diff --git a/include/net/dsa.h b/include/net/dsa.h
index 4e60d2610f20..3fd8f041ddbe 100644
--- a/include/net/dsa.h
+++ b/include/net/dsa.h
@@ -147,6 +147,9 @@ struct dsa_switch_tree {
 	/* List of switch ports */
 	struct list_head ports;
 
+	/* List of configured LAGs */
+	struct list_head lags;
+
 	/* List of DSA links composing the routing table */
 	struct list_head rtable;
 };
@@ -180,6 +183,49 @@ struct dsa_mall_tc_entry {
 	};
 };
 
+struct dsa_lag {
+	struct net_device *dev;
+	int id;
+
+	struct list_head ports;
+
+	/* For multichip systems, we must ensure that each hash bucket
+	 * is only enabled on a single egress port throughout the
+	 * whole tree, lest we send duplicates. Therefore we must
+	 * maintain a global list of active tx ports, so that each
+	 * switch can figure out which buckets to enable on which
+	 * ports.
+	 */
+	struct list_head tx_ports;
+	int num_tx;
+
+	struct kref refcount;
+	struct list_head list;
+};
+
+static inline struct dsa_lag *dsa_lag_by_dev(struct dsa_switch_tree *dst,
+					     struct net_device *dev)
+{
+	struct dsa_lag *lag;
+
+	list_for_each_entry(lag, &dst->lags, list)
+		if (lag->dev == dev)
+			return lag;
+
+	return NULL;
+}
+
+static inline struct net_device *dsa_lag_dev_by_id(struct dsa_switch_tree *dst,
+						   int id)
+{
+	struct dsa_lag *lag;
+
+	list_for_each_entry_rcu(lag, &dst->lags, list)
+		if (lag->id == id)
+			return lag->dev;
+
+	return NULL;
+}
 
 struct dsa_port {
 	/* A CPU port is physically connected to a master device.
@@ -220,6 +266,9 @@ struct dsa_port {
 	bool			devlink_port_setup;
 	struct phylink		*pl;
 	struct phylink_config	pl_config;
+	struct dsa_lag		*lag;
+	struct list_head	lag_list;
+	struct list_head	lag_tx_list;
 
 	struct list_head list;
 
@@ -624,6 +673,13 @@ struct dsa_switch_ops {
 	void	(*crosschip_bridge_leave)(struct dsa_switch *ds, int tree_index,
 					  int sw_index, int port,
 					  struct net_device *br);
+	int	(*crosschip_lag_change)(struct dsa_switch *ds, int sw_index,
+					int port, struct net_device *lag_dev,
+					struct netdev_lag_lower_state_info *info);
+	int	(*crosschip_lag_join)(struct dsa_switch *ds, int sw_index,
+				      int port, struct net_device *lag_dev);
+	void	(*crosschip_lag_leave)(struct dsa_switch *ds, int sw_index,
+				       int port, struct net_device *lag_dev);
 
 	/*
 	 * PTP functionality
@@ -655,6 +711,16 @@ struct dsa_switch_ops {
 	int	(*port_change_mtu)(struct dsa_switch *ds, int port,
 				   int new_mtu);
 	int	(*port_max_mtu)(struct dsa_switch *ds, int port);
+
+	/*
+	 * LAG integration
+	 */
+	int	(*port_lag_change)(struct dsa_switch *ds, int port,
+				   struct netdev_lag_lower_state_info *info);
+	int	(*port_lag_join)(struct dsa_switch *ds, int port,
+				 struct net_device *lag_dev);
+	void	(*port_lag_leave)(struct dsa_switch *ds, int port,
+				  struct net_device *lag_dev);
 };
 
 #define DSA_DEVLINK_PARAM_DRIVER(_id, _name, _type, _cmodes)		\
diff --git a/net/dsa/dsa2.c b/net/dsa/dsa2.c
index 183003e45762..708d5a34e150 100644
--- a/net/dsa/dsa2.c
+++ b/net/dsa/dsa2.c
@@ -66,6 +66,7 @@ static struct dsa_switch_tree *dsa_tree_alloc(int index)
 	INIT_LIST_HEAD(&dst->rtable);
 
 	INIT_LIST_HEAD(&dst->ports);
+	INIT_LIST_HEAD(&dst->lags);
 
 	INIT_LIST_HEAD(&dst->list);
 	list_add_tail(&dst->list, &dsa_tree_list);
@@ -659,6 +660,8 @@ static struct dsa_port *dsa_port_touch(struct dsa_switch *ds, int index)
 	dp->index = index;
 
 	INIT_LIST_HEAD(&dp->list);
+	INIT_LIST_HEAD(&dp->lag_list);
+	INIT_LIST_HEAD(&dp->lag_tx_list);
 	list_add_tail(&dp->list, &dst->ports);
 
 	return dp;
diff --git a/net/dsa/dsa_priv.h b/net/dsa/dsa_priv.h
index 7c96aae9062c..214051f3ced0 100644
--- a/net/dsa/dsa_priv.h
+++ b/net/dsa/dsa_priv.h
@@ -20,6 +20,9 @@ enum {
 	DSA_NOTIFIER_BRIDGE_LEAVE,
 	DSA_NOTIFIER_FDB_ADD,
 	DSA_NOTIFIER_FDB_DEL,
+	DSA_NOTIFIER_LAG_CHANGE,
+	DSA_NOTIFIER_LAG_JOIN,
+	DSA_NOTIFIER_LAG_LEAVE,
 	DSA_NOTIFIER_MDB_ADD,
 	DSA_NOTIFIER_MDB_DEL,
 	DSA_NOTIFIER_VLAN_ADD,
@@ -57,6 +60,14 @@ struct dsa_notifier_mdb_info {
 	int port;
 };
 
+/* DSA_NOTIFIER_LAG_* */
+struct dsa_notifier_lag_info {
+	struct netdev_lag_lower_state_info *info;
+	struct net_device *lag;
+	int sw_index;
+	int port;
+};
+
 /* DSA_NOTIFIER_VLAN_* */
 struct dsa_notifier_vlan_info {
 	const struct switchdev_obj_port_vlan *vlan;
@@ -135,6 +146,10 @@ void dsa_port_disable_rt(struct dsa_port *dp);
 void dsa_port_disable(struct dsa_port *dp);
 int dsa_port_bridge_join(struct dsa_port *dp, struct net_device *br);
 void dsa_port_bridge_leave(struct dsa_port *dp, struct net_device *br);
+int dsa_port_lag_change(struct dsa_port *dp,
+			struct netdev_lag_lower_state_info *linfo);
+int dsa_port_lag_join(struct dsa_port *dp, struct net_device *lag_dev);
+void dsa_port_lag_leave(struct dsa_port *dp, struct net_device *lag_dev);
 int dsa_port_vlan_filtering(struct dsa_port *dp, bool vlan_filtering,
 			    struct switchdev_trans *trans);
 bool dsa_port_skip_vlan_configuration(struct dsa_port *dp);
@@ -167,6 +182,22 @@ int dsa_port_link_register_of(struct dsa_port *dp);
 void dsa_port_link_unregister_of(struct dsa_port *dp);
 extern const struct phylink_mac_ops dsa_port_phylink_mac_ops;
 
+static inline bool dsa_port_can_offload(struct dsa_port *dp,
+					struct net_device *dev)
+{
+	/* Switchdev offloading can be configured on: */
+
+	if (dev == dp->slave)
+		/* DSA ports directly connected to a bridge. */
+		return true;
+
+	if (dp->lag && dev == dp->lag->dev)
+		/* DSA ports connected to a bridge via a LAG */
+		return true;
+
+	return false;
+}
+
 /* slave.c */
 extern const struct dsa_device_ops notag_netdev_ops;
 void dsa_slave_mii_bus_init(struct dsa_switch *ds);
diff --git a/net/dsa/port.c b/net/dsa/port.c
index 73569c9af3cc..4bb8a69d7ec2 100644
--- a/net/dsa/port.c
+++ b/net/dsa/port.c
@@ -193,6 +193,149 @@ void dsa_port_bridge_leave(struct dsa_port *dp, struct net_device *br)
 	dsa_port_set_state_now(dp, BR_STATE_FORWARDING);
 }
 
+static struct dsa_lag *dsa_lag_get(struct dsa_switch_tree *dst,
+				   struct net_device *dev)
+{
+	unsigned long busy = 0;
+	struct dsa_lag *lag;
+	int id;
+
+	list_for_each_entry(lag, &dst->lags, list) {
+		set_bit(lag->id, &busy);
+
+		if (lag->dev == dev) {
+			kref_get(&lag->refcount);
+			return lag;
+		}
+	}
+
+	id = find_first_zero_bit(&busy, BITS_PER_LONG);
+	if (id >= BITS_PER_LONG)
+		return ERR_PTR(-ENOSPC);
+
+	lag = kzalloc(sizeof(*lag), GFP_KERNEL);
+	if (!lag)
+		return ERR_PTR(-ENOMEM);
+
+	kref_init(&lag->refcount);
+	lag->id = id;
+	lag->dev = dev;
+	INIT_LIST_HEAD(&lag->ports);
+	INIT_LIST_HEAD(&lag->tx_ports);
+
+	INIT_LIST_HEAD(&lag->list);
+	list_add_tail_rcu(&lag->list, &dst->lags);
+	return lag;
+}
+
+static void dsa_lag_release(struct kref *refcount)
+{
+	struct dsa_lag *lag = container_of(refcount, struct dsa_lag, refcount);
+
+	list_del_rcu(&lag->list);
+	synchronize_rcu();
+	kfree(lag);
+}
+
+static void dsa_lag_put(struct dsa_lag *lag)
+{
+	kref_put(&lag->refcount, dsa_lag_release);
+}
+
+int dsa_port_lag_change(struct dsa_port *dp,
+			struct netdev_lag_lower_state_info *linfo)
+{
+	struct dsa_notifier_lag_info info = {
+		.sw_index = dp->ds->index,
+		.port = dp->index,
+		.info = linfo,
+	};
+	bool old, new;
+
+	if (!dp->lag)
+		return 0;
+
+	info.lag = dp->lag->dev;
+
+	/* If this port is on the tx list, it is already enabled. */
+	old = !list_empty(&dp->lag_tx_list);
+
+	/* On statically configured aggregates (e.g. loadbalance
+	 * without LACP) ports will always be tx_enabled, even if the
+	 * link is down. Thus we require both link_up and tx_enabled
+	 * in order to include it in the tx set.
+	 */
+	new = linfo->link_up && linfo->tx_enabled;
+
+	if (new == old)
+		return 0;
+
+	if (new) {
+		dp->lag->num_tx++;
+		list_add_tail(&dp->lag_tx_list, &dp->lag->tx_ports);
+	} else {
+		list_del_init(&dp->lag_tx_list);
+		dp->lag->num_tx--;
+	}
+
+	return dsa_port_notify(dp, DSA_NOTIFIER_LAG_CHANGE, &info);
+}
+
+int dsa_port_lag_join(struct dsa_port *dp, struct net_device *lag_dev)
+{
+	struct dsa_notifier_lag_info info = {
+		.sw_index = dp->ds->index,
+		.port = dp->index,
+		.lag = lag_dev,
+	};
+	struct dsa_lag *lag;
+	int err;
+
+	lag = dsa_lag_get(dp->ds->dst, lag_dev);
+	if (IS_ERR(lag))
+		return PTR_ERR(lag);
+
+	dp->lag = lag;
+	list_add_tail(&dp->lag_list, &lag->ports);
+
+	err = dsa_port_notify(dp, DSA_NOTIFIER_LAG_JOIN, &info);
+	if (err) {
+		dp->lag = NULL;
+		list_del_init(&dp->lag_list);
+		dsa_lag_put(lag);
+	}
+
+	return err;
+}
+
+void dsa_port_lag_leave(struct dsa_port *dp, struct net_device *lag_dev)
+{
+	struct dsa_notifier_lag_info info = {
+		.sw_index = dp->ds->index,
+		.port = dp->index,
+		.lag = lag_dev,
+	};
+	int err;
+
+	/* Port might have been part of a LAG that in turn was
+	 * attached to a bridge.
+	 */
+	if (dp->bridge_dev)
+		dsa_port_bridge_leave(dp, dp->bridge_dev);
+
+	list_del_init(&dp->lag_list);
+	list_del_init(&dp->lag_tx_list);
+
+	err = dsa_port_notify(dp, DSA_NOTIFIER_LAG_LEAVE, &info);
+	if (err)
+		pr_err("DSA: failed to notify DSA_NOTIFIER_LAG_LEAVE: %d\n",
+		       err);
+
+	dsa_lag_put(dp->lag);
+
+	dp->lag = NULL;
+}
+
 /* Must be called under rcu_read_lock() */
 static bool dsa_port_can_apply_vlan_filtering(struct dsa_port *dp,
 					      bool vlan_filtering)
diff --git a/net/dsa/slave.c b/net/dsa/slave.c
index ff2266d2b998..ca61349886a4 100644
--- a/net/dsa/slave.c
+++ b/net/dsa/slave.c
@@ -334,7 +334,7 @@ static int dsa_slave_vlan_add(struct net_device *dev,
 	struct switchdev_obj_port_vlan vlan;
 	int vid, err;
 
-	if (obj->orig_dev != dev)
+	if (!dsa_port_can_offload(dp, obj->orig_dev))
 		return -EOPNOTSUPP;
 
 	if (dsa_port_skip_vlan_configuration(dp))
@@ -391,7 +391,7 @@ static int dsa_slave_port_obj_add(struct net_device *dev,
 
 	switch (obj->id) {
 	case SWITCHDEV_OBJ_ID_PORT_MDB:
-		if (obj->orig_dev != dev)
+		if (!dsa_port_can_offload(dp, obj->orig_dev))
 			return -EOPNOTSUPP;
 		err = dsa_port_mdb_add(dp, SWITCHDEV_OBJ_PORT_MDB(obj), trans);
 		break;
@@ -421,7 +421,7 @@ static int dsa_slave_vlan_del(struct net_device *dev,
 	struct switchdev_obj_port_vlan *vlan;
 	int vid, err;
 
-	if (obj->orig_dev != dev)
+	if (!dsa_port_can_offload(dp, obj->orig_dev))
 		return -EOPNOTSUPP;
 
 	if (dsa_port_skip_vlan_configuration(dp))
@@ -450,7 +450,7 @@ static int dsa_slave_port_obj_del(struct net_device *dev,
 
 	switch (obj->id) {
 	case SWITCHDEV_OBJ_ID_PORT_MDB:
-		if (obj->orig_dev != dev)
+		if (!dsa_port_can_offload(dp, obj->orig_dev))
 			return -EOPNOTSUPP;
 		err = dsa_port_mdb_del(dp, SWITCHDEV_OBJ_PORT_MDB(obj));
 		break;
@@ -1941,6 +1941,33 @@ static int dsa_slave_changeupper(struct net_device *dev,
 			dsa_port_bridge_leave(dp, info->upper_dev);
 			err = NOTIFY_OK;
 		}
+	} else if (netif_is_lag_master(info->upper_dev)) {
+		if (info->linking) {
+			err = dsa_port_lag_join(dp, info->upper_dev);
+			err = notifier_from_errno(err);
+		} else {
+			dsa_port_lag_leave(dp, info->upper_dev);
+			err = NOTIFY_OK;
+		}
+	}
+
+	return err;
+}
+
+static int dsa_slave_lag_changeupper(struct net_device *dev,
+				     struct netdev_notifier_changeupper_info *info)
+{
+	struct net_device *lower;
+	struct list_head *iter;
+	int err = NOTIFY_DONE;
+
+	netdev_for_each_lower_dev(dev, lower, iter) {
+		if (!dsa_slave_dev_check(lower))
+			continue;
+
+		err = dsa_slave_changeupper(lower, info);
+		if (notifier_to_errno(err))
+			break;
 	}
 
 	return err;
@@ -2038,10 +2065,26 @@ static int dsa_slave_netdevice_event(struct notifier_block *nb,
 		break;
 	}
 	case NETDEV_CHANGEUPPER:
+		if (dsa_slave_dev_check(dev))
+			return dsa_slave_changeupper(dev, ptr);
+
+		if (netif_is_lag_master(dev))
+			return dsa_slave_lag_changeupper(dev, ptr);
+
+		break;
+	case NETDEV_CHANGELOWERSTATE: {
+		struct netdev_notifier_changelowerstate_info *info = ptr;
+		struct dsa_port *dp;
+		int err;
+
 		if (!dsa_slave_dev_check(dev))
-			return NOTIFY_DONE;
+			break;
 
-		return dsa_slave_changeupper(dev, ptr);
+		dp = dsa_slave_to_port(dev);
+
+		err = dsa_port_lag_change(dp, info->lower_state_info);
+		return notifier_from_errno(err);
+	}
 	}
 
 	return NOTIFY_DONE;
diff --git a/net/dsa/switch.c b/net/dsa/switch.c
index 3fb362b6874e..3e518df7cd1f 100644
--- a/net/dsa/switch.c
+++ b/net/dsa/switch.c
@@ -178,6 +178,46 @@ static int dsa_switch_fdb_del(struct dsa_switch *ds,
 	return ds->ops->port_fdb_del(ds, port, info->addr, info->vid);
 }
 
+static int dsa_switch_lag_change(struct dsa_switch *ds,
+				 struct dsa_notifier_lag_info *info)
+{
+	if (ds->index == info->sw_index && ds->ops->port_lag_change)
+		return ds->ops->port_lag_change(ds, info->port, info->info);
+
+	if (ds->index != info->sw_index && ds->ops->crosschip_lag_change)
+		return ds->ops->crosschip_lag_change(ds, info->sw_index,
+						     info->port, info->lag,
+						     info->info);
+
+	return 0;
+}
+
+static int dsa_switch_lag_join(struct dsa_switch *ds,
+			       struct dsa_notifier_lag_info *info)
+{
+	if (ds->index == info->sw_index && ds->ops->port_lag_join)
+		return ds->ops->port_lag_join(ds, info->port, info->lag);
+
+	if (ds->index != info->sw_index && ds->ops->crosschip_lag_join)
+		return ds->ops->crosschip_lag_join(ds, info->sw_index,
+						   info->port, info->lag);
+
+	return 0;
+}
+
+static int dsa_switch_lag_leave(struct dsa_switch *ds,
+				struct dsa_notifier_lag_info *info)
+{
+	if (ds->index == info->sw_index && ds->ops->port_lag_leave)
+		ds->ops->port_lag_leave(ds, info->port, info->lag);
+
+	if (ds->index != info->sw_index && ds->ops->crosschip_lag_leave)
+		ds->ops->crosschip_lag_leave(ds, info->sw_index,
+					     info->port, info->lag);
+
+	return 0;
+}
+
 static bool dsa_switch_mdb_match(struct dsa_switch *ds, int port,
 				 struct dsa_notifier_mdb_info *info)
 {
@@ -325,6 +365,15 @@ static int dsa_switch_event(struct notifier_block *nb,
 	case DSA_NOTIFIER_FDB_DEL:
 		err = dsa_switch_fdb_del(ds, info);
 		break;
+	case DSA_NOTIFIER_LAG_CHANGE:
+		err = dsa_switch_lag_change(ds, info);
+		break;
+	case DSA_NOTIFIER_LAG_JOIN:
+		err = dsa_switch_lag_join(ds, info);
+		break;
+	case DSA_NOTIFIER_LAG_LEAVE:
+		err = dsa_switch_lag_leave(ds, info);
+		break;
 	case DSA_NOTIFIER_MDB_ADD:
 		err = dsa_switch_mdb_add(ds, info);
 		break;
