diff options
| author | Mark Bloch <mbloch@nvidia.com> | 2026-05-03 23:27:24 +0300 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2026-05-06 19:03:37 -0700 |
| commit | 32a72840ee300fe88e9f31dc55f9ae1dacdc8b8d (patch) | |
| tree | 4f96e66cd1abf3cc8f96acc82cb0c65e84307173 /include/linux | |
| parent | 63ec6c69e6134ce4cf5dc9acc61b49bac4916979 (diff) | |
net/mlx5: E-Switch, serialize representor lifecycle
Representor callbacks can be registered and unregistered while the
E-Switch is already in switchdev mode, and the same E-Switch may also be
reconfigured by devlink, VF changes and SF changes. Serialize these paths
with the per-E-Switch representor mutex instead of relying on ad-hoc bit
state and wait queues.
Take the representor lock around the mode transition, VF/SF representor
changes and representor ops registration. Keep mode_lock and the
representor lock unnested by using the operation flag while the mode lock
is dropped. During mode changes, drop the representor lock around the
auxiliary bus rescan because driver bind/unbind may register or unregister
representor ops.
Split representor ops registration into locked public wrappers and blocked
internal helpers, clear the ops pointer on unregister, and add nested
wrappers for the shared-FDB master IB path that registers peer
representor ops while another E-Switch representor lock is already held.
On unregister, always call __unload_reps_all_vport() before marking reps
unregistered and clearing rep_ops. The per-representor state check makes
this a no-op for types that were not loaded, so unregister no longer has
to infer load state from esw->mode.
Signed-off-by: Mark Bloch <mbloch@nvidia.com>
Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
Link: https://patch.msgid.link/20260503202726.266415-6-tariqt@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/mlx5/eswitch.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/include/linux/mlx5/eswitch.h b/include/linux/mlx5/eswitch.h index 3b29a3c6794d..a0dd162baa78 100644 --- a/include/linux/mlx5/eswitch.h +++ b/include/linux/mlx5/eswitch.h @@ -63,7 +63,13 @@ struct mlx5_eswitch_rep { void mlx5_eswitch_register_vport_reps(struct mlx5_eswitch *esw, const struct mlx5_eswitch_rep_ops *ops, u8 rep_type); +void +mlx5_eswitch_register_vport_reps_nested(struct mlx5_eswitch *esw, + const struct mlx5_eswitch_rep_ops *ops, + u8 rep_type); void mlx5_eswitch_unregister_vport_reps(struct mlx5_eswitch *esw, u8 rep_type); +void mlx5_eswitch_unregister_vport_reps_nested(struct mlx5_eswitch *esw, + u8 rep_type); void *mlx5_eswitch_get_proto_dev(struct mlx5_eswitch *esw, u16 vport_num, u8 rep_type); |