| 1 | /* |
| 2 | * Port for PPC64 David Engebretsen, IBM Corp. |
| 3 | * Contains common pci routines for ppc64 platform, pSeries and iSeries brands. |
| 4 | * |
| 5 | * Copyright (C) 2003 Anton Blanchard <anton@au.ibm.com>, IBM |
| 6 | * Rework, based on alpha PCI code. |
| 7 | * |
| 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. |
| 12 | */ |
| 13 | |
| 14 | #undef DEBUG |
| 15 | |
| 16 | #include <linux/kernel.h> |
| 17 | #include <linux/pci.h> |
| 18 | #include <linux/string.h> |
| 19 | #include <linux/init.h> |
| 20 | #include <linux/bootmem.h> |
| 21 | #include <linux/mm.h> |
| 22 | #include <linux/list.h> |
| 23 | #include <linux/syscalls.h> |
| 24 | #include <linux/irq.h> |
| 25 | #include <linux/vmalloc.h> |
| 26 | |
| 27 | #include <asm/processor.h> |
| 28 | #include <asm/io.h> |
| 29 | #include <asm/prom.h> |
| 30 | #include <asm/pci-bridge.h> |
| 31 | #include <asm/byteorder.h> |
| 32 | #include <asm/machdep.h> |
| 33 | #include <asm/ppc-pci.h> |
| 34 | |
| 35 | unsigned long pci_probe_only = 1; |
| 36 | |
| 37 | /* pci_io_base -- the base address from which io bars are offsets. |
| 38 | * This is the lowest I/O base address (so bar values are always positive), |
| 39 | * and it *must* be the start of ISA space if an ISA bus exists because |
| 40 | * ISA drivers use hard coded offsets. If no ISA bus exists nothing |
| 41 | * is mapped on the first 64K of IO space |
| 42 | */ |
| 43 | unsigned long pci_io_base = ISA_IO_BASE; |
| 44 | EXPORT_SYMBOL(pci_io_base); |
| 45 | |
| 46 | static void fixup_broken_pcnet32(struct pci_dev* dev) |
| 47 | { |
| 48 | if ((dev->class>>8 == PCI_CLASS_NETWORK_ETHERNET)) { |
| 49 | dev->vendor = PCI_VENDOR_ID_AMD; |
| 50 | pci_write_config_word(dev, PCI_VENDOR_ID, PCI_VENDOR_ID_AMD); |
| 51 | } |
| 52 | } |
| 53 | DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_TRIDENT, PCI_ANY_ID, fixup_broken_pcnet32); |
| 54 | |
| 55 | |
| 56 | static u32 get_int_prop(struct device_node *np, const char *name, u32 def) |
| 57 | { |
| 58 | const u32 *prop; |
| 59 | int len; |
| 60 | |
| 61 | prop = of_get_property(np, name, &len); |
| 62 | if (prop && len >= 4) |
| 63 | return *prop; |
| 64 | return def; |
| 65 | } |
| 66 | |
| 67 | static unsigned int pci_parse_of_flags(u32 addr0) |
| 68 | { |
| 69 | unsigned int flags = 0; |
| 70 | |
| 71 | if (addr0 & 0x02000000) { |
| 72 | flags = IORESOURCE_MEM | PCI_BASE_ADDRESS_SPACE_MEMORY; |
| 73 | flags |= (addr0 >> 22) & PCI_BASE_ADDRESS_MEM_TYPE_64; |
| 74 | flags |= (addr0 >> 28) & PCI_BASE_ADDRESS_MEM_TYPE_1M; |
| 75 | if (addr0 & 0x40000000) |
| 76 | flags |= IORESOURCE_PREFETCH |
| 77 | | PCI_BASE_ADDRESS_MEM_PREFETCH; |
| 78 | } else if (addr0 & 0x01000000) |
| 79 | flags = IORESOURCE_IO | PCI_BASE_ADDRESS_SPACE_IO; |
| 80 | return flags; |
| 81 | } |
| 82 | |
| 83 | |
| 84 | static void pci_parse_of_addrs(struct device_node *node, struct pci_dev *dev) |
| 85 | { |
| 86 | u64 base, size; |
| 87 | unsigned int flags; |
| 88 | struct resource *res; |
| 89 | const u32 *addrs; |
| 90 | u32 i; |
| 91 | int proplen; |
| 92 | |
| 93 | addrs = of_get_property(node, "assigned-addresses", &proplen); |
| 94 | if (!addrs) |
| 95 | return; |
| 96 | pr_debug(" parse addresses (%d bytes) @ %p\n", proplen, addrs); |
| 97 | for (; proplen >= 20; proplen -= 20, addrs += 5) { |
| 98 | flags = pci_parse_of_flags(addrs[0]); |
| 99 | if (!flags) |
| 100 | continue; |
| 101 | base = of_read_number(&addrs[1], 2); |
| 102 | size = of_read_number(&addrs[3], 2); |
| 103 | if (!size) |
| 104 | continue; |
| 105 | i = addrs[0] & 0xff; |
| 106 | pr_debug(" base: %llx, size: %llx, i: %x\n", |
| 107 | (unsigned long long)base, |
| 108 | (unsigned long long)size, i); |
| 109 | |
| 110 | if (PCI_BASE_ADDRESS_0 <= i && i <= PCI_BASE_ADDRESS_5) { |
| 111 | res = &dev->resource[(i - PCI_BASE_ADDRESS_0) >> 2]; |
| 112 | } else if (i == dev->rom_base_reg) { |
| 113 | res = &dev->resource[PCI_ROM_RESOURCE]; |
| 114 | flags |= IORESOURCE_READONLY | IORESOURCE_CACHEABLE; |
| 115 | } else { |
| 116 | printk(KERN_ERR "PCI: bad cfg reg num 0x%x\n", i); |
| 117 | continue; |
| 118 | } |
| 119 | res->start = base; |
| 120 | res->end = base + size - 1; |
| 121 | res->flags = flags; |
| 122 | res->name = pci_name(dev); |
| 123 | } |
| 124 | } |
| 125 | |
| 126 | struct pci_dev *of_create_pci_dev(struct device_node *node, |
| 127 | struct pci_bus *bus, int devfn) |
| 128 | { |
| 129 | struct pci_dev *dev; |
| 130 | const char *type; |
| 131 | |
| 132 | dev = alloc_pci_dev(); |
| 133 | if (!dev) |
| 134 | return NULL; |
| 135 | type = of_get_property(node, "device_type", NULL); |
| 136 | if (type == NULL) |
| 137 | type = ""; |
| 138 | |
| 139 | pr_debug(" create device, devfn: %x, type: %s\n", devfn, type); |
| 140 | |
| 141 | dev->bus = bus; |
| 142 | dev->sysdata = node; |
| 143 | dev->dev.parent = bus->bridge; |
| 144 | dev->dev.bus = &pci_bus_type; |
| 145 | dev->devfn = devfn; |
| 146 | dev->multifunction = 0; /* maybe a lie? */ |
| 147 | |
| 148 | dev->vendor = get_int_prop(node, "vendor-id", 0xffff); |
| 149 | dev->device = get_int_prop(node, "device-id", 0xffff); |
| 150 | dev->subsystem_vendor = get_int_prop(node, "subsystem-vendor-id", 0); |
| 151 | dev->subsystem_device = get_int_prop(node, "subsystem-id", 0); |
| 152 | |
| 153 | dev->cfg_size = pci_cfg_space_size(dev); |
| 154 | |
| 155 | dev_set_name(&dev->dev, "%04x:%02x:%02x.%d", pci_domain_nr(bus), |
| 156 | dev->bus->number, PCI_SLOT(devfn), PCI_FUNC(devfn)); |
| 157 | dev->class = get_int_prop(node, "class-code", 0); |
| 158 | dev->revision = get_int_prop(node, "revision-id", 0); |
| 159 | |
| 160 | pr_debug(" class: 0x%x\n", dev->class); |
| 161 | pr_debug(" revision: 0x%x\n", dev->revision); |
| 162 | |
| 163 | dev->current_state = 4; /* unknown power state */ |
| 164 | dev->error_state = pci_channel_io_normal; |
| 165 | dev->dma_mask = 0xffffffff; |
| 166 | |
| 167 | if (!strcmp(type, "pci") || !strcmp(type, "pciex")) { |
| 168 | /* a PCI-PCI bridge */ |
| 169 | dev->hdr_type = PCI_HEADER_TYPE_BRIDGE; |
| 170 | dev->rom_base_reg = PCI_ROM_ADDRESS1; |
| 171 | } else if (!strcmp(type, "cardbus")) { |
| 172 | dev->hdr_type = PCI_HEADER_TYPE_CARDBUS; |
| 173 | } else { |
| 174 | dev->hdr_type = PCI_HEADER_TYPE_NORMAL; |
| 175 | dev->rom_base_reg = PCI_ROM_ADDRESS; |
| 176 | /* Maybe do a default OF mapping here */ |
| 177 | dev->irq = NO_IRQ; |
| 178 | } |
| 179 | |
| 180 | pci_parse_of_addrs(node, dev); |
| 181 | |
| 182 | pr_debug(" adding to system ...\n"); |
| 183 | |
| 184 | pci_device_add(dev, bus); |
| 185 | |
| 186 | return dev; |
| 187 | } |
| 188 | EXPORT_SYMBOL(of_create_pci_dev); |
| 189 | |
| 190 | static void __devinit __of_scan_bus(struct device_node *node, |
| 191 | struct pci_bus *bus, int rescan_existing) |
| 192 | { |
| 193 | struct device_node *child; |
| 194 | const u32 *reg; |
| 195 | int reglen, devfn; |
| 196 | struct pci_dev *dev; |
| 197 | |
| 198 | pr_debug("of_scan_bus(%s) bus no %d... \n", |
| 199 | node->full_name, bus->number); |
| 200 | |
| 201 | /* Scan direct children */ |
| 202 | for_each_child_of_node(node, child) { |
| 203 | pr_debug(" * %s\n", child->full_name); |
| 204 | reg = of_get_property(child, "reg", ®len); |
| 205 | if (reg == NULL || reglen < 20) |
| 206 | continue; |
| 207 | devfn = (reg[0] >> 8) & 0xff; |
| 208 | |
| 209 | /* create a new pci_dev for this device */ |
| 210 | dev = of_create_pci_dev(child, bus, devfn); |
| 211 | if (!dev) |
| 212 | continue; |
| 213 | pr_debug(" dev header type: %x\n", dev->hdr_type); |
| 214 | } |
| 215 | |
| 216 | /* Apply all fixups necessary. We don't fixup the bus "self" |
| 217 | * for an existing bridge that is being rescanned |
| 218 | */ |
| 219 | if (!rescan_existing) |
| 220 | pcibios_setup_bus_self(bus); |
| 221 | pcibios_setup_bus_devices(bus); |
| 222 | |
| 223 | /* Now scan child busses */ |
| 224 | list_for_each_entry(dev, &bus->devices, bus_list) { |
| 225 | if (dev->hdr_type == PCI_HEADER_TYPE_BRIDGE || |
| 226 | dev->hdr_type == PCI_HEADER_TYPE_CARDBUS) { |
| 227 | struct device_node *child = pci_device_to_OF_node(dev); |
| 228 | if (dev) |
| 229 | of_scan_pci_bridge(child, dev); |
| 230 | } |
| 231 | } |
| 232 | } |
| 233 | |
| 234 | void __devinit of_scan_bus(struct device_node *node, |
| 235 | struct pci_bus *bus) |
| 236 | { |
| 237 | __of_scan_bus(node, bus, 0); |
| 238 | } |
| 239 | EXPORT_SYMBOL_GPL(of_scan_bus); |
| 240 | |
| 241 | void __devinit of_rescan_bus(struct device_node *node, |
| 242 | struct pci_bus *bus) |
| 243 | { |
| 244 | __of_scan_bus(node, bus, 1); |
| 245 | } |
| 246 | EXPORT_SYMBOL_GPL(of_rescan_bus); |
| 247 | |
| 248 | void __devinit of_scan_pci_bridge(struct device_node *node, |
| 249 | struct pci_dev *dev) |
| 250 | { |
| 251 | struct pci_bus *bus; |
| 252 | const u32 *busrange, *ranges; |
| 253 | int len, i, mode; |
| 254 | struct resource *res; |
| 255 | unsigned int flags; |
| 256 | u64 size; |
| 257 | |
| 258 | pr_debug("of_scan_pci_bridge(%s)\n", node->full_name); |
| 259 | |
| 260 | /* parse bus-range property */ |
| 261 | busrange = of_get_property(node, "bus-range", &len); |
| 262 | if (busrange == NULL || len != 8) { |
| 263 | printk(KERN_DEBUG "Can't get bus-range for PCI-PCI bridge %s\n", |
| 264 | node->full_name); |
| 265 | return; |
| 266 | } |
| 267 | ranges = of_get_property(node, "ranges", &len); |
| 268 | if (ranges == NULL) { |
| 269 | printk(KERN_DEBUG "Can't get ranges for PCI-PCI bridge %s\n", |
| 270 | node->full_name); |
| 271 | return; |
| 272 | } |
| 273 | |
| 274 | bus = pci_add_new_bus(dev->bus, dev, busrange[0]); |
| 275 | if (!bus) { |
| 276 | printk(KERN_ERR "Failed to create pci bus for %s\n", |
| 277 | node->full_name); |
| 278 | return; |
| 279 | } |
| 280 | |
| 281 | bus->primary = dev->bus->number; |
| 282 | bus->subordinate = busrange[1]; |
| 283 | bus->bridge_ctl = 0; |
| 284 | bus->sysdata = node; |
| 285 | |
| 286 | /* parse ranges property */ |
| 287 | /* PCI #address-cells == 3 and #size-cells == 2 always */ |
| 288 | res = &dev->resource[PCI_BRIDGE_RESOURCES]; |
| 289 | for (i = 0; i < PCI_NUM_RESOURCES - PCI_BRIDGE_RESOURCES; ++i) { |
| 290 | res->flags = 0; |
| 291 | bus->resource[i] = res; |
| 292 | ++res; |
| 293 | } |
| 294 | i = 1; |
| 295 | for (; len >= 32; len -= 32, ranges += 8) { |
| 296 | flags = pci_parse_of_flags(ranges[0]); |
| 297 | size = of_read_number(&ranges[6], 2); |
| 298 | if (flags == 0 || size == 0) |
| 299 | continue; |
| 300 | if (flags & IORESOURCE_IO) { |
| 301 | res = bus->resource[0]; |
| 302 | if (res->flags) { |
| 303 | printk(KERN_ERR "PCI: ignoring extra I/O range" |
| 304 | " for bridge %s\n", node->full_name); |
| 305 | continue; |
| 306 | } |
| 307 | } else { |
| 308 | if (i >= PCI_NUM_RESOURCES - PCI_BRIDGE_RESOURCES) { |
| 309 | printk(KERN_ERR "PCI: too many memory ranges" |
| 310 | " for bridge %s\n", node->full_name); |
| 311 | continue; |
| 312 | } |
| 313 | res = bus->resource[i]; |
| 314 | ++i; |
| 315 | } |
| 316 | res->start = of_read_number(&ranges[1], 2); |
| 317 | res->end = res->start + size - 1; |
| 318 | res->flags = flags; |
| 319 | } |
| 320 | sprintf(bus->name, "PCI Bus %04x:%02x", pci_domain_nr(bus), |
| 321 | bus->number); |
| 322 | pr_debug(" bus name: %s\n", bus->name); |
| 323 | |
| 324 | mode = PCI_PROBE_NORMAL; |
| 325 | if (ppc_md.pci_probe_mode) |
| 326 | mode = ppc_md.pci_probe_mode(bus); |
| 327 | pr_debug(" probe mode: %d\n", mode); |
| 328 | |
| 329 | if (mode == PCI_PROBE_DEVTREE) |
| 330 | of_scan_bus(node, bus); |
| 331 | else if (mode == PCI_PROBE_NORMAL) |
| 332 | pci_scan_child_bus(bus); |
| 333 | } |
| 334 | EXPORT_SYMBOL(of_scan_pci_bridge); |
| 335 | |
| 336 | void __devinit scan_phb(struct pci_controller *hose) |
| 337 | { |
| 338 | struct pci_bus *bus; |
| 339 | struct device_node *node = hose->dn; |
| 340 | int mode; |
| 341 | |
| 342 | pr_debug("PCI: Scanning PHB %s\n", |
| 343 | node ? node->full_name : "<NO NAME>"); |
| 344 | |
| 345 | /* Create an empty bus for the toplevel */ |
| 346 | bus = pci_create_bus(hose->parent, hose->first_busno, hose->ops, node); |
| 347 | if (bus == NULL) { |
| 348 | printk(KERN_ERR "Failed to create bus for PCI domain %04x\n", |
| 349 | hose->global_number); |
| 350 | return; |
| 351 | } |
| 352 | bus->secondary = hose->first_busno; |
| 353 | hose->bus = bus; |
| 354 | |
| 355 | /* Get some IO space for the new PHB */ |
| 356 | pcibios_map_io_space(bus); |
| 357 | |
| 358 | /* Wire up PHB bus resources */ |
| 359 | pcibios_setup_phb_resources(hose); |
| 360 | |
| 361 | /* Get probe mode and perform scan */ |
| 362 | mode = PCI_PROBE_NORMAL; |
| 363 | if (node && ppc_md.pci_probe_mode) |
| 364 | mode = ppc_md.pci_probe_mode(bus); |
| 365 | pr_debug(" probe mode: %d\n", mode); |
| 366 | if (mode == PCI_PROBE_DEVTREE) { |
| 367 | bus->subordinate = hose->last_busno; |
| 368 | of_scan_bus(node, bus); |
| 369 | } |
| 370 | |
| 371 | if (mode == PCI_PROBE_NORMAL) |
| 372 | hose->last_busno = bus->subordinate = pci_scan_child_bus(bus); |
| 373 | } |
| 374 | |
| 375 | static int __init pcibios_init(void) |
| 376 | { |
| 377 | struct pci_controller *hose, *tmp; |
| 378 | |
| 379 | printk(KERN_INFO "PCI: Probing PCI hardware\n"); |
| 380 | |
| 381 | /* For now, override phys_mem_access_prot. If we need it,g |
| 382 | * later, we may move that initialization to each ppc_md |
| 383 | */ |
| 384 | ppc_md.phys_mem_access_prot = pci_phys_mem_access_prot; |
| 385 | |
| 386 | if (pci_probe_only) |
| 387 | ppc_pci_flags |= PPC_PCI_PROBE_ONLY; |
| 388 | |
| 389 | /* On ppc64, we always enable PCI domains and we keep domain 0 |
| 390 | * backward compatible in /proc for video cards |
| 391 | */ |
| 392 | ppc_pci_flags |= PPC_PCI_ENABLE_PROC_DOMAINS | PPC_PCI_COMPAT_DOMAIN_0; |
| 393 | |
| 394 | /* Scan all of the recorded PCI controllers. */ |
| 395 | list_for_each_entry_safe(hose, tmp, &hose_list, list_node) { |
| 396 | scan_phb(hose); |
| 397 | pci_bus_add_devices(hose->bus); |
| 398 | } |
| 399 | |
| 400 | /* Call common code to handle resource allocation */ |
| 401 | pcibios_resource_survey(); |
| 402 | |
| 403 | printk(KERN_DEBUG "PCI: Probing PCI hardware done\n"); |
| 404 | |
| 405 | return 0; |
| 406 | } |
| 407 | |
| 408 | subsys_initcall(pcibios_init); |
| 409 | |
| 410 | #ifdef CONFIG_HOTPLUG |
| 411 | |
| 412 | int pcibios_unmap_io_space(struct pci_bus *bus) |
| 413 | { |
| 414 | struct pci_controller *hose; |
| 415 | |
| 416 | WARN_ON(bus == NULL); |
| 417 | |
| 418 | /* If this is not a PHB, we only flush the hash table over |
| 419 | * the area mapped by this bridge. We don't play with the PTE |
| 420 | * mappings since we might have to deal with sub-page alignemnts |
| 421 | * so flushing the hash table is the only sane way to make sure |
| 422 | * that no hash entries are covering that removed bridge area |
| 423 | * while still allowing other busses overlapping those pages |
| 424 | */ |
| 425 | if (bus->self) { |
| 426 | struct resource *res = bus->resource[0]; |
| 427 | |
| 428 | pr_debug("IO unmapping for PCI-PCI bridge %s\n", |
| 429 | pci_name(bus->self)); |
| 430 | |
| 431 | __flush_hash_table_range(&init_mm, res->start + _IO_BASE, |
| 432 | res->end + _IO_BASE + 1); |
| 433 | return 0; |
| 434 | } |
| 435 | |
| 436 | /* Get the host bridge */ |
| 437 | hose = pci_bus_to_host(bus); |
| 438 | |
| 439 | /* Check if we have IOs allocated */ |
| 440 | if (hose->io_base_alloc == 0) |
| 441 | return 0; |
| 442 | |
| 443 | pr_debug("IO unmapping for PHB %s\n", hose->dn->full_name); |
| 444 | pr_debug(" alloc=0x%p\n", hose->io_base_alloc); |
| 445 | |
| 446 | /* This is a PHB, we fully unmap the IO area */ |
| 447 | vunmap(hose->io_base_alloc); |
| 448 | |
| 449 | return 0; |
| 450 | } |
| 451 | EXPORT_SYMBOL_GPL(pcibios_unmap_io_space); |
| 452 | |
| 453 | #endif /* CONFIG_HOTPLUG */ |
| 454 | |
| 455 | int __devinit pcibios_map_io_space(struct pci_bus *bus) |
| 456 | { |
| 457 | struct vm_struct *area; |
| 458 | unsigned long phys_page; |
| 459 | unsigned long size_page; |
| 460 | unsigned long io_virt_offset; |
| 461 | struct pci_controller *hose; |
| 462 | |
| 463 | WARN_ON(bus == NULL); |
| 464 | |
| 465 | /* If this not a PHB, nothing to do, page tables still exist and |
| 466 | * thus HPTEs will be faulted in when needed |
| 467 | */ |
| 468 | if (bus->self) { |
| 469 | pr_debug("IO mapping for PCI-PCI bridge %s\n", |
| 470 | pci_name(bus->self)); |
| 471 | pr_debug(" virt=0x%016llx...0x%016llx\n", |
| 472 | bus->resource[0]->start + _IO_BASE, |
| 473 | bus->resource[0]->end + _IO_BASE); |
| 474 | return 0; |
| 475 | } |
| 476 | |
| 477 | /* Get the host bridge */ |
| 478 | hose = pci_bus_to_host(bus); |
| 479 | phys_page = _ALIGN_DOWN(hose->io_base_phys, PAGE_SIZE); |
| 480 | size_page = _ALIGN_UP(hose->pci_io_size, PAGE_SIZE); |
| 481 | |
| 482 | /* Make sure IO area address is clear */ |
| 483 | hose->io_base_alloc = NULL; |
| 484 | |
| 485 | /* If there's no IO to map on that bus, get away too */ |
| 486 | if (hose->pci_io_size == 0 || hose->io_base_phys == 0) |
| 487 | return 0; |
| 488 | |
| 489 | /* Let's allocate some IO space for that guy. We don't pass |
| 490 | * VM_IOREMAP because we don't care about alignment tricks that |
| 491 | * the core does in that case. Maybe we should due to stupid card |
| 492 | * with incomplete address decoding but I'd rather not deal with |
| 493 | * those outside of the reserved 64K legacy region. |
| 494 | */ |
| 495 | area = __get_vm_area(size_page, 0, PHB_IO_BASE, PHB_IO_END); |
| 496 | if (area == NULL) |
| 497 | return -ENOMEM; |
| 498 | hose->io_base_alloc = area->addr; |
| 499 | hose->io_base_virt = (void __iomem *)(area->addr + |
| 500 | hose->io_base_phys - phys_page); |
| 501 | |
| 502 | pr_debug("IO mapping for PHB %s\n", hose->dn->full_name); |
| 503 | pr_debug(" phys=0x%016llx, virt=0x%p (alloc=0x%p)\n", |
| 504 | hose->io_base_phys, hose->io_base_virt, hose->io_base_alloc); |
| 505 | pr_debug(" size=0x%016lx (alloc=0x%016lx)\n", |
| 506 | hose->pci_io_size, size_page); |
| 507 | |
| 508 | /* Establish the mapping */ |
| 509 | if (__ioremap_at(phys_page, area->addr, size_page, |
| 510 | _PAGE_NO_CACHE | _PAGE_GUARDED) == NULL) |
| 511 | return -ENOMEM; |
| 512 | |
| 513 | /* Fixup hose IO resource */ |
| 514 | io_virt_offset = (unsigned long)hose->io_base_virt - _IO_BASE; |
| 515 | hose->io_resource.start += io_virt_offset; |
| 516 | hose->io_resource.end += io_virt_offset; |
| 517 | |
| 518 | pr_debug(" hose->io_resource=0x%016llx...0x%016llx\n", |
| 519 | hose->io_resource.start, hose->io_resource.end); |
| 520 | |
| 521 | return 0; |
| 522 | } |
| 523 | EXPORT_SYMBOL_GPL(pcibios_map_io_space); |
| 524 | |
| 525 | #define IOBASE_BRIDGE_NUMBER 0 |
| 526 | #define IOBASE_MEMORY 1 |
| 527 | #define IOBASE_IO 2 |
| 528 | #define IOBASE_ISA_IO 3 |
| 529 | #define IOBASE_ISA_MEM 4 |
| 530 | |
| 531 | long sys_pciconfig_iobase(long which, unsigned long in_bus, |
| 532 | unsigned long in_devfn) |
| 533 | { |
| 534 | struct pci_controller* hose; |
| 535 | struct list_head *ln; |
| 536 | struct pci_bus *bus = NULL; |
| 537 | struct device_node *hose_node; |
| 538 | |
| 539 | /* Argh ! Please forgive me for that hack, but that's the |
| 540 | * simplest way to get existing XFree to not lockup on some |
| 541 | * G5 machines... So when something asks for bus 0 io base |
| 542 | * (bus 0 is HT root), we return the AGP one instead. |
| 543 | */ |
| 544 | if (in_bus == 0 && machine_is_compatible("MacRISC4")) { |
| 545 | struct device_node *agp; |
| 546 | |
| 547 | agp = of_find_compatible_node(NULL, NULL, "u3-agp"); |
| 548 | if (agp) |
| 549 | in_bus = 0xf0; |
| 550 | of_node_put(agp); |
| 551 | } |
| 552 | |
| 553 | /* That syscall isn't quite compatible with PCI domains, but it's |
| 554 | * used on pre-domains setup. We return the first match |
| 555 | */ |
| 556 | |
| 557 | for (ln = pci_root_buses.next; ln != &pci_root_buses; ln = ln->next) { |
| 558 | bus = pci_bus_b(ln); |
| 559 | if (in_bus >= bus->number && in_bus <= bus->subordinate) |
| 560 | break; |
| 561 | bus = NULL; |
| 562 | } |
| 563 | if (bus == NULL || bus->sysdata == NULL) |
| 564 | return -ENODEV; |
| 565 | |
| 566 | hose_node = (struct device_node *)bus->sysdata; |
| 567 | hose = PCI_DN(hose_node)->phb; |
| 568 | |
| 569 | switch (which) { |
| 570 | case IOBASE_BRIDGE_NUMBER: |
| 571 | return (long)hose->first_busno; |
| 572 | case IOBASE_MEMORY: |
| 573 | return (long)hose->pci_mem_offset; |
| 574 | case IOBASE_IO: |
| 575 | return (long)hose->io_base_phys; |
| 576 | case IOBASE_ISA_IO: |
| 577 | return (long)isa_io_base; |
| 578 | case IOBASE_ISA_MEM: |
| 579 | return -EINVAL; |
| 580 | } |
| 581 | |
| 582 | return -EOPNOTSUPP; |
| 583 | } |
| 584 | |
| 585 | #ifdef CONFIG_NUMA |
| 586 | int pcibus_to_node(struct pci_bus *bus) |
| 587 | { |
| 588 | struct pci_controller *phb = pci_bus_to_host(bus); |
| 589 | return phb->node; |
| 590 | } |
| 591 | EXPORT_SYMBOL(pcibus_to_node); |
| 592 | #endif |