kernel/2.6.29.6-aldebaran-rt/drivers/infiniband/hw/nes/nes_cm.h

   1 /*
   2  * Copyright (c) 2006 - 2008 NetEffect, Inc. 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 /* IETF MPA -- defines, enums, structs */
  43 #define IEFT_MPA_KEY_REQ  "MPA ID Req Frame"
  44 #define IEFT_MPA_KEY_REP  "MPA ID Rep Frame"
  45 #define IETF_MPA_KEY_SIZE 16
  46 #define IETF_MPA_VERSION  1
  47
  48 enum ietf_mpa_flags {
  49         IETF_MPA_FLAGS_MARKERS = 0x80,  /* receive Markers */
  50         IETF_MPA_FLAGS_CRC     = 0x40,  /* receive Markers */
  51         IETF_MPA_FLAGS_REJECT  = 0x20,  /* Reject */
  52 };
  53
  54 struct ietf_mpa_frame {
  55         u8 key[IETF_MPA_KEY_SIZE];
  56         u8 flags;
  57         u8 rev;
  58         __be16 priv_data_len;
  59         u8 priv_data[0];
  60 };
  61
  62 #define ietf_mpa_req_resp_frame ietf_mpa_frame
  63
  64 struct nes_v4_quad {
  65         u32 rsvd0;
  66         __le32 DstIpAdrIndex;   /* Only most significant 5 bits are valid */
  67         __be32 SrcIpadr;
  68         __be16 TcpPorts[2];             /* src is low, dest is high */
  69 };
  70
  71 struct nes_cm_node;
  72 enum nes_timer_type {
  73         NES_TIMER_TYPE_SEND,
  74         NES_TIMER_TYPE_RECV,
  75         NES_TIMER_NODE_CLEANUP,
  76         NES_TIMER_TYPE_CLOSE,
  77 };
  78
  79 #define NES_PASSIVE_STATE_INDICATED     0
  80 #define NES_DO_NOT_SEND_RESET_EVENT     1
  81 #define NES_SEND_RESET_EVENT            2
  82
  83 #define MAX_NES_IFS 4
  84
  85 #define SET_ACK 1
  86 #define SET_SYN 2
  87 #define SET_FIN 4
  88 #define SET_RST 8
  89
  90 #define TCP_OPTIONS_PADDING     3
  91
  92 struct option_base {
  93         u8 optionnum;
  94         u8 length;
  95 };
  96
  97 enum option_numbers {
  98         OPTION_NUMBER_END,
  99         OPTION_NUMBER_NONE,
 100         OPTION_NUMBER_MSS,
 101         OPTION_NUMBER_WINDOW_SCALE,
 102         OPTION_NUMBER_SACK_PERM,
 103         OPTION_NUMBER_SACK,
 104         OPTION_NUMBER_WRITE0 = 0xbc
 105 };
 106
 107 struct option_mss {
 108         u8 optionnum;
 109         u8 length;
 110         __be16 mss;
 111 };
 112
 113 struct option_windowscale {
 114         u8 optionnum;
 115         u8 length;
 116         u8 shiftcount;
 117 };
 118
 119 union all_known_options {
 120         char as_end;
 121         struct option_base as_base;
 122         struct option_mss as_mss;
 123         struct option_windowscale as_windowscale;
 124 };
 125
 126 struct nes_timer_entry {
 127         struct list_head list;
 128         unsigned long timetosend;       /* jiffies */
 129         struct sk_buff *skb;
 130         u32 type;
 131         u32 retrycount;
 132         u32 retranscount;
 133         u32 context;
 134         u32 seq_num;
 135         u32 send_retrans;
 136         int close_when_complete;
 137         struct net_device *netdev;
 138 };
 139
 140 #define NES_DEFAULT_RETRYS  64
 141 #define NES_DEFAULT_RETRANS 8
 142 #ifdef CONFIG_INFINIBAND_NES_DEBUG
 143 #define NES_RETRY_TIMEOUT   (1000*HZ/1000)
 144 #else
 145 #define NES_RETRY_TIMEOUT   (3000*HZ/1000)
 146 #endif
 147 #define NES_SHORT_TIME      (10)
 148 #define NES_LONG_TIME       (2000*HZ/1000)
 149
 150 #define NES_CM_HASHTABLE_SIZE         1024
 151 #define NES_CM_TCP_TIMER_INTERVAL     3000
 152 #define NES_CM_DEFAULT_MTU            1540
 153 #define NES_CM_DEFAULT_FRAME_CNT      10
 154 #define NES_CM_THREAD_STACK_SIZE      256
 155 #define NES_CM_DEFAULT_RCV_WND        64240     // before we know that window scaling is allowed
 156 #define NES_CM_DEFAULT_RCV_WND_SCALED 256960  // after we know that window scaling is allowed
 157 #define NES_CM_DEFAULT_RCV_WND_SCALE  2
 158 #define NES_CM_DEFAULT_FREE_PKTS      0x000A
 159 #define NES_CM_FREE_PKT_LO_WATERMARK  2
 160
 161 #define NES_CM_DEFAULT_MSS   536
 162
 163 #define NES_CM_DEF_SEQ       0x159bf75f
 164 #define NES_CM_DEF_LOCAL_ID  0x3b47
 165
 166 #define NES_CM_DEF_SEQ2      0x18ed5740
 167 #define NES_CM_DEF_LOCAL_ID2 0xb807
 168 #define MAX_CM_BUFFER   512
 169
 170
 171 typedef u32 nes_addr_t;
 172
 173 #define nes_cm_tsa_context nes_qp_context
 174
 175 struct nes_qp;
 176
 177 /* cm node transition states */
 178 enum nes_cm_node_state {
 179         NES_CM_STATE_UNKNOWN,
 180         NES_CM_STATE_INITED,
 181         NES_CM_STATE_LISTENING,
 182         NES_CM_STATE_SYN_RCVD,
 183         NES_CM_STATE_SYN_SENT,
 184         NES_CM_STATE_ONE_SIDE_ESTABLISHED,
 185         NES_CM_STATE_ESTABLISHED,
 186         NES_CM_STATE_ACCEPTING,
 187         NES_CM_STATE_MPAREQ_SENT,
 188         NES_CM_STATE_MPAREQ_RCVD,
 189         NES_CM_STATE_TSA,
 190         NES_CM_STATE_FIN_WAIT1,
 191         NES_CM_STATE_FIN_WAIT2,
 192         NES_CM_STATE_CLOSE_WAIT,
 193         NES_CM_STATE_TIME_WAIT,
 194         NES_CM_STATE_LAST_ACK,
 195         NES_CM_STATE_CLOSING,
 196         NES_CM_STATE_CLOSED
 197 };
 198
 199 enum nes_tcpip_pkt_type {
 200         NES_PKT_TYPE_UNKNOWN,
 201         NES_PKT_TYPE_SYN,
 202         NES_PKT_TYPE_SYNACK,
 203         NES_PKT_TYPE_ACK,
 204         NES_PKT_TYPE_FIN,
 205         NES_PKT_TYPE_RST
 206 };
 207
 208
 209 /* type of nes connection */
 210 enum nes_cm_conn_type {
 211         NES_CM_IWARP_CONN_TYPE,
 212 };
 213
 214 /* CM context params */
 215 struct nes_cm_tcp_context {
 216         u8  client;
 217
 218         u32 loc_seq_num;
 219         u32 loc_ack_num;
 220         u32 rem_ack_num;
 221         u32 rcv_nxt;
 222
 223         u32 loc_id;
 224         u32 rem_id;
 225
 226         u32 snd_wnd;
 227         u32 max_snd_wnd;
 228
 229         u32 rcv_wnd;
 230         u32 mss;
 231         u8  snd_wscale;
 232         u8  rcv_wscale;
 233
 234         struct nes_cm_tsa_context tsa_cntxt;
 235         struct timeval            sent_ts;
 236 };
 237
 238
 239 enum nes_cm_listener_state {
 240         NES_CM_LISTENER_PASSIVE_STATE=1,
 241         NES_CM_LISTENER_ACTIVE_STATE=2,
 242         NES_CM_LISTENER_EITHER_STATE=3
 243 };
 244
 245 struct nes_cm_listener {
 246         struct list_head           list;
 247         struct nes_cm_core         *cm_core;
 248         u8                         loc_mac[ETH_ALEN];
 249         nes_addr_t                 loc_addr;
 250         u16                        loc_port;
 251         struct iw_cm_id            *cm_id;
 252         enum nes_cm_conn_type      conn_type;
 253         atomic_t                   ref_count;
 254         struct nes_vnic            *nesvnic;
 255         atomic_t                   pend_accepts_cnt;
 256         int                        backlog;
 257         enum nes_cm_listener_state listener_state;
 258         u32                        reused_node;
 259 };
 260
 261 /* per connection node and node state information */
 262 struct nes_cm_node {
 263         nes_addr_t                loc_addr, rem_addr;
 264         u16                       loc_port, rem_port;
 265
 266         u8                        loc_mac[ETH_ALEN];
 267         u8                        rem_mac[ETH_ALEN];
 268
 269         enum nes_cm_node_state    state;
 270         struct nes_cm_tcp_context tcp_cntxt;
 271         struct nes_cm_core        *cm_core;
 272         struct sk_buff_head       resend_list;
 273         atomic_t                  ref_count;
 274         struct net_device         *netdev;
 275
 276         struct nes_cm_node        *loopbackpartner;
 277
 278         struct nes_timer_entry  *send_entry;
 279
 280         spinlock_t                retrans_list_lock;
 281         struct list_head          recv_list;
 282         spinlock_t                recv_list_lock;
 283
 284         int                       send_write0;
 285         union {
 286                 struct ietf_mpa_frame mpa_frame;
 287                 u8                    mpa_frame_buf[NES_CM_DEFAULT_MTU];
 288         };
 289         u16                       mpa_frame_size;
 290         struct iw_cm_id           *cm_id;
 291         struct list_head          list;
 292         int                       accelerated;
 293         struct nes_cm_listener    *listener;
 294         enum nes_cm_conn_type     conn_type;
 295         struct nes_vnic           *nesvnic;
 296         int                       apbvt_set;
 297         int                       accept_pend;
 298         int                     freed;
 299         struct list_head        timer_entry;
 300         struct list_head        reset_entry;
 301         struct nes_qp           *nesqp;
 302         atomic_t                passive_state;
 303 };
 304
 305 /* structure for client or CM to fill when making CM api calls. */
 306 /*      - only need to set relevant data, based on op. */
 307 struct nes_cm_info {
 308         union {
 309                 struct iw_cm_id   *cm_id;
 310                 struct net_device *netdev;
 311         };
 312
 313         u16 loc_port;
 314         u16 rem_port;
 315         nes_addr_t loc_addr;
 316         nes_addr_t rem_addr;
 317
 318         enum nes_cm_conn_type  conn_type;
 319         int backlog;
 320 };
 321
 322 /* CM event codes */
 323 enum  nes_cm_event_type {
 324         NES_CM_EVENT_UNKNOWN,
 325         NES_CM_EVENT_ESTABLISHED,
 326         NES_CM_EVENT_MPA_REQ,
 327         NES_CM_EVENT_MPA_CONNECT,
 328         NES_CM_EVENT_MPA_ACCEPT,
 329         NES_CM_EVENT_MPA_ESTABLISHED,
 330         NES_CM_EVENT_CONNECTED,
 331         NES_CM_EVENT_CLOSED,
 332         NES_CM_EVENT_RESET,
 333         NES_CM_EVENT_DROPPED_PKT,
 334         NES_CM_EVENT_CLOSE_IMMED,
 335         NES_CM_EVENT_CLOSE_HARD,
 336         NES_CM_EVENT_CLOSE_CLEAN,
 337         NES_CM_EVENT_ABORTED,
 338         NES_CM_EVENT_SEND_FIRST
 339 };
 340
 341 /* event to post to CM event handler */
 342 struct nes_cm_event {
 343         enum nes_cm_event_type type;
 344
 345         struct nes_cm_info cm_info;
 346         struct work_struct event_work;
 347         struct nes_cm_node *cm_node;
 348 };
 349
 350 struct nes_cm_core {
 351         enum nes_cm_node_state  state;
 352
 353         atomic_t                listen_node_cnt;
 354         struct nes_cm_node      listen_list;
 355         spinlock_t              listen_list_lock;
 356
 357         u32                     mtu;
 358         u32                     free_tx_pkt_max;
 359         u32                     rx_pkt_posted;
 360         atomic_t                ht_node_cnt;
 361         struct list_head        connected_nodes;
 362         /* struct list_head hashtable[NES_CM_HASHTABLE_SIZE]; */
 363         spinlock_t              ht_lock;
 364
 365         struct timer_list       tcp_timer;
 366
 367         struct nes_cm_ops       *api;
 368
 369         int (*post_event)(struct nes_cm_event *event);
 370         atomic_t                events_posted;
 371         struct workqueue_struct *event_wq;
 372         struct workqueue_struct *disconn_wq;
 373
 374         atomic_t                node_cnt;
 375         u64                     aborted_connects;
 376         u32                     options;
 377
 378         struct nes_cm_node      *current_listen_node;
 379 };
 380
 381
 382 #define NES_CM_SET_PKT_SIZE        (1 << 1)
 383 #define NES_CM_SET_FREE_PKT_Q_SIZE (1 << 2)
 384
 385 /* CM ops/API for client interface */
 386 struct nes_cm_ops {
 387         int (*accelerated)(struct nes_cm_core *, struct nes_cm_node *);
 388         struct nes_cm_listener * (*listen)(struct nes_cm_core *, struct nes_vnic *,
 389                         struct nes_cm_info *);
 390         int (*stop_listener)(struct nes_cm_core *, struct nes_cm_listener *);
 391         struct nes_cm_node * (*connect)(struct nes_cm_core *,
 392                         struct nes_vnic *, u16, void *,
 393                         struct nes_cm_info *);
 394         int (*close)(struct nes_cm_core *, struct nes_cm_node *);
 395         int (*accept)(struct nes_cm_core *, struct ietf_mpa_frame *,
 396                         struct nes_cm_node *);
 397         int (*reject)(struct nes_cm_core *, struct ietf_mpa_frame *,
 398                         struct nes_cm_node *);
 399         int (*recv_pkt)(struct nes_cm_core *, struct nes_vnic *,
 400                         struct sk_buff *);
 401         int (*destroy_cm_core)(struct nes_cm_core *);
 402         int (*get)(struct nes_cm_core *);
 403         int (*set)(struct nes_cm_core *, u32, u32);
 404 };
 405
 406 int schedule_nes_timer(struct nes_cm_node *, struct sk_buff *,
 407                 enum nes_timer_type, int, int);
 408
 409 int nes_cm_disconn(struct nes_qp *);
 410
 411 int nes_accept(struct iw_cm_id *, struct iw_cm_conn_param *);
 412 int nes_reject(struct iw_cm_id *, const void *, u8);
 413 int nes_connect(struct iw_cm_id *, struct iw_cm_conn_param *);
 414 int nes_create_listen(struct iw_cm_id *, int);
 415 int nes_destroy_listen(struct iw_cm_id *);
 416
 417 int nes_cm_recv(struct sk_buff *, struct net_device *);
 418 int nes_cm_start(void);
 419 int nes_cm_stop(void);
 420
 421 #endif                  /* NES_CM_H */