From: Marcelo Cerri <mhcerri@linux.vnet.ibm.com>
Date: Thu, 29 Aug 2013 14:36:35 +0000 (-0300)
Subject: crypto: nx - fix limits to sg lists for AES-GCM
X-Git-Tag: v3.12-rc1~108^2~9
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=799804348d11763b84213156318bb92cb955bfb5;p=pandora-kernel.git

crypto: nx - fix limits to sg lists for AES-GCM

This patch updates the nx-aes-gcm implementation to perform several
hyper calls if needed in order to always respect the length limits for
scatter/gather lists.

Two different limits are considered:

 - "ibm,max-sg-len": maximum number of bytes of each scatter/gather
   list.

 - "ibm,max-sync-cop":
    - The total number of bytes that a scatter/gather list can hold.
    - The maximum number of elements that a scatter/gather list can have.

Reviewed-by: Joy Latten <jmlatten@linux.vnet.ibm.com>
Signed-off-by: Marcelo Cerri <mhcerri@linux.vnet.ibm.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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