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 | |