1/* 2 * Copyright (c) 2006 - 2009 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 53enum ietf_mpa_flags { 54 IETF_MPA_FLAGS_MARKERS = 0x80, /* receive Markers */ 55 IETF_MPA_FLAGS_CRC = 0x40, /* receive Markers */ 56 IETF_MPA_FLAGS_REJECT = 0x20, /* Reject */ 57}; 58 59struct ietf_mpa_frame { 60 u8 key[IETF_MPA_KEY_SIZE]; 61 u8 flags; 62 u8 rev; 63 __be16 priv_data_len; 64 u8 priv_data[0]; 65}; 66 67#define ietf_mpa_req_resp_frame ietf_mpa_frame 68 69struct nes_v4_quad { 70 u32 rsvd0; 71 __le32 DstIpAdrIndex; /* Only most significant 5 bits are valid */ 72 __be32 SrcIpadr; 73 __be16 TcpPorts[2]; /* src is low, dest is high */ 74}; 75 76struct nes_cm_node; 77enum nes_timer_type { 78 NES_TIMER_TYPE_SEND, 79 NES_TIMER_TYPE_RECV, 80 NES_TIMER_NODE_CLEANUP, 81 NES_TIMER_TYPE_CLOSE, 82}; 83 84#define NES_PASSIVE_STATE_INDICATED 0 85#define NES_DO_NOT_SEND_RESET_EVENT 1 86#define NES_SEND_RESET_EVENT 2 87 88#define MAX_NES_IFS 4 89 90#define SET_ACK 1 91#define SET_SYN 2 92#define SET_FIN 4 93#define SET_RST 8 94 95#define TCP_OPTIONS_PADDING 3 96 97struct option_base { 98 u8 optionnum; 99 u8 length; 100}; 101 102enum option_numbers { 103 OPTION_NUMBER_END, 104 OPTION_NUMBER_NONE, 105 OPTION_NUMBER_MSS, 106 OPTION_NUMBER_WINDOW_SCALE, 107 OPTION_NUMBER_SACK_PERM, 108 OPTION_NUMBER_SACK, 109 OPTION_NUMBER_WRITE0 = 0xbc 110}; 111 112struct option_mss { 113 u8 optionnum; 114 u8 length; 115 __be16 mss; 116}; 117 118struct option_windowscale { 119 u8 optionnum; 120 u8 length; 121 u8 shiftcount; 122}; 123 124union all_known_options { 125 char as_end; 126 struct option_base as_base; 127 struct option_mss as_mss; 128 struct option_windowscale as_windowscale; 129}; 130 131struct nes_timer_entry { 132 struct list_head list; 133 unsigned long timetosend; /* jiffies */ 134 struct sk_buff *skb; 135 u32 type; 136 u32 retrycount; 137 u32 retranscount; 138 u32 context; 139 u32 seq_num; 140 u32 send_retrans; 141 int close_when_complete; 142 struct net_device *netdev; 143}; 144 145#define NES_DEFAULT_RETRYS 64 146#define NES_DEFAULT_RETRANS 8 147#ifdef CONFIG_INFINIBAND_NES_DEBUG 148#define NES_RETRY_TIMEOUT (1000*HZ/1000) 149#else 150#define NES_RETRY_TIMEOUT (3000*HZ/1000) 151#endif 152#define NES_SHORT_TIME (10) 153#define NES_LONG_TIME (2000*HZ/1000) 154#define NES_MAX_TIMEOUT ((unsigned long) (12*HZ)) 155 156#define NES_CM_HASHTABLE_SIZE 1024 157#define NES_CM_TCP_TIMER_INTERVAL 3000 158#define NES_CM_DEFAULT_MTU 1540 159#define NES_CM_DEFAULT_FRAME_CNT 10 160#define NES_CM_THREAD_STACK_SIZE 256 161#define NES_CM_DEFAULT_RCV_WND 64240 // before we know that window scaling is allowed 162#define NES_CM_DEFAULT_RCV_WND_SCALED 256960 // after we know that window scaling is allowed 163#define NES_CM_DEFAULT_RCV_WND_SCALE 2 164#define NES_CM_DEFAULT_FREE_PKTS 0x000A 165#define NES_CM_FREE_PKT_LO_WATERMARK 2 166 167#define NES_CM_DEFAULT_MSS 536 168 169#define NES_CM_DEF_SEQ 0x159bf75f 170#define NES_CM_DEF_LOCAL_ID 0x3b47 171 172#define NES_CM_DEF_SEQ2 0x18ed5740 173#define NES_CM_DEF_LOCAL_ID2 0xb807 174#define MAX_CM_BUFFER (IETF_MPA_FRAME_SIZE + IETF_MAX_PRIV_DATA_LEN) 175 176 177typedef u32 nes_addr_t; 178 179#define nes_cm_tsa_context nes_qp_context 180 181struct nes_qp; 182 183/* cm node transition states */ 184enum nes_cm_node_state { 185 NES_CM_STATE_UNKNOWN, 186 NES_CM_STATE_INITED, 187 NES_CM_STATE_LISTENING, 188 NES_CM_STATE_SYN_RCVD, 189 NES_CM_STATE_SYN_SENT, 190 NES_CM_STATE_ONE_SIDE_ESTABLISHED, 191 NES_CM_STATE_ESTABLISHED, 192 NES_CM_STATE_ACCEPTING, 193 NES_CM_STATE_MPAREQ_SENT, 194 NES_CM_STATE_MPAREQ_RCVD, 195 NES_CM_STATE_MPAREJ_RCVD, 196 NES_CM_STATE_TSA, 197 NES_CM_STATE_FIN_WAIT1, 198 NES_CM_STATE_FIN_WAIT2, 199 NES_CM_STATE_CLOSE_WAIT, 200 NES_CM_STATE_TIME_WAIT, 201 NES_CM_STATE_LAST_ACK, 202 NES_CM_STATE_CLOSING, 203 NES_CM_STATE_LISTENER_DESTROYED, 204 NES_CM_STATE_CLOSED 205}; 206 207enum nes_tcpip_pkt_type { 208 NES_PKT_TYPE_UNKNOWN, 209 NES_PKT_TYPE_SYN, 210 NES_PKT_TYPE_SYNACK, 211 NES_PKT_TYPE_ACK, 212 NES_PKT_TYPE_FIN, 213 NES_PKT_TYPE_RST 214}; 215 216 217/* type of nes connection */ 218enum nes_cm_conn_type { 219 NES_CM_IWARP_CONN_TYPE, 220}; 221 222/* CM context params */ 223struct nes_cm_tcp_context { 224 u8 client; 225 226 u32 loc_seq_num; 227 u32 loc_ack_num; 228 u32 rem_ack_num; 229 u32 rcv_nxt; 230 231 u32 loc_id; 232 u32 rem_id; 233 234 u32 snd_wnd; 235 u32 max_snd_wnd; 236 237 u32 rcv_wnd; 238 u32 mss; 239 u8 snd_wscale; 240 u8 rcv_wscale; 241 242 struct nes_cm_tsa_context tsa_cntxt; 243 struct timeval sent_ts; 244}; 245 246 247enum nes_cm_listener_state { 248 NES_CM_LISTENER_PASSIVE_STATE=1, 249 NES_CM_LISTENER_ACTIVE_STATE=2, 250 NES_CM_LISTENER_EITHER_STATE=3 251}; 252 253struct nes_cm_listener { 254 struct list_head list; 255 struct nes_cm_core *cm_core; 256 u8 loc_mac[ETH_ALEN]; 257 nes_addr_t loc_addr; 258 u16 loc_port; 259 struct iw_cm_id *cm_id; 260 enum nes_cm_conn_type conn_type; 261 atomic_t ref_count; 262 struct nes_vnic *nesvnic; 263 atomic_t pend_accepts_cnt; 264 int backlog; 265 enum nes_cm_listener_state listener_state; 266 u32 reused_node; 267}; 268 269/* per connection node and node state information */ 270struct nes_cm_node { 271 nes_addr_t loc_addr, rem_addr; 272 u16 loc_port, rem_port; 273 274 u8 loc_mac[ETH_ALEN]; 275 u8 rem_mac[ETH_ALEN]; 276 277 enum nes_cm_node_state state; 278 struct nes_cm_tcp_context tcp_cntxt; 279 struct nes_cm_core *cm_core; 280 struct sk_buff_head resend_list; 281 atomic_t ref_count; 282 struct net_device *netdev; 283 284 struct nes_cm_node *loopbackpartner; 285 286 struct nes_timer_entry *send_entry; 287 288 spinlock_t retrans_list_lock; 289 struct nes_timer_entry *recv_entry; 290 291 int send_write0; 292 union { 293 struct ietf_mpa_frame mpa_frame; 294 u8 mpa_frame_buf[MAX_CM_BUFFER]; 295 }; 296 u16 mpa_frame_size; 297 struct iw_cm_id *cm_id; 298 struct list_head list; 299 int accelerated; 300 struct nes_cm_listener *listener; 301 enum nes_cm_conn_type conn_type; 302 struct nes_vnic *nesvnic; 303 int apbvt_set; 304 int accept_pend; 305 struct list_head timer_entry; 306 struct list_head reset_entry; 307 struct nes_qp *nesqp; 308 atomic_t passive_state; 309}; 310 311/* structure for client or CM to fill when making CM api calls. */ 312/* - only need to set relevant data, based on op. */ 313struct nes_cm_info { 314 union { 315 struct iw_cm_id *cm_id; 316 struct net_device *netdev; 317 }; 318 319 u16 loc_port; 320 u16 rem_port; 321 nes_addr_t loc_addr; 322 nes_addr_t rem_addr; 323 324 enum nes_cm_conn_type conn_type; 325 int backlog; 326}; 327 328/* CM event codes */ 329enum nes_cm_event_type { 330 NES_CM_EVENT_UNKNOWN, 331 NES_CM_EVENT_ESTABLISHED, 332 NES_CM_EVENT_MPA_REQ, 333 NES_CM_EVENT_MPA_CONNECT, 334 NES_CM_EVENT_MPA_ACCEPT, 335 NES_CM_EVENT_MPA_REJECT, 336 NES_CM_EVENT_MPA_ESTABLISHED, 337 NES_CM_EVENT_CONNECTED, 338 NES_CM_EVENT_CLOSED, 339 NES_CM_EVENT_RESET, 340 NES_CM_EVENT_DROPPED_PKT, 341 NES_CM_EVENT_CLOSE_IMMED, 342 NES_CM_EVENT_CLOSE_HARD, 343 NES_CM_EVENT_CLOSE_CLEAN, 344 NES_CM_EVENT_ABORTED, 345 NES_CM_EVENT_SEND_FIRST 346}; 347 348/* event to post to CM event handler */ 349struct nes_cm_event { 350 enum nes_cm_event_type type; 351 352 struct nes_cm_info cm_info; 353 struct work_struct event_work; 354 struct nes_cm_node *cm_node; 355}; 356 357struct nes_cm_core { 358 enum nes_cm_node_state state; 359 360 atomic_t listen_node_cnt; 361 struct nes_cm_node listen_list; 362 spinlock_t listen_list_lock; 363 364 u32 mtu; 365 u32 free_tx_pkt_max; 366 u32 rx_pkt_posted; 367 atomic_t ht_node_cnt; 368 struct list_head connected_nodes; 369 /* struct list_head hashtable[NES_CM_HASHTABLE_SIZE]; */ 370 spinlock_t ht_lock; 371 372 struct timer_list tcp_timer; 373 374 struct nes_cm_ops *api; 375 376 int (*post_event)(struct nes_cm_event *event); 377 atomic_t events_posted; 378 struct workqueue_struct *event_wq; 379 struct workqueue_struct *disconn_wq; 380 381 atomic_t node_cnt; 382 u64 aborted_connects; 383 u32 options; 384 385 struct nes_cm_node *current_listen_node; 386}; 387 388 389#define NES_CM_SET_PKT_SIZE (1 << 1) 390#define NES_CM_SET_FREE_PKT_Q_SIZE (1 << 2) 391 392/* CM ops/API for client interface */ 393struct nes_cm_ops { 394 int (*accelerated)(struct nes_cm_core *, struct nes_cm_node *); 395 struct nes_cm_listener * (*listen)(struct nes_cm_core *, struct nes_vnic *, 396 struct nes_cm_info *); 397 int (*stop_listener)(struct nes_cm_core *, struct nes_cm_listener *); 398 struct nes_cm_node * (*connect)(struct nes_cm_core *, 399 struct nes_vnic *, u16, void *, 400 struct nes_cm_info *); 401 int (*close)(struct nes_cm_core *, struct nes_cm_node *); 402 int (*accept)(struct nes_cm_core *, struct ietf_mpa_frame *, 403 struct nes_cm_node *); 404 int (*reject)(struct nes_cm_core *, struct ietf_mpa_frame *, 405 struct nes_cm_node *); 406 int (*recv_pkt)(struct nes_cm_core *, struct nes_vnic *, 407 struct sk_buff *); 408 int (*destroy_cm_core)(struct nes_cm_core *); 409 int (*get)(struct nes_cm_core *); 410 int (*set)(struct nes_cm_core *, u32, u32); 411}; 412 413int schedule_nes_timer(struct nes_cm_node *, struct sk_buff *, 414 enum nes_timer_type, int, int); 415 416int nes_accept(struct iw_cm_id *, struct iw_cm_conn_param *); 417int nes_reject(struct iw_cm_id *, const void *, u8); 418int nes_connect(struct iw_cm_id *, struct iw_cm_conn_param *); 419int nes_create_listen(struct iw_cm_id *, int); 420int nes_destroy_listen(struct iw_cm_id *); 421 422int nes_cm_recv(struct sk_buff *, struct net_device *); 423int nes_cm_start(void); 424int nes_cm_stop(void); 425 426#endif /* NES_CM_H */ 427