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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> |
4fc9bbf9 | 22 | #include <linux/kexec.h> |
1da177e4 LT |
23 | #include "pci.h" |
24 | ||
75865858 GKH |
25 | struct pci_dynid { |
26 | struct list_head node; | |
27 | struct pci_device_id id; | |
28 | }; | |
1da177e4 | 29 | |
9dba910e TH |
30 | /** |
31 | * pci_add_dynid - add a new PCI device ID to this driver and re-probe devices | |
32 | * @drv: target pci driver | |
33 | * @vendor: PCI vendor ID | |
34 | * @device: PCI device ID | |
35 | * @subvendor: PCI subvendor ID | |
36 | * @subdevice: PCI subdevice ID | |
37 | * @class: PCI class | |
38 | * @class_mask: PCI class mask | |
39 | * @driver_data: private driver data | |
40 | * | |
41 | * Adds a new dynamic pci device ID to this driver and causes the | |
42 | * driver to probe for all devices again. @drv must have been | |
43 | * registered prior to calling this function. | |
44 | * | |
45 | * CONTEXT: | |
46 | * Does GFP_KERNEL allocation. | |
47 | * | |
48 | * RETURNS: | |
49 | * 0 on success, -errno on failure. | |
50 | */ | |
51 | int pci_add_dynid(struct pci_driver *drv, | |
52 | unsigned int vendor, unsigned int device, | |
53 | unsigned int subvendor, unsigned int subdevice, | |
54 | unsigned int class, unsigned int class_mask, | |
55 | unsigned long driver_data) | |
56 | { | |
57 | struct pci_dynid *dynid; | |
58 | int retval; | |
59 | ||
60 | dynid = kzalloc(sizeof(*dynid), GFP_KERNEL); | |
61 | if (!dynid) | |
62 | return -ENOMEM; | |
63 | ||
64 | dynid->id.vendor = vendor; | |
65 | dynid->id.device = device; | |
66 | dynid->id.subvendor = subvendor; | |
67 | dynid->id.subdevice = subdevice; | |
68 | dynid->id.class = class; | |
69 | dynid->id.class_mask = class_mask; | |
70 | dynid->id.driver_data = driver_data; | |
3d3c2ae1 | 71 | |
9dba910e TH |
72 | spin_lock(&drv->dynids.lock); |
73 | list_add_tail(&dynid->node, &drv->dynids.list); | |
74 | spin_unlock(&drv->dynids.lock); | |
75 | ||
9dba910e | 76 | retval = driver_attach(&drv->driver); |
9dba910e TH |
77 | |
78 | return retval; | |
79 | } | |
80 | ||
81 | static void pci_free_dynids(struct pci_driver *drv) | |
82 | { | |
83 | struct pci_dynid *dynid, *n; | |
3d3c2ae1 | 84 | |
9dba910e TH |
85 | spin_lock(&drv->dynids.lock); |
86 | list_for_each_entry_safe(dynid, n, &drv->dynids.list, node) { | |
87 | list_del(&dynid->node); | |
88 | kfree(dynid); | |
89 | } | |
90 | spin_unlock(&drv->dynids.lock); | |
91 | } | |
92 | ||
1da177e4 | 93 | /** |
9dba910e | 94 | * store_new_id - sysfs frontend to pci_add_dynid() |
8f7020d3 RD |
95 | * @driver: target device driver |
96 | * @buf: buffer for scanning device ID data | |
97 | * @count: input size | |
1da177e4 | 98 | * |
9dba910e | 99 | * Allow PCI IDs to be added to an existing driver via sysfs. |
1da177e4 | 100 | */ |
f8eb1005 | 101 | static ssize_t |
1da177e4 LT |
102 | store_new_id(struct device_driver *driver, const char *buf, size_t count) |
103 | { | |
1da177e4 | 104 | struct pci_driver *pdrv = to_pci_driver(driver); |
b41d6cf3 | 105 | const struct pci_device_id *ids = pdrv->id_table; |
6ba18636 | 106 | __u32 vendor, device, subvendor=PCI_ANY_ID, |
1da177e4 LT |
107 | subdevice=PCI_ANY_ID, class=0, class_mask=0; |
108 | unsigned long driver_data=0; | |
109 | int fields=0; | |
9dba910e | 110 | int retval; |
1da177e4 | 111 | |
b41d6cf3 | 112 | fields = sscanf(buf, "%x %x %x %x %x %x %lx", |
1da177e4 LT |
113 | &vendor, &device, &subvendor, &subdevice, |
114 | &class, &class_mask, &driver_data); | |
6ba18636 | 115 | if (fields < 2) |
1da177e4 LT |
116 | return -EINVAL; |
117 | ||
b41d6cf3 JD |
118 | /* Only accept driver_data values that match an existing id_table |
119 | entry */ | |
2debb4d2 CW |
120 | if (ids) { |
121 | retval = -EINVAL; | |
122 | while (ids->vendor || ids->subvendor || ids->class_mask) { | |
123 | if (driver_data == ids->driver_data) { | |
124 | retval = 0; | |
125 | break; | |
126 | } | |
127 | ids++; | |
b41d6cf3 | 128 | } |
2debb4d2 CW |
129 | if (retval) /* No match */ |
130 | return retval; | |
b41d6cf3 | 131 | } |
b41d6cf3 | 132 | |
9dba910e TH |
133 | retval = pci_add_dynid(pdrv, vendor, device, subvendor, subdevice, |
134 | class, class_mask, driver_data); | |
b19441af GKH |
135 | if (retval) |
136 | return retval; | |
1da177e4 LT |
137 | return count; |
138 | } | |
2229c1fb | 139 | static DRIVER_ATTR(new_id, S_IWUSR, NULL, store_new_id); |
1da177e4 | 140 | |
0994375e CW |
141 | /** |
142 | * store_remove_id - remove a PCI device ID from this driver | |
143 | * @driver: target device driver | |
144 | * @buf: buffer for scanning device ID data | |
145 | * @count: input size | |
146 | * | |
147 | * Removes a dynamic pci device ID to this driver. | |
148 | */ | |
149 | static ssize_t | |
150 | store_remove_id(struct device_driver *driver, const char *buf, size_t count) | |
151 | { | |
152 | struct pci_dynid *dynid, *n; | |
153 | struct pci_driver *pdrv = to_pci_driver(driver); | |
154 | __u32 vendor, device, subvendor = PCI_ANY_ID, | |
155 | subdevice = PCI_ANY_ID, class = 0, class_mask = 0; | |
156 | int fields = 0; | |
157 | int retval = -ENODEV; | |
158 | ||
159 | fields = sscanf(buf, "%x %x %x %x %x %x", | |
160 | &vendor, &device, &subvendor, &subdevice, | |
161 | &class, &class_mask); | |
162 | if (fields < 2) | |
163 | return -EINVAL; | |
164 | ||
165 | spin_lock(&pdrv->dynids.lock); | |
166 | list_for_each_entry_safe(dynid, n, &pdrv->dynids.list, node) { | |
167 | struct pci_device_id *id = &dynid->id; | |
168 | if ((id->vendor == vendor) && | |
169 | (id->device == device) && | |
170 | (subvendor == PCI_ANY_ID || id->subvendor == subvendor) && | |
171 | (subdevice == PCI_ANY_ID || id->subdevice == subdevice) && | |
172 | !((id->class ^ class) & class_mask)) { | |
173 | list_del(&dynid->node); | |
174 | kfree(dynid); | |
175 | retval = 0; | |
176 | break; | |
177 | } | |
178 | } | |
179 | spin_unlock(&pdrv->dynids.lock); | |
180 | ||
181 | if (retval) | |
182 | return retval; | |
183 | return count; | |
184 | } | |
2229c1fb | 185 | static DRIVER_ATTR(remove_id, S_IWUSR, NULL, store_remove_id); |
0994375e | 186 | |
2229c1fb GKH |
187 | static struct attribute *pci_drv_attrs[] = { |
188 | &driver_attr_new_id.attr, | |
189 | &driver_attr_remove_id.attr, | |
190 | NULL, | |
bfb09a86 | 191 | }; |
2229c1fb | 192 | ATTRIBUTE_GROUPS(pci_drv); |
0994375e | 193 | |
1da177e4 | 194 | /** |
75865858 | 195 | * pci_match_id - See if a pci device matches a given pci_id table |
1da177e4 | 196 | * @ids: array of PCI device id structures to search in |
75865858 GKH |
197 | * @dev: the PCI device structure to match against. |
198 | * | |
1da177e4 | 199 | * Used by a driver to check whether a PCI device present in the |
75865858 | 200 | * system is in its list of supported devices. Returns the matching |
1da177e4 | 201 | * pci_device_id structure or %NULL if there is no match. |
75865858 | 202 | * |
8b60756a | 203 | * Deprecated, don't use this as it will not catch any dynamic ids |
75865858 | 204 | * that a driver might want to check for. |
1da177e4 | 205 | */ |
75865858 GKH |
206 | const struct pci_device_id *pci_match_id(const struct pci_device_id *ids, |
207 | struct pci_dev *dev) | |
1da177e4 | 208 | { |
75865858 GKH |
209 | if (ids) { |
210 | while (ids->vendor || ids->subvendor || ids->class_mask) { | |
211 | if (pci_match_one_device(ids, dev)) | |
212 | return ids; | |
213 | ids++; | |
214 | } | |
1da177e4 LT |
215 | } |
216 | return NULL; | |
217 | } | |
218 | ||
219 | /** | |
ae9608af | 220 | * pci_match_device - Tell if a PCI device structure has a matching PCI device id structure |
75865858 | 221 | * @drv: the PCI driver to match against |
39ba487f | 222 | * @dev: the PCI device structure to match against |
75865858 GKH |
223 | * |
224 | * Used by a driver to check whether a PCI device present in the | |
225 | * system is in its list of supported devices. Returns the matching | |
226 | * pci_device_id structure or %NULL if there is no match. | |
1da177e4 | 227 | */ |
d73460d7 AB |
228 | static const struct pci_device_id *pci_match_device(struct pci_driver *drv, |
229 | struct pci_dev *dev) | |
75865858 | 230 | { |
75865858 | 231 | struct pci_dynid *dynid; |
1da177e4 | 232 | |
7461b60a | 233 | /* Look at the dynamic ids first, before the static ones */ |
75865858 GKH |
234 | spin_lock(&drv->dynids.lock); |
235 | list_for_each_entry(dynid, &drv->dynids.list, node) { | |
236 | if (pci_match_one_device(&dynid->id, dev)) { | |
237 | spin_unlock(&drv->dynids.lock); | |
238 | return &dynid->id; | |
239 | } | |
1da177e4 | 240 | } |
75865858 | 241 | spin_unlock(&drv->dynids.lock); |
7461b60a RK |
242 | |
243 | return pci_match_id(drv->id_table, dev); | |
1da177e4 LT |
244 | } |
245 | ||
873392ca RR |
246 | struct drv_dev_and_id { |
247 | struct pci_driver *drv; | |
248 | struct pci_dev *dev; | |
249 | const struct pci_device_id *id; | |
250 | }; | |
251 | ||
252 | static long local_pci_probe(void *_ddi) | |
253 | { | |
254 | struct drv_dev_and_id *ddi = _ddi; | |
967577b0 HY |
255 | struct pci_dev *pci_dev = ddi->dev; |
256 | struct pci_driver *pci_drv = ddi->drv; | |
257 | struct device *dev = &pci_dev->dev; | |
f3ec4f87 AS |
258 | int rc; |
259 | ||
967577b0 HY |
260 | /* |
261 | * Unbound PCI devices are always put in D0, regardless of | |
262 | * runtime PM status. During probe, the device is set to | |
263 | * active and the usage count is incremented. If the driver | |
264 | * supports runtime PM, it should call pm_runtime_put_noidle() | |
265 | * in its probe routine and pm_runtime_get_noresume() in its | |
266 | * remove routine. | |
f3ec4f87 | 267 | */ |
967577b0 HY |
268 | pm_runtime_get_sync(dev); |
269 | pci_dev->driver = pci_drv; | |
270 | rc = pci_drv->probe(pci_dev, ddi->id); | |
f92d74c1 SC |
271 | if (!rc) |
272 | return rc; | |
273 | if (rc < 0) { | |
967577b0 HY |
274 | pci_dev->driver = NULL; |
275 | pm_runtime_put_sync(dev); | |
f92d74c1 | 276 | return rc; |
f3ec4f87 | 277 | } |
f92d74c1 SC |
278 | /* |
279 | * Probe function should return < 0 for failure, 0 for success | |
280 | * Treat values > 0 as success, but warn. | |
281 | */ | |
282 | dev_warn(dev, "Driver probe function unexpectedly returned %d\n", rc); | |
283 | return 0; | |
873392ca RR |
284 | } |
285 | ||
d42c6997 AK |
286 | static int pci_call_probe(struct pci_driver *drv, struct pci_dev *dev, |
287 | const struct pci_device_id *id) | |
288 | { | |
873392ca RR |
289 | int error, node; |
290 | struct drv_dev_and_id ddi = { drv, dev, id }; | |
291 | ||
12c3156f AD |
292 | /* |
293 | * Execute driver initialization on node where the device is | |
294 | * attached. This way the driver likely allocates its local memory | |
295 | * on the right node. | |
296 | */ | |
873392ca | 297 | node = dev_to_node(&dev->dev); |
12c3156f AD |
298 | |
299 | /* | |
300 | * On NUMA systems, we are likely to call a PF probe function using | |
301 | * work_on_cpu(). If that probe calls pci_enable_sriov() (which | |
302 | * adds the VF devices via pci_bus_add_device()), we may re-enter | |
303 | * this function to call the VF probe function. Calling | |
304 | * work_on_cpu() again will cause a lockdep warning. Since VFs are | |
305 | * always on the same node as the PF, we can work around this by | |
306 | * avoiding work_on_cpu() when we're already on the correct node. | |
307 | * | |
308 | * Preemption is enabled, so it's theoretically unsafe to use | |
309 | * numa_node_id(), but even if we run the probe function on the | |
310 | * wrong node, it should be functionally correct. | |
311 | */ | |
312 | if (node >= 0 && node != numa_node_id()) { | |
873392ca | 313 | int cpu; |
873392ca RR |
314 | |
315 | get_online_cpus(); | |
a70f7302 | 316 | cpu = cpumask_any_and(cpumask_of_node(node), cpu_online_mask); |
873392ca RR |
317 | if (cpu < nr_cpu_ids) |
318 | error = work_on_cpu(cpu, local_pci_probe, &ddi); | |
319 | else | |
320 | error = local_pci_probe(&ddi); | |
321 | put_online_cpus(); | |
322 | } else | |
323 | error = local_pci_probe(&ddi); | |
12c3156f | 324 | |
d42c6997 AK |
325 | return error; |
326 | } | |
327 | ||
1da177e4 | 328 | /** |
23ea3793 | 329 | * __pci_device_probe - check if a driver wants to claim a specific PCI device |
8f7020d3 RD |
330 | * @drv: driver to call to check if it wants the PCI device |
331 | * @pci_dev: PCI device being probed | |
f7625980 | 332 | * |
8f7020d3 | 333 | * returns 0 on success, else error. |
1da177e4 LT |
334 | * side-effect: pci_dev->driver is set to drv when drv claims pci_dev. |
335 | */ | |
336 | static int | |
337 | __pci_device_probe(struct pci_driver *drv, struct pci_dev *pci_dev) | |
75865858 GKH |
338 | { |
339 | const struct pci_device_id *id; | |
1da177e4 LT |
340 | int error = 0; |
341 | ||
342 | if (!pci_dev->driver && drv->probe) { | |
75865858 GKH |
343 | error = -ENODEV; |
344 | ||
345 | id = pci_match_device(drv, pci_dev); | |
346 | if (id) | |
d42c6997 | 347 | error = pci_call_probe(drv, pci_dev, id); |
967577b0 | 348 | if (error >= 0) |
75865858 | 349 | error = 0; |
1da177e4 LT |
350 | } |
351 | return error; | |
352 | } | |
353 | ||
354 | static int pci_device_probe(struct device * dev) | |
355 | { | |
356 | int error = 0; | |
357 | struct pci_driver *drv; | |
358 | struct pci_dev *pci_dev; | |
359 | ||
360 | drv = to_pci_driver(dev->driver); | |
361 | pci_dev = to_pci_dev(dev); | |
362 | pci_dev_get(pci_dev); | |
363 | error = __pci_device_probe(drv, pci_dev); | |
364 | if (error) | |
365 | pci_dev_put(pci_dev); | |
366 | ||
367 | return error; | |
368 | } | |
369 | ||
370 | static int pci_device_remove(struct device * dev) | |
371 | { | |
372 | struct pci_dev * pci_dev = to_pci_dev(dev); | |
373 | struct pci_driver * drv = pci_dev->driver; | |
374 | ||
375 | if (drv) { | |
f3ec4f87 AS |
376 | if (drv->remove) { |
377 | pm_runtime_get_sync(dev); | |
1da177e4 | 378 | drv->remove(pci_dev); |
f3ec4f87 AS |
379 | pm_runtime_put_noidle(dev); |
380 | } | |
1da177e4 LT |
381 | pci_dev->driver = NULL; |
382 | } | |
383 | ||
f3ec4f87 | 384 | /* Undo the runtime PM settings in local_pci_probe() */ |
967577b0 | 385 | pm_runtime_put_sync(dev); |
f3ec4f87 | 386 | |
2449e06a SL |
387 | /* |
388 | * If the device is still on, set the power state as "unknown", | |
389 | * since it might change by the next time we load the driver. | |
390 | */ | |
391 | if (pci_dev->current_state == PCI_D0) | |
392 | pci_dev->current_state = PCI_UNKNOWN; | |
393 | ||
1da177e4 LT |
394 | /* |
395 | * We would love to complain here if pci_dev->is_enabled is set, that | |
396 | * the driver should have called pci_disable_device(), but the | |
397 | * unfortunate fact is there are too many odd BIOS and bridge setups | |
f7625980 | 398 | * that don't like drivers doing that all of the time. |
1da177e4 LT |
399 | * Oh well, we can dream of sane hardware when we sleep, no matter how |
400 | * horrible the crap we have to deal with is when we are awake... | |
401 | */ | |
402 | ||
403 | pci_dev_put(pci_dev); | |
404 | return 0; | |
405 | } | |
406 | ||
bbb44d9f RW |
407 | static void pci_device_shutdown(struct device *dev) |
408 | { | |
409 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
410 | struct pci_driver *drv = pci_dev->driver; | |
411 | ||
3ff2de9b HY |
412 | pm_runtime_resume(dev); |
413 | ||
bbb44d9f RW |
414 | if (drv && drv->shutdown) |
415 | drv->shutdown(pci_dev); | |
416 | pci_msi_shutdown(pci_dev); | |
417 | pci_msix_shutdown(pci_dev); | |
5b415f1e | 418 | |
4fc9bbf9 | 419 | #ifdef CONFIG_KEXEC |
b566a22c | 420 | /* |
4fc9bbf9 KA |
421 | * If this is a kexec reboot, turn off Bus Master bit on the |
422 | * device to tell it to not continue to do DMA. Don't touch | |
423 | * devices in D3cold or unknown states. | |
424 | * If it is not a kexec reboot, firmware will hit the PCI | |
425 | * devices with big hammer and stop their DMA any way. | |
b566a22c | 426 | */ |
4fc9bbf9 | 427 | if (kexec_in_progress && (pci_dev->current_state <= PCI_D3hot)) |
6e0eda3c | 428 | pci_clear_master(pci_dev); |
4fc9bbf9 | 429 | #endif |
bbb44d9f RW |
430 | } |
431 | ||
aa338601 | 432 | #ifdef CONFIG_PM |
6cbf8214 RW |
433 | |
434 | /* Auxiliary functions used for system resume and run-time resume. */ | |
435 | ||
436 | /** | |
437 | * pci_restore_standard_config - restore standard config registers of PCI device | |
438 | * @pci_dev: PCI device to handle | |
439 | */ | |
440 | static int pci_restore_standard_config(struct pci_dev *pci_dev) | |
441 | { | |
442 | pci_update_current_state(pci_dev, PCI_UNKNOWN); | |
443 | ||
444 | if (pci_dev->current_state != PCI_D0) { | |
445 | int error = pci_set_power_state(pci_dev, PCI_D0); | |
446 | if (error) | |
447 | return error; | |
448 | } | |
449 | ||
1d3c16a8 JM |
450 | pci_restore_state(pci_dev); |
451 | return 0; | |
6cbf8214 RW |
452 | } |
453 | ||
db288c9c RW |
454 | #endif |
455 | ||
456 | #ifdef CONFIG_PM_SLEEP | |
457 | ||
6cbf8214 RW |
458 | static void pci_pm_default_resume_early(struct pci_dev *pci_dev) |
459 | { | |
db288c9c RW |
460 | pci_power_up(pci_dev); |
461 | pci_restore_state(pci_dev); | |
6cbf8214 RW |
462 | pci_fixup_device(pci_fixup_resume_early, pci_dev); |
463 | } | |
464 | ||
fa58d305 RW |
465 | /* |
466 | * Default "suspend" method for devices that have no driver provided suspend, | |
467 | * or not even a driver at all (second part). | |
bbb44d9f | 468 | */ |
bb808945 | 469 | static void pci_pm_set_unknown_state(struct pci_dev *pci_dev) |
bbb44d9f | 470 | { |
bbb44d9f RW |
471 | /* |
472 | * mark its power state as "unknown", since we don't know if | |
473 | * e.g. the BIOS will change its device state when we suspend. | |
474 | */ | |
475 | if (pci_dev->current_state == PCI_D0) | |
476 | pci_dev->current_state = PCI_UNKNOWN; | |
477 | } | |
478 | ||
355a72d7 RW |
479 | /* |
480 | * Default "resume" method for devices that have no driver provided resume, | |
481 | * or not even a driver at all (second part). | |
482 | */ | |
bb808945 | 483 | static int pci_pm_reenable_device(struct pci_dev *pci_dev) |
355a72d7 RW |
484 | { |
485 | int retval; | |
486 | ||
bbb44d9f RW |
487 | /* if the device was enabled before suspend, reenable */ |
488 | retval = pci_reenable_device(pci_dev); | |
489 | /* | |
490 | * if the device was busmaster before the suspend, make it busmaster | |
491 | * again | |
492 | */ | |
493 | if (pci_dev->is_busmaster) | |
494 | pci_set_master(pci_dev); | |
495 | ||
496 | return retval; | |
497 | } | |
498 | ||
499 | static int pci_legacy_suspend(struct device *dev, pm_message_t state) | |
1da177e4 LT |
500 | { |
501 | struct pci_dev * pci_dev = to_pci_dev(dev); | |
502 | struct pci_driver * drv = pci_dev->driver; | |
46939f8b | 503 | |
02669492 | 504 | if (drv && drv->suspend) { |
99dadce8 | 505 | pci_power_t prev = pci_dev->current_state; |
46939f8b | 506 | int error; |
aa8c6c93 | 507 | |
57ef8026 FP |
508 | error = drv->suspend(pci_dev, state); |
509 | suspend_report_result(drv->suspend, error); | |
510 | if (error) | |
511 | return error; | |
aa8c6c93 | 512 | |
46939f8b | 513 | if (!pci_dev->state_saved && pci_dev->current_state != PCI_D0 |
99dadce8 RW |
514 | && pci_dev->current_state != PCI_UNKNOWN) { |
515 | WARN_ONCE(pci_dev->current_state != prev, | |
516 | "PCI PM: Device state not saved by %pF\n", | |
517 | drv->suspend); | |
99dadce8 | 518 | } |
02669492 | 519 | } |
ad8cfa1d RW |
520 | |
521 | pci_fixup_device(pci_fixup_suspend, pci_dev); | |
522 | ||
46939f8b | 523 | return 0; |
1da177e4 LT |
524 | } |
525 | ||
bbb44d9f | 526 | static int pci_legacy_suspend_late(struct device *dev, pm_message_t state) |
cbd69dbb LT |
527 | { |
528 | struct pci_dev * pci_dev = to_pci_dev(dev); | |
529 | struct pci_driver * drv = pci_dev->driver; | |
cbd69dbb LT |
530 | |
531 | if (drv && drv->suspend_late) { | |
46939f8b RW |
532 | pci_power_t prev = pci_dev->current_state; |
533 | int error; | |
534 | ||
57ef8026 FP |
535 | error = drv->suspend_late(pci_dev, state); |
536 | suspend_report_result(drv->suspend_late, error); | |
46939f8b RW |
537 | if (error) |
538 | return error; | |
539 | ||
540 | if (!pci_dev->state_saved && pci_dev->current_state != PCI_D0 | |
541 | && pci_dev->current_state != PCI_UNKNOWN) { | |
542 | WARN_ONCE(pci_dev->current_state != prev, | |
543 | "PCI PM: Device state not saved by %pF\n", | |
544 | drv->suspend_late); | |
545 | return 0; | |
546 | } | |
cbd69dbb | 547 | } |
46939f8b RW |
548 | |
549 | if (!pci_dev->state_saved) | |
550 | pci_save_state(pci_dev); | |
551 | ||
552 | pci_pm_set_unknown_state(pci_dev); | |
553 | ||
554 | return 0; | |
cbd69dbb | 555 | } |
1da177e4 | 556 | |
f6dc1e5e RW |
557 | static int pci_legacy_resume_early(struct device *dev) |
558 | { | |
f6dc1e5e RW |
559 | struct pci_dev * pci_dev = to_pci_dev(dev); |
560 | struct pci_driver * drv = pci_dev->driver; | |
561 | ||
aa8c6c93 RW |
562 | return drv && drv->resume_early ? |
563 | drv->resume_early(pci_dev) : 0; | |
f6dc1e5e RW |
564 | } |
565 | ||
bbb44d9f | 566 | static int pci_legacy_resume(struct device *dev) |
1da177e4 LT |
567 | { |
568 | struct pci_dev * pci_dev = to_pci_dev(dev); | |
569 | struct pci_driver * drv = pci_dev->driver; | |
570 | ||
ad8cfa1d RW |
571 | pci_fixup_device(pci_fixup_resume, pci_dev); |
572 | ||
aa8c6c93 RW |
573 | return drv && drv->resume ? |
574 | drv->resume(pci_dev) : pci_pm_reenable_device(pci_dev); | |
1da177e4 LT |
575 | } |
576 | ||
571ff758 RW |
577 | /* Auxiliary functions used by the new power management framework */ |
578 | ||
5294e256 | 579 | static void pci_pm_default_resume(struct pci_dev *pci_dev) |
571ff758 | 580 | { |
73410429 RW |
581 | pci_fixup_device(pci_fixup_resume, pci_dev); |
582 | ||
5294e256 RW |
583 | if (!pci_is_bridge(pci_dev)) |
584 | pci_enable_wake(pci_dev, PCI_D0, false); | |
571ff758 RW |
585 | } |
586 | ||
5294e256 | 587 | static void pci_pm_default_suspend(struct pci_dev *pci_dev) |
73410429 | 588 | { |
5294e256 | 589 | /* Disable non-bridge devices without PM support */ |
cbbc2f6b RW |
590 | if (!pci_is_bridge(pci_dev)) |
591 | pci_disable_enabled_device(pci_dev); | |
73410429 RW |
592 | } |
593 | ||
07e836e8 RW |
594 | static bool pci_has_legacy_pm_support(struct pci_dev *pci_dev) |
595 | { | |
596 | struct pci_driver *drv = pci_dev->driver; | |
bb808945 | 597 | bool ret = drv && (drv->suspend || drv->suspend_late || drv->resume |
07e836e8 | 598 | || drv->resume_early); |
bb808945 RW |
599 | |
600 | /* | |
601 | * Legacy PM support is used by default, so warn if the new framework is | |
602 | * supported as well. Drivers are supposed to support either the | |
603 | * former, or the latter, but not both at the same time. | |
604 | */ | |
82440a82 DF |
605 | WARN(ret && drv->driver.pm, "driver %s device %04x:%04x\n", |
606 | drv->name, pci_dev->vendor, pci_dev->device); | |
bb808945 RW |
607 | |
608 | return ret; | |
07e836e8 RW |
609 | } |
610 | ||
571ff758 RW |
611 | /* New power management framework */ |
612 | ||
bbb44d9f RW |
613 | static int pci_pm_prepare(struct device *dev) |
614 | { | |
615 | struct device_driver *drv = dev->driver; | |
616 | int error = 0; | |
617 | ||
6cbf8214 | 618 | /* |
7cd0602d RW |
619 | * Devices having power.ignore_children set may still be necessary for |
620 | * suspending their children in the next phase of device suspend. | |
6cbf8214 | 621 | */ |
7cd0602d RW |
622 | if (dev->power.ignore_children) |
623 | pm_runtime_resume(dev); | |
6cbf8214 | 624 | |
bbb44d9f RW |
625 | if (drv && drv->pm && drv->pm->prepare) |
626 | error = drv->pm->prepare(dev); | |
627 | ||
628 | return error; | |
629 | } | |
630 | ||
bbb44d9f | 631 | |
6cbf8214 RW |
632 | #else /* !CONFIG_PM_SLEEP */ |
633 | ||
634 | #define pci_pm_prepare NULL | |
6cbf8214 RW |
635 | |
636 | #endif /* !CONFIG_PM_SLEEP */ | |
637 | ||
bbb44d9f RW |
638 | #ifdef CONFIG_SUSPEND |
639 | ||
640 | static int pci_pm_suspend(struct device *dev) | |
641 | { | |
642 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
8150f32b | 643 | const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; |
bbb44d9f | 644 | |
ad8cfa1d RW |
645 | if (pci_has_legacy_pm_support(pci_dev)) |
646 | return pci_legacy_suspend(dev, PMSG_SUSPEND); | |
bb808945 | 647 | |
5294e256 RW |
648 | if (!pm) { |
649 | pci_pm_default_suspend(pci_dev); | |
650 | goto Fixup; | |
651 | } | |
652 | ||
7cd0602d RW |
653 | /* |
654 | * PCI devices suspended at run time need to be resumed at this point, | |
655 | * because in general it is necessary to reconfigure them for system | |
656 | * suspend. Namely, if the device is supposed to wake up the system | |
657 | * from the sleep state, we may need to reconfigure it for this purpose. | |
658 | * In turn, if the device is not supposed to wake up the system from the | |
659 | * sleep state, we'll have to prevent it from signaling wake-up. | |
660 | */ | |
661 | pm_runtime_resume(dev); | |
662 | ||
82fee4d6 | 663 | pci_dev->state_saved = false; |
5294e256 RW |
664 | if (pm->suspend) { |
665 | pci_power_t prev = pci_dev->current_state; | |
666 | int error; | |
667 | ||
ddb7c9d2 RW |
668 | error = pm->suspend(dev); |
669 | suspend_report_result(pm->suspend, error); | |
5294e256 RW |
670 | if (error) |
671 | return error; | |
672 | ||
46939f8b | 673 | if (!pci_dev->state_saved && pci_dev->current_state != PCI_D0 |
5294e256 RW |
674 | && pci_dev->current_state != PCI_UNKNOWN) { |
675 | WARN_ONCE(pci_dev->current_state != prev, | |
676 | "PCI PM: State of device not saved by %pF\n", | |
677 | pm->suspend); | |
5294e256 | 678 | } |
bbb44d9f | 679 | } |
fa58d305 | 680 | |
5294e256 RW |
681 | Fixup: |
682 | pci_fixup_device(pci_fixup_suspend, pci_dev); | |
683 | ||
684 | return 0; | |
bbb44d9f RW |
685 | } |
686 | ||
687 | static int pci_pm_suspend_noirq(struct device *dev) | |
c8958177 | 688 | { |
355a72d7 | 689 | struct pci_dev *pci_dev = to_pci_dev(dev); |
8150f32b | 690 | const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; |
c8958177 | 691 | |
bb808945 RW |
692 | if (pci_has_legacy_pm_support(pci_dev)) |
693 | return pci_legacy_suspend_late(dev, PMSG_SUSPEND); | |
694 | ||
931ff68a RW |
695 | if (!pm) { |
696 | pci_save_state(pci_dev); | |
46939f8b | 697 | return 0; |
931ff68a | 698 | } |
46939f8b RW |
699 | |
700 | if (pm->suspend_noirq) { | |
701 | pci_power_t prev = pci_dev->current_state; | |
702 | int error; | |
703 | ||
704 | error = pm->suspend_noirq(dev); | |
705 | suspend_report_result(pm->suspend_noirq, error); | |
706 | if (error) | |
707 | return error; | |
708 | ||
709 | if (!pci_dev->state_saved && pci_dev->current_state != PCI_D0 | |
710 | && pci_dev->current_state != PCI_UNKNOWN) { | |
711 | WARN_ONCE(pci_dev->current_state != prev, | |
712 | "PCI PM: State of device not saved by %pF\n", | |
713 | pm->suspend_noirq); | |
714 | return 0; | |
715 | } | |
bbb44d9f RW |
716 | } |
717 | ||
46939f8b RW |
718 | if (!pci_dev->state_saved) { |
719 | pci_save_state(pci_dev); | |
720 | if (!pci_is_bridge(pci_dev)) | |
721 | pci_prepare_to_sleep(pci_dev); | |
722 | } | |
d67e37d7 | 723 | |
46939f8b RW |
724 | pci_pm_set_unknown_state(pci_dev); |
725 | ||
dbf0e4c7 AS |
726 | /* |
727 | * Some BIOSes from ASUS have a bug: If a USB EHCI host controller's | |
728 | * PCI COMMAND register isn't 0, the BIOS assumes that the controller | |
729 | * hasn't been quiesced and tries to turn it off. If the controller | |
730 | * is already in D3, this can hang or cause memory corruption. | |
731 | * | |
732 | * Since the value of the COMMAND register doesn't matter once the | |
733 | * device has been suspended, we can safely set it to 0 here. | |
734 | */ | |
735 | if (pci_dev->class == PCI_CLASS_SERIAL_USB_EHCI) | |
736 | pci_write_config_word(pci_dev, PCI_COMMAND, 0); | |
737 | ||
46939f8b | 738 | return 0; |
c8958177 | 739 | } |
1da177e4 | 740 | |
f6dc1e5e | 741 | static int pci_pm_resume_noirq(struct device *dev) |
bbb44d9f RW |
742 | { |
743 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
744 | struct device_driver *drv = dev->driver; | |
355a72d7 | 745 | int error = 0; |
bbb44d9f | 746 | |
6cbf8214 | 747 | pci_pm_default_resume_early(pci_dev); |
aa8c6c93 | 748 | |
ad8cfa1d | 749 | if (pci_has_legacy_pm_support(pci_dev)) |
f6dc1e5e | 750 | return pci_legacy_resume_early(dev); |
bb808945 | 751 | |
f6dc1e5e RW |
752 | if (drv && drv->pm && drv->pm->resume_noirq) |
753 | error = drv->pm->resume_noirq(dev); | |
bbb44d9f RW |
754 | |
755 | return error; | |
756 | } | |
757 | ||
f6dc1e5e | 758 | static int pci_pm_resume(struct device *dev) |
bbb44d9f | 759 | { |
355a72d7 | 760 | struct pci_dev *pci_dev = to_pci_dev(dev); |
8150f32b | 761 | const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; |
bbb44d9f RW |
762 | int error = 0; |
763 | ||
418e4da3 RW |
764 | /* |
765 | * This is necessary for the suspend error path in which resume is | |
766 | * called without restoring the standard config registers of the device. | |
767 | */ | |
768 | if (pci_dev->state_saved) | |
769 | pci_restore_standard_config(pci_dev); | |
770 | ||
ad8cfa1d | 771 | if (pci_has_legacy_pm_support(pci_dev)) |
f6dc1e5e | 772 | return pci_legacy_resume(dev); |
bb808945 | 773 | |
5294e256 | 774 | pci_pm_default_resume(pci_dev); |
73410429 | 775 | |
5294e256 RW |
776 | if (pm) { |
777 | if (pm->resume) | |
778 | error = pm->resume(dev); | |
779 | } else { | |
780 | pci_pm_reenable_device(pci_dev); | |
781 | } | |
bbb44d9f | 782 | |
999cce4a | 783 | return error; |
bbb44d9f RW |
784 | } |
785 | ||
786 | #else /* !CONFIG_SUSPEND */ | |
787 | ||
788 | #define pci_pm_suspend NULL | |
789 | #define pci_pm_suspend_noirq NULL | |
790 | #define pci_pm_resume NULL | |
791 | #define pci_pm_resume_noirq NULL | |
792 | ||
793 | #endif /* !CONFIG_SUSPEND */ | |
794 | ||
1f112cee | 795 | #ifdef CONFIG_HIBERNATE_CALLBACKS |
bbb44d9f | 796 | |
699c1985 SO |
797 | |
798 | /* | |
799 | * pcibios_pm_ops - provide arch-specific hooks when a PCI device is doing | |
800 | * a hibernate transition | |
801 | */ | |
802 | struct dev_pm_ops __weak pcibios_pm_ops; | |
803 | ||
bbb44d9f RW |
804 | static int pci_pm_freeze(struct device *dev) |
805 | { | |
806 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
8150f32b | 807 | const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; |
bbb44d9f | 808 | |
ad8cfa1d RW |
809 | if (pci_has_legacy_pm_support(pci_dev)) |
810 | return pci_legacy_suspend(dev, PMSG_FREEZE); | |
bb808945 | 811 | |
5294e256 RW |
812 | if (!pm) { |
813 | pci_pm_default_suspend(pci_dev); | |
814 | return 0; | |
bbb44d9f RW |
815 | } |
816 | ||
7cd0602d RW |
817 | /* |
818 | * This used to be done in pci_pm_prepare() for all devices and some | |
819 | * drivers may depend on it, so do it here. Ideally, runtime-suspended | |
820 | * devices should not be touched during freeze/thaw transitions, | |
821 | * however. | |
822 | */ | |
823 | pm_runtime_resume(dev); | |
824 | ||
82fee4d6 | 825 | pci_dev->state_saved = false; |
5294e256 RW |
826 | if (pm->freeze) { |
827 | int error; | |
828 | ||
829 | error = pm->freeze(dev); | |
830 | suspend_report_result(pm->freeze, error); | |
831 | if (error) | |
832 | return error; | |
833 | } | |
834 | ||
699c1985 SO |
835 | if (pcibios_pm_ops.freeze) |
836 | return pcibios_pm_ops.freeze(dev); | |
837 | ||
5294e256 | 838 | return 0; |
bbb44d9f RW |
839 | } |
840 | ||
841 | static int pci_pm_freeze_noirq(struct device *dev) | |
842 | { | |
355a72d7 | 843 | struct pci_dev *pci_dev = to_pci_dev(dev); |
adf09493 | 844 | struct device_driver *drv = dev->driver; |
bbb44d9f | 845 | |
bb808945 RW |
846 | if (pci_has_legacy_pm_support(pci_dev)) |
847 | return pci_legacy_suspend_late(dev, PMSG_FREEZE); | |
848 | ||
d67e37d7 | 849 | if (drv && drv->pm && drv->pm->freeze_noirq) { |
46939f8b RW |
850 | int error; |
851 | ||
d67e37d7 RW |
852 | error = drv->pm->freeze_noirq(dev); |
853 | suspend_report_result(drv->pm->freeze_noirq, error); | |
46939f8b RW |
854 | if (error) |
855 | return error; | |
bbb44d9f RW |
856 | } |
857 | ||
46939f8b RW |
858 | if (!pci_dev->state_saved) |
859 | pci_save_state(pci_dev); | |
d67e37d7 | 860 | |
46939f8b RW |
861 | pci_pm_set_unknown_state(pci_dev); |
862 | ||
699c1985 SO |
863 | if (pcibios_pm_ops.freeze_noirq) |
864 | return pcibios_pm_ops.freeze_noirq(dev); | |
865 | ||
46939f8b | 866 | return 0; |
bbb44d9f RW |
867 | } |
868 | ||
f6dc1e5e | 869 | static int pci_pm_thaw_noirq(struct device *dev) |
bbb44d9f | 870 | { |
355a72d7 | 871 | struct pci_dev *pci_dev = to_pci_dev(dev); |
bbb44d9f RW |
872 | struct device_driver *drv = dev->driver; |
873 | int error = 0; | |
874 | ||
699c1985 SO |
875 | if (pcibios_pm_ops.thaw_noirq) { |
876 | error = pcibios_pm_ops.thaw_noirq(dev); | |
877 | if (error) | |
878 | return error; | |
879 | } | |
880 | ||
ad8cfa1d | 881 | if (pci_has_legacy_pm_support(pci_dev)) |
f6dc1e5e | 882 | return pci_legacy_resume_early(dev); |
bb808945 | 883 | |
f6dc1e5e | 884 | pci_update_current_state(pci_dev, PCI_D0); |
d67e37d7 | 885 | |
f6dc1e5e RW |
886 | if (drv && drv->pm && drv->pm->thaw_noirq) |
887 | error = drv->pm->thaw_noirq(dev); | |
bbb44d9f RW |
888 | |
889 | return error; | |
890 | } | |
891 | ||
f6dc1e5e | 892 | static int pci_pm_thaw(struct device *dev) |
bbb44d9f | 893 | { |
355a72d7 | 894 | struct pci_dev *pci_dev = to_pci_dev(dev); |
8150f32b | 895 | const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; |
bbb44d9f RW |
896 | int error = 0; |
897 | ||
699c1985 SO |
898 | if (pcibios_pm_ops.thaw) { |
899 | error = pcibios_pm_ops.thaw(dev); | |
900 | if (error) | |
901 | return error; | |
902 | } | |
903 | ||
ad8cfa1d | 904 | if (pci_has_legacy_pm_support(pci_dev)) |
f6dc1e5e | 905 | return pci_legacy_resume(dev); |
bb808945 | 906 | |
5294e256 RW |
907 | if (pm) { |
908 | if (pm->thaw) | |
909 | error = pm->thaw(dev); | |
910 | } else { | |
911 | pci_pm_reenable_device(pci_dev); | |
912 | } | |
bbb44d9f | 913 | |
4b77b0a2 RW |
914 | pci_dev->state_saved = false; |
915 | ||
bbb44d9f RW |
916 | return error; |
917 | } | |
918 | ||
919 | static int pci_pm_poweroff(struct device *dev) | |
920 | { | |
355a72d7 | 921 | struct pci_dev *pci_dev = to_pci_dev(dev); |
8150f32b | 922 | const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; |
bbb44d9f | 923 | |
ad8cfa1d RW |
924 | if (pci_has_legacy_pm_support(pci_dev)) |
925 | return pci_legacy_suspend(dev, PMSG_HIBERNATE); | |
bb808945 | 926 | |
5294e256 RW |
927 | if (!pm) { |
928 | pci_pm_default_suspend(pci_dev); | |
929 | goto Fixup; | |
930 | } | |
931 | ||
7cd0602d RW |
932 | /* The reason to do that is the same as in pci_pm_suspend(). */ |
933 | pm_runtime_resume(dev); | |
934 | ||
82fee4d6 | 935 | pci_dev->state_saved = false; |
5294e256 | 936 | if (pm->poweroff) { |
46939f8b RW |
937 | int error; |
938 | ||
ddb7c9d2 RW |
939 | error = pm->poweroff(dev); |
940 | suspend_report_result(pm->poweroff, error); | |
46939f8b RW |
941 | if (error) |
942 | return error; | |
bbb44d9f RW |
943 | } |
944 | ||
5294e256 RW |
945 | Fixup: |
946 | pci_fixup_device(pci_fixup_suspend, pci_dev); | |
c9b9972b | 947 | |
699c1985 SO |
948 | if (pcibios_pm_ops.poweroff) |
949 | return pcibios_pm_ops.poweroff(dev); | |
950 | ||
46939f8b | 951 | return 0; |
bbb44d9f RW |
952 | } |
953 | ||
954 | static int pci_pm_poweroff_noirq(struct device *dev) | |
955 | { | |
46939f8b | 956 | struct pci_dev *pci_dev = to_pci_dev(dev); |
adf09493 | 957 | struct device_driver *drv = dev->driver; |
bbb44d9f | 958 | |
bb808945 RW |
959 | if (pci_has_legacy_pm_support(to_pci_dev(dev))) |
960 | return pci_legacy_suspend_late(dev, PMSG_HIBERNATE); | |
961 | ||
46939f8b RW |
962 | if (!drv || !drv->pm) |
963 | return 0; | |
964 | ||
965 | if (drv->pm->poweroff_noirq) { | |
966 | int error; | |
967 | ||
d67e37d7 RW |
968 | error = drv->pm->poweroff_noirq(dev); |
969 | suspend_report_result(drv->pm->poweroff_noirq, error); | |
46939f8b RW |
970 | if (error) |
971 | return error; | |
bbb44d9f RW |
972 | } |
973 | ||
46939f8b RW |
974 | if (!pci_dev->state_saved && !pci_is_bridge(pci_dev)) |
975 | pci_prepare_to_sleep(pci_dev); | |
976 | ||
0b68c8e2 RW |
977 | /* |
978 | * The reason for doing this here is the same as for the analogous code | |
979 | * in pci_pm_suspend_noirq(). | |
980 | */ | |
981 | if (pci_dev->class == PCI_CLASS_SERIAL_USB_EHCI) | |
982 | pci_write_config_word(pci_dev, PCI_COMMAND, 0); | |
983 | ||
699c1985 SO |
984 | if (pcibios_pm_ops.poweroff_noirq) |
985 | return pcibios_pm_ops.poweroff_noirq(dev); | |
986 | ||
46939f8b | 987 | return 0; |
bbb44d9f RW |
988 | } |
989 | ||
f6dc1e5e | 990 | static int pci_pm_restore_noirq(struct device *dev) |
bbb44d9f RW |
991 | { |
992 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
993 | struct device_driver *drv = dev->driver; | |
355a72d7 | 994 | int error = 0; |
bbb44d9f | 995 | |
699c1985 SO |
996 | if (pcibios_pm_ops.restore_noirq) { |
997 | error = pcibios_pm_ops.restore_noirq(dev); | |
998 | if (error) | |
999 | return error; | |
1000 | } | |
1001 | ||
6cbf8214 | 1002 | pci_pm_default_resume_early(pci_dev); |
aa8c6c93 | 1003 | |
ad8cfa1d | 1004 | if (pci_has_legacy_pm_support(pci_dev)) |
f6dc1e5e | 1005 | return pci_legacy_resume_early(dev); |
bb808945 | 1006 | |
f6dc1e5e RW |
1007 | if (drv && drv->pm && drv->pm->restore_noirq) |
1008 | error = drv->pm->restore_noirq(dev); | |
bbb44d9f RW |
1009 | |
1010 | return error; | |
1011 | } | |
1012 | ||
f6dc1e5e | 1013 | static int pci_pm_restore(struct device *dev) |
bbb44d9f RW |
1014 | { |
1015 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
8150f32b | 1016 | const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; |
bbb44d9f RW |
1017 | int error = 0; |
1018 | ||
699c1985 SO |
1019 | if (pcibios_pm_ops.restore) { |
1020 | error = pcibios_pm_ops.restore(dev); | |
1021 | if (error) | |
1022 | return error; | |
1023 | } | |
1024 | ||
418e4da3 RW |
1025 | /* |
1026 | * This is necessary for the hibernation error path in which restore is | |
1027 | * called without restoring the standard config registers of the device. | |
1028 | */ | |
1029 | if (pci_dev->state_saved) | |
1030 | pci_restore_standard_config(pci_dev); | |
1031 | ||
ad8cfa1d | 1032 | if (pci_has_legacy_pm_support(pci_dev)) |
f6dc1e5e | 1033 | return pci_legacy_resume(dev); |
bb808945 | 1034 | |
5294e256 | 1035 | pci_pm_default_resume(pci_dev); |
73410429 | 1036 | |
5294e256 RW |
1037 | if (pm) { |
1038 | if (pm->restore) | |
1039 | error = pm->restore(dev); | |
1040 | } else { | |
1041 | pci_pm_reenable_device(pci_dev); | |
1042 | } | |
bbb44d9f RW |
1043 | |
1044 | return error; | |
c8958177 | 1045 | } |
1da177e4 | 1046 | |
1f112cee | 1047 | #else /* !CONFIG_HIBERNATE_CALLBACKS */ |
bbb44d9f RW |
1048 | |
1049 | #define pci_pm_freeze NULL | |
1050 | #define pci_pm_freeze_noirq NULL | |
1051 | #define pci_pm_thaw NULL | |
1052 | #define pci_pm_thaw_noirq NULL | |
1053 | #define pci_pm_poweroff NULL | |
1054 | #define pci_pm_poweroff_noirq NULL | |
1055 | #define pci_pm_restore NULL | |
1056 | #define pci_pm_restore_noirq NULL | |
1057 | ||
1f112cee | 1058 | #endif /* !CONFIG_HIBERNATE_CALLBACKS */ |
bbb44d9f | 1059 | |
6cbf8214 RW |
1060 | #ifdef CONFIG_PM_RUNTIME |
1061 | ||
1062 | static int pci_pm_runtime_suspend(struct device *dev) | |
1063 | { | |
1064 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
1065 | const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; | |
1066 | pci_power_t prev = pci_dev->current_state; | |
1067 | int error; | |
1068 | ||
967577b0 HY |
1069 | /* |
1070 | * If pci_dev->driver is not set (unbound), the device should | |
1071 | * always remain in D0 regardless of the runtime PM status | |
1072 | */ | |
1073 | if (!pci_dev->driver) | |
1074 | return 0; | |
1075 | ||
6cbf8214 RW |
1076 | if (!pm || !pm->runtime_suspend) |
1077 | return -ENOSYS; | |
1078 | ||
82fee4d6 | 1079 | pci_dev->state_saved = false; |
448bd857 | 1080 | pci_dev->no_d3cold = false; |
6cbf8214 RW |
1081 | error = pm->runtime_suspend(dev); |
1082 | suspend_report_result(pm->runtime_suspend, error); | |
1083 | if (error) | |
1084 | return error; | |
448bd857 HY |
1085 | if (!pci_dev->d3cold_allowed) |
1086 | pci_dev->no_d3cold = true; | |
6cbf8214 RW |
1087 | |
1088 | pci_fixup_device(pci_fixup_suspend, pci_dev); | |
1089 | ||
1090 | if (!pci_dev->state_saved && pci_dev->current_state != PCI_D0 | |
1091 | && pci_dev->current_state != PCI_UNKNOWN) { | |
1092 | WARN_ONCE(pci_dev->current_state != prev, | |
1093 | "PCI PM: State of device not saved by %pF\n", | |
1094 | pm->runtime_suspend); | |
1095 | return 0; | |
1096 | } | |
1097 | ||
42eca230 | 1098 | if (!pci_dev->state_saved) { |
6cbf8214 | 1099 | pci_save_state(pci_dev); |
42eca230 DA |
1100 | pci_finish_runtime_suspend(pci_dev); |
1101 | } | |
6cbf8214 RW |
1102 | |
1103 | return 0; | |
1104 | } | |
1105 | ||
1106 | static int pci_pm_runtime_resume(struct device *dev) | |
1107 | { | |
448bd857 | 1108 | int rc; |
6cbf8214 RW |
1109 | struct pci_dev *pci_dev = to_pci_dev(dev); |
1110 | const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; | |
1111 | ||
967577b0 HY |
1112 | /* |
1113 | * If pci_dev->driver is not set (unbound), the device should | |
1114 | * always remain in D0 regardless of the runtime PM status | |
1115 | */ | |
1116 | if (!pci_dev->driver) | |
1117 | return 0; | |
1118 | ||
6cbf8214 RW |
1119 | if (!pm || !pm->runtime_resume) |
1120 | return -ENOSYS; | |
1121 | ||
db288c9c RW |
1122 | pci_restore_standard_config(pci_dev); |
1123 | pci_fixup_device(pci_fixup_resume_early, pci_dev); | |
6cbf8214 RW |
1124 | __pci_enable_wake(pci_dev, PCI_D0, true, false); |
1125 | pci_fixup_device(pci_fixup_resume, pci_dev); | |
1126 | ||
448bd857 HY |
1127 | rc = pm->runtime_resume(dev); |
1128 | ||
1129 | pci_dev->runtime_d3cold = false; | |
1130 | ||
1131 | return rc; | |
6cbf8214 RW |
1132 | } |
1133 | ||
1134 | static int pci_pm_runtime_idle(struct device *dev) | |
1135 | { | |
967577b0 | 1136 | struct pci_dev *pci_dev = to_pci_dev(dev); |
6cbf8214 | 1137 | const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; |
45f0a85c | 1138 | int ret = 0; |
6cbf8214 | 1139 | |
967577b0 HY |
1140 | /* |
1141 | * If pci_dev->driver is not set (unbound), the device should | |
1142 | * always remain in D0 regardless of the runtime PM status | |
1143 | */ | |
1144 | if (!pci_dev->driver) | |
45f0a85c | 1145 | return 0; |
967577b0 | 1146 | |
6cbf8214 RW |
1147 | if (!pm) |
1148 | return -ENOSYS; | |
1149 | ||
45f0a85c RW |
1150 | if (pm->runtime_idle) |
1151 | ret = pm->runtime_idle(dev); | |
6cbf8214 | 1152 | |
45f0a85c | 1153 | return ret; |
6cbf8214 RW |
1154 | } |
1155 | ||
1156 | #else /* !CONFIG_PM_RUNTIME */ | |
1157 | ||
1158 | #define pci_pm_runtime_suspend NULL | |
1159 | #define pci_pm_runtime_resume NULL | |
1160 | #define pci_pm_runtime_idle NULL | |
1161 | ||
1162 | #endif /* !CONFIG_PM_RUNTIME */ | |
1163 | ||
aa338601 | 1164 | #ifdef CONFIG_PM |
6cbf8214 | 1165 | |
f91da04d | 1166 | static const struct dev_pm_ops pci_dev_pm_ops = { |
adf09493 | 1167 | .prepare = pci_pm_prepare, |
adf09493 RW |
1168 | .suspend = pci_pm_suspend, |
1169 | .resume = pci_pm_resume, | |
1170 | .freeze = pci_pm_freeze, | |
1171 | .thaw = pci_pm_thaw, | |
1172 | .poweroff = pci_pm_poweroff, | |
1173 | .restore = pci_pm_restore, | |
bbb44d9f RW |
1174 | .suspend_noirq = pci_pm_suspend_noirq, |
1175 | .resume_noirq = pci_pm_resume_noirq, | |
1176 | .freeze_noirq = pci_pm_freeze_noirq, | |
1177 | .thaw_noirq = pci_pm_thaw_noirq, | |
1178 | .poweroff_noirq = pci_pm_poweroff_noirq, | |
1179 | .restore_noirq = pci_pm_restore_noirq, | |
6cbf8214 RW |
1180 | .runtime_suspend = pci_pm_runtime_suspend, |
1181 | .runtime_resume = pci_pm_runtime_resume, | |
1182 | .runtime_idle = pci_pm_runtime_idle, | |
bbb44d9f RW |
1183 | }; |
1184 | ||
adf09493 | 1185 | #define PCI_PM_OPS_PTR (&pci_dev_pm_ops) |
bbb44d9f | 1186 | |
6cbf8214 | 1187 | #else /* !COMFIG_PM_OPS */ |
bbb44d9f RW |
1188 | |
1189 | #define PCI_PM_OPS_PTR NULL | |
1190 | ||
6cbf8214 | 1191 | #endif /* !COMFIG_PM_OPS */ |
bbb44d9f | 1192 | |
1da177e4 | 1193 | /** |
863b18f4 | 1194 | * __pci_register_driver - register a new pci driver |
1da177e4 | 1195 | * @drv: the driver structure to register |
863b18f4 | 1196 | * @owner: owner module of drv |
f95d882d | 1197 | * @mod_name: module name string |
f7625980 | 1198 | * |
1da177e4 | 1199 | * Adds the driver structure to the list of registered drivers. |
f7625980 BH |
1200 | * Returns a negative value on error, otherwise 0. |
1201 | * If no error occurred, the driver remains registered even if | |
1da177e4 LT |
1202 | * no device was claimed during registration. |
1203 | */ | |
725522b5 GKH |
1204 | int __pci_register_driver(struct pci_driver *drv, struct module *owner, |
1205 | const char *mod_name) | |
1da177e4 | 1206 | { |
1da177e4 LT |
1207 | /* initialize common driver fields */ |
1208 | drv->driver.name = drv->name; | |
1209 | drv->driver.bus = &pci_bus_type; | |
863b18f4 | 1210 | drv->driver.owner = owner; |
725522b5 | 1211 | drv->driver.mod_name = mod_name; |
50b00755 | 1212 | |
75865858 GKH |
1213 | spin_lock_init(&drv->dynids.lock); |
1214 | INIT_LIST_HEAD(&drv->dynids.list); | |
1da177e4 LT |
1215 | |
1216 | /* register with core */ | |
bfb09a86 | 1217 | return driver_register(&drv->driver); |
1da177e4 LT |
1218 | } |
1219 | ||
1220 | /** | |
1221 | * pci_unregister_driver - unregister a pci driver | |
1222 | * @drv: the driver structure to unregister | |
f7625980 | 1223 | * |
1da177e4 LT |
1224 | * Deletes the driver structure from the list of registered PCI drivers, |
1225 | * gives it a chance to clean up by calling its remove() function for | |
1226 | * each device it was responsible for, and marks those devices as | |
1227 | * driverless. | |
1228 | */ | |
1229 | ||
1230 | void | |
1231 | pci_unregister_driver(struct pci_driver *drv) | |
1232 | { | |
1233 | driver_unregister(&drv->driver); | |
1234 | pci_free_dynids(drv); | |
1235 | } | |
1236 | ||
1237 | static struct pci_driver pci_compat_driver = { | |
1238 | .name = "compat" | |
1239 | }; | |
1240 | ||
1241 | /** | |
1242 | * pci_dev_driver - get the pci_driver of a device | |
1243 | * @dev: the device to query | |
1244 | * | |
f7625980 | 1245 | * Returns the appropriate pci_driver structure or %NULL if there is no |
1da177e4 LT |
1246 | * registered driver for the device. |
1247 | */ | |
1248 | struct pci_driver * | |
1249 | pci_dev_driver(const struct pci_dev *dev) | |
1250 | { | |
1251 | if (dev->driver) | |
1252 | return dev->driver; | |
1253 | else { | |
1254 | int i; | |
1255 | for(i=0; i<=PCI_ROM_RESOURCE; i++) | |
1256 | if (dev->resource[i].flags & IORESOURCE_BUSY) | |
1257 | return &pci_compat_driver; | |
1258 | } | |
1259 | return NULL; | |
1260 | } | |
1261 | ||
1262 | /** | |
1263 | * pci_bus_match - Tell if a PCI device structure has a matching PCI device id structure | |
1da177e4 | 1264 | * @dev: the PCI device structure to match against |
8f7020d3 | 1265 | * @drv: the device driver to search for matching PCI device id structures |
f7625980 | 1266 | * |
1da177e4 | 1267 | * Used by a driver to check whether a PCI device present in the |
8f7020d3 | 1268 | * system is in its list of supported devices. Returns the matching |
1da177e4 LT |
1269 | * pci_device_id structure or %NULL if there is no match. |
1270 | */ | |
75865858 | 1271 | static int pci_bus_match(struct device *dev, struct device_driver *drv) |
1da177e4 | 1272 | { |
75865858 | 1273 | struct pci_dev *pci_dev = to_pci_dev(dev); |
58d9a38f | 1274 | struct pci_driver *pci_drv; |
1da177e4 LT |
1275 | const struct pci_device_id *found_id; |
1276 | ||
58d9a38f YL |
1277 | if (!pci_dev->match_driver) |
1278 | return 0; | |
1279 | ||
1280 | pci_drv = to_pci_driver(drv); | |
75865858 | 1281 | found_id = pci_match_device(pci_drv, pci_dev); |
1da177e4 LT |
1282 | if (found_id) |
1283 | return 1; | |
1284 | ||
75865858 | 1285 | return 0; |
1da177e4 LT |
1286 | } |
1287 | ||
1288 | /** | |
1289 | * pci_dev_get - increments the reference count of the pci device structure | |
1290 | * @dev: the device being referenced | |
1291 | * | |
1292 | * Each live reference to a device should be refcounted. | |
1293 | * | |
1294 | * Drivers for PCI devices should normally record such references in | |
1295 | * their probe() methods, when they bind to a device, and release | |
1296 | * them by calling pci_dev_put(), in their disconnect() methods. | |
1297 | * | |
1298 | * A pointer to the device with the incremented reference counter is returned. | |
1299 | */ | |
1300 | struct pci_dev *pci_dev_get(struct pci_dev *dev) | |
1301 | { | |
1302 | if (dev) | |
1303 | get_device(&dev->dev); | |
1304 | return dev; | |
1305 | } | |
1306 | ||
1307 | /** | |
1308 | * pci_dev_put - release a use of the pci device structure | |
1309 | * @dev: device that's been disconnected | |
1310 | * | |
1311 | * Must be called when a user of a device is finished with it. When the last | |
1312 | * user of the device calls this function, the memory of the device is freed. | |
1313 | */ | |
1314 | void pci_dev_put(struct pci_dev *dev) | |
1315 | { | |
1316 | if (dev) | |
1317 | put_device(&dev->dev); | |
1318 | } | |
1319 | ||
8ccc9aa1 BP |
1320 | static int pci_uevent(struct device *dev, struct kobj_uevent_env *env) |
1321 | { | |
1322 | struct pci_dev *pdev; | |
1323 | ||
1324 | if (!dev) | |
1325 | return -ENODEV; | |
1326 | ||
1327 | pdev = to_pci_dev(dev); | |
1328 | if (!pdev) | |
1329 | return -ENODEV; | |
1330 | ||
1331 | if (add_uevent_var(env, "PCI_CLASS=%04X", pdev->class)) | |
1332 | return -ENOMEM; | |
1333 | ||
1334 | if (add_uevent_var(env, "PCI_ID=%04X:%04X", pdev->vendor, pdev->device)) | |
1335 | return -ENOMEM; | |
1336 | ||
1337 | if (add_uevent_var(env, "PCI_SUBSYS_ID=%04X:%04X", pdev->subsystem_vendor, | |
1338 | pdev->subsystem_device)) | |
1339 | return -ENOMEM; | |
1340 | ||
1341 | if (add_uevent_var(env, "PCI_SLOT_NAME=%s", pci_name(pdev))) | |
1342 | return -ENOMEM; | |
1343 | ||
1344 | if (add_uevent_var(env, "MODALIAS=pci:v%08Xd%08Xsv%08Xsd%08Xbc%02Xsc%02Xi%02x", | |
1345 | pdev->vendor, pdev->device, | |
1346 | pdev->subsystem_vendor, pdev->subsystem_device, | |
1347 | (u8)(pdev->class >> 16), (u8)(pdev->class >> 8), | |
1348 | (u8)(pdev->class))) | |
1349 | return -ENOMEM; | |
1350 | return 0; | |
1351 | } | |
1352 | ||
1da177e4 LT |
1353 | struct bus_type pci_bus_type = { |
1354 | .name = "pci", | |
1355 | .match = pci_bus_match, | |
312c004d | 1356 | .uevent = pci_uevent, |
b15d686a RK |
1357 | .probe = pci_device_probe, |
1358 | .remove = pci_device_remove, | |
cbd69dbb | 1359 | .shutdown = pci_device_shutdown, |
5136b2da | 1360 | .dev_groups = pci_dev_groups, |
0f49ba55 | 1361 | .bus_groups = pci_bus_groups, |
2229c1fb | 1362 | .drv_groups = pci_drv_groups, |
bbb44d9f | 1363 | .pm = PCI_PM_OPS_PTR, |
1da177e4 LT |
1364 | }; |
1365 | ||
1366 | static int __init pci_driver_init(void) | |
1367 | { | |
1368 | return bus_register(&pci_bus_type); | |
1369 | } | |
1370 | ||
1371 | postcore_initcall(pci_driver_init); | |
1372 | ||
9dba910e | 1373 | EXPORT_SYMBOL_GPL(pci_add_dynid); |
75865858 | 1374 | EXPORT_SYMBOL(pci_match_id); |
863b18f4 | 1375 | EXPORT_SYMBOL(__pci_register_driver); |
1da177e4 LT |
1376 | EXPORT_SYMBOL(pci_unregister_driver); |
1377 | EXPORT_SYMBOL(pci_dev_driver); | |
1378 | EXPORT_SYMBOL(pci_bus_type); | |
1379 | EXPORT_SYMBOL(pci_dev_get); | |
1380 | EXPORT_SYMBOL(pci_dev_put); |