ixgbe: add Tx hang detection unhandled MDD

Add Tx Hang detection due to an unhandled MDD Event.

Previously, a malicious VF could disable the entire port causing
TX to hang on the E610 card.
Those events that caused PF to freeze were not detected
as an MDD event and usually required a Tx Hang watchdog timer
to catch the suspension, and perform a physical function reset.

Implement flows in the affected PF driver in such a way to check
the cause of the hang, detect it as an MDD event and log an
entry of the malicious VF that caused the Hang.

The PF blocks the malicious VF, if it continues to be the source
of several MDD events.

Reviewed-by: Przemek Kitszel <[email protected]>
Reviewed-by: Marcin Szycik <[email protected]>
Signed-off-by: Slawomir Mrozowicz <[email protected]>
Co-developed-by: Michal Swiatkowski <[email protected]>
Signed-off-by: Michal Swiatkowski <[email protected]>
Reviewed-by: Simon Horman <[email protected]>
Tested-by: Rafal Romanowski <[email protected]>
Signed-off-by: Tony Nguyen <[email protected]>

0 files changed, 0 insertions, 0 deletions