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127 lines
3.8 KiB
C
127 lines
3.8 KiB
C
/*-
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* Copyright (c) 2000 Doug Rabson
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _PCI_AGPVAR_H_
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#define _PCI_AGPVAR_H_
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/*
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* The AGP chipset can be acquired by user or kernel code. If the
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* chipset has already been acquired, it cannot be acquired by another
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* user until the previous user has released it.
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*/
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enum agp_acquire_state {
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AGP_ACQUIRE_FREE,
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AGP_ACQUIRE_USER,
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AGP_ACQUIRE_KERNEL
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};
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/*
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* This structure is used to query the state of the AGP system.
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*/
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struct agp_info {
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u_int32_t ai_mode;
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vm_offset_t ai_aperture_base;
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vm_size_t ai_aperture_size;
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vm_offset_t ai_aperture_va;
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vm_size_t ai_memory_allowed;
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vm_size_t ai_memory_used;
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u_int32_t ai_devid;
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};
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struct agp_memory_info {
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vm_size_t ami_size; /* size in bytes */
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vm_offset_t ami_physical; /* bogus hack for i810 */
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vm_offset_t ami_offset; /* page offset if bound */
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int ami_is_bound; /* non-zero if bound */
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};
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/*
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* Find the AGP device and return it.
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*/
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device_t agp_find_device(void);
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/*
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* Return the current owner of the AGP chipset.
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*/
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enum agp_acquire_state agp_state(device_t dev);
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/*
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* Query the state of the AGP system.
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*/
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void agp_get_info(device_t dev, struct agp_info *info);
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/*
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* Acquire the AGP chipset for use by the kernel. Returns EBUSY if the
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* AGP chipset is already acquired by another user.
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*/
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int agp_acquire(device_t dev);
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/*
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* Release the AGP chipset.
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*/
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int agp_release(device_t dev);
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/*
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* Enable the agp hardware with the relavent mode. The mode bits are
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* defined in <pci/agpreg.h>
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*/
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int agp_enable(device_t dev, u_int32_t mode);
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/*
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* Allocate physical memory suitable for mapping into the AGP
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* aperture. The value returned is an opaque handle which can be
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* passed to agp_bind(), agp_unbind() or agp_deallocate().
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*/
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void *agp_alloc_memory(device_t dev, int type, vm_size_t bytes);
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/*
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* Free memory which was allocated with agp_allocate().
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*/
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void agp_free_memory(device_t dev, void *handle);
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/*
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* Bind memory allocated with agp_allocate() at a given offset within
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* the AGP aperture. Returns EINVAL if the memory is already bound or
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* the offset is not at an AGP page boundary.
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*/
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int agp_bind_memory(device_t dev, void *handle, vm_offset_t offset);
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/*
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* Unbind memory from the AGP aperture. Returns EINVAL if the memory
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* is not bound.
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*/
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int agp_unbind_memory(device_t dev, void *handle);
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/*
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* Retrieve information about a memory block allocated with
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* agp_alloc_memory().
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*/
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void agp_memory_info(device_t dev, void *handle, struct agp_memory_info *mi);
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#endif /* !_PCI_AGPVAR_H_ */
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