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mlxsw: spectrum_dcb: Allow setting default port priority

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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: Petr Machata <petrm@mellanox.com>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Petr Machata 2019-12-29 13:48:28 +02:00 committed by David S. Miller
parent d8446884f8
commit 379a00dd21
1 changed files with 17 additions and 0 deletions
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17
drivers/net/ethernet/mellanox/mlxsw/spectrum_dcb.c
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@ -368,6 +368,17 @@ err_update_qrwe:
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);