agpgart.h

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/*
 * AGPGART module version 0.99
 * Copyright (C) 1999 Jeff Hartmann
 * Copyright (C) 1999 Precision Insight, Inc.
 * Copyright (C) 1999 Xi Graphics, Inc.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included
 * in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * JEFF HARTMANN, OR ANY OTHER CONTRIBUTORS BE LIABLE FOR ANY CLAIM, 
 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR 
 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE 
 * OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 *
 */
#ifndef _AGP_H
#define _AGP_H 1

#include <linux/mutex.h>
#include <linux/agp_backend.h>
#include <uapi/linux/agpgart.h>

#define AGPGART_MINOR 175

struct agp_info {
    struct agp_version version; /* version of the driver        */
    u32 bridge_id;      /* bridge vendor/device         */
    u32 agp_mode;       /* mode info of bridge          */
    unsigned long 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           */
};

struct agp_setup {
    u32 agp_mode;       /* mode info of bridge          */
};

/*
 * The "prot" down below needs still a "sleep" flag somehow ...
 */
struct agp_segment {
    off_t pg_start;     /* starting page to populate    */
    size_t pg_count;    /* number of pages              */
    int prot;       /* prot flags for mmap          */
};

struct agp_segment_priv {
    off_t pg_start;
    size_t pg_count;
    pgprot_t prot;
};

struct agp_region {
    pid_t pid;      /* pid of process               */
    size_t seg_count;   /* number of segments           */
    struct agp_segment *seg_list;
};

struct agp_allocate {
    int key;        /* tag of allocation            */
    size_t pg_count;    /* number of pages              */
    u32 type;       /* 0 == normal, other devspec   */
    u32 physical;           /* device specific (some devices  
                 * need a phys address of the     
                 * actual page behind the gatt    
                 * table)                        */
};

struct agp_bind {
    int key;        /* tag of allocation            */
    off_t pg_start;     /* starting page to populate    */
};

struct agp_unbind {
    int key;        /* tag of allocation            */
    u32 priority;       /* priority for paging out      */
};

struct agp_client {
    struct agp_client *next;
    struct agp_client *prev;
    pid_t pid;
    int num_segments;
    struct agp_segment_priv **segments;
};

struct agp_controller {
    struct agp_controller *next;
    struct agp_controller *prev;
    pid_t pid;
    int num_clients;
    struct agp_memory *pool;
    struct agp_client *clients;
};

#define AGP_FF_ALLOW_CLIENT     0
#define AGP_FF_ALLOW_CONTROLLER     1
#define AGP_FF_IS_CLIENT        2
#define AGP_FF_IS_CONTROLLER        3
#define AGP_FF_IS_VALID         4

struct agp_file_private {
    struct agp_file_private *next;
    struct agp_file_private *prev;
    pid_t my_pid;
    unsigned long access_flags; /* long req'd for set_bit --RR */
};

struct agp_front_data {
    struct mutex agp_mutex;
    struct agp_controller *current_controller;
    struct agp_controller *controllers;
    struct agp_file_private *file_priv_list;
    bool used_by_controller;
    bool backend_acquired;
};

#endif              /* _AGP_H */