2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 2000 Doug Rabson
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 * The AGP gatt uses 4k pages irrespective of the host page size.
37 #define AGP_PAGE_SIZE 4096
38 #define AGP_PAGE_SHIFT 12
41 * Macros to manipulate AGP mode words.
43 * SBA = Sideband Address Port
46 #define AGP_MODE_GET_RQ(x) (((x) & 0xff000000U) >> 24)
47 #define AGP_MODE_GET_ARQSZ(x) (((x) & 0x0000e000U) >> 13)
48 #define AGP_MODE_GET_CAL(x) (((x) & 0x00001c00U) >> 10)
49 #define AGP_MODE_GET_SBA(x) (((x) & 0x00000200U) >> 9)
50 #define AGP_MODE_GET_AGP(x) (((x) & 0x00000100U) >> 8)
51 #define AGP_MODE_GET_GART_64(x) (((x) & 0x00000080U) >> 7)
52 #define AGP_MODE_GET_OVER_4G(x) (((x) & 0x00000020U) >> 5)
53 #define AGP_MODE_GET_FW(x) (((x) & 0x00000010U) >> 4)
54 #define AGP_MODE_GET_MODE_3(x) (((x) & 0x00000008U) >> 3)
55 #define AGP_MODE_GET_RATE(x) ((x) & 0x00000007U)
56 #define AGP_MODE_SET_RQ(x,v) (((x) & ~0xff000000U) | ((v) << 24))
57 #define AGP_MODE_SET_ARQSZ(x,v) (((x) & ~0x0000e000U) | ((v) << 13))
58 #define AGP_MODE_SET_CAL(x,v) (((x) & ~0x00001c00U) | ((v) << 10))
59 #define AGP_MODE_SET_SBA(x,v) (((x) & ~0x00000200U) | ((v) << 9))
60 #define AGP_MODE_SET_AGP(x,v) (((x) & ~0x00000100U) | ((v) << 8))
61 #define AGP_MODE_SET_GART_64(x,v) (((x) & ~0x00000080U) | ((v) << 7))
62 #define AGP_MODE_SET_OVER_4G(x,v) (((x) & ~0x00000020U) | ((v) << 5))
63 #define AGP_MODE_SET_FW(x,v) (((x) & ~0x00000010U) | ((v) << 4))
64 #define AGP_MODE_SET_MODE_3(x,v) (((x) & ~0x00000008U) | ((v) << 3))
65 #define AGP_MODE_SET_RATE(x,v) (((x) & ~0x00000007U) | (v))
66 #define AGP_MODE_V2_RATE_1x 0x00000001
67 #define AGP_MODE_V2_RATE_2x 0x00000002
68 #define AGP_MODE_V2_RATE_4x 0x00000004
69 #define AGP_MODE_V3_RATE_4x 0x00000001
70 #define AGP_MODE_V3_RATE_8x 0x00000002
71 #define AGP_MODE_V3_RATE_RSVD 0x00000004
74 #define AGP_MODE_GET_4G(x) AGP_MODE_GET_OVER_4G(x)
75 #define AGP_MODE_SET_4G(x) AGP_MODE_SET_OVER_4G(x)
76 #define AGP_MODE_RATE_1x AGP_MODE_V2_RATE_1x
77 #define AGP_MODE_RATE_2x AGP_MODE_V2_RATE_2x
78 #define AGP_MODE_RATE_4x AGP_MODE_V2_RATE_4x
80 #define AGPIOC_BASE 'A'
81 #define AGPIOC_INFO _IOR (AGPIOC_BASE, 0, agp_info)
82 #define AGPIOC_ACQUIRE _IO (AGPIOC_BASE, 1)
83 #define AGPIOC_RELEASE _IO (AGPIOC_BASE, 2)
84 #define AGPIOC_SETUP _IOW (AGPIOC_BASE, 3, agp_setup)
86 #define AGPIOC_RESERVE _IOW (AGPIOC_BASE, 4, agp_region)
87 #define AGPIOC_PROTECT _IOW (AGPIOC_BASE, 5, agp_region)
89 #define AGPIOC_ALLOCATE _IOWR(AGPIOC_BASE, 6, agp_allocate)
90 #define AGPIOC_DEALLOCATE _IOW (AGPIOC_BASE, 7, int)
91 #define AGPIOC_BIND _IOW (AGPIOC_BASE, 8, agp_bind)
92 #define AGPIOC_UNBIND _IOW (AGPIOC_BASE, 9, agp_unbind)
93 #define AGPIOC_CHIPSET_FLUSH _IO (AGPIOC_BASE, 10)
95 typedef struct _agp_version {
100 typedef struct _agp_info {
101 agp_version version; /* version of the driver */
102 u_int32_t bridge_id; /* bridge vendor/device */
103 u_int32_t agp_mode; /* mode info of bridge */
104 off_t aper_base; /* base of aperture */
105 size_t aper_size; /* size of aperture */
106 size_t pg_total; /* max pages (swap + system) */
107 size_t pg_system; /* max pages (system) */
108 size_t pg_used; /* current pages used */
111 typedef struct _agp_setup {
112 u_int32_t agp_mode; /* mode info of bridge */
117 * The "prot" down below needs still a "sleep" flag somehow ...
119 typedef struct _agp_segment {
120 off_t pg_start; /* starting page to populate */
121 size_t pg_count; /* number of pages */
122 int prot; /* prot flags for mmap */
125 typedef struct _agp_region {
126 pid_t pid; /* pid of process */
127 size_t seg_count; /* number of segments */
128 struct _agp_segment *seg_list;
132 typedef struct _agp_allocate {
133 int key; /* tag of allocation */
134 size_t pg_count; /* number of pages */
135 u_int32_t type; /* 0 == normal, other devspec */
136 u_int32_t physical; /* device specific (some devices
137 * need a phys address of the
138 * actual page behind the gatt
142 typedef struct _agp_bind {
143 int key; /* tag of allocation */
144 off_t pg_start; /* starting page to populate */
147 typedef struct _agp_unbind {
148 int key; /* tag of allocation */
149 u_int32_t priority; /* priority for paging out */
152 #endif /* !_SYS_AGPIO_H_ */