net: microchip: sparx5: add support for offloading default prio

Add support for offloading default prio {ETHERTYPE, 0, prio}.
Signed-off-by: NDaniel Machon <daniel.machon@microchip.com>
Signed-off-by: NPaolo Abeni <pabeni@redhat.com>

drivers/net/ethernet/microchip/sparx5/sparx5_dcb.c

@@ -49,6 +49,13 @@ static int sparx5_dcb_app_validate(struct net_device *dev,
 	int err = 0;
 
 	switch (app->selector) {
+	/* Default priority checks */
+	case IEEE_8021QAZ_APP_SEL_ETHERTYPE:
+		if (app->protocol != 0)
+			err = -EINVAL;
+		else if (app->priority >= SPX5_PRIOS)
+			err = -ERANGE;
+		break;
 	/* Dscp checks */
 	case IEEE_8021QAZ_APP_SEL_DSCP:
 		if (app->protocol >= SPARX5_PORT_QOS_DSCP_COUNT)
@@ -137,6 +144,11 @@ static int sparx5_dcb_app_update(struct net_device *dev)
 	dscp_map = &qos.dscp.map;
 	pcp_map = &qos.pcp.map;
 
+	/* Get default prio. */
+	qos.default_prio = dcb_ieee_getapp_default_prio_mask(dev);
+	if (qos.default_prio)
+		qos.default_prio = fls(qos.default_prio) - 1;
+
 	/* Get dscp ingress mapping */
 	for (i = 0; i < ARRAY_SIZE(dscp_map->map); i++) {
 		app_itr.selector = IEEE_8021QAZ_APP_SEL_DSCP;

drivers/net/ethernet/microchip/sparx5/sparx5_port.c

@@ -1151,6 +1151,7 @@ int sparx5_port_qos_set(struct sparx5_port *port,
 {
 	sparx5_port_qos_dscp_set(port, &qos->dscp);
 	sparx5_port_qos_pcp_set(port, &qos->pcp);
+	sparx5_port_qos_default_set(port, qos);
 
 	return 0;
 }
@@ -1220,3 +1221,25 @@ int sparx5_port_qos_dscp_set(const struct sparx5_port *port,
 
 	return 0;
 }
+
+int sparx5_port_qos_default_set(const struct sparx5_port *port,
+				const struct sparx5_port_qos *qos)
+{
+	struct sparx5 *sparx5 = port->sparx5;
+
+	/* Set default prio and dp level */
+	spx5_rmw(ANA_CL_QOS_CFG_DEFAULT_QOS_VAL_SET(qos->default_prio) |
+		 ANA_CL_QOS_CFG_DEFAULT_DP_VAL_SET(0),
+		 ANA_CL_QOS_CFG_DEFAULT_QOS_VAL |
+		 ANA_CL_QOS_CFG_DEFAULT_DP_VAL,
+		 sparx5, ANA_CL_QOS_CFG(port->portno));
+
+	/* Set default pcp and dei for untagged frames */
+	spx5_rmw(ANA_CL_VLAN_CTRL_PORT_PCP_SET(0) |
+		 ANA_CL_VLAN_CTRL_PORT_DEI_SET(0),
+		 ANA_CL_VLAN_CTRL_PORT_PCP |
+		 ANA_CL_VLAN_CTRL_PORT_DEI,
+		 sparx5, ANA_CL_VLAN_CTRL(port->portno));
+
+	return 0;
+}

drivers/net/ethernet/microchip/sparx5/sparx5_port.h

@@ -119,6 +119,7 @@ struct sparx5_port_qos_dscp {
 struct sparx5_port_qos {
 	struct sparx5_port_qos_pcp pcp;
 	struct sparx5_port_qos_dscp dscp;
+	u8 default_prio;
 };
 
 int sparx5_port_qos_set(struct sparx5_port *port, struct sparx5_port_qos *qos);
@@ -128,4 +129,8 @@ int sparx5_port_qos_pcp_set(const struct sparx5_port *port,
 
 int sparx5_port_qos_dscp_set(const struct sparx5_port *port,
 			     struct sparx5_port_qos_dscp *qos);
+
+int sparx5_port_qos_default_set(const struct sparx5_port *port,
+				const struct sparx5_port_qos *qos);
+
 #endif	/* __SPARX5_PORT_H__ */