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_QOS_PPS BIT(9) 51 #define NFP_FL_FEATS_HOST_ACK BIT(31) 52 53 #define NFP_FL_ENABLE_FLOW_MERGE BIT(0) 54 #define NFP_FL_ENABLE_LAG BIT(1) 55 56 #define NFP_FL_FEATS_HOST \ 57 (NFP_FL_FEATS_GENEVE | \ 58 NFP_FL_NBI_MTU_SETTING | \ 59 NFP_FL_FEATS_GENEVE_OPT | \ 60 NFP_FL_FEATS_VLAN_PCP | \ 61 NFP_FL_FEATS_VF_RLIM | \ 62 NFP_FL_FEATS_FLOW_MOD | \ 63 NFP_FL_FEATS_PRE_TUN_RULES | \ 64 NFP_FL_FEATS_IPV6_TUN | \ 65 NFP_FL_FEATS_VLAN_QINQ | \ 66 NFP_FL_FEATS_QOS_PPS) 67 68 struct nfp_fl_mask_id { 69 struct circ_buf mask_id_free_list; 70 ktime_t *last_used; 71 u8 init_unallocated; 72 }; 73 74 struct nfp_fl_stats_id { 75 struct circ_buf free_list; 76 u32 init_unalloc; 77 u8 repeated_em_count; 78 }; 79 80 /** 81 * struct nfp_fl_tunnel_offloads - priv data for tunnel offloads 82 * @offloaded_macs: Hashtable of the offloaded MAC addresses 83 * @ipv4_off_list: List of IPv4 addresses to offload 84 * @ipv6_off_list: List of IPv6 addresses to offload 85 * @neigh_off_list_v4: List of IPv4 neighbour offloads 86 * @neigh_off_list_v6: List of IPv6 neighbour offloads 87 * @ipv4_off_lock: Lock for the IPv4 address list 88 * @ipv6_off_lock: Lock for the IPv6 address list 89 * @neigh_off_lock_v4: Lock for the IPv4 neighbour address list 90 * @neigh_off_lock_v6: Lock for the IPv6 neighbour address list 91 * @mac_off_ids: IDA to manage id assignment for offloaded MACs 92 * @neigh_nb: Notifier to monitor neighbour state 93 */ 94 struct nfp_fl_tunnel_offloads { 95 struct rhashtable offloaded_macs; 96 struct list_head ipv4_off_list; 97 struct list_head ipv6_off_list; 98 struct list_head neigh_off_list_v4; 99 struct list_head neigh_off_list_v6; 100 struct mutex ipv4_off_lock; 101 struct mutex ipv6_off_lock; 102 spinlock_t neigh_off_lock_v4; 103 spinlock_t neigh_off_lock_v6; 104 struct ida mac_off_ids; 105 struct notifier_block neigh_nb; 106 }; 107 108 /** 109 * struct nfp_mtu_conf - manage MTU setting 110 * @portnum: NFP port number of repr with requested MTU change 111 * @requested_val: MTU value requested for repr 112 * @ack: Received ack that MTU has been correctly set 113 * @wait_q: Wait queue for MTU acknowledgements 114 * @lock: Lock for setting/reading MTU variables 115 */ 116 struct nfp_mtu_conf { 117 u32 portnum; 118 unsigned int requested_val; 119 bool ack; 120 wait_queue_head_t wait_q; 121 spinlock_t lock; 122 }; 123 124 /** 125 * struct nfp_fl_lag - Flower APP priv data for link aggregation 126 * @work: Work queue for writing configs to the HW 127 * @lock: Lock to protect lag_group_list 128 * @group_list: List of all master/slave groups offloaded 129 * @ida_handle: IDA to handle group ids 130 * @pkt_num: Incremented for each config packet sent 131 * @batch_ver: Incremented for each batch of config packets 132 * @global_inst: Instance allocator for groups 133 * @rst_cfg: Marker to reset HW LAG config 134 * @retrans_skbs: Cmsgs that could not be processed by HW and require 135 * retransmission 136 */ 137 struct nfp_fl_lag { 138 struct delayed_work work; 139 struct mutex lock; 140 struct list_head group_list; 141 struct ida ida_handle; 142 unsigned int pkt_num; 143 unsigned int batch_ver; 144 u8 global_inst; 145 bool rst_cfg; 146 struct sk_buff_head retrans_skbs; 147 }; 148 149 /** 150 * struct nfp_fl_internal_ports - Flower APP priv data for additional ports 151 * @port_ids: Assignment of ids to any additional ports 152 * @lock: Lock for extra ports list 153 */ 154 struct nfp_fl_internal_ports { 155 struct idr port_ids; 156 spinlock_t lock; 157 }; 158 159 /** 160 * struct nfp_flower_priv - Flower APP per-vNIC priv data 161 * @app: Back pointer to app 162 * @nn: Pointer to vNIC 163 * @mask_id_seed: Seed used for mask hash table 164 * @flower_version: HW version of flower 165 * @flower_ext_feats: Bitmap of extra features the HW supports 166 * @flower_en_feats: Bitmap of features enabled by HW 167 * @stats_ids: List of free stats ids 168 * @mask_ids: List of free mask ids 169 * @mask_table: Hash table used to store masks 170 * @stats_ring_size: Maximum number of allowed stats ids 171 * @flow_table: Hash table used to store flower rules 172 * @stats: Stored stats updates for flower rules 173 * @stats_lock: Lock for flower rule stats updates 174 * @stats_ctx_table: Hash table to map stats contexts to its flow rule 175 * @cmsg_work: Workqueue for control messages processing 176 * @cmsg_skbs_high: List of higher priority skbs for control message 177 * processing 178 * @cmsg_skbs_low: List of lower priority skbs for control message 179 * processing 180 * @tun: Tunnel offload data 181 * @reify_replies: atomically stores the number of replies received 182 * from firmware for repr reify 183 * @reify_wait_queue: wait queue for repr reify response counting 184 * @mtu_conf: Configuration of repr MTU value 185 * @nfp_lag: Link aggregation data block 186 * @indr_block_cb_priv: List of priv data passed to indirect block cbs 187 * @non_repr_priv: List of offloaded non-repr ports and their priv data 188 * @active_mem_unit: Current active memory unit for flower rules 189 * @total_mem_units: Total number of available memory units for flower rules 190 * @internal_ports: Internal port ids used in offloaded rules 191 * @qos_stats_work: Workqueue for qos stats processing 192 * @qos_rate_limiters: Current active qos rate limiters 193 * @qos_stats_lock: Lock on qos stats updates 194 * @pre_tun_rule_cnt: Number of pre-tunnel rules offloaded 195 * @merge_table: Hash table to store merged flows 196 */ 197 struct nfp_flower_priv { 198 struct nfp_app *app; 199 struct nfp_net *nn; 200 u32 mask_id_seed; 201 u64 flower_version; 202 u64 flower_ext_feats; 203 u8 flower_en_feats; 204 struct nfp_fl_stats_id stats_ids; 205 struct nfp_fl_mask_id mask_ids; 206 DECLARE_HASHTABLE(mask_table, NFP_FLOWER_MASK_HASH_BITS); 207 u32 stats_ring_size; 208 struct rhashtable flow_table; 209 struct nfp_fl_stats *stats; 210 spinlock_t stats_lock; /* lock stats */ 211 struct rhashtable stats_ctx_table; 212 struct work_struct cmsg_work; 213 struct sk_buff_head cmsg_skbs_high; 214 struct sk_buff_head cmsg_skbs_low; 215 struct nfp_fl_tunnel_offloads tun; 216 atomic_t reify_replies; 217 wait_queue_head_t reify_wait_queue; 218 struct nfp_mtu_conf mtu_conf; 219 struct nfp_fl_lag nfp_lag; 220 struct list_head indr_block_cb_priv; 221 struct list_head non_repr_priv; 222 unsigned int active_mem_unit; 223 unsigned int total_mem_units; 224 struct nfp_fl_internal_ports internal_ports; 225 struct delayed_work qos_stats_work; 226 unsigned int qos_rate_limiters; 227 spinlock_t qos_stats_lock; /* Protect the qos stats */ 228 int pre_tun_rule_cnt; 229 struct rhashtable merge_table; 230 }; 231 232 /** 233 * struct nfp_fl_qos - Flower APP priv data for quality of service 234 * @netdev_port_id: NFP port number of repr with qos info 235 * @curr_stats: Currently stored stats updates for qos info 236 * @prev_stats: Previously stored updates for qos info 237 * @last_update: Stored time when last stats were updated 238 */ 239 struct nfp_fl_qos { 240 u32 netdev_port_id; 241 struct nfp_stat_pair curr_stats; 242 struct nfp_stat_pair prev_stats; 243 u64 last_update; 244 }; 245 246 /** 247 * struct nfp_flower_repr_priv - Flower APP per-repr priv data 248 * @nfp_repr: Back pointer to nfp_repr 249 * @lag_port_flags: Extended port flags to record lag state of repr 250 * @mac_offloaded: Flag indicating a MAC address is offloaded for repr 251 * @offloaded_mac_addr: MAC address that has been offloaded for repr 252 * @block_shared: Flag indicating if offload applies to shared blocks 253 * @mac_list: List entry of reprs that share the same offloaded MAC 254 * @qos_table: Stored info on filters implementing qos 255 * @on_bridge: Indicates if the repr is attached to a bridge 256 */ 257 struct nfp_flower_repr_priv { 258 struct nfp_repr *nfp_repr; 259 unsigned long lag_port_flags; 260 bool mac_offloaded; 261 u8 offloaded_mac_addr[ETH_ALEN]; 262 bool block_shared; 263 struct list_head mac_list; 264 struct nfp_fl_qos qos_table; 265 bool on_bridge; 266 }; 267 268 /** 269 * struct nfp_flower_non_repr_priv - Priv data for non-repr offloaded ports 270 * @list: List entry of offloaded reprs 271 * @netdev: Pointer to non-repr net_device 272 * @ref_count: Number of references held for this priv data 273 * @mac_offloaded: Flag indicating a MAC address is offloaded for device 274 * @offloaded_mac_addr: MAC address that has been offloaded for dev 275 */ 276 struct nfp_flower_non_repr_priv { 277 struct list_head list; 278 struct net_device *netdev; 279 int ref_count; 280 bool mac_offloaded; 281 u8 offloaded_mac_addr[ETH_ALEN]; 282 }; 283 284 struct nfp_fl_key_ls { 285 u32 key_layer_two; 286 u8 key_layer; 287 int key_size; 288 }; 289 290 struct nfp_fl_rule_metadata { 291 u8 key_len; 292 u8 mask_len; 293 u8 act_len; 294 u8 flags; 295 __be32 host_ctx_id; 296 __be64 host_cookie __packed; 297 __be64 flow_version __packed; 298 __be32 shortcut; 299 }; 300 301 struct nfp_fl_stats { 302 u64 pkts; 303 u64 bytes; 304 u64 used; 305 }; 306 307 /** 308 * struct nfp_ipv6_addr_entry - cached IPv6 addresses 309 * @ipv6_addr: IP address 310 * @ref_count: number of rules currently using this IP 311 * @list: list pointer 312 */ 313 struct nfp_ipv6_addr_entry { 314 struct in6_addr ipv6_addr; 315 int ref_count; 316 struct list_head list; 317 }; 318 319 struct nfp_fl_payload { 320 struct nfp_fl_rule_metadata meta; 321 unsigned long tc_flower_cookie; 322 struct rhash_head fl_node; 323 struct rcu_head rcu; 324 __be32 nfp_tun_ipv4_addr; 325 struct nfp_ipv6_addr_entry *nfp_tun_ipv6; 326 struct net_device *ingress_dev; 327 char *unmasked_data; 328 char *mask_data; 329 char *action_data; 330 struct list_head linked_flows; 331 bool in_hw; 332 struct { 333 struct net_device *dev; 334 __be16 vlan_tci; 335 __be16 port_idx; 336 } pre_tun_rule; 337 }; 338 339 struct nfp_fl_payload_link { 340 /* A link contains a pointer to a merge flow and an associated sub_flow. 341 * Each merge flow will feature in 2 links to its underlying sub_flows. 342 * A sub_flow will have at least 1 link to a merge flow or more if it 343 * has been used to create multiple merge flows. 344 * 345 * For a merge flow, 'linked_flows' in its nfp_fl_payload struct lists 346 * all links to sub_flows (sub_flow.flow) via merge.list. 347 * For a sub_flow, 'linked_flows' gives all links to merge flows it has 348 * formed (merge_flow.flow) via sub_flow.list. 349 */ 350 struct { 351 struct list_head list; 352 struct nfp_fl_payload *flow; 353 } merge_flow, sub_flow; 354 }; 355 356 extern const struct rhashtable_params nfp_flower_table_params; 357 extern const struct rhashtable_params merge_table_params; 358 359 struct nfp_merge_info { 360 u64 parent_ctx; 361 struct rhash_head ht_node; 362 }; 363 364 struct nfp_fl_stats_frame { 365 __be32 stats_con_id; 366 __be32 pkt_count; 367 __be64 byte_count; 368 __be64 stats_cookie; 369 }; 370 371 static inline bool 372 nfp_flower_internal_port_can_offload(struct nfp_app *app, 373 struct net_device *netdev) 374 { 375 struct nfp_flower_priv *app_priv = app->priv; 376 377 if (!(app_priv->flower_en_feats & NFP_FL_ENABLE_FLOW_MERGE)) 378 return false; 379 if (!netdev->rtnl_link_ops) 380 return false; 381 if (!strcmp(netdev->rtnl_link_ops->kind, "openvswitch")) 382 return true; 383 384 return false; 385 } 386 387 /* The address of the merged flow acts as its cookie. 388 * Cookies supplied to us by TC flower are also addresses to allocated 389 * memory and thus this scheme should not generate any collisions. 390 */ 391 static inline bool nfp_flower_is_merge_flow(struct nfp_fl_payload *flow_pay) 392 { 393 return flow_pay->tc_flower_cookie == (unsigned long)flow_pay; 394 } 395 396 static inline bool nfp_flower_is_supported_bridge(struct net_device *netdev) 397 { 398 return netif_is_ovs_master(netdev); 399 } 400 401 int nfp_flower_metadata_init(struct nfp_app *app, u64 host_ctx_count, 402 unsigned int host_ctx_split); 403 void nfp_flower_metadata_cleanup(struct nfp_app *app); 404 405 int nfp_flower_setup_tc(struct nfp_app *app, struct net_device *netdev, 406 enum tc_setup_type type, void *type_data); 407 int nfp_flower_merge_offloaded_flows(struct nfp_app *app, 408 struct nfp_fl_payload *sub_flow1, 409 struct nfp_fl_payload *sub_flow2); 410 int nfp_flower_compile_flow_match(struct nfp_app *app, 411 struct flow_cls_offload *flow, 412 struct nfp_fl_key_ls *key_ls, 413 struct net_device *netdev, 414 struct nfp_fl_payload *nfp_flow, 415 enum nfp_flower_tun_type tun_type, 416 struct netlink_ext_ack *extack); 417 int nfp_flower_compile_action(struct nfp_app *app, 418 struct flow_cls_offload *flow, 419 struct net_device *netdev, 420 struct nfp_fl_payload *nfp_flow, 421 struct netlink_ext_ack *extack); 422 int nfp_compile_flow_metadata(struct nfp_app *app, 423 struct flow_cls_offload *flow, 424 struct nfp_fl_payload *nfp_flow, 425 struct net_device *netdev, 426 struct netlink_ext_ack *extack); 427 void __nfp_modify_flow_metadata(struct nfp_flower_priv *priv, 428 struct nfp_fl_payload *nfp_flow); 429 int nfp_modify_flow_metadata(struct nfp_app *app, 430 struct nfp_fl_payload *nfp_flow); 431 432 struct nfp_fl_payload * 433 nfp_flower_search_fl_table(struct nfp_app *app, unsigned long tc_flower_cookie, 434 struct net_device *netdev); 435 struct nfp_fl_payload * 436 nfp_flower_get_fl_payload_from_ctx(struct nfp_app *app, u32 ctx_id); 437 struct nfp_fl_payload * 438 nfp_flower_remove_fl_table(struct nfp_app *app, unsigned long tc_flower_cookie); 439 440 void nfp_flower_rx_flow_stats(struct nfp_app *app, struct sk_buff *skb); 441 442 int nfp_tunnel_config_start(struct nfp_app *app); 443 void nfp_tunnel_config_stop(struct nfp_app *app); 444 int nfp_tunnel_mac_event_handler(struct nfp_app *app, 445 struct net_device *netdev, 446 unsigned long event, void *ptr); 447 void nfp_tunnel_del_ipv4_off(struct nfp_app *app, __be32 ipv4); 448 void nfp_tunnel_add_ipv4_off(struct nfp_app *app, __be32 ipv4); 449 void 450 nfp_tunnel_put_ipv6_off(struct nfp_app *app, struct nfp_ipv6_addr_entry *entry); 451 struct nfp_ipv6_addr_entry * 452 nfp_tunnel_add_ipv6_off(struct nfp_app *app, struct in6_addr *ipv6); 453 void nfp_tunnel_request_route_v4(struct nfp_app *app, struct sk_buff *skb); 454 void nfp_tunnel_request_route_v6(struct nfp_app *app, struct sk_buff *skb); 455 void nfp_tunnel_keep_alive(struct nfp_app *app, struct sk_buff *skb); 456 void nfp_tunnel_keep_alive_v6(struct nfp_app *app, struct sk_buff *skb); 457 void nfp_flower_lag_init(struct nfp_fl_lag *lag); 458 void nfp_flower_lag_cleanup(struct nfp_fl_lag *lag); 459 int nfp_flower_lag_reset(struct nfp_fl_lag *lag); 460 int nfp_flower_lag_netdev_event(struct nfp_flower_priv *priv, 461 struct net_device *netdev, 462 unsigned long event, void *ptr); 463 bool nfp_flower_lag_unprocessed_msg(struct nfp_app *app, struct sk_buff *skb); 464 int nfp_flower_lag_populate_pre_action(struct nfp_app *app, 465 struct net_device *master, 466 struct nfp_fl_pre_lag *pre_act, 467 struct netlink_ext_ack *extack); 468 int nfp_flower_lag_get_output_id(struct nfp_app *app, 469 struct net_device *master); 470 void nfp_flower_qos_init(struct nfp_app *app); 471 void nfp_flower_qos_cleanup(struct nfp_app *app); 472 int nfp_flower_setup_qos_offload(struct nfp_app *app, struct net_device *netdev, 473 struct tc_cls_matchall_offload *flow); 474 void nfp_flower_stats_rlim_reply(struct nfp_app *app, struct sk_buff *skb); 475 int nfp_flower_indr_setup_tc_cb(struct net_device *netdev, struct Qdisc *sch, void *cb_priv, 476 enum tc_setup_type type, void *type_data, 477 void *data, 478 void (*cleanup)(struct flow_block_cb *block_cb)); 479 void nfp_flower_setup_indr_tc_release(void *cb_priv); 480 481 void 482 __nfp_flower_non_repr_priv_get(struct nfp_flower_non_repr_priv *non_repr_priv); 483 struct nfp_flower_non_repr_priv * 484 nfp_flower_non_repr_priv_get(struct nfp_app *app, struct net_device *netdev); 485 void 486 __nfp_flower_non_repr_priv_put(struct nfp_flower_non_repr_priv *non_repr_priv); 487 void 488 nfp_flower_non_repr_priv_put(struct nfp_app *app, struct net_device *netdev); 489 u32 nfp_flower_get_port_id_from_netdev(struct nfp_app *app, 490 struct net_device *netdev); 491 int nfp_flower_xmit_pre_tun_flow(struct nfp_app *app, 492 struct nfp_fl_payload *flow); 493 int nfp_flower_xmit_pre_tun_del_flow(struct nfp_app *app, 494 struct nfp_fl_payload *flow); 495 #endif 496