netdev - Re: tg3 pxe weirdness

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Date:   Wed, 27 Sep 2017 16:01:10 +0530
From:   Siva Reddy Kallam <siva.kallam@...adcom.com>
To:     Berend De Schouwer <berend.de.schouwer@...il.com>
Cc:     Linux Netdev List <netdev@...r.kernel.org>
Subject: Re: tg3 pxe weirdness

On Wed, Sep 27, 2017 at 3:35 PM, Berend De Schouwer
<berend.de.schouwer@...il.com> wrote:
> 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.)

Good. We will work on required changes and upstream proper patch after
sanity test with multiple speeds.