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  *
  34  *      last edit-date: [Thu Aug 24 12:48:52 2000]
  35  *
  36  *---------------------------------------------------------------------------*/
  37
  38 #ifdef __FreeBSD__
  39 #include "i4bq921.h"
  40 #else
  41 #define NI4BQ921        1
  42 #endif
  43 #if NI4BQ921 > 0
  44
  45 #include <sys/param.h>
  46 #include <sys/kernel.h>
  47 #include <sys/systm.h>
  48 #include <sys/socket.h>
  49 #include <net/if.h>
  50
  51 #if defined(__NetBSD__) && __NetBSD_Version__ >= 104230000
  52 #include <sys/callout.h>
  53 #endif
  54
  55 #ifdef __FreeBSD__
  56 #include <machine/i4b_debug.h>
  57 #else
  58 #include <i4b/i4b_debug.h>
  59 #include <i4b/i4b_ioctl.h>
  60 #endif
  61
  62 #include <i4b/include/i4b_global.h>
  63
  64 #include <i4b/layer2/i4b_l2.h>
  65 #include <i4b/layer2/i4b_l2fsm.h>
  66
  67 /*---------------------------------------------------------------------------*
  68  *      Q.921 timer T200 timeout function
  69  *---------------------------------------------------------------------------*/
  70 static void
  71 i4b_T200_timeout(l2_softc_t *l2sc)
  72 {
  73         NDBGL2(L2_T_ERR, "unit %d, RC = %d", l2sc->unit, l2sc->RC);
  74         i4b_next_l2state(l2sc, EV_T200EXP);
  75 }
  76
  77 /*---------------------------------------------------------------------------*
  78  *      Q.921 timer T200 start
  79  *---------------------------------------------------------------------------*/
  80 void
  81 i4b_T200_start(l2_softc_t *l2sc)
  82 {
  83         if(l2sc->T200 == TIMER_ACTIVE)
  84                 return;
  85
  86         NDBGL2(L2_T_MSG, "unit %d", l2sc->unit);
  87         l2sc->T200 = TIMER_ACTIVE;
  88
  89         START_TIMER(l2sc->T200_callout, i4b_T200_timeout, l2sc, T200DEF);
  90 }
  91
  92 /*---------------------------------------------------------------------------*
  93  *      Q.921 timer T200 stop
  94  *---------------------------------------------------------------------------*/
  95 void
  96 i4b_T200_stop(l2_softc_t *l2sc)
  97 {
  98         CRIT_VAR;
  99         CRIT_BEG;
 100         if(l2sc->T200 != TIMER_IDLE)
 101         {
 102                 STOP_TIMER(l2sc->T200_callout, i4b_T200_timeout, l2sc);
 103                 l2sc->T200 = TIMER_IDLE;
 104         }
 105         CRIT_END;
 106         NDBGL2(L2_T_MSG, "unit %d", l2sc->unit);
 107 }
 108
 109 /*---------------------------------------------------------------------------*
 110  *      Q.921 timer T200 restart
 111  *---------------------------------------------------------------------------*/
 112 void
 113 i4b_T200_restart(l2_softc_t *l2sc)
 114 {
 115         CRIT_VAR;
 116         CRIT_BEG;
 117         if(l2sc->T200 != TIMER_IDLE)
 118         {
 119                 STOP_TIMER(l2sc->T200_callout, i4b_T200_timeout, l2sc);
 120         }
 121         else
 122         {
 123                 l2sc->T200 = TIMER_ACTIVE;
 124         }
 125
 126         START_TIMER(l2sc->T200_callout, i4b_T200_timeout, l2sc, T200DEF);
 127         CRIT_END;
 128         NDBGL2(L2_T_MSG, "unit %d", l2sc->unit);
 129 }
 130
 131 /*---------------------------------------------------------------------------*
 132  *      Q.921 timer T202 timeout function
 133  *---------------------------------------------------------------------------*/
 134 static void
 135 i4b_T202_timeout(l2_softc_t *l2sc)
 136 {
 137         NDBGL2(L2_T_ERR, "unit %d, N202 = %d", l2sc->unit, l2sc->N202);
 138
 139         if(--(l2sc->N202))
 140         {
 141                 (*l2sc->T202func)(l2sc);
 142         }
 143 }
 144
 145 /*---------------------------------------------------------------------------*
 146  *      Q.921 timer T202 start
 147  *---------------------------------------------------------------------------*/
 148 void
 149 i4b_T202_start(l2_softc_t *l2sc)
 150 {
 151         if (l2sc->N202 == TIMER_ACTIVE)
 152                 return;
 153
 154         NDBGL2(L2_T_MSG, "unit %d", l2sc->unit);
 155         l2sc->N202 = N202DEF;
 156         l2sc->T202 = TIMER_ACTIVE;
 157
 158         START_TIMER(l2sc->T202_callout, i4b_T202_timeout, l2sc, T202DEF);
 159 }
 160
 161 /*---------------------------------------------------------------------------*
 162  *      Q.921 timer T202 stop
 163  *---------------------------------------------------------------------------*/
 164 void
 165 i4b_T202_stop(l2_softc_t *l2sc)
 166 {
 167         CRIT_VAR;
 168         CRIT_BEG;
 169         if(l2sc->T202 != TIMER_IDLE)
 170         {
 171                 STOP_TIMER(l2sc->T202_callout, i4b_T202_timeout, l2sc);
 172                 l2sc->T202 = TIMER_IDLE;
 173         }
 174         CRIT_END;
 175         NDBGL2(L2_T_MSG, "unit %d", l2sc->unit);
 176 }
 177
 178 /*---------------------------------------------------------------------------*
 179  *      Q.921 timer T203 timeout function
 180  *---------------------------------------------------------------------------*/
 181 #if I4B_T203_ACTIVE
 182 static void
 183 i4b_T203_timeout(l2_softc_t *l2sc)
 184 {
 185         NDBGL2(L2_T_ERR, "unit %d", l2sc->unit);
 186         i4b_next_l2state(l2sc, EV_T203EXP);
 187 }
 188 #endif
 189
 190 /*---------------------------------------------------------------------------*
 191  *      Q.921 timer T203 start
 192  *---------------------------------------------------------------------------*/
 193 void
 194 i4b_T203_start(l2_softc_t *l2sc)
 195 {
 196 #if I4B_T203_ACTIVE
 197         if (l2sc->T203 == TIMER_ACTIVE)
 198                 return;
 199
 200         NDBGL2(L2_T_MSG, "unit %d", l2sc->unit);
 201         l2sc->T203 = TIMER_ACTIVE;
 202
 203         START_TIMER(l2sc->T203_callout, i4b_T203_timeout, l2sc, T203DEF);
 204 #endif
 205 }
 206
 207 /*---------------------------------------------------------------------------*
 208  *      Q.921 timer T203 stop
 209  *---------------------------------------------------------------------------*/
 210 void
 211 i4b_T203_stop(l2_softc_t *l2sc)
 212 {
 213 #if I4B_T203_ACTIVE
 214         CRIT_VAR;
 215         CRIT_BEG;
 216         if(l2sc->T203 != TIMER_IDLE)
 217         {
 218                 STOP_TIMER(l2sc->T203_callout, i4b_T203_timeout, l2sc);
 219                 l2sc->T203 = TIMER_IDLE;
 220         }
 221         CRIT_END;
 222         NDBGL2(L2_T_MSG, "unit %d", l2sc->unit);
 223 #endif
 224 }
 225
 226 /*---------------------------------------------------------------------------*
 227  *      Q.921 timer T203 restart
 228  *---------------------------------------------------------------------------*/
 229 void
 230 i4b_T203_restart(l2_softc_t *l2sc)
 231 {
 232 #if I4B_T203_ACTIVE
 233         CRIT_VAR;
 234         CRIT_BEG;
 235
 236         if(l2sc->T203 != TIMER_IDLE)
 237         {
 238                 STOP_TIMER(l2sc->T203_callout, i4b_T203_timerout, l2sc);
 239         }
 240         else
 241         {
 242                 l2sc->T203 = TIMER_ACTIVE;
 243         }
 244
 245         START_TIMER(l2sc->T203_callout, i4b_T203_timerout, l2sc, T203DEF);
 246         CRIT_END;
 247         NDBGL2(L2_T_MSG, "unit %d", l2sc->unit);
 248 #endif
 249 }
 250
 251 #endif /* NI4BQ921 > 0 */