tree 743ce60ba95bf9a5ee3cff7f664dd99a7498473e
parent da29aa8f2ab178903a1ac23ce19442f92be4f09c
author Seth Jennings <sjenning@linux.vnet.ibm.com> 1342708960 -0500
committer Herbert Xu <herbert@gondor.apana.org.au> 1343814476 +0800

powerpc/crypto: add 842 hardware compression driver

This patch adds the driver for interacting with the 842
compression accelerator on IBM Power7+ systems.

The device is a child of the Platform Facilities Option (PFO)
and shows up as a child of the IBM VIO bus.

The compression/decompression API takes the same arguments
as existing compression methods like lzo and deflate.  The 842
hardware operates on 4K hardware pages and the driver breaks up
input on 4K boundaries to submit it to the hardware accelerator.

Signed-off-by: Robert Jennings <rcj@linux.vnet.ibm.com>
Signed-off-by: Seth Jennings <sjenning@linux.vnet.ibm.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>