[PATCH] PCI: MSI(X) save/restore for suspend/resume

[linux-2.6/verdex.git] / include / linux / pci.h

/*
 *      pci.h
 *
 *      PCI defines and function prototypes
 *      Copyright 1994, Drew Eckhardt
 *      Copyright 1997--1999 Martin Mares <mj@ucw.cz>
 *
 *      For more information, please consult the following manuals (look at
 *      http://www.pcisig.com/ for how to get them):
 *
 *      PCI BIOS Specification
 *      PCI Local Bus Specification
 *      PCI to PCI Bridge Specification
 *      PCI System Design Guide
 */

#ifndef LINUX_PCI_H
#define LINUX_PCI_H

#include <linux/mod_devicetable.h>

/* Include the pci register defines */
#include <linux/pci_regs.h>

/* Include the ID list */
#include <linux/pci_ids.h>

/*
 * The PCI interface treats multi-function devices as independent
 * devices.  The slot/function address of each device is encoded
 * in a single byte as follows:
 *
 *      7:3 = slot
 *      2:0 = function
 */
#define PCI_DEVFN(slot,func)    ((((slot) & 0x1f) << 3) | ((func) & 0x07))
#define PCI_SLOT(devfn)         (((devfn) >> 3) & 0x1f)
#define PCI_FUNC(devfn)         ((devfn) & 0x07)

/* Ioctls for /proc/bus/pci/X/Y nodes. */
#define PCIIOC_BASE             ('P' << 24 | 'C' << 16 | 'I' << 8)
#define PCIIOC_CONTROLLER       (PCIIOC_BASE | 0x00)    /* Get controller for PCI device. */
#define PCIIOC_MMAP_IS_IO       (PCIIOC_BASE | 0x01)    /* Set mmap state to I/O space. */
#define PCIIOC_MMAP_IS_MEM      (PCIIOC_BASE | 0x02)    /* Set mmap state to MEM space. */
#define PCIIOC_WRITE_COMBINE    (PCIIOC_BASE | 0x03)    /* Enable/disable write-combining. */

#ifdef __KERNEL__

#include <linux/types.h>
#include <linux/config.h>
#include <linux/ioport.h>
#include <linux/list.h>
#include <linux/errno.h>
#include <linux/device.h>

/* File state for mmap()s on /proc/bus/pci/X/Y */
enum pci_mmap_state {
        pci_mmap_io,
        pci_mmap_mem
};

/* This defines the direction arg to the DMA mapping routines. */
#define PCI_DMA_BIDIRECTIONAL   0
#define PCI_DMA_TODEVICE        1
#define PCI_DMA_FROMDEVICE      2
#define PCI_DMA_NONE            3

#define DEVICE_COUNT_COMPATIBLE 4
#define DEVICE_COUNT_RESOURCE   12

typedef int __bitwise pci_power_t;

#define PCI_D0          ((pci_power_t __force) 0)
#define PCI_D1          ((pci_power_t __force) 1)
#define PCI_D2          ((pci_power_t __force) 2)
#define PCI_D3hot       ((pci_power_t __force) 3)
#define PCI_D3cold      ((pci_power_t __force) 4)
#define PCI_UNKNOWN     ((pci_power_t __force) 5)
#define PCI_POWER_ERROR ((pci_power_t __force) -1)

/** The pci_channel state describes connectivity between the CPU and
 *  the pci device.  If some PCI bus between here and the pci device
 *  has crashed or locked up, this info is reflected here.
 */
typedef unsigned int __bitwise pci_channel_state_t;

enum pci_channel_state {
        /* I/O channel is in normal state */
        pci_channel_io_normal = (__force pci_channel_state_t) 1,

        /* I/O to channel is blocked */
        pci_channel_io_frozen = (__force pci_channel_state_t) 2,

        /* PCI card is dead */
        pci_channel_io_perm_failure = (__force pci_channel_state_t) 3,
};

typedef unsigned short __bitwise pci_bus_flags_t;
enum pci_bus_flags {
        PCI_BUS_FLAGS_NO_MSI = (pci_bus_flags_t) 1,
};

struct pci_cap_saved_state {
        struct hlist_node next;
        char cap_nr;
        u32 data[0];
};

/*
 * The pci_dev structure is used to describe PCI devices.
 */
struct pci_dev {
        struct list_head global_list;   /* node in list of all PCI devices */
        struct list_head bus_list;      /* node in per-bus list */
        struct pci_bus  *bus;           /* bus this device is on */
        struct pci_bus  *subordinate;   /* bus this device bridges to */

        void            *sysdata;       /* hook for sys-specific extension */
        struct proc_dir_entry *procent; /* device entry in /proc/bus/pci */

        unsigned int    devfn;          /* encoded device & function index */
        unsigned short  vendor;
        unsigned short  device;
        unsigned short  subsystem_vendor;
        unsigned short  subsystem_device;
        unsigned int    class;          /* 3 bytes: (base,sub,prog-if) */
        u8              hdr_type;       /* PCI header type (`multi' flag masked out) */
        u8              rom_base_reg;   /* which config register controls the ROM */
        u8              pin;            /* which interrupt pin this device uses */

        struct pci_driver *driver;      /* which driver has allocated this device */
        u64             dma_mask;       /* Mask of the bits of bus address this
                                           device implements.  Normally this is
                                           0xffffffff.  You only need to change
                                           this if your device has broken DMA
                                           or supports 64-bit transfers.  */

        pci_power_t     current_state;  /* Current operating state. In ACPI-speak,
                                           this is D0-D3, D0 being fully functional,
                                           and D3 being off. */

        pci_channel_state_t error_state;        /* current connectivity state */
        struct  device  dev;            /* Generic device interface */

        /* device is compatible with these IDs */
        unsigned short vendor_compatible[DEVICE_COUNT_COMPATIBLE];
        unsigned short device_compatible[DEVICE_COUNT_COMPATIBLE];

        int             cfg_size;       /* Size of configuration space */

        /*
         * Instead of touching interrupt line and base address registers
         * directly, use the values stored here. They might be different!
         */
        unsigned int    irq;
        struct resource resource[DEVICE_COUNT_RESOURCE]; /* I/O and memory regions + expansion ROMs */

        /* These fields are used by common fixups */
        unsigned int    transparent:1;  /* Transparent PCI bridge */
        unsigned int    multifunction:1;/* Part of multi-function device */
        /* keep track of device state */
        unsigned int    is_enabled:1;   /* pci_enable_device has been called */
        unsigned int    is_busmaster:1; /* device is busmaster */
        unsigned int    no_msi:1;       /* device may not use msi */
        unsigned int    block_ucfg_access:1;    /* userspace config space access is blocked */

        u32             saved_config_space[16]; /* config space saved at suspend time */
        struct hlist_head saved_cap_space;
        struct bin_attribute *rom_attr; /* attribute descriptor for sysfs ROM entry */
        int rom_attr_enabled;           /* has display of the rom attribute been enabled? */
        struct bin_attribute *res_attr[DEVICE_COUNT_RESOURCE]; /* sysfs file for resources */
};

#define pci_dev_g(n) list_entry(n, struct pci_dev, global_list)
#define pci_dev_b(n) list_entry(n, struct pci_dev, bus_list)
#define to_pci_dev(n) container_of(n, struct pci_dev, dev)
#define for_each_pci_dev(d) while ((d = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, d)) != NULL)

static inline struct pci_cap_saved_state *pci_find_saved_cap(
        struct pci_dev *pci_dev,char cap)
{
        struct pci_cap_saved_state *tmp;
        struct hlist_node *pos;

        hlist_for_each_entry(tmp, pos, &pci_dev->saved_cap_space, next) {
                if (tmp->cap_nr == cap)
                        return tmp;
        }
        return NULL;
}

static inline void pci_add_saved_cap(struct pci_dev *pci_dev,
        struct pci_cap_saved_state *new_cap)
{
        hlist_add_head(&new_cap->next, &pci_dev->saved_cap_space);
}

static inline void pci_remove_saved_cap(struct pci_cap_saved_state *cap)
{
        hlist_del(&cap->next);
}

/*
 *  For PCI devices, the region numbers are assigned this way:
 *
 *      0-5     standard PCI regions
 *      6       expansion ROM
 *      7-10    bridges: address space assigned to buses behind the bridge
 */

#define PCI_ROM_RESOURCE        6
#define PCI_BRIDGE_RESOURCES    7
#define PCI_NUM_RESOURCES       11

#ifndef PCI_BUS_NUM_RESOURCES
#define PCI_BUS_NUM_RESOURCES   8
#endif

#define PCI_REGION_FLAG_MASK    0x0fU   /* These bits of resource flags tell us the PCI region flags */

struct pci_bus {
        struct list_head node;          /* node in list of buses */
        struct pci_bus  *parent;        /* parent bus this bridge is on */
        struct list_head children;      /* list of child buses */
        struct list_head devices;       /* list of devices on this bus */
        struct pci_dev  *self;          /* bridge device as seen by parent */
        struct resource *resource[PCI_BUS_NUM_RESOURCES];
                                        /* address space routed to this bus */

        struct pci_ops  *ops;           /* configuration access functions */
        void            *sysdata;       /* hook for sys-specific extension */
        struct proc_dir_entry *procdir; /* directory entry in /proc/bus/pci */

        unsigned char   number;         /* bus number */
        unsigned char   primary;        /* number of primary bridge */
        unsigned char   secondary;      /* number of secondary bridge */
        unsigned char   subordinate;    /* max number of subordinate buses */

        char            name[48];

        unsigned short  bridge_ctl;     /* manage NO_ISA/FBB/et al behaviors */
        pci_bus_flags_t bus_flags;      /* Inherited by child busses */
        struct device           *bridge;
        struct class_device     class_dev;
        struct bin_attribute    *legacy_io; /* legacy I/O for this bus */
        struct bin_attribute    *legacy_mem; /* legacy mem */
};

#define pci_bus_b(n)    list_entry(n, struct pci_bus, node)
#define to_pci_bus(n)   container_of(n, struct pci_bus, class_dev)

/*
 * Error values that may be returned by PCI functions.
 */
#define PCIBIOS_SUCCESSFUL              0x00
#define PCIBIOS_FUNC_NOT_SUPPORTED      0x81
#define PCIBIOS_BAD_VENDOR_ID           0x83
#define PCIBIOS_DEVICE_NOT_FOUND        0x86
#define PCIBIOS_BAD_REGISTER_NUMBER     0x87
#define PCIBIOS_SET_FAILED              0x88
#define PCIBIOS_BUFFER_TOO_SMALL        0x89

/* Low-level architecture-dependent routines */

struct pci_ops {
        int (*read)(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 *val);
        int (*write)(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 val);
};

struct pci_raw_ops {
        int (*read)(unsigned int domain, unsigned int bus, unsigned int devfn,
                    int reg, int len, u32 *val);
        int (*write)(unsigned int domain, unsigned int bus, unsigned int devfn,
                     int reg, int len, u32 val);
};

extern struct pci_raw_ops *raw_pci_ops;

struct pci_bus_region {
        unsigned long start;
        unsigned long end;
};

struct pci_dynids {
        spinlock_t lock;            /* protects list, index */
        struct list_head list;      /* for IDs added at runtime */
        unsigned int use_driver_data:1; /* pci_driver->driver_data is used */
};

/* ---------------------------------------------------------------- */
/** PCI Error Recovery System (PCI-ERS).  If a PCI device driver provides
 *  a set fof callbacks in struct pci_error_handlers, then that device driver
 *  will be notified of PCI bus errors, and will be driven to recovery
 *  when an error occurs.
 */

typedef unsigned int __bitwise pci_ers_result_t;

enum pci_ers_result {
        /* no result/none/not supported in device driver */
        PCI_ERS_RESULT_NONE = (__force pci_ers_result_t) 1,

        /* Device driver can recover without slot reset */
        PCI_ERS_RESULT_CAN_RECOVER = (__force pci_ers_result_t) 2,

        /* Device driver wants slot to be reset. */
        PCI_ERS_RESULT_NEED_RESET = (__force pci_ers_result_t) 3,

        /* Device has completely failed, is unrecoverable */
        PCI_ERS_RESULT_DISCONNECT = (__force pci_ers_result_t) 4,

        /* Device driver is fully recovered and operational */
        PCI_ERS_RESULT_RECOVERED = (__force pci_ers_result_t) 5,
};

/* PCI bus error event callbacks */
struct pci_error_handlers
{
        /* PCI bus error detected on this device */
        pci_ers_result_t (*error_detected)(struct pci_dev *dev,
                              enum pci_channel_state error);

        /* MMIO has been re-enabled, but not DMA */
        pci_ers_result_t (*mmio_enabled)(struct pci_dev *dev);

        /* PCI Express link has been reset */
        pci_ers_result_t (*link_reset)(struct pci_dev *dev);

        /* PCI slot has been reset */
        pci_ers_result_t (*slot_reset)(struct pci_dev *dev);

        /* Device driver may resume normal operations */
        void (*resume)(struct pci_dev *dev);
};

/* ---------------------------------------------------------------- */

struct module;
struct pci_driver {
        struct list_head node;
        char *name;
        const struct pci_device_id *id_table;   /* must be non-NULL for probe to be called */
        int  (*probe)  (struct pci_dev *dev, const struct pci_device_id *id);   /* New device inserted */
        void (*remove) (struct pci_dev *dev);   /* Device removed (NULL if not a hot-plug capable driver) */
        int  (*suspend) (struct pci_dev *dev, pm_message_t state);      /* Device suspended */
        int  (*resume) (struct pci_dev *dev);                   /* Device woken up */
        int  (*enable_wake) (struct pci_dev *dev, pci_power_t state, int enable);   /* Enable wake event */
        void (*shutdown) (struct pci_dev *dev);

        struct pci_error_handlers *err_handler;
        struct device_driver    driver;
        struct pci_dynids dynids;
};

#define to_pci_driver(drv) container_of(drv,struct pci_driver, driver)

/**
 * PCI_DEVICE - macro used to describe a specific pci device
 * @vend: the 16 bit PCI Vendor ID
 * @dev: the 16 bit PCI Device ID
 *
 * This macro is used to create a struct pci_device_id that matches a
 * specific device.  The subvendor and subdevice fields will be set to
 * PCI_ANY_ID.
 */
#define PCI_DEVICE(vend,dev) \
        .vendor = (vend), .device = (dev), \
        .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID

/**
 * PCI_DEVICE_CLASS - macro used to describe a specific pci device class
 * @dev_class: the class, subclass, prog-if triple for this device
 * @dev_class_mask: the class mask for this device
 *
 * This macro is used to create a struct pci_device_id that matches a
 * specific PCI class.  The vendor, device, subvendor, and subdevice
 * fields will be set to PCI_ANY_ID.
 */
#define PCI_DEVICE_CLASS(dev_class,dev_class_mask) \
        .class = (dev_class), .class_mask = (dev_class_mask), \
        .vendor = PCI_ANY_ID, .device = PCI_ANY_ID, \
        .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID

/*
 * pci_module_init is obsolete, this stays here till we fix up all usages of it
 * in the tree.
 */
#define pci_module_init pci_register_driver

/* these external functions are only available when PCI support is enabled */
#ifdef CONFIG_PCI

extern struct bus_type pci_bus_type;

/* Do NOT directly access these two variables, unless you are arch specific pci
 * code, or pci core code. */
extern struct list_head pci_root_buses; /* list of all known PCI buses */
extern struct list_head pci_devices;    /* list of all devices */

void pcibios_fixup_bus(struct pci_bus *);
int pcibios_enable_device(struct pci_dev *, int mask);
char *pcibios_setup (char *str);

/* Used only when drivers/pci/setup.c is used */
void pcibios_align_resource(void *, struct resource *,
                            unsigned long, unsigned long);
void pcibios_update_irq(struct pci_dev *, int irq);

/* Generic PCI functions used internally */

extern struct pci_bus *pci_find_bus(int domain, int busnr);
void pci_bus_add_devices(struct pci_bus *bus);
struct pci_bus *pci_scan_bus_parented(struct device *parent, int bus, struct pci_ops *ops, void *sysdata);
static inline struct pci_bus *pci_scan_bus(int bus, struct pci_ops *ops, void *sysdata)
{
        struct pci_bus *root_bus;
        root_bus = pci_scan_bus_parented(NULL, bus, ops, sysdata);
        if (root_bus)
                pci_bus_add_devices(root_bus);
        return root_bus;
}
struct pci_bus *pci_create_bus(struct device *parent, int bus, struct pci_ops *ops, void *sysdata);
struct pci_bus * pci_add_new_bus(struct pci_bus *parent, struct pci_dev *dev, int busnr);
int pci_scan_slot(struct pci_bus *bus, int devfn);
struct pci_dev * pci_scan_single_device(struct pci_bus *bus, int devfn);
void pci_device_add(struct pci_dev *dev, struct pci_bus *bus);
unsigned int pci_scan_child_bus(struct pci_bus *bus);
void pci_bus_add_device(struct pci_dev *dev);
void pci_read_bridge_bases(struct pci_bus *child);
struct resource *pci_find_parent_resource(const struct pci_dev *dev, struct resource *res);
int pci_get_interrupt_pin(struct pci_dev *dev, struct pci_dev **bridge);
extern struct pci_dev *pci_dev_get(struct pci_dev *dev);
extern void pci_dev_put(struct pci_dev *dev);
extern void pci_remove_bus(struct pci_bus *b);
extern void pci_remove_bus_device(struct pci_dev *dev);
void pci_setup_cardbus(struct pci_bus *bus);

/* Generic PCI functions exported to card drivers */

struct pci_dev *pci_find_device (unsigned int vendor, unsigned int device, const struct pci_dev *from);
struct pci_dev *pci_find_device_reverse (unsigned int vendor, unsigned int device, const struct pci_dev *from);
struct pci_dev *pci_find_slot (unsigned int bus, unsigned int devfn);
int pci_find_capability (struct pci_dev *dev, int cap);
int pci_find_next_capability (struct pci_dev *dev, u8 pos, int cap);
struct pci_bus * pci_find_next_bus(const struct pci_bus *from);

struct pci_dev *pci_get_device (unsigned int vendor, unsigned int device, struct pci_dev *from);
struct pci_dev *pci_get_subsys (unsigned int vendor, unsigned int device,
                                unsigned int ss_vendor, unsigned int ss_device,
                                struct pci_dev *from);
struct pci_dev *pci_get_slot (struct pci_bus *bus, unsigned int devfn);
struct pci_dev *pci_get_class (unsigned int class, struct pci_dev *from);
int pci_dev_present(const struct pci_device_id *ids);

int pci_bus_read_config_byte (struct pci_bus *bus, unsigned int devfn, int where, u8 *val);
int pci_bus_read_config_word (struct pci_bus *bus, unsigned int devfn, int where, u16 *val);
int pci_bus_read_config_dword (struct pci_bus *bus, unsigned int devfn, int where, u32 *val);
int pci_bus_write_config_byte (struct pci_bus *bus, unsigned int devfn, int where, u8 val);
int pci_bus_write_config_word (struct pci_bus *bus, unsigned int devfn, int where, u16 val);
int pci_bus_write_config_dword (struct pci_bus *bus, unsigned int devfn, int where, u32 val);

static inline int pci_read_config_byte(struct pci_dev *dev, int where, u8 *val)
{
        return pci_bus_read_config_byte (dev->bus, dev->devfn, where, val);
}
static inline int pci_read_config_word(struct pci_dev *dev, int where, u16 *val)
{
        return pci_bus_read_config_word (dev->bus, dev->devfn, where, val);
}
static inline int pci_read_config_dword(struct pci_dev *dev, int where, u32 *val)
{
        return pci_bus_read_config_dword (dev->bus, dev->devfn, where, val);
}
static inline int pci_write_config_byte(struct pci_dev *dev, int where, u8 val)
{
        return pci_bus_write_config_byte (dev->bus, dev->devfn, where, val);
}
static inline int pci_write_config_word(struct pci_dev *dev, int where, u16 val)
{
        return pci_bus_write_config_word (dev->bus, dev->devfn, where, val);
}
static inline int pci_write_config_dword(struct pci_dev *dev, int where, u32 val)
{
        return pci_bus_write_config_dword (dev->bus, dev->devfn, where, val);
}

int pci_enable_device(struct pci_dev *dev);
int pci_enable_device_bars(struct pci_dev *dev, int mask);
void pci_disable_device(struct pci_dev *dev);
void pci_set_master(struct pci_dev *dev);
#define HAVE_PCI_SET_MWI
int pci_set_mwi(struct pci_dev *dev);
void pci_clear_mwi(struct pci_dev *dev);
void pci_intx(struct pci_dev *dev, int enable);
int pci_set_dma_mask(struct pci_dev *dev, u64 mask);
int pci_set_consistent_dma_mask(struct pci_dev *dev, u64 mask);
void pci_update_resource(struct pci_dev *dev, struct resource *res, int resno);
int pci_assign_resource(struct pci_dev *dev, int i);
void pci_restore_bars(struct pci_dev *dev);

/* ROM control related routines */
void __iomem __must_check *pci_map_rom(struct pci_dev *pdev, size_t *size);
void __iomem __must_check *pci_map_rom_copy(struct pci_dev *pdev, size_t *size);
void pci_unmap_rom(struct pci_dev *pdev, void __iomem *rom);
void pci_remove_rom(struct pci_dev *pdev);

/* Power management related routines */
int pci_save_state(struct pci_dev *dev);
int pci_restore_state(struct pci_dev *dev);
int pci_set_power_state(struct pci_dev *dev, pci_power_t state);
pci_power_t pci_choose_state(struct pci_dev *dev, pm_message_t state);
int pci_enable_wake(struct pci_dev *dev, pci_power_t state, int enable);

/* Helper functions for low-level code (drivers/pci/setup-[bus,res].c) */
void pci_bus_assign_resources(struct pci_bus *bus);
void pci_bus_size_bridges(struct pci_bus *bus);
int pci_claim_resource(struct pci_dev *, int);
void pci_assign_unassigned_resources(void);
void pdev_enable_device(struct pci_dev *);
void pdev_sort_resources(struct pci_dev *, struct resource_list *);
void pci_fixup_irqs(u8 (*)(struct pci_dev *, u8 *),
                    int (*)(struct pci_dev *, u8, u8));
#define HAVE_PCI_REQ_REGIONS    2
int pci_request_regions(struct pci_dev *, const char *);
void pci_release_regions(struct pci_dev *);
int pci_request_region(struct pci_dev *, int, const char *);
void pci_release_region(struct pci_dev *, int);

/* drivers/pci/bus.c */
int pci_bus_alloc_resource(struct pci_bus *bus, struct resource *res,
                           unsigned long size, unsigned long align,
                           unsigned long min, unsigned int type_mask,
                           void (*alignf)(void *, struct resource *,
                                          unsigned long, unsigned long),
                           void *alignf_data);
void pci_enable_bridges(struct pci_bus *bus);

/* Proper probing supporting hot-pluggable devices */
int __pci_register_driver(struct pci_driver *, struct module *);
static inline int pci_register_driver(struct pci_driver *driver)
{
        return __pci_register_driver(driver, THIS_MODULE);
}

void pci_unregister_driver(struct pci_driver *);
void pci_remove_behind_bridge(struct pci_dev *);
struct pci_driver *pci_dev_driver(const struct pci_dev *);
const struct pci_device_id *pci_match_device(struct pci_driver *drv, struct pci_dev *dev);
const struct pci_device_id *pci_match_id(const struct pci_device_id *ids, struct pci_dev *dev);
int pci_scan_bridge(struct pci_bus *bus, struct pci_dev * dev, int max, int pass);

void pci_walk_bus(struct pci_bus *top, void (*cb)(struct pci_dev *, void *),
                  void *userdata);
int pci_cfg_space_size(struct pci_dev *dev);
unsigned char pci_bus_max_busnr(struct pci_bus* bus);

/* kmem_cache style wrapper around pci_alloc_consistent() */

#include <linux/dmapool.h>

#define pci_pool dma_pool
#define pci_pool_create(name, pdev, size, align, allocation) \
                dma_pool_create(name, &pdev->dev, size, align, allocation)
#define pci_pool_destroy(pool) dma_pool_destroy(pool)
#define pci_pool_alloc(pool, flags, handle) dma_pool_alloc(pool, flags, handle)
#define pci_pool_free(pool, vaddr, addr) dma_pool_free(pool, vaddr, addr)

enum pci_dma_burst_strategy {
        PCI_DMA_BURST_INFINITY, /* make bursts as large as possible,
                                   strategy_parameter is N/A */
        PCI_DMA_BURST_BOUNDARY, /* disconnect at every strategy_parameter
                                   byte boundaries */
        PCI_DMA_BURST_MULTIPLE, /* disconnect at some multiple of
                                   strategy_parameter byte boundaries */
};

#if defined(CONFIG_ISA) || defined(CONFIG_EISA)
extern struct pci_dev *isa_bridge;
#endif

struct msix_entry {
        u16     vector; /* kernel uses to write allocated vector */
        u16     entry;  /* driver uses to specify entry, OS writes */
};

#ifndef CONFIG_PCI_MSI
static inline void pci_scan_msi_device(struct pci_dev *dev) {}
static inline int pci_enable_msi(struct pci_dev *dev) {return -1;}
static inline void pci_disable_msi(struct pci_dev *dev) {}
static inline int pci_enable_msix(struct pci_dev* dev,
        struct msix_entry *entries, int nvec) {return -1;}
static inline void pci_disable_msix(struct pci_dev *dev) {}
static inline void msi_remove_pci_irq_vectors(struct pci_dev *dev) {}
#else
extern void pci_scan_msi_device(struct pci_dev *dev);
extern int pci_enable_msi(struct pci_dev *dev);
extern void pci_disable_msi(struct pci_dev *dev);
extern int pci_enable_msix(struct pci_dev* dev,
        struct msix_entry *entries, int nvec);
extern void pci_disable_msix(struct pci_dev *dev);
extern void msi_remove_pci_irq_vectors(struct pci_dev *dev);
#endif

extern void pci_block_user_cfg_access(struct pci_dev *dev);
extern void pci_unblock_user_cfg_access(struct pci_dev *dev);

/*
 * PCI domain support.  Sometimes called PCI segment (eg by ACPI),
 * a PCI domain is defined to be a set of PCI busses which share
 * configuration space.
 */
#ifndef CONFIG_PCI_DOMAINS
static inline int pci_domain_nr(struct pci_bus *bus) { return 0; }
static inline int pci_proc_domain(struct pci_bus *bus)
{
        return 0;
}
#endif

#else /* CONFIG_PCI is not enabled */

/*
 *  If the system does not have PCI, clearly these return errors.  Define
 *  these as simple inline functions to avoid hair in drivers.
 */

#define _PCI_NOP(o,s,t) \
        static inline int pci_##o##_config_##s (struct pci_dev *dev, int where, t val) \
                { return PCIBIOS_FUNC_NOT_SUPPORTED; }
#define _PCI_NOP_ALL(o,x)       _PCI_NOP(o,byte,u8 x) \
                                _PCI_NOP(o,word,u16 x) \
                                _PCI_NOP(o,dword,u32 x)
_PCI_NOP_ALL(read, *)
_PCI_NOP_ALL(write,)

static inline struct pci_dev *pci_find_device(unsigned int vendor, unsigned int device, const struct pci_dev *from)
{ return NULL; }

static inline struct pci_dev *pci_find_slot(unsigned int bus, unsigned int devfn)
{ return NULL; }

static inline struct pci_dev *pci_get_device (unsigned int vendor, unsigned int device, struct pci_dev *from)
{ return NULL; }

static inline struct pci_dev *pci_get_subsys (unsigned int vendor, unsigned int device,
unsigned int ss_vendor, unsigned int ss_device, struct pci_dev *from)
{ return NULL; }

static inline struct pci_dev *pci_get_class(unsigned int class, struct pci_dev *from)
{ return NULL; }

#define pci_dev_present(ids)    (0)
#define pci_dev_put(dev)        do { } while (0)

static inline void pci_set_master(struct pci_dev *dev) { }
static inline int pci_enable_device(struct pci_dev *dev) { return -EIO; }
static inline void pci_disable_device(struct pci_dev *dev) { }
static inline int pci_set_dma_mask(struct pci_dev *dev, u64 mask) { return -EIO; }
static inline int pci_assign_resource(struct pci_dev *dev, int i) { return -EBUSY;}
static inline int __pci_register_driver(struct pci_driver *drv, struct module *owner) { return 0;}
static inline int pci_register_driver(struct pci_driver *drv) { return 0;}
static inline void pci_unregister_driver(struct pci_driver *drv) { }
static inline int pci_find_capability (struct pci_dev *dev, int cap) {return 0; }
static inline int pci_find_next_capability (struct pci_dev *dev, u8 post, int cap) { return 0; }
static inline const struct pci_device_id *pci_match_device(const struct pci_device_id *ids, const struct pci_dev *dev) { return NULL; }

/* Power management related routines */
static inline int pci_save_state(struct pci_dev *dev) { return 0; }
static inline int pci_restore_state(struct pci_dev *dev) { return 0; }
static inline int pci_set_power_state(struct pci_dev *dev, pci_power_t state) { return 0; }
static inline pci_power_t pci_choose_state(struct pci_dev *dev, pm_message_t state) { return PCI_D0; }
static inline int pci_enable_wake(struct pci_dev *dev, pci_power_t state, int enable) { return 0; }

#define isa_bridge      ((struct pci_dev *)NULL)

#define pci_dma_burst_advice(pdev, strat, strategy_parameter) do { } while (0)

static inline void pci_block_user_cfg_access(struct pci_dev *dev) { }
static inline void pci_unblock_user_cfg_access(struct pci_dev *dev) { }

#endif /* CONFIG_PCI */

/* Include architecture-dependent settings and functions */

#include <asm/pci.h>

/* these helpers provide future and backwards compatibility
 * for accessing popular PCI BAR info */
#define pci_resource_start(dev,bar)   ((dev)->resource[(bar)].start)
#define pci_resource_end(dev,bar)     ((dev)->resource[(bar)].end)
#define pci_resource_flags(dev,bar)   ((dev)->resource[(bar)].flags)
#define pci_resource_len(dev,bar) \
        ((pci_resource_start((dev),(bar)) == 0 &&       \
          pci_resource_end((dev),(bar)) ==              \
          pci_resource_start((dev),(bar))) ? 0 :        \
                                                        \
         (pci_resource_end((dev),(bar)) -               \
          pci_resource_start((dev),(bar)) + 1))

/* Similar to the helpers above, these manipulate per-pci_dev
 * driver-specific data.  They are really just a wrapper around
 * the generic device structure functions of these calls.
 */
static inline void *pci_get_drvdata (struct pci_dev *pdev)
{
        return dev_get_drvdata(&pdev->dev);
}

static inline void pci_set_drvdata (struct pci_dev *pdev, void *data)
{
        dev_set_drvdata(&pdev->dev, data);
}

/* If you want to know what to call your pci_dev, ask this function.
 * Again, it's a wrapper around the generic device.
 */
static inline char *pci_name(struct pci_dev *pdev)
{
        return pdev->dev.bus_id;
}


/* Some archs don't want to expose struct resource to userland as-is
 * in sysfs and /proc
 */
#ifndef HAVE_ARCH_PCI_RESOURCE_TO_USER
static inline void pci_resource_to_user(const struct pci_dev *dev, int bar,
                const struct resource *rsrc, u64 *start, u64 *end)
{
        *start = rsrc->start;
        *end = rsrc->end;
}
#endif /* HAVE_ARCH_PCI_RESOURCE_TO_USER */


/*
 *  The world is not perfect and supplies us with broken PCI devices.
 *  For at least a part of these bugs we need a work-around, so both
 *  generic (drivers/pci/quirks.c) and per-architecture code can define
 *  fixup hooks to be called for particular buggy devices.
 */

struct pci_fixup {
        u16 vendor, device;     /* You can use PCI_ANY_ID here of course */
        void (*hook)(struct pci_dev *dev);
};

enum pci_fixup_pass {
        pci_fixup_early,        /* Before probing BARs */
        pci_fixup_header,       /* After reading configuration header */
        pci_fixup_final,        /* Final phase of device fixups */
        pci_fixup_enable,       /* pci_enable_device() time */
};

/* Anonymous variables would be nice... */
#define DECLARE_PCI_FIXUP_SECTION(section, name, vendor, device, hook)  \
        static const struct pci_fixup __pci_fixup_##name __attribute_used__ \
        __attribute__((__section__(#section))) = { vendor, device, hook };
#define DECLARE_PCI_FIXUP_EARLY(vendor, device, hook)                   \
        DECLARE_PCI_FIXUP_SECTION(.pci_fixup_early,                     \
                        vendor##device##hook, vendor, device, hook)
#define DECLARE_PCI_FIXUP_HEADER(vendor, device, hook)                  \
        DECLARE_PCI_FIXUP_SECTION(.pci_fixup_header,                    \
                        vendor##device##hook, vendor, device, hook)
#define DECLARE_PCI_FIXUP_FINAL(vendor, device, hook)                   \
        DECLARE_PCI_FIXUP_SECTION(.pci_fixup_final,                     \
                        vendor##device##hook, vendor, device, hook)
#define DECLARE_PCI_FIXUP_ENABLE(vendor, device, hook)                  \
        DECLARE_PCI_FIXUP_SECTION(.pci_fixup_enable,                    \
                        vendor##device##hook, vendor, device, hook)


void pci_fixup_device(enum pci_fixup_pass pass, struct pci_dev *dev);

extern int pci_pci_problems;
#define PCIPCI_FAIL             1
#define PCIPCI_TRITON           2
#define PCIPCI_NATOMA           4
#define PCIPCI_VIAETBF          8
#define PCIPCI_VSFX             16
#define PCIPCI_ALIMAGIK         32

#endif /* __KERNEL__ */
#endif /* LINUX_PCI_H */