tree 163109844167d10b714a722530ed60b81b096f9d
parent f63601fd616ab370774fa00ea10bcaaa9e48e84c
author Boris BREZILLON <boris.brezillon@free-electrons.com> 1434635181 +0200
committer Herbert Xu <herbert@gondor.apana.org.au> 1434723483 +0800

crypto: marvell/cesa - add TDMA support

The CESA IP supports CPU offload through a dedicated DMA engine (TDMA)
which can control the crypto block.
When you use this mode, all the required data (operation metadata and
payload data) are transferred using DMA, and the results are retrieved
through DMA when possible (hash results are not retrieved through DMA yet),
thus reducing the involvement of the CPU and providing better performances
in most cases (for small requests, the cost of DMA preparation might
exceed the performance gain).

Note that some CESA IPs do not embed this dedicated DMA, hence the
activation of this feature on a per platform basis.

Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Arnaud Ebalard <arno@natisbad.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>