[SRU][J:linux-bluefield][PATCH v1 0/1] mlxbf_gige: pause frame counter support

[David Thompson]

BugLink: https://bugs.launchpad.net/bugs/2055086

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.

David Thompson (1):
  UBUNTU: SAUCE: mlxbf_gige: add support to display pause frame counters

 .../mellanox/mlxbf_gige/mlxbf_gige_ethtool.c  | 39 +++++++++++++++++++
 .../mellanox/mlxbf_gige/mlxbf_gige_regs.h     | 22 +++++++++++
 2 files changed, 61 insertions(+)

-- 
2.30.1