68 lines
2.0 KiB
C
68 lines
2.0 KiB
C
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/**
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* \file drm_pci.h
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* \brief PCI consistent, DMA-accessible memory functions.
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*
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* \author Eric Anholt <anholt@FreeBSD.org>
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*/
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/*
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* Copyright 2003 Eric Anholt.
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* All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHOR BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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* $FreeBSD$
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*/
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#include "dev/drm/drmP.h"
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/**********************************************************************/
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/** \name PCI memory */
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/*@{*/
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/**
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* \brief Allocate a physically contiguous DMA-accessible consistent
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* memory block.
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*/
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void *
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DRM(pci_alloc)(drm_device_t *dev, size_t size, size_t align, dma_addr_t maxaddr,
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dma_addr_t *busaddr)
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{
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void *vaddr;
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vaddr = contigmalloc(size, DRM(M_DRM), M_WAITOK, 0ul, maxaddr, align,
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0);
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*busaddr = vtophys(vaddr);
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return vaddr;
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}
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/**
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* \brief Free a DMA-accessible consistent memory block.
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*/
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void
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DRM(pci_free)(drm_device_t *dev, size_t size, void *vaddr, dma_addr_t busaddr)
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{
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#if __FreeBSD_version > 500000
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contigfree(vaddr, size, DRM(M_DRM)); /* Not available on 4.x */
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#endif
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}
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/*@}*/
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