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/*

 *      $Id: pci.h,v 1.4 2006-07-04 15:21:01 mauro Exp $

 *

 *      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>

/*

 * Under PCI, each device has 256 bytes of configuration address space,

 * of which the first 64 bytes are standardized as follows:

 */

#define PCI_VENDOR_ID           0x00    /* 16 bits */

#define PCI_DEVICE_ID           0x02    /* 16 bits */

#define PCI_COMMAND             0x04    /* 16 bits */

#define  PCI_COMMAND_IO         0x1     /* Enable response in I/O space */

#define  PCI_COMMAND_MEMORY     0x2     /* Enable response in Memory space */

#define  PCI_COMMAND_MASTER     0x4     /* Enable bus mastering */

#define  PCI_COMMAND_SPECIAL    0x8     /* Enable response to special cycles */

#define  PCI_COMMAND_INVALIDATE 0x10    /* Use memory write and invalidate */

#define  PCI_COMMAND_VGA_PALETTE 0x20   /* Enable palette snooping */

#define  PCI_COMMAND_PARITY     0x40    /* Enable parity checking */

#define  PCI_COMMAND_WAIT       0x80    /* Enable address/data stepping */

#define  PCI_COMMAND_SERR       0x100   /* Enable SERR */

#define  PCI_COMMAND_FAST_BACK  0x200   /* Enable back-to-back writes */

#define PCI_STATUS              0x06    /* 16 bits */

#define  PCI_STATUS_CAP_LIST    0x10    /* Support Capability List */

#define  PCI_STATUS_66MHZ       0x20    /* Support 66 Mhz PCI 2.1 bus */

#define  PCI_STATUS_UDF         0x40    /* Support User Definable Features [obsolete] */

#define  PCI_STATUS_FAST_BACK   0x80    /* Accept fast-back to back */

#define  PCI_STATUS_PARITY      0x100   /* Detected parity error */

#define  PCI_STATUS_DEVSEL_MASK 0x600   /* DEVSEL timing */

#define  PCI_STATUS_DEVSEL_FAST 0x000   

#define  PCI_STATUS_DEVSEL_MEDIUM 0x200

#define  PCI_STATUS_DEVSEL_SLOW 0x400

#define  PCI_STATUS_SIG_TARGET_ABORT 0x800 /* Set on target abort */

#define  PCI_STATUS_REC_TARGET_ABORT 0x1000 /* Master ack of " */

#define  PCI_STATUS_REC_MASTER_ABORT 0x2000 /* Set on master abort */

#define  PCI_STATUS_SIG_SYSTEM_ERROR 0x4000 /* Set when we drive SERR */

#define  PCI_STATUS_DETECTED_PARITY 0x8000 /* Set on parity error */

#define PCI_CLASS_REVISION      0x08    /* High 24 bits are class, low 8

                                           revision */

#define PCI_REVISION_ID         0x08    /* Revision ID */

#define PCI_CLASS_PROG          0x09    /* Reg. Level Programming Interface */

#define PCI_CLASS_DEVICE        0x0a    /* Device class */

#define PCI_CACHE_LINE_SIZE     0x0c    /* 8 bits */

#define PCI_LATENCY_TIMER       0x0d    /* 8 bits */

#define PCI_HEADER_TYPE         0x0e    /* 8 bits */

#define  PCI_HEADER_TYPE_NORMAL 0

#define  PCI_HEADER_TYPE_BRIDGE 1

#define  PCI_HEADER_TYPE_CARDBUS 2

#define PCI_BIST                0x0f    /* 8 bits */

#define  PCI_BIST_CODE_MASK     0x0f    /* Return result */

#define  PCI_BIST_START         0x40    /* 1 to start BIST, 2 secs or less */

#define  PCI_BIST_CAPABLE       0x80    /* 1 if BIST capable */

/*

 * Base addresses specify locations in memory or I/O space.

 * Decoded size can be determined by writing a value of

 * 0xffffffff to the register, and reading it back.  Only

 * 1 bits are decoded.

 */

#define PCI_BASE_ADDRESS_0      0x10    /* 32 bits */

#define PCI_BASE_ADDRESS_1      0x14    /* 32 bits [htype 0,1 only] */

#define PCI_BASE_ADDRESS_2      0x18    /* 32 bits [htype 0 only] */

#define PCI_BASE_ADDRESS_3      0x1c    /* 32 bits */

#define PCI_BASE_ADDRESS_4      0x20    /* 32 bits */

#define PCI_BASE_ADDRESS_5      0x24    /* 32 bits */

#define  PCI_BASE_ADDRESS_SPACE 0x01    /* 0 = memory, 1 = I/O */

#define  PCI_BASE_ADDRESS_SPACE_IO 0x01

#define  PCI_BASE_ADDRESS_SPACE_MEMORY 0x00

#define  PCI_BASE_ADDRESS_MEM_TYPE_MASK 0x06

#define  PCI_BASE_ADDRESS_MEM_TYPE_32   0x00    /* 32 bit address */

#define  PCI_BASE_ADDRESS_MEM_TYPE_1M   0x02    /* Below 1M [obsolete] */

#define  PCI_BASE_ADDRESS_MEM_TYPE_64   0x04    /* 64 bit address */

#define  PCI_BASE_ADDRESS_MEM_PREFETCH  0x08    /* prefetchable? */

#define  PCI_BASE_ADDRESS_MEM_MASK      (~0x0fUL)

#define  PCI_BASE_ADDRESS_IO_MASK       (~0x03UL)

/* bit 1 is reserved if address_space = 1 */

/* Header type 0 (normal devices) */

#define PCI_CARDBUS_CIS         0x28

#define PCI_SUBSYSTEM_VENDOR_ID 0x2c

#define PCI_SUBSYSTEM_ID        0x2e  

#define PCI_ROM_ADDRESS         0x30    /* Bits 31..11 are address, 10..1 reserved */

#define  PCI_ROM_ADDRESS_ENABLE 0x01

#define PCI_ROM_ADDRESS_MASK    (~0x7ffUL)

#define PCI_CAPABILITY_LIST     0x34    /* Offset of first capability list entry */

/* 0x35-0x3b are reserved */

#define PCI_INTERRUPT_LINE      0x3c    /* 8 bits */

#define PCI_INTERRUPT_PIN       0x3d    /* 8 bits */

#define PCI_MIN_GNT             0x3e    /* 8 bits */

#define PCI_MAX_LAT             0x3f    /* 8 bits */

/* Header type 1 (PCI-to-PCI bridges) */

#define PCI_PRIMARY_BUS         0x18    /* Primary bus number */

#define PCI_SECONDARY_BUS       0x19    /* Secondary bus number */

#define PCI_SUBORDINATE_BUS     0x1a    /* Highest bus number behind the bridge */

#define PCI_SEC_LATENCY_TIMER   0x1b    /* Latency timer for secondary interface */

#define PCI_IO_BASE             0x1c    /* I/O range behind the bridge */

#define PCI_IO_LIMIT            0x1d

#define  PCI_IO_RANGE_TYPE_MASK 0x0fUL  /* I/O bridging type */

#define  PCI_IO_RANGE_TYPE_16   0x00

#define  PCI_IO_RANGE_TYPE_32   0x01

#define  PCI_IO_RANGE_MASK      (~0x0fUL)

#define PCI_SEC_STATUS          0x1e    /* Secondary status register, only bit 14 used */

#define PCI_MEMORY_BASE         0x20    /* Memory range behind */

#define PCI_MEMORY_LIMIT        0x22

#define  PCI_MEMORY_RANGE_TYPE_MASK 0x0fUL

#define  PCI_MEMORY_RANGE_MASK  (~0x0fUL)

#define PCI_PREF_MEMORY_BASE    0x24    /* Prefetchable memory range behind */

#define PCI_PREF_MEMORY_LIMIT   0x26

#define  PCI_PREF_RANGE_TYPE_MASK 0x0fUL

#define  PCI_PREF_RANGE_TYPE_32 0x00

#define  PCI_PREF_RANGE_TYPE_64 0x01

#define  PCI_PREF_RANGE_MASK    (~0x0fUL)

#define PCI_PREF_BASE_UPPER32   0x28    /* Upper half of prefetchable memory range */

#define PCI_PREF_LIMIT_UPPER32  0x2c

#define PCI_IO_BASE_UPPER16     0x30    /* Upper half of I/O addresses */

#define PCI_IO_LIMIT_UPPER16    0x32

/* 0x34 same as for htype 0 */

/* 0x35-0x3b is reserved */

#define PCI_ROM_ADDRESS1        0x38    /* Same as PCI_ROM_ADDRESS, but for htype 1 */

/* 0x3c-0x3d are same as for htype 0 */

#define PCI_BRIDGE_CONTROL      0x3e

#define  PCI_BRIDGE_CTL_PARITY  0x01    /* Enable parity detection on secondary interface */

#define  PCI_BRIDGE_CTL_SERR    0x02    /* The same for SERR forwarding */

#define  PCI_BRIDGE_CTL_NO_ISA  0x04    /* Disable bridging of ISA ports */

#define  PCI_BRIDGE_CTL_VGA     0x08    /* Forward VGA addresses */

#define  PCI_BRIDGE_CTL_MASTER_ABORT 0x20  /* Report master aborts */

#define  PCI_BRIDGE_CTL_BUS_RESET 0x40  /* Secondary bus reset */

#define  PCI_BRIDGE_CTL_FAST_BACK 0x80  /* Fast Back2Back enabled on secondary interface */

/* Header type 2 (CardBus bridges) */

#define PCI_CB_CAPABILITY_LIST  0x14

/* 0x15 reserved */

#define PCI_CB_SEC_STATUS       0x16    /* Secondary status */

#define PCI_CB_PRIMARY_BUS      0x18    /* PCI bus number */

#define PCI_CB_CARD_BUS         0x19    /* CardBus bus number */

#define PCI_CB_SUBORDINATE_BUS  0x1a    /* Subordinate bus number */

#define PCI_CB_LATENCY_TIMER    0x1b    /* CardBus latency timer */

#define PCI_CB_MEMORY_BASE_0    0x1c

#define PCI_CB_MEMORY_LIMIT_0   0x20

#define PCI_CB_MEMORY_BASE_1    0x24

#define PCI_CB_MEMORY_LIMIT_1   0x28

#define PCI_CB_IO_BASE_0        0x2c

#define PCI_CB_IO_BASE_0_HI     0x2e

#define PCI_CB_IO_LIMIT_0       0x30

#define PCI_CB_IO_LIMIT_0_HI    0x32

#define PCI_CB_IO_BASE_1        0x34

#define PCI_CB_IO_BASE_1_HI     0x36

#define PCI_CB_IO_LIMIT_1       0x38

#define PCI_CB_IO_LIMIT_1_HI    0x3a

#define  PCI_CB_IO_RANGE_MASK   (~0x03UL)

/* 0x3c-0x3d are same as for htype 0 */

#define PCI_CB_BRIDGE_CONTROL   0x3e

#define  PCI_CB_BRIDGE_CTL_PARITY       0x01    /* Similar to standard bridge control register */

#define  PCI_CB_BRIDGE_CTL_SERR         0x02

#define  PCI_CB_BRIDGE_CTL_ISA          0x04

#define  PCI_CB_BRIDGE_CTL_VGA          0x08

#define  PCI_CB_BRIDGE_CTL_MASTER_ABORT 0x20

#define  PCI_CB_BRIDGE_CTL_CB_RESET     0x40    /* CardBus reset */

#define  PCI_CB_BRIDGE_CTL_16BIT_INT    0x80    /* Enable interrupt for 16-bit cards */

#define  PCI_CB_BRIDGE_CTL_PREFETCH_MEM0 0x100  /* Prefetch enable for both memory regions */

#define  PCI_CB_BRIDGE_CTL_PREFETCH_MEM1 0x200

#define  PCI_CB_BRIDGE_CTL_POST_WRITES  0x400

#define PCI_CB_SUBSYSTEM_VENDOR_ID 0x40

#define PCI_CB_SUBSYSTEM_ID     0x42

#define PCI_CB_LEGACY_MODE_BASE 0x44    /* 16-bit PC Card legacy mode base address (ExCa) */

/* 0x48-0x7f reserved */

/* Capability lists */

#define PCI_CAP_LIST_ID         0       /* Capability ID */

#define  PCI_CAP_ID_PM          0x01    /* Power Management */

#define  PCI_CAP_ID_AGP         0x02    /* Accelerated Graphics Port */

#define  PCI_CAP_ID_VPD         0x03    /* Vital Product Data */

#define  PCI_CAP_ID_SLOTID      0x04    /* Slot Identification */

#define  PCI_CAP_ID_MSI         0x05    /* Message Signalled Interrupts */

#define  PCI_CAP_ID_CHSWP       0x06    /* CompactPCI HotSwap */

#define  PCI_CAP_ID_PCIX        0x07    /* PCI-X */

#define PCI_CAP_LIST_NEXT       1       /* Next capability in the list */

#define PCI_CAP_FLAGS           2       /* Capability defined flags (16 bits) */

#define PCI_CAP_SIZEOF          4

/* Power Management Registers */

#define PCI_PM_PMC              2       /* PM Capabilities Register */

#define  PCI_PM_CAP_VER_MASK    0x0007  /* Version */

#define  PCI_PM_CAP_PME_CLOCK   0x0008  /* PME clock required */

#define  PCI_PM_CAP_RESERVED    0x0010  /* Reserved field */

#define  PCI_PM_CAP_DSI         0x0020  /* Device specific initialization */

#define  PCI_PM_CAP_AUX_POWER   0x01C0  /* Auxilliary power support mask */

#define  PCI_PM_CAP_D1          0x0200  /* D1 power state support */

#define  PCI_PM_CAP_D2          0x0400  /* D2 power state support */

#define  PCI_PM_CAP_PME         0x0800  /* PME pin supported */

#define  PCI_PM_CAP_PME_MASK    0xF800  /* PME Mask of all supported states */

#define  PCI_PM_CAP_PME_D0      0x0800  /* PME# from D0 */

#define  PCI_PM_CAP_PME_D1      0x1000  /* PME# from D1 */

#define  PCI_PM_CAP_PME_D2      0x2000  /* PME# from D2 */

#define  PCI_PM_CAP_PME_D3      0x4000  /* PME# from D3 (hot) */

#define  PCI_PM_CAP_PME_D3cold  0x8000  /* PME# from D3 (cold) */

#define PCI_PM_CTRL             4       /* PM control and status register */

#define  PCI_PM_CTRL_STATE_MASK 0x0003  /* Current power state (D0 to D3) */

#define  PCI_PM_CTRL_PME_ENABLE 0x0100  /* PME pin enable */

#define  PCI_PM_CTRL_DATA_SEL_MASK      0x1e00  /* Data select (??) */

#define  PCI_PM_CTRL_DATA_SCALE_MASK    0x6000  /* Data scale (??) */

#define  PCI_PM_CTRL_PME_STATUS 0x8000  /* PME pin status */

#define PCI_PM_PPB_EXTENSIONS   6       /* PPB support extensions (??) */

#define  PCI_PM_PPB_B2_B3       0x40    /* Stop clock when in D3hot (??) */

#define  PCI_PM_BPCC_ENABLE     0x80    /* Bus power/clock control enable (??) */

#define PCI_PM_DATA_REGISTER    7       /* (??) */

#define PCI_PM_SIZEOF           8

/* AGP registers */

#define PCI_AGP_VERSION         2       /* BCD version number */

#define PCI_AGP_RFU             3       /* Rest of capability flags */

#define PCI_AGP_STATUS          4       /* Status register */

#define  PCI_AGP_STATUS_RQ_MASK 0xff000000      /* Maximum number of requests - 1 */

#define  PCI_AGP_STATUS_SBA     0x0200  /* Sideband addressing supported */

#define  PCI_AGP_STATUS_64BIT   0x0020  /* 64-bit addressing supported */

#define  PCI_AGP_STATUS_FW      0x0010  /* FW transfers supported */

#define  PCI_AGP_STATUS_RATE4   0x0004  /* 4x transfer rate supported */

#define  PCI_AGP_STATUS_RATE2   0x0002  /* 2x transfer rate supported */

#define  PCI_AGP_STATUS_RATE1   0x0001  /* 1x transfer rate supported */

#define PCI_AGP_COMMAND         8       /* Control register */

#define  PCI_AGP_COMMAND_RQ_MASK 0xff000000  /* Master: Maximum number of requests */

#define  PCI_AGP_COMMAND_SBA    0x0200  /* Sideband addressing enabled */

#define  PCI_AGP_COMMAND_AGP    0x0100  /* Allow processing of AGP transactions */

#define  PCI_AGP_COMMAND_64BIT  0x0020  /* Allow processing of 64-bit addresses */

#define  PCI_AGP_COMMAND_FW     0x0010  /* Force FW transfers */

#define  PCI_AGP_COMMAND_RATE4  0x0004  /* Use 4x rate */

#define  PCI_AGP_COMMAND_RATE2  0x0002  /* Use 2x rate */

#define  PCI_AGP_COMMAND_RATE1  0x0001  /* Use 1x rate */

#define PCI_AGP_SIZEOF          12

/* Vital Product Data */

#define PCI_VPD_ADDR            2       /* Address to access (15 bits!) */

#define  PCI_VPD_ADDR_MASK      0x7fff  /* Address mask */

#define  PCI_VPD_ADDR_F         0x8000  /* Write 0, 1 indicates completion */

#define PCI_VPD_DATA            4       /* 32-bits of data returned here */

/* Slot Identification */

#define PCI_SID_ESR             2       /* Expansion Slot Register */

#define  PCI_SID_ESR_NSLOTS     0x1f    /* Number of expansion slots available */

#define  PCI_SID_ESR_FIC        0x20    /* First In Chassis Flag */

#define PCI_SID_CHASSIS_NR      3       /* Chassis Number */

/* Message Signalled Interrupts registers */

#define PCI_MSI_FLAGS           2       /* Various flags */

#define  PCI_MSI_FLAGS_64BIT    0x80    /* 64-bit addresses allowed */

#define  PCI_MSI_FLAGS_QSIZE    0x70    /* Message queue size configured */

#define  PCI_MSI_FLAGS_QMASK    0x0e    /* Maximum queue size available */

#define  PCI_MSI_FLAGS_ENABLE   0x01    /* MSI feature enabled */

#define PCI_MSI_RFU             3       /* Rest of capability flags */

#define PCI_MSI_ADDRESS_LO      4       /* Lower 32 bits */

#define PCI_MSI_ADDRESS_HI      8       /* Upper 32 bits (if PCI_MSI_FLAGS_64BIT set) */

#define PCI_MSI_DATA_32         8       /* 16 bits of data for 32-bit devices */

#define PCI_MSI_DATA_64         12      /* 16 bits of data for 64-bit devices */

/* CompactPCI Hotswap Register */

#define PCI_CHSWP_CSR           2       /* Control and Status Register */

#define  PCI_CHSWP_DHA          0x01    /* Device Hiding Arm */

#define  PCI_CHSWP_EIM          0x02    /* ENUM# Signal Mask */

#define  PCI_CHSWP_PIE          0x04    /* Pending Insert or Extract */

#define  PCI_CHSWP_LOO          0x08    /* LED On / Off */

#define  PCI_CHSWP_PI           0x30    /* Programming Interface */

#define  PCI_CHSWP_EXT          0x40    /* ENUM# status - extraction */

#define  PCI_CHSWP_INS          0x80    /* ENUM# status - insertion */

/* PCI-X registers */

#define PCI_X_CMD               2       /* Modes & Features */

#define  PCI_X_CMD_DPERR_E      0x0001  /* Data Parity Error Recovery Enable */

#define  PCI_X_CMD_ERO          0x0002  /* Enable Relaxed Ordering */

#define  PCI_X_CMD_MAX_READ     0x000c  /* Max Memory Read Byte Count */

#define  PCI_X_CMD_MAX_SPLIT    0x0070  /* Max Outstanding Split Transactions */

#define PCI_X_DEVFN             4       /* A copy of devfn. */

#define PCI_X_BUSNR             5       /* Bus segment number */

#define PCI_X_STATUS            6       /* PCI-X capabilities */

#define  PCI_X_STATUS_64BIT     0x0001  /* 64-bit device */

#define  PCI_X_STATUS_133MHZ    0x0002  /* 133 MHz capable */

#define  PCI_X_STATUS_SPL_DISC  0x0004  /* Split Completion Discarded */

#define  PCI_X_STATUS_UNX_SPL   0x0008  /* Unexpected Split Completion */

#define  PCI_X_STATUS_COMPLEX   0x0010  /* Device Complexity */

#define  PCI_X_STATUS_MAX_READ  0x0060  /* Designed Maximum Memory Read Count */

#define  PCI_X_STATUS_MAX_SPLIT 0x0380  /* Design Max Outstanding Split Trans */

#define  PCI_X_STATUS_MAX_CUM   0x1c00  /* Designed Max Cumulative Read Size */

#define  PCI_X_STATUS_SPL_ERR   0x2000  /* Rcvd Split Completion Error Msg */

/* 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_IRQ        2

#define DEVICE_COUNT_DMA        2

#define DEVICE_COUNT_RESOURCE   12

/*

 * 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 */

        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.  */

        struct list_head pools;         /* pci_pools tied to this device */

        u64             consistent_dma_mask;/* Like dma_mask, but for

                                               pci_alloc_consistent mappings as

                                               not all hardware supports

                                               64 bit addresses for consistent

                                               allocations such descriptors. */

        u32             current_state;  /* Current operating state. In ACPI-speak,

                                           this is D0-D3, D0 being fully functional,

                                           and D3 being off. */

        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];

        /*

         * 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 */

        struct resource dma_resource[DEVICE_COUNT_DMA];

        struct resource irq_resource[DEVICE_COUNT_IRQ];

        char *          slot_name;      /* pointer to dev.bus_id */

        /* These fields are used by common fixups */

        unsigned int    transparent:1;  /* Transparent PCI bridge */

        unsigned int    multifunction:1;/* Part of multi-function device */

#ifdef CONFIG_PCI_NAMES

#define PCI_NAME_SIZE   50

#define PCI_NAME_HALF   __stringify(20) /* less than half to handle slop */

        char            pretty_name[PCI_NAME_SIZE];     /* pretty name for users to see */

#endif

};

#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)

/*

 *  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 4

#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];

        struct  device  * dev;

};

#define pci_bus_b(n) list_entry(n, struct pci_bus, node)

/*

 * 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)(int dom, int bus, int devfn, int reg, int len, u32 *val);

        int (*write)(int dom, int bus, 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 */

};

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, u32 state);       /* Device suspended */

        int  (*resume) (struct pci_dev *dev);                   /* Device woken up */

        int  (*enable_wake) (struct pci_dev *dev, u32 state, int enable);   /* Enable wake event */

        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

/* 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);

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)

{

        return pci_scan_bus_parented(NULL, bus, ops, sysdata);

}

int pci_scan_slot(struct pci_bus *bus, int devfn);

void pci_bus_add_devices(struct pci_bus *bus);

void pci_name_device(struct pci_dev *dev);

char *pci_class_name(u32 class);

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_device(struct pci_dev *dev);

/* 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_subsys (unsigned int vendor, unsigned int device,

                                 unsigned int ss_vendor, unsigned int ss_device,

                                 const struct pci_dev *from);

struct pci_dev *pci_find_class (unsigned int class, 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);

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);

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);

int pci_set_dma_mask(struct pci_dev *dev, u64 mask);

int pci_dac_set_dma_mask(struct pci_dev *dev, u64 mask);

int pci_set_consistent_dma_mask(struct pci_dev *dev, u64 mask);

int pci_assign_resource(struct pci_dev *dev, int i);

/* Power management related routines */

int pci_save_state(struct pci_dev *dev, u32 *buffer);

int pci_restore_state(struct pci_dev *dev, u32 *buffer);

int pci_set_power_state(struct pci_dev *dev, int state);

int pci_enable_wake(struct pci_dev *dev, u32 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 *, char *);

void pci_release_regions(struct pci_dev *);

int pci_request_region(struct pci_dev *, int, char *);

void pci_release_region(struct pci_dev *, int);

/* drivers/pci/bus.c */

void pci_enable_bridges(struct pci_bus *bus);

/* New-style probing supporting hot-pluggable devices */

int pci_register_driver(struct pci_driver *);

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(const struct pci_device_id *ids, const struct pci_dev *dev);

int pci_scan_bridge(struct pci_bus *bus, struct pci_dev * dev, int max, int pass);

/* kmem_cache style wrapper around pci_alloc_consistent() */

struct pci_pool *pci_pool_create (const char *name, struct pci_dev *dev,

                size_t size, size_t align, size_t allocation);

void pci_pool_destroy (struct pci_pool *pool);

void *pci_pool_alloc (struct pci_pool *pool, int flags, dma_addr_t *handle);

void pci_pool_free (struct pci_pool *pool, void *vaddr, dma_addr_t addr);

void *pci_pool_alloc_usb (struct pci_pool *pool, int flags, dma_addr_t *handle);

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

extern struct pci_dev *isa_bridge;

#endif

#endif /* CONFIG_PCI */

/* Include architecture-dependent settings and functions */

#include <asm/pci.h>

/*

 *  If the system does not have PCI, clearly these return errors.  Define

 *  these as simple inline functions to avoid hair in drivers.

 */

#ifndef CONFIG_PCI

#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_class(unsigned int class, 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_find_subsys(unsigned int vendor, unsigned int device,

unsigned int ss_vendor, unsigned int ss_device, const struct pci_dev *from)

{ 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 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_module_init(struct pci_driver *drv) { return -ENODEV; }

static inline int pci_set_dma_mask(struct pci_dev *dev, u64 mask) { return -EIO; }

static inline int pci_dac_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) { 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 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, u32 *buffer) { return 0; }

static inline int pci_restore_state(struct pci_dev *dev, u32 *buffer) { return 0; }

static inline int pci_set_power_state(struct pci_dev *dev, int state) { return 0; }

static inline int pci_enable_wake(struct pci_dev *dev, u32 state, int enable) { return 0; }

#define isa_bridge      ((struct pci_dev *)NULL)

#else

/*

 * a helper function which helps ensure correct pci_driver

 * setup and cleanup for commonly-encountered hotplug/modular cases

 *

 * This MUST stay in a header, as it checks for -DMODULE

 */

static inline int pci_module_init(struct pci_driver *drv)

{

        int rc = pci_register_driver (drv);

        if (rc > 0)

                return 0;

        /* iff CONFIG_HOTPLUG and built into kernel, we should

         * leave the driver around for future hotplug events.

         * For the module case, a hotplug daemon of some sort

         * should load a module in response to an insert event. */

#if defined(CONFIG_HOTPLUG) && !defined(MODULE)

        if (rc == 0)

                return 0;

#else

        if (rc == 0)

                rc = -ENODEV;          

#endif

        /* if we get here, we need to clean up pci driver instance

         * and return some sort of error */

        pci_unregister_driver (drv);

        return rc;

}

/*

 * 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_name_bus(char *name, struct pci_bus *bus)

{

        sprintf26(name, "%02x", bus->number);

        return 0;

}

#endif

#endif /* !CONFIG_PCI */

/* 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 want to see the pretty pci name, so use this macro */

#ifdef CONFIG_PCI_NAMES

#define pci_pretty_name(dev) ((dev)->pretty_name)

#else

#define pci_pretty_name(dev) ""

#endif