include/linux/agpgart.h

   1 /*
   2  * AGPGART module version 0.99
   3  * Copyright (C) 1999 Jeff Hartmann
   4  * Copyright (C) 1999 Precision Insight, Inc.
   5  * Copyright (C) 1999 Xi Graphics, Inc.
   6  *
   7  * Permission is hereby granted, free of charge, to any person obtaining a
   8  * copy of this software and associated documentation files (the "Software"),
   9  * to deal in the Software without restriction, including without limitation
  10  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  11  * and/or sell copies of the Software, and to permit persons to whom the
  12  * Software is furnished to do so, subject to the following conditions:
  13  *
  14  * The above copyright notice and this permission notice shall be included
  15  * in all copies or substantial portions of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  18  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  20  * JEFF HARTMANN, OR ANY OTHER CONTRIBUTORS BE LIABLE FOR ANY CLAIM,
  21  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  22  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE
  23  * OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  24  *
  25  */
  26
  27 #ifndef _AGP_H
  28 #define _AGP_H 1
  29
  30 #define AGPIOC_BASE       'A'
  31 #define AGPIOC_INFO       _IOR (AGPIOC_BASE, 0, agp_info*)
  32 #define AGPIOC_ACQUIRE    _IO  (AGPIOC_BASE, 1)
  33 #define AGPIOC_RELEASE    _IO  (AGPIOC_BASE, 2)
  34 #define AGPIOC_SETUP      _IOW (AGPIOC_BASE, 3, agp_setup*)
  35 #define AGPIOC_RESERVE    _IOW (AGPIOC_BASE, 4, agp_region*)
  36 #define AGPIOC_PROTECT    _IOW (AGPIOC_BASE, 5, agp_region*)
  37 #define AGPIOC_ALLOCATE   _IOWR(AGPIOC_BASE, 6, agp_allocate*)
  38 #define AGPIOC_DEALLOCATE _IOW (AGPIOC_BASE, 7, int)
  39 #define AGPIOC_BIND       _IOW (AGPIOC_BASE, 8, agp_bind*)
  40 #define AGPIOC_UNBIND     _IOW (AGPIOC_BASE, 9, agp_unbind*)
  41
  42 #define AGP_DEVICE      "/dev/agpgart"
  43
  44 #ifndef TRUE
  45 #define TRUE 1
  46 #endif
  47
  48 #ifndef FALSE
  49 #define FALSE 0
  50 #endif
  51
  52 #ifndef __KERNEL__
  53 #include <linux/types.h>
  54 #include <asm/types.h>
  55
  56 typedef struct _agp_version {
  57         __u16 major;
  58         __u16 minor;
  59 } agp_version;
  60
  61 typedef struct _agp_info {
  62         agp_version version;    /* version of the driver        */
  63         __u32 bridge_id;        /* bridge vendor/device         */
  64         __u32 agp_mode;         /* mode info of bridge          */
  65         off_t aper_base;        /* base of aperture             */
  66         size_t aper_size;       /* size of aperture             */
  67         size_t pg_total;        /* max pages (swap + system)    */
  68         size_t pg_system;       /* max pages (system)           */
  69         size_t pg_used;         /* current pages used           */
  70 } agp_info;
  71
  72 typedef struct _agp_setup {
  73         __u32 agp_mode;         /* mode info of bridge          */
  74 } agp_setup;
  75
  76 /*
  77  * The "prot" down below needs still a "sleep" flag somehow ...
  78  */
  79 typedef struct _agp_segment {
  80         off_t pg_start;         /* starting page to populate    */
  81         size_t pg_count;        /* number of pages              */
  82         int prot;               /* prot flags for mmap          */
  83 } agp_segment;
  84
  85 typedef struct _agp_region {
  86         pid_t pid;              /* pid of process               */
  87         size_t seg_count;       /* number of segments           */
  88         struct _agp_segment *seg_list;
  89 } agp_region;
  90
  91 typedef struct _agp_allocate {
  92         int key;                /* tag of allocation            */
  93         size_t pg_count;        /* number of pages              */
  94         __u32 type;             /* 0 == normal, other devspec   */
  95         __u32 physical;         /* device specific (some devices
  96                                  * need a phys address of the
  97                                  * actual page behind the gatt
  98                                  * table)                        */
  99 } agp_allocate;
 100
 101 typedef struct _agp_bind {
 102         int key;                /* tag of allocation            */
 103         off_t pg_start;         /* starting page to populate    */
 104 } agp_bind;
 105
 106 typedef struct _agp_unbind {
 107         int key;                /* tag of allocation            */
 108         __u32 priority;         /* priority for paging out      */
 109 } agp_unbind;
 110
 111 #else                           /* __KERNEL__ */
 112
 113 #define AGPGART_MINOR 175
 114
 115 #define AGP_UNLOCK()            up(&(agp_fe.agp_mutex));
 116 #define AGP_LOCK()              down(&(agp_fe.agp_mutex));
 117 #define AGP_LOCK_INIT()         sema_init(&(agp_fe.agp_mutex), 1)
 118
 119 #ifndef _AGP_BACKEND_H
 120 typedef struct _agp_version {
 121         u16 major;
 122         u16 minor;
 123 } agp_version;
 124
 125 #endif
 126
 127 typedef struct _agp_info {
 128         agp_version version;    /* version of the driver        */
 129         u32 bridge_id;          /* bridge vendor/device         */
 130         u32 agp_mode;           /* mode info of bridge          */
 131         off_t aper_base;        /* base of aperture             */
 132         size_t aper_size;       /* size of aperture             */
 133         size_t pg_total;        /* max pages (swap + system)    */
 134         size_t pg_system;       /* max pages (system)           */
 135         size_t pg_used;         /* current pages used           */
 136 } agp_info;
 137
 138 typedef struct _agp_setup {
 139         u32 agp_mode;           /* mode info of bridge          */
 140 } agp_setup;
 141
 142 /*
 143  * The "prot" down below needs still a "sleep" flag somehow ...
 144  */
 145 typedef struct _agp_segment {
 146         off_t pg_start;         /* starting page to populate    */
 147         size_t pg_count;        /* number of pages              */
 148         int prot;               /* prot flags for mmap          */
 149 } agp_segment;
 150
 151 typedef struct _agp_segment_priv {
 152         off_t pg_start;
 153         size_t pg_count;
 154         pgprot_t prot;
 155 } agp_segment_priv;
 156
 157 typedef struct _agp_region {
 158         pid_t pid;              /* pid of process               */
 159         size_t seg_count;       /* number of segments           */
 160         struct _agp_segment *seg_list;
 161 } agp_region;
 162
 163 typedef struct _agp_allocate {
 164         int key;                /* tag of allocation            */
 165         size_t pg_count;        /* number of pages              */
 166         u32 type;               /* 0 == normal, other devspec   */
 167         u32 physical;           /* device specific (some devices
 168                                  * need a phys address of the
 169                                  * actual page behind the gatt
 170                                  * table)                        */
 171 } agp_allocate;
 172
 173 typedef struct _agp_bind {
 174         int key;                /* tag of allocation            */
 175         off_t pg_start;         /* starting page to populate    */
 176 } agp_bind;
 177
 178 typedef struct _agp_unbind {
 179         int key;                /* tag of allocation            */
 180         u32 priority;           /* priority for paging out      */
 181 } agp_unbind;
 182
 183 typedef struct _agp_client {
 184         struct _agp_client *next;
 185         struct _agp_client *prev;
 186         pid_t pid;
 187         int num_segments;
 188         agp_segment_priv **segments;
 189 } agp_client;
 190
 191 typedef struct _agp_controller {
 192         struct _agp_controller *next;
 193         struct _agp_controller *prev;
 194         pid_t pid;
 195         int num_clients;
 196         agp_memory *pool;
 197         agp_client *clients;
 198 } agp_controller;
 199
 200 #define AGP_FF_ALLOW_CLIENT             0
 201 #define AGP_FF_ALLOW_CONTROLLER         1
 202 #define AGP_FF_IS_CLIENT                2
 203 #define AGP_FF_IS_CONTROLLER            3
 204 #define AGP_FF_IS_VALID                 4
 205
 206 typedef struct _agp_file_private {
 207         struct _agp_file_private *next;
 208         struct _agp_file_private *prev;
 209         pid_t my_pid;
 210         long access_flags;      /* long req'd for set_bit --RR */
 211 } agp_file_private;
 212
 213 struct agp_front_data {
 214         struct semaphore agp_mutex;
 215         agp_controller *current_controller;
 216         agp_controller *controllers;
 217         agp_file_private *file_priv_list;
 218         u8 used_by_controller;
 219         u8 backend_acquired;
 220 };
 221
 222 #endif                          /* __KERNEL__ */
 223
 224 #endif                          /* _AGP_H */