diff options
author | dfr <dfr@FreeBSD.org> | 2000-06-09 16:04:30 +0000 |
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committer | dfr <dfr@FreeBSD.org> | 2000-06-09 16:04:30 +0000 |
commit | ab33dfac0143d5afabdb2d640b8d7d47c43609f4 (patch) | |
tree | 7d9995e89a1113f6d052f26ef4daa5686f8efb76 /sys/pci/agpvar.h | |
parent | fe0cef0780df985c05e3db3351ed16ef482b7c6a (diff) | |
download | FreeBSD-src-ab33dfac0143d5afabdb2d640b8d7d47c43609f4.zip FreeBSD-src-ab33dfac0143d5afabdb2d640b8d7d47c43609f4.tar.gz |
A driver for programming the AGP hardware. This is only very lightly
tested on Intel BX chipsets only. The other agp minidrivers are totally
untested.
The programming api is a subset of the Linux api and is only intended to
be enough for the X server to use. There is also an in-kernel api for the
use of other kernel modules such as the 3D DRI.
Diffstat (limited to 'sys/pci/agpvar.h')
-rw-r--r-- | sys/pci/agpvar.h | 125 |
1 files changed, 125 insertions, 0 deletions
diff --git a/sys/pci/agpvar.h b/sys/pci/agpvar.h new file mode 100644 index 0000000..df3112b --- /dev/null +++ b/sys/pci/agpvar.h @@ -0,0 +1,125 @@ +/*- + * 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 <pci/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); + +#endif /* !_PCI_AGPVAR_H_ */ |