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/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 2000 Doug Rabson
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*/
#ifndef _PCI_AGPVAR_H_
#define _PCI_AGPVAR_H_
/*
* The AGP chipset can be acquired by user or kernel code. If the
* chipset has already been acquired, it cannot be acquired by another
* user until the previous user has released it.
*/
enum agp_acquire_state {
AGP_ACQUIRE_FREE,
AGP_ACQUIRE_USER,
AGP_ACQUIRE_KERNEL
};
/*
* This structure is used to query the state of the AGP system.
*/
struct agp_info {
u_int32_t ai_mode;
vm_offset_t ai_aperture_base;
vm_size_t ai_aperture_size;
vm_size_t ai_memory_allowed;
vm_size_t ai_memory_used;
u_int32_t ai_devid;
};
struct agp_memory_info {
vm_size_t ami_size; /* size in bytes */
vm_offset_t ami_physical; /* bogus hack for i810 */
vm_offset_t ami_offset; /* page offset if bound */
int ami_is_bound; /* non-zero if bound */
};
/*
* Find the AGP device and return it.
*/
device_t agp_find_device(void);
/*
* Return the current owner of the AGP chipset.
*/
enum agp_acquire_state agp_state(device_t dev);
/*
* Query the state of the AGP system.
*/
void agp_get_info(device_t dev, struct agp_info *info);
/*
* Acquire the AGP chipset for use by the kernel. Returns EBUSY if the
* AGP chipset is already acquired by another user.
*/
int agp_acquire(device_t dev);
/*
* Release the AGP chipset.
*/
int agp_release(device_t dev);
/*
* Enable the agp hardware with the relavent mode. The mode bits are
* defined in <dev/agp/agpreg.h>
*/
int agp_enable(device_t dev, u_int32_t mode);
/*
* Allocate physical memory suitable for mapping into the AGP
* aperture. The value returned is an opaque handle which can be
* passed to agp_bind(), agp_unbind() or agp_deallocate().
*/
void *agp_alloc_memory(device_t dev, int type, vm_size_t bytes);
/*
* Free memory which was allocated with agp_allocate().
*/
void agp_free_memory(device_t dev, void *handle);
/*
* Bind memory allocated with agp_allocate() at a given offset within
* the AGP aperture. Returns EINVAL if the memory is already bound or
* the offset is not at an AGP page boundary.
*/
int agp_bind_memory(device_t dev, void *handle, vm_offset_t offset);
/*
* Unbind memory from the AGP aperture. Returns EINVAL if the memory
* is not bound.
*/
int agp_unbind_memory(device_t dev, void *handle);
/*
* Retrieve information about a memory block allocated with
* agp_alloc_memory().
*/
void agp_memory_info(device_t dev, void *handle, struct agp_memory_info *mi);
/*
* Bind a set of pages at a given offset within the AGP aperture.
* Returns EINVAL if the given size or offset is not at an AGP page boundary.
*/
int agp_bind_pages(device_t dev, vm_page_t *pages, vm_size_t size,
vm_offset_t offset);
/*
* Unbind a set of pages from the AGP aperture.
* Returns EINVAL if the given size or offset is not at an AGP page boundary.
*/
int agp_unbind_pages(device_t dev, vm_size_t size, vm_offset_t offset);
#define AGP_NORMAL_MEMORY 0
#define AGP_USER_TYPES (1 << 16)
#define AGP_USER_MEMORY (AGP_USER_TYPES)
#define AGP_USER_CACHED_MEMORY (AGP_USER_TYPES + 1)
#endif /* !_PCI_AGPVAR_H_ */
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