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