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x86/PCI: Refine the way to release PCI IRQ resources
[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 };
453
454 void __init dmi_check_pciprobe(void)
455 {
456         dmi_check_system(pciprobe_dmi_table);
457 }
458
459 void pcibios_scan_root(int busnum)
460 {
461         struct pci_bus *bus;
462         struct pci_sysdata *sd;
463         LIST_HEAD(resources);
464
465         sd = kzalloc(sizeof(*sd), GFP_KERNEL);
466         if (!sd) {
467                 printk(KERN_ERR "PCI: OOM, skipping PCI bus %02x\n", busnum);
468                 return;
469         }
470         sd->node = x86_pci_root_bus_node(busnum);
471         x86_pci_root_bus_resources(busnum, &resources);
472         printk(KERN_DEBUG "PCI: Probing PCI hardware (bus %02x)\n", busnum);
473         bus = pci_scan_root_bus(NULL, busnum, &pci_root_ops, sd, &resources);
474         if (!bus) {
475                 pci_free_resource_list(&resources);
476                 kfree(sd);
477         }
478 }
479
480 void __init pcibios_set_cache_line_size(void)
481 {
482         struct cpuinfo_x86 *c = &boot_cpu_data;
483
484         /*
485          * Set PCI cacheline size to that of the CPU if the CPU has reported it.
486          * (For older CPUs that don't support cpuid, we se it to 32 bytes
487          * It's also good for 386/486s (which actually have 16)
488          * as quite a few PCI devices do not support smaller values.
489          */
490         if (c->x86_clflush_size > 0) {
491                 pci_dfl_cache_line_size = c->x86_clflush_size >> 2;
492                 printk(KERN_DEBUG "PCI: pci_cache_line_size set to %d bytes\n",
493                         pci_dfl_cache_line_size << 2);
494         } else {
495                 pci_dfl_cache_line_size = 32 >> 2;
496                 printk(KERN_DEBUG "PCI: Unknown cacheline size. Setting to 32 bytes\n");
497         }
498 }
499
500 /*
501  * Some device drivers assume dev->irq won't change after calling
502  * pci_disable_device(). So delay releasing of IRQ resource to driver
503  * unbinding time. Otherwise it will break PM subsystem and drivers
504  * like xen-pciback etc.
505  */
506 static int pci_irq_notifier(struct notifier_block *nb, unsigned long action,
507                             void *data)
508 {
509         struct pci_dev *dev = to_pci_dev(data);
510
511         if (action != BUS_NOTIFY_UNBOUND_DRIVER)
512                 return NOTIFY_DONE;
513
514         if (pcibios_disable_irq)
515                 pcibios_disable_irq(dev);
516
517         return NOTIFY_OK;
518 }
519
520 static struct notifier_block pci_irq_nb = {
521         .notifier_call = pci_irq_notifier,
522         .priority = INT_MIN,
523 };
524
525 int __init pcibios_init(void)
526 {
527         if (!raw_pci_ops) {
528                 printk(KERN_WARNING "PCI: System does not support PCI\n");
529                 return 0;
530         }
531
532         pcibios_set_cache_line_size();
533         pcibios_resource_survey();
534
535         if (pci_bf_sort >= pci_force_bf)
536                 pci_sort_breadthfirst();
537
538         bus_register_notifier(&pci_bus_type, &pci_irq_nb);
539
540         return 0;
541 }
542
543 char *__init pcibios_setup(char *str)
544 {
545         if (!strcmp(str, "off")) {
546                 pci_probe = 0;
547                 return NULL;
548         } else if (!strcmp(str, "bfsort")) {
549                 pci_bf_sort = pci_force_bf;
550                 return NULL;
551         } else if (!strcmp(str, "nobfsort")) {
552                 pci_bf_sort = pci_force_nobf;
553                 return NULL;
554         }
555 #ifdef CONFIG_PCI_BIOS
556         else if (!strcmp(str, "bios")) {
557                 pci_probe = PCI_PROBE_BIOS;
558                 return NULL;
559         } else if (!strcmp(str, "nobios")) {
560                 pci_probe &= ~PCI_PROBE_BIOS;
561                 return NULL;
562         } else if (!strcmp(str, "biosirq")) {
563                 pci_probe |= PCI_BIOS_IRQ_SCAN;
564                 return NULL;
565         } else if (!strncmp(str, "pirqaddr=", 9)) {
566                 pirq_table_addr = simple_strtoul(str+9, NULL, 0);
567                 return NULL;
568         }
569 #endif
570 #ifdef CONFIG_PCI_DIRECT
571         else if (!strcmp(str, "conf1")) {
572                 pci_probe = PCI_PROBE_CONF1 | PCI_NO_CHECKS;
573                 return NULL;
574         }
575         else if (!strcmp(str, "conf2")) {
576                 pci_probe = PCI_PROBE_CONF2 | PCI_NO_CHECKS;
577                 return NULL;
578         }
579 #endif
580 #ifdef CONFIG_PCI_MMCONFIG
581         else if (!strcmp(str, "nommconf")) {
582                 pci_probe &= ~PCI_PROBE_MMCONF;
583                 return NULL;
584         }
585         else if (!strcmp(str, "check_enable_amd_mmconf")) {
586                 pci_probe |= PCI_CHECK_ENABLE_AMD_MMCONF;
587                 return NULL;
588         }
589 #endif
590         else if (!strcmp(str, "noacpi")) {
591                 acpi_noirq_set();
592                 return NULL;
593         }
594         else if (!strcmp(str, "noearly")) {
595                 pci_probe |= PCI_PROBE_NOEARLY;
596                 return NULL;
597         }
598         else if (!strcmp(str, "usepirqmask")) {
599                 pci_probe |= PCI_USE_PIRQ_MASK;
600                 return NULL;
601         } else if (!strncmp(str, "irqmask=", 8)) {
602                 pcibios_irq_mask = simple_strtol(str+8, NULL, 0);
603                 return NULL;
604         } else if (!strncmp(str, "lastbus=", 8)) {
605                 pcibios_last_bus = simple_strtol(str+8, NULL, 0);
606                 return NULL;
607         } else if (!strcmp(str, "rom")) {
608                 pci_probe |= PCI_ASSIGN_ROMS;
609                 return NULL;
610         } else if (!strcmp(str, "norom")) {
611                 pci_probe |= PCI_NOASSIGN_ROMS;
612                 return NULL;
613         } else if (!strcmp(str, "nobar")) {
614                 pci_probe |= PCI_NOASSIGN_BARS;
615                 return NULL;
616         } else if (!strcmp(str, "assign-busses")) {
617                 pci_probe |= PCI_ASSIGN_ALL_BUSSES;
618                 return NULL;
619         } else if (!strcmp(str, "use_crs")) {
620                 pci_probe |= PCI_USE__CRS;
621                 return NULL;
622         } else if (!strcmp(str, "nocrs")) {
623                 pci_probe |= PCI_ROOT_NO_CRS;
624                 return NULL;
625         } else if (!strcmp(str, "earlydump")) {
626                 pci_early_dump_regs = 1;
627                 return NULL;
628         } else if (!strcmp(str, "routeirq")) {
629                 pci_routeirq = 1;
630                 return NULL;
631         } else if (!strcmp(str, "skip_isa_align")) {
632                 pci_probe |= PCI_CAN_SKIP_ISA_ALIGN;
633                 return NULL;
634         } else if (!strcmp(str, "noioapicquirk")) {
635                 noioapicquirk = 1;
636                 return NULL;
637         } else if (!strcmp(str, "ioapicreroute")) {
638                 if (noioapicreroute != -1)
639                         noioapicreroute = 0;
640                 return NULL;
641         } else if (!strcmp(str, "noioapicreroute")) {
642                 if (noioapicreroute != -1)
643                         noioapicreroute = 1;
644                 return NULL;
645         }
646         return str;
647 }
648
649 unsigned int pcibios_assign_all_busses(void)
650 {
651         return (pci_probe & PCI_ASSIGN_ALL_BUSSES) ? 1 : 0;
652 }
653
654 int pcibios_add_device(struct pci_dev *dev)
655 {
656         struct setup_data *data;
657         struct pci_setup_rom *rom;
658         u64 pa_data;
659
660         pa_data = boot_params.hdr.setup_data;
661         while (pa_data) {
662                 data = ioremap(pa_data, sizeof(*rom));
663                 if (!data)
664                         return -ENOMEM;
665
666                 if (data->type == SETUP_PCI) {
667                         rom = (struct pci_setup_rom *)data;
668
669                         if ((pci_domain_nr(dev->bus) == rom->segment) &&
670                             (dev->bus->number == rom->bus) &&
671                             (PCI_SLOT(dev->devfn) == rom->device) &&
672                             (PCI_FUNC(dev->devfn) == rom->function) &&
673                             (dev->vendor == rom->vendor) &&
674                             (dev->device == rom->devid)) {
675                                 dev->rom = pa_data +
676                                       offsetof(struct pci_setup_rom, romdata);
677                                 dev->romlen = rom->pcilen;
678                         }
679                 }
680                 pa_data = data->next;
681                 iounmap(data);
682         }
683         return 0;
684 }
685
686 int pcibios_enable_device(struct pci_dev *dev, int mask)
687 {
688         int err;
689
690         if ((err = pci_enable_resources(dev, mask)) < 0)
691                 return err;
692
693         if (!pci_dev_msi_enabled(dev))
694                 return pcibios_enable_irq(dev);
695         return 0;
696 }
697
698 int pci_ext_cfg_avail(void)
699 {
700         if (raw_pci_ext_ops)
701                 return 1;
702         else
703                 return 0;
704 }