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 FIELD_SIZEOF(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_FLOW_MERGE BIT(30) 46 #define NFP_FL_FEATS_LAG BIT(31) 47 48 struct nfp_fl_mask_id { 49 struct circ_buf mask_id_free_list; 50 ktime_t *last_used; 51 u8 init_unallocated; 52 }; 53 54 struct nfp_fl_stats_id { 55 struct circ_buf free_list; 56 u32 init_unalloc; 57 u8 repeated_em_count; 58 }; 59 60 /** 61 * struct nfp_fl_tunnel_offloads - priv data for tunnel offloads 62 * @offloaded_macs: Hashtable of the offloaded MAC addresses 63 * @ipv4_off_list: List of IPv4 addresses to offload 64 * @neigh_off_list: List of neighbour offloads 65 * @ipv4_off_lock: Lock for the IPv4 address list 66 * @neigh_off_lock: Lock for the neighbour address list 67 * @mac_off_ids: IDA to manage id assignment for offloaded MACs 68 * @neigh_nb: Notifier to monitor neighbour state 69 */ 70 struct nfp_fl_tunnel_offloads { 71 struct rhashtable offloaded_macs; 72 struct list_head ipv4_off_list; 73 struct list_head neigh_off_list; 74 struct mutex ipv4_off_lock; 75 spinlock_t neigh_off_lock; 76 struct ida mac_off_ids; 77 struct notifier_block neigh_nb; 78 }; 79 80 /** 81 * struct nfp_mtu_conf - manage MTU setting 82 * @portnum: NFP port number of repr with requested MTU change 83 * @requested_val: MTU value requested for repr 84 * @ack: Received ack that MTU has been correctly set 85 * @wait_q: Wait queue for MTU acknowledgements 86 * @lock: Lock for setting/reading MTU variables 87 */ 88 struct nfp_mtu_conf { 89 u32 portnum; 90 unsigned int requested_val; 91 bool ack; 92 wait_queue_head_t wait_q; 93 spinlock_t lock; 94 }; 95 96 /** 97 * struct nfp_fl_lag - Flower APP priv data for link aggregation 98 * @work: Work queue for writing configs to the HW 99 * @lock: Lock to protect lag_group_list 100 * @group_list: List of all master/slave groups offloaded 101 * @ida_handle: IDA to handle group ids 102 * @pkt_num: Incremented for each config packet sent 103 * @batch_ver: Incremented for each batch of config packets 104 * @global_inst: Instance allocator for groups 105 * @rst_cfg: Marker to reset HW LAG config 106 * @retrans_skbs: Cmsgs that could not be processed by HW and require 107 * retransmission 108 */ 109 struct nfp_fl_lag { 110 struct delayed_work work; 111 struct mutex lock; 112 struct list_head group_list; 113 struct ida ida_handle; 114 unsigned int pkt_num; 115 unsigned int batch_ver; 116 u8 global_inst; 117 bool rst_cfg; 118 struct sk_buff_head retrans_skbs; 119 }; 120 121 /** 122 * struct nfp_fl_internal_ports - Flower APP priv data for additional ports 123 * @port_ids: Assignment of ids to any additional ports 124 * @lock: Lock for extra ports list 125 */ 126 struct nfp_fl_internal_ports { 127 struct idr port_ids; 128 spinlock_t lock; 129 }; 130 131 /** 132 * struct nfp_flower_priv - Flower APP per-vNIC priv data 133 * @app: Back pointer to app 134 * @nn: Pointer to vNIC 135 * @mask_id_seed: Seed used for mask hash table 136 * @flower_version: HW version of flower 137 * @flower_ext_feats: Bitmap of extra features the HW supports 138 * @stats_ids: List of free stats ids 139 * @mask_ids: List of free mask ids 140 * @mask_table: Hash table used to store masks 141 * @stats_ring_size: Maximum number of allowed stats ids 142 * @flow_table: Hash table used to store flower rules 143 * @stats: Stored stats updates for flower rules 144 * @stats_lock: Lock for flower rule stats updates 145 * @stats_ctx_table: Hash table to map stats contexts to its flow rule 146 * @cmsg_work: Workqueue for control messages processing 147 * @cmsg_skbs_high: List of higher priority skbs for control message 148 * processing 149 * @cmsg_skbs_low: List of lower priority skbs for control message 150 * processing 151 * @tun: Tunnel offload data 152 * @reify_replies: atomically stores the number of replies received 153 * from firmware for repr reify 154 * @reify_wait_queue: wait queue for repr reify response counting 155 * @mtu_conf: Configuration of repr MTU value 156 * @nfp_lag: Link aggregation data block 157 * @indr_block_cb_priv: List of priv data passed to indirect block cbs 158 * @non_repr_priv: List of offloaded non-repr ports and their priv data 159 * @active_mem_unit: Current active memory unit for flower rules 160 * @total_mem_units: Total number of available memory units for flower rules 161 * @internal_ports: Internal port ids used in offloaded rules 162 * @qos_stats_work: Workqueue for qos stats processing 163 * @qos_rate_limiters: Current active qos rate limiters 164 * @qos_stats_lock: Lock on qos stats updates 165 */ 166 struct nfp_flower_priv { 167 struct nfp_app *app; 168 struct nfp_net *nn; 169 u32 mask_id_seed; 170 u64 flower_version; 171 u64 flower_ext_feats; 172 struct nfp_fl_stats_id stats_ids; 173 struct nfp_fl_mask_id mask_ids; 174 DECLARE_HASHTABLE(mask_table, NFP_FLOWER_MASK_HASH_BITS); 175 u32 stats_ring_size; 176 struct rhashtable flow_table; 177 struct nfp_fl_stats *stats; 178 spinlock_t stats_lock; /* lock stats */ 179 struct rhashtable stats_ctx_table; 180 struct work_struct cmsg_work; 181 struct sk_buff_head cmsg_skbs_high; 182 struct sk_buff_head cmsg_skbs_low; 183 struct nfp_fl_tunnel_offloads tun; 184 atomic_t reify_replies; 185 wait_queue_head_t reify_wait_queue; 186 struct nfp_mtu_conf mtu_conf; 187 struct nfp_fl_lag nfp_lag; 188 struct list_head indr_block_cb_priv; 189 struct list_head non_repr_priv; 190 unsigned int active_mem_unit; 191 unsigned int total_mem_units; 192 struct nfp_fl_internal_ports internal_ports; 193 struct delayed_work qos_stats_work; 194 unsigned int qos_rate_limiters; 195 spinlock_t qos_stats_lock; /* Protect the qos stats */ 196 }; 197 198 /** 199 * struct nfp_fl_qos - Flower APP priv data for quality of service 200 * @netdev_port_id: NFP port number of repr with qos info 201 * @curr_stats: Currently stored stats updates for qos info 202 * @prev_stats: Previously stored updates for qos info 203 * @last_update: Stored time when last stats were updated 204 */ 205 struct nfp_fl_qos { 206 u32 netdev_port_id; 207 struct nfp_stat_pair curr_stats; 208 struct nfp_stat_pair prev_stats; 209 u64 last_update; 210 }; 211 212 /** 213 * struct nfp_flower_repr_priv - Flower APP per-repr priv data 214 * @nfp_repr: Back pointer to nfp_repr 215 * @lag_port_flags: Extended port flags to record lag state of repr 216 * @mac_offloaded: Flag indicating a MAC address is offloaded for repr 217 * @offloaded_mac_addr: MAC address that has been offloaded for repr 218 * @block_shared: Flag indicating if offload applies to shared blocks 219 * @mac_list: List entry of reprs that share the same offloaded MAC 220 * @qos_table: Stored info on filters implementing qos 221 */ 222 struct nfp_flower_repr_priv { 223 struct nfp_repr *nfp_repr; 224 unsigned long lag_port_flags; 225 bool mac_offloaded; 226 u8 offloaded_mac_addr[ETH_ALEN]; 227 bool block_shared; 228 struct list_head mac_list; 229 struct nfp_fl_qos qos_table; 230 }; 231 232 /** 233 * struct nfp_flower_non_repr_priv - Priv data for non-repr offloaded ports 234 * @list: List entry of offloaded reprs 235 * @netdev: Pointer to non-repr net_device 236 * @ref_count: Number of references held for this priv data 237 * @mac_offloaded: Flag indicating a MAC address is offloaded for device 238 * @offloaded_mac_addr: MAC address that has been offloaded for dev 239 */ 240 struct nfp_flower_non_repr_priv { 241 struct list_head list; 242 struct net_device *netdev; 243 int ref_count; 244 bool mac_offloaded; 245 u8 offloaded_mac_addr[ETH_ALEN]; 246 }; 247 248 struct nfp_fl_key_ls { 249 u32 key_layer_two; 250 u8 key_layer; 251 int key_size; 252 }; 253 254 struct nfp_fl_rule_metadata { 255 u8 key_len; 256 u8 mask_len; 257 u8 act_len; 258 u8 flags; 259 __be32 host_ctx_id; 260 __be64 host_cookie __packed; 261 __be64 flow_version __packed; 262 __be32 shortcut; 263 }; 264 265 struct nfp_fl_stats { 266 u64 pkts; 267 u64 bytes; 268 u64 used; 269 }; 270 271 struct nfp_fl_payload { 272 struct nfp_fl_rule_metadata meta; 273 unsigned long tc_flower_cookie; 274 struct rhash_head fl_node; 275 struct rcu_head rcu; 276 __be32 nfp_tun_ipv4_addr; 277 struct net_device *ingress_dev; 278 char *unmasked_data; 279 char *mask_data; 280 char *action_data; 281 struct list_head linked_flows; 282 bool in_hw; 283 }; 284 285 struct nfp_fl_payload_link { 286 /* A link contains a pointer to a merge flow and an associated sub_flow. 287 * Each merge flow will feature in 2 links to its underlying sub_flows. 288 * A sub_flow will have at least 1 link to a merge flow or more if it 289 * has been used to create multiple merge flows. 290 * 291 * For a merge flow, 'linked_flows' in its nfp_fl_payload struct lists 292 * all links to sub_flows (sub_flow.flow) via merge.list. 293 * For a sub_flow, 'linked_flows' gives all links to merge flows it has 294 * formed (merge_flow.flow) via sub_flow.list. 295 */ 296 struct { 297 struct list_head list; 298 struct nfp_fl_payload *flow; 299 } merge_flow, sub_flow; 300 }; 301 302 extern const struct rhashtable_params nfp_flower_table_params; 303 304 struct nfp_fl_stats_frame { 305 __be32 stats_con_id; 306 __be32 pkt_count; 307 __be64 byte_count; 308 __be64 stats_cookie; 309 }; 310 311 static inline bool 312 nfp_flower_internal_port_can_offload(struct nfp_app *app, 313 struct net_device *netdev) 314 { 315 struct nfp_flower_priv *app_priv = app->priv; 316 317 if (!(app_priv->flower_ext_feats & NFP_FL_FEATS_FLOW_MERGE)) 318 return false; 319 if (!netdev->rtnl_link_ops) 320 return false; 321 if (!strcmp(netdev->rtnl_link_ops->kind, "openvswitch")) 322 return true; 323 324 return false; 325 } 326 327 /* The address of the merged flow acts as its cookie. 328 * Cookies supplied to us by TC flower are also addresses to allocated 329 * memory and thus this scheme should not generate any collisions. 330 */ 331 static inline bool nfp_flower_is_merge_flow(struct nfp_fl_payload *flow_pay) 332 { 333 return flow_pay->tc_flower_cookie == (unsigned long)flow_pay; 334 } 335 336 int nfp_flower_metadata_init(struct nfp_app *app, u64 host_ctx_count, 337 unsigned int host_ctx_split); 338 void nfp_flower_metadata_cleanup(struct nfp_app *app); 339 340 int nfp_flower_setup_tc(struct nfp_app *app, struct net_device *netdev, 341 enum tc_setup_type type, void *type_data); 342 int nfp_flower_merge_offloaded_flows(struct nfp_app *app, 343 struct nfp_fl_payload *sub_flow1, 344 struct nfp_fl_payload *sub_flow2); 345 int nfp_flower_compile_flow_match(struct nfp_app *app, 346 struct tc_cls_flower_offload *flow, 347 struct nfp_fl_key_ls *key_ls, 348 struct net_device *netdev, 349 struct nfp_fl_payload *nfp_flow, 350 enum nfp_flower_tun_type tun_type); 351 int nfp_flower_compile_action(struct nfp_app *app, 352 struct tc_cls_flower_offload *flow, 353 struct net_device *netdev, 354 struct nfp_fl_payload *nfp_flow); 355 int nfp_compile_flow_metadata(struct nfp_app *app, 356 struct tc_cls_flower_offload *flow, 357 struct nfp_fl_payload *nfp_flow, 358 struct net_device *netdev); 359 void __nfp_modify_flow_metadata(struct nfp_flower_priv *priv, 360 struct nfp_fl_payload *nfp_flow); 361 int nfp_modify_flow_metadata(struct nfp_app *app, 362 struct nfp_fl_payload *nfp_flow); 363 364 struct nfp_fl_payload * 365 nfp_flower_search_fl_table(struct nfp_app *app, unsigned long tc_flower_cookie, 366 struct net_device *netdev); 367 struct nfp_fl_payload * 368 nfp_flower_get_fl_payload_from_ctx(struct nfp_app *app, u32 ctx_id); 369 struct nfp_fl_payload * 370 nfp_flower_remove_fl_table(struct nfp_app *app, unsigned long tc_flower_cookie); 371 372 void nfp_flower_rx_flow_stats(struct nfp_app *app, struct sk_buff *skb); 373 374 int nfp_tunnel_config_start(struct nfp_app *app); 375 void nfp_tunnel_config_stop(struct nfp_app *app); 376 int nfp_tunnel_mac_event_handler(struct nfp_app *app, 377 struct net_device *netdev, 378 unsigned long event, void *ptr); 379 void nfp_tunnel_del_ipv4_off(struct nfp_app *app, __be32 ipv4); 380 void nfp_tunnel_add_ipv4_off(struct nfp_app *app, __be32 ipv4); 381 void nfp_tunnel_request_route(struct nfp_app *app, struct sk_buff *skb); 382 void nfp_tunnel_keep_alive(struct nfp_app *app, struct sk_buff *skb); 383 void nfp_flower_lag_init(struct nfp_fl_lag *lag); 384 void nfp_flower_lag_cleanup(struct nfp_fl_lag *lag); 385 int nfp_flower_lag_reset(struct nfp_fl_lag *lag); 386 int nfp_flower_lag_netdev_event(struct nfp_flower_priv *priv, 387 struct net_device *netdev, 388 unsigned long event, void *ptr); 389 bool nfp_flower_lag_unprocessed_msg(struct nfp_app *app, struct sk_buff *skb); 390 int nfp_flower_lag_populate_pre_action(struct nfp_app *app, 391 struct net_device *master, 392 struct nfp_fl_pre_lag *pre_act); 393 int nfp_flower_lag_get_output_id(struct nfp_app *app, 394 struct net_device *master); 395 void nfp_flower_qos_init(struct nfp_app *app); 396 void nfp_flower_qos_cleanup(struct nfp_app *app); 397 int nfp_flower_setup_qos_offload(struct nfp_app *app, struct net_device *netdev, 398 struct tc_cls_matchall_offload *flow); 399 void nfp_flower_stats_rlim_reply(struct nfp_app *app, struct sk_buff *skb); 400 int nfp_flower_reg_indir_block_handler(struct nfp_app *app, 401 struct net_device *netdev, 402 unsigned long event); 403 404 void 405 __nfp_flower_non_repr_priv_get(struct nfp_flower_non_repr_priv *non_repr_priv); 406 struct nfp_flower_non_repr_priv * 407 nfp_flower_non_repr_priv_get(struct nfp_app *app, struct net_device *netdev); 408 void 409 __nfp_flower_non_repr_priv_put(struct nfp_flower_non_repr_priv *non_repr_priv); 410 void 411 nfp_flower_non_repr_priv_put(struct nfp_app *app, struct net_device *netdev); 412 u32 nfp_flower_get_port_id_from_netdev(struct nfp_app *app, 413 struct net_device *netdev); 414 #endif 415