1 files changed, 358 insertions, 0 deletions

diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum.c
index 159b18d60bae..e5f888f4e091 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum.c
@@ -1851,6 +1851,7 @@ static int mlxsw_sp_init(void *priv, struct mlxsw_core *mlxsw_core,
 	mlxsw_sp->core = mlxsw_core;
 	mlxsw_sp->bus_info = mlxsw_bus_info;
 	INIT_LIST_HEAD(&mlxsw_sp->port_vfids.list);
+	INIT_LIST_HEAD(&mlxsw_sp->br_vfids.list);
 
 	err = mlxsw_sp_base_mac_get(mlxsw_sp);
 	if (err) {
@@ -2259,6 +2260,9 @@ static int mlxsw_sp_port_lag_changed(struct mlxsw_sp_port *mlxsw_sp_port,
 	return mlxsw_sp_port_lag_tx_en_set(mlxsw_sp_port, info->tx_enabled);
 }
 
+static int mlxsw_sp_vport_bridge_leave(struct mlxsw_sp_port *mlxsw_sp_vport,
+				       struct net_device *br_dev);
+
 static int mlxsw_sp_port_vlan_link(struct mlxsw_sp_port *mlxsw_sp_port,
 				   struct net_device *vlan_dev)
 {
@@ -2288,6 +2292,17 @@ static int mlxsw_sp_port_vlan_unlink(struct mlxsw_sp_port *mlxsw_sp_port,
 		return -EINVAL;
 	}
 
+	/* When removing a VLAN device while still bridged we should first
+	 * remove it from the bridge, as we receive the bridge's notification
+	 * when the vPort is already gone.
+	 */
+	if (mlxsw_sp_vport->bridged) {
+		struct net_device *br_dev;
+
+		br_dev = mlxsw_sp_vport_br_get(mlxsw_sp_vport);
+		mlxsw_sp_vport_bridge_leave(mlxsw_sp_vport, br_dev);
+	}
+
 	mlxsw_sp_vport->dev = mlxsw_sp_port->dev;
 
 	return 0;
@@ -2431,6 +2446,346 @@ static int mlxsw_sp_netdevice_lag_event(struct net_device *lag_dev,
 	return NOTIFY_DONE;
 }
 
+static struct mlxsw_sp_vfid *
+mlxsw_sp_br_vfid_find(const struct mlxsw_sp *mlxsw_sp,
+		      const struct net_device *br_dev)
+{
+	struct mlxsw_sp_vfid *vfid;
+
+	list_for_each_entry(vfid, &mlxsw_sp->br_vfids.list, list) {
+		if (vfid->br_dev == br_dev)
+			return vfid;
+	}
+
+	return NULL;
+}
+
+static u16 mlxsw_sp_vfid_to_br_vfid(u16 vfid)
+{
+	return vfid - MLXSW_SP_VFID_PORT_MAX;
+}
+
+static u16 mlxsw_sp_br_vfid_to_vfid(u16 br_vfid)
+{
+	return MLXSW_SP_VFID_PORT_MAX + br_vfid;
+}
+
+static u16 mlxsw_sp_avail_br_vfid_get(const struct mlxsw_sp *mlxsw_sp)
+{
+	return find_first_zero_bit(mlxsw_sp->br_vfids.mapped,
+				   MLXSW_SP_VFID_BR_MAX);
+}
+
+static struct mlxsw_sp_vfid *mlxsw_sp_br_vfid_create(struct mlxsw_sp *mlxsw_sp,
+						     struct net_device *br_dev)
+{
+	struct device *dev = mlxsw_sp->bus_info->dev;
+	struct mlxsw_sp_vfid *vfid;
+	u16 n_vfid;
+	int err;
+
+	n_vfid = mlxsw_sp_br_vfid_to_vfid(mlxsw_sp_avail_br_vfid_get(mlxsw_sp));
+	if (n_vfid == MLXSW_SP_VFID_MAX) {
+		dev_err(dev, "No available vFIDs\n");
+		return ERR_PTR(-ERANGE);
+	}
+
+	err = __mlxsw_sp_vfid_create(mlxsw_sp, n_vfid);
+	if (err) {
+		dev_err(dev, "Failed to create vFID=%d\n", n_vfid);
+		return ERR_PTR(err);
+	}
+
+	vfid = kzalloc(sizeof(*vfid), GFP_KERNEL);
+	if (!vfid)
+		goto err_allocate_vfid;
+
+	vfid->vfid = n_vfid;
+	vfid->br_dev = br_dev;
+
+	list_add(&vfid->list, &mlxsw_sp->br_vfids.list);
+	set_bit(mlxsw_sp_vfid_to_br_vfid(n_vfid), mlxsw_sp->br_vfids.mapped);
+
+	return vfid;
+
+err_allocate_vfid:
+	__mlxsw_sp_vfid_destroy(mlxsw_sp, n_vfid);
+	return ERR_PTR(-ENOMEM);
+}
+
+static void mlxsw_sp_br_vfid_destroy(struct mlxsw_sp *mlxsw_sp,
+				     struct mlxsw_sp_vfid *vfid)
+{
+	u16 br_vfid = mlxsw_sp_vfid_to_br_vfid(vfid->vfid);
+
+	clear_bit(br_vfid, mlxsw_sp->br_vfids.mapped);
+	list_del(&vfid->list);
+
+	__mlxsw_sp_vfid_destroy(mlxsw_sp, vfid->vfid);
+
+	kfree(vfid);
+}
+
+static int mlxsw_sp_vport_bridge_leave(struct mlxsw_sp_port *mlxsw_sp_vport,
+				       struct net_device *br_dev)
+{
+	struct mlxsw_sp *mlxsw_sp = mlxsw_sp_vport->mlxsw_sp;
+	u16 vid = mlxsw_sp_vport_vid_get(mlxsw_sp_vport);
+	struct net_device *dev = mlxsw_sp_vport->dev;
+	struct mlxsw_sp_vfid *vfid, *new_vfid;
+	int err;
+
+	vfid = mlxsw_sp_br_vfid_find(mlxsw_sp, br_dev);
+	if (!vfid) {
+		WARN_ON(!vfid);
+		return -EINVAL;
+	}
+
+	/* We need a vFID to go back to after leaving the bridge's vFID. */
+	new_vfid = mlxsw_sp_vfid_find(mlxsw_sp, vid);
+	if (!new_vfid) {
+		new_vfid = mlxsw_sp_vfid_create(mlxsw_sp, vid);
+		if (IS_ERR(new_vfid)) {
+			netdev_err(dev, "Failed to create vFID for VID=%d\n",
+				   vid);
+			return PTR_ERR(new_vfid);
+		}
+	}
+
+	/* Invalidate existing {Port, VID} to vFID mapping and create a new
+	 * one for the new vFID.
+	 */
+	err = mlxsw_sp_port_vid_to_fid_set(mlxsw_sp_vport,
+					   MLXSW_REG_SVFA_MT_PORT_VID_TO_FID,
+					   false,
+					   mlxsw_sp_vfid_to_fid(vfid->vfid),
+					   vid);
+	if (err) {
+		netdev_err(dev, "Failed to invalidate {Port, VID} to vFID=%d mapping\n",
+			   vfid->vfid);
+		goto err_port_vid_to_fid_invalidate;
+	}
+
+	err = mlxsw_sp_port_vid_to_fid_set(mlxsw_sp_vport,
+					   MLXSW_REG_SVFA_MT_PORT_VID_TO_FID,
+					   true,
+					   mlxsw_sp_vfid_to_fid(new_vfid->vfid),
+					   vid);
+	if (err) {
+		netdev_err(dev, "Failed to map {Port, VID} to vFID=%d\n",
+			   new_vfid->vfid);
+		goto err_port_vid_to_fid_validate;
+	}
+
+	err = mlxsw_sp_port_vid_learning_set(mlxsw_sp_vport, vid, false);
+	if (err) {
+		netdev_err(dev, "Failed to disable learning\n");
+		goto err_port_vid_learning_set;
+	}
+
+	err = mlxsw_sp_vport_flood_set(mlxsw_sp_vport, vfid->vfid, false,
+				       false);
+	if (err) {
+		netdev_err(dev, "Failed clear to clear flooding\n");
+		goto err_vport_flood_set;
+	}
+
+	/* Switch between the vFIDs and destroy the old one if needed. */
+	new_vfid->nr_vports++;
+	mlxsw_sp_vport->vport.vfid = new_vfid;
+	vfid->nr_vports--;
+	if (!vfid->nr_vports)
+		mlxsw_sp_br_vfid_destroy(mlxsw_sp, vfid);
+
+	mlxsw_sp_vport->learning = 0;
+	mlxsw_sp_vport->learning_sync = 0;
+	mlxsw_sp_vport->uc_flood = 0;
+	mlxsw_sp_vport->bridged = 0;
+
+	return 0;
+
+err_vport_flood_set:
+err_port_vid_learning_set:
+err_port_vid_to_fid_validate:
+err_port_vid_to_fid_invalidate:
+	/* Rollback vFID only if new. */
+	if (!new_vfid->nr_vports)
+		mlxsw_sp_vfid_destroy(mlxsw_sp, new_vfid);
+	return err;
+}
+
+static int mlxsw_sp_vport_bridge_join(struct mlxsw_sp_port *mlxsw_sp_vport,
+				      struct net_device *br_dev)
+{
+	struct mlxsw_sp_vfid *old_vfid = mlxsw_sp_vport->vport.vfid;
+	struct mlxsw_sp *mlxsw_sp = mlxsw_sp_vport->mlxsw_sp;
+	u16 vid = mlxsw_sp_vport_vid_get(mlxsw_sp_vport);
+	struct net_device *dev = mlxsw_sp_vport->dev;
+	struct mlxsw_sp_vfid *vfid;
+	int err;
+
+	vfid = mlxsw_sp_br_vfid_find(mlxsw_sp, br_dev);
+	if (!vfid) {
+		vfid = mlxsw_sp_br_vfid_create(mlxsw_sp, br_dev);
+		if (IS_ERR(vfid)) {
+			netdev_err(dev, "Failed to create bridge vFID\n");
+			return PTR_ERR(vfid);
+		}
+	}
+
+	err = mlxsw_sp_vport_flood_set(mlxsw_sp_vport, vfid->vfid, true, false);
+	if (err) {
+		netdev_err(dev, "Failed to setup flooding for vFID=%d\n",
+			   vfid->vfid);
+		goto err_port_flood_set;
+	}
+
+	err = mlxsw_sp_port_vid_learning_set(mlxsw_sp_vport, vid, true);
+	if (err) {
+		netdev_err(dev, "Failed to enable learning\n");
+		goto err_port_vid_learning_set;
+	}
+
+	/* We need to invalidate existing {Port, VID} to vFID mapping and
+	 * create a new one for the bridge's vFID.
+	 */
+	err = mlxsw_sp_port_vid_to_fid_set(mlxsw_sp_vport,
+					   MLXSW_REG_SVFA_MT_PORT_VID_TO_FID,
+					   false,
+					   mlxsw_sp_vfid_to_fid(old_vfid->vfid),
+					   vid);
+	if (err) {
+		netdev_err(dev, "Failed to invalidate {Port, VID} to vFID=%d mapping\n",
+			   old_vfid->vfid);
+		goto err_port_vid_to_fid_invalidate;
+	}
+
+	err = mlxsw_sp_port_vid_to_fid_set(mlxsw_sp_vport,
+					   MLXSW_REG_SVFA_MT_PORT_VID_TO_FID,
+					   true,
+					   mlxsw_sp_vfid_to_fid(vfid->vfid),
+					   vid);
+	if (err) {
+		netdev_err(dev, "Failed to map {Port, VID} to vFID=%d\n",
+			   vfid->vfid);
+		goto err_port_vid_to_fid_validate;
+	}
+
+	/* Switch between the vFIDs and destroy the old one if needed. */
+	vfid->nr_vports++;
+	mlxsw_sp_vport->vport.vfid = vfid;
+	old_vfid->nr_vports--;
+	if (!old_vfid->nr_vports)
+		mlxsw_sp_vfid_destroy(mlxsw_sp, old_vfid);
+
+	mlxsw_sp_vport->learning = 1;
+	mlxsw_sp_vport->learning_sync = 1;
+	mlxsw_sp_vport->uc_flood = 1;
+	mlxsw_sp_vport->bridged = 1;
+
+	return 0;
+
+err_port_vid_to_fid_validate:
+	mlxsw_sp_port_vid_to_fid_set(mlxsw_sp_vport,
+				     MLXSW_REG_SVFA_MT_PORT_VID_TO_FID, false,
+				     mlxsw_sp_vfid_to_fid(old_vfid->vfid), vid);
+err_port_vid_to_fid_invalidate:
+	mlxsw_sp_port_vid_learning_set(mlxsw_sp_vport, vid, false);
+err_port_vid_learning_set:
+	mlxsw_sp_vport_flood_set(mlxsw_sp_vport, vfid->vfid, false, false);
+err_port_flood_set:
+	if (!vfid->nr_vports)
+		mlxsw_sp_br_vfid_destroy(mlxsw_sp, vfid);
+	return err;
+}
+
+static bool
+mlxsw_sp_port_master_bridge_check(const struct mlxsw_sp_port *mlxsw_sp_port,
+				  const struct net_device *br_dev)
+{
+	struct mlxsw_sp_port *mlxsw_sp_vport;
+
+	list_for_each_entry(mlxsw_sp_vport, &mlxsw_sp_port->vports_list,
+			    vport.list) {
+		if (mlxsw_sp_vport_br_get(mlxsw_sp_vport) == br_dev)
+			return false;
+	}
+
+	return true;
+}
+
+static int mlxsw_sp_netdevice_vport_event(struct net_device *dev,
+					  unsigned long event, void *ptr,
+					  u16 vid)
+{
+	struct mlxsw_sp_port *mlxsw_sp_port = netdev_priv(dev);
+	struct netdev_notifier_changeupper_info *info = ptr;
+	struct mlxsw_sp_port *mlxsw_sp_vport;
+	struct net_device *upper_dev;
+	int err;
+
+	mlxsw_sp_vport = mlxsw_sp_port_vport_find(mlxsw_sp_port, vid);
+
+	switch (event) {
+	case NETDEV_PRECHANGEUPPER:
+		upper_dev = info->upper_dev;
+		if (!info->master || !info->linking)
+			break;
+		if (!netif_is_bridge_master(upper_dev))
+			return NOTIFY_BAD;
+		/* We can't have multiple VLAN interfaces configured on
+		 * the same port and being members in the same bridge.
+		 */
+		if (!mlxsw_sp_port_master_bridge_check(mlxsw_sp_port,
+						       upper_dev))
+			return NOTIFY_BAD;
+		break;
+	case NETDEV_CHANGEUPPER:
+		upper_dev = info->upper_dev;
+		if (!info->master)
+			break;
+		if (info->linking) {
+			if (!mlxsw_sp_vport) {
+				WARN_ON(!mlxsw_sp_vport);
+				return NOTIFY_BAD;
+			}
+			err = mlxsw_sp_vport_bridge_join(mlxsw_sp_vport,
+							 upper_dev);
+			if (err) {
+				netdev_err(dev, "Failed to join bridge\n");
+				return NOTIFY_BAD;
+			}
+		} else {
+			/* We ignore bridge's unlinking notifications if vPort
+			 * is gone, since we already left the bridge when the
+			 * VLAN device was unlinked from the real device.
+			 */
+			if (!mlxsw_sp_vport)
+				return NOTIFY_DONE;
+			err = mlxsw_sp_vport_bridge_leave(mlxsw_sp_vport,
+							  upper_dev);
+			if (err) {
+				netdev_err(dev, "Failed to leave bridge\n");
+				return NOTIFY_BAD;
+			}
+		}
+	}
+
+	return NOTIFY_DONE;
+}
+
+static int mlxsw_sp_netdevice_vlan_event(struct net_device *vlan_dev,
+					 unsigned long event, void *ptr)
+{
+	struct net_device *real_dev = vlan_dev_real_dev(vlan_dev);
+	u16 vid = vlan_dev_vlan_id(vlan_dev);
+
+	if (!mlxsw_sp_port_dev_check(real_dev))
+		return NOTIFY_DONE;
+
+	return mlxsw_sp_netdevice_vport_event(real_dev, event, ptr, vid);
+}
+
 static int mlxsw_sp_netdevice_event(struct notifier_block *unused,
 				    unsigned long event, void *ptr)
 {
@@ -2442,6 +2797,9 @@ static int mlxsw_sp_netdevice_event(struct notifier_block *unused,
 	if (netif_is_lag_master(dev))
 		return mlxsw_sp_netdevice_lag_event(dev, event, ptr);
 
+	if (is_vlan_dev(dev))
+		return mlxsw_sp_netdevice_vlan_event(dev, event, ptr);
+
 	return NOTIFY_DONE;
 }