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); |
b41d6cf3 | 46 | const struct pci_device_id *ids = pdrv->id_table; |
6ba18636 | 47 | __u32 vendor, device, subvendor=PCI_ANY_ID, |
1da177e4 LT |
48 | subdevice=PCI_ANY_ID, class=0, class_mask=0; |
49 | unsigned long driver_data=0; | |
50 | int fields=0; | |
b41d6cf3 | 51 | int retval; |
1da177e4 | 52 | |
b41d6cf3 | 53 | fields = sscanf(buf, "%x %x %x %x %x %x %lx", |
1da177e4 LT |
54 | &vendor, &device, &subvendor, &subdevice, |
55 | &class, &class_mask, &driver_data); | |
6ba18636 | 56 | if (fields < 2) |
1da177e4 LT |
57 | return -EINVAL; |
58 | ||
b41d6cf3 JD |
59 | /* Only accept driver_data values that match an existing id_table |
60 | entry */ | |
61 | retval = -EINVAL; | |
62 | while (ids->vendor || ids->subvendor || ids->class_mask) { | |
63 | if (driver_data == ids->driver_data) { | |
64 | retval = 0; | |
65 | break; | |
66 | } | |
67 | ids++; | |
68 | } | |
69 | if (retval) /* No match */ | |
70 | return retval; | |
71 | ||
f5afe806 | 72 | dynid = kzalloc(sizeof(*dynid), GFP_KERNEL); |
1da177e4 LT |
73 | if (!dynid) |
74 | return -ENOMEM; | |
75 | ||
1da177e4 LT |
76 | dynid->id.vendor = vendor; |
77 | dynid->id.device = device; | |
78 | dynid->id.subvendor = subvendor; | |
79 | dynid->id.subdevice = subdevice; | |
80 | dynid->id.class = class; | |
81 | dynid->id.class_mask = class_mask; | |
edbc25ca | 82 | dynid->id.driver_data = driver_data; |
1da177e4 LT |
83 | |
84 | spin_lock(&pdrv->dynids.lock); | |
a56bc69a | 85 | list_add_tail(&dynid->node, &pdrv->dynids.list); |
1da177e4 LT |
86 | spin_unlock(&pdrv->dynids.lock); |
87 | ||
75865858 | 88 | if (get_driver(&pdrv->driver)) { |
b19441af | 89 | retval = driver_attach(&pdrv->driver); |
75865858 | 90 | put_driver(&pdrv->driver); |
1da177e4 LT |
91 | } |
92 | ||
b19441af GKH |
93 | if (retval) |
94 | return retval; | |
1da177e4 LT |
95 | return count; |
96 | } | |
1da177e4 | 97 | static DRIVER_ATTR(new_id, S_IWUSR, NULL, store_new_id); |
1da177e4 LT |
98 | |
99 | static void | |
100 | pci_free_dynids(struct pci_driver *drv) | |
101 | { | |
75865858 | 102 | struct pci_dynid *dynid, *n; |
1da177e4 LT |
103 | |
104 | spin_lock(&drv->dynids.lock); | |
75865858 | 105 | list_for_each_entry_safe(dynid, n, &drv->dynids.list, node) { |
1da177e4 LT |
106 | list_del(&dynid->node); |
107 | kfree(dynid); | |
108 | } | |
109 | spin_unlock(&drv->dynids.lock); | |
110 | } | |
111 | ||
112 | static int | |
113 | pci_create_newid_file(struct pci_driver *drv) | |
114 | { | |
115 | int error = 0; | |
116 | if (drv->probe != NULL) | |
03d43b19 | 117 | error = driver_create_file(&drv->driver, &driver_attr_new_id); |
1da177e4 LT |
118 | return error; |
119 | } | |
120 | ||
03d43b19 GKH |
121 | static void pci_remove_newid_file(struct pci_driver *drv) |
122 | { | |
123 | driver_remove_file(&drv->driver, &driver_attr_new_id); | |
124 | } | |
1da177e4 | 125 | #else /* !CONFIG_HOTPLUG */ |
1da177e4 LT |
126 | static inline void pci_free_dynids(struct pci_driver *drv) {} |
127 | static inline int pci_create_newid_file(struct pci_driver *drv) | |
128 | { | |
129 | return 0; | |
130 | } | |
03d43b19 | 131 | static inline void pci_remove_newid_file(struct pci_driver *drv) {} |
1da177e4 LT |
132 | #endif |
133 | ||
134 | /** | |
75865858 | 135 | * pci_match_id - See if a pci device matches a given pci_id table |
1da177e4 | 136 | * @ids: array of PCI device id structures to search in |
75865858 GKH |
137 | * @dev: the PCI device structure to match against. |
138 | * | |
1da177e4 | 139 | * Used by a driver to check whether a PCI device present in the |
75865858 | 140 | * system is in its list of supported devices. Returns the matching |
1da177e4 | 141 | * pci_device_id structure or %NULL if there is no match. |
75865858 | 142 | * |
8b60756a | 143 | * Deprecated, don't use this as it will not catch any dynamic ids |
75865858 | 144 | * that a driver might want to check for. |
1da177e4 | 145 | */ |
75865858 GKH |
146 | const struct pci_device_id *pci_match_id(const struct pci_device_id *ids, |
147 | struct pci_dev *dev) | |
1da177e4 | 148 | { |
75865858 GKH |
149 | if (ids) { |
150 | while (ids->vendor || ids->subvendor || ids->class_mask) { | |
151 | if (pci_match_one_device(ids, dev)) | |
152 | return ids; | |
153 | ids++; | |
154 | } | |
1da177e4 LT |
155 | } |
156 | return NULL; | |
157 | } | |
158 | ||
159 | /** | |
ae9608af | 160 | * pci_match_device - Tell if a PCI device structure has a matching PCI device id structure |
75865858 | 161 | * @drv: the PCI driver to match against |
39ba487f | 162 | * @dev: the PCI device structure to match against |
75865858 GKH |
163 | * |
164 | * Used by a driver to check whether a PCI device present in the | |
165 | * system is in its list of supported devices. Returns the matching | |
166 | * pci_device_id structure or %NULL if there is no match. | |
1da177e4 | 167 | */ |
d73460d7 AB |
168 | static const struct pci_device_id *pci_match_device(struct pci_driver *drv, |
169 | struct pci_dev *dev) | |
75865858 | 170 | { |
75865858 | 171 | struct pci_dynid *dynid; |
1da177e4 | 172 | |
7461b60a | 173 | /* Look at the dynamic ids first, before the static ones */ |
75865858 GKH |
174 | spin_lock(&drv->dynids.lock); |
175 | list_for_each_entry(dynid, &drv->dynids.list, node) { | |
176 | if (pci_match_one_device(&dynid->id, dev)) { | |
177 | spin_unlock(&drv->dynids.lock); | |
178 | return &dynid->id; | |
179 | } | |
1da177e4 | 180 | } |
75865858 | 181 | spin_unlock(&drv->dynids.lock); |
7461b60a RK |
182 | |
183 | return pci_match_id(drv->id_table, dev); | |
1da177e4 LT |
184 | } |
185 | ||
d42c6997 AK |
186 | static int pci_call_probe(struct pci_driver *drv, struct pci_dev *dev, |
187 | const struct pci_device_id *id) | |
188 | { | |
189 | int error; | |
190 | #ifdef CONFIG_NUMA | |
191 | /* Execute driver initialization on node where the | |
192 | device's bus is attached to. This way the driver likely | |
193 | allocates its local memory on the right node without | |
194 | any need to change it. */ | |
195 | struct mempolicy *oldpol; | |
196 | cpumask_t oldmask = current->cpus_allowed; | |
4efeb4dd | 197 | int node = dev_to_node(&dev->dev); |
f70316da MT |
198 | |
199 | if (node >= 0) { | |
200 | node_to_cpumask_ptr(nodecpumask, node); | |
201 | set_cpus_allowed_ptr(current, nodecpumask); | |
202 | } | |
d42c6997 AK |
203 | /* And set default memory allocation policy */ |
204 | oldpol = current->mempolicy; | |
74e27e44 | 205 | current->mempolicy = NULL; /* fall back to system default policy */ |
d42c6997 AK |
206 | #endif |
207 | error = drv->probe(dev, id); | |
208 | #ifdef CONFIG_NUMA | |
f70316da | 209 | set_cpus_allowed_ptr(current, &oldmask); |
d42c6997 AK |
210 | current->mempolicy = oldpol; |
211 | #endif | |
212 | return error; | |
213 | } | |
214 | ||
1da177e4 LT |
215 | /** |
216 | * __pci_device_probe() | |
8f7020d3 RD |
217 | * @drv: driver to call to check if it wants the PCI device |
218 | * @pci_dev: PCI device being probed | |
1da177e4 | 219 | * |
8f7020d3 | 220 | * returns 0 on success, else error. |
1da177e4 LT |
221 | * side-effect: pci_dev->driver is set to drv when drv claims pci_dev. |
222 | */ | |
223 | static int | |
224 | __pci_device_probe(struct pci_driver *drv, struct pci_dev *pci_dev) | |
75865858 GKH |
225 | { |
226 | const struct pci_device_id *id; | |
1da177e4 LT |
227 | int error = 0; |
228 | ||
229 | if (!pci_dev->driver && drv->probe) { | |
75865858 GKH |
230 | error = -ENODEV; |
231 | ||
232 | id = pci_match_device(drv, pci_dev); | |
233 | if (id) | |
d42c6997 | 234 | error = pci_call_probe(drv, pci_dev, id); |
75865858 GKH |
235 | if (error >= 0) { |
236 | pci_dev->driver = drv; | |
237 | error = 0; | |
238 | } | |
1da177e4 LT |
239 | } |
240 | return error; | |
241 | } | |
242 | ||
243 | static int pci_device_probe(struct device * dev) | |
244 | { | |
245 | int error = 0; | |
246 | struct pci_driver *drv; | |
247 | struct pci_dev *pci_dev; | |
248 | ||
249 | drv = to_pci_driver(dev->driver); | |
250 | pci_dev = to_pci_dev(dev); | |
251 | pci_dev_get(pci_dev); | |
252 | error = __pci_device_probe(drv, pci_dev); | |
253 | if (error) | |
254 | pci_dev_put(pci_dev); | |
255 | ||
256 | return error; | |
257 | } | |
258 | ||
259 | static int pci_device_remove(struct device * dev) | |
260 | { | |
261 | struct pci_dev * pci_dev = to_pci_dev(dev); | |
262 | struct pci_driver * drv = pci_dev->driver; | |
263 | ||
264 | if (drv) { | |
265 | if (drv->remove) | |
266 | drv->remove(pci_dev); | |
267 | pci_dev->driver = NULL; | |
268 | } | |
269 | ||
2449e06a SL |
270 | /* |
271 | * If the device is still on, set the power state as "unknown", | |
272 | * since it might change by the next time we load the driver. | |
273 | */ | |
274 | if (pci_dev->current_state == PCI_D0) | |
275 | pci_dev->current_state = PCI_UNKNOWN; | |
276 | ||
1da177e4 LT |
277 | /* |
278 | * We would love to complain here if pci_dev->is_enabled is set, that | |
279 | * the driver should have called pci_disable_device(), but the | |
280 | * unfortunate fact is there are too many odd BIOS and bridge setups | |
281 | * that don't like drivers doing that all of the time. | |
282 | * Oh well, we can dream of sane hardware when we sleep, no matter how | |
283 | * horrible the crap we have to deal with is when we are awake... | |
284 | */ | |
285 | ||
286 | pci_dev_put(pci_dev); | |
287 | return 0; | |
288 | } | |
289 | ||
bbb44d9f RW |
290 | static void pci_device_shutdown(struct device *dev) |
291 | { | |
292 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
293 | struct pci_driver *drv = pci_dev->driver; | |
294 | ||
295 | if (drv && drv->shutdown) | |
296 | drv->shutdown(pci_dev); | |
297 | pci_msi_shutdown(pci_dev); | |
298 | pci_msix_shutdown(pci_dev); | |
299 | } | |
300 | ||
301 | #ifdef CONFIG_PM_SLEEP | |
302 | ||
303 | /* | |
304 | * Default "suspend" method for devices that have no driver provided suspend, | |
305 | * or not even a driver at all. | |
306 | */ | |
307 | static void pci_default_pm_suspend(struct pci_dev *pci_dev) | |
308 | { | |
309 | pci_save_state(pci_dev); | |
310 | /* | |
311 | * mark its power state as "unknown", since we don't know if | |
312 | * e.g. the BIOS will change its device state when we suspend. | |
313 | */ | |
314 | if (pci_dev->current_state == PCI_D0) | |
315 | pci_dev->current_state = PCI_UNKNOWN; | |
316 | } | |
317 | ||
318 | /* | |
319 | * Default "resume" method for devices that have no driver provided resume, | |
320 | * or not even a driver at all. | |
321 | */ | |
322 | static int pci_default_pm_resume(struct pci_dev *pci_dev) | |
323 | { | |
324 | int retval = 0; | |
325 | ||
326 | /* restore the PCI config space */ | |
327 | pci_restore_state(pci_dev); | |
328 | /* if the device was enabled before suspend, reenable */ | |
329 | retval = pci_reenable_device(pci_dev); | |
330 | /* | |
331 | * if the device was busmaster before the suspend, make it busmaster | |
332 | * again | |
333 | */ | |
334 | if (pci_dev->is_busmaster) | |
335 | pci_set_master(pci_dev); | |
336 | ||
337 | return retval; | |
338 | } | |
339 | ||
340 | static int pci_legacy_suspend(struct device *dev, pm_message_t state) | |
1da177e4 LT |
341 | { |
342 | struct pci_dev * pci_dev = to_pci_dev(dev); | |
343 | struct pci_driver * drv = pci_dev->driver; | |
344 | int i = 0; | |
345 | ||
02669492 | 346 | if (drv && drv->suspend) { |
1da177e4 | 347 | i = drv->suspend(pci_dev, state); |
02669492 AM |
348 | suspend_report_result(drv->suspend, i); |
349 | } else { | |
bbb44d9f | 350 | pci_default_pm_suspend(pci_dev); |
02669492 | 351 | } |
1da177e4 LT |
352 | return i; |
353 | } | |
354 | ||
bbb44d9f | 355 | static int pci_legacy_suspend_late(struct device *dev, pm_message_t state) |
cbd69dbb LT |
356 | { |
357 | struct pci_dev * pci_dev = to_pci_dev(dev); | |
358 | struct pci_driver * drv = pci_dev->driver; | |
359 | int i = 0; | |
360 | ||
361 | if (drv && drv->suspend_late) { | |
362 | i = drv->suspend_late(pci_dev, state); | |
363 | suspend_report_result(drv->suspend_late, i); | |
364 | } | |
365 | return i; | |
366 | } | |
1da177e4 | 367 | |
bbb44d9f | 368 | static int pci_legacy_resume(struct device *dev) |
1da177e4 | 369 | { |
8d92bc22 | 370 | int error; |
1da177e4 LT |
371 | struct pci_dev * pci_dev = to_pci_dev(dev); |
372 | struct pci_driver * drv = pci_dev->driver; | |
373 | ||
374 | if (drv && drv->resume) | |
8d92bc22 | 375 | error = drv->resume(pci_dev); |
1da177e4 | 376 | else |
bbb44d9f | 377 | error = pci_default_pm_resume(pci_dev); |
8d92bc22 | 378 | return error; |
1da177e4 LT |
379 | } |
380 | ||
bbb44d9f | 381 | static int pci_legacy_resume_early(struct device *dev) |
cbd69dbb LT |
382 | { |
383 | int error = 0; | |
384 | struct pci_dev * pci_dev = to_pci_dev(dev); | |
385 | struct pci_driver * drv = pci_dev->driver; | |
386 | ||
387 | if (drv && drv->resume_early) | |
388 | error = drv->resume_early(pci_dev); | |
389 | return error; | |
390 | } | |
391 | ||
bbb44d9f RW |
392 | static int pci_pm_prepare(struct device *dev) |
393 | { | |
394 | struct device_driver *drv = dev->driver; | |
395 | int error = 0; | |
396 | ||
397 | if (drv && drv->pm && drv->pm->prepare) | |
398 | error = drv->pm->prepare(dev); | |
399 | ||
400 | return error; | |
401 | } | |
402 | ||
403 | static void pci_pm_complete(struct device *dev) | |
404 | { | |
405 | struct device_driver *drv = dev->driver; | |
406 | ||
407 | if (drv && drv->pm && drv->pm->complete) | |
408 | drv->pm->complete(dev); | |
409 | } | |
410 | ||
411 | #ifdef CONFIG_SUSPEND | |
412 | ||
413 | static int pci_pm_suspend(struct device *dev) | |
414 | { | |
415 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
416 | struct device_driver *drv = dev->driver; | |
417 | int error = 0; | |
418 | ||
419 | if (drv && drv->pm) { | |
420 | if (drv->pm->suspend) { | |
421 | error = drv->pm->suspend(dev); | |
422 | suspend_report_result(drv->pm->suspend, error); | |
423 | } else { | |
424 | pci_default_pm_suspend(pci_dev); | |
425 | } | |
426 | } else { | |
427 | error = pci_legacy_suspend(dev, PMSG_SUSPEND); | |
428 | } | |
429 | pci_fixup_device(pci_fixup_suspend, pci_dev); | |
430 | ||
431 | return error; | |
432 | } | |
433 | ||
434 | static int pci_pm_suspend_noirq(struct device *dev) | |
c8958177 GK |
435 | { |
436 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
437 | struct pci_driver *drv = pci_dev->driver; | |
bbb44d9f | 438 | int error = 0; |
c8958177 | 439 | |
bbb44d9f RW |
440 | if (drv && drv->pm) { |
441 | if (drv->pm->suspend_noirq) { | |
442 | error = drv->pm->suspend_noirq(dev); | |
443 | suspend_report_result(drv->pm->suspend_noirq, error); | |
444 | } | |
445 | } else { | |
446 | error = pci_legacy_suspend_late(dev, PMSG_SUSPEND); | |
447 | } | |
448 | ||
449 | return error; | |
c8958177 | 450 | } |
1da177e4 | 451 | |
bbb44d9f RW |
452 | static int pci_pm_resume(struct device *dev) |
453 | { | |
454 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
455 | struct device_driver *drv = dev->driver; | |
456 | int error; | |
457 | ||
458 | pci_fixup_device(pci_fixup_resume, pci_dev); | |
459 | ||
460 | if (drv && drv->pm) { | |
461 | error = drv->pm->resume ? drv->pm->resume(dev) : | |
462 | pci_default_pm_resume(pci_dev); | |
463 | } else { | |
464 | error = pci_legacy_resume(dev); | |
465 | } | |
466 | ||
467 | return error; | |
468 | } | |
469 | ||
470 | static int pci_pm_resume_noirq(struct device *dev) | |
471 | { | |
472 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
473 | struct pci_driver *drv = pci_dev->driver; | |
474 | int error = 0; | |
475 | ||
476 | pci_fixup_device(pci_fixup_resume_early, pci_dev); | |
477 | ||
478 | if (drv && drv->pm) { | |
479 | if (drv->pm->resume_noirq) | |
480 | error = drv->pm->resume_noirq(dev); | |
481 | } else { | |
482 | error = pci_legacy_resume_early(dev); | |
483 | } | |
484 | ||
485 | return error; | |
486 | } | |
487 | ||
488 | #else /* !CONFIG_SUSPEND */ | |
489 | ||
490 | #define pci_pm_suspend NULL | |
491 | #define pci_pm_suspend_noirq NULL | |
492 | #define pci_pm_resume NULL | |
493 | #define pci_pm_resume_noirq NULL | |
494 | ||
495 | #endif /* !CONFIG_SUSPEND */ | |
496 | ||
497 | #ifdef CONFIG_HIBERNATION | |
498 | ||
499 | static int pci_pm_freeze(struct device *dev) | |
500 | { | |
501 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
502 | struct device_driver *drv = dev->driver; | |
503 | int error = 0; | |
504 | ||
505 | if (drv && drv->pm) { | |
506 | if (drv->pm->freeze) { | |
507 | error = drv->pm->freeze(dev); | |
508 | suspend_report_result(drv->pm->freeze, error); | |
509 | } else { | |
510 | pci_default_pm_suspend(pci_dev); | |
511 | } | |
512 | } else { | |
513 | error = pci_legacy_suspend(dev, PMSG_FREEZE); | |
514 | pci_fixup_device(pci_fixup_suspend, pci_dev); | |
515 | } | |
516 | ||
517 | return error; | |
518 | } | |
519 | ||
520 | static int pci_pm_freeze_noirq(struct device *dev) | |
521 | { | |
522 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
523 | struct pci_driver *drv = pci_dev->driver; | |
524 | int error = 0; | |
525 | ||
526 | if (drv && drv->pm) { | |
527 | if (drv->pm->freeze_noirq) { | |
528 | error = drv->pm->freeze_noirq(dev); | |
529 | suspend_report_result(drv->pm->freeze_noirq, error); | |
530 | } | |
531 | } else { | |
532 | error = pci_legacy_suspend_late(dev, PMSG_FREEZE); | |
533 | } | |
534 | ||
535 | return error; | |
536 | } | |
537 | ||
538 | static int pci_pm_thaw(struct device *dev) | |
539 | { | |
540 | struct device_driver *drv = dev->driver; | |
541 | int error = 0; | |
542 | ||
543 | if (drv && drv->pm) { | |
544 | if (drv->pm->thaw) | |
545 | error = drv->pm->thaw(dev); | |
546 | } else { | |
547 | pci_fixup_device(pci_fixup_resume, to_pci_dev(dev)); | |
548 | error = pci_legacy_resume(dev); | |
549 | } | |
550 | ||
551 | return error; | |
552 | } | |
553 | ||
554 | static int pci_pm_thaw_noirq(struct device *dev) | |
555 | { | |
556 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
557 | struct pci_driver *drv = pci_dev->driver; | |
558 | int error = 0; | |
559 | ||
560 | if (drv && drv->pm) { | |
561 | if (drv->pm->thaw_noirq) | |
562 | error = drv->pm->thaw_noirq(dev); | |
563 | } else { | |
564 | pci_fixup_device(pci_fixup_resume_early, pci_dev); | |
565 | error = pci_legacy_resume_early(dev); | |
566 | } | |
567 | ||
568 | return error; | |
569 | } | |
570 | ||
571 | static int pci_pm_poweroff(struct device *dev) | |
572 | { | |
573 | struct device_driver *drv = dev->driver; | |
574 | int error = 0; | |
575 | ||
576 | pci_fixup_device(pci_fixup_suspend, to_pci_dev(dev)); | |
577 | ||
578 | if (drv && drv->pm) { | |
579 | if (drv->pm->poweroff) { | |
580 | error = drv->pm->poweroff(dev); | |
581 | suspend_report_result(drv->pm->poweroff, error); | |
582 | } | |
583 | } else { | |
584 | error = pci_legacy_suspend(dev, PMSG_HIBERNATE); | |
585 | } | |
586 | ||
587 | return error; | |
588 | } | |
589 | ||
590 | static int pci_pm_poweroff_noirq(struct device *dev) | |
591 | { | |
592 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
593 | struct pci_driver *drv = pci_dev->driver; | |
594 | int error = 0; | |
595 | ||
596 | if (drv && drv->pm) { | |
597 | if (drv->pm->poweroff_noirq) { | |
598 | error = drv->pm->poweroff_noirq(dev); | |
599 | suspend_report_result(drv->pm->poweroff_noirq, error); | |
600 | } | |
601 | } else { | |
602 | error = pci_legacy_suspend_late(dev, PMSG_HIBERNATE); | |
603 | } | |
604 | ||
605 | return error; | |
606 | } | |
607 | ||
608 | static int pci_pm_restore(struct device *dev) | |
609 | { | |
610 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
611 | struct device_driver *drv = dev->driver; | |
612 | int error; | |
613 | ||
614 | if (drv && drv->pm) { | |
615 | error = drv->pm->restore ? drv->pm->restore(dev) : | |
616 | pci_default_pm_resume(pci_dev); | |
617 | } else { | |
618 | error = pci_legacy_resume(dev); | |
619 | } | |
620 | pci_fixup_device(pci_fixup_resume, pci_dev); | |
621 | ||
622 | return error; | |
623 | } | |
624 | ||
625 | static int pci_pm_restore_noirq(struct device *dev) | |
626 | { | |
627 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
628 | struct pci_driver *drv = pci_dev->driver; | |
629 | int error = 0; | |
630 | ||
631 | pci_fixup_device(pci_fixup_resume, pci_dev); | |
632 | ||
633 | if (drv && drv->pm) { | |
634 | if (drv->pm->restore_noirq) | |
635 | error = drv->pm->restore_noirq(dev); | |
636 | } else { | |
637 | error = pci_legacy_resume_early(dev); | |
638 | } | |
639 | pci_fixup_device(pci_fixup_resume_early, pci_dev); | |
640 | ||
641 | return error; | |
c8958177 | 642 | } |
1da177e4 | 643 | |
bbb44d9f RW |
644 | #else /* !CONFIG_HIBERNATION */ |
645 | ||
646 | #define pci_pm_freeze NULL | |
647 | #define pci_pm_freeze_noirq NULL | |
648 | #define pci_pm_thaw NULL | |
649 | #define pci_pm_thaw_noirq NULL | |
650 | #define pci_pm_poweroff NULL | |
651 | #define pci_pm_poweroff_noirq NULL | |
652 | #define pci_pm_restore NULL | |
653 | #define pci_pm_restore_noirq NULL | |
654 | ||
655 | #endif /* !CONFIG_HIBERNATION */ | |
656 | ||
657 | struct pm_ext_ops pci_pm_ops = { | |
658 | .base = { | |
659 | .prepare = pci_pm_prepare, | |
660 | .complete = pci_pm_complete, | |
661 | .suspend = pci_pm_suspend, | |
662 | .resume = pci_pm_resume, | |
663 | .freeze = pci_pm_freeze, | |
664 | .thaw = pci_pm_thaw, | |
665 | .poweroff = pci_pm_poweroff, | |
666 | .restore = pci_pm_restore, | |
667 | }, | |
668 | .suspend_noirq = pci_pm_suspend_noirq, | |
669 | .resume_noirq = pci_pm_resume_noirq, | |
670 | .freeze_noirq = pci_pm_freeze_noirq, | |
671 | .thaw_noirq = pci_pm_thaw_noirq, | |
672 | .poweroff_noirq = pci_pm_poweroff_noirq, | |
673 | .restore_noirq = pci_pm_restore_noirq, | |
674 | }; | |
675 | ||
676 | #define PCI_PM_OPS_PTR &pci_pm_ops | |
677 | ||
678 | #else /* !CONFIG_PM_SLEEP */ | |
679 | ||
680 | #define PCI_PM_OPS_PTR NULL | |
681 | ||
682 | #endif /* !CONFIG_PM_SLEEP */ | |
683 | ||
1da177e4 | 684 | /** |
863b18f4 | 685 | * __pci_register_driver - register a new pci driver |
1da177e4 | 686 | * @drv: the driver structure to register |
863b18f4 | 687 | * @owner: owner module of drv |
f95d882d | 688 | * @mod_name: module name string |
1da177e4 LT |
689 | * |
690 | * Adds the driver structure to the list of registered drivers. | |
691 | * Returns a negative value on error, otherwise 0. | |
eaae4b3a | 692 | * If no error occurred, the driver remains registered even if |
1da177e4 LT |
693 | * no device was claimed during registration. |
694 | */ | |
725522b5 GKH |
695 | int __pci_register_driver(struct pci_driver *drv, struct module *owner, |
696 | const char *mod_name) | |
1da177e4 LT |
697 | { |
698 | int error; | |
699 | ||
700 | /* initialize common driver fields */ | |
701 | drv->driver.name = drv->name; | |
702 | drv->driver.bus = &pci_bus_type; | |
863b18f4 | 703 | drv->driver.owner = owner; |
725522b5 | 704 | drv->driver.mod_name = mod_name; |
50b00755 | 705 | |
bbb44d9f RW |
706 | if (drv->pm) |
707 | drv->driver.pm = &drv->pm->base; | |
708 | ||
75865858 GKH |
709 | spin_lock_init(&drv->dynids.lock); |
710 | INIT_LIST_HEAD(&drv->dynids.list); | |
1da177e4 LT |
711 | |
712 | /* register with core */ | |
713 | error = driver_register(&drv->driver); | |
50bf14b3 AM |
714 | if (error) |
715 | return error; | |
1da177e4 | 716 | |
50bf14b3 AM |
717 | error = pci_create_newid_file(drv); |
718 | if (error) | |
719 | driver_unregister(&drv->driver); | |
1da177e4 LT |
720 | |
721 | return error; | |
722 | } | |
723 | ||
724 | /** | |
725 | * pci_unregister_driver - unregister a pci driver | |
726 | * @drv: the driver structure to unregister | |
727 | * | |
728 | * Deletes the driver structure from the list of registered PCI drivers, | |
729 | * gives it a chance to clean up by calling its remove() function for | |
730 | * each device it was responsible for, and marks those devices as | |
731 | * driverless. | |
732 | */ | |
733 | ||
734 | void | |
735 | pci_unregister_driver(struct pci_driver *drv) | |
736 | { | |
03d43b19 | 737 | pci_remove_newid_file(drv); |
1da177e4 LT |
738 | driver_unregister(&drv->driver); |
739 | pci_free_dynids(drv); | |
740 | } | |
741 | ||
742 | static struct pci_driver pci_compat_driver = { | |
743 | .name = "compat" | |
744 | }; | |
745 | ||
746 | /** | |
747 | * pci_dev_driver - get the pci_driver of a device | |
748 | * @dev: the device to query | |
749 | * | |
750 | * Returns the appropriate pci_driver structure or %NULL if there is no | |
751 | * registered driver for the device. | |
752 | */ | |
753 | struct pci_driver * | |
754 | pci_dev_driver(const struct pci_dev *dev) | |
755 | { | |
756 | if (dev->driver) | |
757 | return dev->driver; | |
758 | else { | |
759 | int i; | |
760 | for(i=0; i<=PCI_ROM_RESOURCE; i++) | |
761 | if (dev->resource[i].flags & IORESOURCE_BUSY) | |
762 | return &pci_compat_driver; | |
763 | } | |
764 | return NULL; | |
765 | } | |
766 | ||
767 | /** | |
768 | * pci_bus_match - Tell if a PCI device structure has a matching PCI device id structure | |
1da177e4 | 769 | * @dev: the PCI device structure to match against |
8f7020d3 | 770 | * @drv: the device driver to search for matching PCI device id structures |
1da177e4 LT |
771 | * |
772 | * Used by a driver to check whether a PCI device present in the | |
8f7020d3 | 773 | * system is in its list of supported devices. Returns the matching |
1da177e4 LT |
774 | * pci_device_id structure or %NULL if there is no match. |
775 | */ | |
75865858 | 776 | static int pci_bus_match(struct device *dev, struct device_driver *drv) |
1da177e4 | 777 | { |
75865858 GKH |
778 | struct pci_dev *pci_dev = to_pci_dev(dev); |
779 | struct pci_driver *pci_drv = to_pci_driver(drv); | |
1da177e4 LT |
780 | const struct pci_device_id *found_id; |
781 | ||
75865858 | 782 | found_id = pci_match_device(pci_drv, pci_dev); |
1da177e4 LT |
783 | if (found_id) |
784 | return 1; | |
785 | ||
75865858 | 786 | return 0; |
1da177e4 LT |
787 | } |
788 | ||
789 | /** | |
790 | * pci_dev_get - increments the reference count of the pci device structure | |
791 | * @dev: the device being referenced | |
792 | * | |
793 | * Each live reference to a device should be refcounted. | |
794 | * | |
795 | * Drivers for PCI devices should normally record such references in | |
796 | * their probe() methods, when they bind to a device, and release | |
797 | * them by calling pci_dev_put(), in their disconnect() methods. | |
798 | * | |
799 | * A pointer to the device with the incremented reference counter is returned. | |
800 | */ | |
801 | struct pci_dev *pci_dev_get(struct pci_dev *dev) | |
802 | { | |
803 | if (dev) | |
804 | get_device(&dev->dev); | |
805 | return dev; | |
806 | } | |
807 | ||
808 | /** | |
809 | * pci_dev_put - release a use of the pci device structure | |
810 | * @dev: device that's been disconnected | |
811 | * | |
812 | * Must be called when a user of a device is finished with it. When the last | |
813 | * user of the device calls this function, the memory of the device is freed. | |
814 | */ | |
815 | void pci_dev_put(struct pci_dev *dev) | |
816 | { | |
817 | if (dev) | |
818 | put_device(&dev->dev); | |
819 | } | |
820 | ||
821 | #ifndef CONFIG_HOTPLUG | |
7eff2e7a | 822 | int pci_uevent(struct device *dev, struct kobj_uevent_env *env) |
1da177e4 LT |
823 | { |
824 | return -ENODEV; | |
825 | } | |
826 | #endif | |
827 | ||
828 | struct bus_type pci_bus_type = { | |
829 | .name = "pci", | |
830 | .match = pci_bus_match, | |
312c004d | 831 | .uevent = pci_uevent, |
b15d686a RK |
832 | .probe = pci_device_probe, |
833 | .remove = pci_device_remove, | |
cbd69dbb | 834 | .shutdown = pci_device_shutdown, |
1da177e4 | 835 | .dev_attrs = pci_dev_attrs, |
bbb44d9f | 836 | .pm = PCI_PM_OPS_PTR, |
1da177e4 LT |
837 | }; |
838 | ||
839 | static int __init pci_driver_init(void) | |
840 | { | |
841 | return bus_register(&pci_bus_type); | |
842 | } | |
843 | ||
844 | postcore_initcall(pci_driver_init); | |
845 | ||
75865858 | 846 | EXPORT_SYMBOL(pci_match_id); |
863b18f4 | 847 | EXPORT_SYMBOL(__pci_register_driver); |
1da177e4 LT |
848 | EXPORT_SYMBOL(pci_unregister_driver); |
849 | EXPORT_SYMBOL(pci_dev_driver); | |
850 | EXPORT_SYMBOL(pci_bus_type); | |
851 | EXPORT_SYMBOL(pci_dev_get); | |
852 | EXPORT_SYMBOL(pci_dev_put); |