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authorMarek Szyprowski <m.szyprowski@samsung.com>2011-12-23 12:30:47 +0400
committerMarek Szyprowski <m.szyprowski@samsung.com>2012-03-28 18:36:43 +0400
commit8a4134322bd429d24f71147eb59a47a981e8f63a (patch)
treebce9920c5f163669666693cd9d307bd865ad2bb1 /include/linux/dma-attrs.h
parent9adc537452e1e341cabd39a02d4788d3c510b0e2 (diff)
downloadlinux-8a4134322bd429d24f71147eb59a47a981e8f63a.tar.xz
common: DMA-mapping: add WRITE_COMBINE attribute
DMA_ATTR_WRITE_COMBINE specifies that writes to the mapping may be buffered to improve performance. It will be used by the replacement for ARM/ARV32 specific dma_alloc_writecombine() function. Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> Acked-by: Kyungmin Park <kyungmin.park@samsung.com> Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Diffstat (limited to 'include/linux/dma-attrs.h')
-rw-r--r--include/linux/dma-attrs.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/dma-attrs.h b/include/linux/dma-attrs.h
index 71ad34eca6e3..ada61e1abf29 100644
--- a/include/linux/dma-attrs.h
+++ b/include/linux/dma-attrs.h
@@ -13,6 +13,7 @@
enum dma_attr {
DMA_ATTR_WRITE_BARRIER,
DMA_ATTR_WEAK_ORDERING,
+ DMA_ATTR_WRITE_COMBINE,
DMA_ATTR_MAX,
};