1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 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 _PCI_AGPVAR_H_ 32 #define _PCI_AGPVAR_H_ 33 34 /* 35 * The AGP chipset can be acquired by user or kernel code. If the 36 * chipset has already been acquired, it cannot be acquired by another 37 * user until the previous user has released it. 38 */ 39 enum agp_acquire_state { 40 AGP_ACQUIRE_FREE, 41 AGP_ACQUIRE_USER, 42 AGP_ACQUIRE_KERNEL 43 }; 44 45 /* 46 * This structure is used to query the state of the AGP system. 47 */ 48 struct agp_info { 49 u_int32_t ai_mode; 50 vm_offset_t ai_aperture_base; 51 vm_size_t ai_aperture_size; 52 vm_size_t ai_memory_allowed; 53 vm_size_t ai_memory_used; 54 u_int32_t ai_devid; 55 }; 56 57 struct agp_memory_info { 58 vm_size_t ami_size; /* size in bytes */ 59 vm_offset_t ami_physical; /* bogus hack for i810 */ 60 vm_offset_t ami_offset; /* page offset if bound */ 61 int ami_is_bound; /* non-zero if bound */ 62 }; 63 64 /* 65 * Find the AGP device and return it. 66 */ 67 device_t agp_find_device(void); 68 69 /* 70 * Return the current owner of the AGP chipset. 71 */ 72 enum agp_acquire_state agp_state(device_t dev); 73 74 /* 75 * Query the state of the AGP system. 76 */ 77 void agp_get_info(device_t dev, struct agp_info *info); 78 79 /* 80 * Acquire the AGP chipset for use by the kernel. Returns EBUSY if the 81 * AGP chipset is already acquired by another user. 82 */ 83 int agp_acquire(device_t dev); 84 85 /* 86 * Release the AGP chipset. 87 */ 88 int agp_release(device_t dev); 89 90 /* 91 * Enable the agp hardware with the relavent mode. The mode bits are 92 * defined in <dev/agp/agpreg.h> 93 */ 94 int agp_enable(device_t dev, u_int32_t mode); 95 96 /* 97 * Allocate physical memory suitable for mapping into the AGP 98 * aperture. The value returned is an opaque handle which can be 99 * passed to agp_bind(), agp_unbind() or agp_deallocate(). 100 */ 101 void *agp_alloc_memory(device_t dev, int type, vm_size_t bytes); 102 103 /* 104 * Free memory which was allocated with agp_allocate(). 105 */ 106 void agp_free_memory(device_t dev, void *handle); 107 108 /* 109 * Bind memory allocated with agp_allocate() at a given offset within 110 * the AGP aperture. Returns EINVAL if the memory is already bound or 111 * the offset is not at an AGP page boundary. 112 */ 113 int agp_bind_memory(device_t dev, void *handle, vm_offset_t offset); 114 115 /* 116 * Unbind memory from the AGP aperture. Returns EINVAL if the memory 117 * is not bound. 118 */ 119 int agp_unbind_memory(device_t dev, void *handle); 120 121 /* 122 * Retrieve information about a memory block allocated with 123 * agp_alloc_memory(). 124 */ 125 void agp_memory_info(device_t dev, void *handle, struct agp_memory_info *mi); 126 127 /* 128 * Bind a set of pages at a given offset within the AGP aperture. 129 * Returns EINVAL if the given size or offset is not at an AGP page boundary. 130 */ 131 int agp_bind_pages(device_t dev, vm_page_t *pages, vm_size_t size, 132 vm_offset_t offset); 133 134 /* 135 * Unbind a set of pages from the AGP aperture. 136 * Returns EINVAL if the given size or offset is not at an AGP page boundary. 137 */ 138 int agp_unbind_pages(device_t dev, vm_size_t size, vm_offset_t offset); 139 140 #define AGP_NORMAL_MEMORY 0 141 142 #define AGP_USER_TYPES (1 << 16) 143 #define AGP_USER_MEMORY (AGP_USER_TYPES) 144 #define AGP_USER_CACHED_MEMORY (AGP_USER_TYPES + 1) 145 146 #endif /* !_PCI_AGPVAR_H_ */ 147