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...) udbg_printf(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);
58 /* pci_io_base -- the base address from which io bars are offsets.
59 * This is the lowest I/O base address (so bar values are always positive),
60 * and it *must* be the start of ISA space if an ISA bus exists because
61 * ISA drivers use hard coded offsets. If no ISA bus exists a dummy
62 * page is mapped and isa_io_limit prevents access to it.
64 unsigned long isa_io_base; /* NULL if no ISA bus */
65 EXPORT_SYMBOL(isa_io_base);
66 unsigned long pci_io_base;
67 EXPORT_SYMBOL(pci_io_base);
69 void iSeries_pcibios_init(void);
73 struct dma_mapping_ops pci_dma_ops;
74 EXPORT_SYMBOL(pci_dma_ops);
76 int global_phb_number; /* Global phb counter */
78 /* Cached ISA bridge dev. */
79 struct pci_dev *ppc64_isabridge_dev = NULL;
81 static void fixup_broken_pcnet32(struct pci_dev* dev)
83 if ((dev->class>>8 == PCI_CLASS_NETWORK_ETHERNET)) {
84 dev->vendor = PCI_VENDOR_ID_AMD;
85 pci_write_config_word(dev, PCI_VENDOR_ID, PCI_VENDOR_ID_AMD);
88 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_TRIDENT, PCI_ANY_ID, fixup_broken_pcnet32);
90 void pcibios_resource_to_bus(struct pci_dev *dev, struct pci_bus_region *region,
93 unsigned long offset = 0;
94 struct pci_controller *hose = pci_bus_to_host(dev->bus);
99 if (res->flags & IORESOURCE_IO)
100 offset = (unsigned long)hose->io_base_virt - pci_io_base;
102 if (res->flags & IORESOURCE_MEM)
103 offset = hose->pci_mem_offset;
105 region->start = res->start - offset;
106 region->end = res->end - offset;
109 void pcibios_bus_to_resource(struct pci_dev *dev, struct resource *res,
110 struct pci_bus_region *region)
112 unsigned long offset = 0;
113 struct pci_controller *hose = pci_bus_to_host(dev->bus);
118 if (res->flags & IORESOURCE_IO)
119 offset = (unsigned long)hose->io_base_virt - pci_io_base;
121 if (res->flags & IORESOURCE_MEM)
122 offset = hose->pci_mem_offset;
124 res->start = region->start + offset;
125 res->end = region->end + offset;
128 #ifdef CONFIG_HOTPLUG
129 EXPORT_SYMBOL(pcibios_resource_to_bus);
130 EXPORT_SYMBOL(pcibios_bus_to_resource);
134 * We need to avoid collisions with `mirrored' VGA ports
135 * and other strange ISA hardware, so we always want the
136 * addresses to be allocated in the 0x000-0x0ff region
139 * Why? Because some silly external IO cards only decode
140 * the low 10 bits of the IO address. The 0x00-0xff region
141 * is reserved for motherboard devices that decode all 16
142 * bits, so it's ok to allocate at, say, 0x2800-0x28ff,
143 * but we want to try to avoid allocating at 0x2900-0x2bff
144 * which might have be mirrored at 0x0100-0x03ff..
146 void pcibios_align_resource(void *data, struct resource *res,
147 unsigned long size, unsigned long align)
149 struct pci_dev *dev = data;
150 struct pci_controller *hose = pci_bus_to_host(dev->bus);
151 unsigned long start = res->start;
152 unsigned long alignto;
154 if (res->flags & IORESOURCE_IO) {
155 unsigned long offset = (unsigned long)hose->io_base_virt -
157 /* Make sure we start at our min on all hoses */
158 if (start - offset < PCIBIOS_MIN_IO)
159 start = PCIBIOS_MIN_IO + offset;
162 * Put everything into 0x00-0xff region modulo 0x400
165 start = (start + 0x3ff) & ~0x3ff;
167 } else if (res->flags & IORESOURCE_MEM) {
168 /* Make sure we start at our min on all hoses */
169 if (start - hose->pci_mem_offset < PCIBIOS_MIN_MEM)
170 start = PCIBIOS_MIN_MEM + hose->pci_mem_offset;
172 /* Align to multiple of size of minimum base. */
173 alignto = max(0x1000UL, align);
174 start = ALIGN(start, alignto);
180 static DEFINE_SPINLOCK(hose_spinlock);
183 * pci_controller(phb) initialized common variables.
185 static void __devinit pci_setup_pci_controller(struct pci_controller *hose)
187 memset(hose, 0, sizeof(struct pci_controller));
189 spin_lock(&hose_spinlock);
190 hose->global_number = global_phb_number++;
191 list_add_tail(&hose->list_node, &hose_list);
192 spin_unlock(&hose_spinlock);
195 static void add_linux_pci_domain(struct device_node *dev,
196 struct pci_controller *phb)
198 struct property *of_prop;
201 of_prop = (struct property *)
202 get_property(dev, "linux,pci-domain", &size);
205 WARN_ON(of_prop && size < sizeof(int));
206 if (of_prop && size < sizeof(int))
208 size = sizeof(struct property) + sizeof(int);
209 if (of_prop == NULL) {
211 of_prop = kmalloc(size, GFP_KERNEL);
213 of_prop = alloc_bootmem(size);
215 memset(of_prop, 0, sizeof(struct property));
216 of_prop->name = "linux,pci-domain";
217 of_prop->length = sizeof(int);
218 of_prop->value = (unsigned char *)&of_prop[1];
219 *((int *)of_prop->value) = phb->global_number;
220 prom_add_property(dev, of_prop);
223 struct pci_controller * pcibios_alloc_controller(struct device_node *dev)
225 struct pci_controller *phb;
228 phb = kmalloc(sizeof(struct pci_controller), GFP_KERNEL);
230 phb = alloc_bootmem(sizeof (struct pci_controller));
233 pci_setup_pci_controller(phb);
234 phb->arch_data = dev;
235 phb->is_dynamic = mem_init_done;
237 add_linux_pci_domain(dev, phb);
241 void pcibios_free_controller(struct pci_controller *phb)
243 if (phb->arch_data) {
244 struct device_node *np = phb->arch_data;
245 int *domain = (int *)get_property(np,
246 "linux,pci-domain", NULL);
254 static void __init pcibios_claim_one_bus(struct pci_bus *b)
257 struct pci_bus *child_bus;
259 list_for_each_entry(dev, &b->devices, bus_list) {
262 for (i = 0; i < PCI_NUM_RESOURCES; i++) {
263 struct resource *r = &dev->resource[i];
265 if (r->parent || !r->start || !r->flags)
267 pci_claim_resource(dev, i);
271 list_for_each_entry(child_bus, &b->children, node)
272 pcibios_claim_one_bus(child_bus);
275 #ifndef CONFIG_PPC_ISERIES
276 static void __init pcibios_claim_of_setup(void)
280 list_for_each_entry(b, &pci_root_buses, node)
281 pcibios_claim_one_bus(b);
285 #ifdef CONFIG_PPC_MULTIPLATFORM
286 static u32 get_int_prop(struct device_node *np, const char *name, u32 def)
291 prop = (u32 *) get_property(np, name, &len);
292 if (prop && len >= 4)
297 static unsigned int pci_parse_of_flags(u32 addr0)
299 unsigned int flags = 0;
301 if (addr0 & 0x02000000) {
302 flags = IORESOURCE_MEM | PCI_BASE_ADDRESS_SPACE_MEMORY;
303 flags |= (addr0 >> 22) & PCI_BASE_ADDRESS_MEM_TYPE_64;
304 flags |= (addr0 >> 28) & PCI_BASE_ADDRESS_MEM_TYPE_1M;
305 if (addr0 & 0x40000000)
306 flags |= IORESOURCE_PREFETCH
307 | PCI_BASE_ADDRESS_MEM_PREFETCH;
308 } else if (addr0 & 0x01000000)
309 flags = IORESOURCE_IO | PCI_BASE_ADDRESS_SPACE_IO;
313 #define GET_64BIT(prop, i) ((((u64) (prop)[(i)]) << 32) | (prop)[(i)+1])
315 static void pci_parse_of_addrs(struct device_node *node, struct pci_dev *dev)
319 struct resource *res;
323 addrs = (u32 *) get_property(node, "assigned-addresses", &proplen);
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 if (PCI_BASE_ADDRESS_0 <= i && i <= PCI_BASE_ADDRESS_5) {
336 res = &dev->resource[(i - PCI_BASE_ADDRESS_0) >> 2];
337 } else if (i == dev->rom_base_reg) {
338 res = &dev->resource[PCI_ROM_RESOURCE];
339 flags |= IORESOURCE_READONLY | IORESOURCE_CACHEABLE;
341 printk(KERN_ERR "PCI: bad cfg reg num 0x%x\n", i);
345 res->end = base + size - 1;
347 res->name = pci_name(dev);
348 fixup_resource(res, dev);
352 struct pci_dev *of_create_pci_dev(struct device_node *node,
353 struct pci_bus *bus, int devfn)
358 dev = kmalloc(sizeof(struct pci_dev), GFP_KERNEL);
361 type = get_property(node, "device_type", NULL);
365 memset(dev, 0, sizeof(struct pci_dev));
368 dev->dev.parent = bus->bridge;
369 dev->dev.bus = &pci_bus_type;
371 dev->multifunction = 0; /* maybe a lie? */
373 dev->vendor = get_int_prop(node, "vendor-id", 0xffff);
374 dev->device = get_int_prop(node, "device-id", 0xffff);
375 dev->subsystem_vendor = get_int_prop(node, "subsystem-vendor-id", 0);
376 dev->subsystem_device = get_int_prop(node, "subsystem-id", 0);
378 dev->cfg_size = 256; /*pci_cfg_space_size(dev);*/
380 sprintf(pci_name(dev), "%04x:%02x:%02x.%d", pci_domain_nr(bus),
381 dev->bus->number, PCI_SLOT(devfn), PCI_FUNC(devfn));
382 dev->class = get_int_prop(node, "class-code", 0);
384 dev->current_state = 4; /* unknown power state */
386 if (!strcmp(type, "pci")) {
387 /* a PCI-PCI bridge */
388 dev->hdr_type = PCI_HEADER_TYPE_BRIDGE;
389 dev->rom_base_reg = PCI_ROM_ADDRESS1;
390 } else if (!strcmp(type, "cardbus")) {
391 dev->hdr_type = PCI_HEADER_TYPE_CARDBUS;
393 dev->hdr_type = PCI_HEADER_TYPE_NORMAL;
394 dev->rom_base_reg = PCI_ROM_ADDRESS;
396 if (node->n_intrs > 0) {
397 dev->irq = node->intrs[0].line;
398 pci_write_config_byte(dev, PCI_INTERRUPT_LINE,
403 pci_parse_of_addrs(node, dev);
405 pci_device_add(dev, bus);
407 /* XXX pci_scan_msi_device(dev); */
411 EXPORT_SYMBOL(of_create_pci_dev);
413 void __devinit of_scan_bus(struct device_node *node,
416 struct device_node *child = NULL;
421 while ((child = of_get_next_child(node, child)) != NULL) {
422 reg = (u32 *) get_property(child, "reg", ®len);
423 if (reg == NULL || reglen < 20)
425 devfn = (reg[0] >> 8) & 0xff;
426 /* create a new pci_dev for this device */
427 dev = of_create_pci_dev(child, bus, devfn);
430 if (dev->hdr_type == PCI_HEADER_TYPE_BRIDGE ||
431 dev->hdr_type == PCI_HEADER_TYPE_CARDBUS)
432 of_scan_pci_bridge(child, dev);
437 EXPORT_SYMBOL(of_scan_bus);
439 void __devinit of_scan_pci_bridge(struct device_node *node,
443 u32 *busrange, *ranges;
445 struct resource *res;
449 /* parse bus-range property */
450 busrange = (u32 *) get_property(node, "bus-range", &len);
451 if (busrange == NULL || len != 8) {
452 printk(KERN_ERR "Can't get bus-range for PCI-PCI bridge %s\n",
456 ranges = (u32 *) get_property(node, "ranges", &len);
457 if (ranges == NULL) {
458 printk(KERN_ERR "Can't get ranges for PCI-PCI bridge %s\n",
463 bus = pci_add_new_bus(dev->bus, dev, busrange[0]);
465 printk(KERN_ERR "Failed to create pci bus for %s\n",
470 bus->primary = dev->bus->number;
471 bus->subordinate = busrange[1];
475 /* parse ranges property */
476 /* PCI #address-cells == 3 and #size-cells == 2 always */
477 res = &dev->resource[PCI_BRIDGE_RESOURCES];
478 for (i = 0; i < PCI_NUM_RESOURCES - PCI_BRIDGE_RESOURCES; ++i) {
480 bus->resource[i] = res;
484 for (; len >= 32; len -= 32, ranges += 8) {
485 flags = pci_parse_of_flags(ranges[0]);
486 size = GET_64BIT(ranges, 6);
487 if (flags == 0 || size == 0)
489 if (flags & IORESOURCE_IO) {
490 res = bus->resource[0];
492 printk(KERN_ERR "PCI: ignoring extra I/O range"
493 " for bridge %s\n", node->full_name);
497 if (i >= PCI_NUM_RESOURCES - PCI_BRIDGE_RESOURCES) {
498 printk(KERN_ERR "PCI: too many memory ranges"
499 " for bridge %s\n", node->full_name);
502 res = bus->resource[i];
505 res->start = GET_64BIT(ranges, 1);
506 res->end = res->start + size - 1;
508 fixup_resource(res, dev);
510 sprintf(bus->name, "PCI Bus %04x:%02x", pci_domain_nr(bus),
513 mode = PCI_PROBE_NORMAL;
514 if (ppc_md.pci_probe_mode)
515 mode = ppc_md.pci_probe_mode(bus);
516 if (mode == PCI_PROBE_DEVTREE)
517 of_scan_bus(node, bus);
518 else if (mode == PCI_PROBE_NORMAL)
519 pci_scan_child_bus(bus);
521 EXPORT_SYMBOL(of_scan_pci_bridge);
522 #endif /* CONFIG_PPC_MULTIPLATFORM */
524 void __devinit scan_phb(struct pci_controller *hose)
527 struct device_node *node = hose->arch_data;
529 struct resource *res;
531 bus = pci_create_bus(NULL, hose->first_busno, hose->ops, node);
533 printk(KERN_ERR "Failed to create bus for PCI domain %04x\n",
534 hose->global_number);
537 bus->secondary = hose->first_busno;
540 bus->resource[0] = res = &hose->io_resource;
541 if (res->flags && request_resource(&ioport_resource, res))
542 printk(KERN_ERR "Failed to request PCI IO region "
543 "on PCI domain %04x\n", hose->global_number);
545 for (i = 0; i < 3; ++i) {
546 res = &hose->mem_resources[i];
547 bus->resource[i+1] = res;
548 if (res->flags && request_resource(&iomem_resource, res))
549 printk(KERN_ERR "Failed to request PCI memory region "
550 "on PCI domain %04x\n", hose->global_number);
553 mode = PCI_PROBE_NORMAL;
554 #ifdef CONFIG_PPC_MULTIPLATFORM
555 if (ppc_md.pci_probe_mode)
556 mode = ppc_md.pci_probe_mode(bus);
557 if (mode == PCI_PROBE_DEVTREE) {
558 bus->subordinate = hose->last_busno;
559 of_scan_bus(node, bus);
561 #endif /* CONFIG_PPC_MULTIPLATFORM */
562 if (mode == PCI_PROBE_NORMAL)
563 hose->last_busno = bus->subordinate = pci_scan_child_bus(bus);
564 pci_bus_add_devices(bus);
567 static int __init pcibios_init(void)
569 struct pci_controller *hose, *tmp;
571 /* For now, override phys_mem_access_prot. If we need it,
572 * later, we may move that initialization to each ppc_md
574 ppc_md.phys_mem_access_prot = pci_phys_mem_access_prot;
576 #ifdef CONFIG_PPC_ISERIES
577 iSeries_pcibios_init();
580 printk("PCI: Probing PCI hardware\n");
582 /* Scan all of the recorded PCI controllers. */
583 list_for_each_entry_safe(hose, tmp, &hose_list, list_node)
586 #ifndef CONFIG_PPC_ISERIES
588 pcibios_claim_of_setup();
590 /* FIXME: `else' will be removed when
591 pci_assign_unassigned_resources() is able to work
592 correctly with [partially] allocated PCI tree. */
593 pci_assign_unassigned_resources();
594 #endif /* !CONFIG_PPC_ISERIES */
596 /* Call machine dependent final fixup */
597 if (ppc_md.pcibios_fixup)
598 ppc_md.pcibios_fixup();
600 /* Cache the location of the ISA bridge (if we have one) */
601 ppc64_isabridge_dev = pci_get_class(PCI_CLASS_BRIDGE_ISA << 8, NULL);
602 if (ppc64_isabridge_dev != NULL)
603 printk("ISA bridge at %s\n", pci_name(ppc64_isabridge_dev));
605 #ifdef CONFIG_PPC_MULTIPLATFORM
606 /* map in PCI I/O space */
610 printk("PCI: Probing PCI hardware done\n");
615 subsys_initcall(pcibios_init);
617 char __init *pcibios_setup(char *str)
622 int pcibios_enable_device(struct pci_dev *dev, int mask)
627 pci_read_config_word(dev, PCI_COMMAND, &cmd);
630 for (i = 0; i < PCI_NUM_RESOURCES; i++) {
631 struct resource *res = &dev->resource[i];
633 /* Only set up the requested stuff */
634 if (!(mask & (1<<i)))
637 if (res->flags & IORESOURCE_IO)
638 cmd |= PCI_COMMAND_IO;
639 if (res->flags & IORESOURCE_MEM)
640 cmd |= PCI_COMMAND_MEMORY;
644 printk(KERN_DEBUG "PCI: Enabling device: (%s), cmd %x\n",
646 /* Enable the appropriate bits in the PCI command register. */
647 pci_write_config_word(dev, PCI_COMMAND, cmd);
653 * Return the domain number for this bus.
655 int pci_domain_nr(struct pci_bus *bus)
657 #ifdef CONFIG_PPC_ISERIES
660 struct pci_controller *hose = pci_bus_to_host(bus);
662 return hose->global_number;
666 EXPORT_SYMBOL(pci_domain_nr);
668 /* Decide whether to display the domain number in /proc */
669 int pci_proc_domain(struct pci_bus *bus)
671 #ifdef CONFIG_PPC_ISERIES
674 struct pci_controller *hose = pci_bus_to_host(bus);
680 * Platform support for /proc/bus/pci/X/Y mmap()s,
681 * modelled on the sparc64 implementation by Dave Miller.
686 * Adjust vm_pgoff of VMA such that it is the physical page offset
687 * corresponding to the 32-bit pci bus offset for DEV requested by the user.
689 * Basically, the user finds the base address for his device which he wishes
690 * to mmap. They read the 32-bit value from the config space base register,
691 * add whatever PAGE_SIZE multiple offset they wish, and feed this into the
692 * offset parameter of mmap on /proc/bus/pci/XXX for that device.
694 * Returns negative error code on failure, zero on success.
696 static struct resource *__pci_mmap_make_offset(struct pci_dev *dev,
697 unsigned long *offset,
698 enum pci_mmap_state mmap_state)
700 struct pci_controller *hose = pci_bus_to_host(dev->bus);
701 unsigned long io_offset = 0;
705 return NULL; /* should never happen */
707 /* If memory, add on the PCI bridge address offset */
708 if (mmap_state == pci_mmap_mem) {
709 *offset += hose->pci_mem_offset;
710 res_bit = IORESOURCE_MEM;
712 io_offset = (unsigned long)hose->io_base_virt - pci_io_base;
713 *offset += io_offset;
714 res_bit = IORESOURCE_IO;
718 * Check that the offset requested corresponds to one of the
719 * resources of the device.
721 for (i = 0; i <= PCI_ROM_RESOURCE; i++) {
722 struct resource *rp = &dev->resource[i];
723 int flags = rp->flags;
725 /* treat ROM as memory (should be already) */
726 if (i == PCI_ROM_RESOURCE)
727 flags |= IORESOURCE_MEM;
729 /* Active and same type? */
730 if ((flags & res_bit) == 0)
733 /* In the range of this resource? */
734 if (*offset < (rp->start & PAGE_MASK) || *offset > rp->end)
737 /* found it! construct the final physical address */
738 if (mmap_state == pci_mmap_io)
739 *offset += hose->io_base_phys - io_offset;
747 * Set vm_page_prot of VMA, as appropriate for this architecture, for a pci
750 static pgprot_t __pci_mmap_set_pgprot(struct pci_dev *dev, struct resource *rp,
752 enum pci_mmap_state mmap_state,
755 unsigned long prot = pgprot_val(protection);
757 /* Write combine is always 0 on non-memory space mappings. On
758 * memory space, if the user didn't pass 1, we check for a
759 * "prefetchable" resource. This is a bit hackish, but we use
760 * this to workaround the inability of /sysfs to provide a write
763 if (mmap_state != pci_mmap_mem)
765 else if (write_combine == 0) {
766 if (rp->flags & IORESOURCE_PREFETCH)
770 /* XXX would be nice to have a way to ask for write-through */
771 prot |= _PAGE_NO_CACHE;
773 prot &= ~_PAGE_GUARDED;
775 prot |= _PAGE_GUARDED;
777 printk("PCI map for %s:%lx, prot: %lx\n", pci_name(dev), rp->start,
780 return __pgprot(prot);
784 * This one is used by /dev/mem and fbdev who have no clue about the
785 * PCI device, it tries to find the PCI device first and calls the
788 pgprot_t pci_phys_mem_access_prot(struct file *file,
793 struct pci_dev *pdev = NULL;
794 struct resource *found = NULL;
795 unsigned long prot = pgprot_val(protection);
796 unsigned long offset = pfn << PAGE_SHIFT;
799 if (page_is_ram(pfn))
800 return __pgprot(prot);
802 prot |= _PAGE_NO_CACHE | _PAGE_GUARDED;
804 for_each_pci_dev(pdev) {
805 for (i = 0; i <= PCI_ROM_RESOURCE; i++) {
806 struct resource *rp = &pdev->resource[i];
807 int flags = rp->flags;
809 /* Active and same type? */
810 if ((flags & IORESOURCE_MEM) == 0)
812 /* In the range of this resource? */
813 if (offset < (rp->start & PAGE_MASK) ||
823 if (found->flags & IORESOURCE_PREFETCH)
824 prot &= ~_PAGE_GUARDED;
828 DBG("non-PCI map for %lx, prot: %lx\n", offset, prot);
830 return __pgprot(prot);
835 * Perform the actual remap of the pages for a PCI device mapping, as
836 * appropriate for this architecture. The region in the process to map
837 * is described by vm_start and vm_end members of VMA, the base physical
838 * address is found in vm_pgoff.
839 * The pci device structure is provided so that architectures may make mapping
840 * decisions on a per-device or per-bus basis.
842 * Returns a negative error code on failure, zero on success.
844 int pci_mmap_page_range(struct pci_dev *dev, struct vm_area_struct *vma,
845 enum pci_mmap_state mmap_state,
848 unsigned long offset = vma->vm_pgoff << PAGE_SHIFT;
852 rp = __pci_mmap_make_offset(dev, &offset, mmap_state);
856 vma->vm_pgoff = offset >> PAGE_SHIFT;
857 vma->vm_flags |= VM_SHM | VM_LOCKED | VM_IO;
858 vma->vm_page_prot = __pci_mmap_set_pgprot(dev, rp,
860 mmap_state, write_combine);
862 ret = remap_pfn_range(vma, vma->vm_start, vma->vm_pgoff,
863 vma->vm_end - vma->vm_start, vma->vm_page_prot);
868 #ifdef CONFIG_PPC_MULTIPLATFORM
869 static ssize_t pci_show_devspec(struct device *dev, struct device_attribute *attr, char *buf)
871 struct pci_dev *pdev;
872 struct device_node *np;
874 pdev = to_pci_dev (dev);
875 np = pci_device_to_OF_node(pdev);
876 if (np == NULL || np->full_name == NULL)
878 return sprintf(buf, "%s", np->full_name);
880 static DEVICE_ATTR(devspec, S_IRUGO, pci_show_devspec, NULL);
881 #endif /* CONFIG_PPC_MULTIPLATFORM */
883 void pcibios_add_platform_entries(struct pci_dev *pdev)
885 #ifdef CONFIG_PPC_MULTIPLATFORM
886 device_create_file(&pdev->dev, &dev_attr_devspec);
887 #endif /* CONFIG_PPC_MULTIPLATFORM */
890 #ifdef CONFIG_PPC_MULTIPLATFORM
892 #define ISA_SPACE_MASK 0x1
893 #define ISA_SPACE_IO 0x1
895 static void __devinit pci_process_ISA_OF_ranges(struct device_node *isa_node,
896 unsigned long phb_io_base_phys,
897 void __iomem * phb_io_base_virt)
899 struct isa_range *range;
900 unsigned long pci_addr;
901 unsigned int isa_addr;
905 range = (struct isa_range *) get_property(isa_node, "ranges", &rlen);
906 if (range == NULL || (rlen < sizeof(struct isa_range))) {
907 printk(KERN_ERR "no ISA ranges or unexpected isa range size,"
909 __ioremap_explicit(phb_io_base_phys,
910 (unsigned long)phb_io_base_virt,
911 0x10000, _PAGE_NO_CACHE | _PAGE_GUARDED);
915 /* From "ISA Binding to 1275"
916 * The ranges property is laid out as an array of elements,
917 * each of which comprises:
918 * cells 0 - 1: an ISA address
919 * cells 2 - 4: a PCI address
920 * (size depending on dev->n_addr_cells)
921 * cell 5: the size of the range
923 if ((range->isa_addr.a_hi && ISA_SPACE_MASK) == ISA_SPACE_IO) {
924 isa_addr = range->isa_addr.a_lo;
925 pci_addr = (unsigned long) range->pci_addr.a_mid << 32 |
926 range->pci_addr.a_lo;
928 /* Assume these are both zero */
929 if ((pci_addr != 0) || (isa_addr != 0)) {
930 printk(KERN_ERR "unexpected isa to pci mapping: %s\n",
935 size = PAGE_ALIGN(range->size);
937 __ioremap_explicit(phb_io_base_phys,
938 (unsigned long) phb_io_base_virt,
939 size, _PAGE_NO_CACHE | _PAGE_GUARDED);
943 void __devinit pci_process_bridge_OF_ranges(struct pci_controller *hose,
944 struct device_node *dev, int prim)
946 unsigned int *ranges, pci_space;
950 struct resource *res;
951 int np, na = prom_n_addr_cells(dev);
952 unsigned long pci_addr, cpu_phys_addr;
956 /* From "PCI Binding to 1275"
957 * The ranges property is laid out as an array of elements,
958 * each of which comprises:
959 * cells 0 - 2: a PCI address
960 * cells 3 or 3+4: a CPU physical address
961 * (size depending on dev->n_addr_cells)
962 * cells 4+5 or 5+6: the size of the range
964 ranges = (unsigned int *) get_property(dev, "ranges", &rlen);
967 hose->io_base_phys = 0;
968 while ((rlen -= np * sizeof(unsigned int)) >= 0) {
970 pci_space = ranges[0];
971 pci_addr = ((unsigned long)ranges[1] << 32) | ranges[2];
973 cpu_phys_addr = ranges[3];
975 cpu_phys_addr = (cpu_phys_addr << 32) | ranges[4];
977 size = ((unsigned long)ranges[na+3] << 32) | ranges[na+4];
982 /* Now consume following elements while they are contiguous */
983 while (rlen >= np * sizeof(unsigned int)) {
984 unsigned long addr, phys;
986 if (ranges[0] != pci_space)
988 addr = ((unsigned long)ranges[1] << 32) | ranges[2];
991 phys = (phys << 32) | ranges[4];
992 if (addr != pci_addr + size ||
993 phys != cpu_phys_addr + size)
996 size += ((unsigned long)ranges[na+3] << 32)
999 rlen -= np * sizeof(unsigned int);
1002 switch ((pci_space >> 24) & 0x3) {
1003 case 1: /* I/O space */
1004 hose->io_base_phys = cpu_phys_addr;
1005 hose->pci_io_size = size;
1007 res = &hose->io_resource;
1008 res->flags = IORESOURCE_IO;
1009 res->start = pci_addr;
1010 DBG("phb%d: IO 0x%lx -> 0x%lx\n", hose->global_number,
1011 res->start, res->start + size - 1);
1013 case 2: /* memory space */
1015 while (memno < 3 && hose->mem_resources[memno].flags)
1019 hose->pci_mem_offset = cpu_phys_addr - pci_addr;
1021 res = &hose->mem_resources[memno];
1022 res->flags = IORESOURCE_MEM;
1023 res->start = cpu_phys_addr;
1024 DBG("phb%d: MEM 0x%lx -> 0x%lx\n", hose->global_number,
1025 res->start, res->start + size - 1);
1030 res->name = dev->full_name;
1031 res->end = res->start + size - 1;
1033 res->sibling = NULL;
1039 void __init pci_setup_phb_io(struct pci_controller *hose, int primary)
1041 unsigned long size = hose->pci_io_size;
1042 unsigned long io_virt_offset;
1043 struct resource *res;
1044 struct device_node *isa_dn;
1046 hose->io_base_virt = reserve_phb_iospace(size);
1047 DBG("phb%d io_base_phys 0x%lx io_base_virt 0x%lx\n",
1048 hose->global_number, hose->io_base_phys,
1049 (unsigned long) hose->io_base_virt);
1052 pci_io_base = (unsigned long)hose->io_base_virt;
1053 isa_dn = of_find_node_by_type(NULL, "isa");
1055 isa_io_base = pci_io_base;
1056 pci_process_ISA_OF_ranges(isa_dn, hose->io_base_phys,
1057 hose->io_base_virt);
1058 of_node_put(isa_dn);
1064 io_virt_offset = (unsigned long)hose->io_base_virt - pci_io_base;
1065 res = &hose->io_resource;
1066 res->start += io_virt_offset;
1067 res->end += io_virt_offset;
1070 void __devinit pci_setup_phb_io_dynamic(struct pci_controller *hose,
1073 unsigned long size = hose->pci_io_size;
1074 unsigned long io_virt_offset;
1075 struct resource *res;
1077 hose->io_base_virt = __ioremap(hose->io_base_phys, size,
1078 _PAGE_NO_CACHE | _PAGE_GUARDED);
1079 DBG("phb%d io_base_phys 0x%lx io_base_virt 0x%lx\n",
1080 hose->global_number, hose->io_base_phys,
1081 (unsigned long) hose->io_base_virt);
1084 pci_io_base = (unsigned long)hose->io_base_virt;
1086 io_virt_offset = (unsigned long)hose->io_base_virt - pci_io_base;
1087 res = &hose->io_resource;
1088 res->start += io_virt_offset;
1089 res->end += io_virt_offset;
1093 static int get_bus_io_range(struct pci_bus *bus, unsigned long *start_phys,
1094 unsigned long *start_virt, unsigned long *size)
1096 struct pci_controller *hose = pci_bus_to_host(bus);
1097 struct pci_bus_region region;
1098 struct resource *res;
1101 res = bus->resource[0];
1102 pcibios_resource_to_bus(bus->self, ®ion, res);
1103 *start_phys = hose->io_base_phys + region.start;
1104 *start_virt = (unsigned long) hose->io_base_virt +
1106 if (region.end > region.start)
1107 *size = region.end - region.start + 1;
1109 printk("%s(): unexpected region 0x%lx->0x%lx\n",
1110 __FUNCTION__, region.start, region.end);
1116 res = &hose->io_resource;
1117 *start_phys = hose->io_base_phys;
1118 *start_virt = (unsigned long) hose->io_base_virt;
1119 if (res->end > res->start)
1120 *size = res->end - res->start + 1;
1122 printk("%s(): unexpected region 0x%lx->0x%lx\n",
1123 __FUNCTION__, res->start, res->end);
1131 int unmap_bus_range(struct pci_bus *bus)
1133 unsigned long start_phys;
1134 unsigned long start_virt;
1138 printk(KERN_ERR "%s() expected bus\n", __FUNCTION__);
1142 if (get_bus_io_range(bus, &start_phys, &start_virt, &size))
1144 if (iounmap_explicit((void __iomem *) start_virt, size))
1149 EXPORT_SYMBOL(unmap_bus_range);
1151 int remap_bus_range(struct pci_bus *bus)
1153 unsigned long start_phys;
1154 unsigned long start_virt;
1158 printk(KERN_ERR "%s() expected bus\n", __FUNCTION__);
1163 if (get_bus_io_range(bus, &start_phys, &start_virt, &size))
1165 if (start_phys == 0)
1167 printk("mapping IO %lx -> %lx, size: %lx\n", start_phys, start_virt, size);
1168 if (__ioremap_explicit(start_phys, start_virt, size,
1169 _PAGE_NO_CACHE | _PAGE_GUARDED))
1174 EXPORT_SYMBOL(remap_bus_range);
1176 void phbs_remap_io(void)
1178 struct pci_controller *hose, *tmp;
1180 list_for_each_entry_safe(hose, tmp, &hose_list, list_node)
1181 remap_bus_range(hose->bus);
1184 static void __devinit fixup_resource(struct resource *res, struct pci_dev *dev)
1186 struct pci_controller *hose = pci_bus_to_host(dev->bus);
1187 unsigned long start, end, mask, offset;
1189 if (res->flags & IORESOURCE_IO) {
1190 offset = (unsigned long)hose->io_base_virt - pci_io_base;
1192 start = res->start += offset;
1193 end = res->end += offset;
1195 /* Need to allow IO access to pages that are in the
1197 if (start < MAX_ISA_PORT) {
1198 if (end > MAX_ISA_PORT)
1201 start >>= PAGE_SHIFT;
1204 /* get the range of pages for the map */
1205 mask = ((1 << (end+1)) - 1) ^ ((1 << start) - 1);
1206 io_page_mask |= mask;
1208 } else if (res->flags & IORESOURCE_MEM) {
1209 res->start += hose->pci_mem_offset;
1210 res->end += hose->pci_mem_offset;
1214 void __devinit pcibios_fixup_device_resources(struct pci_dev *dev,
1215 struct pci_bus *bus)
1217 /* Update device resources. */
1220 for (i = 0; i < PCI_NUM_RESOURCES; i++)
1221 if (dev->resource[i].flags)
1222 fixup_resource(&dev->resource[i], dev);
1224 EXPORT_SYMBOL(pcibios_fixup_device_resources);
1226 static void __devinit do_bus_setup(struct pci_bus *bus)
1228 struct pci_dev *dev;
1230 ppc_md.iommu_bus_setup(bus);
1232 list_for_each_entry(dev, &bus->devices, bus_list)
1233 ppc_md.iommu_dev_setup(dev);
1235 if (ppc_md.irq_bus_setup)
1236 ppc_md.irq_bus_setup(bus);
1239 void __devinit pcibios_fixup_bus(struct pci_bus *bus)
1241 struct pci_dev *dev = bus->self;
1243 if (dev && pci_probe_only &&
1244 (dev->class >> 8) == PCI_CLASS_BRIDGE_PCI) {
1245 /* This is a subordinate bridge */
1247 pci_read_bridge_bases(bus);
1248 pcibios_fixup_device_resources(dev, bus);
1253 if (!pci_probe_only)
1256 list_for_each_entry(dev, &bus->devices, bus_list)
1257 if ((dev->class >> 8) != PCI_CLASS_BRIDGE_PCI)
1258 pcibios_fixup_device_resources(dev, bus);
1260 EXPORT_SYMBOL(pcibios_fixup_bus);
1263 * Reads the interrupt pin to determine if interrupt is use by card.
1264 * If the interrupt is used, then gets the interrupt line from the
1265 * openfirmware and sets it in the pci_dev and pci_config line.
1267 int pci_read_irq_line(struct pci_dev *pci_dev)
1270 struct device_node *node;
1272 pci_read_config_byte(pci_dev, PCI_INTERRUPT_PIN, &intpin);
1276 node = pci_device_to_OF_node(pci_dev);
1280 if (node->n_intrs == 0)
1283 pci_dev->irq = node->intrs[0].line;
1285 pci_write_config_byte(pci_dev, PCI_INTERRUPT_LINE, pci_dev->irq);
1289 EXPORT_SYMBOL(pci_read_irq_line);
1291 void pci_resource_to_user(const struct pci_dev *dev, int bar,
1292 const struct resource *rsrc,
1293 u64 *start, u64 *end)
1295 struct pci_controller *hose = pci_bus_to_host(dev->bus);
1296 unsigned long offset = 0;
1301 if (rsrc->flags & IORESOURCE_IO)
1302 offset = pci_io_base - (unsigned long)hose->io_base_virt +
1305 *start = rsrc->start + offset;
1306 *end = rsrc->end + offset;
1309 #endif /* CONFIG_PPC_MULTIPLATFORM */
1312 #define IOBASE_BRIDGE_NUMBER 0
1313 #define IOBASE_MEMORY 1
1315 #define IOBASE_ISA_IO 3
1316 #define IOBASE_ISA_MEM 4
1318 long sys_pciconfig_iobase(long which, unsigned long in_bus,
1319 unsigned long in_devfn)
1321 struct pci_controller* hose;
1322 struct list_head *ln;
1323 struct pci_bus *bus = NULL;
1324 struct device_node *hose_node;
1326 /* Argh ! Please forgive me for that hack, but that's the
1327 * simplest way to get existing XFree to not lockup on some
1328 * G5 machines... So when something asks for bus 0 io base
1329 * (bus 0 is HT root), we return the AGP one instead.
1331 if (machine_is_compatible("MacRISC4"))
1335 /* That syscall isn't quite compatible with PCI domains, but it's
1336 * used on pre-domains setup. We return the first match
1339 for (ln = pci_root_buses.next; ln != &pci_root_buses; ln = ln->next) {
1340 bus = pci_bus_b(ln);
1341 if (in_bus >= bus->number && in_bus < (bus->number + bus->subordinate))
1345 if (bus == NULL || bus->sysdata == NULL)
1348 hose_node = (struct device_node *)bus->sysdata;
1349 hose = PCI_DN(hose_node)->phb;
1352 case IOBASE_BRIDGE_NUMBER:
1353 return (long)hose->first_busno;
1355 return (long)hose->pci_mem_offset;
1357 return (long)hose->io_base_phys;
1359 return (long)isa_io_base;
1360 case IOBASE_ISA_MEM: