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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 | ||
75 | get_driver(&drv->driver); | |
76 | retval = driver_attach(&drv->driver); | |
77 | put_driver(&drv->driver); | |
78 | ||
79 | return retval; | |
80 | } | |
81 | ||
82 | static void pci_free_dynids(struct pci_driver *drv) | |
83 | { | |
84 | struct pci_dynid *dynid, *n; | |
3d3c2ae1 | 85 | |
9dba910e TH |
86 | spin_lock(&drv->dynids.lock); |
87 | list_for_each_entry_safe(dynid, n, &drv->dynids.list, node) { | |
88 | list_del(&dynid->node); | |
89 | kfree(dynid); | |
90 | } | |
91 | spin_unlock(&drv->dynids.lock); | |
92 | } | |
93 | ||
94 | /* | |
95 | * Dynamic device ID manipulation via sysfs is disabled for !CONFIG_HOTPLUG | |
96 | */ | |
97 | #ifdef CONFIG_HOTPLUG | |
1da177e4 | 98 | /** |
9dba910e | 99 | * store_new_id - sysfs frontend to pci_add_dynid() |
8f7020d3 RD |
100 | * @driver: target device driver |
101 | * @buf: buffer for scanning device ID data | |
102 | * @count: input size | |
1da177e4 | 103 | * |
9dba910e | 104 | * Allow PCI IDs to be added to an existing driver via sysfs. |
1da177e4 | 105 | */ |
f8eb1005 | 106 | static ssize_t |
1da177e4 LT |
107 | store_new_id(struct device_driver *driver, const char *buf, size_t count) |
108 | { | |
1da177e4 | 109 | struct pci_driver *pdrv = to_pci_driver(driver); |
b41d6cf3 | 110 | const struct pci_device_id *ids = pdrv->id_table; |
6ba18636 | 111 | __u32 vendor, device, subvendor=PCI_ANY_ID, |
1da177e4 LT |
112 | subdevice=PCI_ANY_ID, class=0, class_mask=0; |
113 | unsigned long driver_data=0; | |
114 | int fields=0; | |
9dba910e | 115 | int retval; |
1da177e4 | 116 | |
b41d6cf3 | 117 | fields = sscanf(buf, "%x %x %x %x %x %x %lx", |
1da177e4 LT |
118 | &vendor, &device, &subvendor, &subdevice, |
119 | &class, &class_mask, &driver_data); | |
6ba18636 | 120 | if (fields < 2) |
1da177e4 LT |
121 | return -EINVAL; |
122 | ||
b41d6cf3 JD |
123 | /* Only accept driver_data values that match an existing id_table |
124 | entry */ | |
2debb4d2 CW |
125 | if (ids) { |
126 | retval = -EINVAL; | |
127 | while (ids->vendor || ids->subvendor || ids->class_mask) { | |
128 | if (driver_data == ids->driver_data) { | |
129 | retval = 0; | |
130 | break; | |
131 | } | |
132 | ids++; | |
b41d6cf3 | 133 | } |
2debb4d2 CW |
134 | if (retval) /* No match */ |
135 | return retval; | |
b41d6cf3 | 136 | } |
b41d6cf3 | 137 | |
9dba910e TH |
138 | retval = pci_add_dynid(pdrv, vendor, device, subvendor, subdevice, |
139 | class, class_mask, driver_data); | |
b19441af GKH |
140 | if (retval) |
141 | return retval; | |
1da177e4 LT |
142 | return count; |
143 | } | |
1da177e4 | 144 | static DRIVER_ATTR(new_id, S_IWUSR, NULL, store_new_id); |
1da177e4 | 145 | |
0994375e CW |
146 | /** |
147 | * store_remove_id - remove a PCI device ID from this driver | |
148 | * @driver: target device driver | |
149 | * @buf: buffer for scanning device ID data | |
150 | * @count: input size | |
151 | * | |
152 | * Removes a dynamic pci device ID to this driver. | |
153 | */ | |
154 | static ssize_t | |
155 | store_remove_id(struct device_driver *driver, const char *buf, size_t count) | |
156 | { | |
157 | struct pci_dynid *dynid, *n; | |
158 | struct pci_driver *pdrv = to_pci_driver(driver); | |
159 | __u32 vendor, device, subvendor = PCI_ANY_ID, | |
160 | subdevice = PCI_ANY_ID, class = 0, class_mask = 0; | |
161 | int fields = 0; | |
162 | int retval = -ENODEV; | |
163 | ||
164 | fields = sscanf(buf, "%x %x %x %x %x %x", | |
165 | &vendor, &device, &subvendor, &subdevice, | |
166 | &class, &class_mask); | |
167 | if (fields < 2) | |
168 | return -EINVAL; | |
169 | ||
170 | spin_lock(&pdrv->dynids.lock); | |
171 | list_for_each_entry_safe(dynid, n, &pdrv->dynids.list, node) { | |
172 | struct pci_device_id *id = &dynid->id; | |
173 | if ((id->vendor == vendor) && | |
174 | (id->device == device) && | |
175 | (subvendor == PCI_ANY_ID || id->subvendor == subvendor) && | |
176 | (subdevice == PCI_ANY_ID || id->subdevice == subdevice) && | |
177 | !((id->class ^ class) & class_mask)) { | |
178 | list_del(&dynid->node); | |
179 | kfree(dynid); | |
180 | retval = 0; | |
181 | break; | |
182 | } | |
183 | } | |
184 | spin_unlock(&pdrv->dynids.lock); | |
185 | ||
186 | if (retval) | |
187 | return retval; | |
188 | return count; | |
189 | } | |
190 | static DRIVER_ATTR(remove_id, S_IWUSR, NULL, store_remove_id); | |
191 | ||
1da177e4 LT |
192 | static int |
193 | pci_create_newid_file(struct pci_driver *drv) | |
194 | { | |
195 | int error = 0; | |
196 | if (drv->probe != NULL) | |
03d43b19 | 197 | error = driver_create_file(&drv->driver, &driver_attr_new_id); |
1da177e4 LT |
198 | return error; |
199 | } | |
200 | ||
03d43b19 GKH |
201 | static void pci_remove_newid_file(struct pci_driver *drv) |
202 | { | |
203 | driver_remove_file(&drv->driver, &driver_attr_new_id); | |
204 | } | |
0994375e CW |
205 | |
206 | static int | |
207 | pci_create_removeid_file(struct pci_driver *drv) | |
208 | { | |
209 | int error = 0; | |
210 | if (drv->probe != NULL) | |
211 | error = driver_create_file(&drv->driver,&driver_attr_remove_id); | |
212 | return error; | |
213 | } | |
214 | ||
215 | static void pci_remove_removeid_file(struct pci_driver *drv) | |
216 | { | |
217 | driver_remove_file(&drv->driver, &driver_attr_remove_id); | |
218 | } | |
1da177e4 | 219 | #else /* !CONFIG_HOTPLUG */ |
1da177e4 LT |
220 | static inline int pci_create_newid_file(struct pci_driver *drv) |
221 | { | |
222 | return 0; | |
223 | } | |
03d43b19 | 224 | static inline void pci_remove_newid_file(struct pci_driver *drv) {} |
0994375e CW |
225 | static inline int pci_create_removeid_file(struct pci_driver *drv) |
226 | { | |
227 | return 0; | |
228 | } | |
229 | static inline void pci_remove_removeid_file(struct pci_driver *drv) {} | |
1da177e4 LT |
230 | #endif |
231 | ||
232 | /** | |
75865858 | 233 | * pci_match_id - See if a pci device matches a given pci_id table |
1da177e4 | 234 | * @ids: array of PCI device id structures to search in |
75865858 GKH |
235 | * @dev: the PCI device structure to match against. |
236 | * | |
1da177e4 | 237 | * Used by a driver to check whether a PCI device present in the |
75865858 | 238 | * system is in its list of supported devices. Returns the matching |
1da177e4 | 239 | * pci_device_id structure or %NULL if there is no match. |
75865858 | 240 | * |
8b60756a | 241 | * Deprecated, don't use this as it will not catch any dynamic ids |
75865858 | 242 | * that a driver might want to check for. |
1da177e4 | 243 | */ |
75865858 GKH |
244 | const struct pci_device_id *pci_match_id(const struct pci_device_id *ids, |
245 | struct pci_dev *dev) | |
1da177e4 | 246 | { |
75865858 GKH |
247 | if (ids) { |
248 | while (ids->vendor || ids->subvendor || ids->class_mask) { | |
249 | if (pci_match_one_device(ids, dev)) | |
250 | return ids; | |
251 | ids++; | |
252 | } | |
1da177e4 LT |
253 | } |
254 | return NULL; | |
255 | } | |
256 | ||
257 | /** | |
ae9608af | 258 | * pci_match_device - Tell if a PCI device structure has a matching PCI device id structure |
75865858 | 259 | * @drv: the PCI driver to match against |
39ba487f | 260 | * @dev: the PCI device structure to match against |
75865858 GKH |
261 | * |
262 | * Used by a driver to check whether a PCI device present in the | |
263 | * system is in its list of supported devices. Returns the matching | |
264 | * pci_device_id structure or %NULL if there is no match. | |
1da177e4 | 265 | */ |
d73460d7 AB |
266 | static const struct pci_device_id *pci_match_device(struct pci_driver *drv, |
267 | struct pci_dev *dev) | |
75865858 | 268 | { |
75865858 | 269 | struct pci_dynid *dynid; |
1da177e4 | 270 | |
7461b60a | 271 | /* Look at the dynamic ids first, before the static ones */ |
75865858 GKH |
272 | spin_lock(&drv->dynids.lock); |
273 | list_for_each_entry(dynid, &drv->dynids.list, node) { | |
274 | if (pci_match_one_device(&dynid->id, dev)) { | |
275 | spin_unlock(&drv->dynids.lock); | |
276 | return &dynid->id; | |
277 | } | |
1da177e4 | 278 | } |
75865858 | 279 | spin_unlock(&drv->dynids.lock); |
7461b60a RK |
280 | |
281 | return pci_match_id(drv->id_table, dev); | |
1da177e4 LT |
282 | } |
283 | ||
873392ca RR |
284 | struct drv_dev_and_id { |
285 | struct pci_driver *drv; | |
286 | struct pci_dev *dev; | |
287 | const struct pci_device_id *id; | |
288 | }; | |
289 | ||
290 | static long local_pci_probe(void *_ddi) | |
291 | { | |
292 | struct drv_dev_and_id *ddi = _ddi; | |
f3ec4f87 AS |
293 | struct device *dev = &ddi->dev->dev; |
294 | int rc; | |
295 | ||
296 | /* Unbound PCI devices are always set to disabled and suspended. | |
297 | * During probe, the device is set to enabled and active and the | |
298 | * usage count is incremented. If the driver supports runtime PM, | |
299 | * it should call pm_runtime_put_noidle() in its probe routine and | |
300 | * pm_runtime_get_noresume() in its remove routine. | |
301 | */ | |
302 | pm_runtime_get_noresume(dev); | |
303 | pm_runtime_set_active(dev); | |
304 | pm_runtime_enable(dev); | |
305 | ||
306 | rc = ddi->drv->probe(ddi->dev, ddi->id); | |
307 | if (rc) { | |
308 | pm_runtime_disable(dev); | |
309 | pm_runtime_set_suspended(dev); | |
310 | pm_runtime_put_noidle(dev); | |
311 | } | |
312 | return rc; | |
873392ca RR |
313 | } |
314 | ||
d42c6997 AK |
315 | static int pci_call_probe(struct pci_driver *drv, struct pci_dev *dev, |
316 | const struct pci_device_id *id) | |
317 | { | |
873392ca RR |
318 | int error, node; |
319 | struct drv_dev_and_id ddi = { drv, dev, id }; | |
320 | ||
321 | /* Execute driver initialization on node where the device's | |
322 | bus is attached to. This way the driver likely allocates | |
323 | its local memory on the right node without any need to | |
324 | change it. */ | |
325 | node = dev_to_node(&dev->dev); | |
f70316da | 326 | if (node >= 0) { |
873392ca | 327 | int cpu; |
873392ca RR |
328 | |
329 | get_online_cpus(); | |
a70f7302 | 330 | cpu = cpumask_any_and(cpumask_of_node(node), cpu_online_mask); |
873392ca RR |
331 | if (cpu < nr_cpu_ids) |
332 | error = work_on_cpu(cpu, local_pci_probe, &ddi); | |
333 | else | |
334 | error = local_pci_probe(&ddi); | |
335 | put_online_cpus(); | |
336 | } else | |
337 | error = local_pci_probe(&ddi); | |
d42c6997 AK |
338 | return error; |
339 | } | |
340 | ||
1da177e4 | 341 | /** |
23ea3793 | 342 | * __pci_device_probe - check if a driver wants to claim a specific PCI device |
8f7020d3 RD |
343 | * @drv: driver to call to check if it wants the PCI device |
344 | * @pci_dev: PCI device being probed | |
1da177e4 | 345 | * |
8f7020d3 | 346 | * returns 0 on success, else error. |
1da177e4 LT |
347 | * side-effect: pci_dev->driver is set to drv when drv claims pci_dev. |
348 | */ | |
349 | static int | |
350 | __pci_device_probe(struct pci_driver *drv, struct pci_dev *pci_dev) | |
75865858 GKH |
351 | { |
352 | const struct pci_device_id *id; | |
1da177e4 LT |
353 | int error = 0; |
354 | ||
355 | if (!pci_dev->driver && drv->probe) { | |
75865858 GKH |
356 | error = -ENODEV; |
357 | ||
358 | id = pci_match_device(drv, pci_dev); | |
359 | if (id) | |
d42c6997 | 360 | error = pci_call_probe(drv, pci_dev, id); |
75865858 GKH |
361 | if (error >= 0) { |
362 | pci_dev->driver = drv; | |
363 | error = 0; | |
364 | } | |
1da177e4 LT |
365 | } |
366 | return error; | |
367 | } | |
368 | ||
369 | static int pci_device_probe(struct device * dev) | |
370 | { | |
371 | int error = 0; | |
372 | struct pci_driver *drv; | |
373 | struct pci_dev *pci_dev; | |
374 | ||
375 | drv = to_pci_driver(dev->driver); | |
376 | pci_dev = to_pci_dev(dev); | |
377 | pci_dev_get(pci_dev); | |
378 | error = __pci_device_probe(drv, pci_dev); | |
379 | if (error) | |
380 | pci_dev_put(pci_dev); | |
381 | ||
382 | return error; | |
383 | } | |
384 | ||
385 | static int pci_device_remove(struct device * dev) | |
386 | { | |
387 | struct pci_dev * pci_dev = to_pci_dev(dev); | |
388 | struct pci_driver * drv = pci_dev->driver; | |
389 | ||
390 | if (drv) { | |
f3ec4f87 AS |
391 | if (drv->remove) { |
392 | pm_runtime_get_sync(dev); | |
1da177e4 | 393 | drv->remove(pci_dev); |
f3ec4f87 AS |
394 | pm_runtime_put_noidle(dev); |
395 | } | |
1da177e4 LT |
396 | pci_dev->driver = NULL; |
397 | } | |
398 | ||
f3ec4f87 AS |
399 | /* Undo the runtime PM settings in local_pci_probe() */ |
400 | pm_runtime_disable(dev); | |
401 | pm_runtime_set_suspended(dev); | |
402 | pm_runtime_put_noidle(dev); | |
403 | ||
2449e06a SL |
404 | /* |
405 | * If the device is still on, set the power state as "unknown", | |
406 | * since it might change by the next time we load the driver. | |
407 | */ | |
408 | if (pci_dev->current_state == PCI_D0) | |
409 | pci_dev->current_state = PCI_UNKNOWN; | |
410 | ||
1da177e4 LT |
411 | /* |
412 | * We would love to complain here if pci_dev->is_enabled is set, that | |
413 | * the driver should have called pci_disable_device(), but the | |
414 | * unfortunate fact is there are too many odd BIOS and bridge setups | |
415 | * that don't like drivers doing that all of the time. | |
416 | * Oh well, we can dream of sane hardware when we sleep, no matter how | |
417 | * horrible the crap we have to deal with is when we are awake... | |
418 | */ | |
419 | ||
420 | pci_dev_put(pci_dev); | |
421 | return 0; | |
422 | } | |
423 | ||
bbb44d9f RW |
424 | static void pci_device_shutdown(struct device *dev) |
425 | { | |
426 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
427 | struct pci_driver *drv = pci_dev->driver; | |
428 | ||
429 | if (drv && drv->shutdown) | |
430 | drv->shutdown(pci_dev); | |
431 | pci_msi_shutdown(pci_dev); | |
432 | pci_msix_shutdown(pci_dev); | |
433 | } | |
434 | ||
aa338601 | 435 | #ifdef CONFIG_PM |
6cbf8214 RW |
436 | |
437 | /* Auxiliary functions used for system resume and run-time resume. */ | |
438 | ||
439 | /** | |
440 | * pci_restore_standard_config - restore standard config registers of PCI device | |
441 | * @pci_dev: PCI device to handle | |
442 | */ | |
443 | static int pci_restore_standard_config(struct pci_dev *pci_dev) | |
444 | { | |
445 | pci_update_current_state(pci_dev, PCI_UNKNOWN); | |
446 | ||
447 | if (pci_dev->current_state != PCI_D0) { | |
448 | int error = pci_set_power_state(pci_dev, PCI_D0); | |
449 | if (error) | |
450 | return error; | |
451 | } | |
452 | ||
1d3c16a8 JM |
453 | pci_restore_state(pci_dev); |
454 | return 0; | |
6cbf8214 RW |
455 | } |
456 | ||
457 | static void pci_pm_default_resume_early(struct pci_dev *pci_dev) | |
458 | { | |
459 | pci_restore_standard_config(pci_dev); | |
460 | pci_fixup_device(pci_fixup_resume_early, pci_dev); | |
461 | } | |
462 | ||
463 | #endif | |
464 | ||
bbb44d9f RW |
465 | #ifdef CONFIG_PM_SLEEP |
466 | ||
fa58d305 RW |
467 | /* |
468 | * Default "suspend" method for devices that have no driver provided suspend, | |
469 | * or not even a driver at all (second part). | |
bbb44d9f | 470 | */ |
bb808945 | 471 | static void pci_pm_set_unknown_state(struct pci_dev *pci_dev) |
bbb44d9f | 472 | { |
bbb44d9f RW |
473 | /* |
474 | * mark its power state as "unknown", since we don't know if | |
475 | * e.g. the BIOS will change its device state when we suspend. | |
476 | */ | |
477 | if (pci_dev->current_state == PCI_D0) | |
478 | pci_dev->current_state = PCI_UNKNOWN; | |
479 | } | |
480 | ||
355a72d7 RW |
481 | /* |
482 | * Default "resume" method for devices that have no driver provided resume, | |
483 | * or not even a driver at all (second part). | |
484 | */ | |
bb808945 | 485 | static int pci_pm_reenable_device(struct pci_dev *pci_dev) |
355a72d7 RW |
486 | { |
487 | int retval; | |
488 | ||
bbb44d9f RW |
489 | /* if the device was enabled before suspend, reenable */ |
490 | retval = pci_reenable_device(pci_dev); | |
491 | /* | |
492 | * if the device was busmaster before the suspend, make it busmaster | |
493 | * again | |
494 | */ | |
495 | if (pci_dev->is_busmaster) | |
496 | pci_set_master(pci_dev); | |
497 | ||
498 | return retval; | |
499 | } | |
500 | ||
501 | static int pci_legacy_suspend(struct device *dev, pm_message_t state) | |
1da177e4 LT |
502 | { |
503 | struct pci_dev * pci_dev = to_pci_dev(dev); | |
504 | struct pci_driver * drv = pci_dev->driver; | |
46939f8b | 505 | |
02669492 | 506 | if (drv && drv->suspend) { |
99dadce8 | 507 | pci_power_t prev = pci_dev->current_state; |
46939f8b | 508 | int error; |
aa8c6c93 | 509 | |
57ef8026 FP |
510 | error = drv->suspend(pci_dev, state); |
511 | suspend_report_result(drv->suspend, error); | |
512 | if (error) | |
513 | return error; | |
aa8c6c93 | 514 | |
46939f8b | 515 | if (!pci_dev->state_saved && pci_dev->current_state != PCI_D0 |
99dadce8 RW |
516 | && pci_dev->current_state != PCI_UNKNOWN) { |
517 | WARN_ONCE(pci_dev->current_state != prev, | |
518 | "PCI PM: Device state not saved by %pF\n", | |
519 | drv->suspend); | |
99dadce8 | 520 | } |
02669492 | 521 | } |
ad8cfa1d RW |
522 | |
523 | pci_fixup_device(pci_fixup_suspend, pci_dev); | |
524 | ||
46939f8b | 525 | return 0; |
1da177e4 LT |
526 | } |
527 | ||
bbb44d9f | 528 | static int pci_legacy_suspend_late(struct device *dev, pm_message_t state) |
cbd69dbb LT |
529 | { |
530 | struct pci_dev * pci_dev = to_pci_dev(dev); | |
531 | struct pci_driver * drv = pci_dev->driver; | |
cbd69dbb LT |
532 | |
533 | if (drv && drv->suspend_late) { | |
46939f8b RW |
534 | pci_power_t prev = pci_dev->current_state; |
535 | int error; | |
536 | ||
57ef8026 FP |
537 | error = drv->suspend_late(pci_dev, state); |
538 | suspend_report_result(drv->suspend_late, error); | |
46939f8b RW |
539 | if (error) |
540 | return error; | |
541 | ||
542 | if (!pci_dev->state_saved && pci_dev->current_state != PCI_D0 | |
543 | && pci_dev->current_state != PCI_UNKNOWN) { | |
544 | WARN_ONCE(pci_dev->current_state != prev, | |
545 | "PCI PM: Device state not saved by %pF\n", | |
546 | drv->suspend_late); | |
547 | return 0; | |
548 | } | |
cbd69dbb | 549 | } |
46939f8b RW |
550 | |
551 | if (!pci_dev->state_saved) | |
552 | pci_save_state(pci_dev); | |
553 | ||
554 | pci_pm_set_unknown_state(pci_dev); | |
555 | ||
556 | return 0; | |
cbd69dbb | 557 | } |
1da177e4 | 558 | |
f6dc1e5e RW |
559 | static int pci_legacy_resume_early(struct device *dev) |
560 | { | |
f6dc1e5e RW |
561 | struct pci_dev * pci_dev = to_pci_dev(dev); |
562 | struct pci_driver * drv = pci_dev->driver; | |
563 | ||
aa8c6c93 RW |
564 | return drv && drv->resume_early ? |
565 | drv->resume_early(pci_dev) : 0; | |
f6dc1e5e RW |
566 | } |
567 | ||
bbb44d9f | 568 | static int pci_legacy_resume(struct device *dev) |
1da177e4 LT |
569 | { |
570 | struct pci_dev * pci_dev = to_pci_dev(dev); | |
571 | struct pci_driver * drv = pci_dev->driver; | |
572 | ||
ad8cfa1d RW |
573 | pci_fixup_device(pci_fixup_resume, pci_dev); |
574 | ||
aa8c6c93 RW |
575 | return drv && drv->resume ? |
576 | drv->resume(pci_dev) : pci_pm_reenable_device(pci_dev); | |
1da177e4 LT |
577 | } |
578 | ||
571ff758 RW |
579 | /* Auxiliary functions used by the new power management framework */ |
580 | ||
5294e256 | 581 | static void pci_pm_default_resume(struct pci_dev *pci_dev) |
571ff758 | 582 | { |
73410429 RW |
583 | pci_fixup_device(pci_fixup_resume, pci_dev); |
584 | ||
5294e256 RW |
585 | if (!pci_is_bridge(pci_dev)) |
586 | pci_enable_wake(pci_dev, PCI_D0, false); | |
571ff758 RW |
587 | } |
588 | ||
5294e256 | 589 | static void pci_pm_default_suspend(struct pci_dev *pci_dev) |
73410429 | 590 | { |
5294e256 | 591 | /* Disable non-bridge devices without PM support */ |
cbbc2f6b RW |
592 | if (!pci_is_bridge(pci_dev)) |
593 | pci_disable_enabled_device(pci_dev); | |
73410429 RW |
594 | } |
595 | ||
07e836e8 RW |
596 | static bool pci_has_legacy_pm_support(struct pci_dev *pci_dev) |
597 | { | |
598 | struct pci_driver *drv = pci_dev->driver; | |
bb808945 | 599 | bool ret = drv && (drv->suspend || drv->suspend_late || drv->resume |
07e836e8 | 600 | || drv->resume_early); |
bb808945 RW |
601 | |
602 | /* | |
603 | * Legacy PM support is used by default, so warn if the new framework is | |
604 | * supported as well. Drivers are supposed to support either the | |
605 | * former, or the latter, but not both at the same time. | |
606 | */ | |
607 | WARN_ON(ret && drv->driver.pm); | |
608 | ||
609 | return ret; | |
07e836e8 RW |
610 | } |
611 | ||
571ff758 RW |
612 | /* New power management framework */ |
613 | ||
bbb44d9f RW |
614 | static int pci_pm_prepare(struct device *dev) |
615 | { | |
616 | struct device_driver *drv = dev->driver; | |
617 | int error = 0; | |
618 | ||
eea3fc03 RW |
619 | /* |
620 | * If a PCI device configured to wake up the system from sleep states | |
621 | * has been suspended at run time and there's a resume request pending | |
622 | * for it, this is equivalent to the device signaling wakeup, so the | |
623 | * system suspend operation should be aborted. | |
624 | */ | |
625 | pm_runtime_get_noresume(dev); | |
626 | if (pm_runtime_barrier(dev) && device_may_wakeup(dev)) | |
627 | pm_wakeup_event(dev, 0); | |
628 | ||
629 | if (pm_wakeup_pending()) { | |
630 | pm_runtime_put_sync(dev); | |
631 | return -EBUSY; | |
632 | } | |
633 | ||
6cbf8214 RW |
634 | /* |
635 | * PCI devices suspended at run time need to be resumed at this | |
636 | * point, because in general it is necessary to reconfigure them for | |
637 | * system suspend. Namely, if the device is supposed to wake up the | |
638 | * system from the sleep state, we may need to reconfigure it for this | |
639 | * purpose. In turn, if the device is not supposed to wake up the | |
640 | * system from the sleep state, we'll have to prevent it from signaling | |
641 | * wake-up. | |
642 | */ | |
eea3fc03 | 643 | pm_runtime_resume(dev); |
6cbf8214 | 644 | |
bbb44d9f RW |
645 | if (drv && drv->pm && drv->pm->prepare) |
646 | error = drv->pm->prepare(dev); | |
647 | ||
648 | return error; | |
649 | } | |
650 | ||
651 | static void pci_pm_complete(struct device *dev) | |
652 | { | |
653 | struct device_driver *drv = dev->driver; | |
654 | ||
655 | if (drv && drv->pm && drv->pm->complete) | |
656 | drv->pm->complete(dev); | |
a5f76d5e RW |
657 | |
658 | pm_runtime_put_sync(dev); | |
bbb44d9f RW |
659 | } |
660 | ||
6cbf8214 RW |
661 | #else /* !CONFIG_PM_SLEEP */ |
662 | ||
663 | #define pci_pm_prepare NULL | |
664 | #define pci_pm_complete NULL | |
665 | ||
666 | #endif /* !CONFIG_PM_SLEEP */ | |
667 | ||
bbb44d9f RW |
668 | #ifdef CONFIG_SUSPEND |
669 | ||
670 | static int pci_pm_suspend(struct device *dev) | |
671 | { | |
672 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
8150f32b | 673 | const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; |
bbb44d9f | 674 | |
ad8cfa1d RW |
675 | if (pci_has_legacy_pm_support(pci_dev)) |
676 | return pci_legacy_suspend(dev, PMSG_SUSPEND); | |
bb808945 | 677 | |
5294e256 RW |
678 | if (!pm) { |
679 | pci_pm_default_suspend(pci_dev); | |
680 | goto Fixup; | |
681 | } | |
682 | ||
5294e256 RW |
683 | if (pm->suspend) { |
684 | pci_power_t prev = pci_dev->current_state; | |
685 | int error; | |
686 | ||
ddb7c9d2 RW |
687 | error = pm->suspend(dev); |
688 | suspend_report_result(pm->suspend, error); | |
5294e256 RW |
689 | if (error) |
690 | return error; | |
691 | ||
46939f8b | 692 | if (!pci_dev->state_saved && pci_dev->current_state != PCI_D0 |
5294e256 RW |
693 | && pci_dev->current_state != PCI_UNKNOWN) { |
694 | WARN_ONCE(pci_dev->current_state != prev, | |
695 | "PCI PM: State of device not saved by %pF\n", | |
696 | pm->suspend); | |
5294e256 | 697 | } |
bbb44d9f | 698 | } |
fa58d305 | 699 | |
5294e256 RW |
700 | Fixup: |
701 | pci_fixup_device(pci_fixup_suspend, pci_dev); | |
702 | ||
703 | return 0; | |
bbb44d9f RW |
704 | } |
705 | ||
706 | static int pci_pm_suspend_noirq(struct device *dev) | |
c8958177 | 707 | { |
355a72d7 | 708 | struct pci_dev *pci_dev = to_pci_dev(dev); |
8150f32b | 709 | const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; |
c8958177 | 710 | |
bb808945 RW |
711 | if (pci_has_legacy_pm_support(pci_dev)) |
712 | return pci_legacy_suspend_late(dev, PMSG_SUSPEND); | |
713 | ||
931ff68a RW |
714 | if (!pm) { |
715 | pci_save_state(pci_dev); | |
46939f8b | 716 | return 0; |
931ff68a | 717 | } |
46939f8b RW |
718 | |
719 | if (pm->suspend_noirq) { | |
720 | pci_power_t prev = pci_dev->current_state; | |
721 | int error; | |
722 | ||
723 | error = pm->suspend_noirq(dev); | |
724 | suspend_report_result(pm->suspend_noirq, error); | |
725 | if (error) | |
726 | return error; | |
727 | ||
728 | if (!pci_dev->state_saved && pci_dev->current_state != PCI_D0 | |
729 | && pci_dev->current_state != PCI_UNKNOWN) { | |
730 | WARN_ONCE(pci_dev->current_state != prev, | |
731 | "PCI PM: State of device not saved by %pF\n", | |
732 | pm->suspend_noirq); | |
733 | return 0; | |
734 | } | |
bbb44d9f RW |
735 | } |
736 | ||
46939f8b RW |
737 | if (!pci_dev->state_saved) { |
738 | pci_save_state(pci_dev); | |
739 | if (!pci_is_bridge(pci_dev)) | |
740 | pci_prepare_to_sleep(pci_dev); | |
741 | } | |
d67e37d7 | 742 | |
46939f8b RW |
743 | pci_pm_set_unknown_state(pci_dev); |
744 | ||
745 | return 0; | |
c8958177 | 746 | } |
1da177e4 | 747 | |
f6dc1e5e | 748 | static int pci_pm_resume_noirq(struct device *dev) |
bbb44d9f RW |
749 | { |
750 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
751 | struct device_driver *drv = dev->driver; | |
355a72d7 | 752 | int error = 0; |
bbb44d9f | 753 | |
6cbf8214 | 754 | pci_pm_default_resume_early(pci_dev); |
aa8c6c93 | 755 | |
ad8cfa1d | 756 | if (pci_has_legacy_pm_support(pci_dev)) |
f6dc1e5e | 757 | return pci_legacy_resume_early(dev); |
bb808945 | 758 | |
f6dc1e5e RW |
759 | if (drv && drv->pm && drv->pm->resume_noirq) |
760 | error = drv->pm->resume_noirq(dev); | |
bbb44d9f RW |
761 | |
762 | return error; | |
763 | } | |
764 | ||
f6dc1e5e | 765 | static int pci_pm_resume(struct device *dev) |
bbb44d9f | 766 | { |
355a72d7 | 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 RW |
769 | int error = 0; |
770 | ||
418e4da3 RW |
771 | /* |
772 | * This is necessary for the suspend error path in which resume is | |
773 | * called without restoring the standard config registers of the device. | |
774 | */ | |
775 | if (pci_dev->state_saved) | |
776 | pci_restore_standard_config(pci_dev); | |
777 | ||
ad8cfa1d | 778 | if (pci_has_legacy_pm_support(pci_dev)) |
f6dc1e5e | 779 | return pci_legacy_resume(dev); |
bb808945 | 780 | |
5294e256 | 781 | pci_pm_default_resume(pci_dev); |
73410429 | 782 | |
5294e256 RW |
783 | if (pm) { |
784 | if (pm->resume) | |
785 | error = pm->resume(dev); | |
786 | } else { | |
787 | pci_pm_reenable_device(pci_dev); | |
788 | } | |
bbb44d9f | 789 | |
999cce4a | 790 | return error; |
bbb44d9f RW |
791 | } |
792 | ||
793 | #else /* !CONFIG_SUSPEND */ | |
794 | ||
795 | #define pci_pm_suspend NULL | |
796 | #define pci_pm_suspend_noirq NULL | |
797 | #define pci_pm_resume NULL | |
798 | #define pci_pm_resume_noirq NULL | |
799 | ||
800 | #endif /* !CONFIG_SUSPEND */ | |
801 | ||
1f112cee | 802 | #ifdef CONFIG_HIBERNATE_CALLBACKS |
bbb44d9f RW |
803 | |
804 | static int pci_pm_freeze(struct device *dev) | |
805 | { | |
806 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
8150f32b | 807 | const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; |
bbb44d9f | 808 | |
ad8cfa1d RW |
809 | if (pci_has_legacy_pm_support(pci_dev)) |
810 | return pci_legacy_suspend(dev, PMSG_FREEZE); | |
bb808945 | 811 | |
5294e256 RW |
812 | if (!pm) { |
813 | pci_pm_default_suspend(pci_dev); | |
814 | return 0; | |
bbb44d9f RW |
815 | } |
816 | ||
5294e256 RW |
817 | if (pm->freeze) { |
818 | int error; | |
819 | ||
820 | error = pm->freeze(dev); | |
821 | suspend_report_result(pm->freeze, error); | |
822 | if (error) | |
823 | return error; | |
824 | } | |
825 | ||
5294e256 | 826 | return 0; |
bbb44d9f RW |
827 | } |
828 | ||
829 | static int pci_pm_freeze_noirq(struct device *dev) | |
830 | { | |
355a72d7 | 831 | struct pci_dev *pci_dev = to_pci_dev(dev); |
adf09493 | 832 | struct device_driver *drv = dev->driver; |
bbb44d9f | 833 | |
bb808945 RW |
834 | if (pci_has_legacy_pm_support(pci_dev)) |
835 | return pci_legacy_suspend_late(dev, PMSG_FREEZE); | |
836 | ||
d67e37d7 | 837 | if (drv && drv->pm && drv->pm->freeze_noirq) { |
46939f8b RW |
838 | int error; |
839 | ||
d67e37d7 RW |
840 | error = drv->pm->freeze_noirq(dev); |
841 | suspend_report_result(drv->pm->freeze_noirq, error); | |
46939f8b RW |
842 | if (error) |
843 | return error; | |
bbb44d9f RW |
844 | } |
845 | ||
46939f8b RW |
846 | if (!pci_dev->state_saved) |
847 | pci_save_state(pci_dev); | |
d67e37d7 | 848 | |
46939f8b RW |
849 | pci_pm_set_unknown_state(pci_dev); |
850 | ||
851 | return 0; | |
bbb44d9f RW |
852 | } |
853 | ||
f6dc1e5e | 854 | static int pci_pm_thaw_noirq(struct device *dev) |
bbb44d9f | 855 | { |
355a72d7 | 856 | struct pci_dev *pci_dev = to_pci_dev(dev); |
bbb44d9f RW |
857 | struct device_driver *drv = dev->driver; |
858 | int error = 0; | |
859 | ||
ad8cfa1d | 860 | if (pci_has_legacy_pm_support(pci_dev)) |
f6dc1e5e | 861 | return pci_legacy_resume_early(dev); |
bb808945 | 862 | |
f6dc1e5e | 863 | pci_update_current_state(pci_dev, PCI_D0); |
d67e37d7 | 864 | |
f6dc1e5e RW |
865 | if (drv && drv->pm && drv->pm->thaw_noirq) |
866 | error = drv->pm->thaw_noirq(dev); | |
bbb44d9f RW |
867 | |
868 | return error; | |
869 | } | |
870 | ||
f6dc1e5e | 871 | static int pci_pm_thaw(struct device *dev) |
bbb44d9f | 872 | { |
355a72d7 | 873 | struct pci_dev *pci_dev = to_pci_dev(dev); |
8150f32b | 874 | const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; |
bbb44d9f RW |
875 | int error = 0; |
876 | ||
ad8cfa1d | 877 | if (pci_has_legacy_pm_support(pci_dev)) |
f6dc1e5e | 878 | return pci_legacy_resume(dev); |
bb808945 | 879 | |
5294e256 RW |
880 | if (pm) { |
881 | if (pm->thaw) | |
882 | error = pm->thaw(dev); | |
883 | } else { | |
884 | pci_pm_reenable_device(pci_dev); | |
885 | } | |
bbb44d9f | 886 | |
4b77b0a2 RW |
887 | pci_dev->state_saved = false; |
888 | ||
bbb44d9f RW |
889 | return error; |
890 | } | |
891 | ||
892 | static int pci_pm_poweroff(struct device *dev) | |
893 | { | |
355a72d7 | 894 | struct pci_dev *pci_dev = to_pci_dev(dev); |
8150f32b | 895 | const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; |
bbb44d9f | 896 | |
ad8cfa1d RW |
897 | if (pci_has_legacy_pm_support(pci_dev)) |
898 | return pci_legacy_suspend(dev, PMSG_HIBERNATE); | |
bb808945 | 899 | |
5294e256 RW |
900 | if (!pm) { |
901 | pci_pm_default_suspend(pci_dev); | |
902 | goto Fixup; | |
903 | } | |
904 | ||
5294e256 | 905 | if (pm->poweroff) { |
46939f8b RW |
906 | int error; |
907 | ||
ddb7c9d2 RW |
908 | error = pm->poweroff(dev); |
909 | suspend_report_result(pm->poweroff, error); | |
46939f8b RW |
910 | if (error) |
911 | return error; | |
bbb44d9f RW |
912 | } |
913 | ||
5294e256 RW |
914 | Fixup: |
915 | pci_fixup_device(pci_fixup_suspend, pci_dev); | |
c9b9972b | 916 | |
46939f8b | 917 | return 0; |
bbb44d9f RW |
918 | } |
919 | ||
920 | static int pci_pm_poweroff_noirq(struct device *dev) | |
921 | { | |
46939f8b | 922 | struct pci_dev *pci_dev = to_pci_dev(dev); |
adf09493 | 923 | struct device_driver *drv = dev->driver; |
bbb44d9f | 924 | |
bb808945 RW |
925 | if (pci_has_legacy_pm_support(to_pci_dev(dev))) |
926 | return pci_legacy_suspend_late(dev, PMSG_HIBERNATE); | |
927 | ||
46939f8b RW |
928 | if (!drv || !drv->pm) |
929 | return 0; | |
930 | ||
931 | if (drv->pm->poweroff_noirq) { | |
932 | int error; | |
933 | ||
d67e37d7 RW |
934 | error = drv->pm->poweroff_noirq(dev); |
935 | suspend_report_result(drv->pm->poweroff_noirq, error); | |
46939f8b RW |
936 | if (error) |
937 | return error; | |
bbb44d9f RW |
938 | } |
939 | ||
46939f8b RW |
940 | if (!pci_dev->state_saved && !pci_is_bridge(pci_dev)) |
941 | pci_prepare_to_sleep(pci_dev); | |
942 | ||
943 | return 0; | |
bbb44d9f RW |
944 | } |
945 | ||
f6dc1e5e | 946 | static int pci_pm_restore_noirq(struct device *dev) |
bbb44d9f RW |
947 | { |
948 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
949 | struct device_driver *drv = dev->driver; | |
355a72d7 | 950 | int error = 0; |
bbb44d9f | 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 | ||
418e4da3 RW |
969 | /* |
970 | * This is necessary for the hibernation error path in which restore is | |
971 | * called without restoring the standard config registers of the device. | |
972 | */ | |
973 | if (pci_dev->state_saved) | |
974 | pci_restore_standard_config(pci_dev); | |
975 | ||
ad8cfa1d | 976 | if (pci_has_legacy_pm_support(pci_dev)) |
f6dc1e5e | 977 | return pci_legacy_resume(dev); |
bb808945 | 978 | |
5294e256 | 979 | pci_pm_default_resume(pci_dev); |
73410429 | 980 | |
5294e256 RW |
981 | if (pm) { |
982 | if (pm->restore) | |
983 | error = pm->restore(dev); | |
984 | } else { | |
985 | pci_pm_reenable_device(pci_dev); | |
986 | } | |
bbb44d9f RW |
987 | |
988 | return error; | |
c8958177 | 989 | } |
1da177e4 | 990 | |
1f112cee | 991 | #else /* !CONFIG_HIBERNATE_CALLBACKS */ |
bbb44d9f RW |
992 | |
993 | #define pci_pm_freeze NULL | |
994 | #define pci_pm_freeze_noirq NULL | |
995 | #define pci_pm_thaw NULL | |
996 | #define pci_pm_thaw_noirq NULL | |
997 | #define pci_pm_poweroff NULL | |
998 | #define pci_pm_poweroff_noirq NULL | |
999 | #define pci_pm_restore NULL | |
1000 | #define pci_pm_restore_noirq NULL | |
1001 | ||
1f112cee | 1002 | #endif /* !CONFIG_HIBERNATE_CALLBACKS */ |
bbb44d9f | 1003 | |
6cbf8214 RW |
1004 | #ifdef CONFIG_PM_RUNTIME |
1005 | ||
1006 | static int pci_pm_runtime_suspend(struct device *dev) | |
1007 | { | |
1008 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
1009 | const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; | |
1010 | pci_power_t prev = pci_dev->current_state; | |
1011 | int error; | |
1012 | ||
1013 | if (!pm || !pm->runtime_suspend) | |
1014 | return -ENOSYS; | |
1015 | ||
1016 | error = pm->runtime_suspend(dev); | |
1017 | suspend_report_result(pm->runtime_suspend, error); | |
1018 | if (error) | |
1019 | return error; | |
1020 | ||
1021 | pci_fixup_device(pci_fixup_suspend, pci_dev); | |
1022 | ||
1023 | if (!pci_dev->state_saved && pci_dev->current_state != PCI_D0 | |
1024 | && pci_dev->current_state != PCI_UNKNOWN) { | |
1025 | WARN_ONCE(pci_dev->current_state != prev, | |
1026 | "PCI PM: State of device not saved by %pF\n", | |
1027 | pm->runtime_suspend); | |
1028 | return 0; | |
1029 | } | |
1030 | ||
1031 | if (!pci_dev->state_saved) | |
1032 | pci_save_state(pci_dev); | |
1033 | ||
1034 | pci_finish_runtime_suspend(pci_dev); | |
1035 | ||
1036 | return 0; | |
1037 | } | |
1038 | ||
1039 | static int pci_pm_runtime_resume(struct device *dev) | |
1040 | { | |
1041 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
1042 | const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; | |
1043 | ||
1044 | if (!pm || !pm->runtime_resume) | |
1045 | return -ENOSYS; | |
1046 | ||
1047 | pci_pm_default_resume_early(pci_dev); | |
1048 | __pci_enable_wake(pci_dev, PCI_D0, true, false); | |
1049 | pci_fixup_device(pci_fixup_resume, pci_dev); | |
1050 | ||
1051 | return pm->runtime_resume(dev); | |
1052 | } | |
1053 | ||
1054 | static int pci_pm_runtime_idle(struct device *dev) | |
1055 | { | |
1056 | const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; | |
1057 | ||
1058 | if (!pm) | |
1059 | return -ENOSYS; | |
1060 | ||
1061 | if (pm->runtime_idle) { | |
1062 | int ret = pm->runtime_idle(dev); | |
1063 | if (ret) | |
1064 | return ret; | |
1065 | } | |
1066 | ||
1067 | pm_runtime_suspend(dev); | |
1068 | ||
1069 | return 0; | |
1070 | } | |
1071 | ||
1072 | #else /* !CONFIG_PM_RUNTIME */ | |
1073 | ||
1074 | #define pci_pm_runtime_suspend NULL | |
1075 | #define pci_pm_runtime_resume NULL | |
1076 | #define pci_pm_runtime_idle NULL | |
1077 | ||
1078 | #endif /* !CONFIG_PM_RUNTIME */ | |
1079 | ||
aa338601 | 1080 | #ifdef CONFIG_PM |
6cbf8214 | 1081 | |
8150f32b | 1082 | const struct dev_pm_ops pci_dev_pm_ops = { |
adf09493 RW |
1083 | .prepare = pci_pm_prepare, |
1084 | .complete = pci_pm_complete, | |
1085 | .suspend = pci_pm_suspend, | |
1086 | .resume = pci_pm_resume, | |
1087 | .freeze = pci_pm_freeze, | |
1088 | .thaw = pci_pm_thaw, | |
1089 | .poweroff = pci_pm_poweroff, | |
1090 | .restore = pci_pm_restore, | |
bbb44d9f RW |
1091 | .suspend_noirq = pci_pm_suspend_noirq, |
1092 | .resume_noirq = pci_pm_resume_noirq, | |
1093 | .freeze_noirq = pci_pm_freeze_noirq, | |
1094 | .thaw_noirq = pci_pm_thaw_noirq, | |
1095 | .poweroff_noirq = pci_pm_poweroff_noirq, | |
1096 | .restore_noirq = pci_pm_restore_noirq, | |
6cbf8214 RW |
1097 | .runtime_suspend = pci_pm_runtime_suspend, |
1098 | .runtime_resume = pci_pm_runtime_resume, | |
1099 | .runtime_idle = pci_pm_runtime_idle, | |
bbb44d9f RW |
1100 | }; |
1101 | ||
adf09493 | 1102 | #define PCI_PM_OPS_PTR (&pci_dev_pm_ops) |
bbb44d9f | 1103 | |
6cbf8214 | 1104 | #else /* !COMFIG_PM_OPS */ |
bbb44d9f RW |
1105 | |
1106 | #define PCI_PM_OPS_PTR NULL | |
1107 | ||
6cbf8214 | 1108 | #endif /* !COMFIG_PM_OPS */ |
bbb44d9f | 1109 | |
1da177e4 | 1110 | /** |
863b18f4 | 1111 | * __pci_register_driver - register a new pci driver |
1da177e4 | 1112 | * @drv: the driver structure to register |
863b18f4 | 1113 | * @owner: owner module of drv |
f95d882d | 1114 | * @mod_name: module name string |
1da177e4 LT |
1115 | * |
1116 | * Adds the driver structure to the list of registered drivers. | |
1117 | * Returns a negative value on error, otherwise 0. | |
eaae4b3a | 1118 | * If no error occurred, the driver remains registered even if |
1da177e4 LT |
1119 | * no device was claimed during registration. |
1120 | */ | |
725522b5 GKH |
1121 | int __pci_register_driver(struct pci_driver *drv, struct module *owner, |
1122 | const char *mod_name) | |
1da177e4 LT |
1123 | { |
1124 | int error; | |
1125 | ||
1126 | /* initialize common driver fields */ | |
1127 | drv->driver.name = drv->name; | |
1128 | drv->driver.bus = &pci_bus_type; | |
863b18f4 | 1129 | drv->driver.owner = owner; |
725522b5 | 1130 | drv->driver.mod_name = mod_name; |
50b00755 | 1131 | |
75865858 GKH |
1132 | spin_lock_init(&drv->dynids.lock); |
1133 | INIT_LIST_HEAD(&drv->dynids.list); | |
1da177e4 LT |
1134 | |
1135 | /* register with core */ | |
1136 | error = driver_register(&drv->driver); | |
50bf14b3 | 1137 | if (error) |
0994375e | 1138 | goto out; |
1da177e4 | 1139 | |
50bf14b3 AM |
1140 | error = pci_create_newid_file(drv); |
1141 | if (error) | |
0994375e | 1142 | goto out_newid; |
1da177e4 | 1143 | |
0994375e CW |
1144 | error = pci_create_removeid_file(drv); |
1145 | if (error) | |
1146 | goto out_removeid; | |
1147 | out: | |
1da177e4 | 1148 | return error; |
0994375e CW |
1149 | |
1150 | out_removeid: | |
1151 | pci_remove_newid_file(drv); | |
1152 | out_newid: | |
1153 | driver_unregister(&drv->driver); | |
1154 | goto out; | |
1da177e4 LT |
1155 | } |
1156 | ||
1157 | /** | |
1158 | * pci_unregister_driver - unregister a pci driver | |
1159 | * @drv: the driver structure to unregister | |
1160 | * | |
1161 | * Deletes the driver structure from the list of registered PCI drivers, | |
1162 | * gives it a chance to clean up by calling its remove() function for | |
1163 | * each device it was responsible for, and marks those devices as | |
1164 | * driverless. | |
1165 | */ | |
1166 | ||
1167 | void | |
1168 | pci_unregister_driver(struct pci_driver *drv) | |
1169 | { | |
0994375e | 1170 | pci_remove_removeid_file(drv); |
03d43b19 | 1171 | pci_remove_newid_file(drv); |
1da177e4 LT |
1172 | driver_unregister(&drv->driver); |
1173 | pci_free_dynids(drv); | |
1174 | } | |
1175 | ||
1176 | static struct pci_driver pci_compat_driver = { | |
1177 | .name = "compat" | |
1178 | }; | |
1179 | ||
1180 | /** | |
1181 | * pci_dev_driver - get the pci_driver of a device | |
1182 | * @dev: the device to query | |
1183 | * | |
1184 | * Returns the appropriate pci_driver structure or %NULL if there is no | |
1185 | * registered driver for the device. | |
1186 | */ | |
1187 | struct pci_driver * | |
1188 | pci_dev_driver(const struct pci_dev *dev) | |
1189 | { | |
1190 | if (dev->driver) | |
1191 | return dev->driver; | |
1192 | else { | |
1193 | int i; | |
1194 | for(i=0; i<=PCI_ROM_RESOURCE; i++) | |
1195 | if (dev->resource[i].flags & IORESOURCE_BUSY) | |
1196 | return &pci_compat_driver; | |
1197 | } | |
1198 | return NULL; | |
1199 | } | |
1200 | ||
1201 | /** | |
1202 | * pci_bus_match - Tell if a PCI device structure has a matching PCI device id structure | |
1da177e4 | 1203 | * @dev: the PCI device structure to match against |
8f7020d3 | 1204 | * @drv: the device driver to search for matching PCI device id structures |
1da177e4 LT |
1205 | * |
1206 | * Used by a driver to check whether a PCI device present in the | |
8f7020d3 | 1207 | * system is in its list of supported devices. Returns the matching |
1da177e4 LT |
1208 | * pci_device_id structure or %NULL if there is no match. |
1209 | */ | |
75865858 | 1210 | static int pci_bus_match(struct device *dev, struct device_driver *drv) |
1da177e4 | 1211 | { |
75865858 GKH |
1212 | struct pci_dev *pci_dev = to_pci_dev(dev); |
1213 | struct pci_driver *pci_drv = to_pci_driver(drv); | |
1da177e4 LT |
1214 | const struct pci_device_id *found_id; |
1215 | ||
75865858 | 1216 | found_id = pci_match_device(pci_drv, pci_dev); |
1da177e4 LT |
1217 | if (found_id) |
1218 | return 1; | |
1219 | ||
75865858 | 1220 | return 0; |
1da177e4 LT |
1221 | } |
1222 | ||
1223 | /** | |
1224 | * pci_dev_get - increments the reference count of the pci device structure | |
1225 | * @dev: the device being referenced | |
1226 | * | |
1227 | * Each live reference to a device should be refcounted. | |
1228 | * | |
1229 | * Drivers for PCI devices should normally record such references in | |
1230 | * their probe() methods, when they bind to a device, and release | |
1231 | * them by calling pci_dev_put(), in their disconnect() methods. | |
1232 | * | |
1233 | * A pointer to the device with the incremented reference counter is returned. | |
1234 | */ | |
1235 | struct pci_dev *pci_dev_get(struct pci_dev *dev) | |
1236 | { | |
1237 | if (dev) | |
1238 | get_device(&dev->dev); | |
1239 | return dev; | |
1240 | } | |
1241 | ||
1242 | /** | |
1243 | * pci_dev_put - release a use of the pci device structure | |
1244 | * @dev: device that's been disconnected | |
1245 | * | |
1246 | * Must be called when a user of a device is finished with it. When the last | |
1247 | * user of the device calls this function, the memory of the device is freed. | |
1248 | */ | |
1249 | void pci_dev_put(struct pci_dev *dev) | |
1250 | { | |
1251 | if (dev) | |
1252 | put_device(&dev->dev); | |
1253 | } | |
1254 | ||
1255 | #ifndef CONFIG_HOTPLUG | |
7eff2e7a | 1256 | int pci_uevent(struct device *dev, struct kobj_uevent_env *env) |
1da177e4 LT |
1257 | { |
1258 | return -ENODEV; | |
1259 | } | |
1260 | #endif | |
1261 | ||
1262 | struct bus_type pci_bus_type = { | |
1263 | .name = "pci", | |
1264 | .match = pci_bus_match, | |
312c004d | 1265 | .uevent = pci_uevent, |
b15d686a RK |
1266 | .probe = pci_device_probe, |
1267 | .remove = pci_device_remove, | |
cbd69dbb | 1268 | .shutdown = pci_device_shutdown, |
1da177e4 | 1269 | .dev_attrs = pci_dev_attrs, |
705b1aaa | 1270 | .bus_attrs = pci_bus_attrs, |
bbb44d9f | 1271 | .pm = PCI_PM_OPS_PTR, |
1da177e4 LT |
1272 | }; |
1273 | ||
1274 | static int __init pci_driver_init(void) | |
1275 | { | |
1276 | return bus_register(&pci_bus_type); | |
1277 | } | |
1278 | ||
1279 | postcore_initcall(pci_driver_init); | |
1280 | ||
9dba910e | 1281 | EXPORT_SYMBOL_GPL(pci_add_dynid); |
75865858 | 1282 | EXPORT_SYMBOL(pci_match_id); |
863b18f4 | 1283 | EXPORT_SYMBOL(__pci_register_driver); |
1da177e4 LT |
1284 | EXPORT_SYMBOL(pci_unregister_driver); |
1285 | EXPORT_SYMBOL(pci_dev_driver); | |
1286 | EXPORT_SYMBOL(pci_bus_type); | |
1287 | EXPORT_SYMBOL(pci_dev_get); | |
1288 | EXPORT_SYMBOL(pci_dev_put); |