On 01/04/2018 01:57 PM, Fabio Estevam wrote:
From: Clemens Gruber clemens.gruber@pqgruber.com
The blob_encap and blob_decap functions were not flushing the dcache before passing data to CAAM/DMA and not invalidating the dcache when getting data back. Therefore, blob encapsulation and decapsulation failed with errors like the following due to data cache incoherency: "40000006: DECO: desc idx 0: Invalid KEY command"
To ensure coherency, we allocate aligned memory to store the data passed to/from CAAM and flush/invalidate the memory regions. Blobs can now be encapsulated and decapsulated with the blob cmd as well as from board code by calling blob_encap and blob_decap directly.
Tested on an i.MX6Q board.
Signed-off-by: Clemens Gruber clemens.gruber@pqgruber.com [fabio: Make BLOB_SIZE() macro available for other archs] Signed-off-by: Fabio Estevam fabio.estevam@nxp.com Tested-by: Breno Lima breno.lima@nxp.com
Changes since v1:
- Make BLOB_SIZE() macro available for other archs
Applied to fsl-qoriq master, awaiting upstream. Thanks.
York