mlxsw: spectrum_fid: Add hooks for RSP table maintenance

In the CFF flood mode, the driver has to allocate a table within PGT, which
holds flood vectors for router subport FIDs. For LAGs, these flood vectors
have to obviously be maintained dynamically as port membership in a LAG
changes. But even for physical ports, the flood vectors have to be kept
valid, and may not contain enabled bits corresponding to non-existent
ports. It is therefore not possible to precompute the port part of the RSP
table, it has to be maintained as ports come and go due to splits.

To support the RSP table maintenance, add to FID ops two new ops:
fid_port_init and fid_port_fini, for when a port comes to existence, or
joins a lag, and vice versa. Invoke these ops from
mlxsw_sp_port_fids_init() and mlxsw_sp_port_fids_fini(), which are called
when port is added and removed, respectively. Also add two new hooks for
LAG maintenance, mlxsw_sp_fid_port_join_lag() / _leave_lag() which
transitively call into the same ops.

Later patches will actually add the op implementations themselves, this
just adds the scaffolding.

Signed-off-by: Petr Machata <petrm@nvidia.com>
Reviewed-by: Amit Cohen <amcohen@nvidia.com>
Reviewed-by: Ido Schimmel <idosch@nvidia.com>
Link: https://lore.kernel.org/r/234398a23540317abb25f74f920a5c8121faecf0.1701183892.git.petrm@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

1 files changed, 2 insertions, 0 deletions

diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum.h b/drivers/net/ethernet/mellanox/mlxsw/spectrum.h
index 8bd1083cfd9e..61612c413310 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum.h
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum.h
@@ -1328,6 +1328,8 @@ struct mlxsw_sp_fid *mlxsw_sp_fid_dummy_get(struct mlxsw_sp *mlxsw_sp);
 void mlxsw_sp_fid_put(struct mlxsw_sp_fid *fid);
 int mlxsw_sp_port_fids_init(struct mlxsw_sp_port *mlxsw_sp_port);
 void mlxsw_sp_port_fids_fini(struct mlxsw_sp_port *mlxsw_sp_port);
+int mlxsw_sp_fid_port_join_lag(const struct mlxsw_sp_port *mlxsw_sp_port);
+void mlxsw_sp_fid_port_leave_lag(const struct mlxsw_sp_port *mlxsw_sp_port);
 
 extern const struct mlxsw_sp_fid_core_ops mlxsw_sp1_fid_core_ops;
 extern const struct mlxsw_sp_fid_core_ops mlxsw_sp2_fid_core_ops;