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
35enum chipset_type {
36	NOT_SUPPORTED,
37	SUPPORTED,
38};
39
40struct agp_version {
41	u16 major;
42	u16 minor;
43};
44
45struct 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
67struct agp_bridge_data;
68
69struct 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
95extern struct agp_bridge_data *agp_bridge;
96extern struct list_head agp_bridges;
97
98extern struct agp_bridge_data *(*agp_find_bridge)(struct pci_dev *);
99
100extern void agp_free_memory(struct agp_memory *);
101extern struct agp_memory *agp_allocate_memory(struct agp_bridge_data *, size_t, u32);
102extern int agp_copy_info(struct agp_bridge_data *, struct agp_kern_info *);
103extern int agp_bind_memory(struct agp_memory *, off_t);
104extern int agp_unbind_memory(struct agp_memory *);
105extern void agp_enable(struct agp_bridge_data *, u32);
106extern struct agp_bridge_data *agp_backend_acquire(struct pci_dev *);
107extern void agp_backend_release(struct agp_bridge_data *);
108
109#endif				/* _AGP_BACKEND_H */
110