1 /* 2 * Copyright (c) 2015, Mellanox Technologies. All rights reserved. 3 * 4 * This software is available to you under a choice of one of two 5 * licenses. You may choose to be licensed under the terms of the GNU 6 * General Public License (GPL) Version 2, available from the file 7 * COPYING in the main directory of this source tree, or the 8 * OpenIB.org BSD license below: 9 * 10 * Redistribution and use in source and binary forms, with or 11 * without modification, are permitted provided that the following 12 * conditions are met: 13 * 14 * - Redistributions of source code must retain the above 15 * copyright notice, this list of conditions and the following 16 * disclaimer. 17 * 18 * - Redistributions in binary form must reproduce the above 19 * copyright notice, this list of conditions and the following 20 * disclaimer in the documentation and/or other materials 21 * provided with the distribution. 22 * 23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 30 * SOFTWARE. 31 */ 32 33 #ifndef _MLX5_FS_CORE_ 34 #define _MLX5_FS_CORE_ 35 36 #include <linux/refcount.h> 37 #include <linux/mlx5/fs.h> 38 #include <linux/rhashtable.h> 39 #include <linux/llist.h> 40 #include <steering/fs_dr.h> 41 42 #define FDB_TC_MAX_CHAIN 3 43 #define FDB_FT_CHAIN (FDB_TC_MAX_CHAIN + 1) 44 #define FDB_TC_SLOW_PATH_CHAIN (FDB_FT_CHAIN + 1) 45 46 /* The index of the last real chain (FT) + 1 as chain zero is valid as well */ 47 #define FDB_NUM_CHAINS (FDB_FT_CHAIN + 1) 48 49 #define FDB_TC_MAX_PRIO 16 50 #define FDB_TC_LEVELS_PER_PRIO 2 51 52 struct mlx5_modify_hdr { 53 enum mlx5_flow_namespace_type ns_type; 54 union { 55 struct mlx5_fs_dr_action action; 56 u32 id; 57 }; 58 }; 59 60 struct mlx5_pkt_reformat { 61 enum mlx5_flow_namespace_type ns_type; 62 int reformat_type; /* from mlx5_ifc */ 63 union { 64 struct mlx5_fs_dr_action action; 65 u32 id; 66 }; 67 }; 68 69 /* FS_TYPE_PRIO_CHAINS is a PRIO that will have namespaces only, 70 * and those are in parallel to one another when going over them to connect 71 * a new flow table. Meaning the last flow table in a TYPE_PRIO prio in one 72 * parallel namespace will not automatically connect to the first flow table 73 * found in any prio in any next namespace, but skip the entire containing 74 * TYPE_PRIO_CHAINS prio. 75 * 76 * This is used to implement tc chains, each chain of prios is a different 77 * namespace inside a containing TYPE_PRIO_CHAINS prio. 78 */ 79 80 enum fs_node_type { 81 FS_TYPE_NAMESPACE, 82 FS_TYPE_PRIO, 83 FS_TYPE_PRIO_CHAINS, 84 FS_TYPE_FLOW_TABLE, 85 FS_TYPE_FLOW_GROUP, 86 FS_TYPE_FLOW_ENTRY, 87 FS_TYPE_FLOW_DEST 88 }; 89 90 enum fs_flow_table_type { 91 FS_FT_NIC_RX = 0x0, 92 FS_FT_NIC_TX = 0x1, 93 FS_FT_ESW_EGRESS_ACL = 0x2, 94 FS_FT_ESW_INGRESS_ACL = 0x3, 95 FS_FT_FDB = 0X4, 96 FS_FT_SNIFFER_RX = 0X5, 97 FS_FT_SNIFFER_TX = 0X6, 98 FS_FT_RDMA_RX = 0X7, 99 FS_FT_RDMA_TX = 0X8, 100 FS_FT_MAX_TYPE = FS_FT_RDMA_TX, 101 }; 102 103 enum fs_flow_table_op_mod { 104 FS_FT_OP_MOD_NORMAL, 105 FS_FT_OP_MOD_LAG_DEMUX, 106 }; 107 108 enum fs_fte_status { 109 FS_FTE_STATUS_EXISTING = 1UL << 0, 110 }; 111 112 enum mlx5_flow_steering_mode { 113 MLX5_FLOW_STEERING_MODE_DMFS, 114 MLX5_FLOW_STEERING_MODE_SMFS 115 }; 116 117 struct mlx5_flow_steering { 118 struct mlx5_core_dev *dev; 119 enum mlx5_flow_steering_mode mode; 120 struct kmem_cache *fgs_cache; 121 struct kmem_cache *ftes_cache; 122 struct mlx5_flow_root_namespace *root_ns; 123 struct mlx5_flow_root_namespace *fdb_root_ns; 124 struct mlx5_flow_namespace **fdb_sub_ns; 125 struct mlx5_flow_root_namespace **esw_egress_root_ns; 126 struct mlx5_flow_root_namespace **esw_ingress_root_ns; 127 struct mlx5_flow_root_namespace *sniffer_tx_root_ns; 128 struct mlx5_flow_root_namespace *sniffer_rx_root_ns; 129 struct mlx5_flow_root_namespace *rdma_rx_root_ns; 130 struct mlx5_flow_root_namespace *rdma_tx_root_ns; 131 struct mlx5_flow_root_namespace *egress_root_ns; 132 }; 133 134 struct fs_node { 135 struct list_head list; 136 struct list_head children; 137 enum fs_node_type type; 138 struct fs_node *parent; 139 struct fs_node *root; 140 /* lock the node for writing and traversing */ 141 struct rw_semaphore lock; 142 refcount_t refcount; 143 bool active; 144 void (*del_hw_func)(struct fs_node *); 145 void (*del_sw_func)(struct fs_node *); 146 atomic_t version; 147 }; 148 149 struct mlx5_flow_rule { 150 struct fs_node node; 151 struct mlx5_flow_table *ft; 152 struct mlx5_flow_destination dest_attr; 153 /* next_ft should be accessed under chain_lock and only of 154 * destination type is FWD_NEXT_fT. 155 */ 156 struct list_head next_ft; 157 u32 sw_action; 158 }; 159 160 struct mlx5_flow_handle { 161 int num_rules; 162 struct mlx5_flow_rule *rule[]; 163 }; 164 165 /* Type of children is mlx5_flow_group */ 166 struct mlx5_flow_table { 167 struct fs_node node; 168 struct mlx5_fs_dr_table fs_dr_table; 169 u32 id; 170 u16 vport; 171 unsigned int max_fte; 172 unsigned int level; 173 enum fs_flow_table_type type; 174 enum fs_flow_table_op_mod op_mod; 175 struct { 176 bool active; 177 unsigned int required_groups; 178 unsigned int group_size; 179 unsigned int num_groups; 180 unsigned int max_fte; 181 } autogroup; 182 /* Protect fwd_rules */ 183 struct mutex lock; 184 /* FWD rules that point on this flow table */ 185 struct list_head fwd_rules; 186 u32 flags; 187 struct rhltable fgs_hash; 188 enum mlx5_flow_table_miss_action def_miss_action; 189 struct mlx5_flow_namespace *ns; 190 }; 191 192 struct mlx5_ft_underlay_qp { 193 struct list_head list; 194 u32 qpn; 195 }; 196 197 #define MLX5_FTE_MATCH_PARAM_RESERVED reserved_at_a00 198 /* Calculate the fte_match_param length and without the reserved length. 199 * Make sure the reserved field is the last. 200 */ 201 #define MLX5_ST_SZ_DW_MATCH_PARAM \ 202 ((MLX5_BYTE_OFF(fte_match_param, MLX5_FTE_MATCH_PARAM_RESERVED) / sizeof(u32)) + \ 203 BUILD_BUG_ON_ZERO(MLX5_ST_SZ_BYTES(fte_match_param) != \ 204 MLX5_FLD_SZ_BYTES(fte_match_param, \ 205 MLX5_FTE_MATCH_PARAM_RESERVED) +\ 206 MLX5_BYTE_OFF(fte_match_param, \ 207 MLX5_FTE_MATCH_PARAM_RESERVED))) 208 209 /* Type of children is mlx5_flow_rule */ 210 struct fs_fte { 211 struct fs_node node; 212 struct mlx5_fs_dr_rule fs_dr_rule; 213 u32 val[MLX5_ST_SZ_DW_MATCH_PARAM]; 214 u32 dests_size; 215 u32 index; 216 struct mlx5_flow_context flow_context; 217 struct mlx5_flow_act action; 218 enum fs_fte_status status; 219 struct mlx5_fc *counter; 220 struct rhash_head hash; 221 int modify_mask; 222 }; 223 224 /* Type of children is mlx5_flow_table/namespace */ 225 struct fs_prio { 226 struct fs_node node; 227 unsigned int num_levels; 228 unsigned int start_level; 229 unsigned int prio; 230 unsigned int num_ft; 231 }; 232 233 /* Type of children is fs_prio */ 234 struct mlx5_flow_namespace { 235 /* parent == NULL => root ns */ 236 struct fs_node node; 237 enum mlx5_flow_table_miss_action def_miss_action; 238 }; 239 240 struct mlx5_flow_group_mask { 241 u8 match_criteria_enable; 242 u32 match_criteria[MLX5_ST_SZ_DW_MATCH_PARAM]; 243 }; 244 245 /* Type of children is fs_fte */ 246 struct mlx5_flow_group { 247 struct fs_node node; 248 struct mlx5_fs_dr_matcher fs_dr_matcher; 249 struct mlx5_flow_group_mask mask; 250 u32 start_index; 251 u32 max_ftes; 252 struct ida fte_allocator; 253 u32 id; 254 struct rhashtable ftes_hash; 255 struct rhlist_head hash; 256 }; 257 258 struct mlx5_flow_root_namespace { 259 struct mlx5_flow_namespace ns; 260 enum mlx5_flow_steering_mode mode; 261 struct mlx5_fs_dr_domain fs_dr_domain; 262 enum fs_flow_table_type table_type; 263 struct mlx5_core_dev *dev; 264 struct mlx5_flow_table *root_ft; 265 /* Should be held when chaining flow tables */ 266 struct mutex chain_lock; 267 struct list_head underlay_qpns; 268 const struct mlx5_flow_cmds *cmds; 269 }; 270 271 int mlx5_init_fc_stats(struct mlx5_core_dev *dev); 272 void mlx5_cleanup_fc_stats(struct mlx5_core_dev *dev); 273 void mlx5_fc_queue_stats_work(struct mlx5_core_dev *dev, 274 struct delayed_work *dwork, 275 unsigned long delay); 276 void mlx5_fc_update_sampling_interval(struct mlx5_core_dev *dev, 277 unsigned long interval); 278 279 const struct mlx5_flow_cmds *mlx5_fs_cmd_get_fw_cmds(void); 280 281 int mlx5_flow_namespace_set_peer(struct mlx5_flow_root_namespace *ns, 282 struct mlx5_flow_root_namespace *peer_ns); 283 284 int mlx5_flow_namespace_set_mode(struct mlx5_flow_namespace *ns, 285 enum mlx5_flow_steering_mode mode); 286 287 int mlx5_init_fs(struct mlx5_core_dev *dev); 288 void mlx5_cleanup_fs(struct mlx5_core_dev *dev); 289 290 #define fs_get_obj(v, _node) {v = container_of((_node), typeof(*v), node); } 291 292 #define fs_list_for_each_entry(pos, root) \ 293 list_for_each_entry(pos, root, node.list) 294 295 #define fs_list_for_each_entry_safe(pos, tmp, root) \ 296 list_for_each_entry_safe(pos, tmp, root, node.list) 297 298 #define fs_for_each_ns_or_ft_reverse(pos, prio) \ 299 list_for_each_entry_reverse(pos, &(prio)->node.children, list) 300 301 #define fs_for_each_ns_or_ft(pos, prio) \ 302 list_for_each_entry(pos, (&(prio)->node.children), list) 303 304 #define fs_for_each_prio(pos, ns) \ 305 fs_list_for_each_entry(pos, &(ns)->node.children) 306 307 #define fs_for_each_ns(pos, prio) \ 308 fs_list_for_each_entry(pos, &(prio)->node.children) 309 310 #define fs_for_each_ft(pos, prio) \ 311 fs_list_for_each_entry(pos, &(prio)->node.children) 312 313 #define fs_for_each_ft_safe(pos, tmp, prio) \ 314 fs_list_for_each_entry_safe(pos, tmp, &(prio)->node.children) 315 316 #define fs_for_each_fg(pos, ft) \ 317 fs_list_for_each_entry(pos, &(ft)->node.children) 318 319 #define fs_for_each_fte(pos, fg) \ 320 fs_list_for_each_entry(pos, &(fg)->node.children) 321 322 #define fs_for_each_dst(pos, fte) \ 323 fs_list_for_each_entry(pos, &(fte)->node.children) 324 325 #define MLX5_CAP_FLOWTABLE_TYPE(mdev, cap, type) ( \ 326 (type == FS_FT_NIC_RX) ? MLX5_CAP_FLOWTABLE_NIC_RX(mdev, cap) : \ 327 (type == FS_FT_ESW_EGRESS_ACL) ? MLX5_CAP_ESW_EGRESS_ACL(mdev, cap) : \ 328 (type == FS_FT_ESW_INGRESS_ACL) ? MLX5_CAP_ESW_INGRESS_ACL(mdev, cap) : \ 329 (type == FS_FT_FDB) ? MLX5_CAP_ESW_FLOWTABLE_FDB(mdev, cap) : \ 330 (type == FS_FT_SNIFFER_RX) ? MLX5_CAP_FLOWTABLE_SNIFFER_RX(mdev, cap) : \ 331 (type == FS_FT_SNIFFER_TX) ? MLX5_CAP_FLOWTABLE_SNIFFER_TX(mdev, cap) : \ 332 (type == FS_FT_RDMA_RX) ? MLX5_CAP_FLOWTABLE_RDMA_RX(mdev, cap) : \ 333 (type == FS_FT_RDMA_TX) ? MLX5_CAP_FLOWTABLE_RDMA_TX(mdev, cap) : \ 334 (BUILD_BUG_ON_ZERO(FS_FT_RDMA_TX != FS_FT_MAX_TYPE))\ 335 ) 336 337 #endif 338