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Date:      Sat, 13 Jul 2019 13:46:08 -0700
From:      Marcel Flores <marcel@brickporch.com>
To:        freebsd-arm@freebsd.org
Subject:   ThunderX Networking 
Message-ID:  <340B43A0-8E12-4F8C-A7F0-844BF8A55DB8@brickporch.com>

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Hi All,

I had some time to poke around at the issue regarding:
https://lists.freebsd.org/pipermail/freebsd-arm/2019-April/019798.html

On boot, with 13-CURRENT (r349796) dmesg dumps the following message:

bgx0: Could not find Matching PHY

Which seems to come from here:
=
https://github.com/freebsd/freebsd/blob/master/sys/dev/vnic/thunder_bgx_fd=
t.c#L456

Playing around with some debugging output, it seems like the check is =
falling
through when it checks for matching device names:

=
https://github.com/freebsd/freebsd/blob/master/sys/dev/vnic/thunder_bgx_fd=
t.c#L196

But when I dump the string that it=E2=80=99s comparing to, by adding the =
following above line 196:

device_printf(bgx->dev, "Matching Names: %s to %s\n", phys_name, type);

It seems like the match is very "close", but maybe something minute is =
getting
in the way:

bgx0: Checking for length and name
bgx0: Matching names: xfi00 to xfi
bgx0: Matching names: xfi01 to xfi
bgx0: Matching names: xfi02 to xfi
bgx0: Matching names: xfi03 to xfi
bgx0: Could not find matching PHY
device_attach: bgx0 attach returned 6
bgx0: <ThunderX BGX Ethernet I/O Interface> mem =
0x87e0e1000000-0x87e0e13fffff,0x87e0e1400000-0x87e0e17fffff at device =
0.129 on pci1
bgx0: Matching names: xlaui10 to xlaui
device_attach: bgx0 attach returned 6

In particular, it seems to be failing the second part of the check, that
ensure's a "\0" or a "@" after the name.

Could this be an issue with the FDT setup for the thunderx? Maybe =
something
simple or an indicator of bigger issues?  Am I barking up the wrong =
tree? Happy
to do any further digging if anyone has any ideas!

Thanks,
-Marcel=



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