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