[SRU][J:linux-bluefield][PATCH v1 0/1] mlxbf_gige: msglvl infrastructure

[David Thompson]

BugLink: https://bugs.launchpad.net/bugs/2101193

SRU Justification:

[Impact]

The mlxbf_gige driver does not utilize the msglvl infrastructure, so
there is no way to dynamically enable/disable certain debug log entries
from the driver.

[Fix]

The fix is to add logic for setting a default msglvl, providing support
for get/set of msglvl via ethtool, and updating certain driver paths
with netif_msg_XXX checks before logging of driver internals.
The driver currently supports the following msglvl settings:
  link 0x004 (set by default)
  ifup 0x020 (set by default)
  rx_status 0x800
  rx_err 0x040 (set by default)
  tx_err 0x080 (set by default)
  tx_done 0x400
  tx_queued 0x100

[Test Case]

Boot BF2/BF3 with mlxbf_gige driver containing this patch
Verify "ethtool oob_net0" shows default msglvl in output
  e.g. "Current message level: 0x000000e4 (228)
          link ifup rx_err tx_err"
Verify that dmesg output shows log entries from driver, e.g.
  mlxbf_gige MLNXBF17:00: open: start state tx_ci=0x0 tx_pi=0x0 rx_ci=0x0 rx_pi=0x0 int_mask=0x1
  mlxbf_gige MLNXBF17:00: din_drop=0x0 rx_dma=0x4000000 rx_fifo=0x0 rx_polarity=0
Verify that setting new value via "ethtool -s oob_net0 msglvl <value>"
  is reflected in output of "ethtool oob_net0"
Verify driver is fully functional after enabling various msglvl settings

[Regression Potential]
Since this is a debug feature that adds to kernel log, there is
potential for causing regression (e.g. spamming log) if the
msglvl is not set appropriately during certain test cases.

David Thompson (1):
  UBUNTU: SAUCE: mlxbf_gige: msglvl infrastructure

 .../ethernet/mellanox/mlxbf_gige/mlxbf_gige.h |  2 +
 .../mellanox/mlxbf_gige/mlxbf_gige_ethtool.c  | 14 +++++
 .../mellanox/mlxbf_gige/mlxbf_gige_main.c     | 59 +++++++++++++++++--
 .../mellanox/mlxbf_gige/mlxbf_gige_regs.h     |  1 +
 .../mellanox/mlxbf_gige/mlxbf_gige_rx.c       |  7 +++
 .../mellanox/mlxbf_gige/mlxbf_gige_tx.c       | 17 +++++-
 6 files changed, 93 insertions(+), 7 deletions(-)

-- 
2.43.2