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 LT |
340 | /** |
341 | * __pci_device_probe() | |
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 | ||
452 | return pci_restore_state(pci_dev); | |
453 | } | |
454 | ||
455 | static void pci_pm_default_resume_early(struct pci_dev *pci_dev) | |
456 | { | |
457 | pci_restore_standard_config(pci_dev); | |
458 | pci_fixup_device(pci_fixup_resume_early, pci_dev); | |
459 | } | |
460 | ||
461 | #endif | |
462 | ||
bbb44d9f RW |
463 | #ifdef CONFIG_PM_SLEEP |
464 | ||
fa58d305 RW |
465 | /* |
466 | * Default "suspend" method for devices that have no driver provided suspend, | |
467 | * or not even a driver at all (second part). | |
bbb44d9f | 468 | */ |
bb808945 | 469 | static void pci_pm_set_unknown_state(struct pci_dev *pci_dev) |
bbb44d9f | 470 | { |
bbb44d9f RW |
471 | /* |
472 | * mark its power state as "unknown", since we don't know if | |
473 | * e.g. the BIOS will change its device state when we suspend. | |
474 | */ | |
475 | if (pci_dev->current_state == PCI_D0) | |
476 | pci_dev->current_state = PCI_UNKNOWN; | |
477 | } | |
478 | ||
355a72d7 RW |
479 | /* |
480 | * Default "resume" method for devices that have no driver provided resume, | |
481 | * or not even a driver at all (second part). | |
482 | */ | |
bb808945 | 483 | static int pci_pm_reenable_device(struct pci_dev *pci_dev) |
355a72d7 RW |
484 | { |
485 | int retval; | |
486 | ||
bbb44d9f RW |
487 | /* if the device was enabled before suspend, reenable */ |
488 | retval = pci_reenable_device(pci_dev); | |
489 | /* | |
490 | * if the device was busmaster before the suspend, make it busmaster | |
491 | * again | |
492 | */ | |
493 | if (pci_dev->is_busmaster) | |
494 | pci_set_master(pci_dev); | |
495 | ||
496 | return retval; | |
497 | } | |
498 | ||
499 | static int pci_legacy_suspend(struct device *dev, pm_message_t state) | |
1da177e4 LT |
500 | { |
501 | struct pci_dev * pci_dev = to_pci_dev(dev); | |
502 | struct pci_driver * drv = pci_dev->driver; | |
46939f8b | 503 | |
02669492 | 504 | if (drv && drv->suspend) { |
99dadce8 | 505 | pci_power_t prev = pci_dev->current_state; |
46939f8b | 506 | int error; |
aa8c6c93 | 507 | |
57ef8026 FP |
508 | error = drv->suspend(pci_dev, state); |
509 | suspend_report_result(drv->suspend, error); | |
510 | if (error) | |
511 | return error; | |
aa8c6c93 | 512 | |
46939f8b | 513 | if (!pci_dev->state_saved && pci_dev->current_state != PCI_D0 |
99dadce8 RW |
514 | && pci_dev->current_state != PCI_UNKNOWN) { |
515 | WARN_ONCE(pci_dev->current_state != prev, | |
516 | "PCI PM: Device state not saved by %pF\n", | |
517 | drv->suspend); | |
99dadce8 | 518 | } |
02669492 | 519 | } |
ad8cfa1d RW |
520 | |
521 | pci_fixup_device(pci_fixup_suspend, pci_dev); | |
522 | ||
46939f8b | 523 | return 0; |
1da177e4 LT |
524 | } |
525 | ||
bbb44d9f | 526 | static int pci_legacy_suspend_late(struct device *dev, pm_message_t state) |
cbd69dbb LT |
527 | { |
528 | struct pci_dev * pci_dev = to_pci_dev(dev); | |
529 | struct pci_driver * drv = pci_dev->driver; | |
cbd69dbb LT |
530 | |
531 | if (drv && drv->suspend_late) { | |
46939f8b RW |
532 | pci_power_t prev = pci_dev->current_state; |
533 | int error; | |
534 | ||
57ef8026 FP |
535 | error = drv->suspend_late(pci_dev, state); |
536 | suspend_report_result(drv->suspend_late, error); | |
46939f8b RW |
537 | if (error) |
538 | return error; | |
539 | ||
540 | if (!pci_dev->state_saved && pci_dev->current_state != PCI_D0 | |
541 | && pci_dev->current_state != PCI_UNKNOWN) { | |
542 | WARN_ONCE(pci_dev->current_state != prev, | |
543 | "PCI PM: Device state not saved by %pF\n", | |
544 | drv->suspend_late); | |
545 | return 0; | |
546 | } | |
cbd69dbb | 547 | } |
46939f8b RW |
548 | |
549 | if (!pci_dev->state_saved) | |
550 | pci_save_state(pci_dev); | |
551 | ||
552 | pci_pm_set_unknown_state(pci_dev); | |
553 | ||
554 | return 0; | |
cbd69dbb | 555 | } |
1da177e4 | 556 | |
f6dc1e5e RW |
557 | static int pci_legacy_resume_early(struct device *dev) |
558 | { | |
f6dc1e5e RW |
559 | struct pci_dev * pci_dev = to_pci_dev(dev); |
560 | struct pci_driver * drv = pci_dev->driver; | |
561 | ||
aa8c6c93 RW |
562 | return drv && drv->resume_early ? |
563 | drv->resume_early(pci_dev) : 0; | |
f6dc1e5e RW |
564 | } |
565 | ||
bbb44d9f | 566 | static int pci_legacy_resume(struct device *dev) |
1da177e4 LT |
567 | { |
568 | struct pci_dev * pci_dev = to_pci_dev(dev); | |
569 | struct pci_driver * drv = pci_dev->driver; | |
570 | ||
ad8cfa1d RW |
571 | pci_fixup_device(pci_fixup_resume, pci_dev); |
572 | ||
aa8c6c93 RW |
573 | return drv && drv->resume ? |
574 | drv->resume(pci_dev) : pci_pm_reenable_device(pci_dev); | |
1da177e4 LT |
575 | } |
576 | ||
571ff758 RW |
577 | /* Auxiliary functions used by the new power management framework */ |
578 | ||
5294e256 | 579 | static void pci_pm_default_resume(struct pci_dev *pci_dev) |
571ff758 | 580 | { |
73410429 RW |
581 | pci_fixup_device(pci_fixup_resume, pci_dev); |
582 | ||
5294e256 RW |
583 | if (!pci_is_bridge(pci_dev)) |
584 | pci_enable_wake(pci_dev, PCI_D0, false); | |
571ff758 RW |
585 | } |
586 | ||
5294e256 | 587 | static void pci_pm_default_suspend(struct pci_dev *pci_dev) |
73410429 | 588 | { |
5294e256 | 589 | /* Disable non-bridge devices without PM support */ |
cbbc2f6b RW |
590 | if (!pci_is_bridge(pci_dev)) |
591 | pci_disable_enabled_device(pci_dev); | |
73410429 RW |
592 | } |
593 | ||
07e836e8 RW |
594 | static bool pci_has_legacy_pm_support(struct pci_dev *pci_dev) |
595 | { | |
596 | struct pci_driver *drv = pci_dev->driver; | |
bb808945 | 597 | bool ret = drv && (drv->suspend || drv->suspend_late || drv->resume |
07e836e8 | 598 | || drv->resume_early); |
bb808945 RW |
599 | |
600 | /* | |
601 | * Legacy PM support is used by default, so warn if the new framework is | |
602 | * supported as well. Drivers are supposed to support either the | |
603 | * former, or the latter, but not both at the same time. | |
604 | */ | |
605 | WARN_ON(ret && drv->driver.pm); | |
606 | ||
607 | return ret; | |
07e836e8 RW |
608 | } |
609 | ||
571ff758 RW |
610 | /* New power management framework */ |
611 | ||
bbb44d9f RW |
612 | static int pci_pm_prepare(struct device *dev) |
613 | { | |
614 | struct device_driver *drv = dev->driver; | |
615 | int error = 0; | |
616 | ||
6cbf8214 RW |
617 | /* |
618 | * PCI devices suspended at run time need to be resumed at this | |
619 | * point, because in general it is necessary to reconfigure them for | |
620 | * system suspend. Namely, if the device is supposed to wake up the | |
621 | * system from the sleep state, we may need to reconfigure it for this | |
622 | * purpose. In turn, if the device is not supposed to wake up the | |
623 | * system from the sleep state, we'll have to prevent it from signaling | |
624 | * wake-up. | |
625 | */ | |
626 | pm_runtime_resume(dev); | |
627 | ||
bbb44d9f RW |
628 | if (drv && drv->pm && drv->pm->prepare) |
629 | error = drv->pm->prepare(dev); | |
630 | ||
631 | return error; | |
632 | } | |
633 | ||
634 | static void pci_pm_complete(struct device *dev) | |
635 | { | |
636 | struct device_driver *drv = dev->driver; | |
637 | ||
638 | if (drv && drv->pm && drv->pm->complete) | |
639 | drv->pm->complete(dev); | |
640 | } | |
641 | ||
6cbf8214 RW |
642 | #else /* !CONFIG_PM_SLEEP */ |
643 | ||
644 | #define pci_pm_prepare NULL | |
645 | #define pci_pm_complete NULL | |
646 | ||
647 | #endif /* !CONFIG_PM_SLEEP */ | |
648 | ||
bbb44d9f RW |
649 | #ifdef CONFIG_SUSPEND |
650 | ||
651 | static int pci_pm_suspend(struct device *dev) | |
652 | { | |
653 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
8150f32b | 654 | const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; |
bbb44d9f | 655 | |
ad8cfa1d RW |
656 | if (pci_has_legacy_pm_support(pci_dev)) |
657 | return pci_legacy_suspend(dev, PMSG_SUSPEND); | |
bb808945 | 658 | |
5294e256 RW |
659 | if (!pm) { |
660 | pci_pm_default_suspend(pci_dev); | |
661 | goto Fixup; | |
662 | } | |
663 | ||
5294e256 RW |
664 | if (pm->suspend) { |
665 | pci_power_t prev = pci_dev->current_state; | |
666 | int error; | |
667 | ||
ddb7c9d2 RW |
668 | error = pm->suspend(dev); |
669 | suspend_report_result(pm->suspend, error); | |
5294e256 RW |
670 | if (error) |
671 | return error; | |
672 | ||
46939f8b | 673 | if (!pci_dev->state_saved && pci_dev->current_state != PCI_D0 |
5294e256 RW |
674 | && pci_dev->current_state != PCI_UNKNOWN) { |
675 | WARN_ONCE(pci_dev->current_state != prev, | |
676 | "PCI PM: State of device not saved by %pF\n", | |
677 | pm->suspend); | |
5294e256 | 678 | } |
bbb44d9f | 679 | } |
fa58d305 | 680 | |
5294e256 RW |
681 | Fixup: |
682 | pci_fixup_device(pci_fixup_suspend, pci_dev); | |
683 | ||
684 | return 0; | |
bbb44d9f RW |
685 | } |
686 | ||
687 | static int pci_pm_suspend_noirq(struct device *dev) | |
c8958177 | 688 | { |
355a72d7 | 689 | struct pci_dev *pci_dev = to_pci_dev(dev); |
8150f32b | 690 | const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; |
c8958177 | 691 | |
bb808945 RW |
692 | if (pci_has_legacy_pm_support(pci_dev)) |
693 | return pci_legacy_suspend_late(dev, PMSG_SUSPEND); | |
694 | ||
931ff68a RW |
695 | if (!pm) { |
696 | pci_save_state(pci_dev); | |
46939f8b | 697 | return 0; |
931ff68a | 698 | } |
46939f8b RW |
699 | |
700 | if (pm->suspend_noirq) { | |
701 | pci_power_t prev = pci_dev->current_state; | |
702 | int error; | |
703 | ||
704 | error = pm->suspend_noirq(dev); | |
705 | suspend_report_result(pm->suspend_noirq, error); | |
706 | if (error) | |
707 | return error; | |
708 | ||
709 | if (!pci_dev->state_saved && pci_dev->current_state != PCI_D0 | |
710 | && pci_dev->current_state != PCI_UNKNOWN) { | |
711 | WARN_ONCE(pci_dev->current_state != prev, | |
712 | "PCI PM: State of device not saved by %pF\n", | |
713 | pm->suspend_noirq); | |
714 | return 0; | |
715 | } | |
bbb44d9f RW |
716 | } |
717 | ||
46939f8b RW |
718 | if (!pci_dev->state_saved) { |
719 | pci_save_state(pci_dev); | |
720 | if (!pci_is_bridge(pci_dev)) | |
721 | pci_prepare_to_sleep(pci_dev); | |
722 | } | |
d67e37d7 | 723 | |
46939f8b RW |
724 | pci_pm_set_unknown_state(pci_dev); |
725 | ||
726 | return 0; | |
c8958177 | 727 | } |
1da177e4 | 728 | |
f6dc1e5e | 729 | static int pci_pm_resume_noirq(struct device *dev) |
bbb44d9f RW |
730 | { |
731 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
732 | struct device_driver *drv = dev->driver; | |
355a72d7 | 733 | int error = 0; |
bbb44d9f | 734 | |
6cbf8214 | 735 | pci_pm_default_resume_early(pci_dev); |
aa8c6c93 | 736 | |
ad8cfa1d | 737 | if (pci_has_legacy_pm_support(pci_dev)) |
f6dc1e5e | 738 | return pci_legacy_resume_early(dev); |
bb808945 | 739 | |
f6dc1e5e RW |
740 | if (drv && drv->pm && drv->pm->resume_noirq) |
741 | error = drv->pm->resume_noirq(dev); | |
bbb44d9f RW |
742 | |
743 | return error; | |
744 | } | |
745 | ||
f6dc1e5e | 746 | static int pci_pm_resume(struct device *dev) |
bbb44d9f | 747 | { |
355a72d7 | 748 | struct pci_dev *pci_dev = to_pci_dev(dev); |
8150f32b | 749 | const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; |
bbb44d9f RW |
750 | int error = 0; |
751 | ||
418e4da3 RW |
752 | /* |
753 | * This is necessary for the suspend error path in which resume is | |
754 | * called without restoring the standard config registers of the device. | |
755 | */ | |
756 | if (pci_dev->state_saved) | |
757 | pci_restore_standard_config(pci_dev); | |
758 | ||
ad8cfa1d | 759 | if (pci_has_legacy_pm_support(pci_dev)) |
f6dc1e5e | 760 | return pci_legacy_resume(dev); |
bb808945 | 761 | |
5294e256 | 762 | pci_pm_default_resume(pci_dev); |
73410429 | 763 | |
5294e256 RW |
764 | if (pm) { |
765 | if (pm->resume) | |
766 | error = pm->resume(dev); | |
767 | } else { | |
768 | pci_pm_reenable_device(pci_dev); | |
769 | } | |
bbb44d9f | 770 | |
999cce4a | 771 | return error; |
bbb44d9f RW |
772 | } |
773 | ||
774 | #else /* !CONFIG_SUSPEND */ | |
775 | ||
776 | #define pci_pm_suspend NULL | |
777 | #define pci_pm_suspend_noirq NULL | |
778 | #define pci_pm_resume NULL | |
779 | #define pci_pm_resume_noirq NULL | |
780 | ||
781 | #endif /* !CONFIG_SUSPEND */ | |
782 | ||
783 | #ifdef CONFIG_HIBERNATION | |
784 | ||
785 | static int pci_pm_freeze(struct device *dev) | |
786 | { | |
787 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
8150f32b | 788 | const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; |
bbb44d9f | 789 | |
ad8cfa1d RW |
790 | if (pci_has_legacy_pm_support(pci_dev)) |
791 | return pci_legacy_suspend(dev, PMSG_FREEZE); | |
bb808945 | 792 | |
5294e256 RW |
793 | if (!pm) { |
794 | pci_pm_default_suspend(pci_dev); | |
795 | return 0; | |
bbb44d9f RW |
796 | } |
797 | ||
5294e256 RW |
798 | if (pm->freeze) { |
799 | int error; | |
800 | ||
801 | error = pm->freeze(dev); | |
802 | suspend_report_result(pm->freeze, error); | |
803 | if (error) | |
804 | return error; | |
805 | } | |
806 | ||
5294e256 | 807 | return 0; |
bbb44d9f RW |
808 | } |
809 | ||
810 | static int pci_pm_freeze_noirq(struct device *dev) | |
811 | { | |
355a72d7 | 812 | struct pci_dev *pci_dev = to_pci_dev(dev); |
adf09493 | 813 | struct device_driver *drv = dev->driver; |
bbb44d9f | 814 | |
bb808945 RW |
815 | if (pci_has_legacy_pm_support(pci_dev)) |
816 | return pci_legacy_suspend_late(dev, PMSG_FREEZE); | |
817 | ||
d67e37d7 | 818 | if (drv && drv->pm && drv->pm->freeze_noirq) { |
46939f8b RW |
819 | int error; |
820 | ||
d67e37d7 RW |
821 | error = drv->pm->freeze_noirq(dev); |
822 | suspend_report_result(drv->pm->freeze_noirq, error); | |
46939f8b RW |
823 | if (error) |
824 | return error; | |
bbb44d9f RW |
825 | } |
826 | ||
46939f8b RW |
827 | if (!pci_dev->state_saved) |
828 | pci_save_state(pci_dev); | |
d67e37d7 | 829 | |
46939f8b RW |
830 | pci_pm_set_unknown_state(pci_dev); |
831 | ||
832 | return 0; | |
bbb44d9f RW |
833 | } |
834 | ||
f6dc1e5e | 835 | static int pci_pm_thaw_noirq(struct device *dev) |
bbb44d9f | 836 | { |
355a72d7 | 837 | struct pci_dev *pci_dev = to_pci_dev(dev); |
bbb44d9f RW |
838 | struct device_driver *drv = dev->driver; |
839 | int error = 0; | |
840 | ||
ad8cfa1d | 841 | if (pci_has_legacy_pm_support(pci_dev)) |
f6dc1e5e | 842 | return pci_legacy_resume_early(dev); |
bb808945 | 843 | |
f6dc1e5e | 844 | pci_update_current_state(pci_dev, PCI_D0); |
d67e37d7 | 845 | |
f6dc1e5e RW |
846 | if (drv && drv->pm && drv->pm->thaw_noirq) |
847 | error = drv->pm->thaw_noirq(dev); | |
bbb44d9f RW |
848 | |
849 | return error; | |
850 | } | |
851 | ||
f6dc1e5e | 852 | static int pci_pm_thaw(struct device *dev) |
bbb44d9f | 853 | { |
355a72d7 | 854 | struct pci_dev *pci_dev = to_pci_dev(dev); |
8150f32b | 855 | const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; |
bbb44d9f RW |
856 | int error = 0; |
857 | ||
ad8cfa1d | 858 | if (pci_has_legacy_pm_support(pci_dev)) |
f6dc1e5e | 859 | return pci_legacy_resume(dev); |
bb808945 | 860 | |
5294e256 RW |
861 | if (pm) { |
862 | if (pm->thaw) | |
863 | error = pm->thaw(dev); | |
864 | } else { | |
865 | pci_pm_reenable_device(pci_dev); | |
866 | } | |
bbb44d9f | 867 | |
4b77b0a2 RW |
868 | pci_dev->state_saved = false; |
869 | ||
bbb44d9f RW |
870 | return error; |
871 | } | |
872 | ||
873 | static int pci_pm_poweroff(struct device *dev) | |
874 | { | |
355a72d7 | 875 | struct pci_dev *pci_dev = to_pci_dev(dev); |
8150f32b | 876 | const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; |
bbb44d9f | 877 | |
ad8cfa1d RW |
878 | if (pci_has_legacy_pm_support(pci_dev)) |
879 | return pci_legacy_suspend(dev, PMSG_HIBERNATE); | |
bb808945 | 880 | |
5294e256 RW |
881 | if (!pm) { |
882 | pci_pm_default_suspend(pci_dev); | |
883 | goto Fixup; | |
884 | } | |
885 | ||
5294e256 | 886 | if (pm->poweroff) { |
46939f8b RW |
887 | int error; |
888 | ||
ddb7c9d2 RW |
889 | error = pm->poweroff(dev); |
890 | suspend_report_result(pm->poweroff, error); | |
46939f8b RW |
891 | if (error) |
892 | return error; | |
bbb44d9f RW |
893 | } |
894 | ||
5294e256 RW |
895 | Fixup: |
896 | pci_fixup_device(pci_fixup_suspend, pci_dev); | |
c9b9972b | 897 | |
46939f8b | 898 | return 0; |
bbb44d9f RW |
899 | } |
900 | ||
901 | static int pci_pm_poweroff_noirq(struct device *dev) | |
902 | { | |
46939f8b | 903 | struct pci_dev *pci_dev = to_pci_dev(dev); |
adf09493 | 904 | struct device_driver *drv = dev->driver; |
bbb44d9f | 905 | |
bb808945 RW |
906 | if (pci_has_legacy_pm_support(to_pci_dev(dev))) |
907 | return pci_legacy_suspend_late(dev, PMSG_HIBERNATE); | |
908 | ||
46939f8b RW |
909 | if (!drv || !drv->pm) |
910 | return 0; | |
911 | ||
912 | if (drv->pm->poweroff_noirq) { | |
913 | int error; | |
914 | ||
d67e37d7 RW |
915 | error = drv->pm->poweroff_noirq(dev); |
916 | suspend_report_result(drv->pm->poweroff_noirq, error); | |
46939f8b RW |
917 | if (error) |
918 | return error; | |
bbb44d9f RW |
919 | } |
920 | ||
46939f8b RW |
921 | if (!pci_dev->state_saved && !pci_is_bridge(pci_dev)) |
922 | pci_prepare_to_sleep(pci_dev); | |
923 | ||
924 | return 0; | |
bbb44d9f RW |
925 | } |
926 | ||
f6dc1e5e | 927 | static int pci_pm_restore_noirq(struct device *dev) |
bbb44d9f RW |
928 | { |
929 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
930 | struct device_driver *drv = dev->driver; | |
355a72d7 | 931 | int error = 0; |
bbb44d9f | 932 | |
6cbf8214 | 933 | pci_pm_default_resume_early(pci_dev); |
aa8c6c93 | 934 | |
ad8cfa1d | 935 | if (pci_has_legacy_pm_support(pci_dev)) |
f6dc1e5e | 936 | return pci_legacy_resume_early(dev); |
bb808945 | 937 | |
f6dc1e5e RW |
938 | if (drv && drv->pm && drv->pm->restore_noirq) |
939 | error = drv->pm->restore_noirq(dev); | |
bbb44d9f RW |
940 | |
941 | return error; | |
942 | } | |
943 | ||
f6dc1e5e | 944 | static int pci_pm_restore(struct device *dev) |
bbb44d9f RW |
945 | { |
946 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
8150f32b | 947 | const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; |
bbb44d9f RW |
948 | int error = 0; |
949 | ||
418e4da3 RW |
950 | /* |
951 | * This is necessary for the hibernation error path in which restore is | |
952 | * called without restoring the standard config registers of the device. | |
953 | */ | |
954 | if (pci_dev->state_saved) | |
955 | pci_restore_standard_config(pci_dev); | |
956 | ||
ad8cfa1d | 957 | if (pci_has_legacy_pm_support(pci_dev)) |
f6dc1e5e | 958 | return pci_legacy_resume(dev); |
bb808945 | 959 | |
5294e256 | 960 | pci_pm_default_resume(pci_dev); |
73410429 | 961 | |
5294e256 RW |
962 | if (pm) { |
963 | if (pm->restore) | |
964 | error = pm->restore(dev); | |
965 | } else { | |
966 | pci_pm_reenable_device(pci_dev); | |
967 | } | |
bbb44d9f RW |
968 | |
969 | return error; | |
c8958177 | 970 | } |
1da177e4 | 971 | |
bbb44d9f RW |
972 | #else /* !CONFIG_HIBERNATION */ |
973 | ||
974 | #define pci_pm_freeze NULL | |
975 | #define pci_pm_freeze_noirq NULL | |
976 | #define pci_pm_thaw NULL | |
977 | #define pci_pm_thaw_noirq NULL | |
978 | #define pci_pm_poweroff NULL | |
979 | #define pci_pm_poweroff_noirq NULL | |
980 | #define pci_pm_restore NULL | |
981 | #define pci_pm_restore_noirq NULL | |
982 | ||
983 | #endif /* !CONFIG_HIBERNATION */ | |
984 | ||
6cbf8214 RW |
985 | #ifdef CONFIG_PM_RUNTIME |
986 | ||
987 | static int pci_pm_runtime_suspend(struct device *dev) | |
988 | { | |
989 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
990 | const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; | |
991 | pci_power_t prev = pci_dev->current_state; | |
992 | int error; | |
993 | ||
994 | if (!pm || !pm->runtime_suspend) | |
995 | return -ENOSYS; | |
996 | ||
997 | error = pm->runtime_suspend(dev); | |
998 | suspend_report_result(pm->runtime_suspend, error); | |
999 | if (error) | |
1000 | return error; | |
1001 | ||
1002 | pci_fixup_device(pci_fixup_suspend, pci_dev); | |
1003 | ||
1004 | if (!pci_dev->state_saved && pci_dev->current_state != PCI_D0 | |
1005 | && pci_dev->current_state != PCI_UNKNOWN) { | |
1006 | WARN_ONCE(pci_dev->current_state != prev, | |
1007 | "PCI PM: State of device not saved by %pF\n", | |
1008 | pm->runtime_suspend); | |
1009 | return 0; | |
1010 | } | |
1011 | ||
1012 | if (!pci_dev->state_saved) | |
1013 | pci_save_state(pci_dev); | |
1014 | ||
1015 | pci_finish_runtime_suspend(pci_dev); | |
1016 | ||
1017 | return 0; | |
1018 | } | |
1019 | ||
1020 | static int pci_pm_runtime_resume(struct device *dev) | |
1021 | { | |
1022 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
1023 | const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; | |
1024 | ||
1025 | if (!pm || !pm->runtime_resume) | |
1026 | return -ENOSYS; | |
1027 | ||
1028 | pci_pm_default_resume_early(pci_dev); | |
1029 | __pci_enable_wake(pci_dev, PCI_D0, true, false); | |
1030 | pci_fixup_device(pci_fixup_resume, pci_dev); | |
1031 | ||
1032 | return pm->runtime_resume(dev); | |
1033 | } | |
1034 | ||
1035 | static int pci_pm_runtime_idle(struct device *dev) | |
1036 | { | |
1037 | const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; | |
1038 | ||
1039 | if (!pm) | |
1040 | return -ENOSYS; | |
1041 | ||
1042 | if (pm->runtime_idle) { | |
1043 | int ret = pm->runtime_idle(dev); | |
1044 | if (ret) | |
1045 | return ret; | |
1046 | } | |
1047 | ||
1048 | pm_runtime_suspend(dev); | |
1049 | ||
1050 | return 0; | |
1051 | } | |
1052 | ||
1053 | #else /* !CONFIG_PM_RUNTIME */ | |
1054 | ||
1055 | #define pci_pm_runtime_suspend NULL | |
1056 | #define pci_pm_runtime_resume NULL | |
1057 | #define pci_pm_runtime_idle NULL | |
1058 | ||
1059 | #endif /* !CONFIG_PM_RUNTIME */ | |
1060 | ||
1061 | #ifdef CONFIG_PM_OPS | |
1062 | ||
8150f32b | 1063 | const struct dev_pm_ops pci_dev_pm_ops = { |
adf09493 RW |
1064 | .prepare = pci_pm_prepare, |
1065 | .complete = pci_pm_complete, | |
1066 | .suspend = pci_pm_suspend, | |
1067 | .resume = pci_pm_resume, | |
1068 | .freeze = pci_pm_freeze, | |
1069 | .thaw = pci_pm_thaw, | |
1070 | .poweroff = pci_pm_poweroff, | |
1071 | .restore = pci_pm_restore, | |
bbb44d9f RW |
1072 | .suspend_noirq = pci_pm_suspend_noirq, |
1073 | .resume_noirq = pci_pm_resume_noirq, | |
1074 | .freeze_noirq = pci_pm_freeze_noirq, | |
1075 | .thaw_noirq = pci_pm_thaw_noirq, | |
1076 | .poweroff_noirq = pci_pm_poweroff_noirq, | |
1077 | .restore_noirq = pci_pm_restore_noirq, | |
6cbf8214 RW |
1078 | .runtime_suspend = pci_pm_runtime_suspend, |
1079 | .runtime_resume = pci_pm_runtime_resume, | |
1080 | .runtime_idle = pci_pm_runtime_idle, | |
bbb44d9f RW |
1081 | }; |
1082 | ||
adf09493 | 1083 | #define PCI_PM_OPS_PTR (&pci_dev_pm_ops) |
bbb44d9f | 1084 | |
6cbf8214 | 1085 | #else /* !COMFIG_PM_OPS */ |
bbb44d9f RW |
1086 | |
1087 | #define PCI_PM_OPS_PTR NULL | |
1088 | ||
6cbf8214 | 1089 | #endif /* !COMFIG_PM_OPS */ |
bbb44d9f | 1090 | |
1da177e4 | 1091 | /** |
863b18f4 | 1092 | * __pci_register_driver - register a new pci driver |
1da177e4 | 1093 | * @drv: the driver structure to register |
863b18f4 | 1094 | * @owner: owner module of drv |
f95d882d | 1095 | * @mod_name: module name string |
1da177e4 LT |
1096 | * |
1097 | * Adds the driver structure to the list of registered drivers. | |
1098 | * Returns a negative value on error, otherwise 0. | |
eaae4b3a | 1099 | * If no error occurred, the driver remains registered even if |
1da177e4 LT |
1100 | * no device was claimed during registration. |
1101 | */ | |
725522b5 GKH |
1102 | int __pci_register_driver(struct pci_driver *drv, struct module *owner, |
1103 | const char *mod_name) | |
1da177e4 LT |
1104 | { |
1105 | int error; | |
1106 | ||
1107 | /* initialize common driver fields */ | |
1108 | drv->driver.name = drv->name; | |
1109 | drv->driver.bus = &pci_bus_type; | |
863b18f4 | 1110 | drv->driver.owner = owner; |
725522b5 | 1111 | drv->driver.mod_name = mod_name; |
50b00755 | 1112 | |
75865858 GKH |
1113 | spin_lock_init(&drv->dynids.lock); |
1114 | INIT_LIST_HEAD(&drv->dynids.list); | |
1da177e4 LT |
1115 | |
1116 | /* register with core */ | |
1117 | error = driver_register(&drv->driver); | |
50bf14b3 | 1118 | if (error) |
0994375e | 1119 | goto out; |
1da177e4 | 1120 | |
50bf14b3 AM |
1121 | error = pci_create_newid_file(drv); |
1122 | if (error) | |
0994375e | 1123 | goto out_newid; |
1da177e4 | 1124 | |
0994375e CW |
1125 | error = pci_create_removeid_file(drv); |
1126 | if (error) | |
1127 | goto out_removeid; | |
1128 | out: | |
1da177e4 | 1129 | return error; |
0994375e CW |
1130 | |
1131 | out_removeid: | |
1132 | pci_remove_newid_file(drv); | |
1133 | out_newid: | |
1134 | driver_unregister(&drv->driver); | |
1135 | goto out; | |
1da177e4 LT |
1136 | } |
1137 | ||
1138 | /** | |
1139 | * pci_unregister_driver - unregister a pci driver | |
1140 | * @drv: the driver structure to unregister | |
1141 | * | |
1142 | * Deletes the driver structure from the list of registered PCI drivers, | |
1143 | * gives it a chance to clean up by calling its remove() function for | |
1144 | * each device it was responsible for, and marks those devices as | |
1145 | * driverless. | |
1146 | */ | |
1147 | ||
1148 | void | |
1149 | pci_unregister_driver(struct pci_driver *drv) | |
1150 | { | |
0994375e | 1151 | pci_remove_removeid_file(drv); |
03d43b19 | 1152 | pci_remove_newid_file(drv); |
1da177e4 LT |
1153 | driver_unregister(&drv->driver); |
1154 | pci_free_dynids(drv); | |
1155 | } | |
1156 | ||
1157 | static struct pci_driver pci_compat_driver = { | |
1158 | .name = "compat" | |
1159 | }; | |
1160 | ||
1161 | /** | |
1162 | * pci_dev_driver - get the pci_driver of a device | |
1163 | * @dev: the device to query | |
1164 | * | |
1165 | * Returns the appropriate pci_driver structure or %NULL if there is no | |
1166 | * registered driver for the device. | |
1167 | */ | |
1168 | struct pci_driver * | |
1169 | pci_dev_driver(const struct pci_dev *dev) | |
1170 | { | |
1171 | if (dev->driver) | |
1172 | return dev->driver; | |
1173 | else { | |
1174 | int i; | |
1175 | for(i=0; i<=PCI_ROM_RESOURCE; i++) | |
1176 | if (dev->resource[i].flags & IORESOURCE_BUSY) | |
1177 | return &pci_compat_driver; | |
1178 | } | |
1179 | return NULL; | |
1180 | } | |
1181 | ||
1182 | /** | |
1183 | * pci_bus_match - Tell if a PCI device structure has a matching PCI device id structure | |
1da177e4 | 1184 | * @dev: the PCI device structure to match against |
8f7020d3 | 1185 | * @drv: the device driver to search for matching PCI device id structures |
1da177e4 LT |
1186 | * |
1187 | * Used by a driver to check whether a PCI device present in the | |
8f7020d3 | 1188 | * system is in its list of supported devices. Returns the matching |
1da177e4 LT |
1189 | * pci_device_id structure or %NULL if there is no match. |
1190 | */ | |
75865858 | 1191 | static int pci_bus_match(struct device *dev, struct device_driver *drv) |
1da177e4 | 1192 | { |
75865858 GKH |
1193 | struct pci_dev *pci_dev = to_pci_dev(dev); |
1194 | struct pci_driver *pci_drv = to_pci_driver(drv); | |
1da177e4 LT |
1195 | const struct pci_device_id *found_id; |
1196 | ||
75865858 | 1197 | found_id = pci_match_device(pci_drv, pci_dev); |
1da177e4 LT |
1198 | if (found_id) |
1199 | return 1; | |
1200 | ||
75865858 | 1201 | return 0; |
1da177e4 LT |
1202 | } |
1203 | ||
1204 | /** | |
1205 | * pci_dev_get - increments the reference count of the pci device structure | |
1206 | * @dev: the device being referenced | |
1207 | * | |
1208 | * Each live reference to a device should be refcounted. | |
1209 | * | |
1210 | * Drivers for PCI devices should normally record such references in | |
1211 | * their probe() methods, when they bind to a device, and release | |
1212 | * them by calling pci_dev_put(), in their disconnect() methods. | |
1213 | * | |
1214 | * A pointer to the device with the incremented reference counter is returned. | |
1215 | */ | |
1216 | struct pci_dev *pci_dev_get(struct pci_dev *dev) | |
1217 | { | |
1218 | if (dev) | |
1219 | get_device(&dev->dev); | |
1220 | return dev; | |
1221 | } | |
1222 | ||
1223 | /** | |
1224 | * pci_dev_put - release a use of the pci device structure | |
1225 | * @dev: device that's been disconnected | |
1226 | * | |
1227 | * Must be called when a user of a device is finished with it. When the last | |
1228 | * user of the device calls this function, the memory of the device is freed. | |
1229 | */ | |
1230 | void pci_dev_put(struct pci_dev *dev) | |
1231 | { | |
1232 | if (dev) | |
1233 | put_device(&dev->dev); | |
1234 | } | |
1235 | ||
1236 | #ifndef CONFIG_HOTPLUG | |
7eff2e7a | 1237 | int pci_uevent(struct device *dev, struct kobj_uevent_env *env) |
1da177e4 LT |
1238 | { |
1239 | return -ENODEV; | |
1240 | } | |
1241 | #endif | |
1242 | ||
1243 | struct bus_type pci_bus_type = { | |
1244 | .name = "pci", | |
1245 | .match = pci_bus_match, | |
312c004d | 1246 | .uevent = pci_uevent, |
b15d686a RK |
1247 | .probe = pci_device_probe, |
1248 | .remove = pci_device_remove, | |
cbd69dbb | 1249 | .shutdown = pci_device_shutdown, |
1da177e4 | 1250 | .dev_attrs = pci_dev_attrs, |
705b1aaa | 1251 | .bus_attrs = pci_bus_attrs, |
bbb44d9f | 1252 | .pm = PCI_PM_OPS_PTR, |
1da177e4 LT |
1253 | }; |
1254 | ||
1255 | static int __init pci_driver_init(void) | |
1256 | { | |
1257 | return bus_register(&pci_bus_type); | |
1258 | } | |
1259 | ||
1260 | postcore_initcall(pci_driver_init); | |
1261 | ||
9dba910e | 1262 | EXPORT_SYMBOL_GPL(pci_add_dynid); |
75865858 | 1263 | EXPORT_SYMBOL(pci_match_id); |
863b18f4 | 1264 | EXPORT_SYMBOL(__pci_register_driver); |
1da177e4 LT |
1265 | EXPORT_SYMBOL(pci_unregister_driver); |
1266 | EXPORT_SYMBOL(pci_dev_driver); | |
1267 | EXPORT_SYMBOL(pci_bus_type); | |
1268 | EXPORT_SYMBOL(pci_dev_get); | |
1269 | EXPORT_SYMBOL(pci_dev_put); |