/* * Copyright (c) 1997, 2000 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_l1fsm.c - isdn4bsd layer 1 I.430 state machine * -------------------------------------------------- * * $Id: isic_l1fsm.c,v 1.6 2002/06/04 19:51:18 martin Exp $ * * last edit-date: [Fri Jan 5 11:36:11 2001] * *---------------------------------------------------------------------------*/ #include __KERNEL_RCSID(0, "$NetBSD: isic_l1fsm.c,v 1.6 2002/06/04 19:51:18 martin Exp $"); #include #if defined(__FreeBSD__) && __FreeBSD__ >= 3 #include #else #include #endif #include #include #include #include #ifdef __FreeBSD__ #include #include #else #ifndef __bsdi__ #include #endif #include #endif #include #include #if defined(__NetBSD__) && __NetBSD_Version__ >= 104230000 #include #endif #ifdef __FreeBSD__ #include #include #else #include #include #endif #include #include #include #include #include #include #include #include #if DO_I4B_DEBUG static char *state_text[N_STATES] = { "F3 Deactivated", "F4 Awaiting Signal", "F5 Identifying Input", "F6 Synchronized", "F7 Activated", "F8 Lost Framing", "Illegal State" }; static char *event_text[N_EVENTS] = { "EV_PHAR PH_ACT_REQ", "EV_T3 Timer 3 expired", "EV_INFO0 INFO0 received", "EV_RSY Level Detected", "EV_INFO2 INFO2 received", "EV_INFO48 INFO4 received", "EV_INFO410 INFO4 received", "EV_DR Deactivate Req", "EV_PU Power UP", "EV_DIS Disconnected", "EV_EI Error Ind", "Illegal Event" }; #endif /* Function prototypes */ static void timer3_expired (struct isic_softc *sc); static void T3_start (struct isic_softc *sc); static void T3_stop (struct isic_softc *sc); static void F_T3ex (struct isic_softc *sc); static void timer4_expired (struct isic_softc *sc); static void T4_start (struct isic_softc *sc); static void T4_stop (struct isic_softc *sc); static void F_AI8 (struct isic_softc *sc); static void F_AI10 (struct isic_softc *sc); static void F_I01 (struct isic_softc *sc); static void F_I02 (struct isic_softc *sc); static void F_I03 (struct isic_softc *sc); static void F_I2 (struct isic_softc *sc); static void F_ill (struct isic_softc *sc); static void F_NULL (struct isic_softc *sc); /*---------------------------------------------------------------------------* * I.430 Timer T3 expire function *---------------------------------------------------------------------------*/ static void timer3_expired(struct isic_softc *sc) { if(sc->sc_I430T3) { NDBGL1(L1_T_ERR, "state = %s", isic_printstate(sc)); sc->sc_I430T3 = 0; /* XXX try some recovery here XXX */ isic_recover(sc); sc->sc_init_tries++; /* increment retry count */ /*XXX*/ if(sc->sc_init_tries > 4) { int s = splnet(); sc->sc_init_tries = 0; if(sc->sc_obuf2 != NULL) { i4b_Dfreembuf(sc->sc_obuf2); sc->sc_obuf2 = NULL; } if(sc->sc_obuf != NULL) { i4b_Dfreembuf(sc->sc_obuf); sc->sc_obuf = NULL; sc->sc_freeflag = 0; sc->sc_op = NULL; sc->sc_ol = 0; } splx(s); isdn_layer2_status_ind(&sc->sc_l2, sc->sc_l3token, STI_NOL1ACC, 0); } isic_next_state(sc, EV_T3); } else { NDBGL1(L1_T_ERR, "expired without starting it ...."); } } /*---------------------------------------------------------------------------* * I.430 Timer T3 start *---------------------------------------------------------------------------*/ static void T3_start(struct isic_softc *sc) { NDBGL1(L1_T_MSG, "state = %s", isic_printstate(sc)); sc->sc_I430T3 = 1; START_TIMER(sc->sc_T3_callout, timer3_expired, sc, 2*hz); } /*---------------------------------------------------------------------------* * I.430 Timer T3 stop *---------------------------------------------------------------------------*/ static void T3_stop(struct isic_softc *sc) { NDBGL1(L1_T_MSG, "state = %s", isic_printstate(sc)); sc->sc_init_tries = 0; /* init connect retry count */ if(sc->sc_I430T3) { sc->sc_I430T3 = 0; STOP_TIMER(sc->sc_T3_callout, timer3_expired, sc); } } /*---------------------------------------------------------------------------* * I.430 Timer T3 expiry *---------------------------------------------------------------------------*/ static void F_T3ex(struct isic_softc *sc) { NDBGL1(L1_F_MSG, "FSM function F_T3ex executing"); if(((struct isdn_l3_driver*)sc->sc_l3token)->protocol != PROTOCOL_D64S) isdn_layer2_activate_ind(&sc->sc_l2, sc->sc_l3token, 0); } /*---------------------------------------------------------------------------* * Timer T4 expire function *---------------------------------------------------------------------------*/ static void timer4_expired(struct isic_softc *sc) { if(sc->sc_I430T4) { NDBGL1(L1_T_MSG, "state = %s", isic_printstate(sc)); sc->sc_I430T4 = 0; isdn_layer2_status_ind(&sc->sc_l2, sc->sc_l3token, STI_PDEACT, 0); } else { NDBGL1(L1_T_ERR, "expired without starting it ...."); } } /*---------------------------------------------------------------------------* * Timer T4 start *---------------------------------------------------------------------------*/ static void T4_start(struct isic_softc *sc) { NDBGL1(L1_T_MSG, "state = %s", isic_printstate(sc)); sc->sc_I430T4 = 1; START_TIMER(sc->sc_T4_callout, timer4_expired, sc, hz); } /*---------------------------------------------------------------------------* * Timer T4 stop *---------------------------------------------------------------------------*/ static void T4_stop(struct isic_softc *sc) { NDBGL1(L1_T_MSG, "state = %s", isic_printstate(sc)); if(sc->sc_I430T4) { sc->sc_I430T4 = 0; STOP_TIMER(sc->sc_T4_callout, timer4_expired, sc); } } /*---------------------------------------------------------------------------* * FSM function: received AI8 *---------------------------------------------------------------------------*/ static void F_AI8(struct isic_softc *sc) { T4_stop(sc); NDBGL1(L1_F_MSG, "FSM function F_AI8 executing"); if(((struct isdn_l3_driver*)sc->sc_l3token)->protocol != PROTOCOL_D64S) isdn_layer2_activate_ind(&sc->sc_l2, sc->sc_l3token, 1); T3_stop(sc); if(sc->sc_trace & TRACE_I) { i4b_trace_hdr hdr; char info = INFO4_8; hdr.type = TRC_CH_I; hdr.dir = FROM_NT; hdr.count = 0; isdn_layer2_trace_ind(&sc->sc_l2, sc->sc_l3token, &hdr, 1, &info); } } /*---------------------------------------------------------------------------* * FSM function: received AI10 *---------------------------------------------------------------------------*/ static void F_AI10(struct isic_softc *sc) { T4_stop(sc); NDBGL1(L1_F_MSG, "FSM function F_AI10 executing"); if(((struct isdn_l3_driver*)sc->sc_l3token)->protocol != PROTOCOL_D64S) isdn_layer2_activate_ind(&sc->sc_l2, sc->sc_l3token, 1); T3_stop(sc); if(sc->sc_trace & TRACE_I) { i4b_trace_hdr hdr; char info = INFO4_10; hdr.type = TRC_CH_I; hdr.dir = FROM_NT; hdr.count = 0; isdn_layer2_trace_ind(&sc->sc_l2, sc->sc_l3token, &hdr, 1, &info); } } /*---------------------------------------------------------------------------* * FSM function: received INFO 0 in states F3 .. F5 *---------------------------------------------------------------------------*/ static void F_I01(struct isic_softc *sc) { NDBGL1(L1_F_MSG, "FSM function F_I01 executing"); if(sc->sc_trace & TRACE_I) { i4b_trace_hdr hdr; char info = INFO0; hdr.type = TRC_CH_I; hdr.dir = FROM_NT; hdr.count = 0; isdn_layer2_trace_ind(&sc->sc_l2, sc->sc_l3token, &hdr, 1, &info); } } /*---------------------------------------------------------------------------* * FSM function: received INFO 0 in state F6 *---------------------------------------------------------------------------*/ static void F_I02(struct isic_softc *sc) { NDBGL1(L1_F_MSG, "FSM function F_I02 executing"); if(((struct isdn_l3_driver*)sc->sc_l3token)->protocol != PROTOCOL_D64S) isdn_layer2_activate_ind(&sc->sc_l2, sc->sc_l3token, 0); if(sc->sc_trace & TRACE_I) { i4b_trace_hdr hdr; char info = INFO0; hdr.type = TRC_CH_I; hdr.dir = FROM_NT; hdr.count = 0; isdn_layer2_trace_ind(&sc->sc_l2, sc->sc_l3token, &hdr, 1, &info); } } /*---------------------------------------------------------------------------* * FSM function: received INFO 0 in state F7 or F8 *---------------------------------------------------------------------------*/ static void F_I03(struct isic_softc *sc) { NDBGL1(L1_F_MSG, "FSM function F_I03 executing"); if(((struct isdn_l3_driver*)sc->sc_l3token)->protocol != PROTOCOL_D64S) isdn_layer2_activate_ind(&sc->sc_l2, sc->sc_l3token, 0); T4_start(sc); if(sc->sc_trace & TRACE_I) { i4b_trace_hdr hdr; char info = INFO0; hdr.type = TRC_CH_I; hdr.dir = FROM_NT; hdr.count = 0; isdn_layer2_trace_ind(&sc->sc_l2, sc->sc_l3token, &hdr, 1, &info); } } /*---------------------------------------------------------------------------* * FSM function: activate request *---------------------------------------------------------------------------*/ static void F_AR(struct isic_softc *sc) { NDBGL1(L1_F_MSG, "FSM function F_AR executing"); if(sc->sc_trace & TRACE_I) { i4b_trace_hdr hdr; char info = INFO1_8; hdr.type = TRC_CH_I; hdr.dir = FROM_TE; hdr.count = 0; isdn_layer2_trace_ind(&sc->sc_l2, sc->sc_l3token, &hdr, 1, &info); } isic_isac_l1_cmd(sc, CMD_AR8); T3_start(sc); } /*---------------------------------------------------------------------------* * FSM function: received INFO2 *---------------------------------------------------------------------------*/ static void F_I2(struct isic_softc *sc) { NDBGL1(L1_F_MSG, "FSM function F_I2 executing"); if(sc->sc_trace & TRACE_I) { i4b_trace_hdr hdr; char info = INFO2; hdr.type = TRC_CH_I; hdr.dir = FROM_NT; hdr.count = 0; isdn_layer2_trace_ind(&sc->sc_l2, sc->sc_l3token, &hdr, 1, &info); } } /*---------------------------------------------------------------------------* * illegal state default action *---------------------------------------------------------------------------*/ static void F_ill(struct isic_softc *sc) { NDBGL1(L1_F_ERR, "FSM function F_ill executing"); } /*---------------------------------------------------------------------------* * No action *---------------------------------------------------------------------------*/ static void F_NULL(struct isic_softc *sc) { NDBGL1(L1_F_MSG, "FSM function F_NULL executing"); } /*---------------------------------------------------------------------------* * layer 1 state transition table *---------------------------------------------------------------------------*/ struct isic_state_tab { void (*func) (struct isic_softc *sc); /* function to execute */ int newstate; /* next state */ } isic_state_tab[N_EVENTS][N_STATES] = { /* STATE: F3 F4 F5 F6 F7 F8 ILLEGAL STATE */ /* -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------*/ /* 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}}, /* 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}}, /* 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}}, /* 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}}, /* 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}}, /* 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}}, /* 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}}, /* 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}}, /* 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}}, /* 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}}, /* 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}}, /* 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}} }; /*---------------------------------------------------------------------------* * event handler *---------------------------------------------------------------------------*/ void isic_next_state(struct isic_softc *sc, int event) { int currstate, newstate; 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; } #if DO_I4B_DEBUG /*---------------------------------------------------------------------------* * return pointer to current state description *---------------------------------------------------------------------------*/ char * isic_printstate(struct isic_softc *sc) { return((char *) state_text[sc->sc_I430state]); } #endif