sys/i4b/layer1/ifpnp/i4b_ifpnp_l1.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  *
  28  *      i4b_ifpnp_l1.c - AVM Fritz PnP layer 1 handler
  29  *      ----------------------------------------------
  30  *      $Id: i4b_ifpnp_l1.c,v 1.4 2000/06/02 16:14:36 hm Exp $
  31  *      $Ust: src/i4b/layer1-nb/ifpnp/i4b_ifpnp_l1.c,v 1.4 2000/04/18 08:03:05 ust Exp $
  32  *      last edit-date: [Fri Jun  2 14:55:49 2000]
  33  *
  34  *---------------------------------------------------------------------------*/
  35
  36 #include <sys/cdefs.h>
  37 __FBSDID("$FreeBSD$");
  38
  39 #include <sys/param.h>
  40 #include <sys/systm.h>
  41 #include <sys/mbuf.h>
  42 #include <sys/socket.h>
  43
  44 #include <net/if.h>
  45
  46 #include <i4b/include/i4b_debug.h>
  47 #include <i4b/include/i4b_ioctl.h>
  48 #include <i4b/include/i4b_trace.h>
  49
  50 #include <i4b/layer1/isic/i4b_isic.h>
  51 #include <i4b/layer1/isic/i4b_isac.h>
  52
  53 #include <i4b/layer1/ifpnp/i4b_ifpnp_ext.h>
  54
  55 #include <i4b/layer1/i4b_l1.h>
  56
  57 #include <i4b/include/i4b_mbuf.h>
  58 #include <i4b/include/i4b_global.h>
  59
  60 /*---------------------------------------------------------------------------*
  61  *
  62  *      L2 -> L1: PH-DATA-REQUEST
  63  *      =========================
  64  *
  65  *      parms:
  66  *              unit            physical interface unit number
  67  *              m               mbuf containing L2 frame to be sent out
  68  *              freeflag        MBUF_FREE: free mbuf here after having sent
  69  *                                              it out
  70  *                              MBUF_DONTFREE: mbuf is freed by Layer 2
  71  *      returns:
  72  *              ==0     fail, nothing sent out
  73  *              !=0     ok, frame sent out
  74  *
  75  *---------------------------------------------------------------------------*/
  76 int
  77 ifpnp_ph_data_req(int unit, struct mbuf *m, int freeflag)
  78 {
  79         u_char cmd;
  80         int s;
  81         struct l1_softc *sc = ifpnp_scp[unit];
  82
  83 #ifdef NOTDEF
  84         NDBGL1(L1_PRIM, "PH-DATA-REQ, unit %d, freeflag=%d", unit, freeflag);
  85 #endif
  86
  87         if(m == NULL)                   /* failsafe */
  88                 return (0);
  89
  90         s = SPLI4B();
  91
  92         if(sc->sc_I430state == ST_F3)   /* layer 1 not running ? */
  93         {
  94                 NDBGL1(L1_I_ERR, "still in state F3!");
  95                 ifpnp_ph_activate_req(unit);
  96         }
  97
  98         if(sc->sc_state & ISAC_TX_ACTIVE)
  99         {
 100                 if(sc->sc_obuf2 == NULL)
 101                 {
 102                         sc->sc_obuf2 = m;               /* save mbuf ptr */
 103
 104                         if(freeflag)
 105                                 sc->sc_freeflag2 = 1;   /* IRQ must mfree */
 106                         else
 107                                 sc->sc_freeflag2 = 0;   /* IRQ must not mfree */
 108
 109                         NDBGL1(L1_I_MSG, "using 2nd ISAC TX buffer, state = %s", ifpnp_printstate(sc));
 110
 111                         if(sc->sc_trace & TRACE_D_TX)
 112                         {
 113                                 i4b_trace_hdr_t hdr;
 114                                 hdr.unit = L0IFPNPUNIT(unit);
 115                                 hdr.type = TRC_CH_D;
 116                                 hdr.dir = FROM_TE;
 117                                 hdr.count = ++sc->sc_trace_dcount;
 118                                 MICROTIME(hdr.time);
 119                                 i4b_l1_trace_ind(&hdr, m->m_len, m->m_data);
 120                         }
 121                         splx(s);
 122                         return(1);
 123                 }
 124
 125                 NDBGL1(L1_I_ERR, "No Space in TX FIFO, state = %s", ifpnp_printstate(sc));
 126
 127                 if(freeflag == MBUF_FREE)
 128                         i4b_Dfreembuf(m);
 129
 130                 splx(s);
 131                 return (0);
 132         }
 133
 134         if(sc->sc_trace & TRACE_D_TX)
 135         {
 136                 i4b_trace_hdr_t hdr;
 137                 hdr.unit = L0IFPNPUNIT(unit);
 138                 hdr.type = TRC_CH_D;
 139                 hdr.dir = FROM_TE;
 140                 hdr.count = ++sc->sc_trace_dcount;
 141                 MICROTIME(hdr.time);
 142                 i4b_l1_trace_ind(&hdr, m->m_len, m->m_data);
 143         }
 144
 145         sc->sc_state |= ISAC_TX_ACTIVE; /* set transmitter busy flag */
 146
 147         NDBGL1(L1_I_MSG, "ISAC_TX_ACTIVE set");
 148
 149         sc->sc_freeflag = 0;            /* IRQ must NOT mfree */
 150
 151         ISAC_WRFIFO(m->m_data, min(m->m_len, ISAC_FIFO_LEN)); /* output to TX fifo */
 152
 153         if(m->m_len > ISAC_FIFO_LEN)    /* message > 32 bytes ? */
 154         {
 155                 sc->sc_obuf = m;        /* save mbuf ptr */
 156                 sc->sc_op = m->m_data + ISAC_FIFO_LEN;  /* ptr for irq hdl */
 157                 sc->sc_ol = m->m_len - ISAC_FIFO_LEN;   /* length for irq hdl */
 158
 159                 if(freeflag)
 160                         sc->sc_freeflag = 1;    /* IRQ must mfree */
 161
 162                 cmd = ISAC_CMDR_XTF;
 163         }
 164         else
 165         {
 166                 sc->sc_obuf = NULL;
 167                 sc->sc_op = NULL;
 168                 sc->sc_ol = 0;
 169
 170                 if(freeflag)
 171                         i4b_Dfreembuf(m);
 172
 173                 cmd = ISAC_CMDR_XTF | ISAC_CMDR_XME;
 174         }
 175
 176         ISAC_WRITE(I_CMDR, cmd);
 177         ISACCMDRWRDELAY();
 178
 179         splx(s);
 180
 181         return(1);
 182 }
 183
 184 /*---------------------------------------------------------------------------*
 185  *
 186  *      L2 -> L1: PH-ACTIVATE-REQUEST
 187  *      =============================
 188  *
 189  *      parms:
 190  *              unit    physical interface unit number
 191  *
 192  *      returns:
 193  *              ==0
 194  *              !=0
 195  *
 196  *---------------------------------------------------------------------------*/
 197 int
 198 ifpnp_ph_activate_req(int unit)
 199 {
 200         struct l1_softc *sc = ifpnp_scp[unit];
 201         NDBGL1(L1_PRIM, "PH-ACTIVATE-REQ, unit %d\n", unit);
 202         ifpnp_next_state(sc, EV_PHAR);
 203         return(0);
 204 }
 205
 206 /*---------------------------------------------------------------------------*
 207  *      command from the upper layers
 208  *---------------------------------------------------------------------------*/
 209 int
 210 ifpnp_mph_command_req(int unit, int command, void *parm)
 211 {
 212         struct l1_softc *sc = ifpnp_scp[unit];
 213
 214         switch(command)
 215         {
 216                 case CMR_DOPEN:         /* daemon running */
 217                         NDBGL1(L1_PRIM, "unit %d, command = CMR_DOPEN", unit);
 218                         sc->sc_enabled = 1;
 219                         break;
 220
 221                 case CMR_DCLOSE:        /* daemon not running */
 222                         NDBGL1(L1_PRIM, "unit %d, command = CMR_DCLOSE", unit);
 223                         sc->sc_enabled = 0;
 224                         break;
 225
 226                 case CMR_SETTRACE:
 227                         NDBGL1(L1_PRIM, "unit %d, command = CMR_SETTRACE, parm = %d", unit, (unsigned int)parm);
 228                         sc->sc_trace = (unsigned int)parm;
 229                         break;
 230
 231                 default:
 232                         NDBGL1(L1_ERROR, "ERROR, unknown command = %d, unit = %d, parm = %d", command, unit, (unsigned int)parm);
 233                         break;
 234         }
 235
 236         return(0);
 237 }