[PATCH net-next 14/15] net/mlx5e: Register eswitch-manager VF/SF self-port with switch-id

[Tariq Toukan <tariqt@nvidia.com>]

From: Shay Drory <shayd@nvidia.com>

A non-PF function's self-port (its own uplink netdev) was always
registered with DEVLINK_PORT_FLAVOUR_VIRTUAL, which doesn't carries
switch_id. Consequently a function that acts as an eswitch manager - a
VF (or SF) running its own nested eswitch - exposed no phys_switch_id on
its uplink netdev, so it could not be grouped with the representors it
manages.

When the function is an eswitch manager, register its self-port with the
switch_id taken from the system image guid. The uplink netdev is already
bound to this devlink port, so phys_switch_id is derived by the core,
and the managed representors - which stamp the same switch_id - group
with it.

Signed-off-by: Shay Drory <shayd@nvidia.com>
Reviewed-by: Moshe Shemesh <moshe@nvidia.com>
Reviewed-by: Mark Bloch <mbloch@nvidia.com>
Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
---
 drivers/net/ethernet/mellanox/mlx5/core/en/devlink.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en/devlink.c b/drivers/net/ethernet/mellanox/mlx5/core/en/devlink.c
index 8818f65d1fbc..79adb1ecc450 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en/devlink.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en/devlink.c
@@ -63,6 +63,11 @@ int mlx5e_devlink_port_register(struct mlx5e_dev *mlx5e_dev,
 		dl_port_index = mlx5_esw_vport_to_devlink_port_index(mdev,
 								     MLX5_VPORT_UPLINK);
 	} else {
+		if (MLX5_ESWITCH_MANAGER(mdev)) {
+			mlx5e_devlink_get_port_parent_id(mdev, &ppid);
+			memcpy(attrs.switch_id.id, ppid.id, ppid.id_len);
+			attrs.switch_id.id_len = ppid.id_len;
+		}
 		attrs.flavour = DEVLINK_PORT_FLAVOUR_VIRTUAL;
 		dl_port_index = mlx5_esw_vport_to_devlink_port_index(mdev, 0);
 	}
-- 
2.44.0