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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * drivers/pci/pci-driver.c | |
3 | * | |
2b937303 GKH |
4 | * (C) Copyright 2002-2004, 2007 Greg Kroah-Hartman <greg@kroah.com> |
5 | * (C) Copyright 2007 Novell Inc. | |
6 | * | |
7 | * Released under the GPL v2 only. | |
8 | * | |
1da177e4 LT |
9 | */ |
10 | ||
11 | #include <linux/pci.h> | |
12 | #include <linux/module.h> | |
13 | #include <linux/init.h> | |
14 | #include <linux/device.h> | |
d42c6997 | 15 | #include <linux/mempolicy.h> |
4e57b681 TS |
16 | #include <linux/string.h> |
17 | #include <linux/slab.h> | |
8c65b4a6 | 18 | #include <linux/sched.h> |
873392ca | 19 | #include <linux/cpu.h> |
6cbf8214 | 20 | #include <linux/pm_runtime.h> |
eea3fc03 | 21 | #include <linux/suspend.h> |
1da177e4 LT |
22 | #include "pci.h" |
23 | ||
75865858 GKH |
24 | struct pci_dynid { |
25 | struct list_head node; | |
26 | struct pci_device_id id; | |
27 | }; | |
1da177e4 | 28 | |
9dba910e TH |
29 | /** |
30 | * pci_add_dynid - add a new PCI device ID to this driver and re-probe devices | |
31 | * @drv: target pci driver | |
32 | * @vendor: PCI vendor ID | |
33 | * @device: PCI device ID | |
34 | * @subvendor: PCI subvendor ID | |
35 | * @subdevice: PCI subdevice ID | |
36 | * @class: PCI class | |
37 | * @class_mask: PCI class mask | |
38 | * @driver_data: private driver data | |
39 | * | |
40 | * Adds a new dynamic pci device ID to this driver and causes the | |
41 | * driver to probe for all devices again. @drv must have been | |
42 | * registered prior to calling this function. | |
43 | * | |
44 | * CONTEXT: | |
45 | * Does GFP_KERNEL allocation. | |
46 | * | |
47 | * RETURNS: | |
48 | * 0 on success, -errno on failure. | |
49 | */ | |
50 | int pci_add_dynid(struct pci_driver *drv, | |
51 | unsigned int vendor, unsigned int device, | |
52 | unsigned int subvendor, unsigned int subdevice, | |
53 | unsigned int class, unsigned int class_mask, | |
54 | unsigned long driver_data) | |
55 | { | |
56 | struct pci_dynid *dynid; | |
57 | int retval; | |
58 | ||
59 | dynid = kzalloc(sizeof(*dynid), GFP_KERNEL); | |
60 | if (!dynid) | |
61 | return -ENOMEM; | |
62 | ||
63 | dynid->id.vendor = vendor; | |
64 | dynid->id.device = device; | |
65 | dynid->id.subvendor = subvendor; | |
66 | dynid->id.subdevice = subdevice; | |
67 | dynid->id.class = class; | |
68 | dynid->id.class_mask = class_mask; | |
69 | dynid->id.driver_data = driver_data; | |
3d3c2ae1 | 70 | |
9dba910e TH |
71 | spin_lock(&drv->dynids.lock); |
72 | list_add_tail(&dynid->node, &drv->dynids.list); | |
73 | spin_unlock(&drv->dynids.lock); | |
74 | ||
9dba910e | 75 | retval = driver_attach(&drv->driver); |
9dba910e TH |
76 | |
77 | return retval; | |
78 | } | |
79 | ||
80 | static void pci_free_dynids(struct pci_driver *drv) | |
81 | { | |
82 | struct pci_dynid *dynid, *n; | |
3d3c2ae1 | 83 | |
9dba910e TH |
84 | spin_lock(&drv->dynids.lock); |
85 | list_for_each_entry_safe(dynid, n, &drv->dynids.list, node) { | |
86 | list_del(&dynid->node); | |
87 | kfree(dynid); | |
88 | } | |
89 | spin_unlock(&drv->dynids.lock); | |
90 | } | |
91 | ||
92 | /* | |
93 | * Dynamic device ID manipulation via sysfs is disabled for !CONFIG_HOTPLUG | |
94 | */ | |
95 | #ifdef CONFIG_HOTPLUG | |
1da177e4 | 96 | /** |
9dba910e | 97 | * store_new_id - sysfs frontend to pci_add_dynid() |
8f7020d3 RD |
98 | * @driver: target device driver |
99 | * @buf: buffer for scanning device ID data | |
100 | * @count: input size | |
1da177e4 | 101 | * |
9dba910e | 102 | * Allow PCI IDs to be added to an existing driver via sysfs. |
1da177e4 | 103 | */ |
f8eb1005 | 104 | static ssize_t |
1da177e4 LT |
105 | store_new_id(struct device_driver *driver, const char *buf, size_t count) |
106 | { | |
1da177e4 | 107 | struct pci_driver *pdrv = to_pci_driver(driver); |
b41d6cf3 | 108 | const struct pci_device_id *ids = pdrv->id_table; |
6ba18636 | 109 | __u32 vendor, device, subvendor=PCI_ANY_ID, |
1da177e4 LT |
110 | subdevice=PCI_ANY_ID, class=0, class_mask=0; |
111 | unsigned long driver_data=0; | |
112 | int fields=0; | |
9dba910e | 113 | int retval; |
1da177e4 | 114 | |
b41d6cf3 | 115 | fields = sscanf(buf, "%x %x %x %x %x %x %lx", |
1da177e4 LT |
116 | &vendor, &device, &subvendor, &subdevice, |
117 | &class, &class_mask, &driver_data); | |
6ba18636 | 118 | if (fields < 2) |
1da177e4 LT |
119 | return -EINVAL; |
120 | ||
b41d6cf3 JD |
121 | /* Only accept driver_data values that match an existing id_table |
122 | entry */ | |
2debb4d2 CW |
123 | if (ids) { |
124 | retval = -EINVAL; | |
125 | while (ids->vendor || ids->subvendor || ids->class_mask) { | |
126 | if (driver_data == ids->driver_data) { | |
127 | retval = 0; | |
128 | break; | |
129 | } | |
130 | ids++; | |
b41d6cf3 | 131 | } |
2debb4d2 CW |
132 | if (retval) /* No match */ |
133 | return retval; | |
b41d6cf3 | 134 | } |
b41d6cf3 | 135 | |
9dba910e TH |
136 | retval = pci_add_dynid(pdrv, vendor, device, subvendor, subdevice, |
137 | class, class_mask, driver_data); | |
b19441af GKH |
138 | if (retval) |
139 | return retval; | |
1da177e4 LT |
140 | return count; |
141 | } | |
1da177e4 | 142 | static DRIVER_ATTR(new_id, S_IWUSR, NULL, store_new_id); |
1da177e4 | 143 | |
0994375e CW |
144 | /** |
145 | * store_remove_id - remove a PCI device ID from this driver | |
146 | * @driver: target device driver | |
147 | * @buf: buffer for scanning device ID data | |
148 | * @count: input size | |
149 | * | |
150 | * Removes a dynamic pci device ID to this driver. | |
151 | */ | |
152 | static ssize_t | |
153 | store_remove_id(struct device_driver *driver, const char *buf, size_t count) | |
154 | { | |
155 | struct pci_dynid *dynid, *n; | |
156 | struct pci_driver *pdrv = to_pci_driver(driver); | |
157 | __u32 vendor, device, subvendor = PCI_ANY_ID, | |
158 | subdevice = PCI_ANY_ID, class = 0, class_mask = 0; | |
159 | int fields = 0; | |
160 | int retval = -ENODEV; | |
161 | ||
162 | fields = sscanf(buf, "%x %x %x %x %x %x", | |
163 | &vendor, &device, &subvendor, &subdevice, | |
164 | &class, &class_mask); | |
165 | if (fields < 2) | |
166 | return -EINVAL; | |
167 | ||
168 | spin_lock(&pdrv->dynids.lock); | |
169 | list_for_each_entry_safe(dynid, n, &pdrv->dynids.list, node) { | |
170 | struct pci_device_id *id = &dynid->id; | |
171 | if ((id->vendor == vendor) && | |
172 | (id->device == device) && | |
173 | (subvendor == PCI_ANY_ID || id->subvendor == subvendor) && | |
174 | (subdevice == PCI_ANY_ID || id->subdevice == subdevice) && | |
175 | !((id->class ^ class) & class_mask)) { | |
176 | list_del(&dynid->node); | |
177 | kfree(dynid); | |
178 | retval = 0; | |
179 | break; | |
180 | } | |
181 | } | |
182 | spin_unlock(&pdrv->dynids.lock); | |
183 | ||
184 | if (retval) | |
185 | return retval; | |
186 | return count; | |
187 | } | |
188 | static DRIVER_ATTR(remove_id, S_IWUSR, NULL, store_remove_id); | |
189 | ||
1da177e4 | 190 | static int |
ed283e9f | 191 | pci_create_newid_files(struct pci_driver *drv) |
1da177e4 LT |
192 | { |
193 | int error = 0; | |
0994375e | 194 | |
ed283e9f AS |
195 | if (drv->probe != NULL) { |
196 | error = driver_create_file(&drv->driver, &driver_attr_new_id); | |
197 | if (error == 0) { | |
198 | error = driver_create_file(&drv->driver, | |
199 | &driver_attr_remove_id); | |
200 | if (error) | |
201 | driver_remove_file(&drv->driver, | |
202 | &driver_attr_new_id); | |
203 | } | |
204 | } | |
0994375e CW |
205 | return error; |
206 | } | |
207 | ||
ed283e9f | 208 | static void pci_remove_newid_files(struct pci_driver *drv) |
0994375e CW |
209 | { |
210 | driver_remove_file(&drv->driver, &driver_attr_remove_id); | |
ed283e9f | 211 | driver_remove_file(&drv->driver, &driver_attr_new_id); |
0994375e | 212 | } |
1da177e4 | 213 | #else /* !CONFIG_HOTPLUG */ |
ed283e9f | 214 | static inline int pci_create_newid_files(struct pci_driver *drv) |
1da177e4 LT |
215 | { |
216 | return 0; | |
217 | } | |
ed283e9f | 218 | static inline void pci_remove_newid_files(struct pci_driver *drv) {} |
1da177e4 LT |
219 | #endif |
220 | ||
221 | /** | |
75865858 | 222 | * pci_match_id - See if a pci device matches a given pci_id table |
1da177e4 | 223 | * @ids: array of PCI device id structures to search in |
75865858 GKH |
224 | * @dev: the PCI device structure to match against. |
225 | * | |
1da177e4 | 226 | * Used by a driver to check whether a PCI device present in the |
75865858 | 227 | * system is in its list of supported devices. Returns the matching |
1da177e4 | 228 | * pci_device_id structure or %NULL if there is no match. |
75865858 | 229 | * |
8b60756a | 230 | * Deprecated, don't use this as it will not catch any dynamic ids |
75865858 | 231 | * that a driver might want to check for. |
1da177e4 | 232 | */ |
75865858 GKH |
233 | const struct pci_device_id *pci_match_id(const struct pci_device_id *ids, |
234 | struct pci_dev *dev) | |
1da177e4 | 235 | { |
75865858 GKH |
236 | if (ids) { |
237 | while (ids->vendor || ids->subvendor || ids->class_mask) { | |
238 | if (pci_match_one_device(ids, dev)) | |
239 | return ids; | |
240 | ids++; | |
241 | } | |
1da177e4 LT |
242 | } |
243 | return NULL; | |
244 | } | |
245 | ||
246 | /** | |
ae9608af | 247 | * pci_match_device - Tell if a PCI device structure has a matching PCI device id structure |
75865858 | 248 | * @drv: the PCI driver to match against |
39ba487f | 249 | * @dev: the PCI device structure to match against |
75865858 GKH |
250 | * |
251 | * Used by a driver to check whether a PCI device present in the | |
252 | * system is in its list of supported devices. Returns the matching | |
253 | * pci_device_id structure or %NULL if there is no match. | |
1da177e4 | 254 | */ |
d73460d7 AB |
255 | static const struct pci_device_id *pci_match_device(struct pci_driver *drv, |
256 | struct pci_dev *dev) | |
75865858 | 257 | { |
75865858 | 258 | struct pci_dynid *dynid; |
1da177e4 | 259 | |
7461b60a | 260 | /* Look at the dynamic ids first, before the static ones */ |
75865858 GKH |
261 | spin_lock(&drv->dynids.lock); |
262 | list_for_each_entry(dynid, &drv->dynids.list, node) { | |
263 | if (pci_match_one_device(&dynid->id, dev)) { | |
264 | spin_unlock(&drv->dynids.lock); | |
265 | return &dynid->id; | |
266 | } | |
1da177e4 | 267 | } |
75865858 | 268 | spin_unlock(&drv->dynids.lock); |
7461b60a RK |
269 | |
270 | return pci_match_id(drv->id_table, dev); | |
1da177e4 LT |
271 | } |
272 | ||
873392ca RR |
273 | struct drv_dev_and_id { |
274 | struct pci_driver *drv; | |
275 | struct pci_dev *dev; | |
276 | const struct pci_device_id *id; | |
277 | }; | |
278 | ||
279 | static long local_pci_probe(void *_ddi) | |
280 | { | |
281 | struct drv_dev_and_id *ddi = _ddi; | |
f3ec4f87 AS |
282 | struct device *dev = &ddi->dev->dev; |
283 | int rc; | |
284 | ||
285 | /* Unbound PCI devices are always set to disabled and suspended. | |
286 | * During probe, the device is set to enabled and active and the | |
287 | * usage count is incremented. If the driver supports runtime PM, | |
288 | * it should call pm_runtime_put_noidle() in its probe routine and | |
289 | * pm_runtime_get_noresume() in its remove routine. | |
290 | */ | |
291 | pm_runtime_get_noresume(dev); | |
292 | pm_runtime_set_active(dev); | |
293 | pm_runtime_enable(dev); | |
294 | ||
295 | rc = ddi->drv->probe(ddi->dev, ddi->id); | |
296 | if (rc) { | |
297 | pm_runtime_disable(dev); | |
298 | pm_runtime_set_suspended(dev); | |
299 | pm_runtime_put_noidle(dev); | |
300 | } | |
301 | return rc; | |
873392ca RR |
302 | } |
303 | ||
d42c6997 AK |
304 | static int pci_call_probe(struct pci_driver *drv, struct pci_dev *dev, |
305 | const struct pci_device_id *id) | |
306 | { | |
873392ca RR |
307 | int error, node; |
308 | struct drv_dev_and_id ddi = { drv, dev, id }; | |
309 | ||
310 | /* Execute driver initialization on node where the device's | |
311 | bus is attached to. This way the driver likely allocates | |
312 | its local memory on the right node without any need to | |
313 | change it. */ | |
314 | node = dev_to_node(&dev->dev); | |
f70316da | 315 | if (node >= 0) { |
873392ca | 316 | int cpu; |
873392ca RR |
317 | |
318 | get_online_cpus(); | |
a70f7302 | 319 | cpu = cpumask_any_and(cpumask_of_node(node), cpu_online_mask); |
873392ca RR |
320 | if (cpu < nr_cpu_ids) |
321 | error = work_on_cpu(cpu, local_pci_probe, &ddi); | |
322 | else | |
323 | error = local_pci_probe(&ddi); | |
324 | put_online_cpus(); | |
325 | } else | |
326 | error = local_pci_probe(&ddi); | |
d42c6997 AK |
327 | return error; |
328 | } | |
329 | ||
1da177e4 | 330 | /** |
23ea3793 | 331 | * __pci_device_probe - check if a driver wants to claim a specific PCI device |
8f7020d3 RD |
332 | * @drv: driver to call to check if it wants the PCI device |
333 | * @pci_dev: PCI device being probed | |
1da177e4 | 334 | * |
8f7020d3 | 335 | * returns 0 on success, else error. |
1da177e4 LT |
336 | * side-effect: pci_dev->driver is set to drv when drv claims pci_dev. |
337 | */ | |
338 | static int | |
339 | __pci_device_probe(struct pci_driver *drv, struct pci_dev *pci_dev) | |
75865858 GKH |
340 | { |
341 | const struct pci_device_id *id; | |
1da177e4 LT |
342 | int error = 0; |
343 | ||
344 | if (!pci_dev->driver && drv->probe) { | |
75865858 GKH |
345 | error = -ENODEV; |
346 | ||
347 | id = pci_match_device(drv, pci_dev); | |
348 | if (id) | |
d42c6997 | 349 | error = pci_call_probe(drv, pci_dev, id); |
75865858 GKH |
350 | if (error >= 0) { |
351 | pci_dev->driver = drv; | |
352 | error = 0; | |
353 | } | |
1da177e4 LT |
354 | } |
355 | return error; | |
356 | } | |
357 | ||
358 | static int pci_device_probe(struct device * dev) | |
359 | { | |
360 | int error = 0; | |
361 | struct pci_driver *drv; | |
362 | struct pci_dev *pci_dev; | |
363 | ||
364 | drv = to_pci_driver(dev->driver); | |
365 | pci_dev = to_pci_dev(dev); | |
366 | pci_dev_get(pci_dev); | |
367 | error = __pci_device_probe(drv, pci_dev); | |
368 | if (error) | |
369 | pci_dev_put(pci_dev); | |
370 | ||
371 | return error; | |
372 | } | |
373 | ||
374 | static int pci_device_remove(struct device * dev) | |
375 | { | |
376 | struct pci_dev * pci_dev = to_pci_dev(dev); | |
377 | struct pci_driver * drv = pci_dev->driver; | |
378 | ||
379 | if (drv) { | |
f3ec4f87 AS |
380 | if (drv->remove) { |
381 | pm_runtime_get_sync(dev); | |
1da177e4 | 382 | drv->remove(pci_dev); |
f3ec4f87 AS |
383 | pm_runtime_put_noidle(dev); |
384 | } | |
1da177e4 LT |
385 | pci_dev->driver = NULL; |
386 | } | |
387 | ||
f3ec4f87 AS |
388 | /* Undo the runtime PM settings in local_pci_probe() */ |
389 | pm_runtime_disable(dev); | |
390 | pm_runtime_set_suspended(dev); | |
391 | pm_runtime_put_noidle(dev); | |
392 | ||
2449e06a SL |
393 | /* |
394 | * If the device is still on, set the power state as "unknown", | |
395 | * since it might change by the next time we load the driver. | |
396 | */ | |
397 | if (pci_dev->current_state == PCI_D0) | |
398 | pci_dev->current_state = PCI_UNKNOWN; | |
399 | ||
1da177e4 LT |
400 | /* |
401 | * We would love to complain here if pci_dev->is_enabled is set, that | |
402 | * the driver should have called pci_disable_device(), but the | |
403 | * unfortunate fact is there are too many odd BIOS and bridge setups | |
404 | * that don't like drivers doing that all of the time. | |
405 | * Oh well, we can dream of sane hardware when we sleep, no matter how | |
406 | * horrible the crap we have to deal with is when we are awake... | |
407 | */ | |
408 | ||
409 | pci_dev_put(pci_dev); | |
410 | return 0; | |
411 | } | |
412 | ||
bbb44d9f RW |
413 | static void pci_device_shutdown(struct device *dev) |
414 | { | |
415 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
416 | struct pci_driver *drv = pci_dev->driver; | |
417 | ||
418 | if (drv && drv->shutdown) | |
419 | drv->shutdown(pci_dev); | |
420 | pci_msi_shutdown(pci_dev); | |
421 | pci_msix_shutdown(pci_dev); | |
5b415f1e | 422 | |
b566a22c KA |
423 | /* |
424 | * Turn off Bus Master bit on the device to tell it to not | |
425 | * continue to do DMA | |
426 | */ | |
427 | pci_disable_device(pci_dev); | |
428 | ||
5b415f1e RW |
429 | /* |
430 | * Devices may be enabled to wake up by runtime PM, but they need not | |
431 | * be supposed to wake up the system from its "power off" state (e.g. | |
432 | * ACPI S5). Therefore disable wakeup for all devices that aren't | |
433 | * supposed to wake up the system at this point. The state argument | |
434 | * will be ignored by pci_enable_wake(). | |
435 | */ | |
436 | if (!device_may_wakeup(dev)) | |
437 | pci_enable_wake(pci_dev, PCI_UNKNOWN, false); | |
bbb44d9f RW |
438 | } |
439 | ||
aa338601 | 440 | #ifdef CONFIG_PM |
6cbf8214 RW |
441 | |
442 | /* Auxiliary functions used for system resume and run-time resume. */ | |
443 | ||
444 | /** | |
445 | * pci_restore_standard_config - restore standard config registers of PCI device | |
446 | * @pci_dev: PCI device to handle | |
447 | */ | |
448 | static int pci_restore_standard_config(struct pci_dev *pci_dev) | |
449 | { | |
450 | pci_update_current_state(pci_dev, PCI_UNKNOWN); | |
451 | ||
452 | if (pci_dev->current_state != PCI_D0) { | |
453 | int error = pci_set_power_state(pci_dev, PCI_D0); | |
454 | if (error) | |
455 | return error; | |
456 | } | |
457 | ||
1d3c16a8 JM |
458 | pci_restore_state(pci_dev); |
459 | return 0; | |
6cbf8214 RW |
460 | } |
461 | ||
462 | static void pci_pm_default_resume_early(struct pci_dev *pci_dev) | |
463 | { | |
464 | pci_restore_standard_config(pci_dev); | |
465 | pci_fixup_device(pci_fixup_resume_early, pci_dev); | |
466 | } | |
467 | ||
468 | #endif | |
469 | ||
bbb44d9f RW |
470 | #ifdef CONFIG_PM_SLEEP |
471 | ||
fa58d305 RW |
472 | /* |
473 | * Default "suspend" method for devices that have no driver provided suspend, | |
474 | * or not even a driver at all (second part). | |
bbb44d9f | 475 | */ |
bb808945 | 476 | static void pci_pm_set_unknown_state(struct pci_dev *pci_dev) |
bbb44d9f | 477 | { |
bbb44d9f RW |
478 | /* |
479 | * mark its power state as "unknown", since we don't know if | |
480 | * e.g. the BIOS will change its device state when we suspend. | |
481 | */ | |
482 | if (pci_dev->current_state == PCI_D0) | |
483 | pci_dev->current_state = PCI_UNKNOWN; | |
484 | } | |
485 | ||
355a72d7 RW |
486 | /* |
487 | * Default "resume" method for devices that have no driver provided resume, | |
488 | * or not even a driver at all (second part). | |
489 | */ | |
bb808945 | 490 | static int pci_pm_reenable_device(struct pci_dev *pci_dev) |
355a72d7 RW |
491 | { |
492 | int retval; | |
493 | ||
bbb44d9f RW |
494 | /* if the device was enabled before suspend, reenable */ |
495 | retval = pci_reenable_device(pci_dev); | |
496 | /* | |
497 | * if the device was busmaster before the suspend, make it busmaster | |
498 | * again | |
499 | */ | |
500 | if (pci_dev->is_busmaster) | |
501 | pci_set_master(pci_dev); | |
502 | ||
503 | return retval; | |
504 | } | |
505 | ||
506 | static int pci_legacy_suspend(struct device *dev, pm_message_t state) | |
1da177e4 LT |
507 | { |
508 | struct pci_dev * pci_dev = to_pci_dev(dev); | |
509 | struct pci_driver * drv = pci_dev->driver; | |
46939f8b | 510 | |
02669492 | 511 | if (drv && drv->suspend) { |
99dadce8 | 512 | pci_power_t prev = pci_dev->current_state; |
46939f8b | 513 | int error; |
aa8c6c93 | 514 | |
57ef8026 FP |
515 | error = drv->suspend(pci_dev, state); |
516 | suspend_report_result(drv->suspend, error); | |
517 | if (error) | |
518 | return error; | |
aa8c6c93 | 519 | |
46939f8b | 520 | if (!pci_dev->state_saved && pci_dev->current_state != PCI_D0 |
99dadce8 RW |
521 | && pci_dev->current_state != PCI_UNKNOWN) { |
522 | WARN_ONCE(pci_dev->current_state != prev, | |
523 | "PCI PM: Device state not saved by %pF\n", | |
524 | drv->suspend); | |
99dadce8 | 525 | } |
02669492 | 526 | } |
ad8cfa1d RW |
527 | |
528 | pci_fixup_device(pci_fixup_suspend, pci_dev); | |
529 | ||
46939f8b | 530 | return 0; |
1da177e4 LT |
531 | } |
532 | ||
bbb44d9f | 533 | static int pci_legacy_suspend_late(struct device *dev, pm_message_t state) |
cbd69dbb LT |
534 | { |
535 | struct pci_dev * pci_dev = to_pci_dev(dev); | |
536 | struct pci_driver * drv = pci_dev->driver; | |
cbd69dbb LT |
537 | |
538 | if (drv && drv->suspend_late) { | |
46939f8b RW |
539 | pci_power_t prev = pci_dev->current_state; |
540 | int error; | |
541 | ||
57ef8026 FP |
542 | error = drv->suspend_late(pci_dev, state); |
543 | suspend_report_result(drv->suspend_late, error); | |
46939f8b RW |
544 | if (error) |
545 | return error; | |
546 | ||
547 | if (!pci_dev->state_saved && pci_dev->current_state != PCI_D0 | |
548 | && pci_dev->current_state != PCI_UNKNOWN) { | |
549 | WARN_ONCE(pci_dev->current_state != prev, | |
550 | "PCI PM: Device state not saved by %pF\n", | |
551 | drv->suspend_late); | |
552 | return 0; | |
553 | } | |
cbd69dbb | 554 | } |
46939f8b RW |
555 | |
556 | if (!pci_dev->state_saved) | |
557 | pci_save_state(pci_dev); | |
558 | ||
559 | pci_pm_set_unknown_state(pci_dev); | |
560 | ||
561 | return 0; | |
cbd69dbb | 562 | } |
1da177e4 | 563 | |
f6dc1e5e RW |
564 | static int pci_legacy_resume_early(struct device *dev) |
565 | { | |
f6dc1e5e RW |
566 | struct pci_dev * pci_dev = to_pci_dev(dev); |
567 | struct pci_driver * drv = pci_dev->driver; | |
568 | ||
aa8c6c93 RW |
569 | return drv && drv->resume_early ? |
570 | drv->resume_early(pci_dev) : 0; | |
f6dc1e5e RW |
571 | } |
572 | ||
bbb44d9f | 573 | static int pci_legacy_resume(struct device *dev) |
1da177e4 LT |
574 | { |
575 | struct pci_dev * pci_dev = to_pci_dev(dev); | |
576 | struct pci_driver * drv = pci_dev->driver; | |
577 | ||
ad8cfa1d RW |
578 | pci_fixup_device(pci_fixup_resume, pci_dev); |
579 | ||
aa8c6c93 RW |
580 | return drv && drv->resume ? |
581 | drv->resume(pci_dev) : pci_pm_reenable_device(pci_dev); | |
1da177e4 LT |
582 | } |
583 | ||
571ff758 RW |
584 | /* Auxiliary functions used by the new power management framework */ |
585 | ||
5294e256 | 586 | static void pci_pm_default_resume(struct pci_dev *pci_dev) |
571ff758 | 587 | { |
73410429 RW |
588 | pci_fixup_device(pci_fixup_resume, pci_dev); |
589 | ||
5294e256 RW |
590 | if (!pci_is_bridge(pci_dev)) |
591 | pci_enable_wake(pci_dev, PCI_D0, false); | |
571ff758 RW |
592 | } |
593 | ||
5294e256 | 594 | static void pci_pm_default_suspend(struct pci_dev *pci_dev) |
73410429 | 595 | { |
5294e256 | 596 | /* Disable non-bridge devices without PM support */ |
cbbc2f6b RW |
597 | if (!pci_is_bridge(pci_dev)) |
598 | pci_disable_enabled_device(pci_dev); | |
73410429 RW |
599 | } |
600 | ||
07e836e8 RW |
601 | static bool pci_has_legacy_pm_support(struct pci_dev *pci_dev) |
602 | { | |
603 | struct pci_driver *drv = pci_dev->driver; | |
bb808945 | 604 | bool ret = drv && (drv->suspend || drv->suspend_late || drv->resume |
07e836e8 | 605 | || drv->resume_early); |
bb808945 RW |
606 | |
607 | /* | |
608 | * Legacy PM support is used by default, so warn if the new framework is | |
609 | * supported as well. Drivers are supposed to support either the | |
610 | * former, or the latter, but not both at the same time. | |
611 | */ | |
82440a82 DF |
612 | WARN(ret && drv->driver.pm, "driver %s device %04x:%04x\n", |
613 | drv->name, pci_dev->vendor, pci_dev->device); | |
bb808945 RW |
614 | |
615 | return ret; | |
07e836e8 RW |
616 | } |
617 | ||
571ff758 RW |
618 | /* New power management framework */ |
619 | ||
bbb44d9f RW |
620 | static int pci_pm_prepare(struct device *dev) |
621 | { | |
622 | struct device_driver *drv = dev->driver; | |
623 | int error = 0; | |
624 | ||
eea3fc03 RW |
625 | /* |
626 | * If a PCI device configured to wake up the system from sleep states | |
627 | * has been suspended at run time and there's a resume request pending | |
628 | * for it, this is equivalent to the device signaling wakeup, so the | |
629 | * system suspend operation should be aborted. | |
630 | */ | |
631 | pm_runtime_get_noresume(dev); | |
632 | if (pm_runtime_barrier(dev) && device_may_wakeup(dev)) | |
633 | pm_wakeup_event(dev, 0); | |
634 | ||
635 | if (pm_wakeup_pending()) { | |
636 | pm_runtime_put_sync(dev); | |
637 | return -EBUSY; | |
638 | } | |
639 | ||
6cbf8214 RW |
640 | /* |
641 | * PCI devices suspended at run time need to be resumed at this | |
642 | * point, because in general it is necessary to reconfigure them for | |
643 | * system suspend. Namely, if the device is supposed to wake up the | |
644 | * system from the sleep state, we may need to reconfigure it for this | |
645 | * purpose. In turn, if the device is not supposed to wake up the | |
646 | * system from the sleep state, we'll have to prevent it from signaling | |
647 | * wake-up. | |
648 | */ | |
eea3fc03 | 649 | pm_runtime_resume(dev); |
6cbf8214 | 650 | |
bbb44d9f RW |
651 | if (drv && drv->pm && drv->pm->prepare) |
652 | error = drv->pm->prepare(dev); | |
653 | ||
654 | return error; | |
655 | } | |
656 | ||
657 | static void pci_pm_complete(struct device *dev) | |
658 | { | |
659 | struct device_driver *drv = dev->driver; | |
660 | ||
661 | if (drv && drv->pm && drv->pm->complete) | |
662 | drv->pm->complete(dev); | |
a5f76d5e RW |
663 | |
664 | pm_runtime_put_sync(dev); | |
bbb44d9f RW |
665 | } |
666 | ||
6cbf8214 RW |
667 | #else /* !CONFIG_PM_SLEEP */ |
668 | ||
669 | #define pci_pm_prepare NULL | |
670 | #define pci_pm_complete NULL | |
671 | ||
672 | #endif /* !CONFIG_PM_SLEEP */ | |
673 | ||
bbb44d9f RW |
674 | #ifdef CONFIG_SUSPEND |
675 | ||
676 | static int pci_pm_suspend(struct device *dev) | |
677 | { | |
678 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
8150f32b | 679 | const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; |
bbb44d9f | 680 | |
ad8cfa1d RW |
681 | if (pci_has_legacy_pm_support(pci_dev)) |
682 | return pci_legacy_suspend(dev, PMSG_SUSPEND); | |
bb808945 | 683 | |
5294e256 RW |
684 | if (!pm) { |
685 | pci_pm_default_suspend(pci_dev); | |
686 | goto Fixup; | |
687 | } | |
688 | ||
5294e256 RW |
689 | if (pm->suspend) { |
690 | pci_power_t prev = pci_dev->current_state; | |
691 | int error; | |
692 | ||
ddb7c9d2 RW |
693 | error = pm->suspend(dev); |
694 | suspend_report_result(pm->suspend, error); | |
5294e256 RW |
695 | if (error) |
696 | return error; | |
697 | ||
46939f8b | 698 | if (!pci_dev->state_saved && pci_dev->current_state != PCI_D0 |
5294e256 RW |
699 | && pci_dev->current_state != PCI_UNKNOWN) { |
700 | WARN_ONCE(pci_dev->current_state != prev, | |
701 | "PCI PM: State of device not saved by %pF\n", | |
702 | pm->suspend); | |
5294e256 | 703 | } |
bbb44d9f | 704 | } |
fa58d305 | 705 | |
5294e256 RW |
706 | Fixup: |
707 | pci_fixup_device(pci_fixup_suspend, pci_dev); | |
708 | ||
709 | return 0; | |
bbb44d9f RW |
710 | } |
711 | ||
712 | static int pci_pm_suspend_noirq(struct device *dev) | |
c8958177 | 713 | { |
355a72d7 | 714 | struct pci_dev *pci_dev = to_pci_dev(dev); |
8150f32b | 715 | const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; |
c8958177 | 716 | |
bb808945 RW |
717 | if (pci_has_legacy_pm_support(pci_dev)) |
718 | return pci_legacy_suspend_late(dev, PMSG_SUSPEND); | |
719 | ||
931ff68a RW |
720 | if (!pm) { |
721 | pci_save_state(pci_dev); | |
46939f8b | 722 | return 0; |
931ff68a | 723 | } |
46939f8b RW |
724 | |
725 | if (pm->suspend_noirq) { | |
726 | pci_power_t prev = pci_dev->current_state; | |
727 | int error; | |
728 | ||
729 | error = pm->suspend_noirq(dev); | |
730 | suspend_report_result(pm->suspend_noirq, error); | |
731 | if (error) | |
732 | return error; | |
733 | ||
734 | if (!pci_dev->state_saved && pci_dev->current_state != PCI_D0 | |
735 | && pci_dev->current_state != PCI_UNKNOWN) { | |
736 | WARN_ONCE(pci_dev->current_state != prev, | |
737 | "PCI PM: State of device not saved by %pF\n", | |
738 | pm->suspend_noirq); | |
739 | return 0; | |
740 | } | |
bbb44d9f RW |
741 | } |
742 | ||
46939f8b RW |
743 | if (!pci_dev->state_saved) { |
744 | pci_save_state(pci_dev); | |
745 | if (!pci_is_bridge(pci_dev)) | |
746 | pci_prepare_to_sleep(pci_dev); | |
747 | } | |
d67e37d7 | 748 | |
46939f8b RW |
749 | pci_pm_set_unknown_state(pci_dev); |
750 | ||
751 | return 0; | |
c8958177 | 752 | } |
1da177e4 | 753 | |
f6dc1e5e | 754 | static int pci_pm_resume_noirq(struct device *dev) |
bbb44d9f RW |
755 | { |
756 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
757 | struct device_driver *drv = dev->driver; | |
355a72d7 | 758 | int error = 0; |
bbb44d9f | 759 | |
6cbf8214 | 760 | pci_pm_default_resume_early(pci_dev); |
aa8c6c93 | 761 | |
ad8cfa1d | 762 | if (pci_has_legacy_pm_support(pci_dev)) |
f6dc1e5e | 763 | return pci_legacy_resume_early(dev); |
bb808945 | 764 | |
f6dc1e5e RW |
765 | if (drv && drv->pm && drv->pm->resume_noirq) |
766 | error = drv->pm->resume_noirq(dev); | |
bbb44d9f RW |
767 | |
768 | return error; | |
769 | } | |
770 | ||
f6dc1e5e | 771 | static int pci_pm_resume(struct device *dev) |
bbb44d9f | 772 | { |
355a72d7 | 773 | struct pci_dev *pci_dev = to_pci_dev(dev); |
8150f32b | 774 | const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; |
bbb44d9f RW |
775 | int error = 0; |
776 | ||
418e4da3 RW |
777 | /* |
778 | * This is necessary for the suspend error path in which resume is | |
779 | * called without restoring the standard config registers of the device. | |
780 | */ | |
781 | if (pci_dev->state_saved) | |
782 | pci_restore_standard_config(pci_dev); | |
783 | ||
ad8cfa1d | 784 | if (pci_has_legacy_pm_support(pci_dev)) |
f6dc1e5e | 785 | return pci_legacy_resume(dev); |
bb808945 | 786 | |
5294e256 | 787 | pci_pm_default_resume(pci_dev); |
73410429 | 788 | |
5294e256 RW |
789 | if (pm) { |
790 | if (pm->resume) | |
791 | error = pm->resume(dev); | |
792 | } else { | |
793 | pci_pm_reenable_device(pci_dev); | |
794 | } | |
bbb44d9f | 795 | |
999cce4a | 796 | return error; |
bbb44d9f RW |
797 | } |
798 | ||
799 | #else /* !CONFIG_SUSPEND */ | |
800 | ||
801 | #define pci_pm_suspend NULL | |
802 | #define pci_pm_suspend_noirq NULL | |
803 | #define pci_pm_resume NULL | |
804 | #define pci_pm_resume_noirq NULL | |
805 | ||
806 | #endif /* !CONFIG_SUSPEND */ | |
807 | ||
1f112cee | 808 | #ifdef CONFIG_HIBERNATE_CALLBACKS |
bbb44d9f RW |
809 | |
810 | static int pci_pm_freeze(struct device *dev) | |
811 | { | |
812 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
8150f32b | 813 | const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; |
bbb44d9f | 814 | |
ad8cfa1d RW |
815 | if (pci_has_legacy_pm_support(pci_dev)) |
816 | return pci_legacy_suspend(dev, PMSG_FREEZE); | |
bb808945 | 817 | |
5294e256 RW |
818 | if (!pm) { |
819 | pci_pm_default_suspend(pci_dev); | |
820 | return 0; | |
bbb44d9f RW |
821 | } |
822 | ||
5294e256 RW |
823 | if (pm->freeze) { |
824 | int error; | |
825 | ||
826 | error = pm->freeze(dev); | |
827 | suspend_report_result(pm->freeze, error); | |
828 | if (error) | |
829 | return error; | |
830 | } | |
831 | ||
5294e256 | 832 | return 0; |
bbb44d9f RW |
833 | } |
834 | ||
835 | static int pci_pm_freeze_noirq(struct device *dev) | |
836 | { | |
355a72d7 | 837 | struct pci_dev *pci_dev = to_pci_dev(dev); |
adf09493 | 838 | struct device_driver *drv = dev->driver; |
bbb44d9f | 839 | |
bb808945 RW |
840 | if (pci_has_legacy_pm_support(pci_dev)) |
841 | return pci_legacy_suspend_late(dev, PMSG_FREEZE); | |
842 | ||
d67e37d7 | 843 | if (drv && drv->pm && drv->pm->freeze_noirq) { |
46939f8b RW |
844 | int error; |
845 | ||
d67e37d7 RW |
846 | error = drv->pm->freeze_noirq(dev); |
847 | suspend_report_result(drv->pm->freeze_noirq, error); | |
46939f8b RW |
848 | if (error) |
849 | return error; | |
bbb44d9f RW |
850 | } |
851 | ||
46939f8b RW |
852 | if (!pci_dev->state_saved) |
853 | pci_save_state(pci_dev); | |
d67e37d7 | 854 | |
46939f8b RW |
855 | pci_pm_set_unknown_state(pci_dev); |
856 | ||
857 | return 0; | |
bbb44d9f RW |
858 | } |
859 | ||
f6dc1e5e | 860 | static int pci_pm_thaw_noirq(struct device *dev) |
bbb44d9f | 861 | { |
355a72d7 | 862 | struct pci_dev *pci_dev = to_pci_dev(dev); |
bbb44d9f RW |
863 | struct device_driver *drv = dev->driver; |
864 | int error = 0; | |
865 | ||
ad8cfa1d | 866 | if (pci_has_legacy_pm_support(pci_dev)) |
f6dc1e5e | 867 | return pci_legacy_resume_early(dev); |
bb808945 | 868 | |
f6dc1e5e | 869 | pci_update_current_state(pci_dev, PCI_D0); |
d67e37d7 | 870 | |
f6dc1e5e RW |
871 | if (drv && drv->pm && drv->pm->thaw_noirq) |
872 | error = drv->pm->thaw_noirq(dev); | |
bbb44d9f RW |
873 | |
874 | return error; | |
875 | } | |
876 | ||
f6dc1e5e | 877 | static int pci_pm_thaw(struct device *dev) |
bbb44d9f | 878 | { |
355a72d7 | 879 | struct pci_dev *pci_dev = to_pci_dev(dev); |
8150f32b | 880 | const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; |
bbb44d9f RW |
881 | int error = 0; |
882 | ||
ad8cfa1d | 883 | if (pci_has_legacy_pm_support(pci_dev)) |
f6dc1e5e | 884 | return pci_legacy_resume(dev); |
bb808945 | 885 | |
5294e256 RW |
886 | if (pm) { |
887 | if (pm->thaw) | |
888 | error = pm->thaw(dev); | |
889 | } else { | |
890 | pci_pm_reenable_device(pci_dev); | |
891 | } | |
bbb44d9f | 892 | |
4b77b0a2 RW |
893 | pci_dev->state_saved = false; |
894 | ||
bbb44d9f RW |
895 | return error; |
896 | } | |
897 | ||
898 | static int pci_pm_poweroff(struct device *dev) | |
899 | { | |
355a72d7 | 900 | struct pci_dev *pci_dev = to_pci_dev(dev); |
8150f32b | 901 | const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; |
bbb44d9f | 902 | |
ad8cfa1d RW |
903 | if (pci_has_legacy_pm_support(pci_dev)) |
904 | return pci_legacy_suspend(dev, PMSG_HIBERNATE); | |
bb808945 | 905 | |
5294e256 RW |
906 | if (!pm) { |
907 | pci_pm_default_suspend(pci_dev); | |
908 | goto Fixup; | |
909 | } | |
910 | ||
5294e256 | 911 | if (pm->poweroff) { |
46939f8b RW |
912 | int error; |
913 | ||
ddb7c9d2 RW |
914 | error = pm->poweroff(dev); |
915 | suspend_report_result(pm->poweroff, error); | |
46939f8b RW |
916 | if (error) |
917 | return error; | |
bbb44d9f RW |
918 | } |
919 | ||
5294e256 RW |
920 | Fixup: |
921 | pci_fixup_device(pci_fixup_suspend, pci_dev); | |
c9b9972b | 922 | |
46939f8b | 923 | return 0; |
bbb44d9f RW |
924 | } |
925 | ||
926 | static int pci_pm_poweroff_noirq(struct device *dev) | |
927 | { | |
46939f8b | 928 | struct pci_dev *pci_dev = to_pci_dev(dev); |
adf09493 | 929 | struct device_driver *drv = dev->driver; |
bbb44d9f | 930 | |
bb808945 RW |
931 | if (pci_has_legacy_pm_support(to_pci_dev(dev))) |
932 | return pci_legacy_suspend_late(dev, PMSG_HIBERNATE); | |
933 | ||
46939f8b RW |
934 | if (!drv || !drv->pm) |
935 | return 0; | |
936 | ||
937 | if (drv->pm->poweroff_noirq) { | |
938 | int error; | |
939 | ||
d67e37d7 RW |
940 | error = drv->pm->poweroff_noirq(dev); |
941 | suspend_report_result(drv->pm->poweroff_noirq, error); | |
46939f8b RW |
942 | if (error) |
943 | return error; | |
bbb44d9f RW |
944 | } |
945 | ||
46939f8b RW |
946 | if (!pci_dev->state_saved && !pci_is_bridge(pci_dev)) |
947 | pci_prepare_to_sleep(pci_dev); | |
948 | ||
949 | return 0; | |
bbb44d9f RW |
950 | } |
951 | ||
f6dc1e5e | 952 | static int pci_pm_restore_noirq(struct device *dev) |
bbb44d9f RW |
953 | { |
954 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
955 | struct device_driver *drv = dev->driver; | |
355a72d7 | 956 | int error = 0; |
bbb44d9f | 957 | |
6cbf8214 | 958 | pci_pm_default_resume_early(pci_dev); |
aa8c6c93 | 959 | |
ad8cfa1d | 960 | if (pci_has_legacy_pm_support(pci_dev)) |
f6dc1e5e | 961 | return pci_legacy_resume_early(dev); |
bb808945 | 962 | |
f6dc1e5e RW |
963 | if (drv && drv->pm && drv->pm->restore_noirq) |
964 | error = drv->pm->restore_noirq(dev); | |
bbb44d9f RW |
965 | |
966 | return error; | |
967 | } | |
968 | ||
f6dc1e5e | 969 | static int pci_pm_restore(struct device *dev) |
bbb44d9f RW |
970 | { |
971 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
8150f32b | 972 | const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; |
bbb44d9f RW |
973 | int error = 0; |
974 | ||
418e4da3 RW |
975 | /* |
976 | * This is necessary for the hibernation error path in which restore is | |
977 | * called without restoring the standard config registers of the device. | |
978 | */ | |
979 | if (pci_dev->state_saved) | |
980 | pci_restore_standard_config(pci_dev); | |
981 | ||
ad8cfa1d | 982 | if (pci_has_legacy_pm_support(pci_dev)) |
f6dc1e5e | 983 | return pci_legacy_resume(dev); |
bb808945 | 984 | |
5294e256 | 985 | pci_pm_default_resume(pci_dev); |
73410429 | 986 | |
5294e256 RW |
987 | if (pm) { |
988 | if (pm->restore) | |
989 | error = pm->restore(dev); | |
990 | } else { | |
991 | pci_pm_reenable_device(pci_dev); | |
992 | } | |
bbb44d9f RW |
993 | |
994 | return error; | |
c8958177 | 995 | } |
1da177e4 | 996 | |
1f112cee | 997 | #else /* !CONFIG_HIBERNATE_CALLBACKS */ |
bbb44d9f RW |
998 | |
999 | #define pci_pm_freeze NULL | |
1000 | #define pci_pm_freeze_noirq NULL | |
1001 | #define pci_pm_thaw NULL | |
1002 | #define pci_pm_thaw_noirq NULL | |
1003 | #define pci_pm_poweroff NULL | |
1004 | #define pci_pm_poweroff_noirq NULL | |
1005 | #define pci_pm_restore NULL | |
1006 | #define pci_pm_restore_noirq NULL | |
1007 | ||
1f112cee | 1008 | #endif /* !CONFIG_HIBERNATE_CALLBACKS */ |
bbb44d9f | 1009 | |
6cbf8214 RW |
1010 | #ifdef CONFIG_PM_RUNTIME |
1011 | ||
1012 | static int pci_pm_runtime_suspend(struct device *dev) | |
1013 | { | |
1014 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
1015 | const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; | |
1016 | pci_power_t prev = pci_dev->current_state; | |
1017 | int error; | |
1018 | ||
1019 | if (!pm || !pm->runtime_suspend) | |
1020 | return -ENOSYS; | |
1021 | ||
1022 | error = pm->runtime_suspend(dev); | |
1023 | suspend_report_result(pm->runtime_suspend, error); | |
1024 | if (error) | |
1025 | return error; | |
1026 | ||
1027 | pci_fixup_device(pci_fixup_suspend, pci_dev); | |
1028 | ||
1029 | if (!pci_dev->state_saved && pci_dev->current_state != PCI_D0 | |
1030 | && pci_dev->current_state != PCI_UNKNOWN) { | |
1031 | WARN_ONCE(pci_dev->current_state != prev, | |
1032 | "PCI PM: State of device not saved by %pF\n", | |
1033 | pm->runtime_suspend); | |
1034 | return 0; | |
1035 | } | |
1036 | ||
1037 | if (!pci_dev->state_saved) | |
1038 | pci_save_state(pci_dev); | |
1039 | ||
1040 | pci_finish_runtime_suspend(pci_dev); | |
1041 | ||
1042 | return 0; | |
1043 | } | |
1044 | ||
1045 | static int pci_pm_runtime_resume(struct device *dev) | |
1046 | { | |
1047 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
1048 | const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; | |
1049 | ||
1050 | if (!pm || !pm->runtime_resume) | |
1051 | return -ENOSYS; | |
1052 | ||
1053 | pci_pm_default_resume_early(pci_dev); | |
1054 | __pci_enable_wake(pci_dev, PCI_D0, true, false); | |
1055 | pci_fixup_device(pci_fixup_resume, pci_dev); | |
1056 | ||
1057 | return pm->runtime_resume(dev); | |
1058 | } | |
1059 | ||
1060 | static int pci_pm_runtime_idle(struct device *dev) | |
1061 | { | |
1062 | const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; | |
1063 | ||
1064 | if (!pm) | |
1065 | return -ENOSYS; | |
1066 | ||
1067 | if (pm->runtime_idle) { | |
1068 | int ret = pm->runtime_idle(dev); | |
1069 | if (ret) | |
1070 | return ret; | |
1071 | } | |
1072 | ||
1073 | pm_runtime_suspend(dev); | |
1074 | ||
1075 | return 0; | |
1076 | } | |
1077 | ||
1078 | #else /* !CONFIG_PM_RUNTIME */ | |
1079 | ||
1080 | #define pci_pm_runtime_suspend NULL | |
1081 | #define pci_pm_runtime_resume NULL | |
1082 | #define pci_pm_runtime_idle NULL | |
1083 | ||
1084 | #endif /* !CONFIG_PM_RUNTIME */ | |
1085 | ||
aa338601 | 1086 | #ifdef CONFIG_PM |
6cbf8214 | 1087 | |
8150f32b | 1088 | const struct dev_pm_ops pci_dev_pm_ops = { |
adf09493 RW |
1089 | .prepare = pci_pm_prepare, |
1090 | .complete = pci_pm_complete, | |
1091 | .suspend = pci_pm_suspend, | |
1092 | .resume = pci_pm_resume, | |
1093 | .freeze = pci_pm_freeze, | |
1094 | .thaw = pci_pm_thaw, | |
1095 | .poweroff = pci_pm_poweroff, | |
1096 | .restore = pci_pm_restore, | |
bbb44d9f RW |
1097 | .suspend_noirq = pci_pm_suspend_noirq, |
1098 | .resume_noirq = pci_pm_resume_noirq, | |
1099 | .freeze_noirq = pci_pm_freeze_noirq, | |
1100 | .thaw_noirq = pci_pm_thaw_noirq, | |
1101 | .poweroff_noirq = pci_pm_poweroff_noirq, | |
1102 | .restore_noirq = pci_pm_restore_noirq, | |
6cbf8214 RW |
1103 | .runtime_suspend = pci_pm_runtime_suspend, |
1104 | .runtime_resume = pci_pm_runtime_resume, | |
1105 | .runtime_idle = pci_pm_runtime_idle, | |
bbb44d9f RW |
1106 | }; |
1107 | ||
adf09493 | 1108 | #define PCI_PM_OPS_PTR (&pci_dev_pm_ops) |
bbb44d9f | 1109 | |
6cbf8214 | 1110 | #else /* !COMFIG_PM_OPS */ |
bbb44d9f RW |
1111 | |
1112 | #define PCI_PM_OPS_PTR NULL | |
1113 | ||
6cbf8214 | 1114 | #endif /* !COMFIG_PM_OPS */ |
bbb44d9f | 1115 | |
1da177e4 | 1116 | /** |
863b18f4 | 1117 | * __pci_register_driver - register a new pci driver |
1da177e4 | 1118 | * @drv: the driver structure to register |
863b18f4 | 1119 | * @owner: owner module of drv |
f95d882d | 1120 | * @mod_name: module name string |
1da177e4 LT |
1121 | * |
1122 | * Adds the driver structure to the list of registered drivers. | |
1123 | * Returns a negative value on error, otherwise 0. | |
eaae4b3a | 1124 | * If no error occurred, the driver remains registered even if |
1da177e4 LT |
1125 | * no device was claimed during registration. |
1126 | */ | |
725522b5 GKH |
1127 | int __pci_register_driver(struct pci_driver *drv, struct module *owner, |
1128 | const char *mod_name) | |
1da177e4 LT |
1129 | { |
1130 | int error; | |
1131 | ||
1132 | /* initialize common driver fields */ | |
1133 | drv->driver.name = drv->name; | |
1134 | drv->driver.bus = &pci_bus_type; | |
863b18f4 | 1135 | drv->driver.owner = owner; |
725522b5 | 1136 | drv->driver.mod_name = mod_name; |
50b00755 | 1137 | |
75865858 GKH |
1138 | spin_lock_init(&drv->dynids.lock); |
1139 | INIT_LIST_HEAD(&drv->dynids.list); | |
1da177e4 LT |
1140 | |
1141 | /* register with core */ | |
1142 | error = driver_register(&drv->driver); | |
50bf14b3 | 1143 | if (error) |
0994375e | 1144 | goto out; |
1da177e4 | 1145 | |
ed283e9f | 1146 | error = pci_create_newid_files(drv); |
50bf14b3 | 1147 | if (error) |
0994375e | 1148 | goto out_newid; |
0994375e | 1149 | out: |
1da177e4 | 1150 | return error; |
0994375e | 1151 | |
0994375e CW |
1152 | out_newid: |
1153 | driver_unregister(&drv->driver); | |
1154 | goto out; | |
1da177e4 LT |
1155 | } |
1156 | ||
1157 | /** | |
1158 | * pci_unregister_driver - unregister a pci driver | |
1159 | * @drv: the driver structure to unregister | |
1160 | * | |
1161 | * Deletes the driver structure from the list of registered PCI drivers, | |
1162 | * gives it a chance to clean up by calling its remove() function for | |
1163 | * each device it was responsible for, and marks those devices as | |
1164 | * driverless. | |
1165 | */ | |
1166 | ||
1167 | void | |
1168 | pci_unregister_driver(struct pci_driver *drv) | |
1169 | { | |
ed283e9f | 1170 | pci_remove_newid_files(drv); |
1da177e4 LT |
1171 | driver_unregister(&drv->driver); |
1172 | pci_free_dynids(drv); | |
1173 | } | |
1174 | ||
1175 | static struct pci_driver pci_compat_driver = { | |
1176 | .name = "compat" | |
1177 | }; | |
1178 | ||
1179 | /** | |
1180 | * pci_dev_driver - get the pci_driver of a device | |
1181 | * @dev: the device to query | |
1182 | * | |
1183 | * Returns the appropriate pci_driver structure or %NULL if there is no | |
1184 | * registered driver for the device. | |
1185 | */ | |
1186 | struct pci_driver * | |
1187 | pci_dev_driver(const struct pci_dev *dev) | |
1188 | { | |
1189 | if (dev->driver) | |
1190 | return dev->driver; | |
1191 | else { | |
1192 | int i; | |
1193 | for(i=0; i<=PCI_ROM_RESOURCE; i++) | |
1194 | if (dev->resource[i].flags & IORESOURCE_BUSY) | |
1195 | return &pci_compat_driver; | |
1196 | } | |
1197 | return NULL; | |
1198 | } | |
1199 | ||
1200 | /** | |
1201 | * pci_bus_match - Tell if a PCI device structure has a matching PCI device id structure | |
1da177e4 | 1202 | * @dev: the PCI device structure to match against |
8f7020d3 | 1203 | * @drv: the device driver to search for matching PCI device id structures |
1da177e4 LT |
1204 | * |
1205 | * Used by a driver to check whether a PCI device present in the | |
8f7020d3 | 1206 | * system is in its list of supported devices. Returns the matching |
1da177e4 LT |
1207 | * pci_device_id structure or %NULL if there is no match. |
1208 | */ | |
75865858 | 1209 | static int pci_bus_match(struct device *dev, struct device_driver *drv) |
1da177e4 | 1210 | { |
75865858 GKH |
1211 | struct pci_dev *pci_dev = to_pci_dev(dev); |
1212 | struct pci_driver *pci_drv = to_pci_driver(drv); | |
1da177e4 LT |
1213 | const struct pci_device_id *found_id; |
1214 | ||
75865858 | 1215 | found_id = pci_match_device(pci_drv, pci_dev); |
1da177e4 LT |
1216 | if (found_id) |
1217 | return 1; | |
1218 | ||
75865858 | 1219 | return 0; |
1da177e4 LT |
1220 | } |
1221 | ||
1222 | /** | |
1223 | * pci_dev_get - increments the reference count of the pci device structure | |
1224 | * @dev: the device being referenced | |
1225 | * | |
1226 | * Each live reference to a device should be refcounted. | |
1227 | * | |
1228 | * Drivers for PCI devices should normally record such references in | |
1229 | * their probe() methods, when they bind to a device, and release | |
1230 | * them by calling pci_dev_put(), in their disconnect() methods. | |
1231 | * | |
1232 | * A pointer to the device with the incremented reference counter is returned. | |
1233 | */ | |
1234 | struct pci_dev *pci_dev_get(struct pci_dev *dev) | |
1235 | { | |
1236 | if (dev) | |
1237 | get_device(&dev->dev); | |
1238 | return dev; | |
1239 | } | |
1240 | ||
1241 | /** | |
1242 | * pci_dev_put - release a use of the pci device structure | |
1243 | * @dev: device that's been disconnected | |
1244 | * | |
1245 | * Must be called when a user of a device is finished with it. When the last | |
1246 | * user of the device calls this function, the memory of the device is freed. | |
1247 | */ | |
1248 | void pci_dev_put(struct pci_dev *dev) | |
1249 | { | |
1250 | if (dev) | |
1251 | put_device(&dev->dev); | |
1252 | } | |
1253 | ||
1254 | #ifndef CONFIG_HOTPLUG | |
7eff2e7a | 1255 | int pci_uevent(struct device *dev, struct kobj_uevent_env *env) |
1da177e4 LT |
1256 | { |
1257 | return -ENODEV; | |
1258 | } | |
1259 | #endif | |
1260 | ||
1261 | struct bus_type pci_bus_type = { | |
1262 | .name = "pci", | |
1263 | .match = pci_bus_match, | |
312c004d | 1264 | .uevent = pci_uevent, |
b15d686a RK |
1265 | .probe = pci_device_probe, |
1266 | .remove = pci_device_remove, | |
cbd69dbb | 1267 | .shutdown = pci_device_shutdown, |
1da177e4 | 1268 | .dev_attrs = pci_dev_attrs, |
705b1aaa | 1269 | .bus_attrs = pci_bus_attrs, |
bbb44d9f | 1270 | .pm = PCI_PM_OPS_PTR, |
1da177e4 LT |
1271 | }; |
1272 | ||
1273 | static int __init pci_driver_init(void) | |
1274 | { | |
1275 | return bus_register(&pci_bus_type); | |
1276 | } | |
1277 | ||
1278 | postcore_initcall(pci_driver_init); | |
1279 | ||
9dba910e | 1280 | EXPORT_SYMBOL_GPL(pci_add_dynid); |
75865858 | 1281 | EXPORT_SYMBOL(pci_match_id); |
863b18f4 | 1282 | EXPORT_SYMBOL(__pci_register_driver); |
1da177e4 LT |
1283 | EXPORT_SYMBOL(pci_unregister_driver); |
1284 | EXPORT_SYMBOL(pci_dev_driver); | |
1285 | EXPORT_SYMBOL(pci_bus_type); | |
1286 | EXPORT_SYMBOL(pci_dev_get); | |
1287 | EXPORT_SYMBOL(pci_dev_put); |