2 * drivers/pci/pci-driver.c
4 * (C) Copyright 2002-2004, 2007 Greg Kroah-Hartman <greg@kroah.com>
5 * (C) Copyright 2007 Novell Inc.
7 * Released under the GPL v2 only.
11 #include <linux/pci.h>
12 #include <linux/module.h>
13 #include <linux/init.h>
14 #include <linux/device.h>
15 #include <linux/mempolicy.h>
16 #include <linux/string.h>
17 #include <linux/slab.h>
18 #include <linux/sched.h>
19 #include <linux/cpu.h>
23 * Dynamic device IDs are disabled for !CONFIG_HOTPLUG
27 struct list_head node;
28 struct pci_device_id id;
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
39 * Adds a new dynamic pci device ID to this driver,
40 * and causes the driver to probe for all devices again.
43 store_new_id(struct device_driver *driver, const char *buf, size_t count)
45 struct pci_dynid *dynid;
46 struct pci_driver *pdrv = to_pci_driver(driver);
47 const struct pci_device_id *ids = pdrv->id_table;
48 __u32 vendor, device, subvendor=PCI_ANY_ID,
49 subdevice=PCI_ANY_ID, class=0, class_mask=0;
50 unsigned long driver_data=0;
54 fields = sscanf(buf, "%x %x %x %x %x %x %lx",
55 &vendor, &device, &subvendor, &subdevice,
56 &class, &class_mask, &driver_data);
60 /* Only accept driver_data values that match an existing id_table
64 while (ids->vendor || ids->subvendor || ids->class_mask) {
65 if (driver_data == ids->driver_data) {
71 if (retval) /* No match */
75 dynid = kzalloc(sizeof(*dynid), GFP_KERNEL);
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;
85 dynid->id.driver_data = driver_data;
87 spin_lock(&pdrv->dynids.lock);
88 list_add_tail(&dynid->node, &pdrv->dynids.list);
89 spin_unlock(&pdrv->dynids.lock);
91 if (get_driver(&pdrv->driver)) {
92 retval = driver_attach(&pdrv->driver);
93 put_driver(&pdrv->driver);
100 static DRIVER_ATTR(new_id, S_IWUSR, NULL, store_new_id);
103 * store_remove_id - remove a PCI device ID from this driver
104 * @driver: target device driver
105 * @buf: buffer for scanning device ID data
108 * Removes a dynamic pci device ID to this driver.
111 store_remove_id(struct device_driver *driver, const char *buf, size_t count)
113 struct pci_dynid *dynid, *n;
114 struct pci_driver *pdrv = to_pci_driver(driver);
115 __u32 vendor, device, subvendor = PCI_ANY_ID,
116 subdevice = PCI_ANY_ID, class = 0, class_mask = 0;
118 int retval = -ENODEV;
120 fields = sscanf(buf, "%x %x %x %x %x %x",
121 &vendor, &device, &subvendor, &subdevice,
122 &class, &class_mask);
126 spin_lock(&pdrv->dynids.lock);
127 list_for_each_entry_safe(dynid, n, &pdrv->dynids.list, node) {
128 struct pci_device_id *id = &dynid->id;
129 if ((id->vendor == vendor) &&
130 (id->device == device) &&
131 (subvendor == PCI_ANY_ID || id->subvendor == subvendor) &&
132 (subdevice == PCI_ANY_ID || id->subdevice == subdevice) &&
133 !((id->class ^ class) & class_mask)) {
134 list_del(&dynid->node);
140 spin_unlock(&pdrv->dynids.lock);
146 static DRIVER_ATTR(remove_id, S_IWUSR, NULL, store_remove_id);
149 pci_free_dynids(struct pci_driver *drv)
151 struct pci_dynid *dynid, *n;
153 spin_lock(&drv->dynids.lock);
154 list_for_each_entry_safe(dynid, n, &drv->dynids.list, node) {
155 list_del(&dynid->node);
158 spin_unlock(&drv->dynids.lock);
162 pci_create_newid_file(struct pci_driver *drv)
165 if (drv->probe != NULL)
166 error = driver_create_file(&drv->driver, &driver_attr_new_id);
170 static void pci_remove_newid_file(struct pci_driver *drv)
172 driver_remove_file(&drv->driver, &driver_attr_new_id);
176 pci_create_removeid_file(struct pci_driver *drv)
179 if (drv->probe != NULL)
180 error = driver_create_file(&drv->driver,&driver_attr_remove_id);
184 static void pci_remove_removeid_file(struct pci_driver *drv)
186 driver_remove_file(&drv->driver, &driver_attr_remove_id);
188 #else /* !CONFIG_HOTPLUG */
189 static inline void pci_free_dynids(struct pci_driver *drv) {}
190 static inline int pci_create_newid_file(struct pci_driver *drv)
194 static inline void pci_remove_newid_file(struct pci_driver *drv) {}
195 static inline int pci_create_removeid_file(struct pci_driver *drv)
199 static inline void pci_remove_removeid_file(struct pci_driver *drv) {}
203 * pci_match_id - See if a pci device matches a given pci_id table
204 * @ids: array of PCI device id structures to search in
205 * @dev: the PCI device structure to match against.
207 * Used by a driver to check whether a PCI device present in the
208 * system is in its list of supported devices. Returns the matching
209 * pci_device_id structure or %NULL if there is no match.
211 * Deprecated, don't use this as it will not catch any dynamic ids
212 * that a driver might want to check for.
214 const struct pci_device_id *pci_match_id(const struct pci_device_id *ids,
218 while (ids->vendor || ids->subvendor || ids->class_mask) {
219 if (pci_match_one_device(ids, dev))
228 * pci_match_device - Tell if a PCI device structure has a matching PCI device id structure
229 * @drv: the PCI driver to match against
230 * @dev: the PCI device structure to match against
232 * Used by a driver to check whether a PCI device present in the
233 * system is in its list of supported devices. Returns the matching
234 * pci_device_id structure or %NULL if there is no match.
236 static const struct pci_device_id *pci_match_device(struct pci_driver *drv,
239 struct pci_dynid *dynid;
241 /* Look at the dynamic ids first, before the static ones */
242 spin_lock(&drv->dynids.lock);
243 list_for_each_entry(dynid, &drv->dynids.list, node) {
244 if (pci_match_one_device(&dynid->id, dev)) {
245 spin_unlock(&drv->dynids.lock);
249 spin_unlock(&drv->dynids.lock);
251 return pci_match_id(drv->id_table, dev);
254 struct drv_dev_and_id {
255 struct pci_driver *drv;
257 const struct pci_device_id *id;
260 static long local_pci_probe(void *_ddi)
262 struct drv_dev_and_id *ddi = _ddi;
264 return ddi->drv->probe(ddi->dev, ddi->id);
267 static int pci_call_probe(struct pci_driver *drv, struct pci_dev *dev,
268 const struct pci_device_id *id)
271 struct drv_dev_and_id ddi = { drv, dev, id };
273 /* Execute driver initialization on node where the device's
274 bus is attached to. This way the driver likely allocates
275 its local memory on the right node without any need to
277 node = dev_to_node(&dev->dev);
282 cpu = cpumask_any_and(cpumask_of_node(node), cpu_online_mask);
283 if (cpu < nr_cpu_ids)
284 error = work_on_cpu(cpu, local_pci_probe, &ddi);
286 error = local_pci_probe(&ddi);
289 error = local_pci_probe(&ddi);
294 * __pci_device_probe()
295 * @drv: driver to call to check if it wants the PCI device
296 * @pci_dev: PCI device being probed
298 * returns 0 on success, else error.
299 * side-effect: pci_dev->driver is set to drv when drv claims pci_dev.
302 __pci_device_probe(struct pci_driver *drv, struct pci_dev *pci_dev)
304 const struct pci_device_id *id;
307 if (!pci_dev->driver && drv->probe) {
310 id = pci_match_device(drv, pci_dev);
312 error = pci_call_probe(drv, pci_dev, id);
314 pci_dev->driver = drv;
321 static int pci_device_probe(struct device * dev)
324 struct pci_driver *drv;
325 struct pci_dev *pci_dev;
327 drv = to_pci_driver(dev->driver);
328 pci_dev = to_pci_dev(dev);
329 pci_dev_get(pci_dev);
330 error = __pci_device_probe(drv, pci_dev);
332 pci_dev_put(pci_dev);
337 static int pci_device_remove(struct device * dev)
339 struct pci_dev * pci_dev = to_pci_dev(dev);
340 struct pci_driver * drv = pci_dev->driver;
344 drv->remove(pci_dev);
345 pci_dev->driver = NULL;
349 * If the device is still on, set the power state as "unknown",
350 * since it might change by the next time we load the driver.
352 if (pci_dev->current_state == PCI_D0)
353 pci_dev->current_state = PCI_UNKNOWN;
356 * We would love to complain here if pci_dev->is_enabled is set, that
357 * the driver should have called pci_disable_device(), but the
358 * unfortunate fact is there are too many odd BIOS and bridge setups
359 * that don't like drivers doing that all of the time.
360 * Oh well, we can dream of sane hardware when we sleep, no matter how
361 * horrible the crap we have to deal with is when we are awake...
364 pci_dev_put(pci_dev);
368 static void pci_device_shutdown(struct device *dev)
370 struct pci_dev *pci_dev = to_pci_dev(dev);
371 struct pci_driver *drv = pci_dev->driver;
373 if (drv && drv->shutdown)
374 drv->shutdown(pci_dev);
375 pci_msi_shutdown(pci_dev);
376 pci_msix_shutdown(pci_dev);
379 #ifdef CONFIG_PM_SLEEP
382 * Default "suspend" method for devices that have no driver provided suspend,
383 * or not even a driver at all (second part).
385 static void pci_pm_set_unknown_state(struct pci_dev *pci_dev)
388 * mark its power state as "unknown", since we don't know if
389 * e.g. the BIOS will change its device state when we suspend.
391 if (pci_dev->current_state == PCI_D0)
392 pci_dev->current_state = PCI_UNKNOWN;
396 * Default "resume" method for devices that have no driver provided resume,
397 * or not even a driver at all (second part).
399 static int pci_pm_reenable_device(struct pci_dev *pci_dev)
403 /* if the device was enabled before suspend, reenable */
404 retval = pci_reenable_device(pci_dev);
406 * if the device was busmaster before the suspend, make it busmaster
409 if (pci_dev->is_busmaster)
410 pci_set_master(pci_dev);
415 static int pci_legacy_suspend(struct device *dev, pm_message_t state)
417 struct pci_dev * pci_dev = to_pci_dev(dev);
418 struct pci_driver * drv = pci_dev->driver;
420 pci_dev->state_saved = false;
422 if (drv && drv->suspend) {
423 pci_power_t prev = pci_dev->current_state;
426 error = drv->suspend(pci_dev, state);
427 suspend_report_result(drv->suspend, error);
431 if (!pci_dev->state_saved && pci_dev->current_state != PCI_D0
432 && pci_dev->current_state != PCI_UNKNOWN) {
433 WARN_ONCE(pci_dev->current_state != prev,
434 "PCI PM: Device state not saved by %pF\n",
439 pci_fixup_device(pci_fixup_suspend, pci_dev);
444 static int pci_legacy_suspend_late(struct device *dev, pm_message_t state)
446 struct pci_dev * pci_dev = to_pci_dev(dev);
447 struct pci_driver * drv = pci_dev->driver;
449 if (drv && drv->suspend_late) {
450 pci_power_t prev = pci_dev->current_state;
453 error = drv->suspend_late(pci_dev, state);
454 suspend_report_result(drv->suspend_late, error);
458 if (!pci_dev->state_saved && pci_dev->current_state != PCI_D0
459 && pci_dev->current_state != PCI_UNKNOWN) {
460 WARN_ONCE(pci_dev->current_state != prev,
461 "PCI PM: Device state not saved by %pF\n",
467 if (!pci_dev->state_saved)
468 pci_save_state(pci_dev);
470 pci_pm_set_unknown_state(pci_dev);
475 static int pci_legacy_resume_early(struct device *dev)
477 struct pci_dev * pci_dev = to_pci_dev(dev);
478 struct pci_driver * drv = pci_dev->driver;
480 return drv && drv->resume_early ?
481 drv->resume_early(pci_dev) : 0;
484 static int pci_legacy_resume(struct device *dev)
486 struct pci_dev * pci_dev = to_pci_dev(dev);
487 struct pci_driver * drv = pci_dev->driver;
489 pci_fixup_device(pci_fixup_resume, pci_dev);
491 return drv && drv->resume ?
492 drv->resume(pci_dev) : pci_pm_reenable_device(pci_dev);
495 /* Auxiliary functions used by the new power management framework */
498 * pci_restore_standard_config - restore standard config registers of PCI device
499 * @pci_dev: PCI device to handle
501 static int pci_restore_standard_config(struct pci_dev *pci_dev)
503 pci_update_current_state(pci_dev, PCI_UNKNOWN);
505 if (pci_dev->current_state != PCI_D0) {
506 int error = pci_set_power_state(pci_dev, PCI_D0);
511 return pci_dev->state_saved ? pci_restore_state(pci_dev) : 0;
514 static void pci_pm_default_resume_noirq(struct pci_dev *pci_dev)
516 pci_restore_standard_config(pci_dev);
517 pci_dev->state_saved = false;
518 pci_fixup_device(pci_fixup_resume_early, pci_dev);
521 static void pci_pm_default_resume(struct pci_dev *pci_dev)
523 pci_fixup_device(pci_fixup_resume, pci_dev);
525 if (!pci_is_bridge(pci_dev))
526 pci_enable_wake(pci_dev, PCI_D0, false);
529 static void pci_pm_default_suspend(struct pci_dev *pci_dev)
531 /* Disable non-bridge devices without PM support */
532 if (!pci_is_bridge(pci_dev))
533 pci_disable_enabled_device(pci_dev);
536 static bool pci_has_legacy_pm_support(struct pci_dev *pci_dev)
538 struct pci_driver *drv = pci_dev->driver;
539 bool ret = drv && (drv->suspend || drv->suspend_late || drv->resume
540 || drv->resume_early);
543 * Legacy PM support is used by default, so warn if the new framework is
544 * supported as well. Drivers are supposed to support either the
545 * former, or the latter, but not both at the same time.
547 WARN_ON(ret && drv->driver.pm);
552 /* New power management framework */
554 static int pci_pm_prepare(struct device *dev)
556 struct device_driver *drv = dev->driver;
559 if (drv && drv->pm && drv->pm->prepare)
560 error = drv->pm->prepare(dev);
565 static void pci_pm_complete(struct device *dev)
567 struct device_driver *drv = dev->driver;
569 if (drv && drv->pm && drv->pm->complete)
570 drv->pm->complete(dev);
573 #ifdef CONFIG_SUSPEND
575 static int pci_pm_suspend(struct device *dev)
577 struct pci_dev *pci_dev = to_pci_dev(dev);
578 struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
580 if (pci_has_legacy_pm_support(pci_dev))
581 return pci_legacy_suspend(dev, PMSG_SUSPEND);
583 pci_dev->state_saved = false;
586 pci_pm_default_suspend(pci_dev);
591 pci_power_t prev = pci_dev->current_state;
594 error = pm->suspend(dev);
595 suspend_report_result(pm->suspend, error);
599 if (!pci_dev->state_saved && pci_dev->current_state != PCI_D0
600 && pci_dev->current_state != PCI_UNKNOWN) {
601 WARN_ONCE(pci_dev->current_state != prev,
602 "PCI PM: State of device not saved by %pF\n",
608 pci_fixup_device(pci_fixup_suspend, pci_dev);
613 static int pci_pm_suspend_noirq(struct device *dev)
615 struct pci_dev *pci_dev = to_pci_dev(dev);
616 struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
618 if (pci_has_legacy_pm_support(pci_dev))
619 return pci_legacy_suspend_late(dev, PMSG_SUSPEND);
622 pci_save_state(pci_dev);
626 if (pm->suspend_noirq) {
627 pci_power_t prev = pci_dev->current_state;
630 error = pm->suspend_noirq(dev);
631 suspend_report_result(pm->suspend_noirq, error);
635 if (!pci_dev->state_saved && pci_dev->current_state != PCI_D0
636 && pci_dev->current_state != PCI_UNKNOWN) {
637 WARN_ONCE(pci_dev->current_state != prev,
638 "PCI PM: State of device not saved by %pF\n",
644 if (!pci_dev->state_saved) {
645 pci_save_state(pci_dev);
646 if (!pci_is_bridge(pci_dev))
647 pci_prepare_to_sleep(pci_dev);
650 pci_pm_set_unknown_state(pci_dev);
655 static int pci_pm_resume_noirq(struct device *dev)
657 struct pci_dev *pci_dev = to_pci_dev(dev);
658 struct device_driver *drv = dev->driver;
661 pci_pm_default_resume_noirq(pci_dev);
663 if (pci_has_legacy_pm_support(pci_dev))
664 return pci_legacy_resume_early(dev);
666 if (drv && drv->pm && drv->pm->resume_noirq)
667 error = drv->pm->resume_noirq(dev);
672 static int pci_pm_resume(struct device *dev)
674 struct pci_dev *pci_dev = to_pci_dev(dev);
675 struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
679 * This is necessary for the suspend error path in which resume is
680 * called without restoring the standard config registers of the device.
682 if (pci_dev->state_saved)
683 pci_restore_standard_config(pci_dev);
685 if (pci_has_legacy_pm_support(pci_dev))
686 return pci_legacy_resume(dev);
688 pci_pm_default_resume(pci_dev);
692 error = pm->resume(dev);
694 pci_pm_reenable_device(pci_dev);
700 #else /* !CONFIG_SUSPEND */
702 #define pci_pm_suspend NULL
703 #define pci_pm_suspend_noirq NULL
704 #define pci_pm_resume NULL
705 #define pci_pm_resume_noirq NULL
707 #endif /* !CONFIG_SUSPEND */
709 #ifdef CONFIG_HIBERNATION
711 static int pci_pm_freeze(struct device *dev)
713 struct pci_dev *pci_dev = to_pci_dev(dev);
714 struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
716 if (pci_has_legacy_pm_support(pci_dev))
717 return pci_legacy_suspend(dev, PMSG_FREEZE);
719 pci_dev->state_saved = false;
722 pci_pm_default_suspend(pci_dev);
729 error = pm->freeze(dev);
730 suspend_report_result(pm->freeze, error);
738 static int pci_pm_freeze_noirq(struct device *dev)
740 struct pci_dev *pci_dev = to_pci_dev(dev);
741 struct device_driver *drv = dev->driver;
743 if (pci_has_legacy_pm_support(pci_dev))
744 return pci_legacy_suspend_late(dev, PMSG_FREEZE);
746 if (drv && drv->pm && drv->pm->freeze_noirq) {
749 error = drv->pm->freeze_noirq(dev);
750 suspend_report_result(drv->pm->freeze_noirq, error);
755 if (!pci_dev->state_saved)
756 pci_save_state(pci_dev);
758 pci_pm_set_unknown_state(pci_dev);
763 static int pci_pm_thaw_noirq(struct device *dev)
765 struct pci_dev *pci_dev = to_pci_dev(dev);
766 struct device_driver *drv = dev->driver;
769 if (pci_has_legacy_pm_support(pci_dev))
770 return pci_legacy_resume_early(dev);
772 pci_update_current_state(pci_dev, PCI_D0);
774 if (drv && drv->pm && drv->pm->thaw_noirq)
775 error = drv->pm->thaw_noirq(dev);
780 static int pci_pm_thaw(struct device *dev)
782 struct pci_dev *pci_dev = to_pci_dev(dev);
783 struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
786 if (pci_has_legacy_pm_support(pci_dev))
787 return pci_legacy_resume(dev);
791 error = pm->thaw(dev);
793 pci_pm_reenable_device(pci_dev);
799 static int pci_pm_poweroff(struct device *dev)
801 struct pci_dev *pci_dev = to_pci_dev(dev);
802 struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
804 if (pci_has_legacy_pm_support(pci_dev))
805 return pci_legacy_suspend(dev, PMSG_HIBERNATE);
807 pci_dev->state_saved = false;
810 pci_pm_default_suspend(pci_dev);
817 error = pm->poweroff(dev);
818 suspend_report_result(pm->poweroff, error);
824 pci_fixup_device(pci_fixup_suspend, pci_dev);
829 static int pci_pm_poweroff_noirq(struct device *dev)
831 struct pci_dev *pci_dev = to_pci_dev(dev);
832 struct device_driver *drv = dev->driver;
834 if (pci_has_legacy_pm_support(to_pci_dev(dev)))
835 return pci_legacy_suspend_late(dev, PMSG_HIBERNATE);
837 if (!drv || !drv->pm)
840 if (drv->pm->poweroff_noirq) {
843 error = drv->pm->poweroff_noirq(dev);
844 suspend_report_result(drv->pm->poweroff_noirq, error);
849 if (!pci_dev->state_saved && !pci_is_bridge(pci_dev))
850 pci_prepare_to_sleep(pci_dev);
855 static int pci_pm_restore_noirq(struct device *dev)
857 struct pci_dev *pci_dev = to_pci_dev(dev);
858 struct device_driver *drv = dev->driver;
861 pci_pm_default_resume_noirq(pci_dev);
863 if (pci_has_legacy_pm_support(pci_dev))
864 return pci_legacy_resume_early(dev);
866 if (drv && drv->pm && drv->pm->restore_noirq)
867 error = drv->pm->restore_noirq(dev);
872 static int pci_pm_restore(struct device *dev)
874 struct pci_dev *pci_dev = to_pci_dev(dev);
875 struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
879 * This is necessary for the hibernation error path in which restore is
880 * called without restoring the standard config registers of the device.
882 if (pci_dev->state_saved)
883 pci_restore_standard_config(pci_dev);
885 if (pci_has_legacy_pm_support(pci_dev))
886 return pci_legacy_resume(dev);
888 pci_pm_default_resume(pci_dev);
892 error = pm->restore(dev);
894 pci_pm_reenable_device(pci_dev);
900 #else /* !CONFIG_HIBERNATION */
902 #define pci_pm_freeze NULL
903 #define pci_pm_freeze_noirq NULL
904 #define pci_pm_thaw NULL
905 #define pci_pm_thaw_noirq NULL
906 #define pci_pm_poweroff NULL
907 #define pci_pm_poweroff_noirq NULL
908 #define pci_pm_restore NULL
909 #define pci_pm_restore_noirq NULL
911 #endif /* !CONFIG_HIBERNATION */
913 struct dev_pm_ops pci_dev_pm_ops = {
914 .prepare = pci_pm_prepare,
915 .complete = pci_pm_complete,
916 .suspend = pci_pm_suspend,
917 .resume = pci_pm_resume,
918 .freeze = pci_pm_freeze,
920 .poweroff = pci_pm_poweroff,
921 .restore = pci_pm_restore,
922 .suspend_noirq = pci_pm_suspend_noirq,
923 .resume_noirq = pci_pm_resume_noirq,
924 .freeze_noirq = pci_pm_freeze_noirq,
925 .thaw_noirq = pci_pm_thaw_noirq,
926 .poweroff_noirq = pci_pm_poweroff_noirq,
927 .restore_noirq = pci_pm_restore_noirq,
930 #define PCI_PM_OPS_PTR (&pci_dev_pm_ops)
932 #else /* !CONFIG_PM_SLEEP */
934 #define PCI_PM_OPS_PTR NULL
936 #endif /* !CONFIG_PM_SLEEP */
939 * __pci_register_driver - register a new pci driver
940 * @drv: the driver structure to register
941 * @owner: owner module of drv
942 * @mod_name: module name string
944 * Adds the driver structure to the list of registered drivers.
945 * Returns a negative value on error, otherwise 0.
946 * If no error occurred, the driver remains registered even if
947 * no device was claimed during registration.
949 int __pci_register_driver(struct pci_driver *drv, struct module *owner,
950 const char *mod_name)
954 /* initialize common driver fields */
955 drv->driver.name = drv->name;
956 drv->driver.bus = &pci_bus_type;
957 drv->driver.owner = owner;
958 drv->driver.mod_name = mod_name;
960 spin_lock_init(&drv->dynids.lock);
961 INIT_LIST_HEAD(&drv->dynids.list);
963 /* register with core */
964 error = driver_register(&drv->driver);
968 error = pci_create_newid_file(drv);
972 error = pci_create_removeid_file(drv);
979 pci_remove_newid_file(drv);
981 driver_unregister(&drv->driver);
986 * pci_unregister_driver - unregister a pci driver
987 * @drv: the driver structure to unregister
989 * Deletes the driver structure from the list of registered PCI drivers,
990 * gives it a chance to clean up by calling its remove() function for
991 * each device it was responsible for, and marks those devices as
996 pci_unregister_driver(struct pci_driver *drv)
998 pci_remove_removeid_file(drv);
999 pci_remove_newid_file(drv);
1000 driver_unregister(&drv->driver);
1001 pci_free_dynids(drv);
1004 static struct pci_driver pci_compat_driver = {
1009 * pci_dev_driver - get the pci_driver of a device
1010 * @dev: the device to query
1012 * Returns the appropriate pci_driver structure or %NULL if there is no
1013 * registered driver for the device.
1016 pci_dev_driver(const struct pci_dev *dev)
1022 for(i=0; i<=PCI_ROM_RESOURCE; i++)
1023 if (dev->resource[i].flags & IORESOURCE_BUSY)
1024 return &pci_compat_driver;
1030 * pci_bus_match - Tell if a PCI device structure has a matching PCI device id structure
1031 * @dev: the PCI device structure to match against
1032 * @drv: the device driver to search for matching PCI device id structures
1034 * Used by a driver to check whether a PCI device present in the
1035 * system is in its list of supported devices. Returns the matching
1036 * pci_device_id structure or %NULL if there is no match.
1038 static int pci_bus_match(struct device *dev, struct device_driver *drv)
1040 struct pci_dev *pci_dev = to_pci_dev(dev);
1041 struct pci_driver *pci_drv = to_pci_driver(drv);
1042 const struct pci_device_id *found_id;
1044 found_id = pci_match_device(pci_drv, pci_dev);
1052 * pci_dev_get - increments the reference count of the pci device structure
1053 * @dev: the device being referenced
1055 * Each live reference to a device should be refcounted.
1057 * Drivers for PCI devices should normally record such references in
1058 * their probe() methods, when they bind to a device, and release
1059 * them by calling pci_dev_put(), in their disconnect() methods.
1061 * A pointer to the device with the incremented reference counter is returned.
1063 struct pci_dev *pci_dev_get(struct pci_dev *dev)
1066 get_device(&dev->dev);
1071 * pci_dev_put - release a use of the pci device structure
1072 * @dev: device that's been disconnected
1074 * Must be called when a user of a device is finished with it. When the last
1075 * user of the device calls this function, the memory of the device is freed.
1077 void pci_dev_put(struct pci_dev *dev)
1080 put_device(&dev->dev);
1083 #ifndef CONFIG_HOTPLUG
1084 int pci_uevent(struct device *dev, struct kobj_uevent_env *env)
1090 struct bus_type pci_bus_type = {
1092 .match = pci_bus_match,
1093 .uevent = pci_uevent,
1094 .probe = pci_device_probe,
1095 .remove = pci_device_remove,
1096 .shutdown = pci_device_shutdown,
1097 .dev_attrs = pci_dev_attrs,
1098 .bus_attrs = pci_bus_attrs,
1099 .pm = PCI_PM_OPS_PTR,
1102 static int __init pci_driver_init(void)
1104 return bus_register(&pci_bus_type);
1107 postcore_initcall(pci_driver_init);
1109 EXPORT_SYMBOL(pci_match_id);
1110 EXPORT_SYMBOL(__pci_register_driver);
1111 EXPORT_SYMBOL(pci_unregister_driver);
1112 EXPORT_SYMBOL(pci_dev_driver);
1113 EXPORT_SYMBOL(pci_bus_type);
1114 EXPORT_SYMBOL(pci_dev_get);
1115 EXPORT_SYMBOL(pci_dev_put);