1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2000 Doug Rabson 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 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. 15 * 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 26 * SUCH DAMAGE. 27 * 28 * $FreeBSD$ 29 */ 30 31 #ifndef _SYS_AGPIO_H_ 32 #define _SYS_AGPIO_H_ 33 34 /* 35 * The AGP gatt uses 4k pages irrespective of the host page size. 36 */ 37 #define AGP_PAGE_SIZE 4096 38 #define AGP_PAGE_SHIFT 12 39 40 /* 41 * Macros to manipulate AGP mode words. 42 * 43 * SBA = Sideband Address Port 44 * FW = Fast Writes 45 */ 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 72 73 /* XXX: Compat */ 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 79 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) 85 #if 0 86 #define AGPIOC_RESERVE _IOW (AGPIOC_BASE, 4, agp_region) 87 #define AGPIOC_PROTECT _IOW (AGPIOC_BASE, 5, agp_region) 88 #endif 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) 94 95 typedef struct _agp_version { 96 u_int16_t major; 97 u_int16_t minor; 98 } agp_version; 99 100 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 */ 109 } agp_info; 110 111 typedef struct _agp_setup { 112 u_int32_t agp_mode; /* mode info of bridge */ 113 } agp_setup; 114 115 #if 0 116 /* 117 * The "prot" down below needs still a "sleep" flag somehow ... 118 */ 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 */ 123 } agp_segment; 124 125 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; 129 } agp_region; 130 #endif 131 132 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 139 * table) */ 140 } agp_allocate; 141 142 typedef struct _agp_bind { 143 int key; /* tag of allocation */ 144 off_t pg_start; /* starting page to populate */ 145 } agp_bind; 146 147 typedef struct _agp_unbind { 148 int key; /* tag of allocation */ 149 u_int32_t priority; /* priority for paging out */ 150 } agp_unbind; 151 152 #endif /* !_SYS_AGPIO_H_ */ 153