From 1b7bde6d659d30f171259cc2dfba8e5dab34e735 Mon Sep 17 00:00:00 2001
From: Nimrod Andy <B38611@freescale.com>
Date: Tue, 30 Sep 2014 09:28:05 +0800
Subject: [PATCH] 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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