From: Ralph Campbell <ralph.campbell@qlogic.com>
Date: Tue, 12 Dec 2006 22:27:41 +0000 (-0800)
Subject: IB: Add DMA mapping functions to allow device drivers to interpose
X-Git-Tag: v2.6.20-rc1~143^2~6
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=9b513090a3c5e4964f9ac09016c1586988abb3d5;p=pandora-kernel.git

IB: Add DMA mapping functions to allow device drivers to interpose

The QLogic InfiniPath HCAs use programmed I/O instead of HW DMA.
This patch allows a verbs device driver to interpose on DMA mapping
function calls in order to avoid relying on bus_to_virt() and
phys_to_virt() to undo the mappings created by dma_map_single(),
dma_map_sg(), etc.

Signed-off-by: Ralph Campbell <ralph.campbell@qlogic.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
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