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