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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> |
1da177e4 LT |
22 | #include "pci.h" |
23 | ||
75865858 GKH |
24 | struct pci_dynid { |
25 | struct list_head node; | |
26 | struct pci_device_id id; | |
27 | }; | |
1da177e4 | 28 | |
9dba910e TH |
29 | /** |
30 | * pci_add_dynid - add a new PCI device ID to this driver and re-probe devices | |
31 | * @drv: target pci driver | |
32 | * @vendor: PCI vendor ID | |
33 | * @device: PCI device ID | |
34 | * @subvendor: PCI subvendor ID | |
35 | * @subdevice: PCI subdevice ID | |
36 | * @class: PCI class | |
37 | * @class_mask: PCI class mask | |
38 | * @driver_data: private driver data | |
39 | * | |
40 | * Adds a new dynamic pci device ID to this driver and causes the | |
41 | * driver to probe for all devices again. @drv must have been | |
42 | * registered prior to calling this function. | |
43 | * | |
44 | * CONTEXT: | |
45 | * Does GFP_KERNEL allocation. | |
46 | * | |
47 | * RETURNS: | |
48 | * 0 on success, -errno on failure. | |
49 | */ | |
50 | int pci_add_dynid(struct pci_driver *drv, | |
51 | unsigned int vendor, unsigned int device, | |
52 | unsigned int subvendor, unsigned int subdevice, | |
53 | unsigned int class, unsigned int class_mask, | |
54 | unsigned long driver_data) | |
55 | { | |
56 | struct pci_dynid *dynid; | |
57 | int retval; | |
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 | ||
9dba910e | 75 | retval = driver_attach(&drv->driver); |
9dba910e TH |
76 | |
77 | return retval; | |
78 | } | |
79 | ||
80 | static void pci_free_dynids(struct pci_driver *drv) | |
81 | { | |
82 | struct pci_dynid *dynid, *n; | |
3d3c2ae1 | 83 | |
9dba910e TH |
84 | spin_lock(&drv->dynids.lock); |
85 | list_for_each_entry_safe(dynid, n, &drv->dynids.list, node) { | |
86 | list_del(&dynid->node); | |
87 | kfree(dynid); | |
88 | } | |
89 | spin_unlock(&drv->dynids.lock); | |
90 | } | |
91 | ||
1da177e4 | 92 | /** |
9dba910e | 93 | * store_new_id - sysfs frontend to pci_add_dynid() |
8f7020d3 RD |
94 | * @driver: target device driver |
95 | * @buf: buffer for scanning device ID data | |
96 | * @count: input size | |
1da177e4 | 97 | * |
9dba910e | 98 | * Allow PCI IDs to be added to an existing driver via sysfs. |
1da177e4 | 99 | */ |
f8eb1005 | 100 | static ssize_t |
1da177e4 LT |
101 | store_new_id(struct device_driver *driver, const char *buf, size_t count) |
102 | { | |
1da177e4 | 103 | struct pci_driver *pdrv = to_pci_driver(driver); |
b41d6cf3 | 104 | const struct pci_device_id *ids = pdrv->id_table; |
6ba18636 | 105 | __u32 vendor, device, subvendor=PCI_ANY_ID, |
1da177e4 LT |
106 | subdevice=PCI_ANY_ID, class=0, class_mask=0; |
107 | unsigned long driver_data=0; | |
108 | int fields=0; | |
9dba910e | 109 | int retval; |
1da177e4 | 110 | |
b41d6cf3 | 111 | fields = sscanf(buf, "%x %x %x %x %x %x %lx", |
1da177e4 LT |
112 | &vendor, &device, &subvendor, &subdevice, |
113 | &class, &class_mask, &driver_data); | |
6ba18636 | 114 | if (fields < 2) |
1da177e4 LT |
115 | return -EINVAL; |
116 | ||
b41d6cf3 JD |
117 | /* Only accept driver_data values that match an existing id_table |
118 | entry */ | |
2debb4d2 CW |
119 | if (ids) { |
120 | retval = -EINVAL; | |
121 | while (ids->vendor || ids->subvendor || ids->class_mask) { | |
122 | if (driver_data == ids->driver_data) { | |
123 | retval = 0; | |
124 | break; | |
125 | } | |
126 | ids++; | |
b41d6cf3 | 127 | } |
2debb4d2 CW |
128 | if (retval) /* No match */ |
129 | return retval; | |
b41d6cf3 | 130 | } |
b41d6cf3 | 131 | |
9dba910e TH |
132 | retval = pci_add_dynid(pdrv, vendor, device, subvendor, subdevice, |
133 | class, class_mask, driver_data); | |
b19441af GKH |
134 | if (retval) |
135 | return retval; | |
1da177e4 LT |
136 | return count; |
137 | } | |
1da177e4 | 138 | |
0994375e CW |
139 | /** |
140 | * store_remove_id - remove a PCI device ID from this driver | |
141 | * @driver: target device driver | |
142 | * @buf: buffer for scanning device ID data | |
143 | * @count: input size | |
144 | * | |
145 | * Removes a dynamic pci device ID to this driver. | |
146 | */ | |
147 | static ssize_t | |
148 | store_remove_id(struct device_driver *driver, const char *buf, size_t count) | |
149 | { | |
150 | struct pci_dynid *dynid, *n; | |
151 | struct pci_driver *pdrv = to_pci_driver(driver); | |
152 | __u32 vendor, device, subvendor = PCI_ANY_ID, | |
153 | subdevice = PCI_ANY_ID, class = 0, class_mask = 0; | |
154 | int fields = 0; | |
155 | int retval = -ENODEV; | |
156 | ||
157 | fields = sscanf(buf, "%x %x %x %x %x %x", | |
158 | &vendor, &device, &subvendor, &subdevice, | |
159 | &class, &class_mask); | |
160 | if (fields < 2) | |
161 | return -EINVAL; | |
162 | ||
163 | spin_lock(&pdrv->dynids.lock); | |
164 | list_for_each_entry_safe(dynid, n, &pdrv->dynids.list, node) { | |
165 | struct pci_device_id *id = &dynid->id; | |
166 | if ((id->vendor == vendor) && | |
167 | (id->device == device) && | |
168 | (subvendor == PCI_ANY_ID || id->subvendor == subvendor) && | |
169 | (subdevice == PCI_ANY_ID || id->subdevice == subdevice) && | |
170 | !((id->class ^ class) & class_mask)) { | |
171 | list_del(&dynid->node); | |
172 | kfree(dynid); | |
173 | retval = 0; | |
174 | break; | |
175 | } | |
176 | } | |
177 | spin_unlock(&pdrv->dynids.lock); | |
178 | ||
179 | if (retval) | |
180 | return retval; | |
181 | return count; | |
182 | } | |
0994375e | 183 | |
bfb09a86 KK |
184 | static struct driver_attribute pci_drv_attrs[] = { |
185 | __ATTR(new_id, S_IWUSR, NULL, store_new_id), | |
186 | __ATTR(remove_id, S_IWUSR, NULL, store_remove_id), | |
187 | __ATTR_NULL, | |
188 | }; | |
0994375e | 189 | |
1da177e4 | 190 | /** |
75865858 | 191 | * pci_match_id - See if a pci device matches a given pci_id table |
1da177e4 | 192 | * @ids: array of PCI device id structures to search in |
75865858 GKH |
193 | * @dev: the PCI device structure to match against. |
194 | * | |
1da177e4 | 195 | * Used by a driver to check whether a PCI device present in the |
75865858 | 196 | * system is in its list of supported devices. Returns the matching |
1da177e4 | 197 | * pci_device_id structure or %NULL if there is no match. |
75865858 | 198 | * |
8b60756a | 199 | * Deprecated, don't use this as it will not catch any dynamic ids |
75865858 | 200 | * that a driver might want to check for. |
1da177e4 | 201 | */ |
75865858 GKH |
202 | const struct pci_device_id *pci_match_id(const struct pci_device_id *ids, |
203 | struct pci_dev *dev) | |
1da177e4 | 204 | { |
75865858 GKH |
205 | if (ids) { |
206 | while (ids->vendor || ids->subvendor || ids->class_mask) { | |
207 | if (pci_match_one_device(ids, dev)) | |
208 | return ids; | |
209 | ids++; | |
210 | } | |
1da177e4 LT |
211 | } |
212 | return NULL; | |
213 | } | |
214 | ||
215 | /** | |
ae9608af | 216 | * pci_match_device - Tell if a PCI device structure has a matching PCI device id structure |
75865858 | 217 | * @drv: the PCI driver to match against |
39ba487f | 218 | * @dev: the PCI device structure to match against |
75865858 GKH |
219 | * |
220 | * Used by a driver to check whether a PCI device present in the | |
221 | * system is in its list of supported devices. Returns the matching | |
222 | * pci_device_id structure or %NULL if there is no match. | |
1da177e4 | 223 | */ |
d73460d7 AB |
224 | static const struct pci_device_id *pci_match_device(struct pci_driver *drv, |
225 | struct pci_dev *dev) | |
75865858 | 226 | { |
75865858 | 227 | struct pci_dynid *dynid; |
1da177e4 | 228 | |
7461b60a | 229 | /* Look at the dynamic ids first, before the static ones */ |
75865858 GKH |
230 | spin_lock(&drv->dynids.lock); |
231 | list_for_each_entry(dynid, &drv->dynids.list, node) { | |
232 | if (pci_match_one_device(&dynid->id, dev)) { | |
233 | spin_unlock(&drv->dynids.lock); | |
234 | return &dynid->id; | |
235 | } | |
1da177e4 | 236 | } |
75865858 | 237 | spin_unlock(&drv->dynids.lock); |
7461b60a RK |
238 | |
239 | return pci_match_id(drv->id_table, dev); | |
1da177e4 LT |
240 | } |
241 | ||
873392ca RR |
242 | struct drv_dev_and_id { |
243 | struct pci_driver *drv; | |
244 | struct pci_dev *dev; | |
245 | const struct pci_device_id *id; | |
246 | }; | |
247 | ||
248 | static long local_pci_probe(void *_ddi) | |
249 | { | |
250 | struct drv_dev_and_id *ddi = _ddi; | |
967577b0 HY |
251 | struct pci_dev *pci_dev = ddi->dev; |
252 | struct pci_driver *pci_drv = ddi->drv; | |
253 | struct device *dev = &pci_dev->dev; | |
f3ec4f87 AS |
254 | int rc; |
255 | ||
967577b0 HY |
256 | /* |
257 | * Unbound PCI devices are always put in D0, regardless of | |
258 | * runtime PM status. During probe, the device is set to | |
259 | * active and the usage count is incremented. If the driver | |
260 | * supports runtime PM, it should call pm_runtime_put_noidle() | |
261 | * in its probe routine and pm_runtime_get_noresume() in its | |
262 | * remove routine. | |
f3ec4f87 | 263 | */ |
967577b0 HY |
264 | pm_runtime_get_sync(dev); |
265 | pci_dev->driver = pci_drv; | |
266 | rc = pci_drv->probe(pci_dev, ddi->id); | |
f3ec4f87 | 267 | if (rc) { |
967577b0 HY |
268 | pci_dev->driver = NULL; |
269 | pm_runtime_put_sync(dev); | |
f3ec4f87 AS |
270 | } |
271 | return rc; | |
873392ca RR |
272 | } |
273 | ||
d42c6997 AK |
274 | static int pci_call_probe(struct pci_driver *drv, struct pci_dev *dev, |
275 | const struct pci_device_id *id) | |
276 | { | |
873392ca RR |
277 | int error, node; |
278 | struct drv_dev_and_id ddi = { drv, dev, id }; | |
279 | ||
280 | /* Execute driver initialization on node where the device's | |
281 | bus is attached to. This way the driver likely allocates | |
282 | its local memory on the right node without any need to | |
283 | change it. */ | |
284 | node = dev_to_node(&dev->dev); | |
f70316da | 285 | if (node >= 0) { |
873392ca | 286 | int cpu; |
873392ca RR |
287 | |
288 | get_online_cpus(); | |
a70f7302 | 289 | cpu = cpumask_any_and(cpumask_of_node(node), cpu_online_mask); |
873392ca RR |
290 | if (cpu < nr_cpu_ids) |
291 | error = work_on_cpu(cpu, local_pci_probe, &ddi); | |
292 | else | |
293 | error = local_pci_probe(&ddi); | |
294 | put_online_cpus(); | |
295 | } else | |
296 | error = local_pci_probe(&ddi); | |
d42c6997 AK |
297 | return error; |
298 | } | |
299 | ||
1da177e4 | 300 | /** |
23ea3793 | 301 | * __pci_device_probe - check if a driver wants to claim a specific PCI device |
8f7020d3 RD |
302 | * @drv: driver to call to check if it wants the PCI device |
303 | * @pci_dev: PCI device being probed | |
1da177e4 | 304 | * |
8f7020d3 | 305 | * returns 0 on success, else error. |
1da177e4 LT |
306 | * side-effect: pci_dev->driver is set to drv when drv claims pci_dev. |
307 | */ | |
308 | static int | |
309 | __pci_device_probe(struct pci_driver *drv, struct pci_dev *pci_dev) | |
75865858 GKH |
310 | { |
311 | const struct pci_device_id *id; | |
1da177e4 LT |
312 | int error = 0; |
313 | ||
314 | if (!pci_dev->driver && drv->probe) { | |
75865858 GKH |
315 | error = -ENODEV; |
316 | ||
317 | id = pci_match_device(drv, pci_dev); | |
318 | if (id) | |
d42c6997 | 319 | error = pci_call_probe(drv, pci_dev, id); |
967577b0 | 320 | if (error >= 0) |
75865858 | 321 | error = 0; |
1da177e4 LT |
322 | } |
323 | return error; | |
324 | } | |
325 | ||
326 | static int pci_device_probe(struct device * dev) | |
327 | { | |
328 | int error = 0; | |
329 | struct pci_driver *drv; | |
330 | struct pci_dev *pci_dev; | |
331 | ||
332 | drv = to_pci_driver(dev->driver); | |
333 | pci_dev = to_pci_dev(dev); | |
334 | pci_dev_get(pci_dev); | |
335 | error = __pci_device_probe(drv, pci_dev); | |
336 | if (error) | |
337 | pci_dev_put(pci_dev); | |
338 | ||
339 | return error; | |
340 | } | |
341 | ||
342 | static int pci_device_remove(struct device * dev) | |
343 | { | |
344 | struct pci_dev * pci_dev = to_pci_dev(dev); | |
345 | struct pci_driver * drv = pci_dev->driver; | |
346 | ||
347 | if (drv) { | |
f3ec4f87 AS |
348 | if (drv->remove) { |
349 | pm_runtime_get_sync(dev); | |
1da177e4 | 350 | drv->remove(pci_dev); |
f3ec4f87 AS |
351 | pm_runtime_put_noidle(dev); |
352 | } | |
1da177e4 LT |
353 | pci_dev->driver = NULL; |
354 | } | |
355 | ||
f3ec4f87 | 356 | /* Undo the runtime PM settings in local_pci_probe() */ |
967577b0 | 357 | pm_runtime_put_sync(dev); |
f3ec4f87 | 358 | |
2449e06a SL |
359 | /* |
360 | * If the device is still on, set the power state as "unknown", | |
361 | * since it might change by the next time we load the driver. | |
362 | */ | |
363 | if (pci_dev->current_state == PCI_D0) | |
364 | pci_dev->current_state = PCI_UNKNOWN; | |
365 | ||
1da177e4 LT |
366 | /* |
367 | * We would love to complain here if pci_dev->is_enabled is set, that | |
368 | * the driver should have called pci_disable_device(), but the | |
369 | * unfortunate fact is there are too many odd BIOS and bridge setups | |
370 | * that don't like drivers doing that all of the time. | |
371 | * Oh well, we can dream of sane hardware when we sleep, no matter how | |
372 | * horrible the crap we have to deal with is when we are awake... | |
373 | */ | |
374 | ||
375 | pci_dev_put(pci_dev); | |
376 | return 0; | |
377 | } | |
378 | ||
bbb44d9f RW |
379 | static void pci_device_shutdown(struct device *dev) |
380 | { | |
381 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
382 | struct pci_driver *drv = pci_dev->driver; | |
383 | ||
3ff2de9b HY |
384 | pm_runtime_resume(dev); |
385 | ||
bbb44d9f RW |
386 | if (drv && drv->shutdown) |
387 | drv->shutdown(pci_dev); | |
388 | pci_msi_shutdown(pci_dev); | |
389 | pci_msix_shutdown(pci_dev); | |
5b415f1e | 390 | |
b566a22c KA |
391 | /* |
392 | * Turn off Bus Master bit on the device to tell it to not | |
6e0eda3c | 393 | * continue to do DMA. Don't touch devices in D3cold or unknown states. |
b566a22c | 394 | */ |
6e0eda3c KK |
395 | if (pci_dev->current_state <= PCI_D3hot) |
396 | pci_clear_master(pci_dev); | |
bbb44d9f RW |
397 | } |
398 | ||
aa338601 | 399 | #ifdef CONFIG_PM |
6cbf8214 RW |
400 | |
401 | /* Auxiliary functions used for system resume and run-time resume. */ | |
402 | ||
403 | /** | |
404 | * pci_restore_standard_config - restore standard config registers of PCI device | |
405 | * @pci_dev: PCI device to handle | |
406 | */ | |
407 | static int pci_restore_standard_config(struct pci_dev *pci_dev) | |
408 | { | |
409 | pci_update_current_state(pci_dev, PCI_UNKNOWN); | |
410 | ||
411 | if (pci_dev->current_state != PCI_D0) { | |
412 | int error = pci_set_power_state(pci_dev, PCI_D0); | |
413 | if (error) | |
414 | return error; | |
415 | } | |
416 | ||
1d3c16a8 JM |
417 | pci_restore_state(pci_dev); |
418 | return 0; | |
6cbf8214 RW |
419 | } |
420 | ||
db288c9c RW |
421 | #endif |
422 | ||
423 | #ifdef CONFIG_PM_SLEEP | |
424 | ||
6cbf8214 RW |
425 | static void pci_pm_default_resume_early(struct pci_dev *pci_dev) |
426 | { | |
db288c9c RW |
427 | pci_power_up(pci_dev); |
428 | pci_restore_state(pci_dev); | |
6cbf8214 RW |
429 | pci_fixup_device(pci_fixup_resume_early, pci_dev); |
430 | } | |
431 | ||
fa58d305 RW |
432 | /* |
433 | * Default "suspend" method for devices that have no driver provided suspend, | |
434 | * or not even a driver at all (second part). | |
bbb44d9f | 435 | */ |
bb808945 | 436 | static void pci_pm_set_unknown_state(struct pci_dev *pci_dev) |
bbb44d9f | 437 | { |
bbb44d9f RW |
438 | /* |
439 | * mark its power state as "unknown", since we don't know if | |
440 | * e.g. the BIOS will change its device state when we suspend. | |
441 | */ | |
442 | if (pci_dev->current_state == PCI_D0) | |
443 | pci_dev->current_state = PCI_UNKNOWN; | |
444 | } | |
445 | ||
355a72d7 RW |
446 | /* |
447 | * Default "resume" method for devices that have no driver provided resume, | |
448 | * or not even a driver at all (second part). | |
449 | */ | |
bb808945 | 450 | static int pci_pm_reenable_device(struct pci_dev *pci_dev) |
355a72d7 RW |
451 | { |
452 | int retval; | |
453 | ||
bbb44d9f RW |
454 | /* if the device was enabled before suspend, reenable */ |
455 | retval = pci_reenable_device(pci_dev); | |
456 | /* | |
457 | * if the device was busmaster before the suspend, make it busmaster | |
458 | * again | |
459 | */ | |
460 | if (pci_dev->is_busmaster) | |
461 | pci_set_master(pci_dev); | |
462 | ||
463 | return retval; | |
464 | } | |
465 | ||
466 | static int pci_legacy_suspend(struct device *dev, pm_message_t state) | |
1da177e4 LT |
467 | { |
468 | struct pci_dev * pci_dev = to_pci_dev(dev); | |
469 | struct pci_driver * drv = pci_dev->driver; | |
46939f8b | 470 | |
02669492 | 471 | if (drv && drv->suspend) { |
99dadce8 | 472 | pci_power_t prev = pci_dev->current_state; |
46939f8b | 473 | int error; |
aa8c6c93 | 474 | |
57ef8026 FP |
475 | error = drv->suspend(pci_dev, state); |
476 | suspend_report_result(drv->suspend, error); | |
477 | if (error) | |
478 | return error; | |
aa8c6c93 | 479 | |
46939f8b | 480 | if (!pci_dev->state_saved && pci_dev->current_state != PCI_D0 |
99dadce8 RW |
481 | && pci_dev->current_state != PCI_UNKNOWN) { |
482 | WARN_ONCE(pci_dev->current_state != prev, | |
483 | "PCI PM: Device state not saved by %pF\n", | |
484 | drv->suspend); | |
99dadce8 | 485 | } |
02669492 | 486 | } |
ad8cfa1d RW |
487 | |
488 | pci_fixup_device(pci_fixup_suspend, pci_dev); | |
489 | ||
46939f8b | 490 | return 0; |
1da177e4 LT |
491 | } |
492 | ||
bbb44d9f | 493 | static int pci_legacy_suspend_late(struct device *dev, pm_message_t state) |
cbd69dbb LT |
494 | { |
495 | struct pci_dev * pci_dev = to_pci_dev(dev); | |
496 | struct pci_driver * drv = pci_dev->driver; | |
cbd69dbb LT |
497 | |
498 | if (drv && drv->suspend_late) { | |
46939f8b RW |
499 | pci_power_t prev = pci_dev->current_state; |
500 | int error; | |
501 | ||
57ef8026 FP |
502 | error = drv->suspend_late(pci_dev, state); |
503 | suspend_report_result(drv->suspend_late, error); | |
46939f8b RW |
504 | if (error) |
505 | return error; | |
506 | ||
507 | if (!pci_dev->state_saved && pci_dev->current_state != PCI_D0 | |
508 | && pci_dev->current_state != PCI_UNKNOWN) { | |
509 | WARN_ONCE(pci_dev->current_state != prev, | |
510 | "PCI PM: Device state not saved by %pF\n", | |
511 | drv->suspend_late); | |
512 | return 0; | |
513 | } | |
cbd69dbb | 514 | } |
46939f8b RW |
515 | |
516 | if (!pci_dev->state_saved) | |
517 | pci_save_state(pci_dev); | |
518 | ||
519 | pci_pm_set_unknown_state(pci_dev); | |
520 | ||
521 | return 0; | |
cbd69dbb | 522 | } |
1da177e4 | 523 | |
f6dc1e5e RW |
524 | static int pci_legacy_resume_early(struct device *dev) |
525 | { | |
f6dc1e5e RW |
526 | struct pci_dev * pci_dev = to_pci_dev(dev); |
527 | struct pci_driver * drv = pci_dev->driver; | |
528 | ||
aa8c6c93 RW |
529 | return drv && drv->resume_early ? |
530 | drv->resume_early(pci_dev) : 0; | |
f6dc1e5e RW |
531 | } |
532 | ||
bbb44d9f | 533 | static int pci_legacy_resume(struct device *dev) |
1da177e4 LT |
534 | { |
535 | struct pci_dev * pci_dev = to_pci_dev(dev); | |
536 | struct pci_driver * drv = pci_dev->driver; | |
537 | ||
ad8cfa1d RW |
538 | pci_fixup_device(pci_fixup_resume, pci_dev); |
539 | ||
aa8c6c93 RW |
540 | return drv && drv->resume ? |
541 | drv->resume(pci_dev) : pci_pm_reenable_device(pci_dev); | |
1da177e4 LT |
542 | } |
543 | ||
571ff758 RW |
544 | /* Auxiliary functions used by the new power management framework */ |
545 | ||
5294e256 | 546 | static void pci_pm_default_resume(struct pci_dev *pci_dev) |
571ff758 | 547 | { |
73410429 RW |
548 | pci_fixup_device(pci_fixup_resume, pci_dev); |
549 | ||
5294e256 RW |
550 | if (!pci_is_bridge(pci_dev)) |
551 | pci_enable_wake(pci_dev, PCI_D0, false); | |
571ff758 RW |
552 | } |
553 | ||
5294e256 | 554 | static void pci_pm_default_suspend(struct pci_dev *pci_dev) |
73410429 | 555 | { |
5294e256 | 556 | /* Disable non-bridge devices without PM support */ |
cbbc2f6b RW |
557 | if (!pci_is_bridge(pci_dev)) |
558 | pci_disable_enabled_device(pci_dev); | |
73410429 RW |
559 | } |
560 | ||
07e836e8 RW |
561 | static bool pci_has_legacy_pm_support(struct pci_dev *pci_dev) |
562 | { | |
563 | struct pci_driver *drv = pci_dev->driver; | |
bb808945 | 564 | bool ret = drv && (drv->suspend || drv->suspend_late || drv->resume |
07e836e8 | 565 | || drv->resume_early); |
bb808945 RW |
566 | |
567 | /* | |
568 | * Legacy PM support is used by default, so warn if the new framework is | |
569 | * supported as well. Drivers are supposed to support either the | |
570 | * former, or the latter, but not both at the same time. | |
571 | */ | |
82440a82 DF |
572 | WARN(ret && drv->driver.pm, "driver %s device %04x:%04x\n", |
573 | drv->name, pci_dev->vendor, pci_dev->device); | |
bb808945 RW |
574 | |
575 | return ret; | |
07e836e8 RW |
576 | } |
577 | ||
571ff758 RW |
578 | /* New power management framework */ |
579 | ||
bbb44d9f RW |
580 | static int pci_pm_prepare(struct device *dev) |
581 | { | |
582 | struct device_driver *drv = dev->driver; | |
583 | int error = 0; | |
584 | ||
6cbf8214 RW |
585 | /* |
586 | * PCI devices suspended at run time need to be resumed at this | |
587 | * point, because in general it is necessary to reconfigure them for | |
588 | * system suspend. Namely, if the device is supposed to wake up the | |
589 | * system from the sleep state, we may need to reconfigure it for this | |
590 | * purpose. In turn, if the device is not supposed to wake up the | |
591 | * system from the sleep state, we'll have to prevent it from signaling | |
592 | * wake-up. | |
593 | */ | |
eea3fc03 | 594 | pm_runtime_resume(dev); |
6cbf8214 | 595 | |
bbb44d9f RW |
596 | if (drv && drv->pm && drv->pm->prepare) |
597 | error = drv->pm->prepare(dev); | |
598 | ||
599 | return error; | |
600 | } | |
601 | ||
bbb44d9f | 602 | |
6cbf8214 RW |
603 | #else /* !CONFIG_PM_SLEEP */ |
604 | ||
605 | #define pci_pm_prepare NULL | |
6cbf8214 RW |
606 | |
607 | #endif /* !CONFIG_PM_SLEEP */ | |
608 | ||
bbb44d9f RW |
609 | #ifdef CONFIG_SUSPEND |
610 | ||
611 | static int pci_pm_suspend(struct device *dev) | |
612 | { | |
613 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
8150f32b | 614 | const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; |
bbb44d9f | 615 | |
ad8cfa1d RW |
616 | if (pci_has_legacy_pm_support(pci_dev)) |
617 | return pci_legacy_suspend(dev, PMSG_SUSPEND); | |
bb808945 | 618 | |
5294e256 RW |
619 | if (!pm) { |
620 | pci_pm_default_suspend(pci_dev); | |
621 | goto Fixup; | |
622 | } | |
623 | ||
82fee4d6 | 624 | pci_dev->state_saved = false; |
5294e256 RW |
625 | if (pm->suspend) { |
626 | pci_power_t prev = pci_dev->current_state; | |
627 | int error; | |
628 | ||
ddb7c9d2 RW |
629 | error = pm->suspend(dev); |
630 | suspend_report_result(pm->suspend, error); | |
5294e256 RW |
631 | if (error) |
632 | return error; | |
633 | ||
46939f8b | 634 | if (!pci_dev->state_saved && pci_dev->current_state != PCI_D0 |
5294e256 RW |
635 | && pci_dev->current_state != PCI_UNKNOWN) { |
636 | WARN_ONCE(pci_dev->current_state != prev, | |
637 | "PCI PM: State of device not saved by %pF\n", | |
638 | pm->suspend); | |
5294e256 | 639 | } |
bbb44d9f | 640 | } |
fa58d305 | 641 | |
5294e256 RW |
642 | Fixup: |
643 | pci_fixup_device(pci_fixup_suspend, pci_dev); | |
644 | ||
645 | return 0; | |
bbb44d9f RW |
646 | } |
647 | ||
648 | static int pci_pm_suspend_noirq(struct device *dev) | |
c8958177 | 649 | { |
355a72d7 | 650 | struct pci_dev *pci_dev = to_pci_dev(dev); |
8150f32b | 651 | const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; |
c8958177 | 652 | |
bb808945 RW |
653 | if (pci_has_legacy_pm_support(pci_dev)) |
654 | return pci_legacy_suspend_late(dev, PMSG_SUSPEND); | |
655 | ||
931ff68a RW |
656 | if (!pm) { |
657 | pci_save_state(pci_dev); | |
46939f8b | 658 | return 0; |
931ff68a | 659 | } |
46939f8b RW |
660 | |
661 | if (pm->suspend_noirq) { | |
662 | pci_power_t prev = pci_dev->current_state; | |
663 | int error; | |
664 | ||
665 | error = pm->suspend_noirq(dev); | |
666 | suspend_report_result(pm->suspend_noirq, error); | |
667 | if (error) | |
668 | return error; | |
669 | ||
670 | if (!pci_dev->state_saved && pci_dev->current_state != PCI_D0 | |
671 | && pci_dev->current_state != PCI_UNKNOWN) { | |
672 | WARN_ONCE(pci_dev->current_state != prev, | |
673 | "PCI PM: State of device not saved by %pF\n", | |
674 | pm->suspend_noirq); | |
675 | return 0; | |
676 | } | |
bbb44d9f RW |
677 | } |
678 | ||
46939f8b RW |
679 | if (!pci_dev->state_saved) { |
680 | pci_save_state(pci_dev); | |
681 | if (!pci_is_bridge(pci_dev)) | |
682 | pci_prepare_to_sleep(pci_dev); | |
683 | } | |
d67e37d7 | 684 | |
46939f8b RW |
685 | pci_pm_set_unknown_state(pci_dev); |
686 | ||
dbf0e4c7 AS |
687 | /* |
688 | * Some BIOSes from ASUS have a bug: If a USB EHCI host controller's | |
689 | * PCI COMMAND register isn't 0, the BIOS assumes that the controller | |
690 | * hasn't been quiesced and tries to turn it off. If the controller | |
691 | * is already in D3, this can hang or cause memory corruption. | |
692 | * | |
693 | * Since the value of the COMMAND register doesn't matter once the | |
694 | * device has been suspended, we can safely set it to 0 here. | |
695 | */ | |
696 | if (pci_dev->class == PCI_CLASS_SERIAL_USB_EHCI) | |
697 | pci_write_config_word(pci_dev, PCI_COMMAND, 0); | |
698 | ||
46939f8b | 699 | return 0; |
c8958177 | 700 | } |
1da177e4 | 701 | |
f6dc1e5e | 702 | static int pci_pm_resume_noirq(struct device *dev) |
bbb44d9f RW |
703 | { |
704 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
705 | struct device_driver *drv = dev->driver; | |
355a72d7 | 706 | int error = 0; |
bbb44d9f | 707 | |
6cbf8214 | 708 | pci_pm_default_resume_early(pci_dev); |
aa8c6c93 | 709 | |
ad8cfa1d | 710 | if (pci_has_legacy_pm_support(pci_dev)) |
f6dc1e5e | 711 | return pci_legacy_resume_early(dev); |
bb808945 | 712 | |
f6dc1e5e RW |
713 | if (drv && drv->pm && drv->pm->resume_noirq) |
714 | error = drv->pm->resume_noirq(dev); | |
bbb44d9f RW |
715 | |
716 | return error; | |
717 | } | |
718 | ||
f6dc1e5e | 719 | static int pci_pm_resume(struct device *dev) |
bbb44d9f | 720 | { |
355a72d7 | 721 | struct pci_dev *pci_dev = to_pci_dev(dev); |
8150f32b | 722 | const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; |
bbb44d9f RW |
723 | int error = 0; |
724 | ||
418e4da3 RW |
725 | /* |
726 | * This is necessary for the suspend error path in which resume is | |
727 | * called without restoring the standard config registers of the device. | |
728 | */ | |
729 | if (pci_dev->state_saved) | |
730 | pci_restore_standard_config(pci_dev); | |
731 | ||
ad8cfa1d | 732 | if (pci_has_legacy_pm_support(pci_dev)) |
f6dc1e5e | 733 | return pci_legacy_resume(dev); |
bb808945 | 734 | |
5294e256 | 735 | pci_pm_default_resume(pci_dev); |
73410429 | 736 | |
5294e256 RW |
737 | if (pm) { |
738 | if (pm->resume) | |
739 | error = pm->resume(dev); | |
740 | } else { | |
741 | pci_pm_reenable_device(pci_dev); | |
742 | } | |
bbb44d9f | 743 | |
999cce4a | 744 | return error; |
bbb44d9f RW |
745 | } |
746 | ||
747 | #else /* !CONFIG_SUSPEND */ | |
748 | ||
749 | #define pci_pm_suspend NULL | |
750 | #define pci_pm_suspend_noirq NULL | |
751 | #define pci_pm_resume NULL | |
752 | #define pci_pm_resume_noirq NULL | |
753 | ||
754 | #endif /* !CONFIG_SUSPEND */ | |
755 | ||
1f112cee | 756 | #ifdef CONFIG_HIBERNATE_CALLBACKS |
bbb44d9f | 757 | |
699c1985 SO |
758 | |
759 | /* | |
760 | * pcibios_pm_ops - provide arch-specific hooks when a PCI device is doing | |
761 | * a hibernate transition | |
762 | */ | |
763 | struct dev_pm_ops __weak pcibios_pm_ops; | |
764 | ||
bbb44d9f RW |
765 | static int pci_pm_freeze(struct device *dev) |
766 | { | |
767 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
8150f32b | 768 | const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; |
bbb44d9f | 769 | |
ad8cfa1d RW |
770 | if (pci_has_legacy_pm_support(pci_dev)) |
771 | return pci_legacy_suspend(dev, PMSG_FREEZE); | |
bb808945 | 772 | |
5294e256 RW |
773 | if (!pm) { |
774 | pci_pm_default_suspend(pci_dev); | |
775 | return 0; | |
bbb44d9f RW |
776 | } |
777 | ||
82fee4d6 | 778 | pci_dev->state_saved = false; |
5294e256 RW |
779 | if (pm->freeze) { |
780 | int error; | |
781 | ||
782 | error = pm->freeze(dev); | |
783 | suspend_report_result(pm->freeze, error); | |
784 | if (error) | |
785 | return error; | |
786 | } | |
787 | ||
699c1985 SO |
788 | if (pcibios_pm_ops.freeze) |
789 | return pcibios_pm_ops.freeze(dev); | |
790 | ||
5294e256 | 791 | return 0; |
bbb44d9f RW |
792 | } |
793 | ||
794 | static int pci_pm_freeze_noirq(struct device *dev) | |
795 | { | |
355a72d7 | 796 | struct pci_dev *pci_dev = to_pci_dev(dev); |
adf09493 | 797 | struct device_driver *drv = dev->driver; |
bbb44d9f | 798 | |
bb808945 RW |
799 | if (pci_has_legacy_pm_support(pci_dev)) |
800 | return pci_legacy_suspend_late(dev, PMSG_FREEZE); | |
801 | ||
d67e37d7 | 802 | if (drv && drv->pm && drv->pm->freeze_noirq) { |
46939f8b RW |
803 | int error; |
804 | ||
d67e37d7 RW |
805 | error = drv->pm->freeze_noirq(dev); |
806 | suspend_report_result(drv->pm->freeze_noirq, error); | |
46939f8b RW |
807 | if (error) |
808 | return error; | |
bbb44d9f RW |
809 | } |
810 | ||
46939f8b RW |
811 | if (!pci_dev->state_saved) |
812 | pci_save_state(pci_dev); | |
d67e37d7 | 813 | |
46939f8b RW |
814 | pci_pm_set_unknown_state(pci_dev); |
815 | ||
699c1985 SO |
816 | if (pcibios_pm_ops.freeze_noirq) |
817 | return pcibios_pm_ops.freeze_noirq(dev); | |
818 | ||
46939f8b | 819 | return 0; |
bbb44d9f RW |
820 | } |
821 | ||
f6dc1e5e | 822 | static int pci_pm_thaw_noirq(struct device *dev) |
bbb44d9f | 823 | { |
355a72d7 | 824 | struct pci_dev *pci_dev = to_pci_dev(dev); |
bbb44d9f RW |
825 | struct device_driver *drv = dev->driver; |
826 | int error = 0; | |
827 | ||
699c1985 SO |
828 | if (pcibios_pm_ops.thaw_noirq) { |
829 | error = pcibios_pm_ops.thaw_noirq(dev); | |
830 | if (error) | |
831 | return error; | |
832 | } | |
833 | ||
ad8cfa1d | 834 | if (pci_has_legacy_pm_support(pci_dev)) |
f6dc1e5e | 835 | return pci_legacy_resume_early(dev); |
bb808945 | 836 | |
f6dc1e5e | 837 | pci_update_current_state(pci_dev, PCI_D0); |
d67e37d7 | 838 | |
f6dc1e5e RW |
839 | if (drv && drv->pm && drv->pm->thaw_noirq) |
840 | error = drv->pm->thaw_noirq(dev); | |
bbb44d9f RW |
841 | |
842 | return error; | |
843 | } | |
844 | ||
f6dc1e5e | 845 | static int pci_pm_thaw(struct device *dev) |
bbb44d9f | 846 | { |
355a72d7 | 847 | struct pci_dev *pci_dev = to_pci_dev(dev); |
8150f32b | 848 | const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; |
bbb44d9f RW |
849 | int error = 0; |
850 | ||
699c1985 SO |
851 | if (pcibios_pm_ops.thaw) { |
852 | error = pcibios_pm_ops.thaw(dev); | |
853 | if (error) | |
854 | return error; | |
855 | } | |
856 | ||
ad8cfa1d | 857 | if (pci_has_legacy_pm_support(pci_dev)) |
f6dc1e5e | 858 | return pci_legacy_resume(dev); |
bb808945 | 859 | |
5294e256 RW |
860 | if (pm) { |
861 | if (pm->thaw) | |
862 | error = pm->thaw(dev); | |
863 | } else { | |
864 | pci_pm_reenable_device(pci_dev); | |
865 | } | |
bbb44d9f | 866 | |
4b77b0a2 RW |
867 | pci_dev->state_saved = false; |
868 | ||
bbb44d9f RW |
869 | return error; |
870 | } | |
871 | ||
872 | static int pci_pm_poweroff(struct device *dev) | |
873 | { | |
355a72d7 | 874 | struct pci_dev *pci_dev = to_pci_dev(dev); |
8150f32b | 875 | const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; |
bbb44d9f | 876 | |
ad8cfa1d RW |
877 | if (pci_has_legacy_pm_support(pci_dev)) |
878 | return pci_legacy_suspend(dev, PMSG_HIBERNATE); | |
bb808945 | 879 | |
5294e256 RW |
880 | if (!pm) { |
881 | pci_pm_default_suspend(pci_dev); | |
882 | goto Fixup; | |
883 | } | |
884 | ||
82fee4d6 | 885 | pci_dev->state_saved = false; |
5294e256 | 886 | if (pm->poweroff) { |
46939f8b RW |
887 | int error; |
888 | ||
ddb7c9d2 RW |
889 | error = pm->poweroff(dev); |
890 | suspend_report_result(pm->poweroff, error); | |
46939f8b RW |
891 | if (error) |
892 | return error; | |
bbb44d9f RW |
893 | } |
894 | ||
5294e256 RW |
895 | Fixup: |
896 | pci_fixup_device(pci_fixup_suspend, pci_dev); | |
c9b9972b | 897 | |
699c1985 SO |
898 | if (pcibios_pm_ops.poweroff) |
899 | return pcibios_pm_ops.poweroff(dev); | |
900 | ||
46939f8b | 901 | return 0; |
bbb44d9f RW |
902 | } |
903 | ||
904 | static int pci_pm_poweroff_noirq(struct device *dev) | |
905 | { | |
46939f8b | 906 | struct pci_dev *pci_dev = to_pci_dev(dev); |
adf09493 | 907 | struct device_driver *drv = dev->driver; |
bbb44d9f | 908 | |
bb808945 RW |
909 | if (pci_has_legacy_pm_support(to_pci_dev(dev))) |
910 | return pci_legacy_suspend_late(dev, PMSG_HIBERNATE); | |
911 | ||
46939f8b RW |
912 | if (!drv || !drv->pm) |
913 | return 0; | |
914 | ||
915 | if (drv->pm->poweroff_noirq) { | |
916 | int error; | |
917 | ||
d67e37d7 RW |
918 | error = drv->pm->poweroff_noirq(dev); |
919 | suspend_report_result(drv->pm->poweroff_noirq, error); | |
46939f8b RW |
920 | if (error) |
921 | return error; | |
bbb44d9f RW |
922 | } |
923 | ||
46939f8b RW |
924 | if (!pci_dev->state_saved && !pci_is_bridge(pci_dev)) |
925 | pci_prepare_to_sleep(pci_dev); | |
926 | ||
0b68c8e2 RW |
927 | /* |
928 | * The reason for doing this here is the same as for the analogous code | |
929 | * in pci_pm_suspend_noirq(). | |
930 | */ | |
931 | if (pci_dev->class == PCI_CLASS_SERIAL_USB_EHCI) | |
932 | pci_write_config_word(pci_dev, PCI_COMMAND, 0); | |
933 | ||
699c1985 SO |
934 | if (pcibios_pm_ops.poweroff_noirq) |
935 | return pcibios_pm_ops.poweroff_noirq(dev); | |
936 | ||
46939f8b | 937 | return 0; |
bbb44d9f RW |
938 | } |
939 | ||
f6dc1e5e | 940 | static int pci_pm_restore_noirq(struct device *dev) |
bbb44d9f RW |
941 | { |
942 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
943 | struct device_driver *drv = dev->driver; | |
355a72d7 | 944 | int error = 0; |
bbb44d9f | 945 | |
699c1985 SO |
946 | if (pcibios_pm_ops.restore_noirq) { |
947 | error = pcibios_pm_ops.restore_noirq(dev); | |
948 | if (error) | |
949 | return error; | |
950 | } | |
951 | ||
6cbf8214 | 952 | pci_pm_default_resume_early(pci_dev); |
aa8c6c93 | 953 | |
ad8cfa1d | 954 | if (pci_has_legacy_pm_support(pci_dev)) |
f6dc1e5e | 955 | return pci_legacy_resume_early(dev); |
bb808945 | 956 | |
f6dc1e5e RW |
957 | if (drv && drv->pm && drv->pm->restore_noirq) |
958 | error = drv->pm->restore_noirq(dev); | |
bbb44d9f RW |
959 | |
960 | return error; | |
961 | } | |
962 | ||
f6dc1e5e | 963 | static int pci_pm_restore(struct device *dev) |
bbb44d9f RW |
964 | { |
965 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
8150f32b | 966 | const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; |
bbb44d9f RW |
967 | int error = 0; |
968 | ||
699c1985 SO |
969 | if (pcibios_pm_ops.restore) { |
970 | error = pcibios_pm_ops.restore(dev); | |
971 | if (error) | |
972 | return error; | |
973 | } | |
974 | ||
418e4da3 RW |
975 | /* |
976 | * This is necessary for the hibernation error path in which restore is | |
977 | * called without restoring the standard config registers of the device. | |
978 | */ | |
979 | if (pci_dev->state_saved) | |
980 | pci_restore_standard_config(pci_dev); | |
981 | ||
ad8cfa1d | 982 | if (pci_has_legacy_pm_support(pci_dev)) |
f6dc1e5e | 983 | return pci_legacy_resume(dev); |
bb808945 | 984 | |
5294e256 | 985 | pci_pm_default_resume(pci_dev); |
73410429 | 986 | |
5294e256 RW |
987 | if (pm) { |
988 | if (pm->restore) | |
989 | error = pm->restore(dev); | |
990 | } else { | |
991 | pci_pm_reenable_device(pci_dev); | |
992 | } | |
bbb44d9f RW |
993 | |
994 | return error; | |
c8958177 | 995 | } |
1da177e4 | 996 | |
1f112cee | 997 | #else /* !CONFIG_HIBERNATE_CALLBACKS */ |
bbb44d9f RW |
998 | |
999 | #define pci_pm_freeze NULL | |
1000 | #define pci_pm_freeze_noirq NULL | |
1001 | #define pci_pm_thaw NULL | |
1002 | #define pci_pm_thaw_noirq NULL | |
1003 | #define pci_pm_poweroff NULL | |
1004 | #define pci_pm_poweroff_noirq NULL | |
1005 | #define pci_pm_restore NULL | |
1006 | #define pci_pm_restore_noirq NULL | |
1007 | ||
1f112cee | 1008 | #endif /* !CONFIG_HIBERNATE_CALLBACKS */ |
bbb44d9f | 1009 | |
6cbf8214 RW |
1010 | #ifdef CONFIG_PM_RUNTIME |
1011 | ||
1012 | static int pci_pm_runtime_suspend(struct device *dev) | |
1013 | { | |
1014 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
1015 | const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; | |
1016 | pci_power_t prev = pci_dev->current_state; | |
1017 | int error; | |
1018 | ||
967577b0 HY |
1019 | /* |
1020 | * If pci_dev->driver is not set (unbound), the device should | |
1021 | * always remain in D0 regardless of the runtime PM status | |
1022 | */ | |
1023 | if (!pci_dev->driver) | |
1024 | return 0; | |
1025 | ||
6cbf8214 RW |
1026 | if (!pm || !pm->runtime_suspend) |
1027 | return -ENOSYS; | |
1028 | ||
82fee4d6 | 1029 | pci_dev->state_saved = false; |
448bd857 | 1030 | pci_dev->no_d3cold = false; |
6cbf8214 RW |
1031 | error = pm->runtime_suspend(dev); |
1032 | suspend_report_result(pm->runtime_suspend, error); | |
1033 | if (error) | |
1034 | return error; | |
448bd857 HY |
1035 | if (!pci_dev->d3cold_allowed) |
1036 | pci_dev->no_d3cold = true; | |
6cbf8214 RW |
1037 | |
1038 | pci_fixup_device(pci_fixup_suspend, pci_dev); | |
1039 | ||
1040 | if (!pci_dev->state_saved && pci_dev->current_state != PCI_D0 | |
1041 | && pci_dev->current_state != PCI_UNKNOWN) { | |
1042 | WARN_ONCE(pci_dev->current_state != prev, | |
1043 | "PCI PM: State of device not saved by %pF\n", | |
1044 | pm->runtime_suspend); | |
1045 | return 0; | |
1046 | } | |
1047 | ||
42eca230 | 1048 | if (!pci_dev->state_saved) { |
6cbf8214 | 1049 | pci_save_state(pci_dev); |
42eca230 DA |
1050 | pci_finish_runtime_suspend(pci_dev); |
1051 | } | |
6cbf8214 RW |
1052 | |
1053 | return 0; | |
1054 | } | |
1055 | ||
1056 | static int pci_pm_runtime_resume(struct device *dev) | |
1057 | { | |
448bd857 | 1058 | int rc; |
6cbf8214 RW |
1059 | struct pci_dev *pci_dev = to_pci_dev(dev); |
1060 | const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; | |
1061 | ||
967577b0 HY |
1062 | /* |
1063 | * If pci_dev->driver is not set (unbound), the device should | |
1064 | * always remain in D0 regardless of the runtime PM status | |
1065 | */ | |
1066 | if (!pci_dev->driver) | |
1067 | return 0; | |
1068 | ||
6cbf8214 RW |
1069 | if (!pm || !pm->runtime_resume) |
1070 | return -ENOSYS; | |
1071 | ||
db288c9c RW |
1072 | pci_restore_standard_config(pci_dev); |
1073 | pci_fixup_device(pci_fixup_resume_early, pci_dev); | |
6cbf8214 RW |
1074 | __pci_enable_wake(pci_dev, PCI_D0, true, false); |
1075 | pci_fixup_device(pci_fixup_resume, pci_dev); | |
1076 | ||
448bd857 HY |
1077 | rc = pm->runtime_resume(dev); |
1078 | ||
1079 | pci_dev->runtime_d3cold = false; | |
1080 | ||
1081 | return rc; | |
6cbf8214 RW |
1082 | } |
1083 | ||
1084 | static int pci_pm_runtime_idle(struct device *dev) | |
1085 | { | |
967577b0 | 1086 | struct pci_dev *pci_dev = to_pci_dev(dev); |
6cbf8214 | 1087 | const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; |
45f0a85c | 1088 | int ret = 0; |
6cbf8214 | 1089 | |
967577b0 HY |
1090 | /* |
1091 | * If pci_dev->driver is not set (unbound), the device should | |
1092 | * always remain in D0 regardless of the runtime PM status | |
1093 | */ | |
1094 | if (!pci_dev->driver) | |
45f0a85c | 1095 | return 0; |
967577b0 | 1096 | |
6cbf8214 RW |
1097 | if (!pm) |
1098 | return -ENOSYS; | |
1099 | ||
45f0a85c RW |
1100 | if (pm->runtime_idle) |
1101 | ret = pm->runtime_idle(dev); | |
6cbf8214 | 1102 | |
45f0a85c | 1103 | return ret; |
6cbf8214 RW |
1104 | } |
1105 | ||
1106 | #else /* !CONFIG_PM_RUNTIME */ | |
1107 | ||
1108 | #define pci_pm_runtime_suspend NULL | |
1109 | #define pci_pm_runtime_resume NULL | |
1110 | #define pci_pm_runtime_idle NULL | |
1111 | ||
1112 | #endif /* !CONFIG_PM_RUNTIME */ | |
1113 | ||
aa338601 | 1114 | #ifdef CONFIG_PM |
6cbf8214 | 1115 | |
f91da04d | 1116 | static const struct dev_pm_ops pci_dev_pm_ops = { |
adf09493 | 1117 | .prepare = pci_pm_prepare, |
adf09493 RW |
1118 | .suspend = pci_pm_suspend, |
1119 | .resume = pci_pm_resume, | |
1120 | .freeze = pci_pm_freeze, | |
1121 | .thaw = pci_pm_thaw, | |
1122 | .poweroff = pci_pm_poweroff, | |
1123 | .restore = pci_pm_restore, | |
bbb44d9f RW |
1124 | .suspend_noirq = pci_pm_suspend_noirq, |
1125 | .resume_noirq = pci_pm_resume_noirq, | |
1126 | .freeze_noirq = pci_pm_freeze_noirq, | |
1127 | .thaw_noirq = pci_pm_thaw_noirq, | |
1128 | .poweroff_noirq = pci_pm_poweroff_noirq, | |
1129 | .restore_noirq = pci_pm_restore_noirq, | |
6cbf8214 RW |
1130 | .runtime_suspend = pci_pm_runtime_suspend, |
1131 | .runtime_resume = pci_pm_runtime_resume, | |
1132 | .runtime_idle = pci_pm_runtime_idle, | |
bbb44d9f RW |
1133 | }; |
1134 | ||
adf09493 | 1135 | #define PCI_PM_OPS_PTR (&pci_dev_pm_ops) |
bbb44d9f | 1136 | |
6cbf8214 | 1137 | #else /* !COMFIG_PM_OPS */ |
bbb44d9f RW |
1138 | |
1139 | #define PCI_PM_OPS_PTR NULL | |
1140 | ||
6cbf8214 | 1141 | #endif /* !COMFIG_PM_OPS */ |
bbb44d9f | 1142 | |
1da177e4 | 1143 | /** |
863b18f4 | 1144 | * __pci_register_driver - register a new pci driver |
1da177e4 | 1145 | * @drv: the driver structure to register |
863b18f4 | 1146 | * @owner: owner module of drv |
f95d882d | 1147 | * @mod_name: module name string |
1da177e4 LT |
1148 | * |
1149 | * Adds the driver structure to the list of registered drivers. | |
1150 | * Returns a negative value on error, otherwise 0. | |
eaae4b3a | 1151 | * If no error occurred, the driver remains registered even if |
1da177e4 LT |
1152 | * no device was claimed during registration. |
1153 | */ | |
725522b5 GKH |
1154 | int __pci_register_driver(struct pci_driver *drv, struct module *owner, |
1155 | const char *mod_name) | |
1da177e4 | 1156 | { |
1da177e4 LT |
1157 | /* initialize common driver fields */ |
1158 | drv->driver.name = drv->name; | |
1159 | drv->driver.bus = &pci_bus_type; | |
863b18f4 | 1160 | drv->driver.owner = owner; |
725522b5 | 1161 | drv->driver.mod_name = mod_name; |
50b00755 | 1162 | |
75865858 GKH |
1163 | spin_lock_init(&drv->dynids.lock); |
1164 | INIT_LIST_HEAD(&drv->dynids.list); | |
1da177e4 LT |
1165 | |
1166 | /* register with core */ | |
bfb09a86 | 1167 | return driver_register(&drv->driver); |
1da177e4 LT |
1168 | } |
1169 | ||
1170 | /** | |
1171 | * pci_unregister_driver - unregister a pci driver | |
1172 | * @drv: the driver structure to unregister | |
1173 | * | |
1174 | * Deletes the driver structure from the list of registered PCI drivers, | |
1175 | * gives it a chance to clean up by calling its remove() function for | |
1176 | * each device it was responsible for, and marks those devices as | |
1177 | * driverless. | |
1178 | */ | |
1179 | ||
1180 | void | |
1181 | pci_unregister_driver(struct pci_driver *drv) | |
1182 | { | |
1183 | driver_unregister(&drv->driver); | |
1184 | pci_free_dynids(drv); | |
1185 | } | |
1186 | ||
1187 | static struct pci_driver pci_compat_driver = { | |
1188 | .name = "compat" | |
1189 | }; | |
1190 | ||
1191 | /** | |
1192 | * pci_dev_driver - get the pci_driver of a device | |
1193 | * @dev: the device to query | |
1194 | * | |
1195 | * Returns the appropriate pci_driver structure or %NULL if there is no | |
1196 | * registered driver for the device. | |
1197 | */ | |
1198 | struct pci_driver * | |
1199 | pci_dev_driver(const struct pci_dev *dev) | |
1200 | { | |
1201 | if (dev->driver) | |
1202 | return dev->driver; | |
1203 | else { | |
1204 | int i; | |
1205 | for(i=0; i<=PCI_ROM_RESOURCE; i++) | |
1206 | if (dev->resource[i].flags & IORESOURCE_BUSY) | |
1207 | return &pci_compat_driver; | |
1208 | } | |
1209 | return NULL; | |
1210 | } | |
1211 | ||
1212 | /** | |
1213 | * pci_bus_match - Tell if a PCI device structure has a matching PCI device id structure | |
1da177e4 | 1214 | * @dev: the PCI device structure to match against |
8f7020d3 | 1215 | * @drv: the device driver to search for matching PCI device id structures |
1da177e4 LT |
1216 | * |
1217 | * Used by a driver to check whether a PCI device present in the | |
8f7020d3 | 1218 | * system is in its list of supported devices. Returns the matching |
1da177e4 LT |
1219 | * pci_device_id structure or %NULL if there is no match. |
1220 | */ | |
75865858 | 1221 | static int pci_bus_match(struct device *dev, struct device_driver *drv) |
1da177e4 | 1222 | { |
75865858 | 1223 | struct pci_dev *pci_dev = to_pci_dev(dev); |
58d9a38f | 1224 | struct pci_driver *pci_drv; |
1da177e4 LT |
1225 | const struct pci_device_id *found_id; |
1226 | ||
58d9a38f YL |
1227 | if (!pci_dev->match_driver) |
1228 | return 0; | |
1229 | ||
1230 | pci_drv = to_pci_driver(drv); | |
75865858 | 1231 | found_id = pci_match_device(pci_drv, pci_dev); |
1da177e4 LT |
1232 | if (found_id) |
1233 | return 1; | |
1234 | ||
75865858 | 1235 | return 0; |
1da177e4 LT |
1236 | } |
1237 | ||
1238 | /** | |
1239 | * pci_dev_get - increments the reference count of the pci device structure | |
1240 | * @dev: the device being referenced | |
1241 | * | |
1242 | * Each live reference to a device should be refcounted. | |
1243 | * | |
1244 | * Drivers for PCI devices should normally record such references in | |
1245 | * their probe() methods, when they bind to a device, and release | |
1246 | * them by calling pci_dev_put(), in their disconnect() methods. | |
1247 | * | |
1248 | * A pointer to the device with the incremented reference counter is returned. | |
1249 | */ | |
1250 | struct pci_dev *pci_dev_get(struct pci_dev *dev) | |
1251 | { | |
1252 | if (dev) | |
1253 | get_device(&dev->dev); | |
1254 | return dev; | |
1255 | } | |
1256 | ||
1257 | /** | |
1258 | * pci_dev_put - release a use of the pci device structure | |
1259 | * @dev: device that's been disconnected | |
1260 | * | |
1261 | * Must be called when a user of a device is finished with it. When the last | |
1262 | * user of the device calls this function, the memory of the device is freed. | |
1263 | */ | |
1264 | void pci_dev_put(struct pci_dev *dev) | |
1265 | { | |
1266 | if (dev) | |
1267 | put_device(&dev->dev); | |
1268 | } | |
1269 | ||
8ccc9aa1 BP |
1270 | static int pci_uevent(struct device *dev, struct kobj_uevent_env *env) |
1271 | { | |
1272 | struct pci_dev *pdev; | |
1273 | ||
1274 | if (!dev) | |
1275 | return -ENODEV; | |
1276 | ||
1277 | pdev = to_pci_dev(dev); | |
1278 | if (!pdev) | |
1279 | return -ENODEV; | |
1280 | ||
1281 | if (add_uevent_var(env, "PCI_CLASS=%04X", pdev->class)) | |
1282 | return -ENOMEM; | |
1283 | ||
1284 | if (add_uevent_var(env, "PCI_ID=%04X:%04X", pdev->vendor, pdev->device)) | |
1285 | return -ENOMEM; | |
1286 | ||
1287 | if (add_uevent_var(env, "PCI_SUBSYS_ID=%04X:%04X", pdev->subsystem_vendor, | |
1288 | pdev->subsystem_device)) | |
1289 | return -ENOMEM; | |
1290 | ||
1291 | if (add_uevent_var(env, "PCI_SLOT_NAME=%s", pci_name(pdev))) | |
1292 | return -ENOMEM; | |
1293 | ||
1294 | if (add_uevent_var(env, "MODALIAS=pci:v%08Xd%08Xsv%08Xsd%08Xbc%02Xsc%02Xi%02x", | |
1295 | pdev->vendor, pdev->device, | |
1296 | pdev->subsystem_vendor, pdev->subsystem_device, | |
1297 | (u8)(pdev->class >> 16), (u8)(pdev->class >> 8), | |
1298 | (u8)(pdev->class))) | |
1299 | return -ENOMEM; | |
1300 | return 0; | |
1301 | } | |
1302 | ||
1da177e4 LT |
1303 | struct bus_type pci_bus_type = { |
1304 | .name = "pci", | |
1305 | .match = pci_bus_match, | |
312c004d | 1306 | .uevent = pci_uevent, |
b15d686a RK |
1307 | .probe = pci_device_probe, |
1308 | .remove = pci_device_remove, | |
cbd69dbb | 1309 | .shutdown = pci_device_shutdown, |
1da177e4 | 1310 | .dev_attrs = pci_dev_attrs, |
705b1aaa | 1311 | .bus_attrs = pci_bus_attrs, |
bfb09a86 | 1312 | .drv_attrs = pci_drv_attrs, |
bbb44d9f | 1313 | .pm = PCI_PM_OPS_PTR, |
1da177e4 LT |
1314 | }; |
1315 | ||
1316 | static int __init pci_driver_init(void) | |
1317 | { | |
1318 | return bus_register(&pci_bus_type); | |
1319 | } | |
1320 | ||
1321 | postcore_initcall(pci_driver_init); | |
1322 | ||
9dba910e | 1323 | EXPORT_SYMBOL_GPL(pci_add_dynid); |
75865858 | 1324 | EXPORT_SYMBOL(pci_match_id); |
863b18f4 | 1325 | EXPORT_SYMBOL(__pci_register_driver); |
1da177e4 LT |
1326 | EXPORT_SYMBOL(pci_unregister_driver); |
1327 | EXPORT_SYMBOL(pci_dev_driver); | |
1328 | EXPORT_SYMBOL(pci_bus_type); | |
1329 | EXPORT_SYMBOL(pci_dev_get); | |
1330 | EXPORT_SYMBOL(pci_dev_put); |