1 // SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB 2 // Copyright (c) 2021, NVIDIA CORPORATION & AFFILIATES. All rights reserved. 3 4 #include <linux/if_vlan.h> 5 #include "act.h" 6 #include "vlan.h" 7 #include "en/tc_priv.h" 8 9 static int 10 add_vlan_prio_tag_rewrite_action(struct mlx5e_priv *priv, 11 struct mlx5e_tc_flow_parse_attr *parse_attr, 12 u32 *action, struct netlink_ext_ack *extack) 13 { 14 const struct flow_action_entry prio_tag_act = { 15 .vlan.vid = 0, 16 .vlan.prio = 17 MLX5_GET(fte_match_set_lyr_2_4, 18 mlx5e_get_match_headers_value(*action, 19 &parse_attr->spec), 20 first_prio) & 21 MLX5_GET(fte_match_set_lyr_2_4, 22 mlx5e_get_match_headers_criteria(*action, 23 &parse_attr->spec), 24 first_prio), 25 }; 26 27 return mlx5e_tc_act_vlan_add_rewrite_action(priv, MLX5_FLOW_NAMESPACE_FDB, 28 &prio_tag_act, parse_attr, action, 29 extack); 30 } 31 32 static int 33 parse_tc_vlan_action(struct mlx5e_priv *priv, 34 const struct flow_action_entry *act, 35 struct mlx5_esw_flow_attr *attr, 36 u32 *action, 37 struct netlink_ext_ack *extack, 38 struct mlx5e_tc_act_parse_state *parse_state) 39 { 40 u8 vlan_idx = attr->total_vlan; 41 42 if (vlan_idx >= MLX5_FS_VLAN_DEPTH) { 43 NL_SET_ERR_MSG_MOD(extack, "Total vlans used is greater than supported"); 44 return -EOPNOTSUPP; 45 } 46 47 if (!mlx5_eswitch_vlan_actions_supported(priv->mdev, vlan_idx)) { 48 NL_SET_ERR_MSG_MOD(extack, "firmware vlan actions is not supported"); 49 return -EOPNOTSUPP; 50 } 51 52 switch (act->id) { 53 case FLOW_ACTION_VLAN_POP: 54 if (vlan_idx) 55 *action |= MLX5_FLOW_CONTEXT_ACTION_VLAN_POP_2; 56 else 57 *action |= MLX5_FLOW_CONTEXT_ACTION_VLAN_POP; 58 break; 59 case FLOW_ACTION_VLAN_PUSH: 60 attr->vlan_vid[vlan_idx] = act->vlan.vid; 61 attr->vlan_prio[vlan_idx] = act->vlan.prio; 62 attr->vlan_proto[vlan_idx] = act->vlan.proto; 63 if (!attr->vlan_proto[vlan_idx]) 64 attr->vlan_proto[vlan_idx] = htons(ETH_P_8021Q); 65 66 if (vlan_idx) 67 *action |= MLX5_FLOW_CONTEXT_ACTION_VLAN_PUSH_2; 68 else 69 *action |= MLX5_FLOW_CONTEXT_ACTION_VLAN_PUSH; 70 break; 71 case FLOW_ACTION_VLAN_POP_ETH: 72 parse_state->eth_pop = true; 73 break; 74 case FLOW_ACTION_VLAN_PUSH_ETH: 75 if (!flow_flag_test(parse_state->flow, L3_TO_L2_DECAP)) 76 return -EOPNOTSUPP; 77 parse_state->eth_push = true; 78 memcpy(attr->eth.h_dest, act->vlan_push_eth.dst, ETH_ALEN); 79 memcpy(attr->eth.h_source, act->vlan_push_eth.src, ETH_ALEN); 80 break; 81 default: 82 NL_SET_ERR_MSG_MOD(extack, "Unexpected action id for VLAN"); 83 return -EINVAL; 84 } 85 86 attr->total_vlan = vlan_idx + 1; 87 88 return 0; 89 } 90 91 int 92 mlx5e_tc_act_vlan_add_push_action(struct mlx5e_priv *priv, 93 struct mlx5_flow_attr *attr, 94 struct net_device **out_dev, 95 struct netlink_ext_ack *extack) 96 { 97 struct net_device *vlan_dev = *out_dev; 98 struct flow_action_entry vlan_act = { 99 .id = FLOW_ACTION_VLAN_PUSH, 100 .vlan.vid = vlan_dev_vlan_id(vlan_dev), 101 .vlan.proto = vlan_dev_vlan_proto(vlan_dev), 102 .vlan.prio = 0, 103 }; 104 int err; 105 106 err = parse_tc_vlan_action(priv, &vlan_act, attr->esw_attr, &attr->action, extack, NULL); 107 if (err) 108 return err; 109 110 rcu_read_lock(); 111 *out_dev = dev_get_by_index_rcu(dev_net(vlan_dev), dev_get_iflink(vlan_dev)); 112 rcu_read_unlock(); 113 if (!*out_dev) 114 return -ENODEV; 115 116 if (is_vlan_dev(*out_dev)) 117 err = mlx5e_tc_act_vlan_add_push_action(priv, attr, out_dev, extack); 118 119 return err; 120 } 121 122 int 123 mlx5e_tc_act_vlan_add_pop_action(struct mlx5e_priv *priv, 124 struct mlx5_flow_attr *attr, 125 struct netlink_ext_ack *extack) 126 { 127 struct flow_action_entry vlan_act = { 128 .id = FLOW_ACTION_VLAN_POP, 129 }; 130 int nest_level, err = 0; 131 132 nest_level = attr->parse_attr->filter_dev->lower_level - 133 priv->netdev->lower_level; 134 while (nest_level--) { 135 err = parse_tc_vlan_action(priv, &vlan_act, attr->esw_attr, &attr->action, 136 extack, NULL); 137 if (err) 138 return err; 139 } 140 141 return err; 142 } 143 144 static int 145 tc_act_parse_vlan(struct mlx5e_tc_act_parse_state *parse_state, 146 const struct flow_action_entry *act, 147 struct mlx5e_priv *priv, 148 struct mlx5_flow_attr *attr) 149 { 150 struct mlx5_esw_flow_attr *esw_attr = attr->esw_attr; 151 int err; 152 153 if (act->id == FLOW_ACTION_VLAN_PUSH && 154 (attr->action & MLX5_FLOW_CONTEXT_ACTION_VLAN_POP)) { 155 /* Replace vlan pop+push with vlan modify */ 156 attr->action &= ~MLX5_FLOW_CONTEXT_ACTION_VLAN_POP; 157 err = mlx5e_tc_act_vlan_add_rewrite_action(priv, MLX5_FLOW_NAMESPACE_FDB, act, 158 attr->parse_attr, &attr->action, 159 parse_state->extack); 160 } else { 161 err = parse_tc_vlan_action(priv, act, esw_attr, &attr->action, 162 parse_state->extack, parse_state); 163 } 164 165 if (err) 166 return err; 167 168 esw_attr->split_count = esw_attr->out_count; 169 parse_state->if_count = 0; 170 171 return 0; 172 } 173 174 static int 175 tc_act_post_parse_vlan(struct mlx5e_tc_act_parse_state *parse_state, 176 struct mlx5e_priv *priv, 177 struct mlx5_flow_attr *attr) 178 { 179 struct mlx5e_tc_flow_parse_attr *parse_attr = attr->parse_attr; 180 struct netlink_ext_ack *extack = parse_state->extack; 181 struct mlx5_eswitch *esw = priv->mdev->priv.eswitch; 182 int err; 183 184 if (MLX5_CAP_GEN(esw->dev, prio_tag_required) && 185 attr->action & MLX5_FLOW_CONTEXT_ACTION_VLAN_POP) { 186 /* For prio tag mode, replace vlan pop with rewrite vlan prio 187 * tag rewrite. 188 */ 189 attr->action &= ~MLX5_FLOW_CONTEXT_ACTION_VLAN_POP; 190 err = add_vlan_prio_tag_rewrite_action(priv, parse_attr, 191 &attr->action, extack); 192 if (err) 193 return err; 194 } 195 196 return 0; 197 } 198 199 struct mlx5e_tc_act mlx5e_tc_act_vlan = { 200 .parse_action = tc_act_parse_vlan, 201 .post_parse = tc_act_post_parse_vlan, 202 }; 203