597472167a
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.
135 lines
3.6 KiB
Objective-C
135 lines
3.6 KiB
Objective-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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#include <sys/bus.h>
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#
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# The AGP interface is used internally to the agp driver to isolate the
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# differences between various AGP chipsets into chipset mini drivers. It
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# should not be used outside the AGP driver. The kernel api for accessing
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# AGP functionality is described in <pci/agpvar,h>
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#
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INTERFACE agp;
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#
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# Return the current aperture size.
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#
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METHOD u_int32_t get_aperture {
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device_t dev;
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};
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#
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# Set the size of the aperture. Return EINVAL on error or 0 on success.
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#
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METHOD int set_aperture {
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device_t dev;
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u_int32_t aperture;
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};
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#
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# Bind a single page in the AGP aperture to a given physical address.
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# The offset is a byte offset within the aperture which must be
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# aligned to an AGP page boundary.
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#
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METHOD int bind_page {
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device_t dev;
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vm_offset_t offset;
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vm_offset_t physical;
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};
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#
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# Unbind a single page in the AGP aperture.
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#
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METHOD int unbind_page {
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device_t dev;
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vm_offset_t offset;
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};
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#
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# Flush the GATT TLB. This is used after a call to bind_page to
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# ensure that any mappings cached in the chipset are discarded.
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#
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METHOD void flush_tlb {
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device_t dev;
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};
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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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METHOD int enable {
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device_t dev;
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u_int32_t mode;
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};
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#
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# Allocate memory of a given type. The type is a chipset-specific
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# code which is used by certain integrated agp graphics chips
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# (basically just the i810 for now) to access special features of
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# the chipset. An opaque handle representing the memory region is
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# returned and can be used as an argument to free_memory, bind_memory
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# and unbind_memory.
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#
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# The size is specified in bytes but must be a multiple of the AGP
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# page size.
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#
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METHOD struct agp_memory * alloc_memory {
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device_t dev;
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int type;
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vm_size_t size;
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};
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#
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# Free a memory region previously allocated with alloc_memory. Return
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# EBUSY if the memory is bound.
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#
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METHOD int free_memory {
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device_t dev;
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struct agp_memory *mem;
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};
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#
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# Bind a memory region to a specific byte offset within the chipset's
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# AGP aperture. This effectively defines a range of contiguous
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# physical address which alias the (possibly uncontiguous) pages in
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# the memory region.
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#
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METHOD int bind_memory {
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device_t dev;
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struct agp_memory *mem;
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vm_offset_t offset;
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};
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#
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# Unbind a memory region bound with bind_memory.
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#
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METHOD int unbind_memory {
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device_t dev;
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struct agp_memory *handle;
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};
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