Hi Herbet,

On 2 June 2016 at 16:26, Herbert Xu [off-list ref] wrote:

On Fri, May 27, 2016 at 07:11:23PM +0800, Baolin Wang wrote:

quoted

Now some cipher hardware engines prefer to handle bulk block rather than one
sector (512 bytes) created by dm-crypt, cause these cipher engines can handle
the intermediate values (IV) by themselves in one bulk block. This means we
can increase the size of the request by merging request rather than always 512
bytes and thus increase the hardware engine processing speed.

So introduce 'CRYPTO_ALG_BULK' flag to indicate this cipher can support bulk
mode.

Signed-off-by: Baolin Wang <redacted>

I think a better aproach would be to explicitly move the IV generation
into the crypto API, similar to how we handle IPsec.  Once you do
that then every algorithm can be handled through the bulk interface.

Sorry for late reply.
If we move the IV generation into the crypto API, we also can not
handle every algorithm with the bulk interface. Cause we also need to
use different methods to map one whole bio or map one sector according
to the algorithm whether can support bulk mode or not. Please correct
me if I misunderstand your points. Thanks.

Cheers,
--
Email: Herbert Xu [off-list ref]
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt

-- 
Baolin.wang
Best Regards