Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | #include <linux/pci.h> |
2 | #include <linux/acpi.h> | |
3 | #include <linux/init.h> | |
b33fa1f3 | 4 | #include <linux/irq.h> |
036fff4c | 5 | #include <linux/dmi.h> |
5a0e3ad6 | 6 | #include <linux/slab.h> |
4d6b4e69 | 7 | #include <linux/pci-acpi.h> |
69e1a33f | 8 | #include <asm/numa.h> |
82487711 | 9 | #include <asm/pci_x86.h> |
1da177e4 | 10 | |
62f420f8 | 11 | struct pci_root_info { |
4d6b4e69 | 12 | struct acpi_pci_root_info common; |
35cb05e5 | 13 | struct pci_sysdata sd; |
c0fa4078 JL |
14 | #ifdef CONFIG_PCI_MMCONFIG |
15 | bool mcfg_added; | |
c0fa4078 JL |
16 | u8 start_bus; |
17 | u8 end_bus; | |
18 | #endif | |
62f420f8 GH |
19 | }; |
20 | ||
7bc5e3f2 | 21 | static bool pci_use_crs = true; |
1f09b09b | 22 | static bool pci_ignore_seg = false; |
7bc5e3f2 BH |
23 | |
24 | static int __init set_use_crs(const struct dmi_system_id *id) | |
25 | { | |
26 | pci_use_crs = true; | |
27 | return 0; | |
28 | } | |
29 | ||
28c3c05d DJ |
30 | static int __init set_nouse_crs(const struct dmi_system_id *id) |
31 | { | |
32 | pci_use_crs = false; | |
33 | return 0; | |
34 | } | |
35 | ||
1f09b09b BH |
36 | static int __init set_ignore_seg(const struct dmi_system_id *id) |
37 | { | |
38 | printk(KERN_INFO "PCI: %s detected: ignoring ACPI _SEG\n", id->ident); | |
39 | pci_ignore_seg = true; | |
40 | return 0; | |
41 | } | |
42 | ||
43 | static const struct dmi_system_id pci_crs_quirks[] __initconst = { | |
7bc5e3f2 BH |
44 | /* http://bugzilla.kernel.org/show_bug.cgi?id=14183 */ |
45 | { | |
46 | .callback = set_use_crs, | |
47 | .ident = "IBM System x3800", | |
48 | .matches = { | |
49 | DMI_MATCH(DMI_SYS_VENDOR, "IBM"), | |
50 | DMI_MATCH(DMI_PRODUCT_NAME, "x3800"), | |
51 | }, | |
52 | }, | |
2491762c BH |
53 | /* https://bugzilla.kernel.org/show_bug.cgi?id=16007 */ |
54 | /* 2006 AMD HT/VIA system with two host bridges */ | |
55 | { | |
56 | .callback = set_use_crs, | |
57 | .ident = "ASRock ALiveSATA2-GLAN", | |
58 | .matches = { | |
59 | DMI_MATCH(DMI_PRODUCT_NAME, "ALiveSATA2-GLAN"), | |
60 | }, | |
61 | }, | |
29cf7a30 PM |
62 | /* https://bugzilla.kernel.org/show_bug.cgi?id=30552 */ |
63 | /* 2006 AMD HT/VIA system with two host bridges */ | |
64 | { | |
65 | .callback = set_use_crs, | |
66 | .ident = "ASUS M2V-MX SE", | |
67 | .matches = { | |
68 | DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."), | |
69 | DMI_MATCH(DMI_BOARD_NAME, "M2V-MX SE"), | |
70 | DMI_MATCH(DMI_BIOS_VENDOR, "American Megatrends Inc."), | |
71 | }, | |
72 | }, | |
84113717 JN |
73 | /* https://bugzilla.kernel.org/show_bug.cgi?id=42619 */ |
74 | { | |
75 | .callback = set_use_crs, | |
76 | .ident = "MSI MS-7253", | |
77 | .matches = { | |
78 | DMI_MATCH(DMI_BOARD_VENDOR, "MICRO-STAR INTERNATIONAL CO., LTD"), | |
79 | DMI_MATCH(DMI_BOARD_NAME, "MS-7253"), | |
80 | DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies, LTD"), | |
84113717 JN |
81 | }, |
82 | }, | |
1dace011 BH |
83 | /* https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/931368 */ |
84 | /* https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1033299 */ | |
85 | { | |
86 | .callback = set_use_crs, | |
87 | .ident = "Foxconn K8M890-8237A", | |
88 | .matches = { | |
89 | DMI_MATCH(DMI_BOARD_VENDOR, "Foxconn"), | |
90 | DMI_MATCH(DMI_BOARD_NAME, "K8M890-8237A"), | |
91 | DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies, LTD"), | |
92 | }, | |
93 | }, | |
28c3c05d | 94 | |
e702781f DJ |
95 | /* Now for the blacklist.. */ |
96 | ||
97 | /* https://bugzilla.redhat.com/show_bug.cgi?id=769657 */ | |
98 | { | |
99 | .callback = set_nouse_crs, | |
100 | .ident = "Dell Studio 1557", | |
101 | .matches = { | |
102 | DMI_MATCH(DMI_BOARD_VENDOR, "Dell Inc."), | |
103 | DMI_MATCH(DMI_PRODUCT_NAME, "Studio 1557"), | |
104 | DMI_MATCH(DMI_BIOS_VERSION, "A09"), | |
105 | }, | |
106 | }, | |
8b6a5af9 DJ |
107 | /* https://bugzilla.redhat.com/show_bug.cgi?id=769657 */ |
108 | { | |
109 | .callback = set_nouse_crs, | |
110 | .ident = "Thinkpad SL510", | |
111 | .matches = { | |
112 | DMI_MATCH(DMI_BOARD_VENDOR, "LENOVO"), | |
113 | DMI_MATCH(DMI_BOARD_NAME, "2847DFG"), | |
114 | DMI_MATCH(DMI_BIOS_VERSION, "6JET85WW (1.43 )"), | |
115 | }, | |
116 | }, | |
1f09b09b BH |
117 | |
118 | /* https://bugzilla.kernel.org/show_bug.cgi?id=15362 */ | |
119 | { | |
120 | .callback = set_ignore_seg, | |
121 | .ident = "HP xw9300", | |
122 | .matches = { | |
123 | DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), | |
124 | DMI_MATCH(DMI_PRODUCT_NAME, "HP xw9300 Workstation"), | |
125 | }, | |
126 | }, | |
7bc5e3f2 BH |
127 | {} |
128 | }; | |
129 | ||
130 | void __init pci_acpi_crs_quirks(void) | |
131 | { | |
132 | int year; | |
133 | ||
3d9fecf6 BH |
134 | if (dmi_get_date(DMI_BIOS_DATE, &year, NULL, NULL) && year < 2008) { |
135 | if (iomem_resource.end <= 0xffffffff) | |
136 | pci_use_crs = false; | |
137 | } | |
7bc5e3f2 | 138 | |
1f09b09b | 139 | dmi_check_system(pci_crs_quirks); |
7bc5e3f2 BH |
140 | |
141 | /* | |
142 | * If the user specifies "pci=use_crs" or "pci=nocrs" explicitly, that | |
143 | * takes precedence over anything we figured out above. | |
144 | */ | |
145 | if (pci_probe & PCI_ROOT_NO_CRS) | |
146 | pci_use_crs = false; | |
147 | else if (pci_probe & PCI_USE__CRS) | |
148 | pci_use_crs = true; | |
149 | ||
150 | printk(KERN_INFO "PCI: %s host bridge windows from ACPI; " | |
151 | "if necessary, use \"pci=%s\" and report a bug\n", | |
152 | pci_use_crs ? "Using" : "Ignoring", | |
153 | pci_use_crs ? "nocrs" : "use_crs"); | |
154 | } | |
155 | ||
c0fa4078 | 156 | #ifdef CONFIG_PCI_MMCONFIG |
a18e3690 | 157 | static int check_segment(u16 seg, struct device *dev, char *estr) |
c0fa4078 JL |
158 | { |
159 | if (seg) { | |
160 | dev_err(dev, | |
161 | "%s can't access PCI configuration " | |
162 | "space under this host bridge.\n", | |
163 | estr); | |
164 | return -EIO; | |
165 | } | |
166 | ||
167 | /* | |
168 | * Failure in adding MMCFG information is not fatal, | |
169 | * just can't access extended configuration space of | |
170 | * devices under this host bridge. | |
171 | */ | |
172 | dev_warn(dev, | |
173 | "%s can't access extended PCI configuration " | |
174 | "space under this bridge.\n", | |
175 | estr); | |
176 | ||
177 | return 0; | |
178 | } | |
179 | ||
4d6b4e69 | 180 | static int setup_mcfg_map(struct acpi_pci_root_info *ci) |
c0fa4078 | 181 | { |
4d6b4e69 JL |
182 | int result, seg; |
183 | struct pci_root_info *info; | |
184 | struct acpi_pci_root *root = ci->root; | |
185 | struct device *dev = &ci->bridge->dev; | |
c0fa4078 | 186 | |
4d6b4e69 JL |
187 | info = container_of(ci, struct pci_root_info, common); |
188 | info->start_bus = (u8)root->secondary.start; | |
189 | info->end_bus = (u8)root->secondary.end; | |
c0fa4078 | 190 | info->mcfg_added = false; |
4d6b4e69 | 191 | seg = info->sd.domain; |
c0fa4078 JL |
192 | |
193 | /* return success if MMCFG is not in use */ | |
194 | if (raw_pci_ext_ops && raw_pci_ext_ops != &pci_mmcfg) | |
195 | return 0; | |
196 | ||
197 | if (!(pci_probe & PCI_PROBE_MMCONF)) | |
198 | return check_segment(seg, dev, "MMCONFIG is disabled,"); | |
199 | ||
4d6b4e69 JL |
200 | result = pci_mmconfig_insert(dev, seg, info->start_bus, info->end_bus, |
201 | root->mcfg_addr); | |
c0fa4078 JL |
202 | if (result == 0) { |
203 | /* enable MMCFG if it hasn't been enabled yet */ | |
204 | if (raw_pci_ext_ops == NULL) | |
205 | raw_pci_ext_ops = &pci_mmcfg; | |
206 | info->mcfg_added = true; | |
207 | } else if (result != -EEXIST) | |
208 | return check_segment(seg, dev, | |
209 | "fail to add MMCONFIG information,"); | |
210 | ||
211 | return 0; | |
212 | } | |
213 | ||
4d6b4e69 | 214 | static void teardown_mcfg_map(struct acpi_pci_root_info *ci) |
c0fa4078 | 215 | { |
4d6b4e69 JL |
216 | struct pci_root_info *info; |
217 | ||
218 | info = container_of(ci, struct pci_root_info, common); | |
c0fa4078 | 219 | if (info->mcfg_added) { |
4d6b4e69 JL |
220 | pci_mmconfig_delete(info->sd.domain, |
221 | info->start_bus, info->end_bus); | |
c0fa4078 JL |
222 | info->mcfg_added = false; |
223 | } | |
224 | } | |
225 | #else | |
4d6b4e69 | 226 | static int setup_mcfg_map(struct acpi_pci_root_info *ci) |
c0fa4078 JL |
227 | { |
228 | return 0; | |
229 | } | |
4d6b4e69 JL |
230 | |
231 | static void teardown_mcfg_map(struct acpi_pci_root_info *ci) | |
c0fa4078 JL |
232 | { |
233 | } | |
234 | #endif | |
235 | ||
4d6b4e69 | 236 | static int pci_acpi_root_get_node(struct acpi_pci_root *root) |
62f420f8 | 237 | { |
4d6b4e69 JL |
238 | int busnum = root->secondary.start; |
239 | struct acpi_device *device = root->device; | |
240 | int node = acpi_get_node(device->handle); | |
593669c2 | 241 | |
4d6b4e69 JL |
242 | if (node == NUMA_NO_NODE) { |
243 | node = x86_pci_root_bus_node(busnum); | |
244 | if (node != 0 && node != NUMA_NO_NODE) | |
245 | dev_info(&device->dev, FW_BUG "no _PXM; falling back to node %d from hardware (may be inconsistent with ACPI node numbers)\n", | |
246 | node); | |
4723d0f2 | 247 | } |
4d6b4e69 JL |
248 | if (node != NUMA_NO_NODE && !node_online(node)) |
249 | node = NUMA_NO_NODE; | |
250 | ||
251 | return node; | |
4723d0f2 BH |
252 | } |
253 | ||
4d6b4e69 | 254 | static int pci_acpi_root_init_info(struct acpi_pci_root_info *ci) |
4723d0f2 | 255 | { |
4d6b4e69 | 256 | return setup_mcfg_map(ci); |
fd3b0c1e YL |
257 | } |
258 | ||
4d6b4e69 | 259 | static void pci_acpi_root_release_info(struct acpi_pci_root_info *ci) |
fd3b0c1e | 260 | { |
4d6b4e69 JL |
261 | teardown_mcfg_map(ci); |
262 | kfree(container_of(ci, struct pci_root_info, common)); | |
fd3b0c1e | 263 | } |
c0fa4078 | 264 | |
2c62e849 JL |
265 | /* |
266 | * An IO port or MMIO resource assigned to a PCI host bridge may be | |
267 | * consumed by the host bridge itself or available to its child | |
268 | * bus/devices. The ACPI specification defines a bit (Producer/Consumer) | |
269 | * to tell whether the resource is consumed by the host bridge itself, | |
270 | * but firmware hasn't used that bit consistently, so we can't rely on it. | |
271 | * | |
272 | * On x86 and IA64 platforms, all IO port and MMIO resources are assumed | |
273 | * to be available to child bus/devices except one special case: | |
274 | * IO port [0xCF8-0xCFF] is consumed by the host bridge itself | |
275 | * to access PCI configuration space. | |
276 | * | |
277 | * So explicitly filter out PCI CFG IO ports[0xCF8-0xCFF]. | |
278 | */ | |
279 | static bool resource_is_pcicfg_ioport(struct resource *res) | |
280 | { | |
281 | return (res->flags & IORESOURCE_IO) && | |
282 | res->start == 0xCF8 && res->end == 0xCFF; | |
283 | } | |
284 | ||
4d6b4e69 | 285 | static int pci_acpi_root_prepare_resources(struct acpi_pci_root_info *ci) |
62f420f8 | 286 | { |
4d6b4e69 JL |
287 | struct acpi_device *device = ci->bridge; |
288 | int busnum = ci->root->secondary.start; | |
63f1789e | 289 | struct resource_entry *entry, *tmp; |
4d6b4e69 | 290 | int status; |
62f420f8 | 291 | |
4d6b4e69 JL |
292 | status = acpi_pci_probe_root_resources(ci); |
293 | if (pci_use_crs) { | |
294 | resource_list_for_each_entry_safe(entry, tmp, &ci->resources) | |
295 | if (resource_is_pcicfg_ioport(entry->res)) | |
63f1789e | 296 | resource_list_destroy_entry(entry); |
4d6b4e69 JL |
297 | return status; |
298 | } | |
299 | ||
300 | resource_list_for_each_entry_safe(entry, tmp, &ci->resources) { | |
301 | dev_printk(KERN_DEBUG, &device->dev, | |
302 | "host bridge window %pR (ignored)\n", entry->res); | |
303 | resource_list_destroy_entry(entry); | |
304 | } | |
305 | x86_pci_root_bus_resources(busnum, &ci->resources); | |
306 | ||
307 | return 0; | |
62f420f8 GH |
308 | } |
309 | ||
4d6b4e69 JL |
310 | static struct acpi_pci_root_ops acpi_pci_root_ops = { |
311 | .pci_ops = &pci_root_ops, | |
312 | .init_info = pci_acpi_root_init_info, | |
313 | .release_info = pci_acpi_root_release_info, | |
314 | .prepare_resources = pci_acpi_root_prepare_resources, | |
315 | }; | |
316 | ||
a18e3690 | 317 | struct pci_bus *pci_acpi_scan_root(struct acpi_pci_root *root) |
1da177e4 | 318 | { |
57283776 BH |
319 | int domain = root->segment; |
320 | int busnum = root->secondary.start; | |
4d6b4e69 | 321 | int node = pci_acpi_root_get_node(root); |
8928d5a6 | 322 | struct pci_bus *bus; |
08f1c192 | 323 | |
1f09b09b | 324 | if (pci_ignore_seg) |
a3669868 | 325 | root->segment = domain = 0; |
1f09b09b | 326 | |
a79e4198 | 327 | if (domain && !pci_domains_supported) { |
2a6bed83 BH |
328 | printk(KERN_WARNING "pci_bus %04x:%02x: " |
329 | "ignored (multiple domains not supported)\n", | |
330 | domain, busnum); | |
a79e4198 JG |
331 | return NULL; |
332 | } | |
333 | ||
b87e81e5 | 334 | bus = pci_find_bus(domain, busnum); |
335 | if (bus) { | |
336 | /* | |
affbda86 BH |
337 | * If the desired bus has been scanned already, replace |
338 | * its bus->sysdata. | |
b87e81e5 | 339 | */ |
4d6b4e69 JL |
340 | struct pci_sysdata sd = { |
341 | .domain = domain, | |
342 | .node = node, | |
343 | .companion = root->device | |
344 | }; | |
593669c2 | 345 | |
4d6b4e69 JL |
346 | memcpy(bus->sysdata, &sd, sizeof(sd)); |
347 | } else { | |
348 | struct pci_root_info *info; | |
349 | ||
350 | info = kzalloc_node(sizeof(*info), GFP_KERNEL, node); | |
351 | if (!info) | |
352 | dev_err(&root->device->dev, | |
353 | "pci_bus %04x:%02x: ignored (out of memory)\n", | |
354 | domain, busnum); | |
355 | else { | |
356 | info->sd.domain = domain; | |
357 | info->sd.node = node; | |
358 | info->sd.companion = root->device; | |
359 | bus = acpi_pci_root_create(root, &acpi_pci_root_ops, | |
360 | &info->common, &info->sd); | |
fd3b0c1e | 361 | } |
626fdfec | 362 | } |
08f1c192 | 363 | |
b03e7495 JM |
364 | /* After the PCI-E bus has been walked and all devices discovered, |
365 | * configure any settings of the fabric that might be necessary. | |
366 | */ | |
367 | if (bus) { | |
368 | struct pci_bus *child; | |
a58674ff BH |
369 | list_for_each_entry(child, &bus->children, node) |
370 | pcie_bus_configure_settings(child); | |
b03e7495 JM |
371 | } |
372 | ||
69e1a33f | 373 | return bus; |
1da177e4 LT |
374 | } |
375 | ||
6c0cc950 RW |
376 | int pcibios_root_bridge_prepare(struct pci_host_bridge *bridge) |
377 | { | |
dc4fdaf0 RW |
378 | /* |
379 | * We pass NULL as parent to pci_create_root_bus(), so if it is not NULL | |
380 | * here, pci_create_root_bus() has been called by someone else and | |
381 | * sysdata is likely to be different from what we expect. Let it go in | |
382 | * that case. | |
383 | */ | |
384 | if (!bridge->dev.parent) { | |
385 | struct pci_sysdata *sd = bridge->bus->sysdata; | |
386 | ACPI_COMPANION_SET(&bridge->dev, sd->companion); | |
387 | } | |
6c0cc950 RW |
388 | return 0; |
389 | } | |
390 | ||
8dd779b1 | 391 | int __init pci_acpi_init(void) |
1da177e4 LT |
392 | { |
393 | struct pci_dev *dev = NULL; | |
394 | ||
1da177e4 | 395 | if (acpi_noirq) |
b72d0db9 | 396 | return -ENODEV; |
1da177e4 LT |
397 | |
398 | printk(KERN_INFO "PCI: Using ACPI for IRQ routing\n"); | |
399 | acpi_irq_penalty_init(); | |
1da177e4 | 400 | pcibios_enable_irq = acpi_pci_irq_enable; |
87bec66b | 401 | pcibios_disable_irq = acpi_pci_irq_disable; |
ab3b3793 | 402 | x86_init.pci.init_irq = x86_init_noop; |
1da177e4 LT |
403 | |
404 | if (pci_routeirq) { | |
405 | /* | |
406 | * PCI IRQ routing is set up by pci_enable_device(), but we | |
407 | * also do it here in case there are still broken drivers that | |
408 | * don't use pci_enable_device(). | |
409 | */ | |
410 | printk(KERN_INFO "PCI: Routing PCI interrupts for all devices because \"pci=routeirq\" specified\n"); | |
fb37fb96 | 411 | for_each_pci_dev(dev) |
1da177e4 | 412 | acpi_pci_irq_enable(dev); |
657472e9 | 413 | } |
1da177e4 | 414 | |
1da177e4 LT |
415 | return 0; |
416 | } |