From: Nimrod Andy <B38611@freescale.com>
Date: Tue, 30 Sep 2014 01:28:05 +0000 (+0800)
Subject: net: fec: implement rx_copybreak to improve rx performance
X-Git-Tag: fixes-against-v3.18-rc2~144^2~70
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=1b7bde6d659d30f171259cc2dfba8e5dab34e735;p=pandora-kernel.git

net: fec: implement rx_copybreak to improve rx performance

- Copy short frames and keep the buffers mapped, re-allocate skb instead of
  memory copy for long frames.
- Add support for setting/getting rx_copybreak using generic ethtool tunable

Changes V3:
* As Eric Dumazet's suggestion that removing the copybreak module parameter
  and only keep the ethtool API support for rx_copybreak.

Changes V2:
* Implements rx_copybreak
* Rx_copybreak provides module parameter to change this value
* Add tunable_ops support for rx_copybreak

Signed-off-by: Fugang Duan <B38611@freescale.com>
Signed-off-by: Frank Li <Frank.Li@freescale.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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