• Horia Geantă's avatar
    crypto: caam - add Derived Key Protocol (DKP) support · 7e0880b9
    Horia Geantă authored
    Offload split key generation in CAAM engine, using DKP.
    DKP is supported starting with Era 6.
    Note that the way assoclen is transmitted from the job descriptor
    to the shared descriptor changes - DPOVRD register is used instead
    of MATH3 (where available), since DKP protocol thrashes the MATH
    The replacement of MDHA split key generation with DKP has the side
    effect of the crypto engine writing the authentication key, and thus
    the DMA mapping direction for the buffer holding the key has to change
    There are two cases:
    -key is inlined in descriptor - descriptor buffer mapping changes
    -key is referenced - key buffer mapping changes
    Signed-off-by: default avatarHoria Geantă <horia.geanta@nxp.com>
    Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
key_gen.c 3.81 KB