net: lan966x: Extend FDB to support also lag

Offload FDB entries when the original device is a lag interface. Because
all the ports under the lag have the same chip id, which is the chip id
of first port, then add the entries only for the first port.
Signed-off-by: Horatiu Vultur <horatiu.vultur@microchip.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/microchip/lan966x/lan966x_fdb.c

@@ -199,6 +199,34 @@ static void lan966x_fdb_bridge_event_work(struct lan966x_fdb_event_work *fdb_wor
 	}
 }
 
+static void lan966x_fdb_lag_event_work(struct lan966x_fdb_event_work *fdb_work)
+{
+	struct switchdev_notifier_fdb_info *fdb_info;
+	struct lan966x_port *port;
+	struct lan966x *lan966x;
+
+	if (!lan966x_lag_first_port(fdb_work->orig_dev, fdb_work->dev))
+		return;
+
+	lan966x = fdb_work->lan966x;
+	port = netdev_priv(fdb_work->dev);
+	fdb_info = &fdb_work->fdb_info;
+
+	switch (fdb_work->event) {
+	case SWITCHDEV_FDB_ADD_TO_DEVICE:
+		if (!fdb_info->added_by_user)
+			break;
+		lan966x_mac_add_entry(lan966x, port, fdb_info->addr,
+				      fdb_info->vid);
+		break;
+	case SWITCHDEV_FDB_DEL_TO_DEVICE:
+		if (!fdb_info->added_by_user)
+			break;
+		lan966x_mac_del_entry(lan966x, fdb_info->addr, fdb_info->vid);
+		break;
+	}
+}
+
 static void lan966x_fdb_event_work(struct work_struct *work)
 {
 	struct lan966x_fdb_event_work *fdb_work =
@@ -208,6 +236,8 @@ static void lan966x_fdb_event_work(struct work_struct *work)
 		lan966x_fdb_port_event_work(fdb_work);
 	else if (netif_is_bridge_master(fdb_work->orig_dev))
 		lan966x_fdb_bridge_event_work(fdb_work);
+	else if (netif_is_lag_master(fdb_work->orig_dev))
+		lan966x_fdb_lag_event_work(fdb_work);
 
 	kfree(fdb_work->fdb_info.addr);
 	kfree(fdb_work);

drivers/net/ethernet/microchip/lan966x/lan966x_switchdev.c

@@ -348,6 +348,7 @@ int lan966x_port_prechangeupper(struct net_device *dev,
 			return err;
 
 		switchdev_bridge_port_unoffload(brport_dev, port, NULL, NULL);
+		lan966x_fdb_flush_workqueue(port->lan966x);
 	}
 
 	return err;