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/config.h>
17 #include <linux/kernel.h>
18 #include <linux/pci.h>
19 #include <linux/string.h>
20 #include <linux/init.h>
21 #include <linux/bootmem.h>
23 #include <linux/list.h>
24 #include <linux/syscalls.h>
26 #include <asm/processor.h>
29 #include <asm/pci-bridge.h>
30 #include <asm/byteorder.h>
32 #include <asm/machdep.h>
33 #include <asm/ppc-pci.h>
37 #define DBG(fmt...) printk(fmt)
42 unsigned long pci_probe_only = 1;
43 int pci_assign_all_buses = 0;
45 #ifdef CONFIG_PPC_MULTIPLATFORM
46 static void fixup_resource(struct resource *res, struct pci_dev *dev);
47 static void do_bus_setup(struct pci_bus *bus);
48 static void phbs_remap_io(void);
51 /* pci_io_base -- the base address from which io bars are offsets.
52 * This is the lowest I/O base address (so bar values are always positive),
53 * and it *must* be the start of ISA space if an ISA bus exists because
54 * ISA drivers use hard coded offsets. If no ISA bus exists a dummy
55 * page is mapped and isa_io_limit prevents access to it.
57 unsigned long isa_io_base; /* NULL if no ISA bus */
58 EXPORT_SYMBOL(isa_io_base);
59 unsigned long pci_io_base;
60 EXPORT_SYMBOL(pci_io_base);
62 void iSeries_pcibios_init(void);
66 struct dma_mapping_ops pci_dma_ops;
67 EXPORT_SYMBOL(pci_dma_ops);
69 int global_phb_number; /* Global phb counter */
71 /* Cached ISA bridge dev. */
72 struct pci_dev *ppc64_isabridge_dev = NULL;
73 EXPORT_SYMBOL_GPL(ppc64_isabridge_dev);
75 static void fixup_broken_pcnet32(struct pci_dev* dev)
77 if ((dev->class>>8 == PCI_CLASS_NETWORK_ETHERNET)) {
78 dev->vendor = PCI_VENDOR_ID_AMD;
79 pci_write_config_word(dev, PCI_VENDOR_ID, PCI_VENDOR_ID_AMD);
82 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_TRIDENT, PCI_ANY_ID, fixup_broken_pcnet32);
84 void pcibios_resource_to_bus(struct pci_dev *dev, struct pci_bus_region *region,
87 unsigned long offset = 0;
88 struct pci_controller *hose = pci_bus_to_host(dev->bus);
93 if (res->flags & IORESOURCE_IO)
94 offset = (unsigned long)hose->io_base_virt - pci_io_base;
96 if (res->flags & IORESOURCE_MEM)
97 offset = hose->pci_mem_offset;
99 region->start = res->start - offset;
100 region->end = res->end - offset;
103 void pcibios_bus_to_resource(struct pci_dev *dev, struct resource *res,
104 struct pci_bus_region *region)
106 unsigned long offset = 0;
107 struct pci_controller *hose = pci_bus_to_host(dev->bus);
112 if (res->flags & IORESOURCE_IO)
113 offset = (unsigned long)hose->io_base_virt - pci_io_base;
115 if (res->flags & IORESOURCE_MEM)
116 offset = hose->pci_mem_offset;
118 res->start = region->start + offset;
119 res->end = region->end + offset;
122 #ifdef CONFIG_HOTPLUG
123 EXPORT_SYMBOL(pcibios_resource_to_bus);
124 EXPORT_SYMBOL(pcibios_bus_to_resource);
128 * We need to avoid collisions with `mirrored' VGA ports
129 * and other strange ISA hardware, so we always want the
130 * addresses to be allocated in the 0x000-0x0ff region
133 * Why? Because some silly external IO cards only decode
134 * the low 10 bits of the IO address. The 0x00-0xff region
135 * is reserved for motherboard devices that decode all 16
136 * bits, so it's ok to allocate at, say, 0x2800-0x28ff,
137 * but we want to try to avoid allocating at 0x2900-0x2bff
138 * which might have be mirrored at 0x0100-0x03ff..
140 void pcibios_align_resource(void *data, struct resource *res,
141 unsigned long size, unsigned long align)
143 struct pci_dev *dev = data;
144 struct pci_controller *hose = pci_bus_to_host(dev->bus);
145 unsigned long start = res->start;
146 unsigned long alignto;
148 if (res->flags & IORESOURCE_IO) {
149 unsigned long offset = (unsigned long)hose->io_base_virt -
151 /* Make sure we start at our min on all hoses */
152 if (start - offset < PCIBIOS_MIN_IO)
153 start = PCIBIOS_MIN_IO + offset;
156 * Put everything into 0x00-0xff region modulo 0x400
159 start = (start + 0x3ff) & ~0x3ff;
161 } else if (res->flags & IORESOURCE_MEM) {
162 /* Make sure we start at our min on all hoses */
163 if (start - hose->pci_mem_offset < PCIBIOS_MIN_MEM)
164 start = PCIBIOS_MIN_MEM + hose->pci_mem_offset;
166 /* Align to multiple of size of minimum base. */
167 alignto = max(0x1000UL, align);
168 start = ALIGN(start, alignto);
174 static DEFINE_SPINLOCK(hose_spinlock);
177 * pci_controller(phb) initialized common variables.
179 static void __devinit pci_setup_pci_controller(struct pci_controller *hose)
181 memset(hose, 0, sizeof(struct pci_controller));
183 spin_lock(&hose_spinlock);
184 hose->global_number = global_phb_number++;
185 list_add_tail(&hose->list_node, &hose_list);
186 spin_unlock(&hose_spinlock);
189 static void add_linux_pci_domain(struct device_node *dev,
190 struct pci_controller *phb)
192 struct property *of_prop;
195 of_prop = (struct property *)
196 get_property(dev, "linux,pci-domain", &size);
199 WARN_ON(of_prop && size < sizeof(int));
200 if (of_prop && size < sizeof(int))
202 size = sizeof(struct property) + sizeof(int);
203 if (of_prop == NULL) {
205 of_prop = kmalloc(size, GFP_KERNEL);
207 of_prop = alloc_bootmem(size);
209 memset(of_prop, 0, sizeof(struct property));
210 of_prop->name = "linux,pci-domain";
211 of_prop->length = sizeof(int);
212 of_prop->value = (unsigned char *)&of_prop[1];
213 *((int *)of_prop->value) = phb->global_number;
214 prom_add_property(dev, of_prop);
217 struct pci_controller * pcibios_alloc_controller(struct device_node *dev)
219 struct pci_controller *phb;
222 phb = kmalloc(sizeof(struct pci_controller), GFP_KERNEL);
224 phb = alloc_bootmem(sizeof (struct pci_controller));
227 pci_setup_pci_controller(phb);
228 phb->arch_data = dev;
229 phb->is_dynamic = mem_init_done;
231 PHB_SET_NODE(phb, of_node_to_nid(dev));
232 add_linux_pci_domain(dev, phb);
237 void pcibios_free_controller(struct pci_controller *phb)
239 if (phb->arch_data) {
240 struct device_node *np = phb->arch_data;
241 int *domain = (int *)get_property(np,
242 "linux,pci-domain", NULL);
250 #ifndef CONFIG_PPC_ISERIES
251 void __devinit pcibios_claim_one_bus(struct pci_bus *b)
254 struct pci_bus *child_bus;
256 list_for_each_entry(dev, &b->devices, bus_list) {
259 for (i = 0; i < PCI_NUM_RESOURCES; i++) {
260 struct resource *r = &dev->resource[i];
262 if (r->parent || !r->start || !r->flags)
264 pci_claim_resource(dev, i);
268 list_for_each_entry(child_bus, &b->children, node)
269 pcibios_claim_one_bus(child_bus);
271 #ifdef CONFIG_HOTPLUG
272 EXPORT_SYMBOL_GPL(pcibios_claim_one_bus);
275 static void __init pcibios_claim_of_setup(void)
279 list_for_each_entry(b, &pci_root_buses, node)
280 pcibios_claim_one_bus(b);
284 #ifdef CONFIG_PPC_MULTIPLATFORM
285 static u32 get_int_prop(struct device_node *np, const char *name, u32 def)
290 prop = (u32 *) get_property(np, name, &len);
291 if (prop && len >= 4)
296 static unsigned int pci_parse_of_flags(u32 addr0)
298 unsigned int flags = 0;
300 if (addr0 & 0x02000000) {
301 flags = IORESOURCE_MEM | PCI_BASE_ADDRESS_SPACE_MEMORY;
302 flags |= (addr0 >> 22) & PCI_BASE_ADDRESS_MEM_TYPE_64;
303 flags |= (addr0 >> 28) & PCI_BASE_ADDRESS_MEM_TYPE_1M;
304 if (addr0 & 0x40000000)
305 flags |= IORESOURCE_PREFETCH
306 | PCI_BASE_ADDRESS_MEM_PREFETCH;
307 } else if (addr0 & 0x01000000)
308 flags = IORESOURCE_IO | PCI_BASE_ADDRESS_SPACE_IO;
312 #define GET_64BIT(prop, i) ((((u64) (prop)[(i)]) << 32) | (prop)[(i)+1])
314 static void pci_parse_of_addrs(struct device_node *node, struct pci_dev *dev)
318 struct resource *res;
322 addrs = (u32 *) get_property(node, "assigned-addresses", &proplen);
325 DBG(" parse addresses (%d bytes) @ %p\n", proplen, addrs);
326 for (; proplen >= 20; proplen -= 20, addrs += 5) {
327 flags = pci_parse_of_flags(addrs[0]);
330 base = GET_64BIT(addrs, 1);
331 size = GET_64BIT(addrs, 3);
335 DBG(" base: %llx, size: %llx, i: %x\n",
336 (unsigned long long)base, (unsigned long long)size, i);
338 if (PCI_BASE_ADDRESS_0 <= i && i <= PCI_BASE_ADDRESS_5) {
339 res = &dev->resource[(i - PCI_BASE_ADDRESS_0) >> 2];
340 } else if (i == dev->rom_base_reg) {
341 res = &dev->resource[PCI_ROM_RESOURCE];
342 flags |= IORESOURCE_READONLY | IORESOURCE_CACHEABLE;
344 printk(KERN_ERR "PCI: bad cfg reg num 0x%x\n", i);
348 res->end = base + size - 1;
350 res->name = pci_name(dev);
351 fixup_resource(res, dev);
355 struct pci_dev *of_create_pci_dev(struct device_node *node,
356 struct pci_bus *bus, int devfn)
361 dev = kmalloc(sizeof(struct pci_dev), GFP_KERNEL);
364 type = get_property(node, "device_type", NULL);
368 DBG(" create device, devfn: %x, type: %s\n", devfn, type);
370 memset(dev, 0, sizeof(struct pci_dev));
373 dev->dev.parent = bus->bridge;
374 dev->dev.bus = &pci_bus_type;
376 dev->multifunction = 0; /* maybe a lie? */
378 dev->vendor = get_int_prop(node, "vendor-id", 0xffff);
379 dev->device = get_int_prop(node, "device-id", 0xffff);
380 dev->subsystem_vendor = get_int_prop(node, "subsystem-vendor-id", 0);
381 dev->subsystem_device = get_int_prop(node, "subsystem-id", 0);
383 dev->cfg_size = pci_cfg_space_size(dev);
385 sprintf(pci_name(dev), "%04x:%02x:%02x.%d", pci_domain_nr(bus),
386 dev->bus->number, PCI_SLOT(devfn), PCI_FUNC(devfn));
387 dev->class = get_int_prop(node, "class-code", 0);
389 DBG(" class: 0x%x\n", dev->class);
391 dev->current_state = 4; /* unknown power state */
393 if (!strcmp(type, "pci") || !strcmp(type, "pciex")) {
394 /* a PCI-PCI bridge */
395 dev->hdr_type = PCI_HEADER_TYPE_BRIDGE;
396 dev->rom_base_reg = PCI_ROM_ADDRESS1;
397 } else if (!strcmp(type, "cardbus")) {
398 dev->hdr_type = PCI_HEADER_TYPE_CARDBUS;
400 dev->hdr_type = PCI_HEADER_TYPE_NORMAL;
401 dev->rom_base_reg = PCI_ROM_ADDRESS;
403 if (node->n_intrs > 0) {
404 dev->irq = node->intrs[0].line;
405 pci_write_config_byte(dev, PCI_INTERRUPT_LINE,
410 pci_parse_of_addrs(node, dev);
412 DBG(" adding to system ...\n");
414 pci_device_add(dev, bus);
416 /* XXX pci_scan_msi_device(dev); */
420 EXPORT_SYMBOL(of_create_pci_dev);
422 void __devinit of_scan_bus(struct device_node *node,
425 struct device_node *child = NULL;
430 DBG("of_scan_bus(%s) bus no %d... \n", node->full_name, bus->number);
432 while ((child = of_get_next_child(node, child)) != NULL) {
433 DBG(" * %s\n", child->full_name);
434 reg = (u32 *) get_property(child, "reg", ®len);
435 if (reg == NULL || reglen < 20)
437 devfn = (reg[0] >> 8) & 0xff;
439 /* create a new pci_dev for this device */
440 dev = of_create_pci_dev(child, bus, devfn);
443 DBG("dev header type: %x\n", dev->hdr_type);
445 if (dev->hdr_type == PCI_HEADER_TYPE_BRIDGE ||
446 dev->hdr_type == PCI_HEADER_TYPE_CARDBUS)
447 of_scan_pci_bridge(child, dev);
452 EXPORT_SYMBOL(of_scan_bus);
454 void __devinit of_scan_pci_bridge(struct device_node *node,
458 u32 *busrange, *ranges;
460 struct resource *res;
464 DBG("of_scan_pci_bridge(%s)\n", node->full_name);
466 /* parse bus-range property */
467 busrange = (u32 *) get_property(node, "bus-range", &len);
468 if (busrange == NULL || len != 8) {
469 printk(KERN_DEBUG "Can't get bus-range for PCI-PCI bridge %s\n",
473 ranges = (u32 *) get_property(node, "ranges", &len);
474 if (ranges == NULL) {
475 printk(KERN_DEBUG "Can't get ranges for PCI-PCI bridge %s\n",
480 bus = pci_add_new_bus(dev->bus, dev, busrange[0]);
482 printk(KERN_ERR "Failed to create pci bus for %s\n",
487 bus->primary = dev->bus->number;
488 bus->subordinate = busrange[1];
492 /* parse ranges property */
493 /* PCI #address-cells == 3 and #size-cells == 2 always */
494 res = &dev->resource[PCI_BRIDGE_RESOURCES];
495 for (i = 0; i < PCI_NUM_RESOURCES - PCI_BRIDGE_RESOURCES; ++i) {
497 bus->resource[i] = res;
501 for (; len >= 32; len -= 32, ranges += 8) {
502 flags = pci_parse_of_flags(ranges[0]);
503 size = GET_64BIT(ranges, 6);
504 if (flags == 0 || size == 0)
506 if (flags & IORESOURCE_IO) {
507 res = bus->resource[0];
509 printk(KERN_ERR "PCI: ignoring extra I/O range"
510 " for bridge %s\n", node->full_name);
514 if (i >= PCI_NUM_RESOURCES - PCI_BRIDGE_RESOURCES) {
515 printk(KERN_ERR "PCI: too many memory ranges"
516 " for bridge %s\n", node->full_name);
519 res = bus->resource[i];
522 res->start = GET_64BIT(ranges, 1);
523 res->end = res->start + size - 1;
525 fixup_resource(res, dev);
527 sprintf(bus->name, "PCI Bus %04x:%02x", pci_domain_nr(bus),
529 DBG(" bus name: %s\n", bus->name);
531 mode = PCI_PROBE_NORMAL;
532 if (ppc_md.pci_probe_mode)
533 mode = ppc_md.pci_probe_mode(bus);
534 DBG(" probe mode: %d\n", mode);
536 if (mode == PCI_PROBE_DEVTREE)
537 of_scan_bus(node, bus);
538 else if (mode == PCI_PROBE_NORMAL)
539 pci_scan_child_bus(bus);
541 EXPORT_SYMBOL(of_scan_pci_bridge);
542 #endif /* CONFIG_PPC_MULTIPLATFORM */
544 void __devinit scan_phb(struct pci_controller *hose)
547 struct device_node *node = hose->arch_data;
549 struct resource *res;
551 DBG("Scanning PHB %s\n", node ? node->full_name : "<NO NAME>");
553 bus = pci_create_bus(NULL, hose->first_busno, hose->ops, node);
555 printk(KERN_ERR "Failed to create bus for PCI domain %04x\n",
556 hose->global_number);
559 bus->secondary = hose->first_busno;
562 bus->resource[0] = res = &hose->io_resource;
563 if (res->flags && request_resource(&ioport_resource, res))
564 printk(KERN_ERR "Failed to request PCI IO region "
565 "on PCI domain %04x\n", hose->global_number);
567 for (i = 0; i < 3; ++i) {
568 res = &hose->mem_resources[i];
569 bus->resource[i+1] = res;
570 if (res->flags && request_resource(&iomem_resource, res))
571 printk(KERN_ERR "Failed to request PCI memory region "
572 "on PCI domain %04x\n", hose->global_number);
575 mode = PCI_PROBE_NORMAL;
576 #ifdef CONFIG_PPC_MULTIPLATFORM
577 if (node && ppc_md.pci_probe_mode)
578 mode = ppc_md.pci_probe_mode(bus);
579 DBG(" probe mode: %d\n", mode);
580 if (mode == PCI_PROBE_DEVTREE) {
581 bus->subordinate = hose->last_busno;
582 of_scan_bus(node, bus);
584 #endif /* CONFIG_PPC_MULTIPLATFORM */
585 if (mode == PCI_PROBE_NORMAL)
586 hose->last_busno = bus->subordinate = pci_scan_child_bus(bus);
589 static int __init pcibios_init(void)
591 struct pci_controller *hose, *tmp;
593 /* For now, override phys_mem_access_prot. If we need it,
594 * later, we may move that initialization to each ppc_md
596 ppc_md.phys_mem_access_prot = pci_phys_mem_access_prot;
598 #ifdef CONFIG_PPC_ISERIES
599 iSeries_pcibios_init();
602 printk(KERN_DEBUG "PCI: Probing PCI hardware\n");
604 /* Scan all of the recorded PCI controllers. */
605 list_for_each_entry_safe(hose, tmp, &hose_list, list_node) {
607 pci_bus_add_devices(hose->bus);
610 #ifndef CONFIG_PPC_ISERIES
612 pcibios_claim_of_setup();
614 /* FIXME: `else' will be removed when
615 pci_assign_unassigned_resources() is able to work
616 correctly with [partially] allocated PCI tree. */
617 pci_assign_unassigned_resources();
618 #endif /* !CONFIG_PPC_ISERIES */
620 /* Call machine dependent final fixup */
621 if (ppc_md.pcibios_fixup)
622 ppc_md.pcibios_fixup();
624 /* Cache the location of the ISA bridge (if we have one) */
625 ppc64_isabridge_dev = pci_get_class(PCI_CLASS_BRIDGE_ISA << 8, NULL);
626 if (ppc64_isabridge_dev != NULL)
627 printk(KERN_DEBUG "ISA bridge at %s\n", pci_name(ppc64_isabridge_dev));
629 #ifdef CONFIG_PPC_MULTIPLATFORM
630 /* map in PCI I/O space */
634 printk(KERN_DEBUG "PCI: Probing PCI hardware done\n");
639 subsys_initcall(pcibios_init);
641 char __init *pcibios_setup(char *str)
646 int pcibios_enable_device(struct pci_dev *dev, int mask)
651 pci_read_config_word(dev, PCI_COMMAND, &cmd);
654 for (i = 0; i < PCI_NUM_RESOURCES; i++) {
655 struct resource *res = &dev->resource[i];
657 /* Only set up the requested stuff */
658 if (!(mask & (1<<i)))
661 if (res->flags & IORESOURCE_IO)
662 cmd |= PCI_COMMAND_IO;
663 if (res->flags & IORESOURCE_MEM)
664 cmd |= PCI_COMMAND_MEMORY;
668 printk(KERN_DEBUG "PCI: Enabling device: (%s), cmd %x\n",
670 /* Enable the appropriate bits in the PCI command register. */
671 pci_write_config_word(dev, PCI_COMMAND, cmd);
677 * Return the domain number for this bus.
679 int pci_domain_nr(struct pci_bus *bus)
681 #ifdef CONFIG_PPC_ISERIES
684 struct pci_controller *hose = pci_bus_to_host(bus);
686 return hose->global_number;
690 EXPORT_SYMBOL(pci_domain_nr);
692 /* Decide whether to display the domain number in /proc */
693 int pci_proc_domain(struct pci_bus *bus)
695 #ifdef CONFIG_PPC_ISERIES
698 struct pci_controller *hose = pci_bus_to_host(bus);
704 * Platform support for /proc/bus/pci/X/Y mmap()s,
705 * modelled on the sparc64 implementation by Dave Miller.
710 * Adjust vm_pgoff of VMA such that it is the physical page offset
711 * corresponding to the 32-bit pci bus offset for DEV requested by the user.
713 * Basically, the user finds the base address for his device which he wishes
714 * to mmap. They read the 32-bit value from the config space base register,
715 * add whatever PAGE_SIZE multiple offset they wish, and feed this into the
716 * offset parameter of mmap on /proc/bus/pci/XXX for that device.
718 * Returns negative error code on failure, zero on success.
720 static struct resource *__pci_mmap_make_offset(struct pci_dev *dev,
721 unsigned long *offset,
722 enum pci_mmap_state mmap_state)
724 struct pci_controller *hose = pci_bus_to_host(dev->bus);
725 unsigned long io_offset = 0;
729 return NULL; /* should never happen */
731 /* If memory, add on the PCI bridge address offset */
732 if (mmap_state == pci_mmap_mem) {
733 *offset += hose->pci_mem_offset;
734 res_bit = IORESOURCE_MEM;
736 io_offset = (unsigned long)hose->io_base_virt - pci_io_base;
737 *offset += io_offset;
738 res_bit = IORESOURCE_IO;
742 * Check that the offset requested corresponds to one of the
743 * resources of the device.
745 for (i = 0; i <= PCI_ROM_RESOURCE; i++) {
746 struct resource *rp = &dev->resource[i];
747 int flags = rp->flags;
749 /* treat ROM as memory (should be already) */
750 if (i == PCI_ROM_RESOURCE)
751 flags |= IORESOURCE_MEM;
753 /* Active and same type? */
754 if ((flags & res_bit) == 0)
757 /* In the range of this resource? */
758 if (*offset < (rp->start & PAGE_MASK) || *offset > rp->end)
761 /* found it! construct the final physical address */
762 if (mmap_state == pci_mmap_io)
763 *offset += hose->io_base_phys - io_offset;
771 * Set vm_page_prot of VMA, as appropriate for this architecture, for a pci
774 static pgprot_t __pci_mmap_set_pgprot(struct pci_dev *dev, struct resource *rp,
776 enum pci_mmap_state mmap_state,
779 unsigned long prot = pgprot_val(protection);
781 /* Write combine is always 0 on non-memory space mappings. On
782 * memory space, if the user didn't pass 1, we check for a
783 * "prefetchable" resource. This is a bit hackish, but we use
784 * this to workaround the inability of /sysfs to provide a write
787 if (mmap_state != pci_mmap_mem)
789 else if (write_combine == 0) {
790 if (rp->flags & IORESOURCE_PREFETCH)
794 /* XXX would be nice to have a way to ask for write-through */
795 prot |= _PAGE_NO_CACHE;
797 prot &= ~_PAGE_GUARDED;
799 prot |= _PAGE_GUARDED;
801 printk(KERN_DEBUG "PCI map for %s:%lx, prot: %lx\n", pci_name(dev), rp->start,
804 return __pgprot(prot);
808 * This one is used by /dev/mem and fbdev who have no clue about the
809 * PCI device, it tries to find the PCI device first and calls the
812 pgprot_t pci_phys_mem_access_prot(struct file *file,
817 struct pci_dev *pdev = NULL;
818 struct resource *found = NULL;
819 unsigned long prot = pgprot_val(protection);
820 unsigned long offset = pfn << PAGE_SHIFT;
823 if (page_is_ram(pfn))
824 return __pgprot(prot);
826 prot |= _PAGE_NO_CACHE | _PAGE_GUARDED;
828 for_each_pci_dev(pdev) {
829 for (i = 0; i <= PCI_ROM_RESOURCE; i++) {
830 struct resource *rp = &pdev->resource[i];
831 int flags = rp->flags;
833 /* Active and same type? */
834 if ((flags & IORESOURCE_MEM) == 0)
836 /* In the range of this resource? */
837 if (offset < (rp->start & PAGE_MASK) ||
847 if (found->flags & IORESOURCE_PREFETCH)
848 prot &= ~_PAGE_GUARDED;
852 DBG("non-PCI map for %lx, prot: %lx\n", offset, prot);
854 return __pgprot(prot);
859 * Perform the actual remap of the pages for a PCI device mapping, as
860 * appropriate for this architecture. The region in the process to map
861 * is described by vm_start and vm_end members of VMA, the base physical
862 * address is found in vm_pgoff.
863 * The pci device structure is provided so that architectures may make mapping
864 * decisions on a per-device or per-bus basis.
866 * Returns a negative error code on failure, zero on success.
868 int pci_mmap_page_range(struct pci_dev *dev, struct vm_area_struct *vma,
869 enum pci_mmap_state mmap_state, int write_combine)
871 unsigned long offset = vma->vm_pgoff << PAGE_SHIFT;
875 rp = __pci_mmap_make_offset(dev, &offset, mmap_state);
879 vma->vm_pgoff = offset >> PAGE_SHIFT;
880 vma->vm_flags |= VM_SHM | VM_LOCKED | VM_IO;
881 vma->vm_page_prot = __pci_mmap_set_pgprot(dev, rp,
883 mmap_state, write_combine);
885 ret = remap_pfn_range(vma, vma->vm_start, vma->vm_pgoff,
886 vma->vm_end - vma->vm_start, vma->vm_page_prot);
891 static ssize_t pci_show_devspec(struct device *dev,
892 struct device_attribute *attr, char *buf)
894 struct pci_dev *pdev;
895 struct device_node *np;
897 pdev = to_pci_dev (dev);
898 np = pci_device_to_OF_node(pdev);
899 if (np == NULL || np->full_name == NULL)
901 return sprintf(buf, "%s", np->full_name);
903 static DEVICE_ATTR(devspec, S_IRUGO, pci_show_devspec, NULL);
905 void pcibios_add_platform_entries(struct pci_dev *pdev)
907 device_create_file(&pdev->dev, &dev_attr_devspec);
910 #ifdef CONFIG_PPC_MULTIPLATFORM
912 #define ISA_SPACE_MASK 0x1
913 #define ISA_SPACE_IO 0x1
915 static void __devinit pci_process_ISA_OF_ranges(struct device_node *isa_node,
916 unsigned long phb_io_base_phys,
917 void __iomem * phb_io_base_virt)
919 /* Remove these asap */
933 struct isa_address isa_addr;
934 struct pci_address pci_addr;
938 struct isa_range *range;
939 unsigned long pci_addr;
940 unsigned int isa_addr;
944 range = (struct isa_range *) get_property(isa_node, "ranges", &rlen);
945 if (range == NULL || (rlen < sizeof(struct isa_range))) {
946 printk(KERN_ERR "no ISA ranges or unexpected isa range size,"
948 __ioremap_explicit(phb_io_base_phys,
949 (unsigned long)phb_io_base_virt,
950 0x10000, _PAGE_NO_CACHE | _PAGE_GUARDED);
954 /* From "ISA Binding to 1275"
955 * The ranges property is laid out as an array of elements,
956 * each of which comprises:
957 * cells 0 - 1: an ISA address
958 * cells 2 - 4: a PCI address
959 * (size depending on dev->n_addr_cells)
960 * cell 5: the size of the range
962 if ((range->isa_addr.a_hi && ISA_SPACE_MASK) == ISA_SPACE_IO) {
963 isa_addr = range->isa_addr.a_lo;
964 pci_addr = (unsigned long) range->pci_addr.a_mid << 32 |
965 range->pci_addr.a_lo;
967 /* Assume these are both zero */
968 if ((pci_addr != 0) || (isa_addr != 0)) {
969 printk(KERN_ERR "unexpected isa to pci mapping: %s\n",
974 size = PAGE_ALIGN(range->size);
976 __ioremap_explicit(phb_io_base_phys,
977 (unsigned long) phb_io_base_virt,
978 size, _PAGE_NO_CACHE | _PAGE_GUARDED);
982 void __devinit pci_process_bridge_OF_ranges(struct pci_controller *hose,
983 struct device_node *dev, int prim)
985 unsigned int *ranges, pci_space;
989 struct resource *res;
990 int np, na = prom_n_addr_cells(dev);
991 unsigned long pci_addr, cpu_phys_addr;
995 /* From "PCI Binding to 1275"
996 * The ranges property is laid out as an array of elements,
997 * each of which comprises:
998 * cells 0 - 2: a PCI address
999 * cells 3 or 3+4: a CPU physical address
1000 * (size depending on dev->n_addr_cells)
1001 * cells 4+5 or 5+6: the size of the range
1003 ranges = (unsigned int *) get_property(dev, "ranges", &rlen);
1006 hose->io_base_phys = 0;
1007 while ((rlen -= np * sizeof(unsigned int)) >= 0) {
1009 pci_space = ranges[0];
1010 pci_addr = ((unsigned long)ranges[1] << 32) | ranges[2];
1012 cpu_phys_addr = ranges[3];
1014 cpu_phys_addr = (cpu_phys_addr << 32) | ranges[4];
1016 size = ((unsigned long)ranges[na+3] << 32) | ranges[na+4];
1021 /* Now consume following elements while they are contiguous */
1022 while (rlen >= np * sizeof(unsigned int)) {
1023 unsigned long addr, phys;
1025 if (ranges[0] != pci_space)
1027 addr = ((unsigned long)ranges[1] << 32) | ranges[2];
1030 phys = (phys << 32) | ranges[4];
1031 if (addr != pci_addr + size ||
1032 phys != cpu_phys_addr + size)
1035 size += ((unsigned long)ranges[na+3] << 32)
1038 rlen -= np * sizeof(unsigned int);
1041 switch ((pci_space >> 24) & 0x3) {
1042 case 1: /* I/O space */
1043 hose->io_base_phys = cpu_phys_addr;
1044 hose->pci_io_size = size;
1046 res = &hose->io_resource;
1047 res->flags = IORESOURCE_IO;
1048 res->start = pci_addr;
1049 DBG("phb%d: IO 0x%lx -> 0x%lx\n", hose->global_number,
1050 res->start, res->start + size - 1);
1052 case 2: /* memory space */
1054 while (memno < 3 && hose->mem_resources[memno].flags)
1058 hose->pci_mem_offset = cpu_phys_addr - pci_addr;
1060 res = &hose->mem_resources[memno];
1061 res->flags = IORESOURCE_MEM;
1062 res->start = cpu_phys_addr;
1063 DBG("phb%d: MEM 0x%lx -> 0x%lx\n", hose->global_number,
1064 res->start, res->start + size - 1);
1069 res->name = dev->full_name;
1070 res->end = res->start + size - 1;
1072 res->sibling = NULL;
1078 void __init pci_setup_phb_io(struct pci_controller *hose, int primary)
1080 unsigned long size = hose->pci_io_size;
1081 unsigned long io_virt_offset;
1082 struct resource *res;
1083 struct device_node *isa_dn;
1085 hose->io_base_virt = reserve_phb_iospace(size);
1086 DBG("phb%d io_base_phys 0x%lx io_base_virt 0x%lx\n",
1087 hose->global_number, hose->io_base_phys,
1088 (unsigned long) hose->io_base_virt);
1091 pci_io_base = (unsigned long)hose->io_base_virt;
1092 isa_dn = of_find_node_by_type(NULL, "isa");
1094 isa_io_base = pci_io_base;
1095 pci_process_ISA_OF_ranges(isa_dn, hose->io_base_phys,
1096 hose->io_base_virt);
1097 of_node_put(isa_dn);
1101 io_virt_offset = (unsigned long)hose->io_base_virt - pci_io_base;
1102 res = &hose->io_resource;
1103 res->start += io_virt_offset;
1104 res->end += io_virt_offset;
1107 void __devinit pci_setup_phb_io_dynamic(struct pci_controller *hose,
1110 unsigned long size = hose->pci_io_size;
1111 unsigned long io_virt_offset;
1112 struct resource *res;
1114 hose->io_base_virt = __ioremap(hose->io_base_phys, size,
1115 _PAGE_NO_CACHE | _PAGE_GUARDED);
1116 DBG("phb%d io_base_phys 0x%lx io_base_virt 0x%lx\n",
1117 hose->global_number, hose->io_base_phys,
1118 (unsigned long) hose->io_base_virt);
1121 pci_io_base = (unsigned long)hose->io_base_virt;
1123 io_virt_offset = (unsigned long)hose->io_base_virt - pci_io_base;
1124 res = &hose->io_resource;
1125 res->start += io_virt_offset;
1126 res->end += io_virt_offset;
1130 static int get_bus_io_range(struct pci_bus *bus, unsigned long *start_phys,
1131 unsigned long *start_virt, unsigned long *size)
1133 struct pci_controller *hose = pci_bus_to_host(bus);
1134 struct pci_bus_region region;
1135 struct resource *res;
1138 res = bus->resource[0];
1139 pcibios_resource_to_bus(bus->self, ®ion, res);
1140 *start_phys = hose->io_base_phys + region.start;
1141 *start_virt = (unsigned long) hose->io_base_virt +
1143 if (region.end > region.start)
1144 *size = region.end - region.start + 1;
1146 printk("%s(): unexpected region 0x%lx->0x%lx\n",
1147 __FUNCTION__, region.start, region.end);
1153 res = &hose->io_resource;
1154 *start_phys = hose->io_base_phys;
1155 *start_virt = (unsigned long) hose->io_base_virt;
1156 if (res->end > res->start)
1157 *size = res->end - res->start + 1;
1159 printk("%s(): unexpected region 0x%lx->0x%lx\n",
1160 __FUNCTION__, res->start, res->end);
1168 int unmap_bus_range(struct pci_bus *bus)
1170 unsigned long start_phys;
1171 unsigned long start_virt;
1175 printk(KERN_ERR "%s() expected bus\n", __FUNCTION__);
1179 if (get_bus_io_range(bus, &start_phys, &start_virt, &size))
1181 if (iounmap_explicit((void __iomem *) start_virt, size))
1186 EXPORT_SYMBOL(unmap_bus_range);
1188 int remap_bus_range(struct pci_bus *bus)
1190 unsigned long start_phys;
1191 unsigned long start_virt;
1195 printk(KERN_ERR "%s() expected bus\n", __FUNCTION__);
1200 if (get_bus_io_range(bus, &start_phys, &start_virt, &size))
1202 if (start_phys == 0)
1204 printk(KERN_DEBUG "mapping IO %lx -> %lx, size: %lx\n", start_phys, start_virt, size);
1205 if (__ioremap_explicit(start_phys, start_virt, size,
1206 _PAGE_NO_CACHE | _PAGE_GUARDED))
1211 EXPORT_SYMBOL(remap_bus_range);
1213 static void phbs_remap_io(void)
1215 struct pci_controller *hose, *tmp;
1217 list_for_each_entry_safe(hose, tmp, &hose_list, list_node)
1218 remap_bus_range(hose->bus);
1221 static void __devinit fixup_resource(struct resource *res, struct pci_dev *dev)
1223 struct pci_controller *hose = pci_bus_to_host(dev->bus);
1224 unsigned long offset;
1226 if (res->flags & IORESOURCE_IO) {
1227 offset = (unsigned long)hose->io_base_virt - pci_io_base;
1229 res->start += offset;
1231 } else if (res->flags & IORESOURCE_MEM) {
1232 res->start += hose->pci_mem_offset;
1233 res->end += hose->pci_mem_offset;
1237 void __devinit pcibios_fixup_device_resources(struct pci_dev *dev,
1238 struct pci_bus *bus)
1240 /* Update device resources. */
1243 for (i = 0; i < PCI_NUM_RESOURCES; i++)
1244 if (dev->resource[i].flags)
1245 fixup_resource(&dev->resource[i], dev);
1247 EXPORT_SYMBOL(pcibios_fixup_device_resources);
1250 static void __devinit do_bus_setup(struct pci_bus *bus)
1252 struct pci_dev *dev;
1254 ppc_md.iommu_bus_setup(bus);
1256 list_for_each_entry(dev, &bus->devices, bus_list)
1257 ppc_md.iommu_dev_setup(dev);
1259 if (ppc_md.irq_bus_setup)
1260 ppc_md.irq_bus_setup(bus);
1263 void __devinit pcibios_fixup_bus(struct pci_bus *bus)
1265 struct pci_dev *dev = bus->self;
1267 if (dev && pci_probe_only &&
1268 (dev->class >> 8) == PCI_CLASS_BRIDGE_PCI) {
1269 /* This is a subordinate bridge */
1271 pci_read_bridge_bases(bus);
1272 pcibios_fixup_device_resources(dev, bus);
1277 if (!pci_probe_only)
1280 list_for_each_entry(dev, &bus->devices, bus_list)
1281 if ((dev->class >> 8) != PCI_CLASS_BRIDGE_PCI)
1282 pcibios_fixup_device_resources(dev, bus);
1284 EXPORT_SYMBOL(pcibios_fixup_bus);
1287 * Reads the interrupt pin to determine if interrupt is use by card.
1288 * If the interrupt is used, then gets the interrupt line from the
1289 * openfirmware and sets it in the pci_dev and pci_config line.
1291 int pci_read_irq_line(struct pci_dev *pci_dev)
1294 struct device_node *node;
1296 pci_read_config_byte(pci_dev, PCI_INTERRUPT_PIN, &intpin);
1300 node = pci_device_to_OF_node(pci_dev);
1304 if (node->n_intrs == 0)
1307 pci_dev->irq = node->intrs[0].line;
1309 pci_write_config_byte(pci_dev, PCI_INTERRUPT_LINE, pci_dev->irq);
1313 EXPORT_SYMBOL(pci_read_irq_line);
1315 void pci_resource_to_user(const struct pci_dev *dev, int bar,
1316 const struct resource *rsrc,
1317 u64 *start, u64 *end)
1319 struct pci_controller *hose = pci_bus_to_host(dev->bus);
1320 unsigned long offset = 0;
1325 if (rsrc->flags & IORESOURCE_IO)
1326 offset = pci_io_base - (unsigned long)hose->io_base_virt +
1329 *start = rsrc->start + offset;
1330 *end = rsrc->end + offset;
1333 struct pci_controller* pci_find_hose_for_OF_device(struct device_node* node)
1338 struct pci_controller *hose, *tmp;
1339 list_for_each_entry_safe(hose, tmp, &hose_list, list_node)
1340 if (hose->arch_data == node)
1342 node = node->parent;
1347 #endif /* CONFIG_PPC_MULTIPLATFORM */
1349 unsigned long pci_address_to_pio(phys_addr_t address)
1351 struct pci_controller *hose, *tmp;
1353 list_for_each_entry_safe(hose, tmp, &hose_list, list_node) {
1354 if (address >= hose->io_base_phys &&
1355 address < (hose->io_base_phys + hose->pci_io_size)) {
1356 unsigned long base =
1357 (unsigned long)hose->io_base_virt - pci_io_base;
1358 return base + (address - hose->io_base_phys);
1361 return (unsigned int)-1;
1363 EXPORT_SYMBOL_GPL(pci_address_to_pio);
1366 #define IOBASE_BRIDGE_NUMBER 0
1367 #define IOBASE_MEMORY 1
1369 #define IOBASE_ISA_IO 3
1370 #define IOBASE_ISA_MEM 4
1372 long sys_pciconfig_iobase(long which, unsigned long in_bus,
1373 unsigned long in_devfn)
1375 struct pci_controller* hose;
1376 struct list_head *ln;
1377 struct pci_bus *bus = NULL;
1378 struct device_node *hose_node;
1380 /* Argh ! Please forgive me for that hack, but that's the
1381 * simplest way to get existing XFree to not lockup on some
1382 * G5 machines... So when something asks for bus 0 io base
1383 * (bus 0 is HT root), we return the AGP one instead.
1385 if (machine_is_compatible("MacRISC4"))
1389 /* That syscall isn't quite compatible with PCI domains, but it's
1390 * used on pre-domains setup. We return the first match
1393 for (ln = pci_root_buses.next; ln != &pci_root_buses; ln = ln->next) {
1394 bus = pci_bus_b(ln);
1395 if (in_bus >= bus->number && in_bus < (bus->number + bus->subordinate))
1399 if (bus == NULL || bus->sysdata == NULL)
1402 hose_node = (struct device_node *)bus->sysdata;
1403 hose = PCI_DN(hose_node)->phb;
1406 case IOBASE_BRIDGE_NUMBER:
1407 return (long)hose->first_busno;
1409 return (long)hose->pci_mem_offset;
1411 return (long)hose->io_base_phys;
1413 return (long)isa_io_base;
1414 case IOBASE_ISA_MEM:
1422 int pcibus_to_node(struct pci_bus *bus)
1424 struct pci_controller *phb = pci_bus_to_host(bus);
1427 EXPORT_SYMBOL(pcibus_to_node);