net/mlx5: E-Switch, Get reg_c1 value on miss

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The HW model implicitly decapsulates tunnels on chain 0 and sets reg_c1
with the mapped tunnel id. On miss, the packet does not have the outer
header and the driver restores the tunnel information from the tunnel id.

Getting reg_c1 value in software requires enabling reg_c1 loopback and
copying reg_c1 to reg_b. reg_b comes up on CQE as cqe->imm_inval_pkey.

Use the reg_c0 restoration rules to also copy reg_c1 to reg_B.

Signed-off-by: Paul Blakey <paulb@mellanox.com>
Reviewed-by: Oz Shlomo <ozsh@mellanox.com>
Reviewed-by: Mark Bloch <markb@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>

...

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Paul Blakey 2020-02-16 12:01:35 +02:00 • committed by Saeed Mahameed

parent 0a7fcb78cc

commit 6724e66b90

2 changed files with 29 additions and 3 deletions

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1

drivers/net/ethernet/mellanox/mlx5/core/eswitch.h

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31

drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c

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