drivers/infiniband/hw/nes/nes_cm.h

   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
  53 enum 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
  59 struct 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
  69 struct 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
  76 struct nes_cm_node;
  77 enum 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
  97 struct option_base {
  98         u8 optionnum;
  99         u8 length;
 100 };
 101
 102 enum 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
 112 struct option_mss {
 113         u8 optionnum;
 114         u8 length;
 115         __be16 mss;
 116 };
 117
 118 struct option_windowscale {
 119         u8 optionnum;
 120         u8 length;
 121         u8 shiftcount;
 122 };
 123
 124 union 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
 131 struct 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
 177 typedef u32 nes_addr_t;
 178
 179 #define nes_cm_tsa_context nes_qp_context
 180
 181 struct nes_qp;
 182
 183 /* cm node transition states */
 184 enum 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
 207 enum 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 */
 218 enum nes_cm_conn_type {
 219         NES_CM_IWARP_CONN_TYPE,
 220 };
 221
 222 /* CM context params */
 223 struct 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
 247 enum 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
 253 struct 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 */
 270 struct 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. */
 313 struct 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 */
 329 enum  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 */
 349 struct 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
 357 struct 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 */
 393 struct 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
 413 int schedule_nes_timer(struct nes_cm_node *, struct sk_buff *,
 414                 enum nes_timer_type, int, int);
 415
 416 int nes_accept(struct iw_cm_id *, struct iw_cm_conn_param *);
 417 int nes_reject(struct iw_cm_id *, const void *, u8);
 418 int nes_connect(struct iw_cm_id *, struct iw_cm_conn_param *);
 419 int nes_create_listen(struct iw_cm_id *, int);
 420 int nes_destroy_listen(struct iw_cm_id *);
 421
 422 int nes_cm_recv(struct sk_buff *, struct net_device *);
 423 int nes_cm_start(void);
 424 int nes_cm_stop(void);
 425
 426 #endif                  /* NES_CM_H */