Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * drivers/pci/pci-driver.c | |
3 | * | |
2b937303 GKH |
4 | * (C) Copyright 2002-2004, 2007 Greg Kroah-Hartman <greg@kroah.com> |
5 | * (C) Copyright 2007 Novell Inc. | |
6 | * | |
7 | * Released under the GPL v2 only. | |
8 | * | |
1da177e4 LT |
9 | */ |
10 | ||
11 | #include <linux/pci.h> | |
12 | #include <linux/module.h> | |
13 | #include <linux/init.h> | |
14 | #include <linux/device.h> | |
d42c6997 | 15 | #include <linux/mempolicy.h> |
4e57b681 TS |
16 | #include <linux/string.h> |
17 | #include <linux/slab.h> | |
8c65b4a6 | 18 | #include <linux/sched.h> |
1da177e4 LT |
19 | #include "pci.h" |
20 | ||
1da177e4 LT |
21 | /* |
22 | * Dynamic device IDs are disabled for !CONFIG_HOTPLUG | |
23 | */ | |
24 | ||
75865858 GKH |
25 | struct pci_dynid { |
26 | struct list_head node; | |
27 | struct pci_device_id id; | |
28 | }; | |
1da177e4 | 29 | |
3d3c2ae1 GK |
30 | #ifdef CONFIG_HOTPLUG |
31 | ||
1da177e4 | 32 | /** |
8f7020d3 RD |
33 | * store_new_id - add a new PCI device ID to this driver and re-probe devices |
34 | * @driver: target device driver | |
35 | * @buf: buffer for scanning device ID data | |
36 | * @count: input size | |
1da177e4 LT |
37 | * |
38 | * Adds a new dynamic pci device ID to this driver, | |
39 | * and causes the driver to probe for all devices again. | |
40 | */ | |
f8eb1005 | 41 | static ssize_t |
1da177e4 LT |
42 | store_new_id(struct device_driver *driver, const char *buf, size_t count) |
43 | { | |
75865858 | 44 | struct pci_dynid *dynid; |
1da177e4 | 45 | struct pci_driver *pdrv = to_pci_driver(driver); |
6ba18636 | 46 | __u32 vendor, device, subvendor=PCI_ANY_ID, |
1da177e4 LT |
47 | subdevice=PCI_ANY_ID, class=0, class_mask=0; |
48 | unsigned long driver_data=0; | |
49 | int fields=0; | |
b19441af | 50 | int retval = 0; |
1da177e4 LT |
51 | |
52 | fields = sscanf(buf, "%x %x %x %x %x %x %lux", | |
53 | &vendor, &device, &subvendor, &subdevice, | |
54 | &class, &class_mask, &driver_data); | |
6ba18636 | 55 | if (fields < 2) |
1da177e4 LT |
56 | return -EINVAL; |
57 | ||
f5afe806 | 58 | dynid = kzalloc(sizeof(*dynid), GFP_KERNEL); |
1da177e4 LT |
59 | if (!dynid) |
60 | return -ENOMEM; | |
61 | ||
1da177e4 LT |
62 | dynid->id.vendor = vendor; |
63 | dynid->id.device = device; | |
64 | dynid->id.subvendor = subvendor; | |
65 | dynid->id.subdevice = subdevice; | |
66 | dynid->id.class = class; | |
67 | dynid->id.class_mask = class_mask; | |
68 | dynid->id.driver_data = pdrv->dynids.use_driver_data ? | |
69 | driver_data : 0UL; | |
70 | ||
71 | spin_lock(&pdrv->dynids.lock); | |
a56bc69a | 72 | list_add_tail(&dynid->node, &pdrv->dynids.list); |
1da177e4 LT |
73 | spin_unlock(&pdrv->dynids.lock); |
74 | ||
75865858 | 75 | if (get_driver(&pdrv->driver)) { |
b19441af | 76 | retval = driver_attach(&pdrv->driver); |
75865858 | 77 | put_driver(&pdrv->driver); |
1da177e4 LT |
78 | } |
79 | ||
b19441af GKH |
80 | if (retval) |
81 | return retval; | |
1da177e4 LT |
82 | return count; |
83 | } | |
1da177e4 | 84 | static DRIVER_ATTR(new_id, S_IWUSR, NULL, store_new_id); |
1da177e4 LT |
85 | |
86 | static void | |
87 | pci_free_dynids(struct pci_driver *drv) | |
88 | { | |
75865858 | 89 | struct pci_dynid *dynid, *n; |
1da177e4 LT |
90 | |
91 | spin_lock(&drv->dynids.lock); | |
75865858 | 92 | list_for_each_entry_safe(dynid, n, &drv->dynids.list, node) { |
1da177e4 LT |
93 | list_del(&dynid->node); |
94 | kfree(dynid); | |
95 | } | |
96 | spin_unlock(&drv->dynids.lock); | |
97 | } | |
98 | ||
99 | static int | |
100 | pci_create_newid_file(struct pci_driver *drv) | |
101 | { | |
102 | int error = 0; | |
103 | if (drv->probe != NULL) | |
03d43b19 | 104 | error = driver_create_file(&drv->driver, &driver_attr_new_id); |
1da177e4 LT |
105 | return error; |
106 | } | |
107 | ||
03d43b19 GKH |
108 | static void pci_remove_newid_file(struct pci_driver *drv) |
109 | { | |
110 | driver_remove_file(&drv->driver, &driver_attr_new_id); | |
111 | } | |
1da177e4 | 112 | #else /* !CONFIG_HOTPLUG */ |
1da177e4 LT |
113 | static inline void pci_free_dynids(struct pci_driver *drv) {} |
114 | static inline int pci_create_newid_file(struct pci_driver *drv) | |
115 | { | |
116 | return 0; | |
117 | } | |
03d43b19 | 118 | static inline void pci_remove_newid_file(struct pci_driver *drv) {} |
1da177e4 LT |
119 | #endif |
120 | ||
121 | /** | |
75865858 | 122 | * pci_match_id - See if a pci device matches a given pci_id table |
1da177e4 | 123 | * @ids: array of PCI device id structures to search in |
75865858 GKH |
124 | * @dev: the PCI device structure to match against. |
125 | * | |
1da177e4 | 126 | * Used by a driver to check whether a PCI device present in the |
75865858 | 127 | * system is in its list of supported devices. Returns the matching |
1da177e4 | 128 | * pci_device_id structure or %NULL if there is no match. |
75865858 | 129 | * |
8b60756a | 130 | * Deprecated, don't use this as it will not catch any dynamic ids |
75865858 | 131 | * that a driver might want to check for. |
1da177e4 | 132 | */ |
75865858 GKH |
133 | const struct pci_device_id *pci_match_id(const struct pci_device_id *ids, |
134 | struct pci_dev *dev) | |
1da177e4 | 135 | { |
75865858 GKH |
136 | if (ids) { |
137 | while (ids->vendor || ids->subvendor || ids->class_mask) { | |
138 | if (pci_match_one_device(ids, dev)) | |
139 | return ids; | |
140 | ids++; | |
141 | } | |
1da177e4 LT |
142 | } |
143 | return NULL; | |
144 | } | |
145 | ||
146 | /** | |
ae9608af | 147 | * pci_match_device - Tell if a PCI device structure has a matching PCI device id structure |
75865858 | 148 | * @drv: the PCI driver to match against |
39ba487f | 149 | * @dev: the PCI device structure to match against |
75865858 GKH |
150 | * |
151 | * Used by a driver to check whether a PCI device present in the | |
152 | * system is in its list of supported devices. Returns the matching | |
153 | * pci_device_id structure or %NULL if there is no match. | |
1da177e4 | 154 | */ |
d73460d7 AB |
155 | static const struct pci_device_id *pci_match_device(struct pci_driver *drv, |
156 | struct pci_dev *dev) | |
75865858 | 157 | { |
75865858 | 158 | struct pci_dynid *dynid; |
1da177e4 | 159 | |
7461b60a | 160 | /* Look at the dynamic ids first, before the static ones */ |
75865858 GKH |
161 | spin_lock(&drv->dynids.lock); |
162 | list_for_each_entry(dynid, &drv->dynids.list, node) { | |
163 | if (pci_match_one_device(&dynid->id, dev)) { | |
164 | spin_unlock(&drv->dynids.lock); | |
165 | return &dynid->id; | |
166 | } | |
1da177e4 | 167 | } |
75865858 | 168 | spin_unlock(&drv->dynids.lock); |
7461b60a RK |
169 | |
170 | return pci_match_id(drv->id_table, dev); | |
1da177e4 LT |
171 | } |
172 | ||
d42c6997 AK |
173 | static int pci_call_probe(struct pci_driver *drv, struct pci_dev *dev, |
174 | const struct pci_device_id *id) | |
175 | { | |
176 | int error; | |
177 | #ifdef CONFIG_NUMA | |
178 | /* Execute driver initialization on node where the | |
179 | device's bus is attached to. This way the driver likely | |
180 | allocates its local memory on the right node without | |
181 | any need to change it. */ | |
182 | struct mempolicy *oldpol; | |
183 | cpumask_t oldmask = current->cpus_allowed; | |
4efeb4dd | 184 | int node = dev_to_node(&dev->dev); |
f70316da MT |
185 | |
186 | if (node >= 0) { | |
187 | node_to_cpumask_ptr(nodecpumask, node); | |
188 | set_cpus_allowed_ptr(current, nodecpumask); | |
189 | } | |
d42c6997 AK |
190 | /* And set default memory allocation policy */ |
191 | oldpol = current->mempolicy; | |
74e27e44 | 192 | current->mempolicy = NULL; /* fall back to system default policy */ |
d42c6997 AK |
193 | #endif |
194 | error = drv->probe(dev, id); | |
195 | #ifdef CONFIG_NUMA | |
f70316da | 196 | set_cpus_allowed_ptr(current, &oldmask); |
d42c6997 AK |
197 | current->mempolicy = oldpol; |
198 | #endif | |
199 | return error; | |
200 | } | |
201 | ||
1da177e4 LT |
202 | /** |
203 | * __pci_device_probe() | |
8f7020d3 RD |
204 | * @drv: driver to call to check if it wants the PCI device |
205 | * @pci_dev: PCI device being probed | |
1da177e4 | 206 | * |
8f7020d3 | 207 | * returns 0 on success, else error. |
1da177e4 LT |
208 | * side-effect: pci_dev->driver is set to drv when drv claims pci_dev. |
209 | */ | |
210 | static int | |
211 | __pci_device_probe(struct pci_driver *drv, struct pci_dev *pci_dev) | |
75865858 GKH |
212 | { |
213 | const struct pci_device_id *id; | |
1da177e4 LT |
214 | int error = 0; |
215 | ||
216 | if (!pci_dev->driver && drv->probe) { | |
75865858 GKH |
217 | error = -ENODEV; |
218 | ||
219 | id = pci_match_device(drv, pci_dev); | |
220 | if (id) | |
d42c6997 | 221 | error = pci_call_probe(drv, pci_dev, id); |
75865858 GKH |
222 | if (error >= 0) { |
223 | pci_dev->driver = drv; | |
224 | error = 0; | |
225 | } | |
1da177e4 LT |
226 | } |
227 | return error; | |
228 | } | |
229 | ||
230 | static int pci_device_probe(struct device * dev) | |
231 | { | |
232 | int error = 0; | |
233 | struct pci_driver *drv; | |
234 | struct pci_dev *pci_dev; | |
235 | ||
236 | drv = to_pci_driver(dev->driver); | |
237 | pci_dev = to_pci_dev(dev); | |
238 | pci_dev_get(pci_dev); | |
239 | error = __pci_device_probe(drv, pci_dev); | |
240 | if (error) | |
241 | pci_dev_put(pci_dev); | |
242 | ||
243 | return error; | |
244 | } | |
245 | ||
246 | static int pci_device_remove(struct device * dev) | |
247 | { | |
248 | struct pci_dev * pci_dev = to_pci_dev(dev); | |
249 | struct pci_driver * drv = pci_dev->driver; | |
250 | ||
251 | if (drv) { | |
252 | if (drv->remove) | |
253 | drv->remove(pci_dev); | |
254 | pci_dev->driver = NULL; | |
255 | } | |
256 | ||
2449e06a SL |
257 | /* |
258 | * If the device is still on, set the power state as "unknown", | |
259 | * since it might change by the next time we load the driver. | |
260 | */ | |
261 | if (pci_dev->current_state == PCI_D0) | |
262 | pci_dev->current_state = PCI_UNKNOWN; | |
263 | ||
1da177e4 LT |
264 | /* |
265 | * We would love to complain here if pci_dev->is_enabled is set, that | |
266 | * the driver should have called pci_disable_device(), but the | |
267 | * unfortunate fact is there are too many odd BIOS and bridge setups | |
268 | * that don't like drivers doing that all of the time. | |
269 | * Oh well, we can dream of sane hardware when we sleep, no matter how | |
270 | * horrible the crap we have to deal with is when we are awake... | |
271 | */ | |
272 | ||
273 | pci_dev_put(pci_dev); | |
274 | return 0; | |
275 | } | |
276 | ||
bbb44d9f RW |
277 | static void pci_device_shutdown(struct device *dev) |
278 | { | |
279 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
280 | struct pci_driver *drv = pci_dev->driver; | |
281 | ||
282 | if (drv && drv->shutdown) | |
283 | drv->shutdown(pci_dev); | |
284 | pci_msi_shutdown(pci_dev); | |
285 | pci_msix_shutdown(pci_dev); | |
286 | } | |
287 | ||
288 | #ifdef CONFIG_PM_SLEEP | |
289 | ||
290 | /* | |
291 | * Default "suspend" method for devices that have no driver provided suspend, | |
292 | * or not even a driver at all. | |
293 | */ | |
294 | static void pci_default_pm_suspend(struct pci_dev *pci_dev) | |
295 | { | |
296 | pci_save_state(pci_dev); | |
297 | /* | |
298 | * mark its power state as "unknown", since we don't know if | |
299 | * e.g. the BIOS will change its device state when we suspend. | |
300 | */ | |
301 | if (pci_dev->current_state == PCI_D0) | |
302 | pci_dev->current_state = PCI_UNKNOWN; | |
303 | } | |
304 | ||
305 | /* | |
306 | * Default "resume" method for devices that have no driver provided resume, | |
307 | * or not even a driver at all. | |
308 | */ | |
309 | static int pci_default_pm_resume(struct pci_dev *pci_dev) | |
310 | { | |
311 | int retval = 0; | |
312 | ||
313 | /* restore the PCI config space */ | |
314 | pci_restore_state(pci_dev); | |
315 | /* if the device was enabled before suspend, reenable */ | |
316 | retval = pci_reenable_device(pci_dev); | |
317 | /* | |
318 | * if the device was busmaster before the suspend, make it busmaster | |
319 | * again | |
320 | */ | |
321 | if (pci_dev->is_busmaster) | |
322 | pci_set_master(pci_dev); | |
323 | ||
324 | return retval; | |
325 | } | |
326 | ||
327 | static int pci_legacy_suspend(struct device *dev, pm_message_t state) | |
1da177e4 LT |
328 | { |
329 | struct pci_dev * pci_dev = to_pci_dev(dev); | |
330 | struct pci_driver * drv = pci_dev->driver; | |
331 | int i = 0; | |
332 | ||
02669492 | 333 | if (drv && drv->suspend) { |
1da177e4 | 334 | i = drv->suspend(pci_dev, state); |
02669492 AM |
335 | suspend_report_result(drv->suspend, i); |
336 | } else { | |
bbb44d9f | 337 | pci_default_pm_suspend(pci_dev); |
02669492 | 338 | } |
1da177e4 LT |
339 | return i; |
340 | } | |
341 | ||
bbb44d9f | 342 | static int pci_legacy_suspend_late(struct device *dev, pm_message_t state) |
cbd69dbb LT |
343 | { |
344 | struct pci_dev * pci_dev = to_pci_dev(dev); | |
345 | struct pci_driver * drv = pci_dev->driver; | |
346 | int i = 0; | |
347 | ||
348 | if (drv && drv->suspend_late) { | |
349 | i = drv->suspend_late(pci_dev, state); | |
350 | suspend_report_result(drv->suspend_late, i); | |
351 | } | |
352 | return i; | |
353 | } | |
1da177e4 | 354 | |
bbb44d9f | 355 | static int pci_legacy_resume(struct device *dev) |
1da177e4 | 356 | { |
8d92bc22 | 357 | int error; |
1da177e4 LT |
358 | struct pci_dev * pci_dev = to_pci_dev(dev); |
359 | struct pci_driver * drv = pci_dev->driver; | |
360 | ||
361 | if (drv && drv->resume) | |
8d92bc22 | 362 | error = drv->resume(pci_dev); |
1da177e4 | 363 | else |
bbb44d9f | 364 | error = pci_default_pm_resume(pci_dev); |
8d92bc22 | 365 | return error; |
1da177e4 LT |
366 | } |
367 | ||
bbb44d9f | 368 | static int pci_legacy_resume_early(struct device *dev) |
cbd69dbb LT |
369 | { |
370 | int error = 0; | |
371 | struct pci_dev * pci_dev = to_pci_dev(dev); | |
372 | struct pci_driver * drv = pci_dev->driver; | |
373 | ||
374 | if (drv && drv->resume_early) | |
375 | error = drv->resume_early(pci_dev); | |
376 | return error; | |
377 | } | |
378 | ||
bbb44d9f RW |
379 | static int pci_pm_prepare(struct device *dev) |
380 | { | |
381 | struct device_driver *drv = dev->driver; | |
382 | int error = 0; | |
383 | ||
384 | if (drv && drv->pm && drv->pm->prepare) | |
385 | error = drv->pm->prepare(dev); | |
386 | ||
387 | return error; | |
388 | } | |
389 | ||
390 | static void pci_pm_complete(struct device *dev) | |
391 | { | |
392 | struct device_driver *drv = dev->driver; | |
393 | ||
394 | if (drv && drv->pm && drv->pm->complete) | |
395 | drv->pm->complete(dev); | |
396 | } | |
397 | ||
398 | #ifdef CONFIG_SUSPEND | |
399 | ||
400 | static int pci_pm_suspend(struct device *dev) | |
401 | { | |
402 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
403 | struct device_driver *drv = dev->driver; | |
404 | int error = 0; | |
405 | ||
406 | if (drv && drv->pm) { | |
407 | if (drv->pm->suspend) { | |
408 | error = drv->pm->suspend(dev); | |
409 | suspend_report_result(drv->pm->suspend, error); | |
410 | } else { | |
411 | pci_default_pm_suspend(pci_dev); | |
412 | } | |
413 | } else { | |
414 | error = pci_legacy_suspend(dev, PMSG_SUSPEND); | |
415 | } | |
416 | pci_fixup_device(pci_fixup_suspend, pci_dev); | |
417 | ||
418 | return error; | |
419 | } | |
420 | ||
421 | static int pci_pm_suspend_noirq(struct device *dev) | |
c8958177 GK |
422 | { |
423 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
424 | struct pci_driver *drv = pci_dev->driver; | |
bbb44d9f | 425 | int error = 0; |
c8958177 | 426 | |
bbb44d9f RW |
427 | if (drv && drv->pm) { |
428 | if (drv->pm->suspend_noirq) { | |
429 | error = drv->pm->suspend_noirq(dev); | |
430 | suspend_report_result(drv->pm->suspend_noirq, error); | |
431 | } | |
432 | } else { | |
433 | error = pci_legacy_suspend_late(dev, PMSG_SUSPEND); | |
434 | } | |
435 | ||
436 | return error; | |
c8958177 | 437 | } |
1da177e4 | 438 | |
bbb44d9f RW |
439 | static int pci_pm_resume(struct device *dev) |
440 | { | |
441 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
442 | struct device_driver *drv = dev->driver; | |
443 | int error; | |
444 | ||
445 | pci_fixup_device(pci_fixup_resume, pci_dev); | |
446 | ||
447 | if (drv && drv->pm) { | |
448 | error = drv->pm->resume ? drv->pm->resume(dev) : | |
449 | pci_default_pm_resume(pci_dev); | |
450 | } else { | |
451 | error = pci_legacy_resume(dev); | |
452 | } | |
453 | ||
454 | return error; | |
455 | } | |
456 | ||
457 | static int pci_pm_resume_noirq(struct device *dev) | |
458 | { | |
459 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
460 | struct pci_driver *drv = pci_dev->driver; | |
461 | int error = 0; | |
462 | ||
463 | pci_fixup_device(pci_fixup_resume_early, pci_dev); | |
464 | ||
465 | if (drv && drv->pm) { | |
466 | if (drv->pm->resume_noirq) | |
467 | error = drv->pm->resume_noirq(dev); | |
468 | } else { | |
469 | error = pci_legacy_resume_early(dev); | |
470 | } | |
471 | ||
472 | return error; | |
473 | } | |
474 | ||
475 | #else /* !CONFIG_SUSPEND */ | |
476 | ||
477 | #define pci_pm_suspend NULL | |
478 | #define pci_pm_suspend_noirq NULL | |
479 | #define pci_pm_resume NULL | |
480 | #define pci_pm_resume_noirq NULL | |
481 | ||
482 | #endif /* !CONFIG_SUSPEND */ | |
483 | ||
484 | #ifdef CONFIG_HIBERNATION | |
485 | ||
486 | static int pci_pm_freeze(struct device *dev) | |
487 | { | |
488 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
489 | struct device_driver *drv = dev->driver; | |
490 | int error = 0; | |
491 | ||
492 | if (drv && drv->pm) { | |
493 | if (drv->pm->freeze) { | |
494 | error = drv->pm->freeze(dev); | |
495 | suspend_report_result(drv->pm->freeze, error); | |
496 | } else { | |
497 | pci_default_pm_suspend(pci_dev); | |
498 | } | |
499 | } else { | |
500 | error = pci_legacy_suspend(dev, PMSG_FREEZE); | |
501 | pci_fixup_device(pci_fixup_suspend, pci_dev); | |
502 | } | |
503 | ||
504 | return error; | |
505 | } | |
506 | ||
507 | static int pci_pm_freeze_noirq(struct device *dev) | |
508 | { | |
509 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
510 | struct pci_driver *drv = pci_dev->driver; | |
511 | int error = 0; | |
512 | ||
513 | if (drv && drv->pm) { | |
514 | if (drv->pm->freeze_noirq) { | |
515 | error = drv->pm->freeze_noirq(dev); | |
516 | suspend_report_result(drv->pm->freeze_noirq, error); | |
517 | } | |
518 | } else { | |
519 | error = pci_legacy_suspend_late(dev, PMSG_FREEZE); | |
520 | } | |
521 | ||
522 | return error; | |
523 | } | |
524 | ||
525 | static int pci_pm_thaw(struct device *dev) | |
526 | { | |
527 | struct device_driver *drv = dev->driver; | |
528 | int error = 0; | |
529 | ||
530 | if (drv && drv->pm) { | |
531 | if (drv->pm->thaw) | |
532 | error = drv->pm->thaw(dev); | |
533 | } else { | |
534 | pci_fixup_device(pci_fixup_resume, to_pci_dev(dev)); | |
535 | error = pci_legacy_resume(dev); | |
536 | } | |
537 | ||
538 | return error; | |
539 | } | |
540 | ||
541 | static int pci_pm_thaw_noirq(struct device *dev) | |
542 | { | |
543 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
544 | struct pci_driver *drv = pci_dev->driver; | |
545 | int error = 0; | |
546 | ||
547 | if (drv && drv->pm) { | |
548 | if (drv->pm->thaw_noirq) | |
549 | error = drv->pm->thaw_noirq(dev); | |
550 | } else { | |
551 | pci_fixup_device(pci_fixup_resume_early, pci_dev); | |
552 | error = pci_legacy_resume_early(dev); | |
553 | } | |
554 | ||
555 | return error; | |
556 | } | |
557 | ||
558 | static int pci_pm_poweroff(struct device *dev) | |
559 | { | |
560 | struct device_driver *drv = dev->driver; | |
561 | int error = 0; | |
562 | ||
563 | pci_fixup_device(pci_fixup_suspend, to_pci_dev(dev)); | |
564 | ||
565 | if (drv && drv->pm) { | |
566 | if (drv->pm->poweroff) { | |
567 | error = drv->pm->poweroff(dev); | |
568 | suspend_report_result(drv->pm->poweroff, error); | |
569 | } | |
570 | } else { | |
571 | error = pci_legacy_suspend(dev, PMSG_HIBERNATE); | |
572 | } | |
573 | ||
574 | return error; | |
575 | } | |
576 | ||
577 | static int pci_pm_poweroff_noirq(struct device *dev) | |
578 | { | |
579 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
580 | struct pci_driver *drv = pci_dev->driver; | |
581 | int error = 0; | |
582 | ||
583 | if (drv && drv->pm) { | |
584 | if (drv->pm->poweroff_noirq) { | |
585 | error = drv->pm->poweroff_noirq(dev); | |
586 | suspend_report_result(drv->pm->poweroff_noirq, error); | |
587 | } | |
588 | } else { | |
589 | error = pci_legacy_suspend_late(dev, PMSG_HIBERNATE); | |
590 | } | |
591 | ||
592 | return error; | |
593 | } | |
594 | ||
595 | static int pci_pm_restore(struct device *dev) | |
596 | { | |
597 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
598 | struct device_driver *drv = dev->driver; | |
599 | int error; | |
600 | ||
601 | if (drv && drv->pm) { | |
602 | error = drv->pm->restore ? drv->pm->restore(dev) : | |
603 | pci_default_pm_resume(pci_dev); | |
604 | } else { | |
605 | error = pci_legacy_resume(dev); | |
606 | } | |
607 | pci_fixup_device(pci_fixup_resume, pci_dev); | |
608 | ||
609 | return error; | |
610 | } | |
611 | ||
612 | static int pci_pm_restore_noirq(struct device *dev) | |
613 | { | |
614 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
615 | struct pci_driver *drv = pci_dev->driver; | |
616 | int error = 0; | |
617 | ||
618 | pci_fixup_device(pci_fixup_resume, pci_dev); | |
619 | ||
620 | if (drv && drv->pm) { | |
621 | if (drv->pm->restore_noirq) | |
622 | error = drv->pm->restore_noirq(dev); | |
623 | } else { | |
624 | error = pci_legacy_resume_early(dev); | |
625 | } | |
626 | pci_fixup_device(pci_fixup_resume_early, pci_dev); | |
627 | ||
628 | return error; | |
c8958177 | 629 | } |
1da177e4 | 630 | |
bbb44d9f RW |
631 | #else /* !CONFIG_HIBERNATION */ |
632 | ||
633 | #define pci_pm_freeze NULL | |
634 | #define pci_pm_freeze_noirq NULL | |
635 | #define pci_pm_thaw NULL | |
636 | #define pci_pm_thaw_noirq NULL | |
637 | #define pci_pm_poweroff NULL | |
638 | #define pci_pm_poweroff_noirq NULL | |
639 | #define pci_pm_restore NULL | |
640 | #define pci_pm_restore_noirq NULL | |
641 | ||
642 | #endif /* !CONFIG_HIBERNATION */ | |
643 | ||
644 | struct pm_ext_ops pci_pm_ops = { | |
645 | .base = { | |
646 | .prepare = pci_pm_prepare, | |
647 | .complete = pci_pm_complete, | |
648 | .suspend = pci_pm_suspend, | |
649 | .resume = pci_pm_resume, | |
650 | .freeze = pci_pm_freeze, | |
651 | .thaw = pci_pm_thaw, | |
652 | .poweroff = pci_pm_poweroff, | |
653 | .restore = pci_pm_restore, | |
654 | }, | |
655 | .suspend_noirq = pci_pm_suspend_noirq, | |
656 | .resume_noirq = pci_pm_resume_noirq, | |
657 | .freeze_noirq = pci_pm_freeze_noirq, | |
658 | .thaw_noirq = pci_pm_thaw_noirq, | |
659 | .poweroff_noirq = pci_pm_poweroff_noirq, | |
660 | .restore_noirq = pci_pm_restore_noirq, | |
661 | }; | |
662 | ||
663 | #define PCI_PM_OPS_PTR &pci_pm_ops | |
664 | ||
665 | #else /* !CONFIG_PM_SLEEP */ | |
666 | ||
667 | #define PCI_PM_OPS_PTR NULL | |
668 | ||
669 | #endif /* !CONFIG_PM_SLEEP */ | |
670 | ||
1da177e4 | 671 | /** |
863b18f4 | 672 | * __pci_register_driver - register a new pci driver |
1da177e4 | 673 | * @drv: the driver structure to register |
863b18f4 | 674 | * @owner: owner module of drv |
f95d882d | 675 | * @mod_name: module name string |
1da177e4 LT |
676 | * |
677 | * Adds the driver structure to the list of registered drivers. | |
678 | * Returns a negative value on error, otherwise 0. | |
eaae4b3a | 679 | * If no error occurred, the driver remains registered even if |
1da177e4 LT |
680 | * no device was claimed during registration. |
681 | */ | |
725522b5 GKH |
682 | int __pci_register_driver(struct pci_driver *drv, struct module *owner, |
683 | const char *mod_name) | |
1da177e4 LT |
684 | { |
685 | int error; | |
686 | ||
687 | /* initialize common driver fields */ | |
688 | drv->driver.name = drv->name; | |
689 | drv->driver.bus = &pci_bus_type; | |
863b18f4 | 690 | drv->driver.owner = owner; |
725522b5 | 691 | drv->driver.mod_name = mod_name; |
50b00755 | 692 | |
bbb44d9f RW |
693 | if (drv->pm) |
694 | drv->driver.pm = &drv->pm->base; | |
695 | ||
75865858 GKH |
696 | spin_lock_init(&drv->dynids.lock); |
697 | INIT_LIST_HEAD(&drv->dynids.list); | |
1da177e4 LT |
698 | |
699 | /* register with core */ | |
700 | error = driver_register(&drv->driver); | |
50bf14b3 AM |
701 | if (error) |
702 | return error; | |
1da177e4 | 703 | |
50bf14b3 AM |
704 | error = pci_create_newid_file(drv); |
705 | if (error) | |
706 | driver_unregister(&drv->driver); | |
1da177e4 LT |
707 | |
708 | return error; | |
709 | } | |
710 | ||
711 | /** | |
712 | * pci_unregister_driver - unregister a pci driver | |
713 | * @drv: the driver structure to unregister | |
714 | * | |
715 | * Deletes the driver structure from the list of registered PCI drivers, | |
716 | * gives it a chance to clean up by calling its remove() function for | |
717 | * each device it was responsible for, and marks those devices as | |
718 | * driverless. | |
719 | */ | |
720 | ||
721 | void | |
722 | pci_unregister_driver(struct pci_driver *drv) | |
723 | { | |
03d43b19 | 724 | pci_remove_newid_file(drv); |
1da177e4 LT |
725 | driver_unregister(&drv->driver); |
726 | pci_free_dynids(drv); | |
727 | } | |
728 | ||
729 | static struct pci_driver pci_compat_driver = { | |
730 | .name = "compat" | |
731 | }; | |
732 | ||
733 | /** | |
734 | * pci_dev_driver - get the pci_driver of a device | |
735 | * @dev: the device to query | |
736 | * | |
737 | * Returns the appropriate pci_driver structure or %NULL if there is no | |
738 | * registered driver for the device. | |
739 | */ | |
740 | struct pci_driver * | |
741 | pci_dev_driver(const struct pci_dev *dev) | |
742 | { | |
743 | if (dev->driver) | |
744 | return dev->driver; | |
745 | else { | |
746 | int i; | |
747 | for(i=0; i<=PCI_ROM_RESOURCE; i++) | |
748 | if (dev->resource[i].flags & IORESOURCE_BUSY) | |
749 | return &pci_compat_driver; | |
750 | } | |
751 | return NULL; | |
752 | } | |
753 | ||
754 | /** | |
755 | * pci_bus_match - Tell if a PCI device structure has a matching PCI device id structure | |
1da177e4 | 756 | * @dev: the PCI device structure to match against |
8f7020d3 | 757 | * @drv: the device driver to search for matching PCI device id structures |
1da177e4 LT |
758 | * |
759 | * Used by a driver to check whether a PCI device present in the | |
8f7020d3 | 760 | * system is in its list of supported devices. Returns the matching |
1da177e4 LT |
761 | * pci_device_id structure or %NULL if there is no match. |
762 | */ | |
75865858 | 763 | static int pci_bus_match(struct device *dev, struct device_driver *drv) |
1da177e4 | 764 | { |
75865858 GKH |
765 | struct pci_dev *pci_dev = to_pci_dev(dev); |
766 | struct pci_driver *pci_drv = to_pci_driver(drv); | |
1da177e4 LT |
767 | const struct pci_device_id *found_id; |
768 | ||
75865858 | 769 | found_id = pci_match_device(pci_drv, pci_dev); |
1da177e4 LT |
770 | if (found_id) |
771 | return 1; | |
772 | ||
75865858 | 773 | return 0; |
1da177e4 LT |
774 | } |
775 | ||
776 | /** | |
777 | * pci_dev_get - increments the reference count of the pci device structure | |
778 | * @dev: the device being referenced | |
779 | * | |
780 | * Each live reference to a device should be refcounted. | |
781 | * | |
782 | * Drivers for PCI devices should normally record such references in | |
783 | * their probe() methods, when they bind to a device, and release | |
784 | * them by calling pci_dev_put(), in their disconnect() methods. | |
785 | * | |
786 | * A pointer to the device with the incremented reference counter is returned. | |
787 | */ | |
788 | struct pci_dev *pci_dev_get(struct pci_dev *dev) | |
789 | { | |
790 | if (dev) | |
791 | get_device(&dev->dev); | |
792 | return dev; | |
793 | } | |
794 | ||
795 | /** | |
796 | * pci_dev_put - release a use of the pci device structure | |
797 | * @dev: device that's been disconnected | |
798 | * | |
799 | * Must be called when a user of a device is finished with it. When the last | |
800 | * user of the device calls this function, the memory of the device is freed. | |
801 | */ | |
802 | void pci_dev_put(struct pci_dev *dev) | |
803 | { | |
804 | if (dev) | |
805 | put_device(&dev->dev); | |
806 | } | |
807 | ||
808 | #ifndef CONFIG_HOTPLUG | |
7eff2e7a | 809 | int pci_uevent(struct device *dev, struct kobj_uevent_env *env) |
1da177e4 LT |
810 | { |
811 | return -ENODEV; | |
812 | } | |
813 | #endif | |
814 | ||
815 | struct bus_type pci_bus_type = { | |
816 | .name = "pci", | |
817 | .match = pci_bus_match, | |
312c004d | 818 | .uevent = pci_uevent, |
b15d686a RK |
819 | .probe = pci_device_probe, |
820 | .remove = pci_device_remove, | |
cbd69dbb | 821 | .shutdown = pci_device_shutdown, |
1da177e4 | 822 | .dev_attrs = pci_dev_attrs, |
bbb44d9f | 823 | .pm = PCI_PM_OPS_PTR, |
1da177e4 LT |
824 | }; |
825 | ||
826 | static int __init pci_driver_init(void) | |
827 | { | |
828 | return bus_register(&pci_bus_type); | |
829 | } | |
830 | ||
831 | postcore_initcall(pci_driver_init); | |
832 | ||
75865858 | 833 | EXPORT_SYMBOL(pci_match_id); |
863b18f4 | 834 | EXPORT_SYMBOL(__pci_register_driver); |
1da177e4 LT |
835 | EXPORT_SYMBOL(pci_unregister_driver); |
836 | EXPORT_SYMBOL(pci_dev_driver); | |
837 | EXPORT_SYMBOL(pci_bus_type); | |
838 | EXPORT_SYMBOL(pci_dev_get); | |
839 | EXPORT_SYMBOL(pci_dev_put); |