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; 437568cb4eSPaul Mackerras 447568cb4eSPaul Mackerras /* pci_io_base -- the base address from which io bars are offsets. 457568cb4eSPaul Mackerras * This is the lowest I/O base address (so bar values are always positive), 467568cb4eSPaul Mackerras * and it *must* be the start of ISA space if an ISA bus exists because 473d5134eeSBenjamin Herrenschmidt * ISA drivers use hard coded offsets. If no ISA bus exists nothing 483d5134eeSBenjamin Herrenschmidt * is mapped on the first 64K of IO space 497568cb4eSPaul Mackerras */ 503d5134eeSBenjamin Herrenschmidt unsigned long pci_io_base = ISA_IO_BASE; 517568cb4eSPaul Mackerras EXPORT_SYMBOL(pci_io_base); 527568cb4eSPaul Mackerras 537568cb4eSPaul Mackerras LIST_HEAD(hose_list); 547568cb4eSPaul Mackerras 557568cb4eSPaul Mackerras static void fixup_broken_pcnet32(struct pci_dev* dev) 567568cb4eSPaul Mackerras { 577568cb4eSPaul Mackerras if ((dev->class>>8 == PCI_CLASS_NETWORK_ETHERNET)) { 587568cb4eSPaul Mackerras dev->vendor = PCI_VENDOR_ID_AMD; 597568cb4eSPaul Mackerras pci_write_config_word(dev, PCI_VENDOR_ID, PCI_VENDOR_ID_AMD); 607568cb4eSPaul Mackerras } 617568cb4eSPaul Mackerras } 627568cb4eSPaul Mackerras DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_TRIDENT, PCI_ANY_ID, fixup_broken_pcnet32); 637568cb4eSPaul Mackerras 647568cb4eSPaul Mackerras 657568cb4eSPaul Mackerras static u32 get_int_prop(struct device_node *np, const char *name, u32 def) 667568cb4eSPaul Mackerras { 67a7f67bdfSJeremy Kerr const u32 *prop; 687568cb4eSPaul Mackerras int len; 697568cb4eSPaul Mackerras 70e2eb6392SStephen Rothwell prop = of_get_property(np, name, &len); 717568cb4eSPaul Mackerras if (prop && len >= 4) 727568cb4eSPaul Mackerras return *prop; 737568cb4eSPaul Mackerras return def; 747568cb4eSPaul Mackerras } 757568cb4eSPaul Mackerras 767568cb4eSPaul Mackerras static unsigned int pci_parse_of_flags(u32 addr0) 777568cb4eSPaul Mackerras { 787568cb4eSPaul Mackerras unsigned int flags = 0; 797568cb4eSPaul Mackerras 807568cb4eSPaul Mackerras if (addr0 & 0x02000000) { 817568cb4eSPaul Mackerras flags = IORESOURCE_MEM | PCI_BASE_ADDRESS_SPACE_MEMORY; 827568cb4eSPaul Mackerras flags |= (addr0 >> 22) & PCI_BASE_ADDRESS_MEM_TYPE_64; 837568cb4eSPaul Mackerras flags |= (addr0 >> 28) & PCI_BASE_ADDRESS_MEM_TYPE_1M; 847568cb4eSPaul Mackerras if (addr0 & 0x40000000) 857568cb4eSPaul Mackerras flags |= IORESOURCE_PREFETCH 867568cb4eSPaul Mackerras | PCI_BASE_ADDRESS_MEM_PREFETCH; 877568cb4eSPaul Mackerras } else if (addr0 & 0x01000000) 887568cb4eSPaul Mackerras flags = IORESOURCE_IO | PCI_BASE_ADDRESS_SPACE_IO; 897568cb4eSPaul Mackerras return flags; 907568cb4eSPaul Mackerras } 917568cb4eSPaul Mackerras 927568cb4eSPaul Mackerras 937568cb4eSPaul Mackerras static void pci_parse_of_addrs(struct device_node *node, struct pci_dev *dev) 947568cb4eSPaul Mackerras { 957568cb4eSPaul Mackerras u64 base, size; 967568cb4eSPaul Mackerras unsigned int flags; 977568cb4eSPaul Mackerras struct resource *res; 98a7f67bdfSJeremy Kerr const u32 *addrs; 99a7f67bdfSJeremy Kerr u32 i; 1007568cb4eSPaul Mackerras int proplen; 1017568cb4eSPaul Mackerras 102e2eb6392SStephen Rothwell addrs = of_get_property(node, "assigned-addresses", &proplen); 1037568cb4eSPaul Mackerras if (!addrs) 1047568cb4eSPaul Mackerras return; 1051beb6a7dSBenjamin Herrenschmidt DBG(" parse addresses (%d bytes) @ %p\n", proplen, addrs); 1067568cb4eSPaul Mackerras for (; proplen >= 20; proplen -= 20, addrs += 5) { 1077568cb4eSPaul Mackerras flags = pci_parse_of_flags(addrs[0]); 1087568cb4eSPaul Mackerras if (!flags) 1097568cb4eSPaul Mackerras continue; 110327e22dfSJon Loeliger base = of_read_number(&addrs[1], 2); 111327e22dfSJon Loeliger size = of_read_number(&addrs[3], 2); 1127568cb4eSPaul Mackerras if (!size) 1137568cb4eSPaul Mackerras continue; 1147568cb4eSPaul Mackerras i = addrs[0] & 0xff; 1151beb6a7dSBenjamin Herrenschmidt DBG(" base: %llx, size: %llx, i: %x\n", 1161beb6a7dSBenjamin Herrenschmidt (unsigned long long)base, (unsigned long long)size, i); 1171beb6a7dSBenjamin Herrenschmidt 1187568cb4eSPaul Mackerras if (PCI_BASE_ADDRESS_0 <= i && i <= PCI_BASE_ADDRESS_5) { 1197568cb4eSPaul Mackerras res = &dev->resource[(i - PCI_BASE_ADDRESS_0) >> 2]; 1207568cb4eSPaul Mackerras } else if (i == dev->rom_base_reg) { 1217568cb4eSPaul Mackerras res = &dev->resource[PCI_ROM_RESOURCE]; 1227568cb4eSPaul Mackerras flags |= IORESOURCE_READONLY | IORESOURCE_CACHEABLE; 1237568cb4eSPaul Mackerras } else { 1247568cb4eSPaul Mackerras printk(KERN_ERR "PCI: bad cfg reg num 0x%x\n", i); 1257568cb4eSPaul Mackerras continue; 1267568cb4eSPaul Mackerras } 1277568cb4eSPaul Mackerras res->start = base; 1287568cb4eSPaul Mackerras res->end = base + size - 1; 1297568cb4eSPaul Mackerras res->flags = flags; 1307568cb4eSPaul Mackerras res->name = pci_name(dev); 1317568cb4eSPaul Mackerras } 1327568cb4eSPaul Mackerras } 1337568cb4eSPaul Mackerras 1347568cb4eSPaul Mackerras struct pci_dev *of_create_pci_dev(struct device_node *node, 1357568cb4eSPaul Mackerras struct pci_bus *bus, int devfn) 1367568cb4eSPaul Mackerras { 1377568cb4eSPaul Mackerras struct pci_dev *dev; 1387568cb4eSPaul Mackerras const char *type; 1397568cb4eSPaul Mackerras 140bab41e9bSMichael Ellerman dev = alloc_pci_dev(); 1417568cb4eSPaul Mackerras if (!dev) 1427568cb4eSPaul Mackerras return NULL; 143e2eb6392SStephen Rothwell type = of_get_property(node, "device_type", NULL); 1447568cb4eSPaul Mackerras if (type == NULL) 1457568cb4eSPaul Mackerras type = ""; 1467568cb4eSPaul Mackerras 1471beb6a7dSBenjamin Herrenschmidt DBG(" create device, devfn: %x, type: %s\n", devfn, type); 1481beb6a7dSBenjamin Herrenschmidt 1497568cb4eSPaul Mackerras dev->bus = bus; 1507568cb4eSPaul Mackerras dev->sysdata = node; 1517568cb4eSPaul Mackerras dev->dev.parent = bus->bridge; 1527568cb4eSPaul Mackerras dev->dev.bus = &pci_bus_type; 1537568cb4eSPaul Mackerras dev->devfn = devfn; 1547568cb4eSPaul Mackerras dev->multifunction = 0; /* maybe a lie? */ 1557568cb4eSPaul Mackerras 1567568cb4eSPaul Mackerras dev->vendor = get_int_prop(node, "vendor-id", 0xffff); 1577568cb4eSPaul Mackerras dev->device = get_int_prop(node, "device-id", 0xffff); 1587568cb4eSPaul Mackerras dev->subsystem_vendor = get_int_prop(node, "subsystem-vendor-id", 0); 1597568cb4eSPaul Mackerras dev->subsystem_device = get_int_prop(node, "subsystem-id", 0); 1607568cb4eSPaul Mackerras 1619d17a5c6SBenjamin Herrenschmidt dev->cfg_size = pci_cfg_space_size(dev); 1627568cb4eSPaul Mackerras 163420b5eeaSStephen Rothwell dev_set_name(&dev->dev, "%04x:%02x:%02x.%d", pci_domain_nr(bus), 1647568cb4eSPaul Mackerras dev->bus->number, PCI_SLOT(devfn), PCI_FUNC(devfn)); 1657568cb4eSPaul Mackerras dev->class = get_int_prop(node, "class-code", 0); 166b8a3a521SAuke Kok dev->revision = get_int_prop(node, "revision-id", 0); 1677568cb4eSPaul Mackerras 1681beb6a7dSBenjamin Herrenschmidt DBG(" class: 0x%x\n", dev->class); 169b8a3a521SAuke Kok DBG(" revision: 0x%x\n", dev->revision); 1701beb6a7dSBenjamin Herrenschmidt 1717568cb4eSPaul Mackerras dev->current_state = 4; /* unknown power state */ 172bb63ab13SLinas Vepstas dev->error_state = pci_channel_io_normal; 1738f2ea1fdSBenjamin Herrenschmidt dev->dma_mask = 0xffffffff; 1747568cb4eSPaul Mackerras 175bb53bb3dSJake Moilanen if (!strcmp(type, "pci") || !strcmp(type, "pciex")) { 1767568cb4eSPaul Mackerras /* a PCI-PCI bridge */ 1777568cb4eSPaul Mackerras dev->hdr_type = PCI_HEADER_TYPE_BRIDGE; 1787568cb4eSPaul Mackerras dev->rom_base_reg = PCI_ROM_ADDRESS1; 1797568cb4eSPaul Mackerras } else if (!strcmp(type, "cardbus")) { 1807568cb4eSPaul Mackerras dev->hdr_type = PCI_HEADER_TYPE_CARDBUS; 1817568cb4eSPaul Mackerras } else { 1827568cb4eSPaul Mackerras dev->hdr_type = PCI_HEADER_TYPE_NORMAL; 1837568cb4eSPaul Mackerras dev->rom_base_reg = PCI_ROM_ADDRESS; 1840ebfff14SBenjamin Herrenschmidt /* Maybe do a default OF mapping here */ 1857568cb4eSPaul Mackerras dev->irq = NO_IRQ; 1867568cb4eSPaul Mackerras } 1877568cb4eSPaul Mackerras 1887568cb4eSPaul Mackerras pci_parse_of_addrs(node, dev); 1897568cb4eSPaul Mackerras 1901beb6a7dSBenjamin Herrenschmidt DBG(" adding to system ...\n"); 1911beb6a7dSBenjamin Herrenschmidt 1927568cb4eSPaul Mackerras pci_device_add(dev, bus); 1937568cb4eSPaul Mackerras 1947568cb4eSPaul Mackerras return dev; 1957568cb4eSPaul Mackerras } 1967568cb4eSPaul Mackerras EXPORT_SYMBOL(of_create_pci_dev); 1977568cb4eSPaul Mackerras 1987568cb4eSPaul Mackerras void __devinit of_scan_bus(struct device_node *node, 1997568cb4eSPaul Mackerras struct pci_bus *bus) 2007568cb4eSPaul Mackerras { 20185e99b9fSStephen Rothwell struct device_node *child; 202a7f67bdfSJeremy Kerr const u32 *reg; 2037568cb4eSPaul Mackerras int reglen, devfn; 2047568cb4eSPaul Mackerras struct pci_dev *dev; 2057568cb4eSPaul Mackerras 2061beb6a7dSBenjamin Herrenschmidt DBG("of_scan_bus(%s) bus no %d... \n", node->full_name, bus->number); 2071beb6a7dSBenjamin Herrenschmidt 208bf5e2ba2SBenjamin Herrenschmidt /* Scan direct children */ 20985e99b9fSStephen Rothwell for_each_child_of_node(node, child) { 2101beb6a7dSBenjamin Herrenschmidt DBG(" * %s\n", child->full_name); 211e2eb6392SStephen Rothwell reg = of_get_property(child, "reg", ®len); 2127568cb4eSPaul Mackerras if (reg == NULL || reglen < 20) 2137568cb4eSPaul Mackerras continue; 2147568cb4eSPaul Mackerras devfn = (reg[0] >> 8) & 0xff; 2151beb6a7dSBenjamin Herrenschmidt 2167568cb4eSPaul Mackerras /* create a new pci_dev for this device */ 2177568cb4eSPaul Mackerras dev = of_create_pci_dev(child, bus, devfn); 2187568cb4eSPaul Mackerras if (!dev) 2197568cb4eSPaul Mackerras continue; 2201beb6a7dSBenjamin Herrenschmidt DBG(" dev header type: %x\n", dev->hdr_type); 2217568cb4eSPaul Mackerras } 2227568cb4eSPaul Mackerras 223bf5e2ba2SBenjamin Herrenschmidt /* Ally all fixups */ 224bf5e2ba2SBenjamin Herrenschmidt pcibios_fixup_of_probed_bus(bus); 225bf5e2ba2SBenjamin Herrenschmidt 226bf5e2ba2SBenjamin Herrenschmidt /* Now scan child busses */ 227bf5e2ba2SBenjamin Herrenschmidt list_for_each_entry(dev, &bus->devices, bus_list) { 228bf5e2ba2SBenjamin Herrenschmidt if (dev->hdr_type == PCI_HEADER_TYPE_BRIDGE || 229bf5e2ba2SBenjamin Herrenschmidt dev->hdr_type == PCI_HEADER_TYPE_CARDBUS) { 230bf5e2ba2SBenjamin Herrenschmidt struct device_node *child = pci_device_to_OF_node(dev); 231bf5e2ba2SBenjamin Herrenschmidt if (dev) 232bf5e2ba2SBenjamin Herrenschmidt of_scan_pci_bridge(child, dev); 233bf5e2ba2SBenjamin Herrenschmidt } 234bf5e2ba2SBenjamin Herrenschmidt } 2357568cb4eSPaul Mackerras } 2367568cb4eSPaul Mackerras EXPORT_SYMBOL(of_scan_bus); 2377568cb4eSPaul Mackerras 2387568cb4eSPaul Mackerras void __devinit of_scan_pci_bridge(struct device_node *node, 2397568cb4eSPaul Mackerras struct pci_dev *dev) 2407568cb4eSPaul Mackerras { 2417568cb4eSPaul Mackerras struct pci_bus *bus; 242a7f67bdfSJeremy Kerr const u32 *busrange, *ranges; 2437568cb4eSPaul Mackerras int len, i, mode; 2447568cb4eSPaul Mackerras struct resource *res; 2457568cb4eSPaul Mackerras unsigned int flags; 2467568cb4eSPaul Mackerras u64 size; 2477568cb4eSPaul Mackerras 2481beb6a7dSBenjamin Herrenschmidt DBG("of_scan_pci_bridge(%s)\n", node->full_name); 2491beb6a7dSBenjamin Herrenschmidt 2507568cb4eSPaul Mackerras /* parse bus-range property */ 251e2eb6392SStephen Rothwell busrange = of_get_property(node, "bus-range", &len); 2527568cb4eSPaul Mackerras if (busrange == NULL || len != 8) { 2531beb6a7dSBenjamin Herrenschmidt printk(KERN_DEBUG "Can't get bus-range for PCI-PCI bridge %s\n", 2547568cb4eSPaul Mackerras node->full_name); 2557568cb4eSPaul Mackerras return; 2567568cb4eSPaul Mackerras } 257e2eb6392SStephen Rothwell ranges = of_get_property(node, "ranges", &len); 2587568cb4eSPaul Mackerras if (ranges == NULL) { 2591beb6a7dSBenjamin Herrenschmidt printk(KERN_DEBUG "Can't get ranges for PCI-PCI bridge %s\n", 2607568cb4eSPaul Mackerras node->full_name); 2617568cb4eSPaul Mackerras return; 2627568cb4eSPaul Mackerras } 2637568cb4eSPaul Mackerras 2647568cb4eSPaul Mackerras bus = pci_add_new_bus(dev->bus, dev, busrange[0]); 2657568cb4eSPaul Mackerras if (!bus) { 2667568cb4eSPaul Mackerras printk(KERN_ERR "Failed to create pci bus for %s\n", 2677568cb4eSPaul Mackerras node->full_name); 2687568cb4eSPaul Mackerras return; 2697568cb4eSPaul Mackerras } 2707568cb4eSPaul Mackerras 2717568cb4eSPaul Mackerras bus->primary = dev->bus->number; 2727568cb4eSPaul Mackerras bus->subordinate = busrange[1]; 2737568cb4eSPaul Mackerras bus->bridge_ctl = 0; 2747568cb4eSPaul Mackerras bus->sysdata = node; 2757568cb4eSPaul Mackerras 2767568cb4eSPaul Mackerras /* parse ranges property */ 2777568cb4eSPaul Mackerras /* PCI #address-cells == 3 and #size-cells == 2 always */ 2787568cb4eSPaul Mackerras res = &dev->resource[PCI_BRIDGE_RESOURCES]; 2797568cb4eSPaul Mackerras for (i = 0; i < PCI_NUM_RESOURCES - PCI_BRIDGE_RESOURCES; ++i) { 2807568cb4eSPaul Mackerras res->flags = 0; 2817568cb4eSPaul Mackerras bus->resource[i] = res; 2827568cb4eSPaul Mackerras ++res; 2837568cb4eSPaul Mackerras } 2847568cb4eSPaul Mackerras i = 1; 2857568cb4eSPaul Mackerras for (; len >= 32; len -= 32, ranges += 8) { 2867568cb4eSPaul Mackerras flags = pci_parse_of_flags(ranges[0]); 287327e22dfSJon Loeliger size = of_read_number(&ranges[6], 2); 2887568cb4eSPaul Mackerras if (flags == 0 || size == 0) 2897568cb4eSPaul Mackerras continue; 2907568cb4eSPaul Mackerras if (flags & IORESOURCE_IO) { 2917568cb4eSPaul Mackerras res = bus->resource[0]; 2927568cb4eSPaul Mackerras if (res->flags) { 2937568cb4eSPaul Mackerras printk(KERN_ERR "PCI: ignoring extra I/O range" 2947568cb4eSPaul Mackerras " for bridge %s\n", node->full_name); 2957568cb4eSPaul Mackerras continue; 2967568cb4eSPaul Mackerras } 2977568cb4eSPaul Mackerras } else { 2987568cb4eSPaul Mackerras if (i >= PCI_NUM_RESOURCES - PCI_BRIDGE_RESOURCES) { 2997568cb4eSPaul Mackerras printk(KERN_ERR "PCI: too many memory ranges" 3007568cb4eSPaul Mackerras " for bridge %s\n", node->full_name); 3017568cb4eSPaul Mackerras continue; 3027568cb4eSPaul Mackerras } 3037568cb4eSPaul Mackerras res = bus->resource[i]; 3047568cb4eSPaul Mackerras ++i; 3057568cb4eSPaul Mackerras } 306327e22dfSJon Loeliger res->start = of_read_number(&ranges[1], 2); 3077568cb4eSPaul Mackerras res->end = res->start + size - 1; 3087568cb4eSPaul Mackerras res->flags = flags; 3097568cb4eSPaul Mackerras } 3107568cb4eSPaul Mackerras sprintf(bus->name, "PCI Bus %04x:%02x", pci_domain_nr(bus), 3117568cb4eSPaul Mackerras bus->number); 3121beb6a7dSBenjamin Herrenschmidt DBG(" bus name: %s\n", bus->name); 3137568cb4eSPaul Mackerras 3147568cb4eSPaul Mackerras mode = PCI_PROBE_NORMAL; 3157568cb4eSPaul Mackerras if (ppc_md.pci_probe_mode) 3167568cb4eSPaul Mackerras mode = ppc_md.pci_probe_mode(bus); 3171beb6a7dSBenjamin Herrenschmidt DBG(" probe mode: %d\n", mode); 3181beb6a7dSBenjamin Herrenschmidt 3197568cb4eSPaul Mackerras if (mode == PCI_PROBE_DEVTREE) 3207568cb4eSPaul Mackerras of_scan_bus(node, bus); 3217568cb4eSPaul Mackerras else if (mode == PCI_PROBE_NORMAL) 3227568cb4eSPaul Mackerras pci_scan_child_bus(bus); 3237568cb4eSPaul Mackerras } 3247568cb4eSPaul Mackerras EXPORT_SYMBOL(of_scan_pci_bridge); 3257568cb4eSPaul Mackerras 3267568cb4eSPaul Mackerras void __devinit scan_phb(struct pci_controller *hose) 3277568cb4eSPaul Mackerras { 3287568cb4eSPaul Mackerras struct pci_bus *bus; 32944ef3390SStephen Rothwell struct device_node *node = hose->dn; 3307568cb4eSPaul Mackerras int i, mode; 3317568cb4eSPaul Mackerras 33250c9bc2fSBenjamin Herrenschmidt DBG("PCI: Scanning PHB %s\n", node ? node->full_name : "<NO NAME>"); 3331beb6a7dSBenjamin Herrenschmidt 3343fd94c6bSBenjamin Herrenschmidt /* Create an empty bus for the toplevel */ 335803d4573SBenjamin Herrenschmidt bus = pci_create_bus(hose->parent, hose->first_busno, hose->ops, node); 3367568cb4eSPaul Mackerras if (bus == NULL) { 3377568cb4eSPaul Mackerras printk(KERN_ERR "Failed to create bus for PCI domain %04x\n", 3387568cb4eSPaul Mackerras hose->global_number); 3397568cb4eSPaul Mackerras return; 3407568cb4eSPaul Mackerras } 3417568cb4eSPaul Mackerras bus->secondary = hose->first_busno; 3427568cb4eSPaul Mackerras hose->bus = bus; 3437568cb4eSPaul Mackerras 3443fd94c6bSBenjamin Herrenschmidt /* Get some IO space for the new PHB */ 3453d5134eeSBenjamin Herrenschmidt pcibios_map_io_space(bus); 3463d5134eeSBenjamin Herrenschmidt 3473fd94c6bSBenjamin Herrenschmidt /* Wire up PHB bus resources */ 34850c9bc2fSBenjamin Herrenschmidt DBG("PCI: PHB IO resource = %016lx-%016lx [%lx]\n", 34950c9bc2fSBenjamin Herrenschmidt hose->io_resource.start, hose->io_resource.end, 35050c9bc2fSBenjamin Herrenschmidt hose->io_resource.flags); 3519d5f4928SBenjamin Herrenschmidt bus->resource[0] = &hose->io_resource; 35250c9bc2fSBenjamin Herrenschmidt for (i = 0; i < 3; ++i) { 35350c9bc2fSBenjamin Herrenschmidt DBG("PCI: PHB MEM resource %d = %016lx-%016lx [%lx]\n", i, 35450c9bc2fSBenjamin Herrenschmidt hose->mem_resources[i].start, 35550c9bc2fSBenjamin Herrenschmidt hose->mem_resources[i].end, 35650c9bc2fSBenjamin Herrenschmidt hose->mem_resources[i].flags); 3573fd94c6bSBenjamin Herrenschmidt bus->resource[i+1] = &hose->mem_resources[i]; 35850c9bc2fSBenjamin Herrenschmidt } 35950c9bc2fSBenjamin Herrenschmidt DBG("PCI: PHB MEM offset = %016lx\n", hose->pci_mem_offset); 36050c9bc2fSBenjamin Herrenschmidt DBG("PCI: PHB IO offset = %08lx\n", 36150c9bc2fSBenjamin Herrenschmidt (unsigned long)hose->io_base_virt - _IO_BASE); 3627568cb4eSPaul Mackerras 3633fd94c6bSBenjamin Herrenschmidt /* Get probe mode and perform scan */ 3647568cb4eSPaul Mackerras mode = PCI_PROBE_NORMAL; 3651beb6a7dSBenjamin Herrenschmidt if (node && ppc_md.pci_probe_mode) 3667568cb4eSPaul Mackerras mode = ppc_md.pci_probe_mode(bus); 3671beb6a7dSBenjamin Herrenschmidt DBG(" probe mode: %d\n", mode); 3687568cb4eSPaul Mackerras if (mode == PCI_PROBE_DEVTREE) { 3697568cb4eSPaul Mackerras bus->subordinate = hose->last_busno; 3707568cb4eSPaul Mackerras of_scan_bus(node, bus); 3717568cb4eSPaul Mackerras } 37299a565baSs.hauer@pengutronix.de 3737568cb4eSPaul Mackerras if (mode == PCI_PROBE_NORMAL) 3747568cb4eSPaul Mackerras hose->last_busno = bus->subordinate = pci_scan_child_bus(bus); 3757568cb4eSPaul Mackerras } 3767568cb4eSPaul Mackerras 3777568cb4eSPaul Mackerras static int __init pcibios_init(void) 3787568cb4eSPaul Mackerras { 3797568cb4eSPaul Mackerras struct pci_controller *hose, *tmp; 3807568cb4eSPaul Mackerras 3813fd94c6bSBenjamin Herrenschmidt printk(KERN_INFO "PCI: Probing PCI hardware\n"); 3823fd94c6bSBenjamin Herrenschmidt 3837568cb4eSPaul Mackerras /* For now, override phys_mem_access_prot. If we need it, 3847568cb4eSPaul Mackerras * later, we may move that initialization to each ppc_md 3857568cb4eSPaul Mackerras */ 3867568cb4eSPaul Mackerras ppc_md.phys_mem_access_prot = pci_phys_mem_access_prot; 3877568cb4eSPaul Mackerras 3883fd94c6bSBenjamin Herrenschmidt if (pci_probe_only) 3893fd94c6bSBenjamin Herrenschmidt ppc_pci_flags |= PPC_PCI_PROBE_ONLY; 3907568cb4eSPaul Mackerras 391*1fd0f525SBenjamin Herrenschmidt /* On ppc64, we always enable PCI domains and we keep domain 0 392*1fd0f525SBenjamin Herrenschmidt * backward compatible in /proc for video cards 393*1fd0f525SBenjamin Herrenschmidt */ 394*1fd0f525SBenjamin Herrenschmidt ppc_pci_flags |= PPC_PCI_ENABLE_PROC_DOMAINS | PPC_PCI_COMPAT_DOMAIN_0; 395*1fd0f525SBenjamin Herrenschmidt 3967568cb4eSPaul Mackerras /* Scan all of the recorded PCI controllers. */ 39792eb4602SJohn Rose list_for_each_entry_safe(hose, tmp, &hose_list, list_node) { 3987568cb4eSPaul Mackerras scan_phb(hose); 39992eb4602SJohn Rose pci_bus_add_devices(hose->bus); 40092eb4602SJohn Rose } 4017568cb4eSPaul Mackerras 4023fd94c6bSBenjamin Herrenschmidt /* Call common code to handle resource allocation */ 4033fd94c6bSBenjamin Herrenschmidt pcibios_resource_survey(); 4047568cb4eSPaul Mackerras 405e884e9c5SOlof Johansson printk(KERN_DEBUG "PCI: Probing PCI hardware done\n"); 4067568cb4eSPaul Mackerras 4077568cb4eSPaul Mackerras return 0; 4087568cb4eSPaul Mackerras } 4097568cb4eSPaul Mackerras 4107568cb4eSPaul Mackerras subsys_initcall(pcibios_init); 4117568cb4eSPaul Mackerras 4123d5134eeSBenjamin Herrenschmidt #ifdef CONFIG_HOTPLUG 4133d5134eeSBenjamin Herrenschmidt 4143d5134eeSBenjamin Herrenschmidt int pcibios_unmap_io_space(struct pci_bus *bus) 4157568cb4eSPaul Mackerras { 4163d5134eeSBenjamin Herrenschmidt struct pci_controller *hose; 4177568cb4eSPaul Mackerras 4183d5134eeSBenjamin Herrenschmidt WARN_ON(bus == NULL); 419de821204SBenjamin Herrenschmidt 4203d5134eeSBenjamin Herrenschmidt /* If this is not a PHB, we only flush the hash table over 4213d5134eeSBenjamin Herrenschmidt * the area mapped by this bridge. We don't play with the PTE 4223d5134eeSBenjamin Herrenschmidt * mappings since we might have to deal with sub-page alignemnts 4233d5134eeSBenjamin Herrenschmidt * so flushing the hash table is the only sane way to make sure 4243d5134eeSBenjamin Herrenschmidt * that no hash entries are covering that removed bridge area 4253d5134eeSBenjamin Herrenschmidt * while still allowing other busses overlapping those pages 426de821204SBenjamin Herrenschmidt */ 4273d5134eeSBenjamin Herrenschmidt if (bus->self) { 4283d5134eeSBenjamin Herrenschmidt struct resource *res = bus->resource[0]; 4293d5134eeSBenjamin Herrenschmidt 4303d5134eeSBenjamin Herrenschmidt DBG("IO unmapping for PCI-PCI bridge %s\n", 4313d5134eeSBenjamin Herrenschmidt pci_name(bus->self)); 4323d5134eeSBenjamin Herrenschmidt 4333d5134eeSBenjamin Herrenschmidt __flush_hash_table_range(&init_mm, res->start + _IO_BASE, 434b30115eaSBenjamin Herrenschmidt res->end + _IO_BASE + 1); 4353d5134eeSBenjamin Herrenschmidt return 0; 4367568cb4eSPaul Mackerras } 4377568cb4eSPaul Mackerras 4383d5134eeSBenjamin Herrenschmidt /* Get the host bridge */ 4393d5134eeSBenjamin Herrenschmidt hose = pci_bus_to_host(bus); 4403d5134eeSBenjamin Herrenschmidt 4413d5134eeSBenjamin Herrenschmidt /* Check if we have IOs allocated */ 4423d5134eeSBenjamin Herrenschmidt if (hose->io_base_alloc == 0) 4433d5134eeSBenjamin Herrenschmidt return 0; 4443d5134eeSBenjamin Herrenschmidt 44544ef3390SStephen Rothwell DBG("IO unmapping for PHB %s\n", hose->dn->full_name); 4463d5134eeSBenjamin Herrenschmidt DBG(" alloc=0x%p\n", hose->io_base_alloc); 4473d5134eeSBenjamin Herrenschmidt 4483d5134eeSBenjamin Herrenschmidt /* This is a PHB, we fully unmap the IO area */ 4493d5134eeSBenjamin Herrenschmidt vunmap(hose->io_base_alloc); 4503d5134eeSBenjamin Herrenschmidt 4513d5134eeSBenjamin Herrenschmidt return 0; 4523d5134eeSBenjamin Herrenschmidt } 4533d5134eeSBenjamin Herrenschmidt EXPORT_SYMBOL_GPL(pcibios_unmap_io_space); 4543d5134eeSBenjamin Herrenschmidt 4553d5134eeSBenjamin Herrenschmidt #endif /* CONFIG_HOTPLUG */ 4563d5134eeSBenjamin Herrenschmidt 4573d5134eeSBenjamin Herrenschmidt int __devinit pcibios_map_io_space(struct pci_bus *bus) 4587568cb4eSPaul Mackerras { 4593d5134eeSBenjamin Herrenschmidt struct vm_struct *area; 4603d5134eeSBenjamin Herrenschmidt unsigned long phys_page; 4613d5134eeSBenjamin Herrenschmidt unsigned long size_page; 4627568cb4eSPaul Mackerras unsigned long io_virt_offset; 4633d5134eeSBenjamin Herrenschmidt struct pci_controller *hose; 4647568cb4eSPaul Mackerras 4653d5134eeSBenjamin Herrenschmidt WARN_ON(bus == NULL); 466de821204SBenjamin Herrenschmidt 4673d5134eeSBenjamin Herrenschmidt /* If this not a PHB, nothing to do, page tables still exist and 4683d5134eeSBenjamin Herrenschmidt * thus HPTEs will be faulted in when needed 4693d5134eeSBenjamin Herrenschmidt */ 4703d5134eeSBenjamin Herrenschmidt if (bus->self) { 4713d5134eeSBenjamin Herrenschmidt DBG("IO mapping for PCI-PCI bridge %s\n", 4723d5134eeSBenjamin Herrenschmidt pci_name(bus->self)); 4733d5134eeSBenjamin Herrenschmidt DBG(" virt=0x%016lx...0x%016lx\n", 4743d5134eeSBenjamin Herrenschmidt bus->resource[0]->start + _IO_BASE, 4753d5134eeSBenjamin Herrenschmidt bus->resource[0]->end + _IO_BASE); 4767568cb4eSPaul Mackerras return 0; 4777568cb4eSPaul Mackerras } 4787568cb4eSPaul Mackerras 4793d5134eeSBenjamin Herrenschmidt /* Get the host bridge */ 4803d5134eeSBenjamin Herrenschmidt hose = pci_bus_to_host(bus); 4813d5134eeSBenjamin Herrenschmidt phys_page = _ALIGN_DOWN(hose->io_base_phys, PAGE_SIZE); 4823d5134eeSBenjamin Herrenschmidt size_page = _ALIGN_UP(hose->pci_io_size, PAGE_SIZE); 4837568cb4eSPaul Mackerras 4843d5134eeSBenjamin Herrenschmidt /* Make sure IO area address is clear */ 4853d5134eeSBenjamin Herrenschmidt hose->io_base_alloc = NULL; 4867568cb4eSPaul Mackerras 4873d5134eeSBenjamin Herrenschmidt /* If there's no IO to map on that bus, get away too */ 4883d5134eeSBenjamin Herrenschmidt if (hose->pci_io_size == 0 || hose->io_base_phys == 0) 4893d5134eeSBenjamin Herrenschmidt return 0; 4903d5134eeSBenjamin Herrenschmidt 4913d5134eeSBenjamin Herrenschmidt /* Let's allocate some IO space for that guy. We don't pass 4923d5134eeSBenjamin Herrenschmidt * VM_IOREMAP because we don't care about alignment tricks that 4933d5134eeSBenjamin Herrenschmidt * the core does in that case. Maybe we should due to stupid card 4943d5134eeSBenjamin Herrenschmidt * with incomplete address decoding but I'd rather not deal with 4953d5134eeSBenjamin Herrenschmidt * those outside of the reserved 64K legacy region. 4963d5134eeSBenjamin Herrenschmidt */ 4973d5134eeSBenjamin Herrenschmidt area = __get_vm_area(size_page, 0, PHB_IO_BASE, PHB_IO_END); 4983d5134eeSBenjamin Herrenschmidt if (area == NULL) 4993d5134eeSBenjamin Herrenschmidt return -ENOMEM; 5003d5134eeSBenjamin Herrenschmidt hose->io_base_alloc = area->addr; 5013d5134eeSBenjamin Herrenschmidt hose->io_base_virt = (void __iomem *)(area->addr + 5023d5134eeSBenjamin Herrenschmidt hose->io_base_phys - phys_page); 5033d5134eeSBenjamin Herrenschmidt 50444ef3390SStephen Rothwell DBG("IO mapping for PHB %s\n", hose->dn->full_name); 5053d5134eeSBenjamin Herrenschmidt DBG(" phys=0x%016lx, virt=0x%p (alloc=0x%p)\n", 5063d5134eeSBenjamin Herrenschmidt hose->io_base_phys, hose->io_base_virt, hose->io_base_alloc); 5073d5134eeSBenjamin Herrenschmidt DBG(" size=0x%016lx (alloc=0x%016lx)\n", 5083d5134eeSBenjamin Herrenschmidt hose->pci_io_size, size_page); 5093d5134eeSBenjamin Herrenschmidt 5103d5134eeSBenjamin Herrenschmidt /* Establish the mapping */ 5113d5134eeSBenjamin Herrenschmidt if (__ioremap_at(phys_page, area->addr, size_page, 5123d5134eeSBenjamin Herrenschmidt _PAGE_NO_CACHE | _PAGE_GUARDED) == NULL) 5133d5134eeSBenjamin Herrenschmidt return -ENOMEM; 5143d5134eeSBenjamin Herrenschmidt 5153d5134eeSBenjamin Herrenschmidt /* Fixup hose IO resource */ 5163d5134eeSBenjamin Herrenschmidt io_virt_offset = (unsigned long)hose->io_base_virt - _IO_BASE; 5173d5134eeSBenjamin Herrenschmidt hose->io_resource.start += io_virt_offset; 5183d5134eeSBenjamin Herrenschmidt hose->io_resource.end += io_virt_offset; 5193d5134eeSBenjamin Herrenschmidt 5203d5134eeSBenjamin Herrenschmidt DBG(" hose->io_resource=0x%016lx...0x%016lx\n", 5213d5134eeSBenjamin Herrenschmidt hose->io_resource.start, hose->io_resource.end); 5227568cb4eSPaul Mackerras 5237568cb4eSPaul Mackerras return 0; 5247568cb4eSPaul Mackerras } 5253d5134eeSBenjamin Herrenschmidt EXPORT_SYMBOL_GPL(pcibios_map_io_space); 5267568cb4eSPaul Mackerras 527bf5e2ba2SBenjamin Herrenschmidt void __devinit pcibios_do_bus_setup(struct pci_bus *bus) 5287568cb4eSPaul Mackerras { 5297568cb4eSPaul Mackerras struct pci_dev *dev; 5307568cb4eSPaul Mackerras 53112d04eefSBenjamin Herrenschmidt if (ppc_md.pci_dma_bus_setup) 53212d04eefSBenjamin Herrenschmidt ppc_md.pci_dma_bus_setup(bus); 5337568cb4eSPaul Mackerras 5347568cb4eSPaul Mackerras list_for_each_entry(dev, &bus->devices, bus_list) 53512d04eefSBenjamin Herrenschmidt pcibios_setup_new_device(dev); 536f90bb153SBenjamin Herrenschmidt } 5377568cb4eSPaul Mackerras 538f2c4583aSBenjamin Herrenschmidt unsigned long pci_address_to_pio(phys_addr_t address) 539d4e4b352SStephen Rothwell { 540d4e4b352SStephen Rothwell struct pci_controller *hose, *tmp; 541d4e4b352SStephen Rothwell 542d4e4b352SStephen Rothwell list_for_each_entry_safe(hose, tmp, &hose_list, list_node) { 543d4e4b352SStephen Rothwell if (address >= hose->io_base_phys && 544f2c4583aSBenjamin Herrenschmidt address < (hose->io_base_phys + hose->pci_io_size)) { 545f2c4583aSBenjamin Herrenschmidt unsigned long base = 5463d5134eeSBenjamin Herrenschmidt (unsigned long)hose->io_base_virt - _IO_BASE; 547f2c4583aSBenjamin Herrenschmidt return base + (address - hose->io_base_phys); 548f2c4583aSBenjamin Herrenschmidt } 549d4e4b352SStephen Rothwell } 550d4e4b352SStephen Rothwell return (unsigned int)-1; 551d4e4b352SStephen Rothwell } 552d4e4b352SStephen Rothwell EXPORT_SYMBOL_GPL(pci_address_to_pio); 553d4e4b352SStephen Rothwell 5547568cb4eSPaul Mackerras 5557568cb4eSPaul Mackerras #define IOBASE_BRIDGE_NUMBER 0 5567568cb4eSPaul Mackerras #define IOBASE_MEMORY 1 5577568cb4eSPaul Mackerras #define IOBASE_IO 2 5587568cb4eSPaul Mackerras #define IOBASE_ISA_IO 3 5597568cb4eSPaul Mackerras #define IOBASE_ISA_MEM 4 5607568cb4eSPaul Mackerras 5617568cb4eSPaul Mackerras long sys_pciconfig_iobase(long which, unsigned long in_bus, 5627568cb4eSPaul Mackerras unsigned long in_devfn) 5637568cb4eSPaul Mackerras { 5647568cb4eSPaul Mackerras struct pci_controller* hose; 5657568cb4eSPaul Mackerras struct list_head *ln; 5667568cb4eSPaul Mackerras struct pci_bus *bus = NULL; 5677568cb4eSPaul Mackerras struct device_node *hose_node; 5687568cb4eSPaul Mackerras 5697568cb4eSPaul Mackerras /* Argh ! Please forgive me for that hack, but that's the 5707568cb4eSPaul Mackerras * simplest way to get existing XFree to not lockup on some 5717568cb4eSPaul Mackerras * G5 machines... So when something asks for bus 0 io base 5727568cb4eSPaul Mackerras * (bus 0 is HT root), we return the AGP one instead. 5737568cb4eSPaul Mackerras */ 5747568cb4eSPaul Mackerras if (machine_is_compatible("MacRISC4")) 5757568cb4eSPaul Mackerras if (in_bus == 0) 5767568cb4eSPaul Mackerras in_bus = 0xf0; 5777568cb4eSPaul Mackerras 5787568cb4eSPaul Mackerras /* That syscall isn't quite compatible with PCI domains, but it's 5797568cb4eSPaul Mackerras * used on pre-domains setup. We return the first match 5807568cb4eSPaul Mackerras */ 5817568cb4eSPaul Mackerras 5827568cb4eSPaul Mackerras for (ln = pci_root_buses.next; ln != &pci_root_buses; ln = ln->next) { 5837568cb4eSPaul Mackerras bus = pci_bus_b(ln); 584545da94fSBenjamin Herrenschmidt if (in_bus >= bus->number && in_bus <= bus->subordinate) 5857568cb4eSPaul Mackerras break; 5867568cb4eSPaul Mackerras bus = NULL; 5877568cb4eSPaul Mackerras } 5887568cb4eSPaul Mackerras if (bus == NULL || bus->sysdata == NULL) 5897568cb4eSPaul Mackerras return -ENODEV; 5907568cb4eSPaul Mackerras 5917568cb4eSPaul Mackerras hose_node = (struct device_node *)bus->sysdata; 5927568cb4eSPaul Mackerras hose = PCI_DN(hose_node)->phb; 5937568cb4eSPaul Mackerras 5947568cb4eSPaul Mackerras switch (which) { 5957568cb4eSPaul Mackerras case IOBASE_BRIDGE_NUMBER: 5967568cb4eSPaul Mackerras return (long)hose->first_busno; 5977568cb4eSPaul Mackerras case IOBASE_MEMORY: 5987568cb4eSPaul Mackerras return (long)hose->pci_mem_offset; 5997568cb4eSPaul Mackerras case IOBASE_IO: 6007568cb4eSPaul Mackerras return (long)hose->io_base_phys; 6017568cb4eSPaul Mackerras case IOBASE_ISA_IO: 6027568cb4eSPaul Mackerras return (long)isa_io_base; 6037568cb4eSPaul Mackerras case IOBASE_ISA_MEM: 6047568cb4eSPaul Mackerras return -EINVAL; 6057568cb4eSPaul Mackerras } 6067568cb4eSPaul Mackerras 6077568cb4eSPaul Mackerras return -EOPNOTSUPP; 6087568cb4eSPaul Mackerras } 609357518faSAnton Blanchard 610357518faSAnton Blanchard #ifdef CONFIG_NUMA 611357518faSAnton Blanchard int pcibus_to_node(struct pci_bus *bus) 612357518faSAnton Blanchard { 613357518faSAnton Blanchard struct pci_controller *phb = pci_bus_to_host(bus); 614357518faSAnton Blanchard return phb->node; 615357518faSAnton Blanchard } 616357518faSAnton Blanchard EXPORT_SYMBOL(pcibus_to_node); 617357518faSAnton Blanchard #endif 618