Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * drivers/pci/pci-driver.c | |
3 | * | |
2b937303 GKH |
4 | * (C) Copyright 2002-2004, 2007 Greg Kroah-Hartman <greg@kroah.com> |
5 | * (C) Copyright 2007 Novell Inc. | |
6 | * | |
7 | * Released under the GPL v2 only. | |
8 | * | |
1da177e4 LT |
9 | */ |
10 | ||
11 | #include <linux/pci.h> | |
12 | #include <linux/module.h> | |
13 | #include <linux/init.h> | |
14 | #include <linux/device.h> | |
d42c6997 | 15 | #include <linux/mempolicy.h> |
4e57b681 TS |
16 | #include <linux/string.h> |
17 | #include <linux/slab.h> | |
8c65b4a6 | 18 | #include <linux/sched.h> |
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 GK |
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; | |
46939f8b RW |
355 | |
356 | pci_dev->state_saved = false; | |
1da177e4 | 357 | |
02669492 | 358 | if (drv && drv->suspend) { |
99dadce8 | 359 | pci_power_t prev = pci_dev->current_state; |
46939f8b | 360 | int error; |
aa8c6c93 | 361 | |
57ef8026 FP |
362 | error = drv->suspend(pci_dev, state); |
363 | suspend_report_result(drv->suspend, error); | |
364 | if (error) | |
365 | return error; | |
aa8c6c93 | 366 | |
46939f8b | 367 | if (!pci_dev->state_saved && pci_dev->current_state != PCI_D0 |
99dadce8 RW |
368 | && pci_dev->current_state != PCI_UNKNOWN) { |
369 | WARN_ONCE(pci_dev->current_state != prev, | |
370 | "PCI PM: Device state not saved by %pF\n", | |
371 | drv->suspend); | |
99dadce8 | 372 | } |
02669492 | 373 | } |
ad8cfa1d RW |
374 | |
375 | pci_fixup_device(pci_fixup_suspend, pci_dev); | |
376 | ||
46939f8b | 377 | return 0; |
1da177e4 LT |
378 | } |
379 | ||
bbb44d9f | 380 | static int pci_legacy_suspend_late(struct device *dev, pm_message_t state) |
cbd69dbb LT |
381 | { |
382 | struct pci_dev * pci_dev = to_pci_dev(dev); | |
383 | struct pci_driver * drv = pci_dev->driver; | |
cbd69dbb LT |
384 | |
385 | if (drv && drv->suspend_late) { | |
46939f8b RW |
386 | pci_power_t prev = pci_dev->current_state; |
387 | int error; | |
388 | ||
57ef8026 FP |
389 | error = drv->suspend_late(pci_dev, state); |
390 | suspend_report_result(drv->suspend_late, error); | |
46939f8b RW |
391 | if (error) |
392 | return error; | |
393 | ||
394 | if (!pci_dev->state_saved && pci_dev->current_state != PCI_D0 | |
395 | && pci_dev->current_state != PCI_UNKNOWN) { | |
396 | WARN_ONCE(pci_dev->current_state != prev, | |
397 | "PCI PM: Device state not saved by %pF\n", | |
398 | drv->suspend_late); | |
399 | return 0; | |
400 | } | |
cbd69dbb | 401 | } |
46939f8b RW |
402 | |
403 | if (!pci_dev->state_saved) | |
404 | pci_save_state(pci_dev); | |
405 | ||
406 | pci_pm_set_unknown_state(pci_dev); | |
407 | ||
408 | return 0; | |
cbd69dbb | 409 | } |
1da177e4 | 410 | |
f6dc1e5e RW |
411 | static int pci_legacy_resume_early(struct device *dev) |
412 | { | |
f6dc1e5e RW |
413 | struct pci_dev * pci_dev = to_pci_dev(dev); |
414 | struct pci_driver * drv = pci_dev->driver; | |
415 | ||
aa8c6c93 RW |
416 | return drv && drv->resume_early ? |
417 | drv->resume_early(pci_dev) : 0; | |
f6dc1e5e RW |
418 | } |
419 | ||
bbb44d9f | 420 | static int pci_legacy_resume(struct device *dev) |
1da177e4 LT |
421 | { |
422 | struct pci_dev * pci_dev = to_pci_dev(dev); | |
423 | struct pci_driver * drv = pci_dev->driver; | |
424 | ||
ad8cfa1d RW |
425 | pci_fixup_device(pci_fixup_resume, pci_dev); |
426 | ||
aa8c6c93 RW |
427 | return drv && drv->resume ? |
428 | drv->resume(pci_dev) : pci_pm_reenable_device(pci_dev); | |
1da177e4 LT |
429 | } |
430 | ||
571ff758 RW |
431 | /* Auxiliary functions used by the new power management framework */ |
432 | ||
0128a89c RW |
433 | /** |
434 | * pci_restore_standard_config - restore standard config registers of PCI device | |
435 | * @pci_dev: PCI device to handle | |
436 | */ | |
437 | static int pci_restore_standard_config(struct pci_dev *pci_dev) | |
438 | { | |
439 | pci_update_current_state(pci_dev, PCI_UNKNOWN); | |
440 | ||
441 | if (pci_dev->current_state != PCI_D0) { | |
442 | int error = pci_set_power_state(pci_dev, PCI_D0); | |
443 | if (error) | |
444 | return error; | |
445 | } | |
446 | ||
447 | return pci_dev->state_saved ? pci_restore_state(pci_dev) : 0; | |
448 | } | |
449 | ||
73410429 RW |
450 | static void pci_pm_default_resume_noirq(struct pci_dev *pci_dev) |
451 | { | |
aa8c6c93 | 452 | pci_restore_standard_config(pci_dev); |
418e4da3 | 453 | pci_dev->state_saved = false; |
aa8c6c93 | 454 | pci_fixup_device(pci_fixup_resume_early, pci_dev); |
73410429 RW |
455 | } |
456 | ||
5294e256 | 457 | static void pci_pm_default_resume(struct pci_dev *pci_dev) |
571ff758 | 458 | { |
73410429 RW |
459 | pci_fixup_device(pci_fixup_resume, pci_dev); |
460 | ||
5294e256 RW |
461 | if (!pci_is_bridge(pci_dev)) |
462 | pci_enable_wake(pci_dev, PCI_D0, false); | |
571ff758 RW |
463 | } |
464 | ||
5294e256 | 465 | static void pci_pm_default_suspend(struct pci_dev *pci_dev) |
73410429 | 466 | { |
5294e256 | 467 | /* Disable non-bridge devices without PM support */ |
cbbc2f6b RW |
468 | if (!pci_is_bridge(pci_dev)) |
469 | pci_disable_enabled_device(pci_dev); | |
73410429 RW |
470 | } |
471 | ||
07e836e8 RW |
472 | static bool pci_has_legacy_pm_support(struct pci_dev *pci_dev) |
473 | { | |
474 | struct pci_driver *drv = pci_dev->driver; | |
bb808945 | 475 | bool ret = drv && (drv->suspend || drv->suspend_late || drv->resume |
07e836e8 | 476 | || drv->resume_early); |
bb808945 RW |
477 | |
478 | /* | |
479 | * Legacy PM support is used by default, so warn if the new framework is | |
480 | * supported as well. Drivers are supposed to support either the | |
481 | * former, or the latter, but not both at the same time. | |
482 | */ | |
483 | WARN_ON(ret && drv->driver.pm); | |
484 | ||
485 | return ret; | |
07e836e8 RW |
486 | } |
487 | ||
571ff758 RW |
488 | /* New power management framework */ |
489 | ||
bbb44d9f RW |
490 | static int pci_pm_prepare(struct device *dev) |
491 | { | |
492 | struct device_driver *drv = dev->driver; | |
493 | int error = 0; | |
494 | ||
495 | if (drv && drv->pm && drv->pm->prepare) | |
496 | error = drv->pm->prepare(dev); | |
497 | ||
498 | return error; | |
499 | } | |
500 | ||
501 | static void pci_pm_complete(struct device *dev) | |
502 | { | |
503 | struct device_driver *drv = dev->driver; | |
504 | ||
505 | if (drv && drv->pm && drv->pm->complete) | |
506 | drv->pm->complete(dev); | |
507 | } | |
508 | ||
509 | #ifdef CONFIG_SUSPEND | |
510 | ||
511 | static int pci_pm_suspend(struct device *dev) | |
512 | { | |
513 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
ddb7c9d2 | 514 | struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; |
bbb44d9f | 515 | |
ad8cfa1d RW |
516 | if (pci_has_legacy_pm_support(pci_dev)) |
517 | return pci_legacy_suspend(dev, PMSG_SUSPEND); | |
bb808945 | 518 | |
5294e256 RW |
519 | if (!pm) { |
520 | pci_pm_default_suspend(pci_dev); | |
521 | goto Fixup; | |
522 | } | |
523 | ||
524 | pci_dev->state_saved = false; | |
525 | ||
526 | if (pm->suspend) { | |
527 | pci_power_t prev = pci_dev->current_state; | |
528 | int error; | |
529 | ||
ddb7c9d2 RW |
530 | error = pm->suspend(dev); |
531 | suspend_report_result(pm->suspend, error); | |
5294e256 RW |
532 | if (error) |
533 | return error; | |
534 | ||
46939f8b | 535 | if (!pci_dev->state_saved && pci_dev->current_state != PCI_D0 |
5294e256 RW |
536 | && pci_dev->current_state != PCI_UNKNOWN) { |
537 | WARN_ONCE(pci_dev->current_state != prev, | |
538 | "PCI PM: State of device not saved by %pF\n", | |
539 | pm->suspend); | |
5294e256 | 540 | } |
bbb44d9f | 541 | } |
fa58d305 | 542 | |
5294e256 RW |
543 | Fixup: |
544 | pci_fixup_device(pci_fixup_suspend, pci_dev); | |
545 | ||
546 | return 0; | |
bbb44d9f RW |
547 | } |
548 | ||
549 | static int pci_pm_suspend_noirq(struct device *dev) | |
c8958177 | 550 | { |
355a72d7 | 551 | struct pci_dev *pci_dev = to_pci_dev(dev); |
46939f8b | 552 | struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; |
c8958177 | 553 | |
bb808945 RW |
554 | if (pci_has_legacy_pm_support(pci_dev)) |
555 | return pci_legacy_suspend_late(dev, PMSG_SUSPEND); | |
556 | ||
46939f8b RW |
557 | if (!pm) |
558 | return 0; | |
559 | ||
560 | if (pm->suspend_noirq) { | |
561 | pci_power_t prev = pci_dev->current_state; | |
562 | int error; | |
563 | ||
564 | error = pm->suspend_noirq(dev); | |
565 | suspend_report_result(pm->suspend_noirq, error); | |
566 | if (error) | |
567 | return error; | |
568 | ||
569 | if (!pci_dev->state_saved && pci_dev->current_state != PCI_D0 | |
570 | && pci_dev->current_state != PCI_UNKNOWN) { | |
571 | WARN_ONCE(pci_dev->current_state != prev, | |
572 | "PCI PM: State of device not saved by %pF\n", | |
573 | pm->suspend_noirq); | |
574 | return 0; | |
575 | } | |
bbb44d9f RW |
576 | } |
577 | ||
46939f8b RW |
578 | if (!pci_dev->state_saved) { |
579 | pci_save_state(pci_dev); | |
580 | if (!pci_is_bridge(pci_dev)) | |
581 | pci_prepare_to_sleep(pci_dev); | |
582 | } | |
d67e37d7 | 583 | |
46939f8b RW |
584 | pci_pm_set_unknown_state(pci_dev); |
585 | ||
586 | return 0; | |
c8958177 | 587 | } |
1da177e4 | 588 | |
f6dc1e5e | 589 | static int pci_pm_resume_noirq(struct device *dev) |
bbb44d9f RW |
590 | { |
591 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
592 | struct device_driver *drv = dev->driver; | |
355a72d7 | 593 | int error = 0; |
bbb44d9f | 594 | |
aa8c6c93 RW |
595 | pci_pm_default_resume_noirq(pci_dev); |
596 | ||
ad8cfa1d | 597 | if (pci_has_legacy_pm_support(pci_dev)) |
f6dc1e5e | 598 | return pci_legacy_resume_early(dev); |
bb808945 | 599 | |
f6dc1e5e RW |
600 | if (drv && drv->pm && drv->pm->resume_noirq) |
601 | error = drv->pm->resume_noirq(dev); | |
bbb44d9f RW |
602 | |
603 | return error; | |
604 | } | |
605 | ||
f6dc1e5e | 606 | static int pci_pm_resume(struct device *dev) |
bbb44d9f | 607 | { |
355a72d7 | 608 | struct pci_dev *pci_dev = to_pci_dev(dev); |
5294e256 | 609 | struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; |
bbb44d9f RW |
610 | int error = 0; |
611 | ||
418e4da3 RW |
612 | /* |
613 | * This is necessary for the suspend error path in which resume is | |
614 | * called without restoring the standard config registers of the device. | |
615 | */ | |
616 | if (pci_dev->state_saved) | |
617 | pci_restore_standard_config(pci_dev); | |
618 | ||
ad8cfa1d | 619 | if (pci_has_legacy_pm_support(pci_dev)) |
f6dc1e5e | 620 | return pci_legacy_resume(dev); |
bb808945 | 621 | |
5294e256 | 622 | pci_pm_default_resume(pci_dev); |
73410429 | 623 | |
5294e256 RW |
624 | if (pm) { |
625 | if (pm->resume) | |
626 | error = pm->resume(dev); | |
627 | } else { | |
628 | pci_pm_reenable_device(pci_dev); | |
629 | } | |
bbb44d9f | 630 | |
5294e256 | 631 | return 0; |
bbb44d9f RW |
632 | } |
633 | ||
634 | #else /* !CONFIG_SUSPEND */ | |
635 | ||
636 | #define pci_pm_suspend NULL | |
637 | #define pci_pm_suspend_noirq NULL | |
638 | #define pci_pm_resume NULL | |
639 | #define pci_pm_resume_noirq NULL | |
640 | ||
641 | #endif /* !CONFIG_SUSPEND */ | |
642 | ||
643 | #ifdef CONFIG_HIBERNATION | |
644 | ||
645 | static int pci_pm_freeze(struct device *dev) | |
646 | { | |
647 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
5294e256 | 648 | struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; |
bbb44d9f | 649 | |
ad8cfa1d RW |
650 | if (pci_has_legacy_pm_support(pci_dev)) |
651 | return pci_legacy_suspend(dev, PMSG_FREEZE); | |
bb808945 | 652 | |
5294e256 RW |
653 | if (!pm) { |
654 | pci_pm_default_suspend(pci_dev); | |
655 | return 0; | |
bbb44d9f RW |
656 | } |
657 | ||
5294e256 | 658 | pci_dev->state_saved = false; |
d67e37d7 | 659 | |
5294e256 RW |
660 | if (pm->freeze) { |
661 | int error; | |
662 | ||
663 | error = pm->freeze(dev); | |
664 | suspend_report_result(pm->freeze, error); | |
665 | if (error) | |
666 | return error; | |
667 | } | |
668 | ||
5294e256 | 669 | return 0; |
bbb44d9f RW |
670 | } |
671 | ||
672 | static int pci_pm_freeze_noirq(struct device *dev) | |
673 | { | |
355a72d7 | 674 | struct pci_dev *pci_dev = to_pci_dev(dev); |
adf09493 | 675 | struct device_driver *drv = dev->driver; |
bbb44d9f | 676 | |
bb808945 RW |
677 | if (pci_has_legacy_pm_support(pci_dev)) |
678 | return pci_legacy_suspend_late(dev, PMSG_FREEZE); | |
679 | ||
d67e37d7 | 680 | if (drv && drv->pm && drv->pm->freeze_noirq) { |
46939f8b RW |
681 | int error; |
682 | ||
d67e37d7 RW |
683 | error = drv->pm->freeze_noirq(dev); |
684 | suspend_report_result(drv->pm->freeze_noirq, error); | |
46939f8b RW |
685 | if (error) |
686 | return error; | |
bbb44d9f RW |
687 | } |
688 | ||
46939f8b RW |
689 | if (!pci_dev->state_saved) |
690 | pci_save_state(pci_dev); | |
d67e37d7 | 691 | |
46939f8b RW |
692 | pci_pm_set_unknown_state(pci_dev); |
693 | ||
694 | return 0; | |
bbb44d9f RW |
695 | } |
696 | ||
f6dc1e5e | 697 | static int pci_pm_thaw_noirq(struct device *dev) |
bbb44d9f | 698 | { |
355a72d7 | 699 | struct pci_dev *pci_dev = to_pci_dev(dev); |
bbb44d9f RW |
700 | struct device_driver *drv = dev->driver; |
701 | int error = 0; | |
702 | ||
ad8cfa1d | 703 | if (pci_has_legacy_pm_support(pci_dev)) |
f6dc1e5e | 704 | return pci_legacy_resume_early(dev); |
bb808945 | 705 | |
f6dc1e5e | 706 | pci_update_current_state(pci_dev, PCI_D0); |
d67e37d7 | 707 | |
f6dc1e5e RW |
708 | if (drv && drv->pm && drv->pm->thaw_noirq) |
709 | error = drv->pm->thaw_noirq(dev); | |
bbb44d9f RW |
710 | |
711 | return error; | |
712 | } | |
713 | ||
f6dc1e5e | 714 | static int pci_pm_thaw(struct device *dev) |
bbb44d9f | 715 | { |
355a72d7 | 716 | struct pci_dev *pci_dev = to_pci_dev(dev); |
5294e256 | 717 | struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; |
bbb44d9f RW |
718 | int error = 0; |
719 | ||
ad8cfa1d | 720 | if (pci_has_legacy_pm_support(pci_dev)) |
f6dc1e5e | 721 | return pci_legacy_resume(dev); |
bb808945 | 722 | |
5294e256 RW |
723 | if (pm) { |
724 | if (pm->thaw) | |
725 | error = pm->thaw(dev); | |
726 | } else { | |
727 | pci_pm_reenable_device(pci_dev); | |
728 | } | |
bbb44d9f RW |
729 | |
730 | return error; | |
731 | } | |
732 | ||
733 | static int pci_pm_poweroff(struct device *dev) | |
734 | { | |
355a72d7 | 735 | struct pci_dev *pci_dev = to_pci_dev(dev); |
ddb7c9d2 | 736 | struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; |
bbb44d9f | 737 | |
ad8cfa1d RW |
738 | if (pci_has_legacy_pm_support(pci_dev)) |
739 | return pci_legacy_suspend(dev, PMSG_HIBERNATE); | |
bb808945 | 740 | |
5294e256 RW |
741 | if (!pm) { |
742 | pci_pm_default_suspend(pci_dev); | |
743 | goto Fixup; | |
744 | } | |
745 | ||
746 | pci_dev->state_saved = false; | |
747 | ||
748 | if (pm->poweroff) { | |
46939f8b RW |
749 | int error; |
750 | ||
ddb7c9d2 RW |
751 | error = pm->poweroff(dev); |
752 | suspend_report_result(pm->poweroff, error); | |
46939f8b RW |
753 | if (error) |
754 | return error; | |
bbb44d9f RW |
755 | } |
756 | ||
5294e256 RW |
757 | Fixup: |
758 | pci_fixup_device(pci_fixup_suspend, pci_dev); | |
c9b9972b | 759 | |
46939f8b | 760 | return 0; |
bbb44d9f RW |
761 | } |
762 | ||
763 | static int pci_pm_poweroff_noirq(struct device *dev) | |
764 | { | |
46939f8b | 765 | struct pci_dev *pci_dev = to_pci_dev(dev); |
adf09493 | 766 | struct device_driver *drv = dev->driver; |
bbb44d9f | 767 | |
bb808945 RW |
768 | if (pci_has_legacy_pm_support(to_pci_dev(dev))) |
769 | return pci_legacy_suspend_late(dev, PMSG_HIBERNATE); | |
770 | ||
46939f8b RW |
771 | if (!drv || !drv->pm) |
772 | return 0; | |
773 | ||
774 | if (drv->pm->poweroff_noirq) { | |
775 | int error; | |
776 | ||
d67e37d7 RW |
777 | error = drv->pm->poweroff_noirq(dev); |
778 | suspend_report_result(drv->pm->poweroff_noirq, error); | |
46939f8b RW |
779 | if (error) |
780 | return error; | |
bbb44d9f RW |
781 | } |
782 | ||
46939f8b RW |
783 | if (!pci_dev->state_saved && !pci_is_bridge(pci_dev)) |
784 | pci_prepare_to_sleep(pci_dev); | |
785 | ||
786 | return 0; | |
bbb44d9f RW |
787 | } |
788 | ||
f6dc1e5e | 789 | static int pci_pm_restore_noirq(struct device *dev) |
bbb44d9f RW |
790 | { |
791 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
792 | struct device_driver *drv = dev->driver; | |
355a72d7 | 793 | int error = 0; |
bbb44d9f | 794 | |
aa8c6c93 RW |
795 | pci_pm_default_resume_noirq(pci_dev); |
796 | ||
ad8cfa1d | 797 | if (pci_has_legacy_pm_support(pci_dev)) |
f6dc1e5e | 798 | return pci_legacy_resume_early(dev); |
bb808945 | 799 | |
f6dc1e5e RW |
800 | if (drv && drv->pm && drv->pm->restore_noirq) |
801 | error = drv->pm->restore_noirq(dev); | |
bbb44d9f RW |
802 | |
803 | return error; | |
804 | } | |
805 | ||
f6dc1e5e | 806 | static int pci_pm_restore(struct device *dev) |
bbb44d9f RW |
807 | { |
808 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
5294e256 | 809 | struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; |
bbb44d9f RW |
810 | int error = 0; |
811 | ||
418e4da3 RW |
812 | /* |
813 | * This is necessary for the hibernation error path in which restore is | |
814 | * called without restoring the standard config registers of the device. | |
815 | */ | |
816 | if (pci_dev->state_saved) | |
817 | pci_restore_standard_config(pci_dev); | |
818 | ||
ad8cfa1d | 819 | if (pci_has_legacy_pm_support(pci_dev)) |
f6dc1e5e | 820 | return pci_legacy_resume(dev); |
bb808945 | 821 | |
5294e256 | 822 | pci_pm_default_resume(pci_dev); |
73410429 | 823 | |
5294e256 RW |
824 | if (pm) { |
825 | if (pm->restore) | |
826 | error = pm->restore(dev); | |
827 | } else { | |
828 | pci_pm_reenable_device(pci_dev); | |
829 | } | |
bbb44d9f RW |
830 | |
831 | return error; | |
c8958177 | 832 | } |
1da177e4 | 833 | |
bbb44d9f RW |
834 | #else /* !CONFIG_HIBERNATION */ |
835 | ||
836 | #define pci_pm_freeze NULL | |
837 | #define pci_pm_freeze_noirq NULL | |
838 | #define pci_pm_thaw NULL | |
839 | #define pci_pm_thaw_noirq NULL | |
840 | #define pci_pm_poweroff NULL | |
841 | #define pci_pm_poweroff_noirq NULL | |
842 | #define pci_pm_restore NULL | |
843 | #define pci_pm_restore_noirq NULL | |
844 | ||
845 | #endif /* !CONFIG_HIBERNATION */ | |
846 | ||
adf09493 RW |
847 | struct dev_pm_ops pci_dev_pm_ops = { |
848 | .prepare = pci_pm_prepare, | |
849 | .complete = pci_pm_complete, | |
850 | .suspend = pci_pm_suspend, | |
851 | .resume = pci_pm_resume, | |
852 | .freeze = pci_pm_freeze, | |
853 | .thaw = pci_pm_thaw, | |
854 | .poweroff = pci_pm_poweroff, | |
855 | .restore = pci_pm_restore, | |
bbb44d9f RW |
856 | .suspend_noirq = pci_pm_suspend_noirq, |
857 | .resume_noirq = pci_pm_resume_noirq, | |
858 | .freeze_noirq = pci_pm_freeze_noirq, | |
859 | .thaw_noirq = pci_pm_thaw_noirq, | |
860 | .poweroff_noirq = pci_pm_poweroff_noirq, | |
861 | .restore_noirq = pci_pm_restore_noirq, | |
862 | }; | |
863 | ||
adf09493 | 864 | #define PCI_PM_OPS_PTR (&pci_dev_pm_ops) |
bbb44d9f RW |
865 | |
866 | #else /* !CONFIG_PM_SLEEP */ | |
867 | ||
868 | #define PCI_PM_OPS_PTR NULL | |
869 | ||
870 | #endif /* !CONFIG_PM_SLEEP */ | |
871 | ||
1da177e4 | 872 | /** |
863b18f4 | 873 | * __pci_register_driver - register a new pci driver |
1da177e4 | 874 | * @drv: the driver structure to register |
863b18f4 | 875 | * @owner: owner module of drv |
f95d882d | 876 | * @mod_name: module name string |
1da177e4 LT |
877 | * |
878 | * Adds the driver structure to the list of registered drivers. | |
879 | * Returns a negative value on error, otherwise 0. | |
eaae4b3a | 880 | * If no error occurred, the driver remains registered even if |
1da177e4 LT |
881 | * no device was claimed during registration. |
882 | */ | |
725522b5 GKH |
883 | int __pci_register_driver(struct pci_driver *drv, struct module *owner, |
884 | const char *mod_name) | |
1da177e4 LT |
885 | { |
886 | int error; | |
887 | ||
888 | /* initialize common driver fields */ | |
889 | drv->driver.name = drv->name; | |
890 | drv->driver.bus = &pci_bus_type; | |
863b18f4 | 891 | drv->driver.owner = owner; |
725522b5 | 892 | drv->driver.mod_name = mod_name; |
50b00755 | 893 | |
75865858 GKH |
894 | spin_lock_init(&drv->dynids.lock); |
895 | INIT_LIST_HEAD(&drv->dynids.list); | |
1da177e4 LT |
896 | |
897 | /* register with core */ | |
898 | error = driver_register(&drv->driver); | |
50bf14b3 AM |
899 | if (error) |
900 | return error; | |
1da177e4 | 901 | |
50bf14b3 AM |
902 | error = pci_create_newid_file(drv); |
903 | if (error) | |
904 | driver_unregister(&drv->driver); | |
1da177e4 LT |
905 | |
906 | return error; | |
907 | } | |
908 | ||
909 | /** | |
910 | * pci_unregister_driver - unregister a pci driver | |
911 | * @drv: the driver structure to unregister | |
912 | * | |
913 | * Deletes the driver structure from the list of registered PCI drivers, | |
914 | * gives it a chance to clean up by calling its remove() function for | |
915 | * each device it was responsible for, and marks those devices as | |
916 | * driverless. | |
917 | */ | |
918 | ||
919 | void | |
920 | pci_unregister_driver(struct pci_driver *drv) | |
921 | { | |
03d43b19 | 922 | pci_remove_newid_file(drv); |
1da177e4 LT |
923 | driver_unregister(&drv->driver); |
924 | pci_free_dynids(drv); | |
925 | } | |
926 | ||
927 | static struct pci_driver pci_compat_driver = { | |
928 | .name = "compat" | |
929 | }; | |
930 | ||
931 | /** | |
932 | * pci_dev_driver - get the pci_driver of a device | |
933 | * @dev: the device to query | |
934 | * | |
935 | * Returns the appropriate pci_driver structure or %NULL if there is no | |
936 | * registered driver for the device. | |
937 | */ | |
938 | struct pci_driver * | |
939 | pci_dev_driver(const struct pci_dev *dev) | |
940 | { | |
941 | if (dev->driver) | |
942 | return dev->driver; | |
943 | else { | |
944 | int i; | |
945 | for(i=0; i<=PCI_ROM_RESOURCE; i++) | |
946 | if (dev->resource[i].flags & IORESOURCE_BUSY) | |
947 | return &pci_compat_driver; | |
948 | } | |
949 | return NULL; | |
950 | } | |
951 | ||
952 | /** | |
953 | * pci_bus_match - Tell if a PCI device structure has a matching PCI device id structure | |
1da177e4 | 954 | * @dev: the PCI device structure to match against |
8f7020d3 | 955 | * @drv: the device driver to search for matching PCI device id structures |
1da177e4 LT |
956 | * |
957 | * Used by a driver to check whether a PCI device present in the | |
8f7020d3 | 958 | * system is in its list of supported devices. Returns the matching |
1da177e4 LT |
959 | * pci_device_id structure or %NULL if there is no match. |
960 | */ | |
75865858 | 961 | static int pci_bus_match(struct device *dev, struct device_driver *drv) |
1da177e4 | 962 | { |
75865858 GKH |
963 | struct pci_dev *pci_dev = to_pci_dev(dev); |
964 | struct pci_driver *pci_drv = to_pci_driver(drv); | |
1da177e4 LT |
965 | const struct pci_device_id *found_id; |
966 | ||
75865858 | 967 | found_id = pci_match_device(pci_drv, pci_dev); |
1da177e4 LT |
968 | if (found_id) |
969 | return 1; | |
970 | ||
75865858 | 971 | return 0; |
1da177e4 LT |
972 | } |
973 | ||
974 | /** | |
975 | * pci_dev_get - increments the reference count of the pci device structure | |
976 | * @dev: the device being referenced | |
977 | * | |
978 | * Each live reference to a device should be refcounted. | |
979 | * | |
980 | * Drivers for PCI devices should normally record such references in | |
981 | * their probe() methods, when they bind to a device, and release | |
982 | * them by calling pci_dev_put(), in their disconnect() methods. | |
983 | * | |
984 | * A pointer to the device with the incremented reference counter is returned. | |
985 | */ | |
986 | struct pci_dev *pci_dev_get(struct pci_dev *dev) | |
987 | { | |
988 | if (dev) | |
989 | get_device(&dev->dev); | |
990 | return dev; | |
991 | } | |
992 | ||
993 | /** | |
994 | * pci_dev_put - release a use of the pci device structure | |
995 | * @dev: device that's been disconnected | |
996 | * | |
997 | * Must be called when a user of a device is finished with it. When the last | |
998 | * user of the device calls this function, the memory of the device is freed. | |
999 | */ | |
1000 | void pci_dev_put(struct pci_dev *dev) | |
1001 | { | |
1002 | if (dev) | |
1003 | put_device(&dev->dev); | |
1004 | } | |
1005 | ||
1006 | #ifndef CONFIG_HOTPLUG | |
7eff2e7a | 1007 | int pci_uevent(struct device *dev, struct kobj_uevent_env *env) |
1da177e4 LT |
1008 | { |
1009 | return -ENODEV; | |
1010 | } | |
1011 | #endif | |
1012 | ||
1013 | struct bus_type pci_bus_type = { | |
1014 | .name = "pci", | |
1015 | .match = pci_bus_match, | |
312c004d | 1016 | .uevent = pci_uevent, |
b15d686a RK |
1017 | .probe = pci_device_probe, |
1018 | .remove = pci_device_remove, | |
cbd69dbb | 1019 | .shutdown = pci_device_shutdown, |
1da177e4 | 1020 | .dev_attrs = pci_dev_attrs, |
bbb44d9f | 1021 | .pm = PCI_PM_OPS_PTR, |
1da177e4 LT |
1022 | }; |
1023 | ||
1024 | static int __init pci_driver_init(void) | |
1025 | { | |
1026 | return bus_register(&pci_bus_type); | |
1027 | } | |
1028 | ||
1029 | postcore_initcall(pci_driver_init); | |
1030 | ||
75865858 | 1031 | EXPORT_SYMBOL(pci_match_id); |
863b18f4 | 1032 | EXPORT_SYMBOL(__pci_register_driver); |
1da177e4 LT |
1033 | EXPORT_SYMBOL(pci_unregister_driver); |
1034 | EXPORT_SYMBOL(pci_dev_driver); | |
1035 | EXPORT_SYMBOL(pci_bus_type); | |
1036 | EXPORT_SYMBOL(pci_dev_get); | |
1037 | EXPORT_SYMBOL(pci_dev_put); |