1 /*- 2 * Copyright (c) 2000 Doug Rabson 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 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. 13 * 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 24 * SUCH DAMAGE. 25 * 26 * $FreeBSD: src/sys/dev/agp/agpvar.h,v 1.4 2007/11/12 21:51:37 jhb Exp $ 27 * $DragonFly: src/sys/dev/agp/agpvar.h,v 1.4 2008/01/07 01:34:58 corecode Exp $ 28 */ 29 30 #ifndef _PCI_AGPVAR_H_ 31 #define _PCI_AGPVAR_H_ 32 33 /* 34 * The AGP chipset can be acquired by user or kernel code. If the 35 * chipset has already been acquired, it cannot be acquired by another 36 * user until the previous user has released it. 37 */ 38 enum agp_acquire_state { 39 AGP_ACQUIRE_FREE, 40 AGP_ACQUIRE_USER, 41 AGP_ACQUIRE_KERNEL 42 }; 43 44 /* 45 * This structure is used to query the state of the AGP system. 46 */ 47 struct agp_info { 48 u_int32_t ai_mode; 49 vm_offset_t ai_aperture_base; 50 vm_size_t ai_aperture_size; 51 vm_size_t ai_memory_allowed; 52 vm_size_t ai_memory_used; 53 u_int32_t ai_devid; 54 }; 55 56 struct agp_memory_info { 57 vm_size_t ami_size; /* size in bytes */ 58 vm_offset_t ami_physical; /* bogus hack for i810 */ 59 vm_offset_t ami_offset; /* page offset if bound */ 60 int ami_is_bound; /* non-zero if bound */ 61 }; 62 63 /* 64 * Find the AGP device and return it. 65 */ 66 device_t agp_find_device(void); 67 68 /* 69 * Return the current owner of the AGP chipset. 70 */ 71 enum agp_acquire_state agp_state(device_t dev); 72 73 /* 74 * Query the state of the AGP system. 75 */ 76 void agp_get_info(device_t dev, struct agp_info *info); 77 78 /* 79 * Acquire the AGP chipset for use by the kernel. Returns EBUSY if the 80 * AGP chipset is already acquired by another user. 81 */ 82 int agp_acquire(device_t dev); 83 84 /* 85 * Release the AGP chipset. 86 */ 87 int agp_release(device_t dev); 88 89 /* 90 * Enable the agp hardware with the relavent mode. The mode bits are 91 * defined in <pci/agpreg.h> 92 */ 93 int agp_enable(device_t dev, u_int32_t mode); 94 95 /* 96 * Allocate physical memory suitable for mapping into the AGP 97 * aperture. The value returned is an opaque handle which can be 98 * passed to agp_bind(), agp_unbind() or agp_deallocate(). 99 */ 100 void *agp_alloc_memory(device_t dev, int type, vm_size_t bytes); 101 102 /* 103 * Free memory which was allocated with agp_allocate(). 104 */ 105 void agp_free_memory(device_t dev, void *handle); 106 107 /* 108 * Bind memory allocated with agp_allocate() at a given offset within 109 * the AGP aperture. Returns EINVAL if the memory is already bound or 110 * the offset is not at an AGP page boundary. 111 */ 112 int agp_bind_memory(device_t dev, void *handle, vm_offset_t offset); 113 114 /* 115 * Unbind memory from the AGP aperture. Returns EINVAL if the memory 116 * is not bound. 117 */ 118 int agp_unbind_memory(device_t dev, void *handle); 119 120 /* 121 * Retrieve information about a memory block allocated with 122 * agp_alloc_memory(). 123 */ 124 void agp_memory_info(device_t dev, void *handle, struct agp_memory_info *mi); 125 126 #define AGP_NORMAL_MEMORY 0 127 128 #define AGP_USER_TYPES (1 << 16) 129 #define AGP_USER_MEMORY (AGP_USER_TYPES) 130 #define AGP_USER_CACHED_MEMORY (AGP_USER_TYPES + 1) 131 132 #endif /* !_PCI_AGPVAR_H_ */ 133