1#include <linux/pci.h>
2#include <linux/acpi.h>
3#include <linux/init.h>
4#include <linux/irq.h>
5#include <linux/dmi.h>
6#include <linux/slab.h>
7#include <asm/numa.h>
8#include <asm/pci_x86.h>
9
10struct pci_root_info {
11 struct acpi_device *bridge;
12 char name[16];
13 unsigned int res_num;
14 struct resource *res;
15 resource_size_t *res_offset;
16 struct pci_sysdata sd;
17#ifdef CONFIG_PCI_MMCONFIG
18 bool mcfg_added;
19 u16 segment;
20 u8 start_bus;
21 u8 end_bus;
22#endif
23};
24
25static bool pci_use_crs = true;
26static bool pci_ignore_seg = false;
27
28static int __init set_use_crs(const struct dmi_system_id *id)
29{
30 pci_use_crs = true;
31 return 0;
32}
33
34static int __init set_nouse_crs(const struct dmi_system_id *id)
35{
36 pci_use_crs = false;
37 return 0;
38}
39
40static int __init set_ignore_seg(const struct dmi_system_id *id)
41{
42 printk(KERN_INFO "PCI: %s detected: ignoring ACPI _SEG\n", id->ident);
43 pci_ignore_seg = true;
44 return 0;
45}
46
47static const struct dmi_system_id pci_crs_quirks[] __initconst = {
48
49 {
50 .callback = set_use_crs,
51 .ident = "IBM System x3800",
52 .matches = {
53 DMI_MATCH(DMI_SYS_VENDOR, "IBM"),
54 DMI_MATCH(DMI_PRODUCT_NAME, "x3800"),
55 },
56 },
57
58
59 {
60 .callback = set_use_crs,
61 .ident = "ASRock ALiveSATA2-GLAN",
62 .matches = {
63 DMI_MATCH(DMI_PRODUCT_NAME, "ALiveSATA2-GLAN"),
64 },
65 },
66
67
68 {
69 .callback = set_use_crs,
70 .ident = "ASUS M2V-MX SE",
71 .matches = {
72 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
73 DMI_MATCH(DMI_BOARD_NAME, "M2V-MX SE"),
74 DMI_MATCH(DMI_BIOS_VENDOR, "American Megatrends Inc."),
75 },
76 },
77
78 {
79 .callback = set_use_crs,
80 .ident = "MSI MS-7253",
81 .matches = {
82 DMI_MATCH(DMI_BOARD_VENDOR, "MICRO-STAR INTERNATIONAL CO., LTD"),
83 DMI_MATCH(DMI_BOARD_NAME, "MS-7253"),
84 DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies, LTD"),
85 },
86 },
87
88
89
90
91 {
92 .callback = set_nouse_crs,
93 .ident = "Dell Studio 1557",
94 .matches = {
95 DMI_MATCH(DMI_BOARD_VENDOR, "Dell Inc."),
96 DMI_MATCH(DMI_PRODUCT_NAME, "Studio 1557"),
97 DMI_MATCH(DMI_BIOS_VERSION, "A09"),
98 },
99 },
100
101 {
102 .callback = set_nouse_crs,
103 .ident = "Thinkpad SL510",
104 .matches = {
105 DMI_MATCH(DMI_BOARD_VENDOR, "LENOVO"),
106 DMI_MATCH(DMI_BOARD_NAME, "2847DFG"),
107 DMI_MATCH(DMI_BIOS_VERSION, "6JET85WW (1.43 )"),
108 },
109 },
110
111
112 {
113 .callback = set_ignore_seg,
114 .ident = "HP xw9300",
115 .matches = {
116 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
117 DMI_MATCH(DMI_PRODUCT_NAME, "HP xw9300 Workstation"),
118 },
119 },
120 {}
121};
122
123void __init pci_acpi_crs_quirks(void)
124{
125 int year;
126
127 if (dmi_get_date(DMI_BIOS_DATE, &year, NULL, NULL) && year < 2008)
128 pci_use_crs = false;
129
130 dmi_check_system(pci_crs_quirks);
131
132
133
134
135
136 if (pci_probe & PCI_ROOT_NO_CRS)
137 pci_use_crs = false;
138 else if (pci_probe & PCI_USE__CRS)
139 pci_use_crs = true;
140
141 printk(KERN_INFO "PCI: %s host bridge windows from ACPI; "
142 "if necessary, use \"pci=%s\" and report a bug\n",
143 pci_use_crs ? "Using" : "Ignoring",
144 pci_use_crs ? "nocrs" : "use_crs");
145}
146
147#ifdef CONFIG_PCI_MMCONFIG
148static int check_segment(u16 seg, struct device *dev, char *estr)
149{
150 if (seg) {
151 dev_err(dev,
152 "%s can't access PCI configuration "
153 "space under this host bridge.\n",
154 estr);
155 return -EIO;
156 }
157
158
159
160
161
162
163 dev_warn(dev,
164 "%s can't access extended PCI configuration "
165 "space under this bridge.\n",
166 estr);
167
168 return 0;
169}
170
171static int setup_mcfg_map(struct pci_root_info *info, u16 seg, u8 start,
172 u8 end, phys_addr_t addr)
173{
174 int result;
175 struct device *dev = &info->bridge->dev;
176
177 info->start_bus = start;
178 info->end_bus = end;
179 info->mcfg_added = false;
180
181
182 if (raw_pci_ext_ops && raw_pci_ext_ops != &pci_mmcfg)
183 return 0;
184
185 if (!(pci_probe & PCI_PROBE_MMCONF))
186 return check_segment(seg, dev, "MMCONFIG is disabled,");
187
188 result = pci_mmconfig_insert(dev, seg, start, end, addr);
189 if (result == 0) {
190
191 if (raw_pci_ext_ops == NULL)
192 raw_pci_ext_ops = &pci_mmcfg;
193 info->mcfg_added = true;
194 } else if (result != -EEXIST)
195 return check_segment(seg, dev,
196 "fail to add MMCONFIG information,");
197
198 return 0;
199}
200
201static void teardown_mcfg_map(struct pci_root_info *info)
202{
203 if (info->mcfg_added) {
204 pci_mmconfig_delete(info->segment, info->start_bus,
205 info->end_bus);
206 info->mcfg_added = false;
207 }
208}
209#else
210static int setup_mcfg_map(struct pci_root_info *info,
211 u16 seg, u8 start, u8 end,
212 phys_addr_t addr)
213{
214 return 0;
215}
216static void teardown_mcfg_map(struct pci_root_info *info)
217{
218}
219#endif
220
221static acpi_status resource_to_addr(struct acpi_resource *resource,
222 struct acpi_resource_address64 *addr)
223{
224 acpi_status status;
225 struct acpi_resource_memory24 *memory24;
226 struct acpi_resource_memory32 *memory32;
227 struct acpi_resource_fixed_memory32 *fixed_memory32;
228
229 memset(addr, 0, sizeof(*addr));
230 switch (resource->type) {
231 case ACPI_RESOURCE_TYPE_MEMORY24:
232 memory24 = &resource->data.memory24;
233 addr->resource_type = ACPI_MEMORY_RANGE;
234 addr->minimum = memory24->minimum;
235 addr->address_length = memory24->address_length;
236 addr->maximum = addr->minimum + addr->address_length - 1;
237 return AE_OK;
238 case ACPI_RESOURCE_TYPE_MEMORY32:
239 memory32 = &resource->data.memory32;
240 addr->resource_type = ACPI_MEMORY_RANGE;
241 addr->minimum = memory32->minimum;
242 addr->address_length = memory32->address_length;
243 addr->maximum = addr->minimum + addr->address_length - 1;
244 return AE_OK;
245 case ACPI_RESOURCE_TYPE_FIXED_MEMORY32:
246 fixed_memory32 = &resource->data.fixed_memory32;
247 addr->resource_type = ACPI_MEMORY_RANGE;
248 addr->minimum = fixed_memory32->address;
249 addr->address_length = fixed_memory32->address_length;
250 addr->maximum = addr->minimum + addr->address_length - 1;
251 return AE_OK;
252 case ACPI_RESOURCE_TYPE_ADDRESS16:
253 case ACPI_RESOURCE_TYPE_ADDRESS32:
254 case ACPI_RESOURCE_TYPE_ADDRESS64:
255 status = acpi_resource_to_address64(resource, addr);
256 if (ACPI_SUCCESS(status) &&
257 (addr->resource_type == ACPI_MEMORY_RANGE ||
258 addr->resource_type == ACPI_IO_RANGE) &&
259 addr->address_length > 0) {
260 return AE_OK;
261 }
262 break;
263 }
264 return AE_ERROR;
265}
266
267static acpi_status count_resource(struct acpi_resource *acpi_res, void *data)
268{
269 struct pci_root_info *info = data;
270 struct acpi_resource_address64 addr;
271 acpi_status status;
272
273 status = resource_to_addr(acpi_res, &addr);
274 if (ACPI_SUCCESS(status))
275 info->res_num++;
276 return AE_OK;
277}
278
279static acpi_status setup_resource(struct acpi_resource *acpi_res, void *data)
280{
281 struct pci_root_info *info = data;
282 struct resource *res;
283 struct acpi_resource_address64 addr;
284 acpi_status status;
285 unsigned long flags;
286 u64 start, orig_end, end;
287
288 status = resource_to_addr(acpi_res, &addr);
289 if (!ACPI_SUCCESS(status))
290 return AE_OK;
291
292 if (addr.resource_type == ACPI_MEMORY_RANGE) {
293 flags = IORESOURCE_MEM;
294 if (addr.info.mem.caching == ACPI_PREFETCHABLE_MEMORY)
295 flags |= IORESOURCE_PREFETCH;
296 } else if (addr.resource_type == ACPI_IO_RANGE) {
297 flags = IORESOURCE_IO;
298 } else
299 return AE_OK;
300
301 start = addr.minimum + addr.translation_offset;
302 orig_end = end = addr.maximum + addr.translation_offset;
303
304
305 end = min(end, (u64)iomem_resource.end);
306 if (end <= start) {
307 dev_info(&info->bridge->dev,
308 "host bridge window [%#llx-%#llx] "
309 "(ignored, not CPU addressable)\n", start, orig_end);
310 return AE_OK;
311 } else if (orig_end != end) {
312 dev_info(&info->bridge->dev,
313 "host bridge window [%#llx-%#llx] "
314 "([%#llx-%#llx] ignored, not CPU addressable)\n",
315 start, orig_end, end + 1, orig_end);
316 }
317
318 res = &info->res[info->res_num];
319 res->name = info->name;
320 res->flags = flags;
321 res->start = start;
322 res->end = end;
323 info->res_offset[info->res_num] = addr.translation_offset;
324 info->res_num++;
325
326 if (!pci_use_crs)
327 dev_printk(KERN_DEBUG, &info->bridge->dev,
328 "host bridge window %pR (ignored)\n", res);
329
330 return AE_OK;
331}
332
333static void coalesce_windows(struct pci_root_info *info, unsigned long type)
334{
335 int i, j;
336 struct resource *res1, *res2;
337
338 for (i = 0; i < info->res_num; i++) {
339 res1 = &info->res[i];
340 if (!(res1->flags & type))
341 continue;
342
343 for (j = i + 1; j < info->res_num; j++) {
344 res2 = &info->res[j];
345 if (!(res2->flags & type))
346 continue;
347
348
349
350
351
352
353 if (resource_overlaps(res1, res2)) {
354 res2->start = min(res1->start, res2->start);
355 res2->end = max(res1->end, res2->end);
356 dev_info(&info->bridge->dev,
357 "host bridge window expanded to %pR; %pR ignored\n",
358 res2, res1);
359 res1->flags = 0;
360 }
361 }
362 }
363}
364
365static void add_resources(struct pci_root_info *info,
366 struct list_head *resources)
367{
368 int i;
369 struct resource *res, *root, *conflict;
370
371 coalesce_windows(info, IORESOURCE_MEM);
372 coalesce_windows(info, IORESOURCE_IO);
373
374 for (i = 0; i < info->res_num; i++) {
375 res = &info->res[i];
376
377 if (res->flags & IORESOURCE_MEM)
378 root = &iomem_resource;
379 else if (res->flags & IORESOURCE_IO)
380 root = &ioport_resource;
381 else
382 continue;
383
384 conflict = insert_resource_conflict(root, res);
385 if (conflict)
386 dev_info(&info->bridge->dev,
387 "ignoring host bridge window %pR (conflicts with %s %pR)\n",
388 res, conflict->name, conflict);
389 else
390 pci_add_resource_offset(resources, res,
391 info->res_offset[i]);
392 }
393}
394
395static void free_pci_root_info_res(struct pci_root_info *info)
396{
397 kfree(info->res);
398 info->res = NULL;
399 kfree(info->res_offset);
400 info->res_offset = NULL;
401 info->res_num = 0;
402}
403
404static void __release_pci_root_info(struct pci_root_info *info)
405{
406 int i;
407 struct resource *res;
408
409 for (i = 0; i < info->res_num; i++) {
410 res = &info->res[i];
411
412 if (!res->parent)
413 continue;
414
415 if (!(res->flags & (IORESOURCE_MEM | IORESOURCE_IO)))
416 continue;
417
418 release_resource(res);
419 }
420
421 free_pci_root_info_res(info);
422
423 teardown_mcfg_map(info);
424
425 kfree(info);
426}
427
428static void release_pci_root_info(struct pci_host_bridge *bridge)
429{
430 struct pci_root_info *info = bridge->release_data;
431
432 __release_pci_root_info(info);
433}
434
435static void probe_pci_root_info(struct pci_root_info *info,
436 struct acpi_device *device,
437 int busnum, int domain)
438{
439 size_t size;
440
441 sprintf(info->name, "PCI Bus %04x:%02x", domain, busnum);
442 info->bridge = device;
443
444 info->res_num = 0;
445 acpi_walk_resources(device->handle, METHOD_NAME__CRS, count_resource,
446 info);
447 if (!info->res_num)
448 return;
449
450 size = sizeof(*info->res) * info->res_num;
451 info->res = kzalloc_node(size, GFP_KERNEL, info->sd.node);
452 if (!info->res) {
453 info->res_num = 0;
454 return;
455 }
456
457 size = sizeof(*info->res_offset) * info->res_num;
458 info->res_num = 0;
459 info->res_offset = kzalloc_node(size, GFP_KERNEL, info->sd.node);
460 if (!info->res_offset) {
461 kfree(info->res);
462 info->res = NULL;
463 return;
464 }
465
466 acpi_walk_resources(device->handle, METHOD_NAME__CRS, setup_resource,
467 info);
468}
469
470struct pci_bus *pci_acpi_scan_root(struct acpi_pci_root *root)
471{
472 struct acpi_device *device = root->device;
473 struct pci_root_info *info;
474 int domain = root->segment;
475 int busnum = root->secondary.start;
476 LIST_HEAD(resources);
477 struct pci_bus *bus;
478 struct pci_sysdata *sd;
479 int node;
480
481 if (pci_ignore_seg)
482 domain = 0;
483
484 if (domain && !pci_domains_supported) {
485 printk(KERN_WARNING "pci_bus %04x:%02x: "
486 "ignored (multiple domains not supported)\n",
487 domain, busnum);
488 return NULL;
489 }
490
491 node = acpi_get_node(device->handle);
492 if (node == NUMA_NO_NODE) {
493 node = x86_pci_root_bus_node(busnum);
494 if (node != 0 && node != NUMA_NO_NODE)
495 dev_info(&device->dev, FW_BUG "no _PXM; falling back to node %d from hardware (may be inconsistent with ACPI node numbers)\n",
496 node);
497 }
498
499 if (node != NUMA_NO_NODE && !node_online(node))
500 node = NUMA_NO_NODE;
501
502 info = kzalloc_node(sizeof(*info), GFP_KERNEL, node);
503 if (!info) {
504 printk(KERN_WARNING "pci_bus %04x:%02x: "
505 "ignored (out of memory)\n", domain, busnum);
506 return NULL;
507 }
508
509 sd = &info->sd;
510 sd->domain = domain;
511 sd->node = node;
512 sd->companion = device;
513
514 bus = pci_find_bus(domain, busnum);
515 if (bus) {
516
517
518
519
520 memcpy(bus->sysdata, sd, sizeof(*sd));
521 kfree(info);
522 } else {
523 probe_pci_root_info(info, device, busnum, domain);
524
525
526 pci_add_resource(&resources, &root->secondary);
527
528
529
530
531 if (pci_use_crs)
532 add_resources(info, &resources);
533 else {
534 free_pci_root_info_res(info);
535 x86_pci_root_bus_resources(busnum, &resources);
536 }
537
538 if (!setup_mcfg_map(info, domain, (u8)root->secondary.start,
539 (u8)root->secondary.end, root->mcfg_addr))
540 bus = pci_create_root_bus(NULL, busnum, &pci_root_ops,
541 sd, &resources);
542
543 if (bus) {
544 pci_scan_child_bus(bus);
545 pci_set_host_bridge_release(
546 to_pci_host_bridge(bus->bridge),
547 release_pci_root_info, info);
548 } else {
549 pci_free_resource_list(&resources);
550 __release_pci_root_info(info);
551 }
552 }
553
554
555
556
557 if (bus) {
558 struct pci_bus *child;
559 list_for_each_entry(child, &bus->children, node)
560 pcie_bus_configure_settings(child);
561 }
562
563 if (bus && node != NUMA_NO_NODE)
564 dev_printk(KERN_DEBUG, &bus->dev, "on NUMA node %d\n", node);
565
566 return bus;
567}
568
569int pcibios_root_bridge_prepare(struct pci_host_bridge *bridge)
570{
571 struct pci_sysdata *sd = bridge->bus->sysdata;
572
573 ACPI_COMPANION_SET(&bridge->dev, sd->companion);
574 return 0;
575}
576
577int __init pci_acpi_init(void)
578{
579 struct pci_dev *dev = NULL;
580
581 if (acpi_noirq)
582 return -ENODEV;
583
584 printk(KERN_INFO "PCI: Using ACPI for IRQ routing\n");
585 acpi_irq_penalty_init();
586 pcibios_enable_irq = acpi_pci_irq_enable;
587 pcibios_disable_irq = acpi_pci_irq_disable;
588 x86_init.pci.init_irq = x86_init_noop;
589
590 if (pci_routeirq) {
591
592
593
594
595
596 printk(KERN_INFO "PCI: Routing PCI interrupts for all devices because \"pci=routeirq\" specified\n");
597 for_each_pci_dev(dev)
598 acpi_pci_irq_enable(dev);
599 }
600
601 return 0;
602}
603
