2 * Contains common pci routines for ALL ppc platform
3 * (based on pci_32.c and pci_64.c)
5 * Port for PPC64 David Engebretsen, IBM Corp.
6 * Contains common pci routines for ppc64 platform, pSeries and iSeries brands.
8 * Copyright (C) 2003 Anton Blanchard <anton@au.ibm.com>, IBM
9 * Rework, based on alpha PCI code.
11 * Common pmac/prep/chrp pci routines. -- Cort
13 * This program is free software; you can redistribute it and/or
14 * modify it under the terms of the GNU General Public License
15 * as published by the Free Software Foundation; either version
16 * 2 of the License, or (at your option) any later version.
19 #include <linux/kernel.h>
20 #include <linux/pci.h>
21 #include <linux/string.h>
22 #include <linux/init.h>
23 #include <linux/bootmem.h>
24 #include <linux/export.h>
25 #include <linux/of_address.h>
26 #include <linux/of_pci.h>
28 #include <linux/list.h>
29 #include <linux/syscalls.h>
30 #include <linux/irq.h>
31 #include <linux/vmalloc.h>
32 #include <linux/slab.h>
33 #include <linux/vgaarb.h>
35 #include <asm/processor.h>
38 #include <asm/pci-bridge.h>
39 #include <asm/byteorder.h>
40 #include <asm/machdep.h>
41 #include <asm/ppc-pci.h>
44 static DEFINE_SPINLOCK(hose_spinlock);
47 /* XXX kill that some day ... */
48 static int global_phb_number; /* Global phb counter */
50 /* ISA Memory physical address */
51 resource_size_t isa_mem_base;
54 static struct dma_map_ops *pci_dma_ops = &dma_direct_ops;
56 void set_pci_dma_ops(struct dma_map_ops *dma_ops)
58 pci_dma_ops = dma_ops;
61 struct dma_map_ops *get_pci_dma_ops(void)
65 EXPORT_SYMBOL(get_pci_dma_ops);
67 struct pci_controller *pcibios_alloc_controller(struct device_node *dev)
69 struct pci_controller *phb;
71 phb = zalloc_maybe_bootmem(sizeof(struct pci_controller), GFP_KERNEL);
74 spin_lock(&hose_spinlock);
75 phb->global_number = global_phb_number++;
76 list_add_tail(&phb->list_node, &hose_list);
77 spin_unlock(&hose_spinlock);
79 phb->is_dynamic = mem_init_done;
82 int nid = of_node_to_nid(dev);
84 if (nid < 0 || !node_online(nid))
87 PHB_SET_NODE(phb, nid);
93 void pcibios_free_controller(struct pci_controller *phb)
95 spin_lock(&hose_spinlock);
96 list_del(&phb->list_node);
97 spin_unlock(&hose_spinlock);
104 * The function is used to return the minimal alignment
105 * for memory or I/O windows of the associated P2P bridge.
106 * By default, 4KiB alignment for I/O windows and 1MiB for
109 resource_size_t pcibios_window_alignment(struct pci_bus *bus,
112 if (ppc_md.pcibios_window_alignment)
113 return ppc_md.pcibios_window_alignment(bus, type);
116 * PCI core will figure out the default
117 * alignment: 4KiB for I/O and 1MiB for
123 static resource_size_t pcibios_io_size(const struct pci_controller *hose)
126 return hose->pci_io_size;
128 return resource_size(&hose->io_resource);
132 int pcibios_vaddr_is_ioport(void __iomem *address)
135 struct pci_controller *hose;
136 resource_size_t size;
138 spin_lock(&hose_spinlock);
139 list_for_each_entry(hose, &hose_list, list_node) {
140 size = pcibios_io_size(hose);
141 if (address >= hose->io_base_virt &&
142 address < (hose->io_base_virt + size)) {
147 spin_unlock(&hose_spinlock);
151 unsigned long pci_address_to_pio(phys_addr_t address)
153 struct pci_controller *hose;
154 resource_size_t size;
155 unsigned long ret = ~0;
157 spin_lock(&hose_spinlock);
158 list_for_each_entry(hose, &hose_list, list_node) {
159 size = pcibios_io_size(hose);
160 if (address >= hose->io_base_phys &&
161 address < (hose->io_base_phys + size)) {
163 (unsigned long)hose->io_base_virt - _IO_BASE;
164 ret = base + (address - hose->io_base_phys);
168 spin_unlock(&hose_spinlock);
172 EXPORT_SYMBOL_GPL(pci_address_to_pio);
175 * Return the domain number for this bus.
177 int pci_domain_nr(struct pci_bus *bus)
179 struct pci_controller *hose = pci_bus_to_host(bus);
181 return hose->global_number;
183 EXPORT_SYMBOL(pci_domain_nr);
185 /* This routine is meant to be used early during boot, when the
186 * PCI bus numbers have not yet been assigned, and you need to
187 * issue PCI config cycles to an OF device.
188 * It could also be used to "fix" RTAS config cycles if you want
189 * to set pci_assign_all_buses to 1 and still use RTAS for PCI
192 struct pci_controller* pci_find_hose_for_OF_device(struct device_node* node)
195 struct pci_controller *hose, *tmp;
196 list_for_each_entry_safe(hose, tmp, &hose_list, list_node)
197 if (hose->dn == node)
204 static ssize_t pci_show_devspec(struct device *dev,
205 struct device_attribute *attr, char *buf)
207 struct pci_dev *pdev;
208 struct device_node *np;
210 pdev = to_pci_dev (dev);
211 np = pci_device_to_OF_node(pdev);
212 if (np == NULL || np->full_name == NULL)
214 return sprintf(buf, "%s", np->full_name);
216 static DEVICE_ATTR(devspec, S_IRUGO, pci_show_devspec, NULL);
218 /* Add sysfs properties */
219 int pcibios_add_platform_entries(struct pci_dev *pdev)
221 return device_create_file(&pdev->dev, &dev_attr_devspec);
225 * Reads the interrupt pin to determine if interrupt is use by card.
226 * If the interrupt is used, then gets the interrupt line from the
227 * openfirmware and sets it in the pci_dev and pci_config line.
229 static int pci_read_irq_line(struct pci_dev *pci_dev)
234 pr_debug("PCI: Try to map irq for %s...\n", pci_name(pci_dev));
237 memset(&oirq, 0xff, sizeof(oirq));
239 /* Try to get a mapping from the device-tree */
240 if (of_irq_map_pci(pci_dev, &oirq)) {
243 /* If that fails, lets fallback to what is in the config
244 * space and map that through the default controller. We
245 * also set the type to level low since that's what PCI
246 * interrupts are. If your platform does differently, then
247 * either provide a proper interrupt tree or don't use this
250 if (pci_read_config_byte(pci_dev, PCI_INTERRUPT_PIN, &pin))
254 if (pci_read_config_byte(pci_dev, PCI_INTERRUPT_LINE, &line) ||
255 line == 0xff || line == 0) {
258 pr_debug(" No map ! Using line %d (pin %d) from PCI config\n",
261 virq = irq_create_mapping(NULL, line);
263 irq_set_irq_type(virq, IRQ_TYPE_LEVEL_LOW);
265 pr_debug(" Got one, spec %d cells (0x%08x 0x%08x...) on %s\n",
266 oirq.size, oirq.specifier[0], oirq.specifier[1],
267 of_node_full_name(oirq.controller));
269 virq = irq_create_of_mapping(oirq.controller, oirq.specifier,
273 pr_debug(" Failed to map !\n");
277 pr_debug(" Mapped to linux irq %d\n", virq);
285 * Platform support for /proc/bus/pci/X/Y mmap()s,
286 * modelled on the sparc64 implementation by Dave Miller.
291 * Adjust vm_pgoff of VMA such that it is the physical page offset
292 * corresponding to the 32-bit pci bus offset for DEV requested by the user.
294 * Basically, the user finds the base address for his device which he wishes
295 * to mmap. They read the 32-bit value from the config space base register,
296 * add whatever PAGE_SIZE multiple offset they wish, and feed this into the
297 * offset parameter of mmap on /proc/bus/pci/XXX for that device.
299 * Returns negative error code on failure, zero on success.
301 static struct resource *__pci_mmap_make_offset(struct pci_dev *dev,
302 resource_size_t *offset,
303 enum pci_mmap_state mmap_state)
305 struct pci_controller *hose = pci_bus_to_host(dev->bus);
306 unsigned long io_offset = 0;
310 return NULL; /* should never happen */
312 /* If memory, add on the PCI bridge address offset */
313 if (mmap_state == pci_mmap_mem) {
314 #if 0 /* See comment in pci_resource_to_user() for why this is disabled */
315 *offset += hose->pci_mem_offset;
317 res_bit = IORESOURCE_MEM;
319 io_offset = (unsigned long)hose->io_base_virt - _IO_BASE;
320 *offset += io_offset;
321 res_bit = IORESOURCE_IO;
325 * Check that the offset requested corresponds to one of the
326 * resources of the device.
328 for (i = 0; i <= PCI_ROM_RESOURCE; i++) {
329 struct resource *rp = &dev->resource[i];
330 int flags = rp->flags;
332 /* treat ROM as memory (should be already) */
333 if (i == PCI_ROM_RESOURCE)
334 flags |= IORESOURCE_MEM;
336 /* Active and same type? */
337 if ((flags & res_bit) == 0)
340 /* In the range of this resource? */
341 if (*offset < (rp->start & PAGE_MASK) || *offset > rp->end)
344 /* found it! construct the final physical address */
345 if (mmap_state == pci_mmap_io)
346 *offset += hose->io_base_phys - io_offset;
354 * Set vm_page_prot of VMA, as appropriate for this architecture, for a pci
357 static pgprot_t __pci_mmap_set_pgprot(struct pci_dev *dev, struct resource *rp,
359 enum pci_mmap_state mmap_state,
363 /* Write combine is always 0 on non-memory space mappings. On
364 * memory space, if the user didn't pass 1, we check for a
365 * "prefetchable" resource. This is a bit hackish, but we use
366 * this to workaround the inability of /sysfs to provide a write
369 if (mmap_state != pci_mmap_mem)
371 else if (write_combine == 0) {
372 if (rp->flags & IORESOURCE_PREFETCH)
376 /* XXX would be nice to have a way to ask for write-through */
378 return pgprot_noncached_wc(protection);
380 return pgprot_noncached(protection);
384 * This one is used by /dev/mem and fbdev who have no clue about the
385 * PCI device, it tries to find the PCI device first and calls the
388 pgprot_t pci_phys_mem_access_prot(struct file *file,
393 struct pci_dev *pdev = NULL;
394 struct resource *found = NULL;
395 resource_size_t offset = ((resource_size_t)pfn) << PAGE_SHIFT;
398 if (page_is_ram(pfn))
401 prot = pgprot_noncached(prot);
402 for_each_pci_dev(pdev) {
403 for (i = 0; i <= PCI_ROM_RESOURCE; i++) {
404 struct resource *rp = &pdev->resource[i];
405 int flags = rp->flags;
407 /* Active and same type? */
408 if ((flags & IORESOURCE_MEM) == 0)
410 /* In the range of this resource? */
411 if (offset < (rp->start & PAGE_MASK) ||
421 if (found->flags & IORESOURCE_PREFETCH)
422 prot = pgprot_noncached_wc(prot);
426 pr_debug("PCI: Non-PCI map for %llx, prot: %lx\n",
427 (unsigned long long)offset, pgprot_val(prot));
434 * Perform the actual remap of the pages for a PCI device mapping, as
435 * appropriate for this architecture. The region in the process to map
436 * is described by vm_start and vm_end members of VMA, the base physical
437 * address is found in vm_pgoff.
438 * The pci device structure is provided so that architectures may make mapping
439 * decisions on a per-device or per-bus basis.
441 * Returns a negative error code on failure, zero on success.
443 int pci_mmap_page_range(struct pci_dev *dev, struct vm_area_struct *vma,
444 enum pci_mmap_state mmap_state, int write_combine)
446 resource_size_t offset =
447 ((resource_size_t)vma->vm_pgoff) << PAGE_SHIFT;
451 rp = __pci_mmap_make_offset(dev, &offset, mmap_state);
455 vma->vm_pgoff = offset >> PAGE_SHIFT;
456 vma->vm_page_prot = __pci_mmap_set_pgprot(dev, rp,
458 mmap_state, write_combine);
460 ret = remap_pfn_range(vma, vma->vm_start, vma->vm_pgoff,
461 vma->vm_end - vma->vm_start, vma->vm_page_prot);
466 /* This provides legacy IO read access on a bus */
467 int pci_legacy_read(struct pci_bus *bus, loff_t port, u32 *val, size_t size)
469 unsigned long offset;
470 struct pci_controller *hose = pci_bus_to_host(bus);
471 struct resource *rp = &hose->io_resource;
474 /* Check if port can be supported by that bus. We only check
475 * the ranges of the PHB though, not the bus itself as the rules
476 * for forwarding legacy cycles down bridges are not our problem
477 * here. So if the host bridge supports it, we do it.
479 offset = (unsigned long)hose->io_base_virt - _IO_BASE;
482 if (!(rp->flags & IORESOURCE_IO))
484 if (offset < rp->start || (offset + size) > rp->end)
486 addr = hose->io_base_virt + port;
490 *((u8 *)val) = in_8(addr);
495 *((u16 *)val) = in_le16(addr);
500 *((u32 *)val) = in_le32(addr);
506 /* This provides legacy IO write access on a bus */
507 int pci_legacy_write(struct pci_bus *bus, loff_t port, u32 val, size_t size)
509 unsigned long offset;
510 struct pci_controller *hose = pci_bus_to_host(bus);
511 struct resource *rp = &hose->io_resource;
514 /* Check if port can be supported by that bus. We only check
515 * the ranges of the PHB though, not the bus itself as the rules
516 * for forwarding legacy cycles down bridges are not our problem
517 * here. So if the host bridge supports it, we do it.
519 offset = (unsigned long)hose->io_base_virt - _IO_BASE;
522 if (!(rp->flags & IORESOURCE_IO))
524 if (offset < rp->start || (offset + size) > rp->end)
526 addr = hose->io_base_virt + port;
528 /* WARNING: The generic code is idiotic. It gets passed a pointer
529 * to what can be a 1, 2 or 4 byte quantity and always reads that
530 * as a u32, which means that we have to correct the location of
531 * the data read within those 32 bits for size 1 and 2
535 out_8(addr, val >> 24);
540 out_le16(addr, val >> 16);
551 /* This provides legacy IO or memory mmap access on a bus */
552 int pci_mmap_legacy_page_range(struct pci_bus *bus,
553 struct vm_area_struct *vma,
554 enum pci_mmap_state mmap_state)
556 struct pci_controller *hose = pci_bus_to_host(bus);
557 resource_size_t offset =
558 ((resource_size_t)vma->vm_pgoff) << PAGE_SHIFT;
559 resource_size_t size = vma->vm_end - vma->vm_start;
562 pr_debug("pci_mmap_legacy_page_range(%04x:%02x, %s @%llx..%llx)\n",
563 pci_domain_nr(bus), bus->number,
564 mmap_state == pci_mmap_mem ? "MEM" : "IO",
565 (unsigned long long)offset,
566 (unsigned long long)(offset + size - 1));
568 if (mmap_state == pci_mmap_mem) {
571 * Because X is lame and can fail starting if it gets an error trying
572 * to mmap legacy_mem (instead of just moving on without legacy memory
573 * access) we fake it here by giving it anonymous memory, effectively
574 * behaving just like /dev/zero
576 if ((offset + size) > hose->isa_mem_size) {
578 "Process %s (pid:%d) mapped non-existing PCI legacy memory for 0%04x:%02x\n",
579 current->comm, current->pid, pci_domain_nr(bus), bus->number);
580 if (vma->vm_flags & VM_SHARED)
581 return shmem_zero_setup(vma);
584 offset += hose->isa_mem_phys;
586 unsigned long io_offset = (unsigned long)hose->io_base_virt - _IO_BASE;
587 unsigned long roffset = offset + io_offset;
588 rp = &hose->io_resource;
589 if (!(rp->flags & IORESOURCE_IO))
591 if (roffset < rp->start || (roffset + size) > rp->end)
593 offset += hose->io_base_phys;
595 pr_debug(" -> mapping phys %llx\n", (unsigned long long)offset);
597 vma->vm_pgoff = offset >> PAGE_SHIFT;
598 vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
599 return remap_pfn_range(vma, vma->vm_start, vma->vm_pgoff,
600 vma->vm_end - vma->vm_start,
604 void pci_resource_to_user(const struct pci_dev *dev, int bar,
605 const struct resource *rsrc,
606 resource_size_t *start, resource_size_t *end)
608 struct pci_controller *hose = pci_bus_to_host(dev->bus);
609 resource_size_t offset = 0;
614 if (rsrc->flags & IORESOURCE_IO)
615 offset = (unsigned long)hose->io_base_virt - _IO_BASE;
617 /* We pass a fully fixed up address to userland for MMIO instead of
618 * a BAR value because X is lame and expects to be able to use that
619 * to pass to /dev/mem !
621 * That means that we'll have potentially 64 bits values where some
622 * userland apps only expect 32 (like X itself since it thinks only
623 * Sparc has 64 bits MMIO) but if we don't do that, we break it on
626 * Hopefully, the sysfs insterface is immune to that gunk. Once X
627 * has been fixed (and the fix spread enough), we can re-enable the
628 * 2 lines below and pass down a BAR value to userland. In that case
629 * we'll also have to re-enable the matching code in
630 * __pci_mmap_make_offset().
635 else if (rsrc->flags & IORESOURCE_MEM)
636 offset = hose->pci_mem_offset;
639 *start = rsrc->start - offset;
640 *end = rsrc->end - offset;
644 * pci_process_bridge_OF_ranges - Parse PCI bridge resources from device tree
645 * @hose: newly allocated pci_controller to be setup
646 * @dev: device node of the host bridge
647 * @primary: set if primary bus (32 bits only, soon to be deprecated)
649 * This function will parse the "ranges" property of a PCI host bridge device
650 * node and setup the resource mapping of a pci controller based on its
653 * Life would be boring if it wasn't for a few issues that we have to deal
656 * - We can only cope with one IO space range and up to 3 Memory space
657 * ranges. However, some machines (thanks Apple !) tend to split their
658 * space into lots of small contiguous ranges. So we have to coalesce.
660 * - We can only cope with all memory ranges having the same offset
661 * between CPU addresses and PCI addresses. Unfortunately, some bridges
662 * are setup for a large 1:1 mapping along with a small "window" which
663 * maps PCI address 0 to some arbitrary high address of the CPU space in
664 * order to give access to the ISA memory hole.
665 * The way out of here that I've chosen for now is to always set the
666 * offset based on the first resource found, then override it if we
667 * have a different offset and the previous was set by an ISA hole.
669 * - Some busses have IO space not starting at 0, which causes trouble with
670 * the way we do our IO resource renumbering. The code somewhat deals with
671 * it for 64 bits but I would expect problems on 32 bits.
673 * - Some 32 bits platforms such as 4xx can have physical space larger than
674 * 32 bits so we need to use 64 bits values for the parsing
676 void pci_process_bridge_OF_ranges(struct pci_controller *hose,
677 struct device_node *dev, int primary)
681 int pna = of_n_addr_cells(dev);
683 int memno = 0, isa_hole = -1;
685 unsigned long long pci_addr, cpu_addr, pci_next, cpu_next, size;
686 unsigned long long isa_mb = 0;
687 struct resource *res;
689 printk(KERN_INFO "PCI host bridge %s %s ranges:\n",
690 dev->full_name, primary ? "(primary)" : "");
692 /* Get ranges property */
693 ranges = of_get_property(dev, "ranges", &rlen);
698 while ((rlen -= np * 4) >= 0) {
699 /* Read next ranges element */
700 pci_space = ranges[0];
701 pci_addr = of_read_number(ranges + 1, 2);
702 cpu_addr = of_translate_address(dev, ranges + 3);
703 size = of_read_number(ranges + pna + 3, 2);
706 /* If we failed translation or got a zero-sized region
707 * (some FW try to feed us with non sensical zero sized regions
708 * such as power3 which look like some kind of attempt at exposing
709 * the VGA memory hole)
711 if (cpu_addr == OF_BAD_ADDR || size == 0)
714 /* Now consume following elements while they are contiguous */
715 for (; rlen >= np * sizeof(u32);
716 ranges += np, rlen -= np * 4) {
717 if (ranges[0] != pci_space)
719 pci_next = of_read_number(ranges + 1, 2);
720 cpu_next = of_translate_address(dev, ranges + 3);
721 if (pci_next != pci_addr + size ||
722 cpu_next != cpu_addr + size)
724 size += of_read_number(ranges + pna + 3, 2);
727 /* Act based on address space type */
729 switch ((pci_space >> 24) & 0x3) {
730 case 1: /* PCI IO space */
732 " IO 0x%016llx..0x%016llx -> 0x%016llx\n",
733 cpu_addr, cpu_addr + size - 1, pci_addr);
735 /* We support only one IO range */
736 if (hose->pci_io_size) {
738 " \\--> Skipped (too many) !\n");
742 /* On 32 bits, limit I/O space to 16MB */
743 if (size > 0x01000000)
746 /* 32 bits needs to map IOs here */
747 hose->io_base_virt = ioremap(cpu_addr, size);
749 /* Expect trouble if pci_addr is not 0 */
752 (unsigned long)hose->io_base_virt;
753 #endif /* CONFIG_PPC32 */
754 /* pci_io_size and io_base_phys always represent IO
755 * space starting at 0 so we factor in pci_addr
757 hose->pci_io_size = pci_addr + size;
758 hose->io_base_phys = cpu_addr - pci_addr;
761 res = &hose->io_resource;
762 res->flags = IORESOURCE_IO;
763 res->start = pci_addr;
765 case 2: /* PCI Memory space */
766 case 3: /* PCI 64 bits Memory space */
768 " MEM 0x%016llx..0x%016llx -> 0x%016llx %s\n",
769 cpu_addr, cpu_addr + size - 1, pci_addr,
770 (pci_space & 0x40000000) ? "Prefetch" : "");
772 /* We support only 3 memory ranges */
775 " \\--> Skipped (too many) !\n");
778 /* Handles ISA memory hole space here */
782 if (primary || isa_mem_base == 0)
783 isa_mem_base = cpu_addr;
784 hose->isa_mem_phys = cpu_addr;
785 hose->isa_mem_size = size;
789 hose->mem_offset[memno] = cpu_addr - pci_addr;
790 res = &hose->mem_resources[memno++];
791 res->flags = IORESOURCE_MEM;
792 if (pci_space & 0x40000000)
793 res->flags |= IORESOURCE_PREFETCH;
794 res->start = cpu_addr;
798 res->name = dev->full_name;
799 res->end = res->start + size - 1;
807 /* Decide whether to display the domain number in /proc */
808 int pci_proc_domain(struct pci_bus *bus)
810 struct pci_controller *hose = pci_bus_to_host(bus);
812 if (!pci_has_flag(PCI_ENABLE_PROC_DOMAINS))
814 if (pci_has_flag(PCI_COMPAT_DOMAIN_0))
815 return hose->global_number != 0;
819 int pcibios_root_bridge_prepare(struct pci_host_bridge *bridge)
821 if (ppc_md.pcibios_root_bridge_prepare)
822 return ppc_md.pcibios_root_bridge_prepare(bridge);
827 /* This header fixup will do the resource fixup for all devices as they are
828 * probed, but not for bridge ranges
830 static void pcibios_fixup_resources(struct pci_dev *dev)
832 struct pci_controller *hose = pci_bus_to_host(dev->bus);
836 printk(KERN_ERR "No host bridge for PCI dev %s !\n",
840 for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
841 struct resource *res = dev->resource + i;
845 /* If we're going to re-assign everything, we mark all resources
846 * as unset (and 0-base them). In addition, we mark BARs starting
847 * at 0 as unset as well, except if PCI_PROBE_ONLY is also set
848 * since in that case, we don't want to re-assign anything
850 if (pci_has_flag(PCI_REASSIGN_ALL_RSRC) ||
851 (res->start == 0 && !pci_has_flag(PCI_PROBE_ONLY))) {
852 /* Only print message if not re-assigning */
853 if (!pci_has_flag(PCI_REASSIGN_ALL_RSRC))
854 pr_debug("PCI:%s Resource %d %016llx-%016llx [%x] "
857 (unsigned long long)res->start,
858 (unsigned long long)res->end,
859 (unsigned int)res->flags);
860 res->end -= res->start;
862 res->flags |= IORESOURCE_UNSET;
866 pr_debug("PCI:%s Resource %d %016llx-%016llx [%x]\n",
868 (unsigned long long)res->start,\
869 (unsigned long long)res->end,
870 (unsigned int)res->flags);
873 /* Call machine specific resource fixup */
874 if (ppc_md.pcibios_fixup_resources)
875 ppc_md.pcibios_fixup_resources(dev);
877 DECLARE_PCI_FIXUP_HEADER(PCI_ANY_ID, PCI_ANY_ID, pcibios_fixup_resources);
879 /* This function tries to figure out if a bridge resource has been initialized
880 * by the firmware or not. It doesn't have to be absolutely bullet proof, but
881 * things go more smoothly when it gets it right. It should covers cases such
882 * as Apple "closed" bridge resources and bare-metal pSeries unassigned bridges
884 static int pcibios_uninitialized_bridge_resource(struct pci_bus *bus,
885 struct resource *res)
887 struct pci_controller *hose = pci_bus_to_host(bus);
888 struct pci_dev *dev = bus->self;
889 resource_size_t offset;
890 struct pci_bus_region region;
894 /* We don't do anything if PCI_PROBE_ONLY is set */
895 if (pci_has_flag(PCI_PROBE_ONLY))
898 /* Job is a bit different between memory and IO */
899 if (res->flags & IORESOURCE_MEM) {
900 pcibios_resource_to_bus(dev, ®ion, res);
902 /* If the BAR is non-0 then it's probably been initialized */
903 if (region.start != 0)
906 /* The BAR is 0, let's check if memory decoding is enabled on
907 * the bridge. If not, we consider it unassigned
909 pci_read_config_word(dev, PCI_COMMAND, &command);
910 if ((command & PCI_COMMAND_MEMORY) == 0)
913 /* Memory decoding is enabled and the BAR is 0. If any of the bridge
914 * resources covers that starting address (0 then it's good enough for
915 * us for memory space)
917 for (i = 0; i < 3; i++) {
918 if ((hose->mem_resources[i].flags & IORESOURCE_MEM) &&
919 hose->mem_resources[i].start == hose->mem_offset[i])
923 /* Well, it starts at 0 and we know it will collide so we may as
924 * well consider it as unassigned. That covers the Apple case.
928 /* If the BAR is non-0, then we consider it assigned */
929 offset = (unsigned long)hose->io_base_virt - _IO_BASE;
930 if (((res->start - offset) & 0xfffffffful) != 0)
933 /* Here, we are a bit different than memory as typically IO space
934 * starting at low addresses -is- valid. What we do instead if that
935 * we consider as unassigned anything that doesn't have IO enabled
936 * in the PCI command register, and that's it.
938 pci_read_config_word(dev, PCI_COMMAND, &command);
939 if (command & PCI_COMMAND_IO)
942 /* It's starting at 0 and IO is disabled in the bridge, consider
949 /* Fixup resources of a PCI<->PCI bridge */
950 static void pcibios_fixup_bridge(struct pci_bus *bus)
952 struct resource *res;
955 struct pci_dev *dev = bus->self;
957 pci_bus_for_each_resource(bus, res, i) {
958 if (!res || !res->flags)
960 if (i >= 3 && bus->self->transparent)
963 /* If we're going to reassign everything, we can
964 * shrink the P2P resource to have size as being
965 * of 0 in order to save space.
967 if (pci_has_flag(PCI_REASSIGN_ALL_RSRC)) {
968 res->flags |= IORESOURCE_UNSET;
974 pr_debug("PCI:%s Bus rsrc %d %016llx-%016llx [%x]\n",
976 (unsigned long long)res->start,\
977 (unsigned long long)res->end,
978 (unsigned int)res->flags);
980 /* Try to detect uninitialized P2P bridge resources,
981 * and clear them out so they get re-assigned later
983 if (pcibios_uninitialized_bridge_resource(bus, res)) {
985 pr_debug("PCI:%s (unassigned)\n", pci_name(dev));
990 void pcibios_setup_bus_self(struct pci_bus *bus)
992 /* Fix up the bus resources for P2P bridges */
993 if (bus->self != NULL)
994 pcibios_fixup_bridge(bus);
996 /* Platform specific bus fixups. This is currently only used
997 * by fsl_pci and I'm hoping to get rid of it at some point
999 if (ppc_md.pcibios_fixup_bus)
1000 ppc_md.pcibios_fixup_bus(bus);
1002 /* Setup bus DMA mappings */
1003 if (ppc_md.pci_dma_bus_setup)
1004 ppc_md.pci_dma_bus_setup(bus);
1007 void pcibios_setup_device(struct pci_dev *dev)
1009 /* Fixup NUMA node as it may not be setup yet by the generic
1010 * code and is needed by the DMA init
1012 set_dev_node(&dev->dev, pcibus_to_node(dev->bus));
1014 /* Hook up default DMA ops */
1015 set_dma_ops(&dev->dev, pci_dma_ops);
1016 set_dma_offset(&dev->dev, PCI_DRAM_OFFSET);
1018 /* Additional platform DMA/iommu setup */
1019 if (ppc_md.pci_dma_dev_setup)
1020 ppc_md.pci_dma_dev_setup(dev);
1022 /* Read default IRQs and fixup if necessary */
1023 pci_read_irq_line(dev);
1024 if (ppc_md.pci_irq_fixup)
1025 ppc_md.pci_irq_fixup(dev);
1028 void pcibios_setup_bus_devices(struct pci_bus *bus)
1030 struct pci_dev *dev;
1032 pr_debug("PCI: Fixup bus devices %d (%s)\n",
1033 bus->number, bus->self ? pci_name(bus->self) : "PHB");
1035 list_for_each_entry(dev, &bus->devices, bus_list) {
1036 /* Cardbus can call us to add new devices to a bus, so ignore
1037 * those who are already fully discovered
1042 pcibios_setup_device(dev);
1046 void pcibios_set_master(struct pci_dev *dev)
1048 /* No special bus mastering setup handling */
1051 void pcibios_fixup_bus(struct pci_bus *bus)
1053 /* When called from the generic PCI probe, read PCI<->PCI bridge
1054 * bases. This is -not- called when generating the PCI tree from
1055 * the OF device-tree.
1057 if (bus->self != NULL)
1058 pci_read_bridge_bases(bus);
1060 /* Now fixup the bus bus */
1061 pcibios_setup_bus_self(bus);
1063 /* Now fixup devices on that bus */
1064 pcibios_setup_bus_devices(bus);
1066 EXPORT_SYMBOL(pcibios_fixup_bus);
1068 void pci_fixup_cardbus(struct pci_bus *bus)
1070 /* Now fixup devices on that bus */
1071 pcibios_setup_bus_devices(bus);
1075 static int skip_isa_ioresource_align(struct pci_dev *dev)
1077 if (pci_has_flag(PCI_CAN_SKIP_ISA_ALIGN) &&
1078 !(dev->bus->bridge_ctl & PCI_BRIDGE_CTL_ISA))
1084 * We need to avoid collisions with `mirrored' VGA ports
1085 * and other strange ISA hardware, so we always want the
1086 * addresses to be allocated in the 0x000-0x0ff region
1089 * Why? Because some silly external IO cards only decode
1090 * the low 10 bits of the IO address. The 0x00-0xff region
1091 * is reserved for motherboard devices that decode all 16
1092 * bits, so it's ok to allocate at, say, 0x2800-0x28ff,
1093 * but we want to try to avoid allocating at 0x2900-0x2bff
1094 * which might have be mirrored at 0x0100-0x03ff..
1096 resource_size_t pcibios_align_resource(void *data, const struct resource *res,
1097 resource_size_t size, resource_size_t align)
1099 struct pci_dev *dev = data;
1100 resource_size_t start = res->start;
1102 if (res->flags & IORESOURCE_IO) {
1103 if (skip_isa_ioresource_align(dev))
1106 start = (start + 0x3ff) & ~0x3ff;
1111 EXPORT_SYMBOL(pcibios_align_resource);
1114 * Reparent resource children of pr that conflict with res
1115 * under res, and make res replace those children.
1117 static int reparent_resources(struct resource *parent,
1118 struct resource *res)
1120 struct resource *p, **pp;
1121 struct resource **firstpp = NULL;
1123 for (pp = &parent->child; (p = *pp) != NULL; pp = &p->sibling) {
1124 if (p->end < res->start)
1126 if (res->end < p->start)
1128 if (p->start < res->start || p->end > res->end)
1129 return -1; /* not completely contained */
1130 if (firstpp == NULL)
1133 if (firstpp == NULL)
1134 return -1; /* didn't find any conflicting entries? */
1135 res->parent = parent;
1136 res->child = *firstpp;
1140 for (p = res->child; p != NULL; p = p->sibling) {
1142 pr_debug("PCI: Reparented %s [%llx..%llx] under %s\n",
1144 (unsigned long long)p->start,
1145 (unsigned long long)p->end, res->name);
1151 * Handle resources of PCI devices. If the world were perfect, we could
1152 * just allocate all the resource regions and do nothing more. It isn't.
1153 * On the other hand, we cannot just re-allocate all devices, as it would
1154 * require us to know lots of host bridge internals. So we attempt to
1155 * keep as much of the original configuration as possible, but tweak it
1156 * when it's found to be wrong.
1158 * Known BIOS problems we have to work around:
1159 * - I/O or memory regions not configured
1160 * - regions configured, but not enabled in the command register
1161 * - bogus I/O addresses above 64K used
1162 * - expansion ROMs left enabled (this may sound harmless, but given
1163 * the fact the PCI specs explicitly allow address decoders to be
1164 * shared between expansion ROMs and other resource regions, it's
1165 * at least dangerous)
1168 * (1) Allocate resources for all buses behind PCI-to-PCI bridges.
1169 * This gives us fixed barriers on where we can allocate.
1170 * (2) Allocate resources for all enabled devices. If there is
1171 * a collision, just mark the resource as unallocated. Also
1172 * disable expansion ROMs during this step.
1173 * (3) Try to allocate resources for disabled devices. If the
1174 * resources were assigned correctly, everything goes well,
1175 * if they weren't, they won't disturb allocation of other
1177 * (4) Assign new addresses to resources which were either
1178 * not configured at all or misconfigured. If explicitly
1179 * requested by the user, configure expansion ROM address
1183 void pcibios_allocate_bus_resources(struct pci_bus *bus)
1187 struct resource *res, *pr;
1189 pr_debug("PCI: Allocating bus resources for %04x:%02x...\n",
1190 pci_domain_nr(bus), bus->number);
1192 pci_bus_for_each_resource(bus, res, i) {
1193 if (!res || !res->flags || res->start > res->end || res->parent)
1196 /* If the resource was left unset at this point, we clear it */
1197 if (res->flags & IORESOURCE_UNSET)
1198 goto clear_resource;
1200 if (bus->parent == NULL)
1201 pr = (res->flags & IORESOURCE_IO) ?
1202 &ioport_resource : &iomem_resource;
1204 pr = pci_find_parent_resource(bus->self, res);
1206 /* this happens when the generic PCI
1207 * code (wrongly) decides that this
1208 * bridge is transparent -- paulus
1214 pr_debug("PCI: %s (bus %d) bridge rsrc %d: %016llx-%016llx "
1215 "[0x%x], parent %p (%s)\n",
1216 bus->self ? pci_name(bus->self) : "PHB",
1218 (unsigned long long)res->start,
1219 (unsigned long long)res->end,
1220 (unsigned int)res->flags,
1221 pr, (pr && pr->name) ? pr->name : "nil");
1223 if (pr && !(pr->flags & IORESOURCE_UNSET)) {
1224 if (request_resource(pr, res) == 0)
1227 * Must be a conflict with an existing entry.
1228 * Move that entry (or entries) under the
1229 * bridge resource and try again.
1231 if (reparent_resources(pr, res) == 0)
1234 pr_warning("PCI: Cannot allocate resource region "
1235 "%d of PCI bridge %d, will remap\n", i, bus->number);
1237 /* The resource might be figured out when doing
1238 * reassignment based on the resources required
1239 * by the downstream PCI devices. Here we set
1240 * the size of the resource to be 0 in order to
1248 list_for_each_entry(b, &bus->children, node)
1249 pcibios_allocate_bus_resources(b);
1252 static inline void alloc_resource(struct pci_dev *dev, int idx)
1254 struct resource *pr, *r = &dev->resource[idx];
1256 pr_debug("PCI: Allocating %s: Resource %d: %016llx..%016llx [%x]\n",
1258 (unsigned long long)r->start,
1259 (unsigned long long)r->end,
1260 (unsigned int)r->flags);
1262 pr = pci_find_parent_resource(dev, r);
1263 if (!pr || (pr->flags & IORESOURCE_UNSET) ||
1264 request_resource(pr, r) < 0) {
1265 printk(KERN_WARNING "PCI: Cannot allocate resource region %d"
1266 " of device %s, will remap\n", idx, pci_name(dev));
1268 pr_debug("PCI: parent is %p: %016llx-%016llx [%x]\n",
1270 (unsigned long long)pr->start,
1271 (unsigned long long)pr->end,
1272 (unsigned int)pr->flags);
1273 /* We'll assign a new address later */
1274 r->flags |= IORESOURCE_UNSET;
1280 static void __init pcibios_allocate_resources(int pass)
1282 struct pci_dev *dev = NULL;
1287 for_each_pci_dev(dev) {
1288 pci_read_config_word(dev, PCI_COMMAND, &command);
1289 for (idx = 0; idx <= PCI_ROM_RESOURCE; idx++) {
1290 r = &dev->resource[idx];
1291 if (r->parent) /* Already allocated */
1293 if (!r->flags || (r->flags & IORESOURCE_UNSET))
1294 continue; /* Not assigned at all */
1295 /* We only allocate ROMs on pass 1 just in case they
1296 * have been screwed up by firmware
1298 if (idx == PCI_ROM_RESOURCE )
1300 if (r->flags & IORESOURCE_IO)
1301 disabled = !(command & PCI_COMMAND_IO);
1303 disabled = !(command & PCI_COMMAND_MEMORY);
1304 if (pass == disabled)
1305 alloc_resource(dev, idx);
1309 r = &dev->resource[PCI_ROM_RESOURCE];
1311 /* Turn the ROM off, leave the resource region,
1312 * but keep it unregistered.
1315 pci_read_config_dword(dev, dev->rom_base_reg, ®);
1316 if (reg & PCI_ROM_ADDRESS_ENABLE) {
1317 pr_debug("PCI: Switching off ROM of %s\n",
1319 r->flags &= ~IORESOURCE_ROM_ENABLE;
1320 pci_write_config_dword(dev, dev->rom_base_reg,
1321 reg & ~PCI_ROM_ADDRESS_ENABLE);
1327 static void __init pcibios_reserve_legacy_regions(struct pci_bus *bus)
1329 struct pci_controller *hose = pci_bus_to_host(bus);
1330 resource_size_t offset;
1331 struct resource *res, *pres;
1334 pr_debug("Reserving legacy ranges for domain %04x\n", pci_domain_nr(bus));
1337 if (!(hose->io_resource.flags & IORESOURCE_IO))
1339 offset = (unsigned long)hose->io_base_virt - _IO_BASE;
1340 res = kzalloc(sizeof(struct resource), GFP_KERNEL);
1341 BUG_ON(res == NULL);
1342 res->name = "Legacy IO";
1343 res->flags = IORESOURCE_IO;
1344 res->start = offset;
1345 res->end = (offset + 0xfff) & 0xfffffffful;
1346 pr_debug("Candidate legacy IO: %pR\n", res);
1347 if (request_resource(&hose->io_resource, res)) {
1349 "PCI %04x:%02x Cannot reserve Legacy IO %pR\n",
1350 pci_domain_nr(bus), bus->number, res);
1355 /* Check for memory */
1356 for (i = 0; i < 3; i++) {
1357 pres = &hose->mem_resources[i];
1358 offset = hose->mem_offset[i];
1359 if (!(pres->flags & IORESOURCE_MEM))
1361 pr_debug("hose mem res: %pR\n", pres);
1362 if ((pres->start - offset) <= 0xa0000 &&
1363 (pres->end - offset) >= 0xbffff)
1368 res = kzalloc(sizeof(struct resource), GFP_KERNEL);
1369 BUG_ON(res == NULL);
1370 res->name = "Legacy VGA memory";
1371 res->flags = IORESOURCE_MEM;
1372 res->start = 0xa0000 + offset;
1373 res->end = 0xbffff + offset;
1374 pr_debug("Candidate VGA memory: %pR\n", res);
1375 if (request_resource(pres, res)) {
1377 "PCI %04x:%02x Cannot reserve VGA memory %pR\n",
1378 pci_domain_nr(bus), bus->number, res);
1383 void __init pcibios_resource_survey(void)
1387 /* Allocate and assign resources */
1388 list_for_each_entry(b, &pci_root_buses, node)
1389 pcibios_allocate_bus_resources(b);
1390 pcibios_allocate_resources(0);
1391 pcibios_allocate_resources(1);
1393 /* Before we start assigning unassigned resource, we try to reserve
1394 * the low IO area and the VGA memory area if they intersect the
1395 * bus available resources to avoid allocating things on top of them
1397 if (!pci_has_flag(PCI_PROBE_ONLY)) {
1398 list_for_each_entry(b, &pci_root_buses, node)
1399 pcibios_reserve_legacy_regions(b);
1402 /* Now, if the platform didn't decide to blindly trust the firmware,
1403 * we proceed to assigning things that were left unassigned
1405 if (!pci_has_flag(PCI_PROBE_ONLY)) {
1406 pr_debug("PCI: Assigning unassigned resources...\n");
1407 pci_assign_unassigned_resources();
1410 /* Call machine dependent fixup */
1411 if (ppc_md.pcibios_fixup)
1412 ppc_md.pcibios_fixup();
1415 /* This is used by the PCI hotplug driver to allocate resource
1416 * of newly plugged busses. We can try to consolidate with the
1417 * rest of the code later, for now, keep it as-is as our main
1418 * resource allocation function doesn't deal with sub-trees yet.
1420 void pcibios_claim_one_bus(struct pci_bus *bus)
1422 struct pci_dev *dev;
1423 struct pci_bus *child_bus;
1425 list_for_each_entry(dev, &bus->devices, bus_list) {
1428 for (i = 0; i < PCI_NUM_RESOURCES; i++) {
1429 struct resource *r = &dev->resource[i];
1431 if (r->parent || !r->start || !r->flags)
1434 pr_debug("PCI: Claiming %s: "
1435 "Resource %d: %016llx..%016llx [%x]\n",
1437 (unsigned long long)r->start,
1438 (unsigned long long)r->end,
1439 (unsigned int)r->flags);
1441 pci_claim_resource(dev, i);
1445 list_for_each_entry(child_bus, &bus->children, node)
1446 pcibios_claim_one_bus(child_bus);
1450 /* pcibios_finish_adding_to_bus
1452 * This is to be called by the hotplug code after devices have been
1453 * added to a bus, this include calling it for a PHB that is just
1456 void pcibios_finish_adding_to_bus(struct pci_bus *bus)
1458 pr_debug("PCI: Finishing adding to hotplug bus %04x:%02x\n",
1459 pci_domain_nr(bus), bus->number);
1461 /* Allocate bus and devices resources */
1462 pcibios_allocate_bus_resources(bus);
1463 pcibios_claim_one_bus(bus);
1466 eeh_add_device_tree_late(bus);
1468 /* Add new devices to global lists. Register in proc, sysfs. */
1469 pci_bus_add_devices(bus);
1471 /* sysfs files should only be added after devices are added */
1472 eeh_add_sysfs_files(bus);
1474 EXPORT_SYMBOL_GPL(pcibios_finish_adding_to_bus);
1476 int pcibios_enable_device(struct pci_dev *dev, int mask)
1478 if (ppc_md.pcibios_enable_device_hook)
1479 if (ppc_md.pcibios_enable_device_hook(dev))
1482 /* avoid pcie irq fix up impact on cardbus */
1483 if (dev->hdr_type != PCI_HEADER_TYPE_CARDBUS)
1484 pcibios_setup_device(dev);
1486 return pci_enable_resources(dev, mask);
1489 resource_size_t pcibios_io_space_offset(struct pci_controller *hose)
1491 return (unsigned long) hose->io_base_virt - _IO_BASE;
1494 static void pcibios_setup_phb_resources(struct pci_controller *hose,
1495 struct list_head *resources)
1497 struct resource *res;
1498 resource_size_t offset;
1501 /* Hookup PHB IO resource */
1502 res = &hose->io_resource;
1505 printk(KERN_WARNING "PCI: I/O resource not set for host"
1506 " bridge %s (domain %d)\n",
1507 hose->dn->full_name, hose->global_number);
1509 offset = pcibios_io_space_offset(hose);
1511 pr_debug("PCI: PHB IO resource = %08llx-%08llx [%lx] off 0x%08llx\n",
1512 (unsigned long long)res->start,
1513 (unsigned long long)res->end,
1514 (unsigned long)res->flags,
1515 (unsigned long long)offset);
1516 pci_add_resource_offset(resources, res, offset);
1519 /* Hookup PHB Memory resources */
1520 for (i = 0; i < 3; ++i) {
1521 res = &hose->mem_resources[i];
1523 printk(KERN_ERR "PCI: Memory resource 0 not set for "
1524 "host bridge %s (domain %d)\n",
1525 hose->dn->full_name, hose->global_number);
1528 offset = hose->mem_offset[i];
1531 pr_debug("PCI: PHB MEM resource %d = %08llx-%08llx [%lx] off 0x%08llx\n", i,
1532 (unsigned long long)res->start,
1533 (unsigned long long)res->end,
1534 (unsigned long)res->flags,
1535 (unsigned long long)offset);
1537 pci_add_resource_offset(resources, res, offset);
1542 * Null PCI config access functions, for the case when we can't
1545 #define NULL_PCI_OP(rw, size, type) \
1547 null_##rw##_config_##size(struct pci_dev *dev, int offset, type val) \
1549 return PCIBIOS_DEVICE_NOT_FOUND; \
1553 null_read_config(struct pci_bus *bus, unsigned int devfn, int offset,
1556 return PCIBIOS_DEVICE_NOT_FOUND;
1560 null_write_config(struct pci_bus *bus, unsigned int devfn, int offset,
1563 return PCIBIOS_DEVICE_NOT_FOUND;
1566 static struct pci_ops null_pci_ops =
1568 .read = null_read_config,
1569 .write = null_write_config,
1573 * These functions are used early on before PCI scanning is done
1574 * and all of the pci_dev and pci_bus structures have been created.
1576 static struct pci_bus *
1577 fake_pci_bus(struct pci_controller *hose, int busnr)
1579 static struct pci_bus bus;
1582 printk(KERN_ERR "Can't find hose for PCI bus %d!\n", busnr);
1586 bus.ops = hose? hose->ops: &null_pci_ops;
1590 #define EARLY_PCI_OP(rw, size, type) \
1591 int early_##rw##_config_##size(struct pci_controller *hose, int bus, \
1592 int devfn, int offset, type value) \
1594 return pci_bus_##rw##_config_##size(fake_pci_bus(hose, bus), \
1595 devfn, offset, value); \
1598 EARLY_PCI_OP(read, byte, u8 *)
1599 EARLY_PCI_OP(read, word, u16 *)
1600 EARLY_PCI_OP(read, dword, u32 *)
1601 EARLY_PCI_OP(write, byte, u8)
1602 EARLY_PCI_OP(write, word, u16)
1603 EARLY_PCI_OP(write, dword, u32)
1605 extern int pci_bus_find_capability (struct pci_bus *bus, unsigned int devfn, int cap);
1606 int early_find_capability(struct pci_controller *hose, int bus, int devfn,
1609 return pci_bus_find_capability(fake_pci_bus(hose, bus), devfn, cap);
1612 struct device_node *pcibios_get_phb_of_node(struct pci_bus *bus)
1614 struct pci_controller *hose = bus->sysdata;
1616 return of_node_get(hose->dn);
1620 * pci_scan_phb - Given a pci_controller, setup and scan the PCI bus
1621 * @hose: Pointer to the PCI host controller instance structure
1623 void pcibios_scan_phb(struct pci_controller *hose)
1625 LIST_HEAD(resources);
1626 struct pci_bus *bus;
1627 struct device_node *node = hose->dn;
1630 pr_debug("PCI: Scanning PHB %s\n", of_node_full_name(node));
1632 /* Get some IO space for the new PHB */
1633 pcibios_setup_phb_io_space(hose);
1635 /* Wire up PHB bus resources */
1636 pcibios_setup_phb_resources(hose, &resources);
1638 hose->busn.start = hose->first_busno;
1639 hose->busn.end = hose->last_busno;
1640 hose->busn.flags = IORESOURCE_BUS;
1641 pci_add_resource(&resources, &hose->busn);
1643 /* Create an empty bus for the toplevel */
1644 bus = pci_create_root_bus(hose->parent, hose->first_busno,
1645 hose->ops, hose, &resources);
1647 pr_err("Failed to create bus for PCI domain %04x\n",
1648 hose->global_number);
1649 pci_free_resource_list(&resources);
1654 /* Get probe mode and perform scan */
1655 mode = PCI_PROBE_NORMAL;
1656 if (node && ppc_md.pci_probe_mode)
1657 mode = ppc_md.pci_probe_mode(bus);
1658 pr_debug(" probe mode: %d\n", mode);
1659 if (mode == PCI_PROBE_DEVTREE)
1660 of_scan_bus(node, bus);
1662 if (mode == PCI_PROBE_NORMAL) {
1663 pci_bus_update_busn_res_end(bus, 255);
1664 hose->last_busno = pci_scan_child_bus(bus);
1665 pci_bus_update_busn_res_end(bus, hose->last_busno);
1668 /* Platform gets a chance to do some global fixups before
1669 * we proceed to resource allocation
1671 if (ppc_md.pcibios_fixup_phb)
1672 ppc_md.pcibios_fixup_phb(hose);
1674 /* Configure PCI Express settings */
1675 if (bus && !pci_has_flag(PCI_PROBE_ONLY)) {
1676 struct pci_bus *child;
1677 list_for_each_entry(child, &bus->children, node) {
1678 struct pci_dev *self = child->self;
1681 pcie_bus_configure_settings(child, self->pcie_mpss);
1686 static void fixup_hide_host_resource_fsl(struct pci_dev *dev)
1688 int i, class = dev->class >> 8;
1689 /* When configured as agent, programing interface = 1 */
1690 int prog_if = dev->class & 0xf;
1692 if ((class == PCI_CLASS_PROCESSOR_POWERPC ||
1693 class == PCI_CLASS_BRIDGE_OTHER) &&
1694 (dev->hdr_type == PCI_HEADER_TYPE_NORMAL) &&
1696 (dev->bus->parent == NULL)) {
1697 for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
1698 dev->resource[i].start = 0;
1699 dev->resource[i].end = 0;
1700 dev->resource[i].flags = 0;
1704 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_MOTOROLA, PCI_ANY_ID, fixup_hide_host_resource_fsl);
1705 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_FREESCALE, PCI_ANY_ID, fixup_hide_host_resource_fsl);
1707 static void fixup_vga(struct pci_dev *pdev)
1711 pci_read_config_word(pdev, PCI_COMMAND, &cmd);
1712 if ((cmd & (PCI_COMMAND_IO | PCI_COMMAND_MEMORY)) || !vga_default_device())
1713 vga_set_default_device(pdev);
1716 DECLARE_PCI_FIXUP_CLASS_FINAL(PCI_ANY_ID, PCI_ANY_ID,
1717 PCI_CLASS_DISPLAY_VGA, 8, fixup_vga);