/* * Copyright (c) 1997, 2001 Hellmuth Michaelis. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * *--------------------------------------------------------------------------- * * i4b_itjc_l1.c - NetJet-S layer 1 handler * --------------------------------------------- * last edit-date: [Wed Jan 10 17:16:19 2001] * *---------------------------------------------------------------------------*/ #include __FBSDID("$FreeBSD$"); #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include /*---------------------------------------------------------------------------* * * L2 -> L1: PH-DATA-REQUEST * ========================= * * parms: * unit physical interface unit number * m mbuf containing L2 frame to be sent out * freeflag MBUF_FREE: free mbuf here after having sent * it out * MBUF_DONTFREE: mbuf is freed by Layer 2 * returns: * ==0 fail, nothing sent out * !=0 ok, frame sent out * *---------------------------------------------------------------------------*/ int itjc_ph_data_req(int unit, struct mbuf *m, int freeflag) { u_char cmd; int s; struct l1_softc *sc = itjc_scp[unit]; NDBGL1(L1_PRIM, "PH-DATA-REQ, unit %d, freeflag=%d", unit, freeflag); if(m == NULL) /* failsafe */ return (0); s = SPLI4B(); if(sc->sc_I430state == ST_F3) /* layer 1 not running ? */ { NDBGL1(L1_I_ERR, "still in state F3!"); itjc_ph_activate_req(unit); } if(sc->sc_state & ISAC_TX_ACTIVE) { if(sc->sc_obuf2 == NULL) { sc->sc_obuf2 = m; /* save mbuf ptr */ if(freeflag) sc->sc_freeflag2 = 1; /* IRQ must mfree */ else sc->sc_freeflag2 = 0; /* IRQ must not mfree */ NDBGL1(L1_I_MSG, "using 2nd ISAC TX buffer, state = %s", itjc_printstate(sc)); if(sc->sc_trace & TRACE_D_TX) { i4b_trace_hdr_t hdr; hdr.unit = L0ITJCUNIT(unit); hdr.type = TRC_CH_D; hdr.dir = FROM_TE; hdr.count = ++sc->sc_trace_dcount; MICROTIME(hdr.time); i4b_l1_trace_ind(&hdr, m->m_len, m->m_data); } splx(s); return(1); } NDBGL1(L1_I_ERR, "No Space in TX FIFO, state = %s", itjc_printstate(sc)); if(freeflag == MBUF_FREE) i4b_Dfreembuf(m); splx(s); return (0); } if(sc->sc_trace & TRACE_D_TX) { i4b_trace_hdr_t hdr; hdr.unit = L0ITJCUNIT(unit); hdr.type = TRC_CH_D; hdr.dir = FROM_TE; hdr.count = ++sc->sc_trace_dcount; MICROTIME(hdr.time); i4b_l1_trace_ind(&hdr, m->m_len, m->m_data); } sc->sc_state |= ISAC_TX_ACTIVE; /* set transmitter busy flag */ NDBGL1(L1_I_MSG, "ISAC_TX_ACTIVE set"); sc->sc_freeflag = 0; /* IRQ must NOT mfree */ ISAC_WRFIFO(m->m_data, min(m->m_len, ISAC_FIFO_LEN)); /* output to TX fifo */ if(m->m_len > ISAC_FIFO_LEN) /* message > 32 bytes ? */ { sc->sc_obuf = m; /* save mbuf ptr */ sc->sc_op = m->m_data + ISAC_FIFO_LEN; /* ptr for irq hdl */ sc->sc_ol = m->m_len - ISAC_FIFO_LEN; /* length for irq hdl */ if(freeflag) sc->sc_freeflag = 1; /* IRQ must mfree */ cmd = ISAC_CMDR_XTF; } else { sc->sc_obuf = NULL; sc->sc_op = NULL; sc->sc_ol = 0; if(freeflag) i4b_Dfreembuf(m); cmd = ISAC_CMDR_XTF | ISAC_CMDR_XME; } ISAC_WRITE(I_CMDR, cmd); ISACCMDRWRDELAY(); splx(s); return(1); } /*---------------------------------------------------------------------------* * * L2 -> L1: PH-ACTIVATE-REQUEST * ============================= * * parms: * unit physical interface unit number * * returns: * ==0 * !=0 * *---------------------------------------------------------------------------*/ int itjc_ph_activate_req(int unit) { struct l1_softc *sc = itjc_scp[unit]; NDBGL1(L1_PRIM, "PH-ACTIVATE-REQ, unit %d", unit); itjc_next_state(sc, EV_PHAR); return(0); } /*---------------------------------------------------------------------------* * command from the upper layers *---------------------------------------------------------------------------*/ int itjc_mph_command_req(int unit, int command, void *parm) { struct l1_softc *sc = itjc_scp[unit]; switch(command) { case CMR_DOPEN: /* daemon running */ NDBGL1(L1_PRIM, "unit %d, command = CMR_DOPEN", unit); sc->sc_enabled = 1; break; case CMR_DCLOSE: /* daemon not running */ NDBGL1(L1_PRIM, "unit %d, command = CMR_DCLOSE", unit); sc->sc_enabled = 0; break; case CMR_SETTRACE: NDBGL1(L1_PRIM, "unit %d, command = CMR_SETTRACE, parm = %d", unit, (unsigned int)parm); sc->sc_trace = (unsigned int)parm; break; default: NDBGL1(L1_ERROR, "ERROR, unknown command = %d, unit = %d, parm = %d", command, unit, (unsigned int)parm); break; } return(0); }