FreeBSD/Linux Kernel Cross Reference
sys/sys/agpio.h

     /*-
      * Copyright (c) 2000 Doug Rabson
      * All rights reserved.
      *
      * Redistribution and use in source and binary forms, with or without
      * modification, are permitted provided that the following conditions
      * are met:
      * 1. Redistributions of source code must retain the above copyright
      *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     *
     * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
     * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
     * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     * SUCH DAMAGE.
     *
     *      $FreeBSD: releng/5.0/sys/sys/agpio.h 86711 2001-11-21 08:40:23Z ru $
     */
    
    #ifndef _SYS_AGPIO_H_
    #define _SYS_AGPIO_H_
    
    /*
     * The AGP gatt uses 4k pages irrespective of the host page size.
     */
    #define AGP_PAGE_SIZE           4096
    #define AGP_PAGE_SHIFT          12
    
    /*
     * Macros to manipulate AGP mode words.
     */
    #define AGP_MODE_GET_RQ(x)              (((x) & 0xff000000U) >> 24)
    #define AGP_MODE_GET_SBA(x)             (((x) & 0x00000200U) >> 9)
    #define AGP_MODE_GET_AGP(x)             (((x) & 0x00000100U) >> 8)
    #define AGP_MODE_GET_4G(x)              (((x) & 0x00000020U) >> 5)
    #define AGP_MODE_GET_FW(x)              (((x) & 0x00000010U) >> 4)
    #define AGP_MODE_GET_RATE(x)            ((x) & 0x00000007U)
    #define AGP_MODE_SET_RQ(x,v)            (((x) & ~0xff000000U) | ((v) << 24))
    #define AGP_MODE_SET_SBA(x,v)           (((x) & ~0x00000200U) | ((v) << 9))
    #define AGP_MODE_SET_AGP(x,v)           (((x) & ~0x00000100U) | ((v) << 8))
    #define AGP_MODE_SET_4G(x,v)            (((x) & ~0x00000020U) | ((v) << 5))
    #define AGP_MODE_SET_FW(x,v)            (((x) & ~0x00000010U) | ((v) << 4))
    #define AGP_MODE_SET_RATE(x,v)          (((x) & ~0x00000007U) | (v))
    #define AGP_MODE_RATE_1x                0x00000001
    #define AGP_MODE_RATE_2x                0x00000002
    #define AGP_MODE_RATE_4x                0x00000004
    
    #define AGPIOC_BASE       'A'
    #define AGPIOC_INFO       _IOR (AGPIOC_BASE, 0, agp_info)
    #define AGPIOC_ACQUIRE    _IO  (AGPIOC_BASE, 1)
    #define AGPIOC_RELEASE    _IO  (AGPIOC_BASE, 2)
    #define AGPIOC_SETUP      _IOW (AGPIOC_BASE, 3, agp_setup)
    #if 0
    #define AGPIOC_RESERVE    _IOW (AGPIOC_BASE, 4, agp_region)
    #define AGPIOC_PROTECT    _IOW (AGPIOC_BASE, 5, agp_region)
    #endif
    #define AGPIOC_ALLOCATE   _IOWR(AGPIOC_BASE, 6, agp_allocate)
    #define AGPIOC_DEALLOCATE _IOW (AGPIOC_BASE, 7, int)
    #define AGPIOC_BIND       _IOW (AGPIOC_BASE, 8, agp_bind)
    #define AGPIOC_UNBIND     _IOW (AGPIOC_BASE, 9, agp_unbind)
    
    typedef struct _agp_version {
            u_int16_t major;
            u_int16_t minor;
    } agp_version;
    
    typedef struct _agp_info {
            agp_version version;    /* version of the driver        */
            u_int32_t bridge_id;    /* bridge vendor/device         */
            u_int32_t agp_mode;     /* mode info of bridge          */
            off_t aper_base;        /* base of aperture             */
            size_t aper_size;       /* size of aperture             */
            size_t pg_total;        /* max pages (swap + system)    */
            size_t pg_system;       /* max pages (system)           */
            size_t pg_used;         /* current pages used           */
    } agp_info;
    
    typedef struct _agp_setup {
            u_int32_t agp_mode;             /* mode info of bridge          */
    } agp_setup;
    
    #if 0
    /*
     * The "prot" down below needs still a "sleep" flag somehow ...
     */
    typedef struct _agp_segment {
            off_t pg_start;         /* starting page to populate    */
            size_t pg_count;        /* number of pages              */
            int prot;               /* prot flags for mmap          */
    } agp_segment;
   
   typedef struct _agp_region {
           pid_t pid;              /* pid of process               */
           size_t seg_count;       /* number of segments           */
           struct _agp_segment *seg_list;
   } agp_region;
   #endif
   
   typedef struct _agp_allocate {
           int key;                /* tag of allocation            */
           size_t pg_count;        /* number of pages              */
           u_int32_t type;         /* 0 == normal, other devspec   */
           u_int32_t physical;     /* device specific (some devices  
                                    * need a phys address of the     
                                    * actual page behind the gatt    
                                    * table)                        */
   } agp_allocate;
   
   typedef struct _agp_bind {
           int key;                /* tag of allocation            */
           off_t pg_start;         /* starting page to populate    */
   } agp_bind;
   
   typedef struct _agp_unbind {
           int key;                /* tag of allocation            */
           u_int32_t priority;     /* priority for paging out      */
   } agp_unbind;
   
   #endif /* !_SYS_AGPIO_H_ */

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