1/* 2 * Copyright (c) 2006 - 2014 Intel Corporation. All rights reserved. 3 * 4 * This software is available to you under a choice of one of two 5 * licenses. You may choose to be licensed under the terms of the GNU 6 * General Public License (GPL) Version 2, available from the file 7 * COPYING in the main directory of this source tree, or the 8 * OpenIB.org BSD license below: 9 * 10 * Redistribution and use in source and binary forms, with or 11 * without modification, are permitted provided that the following 12 * conditions are met: 13 * 14 * - Redistributions of source code must retain the above 15 * copyright notice, this list of conditions and the following 16 * disclaimer. 17 * 18 * - Redistributions in binary form must reproduce the above 19 * copyright notice, this list of conditions and the following 20 * disclaimer in the documentation and/or other materials 21 * provided with the distribution. 22 * 23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 30 * SOFTWARE. 31 * 32 */ 33 34#ifndef NES_CM_H 35#define NES_CM_H 36 37#define QUEUE_EVENTS 38 39#define NES_MANAGE_APBVT_DEL 0 40#define NES_MANAGE_APBVT_ADD 1 41 42#define NES_MPA_REQUEST_ACCEPT 1 43#define NES_MPA_REQUEST_REJECT 2 44 45/* IETF MPA -- defines, enums, structs */ 46#define IEFT_MPA_KEY_REQ "MPA ID Req Frame" 47#define IEFT_MPA_KEY_REP "MPA ID Rep Frame" 48#define IETF_MPA_KEY_SIZE 16 49#define IETF_MPA_VERSION 1 50#define IETF_MAX_PRIV_DATA_LEN 512 51#define IETF_MPA_FRAME_SIZE 20 52#define IETF_RTR_MSG_SIZE 4 53#define IETF_MPA_V2_FLAG 0x10 54 55/* IETF RTR MSG Fields */ 56#define IETF_PEER_TO_PEER 0x8000 57#define IETF_FLPDU_ZERO_LEN 0x4000 58#define IETF_RDMA0_WRITE 0x8000 59#define IETF_RDMA0_READ 0x4000 60#define IETF_NO_IRD_ORD 0x3FFF 61#define NES_MAX_IRD 0x40 62#define NES_MAX_ORD 0x7F 63 64enum ietf_mpa_flags { 65 IETF_MPA_FLAGS_MARKERS = 0x80, /* receive Markers */ 66 IETF_MPA_FLAGS_CRC = 0x40, /* receive Markers */ 67 IETF_MPA_FLAGS_REJECT = 0x20, /* Reject */ 68}; 69 70struct ietf_mpa_v1 { 71 u8 key[IETF_MPA_KEY_SIZE]; 72 u8 flags; 73 u8 rev; 74 __be16 priv_data_len; 75 u8 priv_data[0]; 76}; 77 78#define ietf_mpa_req_resp_frame ietf_mpa_frame 79 80struct ietf_rtr_msg { 81 __be16 ctrl_ird; 82 __be16 ctrl_ord; 83}; 84 85struct ietf_mpa_v2 { 86 u8 key[IETF_MPA_KEY_SIZE]; 87 u8 flags; 88 u8 rev; 89 __be16 priv_data_len; 90 struct ietf_rtr_msg rtr_msg; 91 u8 priv_data[0]; 92}; 93 94struct nes_v4_quad { 95 u32 rsvd0; 96 __le32 DstIpAdrIndex; /* Only most significant 5 bits are valid */ 97 __be32 SrcIpadr; 98 __be16 TcpPorts[2]; /* src is low, dest is high */ 99}; 100 101struct nes_cm_node; 102enum nes_timer_type { 103 NES_TIMER_TYPE_SEND, 104 NES_TIMER_TYPE_RECV, 105 NES_TIMER_NODE_CLEANUP, 106 NES_TIMER_TYPE_CLOSE, 107}; 108 109#define NES_PASSIVE_STATE_INDICATED 0 110#define NES_DO_NOT_SEND_RESET_EVENT 1 111#define NES_SEND_RESET_EVENT 2 112 113#define MAX_NES_IFS 4 114 115#define SET_ACK 1 116#define SET_SYN 2 117#define SET_FIN 4 118#define SET_RST 8 119 120#define TCP_OPTIONS_PADDING 3 121 122struct option_base { 123 u8 optionnum; 124 u8 length; 125}; 126 127enum option_numbers { 128 OPTION_NUMBER_END, 129 OPTION_NUMBER_NONE, 130 OPTION_NUMBER_MSS, 131 OPTION_NUMBER_WINDOW_SCALE, 132 OPTION_NUMBER_SACK_PERM, 133 OPTION_NUMBER_SACK, 134 OPTION_NUMBER_WRITE0 = 0xbc 135}; 136 137struct option_mss { 138 u8 optionnum; 139 u8 length; 140 __be16 mss; 141}; 142 143struct option_windowscale { 144 u8 optionnum; 145 u8 length; 146 u8 shiftcount; 147}; 148 149union all_known_options { 150 char as_end; 151 struct option_base as_base; 152 struct option_mss as_mss; 153 struct option_windowscale as_windowscale; 154}; 155 156struct nes_timer_entry { 157 struct list_head list; 158 unsigned long timetosend; /* jiffies */ 159 struct sk_buff *skb; 160 u32 type; 161 u32 retrycount; 162 u32 retranscount; 163 u32 context; 164 u32 seq_num; 165 u32 send_retrans; 166 int close_when_complete; 167 struct net_device *netdev; 168}; 169 170#define NES_DEFAULT_RETRYS 64 171#define NES_DEFAULT_RETRANS 8 172#ifdef CONFIG_INFINIBAND_NES_DEBUG 173#define NES_RETRY_TIMEOUT (1000*HZ/1000) 174#else 175#define NES_RETRY_TIMEOUT (3000*HZ/1000) 176#endif 177#define NES_SHORT_TIME (10) 178#define NES_LONG_TIME (2000*HZ/1000) 179#define NES_MAX_TIMEOUT ((unsigned long) (12*HZ)) 180 181#define NES_CM_HASHTABLE_SIZE 1024 182#define NES_CM_TCP_TIMER_INTERVAL 3000 183#define NES_CM_DEFAULT_MTU 1540 184#define NES_CM_DEFAULT_FRAME_CNT 10 185#define NES_CM_THREAD_STACK_SIZE 256 186#define NES_CM_DEFAULT_RCV_WND 64240 // before we know that window scaling is allowed 187#define NES_CM_DEFAULT_RCV_WND_SCALED 256960 // after we know that window scaling is allowed 188#define NES_CM_DEFAULT_RCV_WND_SCALE 2 189#define NES_CM_DEFAULT_FREE_PKTS 0x000A 190#define NES_CM_FREE_PKT_LO_WATERMARK 2 191 192#define NES_CM_DEFAULT_MSS 536 193 194#define NES_CM_DEF_SEQ 0x159bf75f 195#define NES_CM_DEF_LOCAL_ID 0x3b47 196 197#define NES_CM_DEF_SEQ2 0x18ed5740 198#define NES_CM_DEF_LOCAL_ID2 0xb807 199#define MAX_CM_BUFFER (IETF_MPA_FRAME_SIZE + IETF_RTR_MSG_SIZE + IETF_MAX_PRIV_DATA_LEN) 200 201typedef u32 nes_addr_t; 202 203#define nes_cm_tsa_context nes_qp_context 204 205struct nes_qp; 206 207/* cm node transition states */ 208enum nes_cm_node_state { 209 NES_CM_STATE_UNKNOWN, 210 NES_CM_STATE_INITED, 211 NES_CM_STATE_LISTENING, 212 NES_CM_STATE_SYN_RCVD, 213 NES_CM_STATE_SYN_SENT, 214 NES_CM_STATE_ONE_SIDE_ESTABLISHED, 215 NES_CM_STATE_ESTABLISHED, 216 NES_CM_STATE_ACCEPTING, 217 NES_CM_STATE_MPAREQ_SENT, 218 NES_CM_STATE_MPAREQ_RCVD, 219 NES_CM_STATE_MPAREJ_RCVD, 220 NES_CM_STATE_TSA, 221 NES_CM_STATE_FIN_WAIT1, 222 NES_CM_STATE_FIN_WAIT2, 223 NES_CM_STATE_CLOSE_WAIT, 224 NES_CM_STATE_TIME_WAIT, 225 NES_CM_STATE_LAST_ACK, 226 NES_CM_STATE_CLOSING, 227 NES_CM_STATE_LISTENER_DESTROYED, 228 NES_CM_STATE_CLOSED 229}; 230 231enum mpa_frame_version { 232 IETF_MPA_V1 = 1, 233 IETF_MPA_V2 = 2 234}; 235 236enum mpa_frame_key { 237 MPA_KEY_REQUEST, 238 MPA_KEY_REPLY 239}; 240 241enum send_rdma0 { 242 SEND_RDMA_READ_ZERO = 1, 243 SEND_RDMA_WRITE_ZERO = 2 244}; 245 246enum nes_tcpip_pkt_type { 247 NES_PKT_TYPE_UNKNOWN, 248 NES_PKT_TYPE_SYN, 249 NES_PKT_TYPE_SYNACK, 250 NES_PKT_TYPE_ACK, 251 NES_PKT_TYPE_FIN, 252 NES_PKT_TYPE_RST 253}; 254 255 256/* type of nes connection */ 257enum nes_cm_conn_type { 258 NES_CM_IWARP_CONN_TYPE, 259}; 260 261/* CM context params */ 262struct nes_cm_tcp_context { 263 u8 client; 264 265 u32 loc_seq_num; 266 u32 loc_ack_num; 267 u32 rem_ack_num; 268 u32 rcv_nxt; 269 270 u32 loc_id; 271 u32 rem_id; 272 273 u32 snd_wnd; 274 u32 max_snd_wnd; 275 276 u32 rcv_wnd; 277 u32 mss; 278 u8 snd_wscale; 279 u8 rcv_wscale; 280 281 struct nes_cm_tsa_context tsa_cntxt; 282 struct timeval sent_ts; 283}; 284 285 286enum nes_cm_listener_state { 287 NES_CM_LISTENER_PASSIVE_STATE = 1, 288 NES_CM_LISTENER_ACTIVE_STATE = 2, 289 NES_CM_LISTENER_EITHER_STATE = 3 290}; 291 292struct nes_cm_listener { 293 struct list_head list; 294 struct nes_cm_core *cm_core; 295 u8 loc_mac[ETH_ALEN]; 296 nes_addr_t loc_addr, mapped_loc_addr; 297 u16 loc_port, mapped_loc_port; 298 struct iw_cm_id *cm_id; 299 enum nes_cm_conn_type conn_type; 300 atomic_t ref_count; 301 struct nes_vnic *nesvnic; 302 atomic_t pend_accepts_cnt; 303 int backlog; 304 enum nes_cm_listener_state listener_state; 305 u32 reused_node; 306}; 307 308/* per connection node and node state information */ 309struct nes_cm_node { 310 nes_addr_t loc_addr, rem_addr; 311 nes_addr_t mapped_loc_addr, mapped_rem_addr; 312 u16 loc_port, rem_port; 313 u16 mapped_loc_port, mapped_rem_port; 314 315 u8 loc_mac[ETH_ALEN]; 316 u8 rem_mac[ETH_ALEN]; 317 318 enum nes_cm_node_state state; 319 struct nes_cm_tcp_context tcp_cntxt; 320 struct nes_cm_core *cm_core; 321 struct sk_buff_head resend_list; 322 atomic_t ref_count; 323 struct net_device *netdev; 324 325 struct nes_cm_node *loopbackpartner; 326 327 struct nes_timer_entry *send_entry; 328 struct nes_timer_entry *recv_entry; 329 spinlock_t retrans_list_lock; 330 enum send_rdma0 send_rdma0_op; 331 332 union { 333 struct ietf_mpa_v1 mpa_frame; 334 struct ietf_mpa_v2 mpa_v2_frame; 335 u8 mpa_frame_buf[MAX_CM_BUFFER]; 336 }; 337 enum mpa_frame_version mpa_frame_rev; 338 u16 ird_size; 339 u16 ord_size; 340 u16 mpav2_ird_ord; 341 342 u16 mpa_frame_size; 343 struct iw_cm_id *cm_id; 344 struct list_head list; 345 int accelerated; 346 struct nes_cm_listener *listener; 347 enum nes_cm_conn_type conn_type; 348 struct nes_vnic *nesvnic; 349 int apbvt_set; 350 int accept_pend; 351 struct list_head timer_entry; 352 struct list_head reset_entry; 353 struct nes_qp *nesqp; 354 atomic_t passive_state; 355}; 356 357/* structure for client or CM to fill when making CM api calls. */ 358/* - only need to set relevant data, based on op. */ 359struct nes_cm_info { 360 union { 361 struct iw_cm_id *cm_id; 362 struct net_device *netdev; 363 }; 364 365 u16 loc_port; 366 u16 rem_port; 367 nes_addr_t loc_addr; 368 nes_addr_t rem_addr; 369 u16 mapped_loc_port; 370 u16 mapped_rem_port; 371 nes_addr_t mapped_loc_addr; 372 nes_addr_t mapped_rem_addr; 373 374 enum nes_cm_conn_type conn_type; 375 int backlog; 376}; 377 378/* CM event codes */ 379enum nes_cm_event_type { 380 NES_CM_EVENT_UNKNOWN, 381 NES_CM_EVENT_ESTABLISHED, 382 NES_CM_EVENT_MPA_REQ, 383 NES_CM_EVENT_MPA_CONNECT, 384 NES_CM_EVENT_MPA_ACCEPT, 385 NES_CM_EVENT_MPA_REJECT, 386 NES_CM_EVENT_MPA_ESTABLISHED, 387 NES_CM_EVENT_CONNECTED, 388 NES_CM_EVENT_CLOSED, 389 NES_CM_EVENT_RESET, 390 NES_CM_EVENT_DROPPED_PKT, 391 NES_CM_EVENT_CLOSE_IMMED, 392 NES_CM_EVENT_CLOSE_HARD, 393 NES_CM_EVENT_CLOSE_CLEAN, 394 NES_CM_EVENT_ABORTED, 395 NES_CM_EVENT_SEND_FIRST 396}; 397 398/* event to post to CM event handler */ 399struct nes_cm_event { 400 enum nes_cm_event_type type; 401 402 struct nes_cm_info cm_info; 403 struct work_struct event_work; 404 struct nes_cm_node *cm_node; 405}; 406 407struct nes_cm_core { 408 enum nes_cm_node_state state; 409 410 atomic_t listen_node_cnt; 411 struct nes_cm_node listen_list; 412 spinlock_t listen_list_lock; 413 414 u32 mtu; 415 u32 free_tx_pkt_max; 416 u32 rx_pkt_posted; 417 atomic_t ht_node_cnt; 418 struct list_head connected_nodes; 419 /* struct list_head hashtable[NES_CM_HASHTABLE_SIZE]; */ 420 spinlock_t ht_lock; 421 422 struct timer_list tcp_timer; 423 424 struct nes_cm_ops *api; 425 426 int (*post_event)(struct nes_cm_event *event); 427 atomic_t events_posted; 428 struct workqueue_struct *event_wq; 429 struct workqueue_struct *disconn_wq; 430 431 atomic_t node_cnt; 432 u64 aborted_connects; 433 u32 options; 434 435 struct nes_cm_node *current_listen_node; 436}; 437 438 439#define NES_CM_SET_PKT_SIZE (1 << 1) 440#define NES_CM_SET_FREE_PKT_Q_SIZE (1 << 2) 441 442/* CM ops/API for client interface */ 443struct nes_cm_ops { 444 int (*accelerated)(struct nes_cm_core *, struct nes_cm_node *); 445 struct nes_cm_listener * (*listen)(struct nes_cm_core *, struct nes_vnic *, 446 struct nes_cm_info *); 447 int (*stop_listener)(struct nes_cm_core *, struct nes_cm_listener *); 448 struct nes_cm_node * (*connect)(struct nes_cm_core *, 449 struct nes_vnic *, u16, void *, 450 struct nes_cm_info *); 451 int (*close)(struct nes_cm_core *, struct nes_cm_node *); 452 int (*accept)(struct nes_cm_core *, struct nes_cm_node *); 453 int (*reject)(struct nes_cm_core *, struct nes_cm_node *); 454 int (*recv_pkt)(struct nes_cm_core *, struct nes_vnic *, 455 struct sk_buff *); 456 int (*destroy_cm_core)(struct nes_cm_core *); 457 int (*get)(struct nes_cm_core *); 458 int (*set)(struct nes_cm_core *, u32, u32); 459}; 460 461int schedule_nes_timer(struct nes_cm_node *, struct sk_buff *, 462 enum nes_timer_type, int, int); 463 464int nes_accept(struct iw_cm_id *, struct iw_cm_conn_param *); 465int nes_reject(struct iw_cm_id *, const void *, u8); 466int nes_connect(struct iw_cm_id *, struct iw_cm_conn_param *); 467int nes_create_listen(struct iw_cm_id *, int); 468int nes_destroy_listen(struct iw_cm_id *); 469 470int nes_cm_recv(struct sk_buff *, struct net_device *); 471int nes_cm_start(void); 472int nes_cm_stop(void); 473int nes_add_ref_cm_node(struct nes_cm_node *cm_node); 474int nes_rem_ref_cm_node(struct nes_cm_node *cm_node); 475 476#endif /* NES_CM_H */ 477