Subversion Repositories shark

/*

 *      $Id: pci.c,v 1.7 2004-04-25 12:07:34 giacomo Exp $

 *

 *      PCI Bus Services, see include/linux/pci.h for further explanation.

 *

 *      Copyright 1993 -- 1997 Drew Eckhardt, Frederic Potter,

 *      David Mosberger-Tang

 *

 *      Copyright 1997 -- 2000 Martin Mares <mj@ucw.cz>

 */

#include <linuxcomp.h>

#include <linux/delay.h>

#include <linux/init.h>

#include <linux/pci.h>

#include <linux/module.h>

#include <linux/spinlock.h>

#include <asm/dma.h>    /* isa_dma_bridge_buggy */

//#define DEBUG

#ifdef DEBUG

#define DBG(x...) printk(x)

#else

#define DBG(x...)

#endif

/**

 * pci_bus_max_busnr - returns maximum PCI bus number of given bus' children

 * @bus: pointer to PCI bus structure to search

 *

 * Given a PCI bus, returns the highest PCI bus number present in the set

 * including the given PCI bus and its list of child PCI buses.

 */

unsigned char __devinit

pci_bus_max_busnr(struct pci_bus* bus)

{

        struct list_head *tmp;

        unsigned char max, n;

        max = bus->number;

        list_for_each(tmp, &bus->children) {

                n = pci_bus_max_busnr(pci_bus_b(tmp));

                if(n > max)

                        max = n;

        }

        return max;

}

/**

 * pci_max_busnr - returns maximum PCI bus number

 *

 * Returns the highest PCI bus number present in the system global list of

 * PCI buses.

 */

unsigned char __devinit

pci_max_busnr(void)

{

        struct pci_bus *bus = NULL;

        unsigned char max, n;

        max = 0;

        while ((bus = pci_find_next_bus(bus)) != NULL) {

                n = pci_bus_max_busnr(bus);

                if(n > max)

                        max = n;

        }

        return max;

}

/**

 * pci_find_capability - query for devices' capabilities

 * @dev: PCI device to query

 * @cap: capability code

 *

 * Tell if a device supports a given PCI capability.

 * Returns the address of the requested capability structure within the

 * device's PCI configuration space or 0 in case the device does not

 * support it.  Possible values for @cap:

 *

 *  %PCI_CAP_ID_PM           Power Management

 *

 *  %PCI_CAP_ID_AGP          Accelerated Graphics Port

 *

 *  %PCI_CAP_ID_VPD          Vital Product Data

 *

 *  %PCI_CAP_ID_SLOTID       Slot Identification

 *

 *  %PCI_CAP_ID_MSI          Message Signalled Interrupts

 *

 *  %PCI_CAP_ID_CHSWP        CompactPCI HotSwap

 *

 *  %PCI_CAP_ID_PCIX         PCI-X

 */

int

pci_find_capability(struct pci_dev *dev, int cap)

{

        u16 status;

        u8 pos, id;

        int ttl = 48;

        pci_read_config_word(dev, PCI_STATUS, &status);

        if (!(status & PCI_STATUS_CAP_LIST))

                return 0;

        switch (dev->hdr_type) {

        case PCI_HEADER_TYPE_NORMAL:

        case PCI_HEADER_TYPE_BRIDGE:

                pci_read_config_byte(dev, PCI_CAPABILITY_LIST, &pos);

                break;

        case PCI_HEADER_TYPE_CARDBUS:

                pci_read_config_byte(dev, PCI_CB_CAPABILITY_LIST, &pos);

                break;

        default:

                return 0;

        }

        while (ttl-- && pos >= 0x40) {

                pos &= ~3;

                pci_read_config_byte(dev, pos + PCI_CAP_LIST_ID, &id);

                if (id == 0xff)

                        break;

                if (id == cap)

                        return pos;

                pci_read_config_byte(dev, pos + PCI_CAP_LIST_NEXT, &pos);

        }

        return 0;

}

/**

 * pci_bus_find_capability - query for devices' capabilities

 * @bus:   the PCI bus to query

 * @devfn: PCI device to query

 * @cap:   capability code

 *

 * Like pci_find_capability() but works for pci devices that do not have a

 * pci_dev structure set up yet.

 *

 * Returns the address of the requested capability structure within the

 * device's PCI configuration space or 0 in case the device does not

 * support it.

 */

int pci_bus_find_capability(struct pci_bus *bus, unsigned int devfn, int cap)

{

        u16 status;

        u8 pos, id;

        int ttl = 48;

        struct pci_dev *dev = bus->self;

        pci_bus_read_config_word(bus, devfn, PCI_STATUS, &status);

        if (!(status & PCI_STATUS_CAP_LIST))

                return 0;

        switch (dev->hdr_type) {

        case PCI_HEADER_TYPE_NORMAL:

        case PCI_HEADER_TYPE_BRIDGE:

                pci_bus_read_config_byte(bus, devfn, PCI_CAPABILITY_LIST, &pos);

                break;

        case PCI_HEADER_TYPE_CARDBUS:

                pci_bus_read_config_byte(bus, devfn, PCI_CB_CAPABILITY_LIST, &pos);

                break;

        default:

                return 0;

        }

        while (ttl-- && pos >= 0x40) {

                pos &= ~3;

                pci_bus_read_config_byte(bus, devfn, pos + PCI_CAP_LIST_ID, &id);

                if (id == 0xff)

                        break;

                if (id == cap)

                        return pos;

                pci_bus_read_config_byte(bus, devfn, pos + PCI_CAP_LIST_NEXT, &pos);

        }

        return 0;

}

/**

 * pci_find_parent_resource - return resource region of parent bus of given region

 * @dev: PCI device structure contains resources to be searched

 * @res: child resource record for which parent is sought

 *

 *  For given resource region of given device, return the resource

 *  region of parent bus the given region is contained in or where

 *  it should be allocated from.

 */

struct resource *

pci_find_parent_resource(const struct pci_dev *dev, struct resource *res)

{

        const struct pci_bus *bus = dev->bus;

        int i;

        struct resource *best = NULL;

        for(i = 0; i < PCI_BUS_NUM_RESOURCES; i++) {

                struct resource *r = bus->resource[i];

                if (!r)

                        continue;

                if (res->start && !(res->start >= r->start && res->end <= r->end))

                        continue;       /* Not contained */

                if ((res->flags ^ r->flags) & (IORESOURCE_IO | IORESOURCE_MEM))

                        continue;       /* Wrong type */

                if (!((res->flags ^ r->flags) & IORESOURCE_PREFETCH))

                        return r;       /* Exact match */

                if ((res->flags & IORESOURCE_PREFETCH) && !(r->flags & IORESOURCE_PREFETCH))

                        best = r;       /* Approximating prefetchable by non-prefetchable */

        }

        return best;

}

/**

 * pci_set_power_state - Set the power state of a PCI device

 * @dev: PCI device to be suspended

 * @state: Power state we're entering

 *

 * Transition a device to a new power state, using the Power Management

 * Capabilities in the device's config space.

 *

 * RETURN VALUE:

 * -EINVAL if trying to enter a lower state than we're already in.

 * 0 if we're already in the requested state.

 * -EIO if device does not support PCI PM.

 * 0 if we can successfully change the power state.

 */

int

pci_set_power_state(struct pci_dev *dev, int state)

{

        int pm;

        u16 pmcsr;

        /* bound the state we're entering */

        if (state > 3) state = 3;

        /* Validate current state:

         * Can enter D0 from any state, but if we can only go deeper

         * to sleep if we're already in a low power state

         */

        if (state > 0 && dev->current_state > state)

                return -EINVAL;

        else if (dev->current_state == state)

                return 0;        /* we're already there */

        /* find PCI PM capability in list */

        pm = pci_find_capability(dev, PCI_CAP_ID_PM);

        /* abort if the device doesn't support PM capabilities */

        if (!pm) return -EIO;

        /* check if this device supports the desired state */

        if (state == 1 || state == 2) {

                u16 pmc;

                pci_read_config_word(dev,pm + PCI_PM_PMC,&pmc);

                if (state == 1 && !(pmc & PCI_PM_CAP_D1)) return -EIO;

                else if (state == 2 && !(pmc & PCI_PM_CAP_D2)) return -EIO;

        }

        /* If we're in D3, force entire word to 0.

         * This doesn't affect PME_Status, disables PME_En, and

         * sets PowerState to 0.

         */

        if (dev->current_state >= 3)

                pmcsr = 0;

        else {

                pci_read_config_word(dev, pm + PCI_PM_CTRL, &pmcsr);

                pmcsr &= ~PCI_PM_CTRL_STATE_MASK;

                pmcsr |= state;

        }

        /* enter specified state */

        pci_write_config_word(dev, pm + PCI_PM_CTRL, pmcsr);

        /* Mandatory power management transition delays */

        /* see PCI PM 1.1 5.6.1 table 18 */

        if(state == 3 || dev->current_state == 3)

        {

                //set_current_state(TASK_UNINTERRUPTIBLE);

                schedule_timeout(HZ/100);

        }

        else if(state == 2 || dev->current_state == 2)

                udelay(200);

        dev->current_state = state;

        return 0;

}

/**

 * pci_save_state - save the PCI configuration space of a device before suspending

 * @dev: - PCI device that we're dealing with

 * @buffer: - buffer to hold config space context

 *

 * @buffer must be large enough to hold the entire PCI 2.2 config space

 * (>= 64 bytes).

 */

int

pci_save_state(struct pci_dev *dev, u32 *buffer)

{

        int i;

        if (buffer) {

                /* XXX: 100% dword access ok here? */

                for (i = 0; i < 16; i++)

                        pci_read_config_dword(dev, i * 4,&buffer[i]);

        }

        return 0;

}

/**

 * pci_restore_state - Restore the saved state of a PCI device

 * @dev: - PCI device that we're dealing with

 * @buffer: - saved PCI config space

 *

 */

int

pci_restore_state(struct pci_dev *dev, u32 *buffer)

{

        int i;

        if (buffer) {

                for (i = 0; i < 16; i++)

                        pci_write_config_dword(dev,i * 4, buffer[i]);

        }

        /*

         * otherwise, write the context information we know from bootup.

         * This works around a problem where warm-booting from Windows

         * combined with a D3(hot)->D0 transition causes PCI config

         * header data to be forgotten.

         */    

        else {

                for (i = 0; i < 6; i ++)

                        pci_write_config_dword(dev,

                                               PCI_BASE_ADDRESS_0 + (i * 4),

                                               dev->resource[i].start);

                pci_write_config_byte(dev, PCI_INTERRUPT_LINE, dev->irq);

        }

        return 0;

}

/**

 * pci_enable_device_bars - Initialize some of a device for use

 * @dev: PCI device to be initialized

 * @bars: bitmask of BAR's that must be configured

 *

 *  Initialize device before it's used by a driver. Ask low-level code

 *  to enable selected I/O and memory resources. Wake up the device if it

 *  was suspended. Beware, this function can fail.

 */

int

pci_enable_device_bars(struct pci_dev *dev, int bars)

{

        int err;

        pci_set_power_state(dev, 0);

        if ((err = pcibios_enable_device(dev, bars)) < 0)

                return err;

        return 0;

}

/**

 * pci_enable_device - Initialize device before it's used by a driver.

 * @dev: PCI device to be initialized

 *

 *  Initialize device before it's used by a driver. Ask low-level code

 *  to enable I/O and memory. Wake up the device if it was suspended.

 *  Beware, this function can fail.

 */

int

pci_enable_device(struct pci_dev *dev)

{

        return pci_enable_device_bars(dev, (1 << PCI_NUM_RESOURCES) - 1);

}

/**

 * pci_disable_device - Disable PCI device after use

 * @dev: PCI device to be disabled

 *

 * Signal to the system that the PCI device is not in use by the system

 * anymore.  This only involves disabling PCI bus-mastering, if active.

 */

void

pci_disable_device(struct pci_dev *dev)

{

        u16 pci_command;

        pci_read_config_word(dev, PCI_COMMAND, &pci_command);

        if (pci_command & PCI_COMMAND_MASTER) {

                pci_command &= ~PCI_COMMAND_MASTER;

                pci_write_config_word(dev, PCI_COMMAND, pci_command);

        }

}

/**

 * pci_enable_wake - enable device to generate PME# when suspended

 * @dev: - PCI device to operate on

 * @state: - Current state of device.

 * @enable: - Flag to enable or disable generation

 *

 * Set the bits in the device's PM Capabilities to generate PME# when

 * the system is suspended.

 *

 * -EIO is returned if device doesn't have PM Capabilities.

 * -EINVAL is returned if device supports it, but can't generate wake events.

 * 0 if operation is successful.

 *

 */

int pci_enable_wake(struct pci_dev *dev, u32 state, int enable)

{

        int pm;

        u16 value;

        /* find PCI PM capability in list */

        pm = pci_find_capability(dev, PCI_CAP_ID_PM);

        /* If device doesn't support PM Capabilities, but request is to disable

         * wake events, it's a nop; otherwise fail */

        if (!pm)

                return enable ? -EIO : 0;

        /* Check device's ability to generate PME# */

        pci_read_config_word(dev,pm+PCI_PM_PMC,&value);

        value &= PCI_PM_CAP_PME_MASK;

        value >>= ffs(value);   /* First bit of mask */

        /* Check if it can generate PME# from requested state. */

        if (!value || !(value & (1 << state)))

                return enable ? -EINVAL : 0;

        pci_read_config_word(dev, pm + PCI_PM_CTRL, &value);

        /* Clear PME_Status by writing 1 to it and enable PME# */

        value |= PCI_PM_CTRL_PME_STATUS | PCI_PM_CTRL_PME_ENABLE;

        if (!enable)

                value &= ~PCI_PM_CTRL_PME_ENABLE;

        pci_write_config_word(dev, pm + PCI_PM_CTRL, value);

        return 0;

}

int

pci_get_interrupt_pin(struct pci_dev *dev, struct pci_dev **bridge)

{

        u8 pin;

        pci_read_config_byte(dev, PCI_INTERRUPT_PIN, &pin);

        if (!pin)

                return -1;

        pin--;

        while (dev->bus->self) {

                pin = (pin + PCI_SLOT(dev->devfn)) % 4;

                dev = dev->bus->self;

        }

        *bridge = dev;

        return pin;

}

/**

 *      pci_release_region - Release a PCI bar

 *      @pdev: PCI device whose resources were previously reserved by pci_request_region

 *      @bar: BAR to release

 *

 *      Releases the PCI I/O and memory resources previously reserved by a

 *      successful call to pci_request_region.  Call this function only

 *      after all use of the PCI regions has ceased.

 */

void pci_release_region(struct pci_dev *pdev, int bar)

{

        if (pci_resource_len(pdev, bar) == 0)

                return;

        if (pci_resource_flags(pdev, bar) & IORESOURCE_IO)

                release_region(pci_resource_start(pdev, bar),

                                pci_resource_len(pdev, bar));

        else if (pci_resource_flags(pdev, bar) & IORESOURCE_MEM)

                release_mem_region(pci_resource_start(pdev, bar),

                                pci_resource_len(pdev, bar));

}

/**

 *      pci_request_region - Reserved PCI I/O and memory resource

 *      @pdev: PCI device whose resources are to be reserved

 *      @bar: BAR to be reserved

 *      @res_name: Name to be associated with resource.

 *

 *      Mark the PCI region associated with PCI device @pdev BR @bar as

 *      being reserved by owner @res_name.  Do not access any

 *      address inside the PCI regions unless this call returns

 *      successfully.

 *

 *      Returns 0 on success, or %EBUSY on error.  A warning

 *      message is also printed on failure.

 */

int pci_request_region(struct pci_dev *pdev, int bar, char *res_name)

{

        if (pci_resource_len(pdev, bar) == 0)

                return 0;

        if (pci_resource_flags(pdev, bar) & IORESOURCE_IO) {

                if (!request_region(pci_resource_start(pdev, bar),

                            pci_resource_len(pdev, bar), res_name))

                        goto err_out;

        }

        else if (pci_resource_flags(pdev, bar) & IORESOURCE_MEM) {

                if (!request_mem_region(pci_resource_start(pdev, bar),

                                        pci_resource_len(pdev, bar), res_name))

                        goto err_out;

        }

        return 0;

err_out:

        printk (KERN_WARNING "PCI: Unable to reserve %s region #%d:%lx@%lx for device %s\n",

                pci_resource_flags(pdev, bar) & IORESOURCE_IO ? "I/O" : "mem",

                bar + 1, /* PCI BAR # */

                pci_resource_len(pdev, bar), pci_resource_start(pdev, bar),

                pci_name(pdev));

        return -EBUSY;

}

/**

 *      pci_release_regions - Release reserved PCI I/O and memory resources

 *      @pdev: PCI device whose resources were previously reserved by pci_request_regions

 *

 *      Releases all PCI I/O and memory resources previously reserved by a

 *      successful call to pci_request_regions.  Call this function only

 *      after all use of the PCI regions has ceased.

 */

void pci_release_regions(struct pci_dev *pdev)

{

        int i;

        for (i = 0; i < 6; i++)

                pci_release_region(pdev, i);

}

/**

 *      pci_request_regions - Reserved PCI I/O and memory resources

 *      @pdev: PCI device whose resources are to be reserved

 *      @res_name: Name to be associated with resource.

 *

 *      Mark all PCI regions associated with PCI device @pdev as

 *      being reserved by owner @res_name.  Do not access any

 *      address inside the PCI regions unless this call returns

 *      successfully.

 *

 *      Returns 0 on success, or %EBUSY on error.  A warning

 *      message is also printed on failure.

 */

int pci_request_regions(struct pci_dev *pdev, char *res_name)

{

        int i;

        for (i = 0; i < 6; i++)

                if(pci_request_region(pdev, i, res_name))

                        goto err_out;

        return 0;

err_out:

        printk (KERN_WARNING "PCI: Unable to reserve %s region #%d:%lx@%lx for device %s\n",

                pci_resource_flags(pdev, i) & IORESOURCE_IO ? "I/O" : "mem",

                i + 1, /* PCI BAR # */

                pci_resource_len(pdev, i), pci_resource_start(pdev, i),

                pci_name(pdev));

        while(--i >= 0)

                pci_release_region(pdev, i);

        return -EBUSY;

}

/**

 * pci_set_master - enables bus-mastering for device dev

 * @dev: the PCI device to enable

 *

 * Enables bus-mastering on the device and calls pcibios_set_master()

 * to do the needed arch specific settings.

 */

void

pci_set_master(struct pci_dev *dev)

{

        u16 cmd;

        pci_read_config_word(dev, PCI_COMMAND, &cmd);

        if (! (cmd & PCI_COMMAND_MASTER)) {

                DBG("PCI: Enabling bus mastering for device %s\n", pci_name(dev));

                cmd |= PCI_COMMAND_MASTER;

                pci_write_config_word(dev, PCI_COMMAND, cmd);

        }

        pcibios_set_master(dev);

}

#ifndef HAVE_ARCH_PCI_MWI

/* This can be overridden by arch code. */

u8 pci_cache_line_size = L1_CACHE_BYTES >> 2;

/**

 * pci_generic_prep_mwi - helper function for pci_set_mwi

 * @dev: the PCI device for which MWI is enabled

 *

 * Helper function for generic implementation of pcibios_prep_mwi

 * function.  Originally copied from drivers/net/acenic.c.

 * Copyright 1998-2001 by Jes Sorensen, <jes@trained-monkey.org>.

 *

 * RETURNS: An appropriate -ERRNO error value on error, or zero for success.

 */

static int

pci_generic_prep_mwi(struct pci_dev *dev)

{

        u8 cacheline_size;

        if (!pci_cache_line_size)

                return -EINVAL;         /* The system doesn't support MWI. */

        /* Validate current setting: the PCI_CACHE_LINE_SIZE must be

           equal to or multiple of the right value. */

        pci_read_config_byte(dev, PCI_CACHE_LINE_SIZE, &cacheline_size);

        if (cacheline_size >= pci_cache_line_size &&

            (cacheline_size % pci_cache_line_size) == 0)

                return 0;

        /* Write the correct value. */

        pci_write_config_byte(dev, PCI_CACHE_LINE_SIZE, pci_cache_line_size);

        /* Read it back. */

        pci_read_config_byte(dev, PCI_CACHE_LINE_SIZE, &cacheline_size);

        if (cacheline_size == pci_cache_line_size)

                return 0;

        printk(KERN_WARNING "PCI: cache line size of %d is not supported "

               "by device %s\n", pci_cache_line_size << 2, pci_name(dev));

        return -EINVAL;

}

#endif /* !HAVE_ARCH_PCI_MWI */

/**

 * pci_set_mwi - enables memory-write-invalidate PCI transaction

 * @dev: the PCI device for which MWI is enabled

 *

 * Enables the Memory-Write-Invalidate transaction in %PCI_COMMAND,

 * and then calls @pcibios_set_mwi to do the needed arch specific

 * operations or a generic mwi-prep function.

 *

 * RETURNS: An appropriate -ERRNO error value on error, or zero for success.

 */

int

pci_set_mwi(struct pci_dev *dev)

{

        int rc;

        u16 cmd;

#ifdef HAVE_ARCH_PCI_MWI

        rc = pcibios_prep_mwi(dev);

#else

        rc = pci_generic_prep_mwi(dev);

#endif

        if (rc)

                return rc;

        pci_read_config_word(dev, PCI_COMMAND, &cmd);

        if (! (cmd & PCI_COMMAND_INVALIDATE)) {

                DBG("PCI: Enabling Mem-Wr-Inval for device %s\n", pci_name(dev));

                cmd |= PCI_COMMAND_INVALIDATE;

                pci_write_config_word(dev, PCI_COMMAND, cmd);

        }

        return 0;

}

/**

 * pci_clear_mwi - disables Memory-Write-Invalidate for device dev

 * @dev: the PCI device to disable

 *

 * Disables PCI Memory-Write-Invalidate transaction on the device

 */

void

pci_clear_mwi(struct pci_dev *dev)

{

        u16 cmd;

        pci_read_config_word(dev, PCI_COMMAND, &cmd);

        if (cmd & PCI_COMMAND_INVALIDATE) {

                cmd &= ~PCI_COMMAND_INVALIDATE;

                pci_write_config_word(dev, PCI_COMMAND, cmd);

        }

}

int

pci_set_dma_mask(struct pci_dev *dev, u64 mask)

{

        if (!pci_dma_supported(dev, mask))

                return -EIO;

        dev->dma_mask = mask;

        return 0;

}

int

pci_dac_set_dma_mask(struct pci_dev *dev, u64 mask)

{

        if (!pci_dac_dma_supported(dev, mask))

                return -EIO;

        dev->dma_mask = mask;

        return 0;

}

int

pci_set_consistent_dma_mask(struct pci_dev *dev, u64 mask)

{

        if (!pci_dma_supported(dev, mask))

                return -EIO;

        dev->consistent_dma_mask = mask;

        return 0;

}

int __devinit pci_init(void)

{

        struct pci_dev *dev = NULL;

        while ((dev = pci_find_device(PCI_ANY_ID, PCI_ANY_ID, dev)) != NULL) {

                pci_fixup_device(PCI_FIXUP_FINAL, dev);

        }

        return 0;

}

static int __devinit pci_setup(char *str)

{

        while (str) {

                char *k = strchr(str, ',');

                if (k)

                        *k++ = 0;

                if (*str && (str = pcibios_setup(str)) && *str) {

                        /* PCI layer options should be handled here */

                        printk(KERN_ERR "PCI: Unknown option `%s'\n", str);

                }

                str = k;

        }

        return 1;

}

device_initcall(pci_init);

__setup("pci=", pci_setup);

#if defined(CONFIG_ISA) || defined(CONFIG_EISA)

/* FIXME: Some boxes have multiple ISA bridges! */

struct pci_dev *isa_bridge;

EXPORT_SYMBOL(isa_bridge);

#endif

EXPORT_SYMBOL(pci_enable_device_bars);

EXPORT_SYMBOL(pci_enable_device);

EXPORT_SYMBOL(pci_disable_device);

EXPORT_SYMBOL(pci_max_busnr);

EXPORT_SYMBOL(pci_bus_max_busnr);

EXPORT_SYMBOL(pci_find_capability);

EXPORT_SYMBOL(pci_bus_find_capability);

EXPORT_SYMBOL(pci_release_regions);

EXPORT_SYMBOL(pci_request_regions);

EXPORT_SYMBOL(pci_release_region);

EXPORT_SYMBOL(pci_request_region);

EXPORT_SYMBOL(pci_set_master);

EXPORT_SYMBOL(pci_set_mwi);

EXPORT_SYMBOL(pci_clear_mwi);

EXPORT_SYMBOL(pci_set_dma_mask);

EXPORT_SYMBOL(pci_dac_set_dma_mask);

EXPORT_SYMBOL(pci_set_consistent_dma_mask);

EXPORT_SYMBOL(pci_assign_resource);

EXPORT_SYMBOL(pci_find_parent_resource);

EXPORT_SYMBOL(pci_set_power_state);

EXPORT_SYMBOL(pci_save_state);

EXPORT_SYMBOL(pci_restore_state);

EXPORT_SYMBOL(pci_enable_wake);

/* Quirk info */

EXPORT_SYMBOL(isa_dma_bridge_buggy);

EXPORT_SYMBOL(pci_pci_problems);