1 files changed, 99 insertions, 0 deletions
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en/tc/act/mpls.c b/drivers/net/ethernet/mellanox/mlx5/core/en/tc/act/mpls.c
new file mode 100644
index 000000000000..f106190bf37c
--- /dev/null
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en/tc/act/mpls.c
@@ -0,0 +1,99 @@
+// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
+// Copyright (c) 2021, NVIDIA CORPORATION & AFFILIATES. All rights reserved.
+
+#include <net/bareudp.h>
+#include "act.h"
+#include "en/tc_priv.h"
+
+static bool
+tc_act_can_offload_mpls_push(struct mlx5e_tc_act_parse_state *parse_state,
+			     const struct flow_action_entry *act,
+			     int act_index,
+			     struct mlx5_flow_attr *attr)
+{
+	struct netlink_ext_ack *extack = parse_state->extack;
+	struct mlx5e_priv *priv = parse_state->flow->priv;
+
+	if (!MLX5_CAP_ESW_FLOWTABLE_FDB(priv->mdev, reformat_l2_to_l3_tunnel) ||
+	    act->mpls_push.proto != htons(ETH_P_MPLS_UC)) {
+		NL_SET_ERR_MSG_MOD(extack, "mpls push is supported only for mpls_uc protocol");
+		return false;
+	}
+
+	return true;
+}
+
+static void
+copy_mpls_info(struct mlx5e_mpls_info *mpls_info,
+	       const struct flow_action_entry *act)
+{
+	mpls_info->label = act->mpls_push.label;
+	mpls_info->tc = act->mpls_push.tc;
+	mpls_info->bos = act->mpls_push.bos;
+	mpls_info->ttl = act->mpls_push.ttl;
+}
+
+static int
+tc_act_parse_mpls_push(struct mlx5e_tc_act_parse_state *parse_state,
+		       const struct flow_action_entry *act,
+		       struct mlx5e_priv *priv,
+		       struct mlx5_flow_attr *attr)
+{
+	parse_state->mpls_push = true;
+	copy_mpls_info(&parse_state->mpls_info, act);
+
+	return 0;
+}
+
+static bool
+tc_act_can_offload_mpls_pop(struct mlx5e_tc_act_parse_state *parse_state,
+			    const struct flow_action_entry *act,
+			    int act_index,
+			    struct mlx5_flow_attr *attr)
+{
+	struct netlink_ext_ack *extack = parse_state->extack;
+	struct net_device *filter_dev;
+
+	filter_dev = attr->parse_attr->filter_dev;
+
+	/* we only support mpls pop if it is the first action
+	 * or it is second action after tunnel key unset
+	 * and the filter net device is bareudp. Subsequent
+	 * actions can be pedit and the last can be mirred
+	 * egress redirect.
+	 */
+	if ((act_index == 1 && !parse_state->decap) || act_index > 1) {
+		NL_SET_ERR_MSG_MOD(extack, "mpls pop supported only as first action or with decap");
+		return false;
+	}
+
+	if (!netif_is_bareudp(filter_dev)) {
+		NL_SET_ERR_MSG_MOD(extack, "mpls pop supported only on bareudp devices");
+		return false;
+	}
+
+	return true;
+}
+
+static int
+tc_act_parse_mpls_pop(struct mlx5e_tc_act_parse_state *parse_state,
+		      const struct flow_action_entry *act,
+		      struct mlx5e_priv *priv,
+		      struct mlx5_flow_attr *attr)
+{
+	attr->esw_attr->eth.h_proto = act->mpls_pop.proto;
+	attr->action |= MLX5_FLOW_CONTEXT_ACTION_PACKET_REFORMAT;
+	flow_flag_set(parse_state->flow, L3_TO_L2_DECAP);
+
+	return 0;
+}
+
+struct mlx5e_tc_act mlx5e_tc_act_mpls_push = {
+	.can_offload = tc_act_can_offload_mpls_push,
+	.parse_action = tc_act_parse_mpls_push,
+};
+
+struct mlx5e_tc_act mlx5e_tc_act_mpls_pop = {
+	.can_offload = tc_act_can_offload_mpls_pop,
+	.parse_action = tc_act_parse_mpls_pop,
+};