sys/net/i4b/layer1/itjc/i4b_itjc_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  *      i4b_itjc_l1.c - NetJet-S layer 1 handler
  28  *      ---------------------------------------------
  29  *
  30  * $FreeBSD: src/sys/i4b/layer1/itjc/i4b_itjc_l1.c,v 1.1.2.1 2001/08/10 14:08:39 obrien Exp $
  31  * $DragonFly: src/sys/net/i4b/layer1/itjc/i4b_itjc_l1.c,v 1.2 2003/06/17 04:28:40 dillon Exp $
  32  *
  33  *      last edit-date: [Wed Jan 10 17:16:19 2001]
  34  *
  35  *---------------------------------------------------------------------------*/
  36
  37 #include "itjc.h"
  38 #include "pci.h"
  39
  40 #if (NITJC > 0) && (NPCI > 0)
  41
  42 #include <sys/param.h>
  43 #include <sys/kernel.h>
  44 #include <sys/systm.h>
  45 #include <sys/mbuf.h>
  46 #include <sys/socket.h>
  47
  48 #include <machine/stdarg.h>
  49 #include <machine/clock.h>
  50
  51 #include <net/if.h>
  52
  53 #include <machine/i4b_debug.h>
  54 #include <machine/i4b_ioctl.h>
  55 #include <machine/i4b_trace.h>
  56
  57 #include <i4b/layer1/isic/i4b_isic.h>
  58 #include <i4b/layer1/isic/i4b_isac.h>
  59
  60 #include <i4b/layer1/itjc/i4b_itjc_ext.h>
  61
  62 #include <i4b/layer1/i4b_l1.h>
  63
  64 #include <i4b/include/i4b_mbuf.h>
  65 #include <i4b/include/i4b_global.h>
  66
  67 /*---------------------------------------------------------------------------*
  68  *
  69  *      L2 -> L1: PH-DATA-REQUEST
  70  *      =========================
  71  *
  72  *      parms:
  73  *              unit            physical interface unit number
  74  *              m               mbuf containing L2 frame to be sent out
  75  *              freeflag        MBUF_FREE: free mbuf here after having sent
  76  *                                              it out
  77  *                              MBUF_DONTFREE: mbuf is freed by Layer 2
  78  *      returns:
  79  *              ==0     fail, nothing sent out
  80  *              !=0     ok, frame sent out
  81  *
  82  *---------------------------------------------------------------------------*/
  83 int
  84 itjc_ph_data_req(int unit, struct mbuf *m, int freeflag)
  85 {
  86         u_char cmd;
  87         int s;
  88         struct l1_softc *sc = itjc_scp[unit];
  89
  90         NDBGL1(L1_PRIM, "PH-DATA-REQ, unit %d, freeflag=%d", unit, freeflag);
  91
  92         if(m == NULL)                   /* failsafe */
  93                 return (0);
  94
  95         s = SPLI4B();
  96
  97         if(sc->sc_I430state == ST_F3)   /* layer 1 not running ? */
  98         {
  99                 NDBGL1(L1_I_ERR, "still in state F3!");
 100                 itjc_ph_activate_req(unit);
 101         }
 102
 103         if(sc->sc_state & ISAC_TX_ACTIVE)
 104         {
 105                 if(sc->sc_obuf2 == NULL)
 106                 {
 107                         sc->sc_obuf2 = m;               /* save mbuf ptr */
 108
 109                         if(freeflag)
 110                                 sc->sc_freeflag2 = 1;   /* IRQ must mfree */
 111                         else
 112                                 sc->sc_freeflag2 = 0;   /* IRQ must not mfree */
 113
 114                         NDBGL1(L1_I_MSG, "using 2nd ISAC TX buffer, state = %s", itjc_printstate(sc));
 115
 116                         if(sc->sc_trace & TRACE_D_TX)
 117                         {
 118                                 i4b_trace_hdr_t hdr;
 119                                 hdr.unit = L0ITJCUNIT(unit);
 120                                 hdr.type = TRC_CH_D;
 121                                 hdr.dir = FROM_TE;
 122                                 hdr.count = ++sc->sc_trace_dcount;
 123                                 MICROTIME(hdr.time);
 124                                 i4b_l1_trace_ind(&hdr, m->m_len, m->m_data);
 125                         }
 126                         splx(s);
 127                         return(1);
 128                 }
 129
 130                 NDBGL1(L1_I_ERR, "No Space in TX FIFO, state = %s", itjc_printstate(sc));
 131
 132                 if(freeflag == MBUF_FREE)
 133                         i4b_Dfreembuf(m);
 134
 135                 splx(s);
 136                 return (0);
 137         }
 138
 139         if(sc->sc_trace & TRACE_D_TX)
 140         {
 141                 i4b_trace_hdr_t hdr;
 142                 hdr.unit = L0ITJCUNIT(unit);
 143                 hdr.type = TRC_CH_D;
 144                 hdr.dir = FROM_TE;
 145                 hdr.count = ++sc->sc_trace_dcount;
 146                 MICROTIME(hdr.time);
 147                 i4b_l1_trace_ind(&hdr, m->m_len, m->m_data);
 148         }
 149
 150         sc->sc_state |= ISAC_TX_ACTIVE; /* set transmitter busy flag */
 151
 152         NDBGL1(L1_I_MSG, "ISAC_TX_ACTIVE set");
 153
 154         sc->sc_freeflag = 0;            /* IRQ must NOT mfree */
 155
 156         ISAC_WRFIFO(m->m_data, min(m->m_len, ISAC_FIFO_LEN)); /* output to TX fifo */
 157
 158         if(m->m_len > ISAC_FIFO_LEN)    /* message > 32 bytes ? */
 159         {
 160                 sc->sc_obuf = m;        /* save mbuf ptr */
 161                 sc->sc_op = m->m_data + ISAC_FIFO_LEN;  /* ptr for irq hdl */
 162                 sc->sc_ol = m->m_len - ISAC_FIFO_LEN;   /* length for irq hdl */
 163
 164                 if(freeflag)
 165                         sc->sc_freeflag = 1;    /* IRQ must mfree */
 166
 167                 cmd = ISAC_CMDR_XTF;
 168         }
 169         else
 170         {
 171                 sc->sc_obuf = NULL;
 172                 sc->sc_op = NULL;
 173                 sc->sc_ol = 0;
 174
 175                 if(freeflag)
 176                         i4b_Dfreembuf(m);
 177
 178                 cmd = ISAC_CMDR_XTF | ISAC_CMDR_XME;
 179         }
 180
 181         ISAC_WRITE(I_CMDR, cmd);
 182         ISACCMDRWRDELAY();
 183
 184         splx(s);
 185
 186         return(1);
 187 }
 188
 189 /*---------------------------------------------------------------------------*
 190  *
 191  *      L2 -> L1: PH-ACTIVATE-REQUEST
 192  *      =============================
 193  *
 194  *      parms:
 195  *              unit    physical interface unit number
 196  *
 197  *      returns:
 198  *              ==0
 199  *              !=0
 200  *
 201  *---------------------------------------------------------------------------*/
 202 int
 203 itjc_ph_activate_req(int unit)
 204 {
 205         struct l1_softc *sc = itjc_scp[unit];
 206         NDBGL1(L1_PRIM, "PH-ACTIVATE-REQ, unit %d", unit);
 207         itjc_next_state(sc, EV_PHAR);
 208         return(0);
 209 }
 210
 211 /*---------------------------------------------------------------------------*
 212  *      command from the upper layers
 213  *---------------------------------------------------------------------------*/
 214 int
 215 itjc_mph_command_req(int unit, int command, void *parm)
 216 {
 217         struct l1_softc *sc = itjc_scp[unit];
 218
 219         switch(command)
 220         {
 221                 case CMR_DOPEN:         /* daemon running */
 222                         NDBGL1(L1_PRIM, "unit %d, command = CMR_DOPEN", unit);
 223                         sc->sc_enabled = 1;
 224                         break;
 225
 226                 case CMR_DCLOSE:        /* daemon not running */
 227                         NDBGL1(L1_PRIM, "unit %d, command = CMR_DCLOSE", unit);
 228                         sc->sc_enabled = 0;
 229                         break;
 230
 231                 case CMR_SETTRACE:
 232                         NDBGL1(L1_PRIM, "unit %d, command = CMR_SETTRACE, parm = %d", unit, (unsigned int)parm);
 233                         sc->sc_trace = (unsigned int)parm;
 234                         break;
 235
 236                 default:
 237                         NDBGL1(L1_ERROR, "ERROR, unknown command = %d, unit = %d, parm = %d", command, unit, (unsigned int)parm);
 238                         break;
 239         }
 240
 241         return(0);
 242 }
 243
 244 #endif /* NITJC > 0 */