2 * $Id: pci.c,v 1.91 1999/01/21 13:34:01 davem Exp $
4 * PCI Bus Services, see include/linux/pci.h for further explanation.
6 * Copyright 1993 -- 1997 Drew Eckhardt, Frederic Potter,
9 * Copyright 1997 -- 2000 Martin Mares <mj@ucw.cz>
12 #include <linux/kernel.h>
13 #include <linux/delay.h>
14 #include <linux/init.h>
15 #include <linux/pci.h>
17 #include <linux/module.h>
18 #include <linux/spinlock.h>
19 #include <linux/string.h>
20 #include <linux/log2.h>
21 #include <asm/dma.h> /* isa_dma_bridge_buggy */
24 unsigned int pci_pm_d3_delay = 10;
26 #ifdef CONFIG_PCI_DOMAINS
27 int pci_domains_supported = 1;
30 #define DEFAULT_CARDBUS_IO_SIZE (256)
31 #define DEFAULT_CARDBUS_MEM_SIZE (64*1024*1024)
32 /* pci=cbmemsize=nnM,cbiosize=nn can override this */
33 unsigned long pci_cardbus_io_size = DEFAULT_CARDBUS_IO_SIZE;
34 unsigned long pci_cardbus_mem_size = DEFAULT_CARDBUS_MEM_SIZE;
37 * pci_bus_max_busnr - returns maximum PCI bus number of given bus' children
38 * @bus: pointer to PCI bus structure to search
40 * Given a PCI bus, returns the highest PCI bus number present in the set
41 * including the given PCI bus and its list of child PCI buses.
43 unsigned char pci_bus_max_busnr(struct pci_bus* bus)
45 struct list_head *tmp;
48 max = bus->subordinate;
49 list_for_each(tmp, &bus->children) {
50 n = pci_bus_max_busnr(pci_bus_b(tmp));
56 EXPORT_SYMBOL_GPL(pci_bus_max_busnr);
60 * pci_max_busnr - returns maximum PCI bus number
62 * Returns the highest PCI bus number present in the system global list of
65 unsigned char __devinit
68 struct pci_bus *bus = NULL;
72 while ((bus = pci_find_next_bus(bus)) != NULL) {
73 n = pci_bus_max_busnr(bus);
82 #define PCI_FIND_CAP_TTL 48
84 static int __pci_find_next_cap_ttl(struct pci_bus *bus, unsigned int devfn,
85 u8 pos, int cap, int *ttl)
90 pci_bus_read_config_byte(bus, devfn, pos, &pos);
94 pci_bus_read_config_byte(bus, devfn, pos + PCI_CAP_LIST_ID,
100 pos += PCI_CAP_LIST_NEXT;
105 static int __pci_find_next_cap(struct pci_bus *bus, unsigned int devfn,
108 int ttl = PCI_FIND_CAP_TTL;
110 return __pci_find_next_cap_ttl(bus, devfn, pos, cap, &ttl);
113 int pci_find_next_capability(struct pci_dev *dev, u8 pos, int cap)
115 return __pci_find_next_cap(dev->bus, dev->devfn,
116 pos + PCI_CAP_LIST_NEXT, cap);
118 EXPORT_SYMBOL_GPL(pci_find_next_capability);
120 static int __pci_bus_find_cap_start(struct pci_bus *bus,
121 unsigned int devfn, u8 hdr_type)
125 pci_bus_read_config_word(bus, devfn, PCI_STATUS, &status);
126 if (!(status & PCI_STATUS_CAP_LIST))
130 case PCI_HEADER_TYPE_NORMAL:
131 case PCI_HEADER_TYPE_BRIDGE:
132 return PCI_CAPABILITY_LIST;
133 case PCI_HEADER_TYPE_CARDBUS:
134 return PCI_CB_CAPABILITY_LIST;
143 * pci_find_capability - query for devices' capabilities
144 * @dev: PCI device to query
145 * @cap: capability code
147 * Tell if a device supports a given PCI capability.
148 * Returns the address of the requested capability structure within the
149 * device's PCI configuration space or 0 in case the device does not
150 * support it. Possible values for @cap:
152 * %PCI_CAP_ID_PM Power Management
153 * %PCI_CAP_ID_AGP Accelerated Graphics Port
154 * %PCI_CAP_ID_VPD Vital Product Data
155 * %PCI_CAP_ID_SLOTID Slot Identification
156 * %PCI_CAP_ID_MSI Message Signalled Interrupts
157 * %PCI_CAP_ID_CHSWP CompactPCI HotSwap
158 * %PCI_CAP_ID_PCIX PCI-X
159 * %PCI_CAP_ID_EXP PCI Express
161 int pci_find_capability(struct pci_dev *dev, int cap)
165 pos = __pci_bus_find_cap_start(dev->bus, dev->devfn, dev->hdr_type);
167 pos = __pci_find_next_cap(dev->bus, dev->devfn, pos, cap);
173 * pci_bus_find_capability - query for devices' capabilities
174 * @bus: the PCI bus to query
175 * @devfn: PCI device to query
176 * @cap: capability code
178 * Like pci_find_capability() but works for pci devices that do not have a
179 * pci_dev structure set up yet.
181 * Returns the address of the requested capability structure within the
182 * device's PCI configuration space or 0 in case the device does not
185 int pci_bus_find_capability(struct pci_bus *bus, unsigned int devfn, int cap)
190 pci_bus_read_config_byte(bus, devfn, PCI_HEADER_TYPE, &hdr_type);
192 pos = __pci_bus_find_cap_start(bus, devfn, hdr_type & 0x7f);
194 pos = __pci_find_next_cap(bus, devfn, pos, cap);
200 * pci_find_ext_capability - Find an extended capability
201 * @dev: PCI device to query
202 * @cap: capability code
204 * Returns the address of the requested extended capability structure
205 * within the device's PCI configuration space or 0 if the device does
206 * not support it. Possible values for @cap:
208 * %PCI_EXT_CAP_ID_ERR Advanced Error Reporting
209 * %PCI_EXT_CAP_ID_VC Virtual Channel
210 * %PCI_EXT_CAP_ID_DSN Device Serial Number
211 * %PCI_EXT_CAP_ID_PWR Power Budgeting
213 int pci_find_ext_capability(struct pci_dev *dev, int cap)
216 int ttl = 480; /* 3840 bytes, minimum 8 bytes per capability */
219 if (dev->cfg_size <= 256)
222 if (pci_read_config_dword(dev, pos, &header) != PCIBIOS_SUCCESSFUL)
226 * If we have no capabilities, this is indicated by cap ID,
227 * cap version and next pointer all being 0.
233 if (PCI_EXT_CAP_ID(header) == cap)
236 pos = PCI_EXT_CAP_NEXT(header);
240 if (pci_read_config_dword(dev, pos, &header) != PCIBIOS_SUCCESSFUL)
246 EXPORT_SYMBOL_GPL(pci_find_ext_capability);
248 static int __pci_find_next_ht_cap(struct pci_dev *dev, int pos, int ht_cap)
250 int rc, ttl = PCI_FIND_CAP_TTL;
253 if (ht_cap == HT_CAPTYPE_SLAVE || ht_cap == HT_CAPTYPE_HOST)
254 mask = HT_3BIT_CAP_MASK;
256 mask = HT_5BIT_CAP_MASK;
258 pos = __pci_find_next_cap_ttl(dev->bus, dev->devfn, pos,
259 PCI_CAP_ID_HT, &ttl);
261 rc = pci_read_config_byte(dev, pos + 3, &cap);
262 if (rc != PCIBIOS_SUCCESSFUL)
265 if ((cap & mask) == ht_cap)
268 pos = __pci_find_next_cap_ttl(dev->bus, dev->devfn,
269 pos + PCI_CAP_LIST_NEXT,
270 PCI_CAP_ID_HT, &ttl);
276 * pci_find_next_ht_capability - query a device's Hypertransport capabilities
277 * @dev: PCI device to query
278 * @pos: Position from which to continue searching
279 * @ht_cap: Hypertransport capability code
281 * To be used in conjunction with pci_find_ht_capability() to search for
282 * all capabilities matching @ht_cap. @pos should always be a value returned
283 * from pci_find_ht_capability().
285 * NB. To be 100% safe against broken PCI devices, the caller should take
286 * steps to avoid an infinite loop.
288 int pci_find_next_ht_capability(struct pci_dev *dev, int pos, int ht_cap)
290 return __pci_find_next_ht_cap(dev, pos + PCI_CAP_LIST_NEXT, ht_cap);
292 EXPORT_SYMBOL_GPL(pci_find_next_ht_capability);
295 * pci_find_ht_capability - query a device's Hypertransport capabilities
296 * @dev: PCI device to query
297 * @ht_cap: Hypertransport capability code
299 * Tell if a device supports a given Hypertransport capability.
300 * Returns an address within the device's PCI configuration space
301 * or 0 in case the device does not support the request capability.
302 * The address points to the PCI capability, of type PCI_CAP_ID_HT,
303 * which has a Hypertransport capability matching @ht_cap.
305 int pci_find_ht_capability(struct pci_dev *dev, int ht_cap)
309 pos = __pci_bus_find_cap_start(dev->bus, dev->devfn, dev->hdr_type);
311 pos = __pci_find_next_ht_cap(dev, pos, ht_cap);
315 EXPORT_SYMBOL_GPL(pci_find_ht_capability);
317 void pcie_wait_pending_transaction(struct pci_dev *dev)
322 pos = pci_find_capability(dev, PCI_CAP_ID_EXP);
326 pci_read_config_word(dev, pos + PCI_EXP_DEVSTA, ®16);
327 if (!(reg16 & PCI_EXP_DEVSTA_TRPND))
333 EXPORT_SYMBOL_GPL(pcie_wait_pending_transaction);
336 * pci_find_parent_resource - return resource region of parent bus of given region
337 * @dev: PCI device structure contains resources to be searched
338 * @res: child resource record for which parent is sought
340 * For given resource region of given device, return the resource
341 * region of parent bus the given region is contained in or where
342 * it should be allocated from.
345 pci_find_parent_resource(const struct pci_dev *dev, struct resource *res)
347 const struct pci_bus *bus = dev->bus;
349 struct resource *best = NULL;
351 for(i = 0; i < PCI_BUS_NUM_RESOURCES; i++) {
352 struct resource *r = bus->resource[i];
355 if (res->start && !(res->start >= r->start && res->end <= r->end))
356 continue; /* Not contained */
357 if ((res->flags ^ r->flags) & (IORESOURCE_IO | IORESOURCE_MEM))
358 continue; /* Wrong type */
359 if (!((res->flags ^ r->flags) & IORESOURCE_PREFETCH))
360 return r; /* Exact match */
361 if ((res->flags & IORESOURCE_PREFETCH) && !(r->flags & IORESOURCE_PREFETCH))
362 best = r; /* Approximating prefetchable by non-prefetchable */
368 * pci_restore_bars - restore a devices BAR values (e.g. after wake-up)
369 * @dev: PCI device to have its BARs restored
371 * Restore the BAR values for a given device, so as to make it
372 * accessible by its driver.
375 pci_restore_bars(struct pci_dev *dev)
379 switch (dev->hdr_type) {
380 case PCI_HEADER_TYPE_NORMAL:
383 case PCI_HEADER_TYPE_BRIDGE:
386 case PCI_HEADER_TYPE_CARDBUS:
390 /* Should never get here, but just in case... */
394 for (i = 0; i < numres; i ++)
395 pci_update_resource(dev, &dev->resource[i], i);
398 int (*platform_pci_set_power_state)(struct pci_dev *dev, pci_power_t t);
401 * pci_set_power_state - Set the power state of a PCI device
402 * @dev: PCI device to be suspended
403 * @state: PCI power state (D0, D1, D2, D3hot, D3cold) we're entering
405 * Transition a device to a new power state, using the Power Management
406 * Capabilities in the device's config space.
409 * -EINVAL if trying to enter a lower state than we're already in.
410 * 0 if we're already in the requested state.
411 * -EIO if device does not support PCI PM.
412 * 0 if we can successfully change the power state.
415 pci_set_power_state(struct pci_dev *dev, pci_power_t state)
417 int pm, need_restore = 0;
420 /* bound the state we're entering */
421 if (state > PCI_D3hot)
425 * If the device or the parent bridge can't support PCI PM, ignore
426 * the request if we're doing anything besides putting it into D0
427 * (which would only happen on boot).
429 if ((state == PCI_D1 || state == PCI_D2) && pci_no_d1d2(dev))
432 /* find PCI PM capability in list */
433 pm = pci_find_capability(dev, PCI_CAP_ID_PM);
435 /* abort if the device doesn't support PM capabilities */
439 /* Validate current state:
440 * Can enter D0 from any state, but if we can only go deeper
441 * to sleep if we're already in a low power state
443 if (state != PCI_D0 && dev->current_state > state) {
444 printk(KERN_ERR "%s(): %s: state=%d, current state=%d\n",
445 __FUNCTION__, pci_name(dev), state, dev->current_state);
447 } else if (dev->current_state == state)
448 return 0; /* we're already there */
451 pci_read_config_word(dev,pm + PCI_PM_PMC,&pmc);
452 if ((pmc & PCI_PM_CAP_VER_MASK) > 3) {
454 "PCI: %s has unsupported PM cap regs version (%u)\n",
455 pci_name(dev), pmc & PCI_PM_CAP_VER_MASK);
459 /* check if this device supports the desired state */
460 if (state == PCI_D1 && !(pmc & PCI_PM_CAP_D1))
462 else if (state == PCI_D2 && !(pmc & PCI_PM_CAP_D2))
465 pci_read_config_word(dev, pm + PCI_PM_CTRL, &pmcsr);
467 /* If we're (effectively) in D3, force entire word to 0.
468 * This doesn't affect PME_Status, disables PME_En, and
469 * sets PowerState to 0.
471 switch (dev->current_state) {
475 pmcsr &= ~PCI_PM_CTRL_STATE_MASK;
478 case PCI_UNKNOWN: /* Boot-up */
479 if ((pmcsr & PCI_PM_CTRL_STATE_MASK) == PCI_D3hot
480 && !(pmcsr & PCI_PM_CTRL_NO_SOFT_RESET))
482 /* Fall-through: force to D0 */
488 /* enter specified state */
489 pci_write_config_word(dev, pm + PCI_PM_CTRL, pmcsr);
491 /* Mandatory power management transition delays */
492 /* see PCI PM 1.1 5.6.1 table 18 */
493 if (state == PCI_D3hot || dev->current_state == PCI_D3hot)
494 msleep(pci_pm_d3_delay);
495 else if (state == PCI_D2 || dev->current_state == PCI_D2)
499 * Give firmware a chance to be called, such as ACPI _PRx, _PSx
500 * Firmware method after native method ?
502 if (platform_pci_set_power_state)
503 platform_pci_set_power_state(dev, state);
505 dev->current_state = state;
507 /* According to section 5.4.1 of the "PCI BUS POWER MANAGEMENT
508 * INTERFACE SPECIFICATION, REV. 1.2", a device transitioning
509 * from D3hot to D0 _may_ perform an internal reset, thereby
510 * going to "D0 Uninitialized" rather than "D0 Initialized".
511 * For example, at least some versions of the 3c905B and the
512 * 3c556B exhibit this behaviour.
514 * At least some laptop BIOSen (e.g. the Thinkpad T21) leave
515 * devices in a D3hot state at boot. Consequently, we need to
516 * restore at least the BARs so that the device will be
517 * accessible to its driver.
520 pci_restore_bars(dev);
525 pci_power_t (*platform_pci_choose_state)(struct pci_dev *dev, pm_message_t state);
528 * pci_choose_state - Choose the power state of a PCI device
529 * @dev: PCI device to be suspended
530 * @state: target sleep state for the whole system. This is the value
531 * that is passed to suspend() function.
533 * Returns PCI power state suitable for given device and given system
537 pci_power_t pci_choose_state(struct pci_dev *dev, pm_message_t state)
541 if (!pci_find_capability(dev, PCI_CAP_ID_PM))
544 if (platform_pci_choose_state) {
545 ret = platform_pci_choose_state(dev, state);
546 if (ret != PCI_POWER_ERROR)
550 switch (state.event) {
553 case PM_EVENT_FREEZE:
554 case PM_EVENT_PRETHAW:
555 /* REVISIT both freeze and pre-thaw "should" use D0 */
556 case PM_EVENT_SUSPEND:
557 case PM_EVENT_HIBERNATE:
560 printk("Unrecognized suspend event %d\n", state.event);
566 EXPORT_SYMBOL(pci_choose_state);
568 static int pci_save_pcie_state(struct pci_dev *dev)
571 struct pci_cap_saved_state *save_state;
575 pos = pci_find_capability(dev, PCI_CAP_ID_EXP);
579 save_state = pci_find_saved_cap(dev, PCI_CAP_ID_EXP);
581 save_state = kzalloc(sizeof(*save_state) + sizeof(u16) * 4, GFP_KERNEL);
585 dev_err(&dev->dev, "Out of memory in pci_save_pcie_state\n");
588 cap = (u16 *)&save_state->data[0];
590 pci_read_config_word(dev, pos + PCI_EXP_DEVCTL, &cap[i++]);
591 pci_read_config_word(dev, pos + PCI_EXP_LNKCTL, &cap[i++]);
592 pci_read_config_word(dev, pos + PCI_EXP_SLTCTL, &cap[i++]);
593 pci_read_config_word(dev, pos + PCI_EXP_RTCTL, &cap[i++]);
594 save_state->cap_nr = PCI_CAP_ID_EXP;
596 pci_add_saved_cap(dev, save_state);
600 static void pci_restore_pcie_state(struct pci_dev *dev)
603 struct pci_cap_saved_state *save_state;
606 save_state = pci_find_saved_cap(dev, PCI_CAP_ID_EXP);
607 pos = pci_find_capability(dev, PCI_CAP_ID_EXP);
608 if (!save_state || pos <= 0)
610 cap = (u16 *)&save_state->data[0];
612 pci_write_config_word(dev, pos + PCI_EXP_DEVCTL, cap[i++]);
613 pci_write_config_word(dev, pos + PCI_EXP_LNKCTL, cap[i++]);
614 pci_write_config_word(dev, pos + PCI_EXP_SLTCTL, cap[i++]);
615 pci_write_config_word(dev, pos + PCI_EXP_RTCTL, cap[i++]);
619 static int pci_save_pcix_state(struct pci_dev *dev)
622 struct pci_cap_saved_state *save_state;
626 pos = pci_find_capability(dev, PCI_CAP_ID_PCIX);
630 save_state = pci_find_saved_cap(dev, PCI_CAP_ID_PCIX);
632 save_state = kzalloc(sizeof(*save_state) + sizeof(u16), GFP_KERNEL);
636 dev_err(&dev->dev, "Out of memory in pci_save_pcie_state\n");
639 cap = (u16 *)&save_state->data[0];
641 pci_read_config_word(dev, pos + PCI_X_CMD, &cap[i++]);
642 save_state->cap_nr = PCI_CAP_ID_PCIX;
644 pci_add_saved_cap(dev, save_state);
648 static void pci_restore_pcix_state(struct pci_dev *dev)
651 struct pci_cap_saved_state *save_state;
654 save_state = pci_find_saved_cap(dev, PCI_CAP_ID_PCIX);
655 pos = pci_find_capability(dev, PCI_CAP_ID_PCIX);
656 if (!save_state || pos <= 0)
658 cap = (u16 *)&save_state->data[0];
660 pci_write_config_word(dev, pos + PCI_X_CMD, cap[i++]);
665 * pci_save_state - save the PCI configuration space of a device before suspending
666 * @dev: - PCI device that we're dealing with
669 pci_save_state(struct pci_dev *dev)
672 /* XXX: 100% dword access ok here? */
673 for (i = 0; i < 16; i++)
674 pci_read_config_dword(dev, i * 4,&dev->saved_config_space[i]);
675 if ((i = pci_save_pcie_state(dev)) != 0)
677 if ((i = pci_save_pcix_state(dev)) != 0)
683 * pci_restore_state - Restore the saved state of a PCI device
684 * @dev: - PCI device that we're dealing with
687 pci_restore_state(struct pci_dev *dev)
692 /* PCI Express register must be restored first */
693 pci_restore_pcie_state(dev);
696 * The Base Address register should be programmed before the command
699 for (i = 15; i >= 0; i--) {
700 pci_read_config_dword(dev, i * 4, &val);
701 if (val != dev->saved_config_space[i]) {
702 printk(KERN_DEBUG "PM: Writing back config space on "
703 "device %s at offset %x (was %x, writing %x)\n",
705 val, (int)dev->saved_config_space[i]);
706 pci_write_config_dword(dev,i * 4,
707 dev->saved_config_space[i]);
710 pci_restore_pcix_state(dev);
711 pci_restore_msi_state(dev);
716 static int do_pci_enable_device(struct pci_dev *dev, int bars)
720 err = pci_set_power_state(dev, PCI_D0);
721 if (err < 0 && err != -EIO)
723 err = pcibios_enable_device(dev, bars);
726 pci_fixup_device(pci_fixup_enable, dev);
732 * pci_reenable_device - Resume abandoned device
733 * @dev: PCI device to be resumed
735 * Note this function is a backend of pci_default_resume and is not supposed
736 * to be called by normal code, write proper resume handler and use it instead.
738 int pci_reenable_device(struct pci_dev *dev)
740 if (atomic_read(&dev->enable_cnt))
741 return do_pci_enable_device(dev, (1 << PCI_NUM_RESOURCES) - 1);
745 static int __pci_enable_device_flags(struct pci_dev *dev,
746 resource_size_t flags)
751 if (atomic_add_return(1, &dev->enable_cnt) > 1)
752 return 0; /* already enabled */
754 for (i = 0; i < DEVICE_COUNT_RESOURCE; i++)
755 if (dev->resource[i].flags & flags)
758 err = do_pci_enable_device(dev, bars);
760 atomic_dec(&dev->enable_cnt);
765 * pci_enable_device_io - Initialize a device for use with IO space
766 * @dev: PCI device to be initialized
768 * Initialize device before it's used by a driver. Ask low-level code
769 * to enable I/O resources. Wake up the device if it was suspended.
770 * Beware, this function can fail.
772 int pci_enable_device_io(struct pci_dev *dev)
774 return __pci_enable_device_flags(dev, IORESOURCE_IO);
778 * pci_enable_device_mem - Initialize a device for use with Memory space
779 * @dev: PCI device to be initialized
781 * Initialize device before it's used by a driver. Ask low-level code
782 * to enable Memory resources. Wake up the device if it was suspended.
783 * Beware, this function can fail.
785 int pci_enable_device_mem(struct pci_dev *dev)
787 return __pci_enable_device_flags(dev, IORESOURCE_MEM);
791 * pci_enable_device - Initialize device before it's used by a driver.
792 * @dev: PCI device to be initialized
794 * Initialize device before it's used by a driver. Ask low-level code
795 * to enable I/O and memory. Wake up the device if it was suspended.
796 * Beware, this function can fail.
798 * Note we don't actually enable the device many times if we call
799 * this function repeatedly (we just increment the count).
801 int pci_enable_device(struct pci_dev *dev)
803 return __pci_enable_device_flags(dev, IORESOURCE_MEM | IORESOURCE_IO);
807 * Managed PCI resources. This manages device on/off, intx/msi/msix
808 * on/off and BAR regions. pci_dev itself records msi/msix status, so
809 * there's no need to track it separately. pci_devres is initialized
810 * when a device is enabled using managed PCI device enable interface.
813 unsigned int enabled:1;
814 unsigned int pinned:1;
815 unsigned int orig_intx:1;
816 unsigned int restore_intx:1;
820 static void pcim_release(struct device *gendev, void *res)
822 struct pci_dev *dev = container_of(gendev, struct pci_dev, dev);
823 struct pci_devres *this = res;
826 if (dev->msi_enabled)
827 pci_disable_msi(dev);
828 if (dev->msix_enabled)
829 pci_disable_msix(dev);
831 for (i = 0; i < DEVICE_COUNT_RESOURCE; i++)
832 if (this->region_mask & (1 << i))
833 pci_release_region(dev, i);
835 if (this->restore_intx)
836 pci_intx(dev, this->orig_intx);
838 if (this->enabled && !this->pinned)
839 pci_disable_device(dev);
842 static struct pci_devres * get_pci_dr(struct pci_dev *pdev)
844 struct pci_devres *dr, *new_dr;
846 dr = devres_find(&pdev->dev, pcim_release, NULL, NULL);
850 new_dr = devres_alloc(pcim_release, sizeof(*new_dr), GFP_KERNEL);
853 return devres_get(&pdev->dev, new_dr, NULL, NULL);
856 static struct pci_devres * find_pci_dr(struct pci_dev *pdev)
858 if (pci_is_managed(pdev))
859 return devres_find(&pdev->dev, pcim_release, NULL, NULL);
864 * pcim_enable_device - Managed pci_enable_device()
865 * @pdev: PCI device to be initialized
867 * Managed pci_enable_device().
869 int pcim_enable_device(struct pci_dev *pdev)
871 struct pci_devres *dr;
874 dr = get_pci_dr(pdev);
880 rc = pci_enable_device(pdev);
882 pdev->is_managed = 1;
889 * pcim_pin_device - Pin managed PCI device
890 * @pdev: PCI device to pin
892 * Pin managed PCI device @pdev. Pinned device won't be disabled on
893 * driver detach. @pdev must have been enabled with
894 * pcim_enable_device().
896 void pcim_pin_device(struct pci_dev *pdev)
898 struct pci_devres *dr;
900 dr = find_pci_dr(pdev);
901 WARN_ON(!dr || !dr->enabled);
907 * pcibios_disable_device - disable arch specific PCI resources for device dev
908 * @dev: the PCI device to disable
910 * Disables architecture specific PCI resources for the device. This
911 * is the default implementation. Architecture implementations can
914 void __attribute__ ((weak)) pcibios_disable_device (struct pci_dev *dev) {}
917 * pci_disable_device - Disable PCI device after use
918 * @dev: PCI device to be disabled
920 * Signal to the system that the PCI device is not in use by the system
921 * anymore. This only involves disabling PCI bus-mastering, if active.
923 * Note we don't actually disable the device until all callers of
924 * pci_device_enable() have called pci_device_disable().
927 pci_disable_device(struct pci_dev *dev)
929 struct pci_devres *dr;
932 dr = find_pci_dr(dev);
936 if (atomic_sub_return(1, &dev->enable_cnt) != 0)
939 /* Wait for all transactions are finished before disabling the device */
940 pcie_wait_pending_transaction(dev);
942 pci_read_config_word(dev, PCI_COMMAND, &pci_command);
943 if (pci_command & PCI_COMMAND_MASTER) {
944 pci_command &= ~PCI_COMMAND_MASTER;
945 pci_write_config_word(dev, PCI_COMMAND, pci_command);
947 dev->is_busmaster = 0;
949 pcibios_disable_device(dev);
953 * pcibios_set_pcie_reset_state - set reset state for device dev
954 * @dev: the PCI-E device reset
955 * @state: Reset state to enter into
958 * Sets the PCI-E reset state for the device. This is the default
959 * implementation. Architecture implementations can override this.
961 int __attribute__ ((weak)) pcibios_set_pcie_reset_state(struct pci_dev *dev,
962 enum pcie_reset_state state)
968 * pci_set_pcie_reset_state - set reset state for device dev
969 * @dev: the PCI-E device reset
970 * @state: Reset state to enter into
973 * Sets the PCI reset state for the device.
975 int pci_set_pcie_reset_state(struct pci_dev *dev, enum pcie_reset_state state)
977 return pcibios_set_pcie_reset_state(dev, state);
981 * pci_enable_wake - enable PCI device as wakeup event source
982 * @dev: PCI device affected
983 * @state: PCI state from which device will issue wakeup events
984 * @enable: True to enable event generation; false to disable
986 * This enables the device as a wakeup event source, or disables it.
987 * When such events involves platform-specific hooks, those hooks are
988 * called automatically by this routine.
990 * Devices with legacy power management (no standard PCI PM capabilities)
991 * always require such platform hooks. Depending on the platform, devices
992 * supporting the standard PCI PME# signal may require such platform hooks;
993 * they always update bits in config space to allow PME# generation.
995 * -EIO is returned if the device can't ever be a wakeup event source.
996 * -EINVAL is returned if the device can't generate wakeup events from
997 * the specified PCI state. Returns zero if the operation is successful.
999 int pci_enable_wake(struct pci_dev *dev, pci_power_t state, int enable)
1005 /* Note that drivers should verify device_may_wakeup(&dev->dev)
1006 * before calling this function. Platform code should report
1007 * errors when drivers try to enable wakeup on devices that
1008 * can't issue wakeups, or on which wakeups were disabled by
1009 * userspace updating the /sys/devices.../power/wakeup file.
1012 status = call_platform_enable_wakeup(&dev->dev, enable);
1014 /* find PCI PM capability in list */
1015 pm = pci_find_capability(dev, PCI_CAP_ID_PM);
1017 /* If device doesn't support PM Capabilities, but caller wants to
1018 * disable wake events, it's a NOP. Otherwise fail unless the
1019 * platform hooks handled this legacy device already.
1022 return enable ? status : 0;
1024 /* Check device's ability to generate PME# */
1025 pci_read_config_word(dev,pm+PCI_PM_PMC,&value);
1027 value &= PCI_PM_CAP_PME_MASK;
1028 value >>= ffs(PCI_PM_CAP_PME_MASK) - 1; /* First bit of mask */
1030 /* Check if it can generate PME# from requested state. */
1031 if (!value || !(value & (1 << state))) {
1032 /* if it can't, revert what the platform hook changed,
1033 * always reporting the base "EINVAL, can't PME#" error
1036 call_platform_enable_wakeup(&dev->dev, 0);
1037 return enable ? -EINVAL : 0;
1040 pci_read_config_word(dev, pm + PCI_PM_CTRL, &value);
1042 /* Clear PME_Status by writing 1 to it and enable PME# */
1043 value |= PCI_PM_CTRL_PME_STATUS | PCI_PM_CTRL_PME_ENABLE;
1046 value &= ~PCI_PM_CTRL_PME_ENABLE;
1048 pci_write_config_word(dev, pm + PCI_PM_CTRL, value);
1054 pci_get_interrupt_pin(struct pci_dev *dev, struct pci_dev **bridge)
1062 while (dev->bus->self) {
1063 pin = (pin + PCI_SLOT(dev->devfn)) % 4;
1064 dev = dev->bus->self;
1071 * pci_release_region - Release a PCI bar
1072 * @pdev: PCI device whose resources were previously reserved by pci_request_region
1073 * @bar: BAR to release
1075 * Releases the PCI I/O and memory resources previously reserved by a
1076 * successful call to pci_request_region. Call this function only
1077 * after all use of the PCI regions has ceased.
1079 void pci_release_region(struct pci_dev *pdev, int bar)
1081 struct pci_devres *dr;
1083 if (pci_resource_len(pdev, bar) == 0)
1085 if (pci_resource_flags(pdev, bar) & IORESOURCE_IO)
1086 release_region(pci_resource_start(pdev, bar),
1087 pci_resource_len(pdev, bar));
1088 else if (pci_resource_flags(pdev, bar) & IORESOURCE_MEM)
1089 release_mem_region(pci_resource_start(pdev, bar),
1090 pci_resource_len(pdev, bar));
1092 dr = find_pci_dr(pdev);
1094 dr->region_mask &= ~(1 << bar);
1098 * pci_request_region - Reserved PCI I/O and memory resource
1099 * @pdev: PCI device whose resources are to be reserved
1100 * @bar: BAR to be reserved
1101 * @res_name: Name to be associated with resource.
1103 * Mark the PCI region associated with PCI device @pdev BR @bar as
1104 * being reserved by owner @res_name. Do not access any
1105 * address inside the PCI regions unless this call returns
1108 * Returns 0 on success, or %EBUSY on error. A warning
1109 * message is also printed on failure.
1111 int pci_request_region(struct pci_dev *pdev, int bar, const char *res_name)
1113 struct pci_devres *dr;
1115 if (pci_resource_len(pdev, bar) == 0)
1118 if (pci_resource_flags(pdev, bar) & IORESOURCE_IO) {
1119 if (!request_region(pci_resource_start(pdev, bar),
1120 pci_resource_len(pdev, bar), res_name))
1123 else if (pci_resource_flags(pdev, bar) & IORESOURCE_MEM) {
1124 if (!request_mem_region(pci_resource_start(pdev, bar),
1125 pci_resource_len(pdev, bar), res_name))
1129 dr = find_pci_dr(pdev);
1131 dr->region_mask |= 1 << bar;
1136 printk (KERN_WARNING "PCI: Unable to reserve %s region #%d:%llx@%llx "
1138 pci_resource_flags(pdev, bar) & IORESOURCE_IO ? "I/O" : "mem",
1139 bar + 1, /* PCI BAR # */
1140 (unsigned long long)pci_resource_len(pdev, bar),
1141 (unsigned long long)pci_resource_start(pdev, bar),
1147 * pci_release_selected_regions - Release selected PCI I/O and memory resources
1148 * @pdev: PCI device whose resources were previously reserved
1149 * @bars: Bitmask of BARs to be released
1151 * Release selected PCI I/O and memory resources previously reserved.
1152 * Call this function only after all use of the PCI regions has ceased.
1154 void pci_release_selected_regions(struct pci_dev *pdev, int bars)
1158 for (i = 0; i < 6; i++)
1159 if (bars & (1 << i))
1160 pci_release_region(pdev, i);
1164 * pci_request_selected_regions - Reserve selected PCI I/O and memory resources
1165 * @pdev: PCI device whose resources are to be reserved
1166 * @bars: Bitmask of BARs to be requested
1167 * @res_name: Name to be associated with resource
1169 int pci_request_selected_regions(struct pci_dev *pdev, int bars,
1170 const char *res_name)
1174 for (i = 0; i < 6; i++)
1175 if (bars & (1 << i))
1176 if(pci_request_region(pdev, i, res_name))
1182 if (bars & (1 << i))
1183 pci_release_region(pdev, i);
1189 * pci_release_regions - Release reserved PCI I/O and memory resources
1190 * @pdev: PCI device whose resources were previously reserved by pci_request_regions
1192 * Releases all PCI I/O and memory resources previously reserved by a
1193 * successful call to pci_request_regions. Call this function only
1194 * after all use of the PCI regions has ceased.
1197 void pci_release_regions(struct pci_dev *pdev)
1199 pci_release_selected_regions(pdev, (1 << 6) - 1);
1203 * pci_request_regions - Reserved PCI I/O and memory resources
1204 * @pdev: PCI device whose resources are to be reserved
1205 * @res_name: Name to be associated with resource.
1207 * Mark all PCI regions associated with PCI device @pdev as
1208 * being reserved by owner @res_name. Do not access any
1209 * address inside the PCI regions unless this call returns
1212 * Returns 0 on success, or %EBUSY on error. A warning
1213 * message is also printed on failure.
1215 int pci_request_regions(struct pci_dev *pdev, const char *res_name)
1217 return pci_request_selected_regions(pdev, ((1 << 6) - 1), res_name);
1221 * pci_set_master - enables bus-mastering for device dev
1222 * @dev: the PCI device to enable
1224 * Enables bus-mastering on the device and calls pcibios_set_master()
1225 * to do the needed arch specific settings.
1228 pci_set_master(struct pci_dev *dev)
1232 pci_read_config_word(dev, PCI_COMMAND, &cmd);
1233 if (! (cmd & PCI_COMMAND_MASTER)) {
1234 pr_debug("PCI: Enabling bus mastering for device %s\n", pci_name(dev));
1235 cmd |= PCI_COMMAND_MASTER;
1236 pci_write_config_word(dev, PCI_COMMAND, cmd);
1238 dev->is_busmaster = 1;
1239 pcibios_set_master(dev);
1242 #ifdef PCI_DISABLE_MWI
1243 int pci_set_mwi(struct pci_dev *dev)
1248 int pci_try_set_mwi(struct pci_dev *dev)
1253 void pci_clear_mwi(struct pci_dev *dev)
1259 #ifndef PCI_CACHE_LINE_BYTES
1260 #define PCI_CACHE_LINE_BYTES L1_CACHE_BYTES
1263 /* This can be overridden by arch code. */
1264 /* Don't forget this is measured in 32-bit words, not bytes */
1265 u8 pci_cache_line_size = PCI_CACHE_LINE_BYTES / 4;
1268 * pci_set_cacheline_size - ensure the CACHE_LINE_SIZE register is programmed
1269 * @dev: the PCI device for which MWI is to be enabled
1271 * Helper function for pci_set_mwi.
1272 * Originally copied from drivers/net/acenic.c.
1273 * Copyright 1998-2001 by Jes Sorensen, <jes@trained-monkey.org>.
1275 * RETURNS: An appropriate -ERRNO error value on error, or zero for success.
1278 pci_set_cacheline_size(struct pci_dev *dev)
1282 if (!pci_cache_line_size)
1283 return -EINVAL; /* The system doesn't support MWI. */
1285 /* Validate current setting: the PCI_CACHE_LINE_SIZE must be
1286 equal to or multiple of the right value. */
1287 pci_read_config_byte(dev, PCI_CACHE_LINE_SIZE, &cacheline_size);
1288 if (cacheline_size >= pci_cache_line_size &&
1289 (cacheline_size % pci_cache_line_size) == 0)
1292 /* Write the correct value. */
1293 pci_write_config_byte(dev, PCI_CACHE_LINE_SIZE, pci_cache_line_size);
1295 pci_read_config_byte(dev, PCI_CACHE_LINE_SIZE, &cacheline_size);
1296 if (cacheline_size == pci_cache_line_size)
1299 printk(KERN_DEBUG "PCI: cache line size of %d is not supported "
1300 "by device %s\n", pci_cache_line_size << 2, pci_name(dev));
1306 * pci_set_mwi - enables memory-write-invalidate PCI transaction
1307 * @dev: the PCI device for which MWI is enabled
1309 * Enables the Memory-Write-Invalidate transaction in %PCI_COMMAND.
1311 * RETURNS: An appropriate -ERRNO error value on error, or zero for success.
1314 pci_set_mwi(struct pci_dev *dev)
1319 rc = pci_set_cacheline_size(dev);
1323 pci_read_config_word(dev, PCI_COMMAND, &cmd);
1324 if (! (cmd & PCI_COMMAND_INVALIDATE)) {
1325 pr_debug("PCI: Enabling Mem-Wr-Inval for device %s\n",
1327 cmd |= PCI_COMMAND_INVALIDATE;
1328 pci_write_config_word(dev, PCI_COMMAND, cmd);
1335 * pci_try_set_mwi - enables memory-write-invalidate PCI transaction
1336 * @dev: the PCI device for which MWI is enabled
1338 * Enables the Memory-Write-Invalidate transaction in %PCI_COMMAND.
1339 * Callers are not required to check the return value.
1341 * RETURNS: An appropriate -ERRNO error value on error, or zero for success.
1343 int pci_try_set_mwi(struct pci_dev *dev)
1345 int rc = pci_set_mwi(dev);
1350 * pci_clear_mwi - disables Memory-Write-Invalidate for device dev
1351 * @dev: the PCI device to disable
1353 * Disables PCI Memory-Write-Invalidate transaction on the device
1356 pci_clear_mwi(struct pci_dev *dev)
1360 pci_read_config_word(dev, PCI_COMMAND, &cmd);
1361 if (cmd & PCI_COMMAND_INVALIDATE) {
1362 cmd &= ~PCI_COMMAND_INVALIDATE;
1363 pci_write_config_word(dev, PCI_COMMAND, cmd);
1366 #endif /* ! PCI_DISABLE_MWI */
1369 * pci_intx - enables/disables PCI INTx for device dev
1370 * @pdev: the PCI device to operate on
1371 * @enable: boolean: whether to enable or disable PCI INTx
1373 * Enables/disables PCI INTx for device dev
1376 pci_intx(struct pci_dev *pdev, int enable)
1378 u16 pci_command, new;
1380 pci_read_config_word(pdev, PCI_COMMAND, &pci_command);
1383 new = pci_command & ~PCI_COMMAND_INTX_DISABLE;
1385 new = pci_command | PCI_COMMAND_INTX_DISABLE;
1388 if (new != pci_command) {
1389 struct pci_devres *dr;
1391 pci_write_config_word(pdev, PCI_COMMAND, new);
1393 dr = find_pci_dr(pdev);
1394 if (dr && !dr->restore_intx) {
1395 dr->restore_intx = 1;
1396 dr->orig_intx = !enable;
1402 * pci_msi_off - disables any msi or msix capabilities
1403 * @dev: the PCI device to operate on
1405 * If you want to use msi see pci_enable_msi and friends.
1406 * This is a lower level primitive that allows us to disable
1407 * msi operation at the device level.
1409 void pci_msi_off(struct pci_dev *dev)
1414 pos = pci_find_capability(dev, PCI_CAP_ID_MSI);
1416 pci_read_config_word(dev, pos + PCI_MSI_FLAGS, &control);
1417 control &= ~PCI_MSI_FLAGS_ENABLE;
1418 pci_write_config_word(dev, pos + PCI_MSI_FLAGS, control);
1420 pos = pci_find_capability(dev, PCI_CAP_ID_MSIX);
1422 pci_read_config_word(dev, pos + PCI_MSIX_FLAGS, &control);
1423 control &= ~PCI_MSIX_FLAGS_ENABLE;
1424 pci_write_config_word(dev, pos + PCI_MSIX_FLAGS, control);
1428 #ifndef HAVE_ARCH_PCI_SET_DMA_MASK
1430 * These can be overridden by arch-specific implementations
1433 pci_set_dma_mask(struct pci_dev *dev, u64 mask)
1435 if (!pci_dma_supported(dev, mask))
1438 dev->dma_mask = mask;
1444 pci_set_consistent_dma_mask(struct pci_dev *dev, u64 mask)
1446 if (!pci_dma_supported(dev, mask))
1449 dev->dev.coherent_dma_mask = mask;
1455 #ifndef HAVE_ARCH_PCI_SET_DMA_MAX_SEGMENT_SIZE
1456 int pci_set_dma_max_seg_size(struct pci_dev *dev, unsigned int size)
1458 return dma_set_max_seg_size(&dev->dev, size);
1460 EXPORT_SYMBOL(pci_set_dma_max_seg_size);
1463 #ifndef HAVE_ARCH_PCI_SET_DMA_SEGMENT_BOUNDARY
1464 int pci_set_dma_seg_boundary(struct pci_dev *dev, unsigned long mask)
1466 return dma_set_seg_boundary(&dev->dev, mask);
1468 EXPORT_SYMBOL(pci_set_dma_seg_boundary);
1472 * pcix_get_max_mmrbc - get PCI-X maximum designed memory read byte count
1473 * @dev: PCI device to query
1475 * Returns mmrbc: maximum designed memory read count in bytes
1476 * or appropriate error value.
1478 int pcix_get_max_mmrbc(struct pci_dev *dev)
1483 cap = pci_find_capability(dev, PCI_CAP_ID_PCIX);
1487 err = pci_read_config_dword(dev, cap + PCI_X_STATUS, &stat);
1491 return (stat & PCI_X_STATUS_MAX_READ) >> 12;
1493 EXPORT_SYMBOL(pcix_get_max_mmrbc);
1496 * pcix_get_mmrbc - get PCI-X maximum memory read byte count
1497 * @dev: PCI device to query
1499 * Returns mmrbc: maximum memory read count in bytes
1500 * or appropriate error value.
1502 int pcix_get_mmrbc(struct pci_dev *dev)
1507 cap = pci_find_capability(dev, PCI_CAP_ID_PCIX);
1511 ret = pci_read_config_dword(dev, cap + PCI_X_CMD, &cmd);
1513 ret = 512 << ((cmd & PCI_X_CMD_MAX_READ) >> 2);
1517 EXPORT_SYMBOL(pcix_get_mmrbc);
1520 * pcix_set_mmrbc - set PCI-X maximum memory read byte count
1521 * @dev: PCI device to query
1522 * @mmrbc: maximum memory read count in bytes
1523 * valid values are 512, 1024, 2048, 4096
1525 * If possible sets maximum memory read byte count, some bridges have erratas
1526 * that prevent this.
1528 int pcix_set_mmrbc(struct pci_dev *dev, int mmrbc)
1530 int cap, err = -EINVAL;
1531 u32 stat, cmd, v, o;
1533 if (mmrbc < 512 || mmrbc > 4096 || !is_power_of_2(mmrbc))
1536 v = ffs(mmrbc) - 10;
1538 cap = pci_find_capability(dev, PCI_CAP_ID_PCIX);
1542 err = pci_read_config_dword(dev, cap + PCI_X_STATUS, &stat);
1546 if (v > (stat & PCI_X_STATUS_MAX_READ) >> 21)
1549 err = pci_read_config_dword(dev, cap + PCI_X_CMD, &cmd);
1553 o = (cmd & PCI_X_CMD_MAX_READ) >> 2;
1555 if (v > o && dev->bus &&
1556 (dev->bus->bus_flags & PCI_BUS_FLAGS_NO_MMRBC))
1559 cmd &= ~PCI_X_CMD_MAX_READ;
1561 err = pci_write_config_dword(dev, cap + PCI_X_CMD, cmd);
1566 EXPORT_SYMBOL(pcix_set_mmrbc);
1569 * pcie_get_readrq - get PCI Express read request size
1570 * @dev: PCI device to query
1572 * Returns maximum memory read request in bytes
1573 * or appropriate error value.
1575 int pcie_get_readrq(struct pci_dev *dev)
1580 cap = pci_find_capability(dev, PCI_CAP_ID_EXP);
1584 ret = pci_read_config_word(dev, cap + PCI_EXP_DEVCTL, &ctl);
1586 ret = 128 << ((ctl & PCI_EXP_DEVCTL_READRQ) >> 12);
1590 EXPORT_SYMBOL(pcie_get_readrq);
1593 * pcie_set_readrq - set PCI Express maximum memory read request
1594 * @dev: PCI device to query
1595 * @rq: maximum memory read count in bytes
1596 * valid values are 128, 256, 512, 1024, 2048, 4096
1598 * If possible sets maximum read byte count
1600 int pcie_set_readrq(struct pci_dev *dev, int rq)
1602 int cap, err = -EINVAL;
1605 if (rq < 128 || rq > 4096 || !is_power_of_2(rq))
1608 v = (ffs(rq) - 8) << 12;
1610 cap = pci_find_capability(dev, PCI_CAP_ID_EXP);
1614 err = pci_read_config_word(dev, cap + PCI_EXP_DEVCTL, &ctl);
1618 if ((ctl & PCI_EXP_DEVCTL_READRQ) != v) {
1619 ctl &= ~PCI_EXP_DEVCTL_READRQ;
1621 err = pci_write_config_dword(dev, cap + PCI_EXP_DEVCTL, ctl);
1627 EXPORT_SYMBOL(pcie_set_readrq);
1630 * pci_select_bars - Make BAR mask from the type of resource
1631 * @dev: the PCI device for which BAR mask is made
1632 * @flags: resource type mask to be selected
1634 * This helper routine makes bar mask from the type of resource.
1636 int pci_select_bars(struct pci_dev *dev, unsigned long flags)
1639 for (i = 0; i < PCI_NUM_RESOURCES; i++)
1640 if (pci_resource_flags(dev, i) & flags)
1645 static void __devinit pci_no_domains(void)
1647 #ifdef CONFIG_PCI_DOMAINS
1648 pci_domains_supported = 0;
1652 static int __devinit pci_init(void)
1654 struct pci_dev *dev = NULL;
1656 while ((dev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, dev)) != NULL) {
1657 pci_fixup_device(pci_fixup_final, dev);
1662 static int __devinit pci_setup(char *str)
1665 char *k = strchr(str, ',');
1668 if (*str && (str = pcibios_setup(str)) && *str) {
1669 if (!strcmp(str, "nomsi")) {
1671 } else if (!strcmp(str, "noaer")) {
1673 } else if (!strcmp(str, "nodomains")) {
1675 } else if (!strncmp(str, "cbiosize=", 9)) {
1676 pci_cardbus_io_size = memparse(str + 9, &str);
1677 } else if (!strncmp(str, "cbmemsize=", 10)) {
1678 pci_cardbus_mem_size = memparse(str + 10, &str);
1680 printk(KERN_ERR "PCI: Unknown option `%s'\n",
1688 early_param("pci", pci_setup);
1690 device_initcall(pci_init);
1692 EXPORT_SYMBOL(pci_reenable_device);
1693 EXPORT_SYMBOL(pci_enable_device_io);
1694 EXPORT_SYMBOL(pci_enable_device_mem);
1695 EXPORT_SYMBOL(pci_enable_device);
1696 EXPORT_SYMBOL(pcim_enable_device);
1697 EXPORT_SYMBOL(pcim_pin_device);
1698 EXPORT_SYMBOL(pci_disable_device);
1699 EXPORT_SYMBOL(pci_find_capability);
1700 EXPORT_SYMBOL(pci_bus_find_capability);
1701 EXPORT_SYMBOL(pci_release_regions);
1702 EXPORT_SYMBOL(pci_request_regions);
1703 EXPORT_SYMBOL(pci_release_region);
1704 EXPORT_SYMBOL(pci_request_region);
1705 EXPORT_SYMBOL(pci_release_selected_regions);
1706 EXPORT_SYMBOL(pci_request_selected_regions);
1707 EXPORT_SYMBOL(pci_set_master);
1708 EXPORT_SYMBOL(pci_set_mwi);
1709 EXPORT_SYMBOL(pci_try_set_mwi);
1710 EXPORT_SYMBOL(pci_clear_mwi);
1711 EXPORT_SYMBOL_GPL(pci_intx);
1712 EXPORT_SYMBOL(pci_set_dma_mask);
1713 EXPORT_SYMBOL(pci_set_consistent_dma_mask);
1714 EXPORT_SYMBOL(pci_assign_resource);
1715 EXPORT_SYMBOL(pci_find_parent_resource);
1716 EXPORT_SYMBOL(pci_select_bars);
1718 EXPORT_SYMBOL(pci_set_power_state);
1719 EXPORT_SYMBOL(pci_save_state);
1720 EXPORT_SYMBOL(pci_restore_state);
1721 EXPORT_SYMBOL(pci_enable_wake);
1722 EXPORT_SYMBOL_GPL(pci_set_pcie_reset_state);