diff options
Diffstat (limited to 'sys/dev/drm/drm_pci.c')
-rw-r--r-- | sys/dev/drm/drm_pci.c | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/sys/dev/drm/drm_pci.c b/sys/dev/drm/drm_pci.c new file mode 100644 index 0000000..0569e93 --- /dev/null +++ b/sys/dev/drm/drm_pci.c @@ -0,0 +1,69 @@ +/** + * \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, 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 +} + +/*@}*/ |