);
#define NR_NODE_MEMBLKS (MAX_NUMNODES*2)
-#ifdef CONFIG_ACPI_SLEEP
-
-/* routines for saving/restoring kernel state */
-extern int acpi_save_state_mem(void);
-extern void acpi_restore_state_mem(void);
-
-extern unsigned long acpi_wakeup_address;
-
-/* early initialization routine */
-extern void acpi_reserve_bootmem(void);
-
-#endif /*CONFIG_ACPI_SLEEP*/
-
extern int acpi_disabled;
extern int acpi_pci_disabled;
--- /dev/null
+#include <asm-i386/ist.h>
extern void fix_processor_context(void);
-#ifdef CONFIG_ACPI_SLEEP
extern unsigned long saved_rip;
extern unsigned long saved_rsp;
extern unsigned long saved_rbp;
/* routines for saving/restoring kernel state */
extern int acpi_save_state_mem(void);
-#endif
case 8: __get_user_x(8,__ret_gu,__val_gu,ptr); break; \
default: __get_user_bad(); break; \
} \
- (x) = (typeof(*(ptr)))__val_gu; \
+ (x) = (__force typeof(*(ptr)))__val_gu; \
__ret_gu; \
})
int __gu_err; \
unsigned long __gu_val; \
__get_user_size(__gu_val,(ptr),(size),__gu_err); \
- (x) = (typeof(*(ptr)))__gu_val; \
+ (x) = (__force typeof(*(ptr)))__gu_val; \
__gu_err; \
})
#ifdef __KERNEL__
#include <asm/byteorder.h>
+#include <asm/page.h>
#include <linux/types.h>
#endif
#include <linux/list.h>
+#include <linux/mod_devicetable.h>
#include <acpi/acpi.h>
#include <acpi/acpi_bus.h>
#ifdef __KERNEL__
+#include <linux/types.h>
+
#define APM_CS (GDT_ENTRY_APMBIOS_BASE * 8)
#define APM_CS_16 (APM_CS + 8)
#define APM_DS (APM_CS_16 + 8)
struct apm_bios_info {
- unsigned short version;
- unsigned short cseg;
- unsigned long offset;
- unsigned short cseg_16;
- unsigned short dseg;
- unsigned short flags;
- unsigned short cseg_len;
- unsigned short cseg_16_len;
- unsigned short dseg_len;
+ u16 version;
+ u16 cseg;
+ u32 offset;
+ u16 cseg_16;
+ u16 dseg;
+ u16 flags;
+ u16 cseg_len;
+ u16 cseg_16_len;
+ u16 dseg_len;
};
/* Results of APM Installation Check */
struct scsi_ioctl_command;
struct request_queue;
-typedef struct request_queue request_queue_t;
+typedef struct request_queue request_queue_t __deprecated;
struct elevator_queue;
typedef struct elevator_queue elevator_t;
struct request_pm_state;
struct list_head queuelist;
struct list_head donelist;
- request_queue_t *q;
+ struct request_queue *q;
unsigned int cmd_flags;
enum rq_cmd_type_bits cmd_type;
#include <linux/elevator.h>
-typedef void (request_fn_proc) (request_queue_t *q);
-typedef int (make_request_fn) (request_queue_t *q, struct bio *bio);
-typedef int (prep_rq_fn) (request_queue_t *, struct request *);
-typedef void (unplug_fn) (request_queue_t *);
+typedef void (request_fn_proc) (struct request_queue *q);
+typedef int (make_request_fn) (struct request_queue *q, struct bio *bio);
+typedef int (prep_rq_fn) (struct request_queue *, struct request *);
+typedef void (unplug_fn) (struct request_queue *);
struct bio_vec;
-typedef int (merge_bvec_fn) (request_queue_t *, struct bio *, struct bio_vec *);
-typedef int (issue_flush_fn) (request_queue_t *, struct gendisk *, sector_t *);
-typedef void (prepare_flush_fn) (request_queue_t *, struct request *);
+typedef int (merge_bvec_fn) (struct request_queue *, struct bio *, struct bio_vec *);
+typedef int (issue_flush_fn) (struct request_queue *, struct gendisk *, sector_t *);
+typedef void (prepare_flush_fn) (struct request_queue *, struct request *);
typedef void (softirq_done_fn)(struct request *);
enum blk_queue_state {
#define QUEUE_FLAG_CLUSTER 0 /* cluster several segments into 1 */
#define QUEUE_FLAG_QUEUED 1 /* uses generic tag queueing */
#define QUEUE_FLAG_STOPPED 2 /* queue is stopped */
-#define QUEUE_FLAG_READFULL 3 /* write queue has been filled */
-#define QUEUE_FLAG_WRITEFULL 4 /* read queue has been filled */
+#define QUEUE_FLAG_READFULL 3 /* read queue has been filled */
+#define QUEUE_FLAG_WRITEFULL 4 /* write queue has been filled */
#define QUEUE_FLAG_DEAD 5 /* queue being torn down */
#define QUEUE_FLAG_REENTER 6 /* Re-entrancy avoidance */
#define QUEUE_FLAG_PLUGGED 7 /* queue is plugged */
#ifdef CONFIG_BOUNCE
extern int init_emergency_isa_pool(void);
-extern void blk_queue_bounce(request_queue_t *q, struct bio **bio);
+extern void blk_queue_bounce(struct request_queue *q, struct bio **bio);
#else
static inline int init_emergency_isa_pool(void)
{
return 0;
}
-static inline void blk_queue_bounce(request_queue_t *q, struct bio **bio)
+static inline void blk_queue_bounce(struct request_queue *q, struct bio **bio)
{
}
#endif /* CONFIG_MMU */
extern void register_disk(struct gendisk *dev);
extern void generic_make_request(struct bio *bio);
extern void blk_put_request(struct request *);
-extern void __blk_put_request(request_queue_t *, struct request *);
+extern void __blk_put_request(struct request_queue *, struct request *);
extern void blk_end_sync_rq(struct request *rq, int error);
-extern struct request *blk_get_request(request_queue_t *, int, gfp_t);
-extern void blk_insert_request(request_queue_t *, struct request *, int, void *);
-extern void blk_requeue_request(request_queue_t *, struct request *);
-extern void blk_plug_device(request_queue_t *);
-extern int blk_remove_plug(request_queue_t *);
-extern void blk_recount_segments(request_queue_t *, struct bio *);
+extern struct request *blk_get_request(struct request_queue *, int, gfp_t);
+extern void blk_insert_request(struct request_queue *, struct request *, int, void *);
+extern void blk_requeue_request(struct request_queue *, struct request *);
+extern void blk_plug_device(struct request_queue *);
+extern int blk_remove_plug(struct request_queue *);
+extern void blk_recount_segments(struct request_queue *, struct bio *);
extern int scsi_cmd_ioctl(struct file *, struct request_queue *,
struct gendisk *, unsigned int, void __user *);
extern int sg_scsi_ioctl(struct file *, struct request_queue *,
/*
* Temporary export, until SCSI gets fixed up.
*/
-extern int ll_back_merge_fn(request_queue_t *, struct request *, struct bio *);
+extern int ll_back_merge_fn(struct request_queue *, struct request *,
+ struct bio *);
/*
* A queue has just exitted congestion. Note this in the global counter of
* congested queues, and wake up anyone who was waiting for requests to be
* put back.
*/
-static inline void blk_clear_queue_congested(request_queue_t *q, int rw)
+static inline void blk_clear_queue_congested(struct request_queue *q, int rw)
{
clear_bdi_congested(&q->backing_dev_info, rw);
}
* A queue has just entered congestion. Flag that in the queue's VM-visible
* state flags and increment the global gounter of congested queues.
*/
-static inline void blk_set_queue_congested(request_queue_t *q, int rw)
+static inline void blk_set_queue_congested(struct request_queue *q, int rw)
{
set_bdi_congested(&q->backing_dev_info, rw);
}
-extern void blk_start_queue(request_queue_t *q);
-extern void blk_stop_queue(request_queue_t *q);
+extern void blk_start_queue(struct request_queue *q);
+extern void blk_stop_queue(struct request_queue *q);
extern void blk_sync_queue(struct request_queue *q);
-extern void __blk_stop_queue(request_queue_t *q);
-extern void blk_run_queue(request_queue_t *);
-extern void blk_start_queueing(request_queue_t *);
-extern int blk_rq_map_user(request_queue_t *, struct request *, void __user *, unsigned long);
+extern void __blk_stop_queue(struct request_queue *q);
+extern void blk_run_queue(struct request_queue *);
+extern void blk_start_queueing(struct request_queue *);
+extern int blk_rq_map_user(struct request_queue *, struct request *, void __user *, unsigned long);
extern int blk_rq_unmap_user(struct bio *);
-extern int blk_rq_map_kern(request_queue_t *, struct request *, void *, unsigned int, gfp_t);
-extern int blk_rq_map_user_iov(request_queue_t *, struct request *,
+extern int blk_rq_map_kern(struct request_queue *, struct request *, void *, unsigned int, gfp_t);
+extern int blk_rq_map_user_iov(struct request_queue *, struct request *,
struct sg_iovec *, int, unsigned int);
-extern int blk_execute_rq(request_queue_t *, struct gendisk *,
+extern int blk_execute_rq(struct request_queue *, struct gendisk *,
struct request *, int);
-extern void blk_execute_rq_nowait(request_queue_t *, struct gendisk *,
+extern void blk_execute_rq_nowait(struct request_queue *, struct gendisk *,
struct request *, int, rq_end_io_fn *);
extern int blk_verify_command(unsigned char *, int);
-static inline request_queue_t *bdev_get_queue(struct block_device *bdev)
+static inline struct request_queue *bdev_get_queue(struct block_device *bdev)
{
return bdev->bd_disk->queue;
}
/*
* Access functions for manipulating queue properties
*/
-extern request_queue_t *blk_init_queue_node(request_fn_proc *rfn,
+extern struct request_queue *blk_init_queue_node(request_fn_proc *rfn,
spinlock_t *lock, int node_id);
-extern request_queue_t *blk_init_queue(request_fn_proc *, spinlock_t *);
-extern void blk_cleanup_queue(request_queue_t *);
-extern void blk_queue_make_request(request_queue_t *, make_request_fn *);
-extern void blk_queue_bounce_limit(request_queue_t *, u64);
-extern void blk_queue_max_sectors(request_queue_t *, unsigned int);
-extern void blk_queue_max_phys_segments(request_queue_t *, unsigned short);
-extern void blk_queue_max_hw_segments(request_queue_t *, unsigned short);
-extern void blk_queue_max_segment_size(request_queue_t *, unsigned int);
-extern void blk_queue_hardsect_size(request_queue_t *, unsigned short);
-extern void blk_queue_stack_limits(request_queue_t *t, request_queue_t *b);
-extern void blk_queue_segment_boundary(request_queue_t *, unsigned long);
-extern void blk_queue_prep_rq(request_queue_t *, prep_rq_fn *pfn);
-extern void blk_queue_merge_bvec(request_queue_t *, merge_bvec_fn *);
-extern void blk_queue_dma_alignment(request_queue_t *, int);
-extern void blk_queue_softirq_done(request_queue_t *, softirq_done_fn *);
+extern struct request_queue *blk_init_queue(request_fn_proc *, spinlock_t *);
+extern void blk_cleanup_queue(struct request_queue *);
+extern void blk_queue_make_request(struct request_queue *, make_request_fn *);
+extern void blk_queue_bounce_limit(struct request_queue *, u64);
+extern void blk_queue_max_sectors(struct request_queue *, unsigned int);
+extern void blk_queue_max_phys_segments(struct request_queue *, unsigned short);
+extern void blk_queue_max_hw_segments(struct request_queue *, unsigned short);
+extern void blk_queue_max_segment_size(struct request_queue *, unsigned int);
+extern void blk_queue_hardsect_size(struct request_queue *, unsigned short);
+extern void blk_queue_stack_limits(struct request_queue *t, struct request_queue *b);
+extern void blk_queue_segment_boundary(struct request_queue *, unsigned long);
+extern void blk_queue_prep_rq(struct request_queue *, prep_rq_fn *pfn);
+extern void blk_queue_merge_bvec(struct request_queue *, merge_bvec_fn *);
+extern void blk_queue_dma_alignment(struct request_queue *, int);
+extern void blk_queue_softirq_done(struct request_queue *, softirq_done_fn *);
extern struct backing_dev_info *blk_get_backing_dev_info(struct block_device *bdev);
-extern int blk_queue_ordered(request_queue_t *, unsigned, prepare_flush_fn *);
-extern void blk_queue_issue_flush_fn(request_queue_t *, issue_flush_fn *);
-extern int blk_do_ordered(request_queue_t *, struct request **);
-extern unsigned blk_ordered_cur_seq(request_queue_t *);
+extern int blk_queue_ordered(struct request_queue *, unsigned, prepare_flush_fn *);
+extern void blk_queue_issue_flush_fn(struct request_queue *, issue_flush_fn *);
+extern int blk_do_ordered(struct request_queue *, struct request **);
+extern unsigned blk_ordered_cur_seq(struct request_queue *);
extern unsigned blk_ordered_req_seq(struct request *);
-extern void blk_ordered_complete_seq(request_queue_t *, unsigned, int);
+extern void blk_ordered_complete_seq(struct request_queue *, unsigned, int);
-extern int blk_rq_map_sg(request_queue_t *, struct request *, struct scatterlist *);
+extern int blk_rq_map_sg(struct request_queue *, struct request *, struct scatterlist *);
extern void blk_dump_rq_flags(struct request *, char *);
-extern void generic_unplug_device(request_queue_t *);
-extern void __generic_unplug_device(request_queue_t *);
+extern void generic_unplug_device(struct request_queue *);
+extern void __generic_unplug_device(struct request_queue *);
extern long nr_blockdev_pages(void);
-int blk_get_queue(request_queue_t *);
-request_queue_t *blk_alloc_queue(gfp_t);
-request_queue_t *blk_alloc_queue_node(gfp_t, int);
-extern void blk_put_queue(request_queue_t *);
+int blk_get_queue(struct request_queue *);
+struct request_queue *blk_alloc_queue(gfp_t);
+struct request_queue *blk_alloc_queue_node(gfp_t, int);
+extern void blk_put_queue(struct request_queue *);
/*
* tag stuff
#define blk_queue_tag_depth(q) ((q)->queue_tags->busy)
#define blk_queue_tag_queue(q) ((q)->queue_tags->busy < (q)->queue_tags->max_depth)
#define blk_rq_tagged(rq) ((rq)->cmd_flags & REQ_QUEUED)
-extern int blk_queue_start_tag(request_queue_t *, struct request *);
-extern struct request *blk_queue_find_tag(request_queue_t *, int);
-extern void blk_queue_end_tag(request_queue_t *, struct request *);
-extern int blk_queue_init_tags(request_queue_t *, int, struct blk_queue_tag *);
-extern void blk_queue_free_tags(request_queue_t *);
-extern int blk_queue_resize_tags(request_queue_t *, int);
-extern void blk_queue_invalidate_tags(request_queue_t *);
+extern int blk_queue_start_tag(struct request_queue *, struct request *);
+extern struct request *blk_queue_find_tag(struct request_queue *, int);
+extern void blk_queue_end_tag(struct request_queue *, struct request *);
+extern int blk_queue_init_tags(struct request_queue *, int, struct blk_queue_tag *);
+extern void blk_queue_free_tags(struct request_queue *);
+extern int blk_queue_resize_tags(struct request_queue *, int);
+extern void blk_queue_invalidate_tags(struct request_queue *);
extern struct blk_queue_tag *blk_init_tags(int);
extern void blk_free_tags(struct blk_queue_tag *);
return bqt->tag_index[tag];
}
-extern void blk_rq_bio_prep(request_queue_t *, struct request *, struct bio *);
+extern void blk_rq_bio_prep(struct request_queue *, struct request *, struct bio *);
extern int blkdev_issue_flush(struct block_device *, sector_t *);
#define MAX_PHYS_SEGMENTS 128
#define blkdev_entry_to_request(entry) list_entry((entry), struct request, queuelist)
-static inline int queue_hardsect_size(request_queue_t *q)
+static inline int queue_hardsect_size(struct request_queue *q)
{
int retval = 512;
return queue_hardsect_size(bdev_get_queue(bdev));
}
-static inline int queue_dma_alignment(request_queue_t *q)
+static inline int queue_dma_alignment(struct request_queue *q)
{
int retval = 511;
#if defined(CONFIG_BLK_DEV_IO_TRACE)
extern int blk_trace_ioctl(struct block_device *, unsigned, char __user *);
-extern void blk_trace_shutdown(request_queue_t *);
+extern void blk_trace_shutdown(struct request_queue *);
extern void __blk_add_trace(struct blk_trace *, sector_t, int, int, u32, int, int, void *);
/**
# define __acquire(x) __context__(x,1)
# define __release(x) __context__(x,-1)
# define __cond_lock(x,c) ((c) ? ({ __acquire(x); 1; }) : 0)
-extern void __chk_user_ptr(const void __user *);
-extern void __chk_io_ptr(const void __iomem *);
+extern void __chk_user_ptr(const volatile void __user *);
+extern void __chk_io_ptr(const volatile void __iomem *);
#else
# define __user
# define __kernel
/* drivers/base/power/shutdown.c */
extern void device_shutdown(void);
+/* drivers/base/sys.c */
+extern void sysdev_shutdown(void);
+
/* drivers/base/firmware.c */
extern int __must_check firmware_register(struct kset *);
#ifdef CONFIG_BLOCK
-typedef int (elevator_merge_fn) (request_queue_t *, struct request **,
+typedef int (elevator_merge_fn) (struct request_queue *, struct request **,
struct bio *);
-typedef void (elevator_merge_req_fn) (request_queue_t *, struct request *, struct request *);
+typedef void (elevator_merge_req_fn) (struct request_queue *, struct request *, struct request *);
-typedef void (elevator_merged_fn) (request_queue_t *, struct request *, int);
+typedef void (elevator_merged_fn) (struct request_queue *, struct request *, int);
-typedef int (elevator_allow_merge_fn) (request_queue_t *, struct request *, struct bio *);
+typedef int (elevator_allow_merge_fn) (struct request_queue *, struct request *, struct bio *);
-typedef int (elevator_dispatch_fn) (request_queue_t *, int);
+typedef int (elevator_dispatch_fn) (struct request_queue *, int);
-typedef void (elevator_add_req_fn) (request_queue_t *, struct request *);
-typedef int (elevator_queue_empty_fn) (request_queue_t *);
-typedef struct request *(elevator_request_list_fn) (request_queue_t *, struct request *);
-typedef void (elevator_completed_req_fn) (request_queue_t *, struct request *);
-typedef int (elevator_may_queue_fn) (request_queue_t *, int);
+typedef void (elevator_add_req_fn) (struct request_queue *, struct request *);
+typedef int (elevator_queue_empty_fn) (struct request_queue *);
+typedef struct request *(elevator_request_list_fn) (struct request_queue *, struct request *);
+typedef void (elevator_completed_req_fn) (struct request_queue *, struct request *);
+typedef int (elevator_may_queue_fn) (struct request_queue *, int);
-typedef int (elevator_set_req_fn) (request_queue_t *, struct request *, gfp_t);
+typedef int (elevator_set_req_fn) (struct request_queue *, struct request *, gfp_t);
typedef void (elevator_put_req_fn) (struct request *);
-typedef void (elevator_activate_req_fn) (request_queue_t *, struct request *);
-typedef void (elevator_deactivate_req_fn) (request_queue_t *, struct request *);
+typedef void (elevator_activate_req_fn) (struct request_queue *, struct request *);
+typedef void (elevator_deactivate_req_fn) (struct request_queue *, struct request *);
-typedef void *(elevator_init_fn) (request_queue_t *);
+typedef void *(elevator_init_fn) (struct request_queue *);
typedef void (elevator_exit_fn) (elevator_t *);
struct elevator_ops
/*
* block elevator interface
*/
-extern void elv_dispatch_sort(request_queue_t *, struct request *);
-extern void elv_dispatch_add_tail(request_queue_t *, struct request *);
-extern void elv_add_request(request_queue_t *, struct request *, int, int);
-extern void __elv_add_request(request_queue_t *, struct request *, int, int);
-extern void elv_insert(request_queue_t *, struct request *, int);
-extern int elv_merge(request_queue_t *, struct request **, struct bio *);
-extern void elv_merge_requests(request_queue_t *, struct request *,
+extern void elv_dispatch_sort(struct request_queue *, struct request *);
+extern void elv_dispatch_add_tail(struct request_queue *, struct request *);
+extern void elv_add_request(struct request_queue *, struct request *, int, int);
+extern void __elv_add_request(struct request_queue *, struct request *, int, int);
+extern void elv_insert(struct request_queue *, struct request *, int);
+extern int elv_merge(struct request_queue *, struct request **, struct bio *);
+extern void elv_merge_requests(struct request_queue *, struct request *,
struct request *);
-extern void elv_merged_request(request_queue_t *, struct request *, int);
-extern void elv_dequeue_request(request_queue_t *, struct request *);
-extern void elv_requeue_request(request_queue_t *, struct request *);
-extern int elv_queue_empty(request_queue_t *);
+extern void elv_merged_request(struct request_queue *, struct request *, int);
+extern void elv_dequeue_request(struct request_queue *, struct request *);
+extern void elv_requeue_request(struct request_queue *, struct request *);
+extern int elv_queue_empty(struct request_queue *);
extern struct request *elv_next_request(struct request_queue *q);
-extern struct request *elv_former_request(request_queue_t *, struct request *);
-extern struct request *elv_latter_request(request_queue_t *, struct request *);
-extern int elv_register_queue(request_queue_t *q);
-extern void elv_unregister_queue(request_queue_t *q);
-extern int elv_may_queue(request_queue_t *, int);
-extern void elv_completed_request(request_queue_t *, struct request *);
-extern int elv_set_request(request_queue_t *, struct request *, gfp_t);
-extern void elv_put_request(request_queue_t *, struct request *);
+extern struct request *elv_former_request(struct request_queue *, struct request *);
+extern struct request *elv_latter_request(struct request_queue *, struct request *);
+extern int elv_register_queue(struct request_queue *q);
+extern void elv_unregister_queue(struct request_queue *q);
+extern int elv_may_queue(struct request_queue *, int);
+extern void elv_completed_request(struct request_queue *, struct request *);
+extern int elv_set_request(struct request_queue *, struct request *, gfp_t);
+extern void elv_put_request(struct request_queue *, struct request *);
/*
* io scheduler registration
/*
* io scheduler sysfs switching
*/
-extern ssize_t elv_iosched_show(request_queue_t *, char *);
-extern ssize_t elv_iosched_store(request_queue_t *, const char *, size_t);
+extern ssize_t elv_iosched_show(struct request_queue *, char *);
+extern ssize_t elv_iosched_store(struct request_queue *, const char *, size_t);
-extern int elevator_init(request_queue_t *, char *);
+extern int elevator_init(struct request_queue *, char *);
extern void elevator_exit(elevator_t *);
extern int elv_rq_merge_ok(struct request *, struct bio *);
/*
* Helper functions.
*/
-extern struct request *elv_rb_former_request(request_queue_t *, struct request *);
-extern struct request *elv_rb_latter_request(request_queue_t *, struct request *);
+extern struct request *elv_rb_former_request(struct request_queue *, struct request *);
+extern struct request *elv_rb_latter_request(struct request_queue *, struct request *);
/*
* rb support functions.
char name[4]; /* drive name, such as "hda" */
char driver_req[10]; /* requests specific driver */
- request_queue_t *queue; /* request queue */
+ struct request_queue *queue; /* request queue */
struct request *rq; /* current request */
struct ide_drive_s *next; /* circular list of hwgroup drives */
extern int ide_spin_wait_hwgroup(ide_drive_t *);
extern void ide_timer_expiry(unsigned long);
extern irqreturn_t ide_intr(int irq, void *dev_id);
-extern void do_ide_request(request_queue_t *);
+extern void do_ide_request(struct request_queue *);
void ide_init_disk(struct gendisk *, ide_drive_t *);
#define LG_CLOCK_MIN_DELTA 100UL
#define LG_CLOCK_MAX_DELTA ULONG_MAX
+/*G:031 First, how does our Guest contact the Host to ask for privileged
+ * operations? There are two ways: the direct way is to make a "hypercall",
+ * to make requests of the Host Itself.
+ *
+ * Our hypercall mechanism uses the highest unused trap code (traps 32 and
+ * above are used by real hardware interrupts). Seventeen hypercalls are
+ * available: the hypercall number is put in the %eax register, and the
+ * arguments (when required) are placed in %edx, %ebx and %ecx. If a return
+ * value makes sense, it's returned in %eax.
+ *
+ * Grossly invalid calls result in Sudden Death at the hands of the vengeful
+ * Host, rather than returning failure. This reflects Winston Churchill's
+ * definition of a gentleman: "someone who is only rude intentionally". */
#define LGUEST_TRAP_ENTRY 0x1F
static inline unsigned long
hcall(unsigned long call,
unsigned long arg1, unsigned long arg2, unsigned long arg3)
{
+ /* "int" is the Intel instruction to trigger a trap. */
asm volatile("int $" __stringify(LGUEST_TRAP_ENTRY)
+ /* The call is in %eax (aka "a"), and can be replaced */
: "=a"(call)
+ /* The other arguments are in %eax, %edx, %ebx & %ecx */
: "a"(call), "d"(arg1), "b"(arg2), "c"(arg3)
+ /* "memory" means this might write somewhere in memory.
+ * This isn't true for all calls, but it's safe to tell
+ * gcc that it might happen so it doesn't get clever. */
: "memory");
return call;
}
+/*:*/
void async_hcall(unsigned long call,
unsigned long arg1, unsigned long arg2, unsigned long arg3);
u32 eax, edx, ebx, ecx;
};
-/* All the good stuff happens here: guest registers it with LGUEST_INIT */
+/*G:032 The second method of communicating with the Host is to via "struct
+ * lguest_data". The Guest's very first hypercall is to tell the Host where
+ * this is, and then the Guest and Host both publish information in it. :*/
struct lguest_data
{
-/* Fields which change during running: */
- /* 512 == enabled (same as eflags) */
+ /* 512 == enabled (same as eflags in normal hardware). The Guest
+ * changes interrupts so often that a hypercall is too slow. */
unsigned int irq_enabled;
- /* Interrupts blocked by guest. */
+ /* Fine-grained interrupt disabling by the Guest */
DECLARE_BITMAP(blocked_interrupts, LGUEST_IRQS);
- /* Virtual address of page fault. */
+ /* The Host writes the virtual address of the last page fault here,
+ * which saves the Guest a hypercall. CR2 is the native register where
+ * this address would normally be found. */
unsigned long cr2;
- /* Async hypercall ring. 0xFF == done, 0 == pending. */
+ /* Async hypercall ring. Instead of directly making hypercalls, we can
+ * place them in here for processing the next time the Host wants.
+ * This batching can be quite efficient. */
+
+ /* 0xFF == done (set by Host), 0 == pending (set by Guest). */
u8 hcall_status[LHCALL_RING_SIZE];
+ /* The actual registers for the hypercalls. */
struct hcall_ring hcalls[LHCALL_RING_SIZE];
-/* Fields initialized by the hypervisor at boot: */
+/* Fields initialized by the Host at boot: */
/* Memory not to try to access */
unsigned long reserve_mem;
- /* ID of this guest (used by network driver to set ethernet address) */
+ /* ID of this Guest (used by network driver to set ethernet address) */
u16 guestid;
/* KHz for the TSC clock. */
u32 tsc_khz;
-/* Fields initialized by the guest at boot: */
+/* Fields initialized by the Guest at boot: */
/* Instruction range to suppress interrupts even if enabled */
unsigned long noirq_start, noirq_end;
};
void *private;
};
-/* By convention, each device can use irq index+1 if it wants to. */
+/*D:380 Since interrupt numbers are arbitrary, we use a convention: each device
+ * can use the interrupt number corresponding to its index. The +1 is because
+ * interrupt 0 is not usable (it's actually the timer interrupt). */
static inline int lgdev_irq(const struct lguest_device *dev)
{
return dev->index + 1;
}
+/*:*/
/* dma args must not be vmalloced! */
void lguest_send_dma(unsigned long key, struct lguest_dma *dma);
/* How many devices? Assume each one wants up to two dma arrays per device. */
#define LGUEST_MAX_DEVICES (LGUEST_MAX_DMA/2)
+/*D:200
+ * Lguest I/O
+ *
+ * The lguest I/O mechanism is the only way Guests can talk to devices. There
+ * are two hypercalls involved: SEND_DMA for output and BIND_DMA for input. In
+ * each case, "struct lguest_dma" describes the buffer: this contains 16
+ * addr/len pairs, and if there are fewer buffer elements the len array is
+ * terminated with a 0.
+ *
+ * I/O is organized by keys: BIND_DMA attaches buffers to a particular key, and
+ * SEND_DMA transfers to buffers bound to particular key. By convention, keys
+ * correspond to a physical address within the device's page. This means that
+ * devices will never accidentally end up with the same keys, and allows the
+ * Host use The Futex Trick (as we'll see later in our journey).
+ *
+ * SEND_DMA simply indicates a key to send to, and the physical address of the
+ * "struct lguest_dma" to send. The Host will write the number of bytes
+ * transferred into the "struct lguest_dma"'s used_len member.
+ *
+ * BIND_DMA indicates a key to bind to, a pointer to an array of "struct
+ * lguest_dma"s ready for receiving, the size of that array, and an interrupt
+ * to trigger when data is received. The Host will only allow transfers into
+ * buffers with a used_len of zero: it then sets used_len to the number of
+ * bytes transferred and triggers the interrupt for the Guest to process the
+ * new input. */
struct lguest_dma
{
- /* 0 if free to be used, filled by hypervisor. */
+ /* 0 if free to be used, filled by the Host. */
u32 used_len;
unsigned long addr[LGUEST_MAX_DMA_SECTIONS];
u16 len[LGUEST_MAX_DMA_SECTIONS];
};
+/*:*/
+/*D:460 This is the layout of a block device memory page. The Launcher sets up
+ * the num_sectors initially to tell the Guest the size of the disk. The Guest
+ * puts the type, sector and length of the request in the first three fields,
+ * then DMAs to the Host. The Host processes the request, sets up the result,
+ * then DMAs back to the Guest. */
struct lguest_block_page
{
/* 0 is a read, 1 is a write. */
u32 num_sectors; /* Disk length = num_sectors * 512 */
};
-/* There is a shared page of these. */
+/*D:520 The network device is basically a memory page where all the Guests on
+ * the network publish their MAC (ethernet) addresses: it's an array of "struct
+ * lguest_net": */
struct lguest_net
{
/* Simply the mac address (with multicast bit meaning promisc). */
unsigned char mac[6];
};
+/*:*/
/* Where the Host expects the Guest to SEND_DMA console output to. */
#define LGUEST_CONSOLE_DMA_KEY 0
-/* We have a page of these descriptors in the lguest_device page. */
+/*D:010
+ * Drivers
+ *
+ * The Guest needs devices to do anything useful. Since we don't let it touch
+ * real devices (think of the damage it could do!) we provide virtual devices.
+ * We could emulate a PCI bus with various devices on it, but that is a fairly
+ * complex burden for the Host and suboptimal for the Guest, so we have our own
+ * "lguest" bus and simple drivers.
+ *
+ * Devices are described by an array of LGUEST_MAX_DEVICES of these structs,
+ * placed by the Launcher just above the top of physical memory:
+ */
struct lguest_device_desc {
+ /* The device type: console, network, disk etc. */
u16 type;
#define LGUEST_DEVICE_T_CONSOLE 1
#define LGUEST_DEVICE_T_NET 2
#define LGUEST_DEVICE_T_BLOCK 3
+ /* The specific features of this device: these depends on device type
+ * except for LGUEST_DEVICE_F_RANDOMNESS. */
u16 features;
#define LGUEST_NET_F_NOCSUM 0x4000 /* Don't bother checksumming */
#define LGUEST_DEVICE_F_RANDOMNESS 0x8000 /* IRQ is fairly random */
+ /* This is how the Guest reports status of the device: the Host can set
+ * LGUEST_DEVICE_S_REMOVED to indicate removal, but the rest are only
+ * ever manipulated by the Guest, and only ever set. */
u16 status;
/* 256 and above are device specific. */
#define LGUEST_DEVICE_S_ACKNOWLEDGE 1 /* We have seen device. */
#define LGUEST_DEVICE_S_REMOVED_ACK 16 /* Driver has been told. */
#define LGUEST_DEVICE_S_FAILED 128 /* Something actually failed */
+ /* Each device exists somewhere in Guest physical memory, over some
+ * number of pages. */
u16 num_pages;
u32 pfn;
};
+/*:*/
/* Write command first word is a request. */
enum lguest_req
ATA_HOST_SIMPLEX = (1 << 0), /* Host is simplex, one DMA channel per host only */
ATA_HOST_STARTED = (1 << 1), /* Host started */
+ /* bits 24:31 of host->flags are reserved for LLD specific flags */
+
/* various lengths of time */
ATA_TMOUT_BOOT = 30 * HZ, /* heuristic */
ATA_TMOUT_BOOT_QUICK = 7 * HZ, /* heuristic */
struct task_struct *lo_thread;
wait_queue_head_t lo_event;
- request_queue_t *lo_queue;
+ struct request_queue *lo_queue;
struct gendisk *lo_disk;
struct list_head lo_list;
};
extern int randomize_va_space;
#endif
-__attribute__((weak)) const char *arch_vma_name(struct vm_area_struct *vma);
+const char * arch_vma_name(struct vm_area_struct *vma);
#endif /* __KERNEL__ */
#endif /* _LINUX_MM_H */
struct mmc_host;
struct mmc_card;
-extern int mmc_wait_for_req(struct mmc_host *, struct mmc_request *);
+extern void mmc_wait_for_req(struct mmc_host *, struct mmc_request *);
extern int mmc_wait_for_cmd(struct mmc_host *, struct mmc_command *, int);
extern int mmc_wait_for_app_cmd(struct mmc_host *, struct mmc_card *,
struct mmc_command *, int);
#define AP_DEVICE_ID_MATCH_DEVICE_TYPE 0x01
+#define ACPI_ID_LEN 9
+
+struct acpi_device_id {
+ __u8 id[ACPI_ID_LEN];
+ kernel_ulong_t driver_data;
+};
#define PNP_ID_LEN 8
#define PNP_MAX_DEVICES 8
struct xt_connlimit_info {
union {
- u_int32_t v4_mask;
- u_int32_t v6_mask[4];
+ __be32 v4_mask;
+ __be32 v6_mask[4];
};
unsigned int limit, inverse;
int __must_check pci_enable_device(struct pci_dev *dev);
int __must_check pci_enable_device_bars(struct pci_dev *dev, int mask);
+int __must_check __pci_reenable_device(struct pci_dev *);
int __must_check pcim_enable_device(struct pci_dev *pdev);
void pcim_pin_device(struct pci_dev *pdev);
#define PCI_DEVICE_ID_NVIDIA_NVENET_25 0x054D
#define PCI_DEVICE_ID_NVIDIA_NVENET_26 0x054E
#define PCI_DEVICE_ID_NVIDIA_NVENET_27 0x054F
+#define PCI_DEVICE_ID_NVIDIA_NVENET_28 0x07DC
+#define PCI_DEVICE_ID_NVIDIA_NVENET_29 0x07DD
+#define PCI_DEVICE_ID_NVIDIA_NVENET_30 0x07DE
+#define PCI_DEVICE_ID_NVIDIA_NVENET_31 0x07DF
#define PCI_DEVICE_ID_NVIDIA_NFORCE_MCP67_IDE 0x0560
#define PCI_DEVICE_ID_NVIDIA_NFORCE_MCP73_IDE 0x056C
#define PCI_DEVICE_ID_NVIDIA_NFORCE_MCP77_IDE 0x0759
#define PCI_VENDOR_ID_ENE 0x1524
#define PCI_DEVICE_ID_ENE_CB712_SD 0x0550
#define PCI_DEVICE_ID_ENE_CB712_SD_2 0x0551
+#define PCI_DEVICE_ID_ENE_CB714_SD 0x0750
+#define PCI_DEVICE_ID_ENE_CB714_SD_2 0x0751
#define PCI_DEVICE_ID_ENE_1211 0x1211
#define PCI_DEVICE_ID_ENE_1225 0x1225
#define PCI_DEVICE_ID_ENE_1410 0x1410
#define PCI_VENDOR_ID_TDI 0x192E
#define PCI_DEVICE_ID_TDI_EHCI 0x0101
+#define PCI_VENDOR_ID_FREESCALE 0x1957
+#define PCI_DEVICE_ID_MPC8548E 0x0012
+#define PCI_DEVICE_ID_MPC8548 0x0013
+#define PCI_DEVICE_ID_MPC8543E 0x0014
+#define PCI_DEVICE_ID_MPC8543 0x0015
+#define PCI_DEVICE_ID_MPC8547E 0x0018
+#define PCI_DEVICE_ID_MPC8545E 0x0019
+#define PCI_DEVICE_ID_MPC8545 0x001a
+#define PCI_DEVICE_ID_MPC8568E 0x0020
+#define PCI_DEVICE_ID_MPC8568 0x0021
+#define PCI_DEVICE_ID_MPC8567E 0x0022
+#define PCI_DEVICE_ID_MPC8567 0x0023
+#define PCI_DEVICE_ID_MPC8544E 0x0030
+#define PCI_DEVICE_ID_MPC8544 0x0031
+#define PCI_DEVICE_ID_MPC8641 0x7010
+#define PCI_DEVICE_ID_MPC8641D 0x7011
+
#define PCI_VENDOR_ID_PASEMI 0x1959
#define PCI_VENDOR_ID_ATTANSIC 0x1969
/*
* Linux Plug and Play Support
* Copyright by Adam Belay <ambx1@neo.rr.com>
- *
*/
#ifndef _LINUX_PNP_H
struct pnp_protocol;
struct pnp_dev;
-
/*
* Resource Management
*/
#define PNP_PORT_FLAG_FIXED (1<<1)
struct pnp_port {
- unsigned short min; /* min base number */
- unsigned short max; /* max base number */
- unsigned char align; /* align boundary */
- unsigned char size; /* size of range */
- unsigned char flags; /* port flags */
- unsigned char pad; /* pad */
- struct pnp_port *next; /* next port */
+ unsigned short min; /* min base number */
+ unsigned short max; /* max base number */
+ unsigned char align; /* align boundary */
+ unsigned char size; /* size of range */
+ unsigned char flags; /* port flags */
+ unsigned char pad; /* pad */
+ struct pnp_port *next; /* next port */
};
#define PNP_IRQ_NR 256
struct pnp_irq {
- DECLARE_BITMAP(map, PNP_IRQ_NR); /* bitmaks for IRQ lines */
- unsigned char flags; /* IRQ flags */
- unsigned char pad; /* pad */
- struct pnp_irq *next; /* next IRQ */
+ DECLARE_BITMAP(map, PNP_IRQ_NR); /* bitmask for IRQ lines */
+ unsigned char flags; /* IRQ flags */
+ unsigned char pad; /* pad */
+ struct pnp_irq *next; /* next IRQ */
};
struct pnp_dma {
- unsigned char map; /* bitmask for DMA channels */
- unsigned char flags; /* DMA flags */
- struct pnp_dma *next; /* next port */
+ unsigned char map; /* bitmask for DMA channels */
+ unsigned char flags; /* DMA flags */
+ struct pnp_dma *next; /* next port */
};
struct pnp_mem {
- unsigned int min; /* min base number */
- unsigned int max; /* max base number */
- unsigned int align; /* align boundary */
- unsigned int size; /* size of range */
- unsigned char flags; /* memory flags */
- unsigned char pad; /* pad */
- struct pnp_mem *next; /* next memory resource */
+ unsigned int min; /* min base number */
+ unsigned int max; /* max base number */
+ unsigned int align; /* align boundary */
+ unsigned int size; /* size of range */
+ unsigned char flags; /* memory flags */
+ unsigned char pad; /* pad */
+ struct pnp_mem *next; /* next memory resource */
};
#define PNP_RES_PRIORITY_PREFERRED 0
struct resource irq_resource[PNP_MAX_IRQ];
};
-
/*
* Device Managemnt
*/
struct list_head protocol_list; /* node in protocol's list of cards */
struct list_head devices; /* devices attached to the card */
- struct pnp_protocol * protocol;
- struct pnp_id * id; /* contains supported EISA IDs*/
+ struct pnp_protocol *protocol;
+ struct pnp_id *id; /* contains supported EISA IDs */
char name[PNP_NAME_LEN]; /* contains a human-readable name */
- unsigned char pnpver; /* Plug & Play version */
- unsigned char productver; /* product version */
- unsigned int serial; /* serial number */
- unsigned char checksum; /* if zero - checksum passed */
+ unsigned char pnpver; /* Plug & Play version */
+ unsigned char productver; /* product version */
+ unsigned int serial; /* serial number */
+ unsigned char checksum; /* if zero - checksum passed */
struct proc_dir_entry *procdir; /* directory entry in /proc/bus/isapnp */
};
(card) = global_to_pnp_card((card)->global_list.next))
struct pnp_card_link {
- struct pnp_card * card;
- struct pnp_card_driver * driver;
- void * driver_data;
+ struct pnp_card *card;
+ struct pnp_card_driver *driver;
+ void *driver_data;
pm_message_t pm_state;
};
-static inline void *pnp_get_card_drvdata (struct pnp_card_link *pcard)
+static inline void *pnp_get_card_drvdata(struct pnp_card_link *pcard)
{
return pcard->driver_data;
}
-static inline void pnp_set_card_drvdata (struct pnp_card_link *pcard, void *data)
+static inline void pnp_set_card_drvdata(struct pnp_card_link *pcard, void *data)
{
pcard->driver_data = data;
}
struct list_head card_list; /* node in card's list of devices */
struct list_head rdev_list; /* node in cards list of requested devices */
- struct pnp_protocol * protocol;
- struct pnp_card * card; /* card the device is attached to, none if NULL */
- struct pnp_driver * driver;
- struct pnp_card_link * card_link;
+ struct pnp_protocol *protocol;
+ struct pnp_card *card; /* card the device is attached to, none if NULL */
+ struct pnp_driver *driver;
+ struct pnp_card_link *card_link;
- struct pnp_id * id; /* supported EISA IDs*/
+ struct pnp_id *id; /* supported EISA IDs */
int active;
int capabilities;
- struct pnp_option * independent;
- struct pnp_option * dependent;
+ struct pnp_option *independent;
+ struct pnp_option *dependent;
struct pnp_resource_table res;
char name[PNP_NAME_LEN]; /* contains a human-readable name */
- unsigned short regs; /* ISAPnP: supported registers */
- int flags; /* used by protocols */
+ unsigned short regs; /* ISAPnP: supported registers */
+ int flags; /* used by protocols */
struct proc_dir_entry *procent; /* device entry in /proc/bus/isapnp */
void *data;
};
(dev) = card_to_pnp_dev((dev)->card_list.next))
#define pnp_dev_name(dev) (dev)->name
-static inline void *pnp_get_drvdata (struct pnp_dev *pdev)
+static inline void *pnp_get_drvdata(struct pnp_dev *pdev)
{
return dev_get_drvdata(&pdev->dev);
}
-static inline void pnp_set_drvdata (struct pnp_dev *pdev, void *data)
+static inline void pnp_set_drvdata(struct pnp_dev *pdev, void *data)
{
dev_set_drvdata(&pdev->dev, data);
}
struct pnp_fixup {
char id[7];
- void (*quirk_function)(struct pnp_dev *dev); /* fixup function */
+ void (*quirk_function) (struct pnp_dev * dev); /* fixup function */
};
/* config parameters */
#define pnp_device_is_pnpbios(dev) 0
#endif
-
/* status */
#define PNP_READY 0x0000
#define PNP_ATTACHED 0x0001
struct pnp_id {
char id[PNP_ID_LEN];
- struct pnp_id * next;
+ struct pnp_id *next;
};
struct pnp_driver {
- char * name;
+ char *name;
const struct pnp_device_id *id_table;
unsigned int flags;
- int (*probe) (struct pnp_dev *dev, const struct pnp_device_id *dev_id);
+ int (*probe) (struct pnp_dev *dev, const struct pnp_device_id *dev_id);
void (*remove) (struct pnp_dev *dev);
- int (*suspend) (struct pnp_dev *dev, pm_message_t state);
- int (*resume) (struct pnp_dev *dev);
+ int (*suspend) (struct pnp_dev *dev, pm_message_t state);
+ int (*resume) (struct pnp_dev *dev);
struct device_driver driver;
};
struct pnp_card_driver {
struct list_head global_list;
- char * name;
+ char *name;
const struct pnp_card_device_id *id_table;
unsigned int flags;
- int (*probe) (struct pnp_card_link *card, const struct pnp_card_device_id *card_id);
+ int (*probe) (struct pnp_card_link *card,
+ const struct pnp_card_device_id *card_id);
void (*remove) (struct pnp_card_link *card);
- int (*suspend) (struct pnp_card_link *card, pm_message_t state);
- int (*resume) (struct pnp_card_link *card);
+ int (*suspend) (struct pnp_card_link *card, pm_message_t state);
+ int (*resume) (struct pnp_card_link *card);
struct pnp_driver link;
};
#define PNP_DRIVER_RES_DO_NOT_CHANGE 0x0001 /* do not change the state of the device */
#define PNP_DRIVER_RES_DISABLE 0x0003 /* ensure the device is disabled */
-
/*
* Protocol Management
*/
struct pnp_protocol {
- struct list_head protocol_list;
- char * name;
+ struct list_head protocol_list;
+ char *name;
/* resource control functions */
- int (*get)(struct pnp_dev *dev, struct pnp_resource_table *res);
- int (*set)(struct pnp_dev *dev, struct pnp_resource_table *res);
- int (*disable)(struct pnp_dev *dev);
+ int (*get) (struct pnp_dev *dev, struct pnp_resource_table *res);
+ int (*set) (struct pnp_dev *dev, struct pnp_resource_table *res);
+ int (*disable) (struct pnp_dev *dev);
+
+ /* protocol specific suspend/resume */
+ int (*suspend) (struct pnp_dev * dev, pm_message_t state);
+ int (*resume) (struct pnp_dev * dev);
/* used by pnp layer only (look but don't touch) */
- unsigned char number; /* protocol number*/
- struct device dev; /* link to driver model */
- struct list_head cards;
- struct list_head devices;
+ unsigned char number; /* protocol number */
+ struct device dev; /* link to driver model */
+ struct list_head cards;
+ struct list_head devices;
};
#define to_pnp_protocol(n) list_entry(n, struct pnp_protocol, protocol_list)
(dev) != protocol_to_pnp_dev(&(protocol)->devices); \
(dev) = protocol_to_pnp_dev((dev)->protocol_list.next))
-
extern struct bus_type pnp_bus_type;
#if defined(CONFIG_PNP)
int pnp_add_card_device(struct pnp_card *card, struct pnp_dev *dev);
void pnp_remove_card_device(struct pnp_dev *dev);
int pnp_add_card_id(struct pnp_id *id, struct pnp_card *card);
-struct pnp_dev * pnp_request_card_device(struct pnp_card_link *clink, const char * id, struct pnp_dev * from);
-void pnp_release_card_device(struct pnp_dev * dev);
-int pnp_register_card_driver(struct pnp_card_driver * drv);
-void pnp_unregister_card_driver(struct pnp_card_driver * drv);
+struct pnp_dev *pnp_request_card_device(struct pnp_card_link *clink,
+ const char *id, struct pnp_dev *from);
+void pnp_release_card_device(struct pnp_dev *dev);
+int pnp_register_card_driver(struct pnp_card_driver *drv);
+void pnp_unregister_card_driver(struct pnp_card_driver *drv);
extern struct list_head pnp_cards;
/* resource management */
-struct pnp_option * pnp_register_independent_option(struct pnp_dev *dev);
-struct pnp_option * pnp_register_dependent_option(struct pnp_dev *dev, int priority);
+struct pnp_option *pnp_register_independent_option(struct pnp_dev *dev);
+struct pnp_option *pnp_register_dependent_option(struct pnp_dev *dev,
+ int priority);
int pnp_register_irq_resource(struct pnp_option *option, struct pnp_irq *data);
int pnp_register_dma_resource(struct pnp_option *option, struct pnp_dma *data);
-int pnp_register_port_resource(struct pnp_option *option, struct pnp_port *data);
+int pnp_register_port_resource(struct pnp_option *option,
+ struct pnp_port *data);
int pnp_register_mem_resource(struct pnp_option *option, struct pnp_mem *data);
void pnp_init_resource_table(struct pnp_resource_table *table);
-int pnp_manual_config_dev(struct pnp_dev *dev, struct pnp_resource_table *res, int mode);
+int pnp_manual_config_dev(struct pnp_dev *dev, struct pnp_resource_table *res,
+ int mode);
int pnp_auto_config_dev(struct pnp_dev *dev);
int pnp_validate_config(struct pnp_dev *dev);
int pnp_start_dev(struct pnp_dev *dev);
int pnp_activate_dev(struct pnp_dev *dev);
int pnp_disable_dev(struct pnp_dev *dev);
void pnp_resource_change(struct resource *resource, resource_size_t start,
- resource_size_t size);
+ resource_size_t size);
/* protocol helpers */
-int pnp_is_active(struct pnp_dev * dev);
-int compare_pnp_id(struct pnp_id * pos, const char * id);
+int pnp_is_active(struct pnp_dev *dev);
+int compare_pnp_id(struct pnp_id *pos, const char *id);
int pnp_add_id(struct pnp_id *id, struct pnp_dev *dev);
int pnp_register_driver(struct pnp_driver *drv);
void pnp_unregister_driver(struct pnp_driver *drv);
static inline int pnp_init_device(struct pnp_dev *dev) { return -ENODEV; }
static inline int pnp_add_device(struct pnp_dev *dev) { return -ENODEV; }
static inline int pnp_device_attach(struct pnp_dev *pnp_dev) { return -ENODEV; }
-static inline void pnp_device_detach(struct pnp_dev *pnp_dev) { ; }
+static inline void pnp_device_detach(struct pnp_dev *pnp_dev) { }
+
#define pnp_platform_devices 0
/* multidevice card support */
static inline int pnp_add_card(struct pnp_card *card) { return -ENODEV; }
-static inline void pnp_remove_card(struct pnp_card *card) { ; }
+static inline void pnp_remove_card(struct pnp_card *card) { }
static inline int pnp_add_card_device(struct pnp_card *card, struct pnp_dev *dev) { return -ENODEV; }
-static inline void pnp_remove_card_device(struct pnp_dev *dev) { ; }
+static inline void pnp_remove_card_device(struct pnp_dev *dev) { }
static inline int pnp_add_card_id(struct pnp_id *id, struct pnp_card *card) { return -ENODEV; }
-static inline struct pnp_dev * pnp_request_card_device(struct pnp_card_link *clink, const char * id, struct pnp_dev * from) { return NULL; }
-static inline void pnp_release_card_device(struct pnp_dev * dev) { ; }
-static inline int pnp_register_card_driver(struct pnp_card_driver * drv) { return -ENODEV; }
-static inline void pnp_unregister_card_driver(struct pnp_card_driver * drv) { ; }
+static inline struct pnp_dev *pnp_request_card_device(struct pnp_card_link *clink, const char *id, struct pnp_dev *from) { return NULL; }
+static inline void pnp_release_card_device(struct pnp_dev *dev) { }
+static inline int pnp_register_card_driver(struct pnp_card_driver *drv) { return -ENODEV; }
+static inline void pnp_unregister_card_driver(struct pnp_card_driver *drv) { }
/* resource management */
-static inline struct pnp_option * pnp_register_independent_option(struct pnp_dev *dev) { return NULL; }
-static inline struct pnp_option * pnp_register_dependent_option(struct pnp_dev *dev, int priority) { return NULL; }
+static inline struct pnp_option *pnp_register_independent_option(struct pnp_dev *dev) { return NULL; }
+static inline struct pnp_option *pnp_register_dependent_option(struct pnp_dev *dev, int priority) { return NULL; }
static inline int pnp_register_irq_resource(struct pnp_option *option, struct pnp_irq *data) { return -ENODEV; }
static inline int pnp_register_dma_resource(struct pnp_option *option, struct pnp_dma *data) { return -ENODEV; }
static inline int pnp_register_port_resource(struct pnp_option *option, struct pnp_port *data) { return -ENODEV; }
static inline int pnp_stop_dev(struct pnp_dev *dev) { return -ENODEV; }
static inline int pnp_activate_dev(struct pnp_dev *dev) { return -ENODEV; }
static inline int pnp_disable_dev(struct pnp_dev *dev) { return -ENODEV; }
-static inline void pnp_resource_change(struct resource *resource,
- resource_size_t start,
- resource_size_t size) { }
+static inline void pnp_resource_change(struct resource *resource, resource_size_t start, resource_size_t size) { }
/* protocol helpers */
-static inline int pnp_is_active(struct pnp_dev * dev) { return 0; }
-static inline int compare_pnp_id(struct pnp_id * pos, const char * id) { return -ENODEV; }
+static inline int pnp_is_active(struct pnp_dev *dev) { return 0; }
+static inline int compare_pnp_id(struct pnp_id *pos, const char *id) { return -ENODEV; }
static inline int pnp_add_id(struct pnp_id *id, struct pnp_dev *dev) { return -ENODEV; }
static inline int pnp_register_driver(struct pnp_driver *drv) { return -ENODEV; }
-static inline void pnp_unregister_driver(struct pnp_driver *drv) { ; }
+static inline void pnp_unregister_driver(struct pnp_driver *drv) { }
#endif /* CONFIG_PNP */
-
#define pnp_err(format, arg...) printk(KERN_ERR "pnp: " format "\n" , ## arg)
#define pnp_info(format, arg...) printk(KERN_INFO "pnp: " format "\n" , ## arg)
#define pnp_warn(format, arg...) printk(KERN_WARNING "pnp: " format "\n" , ## arg)
#pragma pack(1)
struct pnp_dev_node_info {
- __u16 no_nodes;
- __u16 max_node_size;
+ __u16 no_nodes;
+ __u16 max_node_size;
};
struct pnp_docking_station_info {
- __u32 location_id;
- __u32 serial;
- __u16 capabilities;
+ __u32 location_id;
+ __u32 serial;
+ __u16 capabilities;
};
struct pnp_isa_config_struc {
- __u8 revision;
- __u8 no_csns;
- __u16 isa_rd_data_port;
- __u16 reserved;
+ __u8 revision;
+ __u8 no_csns;
+ __u16 isa_rd_data_port;
+ __u16 reserved;
};
struct escd_info_struc {
- __u16 min_escd_write_size;
- __u16 escd_size;
- __u32 nv_storage_base;
+ __u16 min_escd_write_size;
+ __u16 escd_size;
+ __u32 nv_storage_base;
};
struct pnp_bios_node {
- __u16 size;
- __u8 handle;
- __u32 eisa_id;
- __u8 type_code[3];
- __u16 flags;
- __u8 data[0];
+ __u16 size;
+ __u8 handle;
+ __u32 eisa_id;
+ __u8 type_code[3];
+ __u16 flags;
+ __u8 data[0];
};
#pragma pack()
/* non-exported */
extern struct pnp_dev_node_info node_info;
-extern int pnp_bios_dev_node_info (struct pnp_dev_node_info *data);
-extern int pnp_bios_get_dev_node (u8 *nodenum, char config, struct pnp_bios_node *data);
-extern int pnp_bios_set_dev_node (u8 nodenum, char config, struct pnp_bios_node *data);
-extern int pnp_bios_get_stat_res (char *info);
-extern int pnp_bios_isapnp_config (struct pnp_isa_config_struc *data);
-extern int pnp_bios_escd_info (struct escd_info_struc *data);
-extern int pnp_bios_read_escd (char *data, u32 nvram_base);
+extern int pnp_bios_dev_node_info(struct pnp_dev_node_info *data);
+extern int pnp_bios_get_dev_node(u8 *nodenum, char config,
+ struct pnp_bios_node *data);
+extern int pnp_bios_set_dev_node(u8 nodenum, char config,
+ struct pnp_bios_node *data);
+extern int pnp_bios_get_stat_res(char *info);
+extern int pnp_bios_isapnp_config(struct pnp_isa_config_struc *data);
+extern int pnp_bios_escd_info(struct escd_info_struc *data);
+extern int pnp_bios_read_escd(char *data, u32 nvram_base);
extern int pnp_bios_dock_station_info(struct pnp_docking_station_info *data);
-#define needed 0
-#if needed
-extern int pnp_bios_get_event (u16 *message);
-extern int pnp_bios_send_message (u16 message);
-extern int pnp_bios_set_stat_res (char *info);
-extern int pnp_bios_apm_id_table (char *table, u16 *size);
-extern int pnp_bios_write_escd (char *data, u32 nvram_base);
-#endif
#endif /* CONFIG_PNPBIOS */
#include <linux/thread_info.h>
#include <linux/linkage.h>
+#include <linux/list.h>
#ifdef CONFIG_DEBUG_PREEMPT
extern void fastcall add_preempt_count(int val);
#endif
+#ifdef CONFIG_PREEMPT_NOTIFIERS
+
+struct preempt_notifier;
+
+/**
+ * preempt_ops - notifiers called when a task is preempted and rescheduled
+ * @sched_in: we're about to be rescheduled:
+ * notifier: struct preempt_notifier for the task being scheduled
+ * cpu: cpu we're scheduled on
+ * @sched_out: we've just been preempted
+ * notifier: struct preempt_notifier for the task being preempted
+ * next: the task that's kicking us out
+ */
+struct preempt_ops {
+ void (*sched_in)(struct preempt_notifier *notifier, int cpu);
+ void (*sched_out)(struct preempt_notifier *notifier,
+ struct task_struct *next);
+};
+
+/**
+ * preempt_notifier - key for installing preemption notifiers
+ * @link: internal use
+ * @ops: defines the notifier functions to be called
+ *
+ * Usually used in conjunction with container_of().
+ */
+struct preempt_notifier {
+ struct hlist_node link;
+ struct preempt_ops *ops;
+};
+
+void preempt_notifier_register(struct preempt_notifier *notifier);
+void preempt_notifier_unregister(struct preempt_notifier *notifier);
+
+static inline void preempt_notifier_init(struct preempt_notifier *notifier,
+ struct preempt_ops *ops)
+{
+ INIT_HLIST_NODE(¬ifier->link);
+ notifier->ops = ops;
+}
+
+#endif
+
#endif /* __LINUX_PREEMPT_H */
unsigned int safemode_delay;
struct timer_list safemode_timer;
atomic_t writes_pending;
- request_queue_t *queue; /* for plugging ... */
+ struct request_queue *queue; /* for plugging ... */
atomic_t write_behind; /* outstanding async IO */
unsigned int max_write_behind; /* 0 = sync */
int level;
struct list_head list;
struct module *owner;
- int (*make_request)(request_queue_t *q, struct bio *bio);
+ int (*make_request)(struct request_queue *q, struct bio *bio);
int (*run)(mddev_t *mddev);
int (*stop)(mddev_t *mddev);
void (*status)(struct seq_file *seq, mddev_t *mddev);
#define SCHED_LOAD_SHIFT 10
#define SCHED_LOAD_SCALE (1L << SCHED_LOAD_SHIFT)
-#define SCHED_LOAD_SCALE_FUZZ (SCHED_LOAD_SCALE >> 5)
+#define SCHED_LOAD_SCALE_FUZZ (SCHED_LOAD_SCALE >> 1)
#ifdef CONFIG_SMP
#define SD_LOAD_BALANCE 1 /* Do load balancing on this domain. */
#endif /* CONFIG_SMP */
+/*
+ * A runqueue laden with a single nice 0 task scores a weighted_cpuload of
+ * SCHED_LOAD_SCALE. This function returns 1 if any cpu is laden with a
+ * task of nice 0 or enough lower priority tasks to bring up the
+ * weighted_cpuload
+ */
+static inline int above_background_load(void)
+{
+ unsigned long cpu;
+
+ for_each_online_cpu(cpu) {
+ if (weighted_cpuload(cpu) >= SCHED_LOAD_SCALE)
+ return 1;
+ }
+ return 0;
+}
struct io_context; /* See blkdev.h */
struct cpuset;
struct sched_class *sched_class;
struct sched_entity se;
+#ifdef CONFIG_PREEMPT_NOTIFIERS
+ /* list of struct preempt_notifier: */
+ struct hlist_head preempt_notifiers;
+#endif
+
unsigned short ioprio;
#ifdef CONFIG_BLK_DEV_IO_TRACE
unsigned int btrace_seq;
struct plat_serial8250_port {
unsigned long iobase; /* io base address */
void __iomem *membase; /* ioremap cookie or NULL */
- unsigned long mapbase; /* resource base */
+ resource_size_t mapbase; /* resource base */
unsigned int irq; /* interrupt number */
unsigned int uartclk; /* UART clock rate */
unsigned char regshift; /* register shift */
const struct uart_ops *ops;
unsigned int custom_divisor;
unsigned int line; /* port index */
- unsigned long mapbase; /* for ioremap */
+ resource_size_t mapbase; /* for ioremap */
struct device *dev; /* parent device */
unsigned char hub6; /* this should be in the 8250 driver */
unsigned char unused[3];
static inline void register_nosave_region(unsigned long b, unsigned long e)
{
}
+static inline void register_nosave_region_late(unsigned long b, unsigned long e)
+{
+}
#endif
#endif /* _LINUX_SWSUSP_H */
extern int no_sync_cmos_clock __read_mostly;
void timekeeping_init(void);
-static inline unsigned long get_seconds(void)
-{
- return xtime.tv_sec;
-}
-
+unsigned long get_seconds(void);
struct timespec current_kernel_time(void);
#define CURRENT_TIME (current_kernel_time())
-#define CURRENT_TIME_SEC ((struct timespec) { xtime.tv_sec, 0 })
+#define CURRENT_TIME_SEC ((struct timespec) { get_seconds(), 0 })
extern void do_gettimeofday(struct timeval *tv);
extern int do_settimeofday(struct timespec *tv);
union nf_conntrack_man_proto
{
/* Add other protocols here. */
- u_int16_t all;
+ __be16 all;
struct {
__be16 port;
union nf_conntrack_address u3;
union {
/* Add other protocols here. */
- u_int16_t all;
+ __be16 all;
struct {
__be16 port;
static void sd_rescan(struct device *);
static int sd_init_command(struct scsi_cmnd *);
static int sd_issue_flush(struct device *, sector_t *);
-static void sd_prepare_flush(request_queue_t *, struct request *);
+static void sd_prepare_flush(struct request_queue *, struct request *);
static void sd_read_capacity(struct scsi_disk *sdkp, unsigned char *buffer);
static void scsi_disk_release(struct class_device *cdev);
static void sd_print_sense_hdr(struct scsi_disk *, struct scsi_sense_hdr *);
#include <linux/pfn.h>
#include <asm/uaccess.h>
+#include <asm/pgtable.h>
#include <xen/features.h>
static __initdata int dry_run;
-static inline void eat(unsigned n)
+static inline void __init eat(unsigned n)
{
victim += n;
this_header += n;
Say Y here if you are building a kernel for a desktop system.
Say N if you are unsure.
+config PREEMPT_NOTIFIERS
+ bool
+
}
#endif
do_div(elapsed, AHZ);
- ac.ac_btime = xtime.tv_sec - elapsed;
+ ac.ac_btime = get_seconds() - elapsed;
/* we really need to bite the bullet and change layout */
ac.ac_uid = current->uid;
ac.ac_gid = current->gid;
do {
seq = read_seqbegin(&xtime_lock);
-#ifdef CONFIG_NO_HZ
- getnstimeofday(&xts);
-#else
- xts = xtime;
-#endif
+ xts = current_kernel_time();
tom = wall_to_monotonic;
} while (read_seqretry(&xtime_lock, seq));
/**
* call_usermodehelper_setup - prepare to call a usermode helper
- * @path - path to usermode executable
- * @argv - arg vector for process
- * @envp - environment for process
+ * @path: path to usermode executable
+ * @argv: arg vector for process
+ * @envp: environment for process
*
- * Returns either NULL on allocation failure, or a subprocess_info
+ * Returns either %NULL on allocation failure, or a subprocess_info
* structure. This should be passed to call_usermodehelper_exec to
* exec the process and free the structure.
*/
* sleep state after all
*/
error = hibernation_ops->prepare();
+ sysdev_shutdown();
if (!error)
error = hibernation_ops->enter();
} else {
#include <linux/percpu.h>
#include <linux/kthread.h>
#include <linux/seq_file.h>
+#include <linux/sysctl.h>
#include <linux/syscalls.h>
#include <linux/times.h>
#include <linux/tsacct_kern.h>
unsigned int clock_warps, clock_overflows;
unsigned int clock_unstable_events;
- struct sched_class *load_balance_class;
-
atomic_t nr_iowait;
#ifdef CONFIG_SMP
*/
unsigned long long cpu_clock(int cpu)
{
- struct rq *rq = cpu_rq(cpu);
unsigned long long now;
unsigned long flags;
- spin_lock_irqsave(&rq->lock, flags);
- now = rq_clock(rq);
- spin_unlock_irqrestore(&rq->lock, flags);
+ local_irq_save(flags);
+ now = rq_clock(cpu_rq(cpu));
+ local_irq_restore(flags);
return now;
}
INIT_LIST_HEAD(&p->run_list);
p->se.on_rq = 0;
+#ifdef CONFIG_PREEMPT_NOTIFIERS
+ INIT_HLIST_HEAD(&p->preempt_notifiers);
+#endif
+
/*
* We mark the process as running here, but have not actually
* inserted it onto the runqueue yet. This guarantees that
task_rq_unlock(rq, &flags);
}
+#ifdef CONFIG_PREEMPT_NOTIFIERS
+
+/**
+ * preempt_notifier_register - tell me when current is being being preempted
+ * and rescheduled
+ */
+void preempt_notifier_register(struct preempt_notifier *notifier)
+{
+ hlist_add_head(¬ifier->link, ¤t->preempt_notifiers);
+}
+EXPORT_SYMBOL_GPL(preempt_notifier_register);
+
+/**
+ * preempt_notifier_unregister - no longer interested in preemption notifications
+ *
+ * This is safe to call from within a preemption notifier.
+ */
+void preempt_notifier_unregister(struct preempt_notifier *notifier)
+{
+ hlist_del(¬ifier->link);
+}
+EXPORT_SYMBOL_GPL(preempt_notifier_unregister);
+
+static void fire_sched_in_preempt_notifiers(struct task_struct *curr)
+{
+ struct preempt_notifier *notifier;
+ struct hlist_node *node;
+
+ hlist_for_each_entry(notifier, node, &curr->preempt_notifiers, link)
+ notifier->ops->sched_in(notifier, raw_smp_processor_id());
+}
+
+static void
+fire_sched_out_preempt_notifiers(struct task_struct *curr,
+ struct task_struct *next)
+{
+ struct preempt_notifier *notifier;
+ struct hlist_node *node;
+
+ hlist_for_each_entry(notifier, node, &curr->preempt_notifiers, link)
+ notifier->ops->sched_out(notifier, next);
+}
+
+#else
+
+static void fire_sched_in_preempt_notifiers(struct task_struct *curr)
+{
+}
+
+static void
+fire_sched_out_preempt_notifiers(struct task_struct *curr,
+ struct task_struct *next)
+{
+}
+
+#endif
+
/**
* prepare_task_switch - prepare to switch tasks
* @rq: the runqueue preparing to switch
* prepare_task_switch sets up locking and calls architecture specific
* hooks.
*/
-static inline void prepare_task_switch(struct rq *rq, struct task_struct *next)
+static inline void
+prepare_task_switch(struct rq *rq, struct task_struct *prev,
+ struct task_struct *next)
{
+ fire_sched_out_preempt_notifiers(prev, next);
prepare_lock_switch(rq, next);
prepare_arch_switch(next);
}
prev_state = prev->state;
finish_arch_switch(prev);
finish_lock_switch(rq, prev);
+ fire_sched_in_preempt_notifiers(current);
if (mm)
mmdrop(mm);
if (unlikely(prev_state == TASK_DEAD)) {
{
struct mm_struct *mm, *oldmm;
- prepare_task_switch(rq, next);
+ prepare_task_switch(rq, prev, next);
mm = next->mm;
oldmm = prev->active_mm;
/*
if (!next)
break;
migrate_dead(dead_cpu, next);
+
}
}
#endif /* CONFIG_HOTPLUG_CPU */
+#if defined(CONFIG_SCHED_DEBUG) && defined(CONFIG_SYSCTL)
+
+static struct ctl_table sd_ctl_dir[] = {
+ {CTL_UNNUMBERED, "sched_domain", NULL, 0, 0755, NULL, },
+ {0,},
+};
+
+static struct ctl_table sd_ctl_root[] = {
+ {CTL_UNNUMBERED, "kernel", NULL, 0, 0755, sd_ctl_dir, },
+ {0,},
+};
+
+static struct ctl_table *sd_alloc_ctl_entry(int n)
+{
+ struct ctl_table *entry =
+ kmalloc(n * sizeof(struct ctl_table), GFP_KERNEL);
+
+ BUG_ON(!entry);
+ memset(entry, 0, n * sizeof(struct ctl_table));
+
+ return entry;
+}
+
+static void
+set_table_entry(struct ctl_table *entry, int ctl_name,
+ const char *procname, void *data, int maxlen,
+ mode_t mode, proc_handler *proc_handler)
+{
+ entry->ctl_name = ctl_name;
+ entry->procname = procname;
+ entry->data = data;
+ entry->maxlen = maxlen;
+ entry->mode = mode;
+ entry->proc_handler = proc_handler;
+}
+
+static struct ctl_table *
+sd_alloc_ctl_domain_table(struct sched_domain *sd)
+{
+ struct ctl_table *table = sd_alloc_ctl_entry(14);
+
+ set_table_entry(&table[0], 1, "min_interval", &sd->min_interval,
+ sizeof(long), 0644, proc_doulongvec_minmax);
+ set_table_entry(&table[1], 2, "max_interval", &sd->max_interval,
+ sizeof(long), 0644, proc_doulongvec_minmax);
+ set_table_entry(&table[2], 3, "busy_idx", &sd->busy_idx,
+ sizeof(int), 0644, proc_dointvec_minmax);
+ set_table_entry(&table[3], 4, "idle_idx", &sd->idle_idx,
+ sizeof(int), 0644, proc_dointvec_minmax);
+ set_table_entry(&table[4], 5, "newidle_idx", &sd->newidle_idx,
+ sizeof(int), 0644, proc_dointvec_minmax);
+ set_table_entry(&table[5], 6, "wake_idx", &sd->wake_idx,
+ sizeof(int), 0644, proc_dointvec_minmax);
+ set_table_entry(&table[6], 7, "forkexec_idx", &sd->forkexec_idx,
+ sizeof(int), 0644, proc_dointvec_minmax);
+ set_table_entry(&table[7], 8, "busy_factor", &sd->busy_factor,
+ sizeof(int), 0644, proc_dointvec_minmax);
+ set_table_entry(&table[8], 9, "imbalance_pct", &sd->imbalance_pct,
+ sizeof(int), 0644, proc_dointvec_minmax);
+ set_table_entry(&table[9], 10, "cache_hot_time", &sd->cache_hot_time,
+ sizeof(long long), 0644, proc_doulongvec_minmax);
+ set_table_entry(&table[10], 11, "cache_nice_tries",
+ &sd->cache_nice_tries,
+ sizeof(int), 0644, proc_dointvec_minmax);
+ set_table_entry(&table[12], 13, "flags", &sd->flags,
+ sizeof(int), 0644, proc_dointvec_minmax);
+
+ return table;
+}
+
+static ctl_table *sd_alloc_ctl_cpu_table(int cpu)
+{
+ struct ctl_table *entry, *table;
+ struct sched_domain *sd;
+ int domain_num = 0, i;
+ char buf[32];
+
+ for_each_domain(cpu, sd)
+ domain_num++;
+ entry = table = sd_alloc_ctl_entry(domain_num + 1);
+
+ i = 0;
+ for_each_domain(cpu, sd) {
+ snprintf(buf, 32, "domain%d", i);
+ entry->ctl_name = i + 1;
+ entry->procname = kstrdup(buf, GFP_KERNEL);
+ entry->mode = 0755;
+ entry->child = sd_alloc_ctl_domain_table(sd);
+ entry++;
+ i++;
+ }
+ return table;
+}
+
+static struct ctl_table_header *sd_sysctl_header;
+static void init_sched_domain_sysctl(void)
+{
+ int i, cpu_num = num_online_cpus();
+ struct ctl_table *entry = sd_alloc_ctl_entry(cpu_num + 1);
+ char buf[32];
+
+ sd_ctl_dir[0].child = entry;
+
+ for (i = 0; i < cpu_num; i++, entry++) {
+ snprintf(buf, 32, "cpu%d", i);
+ entry->ctl_name = i + 1;
+ entry->procname = kstrdup(buf, GFP_KERNEL);
+ entry->mode = 0755;
+ entry->child = sd_alloc_ctl_cpu_table(i);
+ }
+ sd_sysctl_header = register_sysctl_table(sd_ctl_root);
+}
+#else
+static void init_sched_domain_sysctl(void)
+{
+}
+#endif
+
/*
* migration_call - callback that gets triggered when a CPU is added.
* Here we can start up the necessary migration thread for the new CPU.
/* XXX: Theoretical race here - CPU may be hotplugged now */
hotcpu_notifier(update_sched_domains, 0);
+ init_sched_domain_sysctl();
+
/* Move init over to a non-isolated CPU */
if (set_cpus_allowed(current, non_isolated_cpus) < 0)
BUG();
set_load_weight(&init_task);
+#ifdef CONFIG_PREEMPT_NOTIFIERS
+ INIT_HLIST_HEAD(&init_task.preempt_notifiers);
+#endif
+
#ifdef CONFIG_SMP
nr_cpu_ids = highest_cpu + 1;
open_softirq(SCHED_SOFTIRQ, run_rebalance_domains, NULL);
return 0;
}
-void sysrq_sched_debug_show(void)
+static void sysrq_sched_debug_show(void)
{
sched_debug_show(NULL, NULL);
}
blocking_notifier_call_chain(&reboot_notifier_list, SYS_RESTART, cmd);
system_state = SYSTEM_RESTART;
device_shutdown();
+ sysdev_shutdown();
}
/**
void kernel_halt(void)
{
kernel_shutdown_prepare(SYSTEM_HALT);
+ sysdev_shutdown();
printk(KERN_EMERG "System halted.\n");
machine_halt();
}
kernel_shutdown_prepare(SYSTEM_POWER_OFF);
if (pm_power_off_prepare)
pm_power_off_prepare();
+ sysdev_shutdown();
printk(KERN_EMERG "Power down.\n");
machine_power_off();
}
.proc_handler = &proc_dointvec,
},
#endif
-#ifdef CONFIG_ACPI_SLEEP
+#if defined(CONFIG_ACPI) && defined(CONFIG_X86)
{
.ctl_name = KERN_ACPI_VIDEO_FLAGS,
.procname = "acpi_video_flags",
return copy_to_user(txc_p, &txc, sizeof(struct timex)) ? -EFAULT : ret;
}
-inline struct timespec current_kernel_time(void)
-{
- struct timespec now;
- unsigned long seq;
-
- do {
- seq = read_seqbegin(&xtime_lock);
-
- now = xtime;
- } while (read_seqretry(&xtime_lock, seq));
-
- return now;
-}
-
-EXPORT_SYMBOL(current_kernel_time);
-
/**
* current_fs_time - Return FS time
* @sb: Superblock.
struct timespec xtime __attribute__ ((aligned (16)));
struct timespec wall_to_monotonic __attribute__ ((aligned (16)));
static unsigned long total_sleep_time; /* seconds */
-
EXPORT_SYMBOL(xtime);
+#ifdef CONFIG_NO_HZ
+static struct timespec xtime_cache __attribute__ ((aligned (16)));
+static inline void update_xtime_cache(u64 nsec)
+{
+ xtime_cache = xtime;
+ timespec_add_ns(&xtime_cache, nsec);
+}
+#else
+#define xtime_cache xtime
+/* We do *not* want to evaluate the argument for this case */
+#define update_xtime_cache(n) do { } while (0)
+#endif
+
static struct clocksource *clock; /* pointer to current clocksource */
xtime.tv_nsec = (s64)clock->xtime_nsec >> clock->shift;
clock->xtime_nsec -= (s64)xtime.tv_nsec << clock->shift;
+ update_xtime_cache(cyc2ns(clock, offset));
+
/* check to see if there is a new clocksource to use */
change_clocksource();
update_vsyscall(&xtime, clock);
{
ts->tv_sec += total_sleep_time;
}
+
+unsigned long get_seconds(void)
+{
+ return xtime_cache.tv_sec;
+}
+EXPORT_SYMBOL(get_seconds);
+
+
+struct timespec current_kernel_time(void)
+{
+ struct timespec now;
+ unsigned long seq;
+
+ do {
+ seq = read_seqbegin(&xtime_lock);
+
+ now = xtime_cache;
+ } while (read_seqretry(&xtime_lock, seq));
+
+ return now;
+}
+EXPORT_SYMBOL(current_kernel_time);
ac_etime = timespec_to_ns(&ts);
do_div(ac_etime, NSEC_PER_USEC);
stats->ac_etime = ac_etime;
- stats->ac_btime = xtime.tv_sec - ts.tv_sec;
+ stats->ac_btime = get_seconds() - ts.tv_sec;
if (thread_group_leader(tsk)) {
stats->ac_exitcode = tsk->exit_code;
if (tsk->flags & PF_FORKNOEXEC)
*(unsigned long *)data = val;
}
+#ifdef CONFIG_FAULT_INJECTION_STACKTRACE_FILTER
static void debugfs_ul_set_MAX_STACK_TRACE_DEPTH(void *data, u64 val)
{
*(unsigned long *)data =
val < MAX_STACK_TRACE_DEPTH ?
val : MAX_STACK_TRACE_DEPTH;
}
+#endif /* CONFIG_FAULT_INJECTION_STACKTRACE_FILTER */
static u64 debugfs_ul_get(void *data)
{
return debugfs_create_file(name, mode, parent, value, &fops_ul);
}
+#ifdef CONFIG_FAULT_INJECTION_STACKTRACE_FILTER
DEFINE_SIMPLE_ATTRIBUTE(fops_ul_MAX_STACK_TRACE_DEPTH, debugfs_ul_get,
debugfs_ul_set_MAX_STACK_TRACE_DEPTH, "%llu\n");
return debugfs_create_file(name, mode, parent, value,
&fops_ul_MAX_STACK_TRACE_DEPTH);
}
+#endif /* CONFIG_FAULT_INJECTION_STACKTRACE_FILTER */
static void debugfs_atomic_t_set(void *data, u64 val)
{
return 0;
}
-static void __blk_queue_bounce(request_queue_t *q, struct bio **bio_orig,
+static void __blk_queue_bounce(struct request_queue *q, struct bio **bio_orig,
mempool_t *pool)
{
struct page *page;
*bio_orig = bio;
}
-void blk_queue_bounce(request_queue_t *q, struct bio **bio_orig)
+void blk_queue_bounce(struct request_queue *q, struct bio **bio_orig)
{
mempool_t *pool;
list_del(&page->lru);
free_huge_pages--;
free_huge_pages_node[nid]--;
+ break;
}
}
return page;
struct zone *zone = page_zone(page);
spin_lock_irq(&zone->lru_lock);
- if (PageLRU(page)) {
+ if (PageLRU(page) && get_page_unless_zero(page)) {
ret = 0;
- get_page(page);
ClearPageLRU(page);
if (PageActive(page))
del_page_from_active_list(zone, page);
goto unlock;
wait_on_page_writeback(page);
}
-
/*
- * Establish migration ptes or remove ptes
+ * By try_to_unmap(), page->mapcount goes down to 0 here. In this case,
+ * we cannot notice that anon_vma is freed while we migrates a page.
+ * This rcu_read_lock() delays freeing anon_vma pointer until the end
+ * of migration. File cache pages are no problem because of page_lock()
+ */
+ rcu_read_lock();
+ /*
+ * This is a corner case handling.
+ * When a new swap-cache is read into, it is linked to LRU
+ * and treated as swapcache but has no rmap yet.
+ * Calling try_to_unmap() against a page->mapping==NULL page is
+ * BUG. So handle it here.
*/
+ if (!page->mapping)
+ goto rcu_unlock;
+ /* Establish migration ptes or remove ptes */
try_to_unmap(page, 1);
+
if (!page_mapped(page))
rc = move_to_new_page(newpage, page);
if (rc)
remove_migration_ptes(page, page);
+rcu_unlock:
+ rcu_read_unlock();
unlock:
+
unlock_page(page);
if (rc != -EAGAIN) {
if (i == -1)
return 0;
+ prev_end_pfn = min(early_node_map[i].start_pfn, range_end_pfn);
+
/* Account for ranges before physical memory on this node */
if (early_node_map[i].start_pfn > range_start_pfn)
- hole_pages = early_node_map[i].start_pfn - range_start_pfn;
-
- prev_end_pfn = early_node_map[i].start_pfn;
+ hole_pages = prev_end_pfn - range_start_pfn;
/* Find all holes for the zone within the node */
for (; i != -1; i = next_active_region_index_in_nid(i, nid)) {
* 'nodeid'.
*/
if (!objp)
- objp = kmem_getpages(cachep, flags, nodeid);
+ objp = kmem_getpages(cachep, local_flags, nodeid);
if (!objp)
goto failed;
err = -EINVAL;
break;
case GET_VLAN_REALDEV_NAME_CMD:
+ err = 0;
vlan_dev_get_realdev_name(dev, args.u.device2);
if (copy_to_user(arg, &args,
sizeof(struct vlan_ioctl_args))) {
break;
case GET_VLAN_VID_CMD:
+ err = 0;
vlan_dev_get_vid(dev, &vid);
args.u.VID = vid;
if (copy_to_user(arg, &args,
*/
static inline int is_link_local(const unsigned char *dest)
{
- const u16 *a = (const u16 *) dest;
- static const u16 *const b = (const u16 *const ) br_group_address;
- static const u16 m = __constant_cpu_to_be16(0xfff0);
+ __be16 *a = (__be16 *)dest;
+ static const __be16 *b = (const __be16 *)br_group_address;
+ static const __be16 m = __constant_cpu_to_be16(0xfff0);
return ((a[0] ^ b[0]) | (a[1] ^ b[1]) | ((a[2] ^ b[2]) & m)) == 0;
}
*
*/
-#include <linux/in.h>
#include <linux/netfilter_bridge/ebtables.h>
#include <linux/netfilter_bridge/ebt_log.h>
#include <linux/netfilter.h>
ret = ebt_register_watcher(&log);
if (ret < 0)
return ret;
- ret = nf_log_register(PF_BRIDGE, &ebt_log_logger);
- if (ret < 0 && ret != -EEXIST)
- ebt_unregister_watcher(&log);
- return ret;
+ nf_log_register(PF_BRIDGE, &ebt_log_logger);
+ return 0;
}
static void __exit ebt_log_fini(void)
#include <linux/timer.h>
#include <linux/netlink.h>
#include <linux/netdevice.h>
-#include <linux/module.h>
#include <linux/netfilter_bridge/ebtables.h>
#include <linux/netfilter_bridge/ebt_ulog.h>
#include <net/sock.h>
else if ((ret = ebt_register_watcher(&ulog)))
sock_release(ebtulognl->sk_socket);
- if (nf_log_register(PF_BRIDGE, &ebt_ulog_logger) < 0) {
- printk(KERN_WARNING "ebt_ulog: not logging via ulog "
- "since somebody else already registered for PF_BRIDGE\n");
- /* we cannot make module load fail here, since otherwise
- * ebtables userspace would abort */
- }
+ if (ret == 0)
+ nf_log_register(PF_BRIDGE, &ebt_ulog_logger);
return ret;
}
ret = xt_register_target(&ipt_log_reg);
if (ret < 0)
return ret;
- ret = nf_log_register(PF_INET, &ipt_log_logger);
- if (ret < 0 && ret != -EEXIST)
- xt_unregister_target(&ipt_log_reg);
- return ret;
+ nf_log_register(PF_INET, &ipt_log_logger);
+ return 0;
}
static void __exit ipt_log_fini(void)
hash_by_src(const struct nf_conntrack_tuple *tuple)
{
/* Original src, to ensure we map it consistently if poss. */
- return jhash_3words((__force u32)tuple->src.u3.ip, tuple->src.u.all,
+ return jhash_3words((__force u32)tuple->src.u3.ip,
+ (__force u32)tuple->src.u.all,
tuple->dst.protonum, 0) % nf_nat_htable_size;
}
= (HOOK2MANIP(hooknum) == IP_NAT_MANIP_SRC
? ct->tuplehash[IP_CT_DIR_REPLY].tuple.dst.u3.ip
: ct->tuplehash[IP_CT_DIR_REPLY].tuple.src.u3.ip);
- u_int16_t all
+ __be16 all
= (HOOK2MANIP(hooknum) == IP_NAT_MANIP_SRC
? ct->tuplehash[IP_CT_DIR_REPLY].tuple.dst.u.all
: ct->tuplehash[IP_CT_DIR_REPLY].tuple.src.u.all);
static int
ip6_tnl_err(struct sk_buff *skb, __u8 ipproto, struct inet6_skb_parm *opt,
- int *type, int *code, int *msg, __be32 *info, int offset)
+ int *type, int *code, int *msg, __u32 *info, int offset)
{
struct ipv6hdr *ipv6h = (struct ipv6hdr *) skb->data;
struct ip6_tnl *t;
if ((*code) == ICMPV6_HDR_FIELD)
teli = parse_tlv_tnl_enc_lim(skb, skb->data);
- if (teli && teli == ntohl(*info) - 2) {
+ if (teli && teli == *info - 2) {
tel = (struct ipv6_tlv_tnl_enc_lim *) &skb->data[teli];
if (tel->encap_limit == 0) {
if (net_ratelimit())
}
break;
case ICMPV6_PKT_TOOBIG:
- mtu = ntohl(*info) - offset;
+ mtu = *info - offset;
if (mtu < IPV6_MIN_MTU)
mtu = IPV6_MIN_MTU;
t->dev->mtu = mtu;
static int
ip4ip6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
- int type, int code, int offset, __u32 info)
+ int type, int code, int offset, __be32 info)
{
int rel_msg = 0;
int rel_type = type;
int rel_code = code;
- __u32 rel_info = info;
+ __u32 rel_info = ntohl(info);
int err;
struct sk_buff *skb2;
struct iphdr *eiph;
goto out;
skb2->dst->ops->update_pmtu(skb2->dst, rel_info);
- rel_info = htonl(rel_info);
}
- icmp_send(skb2, rel_type, rel_code, rel_info);
+ icmp_send(skb2, rel_type, rel_code, htonl(rel_info));
out:
kfree_skb(skb2);
static int
ip6ip6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
- int type, int code, int offset, __u32 info)
+ int type, int code, int offset, __be32 info)
{
int rel_msg = 0;
int rel_type = type;
int rel_code = code;
- __u32 rel_info = info;
+ __u32 rel_info = ntohl(info);
int err;
err = ip6_tnl_err(skb, IPPROTO_IPV6, opt, &rel_type, &rel_code,
ret = xt_register_target(&ip6t_log_reg);
if (ret < 0)
return ret;
- ret = nf_log_register(PF_INET6, &ip6t_logger);
- if (ret < 0 && ret != -EEXIST)
- xt_unregister_target(&ip6t_log_reg);
- return ret;
+ nf_log_register(PF_INET6, &ip6t_logger);
+ return 0;
}
static void __exit ip6t_log_fini(void)
if (tp->md5sig_info->entries6 == 0) {
kfree(tp->md5sig_info->keys6);
tp->md5sig_info->keys6 = NULL;
+ tp->md5sig_info->alloced6 = 0;
tcp_free_md5sig_pool();
sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
sel.sport = ((struct sockaddr_in *)(sa + 1))->sin_port;
if (sel.sport)
- sel.sport_mask = ~0;
+ sel.sport_mask = htons(0xffff);
/* set destination address info of selector */
sa = ext_hdrs[SADB_EXT_ADDRESS_DST - 1],
sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
sel.dport = ((struct sockaddr_in *)(sa + 1))->sin_port;
if (sel.dport)
- sel.dport_mask = ~0;
+ sel.dport_mask = htons(0xffff);
rq = (struct sadb_x_ipsecrequest *)(pol + 1);
a = jhash2(tuple->src.u3.all, ARRAY_SIZE(tuple->src.u3.all),
(tuple->src.l3num << 16) | tuple->dst.protonum);
b = jhash2(tuple->dst.u3.all, ARRAY_SIZE(tuple->dst.u3.all),
- (tuple->src.u.all << 16) | tuple->dst.u.all);
+ ((__force __u16)tuple->src.u.all << 16) |
+ (__force __u16)tuple->dst.u.all);
return jhash_2words(a, b, rnd) % size;
}
return jhash2(tuple->dst.u3.all, ARRAY_SIZE(tuple->dst.u3.all),
(((tuple->dst.protonum ^ tuple->src.l3num) << 16) |
- tuple->dst.u.all) ^ nf_ct_expect_hash_rnd) %
+ (__force __u16)tuple->dst.u.all) ^ nf_ct_expect_hash_rnd) %
nf_ct_expect_hsize;
}
}
if (src) {
- exp->tuple.src.u.all = (__force u16)*src;
- exp->mask.src.u.all = 0xFFFF;
+ exp->tuple.src.u.all = *src;
+ exp->mask.src.u.all = htons(0xFFFF);
} else {
exp->tuple.src.u.all = 0;
exp->mask.src.u.all = 0;
memset((void *)&exp->tuple.dst.u3 + len, 0x00,
sizeof(exp->tuple.dst.u3) - len);
- exp->tuple.dst.u.all = (__force u16)*dst;
+ exp->tuple.dst.u.all = *dst;
}
EXPORT_SYMBOL_GPL(nf_ct_expect_init);
static unsigned int helper_hash(const struct nf_conntrack_tuple *tuple)
{
return (((tuple->src.l3num << 8) | tuple->dst.protonum) ^
- tuple->src.u.all) % nf_ct_helper_hsize;
+ (__force __u16)tuple->src.u.all) % nf_ct_helper_hsize;
}
struct nf_conntrack_helper *
#include <linux/types.h>
#include <linux/timer.h>
-#include <linux/netfilter.h>
#include <linux/module.h>
#include <linux/in.h>
#include <linux/tcp.h>
#include <linux/types.h>
#include <linux/timer.h>
#include <linux/module.h>
-#include <linux/netfilter.h>
#include <linux/udp.h>
#include <linux/seq_file.h>
#include <linux/skbuff.h>
#include <linux/types.h>
#include <linux/timer.h>
#include <linux/module.h>
-#include <linux/netfilter.h>
#include <linux/udp.h>
#include <linux/seq_file.h>
#include <linux/skbuff.h>
static u_int32_t connlimit_rnd;
static bool connlimit_rnd_inited;
-static inline unsigned int connlimit_iphash(u_int32_t addr)
+static inline unsigned int connlimit_iphash(__be32 addr)
{
if (unlikely(!connlimit_rnd_inited)) {
get_random_bytes(&connlimit_rnd, sizeof(connlimit_rnd));
connlimit_rnd_inited = true;
}
- return jhash_1word(addr, connlimit_rnd) & 0xFF;
+ return jhash_1word((__force __u32)addr, connlimit_rnd) & 0xFF;
}
static inline unsigned int
for (i = 0; i < ARRAY_SIZE(addr->ip6); ++i)
res.ip6[i] = addr->ip6[i] & mask->ip6[i];
- return jhash2(res.ip6, ARRAY_SIZE(res.ip6), connlimit_rnd) & 0xFF;
+ return jhash2((u32 *)res.ip6, ARRAY_SIZE(res.ip6), connlimit_rnd) & 0xFF;
}
static inline bool already_closed(const struct nf_conn *conn)
#include <linux/netfilter_bridge.h>
#include <linux/netfilter/xt_physdev.h>
#include <linux/netfilter/x_tables.h>
-#include <linux/netfilter_bridge.h>
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Bart De Schuymer <bdschuym@pandora.be>");
unsigned int nnums;
unsigned int nvals;
unsigned int i;
+ __be32 n;
u_int32_t pos;
u_int32_t val;
u_int32_t at;
if (skb->len < 4 || pos > skb->len - 4);
return false;
- ret = skb_copy_bits(skb, pos, &val, sizeof(val));
+ ret = skb_copy_bits(skb, pos, &n, sizeof(n));
BUG_ON(ret < 0);
- val = ntohl(val);
+ val = ntohl(n);
nnums = ct->nnums;
/* Inner loop runs over "&", "<<", ">>" and "@" operands */
pos > skb->len - at - 4)
return false;
- ret = skb_copy_bits(skb, at + pos, &val,
- sizeof(val));
+ ret = skb_copy_bits(skb, at + pos, &n,
+ sizeof(n));
BUG_ON(ret < 0);
- val = ntohl(val);
+ val = ntohl(n);
break;
}
}
}
err = netlink_change_ngroups(genl_sock,
- sizeof(unsigned long) * NETLINK_GENERIC);
+ mc_groups_longs * BITS_PER_LONG);
if (err)
goto out;
genl_ctrl_event(CTRL_CMD_NEWMCAST_GRP, grp);
out:
genl_unlock();
- return 0;
+ return err;
}
EXPORT_SYMBOL(genl_register_mc_group);
+static void __genl_unregister_mc_group(struct genl_family *family,
+ struct genl_multicast_group *grp)
+{
+ BUG_ON(grp->family != family);
+ netlink_clear_multicast_users(genl_sock, grp->id);
+ clear_bit(grp->id, mc_groups);
+ list_del(&grp->list);
+ genl_ctrl_event(CTRL_CMD_DELMCAST_GRP, grp);
+ grp->id = 0;
+ grp->family = NULL;
+}
+
/**
* genl_unregister_mc_group - unregister a multicast group
*
void genl_unregister_mc_group(struct genl_family *family,
struct genl_multicast_group *grp)
{
- BUG_ON(grp->family != family);
genl_lock();
- netlink_clear_multicast_users(genl_sock, grp->id);
- clear_bit(grp->id, mc_groups);
- list_del(&grp->list);
- genl_ctrl_event(CTRL_CMD_DELMCAST_GRP, grp);
- grp->id = 0;
- grp->family = NULL;
+ __genl_unregister_mc_group(family, grp);
genl_unlock();
}
{
struct genl_multicast_group *grp, *tmp;
+ genl_lock();
list_for_each_entry_safe(grp, tmp, &family->mcast_groups, list)
- genl_unregister_mc_group(family, grp);
+ __genl_unregister_mc_group(family, grp);
+ genl_unlock();
}
/**
BUILD_BUG_ON(sizeof(struct rxrpc_skb_priv) > sizeof(dummy_skb->cb));
- rxrpc_epoch = htonl(xtime.tv_sec);
+ rxrpc_epoch = htonl(get_seconds());
ret = -ENOMEM;
rxrpc_call_jar = kmem_cache_create(
struct rb_node *p, *parent, **pp;
_enter("%p{%x},%x,%hx,",
- rx, key_serial(key), trans->debug_id, ntohl(service_id));
+ rx, key_serial(key), trans->debug_id, ntohs(service_id));
if (rx->trans == trans && rx->bundle) {
atomic_inc(&rx->bundle->usage);
ASSERTCMP(atomic_read(&conn->usage), >, 0);
- conn->put_time = xtime.tv_sec;
+ conn->put_time = get_seconds();
if (atomic_dec_and_test(&conn->usage)) {
_debug("zombie");
rxrpc_queue_delayed_work(&rxrpc_connection_reap, 0);
_enter("");
- now = xtime.tv_sec;
+ now = get_seconds();
earliest = ULONG_MAX;
write_lock_bh(&rxrpc_connection_lock);
ASSERTCMP(atomic_read(&trans->usage), >, 0);
- trans->put_time = xtime.tv_sec;
+ trans->put_time = get_seconds();
if (unlikely(atomic_dec_and_test(&trans->usage)))
_debug("zombie");
/* let the reaper determine the timeout to avoid a race with
_enter("");
- now = xtime.tv_sec;
+ now = get_seconds();
earliest = ULONG_MAX;
/* extract all the transports that have been dead too long */
issue = be32_to_cpu(stamp);
}
p += 4;
- now = xtime.tv_sec;
+ now = get_seconds();
_debug("KIV ISSUE: %lx [%lx]", issue, now);
/* check the ticket is in date */
new->h.flavour = &svcauthops_gss;
new->pseudoflavor = pseudoflavor;
+ stat = 0;
test = auth_domain_lookup(name, &new->h);
- if (test != &new->h) { /* XXX Duplicate registration? */
- auth_domain_put(&new->h);
- /* dangling ref-count... */
- goto out;
+ if (test != &new->h) { /* Duplicate registration */
+ auth_domain_put(test);
+ kfree(new->h.name);
+ goto out_free_dom;
}
return 0;
case AF_INET:
snprintf(buf, len, "%u.%u.%u.%u, port=%u",
NIPQUAD(((struct sockaddr_in *) addr)->sin_addr),
- htons(((struct sockaddr_in *) addr)->sin_port));
+ ntohs(((struct sockaddr_in *) addr)->sin_port));
break;
case AF_INET6:
snprintf(buf, len, "%x:%x:%x:%x:%x:%x:%x:%x, port=%u",
NIP6(((struct sockaddr_in6 *) addr)->sin6_addr),
- htons(((struct sockaddr_in6 *) addr)->sin6_port));
+ ntohs(((struct sockaddr_in6 *) addr)->sin6_port));
break;
default:
u32 pos, u32 mask, u32 val)
{
val = (val & mask) << pos;
- val = htonl(val);
- mask = htonl(mask << pos);
- m->hdr[w] &= ~mask;
- m->hdr[w] |= val;
+ m->hdr[w] &= ~htonl(mask << pos);
+ m->hdr[w] |= htonl(val);
}
/*
cmd_link_multi-y = $(LD) $(ld_flags) -r -o $@ $(link_multi_deps)
quiet_cmd_link_multi-m = LD [M] $@
-cmd_link_multi-m = $(LD) $(ld_flags) $(LDFLAGS_MODULE) -o $@ $(link_multi_deps)
+cmd_link_multi-m = $(cmd_link_multi-y)
# We would rather have a list of rules like
# foo.o: $(foo-objs)
# Step 2), invoke modpost
# Includes step 3,4
+modpost = scripts/mod/modpost \
+ $(if $(CONFIG_MODVERSIONS),-m) \
+ $(if $(CONFIG_MODULE_SRCVERSION_ALL),-a,) \
+ $(if $(KBUILD_EXTMOD),-i,-o) $(kernelsymfile) \
+ $(if $(KBUILD_EXTMOD),-I $(modulesymfile)) \
+ $(if $(KBUILD_EXTMOD),-o $(modulesymfile)) \
+ $(if $(KBUILD_EXTMOD)$(KBUILD_MODPOST_WARN),-w)
+
quiet_cmd_modpost = MODPOST $(words $(filter-out vmlinux FORCE, $^)) modules
- cmd_modpost = scripts/mod/modpost \
- $(if $(CONFIG_MODVERSIONS),-m) \
- $(if $(CONFIG_MODULE_SRCVERSION_ALL),-a,) \
- $(if $(KBUILD_EXTMOD),-i,-o) $(kernelsymfile) \
- $(if $(KBUILD_EXTMOD),-I $(modulesymfile)) \
- $(if $(KBUILD_EXTMOD),-o $(modulesymfile)) \
- $(if $(KBUILD_EXTMOD)$(KBUILD_MODPOST_WARN),-w)
+ cmd_modpost = $(modpost) -s
PHONY += __modpost
__modpost: $(modules:.ko=.o) FORCE
$(call cmd,modpost) $(wildcard vmlinux) $(filter-out FORCE,$^)
quiet_cmd_kernel-mod = MODPOST $@
- cmd_kernel-mod = $(cmd_modpost) $@
+ cmd_kernel-mod = $(modpost) $@
-PHONY += vmlinux
vmlinux.o: FORCE
$(call cmd,kernel-mod)
# Step 6), final link of the modules
quiet_cmd_ld_ko_o = LD [M] $@
- cmd_ld_ko_o = $(LD) $(LDFLAGS) $(LDFLAGS_MODULE) -o $@ \
+ cmd_ld_ko_o = $(LD) -r $(LDFLAGS) $(LDFLAGS_MODULE) -o $@ \
$(filter-out FORCE,$^)
$(modules): %.ko :%.o %.mod.o FORCE
static char nohelp_text[] = N_("Sorry, no help available for this option yet.\n");
+static const char *get_help(struct menu *menu)
+{
+ if (menu_has_help(menu))
+ return menu_get_help(menu);
+ else
+ return nohelp_text;
+}
+
static void strip(char *str)
{
char *p = str;
int conf_string(struct menu *menu)
{
struct symbol *sym = menu->sym;
- const char *def, *help;
+ const char *def;
while (1) {
printf("%*s%s ", indent - 1, "", menu->prompt->text);
case '?':
/* print help */
if (line[1] == '\n') {
- help = nohelp_text;
- if (menu->sym->help)
- help = menu->sym->help;
- printf("\n%s\n", menu->sym->help);
+ printf("\n%s\n", get_help(menu));
def = NULL;
break;
}
struct symbol *sym = menu->sym;
int type;
tristate oldval, newval;
- const char *help;
while (1) {
printf("%*s%s ", indent - 1, "", menu->prompt->text);
printf("/m");
if (oldval != yes && sym_tristate_within_range(sym, yes))
printf("/y");
- if (sym->help)
+ if (menu_has_help(menu))
printf("/?");
printf("] ");
conf_askvalue(sym, sym_get_string_value(sym));
if (sym_set_tristate_value(sym, newval))
return 0;
help:
- help = nohelp_text;
- if (sym->help)
- help = sym->help;
- printf("\n%s\n", help);
+ printf("\n%s\n", get_help(menu));
}
}
goto conf_childs;
}
printf("[1-%d", cnt);
- if (sym->help)
+ if (menu_has_help(menu))
printf("?");
printf("]: ");
switch (input_mode) {
fgets(line, 128, stdin);
strip(line);
if (line[0] == '?') {
- printf("\n%s\n", menu->sym->help ?
- menu->sym->help : nohelp_text);
+ printf("\n%s\n", get_help(menu));
continue;
}
if (!line[0])
if (!child)
continue;
if (line[strlen(line) - 1] == '?') {
- printf("\n%s\n", child->sym->help ?
- child->sym->help : nohelp_text);
+ printf("\n%s\n", get_help(child));
continue;
}
sym_set_choice_value(sym, child->sym);
struct symbol {
struct symbol *next;
char *name;
- char *help;
enum symbol_type type;
struct symbol_value curr;
struct symbol_value def[4];
tristate visible;
int flags;
struct property *prop;
- struct expr *dep, *dep2;
struct expr_value rev_dep;
};
struct property *prompt;
struct expr *dep;
unsigned int flags;
- //char *help;
+ char *help;
struct file *file;
int lineno;
void *data;
static gboolean show_debug = FALSE;
static gboolean resizeable = FALSE;
-static char nohelp_text[] =
- N_("Sorry, no help available for this option yet.\n");
-
GtkWidget *main_wnd = NULL;
GtkWidget *tree1_w = NULL; // left frame
GtkWidget *tree2_w = NULL; // right frame
GtkTextIter start, end;
const char *prompt = menu_get_prompt(menu);
gchar *name;
- const char *help = _(nohelp_text);
+ const char *help;
- if (!menu->sym)
- help = "";
- else if (menu->sym->help)
- help = _(menu->sym->help);
+ help = _(menu_get_help(menu));
if (menu->sym && menu->sym->name)
name = g_strdup_printf(_(menu->sym->name));
menu->file == NULL ? "Root Menu" : menu->file->name,
menu->lineno);
- if (menu->sym != NULL && menu->sym->help != NULL)
- message__add(menu->sym->help, menu->sym->name,
+ if (menu->sym != NULL && menu_has_help(menu))
+ message__add(menu_get_help(menu), menu->sym->name,
menu->file == NULL ? "Root Menu" : menu->file->name,
menu->lineno);
P(menu_get_prompt,const char *,(struct menu *menu));
P(menu_get_root_menu,struct menu *,(struct menu *menu));
P(menu_get_parent_menu,struct menu *,(struct menu *menu));
+P(menu_has_help,bool,(struct menu *menu));
+P(menu_get_help,const char *,(struct menu *menu));
/* symbol.c */
P(symbol_hash,struct symbol *,[SYMBOL_HASHSIZE]);
struct gstr help = str_new();
struct symbol *sym = menu->sym;
- if (sym->help)
+ if (menu_has_help(menu))
{
if (sym->name) {
str_printf(&help, "CONFIG_%s:\n\n", sym->name);
- str_append(&help, _(sym->help));
+ str_append(&help, _(menu_get_help(menu)));
str_append(&help, "\n");
}
} else {
return menu;
}
+bool menu_has_help(struct menu *menu)
+{
+ return menu->help != NULL;
+}
+
+const char *menu_get_help(struct menu *menu)
+{
+ if (menu->help)
+ return menu->help;
+ else
+ return "";
+}
if (showDebug())
debug = debug_info(sym);
- help = print_filter(_(sym->help));
+ help = print_filter(_(menu_get_help(menu)));
} else if (menu->prompt) {
head += "<big><b>";
head += print_filter(_(menu->prompt->text));
case 83:
{
- current_entry->sym->help = (yyvsp[0].string);
+ current_entry->help = (yyvsp[0].string);
;}
break;
break;
}
}
- if (sym->help) {
- int len = strlen(sym->help);
- while (sym->help[--len] == '\n')
- sym->help[len] = 0;
- fprintf(out, " help\n%s\n", sym->help);
+ if (menu->help) {
+ int len = strlen(menu->help);
+ while (menu->help[--len] == '\n')
+ menu->help[len] = 0;
+ fprintf(out, " help\n%s\n", menu->help);
}
fputc('\n', out);
}
help: help_start T_HELPTEXT
{
- current_entry->sym->help = $2;
+ current_entry->help = $2;
};
/* depends option */
break;
}
}
- if (sym->help) {
- int len = strlen(sym->help);
- while (sym->help[--len] == '\n')
- sym->help[len] = 0;
- fprintf(out, " help\n%s\n", sym->help);
+ if (menu->help) {
+ int len = strlen(menu->help);
+ while (menu->help[--len] == '\n')
+ menu->help[len] = 0;
+ fprintf(out, " help\n%s\n", menu->help);
}
fputc('\n', out);
}
return 1;
}
+/* looks like: "acpi:ACPI0003 or acpi:PNP0C0B" or "acpi:LNXVIDEO" */
+static int do_acpi_entry(const char *filename,
+ struct acpi_device_id *id, char *alias)
+{
+ sprintf(alias, "acpi*:%s:", id->id);
+ return 1;
+}
+
/* looks like: "pnp:dD" */
static int do_pnp_entry(const char *filename,
struct pnp_device_id *id, char *alias)
do_table(symval, sym->st_size,
sizeof(struct serio_device_id), "serio",
do_serio_entry, mod);
+ else if (sym_is(symname, "__mod_acpi_device_table"))
+ do_table(symval, sym->st_size,
+ sizeof(struct acpi_device_id), "acpi",
+ do_acpi_entry, mod);
else if (sym_is(symname, "__mod_pnp_device_table"))
do_table(symval, sym->st_size,
sizeof(struct pnp_device_id), "pnp",
static int all_versions = 0;
/* If we are modposting external module set to 1 */
static int external_module = 0;
+/* Warn about section mismatch in vmlinux if set to 1 */
+static int vmlinux_section_warnings = 1;
/* Only warn about unresolved symbols */
static int warn_unresolved = 0;
/* How a symbol is exported */
return memcmp(s + slen - sublen, sub, sublen);
}
+/*
+ * Functions used only during module init is marked __init and is stored in
+ * a .init.text section. Likewise data is marked __initdata and stored in
+ * a .init.data section.
+ * If this section is one of these sections return 1
+ * See include/linux/init.h for the details
+ */
+static int init_section(const char *name)
+{
+ if (strcmp(name, ".init") == 0)
+ return 1;
+ if (strncmp(name, ".init.", strlen(".init.")) == 0)
+ return 1;
+ return 0;
+}
+
+/*
+ * Functions used only during module exit is marked __exit and is stored in
+ * a .exit.text section. Likewise data is marked __exitdata and stored in
+ * a .exit.data section.
+ * If this section is one of these sections return 1
+ * See include/linux/init.h for the details
+ **/
+static int exit_section(const char *name)
+{
+ if (strcmp(name, ".exit.text") == 0)
+ return 1;
+ if (strcmp(name, ".exit.data") == 0)
+ return 1;
+ return 0;
+
+}
+
+/*
+ * Data sections are named like this:
+ * .data | .data.rel | .data.rel.*
+ * Return 1 if the specified section is a data section
+ */
+static int data_section(const char *name)
+{
+ if ((strcmp(name, ".data") == 0) ||
+ (strcmp(name, ".data.rel") == 0) ||
+ (strncmp(name, ".data.rel.", strlen(".data.rel.")) == 0))
+ return 1;
+ else
+ return 0;
+}
+
/**
* Whitelist to allow certain references to pass with no warning.
*
* Pattern 0:
* Do not warn if funtion/data are marked with __init_refok/__initdata_refok.
* The pattern is identified by:
- * fromsec = .text.init.refok | .data.init.refok
+ * fromsec = .text.init.refok* | .data.init.refok*
*
* Pattern 1:
* If a module parameter is declared __initdata and permissions=0
* These functions may often be marked __init and we do not want to
* warn here.
* the pattern is identified by:
- * tosec = .init.text | .exit.text | .init.data
- * fromsec = .data | .data.rel | .data.rel.*
+ * tosec = init or exit section
+ * fromsec = data section
* atsym = *driver, *_template, *_sht, *_ops, *_probe, *probe_one, *_console, *_timer
*
* Pattern 3:
* This pattern is identified by
* refsymname = __init_begin, _sinittext, _einittext
*
+ * Pattern 5:
+ * Xtensa uses literal sections for constants that are accessed PC-relative.
+ * Literal sections may safely reference their text sections.
+ * (Note that the name for the literal section omits any trailing '.text')
+ * tosec = <section>[.text]
+ * fromsec = <section>.literal
**/
static int secref_whitelist(const char *modname, const char *tosec,
const char *fromsec, const char *atsym,
const char *refsymname)
{
- int f1 = 1, f2 = 1;
+ int len;
const char **s;
const char *pat2sym[] = {
"driver",
};
/* Check for pattern 0 */
- if ((strcmp(fromsec, ".text.init.refok") == 0) ||
- (strcmp(fromsec, ".data.init.refok") == 0))
+ if ((strncmp(fromsec, ".text.init.refok", strlen(".text.init.refok")) == 0) ||
+ (strncmp(fromsec, ".data.init.refok", strlen(".data.init.refok")) == 0))
return 1;
/* Check for pattern 1 */
- if (strcmp(tosec, ".init.data") != 0)
- f1 = 0;
- if (strncmp(fromsec, ".data", strlen(".data")) != 0)
- f1 = 0;
- if (strncmp(atsym, "__param", strlen("__param")) != 0)
- f1 = 0;
-
- if (f1)
- return f1;
+ if ((strcmp(tosec, ".init.data") == 0) &&
+ (strncmp(fromsec, ".data", strlen(".data")) == 0) &&
+ (strncmp(atsym, "__param", strlen("__param")) == 0))
+ return 1;
/* Check for pattern 2 */
- if ((strcmp(tosec, ".init.text") != 0) &&
- (strcmp(tosec, ".exit.text") != 0) &&
- (strcmp(tosec, ".init.data") != 0))
- f2 = 0;
- if ((strcmp(fromsec, ".data") != 0) &&
- (strcmp(fromsec, ".data.rel") != 0) &&
- (strncmp(fromsec, ".data.rel.", strlen(".data.rel.")) != 0))
- f2 = 0;
-
- for (s = pat2sym; *s; s++)
- if (strrcmp(atsym, *s) == 0)
- f1 = 1;
- if (f1 && f2)
- return 1;
+ if ((init_section(tosec) || exit_section(tosec)) && data_section(fromsec))
+ for (s = pat2sym; *s; s++)
+ if (strrcmp(atsym, *s) == 0)
+ return 1;
/* Check for pattern 3 */
if ((strcmp(fromsec, ".text.head") == 0) &&
if (strcmp(refsymname, *s) == 0)
return 1;
+ /* Check for pattern 5 */
+ if (strrcmp(tosec, ".text") == 0)
+ len = strlen(tosec) - strlen(".text");
+ else
+ len = strlen(tosec);
+ if ((strncmp(tosec, fromsec, len) == 0) && (strlen(fromsec) > len) &&
+ (strcmp(fromsec + len, ".literal") == 0))
+ return 1;
+
return 0;
}
refsymname = elf->strtab + refsym->st_name;
/* check whitelist - we may ignore it */
- if (before &&
- secref_whitelist(modname, secname, fromsec,
- elf->strtab + before->st_name, refsymname))
+ if (secref_whitelist(modname, secname, fromsec,
+ before ? elf->strtab + before->st_name : "",
+ refsymname))
return;
if (before && after) {
".smp_locks",
".stab",
".m68k_fixup",
+ ".xt.prop", /* xtensa informational section */
+ ".xt.lit", /* xtensa informational section */
NULL
};
/* Start of section names */
return 0;
}
-/**
- * Functions used only during module init is marked __init and is stored in
- * a .init.text section. Likewise data is marked __initdata and stored in
- * a .init.data section.
- * If this section is one of these sections return 1
- * See include/linux/init.h for the details
- **/
-static int init_section(const char *name)
-{
- if (strcmp(name, ".init") == 0)
- return 1;
- if (strncmp(name, ".init.", strlen(".init.")) == 0)
- return 1;
- return 0;
-}
/*
* Identify sections from which references to a .init section is OK.
return 0;
}
-/*
- * Functions used only during module exit is marked __exit and is stored in
- * a .exit.text section. Likewise data is marked __exitdata and stored in
- * a .exit.data section.
- * If this section is one of these sections return 1
- * See include/linux/init.h for the details
- **/
-static int exit_section(const char *name)
-{
- if (strcmp(name, ".exit.text") == 0)
- return 1;
- if (strcmp(name, ".exit.data") == 0)
- return 1;
- return 0;
-
-}
-
/*
* Identify sections from which references to a .exit section is OK.
*/
handle_modversions(mod, &info, sym, symname);
handle_moddevtable(mod, &info, sym, symname);
}
- check_sec_ref(mod, modname, &info, init_section, init_section_ref_ok);
- check_sec_ref(mod, modname, &info, exit_section, exit_section_ref_ok);
+ if (is_vmlinux(modname) && vmlinux_section_warnings) {
+ check_sec_ref(mod, modname, &info, init_section, init_section_ref_ok);
+ check_sec_ref(mod, modname, &info, exit_section, exit_section_ref_ok);
+ }
version = get_modinfo(info.modinfo, info.modinfo_len, "version");
if (version)
int opt;
int err;
- while ((opt = getopt(argc, argv, "i:I:mo:aw")) != -1) {
+ while ((opt = getopt(argc, argv, "i:I:mso:aw")) != -1) {
switch(opt) {
case 'i':
kernel_read = optarg;
case 'a':
all_versions = 1;
break;
+ case 's':
+ vmlinux_section_warnings = 0;
+ break;
case 'w':
warn_unresolved = 1;
break;
'NR==1{print "nfs-utils ", $NF}'
ls -l `ldd /bin/sh | awk '/libc/{print $3}'` | sed \
--e 's/\.so$//' | awk -F'[.-]' '{print "Linux C Library " \
-$(NF-2)"."$(NF-1)"."$NF}'
+-e 's/\.so$//' | sed -e 's/>//' | \
+awk -F'[.-]' '{print "Linux C Library "$(NF-1)"."$NF}'
ldd -v > /dev/null 2>&1 && ldd -v || ldd --version |head -n 1 | awk \
'NR==1{print "Dynamic linker (ldd) ", $NF}'
cache->type = NETLBL_CACHE_T_MLS;
if (ebitmap_cpy(&cache->data.mls_label.level[0].cat,
- &ctx->range.level[0].cat) != 0)
+ &ctx->range.level[0].cat) != 0) {
+ kfree(cache);
return;
+ }
cache->data.mls_label.level[1].cat.highbit =
cache->data.mls_label.level[0].cat.highbit;
cache->data.mls_label.level[1].cat.node =
return -ENOMEM;
*ctxp = ctx = kmalloc(sizeof(*ctx) +
- uctx->ctx_len,
+ uctx->ctx_len + 1,
GFP_KERNEL);
if (!ctx)
memcpy(ctx->ctx_str,
uctx+1,
ctx->ctx_len);
+ ctx->ctx_str[ctx->ctx_len] = 0;
rc = security_context_to_sid(ctx->ctx_str,
ctx->ctx_len,
&ctx->ctx_sid);
gsr_bits = 0;
#ifdef CONFIG_PXA27x
/* PXA27x Developers Manual section 13.5.2.2.1 */
- pxa_set_cken(1 << 31, 1);
+ pxa_set_cken(31, 1);
udelay(5);
- pxa_set_cken(1 << 31, 0);
+ pxa_set_cken(31, 0);
GCR = GCR_COLD_RST;
udelay(50);
#else
git.samba.org / sfrench / cifs-2.6.git / commitdiff