mlxsw: spectrum: Add packet sample offloading support

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Using the MPSC register, add the functions that configure port-based
packet sampling in hardware and the necessary datatypes in the
mlxsw_sp_port struct. In addition, add the necessary trap for sampled
packets and integrate with matchall offloading to allow offloading of the
sample tc action.

The current offload support is for the tc command:

tc filter add dev <DEV> parent ffff: \
	  matchall skip_sw \
	  action sample rate <RATE> group <GROUP> [trunc <SIZE>]

Where only ingress qdiscs are supported, and only a combination of
matchall classifier and sample action will lead to activating hardware
packet sampling.

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

...

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Yotam Gigi 2017-01-23 11:07:11 +01:00 • committed by David S. Miller

parent 0677d6828b

commit 98d0f7b9ac

3 changed files with 122 additions and 0 deletions

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111

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

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10

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

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1

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

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