** Also affects: linux-bluefield (Ubuntu Jammy)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/2055086
Title:
mlxbf_gige: add support for pause frame counters
Status in linux-bluefield package in Ubuntu:
New
Status in linux-bluefield source package in Jammy:
New
Bug description:
SRU Justification:
[Impact]
The BlueField-2 and BlueField-3 silicon designs include a
provision for reporting pause frame counters, but the driver
(mlxbf_gige) does not have software support yet.
[Fix]
The fix is to update the mlxbf_gige driver to support the
"get_pause_stats()" callback, which enables display of
pause frame counters via "ethtool -I -a ooob_net0".
The support of this callback was added to Linux kernel 5.9.0
[Test Case]
* Reboot BF platform, and configure oob_net0 interface
* Issue command "ethtool -I -a oob_net0" to display pause frame counters
* Send in multiple streams of traffic to oob_net0 interface, e.g. from
two or three simultaneous SCP operations
* Re-issue "ethtool -I -a oob_net0" and note difference in output
[Regression Potential]
The changed logic extends the ethtool support, so low risk for any
problem.
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