1 files changed, 71 insertions, 0 deletions
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en/tc/act/sample.c b/drivers/net/ethernet/mellanox/mlx5/core/en/tc/act/sample.c
new file mode 100644
index 000000000..2c0196431
--- /dev/null
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en/tc/act/sample.c
@@ -0,0 +1,71 @@
+// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
+// Copyright (c) 2021, NVIDIA CORPORATION & AFFILIATES. All rights reserved.
+
+#include <net/psample.h>
+#include "act.h"
+#include "en/tc_priv.h"
+#include "en/tc/act/sample.h"
+
+static bool
+tc_act_can_offload_sample(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;
+	bool ct_nat;
+
+	ct_nat = attr->ct_attr.ct_action & TCA_CT_ACT_NAT;
+
+	if (flow_flag_test(parse_state->flow, CT) && ct_nat) {
+		NL_SET_ERR_MSG_MOD(extack, "Sample action with CT NAT is not supported");
+		return false;
+	}
+
+	return true;
+}
+
+static int
+tc_act_parse_sample(struct mlx5e_tc_act_parse_state *parse_state,
+		    const struct flow_action_entry *act,
+		    struct mlx5e_priv *priv,
+		    struct mlx5_flow_attr *attr)
+{
+	struct mlx5e_sample_attr *sample_attr = &attr->sample_attr;
+
+	sample_attr->rate = act->sample.rate;
+	sample_attr->group_num = act->sample.psample_group->group_num;
+
+	if (act->sample.truncate)
+		sample_attr->trunc_size = act->sample.trunc_size;
+
+	attr->flags |= MLX5_ATTR_FLAG_SAMPLE;
+	flow_flag_set(parse_state->flow, SAMPLE);
+
+	return 0;
+}
+
+bool
+mlx5e_tc_act_sample_is_multi_table(struct mlx5_core_dev *mdev,
+				   struct mlx5_flow_attr *attr)
+{
+	if (MLX5_CAP_GEN(mdev, reg_c_preserve) ||
+	    attr->action & MLX5_FLOW_CONTEXT_ACTION_DECAP)
+		return true;
+
+	return false;
+}
+
+static bool
+tc_act_is_multi_table_act_sample(struct mlx5e_priv *priv,
+				 const struct flow_action_entry *act,
+				 struct mlx5_flow_attr *attr)
+{
+	return mlx5e_tc_act_sample_is_multi_table(priv->mdev, attr);
+}
+
+struct mlx5e_tc_act mlx5e_tc_act_sample = {
+	.can_offload = tc_act_can_offload_sample,
+	.parse_action = tc_act_parse_sample,
+	.is_multi_table_act = tc_act_is_multi_table_act_sample,
+};