Commit | Line | Data |
---|---|---|
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 | } | |
19b6e6a4 | 138 | static DRIVER_ATTR(new_id, S_IWUSR, NULL, store_new_id); |
1da177e4 | 139 | |
0994375e CW |
140 | /** |
141 | * store_remove_id - remove a PCI device ID from this driver | |
142 | * @driver: target device driver | |
143 | * @buf: buffer for scanning device ID data | |
144 | * @count: input size | |
145 | * | |
146 | * Removes a dynamic pci device ID to this driver. | |
147 | */ | |
148 | static ssize_t | |
149 | store_remove_id(struct device_driver *driver, const char *buf, size_t count) | |
150 | { | |
151 | struct pci_dynid *dynid, *n; | |
152 | struct pci_driver *pdrv = to_pci_driver(driver); | |
153 | __u32 vendor, device, subvendor = PCI_ANY_ID, | |
154 | subdevice = PCI_ANY_ID, class = 0, class_mask = 0; | |
155 | int fields = 0; | |
156 | int retval = -ENODEV; | |
157 | ||
158 | fields = sscanf(buf, "%x %x %x %x %x %x", | |
159 | &vendor, &device, &subvendor, &subdevice, | |
160 | &class, &class_mask); | |
161 | if (fields < 2) | |
162 | return -EINVAL; | |
163 | ||
164 | spin_lock(&pdrv->dynids.lock); | |
165 | list_for_each_entry_safe(dynid, n, &pdrv->dynids.list, node) { | |
166 | struct pci_device_id *id = &dynid->id; | |
167 | if ((id->vendor == vendor) && | |
168 | (id->device == device) && | |
169 | (subvendor == PCI_ANY_ID || id->subvendor == subvendor) && | |
170 | (subdevice == PCI_ANY_ID || id->subdevice == subdevice) && | |
171 | !((id->class ^ class) & class_mask)) { | |
172 | list_del(&dynid->node); | |
173 | kfree(dynid); | |
174 | retval = 0; | |
175 | break; | |
176 | } | |
177 | } | |
178 | spin_unlock(&pdrv->dynids.lock); | |
179 | ||
180 | if (retval) | |
181 | return retval; | |
182 | return count; | |
183 | } | |
19b6e6a4 | 184 | static DRIVER_ATTR(remove_id, S_IWUSR, NULL, store_remove_id); |
0994375e | 185 | |
19b6e6a4 GKH |
186 | static struct attribute *pci_drv_attrs[] = { |
187 | &driver_attr_new_id.attr, | |
188 | &driver_attr_remove_id.attr, | |
189 | NULL, | |
bfb09a86 | 190 | }; |
19b6e6a4 | 191 | ATTRIBUTE_GROUPS(pci_drv); |
0994375e | 192 | |
1da177e4 | 193 | /** |
75865858 | 194 | * pci_match_id - See if a pci device matches a given pci_id table |
1da177e4 | 195 | * @ids: array of PCI device id structures to search in |
75865858 GKH |
196 | * @dev: the PCI device structure to match against. |
197 | * | |
1da177e4 | 198 | * Used by a driver to check whether a PCI device present in the |
75865858 | 199 | * system is in its list of supported devices. Returns the matching |
1da177e4 | 200 | * pci_device_id structure or %NULL if there is no match. |
75865858 | 201 | * |
8b60756a | 202 | * Deprecated, don't use this as it will not catch any dynamic ids |
75865858 | 203 | * that a driver might want to check for. |
1da177e4 | 204 | */ |
75865858 GKH |
205 | const struct pci_device_id *pci_match_id(const struct pci_device_id *ids, |
206 | struct pci_dev *dev) | |
1da177e4 | 207 | { |
75865858 GKH |
208 | if (ids) { |
209 | while (ids->vendor || ids->subvendor || ids->class_mask) { | |
210 | if (pci_match_one_device(ids, dev)) | |
211 | return ids; | |
212 | ids++; | |
213 | } | |
1da177e4 LT |
214 | } |
215 | return NULL; | |
216 | } | |
217 | ||
218 | /** | |
ae9608af | 219 | * pci_match_device - Tell if a PCI device structure has a matching PCI device id structure |
75865858 | 220 | * @drv: the PCI driver to match against |
39ba487f | 221 | * @dev: the PCI device structure to match against |
75865858 GKH |
222 | * |
223 | * Used by a driver to check whether a PCI device present in the | |
224 | * system is in its list of supported devices. Returns the matching | |
225 | * pci_device_id structure or %NULL if there is no match. | |
1da177e4 | 226 | */ |
d73460d7 AB |
227 | static const struct pci_device_id *pci_match_device(struct pci_driver *drv, |
228 | struct pci_dev *dev) | |
75865858 | 229 | { |
75865858 | 230 | struct pci_dynid *dynid; |
1da177e4 | 231 | |
7461b60a | 232 | /* Look at the dynamic ids first, before the static ones */ |
75865858 GKH |
233 | spin_lock(&drv->dynids.lock); |
234 | list_for_each_entry(dynid, &drv->dynids.list, node) { | |
235 | if (pci_match_one_device(&dynid->id, dev)) { | |
236 | spin_unlock(&drv->dynids.lock); | |
237 | return &dynid->id; | |
238 | } | |
1da177e4 | 239 | } |
75865858 | 240 | spin_unlock(&drv->dynids.lock); |
7461b60a RK |
241 | |
242 | return pci_match_id(drv->id_table, dev); | |
1da177e4 LT |
243 | } |
244 | ||
873392ca RR |
245 | struct drv_dev_and_id { |
246 | struct pci_driver *drv; | |
247 | struct pci_dev *dev; | |
248 | const struct pci_device_id *id; | |
249 | }; | |
250 | ||
251 | static long local_pci_probe(void *_ddi) | |
252 | { | |
253 | struct drv_dev_and_id *ddi = _ddi; | |
967577b0 HY |
254 | struct pci_dev *pci_dev = ddi->dev; |
255 | struct pci_driver *pci_drv = ddi->drv; | |
256 | struct device *dev = &pci_dev->dev; | |
f3ec4f87 AS |
257 | int rc; |
258 | ||
967577b0 HY |
259 | /* |
260 | * Unbound PCI devices are always put in D0, regardless of | |
261 | * runtime PM status. During probe, the device is set to | |
262 | * active and the usage count is incremented. If the driver | |
263 | * supports runtime PM, it should call pm_runtime_put_noidle() | |
264 | * in its probe routine and pm_runtime_get_noresume() in its | |
265 | * remove routine. | |
f3ec4f87 | 266 | */ |
967577b0 HY |
267 | pm_runtime_get_sync(dev); |
268 | pci_dev->driver = pci_drv; | |
269 | rc = pci_drv->probe(pci_dev, ddi->id); | |
f3ec4f87 | 270 | if (rc) { |
967577b0 HY |
271 | pci_dev->driver = NULL; |
272 | pm_runtime_put_sync(dev); | |
f3ec4f87 AS |
273 | } |
274 | return rc; | |
873392ca RR |
275 | } |
276 | ||
d42c6997 AK |
277 | static int pci_call_probe(struct pci_driver *drv, struct pci_dev *dev, |
278 | const struct pci_device_id *id) | |
279 | { | |
873392ca RR |
280 | int error, node; |
281 | struct drv_dev_and_id ddi = { drv, dev, id }; | |
282 | ||
283 | /* Execute driver initialization on node where the device's | |
284 | bus is attached to. This way the driver likely allocates | |
285 | its local memory on the right node without any need to | |
286 | change it. */ | |
287 | node = dev_to_node(&dev->dev); | |
f70316da | 288 | if (node >= 0) { |
873392ca | 289 | int cpu; |
873392ca RR |
290 | |
291 | get_online_cpus(); | |
a70f7302 | 292 | cpu = cpumask_any_and(cpumask_of_node(node), cpu_online_mask); |
873392ca RR |
293 | if (cpu < nr_cpu_ids) |
294 | error = work_on_cpu(cpu, local_pci_probe, &ddi); | |
295 | else | |
296 | error = local_pci_probe(&ddi); | |
297 | put_online_cpus(); | |
298 | } else | |
299 | error = local_pci_probe(&ddi); | |
d42c6997 AK |
300 | return error; |
301 | } | |
302 | ||
1da177e4 | 303 | /** |
23ea3793 | 304 | * __pci_device_probe - check if a driver wants to claim a specific PCI device |
8f7020d3 RD |
305 | * @drv: driver to call to check if it wants the PCI device |
306 | * @pci_dev: PCI device being probed | |
1da177e4 | 307 | * |
8f7020d3 | 308 | * returns 0 on success, else error. |
1da177e4 LT |
309 | * side-effect: pci_dev->driver is set to drv when drv claims pci_dev. |
310 | */ | |
311 | static int | |
312 | __pci_device_probe(struct pci_driver *drv, struct pci_dev *pci_dev) | |
75865858 GKH |
313 | { |
314 | const struct pci_device_id *id; | |
1da177e4 LT |
315 | int error = 0; |
316 | ||
317 | if (!pci_dev->driver && drv->probe) { | |
75865858 GKH |
318 | error = -ENODEV; |
319 | ||
320 | id = pci_match_device(drv, pci_dev); | |
321 | if (id) | |
d42c6997 | 322 | error = pci_call_probe(drv, pci_dev, id); |
967577b0 | 323 | if (error >= 0) |
75865858 | 324 | error = 0; |
1da177e4 LT |
325 | } |
326 | return error; | |
327 | } | |
328 | ||
329 | static int pci_device_probe(struct device * dev) | |
330 | { | |
331 | int error = 0; | |
332 | struct pci_driver *drv; | |
333 | struct pci_dev *pci_dev; | |
334 | ||
335 | drv = to_pci_driver(dev->driver); | |
336 | pci_dev = to_pci_dev(dev); | |
337 | pci_dev_get(pci_dev); | |
338 | error = __pci_device_probe(drv, pci_dev); | |
339 | if (error) | |
340 | pci_dev_put(pci_dev); | |
341 | ||
342 | return error; | |
343 | } | |
344 | ||
345 | static int pci_device_remove(struct device * dev) | |
346 | { | |
347 | struct pci_dev * pci_dev = to_pci_dev(dev); | |
348 | struct pci_driver * drv = pci_dev->driver; | |
349 | ||
350 | if (drv) { | |
f3ec4f87 AS |
351 | if (drv->remove) { |
352 | pm_runtime_get_sync(dev); | |
1da177e4 | 353 | drv->remove(pci_dev); |
f3ec4f87 AS |
354 | pm_runtime_put_noidle(dev); |
355 | } | |
1da177e4 LT |
356 | pci_dev->driver = NULL; |
357 | } | |
358 | ||
f3ec4f87 | 359 | /* Undo the runtime PM settings in local_pci_probe() */ |
967577b0 | 360 | pm_runtime_put_sync(dev); |
f3ec4f87 | 361 | |
2449e06a SL |
362 | /* |
363 | * If the device is still on, set the power state as "unknown", | |
364 | * since it might change by the next time we load the driver. | |
365 | */ | |
366 | if (pci_dev->current_state == PCI_D0) | |
367 | pci_dev->current_state = PCI_UNKNOWN; | |
368 | ||
1da177e4 LT |
369 | /* |
370 | * We would love to complain here if pci_dev->is_enabled is set, that | |
371 | * the driver should have called pci_disable_device(), but the | |
372 | * unfortunate fact is there are too many odd BIOS and bridge setups | |
373 | * that don't like drivers doing that all of the time. | |
374 | * Oh well, we can dream of sane hardware when we sleep, no matter how | |
375 | * horrible the crap we have to deal with is when we are awake... | |
376 | */ | |
377 | ||
378 | pci_dev_put(pci_dev); | |
379 | return 0; | |
380 | } | |
381 | ||
bbb44d9f RW |
382 | static void pci_device_shutdown(struct device *dev) |
383 | { | |
384 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
385 | struct pci_driver *drv = pci_dev->driver; | |
386 | ||
3ff2de9b HY |
387 | pm_runtime_resume(dev); |
388 | ||
bbb44d9f RW |
389 | if (drv && drv->shutdown) |
390 | drv->shutdown(pci_dev); | |
391 | pci_msi_shutdown(pci_dev); | |
392 | pci_msix_shutdown(pci_dev); | |
5b415f1e | 393 | |
b566a22c KA |
394 | /* |
395 | * Turn off Bus Master bit on the device to tell it to not | |
6e0eda3c | 396 | * continue to do DMA. Don't touch devices in D3cold or unknown states. |
b566a22c | 397 | */ |
6e0eda3c KK |
398 | if (pci_dev->current_state <= PCI_D3hot) |
399 | pci_clear_master(pci_dev); | |
bbb44d9f RW |
400 | } |
401 | ||
aa338601 | 402 | #ifdef CONFIG_PM |
6cbf8214 RW |
403 | |
404 | /* Auxiliary functions used for system resume and run-time resume. */ | |
405 | ||
406 | /** | |
407 | * pci_restore_standard_config - restore standard config registers of PCI device | |
408 | * @pci_dev: PCI device to handle | |
409 | */ | |
410 | static int pci_restore_standard_config(struct pci_dev *pci_dev) | |
411 | { | |
412 | pci_update_current_state(pci_dev, PCI_UNKNOWN); | |
413 | ||
414 | if (pci_dev->current_state != PCI_D0) { | |
415 | int error = pci_set_power_state(pci_dev, PCI_D0); | |
416 | if (error) | |
417 | return error; | |
418 | } | |
419 | ||
1d3c16a8 JM |
420 | pci_restore_state(pci_dev); |
421 | return 0; | |
6cbf8214 RW |
422 | } |
423 | ||
db288c9c RW |
424 | #endif |
425 | ||
426 | #ifdef CONFIG_PM_SLEEP | |
427 | ||
6cbf8214 RW |
428 | static void pci_pm_default_resume_early(struct pci_dev *pci_dev) |
429 | { | |
db288c9c RW |
430 | pci_power_up(pci_dev); |
431 | pci_restore_state(pci_dev); | |
6cbf8214 RW |
432 | pci_fixup_device(pci_fixup_resume_early, pci_dev); |
433 | } | |
434 | ||
fa58d305 RW |
435 | /* |
436 | * Default "suspend" method for devices that have no driver provided suspend, | |
437 | * or not even a driver at all (second part). | |
bbb44d9f | 438 | */ |
bb808945 | 439 | static void pci_pm_set_unknown_state(struct pci_dev *pci_dev) |
bbb44d9f | 440 | { |
bbb44d9f RW |
441 | /* |
442 | * mark its power state as "unknown", since we don't know if | |
443 | * e.g. the BIOS will change its device state when we suspend. | |
444 | */ | |
445 | if (pci_dev->current_state == PCI_D0) | |
446 | pci_dev->current_state = PCI_UNKNOWN; | |
447 | } | |
448 | ||
355a72d7 RW |
449 | /* |
450 | * Default "resume" method for devices that have no driver provided resume, | |
451 | * or not even a driver at all (second part). | |
452 | */ | |
bb808945 | 453 | static int pci_pm_reenable_device(struct pci_dev *pci_dev) |
355a72d7 RW |
454 | { |
455 | int retval; | |
456 | ||
bbb44d9f RW |
457 | /* if the device was enabled before suspend, reenable */ |
458 | retval = pci_reenable_device(pci_dev); | |
459 | /* | |
460 | * if the device was busmaster before the suspend, make it busmaster | |
461 | * again | |
462 | */ | |
463 | if (pci_dev->is_busmaster) | |
464 | pci_set_master(pci_dev); | |
465 | ||
466 | return retval; | |
467 | } | |
468 | ||
469 | static int pci_legacy_suspend(struct device *dev, pm_message_t state) | |
1da177e4 LT |
470 | { |
471 | struct pci_dev * pci_dev = to_pci_dev(dev); | |
472 | struct pci_driver * drv = pci_dev->driver; | |
46939f8b | 473 | |
02669492 | 474 | if (drv && drv->suspend) { |
99dadce8 | 475 | pci_power_t prev = pci_dev->current_state; |
46939f8b | 476 | int error; |
aa8c6c93 | 477 | |
57ef8026 FP |
478 | error = drv->suspend(pci_dev, state); |
479 | suspend_report_result(drv->suspend, error); | |
480 | if (error) | |
481 | return error; | |
aa8c6c93 | 482 | |
46939f8b | 483 | if (!pci_dev->state_saved && pci_dev->current_state != PCI_D0 |
99dadce8 RW |
484 | && pci_dev->current_state != PCI_UNKNOWN) { |
485 | WARN_ONCE(pci_dev->current_state != prev, | |
486 | "PCI PM: Device state not saved by %pF\n", | |
487 | drv->suspend); | |
99dadce8 | 488 | } |
02669492 | 489 | } |
ad8cfa1d RW |
490 | |
491 | pci_fixup_device(pci_fixup_suspend, pci_dev); | |
492 | ||
46939f8b | 493 | return 0; |
1da177e4 LT |
494 | } |
495 | ||
bbb44d9f | 496 | static int pci_legacy_suspend_late(struct device *dev, pm_message_t state) |
cbd69dbb LT |
497 | { |
498 | struct pci_dev * pci_dev = to_pci_dev(dev); | |
499 | struct pci_driver * drv = pci_dev->driver; | |
cbd69dbb LT |
500 | |
501 | if (drv && drv->suspend_late) { | |
46939f8b RW |
502 | pci_power_t prev = pci_dev->current_state; |
503 | int error; | |
504 | ||
57ef8026 FP |
505 | error = drv->suspend_late(pci_dev, state); |
506 | suspend_report_result(drv->suspend_late, error); | |
46939f8b RW |
507 | if (error) |
508 | return error; | |
509 | ||
510 | if (!pci_dev->state_saved && pci_dev->current_state != PCI_D0 | |
511 | && pci_dev->current_state != PCI_UNKNOWN) { | |
512 | WARN_ONCE(pci_dev->current_state != prev, | |
513 | "PCI PM: Device state not saved by %pF\n", | |
514 | drv->suspend_late); | |
515 | return 0; | |
516 | } | |
cbd69dbb | 517 | } |
46939f8b RW |
518 | |
519 | if (!pci_dev->state_saved) | |
520 | pci_save_state(pci_dev); | |
521 | ||
522 | pci_pm_set_unknown_state(pci_dev); | |
523 | ||
524 | return 0; | |
cbd69dbb | 525 | } |
1da177e4 | 526 | |
f6dc1e5e RW |
527 | static int pci_legacy_resume_early(struct device *dev) |
528 | { | |
f6dc1e5e RW |
529 | struct pci_dev * pci_dev = to_pci_dev(dev); |
530 | struct pci_driver * drv = pci_dev->driver; | |
531 | ||
aa8c6c93 RW |
532 | return drv && drv->resume_early ? |
533 | drv->resume_early(pci_dev) : 0; | |
f6dc1e5e RW |
534 | } |
535 | ||
bbb44d9f | 536 | static int pci_legacy_resume(struct device *dev) |
1da177e4 LT |
537 | { |
538 | struct pci_dev * pci_dev = to_pci_dev(dev); | |
539 | struct pci_driver * drv = pci_dev->driver; | |
540 | ||
ad8cfa1d RW |
541 | pci_fixup_device(pci_fixup_resume, pci_dev); |
542 | ||
aa8c6c93 RW |
543 | return drv && drv->resume ? |
544 | drv->resume(pci_dev) : pci_pm_reenable_device(pci_dev); | |
1da177e4 LT |
545 | } |
546 | ||
571ff758 RW |
547 | /* Auxiliary functions used by the new power management framework */ |
548 | ||
5294e256 | 549 | static void pci_pm_default_resume(struct pci_dev *pci_dev) |
571ff758 | 550 | { |
73410429 RW |
551 | pci_fixup_device(pci_fixup_resume, pci_dev); |
552 | ||
5294e256 RW |
553 | if (!pci_is_bridge(pci_dev)) |
554 | pci_enable_wake(pci_dev, PCI_D0, false); | |
571ff758 RW |
555 | } |
556 | ||
5294e256 | 557 | static void pci_pm_default_suspend(struct pci_dev *pci_dev) |
73410429 | 558 | { |
5294e256 | 559 | /* Disable non-bridge devices without PM support */ |
cbbc2f6b RW |
560 | if (!pci_is_bridge(pci_dev)) |
561 | pci_disable_enabled_device(pci_dev); | |
73410429 RW |
562 | } |
563 | ||
07e836e8 RW |
564 | static bool pci_has_legacy_pm_support(struct pci_dev *pci_dev) |
565 | { | |
566 | struct pci_driver *drv = pci_dev->driver; | |
bb808945 | 567 | bool ret = drv && (drv->suspend || drv->suspend_late || drv->resume |
07e836e8 | 568 | || drv->resume_early); |
bb808945 RW |
569 | |
570 | /* | |
571 | * Legacy PM support is used by default, so warn if the new framework is | |
572 | * supported as well. Drivers are supposed to support either the | |
573 | * former, or the latter, but not both at the same time. | |
574 | */ | |
82440a82 DF |
575 | WARN(ret && drv->driver.pm, "driver %s device %04x:%04x\n", |
576 | drv->name, pci_dev->vendor, pci_dev->device); | |
bb808945 RW |
577 | |
578 | return ret; | |
07e836e8 RW |
579 | } |
580 | ||
571ff758 RW |
581 | /* New power management framework */ |
582 | ||
bbb44d9f RW |
583 | static int pci_pm_prepare(struct device *dev) |
584 | { | |
585 | struct device_driver *drv = dev->driver; | |
586 | int error = 0; | |
587 | ||
6cbf8214 RW |
588 | /* |
589 | * PCI devices suspended at run time need to be resumed at this | |
590 | * point, because in general it is necessary to reconfigure them for | |
591 | * system suspend. Namely, if the device is supposed to wake up the | |
592 | * system from the sleep state, we may need to reconfigure it for this | |
593 | * purpose. In turn, if the device is not supposed to wake up the | |
594 | * system from the sleep state, we'll have to prevent it from signaling | |
595 | * wake-up. | |
596 | */ | |
eea3fc03 | 597 | pm_runtime_resume(dev); |
6cbf8214 | 598 | |
bbb44d9f RW |
599 | if (drv && drv->pm && drv->pm->prepare) |
600 | error = drv->pm->prepare(dev); | |
601 | ||
602 | return error; | |
603 | } | |
604 | ||
605 | static void pci_pm_complete(struct device *dev) | |
606 | { | |
607 | struct device_driver *drv = dev->driver; | |
608 | ||
609 | if (drv && drv->pm && drv->pm->complete) | |
610 | drv->pm->complete(dev); | |
611 | } | |
612 | ||
6cbf8214 RW |
613 | #else /* !CONFIG_PM_SLEEP */ |
614 | ||
615 | #define pci_pm_prepare NULL | |
616 | #define pci_pm_complete NULL | |
617 | ||
618 | #endif /* !CONFIG_PM_SLEEP */ | |
619 | ||
bbb44d9f RW |
620 | #ifdef CONFIG_SUSPEND |
621 | ||
622 | static int pci_pm_suspend(struct device *dev) | |
623 | { | |
624 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
8150f32b | 625 | const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; |
bbb44d9f | 626 | |
ad8cfa1d RW |
627 | if (pci_has_legacy_pm_support(pci_dev)) |
628 | return pci_legacy_suspend(dev, PMSG_SUSPEND); | |
bb808945 | 629 | |
5294e256 RW |
630 | if (!pm) { |
631 | pci_pm_default_suspend(pci_dev); | |
632 | goto Fixup; | |
633 | } | |
634 | ||
82fee4d6 | 635 | pci_dev->state_saved = false; |
5294e256 RW |
636 | if (pm->suspend) { |
637 | pci_power_t prev = pci_dev->current_state; | |
638 | int error; | |
639 | ||
ddb7c9d2 RW |
640 | error = pm->suspend(dev); |
641 | suspend_report_result(pm->suspend, error); | |
5294e256 RW |
642 | if (error) |
643 | return error; | |
644 | ||
46939f8b | 645 | if (!pci_dev->state_saved && pci_dev->current_state != PCI_D0 |
5294e256 RW |
646 | && pci_dev->current_state != PCI_UNKNOWN) { |
647 | WARN_ONCE(pci_dev->current_state != prev, | |
648 | "PCI PM: State of device not saved by %pF\n", | |
649 | pm->suspend); | |
5294e256 | 650 | } |
bbb44d9f | 651 | } |
fa58d305 | 652 | |
5294e256 RW |
653 | Fixup: |
654 | pci_fixup_device(pci_fixup_suspend, pci_dev); | |
655 | ||
656 | return 0; | |
bbb44d9f RW |
657 | } |
658 | ||
659 | static int pci_pm_suspend_noirq(struct device *dev) | |
c8958177 | 660 | { |
355a72d7 | 661 | struct pci_dev *pci_dev = to_pci_dev(dev); |
8150f32b | 662 | const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; |
c8958177 | 663 | |
bb808945 RW |
664 | if (pci_has_legacy_pm_support(pci_dev)) |
665 | return pci_legacy_suspend_late(dev, PMSG_SUSPEND); | |
666 | ||
931ff68a RW |
667 | if (!pm) { |
668 | pci_save_state(pci_dev); | |
46939f8b | 669 | return 0; |
931ff68a | 670 | } |
46939f8b RW |
671 | |
672 | if (pm->suspend_noirq) { | |
673 | pci_power_t prev = pci_dev->current_state; | |
674 | int error; | |
675 | ||
676 | error = pm->suspend_noirq(dev); | |
677 | suspend_report_result(pm->suspend_noirq, error); | |
678 | if (error) | |
679 | return error; | |
680 | ||
681 | if (!pci_dev->state_saved && pci_dev->current_state != PCI_D0 | |
682 | && pci_dev->current_state != PCI_UNKNOWN) { | |
683 | WARN_ONCE(pci_dev->current_state != prev, | |
684 | "PCI PM: State of device not saved by %pF\n", | |
685 | pm->suspend_noirq); | |
686 | return 0; | |
687 | } | |
bbb44d9f RW |
688 | } |
689 | ||
46939f8b RW |
690 | if (!pci_dev->state_saved) { |
691 | pci_save_state(pci_dev); | |
692 | if (!pci_is_bridge(pci_dev)) | |
693 | pci_prepare_to_sleep(pci_dev); | |
694 | } | |
d67e37d7 | 695 | |
46939f8b RW |
696 | pci_pm_set_unknown_state(pci_dev); |
697 | ||
dbf0e4c7 AS |
698 | /* |
699 | * Some BIOSes from ASUS have a bug: If a USB EHCI host controller's | |
700 | * PCI COMMAND register isn't 0, the BIOS assumes that the controller | |
701 | * hasn't been quiesced and tries to turn it off. If the controller | |
702 | * is already in D3, this can hang or cause memory corruption. | |
703 | * | |
704 | * Since the value of the COMMAND register doesn't matter once the | |
705 | * device has been suspended, we can safely set it to 0 here. | |
706 | */ | |
707 | if (pci_dev->class == PCI_CLASS_SERIAL_USB_EHCI) | |
708 | pci_write_config_word(pci_dev, PCI_COMMAND, 0); | |
709 | ||
46939f8b | 710 | return 0; |
c8958177 | 711 | } |
1da177e4 | 712 | |
f6dc1e5e | 713 | static int pci_pm_resume_noirq(struct device *dev) |
bbb44d9f RW |
714 | { |
715 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
716 | struct device_driver *drv = dev->driver; | |
355a72d7 | 717 | int error = 0; |
bbb44d9f | 718 | |
6cbf8214 | 719 | pci_pm_default_resume_early(pci_dev); |
aa8c6c93 | 720 | |
ad8cfa1d | 721 | if (pci_has_legacy_pm_support(pci_dev)) |
f6dc1e5e | 722 | return pci_legacy_resume_early(dev); |
bb808945 | 723 | |
f6dc1e5e RW |
724 | if (drv && drv->pm && drv->pm->resume_noirq) |
725 | error = drv->pm->resume_noirq(dev); | |
bbb44d9f RW |
726 | |
727 | return error; | |
728 | } | |
729 | ||
f6dc1e5e | 730 | static int pci_pm_resume(struct device *dev) |
bbb44d9f | 731 | { |
355a72d7 | 732 | struct pci_dev *pci_dev = to_pci_dev(dev); |
8150f32b | 733 | const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; |
bbb44d9f RW |
734 | int error = 0; |
735 | ||
418e4da3 RW |
736 | /* |
737 | * This is necessary for the suspend error path in which resume is | |
738 | * called without restoring the standard config registers of the device. | |
739 | */ | |
740 | if (pci_dev->state_saved) | |
741 | pci_restore_standard_config(pci_dev); | |
742 | ||
ad8cfa1d | 743 | if (pci_has_legacy_pm_support(pci_dev)) |
f6dc1e5e | 744 | return pci_legacy_resume(dev); |
bb808945 | 745 | |
5294e256 | 746 | pci_pm_default_resume(pci_dev); |
73410429 | 747 | |
5294e256 RW |
748 | if (pm) { |
749 | if (pm->resume) | |
750 | error = pm->resume(dev); | |
751 | } else { | |
752 | pci_pm_reenable_device(pci_dev); | |
753 | } | |
bbb44d9f | 754 | |
999cce4a | 755 | return error; |
bbb44d9f RW |
756 | } |
757 | ||
758 | #else /* !CONFIG_SUSPEND */ | |
759 | ||
760 | #define pci_pm_suspend NULL | |
761 | #define pci_pm_suspend_noirq NULL | |
762 | #define pci_pm_resume NULL | |
763 | #define pci_pm_resume_noirq NULL | |
764 | ||
765 | #endif /* !CONFIG_SUSPEND */ | |
766 | ||
1f112cee | 767 | #ifdef CONFIG_HIBERNATE_CALLBACKS |
bbb44d9f | 768 | |
699c1985 SO |
769 | |
770 | /* | |
771 | * pcibios_pm_ops - provide arch-specific hooks when a PCI device is doing | |
772 | * a hibernate transition | |
773 | */ | |
774 | struct dev_pm_ops __weak pcibios_pm_ops; | |
775 | ||
bbb44d9f RW |
776 | static int pci_pm_freeze(struct device *dev) |
777 | { | |
778 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
8150f32b | 779 | const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; |
bbb44d9f | 780 | |
ad8cfa1d RW |
781 | if (pci_has_legacy_pm_support(pci_dev)) |
782 | return pci_legacy_suspend(dev, PMSG_FREEZE); | |
bb808945 | 783 | |
5294e256 RW |
784 | if (!pm) { |
785 | pci_pm_default_suspend(pci_dev); | |
786 | return 0; | |
bbb44d9f RW |
787 | } |
788 | ||
82fee4d6 | 789 | pci_dev->state_saved = false; |
5294e256 RW |
790 | if (pm->freeze) { |
791 | int error; | |
792 | ||
793 | error = pm->freeze(dev); | |
794 | suspend_report_result(pm->freeze, error); | |
795 | if (error) | |
796 | return error; | |
797 | } | |
798 | ||
699c1985 SO |
799 | if (pcibios_pm_ops.freeze) |
800 | return pcibios_pm_ops.freeze(dev); | |
801 | ||
5294e256 | 802 | return 0; |
bbb44d9f RW |
803 | } |
804 | ||
805 | static int pci_pm_freeze_noirq(struct device *dev) | |
806 | { | |
355a72d7 | 807 | struct pci_dev *pci_dev = to_pci_dev(dev); |
adf09493 | 808 | struct device_driver *drv = dev->driver; |
bbb44d9f | 809 | |
bb808945 RW |
810 | if (pci_has_legacy_pm_support(pci_dev)) |
811 | return pci_legacy_suspend_late(dev, PMSG_FREEZE); | |
812 | ||
d67e37d7 | 813 | if (drv && drv->pm && drv->pm->freeze_noirq) { |
46939f8b RW |
814 | int error; |
815 | ||
d67e37d7 RW |
816 | error = drv->pm->freeze_noirq(dev); |
817 | suspend_report_result(drv->pm->freeze_noirq, error); | |
46939f8b RW |
818 | if (error) |
819 | return error; | |
bbb44d9f RW |
820 | } |
821 | ||
46939f8b RW |
822 | if (!pci_dev->state_saved) |
823 | pci_save_state(pci_dev); | |
d67e37d7 | 824 | |
46939f8b RW |
825 | pci_pm_set_unknown_state(pci_dev); |
826 | ||
699c1985 SO |
827 | if (pcibios_pm_ops.freeze_noirq) |
828 | return pcibios_pm_ops.freeze_noirq(dev); | |
829 | ||
46939f8b | 830 | return 0; |
bbb44d9f RW |
831 | } |
832 | ||
f6dc1e5e | 833 | static int pci_pm_thaw_noirq(struct device *dev) |
bbb44d9f | 834 | { |
355a72d7 | 835 | struct pci_dev *pci_dev = to_pci_dev(dev); |
bbb44d9f RW |
836 | struct device_driver *drv = dev->driver; |
837 | int error = 0; | |
838 | ||
699c1985 SO |
839 | if (pcibios_pm_ops.thaw_noirq) { |
840 | error = pcibios_pm_ops.thaw_noirq(dev); | |
841 | if (error) | |
842 | return error; | |
843 | } | |
844 | ||
ad8cfa1d | 845 | if (pci_has_legacy_pm_support(pci_dev)) |
f6dc1e5e | 846 | return pci_legacy_resume_early(dev); |
bb808945 | 847 | |
f6dc1e5e | 848 | pci_update_current_state(pci_dev, PCI_D0); |
d67e37d7 | 849 | |
f6dc1e5e RW |
850 | if (drv && drv->pm && drv->pm->thaw_noirq) |
851 | error = drv->pm->thaw_noirq(dev); | |
bbb44d9f RW |
852 | |
853 | return error; | |
854 | } | |
855 | ||
f6dc1e5e | 856 | static int pci_pm_thaw(struct device *dev) |
bbb44d9f | 857 | { |
355a72d7 | 858 | struct pci_dev *pci_dev = to_pci_dev(dev); |
8150f32b | 859 | const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; |
bbb44d9f RW |
860 | int error = 0; |
861 | ||
699c1985 SO |
862 | if (pcibios_pm_ops.thaw) { |
863 | error = pcibios_pm_ops.thaw(dev); | |
864 | if (error) | |
865 | return error; | |
866 | } | |
867 | ||
ad8cfa1d | 868 | if (pci_has_legacy_pm_support(pci_dev)) |
f6dc1e5e | 869 | return pci_legacy_resume(dev); |
bb808945 | 870 | |
5294e256 RW |
871 | if (pm) { |
872 | if (pm->thaw) | |
873 | error = pm->thaw(dev); | |
874 | } else { | |
875 | pci_pm_reenable_device(pci_dev); | |
876 | } | |
bbb44d9f | 877 | |
4b77b0a2 RW |
878 | pci_dev->state_saved = false; |
879 | ||
bbb44d9f RW |
880 | return error; |
881 | } | |
882 | ||
883 | static int pci_pm_poweroff(struct device *dev) | |
884 | { | |
355a72d7 | 885 | struct pci_dev *pci_dev = to_pci_dev(dev); |
8150f32b | 886 | const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; |
bbb44d9f | 887 | |
ad8cfa1d RW |
888 | if (pci_has_legacy_pm_support(pci_dev)) |
889 | return pci_legacy_suspend(dev, PMSG_HIBERNATE); | |
bb808945 | 890 | |
5294e256 RW |
891 | if (!pm) { |
892 | pci_pm_default_suspend(pci_dev); | |
893 | goto Fixup; | |
894 | } | |
895 | ||
82fee4d6 | 896 | pci_dev->state_saved = false; |
5294e256 | 897 | if (pm->poweroff) { |
46939f8b RW |
898 | int error; |
899 | ||
ddb7c9d2 RW |
900 | error = pm->poweroff(dev); |
901 | suspend_report_result(pm->poweroff, error); | |
46939f8b RW |
902 | if (error) |
903 | return error; | |
bbb44d9f RW |
904 | } |
905 | ||
5294e256 RW |
906 | Fixup: |
907 | pci_fixup_device(pci_fixup_suspend, pci_dev); | |
c9b9972b | 908 | |
699c1985 SO |
909 | if (pcibios_pm_ops.poweroff) |
910 | return pcibios_pm_ops.poweroff(dev); | |
911 | ||
46939f8b | 912 | return 0; |
bbb44d9f RW |
913 | } |
914 | ||
915 | static int pci_pm_poweroff_noirq(struct device *dev) | |
916 | { | |
46939f8b | 917 | struct pci_dev *pci_dev = to_pci_dev(dev); |
adf09493 | 918 | struct device_driver *drv = dev->driver; |
bbb44d9f | 919 | |
bb808945 RW |
920 | if (pci_has_legacy_pm_support(to_pci_dev(dev))) |
921 | return pci_legacy_suspend_late(dev, PMSG_HIBERNATE); | |
922 | ||
46939f8b RW |
923 | if (!drv || !drv->pm) |
924 | return 0; | |
925 | ||
926 | if (drv->pm->poweroff_noirq) { | |
927 | int error; | |
928 | ||
d67e37d7 RW |
929 | error = drv->pm->poweroff_noirq(dev); |
930 | suspend_report_result(drv->pm->poweroff_noirq, error); | |
46939f8b RW |
931 | if (error) |
932 | return error; | |
bbb44d9f RW |
933 | } |
934 | ||
46939f8b RW |
935 | if (!pci_dev->state_saved && !pci_is_bridge(pci_dev)) |
936 | pci_prepare_to_sleep(pci_dev); | |
937 | ||
0b68c8e2 RW |
938 | /* |
939 | * The reason for doing this here is the same as for the analogous code | |
940 | * in pci_pm_suspend_noirq(). | |
941 | */ | |
942 | if (pci_dev->class == PCI_CLASS_SERIAL_USB_EHCI) | |
943 | pci_write_config_word(pci_dev, PCI_COMMAND, 0); | |
944 | ||
699c1985 SO |
945 | if (pcibios_pm_ops.poweroff_noirq) |
946 | return pcibios_pm_ops.poweroff_noirq(dev); | |
947 | ||
46939f8b | 948 | return 0; |
bbb44d9f RW |
949 | } |
950 | ||
f6dc1e5e | 951 | static int pci_pm_restore_noirq(struct device *dev) |
bbb44d9f RW |
952 | { |
953 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
954 | struct device_driver *drv = dev->driver; | |
355a72d7 | 955 | int error = 0; |
bbb44d9f | 956 | |
699c1985 SO |
957 | if (pcibios_pm_ops.restore_noirq) { |
958 | error = pcibios_pm_ops.restore_noirq(dev); | |
959 | if (error) | |
960 | return error; | |
961 | } | |
962 | ||
6cbf8214 | 963 | pci_pm_default_resume_early(pci_dev); |
aa8c6c93 | 964 | |
ad8cfa1d | 965 | if (pci_has_legacy_pm_support(pci_dev)) |
f6dc1e5e | 966 | return pci_legacy_resume_early(dev); |
bb808945 | 967 | |
f6dc1e5e RW |
968 | if (drv && drv->pm && drv->pm->restore_noirq) |
969 | error = drv->pm->restore_noirq(dev); | |
bbb44d9f RW |
970 | |
971 | return error; | |
972 | } | |
973 | ||
f6dc1e5e | 974 | static int pci_pm_restore(struct device *dev) |
bbb44d9f RW |
975 | { |
976 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
8150f32b | 977 | const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; |
bbb44d9f RW |
978 | int error = 0; |
979 | ||
699c1985 SO |
980 | if (pcibios_pm_ops.restore) { |
981 | error = pcibios_pm_ops.restore(dev); | |
982 | if (error) | |
983 | return error; | |
984 | } | |
985 | ||
418e4da3 RW |
986 | /* |
987 | * This is necessary for the hibernation error path in which restore is | |
988 | * called without restoring the standard config registers of the device. | |
989 | */ | |
990 | if (pci_dev->state_saved) | |
991 | pci_restore_standard_config(pci_dev); | |
992 | ||
ad8cfa1d | 993 | if (pci_has_legacy_pm_support(pci_dev)) |
f6dc1e5e | 994 | return pci_legacy_resume(dev); |
bb808945 | 995 | |
5294e256 | 996 | pci_pm_default_resume(pci_dev); |
73410429 | 997 | |
5294e256 RW |
998 | if (pm) { |
999 | if (pm->restore) | |
1000 | error = pm->restore(dev); | |
1001 | } else { | |
1002 | pci_pm_reenable_device(pci_dev); | |
1003 | } | |
bbb44d9f RW |
1004 | |
1005 | return error; | |
c8958177 | 1006 | } |
1da177e4 | 1007 | |
1f112cee | 1008 | #else /* !CONFIG_HIBERNATE_CALLBACKS */ |
bbb44d9f RW |
1009 | |
1010 | #define pci_pm_freeze NULL | |
1011 | #define pci_pm_freeze_noirq NULL | |
1012 | #define pci_pm_thaw NULL | |
1013 | #define pci_pm_thaw_noirq NULL | |
1014 | #define pci_pm_poweroff NULL | |
1015 | #define pci_pm_poweroff_noirq NULL | |
1016 | #define pci_pm_restore NULL | |
1017 | #define pci_pm_restore_noirq NULL | |
1018 | ||
1f112cee | 1019 | #endif /* !CONFIG_HIBERNATE_CALLBACKS */ |
bbb44d9f | 1020 | |
6cbf8214 RW |
1021 | #ifdef CONFIG_PM_RUNTIME |
1022 | ||
1023 | static int pci_pm_runtime_suspend(struct device *dev) | |
1024 | { | |
1025 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
1026 | const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; | |
1027 | pci_power_t prev = pci_dev->current_state; | |
1028 | int error; | |
1029 | ||
967577b0 HY |
1030 | /* |
1031 | * If pci_dev->driver is not set (unbound), the device should | |
1032 | * always remain in D0 regardless of the runtime PM status | |
1033 | */ | |
1034 | if (!pci_dev->driver) | |
1035 | return 0; | |
1036 | ||
6cbf8214 RW |
1037 | if (!pm || !pm->runtime_suspend) |
1038 | return -ENOSYS; | |
1039 | ||
82fee4d6 | 1040 | pci_dev->state_saved = false; |
448bd857 | 1041 | pci_dev->no_d3cold = false; |
6cbf8214 RW |
1042 | error = pm->runtime_suspend(dev); |
1043 | suspend_report_result(pm->runtime_suspend, error); | |
1044 | if (error) | |
1045 | return error; | |
448bd857 HY |
1046 | if (!pci_dev->d3cold_allowed) |
1047 | pci_dev->no_d3cold = true; | |
6cbf8214 RW |
1048 | |
1049 | pci_fixup_device(pci_fixup_suspend, pci_dev); | |
1050 | ||
1051 | if (!pci_dev->state_saved && pci_dev->current_state != PCI_D0 | |
1052 | && pci_dev->current_state != PCI_UNKNOWN) { | |
1053 | WARN_ONCE(pci_dev->current_state != prev, | |
1054 | "PCI PM: State of device not saved by %pF\n", | |
1055 | pm->runtime_suspend); | |
1056 | return 0; | |
1057 | } | |
1058 | ||
42eca230 | 1059 | if (!pci_dev->state_saved) { |
6cbf8214 | 1060 | pci_save_state(pci_dev); |
42eca230 DA |
1061 | pci_finish_runtime_suspend(pci_dev); |
1062 | } | |
6cbf8214 RW |
1063 | |
1064 | return 0; | |
1065 | } | |
1066 | ||
1067 | static int pci_pm_runtime_resume(struct device *dev) | |
1068 | { | |
448bd857 | 1069 | int rc; |
6cbf8214 RW |
1070 | struct pci_dev *pci_dev = to_pci_dev(dev); |
1071 | const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; | |
1072 | ||
967577b0 HY |
1073 | /* |
1074 | * If pci_dev->driver is not set (unbound), the device should | |
1075 | * always remain in D0 regardless of the runtime PM status | |
1076 | */ | |
1077 | if (!pci_dev->driver) | |
1078 | return 0; | |
1079 | ||
6cbf8214 RW |
1080 | if (!pm || !pm->runtime_resume) |
1081 | return -ENOSYS; | |
1082 | ||
db288c9c RW |
1083 | pci_restore_standard_config(pci_dev); |
1084 | pci_fixup_device(pci_fixup_resume_early, pci_dev); | |
6cbf8214 RW |
1085 | __pci_enable_wake(pci_dev, PCI_D0, true, false); |
1086 | pci_fixup_device(pci_fixup_resume, pci_dev); | |
1087 | ||
448bd857 HY |
1088 | rc = pm->runtime_resume(dev); |
1089 | ||
1090 | pci_dev->runtime_d3cold = false; | |
1091 | ||
1092 | return rc; | |
6cbf8214 RW |
1093 | } |
1094 | ||
1095 | static int pci_pm_runtime_idle(struct device *dev) | |
1096 | { | |
967577b0 | 1097 | struct pci_dev *pci_dev = to_pci_dev(dev); |
6cbf8214 | 1098 | const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; |
45f0a85c | 1099 | int ret = 0; |
6cbf8214 | 1100 | |
967577b0 HY |
1101 | /* |
1102 | * If pci_dev->driver is not set (unbound), the device should | |
1103 | * always remain in D0 regardless of the runtime PM status | |
1104 | */ | |
1105 | if (!pci_dev->driver) | |
45f0a85c | 1106 | return 0; |
967577b0 | 1107 | |
6cbf8214 RW |
1108 | if (!pm) |
1109 | return -ENOSYS; | |
1110 | ||
45f0a85c RW |
1111 | if (pm->runtime_idle) |
1112 | ret = pm->runtime_idle(dev); | |
6cbf8214 | 1113 | |
45f0a85c | 1114 | return ret; |
6cbf8214 RW |
1115 | } |
1116 | ||
1117 | #else /* !CONFIG_PM_RUNTIME */ | |
1118 | ||
1119 | #define pci_pm_runtime_suspend NULL | |
1120 | #define pci_pm_runtime_resume NULL | |
1121 | #define pci_pm_runtime_idle NULL | |
1122 | ||
1123 | #endif /* !CONFIG_PM_RUNTIME */ | |
1124 | ||
aa338601 | 1125 | #ifdef CONFIG_PM |
6cbf8214 | 1126 | |
8150f32b | 1127 | const struct dev_pm_ops pci_dev_pm_ops = { |
adf09493 RW |
1128 | .prepare = pci_pm_prepare, |
1129 | .complete = pci_pm_complete, | |
1130 | .suspend = pci_pm_suspend, | |
1131 | .resume = pci_pm_resume, | |
1132 | .freeze = pci_pm_freeze, | |
1133 | .thaw = pci_pm_thaw, | |
1134 | .poweroff = pci_pm_poweroff, | |
1135 | .restore = pci_pm_restore, | |
bbb44d9f RW |
1136 | .suspend_noirq = pci_pm_suspend_noirq, |
1137 | .resume_noirq = pci_pm_resume_noirq, | |
1138 | .freeze_noirq = pci_pm_freeze_noirq, | |
1139 | .thaw_noirq = pci_pm_thaw_noirq, | |
1140 | .poweroff_noirq = pci_pm_poweroff_noirq, | |
1141 | .restore_noirq = pci_pm_restore_noirq, | |
6cbf8214 RW |
1142 | .runtime_suspend = pci_pm_runtime_suspend, |
1143 | .runtime_resume = pci_pm_runtime_resume, | |
1144 | .runtime_idle = pci_pm_runtime_idle, | |
bbb44d9f RW |
1145 | }; |
1146 | ||
adf09493 | 1147 | #define PCI_PM_OPS_PTR (&pci_dev_pm_ops) |
bbb44d9f | 1148 | |
6cbf8214 | 1149 | #else /* !COMFIG_PM_OPS */ |
bbb44d9f RW |
1150 | |
1151 | #define PCI_PM_OPS_PTR NULL | |
1152 | ||
6cbf8214 | 1153 | #endif /* !COMFIG_PM_OPS */ |
bbb44d9f | 1154 | |
1da177e4 | 1155 | /** |
863b18f4 | 1156 | * __pci_register_driver - register a new pci driver |
1da177e4 | 1157 | * @drv: the driver structure to register |
863b18f4 | 1158 | * @owner: owner module of drv |
f95d882d | 1159 | * @mod_name: module name string |
1da177e4 LT |
1160 | * |
1161 | * Adds the driver structure to the list of registered drivers. | |
1162 | * Returns a negative value on error, otherwise 0. | |
eaae4b3a | 1163 | * If no error occurred, the driver remains registered even if |
1da177e4 LT |
1164 | * no device was claimed during registration. |
1165 | */ | |
725522b5 GKH |
1166 | int __pci_register_driver(struct pci_driver *drv, struct module *owner, |
1167 | const char *mod_name) | |
1da177e4 | 1168 | { |
1da177e4 LT |
1169 | /* initialize common driver fields */ |
1170 | drv->driver.name = drv->name; | |
1171 | drv->driver.bus = &pci_bus_type; | |
863b18f4 | 1172 | drv->driver.owner = owner; |
725522b5 | 1173 | drv->driver.mod_name = mod_name; |
50b00755 | 1174 | |
75865858 GKH |
1175 | spin_lock_init(&drv->dynids.lock); |
1176 | INIT_LIST_HEAD(&drv->dynids.list); | |
1da177e4 LT |
1177 | |
1178 | /* register with core */ | |
bfb09a86 | 1179 | return driver_register(&drv->driver); |
1da177e4 LT |
1180 | } |
1181 | ||
1182 | /** | |
1183 | * pci_unregister_driver - unregister a pci driver | |
1184 | * @drv: the driver structure to unregister | |
1185 | * | |
1186 | * Deletes the driver structure from the list of registered PCI drivers, | |
1187 | * gives it a chance to clean up by calling its remove() function for | |
1188 | * each device it was responsible for, and marks those devices as | |
1189 | * driverless. | |
1190 | */ | |
1191 | ||
1192 | void | |
1193 | pci_unregister_driver(struct pci_driver *drv) | |
1194 | { | |
1195 | driver_unregister(&drv->driver); | |
1196 | pci_free_dynids(drv); | |
1197 | } | |
1198 | ||
1199 | static struct pci_driver pci_compat_driver = { | |
1200 | .name = "compat" | |
1201 | }; | |
1202 | ||
1203 | /** | |
1204 | * pci_dev_driver - get the pci_driver of a device | |
1205 | * @dev: the device to query | |
1206 | * | |
1207 | * Returns the appropriate pci_driver structure or %NULL if there is no | |
1208 | * registered driver for the device. | |
1209 | */ | |
1210 | struct pci_driver * | |
1211 | pci_dev_driver(const struct pci_dev *dev) | |
1212 | { | |
1213 | if (dev->driver) | |
1214 | return dev->driver; | |
1215 | else { | |
1216 | int i; | |
1217 | for(i=0; i<=PCI_ROM_RESOURCE; i++) | |
1218 | if (dev->resource[i].flags & IORESOURCE_BUSY) | |
1219 | return &pci_compat_driver; | |
1220 | } | |
1221 | return NULL; | |
1222 | } | |
1223 | ||
1224 | /** | |
1225 | * pci_bus_match - Tell if a PCI device structure has a matching PCI device id structure | |
1da177e4 | 1226 | * @dev: the PCI device structure to match against |
8f7020d3 | 1227 | * @drv: the device driver to search for matching PCI device id structures |
1da177e4 LT |
1228 | * |
1229 | * Used by a driver to check whether a PCI device present in the | |
8f7020d3 | 1230 | * system is in its list of supported devices. Returns the matching |
1da177e4 LT |
1231 | * pci_device_id structure or %NULL if there is no match. |
1232 | */ | |
75865858 | 1233 | static int pci_bus_match(struct device *dev, struct device_driver *drv) |
1da177e4 | 1234 | { |
75865858 | 1235 | struct pci_dev *pci_dev = to_pci_dev(dev); |
58d9a38f | 1236 | struct pci_driver *pci_drv; |
1da177e4 LT |
1237 | const struct pci_device_id *found_id; |
1238 | ||
58d9a38f YL |
1239 | if (!pci_dev->match_driver) |
1240 | return 0; | |
1241 | ||
1242 | pci_drv = to_pci_driver(drv); | |
75865858 | 1243 | found_id = pci_match_device(pci_drv, pci_dev); |
1da177e4 LT |
1244 | if (found_id) |
1245 | return 1; | |
1246 | ||
75865858 | 1247 | return 0; |
1da177e4 LT |
1248 | } |
1249 | ||
1250 | /** | |
1251 | * pci_dev_get - increments the reference count of the pci device structure | |
1252 | * @dev: the device being referenced | |
1253 | * | |
1254 | * Each live reference to a device should be refcounted. | |
1255 | * | |
1256 | * Drivers for PCI devices should normally record such references in | |
1257 | * their probe() methods, when they bind to a device, and release | |
1258 | * them by calling pci_dev_put(), in their disconnect() methods. | |
1259 | * | |
1260 | * A pointer to the device with the incremented reference counter is returned. | |
1261 | */ | |
1262 | struct pci_dev *pci_dev_get(struct pci_dev *dev) | |
1263 | { | |
1264 | if (dev) | |
1265 | get_device(&dev->dev); | |
1266 | return dev; | |
1267 | } | |
1268 | ||
1269 | /** | |
1270 | * pci_dev_put - release a use of the pci device structure | |
1271 | * @dev: device that's been disconnected | |
1272 | * | |
1273 | * Must be called when a user of a device is finished with it. When the last | |
1274 | * user of the device calls this function, the memory of the device is freed. | |
1275 | */ | |
1276 | void pci_dev_put(struct pci_dev *dev) | |
1277 | { | |
1278 | if (dev) | |
1279 | put_device(&dev->dev); | |
1280 | } | |
1281 | ||
8ccc9aa1 BP |
1282 | static int pci_uevent(struct device *dev, struct kobj_uevent_env *env) |
1283 | { | |
1284 | struct pci_dev *pdev; | |
1285 | ||
1286 | if (!dev) | |
1287 | return -ENODEV; | |
1288 | ||
1289 | pdev = to_pci_dev(dev); | |
1290 | if (!pdev) | |
1291 | return -ENODEV; | |
1292 | ||
1293 | if (add_uevent_var(env, "PCI_CLASS=%04X", pdev->class)) | |
1294 | return -ENOMEM; | |
1295 | ||
1296 | if (add_uevent_var(env, "PCI_ID=%04X:%04X", pdev->vendor, pdev->device)) | |
1297 | return -ENOMEM; | |
1298 | ||
1299 | if (add_uevent_var(env, "PCI_SUBSYS_ID=%04X:%04X", pdev->subsystem_vendor, | |
1300 | pdev->subsystem_device)) | |
1301 | return -ENOMEM; | |
1302 | ||
1303 | if (add_uevent_var(env, "PCI_SLOT_NAME=%s", pci_name(pdev))) | |
1304 | return -ENOMEM; | |
1305 | ||
1306 | if (add_uevent_var(env, "MODALIAS=pci:v%08Xd%08Xsv%08Xsd%08Xbc%02Xsc%02Xi%02x", | |
1307 | pdev->vendor, pdev->device, | |
1308 | pdev->subsystem_vendor, pdev->subsystem_device, | |
1309 | (u8)(pdev->class >> 16), (u8)(pdev->class >> 8), | |
1310 | (u8)(pdev->class))) | |
1311 | return -ENOMEM; | |
1312 | return 0; | |
1313 | } | |
1314 | ||
1da177e4 LT |
1315 | struct bus_type pci_bus_type = { |
1316 | .name = "pci", | |
1317 | .match = pci_bus_match, | |
312c004d | 1318 | .uevent = pci_uevent, |
b15d686a RK |
1319 | .probe = pci_device_probe, |
1320 | .remove = pci_device_remove, | |
cbd69dbb | 1321 | .shutdown = pci_device_shutdown, |
1da177e4 | 1322 | .dev_attrs = pci_dev_attrs, |
244afeca | 1323 | .bus_groups = pci_bus_groups, |
19b6e6a4 | 1324 | .drv_groups = pci_drv_groups, |
bbb44d9f | 1325 | .pm = PCI_PM_OPS_PTR, |
1da177e4 LT |
1326 | }; |
1327 | ||
1328 | static int __init pci_driver_init(void) | |
1329 | { | |
1330 | return bus_register(&pci_bus_type); | |
1331 | } | |
1332 | ||
1333 | postcore_initcall(pci_driver_init); | |
1334 | ||
9dba910e | 1335 | EXPORT_SYMBOL_GPL(pci_add_dynid); |
75865858 | 1336 | EXPORT_SYMBOL(pci_match_id); |
863b18f4 | 1337 | EXPORT_SYMBOL(__pci_register_driver); |
1da177e4 LT |
1338 | EXPORT_SYMBOL(pci_unregister_driver); |
1339 | EXPORT_SYMBOL(pci_dev_driver); | |
1340 | EXPORT_SYMBOL(pci_bus_type); | |
1341 | EXPORT_SYMBOL(pci_dev_get); | |
1342 | EXPORT_SYMBOL(pci_dev_put); |