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 struct mlx5_flow_attr *attr) 13 { 14 struct netlink_ext_ack *extack = parse_state->extack; 15 struct mlx5e_priv *priv = parse_state->flow->priv; 16 17 if (!MLX5_CAP_ESW_FLOWTABLE_FDB(priv->mdev, reformat_l2_to_l3_tunnel) || 18 act->mpls_push.proto != htons(ETH_P_MPLS_UC)) { 19 NL_SET_ERR_MSG_MOD(extack, "mpls push is supported only for mpls_uc protocol"); 20 return false; 21 } 22 23 return true; 24 } 25 26 static void 27 copy_mpls_info(struct mlx5e_mpls_info *mpls_info, 28 const struct flow_action_entry *act) 29 { 30 mpls_info->label = act->mpls_push.label; 31 mpls_info->tc = act->mpls_push.tc; 32 mpls_info->bos = act->mpls_push.bos; 33 mpls_info->ttl = act->mpls_push.ttl; 34 } 35 36 static int 37 tc_act_parse_mpls_push(struct mlx5e_tc_act_parse_state *parse_state, 38 const struct flow_action_entry *act, 39 struct mlx5e_priv *priv, 40 struct mlx5_flow_attr *attr) 41 { 42 parse_state->mpls_push = true; 43 copy_mpls_info(&parse_state->mpls_info, act); 44 45 return 0; 46 } 47 48 static bool 49 tc_act_can_offload_mpls_pop(struct mlx5e_tc_act_parse_state *parse_state, 50 const struct flow_action_entry *act, 51 int act_index, 52 struct mlx5_flow_attr *attr) 53 { 54 struct netlink_ext_ack *extack = parse_state->extack; 55 struct net_device *filter_dev; 56 57 filter_dev = attr->parse_attr->filter_dev; 58 59 /* we only support mpls pop if it is the first action 60 * or it is second action after tunnel key unset 61 * and the filter net device is bareudp. Subsequent 62 * actions can be pedit and the last can be mirred 63 * egress redirect. 64 */ 65 if ((act_index == 1 && !parse_state->decap) || act_index > 1) { 66 NL_SET_ERR_MSG_MOD(extack, "mpls pop supported only as first action or with decap"); 67 return false; 68 } 69 70 if (!netif_is_bareudp(filter_dev)) { 71 NL_SET_ERR_MSG_MOD(extack, "mpls pop supported only on bareudp devices"); 72 return false; 73 } 74 75 return true; 76 } 77 78 static int 79 tc_act_parse_mpls_pop(struct mlx5e_tc_act_parse_state *parse_state, 80 const struct flow_action_entry *act, 81 struct mlx5e_priv *priv, 82 struct mlx5_flow_attr *attr) 83 { 84 attr->esw_attr->eth.h_proto = act->mpls_pop.proto; 85 attr->action |= MLX5_FLOW_CONTEXT_ACTION_PACKET_REFORMAT; 86 flow_flag_set(parse_state->flow, L3_TO_L2_DECAP); 87 88 return 0; 89 } 90 91 struct mlx5e_tc_act mlx5e_tc_act_mpls_push = { 92 .can_offload = tc_act_can_offload_mpls_push, 93 .parse_action = tc_act_parse_mpls_push, 94 }; 95 96 struct mlx5e_tc_act mlx5e_tc_act_mpls_pop = { 97 .can_offload = tc_act_can_offload_mpls_pop, 98 .parse_action = tc_act_parse_mpls_pop, 99 }; 100