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
42 enum chipset_type {
43 NOT_SUPPORTED,
44 SUPPORTED,
45 };
46
47 struct agp_version {
48 u16 major;
49 u16 minor;
50 };
51
52 struct agp_kern_info {
53 struct agp_version version;
54 struct pci_dev *device;
55 enum chipset_type chipset;
56 unsigned long mode;
57 unsigned long 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
74 struct 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
90 extern void agp_free_memory(struct agp_memory *);
91 extern struct agp_memory *agp_allocate_memory(size_t, u32);
92 extern int agp_copy_info(struct agp_kern_info *);
93 extern int agp_bind_memory(struct agp_memory *, off_t);
94 extern int agp_unbind_memory(struct agp_memory *);
95 extern void agp_enable(u32);
96 extern int agp_backend_acquire(void);
97 extern void agp_backend_release(void);
98
99 #endif /* __KERNEL__ */
100 #endif /* _AGP_BACKEND_H */
101
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