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7#include <linux/sched.h>
8#include <linux/pci.h>
9#include <linux/ioport.h>
10#include <linux/init.h>
11#include <linux/dmi.h>
12#include <linux/slab.h>
13
14#include <asm/acpi.h>
15#include <asm/segment.h>
16#include <asm/io.h>
17#include <asm/smp.h>
18#include <asm/pci_x86.h>
19
20unsigned int pci_probe = PCI_PROBE_BIOS | PCI_PROBE_CONF1 | PCI_PROBE_CONF2 |
21 PCI_PROBE_MMCONF;
22
23unsigned int pci_early_dump_regs;
24static int pci_bf_sort;
25static int smbios_type_b1_flag;
26int pci_routeirq;
27int noioapicquirk;
28#ifdef CONFIG_X86_REROUTE_FOR_BROKEN_BOOT_IRQS
29int noioapicreroute = 0;
30#else
31int noioapicreroute = 1;
32#endif
33int pcibios_last_bus = -1;
34unsigned long pirq_table_addr;
35struct pci_bus *pci_root_bus;
36struct pci_raw_ops *raw_pci_ops;
37struct pci_raw_ops *raw_pci_ext_ops;
38
39int raw_pci_read(unsigned int domain, unsigned int bus, unsigned int devfn,
40 int reg, int len, u32 *val)
41{
42 if (domain == 0 && reg < 256 && raw_pci_ops)
43 return raw_pci_ops->read(domain, bus, devfn, reg, len, val);
44 if (raw_pci_ext_ops)
45 return raw_pci_ext_ops->read(domain, bus, devfn, reg, len, val);
46 return -EINVAL;
47}
48
49int raw_pci_write(unsigned int domain, unsigned int bus, unsigned int devfn,
50 int reg, int len, u32 val)
51{
52 if (domain == 0 && reg < 256 && raw_pci_ops)
53 return raw_pci_ops->write(domain, bus, devfn, reg, len, val);
54 if (raw_pci_ext_ops)
55 return raw_pci_ext_ops->write(domain, bus, devfn, reg, len, val);
56 return -EINVAL;
57}
58
59static int pci_read(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 *value)
60{
61 return raw_pci_read(pci_domain_nr(bus), bus->number,
62 devfn, where, size, value);
63}
64
65static int pci_write(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 value)
66{
67 return raw_pci_write(pci_domain_nr(bus), bus->number,
68 devfn, where, size, value);
69}
70
71struct pci_ops pci_root_ops = {
72 .read = pci_read,
73 .write = pci_write,
74};
75
76
77
78
79
80DEFINE_RAW_SPINLOCK(pci_config_lock);
81
82static int __devinit can_skip_ioresource_align(const struct dmi_system_id *d)
83{
84 pci_probe |= PCI_CAN_SKIP_ISA_ALIGN;
85 printk(KERN_INFO "PCI: %s detected, can skip ISA alignment\n", d->ident);
86 return 0;
87}
88
89static const struct dmi_system_id can_skip_pciprobe_dmi_table[] __devinitconst = {
90
91
92
93
94 {
95 .callback = can_skip_ioresource_align,
96 .ident = "IBM System x3800",
97 .matches = {
98 DMI_MATCH(DMI_SYS_VENDOR, "IBM"),
99 DMI_MATCH(DMI_PRODUCT_NAME, "x3800"),
100 },
101 },
102 {
103 .callback = can_skip_ioresource_align,
104 .ident = "IBM System x3850",
105 .matches = {
106 DMI_MATCH(DMI_SYS_VENDOR, "IBM"),
107 DMI_MATCH(DMI_PRODUCT_NAME, "x3850"),
108 },
109 },
110 {
111 .callback = can_skip_ioresource_align,
112 .ident = "IBM System x3950",
113 .matches = {
114 DMI_MATCH(DMI_SYS_VENDOR, "IBM"),
115 DMI_MATCH(DMI_PRODUCT_NAME, "x3950"),
116 },
117 },
118 {}
119};
120
121void __init dmi_check_skip_isa_align(void)
122{
123 dmi_check_system(can_skip_pciprobe_dmi_table);
124}
125
126static void __devinit pcibios_fixup_device_resources(struct pci_dev *dev)
127{
128 struct resource *rom_r = &dev->resource[PCI_ROM_RESOURCE];
129 struct resource *bar_r;
130 int bar;
131
132 if (pci_probe & PCI_NOASSIGN_BARS) {
133
134
135
136
137
138 for (bar = 0; bar <= PCI_STD_RESOURCE_END; bar++) {
139 bar_r = &dev->resource[bar];
140 if (bar_r->start == 0 && bar_r->end != 0) {
141 bar_r->flags = 0;
142 bar_r->end = 0;
143 }
144 }
145 }
146
147 if (pci_probe & PCI_NOASSIGN_ROMS) {
148 if (rom_r->parent)
149 return;
150 if (rom_r->start) {
151
152 return;
153 }
154 rom_r->start = rom_r->end = rom_r->flags = 0;
155 }
156}
157
158
159
160
161
162
163void __devinit pcibios_fixup_bus(struct pci_bus *b)
164{
165 struct pci_dev *dev;
166
167
168 if (!b->parent)
169 x86_pci_root_bus_res_quirks(b);
170 pci_read_bridge_bases(b);
171 list_for_each_entry(dev, &b->devices, bus_list)
172 pcibios_fixup_device_resources(dev);
173}
174
175
176
177
178
179
180static int __devinit set_bf_sort(const struct dmi_system_id *d)
181{
182 if (pci_bf_sort == pci_bf_sort_default) {
183 pci_bf_sort = pci_dmi_bf;
184 printk(KERN_INFO "PCI: %s detected, enabling pci=bfsort.\n", d->ident);
185 }
186 return 0;
187}
188
189static void __devinit read_dmi_type_b1(const struct dmi_header *dm,
190 void *private_data)
191{
192 u8 *d = (u8 *)dm + 4;
193
194 if (dm->type != 0xB1)
195 return;
196 switch (((*(u32 *)d) >> 9) & 0x03) {
197 case 0x00:
198 printk(KERN_INFO "dmi type 0xB1 record - unknown flag\n");
199 break;
200 case 0x01:
201 smbios_type_b1_flag = 1;
202 break;
203 case 0x02:
204 smbios_type_b1_flag = 2;
205 break;
206 default:
207 break;
208 }
209}
210
211static int __devinit find_sort_method(const struct dmi_system_id *d)
212{
213 dmi_walk(read_dmi_type_b1, NULL);
214
215 if (smbios_type_b1_flag == 1) {
216 set_bf_sort(d);
217 return 0;
218 }
219 return -1;
220}
221
222
223
224
225#ifdef __i386__
226static int __devinit assign_all_busses(const struct dmi_system_id *d)
227{
228 pci_probe |= PCI_ASSIGN_ALL_BUSSES;
229 printk(KERN_INFO "%s detected: enabling PCI bus# renumbering"
230 " (pci=assign-busses)\n", d->ident);
231 return 0;
232}
233#endif
234
235static const struct dmi_system_id __devinitconst pciprobe_dmi_table[] = {
236#ifdef __i386__
237
238
239
240 {
241 .callback = assign_all_busses,
242 .ident = "Samsung X20 Laptop",
243 .matches = {
244 DMI_MATCH(DMI_SYS_VENDOR, "Samsung Electronics"),
245 DMI_MATCH(DMI_PRODUCT_NAME, "SX20S"),
246 },
247 },
248#endif
249 {
250 .callback = find_sort_method,
251 .ident = "Dell System",
252 .matches = {
253 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc"),
254 },
255 },
256 {
257 .callback = set_bf_sort,
258 .ident = "Dell PowerEdge 1950",
259 .matches = {
260 DMI_MATCH(DMI_SYS_VENDOR, "Dell"),
261 DMI_MATCH(DMI_PRODUCT_NAME, "PowerEdge 1950"),
262 },
263 },
264 {
265 .callback = set_bf_sort,
266 .ident = "Dell PowerEdge 1955",
267 .matches = {
268 DMI_MATCH(DMI_SYS_VENDOR, "Dell"),
269 DMI_MATCH(DMI_PRODUCT_NAME, "PowerEdge 1955"),
270 },
271 },
272 {
273 .callback = set_bf_sort,
274 .ident = "Dell PowerEdge 2900",
275 .matches = {
276 DMI_MATCH(DMI_SYS_VENDOR, "Dell"),
277 DMI_MATCH(DMI_PRODUCT_NAME, "PowerEdge 2900"),
278 },
279 },
280 {
281 .callback = set_bf_sort,
282 .ident = "Dell PowerEdge 2950",
283 .matches = {
284 DMI_MATCH(DMI_SYS_VENDOR, "Dell"),
285 DMI_MATCH(DMI_PRODUCT_NAME, "PowerEdge 2950"),
286 },
287 },
288 {
289 .callback = set_bf_sort,
290 .ident = "Dell PowerEdge R900",
291 .matches = {
292 DMI_MATCH(DMI_SYS_VENDOR, "Dell"),
293 DMI_MATCH(DMI_PRODUCT_NAME, "PowerEdge R900"),
294 },
295 },
296 {
297 .callback = set_bf_sort,
298 .ident = "HP ProLiant BL20p G3",
299 .matches = {
300 DMI_MATCH(DMI_SYS_VENDOR, "HP"),
301 DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant BL20p G3"),
302 },
303 },
304 {
305 .callback = set_bf_sort,
306 .ident = "HP ProLiant BL20p G4",
307 .matches = {
308 DMI_MATCH(DMI_SYS_VENDOR, "HP"),
309 DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant BL20p G4"),
310 },
311 },
312 {
313 .callback = set_bf_sort,
314 .ident = "HP ProLiant BL30p G1",
315 .matches = {
316 DMI_MATCH(DMI_SYS_VENDOR, "HP"),
317 DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant BL30p G1"),
318 },
319 },
320 {
321 .callback = set_bf_sort,
322 .ident = "HP ProLiant BL25p G1",
323 .matches = {
324 DMI_MATCH(DMI_SYS_VENDOR, "HP"),
325 DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant BL25p G1"),
326 },
327 },
328 {
329 .callback = set_bf_sort,
330 .ident = "HP ProLiant BL35p G1",
331 .matches = {
332 DMI_MATCH(DMI_SYS_VENDOR, "HP"),
333 DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant BL35p G1"),
334 },
335 },
336 {
337 .callback = set_bf_sort,
338 .ident = "HP ProLiant BL45p G1",
339 .matches = {
340 DMI_MATCH(DMI_SYS_VENDOR, "HP"),
341 DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant BL45p G1"),
342 },
343 },
344 {
345 .callback = set_bf_sort,
346 .ident = "HP ProLiant BL45p G2",
347 .matches = {
348 DMI_MATCH(DMI_SYS_VENDOR, "HP"),
349 DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant BL45p G2"),
350 },
351 },
352 {
353 .callback = set_bf_sort,
354 .ident = "HP ProLiant BL460c G1",
355 .matches = {
356 DMI_MATCH(DMI_SYS_VENDOR, "HP"),
357 DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant BL460c G1"),
358 },
359 },
360 {
361 .callback = set_bf_sort,
362 .ident = "HP ProLiant BL465c G1",
363 .matches = {
364 DMI_MATCH(DMI_SYS_VENDOR, "HP"),
365 DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant BL465c G1"),
366 },
367 },
368 {
369 .callback = set_bf_sort,
370 .ident = "HP ProLiant BL480c G1",
371 .matches = {
372 DMI_MATCH(DMI_SYS_VENDOR, "HP"),
373 DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant BL480c G1"),
374 },
375 },
376 {
377 .callback = set_bf_sort,
378 .ident = "HP ProLiant BL685c G1",
379 .matches = {
380 DMI_MATCH(DMI_SYS_VENDOR, "HP"),
381 DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant BL685c G1"),
382 },
383 },
384 {
385 .callback = set_bf_sort,
386 .ident = "HP ProLiant DL360",
387 .matches = {
388 DMI_MATCH(DMI_SYS_VENDOR, "HP"),
389 DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant DL360"),
390 },
391 },
392 {
393 .callback = set_bf_sort,
394 .ident = "HP ProLiant DL380",
395 .matches = {
396 DMI_MATCH(DMI_SYS_VENDOR, "HP"),
397 DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant DL380"),
398 },
399 },
400#ifdef __i386__
401 {
402 .callback = assign_all_busses,
403 .ident = "Compaq EVO N800c",
404 .matches = {
405 DMI_MATCH(DMI_SYS_VENDOR, "Compaq"),
406 DMI_MATCH(DMI_PRODUCT_NAME, "EVO N800c"),
407 },
408 },
409#endif
410 {
411 .callback = set_bf_sort,
412 .ident = "HP ProLiant DL385 G2",
413 .matches = {
414 DMI_MATCH(DMI_SYS_VENDOR, "HP"),
415 DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant DL385 G2"),
416 },
417 },
418 {
419 .callback = set_bf_sort,
420 .ident = "HP ProLiant DL585 G2",
421 .matches = {
422 DMI_MATCH(DMI_SYS_VENDOR, "HP"),
423 DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant DL585 G2"),
424 },
425 },
426 {}
427};
428
429void __init dmi_check_pciprobe(void)
430{
431 dmi_check_system(pciprobe_dmi_table);
432}
433
434struct pci_bus * __devinit pcibios_scan_root(int busnum)
435{
436 struct pci_bus *bus = NULL;
437 struct pci_sysdata *sd;
438
439 while ((bus = pci_find_next_bus(bus)) != NULL) {
440 if (bus->number == busnum) {
441
442 return bus;
443 }
444 }
445
446
447
448
449
450 sd = kzalloc(sizeof(*sd), GFP_KERNEL);
451 if (!sd) {
452 printk(KERN_ERR "PCI: OOM, not probing PCI bus %02x\n", busnum);
453 return NULL;
454 }
455
456 sd->node = get_mp_bus_to_node(busnum);
457
458 printk(KERN_DEBUG "PCI: Probing PCI hardware (bus %02x)\n", busnum);
459 bus = pci_scan_bus_parented(NULL, busnum, &pci_root_ops, sd);
460 if (!bus)
461 kfree(sd);
462
463 return bus;
464}
465void __init pcibios_set_cache_line_size(void)
466{
467 struct cpuinfo_x86 *c = &boot_cpu_data;
468
469
470
471
472
473
474
475 if (c->x86_clflush_size > 0) {
476 pci_dfl_cache_line_size = c->x86_clflush_size >> 2;
477 printk(KERN_DEBUG "PCI: pci_cache_line_size set to %d bytes\n",
478 pci_dfl_cache_line_size << 2);
479 } else {
480 pci_dfl_cache_line_size = 32 >> 2;
481 printk(KERN_DEBUG "PCI: Unknown cacheline size. Setting to 32 bytes\n");
482 }
483}
484
485int __init pcibios_init(void)
486{
487 if (!raw_pci_ops) {
488 printk(KERN_WARNING "PCI: System does not support PCI\n");
489 return 0;
490 }
491
492 pcibios_set_cache_line_size();
493 pcibios_resource_survey();
494
495 if (pci_bf_sort >= pci_force_bf)
496 pci_sort_breadthfirst();
497 return 0;
498}
499
500char * __devinit pcibios_setup(char *str)
501{
502 if (!strcmp(str, "off")) {
503 pci_probe = 0;
504 return NULL;
505 } else if (!strcmp(str, "bfsort")) {
506 pci_bf_sort = pci_force_bf;
507 return NULL;
508 } else if (!strcmp(str, "nobfsort")) {
509 pci_bf_sort = pci_force_nobf;
510 return NULL;
511 }
512#ifdef CONFIG_PCI_BIOS
513 else if (!strcmp(str, "bios")) {
514 pci_probe = PCI_PROBE_BIOS;
515 return NULL;
516 } else if (!strcmp(str, "nobios")) {
517 pci_probe &= ~PCI_PROBE_BIOS;
518 return NULL;
519 } else if (!strcmp(str, "biosirq")) {
520 pci_probe |= PCI_BIOS_IRQ_SCAN;
521 return NULL;
522 } else if (!strncmp(str, "pirqaddr=", 9)) {
523 pirq_table_addr = simple_strtoul(str+9, NULL, 0);
524 return NULL;
525 }
526#endif
527#ifdef CONFIG_PCI_DIRECT
528 else if (!strcmp(str, "conf1")) {
529 pci_probe = PCI_PROBE_CONF1 | PCI_NO_CHECKS;
530 return NULL;
531 }
532 else if (!strcmp(str, "conf2")) {
533 pci_probe = PCI_PROBE_CONF2 | PCI_NO_CHECKS;
534 return NULL;
535 }
536#endif
537#ifdef CONFIG_PCI_MMCONFIG
538 else if (!strcmp(str, "nommconf")) {
539 pci_probe &= ~PCI_PROBE_MMCONF;
540 return NULL;
541 }
542 else if (!strcmp(str, "check_enable_amd_mmconf")) {
543 pci_probe |= PCI_CHECK_ENABLE_AMD_MMCONF;
544 return NULL;
545 }
546#endif
547 else if (!strcmp(str, "noacpi")) {
548 acpi_noirq_set();
549 return NULL;
550 }
551 else if (!strcmp(str, "noearly")) {
552 pci_probe |= PCI_PROBE_NOEARLY;
553 return NULL;
554 }
555#ifndef CONFIG_X86_VISWS
556 else if (!strcmp(str, "usepirqmask")) {
557 pci_probe |= PCI_USE_PIRQ_MASK;
558 return NULL;
559 } else if (!strncmp(str, "irqmask=", 8)) {
560 pcibios_irq_mask = simple_strtol(str+8, NULL, 0);
561 return NULL;
562 } else if (!strncmp(str, "lastbus=", 8)) {
563 pcibios_last_bus = simple_strtol(str+8, NULL, 0);
564 return NULL;
565 }
566#endif
567 else if (!strcmp(str, "rom")) {
568 pci_probe |= PCI_ASSIGN_ROMS;
569 return NULL;
570 } else if (!strcmp(str, "norom")) {
571 pci_probe |= PCI_NOASSIGN_ROMS;
572 return NULL;
573 } else if (!strcmp(str, "nobar")) {
574 pci_probe |= PCI_NOASSIGN_BARS;
575 return NULL;
576 } else if (!strcmp(str, "assign-busses")) {
577 pci_probe |= PCI_ASSIGN_ALL_BUSSES;
578 return NULL;
579 } else if (!strcmp(str, "use_crs")) {
580 pci_probe |= PCI_USE__CRS;
581 return NULL;
582 } else if (!strcmp(str, "nocrs")) {
583 pci_probe |= PCI_ROOT_NO_CRS;
584 return NULL;
585 } else if (!strcmp(str, "earlydump")) {
586 pci_early_dump_regs = 1;
587 return NULL;
588 } else if (!strcmp(str, "routeirq")) {
589 pci_routeirq = 1;
590 return NULL;
591 } else if (!strcmp(str, "skip_isa_align")) {
592 pci_probe |= PCI_CAN_SKIP_ISA_ALIGN;
593 return NULL;
594 } else if (!strcmp(str, "noioapicquirk")) {
595 noioapicquirk = 1;
596 return NULL;
597 } else if (!strcmp(str, "ioapicreroute")) {
598 if (noioapicreroute != -1)
599 noioapicreroute = 0;
600 return NULL;
601 } else if (!strcmp(str, "noioapicreroute")) {
602 if (noioapicreroute != -1)
603 noioapicreroute = 1;
604 return NULL;
605 }
606 return str;
607}
608
609unsigned int pcibios_assign_all_busses(void)
610{
611 return (pci_probe & PCI_ASSIGN_ALL_BUSSES) ? 1 : 0;
612}
613
614int pcibios_enable_device(struct pci_dev *dev, int mask)
615{
616 int err;
617
618 if ((err = pci_enable_resources(dev, mask)) < 0)
619 return err;
620
621 if (!pci_dev_msi_enabled(dev))
622 return pcibios_enable_irq(dev);
623 return 0;
624}
625
626void pcibios_disable_device (struct pci_dev *dev)
627{
628 if (!pci_dev_msi_enabled(dev) && pcibios_disable_irq)
629 pcibios_disable_irq(dev);
630}
631
632int pci_ext_cfg_avail(struct pci_dev *dev)
633{
634 if (raw_pci_ext_ops)
635 return 1;
636 else
637 return 0;
638}
639
640struct pci_bus * __devinit pci_scan_bus_on_node(int busno, struct pci_ops *ops, int node)
641{
642 struct pci_bus *bus = NULL;
643 struct pci_sysdata *sd;
644
645
646
647
648
649
650 sd = kzalloc(sizeof(*sd), GFP_KERNEL);
651 if (!sd) {
652 printk(KERN_ERR "PCI: OOM, skipping PCI bus %02x\n", busno);
653 return NULL;
654 }
655 sd->node = node;
656 bus = pci_scan_bus(busno, ops, sd);
657 if (!bus)
658 kfree(sd);
659
660 return bus;
661}
662
663struct pci_bus * __devinit pci_scan_bus_with_sysdata(int busno)
664{
665 return pci_scan_bus_on_node(busno, &pci_root_ops, -1);
666}
667
668
669
670
671
672
673
674
675
676#ifdef CONFIG_NUMA
677
678#define BUS_NR 256
679
680#ifdef CONFIG_X86_64
681
682static int mp_bus_to_node[BUS_NR] = {
683 [0 ... BUS_NR - 1] = -1
684};
685
686void set_mp_bus_to_node(int busnum, int node)
687{
688 if (busnum >= 0 && busnum < BUS_NR)
689 mp_bus_to_node[busnum] = node;
690}
691
692int get_mp_bus_to_node(int busnum)
693{
694 int node = -1;
695
696 if (busnum < 0 || busnum > (BUS_NR - 1))
697 return node;
698
699 node = mp_bus_to_node[busnum];
700
701
702
703
704
705 if (node != -1 && !node_online(node))
706 node = -1;
707
708 return node;
709}
710
711#else
712
713static int mp_bus_to_node[BUS_NR] = {
714 [0 ... BUS_NR - 1] = -1
715};
716
717void set_mp_bus_to_node(int busnum, int node)
718{
719 if (busnum >= 0 && busnum < BUS_NR)
720 mp_bus_to_node[busnum] = (unsigned char) node;
721}
722
723int get_mp_bus_to_node(int busnum)
724{
725 int node;
726
727 if (busnum < 0 || busnum > (BUS_NR - 1))
728 return 0;
729 node = mp_bus_to_node[busnum];
730 return node;
731}
732
733#endif
734
735#endif
736