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; | |
355 | int i = 0; | |
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 | ||
1da177e4 | 362 | i = drv->suspend(pci_dev, state); |
02669492 | 363 | suspend_report_result(drv->suspend, i); |
aa8c6c93 RW |
364 | if (i) |
365 | return i; | |
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 | ||
1da177e4 LT |
388 | return i; |
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; | |
395 | int i = 0; | |
396 | ||
397 | if (drv && drv->suspend_late) { | |
398 | i = drv->suspend_late(pci_dev, state); | |
399 | suspend_report_result(drv->suspend_late, i); | |
400 | } | |
401 | return i; | |
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 | ||
73410429 RW |
426 | static void pci_pm_default_resume_noirq(struct pci_dev *pci_dev) |
427 | { | |
aa8c6c93 | 428 | pci_restore_standard_config(pci_dev); |
418e4da3 | 429 | pci_dev->state_saved = false; |
aa8c6c93 | 430 | pci_fixup_device(pci_fixup_resume_early, pci_dev); |
73410429 RW |
431 | } |
432 | ||
571ff758 RW |
433 | static int pci_pm_default_resume(struct pci_dev *pci_dev) |
434 | { | |
73410429 RW |
435 | pci_fixup_device(pci_fixup_resume, pci_dev); |
436 | ||
cbbc2f6b RW |
437 | if (pci_is_bridge(pci_dev)) |
438 | return 0; | |
571ff758 | 439 | |
cbbc2f6b | 440 | pci_enable_wake(pci_dev, PCI_D0, false); |
bb808945 | 441 | return pci_pm_reenable_device(pci_dev); |
571ff758 RW |
442 | } |
443 | ||
73410429 RW |
444 | static void pci_pm_default_suspend_generic(struct pci_dev *pci_dev) |
445 | { | |
cbbc2f6b RW |
446 | /* If a non-bridge device is enabled at this point, disable it */ |
447 | if (!pci_is_bridge(pci_dev)) | |
448 | pci_disable_enabled_device(pci_dev); | |
73410429 RW |
449 | /* |
450 | * Save state with interrupts enabled, because in principle the bus the | |
451 | * device is on may be put into a low power state after this code runs. | |
452 | */ | |
453 | pci_save_state(pci_dev); | |
454 | } | |
455 | ||
ddb7c9d2 | 456 | static void pci_pm_default_suspend(struct pci_dev *pci_dev, bool prepare) |
571ff758 | 457 | { |
73410429 | 458 | pci_pm_default_suspend_generic(pci_dev); |
571ff758 | 459 | |
ddb7c9d2 | 460 | if (prepare && !pci_is_bridge(pci_dev)) |
571ff758 | 461 | pci_prepare_to_sleep(pci_dev); |
d67e37d7 RW |
462 | |
463 | pci_fixup_device(pci_fixup_suspend, pci_dev); | |
571ff758 RW |
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 RW |
509 | int error = 0; |
510 | ||
ad8cfa1d RW |
511 | if (pci_has_legacy_pm_support(pci_dev)) |
512 | return pci_legacy_suspend(dev, PMSG_SUSPEND); | |
bb808945 | 513 | |
ddb7c9d2 RW |
514 | if (pm && pm->suspend) { |
515 | error = pm->suspend(dev); | |
516 | suspend_report_result(pm->suspend, error); | |
bbb44d9f | 517 | } |
fa58d305 | 518 | |
d67e37d7 | 519 | if (!error) |
ddb7c9d2 | 520 | pci_pm_default_suspend(pci_dev, !!pm); |
bbb44d9f RW |
521 | |
522 | return error; | |
523 | } | |
524 | ||
525 | static int pci_pm_suspend_noirq(struct device *dev) | |
c8958177 | 526 | { |
355a72d7 | 527 | struct pci_dev *pci_dev = to_pci_dev(dev); |
adf09493 | 528 | struct device_driver *drv = dev->driver; |
bbb44d9f | 529 | int error = 0; |
c8958177 | 530 | |
bb808945 RW |
531 | if (pci_has_legacy_pm_support(pci_dev)) |
532 | return pci_legacy_suspend_late(dev, PMSG_SUSPEND); | |
533 | ||
d67e37d7 RW |
534 | if (drv && drv->pm && drv->pm->suspend_noirq) { |
535 | error = drv->pm->suspend_noirq(dev); | |
536 | suspend_report_result(drv->pm->suspend_noirq, error); | |
bbb44d9f RW |
537 | } |
538 | ||
d67e37d7 RW |
539 | if (!error) |
540 | pci_pm_set_unknown_state(pci_dev); | |
541 | ||
bbb44d9f | 542 | return error; |
c8958177 | 543 | } |
1da177e4 | 544 | |
f6dc1e5e | 545 | static int pci_pm_resume_noirq(struct device *dev) |
bbb44d9f RW |
546 | { |
547 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
548 | struct device_driver *drv = dev->driver; | |
355a72d7 | 549 | int error = 0; |
bbb44d9f | 550 | |
aa8c6c93 RW |
551 | pci_pm_default_resume_noirq(pci_dev); |
552 | ||
ad8cfa1d | 553 | if (pci_has_legacy_pm_support(pci_dev)) |
f6dc1e5e | 554 | return pci_legacy_resume_early(dev); |
bb808945 | 555 | |
f6dc1e5e RW |
556 | if (drv && drv->pm && drv->pm->resume_noirq) |
557 | error = drv->pm->resume_noirq(dev); | |
bbb44d9f RW |
558 | |
559 | return error; | |
560 | } | |
561 | ||
f6dc1e5e | 562 | static int pci_pm_resume(struct device *dev) |
bbb44d9f | 563 | { |
355a72d7 | 564 | struct pci_dev *pci_dev = to_pci_dev(dev); |
adf09493 | 565 | struct device_driver *drv = dev->driver; |
bbb44d9f RW |
566 | int error = 0; |
567 | ||
418e4da3 RW |
568 | /* |
569 | * This is necessary for the suspend error path in which resume is | |
570 | * called without restoring the standard config registers of the device. | |
571 | */ | |
572 | if (pci_dev->state_saved) | |
573 | pci_restore_standard_config(pci_dev); | |
574 | ||
ad8cfa1d | 575 | if (pci_has_legacy_pm_support(pci_dev)) |
f6dc1e5e | 576 | return pci_legacy_resume(dev); |
bb808945 | 577 | |
f6dc1e5e | 578 | error = pci_pm_default_resume(pci_dev); |
73410429 | 579 | |
f6dc1e5e RW |
580 | if (!error && drv && drv->pm && drv->pm->resume) |
581 | error = drv->pm->resume(dev); | |
bbb44d9f RW |
582 | |
583 | return error; | |
584 | } | |
585 | ||
586 | #else /* !CONFIG_SUSPEND */ | |
587 | ||
588 | #define pci_pm_suspend NULL | |
589 | #define pci_pm_suspend_noirq NULL | |
590 | #define pci_pm_resume NULL | |
591 | #define pci_pm_resume_noirq NULL | |
592 | ||
593 | #endif /* !CONFIG_SUSPEND */ | |
594 | ||
595 | #ifdef CONFIG_HIBERNATION | |
596 | ||
597 | static int pci_pm_freeze(struct device *dev) | |
598 | { | |
599 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
600 | struct device_driver *drv = dev->driver; | |
601 | int error = 0; | |
602 | ||
ad8cfa1d RW |
603 | if (pci_has_legacy_pm_support(pci_dev)) |
604 | return pci_legacy_suspend(dev, PMSG_FREEZE); | |
bb808945 | 605 | |
d67e37d7 RW |
606 | if (drv && drv->pm && drv->pm->freeze) { |
607 | error = drv->pm->freeze(dev); | |
608 | suspend_report_result(drv->pm->freeze, error); | |
bbb44d9f RW |
609 | } |
610 | ||
d67e37d7 RW |
611 | if (!error) |
612 | pci_pm_default_suspend_generic(pci_dev); | |
613 | ||
bbb44d9f RW |
614 | return error; |
615 | } | |
616 | ||
617 | static int pci_pm_freeze_noirq(struct device *dev) | |
618 | { | |
355a72d7 | 619 | struct pci_dev *pci_dev = to_pci_dev(dev); |
adf09493 | 620 | struct device_driver *drv = dev->driver; |
bbb44d9f RW |
621 | int error = 0; |
622 | ||
bb808945 RW |
623 | if (pci_has_legacy_pm_support(pci_dev)) |
624 | return pci_legacy_suspend_late(dev, PMSG_FREEZE); | |
625 | ||
d67e37d7 RW |
626 | if (drv && drv->pm && drv->pm->freeze_noirq) { |
627 | error = drv->pm->freeze_noirq(dev); | |
628 | suspend_report_result(drv->pm->freeze_noirq, error); | |
bbb44d9f RW |
629 | } |
630 | ||
d67e37d7 RW |
631 | if (!error) |
632 | pci_pm_set_unknown_state(pci_dev); | |
633 | ||
bbb44d9f RW |
634 | return error; |
635 | } | |
636 | ||
f6dc1e5e | 637 | static int pci_pm_thaw_noirq(struct device *dev) |
bbb44d9f | 638 | { |
355a72d7 | 639 | struct pci_dev *pci_dev = to_pci_dev(dev); |
bbb44d9f RW |
640 | struct device_driver *drv = dev->driver; |
641 | int error = 0; | |
642 | ||
ad8cfa1d | 643 | if (pci_has_legacy_pm_support(pci_dev)) |
f6dc1e5e | 644 | return pci_legacy_resume_early(dev); |
bb808945 | 645 | |
f6dc1e5e | 646 | pci_update_current_state(pci_dev, PCI_D0); |
d67e37d7 | 647 | |
f6dc1e5e RW |
648 | if (drv && drv->pm && drv->pm->thaw_noirq) |
649 | error = drv->pm->thaw_noirq(dev); | |
bbb44d9f RW |
650 | |
651 | return error; | |
652 | } | |
653 | ||
f6dc1e5e | 654 | static int pci_pm_thaw(struct device *dev) |
bbb44d9f | 655 | { |
355a72d7 | 656 | struct pci_dev *pci_dev = to_pci_dev(dev); |
adf09493 | 657 | struct device_driver *drv = dev->driver; |
bbb44d9f RW |
658 | int error = 0; |
659 | ||
ad8cfa1d | 660 | if (pci_has_legacy_pm_support(pci_dev)) |
f6dc1e5e | 661 | return pci_legacy_resume(dev); |
bb808945 | 662 | |
f6dc1e5e | 663 | pci_pm_reenable_device(pci_dev); |
d67e37d7 | 664 | |
f6dc1e5e RW |
665 | if (drv && drv->pm && drv->pm->thaw) |
666 | error = drv->pm->thaw(dev); | |
bbb44d9f RW |
667 | |
668 | return error; | |
669 | } | |
670 | ||
671 | static int pci_pm_poweroff(struct device *dev) | |
672 | { | |
355a72d7 | 673 | struct pci_dev *pci_dev = to_pci_dev(dev); |
ddb7c9d2 | 674 | struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; |
bbb44d9f RW |
675 | int error = 0; |
676 | ||
ad8cfa1d RW |
677 | if (pci_has_legacy_pm_support(pci_dev)) |
678 | return pci_legacy_suspend(dev, PMSG_HIBERNATE); | |
bb808945 | 679 | |
ddb7c9d2 RW |
680 | if (pm && pm->poweroff) { |
681 | error = pm->poweroff(dev); | |
682 | suspend_report_result(pm->poweroff, error); | |
bbb44d9f RW |
683 | } |
684 | ||
d67e37d7 | 685 | if (!error) |
ddb7c9d2 | 686 | pci_pm_default_suspend(pci_dev, !!pm); |
c9b9972b | 687 | |
bbb44d9f RW |
688 | return error; |
689 | } | |
690 | ||
691 | static int pci_pm_poweroff_noirq(struct device *dev) | |
692 | { | |
adf09493 | 693 | struct device_driver *drv = dev->driver; |
bbb44d9f RW |
694 | int error = 0; |
695 | ||
bb808945 RW |
696 | if (pci_has_legacy_pm_support(to_pci_dev(dev))) |
697 | return pci_legacy_suspend_late(dev, PMSG_HIBERNATE); | |
698 | ||
d67e37d7 RW |
699 | if (drv && drv->pm && drv->pm->poweroff_noirq) { |
700 | error = drv->pm->poweroff_noirq(dev); | |
701 | suspend_report_result(drv->pm->poweroff_noirq, error); | |
bbb44d9f RW |
702 | } |
703 | ||
704 | return error; | |
705 | } | |
706 | ||
f6dc1e5e | 707 | static int pci_pm_restore_noirq(struct device *dev) |
bbb44d9f RW |
708 | { |
709 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
710 | struct device_driver *drv = dev->driver; | |
355a72d7 | 711 | int error = 0; |
bbb44d9f | 712 | |
aa8c6c93 RW |
713 | pci_pm_default_resume_noirq(pci_dev); |
714 | ||
ad8cfa1d | 715 | if (pci_has_legacy_pm_support(pci_dev)) |
f6dc1e5e | 716 | return pci_legacy_resume_early(dev); |
bb808945 | 717 | |
f6dc1e5e RW |
718 | if (drv && drv->pm && drv->pm->restore_noirq) |
719 | error = drv->pm->restore_noirq(dev); | |
bbb44d9f RW |
720 | |
721 | return error; | |
722 | } | |
723 | ||
f6dc1e5e | 724 | static int pci_pm_restore(struct device *dev) |
bbb44d9f RW |
725 | { |
726 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
adf09493 | 727 | struct device_driver *drv = dev->driver; |
bbb44d9f RW |
728 | int error = 0; |
729 | ||
418e4da3 RW |
730 | /* |
731 | * This is necessary for the hibernation error path in which restore is | |
732 | * called without restoring the standard config registers of the device. | |
733 | */ | |
734 | if (pci_dev->state_saved) | |
735 | pci_restore_standard_config(pci_dev); | |
736 | ||
ad8cfa1d | 737 | if (pci_has_legacy_pm_support(pci_dev)) |
f6dc1e5e | 738 | return pci_legacy_resume(dev); |
bb808945 | 739 | |
f6dc1e5e | 740 | error = pci_pm_default_resume(pci_dev); |
73410429 | 741 | |
f6dc1e5e RW |
742 | if (!error && drv && drv->pm && drv->pm->restore) |
743 | error = drv->pm->restore(dev); | |
bbb44d9f RW |
744 | |
745 | return error; | |
c8958177 | 746 | } |
1da177e4 | 747 | |
bbb44d9f RW |
748 | #else /* !CONFIG_HIBERNATION */ |
749 | ||
750 | #define pci_pm_freeze NULL | |
751 | #define pci_pm_freeze_noirq NULL | |
752 | #define pci_pm_thaw NULL | |
753 | #define pci_pm_thaw_noirq NULL | |
754 | #define pci_pm_poweroff NULL | |
755 | #define pci_pm_poweroff_noirq NULL | |
756 | #define pci_pm_restore NULL | |
757 | #define pci_pm_restore_noirq NULL | |
758 | ||
759 | #endif /* !CONFIG_HIBERNATION */ | |
760 | ||
adf09493 RW |
761 | struct dev_pm_ops pci_dev_pm_ops = { |
762 | .prepare = pci_pm_prepare, | |
763 | .complete = pci_pm_complete, | |
764 | .suspend = pci_pm_suspend, | |
765 | .resume = pci_pm_resume, | |
766 | .freeze = pci_pm_freeze, | |
767 | .thaw = pci_pm_thaw, | |
768 | .poweroff = pci_pm_poweroff, | |
769 | .restore = pci_pm_restore, | |
bbb44d9f RW |
770 | .suspend_noirq = pci_pm_suspend_noirq, |
771 | .resume_noirq = pci_pm_resume_noirq, | |
772 | .freeze_noirq = pci_pm_freeze_noirq, | |
773 | .thaw_noirq = pci_pm_thaw_noirq, | |
774 | .poweroff_noirq = pci_pm_poweroff_noirq, | |
775 | .restore_noirq = pci_pm_restore_noirq, | |
776 | }; | |
777 | ||
adf09493 | 778 | #define PCI_PM_OPS_PTR (&pci_dev_pm_ops) |
bbb44d9f RW |
779 | |
780 | #else /* !CONFIG_PM_SLEEP */ | |
781 | ||
782 | #define PCI_PM_OPS_PTR NULL | |
783 | ||
784 | #endif /* !CONFIG_PM_SLEEP */ | |
785 | ||
1da177e4 | 786 | /** |
863b18f4 | 787 | * __pci_register_driver - register a new pci driver |
1da177e4 | 788 | * @drv: the driver structure to register |
863b18f4 | 789 | * @owner: owner module of drv |
f95d882d | 790 | * @mod_name: module name string |
1da177e4 LT |
791 | * |
792 | * Adds the driver structure to the list of registered drivers. | |
793 | * Returns a negative value on error, otherwise 0. | |
eaae4b3a | 794 | * If no error occurred, the driver remains registered even if |
1da177e4 LT |
795 | * no device was claimed during registration. |
796 | */ | |
725522b5 GKH |
797 | int __pci_register_driver(struct pci_driver *drv, struct module *owner, |
798 | const char *mod_name) | |
1da177e4 LT |
799 | { |
800 | int error; | |
801 | ||
802 | /* initialize common driver fields */ | |
803 | drv->driver.name = drv->name; | |
804 | drv->driver.bus = &pci_bus_type; | |
863b18f4 | 805 | drv->driver.owner = owner; |
725522b5 | 806 | drv->driver.mod_name = mod_name; |
50b00755 | 807 | |
75865858 GKH |
808 | spin_lock_init(&drv->dynids.lock); |
809 | INIT_LIST_HEAD(&drv->dynids.list); | |
1da177e4 LT |
810 | |
811 | /* register with core */ | |
812 | error = driver_register(&drv->driver); | |
50bf14b3 AM |
813 | if (error) |
814 | return error; | |
1da177e4 | 815 | |
50bf14b3 AM |
816 | error = pci_create_newid_file(drv); |
817 | if (error) | |
818 | driver_unregister(&drv->driver); | |
1da177e4 LT |
819 | |
820 | return error; | |
821 | } | |
822 | ||
823 | /** | |
824 | * pci_unregister_driver - unregister a pci driver | |
825 | * @drv: the driver structure to unregister | |
826 | * | |
827 | * Deletes the driver structure from the list of registered PCI drivers, | |
828 | * gives it a chance to clean up by calling its remove() function for | |
829 | * each device it was responsible for, and marks those devices as | |
830 | * driverless. | |
831 | */ | |
832 | ||
833 | void | |
834 | pci_unregister_driver(struct pci_driver *drv) | |
835 | { | |
03d43b19 | 836 | pci_remove_newid_file(drv); |
1da177e4 LT |
837 | driver_unregister(&drv->driver); |
838 | pci_free_dynids(drv); | |
839 | } | |
840 | ||
841 | static struct pci_driver pci_compat_driver = { | |
842 | .name = "compat" | |
843 | }; | |
844 | ||
845 | /** | |
846 | * pci_dev_driver - get the pci_driver of a device | |
847 | * @dev: the device to query | |
848 | * | |
849 | * Returns the appropriate pci_driver structure or %NULL if there is no | |
850 | * registered driver for the device. | |
851 | */ | |
852 | struct pci_driver * | |
853 | pci_dev_driver(const struct pci_dev *dev) | |
854 | { | |
855 | if (dev->driver) | |
856 | return dev->driver; | |
857 | else { | |
858 | int i; | |
859 | for(i=0; i<=PCI_ROM_RESOURCE; i++) | |
860 | if (dev->resource[i].flags & IORESOURCE_BUSY) | |
861 | return &pci_compat_driver; | |
862 | } | |
863 | return NULL; | |
864 | } | |
865 | ||
866 | /** | |
867 | * pci_bus_match - Tell if a PCI device structure has a matching PCI device id structure | |
1da177e4 | 868 | * @dev: the PCI device structure to match against |
8f7020d3 | 869 | * @drv: the device driver to search for matching PCI device id structures |
1da177e4 LT |
870 | * |
871 | * Used by a driver to check whether a PCI device present in the | |
8f7020d3 | 872 | * system is in its list of supported devices. Returns the matching |
1da177e4 LT |
873 | * pci_device_id structure or %NULL if there is no match. |
874 | */ | |
75865858 | 875 | static int pci_bus_match(struct device *dev, struct device_driver *drv) |
1da177e4 | 876 | { |
75865858 GKH |
877 | struct pci_dev *pci_dev = to_pci_dev(dev); |
878 | struct pci_driver *pci_drv = to_pci_driver(drv); | |
1da177e4 LT |
879 | const struct pci_device_id *found_id; |
880 | ||
75865858 | 881 | found_id = pci_match_device(pci_drv, pci_dev); |
1da177e4 LT |
882 | if (found_id) |
883 | return 1; | |
884 | ||
75865858 | 885 | return 0; |
1da177e4 LT |
886 | } |
887 | ||
888 | /** | |
889 | * pci_dev_get - increments the reference count of the pci device structure | |
890 | * @dev: the device being referenced | |
891 | * | |
892 | * Each live reference to a device should be refcounted. | |
893 | * | |
894 | * Drivers for PCI devices should normally record such references in | |
895 | * their probe() methods, when they bind to a device, and release | |
896 | * them by calling pci_dev_put(), in their disconnect() methods. | |
897 | * | |
898 | * A pointer to the device with the incremented reference counter is returned. | |
899 | */ | |
900 | struct pci_dev *pci_dev_get(struct pci_dev *dev) | |
901 | { | |
902 | if (dev) | |
903 | get_device(&dev->dev); | |
904 | return dev; | |
905 | } | |
906 | ||
907 | /** | |
908 | * pci_dev_put - release a use of the pci device structure | |
909 | * @dev: device that's been disconnected | |
910 | * | |
911 | * Must be called when a user of a device is finished with it. When the last | |
912 | * user of the device calls this function, the memory of the device is freed. | |
913 | */ | |
914 | void pci_dev_put(struct pci_dev *dev) | |
915 | { | |
916 | if (dev) | |
917 | put_device(&dev->dev); | |
918 | } | |
919 | ||
920 | #ifndef CONFIG_HOTPLUG | |
7eff2e7a | 921 | int pci_uevent(struct device *dev, struct kobj_uevent_env *env) |
1da177e4 LT |
922 | { |
923 | return -ENODEV; | |
924 | } | |
925 | #endif | |
926 | ||
927 | struct bus_type pci_bus_type = { | |
928 | .name = "pci", | |
929 | .match = pci_bus_match, | |
312c004d | 930 | .uevent = pci_uevent, |
b15d686a RK |
931 | .probe = pci_device_probe, |
932 | .remove = pci_device_remove, | |
cbd69dbb | 933 | .shutdown = pci_device_shutdown, |
1da177e4 | 934 | .dev_attrs = pci_dev_attrs, |
bbb44d9f | 935 | .pm = PCI_PM_OPS_PTR, |
1da177e4 LT |
936 | }; |
937 | ||
938 | static int __init pci_driver_init(void) | |
939 | { | |
940 | return bus_register(&pci_bus_type); | |
941 | } | |
942 | ||
943 | postcore_initcall(pci_driver_init); | |
944 | ||
75865858 | 945 | EXPORT_SYMBOL(pci_match_id); |
863b18f4 | 946 | EXPORT_SYMBOL(__pci_register_driver); |
1da177e4 LT |
947 | EXPORT_SYMBOL(pci_unregister_driver); |
948 | EXPORT_SYMBOL(pci_dev_driver); | |
949 | EXPORT_SYMBOL(pci_bus_type); | |
950 | EXPORT_SYMBOL(pci_dev_get); | |
951 | EXPORT_SYMBOL(pci_dev_put); |