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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 */ |