nfp: flower: validate merge hint flows

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Two flows can be merged if the second flow (after recirculation) matches
on bits that are either matched on or explicitly set by the first flow.
This means that if a packet hits flow 1 and recirculates then it is
guaranteed to hit flow 2.

Add a 'can_merge' function that determines if 2 sub_flows in a merge hint
can be validly merged to a single flow.

Signed-off-by: John Hurley <john.hurley@netronome.com>
Signed-off-by: Simon Horman <simon.horman@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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John Hurley 2019-04-15 16:56:00 +02:00 • committed by David S. Miller

parent dbc2d68edc

commit 107e37bb4f

1 changed files with 228 additions and 0 deletions

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drivers/net/ethernet/netronome/nfp/flower/offload.c

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