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 1.4 2004/02/13 17:45:50 joerg Exp $
  34  *
  35  *      last edit-date: [Thu Aug 24 12:48:52 2000]
  36  *
  37  *---------------------------------------------------------------------------*/
  38
  39 #if defined(__DragonFly__) || defined(__FreeBSD__)
  40 #include "use_i4bq921.h"
  41 #else
  42 #define NI4BQ921        1
  43 #endif
  44 #if NI4BQ921 > 0
  45
  46 #include <sys/param.h>
  47 #include <sys/kernel.h>
  48 #include <sys/systm.h>
  49 #include <sys/socket.h>
  50 #include <net/if.h>
  51
  52 #if defined(__NetBSD__) && __NetBSD_Version__ >= 104230000
  53 #include <sys/callout.h>
  54 #endif
  55
  56 #if defined(__DragonFly__) || defined(__FreeBSD__)
  57 #include <net/i4b/include/machine/i4b_debug.h>
  58 #else
  59 #include <i4b/i4b_debug.h>
  60 #include <i4b/i4b_ioctl.h>
  61 #endif
  62
  63 #include "../include/i4b_global.h"
  64
  65 #include "i4b_l2.h"
  66 #include "i4b_l2fsm.h"
  67
  68 /*---------------------------------------------------------------------------*
  69  *      Q.921 timer T200 timeout function
  70  *---------------------------------------------------------------------------*/
  71 static void
  72 i4b_T200_timeout(l2_softc_t *l2sc)
  73 {
  74         NDBGL2(L2_T_ERR, "unit %d, RC = %d", l2sc->unit, l2sc->RC);
  75         i4b_next_l2state(l2sc, EV_T200EXP);
  76 }
  77
  78 /*---------------------------------------------------------------------------*
  79  *      Q.921 timer T200 start
  80  *---------------------------------------------------------------------------*/
  81 void
  82 i4b_T200_start(l2_softc_t *l2sc)
  83 {
  84         if(l2sc->T200 == TIMER_ACTIVE)
  85                 return;
  86
  87         NDBGL2(L2_T_MSG, "unit %d", l2sc->unit);
  88         l2sc->T200 = TIMER_ACTIVE;
  89
  90         START_TIMER(l2sc->T200_callout, i4b_T200_timeout, l2sc, T200DEF);
  91 }
  92
  93 /*---------------------------------------------------------------------------*
  94  *      Q.921 timer T200 stop
  95  *---------------------------------------------------------------------------*/
  96 void
  97 i4b_T200_stop(l2_softc_t *l2sc)
  98 {
  99         CRIT_VAR;
 100         CRIT_BEG;
 101         if(l2sc->T200 != TIMER_IDLE)
 102         {
 103                 STOP_TIMER(l2sc->T200_callout, i4b_T200_timeout, l2sc);
 104                 l2sc->T200 = TIMER_IDLE;
 105         }
 106         CRIT_END;
 107         NDBGL2(L2_T_MSG, "unit %d", l2sc->unit);
 108 }
 109
 110 /*---------------------------------------------------------------------------*
 111  *      Q.921 timer T200 restart
 112  *---------------------------------------------------------------------------*/
 113 void
 114 i4b_T200_restart(l2_softc_t *l2sc)
 115 {
 116         CRIT_VAR;
 117         CRIT_BEG;
 118         if(l2sc->T200 != TIMER_IDLE)
 119         {
 120                 STOP_TIMER(l2sc->T200_callout, i4b_T200_timeout, l2sc);
 121         }
 122         else
 123         {
 124                 l2sc->T200 = TIMER_ACTIVE;
 125         }
 126
 127         START_TIMER(l2sc->T200_callout, i4b_T200_timeout, l2sc, T200DEF);
 128         CRIT_END;
 129         NDBGL2(L2_T_MSG, "unit %d", l2sc->unit);
 130 }
 131
 132 /*---------------------------------------------------------------------------*
 133  *      Q.921 timer T202 timeout function
 134  *---------------------------------------------------------------------------*/
 135 static void
 136 i4b_T202_timeout(l2_softc_t *l2sc)
 137 {
 138         NDBGL2(L2_T_ERR, "unit %d, N202 = %d", l2sc->unit, l2sc->N202);
 139
 140         if(--(l2sc->N202))
 141         {
 142                 (*l2sc->T202func)(l2sc);
 143         }
 144 }
 145
 146 /*---------------------------------------------------------------------------*
 147  *      Q.921 timer T202 start
 148  *---------------------------------------------------------------------------*/
 149 void
 150 i4b_T202_start(l2_softc_t *l2sc)
 151 {
 152         if (l2sc->N202 == TIMER_ACTIVE)
 153                 return;
 154
 155         NDBGL2(L2_T_MSG, "unit %d", l2sc->unit);
 156         l2sc->N202 = N202DEF;
 157         l2sc->T202 = TIMER_ACTIVE;
 158
 159         START_TIMER(l2sc->T202_callout, i4b_T202_timeout, l2sc, T202DEF);
 160 }
 161
 162 /*---------------------------------------------------------------------------*
 163  *      Q.921 timer T202 stop
 164  *---------------------------------------------------------------------------*/
 165 void
 166 i4b_T202_stop(l2_softc_t *l2sc)
 167 {
 168         CRIT_VAR;
 169         CRIT_BEG;
 170         if(l2sc->T202 != TIMER_IDLE)
 171         {
 172                 STOP_TIMER(l2sc->T202_callout, i4b_T202_timeout, l2sc);
 173                 l2sc->T202 = TIMER_IDLE;
 174         }
 175         CRIT_END;
 176         NDBGL2(L2_T_MSG, "unit %d", l2sc->unit);
 177 }
 178
 179 /*---------------------------------------------------------------------------*
 180  *      Q.921 timer T203 timeout function
 181  *---------------------------------------------------------------------------*/
 182 #if I4B_T203_ACTIVE
 183 static void
 184 i4b_T203_timeout(l2_softc_t *l2sc)
 185 {
 186         NDBGL2(L2_T_ERR, "unit %d", l2sc->unit);
 187         i4b_next_l2state(l2sc, EV_T203EXP);
 188 }
 189 #endif
 190
 191 /*---------------------------------------------------------------------------*
 192  *      Q.921 timer T203 start
 193  *---------------------------------------------------------------------------*/
 194 void
 195 i4b_T203_start(l2_softc_t *l2sc)
 196 {
 197 #if I4B_T203_ACTIVE
 198         if (l2sc->T203 == TIMER_ACTIVE)
 199                 return;
 200
 201         NDBGL2(L2_T_MSG, "unit %d", l2sc->unit);
 202         l2sc->T203 = TIMER_ACTIVE;
 203
 204         START_TIMER(l2sc->T203_callout, i4b_T203_timeout, l2sc, T203DEF);
 205 #endif
 206 }
 207
 208 /*---------------------------------------------------------------------------*
 209  *      Q.921 timer T203 stop
 210  *---------------------------------------------------------------------------*/
 211 void
 212 i4b_T203_stop(l2_softc_t *l2sc)
 213 {
 214 #if I4B_T203_ACTIVE
 215         CRIT_VAR;
 216         CRIT_BEG;
 217         if(l2sc->T203 != TIMER_IDLE)
 218         {
 219                 STOP_TIMER(l2sc->T203_callout, i4b_T203_timeout, l2sc);
 220                 l2sc->T203 = TIMER_IDLE;
 221         }
 222         CRIT_END;
 223         NDBGL2(L2_T_MSG, "unit %d", l2sc->unit);
 224 #endif
 225 }
 226
 227 /*---------------------------------------------------------------------------*
 228  *      Q.921 timer T203 restart
 229  *---------------------------------------------------------------------------*/
 230 void
 231 i4b_T203_restart(l2_softc_t *l2sc)
 232 {
 233 #if I4B_T203_ACTIVE
 234         CRIT_VAR;
 235         CRIT_BEG;
 236
 237         if(l2sc->T203 != TIMER_IDLE)
 238         {
 239                 STOP_TIMER(l2sc->T203_callout, i4b_T203_timerout, l2sc);
 240         }
 241         else
 242         {
 243                 l2sc->T203 = TIMER_ACTIVE;
 244         }
 245
 246         START_TIMER(l2sc->T203_callout, i4b_T203_timerout, l2sc, T203DEF);
 247         CRIT_END;
 248         NDBGL2(L2_T_MSG, "unit %d", l2sc->unit);
 249 #endif
 250 }
 251
 252 #endif /* NI4BQ921 > 0 */