[Bug 232142] Chelsio T520-SO cxgbe driver no longer recognized as 10Gb

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=232142

Jason Wolfe <j at nitrology.com> changed:

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                 CC|                            |j at nitrology.com

--- Comment #4 from Jason Wolfe <j at nitrology.com> ---
This looks like it could an interoperability issue with a new firmware and an
old driver, we ran into this at Limelight. They moved over from outputting
speeds in mb to kb I believe it was, so the old driver gets confused if running
a newer firmware.

What's the sysctll output of dev.t5nex.0.firmware_version ? If you are hitting
this bug you have 2 options:

- Upgrade to a newer driver. It looks like you are running the newer version of
pfsense w FreeBSD 11.2, so it'd take you pulling the new driver into the 11.2
tree, and likely reverting a bunch of the tie in the driver has with the rest
of the kernel, like the epoch and TLS changes. This could get rough, but we did
test this and it's doable.

- Downgrade the firmware to one that's compatible with the driver. The binary
firmware blob is actually included in the driver, but by default it will only
upgrade the firmware on the card if it's newer. If you set
hw.cxgbe.fw_install="1" in loader.conf, that tells the driver it's allowed to
downgrade the firmware also. Give this a try if you'd like.

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