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