net: dsa: b53: Add support for port_egress_floods callback

Add support for configuring the per-port egress flooding control for
both Unicast and Multicast traffic.
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/dsa/b53/b53_common.c

@@ -342,6 +342,13 @@ static void b53_set_forwarding(struct b53_device *dev, int enable)
 	b53_read8(dev, B53_CTRL_PAGE, B53_SWITCH_CTRL, &mgmt);
 	mgmt |= B53_MII_DUMB_FWDG_EN;
 	b53_write8(dev, B53_CTRL_PAGE, B53_SWITCH_CTRL, mgmt);
+
+	/* Look at B53_UC_FWD_EN and B53_MC_FWD_EN to decide whether
+	 * frames should be flooded or not.
+	 */
+	b53_read8(dev, B53_CTRL_PAGE, B53_IP_MULTICAST_CTRL, &mgmt);
+	mgmt |= B53_UC_FWD_EN | B53_MC_FWD_EN;
+	b53_write8(dev, B53_CTRL_PAGE, B53_IP_MULTICAST_CTRL, mgmt);
 }
 
 static void b53_enable_vlan(struct b53_device *dev, bool enable,
@@ -1753,6 +1760,31 @@ void b53_br_fast_age(struct dsa_switch *ds, int port)
 }
 EXPORT_SYMBOL(b53_br_fast_age);
 
+int b53_br_egress_floods(struct dsa_switch *ds, int port,
+			 bool unicast, bool multicast)
+{
+	struct b53_device *dev = ds->priv;
+	u16 uc, mc;
+
+	b53_read16(dev, B53_CTRL_PAGE, B53_UC_FWD_EN, &uc);
+	if (unicast)
+		uc |= BIT(port);
+	else
+		uc &= ~BIT(port);
+	b53_write16(dev, B53_CTRL_PAGE, B53_UC_FWD_EN, uc);
+
+	b53_read16(dev, B53_CTRL_PAGE, B53_MC_FWD_EN, &mc);
+	if (multicast)
+		mc |= BIT(port);
+	else
+		mc &= ~BIT(port);
+	b53_write16(dev, B53_CTRL_PAGE, B53_MC_FWD_EN, mc);
+
+	return 0;
+
+}
+EXPORT_SYMBOL(b53_br_egress_floods);
+
 static bool b53_possible_cpu_port(struct dsa_switch *ds, int port)
 {
 	/* Broadcom switches will accept enabling Broadcom tags on the
@@ -1953,6 +1985,7 @@ static const struct dsa_switch_ops b53_switch_ops = {
 	.port_bridge_leave	= b53_br_leave,
 	.port_stp_state_set	= b53_br_set_stp_state,
 	.port_fast_age		= b53_br_fast_age,
+	.port_egress_floods	= b53_br_egress_floods,
 	.port_vlan_filtering	= b53_vlan_filtering,
 	.port_vlan_prepare	= b53_vlan_prepare,
 	.port_vlan_add		= b53_vlan_add,

drivers/net/dsa/b53/b53_priv.h

@@ -319,6 +319,8 @@ int b53_br_join(struct dsa_switch *ds, int port, struct net_device *bridge);
 void b53_br_leave(struct dsa_switch *ds, int port, struct net_device *bridge);
 void b53_br_set_stp_state(struct dsa_switch *ds, int port, u8 state);
 void b53_br_fast_age(struct dsa_switch *ds, int port);
+int b53_br_egress_floods(struct dsa_switch *ds, int port,
+			 bool unicast, bool multicast);
 void b53_port_event(struct dsa_switch *ds, int port);
 void b53_phylink_validate(struct dsa_switch *ds, int port,
 			  unsigned long *supported,