net/mlx5: E-switch, Initialize TSAR Qos hardware block before its user vports

First enable TSAR Qos hardware block in device before enabling its
user vports.

This refactor is needed so that vports can be enabled before their
representor netdevice can be created.

While at it, esw_create_tsar() returns error code which was used only to
print error. However esw_create_tsar() already prints warning if it hits
an error.
Hence, remove the redundant warning.
Signed-off-by: Parav Pandit <parav@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>

drivers/net/ethernet/mellanox/mlx5/core/eswitch.c

@@ -1415,7 +1415,7 @@ static bool element_type_supported(struct mlx5_eswitch *esw, int type)
 }
 
 /* Vport QoS management */
-static int esw_create_tsar(struct mlx5_eswitch *esw)
+static void esw_create_tsar(struct mlx5_eswitch *esw)
 {
 	u32 tsar_ctx[MLX5_ST_SZ_DW(scheduling_context)] = {0};
 	struct mlx5_core_dev *dev = esw->dev;
@@ -1423,13 +1423,13 @@ static int esw_create_tsar(struct mlx5_eswitch *esw)
 	int err;
 
 	if (!MLX5_CAP_GEN(dev, qos) || !MLX5_CAP_QOS(dev, esw_scheduling))
-		return 0;
+		return;
 
 	if (!element_type_supported(esw, SCHEDULING_CONTEXT_ELEMENT_TYPE_TSAR))
-		return 0;
+		return;
 
 	if (esw->qos.enabled)
-		return -EEXIST;
+		return;
 
 	MLX5_SET(scheduling_context, tsar_ctx, element_type,
 		 SCHEDULING_CONTEXT_ELEMENT_TYPE_TSAR);
@@ -1443,11 +1443,10 @@ static int esw_create_tsar(struct mlx5_eswitch *esw)
 						 &esw->qos.root_tsar_id);
 	if (err) {
 		esw_warn(esw->dev, "E-Switch create TSAR failed (%d)\n", err);
-		return err;
+		return;
 	}
 
 	esw->qos.enabled = true;
-	return 0;
 }
 
 static void esw_destroy_tsar(struct mlx5_eswitch *esw)
@@ -1819,6 +1818,8 @@ int mlx5_eswitch_enable(struct mlx5_eswitch *esw, int mode)
 	if (!MLX5_CAP_ESW_EGRESS_ACL(esw->dev, ft_support))
 		esw_warn(esw->dev, "engress ACL is not supported by FW\n");
 
+	esw_create_tsar(esw);
+
 	esw->mode = mode;
 
 	mlx5_lag_update(esw->dev);
@@ -1836,10 +1837,6 @@ int mlx5_eswitch_enable(struct mlx5_eswitch *esw, int mode)
 	if (err)
 		goto abort;
 
-	err = esw_create_tsar(esw);
-	if (err)
-		esw_warn(esw->dev, "Failed to create eswitch TSAR");
-
 	enabled_events = (mode == MLX5_ESWITCH_LEGACY) ? SRIOV_VPORT_EVENTS :
 		UC_ADDR_CHANGE;
 
@@ -1899,13 +1896,13 @@ void mlx5_eswitch_disable(struct mlx5_eswitch *esw)
 	if (mc_promisc && mc_promisc->uplink_rule)
 		mlx5_del_flow_rules(mc_promisc->uplink_rule);
 
-	esw_destroy_tsar(esw);
-
 	if (esw->mode == MLX5_ESWITCH_LEGACY)
 		esw_destroy_legacy_table(esw);
 	else if (esw->mode == MLX5_ESWITCH_OFFLOADS)
 		esw_offloads_cleanup(esw);
 
+	esw_destroy_tsar(esw);
+
 	old_mode = esw->mode;
 	esw->mode = MLX5_ESWITCH_NONE;