mlxsw: spectrum_trap: Add early_drop trap

Browse source

As previously explained, packets that are dropped due to buffer related
reasons (e.g., tail drop, early drop) can be mirrored to the CPU port.
These packets are then trapped with one of the "mirror session" traps
and their CQE includes the reason for which the packet was mirrored.

Register with devlink a new trap, early_drop, and initialize the
corresponding Rx listener with the appropriate mirror reason. Return an
error in case user tries to change the traps' action, as this is not
supported.

Since Spectrum-1 does not support these traps, the above is only done
for Spectrum-2 onwards.

Signed-off-by: Petr Machata <petrm@mellanox.com>
Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

...

This commit is contained in:

Ido Schimmel 2020-08-03 19:11:39 +03:00 • committed by David S. Miller

parent 869c7be940

commit 6687e953f4

3 changed files with 53 additions and 3 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

13

drivers/net/ethernet/mellanox/mlxsw/core.h

View file

1

drivers/net/ethernet/mellanox/mlxsw/reg.h

View file

42

drivers/net/ethernet/mellanox/mlxsw/spectrum_trap.c

View file