From: Shirley Ma <mashirle@us.ibm.com>
Date: Wed, 23 Apr 2008 18:55:45 +0000 (-0700)
Subject: IPoIB: Handle 4K IB MTU for UD (datagram) mode
X-Git-Tag: v2.6.26-rc1~1032^2~10
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=bc7b3a36ba02e4053ca38653e6a753082d9add03;p=pandora-kernel.git

IPoIB: Handle 4K IB MTU for UD (datagram) mode

This patch enables IPoIB to use 4K UD messages (when the underlying
device and fabrics support a 4K MTU) by using two scatter buffers when
PAGE_SIZE is less than or equal to thhe HCA IB MTU size.  The first
buffer is for IPoIB header + GRH header, and the second buffer is the
IPoIB payload, which is 4K-4.

Signed-off-by: Shirley Ma <xma@us.ibm.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
---

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