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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; | |
57ef8026 | 355 | int error = 0; |
1da177e4 | 356 | |
02669492 | 357 | if (drv && drv->suspend) { |
99dadce8 RW |
358 | pci_power_t prev = pci_dev->current_state; |
359 | ||
aa8c6c93 RW |
360 | pci_dev->state_saved = false; |
361 | ||
57ef8026 FP |
362 | error = drv->suspend(pci_dev, state); |
363 | suspend_report_result(drv->suspend, error); | |
364 | if (error) | |
365 | return error; | |
aa8c6c93 RW |
366 | |
367 | if (pci_dev->state_saved) | |
368 | goto Fixup; | |
369 | ||
99dadce8 RW |
370 | if (pci_dev->current_state != PCI_D0 |
371 | && pci_dev->current_state != PCI_UNKNOWN) { | |
372 | WARN_ONCE(pci_dev->current_state != prev, | |
373 | "PCI PM: Device state not saved by %pF\n", | |
374 | drv->suspend); | |
aa8c6c93 | 375 | goto Fixup; |
99dadce8 | 376 | } |
02669492 | 377 | } |
ad8cfa1d | 378 | |
aa8c6c93 RW |
379 | pci_save_state(pci_dev); |
380 | /* | |
381 | * This is for compatibility with existing code with legacy PM support. | |
382 | */ | |
383 | pci_pm_set_unknown_state(pci_dev); | |
384 | ||
385 | Fixup: | |
ad8cfa1d RW |
386 | pci_fixup_device(pci_fixup_suspend, pci_dev); |
387 | ||
57ef8026 | 388 | return error; |
1da177e4 LT |
389 | } |
390 | ||
bbb44d9f | 391 | static int pci_legacy_suspend_late(struct device *dev, pm_message_t state) |
cbd69dbb LT |
392 | { |
393 | struct pci_dev * pci_dev = to_pci_dev(dev); | |
394 | struct pci_driver * drv = pci_dev->driver; | |
57ef8026 | 395 | int error = 0; |
cbd69dbb LT |
396 | |
397 | if (drv && drv->suspend_late) { | |
57ef8026 FP |
398 | error = drv->suspend_late(pci_dev, state); |
399 | suspend_report_result(drv->suspend_late, error); | |
cbd69dbb | 400 | } |
57ef8026 | 401 | return error; |
cbd69dbb | 402 | } |
1da177e4 | 403 | |
f6dc1e5e RW |
404 | static int pci_legacy_resume_early(struct device *dev) |
405 | { | |
f6dc1e5e RW |
406 | struct pci_dev * pci_dev = to_pci_dev(dev); |
407 | struct pci_driver * drv = pci_dev->driver; | |
408 | ||
aa8c6c93 RW |
409 | return drv && drv->resume_early ? |
410 | drv->resume_early(pci_dev) : 0; | |
f6dc1e5e RW |
411 | } |
412 | ||
bbb44d9f | 413 | static int pci_legacy_resume(struct device *dev) |
1da177e4 LT |
414 | { |
415 | struct pci_dev * pci_dev = to_pci_dev(dev); | |
416 | struct pci_driver * drv = pci_dev->driver; | |
417 | ||
ad8cfa1d RW |
418 | pci_fixup_device(pci_fixup_resume, pci_dev); |
419 | ||
aa8c6c93 RW |
420 | return drv && drv->resume ? |
421 | drv->resume(pci_dev) : pci_pm_reenable_device(pci_dev); | |
1da177e4 LT |
422 | } |
423 | ||
571ff758 RW |
424 | /* Auxiliary functions used by the new power management framework */ |
425 | ||
0128a89c RW |
426 | /** |
427 | * pci_restore_standard_config - restore standard config registers of PCI device | |
428 | * @pci_dev: PCI device to handle | |
429 | */ | |
430 | static int pci_restore_standard_config(struct pci_dev *pci_dev) | |
431 | { | |
432 | pci_update_current_state(pci_dev, PCI_UNKNOWN); | |
433 | ||
434 | if (pci_dev->current_state != PCI_D0) { | |
435 | int error = pci_set_power_state(pci_dev, PCI_D0); | |
436 | if (error) | |
437 | return error; | |
438 | } | |
439 | ||
440 | return pci_dev->state_saved ? pci_restore_state(pci_dev) : 0; | |
441 | } | |
442 | ||
73410429 RW |
443 | static void pci_pm_default_resume_noirq(struct pci_dev *pci_dev) |
444 | { | |
aa8c6c93 | 445 | pci_restore_standard_config(pci_dev); |
418e4da3 | 446 | pci_dev->state_saved = false; |
aa8c6c93 | 447 | pci_fixup_device(pci_fixup_resume_early, pci_dev); |
73410429 RW |
448 | } |
449 | ||
5294e256 | 450 | static void pci_pm_default_resume(struct pci_dev *pci_dev) |
571ff758 | 451 | { |
73410429 RW |
452 | pci_fixup_device(pci_fixup_resume, pci_dev); |
453 | ||
5294e256 RW |
454 | if (!pci_is_bridge(pci_dev)) |
455 | pci_enable_wake(pci_dev, PCI_D0, false); | |
571ff758 RW |
456 | } |
457 | ||
5294e256 | 458 | static void pci_pm_default_suspend(struct pci_dev *pci_dev) |
73410429 | 459 | { |
5294e256 | 460 | /* Disable non-bridge devices without PM support */ |
cbbc2f6b RW |
461 | if (!pci_is_bridge(pci_dev)) |
462 | pci_disable_enabled_device(pci_dev); | |
73410429 RW |
463 | pci_save_state(pci_dev); |
464 | } | |
465 | ||
07e836e8 RW |
466 | static bool pci_has_legacy_pm_support(struct pci_dev *pci_dev) |
467 | { | |
468 | struct pci_driver *drv = pci_dev->driver; | |
bb808945 | 469 | bool ret = drv && (drv->suspend || drv->suspend_late || drv->resume |
07e836e8 | 470 | || drv->resume_early); |
bb808945 RW |
471 | |
472 | /* | |
473 | * Legacy PM support is used by default, so warn if the new framework is | |
474 | * supported as well. Drivers are supposed to support either the | |
475 | * former, or the latter, but not both at the same time. | |
476 | */ | |
477 | WARN_ON(ret && drv->driver.pm); | |
478 | ||
479 | return ret; | |
07e836e8 RW |
480 | } |
481 | ||
571ff758 RW |
482 | /* New power management framework */ |
483 | ||
bbb44d9f RW |
484 | static int pci_pm_prepare(struct device *dev) |
485 | { | |
486 | struct device_driver *drv = dev->driver; | |
487 | int error = 0; | |
488 | ||
489 | if (drv && drv->pm && drv->pm->prepare) | |
490 | error = drv->pm->prepare(dev); | |
491 | ||
492 | return error; | |
493 | } | |
494 | ||
495 | static void pci_pm_complete(struct device *dev) | |
496 | { | |
497 | struct device_driver *drv = dev->driver; | |
498 | ||
499 | if (drv && drv->pm && drv->pm->complete) | |
500 | drv->pm->complete(dev); | |
501 | } | |
502 | ||
503 | #ifdef CONFIG_SUSPEND | |
504 | ||
505 | static int pci_pm_suspend(struct device *dev) | |
506 | { | |
507 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
ddb7c9d2 | 508 | struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; |
bbb44d9f | 509 | |
ad8cfa1d RW |
510 | if (pci_has_legacy_pm_support(pci_dev)) |
511 | return pci_legacy_suspend(dev, PMSG_SUSPEND); | |
bb808945 | 512 | |
5294e256 RW |
513 | if (!pm) { |
514 | pci_pm_default_suspend(pci_dev); | |
515 | goto Fixup; | |
516 | } | |
517 | ||
518 | pci_dev->state_saved = false; | |
519 | ||
520 | if (pm->suspend) { | |
521 | pci_power_t prev = pci_dev->current_state; | |
522 | int error; | |
523 | ||
ddb7c9d2 RW |
524 | error = pm->suspend(dev); |
525 | suspend_report_result(pm->suspend, error); | |
5294e256 RW |
526 | if (error) |
527 | return error; | |
528 | ||
529 | if (pci_dev->state_saved) | |
530 | goto Fixup; | |
531 | ||
532 | if (pci_dev->current_state != PCI_D0 | |
533 | && pci_dev->current_state != PCI_UNKNOWN) { | |
534 | WARN_ONCE(pci_dev->current_state != prev, | |
535 | "PCI PM: State of device not saved by %pF\n", | |
536 | pm->suspend); | |
537 | goto Fixup; | |
538 | } | |
bbb44d9f | 539 | } |
fa58d305 | 540 | |
5294e256 RW |
541 | if (!pci_dev->state_saved) { |
542 | pci_save_state(pci_dev); | |
543 | if (!pci_is_bridge(pci_dev)) | |
544 | pci_prepare_to_sleep(pci_dev); | |
545 | } | |
bbb44d9f | 546 | |
5294e256 RW |
547 | Fixup: |
548 | pci_fixup_device(pci_fixup_suspend, pci_dev); | |
549 | ||
550 | return 0; | |
bbb44d9f RW |
551 | } |
552 | ||
553 | static int pci_pm_suspend_noirq(struct device *dev) | |
c8958177 | 554 | { |
355a72d7 | 555 | struct pci_dev *pci_dev = to_pci_dev(dev); |
adf09493 | 556 | struct device_driver *drv = dev->driver; |
bbb44d9f | 557 | int error = 0; |
c8958177 | 558 | |
bb808945 RW |
559 | if (pci_has_legacy_pm_support(pci_dev)) |
560 | return pci_legacy_suspend_late(dev, PMSG_SUSPEND); | |
561 | ||
d67e37d7 RW |
562 | if (drv && drv->pm && drv->pm->suspend_noirq) { |
563 | error = drv->pm->suspend_noirq(dev); | |
564 | suspend_report_result(drv->pm->suspend_noirq, error); | |
bbb44d9f RW |
565 | } |
566 | ||
d67e37d7 RW |
567 | if (!error) |
568 | pci_pm_set_unknown_state(pci_dev); | |
569 | ||
bbb44d9f | 570 | return error; |
c8958177 | 571 | } |
1da177e4 | 572 | |
f6dc1e5e | 573 | static int pci_pm_resume_noirq(struct device *dev) |
bbb44d9f RW |
574 | { |
575 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
576 | struct device_driver *drv = dev->driver; | |
355a72d7 | 577 | int error = 0; |
bbb44d9f | 578 | |
aa8c6c93 RW |
579 | pci_pm_default_resume_noirq(pci_dev); |
580 | ||
ad8cfa1d | 581 | if (pci_has_legacy_pm_support(pci_dev)) |
f6dc1e5e | 582 | return pci_legacy_resume_early(dev); |
bb808945 | 583 | |
f6dc1e5e RW |
584 | if (drv && drv->pm && drv->pm->resume_noirq) |
585 | error = drv->pm->resume_noirq(dev); | |
bbb44d9f RW |
586 | |
587 | return error; | |
588 | } | |
589 | ||
f6dc1e5e | 590 | static int pci_pm_resume(struct device *dev) |
bbb44d9f | 591 | { |
355a72d7 | 592 | struct pci_dev *pci_dev = to_pci_dev(dev); |
5294e256 | 593 | struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; |
bbb44d9f RW |
594 | int error = 0; |
595 | ||
418e4da3 RW |
596 | /* |
597 | * This is necessary for the suspend error path in which resume is | |
598 | * called without restoring the standard config registers of the device. | |
599 | */ | |
600 | if (pci_dev->state_saved) | |
601 | pci_restore_standard_config(pci_dev); | |
602 | ||
ad8cfa1d | 603 | if (pci_has_legacy_pm_support(pci_dev)) |
f6dc1e5e | 604 | return pci_legacy_resume(dev); |
bb808945 | 605 | |
5294e256 | 606 | pci_pm_default_resume(pci_dev); |
73410429 | 607 | |
5294e256 RW |
608 | if (pm) { |
609 | if (pm->resume) | |
610 | error = pm->resume(dev); | |
611 | } else { | |
612 | pci_pm_reenable_device(pci_dev); | |
613 | } | |
bbb44d9f | 614 | |
5294e256 | 615 | return 0; |
bbb44d9f RW |
616 | } |
617 | ||
618 | #else /* !CONFIG_SUSPEND */ | |
619 | ||
620 | #define pci_pm_suspend NULL | |
621 | #define pci_pm_suspend_noirq NULL | |
622 | #define pci_pm_resume NULL | |
623 | #define pci_pm_resume_noirq NULL | |
624 | ||
625 | #endif /* !CONFIG_SUSPEND */ | |
626 | ||
627 | #ifdef CONFIG_HIBERNATION | |
628 | ||
629 | static int pci_pm_freeze(struct device *dev) | |
630 | { | |
631 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
5294e256 | 632 | struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; |
bbb44d9f | 633 | |
ad8cfa1d RW |
634 | if (pci_has_legacy_pm_support(pci_dev)) |
635 | return pci_legacy_suspend(dev, PMSG_FREEZE); | |
bb808945 | 636 | |
5294e256 RW |
637 | if (!pm) { |
638 | pci_pm_default_suspend(pci_dev); | |
639 | return 0; | |
bbb44d9f RW |
640 | } |
641 | ||
5294e256 | 642 | pci_dev->state_saved = false; |
d67e37d7 | 643 | |
5294e256 RW |
644 | if (pm->freeze) { |
645 | int error; | |
646 | ||
647 | error = pm->freeze(dev); | |
648 | suspend_report_result(pm->freeze, error); | |
649 | if (error) | |
650 | return error; | |
651 | } | |
652 | ||
653 | if (!pci_dev->state_saved) | |
654 | pci_save_state(pci_dev); | |
655 | ||
656 | return 0; | |
bbb44d9f RW |
657 | } |
658 | ||
659 | static int pci_pm_freeze_noirq(struct device *dev) | |
660 | { | |
355a72d7 | 661 | struct pci_dev *pci_dev = to_pci_dev(dev); |
adf09493 | 662 | struct device_driver *drv = dev->driver; |
bbb44d9f RW |
663 | int error = 0; |
664 | ||
bb808945 RW |
665 | if (pci_has_legacy_pm_support(pci_dev)) |
666 | return pci_legacy_suspend_late(dev, PMSG_FREEZE); | |
667 | ||
d67e37d7 RW |
668 | if (drv && drv->pm && drv->pm->freeze_noirq) { |
669 | error = drv->pm->freeze_noirq(dev); | |
670 | suspend_report_result(drv->pm->freeze_noirq, error); | |
bbb44d9f RW |
671 | } |
672 | ||
d67e37d7 RW |
673 | if (!error) |
674 | pci_pm_set_unknown_state(pci_dev); | |
675 | ||
bbb44d9f RW |
676 | return error; |
677 | } | |
678 | ||
f6dc1e5e | 679 | static int pci_pm_thaw_noirq(struct device *dev) |
bbb44d9f | 680 | { |
355a72d7 | 681 | struct pci_dev *pci_dev = to_pci_dev(dev); |
bbb44d9f RW |
682 | struct device_driver *drv = dev->driver; |
683 | int error = 0; | |
684 | ||
ad8cfa1d | 685 | if (pci_has_legacy_pm_support(pci_dev)) |
f6dc1e5e | 686 | return pci_legacy_resume_early(dev); |
bb808945 | 687 | |
f6dc1e5e | 688 | pci_update_current_state(pci_dev, PCI_D0); |
d67e37d7 | 689 | |
f6dc1e5e RW |
690 | if (drv && drv->pm && drv->pm->thaw_noirq) |
691 | error = drv->pm->thaw_noirq(dev); | |
bbb44d9f RW |
692 | |
693 | return error; | |
694 | } | |
695 | ||
f6dc1e5e | 696 | static int pci_pm_thaw(struct device *dev) |
bbb44d9f | 697 | { |
355a72d7 | 698 | struct pci_dev *pci_dev = to_pci_dev(dev); |
5294e256 | 699 | struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; |
bbb44d9f RW |
700 | int error = 0; |
701 | ||
ad8cfa1d | 702 | if (pci_has_legacy_pm_support(pci_dev)) |
f6dc1e5e | 703 | return pci_legacy_resume(dev); |
bb808945 | 704 | |
5294e256 RW |
705 | if (pm) { |
706 | if (pm->thaw) | |
707 | error = pm->thaw(dev); | |
708 | } else { | |
709 | pci_pm_reenable_device(pci_dev); | |
710 | } | |
bbb44d9f RW |
711 | |
712 | return error; | |
713 | } | |
714 | ||
715 | static int pci_pm_poweroff(struct device *dev) | |
716 | { | |
355a72d7 | 717 | struct pci_dev *pci_dev = to_pci_dev(dev); |
ddb7c9d2 | 718 | struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; |
bbb44d9f RW |
719 | int error = 0; |
720 | ||
ad8cfa1d RW |
721 | if (pci_has_legacy_pm_support(pci_dev)) |
722 | return pci_legacy_suspend(dev, PMSG_HIBERNATE); | |
bb808945 | 723 | |
5294e256 RW |
724 | if (!pm) { |
725 | pci_pm_default_suspend(pci_dev); | |
726 | goto Fixup; | |
727 | } | |
728 | ||
729 | pci_dev->state_saved = false; | |
730 | ||
731 | if (pm->poweroff) { | |
ddb7c9d2 RW |
732 | error = pm->poweroff(dev); |
733 | suspend_report_result(pm->poweroff, error); | |
bbb44d9f RW |
734 | } |
735 | ||
5294e256 RW |
736 | if (!pci_dev->state_saved && !pci_is_bridge(pci_dev)) |
737 | pci_prepare_to_sleep(pci_dev); | |
738 | ||
739 | Fixup: | |
740 | pci_fixup_device(pci_fixup_suspend, pci_dev); | |
c9b9972b | 741 | |
bbb44d9f RW |
742 | return error; |
743 | } | |
744 | ||
745 | static int pci_pm_poweroff_noirq(struct device *dev) | |
746 | { | |
adf09493 | 747 | struct device_driver *drv = dev->driver; |
bbb44d9f RW |
748 | int error = 0; |
749 | ||
bb808945 RW |
750 | if (pci_has_legacy_pm_support(to_pci_dev(dev))) |
751 | return pci_legacy_suspend_late(dev, PMSG_HIBERNATE); | |
752 | ||
d67e37d7 RW |
753 | if (drv && drv->pm && drv->pm->poweroff_noirq) { |
754 | error = drv->pm->poweroff_noirq(dev); | |
755 | suspend_report_result(drv->pm->poweroff_noirq, error); | |
bbb44d9f RW |
756 | } |
757 | ||
758 | return error; | |
759 | } | |
760 | ||
f6dc1e5e | 761 | static int pci_pm_restore_noirq(struct device *dev) |
bbb44d9f RW |
762 | { |
763 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
764 | struct device_driver *drv = dev->driver; | |
355a72d7 | 765 | int error = 0; |
bbb44d9f | 766 | |
aa8c6c93 RW |
767 | pci_pm_default_resume_noirq(pci_dev); |
768 | ||
ad8cfa1d | 769 | if (pci_has_legacy_pm_support(pci_dev)) |
f6dc1e5e | 770 | return pci_legacy_resume_early(dev); |
bb808945 | 771 | |
f6dc1e5e RW |
772 | if (drv && drv->pm && drv->pm->restore_noirq) |
773 | error = drv->pm->restore_noirq(dev); | |
bbb44d9f RW |
774 | |
775 | return error; | |
776 | } | |
777 | ||
f6dc1e5e | 778 | static int pci_pm_restore(struct device *dev) |
bbb44d9f RW |
779 | { |
780 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
5294e256 | 781 | struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; |
bbb44d9f RW |
782 | int error = 0; |
783 | ||
418e4da3 RW |
784 | /* |
785 | * This is necessary for the hibernation error path in which restore is | |
786 | * called without restoring the standard config registers of the device. | |
787 | */ | |
788 | if (pci_dev->state_saved) | |
789 | pci_restore_standard_config(pci_dev); | |
790 | ||
ad8cfa1d | 791 | if (pci_has_legacy_pm_support(pci_dev)) |
f6dc1e5e | 792 | return pci_legacy_resume(dev); |
bb808945 | 793 | |
5294e256 | 794 | pci_pm_default_resume(pci_dev); |
73410429 | 795 | |
5294e256 RW |
796 | if (pm) { |
797 | if (pm->restore) | |
798 | error = pm->restore(dev); | |
799 | } else { | |
800 | pci_pm_reenable_device(pci_dev); | |
801 | } | |
bbb44d9f RW |
802 | |
803 | return error; | |
c8958177 | 804 | } |
1da177e4 | 805 | |
bbb44d9f RW |
806 | #else /* !CONFIG_HIBERNATION */ |
807 | ||
808 | #define pci_pm_freeze NULL | |
809 | #define pci_pm_freeze_noirq NULL | |
810 | #define pci_pm_thaw NULL | |
811 | #define pci_pm_thaw_noirq NULL | |
812 | #define pci_pm_poweroff NULL | |
813 | #define pci_pm_poweroff_noirq NULL | |
814 | #define pci_pm_restore NULL | |
815 | #define pci_pm_restore_noirq NULL | |
816 | ||
817 | #endif /* !CONFIG_HIBERNATION */ | |
818 | ||
adf09493 RW |
819 | struct dev_pm_ops pci_dev_pm_ops = { |
820 | .prepare = pci_pm_prepare, | |
821 | .complete = pci_pm_complete, | |
822 | .suspend = pci_pm_suspend, | |
823 | .resume = pci_pm_resume, | |
824 | .freeze = pci_pm_freeze, | |
825 | .thaw = pci_pm_thaw, | |
826 | .poweroff = pci_pm_poweroff, | |
827 | .restore = pci_pm_restore, | |
bbb44d9f RW |
828 | .suspend_noirq = pci_pm_suspend_noirq, |
829 | .resume_noirq = pci_pm_resume_noirq, | |
830 | .freeze_noirq = pci_pm_freeze_noirq, | |
831 | .thaw_noirq = pci_pm_thaw_noirq, | |
832 | .poweroff_noirq = pci_pm_poweroff_noirq, | |
833 | .restore_noirq = pci_pm_restore_noirq, | |
834 | }; | |
835 | ||
adf09493 | 836 | #define PCI_PM_OPS_PTR (&pci_dev_pm_ops) |
bbb44d9f RW |
837 | |
838 | #else /* !CONFIG_PM_SLEEP */ | |
839 | ||
840 | #define PCI_PM_OPS_PTR NULL | |
841 | ||
842 | #endif /* !CONFIG_PM_SLEEP */ | |
843 | ||
1da177e4 | 844 | /** |
863b18f4 | 845 | * __pci_register_driver - register a new pci driver |
1da177e4 | 846 | * @drv: the driver structure to register |
863b18f4 | 847 | * @owner: owner module of drv |
f95d882d | 848 | * @mod_name: module name string |
1da177e4 LT |
849 | * |
850 | * Adds the driver structure to the list of registered drivers. | |
851 | * Returns a negative value on error, otherwise 0. | |
eaae4b3a | 852 | * If no error occurred, the driver remains registered even if |
1da177e4 LT |
853 | * no device was claimed during registration. |
854 | */ | |
725522b5 GKH |
855 | int __pci_register_driver(struct pci_driver *drv, struct module *owner, |
856 | const char *mod_name) | |
1da177e4 LT |
857 | { |
858 | int error; | |
859 | ||
860 | /* initialize common driver fields */ | |
861 | drv->driver.name = drv->name; | |
862 | drv->driver.bus = &pci_bus_type; | |
863b18f4 | 863 | drv->driver.owner = owner; |
725522b5 | 864 | drv->driver.mod_name = mod_name; |
50b00755 | 865 | |
75865858 GKH |
866 | spin_lock_init(&drv->dynids.lock); |
867 | INIT_LIST_HEAD(&drv->dynids.list); | |
1da177e4 LT |
868 | |
869 | /* register with core */ | |
870 | error = driver_register(&drv->driver); | |
50bf14b3 AM |
871 | if (error) |
872 | return error; | |
1da177e4 | 873 | |
50bf14b3 AM |
874 | error = pci_create_newid_file(drv); |
875 | if (error) | |
876 | driver_unregister(&drv->driver); | |
1da177e4 LT |
877 | |
878 | return error; | |
879 | } | |
880 | ||
881 | /** | |
882 | * pci_unregister_driver - unregister a pci driver | |
883 | * @drv: the driver structure to unregister | |
884 | * | |
885 | * Deletes the driver structure from the list of registered PCI drivers, | |
886 | * gives it a chance to clean up by calling its remove() function for | |
887 | * each device it was responsible for, and marks those devices as | |
888 | * driverless. | |
889 | */ | |
890 | ||
891 | void | |
892 | pci_unregister_driver(struct pci_driver *drv) | |
893 | { | |
03d43b19 | 894 | pci_remove_newid_file(drv); |
1da177e4 LT |
895 | driver_unregister(&drv->driver); |
896 | pci_free_dynids(drv); | |
897 | } | |
898 | ||
899 | static struct pci_driver pci_compat_driver = { | |
900 | .name = "compat" | |
901 | }; | |
902 | ||
903 | /** | |
904 | * pci_dev_driver - get the pci_driver of a device | |
905 | * @dev: the device to query | |
906 | * | |
907 | * Returns the appropriate pci_driver structure or %NULL if there is no | |
908 | * registered driver for the device. | |
909 | */ | |
910 | struct pci_driver * | |
911 | pci_dev_driver(const struct pci_dev *dev) | |
912 | { | |
913 | if (dev->driver) | |
914 | return dev->driver; | |
915 | else { | |
916 | int i; | |
917 | for(i=0; i<=PCI_ROM_RESOURCE; i++) | |
918 | if (dev->resource[i].flags & IORESOURCE_BUSY) | |
919 | return &pci_compat_driver; | |
920 | } | |
921 | return NULL; | |
922 | } | |
923 | ||
924 | /** | |
925 | * pci_bus_match - Tell if a PCI device structure has a matching PCI device id structure | |
1da177e4 | 926 | * @dev: the PCI device structure to match against |
8f7020d3 | 927 | * @drv: the device driver to search for matching PCI device id structures |
1da177e4 LT |
928 | * |
929 | * Used by a driver to check whether a PCI device present in the | |
8f7020d3 | 930 | * system is in its list of supported devices. Returns the matching |
1da177e4 LT |
931 | * pci_device_id structure or %NULL if there is no match. |
932 | */ | |
75865858 | 933 | static int pci_bus_match(struct device *dev, struct device_driver *drv) |
1da177e4 | 934 | { |
75865858 GKH |
935 | struct pci_dev *pci_dev = to_pci_dev(dev); |
936 | struct pci_driver *pci_drv = to_pci_driver(drv); | |
1da177e4 LT |
937 | const struct pci_device_id *found_id; |
938 | ||
75865858 | 939 | found_id = pci_match_device(pci_drv, pci_dev); |
1da177e4 LT |
940 | if (found_id) |
941 | return 1; | |
942 | ||
75865858 | 943 | return 0; |
1da177e4 LT |
944 | } |
945 | ||
946 | /** | |
947 | * pci_dev_get - increments the reference count of the pci device structure | |
948 | * @dev: the device being referenced | |
949 | * | |
950 | * Each live reference to a device should be refcounted. | |
951 | * | |
952 | * Drivers for PCI devices should normally record such references in | |
953 | * their probe() methods, when they bind to a device, and release | |
954 | * them by calling pci_dev_put(), in their disconnect() methods. | |
955 | * | |
956 | * A pointer to the device with the incremented reference counter is returned. | |
957 | */ | |
958 | struct pci_dev *pci_dev_get(struct pci_dev *dev) | |
959 | { | |
960 | if (dev) | |
961 | get_device(&dev->dev); | |
962 | return dev; | |
963 | } | |
964 | ||
965 | /** | |
966 | * pci_dev_put - release a use of the pci device structure | |
967 | * @dev: device that's been disconnected | |
968 | * | |
969 | * Must be called when a user of a device is finished with it. When the last | |
970 | * user of the device calls this function, the memory of the device is freed. | |
971 | */ | |
972 | void pci_dev_put(struct pci_dev *dev) | |
973 | { | |
974 | if (dev) | |
975 | put_device(&dev->dev); | |
976 | } | |
977 | ||
978 | #ifndef CONFIG_HOTPLUG | |
7eff2e7a | 979 | int pci_uevent(struct device *dev, struct kobj_uevent_env *env) |
1da177e4 LT |
980 | { |
981 | return -ENODEV; | |
982 | } | |
983 | #endif | |
984 | ||
985 | struct bus_type pci_bus_type = { | |
986 | .name = "pci", | |
987 | .match = pci_bus_match, | |
312c004d | 988 | .uevent = pci_uevent, |
b15d686a RK |
989 | .probe = pci_device_probe, |
990 | .remove = pci_device_remove, | |
cbd69dbb | 991 | .shutdown = pci_device_shutdown, |
1da177e4 | 992 | .dev_attrs = pci_dev_attrs, |
bbb44d9f | 993 | .pm = PCI_PM_OPS_PTR, |
1da177e4 LT |
994 | }; |
995 | ||
996 | static int __init pci_driver_init(void) | |
997 | { | |
998 | return bus_register(&pci_bus_type); | |
999 | } | |
1000 | ||
1001 | postcore_initcall(pci_driver_init); | |
1002 | ||
75865858 | 1003 | EXPORT_SYMBOL(pci_match_id); |
863b18f4 | 1004 | EXPORT_SYMBOL(__pci_register_driver); |
1da177e4 LT |
1005 | EXPORT_SYMBOL(pci_unregister_driver); |
1006 | EXPORT_SYMBOL(pci_dev_driver); | |
1007 | EXPORT_SYMBOL(pci_bus_type); | |
1008 | EXPORT_SYMBOL(pci_dev_get); | |
1009 | EXPORT_SYMBOL(pci_dev_put); |