From mboxrd@z Thu Jan 1 00:00:00 1970 From: Govindarajulu Varadarajan <_govind@gmx.com> Subject: [PATCH net-next 0/3] enic: Add support for rx_copybreak Date: Tue, 22 Jul 2014 23:01:05 +0530 Message-ID: <1406050268-13329-1-git-send-email-_govind@gmx.com> Cc: ssujith@cisco.com, benve@cisco.com, Govindarajulu Varadarajan <_govind@gmx.com> To: davem@davemloft.net, netdev@vger.kernel.org, ben@decadent.org.uk Return-path: Received: from mout.gmx.com ([74.208.4.201]:53350 "EHLO mout.gmx.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755939AbaGVRbq (ORCPT ); Tue, 22 Jul 2014 13:31:46 -0400 Sender: netdev-owner@vger.kernel.org List-ID: The following series implements rx_copybreak. dma_map_single()/dma_unmap_single() is more expensive than alloc_skb & memcpy for smaller packets. By doing this we can reuse the dma buff which is already mapped. This is very useful when iommu is on. The default skb copybreak value is 256. When iommu is on, we can go much higher than 256. All the drivers that supports rx_copybreak provides module parameter to change this value. Since module parameter is the least preferred way for changing driver values, this series adds ethtool support for setting rx_copybreak. Govindarajulu Varadarajan (3): enic: implement rx_copybreak ethtool: add rx_copybreak support enic: add ethtool support for set/get rx_copybreak drivers/net/ethernet/cisco/enic/enic.h | 1 + drivers/net/ethernet/cisco/enic/enic_ethtool.c | 31 ++++++++++++++++ drivers/net/ethernet/cisco/enic/enic_main.c | 50 ++++++++++++++++++++++++-- include/uapi/linux/ethtool.h | 2 ++ 4 files changed, 81 insertions(+), 3 deletions(-) -- 2.0.2