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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> |
1da177e4 LT |
20 | #include "pci.h" |
21 | ||
1da177e4 LT |
22 | /* |
23 | * Dynamic device IDs are disabled for !CONFIG_HOTPLUG | |
24 | */ | |
25 | ||
75865858 GKH |
26 | struct pci_dynid { |
27 | struct list_head node; | |
28 | struct pci_device_id id; | |
29 | }; | |
1da177e4 | 30 | |
3d3c2ae1 GKH |
31 | #ifdef CONFIG_HOTPLUG |
32 | ||
1da177e4 | 33 | /** |
8f7020d3 RD |
34 | * store_new_id - add a new PCI device ID to this driver and re-probe devices |
35 | * @driver: target device driver | |
36 | * @buf: buffer for scanning device ID data | |
37 | * @count: input size | |
1da177e4 LT |
38 | * |
39 | * Adds a new dynamic pci device ID to this driver, | |
40 | * and causes the driver to probe for all devices again. | |
41 | */ | |
f8eb1005 | 42 | static ssize_t |
1da177e4 LT |
43 | store_new_id(struct device_driver *driver, const char *buf, size_t count) |
44 | { | |
75865858 | 45 | struct pci_dynid *dynid; |
1da177e4 | 46 | struct pci_driver *pdrv = to_pci_driver(driver); |
b41d6cf3 | 47 | const struct pci_device_id *ids = pdrv->id_table; |
6ba18636 | 48 | __u32 vendor, device, subvendor=PCI_ANY_ID, |
1da177e4 LT |
49 | subdevice=PCI_ANY_ID, class=0, class_mask=0; |
50 | unsigned long driver_data=0; | |
51 | int fields=0; | |
2debb4d2 | 52 | int retval=0; |
1da177e4 | 53 | |
b41d6cf3 | 54 | fields = sscanf(buf, "%x %x %x %x %x %x %lx", |
1da177e4 LT |
55 | &vendor, &device, &subvendor, &subdevice, |
56 | &class, &class_mask, &driver_data); | |
6ba18636 | 57 | if (fields < 2) |
1da177e4 LT |
58 | return -EINVAL; |
59 | ||
b41d6cf3 JD |
60 | /* Only accept driver_data values that match an existing id_table |
61 | entry */ | |
2debb4d2 CW |
62 | if (ids) { |
63 | retval = -EINVAL; | |
64 | while (ids->vendor || ids->subvendor || ids->class_mask) { | |
65 | if (driver_data == ids->driver_data) { | |
66 | retval = 0; | |
67 | break; | |
68 | } | |
69 | ids++; | |
b41d6cf3 | 70 | } |
2debb4d2 CW |
71 | if (retval) /* No match */ |
72 | return retval; | |
b41d6cf3 | 73 | } |
b41d6cf3 | 74 | |
f5afe806 | 75 | dynid = kzalloc(sizeof(*dynid), GFP_KERNEL); |
1da177e4 LT |
76 | if (!dynid) |
77 | return -ENOMEM; | |
78 | ||
1da177e4 LT |
79 | dynid->id.vendor = vendor; |
80 | dynid->id.device = device; | |
81 | dynid->id.subvendor = subvendor; | |
82 | dynid->id.subdevice = subdevice; | |
83 | dynid->id.class = class; | |
84 | dynid->id.class_mask = class_mask; | |
edbc25ca | 85 | dynid->id.driver_data = driver_data; |
1da177e4 LT |
86 | |
87 | spin_lock(&pdrv->dynids.lock); | |
a56bc69a | 88 | list_add_tail(&dynid->node, &pdrv->dynids.list); |
1da177e4 LT |
89 | spin_unlock(&pdrv->dynids.lock); |
90 | ||
75865858 | 91 | if (get_driver(&pdrv->driver)) { |
b19441af | 92 | retval = driver_attach(&pdrv->driver); |
75865858 | 93 | put_driver(&pdrv->driver); |
1da177e4 LT |
94 | } |
95 | ||
b19441af GKH |
96 | if (retval) |
97 | return retval; | |
1da177e4 LT |
98 | return count; |
99 | } | |
1da177e4 | 100 | static DRIVER_ATTR(new_id, S_IWUSR, NULL, store_new_id); |
1da177e4 | 101 | |
0994375e CW |
102 | /** |
103 | * store_remove_id - remove a PCI device ID from this driver | |
104 | * @driver: target device driver | |
105 | * @buf: buffer for scanning device ID data | |
106 | * @count: input size | |
107 | * | |
108 | * Removes a dynamic pci device ID to this driver. | |
109 | */ | |
110 | static ssize_t | |
111 | store_remove_id(struct device_driver *driver, const char *buf, size_t count) | |
112 | { | |
113 | struct pci_dynid *dynid, *n; | |
114 | struct pci_driver *pdrv = to_pci_driver(driver); | |
115 | __u32 vendor, device, subvendor = PCI_ANY_ID, | |
116 | subdevice = PCI_ANY_ID, class = 0, class_mask = 0; | |
117 | int fields = 0; | |
118 | int retval = -ENODEV; | |
119 | ||
120 | fields = sscanf(buf, "%x %x %x %x %x %x", | |
121 | &vendor, &device, &subvendor, &subdevice, | |
122 | &class, &class_mask); | |
123 | if (fields < 2) | |
124 | return -EINVAL; | |
125 | ||
126 | spin_lock(&pdrv->dynids.lock); | |
127 | list_for_each_entry_safe(dynid, n, &pdrv->dynids.list, node) { | |
128 | struct pci_device_id *id = &dynid->id; | |
129 | if ((id->vendor == vendor) && | |
130 | (id->device == device) && | |
131 | (subvendor == PCI_ANY_ID || id->subvendor == subvendor) && | |
132 | (subdevice == PCI_ANY_ID || id->subdevice == subdevice) && | |
133 | !((id->class ^ class) & class_mask)) { | |
134 | list_del(&dynid->node); | |
135 | kfree(dynid); | |
136 | retval = 0; | |
137 | break; | |
138 | } | |
139 | } | |
140 | spin_unlock(&pdrv->dynids.lock); | |
141 | ||
142 | if (retval) | |
143 | return retval; | |
144 | return count; | |
145 | } | |
146 | static DRIVER_ATTR(remove_id, S_IWUSR, NULL, store_remove_id); | |
147 | ||
1da177e4 LT |
148 | static void |
149 | pci_free_dynids(struct pci_driver *drv) | |
150 | { | |
75865858 | 151 | struct pci_dynid *dynid, *n; |
1da177e4 LT |
152 | |
153 | spin_lock(&drv->dynids.lock); | |
75865858 | 154 | list_for_each_entry_safe(dynid, n, &drv->dynids.list, node) { |
1da177e4 LT |
155 | list_del(&dynid->node); |
156 | kfree(dynid); | |
157 | } | |
158 | spin_unlock(&drv->dynids.lock); | |
159 | } | |
160 | ||
161 | static int | |
162 | pci_create_newid_file(struct pci_driver *drv) | |
163 | { | |
164 | int error = 0; | |
165 | if (drv->probe != NULL) | |
03d43b19 | 166 | error = driver_create_file(&drv->driver, &driver_attr_new_id); |
1da177e4 LT |
167 | return error; |
168 | } | |
169 | ||
03d43b19 GKH |
170 | static void pci_remove_newid_file(struct pci_driver *drv) |
171 | { | |
172 | driver_remove_file(&drv->driver, &driver_attr_new_id); | |
173 | } | |
0994375e CW |
174 | |
175 | static int | |
176 | pci_create_removeid_file(struct pci_driver *drv) | |
177 | { | |
178 | int error = 0; | |
179 | if (drv->probe != NULL) | |
180 | error = driver_create_file(&drv->driver,&driver_attr_remove_id); | |
181 | return error; | |
182 | } | |
183 | ||
184 | static void pci_remove_removeid_file(struct pci_driver *drv) | |
185 | { | |
186 | driver_remove_file(&drv->driver, &driver_attr_remove_id); | |
187 | } | |
1da177e4 | 188 | #else /* !CONFIG_HOTPLUG */ |
1da177e4 LT |
189 | static inline void pci_free_dynids(struct pci_driver *drv) {} |
190 | static inline int pci_create_newid_file(struct pci_driver *drv) | |
191 | { | |
192 | return 0; | |
193 | } | |
03d43b19 | 194 | static inline void pci_remove_newid_file(struct pci_driver *drv) {} |
0994375e CW |
195 | static inline int pci_create_removeid_file(struct pci_driver *drv) |
196 | { | |
197 | return 0; | |
198 | } | |
199 | static inline void pci_remove_removeid_file(struct pci_driver *drv) {} | |
1da177e4 LT |
200 | #endif |
201 | ||
202 | /** | |
75865858 | 203 | * pci_match_id - See if a pci device matches a given pci_id table |
1da177e4 | 204 | * @ids: array of PCI device id structures to search in |
75865858 GKH |
205 | * @dev: the PCI device structure to match against. |
206 | * | |
1da177e4 | 207 | * Used by a driver to check whether a PCI device present in the |
75865858 | 208 | * system is in its list of supported devices. Returns the matching |
1da177e4 | 209 | * pci_device_id structure or %NULL if there is no match. |
75865858 | 210 | * |
8b60756a | 211 | * Deprecated, don't use this as it will not catch any dynamic ids |
75865858 | 212 | * that a driver might want to check for. |
1da177e4 | 213 | */ |
75865858 GKH |
214 | const struct pci_device_id *pci_match_id(const struct pci_device_id *ids, |
215 | struct pci_dev *dev) | |
1da177e4 | 216 | { |
75865858 GKH |
217 | if (ids) { |
218 | while (ids->vendor || ids->subvendor || ids->class_mask) { | |
219 | if (pci_match_one_device(ids, dev)) | |
220 | return ids; | |
221 | ids++; | |
222 | } | |
1da177e4 LT |
223 | } |
224 | return NULL; | |
225 | } | |
226 | ||
227 | /** | |
ae9608af | 228 | * pci_match_device - Tell if a PCI device structure has a matching PCI device id structure |
75865858 | 229 | * @drv: the PCI driver to match against |
39ba487f | 230 | * @dev: the PCI device structure to match against |
75865858 GKH |
231 | * |
232 | * Used by a driver to check whether a PCI device present in the | |
233 | * system is in its list of supported devices. Returns the matching | |
234 | * pci_device_id structure or %NULL if there is no match. | |
1da177e4 | 235 | */ |
d73460d7 AB |
236 | static const struct pci_device_id *pci_match_device(struct pci_driver *drv, |
237 | struct pci_dev *dev) | |
75865858 | 238 | { |
75865858 | 239 | struct pci_dynid *dynid; |
1da177e4 | 240 | |
7461b60a | 241 | /* Look at the dynamic ids first, before the static ones */ |
75865858 GKH |
242 | spin_lock(&drv->dynids.lock); |
243 | list_for_each_entry(dynid, &drv->dynids.list, node) { | |
244 | if (pci_match_one_device(&dynid->id, dev)) { | |
245 | spin_unlock(&drv->dynids.lock); | |
246 | return &dynid->id; | |
247 | } | |
1da177e4 | 248 | } |
75865858 | 249 | spin_unlock(&drv->dynids.lock); |
7461b60a RK |
250 | |
251 | return pci_match_id(drv->id_table, dev); | |
1da177e4 LT |
252 | } |
253 | ||
873392ca RR |
254 | struct drv_dev_and_id { |
255 | struct pci_driver *drv; | |
256 | struct pci_dev *dev; | |
257 | const struct pci_device_id *id; | |
258 | }; | |
259 | ||
260 | static long local_pci_probe(void *_ddi) | |
261 | { | |
262 | struct drv_dev_and_id *ddi = _ddi; | |
263 | ||
264 | return ddi->drv->probe(ddi->dev, ddi->id); | |
265 | } | |
266 | ||
d42c6997 AK |
267 | static int pci_call_probe(struct pci_driver *drv, struct pci_dev *dev, |
268 | const struct pci_device_id *id) | |
269 | { | |
873392ca RR |
270 | int error, node; |
271 | struct drv_dev_and_id ddi = { drv, dev, id }; | |
272 | ||
273 | /* Execute driver initialization on node where the device's | |
274 | bus is attached to. This way the driver likely allocates | |
275 | its local memory on the right node without any need to | |
276 | change it. */ | |
277 | node = dev_to_node(&dev->dev); | |
f70316da | 278 | if (node >= 0) { |
873392ca | 279 | int cpu; |
f70316da | 280 | node_to_cpumask_ptr(nodecpumask, node); |
873392ca RR |
281 | |
282 | get_online_cpus(); | |
283 | cpu = cpumask_any_and(nodecpumask, cpu_online_mask); | |
284 | if (cpu < nr_cpu_ids) | |
285 | error = work_on_cpu(cpu, local_pci_probe, &ddi); | |
286 | else | |
287 | error = local_pci_probe(&ddi); | |
288 | put_online_cpus(); | |
289 | } else | |
290 | error = local_pci_probe(&ddi); | |
d42c6997 AK |
291 | return error; |
292 | } | |
293 | ||
1da177e4 LT |
294 | /** |
295 | * __pci_device_probe() | |
8f7020d3 RD |
296 | * @drv: driver to call to check if it wants the PCI device |
297 | * @pci_dev: PCI device being probed | |
1da177e4 | 298 | * |
8f7020d3 | 299 | * returns 0 on success, else error. |
1da177e4 LT |
300 | * side-effect: pci_dev->driver is set to drv when drv claims pci_dev. |
301 | */ | |
302 | static int | |
303 | __pci_device_probe(struct pci_driver *drv, struct pci_dev *pci_dev) | |
75865858 GKH |
304 | { |
305 | const struct pci_device_id *id; | |
1da177e4 LT |
306 | int error = 0; |
307 | ||
308 | if (!pci_dev->driver && drv->probe) { | |
75865858 GKH |
309 | error = -ENODEV; |
310 | ||
311 | id = pci_match_device(drv, pci_dev); | |
312 | if (id) | |
d42c6997 | 313 | error = pci_call_probe(drv, pci_dev, id); |
75865858 GKH |
314 | if (error >= 0) { |
315 | pci_dev->driver = drv; | |
316 | error = 0; | |
317 | } | |
1da177e4 LT |
318 | } |
319 | return error; | |
320 | } | |
321 | ||
322 | static int pci_device_probe(struct device * dev) | |
323 | { | |
324 | int error = 0; | |
325 | struct pci_driver *drv; | |
326 | struct pci_dev *pci_dev; | |
327 | ||
328 | drv = to_pci_driver(dev->driver); | |
329 | pci_dev = to_pci_dev(dev); | |
330 | pci_dev_get(pci_dev); | |
331 | error = __pci_device_probe(drv, pci_dev); | |
332 | if (error) | |
333 | pci_dev_put(pci_dev); | |
334 | ||
335 | return error; | |
336 | } | |
337 | ||
338 | static int pci_device_remove(struct device * dev) | |
339 | { | |
340 | struct pci_dev * pci_dev = to_pci_dev(dev); | |
341 | struct pci_driver * drv = pci_dev->driver; | |
342 | ||
343 | if (drv) { | |
344 | if (drv->remove) | |
345 | drv->remove(pci_dev); | |
346 | pci_dev->driver = NULL; | |
347 | } | |
348 | ||
2449e06a SL |
349 | /* |
350 | * If the device is still on, set the power state as "unknown", | |
351 | * since it might change by the next time we load the driver. | |
352 | */ | |
353 | if (pci_dev->current_state == PCI_D0) | |
354 | pci_dev->current_state = PCI_UNKNOWN; | |
355 | ||
1da177e4 LT |
356 | /* |
357 | * We would love to complain here if pci_dev->is_enabled is set, that | |
358 | * the driver should have called pci_disable_device(), but the | |
359 | * unfortunate fact is there are too many odd BIOS and bridge setups | |
360 | * that don't like drivers doing that all of the time. | |
361 | * Oh well, we can dream of sane hardware when we sleep, no matter how | |
362 | * horrible the crap we have to deal with is when we are awake... | |
363 | */ | |
364 | ||
365 | pci_dev_put(pci_dev); | |
366 | return 0; | |
367 | } | |
368 | ||
bbb44d9f RW |
369 | static void pci_device_shutdown(struct device *dev) |
370 | { | |
371 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
372 | struct pci_driver *drv = pci_dev->driver; | |
373 | ||
374 | if (drv && drv->shutdown) | |
375 | drv->shutdown(pci_dev); | |
376 | pci_msi_shutdown(pci_dev); | |
377 | pci_msix_shutdown(pci_dev); | |
378 | } | |
379 | ||
380 | #ifdef CONFIG_PM_SLEEP | |
381 | ||
fa58d305 RW |
382 | /* |
383 | * Default "suspend" method for devices that have no driver provided suspend, | |
384 | * or not even a driver at all (second part). | |
bbb44d9f | 385 | */ |
bb808945 | 386 | static void pci_pm_set_unknown_state(struct pci_dev *pci_dev) |
bbb44d9f | 387 | { |
bbb44d9f RW |
388 | /* |
389 | * mark its power state as "unknown", since we don't know if | |
390 | * e.g. the BIOS will change its device state when we suspend. | |
391 | */ | |
392 | if (pci_dev->current_state == PCI_D0) | |
393 | pci_dev->current_state = PCI_UNKNOWN; | |
394 | } | |
395 | ||
355a72d7 RW |
396 | /* |
397 | * Default "resume" method for devices that have no driver provided resume, | |
398 | * or not even a driver at all (second part). | |
399 | */ | |
bb808945 | 400 | static int pci_pm_reenable_device(struct pci_dev *pci_dev) |
355a72d7 RW |
401 | { |
402 | int retval; | |
403 | ||
bbb44d9f RW |
404 | /* if the device was enabled before suspend, reenable */ |
405 | retval = pci_reenable_device(pci_dev); | |
406 | /* | |
407 | * if the device was busmaster before the suspend, make it busmaster | |
408 | * again | |
409 | */ | |
410 | if (pci_dev->is_busmaster) | |
411 | pci_set_master(pci_dev); | |
412 | ||
413 | return retval; | |
414 | } | |
415 | ||
416 | static int pci_legacy_suspend(struct device *dev, pm_message_t state) | |
1da177e4 LT |
417 | { |
418 | struct pci_dev * pci_dev = to_pci_dev(dev); | |
419 | struct pci_driver * drv = pci_dev->driver; | |
420 | int i = 0; | |
421 | ||
02669492 | 422 | if (drv && drv->suspend) { |
99dadce8 RW |
423 | pci_power_t prev = pci_dev->current_state; |
424 | ||
aa8c6c93 RW |
425 | pci_dev->state_saved = false; |
426 | ||
1da177e4 | 427 | i = drv->suspend(pci_dev, state); |
02669492 | 428 | suspend_report_result(drv->suspend, i); |
aa8c6c93 RW |
429 | if (i) |
430 | return i; | |
431 | ||
432 | if (pci_dev->state_saved) | |
433 | goto Fixup; | |
434 | ||
99dadce8 RW |
435 | if (pci_dev->current_state != PCI_D0 |
436 | && pci_dev->current_state != PCI_UNKNOWN) { | |
437 | WARN_ONCE(pci_dev->current_state != prev, | |
438 | "PCI PM: Device state not saved by %pF\n", | |
439 | drv->suspend); | |
aa8c6c93 | 440 | goto Fixup; |
99dadce8 | 441 | } |
02669492 | 442 | } |
ad8cfa1d | 443 | |
aa8c6c93 RW |
444 | pci_save_state(pci_dev); |
445 | /* | |
446 | * This is for compatibility with existing code with legacy PM support. | |
447 | */ | |
448 | pci_pm_set_unknown_state(pci_dev); | |
449 | ||
450 | Fixup: | |
ad8cfa1d RW |
451 | pci_fixup_device(pci_fixup_suspend, pci_dev); |
452 | ||
1da177e4 LT |
453 | return i; |
454 | } | |
455 | ||
bbb44d9f | 456 | static int pci_legacy_suspend_late(struct device *dev, pm_message_t state) |
cbd69dbb LT |
457 | { |
458 | struct pci_dev * pci_dev = to_pci_dev(dev); | |
459 | struct pci_driver * drv = pci_dev->driver; | |
460 | int i = 0; | |
461 | ||
462 | if (drv && drv->suspend_late) { | |
463 | i = drv->suspend_late(pci_dev, state); | |
464 | suspend_report_result(drv->suspend_late, i); | |
465 | } | |
466 | return i; | |
467 | } | |
1da177e4 | 468 | |
f6dc1e5e RW |
469 | static int pci_legacy_resume_early(struct device *dev) |
470 | { | |
f6dc1e5e RW |
471 | struct pci_dev * pci_dev = to_pci_dev(dev); |
472 | struct pci_driver * drv = pci_dev->driver; | |
473 | ||
aa8c6c93 RW |
474 | return drv && drv->resume_early ? |
475 | drv->resume_early(pci_dev) : 0; | |
f6dc1e5e RW |
476 | } |
477 | ||
bbb44d9f | 478 | static int pci_legacy_resume(struct device *dev) |
1da177e4 LT |
479 | { |
480 | struct pci_dev * pci_dev = to_pci_dev(dev); | |
481 | struct pci_driver * drv = pci_dev->driver; | |
482 | ||
ad8cfa1d RW |
483 | pci_fixup_device(pci_fixup_resume, pci_dev); |
484 | ||
aa8c6c93 RW |
485 | return drv && drv->resume ? |
486 | drv->resume(pci_dev) : pci_pm_reenable_device(pci_dev); | |
1da177e4 LT |
487 | } |
488 | ||
571ff758 RW |
489 | /* Auxiliary functions used by the new power management framework */ |
490 | ||
73410429 RW |
491 | static void pci_pm_default_resume_noirq(struct pci_dev *pci_dev) |
492 | { | |
aa8c6c93 | 493 | pci_restore_standard_config(pci_dev); |
418e4da3 | 494 | pci_dev->state_saved = false; |
aa8c6c93 | 495 | pci_fixup_device(pci_fixup_resume_early, pci_dev); |
73410429 RW |
496 | } |
497 | ||
5294e256 | 498 | static void pci_pm_default_resume(struct pci_dev *pci_dev) |
571ff758 | 499 | { |
73410429 RW |
500 | pci_fixup_device(pci_fixup_resume, pci_dev); |
501 | ||
5294e256 RW |
502 | if (!pci_is_bridge(pci_dev)) |
503 | pci_enable_wake(pci_dev, PCI_D0, false); | |
571ff758 RW |
504 | } |
505 | ||
5294e256 | 506 | static void pci_pm_default_suspend(struct pci_dev *pci_dev) |
73410429 | 507 | { |
5294e256 | 508 | /* Disable non-bridge devices without PM support */ |
cbbc2f6b RW |
509 | if (!pci_is_bridge(pci_dev)) |
510 | pci_disable_enabled_device(pci_dev); | |
73410429 RW |
511 | pci_save_state(pci_dev); |
512 | } | |
513 | ||
07e836e8 RW |
514 | static bool pci_has_legacy_pm_support(struct pci_dev *pci_dev) |
515 | { | |
516 | struct pci_driver *drv = pci_dev->driver; | |
bb808945 | 517 | bool ret = drv && (drv->suspend || drv->suspend_late || drv->resume |
07e836e8 | 518 | || drv->resume_early); |
bb808945 RW |
519 | |
520 | /* | |
521 | * Legacy PM support is used by default, so warn if the new framework is | |
522 | * supported as well. Drivers are supposed to support either the | |
523 | * former, or the latter, but not both at the same time. | |
524 | */ | |
525 | WARN_ON(ret && drv->driver.pm); | |
526 | ||
527 | return ret; | |
07e836e8 RW |
528 | } |
529 | ||
571ff758 RW |
530 | /* New power management framework */ |
531 | ||
bbb44d9f RW |
532 | static int pci_pm_prepare(struct device *dev) |
533 | { | |
534 | struct device_driver *drv = dev->driver; | |
535 | int error = 0; | |
536 | ||
537 | if (drv && drv->pm && drv->pm->prepare) | |
538 | error = drv->pm->prepare(dev); | |
539 | ||
540 | return error; | |
541 | } | |
542 | ||
543 | static void pci_pm_complete(struct device *dev) | |
544 | { | |
545 | struct device_driver *drv = dev->driver; | |
546 | ||
547 | if (drv && drv->pm && drv->pm->complete) | |
548 | drv->pm->complete(dev); | |
549 | } | |
550 | ||
551 | #ifdef CONFIG_SUSPEND | |
552 | ||
553 | static int pci_pm_suspend(struct device *dev) | |
554 | { | |
555 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
ddb7c9d2 | 556 | struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; |
bbb44d9f | 557 | |
ad8cfa1d RW |
558 | if (pci_has_legacy_pm_support(pci_dev)) |
559 | return pci_legacy_suspend(dev, PMSG_SUSPEND); | |
bb808945 | 560 | |
5294e256 RW |
561 | if (!pm) { |
562 | pci_pm_default_suspend(pci_dev); | |
563 | goto Fixup; | |
564 | } | |
565 | ||
566 | pci_dev->state_saved = false; | |
567 | ||
568 | if (pm->suspend) { | |
569 | pci_power_t prev = pci_dev->current_state; | |
570 | int error; | |
571 | ||
ddb7c9d2 RW |
572 | error = pm->suspend(dev); |
573 | suspend_report_result(pm->suspend, error); | |
5294e256 RW |
574 | if (error) |
575 | return error; | |
576 | ||
577 | if (pci_dev->state_saved) | |
578 | goto Fixup; | |
579 | ||
580 | if (pci_dev->current_state != PCI_D0 | |
581 | && pci_dev->current_state != PCI_UNKNOWN) { | |
582 | WARN_ONCE(pci_dev->current_state != prev, | |
583 | "PCI PM: State of device not saved by %pF\n", | |
584 | pm->suspend); | |
585 | goto Fixup; | |
586 | } | |
bbb44d9f | 587 | } |
fa58d305 | 588 | |
5294e256 RW |
589 | if (!pci_dev->state_saved) { |
590 | pci_save_state(pci_dev); | |
591 | if (!pci_is_bridge(pci_dev)) | |
592 | pci_prepare_to_sleep(pci_dev); | |
593 | } | |
bbb44d9f | 594 | |
5294e256 RW |
595 | Fixup: |
596 | pci_fixup_device(pci_fixup_suspend, pci_dev); | |
597 | ||
598 | return 0; | |
bbb44d9f RW |
599 | } |
600 | ||
601 | static int pci_pm_suspend_noirq(struct device *dev) | |
c8958177 | 602 | { |
355a72d7 | 603 | struct pci_dev *pci_dev = to_pci_dev(dev); |
adf09493 | 604 | struct device_driver *drv = dev->driver; |
bbb44d9f | 605 | int error = 0; |
c8958177 | 606 | |
bb808945 RW |
607 | if (pci_has_legacy_pm_support(pci_dev)) |
608 | return pci_legacy_suspend_late(dev, PMSG_SUSPEND); | |
609 | ||
d67e37d7 RW |
610 | if (drv && drv->pm && drv->pm->suspend_noirq) { |
611 | error = drv->pm->suspend_noirq(dev); | |
612 | suspend_report_result(drv->pm->suspend_noirq, error); | |
bbb44d9f RW |
613 | } |
614 | ||
d67e37d7 RW |
615 | if (!error) |
616 | pci_pm_set_unknown_state(pci_dev); | |
617 | ||
bbb44d9f | 618 | return error; |
c8958177 | 619 | } |
1da177e4 | 620 | |
f6dc1e5e | 621 | static int pci_pm_resume_noirq(struct device *dev) |
bbb44d9f RW |
622 | { |
623 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
624 | struct device_driver *drv = dev->driver; | |
355a72d7 | 625 | int error = 0; |
bbb44d9f | 626 | |
aa8c6c93 RW |
627 | pci_pm_default_resume_noirq(pci_dev); |
628 | ||
ad8cfa1d | 629 | if (pci_has_legacy_pm_support(pci_dev)) |
f6dc1e5e | 630 | return pci_legacy_resume_early(dev); |
bb808945 | 631 | |
f6dc1e5e RW |
632 | if (drv && drv->pm && drv->pm->resume_noirq) |
633 | error = drv->pm->resume_noirq(dev); | |
bbb44d9f RW |
634 | |
635 | return error; | |
636 | } | |
637 | ||
f6dc1e5e | 638 | static int pci_pm_resume(struct device *dev) |
bbb44d9f | 639 | { |
355a72d7 | 640 | struct pci_dev *pci_dev = to_pci_dev(dev); |
5294e256 | 641 | struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; |
bbb44d9f RW |
642 | int error = 0; |
643 | ||
418e4da3 RW |
644 | /* |
645 | * This is necessary for the suspend error path in which resume is | |
646 | * called without restoring the standard config registers of the device. | |
647 | */ | |
648 | if (pci_dev->state_saved) | |
649 | pci_restore_standard_config(pci_dev); | |
650 | ||
ad8cfa1d | 651 | if (pci_has_legacy_pm_support(pci_dev)) |
f6dc1e5e | 652 | return pci_legacy_resume(dev); |
bb808945 | 653 | |
5294e256 | 654 | pci_pm_default_resume(pci_dev); |
73410429 | 655 | |
5294e256 RW |
656 | if (pm) { |
657 | if (pm->resume) | |
658 | error = pm->resume(dev); | |
659 | } else { | |
660 | pci_pm_reenable_device(pci_dev); | |
661 | } | |
bbb44d9f | 662 | |
5294e256 | 663 | return 0; |
bbb44d9f RW |
664 | } |
665 | ||
666 | #else /* !CONFIG_SUSPEND */ | |
667 | ||
668 | #define pci_pm_suspend NULL | |
669 | #define pci_pm_suspend_noirq NULL | |
670 | #define pci_pm_resume NULL | |
671 | #define pci_pm_resume_noirq NULL | |
672 | ||
673 | #endif /* !CONFIG_SUSPEND */ | |
674 | ||
675 | #ifdef CONFIG_HIBERNATION | |
676 | ||
677 | static int pci_pm_freeze(struct device *dev) | |
678 | { | |
679 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
5294e256 | 680 | struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; |
bbb44d9f | 681 | |
ad8cfa1d RW |
682 | if (pci_has_legacy_pm_support(pci_dev)) |
683 | return pci_legacy_suspend(dev, PMSG_FREEZE); | |
bb808945 | 684 | |
5294e256 RW |
685 | if (!pm) { |
686 | pci_pm_default_suspend(pci_dev); | |
687 | return 0; | |
bbb44d9f RW |
688 | } |
689 | ||
5294e256 | 690 | pci_dev->state_saved = false; |
d67e37d7 | 691 | |
5294e256 RW |
692 | if (pm->freeze) { |
693 | int error; | |
694 | ||
695 | error = pm->freeze(dev); | |
696 | suspend_report_result(pm->freeze, error); | |
697 | if (error) | |
698 | return error; | |
699 | } | |
700 | ||
701 | if (!pci_dev->state_saved) | |
702 | pci_save_state(pci_dev); | |
703 | ||
704 | return 0; | |
bbb44d9f RW |
705 | } |
706 | ||
707 | static int pci_pm_freeze_noirq(struct device *dev) | |
708 | { | |
355a72d7 | 709 | struct pci_dev *pci_dev = to_pci_dev(dev); |
adf09493 | 710 | struct device_driver *drv = dev->driver; |
bbb44d9f RW |
711 | int error = 0; |
712 | ||
bb808945 RW |
713 | if (pci_has_legacy_pm_support(pci_dev)) |
714 | return pci_legacy_suspend_late(dev, PMSG_FREEZE); | |
715 | ||
d67e37d7 RW |
716 | if (drv && drv->pm && drv->pm->freeze_noirq) { |
717 | error = drv->pm->freeze_noirq(dev); | |
718 | suspend_report_result(drv->pm->freeze_noirq, error); | |
bbb44d9f RW |
719 | } |
720 | ||
d67e37d7 RW |
721 | if (!error) |
722 | pci_pm_set_unknown_state(pci_dev); | |
723 | ||
bbb44d9f RW |
724 | return error; |
725 | } | |
726 | ||
f6dc1e5e | 727 | static int pci_pm_thaw_noirq(struct device *dev) |
bbb44d9f | 728 | { |
355a72d7 | 729 | struct pci_dev *pci_dev = to_pci_dev(dev); |
bbb44d9f RW |
730 | struct device_driver *drv = dev->driver; |
731 | int error = 0; | |
732 | ||
ad8cfa1d | 733 | if (pci_has_legacy_pm_support(pci_dev)) |
f6dc1e5e | 734 | return pci_legacy_resume_early(dev); |
bb808945 | 735 | |
f6dc1e5e | 736 | pci_update_current_state(pci_dev, PCI_D0); |
d67e37d7 | 737 | |
f6dc1e5e RW |
738 | if (drv && drv->pm && drv->pm->thaw_noirq) |
739 | error = drv->pm->thaw_noirq(dev); | |
bbb44d9f RW |
740 | |
741 | return error; | |
742 | } | |
743 | ||
f6dc1e5e | 744 | static int pci_pm_thaw(struct device *dev) |
bbb44d9f | 745 | { |
355a72d7 | 746 | struct pci_dev *pci_dev = to_pci_dev(dev); |
5294e256 | 747 | struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; |
bbb44d9f RW |
748 | int error = 0; |
749 | ||
ad8cfa1d | 750 | if (pci_has_legacy_pm_support(pci_dev)) |
f6dc1e5e | 751 | return pci_legacy_resume(dev); |
bb808945 | 752 | |
5294e256 RW |
753 | if (pm) { |
754 | if (pm->thaw) | |
755 | error = pm->thaw(dev); | |
756 | } else { | |
757 | pci_pm_reenable_device(pci_dev); | |
758 | } | |
bbb44d9f RW |
759 | |
760 | return error; | |
761 | } | |
762 | ||
763 | static int pci_pm_poweroff(struct device *dev) | |
764 | { | |
355a72d7 | 765 | struct pci_dev *pci_dev = to_pci_dev(dev); |
ddb7c9d2 | 766 | struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; |
bbb44d9f RW |
767 | int error = 0; |
768 | ||
ad8cfa1d RW |
769 | if (pci_has_legacy_pm_support(pci_dev)) |
770 | return pci_legacy_suspend(dev, PMSG_HIBERNATE); | |
bb808945 | 771 | |
5294e256 RW |
772 | if (!pm) { |
773 | pci_pm_default_suspend(pci_dev); | |
774 | goto Fixup; | |
775 | } | |
776 | ||
777 | pci_dev->state_saved = false; | |
778 | ||
779 | if (pm->poweroff) { | |
ddb7c9d2 RW |
780 | error = pm->poweroff(dev); |
781 | suspend_report_result(pm->poweroff, error); | |
bbb44d9f RW |
782 | } |
783 | ||
5294e256 RW |
784 | if (!pci_dev->state_saved && !pci_is_bridge(pci_dev)) |
785 | pci_prepare_to_sleep(pci_dev); | |
786 | ||
787 | Fixup: | |
788 | pci_fixup_device(pci_fixup_suspend, pci_dev); | |
c9b9972b | 789 | |
bbb44d9f RW |
790 | return error; |
791 | } | |
792 | ||
793 | static int pci_pm_poweroff_noirq(struct device *dev) | |
794 | { | |
adf09493 | 795 | struct device_driver *drv = dev->driver; |
bbb44d9f RW |
796 | int error = 0; |
797 | ||
bb808945 RW |
798 | if (pci_has_legacy_pm_support(to_pci_dev(dev))) |
799 | return pci_legacy_suspend_late(dev, PMSG_HIBERNATE); | |
800 | ||
d67e37d7 RW |
801 | if (drv && drv->pm && drv->pm->poweroff_noirq) { |
802 | error = drv->pm->poweroff_noirq(dev); | |
803 | suspend_report_result(drv->pm->poweroff_noirq, error); | |
bbb44d9f RW |
804 | } |
805 | ||
806 | return error; | |
807 | } | |
808 | ||
f6dc1e5e | 809 | static int pci_pm_restore_noirq(struct device *dev) |
bbb44d9f RW |
810 | { |
811 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
812 | struct device_driver *drv = dev->driver; | |
355a72d7 | 813 | int error = 0; |
bbb44d9f | 814 | |
aa8c6c93 RW |
815 | pci_pm_default_resume_noirq(pci_dev); |
816 | ||
ad8cfa1d | 817 | if (pci_has_legacy_pm_support(pci_dev)) |
f6dc1e5e | 818 | return pci_legacy_resume_early(dev); |
bb808945 | 819 | |
f6dc1e5e RW |
820 | if (drv && drv->pm && drv->pm->restore_noirq) |
821 | error = drv->pm->restore_noirq(dev); | |
bbb44d9f RW |
822 | |
823 | return error; | |
824 | } | |
825 | ||
f6dc1e5e | 826 | static int pci_pm_restore(struct device *dev) |
bbb44d9f RW |
827 | { |
828 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
5294e256 | 829 | struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; |
bbb44d9f RW |
830 | int error = 0; |
831 | ||
418e4da3 RW |
832 | /* |
833 | * This is necessary for the hibernation error path in which restore is | |
834 | * called without restoring the standard config registers of the device. | |
835 | */ | |
836 | if (pci_dev->state_saved) | |
837 | pci_restore_standard_config(pci_dev); | |
838 | ||
ad8cfa1d | 839 | if (pci_has_legacy_pm_support(pci_dev)) |
f6dc1e5e | 840 | return pci_legacy_resume(dev); |
bb808945 | 841 | |
5294e256 | 842 | pci_pm_default_resume(pci_dev); |
73410429 | 843 | |
5294e256 RW |
844 | if (pm) { |
845 | if (pm->restore) | |
846 | error = pm->restore(dev); | |
847 | } else { | |
848 | pci_pm_reenable_device(pci_dev); | |
849 | } | |
bbb44d9f RW |
850 | |
851 | return error; | |
c8958177 | 852 | } |
1da177e4 | 853 | |
bbb44d9f RW |
854 | #else /* !CONFIG_HIBERNATION */ |
855 | ||
856 | #define pci_pm_freeze NULL | |
857 | #define pci_pm_freeze_noirq NULL | |
858 | #define pci_pm_thaw NULL | |
859 | #define pci_pm_thaw_noirq NULL | |
860 | #define pci_pm_poweroff NULL | |
861 | #define pci_pm_poweroff_noirq NULL | |
862 | #define pci_pm_restore NULL | |
863 | #define pci_pm_restore_noirq NULL | |
864 | ||
865 | #endif /* !CONFIG_HIBERNATION */ | |
866 | ||
adf09493 RW |
867 | struct dev_pm_ops pci_dev_pm_ops = { |
868 | .prepare = pci_pm_prepare, | |
869 | .complete = pci_pm_complete, | |
870 | .suspend = pci_pm_suspend, | |
871 | .resume = pci_pm_resume, | |
872 | .freeze = pci_pm_freeze, | |
873 | .thaw = pci_pm_thaw, | |
874 | .poweroff = pci_pm_poweroff, | |
875 | .restore = pci_pm_restore, | |
bbb44d9f RW |
876 | .suspend_noirq = pci_pm_suspend_noirq, |
877 | .resume_noirq = pci_pm_resume_noirq, | |
878 | .freeze_noirq = pci_pm_freeze_noirq, | |
879 | .thaw_noirq = pci_pm_thaw_noirq, | |
880 | .poweroff_noirq = pci_pm_poweroff_noirq, | |
881 | .restore_noirq = pci_pm_restore_noirq, | |
882 | }; | |
883 | ||
adf09493 | 884 | #define PCI_PM_OPS_PTR (&pci_dev_pm_ops) |
bbb44d9f RW |
885 | |
886 | #else /* !CONFIG_PM_SLEEP */ | |
887 | ||
888 | #define PCI_PM_OPS_PTR NULL | |
889 | ||
890 | #endif /* !CONFIG_PM_SLEEP */ | |
891 | ||
1da177e4 | 892 | /** |
863b18f4 | 893 | * __pci_register_driver - register a new pci driver |
1da177e4 | 894 | * @drv: the driver structure to register |
863b18f4 | 895 | * @owner: owner module of drv |
f95d882d | 896 | * @mod_name: module name string |
1da177e4 LT |
897 | * |
898 | * Adds the driver structure to the list of registered drivers. | |
899 | * Returns a negative value on error, otherwise 0. | |
eaae4b3a | 900 | * If no error occurred, the driver remains registered even if |
1da177e4 LT |
901 | * no device was claimed during registration. |
902 | */ | |
725522b5 GKH |
903 | int __pci_register_driver(struct pci_driver *drv, struct module *owner, |
904 | const char *mod_name) | |
1da177e4 LT |
905 | { |
906 | int error; | |
907 | ||
908 | /* initialize common driver fields */ | |
909 | drv->driver.name = drv->name; | |
910 | drv->driver.bus = &pci_bus_type; | |
863b18f4 | 911 | drv->driver.owner = owner; |
725522b5 | 912 | drv->driver.mod_name = mod_name; |
50b00755 | 913 | |
75865858 GKH |
914 | spin_lock_init(&drv->dynids.lock); |
915 | INIT_LIST_HEAD(&drv->dynids.list); | |
1da177e4 LT |
916 | |
917 | /* register with core */ | |
918 | error = driver_register(&drv->driver); | |
50bf14b3 | 919 | if (error) |
0994375e | 920 | goto out; |
1da177e4 | 921 | |
50bf14b3 AM |
922 | error = pci_create_newid_file(drv); |
923 | if (error) | |
0994375e | 924 | goto out_newid; |
1da177e4 | 925 | |
0994375e CW |
926 | error = pci_create_removeid_file(drv); |
927 | if (error) | |
928 | goto out_removeid; | |
929 | out: | |
1da177e4 | 930 | return error; |
0994375e CW |
931 | |
932 | out_removeid: | |
933 | pci_remove_newid_file(drv); | |
934 | out_newid: | |
935 | driver_unregister(&drv->driver); | |
936 | goto out; | |
1da177e4 LT |
937 | } |
938 | ||
939 | /** | |
940 | * pci_unregister_driver - unregister a pci driver | |
941 | * @drv: the driver structure to unregister | |
942 | * | |
943 | * Deletes the driver structure from the list of registered PCI drivers, | |
944 | * gives it a chance to clean up by calling its remove() function for | |
945 | * each device it was responsible for, and marks those devices as | |
946 | * driverless. | |
947 | */ | |
948 | ||
949 | void | |
950 | pci_unregister_driver(struct pci_driver *drv) | |
951 | { | |
0994375e | 952 | pci_remove_removeid_file(drv); |
03d43b19 | 953 | pci_remove_newid_file(drv); |
1da177e4 LT |
954 | driver_unregister(&drv->driver); |
955 | pci_free_dynids(drv); | |
956 | } | |
957 | ||
958 | static struct pci_driver pci_compat_driver = { | |
959 | .name = "compat" | |
960 | }; | |
961 | ||
962 | /** | |
963 | * pci_dev_driver - get the pci_driver of a device | |
964 | * @dev: the device to query | |
965 | * | |
966 | * Returns the appropriate pci_driver structure or %NULL if there is no | |
967 | * registered driver for the device. | |
968 | */ | |
969 | struct pci_driver * | |
970 | pci_dev_driver(const struct pci_dev *dev) | |
971 | { | |
972 | if (dev->driver) | |
973 | return dev->driver; | |
974 | else { | |
975 | int i; | |
976 | for(i=0; i<=PCI_ROM_RESOURCE; i++) | |
977 | if (dev->resource[i].flags & IORESOURCE_BUSY) | |
978 | return &pci_compat_driver; | |
979 | } | |
980 | return NULL; | |
981 | } | |
982 | ||
983 | /** | |
984 | * pci_bus_match - Tell if a PCI device structure has a matching PCI device id structure | |
1da177e4 | 985 | * @dev: the PCI device structure to match against |
8f7020d3 | 986 | * @drv: the device driver to search for matching PCI device id structures |
1da177e4 LT |
987 | * |
988 | * Used by a driver to check whether a PCI device present in the | |
8f7020d3 | 989 | * system is in its list of supported devices. Returns the matching |
1da177e4 LT |
990 | * pci_device_id structure or %NULL if there is no match. |
991 | */ | |
75865858 | 992 | static int pci_bus_match(struct device *dev, struct device_driver *drv) |
1da177e4 | 993 | { |
75865858 GKH |
994 | struct pci_dev *pci_dev = to_pci_dev(dev); |
995 | struct pci_driver *pci_drv = to_pci_driver(drv); | |
1da177e4 LT |
996 | const struct pci_device_id *found_id; |
997 | ||
75865858 | 998 | found_id = pci_match_device(pci_drv, pci_dev); |
1da177e4 LT |
999 | if (found_id) |
1000 | return 1; | |
1001 | ||
75865858 | 1002 | return 0; |
1da177e4 LT |
1003 | } |
1004 | ||
1005 | /** | |
1006 | * pci_dev_get - increments the reference count of the pci device structure | |
1007 | * @dev: the device being referenced | |
1008 | * | |
1009 | * Each live reference to a device should be refcounted. | |
1010 | * | |
1011 | * Drivers for PCI devices should normally record such references in | |
1012 | * their probe() methods, when they bind to a device, and release | |
1013 | * them by calling pci_dev_put(), in their disconnect() methods. | |
1014 | * | |
1015 | * A pointer to the device with the incremented reference counter is returned. | |
1016 | */ | |
1017 | struct pci_dev *pci_dev_get(struct pci_dev *dev) | |
1018 | { | |
1019 | if (dev) | |
1020 | get_device(&dev->dev); | |
1021 | return dev; | |
1022 | } | |
1023 | ||
1024 | /** | |
1025 | * pci_dev_put - release a use of the pci device structure | |
1026 | * @dev: device that's been disconnected | |
1027 | * | |
1028 | * Must be called when a user of a device is finished with it. When the last | |
1029 | * user of the device calls this function, the memory of the device is freed. | |
1030 | */ | |
1031 | void pci_dev_put(struct pci_dev *dev) | |
1032 | { | |
1033 | if (dev) | |
1034 | put_device(&dev->dev); | |
1035 | } | |
1036 | ||
1037 | #ifndef CONFIG_HOTPLUG | |
7eff2e7a | 1038 | int pci_uevent(struct device *dev, struct kobj_uevent_env *env) |
1da177e4 LT |
1039 | { |
1040 | return -ENODEV; | |
1041 | } | |
1042 | #endif | |
1043 | ||
1044 | struct bus_type pci_bus_type = { | |
1045 | .name = "pci", | |
1046 | .match = pci_bus_match, | |
312c004d | 1047 | .uevent = pci_uevent, |
b15d686a RK |
1048 | .probe = pci_device_probe, |
1049 | .remove = pci_device_remove, | |
cbd69dbb | 1050 | .shutdown = pci_device_shutdown, |
1da177e4 | 1051 | .dev_attrs = pci_dev_attrs, |
bbb44d9f | 1052 | .pm = PCI_PM_OPS_PTR, |
1da177e4 LT |
1053 | }; |
1054 | ||
1055 | static int __init pci_driver_init(void) | |
1056 | { | |
1057 | return bus_register(&pci_bus_type); | |
1058 | } | |
1059 | ||
1060 | postcore_initcall(pci_driver_init); | |
1061 | ||
75865858 | 1062 | EXPORT_SYMBOL(pci_match_id); |
863b18f4 | 1063 | EXPORT_SYMBOL(__pci_register_driver); |
1da177e4 LT |
1064 | EXPORT_SYMBOL(pci_unregister_driver); |
1065 | EXPORT_SYMBOL(pci_dev_driver); | |
1066 | EXPORT_SYMBOL(pci_bus_type); | |
1067 | EXPORT_SYMBOL(pci_dev_get); | |
1068 | EXPORT_SYMBOL(pci_dev_put); |