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net: fec: implement rx_copybreak to improve rx performance

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- 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>
This commit is contained in:
Nimrod Andy
2014-09-30 09:28:05 +08:00
committed by David S. Miller
parent ce1a4ea3f1
commit 1b7bde6d65
2 changed files with 146 additions and 66 deletions
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2
drivers/net/ethernet/freescale/fec.h
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@@ -482,6 +482,8 @@ struct fec_enet_private {
unsigned int tx_pkts_itr;
unsigned int tx_time_itr;
unsigned int itr_clk_rate;
u32 rx_copybreak;
};
void fec_ptp_init(struct platform_device *pdev);