2 * Port for PPC64 David Engebretsen, IBM Corp.
3 * Contains common pci routines for ppc64 platform, pSeries and iSeries brands.
5 * Copyright (C) 2003 Anton Blanchard <anton@au.ibm.com>, IBM
6 * Rework, based on alpha PCI code.
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License
10 * as published by the Free Software Foundation; either version
11 * 2 of the License, or (at your option) any later version.
16 #include <linux/kernel.h>
17 #include <linux/pci.h>
18 #include <linux/string.h>
19 #include <linux/init.h>
20 #include <linux/bootmem.h>
22 #include <linux/list.h>
23 #include <linux/syscalls.h>
24 #include <linux/irq.h>
26 #include <asm/processor.h>
29 #include <asm/pci-bridge.h>
30 #include <asm/byteorder.h>
31 #include <asm/machdep.h>
32 #include <asm/ppc-pci.h>
33 #include <asm/firmware.h>
37 #define DBG(fmt...) printk(fmt)
42 unsigned long pci_probe_only = 1;
43 int pci_assign_all_buses = 0;
45 static void fixup_resource(struct resource *res, struct pci_dev *dev);
46 static void do_bus_setup(struct pci_bus *bus);
47 static void phbs_remap_io(void);
49 /* pci_io_base -- the base address from which io bars are offsets.
50 * This is the lowest I/O base address (so bar values are always positive),
51 * and it *must* be the start of ISA space if an ISA bus exists because
52 * ISA drivers use hard coded offsets. If no ISA bus exists a dummy
53 * page is mapped and isa_io_limit prevents access to it.
55 unsigned long isa_io_base; /* NULL if no ISA bus */
56 EXPORT_SYMBOL(isa_io_base);
57 unsigned long pci_io_base;
58 EXPORT_SYMBOL(pci_io_base);
60 void iSeries_pcibios_init(void);
64 static struct dma_mapping_ops *pci_dma_ops;
66 int global_phb_number; /* Global phb counter */
68 /* Cached ISA bridge dev. */
69 struct pci_dev *ppc64_isabridge_dev = NULL;
70 EXPORT_SYMBOL_GPL(ppc64_isabridge_dev);
72 void set_pci_dma_ops(struct dma_mapping_ops *dma_ops)
74 pci_dma_ops = dma_ops;
77 struct dma_mapping_ops *get_pci_dma_ops(void)
81 EXPORT_SYMBOL(get_pci_dma_ops);
83 static void fixup_broken_pcnet32(struct pci_dev* dev)
85 if ((dev->class>>8 == PCI_CLASS_NETWORK_ETHERNET)) {
86 dev->vendor = PCI_VENDOR_ID_AMD;
87 pci_write_config_word(dev, PCI_VENDOR_ID, PCI_VENDOR_ID_AMD);
90 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_TRIDENT, PCI_ANY_ID, fixup_broken_pcnet32);
92 void pcibios_resource_to_bus(struct pci_dev *dev, struct pci_bus_region *region,
95 unsigned long offset = 0;
96 struct pci_controller *hose = pci_bus_to_host(dev->bus);
101 if (res->flags & IORESOURCE_IO)
102 offset = (unsigned long)hose->io_base_virt - pci_io_base;
104 if (res->flags & IORESOURCE_MEM)
105 offset = hose->pci_mem_offset;
107 region->start = res->start - offset;
108 region->end = res->end - offset;
111 void pcibios_bus_to_resource(struct pci_dev *dev, struct resource *res,
112 struct pci_bus_region *region)
114 unsigned long offset = 0;
115 struct pci_controller *hose = pci_bus_to_host(dev->bus);
120 if (res->flags & IORESOURCE_IO)
121 offset = (unsigned long)hose->io_base_virt - pci_io_base;
123 if (res->flags & IORESOURCE_MEM)
124 offset = hose->pci_mem_offset;
126 res->start = region->start + offset;
127 res->end = region->end + offset;
130 #ifdef CONFIG_HOTPLUG
131 EXPORT_SYMBOL(pcibios_resource_to_bus);
132 EXPORT_SYMBOL(pcibios_bus_to_resource);
136 * We need to avoid collisions with `mirrored' VGA ports
137 * and other strange ISA hardware, so we always want the
138 * addresses to be allocated in the 0x000-0x0ff region
141 * Why? Because some silly external IO cards only decode
142 * the low 10 bits of the IO address. The 0x00-0xff region
143 * is reserved for motherboard devices that decode all 16
144 * bits, so it's ok to allocate at, say, 0x2800-0x28ff,
145 * but we want to try to avoid allocating at 0x2900-0x2bff
146 * which might have be mirrored at 0x0100-0x03ff..
148 void pcibios_align_resource(void *data, struct resource *res,
149 resource_size_t size, resource_size_t align)
151 struct pci_dev *dev = data;
152 struct pci_controller *hose = pci_bus_to_host(dev->bus);
153 resource_size_t start = res->start;
154 unsigned long alignto;
156 if (res->flags & IORESOURCE_IO) {
157 unsigned long offset = (unsigned long)hose->io_base_virt -
159 /* Make sure we start at our min on all hoses */
160 if (start - offset < PCIBIOS_MIN_IO)
161 start = PCIBIOS_MIN_IO + offset;
164 * Put everything into 0x00-0xff region modulo 0x400
167 start = (start + 0x3ff) & ~0x3ff;
169 } else if (res->flags & IORESOURCE_MEM) {
170 /* Make sure we start at our min on all hoses */
171 if (start - hose->pci_mem_offset < PCIBIOS_MIN_MEM)
172 start = PCIBIOS_MIN_MEM + hose->pci_mem_offset;
174 /* Align to multiple of size of minimum base. */
175 alignto = max(0x1000UL, align);
176 start = ALIGN(start, alignto);
182 static DEFINE_SPINLOCK(hose_spinlock);
185 * pci_controller(phb) initialized common variables.
187 static void __devinit pci_setup_pci_controller(struct pci_controller *hose)
189 memset(hose, 0, sizeof(struct pci_controller));
191 spin_lock(&hose_spinlock);
192 hose->global_number = global_phb_number++;
193 list_add_tail(&hose->list_node, &hose_list);
194 spin_unlock(&hose_spinlock);
197 struct pci_controller * pcibios_alloc_controller(struct device_node *dev)
199 struct pci_controller *phb;
202 phb = kmalloc(sizeof(struct pci_controller), GFP_KERNEL);
204 phb = alloc_bootmem(sizeof (struct pci_controller));
207 pci_setup_pci_controller(phb);
208 phb->arch_data = dev;
209 phb->is_dynamic = mem_init_done;
211 int nid = of_node_to_nid(dev);
213 if (nid < 0 || !node_online(nid))
216 PHB_SET_NODE(phb, nid);
221 void pcibios_free_controller(struct pci_controller *phb)
223 spin_lock(&hose_spinlock);
224 list_del(&phb->list_node);
225 spin_unlock(&hose_spinlock);
231 void __devinit pcibios_claim_one_bus(struct pci_bus *b)
234 struct pci_bus *child_bus;
236 list_for_each_entry(dev, &b->devices, bus_list) {
239 for (i = 0; i < PCI_NUM_RESOURCES; i++) {
240 struct resource *r = &dev->resource[i];
242 if (r->parent || !r->start || !r->flags)
244 pci_claim_resource(dev, i);
248 list_for_each_entry(child_bus, &b->children, node)
249 pcibios_claim_one_bus(child_bus);
251 #ifdef CONFIG_HOTPLUG
252 EXPORT_SYMBOL_GPL(pcibios_claim_one_bus);
255 static void __init pcibios_claim_of_setup(void)
259 if (firmware_has_feature(FW_FEATURE_ISERIES))
262 list_for_each_entry(b, &pci_root_buses, node)
263 pcibios_claim_one_bus(b);
266 static u32 get_int_prop(struct device_node *np, const char *name, u32 def)
271 prop = of_get_property(np, name, &len);
272 if (prop && len >= 4)
277 static unsigned int pci_parse_of_flags(u32 addr0)
279 unsigned int flags = 0;
281 if (addr0 & 0x02000000) {
282 flags = IORESOURCE_MEM | PCI_BASE_ADDRESS_SPACE_MEMORY;
283 flags |= (addr0 >> 22) & PCI_BASE_ADDRESS_MEM_TYPE_64;
284 flags |= (addr0 >> 28) & PCI_BASE_ADDRESS_MEM_TYPE_1M;
285 if (addr0 & 0x40000000)
286 flags |= IORESOURCE_PREFETCH
287 | PCI_BASE_ADDRESS_MEM_PREFETCH;
288 } else if (addr0 & 0x01000000)
289 flags = IORESOURCE_IO | PCI_BASE_ADDRESS_SPACE_IO;
293 #define GET_64BIT(prop, i) ((((u64) (prop)[(i)]) << 32) | (prop)[(i)+1])
295 static void pci_parse_of_addrs(struct device_node *node, struct pci_dev *dev)
299 struct resource *res;
304 addrs = of_get_property(node, "assigned-addresses", &proplen);
307 DBG(" parse addresses (%d bytes) @ %p\n", proplen, addrs);
308 for (; proplen >= 20; proplen -= 20, addrs += 5) {
309 flags = pci_parse_of_flags(addrs[0]);
312 base = GET_64BIT(addrs, 1);
313 size = GET_64BIT(addrs, 3);
317 DBG(" base: %llx, size: %llx, i: %x\n",
318 (unsigned long long)base, (unsigned long long)size, i);
320 if (PCI_BASE_ADDRESS_0 <= i && i <= PCI_BASE_ADDRESS_5) {
321 res = &dev->resource[(i - PCI_BASE_ADDRESS_0) >> 2];
322 } else if (i == dev->rom_base_reg) {
323 res = &dev->resource[PCI_ROM_RESOURCE];
324 flags |= IORESOURCE_READONLY | IORESOURCE_CACHEABLE;
326 printk(KERN_ERR "PCI: bad cfg reg num 0x%x\n", i);
330 res->end = base + size - 1;
332 res->name = pci_name(dev);
333 fixup_resource(res, dev);
337 struct pci_dev *of_create_pci_dev(struct device_node *node,
338 struct pci_bus *bus, int devfn)
343 dev = kzalloc(sizeof(struct pci_dev), GFP_KERNEL);
346 type = of_get_property(node, "device_type", NULL);
350 DBG(" create device, devfn: %x, type: %s\n", devfn, type);
354 dev->dev.parent = bus->bridge;
355 dev->dev.bus = &pci_bus_type;
357 dev->multifunction = 0; /* maybe a lie? */
359 dev->vendor = get_int_prop(node, "vendor-id", 0xffff);
360 dev->device = get_int_prop(node, "device-id", 0xffff);
361 dev->subsystem_vendor = get_int_prop(node, "subsystem-vendor-id", 0);
362 dev->subsystem_device = get_int_prop(node, "subsystem-id", 0);
364 dev->cfg_size = pci_cfg_space_size(dev);
366 sprintf(pci_name(dev), "%04x:%02x:%02x.%d", pci_domain_nr(bus),
367 dev->bus->number, PCI_SLOT(devfn), PCI_FUNC(devfn));
368 dev->class = get_int_prop(node, "class-code", 0);
370 DBG(" class: 0x%x\n", dev->class);
372 dev->current_state = 4; /* unknown power state */
373 dev->error_state = pci_channel_io_normal;
375 if (!strcmp(type, "pci") || !strcmp(type, "pciex")) {
376 /* a PCI-PCI bridge */
377 dev->hdr_type = PCI_HEADER_TYPE_BRIDGE;
378 dev->rom_base_reg = PCI_ROM_ADDRESS1;
379 } else if (!strcmp(type, "cardbus")) {
380 dev->hdr_type = PCI_HEADER_TYPE_CARDBUS;
382 dev->hdr_type = PCI_HEADER_TYPE_NORMAL;
383 dev->rom_base_reg = PCI_ROM_ADDRESS;
384 /* Maybe do a default OF mapping here */
388 pci_parse_of_addrs(node, dev);
390 DBG(" adding to system ...\n");
392 pci_device_add(dev, bus);
396 EXPORT_SYMBOL(of_create_pci_dev);
398 void __devinit of_scan_bus(struct device_node *node,
401 struct device_node *child = NULL;
406 DBG("of_scan_bus(%s) bus no %d... \n", node->full_name, bus->number);
408 while ((child = of_get_next_child(node, child)) != NULL) {
409 DBG(" * %s\n", child->full_name);
410 reg = of_get_property(child, "reg", ®len);
411 if (reg == NULL || reglen < 20)
413 devfn = (reg[0] >> 8) & 0xff;
415 /* create a new pci_dev for this device */
416 dev = of_create_pci_dev(child, bus, devfn);
419 DBG("dev header type: %x\n", dev->hdr_type);
421 if (dev->hdr_type == PCI_HEADER_TYPE_BRIDGE ||
422 dev->hdr_type == PCI_HEADER_TYPE_CARDBUS)
423 of_scan_pci_bridge(child, dev);
428 EXPORT_SYMBOL(of_scan_bus);
430 void __devinit of_scan_pci_bridge(struct device_node *node,
434 const u32 *busrange, *ranges;
436 struct resource *res;
440 DBG("of_scan_pci_bridge(%s)\n", node->full_name);
442 /* parse bus-range property */
443 busrange = of_get_property(node, "bus-range", &len);
444 if (busrange == NULL || len != 8) {
445 printk(KERN_DEBUG "Can't get bus-range for PCI-PCI bridge %s\n",
449 ranges = of_get_property(node, "ranges", &len);
450 if (ranges == NULL) {
451 printk(KERN_DEBUG "Can't get ranges for PCI-PCI bridge %s\n",
456 bus = pci_add_new_bus(dev->bus, dev, busrange[0]);
458 printk(KERN_ERR "Failed to create pci bus for %s\n",
463 bus->primary = dev->bus->number;
464 bus->subordinate = busrange[1];
468 /* parse ranges property */
469 /* PCI #address-cells == 3 and #size-cells == 2 always */
470 res = &dev->resource[PCI_BRIDGE_RESOURCES];
471 for (i = 0; i < PCI_NUM_RESOURCES - PCI_BRIDGE_RESOURCES; ++i) {
473 bus->resource[i] = res;
477 for (; len >= 32; len -= 32, ranges += 8) {
478 flags = pci_parse_of_flags(ranges[0]);
479 size = GET_64BIT(ranges, 6);
480 if (flags == 0 || size == 0)
482 if (flags & IORESOURCE_IO) {
483 res = bus->resource[0];
485 printk(KERN_ERR "PCI: ignoring extra I/O range"
486 " for bridge %s\n", node->full_name);
490 if (i >= PCI_NUM_RESOURCES - PCI_BRIDGE_RESOURCES) {
491 printk(KERN_ERR "PCI: too many memory ranges"
492 " for bridge %s\n", node->full_name);
495 res = bus->resource[i];
498 res->start = GET_64BIT(ranges, 1);
499 res->end = res->start + size - 1;
501 fixup_resource(res, dev);
503 sprintf(bus->name, "PCI Bus %04x:%02x", pci_domain_nr(bus),
505 DBG(" bus name: %s\n", bus->name);
507 mode = PCI_PROBE_NORMAL;
508 if (ppc_md.pci_probe_mode)
509 mode = ppc_md.pci_probe_mode(bus);
510 DBG(" probe mode: %d\n", mode);
512 if (mode == PCI_PROBE_DEVTREE)
513 of_scan_bus(node, bus);
514 else if (mode == PCI_PROBE_NORMAL)
515 pci_scan_child_bus(bus);
517 EXPORT_SYMBOL(of_scan_pci_bridge);
519 void __devinit scan_phb(struct pci_controller *hose)
522 struct device_node *node = hose->arch_data;
524 struct resource *res;
526 DBG("Scanning PHB %s\n", node ? node->full_name : "<NO NAME>");
528 bus = pci_create_bus(hose->parent, hose->first_busno, hose->ops, node);
530 printk(KERN_ERR "Failed to create bus for PCI domain %04x\n",
531 hose->global_number);
534 bus->secondary = hose->first_busno;
537 bus->resource[0] = res = &hose->io_resource;
538 if (res->flags && request_resource(&ioport_resource, res))
539 printk(KERN_ERR "Failed to request PCI IO region "
540 "on PCI domain %04x\n", hose->global_number);
542 for (i = 0; i < 3; ++i) {
543 res = &hose->mem_resources[i];
544 bus->resource[i+1] = res;
545 if (res->flags && request_resource(&iomem_resource, res))
546 printk(KERN_ERR "Failed to request PCI memory region "
547 "on PCI domain %04x\n", hose->global_number);
550 mode = PCI_PROBE_NORMAL;
552 if (node && ppc_md.pci_probe_mode)
553 mode = ppc_md.pci_probe_mode(bus);
554 DBG(" probe mode: %d\n", mode);
555 if (mode == PCI_PROBE_DEVTREE) {
556 bus->subordinate = hose->last_busno;
557 of_scan_bus(node, bus);
560 if (mode == PCI_PROBE_NORMAL)
561 hose->last_busno = bus->subordinate = pci_scan_child_bus(bus);
564 static int __init pcibios_init(void)
566 struct pci_controller *hose, *tmp;
568 /* For now, override phys_mem_access_prot. If we need it,
569 * later, we may move that initialization to each ppc_md
571 ppc_md.phys_mem_access_prot = pci_phys_mem_access_prot;
573 if (firmware_has_feature(FW_FEATURE_ISERIES))
574 iSeries_pcibios_init();
576 printk(KERN_DEBUG "PCI: Probing PCI hardware\n");
578 /* Scan all of the recorded PCI controllers. */
579 list_for_each_entry_safe(hose, tmp, &hose_list, list_node) {
581 pci_bus_add_devices(hose->bus);
584 if (!firmware_has_feature(FW_FEATURE_ISERIES)) {
586 pcibios_claim_of_setup();
588 /* FIXME: `else' will be removed when
589 pci_assign_unassigned_resources() is able to work
590 correctly with [partially] allocated PCI tree. */
591 pci_assign_unassigned_resources();
594 /* Call machine dependent final fixup */
595 if (ppc_md.pcibios_fixup)
596 ppc_md.pcibios_fixup();
598 /* Cache the location of the ISA bridge (if we have one) */
599 ppc64_isabridge_dev = pci_get_class(PCI_CLASS_BRIDGE_ISA << 8, NULL);
600 if (ppc64_isabridge_dev != NULL)
601 printk(KERN_DEBUG "ISA bridge at %s\n", pci_name(ppc64_isabridge_dev));
603 if (!firmware_has_feature(FW_FEATURE_ISERIES))
604 /* map in PCI I/O space */
607 printk(KERN_DEBUG "PCI: Probing PCI hardware done\n");
612 subsys_initcall(pcibios_init);
614 char __init *pcibios_setup(char *str)
619 int pcibios_enable_device(struct pci_dev *dev, int mask)
624 pci_read_config_word(dev, PCI_COMMAND, &cmd);
627 for (i = 0; i < PCI_NUM_RESOURCES; i++) {
628 struct resource *res = &dev->resource[i];
630 /* Only set up the requested stuff */
631 if (!(mask & (1<<i)))
634 if (res->flags & IORESOURCE_IO)
635 cmd |= PCI_COMMAND_IO;
636 if (res->flags & IORESOURCE_MEM)
637 cmd |= PCI_COMMAND_MEMORY;
641 printk(KERN_DEBUG "PCI: Enabling device: (%s), cmd %x\n",
643 /* Enable the appropriate bits in the PCI command register. */
644 pci_write_config_word(dev, PCI_COMMAND, cmd);
650 * Return the domain number for this bus.
652 int pci_domain_nr(struct pci_bus *bus)
654 if (firmware_has_feature(FW_FEATURE_ISERIES))
657 struct pci_controller *hose = pci_bus_to_host(bus);
659 return hose->global_number;
663 EXPORT_SYMBOL(pci_domain_nr);
665 /* Decide whether to display the domain number in /proc */
666 int pci_proc_domain(struct pci_bus *bus)
668 if (firmware_has_feature(FW_FEATURE_ISERIES))
671 struct pci_controller *hose = pci_bus_to_host(bus);
677 * Platform support for /proc/bus/pci/X/Y mmap()s,
678 * modelled on the sparc64 implementation by Dave Miller.
683 * Adjust vm_pgoff of VMA such that it is the physical page offset
684 * corresponding to the 32-bit pci bus offset for DEV requested by the user.
686 * Basically, the user finds the base address for his device which he wishes
687 * to mmap. They read the 32-bit value from the config space base register,
688 * add whatever PAGE_SIZE multiple offset they wish, and feed this into the
689 * offset parameter of mmap on /proc/bus/pci/XXX for that device.
691 * Returns negative error code on failure, zero on success.
693 static struct resource *__pci_mmap_make_offset(struct pci_dev *dev,
694 resource_size_t *offset,
695 enum pci_mmap_state mmap_state)
697 struct pci_controller *hose = pci_bus_to_host(dev->bus);
698 unsigned long io_offset = 0;
702 return NULL; /* should never happen */
704 /* If memory, add on the PCI bridge address offset */
705 if (mmap_state == pci_mmap_mem) {
706 #if 0 /* See comment in pci_resource_to_user() for why this is disabled */
707 *offset += hose->pci_mem_offset;
709 res_bit = IORESOURCE_MEM;
711 io_offset = (unsigned long)hose->io_base_virt - pci_io_base;
712 *offset += io_offset;
713 res_bit = IORESOURCE_IO;
717 * Check that the offset requested corresponds to one of the
718 * resources of the device.
720 for (i = 0; i <= PCI_ROM_RESOURCE; i++) {
721 struct resource *rp = &dev->resource[i];
722 int flags = rp->flags;
724 /* treat ROM as memory (should be already) */
725 if (i == PCI_ROM_RESOURCE)
726 flags |= IORESOURCE_MEM;
728 /* Active and same type? */
729 if ((flags & res_bit) == 0)
732 /* In the range of this resource? */
733 if (*offset < (rp->start & PAGE_MASK) || *offset > rp->end)
736 /* found it! construct the final physical address */
737 if (mmap_state == pci_mmap_io)
738 *offset += hose->io_base_phys - io_offset;
746 * Set vm_page_prot of VMA, as appropriate for this architecture, for a pci
749 static pgprot_t __pci_mmap_set_pgprot(struct pci_dev *dev, struct resource *rp,
751 enum pci_mmap_state mmap_state,
754 unsigned long prot = pgprot_val(protection);
756 /* Write combine is always 0 on non-memory space mappings. On
757 * memory space, if the user didn't pass 1, we check for a
758 * "prefetchable" resource. This is a bit hackish, but we use
759 * this to workaround the inability of /sysfs to provide a write
762 if (mmap_state != pci_mmap_mem)
764 else if (write_combine == 0) {
765 if (rp->flags & IORESOURCE_PREFETCH)
769 /* XXX would be nice to have a way to ask for write-through */
770 prot |= _PAGE_NO_CACHE;
772 prot &= ~_PAGE_GUARDED;
774 prot |= _PAGE_GUARDED;
776 return __pgprot(prot);
780 * This one is used by /dev/mem and fbdev who have no clue about the
781 * PCI device, it tries to find the PCI device first and calls the
784 pgprot_t pci_phys_mem_access_prot(struct file *file,
789 struct pci_dev *pdev = NULL;
790 struct resource *found = NULL;
791 unsigned long prot = pgprot_val(protection);
792 unsigned long offset = pfn << PAGE_SHIFT;
795 if (page_is_ram(pfn))
796 return __pgprot(prot);
798 prot |= _PAGE_NO_CACHE | _PAGE_GUARDED;
800 for_each_pci_dev(pdev) {
801 for (i = 0; i <= PCI_ROM_RESOURCE; i++) {
802 struct resource *rp = &pdev->resource[i];
803 int flags = rp->flags;
805 /* Active and same type? */
806 if ((flags & IORESOURCE_MEM) == 0)
808 /* In the range of this resource? */
809 if (offset < (rp->start & PAGE_MASK) ||
819 if (found->flags & IORESOURCE_PREFETCH)
820 prot &= ~_PAGE_GUARDED;
824 DBG("non-PCI map for %lx, prot: %lx\n", offset, prot);
826 return __pgprot(prot);
831 * Perform the actual remap of the pages for a PCI device mapping, as
832 * appropriate for this architecture. The region in the process to map
833 * is described by vm_start and vm_end members of VMA, the base physical
834 * address is found in vm_pgoff.
835 * The pci device structure is provided so that architectures may make mapping
836 * decisions on a per-device or per-bus basis.
838 * Returns a negative error code on failure, zero on success.
840 int pci_mmap_page_range(struct pci_dev *dev, struct vm_area_struct *vma,
841 enum pci_mmap_state mmap_state, int write_combine)
843 resource_size_t offset = vma->vm_pgoff << PAGE_SHIFT;
847 rp = __pci_mmap_make_offset(dev, &offset, mmap_state);
851 vma->vm_pgoff = offset >> PAGE_SHIFT;
852 vma->vm_page_prot = __pci_mmap_set_pgprot(dev, rp,
854 mmap_state, write_combine);
856 ret = remap_pfn_range(vma, vma->vm_start, vma->vm_pgoff,
857 vma->vm_end - vma->vm_start, vma->vm_page_prot);
862 static ssize_t pci_show_devspec(struct device *dev,
863 struct device_attribute *attr, char *buf)
865 struct pci_dev *pdev;
866 struct device_node *np;
868 pdev = to_pci_dev (dev);
869 np = pci_device_to_OF_node(pdev);
870 if (np == NULL || np->full_name == NULL)
872 return sprintf(buf, "%s", np->full_name);
874 static DEVICE_ATTR(devspec, S_IRUGO, pci_show_devspec, NULL);
876 void pcibios_add_platform_entries(struct pci_dev *pdev)
878 device_create_file(&pdev->dev, &dev_attr_devspec);
881 #define ISA_SPACE_MASK 0x1
882 #define ISA_SPACE_IO 0x1
884 static void __devinit pci_process_ISA_OF_ranges(struct device_node *isa_node,
885 unsigned long phb_io_base_phys,
886 void __iomem * phb_io_base_virt)
888 /* Remove these asap */
902 struct isa_address isa_addr;
903 struct pci_address pci_addr;
907 const struct isa_range *range;
908 unsigned long pci_addr;
909 unsigned int isa_addr;
913 range = of_get_property(isa_node, "ranges", &rlen);
914 if (range == NULL || (rlen < sizeof(struct isa_range))) {
915 printk(KERN_ERR "no ISA ranges or unexpected isa range size,"
917 __ioremap_explicit(phb_io_base_phys,
918 (unsigned long)phb_io_base_virt,
919 0x10000, _PAGE_NO_CACHE | _PAGE_GUARDED);
923 /* From "ISA Binding to 1275"
924 * The ranges property is laid out as an array of elements,
925 * each of which comprises:
926 * cells 0 - 1: an ISA address
927 * cells 2 - 4: a PCI address
928 * (size depending on dev->n_addr_cells)
929 * cell 5: the size of the range
931 if ((range->isa_addr.a_hi && ISA_SPACE_MASK) == ISA_SPACE_IO) {
932 isa_addr = range->isa_addr.a_lo;
933 pci_addr = (unsigned long) range->pci_addr.a_mid << 32 |
934 range->pci_addr.a_lo;
936 /* Assume these are both zero */
937 if ((pci_addr != 0) || (isa_addr != 0)) {
938 printk(KERN_ERR "unexpected isa to pci mapping: %s\n",
943 size = PAGE_ALIGN(range->size);
945 __ioremap_explicit(phb_io_base_phys,
946 (unsigned long) phb_io_base_virt,
947 size, _PAGE_NO_CACHE | _PAGE_GUARDED);
951 void __devinit pci_process_bridge_OF_ranges(struct pci_controller *hose,
952 struct device_node *dev, int prim)
954 const unsigned int *ranges;
955 unsigned int pci_space;
959 struct resource *res;
960 int np, na = of_n_addr_cells(dev);
961 unsigned long pci_addr, cpu_phys_addr;
965 /* From "PCI Binding to 1275"
966 * The ranges property is laid out as an array of elements,
967 * each of which comprises:
968 * cells 0 - 2: a PCI address
969 * cells 3 or 3+4: a CPU physical address
970 * (size depending on dev->n_addr_cells)
971 * cells 4+5 or 5+6: the size of the range
973 ranges = of_get_property(dev, "ranges", &rlen);
976 hose->io_base_phys = 0;
977 while ((rlen -= np * sizeof(unsigned int)) >= 0) {
979 pci_space = ranges[0];
980 pci_addr = ((unsigned long)ranges[1] << 32) | ranges[2];
981 cpu_phys_addr = of_translate_address(dev, &ranges[3]);
982 size = ((unsigned long)ranges[na+3] << 32) | ranges[na+4];
987 /* Now consume following elements while they are contiguous */
988 while (rlen >= np * sizeof(unsigned int)) {
989 unsigned long addr, phys;
991 if (ranges[0] != pci_space)
993 addr = ((unsigned long)ranges[1] << 32) | ranges[2];
996 phys = (phys << 32) | ranges[4];
997 if (addr != pci_addr + size ||
998 phys != cpu_phys_addr + size)
1001 size += ((unsigned long)ranges[na+3] << 32)
1004 rlen -= np * sizeof(unsigned int);
1007 switch ((pci_space >> 24) & 0x3) {
1008 case 1: /* I/O space */
1009 hose->io_base_phys = cpu_phys_addr;
1010 hose->pci_io_size = size;
1012 res = &hose->io_resource;
1013 res->flags = IORESOURCE_IO;
1014 res->start = pci_addr;
1015 DBG("phb%d: IO 0x%lx -> 0x%lx\n", hose->global_number,
1016 res->start, res->start + size - 1);
1018 case 2: /* memory space */
1020 while (memno < 3 && hose->mem_resources[memno].flags)
1024 hose->pci_mem_offset = cpu_phys_addr - pci_addr;
1026 res = &hose->mem_resources[memno];
1027 res->flags = IORESOURCE_MEM;
1028 res->start = cpu_phys_addr;
1029 DBG("phb%d: MEM 0x%lx -> 0x%lx\n", hose->global_number,
1030 res->start, res->start + size - 1);
1035 res->name = dev->full_name;
1036 res->end = res->start + size - 1;
1038 res->sibling = NULL;
1044 void __init pci_setup_phb_io(struct pci_controller *hose, int primary)
1046 unsigned long size = hose->pci_io_size;
1047 unsigned long io_virt_offset;
1048 struct resource *res;
1049 struct device_node *isa_dn;
1051 hose->io_base_virt = reserve_phb_iospace(size);
1052 DBG("phb%d io_base_phys 0x%lx io_base_virt 0x%lx\n",
1053 hose->global_number, hose->io_base_phys,
1054 (unsigned long) hose->io_base_virt);
1057 pci_io_base = (unsigned long)hose->io_base_virt;
1058 isa_dn = of_find_node_by_type(NULL, "isa");
1060 isa_io_base = pci_io_base;
1061 pci_process_ISA_OF_ranges(isa_dn, hose->io_base_phys,
1062 hose->io_base_virt);
1063 of_node_put(isa_dn);
1067 io_virt_offset = (unsigned long)hose->io_base_virt - pci_io_base;
1068 res = &hose->io_resource;
1069 res->start += io_virt_offset;
1070 res->end += io_virt_offset;
1073 void __devinit pci_setup_phb_io_dynamic(struct pci_controller *hose,
1076 unsigned long size = hose->pci_io_size;
1077 unsigned long io_virt_offset;
1078 struct resource *res;
1080 hose->io_base_virt = __ioremap(hose->io_base_phys, size,
1081 _PAGE_NO_CACHE | _PAGE_GUARDED);
1082 DBG("phb%d io_base_phys 0x%lx io_base_virt 0x%lx\n",
1083 hose->global_number, hose->io_base_phys,
1084 (unsigned long) hose->io_base_virt);
1087 pci_io_base = (unsigned long)hose->io_base_virt;
1089 io_virt_offset = (unsigned long)hose->io_base_virt - pci_io_base;
1090 res = &hose->io_resource;
1091 res->start += io_virt_offset;
1092 res->end += io_virt_offset;
1096 static int get_bus_io_range(struct pci_bus *bus, unsigned long *start_phys,
1097 unsigned long *start_virt, unsigned long *size)
1099 struct pci_controller *hose = pci_bus_to_host(bus);
1100 struct pci_bus_region region;
1101 struct resource *res;
1104 res = bus->resource[0];
1105 pcibios_resource_to_bus(bus->self, ®ion, res);
1106 *start_phys = hose->io_base_phys + region.start;
1107 *start_virt = (unsigned long) hose->io_base_virt +
1109 if (region.end > region.start)
1110 *size = region.end - region.start + 1;
1112 printk("%s(): unexpected region 0x%lx->0x%lx\n",
1113 __FUNCTION__, region.start, region.end);
1119 res = &hose->io_resource;
1120 *start_phys = hose->io_base_phys;
1121 *start_virt = (unsigned long) hose->io_base_virt;
1122 if (res->end > res->start)
1123 *size = res->end - res->start + 1;
1125 printk("%s(): unexpected region 0x%lx->0x%lx\n",
1126 __FUNCTION__, res->start, res->end);
1134 int unmap_bus_range(struct pci_bus *bus)
1136 unsigned long start_phys;
1137 unsigned long start_virt;
1141 printk(KERN_ERR "%s() expected bus\n", __FUNCTION__);
1145 if (get_bus_io_range(bus, &start_phys, &start_virt, &size))
1147 if (__iounmap_explicit((void __iomem *) start_virt, size))
1152 EXPORT_SYMBOL(unmap_bus_range);
1154 int remap_bus_range(struct pci_bus *bus)
1156 unsigned long start_phys;
1157 unsigned long start_virt;
1161 printk(KERN_ERR "%s() expected bus\n", __FUNCTION__);
1166 if (get_bus_io_range(bus, &start_phys, &start_virt, &size))
1168 if (start_phys == 0)
1170 printk(KERN_DEBUG "mapping IO %lx -> %lx, size: %lx\n", start_phys, start_virt, size);
1171 if (__ioremap_explicit(start_phys, start_virt, size,
1172 _PAGE_NO_CACHE | _PAGE_GUARDED))
1177 EXPORT_SYMBOL(remap_bus_range);
1179 static void phbs_remap_io(void)
1181 struct pci_controller *hose, *tmp;
1183 list_for_each_entry_safe(hose, tmp, &hose_list, list_node)
1184 remap_bus_range(hose->bus);
1187 static void __devinit fixup_resource(struct resource *res, struct pci_dev *dev)
1189 struct pci_controller *hose = pci_bus_to_host(dev->bus);
1190 unsigned long offset;
1192 if (res->flags & IORESOURCE_IO) {
1193 offset = (unsigned long)hose->io_base_virt - pci_io_base;
1195 res->start += offset;
1197 } else if (res->flags & IORESOURCE_MEM) {
1198 res->start += hose->pci_mem_offset;
1199 res->end += hose->pci_mem_offset;
1203 void __devinit pcibios_fixup_device_resources(struct pci_dev *dev,
1204 struct pci_bus *bus)
1206 /* Update device resources. */
1209 for (i = 0; i < PCI_NUM_RESOURCES; i++)
1210 if (dev->resource[i].flags)
1211 fixup_resource(&dev->resource[i], dev);
1213 EXPORT_SYMBOL(pcibios_fixup_device_resources);
1215 void __devinit pcibios_setup_new_device(struct pci_dev *dev)
1217 struct dev_archdata *sd = &dev->dev.archdata;
1219 sd->of_node = pci_device_to_OF_node(dev);
1221 DBG("PCI device %s OF node: %s\n", pci_name(dev),
1222 sd->of_node ? sd->of_node->full_name : "<none>");
1224 sd->dma_ops = pci_dma_ops;
1226 sd->numa_node = pcibus_to_node(dev->bus);
1230 if (ppc_md.pci_dma_dev_setup)
1231 ppc_md.pci_dma_dev_setup(dev);
1233 EXPORT_SYMBOL(pcibios_setup_new_device);
1235 static void __devinit do_bus_setup(struct pci_bus *bus)
1237 struct pci_dev *dev;
1239 if (ppc_md.pci_dma_bus_setup)
1240 ppc_md.pci_dma_bus_setup(bus);
1242 list_for_each_entry(dev, &bus->devices, bus_list)
1243 pcibios_setup_new_device(dev);
1245 /* Read default IRQs and fixup if necessary */
1246 list_for_each_entry(dev, &bus->devices, bus_list) {
1247 pci_read_irq_line(dev);
1248 if (ppc_md.pci_irq_fixup)
1249 ppc_md.pci_irq_fixup(dev);
1253 void __devinit pcibios_fixup_bus(struct pci_bus *bus)
1255 struct pci_dev *dev = bus->self;
1256 struct device_node *np;
1258 np = pci_bus_to_OF_node(bus);
1260 DBG("pcibios_fixup_bus(%s)\n", np ? np->full_name : "<???>");
1262 if (dev && pci_probe_only &&
1263 (dev->class >> 8) == PCI_CLASS_BRIDGE_PCI) {
1264 /* This is a subordinate bridge */
1266 pci_read_bridge_bases(bus);
1267 pcibios_fixup_device_resources(dev, bus);
1272 if (!pci_probe_only)
1275 list_for_each_entry(dev, &bus->devices, bus_list)
1276 if ((dev->class >> 8) != PCI_CLASS_BRIDGE_PCI)
1277 pcibios_fixup_device_resources(dev, bus);
1279 EXPORT_SYMBOL(pcibios_fixup_bus);
1282 * Reads the interrupt pin to determine if interrupt is use by card.
1283 * If the interrupt is used, then gets the interrupt line from the
1284 * openfirmware and sets it in the pci_dev and pci_config line.
1286 int pci_read_irq_line(struct pci_dev *pci_dev)
1291 DBG("Try to map irq for %s...\n", pci_name(pci_dev));
1294 memset(&oirq, 0xff, sizeof(oirq));
1296 /* Try to get a mapping from the device-tree */
1297 if (of_irq_map_pci(pci_dev, &oirq)) {
1300 /* If that fails, lets fallback to what is in the config
1301 * space and map that through the default controller. We
1302 * also set the type to level low since that's what PCI
1303 * interrupts are. If your platform does differently, then
1304 * either provide a proper interrupt tree or don't use this
1307 if (pci_read_config_byte(pci_dev, PCI_INTERRUPT_PIN, &pin))
1311 if (pci_read_config_byte(pci_dev, PCI_INTERRUPT_LINE, &line) ||
1315 DBG(" -> no map ! Using irq line %d from PCI config\n", line);
1317 virq = irq_create_mapping(NULL, line);
1319 set_irq_type(virq, IRQ_TYPE_LEVEL_LOW);
1321 DBG(" -> got one, spec %d cells (0x%08x 0x%08x...) on %s\n",
1322 oirq.size, oirq.specifier[0], oirq.specifier[1],
1323 oirq.controller->full_name);
1325 virq = irq_create_of_mapping(oirq.controller, oirq.specifier,
1328 if(virq == NO_IRQ) {
1329 DBG(" -> failed to map !\n");
1333 DBG(" -> mapped to linux irq %d\n", virq);
1335 pci_dev->irq = virq;
1339 EXPORT_SYMBOL(pci_read_irq_line);
1341 void pci_resource_to_user(const struct pci_dev *dev, int bar,
1342 const struct resource *rsrc,
1343 resource_size_t *start, resource_size_t *end)
1345 struct pci_controller *hose = pci_bus_to_host(dev->bus);
1346 resource_size_t offset = 0;
1351 if (rsrc->flags & IORESOURCE_IO)
1352 offset = (unsigned long)hose->io_base_virt - pci_io_base;
1354 /* We pass a fully fixed up address to userland for MMIO instead of
1355 * a BAR value because X is lame and expects to be able to use that
1356 * to pass to /dev/mem !
1358 * That means that we'll have potentially 64 bits values where some
1359 * userland apps only expect 32 (like X itself since it thinks only
1360 * Sparc has 64 bits MMIO) but if we don't do that, we break it on
1363 * Hopefully, the sysfs insterface is immune to that gunk. Once X
1364 * has been fixed (and the fix spread enough), we can re-enable the
1365 * 2 lines below and pass down a BAR value to userland. In that case
1366 * we'll also have to re-enable the matching code in
1367 * __pci_mmap_make_offset().
1372 else if (rsrc->flags & IORESOURCE_MEM)
1373 offset = hose->pci_mem_offset;
1376 *start = rsrc->start - offset;
1377 *end = rsrc->end - offset;
1380 struct pci_controller* pci_find_hose_for_OF_device(struct device_node* node)
1385 struct pci_controller *hose, *tmp;
1386 list_for_each_entry_safe(hose, tmp, &hose_list, list_node)
1387 if (hose->arch_data == node)
1389 node = node->parent;
1394 unsigned long pci_address_to_pio(phys_addr_t address)
1396 struct pci_controller *hose, *tmp;
1398 list_for_each_entry_safe(hose, tmp, &hose_list, list_node) {
1399 if (address >= hose->io_base_phys &&
1400 address < (hose->io_base_phys + hose->pci_io_size)) {
1401 unsigned long base =
1402 (unsigned long)hose->io_base_virt - pci_io_base;
1403 return base + (address - hose->io_base_phys);
1406 return (unsigned int)-1;
1408 EXPORT_SYMBOL_GPL(pci_address_to_pio);
1411 #define IOBASE_BRIDGE_NUMBER 0
1412 #define IOBASE_MEMORY 1
1414 #define IOBASE_ISA_IO 3
1415 #define IOBASE_ISA_MEM 4
1417 long sys_pciconfig_iobase(long which, unsigned long in_bus,
1418 unsigned long in_devfn)
1420 struct pci_controller* hose;
1421 struct list_head *ln;
1422 struct pci_bus *bus = NULL;
1423 struct device_node *hose_node;
1425 /* Argh ! Please forgive me for that hack, but that's the
1426 * simplest way to get existing XFree to not lockup on some
1427 * G5 machines... So when something asks for bus 0 io base
1428 * (bus 0 is HT root), we return the AGP one instead.
1430 if (machine_is_compatible("MacRISC4"))
1434 /* That syscall isn't quite compatible with PCI domains, but it's
1435 * used on pre-domains setup. We return the first match
1438 for (ln = pci_root_buses.next; ln != &pci_root_buses; ln = ln->next) {
1439 bus = pci_bus_b(ln);
1440 if (in_bus >= bus->number && in_bus <= bus->subordinate)
1444 if (bus == NULL || bus->sysdata == NULL)
1447 hose_node = (struct device_node *)bus->sysdata;
1448 hose = PCI_DN(hose_node)->phb;
1451 case IOBASE_BRIDGE_NUMBER:
1452 return (long)hose->first_busno;
1454 return (long)hose->pci_mem_offset;
1456 return (long)hose->io_base_phys;
1458 return (long)isa_io_base;
1459 case IOBASE_ISA_MEM:
1467 int pcibus_to_node(struct pci_bus *bus)
1469 struct pci_controller *phb = pci_bus_to_host(bus);
1472 EXPORT_SYMBOL(pcibus_to_node);