xref: /linux/arch/powerpc/kernel/pci_64.c (revision 44ef339073f67d4abcc62ae52a5fbc069d7a4d29)
17568cb4eSPaul Mackerras /*
27568cb4eSPaul Mackerras  * Port for PPC64 David Engebretsen, IBM Corp.
37568cb4eSPaul Mackerras  * Contains common pci routines for ppc64 platform, pSeries and iSeries brands.
47568cb4eSPaul Mackerras  *
57568cb4eSPaul Mackerras  * Copyright (C) 2003 Anton Blanchard <anton@au.ibm.com>, IBM
67568cb4eSPaul Mackerras  *   Rework, based on alpha PCI code.
77568cb4eSPaul Mackerras  *
87568cb4eSPaul Mackerras  *      This program is free software; you can redistribute it and/or
97568cb4eSPaul Mackerras  *      modify it under the terms of the GNU General Public License
107568cb4eSPaul Mackerras  *      as published by the Free Software Foundation; either version
117568cb4eSPaul Mackerras  *      2 of the License, or (at your option) any later version.
127568cb4eSPaul Mackerras  */
137568cb4eSPaul Mackerras 
147568cb4eSPaul Mackerras #undef DEBUG
157568cb4eSPaul Mackerras 
167568cb4eSPaul Mackerras #include <linux/kernel.h>
177568cb4eSPaul Mackerras #include <linux/pci.h>
187568cb4eSPaul Mackerras #include <linux/string.h>
197568cb4eSPaul Mackerras #include <linux/init.h>
207568cb4eSPaul Mackerras #include <linux/bootmem.h>
217568cb4eSPaul Mackerras #include <linux/mm.h>
227568cb4eSPaul Mackerras #include <linux/list.h>
237568cb4eSPaul Mackerras #include <linux/syscalls.h>
246e99e458SBenjamin Herrenschmidt #include <linux/irq.h>
253d5134eeSBenjamin Herrenschmidt #include <linux/vmalloc.h>
267568cb4eSPaul Mackerras 
277568cb4eSPaul Mackerras #include <asm/processor.h>
287568cb4eSPaul Mackerras #include <asm/io.h>
297568cb4eSPaul Mackerras #include <asm/prom.h>
307568cb4eSPaul Mackerras #include <asm/pci-bridge.h>
317568cb4eSPaul Mackerras #include <asm/byteorder.h>
327568cb4eSPaul Mackerras #include <asm/machdep.h>
337568cb4eSPaul Mackerras #include <asm/ppc-pci.h>
347568cb4eSPaul Mackerras 
357568cb4eSPaul Mackerras #ifdef DEBUG
36f9e4ec57SMichael Ellerman #include <asm/udbg.h>
371beb6a7dSBenjamin Herrenschmidt #define DBG(fmt...) printk(fmt)
387568cb4eSPaul Mackerras #else
397568cb4eSPaul Mackerras #define DBG(fmt...)
407568cb4eSPaul Mackerras #endif
417568cb4eSPaul Mackerras 
427568cb4eSPaul Mackerras unsigned long pci_probe_only = 1;
43f8ef2705SPaul Mackerras int pci_assign_all_buses = 0;
447568cb4eSPaul Mackerras 
457568cb4eSPaul Mackerras static void fixup_resource(struct resource *res, struct pci_dev *dev);
467568cb4eSPaul Mackerras static void do_bus_setup(struct pci_bus *bus);
477568cb4eSPaul Mackerras 
487568cb4eSPaul Mackerras /* pci_io_base -- the base address from which io bars are offsets.
497568cb4eSPaul Mackerras  * This is the lowest I/O base address (so bar values are always positive),
507568cb4eSPaul Mackerras  * and it *must* be the start of ISA space if an ISA bus exists because
513d5134eeSBenjamin Herrenschmidt  * ISA drivers use hard coded offsets.  If no ISA bus exists nothing
523d5134eeSBenjamin Herrenschmidt  * is mapped on the first 64K of IO space
537568cb4eSPaul Mackerras  */
543d5134eeSBenjamin Herrenschmidt unsigned long pci_io_base = ISA_IO_BASE;
557568cb4eSPaul Mackerras EXPORT_SYMBOL(pci_io_base);
567568cb4eSPaul Mackerras 
577568cb4eSPaul Mackerras LIST_HEAD(hose_list);
587568cb4eSPaul Mackerras 
5957190708SStephen Rothwell static struct dma_mapping_ops *pci_dma_ops;
607568cb4eSPaul Mackerras 
6198747770SStephen Rothwell void set_pci_dma_ops(struct dma_mapping_ops *dma_ops)
6298747770SStephen Rothwell {
6398747770SStephen Rothwell 	pci_dma_ops = dma_ops;
6498747770SStephen Rothwell }
6598747770SStephen Rothwell 
6657190708SStephen Rothwell struct dma_mapping_ops *get_pci_dma_ops(void)
6757190708SStephen Rothwell {
6857190708SStephen Rothwell 	return pci_dma_ops;
6957190708SStephen Rothwell }
7057190708SStephen Rothwell EXPORT_SYMBOL(get_pci_dma_ops);
7157190708SStephen Rothwell 
727568cb4eSPaul Mackerras static void fixup_broken_pcnet32(struct pci_dev* dev)
737568cb4eSPaul Mackerras {
747568cb4eSPaul Mackerras 	if ((dev->class>>8 == PCI_CLASS_NETWORK_ETHERNET)) {
757568cb4eSPaul Mackerras 		dev->vendor = PCI_VENDOR_ID_AMD;
767568cb4eSPaul Mackerras 		pci_write_config_word(dev, PCI_VENDOR_ID, PCI_VENDOR_ID_AMD);
777568cb4eSPaul Mackerras 	}
787568cb4eSPaul Mackerras }
797568cb4eSPaul Mackerras DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_TRIDENT, PCI_ANY_ID, fixup_broken_pcnet32);
807568cb4eSPaul Mackerras 
817568cb4eSPaul Mackerras void  pcibios_resource_to_bus(struct pci_dev *dev, struct pci_bus_region *region,
827568cb4eSPaul Mackerras 			      struct resource *res)
837568cb4eSPaul Mackerras {
847568cb4eSPaul Mackerras 	unsigned long offset = 0;
857568cb4eSPaul Mackerras 	struct pci_controller *hose = pci_bus_to_host(dev->bus);
867568cb4eSPaul Mackerras 
877568cb4eSPaul Mackerras 	if (!hose)
887568cb4eSPaul Mackerras 		return;
897568cb4eSPaul Mackerras 
907568cb4eSPaul Mackerras 	if (res->flags & IORESOURCE_IO)
913d5134eeSBenjamin Herrenschmidt 	        offset = (unsigned long)hose->io_base_virt - _IO_BASE;
927568cb4eSPaul Mackerras 
937568cb4eSPaul Mackerras 	if (res->flags & IORESOURCE_MEM)
947568cb4eSPaul Mackerras 		offset = hose->pci_mem_offset;
957568cb4eSPaul Mackerras 
967568cb4eSPaul Mackerras 	region->start = res->start - offset;
977568cb4eSPaul Mackerras 	region->end = res->end - offset;
987568cb4eSPaul Mackerras }
997568cb4eSPaul Mackerras 
1007568cb4eSPaul Mackerras void pcibios_bus_to_resource(struct pci_dev *dev, struct resource *res,
1017568cb4eSPaul Mackerras 			      struct pci_bus_region *region)
1027568cb4eSPaul Mackerras {
1037568cb4eSPaul Mackerras 	unsigned long offset = 0;
1047568cb4eSPaul Mackerras 	struct pci_controller *hose = pci_bus_to_host(dev->bus);
1057568cb4eSPaul Mackerras 
1067568cb4eSPaul Mackerras 	if (!hose)
1077568cb4eSPaul Mackerras 		return;
1087568cb4eSPaul Mackerras 
1097568cb4eSPaul Mackerras 	if (res->flags & IORESOURCE_IO)
1103d5134eeSBenjamin Herrenschmidt 	        offset = (unsigned long)hose->io_base_virt - _IO_BASE;
1117568cb4eSPaul Mackerras 
1127568cb4eSPaul Mackerras 	if (res->flags & IORESOURCE_MEM)
1137568cb4eSPaul Mackerras 		offset = hose->pci_mem_offset;
1147568cb4eSPaul Mackerras 
1157568cb4eSPaul Mackerras 	res->start = region->start + offset;
1167568cb4eSPaul Mackerras 	res->end = region->end + offset;
1177568cb4eSPaul Mackerras }
1187568cb4eSPaul Mackerras 
1197568cb4eSPaul Mackerras #ifdef CONFIG_HOTPLUG
1207568cb4eSPaul Mackerras EXPORT_SYMBOL(pcibios_resource_to_bus);
1217568cb4eSPaul Mackerras EXPORT_SYMBOL(pcibios_bus_to_resource);
1227568cb4eSPaul Mackerras #endif
1237568cb4eSPaul Mackerras 
1247568cb4eSPaul Mackerras /*
1257568cb4eSPaul Mackerras  * We need to avoid collisions with `mirrored' VGA ports
1267568cb4eSPaul Mackerras  * and other strange ISA hardware, so we always want the
1277568cb4eSPaul Mackerras  * addresses to be allocated in the 0x000-0x0ff region
1287568cb4eSPaul Mackerras  * modulo 0x400.
1297568cb4eSPaul Mackerras  *
1307568cb4eSPaul Mackerras  * Why? Because some silly external IO cards only decode
1317568cb4eSPaul Mackerras  * the low 10 bits of the IO address. The 0x00-0xff region
1327568cb4eSPaul Mackerras  * is reserved for motherboard devices that decode all 16
1337568cb4eSPaul Mackerras  * bits, so it's ok to allocate at, say, 0x2800-0x28ff,
1347568cb4eSPaul Mackerras  * but we want to try to avoid allocating at 0x2900-0x2bff
1357568cb4eSPaul Mackerras  * which might have be mirrored at 0x0100-0x03ff..
1367568cb4eSPaul Mackerras  */
1377568cb4eSPaul Mackerras void pcibios_align_resource(void *data, struct resource *res,
138e31dd6e4SGreg Kroah-Hartman 			    resource_size_t size, resource_size_t align)
1397568cb4eSPaul Mackerras {
1407568cb4eSPaul Mackerras 	struct pci_dev *dev = data;
1417568cb4eSPaul Mackerras 	struct pci_controller *hose = pci_bus_to_host(dev->bus);
142e31dd6e4SGreg Kroah-Hartman 	resource_size_t start = res->start;
1437568cb4eSPaul Mackerras 	unsigned long alignto;
1447568cb4eSPaul Mackerras 
1457568cb4eSPaul Mackerras 	if (res->flags & IORESOURCE_IO) {
1467568cb4eSPaul Mackerras 	        unsigned long offset = (unsigned long)hose->io_base_virt -
1473d5134eeSBenjamin Herrenschmidt 					_IO_BASE;
1487568cb4eSPaul Mackerras 		/* Make sure we start at our min on all hoses */
1497568cb4eSPaul Mackerras 		if (start - offset < PCIBIOS_MIN_IO)
1507568cb4eSPaul Mackerras 			start = PCIBIOS_MIN_IO + offset;
1517568cb4eSPaul Mackerras 
1527568cb4eSPaul Mackerras 		/*
1537568cb4eSPaul Mackerras 		 * Put everything into 0x00-0xff region modulo 0x400
1547568cb4eSPaul Mackerras 		 */
1557568cb4eSPaul Mackerras 		if (start & 0x300)
1567568cb4eSPaul Mackerras 			start = (start + 0x3ff) & ~0x3ff;
1577568cb4eSPaul Mackerras 
1587568cb4eSPaul Mackerras 	} else if (res->flags & IORESOURCE_MEM) {
1597568cb4eSPaul Mackerras 		/* Make sure we start at our min on all hoses */
1607568cb4eSPaul Mackerras 		if (start - hose->pci_mem_offset < PCIBIOS_MIN_MEM)
1617568cb4eSPaul Mackerras 			start = PCIBIOS_MIN_MEM + hose->pci_mem_offset;
1627568cb4eSPaul Mackerras 
1637568cb4eSPaul Mackerras 		/* Align to multiple of size of minimum base.  */
1647568cb4eSPaul Mackerras 		alignto = max(0x1000UL, align);
1657568cb4eSPaul Mackerras 		start = ALIGN(start, alignto);
1667568cb4eSPaul Mackerras 	}
1677568cb4eSPaul Mackerras 
1687568cb4eSPaul Mackerras 	res->start = start;
1697568cb4eSPaul Mackerras }
1707568cb4eSPaul Mackerras 
171facf0787SLinas Vepstas void __devinit pcibios_claim_one_bus(struct pci_bus *b)
1727568cb4eSPaul Mackerras {
1737568cb4eSPaul Mackerras 	struct pci_dev *dev;
1747568cb4eSPaul Mackerras 	struct pci_bus *child_bus;
1757568cb4eSPaul Mackerras 
1767568cb4eSPaul Mackerras 	list_for_each_entry(dev, &b->devices, bus_list) {
1777568cb4eSPaul Mackerras 		int i;
1787568cb4eSPaul Mackerras 
1797568cb4eSPaul Mackerras 		for (i = 0; i < PCI_NUM_RESOURCES; i++) {
1807568cb4eSPaul Mackerras 			struct resource *r = &dev->resource[i];
1817568cb4eSPaul Mackerras 
1827568cb4eSPaul Mackerras 			if (r->parent || !r->start || !r->flags)
1837568cb4eSPaul Mackerras 				continue;
1847568cb4eSPaul Mackerras 			pci_claim_resource(dev, i);
1857568cb4eSPaul Mackerras 		}
1867568cb4eSPaul Mackerras 	}
1877568cb4eSPaul Mackerras 
1887568cb4eSPaul Mackerras 	list_for_each_entry(child_bus, &b->children, node)
1897568cb4eSPaul Mackerras 		pcibios_claim_one_bus(child_bus);
1907568cb4eSPaul Mackerras }
191af9deabeSlinas #ifdef CONFIG_HOTPLUG
192af9deabeSlinas EXPORT_SYMBOL_GPL(pcibios_claim_one_bus);
193af9deabeSlinas #endif
1947568cb4eSPaul Mackerras 
1957568cb4eSPaul Mackerras static void __init pcibios_claim_of_setup(void)
1967568cb4eSPaul Mackerras {
1977568cb4eSPaul Mackerras 	struct pci_bus *b;
1987568cb4eSPaul Mackerras 
1997568cb4eSPaul Mackerras 	list_for_each_entry(b, &pci_root_buses, node)
2007568cb4eSPaul Mackerras 		pcibios_claim_one_bus(b);
2017568cb4eSPaul Mackerras }
2027568cb4eSPaul Mackerras 
2037568cb4eSPaul Mackerras static u32 get_int_prop(struct device_node *np, const char *name, u32 def)
2047568cb4eSPaul Mackerras {
205a7f67bdfSJeremy Kerr 	const u32 *prop;
2067568cb4eSPaul Mackerras 	int len;
2077568cb4eSPaul Mackerras 
208e2eb6392SStephen Rothwell 	prop = of_get_property(np, name, &len);
2097568cb4eSPaul Mackerras 	if (prop && len >= 4)
2107568cb4eSPaul Mackerras 		return *prop;
2117568cb4eSPaul Mackerras 	return def;
2127568cb4eSPaul Mackerras }
2137568cb4eSPaul Mackerras 
2147568cb4eSPaul Mackerras static unsigned int pci_parse_of_flags(u32 addr0)
2157568cb4eSPaul Mackerras {
2167568cb4eSPaul Mackerras 	unsigned int flags = 0;
2177568cb4eSPaul Mackerras 
2187568cb4eSPaul Mackerras 	if (addr0 & 0x02000000) {
2197568cb4eSPaul Mackerras 		flags = IORESOURCE_MEM | PCI_BASE_ADDRESS_SPACE_MEMORY;
2207568cb4eSPaul Mackerras 		flags |= (addr0 >> 22) & PCI_BASE_ADDRESS_MEM_TYPE_64;
2217568cb4eSPaul Mackerras 		flags |= (addr0 >> 28) & PCI_BASE_ADDRESS_MEM_TYPE_1M;
2227568cb4eSPaul Mackerras 		if (addr0 & 0x40000000)
2237568cb4eSPaul Mackerras 			flags |= IORESOURCE_PREFETCH
2247568cb4eSPaul Mackerras 				 | PCI_BASE_ADDRESS_MEM_PREFETCH;
2257568cb4eSPaul Mackerras 	} else if (addr0 & 0x01000000)
2267568cb4eSPaul Mackerras 		flags = IORESOURCE_IO | PCI_BASE_ADDRESS_SPACE_IO;
2277568cb4eSPaul Mackerras 	return flags;
2287568cb4eSPaul Mackerras }
2297568cb4eSPaul Mackerras 
2307568cb4eSPaul Mackerras 
2317568cb4eSPaul Mackerras static void pci_parse_of_addrs(struct device_node *node, struct pci_dev *dev)
2327568cb4eSPaul Mackerras {
2337568cb4eSPaul Mackerras 	u64 base, size;
2347568cb4eSPaul Mackerras 	unsigned int flags;
2357568cb4eSPaul Mackerras 	struct resource *res;
236a7f67bdfSJeremy Kerr 	const u32 *addrs;
237a7f67bdfSJeremy Kerr 	u32 i;
2387568cb4eSPaul Mackerras 	int proplen;
2397568cb4eSPaul Mackerras 
240e2eb6392SStephen Rothwell 	addrs = of_get_property(node, "assigned-addresses", &proplen);
2417568cb4eSPaul Mackerras 	if (!addrs)
2427568cb4eSPaul Mackerras 		return;
2431beb6a7dSBenjamin Herrenschmidt 	DBG("    parse addresses (%d bytes) @ %p\n", proplen, addrs);
2447568cb4eSPaul Mackerras 	for (; proplen >= 20; proplen -= 20, addrs += 5) {
2457568cb4eSPaul Mackerras 		flags = pci_parse_of_flags(addrs[0]);
2467568cb4eSPaul Mackerras 		if (!flags)
2477568cb4eSPaul Mackerras 			continue;
248327e22dfSJon Loeliger 		base = of_read_number(&addrs[1], 2);
249327e22dfSJon Loeliger 		size = of_read_number(&addrs[3], 2);
2507568cb4eSPaul Mackerras 		if (!size)
2517568cb4eSPaul Mackerras 			continue;
2527568cb4eSPaul Mackerras 		i = addrs[0] & 0xff;
2531beb6a7dSBenjamin Herrenschmidt 		DBG("  base: %llx, size: %llx, i: %x\n",
2541beb6a7dSBenjamin Herrenschmidt 		    (unsigned long long)base, (unsigned long long)size, i);
2551beb6a7dSBenjamin Herrenschmidt 
2567568cb4eSPaul Mackerras 		if (PCI_BASE_ADDRESS_0 <= i && i <= PCI_BASE_ADDRESS_5) {
2577568cb4eSPaul Mackerras 			res = &dev->resource[(i - PCI_BASE_ADDRESS_0) >> 2];
2587568cb4eSPaul Mackerras 		} else if (i == dev->rom_base_reg) {
2597568cb4eSPaul Mackerras 			res = &dev->resource[PCI_ROM_RESOURCE];
2607568cb4eSPaul Mackerras 			flags |= IORESOURCE_READONLY | IORESOURCE_CACHEABLE;
2617568cb4eSPaul Mackerras 		} else {
2627568cb4eSPaul Mackerras 			printk(KERN_ERR "PCI: bad cfg reg num 0x%x\n", i);
2637568cb4eSPaul Mackerras 			continue;
2647568cb4eSPaul Mackerras 		}
2657568cb4eSPaul Mackerras 		res->start = base;
2667568cb4eSPaul Mackerras 		res->end = base + size - 1;
2677568cb4eSPaul Mackerras 		res->flags = flags;
2687568cb4eSPaul Mackerras 		res->name = pci_name(dev);
2697568cb4eSPaul Mackerras 		fixup_resource(res, dev);
2707568cb4eSPaul Mackerras 	}
2717568cb4eSPaul Mackerras }
2727568cb4eSPaul Mackerras 
2737568cb4eSPaul Mackerras struct pci_dev *of_create_pci_dev(struct device_node *node,
2747568cb4eSPaul Mackerras 				 struct pci_bus *bus, int devfn)
2757568cb4eSPaul Mackerras {
2767568cb4eSPaul Mackerras 	struct pci_dev *dev;
2777568cb4eSPaul Mackerras 	const char *type;
2787568cb4eSPaul Mackerras 
279bab41e9bSMichael Ellerman 	dev = alloc_pci_dev();
2807568cb4eSPaul Mackerras 	if (!dev)
2817568cb4eSPaul Mackerras 		return NULL;
282e2eb6392SStephen Rothwell 	type = of_get_property(node, "device_type", NULL);
2837568cb4eSPaul Mackerras 	if (type == NULL)
2847568cb4eSPaul Mackerras 		type = "";
2857568cb4eSPaul Mackerras 
2861beb6a7dSBenjamin Herrenschmidt 	DBG("    create device, devfn: %x, type: %s\n", devfn, type);
2871beb6a7dSBenjamin Herrenschmidt 
2887568cb4eSPaul Mackerras 	dev->bus = bus;
2897568cb4eSPaul Mackerras 	dev->sysdata = node;
2907568cb4eSPaul Mackerras 	dev->dev.parent = bus->bridge;
2917568cb4eSPaul Mackerras 	dev->dev.bus = &pci_bus_type;
2927568cb4eSPaul Mackerras 	dev->devfn = devfn;
2937568cb4eSPaul Mackerras 	dev->multifunction = 0;		/* maybe a lie? */
2947568cb4eSPaul Mackerras 
2957568cb4eSPaul Mackerras 	dev->vendor = get_int_prop(node, "vendor-id", 0xffff);
2967568cb4eSPaul Mackerras 	dev->device = get_int_prop(node, "device-id", 0xffff);
2977568cb4eSPaul Mackerras 	dev->subsystem_vendor = get_int_prop(node, "subsystem-vendor-id", 0);
2987568cb4eSPaul Mackerras 	dev->subsystem_device = get_int_prop(node, "subsystem-id", 0);
2997568cb4eSPaul Mackerras 
3009d17a5c6SBenjamin Herrenschmidt 	dev->cfg_size = pci_cfg_space_size(dev);
3017568cb4eSPaul Mackerras 
3027568cb4eSPaul Mackerras 	sprintf(pci_name(dev), "%04x:%02x:%02x.%d", pci_domain_nr(bus),
3037568cb4eSPaul Mackerras 		dev->bus->number, PCI_SLOT(devfn), PCI_FUNC(devfn));
3047568cb4eSPaul Mackerras 	dev->class = get_int_prop(node, "class-code", 0);
305b8a3a521SAuke Kok 	dev->revision = get_int_prop(node, "revision-id", 0);
3067568cb4eSPaul Mackerras 
3071beb6a7dSBenjamin Herrenschmidt 	DBG("    class: 0x%x\n", dev->class);
308b8a3a521SAuke Kok 	DBG("    revision: 0x%x\n", dev->revision);
3091beb6a7dSBenjamin Herrenschmidt 
3107568cb4eSPaul Mackerras 	dev->current_state = 4;		/* unknown power state */
311bb63ab13SLinas Vepstas 	dev->error_state = pci_channel_io_normal;
3128f2ea1fdSBenjamin Herrenschmidt 	dev->dma_mask = 0xffffffff;
3137568cb4eSPaul Mackerras 
314bb53bb3dSJake Moilanen 	if (!strcmp(type, "pci") || !strcmp(type, "pciex")) {
3157568cb4eSPaul Mackerras 		/* a PCI-PCI bridge */
3167568cb4eSPaul Mackerras 		dev->hdr_type = PCI_HEADER_TYPE_BRIDGE;
3177568cb4eSPaul Mackerras 		dev->rom_base_reg = PCI_ROM_ADDRESS1;
3187568cb4eSPaul Mackerras 	} else if (!strcmp(type, "cardbus")) {
3197568cb4eSPaul Mackerras 		dev->hdr_type = PCI_HEADER_TYPE_CARDBUS;
3207568cb4eSPaul Mackerras 	} else {
3217568cb4eSPaul Mackerras 		dev->hdr_type = PCI_HEADER_TYPE_NORMAL;
3227568cb4eSPaul Mackerras 		dev->rom_base_reg = PCI_ROM_ADDRESS;
3230ebfff14SBenjamin Herrenschmidt 		/* Maybe do a default OF mapping here */
3247568cb4eSPaul Mackerras 		dev->irq = NO_IRQ;
3257568cb4eSPaul Mackerras 	}
3267568cb4eSPaul Mackerras 
3277568cb4eSPaul Mackerras 	pci_parse_of_addrs(node, dev);
3287568cb4eSPaul Mackerras 
3291beb6a7dSBenjamin Herrenschmidt 	DBG("    adding to system ...\n");
3301beb6a7dSBenjamin Herrenschmidt 
3317568cb4eSPaul Mackerras 	pci_device_add(dev, bus);
3327568cb4eSPaul Mackerras 
3337568cb4eSPaul Mackerras 	return dev;
3347568cb4eSPaul Mackerras }
3357568cb4eSPaul Mackerras EXPORT_SYMBOL(of_create_pci_dev);
3367568cb4eSPaul Mackerras 
3377568cb4eSPaul Mackerras void __devinit of_scan_bus(struct device_node *node,
3387568cb4eSPaul Mackerras 				  struct pci_bus *bus)
3397568cb4eSPaul Mackerras {
3407568cb4eSPaul Mackerras 	struct device_node *child = NULL;
341a7f67bdfSJeremy Kerr 	const u32 *reg;
3427568cb4eSPaul Mackerras 	int reglen, devfn;
3437568cb4eSPaul Mackerras 	struct pci_dev *dev;
3447568cb4eSPaul Mackerras 
3451beb6a7dSBenjamin Herrenschmidt 	DBG("of_scan_bus(%s) bus no %d... \n", node->full_name, bus->number);
3461beb6a7dSBenjamin Herrenschmidt 
3477568cb4eSPaul Mackerras 	while ((child = of_get_next_child(node, child)) != NULL) {
3481beb6a7dSBenjamin Herrenschmidt 		DBG("  * %s\n", child->full_name);
349e2eb6392SStephen Rothwell 		reg = of_get_property(child, "reg", &reglen);
3507568cb4eSPaul Mackerras 		if (reg == NULL || reglen < 20)
3517568cb4eSPaul Mackerras 			continue;
3527568cb4eSPaul Mackerras 		devfn = (reg[0] >> 8) & 0xff;
3531beb6a7dSBenjamin Herrenschmidt 
3547568cb4eSPaul Mackerras 		/* create a new pci_dev for this device */
3557568cb4eSPaul Mackerras 		dev = of_create_pci_dev(child, bus, devfn);
3567568cb4eSPaul Mackerras 		if (!dev)
3577568cb4eSPaul Mackerras 			continue;
3581beb6a7dSBenjamin Herrenschmidt 		DBG("dev header type: %x\n", dev->hdr_type);
3591beb6a7dSBenjamin Herrenschmidt 
3607568cb4eSPaul Mackerras 		if (dev->hdr_type == PCI_HEADER_TYPE_BRIDGE ||
3617568cb4eSPaul Mackerras 		    dev->hdr_type == PCI_HEADER_TYPE_CARDBUS)
3627568cb4eSPaul Mackerras 			of_scan_pci_bridge(child, dev);
3637568cb4eSPaul Mackerras 	}
3647568cb4eSPaul Mackerras 
3657568cb4eSPaul Mackerras 	do_bus_setup(bus);
3667568cb4eSPaul Mackerras }
3677568cb4eSPaul Mackerras EXPORT_SYMBOL(of_scan_bus);
3687568cb4eSPaul Mackerras 
3697568cb4eSPaul Mackerras void __devinit of_scan_pci_bridge(struct device_node *node,
3707568cb4eSPaul Mackerras 			 	struct pci_dev *dev)
3717568cb4eSPaul Mackerras {
3727568cb4eSPaul Mackerras 	struct pci_bus *bus;
373a7f67bdfSJeremy Kerr 	const u32 *busrange, *ranges;
3747568cb4eSPaul Mackerras 	int len, i, mode;
3757568cb4eSPaul Mackerras 	struct resource *res;
3767568cb4eSPaul Mackerras 	unsigned int flags;
3777568cb4eSPaul Mackerras 	u64 size;
3787568cb4eSPaul Mackerras 
3791beb6a7dSBenjamin Herrenschmidt 	DBG("of_scan_pci_bridge(%s)\n", node->full_name);
3801beb6a7dSBenjamin Herrenschmidt 
3817568cb4eSPaul Mackerras 	/* parse bus-range property */
382e2eb6392SStephen Rothwell 	busrange = of_get_property(node, "bus-range", &len);
3837568cb4eSPaul Mackerras 	if (busrange == NULL || len != 8) {
3841beb6a7dSBenjamin Herrenschmidt 		printk(KERN_DEBUG "Can't get bus-range for PCI-PCI bridge %s\n",
3857568cb4eSPaul Mackerras 		       node->full_name);
3867568cb4eSPaul Mackerras 		return;
3877568cb4eSPaul Mackerras 	}
388e2eb6392SStephen Rothwell 	ranges = of_get_property(node, "ranges", &len);
3897568cb4eSPaul Mackerras 	if (ranges == NULL) {
3901beb6a7dSBenjamin Herrenschmidt 		printk(KERN_DEBUG "Can't get ranges for PCI-PCI bridge %s\n",
3917568cb4eSPaul Mackerras 		       node->full_name);
3927568cb4eSPaul Mackerras 		return;
3937568cb4eSPaul Mackerras 	}
3947568cb4eSPaul Mackerras 
3957568cb4eSPaul Mackerras 	bus = pci_add_new_bus(dev->bus, dev, busrange[0]);
3967568cb4eSPaul Mackerras 	if (!bus) {
3977568cb4eSPaul Mackerras 		printk(KERN_ERR "Failed to create pci bus for %s\n",
3987568cb4eSPaul Mackerras 		       node->full_name);
3997568cb4eSPaul Mackerras 		return;
4007568cb4eSPaul Mackerras 	}
4017568cb4eSPaul Mackerras 
4027568cb4eSPaul Mackerras 	bus->primary = dev->bus->number;
4037568cb4eSPaul Mackerras 	bus->subordinate = busrange[1];
4047568cb4eSPaul Mackerras 	bus->bridge_ctl = 0;
4057568cb4eSPaul Mackerras 	bus->sysdata = node;
4067568cb4eSPaul Mackerras 
4077568cb4eSPaul Mackerras 	/* parse ranges property */
4087568cb4eSPaul Mackerras 	/* PCI #address-cells == 3 and #size-cells == 2 always */
4097568cb4eSPaul Mackerras 	res = &dev->resource[PCI_BRIDGE_RESOURCES];
4107568cb4eSPaul Mackerras 	for (i = 0; i < PCI_NUM_RESOURCES - PCI_BRIDGE_RESOURCES; ++i) {
4117568cb4eSPaul Mackerras 		res->flags = 0;
4127568cb4eSPaul Mackerras 		bus->resource[i] = res;
4137568cb4eSPaul Mackerras 		++res;
4147568cb4eSPaul Mackerras 	}
4157568cb4eSPaul Mackerras 	i = 1;
4167568cb4eSPaul Mackerras 	for (; len >= 32; len -= 32, ranges += 8) {
4177568cb4eSPaul Mackerras 		flags = pci_parse_of_flags(ranges[0]);
418327e22dfSJon Loeliger 		size = of_read_number(&ranges[6], 2);
4197568cb4eSPaul Mackerras 		if (flags == 0 || size == 0)
4207568cb4eSPaul Mackerras 			continue;
4217568cb4eSPaul Mackerras 		if (flags & IORESOURCE_IO) {
4227568cb4eSPaul Mackerras 			res = bus->resource[0];
4237568cb4eSPaul Mackerras 			if (res->flags) {
4247568cb4eSPaul Mackerras 				printk(KERN_ERR "PCI: ignoring extra I/O range"
4257568cb4eSPaul Mackerras 				       " for bridge %s\n", node->full_name);
4267568cb4eSPaul Mackerras 				continue;
4277568cb4eSPaul Mackerras 			}
4287568cb4eSPaul Mackerras 		} else {
4297568cb4eSPaul Mackerras 			if (i >= PCI_NUM_RESOURCES - PCI_BRIDGE_RESOURCES) {
4307568cb4eSPaul Mackerras 				printk(KERN_ERR "PCI: too many memory ranges"
4317568cb4eSPaul Mackerras 				       " for bridge %s\n", node->full_name);
4327568cb4eSPaul Mackerras 				continue;
4337568cb4eSPaul Mackerras 			}
4347568cb4eSPaul Mackerras 			res = bus->resource[i];
4357568cb4eSPaul Mackerras 			++i;
4367568cb4eSPaul Mackerras 		}
437327e22dfSJon Loeliger 		res->start = of_read_number(&ranges[1], 2);
4387568cb4eSPaul Mackerras 		res->end = res->start + size - 1;
4397568cb4eSPaul Mackerras 		res->flags = flags;
4407568cb4eSPaul Mackerras 		fixup_resource(res, dev);
4417568cb4eSPaul Mackerras 	}
4427568cb4eSPaul Mackerras 	sprintf(bus->name, "PCI Bus %04x:%02x", pci_domain_nr(bus),
4437568cb4eSPaul Mackerras 		bus->number);
4441beb6a7dSBenjamin Herrenschmidt 	DBG("    bus name: %s\n", bus->name);
4457568cb4eSPaul Mackerras 
4467568cb4eSPaul Mackerras 	mode = PCI_PROBE_NORMAL;
4477568cb4eSPaul Mackerras 	if (ppc_md.pci_probe_mode)
4487568cb4eSPaul Mackerras 		mode = ppc_md.pci_probe_mode(bus);
4491beb6a7dSBenjamin Herrenschmidt 	DBG("    probe mode: %d\n", mode);
4501beb6a7dSBenjamin Herrenschmidt 
4517568cb4eSPaul Mackerras 	if (mode == PCI_PROBE_DEVTREE)
4527568cb4eSPaul Mackerras 		of_scan_bus(node, bus);
4537568cb4eSPaul Mackerras 	else if (mode == PCI_PROBE_NORMAL)
4547568cb4eSPaul Mackerras 		pci_scan_child_bus(bus);
4557568cb4eSPaul Mackerras }
4567568cb4eSPaul Mackerras EXPORT_SYMBOL(of_scan_pci_bridge);
4577568cb4eSPaul Mackerras 
4587568cb4eSPaul Mackerras void __devinit scan_phb(struct pci_controller *hose)
4597568cb4eSPaul Mackerras {
4607568cb4eSPaul Mackerras 	struct pci_bus *bus;
461*44ef3390SStephen Rothwell 	struct device_node *node = hose->dn;
4627568cb4eSPaul Mackerras 	int i, mode;
4637568cb4eSPaul Mackerras 	struct resource *res;
4647568cb4eSPaul Mackerras 
4651beb6a7dSBenjamin Herrenschmidt 	DBG("Scanning PHB %s\n", node ? node->full_name : "<NO NAME>");
4661beb6a7dSBenjamin Herrenschmidt 
467803d4573SBenjamin Herrenschmidt 	bus = pci_create_bus(hose->parent, hose->first_busno, hose->ops, node);
4687568cb4eSPaul Mackerras 	if (bus == NULL) {
4697568cb4eSPaul Mackerras 		printk(KERN_ERR "Failed to create bus for PCI domain %04x\n",
4707568cb4eSPaul Mackerras 		       hose->global_number);
4717568cb4eSPaul Mackerras 		return;
4727568cb4eSPaul Mackerras 	}
4737568cb4eSPaul Mackerras 	bus->secondary = hose->first_busno;
4747568cb4eSPaul Mackerras 	hose->bus = bus;
4757568cb4eSPaul Mackerras 
4763d5134eeSBenjamin Herrenschmidt 	pcibios_map_io_space(bus);
4773d5134eeSBenjamin Herrenschmidt 
4787568cb4eSPaul Mackerras 	bus->resource[0] = res = &hose->io_resource;
4793d5134eeSBenjamin Herrenschmidt 	if (res->flags && request_resource(&ioport_resource, res)) {
4807568cb4eSPaul Mackerras 		printk(KERN_ERR "Failed to request PCI IO region "
4817568cb4eSPaul Mackerras 		       "on PCI domain %04x\n", hose->global_number);
4823d5134eeSBenjamin Herrenschmidt 		DBG("res->start = 0x%016lx, res->end = 0x%016lx\n",
4833d5134eeSBenjamin Herrenschmidt 		    res->start, res->end);
4843d5134eeSBenjamin Herrenschmidt 	}
4857568cb4eSPaul Mackerras 
4867568cb4eSPaul Mackerras 	for (i = 0; i < 3; ++i) {
4877568cb4eSPaul Mackerras 		res = &hose->mem_resources[i];
4887568cb4eSPaul Mackerras 		bus->resource[i+1] = res;
4897568cb4eSPaul Mackerras 		if (res->flags && request_resource(&iomem_resource, res))
4907568cb4eSPaul Mackerras 			printk(KERN_ERR "Failed to request PCI memory region "
4917568cb4eSPaul Mackerras 			       "on PCI domain %04x\n", hose->global_number);
4927568cb4eSPaul Mackerras 	}
4937568cb4eSPaul Mackerras 
4947568cb4eSPaul Mackerras 	mode = PCI_PROBE_NORMAL;
49599a565baSs.hauer@pengutronix.de 
4961beb6a7dSBenjamin Herrenschmidt 	if (node && ppc_md.pci_probe_mode)
4977568cb4eSPaul Mackerras 		mode = ppc_md.pci_probe_mode(bus);
4981beb6a7dSBenjamin Herrenschmidt 	DBG("    probe mode: %d\n", mode);
4997568cb4eSPaul Mackerras 	if (mode == PCI_PROBE_DEVTREE) {
5007568cb4eSPaul Mackerras 		bus->subordinate = hose->last_busno;
5017568cb4eSPaul Mackerras 		of_scan_bus(node, bus);
5027568cb4eSPaul Mackerras 	}
50399a565baSs.hauer@pengutronix.de 
5047568cb4eSPaul Mackerras 	if (mode == PCI_PROBE_NORMAL)
5057568cb4eSPaul Mackerras 		hose->last_busno = bus->subordinate = pci_scan_child_bus(bus);
5067568cb4eSPaul Mackerras }
5077568cb4eSPaul Mackerras 
5087568cb4eSPaul Mackerras static int __init pcibios_init(void)
5097568cb4eSPaul Mackerras {
5107568cb4eSPaul Mackerras 	struct pci_controller *hose, *tmp;
5117568cb4eSPaul Mackerras 
5127568cb4eSPaul Mackerras 	/* For now, override phys_mem_access_prot. If we need it,
5137568cb4eSPaul Mackerras 	 * later, we may move that initialization to each ppc_md
5147568cb4eSPaul Mackerras 	 */
5157568cb4eSPaul Mackerras 	ppc_md.phys_mem_access_prot = pci_phys_mem_access_prot;
5167568cb4eSPaul Mackerras 
517e884e9c5SOlof Johansson 	printk(KERN_DEBUG "PCI: Probing PCI hardware\n");
5187568cb4eSPaul Mackerras 
5197568cb4eSPaul Mackerras 	/* Scan all of the recorded PCI controllers.  */
52092eb4602SJohn Rose 	list_for_each_entry_safe(hose, tmp, &hose_list, list_node) {
5217568cb4eSPaul Mackerras 		scan_phb(hose);
52292eb4602SJohn Rose 		pci_bus_add_devices(hose->bus);
52392eb4602SJohn Rose 	}
5247568cb4eSPaul Mackerras 
5257568cb4eSPaul Mackerras 	if (pci_probe_only)
5267568cb4eSPaul Mackerras 		pcibios_claim_of_setup();
5277568cb4eSPaul Mackerras 	else
5287568cb4eSPaul Mackerras 		/* FIXME: `else' will be removed when
5297568cb4eSPaul Mackerras 		   pci_assign_unassigned_resources() is able to work
5307568cb4eSPaul Mackerras 		   correctly with [partially] allocated PCI tree. */
5317568cb4eSPaul Mackerras 		pci_assign_unassigned_resources();
5327568cb4eSPaul Mackerras 
5337568cb4eSPaul Mackerras 	/* Call machine dependent final fixup */
5347568cb4eSPaul Mackerras 	if (ppc_md.pcibios_fixup)
5357568cb4eSPaul Mackerras 		ppc_md.pcibios_fixup();
5367568cb4eSPaul Mackerras 
537e884e9c5SOlof Johansson 	printk(KERN_DEBUG "PCI: Probing PCI hardware done\n");
5387568cb4eSPaul Mackerras 
5397568cb4eSPaul Mackerras 	return 0;
5407568cb4eSPaul Mackerras }
5417568cb4eSPaul Mackerras 
5427568cb4eSPaul Mackerras subsys_initcall(pcibios_init);
5437568cb4eSPaul Mackerras 
5447568cb4eSPaul Mackerras int pcibios_enable_device(struct pci_dev *dev, int mask)
5457568cb4eSPaul Mackerras {
5467568cb4eSPaul Mackerras 	u16 cmd, oldcmd;
5477568cb4eSPaul Mackerras 	int i;
5487568cb4eSPaul Mackerras 
5497568cb4eSPaul Mackerras 	pci_read_config_word(dev, PCI_COMMAND, &cmd);
5507568cb4eSPaul Mackerras 	oldcmd = cmd;
5517568cb4eSPaul Mackerras 
5527568cb4eSPaul Mackerras 	for (i = 0; i < PCI_NUM_RESOURCES; i++) {
5537568cb4eSPaul Mackerras 		struct resource *res = &dev->resource[i];
5547568cb4eSPaul Mackerras 
5557568cb4eSPaul Mackerras 		/* Only set up the requested stuff */
5567568cb4eSPaul Mackerras 		if (!(mask & (1<<i)))
5577568cb4eSPaul Mackerras 			continue;
5587568cb4eSPaul Mackerras 
5597568cb4eSPaul Mackerras 		if (res->flags & IORESOURCE_IO)
5607568cb4eSPaul Mackerras 			cmd |= PCI_COMMAND_IO;
5617568cb4eSPaul Mackerras 		if (res->flags & IORESOURCE_MEM)
5627568cb4eSPaul Mackerras 			cmd |= PCI_COMMAND_MEMORY;
5637568cb4eSPaul Mackerras 	}
5647568cb4eSPaul Mackerras 
5657568cb4eSPaul Mackerras 	if (cmd != oldcmd) {
5667568cb4eSPaul Mackerras 		printk(KERN_DEBUG "PCI: Enabling device: (%s), cmd %x\n",
5677568cb4eSPaul Mackerras 		       pci_name(dev), cmd);
5687568cb4eSPaul Mackerras                 /* Enable the appropriate bits in the PCI command register.  */
5697568cb4eSPaul Mackerras 		pci_write_config_word(dev, PCI_COMMAND, cmd);
5707568cb4eSPaul Mackerras 	}
5717568cb4eSPaul Mackerras 	return 0;
5727568cb4eSPaul Mackerras }
5737568cb4eSPaul Mackerras 
5747568cb4eSPaul Mackerras /* Decide whether to display the domain number in /proc */
5757568cb4eSPaul Mackerras int pci_proc_domain(struct pci_bus *bus)
5767568cb4eSPaul Mackerras {
5777568cb4eSPaul Mackerras 	struct pci_controller *hose = pci_bus_to_host(bus);
5783eb523b9SArnd Bergmann 	return hose->buid != 0;
579eecba334SStephen Rothwell }
5807568cb4eSPaul Mackerras 
5817568cb4eSPaul Mackerras void __devinit pci_process_bridge_OF_ranges(struct pci_controller *hose,
5827568cb4eSPaul Mackerras 					    struct device_node *dev, int prim)
5837568cb4eSPaul Mackerras {
584a7f67bdfSJeremy Kerr 	const unsigned int *ranges;
585a7f67bdfSJeremy Kerr 	unsigned int pci_space;
5867568cb4eSPaul Mackerras 	unsigned long size;
5877568cb4eSPaul Mackerras 	int rlen = 0;
5887568cb4eSPaul Mackerras 	int memno = 0;
5897568cb4eSPaul Mackerras 	struct resource *res;
590a8bda5ddSStephen Rothwell 	int np, na = of_n_addr_cells(dev);
5917568cb4eSPaul Mackerras 	unsigned long pci_addr, cpu_phys_addr;
5927568cb4eSPaul Mackerras 
5937568cb4eSPaul Mackerras 	np = na + 5;
5947568cb4eSPaul Mackerras 
5957568cb4eSPaul Mackerras 	/* From "PCI Binding to 1275"
5967568cb4eSPaul Mackerras 	 * The ranges property is laid out as an array of elements,
5977568cb4eSPaul Mackerras 	 * each of which comprises:
5987568cb4eSPaul Mackerras 	 *   cells 0 - 2:	a PCI address
5997568cb4eSPaul Mackerras 	 *   cells 3 or 3+4:	a CPU physical address
6007568cb4eSPaul Mackerras 	 *			(size depending on dev->n_addr_cells)
6017568cb4eSPaul Mackerras 	 *   cells 4+5 or 5+6:	the size of the range
6027568cb4eSPaul Mackerras 	 */
603e2eb6392SStephen Rothwell 	ranges = of_get_property(dev, "ranges", &rlen);
604b5166cc2SBenjamin Herrenschmidt 	if (ranges == NULL)
605b5166cc2SBenjamin Herrenschmidt 		return;
606b5166cc2SBenjamin Herrenschmidt 	hose->io_base_phys = 0;
6077568cb4eSPaul Mackerras 	while ((rlen -= np * sizeof(unsigned int)) >= 0) {
6087568cb4eSPaul Mackerras 		res = NULL;
6097568cb4eSPaul Mackerras 		pci_space = ranges[0];
6107568cb4eSPaul Mackerras 		pci_addr = ((unsigned long)ranges[1] << 32) | ranges[2];
611e557a1c9SBenjamin Herrenschmidt 		cpu_phys_addr = of_translate_address(dev, &ranges[3]);
6127568cb4eSPaul Mackerras 		size = ((unsigned long)ranges[na+3] << 32) | ranges[na+4];
6137568cb4eSPaul Mackerras 		ranges += np;
6147568cb4eSPaul Mackerras 		if (size == 0)
6157568cb4eSPaul Mackerras 			continue;
6167568cb4eSPaul Mackerras 
6177568cb4eSPaul Mackerras 		/* Now consume following elements while they are contiguous */
6187568cb4eSPaul Mackerras 		while (rlen >= np * sizeof(unsigned int)) {
6197568cb4eSPaul Mackerras 			unsigned long addr, phys;
6207568cb4eSPaul Mackerras 
6217568cb4eSPaul Mackerras 			if (ranges[0] != pci_space)
6227568cb4eSPaul Mackerras 				break;
6237568cb4eSPaul Mackerras 			addr = ((unsigned long)ranges[1] << 32) | ranges[2];
6247568cb4eSPaul Mackerras 			phys = ranges[3];
6257568cb4eSPaul Mackerras 			if (na >= 2)
6267568cb4eSPaul Mackerras 				phys = (phys << 32) | ranges[4];
6277568cb4eSPaul Mackerras 			if (addr != pci_addr + size ||
6287568cb4eSPaul Mackerras 			    phys != cpu_phys_addr + size)
6297568cb4eSPaul Mackerras 				break;
6307568cb4eSPaul Mackerras 
6317568cb4eSPaul Mackerras 			size += ((unsigned long)ranges[na+3] << 32)
6327568cb4eSPaul Mackerras 				| ranges[na+4];
6337568cb4eSPaul Mackerras 			ranges += np;
6347568cb4eSPaul Mackerras 			rlen -= np * sizeof(unsigned int);
6357568cb4eSPaul Mackerras 		}
6367568cb4eSPaul Mackerras 
6377568cb4eSPaul Mackerras 		switch ((pci_space >> 24) & 0x3) {
6387568cb4eSPaul Mackerras 		case 1:		/* I/O space */
63911fbb00cSPaul Mackerras 			hose->io_base_phys = cpu_phys_addr - pci_addr;
64011fbb00cSPaul Mackerras 			/* handle from 0 to top of I/O window */
64111fbb00cSPaul Mackerras 			hose->pci_io_size = pci_addr + size;
6427568cb4eSPaul Mackerras 
6437568cb4eSPaul Mackerras 			res = &hose->io_resource;
6447568cb4eSPaul Mackerras 			res->flags = IORESOURCE_IO;
6457568cb4eSPaul Mackerras 			res->start = pci_addr;
6467568cb4eSPaul Mackerras 			DBG("phb%d: IO 0x%lx -> 0x%lx\n", hose->global_number,
6477568cb4eSPaul Mackerras 				    res->start, res->start + size - 1);
6487568cb4eSPaul Mackerras 			break;
6497568cb4eSPaul Mackerras 		case 2:		/* memory space */
6507568cb4eSPaul Mackerras 			memno = 0;
6517568cb4eSPaul Mackerras 			while (memno < 3 && hose->mem_resources[memno].flags)
6527568cb4eSPaul Mackerras 				++memno;
6537568cb4eSPaul Mackerras 
6547568cb4eSPaul Mackerras 			if (memno == 0)
6557568cb4eSPaul Mackerras 				hose->pci_mem_offset = cpu_phys_addr - pci_addr;
6567568cb4eSPaul Mackerras 			if (memno < 3) {
6577568cb4eSPaul Mackerras 				res = &hose->mem_resources[memno];
6587568cb4eSPaul Mackerras 				res->flags = IORESOURCE_MEM;
6597568cb4eSPaul Mackerras 				res->start = cpu_phys_addr;
6607568cb4eSPaul Mackerras 				DBG("phb%d: MEM 0x%lx -> 0x%lx\n", hose->global_number,
6617568cb4eSPaul Mackerras 					    res->start, res->start + size - 1);
6627568cb4eSPaul Mackerras 			}
6637568cb4eSPaul Mackerras 			break;
6647568cb4eSPaul Mackerras 		}
6657568cb4eSPaul Mackerras 		if (res != NULL) {
6667568cb4eSPaul Mackerras 			res->name = dev->full_name;
6677568cb4eSPaul Mackerras 			res->end = res->start + size - 1;
6687568cb4eSPaul Mackerras 			res->parent = NULL;
6697568cb4eSPaul Mackerras 			res->sibling = NULL;
6707568cb4eSPaul Mackerras 			res->child = NULL;
6717568cb4eSPaul Mackerras 		}
6727568cb4eSPaul Mackerras 	}
6737568cb4eSPaul Mackerras }
6747568cb4eSPaul Mackerras 
6753d5134eeSBenjamin Herrenschmidt #ifdef CONFIG_HOTPLUG
6763d5134eeSBenjamin Herrenschmidt 
6773d5134eeSBenjamin Herrenschmidt int pcibios_unmap_io_space(struct pci_bus *bus)
6787568cb4eSPaul Mackerras {
6793d5134eeSBenjamin Herrenschmidt 	struct pci_controller *hose;
6807568cb4eSPaul Mackerras 
6813d5134eeSBenjamin Herrenschmidt 	WARN_ON(bus == NULL);
682de821204SBenjamin Herrenschmidt 
6833d5134eeSBenjamin Herrenschmidt 	/* If this is not a PHB, we only flush the hash table over
6843d5134eeSBenjamin Herrenschmidt 	 * the area mapped by this bridge. We don't play with the PTE
6853d5134eeSBenjamin Herrenschmidt 	 * mappings since we might have to deal with sub-page alignemnts
6863d5134eeSBenjamin Herrenschmidt 	 * so flushing the hash table is the only sane way to make sure
6873d5134eeSBenjamin Herrenschmidt 	 * that no hash entries are covering that removed bridge area
6883d5134eeSBenjamin Herrenschmidt 	 * while still allowing other busses overlapping those pages
689de821204SBenjamin Herrenschmidt 	 */
6903d5134eeSBenjamin Herrenschmidt 	if (bus->self) {
6913d5134eeSBenjamin Herrenschmidt 		struct resource *res = bus->resource[0];
6923d5134eeSBenjamin Herrenschmidt 
6933d5134eeSBenjamin Herrenschmidt 		DBG("IO unmapping for PCI-PCI bridge %s\n",
6943d5134eeSBenjamin Herrenschmidt 		    pci_name(bus->self));
6953d5134eeSBenjamin Herrenschmidt 
6963d5134eeSBenjamin Herrenschmidt 		__flush_hash_table_range(&init_mm, res->start + _IO_BASE,
6973d5134eeSBenjamin Herrenschmidt 					 res->end - res->start + 1);
6983d5134eeSBenjamin Herrenschmidt 		return 0;
6997568cb4eSPaul Mackerras 	}
7007568cb4eSPaul Mackerras 
7013d5134eeSBenjamin Herrenschmidt 	/* Get the host bridge */
7023d5134eeSBenjamin Herrenschmidt 	hose = pci_bus_to_host(bus);
7033d5134eeSBenjamin Herrenschmidt 
7043d5134eeSBenjamin Herrenschmidt 	/* Check if we have IOs allocated */
7053d5134eeSBenjamin Herrenschmidt 	if (hose->io_base_alloc == 0)
7063d5134eeSBenjamin Herrenschmidt 		return 0;
7073d5134eeSBenjamin Herrenschmidt 
708*44ef3390SStephen Rothwell 	DBG("IO unmapping for PHB %s\n", hose->dn->full_name);
7093d5134eeSBenjamin Herrenschmidt 	DBG("  alloc=0x%p\n", hose->io_base_alloc);
7103d5134eeSBenjamin Herrenschmidt 
7113d5134eeSBenjamin Herrenschmidt 	/* This is a PHB, we fully unmap the IO area */
7123d5134eeSBenjamin Herrenschmidt 	vunmap(hose->io_base_alloc);
7133d5134eeSBenjamin Herrenschmidt 
7143d5134eeSBenjamin Herrenschmidt 	return 0;
7153d5134eeSBenjamin Herrenschmidt }
7163d5134eeSBenjamin Herrenschmidt EXPORT_SYMBOL_GPL(pcibios_unmap_io_space);
7173d5134eeSBenjamin Herrenschmidt 
7183d5134eeSBenjamin Herrenschmidt #endif /* CONFIG_HOTPLUG */
7193d5134eeSBenjamin Herrenschmidt 
7203d5134eeSBenjamin Herrenschmidt int __devinit pcibios_map_io_space(struct pci_bus *bus)
7217568cb4eSPaul Mackerras {
7223d5134eeSBenjamin Herrenschmidt 	struct vm_struct *area;
7233d5134eeSBenjamin Herrenschmidt 	unsigned long phys_page;
7243d5134eeSBenjamin Herrenschmidt 	unsigned long size_page;
7257568cb4eSPaul Mackerras 	unsigned long io_virt_offset;
7263d5134eeSBenjamin Herrenschmidt 	struct pci_controller *hose;
7277568cb4eSPaul Mackerras 
7283d5134eeSBenjamin Herrenschmidt 	WARN_ON(bus == NULL);
729de821204SBenjamin Herrenschmidt 
7303d5134eeSBenjamin Herrenschmidt 	/* If this not a PHB, nothing to do, page tables still exist and
7313d5134eeSBenjamin Herrenschmidt 	 * thus HPTEs will be faulted in when needed
7323d5134eeSBenjamin Herrenschmidt 	 */
7333d5134eeSBenjamin Herrenschmidt 	if (bus->self) {
7343d5134eeSBenjamin Herrenschmidt 		DBG("IO mapping for PCI-PCI bridge %s\n",
7353d5134eeSBenjamin Herrenschmidt 		    pci_name(bus->self));
7363d5134eeSBenjamin Herrenschmidt 		DBG("  virt=0x%016lx...0x%016lx\n",
7373d5134eeSBenjamin Herrenschmidt 		    bus->resource[0]->start + _IO_BASE,
7383d5134eeSBenjamin Herrenschmidt 		    bus->resource[0]->end + _IO_BASE);
7397568cb4eSPaul Mackerras 		return 0;
7407568cb4eSPaul Mackerras 	}
7417568cb4eSPaul Mackerras 
7423d5134eeSBenjamin Herrenschmidt 	/* Get the host bridge */
7433d5134eeSBenjamin Herrenschmidt 	hose = pci_bus_to_host(bus);
7443d5134eeSBenjamin Herrenschmidt 	phys_page = _ALIGN_DOWN(hose->io_base_phys, PAGE_SIZE);
7453d5134eeSBenjamin Herrenschmidt 	size_page = _ALIGN_UP(hose->pci_io_size, PAGE_SIZE);
7467568cb4eSPaul Mackerras 
7473d5134eeSBenjamin Herrenschmidt 	/* Make sure IO area address is clear */
7483d5134eeSBenjamin Herrenschmidt 	hose->io_base_alloc = NULL;
7497568cb4eSPaul Mackerras 
7503d5134eeSBenjamin Herrenschmidt 	/* If there's no IO to map on that bus, get away too */
7513d5134eeSBenjamin Herrenschmidt 	if (hose->pci_io_size == 0 || hose->io_base_phys == 0)
7523d5134eeSBenjamin Herrenschmidt 		return 0;
7533d5134eeSBenjamin Herrenschmidt 
7543d5134eeSBenjamin Herrenschmidt 	/* Let's allocate some IO space for that guy. We don't pass
7553d5134eeSBenjamin Herrenschmidt 	 * VM_IOREMAP because we don't care about alignment tricks that
7563d5134eeSBenjamin Herrenschmidt 	 * the core does in that case. Maybe we should due to stupid card
7573d5134eeSBenjamin Herrenschmidt 	 * with incomplete address decoding but I'd rather not deal with
7583d5134eeSBenjamin Herrenschmidt 	 * those outside of the reserved 64K legacy region.
7593d5134eeSBenjamin Herrenschmidt 	 */
7603d5134eeSBenjamin Herrenschmidt 	area = __get_vm_area(size_page, 0, PHB_IO_BASE, PHB_IO_END);
7613d5134eeSBenjamin Herrenschmidt 	if (area == NULL)
7623d5134eeSBenjamin Herrenschmidt 		return -ENOMEM;
7633d5134eeSBenjamin Herrenschmidt 	hose->io_base_alloc = area->addr;
7643d5134eeSBenjamin Herrenschmidt 	hose->io_base_virt = (void __iomem *)(area->addr +
7653d5134eeSBenjamin Herrenschmidt 					      hose->io_base_phys - phys_page);
7663d5134eeSBenjamin Herrenschmidt 
767*44ef3390SStephen Rothwell 	DBG("IO mapping for PHB %s\n", hose->dn->full_name);
7683d5134eeSBenjamin Herrenschmidt 	DBG("  phys=0x%016lx, virt=0x%p (alloc=0x%p)\n",
7693d5134eeSBenjamin Herrenschmidt 	    hose->io_base_phys, hose->io_base_virt, hose->io_base_alloc);
7703d5134eeSBenjamin Herrenschmidt 	DBG("  size=0x%016lx (alloc=0x%016lx)\n",
7713d5134eeSBenjamin Herrenschmidt 	    hose->pci_io_size, size_page);
7723d5134eeSBenjamin Herrenschmidt 
7733d5134eeSBenjamin Herrenschmidt 	/* Establish the mapping */
7743d5134eeSBenjamin Herrenschmidt 	if (__ioremap_at(phys_page, area->addr, size_page,
7753d5134eeSBenjamin Herrenschmidt 			 _PAGE_NO_CACHE | _PAGE_GUARDED) == NULL)
7763d5134eeSBenjamin Herrenschmidt 		return -ENOMEM;
7773d5134eeSBenjamin Herrenschmidt 
7783d5134eeSBenjamin Herrenschmidt 	/* Fixup hose IO resource */
7793d5134eeSBenjamin Herrenschmidt 	io_virt_offset = (unsigned long)hose->io_base_virt - _IO_BASE;
7803d5134eeSBenjamin Herrenschmidt 	hose->io_resource.start += io_virt_offset;
7813d5134eeSBenjamin Herrenschmidt 	hose->io_resource.end += io_virt_offset;
7823d5134eeSBenjamin Herrenschmidt 
7833d5134eeSBenjamin Herrenschmidt 	DBG("  hose->io_resource=0x%016lx...0x%016lx\n",
7843d5134eeSBenjamin Herrenschmidt 	    hose->io_resource.start, hose->io_resource.end);
7857568cb4eSPaul Mackerras 
7867568cb4eSPaul Mackerras 	return 0;
7877568cb4eSPaul Mackerras }
7883d5134eeSBenjamin Herrenschmidt EXPORT_SYMBOL_GPL(pcibios_map_io_space);
7897568cb4eSPaul Mackerras 
7907568cb4eSPaul Mackerras static void __devinit fixup_resource(struct resource *res, struct pci_dev *dev)
7917568cb4eSPaul Mackerras {
7927568cb4eSPaul Mackerras 	struct pci_controller *hose = pci_bus_to_host(dev->bus);
793c256f4b9SAnton Blanchard 	unsigned long offset;
7947568cb4eSPaul Mackerras 
7957568cb4eSPaul Mackerras 	if (res->flags & IORESOURCE_IO) {
7963d5134eeSBenjamin Herrenschmidt 		offset = (unsigned long)hose->io_base_virt - _IO_BASE;
797c256f4b9SAnton Blanchard 		res->start += offset;
798c256f4b9SAnton Blanchard 		res->end += offset;
7997568cb4eSPaul Mackerras 	} else if (res->flags & IORESOURCE_MEM) {
8007568cb4eSPaul Mackerras 		res->start += hose->pci_mem_offset;
8017568cb4eSPaul Mackerras 		res->end += hose->pci_mem_offset;
8027568cb4eSPaul Mackerras 	}
8037568cb4eSPaul Mackerras }
8047568cb4eSPaul Mackerras 
8057568cb4eSPaul Mackerras void __devinit pcibios_fixup_device_resources(struct pci_dev *dev,
8067568cb4eSPaul Mackerras 					      struct pci_bus *bus)
8077568cb4eSPaul Mackerras {
8087568cb4eSPaul Mackerras 	/* Update device resources.  */
8097568cb4eSPaul Mackerras 	int i;
8107568cb4eSPaul Mackerras 
8113d5134eeSBenjamin Herrenschmidt 	DBG("%s: Fixup resources:\n", pci_name(dev));
8123d5134eeSBenjamin Herrenschmidt 	for (i = 0; i < PCI_NUM_RESOURCES; i++) {
8133d5134eeSBenjamin Herrenschmidt 		struct resource *res = &dev->resource[i];
8143d5134eeSBenjamin Herrenschmidt 		if (!res->flags)
8153d5134eeSBenjamin Herrenschmidt 			continue;
8163d5134eeSBenjamin Herrenschmidt 
8173d5134eeSBenjamin Herrenschmidt 		DBG("  0x%02x < %08lx:0x%016lx...0x%016lx\n",
8183d5134eeSBenjamin Herrenschmidt 		    i, res->flags, res->start, res->end);
8193d5134eeSBenjamin Herrenschmidt 
8203d5134eeSBenjamin Herrenschmidt 		fixup_resource(res, dev);
8213d5134eeSBenjamin Herrenschmidt 
8223d5134eeSBenjamin Herrenschmidt 		DBG("       > %08lx:0x%016lx...0x%016lx\n",
8233d5134eeSBenjamin Herrenschmidt 		    res->flags, res->start, res->end);
8243d5134eeSBenjamin Herrenschmidt 	}
8257568cb4eSPaul Mackerras }
8267568cb4eSPaul Mackerras EXPORT_SYMBOL(pcibios_fixup_device_resources);
8277568cb4eSPaul Mackerras 
82812d04eefSBenjamin Herrenschmidt void __devinit pcibios_setup_new_device(struct pci_dev *dev)
82912d04eefSBenjamin Herrenschmidt {
83012d04eefSBenjamin Herrenschmidt 	struct dev_archdata *sd = &dev->dev.archdata;
83112d04eefSBenjamin Herrenschmidt 
83212d04eefSBenjamin Herrenschmidt 	sd->of_node = pci_device_to_OF_node(dev);
83312d04eefSBenjamin Herrenschmidt 
83412d04eefSBenjamin Herrenschmidt 	DBG("PCI device %s OF node: %s\n", pci_name(dev),
83512d04eefSBenjamin Herrenschmidt 	    sd->of_node ? sd->of_node->full_name : "<none>");
83612d04eefSBenjamin Herrenschmidt 
83712d04eefSBenjamin Herrenschmidt 	sd->dma_ops = pci_dma_ops;
83812d04eefSBenjamin Herrenschmidt #ifdef CONFIG_NUMA
83912d04eefSBenjamin Herrenschmidt 	sd->numa_node = pcibus_to_node(dev->bus);
84012d04eefSBenjamin Herrenschmidt #else
84112d04eefSBenjamin Herrenschmidt 	sd->numa_node = -1;
84212d04eefSBenjamin Herrenschmidt #endif
84312d04eefSBenjamin Herrenschmidt 	if (ppc_md.pci_dma_dev_setup)
84412d04eefSBenjamin Herrenschmidt 		ppc_md.pci_dma_dev_setup(dev);
84512d04eefSBenjamin Herrenschmidt }
84612d04eefSBenjamin Herrenschmidt EXPORT_SYMBOL(pcibios_setup_new_device);
847463ce0e1SBenjamin Herrenschmidt 
8487568cb4eSPaul Mackerras static void __devinit do_bus_setup(struct pci_bus *bus)
8497568cb4eSPaul Mackerras {
8507568cb4eSPaul Mackerras 	struct pci_dev *dev;
8517568cb4eSPaul Mackerras 
85212d04eefSBenjamin Herrenschmidt 	if (ppc_md.pci_dma_bus_setup)
85312d04eefSBenjamin Herrenschmidt 		ppc_md.pci_dma_bus_setup(bus);
8547568cb4eSPaul Mackerras 
8557568cb4eSPaul Mackerras 	list_for_each_entry(dev, &bus->devices, bus_list)
85612d04eefSBenjamin Herrenschmidt 		pcibios_setup_new_device(dev);
8577568cb4eSPaul Mackerras 
858f90bb153SBenjamin Herrenschmidt 	/* Read default IRQs and fixup if necessary */
859f90bb153SBenjamin Herrenschmidt 	list_for_each_entry(dev, &bus->devices, bus_list) {
860f90bb153SBenjamin Herrenschmidt 		pci_read_irq_line(dev);
861f90bb153SBenjamin Herrenschmidt 		if (ppc_md.pci_irq_fixup)
862f90bb153SBenjamin Herrenschmidt 			ppc_md.pci_irq_fixup(dev);
863f90bb153SBenjamin Herrenschmidt 	}
8647568cb4eSPaul Mackerras }
8657568cb4eSPaul Mackerras 
8667568cb4eSPaul Mackerras void __devinit pcibios_fixup_bus(struct pci_bus *bus)
8677568cb4eSPaul Mackerras {
8687568cb4eSPaul Mackerras 	struct pci_dev *dev = bus->self;
8694c9d2800SBenjamin Herrenschmidt 	struct device_node *np;
8704c9d2800SBenjamin Herrenschmidt 
8714c9d2800SBenjamin Herrenschmidt 	np = pci_bus_to_OF_node(bus);
8724c9d2800SBenjamin Herrenschmidt 
8734c9d2800SBenjamin Herrenschmidt 	DBG("pcibios_fixup_bus(%s)\n", np ? np->full_name : "<???>");
8747568cb4eSPaul Mackerras 
8757568cb4eSPaul Mackerras 	if (dev && pci_probe_only &&
8767568cb4eSPaul Mackerras 	    (dev->class >> 8) == PCI_CLASS_BRIDGE_PCI) {
8777568cb4eSPaul Mackerras 		/* This is a subordinate bridge */
8787568cb4eSPaul Mackerras 
8797568cb4eSPaul Mackerras 		pci_read_bridge_bases(bus);
8807568cb4eSPaul Mackerras 		pcibios_fixup_device_resources(dev, bus);
8817568cb4eSPaul Mackerras 	}
8827568cb4eSPaul Mackerras 
8837568cb4eSPaul Mackerras 	do_bus_setup(bus);
8847568cb4eSPaul Mackerras 
8857568cb4eSPaul Mackerras 	if (!pci_probe_only)
8867568cb4eSPaul Mackerras 		return;
8877568cb4eSPaul Mackerras 
8887568cb4eSPaul Mackerras 	list_for_each_entry(dev, &bus->devices, bus_list)
8897568cb4eSPaul Mackerras 		if ((dev->class >> 8) != PCI_CLASS_BRIDGE_PCI)
8907568cb4eSPaul Mackerras 			pcibios_fixup_device_resources(dev, bus);
8917568cb4eSPaul Mackerras }
8927568cb4eSPaul Mackerras EXPORT_SYMBOL(pcibios_fixup_bus);
8937568cb4eSPaul Mackerras 
894f2c4583aSBenjamin Herrenschmidt unsigned long pci_address_to_pio(phys_addr_t address)
895d4e4b352SStephen Rothwell {
896d4e4b352SStephen Rothwell 	struct pci_controller *hose, *tmp;
897d4e4b352SStephen Rothwell 
898d4e4b352SStephen Rothwell 	list_for_each_entry_safe(hose, tmp, &hose_list, list_node) {
899d4e4b352SStephen Rothwell 		if (address >= hose->io_base_phys &&
900f2c4583aSBenjamin Herrenschmidt 		    address < (hose->io_base_phys + hose->pci_io_size)) {
901f2c4583aSBenjamin Herrenschmidt 			unsigned long base =
9023d5134eeSBenjamin Herrenschmidt 				(unsigned long)hose->io_base_virt - _IO_BASE;
903f2c4583aSBenjamin Herrenschmidt 			return base + (address - hose->io_base_phys);
904f2c4583aSBenjamin Herrenschmidt 		}
905d4e4b352SStephen Rothwell 	}
906d4e4b352SStephen Rothwell 	return (unsigned int)-1;
907d4e4b352SStephen Rothwell }
908d4e4b352SStephen Rothwell EXPORT_SYMBOL_GPL(pci_address_to_pio);
909d4e4b352SStephen Rothwell 
9107568cb4eSPaul Mackerras 
9117568cb4eSPaul Mackerras #define IOBASE_BRIDGE_NUMBER	0
9127568cb4eSPaul Mackerras #define IOBASE_MEMORY		1
9137568cb4eSPaul Mackerras #define IOBASE_IO		2
9147568cb4eSPaul Mackerras #define IOBASE_ISA_IO		3
9157568cb4eSPaul Mackerras #define IOBASE_ISA_MEM		4
9167568cb4eSPaul Mackerras 
9177568cb4eSPaul Mackerras long sys_pciconfig_iobase(long which, unsigned long in_bus,
9187568cb4eSPaul Mackerras 			  unsigned long in_devfn)
9197568cb4eSPaul Mackerras {
9207568cb4eSPaul Mackerras 	struct pci_controller* hose;
9217568cb4eSPaul Mackerras 	struct list_head *ln;
9227568cb4eSPaul Mackerras 	struct pci_bus *bus = NULL;
9237568cb4eSPaul Mackerras 	struct device_node *hose_node;
9247568cb4eSPaul Mackerras 
9257568cb4eSPaul Mackerras 	/* Argh ! Please forgive me for that hack, but that's the
9267568cb4eSPaul Mackerras 	 * simplest way to get existing XFree to not lockup on some
9277568cb4eSPaul Mackerras 	 * G5 machines... So when something asks for bus 0 io base
9287568cb4eSPaul Mackerras 	 * (bus 0 is HT root), we return the AGP one instead.
9297568cb4eSPaul Mackerras 	 */
9307568cb4eSPaul Mackerras 	if (machine_is_compatible("MacRISC4"))
9317568cb4eSPaul Mackerras 		if (in_bus == 0)
9327568cb4eSPaul Mackerras 			in_bus = 0xf0;
9337568cb4eSPaul Mackerras 
9347568cb4eSPaul Mackerras 	/* That syscall isn't quite compatible with PCI domains, but it's
9357568cb4eSPaul Mackerras 	 * used on pre-domains setup. We return the first match
9367568cb4eSPaul Mackerras 	 */
9377568cb4eSPaul Mackerras 
9387568cb4eSPaul Mackerras 	for (ln = pci_root_buses.next; ln != &pci_root_buses; ln = ln->next) {
9397568cb4eSPaul Mackerras 		bus = pci_bus_b(ln);
940545da94fSBenjamin Herrenschmidt 		if (in_bus >= bus->number && in_bus <= bus->subordinate)
9417568cb4eSPaul Mackerras 			break;
9427568cb4eSPaul Mackerras 		bus = NULL;
9437568cb4eSPaul Mackerras 	}
9447568cb4eSPaul Mackerras 	if (bus == NULL || bus->sysdata == NULL)
9457568cb4eSPaul Mackerras 		return -ENODEV;
9467568cb4eSPaul Mackerras 
9477568cb4eSPaul Mackerras 	hose_node = (struct device_node *)bus->sysdata;
9487568cb4eSPaul Mackerras 	hose = PCI_DN(hose_node)->phb;
9497568cb4eSPaul Mackerras 
9507568cb4eSPaul Mackerras 	switch (which) {
9517568cb4eSPaul Mackerras 	case IOBASE_BRIDGE_NUMBER:
9527568cb4eSPaul Mackerras 		return (long)hose->first_busno;
9537568cb4eSPaul Mackerras 	case IOBASE_MEMORY:
9547568cb4eSPaul Mackerras 		return (long)hose->pci_mem_offset;
9557568cb4eSPaul Mackerras 	case IOBASE_IO:
9567568cb4eSPaul Mackerras 		return (long)hose->io_base_phys;
9577568cb4eSPaul Mackerras 	case IOBASE_ISA_IO:
9587568cb4eSPaul Mackerras 		return (long)isa_io_base;
9597568cb4eSPaul Mackerras 	case IOBASE_ISA_MEM:
9607568cb4eSPaul Mackerras 		return -EINVAL;
9617568cb4eSPaul Mackerras 	}
9627568cb4eSPaul Mackerras 
9637568cb4eSPaul Mackerras 	return -EOPNOTSUPP;
9647568cb4eSPaul Mackerras }
965357518faSAnton Blanchard 
966357518faSAnton Blanchard #ifdef CONFIG_NUMA
967357518faSAnton Blanchard int pcibus_to_node(struct pci_bus *bus)
968357518faSAnton Blanchard {
969357518faSAnton Blanchard 	struct pci_controller *phb = pci_bus_to_host(bus);
970357518faSAnton Blanchard 	return phb->node;
971357518faSAnton Blanchard }
972357518faSAnton Blanchard EXPORT_SYMBOL(pcibus_to_node);
973357518faSAnton Blanchard #endif
974