LXR linux/include/linux/agp

   1/*
   2 * AGPGART backend specific includes. Not for userspace consumption.
   3 *
   4 * Copyright (C) 2004 Silicon Graphics, Inc.
   5 * Copyright (C) 2002-2003 Dave Jones
   6 * Copyright (C) 1999 Jeff Hartmann
   7 * Copyright (C) 1999 Precision Insight, Inc.
   8 * Copyright (C) 1999 Xi Graphics, Inc.
   9 *
  10 * Permission is hereby granted, free of charge, to any person obtaining a
  11 * copy of this software and associated documentation files (the "Software"),
  12 * to deal in the Software without restriction, including without limitation
  13 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  14 * and/or sell copies of the Software, and to permit persons to whom the
  15 * Software is furnished to do so, subject to the following conditions:
  16 *
  17 * The above copyright notice and this permission notice shall be included
  18 * in all copies or substantial portions of the Software.
  19 *
  20 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  21 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  22 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  23 * JEFF HARTMANN, OR ANY OTHER CONTRIBUTORS BE LIABLE FOR ANY CLAIM, 
  24 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR 
  25 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE 
  26 * OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  27 *
  28 */
  29
  30#ifndef _AGP_BACKEND_H
  31#define _AGP_BACKEND_H 1
  32
  33enum chipset_type {
  34        NOT_SUPPORTED,
  35        SUPPORTED,
  36};
  37
  38struct agp_version {
  39        u16 major;
  40        u16 minor;
  41};
  42
  43struct agp_kern_info {
  44        struct agp_version version;
  45        struct pci_dev *device;
  46        enum chipset_type chipset;
  47        unsigned long mode;
  48        unsigned long aper_base;
  49        size_t aper_size;
  50        int max_memory;         /* In pages */
  51        int current_memory;
  52        bool cant_use_aperture;
  53        unsigned long page_mask;
  54        struct vm_operations_struct *vm_ops;
  55};
  56
  57/*
  58 * The agp_memory structure has information about the block of agp memory
  59 * allocated.  A caller may manipulate the next and prev pointers to link
  60 * each allocated item into a list.  These pointers are ignored by the backend.
  61 * Everything else should never be written to, but the caller may read any of
  62 * the items to determine the status of this block of agp memory.
  63 */
  64
  65struct agp_bridge_data;
  66
  67struct agp_memory {
  68        struct agp_memory *next;
  69        struct agp_memory *prev;
  70        struct agp_bridge_data *bridge;
  71        unsigned long *memory;
  72        size_t page_count;
  73        int key;
  74        int num_scratch_pages;
  75        off_t pg_start;
  76        u32 type;
  77        u32 physical;
  78        bool is_bound;
  79        bool is_flushed;
  80        bool vmalloc_flag;
  81};
  82
  83#define AGP_NORMAL_MEMORY 0
  84
  85#define AGP_USER_TYPES (1 << 16)
  86#define AGP_USER_MEMORY (AGP_USER_TYPES)
  87#define AGP_USER_CACHED_MEMORY (AGP_USER_TYPES + 1)
  88
  89extern struct agp_bridge_data *agp_bridge;
  90extern struct list_head agp_bridges;
  91
  92extern struct agp_bridge_data *(*agp_find_bridge)(struct pci_dev *);
  93
  94extern void agp_free_memory(struct agp_memory *);
  95extern struct agp_memory *agp_allocate_memory(struct agp_bridge_data *, size_t, u32);
  96extern int agp_copy_info(struct agp_bridge_data *, struct agp_kern_info *);
  97extern int agp_bind_memory(struct agp_memory *, off_t);
  98extern int agp_unbind_memory(struct agp_memory *);
  99extern void agp_enable(struct agp_bridge_data *, u32);
 100extern struct agp_bridge_data *agp_backend_acquire(struct pci_dev *);
 101extern void agp_backend_release(struct agp_bridge_data *);
 102extern void agp_flush_chipset(struct agp_bridge_data *);
 103
 104#endif                          /* _AGP_BACKEND_H */
 105