The Design and Implementation of the FreeBSD Operating System, Second Edition
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FreeBSD/Linux Kernel Cross Reference
sys/sys/agpio.h

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    1 /*-
    2  * Copyright (c) 2000 Doug Rabson
    3  * All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer.
   10  * 2. Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in the
   12  *    documentation and/or other materials provided with the distribution.
   13  *
   14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   24  * SUCH DAMAGE.
   25  *
   26  *      $FreeBSD: releng/8.1/sys/sys/agpio.h 199583 2009-11-20 15:27:52Z jhb $
   27  */
   28 
   29 #ifndef _SYS_AGPIO_H_
   30 #define _SYS_AGPIO_H_
   31 
   32 /*
   33  * The AGP gatt uses 4k pages irrespective of the host page size.
   34  */
   35 #define AGP_PAGE_SIZE           4096
   36 #define AGP_PAGE_SHIFT          12
   37 
   38 /*
   39  * Macros to manipulate AGP mode words.
   40  *
   41  * SBA = Sideband Address Port
   42  * FW  = Fast Writes
   43  */
   44 #define AGP_MODE_GET_RQ(x)              (((x) & 0xff000000U) >> 24)
   45 #define AGP_MODE_GET_ARQSZ(x)           (((x) & 0x0000e000U) >> 13)
   46 #define AGP_MODE_GET_CAL(x)             (((x) & 0x00001c00U) >> 10)
   47 #define AGP_MODE_GET_SBA(x)             (((x) & 0x00000200U) >> 9)
   48 #define AGP_MODE_GET_AGP(x)             (((x) & 0x00000100U) >> 8)
   49 #define AGP_MODE_GET_GART_64(x)         (((x) & 0x00000080U) >> 7)
   50 #define AGP_MODE_GET_OVER_4G(x)         (((x) & 0x00000020U) >> 5)
   51 #define AGP_MODE_GET_FW(x)              (((x) & 0x00000010U) >> 4)
   52 #define AGP_MODE_GET_MODE_3(x)          (((x) & 0x00000008U) >> 3)
   53 #define AGP_MODE_GET_RATE(x)            ((x) & 0x00000007U)
   54 #define AGP_MODE_SET_RQ(x,v)            (((x) & ~0xff000000U) | ((v) << 24))
   55 #define AGP_MODE_SET_ARQSZ(x,v)         (((x) & ~0x0000e000U) | ((v) << 13))
   56 #define AGP_MODE_SET_CAL(x,v)           (((x) & ~0x00001c00U) | ((v) << 10))
   57 #define AGP_MODE_SET_SBA(x,v)           (((x) & ~0x00000200U) | ((v) << 9))
   58 #define AGP_MODE_SET_AGP(x,v)           (((x) & ~0x00000100U) | ((v) << 8))
   59 #define AGP_MODE_SET_GART_64(x,v)       (((x) & ~0x00000080U) | ((v) << 7))
   60 #define AGP_MODE_SET_OVER_4G(x,v)       (((x) & ~0x00000020U) | ((v) << 5))
   61 #define AGP_MODE_SET_FW(x,v)            (((x) & ~0x00000010U) | ((v) << 4))
   62 #define AGP_MODE_SET_MODE_3(x,v)        (((x) & ~0x00000008U) | ((v) << 3))
   63 #define AGP_MODE_SET_RATE(x,v)          (((x) & ~0x00000007U) | (v))
   64 #define AGP_MODE_V2_RATE_1x             0x00000001
   65 #define AGP_MODE_V2_RATE_2x             0x00000002
   66 #define AGP_MODE_V2_RATE_4x             0x00000004
   67 #define AGP_MODE_V3_RATE_4x             0x00000001
   68 #define AGP_MODE_V3_RATE_8x             0x00000002
   69 #define AGP_MODE_V3_RATE_RSVD           0x00000004
   70 
   71 /* XXX: Compat */
   72 #define AGP_MODE_GET_4G(x)              AGP_MODE_GET_OVER_4G(x)
   73 #define AGP_MODE_SET_4G(x)              AGP_MODE_SET_OVER_4G(x)
   74 #define AGP_MODE_RATE_1x                AGP_MODE_V2_RATE_1x
   75 #define AGP_MODE_RATE_2x                AGP_MODE_V2_RATE_2x
   76 #define AGP_MODE_RATE_4x                AGP_MODE_V2_RATE_4x
   77 
   78 #define AGPIOC_BASE       'A'
   79 #define AGPIOC_INFO       _IOR (AGPIOC_BASE, 0, agp_info)
   80 #define AGPIOC_ACQUIRE    _IO  (AGPIOC_BASE, 1)
   81 #define AGPIOC_RELEASE    _IO  (AGPIOC_BASE, 2)
   82 #define AGPIOC_SETUP      _IOW (AGPIOC_BASE, 3, agp_setup)
   83 #if 0
   84 #define AGPIOC_RESERVE    _IOW (AGPIOC_BASE, 4, agp_region)
   85 #define AGPIOC_PROTECT    _IOW (AGPIOC_BASE, 5, agp_region)
   86 #endif
   87 #define AGPIOC_ALLOCATE   _IOWR(AGPIOC_BASE, 6, agp_allocate)
   88 #define AGPIOC_DEALLOCATE _IOW (AGPIOC_BASE, 7, int)
   89 #define AGPIOC_BIND       _IOW (AGPIOC_BASE, 8, agp_bind)
   90 #define AGPIOC_UNBIND     _IOW (AGPIOC_BASE, 9, agp_unbind)
   91 
   92 typedef struct _agp_version {
   93         u_int16_t major;
   94         u_int16_t minor;
   95 } agp_version;
   96 
   97 typedef struct _agp_info {
   98         agp_version version;    /* version of the driver        */
   99         u_int32_t bridge_id;    /* bridge vendor/device         */
  100         u_int32_t agp_mode;     /* mode info of bridge          */
  101         off_t aper_base;        /* base of aperture             */
  102         size_t aper_size;       /* size of aperture             */
  103         size_t pg_total;        /* max pages (swap + system)    */
  104         size_t pg_system;       /* max pages (system)           */
  105         size_t pg_used;         /* current pages used           */
  106 } agp_info;
  107 
  108 typedef struct _agp_setup {
  109         u_int32_t agp_mode;             /* mode info of bridge          */
  110 } agp_setup;
  111 
  112 #if 0
  113 /*
  114  * The "prot" down below needs still a "sleep" flag somehow ...
  115  */
  116 typedef struct _agp_segment {
  117         off_t pg_start;         /* starting page to populate    */
  118         size_t pg_count;        /* number of pages              */
  119         int prot;               /* prot flags for mmap          */
  120 } agp_segment;
  121 
  122 typedef struct _agp_region {
  123         pid_t pid;              /* pid of process               */
  124         size_t seg_count;       /* number of segments           */
  125         struct _agp_segment *seg_list;
  126 } agp_region;
  127 #endif
  128 
  129 typedef struct _agp_allocate {
  130         int key;                /* tag of allocation            */
  131         size_t pg_count;        /* number of pages              */
  132         u_int32_t type;         /* 0 == normal, other devspec   */
  133         u_int32_t physical;     /* device specific (some devices  
  134                                  * need a phys address of the     
  135                                  * actual page behind the gatt    
  136                                  * table)                        */
  137 } agp_allocate;
  138 
  139 typedef struct _agp_bind {
  140         int key;                /* tag of allocation            */
  141         off_t pg_start;         /* starting page to populate    */
  142 } agp_bind;
  143 
  144 typedef struct _agp_unbind {
  145         int key;                /* tag of allocation            */
  146         u_int32_t priority;     /* priority for paging out      */
  147 } agp_unbind;
  148 
  149 #endif /* !_SYS_AGPIO_H_ */

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