Merge tag 'firewire-updates' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee139...
authorLinus Torvalds <torvalds@linux-foundation.org>
Mon, 30 Jul 2012 16:32:39 +0000 (09:32 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Mon, 30 Jul 2012 16:32:39 +0000 (09:32 -0700)
Pull firewire updates from Stefan Richter:

 - Small fixes and optimizations.

 - A new sysfs attribute to tell local and remote nodes apart.
   Useful to set special permissions/ ownership of local nodes'
   /dev/fw*, to start daemons on them (for diagnostics, management,
   AV targets, VersaPHY initiator or targets...), to pick up their
   GUID to use it as GUID of an SBP2 target instance, and of course
   for informational purposes.

* tag 'firewire-updates' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394:
  firewire: core: document is_local sysfs attribute
  firewire: core: add is_local sysfs device attribute
  firewire: ohci: initialize multiChanMode bits after reset
  firewire: core: fix multichannel IR with buffers larger than 2 GB
  firewire: ohci: sanity-check MMIO resource
  firewire: ohci: lazy bus time initialization
  firewire: core: allocate the low memory region
  firewire: core: make address handler length 64 bits

Documentation/ABI/stable/sysfs-bus-firewire
drivers/firewire/core-device.c
drivers/firewire/core-iso.c
drivers/firewire/core-transaction.c
drivers/firewire/ohci.c
include/linux/firewire.h

index 3d484e5dc846ed9b7625c83d948322f825c323df..41e5a0cd1e3ed334234c4f3e9e3db1e2fa021dfc 100644 (file)
@@ -39,6 +39,17 @@ Users:               udev rules to set ownership and access permissions or ACLs of
                /dev/fw[0-9]+ character device files
 
 
+What:          /sys/bus/firewire/devices/fw[0-9]+/is_local
+Date:          July 2012
+KernelVersion: 3.6
+Contact:       linux1394-devel@lists.sourceforge.net
+Description:
+               IEEE 1394 node device attribute.
+               Read-only and immutable.
+Values:                1: The sysfs entry represents a local node (a controller card).
+               0: The sysfs entry represents a remote node.
+
+
 What:          /sys/bus/firewire/devices/fw[0-9]+[.][0-9]+/
 Date:          May 2007
 KernelVersion: 2.6.22
index 4d460ef871610d6309a47561bf0c531344e2b7cd..7a05fd24d68b9c126719ac320620dee9343f49a4 100644 (file)
@@ -398,6 +398,14 @@ static ssize_t guid_show(struct device *dev,
        return ret;
 }
 
+static ssize_t is_local_show(struct device *dev,
+                            struct device_attribute *attr, char *buf)
+{
+       struct fw_device *device = fw_device(dev);
+
+       return sprintf(buf, "%u\n", device->is_local);
+}
+
 static int units_sprintf(char *buf, const u32 *directory)
 {
        struct fw_csr_iterator ci;
@@ -447,6 +455,7 @@ static ssize_t units_show(struct device *dev,
 static struct device_attribute fw_device_attributes[] = {
        __ATTR_RO(config_rom),
        __ATTR_RO(guid),
+       __ATTR_RO(is_local),
        __ATTR_RO(units),
        __ATTR_NULL,
 };
index 8382e27e9a271877c98d24ff6268f9d578738b47..38c0aa60b2cb1a53da46547e5bc188a87db1f18b 100644 (file)
@@ -146,7 +146,7 @@ EXPORT_SYMBOL(fw_iso_buffer_destroy);
 /* Convert DMA address to offset into virtually contiguous buffer. */
 size_t fw_iso_buffer_lookup(struct fw_iso_buffer *buffer, dma_addr_t completed)
 {
-       int i;
+       size_t i;
        dma_addr_t address;
        ssize_t offset;
 
index 780708dc6e25f39a9cd181e3a1c0f075ad8f96ee..87d6f2d2f02d015a030cad4001fd59bebeeea9a4 100644 (file)
@@ -525,9 +525,10 @@ const struct fw_address_region fw_high_memory_region =
        { .start = 0x000100000000ULL, .end = 0xffffe0000000ULL,  };
 EXPORT_SYMBOL(fw_high_memory_region);
 
-#if 0
-const struct fw_address_region fw_low_memory_region =
+static const struct fw_address_region low_memory_region =
        { .start = 0x000000000000ULL, .end = 0x000100000000ULL,  };
+
+#if 0
 const struct fw_address_region fw_private_region =
        { .start = 0xffffe0000000ULL, .end = 0xfffff0000000ULL,  };
 const struct fw_address_region fw_csr_region =
@@ -1198,6 +1199,23 @@ static struct fw_address_handler registers = {
        .address_callback       = handle_registers,
 };
 
+static void handle_low_memory(struct fw_card *card, struct fw_request *request,
+               int tcode, int destination, int source, int generation,
+               unsigned long long offset, void *payload, size_t length,
+               void *callback_data)
+{
+       /*
+        * This catches requests not handled by the physical DMA unit,
+        * i.e., wrong transaction types or unauthorized source nodes.
+        */
+       fw_send_response(card, request, RCODE_TYPE_ERROR);
+}
+
+static struct fw_address_handler low_memory = {
+       .length                 = 0x000100000000ULL,
+       .address_callback       = handle_low_memory,
+};
+
 MODULE_AUTHOR("Kristian Hoegsberg <krh@bitplanet.net>");
 MODULE_DESCRIPTION("Core IEEE1394 transaction logic");
 MODULE_LICENSE("GPL");
@@ -1259,6 +1277,7 @@ static int __init fw_core_init(void)
 
        fw_core_add_address_handler(&topology_map, &topology_map_region);
        fw_core_add_address_handler(&registers, &registers_region);
+       fw_core_add_address_handler(&low_memory, &low_memory_region);
        fw_core_add_descriptor(&vendor_id_descriptor);
        fw_core_add_descriptor(&model_id_descriptor);
 
index c1af05e834b610e98acba423c6e811239c9d908e..c788dbdaf3bc6b51f779079909e339d26b063e25 100644 (file)
@@ -191,6 +191,7 @@ struct fw_ohci {
        unsigned quirks;
        unsigned int pri_req_max;
        u32 bus_time;
+       bool bus_time_running;
        bool is_root;
        bool csr_state_setclear_abdicate;
        int n_ir;
@@ -1726,6 +1727,13 @@ static u32 update_bus_time(struct fw_ohci *ohci)
 {
        u32 cycle_time_seconds = get_cycle_time(ohci) >> 25;
 
+       if (unlikely(!ohci->bus_time_running)) {
+               reg_write(ohci, OHCI1394_IntMaskSet, OHCI1394_cycle64Seconds);
+               ohci->bus_time = (lower_32_bits(get_seconds()) & ~0x7f) |
+                                (cycle_time_seconds & 0x40);
+               ohci->bus_time_running = true;
+       }
+
        if ((ohci->bus_time & 0x40) != (cycle_time_seconds & 0x40))
                ohci->bus_time += 0x40;
 
@@ -2213,7 +2221,7 @@ static int ohci_enable(struct fw_card *card,
 {
        struct fw_ohci *ohci = fw_ohci(card);
        struct pci_dev *dev = to_pci_dev(card->device);
-       u32 lps, seconds, version, irqs;
+       u32 lps, version, irqs;
        int i, ret;
 
        if (software_reset(ohci)) {
@@ -2269,9 +2277,12 @@ static int ohci_enable(struct fw_card *card,
                  (OHCI1394_MAX_PHYS_RESP_RETRIES << 8) |
                  (200 << 16));
 
-       seconds = lower_32_bits(get_seconds());
-       reg_write(ohci, OHCI1394_IsochronousCycleTimer, seconds << 25);
-       ohci->bus_time = seconds & ~0x3f;
+       ohci->bus_time_running = false;
+
+       for (i = 0; i < 32; i++)
+               if (ohci->ir_context_support & (1 << i))
+                       reg_write(ohci, OHCI1394_IsoRcvContextControlClear(i),
+                                 IR_CONTEXT_MULTI_CHANNEL_MODE);
 
        version = reg_read(ohci, OHCI1394_Version) & 0x00ff00ff;
        if (version >= OHCI_VERSION_1_1) {
@@ -2369,7 +2380,6 @@ static int ohci_enable(struct fw_card *card,
                OHCI1394_postedWriteErr |
                OHCI1394_selfIDComplete |
                OHCI1394_regAccessFail |
-               OHCI1394_cycle64Seconds |
                OHCI1394_cycleInconsistent |
                OHCI1394_unrecoverableError |
                OHCI1394_cycleTooLong |
@@ -2658,7 +2668,8 @@ static void ohci_write_csr(struct fw_card *card, int csr_offset, u32 value)
 
        case CSR_BUS_TIME:
                spin_lock_irqsave(&ohci->lock, flags);
-               ohci->bus_time = (ohci->bus_time & 0x7f) | (value & ~0x7f);
+               ohci->bus_time = (update_bus_time(ohci) & 0x40) |
+                                (value & ~0x7f);
                spin_unlock_irqrestore(&ohci->lock, flags);
                break;
 
@@ -3539,6 +3550,13 @@ static int __devinit pci_probe(struct pci_dev *dev,
 
        INIT_WORK(&ohci->bus_reset_work, bus_reset_work);
 
+       if (!(pci_resource_flags(dev, 0) & IORESOURCE_MEM) ||
+           pci_resource_len(dev, 0) < OHCI1394_REGISTER_SIZE) {
+               dev_err(&dev->dev, "invalid MMIO resource\n");
+               err = -ENXIO;
+               goto fail_disable;
+       }
+
        err = pci_request_region(dev, 0, ohci_driver_name);
        if (err) {
                dev_err(&dev->dev, "MMIO resource unavailable\n");
index 7edcf10317182a32c4ffeef84b5c6dd1d7ed091c..db04ec5121cb770d6c571a59234997c60527e539 100644 (file)
@@ -152,7 +152,7 @@ static inline void fw_card_put(struct fw_card *card)
 struct fw_attribute_group {
        struct attribute_group *groups[2];
        struct attribute_group group;
-       struct attribute *attrs[12];
+       struct attribute *attrs[13];
 };
 
 enum fw_device_state {
@@ -321,7 +321,7 @@ struct fw_transaction {
 
 struct fw_address_handler {
        u64 offset;
-       size_t length;
+       u64 length;
        fw_address_callback_t address_callback;
        void *callback_data;
        struct list_head link;