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>
16 #include <linux/module.h>
17 #include <linux/spinlock.h>
18 #include <linux/string.h>
19 #include <asm/dma.h> /* isa_dma_bridge_buggy */
24 * pci_bus_max_busnr - returns maximum PCI bus number of given bus' children
25 * @bus: pointer to PCI bus structure to search
27 * Given a PCI bus, returns the highest PCI bus number present in the set
28 * including the given PCI bus and its list of child PCI buses.
30 unsigned char __devinit
31 pci_bus_max_busnr(struct pci_bus* bus)
33 struct list_head *tmp;
36 max = bus->subordinate;
37 list_for_each(tmp, &bus->children) {
38 n = pci_bus_max_busnr(pci_bus_b(tmp));
44 EXPORT_SYMBOL_GPL(pci_bus_max_busnr);
48 * pci_max_busnr - returns maximum PCI bus number
50 * Returns the highest PCI bus number present in the system global list of
53 unsigned char __devinit
56 struct pci_bus *bus = NULL;
60 while ((bus = pci_find_next_bus(bus)) != NULL) {
61 n = pci_bus_max_busnr(bus);
70 static int __pci_find_next_cap(struct pci_bus *bus, unsigned int devfn, u8 pos, int cap)
76 pci_bus_read_config_byte(bus, devfn, pos, &pos);
80 pci_bus_read_config_byte(bus, devfn, pos + PCI_CAP_LIST_ID,
86 pos += PCI_CAP_LIST_NEXT;
91 int pci_find_next_capability(struct pci_dev *dev, u8 pos, int cap)
93 return __pci_find_next_cap(dev->bus, dev->devfn,
94 pos + PCI_CAP_LIST_NEXT, cap);
96 EXPORT_SYMBOL_GPL(pci_find_next_capability);
98 static int __pci_bus_find_cap(struct pci_bus *bus, unsigned int devfn, u8 hdr_type, int cap)
103 pci_bus_read_config_word(bus, devfn, PCI_STATUS, &status);
104 if (!(status & PCI_STATUS_CAP_LIST))
108 case PCI_HEADER_TYPE_NORMAL:
109 case PCI_HEADER_TYPE_BRIDGE:
110 pos = PCI_CAPABILITY_LIST;
112 case PCI_HEADER_TYPE_CARDBUS:
113 pos = PCI_CB_CAPABILITY_LIST;
118 return __pci_find_next_cap(bus, devfn, pos, cap);
122 * pci_find_capability - query for devices' capabilities
123 * @dev: PCI device to query
124 * @cap: capability code
126 * Tell if a device supports a given PCI capability.
127 * Returns the address of the requested capability structure within the
128 * device's PCI configuration space or 0 in case the device does not
129 * support it. Possible values for @cap:
131 * %PCI_CAP_ID_PM Power Management
132 * %PCI_CAP_ID_AGP Accelerated Graphics Port
133 * %PCI_CAP_ID_VPD Vital Product Data
134 * %PCI_CAP_ID_SLOTID Slot Identification
135 * %PCI_CAP_ID_MSI Message Signalled Interrupts
136 * %PCI_CAP_ID_CHSWP CompactPCI HotSwap
137 * %PCI_CAP_ID_PCIX PCI-X
138 * %PCI_CAP_ID_EXP PCI Express
140 int pci_find_capability(struct pci_dev *dev, int cap)
142 return __pci_bus_find_cap(dev->bus, dev->devfn, dev->hdr_type, cap);
146 * pci_bus_find_capability - query for devices' capabilities
147 * @bus: the PCI bus to query
148 * @devfn: PCI device to query
149 * @cap: capability code
151 * Like pci_find_capability() but works for pci devices that do not have a
152 * pci_dev structure set up yet.
154 * Returns the address of the requested capability structure within the
155 * device's PCI configuration space or 0 in case the device does not
158 int pci_bus_find_capability(struct pci_bus *bus, unsigned int devfn, int cap)
162 pci_bus_read_config_byte(bus, devfn, PCI_HEADER_TYPE, &hdr_type);
164 return __pci_bus_find_cap(bus, devfn, hdr_type & 0x7f, cap);
169 * pci_find_ext_capability - Find an extended capability
170 * @dev: PCI device to query
171 * @cap: capability code
173 * Returns the address of the requested extended capability structure
174 * within the device's PCI configuration space or 0 if the device does
175 * not support it. Possible values for @cap:
177 * %PCI_EXT_CAP_ID_ERR Advanced Error Reporting
178 * %PCI_EXT_CAP_ID_VC Virtual Channel
179 * %PCI_EXT_CAP_ID_DSN Device Serial Number
180 * %PCI_EXT_CAP_ID_PWR Power Budgeting
182 int pci_find_ext_capability(struct pci_dev *dev, int cap)
185 int ttl = 480; /* 3840 bytes, minimum 8 bytes per capability */
188 if (dev->cfg_size <= 256)
191 if (pci_read_config_dword(dev, pos, &header) != PCIBIOS_SUCCESSFUL)
195 * If we have no capabilities, this is indicated by cap ID,
196 * cap version and next pointer all being 0.
202 if (PCI_EXT_CAP_ID(header) == cap)
205 pos = PCI_EXT_CAP_NEXT(header);
209 if (pci_read_config_dword(dev, pos, &header) != PCIBIOS_SUCCESSFUL)
218 * pci_find_parent_resource - return resource region of parent bus of given region
219 * @dev: PCI device structure contains resources to be searched
220 * @res: child resource record for which parent is sought
222 * For given resource region of given device, return the resource
223 * region of parent bus the given region is contained in or where
224 * it should be allocated from.
227 pci_find_parent_resource(const struct pci_dev *dev, struct resource *res)
229 const struct pci_bus *bus = dev->bus;
231 struct resource *best = NULL;
233 for(i = 0; i < PCI_BUS_NUM_RESOURCES; i++) {
234 struct resource *r = bus->resource[i];
237 if (res->start && !(res->start >= r->start && res->end <= r->end))
238 continue; /* Not contained */
239 if ((res->flags ^ r->flags) & (IORESOURCE_IO | IORESOURCE_MEM))
240 continue; /* Wrong type */
241 if (!((res->flags ^ r->flags) & IORESOURCE_PREFETCH))
242 return r; /* Exact match */
243 if ((res->flags & IORESOURCE_PREFETCH) && !(r->flags & IORESOURCE_PREFETCH))
244 best = r; /* Approximating prefetchable by non-prefetchable */
250 * pci_restore_bars - restore a devices BAR values (e.g. after wake-up)
251 * @dev: PCI device to have its BARs restored
253 * Restore the BAR values for a given device, so as to make it
254 * accessible by its driver.
257 pci_restore_bars(struct pci_dev *dev)
261 switch (dev->hdr_type) {
262 case PCI_HEADER_TYPE_NORMAL:
265 case PCI_HEADER_TYPE_BRIDGE:
268 case PCI_HEADER_TYPE_CARDBUS:
272 /* Should never get here, but just in case... */
276 for (i = 0; i < numres; i ++)
277 pci_update_resource(dev, &dev->resource[i], i);
280 int (*platform_pci_set_power_state)(struct pci_dev *dev, pci_power_t t);
283 * pci_set_power_state - Set the power state of a PCI device
284 * @dev: PCI device to be suspended
285 * @state: PCI power state (D0, D1, D2, D3hot, D3cold) we're entering
287 * Transition a device to a new power state, using the Power Management
288 * Capabilities in the device's config space.
291 * -EINVAL if trying to enter a lower state than we're already in.
292 * 0 if we're already in the requested state.
293 * -EIO if device does not support PCI PM.
294 * 0 if we can successfully change the power state.
297 pci_set_power_state(struct pci_dev *dev, pci_power_t state)
299 int pm, need_restore = 0;
302 /* bound the state we're entering */
303 if (state > PCI_D3hot)
306 /* Validate current state:
307 * Can enter D0 from any state, but if we can only go deeper
308 * to sleep if we're already in a low power state
310 if (state != PCI_D0 && dev->current_state > state)
312 else if (dev->current_state == state)
313 return 0; /* we're already there */
315 /* find PCI PM capability in list */
316 pm = pci_find_capability(dev, PCI_CAP_ID_PM);
318 /* abort if the device doesn't support PM capabilities */
322 pci_read_config_word(dev,pm + PCI_PM_PMC,&pmc);
323 if ((pmc & PCI_PM_CAP_VER_MASK) > 3) {
325 "PCI: %s has unsupported PM cap regs version (%u)\n",
326 pci_name(dev), pmc & PCI_PM_CAP_VER_MASK);
330 /* check if this device supports the desired state */
331 if (state == PCI_D1 && !(pmc & PCI_PM_CAP_D1))
333 else if (state == PCI_D2 && !(pmc & PCI_PM_CAP_D2))
336 pci_read_config_word(dev, pm + PCI_PM_CTRL, &pmcsr);
338 /* If we're (effectively) in D3, force entire word to 0.
339 * This doesn't affect PME_Status, disables PME_En, and
340 * sets PowerState to 0.
342 switch (dev->current_state) {
346 pmcsr &= ~PCI_PM_CTRL_STATE_MASK;
349 case PCI_UNKNOWN: /* Boot-up */
350 if ((pmcsr & PCI_PM_CTRL_STATE_MASK) == PCI_D3hot
351 && !(pmcsr & PCI_PM_CTRL_NO_SOFT_RESET))
353 /* Fall-through: force to D0 */
359 /* enter specified state */
360 pci_write_config_word(dev, pm + PCI_PM_CTRL, pmcsr);
362 /* Mandatory power management transition delays */
363 /* see PCI PM 1.1 5.6.1 table 18 */
364 if (state == PCI_D3hot || dev->current_state == PCI_D3hot)
366 else if (state == PCI_D2 || dev->current_state == PCI_D2)
370 * Give firmware a chance to be called, such as ACPI _PRx, _PSx
371 * Firmware method after natice method ?
373 if (platform_pci_set_power_state)
374 platform_pci_set_power_state(dev, state);
376 dev->current_state = state;
378 /* According to section 5.4.1 of the "PCI BUS POWER MANAGEMENT
379 * INTERFACE SPECIFICATION, REV. 1.2", a device transitioning
380 * from D3hot to D0 _may_ perform an internal reset, thereby
381 * going to "D0 Uninitialized" rather than "D0 Initialized".
382 * For example, at least some versions of the 3c905B and the
383 * 3c556B exhibit this behaviour.
385 * At least some laptop BIOSen (e.g. the Thinkpad T21) leave
386 * devices in a D3hot state at boot. Consequently, we need to
387 * restore at least the BARs so that the device will be
388 * accessible to its driver.
391 pci_restore_bars(dev);
396 int (*platform_pci_choose_state)(struct pci_dev *dev, pm_message_t state);
399 * pci_choose_state - Choose the power state of a PCI device
400 * @dev: PCI device to be suspended
401 * @state: target sleep state for the whole system. This is the value
402 * that is passed to suspend() function.
404 * Returns PCI power state suitable for given device and given system
408 pci_power_t pci_choose_state(struct pci_dev *dev, pm_message_t state)
412 if (!pci_find_capability(dev, PCI_CAP_ID_PM))
415 if (platform_pci_choose_state) {
416 ret = platform_pci_choose_state(dev, state);
421 switch (state.event) {
424 case PM_EVENT_FREEZE:
425 case PM_EVENT_SUSPEND:
428 printk("They asked me for state %d\n", state.event);
434 EXPORT_SYMBOL(pci_choose_state);
437 * pci_save_state - save the PCI configuration space of a device before suspending
438 * @dev: - PCI device that we're dealing with
441 pci_save_state(struct pci_dev *dev)
444 /* XXX: 100% dword access ok here? */
445 for (i = 0; i < 16; i++)
446 pci_read_config_dword(dev, i * 4,&dev->saved_config_space[i]);
451 * pci_restore_state - Restore the saved state of a PCI device
452 * @dev: - PCI device that we're dealing with
455 pci_restore_state(struct pci_dev *dev)
459 for (i = 0; i < 16; i++)
460 pci_write_config_dword(dev,i * 4, dev->saved_config_space[i]);
465 * pci_enable_device_bars - Initialize some of a device for use
466 * @dev: PCI device to be initialized
467 * @bars: bitmask of BAR's that must be configured
469 * Initialize device before it's used by a driver. Ask low-level code
470 * to enable selected I/O and memory resources. Wake up the device if it
471 * was suspended. Beware, this function can fail.
475 pci_enable_device_bars(struct pci_dev *dev, int bars)
479 err = pci_set_power_state(dev, PCI_D0);
480 if (err < 0 && err != -EIO)
482 err = pcibios_enable_device(dev, bars);
489 * pci_enable_device - Initialize device before it's used by a driver.
490 * @dev: PCI device to be initialized
492 * Initialize device before it's used by a driver. Ask low-level code
493 * to enable I/O and memory. Wake up the device if it was suspended.
494 * Beware, this function can fail.
497 pci_enable_device(struct pci_dev *dev)
499 int err = pci_enable_device_bars(dev, (1 << PCI_NUM_RESOURCES) - 1);
502 pci_fixup_device(pci_fixup_enable, dev);
508 * pcibios_disable_device - disable arch specific PCI resources for device dev
509 * @dev: the PCI device to disable
511 * Disables architecture specific PCI resources for the device. This
512 * is the default implementation. Architecture implementations can
515 void __attribute__ ((weak)) pcibios_disable_device (struct pci_dev *dev) {}
518 * pci_disable_device - Disable PCI device after use
519 * @dev: PCI device to be disabled
521 * Signal to the system that the PCI device is not in use by the system
522 * anymore. This only involves disabling PCI bus-mastering, if active.
525 pci_disable_device(struct pci_dev *dev)
529 pci_read_config_word(dev, PCI_COMMAND, &pci_command);
530 if (pci_command & PCI_COMMAND_MASTER) {
531 pci_command &= ~PCI_COMMAND_MASTER;
532 pci_write_config_word(dev, PCI_COMMAND, pci_command);
534 dev->is_busmaster = 0;
536 pcibios_disable_device(dev);
541 * pci_enable_wake - enable device to generate PME# when suspended
542 * @dev: - PCI device to operate on
543 * @state: - Current state of device.
544 * @enable: - Flag to enable or disable generation
546 * Set the bits in the device's PM Capabilities to generate PME# when
547 * the system is suspended.
549 * -EIO is returned if device doesn't have PM Capabilities.
550 * -EINVAL is returned if device supports it, but can't generate wake events.
551 * 0 if operation is successful.
554 int pci_enable_wake(struct pci_dev *dev, pci_power_t state, int enable)
559 /* find PCI PM capability in list */
560 pm = pci_find_capability(dev, PCI_CAP_ID_PM);
562 /* If device doesn't support PM Capabilities, but request is to disable
563 * wake events, it's a nop; otherwise fail */
565 return enable ? -EIO : 0;
567 /* Check device's ability to generate PME# */
568 pci_read_config_word(dev,pm+PCI_PM_PMC,&value);
570 value &= PCI_PM_CAP_PME_MASK;
571 value >>= ffs(PCI_PM_CAP_PME_MASK) - 1; /* First bit of mask */
573 /* Check if it can generate PME# from requested state. */
574 if (!value || !(value & (1 << state)))
575 return enable ? -EINVAL : 0;
577 pci_read_config_word(dev, pm + PCI_PM_CTRL, &value);
579 /* Clear PME_Status by writing 1 to it and enable PME# */
580 value |= PCI_PM_CTRL_PME_STATUS | PCI_PM_CTRL_PME_ENABLE;
583 value &= ~PCI_PM_CTRL_PME_ENABLE;
585 pci_write_config_word(dev, pm + PCI_PM_CTRL, value);
591 pci_get_interrupt_pin(struct pci_dev *dev, struct pci_dev **bridge)
599 while (dev->bus->self) {
600 pin = (pin + PCI_SLOT(dev->devfn)) % 4;
601 dev = dev->bus->self;
608 * pci_release_region - Release a PCI bar
609 * @pdev: PCI device whose resources were previously reserved by pci_request_region
610 * @bar: BAR to release
612 * Releases the PCI I/O and memory resources previously reserved by a
613 * successful call to pci_request_region. Call this function only
614 * after all use of the PCI regions has ceased.
616 void pci_release_region(struct pci_dev *pdev, int bar)
618 if (pci_resource_len(pdev, bar) == 0)
620 if (pci_resource_flags(pdev, bar) & IORESOURCE_IO)
621 release_region(pci_resource_start(pdev, bar),
622 pci_resource_len(pdev, bar));
623 else if (pci_resource_flags(pdev, bar) & IORESOURCE_MEM)
624 release_mem_region(pci_resource_start(pdev, bar),
625 pci_resource_len(pdev, bar));
629 * pci_request_region - Reserved PCI I/O and memory resource
630 * @pdev: PCI device whose resources are to be reserved
631 * @bar: BAR to be reserved
632 * @res_name: Name to be associated with resource.
634 * Mark the PCI region associated with PCI device @pdev BR @bar as
635 * being reserved by owner @res_name. Do not access any
636 * address inside the PCI regions unless this call returns
639 * Returns 0 on success, or %EBUSY on error. A warning
640 * message is also printed on failure.
642 int pci_request_region(struct pci_dev *pdev, int bar, const char *res_name)
644 if (pci_resource_len(pdev, bar) == 0)
647 if (pci_resource_flags(pdev, bar) & IORESOURCE_IO) {
648 if (!request_region(pci_resource_start(pdev, bar),
649 pci_resource_len(pdev, bar), res_name))
652 else if (pci_resource_flags(pdev, bar) & IORESOURCE_MEM) {
653 if (!request_mem_region(pci_resource_start(pdev, bar),
654 pci_resource_len(pdev, bar), res_name))
661 printk (KERN_WARNING "PCI: Unable to reserve %s region #%d:%lx@%lx for device %s\n",
662 pci_resource_flags(pdev, bar) & IORESOURCE_IO ? "I/O" : "mem",
663 bar + 1, /* PCI BAR # */
664 pci_resource_len(pdev, bar), pci_resource_start(pdev, bar),
671 * pci_release_regions - Release reserved PCI I/O and memory resources
672 * @pdev: PCI device whose resources were previously reserved by pci_request_regions
674 * Releases all PCI I/O and memory resources previously reserved by a
675 * successful call to pci_request_regions. Call this function only
676 * after all use of the PCI regions has ceased.
679 void pci_release_regions(struct pci_dev *pdev)
683 for (i = 0; i < 6; i++)
684 pci_release_region(pdev, i);
688 * pci_request_regions - Reserved PCI I/O and memory resources
689 * @pdev: PCI device whose resources are to be reserved
690 * @res_name: Name to be associated with resource.
692 * Mark all PCI regions associated with PCI device @pdev as
693 * being reserved by owner @res_name. Do not access any
694 * address inside the PCI regions unless this call returns
697 * Returns 0 on success, or %EBUSY on error. A warning
698 * message is also printed on failure.
700 int pci_request_regions(struct pci_dev *pdev, const char *res_name)
704 for (i = 0; i < 6; i++)
705 if(pci_request_region(pdev, i, res_name))
711 pci_release_region(pdev, i);
717 * pci_set_master - enables bus-mastering for device dev
718 * @dev: the PCI device to enable
720 * Enables bus-mastering on the device and calls pcibios_set_master()
721 * to do the needed arch specific settings.
724 pci_set_master(struct pci_dev *dev)
728 pci_read_config_word(dev, PCI_COMMAND, &cmd);
729 if (! (cmd & PCI_COMMAND_MASTER)) {
730 pr_debug("PCI: Enabling bus mastering for device %s\n", pci_name(dev));
731 cmd |= PCI_COMMAND_MASTER;
732 pci_write_config_word(dev, PCI_COMMAND, cmd);
734 dev->is_busmaster = 1;
735 pcibios_set_master(dev);
738 #ifndef HAVE_ARCH_PCI_MWI
739 /* This can be overridden by arch code. */
740 u8 pci_cache_line_size = L1_CACHE_BYTES >> 2;
743 * pci_generic_prep_mwi - helper function for pci_set_mwi
744 * @dev: the PCI device for which MWI is enabled
746 * Helper function for generic implementation of pcibios_prep_mwi
747 * function. Originally copied from drivers/net/acenic.c.
748 * Copyright 1998-2001 by Jes Sorensen, <jes@trained-monkey.org>.
750 * RETURNS: An appropriate -ERRNO error value on error, or zero for success.
753 pci_generic_prep_mwi(struct pci_dev *dev)
757 if (!pci_cache_line_size)
758 return -EINVAL; /* The system doesn't support MWI. */
760 /* Validate current setting: the PCI_CACHE_LINE_SIZE must be
761 equal to or multiple of the right value. */
762 pci_read_config_byte(dev, PCI_CACHE_LINE_SIZE, &cacheline_size);
763 if (cacheline_size >= pci_cache_line_size &&
764 (cacheline_size % pci_cache_line_size) == 0)
767 /* Write the correct value. */
768 pci_write_config_byte(dev, PCI_CACHE_LINE_SIZE, pci_cache_line_size);
770 pci_read_config_byte(dev, PCI_CACHE_LINE_SIZE, &cacheline_size);
771 if (cacheline_size == pci_cache_line_size)
774 printk(KERN_DEBUG "PCI: cache line size of %d is not supported "
775 "by device %s\n", pci_cache_line_size << 2, pci_name(dev));
779 #endif /* !HAVE_ARCH_PCI_MWI */
782 * pci_set_mwi - enables memory-write-invalidate PCI transaction
783 * @dev: the PCI device for which MWI is enabled
785 * Enables the Memory-Write-Invalidate transaction in %PCI_COMMAND,
786 * and then calls @pcibios_set_mwi to do the needed arch specific
787 * operations or a generic mwi-prep function.
789 * RETURNS: An appropriate -ERRNO error value on error, or zero for success.
792 pci_set_mwi(struct pci_dev *dev)
797 #ifdef HAVE_ARCH_PCI_MWI
798 rc = pcibios_prep_mwi(dev);
800 rc = pci_generic_prep_mwi(dev);
806 pci_read_config_word(dev, PCI_COMMAND, &cmd);
807 if (! (cmd & PCI_COMMAND_INVALIDATE)) {
808 pr_debug("PCI: Enabling Mem-Wr-Inval for device %s\n", pci_name(dev));
809 cmd |= PCI_COMMAND_INVALIDATE;
810 pci_write_config_word(dev, PCI_COMMAND, cmd);
817 * pci_clear_mwi - disables Memory-Write-Invalidate for device dev
818 * @dev: the PCI device to disable
820 * Disables PCI Memory-Write-Invalidate transaction on the device
823 pci_clear_mwi(struct pci_dev *dev)
827 pci_read_config_word(dev, PCI_COMMAND, &cmd);
828 if (cmd & PCI_COMMAND_INVALIDATE) {
829 cmd &= ~PCI_COMMAND_INVALIDATE;
830 pci_write_config_word(dev, PCI_COMMAND, cmd);
835 * pci_intx - enables/disables PCI INTx for device dev
836 * @pdev: the PCI device to operate on
837 * @enable: boolean: whether to enable or disable PCI INTx
839 * Enables/disables PCI INTx for device dev
842 pci_intx(struct pci_dev *pdev, int enable)
844 u16 pci_command, new;
846 pci_read_config_word(pdev, PCI_COMMAND, &pci_command);
849 new = pci_command & ~PCI_COMMAND_INTX_DISABLE;
851 new = pci_command | PCI_COMMAND_INTX_DISABLE;
854 if (new != pci_command) {
855 pci_write_config_word(pdev, PCI_COMMAND, new);
859 #ifndef HAVE_ARCH_PCI_SET_DMA_MASK
861 * These can be overridden by arch-specific implementations
864 pci_set_dma_mask(struct pci_dev *dev, u64 mask)
866 if (!pci_dma_supported(dev, mask))
869 dev->dma_mask = mask;
875 pci_set_consistent_dma_mask(struct pci_dev *dev, u64 mask)
877 if (!pci_dma_supported(dev, mask))
880 dev->dev.coherent_dma_mask = mask;
886 static int __devinit pci_init(void)
888 struct pci_dev *dev = NULL;
890 while ((dev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, dev)) != NULL) {
891 pci_fixup_device(pci_fixup_final, dev);
896 static int __devinit pci_setup(char *str)
899 char *k = strchr(str, ',');
902 if (*str && (str = pcibios_setup(str)) && *str) {
903 if (!strcmp(str, "nomsi")) {
906 printk(KERN_ERR "PCI: Unknown option `%s'\n",
915 device_initcall(pci_init);
917 __setup("pci=", pci_setup);
919 #if defined(CONFIG_ISA) || defined(CONFIG_EISA)
920 /* FIXME: Some boxes have multiple ISA bridges! */
921 struct pci_dev *isa_bridge;
922 EXPORT_SYMBOL(isa_bridge);
925 EXPORT_SYMBOL_GPL(pci_restore_bars);
926 EXPORT_SYMBOL(pci_enable_device_bars);
927 EXPORT_SYMBOL(pci_enable_device);
928 EXPORT_SYMBOL(pci_disable_device);
929 EXPORT_SYMBOL(pci_find_capability);
930 EXPORT_SYMBOL(pci_bus_find_capability);
931 EXPORT_SYMBOL(pci_release_regions);
932 EXPORT_SYMBOL(pci_request_regions);
933 EXPORT_SYMBOL(pci_release_region);
934 EXPORT_SYMBOL(pci_request_region);
935 EXPORT_SYMBOL(pci_set_master);
936 EXPORT_SYMBOL(pci_set_mwi);
937 EXPORT_SYMBOL(pci_clear_mwi);
938 EXPORT_SYMBOL_GPL(pci_intx);
939 EXPORT_SYMBOL(pci_set_dma_mask);
940 EXPORT_SYMBOL(pci_set_consistent_dma_mask);
941 EXPORT_SYMBOL(pci_assign_resource);
942 EXPORT_SYMBOL(pci_find_parent_resource);
944 EXPORT_SYMBOL(pci_set_power_state);
945 EXPORT_SYMBOL(pci_save_state);
946 EXPORT_SYMBOL(pci_restore_state);
947 EXPORT_SYMBOL(pci_enable_wake);
951 EXPORT_SYMBOL(isa_dma_bridge_buggy);
952 EXPORT_SYMBOL(pci_pci_problems);