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