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/pci/agp_if.m,v 1.1.2.2 2003/04/12 20:38:37 murray Exp $ 27# 28 29#include <sys/bus.h> 30 31# 32# The AGP interface is used internally to the agp driver to isolate the 33# differences between various AGP chipsets into chipset mini drivers. It 34# should not be used outside the AGP driver. The kernel api for accessing 35# AGP functionality is described in <pci/agpvar.h> 36# 37INTERFACE agp; 38 39# 40# Return the current aperture size. 41# 42METHOD u_int32_t get_aperture { 43 device_t dev; 44}; 45 46# 47# Set the size of the aperture. Return EINVAL on error or 0 on success. 48# 49METHOD int set_aperture { 50 device_t dev; 51 u_int32_t aperture; 52}; 53 54# 55# Bind a single page in the AGP aperture to a given physical address. 56# The offset is a byte offset within the aperture which must be 57# aligned to an AGP page boundary. 58# 59METHOD int bind_page { 60 device_t dev; 61 vm_offset_t offset; 62 vm_offset_t physical; 63}; 64 65# 66# Unbind a single page in the AGP aperture. 67# 68METHOD int unbind_page { 69 device_t dev; 70 vm_offset_t offset; 71}; 72 73# 74# Flush the GATT TLB. This is used after a call to bind_page to 75# ensure that any mappings cached in the chipset are discarded. 76# 77METHOD void flush_tlb { 78 device_t dev; 79}; 80 81# 82# Enable the agp hardware with the relavent mode. The mode bits are 83# defined in <pci/agpreg.h> 84# 85METHOD int enable { 86 device_t dev; 87 u_int32_t mode; 88}; 89 90# 91# Allocate memory of a given type. The type is a chipset-specific 92# code which is used by certain integrated agp graphics chips 93# (basically just the i810 for now) to access special features of 94# the chipset. An opaque handle representing the memory region is 95# returned and can be used as an argument to free_memory, bind_memory 96# and unbind_memory. 97# 98# The size is specified in bytes but must be a multiple of the AGP 99# page size. 100# 101METHOD struct agp_memory * alloc_memory { 102 device_t dev; 103 int type; 104 vm_size_t size; 105}; 106 107# 108# Free a memory region previously allocated with alloc_memory. Return 109# EBUSY if the memory is bound. 110# 111METHOD int free_memory { 112 device_t dev; 113 struct agp_memory *mem; 114}; 115 116# 117# Bind a memory region to a specific byte offset within the chipset's 118# AGP aperture. This effectively defines a range of contiguous 119# physical address which alias the (possibly uncontiguous) pages in 120# the memory region. 121# 122METHOD int bind_memory { 123 device_t dev; 124 struct agp_memory *mem; 125 vm_offset_t offset; 126}; 127 128# 129# Unbind a memory region bound with bind_memory. 130# 131METHOD int unbind_memory { 132 device_t dev; 133 struct agp_memory *handle; 134}; 135