Date: Fri, 11 Mar 2011 22:42:04 +0000 (UTC) From: Marius Strobl <marius@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r219548 - head/sys/dev/sound/pcm Message-ID: <201103112242.p2BMg4pk096461@svn.freebsd.org>
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Author: marius Date: Fri Mar 11 22:42:04 2011 New Revision: 219548 URL: http://svn.freebsd.org/changeset/base/219548 Log: Allocate the sound buffer DMA memory coherent. While NetBSD typically also does this for sound drivers it's probably not necessary for all combinations of controllers and drivers. However, given that our sound drivers completely lack bus_dmamap_sync(9) calls this at least serves as a workaround when enabling use of the IOMMU streaming buffers on sparc64 and generally for arm and mips. MFC after: 2 weeks Modified: head/sys/dev/sound/pcm/buffer.c Modified: head/sys/dev/sound/pcm/buffer.c ============================================================================== --- head/sys/dev/sound/pcm/buffer.c Fri Mar 11 22:32:17 2011 (r219547) +++ head/sys/dev/sound/pcm/buffer.c Fri Mar 11 22:42:04 2011 (r219548) @@ -93,7 +93,7 @@ sndbuf_alloc(struct snd_dbuf *b, bus_dma int ret; b->dmatag = dmatag; - b->dmaflags = dmaflags | BUS_DMA_NOWAIT; + b->dmaflags = dmaflags | BUS_DMA_NOWAIT | BUS_DMA_COHERENT; b->maxsize = size; b->bufsize = b->maxsize; b->buf_addr = 0;
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