sys/i4b/layer1/isic/i4b_l1.c

   1 /*-
   2  * Copyright (c) 1997, 2001 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  *
  28  *      i4b_l1.c - isdn4bsd layer 1 handler
  29  *      -----------------------------------
  30  *      last edit-date: [Wed Jan 24 09:12:03 2001]
  31  *
  32  *---------------------------------------------------------------------------*/
  33
  34 #include <sys/cdefs.h>
  35 __FBSDID("$FreeBSD$");
  36
  37 #include <sys/param.h>
  38 #include <sys/systm.h>
  39 #include <sys/mbuf.h>
  40 #include <sys/socket.h>
  41
  42 #include <net/if.h>
  43
  44 #include <i4b/include/i4b_debug.h>
  45 #include <i4b/include/i4b_ioctl.h>
  46 #include <i4b/include/i4b_trace.h>
  47
  48 #include <i4b/layer1/isic/i4b_isic.h>
  49 #include <i4b/layer1/isic/i4b_isac.h>
  50
  51 #include <i4b/layer1/i4b_l1.h>
  52
  53 #include <i4b/include/i4b_mbuf.h>
  54 #include <i4b/include/i4b_global.h>
  55
  56 /*---------------------------------------------------------------------------*
  57  *
  58  *      L2 -> L1: PH-DATA-REQUEST
  59  *      =========================
  60  *
  61  *      parms:
  62  *              unit            physical interface unit number
  63  *              m               mbuf containing L2 frame to be sent out
  64  *              freeflag        MBUF_FREE: free mbuf here after having sent
  65  *                                              it out
  66  *                              MBUF_DONTFREE: mbuf is freed by Layer 2
  67  *      returns:
  68  *              ==0     fail, nothing sent out
  69  *              !=0     ok, frame sent out
  70  *
  71  *---------------------------------------------------------------------------*/
  72 int
  73 isic_ph_data_req(int unit, struct mbuf *m, int freeflag)
  74 {
  75         u_char cmd;
  76         int s;
  77         struct l1_softc *sc = &l1_sc[unit];
  78
  79 #ifdef NOTDEF
  80         NDBGL1(L1_PRIM, "unit %d, freeflag=%d", unit, freeflag);
  81 #endif
  82
  83         if(m == NULL)                   /* failsafe */
  84                 return (0);
  85
  86         s = SPLI4B();
  87
  88         if(sc->sc_I430state == ST_F3)   /* layer 1 not running ? */
  89         {
  90                 NDBGL1(L1_I_ERR, "still in state F3!");
  91                 isic_ph_activate_req(unit);
  92         }
  93
  94         if(sc->sc_state & ISAC_TX_ACTIVE)
  95         {
  96                 if(sc->sc_obuf2 == NULL)
  97                 {
  98                         sc->sc_obuf2 = m;               /* save mbuf ptr */
  99
 100                         if(freeflag)
 101                                 sc->sc_freeflag2 = 1;   /* IRQ must mfree */
 102                         else
 103                                 sc->sc_freeflag2 = 0;   /* IRQ must not mfree */
 104
 105                         NDBGL1(L1_I_MSG, "using 2nd ISAC TX buffer, state = %s", isic_printstate(sc));
 106
 107                         if(sc->sc_trace & TRACE_D_TX)
 108                         {
 109                                 i4b_trace_hdr_t hdr;
 110                                 hdr.unit = L0ISICUNIT(unit);
 111                                 hdr.type = TRC_CH_D;
 112                                 hdr.dir = FROM_TE;
 113                                 hdr.count = ++sc->sc_trace_dcount;
 114                                 MICROTIME(hdr.time);
 115                                 i4b_l1_trace_ind(&hdr, m->m_len, m->m_data);
 116                         }
 117                         splx(s);
 118                         return(1);
 119                 }
 120
 121                 NDBGL1(L1_I_ERR, "No Space in TX FIFO, state = %s", isic_printstate(sc));
 122
 123                 if(freeflag == MBUF_FREE)
 124                         i4b_Dfreembuf(m);
 125
 126                 splx(s);
 127                 return (0);
 128         }
 129
 130         if(sc->sc_trace & TRACE_D_TX)
 131         {
 132                 i4b_trace_hdr_t hdr;
 133                 hdr.unit = L0ISICUNIT(unit);
 134                 hdr.type = TRC_CH_D;
 135                 hdr.dir = FROM_TE;
 136                 hdr.count = ++sc->sc_trace_dcount;
 137                 MICROTIME(hdr.time);
 138                 i4b_l1_trace_ind(&hdr, m->m_len, m->m_data);
 139         }
 140
 141         sc->sc_state |= ISAC_TX_ACTIVE; /* set transmitter busy flag */
 142
 143         NDBGL1(L1_I_MSG, "ISAC_TX_ACTIVE set");
 144
 145         sc->sc_freeflag = 0;            /* IRQ must NOT mfree */
 146
 147         ISAC_WRFIFO(m->m_data, min(m->m_len, ISAC_FIFO_LEN)); /* output to TX fifo */
 148
 149         if(m->m_len > ISAC_FIFO_LEN)    /* message > 32 bytes ? */
 150         {
 151                 sc->sc_obuf = m;        /* save mbuf ptr */
 152                 sc->sc_op = m->m_data + ISAC_FIFO_LEN;  /* ptr for irq hdl */
 153                 sc->sc_ol = m->m_len - ISAC_FIFO_LEN;   /* length for irq hdl */
 154
 155                 if(freeflag)
 156                         sc->sc_freeflag = 1;    /* IRQ must mfree */
 157
 158                 cmd = ISAC_CMDR_XTF;
 159         }
 160         else
 161         {
 162                 sc->sc_obuf = NULL;
 163                 sc->sc_op = NULL;
 164                 sc->sc_ol = 0;
 165
 166                 if(freeflag)
 167                         i4b_Dfreembuf(m);
 168
 169                 cmd = ISAC_CMDR_XTF | ISAC_CMDR_XME;
 170         }
 171
 172         ISAC_WRITE(I_CMDR, cmd);
 173         ISACCMDRWRDELAY();
 174
 175         splx(s);
 176
 177         return(1);
 178 }
 179
 180 /*---------------------------------------------------------------------------*
 181  *
 182  *      L2 -> L1: PH-ACTIVATE-REQUEST
 183  *      =============================
 184  *
 185  *      parms:
 186  *              unit    physical interface unit number
 187  *
 188  *      returns:
 189  *              ==0
 190  *              !=0
 191  *
 192  *---------------------------------------------------------------------------*/
 193 int
 194 isic_ph_activate_req(int unit)
 195 {
 196         struct l1_softc *sc = &l1_sc[unit];
 197         NDBGL1(L1_PRIM, "unit %d", unit);
 198         isic_next_state(sc, EV_PHAR);
 199         return(0);
 200 }
 201
 202 /*---------------------------------------------------------------------------*
 203  *      command from the upper layers
 204  *---------------------------------------------------------------------------*/
 205 int
 206 isic_mph_command_req(int unit, int command, void *parm)
 207 {
 208         struct l1_softc *sc = &l1_sc[unit];
 209
 210         switch(command)
 211         {
 212                 case CMR_DOPEN:         /* daemon running */
 213                         NDBGL1(L1_PRIM, "unit %d, command = CMR_DOPEN", unit);
 214                         sc->sc_enabled = 1;
 215                         break;
 216
 217                 case CMR_DCLOSE:        /* daemon not running */
 218                         NDBGL1(L1_PRIM, "unit %d, command = CMR_DCLOSE", unit);
 219                         sc->sc_enabled = 0;
 220                         break;
 221
 222                 case CMR_SETTRACE:
 223                         NDBGL1(L1_PRIM, "unit %d, command = CMR_SETTRACE, parm = %d", unit, (unsigned int)parm);
 224                         sc->sc_trace = (unsigned int)parm;
 225                         break;
 226
 227                 case CMR_GCST:
 228                         {
 229                         struct chipstat *cst;
 230                         NDBGL1(L1_PRIM, "unit %d, command = CMR_GCST, parm = %d", unit, (unsigned int)parm);
 231                         cst = (struct chipstat *)parm;
 232                         cst->driver_type = L1DRVR_ISIC;
 233                         cst->stats.hscxstat.unit = sc->sc_unit;
 234                         cst->stats.hscxstat.chan = cst->driver_bchannel;
 235                         cst->stats.hscxstat.vfr = sc->sc_chan[cst->driver_bchannel].stat_VFR;
 236                         cst->stats.hscxstat.rdo = sc->sc_chan[cst->driver_bchannel].stat_RDO;
 237                         cst->stats.hscxstat.crc = sc->sc_chan[cst->driver_bchannel].stat_CRC;
 238                         cst->stats.hscxstat.rab = sc->sc_chan[cst->driver_bchannel].stat_RAB;
 239                         cst->stats.hscxstat.xdu = sc->sc_chan[cst->driver_bchannel].stat_XDU;
 240                         cst->stats.hscxstat.rfo = sc->sc_chan[cst->driver_bchannel].stat_RFO;
 241                         break;
 242                         }
 243                 default:
 244                         NDBGL1(L1_ERROR, "ERROR, unknown command = %d, unit = %d, parm = %d", command, unit, (unsigned int)parm);
 245                         break;
 246         }
 247
 248         return(0);
 249 }