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