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