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/agp_if.m,v 1.4 2007/11/12 21:51:36 jhb Exp $ 27# $DragonFly: src/sys/dev/agp/agp_if.m,v 1.4 2008/01/07 01:34:58 corecode Exp $ 28# 29 30#include <sys/bus.h> 31 32# 33# The AGP interface is used internally to the agp driver to isolate the 34# differences between various AGP chipsets into chipset mini drivers. It 35# should not be used outside the AGP driver. The kernel api for accessing 36# AGP functionality is described in <pci/agpvar.h> 37# 38INTERFACE agp; 39 40# 41# Return the current aperture size. 42# 43METHOD u_int32_t get_aperture { 44 device_t dev; 45}; 46 47# 48# Set the size of the aperture. Return EINVAL on error or 0 on success. 49# 50METHOD int set_aperture { 51 device_t dev; 52 u_int32_t aperture; 53}; 54 55# 56# Bind a single page in the AGP aperture to a given physical address. 57# The offset is a byte offset within the aperture which must be 58# aligned to an AGP page boundary. 59# 60METHOD int bind_page { 61 device_t dev; 62 vm_offset_t offset; 63 vm_offset_t physical; 64}; 65 66# 67# Unbind a single page in the AGP aperture. 68# 69METHOD int unbind_page { 70 device_t dev; 71 vm_offset_t offset; 72}; 73 74# 75# Flush the GATT TLB. This is used after a call to bind_page to 76# ensure that any mappings cached in the chipset are discarded. 77# 78METHOD void flush_tlb { 79 device_t dev; 80}; 81 82# 83# Enable the agp hardware with the relavent mode. The mode bits are 84# defined in <pci/agpreg.h> 85# 86METHOD int enable { 87 device_t dev; 88 u_int32_t mode; 89}; 90 91# 92# Allocate memory of a given type. The type is a chipset-specific 93# code which is used by certain integrated agp graphics chips 94# (basically just the i810 for now) to access special features of 95# the chipset. An opaque handle representing the memory region is 96# returned and can be used as an argument to free_memory, bind_memory 97# and unbind_memory. 98# 99# The size is specified in bytes but must be a multiple of the AGP 100# page size. 101# 102METHOD struct agp_memory * alloc_memory { 103 device_t dev; 104 int type; 105 vm_size_t size; 106}; 107 108# 109# Free a memory region previously allocated with alloc_memory. Return 110# EBUSY if the memory is bound. 111# 112METHOD int free_memory { 113 device_t dev; 114 struct agp_memory *mem; 115}; 116 117# 118# Bind a memory region to a specific byte offset within the chipset's 119# AGP aperture. This effectively defines a range of contiguous 120# physical address which alias the (possibly uncontiguous) pages in 121# the memory region. 122# 123METHOD int bind_memory { 124 device_t dev; 125 struct agp_memory *mem; 126 vm_offset_t offset; 127}; 128 129# 130# Unbind a memory region bound with bind_memory. 131# 132METHOD int unbind_memory { 133 device_t dev; 134 struct agp_memory *handle; 135}; 136