LXR linux-bk/include/linux/agp

   1/*
   2 * AGPGART backend specific includes. Not for userspace consumption.
   3 *
   4 * Copyright (C) 2002-2003 Dave Jones
   5 * Copyright (C) 1999 Jeff Hartmann
   6 * Copyright (C) 1999 Precision Insight, Inc.
   7 * Copyright (C) 1999 Xi Graphics, Inc.
   8 *
   9 * Permission is hereby granted, free of charge, to any person obtaining a
  10 * copy of this software and associated documentation files (the "Software"),
  11 * to deal in the Software without restriction, including without limitation
  12 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  13 * and/or sell copies of the Software, and to permit persons to whom the
  14 * Software is furnished to do so, subject to the following conditions:
  15 *
  16 * The above copyright notice and this permission notice shall be included
  17 * in all copies or substantial portions of the Software.
  18 *
  19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  20 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  21 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  22 * JEFF HARTMANN, OR ANY OTHER CONTRIBUTORS BE LIABLE FOR ANY CLAIM, 
  23 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR 
  24 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE 
  25 * OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  26 *
  27 */
  28
  29#ifndef _AGP_BACKEND_H
  30#define _AGP_BACKEND_H 1
  31
  32#ifdef __KERNEL__
  33
  34#ifndef TRUE
  35#define TRUE 1
  36#endif
  37
  38#ifndef FALSE
  39#define FALSE 0
  40#endif
  41
  42enum chipset_type {
  43        NOT_SUPPORTED,
  44        SUPPORTED,
  45};
  46
  47struct agp_version {
  48        u16 major;
  49        u16 minor;
  50};
  51
  52struct agp_kern_info {
  53        struct agp_version version;
  54        struct pci_dev *device;
  55        enum chipset_type chipset;
  56        unsigned long mode;
  57        off_t aper_base;
  58        size_t aper_size;
  59        int max_memory;         /* In pages */
  60        int current_memory;
  61        int cant_use_aperture;
  62        unsigned long page_mask;
  63        struct vm_operations_struct *vm_ops;
  64};
  65
  66/* 
  67 * The agp_memory structure has information about the block of agp memory
  68 * allocated.  A caller may manipulate the next and prev pointers to link
  69 * each allocated item into a list.  These pointers are ignored by the backend.
  70 * Everything else should never be written to, but the caller may read any of
  71 * the items to detrimine the status of this block of agp memory. 
  72 */
  73
  74struct agp_memory {
  75        int key;
  76        struct agp_memory *next;
  77        struct agp_memory *prev;
  78        size_t page_count;
  79        int num_scratch_pages;
  80        unsigned long *memory;
  81        off_t pg_start;
  82        u32 type;
  83        u32 physical;
  84        u8 is_bound;
  85        u8 is_flushed;
  86};
  87
  88#define AGP_NORMAL_MEMORY 0
  89
  90extern void agp_free_memory(struct agp_memory *);
  91extern struct agp_memory *agp_allocate_memory(size_t, u32);
  92extern int agp_copy_info(struct agp_kern_info *);
  93extern int agp_bind_memory(struct agp_memory *, off_t);
  94extern int agp_unbind_memory(struct agp_memory *);
  95extern void agp_enable(u32);
  96extern int agp_backend_acquire(void);
  97extern void agp_backend_release(void);
  98
  99/*
 100 * Interface between drm and agp code.  When agp initializes, it makes
 101 * the below structure available via inter_module_register(), drm might
 102 * use it.  Keith Owens <kaos@ocs.com.au> 28 Oct 2000.
 103 */
 104typedef struct {
 105        void                    (*free_memory)(struct agp_memory *);
 106        struct agp_memory *     (*allocate_memory)(size_t, u32);
 107        int                     (*bind_memory)(struct agp_memory *, off_t);
 108        int                     (*unbind_memory)(struct agp_memory *);
 109        void                    (*enable)(u32);
 110        int                     (*acquire)(void);
 111        void                    (*release)(void);
 112        int                     (*copy_info)(struct agp_kern_info *);
 113} drm_agp_t;
 114
 115extern const drm_agp_t *drm_agp_p;
 116
 117#endif                          /* __KERNEL__ */
 118#endif                          /* _AGP_BACKEND_H */
 119