519 lines
15 KiB
C
519 lines
15 KiB
C
/*
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* Copyright (c) 1997, 2000 Hellmuth Michaelis. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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*---------------------------------------------------------------------------
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*
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* i4b_l1fsm.c - isdn4bsd layer 1 I.430 state machine
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* --------------------------------------------------
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*
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* $Id: isic_l1fsm.c,v 1.2 2001/03/24 12:40:30 martin Exp $
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*
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* last edit-date: [Fri Jan 5 11:36:11 2001]
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*
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*---------------------------------------------------------------------------*/
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#include <sys/param.h>
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#if defined(__FreeBSD__) && __FreeBSD__ >= 3
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#include <sys/ioccom.h>
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#else
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#include <sys/ioctl.h>
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#endif
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#include <sys/kernel.h>
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#include <sys/systm.h>
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#include <sys/mbuf.h>
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#include <machine/stdarg.h>
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#ifdef __FreeBSD__
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#include <machine/clock.h>
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#include <i386/isa/isa_device.h>
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#else
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#ifndef __bsdi__
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#include <machine/bus.h>
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#endif
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#include <sys/device.h>
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#endif
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#include <sys/socket.h>
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#include <net/if.h>
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#if defined(__NetBSD__) && __NetBSD_Version__ >= 104230000
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#include <sys/callout.h>
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#endif
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#ifdef __FreeBSD__
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#include <machine/i4b_debug.h>
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#include <machine/i4b_ioctl.h>
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#else
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#include <netisdn/i4b_debug.h>
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#include <netisdn/i4b_ioctl.h>
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#endif
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#include <dev/ic/isic_l1.h>
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#include <dev/ic/isac.h>
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#include <dev/ic/hscx.h>
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#include <netisdn/i4b_global.h>
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#include <netisdn/i4b_trace.h>
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#include <netisdn/i4b_l1l2.h>
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#include <netisdn/i4b_mbuf.h>
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static char *state_text[N_STATES] = {
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"F3 Deactivated",
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"F4 Awaiting Signal",
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"F5 Identifying Input",
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"F6 Synchronized",
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"F7 Activated",
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"F8 Lost Framing",
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"Illegal State"
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};
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static char *event_text[N_EVENTS] = {
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"EV_PHAR PH_ACT_REQ",
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"EV_T3 Timer 3 expired",
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"EV_INFO0 INFO0 received",
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"EV_RSY Level Detected",
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"EV_INFO2 INFO2 received",
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"EV_INFO48 INFO4 received",
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"EV_INFO410 INFO4 received",
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"EV_DR Deactivate Req",
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"EV_PU Power UP",
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"EV_DIS Disconnected",
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"EV_EI Error Ind",
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"Illegal Event"
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};
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/* Function prototypes */
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static void timer3_expired (struct l1_softc *sc);
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static void T3_start (struct l1_softc *sc);
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static void T3_stop (struct l1_softc *sc);
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static void F_T3ex (struct l1_softc *sc);
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static void timer4_expired (struct l1_softc *sc);
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static void T4_start (struct l1_softc *sc);
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static void T4_stop (struct l1_softc *sc);
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static void F_AI8 (struct l1_softc *sc);
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static void F_AI10 (struct l1_softc *sc);
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static void F_I01 (struct l1_softc *sc);
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static void F_I02 (struct l1_softc *sc);
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static void F_I03 (struct l1_softc *sc);
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static void F_I2 (struct l1_softc *sc);
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static void F_ill (struct l1_softc *sc);
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static void F_NULL (struct l1_softc *sc);
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/*---------------------------------------------------------------------------*
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* I.430 Timer T3 expire function
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*---------------------------------------------------------------------------*/
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static void
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timer3_expired(struct l1_softc *sc)
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{
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if(sc->sc_I430T3)
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{
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NDBGL1(L1_T_ERR, "state = %s", isic_printstate(sc));
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sc->sc_I430T3 = 0;
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/* XXX try some recovery here XXX */
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isic_recover(sc);
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sc->sc_init_tries++; /* increment retry count */
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/*XXX*/ if(sc->sc_init_tries > 4)
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{
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int s = splnet();
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sc->sc_init_tries = 0;
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if(sc->sc_obuf2 != NULL)
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{
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i4b_Dfreembuf(sc->sc_obuf2);
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sc->sc_obuf2 = NULL;
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}
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if(sc->sc_obuf != NULL)
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{
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i4b_Dfreembuf(sc->sc_obuf);
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sc->sc_obuf = NULL;
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sc->sc_freeflag = 0;
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sc->sc_op = NULL;
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sc->sc_ol = 0;
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}
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splx(s);
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isdn_layer2_status_ind(sc->sc_l2, STI_NOL1ACC, 0);
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}
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isic_next_state(sc, EV_T3);
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}
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else
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{
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NDBGL1(L1_T_ERR, "expired without starting it ....");
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}
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}
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/*---------------------------------------------------------------------------*
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* I.430 Timer T3 start
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*---------------------------------------------------------------------------*/
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static void
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T3_start(struct l1_softc *sc)
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{
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NDBGL1(L1_T_MSG, "state = %s", isic_printstate(sc));
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sc->sc_I430T3 = 1;
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START_TIMER(sc->sc_T3_callout, timer3_expired, sc, 2*hz);
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}
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/*---------------------------------------------------------------------------*
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* I.430 Timer T3 stop
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*---------------------------------------------------------------------------*/
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static void
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T3_stop(struct l1_softc *sc)
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{
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NDBGL1(L1_T_MSG, "state = %s", isic_printstate(sc));
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sc->sc_init_tries = 0; /* init connect retry count */
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if(sc->sc_I430T3)
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{
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sc->sc_I430T3 = 0;
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STOP_TIMER(sc->sc_T3_callout, timer3_expired, sc);
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}
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}
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/*---------------------------------------------------------------------------*
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* I.430 Timer T3 expiry
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*---------------------------------------------------------------------------*/
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static void
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F_T3ex(struct l1_softc *sc)
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{
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NDBGL1(L1_F_MSG, "FSM function F_T3ex executing");
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if(ctrl_desc[sc->sc_unit].protocol != PROTOCOL_D64S)
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isdn_layer2_activate_ind(sc->sc_l2, 0);
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}
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/*---------------------------------------------------------------------------*
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* Timer T4 expire function
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*---------------------------------------------------------------------------*/
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static void
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timer4_expired(struct l1_softc *sc)
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{
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if(sc->sc_I430T4)
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{
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NDBGL1(L1_T_MSG, "state = %s", isic_printstate(sc));
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sc->sc_I430T4 = 0;
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isdn_layer2_status_ind(sc->sc_l2, STI_PDEACT, 0);
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}
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else
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{
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NDBGL1(L1_T_ERR, "expired without starting it ....");
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}
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}
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/*---------------------------------------------------------------------------*
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* Timer T4 start
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*---------------------------------------------------------------------------*/
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static void
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T4_start(struct l1_softc *sc)
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{
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NDBGL1(L1_T_MSG, "state = %s", isic_printstate(sc));
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sc->sc_I430T4 = 1;
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START_TIMER(sc->sc_T4_callout, timer4_expired, sc, hz);
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}
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/*---------------------------------------------------------------------------*
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* Timer T4 stop
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*---------------------------------------------------------------------------*/
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static void
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T4_stop(struct l1_softc *sc)
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{
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NDBGL1(L1_T_MSG, "state = %s", isic_printstate(sc));
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if(sc->sc_I430T4)
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{
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sc->sc_I430T4 = 0;
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STOP_TIMER(sc->sc_T4_callout, timer4_expired, sc);
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}
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}
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/*---------------------------------------------------------------------------*
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* FSM function: received AI8
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*---------------------------------------------------------------------------*/
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static void
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F_AI8(struct l1_softc *sc)
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{
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T4_stop(sc);
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NDBGL1(L1_F_MSG, "FSM function F_AI8 executing");
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if(ctrl_desc[sc->sc_unit].protocol != PROTOCOL_D64S)
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isdn_layer2_activate_ind(sc->sc_l2, 1);
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T3_stop(sc);
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if(sc->sc_trace & TRACE_I)
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{
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i4b_trace_hdr hdr;
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char info = INFO4_8;
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hdr.type = TRC_CH_I;
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hdr.dir = FROM_NT;
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hdr.count = 0;
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isdn_layer2_trace_ind(sc->sc_l2, &hdr, 1, &info);
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}
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}
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/*---------------------------------------------------------------------------*
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* FSM function: received AI10
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*---------------------------------------------------------------------------*/
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static void
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F_AI10(struct l1_softc *sc)
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{
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T4_stop(sc);
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NDBGL1(L1_F_MSG, "FSM function F_AI10 executing");
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if(ctrl_desc[sc->sc_unit].protocol != PROTOCOL_D64S)
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isdn_layer2_activate_ind(sc->sc_l2, 1);
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T3_stop(sc);
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if(sc->sc_trace & TRACE_I)
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{
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i4b_trace_hdr hdr;
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char info = INFO4_10;
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hdr.type = TRC_CH_I;
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hdr.dir = FROM_NT;
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hdr.count = 0;
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isdn_layer2_trace_ind(sc->sc_l2, &hdr, 1, &info);
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}
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}
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/*---------------------------------------------------------------------------*
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* FSM function: received INFO 0 in states F3 .. F5
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*---------------------------------------------------------------------------*/
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static void
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F_I01(struct l1_softc *sc)
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{
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NDBGL1(L1_F_MSG, "FSM function F_I01 executing");
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if(sc->sc_trace & TRACE_I)
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{
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i4b_trace_hdr hdr;
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char info = INFO0;
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hdr.type = TRC_CH_I;
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hdr.dir = FROM_NT;
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hdr.count = 0;
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isdn_layer2_trace_ind(sc->sc_l2, &hdr, 1, &info);
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}
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}
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/*---------------------------------------------------------------------------*
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* FSM function: received INFO 0 in state F6
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*---------------------------------------------------------------------------*/
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static void
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F_I02(struct l1_softc *sc)
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{
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NDBGL1(L1_F_MSG, "FSM function F_I02 executing");
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if(ctrl_desc[sc->sc_unit].protocol != PROTOCOL_D64S)
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isdn_layer2_activate_ind(sc->sc_l2, 0);
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if(sc->sc_trace & TRACE_I)
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{
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i4b_trace_hdr hdr;
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char info = INFO0;
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hdr.type = TRC_CH_I;
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hdr.dir = FROM_NT;
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hdr.count = 0;
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isdn_layer2_trace_ind(sc->sc_l2, &hdr, 1, &info);
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}
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}
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/*---------------------------------------------------------------------------*
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* FSM function: received INFO 0 in state F7 or F8
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*---------------------------------------------------------------------------*/
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static void
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F_I03(struct l1_softc *sc)
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{
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NDBGL1(L1_F_MSG, "FSM function F_I03 executing");
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if(ctrl_desc[sc->sc_unit].protocol != PROTOCOL_D64S)
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isdn_layer2_activate_ind(sc->sc_l2, 0);
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T4_start(sc);
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if(sc->sc_trace & TRACE_I)
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{
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i4b_trace_hdr hdr;
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char info = INFO0;
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hdr.type = TRC_CH_I;
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hdr.dir = FROM_NT;
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hdr.count = 0;
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isdn_layer2_trace_ind(sc->sc_l2, &hdr, 1, &info);
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}
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}
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/*---------------------------------------------------------------------------*
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* FSM function: activate request
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*---------------------------------------------------------------------------*/
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static void
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F_AR(struct l1_softc *sc)
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{
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NDBGL1(L1_F_MSG, "FSM function F_AR executing");
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if(sc->sc_trace & TRACE_I)
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{
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i4b_trace_hdr hdr;
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char info = INFO1_8;
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hdr.type = TRC_CH_I;
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hdr.dir = FROM_TE;
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hdr.count = 0;
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isdn_layer2_trace_ind(sc->sc_l2, &hdr, 1, &info);
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}
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isic_isac_l1_cmd(sc, CMD_AR8);
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T3_start(sc);
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}
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/*---------------------------------------------------------------------------*
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* FSM function: received INFO2
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*---------------------------------------------------------------------------*/
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static void
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F_I2(struct l1_softc *sc)
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{
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NDBGL1(L1_F_MSG, "FSM function F_I2 executing");
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if(sc->sc_trace & TRACE_I)
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{
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i4b_trace_hdr hdr;
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char info = INFO2;
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hdr.type = TRC_CH_I;
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hdr.dir = FROM_NT;
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hdr.count = 0;
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isdn_layer2_trace_ind(sc->sc_l2, &hdr, 1, &info);
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}
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}
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/*---------------------------------------------------------------------------*
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* illegal state default action
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*---------------------------------------------------------------------------*/
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static void
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F_ill(struct l1_softc *sc)
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{
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NDBGL1(L1_F_ERR, "FSM function F_ill executing");
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}
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/*---------------------------------------------------------------------------*
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* No action
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*---------------------------------------------------------------------------*/
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static void
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F_NULL(struct l1_softc *sc)
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{
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NDBGL1(L1_F_MSG, "FSM function F_NULL executing");
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}
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/*---------------------------------------------------------------------------*
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* layer 1 state transition table
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*---------------------------------------------------------------------------*/
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struct isic_state_tab {
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void (*func) (struct l1_softc *sc); /* function to execute */
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int newstate; /* next state */
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} isic_state_tab[N_EVENTS][N_STATES] = {
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/* STATE: F3 F4 F5 F6 F7 F8 ILLEGAL STATE */
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/* -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------*/
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/* EV_PHAR x*/ {{F_AR, ST_F4}, {F_NULL, ST_F4}, {F_NULL, ST_F5}, {F_NULL, ST_F6}, {F_ill, ST_ILL}, {F_NULL, ST_F8}, {F_ill, ST_ILL}},
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/* EV_T3 x*/ {{F_NULL, ST_F3}, {F_T3ex, ST_F3}, {F_T3ex, ST_F3}, {F_T3ex, ST_F3}, {F_NULL, ST_F7}, {F_NULL, ST_F8}, {F_ill, ST_ILL}},
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/* EV_INFO0 */ {{F_I01, ST_F3}, {F_I01, ST_F4}, {F_I01, ST_F5}, {F_I02, ST_F3}, {F_I03, ST_F3}, {F_I03, ST_F3}, {F_ill, ST_ILL}},
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/* EV_RSY x*/ {{F_NULL, ST_F3}, {F_NULL, ST_F5}, {F_NULL, ST_F5}, {F_NULL, ST_F8}, {F_NULL, ST_F8}, {F_NULL, ST_F8}, {F_ill, ST_ILL}},
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/* EV_INFO2 */ {{F_I2, ST_F6}, {F_I2, ST_F6}, {F_I2, ST_F6}, {F_I2, ST_F6}, {F_I2, ST_F6}, {F_I2, ST_F6}, {F_ill, ST_ILL}},
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/* EV_INFO48*/ {{F_AI8, ST_F7}, {F_AI8, ST_F7}, {F_AI8, ST_F7}, {F_AI8, ST_F7}, {F_NULL, ST_F7}, {F_AI8, ST_F7}, {F_ill, ST_ILL}},
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/* EV_INFO41*/ {{F_AI10, ST_F7}, {F_AI10, ST_F7}, {F_AI10, ST_F7}, {F_AI10, ST_F7}, {F_NULL, ST_F7}, {F_AI10, ST_F7}, {F_ill, ST_ILL}},
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/* EV_DR */ {{F_NULL, ST_F3}, {F_NULL, ST_F4}, {F_NULL, ST_F5}, {F_NULL, ST_F6}, {F_NULL, ST_F7}, {F_NULL, ST_F8}, {F_ill, ST_ILL}},
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/* EV_PU */ {{F_NULL, ST_F3}, {F_NULL, ST_F4}, {F_NULL, ST_F5}, {F_NULL, ST_F6}, {F_NULL, ST_F7}, {F_NULL, ST_F8}, {F_ill, ST_ILL}},
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/* EV_DIS */ {{F_ill, ST_ILL}, {F_ill, ST_ILL}, {F_ill, ST_ILL}, {F_ill, ST_ILL}, {F_ill, ST_ILL}, {F_ill, ST_ILL}, {F_ill, ST_ILL}},
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/* EV_EI */ {{F_NULL, ST_F3}, {F_NULL, ST_F3}, {F_NULL, ST_F3}, {F_NULL, ST_F3}, {F_NULL, ST_F3}, {F_NULL, ST_F3}, {F_ill, ST_ILL}},
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/* EV_ILL */ {{F_ill, ST_ILL}, {F_ill, ST_ILL}, {F_ill, ST_ILL}, {F_ill, ST_ILL}, {F_ill, ST_ILL}, {F_ill, ST_ILL}, {F_ill, ST_ILL}}
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};
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/*---------------------------------------------------------------------------*
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* event handler
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*---------------------------------------------------------------------------*/
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void
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isic_next_state(struct l1_softc *sc, int event)
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{
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int currstate, newstate;
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if(event >= N_EVENTS)
|
|
panic("i4b_l1fsm.c: event >= N_EVENTS\n");
|
|
|
|
currstate = sc->sc_I430state;
|
|
|
|
if(currstate >= N_STATES)
|
|
panic("i4b_l1fsm.c: currstate >= N_STATES\n");
|
|
|
|
newstate = isic_state_tab[event][currstate].newstate;
|
|
|
|
if(newstate >= N_STATES)
|
|
panic("i4b_l1fsm.c: newstate >= N_STATES\n");
|
|
|
|
NDBGL1(L1_F_MSG, "FSM event [%s]: [%s => %s]", event_text[event],
|
|
state_text[currstate],
|
|
state_text[newstate]);
|
|
|
|
(*isic_state_tab[event][currstate].func)(sc);
|
|
|
|
if(newstate == ST_ILL)
|
|
{
|
|
newstate = ST_F3;
|
|
NDBGL1(L1_F_ERR, "FSM Illegal State ERROR, oldstate = %s, newstate = %s, event = %s!",
|
|
state_text[currstate],
|
|
state_text[newstate],
|
|
event_text[event]);
|
|
}
|
|
|
|
sc->sc_I430state = newstate;
|
|
}
|
|
|
|
/*---------------------------------------------------------------------------*
|
|
* return pointer to current state description
|
|
*---------------------------------------------------------------------------*/
|
|
char *
|
|
isic_printstate(struct l1_softc *sc)
|
|
{
|
|
return((char *) state_text[sc->sc_I430state]);
|
|
}
|
|
|