68 lines
2.0 KiB
C
68 lines
2.0 KiB
C
/**
|
|
* \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.
|
|
*
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#include "dev/drm/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, DRM(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
|
|
contigfree(vaddr, size, DRM(M_DRM)); /* Not available on 4.x */
|
|
#endif
|
|
}
|
|
|
|
/*@}*/
|