Commit 379a00dd authored by Petr Machata's avatar Petr Machata Committed by David S. Miller
Browse files

mlxsw: spectrum_dcb: Allow setting default port priority 



When APP TLV selector 1 (EtherType) is used with PID of 0, the
corresponding entry specifies "default application priority [...] when
application priority is not otherwise specified."

mlxsw currently supports this type of APP entry, but uses it only as a
fallback for unspecified DSCP rules. However non-IP traffic is prioritized
according to port-default priority, not according to the DSCP-to-prio
tables, and thus it's currently not possible to prioritize such traffic
correctly.

Extend the use of the abovementioned APP entry to also set default port
priority.

Signed-off-by: default avatarPetr Machata <petrm@mellanox.com>
Acked-by: default avatarJiri Pirko <jiri@mellanox.com>
Signed-off-by: default avatarIdo Schimmel <idosch@mellanox.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent d8446884

drivers/net/ethernet/mellanox/mlxsw/spectrum_dcb.c

+17 −0
Original line number Diff line number Diff line
@@ -368,6 +368,17 @@ mlxsw_sp_port_dcb_toggle_trust(struct mlxsw_sp_port *mlxsw_sp_port, 
	return err;

}



static int

mlxsw_sp_port_dcb_app_update_qpdp(struct mlxsw_sp_port *mlxsw_sp_port,

				  u8 default_prio)

{

	struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port->mlxsw_sp;

	char qpdp_pl[MLXSW_REG_QPDP_LEN];



	mlxsw_reg_qpdp_pack(qpdp_pl, mlxsw_sp_port->local_port, default_prio);

	return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(qpdp), qpdp_pl);

}



static int

mlxsw_sp_port_dcb_app_update_qpdpm(struct mlxsw_sp_port *mlxsw_sp_port,

				   struct dcb_ieee_app_dscp_map *map)
@@ -405,6 +416,12 @@ static int mlxsw_sp_port_dcb_app_update(struct mlxsw_sp_port *mlxsw_sp_port) 
	int err;



	default_prio = mlxsw_sp_port_dcb_app_default_prio(mlxsw_sp_port);

	err = mlxsw_sp_port_dcb_app_update_qpdp(mlxsw_sp_port, default_prio);

	if (err) {

		netdev_err(mlxsw_sp_port->dev, "Couldn't configure port default priority\n");

		return err;

	}



	have_dscp = mlxsw_sp_port_dcb_app_prio_dscp_map(mlxsw_sp_port,

							&prio_map);