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