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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * drivers/pci/pci-driver.c | |
3 | * | |
2b937303 GKH |
4 | * (C) Copyright 2002-2004, 2007 Greg Kroah-Hartman <greg@kroah.com> |
5 | * (C) Copyright 2007 Novell Inc. | |
6 | * | |
7 | * Released under the GPL v2 only. | |
8 | * | |
1da177e4 LT |
9 | */ |
10 | ||
11 | #include <linux/pci.h> | |
12 | #include <linux/module.h> | |
13 | #include <linux/init.h> | |
14 | #include <linux/device.h> | |
d42c6997 | 15 | #include <linux/mempolicy.h> |
4e57b681 TS |
16 | #include <linux/string.h> |
17 | #include <linux/slab.h> | |
8c65b4a6 | 18 | #include <linux/sched.h> |
873392ca | 19 | #include <linux/cpu.h> |
6cbf8214 | 20 | #include <linux/pm_runtime.h> |
eea3fc03 | 21 | #include <linux/suspend.h> |
4fc9bbf9 | 22 | #include <linux/kexec.h> |
1da177e4 LT |
23 | #include "pci.h" |
24 | ||
75865858 GKH |
25 | struct pci_dynid { |
26 | struct list_head node; | |
27 | struct pci_device_id id; | |
28 | }; | |
1da177e4 | 29 | |
9dba910e TH |
30 | /** |
31 | * pci_add_dynid - add a new PCI device ID to this driver and re-probe devices | |
32 | * @drv: target pci driver | |
33 | * @vendor: PCI vendor ID | |
34 | * @device: PCI device ID | |
35 | * @subvendor: PCI subvendor ID | |
36 | * @subdevice: PCI subdevice ID | |
37 | * @class: PCI class | |
38 | * @class_mask: PCI class mask | |
39 | * @driver_data: private driver data | |
40 | * | |
41 | * Adds a new dynamic pci device ID to this driver and causes the | |
42 | * driver to probe for all devices again. @drv must have been | |
43 | * registered prior to calling this function. | |
44 | * | |
45 | * CONTEXT: | |
46 | * Does GFP_KERNEL allocation. | |
47 | * | |
48 | * RETURNS: | |
49 | * 0 on success, -errno on failure. | |
50 | */ | |
51 | int pci_add_dynid(struct pci_driver *drv, | |
52 | unsigned int vendor, unsigned int device, | |
53 | unsigned int subvendor, unsigned int subdevice, | |
54 | unsigned int class, unsigned int class_mask, | |
55 | unsigned long driver_data) | |
56 | { | |
57 | struct pci_dynid *dynid; | |
9dba910e TH |
58 | |
59 | dynid = kzalloc(sizeof(*dynid), GFP_KERNEL); | |
60 | if (!dynid) | |
61 | return -ENOMEM; | |
62 | ||
63 | dynid->id.vendor = vendor; | |
64 | dynid->id.device = device; | |
65 | dynid->id.subvendor = subvendor; | |
66 | dynid->id.subdevice = subdevice; | |
67 | dynid->id.class = class; | |
68 | dynid->id.class_mask = class_mask; | |
69 | dynid->id.driver_data = driver_data; | |
3d3c2ae1 | 70 | |
9dba910e TH |
71 | spin_lock(&drv->dynids.lock); |
72 | list_add_tail(&dynid->node, &drv->dynids.list); | |
73 | spin_unlock(&drv->dynids.lock); | |
74 | ||
3b7f1016 | 75 | return driver_attach(&drv->driver); |
9dba910e | 76 | } |
b7fe9434 | 77 | EXPORT_SYMBOL_GPL(pci_add_dynid); |
9dba910e TH |
78 | |
79 | static void pci_free_dynids(struct pci_driver *drv) | |
80 | { | |
81 | struct pci_dynid *dynid, *n; | |
3d3c2ae1 | 82 | |
9dba910e TH |
83 | spin_lock(&drv->dynids.lock); |
84 | list_for_each_entry_safe(dynid, n, &drv->dynids.list, node) { | |
85 | list_del(&dynid->node); | |
86 | kfree(dynid); | |
87 | } | |
88 | spin_unlock(&drv->dynids.lock); | |
89 | } | |
90 | ||
1da177e4 | 91 | /** |
9dba910e | 92 | * store_new_id - sysfs frontend to pci_add_dynid() |
8f7020d3 RD |
93 | * @driver: target device driver |
94 | * @buf: buffer for scanning device ID data | |
95 | * @count: input size | |
1da177e4 | 96 | * |
9dba910e | 97 | * Allow PCI IDs to be added to an existing driver via sysfs. |
1da177e4 | 98 | */ |
a9427741 | 99 | static ssize_t new_id_store(struct device_driver *driver, const char *buf, |
3c78bc61 | 100 | size_t count) |
1da177e4 | 101 | { |
1da177e4 | 102 | struct pci_driver *pdrv = to_pci_driver(driver); |
b41d6cf3 | 103 | const struct pci_device_id *ids = pdrv->id_table; |
3c78bc61 RD |
104 | __u32 vendor, device, subvendor = PCI_ANY_ID, |
105 | subdevice = PCI_ANY_ID, class = 0, class_mask = 0; | |
106 | unsigned long driver_data = 0; | |
107 | int fields = 0; | |
8895d3bc | 108 | int retval = 0; |
1da177e4 | 109 | |
b41d6cf3 | 110 | fields = sscanf(buf, "%x %x %x %x %x %x %lx", |
1da177e4 LT |
111 | &vendor, &device, &subvendor, &subdevice, |
112 | &class, &class_mask, &driver_data); | |
6ba18636 | 113 | if (fields < 2) |
1da177e4 LT |
114 | return -EINVAL; |
115 | ||
8895d3bc BD |
116 | if (fields != 7) { |
117 | struct pci_dev *pdev = kzalloc(sizeof(*pdev), GFP_KERNEL); | |
118 | if (!pdev) | |
119 | return -ENOMEM; | |
120 | ||
121 | pdev->vendor = vendor; | |
122 | pdev->device = device; | |
123 | pdev->subsystem_vendor = subvendor; | |
124 | pdev->subsystem_device = subdevice; | |
125 | pdev->class = class; | |
126 | ||
127 | if (pci_match_id(pdrv->id_table, pdev)) | |
128 | retval = -EEXIST; | |
129 | ||
130 | kfree(pdev); | |
131 | ||
132 | if (retval) | |
133 | return retval; | |
134 | } | |
135 | ||
b41d6cf3 JD |
136 | /* Only accept driver_data values that match an existing id_table |
137 | entry */ | |
2debb4d2 CW |
138 | if (ids) { |
139 | retval = -EINVAL; | |
140 | while (ids->vendor || ids->subvendor || ids->class_mask) { | |
141 | if (driver_data == ids->driver_data) { | |
142 | retval = 0; | |
143 | break; | |
144 | } | |
145 | ids++; | |
b41d6cf3 | 146 | } |
2debb4d2 CW |
147 | if (retval) /* No match */ |
148 | return retval; | |
b41d6cf3 | 149 | } |
b41d6cf3 | 150 | |
9dba910e TH |
151 | retval = pci_add_dynid(pdrv, vendor, device, subvendor, subdevice, |
152 | class, class_mask, driver_data); | |
b19441af GKH |
153 | if (retval) |
154 | return retval; | |
1da177e4 LT |
155 | return count; |
156 | } | |
a9427741 | 157 | static DRIVER_ATTR_WO(new_id); |
1da177e4 | 158 | |
0994375e CW |
159 | /** |
160 | * store_remove_id - remove a PCI device ID from this driver | |
161 | * @driver: target device driver | |
162 | * @buf: buffer for scanning device ID data | |
163 | * @count: input size | |
164 | * | |
165 | * Removes a dynamic pci device ID to this driver. | |
166 | */ | |
a9427741 | 167 | static ssize_t remove_id_store(struct device_driver *driver, const char *buf, |
3c78bc61 | 168 | size_t count) |
0994375e CW |
169 | { |
170 | struct pci_dynid *dynid, *n; | |
171 | struct pci_driver *pdrv = to_pci_driver(driver); | |
172 | __u32 vendor, device, subvendor = PCI_ANY_ID, | |
173 | subdevice = PCI_ANY_ID, class = 0, class_mask = 0; | |
174 | int fields = 0; | |
9222097f | 175 | size_t retval = -ENODEV; |
0994375e CW |
176 | |
177 | fields = sscanf(buf, "%x %x %x %x %x %x", | |
178 | &vendor, &device, &subvendor, &subdevice, | |
179 | &class, &class_mask); | |
180 | if (fields < 2) | |
181 | return -EINVAL; | |
182 | ||
183 | spin_lock(&pdrv->dynids.lock); | |
184 | list_for_each_entry_safe(dynid, n, &pdrv->dynids.list, node) { | |
185 | struct pci_device_id *id = &dynid->id; | |
186 | if ((id->vendor == vendor) && | |
187 | (id->device == device) && | |
188 | (subvendor == PCI_ANY_ID || id->subvendor == subvendor) && | |
189 | (subdevice == PCI_ANY_ID || id->subdevice == subdevice) && | |
190 | !((id->class ^ class) & class_mask)) { | |
191 | list_del(&dynid->node); | |
192 | kfree(dynid); | |
9222097f | 193 | retval = count; |
0994375e CW |
194 | break; |
195 | } | |
196 | } | |
197 | spin_unlock(&pdrv->dynids.lock); | |
198 | ||
9222097f | 199 | return retval; |
0994375e | 200 | } |
a9427741 | 201 | static DRIVER_ATTR_WO(remove_id); |
0994375e | 202 | |
2229c1fb GKH |
203 | static struct attribute *pci_drv_attrs[] = { |
204 | &driver_attr_new_id.attr, | |
205 | &driver_attr_remove_id.attr, | |
206 | NULL, | |
bfb09a86 | 207 | }; |
2229c1fb | 208 | ATTRIBUTE_GROUPS(pci_drv); |
0994375e | 209 | |
1da177e4 | 210 | /** |
75865858 | 211 | * pci_match_id - See if a pci device matches a given pci_id table |
1da177e4 | 212 | * @ids: array of PCI device id structures to search in |
75865858 GKH |
213 | * @dev: the PCI device structure to match against. |
214 | * | |
1da177e4 | 215 | * Used by a driver to check whether a PCI device present in the |
75865858 | 216 | * system is in its list of supported devices. Returns the matching |
1da177e4 | 217 | * pci_device_id structure or %NULL if there is no match. |
75865858 | 218 | * |
8b60756a | 219 | * Deprecated, don't use this as it will not catch any dynamic ids |
75865858 | 220 | * that a driver might want to check for. |
1da177e4 | 221 | */ |
75865858 GKH |
222 | const struct pci_device_id *pci_match_id(const struct pci_device_id *ids, |
223 | struct pci_dev *dev) | |
1da177e4 | 224 | { |
75865858 GKH |
225 | if (ids) { |
226 | while (ids->vendor || ids->subvendor || ids->class_mask) { | |
227 | if (pci_match_one_device(ids, dev)) | |
228 | return ids; | |
229 | ids++; | |
230 | } | |
1da177e4 LT |
231 | } |
232 | return NULL; | |
233 | } | |
b7fe9434 | 234 | EXPORT_SYMBOL(pci_match_id); |
1da177e4 | 235 | |
782a985d AW |
236 | static const struct pci_device_id pci_device_id_any = { |
237 | .vendor = PCI_ANY_ID, | |
238 | .device = PCI_ANY_ID, | |
239 | .subvendor = PCI_ANY_ID, | |
240 | .subdevice = PCI_ANY_ID, | |
241 | }; | |
242 | ||
1da177e4 | 243 | /** |
ae9608af | 244 | * pci_match_device - Tell if a PCI device structure has a matching PCI device id structure |
75865858 | 245 | * @drv: the PCI driver to match against |
39ba487f | 246 | * @dev: the PCI device structure to match against |
75865858 GKH |
247 | * |
248 | * Used by a driver to check whether a PCI device present in the | |
249 | * system is in its list of supported devices. Returns the matching | |
250 | * pci_device_id structure or %NULL if there is no match. | |
1da177e4 | 251 | */ |
d73460d7 AB |
252 | static const struct pci_device_id *pci_match_device(struct pci_driver *drv, |
253 | struct pci_dev *dev) | |
75865858 | 254 | { |
75865858 | 255 | struct pci_dynid *dynid; |
782a985d AW |
256 | const struct pci_device_id *found_id = NULL; |
257 | ||
258 | /* When driver_override is set, only bind to the matching driver */ | |
259 | if (dev->driver_override && strcmp(dev->driver_override, drv->name)) | |
260 | return NULL; | |
1da177e4 | 261 | |
7461b60a | 262 | /* Look at the dynamic ids first, before the static ones */ |
75865858 GKH |
263 | spin_lock(&drv->dynids.lock); |
264 | list_for_each_entry(dynid, &drv->dynids.list, node) { | |
265 | if (pci_match_one_device(&dynid->id, dev)) { | |
782a985d AW |
266 | found_id = &dynid->id; |
267 | break; | |
75865858 | 268 | } |
1da177e4 | 269 | } |
75865858 | 270 | spin_unlock(&drv->dynids.lock); |
7461b60a | 271 | |
782a985d AW |
272 | if (!found_id) |
273 | found_id = pci_match_id(drv->id_table, dev); | |
274 | ||
275 | /* driver_override will always match, send a dummy id */ | |
276 | if (!found_id && dev->driver_override) | |
277 | found_id = &pci_device_id_any; | |
278 | ||
279 | return found_id; | |
1da177e4 LT |
280 | } |
281 | ||
873392ca RR |
282 | struct drv_dev_and_id { |
283 | struct pci_driver *drv; | |
284 | struct pci_dev *dev; | |
285 | const struct pci_device_id *id; | |
286 | }; | |
287 | ||
288 | static long local_pci_probe(void *_ddi) | |
289 | { | |
290 | struct drv_dev_and_id *ddi = _ddi; | |
967577b0 HY |
291 | struct pci_dev *pci_dev = ddi->dev; |
292 | struct pci_driver *pci_drv = ddi->drv; | |
293 | struct device *dev = &pci_dev->dev; | |
f3ec4f87 AS |
294 | int rc; |
295 | ||
967577b0 HY |
296 | /* |
297 | * Unbound PCI devices are always put in D0, regardless of | |
298 | * runtime PM status. During probe, the device is set to | |
299 | * active and the usage count is incremented. If the driver | |
a8360062 RW |
300 | * supports runtime PM, it should call pm_runtime_put_noidle(), |
301 | * or any other runtime PM helper function decrementing the usage | |
302 | * count, in its probe routine and pm_runtime_get_noresume() in | |
303 | * its remove routine. | |
f3ec4f87 | 304 | */ |
967577b0 HY |
305 | pm_runtime_get_sync(dev); |
306 | pci_dev->driver = pci_drv; | |
307 | rc = pci_drv->probe(pci_dev, ddi->id); | |
f92d74c1 SC |
308 | if (!rc) |
309 | return rc; | |
310 | if (rc < 0) { | |
967577b0 HY |
311 | pci_dev->driver = NULL; |
312 | pm_runtime_put_sync(dev); | |
f92d74c1 | 313 | return rc; |
f3ec4f87 | 314 | } |
f92d74c1 SC |
315 | /* |
316 | * Probe function should return < 0 for failure, 0 for success | |
317 | * Treat values > 0 as success, but warn. | |
318 | */ | |
319 | dev_warn(dev, "Driver probe function unexpectedly returned %d\n", rc); | |
320 | return 0; | |
873392ca RR |
321 | } |
322 | ||
0b2c2a71 TG |
323 | static bool pci_physfn_is_probed(struct pci_dev *dev) |
324 | { | |
325 | #ifdef CONFIG_PCI_IOV | |
326 | return dev->is_virtfn && dev->physfn->is_probed; | |
327 | #else | |
328 | return false; | |
329 | #endif | |
330 | } | |
331 | ||
d42c6997 AK |
332 | static int pci_call_probe(struct pci_driver *drv, struct pci_dev *dev, |
333 | const struct pci_device_id *id) | |
334 | { | |
0b2c2a71 | 335 | int error, node, cpu; |
873392ca RR |
336 | struct drv_dev_and_id ddi = { drv, dev, id }; |
337 | ||
12c3156f AD |
338 | /* |
339 | * Execute driver initialization on node where the device is | |
340 | * attached. This way the driver likely allocates its local memory | |
341 | * on the right node. | |
342 | */ | |
873392ca | 343 | node = dev_to_node(&dev->dev); |
0b2c2a71 TG |
344 | dev->is_probed = 1; |
345 | ||
346 | cpu_hotplug_disable(); | |
12c3156f AD |
347 | |
348 | /* | |
0b2c2a71 TG |
349 | * Prevent nesting work_on_cpu() for the case where a Virtual Function |
350 | * device is probed from work_on_cpu() of the Physical device. | |
12c3156f | 351 | */ |
0b2c2a71 TG |
352 | if (node < 0 || node >= MAX_NUMNODES || !node_online(node) || |
353 | pci_physfn_is_probed(dev)) | |
354 | cpu = nr_cpu_ids; | |
355 | else | |
a70f7302 | 356 | cpu = cpumask_any_and(cpumask_of_node(node), cpu_online_mask); |
0b2c2a71 TG |
357 | |
358 | if (cpu < nr_cpu_ids) | |
359 | error = work_on_cpu(cpu, local_pci_probe, &ddi); | |
360 | else | |
873392ca | 361 | error = local_pci_probe(&ddi); |
12c3156f | 362 | |
0b2c2a71 TG |
363 | dev->is_probed = 0; |
364 | cpu_hotplug_enable(); | |
d42c6997 AK |
365 | return error; |
366 | } | |
367 | ||
1da177e4 | 368 | /** |
23ea3793 | 369 | * __pci_device_probe - check if a driver wants to claim a specific PCI device |
8f7020d3 RD |
370 | * @drv: driver to call to check if it wants the PCI device |
371 | * @pci_dev: PCI device being probed | |
f7625980 | 372 | * |
8f7020d3 | 373 | * returns 0 on success, else error. |
1da177e4 LT |
374 | * side-effect: pci_dev->driver is set to drv when drv claims pci_dev. |
375 | */ | |
3c78bc61 | 376 | static int __pci_device_probe(struct pci_driver *drv, struct pci_dev *pci_dev) |
75865858 GKH |
377 | { |
378 | const struct pci_device_id *id; | |
1da177e4 LT |
379 | int error = 0; |
380 | ||
381 | if (!pci_dev->driver && drv->probe) { | |
75865858 GKH |
382 | error = -ENODEV; |
383 | ||
384 | id = pci_match_device(drv, pci_dev); | |
385 | if (id) | |
d42c6997 | 386 | error = pci_call_probe(drv, pci_dev, id); |
1da177e4 LT |
387 | } |
388 | return error; | |
389 | } | |
390 | ||
890e4847 JL |
391 | int __weak pcibios_alloc_irq(struct pci_dev *dev) |
392 | { | |
393 | return 0; | |
394 | } | |
395 | ||
396 | void __weak pcibios_free_irq(struct pci_dev *dev) | |
397 | { | |
398 | } | |
399 | ||
0e7df224 BW |
400 | #ifdef CONFIG_PCI_IOV |
401 | static inline bool pci_device_can_probe(struct pci_dev *pdev) | |
402 | { | |
403 | return (!pdev->is_virtfn || pdev->physfn->sriov->drivers_autoprobe); | |
404 | } | |
405 | #else | |
406 | static inline bool pci_device_can_probe(struct pci_dev *pdev) | |
407 | { | |
408 | return true; | |
409 | } | |
410 | #endif | |
411 | ||
3c78bc61 | 412 | static int pci_device_probe(struct device *dev) |
1da177e4 | 413 | { |
890e4847 JL |
414 | int error; |
415 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
416 | struct pci_driver *drv = to_pci_driver(dev->driver); | |
417 | ||
30fdfb92 MM |
418 | pci_assign_irq(pci_dev); |
419 | ||
890e4847 JL |
420 | error = pcibios_alloc_irq(pci_dev); |
421 | if (error < 0) | |
422 | return error; | |
1da177e4 | 423 | |
1da177e4 | 424 | pci_dev_get(pci_dev); |
0e7df224 BW |
425 | if (pci_device_can_probe(pci_dev)) { |
426 | error = __pci_device_probe(drv, pci_dev); | |
427 | if (error) { | |
428 | pcibios_free_irq(pci_dev); | |
429 | pci_dev_put(pci_dev); | |
430 | } | |
890e4847 | 431 | } |
1da177e4 LT |
432 | |
433 | return error; | |
434 | } | |
435 | ||
3c78bc61 | 436 | static int pci_device_remove(struct device *dev) |
1da177e4 | 437 | { |
3c78bc61 RD |
438 | struct pci_dev *pci_dev = to_pci_dev(dev); |
439 | struct pci_driver *drv = pci_dev->driver; | |
1da177e4 LT |
440 | |
441 | if (drv) { | |
f3ec4f87 AS |
442 | if (drv->remove) { |
443 | pm_runtime_get_sync(dev); | |
1da177e4 | 444 | drv->remove(pci_dev); |
f3ec4f87 AS |
445 | pm_runtime_put_noidle(dev); |
446 | } | |
890e4847 | 447 | pcibios_free_irq(pci_dev); |
1da177e4 LT |
448 | pci_dev->driver = NULL; |
449 | } | |
450 | ||
f3ec4f87 | 451 | /* Undo the runtime PM settings in local_pci_probe() */ |
967577b0 | 452 | pm_runtime_put_sync(dev); |
f3ec4f87 | 453 | |
2449e06a SL |
454 | /* |
455 | * If the device is still on, set the power state as "unknown", | |
456 | * since it might change by the next time we load the driver. | |
457 | */ | |
458 | if (pci_dev->current_state == PCI_D0) | |
459 | pci_dev->current_state = PCI_UNKNOWN; | |
460 | ||
1da177e4 LT |
461 | /* |
462 | * We would love to complain here if pci_dev->is_enabled is set, that | |
463 | * the driver should have called pci_disable_device(), but the | |
464 | * unfortunate fact is there are too many odd BIOS and bridge setups | |
f7625980 | 465 | * that don't like drivers doing that all of the time. |
1da177e4 LT |
466 | * Oh well, we can dream of sane hardware when we sleep, no matter how |
467 | * horrible the crap we have to deal with is when we are awake... | |
468 | */ | |
469 | ||
470 | pci_dev_put(pci_dev); | |
471 | return 0; | |
472 | } | |
473 | ||
bbb44d9f RW |
474 | static void pci_device_shutdown(struct device *dev) |
475 | { | |
476 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
477 | struct pci_driver *drv = pci_dev->driver; | |
478 | ||
3ff2de9b HY |
479 | pm_runtime_resume(dev); |
480 | ||
bbb44d9f RW |
481 | if (drv && drv->shutdown) |
482 | drv->shutdown(pci_dev); | |
5b415f1e | 483 | |
b566a22c | 484 | /* |
4fc9bbf9 KA |
485 | * If this is a kexec reboot, turn off Bus Master bit on the |
486 | * device to tell it to not continue to do DMA. Don't touch | |
487 | * devices in D3cold or unknown states. | |
488 | * If it is not a kexec reboot, firmware will hit the PCI | |
489 | * devices with big hammer and stop their DMA any way. | |
b566a22c | 490 | */ |
4fc9bbf9 | 491 | if (kexec_in_progress && (pci_dev->current_state <= PCI_D3hot)) |
6e0eda3c | 492 | pci_clear_master(pci_dev); |
bbb44d9f RW |
493 | } |
494 | ||
aa338601 | 495 | #ifdef CONFIG_PM |
6cbf8214 RW |
496 | |
497 | /* Auxiliary functions used for system resume and run-time resume. */ | |
498 | ||
499 | /** | |
500 | * pci_restore_standard_config - restore standard config registers of PCI device | |
501 | * @pci_dev: PCI device to handle | |
502 | */ | |
503 | static int pci_restore_standard_config(struct pci_dev *pci_dev) | |
504 | { | |
505 | pci_update_current_state(pci_dev, PCI_UNKNOWN); | |
506 | ||
507 | if (pci_dev->current_state != PCI_D0) { | |
508 | int error = pci_set_power_state(pci_dev, PCI_D0); | |
509 | if (error) | |
510 | return error; | |
511 | } | |
512 | ||
1d3c16a8 | 513 | pci_restore_state(pci_dev); |
0ce3fcaf | 514 | pci_pme_restore(pci_dev); |
1d3c16a8 | 515 | return 0; |
6cbf8214 RW |
516 | } |
517 | ||
db288c9c RW |
518 | #endif |
519 | ||
520 | #ifdef CONFIG_PM_SLEEP | |
521 | ||
6cbf8214 RW |
522 | static void pci_pm_default_resume_early(struct pci_dev *pci_dev) |
523 | { | |
db288c9c RW |
524 | pci_power_up(pci_dev); |
525 | pci_restore_state(pci_dev); | |
0ce3fcaf | 526 | pci_pme_restore(pci_dev); |
6cbf8214 RW |
527 | pci_fixup_device(pci_fixup_resume_early, pci_dev); |
528 | } | |
529 | ||
fa58d305 RW |
530 | /* |
531 | * Default "suspend" method for devices that have no driver provided suspend, | |
532 | * or not even a driver at all (second part). | |
bbb44d9f | 533 | */ |
bb808945 | 534 | static void pci_pm_set_unknown_state(struct pci_dev *pci_dev) |
bbb44d9f | 535 | { |
bbb44d9f RW |
536 | /* |
537 | * mark its power state as "unknown", since we don't know if | |
538 | * e.g. the BIOS will change its device state when we suspend. | |
539 | */ | |
540 | if (pci_dev->current_state == PCI_D0) | |
541 | pci_dev->current_state = PCI_UNKNOWN; | |
542 | } | |
543 | ||
355a72d7 RW |
544 | /* |
545 | * Default "resume" method for devices that have no driver provided resume, | |
546 | * or not even a driver at all (second part). | |
547 | */ | |
bb808945 | 548 | static int pci_pm_reenable_device(struct pci_dev *pci_dev) |
355a72d7 RW |
549 | { |
550 | int retval; | |
551 | ||
bbb44d9f RW |
552 | /* if the device was enabled before suspend, reenable */ |
553 | retval = pci_reenable_device(pci_dev); | |
554 | /* | |
555 | * if the device was busmaster before the suspend, make it busmaster | |
556 | * again | |
557 | */ | |
558 | if (pci_dev->is_busmaster) | |
559 | pci_set_master(pci_dev); | |
560 | ||
561 | return retval; | |
562 | } | |
563 | ||
564 | static int pci_legacy_suspend(struct device *dev, pm_message_t state) | |
1da177e4 | 565 | { |
3c78bc61 RD |
566 | struct pci_dev *pci_dev = to_pci_dev(dev); |
567 | struct pci_driver *drv = pci_dev->driver; | |
46939f8b | 568 | |
02669492 | 569 | if (drv && drv->suspend) { |
99dadce8 | 570 | pci_power_t prev = pci_dev->current_state; |
46939f8b | 571 | int error; |
aa8c6c93 | 572 | |
57ef8026 FP |
573 | error = drv->suspend(pci_dev, state); |
574 | suspend_report_result(drv->suspend, error); | |
575 | if (error) | |
576 | return error; | |
aa8c6c93 | 577 | |
46939f8b | 578 | if (!pci_dev->state_saved && pci_dev->current_state != PCI_D0 |
99dadce8 RW |
579 | && pci_dev->current_state != PCI_UNKNOWN) { |
580 | WARN_ONCE(pci_dev->current_state != prev, | |
581 | "PCI PM: Device state not saved by %pF\n", | |
582 | drv->suspend); | |
99dadce8 | 583 | } |
02669492 | 584 | } |
ad8cfa1d RW |
585 | |
586 | pci_fixup_device(pci_fixup_suspend, pci_dev); | |
587 | ||
46939f8b | 588 | return 0; |
1da177e4 LT |
589 | } |
590 | ||
bbb44d9f | 591 | static int pci_legacy_suspend_late(struct device *dev, pm_message_t state) |
cbd69dbb | 592 | { |
3c78bc61 RD |
593 | struct pci_dev *pci_dev = to_pci_dev(dev); |
594 | struct pci_driver *drv = pci_dev->driver; | |
cbd69dbb LT |
595 | |
596 | if (drv && drv->suspend_late) { | |
46939f8b RW |
597 | pci_power_t prev = pci_dev->current_state; |
598 | int error; | |
599 | ||
57ef8026 FP |
600 | error = drv->suspend_late(pci_dev, state); |
601 | suspend_report_result(drv->suspend_late, error); | |
46939f8b RW |
602 | if (error) |
603 | return error; | |
604 | ||
605 | if (!pci_dev->state_saved && pci_dev->current_state != PCI_D0 | |
606 | && pci_dev->current_state != PCI_UNKNOWN) { | |
607 | WARN_ONCE(pci_dev->current_state != prev, | |
608 | "PCI PM: Device state not saved by %pF\n", | |
609 | drv->suspend_late); | |
7d2a01b8 | 610 | goto Fixup; |
46939f8b | 611 | } |
cbd69dbb | 612 | } |
46939f8b RW |
613 | |
614 | if (!pci_dev->state_saved) | |
615 | pci_save_state(pci_dev); | |
616 | ||
617 | pci_pm_set_unknown_state(pci_dev); | |
618 | ||
7d2a01b8 AN |
619 | Fixup: |
620 | pci_fixup_device(pci_fixup_suspend_late, pci_dev); | |
621 | ||
46939f8b | 622 | return 0; |
cbd69dbb | 623 | } |
1da177e4 | 624 | |
f6dc1e5e RW |
625 | static int pci_legacy_resume_early(struct device *dev) |
626 | { | |
3c78bc61 RD |
627 | struct pci_dev *pci_dev = to_pci_dev(dev); |
628 | struct pci_driver *drv = pci_dev->driver; | |
f6dc1e5e | 629 | |
aa8c6c93 RW |
630 | return drv && drv->resume_early ? |
631 | drv->resume_early(pci_dev) : 0; | |
f6dc1e5e RW |
632 | } |
633 | ||
bbb44d9f | 634 | static int pci_legacy_resume(struct device *dev) |
1da177e4 | 635 | { |
3c78bc61 RD |
636 | struct pci_dev *pci_dev = to_pci_dev(dev); |
637 | struct pci_driver *drv = pci_dev->driver; | |
1da177e4 | 638 | |
ad8cfa1d RW |
639 | pci_fixup_device(pci_fixup_resume, pci_dev); |
640 | ||
aa8c6c93 RW |
641 | return drv && drv->resume ? |
642 | drv->resume(pci_dev) : pci_pm_reenable_device(pci_dev); | |
1da177e4 LT |
643 | } |
644 | ||
571ff758 RW |
645 | /* Auxiliary functions used by the new power management framework */ |
646 | ||
5294e256 | 647 | static void pci_pm_default_resume(struct pci_dev *pci_dev) |
571ff758 | 648 | { |
73410429 | 649 | pci_fixup_device(pci_fixup_resume, pci_dev); |
baecc470 | 650 | pci_enable_wake(pci_dev, PCI_D0, false); |
571ff758 RW |
651 | } |
652 | ||
5294e256 | 653 | static void pci_pm_default_suspend(struct pci_dev *pci_dev) |
73410429 | 654 | { |
5294e256 | 655 | /* Disable non-bridge devices without PM support */ |
326c1cda | 656 | if (!pci_has_subordinate(pci_dev)) |
cbbc2f6b | 657 | pci_disable_enabled_device(pci_dev); |
73410429 RW |
658 | } |
659 | ||
07e836e8 RW |
660 | static bool pci_has_legacy_pm_support(struct pci_dev *pci_dev) |
661 | { | |
662 | struct pci_driver *drv = pci_dev->driver; | |
bb808945 | 663 | bool ret = drv && (drv->suspend || drv->suspend_late || drv->resume |
07e836e8 | 664 | || drv->resume_early); |
bb808945 RW |
665 | |
666 | /* | |
667 | * Legacy PM support is used by default, so warn if the new framework is | |
668 | * supported as well. Drivers are supposed to support either the | |
669 | * former, or the latter, but not both at the same time. | |
670 | */ | |
82440a82 DF |
671 | WARN(ret && drv->driver.pm, "driver %s device %04x:%04x\n", |
672 | drv->name, pci_dev->vendor, pci_dev->device); | |
bb808945 RW |
673 | |
674 | return ret; | |
07e836e8 RW |
675 | } |
676 | ||
571ff758 RW |
677 | /* New power management framework */ |
678 | ||
bbb44d9f RW |
679 | static int pci_pm_prepare(struct device *dev) |
680 | { | |
681 | struct device_driver *drv = dev->driver; | |
bbb44d9f | 682 | |
bac2a909 RW |
683 | if (drv && drv->pm && drv->pm->prepare) { |
684 | int error = drv->pm->prepare(dev); | |
08810a41 | 685 | if (error < 0) |
bac2a909 | 686 | return error; |
08810a41 RW |
687 | |
688 | if (!error && dev_pm_test_driver_flags(dev, DPM_FLAG_SMART_PREPARE)) | |
689 | return 0; | |
bac2a909 RW |
690 | } |
691 | return pci_dev_keep_suspended(to_pci_dev(dev)); | |
bbb44d9f RW |
692 | } |
693 | ||
2cef548a RW |
694 | static void pci_pm_complete(struct device *dev) |
695 | { | |
a0d2a959 LW |
696 | struct pci_dev *pci_dev = to_pci_dev(dev); |
697 | ||
698 | pci_dev_complete_resume(pci_dev); | |
699 | pm_generic_complete(dev); | |
700 | ||
701 | /* Resume device if platform firmware has put it in reset-power-on */ | |
d7d80998 | 702 | if (pm_runtime_suspended(dev) && pm_resume_via_firmware()) { |
a0d2a959 LW |
703 | pci_power_t pre_sleep_state = pci_dev->current_state; |
704 | ||
705 | pci_update_current_state(pci_dev, pci_dev->current_state); | |
706 | if (pci_dev->current_state < pre_sleep_state) | |
707 | pm_request_resume(dev); | |
708 | } | |
2cef548a | 709 | } |
bbb44d9f | 710 | |
6cbf8214 RW |
711 | #else /* !CONFIG_PM_SLEEP */ |
712 | ||
713 | #define pci_pm_prepare NULL | |
2cef548a | 714 | #define pci_pm_complete NULL |
6cbf8214 RW |
715 | |
716 | #endif /* !CONFIG_PM_SLEEP */ | |
717 | ||
bbb44d9f RW |
718 | #ifdef CONFIG_SUSPEND |
719 | ||
720 | static int pci_pm_suspend(struct device *dev) | |
721 | { | |
722 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
8150f32b | 723 | const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; |
bbb44d9f | 724 | |
ad8cfa1d RW |
725 | if (pci_has_legacy_pm_support(pci_dev)) |
726 | return pci_legacy_suspend(dev, PMSG_SUSPEND); | |
bb808945 | 727 | |
5294e256 RW |
728 | if (!pm) { |
729 | pci_pm_default_suspend(pci_dev); | |
c4b65157 | 730 | return 0; |
5294e256 RW |
731 | } |
732 | ||
7cd0602d | 733 | /* |
c4b65157 RW |
734 | * PCI devices suspended at run time may need to be resumed at this |
735 | * point, because in general it may be necessary to reconfigure them for | |
736 | * system suspend. Namely, if the device is expected to wake up the | |
737 | * system from the sleep state, it may have to be reconfigured for this | |
738 | * purpose, or if the device is not expected to wake up the system from | |
739 | * the sleep state, it should be prevented from signaling wakeup events | |
740 | * going forward. | |
741 | * | |
742 | * Also if the driver of the device does not indicate that its system | |
743 | * suspend callbacks can cope with runtime-suspended devices, it is | |
744 | * better to resume the device from runtime suspend here. | |
7cd0602d | 745 | */ |
c4b65157 RW |
746 | if (!dev_pm_test_driver_flags(dev, DPM_FLAG_SMART_SUSPEND) || |
747 | !pci_dev_keep_suspended(pci_dev)) | |
748 | pm_runtime_resume(dev); | |
7cd0602d | 749 | |
82fee4d6 | 750 | pci_dev->state_saved = false; |
5294e256 RW |
751 | if (pm->suspend) { |
752 | pci_power_t prev = pci_dev->current_state; | |
753 | int error; | |
754 | ||
ddb7c9d2 RW |
755 | error = pm->suspend(dev); |
756 | suspend_report_result(pm->suspend, error); | |
5294e256 RW |
757 | if (error) |
758 | return error; | |
759 | ||
46939f8b | 760 | if (!pci_dev->state_saved && pci_dev->current_state != PCI_D0 |
5294e256 RW |
761 | && pci_dev->current_state != PCI_UNKNOWN) { |
762 | WARN_ONCE(pci_dev->current_state != prev, | |
763 | "PCI PM: State of device not saved by %pF\n", | |
764 | pm->suspend); | |
5294e256 | 765 | } |
bbb44d9f | 766 | } |
fa58d305 | 767 | |
5294e256 | 768 | return 0; |
bbb44d9f RW |
769 | } |
770 | ||
c4b65157 RW |
771 | static int pci_pm_suspend_late(struct device *dev) |
772 | { | |
773 | if (dev_pm_smart_suspend_and_suspended(dev)) | |
774 | return 0; | |
775 | ||
776 | pci_fixup_device(pci_fixup_suspend, to_pci_dev(dev)); | |
777 | ||
778 | return pm_generic_suspend_late(dev); | |
779 | } | |
780 | ||
bbb44d9f | 781 | static int pci_pm_suspend_noirq(struct device *dev) |
c8958177 | 782 | { |
355a72d7 | 783 | struct pci_dev *pci_dev = to_pci_dev(dev); |
8150f32b | 784 | const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; |
c8958177 | 785 | |
d7d80998 RW |
786 | if (dev_pm_smart_suspend_and_suspended(dev)) { |
787 | dev->power.may_skip_resume = true; | |
c4b65157 | 788 | return 0; |
d7d80998 | 789 | } |
c4b65157 | 790 | |
bb808945 RW |
791 | if (pci_has_legacy_pm_support(pci_dev)) |
792 | return pci_legacy_suspend_late(dev, PMSG_SUSPEND); | |
793 | ||
931ff68a RW |
794 | if (!pm) { |
795 | pci_save_state(pci_dev); | |
7d2a01b8 | 796 | goto Fixup; |
931ff68a | 797 | } |
46939f8b RW |
798 | |
799 | if (pm->suspend_noirq) { | |
800 | pci_power_t prev = pci_dev->current_state; | |
801 | int error; | |
802 | ||
803 | error = pm->suspend_noirq(dev); | |
804 | suspend_report_result(pm->suspend_noirq, error); | |
805 | if (error) | |
806 | return error; | |
807 | ||
808 | if (!pci_dev->state_saved && pci_dev->current_state != PCI_D0 | |
809 | && pci_dev->current_state != PCI_UNKNOWN) { | |
810 | WARN_ONCE(pci_dev->current_state != prev, | |
811 | "PCI PM: State of device not saved by %pF\n", | |
812 | pm->suspend_noirq); | |
7d2a01b8 | 813 | goto Fixup; |
46939f8b | 814 | } |
bbb44d9f RW |
815 | } |
816 | ||
46939f8b RW |
817 | if (!pci_dev->state_saved) { |
818 | pci_save_state(pci_dev); | |
9d26d3a8 | 819 | if (pci_power_manageable(pci_dev)) |
46939f8b RW |
820 | pci_prepare_to_sleep(pci_dev); |
821 | } | |
d67e37d7 | 822 | |
ca67ab5c RW |
823 | dev_dbg(dev, "PCI PM: Suspend power state: %s\n", |
824 | pci_power_name(pci_dev->current_state)); | |
825 | ||
46939f8b RW |
826 | pci_pm_set_unknown_state(pci_dev); |
827 | ||
dbf0e4c7 AS |
828 | /* |
829 | * Some BIOSes from ASUS have a bug: If a USB EHCI host controller's | |
830 | * PCI COMMAND register isn't 0, the BIOS assumes that the controller | |
831 | * hasn't been quiesced and tries to turn it off. If the controller | |
832 | * is already in D3, this can hang or cause memory corruption. | |
833 | * | |
834 | * Since the value of the COMMAND register doesn't matter once the | |
835 | * device has been suspended, we can safely set it to 0 here. | |
836 | */ | |
837 | if (pci_dev->class == PCI_CLASS_SERIAL_USB_EHCI) | |
838 | pci_write_config_word(pci_dev, PCI_COMMAND, 0); | |
839 | ||
7d2a01b8 AN |
840 | Fixup: |
841 | pci_fixup_device(pci_fixup_suspend_late, pci_dev); | |
842 | ||
d7d80998 RW |
843 | /* |
844 | * If the target system sleep state is suspend-to-idle, it is sufficient | |
845 | * to check whether or not the device's wakeup settings are good for | |
846 | * runtime PM. Otherwise, the pm_resume_via_firmware() check will cause | |
847 | * pci_pm_complete() to take care of fixing up the device's state | |
848 | * anyway, if need be. | |
849 | */ | |
850 | dev->power.may_skip_resume = device_may_wakeup(dev) || | |
851 | !device_can_wakeup(dev); | |
852 | ||
46939f8b | 853 | return 0; |
c8958177 | 854 | } |
1da177e4 | 855 | |
f6dc1e5e | 856 | static int pci_pm_resume_noirq(struct device *dev) |
bbb44d9f RW |
857 | { |
858 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
859 | struct device_driver *drv = dev->driver; | |
355a72d7 | 860 | int error = 0; |
bbb44d9f | 861 | |
d7d80998 RW |
862 | if (dev_pm_may_skip_resume(dev)) |
863 | return 0; | |
864 | ||
c4b65157 RW |
865 | /* |
866 | * Devices with DPM_FLAG_SMART_SUSPEND may be left in runtime suspend | |
867 | * during system suspend, so update their runtime PM status to "active" | |
868 | * as they are going to be put into D0 shortly. | |
869 | */ | |
870 | if (dev_pm_smart_suspend_and_suspended(dev)) | |
871 | pm_runtime_set_active(dev); | |
872 | ||
6cbf8214 | 873 | pci_pm_default_resume_early(pci_dev); |
aa8c6c93 | 874 | |
ad8cfa1d | 875 | if (pci_has_legacy_pm_support(pci_dev)) |
f6dc1e5e | 876 | return pci_legacy_resume_early(dev); |
bb808945 | 877 | |
f6dc1e5e RW |
878 | if (drv && drv->pm && drv->pm->resume_noirq) |
879 | error = drv->pm->resume_noirq(dev); | |
bbb44d9f RW |
880 | |
881 | return error; | |
882 | } | |
883 | ||
f6dc1e5e | 884 | static int pci_pm_resume(struct device *dev) |
bbb44d9f | 885 | { |
355a72d7 | 886 | struct pci_dev *pci_dev = to_pci_dev(dev); |
8150f32b | 887 | const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; |
bbb44d9f RW |
888 | int error = 0; |
889 | ||
418e4da3 RW |
890 | /* |
891 | * This is necessary for the suspend error path in which resume is | |
892 | * called without restoring the standard config registers of the device. | |
893 | */ | |
894 | if (pci_dev->state_saved) | |
895 | pci_restore_standard_config(pci_dev); | |
896 | ||
ad8cfa1d | 897 | if (pci_has_legacy_pm_support(pci_dev)) |
f6dc1e5e | 898 | return pci_legacy_resume(dev); |
bb808945 | 899 | |
5294e256 | 900 | pci_pm_default_resume(pci_dev); |
73410429 | 901 | |
5294e256 RW |
902 | if (pm) { |
903 | if (pm->resume) | |
904 | error = pm->resume(dev); | |
905 | } else { | |
906 | pci_pm_reenable_device(pci_dev); | |
907 | } | |
bbb44d9f | 908 | |
999cce4a | 909 | return error; |
bbb44d9f RW |
910 | } |
911 | ||
912 | #else /* !CONFIG_SUSPEND */ | |
913 | ||
914 | #define pci_pm_suspend NULL | |
c4b65157 | 915 | #define pci_pm_suspend_late NULL |
bbb44d9f RW |
916 | #define pci_pm_suspend_noirq NULL |
917 | #define pci_pm_resume NULL | |
918 | #define pci_pm_resume_noirq NULL | |
919 | ||
920 | #endif /* !CONFIG_SUSPEND */ | |
921 | ||
1f112cee | 922 | #ifdef CONFIG_HIBERNATE_CALLBACKS |
bbb44d9f | 923 | |
699c1985 SO |
924 | |
925 | /* | |
926 | * pcibios_pm_ops - provide arch-specific hooks when a PCI device is doing | |
927 | * a hibernate transition | |
928 | */ | |
929 | struct dev_pm_ops __weak pcibios_pm_ops; | |
930 | ||
bbb44d9f RW |
931 | static int pci_pm_freeze(struct device *dev) |
932 | { | |
933 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
8150f32b | 934 | const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; |
bbb44d9f | 935 | |
ad8cfa1d RW |
936 | if (pci_has_legacy_pm_support(pci_dev)) |
937 | return pci_legacy_suspend(dev, PMSG_FREEZE); | |
bb808945 | 938 | |
5294e256 RW |
939 | if (!pm) { |
940 | pci_pm_default_suspend(pci_dev); | |
941 | return 0; | |
bbb44d9f RW |
942 | } |
943 | ||
7cd0602d RW |
944 | /* |
945 | * This used to be done in pci_pm_prepare() for all devices and some | |
946 | * drivers may depend on it, so do it here. Ideally, runtime-suspended | |
947 | * devices should not be touched during freeze/thaw transitions, | |
948 | * however. | |
949 | */ | |
c4b65157 RW |
950 | if (!dev_pm_test_driver_flags(dev, DPM_FLAG_SMART_SUSPEND)) |
951 | pm_runtime_resume(dev); | |
7cd0602d | 952 | |
82fee4d6 | 953 | pci_dev->state_saved = false; |
5294e256 RW |
954 | if (pm->freeze) { |
955 | int error; | |
956 | ||
957 | error = pm->freeze(dev); | |
958 | suspend_report_result(pm->freeze, error); | |
959 | if (error) | |
960 | return error; | |
961 | } | |
962 | ||
5294e256 | 963 | return 0; |
bbb44d9f RW |
964 | } |
965 | ||
c4b65157 RW |
966 | static int pci_pm_freeze_late(struct device *dev) |
967 | { | |
968 | if (dev_pm_smart_suspend_and_suspended(dev)) | |
969 | return 0; | |
970 | ||
971 | return pm_generic_freeze_late(dev);; | |
972 | } | |
973 | ||
bbb44d9f RW |
974 | static int pci_pm_freeze_noirq(struct device *dev) |
975 | { | |
355a72d7 | 976 | struct pci_dev *pci_dev = to_pci_dev(dev); |
adf09493 | 977 | struct device_driver *drv = dev->driver; |
bbb44d9f | 978 | |
c4b65157 RW |
979 | if (dev_pm_smart_suspend_and_suspended(dev)) |
980 | return 0; | |
981 | ||
bb808945 RW |
982 | if (pci_has_legacy_pm_support(pci_dev)) |
983 | return pci_legacy_suspend_late(dev, PMSG_FREEZE); | |
984 | ||
d67e37d7 | 985 | if (drv && drv->pm && drv->pm->freeze_noirq) { |
46939f8b RW |
986 | int error; |
987 | ||
d67e37d7 RW |
988 | error = drv->pm->freeze_noirq(dev); |
989 | suspend_report_result(drv->pm->freeze_noirq, error); | |
46939f8b RW |
990 | if (error) |
991 | return error; | |
bbb44d9f RW |
992 | } |
993 | ||
46939f8b RW |
994 | if (!pci_dev->state_saved) |
995 | pci_save_state(pci_dev); | |
d67e37d7 | 996 | |
46939f8b RW |
997 | pci_pm_set_unknown_state(pci_dev); |
998 | ||
699c1985 SO |
999 | if (pcibios_pm_ops.freeze_noirq) |
1000 | return pcibios_pm_ops.freeze_noirq(dev); | |
1001 | ||
46939f8b | 1002 | return 0; |
bbb44d9f RW |
1003 | } |
1004 | ||
f6dc1e5e | 1005 | static int pci_pm_thaw_noirq(struct device *dev) |
bbb44d9f | 1006 | { |
355a72d7 | 1007 | struct pci_dev *pci_dev = to_pci_dev(dev); |
bbb44d9f RW |
1008 | struct device_driver *drv = dev->driver; |
1009 | int error = 0; | |
1010 | ||
c4b65157 RW |
1011 | /* |
1012 | * If the device is in runtime suspend, the code below may not work | |
1013 | * correctly with it, so skip that code and make the PM core skip all of | |
1014 | * the subsequent "thaw" callbacks for the device. | |
1015 | */ | |
1016 | if (dev_pm_smart_suspend_and_suspended(dev)) { | |
3487972d | 1017 | dev_pm_skip_next_resume_phases(dev); |
c4b65157 RW |
1018 | return 0; |
1019 | } | |
1020 | ||
699c1985 SO |
1021 | if (pcibios_pm_ops.thaw_noirq) { |
1022 | error = pcibios_pm_ops.thaw_noirq(dev); | |
1023 | if (error) | |
1024 | return error; | |
1025 | } | |
1026 | ||
ad8cfa1d | 1027 | if (pci_has_legacy_pm_support(pci_dev)) |
f6dc1e5e | 1028 | return pci_legacy_resume_early(dev); |
bb808945 | 1029 | |
5839ee73 RW |
1030 | /* |
1031 | * pci_restore_state() requires the device to be in D0 (because of MSI | |
1032 | * restoration among other things), so force it into D0 in case the | |
1033 | * driver's "freeze" callbacks put it into a low-power state directly. | |
1034 | */ | |
1035 | pci_set_power_state(pci_dev, PCI_D0); | |
e60514bd | 1036 | pci_restore_state(pci_dev); |
d67e37d7 | 1037 | |
f6dc1e5e RW |
1038 | if (drv && drv->pm && drv->pm->thaw_noirq) |
1039 | error = drv->pm->thaw_noirq(dev); | |
bbb44d9f RW |
1040 | |
1041 | return error; | |
1042 | } | |
1043 | ||
f6dc1e5e | 1044 | static int pci_pm_thaw(struct device *dev) |
bbb44d9f | 1045 | { |
355a72d7 | 1046 | struct pci_dev *pci_dev = to_pci_dev(dev); |
8150f32b | 1047 | const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; |
bbb44d9f RW |
1048 | int error = 0; |
1049 | ||
ad8cfa1d | 1050 | if (pci_has_legacy_pm_support(pci_dev)) |
f6dc1e5e | 1051 | return pci_legacy_resume(dev); |
bb808945 | 1052 | |
5294e256 RW |
1053 | if (pm) { |
1054 | if (pm->thaw) | |
1055 | error = pm->thaw(dev); | |
1056 | } else { | |
1057 | pci_pm_reenable_device(pci_dev); | |
1058 | } | |
bbb44d9f | 1059 | |
4b77b0a2 RW |
1060 | pci_dev->state_saved = false; |
1061 | ||
bbb44d9f RW |
1062 | return error; |
1063 | } | |
1064 | ||
1065 | static int pci_pm_poweroff(struct device *dev) | |
1066 | { | |
355a72d7 | 1067 | struct pci_dev *pci_dev = to_pci_dev(dev); |
8150f32b | 1068 | const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; |
bbb44d9f | 1069 | |
ad8cfa1d RW |
1070 | if (pci_has_legacy_pm_support(pci_dev)) |
1071 | return pci_legacy_suspend(dev, PMSG_HIBERNATE); | |
bb808945 | 1072 | |
5294e256 RW |
1073 | if (!pm) { |
1074 | pci_pm_default_suspend(pci_dev); | |
c4b65157 | 1075 | return 0; |
5294e256 RW |
1076 | } |
1077 | ||
7cd0602d | 1078 | /* The reason to do that is the same as in pci_pm_suspend(). */ |
c4b65157 RW |
1079 | if (!dev_pm_test_driver_flags(dev, DPM_FLAG_SMART_SUSPEND) || |
1080 | !pci_dev_keep_suspended(pci_dev)) | |
1081 | pm_runtime_resume(dev); | |
7cd0602d | 1082 | |
82fee4d6 | 1083 | pci_dev->state_saved = false; |
5294e256 | 1084 | if (pm->poweroff) { |
46939f8b RW |
1085 | int error; |
1086 | ||
ddb7c9d2 RW |
1087 | error = pm->poweroff(dev); |
1088 | suspend_report_result(pm->poweroff, error); | |
46939f8b RW |
1089 | if (error) |
1090 | return error; | |
bbb44d9f RW |
1091 | } |
1092 | ||
46939f8b | 1093 | return 0; |
bbb44d9f | 1094 | } |
c9b9972b | 1095 | |
c4b65157 RW |
1096 | static int pci_pm_poweroff_late(struct device *dev) |
1097 | { | |
1098 | if (dev_pm_smart_suspend_and_suspended(dev)) | |
1099 | return 0; | |
699c1985 | 1100 | |
c4b65157 RW |
1101 | pci_fixup_device(pci_fixup_suspend, to_pci_dev(dev)); |
1102 | ||
1103 | return pm_generic_poweroff_late(dev); | |
bbb44d9f RW |
1104 | } |
1105 | ||
1106 | static int pci_pm_poweroff_noirq(struct device *dev) | |
1107 | { | |
46939f8b | 1108 | struct pci_dev *pci_dev = to_pci_dev(dev); |
adf09493 | 1109 | struct device_driver *drv = dev->driver; |
bbb44d9f | 1110 | |
c4b65157 RW |
1111 | if (dev_pm_smart_suspend_and_suspended(dev)) |
1112 | return 0; | |
1113 | ||
bb808945 RW |
1114 | if (pci_has_legacy_pm_support(to_pci_dev(dev))) |
1115 | return pci_legacy_suspend_late(dev, PMSG_HIBERNATE); | |
1116 | ||
7d2a01b8 AN |
1117 | if (!drv || !drv->pm) { |
1118 | pci_fixup_device(pci_fixup_suspend_late, pci_dev); | |
46939f8b | 1119 | return 0; |
7d2a01b8 | 1120 | } |
46939f8b RW |
1121 | |
1122 | if (drv->pm->poweroff_noirq) { | |
1123 | int error; | |
1124 | ||
d67e37d7 RW |
1125 | error = drv->pm->poweroff_noirq(dev); |
1126 | suspend_report_result(drv->pm->poweroff_noirq, error); | |
46939f8b RW |
1127 | if (error) |
1128 | return error; | |
bbb44d9f RW |
1129 | } |
1130 | ||
326c1cda | 1131 | if (!pci_dev->state_saved && !pci_has_subordinate(pci_dev)) |
46939f8b RW |
1132 | pci_prepare_to_sleep(pci_dev); |
1133 | ||
0b68c8e2 RW |
1134 | /* |
1135 | * The reason for doing this here is the same as for the analogous code | |
1136 | * in pci_pm_suspend_noirq(). | |
1137 | */ | |
1138 | if (pci_dev->class == PCI_CLASS_SERIAL_USB_EHCI) | |
1139 | pci_write_config_word(pci_dev, PCI_COMMAND, 0); | |
1140 | ||
7d2a01b8 AN |
1141 | pci_fixup_device(pci_fixup_suspend_late, pci_dev); |
1142 | ||
699c1985 SO |
1143 | if (pcibios_pm_ops.poweroff_noirq) |
1144 | return pcibios_pm_ops.poweroff_noirq(dev); | |
1145 | ||
46939f8b | 1146 | return 0; |
bbb44d9f RW |
1147 | } |
1148 | ||
f6dc1e5e | 1149 | static int pci_pm_restore_noirq(struct device *dev) |
bbb44d9f RW |
1150 | { |
1151 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
1152 | struct device_driver *drv = dev->driver; | |
355a72d7 | 1153 | int error = 0; |
bbb44d9f | 1154 | |
c4b65157 RW |
1155 | /* This is analogous to the pci_pm_resume_noirq() case. */ |
1156 | if (dev_pm_smart_suspend_and_suspended(dev)) | |
1157 | pm_runtime_set_active(dev); | |
1158 | ||
699c1985 SO |
1159 | if (pcibios_pm_ops.restore_noirq) { |
1160 | error = pcibios_pm_ops.restore_noirq(dev); | |
1161 | if (error) | |
1162 | return error; | |
1163 | } | |
1164 | ||
6cbf8214 | 1165 | pci_pm_default_resume_early(pci_dev); |
aa8c6c93 | 1166 | |
ad8cfa1d | 1167 | if (pci_has_legacy_pm_support(pci_dev)) |
f6dc1e5e | 1168 | return pci_legacy_resume_early(dev); |
bb808945 | 1169 | |
f6dc1e5e RW |
1170 | if (drv && drv->pm && drv->pm->restore_noirq) |
1171 | error = drv->pm->restore_noirq(dev); | |
bbb44d9f RW |
1172 | |
1173 | return error; | |
1174 | } | |
1175 | ||
f6dc1e5e | 1176 | static int pci_pm_restore(struct device *dev) |
bbb44d9f RW |
1177 | { |
1178 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
8150f32b | 1179 | const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; |
bbb44d9f RW |
1180 | int error = 0; |
1181 | ||
418e4da3 RW |
1182 | /* |
1183 | * This is necessary for the hibernation error path in which restore is | |
1184 | * called without restoring the standard config registers of the device. | |
1185 | */ | |
1186 | if (pci_dev->state_saved) | |
1187 | pci_restore_standard_config(pci_dev); | |
1188 | ||
ad8cfa1d | 1189 | if (pci_has_legacy_pm_support(pci_dev)) |
f6dc1e5e | 1190 | return pci_legacy_resume(dev); |
bb808945 | 1191 | |
5294e256 | 1192 | pci_pm_default_resume(pci_dev); |
73410429 | 1193 | |
5294e256 RW |
1194 | if (pm) { |
1195 | if (pm->restore) | |
1196 | error = pm->restore(dev); | |
1197 | } else { | |
1198 | pci_pm_reenable_device(pci_dev); | |
1199 | } | |
bbb44d9f RW |
1200 | |
1201 | return error; | |
c8958177 | 1202 | } |
1da177e4 | 1203 | |
1f112cee | 1204 | #else /* !CONFIG_HIBERNATE_CALLBACKS */ |
bbb44d9f RW |
1205 | |
1206 | #define pci_pm_freeze NULL | |
c4b65157 | 1207 | #define pci_pm_freeze_late NULL |
bbb44d9f RW |
1208 | #define pci_pm_freeze_noirq NULL |
1209 | #define pci_pm_thaw NULL | |
1210 | #define pci_pm_thaw_noirq NULL | |
1211 | #define pci_pm_poweroff NULL | |
c4b65157 | 1212 | #define pci_pm_poweroff_late NULL |
bbb44d9f RW |
1213 | #define pci_pm_poweroff_noirq NULL |
1214 | #define pci_pm_restore NULL | |
1215 | #define pci_pm_restore_noirq NULL | |
1216 | ||
1f112cee | 1217 | #endif /* !CONFIG_HIBERNATE_CALLBACKS */ |
bbb44d9f | 1218 | |
fbb988be | 1219 | #ifdef CONFIG_PM |
6cbf8214 RW |
1220 | |
1221 | static int pci_pm_runtime_suspend(struct device *dev) | |
1222 | { | |
1223 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
1224 | const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; | |
1225 | pci_power_t prev = pci_dev->current_state; | |
1226 | int error; | |
1227 | ||
967577b0 HY |
1228 | /* |
1229 | * If pci_dev->driver is not set (unbound), the device should | |
1230 | * always remain in D0 regardless of the runtime PM status | |
1231 | */ | |
1232 | if (!pci_dev->driver) | |
1233 | return 0; | |
1234 | ||
6cbf8214 RW |
1235 | if (!pm || !pm->runtime_suspend) |
1236 | return -ENOSYS; | |
1237 | ||
82fee4d6 | 1238 | pci_dev->state_saved = false; |
6cbf8214 | 1239 | error = pm->runtime_suspend(dev); |
06bf403d ID |
1240 | if (error) { |
1241 | /* | |
1242 | * -EBUSY and -EAGAIN is used to request the runtime PM core | |
1243 | * to schedule a new suspend, so log the event only with debug | |
1244 | * log level. | |
1245 | */ | |
1246 | if (error == -EBUSY || error == -EAGAIN) | |
1247 | dev_dbg(dev, "can't suspend now (%pf returned %d)\n", | |
1248 | pm->runtime_suspend, error); | |
1249 | else | |
1250 | dev_err(dev, "can't suspend (%pf returned %d)\n", | |
1251 | pm->runtime_suspend, error); | |
1252 | ||
6cbf8214 | 1253 | return error; |
06bf403d | 1254 | } |
6cbf8214 RW |
1255 | |
1256 | pci_fixup_device(pci_fixup_suspend, pci_dev); | |
1257 | ||
1258 | if (!pci_dev->state_saved && pci_dev->current_state != PCI_D0 | |
1259 | && pci_dev->current_state != PCI_UNKNOWN) { | |
1260 | WARN_ONCE(pci_dev->current_state != prev, | |
1261 | "PCI PM: State of device not saved by %pF\n", | |
1262 | pm->runtime_suspend); | |
1263 | return 0; | |
1264 | } | |
1265 | ||
42eca230 | 1266 | if (!pci_dev->state_saved) { |
6cbf8214 | 1267 | pci_save_state(pci_dev); |
42eca230 DA |
1268 | pci_finish_runtime_suspend(pci_dev); |
1269 | } | |
6cbf8214 RW |
1270 | |
1271 | return 0; | |
1272 | } | |
1273 | ||
1274 | static int pci_pm_runtime_resume(struct device *dev) | |
1275 | { | |
448bd857 | 1276 | int rc; |
6cbf8214 RW |
1277 | struct pci_dev *pci_dev = to_pci_dev(dev); |
1278 | const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; | |
1279 | ||
967577b0 HY |
1280 | /* |
1281 | * If pci_dev->driver is not set (unbound), the device should | |
1282 | * always remain in D0 regardless of the runtime PM status | |
1283 | */ | |
1284 | if (!pci_dev->driver) | |
1285 | return 0; | |
1286 | ||
6cbf8214 RW |
1287 | if (!pm || !pm->runtime_resume) |
1288 | return -ENOSYS; | |
1289 | ||
db288c9c RW |
1290 | pci_restore_standard_config(pci_dev); |
1291 | pci_fixup_device(pci_fixup_resume_early, pci_dev); | |
0847684c | 1292 | pci_enable_wake(pci_dev, PCI_D0, false); |
6cbf8214 RW |
1293 | pci_fixup_device(pci_fixup_resume, pci_dev); |
1294 | ||
448bd857 HY |
1295 | rc = pm->runtime_resume(dev); |
1296 | ||
1297 | pci_dev->runtime_d3cold = false; | |
1298 | ||
1299 | return rc; | |
6cbf8214 RW |
1300 | } |
1301 | ||
1302 | static int pci_pm_runtime_idle(struct device *dev) | |
1303 | { | |
967577b0 | 1304 | struct pci_dev *pci_dev = to_pci_dev(dev); |
6cbf8214 | 1305 | const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; |
45f0a85c | 1306 | int ret = 0; |
6cbf8214 | 1307 | |
967577b0 HY |
1308 | /* |
1309 | * If pci_dev->driver is not set (unbound), the device should | |
1310 | * always remain in D0 regardless of the runtime PM status | |
1311 | */ | |
1312 | if (!pci_dev->driver) | |
45f0a85c | 1313 | return 0; |
967577b0 | 1314 | |
6cbf8214 RW |
1315 | if (!pm) |
1316 | return -ENOSYS; | |
1317 | ||
45f0a85c RW |
1318 | if (pm->runtime_idle) |
1319 | ret = pm->runtime_idle(dev); | |
6cbf8214 | 1320 | |
45f0a85c | 1321 | return ret; |
6cbf8214 RW |
1322 | } |
1323 | ||
f91da04d | 1324 | static const struct dev_pm_ops pci_dev_pm_ops = { |
adf09493 | 1325 | .prepare = pci_pm_prepare, |
2cef548a | 1326 | .complete = pci_pm_complete, |
adf09493 | 1327 | .suspend = pci_pm_suspend, |
c4b65157 | 1328 | .suspend_late = pci_pm_suspend_late, |
adf09493 RW |
1329 | .resume = pci_pm_resume, |
1330 | .freeze = pci_pm_freeze, | |
c4b65157 | 1331 | .freeze_late = pci_pm_freeze_late, |
adf09493 RW |
1332 | .thaw = pci_pm_thaw, |
1333 | .poweroff = pci_pm_poweroff, | |
c4b65157 | 1334 | .poweroff_late = pci_pm_poweroff_late, |
adf09493 | 1335 | .restore = pci_pm_restore, |
bbb44d9f RW |
1336 | .suspend_noirq = pci_pm_suspend_noirq, |
1337 | .resume_noirq = pci_pm_resume_noirq, | |
1338 | .freeze_noirq = pci_pm_freeze_noirq, | |
1339 | .thaw_noirq = pci_pm_thaw_noirq, | |
1340 | .poweroff_noirq = pci_pm_poweroff_noirq, | |
1341 | .restore_noirq = pci_pm_restore_noirq, | |
6cbf8214 RW |
1342 | .runtime_suspend = pci_pm_runtime_suspend, |
1343 | .runtime_resume = pci_pm_runtime_resume, | |
1344 | .runtime_idle = pci_pm_runtime_idle, | |
bbb44d9f RW |
1345 | }; |
1346 | ||
adf09493 | 1347 | #define PCI_PM_OPS_PTR (&pci_dev_pm_ops) |
bbb44d9f | 1348 | |
fbb988be RW |
1349 | #else /* !CONFIG_PM */ |
1350 | ||
1351 | #define pci_pm_runtime_suspend NULL | |
1352 | #define pci_pm_runtime_resume NULL | |
1353 | #define pci_pm_runtime_idle NULL | |
bbb44d9f RW |
1354 | |
1355 | #define PCI_PM_OPS_PTR NULL | |
1356 | ||
fbb988be | 1357 | #endif /* !CONFIG_PM */ |
bbb44d9f | 1358 | |
1da177e4 | 1359 | /** |
863b18f4 | 1360 | * __pci_register_driver - register a new pci driver |
1da177e4 | 1361 | * @drv: the driver structure to register |
863b18f4 | 1362 | * @owner: owner module of drv |
f95d882d | 1363 | * @mod_name: module name string |
f7625980 | 1364 | * |
1da177e4 | 1365 | * Adds the driver structure to the list of registered drivers. |
f7625980 BH |
1366 | * Returns a negative value on error, otherwise 0. |
1367 | * If no error occurred, the driver remains registered even if | |
1da177e4 LT |
1368 | * no device was claimed during registration. |
1369 | */ | |
725522b5 GKH |
1370 | int __pci_register_driver(struct pci_driver *drv, struct module *owner, |
1371 | const char *mod_name) | |
1da177e4 | 1372 | { |
1da177e4 LT |
1373 | /* initialize common driver fields */ |
1374 | drv->driver.name = drv->name; | |
1375 | drv->driver.bus = &pci_bus_type; | |
863b18f4 | 1376 | drv->driver.owner = owner; |
725522b5 | 1377 | drv->driver.mod_name = mod_name; |
92d50fc1 | 1378 | drv->driver.groups = drv->groups; |
50b00755 | 1379 | |
75865858 GKH |
1380 | spin_lock_init(&drv->dynids.lock); |
1381 | INIT_LIST_HEAD(&drv->dynids.list); | |
1da177e4 LT |
1382 | |
1383 | /* register with core */ | |
bfb09a86 | 1384 | return driver_register(&drv->driver); |
1da177e4 | 1385 | } |
b7fe9434 | 1386 | EXPORT_SYMBOL(__pci_register_driver); |
1da177e4 LT |
1387 | |
1388 | /** | |
1389 | * pci_unregister_driver - unregister a pci driver | |
1390 | * @drv: the driver structure to unregister | |
f7625980 | 1391 | * |
1da177e4 LT |
1392 | * Deletes the driver structure from the list of registered PCI drivers, |
1393 | * gives it a chance to clean up by calling its remove() function for | |
1394 | * each device it was responsible for, and marks those devices as | |
1395 | * driverless. | |
1396 | */ | |
1397 | ||
3c78bc61 | 1398 | void pci_unregister_driver(struct pci_driver *drv) |
1da177e4 LT |
1399 | { |
1400 | driver_unregister(&drv->driver); | |
1401 | pci_free_dynids(drv); | |
1402 | } | |
b7fe9434 | 1403 | EXPORT_SYMBOL(pci_unregister_driver); |
1da177e4 LT |
1404 | |
1405 | static struct pci_driver pci_compat_driver = { | |
1406 | .name = "compat" | |
1407 | }; | |
1408 | ||
1409 | /** | |
1410 | * pci_dev_driver - get the pci_driver of a device | |
1411 | * @dev: the device to query | |
1412 | * | |
f7625980 | 1413 | * Returns the appropriate pci_driver structure or %NULL if there is no |
1da177e4 LT |
1414 | * registered driver for the device. |
1415 | */ | |
3c78bc61 | 1416 | struct pci_driver *pci_dev_driver(const struct pci_dev *dev) |
1da177e4 LT |
1417 | { |
1418 | if (dev->driver) | |
1419 | return dev->driver; | |
1420 | else { | |
1421 | int i; | |
3c78bc61 | 1422 | for (i = 0; i <= PCI_ROM_RESOURCE; i++) |
1da177e4 LT |
1423 | if (dev->resource[i].flags & IORESOURCE_BUSY) |
1424 | return &pci_compat_driver; | |
1425 | } | |
1426 | return NULL; | |
1427 | } | |
b7fe9434 | 1428 | EXPORT_SYMBOL(pci_dev_driver); |
1da177e4 LT |
1429 | |
1430 | /** | |
1431 | * pci_bus_match - Tell if a PCI device structure has a matching PCI device id structure | |
1da177e4 | 1432 | * @dev: the PCI device structure to match against |
8f7020d3 | 1433 | * @drv: the device driver to search for matching PCI device id structures |
f7625980 | 1434 | * |
1da177e4 | 1435 | * Used by a driver to check whether a PCI device present in the |
8f7020d3 | 1436 | * system is in its list of supported devices. Returns the matching |
1da177e4 LT |
1437 | * pci_device_id structure or %NULL if there is no match. |
1438 | */ | |
75865858 | 1439 | static int pci_bus_match(struct device *dev, struct device_driver *drv) |
1da177e4 | 1440 | { |
75865858 | 1441 | struct pci_dev *pci_dev = to_pci_dev(dev); |
58d9a38f | 1442 | struct pci_driver *pci_drv; |
1da177e4 LT |
1443 | const struct pci_device_id *found_id; |
1444 | ||
58d9a38f YL |
1445 | if (!pci_dev->match_driver) |
1446 | return 0; | |
1447 | ||
1448 | pci_drv = to_pci_driver(drv); | |
75865858 | 1449 | found_id = pci_match_device(pci_drv, pci_dev); |
1da177e4 LT |
1450 | if (found_id) |
1451 | return 1; | |
1452 | ||
75865858 | 1453 | return 0; |
1da177e4 LT |
1454 | } |
1455 | ||
1456 | /** | |
1457 | * pci_dev_get - increments the reference count of the pci device structure | |
1458 | * @dev: the device being referenced | |
1459 | * | |
1460 | * Each live reference to a device should be refcounted. | |
1461 | * | |
1462 | * Drivers for PCI devices should normally record such references in | |
1463 | * their probe() methods, when they bind to a device, and release | |
1464 | * them by calling pci_dev_put(), in their disconnect() methods. | |
1465 | * | |
1466 | * A pointer to the device with the incremented reference counter is returned. | |
1467 | */ | |
1468 | struct pci_dev *pci_dev_get(struct pci_dev *dev) | |
1469 | { | |
1470 | if (dev) | |
1471 | get_device(&dev->dev); | |
1472 | return dev; | |
1473 | } | |
b7fe9434 | 1474 | EXPORT_SYMBOL(pci_dev_get); |
1da177e4 LT |
1475 | |
1476 | /** | |
1477 | * pci_dev_put - release a use of the pci device structure | |
1478 | * @dev: device that's been disconnected | |
1479 | * | |
1480 | * Must be called when a user of a device is finished with it. When the last | |
1481 | * user of the device calls this function, the memory of the device is freed. | |
1482 | */ | |
1483 | void pci_dev_put(struct pci_dev *dev) | |
1484 | { | |
1485 | if (dev) | |
1486 | put_device(&dev->dev); | |
1487 | } | |
b7fe9434 | 1488 | EXPORT_SYMBOL(pci_dev_put); |
1da177e4 | 1489 | |
8ccc9aa1 BP |
1490 | static int pci_uevent(struct device *dev, struct kobj_uevent_env *env) |
1491 | { | |
1492 | struct pci_dev *pdev; | |
1493 | ||
1494 | if (!dev) | |
1495 | return -ENODEV; | |
1496 | ||
1497 | pdev = to_pci_dev(dev); | |
8ccc9aa1 BP |
1498 | |
1499 | if (add_uevent_var(env, "PCI_CLASS=%04X", pdev->class)) | |
1500 | return -ENOMEM; | |
1501 | ||
1502 | if (add_uevent_var(env, "PCI_ID=%04X:%04X", pdev->vendor, pdev->device)) | |
1503 | return -ENOMEM; | |
1504 | ||
1505 | if (add_uevent_var(env, "PCI_SUBSYS_ID=%04X:%04X", pdev->subsystem_vendor, | |
1506 | pdev->subsystem_device)) | |
1507 | return -ENOMEM; | |
1508 | ||
1509 | if (add_uevent_var(env, "PCI_SLOT_NAME=%s", pci_name(pdev))) | |
1510 | return -ENOMEM; | |
1511 | ||
145b3fe5 | 1512 | if (add_uevent_var(env, "MODALIAS=pci:v%08Xd%08Xsv%08Xsd%08Xbc%02Xsc%02Xi%02X", |
8ccc9aa1 BP |
1513 | pdev->vendor, pdev->device, |
1514 | pdev->subsystem_vendor, pdev->subsystem_device, | |
1515 | (u8)(pdev->class >> 16), (u8)(pdev->class >> 8), | |
1516 | (u8)(pdev->class))) | |
1517 | return -ENOMEM; | |
efdd4070 | 1518 | |
8ccc9aa1 BP |
1519 | return 0; |
1520 | } | |
1521 | ||
02e0bea6 PS |
1522 | static int pci_bus_num_vf(struct device *dev) |
1523 | { | |
1524 | return pci_num_vf(to_pci_dev(dev)); | |
1525 | } | |
1526 | ||
1da177e4 LT |
1527 | struct bus_type pci_bus_type = { |
1528 | .name = "pci", | |
1529 | .match = pci_bus_match, | |
312c004d | 1530 | .uevent = pci_uevent, |
b15d686a RK |
1531 | .probe = pci_device_probe, |
1532 | .remove = pci_device_remove, | |
cbd69dbb | 1533 | .shutdown = pci_device_shutdown, |
5136b2da | 1534 | .dev_groups = pci_dev_groups, |
0f49ba55 | 1535 | .bus_groups = pci_bus_groups, |
2229c1fb | 1536 | .drv_groups = pci_drv_groups, |
bbb44d9f | 1537 | .pm = PCI_PM_OPS_PTR, |
02e0bea6 | 1538 | .num_vf = pci_bus_num_vf, |
d89e2378 | 1539 | .force_dma = true, |
1da177e4 | 1540 | }; |
b7fe9434 | 1541 | EXPORT_SYMBOL(pci_bus_type); |
1da177e4 LT |
1542 | |
1543 | static int __init pci_driver_init(void) | |
1544 | { | |
1545 | return bus_register(&pci_bus_type); | |
1546 | } | |
1da177e4 | 1547 | postcore_initcall(pci_driver_init); |