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net/mlx5: E-Switch, Get reg_c0 value on CQE

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On RX side create a restore table in OFFLOADS namespace.
This table will match on all values for reg_c0 we will use,
and set it to the flow_tag. This flow tag can then be read on the CQE.

As there is no copy action from reg c0 to flow tag, instead we have to
set the flow tag explictily. We add an API so callers can add all the used
reg_c0 values (tags) and for each of those we add a restore rule.

This will be used in a following patch to save the miss chain mapping
tag on reg_c0 and from it restore the tc chain on the skb.

Signed-off-by: Paul Blakey <paulb@mellanox.com>
Reviewed-by: Roi Dayan <roid@mellanox.com>
Reviewed-by: Oz Shlomo <ozsh@mellanox.com>
Reviewed-by: Mark Bloch <markb@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
This commit is contained in:
Paul Blakey
2020-02-16 12:01:27 +02:00
committed by Saeed Mahameed
parent 0f0d3827c0
commit 11b717d615
4 changed files with 156 additions and 11 deletions
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include/linux/mlx5/eswitch.h
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@@ -84,6 +84,8 @@ bool mlx5_eswitch_vport_match_metadata_enabled(const struct mlx5_eswitch *esw);
#define ESW_SOURCE_PORT_METADATA_BITS (ESW_VHCA_ID_BITS + ESW_VPORT_BITS)
#define ESW_SOURCE_PORT_METADATA_OFFSET (32 - ESW_SOURCE_PORT_METADATA_BITS)
#define ESW_CHAIN_TAG_METADATA_BITS (32 - ESW_SOURCE_PORT_METADATA_BITS)
#define ESW_CHAIN_TAG_METADATA_MASK GENMASK(ESW_CHAIN_TAG_METADATA_BITS - 1,\
0)
static inline u32 mlx5_eswitch_get_vport_metadata_mask(void)
{