Hi again,
On Wednesday, March 7, 2012, Christian Riesch <christian.rie...@omicron.at> wrote: > Hi, > > On Tue, Mar 6, 2012 at 9:57 AM, ravone <ravoner...@gmail.com> wrote: >> Hi All, >> >> I send many ethernet packets with my Hawkboard (~4000 packet per sec.). > > How exactly did you do this? > >> After some work time happens stop send, > > How long did it take? I'll try to reproduce this on my custom board, > so please give me a detailed description. > >> hawkboard not answer to ping. > > What is the output of ifconfig after this happens? In my case (see > commit 5d69703263d588d that is mentioned below) the overrun value in > the ifconfig output started counting up. > >> In dmesg appeared this strings: >> >> root@hawkboard:/# dmesg | tail -n 2 >> davinci_mdio davinci_mdio.0: timed out waiting for user access >> PHY: 0:07 - Link is Down >> >> root@hawkboard:/# uname -a >> Linux hawkboard 3.2.6-rt13 #1 PREEMPT RT Fri Feb 24 01:05:10 MSK 2012 >> armv5tejl unknown > > Recently, there were two patches addressing problems with > communication loss on davinci_emac. They are both in mainline: > > commit 86d8c07ff2448eb4e860e50f34ef6ee78e45c40c > Author: Sascha Hauer <s.ha...@pengutronix.de> > net/davinci: do not use all descriptors for tx packets > > commit 5d69703263d588dbb03f4e57091afd8942d96e6d > Author: Christian Riesch <christian.rie...@omicron.at> > davinci_emac: Do not free all rx dma descriptors during init > > Could you please apply these patches and try if one of them solves > this issue? Do you still see the same output in dmesg with these or > one of these patches? > >> >> Is this MDIO bug? > > There is also an issue with MDIO getting reset when a softreset is > issued to the EMAC, this is discussed in [1]. Could you try if the > hack in [2] (commenting out the softreset) changes something for you? > Thank you! > > Regards, Christian > > [1] http://linux.davincidsp.com/pipermail/davinci-linux-open-source/2012-February/023960.html > [2] http://linux.davincidsp.com/pipermail/davinci-linux-open-source/2012-February/023975.html > Ping? Did you try it? Is it working now? Christian
_______________________________________________ Davinci-linux-open-source mailing list Davinci-linux-open-source@linux.davincidsp.com http://linux.davincidsp.com/mailman/listinfo/davinci-linux-open-source
