From: Govindarajulu Varadarajan <_govind@gmx.com>
Date: Mon, 23 Jun 2014 10:38:02 +0000 (+0530)
Subject: enic: Add Accelerated RFS support
X-Git-Tag: omap-for-v3.17/fixes-against-rc2~149^2~270^2~3
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a145df23ef32c7b933875f334ba28791ee75766e;p=pandora-kernel.git

enic: Add Accelerated RFS support

This patch adds supports for Accelerated Receive Flow Steering.

When the desired rx is different from current rq, for a flow, kernel calls the
driver function enic_rx_flow_steer(). enic_rx_flow_steer adds a IP-TCP/UDP
hardware filter.

Driver registers a timer function enic_flow_may_expire. This function is called
every HZ/4 seconds. In this function we check if the added filter has expired
by calling rps_may_expire_flow(). If the flow has expired, it removes the hw
filter.

As of now adaptor supports only IPv4 - TCP/UDP filters.

Signed-off-by: Govindarajulu Varadarajan <_govind@gmx.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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