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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 | 282 | struct device *dev = &ddi->dev->dev; |
ea8c88f1 | 283 | struct device *parent = dev->parent; |
f3ec4f87 AS |
284 | int rc; |
285 | ||
ea8c88f1 HY |
286 | /* The parent bridge must be in active state when probing */ |
287 | if (parent) | |
288 | pm_runtime_get_sync(parent); | |
f3ec4f87 AS |
289 | /* Unbound PCI devices are always set to disabled and suspended. |
290 | * During probe, the device is set to enabled and active and the | |
291 | * usage count is incremented. If the driver supports runtime PM, | |
292 | * it should call pm_runtime_put_noidle() in its probe routine and | |
293 | * pm_runtime_get_noresume() in its remove routine. | |
294 | */ | |
295 | pm_runtime_get_noresume(dev); | |
296 | pm_runtime_set_active(dev); | |
297 | pm_runtime_enable(dev); | |
298 | ||
299 | rc = ddi->drv->probe(ddi->dev, ddi->id); | |
300 | if (rc) { | |
301 | pm_runtime_disable(dev); | |
302 | pm_runtime_set_suspended(dev); | |
303 | pm_runtime_put_noidle(dev); | |
304 | } | |
ea8c88f1 HY |
305 | if (parent) |
306 | pm_runtime_put(parent); | |
f3ec4f87 | 307 | return rc; |
873392ca RR |
308 | } |
309 | ||
d42c6997 AK |
310 | static int pci_call_probe(struct pci_driver *drv, struct pci_dev *dev, |
311 | const struct pci_device_id *id) | |
312 | { | |
873392ca RR |
313 | int error, node; |
314 | struct drv_dev_and_id ddi = { drv, dev, id }; | |
315 | ||
316 | /* Execute driver initialization on node where the device's | |
317 | bus is attached to. This way the driver likely allocates | |
318 | its local memory on the right node without any need to | |
319 | change it. */ | |
320 | node = dev_to_node(&dev->dev); | |
f70316da | 321 | if (node >= 0) { |
873392ca | 322 | int cpu; |
873392ca RR |
323 | |
324 | get_online_cpus(); | |
a70f7302 | 325 | cpu = cpumask_any_and(cpumask_of_node(node), cpu_online_mask); |
873392ca RR |
326 | if (cpu < nr_cpu_ids) |
327 | error = work_on_cpu(cpu, local_pci_probe, &ddi); | |
328 | else | |
329 | error = local_pci_probe(&ddi); | |
330 | put_online_cpus(); | |
331 | } else | |
332 | error = local_pci_probe(&ddi); | |
d42c6997 AK |
333 | return error; |
334 | } | |
335 | ||
1da177e4 | 336 | /** |
23ea3793 | 337 | * __pci_device_probe - check if a driver wants to claim a specific PCI device |
8f7020d3 RD |
338 | * @drv: driver to call to check if it wants the PCI device |
339 | * @pci_dev: PCI device being probed | |
1da177e4 | 340 | * |
8f7020d3 | 341 | * returns 0 on success, else error. |
1da177e4 LT |
342 | * side-effect: pci_dev->driver is set to drv when drv claims pci_dev. |
343 | */ | |
344 | static int | |
345 | __pci_device_probe(struct pci_driver *drv, struct pci_dev *pci_dev) | |
75865858 GKH |
346 | { |
347 | const struct pci_device_id *id; | |
1da177e4 LT |
348 | int error = 0; |
349 | ||
350 | if (!pci_dev->driver && drv->probe) { | |
75865858 GKH |
351 | error = -ENODEV; |
352 | ||
353 | id = pci_match_device(drv, pci_dev); | |
354 | if (id) | |
d42c6997 | 355 | error = pci_call_probe(drv, pci_dev, id); |
75865858 GKH |
356 | if (error >= 0) { |
357 | pci_dev->driver = drv; | |
358 | error = 0; | |
359 | } | |
1da177e4 LT |
360 | } |
361 | return error; | |
362 | } | |
363 | ||
364 | static int pci_device_probe(struct device * dev) | |
365 | { | |
366 | int error = 0; | |
367 | struct pci_driver *drv; | |
368 | struct pci_dev *pci_dev; | |
369 | ||
370 | drv = to_pci_driver(dev->driver); | |
371 | pci_dev = to_pci_dev(dev); | |
372 | pci_dev_get(pci_dev); | |
373 | error = __pci_device_probe(drv, pci_dev); | |
374 | if (error) | |
375 | pci_dev_put(pci_dev); | |
376 | ||
377 | return error; | |
378 | } | |
379 | ||
380 | static int pci_device_remove(struct device * dev) | |
381 | { | |
382 | struct pci_dev * pci_dev = to_pci_dev(dev); | |
383 | struct pci_driver * drv = pci_dev->driver; | |
384 | ||
385 | if (drv) { | |
f3ec4f87 AS |
386 | if (drv->remove) { |
387 | pm_runtime_get_sync(dev); | |
1da177e4 | 388 | drv->remove(pci_dev); |
f3ec4f87 AS |
389 | pm_runtime_put_noidle(dev); |
390 | } | |
1da177e4 LT |
391 | pci_dev->driver = NULL; |
392 | } | |
393 | ||
f3ec4f87 AS |
394 | /* Undo the runtime PM settings in local_pci_probe() */ |
395 | pm_runtime_disable(dev); | |
396 | pm_runtime_set_suspended(dev); | |
397 | pm_runtime_put_noidle(dev); | |
398 | ||
2449e06a SL |
399 | /* |
400 | * If the device is still on, set the power state as "unknown", | |
401 | * since it might change by the next time we load the driver. | |
402 | */ | |
403 | if (pci_dev->current_state == PCI_D0) | |
404 | pci_dev->current_state = PCI_UNKNOWN; | |
405 | ||
1da177e4 LT |
406 | /* |
407 | * We would love to complain here if pci_dev->is_enabled is set, that | |
408 | * the driver should have called pci_disable_device(), but the | |
409 | * unfortunate fact is there are too many odd BIOS and bridge setups | |
410 | * that don't like drivers doing that all of the time. | |
411 | * Oh well, we can dream of sane hardware when we sleep, no matter how | |
412 | * horrible the crap we have to deal with is when we are awake... | |
413 | */ | |
414 | ||
415 | pci_dev_put(pci_dev); | |
416 | return 0; | |
417 | } | |
418 | ||
bbb44d9f RW |
419 | static void pci_device_shutdown(struct device *dev) |
420 | { | |
421 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
422 | struct pci_driver *drv = pci_dev->driver; | |
423 | ||
424 | if (drv && drv->shutdown) | |
425 | drv->shutdown(pci_dev); | |
426 | pci_msi_shutdown(pci_dev); | |
427 | pci_msix_shutdown(pci_dev); | |
5b415f1e | 428 | |
b566a22c KA |
429 | /* |
430 | * Turn off Bus Master bit on the device to tell it to not | |
431 | * continue to do DMA | |
432 | */ | |
433 | pci_disable_device(pci_dev); | |
434 | ||
5b415f1e RW |
435 | /* |
436 | * Devices may be enabled to wake up by runtime PM, but they need not | |
437 | * be supposed to wake up the system from its "power off" state (e.g. | |
438 | * ACPI S5). Therefore disable wakeup for all devices that aren't | |
439 | * supposed to wake up the system at this point. The state argument | |
440 | * will be ignored by pci_enable_wake(). | |
441 | */ | |
442 | if (!device_may_wakeup(dev)) | |
443 | pci_enable_wake(pci_dev, PCI_UNKNOWN, false); | |
bbb44d9f RW |
444 | } |
445 | ||
aa338601 | 446 | #ifdef CONFIG_PM |
6cbf8214 RW |
447 | |
448 | /* Auxiliary functions used for system resume and run-time resume. */ | |
449 | ||
450 | /** | |
451 | * pci_restore_standard_config - restore standard config registers of PCI device | |
452 | * @pci_dev: PCI device to handle | |
453 | */ | |
454 | static int pci_restore_standard_config(struct pci_dev *pci_dev) | |
455 | { | |
456 | pci_update_current_state(pci_dev, PCI_UNKNOWN); | |
457 | ||
458 | if (pci_dev->current_state != PCI_D0) { | |
459 | int error = pci_set_power_state(pci_dev, PCI_D0); | |
460 | if (error) | |
461 | return error; | |
462 | } | |
463 | ||
1d3c16a8 JM |
464 | pci_restore_state(pci_dev); |
465 | return 0; | |
6cbf8214 RW |
466 | } |
467 | ||
db288c9c RW |
468 | #endif |
469 | ||
470 | #ifdef CONFIG_PM_SLEEP | |
471 | ||
6cbf8214 RW |
472 | static void pci_pm_default_resume_early(struct pci_dev *pci_dev) |
473 | { | |
db288c9c RW |
474 | pci_power_up(pci_dev); |
475 | pci_restore_state(pci_dev); | |
6cbf8214 RW |
476 | pci_fixup_device(pci_fixup_resume_early, pci_dev); |
477 | } | |
478 | ||
fa58d305 RW |
479 | /* |
480 | * Default "suspend" method for devices that have no driver provided suspend, | |
481 | * or not even a driver at all (second part). | |
bbb44d9f | 482 | */ |
bb808945 | 483 | static void pci_pm_set_unknown_state(struct pci_dev *pci_dev) |
bbb44d9f | 484 | { |
bbb44d9f RW |
485 | /* |
486 | * mark its power state as "unknown", since we don't know if | |
487 | * e.g. the BIOS will change its device state when we suspend. | |
488 | */ | |
489 | if (pci_dev->current_state == PCI_D0) | |
490 | pci_dev->current_state = PCI_UNKNOWN; | |
491 | } | |
492 | ||
355a72d7 RW |
493 | /* |
494 | * Default "resume" method for devices that have no driver provided resume, | |
495 | * or not even a driver at all (second part). | |
496 | */ | |
bb808945 | 497 | static int pci_pm_reenable_device(struct pci_dev *pci_dev) |
355a72d7 RW |
498 | { |
499 | int retval; | |
500 | ||
bbb44d9f RW |
501 | /* if the device was enabled before suspend, reenable */ |
502 | retval = pci_reenable_device(pci_dev); | |
503 | /* | |
504 | * if the device was busmaster before the suspend, make it busmaster | |
505 | * again | |
506 | */ | |
507 | if (pci_dev->is_busmaster) | |
508 | pci_set_master(pci_dev); | |
509 | ||
510 | return retval; | |
511 | } | |
512 | ||
513 | static int pci_legacy_suspend(struct device *dev, pm_message_t state) | |
1da177e4 LT |
514 | { |
515 | struct pci_dev * pci_dev = to_pci_dev(dev); | |
516 | struct pci_driver * drv = pci_dev->driver; | |
46939f8b | 517 | |
02669492 | 518 | if (drv && drv->suspend) { |
99dadce8 | 519 | pci_power_t prev = pci_dev->current_state; |
46939f8b | 520 | int error; |
aa8c6c93 | 521 | |
57ef8026 FP |
522 | error = drv->suspend(pci_dev, state); |
523 | suspend_report_result(drv->suspend, error); | |
524 | if (error) | |
525 | return error; | |
aa8c6c93 | 526 | |
46939f8b | 527 | if (!pci_dev->state_saved && pci_dev->current_state != PCI_D0 |
99dadce8 RW |
528 | && pci_dev->current_state != PCI_UNKNOWN) { |
529 | WARN_ONCE(pci_dev->current_state != prev, | |
530 | "PCI PM: Device state not saved by %pF\n", | |
531 | drv->suspend); | |
99dadce8 | 532 | } |
02669492 | 533 | } |
ad8cfa1d RW |
534 | |
535 | pci_fixup_device(pci_fixup_suspend, pci_dev); | |
536 | ||
46939f8b | 537 | return 0; |
1da177e4 LT |
538 | } |
539 | ||
bbb44d9f | 540 | static int pci_legacy_suspend_late(struct device *dev, pm_message_t state) |
cbd69dbb LT |
541 | { |
542 | struct pci_dev * pci_dev = to_pci_dev(dev); | |
543 | struct pci_driver * drv = pci_dev->driver; | |
cbd69dbb LT |
544 | |
545 | if (drv && drv->suspend_late) { | |
46939f8b RW |
546 | pci_power_t prev = pci_dev->current_state; |
547 | int error; | |
548 | ||
57ef8026 FP |
549 | error = drv->suspend_late(pci_dev, state); |
550 | suspend_report_result(drv->suspend_late, error); | |
46939f8b RW |
551 | if (error) |
552 | return error; | |
553 | ||
554 | if (!pci_dev->state_saved && pci_dev->current_state != PCI_D0 | |
555 | && pci_dev->current_state != PCI_UNKNOWN) { | |
556 | WARN_ONCE(pci_dev->current_state != prev, | |
557 | "PCI PM: Device state not saved by %pF\n", | |
558 | drv->suspend_late); | |
559 | return 0; | |
560 | } | |
cbd69dbb | 561 | } |
46939f8b RW |
562 | |
563 | if (!pci_dev->state_saved) | |
564 | pci_save_state(pci_dev); | |
565 | ||
566 | pci_pm_set_unknown_state(pci_dev); | |
567 | ||
568 | return 0; | |
cbd69dbb | 569 | } |
1da177e4 | 570 | |
f6dc1e5e RW |
571 | static int pci_legacy_resume_early(struct device *dev) |
572 | { | |
f6dc1e5e RW |
573 | struct pci_dev * pci_dev = to_pci_dev(dev); |
574 | struct pci_driver * drv = pci_dev->driver; | |
575 | ||
aa8c6c93 RW |
576 | return drv && drv->resume_early ? |
577 | drv->resume_early(pci_dev) : 0; | |
f6dc1e5e RW |
578 | } |
579 | ||
bbb44d9f | 580 | static int pci_legacy_resume(struct device *dev) |
1da177e4 LT |
581 | { |
582 | struct pci_dev * pci_dev = to_pci_dev(dev); | |
583 | struct pci_driver * drv = pci_dev->driver; | |
584 | ||
ad8cfa1d RW |
585 | pci_fixup_device(pci_fixup_resume, pci_dev); |
586 | ||
aa8c6c93 RW |
587 | return drv && drv->resume ? |
588 | drv->resume(pci_dev) : pci_pm_reenable_device(pci_dev); | |
1da177e4 LT |
589 | } |
590 | ||
571ff758 RW |
591 | /* Auxiliary functions used by the new power management framework */ |
592 | ||
5294e256 | 593 | static void pci_pm_default_resume(struct pci_dev *pci_dev) |
571ff758 | 594 | { |
73410429 RW |
595 | pci_fixup_device(pci_fixup_resume, pci_dev); |
596 | ||
5294e256 RW |
597 | if (!pci_is_bridge(pci_dev)) |
598 | pci_enable_wake(pci_dev, PCI_D0, false); | |
571ff758 RW |
599 | } |
600 | ||
5294e256 | 601 | static void pci_pm_default_suspend(struct pci_dev *pci_dev) |
73410429 | 602 | { |
5294e256 | 603 | /* Disable non-bridge devices without PM support */ |
cbbc2f6b RW |
604 | if (!pci_is_bridge(pci_dev)) |
605 | pci_disable_enabled_device(pci_dev); | |
73410429 RW |
606 | } |
607 | ||
07e836e8 RW |
608 | static bool pci_has_legacy_pm_support(struct pci_dev *pci_dev) |
609 | { | |
610 | struct pci_driver *drv = pci_dev->driver; | |
bb808945 | 611 | bool ret = drv && (drv->suspend || drv->suspend_late || drv->resume |
07e836e8 | 612 | || drv->resume_early); |
bb808945 RW |
613 | |
614 | /* | |
615 | * Legacy PM support is used by default, so warn if the new framework is | |
616 | * supported as well. Drivers are supposed to support either the | |
617 | * former, or the latter, but not both at the same time. | |
618 | */ | |
82440a82 DF |
619 | WARN(ret && drv->driver.pm, "driver %s device %04x:%04x\n", |
620 | drv->name, pci_dev->vendor, pci_dev->device); | |
bb808945 RW |
621 | |
622 | return ret; | |
07e836e8 RW |
623 | } |
624 | ||
571ff758 RW |
625 | /* New power management framework */ |
626 | ||
bbb44d9f RW |
627 | static int pci_pm_prepare(struct device *dev) |
628 | { | |
629 | struct device_driver *drv = dev->driver; | |
630 | int error = 0; | |
631 | ||
eea3fc03 RW |
632 | /* |
633 | * If a PCI device configured to wake up the system from sleep states | |
634 | * has been suspended at run time and there's a resume request pending | |
635 | * for it, this is equivalent to the device signaling wakeup, so the | |
636 | * system suspend operation should be aborted. | |
637 | */ | |
638 | pm_runtime_get_noresume(dev); | |
639 | if (pm_runtime_barrier(dev) && device_may_wakeup(dev)) | |
640 | pm_wakeup_event(dev, 0); | |
641 | ||
642 | if (pm_wakeup_pending()) { | |
643 | pm_runtime_put_sync(dev); | |
644 | return -EBUSY; | |
645 | } | |
646 | ||
6cbf8214 RW |
647 | /* |
648 | * PCI devices suspended at run time need to be resumed at this | |
649 | * point, because in general it is necessary to reconfigure them for | |
650 | * system suspend. Namely, if the device is supposed to wake up the | |
651 | * system from the sleep state, we may need to reconfigure it for this | |
652 | * purpose. In turn, if the device is not supposed to wake up the | |
653 | * system from the sleep state, we'll have to prevent it from signaling | |
654 | * wake-up. | |
655 | */ | |
eea3fc03 | 656 | pm_runtime_resume(dev); |
6cbf8214 | 657 | |
bbb44d9f RW |
658 | if (drv && drv->pm && drv->pm->prepare) |
659 | error = drv->pm->prepare(dev); | |
660 | ||
661 | return error; | |
662 | } | |
663 | ||
664 | static void pci_pm_complete(struct device *dev) | |
665 | { | |
666 | struct device_driver *drv = dev->driver; | |
667 | ||
668 | if (drv && drv->pm && drv->pm->complete) | |
669 | drv->pm->complete(dev); | |
a5f76d5e RW |
670 | |
671 | pm_runtime_put_sync(dev); | |
bbb44d9f RW |
672 | } |
673 | ||
6cbf8214 RW |
674 | #else /* !CONFIG_PM_SLEEP */ |
675 | ||
676 | #define pci_pm_prepare NULL | |
677 | #define pci_pm_complete NULL | |
678 | ||
679 | #endif /* !CONFIG_PM_SLEEP */ | |
680 | ||
bbb44d9f RW |
681 | #ifdef CONFIG_SUSPEND |
682 | ||
683 | static int pci_pm_suspend(struct device *dev) | |
684 | { | |
685 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
8150f32b | 686 | const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; |
bbb44d9f | 687 | |
ad8cfa1d RW |
688 | if (pci_has_legacy_pm_support(pci_dev)) |
689 | return pci_legacy_suspend(dev, PMSG_SUSPEND); | |
bb808945 | 690 | |
5294e256 RW |
691 | if (!pm) { |
692 | pci_pm_default_suspend(pci_dev); | |
693 | goto Fixup; | |
694 | } | |
695 | ||
5294e256 RW |
696 | if (pm->suspend) { |
697 | pci_power_t prev = pci_dev->current_state; | |
698 | int error; | |
699 | ||
ddb7c9d2 RW |
700 | error = pm->suspend(dev); |
701 | suspend_report_result(pm->suspend, error); | |
5294e256 RW |
702 | if (error) |
703 | return error; | |
704 | ||
46939f8b | 705 | if (!pci_dev->state_saved && pci_dev->current_state != PCI_D0 |
5294e256 RW |
706 | && pci_dev->current_state != PCI_UNKNOWN) { |
707 | WARN_ONCE(pci_dev->current_state != prev, | |
708 | "PCI PM: State of device not saved by %pF\n", | |
709 | pm->suspend); | |
5294e256 | 710 | } |
bbb44d9f | 711 | } |
fa58d305 | 712 | |
5294e256 RW |
713 | Fixup: |
714 | pci_fixup_device(pci_fixup_suspend, pci_dev); | |
715 | ||
716 | return 0; | |
bbb44d9f RW |
717 | } |
718 | ||
719 | static int pci_pm_suspend_noirq(struct device *dev) | |
c8958177 | 720 | { |
355a72d7 | 721 | struct pci_dev *pci_dev = to_pci_dev(dev); |
8150f32b | 722 | const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; |
c8958177 | 723 | |
bb808945 RW |
724 | if (pci_has_legacy_pm_support(pci_dev)) |
725 | return pci_legacy_suspend_late(dev, PMSG_SUSPEND); | |
726 | ||
931ff68a RW |
727 | if (!pm) { |
728 | pci_save_state(pci_dev); | |
46939f8b | 729 | return 0; |
931ff68a | 730 | } |
46939f8b RW |
731 | |
732 | if (pm->suspend_noirq) { | |
733 | pci_power_t prev = pci_dev->current_state; | |
734 | int error; | |
735 | ||
736 | error = pm->suspend_noirq(dev); | |
737 | suspend_report_result(pm->suspend_noirq, error); | |
738 | if (error) | |
739 | return error; | |
740 | ||
741 | if (!pci_dev->state_saved && pci_dev->current_state != PCI_D0 | |
742 | && pci_dev->current_state != PCI_UNKNOWN) { | |
743 | WARN_ONCE(pci_dev->current_state != prev, | |
744 | "PCI PM: State of device not saved by %pF\n", | |
745 | pm->suspend_noirq); | |
746 | return 0; | |
747 | } | |
bbb44d9f RW |
748 | } |
749 | ||
46939f8b RW |
750 | if (!pci_dev->state_saved) { |
751 | pci_save_state(pci_dev); | |
752 | if (!pci_is_bridge(pci_dev)) | |
753 | pci_prepare_to_sleep(pci_dev); | |
754 | } | |
d67e37d7 | 755 | |
46939f8b RW |
756 | pci_pm_set_unknown_state(pci_dev); |
757 | ||
dbf0e4c7 AS |
758 | /* |
759 | * Some BIOSes from ASUS have a bug: If a USB EHCI host controller's | |
760 | * PCI COMMAND register isn't 0, the BIOS assumes that the controller | |
761 | * hasn't been quiesced and tries to turn it off. If the controller | |
762 | * is already in D3, this can hang or cause memory corruption. | |
763 | * | |
764 | * Since the value of the COMMAND register doesn't matter once the | |
765 | * device has been suspended, we can safely set it to 0 here. | |
766 | */ | |
767 | if (pci_dev->class == PCI_CLASS_SERIAL_USB_EHCI) | |
768 | pci_write_config_word(pci_dev, PCI_COMMAND, 0); | |
769 | ||
46939f8b | 770 | return 0; |
c8958177 | 771 | } |
1da177e4 | 772 | |
f6dc1e5e | 773 | static int pci_pm_resume_noirq(struct device *dev) |
bbb44d9f RW |
774 | { |
775 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
776 | struct device_driver *drv = dev->driver; | |
355a72d7 | 777 | int error = 0; |
bbb44d9f | 778 | |
6cbf8214 | 779 | pci_pm_default_resume_early(pci_dev); |
aa8c6c93 | 780 | |
ad8cfa1d | 781 | if (pci_has_legacy_pm_support(pci_dev)) |
f6dc1e5e | 782 | return pci_legacy_resume_early(dev); |
bb808945 | 783 | |
f6dc1e5e RW |
784 | if (drv && drv->pm && drv->pm->resume_noirq) |
785 | error = drv->pm->resume_noirq(dev); | |
bbb44d9f RW |
786 | |
787 | return error; | |
788 | } | |
789 | ||
f6dc1e5e | 790 | static int pci_pm_resume(struct device *dev) |
bbb44d9f | 791 | { |
355a72d7 | 792 | struct pci_dev *pci_dev = to_pci_dev(dev); |
8150f32b | 793 | const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; |
bbb44d9f RW |
794 | int error = 0; |
795 | ||
418e4da3 RW |
796 | /* |
797 | * This is necessary for the suspend error path in which resume is | |
798 | * called without restoring the standard config registers of the device. | |
799 | */ | |
800 | if (pci_dev->state_saved) | |
801 | pci_restore_standard_config(pci_dev); | |
802 | ||
ad8cfa1d | 803 | if (pci_has_legacy_pm_support(pci_dev)) |
f6dc1e5e | 804 | return pci_legacy_resume(dev); |
bb808945 | 805 | |
5294e256 | 806 | pci_pm_default_resume(pci_dev); |
73410429 | 807 | |
5294e256 RW |
808 | if (pm) { |
809 | if (pm->resume) | |
810 | error = pm->resume(dev); | |
811 | } else { | |
812 | pci_pm_reenable_device(pci_dev); | |
813 | } | |
bbb44d9f | 814 | |
999cce4a | 815 | return error; |
bbb44d9f RW |
816 | } |
817 | ||
818 | #else /* !CONFIG_SUSPEND */ | |
819 | ||
820 | #define pci_pm_suspend NULL | |
821 | #define pci_pm_suspend_noirq NULL | |
822 | #define pci_pm_resume NULL | |
823 | #define pci_pm_resume_noirq NULL | |
824 | ||
825 | #endif /* !CONFIG_SUSPEND */ | |
826 | ||
1f112cee | 827 | #ifdef CONFIG_HIBERNATE_CALLBACKS |
bbb44d9f RW |
828 | |
829 | static int pci_pm_freeze(struct device *dev) | |
830 | { | |
831 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
8150f32b | 832 | const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; |
bbb44d9f | 833 | |
ad8cfa1d RW |
834 | if (pci_has_legacy_pm_support(pci_dev)) |
835 | return pci_legacy_suspend(dev, PMSG_FREEZE); | |
bb808945 | 836 | |
5294e256 RW |
837 | if (!pm) { |
838 | pci_pm_default_suspend(pci_dev); | |
839 | return 0; | |
bbb44d9f RW |
840 | } |
841 | ||
5294e256 RW |
842 | if (pm->freeze) { |
843 | int error; | |
844 | ||
845 | error = pm->freeze(dev); | |
846 | suspend_report_result(pm->freeze, error); | |
847 | if (error) | |
848 | return error; | |
849 | } | |
850 | ||
5294e256 | 851 | return 0; |
bbb44d9f RW |
852 | } |
853 | ||
854 | static int pci_pm_freeze_noirq(struct device *dev) | |
855 | { | |
355a72d7 | 856 | struct pci_dev *pci_dev = to_pci_dev(dev); |
adf09493 | 857 | struct device_driver *drv = dev->driver; |
bbb44d9f | 858 | |
bb808945 RW |
859 | if (pci_has_legacy_pm_support(pci_dev)) |
860 | return pci_legacy_suspend_late(dev, PMSG_FREEZE); | |
861 | ||
d67e37d7 | 862 | if (drv && drv->pm && drv->pm->freeze_noirq) { |
46939f8b RW |
863 | int error; |
864 | ||
d67e37d7 RW |
865 | error = drv->pm->freeze_noirq(dev); |
866 | suspend_report_result(drv->pm->freeze_noirq, error); | |
46939f8b RW |
867 | if (error) |
868 | return error; | |
bbb44d9f RW |
869 | } |
870 | ||
46939f8b RW |
871 | if (!pci_dev->state_saved) |
872 | pci_save_state(pci_dev); | |
d67e37d7 | 873 | |
46939f8b RW |
874 | pci_pm_set_unknown_state(pci_dev); |
875 | ||
876 | return 0; | |
bbb44d9f RW |
877 | } |
878 | ||
f6dc1e5e | 879 | static int pci_pm_thaw_noirq(struct device *dev) |
bbb44d9f | 880 | { |
355a72d7 | 881 | struct pci_dev *pci_dev = to_pci_dev(dev); |
bbb44d9f RW |
882 | struct device_driver *drv = dev->driver; |
883 | int error = 0; | |
884 | ||
ad8cfa1d | 885 | if (pci_has_legacy_pm_support(pci_dev)) |
f6dc1e5e | 886 | return pci_legacy_resume_early(dev); |
bb808945 | 887 | |
f6dc1e5e | 888 | pci_update_current_state(pci_dev, PCI_D0); |
d67e37d7 | 889 | |
f6dc1e5e RW |
890 | if (drv && drv->pm && drv->pm->thaw_noirq) |
891 | error = drv->pm->thaw_noirq(dev); | |
bbb44d9f RW |
892 | |
893 | return error; | |
894 | } | |
895 | ||
f6dc1e5e | 896 | static int pci_pm_thaw(struct device *dev) |
bbb44d9f | 897 | { |
355a72d7 | 898 | struct pci_dev *pci_dev = to_pci_dev(dev); |
8150f32b | 899 | const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; |
bbb44d9f RW |
900 | int error = 0; |
901 | ||
ad8cfa1d | 902 | if (pci_has_legacy_pm_support(pci_dev)) |
f6dc1e5e | 903 | return pci_legacy_resume(dev); |
bb808945 | 904 | |
5294e256 RW |
905 | if (pm) { |
906 | if (pm->thaw) | |
907 | error = pm->thaw(dev); | |
908 | } else { | |
909 | pci_pm_reenable_device(pci_dev); | |
910 | } | |
bbb44d9f | 911 | |
4b77b0a2 RW |
912 | pci_dev->state_saved = false; |
913 | ||
bbb44d9f RW |
914 | return error; |
915 | } | |
916 | ||
917 | static int pci_pm_poweroff(struct device *dev) | |
918 | { | |
355a72d7 | 919 | struct pci_dev *pci_dev = to_pci_dev(dev); |
8150f32b | 920 | const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; |
bbb44d9f | 921 | |
ad8cfa1d RW |
922 | if (pci_has_legacy_pm_support(pci_dev)) |
923 | return pci_legacy_suspend(dev, PMSG_HIBERNATE); | |
bb808945 | 924 | |
5294e256 RW |
925 | if (!pm) { |
926 | pci_pm_default_suspend(pci_dev); | |
927 | goto Fixup; | |
928 | } | |
929 | ||
5294e256 | 930 | if (pm->poweroff) { |
46939f8b RW |
931 | int error; |
932 | ||
ddb7c9d2 RW |
933 | error = pm->poweroff(dev); |
934 | suspend_report_result(pm->poweroff, error); | |
46939f8b RW |
935 | if (error) |
936 | return error; | |
bbb44d9f RW |
937 | } |
938 | ||
5294e256 RW |
939 | Fixup: |
940 | pci_fixup_device(pci_fixup_suspend, pci_dev); | |
c9b9972b | 941 | |
46939f8b | 942 | return 0; |
bbb44d9f RW |
943 | } |
944 | ||
945 | static int pci_pm_poweroff_noirq(struct device *dev) | |
946 | { | |
46939f8b | 947 | struct pci_dev *pci_dev = to_pci_dev(dev); |
adf09493 | 948 | struct device_driver *drv = dev->driver; |
bbb44d9f | 949 | |
bb808945 RW |
950 | if (pci_has_legacy_pm_support(to_pci_dev(dev))) |
951 | return pci_legacy_suspend_late(dev, PMSG_HIBERNATE); | |
952 | ||
46939f8b RW |
953 | if (!drv || !drv->pm) |
954 | return 0; | |
955 | ||
956 | if (drv->pm->poweroff_noirq) { | |
957 | int error; | |
958 | ||
d67e37d7 RW |
959 | error = drv->pm->poweroff_noirq(dev); |
960 | suspend_report_result(drv->pm->poweroff_noirq, error); | |
46939f8b RW |
961 | if (error) |
962 | return error; | |
bbb44d9f RW |
963 | } |
964 | ||
46939f8b RW |
965 | if (!pci_dev->state_saved && !pci_is_bridge(pci_dev)) |
966 | pci_prepare_to_sleep(pci_dev); | |
967 | ||
0b68c8e2 RW |
968 | /* |
969 | * The reason for doing this here is the same as for the analogous code | |
970 | * in pci_pm_suspend_noirq(). | |
971 | */ | |
972 | if (pci_dev->class == PCI_CLASS_SERIAL_USB_EHCI) | |
973 | pci_write_config_word(pci_dev, PCI_COMMAND, 0); | |
974 | ||
46939f8b | 975 | return 0; |
bbb44d9f RW |
976 | } |
977 | ||
f6dc1e5e | 978 | static int pci_pm_restore_noirq(struct device *dev) |
bbb44d9f RW |
979 | { |
980 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
981 | struct device_driver *drv = dev->driver; | |
355a72d7 | 982 | int error = 0; |
bbb44d9f | 983 | |
6cbf8214 | 984 | pci_pm_default_resume_early(pci_dev); |
aa8c6c93 | 985 | |
ad8cfa1d | 986 | if (pci_has_legacy_pm_support(pci_dev)) |
f6dc1e5e | 987 | return pci_legacy_resume_early(dev); |
bb808945 | 988 | |
f6dc1e5e RW |
989 | if (drv && drv->pm && drv->pm->restore_noirq) |
990 | error = drv->pm->restore_noirq(dev); | |
bbb44d9f RW |
991 | |
992 | return error; | |
993 | } | |
994 | ||
f6dc1e5e | 995 | static int pci_pm_restore(struct device *dev) |
bbb44d9f RW |
996 | { |
997 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
8150f32b | 998 | const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; |
bbb44d9f RW |
999 | int error = 0; |
1000 | ||
418e4da3 RW |
1001 | /* |
1002 | * This is necessary for the hibernation error path in which restore is | |
1003 | * called without restoring the standard config registers of the device. | |
1004 | */ | |
1005 | if (pci_dev->state_saved) | |
1006 | pci_restore_standard_config(pci_dev); | |
1007 | ||
ad8cfa1d | 1008 | if (pci_has_legacy_pm_support(pci_dev)) |
f6dc1e5e | 1009 | return pci_legacy_resume(dev); |
bb808945 | 1010 | |
5294e256 | 1011 | pci_pm_default_resume(pci_dev); |
73410429 | 1012 | |
5294e256 RW |
1013 | if (pm) { |
1014 | if (pm->restore) | |
1015 | error = pm->restore(dev); | |
1016 | } else { | |
1017 | pci_pm_reenable_device(pci_dev); | |
1018 | } | |
bbb44d9f RW |
1019 | |
1020 | return error; | |
c8958177 | 1021 | } |
1da177e4 | 1022 | |
1f112cee | 1023 | #else /* !CONFIG_HIBERNATE_CALLBACKS */ |
bbb44d9f RW |
1024 | |
1025 | #define pci_pm_freeze NULL | |
1026 | #define pci_pm_freeze_noirq NULL | |
1027 | #define pci_pm_thaw NULL | |
1028 | #define pci_pm_thaw_noirq NULL | |
1029 | #define pci_pm_poweroff NULL | |
1030 | #define pci_pm_poweroff_noirq NULL | |
1031 | #define pci_pm_restore NULL | |
1032 | #define pci_pm_restore_noirq NULL | |
1033 | ||
1f112cee | 1034 | #endif /* !CONFIG_HIBERNATE_CALLBACKS */ |
bbb44d9f | 1035 | |
6cbf8214 RW |
1036 | #ifdef CONFIG_PM_RUNTIME |
1037 | ||
1038 | static int pci_pm_runtime_suspend(struct device *dev) | |
1039 | { | |
1040 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
1041 | const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; | |
1042 | pci_power_t prev = pci_dev->current_state; | |
1043 | int error; | |
1044 | ||
1045 | if (!pm || !pm->runtime_suspend) | |
1046 | return -ENOSYS; | |
1047 | ||
448bd857 | 1048 | pci_dev->no_d3cold = false; |
6cbf8214 RW |
1049 | error = pm->runtime_suspend(dev); |
1050 | suspend_report_result(pm->runtime_suspend, error); | |
1051 | if (error) | |
1052 | return error; | |
448bd857 HY |
1053 | if (!pci_dev->d3cold_allowed) |
1054 | pci_dev->no_d3cold = true; | |
6cbf8214 RW |
1055 | |
1056 | pci_fixup_device(pci_fixup_suspend, pci_dev); | |
1057 | ||
1058 | if (!pci_dev->state_saved && pci_dev->current_state != PCI_D0 | |
1059 | && pci_dev->current_state != PCI_UNKNOWN) { | |
1060 | WARN_ONCE(pci_dev->current_state != prev, | |
1061 | "PCI PM: State of device not saved by %pF\n", | |
1062 | pm->runtime_suspend); | |
1063 | return 0; | |
1064 | } | |
1065 | ||
1066 | if (!pci_dev->state_saved) | |
1067 | pci_save_state(pci_dev); | |
1068 | ||
1069 | pci_finish_runtime_suspend(pci_dev); | |
1070 | ||
1071 | return 0; | |
1072 | } | |
1073 | ||
1074 | static int pci_pm_runtime_resume(struct device *dev) | |
1075 | { | |
448bd857 | 1076 | int rc; |
6cbf8214 RW |
1077 | struct pci_dev *pci_dev = to_pci_dev(dev); |
1078 | const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; | |
1079 | ||
1080 | if (!pm || !pm->runtime_resume) | |
1081 | return -ENOSYS; | |
1082 | ||
db288c9c RW |
1083 | pci_restore_standard_config(pci_dev); |
1084 | pci_fixup_device(pci_fixup_resume_early, pci_dev); | |
6cbf8214 RW |
1085 | __pci_enable_wake(pci_dev, PCI_D0, true, false); |
1086 | pci_fixup_device(pci_fixup_resume, pci_dev); | |
1087 | ||
448bd857 HY |
1088 | rc = pm->runtime_resume(dev); |
1089 | ||
1090 | pci_dev->runtime_d3cold = false; | |
1091 | ||
1092 | return rc; | |
6cbf8214 RW |
1093 | } |
1094 | ||
1095 | static int pci_pm_runtime_idle(struct device *dev) | |
1096 | { | |
1097 | const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; | |
1098 | ||
1099 | if (!pm) | |
1100 | return -ENOSYS; | |
1101 | ||
1102 | if (pm->runtime_idle) { | |
1103 | int ret = pm->runtime_idle(dev); | |
1104 | if (ret) | |
1105 | return ret; | |
1106 | } | |
1107 | ||
1108 | pm_runtime_suspend(dev); | |
1109 | ||
1110 | return 0; | |
1111 | } | |
1112 | ||
1113 | #else /* !CONFIG_PM_RUNTIME */ | |
1114 | ||
1115 | #define pci_pm_runtime_suspend NULL | |
1116 | #define pci_pm_runtime_resume NULL | |
1117 | #define pci_pm_runtime_idle NULL | |
1118 | ||
1119 | #endif /* !CONFIG_PM_RUNTIME */ | |
1120 | ||
aa338601 | 1121 | #ifdef CONFIG_PM |
6cbf8214 | 1122 | |
8150f32b | 1123 | const struct dev_pm_ops pci_dev_pm_ops = { |
adf09493 RW |
1124 | .prepare = pci_pm_prepare, |
1125 | .complete = pci_pm_complete, | |
1126 | .suspend = pci_pm_suspend, | |
1127 | .resume = pci_pm_resume, | |
1128 | .freeze = pci_pm_freeze, | |
1129 | .thaw = pci_pm_thaw, | |
1130 | .poweroff = pci_pm_poweroff, | |
1131 | .restore = pci_pm_restore, | |
bbb44d9f RW |
1132 | .suspend_noirq = pci_pm_suspend_noirq, |
1133 | .resume_noirq = pci_pm_resume_noirq, | |
1134 | .freeze_noirq = pci_pm_freeze_noirq, | |
1135 | .thaw_noirq = pci_pm_thaw_noirq, | |
1136 | .poweroff_noirq = pci_pm_poweroff_noirq, | |
1137 | .restore_noirq = pci_pm_restore_noirq, | |
6cbf8214 RW |
1138 | .runtime_suspend = pci_pm_runtime_suspend, |
1139 | .runtime_resume = pci_pm_runtime_resume, | |
1140 | .runtime_idle = pci_pm_runtime_idle, | |
bbb44d9f RW |
1141 | }; |
1142 | ||
adf09493 | 1143 | #define PCI_PM_OPS_PTR (&pci_dev_pm_ops) |
bbb44d9f | 1144 | |
6cbf8214 | 1145 | #else /* !COMFIG_PM_OPS */ |
bbb44d9f RW |
1146 | |
1147 | #define PCI_PM_OPS_PTR NULL | |
1148 | ||
6cbf8214 | 1149 | #endif /* !COMFIG_PM_OPS */ |
bbb44d9f | 1150 | |
1da177e4 | 1151 | /** |
863b18f4 | 1152 | * __pci_register_driver - register a new pci driver |
1da177e4 | 1153 | * @drv: the driver structure to register |
863b18f4 | 1154 | * @owner: owner module of drv |
f95d882d | 1155 | * @mod_name: module name string |
1da177e4 LT |
1156 | * |
1157 | * Adds the driver structure to the list of registered drivers. | |
1158 | * Returns a negative value on error, otherwise 0. | |
eaae4b3a | 1159 | * If no error occurred, the driver remains registered even if |
1da177e4 LT |
1160 | * no device was claimed during registration. |
1161 | */ | |
725522b5 GKH |
1162 | int __pci_register_driver(struct pci_driver *drv, struct module *owner, |
1163 | const char *mod_name) | |
1da177e4 LT |
1164 | { |
1165 | int error; | |
1166 | ||
1167 | /* initialize common driver fields */ | |
1168 | drv->driver.name = drv->name; | |
1169 | drv->driver.bus = &pci_bus_type; | |
863b18f4 | 1170 | drv->driver.owner = owner; |
725522b5 | 1171 | drv->driver.mod_name = mod_name; |
50b00755 | 1172 | |
75865858 GKH |
1173 | spin_lock_init(&drv->dynids.lock); |
1174 | INIT_LIST_HEAD(&drv->dynids.list); | |
1da177e4 LT |
1175 | |
1176 | /* register with core */ | |
1177 | error = driver_register(&drv->driver); | |
50bf14b3 | 1178 | if (error) |
0994375e | 1179 | goto out; |
1da177e4 | 1180 | |
ed283e9f | 1181 | error = pci_create_newid_files(drv); |
50bf14b3 | 1182 | if (error) |
0994375e | 1183 | goto out_newid; |
0994375e | 1184 | out: |
1da177e4 | 1185 | return error; |
0994375e | 1186 | |
0994375e CW |
1187 | out_newid: |
1188 | driver_unregister(&drv->driver); | |
1189 | goto out; | |
1da177e4 LT |
1190 | } |
1191 | ||
1192 | /** | |
1193 | * pci_unregister_driver - unregister a pci driver | |
1194 | * @drv: the driver structure to unregister | |
1195 | * | |
1196 | * Deletes the driver structure from the list of registered PCI drivers, | |
1197 | * gives it a chance to clean up by calling its remove() function for | |
1198 | * each device it was responsible for, and marks those devices as | |
1199 | * driverless. | |
1200 | */ | |
1201 | ||
1202 | void | |
1203 | pci_unregister_driver(struct pci_driver *drv) | |
1204 | { | |
ed283e9f | 1205 | pci_remove_newid_files(drv); |
1da177e4 LT |
1206 | driver_unregister(&drv->driver); |
1207 | pci_free_dynids(drv); | |
1208 | } | |
1209 | ||
1210 | static struct pci_driver pci_compat_driver = { | |
1211 | .name = "compat" | |
1212 | }; | |
1213 | ||
1214 | /** | |
1215 | * pci_dev_driver - get the pci_driver of a device | |
1216 | * @dev: the device to query | |
1217 | * | |
1218 | * Returns the appropriate pci_driver structure or %NULL if there is no | |
1219 | * registered driver for the device. | |
1220 | */ | |
1221 | struct pci_driver * | |
1222 | pci_dev_driver(const struct pci_dev *dev) | |
1223 | { | |
1224 | if (dev->driver) | |
1225 | return dev->driver; | |
1226 | else { | |
1227 | int i; | |
1228 | for(i=0; i<=PCI_ROM_RESOURCE; i++) | |
1229 | if (dev->resource[i].flags & IORESOURCE_BUSY) | |
1230 | return &pci_compat_driver; | |
1231 | } | |
1232 | return NULL; | |
1233 | } | |
1234 | ||
1235 | /** | |
1236 | * pci_bus_match - Tell if a PCI device structure has a matching PCI device id structure | |
1da177e4 | 1237 | * @dev: the PCI device structure to match against |
8f7020d3 | 1238 | * @drv: the device driver to search for matching PCI device id structures |
1da177e4 LT |
1239 | * |
1240 | * Used by a driver to check whether a PCI device present in the | |
8f7020d3 | 1241 | * system is in its list of supported devices. Returns the matching |
1da177e4 LT |
1242 | * pci_device_id structure or %NULL if there is no match. |
1243 | */ | |
75865858 | 1244 | static int pci_bus_match(struct device *dev, struct device_driver *drv) |
1da177e4 | 1245 | { |
75865858 GKH |
1246 | struct pci_dev *pci_dev = to_pci_dev(dev); |
1247 | struct pci_driver *pci_drv = to_pci_driver(drv); | |
1da177e4 LT |
1248 | const struct pci_device_id *found_id; |
1249 | ||
75865858 | 1250 | found_id = pci_match_device(pci_drv, pci_dev); |
1da177e4 LT |
1251 | if (found_id) |
1252 | return 1; | |
1253 | ||
75865858 | 1254 | return 0; |
1da177e4 LT |
1255 | } |
1256 | ||
1257 | /** | |
1258 | * pci_dev_get - increments the reference count of the pci device structure | |
1259 | * @dev: the device being referenced | |
1260 | * | |
1261 | * Each live reference to a device should be refcounted. | |
1262 | * | |
1263 | * Drivers for PCI devices should normally record such references in | |
1264 | * their probe() methods, when they bind to a device, and release | |
1265 | * them by calling pci_dev_put(), in their disconnect() methods. | |
1266 | * | |
1267 | * A pointer to the device with the incremented reference counter is returned. | |
1268 | */ | |
1269 | struct pci_dev *pci_dev_get(struct pci_dev *dev) | |
1270 | { | |
1271 | if (dev) | |
1272 | get_device(&dev->dev); | |
1273 | return dev; | |
1274 | } | |
1275 | ||
1276 | /** | |
1277 | * pci_dev_put - release a use of the pci device structure | |
1278 | * @dev: device that's been disconnected | |
1279 | * | |
1280 | * Must be called when a user of a device is finished with it. When the last | |
1281 | * user of the device calls this function, the memory of the device is freed. | |
1282 | */ | |
1283 | void pci_dev_put(struct pci_dev *dev) | |
1284 | { | |
1285 | if (dev) | |
1286 | put_device(&dev->dev); | |
1287 | } | |
1288 | ||
1289 | #ifndef CONFIG_HOTPLUG | |
7eff2e7a | 1290 | int pci_uevent(struct device *dev, struct kobj_uevent_env *env) |
1da177e4 LT |
1291 | { |
1292 | return -ENODEV; | |
1293 | } | |
1294 | #endif | |
1295 | ||
1296 | struct bus_type pci_bus_type = { | |
1297 | .name = "pci", | |
1298 | .match = pci_bus_match, | |
312c004d | 1299 | .uevent = pci_uevent, |
b15d686a RK |
1300 | .probe = pci_device_probe, |
1301 | .remove = pci_device_remove, | |
cbd69dbb | 1302 | .shutdown = pci_device_shutdown, |
1da177e4 | 1303 | .dev_attrs = pci_dev_attrs, |
705b1aaa | 1304 | .bus_attrs = pci_bus_attrs, |
bbb44d9f | 1305 | .pm = PCI_PM_OPS_PTR, |
1da177e4 LT |
1306 | }; |
1307 | ||
1308 | static int __init pci_driver_init(void) | |
1309 | { | |
1310 | return bus_register(&pci_bus_type); | |
1311 | } | |
1312 | ||
1313 | postcore_initcall(pci_driver_init); | |
1314 | ||
9dba910e | 1315 | EXPORT_SYMBOL_GPL(pci_add_dynid); |
75865858 | 1316 | EXPORT_SYMBOL(pci_match_id); |
863b18f4 | 1317 | EXPORT_SYMBOL(__pci_register_driver); |
1da177e4 LT |
1318 | EXPORT_SYMBOL(pci_unregister_driver); |
1319 | EXPORT_SYMBOL(pci_dev_driver); | |
1320 | EXPORT_SYMBOL(pci_bus_type); | |
1321 | EXPORT_SYMBOL(pci_dev_get); | |
1322 | EXPORT_SYMBOL(pci_dev_put); |