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#include 

#include 

#include 

#include 

#define PCIBIOS_SUCCESSFUL      0x00

    .name   = "PCI IO",

    .start  = 0,

    .end    = IO_SPACE_LIMIT,

    .flags  = IORESOURCE_IO,

};

    .name   = "PCI mem",

    .start  = 0,

    .end    = -1,

    .flags  = IORESOURCE_MEM,

};

                   u8 pos, int cap, int *ttl)

{

    u8 id;

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

        if (pos < 0x40)

            break;

        pos &= ~3;

        pci_bus_read_config_byte(bus, devfn, pos + PCI_CAP_LIST_ID,

                     &id);

        if (id == 0xff)

            break;

        if (id == cap)

            return pos;

        pos += PCI_CAP_LIST_NEXT;

    }

    return 0;

}

                   u8 pos, int cap)

{

    int ttl = PCI_FIND_CAP_TTL;

}

static int __pci_bus_find_cap_start(struct pci_bus *bus,

                    unsigned int devfn, u8 hdr_type)

{

    u16 status;

    if (!(status & PCI_STATUS_CAP_LIST))

        return 0;

    case PCI_HEADER_TYPE_NORMAL:

    case PCI_HEADER_TYPE_BRIDGE:

        return PCI_CAPABILITY_LIST;

    case PCI_HEADER_TYPE_CARDBUS:

        return PCI_CB_CAPABILITY_LIST;

    default:

        return 0;

    }

}

 * 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

 *  %PCI_CAP_ID_EXP          PCI Express

 */

int pci_find_capability(struct pci_dev *dev, int cap)

{

    int pos;

    if (pos)

        pos = __pci_find_next_cap(dev->bus, dev->devfn, pos, cap);

}

{

    struct pci_bus *b;

    if (b) {

        INIT_LIST_HEAD(&b->node);

        INIT_LIST_HEAD(&b->children);

        INIT_LIST_HEAD(&b->devices);

        INIT_LIST_HEAD(&b->slots);

        INIT_LIST_HEAD(&b->resources);

    }

    return b;

}

{

    int error;

    struct pci_bus *b, *b2;

    if (!b)

        return NULL;

    b->ops = ops;

    if (b2) {

        /* If we already got to this bus through a different bridge, ignore it */

        dbgprintf("bus already known\n");

        goto err_out;

    }

    list_add_tail(&b->node, &pci_root_buses);

//    up_write(&pci_bus_sem);

    b->resource[0] = &ioport_resource;

    b->resource[1] = &iomem_resource;

    kfree(b);

    return NULL;

}

{

    struct pci_bus* child;

    struct list_head *tmp;

        return bus;

        child = pci_do_find_bus(pci_bus_b(tmp), busnr);

        if(child)

            return child;

    }

    return NULL;

}

 * pci_find_bus - locate PCI bus from a given domain and bus number

 * @domain: number of PCI domain to search

 * @busnr: number of desired PCI bus

 *

 * Given a PCI bus number and domain number, the desired PCI bus is located

 * in the global list of PCI buses.  If the bus is found, a pointer to its

 * data structure is returned.  If no bus is found, %NULL is returned.

 */

struct pci_bus * pci_find_bus(int domain, int busnr)

{

    struct pci_bus *bus = NULL;

    struct pci_bus *tmp_bus;

        if (pci_domain_nr(bus) != domain)

            continue;

        tmp_bus = pci_do_find_bus(bus, busnr);

        if (tmp_bus)

            return tmp_bus;

    }

    return NULL;

}

 * pci_find_next_bus - begin or continue searching for a PCI bus

 * @from: Previous PCI bus found, or %NULL for new search.

 *

 * Iterates through the list of known PCI busses.  A new search is

 * initiated by passing %NULL as the @from argument.  Otherwise if

 * @from is not %NULL, searches continue from next device on the

 * global list.

 */

struct pci_bus *

pci_find_next_bus(const struct pci_bus *from)

{

    struct list_head *n;

    struct pci_bus *b = NULL;

//    down_read(&pci_bus_sem);

    n = from ? from->node.next : pci_root_buses.next;

    if (n != &pci_root_buses)

        b = pci_bus_b(n);

//    up_read(&pci_bus_sem);

    return b;

}

 * pci_get_slot - locate PCI device for a given PCI slot

 * @bus: PCI bus on which desired PCI device resides

 * @devfn: encodes number of PCI slot in which the desired PCI

 * device resides and the logical device number within that slot

 * in case of multi-function devices.

 *

 * Given a PCI bus and slot/function number, the desired PCI device

 * is located in the list of PCI devices.

 * If the device is found, its reference count is increased and this

 * function returns a pointer to its data structure.  The caller must

 * decrement the reference count by calling pci_dev_put().

 * If no device is found, %NULL is returned.

 */

struct pci_dev * pci_get_slot(struct pci_bus *bus, unsigned int devfn)

{

    struct list_head *tmp;

    struct pci_dev *dev;

//    down_read(&pci_bus_sem);

        dev = pci_dev_b(tmp);

        if (dev->devfn == devfn)

            goto out;

    }

 out:

//    pci_dev_get(dev);

//    up_read(&pci_bus_sem);

    return dev;

}

 * pci_find_ext_capability - Find an extended capability

 * @dev: PCI device to query

 * @cap: capability code

 *

 * Returns the address of the requested extended capability structure

 * within the device's PCI configuration space or 0 if the device does

 * not support it.  Possible values for @cap:

 *

 *  %PCI_EXT_CAP_ID_ERR     Advanced Error Reporting

 *  %PCI_EXT_CAP_ID_VC      Virtual Channel

 *  %PCI_EXT_CAP_ID_DSN     Device Serial Number

 *  %PCI_EXT_CAP_ID_PWR     Power Budgeting

 */

int pci_find_ext_capability(struct pci_dev *dev, int cap)

{

    u32 header;

    int ttl;

    int pos = PCI_CFG_SPACE_SIZE;

    ttl = (PCI_CFG_SPACE_EXP_SIZE - PCI_CFG_SPACE_SIZE) / 8;

        return 0;

        return 0;

     * If we have no capabilities, this is indicated by cap ID,

     * cap version and next pointer all being 0.

     */

    if (header == 0)

        return 0;

        if (PCI_EXT_CAP_ID(header) == cap)

            return pos;

        if (pos < PCI_CFG_SPACE_SIZE)

            break;

            break;

    }

}