Merge tag 'pci-v3.9-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci
[linux-3.10.git] / arch / x86 / pci / acpi.c
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
10 struct 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
25 static bool pci_use_crs = true;
26 static bool pci_ignore_seg = false;
27
28 static int __init set_use_crs(const struct dmi_system_id *id)
29 {
30         pci_use_crs = true;
31         return 0;
32 }
33
34 static int __init set_nouse_crs(const struct dmi_system_id *id)
35 {
36         pci_use_crs = false;
37         return 0;
38 }
39
40 static 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
47 static const struct dmi_system_id pci_crs_quirks[] __initconst = {
48         /* http://bugzilla.kernel.org/show_bug.cgi?id=14183 */
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         /* https://bugzilla.kernel.org/show_bug.cgi?id=16007 */
58         /* 2006 AMD HT/VIA system with two host bridges */
59         {
60                 .callback = set_use_crs,
61                 .ident = "ASRock ALiveSATA2-GLAN",
62                 .matches = {
63                         DMI_MATCH(DMI_PRODUCT_NAME, "ALiveSATA2-GLAN"),
64                 },
65         },
66         /* https://bugzilla.kernel.org/show_bug.cgi?id=30552 */
67         /* 2006 AMD HT/VIA system with two host bridges */
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         /* https://bugzilla.kernel.org/show_bug.cgi?id=42619 */
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         /* Now for the blacklist.. */
89
90         /* https://bugzilla.redhat.com/show_bug.cgi?id=769657 */
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         /* https://bugzilla.redhat.com/show_bug.cgi?id=769657 */
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         /* https://bugzilla.kernel.org/show_bug.cgi?id=15362 */
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
123 void __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          * If the user specifies "pci=use_crs" or "pci=nocrs" explicitly, that
134          * takes precedence over anything we figured out above.
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
148 static 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          * Failure in adding MMCFG information is not fatal,
160          * just can't access extended configuration space of
161          * devices under this host bridge.
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
171 static 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         /* return success if MMCFG is not in use */
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                 /* enable MMCFG if it hasn't been enabled yet */
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
201 static 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
210 static 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 }
216 static void teardown_mcfg_map(struct pci_root_info *info)
217 {
218 }
219 #endif
220
221 static acpi_status
222 resource_to_addr(struct acpi_resource *resource,
223                         struct acpi_resource_address64 *addr)
224 {
225         acpi_status status;
226         struct acpi_resource_memory24 *memory24;
227         struct acpi_resource_memory32 *memory32;
228         struct acpi_resource_fixed_memory32 *fixed_memory32;
229
230         memset(addr, 0, sizeof(*addr));
231         switch (resource->type) {
232         case ACPI_RESOURCE_TYPE_MEMORY24:
233                 memory24 = &resource->data.memory24;
234                 addr->resource_type = ACPI_MEMORY_RANGE;
235                 addr->minimum = memory24->minimum;
236                 addr->address_length = memory24->address_length;
237                 addr->maximum = addr->minimum + addr->address_length - 1;
238                 return AE_OK;
239         case ACPI_RESOURCE_TYPE_MEMORY32:
240                 memory32 = &resource->data.memory32;
241                 addr->resource_type = ACPI_MEMORY_RANGE;
242                 addr->minimum = memory32->minimum;
243                 addr->address_length = memory32->address_length;
244                 addr->maximum = addr->minimum + addr->address_length - 1;
245                 return AE_OK;
246         case ACPI_RESOURCE_TYPE_FIXED_MEMORY32:
247                 fixed_memory32 = &resource->data.fixed_memory32;
248                 addr->resource_type = ACPI_MEMORY_RANGE;
249                 addr->minimum = fixed_memory32->address;
250                 addr->address_length = fixed_memory32->address_length;
251                 addr->maximum = addr->minimum + addr->address_length - 1;
252                 return AE_OK;
253         case ACPI_RESOURCE_TYPE_ADDRESS16:
254         case ACPI_RESOURCE_TYPE_ADDRESS32:
255         case ACPI_RESOURCE_TYPE_ADDRESS64:
256                 status = acpi_resource_to_address64(resource, addr);
257                 if (ACPI_SUCCESS(status) &&
258                     (addr->resource_type == ACPI_MEMORY_RANGE ||
259                     addr->resource_type == ACPI_IO_RANGE) &&
260                     addr->address_length > 0) {
261                         return AE_OK;
262                 }
263                 break;
264         }
265         return AE_ERROR;
266 }
267
268 static acpi_status
269 count_resource(struct acpi_resource *acpi_res, void *data)
270 {
271         struct pci_root_info *info = data;
272         struct acpi_resource_address64 addr;
273         acpi_status status;
274
275         status = resource_to_addr(acpi_res, &addr);
276         if (ACPI_SUCCESS(status))
277                 info->res_num++;
278         return AE_OK;
279 }
280
281 static acpi_status
282 setup_resource(struct acpi_resource *acpi_res, void *data)
283 {
284         struct pci_root_info *info = data;
285         struct resource *res;
286         struct acpi_resource_address64 addr;
287         acpi_status status;
288         unsigned long flags;
289         u64 start, orig_end, end;
290
291         status = resource_to_addr(acpi_res, &addr);
292         if (!ACPI_SUCCESS(status))
293                 return AE_OK;
294
295         if (addr.resource_type == ACPI_MEMORY_RANGE) {
296                 flags = IORESOURCE_MEM;
297                 if (addr.info.mem.caching == ACPI_PREFETCHABLE_MEMORY)
298                         flags |= IORESOURCE_PREFETCH;
299         } else if (addr.resource_type == ACPI_IO_RANGE) {
300                 flags = IORESOURCE_IO;
301         } else
302                 return AE_OK;
303
304         start = addr.minimum + addr.translation_offset;
305         orig_end = end = addr.maximum + addr.translation_offset;
306
307         /* Exclude non-addressable range or non-addressable portion of range */
308         end = min(end, (u64)iomem_resource.end);
309         if (end <= start) {
310                 dev_info(&info->bridge->dev,
311                         "host bridge window [%#llx-%#llx] "
312                         "(ignored, not CPU addressable)\n", start, orig_end);
313                 return AE_OK;
314         } else if (orig_end != end) {
315                 dev_info(&info->bridge->dev,
316                         "host bridge window [%#llx-%#llx] "
317                         "([%#llx-%#llx] ignored, not CPU addressable)\n", 
318                         start, orig_end, end + 1, orig_end);
319         }
320
321         res = &info->res[info->res_num];
322         res->name = info->name;
323         res->flags = flags;
324         res->start = start;
325         res->end = end;
326         info->res_offset[info->res_num] = addr.translation_offset;
327
328         if (!pci_use_crs) {
329                 dev_printk(KERN_DEBUG, &info->bridge->dev,
330                            "host bridge window %pR (ignored)\n", res);
331                 return AE_OK;
332         }
333
334         info->res_num++;
335
336         return AE_OK;
337 }
338
339 static void coalesce_windows(struct pci_root_info *info, unsigned long type)
340 {
341         int i, j;
342         struct resource *res1, *res2;
343
344         for (i = 0; i < info->res_num; i++) {
345                 res1 = &info->res[i];
346                 if (!(res1->flags & type))
347                         continue;
348
349                 for (j = i + 1; j < info->res_num; j++) {
350                         res2 = &info->res[j];
351                         if (!(res2->flags & type))
352                                 continue;
353
354                         /*
355                          * I don't like throwing away windows because then
356                          * our resources no longer match the ACPI _CRS, but
357                          * the kernel resource tree doesn't allow overlaps.
358                          */
359                         if (resource_overlaps(res1, res2)) {
360                                 res1->start = min(res1->start, res2->start);
361                                 res1->end = max(res1->end, res2->end);
362                                 dev_info(&info->bridge->dev,
363                                          "host bridge window expanded to %pR; %pR ignored\n",
364                                          res1, res2);
365                                 res2->flags = 0;
366                         }
367                 }
368         }
369 }
370
371 static void add_resources(struct pci_root_info *info,
372                           struct list_head *resources)
373 {
374         int i;
375         struct resource *res, *root, *conflict;
376
377         coalesce_windows(info, IORESOURCE_MEM);
378         coalesce_windows(info, IORESOURCE_IO);
379
380         for (i = 0; i < info->res_num; i++) {
381                 res = &info->res[i];
382
383                 if (res->flags & IORESOURCE_MEM)
384                         root = &iomem_resource;
385                 else if (res->flags & IORESOURCE_IO)
386                         root = &ioport_resource;
387                 else
388                         continue;
389
390                 conflict = insert_resource_conflict(root, res);
391                 if (conflict)
392                         dev_info(&info->bridge->dev,
393                                  "ignoring host bridge window %pR (conflicts with %s %pR)\n",
394                                  res, conflict->name, conflict);
395                 else
396                         pci_add_resource_offset(resources, res,
397                                         info->res_offset[i]);
398         }
399 }
400
401 static void free_pci_root_info_res(struct pci_root_info *info)
402 {
403         kfree(info->res);
404         info->res = NULL;
405         kfree(info->res_offset);
406         info->res_offset = NULL;
407         info->res_num = 0;
408 }
409
410 static void __release_pci_root_info(struct pci_root_info *info)
411 {
412         int i;
413         struct resource *res;
414
415         for (i = 0; i < info->res_num; i++) {
416                 res = &info->res[i];
417
418                 if (!res->parent)
419                         continue;
420
421                 if (!(res->flags & (IORESOURCE_MEM | IORESOURCE_IO)))
422                         continue;
423
424                 release_resource(res);
425         }
426
427         free_pci_root_info_res(info);
428
429         teardown_mcfg_map(info);
430
431         kfree(info);
432 }
433
434 static void release_pci_root_info(struct pci_host_bridge *bridge)
435 {
436         struct pci_root_info *info = bridge->release_data;
437
438         __release_pci_root_info(info);
439 }
440
441 static void
442 probe_pci_root_info(struct pci_root_info *info, struct acpi_device *device,
443                     int busnum, int domain)
444 {
445         size_t size;
446
447         sprintf(info->name, "PCI Bus %04x:%02x", domain, busnum);
448         info->bridge = device;
449
450         info->res_num = 0;
451         acpi_walk_resources(device->handle, METHOD_NAME__CRS, count_resource,
452                                 info);
453         if (!info->res_num)
454                 return;
455
456         size = sizeof(*info->res) * info->res_num;
457         info->res = kzalloc(size, GFP_KERNEL);
458         if (!info->res) {
459                 info->res_num = 0;
460                 return;
461         }
462
463         size = sizeof(*info->res_offset) * info->res_num;
464         info->res_num = 0;
465         info->res_offset = kzalloc(size, GFP_KERNEL);
466         if (!info->res_offset) {
467                 kfree(info->res);
468                 info->res = NULL;
469                 return;
470         }
471
472         acpi_walk_resources(device->handle, METHOD_NAME__CRS, setup_resource,
473                                 info);
474 }
475
476 struct pci_bus *pci_acpi_scan_root(struct acpi_pci_root *root)
477 {
478         struct acpi_device *device = root->device;
479         struct pci_root_info *info = NULL;
480         int domain = root->segment;
481         int busnum = root->secondary.start;
482         LIST_HEAD(resources);
483         struct pci_bus *bus = NULL;
484         struct pci_sysdata *sd;
485         int node;
486 #ifdef CONFIG_ACPI_NUMA
487         int pxm;
488 #endif
489
490         if (pci_ignore_seg)
491                 domain = 0;
492
493         if (domain && !pci_domains_supported) {
494                 printk(KERN_WARNING "pci_bus %04x:%02x: "
495                        "ignored (multiple domains not supported)\n",
496                        domain, busnum);
497                 return NULL;
498         }
499
500         node = -1;
501 #ifdef CONFIG_ACPI_NUMA
502         pxm = acpi_get_pxm(device->handle);
503         if (pxm >= 0)
504                 node = pxm_to_node(pxm);
505         if (node != -1)
506                 set_mp_bus_to_node(busnum, node);
507         else
508 #endif
509                 node = get_mp_bus_to_node(busnum);
510
511         if (node != -1 && !node_online(node))
512                 node = -1;
513
514         info = kzalloc(sizeof(*info), GFP_KERNEL);
515         if (!info) {
516                 printk(KERN_WARNING "pci_bus %04x:%02x: "
517                        "ignored (out of memory)\n", domain, busnum);
518                 return NULL;
519         }
520
521         sd = &info->sd;
522         sd->domain = domain;
523         sd->node = node;
524         sd->acpi = device->handle;
525         /*
526          * Maybe the desired pci bus has been already scanned. In such case
527          * it is unnecessary to scan the pci bus with the given domain,busnum.
528          */
529         bus = pci_find_bus(domain, busnum);
530         if (bus) {
531                 /*
532                  * If the desired bus exits, the content of bus->sysdata will
533                  * be replaced by sd.
534                  */
535                 memcpy(bus->sysdata, sd, sizeof(*sd));
536                 kfree(info);
537         } else {
538                 probe_pci_root_info(info, device, busnum, domain);
539
540                 /* insert busn res at first */
541                 pci_add_resource(&resources,  &root->secondary);
542                 /*
543                  * _CRS with no apertures is normal, so only fall back to
544                  * defaults or native bridge info if we're ignoring _CRS.
545                  */
546                 if (pci_use_crs)
547                         add_resources(info, &resources);
548                 else {
549                         free_pci_root_info_res(info);
550                         x86_pci_root_bus_resources(busnum, &resources);
551                 }
552
553                 if (!setup_mcfg_map(info, domain, (u8)root->secondary.start,
554                                     (u8)root->secondary.end, root->mcfg_addr))
555                         bus = pci_create_root_bus(NULL, busnum, &pci_root_ops,
556                                                   sd, &resources);
557
558                 if (bus) {
559                         pci_scan_child_bus(bus);
560                         pci_set_host_bridge_release(
561                                 to_pci_host_bridge(bus->bridge),
562                                 release_pci_root_info, info);
563                 } else {
564                         pci_free_resource_list(&resources);
565                         __release_pci_root_info(info);
566                 }
567         }
568
569         /* After the PCI-E bus has been walked and all devices discovered,
570          * configure any settings of the fabric that might be necessary.
571          */
572         if (bus) {
573                 struct pci_bus *child;
574                 list_for_each_entry(child, &bus->children, node) {
575                         struct pci_dev *self = child->self;
576                         if (!self)
577                                 continue;
578
579                         pcie_bus_configure_settings(child, self->pcie_mpss);
580                 }
581         }
582
583         if (bus && node != -1) {
584 #ifdef CONFIG_ACPI_NUMA
585                 if (pxm >= 0)
586                         dev_printk(KERN_DEBUG, &bus->dev,
587                                    "on NUMA node %d (pxm %d)\n", node, pxm);
588 #else
589                 dev_printk(KERN_DEBUG, &bus->dev, "on NUMA node %d\n", node);
590 #endif
591         }
592
593         return bus;
594 }
595
596 int pcibios_root_bridge_prepare(struct pci_host_bridge *bridge)
597 {
598         struct pci_sysdata *sd = bridge->bus->sysdata;
599
600         ACPI_HANDLE_SET(&bridge->dev, sd->acpi);
601         return 0;
602 }
603
604 int __init pci_acpi_init(void)
605 {
606         struct pci_dev *dev = NULL;
607
608         if (acpi_noirq)
609                 return -ENODEV;
610
611         printk(KERN_INFO "PCI: Using ACPI for IRQ routing\n");
612         acpi_irq_penalty_init();
613         pcibios_enable_irq = acpi_pci_irq_enable;
614         pcibios_disable_irq = acpi_pci_irq_disable;
615         x86_init.pci.init_irq = x86_init_noop;
616
617         if (pci_routeirq) {
618                 /*
619                  * PCI IRQ routing is set up by pci_enable_device(), but we
620                  * also do it here in case there are still broken drivers that
621                  * don't use pci_enable_device().
622                  */
623                 printk(KERN_INFO "PCI: Routing PCI interrupts for all devices because \"pci=routeirq\" specified\n");
624                 for_each_pci_dev(dev)
625                         acpi_pci_irq_enable(dev);
626         }
627
628         return 0;
629 }