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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> |
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 GKH |
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 | ||
355a72d7 RW |
303 | static bool pci_has_legacy_pm_support(struct pci_dev *pci_dev) |
304 | { | |
305 | struct pci_driver *drv = pci_dev->driver; | |
306 | ||
307 | return drv && (drv->suspend || drv->suspend_late || drv->resume | |
308 | || drv->resume_early); | |
309 | } | |
310 | ||
bbb44d9f RW |
311 | /* |
312 | * Default "suspend" method for devices that have no driver provided suspend, | |
313 | * or not even a driver at all. | |
314 | */ | |
315 | static void pci_default_pm_suspend(struct pci_dev *pci_dev) | |
316 | { | |
317 | pci_save_state(pci_dev); | |
318 | /* | |
319 | * mark its power state as "unknown", since we don't know if | |
320 | * e.g. the BIOS will change its device state when we suspend. | |
321 | */ | |
322 | if (pci_dev->current_state == PCI_D0) | |
323 | pci_dev->current_state = PCI_UNKNOWN; | |
324 | } | |
325 | ||
326 | /* | |
327 | * Default "resume" method for devices that have no driver provided resume, | |
355a72d7 | 328 | * or not even a driver at all (first part). |
bbb44d9f | 329 | */ |
355a72d7 | 330 | static void pci_default_pm_resume_early(struct pci_dev *pci_dev) |
bbb44d9f | 331 | { |
bbb44d9f RW |
332 | /* restore the PCI config space */ |
333 | pci_restore_state(pci_dev); | |
355a72d7 RW |
334 | } |
335 | ||
336 | /* | |
337 | * Default "resume" method for devices that have no driver provided resume, | |
338 | * or not even a driver at all (second part). | |
339 | */ | |
340 | static int pci_default_pm_resume_late(struct pci_dev *pci_dev) | |
341 | { | |
342 | int retval; | |
343 | ||
bbb44d9f RW |
344 | /* if the device was enabled before suspend, reenable */ |
345 | retval = pci_reenable_device(pci_dev); | |
346 | /* | |
347 | * if the device was busmaster before the suspend, make it busmaster | |
348 | * again | |
349 | */ | |
350 | if (pci_dev->is_busmaster) | |
351 | pci_set_master(pci_dev); | |
352 | ||
353 | return retval; | |
354 | } | |
355 | ||
356 | static int pci_legacy_suspend(struct device *dev, pm_message_t state) | |
1da177e4 LT |
357 | { |
358 | struct pci_dev * pci_dev = to_pci_dev(dev); | |
359 | struct pci_driver * drv = pci_dev->driver; | |
360 | int i = 0; | |
361 | ||
02669492 | 362 | if (drv && drv->suspend) { |
1da177e4 | 363 | i = drv->suspend(pci_dev, state); |
02669492 AM |
364 | suspend_report_result(drv->suspend, i); |
365 | } else { | |
bbb44d9f | 366 | pci_default_pm_suspend(pci_dev); |
02669492 | 367 | } |
1da177e4 LT |
368 | return i; |
369 | } | |
370 | ||
bbb44d9f | 371 | static int pci_legacy_suspend_late(struct device *dev, pm_message_t state) |
cbd69dbb LT |
372 | { |
373 | struct pci_dev * pci_dev = to_pci_dev(dev); | |
374 | struct pci_driver * drv = pci_dev->driver; | |
375 | int i = 0; | |
376 | ||
377 | if (drv && drv->suspend_late) { | |
378 | i = drv->suspend_late(pci_dev, state); | |
379 | suspend_report_result(drv->suspend_late, i); | |
380 | } | |
381 | return i; | |
382 | } | |
1da177e4 | 383 | |
bbb44d9f | 384 | static int pci_legacy_resume(struct device *dev) |
1da177e4 | 385 | { |
8d92bc22 | 386 | int error; |
1da177e4 LT |
387 | struct pci_dev * pci_dev = to_pci_dev(dev); |
388 | struct pci_driver * drv = pci_dev->driver; | |
389 | ||
355a72d7 | 390 | if (drv && drv->resume) { |
8d92bc22 | 391 | error = drv->resume(pci_dev); |
355a72d7 RW |
392 | } else { |
393 | pci_default_pm_resume_early(pci_dev); | |
394 | error = pci_default_pm_resume_late(pci_dev); | |
395 | } | |
8d92bc22 | 396 | return error; |
1da177e4 LT |
397 | } |
398 | ||
bbb44d9f | 399 | static int pci_legacy_resume_early(struct device *dev) |
cbd69dbb LT |
400 | { |
401 | int error = 0; | |
402 | struct pci_dev * pci_dev = to_pci_dev(dev); | |
403 | struct pci_driver * drv = pci_dev->driver; | |
404 | ||
405 | if (drv && drv->resume_early) | |
406 | error = drv->resume_early(pci_dev); | |
407 | return error; | |
408 | } | |
409 | ||
bbb44d9f RW |
410 | static int pci_pm_prepare(struct device *dev) |
411 | { | |
412 | struct device_driver *drv = dev->driver; | |
413 | int error = 0; | |
414 | ||
415 | if (drv && drv->pm && drv->pm->prepare) | |
416 | error = drv->pm->prepare(dev); | |
417 | ||
418 | return error; | |
419 | } | |
420 | ||
421 | static void pci_pm_complete(struct device *dev) | |
422 | { | |
423 | struct device_driver *drv = dev->driver; | |
424 | ||
425 | if (drv && drv->pm && drv->pm->complete) | |
426 | drv->pm->complete(dev); | |
427 | } | |
428 | ||
429 | #ifdef CONFIG_SUSPEND | |
430 | ||
431 | static int pci_pm_suspend(struct device *dev) | |
432 | { | |
433 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
434 | struct device_driver *drv = dev->driver; | |
435 | int error = 0; | |
436 | ||
437 | if (drv && drv->pm) { | |
438 | if (drv->pm->suspend) { | |
439 | error = drv->pm->suspend(dev); | |
440 | suspend_report_result(drv->pm->suspend, error); | |
bbb44d9f | 441 | } |
355a72d7 | 442 | } else if (pci_has_legacy_pm_support(pci_dev)) { |
bbb44d9f RW |
443 | error = pci_legacy_suspend(dev, PMSG_SUSPEND); |
444 | } | |
445 | pci_fixup_device(pci_fixup_suspend, pci_dev); | |
446 | ||
447 | return error; | |
448 | } | |
449 | ||
450 | static int pci_pm_suspend_noirq(struct device *dev) | |
c8958177 | 451 | { |
355a72d7 | 452 | struct pci_dev *pci_dev = to_pci_dev(dev); |
adf09493 | 453 | struct device_driver *drv = dev->driver; |
bbb44d9f | 454 | int error = 0; |
c8958177 | 455 | |
bbb44d9f RW |
456 | if (drv && drv->pm) { |
457 | if (drv->pm->suspend_noirq) { | |
458 | error = drv->pm->suspend_noirq(dev); | |
459 | suspend_report_result(drv->pm->suspend_noirq, error); | |
460 | } | |
355a72d7 | 461 | } else if (pci_has_legacy_pm_support(pci_dev)) { |
bbb44d9f | 462 | error = pci_legacy_suspend_late(dev, PMSG_SUSPEND); |
355a72d7 RW |
463 | } else { |
464 | pci_default_pm_suspend(pci_dev); | |
bbb44d9f RW |
465 | } |
466 | ||
467 | return error; | |
c8958177 | 468 | } |
1da177e4 | 469 | |
bbb44d9f RW |
470 | static int pci_pm_resume(struct device *dev) |
471 | { | |
472 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
473 | struct device_driver *drv = dev->driver; | |
355a72d7 | 474 | int error = 0; |
bbb44d9f RW |
475 | |
476 | pci_fixup_device(pci_fixup_resume, pci_dev); | |
477 | ||
478 | if (drv && drv->pm) { | |
355a72d7 RW |
479 | if (drv->pm->resume) |
480 | error = drv->pm->resume(dev); | |
481 | } else if (pci_has_legacy_pm_support(pci_dev)) { | |
bbb44d9f | 482 | error = pci_legacy_resume(dev); |
355a72d7 RW |
483 | } else { |
484 | error = pci_default_pm_resume_late(pci_dev); | |
bbb44d9f RW |
485 | } |
486 | ||
487 | return error; | |
488 | } | |
489 | ||
490 | static int pci_pm_resume_noirq(struct device *dev) | |
491 | { | |
355a72d7 | 492 | struct pci_dev *pci_dev = to_pci_dev(dev); |
adf09493 | 493 | struct device_driver *drv = dev->driver; |
bbb44d9f RW |
494 | int error = 0; |
495 | ||
adf09493 | 496 | pci_fixup_device(pci_fixup_resume_early, to_pci_dev(dev)); |
bbb44d9f RW |
497 | |
498 | if (drv && drv->pm) { | |
499 | if (drv->pm->resume_noirq) | |
500 | error = drv->pm->resume_noirq(dev); | |
355a72d7 | 501 | } else if (pci_has_legacy_pm_support(pci_dev)) { |
bbb44d9f | 502 | error = pci_legacy_resume_early(dev); |
355a72d7 RW |
503 | } else { |
504 | pci_default_pm_resume_early(pci_dev); | |
bbb44d9f RW |
505 | } |
506 | ||
507 | return error; | |
508 | } | |
509 | ||
510 | #else /* !CONFIG_SUSPEND */ | |
511 | ||
512 | #define pci_pm_suspend NULL | |
513 | #define pci_pm_suspend_noirq NULL | |
514 | #define pci_pm_resume NULL | |
515 | #define pci_pm_resume_noirq NULL | |
516 | ||
517 | #endif /* !CONFIG_SUSPEND */ | |
518 | ||
519 | #ifdef CONFIG_HIBERNATION | |
520 | ||
521 | static int pci_pm_freeze(struct device *dev) | |
522 | { | |
523 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
524 | struct device_driver *drv = dev->driver; | |
525 | int error = 0; | |
526 | ||
527 | if (drv && drv->pm) { | |
528 | if (drv->pm->freeze) { | |
529 | error = drv->pm->freeze(dev); | |
530 | suspend_report_result(drv->pm->freeze, error); | |
bbb44d9f | 531 | } |
355a72d7 | 532 | } else if (pci_has_legacy_pm_support(pci_dev)) { |
bbb44d9f RW |
533 | error = pci_legacy_suspend(dev, PMSG_FREEZE); |
534 | pci_fixup_device(pci_fixup_suspend, pci_dev); | |
535 | } | |
536 | ||
537 | return error; | |
538 | } | |
539 | ||
540 | static int pci_pm_freeze_noirq(struct device *dev) | |
541 | { | |
355a72d7 | 542 | struct pci_dev *pci_dev = to_pci_dev(dev); |
adf09493 | 543 | struct device_driver *drv = dev->driver; |
bbb44d9f RW |
544 | int error = 0; |
545 | ||
546 | if (drv && drv->pm) { | |
547 | if (drv->pm->freeze_noirq) { | |
548 | error = drv->pm->freeze_noirq(dev); | |
549 | suspend_report_result(drv->pm->freeze_noirq, error); | |
550 | } | |
355a72d7 | 551 | } else if (pci_has_legacy_pm_support(pci_dev)) { |
bbb44d9f | 552 | error = pci_legacy_suspend_late(dev, PMSG_FREEZE); |
355a72d7 RW |
553 | } else { |
554 | pci_default_pm_suspend(pci_dev); | |
bbb44d9f RW |
555 | } |
556 | ||
557 | return error; | |
558 | } | |
559 | ||
560 | static int pci_pm_thaw(struct device *dev) | |
561 | { | |
355a72d7 | 562 | struct pci_dev *pci_dev = to_pci_dev(dev); |
bbb44d9f RW |
563 | struct device_driver *drv = dev->driver; |
564 | int error = 0; | |
565 | ||
566 | if (drv && drv->pm) { | |
567 | if (drv->pm->thaw) | |
568 | error = drv->pm->thaw(dev); | |
355a72d7 RW |
569 | } else if (pci_has_legacy_pm_support(pci_dev)) { |
570 | pci_fixup_device(pci_fixup_resume, pci_dev); | |
bbb44d9f RW |
571 | error = pci_legacy_resume(dev); |
572 | } | |
573 | ||
574 | return error; | |
575 | } | |
576 | ||
577 | static int pci_pm_thaw_noirq(struct device *dev) | |
578 | { | |
355a72d7 | 579 | struct pci_dev *pci_dev = to_pci_dev(dev); |
adf09493 | 580 | struct device_driver *drv = dev->driver; |
bbb44d9f RW |
581 | int error = 0; |
582 | ||
583 | if (drv && drv->pm) { | |
584 | if (drv->pm->thaw_noirq) | |
585 | error = drv->pm->thaw_noirq(dev); | |
355a72d7 | 586 | } else if (pci_has_legacy_pm_support(pci_dev)) { |
adf09493 | 587 | pci_fixup_device(pci_fixup_resume_early, to_pci_dev(dev)); |
bbb44d9f RW |
588 | error = pci_legacy_resume_early(dev); |
589 | } | |
590 | ||
591 | return error; | |
592 | } | |
593 | ||
594 | static int pci_pm_poweroff(struct device *dev) | |
595 | { | |
355a72d7 | 596 | struct pci_dev *pci_dev = to_pci_dev(dev); |
bbb44d9f RW |
597 | struct device_driver *drv = dev->driver; |
598 | int error = 0; | |
599 | ||
355a72d7 | 600 | pci_fixup_device(pci_fixup_suspend, pci_dev); |
bbb44d9f RW |
601 | |
602 | if (drv && drv->pm) { | |
603 | if (drv->pm->poweroff) { | |
604 | error = drv->pm->poweroff(dev); | |
605 | suspend_report_result(drv->pm->poweroff, error); | |
606 | } | |
355a72d7 | 607 | } else if (pci_has_legacy_pm_support(pci_dev)) { |
bbb44d9f RW |
608 | error = pci_legacy_suspend(dev, PMSG_HIBERNATE); |
609 | } | |
610 | ||
611 | return error; | |
612 | } | |
613 | ||
614 | static int pci_pm_poweroff_noirq(struct device *dev) | |
615 | { | |
adf09493 | 616 | struct device_driver *drv = dev->driver; |
bbb44d9f RW |
617 | int error = 0; |
618 | ||
619 | if (drv && drv->pm) { | |
620 | if (drv->pm->poweroff_noirq) { | |
621 | error = drv->pm->poweroff_noirq(dev); | |
622 | suspend_report_result(drv->pm->poweroff_noirq, error); | |
623 | } | |
355a72d7 | 624 | } else if (pci_has_legacy_pm_support(to_pci_dev(dev))) { |
bbb44d9f RW |
625 | error = pci_legacy_suspend_late(dev, PMSG_HIBERNATE); |
626 | } | |
627 | ||
628 | return error; | |
629 | } | |
630 | ||
631 | static int pci_pm_restore(struct device *dev) | |
632 | { | |
633 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
634 | struct device_driver *drv = dev->driver; | |
355a72d7 | 635 | int error = 0; |
bbb44d9f RW |
636 | |
637 | if (drv && drv->pm) { | |
355a72d7 RW |
638 | if (drv->pm->restore) |
639 | error = drv->pm->restore(dev); | |
640 | } else if (pci_has_legacy_pm_support(pci_dev)) { | |
bbb44d9f | 641 | error = pci_legacy_resume(dev); |
355a72d7 RW |
642 | } else { |
643 | error = pci_default_pm_resume_late(pci_dev); | |
bbb44d9f RW |
644 | } |
645 | pci_fixup_device(pci_fixup_resume, pci_dev); | |
646 | ||
647 | return error; | |
648 | } | |
649 | ||
650 | static int pci_pm_restore_noirq(struct device *dev) | |
651 | { | |
652 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
adf09493 | 653 | struct device_driver *drv = dev->driver; |
bbb44d9f RW |
654 | int error = 0; |
655 | ||
656 | pci_fixup_device(pci_fixup_resume, pci_dev); | |
657 | ||
658 | if (drv && drv->pm) { | |
659 | if (drv->pm->restore_noirq) | |
660 | error = drv->pm->restore_noirq(dev); | |
355a72d7 | 661 | } else if (pci_has_legacy_pm_support(pci_dev)) { |
bbb44d9f | 662 | error = pci_legacy_resume_early(dev); |
355a72d7 RW |
663 | } else { |
664 | pci_default_pm_resume_early(pci_dev); | |
bbb44d9f RW |
665 | } |
666 | pci_fixup_device(pci_fixup_resume_early, pci_dev); | |
667 | ||
668 | return error; | |
c8958177 | 669 | } |
1da177e4 | 670 | |
bbb44d9f RW |
671 | #else /* !CONFIG_HIBERNATION */ |
672 | ||
673 | #define pci_pm_freeze NULL | |
674 | #define pci_pm_freeze_noirq NULL | |
675 | #define pci_pm_thaw NULL | |
676 | #define pci_pm_thaw_noirq NULL | |
677 | #define pci_pm_poweroff NULL | |
678 | #define pci_pm_poweroff_noirq NULL | |
679 | #define pci_pm_restore NULL | |
680 | #define pci_pm_restore_noirq NULL | |
681 | ||
682 | #endif /* !CONFIG_HIBERNATION */ | |
683 | ||
adf09493 RW |
684 | struct dev_pm_ops pci_dev_pm_ops = { |
685 | .prepare = pci_pm_prepare, | |
686 | .complete = pci_pm_complete, | |
687 | .suspend = pci_pm_suspend, | |
688 | .resume = pci_pm_resume, | |
689 | .freeze = pci_pm_freeze, | |
690 | .thaw = pci_pm_thaw, | |
691 | .poweroff = pci_pm_poweroff, | |
692 | .restore = pci_pm_restore, | |
bbb44d9f RW |
693 | .suspend_noirq = pci_pm_suspend_noirq, |
694 | .resume_noirq = pci_pm_resume_noirq, | |
695 | .freeze_noirq = pci_pm_freeze_noirq, | |
696 | .thaw_noirq = pci_pm_thaw_noirq, | |
697 | .poweroff_noirq = pci_pm_poweroff_noirq, | |
698 | .restore_noirq = pci_pm_restore_noirq, | |
699 | }; | |
700 | ||
adf09493 | 701 | #define PCI_PM_OPS_PTR (&pci_dev_pm_ops) |
bbb44d9f RW |
702 | |
703 | #else /* !CONFIG_PM_SLEEP */ | |
704 | ||
705 | #define PCI_PM_OPS_PTR NULL | |
706 | ||
707 | #endif /* !CONFIG_PM_SLEEP */ | |
708 | ||
1da177e4 | 709 | /** |
863b18f4 | 710 | * __pci_register_driver - register a new pci driver |
1da177e4 | 711 | * @drv: the driver structure to register |
863b18f4 | 712 | * @owner: owner module of drv |
f95d882d | 713 | * @mod_name: module name string |
1da177e4 LT |
714 | * |
715 | * Adds the driver structure to the list of registered drivers. | |
716 | * Returns a negative value on error, otherwise 0. | |
eaae4b3a | 717 | * If no error occurred, the driver remains registered even if |
1da177e4 LT |
718 | * no device was claimed during registration. |
719 | */ | |
725522b5 GKH |
720 | int __pci_register_driver(struct pci_driver *drv, struct module *owner, |
721 | const char *mod_name) | |
1da177e4 LT |
722 | { |
723 | int error; | |
724 | ||
725 | /* initialize common driver fields */ | |
726 | drv->driver.name = drv->name; | |
727 | drv->driver.bus = &pci_bus_type; | |
863b18f4 | 728 | drv->driver.owner = owner; |
725522b5 | 729 | drv->driver.mod_name = mod_name; |
50b00755 | 730 | |
75865858 GKH |
731 | spin_lock_init(&drv->dynids.lock); |
732 | INIT_LIST_HEAD(&drv->dynids.list); | |
1da177e4 LT |
733 | |
734 | /* register with core */ | |
735 | error = driver_register(&drv->driver); | |
50bf14b3 AM |
736 | if (error) |
737 | return error; | |
1da177e4 | 738 | |
50bf14b3 AM |
739 | error = pci_create_newid_file(drv); |
740 | if (error) | |
741 | driver_unregister(&drv->driver); | |
1da177e4 LT |
742 | |
743 | return error; | |
744 | } | |
745 | ||
746 | /** | |
747 | * pci_unregister_driver - unregister a pci driver | |
748 | * @drv: the driver structure to unregister | |
749 | * | |
750 | * Deletes the driver structure from the list of registered PCI drivers, | |
751 | * gives it a chance to clean up by calling its remove() function for | |
752 | * each device it was responsible for, and marks those devices as | |
753 | * driverless. | |
754 | */ | |
755 | ||
756 | void | |
757 | pci_unregister_driver(struct pci_driver *drv) | |
758 | { | |
03d43b19 | 759 | pci_remove_newid_file(drv); |
1da177e4 LT |
760 | driver_unregister(&drv->driver); |
761 | pci_free_dynids(drv); | |
762 | } | |
763 | ||
764 | static struct pci_driver pci_compat_driver = { | |
765 | .name = "compat" | |
766 | }; | |
767 | ||
768 | /** | |
769 | * pci_dev_driver - get the pci_driver of a device | |
770 | * @dev: the device to query | |
771 | * | |
772 | * Returns the appropriate pci_driver structure or %NULL if there is no | |
773 | * registered driver for the device. | |
774 | */ | |
775 | struct pci_driver * | |
776 | pci_dev_driver(const struct pci_dev *dev) | |
777 | { | |
778 | if (dev->driver) | |
779 | return dev->driver; | |
780 | else { | |
781 | int i; | |
782 | for(i=0; i<=PCI_ROM_RESOURCE; i++) | |
783 | if (dev->resource[i].flags & IORESOURCE_BUSY) | |
784 | return &pci_compat_driver; | |
785 | } | |
786 | return NULL; | |
787 | } | |
788 | ||
789 | /** | |
790 | * pci_bus_match - Tell if a PCI device structure has a matching PCI device id structure | |
1da177e4 | 791 | * @dev: the PCI device structure to match against |
8f7020d3 | 792 | * @drv: the device driver to search for matching PCI device id structures |
1da177e4 LT |
793 | * |
794 | * Used by a driver to check whether a PCI device present in the | |
8f7020d3 | 795 | * system is in its list of supported devices. Returns the matching |
1da177e4 LT |
796 | * pci_device_id structure or %NULL if there is no match. |
797 | */ | |
75865858 | 798 | static int pci_bus_match(struct device *dev, struct device_driver *drv) |
1da177e4 | 799 | { |
75865858 GKH |
800 | struct pci_dev *pci_dev = to_pci_dev(dev); |
801 | struct pci_driver *pci_drv = to_pci_driver(drv); | |
1da177e4 LT |
802 | const struct pci_device_id *found_id; |
803 | ||
75865858 | 804 | found_id = pci_match_device(pci_drv, pci_dev); |
1da177e4 LT |
805 | if (found_id) |
806 | return 1; | |
807 | ||
75865858 | 808 | return 0; |
1da177e4 LT |
809 | } |
810 | ||
811 | /** | |
812 | * pci_dev_get - increments the reference count of the pci device structure | |
813 | * @dev: the device being referenced | |
814 | * | |
815 | * Each live reference to a device should be refcounted. | |
816 | * | |
817 | * Drivers for PCI devices should normally record such references in | |
818 | * their probe() methods, when they bind to a device, and release | |
819 | * them by calling pci_dev_put(), in their disconnect() methods. | |
820 | * | |
821 | * A pointer to the device with the incremented reference counter is returned. | |
822 | */ | |
823 | struct pci_dev *pci_dev_get(struct pci_dev *dev) | |
824 | { | |
825 | if (dev) | |
826 | get_device(&dev->dev); | |
827 | return dev; | |
828 | } | |
829 | ||
830 | /** | |
831 | * pci_dev_put - release a use of the pci device structure | |
832 | * @dev: device that's been disconnected | |
833 | * | |
834 | * Must be called when a user of a device is finished with it. When the last | |
835 | * user of the device calls this function, the memory of the device is freed. | |
836 | */ | |
837 | void pci_dev_put(struct pci_dev *dev) | |
838 | { | |
839 | if (dev) | |
840 | put_device(&dev->dev); | |
841 | } | |
842 | ||
843 | #ifndef CONFIG_HOTPLUG | |
7eff2e7a | 844 | int pci_uevent(struct device *dev, struct kobj_uevent_env *env) |
1da177e4 LT |
845 | { |
846 | return -ENODEV; | |
847 | } | |
848 | #endif | |
849 | ||
850 | struct bus_type pci_bus_type = { | |
851 | .name = "pci", | |
852 | .match = pci_bus_match, | |
312c004d | 853 | .uevent = pci_uevent, |
b15d686a RK |
854 | .probe = pci_device_probe, |
855 | .remove = pci_device_remove, | |
cbd69dbb | 856 | .shutdown = pci_device_shutdown, |
1da177e4 | 857 | .dev_attrs = pci_dev_attrs, |
bbb44d9f | 858 | .pm = PCI_PM_OPS_PTR, |
1da177e4 LT |
859 | }; |
860 | ||
861 | static int __init pci_driver_init(void) | |
862 | { | |
863 | return bus_register(&pci_bus_type); | |
864 | } | |
865 | ||
866 | postcore_initcall(pci_driver_init); | |
867 | ||
75865858 | 868 | EXPORT_SYMBOL(pci_match_id); |
863b18f4 | 869 | EXPORT_SYMBOL(__pci_register_driver); |
1da177e4 LT |
870 | EXPORT_SYMBOL(pci_unregister_driver); |
871 | EXPORT_SYMBOL(pci_dev_driver); | |
872 | EXPORT_SYMBOL(pci_bus_type); | |
873 | EXPORT_SYMBOL(pci_dev_get); | |
874 | EXPORT_SYMBOL(pci_dev_put); |