netdev - Re: tg3 pxe weirdness

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Message-ID: <CAMet4B6mZ8SyCT7W2j4OBEUDiy3ZupYKWXBFti0nXoxm51_6kg@mail.gmail.com>
Date:   Mon, 25 Sep 2017 15:11:04 +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 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.

Download attachment "0001-tg3-Add-clock-override-support-for-5762.patch" of type "application/octet-stream" (2064 bytes)