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