sys/net/i4b/layer2/i4b_l2timer.c

   1 /*
   2  * Copyright (c) 1997, 2000 Hellmuth Michaelis. All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions
   6  * are met:
   7  * 1. Redistributions of source code must retain the above copyright
   8  *    notice, this list of conditions and the following disclaimer.
   9  * 2. Redistributions in binary form must reproduce the above copyright
  10  *    notice, this list of conditions and the following disclaimer in the
  11  *    documentation and/or other materials provided with the distribution.
  12  *
  13  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  14  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  16  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  17  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  18  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  19  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  20  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  21  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  22  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  23  * SUCH DAMAGE.
  24  *
  25  *---------------------------------------------------------------------------
  26  *
  27  *      i4b_l2timer.c - layer 2 timer handling
  28  *      --------------------------------------
  29  *
  30  *      $Id: i4b_l2timer.c,v 1.20 2000/08/24 11:48:58 hm Exp $
  31  *
  32  * $FreeBSD: src/sys/i4b/layer2/i4b_l2timer.c,v 1.6.2.1 2001/08/10 14:08:41 obrien Exp $
  33  * $DragonFly: src/sys/net/i4b/layer2/i4b_l2timer.c,v 1.7 2005/06/14 21:19:19 joerg Exp $
  34  *
  35  *      last edit-date: [Thu Aug 24 12:48:52 2000]
  36  *
  37  *---------------------------------------------------------------------------*/
  38
  39 #include "use_i4bq921.h"
  40 #if NI4BQ921 > 0
  41
  42 #include <sys/param.h>
  43 #include <sys/kernel.h>
  44 #include <sys/systm.h>
  45 #include <sys/socket.h>
  46 #include <sys/thread2.h>
  47 #include <net/if.h>
  48
  49 #include <net/i4b/include/machine/i4b_debug.h>
  50 #include "../include/i4b_global.h"
  51
  52 #include "i4b_l2.h"
  53 #include "i4b_l2fsm.h"
  54
  55 /*---------------------------------------------------------------------------*
  56  *      Q.921 timer T200 timeout function
  57  *---------------------------------------------------------------------------*/
  58 static void
  59 i4b_T200_timeout(l2_softc_t *l2sc)
  60 {
  61         NDBGL2(L2_T_ERR, "unit %d, RC = %d", l2sc->unit, l2sc->RC);
  62         i4b_next_l2state(l2sc, EV_T200EXP);
  63 }
  64
  65 /*---------------------------------------------------------------------------*
  66  *      Q.921 timer T200 start
  67  *---------------------------------------------------------------------------*/
  68 void
  69 i4b_T200_start(l2_softc_t *l2sc)
  70 {
  71         if(l2sc->T200 == TIMER_ACTIVE)
  72                 return;
  73
  74         NDBGL2(L2_T_MSG, "unit %d", l2sc->unit);
  75         l2sc->T200 = TIMER_ACTIVE;
  76
  77         callout_reset(&l2sc->T200_timeout, T200DEF,
  78                         (void *)i4b_T200_timeout, l2sc);
  79 }
  80
  81 /*---------------------------------------------------------------------------*
  82  *      Q.921 timer T200 stop
  83  *---------------------------------------------------------------------------*/
  84 void
  85 i4b_T200_stop(l2_softc_t *l2sc)
  86 {
  87         CRIT_VAR;
  88         CRIT_BEG;
  89         if(l2sc->T200 != TIMER_IDLE)
  90         {
  91                 callout_stop(&l2sc->T200_timeout);
  92                 l2sc->T200 = TIMER_IDLE;
  93         }
  94         CRIT_END;
  95         NDBGL2(L2_T_MSG, "unit %d", l2sc->unit);
  96 }
  97
  98 /*---------------------------------------------------------------------------*
  99  *      Q.921 timer T200 restart
 100  *---------------------------------------------------------------------------*/
 101 void
 102 i4b_T200_restart(l2_softc_t *l2sc)
 103 {
 104         CRIT_VAR;
 105         CRIT_BEG;
 106         if(l2sc->T200 != TIMER_IDLE)
 107         {
 108                 callout_stop(&l2sc->T200_timeout);
 109         }
 110         else
 111         {
 112                 l2sc->T200 = TIMER_ACTIVE;
 113         }
 114
 115         callout_reset(&l2sc->T200_timeout, T200DEF,
 116                         (void *)i4b_T200_timeout, l2sc);
 117         CRIT_END;
 118         NDBGL2(L2_T_MSG, "unit %d", l2sc->unit);
 119 }
 120
 121 /*---------------------------------------------------------------------------*
 122  *      Q.921 timer T202 timeout function
 123  *---------------------------------------------------------------------------*/
 124 static void
 125 i4b_T202_timeout(l2_softc_t *l2sc)
 126 {
 127         NDBGL2(L2_T_ERR, "unit %d, N202 = %d", l2sc->unit, l2sc->N202);
 128
 129         if(--(l2sc->N202))
 130         {
 131                 (*l2sc->T202func)(l2sc);
 132         }
 133 }
 134
 135 /*---------------------------------------------------------------------------*
 136  *      Q.921 timer T202 start
 137  *---------------------------------------------------------------------------*/
 138 void
 139 i4b_T202_start(l2_softc_t *l2sc)
 140 {
 141         if (l2sc->N202 == TIMER_ACTIVE)
 142                 return;
 143
 144         NDBGL2(L2_T_MSG, "unit %d", l2sc->unit);
 145         l2sc->N202 = N202DEF;
 146         l2sc->T202 = TIMER_ACTIVE;
 147
 148         callout_reset(&l2sc->T202_timeout, T202DEF,
 149                         (void *)i4b_T202_timeout, l2sc);
 150 }
 151
 152 /*---------------------------------------------------------------------------*
 153  *      Q.921 timer T202 stop
 154  *---------------------------------------------------------------------------*/
 155 void
 156 i4b_T202_stop(l2_softc_t *l2sc)
 157 {
 158         CRIT_VAR;
 159         CRIT_BEG;
 160         if(l2sc->T202 != TIMER_IDLE)
 161         {
 162                 callout_stop(&l2sc->T202_timeout);
 163                 l2sc->T202 = TIMER_IDLE;
 164         }
 165         CRIT_END;
 166         NDBGL2(L2_T_MSG, "unit %d", l2sc->unit);
 167 }
 168
 169 /*---------------------------------------------------------------------------*
 170  *      Q.921 timer T203 timeout function
 171  *---------------------------------------------------------------------------*/
 172 #if I4B_T203_ACTIVE
 173 static void
 174 i4b_T203_timeout(l2_softc_t *l2sc)
 175 {
 176         NDBGL2(L2_T_ERR, "unit %d", l2sc->unit);
 177         i4b_next_l2state(l2sc, EV_T203EXP);
 178 }
 179 #endif
 180
 181 /*---------------------------------------------------------------------------*
 182  *      Q.921 timer T203 start
 183  *---------------------------------------------------------------------------*/
 184 void
 185 i4b_T203_start(l2_softc_t *l2sc)
 186 {
 187 #if I4B_T203_ACTIVE
 188         if (l2sc->T203 == TIMER_ACTIVE)
 189                 return;
 190
 191         NDBGL2(L2_T_MSG, "unit %d", l2sc->unit);
 192         l2sc->T203 = TIMER_ACTIVE;
 193
 194         callout_reset(&l2sc->T203_timeout, T203DEF, i4b_T203_timeout, l2sc);
 195 #endif
 196 }
 197
 198 /*---------------------------------------------------------------------------*
 199  *      Q.921 timer T203 stop
 200  *---------------------------------------------------------------------------*/
 201 void
 202 i4b_T203_stop(l2_softc_t *l2sc)
 203 {
 204 #if I4B_T203_ACTIVE
 205         CRIT_VAR;
 206         CRIT_BEG;
 207         if(l2sc->T203 != TIMER_IDLE)
 208         {
 209                 callout_stop(&l2sc->T203_timeout);
 210                 l2sc->T203 = TIMER_IDLE;
 211         }
 212         CRIT_END;
 213         NDBGL2(L2_T_MSG, "unit %d", l2sc->unit);
 214 #endif
 215 }
 216
 217 /*---------------------------------------------------------------------------*
 218  *      Q.921 timer T203 restart
 219  *---------------------------------------------------------------------------*/
 220 void
 221 i4b_T203_restart(l2_softc_t *l2sc)
 222 {
 223 #if I4B_T203_ACTIVE
 224         CRIT_VAR;
 225         CRIT_BEG;
 226
 227         if(l2sc->T203 != TIMER_IDLE)
 228         {
 229                 callout_stop(&l2sc->T203_timeout);
 230         }
 231         else
 232         {
 233                 l2sc->T203 = TIMER_ACTIVE;
 234         }
 235
 236         callout_reset(&l2sc->T203_timeout, T203DEF, i4b_T203_timerout, l2sc);
 237         CRIT_END;
 238         NDBGL2(L2_T_MSG, "unit %d", l2sc->unit);
 239 #endif
 240 }
 241
 242 #endif /* NI4BQ921 > 0 */