Messages in this thread | | | Date | Thu, 12 Jan 2017 15:35:03 +0000 | From | Will Deacon <> | Subject | Re: [PATCH] arm64: Add support for DMA_ATTR_SKIP_CPU_SYNC attribute to swiotlb |
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On Wed, Jan 11, 2017 at 11:11:17AM +0100, Geert Uytterhoeven wrote: > From: Takeshi Kihara <takeshi.kihara.df@renesas.com> > > This patch adds support for DMA_ATTR_SKIP_CPU_SYNC attribute for > dma_{un}map_{page,sg} functions family to swiotlb. > > DMA_ATTR_SKIP_CPU_SYNC allows platform code to skip synchronization of > the CPU cache for the given buffer assuming that it has been already > transferred to 'device' domain. > > Ported from IOMMU .{un}map_{sg,page} ops. > > Signed-off-by: Takeshi Kihara <takeshi.kihara.df@renesas.com> > Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> > Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> > --- > v2: > - Add Acked-by. > > Support for DMA_ATTR_SKIP_CPU_SYNC was included when porting the IOMMU > ops from arm to arm64 in commit 13b8629f651164d7 ("arm64: Add IOMMU > dma_ops"). > > Presumably it was an oversight that the existing swiotlb based > implementation didn't have support for DMA_ATTR_SKIP_CPU_SYNC yet? > --- > arch/arm64/mm/dma-mapping.c | 12 ++++++++---- > 1 file changed, 8 insertions(+), 4 deletions(-)
Thanks. Applied for 4.11, with Robin's Reviewed-by.
Will
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