netdev - Re: tg3 pxe weirdness

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Message-ID: <1506506717.18177.136.camel@gmail.com>
Date:   Wed, 27 Sep 2017 12:05:17 +0200
From:   Berend De Schouwer <berend.de.schouwer@...il.com>
To:     Siva Reddy Kallam <siva.kallam@...adcom.com>
Cc:     Linux Netdev List <netdev@...r.kernel.org>
Subject: Re: tg3 pxe weirdness

On Mon, 2017-09-25 at 15:11 +0530, Siva Reddy Kallam wrote:
> On Fri, Sep 22, 2017 at 9:04 PM, Berend De Schouwer
> <berend.de.schouwer@...il.com> wrote:
> > On Fri, 2017-09-22 at 11:51 +0530, Siva Reddy Kallam wrote:
> > > 
> > > 
> > > Can you please share below details?
> > > 1) Model and Manufacturer of the system
> > > 2) Linux distro/kernel used?
> > 
> > 4.13.3 gets a little further, but after some more data is
> > transferred
> > the tg3 driver still crashes.  This is unfortunately before I've
> > got a
> > writeable filesystem.
> > 
> > The last line is:
> > tg3 0000:01:00.0: tg3_stop_block timed out, ofs=4c00 enable_bit=2
> > 
> > I've got some ideas to get the full dmesg.
> > 
> > As with the other kernels it works OK on 1Gbps, but not slower
> > switches.
> 
> I am suspecting with link aware mode, the clock speed could be slow
> and boot code does not
> complete within the expected time with lower link speeds. So,
> Providing a patch to override clock.
> Can you please try with attached debug patch and provide us the
> feedback with 100M link?
> If it solves this issue, we will work on proper changes.

This does work on 4.13.3 and PXE for me.

I've tested on 1 Gbps, 100 Mbps and 10 Mbps.  I've done some
preliminary testing (eg. large file copies.)