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 pci_free_dynids(struct pci_driver *drv)
105 struct pci_dynid *dynid, *n;
107 spin_lock(&drv->dynids.lock);
108 list_for_each_entry_safe(dynid, n, &drv->dynids.list, node) {
109 list_del(&dynid->node);
112 spin_unlock(&drv->dynids.lock);
116 pci_create_newid_file(struct pci_driver *drv)
119 if (drv->probe != NULL)
120 error = driver_create_file(&drv->driver, &driver_attr_new_id);
124 static void pci_remove_newid_file(struct pci_driver *drv)
126 driver_remove_file(&drv->driver, &driver_attr_new_id);
128 #else /* !CONFIG_HOTPLUG */
129 static inline void pci_free_dynids(struct pci_driver *drv) {}
130 static inline int pci_create_newid_file(struct pci_driver *drv)
134 static inline void pci_remove_newid_file(struct pci_driver *drv) {}
138 * pci_match_id - See if a pci device matches a given pci_id table
139 * @ids: array of PCI device id structures to search in
140 * @dev: the PCI device structure to match against.
142 * Used by a driver to check whether a PCI device present in the
143 * system is in its list of supported devices. Returns the matching
144 * pci_device_id structure or %NULL if there is no match.
146 * Deprecated, don't use this as it will not catch any dynamic ids
147 * that a driver might want to check for.
149 const struct pci_device_id *pci_match_id(const struct pci_device_id *ids,
153 while (ids->vendor || ids->subvendor || ids->class_mask) {
154 if (pci_match_one_device(ids, dev))
163 * pci_match_device - Tell if a PCI device structure has a matching PCI device id structure
164 * @drv: the PCI driver to match against
165 * @dev: the PCI device structure to match against
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.
171 static const struct pci_device_id *pci_match_device(struct pci_driver *drv,
174 struct pci_dynid *dynid;
176 /* Look at the dynamic ids first, before the static ones */
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);
184 spin_unlock(&drv->dynids.lock);
186 return pci_match_id(drv->id_table, dev);
189 struct drv_dev_and_id {
190 struct pci_driver *drv;
192 const struct pci_device_id *id;
195 static long local_pci_probe(void *_ddi)
197 struct drv_dev_and_id *ddi = _ddi;
199 return ddi->drv->probe(ddi->dev, ddi->id);
202 static int pci_call_probe(struct pci_driver *drv, struct pci_dev *dev,
203 const struct pci_device_id *id)
206 struct drv_dev_and_id ddi = { drv, dev, id };
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
212 node = dev_to_node(&dev->dev);
215 node_to_cpumask_ptr(nodecpumask, node);
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);
222 error = local_pci_probe(&ddi);
225 error = local_pci_probe(&ddi);
230 * __pci_device_probe()
231 * @drv: driver to call to check if it wants the PCI device
232 * @pci_dev: PCI device being probed
234 * returns 0 on success, else error.
235 * side-effect: pci_dev->driver is set to drv when drv claims pci_dev.
238 __pci_device_probe(struct pci_driver *drv, struct pci_dev *pci_dev)
240 const struct pci_device_id *id;
243 if (!pci_dev->driver && drv->probe) {
246 id = pci_match_device(drv, pci_dev);
248 error = pci_call_probe(drv, pci_dev, id);
250 pci_dev->driver = drv;
257 static int pci_device_probe(struct device * dev)
260 struct pci_driver *drv;
261 struct pci_dev *pci_dev;
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);
268 pci_dev_put(pci_dev);
273 static int pci_device_remove(struct device * dev)
275 struct pci_dev * pci_dev = to_pci_dev(dev);
276 struct pci_driver * drv = pci_dev->driver;
280 drv->remove(pci_dev);
281 pci_dev->driver = NULL;
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.
288 if (pci_dev->current_state == PCI_D0)
289 pci_dev->current_state = PCI_UNKNOWN;
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...
300 pci_dev_put(pci_dev);
304 static void pci_device_shutdown(struct device *dev)
306 struct pci_dev *pci_dev = to_pci_dev(dev);
307 struct pci_driver *drv = pci_dev->driver;
309 if (drv && drv->shutdown)
310 drv->shutdown(pci_dev);
311 pci_msi_shutdown(pci_dev);
312 pci_msix_shutdown(pci_dev);
315 #ifdef CONFIG_PM_SLEEP
318 * Default "suspend" method for devices that have no driver provided suspend,
319 * or not even a driver at all (second part).
321 static void pci_pm_set_unknown_state(struct pci_dev *pci_dev)
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.
327 if (pci_dev->current_state == PCI_D0)
328 pci_dev->current_state = PCI_UNKNOWN;
332 * Default "resume" method for devices that have no driver provided resume,
333 * or not even a driver at all (second part).
335 static int pci_pm_reenable_device(struct pci_dev *pci_dev)
339 /* if the device was enabled before suspend, reenable */
340 retval = pci_reenable_device(pci_dev);
342 * if the device was busmaster before the suspend, make it busmaster
345 if (pci_dev->is_busmaster)
346 pci_set_master(pci_dev);
351 static int pci_legacy_suspend(struct device *dev, pm_message_t state)
353 struct pci_dev * pci_dev = to_pci_dev(dev);
354 struct pci_driver * drv = pci_dev->driver;
357 if (drv && drv->suspend) {
358 pci_power_t prev = pci_dev->current_state;
360 pci_dev->state_saved = false;
362 i = drv->suspend(pci_dev, state);
363 suspend_report_result(drv->suspend, i);
367 if (pci_dev->state_saved)
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",
379 pci_save_state(pci_dev);
381 * This is for compatibility with existing code with legacy PM support.
383 pci_pm_set_unknown_state(pci_dev);
386 pci_fixup_device(pci_fixup_suspend, pci_dev);
391 static int pci_legacy_suspend_late(struct device *dev, pm_message_t state)
393 struct pci_dev * pci_dev = to_pci_dev(dev);
394 struct pci_driver * drv = pci_dev->driver;
397 if (drv && drv->suspend_late) {
398 i = drv->suspend_late(pci_dev, state);
399 suspend_report_result(drv->suspend_late, i);
404 static int pci_legacy_resume_early(struct device *dev)
406 struct pci_dev * pci_dev = to_pci_dev(dev);
407 struct pci_driver * drv = pci_dev->driver;
409 return drv && drv->resume_early ?
410 drv->resume_early(pci_dev) : 0;
413 static int pci_legacy_resume(struct device *dev)
415 struct pci_dev * pci_dev = to_pci_dev(dev);
416 struct pci_driver * drv = pci_dev->driver;
418 pci_fixup_device(pci_fixup_resume, pci_dev);
420 return drv && drv->resume ?
421 drv->resume(pci_dev) : pci_pm_reenable_device(pci_dev);
424 /* Auxiliary functions used by the new power management framework */
426 static void pci_pm_default_resume_noirq(struct pci_dev *pci_dev)
428 pci_restore_standard_config(pci_dev);
429 pci_dev->state_saved = false;
430 pci_fixup_device(pci_fixup_resume_early, pci_dev);
433 static int pci_pm_default_resume(struct pci_dev *pci_dev)
435 pci_fixup_device(pci_fixup_resume, pci_dev);
437 if (pci_is_bridge(pci_dev))
440 pci_enable_wake(pci_dev, PCI_D0, false);
441 return pci_pm_reenable_device(pci_dev);
444 static void pci_pm_default_suspend_generic(struct pci_dev *pci_dev)
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);
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.
453 pci_save_state(pci_dev);
456 static void pci_pm_default_suspend(struct pci_dev *pci_dev, bool prepare)
458 pci_pm_default_suspend_generic(pci_dev);
460 if (prepare && !pci_is_bridge(pci_dev))
461 pci_prepare_to_sleep(pci_dev);
463 pci_fixup_device(pci_fixup_suspend, pci_dev);
466 static bool pci_has_legacy_pm_support(struct pci_dev *pci_dev)
468 struct pci_driver *drv = pci_dev->driver;
469 bool ret = drv && (drv->suspend || drv->suspend_late || drv->resume
470 || drv->resume_early);
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.
477 WARN_ON(ret && drv->driver.pm);
482 /* New power management framework */
484 static int pci_pm_prepare(struct device *dev)
486 struct device_driver *drv = dev->driver;
489 if (drv && drv->pm && drv->pm->prepare)
490 error = drv->pm->prepare(dev);
495 static void pci_pm_complete(struct device *dev)
497 struct device_driver *drv = dev->driver;
499 if (drv && drv->pm && drv->pm->complete)
500 drv->pm->complete(dev);
503 #ifdef CONFIG_SUSPEND
505 static int pci_pm_suspend(struct device *dev)
507 struct pci_dev *pci_dev = to_pci_dev(dev);
508 struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
511 if (pci_has_legacy_pm_support(pci_dev))
512 return pci_legacy_suspend(dev, PMSG_SUSPEND);
514 if (pm && pm->suspend) {
515 error = pm->suspend(dev);
516 suspend_report_result(pm->suspend, error);
520 pci_pm_default_suspend(pci_dev, !!pm);
525 static int pci_pm_suspend_noirq(struct device *dev)
527 struct pci_dev *pci_dev = to_pci_dev(dev);
528 struct device_driver *drv = dev->driver;
531 if (pci_has_legacy_pm_support(pci_dev))
532 return pci_legacy_suspend_late(dev, PMSG_SUSPEND);
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);
540 pci_pm_set_unknown_state(pci_dev);
545 static int pci_pm_resume_noirq(struct device *dev)
547 struct pci_dev *pci_dev = to_pci_dev(dev);
548 struct device_driver *drv = dev->driver;
551 pci_pm_default_resume_noirq(pci_dev);
553 if (pci_has_legacy_pm_support(pci_dev))
554 return pci_legacy_resume_early(dev);
556 if (drv && drv->pm && drv->pm->resume_noirq)
557 error = drv->pm->resume_noirq(dev);
562 static int pci_pm_resume(struct device *dev)
564 struct pci_dev *pci_dev = to_pci_dev(dev);
565 struct device_driver *drv = dev->driver;
569 * This is necessary for the suspend error path in which resume is
570 * called without restoring the standard config registers of the device.
572 if (pci_dev->state_saved)
573 pci_restore_standard_config(pci_dev);
575 if (pci_has_legacy_pm_support(pci_dev))
576 return pci_legacy_resume(dev);
578 error = pci_pm_default_resume(pci_dev);
580 if (!error && drv && drv->pm && drv->pm->resume)
581 error = drv->pm->resume(dev);
586 #else /* !CONFIG_SUSPEND */
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
593 #endif /* !CONFIG_SUSPEND */
595 #ifdef CONFIG_HIBERNATION
597 static int pci_pm_freeze(struct device *dev)
599 struct pci_dev *pci_dev = to_pci_dev(dev);
600 struct device_driver *drv = dev->driver;
603 if (pci_has_legacy_pm_support(pci_dev))
604 return pci_legacy_suspend(dev, PMSG_FREEZE);
606 if (drv && drv->pm && drv->pm->freeze) {
607 error = drv->pm->freeze(dev);
608 suspend_report_result(drv->pm->freeze, error);
612 pci_pm_default_suspend_generic(pci_dev);
617 static int pci_pm_freeze_noirq(struct device *dev)
619 struct pci_dev *pci_dev = to_pci_dev(dev);
620 struct device_driver *drv = dev->driver;
623 if (pci_has_legacy_pm_support(pci_dev))
624 return pci_legacy_suspend_late(dev, PMSG_FREEZE);
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);
632 pci_pm_set_unknown_state(pci_dev);
637 static int pci_pm_thaw_noirq(struct device *dev)
639 struct pci_dev *pci_dev = to_pci_dev(dev);
640 struct device_driver *drv = dev->driver;
643 if (pci_has_legacy_pm_support(pci_dev))
644 return pci_legacy_resume_early(dev);
646 pci_update_current_state(pci_dev, PCI_D0);
648 if (drv && drv->pm && drv->pm->thaw_noirq)
649 error = drv->pm->thaw_noirq(dev);
654 static int pci_pm_thaw(struct device *dev)
656 struct pci_dev *pci_dev = to_pci_dev(dev);
657 struct device_driver *drv = dev->driver;
660 if (pci_has_legacy_pm_support(pci_dev))
661 return pci_legacy_resume(dev);
663 pci_pm_reenable_device(pci_dev);
665 if (drv && drv->pm && drv->pm->thaw)
666 error = drv->pm->thaw(dev);
671 static int pci_pm_poweroff(struct device *dev)
673 struct pci_dev *pci_dev = to_pci_dev(dev);
674 struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
677 if (pci_has_legacy_pm_support(pci_dev))
678 return pci_legacy_suspend(dev, PMSG_HIBERNATE);
680 if (pm && pm->poweroff) {
681 error = pm->poweroff(dev);
682 suspend_report_result(pm->poweroff, error);
686 pci_pm_default_suspend(pci_dev, !!pm);
691 static int pci_pm_poweroff_noirq(struct device *dev)
693 struct device_driver *drv = dev->driver;
696 if (pci_has_legacy_pm_support(to_pci_dev(dev)))
697 return pci_legacy_suspend_late(dev, PMSG_HIBERNATE);
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);
707 static int pci_pm_restore_noirq(struct device *dev)
709 struct pci_dev *pci_dev = to_pci_dev(dev);
710 struct device_driver *drv = dev->driver;
713 pci_pm_default_resume_noirq(pci_dev);
715 if (pci_has_legacy_pm_support(pci_dev))
716 return pci_legacy_resume_early(dev);
718 if (drv && drv->pm && drv->pm->restore_noirq)
719 error = drv->pm->restore_noirq(dev);
724 static int pci_pm_restore(struct device *dev)
726 struct pci_dev *pci_dev = to_pci_dev(dev);
727 struct device_driver *drv = dev->driver;
731 * This is necessary for the hibernation error path in which restore is
732 * called without restoring the standard config registers of the device.
734 if (pci_dev->state_saved)
735 pci_restore_standard_config(pci_dev);
737 if (pci_has_legacy_pm_support(pci_dev))
738 return pci_legacy_resume(dev);
740 error = pci_pm_default_resume(pci_dev);
742 if (!error && drv && drv->pm && drv->pm->restore)
743 error = drv->pm->restore(dev);
748 #else /* !CONFIG_HIBERNATION */
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
759 #endif /* !CONFIG_HIBERNATION */
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,
768 .poweroff = pci_pm_poweroff,
769 .restore = pci_pm_restore,
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,
778 #define PCI_PM_OPS_PTR (&pci_dev_pm_ops)
780 #else /* !CONFIG_PM_SLEEP */
782 #define PCI_PM_OPS_PTR NULL
784 #endif /* !CONFIG_PM_SLEEP */
787 * __pci_register_driver - register a new pci driver
788 * @drv: the driver structure to register
789 * @owner: owner module of drv
790 * @mod_name: module name string
792 * Adds the driver structure to the list of registered drivers.
793 * Returns a negative value on error, otherwise 0.
794 * If no error occurred, the driver remains registered even if
795 * no device was claimed during registration.
797 int __pci_register_driver(struct pci_driver *drv, struct module *owner,
798 const char *mod_name)
802 /* initialize common driver fields */
803 drv->driver.name = drv->name;
804 drv->driver.bus = &pci_bus_type;
805 drv->driver.owner = owner;
806 drv->driver.mod_name = mod_name;
808 spin_lock_init(&drv->dynids.lock);
809 INIT_LIST_HEAD(&drv->dynids.list);
811 /* register with core */
812 error = driver_register(&drv->driver);
816 error = pci_create_newid_file(drv);
818 driver_unregister(&drv->driver);
824 * pci_unregister_driver - unregister a pci driver
825 * @drv: the driver structure to unregister
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
834 pci_unregister_driver(struct pci_driver *drv)
836 pci_remove_newid_file(drv);
837 driver_unregister(&drv->driver);
838 pci_free_dynids(drv);
841 static struct pci_driver pci_compat_driver = {
846 * pci_dev_driver - get the pci_driver of a device
847 * @dev: the device to query
849 * Returns the appropriate pci_driver structure or %NULL if there is no
850 * registered driver for the device.
853 pci_dev_driver(const struct pci_dev *dev)
859 for(i=0; i<=PCI_ROM_RESOURCE; i++)
860 if (dev->resource[i].flags & IORESOURCE_BUSY)
861 return &pci_compat_driver;
867 * pci_bus_match - Tell if a PCI device structure has a matching PCI device id structure
868 * @dev: the PCI device structure to match against
869 * @drv: the device driver to search for matching PCI device id structures
871 * Used by a driver to check whether a PCI device present in the
872 * system is in its list of supported devices. Returns the matching
873 * pci_device_id structure or %NULL if there is no match.
875 static int pci_bus_match(struct device *dev, struct device_driver *drv)
877 struct pci_dev *pci_dev = to_pci_dev(dev);
878 struct pci_driver *pci_drv = to_pci_driver(drv);
879 const struct pci_device_id *found_id;
881 found_id = pci_match_device(pci_drv, pci_dev);
889 * pci_dev_get - increments the reference count of the pci device structure
890 * @dev: the device being referenced
892 * Each live reference to a device should be refcounted.
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.
898 * A pointer to the device with the incremented reference counter is returned.
900 struct pci_dev *pci_dev_get(struct pci_dev *dev)
903 get_device(&dev->dev);
908 * pci_dev_put - release a use of the pci device structure
909 * @dev: device that's been disconnected
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.
914 void pci_dev_put(struct pci_dev *dev)
917 put_device(&dev->dev);
920 #ifndef CONFIG_HOTPLUG
921 int pci_uevent(struct device *dev, struct kobj_uevent_env *env)
927 struct bus_type pci_bus_type = {
929 .match = pci_bus_match,
930 .uevent = pci_uevent,
931 .probe = pci_device_probe,
932 .remove = pci_device_remove,
933 .shutdown = pci_device_shutdown,
934 .dev_attrs = pci_dev_attrs,
935 .pm = PCI_PM_OPS_PTR,
938 static int __init pci_driver_init(void)
940 return bus_register(&pci_bus_type);
943 postcore_initcall(pci_driver_init);
945 EXPORT_SYMBOL(pci_match_id);
946 EXPORT_SYMBOL(__pci_register_driver);
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);