RE: [PATCH 10/18] ioat3: xor support
From: Sosnowski, Maciej
Date: Tue Sep 15 2009 - 12:09:44 EST
Williams, Dan J wrote:
>
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 <dan.j.williams@xxxxxxxxx>
>
---
Signed-off-by: Maciej Sosnowski <maciej.sosnowski@xxxxxxxxx>--
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