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;
46 * legal IO pages under MAX_ISA_PORT. This is to ensure we don't touch
47 * devices we don't have access to.
49 unsigned long io_page_mask;
51 EXPORT_SYMBOL(io_page_mask);
53 #ifdef CONFIG_PPC_MULTIPLATFORM
54 static void fixup_resource(struct resource *res, struct pci_dev *dev);
55 static void do_bus_setup(struct pci_bus *bus);
56 static void phbs_remap_io(void);
59 /* pci_io_base -- the base address from which io bars are offsets.
60 * This is the lowest I/O base address (so bar values are always positive),
61 * and it *must* be the start of ISA space if an ISA bus exists because
62 * ISA drivers use hard coded offsets. If no ISA bus exists a dummy
63 * page is mapped and isa_io_limit prevents access to it.
65 unsigned long isa_io_base; /* NULL if no ISA bus */
66 EXPORT_SYMBOL(isa_io_base);
67 unsigned long pci_io_base;
68 EXPORT_SYMBOL(pci_io_base);
70 void iSeries_pcibios_init(void);
74 struct dma_mapping_ops pci_dma_ops;
75 EXPORT_SYMBOL(pci_dma_ops);
77 int global_phb_number; /* Global phb counter */
79 /* Cached ISA bridge dev. */
80 struct pci_dev *ppc64_isabridge_dev = NULL;
81 EXPORT_SYMBOL_GPL(ppc64_isabridge_dev);
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 unsigned long size, unsigned long align)
151 struct pci_dev *dev = data;
152 struct pci_controller *hose = pci_bus_to_host(dev->bus);
153 unsigned long 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 static void add_linux_pci_domain(struct device_node *dev,
198 struct pci_controller *phb)
200 struct property *of_prop;
203 of_prop = (struct property *)
204 get_property(dev, "linux,pci-domain", &size);
207 WARN_ON(of_prop && size < sizeof(int));
208 if (of_prop && size < sizeof(int))
210 size = sizeof(struct property) + sizeof(int);
211 if (of_prop == NULL) {
213 of_prop = kmalloc(size, GFP_KERNEL);
215 of_prop = alloc_bootmem(size);
217 memset(of_prop, 0, sizeof(struct property));
218 of_prop->name = "linux,pci-domain";
219 of_prop->length = sizeof(int);
220 of_prop->value = (unsigned char *)&of_prop[1];
221 *((int *)of_prop->value) = phb->global_number;
222 prom_add_property(dev, of_prop);
225 struct pci_controller * pcibios_alloc_controller(struct device_node *dev)
227 struct pci_controller *phb;
230 phb = kmalloc(sizeof(struct pci_controller), GFP_KERNEL);
232 phb = alloc_bootmem(sizeof (struct pci_controller));
235 pci_setup_pci_controller(phb);
236 phb->arch_data = dev;
237 phb->is_dynamic = mem_init_done;
239 add_linux_pci_domain(dev, phb);
243 void pcibios_free_controller(struct pci_controller *phb)
245 if (phb->arch_data) {
246 struct device_node *np = phb->arch_data;
247 int *domain = (int *)get_property(np,
248 "linux,pci-domain", NULL);
256 #ifndef CONFIG_PPC_ISERIES
257 void __devinit pcibios_claim_one_bus(struct pci_bus *b)
260 struct pci_bus *child_bus;
262 list_for_each_entry(dev, &b->devices, bus_list) {
265 for (i = 0; i < PCI_NUM_RESOURCES; i++) {
266 struct resource *r = &dev->resource[i];
268 if (r->parent || !r->start || !r->flags)
270 pci_claim_resource(dev, i);
274 list_for_each_entry(child_bus, &b->children, node)
275 pcibios_claim_one_bus(child_bus);
277 #ifdef CONFIG_HOTPLUG
278 EXPORT_SYMBOL_GPL(pcibios_claim_one_bus);
281 static void __init pcibios_claim_of_setup(void)
285 list_for_each_entry(b, &pci_root_buses, node)
286 pcibios_claim_one_bus(b);
290 #ifdef CONFIG_PPC_MULTIPLATFORM
291 static u32 get_int_prop(struct device_node *np, const char *name, u32 def)
296 prop = (u32 *) get_property(np, name, &len);
297 if (prop && len >= 4)
302 static unsigned int pci_parse_of_flags(u32 addr0)
304 unsigned int flags = 0;
306 if (addr0 & 0x02000000) {
307 flags = IORESOURCE_MEM | PCI_BASE_ADDRESS_SPACE_MEMORY;
308 flags |= (addr0 >> 22) & PCI_BASE_ADDRESS_MEM_TYPE_64;
309 flags |= (addr0 >> 28) & PCI_BASE_ADDRESS_MEM_TYPE_1M;
310 if (addr0 & 0x40000000)
311 flags |= IORESOURCE_PREFETCH
312 | PCI_BASE_ADDRESS_MEM_PREFETCH;
313 } else if (addr0 & 0x01000000)
314 flags = IORESOURCE_IO | PCI_BASE_ADDRESS_SPACE_IO;
318 #define GET_64BIT(prop, i) ((((u64) (prop)[(i)]) << 32) | (prop)[(i)+1])
320 static void pci_parse_of_addrs(struct device_node *node, struct pci_dev *dev)
324 struct resource *res;
328 addrs = (u32 *) get_property(node, "assigned-addresses", &proplen);
331 DBG(" parse addresses (%d bytes) @ %p\n", proplen, addrs);
332 for (; proplen >= 20; proplen -= 20, addrs += 5) {
333 flags = pci_parse_of_flags(addrs[0]);
336 base = GET_64BIT(addrs, 1);
337 size = GET_64BIT(addrs, 3);
341 DBG(" base: %llx, size: %llx, i: %x\n",
342 (unsigned long long)base, (unsigned long long)size, i);
344 if (PCI_BASE_ADDRESS_0 <= i && i <= PCI_BASE_ADDRESS_5) {
345 res = &dev->resource[(i - PCI_BASE_ADDRESS_0) >> 2];
346 } else if (i == dev->rom_base_reg) {
347 res = &dev->resource[PCI_ROM_RESOURCE];
348 flags |= IORESOURCE_READONLY | IORESOURCE_CACHEABLE;
350 printk(KERN_ERR "PCI: bad cfg reg num 0x%x\n", i);
354 res->end = base + size - 1;
356 res->name = pci_name(dev);
357 fixup_resource(res, dev);
361 struct pci_dev *of_create_pci_dev(struct device_node *node,
362 struct pci_bus *bus, int devfn)
367 dev = kmalloc(sizeof(struct pci_dev), GFP_KERNEL);
370 type = get_property(node, "device_type", NULL);
374 DBG(" create device, devfn: %x, type: %s\n", devfn, type);
376 memset(dev, 0, sizeof(struct pci_dev));
379 dev->dev.parent = bus->bridge;
380 dev->dev.bus = &pci_bus_type;
382 dev->multifunction = 0; /* maybe a lie? */
384 dev->vendor = get_int_prop(node, "vendor-id", 0xffff);
385 dev->device = get_int_prop(node, "device-id", 0xffff);
386 dev->subsystem_vendor = get_int_prop(node, "subsystem-vendor-id", 0);
387 dev->subsystem_device = get_int_prop(node, "subsystem-id", 0);
389 dev->cfg_size = pci_cfg_space_size(dev);
391 sprintf(pci_name(dev), "%04x:%02x:%02x.%d", pci_domain_nr(bus),
392 dev->bus->number, PCI_SLOT(devfn), PCI_FUNC(devfn));
393 dev->class = get_int_prop(node, "class-code", 0);
395 DBG(" class: 0x%x\n", dev->class);
397 dev->current_state = 4; /* unknown power state */
399 if (!strcmp(type, "pci")) {
400 /* a PCI-PCI bridge */
401 dev->hdr_type = PCI_HEADER_TYPE_BRIDGE;
402 dev->rom_base_reg = PCI_ROM_ADDRESS1;
403 } else if (!strcmp(type, "cardbus")) {
404 dev->hdr_type = PCI_HEADER_TYPE_CARDBUS;
406 dev->hdr_type = PCI_HEADER_TYPE_NORMAL;
407 dev->rom_base_reg = PCI_ROM_ADDRESS;
409 if (node->n_intrs > 0) {
410 dev->irq = node->intrs[0].line;
411 pci_write_config_byte(dev, PCI_INTERRUPT_LINE,
416 pci_parse_of_addrs(node, dev);
418 DBG(" adding to system ...\n");
420 pci_device_add(dev, bus);
422 /* XXX pci_scan_msi_device(dev); */
426 EXPORT_SYMBOL(of_create_pci_dev);
428 void __devinit of_scan_bus(struct device_node *node,
431 struct device_node *child = NULL;
436 DBG("of_scan_bus(%s) bus no %d... \n", node->full_name, bus->number);
438 while ((child = of_get_next_child(node, child)) != NULL) {
439 DBG(" * %s\n", child->full_name);
440 reg = (u32 *) get_property(child, "reg", ®len);
441 if (reg == NULL || reglen < 20)
443 devfn = (reg[0] >> 8) & 0xff;
445 /* create a new pci_dev for this device */
446 dev = of_create_pci_dev(child, bus, devfn);
449 DBG("dev header type: %x\n", dev->hdr_type);
451 if (dev->hdr_type == PCI_HEADER_TYPE_BRIDGE ||
452 dev->hdr_type == PCI_HEADER_TYPE_CARDBUS)
453 of_scan_pci_bridge(child, dev);
458 EXPORT_SYMBOL(of_scan_bus);
460 void __devinit of_scan_pci_bridge(struct device_node *node,
464 u32 *busrange, *ranges;
466 struct resource *res;
470 DBG("of_scan_pci_bridge(%s)\n", node->full_name);
472 /* parse bus-range property */
473 busrange = (u32 *) get_property(node, "bus-range", &len);
474 if (busrange == NULL || len != 8) {
475 printk(KERN_DEBUG "Can't get bus-range for PCI-PCI bridge %s\n",
479 ranges = (u32 *) get_property(node, "ranges", &len);
480 if (ranges == NULL) {
481 printk(KERN_DEBUG "Can't get ranges for PCI-PCI bridge %s\n",
486 bus = pci_add_new_bus(dev->bus, dev, busrange[0]);
488 printk(KERN_ERR "Failed to create pci bus for %s\n",
493 bus->primary = dev->bus->number;
494 bus->subordinate = busrange[1];
498 /* parse ranges property */
499 /* PCI #address-cells == 3 and #size-cells == 2 always */
500 res = &dev->resource[PCI_BRIDGE_RESOURCES];
501 for (i = 0; i < PCI_NUM_RESOURCES - PCI_BRIDGE_RESOURCES; ++i) {
503 bus->resource[i] = res;
507 for (; len >= 32; len -= 32, ranges += 8) {
508 flags = pci_parse_of_flags(ranges[0]);
509 size = GET_64BIT(ranges, 6);
510 if (flags == 0 || size == 0)
512 if (flags & IORESOURCE_IO) {
513 res = bus->resource[0];
515 printk(KERN_ERR "PCI: ignoring extra I/O range"
516 " for bridge %s\n", node->full_name);
520 if (i >= PCI_NUM_RESOURCES - PCI_BRIDGE_RESOURCES) {
521 printk(KERN_ERR "PCI: too many memory ranges"
522 " for bridge %s\n", node->full_name);
525 res = bus->resource[i];
528 res->start = GET_64BIT(ranges, 1);
529 res->end = res->start + size - 1;
531 fixup_resource(res, dev);
533 sprintf(bus->name, "PCI Bus %04x:%02x", pci_domain_nr(bus),
535 DBG(" bus name: %s\n", bus->name);
537 mode = PCI_PROBE_NORMAL;
538 if (ppc_md.pci_probe_mode)
539 mode = ppc_md.pci_probe_mode(bus);
540 DBG(" probe mode: %d\n", mode);
542 if (mode == PCI_PROBE_DEVTREE)
543 of_scan_bus(node, bus);
544 else if (mode == PCI_PROBE_NORMAL)
545 pci_scan_child_bus(bus);
547 EXPORT_SYMBOL(of_scan_pci_bridge);
548 #endif /* CONFIG_PPC_MULTIPLATFORM */
550 void __devinit scan_phb(struct pci_controller *hose)
553 struct device_node *node = hose->arch_data;
555 struct resource *res;
557 DBG("Scanning PHB %s\n", node ? node->full_name : "<NO NAME>");
559 bus = pci_create_bus(NULL, hose->first_busno, hose->ops, node);
561 printk(KERN_ERR "Failed to create bus for PCI domain %04x\n",
562 hose->global_number);
565 bus->secondary = hose->first_busno;
568 bus->resource[0] = res = &hose->io_resource;
569 if (res->flags && request_resource(&ioport_resource, res))
570 printk(KERN_ERR "Failed to request PCI IO region "
571 "on PCI domain %04x\n", hose->global_number);
573 for (i = 0; i < 3; ++i) {
574 res = &hose->mem_resources[i];
575 bus->resource[i+1] = res;
576 if (res->flags && request_resource(&iomem_resource, res))
577 printk(KERN_ERR "Failed to request PCI memory region "
578 "on PCI domain %04x\n", hose->global_number);
581 mode = PCI_PROBE_NORMAL;
582 #ifdef CONFIG_PPC_MULTIPLATFORM
583 if (node && ppc_md.pci_probe_mode)
584 mode = ppc_md.pci_probe_mode(bus);
585 DBG(" probe mode: %d\n", mode);
586 if (mode == PCI_PROBE_DEVTREE) {
587 bus->subordinate = hose->last_busno;
588 of_scan_bus(node, bus);
590 #endif /* CONFIG_PPC_MULTIPLATFORM */
591 if (mode == PCI_PROBE_NORMAL)
592 hose->last_busno = bus->subordinate = pci_scan_child_bus(bus);
595 static int __init pcibios_init(void)
597 struct pci_controller *hose, *tmp;
599 /* For now, override phys_mem_access_prot. If we need it,
600 * later, we may move that initialization to each ppc_md
602 ppc_md.phys_mem_access_prot = pci_phys_mem_access_prot;
604 #ifdef CONFIG_PPC_ISERIES
605 iSeries_pcibios_init();
608 printk("PCI: Probing PCI hardware\n");
610 /* Scan all of the recorded PCI controllers. */
611 list_for_each_entry_safe(hose, tmp, &hose_list, list_node) {
613 pci_bus_add_devices(hose->bus);
616 #ifndef CONFIG_PPC_ISERIES
618 pcibios_claim_of_setup();
620 /* FIXME: `else' will be removed when
621 pci_assign_unassigned_resources() is able to work
622 correctly with [partially] allocated PCI tree. */
623 pci_assign_unassigned_resources();
624 #endif /* !CONFIG_PPC_ISERIES */
626 /* Call machine dependent final fixup */
627 if (ppc_md.pcibios_fixup)
628 ppc_md.pcibios_fixup();
630 /* Cache the location of the ISA bridge (if we have one) */
631 ppc64_isabridge_dev = pci_get_class(PCI_CLASS_BRIDGE_ISA << 8, NULL);
632 if (ppc64_isabridge_dev != NULL)
633 printk("ISA bridge at %s\n", pci_name(ppc64_isabridge_dev));
635 #ifdef CONFIG_PPC_MULTIPLATFORM
636 /* map in PCI I/O space */
640 printk("PCI: Probing PCI hardware done\n");
645 subsys_initcall(pcibios_init);
647 char __init *pcibios_setup(char *str)
652 int pcibios_enable_device(struct pci_dev *dev, int mask)
657 pci_read_config_word(dev, PCI_COMMAND, &cmd);
660 for (i = 0; i < PCI_NUM_RESOURCES; i++) {
661 struct resource *res = &dev->resource[i];
663 /* Only set up the requested stuff */
664 if (!(mask & (1<<i)))
667 if (res->flags & IORESOURCE_IO)
668 cmd |= PCI_COMMAND_IO;
669 if (res->flags & IORESOURCE_MEM)
670 cmd |= PCI_COMMAND_MEMORY;
674 printk(KERN_DEBUG "PCI: Enabling device: (%s), cmd %x\n",
676 /* Enable the appropriate bits in the PCI command register. */
677 pci_write_config_word(dev, PCI_COMMAND, cmd);
683 * Return the domain number for this bus.
685 int pci_domain_nr(struct pci_bus *bus)
687 #ifdef CONFIG_PPC_ISERIES
690 struct pci_controller *hose = pci_bus_to_host(bus);
692 return hose->global_number;
696 EXPORT_SYMBOL(pci_domain_nr);
698 /* Decide whether to display the domain number in /proc */
699 int pci_proc_domain(struct pci_bus *bus)
701 #ifdef CONFIG_PPC_ISERIES
704 struct pci_controller *hose = pci_bus_to_host(bus);
710 * Platform support for /proc/bus/pci/X/Y mmap()s,
711 * modelled on the sparc64 implementation by Dave Miller.
716 * Adjust vm_pgoff of VMA such that it is the physical page offset
717 * corresponding to the 32-bit pci bus offset for DEV requested by the user.
719 * Basically, the user finds the base address for his device which he wishes
720 * to mmap. They read the 32-bit value from the config space base register,
721 * add whatever PAGE_SIZE multiple offset they wish, and feed this into the
722 * offset parameter of mmap on /proc/bus/pci/XXX for that device.
724 * Returns negative error code on failure, zero on success.
726 static struct resource *__pci_mmap_make_offset(struct pci_dev *dev,
727 unsigned long *offset,
728 enum pci_mmap_state mmap_state)
730 struct pci_controller *hose = pci_bus_to_host(dev->bus);
731 unsigned long io_offset = 0;
735 return NULL; /* should never happen */
737 /* If memory, add on the PCI bridge address offset */
738 if (mmap_state == pci_mmap_mem) {
739 *offset += hose->pci_mem_offset;
740 res_bit = IORESOURCE_MEM;
742 io_offset = (unsigned long)hose->io_base_virt - pci_io_base;
743 *offset += io_offset;
744 res_bit = IORESOURCE_IO;
748 * Check that the offset requested corresponds to one of the
749 * resources of the device.
751 for (i = 0; i <= PCI_ROM_RESOURCE; i++) {
752 struct resource *rp = &dev->resource[i];
753 int flags = rp->flags;
755 /* treat ROM as memory (should be already) */
756 if (i == PCI_ROM_RESOURCE)
757 flags |= IORESOURCE_MEM;
759 /* Active and same type? */
760 if ((flags & res_bit) == 0)
763 /* In the range of this resource? */
764 if (*offset < (rp->start & PAGE_MASK) || *offset > rp->end)
767 /* found it! construct the final physical address */
768 if (mmap_state == pci_mmap_io)
769 *offset += hose->io_base_phys - io_offset;
777 * Set vm_page_prot of VMA, as appropriate for this architecture, for a pci
780 static pgprot_t __pci_mmap_set_pgprot(struct pci_dev *dev, struct resource *rp,
782 enum pci_mmap_state mmap_state,
785 unsigned long prot = pgprot_val(protection);
787 /* Write combine is always 0 on non-memory space mappings. On
788 * memory space, if the user didn't pass 1, we check for a
789 * "prefetchable" resource. This is a bit hackish, but we use
790 * this to workaround the inability of /sysfs to provide a write
793 if (mmap_state != pci_mmap_mem)
795 else if (write_combine == 0) {
796 if (rp->flags & IORESOURCE_PREFETCH)
800 /* XXX would be nice to have a way to ask for write-through */
801 prot |= _PAGE_NO_CACHE;
803 prot &= ~_PAGE_GUARDED;
805 prot |= _PAGE_GUARDED;
807 printk("PCI map for %s:%lx, prot: %lx\n", pci_name(dev), rp->start,
810 return __pgprot(prot);
814 * This one is used by /dev/mem and fbdev who have no clue about the
815 * PCI device, it tries to find the PCI device first and calls the
818 pgprot_t pci_phys_mem_access_prot(struct file *file,
823 struct pci_dev *pdev = NULL;
824 struct resource *found = NULL;
825 unsigned long prot = pgprot_val(protection);
826 unsigned long offset = pfn << PAGE_SHIFT;
829 if (page_is_ram(pfn))
830 return __pgprot(prot);
832 prot |= _PAGE_NO_CACHE | _PAGE_GUARDED;
834 for_each_pci_dev(pdev) {
835 for (i = 0; i <= PCI_ROM_RESOURCE; i++) {
836 struct resource *rp = &pdev->resource[i];
837 int flags = rp->flags;
839 /* Active and same type? */
840 if ((flags & IORESOURCE_MEM) == 0)
842 /* In the range of this resource? */
843 if (offset < (rp->start & PAGE_MASK) ||
853 if (found->flags & IORESOURCE_PREFETCH)
854 prot &= ~_PAGE_GUARDED;
858 DBG("non-PCI map for %lx, prot: %lx\n", offset, prot);
860 return __pgprot(prot);
865 * Perform the actual remap of the pages for a PCI device mapping, as
866 * appropriate for this architecture. The region in the process to map
867 * is described by vm_start and vm_end members of VMA, the base physical
868 * address is found in vm_pgoff.
869 * The pci device structure is provided so that architectures may make mapping
870 * decisions on a per-device or per-bus basis.
872 * Returns a negative error code on failure, zero on success.
874 int pci_mmap_page_range(struct pci_dev *dev, struct vm_area_struct *vma,
875 enum pci_mmap_state mmap_state, int write_combine)
877 unsigned long offset = vma->vm_pgoff << PAGE_SHIFT;
881 rp = __pci_mmap_make_offset(dev, &offset, mmap_state);
885 vma->vm_pgoff = offset >> PAGE_SHIFT;
886 vma->vm_flags |= VM_SHM | VM_LOCKED | VM_IO;
887 vma->vm_page_prot = __pci_mmap_set_pgprot(dev, rp,
889 mmap_state, write_combine);
891 ret = remap_pfn_range(vma, vma->vm_start, vma->vm_pgoff,
892 vma->vm_end - vma->vm_start, vma->vm_page_prot);
897 #ifdef CONFIG_PPC_MULTIPLATFORM
898 static ssize_t pci_show_devspec(struct device *dev, struct device_attribute *attr, char *buf)
900 struct pci_dev *pdev;
901 struct device_node *np;
903 pdev = to_pci_dev (dev);
904 np = pci_device_to_OF_node(pdev);
905 if (np == NULL || np->full_name == NULL)
907 return sprintf(buf, "%s", np->full_name);
909 static DEVICE_ATTR(devspec, S_IRUGO, pci_show_devspec, NULL);
910 #endif /* CONFIG_PPC_MULTIPLATFORM */
912 void pcibios_add_platform_entries(struct pci_dev *pdev)
914 #ifdef CONFIG_PPC_MULTIPLATFORM
915 device_create_file(&pdev->dev, &dev_attr_devspec);
916 #endif /* CONFIG_PPC_MULTIPLATFORM */
919 #ifdef CONFIG_PPC_MULTIPLATFORM
921 #define ISA_SPACE_MASK 0x1
922 #define ISA_SPACE_IO 0x1
924 static void __devinit pci_process_ISA_OF_ranges(struct device_node *isa_node,
925 unsigned long phb_io_base_phys,
926 void __iomem * phb_io_base_virt)
928 /* Remove these asap */
942 struct isa_address isa_addr;
943 struct pci_address pci_addr;
947 struct isa_range *range;
948 unsigned long pci_addr;
949 unsigned int isa_addr;
953 range = (struct isa_range *) get_property(isa_node, "ranges", &rlen);
954 if (range == NULL || (rlen < sizeof(struct isa_range))) {
955 printk(KERN_ERR "no ISA ranges or unexpected isa range size,"
957 __ioremap_explicit(phb_io_base_phys,
958 (unsigned long)phb_io_base_virt,
959 0x10000, _PAGE_NO_CACHE | _PAGE_GUARDED);
963 /* From "ISA Binding to 1275"
964 * The ranges property is laid out as an array of elements,
965 * each of which comprises:
966 * cells 0 - 1: an ISA address
967 * cells 2 - 4: a PCI address
968 * (size depending on dev->n_addr_cells)
969 * cell 5: the size of the range
971 if ((range->isa_addr.a_hi && ISA_SPACE_MASK) == ISA_SPACE_IO) {
972 isa_addr = range->isa_addr.a_lo;
973 pci_addr = (unsigned long) range->pci_addr.a_mid << 32 |
974 range->pci_addr.a_lo;
976 /* Assume these are both zero */
977 if ((pci_addr != 0) || (isa_addr != 0)) {
978 printk(KERN_ERR "unexpected isa to pci mapping: %s\n",
983 size = PAGE_ALIGN(range->size);
985 __ioremap_explicit(phb_io_base_phys,
986 (unsigned long) phb_io_base_virt,
987 size, _PAGE_NO_CACHE | _PAGE_GUARDED);
991 void __devinit pci_process_bridge_OF_ranges(struct pci_controller *hose,
992 struct device_node *dev, int prim)
994 unsigned int *ranges, pci_space;
998 struct resource *res;
999 int np, na = prom_n_addr_cells(dev);
1000 unsigned long pci_addr, cpu_phys_addr;
1004 /* From "PCI Binding to 1275"
1005 * The ranges property is laid out as an array of elements,
1006 * each of which comprises:
1007 * cells 0 - 2: a PCI address
1008 * cells 3 or 3+4: a CPU physical address
1009 * (size depending on dev->n_addr_cells)
1010 * cells 4+5 or 5+6: the size of the range
1012 ranges = (unsigned int *) get_property(dev, "ranges", &rlen);
1015 hose->io_base_phys = 0;
1016 while ((rlen -= np * sizeof(unsigned int)) >= 0) {
1018 pci_space = ranges[0];
1019 pci_addr = ((unsigned long)ranges[1] << 32) | ranges[2];
1021 cpu_phys_addr = ranges[3];
1023 cpu_phys_addr = (cpu_phys_addr << 32) | ranges[4];
1025 size = ((unsigned long)ranges[na+3] << 32) | ranges[na+4];
1030 /* Now consume following elements while they are contiguous */
1031 while (rlen >= np * sizeof(unsigned int)) {
1032 unsigned long addr, phys;
1034 if (ranges[0] != pci_space)
1036 addr = ((unsigned long)ranges[1] << 32) | ranges[2];
1039 phys = (phys << 32) | ranges[4];
1040 if (addr != pci_addr + size ||
1041 phys != cpu_phys_addr + size)
1044 size += ((unsigned long)ranges[na+3] << 32)
1047 rlen -= np * sizeof(unsigned int);
1050 switch ((pci_space >> 24) & 0x3) {
1051 case 1: /* I/O space */
1052 hose->io_base_phys = cpu_phys_addr;
1053 hose->pci_io_size = size;
1055 res = &hose->io_resource;
1056 res->flags = IORESOURCE_IO;
1057 res->start = pci_addr;
1058 DBG("phb%d: IO 0x%lx -> 0x%lx\n", hose->global_number,
1059 res->start, res->start + size - 1);
1061 case 2: /* memory space */
1063 while (memno < 3 && hose->mem_resources[memno].flags)
1067 hose->pci_mem_offset = cpu_phys_addr - pci_addr;
1069 res = &hose->mem_resources[memno];
1070 res->flags = IORESOURCE_MEM;
1071 res->start = cpu_phys_addr;
1072 DBG("phb%d: MEM 0x%lx -> 0x%lx\n", hose->global_number,
1073 res->start, res->start + size - 1);
1078 res->name = dev->full_name;
1079 res->end = res->start + size - 1;
1081 res->sibling = NULL;
1087 void __init pci_setup_phb_io(struct pci_controller *hose, int primary)
1089 unsigned long size = hose->pci_io_size;
1090 unsigned long io_virt_offset;
1091 struct resource *res;
1092 struct device_node *isa_dn;
1094 hose->io_base_virt = reserve_phb_iospace(size);
1095 DBG("phb%d io_base_phys 0x%lx io_base_virt 0x%lx\n",
1096 hose->global_number, hose->io_base_phys,
1097 (unsigned long) hose->io_base_virt);
1100 pci_io_base = (unsigned long)hose->io_base_virt;
1101 isa_dn = of_find_node_by_type(NULL, "isa");
1103 isa_io_base = pci_io_base;
1104 pci_process_ISA_OF_ranges(isa_dn, hose->io_base_phys,
1105 hose->io_base_virt);
1106 of_node_put(isa_dn);
1112 io_virt_offset = (unsigned long)hose->io_base_virt - pci_io_base;
1113 res = &hose->io_resource;
1114 res->start += io_virt_offset;
1115 res->end += io_virt_offset;
1118 void __devinit pci_setup_phb_io_dynamic(struct pci_controller *hose,
1121 unsigned long size = hose->pci_io_size;
1122 unsigned long io_virt_offset;
1123 struct resource *res;
1125 hose->io_base_virt = __ioremap(hose->io_base_phys, size,
1126 _PAGE_NO_CACHE | _PAGE_GUARDED);
1127 DBG("phb%d io_base_phys 0x%lx io_base_virt 0x%lx\n",
1128 hose->global_number, hose->io_base_phys,
1129 (unsigned long) hose->io_base_virt);
1132 pci_io_base = (unsigned long)hose->io_base_virt;
1134 io_virt_offset = (unsigned long)hose->io_base_virt - pci_io_base;
1135 res = &hose->io_resource;
1136 res->start += io_virt_offset;
1137 res->end += io_virt_offset;
1141 static int get_bus_io_range(struct pci_bus *bus, unsigned long *start_phys,
1142 unsigned long *start_virt, unsigned long *size)
1144 struct pci_controller *hose = pci_bus_to_host(bus);
1145 struct pci_bus_region region;
1146 struct resource *res;
1149 res = bus->resource[0];
1150 pcibios_resource_to_bus(bus->self, ®ion, res);
1151 *start_phys = hose->io_base_phys + region.start;
1152 *start_virt = (unsigned long) hose->io_base_virt +
1154 if (region.end > region.start)
1155 *size = region.end - region.start + 1;
1157 printk("%s(): unexpected region 0x%lx->0x%lx\n",
1158 __FUNCTION__, region.start, region.end);
1164 res = &hose->io_resource;
1165 *start_phys = hose->io_base_phys;
1166 *start_virt = (unsigned long) hose->io_base_virt;
1167 if (res->end > res->start)
1168 *size = res->end - res->start + 1;
1170 printk("%s(): unexpected region 0x%lx->0x%lx\n",
1171 __FUNCTION__, res->start, res->end);
1179 int unmap_bus_range(struct pci_bus *bus)
1181 unsigned long start_phys;
1182 unsigned long start_virt;
1186 printk(KERN_ERR "%s() expected bus\n", __FUNCTION__);
1190 if (get_bus_io_range(bus, &start_phys, &start_virt, &size))
1192 if (iounmap_explicit((void __iomem *) start_virt, size))
1197 EXPORT_SYMBOL(unmap_bus_range);
1199 int remap_bus_range(struct pci_bus *bus)
1201 unsigned long start_phys;
1202 unsigned long start_virt;
1206 printk(KERN_ERR "%s() expected bus\n", __FUNCTION__);
1211 if (get_bus_io_range(bus, &start_phys, &start_virt, &size))
1213 if (start_phys == 0)
1215 printk("mapping IO %lx -> %lx, size: %lx\n", start_phys, start_virt, size);
1216 if (__ioremap_explicit(start_phys, start_virt, size,
1217 _PAGE_NO_CACHE | _PAGE_GUARDED))
1222 EXPORT_SYMBOL(remap_bus_range);
1224 static void phbs_remap_io(void)
1226 struct pci_controller *hose, *tmp;
1228 list_for_each_entry_safe(hose, tmp, &hose_list, list_node)
1229 remap_bus_range(hose->bus);
1232 static void __devinit fixup_resource(struct resource *res, struct pci_dev *dev)
1234 struct pci_controller *hose = pci_bus_to_host(dev->bus);
1235 unsigned long start, end, mask, offset;
1237 if (res->flags & IORESOURCE_IO) {
1238 offset = (unsigned long)hose->io_base_virt - pci_io_base;
1240 start = res->start += offset;
1241 end = res->end += offset;
1243 /* Need to allow IO access to pages that are in the
1245 if (start < MAX_ISA_PORT) {
1246 if (end > MAX_ISA_PORT)
1249 start >>= PAGE_SHIFT;
1252 /* get the range of pages for the map */
1253 mask = ((1 << (end+1)) - 1) ^ ((1 << start) - 1);
1254 io_page_mask |= mask;
1256 } else if (res->flags & IORESOURCE_MEM) {
1257 res->start += hose->pci_mem_offset;
1258 res->end += hose->pci_mem_offset;
1262 void __devinit pcibios_fixup_device_resources(struct pci_dev *dev,
1263 struct pci_bus *bus)
1265 /* Update device resources. */
1268 for (i = 0; i < PCI_NUM_RESOURCES; i++)
1269 if (dev->resource[i].flags)
1270 fixup_resource(&dev->resource[i], dev);
1272 EXPORT_SYMBOL(pcibios_fixup_device_resources);
1275 static void __devinit do_bus_setup(struct pci_bus *bus)
1277 struct pci_dev *dev;
1279 ppc_md.iommu_bus_setup(bus);
1281 list_for_each_entry(dev, &bus->devices, bus_list)
1282 ppc_md.iommu_dev_setup(dev);
1284 if (ppc_md.irq_bus_setup)
1285 ppc_md.irq_bus_setup(bus);
1288 void __devinit pcibios_fixup_bus(struct pci_bus *bus)
1290 struct pci_dev *dev = bus->self;
1292 if (dev && pci_probe_only &&
1293 (dev->class >> 8) == PCI_CLASS_BRIDGE_PCI) {
1294 /* This is a subordinate bridge */
1296 pci_read_bridge_bases(bus);
1297 pcibios_fixup_device_resources(dev, bus);
1302 if (!pci_probe_only)
1305 list_for_each_entry(dev, &bus->devices, bus_list)
1306 if ((dev->class >> 8) != PCI_CLASS_BRIDGE_PCI)
1307 pcibios_fixup_device_resources(dev, bus);
1309 EXPORT_SYMBOL(pcibios_fixup_bus);
1312 * Reads the interrupt pin to determine if interrupt is use by card.
1313 * If the interrupt is used, then gets the interrupt line from the
1314 * openfirmware and sets it in the pci_dev and pci_config line.
1316 int pci_read_irq_line(struct pci_dev *pci_dev)
1319 struct device_node *node;
1321 pci_read_config_byte(pci_dev, PCI_INTERRUPT_PIN, &intpin);
1325 node = pci_device_to_OF_node(pci_dev);
1329 if (node->n_intrs == 0)
1332 pci_dev->irq = node->intrs[0].line;
1334 pci_write_config_byte(pci_dev, PCI_INTERRUPT_LINE, pci_dev->irq);
1338 EXPORT_SYMBOL(pci_read_irq_line);
1340 void pci_resource_to_user(const struct pci_dev *dev, int bar,
1341 const struct resource *rsrc,
1342 u64 *start, u64 *end)
1344 struct pci_controller *hose = pci_bus_to_host(dev->bus);
1345 unsigned long offset = 0;
1350 if (rsrc->flags & IORESOURCE_IO)
1351 offset = pci_io_base - (unsigned long)hose->io_base_virt +
1354 *start = rsrc->start + offset;
1355 *end = rsrc->end + offset;
1358 struct pci_controller* pci_find_hose_for_OF_device(struct device_node* node)
1363 struct pci_controller *hose, *tmp;
1364 list_for_each_entry_safe(hose, tmp, &hose_list, list_node)
1365 if (hose->arch_data == node)
1367 node = node->parent;
1372 #endif /* CONFIG_PPC_MULTIPLATFORM */
1374 unsigned long pci_address_to_pio(phys_addr_t address)
1376 struct pci_controller *hose, *tmp;
1378 list_for_each_entry_safe(hose, tmp, &hose_list, list_node) {
1379 if (address >= hose->io_base_phys &&
1380 address < (hose->io_base_phys + hose->pci_io_size)) {
1381 unsigned long base =
1382 (unsigned long)hose->io_base_virt - pci_io_base;
1383 return base + (address - hose->io_base_phys);
1386 return (unsigned int)-1;
1388 EXPORT_SYMBOL_GPL(pci_address_to_pio);
1391 #define IOBASE_BRIDGE_NUMBER 0
1392 #define IOBASE_MEMORY 1
1394 #define IOBASE_ISA_IO 3
1395 #define IOBASE_ISA_MEM 4
1397 long sys_pciconfig_iobase(long which, unsigned long in_bus,
1398 unsigned long in_devfn)
1400 struct pci_controller* hose;
1401 struct list_head *ln;
1402 struct pci_bus *bus = NULL;
1403 struct device_node *hose_node;
1405 /* Argh ! Please forgive me for that hack, but that's the
1406 * simplest way to get existing XFree to not lockup on some
1407 * G5 machines... So when something asks for bus 0 io base
1408 * (bus 0 is HT root), we return the AGP one instead.
1410 if (machine_is_compatible("MacRISC4"))
1414 /* That syscall isn't quite compatible with PCI domains, but it's
1415 * used on pre-domains setup. We return the first match
1418 for (ln = pci_root_buses.next; ln != &pci_root_buses; ln = ln->next) {
1419 bus = pci_bus_b(ln);
1420 if (in_bus >= bus->number && in_bus < (bus->number + bus->subordinate))
1424 if (bus == NULL || bus->sysdata == NULL)
1427 hose_node = (struct device_node *)bus->sysdata;
1428 hose = PCI_DN(hose_node)->phb;
1431 case IOBASE_BRIDGE_NUMBER:
1432 return (long)hose->first_busno;
1434 return (long)hose->pci_mem_offset;
1436 return (long)hose->io_base_phys;
1438 return (long)isa_io_base;
1439 case IOBASE_ISA_MEM: