1 /* SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) */ 2 /* Copyright (C) 2017-2018 Netronome Systems, Inc. */ 3 4 #ifndef __NFP_FLOWER_H__ 5 #define __NFP_FLOWER_H__ 1 6 7 #include "cmsg.h" 8 #include "../nfp_net.h" 9 10 #include <linux/circ_buf.h> 11 #include <linux/hashtable.h> 12 #include <linux/rhashtable.h> 13 #include <linux/time64.h> 14 #include <linux/types.h> 15 #include <net/pkt_cls.h> 16 #include <net/tcp.h> 17 #include <linux/workqueue.h> 18 #include <linux/idr.h> 19 20 struct nfp_fl_pre_lag; 21 struct net_device; 22 struct nfp_app; 23 24 #define NFP_FL_STAT_ID_MU_NUM GENMASK(31, 22) 25 #define NFP_FL_STAT_ID_STAT GENMASK(21, 0) 26 27 #define NFP_FL_STATS_ELEM_RS sizeof_field(struct nfp_fl_stats_id, \ 28 init_unalloc) 29 #define NFP_FLOWER_MASK_ENTRY_RS 256 30 #define NFP_FLOWER_MASK_ELEMENT_RS 1 31 #define NFP_FLOWER_MASK_HASH_BITS 10 32 33 #define NFP_FLOWER_KEY_MAX_LW 32 34 35 #define NFP_FL_META_FLAG_MANAGE_MASK BIT(7) 36 37 #define NFP_FL_MASK_REUSE_TIME_NS 40000 38 #define NFP_FL_MASK_ID_LOCATION 1 39 40 /* Extra features bitmap. */ 41 #define NFP_FL_FEATS_GENEVE BIT(0) 42 #define NFP_FL_NBI_MTU_SETTING BIT(1) 43 #define NFP_FL_FEATS_GENEVE_OPT BIT(2) 44 #define NFP_FL_FEATS_VLAN_PCP BIT(3) 45 #define NFP_FL_FEATS_VF_RLIM BIT(4) 46 #define NFP_FL_FEATS_FLOW_MOD BIT(5) 47 #define NFP_FL_FEATS_PRE_TUN_RULES BIT(6) 48 #define NFP_FL_FEATS_IPV6_TUN BIT(7) 49 #define NFP_FL_FEATS_VLAN_QINQ BIT(8) 50 #define NFP_FL_FEATS_HOST_ACK BIT(31) 51 52 #define NFP_FL_ENABLE_FLOW_MERGE BIT(0) 53 #define NFP_FL_ENABLE_LAG BIT(1) 54 55 #define NFP_FL_FEATS_HOST \ 56 (NFP_FL_FEATS_GENEVE | \ 57 NFP_FL_NBI_MTU_SETTING | \ 58 NFP_FL_FEATS_GENEVE_OPT | \ 59 NFP_FL_FEATS_VLAN_PCP | \ 60 NFP_FL_FEATS_VF_RLIM | \ 61 NFP_FL_FEATS_FLOW_MOD | \ 62 NFP_FL_FEATS_PRE_TUN_RULES | \ 63 NFP_FL_FEATS_IPV6_TUN | \ 64 NFP_FL_FEATS_VLAN_QINQ) 65 66 struct nfp_fl_mask_id { 67 struct circ_buf mask_id_free_list; 68 ktime_t *last_used; 69 u8 init_unallocated; 70 }; 71 72 struct nfp_fl_stats_id { 73 struct circ_buf free_list; 74 u32 init_unalloc; 75 u8 repeated_em_count; 76 }; 77 78 /** 79 * struct nfp_fl_tunnel_offloads - priv data for tunnel offloads 80 * @offloaded_macs: Hashtable of the offloaded MAC addresses 81 * @ipv4_off_list: List of IPv4 addresses to offload 82 * @ipv6_off_list: List of IPv6 addresses to offload 83 * @neigh_off_list_v4: List of IPv4 neighbour offloads 84 * @neigh_off_list_v6: List of IPv6 neighbour offloads 85 * @ipv4_off_lock: Lock for the IPv4 address list 86 * @ipv6_off_lock: Lock for the IPv6 address list 87 * @neigh_off_lock_v4: Lock for the IPv4 neighbour address list 88 * @neigh_off_lock_v6: Lock for the IPv6 neighbour address list 89 * @mac_off_ids: IDA to manage id assignment for offloaded MACs 90 * @neigh_nb: Notifier to monitor neighbour state 91 */ 92 struct nfp_fl_tunnel_offloads { 93 struct rhashtable offloaded_macs; 94 struct list_head ipv4_off_list; 95 struct list_head ipv6_off_list; 96 struct list_head neigh_off_list_v4; 97 struct list_head neigh_off_list_v6; 98 struct mutex ipv4_off_lock; 99 struct mutex ipv6_off_lock; 100 spinlock_t neigh_off_lock_v4; 101 spinlock_t neigh_off_lock_v6; 102 struct ida mac_off_ids; 103 struct notifier_block neigh_nb; 104 }; 105 106 /** 107 * struct nfp_mtu_conf - manage MTU setting 108 * @portnum: NFP port number of repr with requested MTU change 109 * @requested_val: MTU value requested for repr 110 * @ack: Received ack that MTU has been correctly set 111 * @wait_q: Wait queue for MTU acknowledgements 112 * @lock: Lock for setting/reading MTU variables 113 */ 114 struct nfp_mtu_conf { 115 u32 portnum; 116 unsigned int requested_val; 117 bool ack; 118 wait_queue_head_t wait_q; 119 spinlock_t lock; 120 }; 121 122 /** 123 * struct nfp_fl_lag - Flower APP priv data for link aggregation 124 * @work: Work queue for writing configs to the HW 125 * @lock: Lock to protect lag_group_list 126 * @group_list: List of all master/slave groups offloaded 127 * @ida_handle: IDA to handle group ids 128 * @pkt_num: Incremented for each config packet sent 129 * @batch_ver: Incremented for each batch of config packets 130 * @global_inst: Instance allocator for groups 131 * @rst_cfg: Marker to reset HW LAG config 132 * @retrans_skbs: Cmsgs that could not be processed by HW and require 133 * retransmission 134 */ 135 struct nfp_fl_lag { 136 struct delayed_work work; 137 struct mutex lock; 138 struct list_head group_list; 139 struct ida ida_handle; 140 unsigned int pkt_num; 141 unsigned int batch_ver; 142 u8 global_inst; 143 bool rst_cfg; 144 struct sk_buff_head retrans_skbs; 145 }; 146 147 /** 148 * struct nfp_fl_internal_ports - Flower APP priv data for additional ports 149 * @port_ids: Assignment of ids to any additional ports 150 * @lock: Lock for extra ports list 151 */ 152 struct nfp_fl_internal_ports { 153 struct idr port_ids; 154 spinlock_t lock; 155 }; 156 157 /** 158 * struct nfp_flower_priv - Flower APP per-vNIC priv data 159 * @app: Back pointer to app 160 * @nn: Pointer to vNIC 161 * @mask_id_seed: Seed used for mask hash table 162 * @flower_version: HW version of flower 163 * @flower_ext_feats: Bitmap of extra features the HW supports 164 * @flower_en_feats: Bitmap of features enabled by HW 165 * @stats_ids: List of free stats ids 166 * @mask_ids: List of free mask ids 167 * @mask_table: Hash table used to store masks 168 * @stats_ring_size: Maximum number of allowed stats ids 169 * @flow_table: Hash table used to store flower rules 170 * @stats: Stored stats updates for flower rules 171 * @stats_lock: Lock for flower rule stats updates 172 * @stats_ctx_table: Hash table to map stats contexts to its flow rule 173 * @cmsg_work: Workqueue for control messages processing 174 * @cmsg_skbs_high: List of higher priority skbs for control message 175 * processing 176 * @cmsg_skbs_low: List of lower priority skbs for control message 177 * processing 178 * @tun: Tunnel offload data 179 * @reify_replies: atomically stores the number of replies received 180 * from firmware for repr reify 181 * @reify_wait_queue: wait queue for repr reify response counting 182 * @mtu_conf: Configuration of repr MTU value 183 * @nfp_lag: Link aggregation data block 184 * @indr_block_cb_priv: List of priv data passed to indirect block cbs 185 * @non_repr_priv: List of offloaded non-repr ports and their priv data 186 * @active_mem_unit: Current active memory unit for flower rules 187 * @total_mem_units: Total number of available memory units for flower rules 188 * @internal_ports: Internal port ids used in offloaded rules 189 * @qos_stats_work: Workqueue for qos stats processing 190 * @qos_rate_limiters: Current active qos rate limiters 191 * @qos_stats_lock: Lock on qos stats updates 192 * @pre_tun_rule_cnt: Number of pre-tunnel rules offloaded 193 * @merge_table: Hash table to store merged flows 194 */ 195 struct nfp_flower_priv { 196 struct nfp_app *app; 197 struct nfp_net *nn; 198 u32 mask_id_seed; 199 u64 flower_version; 200 u64 flower_ext_feats; 201 u8 flower_en_feats; 202 struct nfp_fl_stats_id stats_ids; 203 struct nfp_fl_mask_id mask_ids; 204 DECLARE_HASHTABLE(mask_table, NFP_FLOWER_MASK_HASH_BITS); 205 u32 stats_ring_size; 206 struct rhashtable flow_table; 207 struct nfp_fl_stats *stats; 208 spinlock_t stats_lock; /* lock stats */ 209 struct rhashtable stats_ctx_table; 210 struct work_struct cmsg_work; 211 struct sk_buff_head cmsg_skbs_high; 212 struct sk_buff_head cmsg_skbs_low; 213 struct nfp_fl_tunnel_offloads tun; 214 atomic_t reify_replies; 215 wait_queue_head_t reify_wait_queue; 216 struct nfp_mtu_conf mtu_conf; 217 struct nfp_fl_lag nfp_lag; 218 struct list_head indr_block_cb_priv; 219 struct list_head non_repr_priv; 220 unsigned int active_mem_unit; 221 unsigned int total_mem_units; 222 struct nfp_fl_internal_ports internal_ports; 223 struct delayed_work qos_stats_work; 224 unsigned int qos_rate_limiters; 225 spinlock_t qos_stats_lock; /* Protect the qos stats */ 226 int pre_tun_rule_cnt; 227 struct rhashtable merge_table; 228 }; 229 230 /** 231 * struct nfp_fl_qos - Flower APP priv data for quality of service 232 * @netdev_port_id: NFP port number of repr with qos info 233 * @curr_stats: Currently stored stats updates for qos info 234 * @prev_stats: Previously stored updates for qos info 235 * @last_update: Stored time when last stats were updated 236 */ 237 struct nfp_fl_qos { 238 u32 netdev_port_id; 239 struct nfp_stat_pair curr_stats; 240 struct nfp_stat_pair prev_stats; 241 u64 last_update; 242 }; 243 244 /** 245 * struct nfp_flower_repr_priv - Flower APP per-repr priv data 246 * @nfp_repr: Back pointer to nfp_repr 247 * @lag_port_flags: Extended port flags to record lag state of repr 248 * @mac_offloaded: Flag indicating a MAC address is offloaded for repr 249 * @offloaded_mac_addr: MAC address that has been offloaded for repr 250 * @block_shared: Flag indicating if offload applies to shared blocks 251 * @mac_list: List entry of reprs that share the same offloaded MAC 252 * @qos_table: Stored info on filters implementing qos 253 * @on_bridge: Indicates if the repr is attached to a bridge 254 */ 255 struct nfp_flower_repr_priv { 256 struct nfp_repr *nfp_repr; 257 unsigned long lag_port_flags; 258 bool mac_offloaded; 259 u8 offloaded_mac_addr[ETH_ALEN]; 260 bool block_shared; 261 struct list_head mac_list; 262 struct nfp_fl_qos qos_table; 263 bool on_bridge; 264 }; 265 266 /** 267 * struct nfp_flower_non_repr_priv - Priv data for non-repr offloaded ports 268 * @list: List entry of offloaded reprs 269 * @netdev: Pointer to non-repr net_device 270 * @ref_count: Number of references held for this priv data 271 * @mac_offloaded: Flag indicating a MAC address is offloaded for device 272 * @offloaded_mac_addr: MAC address that has been offloaded for dev 273 */ 274 struct nfp_flower_non_repr_priv { 275 struct list_head list; 276 struct net_device *netdev; 277 int ref_count; 278 bool mac_offloaded; 279 u8 offloaded_mac_addr[ETH_ALEN]; 280 }; 281 282 struct nfp_fl_key_ls { 283 u32 key_layer_two; 284 u8 key_layer; 285 int key_size; 286 }; 287 288 struct nfp_fl_rule_metadata { 289 u8 key_len; 290 u8 mask_len; 291 u8 act_len; 292 u8 flags; 293 __be32 host_ctx_id; 294 __be64 host_cookie __packed; 295 __be64 flow_version __packed; 296 __be32 shortcut; 297 }; 298 299 struct nfp_fl_stats { 300 u64 pkts; 301 u64 bytes; 302 u64 used; 303 }; 304 305 /** 306 * struct nfp_ipv6_addr_entry - cached IPv6 addresses 307 * @ipv6_addr: IP address 308 * @ref_count: number of rules currently using this IP 309 * @list: list pointer 310 */ 311 struct nfp_ipv6_addr_entry { 312 struct in6_addr ipv6_addr; 313 int ref_count; 314 struct list_head list; 315 }; 316 317 struct nfp_fl_payload { 318 struct nfp_fl_rule_metadata meta; 319 unsigned long tc_flower_cookie; 320 struct rhash_head fl_node; 321 struct rcu_head rcu; 322 __be32 nfp_tun_ipv4_addr; 323 struct nfp_ipv6_addr_entry *nfp_tun_ipv6; 324 struct net_device *ingress_dev; 325 char *unmasked_data; 326 char *mask_data; 327 char *action_data; 328 struct list_head linked_flows; 329 bool in_hw; 330 struct { 331 struct net_device *dev; 332 __be16 vlan_tci; 333 __be16 port_idx; 334 } pre_tun_rule; 335 }; 336 337 struct nfp_fl_payload_link { 338 /* A link contains a pointer to a merge flow and an associated sub_flow. 339 * Each merge flow will feature in 2 links to its underlying sub_flows. 340 * A sub_flow will have at least 1 link to a merge flow or more if it 341 * has been used to create multiple merge flows. 342 * 343 * For a merge flow, 'linked_flows' in its nfp_fl_payload struct lists 344 * all links to sub_flows (sub_flow.flow) via merge.list. 345 * For a sub_flow, 'linked_flows' gives all links to merge flows it has 346 * formed (merge_flow.flow) via sub_flow.list. 347 */ 348 struct { 349 struct list_head list; 350 struct nfp_fl_payload *flow; 351 } merge_flow, sub_flow; 352 }; 353 354 extern const struct rhashtable_params nfp_flower_table_params; 355 extern const struct rhashtable_params merge_table_params; 356 357 struct nfp_merge_info { 358 u64 parent_ctx; 359 struct rhash_head ht_node; 360 }; 361 362 struct nfp_fl_stats_frame { 363 __be32 stats_con_id; 364 __be32 pkt_count; 365 __be64 byte_count; 366 __be64 stats_cookie; 367 }; 368 369 static inline bool 370 nfp_flower_internal_port_can_offload(struct nfp_app *app, 371 struct net_device *netdev) 372 { 373 struct nfp_flower_priv *app_priv = app->priv; 374 375 if (!(app_priv->flower_en_feats & NFP_FL_ENABLE_FLOW_MERGE)) 376 return false; 377 if (!netdev->rtnl_link_ops) 378 return false; 379 if (!strcmp(netdev->rtnl_link_ops->kind, "openvswitch")) 380 return true; 381 382 return false; 383 } 384 385 /* The address of the merged flow acts as its cookie. 386 * Cookies supplied to us by TC flower are also addresses to allocated 387 * memory and thus this scheme should not generate any collisions. 388 */ 389 static inline bool nfp_flower_is_merge_flow(struct nfp_fl_payload *flow_pay) 390 { 391 return flow_pay->tc_flower_cookie == (unsigned long)flow_pay; 392 } 393 394 static inline bool nfp_flower_is_supported_bridge(struct net_device *netdev) 395 { 396 return netif_is_ovs_master(netdev); 397 } 398 399 int nfp_flower_metadata_init(struct nfp_app *app, u64 host_ctx_count, 400 unsigned int host_ctx_split); 401 void nfp_flower_metadata_cleanup(struct nfp_app *app); 402 403 int nfp_flower_setup_tc(struct nfp_app *app, struct net_device *netdev, 404 enum tc_setup_type type, void *type_data); 405 int nfp_flower_merge_offloaded_flows(struct nfp_app *app, 406 struct nfp_fl_payload *sub_flow1, 407 struct nfp_fl_payload *sub_flow2); 408 int nfp_flower_compile_flow_match(struct nfp_app *app, 409 struct flow_cls_offload *flow, 410 struct nfp_fl_key_ls *key_ls, 411 struct net_device *netdev, 412 struct nfp_fl_payload *nfp_flow, 413 enum nfp_flower_tun_type tun_type, 414 struct netlink_ext_ack *extack); 415 int nfp_flower_compile_action(struct nfp_app *app, 416 struct flow_cls_offload *flow, 417 struct net_device *netdev, 418 struct nfp_fl_payload *nfp_flow, 419 struct netlink_ext_ack *extack); 420 int nfp_compile_flow_metadata(struct nfp_app *app, 421 struct flow_cls_offload *flow, 422 struct nfp_fl_payload *nfp_flow, 423 struct net_device *netdev, 424 struct netlink_ext_ack *extack); 425 void __nfp_modify_flow_metadata(struct nfp_flower_priv *priv, 426 struct nfp_fl_payload *nfp_flow); 427 int nfp_modify_flow_metadata(struct nfp_app *app, 428 struct nfp_fl_payload *nfp_flow); 429 430 struct nfp_fl_payload * 431 nfp_flower_search_fl_table(struct nfp_app *app, unsigned long tc_flower_cookie, 432 struct net_device *netdev); 433 struct nfp_fl_payload * 434 nfp_flower_get_fl_payload_from_ctx(struct nfp_app *app, u32 ctx_id); 435 struct nfp_fl_payload * 436 nfp_flower_remove_fl_table(struct nfp_app *app, unsigned long tc_flower_cookie); 437 438 void nfp_flower_rx_flow_stats(struct nfp_app *app, struct sk_buff *skb); 439 440 int nfp_tunnel_config_start(struct nfp_app *app); 441 void nfp_tunnel_config_stop(struct nfp_app *app); 442 int nfp_tunnel_mac_event_handler(struct nfp_app *app, 443 struct net_device *netdev, 444 unsigned long event, void *ptr); 445 void nfp_tunnel_del_ipv4_off(struct nfp_app *app, __be32 ipv4); 446 void nfp_tunnel_add_ipv4_off(struct nfp_app *app, __be32 ipv4); 447 void 448 nfp_tunnel_put_ipv6_off(struct nfp_app *app, struct nfp_ipv6_addr_entry *entry); 449 struct nfp_ipv6_addr_entry * 450 nfp_tunnel_add_ipv6_off(struct nfp_app *app, struct in6_addr *ipv6); 451 void nfp_tunnel_request_route_v4(struct nfp_app *app, struct sk_buff *skb); 452 void nfp_tunnel_request_route_v6(struct nfp_app *app, struct sk_buff *skb); 453 void nfp_tunnel_keep_alive(struct nfp_app *app, struct sk_buff *skb); 454 void nfp_tunnel_keep_alive_v6(struct nfp_app *app, struct sk_buff *skb); 455 void nfp_flower_lag_init(struct nfp_fl_lag *lag); 456 void nfp_flower_lag_cleanup(struct nfp_fl_lag *lag); 457 int nfp_flower_lag_reset(struct nfp_fl_lag *lag); 458 int nfp_flower_lag_netdev_event(struct nfp_flower_priv *priv, 459 struct net_device *netdev, 460 unsigned long event, void *ptr); 461 bool nfp_flower_lag_unprocessed_msg(struct nfp_app *app, struct sk_buff *skb); 462 int nfp_flower_lag_populate_pre_action(struct nfp_app *app, 463 struct net_device *master, 464 struct nfp_fl_pre_lag *pre_act, 465 struct netlink_ext_ack *extack); 466 int nfp_flower_lag_get_output_id(struct nfp_app *app, 467 struct net_device *master); 468 void nfp_flower_qos_init(struct nfp_app *app); 469 void nfp_flower_qos_cleanup(struct nfp_app *app); 470 int nfp_flower_setup_qos_offload(struct nfp_app *app, struct net_device *netdev, 471 struct tc_cls_matchall_offload *flow); 472 void nfp_flower_stats_rlim_reply(struct nfp_app *app, struct sk_buff *skb); 473 int nfp_flower_indr_setup_tc_cb(struct net_device *netdev, struct Qdisc *sch, void *cb_priv, 474 enum tc_setup_type type, void *type_data, 475 void *data, 476 void (*cleanup)(struct flow_block_cb *block_cb)); 477 void nfp_flower_setup_indr_tc_release(void *cb_priv); 478 479 void 480 __nfp_flower_non_repr_priv_get(struct nfp_flower_non_repr_priv *non_repr_priv); 481 struct nfp_flower_non_repr_priv * 482 nfp_flower_non_repr_priv_get(struct nfp_app *app, struct net_device *netdev); 483 void 484 __nfp_flower_non_repr_priv_put(struct nfp_flower_non_repr_priv *non_repr_priv); 485 void 486 nfp_flower_non_repr_priv_put(struct nfp_app *app, struct net_device *netdev); 487 u32 nfp_flower_get_port_id_from_netdev(struct nfp_app *app, 488 struct net_device *netdev); 489 int nfp_flower_xmit_pre_tun_flow(struct nfp_app *app, 490 struct nfp_fl_payload *flow); 491 int nfp_flower_xmit_pre_tun_del_flow(struct nfp_app *app, 492 struct nfp_fl_payload *flow); 493 #endif 494