1 // SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB 2 // Copyright (c) 2021, NVIDIA CORPORATION & AFFILIATES. All rights reserved. 3 4 #include <net/psample.h> 5 #include "act.h" 6 #include "en/tc_priv.h" 7 #include "en/tc/act/sample.h" 8 9 static bool 10 tc_act_can_offload_sample(struct mlx5e_tc_act_parse_state *parse_state, 11 const struct flow_action_entry *act, 12 int act_index, 13 struct mlx5_flow_attr *attr) 14 { 15 struct netlink_ext_ack *extack = parse_state->extack; 16 bool ct_nat; 17 18 ct_nat = attr->ct_attr.ct_action & TCA_CT_ACT_NAT; 19 20 if (flow_flag_test(parse_state->flow, CT) && ct_nat) { 21 NL_SET_ERR_MSG_MOD(extack, "Sample action with CT NAT is not supported"); 22 return false; 23 } 24 25 return true; 26 } 27 28 static int 29 tc_act_parse_sample(struct mlx5e_tc_act_parse_state *parse_state, 30 const struct flow_action_entry *act, 31 struct mlx5e_priv *priv, 32 struct mlx5_flow_attr *attr) 33 { 34 struct mlx5e_sample_attr *sample_attr = &attr->sample_attr; 35 36 sample_attr->rate = act->sample.rate; 37 sample_attr->group_num = act->sample.psample_group->group_num; 38 39 if (act->sample.truncate) 40 sample_attr->trunc_size = act->sample.trunc_size; 41 42 attr->flags |= MLX5_ATTR_FLAG_SAMPLE; 43 flow_flag_set(parse_state->flow, SAMPLE); 44 45 return 0; 46 } 47 48 bool 49 mlx5e_tc_act_sample_is_multi_table(struct mlx5_core_dev *mdev, 50 struct mlx5_flow_attr *attr) 51 { 52 if (MLX5_CAP_GEN(mdev, reg_c_preserve) || 53 attr->action & MLX5_FLOW_CONTEXT_ACTION_DECAP) 54 return true; 55 56 return false; 57 } 58 59 static bool 60 tc_act_is_multi_table_act_sample(struct mlx5e_priv *priv, 61 const struct flow_action_entry *act, 62 struct mlx5_flow_attr *attr) 63 { 64 return mlx5e_tc_act_sample_is_multi_table(priv->mdev, attr); 65 } 66 67 struct mlx5e_tc_act mlx5e_tc_act_sample = { 68 .can_offload = tc_act_can_offload_sample, 69 .parse_action = tc_act_parse_sample, 70 .is_multi_table_act = tc_act_is_multi_table_act_sample, 71 }; 72