1 /* SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB */ 2 /* Copyright (c) 2015 - 2021 Intel Corporation */ 3 #ifndef IRDMA_CM_H 4 #define IRDMA_CM_H 5 6 #define IRDMA_MPA_REQUEST_ACCEPT 1 7 #define IRDMA_MPA_REQUEST_REJECT 2 8 9 /* IETF MPA -- defines */ 10 #define IEFT_MPA_KEY_REQ "MPA ID Req Frame" 11 #define IEFT_MPA_KEY_REP "MPA ID Rep Frame" 12 #define IETF_MPA_KEY_SIZE 16 13 #define IETF_MPA_VER 1 14 #define IETF_MAX_PRIV_DATA_LEN 512 15 #define IETF_MPA_FRAME_SIZE 20 16 #define IETF_RTR_MSG_SIZE 4 17 #define IETF_MPA_V2_FLAG 0x10 18 #define SNDMARKER_SEQNMASK 0x000001ff 19 #define IRDMA_MAX_IETF_SIZE 32 20 21 /* IETF RTR MSG Fields */ 22 #define IETF_PEER_TO_PEER 0x8000 23 #define IETF_FLPDU_ZERO_LEN 0x4000 24 #define IETF_RDMA0_WRITE 0x8000 25 #define IETF_RDMA0_READ 0x4000 26 #define IETF_NO_IRD_ORD 0x3fff 27 28 #define MAX_PORTS 65536 29 30 #define IRDMA_PASSIVE_STATE_INDICATED 0 31 #define IRDMA_DO_NOT_SEND_RESET_EVENT 1 32 #define IRDMA_SEND_RESET_EVENT 2 33 34 #define MAX_IRDMA_IFS 4 35 36 #define SET_ACK 1 37 #define SET_SYN 2 38 #define SET_FIN 4 39 #define SET_RST 8 40 41 #define TCP_OPTIONS_PADDING 3 42 43 #define IRDMA_DEFAULT_RETRYS 64 44 #define IRDMA_DEFAULT_RETRANS 32 45 #define IRDMA_DEFAULT_TTL 0x40 46 #define IRDMA_DEFAULT_RTT_VAR 6 47 #define IRDMA_DEFAULT_SS_THRESH 0x3fffffff 48 #define IRDMA_DEFAULT_REXMIT_THRESH 8 49 50 #define IRDMA_RETRY_TIMEOUT HZ 51 #define IRDMA_SHORT_TIME 10 52 #define IRDMA_LONG_TIME (2 * HZ) 53 #define IRDMA_MAX_TIMEOUT ((unsigned long)(12 * HZ)) 54 55 #define IRDMA_CM_HASHTABLE_SIZE 1024 56 #define IRDMA_CM_TCP_TIMER_INTERVAL 3000 57 #define IRDMA_CM_DEFAULT_MTU 1540 58 #define IRDMA_CM_DEFAULT_FRAME_CNT 10 59 #define IRDMA_CM_THREAD_STACK_SIZE 256 60 #define IRDMA_CM_DEFAULT_RCV_WND 64240 61 #define IRDMA_CM_DEFAULT_RCV_WND_SCALED 0x3FFFC 62 #define IRDMA_CM_DEFAULT_RCV_WND_SCALE 2 63 #define IRDMA_CM_DEFAULT_FREE_PKTS 10 64 #define IRDMA_CM_FREE_PKT_LO_WATERMARK 2 65 #define IRDMA_CM_DEFAULT_MSS 536 66 #define IRDMA_CM_DEFAULT_MPA_VER 2 67 #define IRDMA_CM_DEFAULT_SEQ 0x159bf75f 68 #define IRDMA_CM_DEFAULT_LOCAL_ID 0x3b47 69 #define IRDMA_CM_DEFAULT_SEQ2 0x18ed5740 70 #define IRDMA_CM_DEFAULT_LOCAL_ID2 0xb807 71 #define IRDMA_MAX_CM_BUF (IRDMA_MAX_IETF_SIZE + IETF_MAX_PRIV_DATA_LEN) 72 73 enum ietf_mpa_flags { 74 IETF_MPA_FLAGS_REJECT = 0x20, 75 IETF_MPA_FLAGS_CRC = 0x40, 76 IETF_MPA_FLAGS_MARKERS = 0x80, 77 }; 78 79 enum irdma_timer_type { 80 IRDMA_TIMER_TYPE_SEND, 81 IRDMA_TIMER_TYPE_CLOSE, 82 }; 83 84 enum option_nums { 85 OPTION_NUM_EOL, 86 OPTION_NUM_NONE, 87 OPTION_NUM_MSS, 88 OPTION_NUM_WINDOW_SCALE, 89 OPTION_NUM_SACK_PERM, 90 OPTION_NUM_SACK, 91 OPTION_NUM_WRITE0 = 0xbc, 92 }; 93 94 /* cm node transition states */ 95 enum irdma_cm_node_state { 96 IRDMA_CM_STATE_UNKNOWN, 97 IRDMA_CM_STATE_INITED, 98 IRDMA_CM_STATE_LISTENING, 99 IRDMA_CM_STATE_SYN_RCVD, 100 IRDMA_CM_STATE_SYN_SENT, 101 IRDMA_CM_STATE_ONE_SIDE_ESTABLISHED, 102 IRDMA_CM_STATE_ESTABLISHED, 103 IRDMA_CM_STATE_ACCEPTING, 104 IRDMA_CM_STATE_MPAREQ_SENT, 105 IRDMA_CM_STATE_MPAREQ_RCVD, 106 IRDMA_CM_STATE_MPAREJ_RCVD, 107 IRDMA_CM_STATE_OFFLOADED, 108 IRDMA_CM_STATE_FIN_WAIT1, 109 IRDMA_CM_STATE_FIN_WAIT2, 110 IRDMA_CM_STATE_CLOSE_WAIT, 111 IRDMA_CM_STATE_TIME_WAIT, 112 IRDMA_CM_STATE_LAST_ACK, 113 IRDMA_CM_STATE_CLOSING, 114 IRDMA_CM_STATE_LISTENER_DESTROYED, 115 IRDMA_CM_STATE_CLOSED, 116 }; 117 118 enum mpa_frame_ver { 119 IETF_MPA_V1 = 1, 120 IETF_MPA_V2 = 2, 121 }; 122 123 enum mpa_frame_key { 124 MPA_KEY_REQUEST, 125 MPA_KEY_REPLY, 126 }; 127 128 enum send_rdma0 { 129 SEND_RDMA_READ_ZERO = 1, 130 SEND_RDMA_WRITE_ZERO = 2, 131 }; 132 133 enum irdma_tcpip_pkt_type { 134 IRDMA_PKT_TYPE_UNKNOWN, 135 IRDMA_PKT_TYPE_SYN, 136 IRDMA_PKT_TYPE_SYNACK, 137 IRDMA_PKT_TYPE_ACK, 138 IRDMA_PKT_TYPE_FIN, 139 IRDMA_PKT_TYPE_RST, 140 }; 141 142 enum irdma_cm_listener_state { 143 IRDMA_CM_LISTENER_PASSIVE_STATE = 1, 144 IRDMA_CM_LISTENER_ACTIVE_STATE = 2, 145 IRDMA_CM_LISTENER_EITHER_STATE = 3, 146 }; 147 148 /* CM event codes */ 149 enum irdma_cm_event_type { 150 IRDMA_CM_EVENT_UNKNOWN, 151 IRDMA_CM_EVENT_ESTABLISHED, 152 IRDMA_CM_EVENT_MPA_REQ, 153 IRDMA_CM_EVENT_MPA_CONNECT, 154 IRDMA_CM_EVENT_MPA_ACCEPT, 155 IRDMA_CM_EVENT_MPA_REJECT, 156 IRDMA_CM_EVENT_MPA_ESTABLISHED, 157 IRDMA_CM_EVENT_CONNECTED, 158 IRDMA_CM_EVENT_RESET, 159 IRDMA_CM_EVENT_ABORTED, 160 }; 161 162 struct ietf_mpa_v1 { 163 u8 key[IETF_MPA_KEY_SIZE]; 164 u8 flags; 165 u8 rev; 166 __be16 priv_data_len; 167 u8 priv_data[]; 168 }; 169 170 struct ietf_rtr_msg { 171 __be16 ctrl_ird; 172 __be16 ctrl_ord; 173 }; 174 175 struct ietf_mpa_v2 { 176 u8 key[IETF_MPA_KEY_SIZE]; 177 u8 flags; 178 u8 rev; 179 __be16 priv_data_len; 180 struct ietf_rtr_msg rtr_msg; 181 u8 priv_data[]; 182 }; 183 184 struct option_base { 185 u8 optionnum; 186 u8 len; 187 }; 188 189 struct option_mss { 190 u8 optionnum; 191 u8 len; 192 __be16 mss; 193 }; 194 195 struct option_windowscale { 196 u8 optionnum; 197 u8 len; 198 u8 shiftcount; 199 }; 200 201 union all_known_options { 202 char eol; 203 struct option_base base; 204 struct option_mss mss; 205 struct option_windowscale windowscale; 206 }; 207 208 struct irdma_timer_entry { 209 struct list_head list; 210 unsigned long timetosend; /* jiffies */ 211 struct irdma_puda_buf *sqbuf; 212 u32 type; 213 u32 retrycount; 214 u32 retranscount; 215 u32 context; 216 u32 send_retrans; 217 int close_when_complete; 218 }; 219 220 /* CM context params */ 221 struct irdma_cm_tcp_context { 222 u8 client; 223 u32 loc_seq_num; 224 u32 loc_ack_num; 225 u32 rem_ack_num; 226 u32 rcv_nxt; 227 u32 loc_id; 228 u32 rem_id; 229 u32 snd_wnd; 230 u32 max_snd_wnd; 231 u32 rcv_wnd; 232 u32 mss; 233 u8 snd_wscale; 234 u8 rcv_wscale; 235 }; 236 237 struct irdma_apbvt_entry { 238 struct hlist_node hlist; 239 u32 use_cnt; 240 u16 port; 241 }; 242 243 struct irdma_cm_listener { 244 struct list_head list; 245 struct iw_cm_id *cm_id; 246 struct irdma_cm_core *cm_core; 247 struct irdma_device *iwdev; 248 struct list_head child_listen_list; 249 struct irdma_apbvt_entry *apbvt_entry; 250 enum irdma_cm_listener_state listener_state; 251 refcount_t refcnt; 252 atomic_t pend_accepts_cnt; 253 u32 loc_addr[4]; 254 u32 reused_node; 255 int backlog; 256 u16 loc_port; 257 u16 vlan_id; 258 u8 loc_mac[ETH_ALEN]; 259 u8 user_pri; 260 u8 tos; 261 bool qhash_set:1; 262 bool ipv4:1; 263 }; 264 265 struct irdma_kmem_info { 266 void *addr; 267 u32 size; 268 }; 269 270 struct irdma_mpa_priv_info { 271 const void *addr; 272 u32 size; 273 }; 274 275 struct irdma_cm_node { 276 struct irdma_qp *iwqp; 277 struct irdma_device *iwdev; 278 struct irdma_sc_dev *dev; 279 struct irdma_cm_tcp_context tcp_cntxt; 280 struct irdma_cm_core *cm_core; 281 struct irdma_timer_entry *send_entry; 282 struct irdma_timer_entry *close_entry; 283 struct irdma_cm_listener *listener; 284 struct list_head timer_entry; 285 struct list_head reset_entry; 286 struct list_head teardown_entry; 287 struct irdma_apbvt_entry *apbvt_entry; 288 struct rcu_head rcu_head; 289 struct irdma_mpa_priv_info pdata; 290 struct irdma_sc_ah *ah; 291 union { 292 struct ietf_mpa_v1 mpa_frame; 293 struct ietf_mpa_v2 mpa_v2_frame; 294 }; 295 struct irdma_kmem_info mpa_hdr; 296 struct iw_cm_id *cm_id; 297 struct hlist_node list; 298 struct completion establish_comp; 299 spinlock_t retrans_list_lock; /* protect CM node rexmit updates*/ 300 atomic_t passive_state; 301 refcount_t refcnt; 302 enum irdma_cm_node_state state; 303 enum send_rdma0 send_rdma0_op; 304 enum mpa_frame_ver mpa_frame_rev; 305 u32 loc_addr[4], rem_addr[4]; 306 u16 loc_port, rem_port; 307 int apbvt_set; 308 int accept_pend; 309 u16 vlan_id; 310 u16 ird_size; 311 u16 ord_size; 312 u16 mpav2_ird_ord; 313 u16 lsmm_size; 314 u8 pdata_buf[IETF_MAX_PRIV_DATA_LEN]; 315 u8 loc_mac[ETH_ALEN]; 316 u8 rem_mac[ETH_ALEN]; 317 u8 user_pri; 318 u8 tos; 319 bool ack_rcvd:1; 320 bool qhash_set:1; 321 bool ipv4:1; 322 bool snd_mark_en:1; 323 bool rcv_mark_en:1; 324 bool do_lpb:1; 325 bool accelerated:1; 326 }; 327 328 /* Used by internal CM APIs to pass CM information*/ 329 struct irdma_cm_info { 330 struct iw_cm_id *cm_id; 331 u16 loc_port; 332 u16 rem_port; 333 u32 loc_addr[4]; 334 u32 rem_addr[4]; 335 u32 qh_qpid; 336 u16 vlan_id; 337 int backlog; 338 u8 user_pri; 339 u8 tos; 340 bool ipv4; 341 }; 342 343 struct irdma_cm_event { 344 enum irdma_cm_event_type type; 345 struct irdma_cm_info cm_info; 346 struct work_struct event_work; 347 struct irdma_cm_node *cm_node; 348 }; 349 350 struct irdma_cm_core { 351 struct irdma_device *iwdev; 352 struct irdma_sc_dev *dev; 353 struct list_head listen_list; 354 DECLARE_HASHTABLE(cm_hash_tbl, 8); 355 DECLARE_HASHTABLE(apbvt_hash_tbl, 8); 356 struct timer_list tcp_timer; 357 struct workqueue_struct *event_wq; 358 spinlock_t ht_lock; /* protect CM node (active side) list */ 359 spinlock_t listen_list_lock; /* protect listener list */ 360 spinlock_t apbvt_lock; /*serialize apbvt add/del entries*/ 361 u64 stats_nodes_created; 362 u64 stats_nodes_destroyed; 363 u64 stats_listen_created; 364 u64 stats_listen_destroyed; 365 u64 stats_listen_nodes_created; 366 u64 stats_listen_nodes_destroyed; 367 u64 stats_lpbs; 368 u64 stats_accepts; 369 u64 stats_rejects; 370 u64 stats_connect_errs; 371 u64 stats_passive_errs; 372 u64 stats_pkt_retrans; 373 u64 stats_backlog_drops; 374 struct irdma_puda_buf *(*form_cm_frame)(struct irdma_cm_node *cm_node, 375 struct irdma_kmem_info *options, 376 struct irdma_kmem_info *hdr, 377 struct irdma_mpa_priv_info *pdata, 378 u8 flags); 379 int (*cm_create_ah)(struct irdma_cm_node *cm_node, bool wait); 380 void (*cm_free_ah)(struct irdma_cm_node *cm_node); 381 }; 382 383 int irdma_schedule_cm_timer(struct irdma_cm_node *cm_node, 384 struct irdma_puda_buf *sqbuf, 385 enum irdma_timer_type type, int send_retrans, 386 int close_when_complete); 387 irdma_tos2dscp(u8 tos)388 static inline u8 irdma_tos2dscp(u8 tos) 389 { 390 #define IRDMA_DSCP_VAL GENMASK(7, 2) 391 return (u8)FIELD_GET(IRDMA_DSCP_VAL, tos); 392 } 393 394 int irdma_accept(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param); 395 int irdma_reject(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len); 396 int irdma_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param); 397 int irdma_create_listen(struct iw_cm_id *cm_id, int backlog); 398 int irdma_destroy_listen(struct iw_cm_id *cm_id); 399 int irdma_add_arp(struct irdma_pci_f *rf, u32 *ip, bool ipv4, const u8 *mac); 400 void irdma_cm_teardown_connections(struct irdma_device *iwdev, u32 *ipaddr, 401 struct irdma_cm_info *nfo, 402 bool disconnect_all); 403 int irdma_cm_start(struct irdma_device *dev); 404 int irdma_cm_stop(struct irdma_device *dev); 405 bool irdma_ipv4_is_lpb(u32 loc_addr, u32 rem_addr); 406 bool irdma_ipv6_is_lpb(u32 *loc_addr, u32 *rem_addr); 407 int irdma_arp_table(struct irdma_pci_f *rf, u32 *ip_addr, bool ipv4, 408 const u8 *mac_addr, u32 action); 409 void irdma_if_notify(struct irdma_device *iwdev, struct net_device *netdev, 410 u32 *ipaddr, bool ipv4, bool ifup); 411 bool irdma_port_in_use(struct irdma_cm_core *cm_core, u16 port); 412 void irdma_send_ack(struct irdma_cm_node *cm_node); 413 void irdma_lpb_nop(struct irdma_sc_qp *qp); 414 void irdma_rem_ref_cm_node(struct irdma_cm_node *cm_node); 415 void irdma_add_conn_est_qh(struct irdma_cm_node *cm_node); 416 #endif /* IRDMA_CM_H */ 417