1 // SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB 2 // Copyright (c) 2021, NVIDIA CORPORATION & AFFILIATES. All rights reserved. 3 4 #include <net/bareudp.h> 5 #include "act.h" 6 #include "en/tc_priv.h" 7 8 static bool 9 tc_act_can_offload_mpls_push(struct mlx5e_tc_act_parse_state *parse_state, 10 const struct flow_action_entry *act, 11 int act_index) 12 { 13 struct netlink_ext_ack *extack = parse_state->extack; 14 struct mlx5e_priv *priv = parse_state->flow->priv; 15 16 if (!MLX5_CAP_ESW_FLOWTABLE_FDB(priv->mdev, reformat_l2_to_l3_tunnel) || 17 act->mpls_push.proto != htons(ETH_P_MPLS_UC)) { 18 NL_SET_ERR_MSG_MOD(extack, "mpls push is supported only for mpls_uc protocol"); 19 return false; 20 } 21 22 return true; 23 } 24 25 static int 26 tc_act_parse_mpls_push(struct mlx5e_tc_act_parse_state *parse_state, 27 const struct flow_action_entry *act, 28 struct mlx5e_priv *priv, 29 struct mlx5_flow_attr *attr) 30 { 31 parse_state->mpls_push = true; 32 33 return 0; 34 } 35 36 static bool 37 tc_act_can_offload_mpls_pop(struct mlx5e_tc_act_parse_state *parse_state, 38 const struct flow_action_entry *act, 39 int act_index) 40 { 41 struct netlink_ext_ack *extack = parse_state->extack; 42 struct mlx5e_tc_flow *flow = parse_state->flow; 43 struct net_device *filter_dev; 44 45 filter_dev = flow->attr->parse_attr->filter_dev; 46 47 /* we only support mpls pop if it is the first action 48 * and the filter net device is bareudp. Subsequent 49 * actions can be pedit and the last can be mirred 50 * egress redirect. 51 */ 52 if (act_index) { 53 NL_SET_ERR_MSG_MOD(extack, "mpls pop supported only as first action"); 54 return false; 55 } 56 57 if (!netif_is_bareudp(filter_dev)) { 58 NL_SET_ERR_MSG_MOD(extack, "mpls pop supported only on bareudp devices"); 59 return false; 60 } 61 62 return true; 63 } 64 65 static int 66 tc_act_parse_mpls_pop(struct mlx5e_tc_act_parse_state *parse_state, 67 const struct flow_action_entry *act, 68 struct mlx5e_priv *priv, 69 struct mlx5_flow_attr *attr) 70 { 71 attr->parse_attr->eth.h_proto = act->mpls_pop.proto; 72 attr->action |= MLX5_FLOW_CONTEXT_ACTION_PACKET_REFORMAT; 73 flow_flag_set(parse_state->flow, L3_TO_L2_DECAP); 74 75 return 0; 76 } 77 78 struct mlx5e_tc_act mlx5e_tc_act_mpls_push = { 79 .can_offload = tc_act_can_offload_mpls_push, 80 .parse_action = tc_act_parse_mpls_push, 81 }; 82 83 struct mlx5e_tc_act mlx5e_tc_act_mpls_pop = { 84 .can_offload = tc_act_can_offload_mpls_pop, 85 .parse_action = tc_act_parse_mpls_pop, 86 }; 87