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Commit | Line | Data |
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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
1da177e4 LT |
2 | #include <linux/pci.h> |
3 | #include <linux/acpi.h> | |
4 | #include <linux/init.h> | |
b33fa1f3 | 5 | #include <linux/irq.h> |
036fff4c | 6 | #include <linux/dmi.h> |
5a0e3ad6 | 7 | #include <linux/slab.h> |
4d6b4e69 | 8 | #include <linux/pci-acpi.h> |
69e1a33f | 9 | #include <asm/numa.h> |
82487711 | 10 | #include <asm/pci_x86.h> |
1da177e4 | 11 | |
62f420f8 | 12 | struct pci_root_info { |
4d6b4e69 | 13 | struct acpi_pci_root_info common; |
35cb05e5 | 14 | struct pci_sysdata sd; |
c0fa4078 JL |
15 | #ifdef CONFIG_PCI_MMCONFIG |
16 | bool mcfg_added; | |
c0fa4078 JL |
17 | u8 start_bus; |
18 | u8 end_bus; | |
19 | #endif | |
62f420f8 GH |
20 | }; |
21 | ||
7bc5e3f2 | 22 | static bool pci_use_crs = true; |
1f09b09b | 23 | static bool pci_ignore_seg = false; |
7bc5e3f2 BH |
24 | |
25 | static int __init set_use_crs(const struct dmi_system_id *id) | |
26 | { | |
27 | pci_use_crs = true; | |
28 | return 0; | |
29 | } | |
30 | ||
28c3c05d DJ |
31 | static int __init set_nouse_crs(const struct dmi_system_id *id) |
32 | { | |
33 | pci_use_crs = false; | |
34 | return 0; | |
35 | } | |
36 | ||
1f09b09b BH |
37 | static int __init set_ignore_seg(const struct dmi_system_id *id) |
38 | { | |
39 | printk(KERN_INFO "PCI: %s detected: ignoring ACPI _SEG\n", id->ident); | |
40 | pci_ignore_seg = true; | |
41 | return 0; | |
42 | } | |
43 | ||
44 | static const struct dmi_system_id pci_crs_quirks[] __initconst = { | |
7bc5e3f2 BH |
45 | /* http://bugzilla.kernel.org/show_bug.cgi?id=14183 */ |
46 | { | |
47 | .callback = set_use_crs, | |
48 | .ident = "IBM System x3800", | |
49 | .matches = { | |
50 | DMI_MATCH(DMI_SYS_VENDOR, "IBM"), | |
51 | DMI_MATCH(DMI_PRODUCT_NAME, "x3800"), | |
52 | }, | |
53 | }, | |
2491762c BH |
54 | /* https://bugzilla.kernel.org/show_bug.cgi?id=16007 */ |
55 | /* 2006 AMD HT/VIA system with two host bridges */ | |
56 | { | |
57 | .callback = set_use_crs, | |
58 | .ident = "ASRock ALiveSATA2-GLAN", | |
59 | .matches = { | |
60 | DMI_MATCH(DMI_PRODUCT_NAME, "ALiveSATA2-GLAN"), | |
61 | }, | |
62 | }, | |
29cf7a30 PM |
63 | /* https://bugzilla.kernel.org/show_bug.cgi?id=30552 */ |
64 | /* 2006 AMD HT/VIA system with two host bridges */ | |
65 | { | |
66 | .callback = set_use_crs, | |
67 | .ident = "ASUS M2V-MX SE", | |
68 | .matches = { | |
69 | DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."), | |
70 | DMI_MATCH(DMI_BOARD_NAME, "M2V-MX SE"), | |
71 | DMI_MATCH(DMI_BIOS_VENDOR, "American Megatrends Inc."), | |
72 | }, | |
73 | }, | |
84113717 JN |
74 | /* https://bugzilla.kernel.org/show_bug.cgi?id=42619 */ |
75 | { | |
76 | .callback = set_use_crs, | |
77 | .ident = "MSI MS-7253", | |
78 | .matches = { | |
79 | DMI_MATCH(DMI_BOARD_VENDOR, "MICRO-STAR INTERNATIONAL CO., LTD"), | |
80 | DMI_MATCH(DMI_BOARD_NAME, "MS-7253"), | |
81 | DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies, LTD"), | |
84113717 JN |
82 | }, |
83 | }, | |
1dace011 BH |
84 | /* https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/931368 */ |
85 | /* https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1033299 */ | |
86 | { | |
87 | .callback = set_use_crs, | |
88 | .ident = "Foxconn K8M890-8237A", | |
89 | .matches = { | |
90 | DMI_MATCH(DMI_BOARD_VENDOR, "Foxconn"), | |
91 | DMI_MATCH(DMI_BOARD_NAME, "K8M890-8237A"), | |
92 | DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies, LTD"), | |
93 | }, | |
94 | }, | |
28c3c05d | 95 | |
e702781f DJ |
96 | /* Now for the blacklist.. */ |
97 | ||
98 | /* https://bugzilla.redhat.com/show_bug.cgi?id=769657 */ | |
99 | { | |
100 | .callback = set_nouse_crs, | |
101 | .ident = "Dell Studio 1557", | |
102 | .matches = { | |
103 | DMI_MATCH(DMI_BOARD_VENDOR, "Dell Inc."), | |
104 | DMI_MATCH(DMI_PRODUCT_NAME, "Studio 1557"), | |
105 | DMI_MATCH(DMI_BIOS_VERSION, "A09"), | |
106 | }, | |
107 | }, | |
8b6a5af9 DJ |
108 | /* https://bugzilla.redhat.com/show_bug.cgi?id=769657 */ |
109 | { | |
110 | .callback = set_nouse_crs, | |
111 | .ident = "Thinkpad SL510", | |
112 | .matches = { | |
113 | DMI_MATCH(DMI_BOARD_VENDOR, "LENOVO"), | |
114 | DMI_MATCH(DMI_BOARD_NAME, "2847DFG"), | |
115 | DMI_MATCH(DMI_BIOS_VERSION, "6JET85WW (1.43 )"), | |
116 | }, | |
117 | }, | |
89e9f7bc BH |
118 | /* https://bugzilla.kernel.org/show_bug.cgi?id=42606 */ |
119 | { | |
120 | .callback = set_nouse_crs, | |
121 | .ident = "Supermicro X8DTH", | |
122 | .matches = { | |
123 | DMI_MATCH(DMI_SYS_VENDOR, "Supermicro"), | |
124 | DMI_MATCH(DMI_PRODUCT_NAME, "X8DTH-i/6/iF/6F"), | |
125 | DMI_MATCH(DMI_BIOS_VERSION, "2.0a"), | |
126 | }, | |
127 | }, | |
1f09b09b BH |
128 | |
129 | /* https://bugzilla.kernel.org/show_bug.cgi?id=15362 */ | |
130 | { | |
131 | .callback = set_ignore_seg, | |
132 | .ident = "HP xw9300", | |
133 | .matches = { | |
134 | DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), | |
135 | DMI_MATCH(DMI_PRODUCT_NAME, "HP xw9300 Workstation"), | |
136 | }, | |
137 | }, | |
7bc5e3f2 BH |
138 | {} |
139 | }; | |
140 | ||
141 | void __init pci_acpi_crs_quirks(void) | |
142 | { | |
143 | int year; | |
144 | ||
3d9fecf6 BH |
145 | if (dmi_get_date(DMI_BIOS_DATE, &year, NULL, NULL) && year < 2008) { |
146 | if (iomem_resource.end <= 0xffffffff) | |
147 | pci_use_crs = false; | |
148 | } | |
7bc5e3f2 | 149 | |
1f09b09b | 150 | dmi_check_system(pci_crs_quirks); |
7bc5e3f2 BH |
151 | |
152 | /* | |
153 | * If the user specifies "pci=use_crs" or "pci=nocrs" explicitly, that | |
154 | * takes precedence over anything we figured out above. | |
155 | */ | |
156 | if (pci_probe & PCI_ROOT_NO_CRS) | |
157 | pci_use_crs = false; | |
158 | else if (pci_probe & PCI_USE__CRS) | |
159 | pci_use_crs = true; | |
160 | ||
161 | printk(KERN_INFO "PCI: %s host bridge windows from ACPI; " | |
162 | "if necessary, use \"pci=%s\" and report a bug\n", | |
163 | pci_use_crs ? "Using" : "Ignoring", | |
164 | pci_use_crs ? "nocrs" : "use_crs"); | |
165 | } | |
166 | ||
c0fa4078 | 167 | #ifdef CONFIG_PCI_MMCONFIG |
a18e3690 | 168 | static int check_segment(u16 seg, struct device *dev, char *estr) |
c0fa4078 JL |
169 | { |
170 | if (seg) { | |
171 | dev_err(dev, | |
172 | "%s can't access PCI configuration " | |
173 | "space under this host bridge.\n", | |
174 | estr); | |
175 | return -EIO; | |
176 | } | |
177 | ||
178 | /* | |
179 | * Failure in adding MMCFG information is not fatal, | |
180 | * just can't access extended configuration space of | |
181 | * devices under this host bridge. | |
182 | */ | |
183 | dev_warn(dev, | |
184 | "%s can't access extended PCI configuration " | |
185 | "space under this bridge.\n", | |
186 | estr); | |
187 | ||
188 | return 0; | |
189 | } | |
190 | ||
4d6b4e69 | 191 | static int setup_mcfg_map(struct acpi_pci_root_info *ci) |
c0fa4078 | 192 | { |
4d6b4e69 JL |
193 | int result, seg; |
194 | struct pci_root_info *info; | |
195 | struct acpi_pci_root *root = ci->root; | |
196 | struct device *dev = &ci->bridge->dev; | |
c0fa4078 | 197 | |
4d6b4e69 JL |
198 | info = container_of(ci, struct pci_root_info, common); |
199 | info->start_bus = (u8)root->secondary.start; | |
200 | info->end_bus = (u8)root->secondary.end; | |
c0fa4078 | 201 | info->mcfg_added = false; |
4d6b4e69 | 202 | seg = info->sd.domain; |
c0fa4078 JL |
203 | |
204 | /* return success if MMCFG is not in use */ | |
205 | if (raw_pci_ext_ops && raw_pci_ext_ops != &pci_mmcfg) | |
206 | return 0; | |
207 | ||
208 | if (!(pci_probe & PCI_PROBE_MMCONF)) | |
209 | return check_segment(seg, dev, "MMCONFIG is disabled,"); | |
210 | ||
4d6b4e69 JL |
211 | result = pci_mmconfig_insert(dev, seg, info->start_bus, info->end_bus, |
212 | root->mcfg_addr); | |
c0fa4078 JL |
213 | if (result == 0) { |
214 | /* enable MMCFG if it hasn't been enabled yet */ | |
215 | if (raw_pci_ext_ops == NULL) | |
216 | raw_pci_ext_ops = &pci_mmcfg; | |
217 | info->mcfg_added = true; | |
218 | } else if (result != -EEXIST) | |
219 | return check_segment(seg, dev, | |
220 | "fail to add MMCONFIG information,"); | |
221 | ||
222 | return 0; | |
223 | } | |
224 | ||
4d6b4e69 | 225 | static void teardown_mcfg_map(struct acpi_pci_root_info *ci) |
c0fa4078 | 226 | { |
4d6b4e69 JL |
227 | struct pci_root_info *info; |
228 | ||
229 | info = container_of(ci, struct pci_root_info, common); | |
c0fa4078 | 230 | if (info->mcfg_added) { |
4d6b4e69 JL |
231 | pci_mmconfig_delete(info->sd.domain, |
232 | info->start_bus, info->end_bus); | |
c0fa4078 JL |
233 | info->mcfg_added = false; |
234 | } | |
235 | } | |
236 | #else | |
4d6b4e69 | 237 | static int setup_mcfg_map(struct acpi_pci_root_info *ci) |
c0fa4078 JL |
238 | { |
239 | return 0; | |
240 | } | |
4d6b4e69 JL |
241 | |
242 | static void teardown_mcfg_map(struct acpi_pci_root_info *ci) | |
c0fa4078 JL |
243 | { |
244 | } | |
245 | #endif | |
246 | ||
4d6b4e69 | 247 | static int pci_acpi_root_get_node(struct acpi_pci_root *root) |
62f420f8 | 248 | { |
4d6b4e69 JL |
249 | int busnum = root->secondary.start; |
250 | struct acpi_device *device = root->device; | |
251 | int node = acpi_get_node(device->handle); | |
593669c2 | 252 | |
4d6b4e69 JL |
253 | if (node == NUMA_NO_NODE) { |
254 | node = x86_pci_root_bus_node(busnum); | |
255 | if (node != 0 && node != NUMA_NO_NODE) | |
256 | dev_info(&device->dev, FW_BUG "no _PXM; falling back to node %d from hardware (may be inconsistent with ACPI node numbers)\n", | |
257 | node); | |
4723d0f2 | 258 | } |
4d6b4e69 JL |
259 | if (node != NUMA_NO_NODE && !node_online(node)) |
260 | node = NUMA_NO_NODE; | |
261 | ||
262 | return node; | |
4723d0f2 BH |
263 | } |
264 | ||
4d6b4e69 | 265 | static int pci_acpi_root_init_info(struct acpi_pci_root_info *ci) |
4723d0f2 | 266 | { |
4d6b4e69 | 267 | return setup_mcfg_map(ci); |
fd3b0c1e YL |
268 | } |
269 | ||
4d6b4e69 | 270 | static void pci_acpi_root_release_info(struct acpi_pci_root_info *ci) |
fd3b0c1e | 271 | { |
4d6b4e69 JL |
272 | teardown_mcfg_map(ci); |
273 | kfree(container_of(ci, struct pci_root_info, common)); | |
fd3b0c1e | 274 | } |
c0fa4078 | 275 | |
2c62e849 JL |
276 | /* |
277 | * An IO port or MMIO resource assigned to a PCI host bridge may be | |
278 | * consumed by the host bridge itself or available to its child | |
279 | * bus/devices. The ACPI specification defines a bit (Producer/Consumer) | |
280 | * to tell whether the resource is consumed by the host bridge itself, | |
281 | * but firmware hasn't used that bit consistently, so we can't rely on it. | |
282 | * | |
283 | * On x86 and IA64 platforms, all IO port and MMIO resources are assumed | |
284 | * to be available to child bus/devices except one special case: | |
285 | * IO port [0xCF8-0xCFF] is consumed by the host bridge itself | |
286 | * to access PCI configuration space. | |
287 | * | |
288 | * So explicitly filter out PCI CFG IO ports[0xCF8-0xCFF]. | |
289 | */ | |
290 | static bool resource_is_pcicfg_ioport(struct resource *res) | |
291 | { | |
292 | return (res->flags & IORESOURCE_IO) && | |
293 | res->start == 0xCF8 && res->end == 0xCFF; | |
294 | } | |
295 | ||
4d6b4e69 | 296 | static int pci_acpi_root_prepare_resources(struct acpi_pci_root_info *ci) |
62f420f8 | 297 | { |
4d6b4e69 JL |
298 | struct acpi_device *device = ci->bridge; |
299 | int busnum = ci->root->secondary.start; | |
63f1789e | 300 | struct resource_entry *entry, *tmp; |
4d6b4e69 | 301 | int status; |
62f420f8 | 302 | |
4d6b4e69 JL |
303 | status = acpi_pci_probe_root_resources(ci); |
304 | if (pci_use_crs) { | |
305 | resource_list_for_each_entry_safe(entry, tmp, &ci->resources) | |
306 | if (resource_is_pcicfg_ioport(entry->res)) | |
63f1789e | 307 | resource_list_destroy_entry(entry); |
4d6b4e69 JL |
308 | return status; |
309 | } | |
310 | ||
311 | resource_list_for_each_entry_safe(entry, tmp, &ci->resources) { | |
312 | dev_printk(KERN_DEBUG, &device->dev, | |
313 | "host bridge window %pR (ignored)\n", entry->res); | |
314 | resource_list_destroy_entry(entry); | |
315 | } | |
316 | x86_pci_root_bus_resources(busnum, &ci->resources); | |
317 | ||
318 | return 0; | |
62f420f8 GH |
319 | } |
320 | ||
4d6b4e69 JL |
321 | static struct acpi_pci_root_ops acpi_pci_root_ops = { |
322 | .pci_ops = &pci_root_ops, | |
323 | .init_info = pci_acpi_root_init_info, | |
324 | .release_info = pci_acpi_root_release_info, | |
325 | .prepare_resources = pci_acpi_root_prepare_resources, | |
326 | }; | |
327 | ||
a18e3690 | 328 | struct pci_bus *pci_acpi_scan_root(struct acpi_pci_root *root) |
1da177e4 | 329 | { |
57283776 BH |
330 | int domain = root->segment; |
331 | int busnum = root->secondary.start; | |
4d6b4e69 | 332 | int node = pci_acpi_root_get_node(root); |
8928d5a6 | 333 | struct pci_bus *bus; |
08f1c192 | 334 | |
1f09b09b | 335 | if (pci_ignore_seg) |
a3669868 | 336 | root->segment = domain = 0; |
1f09b09b | 337 | |
a79e4198 | 338 | if (domain && !pci_domains_supported) { |
2a6bed83 BH |
339 | printk(KERN_WARNING "pci_bus %04x:%02x: " |
340 | "ignored (multiple domains not supported)\n", | |
341 | domain, busnum); | |
a79e4198 JG |
342 | return NULL; |
343 | } | |
344 | ||
b87e81e5 | 345 | bus = pci_find_bus(domain, busnum); |
346 | if (bus) { | |
347 | /* | |
affbda86 BH |
348 | * If the desired bus has been scanned already, replace |
349 | * its bus->sysdata. | |
b87e81e5 | 350 | */ |
4d6b4e69 JL |
351 | struct pci_sysdata sd = { |
352 | .domain = domain, | |
353 | .node = node, | |
354 | .companion = root->device | |
355 | }; | |
593669c2 | 356 | |
4d6b4e69 JL |
357 | memcpy(bus->sysdata, &sd, sizeof(sd)); |
358 | } else { | |
359 | struct pci_root_info *info; | |
360 | ||
361 | info = kzalloc_node(sizeof(*info), GFP_KERNEL, node); | |
362 | if (!info) | |
363 | dev_err(&root->device->dev, | |
364 | "pci_bus %04x:%02x: ignored (out of memory)\n", | |
365 | domain, busnum); | |
366 | else { | |
367 | info->sd.domain = domain; | |
368 | info->sd.node = node; | |
369 | info->sd.companion = root->device; | |
370 | bus = acpi_pci_root_create(root, &acpi_pci_root_ops, | |
371 | &info->common, &info->sd); | |
fd3b0c1e | 372 | } |
626fdfec | 373 | } |
08f1c192 | 374 | |
b03e7495 JM |
375 | /* After the PCI-E bus has been walked and all devices discovered, |
376 | * configure any settings of the fabric that might be necessary. | |
377 | */ | |
378 | if (bus) { | |
379 | struct pci_bus *child; | |
a58674ff BH |
380 | list_for_each_entry(child, &bus->children, node) |
381 | pcie_bus_configure_settings(child); | |
b03e7495 JM |
382 | } |
383 | ||
69e1a33f | 384 | return bus; |
1da177e4 LT |
385 | } |
386 | ||
6c0cc950 RW |
387 | int pcibios_root_bridge_prepare(struct pci_host_bridge *bridge) |
388 | { | |
dc4fdaf0 RW |
389 | /* |
390 | * We pass NULL as parent to pci_create_root_bus(), so if it is not NULL | |
391 | * here, pci_create_root_bus() has been called by someone else and | |
392 | * sysdata is likely to be different from what we expect. Let it go in | |
393 | * that case. | |
394 | */ | |
395 | if (!bridge->dev.parent) { | |
396 | struct pci_sysdata *sd = bridge->bus->sysdata; | |
397 | ACPI_COMPANION_SET(&bridge->dev, sd->companion); | |
398 | } | |
6c0cc950 RW |
399 | return 0; |
400 | } | |
401 | ||
8dd779b1 | 402 | int __init pci_acpi_init(void) |
1da177e4 LT |
403 | { |
404 | struct pci_dev *dev = NULL; | |
405 | ||
1da177e4 | 406 | if (acpi_noirq) |
b72d0db9 | 407 | return -ENODEV; |
1da177e4 LT |
408 | |
409 | printk(KERN_INFO "PCI: Using ACPI for IRQ routing\n"); | |
410 | acpi_irq_penalty_init(); | |
1da177e4 | 411 | pcibios_enable_irq = acpi_pci_irq_enable; |
87bec66b | 412 | pcibios_disable_irq = acpi_pci_irq_disable; |
ab3b3793 | 413 | x86_init.pci.init_irq = x86_init_noop; |
1da177e4 LT |
414 | |
415 | if (pci_routeirq) { | |
416 | /* | |
417 | * PCI IRQ routing is set up by pci_enable_device(), but we | |
418 | * also do it here in case there are still broken drivers that | |
419 | * don't use pci_enable_device(). | |
420 | */ | |
421 | printk(KERN_INFO "PCI: Routing PCI interrupts for all devices because \"pci=routeirq\" specified\n"); | |
fb37fb96 | 422 | for_each_pci_dev(dev) |
1da177e4 | 423 | acpi_pci_irq_enable(dev); |
657472e9 | 424 | } |
1da177e4 | 425 | |
1da177e4 LT |
426 | return 0; |
427 | } |