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);
168 * pci_find_ext_capability - Find an extended capability
169 * @dev: PCI device to query
170 * @cap: capability code
172 * Returns the address of the requested extended capability structure
173 * within the device's PCI configuration space or 0 if the device does
174 * not support it. Possible values for @cap:
176 * %PCI_EXT_CAP_ID_ERR Advanced Error Reporting
177 * %PCI_EXT_CAP_ID_VC Virtual Channel
178 * %PCI_EXT_CAP_ID_DSN Device Serial Number
179 * %PCI_EXT_CAP_ID_PWR Power Budgeting
181 int pci_find_ext_capability(struct pci_dev *dev, int cap)
184 int ttl = 480; /* 3840 bytes, minimum 8 bytes per capability */
187 if (dev->cfg_size <= 256)
190 if (pci_read_config_dword(dev, pos, &header) != PCIBIOS_SUCCESSFUL)
194 * If we have no capabilities, this is indicated by cap ID,
195 * cap version and next pointer all being 0.
201 if (PCI_EXT_CAP_ID(header) == cap)
204 pos = PCI_EXT_CAP_NEXT(header);
208 if (pci_read_config_dword(dev, pos, &header) != PCIBIOS_SUCCESSFUL)
214 EXPORT_SYMBOL_GPL(pci_find_ext_capability);
217 * pci_find_parent_resource - return resource region of parent bus of given region
218 * @dev: PCI device structure contains resources to be searched
219 * @res: child resource record for which parent is sought
221 * For given resource region of given device, return the resource
222 * region of parent bus the given region is contained in or where
223 * it should be allocated from.
226 pci_find_parent_resource(const struct pci_dev *dev, struct resource *res)
228 const struct pci_bus *bus = dev->bus;
230 struct resource *best = NULL;
232 for(i = 0; i < PCI_BUS_NUM_RESOURCES; i++) {
233 struct resource *r = bus->resource[i];
236 if (res->start && !(res->start >= r->start && res->end <= r->end))
237 continue; /* Not contained */
238 if ((res->flags ^ r->flags) & (IORESOURCE_IO | IORESOURCE_MEM))
239 continue; /* Wrong type */
240 if (!((res->flags ^ r->flags) & IORESOURCE_PREFETCH))
241 return r; /* Exact match */
242 if ((res->flags & IORESOURCE_PREFETCH) && !(r->flags & IORESOURCE_PREFETCH))
243 best = r; /* Approximating prefetchable by non-prefetchable */
249 * pci_restore_bars - restore a devices BAR values (e.g. after wake-up)
250 * @dev: PCI device to have its BARs restored
252 * Restore the BAR values for a given device, so as to make it
253 * accessible by its driver.
256 pci_restore_bars(struct pci_dev *dev)
260 switch (dev->hdr_type) {
261 case PCI_HEADER_TYPE_NORMAL:
264 case PCI_HEADER_TYPE_BRIDGE:
267 case PCI_HEADER_TYPE_CARDBUS:
271 /* Should never get here, but just in case... */
275 for (i = 0; i < numres; i ++)
276 pci_update_resource(dev, &dev->resource[i], i);
279 int (*platform_pci_set_power_state)(struct pci_dev *dev, pci_power_t t);
282 * pci_set_power_state - Set the power state of a PCI device
283 * @dev: PCI device to be suspended
284 * @state: PCI power state (D0, D1, D2, D3hot, D3cold) we're entering
286 * Transition a device to a new power state, using the Power Management
287 * Capabilities in the device's config space.
290 * -EINVAL if trying to enter a lower state than we're already in.
291 * 0 if we're already in the requested state.
292 * -EIO if device does not support PCI PM.
293 * 0 if we can successfully change the power state.
296 pci_set_power_state(struct pci_dev *dev, pci_power_t state)
298 int pm, need_restore = 0;
301 /* bound the state we're entering */
302 if (state > PCI_D3hot)
305 /* Validate current state:
306 * Can enter D0 from any state, but if we can only go deeper
307 * to sleep if we're already in a low power state
309 if (state != PCI_D0 && dev->current_state > state) {
310 printk(KERN_ERR "%s(): %s: state=%d, current state=%d\n",
311 __FUNCTION__, pci_name(dev), state, dev->current_state);
313 } else if (dev->current_state == state)
314 return 0; /* we're already there */
316 /* find PCI PM capability in list */
317 pm = pci_find_capability(dev, PCI_CAP_ID_PM);
319 /* abort if the device doesn't support PM capabilities */
323 pci_read_config_word(dev,pm + PCI_PM_PMC,&pmc);
324 if ((pmc & PCI_PM_CAP_VER_MASK) > 3) {
326 "PCI: %s has unsupported PM cap regs version (%u)\n",
327 pci_name(dev), pmc & PCI_PM_CAP_VER_MASK);
331 /* check if this device supports the desired state */
332 if (state == PCI_D1 && !(pmc & PCI_PM_CAP_D1))
334 else if (state == PCI_D2 && !(pmc & PCI_PM_CAP_D2))
337 pci_read_config_word(dev, pm + PCI_PM_CTRL, &pmcsr);
339 /* If we're (effectively) in D3, force entire word to 0.
340 * This doesn't affect PME_Status, disables PME_En, and
341 * sets PowerState to 0.
343 switch (dev->current_state) {
347 pmcsr &= ~PCI_PM_CTRL_STATE_MASK;
350 case PCI_UNKNOWN: /* Boot-up */
351 if ((pmcsr & PCI_PM_CTRL_STATE_MASK) == PCI_D3hot
352 && !(pmcsr & PCI_PM_CTRL_NO_SOFT_RESET))
354 /* Fall-through: force to D0 */
360 /* enter specified state */
361 pci_write_config_word(dev, pm + PCI_PM_CTRL, pmcsr);
363 /* Mandatory power management transition delays */
364 /* see PCI PM 1.1 5.6.1 table 18 */
365 if (state == PCI_D3hot || dev->current_state == PCI_D3hot)
367 else if (state == PCI_D2 || dev->current_state == PCI_D2)
371 * Give firmware a chance to be called, such as ACPI _PRx, _PSx
372 * Firmware method after natice method ?
374 if (platform_pci_set_power_state)
375 platform_pci_set_power_state(dev, state);
377 dev->current_state = state;
379 /* According to section 5.4.1 of the "PCI BUS POWER MANAGEMENT
380 * INTERFACE SPECIFICATION, REV. 1.2", a device transitioning
381 * from D3hot to D0 _may_ perform an internal reset, thereby
382 * going to "D0 Uninitialized" rather than "D0 Initialized".
383 * For example, at least some versions of the 3c905B and the
384 * 3c556B exhibit this behaviour.
386 * At least some laptop BIOSen (e.g. the Thinkpad T21) leave
387 * devices in a D3hot state at boot. Consequently, we need to
388 * restore at least the BARs so that the device will be
389 * accessible to its driver.
392 pci_restore_bars(dev);
397 int (*platform_pci_choose_state)(struct pci_dev *dev, pm_message_t state);
400 * pci_choose_state - Choose the power state of a PCI device
401 * @dev: PCI device to be suspended
402 * @state: target sleep state for the whole system. This is the value
403 * that is passed to suspend() function.
405 * Returns PCI power state suitable for given device and given system
409 pci_power_t pci_choose_state(struct pci_dev *dev, pm_message_t state)
413 if (!pci_find_capability(dev, PCI_CAP_ID_PM))
416 if (platform_pci_choose_state) {
417 ret = platform_pci_choose_state(dev, state);
422 switch (state.event) {
425 case PM_EVENT_FREEZE:
426 case PM_EVENT_SUSPEND:
429 printk("They asked me for state %d\n", state.event);
435 EXPORT_SYMBOL(pci_choose_state);
438 * pci_save_state - save the PCI configuration space of a device before suspending
439 * @dev: - PCI device that we're dealing with
442 pci_save_state(struct pci_dev *dev)
445 /* XXX: 100% dword access ok here? */
446 for (i = 0; i < 16; i++)
447 pci_read_config_dword(dev, i * 4,&dev->saved_config_space[i]);
448 if ((i = pci_save_msi_state(dev)) != 0)
450 if ((i = pci_save_msix_state(dev)) != 0)
456 * pci_restore_state - Restore the saved state of a PCI device
457 * @dev: - PCI device that we're dealing with
460 pci_restore_state(struct pci_dev *dev)
466 * The Base Address register should be programmed before the command
469 for (i = 15; i >= 0; i--) {
470 pci_read_config_dword(dev, i * 4, &val);
471 if (val != dev->saved_config_space[i]) {
472 printk(KERN_DEBUG "PM: Writing back config space on "
473 "device %s at offset %x (was %x, writing %x)\n",
475 val, (int)dev->saved_config_space[i]);
476 pci_write_config_dword(dev,i * 4,
477 dev->saved_config_space[i]);
480 pci_restore_msi_state(dev);
481 pci_restore_msix_state(dev);
486 * pci_enable_device_bars - Initialize some of a device for use
487 * @dev: PCI device to be initialized
488 * @bars: bitmask of BAR's that must be configured
490 * Initialize device before it's used by a driver. Ask low-level code
491 * to enable selected I/O and memory resources. Wake up the device if it
492 * was suspended. Beware, this function can fail.
496 pci_enable_device_bars(struct pci_dev *dev, int bars)
500 err = pci_set_power_state(dev, PCI_D0);
501 if (err < 0 && err != -EIO)
503 err = pcibios_enable_device(dev, bars);
510 * pci_enable_device - Initialize device before it's used by a driver.
511 * @dev: PCI device to be initialized
513 * Initialize device before it's used by a driver. Ask low-level code
514 * to enable I/O and memory. Wake up the device if it was suspended.
515 * Beware, this function can fail.
518 pci_enable_device(struct pci_dev *dev)
525 err = pci_enable_device_bars(dev, (1 << PCI_NUM_RESOURCES) - 1);
528 pci_fixup_device(pci_fixup_enable, dev);
534 * pcibios_disable_device - disable arch specific PCI resources for device dev
535 * @dev: the PCI device to disable
537 * Disables architecture specific PCI resources for the device. This
538 * is the default implementation. Architecture implementations can
541 void __attribute__ ((weak)) pcibios_disable_device (struct pci_dev *dev) {}
544 * pci_disable_device - Disable PCI device after use
545 * @dev: PCI device to be disabled
547 * Signal to the system that the PCI device is not in use by the system
548 * anymore. This only involves disabling PCI bus-mastering, if active.
551 pci_disable_device(struct pci_dev *dev)
555 if (dev->msi_enabled)
556 disable_msi_mode(dev, pci_find_capability(dev, PCI_CAP_ID_MSI),
558 if (dev->msix_enabled)
559 disable_msi_mode(dev, pci_find_capability(dev, PCI_CAP_ID_MSI),
562 pci_read_config_word(dev, PCI_COMMAND, &pci_command);
563 if (pci_command & PCI_COMMAND_MASTER) {
564 pci_command &= ~PCI_COMMAND_MASTER;
565 pci_write_config_word(dev, PCI_COMMAND, pci_command);
567 dev->is_busmaster = 0;
569 pcibios_disable_device(dev);
574 * pci_enable_wake - enable device to generate PME# when suspended
575 * @dev: - PCI device to operate on
576 * @state: - Current state of device.
577 * @enable: - Flag to enable or disable generation
579 * Set the bits in the device's PM Capabilities to generate PME# when
580 * the system is suspended.
582 * -EIO is returned if device doesn't have PM Capabilities.
583 * -EINVAL is returned if device supports it, but can't generate wake events.
584 * 0 if operation is successful.
587 int pci_enable_wake(struct pci_dev *dev, pci_power_t state, int enable)
592 /* find PCI PM capability in list */
593 pm = pci_find_capability(dev, PCI_CAP_ID_PM);
595 /* If device doesn't support PM Capabilities, but request is to disable
596 * wake events, it's a nop; otherwise fail */
598 return enable ? -EIO : 0;
600 /* Check device's ability to generate PME# */
601 pci_read_config_word(dev,pm+PCI_PM_PMC,&value);
603 value &= PCI_PM_CAP_PME_MASK;
604 value >>= ffs(PCI_PM_CAP_PME_MASK) - 1; /* First bit of mask */
606 /* Check if it can generate PME# from requested state. */
607 if (!value || !(value & (1 << state)))
608 return enable ? -EINVAL : 0;
610 pci_read_config_word(dev, pm + PCI_PM_CTRL, &value);
612 /* Clear PME_Status by writing 1 to it and enable PME# */
613 value |= PCI_PM_CTRL_PME_STATUS | PCI_PM_CTRL_PME_ENABLE;
616 value &= ~PCI_PM_CTRL_PME_ENABLE;
618 pci_write_config_word(dev, pm + PCI_PM_CTRL, value);
624 pci_get_interrupt_pin(struct pci_dev *dev, struct pci_dev **bridge)
632 while (dev->bus->self) {
633 pin = (pin + PCI_SLOT(dev->devfn)) % 4;
634 dev = dev->bus->self;
641 * pci_release_region - Release a PCI bar
642 * @pdev: PCI device whose resources were previously reserved by pci_request_region
643 * @bar: BAR to release
645 * Releases the PCI I/O and memory resources previously reserved by a
646 * successful call to pci_request_region. Call this function only
647 * after all use of the PCI regions has ceased.
649 void pci_release_region(struct pci_dev *pdev, int bar)
651 if (pci_resource_len(pdev, bar) == 0)
653 if (pci_resource_flags(pdev, bar) & IORESOURCE_IO)
654 release_region(pci_resource_start(pdev, bar),
655 pci_resource_len(pdev, bar));
656 else if (pci_resource_flags(pdev, bar) & IORESOURCE_MEM)
657 release_mem_region(pci_resource_start(pdev, bar),
658 pci_resource_len(pdev, bar));
662 * pci_request_region - Reserved PCI I/O and memory resource
663 * @pdev: PCI device whose resources are to be reserved
664 * @bar: BAR to be reserved
665 * @res_name: Name to be associated with resource.
667 * Mark the PCI region associated with PCI device @pdev BR @bar as
668 * being reserved by owner @res_name. Do not access any
669 * address inside the PCI regions unless this call returns
672 * Returns 0 on success, or %EBUSY on error. A warning
673 * message is also printed on failure.
675 int pci_request_region(struct pci_dev *pdev, int bar, const char *res_name)
677 if (pci_resource_len(pdev, bar) == 0)
680 if (pci_resource_flags(pdev, bar) & IORESOURCE_IO) {
681 if (!request_region(pci_resource_start(pdev, bar),
682 pci_resource_len(pdev, bar), res_name))
685 else if (pci_resource_flags(pdev, bar) & IORESOURCE_MEM) {
686 if (!request_mem_region(pci_resource_start(pdev, bar),
687 pci_resource_len(pdev, bar), res_name))
694 printk (KERN_WARNING "PCI: Unable to reserve %s region #%d:%lx@%lx for device %s\n",
695 pci_resource_flags(pdev, bar) & IORESOURCE_IO ? "I/O" : "mem",
696 bar + 1, /* PCI BAR # */
697 pci_resource_len(pdev, bar), pci_resource_start(pdev, bar),
704 * pci_release_regions - Release reserved PCI I/O and memory resources
705 * @pdev: PCI device whose resources were previously reserved by pci_request_regions
707 * Releases all PCI I/O and memory resources previously reserved by a
708 * successful call to pci_request_regions. Call this function only
709 * after all use of the PCI regions has ceased.
712 void pci_release_regions(struct pci_dev *pdev)
716 for (i = 0; i < 6; i++)
717 pci_release_region(pdev, i);
721 * pci_request_regions - Reserved PCI I/O and memory resources
722 * @pdev: PCI device whose resources are to be reserved
723 * @res_name: Name to be associated with resource.
725 * Mark all PCI regions associated with PCI device @pdev as
726 * being reserved by owner @res_name. Do not access any
727 * address inside the PCI regions unless this call returns
730 * Returns 0 on success, or %EBUSY on error. A warning
731 * message is also printed on failure.
733 int pci_request_regions(struct pci_dev *pdev, const char *res_name)
737 for (i = 0; i < 6; i++)
738 if(pci_request_region(pdev, i, res_name))
744 pci_release_region(pdev, i);
750 * pci_set_master - enables bus-mastering for device dev
751 * @dev: the PCI device to enable
753 * Enables bus-mastering on the device and calls pcibios_set_master()
754 * to do the needed arch specific settings.
757 pci_set_master(struct pci_dev *dev)
761 pci_read_config_word(dev, PCI_COMMAND, &cmd);
762 if (! (cmd & PCI_COMMAND_MASTER)) {
763 pr_debug("PCI: Enabling bus mastering for device %s\n", pci_name(dev));
764 cmd |= PCI_COMMAND_MASTER;
765 pci_write_config_word(dev, PCI_COMMAND, cmd);
767 dev->is_busmaster = 1;
768 pcibios_set_master(dev);
771 #ifndef HAVE_ARCH_PCI_MWI
772 /* This can be overridden by arch code. */
773 u8 pci_cache_line_size = L1_CACHE_BYTES >> 2;
776 * pci_generic_prep_mwi - helper function for pci_set_mwi
777 * @dev: the PCI device for which MWI is enabled
779 * Helper function for generic implementation of pcibios_prep_mwi
780 * function. Originally copied from drivers/net/acenic.c.
781 * Copyright 1998-2001 by Jes Sorensen, <jes@trained-monkey.org>.
783 * RETURNS: An appropriate -ERRNO error value on error, or zero for success.
786 pci_generic_prep_mwi(struct pci_dev *dev)
790 if (!pci_cache_line_size)
791 return -EINVAL; /* The system doesn't support MWI. */
793 /* Validate current setting: the PCI_CACHE_LINE_SIZE must be
794 equal to or multiple of the right value. */
795 pci_read_config_byte(dev, PCI_CACHE_LINE_SIZE, &cacheline_size);
796 if (cacheline_size >= pci_cache_line_size &&
797 (cacheline_size % pci_cache_line_size) == 0)
800 /* Write the correct value. */
801 pci_write_config_byte(dev, PCI_CACHE_LINE_SIZE, pci_cache_line_size);
803 pci_read_config_byte(dev, PCI_CACHE_LINE_SIZE, &cacheline_size);
804 if (cacheline_size == pci_cache_line_size)
807 printk(KERN_DEBUG "PCI: cache line size of %d is not supported "
808 "by device %s\n", pci_cache_line_size << 2, pci_name(dev));
812 #endif /* !HAVE_ARCH_PCI_MWI */
815 * pci_set_mwi - enables memory-write-invalidate PCI transaction
816 * @dev: the PCI device for which MWI is enabled
818 * Enables the Memory-Write-Invalidate transaction in %PCI_COMMAND,
819 * and then calls @pcibios_set_mwi to do the needed arch specific
820 * operations or a generic mwi-prep function.
822 * RETURNS: An appropriate -ERRNO error value on error, or zero for success.
825 pci_set_mwi(struct pci_dev *dev)
830 #ifdef HAVE_ARCH_PCI_MWI
831 rc = pcibios_prep_mwi(dev);
833 rc = pci_generic_prep_mwi(dev);
839 pci_read_config_word(dev, PCI_COMMAND, &cmd);
840 if (! (cmd & PCI_COMMAND_INVALIDATE)) {
841 pr_debug("PCI: Enabling Mem-Wr-Inval for device %s\n", pci_name(dev));
842 cmd |= PCI_COMMAND_INVALIDATE;
843 pci_write_config_word(dev, PCI_COMMAND, cmd);
850 * pci_clear_mwi - disables Memory-Write-Invalidate for device dev
851 * @dev: the PCI device to disable
853 * Disables PCI Memory-Write-Invalidate transaction on the device
856 pci_clear_mwi(struct pci_dev *dev)
860 pci_read_config_word(dev, PCI_COMMAND, &cmd);
861 if (cmd & PCI_COMMAND_INVALIDATE) {
862 cmd &= ~PCI_COMMAND_INVALIDATE;
863 pci_write_config_word(dev, PCI_COMMAND, cmd);
868 * pci_intx - enables/disables PCI INTx for device dev
869 * @pdev: the PCI device to operate on
870 * @enable: boolean: whether to enable or disable PCI INTx
872 * Enables/disables PCI INTx for device dev
875 pci_intx(struct pci_dev *pdev, int enable)
877 u16 pci_command, new;
879 pci_read_config_word(pdev, PCI_COMMAND, &pci_command);
882 new = pci_command & ~PCI_COMMAND_INTX_DISABLE;
884 new = pci_command | PCI_COMMAND_INTX_DISABLE;
887 if (new != pci_command) {
888 pci_write_config_word(pdev, PCI_COMMAND, new);
892 #ifndef HAVE_ARCH_PCI_SET_DMA_MASK
894 * These can be overridden by arch-specific implementations
897 pci_set_dma_mask(struct pci_dev *dev, u64 mask)
899 if (!pci_dma_supported(dev, mask))
902 dev->dma_mask = mask;
908 pci_set_consistent_dma_mask(struct pci_dev *dev, u64 mask)
910 if (!pci_dma_supported(dev, mask))
913 dev->dev.coherent_dma_mask = mask;
919 static int __devinit pci_init(void)
921 struct pci_dev *dev = NULL;
923 while ((dev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, dev)) != NULL) {
924 pci_fixup_device(pci_fixup_final, dev);
929 static int __devinit pci_setup(char *str)
932 char *k = strchr(str, ',');
935 if (*str && (str = pcibios_setup(str)) && *str) {
936 if (!strcmp(str, "nomsi")) {
939 printk(KERN_ERR "PCI: Unknown option `%s'\n",
948 device_initcall(pci_init);
950 __setup("pci=", pci_setup);
952 #if defined(CONFIG_ISA) || defined(CONFIG_EISA)
953 /* FIXME: Some boxes have multiple ISA bridges! */
954 struct pci_dev *isa_bridge;
955 EXPORT_SYMBOL(isa_bridge);
958 EXPORT_SYMBOL_GPL(pci_restore_bars);
959 EXPORT_SYMBOL(pci_enable_device_bars);
960 EXPORT_SYMBOL(pci_enable_device);
961 EXPORT_SYMBOL(pci_disable_device);
962 EXPORT_SYMBOL(pci_find_capability);
963 EXPORT_SYMBOL(pci_bus_find_capability);
964 EXPORT_SYMBOL(pci_release_regions);
965 EXPORT_SYMBOL(pci_request_regions);
966 EXPORT_SYMBOL(pci_release_region);
967 EXPORT_SYMBOL(pci_request_region);
968 EXPORT_SYMBOL(pci_set_master);
969 EXPORT_SYMBOL(pci_set_mwi);
970 EXPORT_SYMBOL(pci_clear_mwi);
971 EXPORT_SYMBOL_GPL(pci_intx);
972 EXPORT_SYMBOL(pci_set_dma_mask);
973 EXPORT_SYMBOL(pci_set_consistent_dma_mask);
974 EXPORT_SYMBOL(pci_assign_resource);
975 EXPORT_SYMBOL(pci_find_parent_resource);
977 EXPORT_SYMBOL(pci_set_power_state);
978 EXPORT_SYMBOL(pci_save_state);
979 EXPORT_SYMBOL(pci_restore_state);
980 EXPORT_SYMBOL(pci_enable_wake);
984 EXPORT_SYMBOL(isa_dma_bridge_buggy);
985 EXPORT_SYMBOL(pci_pci_problems);