From ce514e08aa8fdbdf52da2ac2cbdace68e0b25210 Mon Sep 17 00:00:00 2001 From: Eric Anholt Date: Sat, 26 Apr 2003 22:52:39 +0000 Subject: Add PCI DMA memory functions and make addbufs_pci and associated code use it. To do this we need to save the bus address along with the virtual address in the seglist. Also fix some error handling and a few bits of whitespace. --- bsd-core/drm_pci.c | 65 ++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 65 insertions(+) create mode 100644 bsd-core/drm_pci.c (limited to 'bsd-core/drm_pci.c') diff --git a/bsd-core/drm_pci.c b/bsd-core/drm_pci.c new file mode 100644 index 00000000..aa065b64 --- /dev/null +++ b/bsd-core/drm_pci.c @@ -0,0 +1,65 @@ +/** + * \file drm_pci.h + * \brief PCI consistent, DMA-accessible memory functions. + * + * \author Eric Anholt + */ + +/* + * 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, DRM(M_DRM), M_WAITOK, 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 +} + +/*@}*/ -- cgit v1.2.3