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> |
1da177e4 LT |
21 | #include "pci.h" |
22 | ||
75865858 GKH |
23 | struct pci_dynid { |
24 | struct list_head node; | |
25 | struct pci_device_id id; | |
26 | }; | |
1da177e4 | 27 | |
9dba910e TH |
28 | /** |
29 | * pci_add_dynid - add a new PCI device ID to this driver and re-probe devices | |
30 | * @drv: target pci driver | |
31 | * @vendor: PCI vendor ID | |
32 | * @device: PCI device ID | |
33 | * @subvendor: PCI subvendor ID | |
34 | * @subdevice: PCI subdevice ID | |
35 | * @class: PCI class | |
36 | * @class_mask: PCI class mask | |
37 | * @driver_data: private driver data | |
38 | * | |
39 | * Adds a new dynamic pci device ID to this driver and causes the | |
40 | * driver to probe for all devices again. @drv must have been | |
41 | * registered prior to calling this function. | |
42 | * | |
43 | * CONTEXT: | |
44 | * Does GFP_KERNEL allocation. | |
45 | * | |
46 | * RETURNS: | |
47 | * 0 on success, -errno on failure. | |
48 | */ | |
49 | int pci_add_dynid(struct pci_driver *drv, | |
50 | unsigned int vendor, unsigned int device, | |
51 | unsigned int subvendor, unsigned int subdevice, | |
52 | unsigned int class, unsigned int class_mask, | |
53 | unsigned long driver_data) | |
54 | { | |
55 | struct pci_dynid *dynid; | |
56 | int retval; | |
57 | ||
58 | dynid = kzalloc(sizeof(*dynid), GFP_KERNEL); | |
59 | if (!dynid) | |
60 | return -ENOMEM; | |
61 | ||
62 | dynid->id.vendor = vendor; | |
63 | dynid->id.device = device; | |
64 | dynid->id.subvendor = subvendor; | |
65 | dynid->id.subdevice = subdevice; | |
66 | dynid->id.class = class; | |
67 | dynid->id.class_mask = class_mask; | |
68 | dynid->id.driver_data = driver_data; | |
3d3c2ae1 | 69 | |
9dba910e TH |
70 | spin_lock(&drv->dynids.lock); |
71 | list_add_tail(&dynid->node, &drv->dynids.list); | |
72 | spin_unlock(&drv->dynids.lock); | |
73 | ||
74 | get_driver(&drv->driver); | |
75 | retval = driver_attach(&drv->driver); | |
76 | put_driver(&drv->driver); | |
77 | ||
78 | return retval; | |
79 | } | |
80 | ||
81 | static void pci_free_dynids(struct pci_driver *drv) | |
82 | { | |
83 | struct pci_dynid *dynid, *n; | |
3d3c2ae1 | 84 | |
9dba910e TH |
85 | spin_lock(&drv->dynids.lock); |
86 | list_for_each_entry_safe(dynid, n, &drv->dynids.list, node) { | |
87 | list_del(&dynid->node); | |
88 | kfree(dynid); | |
89 | } | |
90 | spin_unlock(&drv->dynids.lock); | |
91 | } | |
92 | ||
93 | /* | |
94 | * Dynamic device ID manipulation via sysfs is disabled for !CONFIG_HOTPLUG | |
95 | */ | |
96 | #ifdef CONFIG_HOTPLUG | |
1da177e4 | 97 | /** |
9dba910e | 98 | * store_new_id - sysfs frontend to pci_add_dynid() |
8f7020d3 RD |
99 | * @driver: target device driver |
100 | * @buf: buffer for scanning device ID data | |
101 | * @count: input size | |
1da177e4 | 102 | * |
9dba910e | 103 | * Allow PCI IDs to be added to an existing driver via sysfs. |
1da177e4 | 104 | */ |
f8eb1005 | 105 | static ssize_t |
1da177e4 LT |
106 | store_new_id(struct device_driver *driver, const char *buf, size_t count) |
107 | { | |
1da177e4 | 108 | struct pci_driver *pdrv = to_pci_driver(driver); |
b41d6cf3 | 109 | const struct pci_device_id *ids = pdrv->id_table; |
6ba18636 | 110 | __u32 vendor, device, subvendor=PCI_ANY_ID, |
1da177e4 LT |
111 | subdevice=PCI_ANY_ID, class=0, class_mask=0; |
112 | unsigned long driver_data=0; | |
113 | int fields=0; | |
9dba910e | 114 | int retval; |
1da177e4 | 115 | |
b41d6cf3 | 116 | fields = sscanf(buf, "%x %x %x %x %x %x %lx", |
1da177e4 LT |
117 | &vendor, &device, &subvendor, &subdevice, |
118 | &class, &class_mask, &driver_data); | |
6ba18636 | 119 | if (fields < 2) |
1da177e4 LT |
120 | return -EINVAL; |
121 | ||
b41d6cf3 JD |
122 | /* Only accept driver_data values that match an existing id_table |
123 | entry */ | |
2debb4d2 CW |
124 | if (ids) { |
125 | retval = -EINVAL; | |
126 | while (ids->vendor || ids->subvendor || ids->class_mask) { | |
127 | if (driver_data == ids->driver_data) { | |
128 | retval = 0; | |
129 | break; | |
130 | } | |
131 | ids++; | |
b41d6cf3 | 132 | } |
2debb4d2 CW |
133 | if (retval) /* No match */ |
134 | return retval; | |
b41d6cf3 | 135 | } |
b41d6cf3 | 136 | |
9dba910e TH |
137 | retval = pci_add_dynid(pdrv, vendor, device, subvendor, subdevice, |
138 | class, class_mask, driver_data); | |
b19441af GKH |
139 | if (retval) |
140 | return retval; | |
1da177e4 LT |
141 | return count; |
142 | } | |
1da177e4 | 143 | static DRIVER_ATTR(new_id, S_IWUSR, NULL, store_new_id); |
1da177e4 | 144 | |
0994375e CW |
145 | /** |
146 | * store_remove_id - remove a PCI device ID from this driver | |
147 | * @driver: target device driver | |
148 | * @buf: buffer for scanning device ID data | |
149 | * @count: input size | |
150 | * | |
151 | * Removes a dynamic pci device ID to this driver. | |
152 | */ | |
153 | static ssize_t | |
154 | store_remove_id(struct device_driver *driver, const char *buf, size_t count) | |
155 | { | |
156 | struct pci_dynid *dynid, *n; | |
157 | struct pci_driver *pdrv = to_pci_driver(driver); | |
158 | __u32 vendor, device, subvendor = PCI_ANY_ID, | |
159 | subdevice = PCI_ANY_ID, class = 0, class_mask = 0; | |
160 | int fields = 0; | |
161 | int retval = -ENODEV; | |
162 | ||
163 | fields = sscanf(buf, "%x %x %x %x %x %x", | |
164 | &vendor, &device, &subvendor, &subdevice, | |
165 | &class, &class_mask); | |
166 | if (fields < 2) | |
167 | return -EINVAL; | |
168 | ||
169 | spin_lock(&pdrv->dynids.lock); | |
170 | list_for_each_entry_safe(dynid, n, &pdrv->dynids.list, node) { | |
171 | struct pci_device_id *id = &dynid->id; | |
172 | if ((id->vendor == vendor) && | |
173 | (id->device == device) && | |
174 | (subvendor == PCI_ANY_ID || id->subvendor == subvendor) && | |
175 | (subdevice == PCI_ANY_ID || id->subdevice == subdevice) && | |
176 | !((id->class ^ class) & class_mask)) { | |
177 | list_del(&dynid->node); | |
178 | kfree(dynid); | |
179 | retval = 0; | |
180 | break; | |
181 | } | |
182 | } | |
183 | spin_unlock(&pdrv->dynids.lock); | |
184 | ||
185 | if (retval) | |
186 | return retval; | |
187 | return count; | |
188 | } | |
189 | static DRIVER_ATTR(remove_id, S_IWUSR, NULL, store_remove_id); | |
190 | ||
1da177e4 LT |
191 | static int |
192 | pci_create_newid_file(struct pci_driver *drv) | |
193 | { | |
194 | int error = 0; | |
195 | if (drv->probe != NULL) | |
03d43b19 | 196 | error = driver_create_file(&drv->driver, &driver_attr_new_id); |
1da177e4 LT |
197 | return error; |
198 | } | |
199 | ||
03d43b19 GKH |
200 | static void pci_remove_newid_file(struct pci_driver *drv) |
201 | { | |
202 | driver_remove_file(&drv->driver, &driver_attr_new_id); | |
203 | } | |
0994375e CW |
204 | |
205 | static int | |
206 | pci_create_removeid_file(struct pci_driver *drv) | |
207 | { | |
208 | int error = 0; | |
209 | if (drv->probe != NULL) | |
210 | error = driver_create_file(&drv->driver,&driver_attr_remove_id); | |
211 | return error; | |
212 | } | |
213 | ||
214 | static void pci_remove_removeid_file(struct pci_driver *drv) | |
215 | { | |
216 | driver_remove_file(&drv->driver, &driver_attr_remove_id); | |
217 | } | |
1da177e4 | 218 | #else /* !CONFIG_HOTPLUG */ |
1da177e4 LT |
219 | static inline int pci_create_newid_file(struct pci_driver *drv) |
220 | { | |
221 | return 0; | |
222 | } | |
03d43b19 | 223 | static inline void pci_remove_newid_file(struct pci_driver *drv) {} |
0994375e CW |
224 | static inline int pci_create_removeid_file(struct pci_driver *drv) |
225 | { | |
226 | return 0; | |
227 | } | |
228 | static inline void pci_remove_removeid_file(struct pci_driver *drv) {} | |
1da177e4 LT |
229 | #endif |
230 | ||
231 | /** | |
75865858 | 232 | * pci_match_id - See if a pci device matches a given pci_id table |
1da177e4 | 233 | * @ids: array of PCI device id structures to search in |
75865858 GKH |
234 | * @dev: the PCI device structure to match against. |
235 | * | |
1da177e4 | 236 | * Used by a driver to check whether a PCI device present in the |
75865858 | 237 | * system is in its list of supported devices. Returns the matching |
1da177e4 | 238 | * pci_device_id structure or %NULL if there is no match. |
75865858 | 239 | * |
8b60756a | 240 | * Deprecated, don't use this as it will not catch any dynamic ids |
75865858 | 241 | * that a driver might want to check for. |
1da177e4 | 242 | */ |
75865858 GKH |
243 | const struct pci_device_id *pci_match_id(const struct pci_device_id *ids, |
244 | struct pci_dev *dev) | |
1da177e4 | 245 | { |
75865858 GKH |
246 | if (ids) { |
247 | while (ids->vendor || ids->subvendor || ids->class_mask) { | |
248 | if (pci_match_one_device(ids, dev)) | |
249 | return ids; | |
250 | ids++; | |
251 | } | |
1da177e4 LT |
252 | } |
253 | return NULL; | |
254 | } | |
255 | ||
256 | /** | |
ae9608af | 257 | * pci_match_device - Tell if a PCI device structure has a matching PCI device id structure |
75865858 | 258 | * @drv: the PCI driver to match against |
39ba487f | 259 | * @dev: the PCI device structure to match against |
75865858 GKH |
260 | * |
261 | * Used by a driver to check whether a PCI device present in the | |
262 | * system is in its list of supported devices. Returns the matching | |
263 | * pci_device_id structure or %NULL if there is no match. | |
1da177e4 | 264 | */ |
d73460d7 AB |
265 | static const struct pci_device_id *pci_match_device(struct pci_driver *drv, |
266 | struct pci_dev *dev) | |
75865858 | 267 | { |
75865858 | 268 | struct pci_dynid *dynid; |
1da177e4 | 269 | |
7461b60a | 270 | /* Look at the dynamic ids first, before the static ones */ |
75865858 GKH |
271 | spin_lock(&drv->dynids.lock); |
272 | list_for_each_entry(dynid, &drv->dynids.list, node) { | |
273 | if (pci_match_one_device(&dynid->id, dev)) { | |
274 | spin_unlock(&drv->dynids.lock); | |
275 | return &dynid->id; | |
276 | } | |
1da177e4 | 277 | } |
75865858 | 278 | spin_unlock(&drv->dynids.lock); |
7461b60a RK |
279 | |
280 | return pci_match_id(drv->id_table, dev); | |
1da177e4 LT |
281 | } |
282 | ||
873392ca RR |
283 | struct drv_dev_and_id { |
284 | struct pci_driver *drv; | |
285 | struct pci_dev *dev; | |
286 | const struct pci_device_id *id; | |
287 | }; | |
288 | ||
289 | static long local_pci_probe(void *_ddi) | |
290 | { | |
291 | struct drv_dev_and_id *ddi = _ddi; | |
f3ec4f87 AS |
292 | struct device *dev = &ddi->dev->dev; |
293 | int rc; | |
294 | ||
295 | /* Unbound PCI devices are always set to disabled and suspended. | |
296 | * During probe, the device is set to enabled and active and the | |
297 | * usage count is incremented. If the driver supports runtime PM, | |
298 | * it should call pm_runtime_put_noidle() in its probe routine and | |
299 | * pm_runtime_get_noresume() in its remove routine. | |
300 | */ | |
301 | pm_runtime_get_noresume(dev); | |
302 | pm_runtime_set_active(dev); | |
303 | pm_runtime_enable(dev); | |
304 | ||
305 | rc = ddi->drv->probe(ddi->dev, ddi->id); | |
306 | if (rc) { | |
307 | pm_runtime_disable(dev); | |
308 | pm_runtime_set_suspended(dev); | |
309 | pm_runtime_put_noidle(dev); | |
310 | } | |
311 | return rc; | |
873392ca RR |
312 | } |
313 | ||
d42c6997 AK |
314 | static int pci_call_probe(struct pci_driver *drv, struct pci_dev *dev, |
315 | const struct pci_device_id *id) | |
316 | { | |
873392ca RR |
317 | int error, node; |
318 | struct drv_dev_and_id ddi = { drv, dev, id }; | |
319 | ||
320 | /* Execute driver initialization on node where the device's | |
321 | bus is attached to. This way the driver likely allocates | |
322 | its local memory on the right node without any need to | |
323 | change it. */ | |
324 | node = dev_to_node(&dev->dev); | |
f70316da | 325 | if (node >= 0) { |
873392ca | 326 | int cpu; |
873392ca RR |
327 | |
328 | get_online_cpus(); | |
a70f7302 | 329 | cpu = cpumask_any_and(cpumask_of_node(node), cpu_online_mask); |
873392ca RR |
330 | if (cpu < nr_cpu_ids) |
331 | error = work_on_cpu(cpu, local_pci_probe, &ddi); | |
332 | else | |
333 | error = local_pci_probe(&ddi); | |
334 | put_online_cpus(); | |
335 | } else | |
336 | error = local_pci_probe(&ddi); | |
d42c6997 AK |
337 | return error; |
338 | } | |
339 | ||
1da177e4 | 340 | /** |
23ea3793 | 341 | * __pci_device_probe - check if a driver wants to claim a specific PCI device |
8f7020d3 RD |
342 | * @drv: driver to call to check if it wants the PCI device |
343 | * @pci_dev: PCI device being probed | |
1da177e4 | 344 | * |
8f7020d3 | 345 | * returns 0 on success, else error. |
1da177e4 LT |
346 | * side-effect: pci_dev->driver is set to drv when drv claims pci_dev. |
347 | */ | |
348 | static int | |
349 | __pci_device_probe(struct pci_driver *drv, struct pci_dev *pci_dev) | |
75865858 GKH |
350 | { |
351 | const struct pci_device_id *id; | |
1da177e4 LT |
352 | int error = 0; |
353 | ||
354 | if (!pci_dev->driver && drv->probe) { | |
75865858 GKH |
355 | error = -ENODEV; |
356 | ||
357 | id = pci_match_device(drv, pci_dev); | |
358 | if (id) | |
d42c6997 | 359 | error = pci_call_probe(drv, pci_dev, id); |
75865858 GKH |
360 | if (error >= 0) { |
361 | pci_dev->driver = drv; | |
362 | error = 0; | |
363 | } | |
1da177e4 LT |
364 | } |
365 | return error; | |
366 | } | |
367 | ||
368 | static int pci_device_probe(struct device * dev) | |
369 | { | |
370 | int error = 0; | |
371 | struct pci_driver *drv; | |
372 | struct pci_dev *pci_dev; | |
373 | ||
374 | drv = to_pci_driver(dev->driver); | |
375 | pci_dev = to_pci_dev(dev); | |
376 | pci_dev_get(pci_dev); | |
377 | error = __pci_device_probe(drv, pci_dev); | |
378 | if (error) | |
379 | pci_dev_put(pci_dev); | |
380 | ||
381 | return error; | |
382 | } | |
383 | ||
384 | static int pci_device_remove(struct device * dev) | |
385 | { | |
386 | struct pci_dev * pci_dev = to_pci_dev(dev); | |
387 | struct pci_driver * drv = pci_dev->driver; | |
388 | ||
389 | if (drv) { | |
f3ec4f87 AS |
390 | if (drv->remove) { |
391 | pm_runtime_get_sync(dev); | |
1da177e4 | 392 | drv->remove(pci_dev); |
f3ec4f87 AS |
393 | pm_runtime_put_noidle(dev); |
394 | } | |
1da177e4 LT |
395 | pci_dev->driver = NULL; |
396 | } | |
397 | ||
f3ec4f87 AS |
398 | /* Undo the runtime PM settings in local_pci_probe() */ |
399 | pm_runtime_disable(dev); | |
400 | pm_runtime_set_suspended(dev); | |
401 | pm_runtime_put_noidle(dev); | |
402 | ||
2449e06a SL |
403 | /* |
404 | * If the device is still on, set the power state as "unknown", | |
405 | * since it might change by the next time we load the driver. | |
406 | */ | |
407 | if (pci_dev->current_state == PCI_D0) | |
408 | pci_dev->current_state = PCI_UNKNOWN; | |
409 | ||
1da177e4 LT |
410 | /* |
411 | * We would love to complain here if pci_dev->is_enabled is set, that | |
412 | * the driver should have called pci_disable_device(), but the | |
413 | * unfortunate fact is there are too many odd BIOS and bridge setups | |
414 | * that don't like drivers doing that all of the time. | |
415 | * Oh well, we can dream of sane hardware when we sleep, no matter how | |
416 | * horrible the crap we have to deal with is when we are awake... | |
417 | */ | |
418 | ||
419 | pci_dev_put(pci_dev); | |
420 | return 0; | |
421 | } | |
422 | ||
bbb44d9f RW |
423 | static void pci_device_shutdown(struct device *dev) |
424 | { | |
425 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
426 | struct pci_driver *drv = pci_dev->driver; | |
427 | ||
428 | if (drv && drv->shutdown) | |
429 | drv->shutdown(pci_dev); | |
430 | pci_msi_shutdown(pci_dev); | |
431 | pci_msix_shutdown(pci_dev); | |
432 | } | |
433 | ||
6cbf8214 RW |
434 | #ifdef CONFIG_PM_OPS |
435 | ||
436 | /* Auxiliary functions used for system resume and run-time resume. */ | |
437 | ||
438 | /** | |
439 | * pci_restore_standard_config - restore standard config registers of PCI device | |
440 | * @pci_dev: PCI device to handle | |
441 | */ | |
442 | static int pci_restore_standard_config(struct pci_dev *pci_dev) | |
443 | { | |
444 | pci_update_current_state(pci_dev, PCI_UNKNOWN); | |
445 | ||
446 | if (pci_dev->current_state != PCI_D0) { | |
447 | int error = pci_set_power_state(pci_dev, PCI_D0); | |
448 | if (error) | |
449 | return error; | |
450 | } | |
451 | ||
1d3c16a8 JM |
452 | pci_restore_state(pci_dev); |
453 | return 0; | |
6cbf8214 RW |
454 | } |
455 | ||
456 | static void pci_pm_default_resume_early(struct pci_dev *pci_dev) | |
457 | { | |
458 | pci_restore_standard_config(pci_dev); | |
459 | pci_fixup_device(pci_fixup_resume_early, pci_dev); | |
460 | } | |
461 | ||
462 | #endif | |
463 | ||
bbb44d9f RW |
464 | #ifdef CONFIG_PM_SLEEP |
465 | ||
fa58d305 RW |
466 | /* |
467 | * Default "suspend" method for devices that have no driver provided suspend, | |
468 | * or not even a driver at all (second part). | |
bbb44d9f | 469 | */ |
bb808945 | 470 | static void pci_pm_set_unknown_state(struct pci_dev *pci_dev) |
bbb44d9f | 471 | { |
bbb44d9f RW |
472 | /* |
473 | * mark its power state as "unknown", since we don't know if | |
474 | * e.g. the BIOS will change its device state when we suspend. | |
475 | */ | |
476 | if (pci_dev->current_state == PCI_D0) | |
477 | pci_dev->current_state = PCI_UNKNOWN; | |
478 | } | |
479 | ||
355a72d7 RW |
480 | /* |
481 | * Default "resume" method for devices that have no driver provided resume, | |
482 | * or not even a driver at all (second part). | |
483 | */ | |
bb808945 | 484 | static int pci_pm_reenable_device(struct pci_dev *pci_dev) |
355a72d7 RW |
485 | { |
486 | int retval; | |
487 | ||
bbb44d9f RW |
488 | /* if the device was enabled before suspend, reenable */ |
489 | retval = pci_reenable_device(pci_dev); | |
490 | /* | |
491 | * if the device was busmaster before the suspend, make it busmaster | |
492 | * again | |
493 | */ | |
494 | if (pci_dev->is_busmaster) | |
495 | pci_set_master(pci_dev); | |
496 | ||
497 | return retval; | |
498 | } | |
499 | ||
500 | static int pci_legacy_suspend(struct device *dev, pm_message_t state) | |
1da177e4 LT |
501 | { |
502 | struct pci_dev * pci_dev = to_pci_dev(dev); | |
503 | struct pci_driver * drv = pci_dev->driver; | |
46939f8b | 504 | |
02669492 | 505 | if (drv && drv->suspend) { |
99dadce8 | 506 | pci_power_t prev = pci_dev->current_state; |
46939f8b | 507 | int error; |
aa8c6c93 | 508 | |
57ef8026 FP |
509 | error = drv->suspend(pci_dev, state); |
510 | suspend_report_result(drv->suspend, error); | |
511 | if (error) | |
512 | return error; | |
aa8c6c93 | 513 | |
46939f8b | 514 | if (!pci_dev->state_saved && pci_dev->current_state != PCI_D0 |
99dadce8 RW |
515 | && pci_dev->current_state != PCI_UNKNOWN) { |
516 | WARN_ONCE(pci_dev->current_state != prev, | |
517 | "PCI PM: Device state not saved by %pF\n", | |
518 | drv->suspend); | |
99dadce8 | 519 | } |
02669492 | 520 | } |
ad8cfa1d RW |
521 | |
522 | pci_fixup_device(pci_fixup_suspend, pci_dev); | |
523 | ||
46939f8b | 524 | return 0; |
1da177e4 LT |
525 | } |
526 | ||
bbb44d9f | 527 | static int pci_legacy_suspend_late(struct device *dev, pm_message_t state) |
cbd69dbb LT |
528 | { |
529 | struct pci_dev * pci_dev = to_pci_dev(dev); | |
530 | struct pci_driver * drv = pci_dev->driver; | |
cbd69dbb LT |
531 | |
532 | if (drv && drv->suspend_late) { | |
46939f8b RW |
533 | pci_power_t prev = pci_dev->current_state; |
534 | int error; | |
535 | ||
57ef8026 FP |
536 | error = drv->suspend_late(pci_dev, state); |
537 | suspend_report_result(drv->suspend_late, error); | |
46939f8b RW |
538 | if (error) |
539 | return error; | |
540 | ||
541 | if (!pci_dev->state_saved && pci_dev->current_state != PCI_D0 | |
542 | && pci_dev->current_state != PCI_UNKNOWN) { | |
543 | WARN_ONCE(pci_dev->current_state != prev, | |
544 | "PCI PM: Device state not saved by %pF\n", | |
545 | drv->suspend_late); | |
546 | return 0; | |
547 | } | |
cbd69dbb | 548 | } |
46939f8b RW |
549 | |
550 | if (!pci_dev->state_saved) | |
551 | pci_save_state(pci_dev); | |
552 | ||
553 | pci_pm_set_unknown_state(pci_dev); | |
554 | ||
555 | return 0; | |
cbd69dbb | 556 | } |
1da177e4 | 557 | |
f6dc1e5e RW |
558 | static int pci_legacy_resume_early(struct device *dev) |
559 | { | |
f6dc1e5e RW |
560 | struct pci_dev * pci_dev = to_pci_dev(dev); |
561 | struct pci_driver * drv = pci_dev->driver; | |
562 | ||
aa8c6c93 RW |
563 | return drv && drv->resume_early ? |
564 | drv->resume_early(pci_dev) : 0; | |
f6dc1e5e RW |
565 | } |
566 | ||
bbb44d9f | 567 | static int pci_legacy_resume(struct device *dev) |
1da177e4 LT |
568 | { |
569 | struct pci_dev * pci_dev = to_pci_dev(dev); | |
570 | struct pci_driver * drv = pci_dev->driver; | |
571 | ||
ad8cfa1d RW |
572 | pci_fixup_device(pci_fixup_resume, pci_dev); |
573 | ||
aa8c6c93 RW |
574 | return drv && drv->resume ? |
575 | drv->resume(pci_dev) : pci_pm_reenable_device(pci_dev); | |
1da177e4 LT |
576 | } |
577 | ||
571ff758 RW |
578 | /* Auxiliary functions used by the new power management framework */ |
579 | ||
5294e256 | 580 | static void pci_pm_default_resume(struct pci_dev *pci_dev) |
571ff758 | 581 | { |
73410429 RW |
582 | pci_fixup_device(pci_fixup_resume, pci_dev); |
583 | ||
5294e256 RW |
584 | if (!pci_is_bridge(pci_dev)) |
585 | pci_enable_wake(pci_dev, PCI_D0, false); | |
571ff758 RW |
586 | } |
587 | ||
5294e256 | 588 | static void pci_pm_default_suspend(struct pci_dev *pci_dev) |
73410429 | 589 | { |
5294e256 | 590 | /* Disable non-bridge devices without PM support */ |
cbbc2f6b RW |
591 | if (!pci_is_bridge(pci_dev)) |
592 | pci_disable_enabled_device(pci_dev); | |
73410429 RW |
593 | } |
594 | ||
07e836e8 RW |
595 | static bool pci_has_legacy_pm_support(struct pci_dev *pci_dev) |
596 | { | |
597 | struct pci_driver *drv = pci_dev->driver; | |
bb808945 | 598 | bool ret = drv && (drv->suspend || drv->suspend_late || drv->resume |
07e836e8 | 599 | || drv->resume_early); |
bb808945 RW |
600 | |
601 | /* | |
602 | * Legacy PM support is used by default, so warn if the new framework is | |
603 | * supported as well. Drivers are supposed to support either the | |
604 | * former, or the latter, but not both at the same time. | |
605 | */ | |
606 | WARN_ON(ret && drv->driver.pm); | |
607 | ||
608 | return ret; | |
07e836e8 RW |
609 | } |
610 | ||
571ff758 RW |
611 | /* New power management framework */ |
612 | ||
bbb44d9f RW |
613 | static int pci_pm_prepare(struct device *dev) |
614 | { | |
615 | struct device_driver *drv = dev->driver; | |
616 | int error = 0; | |
617 | ||
6cbf8214 RW |
618 | /* |
619 | * PCI devices suspended at run time need to be resumed at this | |
620 | * point, because in general it is necessary to reconfigure them for | |
621 | * system suspend. Namely, if the device is supposed to wake up the | |
622 | * system from the sleep state, we may need to reconfigure it for this | |
623 | * purpose. In turn, if the device is not supposed to wake up the | |
624 | * system from the sleep state, we'll have to prevent it from signaling | |
625 | * wake-up. | |
626 | */ | |
627 | pm_runtime_resume(dev); | |
628 | ||
bbb44d9f RW |
629 | if (drv && drv->pm && drv->pm->prepare) |
630 | error = drv->pm->prepare(dev); | |
631 | ||
632 | return error; | |
633 | } | |
634 | ||
635 | static void pci_pm_complete(struct device *dev) | |
636 | { | |
637 | struct device_driver *drv = dev->driver; | |
638 | ||
639 | if (drv && drv->pm && drv->pm->complete) | |
640 | drv->pm->complete(dev); | |
641 | } | |
642 | ||
6cbf8214 RW |
643 | #else /* !CONFIG_PM_SLEEP */ |
644 | ||
645 | #define pci_pm_prepare NULL | |
646 | #define pci_pm_complete NULL | |
647 | ||
648 | #endif /* !CONFIG_PM_SLEEP */ | |
649 | ||
bbb44d9f RW |
650 | #ifdef CONFIG_SUSPEND |
651 | ||
652 | static int pci_pm_suspend(struct device *dev) | |
653 | { | |
654 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
8150f32b | 655 | const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; |
bbb44d9f | 656 | |
ad8cfa1d RW |
657 | if (pci_has_legacy_pm_support(pci_dev)) |
658 | return pci_legacy_suspend(dev, PMSG_SUSPEND); | |
bb808945 | 659 | |
5294e256 RW |
660 | if (!pm) { |
661 | pci_pm_default_suspend(pci_dev); | |
662 | goto Fixup; | |
663 | } | |
664 | ||
5294e256 RW |
665 | if (pm->suspend) { |
666 | pci_power_t prev = pci_dev->current_state; | |
667 | int error; | |
668 | ||
ddb7c9d2 RW |
669 | error = pm->suspend(dev); |
670 | suspend_report_result(pm->suspend, error); | |
5294e256 RW |
671 | if (error) |
672 | return error; | |
673 | ||
46939f8b | 674 | if (!pci_dev->state_saved && pci_dev->current_state != PCI_D0 |
5294e256 RW |
675 | && pci_dev->current_state != PCI_UNKNOWN) { |
676 | WARN_ONCE(pci_dev->current_state != prev, | |
677 | "PCI PM: State of device not saved by %pF\n", | |
678 | pm->suspend); | |
5294e256 | 679 | } |
bbb44d9f | 680 | } |
fa58d305 | 681 | |
5294e256 RW |
682 | Fixup: |
683 | pci_fixup_device(pci_fixup_suspend, pci_dev); | |
684 | ||
685 | return 0; | |
bbb44d9f RW |
686 | } |
687 | ||
688 | static int pci_pm_suspend_noirq(struct device *dev) | |
c8958177 | 689 | { |
355a72d7 | 690 | struct pci_dev *pci_dev = to_pci_dev(dev); |
8150f32b | 691 | const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; |
c8958177 | 692 | |
bb808945 RW |
693 | if (pci_has_legacy_pm_support(pci_dev)) |
694 | return pci_legacy_suspend_late(dev, PMSG_SUSPEND); | |
695 | ||
931ff68a RW |
696 | if (!pm) { |
697 | pci_save_state(pci_dev); | |
46939f8b | 698 | return 0; |
931ff68a | 699 | } |
46939f8b RW |
700 | |
701 | if (pm->suspend_noirq) { | |
702 | pci_power_t prev = pci_dev->current_state; | |
703 | int error; | |
704 | ||
705 | error = pm->suspend_noirq(dev); | |
706 | suspend_report_result(pm->suspend_noirq, error); | |
707 | if (error) | |
708 | return error; | |
709 | ||
710 | if (!pci_dev->state_saved && pci_dev->current_state != PCI_D0 | |
711 | && pci_dev->current_state != PCI_UNKNOWN) { | |
712 | WARN_ONCE(pci_dev->current_state != prev, | |
713 | "PCI PM: State of device not saved by %pF\n", | |
714 | pm->suspend_noirq); | |
715 | return 0; | |
716 | } | |
bbb44d9f RW |
717 | } |
718 | ||
46939f8b RW |
719 | if (!pci_dev->state_saved) { |
720 | pci_save_state(pci_dev); | |
721 | if (!pci_is_bridge(pci_dev)) | |
722 | pci_prepare_to_sleep(pci_dev); | |
723 | } | |
d67e37d7 | 724 | |
46939f8b RW |
725 | pci_pm_set_unknown_state(pci_dev); |
726 | ||
727 | return 0; | |
c8958177 | 728 | } |
1da177e4 | 729 | |
f6dc1e5e | 730 | static int pci_pm_resume_noirq(struct device *dev) |
bbb44d9f RW |
731 | { |
732 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
733 | struct device_driver *drv = dev->driver; | |
355a72d7 | 734 | int error = 0; |
bbb44d9f | 735 | |
6cbf8214 | 736 | pci_pm_default_resume_early(pci_dev); |
aa8c6c93 | 737 | |
ad8cfa1d | 738 | if (pci_has_legacy_pm_support(pci_dev)) |
f6dc1e5e | 739 | return pci_legacy_resume_early(dev); |
bb808945 | 740 | |
f6dc1e5e RW |
741 | if (drv && drv->pm && drv->pm->resume_noirq) |
742 | error = drv->pm->resume_noirq(dev); | |
bbb44d9f RW |
743 | |
744 | return error; | |
745 | } | |
746 | ||
f6dc1e5e | 747 | static int pci_pm_resume(struct device *dev) |
bbb44d9f | 748 | { |
355a72d7 | 749 | struct pci_dev *pci_dev = to_pci_dev(dev); |
8150f32b | 750 | const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; |
bbb44d9f RW |
751 | int error = 0; |
752 | ||
418e4da3 RW |
753 | /* |
754 | * This is necessary for the suspend error path in which resume is | |
755 | * called without restoring the standard config registers of the device. | |
756 | */ | |
757 | if (pci_dev->state_saved) | |
758 | pci_restore_standard_config(pci_dev); | |
759 | ||
ad8cfa1d | 760 | if (pci_has_legacy_pm_support(pci_dev)) |
f6dc1e5e | 761 | return pci_legacy_resume(dev); |
bb808945 | 762 | |
5294e256 | 763 | pci_pm_default_resume(pci_dev); |
73410429 | 764 | |
5294e256 RW |
765 | if (pm) { |
766 | if (pm->resume) | |
767 | error = pm->resume(dev); | |
768 | } else { | |
769 | pci_pm_reenable_device(pci_dev); | |
770 | } | |
bbb44d9f | 771 | |
999cce4a | 772 | return error; |
bbb44d9f RW |
773 | } |
774 | ||
775 | #else /* !CONFIG_SUSPEND */ | |
776 | ||
777 | #define pci_pm_suspend NULL | |
778 | #define pci_pm_suspend_noirq NULL | |
779 | #define pci_pm_resume NULL | |
780 | #define pci_pm_resume_noirq NULL | |
781 | ||
782 | #endif /* !CONFIG_SUSPEND */ | |
783 | ||
784 | #ifdef CONFIG_HIBERNATION | |
785 | ||
786 | static int pci_pm_freeze(struct device *dev) | |
787 | { | |
788 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
8150f32b | 789 | const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; |
bbb44d9f | 790 | |
ad8cfa1d RW |
791 | if (pci_has_legacy_pm_support(pci_dev)) |
792 | return pci_legacy_suspend(dev, PMSG_FREEZE); | |
bb808945 | 793 | |
5294e256 RW |
794 | if (!pm) { |
795 | pci_pm_default_suspend(pci_dev); | |
796 | return 0; | |
bbb44d9f RW |
797 | } |
798 | ||
5294e256 RW |
799 | if (pm->freeze) { |
800 | int error; | |
801 | ||
802 | error = pm->freeze(dev); | |
803 | suspend_report_result(pm->freeze, error); | |
804 | if (error) | |
805 | return error; | |
806 | } | |
807 | ||
5294e256 | 808 | return 0; |
bbb44d9f RW |
809 | } |
810 | ||
811 | static int pci_pm_freeze_noirq(struct device *dev) | |
812 | { | |
355a72d7 | 813 | struct pci_dev *pci_dev = to_pci_dev(dev); |
adf09493 | 814 | struct device_driver *drv = dev->driver; |
bbb44d9f | 815 | |
bb808945 RW |
816 | if (pci_has_legacy_pm_support(pci_dev)) |
817 | return pci_legacy_suspend_late(dev, PMSG_FREEZE); | |
818 | ||
d67e37d7 | 819 | if (drv && drv->pm && drv->pm->freeze_noirq) { |
46939f8b RW |
820 | int error; |
821 | ||
d67e37d7 RW |
822 | error = drv->pm->freeze_noirq(dev); |
823 | suspend_report_result(drv->pm->freeze_noirq, error); | |
46939f8b RW |
824 | if (error) |
825 | return error; | |
bbb44d9f RW |
826 | } |
827 | ||
46939f8b RW |
828 | if (!pci_dev->state_saved) |
829 | pci_save_state(pci_dev); | |
d67e37d7 | 830 | |
46939f8b RW |
831 | pci_pm_set_unknown_state(pci_dev); |
832 | ||
833 | return 0; | |
bbb44d9f RW |
834 | } |
835 | ||
f6dc1e5e | 836 | static int pci_pm_thaw_noirq(struct device *dev) |
bbb44d9f | 837 | { |
355a72d7 | 838 | struct pci_dev *pci_dev = to_pci_dev(dev); |
bbb44d9f RW |
839 | struct device_driver *drv = dev->driver; |
840 | int error = 0; | |
841 | ||
ad8cfa1d | 842 | if (pci_has_legacy_pm_support(pci_dev)) |
f6dc1e5e | 843 | return pci_legacy_resume_early(dev); |
bb808945 | 844 | |
f6dc1e5e | 845 | pci_update_current_state(pci_dev, PCI_D0); |
d67e37d7 | 846 | |
f6dc1e5e RW |
847 | if (drv && drv->pm && drv->pm->thaw_noirq) |
848 | error = drv->pm->thaw_noirq(dev); | |
bbb44d9f RW |
849 | |
850 | return error; | |
851 | } | |
852 | ||
f6dc1e5e | 853 | static int pci_pm_thaw(struct device *dev) |
bbb44d9f | 854 | { |
355a72d7 | 855 | struct pci_dev *pci_dev = to_pci_dev(dev); |
8150f32b | 856 | const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; |
bbb44d9f RW |
857 | int error = 0; |
858 | ||
ad8cfa1d | 859 | if (pci_has_legacy_pm_support(pci_dev)) |
f6dc1e5e | 860 | return pci_legacy_resume(dev); |
bb808945 | 861 | |
5294e256 RW |
862 | if (pm) { |
863 | if (pm->thaw) | |
864 | error = pm->thaw(dev); | |
865 | } else { | |
866 | pci_pm_reenable_device(pci_dev); | |
867 | } | |
bbb44d9f | 868 | |
4b77b0a2 RW |
869 | pci_dev->state_saved = false; |
870 | ||
bbb44d9f RW |
871 | return error; |
872 | } | |
873 | ||
874 | static int pci_pm_poweroff(struct device *dev) | |
875 | { | |
355a72d7 | 876 | struct pci_dev *pci_dev = to_pci_dev(dev); |
8150f32b | 877 | const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; |
bbb44d9f | 878 | |
ad8cfa1d RW |
879 | if (pci_has_legacy_pm_support(pci_dev)) |
880 | return pci_legacy_suspend(dev, PMSG_HIBERNATE); | |
bb808945 | 881 | |
5294e256 RW |
882 | if (!pm) { |
883 | pci_pm_default_suspend(pci_dev); | |
884 | goto Fixup; | |
885 | } | |
886 | ||
5294e256 | 887 | if (pm->poweroff) { |
46939f8b RW |
888 | int error; |
889 | ||
ddb7c9d2 RW |
890 | error = pm->poweroff(dev); |
891 | suspend_report_result(pm->poweroff, error); | |
46939f8b RW |
892 | if (error) |
893 | return error; | |
bbb44d9f RW |
894 | } |
895 | ||
5294e256 RW |
896 | Fixup: |
897 | pci_fixup_device(pci_fixup_suspend, pci_dev); | |
c9b9972b | 898 | |
46939f8b | 899 | return 0; |
bbb44d9f RW |
900 | } |
901 | ||
902 | static int pci_pm_poweroff_noirq(struct device *dev) | |
903 | { | |
46939f8b | 904 | struct pci_dev *pci_dev = to_pci_dev(dev); |
adf09493 | 905 | struct device_driver *drv = dev->driver; |
bbb44d9f | 906 | |
bb808945 RW |
907 | if (pci_has_legacy_pm_support(to_pci_dev(dev))) |
908 | return pci_legacy_suspend_late(dev, PMSG_HIBERNATE); | |
909 | ||
46939f8b RW |
910 | if (!drv || !drv->pm) |
911 | return 0; | |
912 | ||
913 | if (drv->pm->poweroff_noirq) { | |
914 | int error; | |
915 | ||
d67e37d7 RW |
916 | error = drv->pm->poweroff_noirq(dev); |
917 | suspend_report_result(drv->pm->poweroff_noirq, error); | |
46939f8b RW |
918 | if (error) |
919 | return error; | |
bbb44d9f RW |
920 | } |
921 | ||
46939f8b RW |
922 | if (!pci_dev->state_saved && !pci_is_bridge(pci_dev)) |
923 | pci_prepare_to_sleep(pci_dev); | |
924 | ||
925 | return 0; | |
bbb44d9f RW |
926 | } |
927 | ||
f6dc1e5e | 928 | static int pci_pm_restore_noirq(struct device *dev) |
bbb44d9f RW |
929 | { |
930 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
931 | struct device_driver *drv = dev->driver; | |
355a72d7 | 932 | int error = 0; |
bbb44d9f | 933 | |
6cbf8214 | 934 | pci_pm_default_resume_early(pci_dev); |
aa8c6c93 | 935 | |
ad8cfa1d | 936 | if (pci_has_legacy_pm_support(pci_dev)) |
f6dc1e5e | 937 | return pci_legacy_resume_early(dev); |
bb808945 | 938 | |
f6dc1e5e RW |
939 | if (drv && drv->pm && drv->pm->restore_noirq) |
940 | error = drv->pm->restore_noirq(dev); | |
bbb44d9f RW |
941 | |
942 | return error; | |
943 | } | |
944 | ||
f6dc1e5e | 945 | static int pci_pm_restore(struct device *dev) |
bbb44d9f RW |
946 | { |
947 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
8150f32b | 948 | const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; |
bbb44d9f RW |
949 | int error = 0; |
950 | ||
418e4da3 RW |
951 | /* |
952 | * This is necessary for the hibernation error path in which restore is | |
953 | * called without restoring the standard config registers of the device. | |
954 | */ | |
955 | if (pci_dev->state_saved) | |
956 | pci_restore_standard_config(pci_dev); | |
957 | ||
ad8cfa1d | 958 | if (pci_has_legacy_pm_support(pci_dev)) |
f6dc1e5e | 959 | return pci_legacy_resume(dev); |
bb808945 | 960 | |
5294e256 | 961 | pci_pm_default_resume(pci_dev); |
73410429 | 962 | |
5294e256 RW |
963 | if (pm) { |
964 | if (pm->restore) | |
965 | error = pm->restore(dev); | |
966 | } else { | |
967 | pci_pm_reenable_device(pci_dev); | |
968 | } | |
bbb44d9f RW |
969 | |
970 | return error; | |
c8958177 | 971 | } |
1da177e4 | 972 | |
bbb44d9f RW |
973 | #else /* !CONFIG_HIBERNATION */ |
974 | ||
975 | #define pci_pm_freeze NULL | |
976 | #define pci_pm_freeze_noirq NULL | |
977 | #define pci_pm_thaw NULL | |
978 | #define pci_pm_thaw_noirq NULL | |
979 | #define pci_pm_poweroff NULL | |
980 | #define pci_pm_poweroff_noirq NULL | |
981 | #define pci_pm_restore NULL | |
982 | #define pci_pm_restore_noirq NULL | |
983 | ||
984 | #endif /* !CONFIG_HIBERNATION */ | |
985 | ||
6cbf8214 RW |
986 | #ifdef CONFIG_PM_RUNTIME |
987 | ||
988 | static int pci_pm_runtime_suspend(struct device *dev) | |
989 | { | |
990 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
991 | const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; | |
992 | pci_power_t prev = pci_dev->current_state; | |
993 | int error; | |
994 | ||
995 | if (!pm || !pm->runtime_suspend) | |
996 | return -ENOSYS; | |
997 | ||
998 | error = pm->runtime_suspend(dev); | |
999 | suspend_report_result(pm->runtime_suspend, error); | |
1000 | if (error) | |
1001 | return error; | |
1002 | ||
1003 | pci_fixup_device(pci_fixup_suspend, pci_dev); | |
1004 | ||
1005 | if (!pci_dev->state_saved && pci_dev->current_state != PCI_D0 | |
1006 | && pci_dev->current_state != PCI_UNKNOWN) { | |
1007 | WARN_ONCE(pci_dev->current_state != prev, | |
1008 | "PCI PM: State of device not saved by %pF\n", | |
1009 | pm->runtime_suspend); | |
1010 | return 0; | |
1011 | } | |
1012 | ||
1013 | if (!pci_dev->state_saved) | |
1014 | pci_save_state(pci_dev); | |
1015 | ||
1016 | pci_finish_runtime_suspend(pci_dev); | |
1017 | ||
1018 | return 0; | |
1019 | } | |
1020 | ||
1021 | static int pci_pm_runtime_resume(struct device *dev) | |
1022 | { | |
1023 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
1024 | const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; | |
1025 | ||
1026 | if (!pm || !pm->runtime_resume) | |
1027 | return -ENOSYS; | |
1028 | ||
1029 | pci_pm_default_resume_early(pci_dev); | |
1030 | __pci_enable_wake(pci_dev, PCI_D0, true, false); | |
1031 | pci_fixup_device(pci_fixup_resume, pci_dev); | |
1032 | ||
1033 | return pm->runtime_resume(dev); | |
1034 | } | |
1035 | ||
1036 | static int pci_pm_runtime_idle(struct device *dev) | |
1037 | { | |
1038 | const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; | |
1039 | ||
1040 | if (!pm) | |
1041 | return -ENOSYS; | |
1042 | ||
1043 | if (pm->runtime_idle) { | |
1044 | int ret = pm->runtime_idle(dev); | |
1045 | if (ret) | |
1046 | return ret; | |
1047 | } | |
1048 | ||
1049 | pm_runtime_suspend(dev); | |
1050 | ||
1051 | return 0; | |
1052 | } | |
1053 | ||
1054 | #else /* !CONFIG_PM_RUNTIME */ | |
1055 | ||
1056 | #define pci_pm_runtime_suspend NULL | |
1057 | #define pci_pm_runtime_resume NULL | |
1058 | #define pci_pm_runtime_idle NULL | |
1059 | ||
1060 | #endif /* !CONFIG_PM_RUNTIME */ | |
1061 | ||
1062 | #ifdef CONFIG_PM_OPS | |
1063 | ||
8150f32b | 1064 | const struct dev_pm_ops pci_dev_pm_ops = { |
adf09493 RW |
1065 | .prepare = pci_pm_prepare, |
1066 | .complete = pci_pm_complete, | |
1067 | .suspend = pci_pm_suspend, | |
1068 | .resume = pci_pm_resume, | |
1069 | .freeze = pci_pm_freeze, | |
1070 | .thaw = pci_pm_thaw, | |
1071 | .poweroff = pci_pm_poweroff, | |
1072 | .restore = pci_pm_restore, | |
bbb44d9f RW |
1073 | .suspend_noirq = pci_pm_suspend_noirq, |
1074 | .resume_noirq = pci_pm_resume_noirq, | |
1075 | .freeze_noirq = pci_pm_freeze_noirq, | |
1076 | .thaw_noirq = pci_pm_thaw_noirq, | |
1077 | .poweroff_noirq = pci_pm_poweroff_noirq, | |
1078 | .restore_noirq = pci_pm_restore_noirq, | |
6cbf8214 RW |
1079 | .runtime_suspend = pci_pm_runtime_suspend, |
1080 | .runtime_resume = pci_pm_runtime_resume, | |
1081 | .runtime_idle = pci_pm_runtime_idle, | |
bbb44d9f RW |
1082 | }; |
1083 | ||
adf09493 | 1084 | #define PCI_PM_OPS_PTR (&pci_dev_pm_ops) |
bbb44d9f | 1085 | |
6cbf8214 | 1086 | #else /* !COMFIG_PM_OPS */ |
bbb44d9f RW |
1087 | |
1088 | #define PCI_PM_OPS_PTR NULL | |
1089 | ||
6cbf8214 | 1090 | #endif /* !COMFIG_PM_OPS */ |
bbb44d9f | 1091 | |
1da177e4 | 1092 | /** |
863b18f4 | 1093 | * __pci_register_driver - register a new pci driver |
1da177e4 | 1094 | * @drv: the driver structure to register |
863b18f4 | 1095 | * @owner: owner module of drv |
f95d882d | 1096 | * @mod_name: module name string |
1da177e4 LT |
1097 | * |
1098 | * Adds the driver structure to the list of registered drivers. | |
1099 | * Returns a negative value on error, otherwise 0. | |
eaae4b3a | 1100 | * If no error occurred, the driver remains registered even if |
1da177e4 LT |
1101 | * no device was claimed during registration. |
1102 | */ | |
725522b5 GKH |
1103 | int __pci_register_driver(struct pci_driver *drv, struct module *owner, |
1104 | const char *mod_name) | |
1da177e4 LT |
1105 | { |
1106 | int error; | |
1107 | ||
1108 | /* initialize common driver fields */ | |
1109 | drv->driver.name = drv->name; | |
1110 | drv->driver.bus = &pci_bus_type; | |
863b18f4 | 1111 | drv->driver.owner = owner; |
725522b5 | 1112 | drv->driver.mod_name = mod_name; |
50b00755 | 1113 | |
75865858 GKH |
1114 | spin_lock_init(&drv->dynids.lock); |
1115 | INIT_LIST_HEAD(&drv->dynids.list); | |
1da177e4 LT |
1116 | |
1117 | /* register with core */ | |
1118 | error = driver_register(&drv->driver); | |
50bf14b3 | 1119 | if (error) |
0994375e | 1120 | goto out; |
1da177e4 | 1121 | |
50bf14b3 AM |
1122 | error = pci_create_newid_file(drv); |
1123 | if (error) | |
0994375e | 1124 | goto out_newid; |
1da177e4 | 1125 | |
0994375e CW |
1126 | error = pci_create_removeid_file(drv); |
1127 | if (error) | |
1128 | goto out_removeid; | |
1129 | out: | |
1da177e4 | 1130 | return error; |
0994375e CW |
1131 | |
1132 | out_removeid: | |
1133 | pci_remove_newid_file(drv); | |
1134 | out_newid: | |
1135 | driver_unregister(&drv->driver); | |
1136 | goto out; | |
1da177e4 LT |
1137 | } |
1138 | ||
1139 | /** | |
1140 | * pci_unregister_driver - unregister a pci driver | |
1141 | * @drv: the driver structure to unregister | |
1142 | * | |
1143 | * Deletes the driver structure from the list of registered PCI drivers, | |
1144 | * gives it a chance to clean up by calling its remove() function for | |
1145 | * each device it was responsible for, and marks those devices as | |
1146 | * driverless. | |
1147 | */ | |
1148 | ||
1149 | void | |
1150 | pci_unregister_driver(struct pci_driver *drv) | |
1151 | { | |
0994375e | 1152 | pci_remove_removeid_file(drv); |
03d43b19 | 1153 | pci_remove_newid_file(drv); |
1da177e4 LT |
1154 | driver_unregister(&drv->driver); |
1155 | pci_free_dynids(drv); | |
1156 | } | |
1157 | ||
1158 | static struct pci_driver pci_compat_driver = { | |
1159 | .name = "compat" | |
1160 | }; | |
1161 | ||
1162 | /** | |
1163 | * pci_dev_driver - get the pci_driver of a device | |
1164 | * @dev: the device to query | |
1165 | * | |
1166 | * Returns the appropriate pci_driver structure or %NULL if there is no | |
1167 | * registered driver for the device. | |
1168 | */ | |
1169 | struct pci_driver * | |
1170 | pci_dev_driver(const struct pci_dev *dev) | |
1171 | { | |
1172 | if (dev->driver) | |
1173 | return dev->driver; | |
1174 | else { | |
1175 | int i; | |
1176 | for(i=0; i<=PCI_ROM_RESOURCE; i++) | |
1177 | if (dev->resource[i].flags & IORESOURCE_BUSY) | |
1178 | return &pci_compat_driver; | |
1179 | } | |
1180 | return NULL; | |
1181 | } | |
1182 | ||
1183 | /** | |
1184 | * pci_bus_match - Tell if a PCI device structure has a matching PCI device id structure | |
1da177e4 | 1185 | * @dev: the PCI device structure to match against |
8f7020d3 | 1186 | * @drv: the device driver to search for matching PCI device id structures |
1da177e4 LT |
1187 | * |
1188 | * Used by a driver to check whether a PCI device present in the | |
8f7020d3 | 1189 | * system is in its list of supported devices. Returns the matching |
1da177e4 LT |
1190 | * pci_device_id structure or %NULL if there is no match. |
1191 | */ | |
75865858 | 1192 | static int pci_bus_match(struct device *dev, struct device_driver *drv) |
1da177e4 | 1193 | { |
75865858 GKH |
1194 | struct pci_dev *pci_dev = to_pci_dev(dev); |
1195 | struct pci_driver *pci_drv = to_pci_driver(drv); | |
1da177e4 LT |
1196 | const struct pci_device_id *found_id; |
1197 | ||
75865858 | 1198 | found_id = pci_match_device(pci_drv, pci_dev); |
1da177e4 LT |
1199 | if (found_id) |
1200 | return 1; | |
1201 | ||
75865858 | 1202 | return 0; |
1da177e4 LT |
1203 | } |
1204 | ||
1205 | /** | |
1206 | * pci_dev_get - increments the reference count of the pci device structure | |
1207 | * @dev: the device being referenced | |
1208 | * | |
1209 | * Each live reference to a device should be refcounted. | |
1210 | * | |
1211 | * Drivers for PCI devices should normally record such references in | |
1212 | * their probe() methods, when they bind to a device, and release | |
1213 | * them by calling pci_dev_put(), in their disconnect() methods. | |
1214 | * | |
1215 | * A pointer to the device with the incremented reference counter is returned. | |
1216 | */ | |
1217 | struct pci_dev *pci_dev_get(struct pci_dev *dev) | |
1218 | { | |
1219 | if (dev) | |
1220 | get_device(&dev->dev); | |
1221 | return dev; | |
1222 | } | |
1223 | ||
1224 | /** | |
1225 | * pci_dev_put - release a use of the pci device structure | |
1226 | * @dev: device that's been disconnected | |
1227 | * | |
1228 | * Must be called when a user of a device is finished with it. When the last | |
1229 | * user of the device calls this function, the memory of the device is freed. | |
1230 | */ | |
1231 | void pci_dev_put(struct pci_dev *dev) | |
1232 | { | |
1233 | if (dev) | |
1234 | put_device(&dev->dev); | |
1235 | } | |
1236 | ||
1237 | #ifndef CONFIG_HOTPLUG | |
7eff2e7a | 1238 | int pci_uevent(struct device *dev, struct kobj_uevent_env *env) |
1da177e4 LT |
1239 | { |
1240 | return -ENODEV; | |
1241 | } | |
1242 | #endif | |
1243 | ||
1244 | struct bus_type pci_bus_type = { | |
1245 | .name = "pci", | |
1246 | .match = pci_bus_match, | |
312c004d | 1247 | .uevent = pci_uevent, |
b15d686a RK |
1248 | .probe = pci_device_probe, |
1249 | .remove = pci_device_remove, | |
cbd69dbb | 1250 | .shutdown = pci_device_shutdown, |
1da177e4 | 1251 | .dev_attrs = pci_dev_attrs, |
705b1aaa | 1252 | .bus_attrs = pci_bus_attrs, |
bbb44d9f | 1253 | .pm = PCI_PM_OPS_PTR, |
1da177e4 LT |
1254 | }; |
1255 | ||
1256 | static int __init pci_driver_init(void) | |
1257 | { | |
1258 | return bus_register(&pci_bus_type); | |
1259 | } | |
1260 | ||
1261 | postcore_initcall(pci_driver_init); | |
1262 | ||
9dba910e | 1263 | EXPORT_SYMBOL_GPL(pci_add_dynid); |
75865858 | 1264 | EXPORT_SYMBOL(pci_match_id); |
863b18f4 | 1265 | EXPORT_SYMBOL(__pci_register_driver); |
1da177e4 LT |
1266 | EXPORT_SYMBOL(pci_unregister_driver); |
1267 | EXPORT_SYMBOL(pci_dev_driver); | |
1268 | EXPORT_SYMBOL(pci_bus_type); | |
1269 | EXPORT_SYMBOL(pci_dev_get); | |
1270 | EXPORT_SYMBOL(pci_dev_put); |