net/mlx5: Introduce mapping infra for mapping unique ids to data

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Add a new interface for mapping data to a given id range (max_id),
and back again. It uses xarray as the id allocator and for finding a
given id. For locking it uses xa_lock (spin_lock) for add()/del(),
and rcu_read_lock for find().

This mapping interface also supports delaying the mapping removal via
a workqueue. This is for cases where we need the mapping to have
some grace period in regards to finding it back again, for example
for packets arriving from hardware that were marked with by a rule
with an old mapping that no longer exists.

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 12:01:25 +02:00 • committed by Saeed Mahameed

parent af699626ee

commit 7f30db1ed8

3 changed files with 246 additions and 1 deletions

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2

drivers/net/ethernet/mellanox/mlx5/core/Makefile

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218

drivers/net/ethernet/mellanox/mlx5/core/en/mapping.c

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27

drivers/net/ethernet/mellanox/mlx5/core/en/mapping.h

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