arch/x86/pci/common.c

   1 /*
   2  *      Low-Level PCI Support for PC
   3  *
   4  *      (c) 1999--2000 Martin Mares <mj@ucw.cz>
   5  */
   6
   7 #include <linux/sched.h>
   8 #include <linux/pci.h>
   9 #include <linux/pci-acpi.h>
  10 #include <linux/ioport.h>
  11 #include <linux/init.h>
  12 #include <linux/dmi.h>
  13 #include <linux/slab.h>
  14
  15 #include <asm/acpi.h>
  16 #include <asm/segment.h>
  17 #include <asm/io.h>
  18 #include <asm/smp.h>
  19 #include <asm/pci_x86.h>
  20 #include <asm/setup.h>
  21
  22 unsigned int pci_probe = PCI_PROBE_BIOS | PCI_PROBE_CONF1 | PCI_PROBE_CONF2 |
  23                                 PCI_PROBE_MMCONF;
  24
  25 unsigned int pci_early_dump_regs;
  26 static int pci_bf_sort;
  27 static int smbios_type_b1_flag;
  28 int pci_routeirq;
  29 int noioapicquirk;
  30 #ifdef CONFIG_X86_REROUTE_FOR_BROKEN_BOOT_IRQS
  31 int noioapicreroute = 0;
  32 #else
  33 int noioapicreroute = 1;
  34 #endif
  35 int pcibios_last_bus = -1;
  36 unsigned long pirq_table_addr;
  37 const struct pci_raw_ops *__read_mostly raw_pci_ops;
  38 const struct pci_raw_ops *__read_mostly raw_pci_ext_ops;
  39
  40 int raw_pci_read(unsigned int domain, unsigned int bus, unsigned int devfn,
  41                                                 int reg, int len, u32 *val)
  42 {
  43         if (domain == 0 && reg < 256 && raw_pci_ops)
  44                 return raw_pci_ops->read(domain, bus, devfn, reg, len, val);
  45         if (raw_pci_ext_ops)
  46                 return raw_pci_ext_ops->read(domain, bus, devfn, reg, len, val);
  47         return -EINVAL;
  48 }
  49
  50 int raw_pci_write(unsigned int domain, unsigned int bus, unsigned int devfn,
  51                                                 int reg, int len, u32 val)
  52 {
  53         if (domain == 0 && reg < 256 && raw_pci_ops)
  54                 return raw_pci_ops->write(domain, bus, devfn, reg, len, val);
  55         if (raw_pci_ext_ops)
  56                 return raw_pci_ext_ops->write(domain, bus, devfn, reg, len, val);
  57         return -EINVAL;
  58 }
  59
  60 static int pci_read(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 *value)
  61 {
  62         return raw_pci_read(pci_domain_nr(bus), bus->number,
  63                                  devfn, where, size, value);
  64 }
  65
  66 static int pci_write(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 value)
  67 {
  68         return raw_pci_write(pci_domain_nr(bus), bus->number,
  69                                   devfn, where, size, value);
  70 }
  71
  72 struct pci_ops pci_root_ops = {
  73         .read = pci_read,
  74         .write = pci_write,
  75 };
  76
  77 /*
  78  * This interrupt-safe spinlock protects all accesses to PCI
  79  * configuration space.
  80  */
  81 DEFINE_RAW_SPINLOCK(pci_config_lock);
  82
  83 static int __init can_skip_ioresource_align(const struct dmi_system_id *d)
  84 {
  85         pci_probe |= PCI_CAN_SKIP_ISA_ALIGN;
  86         printk(KERN_INFO "PCI: %s detected, can skip ISA alignment\n", d->ident);
  87         return 0;
  88 }
  89
  90 static const struct dmi_system_id can_skip_pciprobe_dmi_table[] __initconst = {
  91 /*
  92  * Systems where PCI IO resource ISA alignment can be skipped
  93  * when the ISA enable bit in the bridge control is not set
  94  */
  95         {
  96                 .callback = can_skip_ioresource_align,
  97                 .ident = "IBM System x3800",
  98                 .matches = {
  99                         DMI_MATCH(DMI_SYS_VENDOR, "IBM"),
 100                         DMI_MATCH(DMI_PRODUCT_NAME, "x3800"),
 101                 },
 102         },
 103         {
 104                 .callback = can_skip_ioresource_align,
 105                 .ident = "IBM System x3850",
 106                 .matches = {
 107                         DMI_MATCH(DMI_SYS_VENDOR, "IBM"),
 108                         DMI_MATCH(DMI_PRODUCT_NAME, "x3850"),
 109                 },
 110         },
 111         {
 112                 .callback = can_skip_ioresource_align,
 113                 .ident = "IBM System x3950",
 114                 .matches = {
 115                         DMI_MATCH(DMI_SYS_VENDOR, "IBM"),
 116                         DMI_MATCH(DMI_PRODUCT_NAME, "x3950"),
 117                 },
 118         },
 119         {}
 120 };
 121
 122 void __init dmi_check_skip_isa_align(void)
 123 {
 124         dmi_check_system(can_skip_pciprobe_dmi_table);
 125 }
 126
 127 static void pcibios_fixup_device_resources(struct pci_dev *dev)
 128 {
 129         struct resource *rom_r = &dev->resource[PCI_ROM_RESOURCE];
 130         struct resource *bar_r;
 131         int bar;
 132
 133         if (pci_probe & PCI_NOASSIGN_BARS) {
 134                 /*
 135                 * If the BIOS did not assign the BAR, zero out the
 136                 * resource so the kernel doesn't attmept to assign
 137                 * it later on in pci_assign_unassigned_resources
 138                 */
 139                 for (bar = 0; bar <= PCI_STD_RESOURCE_END; bar++) {
 140                         bar_r = &dev->resource[bar];
 141                         if (bar_r->start == 0 && bar_r->end != 0) {
 142                                 bar_r->flags = 0;
 143                                 bar_r->end = 0;
 144                         }
 145                 }
 146         }
 147
 148         if (pci_probe & PCI_NOASSIGN_ROMS) {
 149                 if (rom_r->parent)
 150                         return;
 151                 if (rom_r->start) {
 152                         /* we deal with BIOS assigned ROM later */
 153                         return;
 154                 }
 155                 rom_r->start = rom_r->end = rom_r->flags = 0;
 156         }
 157 }
 158
 159 /*
 160  *  Called after each bus is probed, but before its children
 161  *  are examined.
 162  */
 163
 164 void pcibios_fixup_bus(struct pci_bus *b)
 165 {
 166         struct pci_dev *dev;
 167
 168         pci_read_bridge_bases(b);
 169         list_for_each_entry(dev, &b->devices, bus_list)
 170                 pcibios_fixup_device_resources(dev);
 171 }
 172
 173 void pcibios_add_bus(struct pci_bus *bus)
 174 {
 175         acpi_pci_add_bus(bus);
 176 }
 177
 178 void pcibios_remove_bus(struct pci_bus *bus)
 179 {
 180         acpi_pci_remove_bus(bus);
 181 }
 182
 183 /*
 184  * Only use DMI information to set this if nothing was passed
 185  * on the kernel command line (which was parsed earlier).
 186  */
 187
 188 static int __init set_bf_sort(const struct dmi_system_id *d)
 189 {
 190         if (pci_bf_sort == pci_bf_sort_default) {
 191                 pci_bf_sort = pci_dmi_bf;
 192                 printk(KERN_INFO "PCI: %s detected, enabling pci=bfsort.\n", d->ident);
 193         }
 194         return 0;
 195 }
 196
 197 static void __init read_dmi_type_b1(const struct dmi_header *dm,
 198                                     void *private_data)
 199 {
 200         u8 *d = (u8 *)dm + 4;
 201
 202         if (dm->type != 0xB1)
 203                 return;
 204         switch (((*(u32 *)d) >> 9) & 0x03) {
 205         case 0x00:
 206                 printk(KERN_INFO "dmi type 0xB1 record - unknown flag\n");
 207                 break;
 208         case 0x01: /* set pci=bfsort */
 209                 smbios_type_b1_flag = 1;
 210                 break;
 211         case 0x02: /* do not set pci=bfsort */
 212                 smbios_type_b1_flag = 2;
 213                 break;
 214         default:
 215                 break;
 216         }
 217 }
 218
 219 static int __init find_sort_method(const struct dmi_system_id *d)
 220 {
 221         dmi_walk(read_dmi_type_b1, NULL);
 222
 223         if (smbios_type_b1_flag == 1) {
 224                 set_bf_sort(d);
 225                 return 0;
 226         }
 227         return -1;
 228 }
 229
 230 /*
 231  * Enable renumbering of PCI bus# ranges to reach all PCI busses (Cardbus)
 232  */
 233 #ifdef __i386__
 234 static int __init assign_all_busses(const struct dmi_system_id *d)
 235 {
 236         pci_probe |= PCI_ASSIGN_ALL_BUSSES;
 237         printk(KERN_INFO "%s detected: enabling PCI bus# renumbering"
 238                         " (pci=assign-busses)\n", d->ident);
 239         return 0;
 240 }
 241 #endif
 242
 243 static int __init set_scan_all(const struct dmi_system_id *d)
 244 {
 245         printk(KERN_INFO "PCI: %s detected, enabling pci=pcie_scan_all\n",
 246                d->ident);
 247         pci_add_flags(PCI_SCAN_ALL_PCIE_DEVS);
 248         return 0;
 249 }
 250
 251 static const struct dmi_system_id pciprobe_dmi_table[] __initconst = {
 252 #ifdef __i386__
 253 /*
 254  * Laptops which need pci=assign-busses to see Cardbus cards
 255  */
 256         {
 257                 .callback = assign_all_busses,
 258                 .ident = "Samsung X20 Laptop",
 259                 .matches = {
 260                         DMI_MATCH(DMI_SYS_VENDOR, "Samsung Electronics"),
 261                         DMI_MATCH(DMI_PRODUCT_NAME, "SX20S"),
 262                 },
 263         },
 264 #endif          /* __i386__ */
 265         {
 266                 .callback = set_bf_sort,
 267                 .ident = "Dell PowerEdge 1950",
 268                 .matches = {
 269                         DMI_MATCH(DMI_SYS_VENDOR, "Dell"),
 270                         DMI_MATCH(DMI_PRODUCT_NAME, "PowerEdge 1950"),
 271                 },
 272         },
 273         {
 274                 .callback = set_bf_sort,
 275                 .ident = "Dell PowerEdge 1955",
 276                 .matches = {
 277                         DMI_MATCH(DMI_SYS_VENDOR, "Dell"),
 278                         DMI_MATCH(DMI_PRODUCT_NAME, "PowerEdge 1955"),
 279                 },
 280         },
 281         {
 282                 .callback = set_bf_sort,
 283                 .ident = "Dell PowerEdge 2900",
 284                 .matches = {
 285                         DMI_MATCH(DMI_SYS_VENDOR, "Dell"),
 286                         DMI_MATCH(DMI_PRODUCT_NAME, "PowerEdge 2900"),
 287                 },
 288         },
 289         {
 290                 .callback = set_bf_sort,
 291                 .ident = "Dell PowerEdge 2950",
 292                 .matches = {
 293                         DMI_MATCH(DMI_SYS_VENDOR, "Dell"),
 294                         DMI_MATCH(DMI_PRODUCT_NAME, "PowerEdge 2950"),
 295                 },
 296         },
 297         {
 298                 .callback = set_bf_sort,
 299                 .ident = "Dell PowerEdge R900",
 300                 .matches = {
 301                         DMI_MATCH(DMI_SYS_VENDOR, "Dell"),
 302                         DMI_MATCH(DMI_PRODUCT_NAME, "PowerEdge R900"),
 303                 },
 304         },
 305         {
 306                 .callback = find_sort_method,
 307                 .ident = "Dell System",
 308                 .matches = {
 309                         DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc"),
 310                 },
 311         },
 312         {
 313                 .callback = set_bf_sort,
 314                 .ident = "HP ProLiant BL20p G3",
 315                 .matches = {
 316                         DMI_MATCH(DMI_SYS_VENDOR, "HP"),
 317                         DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant BL20p G3"),
 318                 },
 319         },
 320         {
 321                 .callback = set_bf_sort,
 322                 .ident = "HP ProLiant BL20p G4",
 323                 .matches = {
 324                         DMI_MATCH(DMI_SYS_VENDOR, "HP"),
 325                         DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant BL20p G4"),
 326                 },
 327         },
 328         {
 329                 .callback = set_bf_sort,
 330                 .ident = "HP ProLiant BL30p G1",
 331                 .matches = {
 332                         DMI_MATCH(DMI_SYS_VENDOR, "HP"),
 333                         DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant BL30p G1"),
 334                 },
 335         },
 336         {
 337                 .callback = set_bf_sort,
 338                 .ident = "HP ProLiant BL25p G1",
 339                 .matches = {
 340                         DMI_MATCH(DMI_SYS_VENDOR, "HP"),
 341                         DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant BL25p G1"),
 342                 },
 343         },
 344         {
 345                 .callback = set_bf_sort,
 346                 .ident = "HP ProLiant BL35p G1",
 347                 .matches = {
 348                         DMI_MATCH(DMI_SYS_VENDOR, "HP"),
 349                         DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant BL35p G1"),
 350                 },
 351         },
 352         {
 353                 .callback = set_bf_sort,
 354                 .ident = "HP ProLiant BL45p G1",
 355                 .matches = {
 356                         DMI_MATCH(DMI_SYS_VENDOR, "HP"),
 357                         DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant BL45p G1"),
 358                 },
 359         },
 360         {
 361                 .callback = set_bf_sort,
 362                 .ident = "HP ProLiant BL45p G2",
 363                 .matches = {
 364                         DMI_MATCH(DMI_SYS_VENDOR, "HP"),
 365                         DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant BL45p G2"),
 366                 },
 367         },
 368         {
 369                 .callback = set_bf_sort,
 370                 .ident = "HP ProLiant BL460c G1",
 371                 .matches = {
 372                         DMI_MATCH(DMI_SYS_VENDOR, "HP"),
 373                         DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant BL460c G1"),
 374                 },
 375         },
 376         {
 377                 .callback = set_bf_sort,
 378                 .ident = "HP ProLiant BL465c G1",
 379                 .matches = {
 380                         DMI_MATCH(DMI_SYS_VENDOR, "HP"),
 381                         DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant BL465c G1"),
 382                 },
 383         },
 384         {
 385                 .callback = set_bf_sort,
 386                 .ident = "HP ProLiant BL480c G1",
 387                 .matches = {
 388                         DMI_MATCH(DMI_SYS_VENDOR, "HP"),
 389                         DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant BL480c G1"),
 390                 },
 391         },
 392         {
 393                 .callback = set_bf_sort,
 394                 .ident = "HP ProLiant BL685c G1",
 395                 .matches = {
 396                         DMI_MATCH(DMI_SYS_VENDOR, "HP"),
 397                         DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant BL685c G1"),
 398                 },
 399         },
 400         {
 401                 .callback = set_bf_sort,
 402                 .ident = "HP ProLiant DL360",
 403                 .matches = {
 404                         DMI_MATCH(DMI_SYS_VENDOR, "HP"),
 405                         DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant DL360"),
 406                 },
 407         },
 408         {
 409                 .callback = set_bf_sort,
 410                 .ident = "HP ProLiant DL380",
 411                 .matches = {
 412                         DMI_MATCH(DMI_SYS_VENDOR, "HP"),
 413                         DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant DL380"),
 414                 },
 415         },
 416 #ifdef __i386__
 417         {
 418                 .callback = assign_all_busses,
 419                 .ident = "Compaq EVO N800c",
 420                 .matches = {
 421                         DMI_MATCH(DMI_SYS_VENDOR, "Compaq"),
 422                         DMI_MATCH(DMI_PRODUCT_NAME, "EVO N800c"),
 423                 },
 424         },
 425 #endif
 426         {
 427                 .callback = set_bf_sort,
 428                 .ident = "HP ProLiant DL385 G2",
 429                 .matches = {
 430                         DMI_MATCH(DMI_SYS_VENDOR, "HP"),
 431                         DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant DL385 G2"),
 432                 },
 433         },
 434         {
 435                 .callback = set_bf_sort,
 436                 .ident = "HP ProLiant DL585 G2",
 437                 .matches = {
 438                         DMI_MATCH(DMI_SYS_VENDOR, "HP"),
 439                         DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant DL585 G2"),
 440                 },
 441         },
 442         {
 443                 .callback = set_scan_all,
 444                 .ident = "Stratus/NEC ftServer",
 445                 .matches = {
 446                         DMI_MATCH(DMI_SYS_VENDOR, "Stratus"),
 447                         DMI_MATCH(DMI_PRODUCT_NAME, "ftServer"),
 448                 },
 449         },
 450         {
 451                 .callback = set_scan_all,
 452                 .ident = "Stratus/NEC ftServer",
 453                 .matches = {
 454                         DMI_MATCH(DMI_SYS_VENDOR, "NEC"),
 455                         DMI_MATCH(DMI_PRODUCT_NAME, "Express5800/R32"),
 456                 },
 457         },
 458         {
 459                 .callback = set_scan_all,
 460                 .ident = "Stratus/NEC ftServer",
 461                 .matches = {
 462                         DMI_MATCH(DMI_SYS_VENDOR, "NEC"),
 463                         DMI_MATCH(DMI_PRODUCT_NAME, "Express5800/R31"),
 464                 },
 465         },
 466         {}
 467 };
 468
 469 void __init dmi_check_pciprobe(void)
 470 {
 471         dmi_check_system(pciprobe_dmi_table);
 472 }
 473
 474 void pcibios_scan_root(int busnum)
 475 {
 476         struct pci_bus *bus;
 477         struct pci_sysdata *sd;
 478         LIST_HEAD(resources);
 479
 480         sd = kzalloc(sizeof(*sd), GFP_KERNEL);
 481         if (!sd) {
 482                 printk(KERN_ERR "PCI: OOM, skipping PCI bus %02x\n", busnum);
 483                 return;
 484         }
 485         sd->node = x86_pci_root_bus_node(busnum);
 486         x86_pci_root_bus_resources(busnum, &resources);
 487         printk(KERN_DEBUG "PCI: Probing PCI hardware (bus %02x)\n", busnum);
 488         bus = pci_scan_root_bus(NULL, busnum, &pci_root_ops, sd, &resources);
 489         if (!bus) {
 490                 pci_free_resource_list(&resources);
 491                 kfree(sd);
 492                 return;
 493         }
 494         pci_bus_add_devices(bus);
 495 }
 496
 497 void __init pcibios_set_cache_line_size(void)
 498 {
 499         struct cpuinfo_x86 *c = &boot_cpu_data;
 500
 501         /*
 502          * Set PCI cacheline size to that of the CPU if the CPU has reported it.
 503          * (For older CPUs that don't support cpuid, we se it to 32 bytes
 504          * It's also good for 386/486s (which actually have 16)
 505          * as quite a few PCI devices do not support smaller values.
 506          */
 507         if (c->x86_clflush_size > 0) {
 508                 pci_dfl_cache_line_size = c->x86_clflush_size >> 2;
 509                 printk(KERN_DEBUG "PCI: pci_cache_line_size set to %d bytes\n",
 510                         pci_dfl_cache_line_size << 2);
 511         } else {
 512                 pci_dfl_cache_line_size = 32 >> 2;
 513                 printk(KERN_DEBUG "PCI: Unknown cacheline size. Setting to 32 bytes\n");
 514         }
 515 }
 516
 517 int __init pcibios_init(void)
 518 {
 519         if (!raw_pci_ops) {
 520                 printk(KERN_WARNING "PCI: System does not support PCI\n");
 521                 return 0;
 522         }
 523
 524         pcibios_set_cache_line_size();
 525         pcibios_resource_survey();
 526
 527         if (pci_bf_sort >= pci_force_bf)
 528                 pci_sort_breadthfirst();
 529         return 0;
 530 }
 531
 532 char *__init pcibios_setup(char *str)
 533 {
 534         if (!strcmp(str, "off")) {
 535                 pci_probe = 0;
 536                 return NULL;
 537         } else if (!strcmp(str, "bfsort")) {
 538                 pci_bf_sort = pci_force_bf;
 539                 return NULL;
 540         } else if (!strcmp(str, "nobfsort")) {
 541                 pci_bf_sort = pci_force_nobf;
 542                 return NULL;
 543         }
 544 #ifdef CONFIG_PCI_BIOS
 545         else if (!strcmp(str, "bios")) {
 546                 pci_probe = PCI_PROBE_BIOS;
 547                 return NULL;
 548         } else if (!strcmp(str, "nobios")) {
 549                 pci_probe &= ~PCI_PROBE_BIOS;
 550                 return NULL;
 551         } else if (!strcmp(str, "biosirq")) {
 552                 pci_probe |= PCI_BIOS_IRQ_SCAN;
 553                 return NULL;
 554         } else if (!strncmp(str, "pirqaddr=", 9)) {
 555                 pirq_table_addr = simple_strtoul(str+9, NULL, 0);
 556                 return NULL;
 557         }
 558 #endif
 559 #ifdef CONFIG_PCI_DIRECT
 560         else if (!strcmp(str, "conf1")) {
 561                 pci_probe = PCI_PROBE_CONF1 | PCI_NO_CHECKS;
 562                 return NULL;
 563         }
 564         else if (!strcmp(str, "conf2")) {
 565                 pci_probe = PCI_PROBE_CONF2 | PCI_NO_CHECKS;
 566                 return NULL;
 567         }
 568 #endif
 569 #ifdef CONFIG_PCI_MMCONFIG
 570         else if (!strcmp(str, "nommconf")) {
 571                 pci_probe &= ~PCI_PROBE_MMCONF;
 572                 return NULL;
 573         }
 574         else if (!strcmp(str, "check_enable_amd_mmconf")) {
 575                 pci_probe |= PCI_CHECK_ENABLE_AMD_MMCONF;
 576                 return NULL;
 577         }
 578 #endif
 579         else if (!strcmp(str, "noacpi")) {
 580                 acpi_noirq_set();
 581                 return NULL;
 582         }
 583         else if (!strcmp(str, "noearly")) {
 584                 pci_probe |= PCI_PROBE_NOEARLY;
 585                 return NULL;
 586         }
 587         else if (!strcmp(str, "usepirqmask")) {
 588                 pci_probe |= PCI_USE_PIRQ_MASK;
 589                 return NULL;
 590         } else if (!strncmp(str, "irqmask=", 8)) {
 591                 pcibios_irq_mask = simple_strtol(str+8, NULL, 0);
 592                 return NULL;
 593         } else if (!strncmp(str, "lastbus=", 8)) {
 594                 pcibios_last_bus = simple_strtol(str+8, NULL, 0);
 595                 return NULL;
 596         } else if (!strcmp(str, "rom")) {
 597                 pci_probe |= PCI_ASSIGN_ROMS;
 598                 return NULL;
 599         } else if (!strcmp(str, "norom")) {
 600                 pci_probe |= PCI_NOASSIGN_ROMS;
 601                 return NULL;
 602         } else if (!strcmp(str, "nobar")) {
 603                 pci_probe |= PCI_NOASSIGN_BARS;
 604                 return NULL;
 605         } else if (!strcmp(str, "assign-busses")) {
 606                 pci_probe |= PCI_ASSIGN_ALL_BUSSES;
 607                 return NULL;
 608         } else if (!strcmp(str, "use_crs")) {
 609                 pci_probe |= PCI_USE__CRS;
 610                 return NULL;
 611         } else if (!strcmp(str, "nocrs")) {
 612                 pci_probe |= PCI_ROOT_NO_CRS;
 613                 return NULL;
 614         } else if (!strcmp(str, "earlydump")) {
 615                 pci_early_dump_regs = 1;
 616                 return NULL;
 617         } else if (!strcmp(str, "routeirq")) {
 618                 pci_routeirq = 1;
 619                 return NULL;
 620         } else if (!strcmp(str, "skip_isa_align")) {
 621                 pci_probe |= PCI_CAN_SKIP_ISA_ALIGN;
 622                 return NULL;
 623         } else if (!strcmp(str, "noioapicquirk")) {
 624                 noioapicquirk = 1;
 625                 return NULL;
 626         } else if (!strcmp(str, "ioapicreroute")) {
 627                 if (noioapicreroute != -1)
 628                         noioapicreroute = 0;
 629                 return NULL;
 630         } else if (!strcmp(str, "noioapicreroute")) {
 631                 if (noioapicreroute != -1)
 632                         noioapicreroute = 1;
 633                 return NULL;
 634         }
 635         return str;
 636 }
 637
 638 unsigned int pcibios_assign_all_busses(void)
 639 {
 640         return (pci_probe & PCI_ASSIGN_ALL_BUSSES) ? 1 : 0;
 641 }
 642
 643 #if defined(CONFIG_X86_DEV_DMA_OPS) && defined(CONFIG_PCI_DOMAINS)
 644 static LIST_HEAD(dma_domain_list);
 645 static DEFINE_SPINLOCK(dma_domain_list_lock);
 646
 647 void add_dma_domain(struct dma_domain *domain)
 648 {
 649         spin_lock(&dma_domain_list_lock);
 650         list_add(&domain->node, &dma_domain_list);
 651         spin_unlock(&dma_domain_list_lock);
 652 }
 653 EXPORT_SYMBOL_GPL(add_dma_domain);
 654
 655 void del_dma_domain(struct dma_domain *domain)
 656 {
 657         spin_lock(&dma_domain_list_lock);
 658         list_del(&domain->node);
 659         spin_unlock(&dma_domain_list_lock);
 660 }
 661 EXPORT_SYMBOL_GPL(del_dma_domain);
 662
 663 static void set_dma_domain_ops(struct pci_dev *pdev)
 664 {
 665         struct dma_domain *domain;
 666
 667         spin_lock(&dma_domain_list_lock);
 668         list_for_each_entry(domain, &dma_domain_list, node) {
 669                 if (pci_domain_nr(pdev->bus) == domain->domain_nr) {
 670                         pdev->dev.archdata.dma_ops = domain->dma_ops;
 671                         break;
 672                 }
 673         }
 674         spin_unlock(&dma_domain_list_lock);
 675 }
 676 #else
 677 static void set_dma_domain_ops(struct pci_dev *pdev) {}
 678 #endif
 679
 680 int pcibios_add_device(struct pci_dev *dev)
 681 {
 682         struct setup_data *data;
 683         struct pci_setup_rom *rom;
 684         u64 pa_data;
 685
 686         pa_data = boot_params.hdr.setup_data;
 687         while (pa_data) {
 688                 data = ioremap(pa_data, sizeof(*rom));
 689                 if (!data)
 690                         return -ENOMEM;
 691
 692                 if (data->type == SETUP_PCI) {
 693                         rom = (struct pci_setup_rom *)data;
 694
 695                         if ((pci_domain_nr(dev->bus) == rom->segment) &&
 696                             (dev->bus->number == rom->bus) &&
 697                             (PCI_SLOT(dev->devfn) == rom->device) &&
 698                             (PCI_FUNC(dev->devfn) == rom->function) &&
 699                             (dev->vendor == rom->vendor) &&
 700                             (dev->device == rom->devid)) {
 701                                 dev->rom = pa_data +
 702                                       offsetof(struct pci_setup_rom, romdata);
 703                                 dev->romlen = rom->pcilen;
 704                         }
 705                 }
 706                 pa_data = data->next;
 707                 iounmap(data);
 708         }
 709         set_dma_domain_ops(dev);
 710         return 0;
 711 }
 712
 713 int pcibios_enable_device(struct pci_dev *dev, int mask)
 714 {
 715         int err;
 716
 717         if ((err = pci_enable_resources(dev, mask)) < 0)
 718                 return err;
 719
 720         if (!pci_dev_msi_enabled(dev))
 721                 return pcibios_enable_irq(dev);
 722         return 0;
 723 }
 724
 725 void pcibios_disable_device (struct pci_dev *dev)
 726 {
 727         if (!pci_dev_msi_enabled(dev) && pcibios_disable_irq)
 728                 pcibios_disable_irq(dev);
 729 }
 730
 731 int pci_ext_cfg_avail(void)
 732 {
 733         if (raw_pci_ext_ops)
 734                 return 1;
 735         else
 736                 return 0;
 737 }