From: Roland Dreier <rolandd@cisco.com>
Date: Sun, 18 Jun 2006 03:37:29 +0000 (-0700)
Subject: IB/srp: Use FMRs to map gather/scatter lists
X-Git-Tag: v2.6.18-rc1~1110^2~37
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f5358a172f79e3f995919224401b25637f4324f6;p=pandora-kernel.git

IB/srp: Use FMRs to map gather/scatter lists

Create an SRP FMR pool on HCAs that support FMRs, and use FMRs to map
gather/scatter lists that have more than one entry into a single
memory region that appears virtually contiguous to the SRP target
(which is the RDMA initiator).

This patch bails out on FMR mapping for SCSI commands where the
gather/scatter list cannot be mapped into a single FMR because there
are sub-page-sized entries in middle of the list.  An unaligned
start or end of the list is OK.

Based on a patch by Vu Pham <vuhuong@mellanox.com>.

Signed-off-by: Roland Dreier <rolandd@cisco.com>
---

Reading git-diff-tree failed