2 * Copyright (c) 2000 Doug Rabson
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * The AGP gatt uses 4k pages irrespective of the host page size.
35 #define AGP_PAGE_SIZE 4096
36 #define AGP_PAGE_SHIFT 12
39 * Macros to manipulate AGP mode words.
41 * SBA = Sideband Address Port
44 #define AGP_MODE_GET_RQ(x) (((x) & 0xff000000U) >> 24)
45 #define AGP_MODE_GET_SBA(x) (((x) & 0x00000200U) >> 9)
46 #define AGP_MODE_GET_AGP(x) (((x) & 0x00000100U) >> 8)
47 #define AGP_MODE_GET_4G(x) (((x) & 0x00000020U) >> 5)
48 #define AGP_MODE_GET_FW(x) (((x) & 0x00000010U) >> 4)
49 #define AGP_MODE_GET_RATE(x) ((x) & 0x00000007U)
50 #define AGP_MODE_SET_RQ(x,v) (((x) & ~0xff000000U) | ((v) << 24))
51 #define AGP_MODE_SET_SBA(x,v) (((x) & ~0x00000200U) | ((v) << 9))
52 #define AGP_MODE_SET_AGP(x,v) (((x) & ~0x00000100U) | ((v) << 8))
53 #define AGP_MODE_SET_4G(x,v) (((x) & ~0x00000020U) | ((v) << 5))
54 #define AGP_MODE_SET_FW(x,v) (((x) & ~0x00000010U) | ((v) << 4))
55 #define AGP_MODE_SET_RATE(x,v) (((x) & ~0x00000007U) | (v))
56 #define AGP_MODE_RATE_1x 0x00000001
57 #define AGP_MODE_RATE_2x 0x00000002
58 #define AGP_MODE_RATE_4x 0x00000004
60 #define AGPIOC_BASE 'A'
61 #define AGPIOC_INFO _IOR (AGPIOC_BASE, 0, agp_info)
62 #define AGPIOC_ACQUIRE _IO (AGPIOC_BASE, 1)
63 #define AGPIOC_RELEASE _IO (AGPIOC_BASE, 2)
64 #define AGPIOC_SETUP _IOW (AGPIOC_BASE, 3, agp_setup)
66 #define AGPIOC_RESERVE _IOW (AGPIOC_BASE, 4, agp_region)
67 #define AGPIOC_PROTECT _IOW (AGPIOC_BASE, 5, agp_region)
69 #define AGPIOC_ALLOCATE _IOWR(AGPIOC_BASE, 6, agp_allocate)
70 #define AGPIOC_DEALLOCATE _IOW (AGPIOC_BASE, 7, int)
71 #define AGPIOC_BIND _IOW (AGPIOC_BASE, 8, agp_bind)
72 #define AGPIOC_UNBIND _IOW (AGPIOC_BASE, 9, agp_unbind)
74 typedef struct _agp_version {
79 typedef struct _agp_info {
80 agp_version version; /* version of the driver */
81 u_int32_t bridge_id; /* bridge vendor/device */
82 u_int32_t agp_mode; /* mode info of bridge */
83 off_t aper_base; /* base of aperture */
84 size_t aper_size; /* size of aperture */
85 size_t pg_total; /* max pages (swap + system) */
86 size_t pg_system; /* max pages (system) */
87 size_t pg_used; /* current pages used */
90 typedef struct _agp_setup {
91 u_int32_t agp_mode; /* mode info of bridge */
96 * The "prot" down below needs still a "sleep" flag somehow ...
98 typedef struct _agp_segment {
99 off_t pg_start; /* starting page to populate */
100 size_t pg_count; /* number of pages */
101 int prot; /* prot flags for mmap */
104 typedef struct _agp_region {
105 pid_t pid; /* pid of process */
106 size_t seg_count; /* number of segments */
107 struct _agp_segment *seg_list;
111 typedef struct _agp_allocate {
112 int key; /* tag of allocation */
113 size_t pg_count; /* number of pages */
114 u_int32_t type; /* 0 == normal, other devspec */
115 u_int32_t physical; /* device specific (some devices
116 * need a phys address of the
117 * actual page behind the gatt
121 typedef struct _agp_bind {
122 int key; /* tag of allocation */
123 off_t pg_start; /* starting page to populate */
126 typedef struct _agp_unbind {
127 int key; /* tag of allocation */
128 u_int32_t priority; /* priority for paging out */
131 #endif /* !_SYS_AGPIO_H_ */