From: Alex Dubov <oakad@yahoo.com>
Date: Thu, 12 Apr 2007 07:05:25 +0000 (+1000)
Subject: tifm_sd: implement software scatter-gather
X-Git-Tag: v2.6.22-rc1~1032^2~27
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=13cdf48ef15befbd36f8295091b9e0f9bd322963;p=pandora-kernel.git

tifm_sd: implement software scatter-gather

It was found that delays associated with issue and completion of the commands
severely limit performance of the new, fast SD cards. To alleviate this issue
scatter-gather emulation in software is implemented for both dma and pio
transfer modes. Non-block aligned and high memory sg entries are accounted
for.

Signed-off-by: Alex Dubov <oakad@yahoo.com>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
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