kernel/drivers/net/fddi/skfp/rmt.c

   1 /******************************************************************************
   2  *
   3  *      (C)Copyright 1998,1999 SysKonnect,
   4  *      a business unit of Schneider & Koch & Co. Datensysteme GmbH.
   5  *
   6  *      See the file "skfddi.c" for further information.
   7  *
   8  *      This program is free software; you can redistribute it and/or modify
   9  *      it under the terms of the GNU General Public License as published by
  10  *      the Free Software Foundation; either version 2 of the License, or
  11  *      (at your option) any later version.
  12  *
  13  *      The information in this file is provided "AS IS" without warranty.
  14  *
  15  ******************************************************************************/
  16
  17 /*
  18         SMT RMT
  19         Ring Management
  20 */
  21
  22 /*
  23  * Hardware independent state machine implemantation
  24  * The following external SMT functions are referenced :
  25  *
  26  *              queue_event()
  27  *              smt_timer_start()
  28  *              smt_timer_stop()
  29  *
  30  *      The following external HW dependent functions are referenced :
  31  *              sm_ma_control()
  32  *              sm_mac_check_beacon_claim()
  33  *
  34  *      The following HW dependent events are required :
  35  *              RM_RING_OP
  36  *              RM_RING_NON_OP
  37  *              RM_MY_BEACON
  38  *              RM_OTHER_BEACON
  39  *              RM_MY_CLAIM
  40  *              RM_TRT_EXP
  41  *              RM_VALID_CLAIM
  42  *
  43  */
  44
  45 #include "h/types.h"
  46 #include "h/fddi.h"
  47 #include "h/smc.h"
  48
  49 #define KERNEL
  50 #include "h/smtstate.h"
  51
  52 #ifndef lint
  53 static const char ID_sccs[] = "@(#)rmt.c        2.13 99/07/02 (C) SK " ;
  54 #endif
  55
  56 /*
  57  * FSM Macros
  58  */
  59 #define AFLAG   0x10
  60 #define GO_STATE(x)     (smc->mib.m[MAC0].fddiMACRMTState = (x)|AFLAG)
  61 #define ACTIONS_DONE()  (smc->mib.m[MAC0].fddiMACRMTState &= ~AFLAG)
  62 #define ACTIONS(x)      (x|AFLAG)
  63
  64 #define RM0_ISOLATED    0
  65 #define RM1_NON_OP      1               /* not operational */
  66 #define RM2_RING_OP     2               /* ring operational */
  67 #define RM3_DETECT      3               /* detect dupl addresses */
  68 #define RM4_NON_OP_DUP  4               /* dupl. addr detected */
  69 #define RM5_RING_OP_DUP 5               /* ring oper. with dupl. addr */
  70 #define RM6_DIRECTED    6               /* sending directed beacons */
  71 #define RM7_TRACE       7               /* trace initiated */
  72
  73 #ifdef  DEBUG
  74 /*
  75  * symbolic state names
  76  */
  77 static const char * const rmt_states[] = {
  78         "RM0_ISOLATED","RM1_NON_OP","RM2_RING_OP","RM3_DETECT",
  79         "RM4_NON_OP_DUP","RM5_RING_OP_DUP","RM6_DIRECTED",
  80         "RM7_TRACE"
  81 } ;
  82
  83 /*
  84  * symbolic event names
  85  */
  86 static const char * const rmt_events[] = {
  87         "NONE","RM_RING_OP","RM_RING_NON_OP","RM_MY_BEACON",
  88         "RM_OTHER_BEACON","RM_MY_CLAIM","RM_TRT_EXP","RM_VALID_CLAIM",
  89         "RM_JOIN","RM_LOOP","RM_DUP_ADDR","RM_ENABLE_FLAG",
  90         "RM_TIMEOUT_NON_OP","RM_TIMEOUT_T_STUCK",
  91         "RM_TIMEOUT_ANNOUNCE","RM_TIMEOUT_T_DIRECT",
  92         "RM_TIMEOUT_D_MAX","RM_TIMEOUT_POLL","RM_TX_STATE_CHANGE"
  93 } ;
  94 #endif
  95
  96 /*
  97  * Globals
  98  * in struct s_rmt
  99  */
 100
 101
 102 /*
 103  * function declarations
 104  */
 105 static void rmt_fsm(struct s_smc *smc, int cmd);
 106 static void start_rmt_timer0(struct s_smc *smc, u_long value, int event);
 107 static void start_rmt_timer1(struct s_smc *smc, u_long value, int event);
 108 static void start_rmt_timer2(struct s_smc *smc, u_long value, int event);
 109 static void stop_rmt_timer0(struct s_smc *smc);
 110 static void stop_rmt_timer1(struct s_smc *smc);
 111 static void stop_rmt_timer2(struct s_smc *smc);
 112 static void rmt_dup_actions(struct s_smc *smc);
 113 static void rmt_reinsert_actions(struct s_smc *smc);
 114 static void rmt_leave_actions(struct s_smc *smc);
 115 static void rmt_new_dup_actions(struct s_smc *smc);
 116
 117 #ifndef SUPERNET_3
 118 extern void restart_trt_for_dbcn() ;
 119 #endif /*SUPERNET_3*/
 120
 121 /*
 122         init RMT state machine
 123         clear all RMT vars and flags
 124 */
 125 void rmt_init(struct s_smc *smc)
 126 {
 127         smc->mib.m[MAC0].fddiMACRMTState = ACTIONS(RM0_ISOLATED) ;
 128         smc->r.dup_addr_test = DA_NONE ;
 129         smc->r.da_flag = 0 ;
 130         smc->mib.m[MAC0].fddiMACMA_UnitdataAvailable = FALSE ;
 131         smc->r.sm_ma_avail = FALSE ;
 132         smc->r.loop_avail = 0 ;
 133         smc->r.bn_flag = 0 ;
 134         smc->r.jm_flag = 0 ;
 135         smc->r.no_flag = TRUE ;
 136 }
 137
 138 /*
 139         RMT state machine
 140         called by dispatcher
 141
 142         do
 143                 display state change
 144                 process event
 145         until SM is stable
 146 */
 147 void rmt(struct s_smc *smc, int event)
 148 {
 149         int     state ;
 150
 151         do {
 152                 DB_RMT("RMT : state %s%s",
 153                         (smc->mib.m[MAC0].fddiMACRMTState & AFLAG) ? "ACTIONS " : "",
 154                         rmt_states[smc->mib.m[MAC0].fddiMACRMTState & ~AFLAG]) ;
 155                 DB_RMT(" event %s\n",rmt_events[event],0) ;
 156                 state = smc->mib.m[MAC0].fddiMACRMTState ;
 157                 rmt_fsm(smc,event) ;
 158                 event = 0 ;
 159         } while (state != smc->mib.m[MAC0].fddiMACRMTState) ;
 160         rmt_state_change(smc,(int)smc->mib.m[MAC0].fddiMACRMTState) ;
 161 }
 162
 163 /*
 164         process RMT event
 165 */
 166 static void rmt_fsm(struct s_smc *smc, int cmd)
 167 {
 168         /*
 169          * RM00-RM70 : from all states
 170          */
 171         if (!smc->r.rm_join && !smc->r.rm_loop &&
 172                 smc->mib.m[MAC0].fddiMACRMTState != ACTIONS(RM0_ISOLATED) &&
 173                 smc->mib.m[MAC0].fddiMACRMTState != RM0_ISOLATED) {
 174                 RS_SET(smc,RS_NORINGOP) ;
 175                 rmt_indication(smc,0) ;
 176                 GO_STATE(RM0_ISOLATED) ;
 177                 return ;
 178         }
 179
 180         switch(smc->mib.m[MAC0].fddiMACRMTState) {
 181         case ACTIONS(RM0_ISOLATED) :
 182                 stop_rmt_timer0(smc) ;
 183                 stop_rmt_timer1(smc) ;
 184                 stop_rmt_timer2(smc) ;
 185
 186                 /*
 187                  * Disable MAC.
 188                  */
 189                 sm_ma_control(smc,MA_OFFLINE) ;
 190                 smc->mib.m[MAC0].fddiMACMA_UnitdataAvailable = FALSE ;
 191                 smc->r.loop_avail = FALSE ;
 192                 smc->r.sm_ma_avail = FALSE ;
 193                 smc->r.no_flag = TRUE ;
 194                 DB_RMTN(1,"RMT : ISOLATED\n",0,0) ;
 195                 ACTIONS_DONE() ;
 196                 break ;
 197         case RM0_ISOLATED :
 198                 /*RM01*/
 199                 if (smc->r.rm_join || smc->r.rm_loop) {
 200                         /*
 201                          * According to the standard the MAC must be reset
 202                          * here. The FORMAC will be initialized and Claim
 203                          * and Beacon Frames will be uploaded to the MAC.
 204                          * So any change of Treq will take effect NOW.
 205                          */
 206                         sm_ma_control(smc,MA_RESET) ;
 207                         GO_STATE(RM1_NON_OP) ;
 208                         break ;
 209                 }
 210                 break ;
 211         case ACTIONS(RM1_NON_OP) :
 212                 start_rmt_timer0(smc,smc->s.rmt_t_non_op,RM_TIMEOUT_NON_OP) ;
 213                 stop_rmt_timer1(smc) ;
 214                 stop_rmt_timer2(smc) ;
 215                 sm_ma_control(smc,MA_BEACON) ;
 216                 DB_RMTN(1,"RMT : RING DOWN\n",0,0) ;
 217                 RS_SET(smc,RS_NORINGOP) ;
 218                 smc->r.sm_ma_avail = FALSE ;
 219                 rmt_indication(smc,0) ;
 220                 ACTIONS_DONE() ;
 221                 break ;
 222         case RM1_NON_OP :
 223                 /*RM12*/
 224                 if (cmd == RM_RING_OP) {
 225                         RS_SET(smc,RS_RINGOPCHANGE) ;
 226                         GO_STATE(RM2_RING_OP) ;
 227                         break ;
 228                 }
 229                 /*RM13*/
 230                 else if (cmd == RM_TIMEOUT_NON_OP) {
 231                         smc->r.bn_flag = FALSE ;
 232                         smc->r.no_flag = TRUE ;
 233                         GO_STATE(RM3_DETECT) ;
 234                         break ;
 235                 }
 236                 break ;
 237         case ACTIONS(RM2_RING_OP) :
 238                 stop_rmt_timer0(smc) ;
 239                 stop_rmt_timer1(smc) ;
 240                 stop_rmt_timer2(smc) ;
 241                 smc->r.no_flag = FALSE ;
 242                 if (smc->r.rm_loop)
 243                         smc->r.loop_avail = TRUE ;
 244                 if (smc->r.rm_join) {
 245                         smc->r.sm_ma_avail = TRUE ;
 246                         if (smc->mib.m[MAC0].fddiMACMA_UnitdataEnable)
 247                         smc->mib.m[MAC0].fddiMACMA_UnitdataAvailable = TRUE ;
 248                                 else
 249                         smc->mib.m[MAC0].fddiMACMA_UnitdataAvailable = FALSE ;
 250                 }
 251                 DB_RMTN(1,"RMT : RING UP\n",0,0) ;
 252                 RS_CLEAR(smc,RS_NORINGOP) ;
 253                 RS_SET(smc,RS_RINGOPCHANGE) ;
 254                 rmt_indication(smc,1) ;
 255                 smt_stat_counter(smc,0) ;
 256                 ACTIONS_DONE() ;
 257                 break ;
 258         case RM2_RING_OP :
 259                 /*RM21*/
 260                 if (cmd == RM_RING_NON_OP) {
 261                         smc->mib.m[MAC0].fddiMACMA_UnitdataAvailable = FALSE ;
 262                         smc->r.loop_avail = FALSE ;
 263                         RS_SET(smc,RS_RINGOPCHANGE) ;
 264                         GO_STATE(RM1_NON_OP) ;
 265                         break ;
 266                 }
 267                 /*RM22a*/
 268                 else if (cmd == RM_ENABLE_FLAG) {
 269                         if (smc->mib.m[MAC0].fddiMACMA_UnitdataEnable)
 270                         smc->mib.m[MAC0].fddiMACMA_UnitdataAvailable = TRUE ;
 271                                 else
 272                         smc->mib.m[MAC0].fddiMACMA_UnitdataAvailable = FALSE ;
 273                 }
 274                 /*RM25*/
 275                 else if (smc->r.dup_addr_test == DA_FAILED) {
 276                         smc->mib.m[MAC0].fddiMACMA_UnitdataAvailable = FALSE ;
 277                         smc->r.loop_avail = FALSE ;
 278                         smc->r.da_flag = TRUE ;
 279                         GO_STATE(RM5_RING_OP_DUP) ;
 280                         break ;
 281                 }
 282                 break ;
 283         case ACTIONS(RM3_DETECT) :
 284                 start_rmt_timer0(smc,smc->s.mac_d_max*2,RM_TIMEOUT_D_MAX) ;
 285                 start_rmt_timer1(smc,smc->s.rmt_t_stuck,RM_TIMEOUT_T_STUCK) ;
 286                 start_rmt_timer2(smc,smc->s.rmt_t_poll,RM_TIMEOUT_POLL) ;
 287                 sm_mac_check_beacon_claim(smc) ;
 288                 DB_RMTN(1,"RMT : RM3_DETECT\n",0,0) ;
 289                 ACTIONS_DONE() ;
 290                 break ;
 291         case RM3_DETECT :
 292                 if (cmd == RM_TIMEOUT_POLL) {
 293                         start_rmt_timer2(smc,smc->s.rmt_t_poll,RM_TIMEOUT_POLL);
 294                         sm_mac_check_beacon_claim(smc) ;
 295                         break ;
 296                 }
 297                 if (cmd == RM_TIMEOUT_D_MAX) {
 298                         smc->r.timer0_exp = TRUE ;
 299                 }
 300                 /*
 301                  *jd(22-Feb-1999)
 302                  * We need a time ">= 2*mac_d_max" since we had finished
 303                  * Claim or Beacon state. So we will restart timer0 at
 304                  * every state change.
 305                  */
 306                 if (cmd == RM_TX_STATE_CHANGE) {
 307                         start_rmt_timer0(smc,
 308                                          smc->s.mac_d_max*2,
 309                                          RM_TIMEOUT_D_MAX) ;
 310                 }
 311                 /*RM32*/
 312                 if (cmd == RM_RING_OP) {
 313                         GO_STATE(RM2_RING_OP) ;
 314                         break ;
 315                 }
 316                 /*RM33a*/
 317                 else if ((cmd == RM_MY_BEACON || cmd == RM_OTHER_BEACON)
 318                         && smc->r.bn_flag) {
 319                         smc->r.bn_flag = FALSE ;
 320                 }
 321                 /*RM33b*/
 322                 else if (cmd == RM_TRT_EXP && !smc->r.bn_flag) {
 323                         int     tx ;
 324                         /*
 325                          * set bn_flag only if in state T4 or T5:
 326                          * only if we're the beaconer should we start the
 327                          * trace !
 328                          */
 329                         if ((tx =  sm_mac_get_tx_state(smc)) == 4 || tx == 5) {
 330                         DB_RMTN(2,"RMT : DETECT && TRT_EXPIRED && T4/T5\n",0,0);
 331                                 smc->r.bn_flag = TRUE ;
 332                                 /*
 333                                  * If one of the upstream stations beaconed
 334                                  * and the link to the upstream neighbor is
 335                                  * lost we need to restart the stuck timer to
 336                                  * check the "stuck beacon" condition.
 337                                  */
 338                                 start_rmt_timer1(smc,smc->s.rmt_t_stuck,
 339                                         RM_TIMEOUT_T_STUCK) ;
 340                         }
 341                         /*
 342                          * We do NOT need to clear smc->r.bn_flag in case of
 343                          * not being in state T4 or T5, because the flag
 344                          * must be cleared in order to get in this condition.
 345                          */
 346
 347                         DB_RMTN(2,
 348                         "RMT : sm_mac_get_tx_state() = %d (bn_flag = %d)\n",
 349                         tx,smc->r.bn_flag) ;
 350                 }
 351                 /*RM34a*/
 352                 else if (cmd == RM_MY_CLAIM && smc->r.timer0_exp) {
 353                         rmt_new_dup_actions(smc) ;
 354                         GO_STATE(RM4_NON_OP_DUP) ;
 355                         break ;
 356                 }
 357                 /*RM34b*/
 358                 else if (cmd == RM_MY_BEACON && smc->r.timer0_exp) {
 359                         rmt_new_dup_actions(smc) ;
 360                         GO_STATE(RM4_NON_OP_DUP) ;
 361                         break ;
 362                 }
 363                 /*RM34c*/
 364                 else if (cmd == RM_VALID_CLAIM) {
 365                         rmt_new_dup_actions(smc) ;
 366                         GO_STATE(RM4_NON_OP_DUP) ;
 367                         break ;
 368                 }
 369                 /*RM36*/
 370                 else if (cmd == RM_TIMEOUT_T_STUCK &&
 371                         smc->r.rm_join && smc->r.bn_flag) {
 372                         GO_STATE(RM6_DIRECTED) ;
 373                         break ;
 374                 }
 375                 break ;
 376         case ACTIONS(RM4_NON_OP_DUP) :
 377                 start_rmt_timer0(smc,smc->s.rmt_t_announce,RM_TIMEOUT_ANNOUNCE);
 378                 start_rmt_timer1(smc,smc->s.rmt_t_stuck,RM_TIMEOUT_T_STUCK) ;
 379                 start_rmt_timer2(smc,smc->s.rmt_t_poll,RM_TIMEOUT_POLL) ;
 380                 sm_mac_check_beacon_claim(smc) ;
 381                 DB_RMTN(1,"RMT : RM4_NON_OP_DUP\n",0,0) ;
 382                 ACTIONS_DONE() ;
 383                 break ;
 384         case RM4_NON_OP_DUP :
 385                 if (cmd == RM_TIMEOUT_POLL) {
 386                         start_rmt_timer2(smc,smc->s.rmt_t_poll,RM_TIMEOUT_POLL);
 387                         sm_mac_check_beacon_claim(smc) ;
 388                         break ;
 389                 }
 390                 /*RM41*/
 391                 if (!smc->r.da_flag) {
 392                         GO_STATE(RM1_NON_OP) ;
 393                         break ;
 394                 }
 395                 /*RM44a*/
 396                 else if ((cmd == RM_MY_BEACON || cmd == RM_OTHER_BEACON) &&
 397                         smc->r.bn_flag) {
 398                         smc->r.bn_flag = FALSE ;
 399                 }
 400                 /*RM44b*/
 401                 else if (cmd == RM_TRT_EXP && !smc->r.bn_flag) {
 402                         int     tx ;
 403                         /*
 404                          * set bn_flag only if in state T4 or T5:
 405                          * only if we're the beaconer should we start the
 406                          * trace !
 407                          */
 408                         if ((tx =  sm_mac_get_tx_state(smc)) == 4 || tx == 5) {
 409                         DB_RMTN(2,"RMT : NOPDUP && TRT_EXPIRED && T4/T5\n",0,0);
 410                                 smc->r.bn_flag = TRUE ;
 411                                 /*
 412                                  * If one of the upstream stations beaconed
 413                                  * and the link to the upstream neighbor is
 414                                  * lost we need to restart the stuck timer to
 415                                  * check the "stuck beacon" condition.
 416                                  */
 417                                 start_rmt_timer1(smc,smc->s.rmt_t_stuck,
 418                                         RM_TIMEOUT_T_STUCK) ;
 419                         }
 420                         /*
 421                          * We do NOT need to clear smc->r.bn_flag in case of
 422                          * not being in state T4 or T5, because the flag
 423                          * must be cleared in order to get in this condition.
 424                          */
 425
 426                         DB_RMTN(2,
 427                         "RMT : sm_mac_get_tx_state() = %d (bn_flag = %d)\n",
 428                         tx,smc->r.bn_flag) ;
 429                 }
 430                 /*RM44c*/
 431                 else if (cmd == RM_TIMEOUT_ANNOUNCE && !smc->r.bn_flag) {
 432                         rmt_dup_actions(smc) ;
 433                 }
 434                 /*RM45*/
 435                 else if (cmd == RM_RING_OP) {
 436                         smc->r.no_flag = FALSE ;
 437                         GO_STATE(RM5_RING_OP_DUP) ;
 438                         break ;
 439                 }
 440                 /*RM46*/
 441                 else if (cmd == RM_TIMEOUT_T_STUCK &&
 442                         smc->r.rm_join && smc->r.bn_flag) {
 443                         GO_STATE(RM6_DIRECTED) ;
 444                         break ;
 445                 }
 446                 break ;
 447         case ACTIONS(RM5_RING_OP_DUP) :
 448                 stop_rmt_timer0(smc) ;
 449                 stop_rmt_timer1(smc) ;
 450                 stop_rmt_timer2(smc) ;
 451                 DB_RMTN(1,"RMT : RM5_RING_OP_DUP\n",0,0) ;
 452                 ACTIONS_DONE() ;
 453                 break;
 454         case RM5_RING_OP_DUP :
 455                 /*RM52*/
 456                 if (smc->r.dup_addr_test == DA_PASSED) {
 457                         smc->r.da_flag = FALSE ;
 458                         GO_STATE(RM2_RING_OP) ;
 459                         break ;
 460                 }
 461                 /*RM54*/
 462                 else if (cmd == RM_RING_NON_OP) {
 463                         smc->r.jm_flag = FALSE ;
 464                         smc->r.bn_flag = FALSE ;
 465                         GO_STATE(RM4_NON_OP_DUP) ;
 466                         break ;
 467                 }
 468                 break ;
 469         case ACTIONS(RM6_DIRECTED) :
 470                 start_rmt_timer0(smc,smc->s.rmt_t_direct,RM_TIMEOUT_T_DIRECT) ;
 471                 stop_rmt_timer1(smc) ;
 472                 start_rmt_timer2(smc,smc->s.rmt_t_poll,RM_TIMEOUT_POLL) ;
 473                 sm_ma_control(smc,MA_DIRECTED) ;
 474                 RS_SET(smc,RS_BEACON) ;
 475                 DB_RMTN(1,"RMT : RM6_DIRECTED\n",0,0) ;
 476                 ACTIONS_DONE() ;
 477                 break ;
 478         case RM6_DIRECTED :
 479                 /*RM63*/
 480                 if (cmd == RM_TIMEOUT_POLL) {
 481                         start_rmt_timer2(smc,smc->s.rmt_t_poll,RM_TIMEOUT_POLL);
 482                         sm_mac_check_beacon_claim(smc) ;
 483 #ifndef SUPERNET_3
 484                         /* Because of problems with the Supernet II chip set
 485                          * sending of Directed Beacon will stop after 165ms
 486                          * therefore restart_trt_for_dbcn(smc) will be called
 487                          * to prevent this.
 488                          */
 489                         restart_trt_for_dbcn(smc) ;
 490 #endif /*SUPERNET_3*/
 491                         break ;
 492                 }
 493                 if ((cmd == RM_MY_BEACON || cmd == RM_OTHER_BEACON) &&
 494                         !smc->r.da_flag) {
 495                         smc->r.bn_flag = FALSE ;
 496                         GO_STATE(RM3_DETECT) ;
 497                         break ;
 498                 }
 499                 /*RM64*/
 500                 else if ((cmd == RM_MY_BEACON || cmd == RM_OTHER_BEACON) &&
 501                         smc->r.da_flag) {
 502                         smc->r.bn_flag = FALSE ;
 503                         GO_STATE(RM4_NON_OP_DUP) ;
 504                         break ;
 505                 }
 506                 /*RM67*/
 507                 else if (cmd == RM_TIMEOUT_T_DIRECT) {
 508                         GO_STATE(RM7_TRACE) ;
 509                         break ;
 510                 }
 511                 break ;
 512         case ACTIONS(RM7_TRACE) :
 513                 stop_rmt_timer0(smc) ;
 514                 stop_rmt_timer1(smc) ;
 515                 stop_rmt_timer2(smc) ;
 516                 smc->e.trace_prop |= ENTITY_BIT(ENTITY_MAC) ;
 517                 queue_event(smc,EVENT_ECM,EC_TRACE_PROP) ;
 518                 DB_RMTN(1,"RMT : RM7_TRACE\n",0,0) ;
 519                 ACTIONS_DONE() ;
 520                 break ;
 521         case RM7_TRACE :
 522                 break ;
 523         default:
 524                 SMT_PANIC(smc,SMT_E0122, SMT_E0122_MSG) ;
 525                 break;
 526         }
 527 }
 528
 529 /*
 530  * (jd) RMT duplicate address actions
 531  * leave the ring or reinsert just as configured
 532  */
 533 static void rmt_dup_actions(struct s_smc *smc)
 534 {
 535         if (smc->r.jm_flag) {
 536         }
 537         else {
 538                 if (smc->s.rmt_dup_mac_behavior) {
 539                         SMT_ERR_LOG(smc,SMT_E0138, SMT_E0138_MSG) ;
 540                         rmt_reinsert_actions(smc) ;
 541                 }
 542                 else {
 543                         SMT_ERR_LOG(smc,SMT_E0135, SMT_E0135_MSG) ;
 544                         rmt_leave_actions(smc) ;
 545                 }
 546         }
 547 }
 548
 549 /*
 550  * Reconnect to the Ring
 551  */
 552 static void rmt_reinsert_actions(struct s_smc *smc)
 553 {
 554         queue_event(smc,EVENT_ECM,EC_DISCONNECT) ;
 555         queue_event(smc,EVENT_ECM,EC_CONNECT) ;
 556 }
 557
 558 /*
 559  * duplicate address detected
 560  */
 561 static void rmt_new_dup_actions(struct s_smc *smc)
 562 {
 563         smc->r.da_flag = TRUE ;
 564         smc->r.bn_flag = FALSE ;
 565         smc->r.jm_flag = FALSE ;
 566         /*
 567          * we have three options : change address, jam or leave
 568          * we leave the ring as default
 569          * Optionally it's possible to reinsert after leaving the Ring
 570          * but this will not conform with SMT Spec.
 571          */
 572         if (smc->s.rmt_dup_mac_behavior) {
 573                 SMT_ERR_LOG(smc,SMT_E0138, SMT_E0138_MSG) ;
 574                 rmt_reinsert_actions(smc) ;
 575         }
 576         else {
 577                 SMT_ERR_LOG(smc,SMT_E0135, SMT_E0135_MSG) ;
 578                 rmt_leave_actions(smc) ;
 579         }
 580 }
 581
 582
 583 /*
 584  * leave the ring
 585  */
 586 static void rmt_leave_actions(struct s_smc *smc)
 587 {
 588         queue_event(smc,EVENT_ECM,EC_DISCONNECT) ;
 589         /*
 590          * Note: Do NOT try again later. (with please reconnect)
 591          * The station must be left from the ring!
 592          */
 593 }
 594
 595 /*
 596  * SMT timer interface
 597  *      start RMT timer 0
 598  */
 599 static void start_rmt_timer0(struct s_smc *smc, u_long value, int event)
 600 {
 601         smc->r.timer0_exp = FALSE ;             /* clear timer event flag */
 602         smt_timer_start(smc,&smc->r.rmt_timer0,value,EV_TOKEN(EVENT_RMT,event));
 603 }
 604
 605 /*
 606  * SMT timer interface
 607  *      start RMT timer 1
 608  */
 609 static void start_rmt_timer1(struct s_smc *smc, u_long value, int event)
 610 {
 611         smc->r.timer1_exp = FALSE ;     /* clear timer event flag */
 612         smt_timer_start(smc,&smc->r.rmt_timer1,value,EV_TOKEN(EVENT_RMT,event));
 613 }
 614
 615 /*
 616  * SMT timer interface
 617  *      start RMT timer 2
 618  */
 619 static void start_rmt_timer2(struct s_smc *smc, u_long value, int event)
 620 {
 621         smc->r.timer2_exp = FALSE ;             /* clear timer event flag */
 622         smt_timer_start(smc,&smc->r.rmt_timer2,value,EV_TOKEN(EVENT_RMT,event));
 623 }
 624
 625 /*
 626  * SMT timer interface
 627  *      stop RMT timer 0
 628  */
 629 static void stop_rmt_timer0(struct s_smc *smc)
 630 {
 631         if (smc->r.rmt_timer0.tm_active)
 632                 smt_timer_stop(smc,&smc->r.rmt_timer0) ;
 633 }
 634
 635 /*
 636  * SMT timer interface
 637  *      stop RMT timer 1
 638  */
 639 static void stop_rmt_timer1(struct s_smc *smc)
 640 {
 641         if (smc->r.rmt_timer1.tm_active)
 642                 smt_timer_stop(smc,&smc->r.rmt_timer1) ;
 643 }
 644
 645 /*
 646  * SMT timer interface
 647  *      stop RMT timer 2
 648  */
 649 static void stop_rmt_timer2(struct s_smc *smc)
 650 {
 651         if (smc->r.rmt_timer2.tm_active)
 652                 smt_timer_stop(smc,&smc->r.rmt_timer2) ;
 653 }
 654