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
  33#ifdef __KERNEL__
  34
  35#ifndef TRUE
  36#define TRUE 1
  37#endif
  38
  39#ifndef FALSE
  40#define FALSE 0
  41#endif
  42
  43enum chipset_type {
  44        NOT_SUPPORTED,
  45        SUPPORTED,
  46};
  47
  48struct agp_version {
  49        u16 major;
  50        u16 minor;
  51};
  52
  53struct agp_kern_info {
  54        struct agp_version version;
  55        struct pci_dev *device;
  56        enum chipset_type chipset;
  57        unsigned long mode;
  58        unsigned long aper_base;
  59        size_t aper_size;
  60        int max_memory;         /* In pages */
  61        int current_memory;
  62        int cant_use_aperture;
  63        unsigned long page_mask;
  64        struct vm_operations_struct *vm_ops;
  65};
  66
  67/*
  68 * The agp_memory structure has information about the block of agp memory
  69 * allocated.  A caller may manipulate the next and prev pointers to link
  70 * each allocated item into a list.  These pointers are ignored by the backend.
  71 * Everything else should never be written to, but the caller may read any of
  72 * the items to determine the status of this block of agp memory.
  73 */
  74
  75struct agp_bridge_data;
  76
  77struct agp_memory {
  78        struct agp_memory *next;
  79        struct agp_memory *prev;
  80        struct agp_bridge_data *bridge;
  81        unsigned long *memory;
  82        size_t page_count;
  83        int key;
  84        int num_scratch_pages;
  85        off_t pg_start;
  86        u32 type;
  87        u32 physical;
  88        u8 is_bound;
  89        u8 is_flushed;
  90        u8 vmalloc_flag;
  91};
  92
  93#define AGP_NORMAL_MEMORY 0
  94
  95#define AGP_USER_TYPES (1 << 16)
  96#define AGP_USER_MEMORY (AGP_USER_TYPES)
  97#define AGP_USER_CACHED_MEMORY (AGP_USER_TYPES + 1)
  98
  99extern struct agp_bridge_data *agp_bridge;
 100extern struct list_head agp_bridges;
 101
 102extern struct agp_bridge_data *(*agp_find_bridge)(struct pci_dev *);
 103
 104extern void agp_free_memory(struct agp_memory *);
 105extern struct agp_memory *agp_allocate_memory(struct agp_bridge_data *, size_t, u32);
 106extern int agp_copy_info(struct agp_bridge_data *, struct agp_kern_info *);
 107extern int agp_bind_memory(struct agp_memory *, off_t);
 108extern int agp_unbind_memory(struct agp_memory *);
 109extern void agp_enable(struct agp_bridge_data *, u32);
 110extern struct agp_bridge_data *agp_backend_acquire(struct pci_dev *);
 111extern void agp_backend_release(struct agp_bridge_data *);
 112
 113#endif                          /* __KERNEL__ */
 114#endif                          /* _AGP_BACKEND_H */
 115