netdev - Adding Support for SG,GSO,GRO

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Message-ID: <FCCFB4CDC6E5564B9182F639FC356087035F21D9F9@dbde02.ent.ti.com>
Date:	Thu, 9 Dec 2010 16:03:29 +0530
From:	"Govindarajan, Sriramakrishnan" <srk@...com>
To:	"netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: Adding Support for SG,GSO,GRO

Hi
We have a NAPI compliant driver(net/drivers/davinci_emac.c), that does well at 10/100Mbps loads. Now the same controller/driver is used for 1000Mbps
mode as well, where the CPU gets saturated easily

Internally the module supports scatter gather DMA(which is currently not
exercised) but there is no HW checksum support.

To specifically implement GRO, GSO support would it be sufficient to add
SG support to the driver? Are there other means of increasing the throughput
and decreasing the CPU loading?

Any pointers to reference implementation for adding SG/GRO/GSO support will be helpful.

Regards
Sriram
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