From: Dan Williams Date: Wed, 9 Sep 2009 00:42:57 +0000 (-0700) Subject: ioat3: xor support X-Git-Tag: v2.6.32-rc1~60^2^2~23 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b094ad3be564e7cc59cca4ff0256550d3a55dd3b;p=pandora-kernel.git ioat3: xor support ioat3.2 adds xor offload support for up to 8 sources. It can also perform an xor-zero-sum operation to validate whether all given sources sum to zero, without writing to a destination. Xor descriptors differ from memcpy in that one operation may require multiple descriptors depending on the number of sources. When the number of sources exceeds 5 an extended descriptor is needed. These descriptors need to be accounted for when updating the DMA_COUNT register. Signed-off-by: Dan Williams --- Reading git-diff-tree failed