Virtex 4 Avnet Mini-Module Networking.

[Mohammad Sadegh Sadri]

Dear Glenn,
Dear Yoshio

I'm wondering where are the original developers of TEMAC driver these days, I have not seen any posts from any of andrei nor grant in the recent weeks. may be they are involved in other projects.

checksum off loading can be used only with SGDMA, it can also remain disabled in this mode and the CPU will compute the CSUM itself. 
Grant's kernel source tree is 2.6.21 and the latest release of EDK is 9.1SP2. these two make a good set of dev tools for building the needed systems. 

as far as I know there are some bugs in the SP1 version of edk 9.1 which makes the ethernet link unstable. In our tests the systems implemented with EDK 9.1SP1 were not able to bring up the linux root file system on NFS correctly and we always encoutered "segmentation fault" messages even when we limited the packet sizes with rsize and wsize kernel parameters.

Using EDK 9.1SP2 however ( and also the latest virtex-dev tree from grant's git tree ) we were able to bring up the root file system via NFS with exactly no problem over both of 100mbits and 1000mbits links.

However unfortunately our band width tests for the gigabit ethernet link of ML403 has not resulted any good values till now ( all of the obtained values are smaller than 40mbits/s for both of 100 and 1000 links ) we have not understood the reason for this behavior yet.

any how, the main disscussion is about avnet mini module and availability of good examples and good base systems for it. 
Basically the main question can be stated as follows:
- Is there any reference design, or example available for avnet mini-module.? 

--------------------------------------------------------------------------------
>Message: 9
>Date: Tue, 19 Jun 2007 14:06:18 -0400
>From: Glenn.G.Hart at us.westinghouse.com
>Subject: Re: Virtex 4 Avnet Mini-Module Networking.
>To: kashiwagi at co-nss.co.jp,	linuxppc-embedded at ozlabs.org
>Message-ID:
>	
>Content-Type: text/plain; charset="us-ascii"
> 
> 
>Yoshio Kashiwagi,
> 
>Yes the checksum off loading is turned off.  Should it be turned on?  My
>documentation says I need to use DMA mode to use checksum offloading.
> 
>Glenn

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