/* * Copyright (c) 1997, 1999 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_l1.c - isdn4bsd layer 1 handler * ----------------------------------- * * $Id: i4b_l1.c,v 1.2 1999/12/13 21:25:26 hm Exp $ * * $FreeBSD$ * * last edit-date: [Mon Dec 13 22:01:55 1999] * *---------------------------------------------------------------------------*/ #include "isic.h" #if NISIC > 0 #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include unsigned int i4b_l1_debug = L1_DEBUG_DEFAULT; static int ph_data_req(int, struct mbuf *, int); static int ph_activate_req(int); /* from i4btrc driver i4b_trace.c */ extern int get_trace_data_from_l1(int unit, int what, int len, char *buf); /* from layer 2 */ extern int i4b_ph_data_ind(int unit, struct mbuf *m); extern int i4b_ph_activate_ind(int unit); extern int i4b_ph_deactivate_ind(int unit); extern int i4b_mph_attach_ind(int unit); extern int i4b_mph_status_ind(int, int, int); /* layer 1 lme */ static int i4b_mph_command_req(int, int, int); /* jump table */ struct i4b_l1l2_func i4b_l1l2_func = { /* Layer 1 --> Layer 2 */ (int (*)(int, struct mbuf *)) i4b_ph_data_ind, (int (*)(int)) i4b_ph_activate_ind, (int (*)(int)) i4b_ph_deactivate_ind, /* Layer 2 --> Layer 1 */ (int (*)(int, struct mbuf *, int)) ph_data_req, (int (*)(int)) ph_activate_req, /* Layer 1 --> upstream, ISDN trace data */ (int (*)(i4b_trace_hdr_t *, int, u_char *)) get_trace_data_from_l1, /* Driver control and status information */ (int (*)(int, int, int)) i4b_mph_status_ind, (int (*)(int, int, int)) i4b_mph_command_req, }; /*---------------------------------------------------------------------------* * * 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 * *---------------------------------------------------------------------------*/ static int ph_data_req(int unit, struct mbuf *m, int freeflag) { u_char cmd; int s; struct l1_softc *sc = &l1_sc[unit]; #ifdef NOTDEF DBGL1(L1_PRIM, "PH-DATA-REQ", ("unit %d, freeflag=%d\n", unit, freeflag)); #endif if(m == NULL) /* failsafe */ return (0); s = SPLI4B(); if(sc->sc_I430state == ST_F3) /* layer 1 not running ? */ { DBGL1(L1_I_ERR, "ph_data_req", ("still in state F3!\n")); 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 */ DBGL1(L1_I_MSG, "ph_data_req", ("using 2nd ISAC TX buffer, state = %s\n", isic_printstate(sc))); if(sc->sc_trace & TRACE_D_TX) { i4b_trace_hdr_t hdr; hdr.unit = unit; hdr.type = TRC_CH_D; hdr.dir = FROM_TE; hdr.count = ++sc->sc_trace_dcount; MICROTIME(hdr.time); MPH_Trace_Ind(&hdr, m->m_len, m->m_data); } splx(s); return(1); } DBGL1(L1_I_ERR, "ph_data_req", ("No Space in TX FIFO, state = %s\n", isic_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 = unit; hdr.type = TRC_CH_D; hdr.dir = FROM_TE; hdr.count = ++sc->sc_trace_dcount; MICROTIME(hdr.time); MPH_Trace_Ind(&hdr, m->m_len, m->m_data); } sc->sc_state |= ISAC_TX_ACTIVE; /* set transmitter busy flag */ DBGL1(L1_I_MSG, "ph_data_req", ("ISAC_TX_ACTIVE set\n")); 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 * *---------------------------------------------------------------------------*/ static int ph_activate_req(int unit) { struct l1_softc *sc = &l1_sc[unit]; DBGL1(L1_PRIM, "PH-ACTIVATE-REQ", ("unit %d\n", unit)); isic_next_state(sc, EV_PHAR); return(0); } /*---------------------------------------------------------------------------* * command from the upper layers *---------------------------------------------------------------------------*/ static int i4b_mph_command_req(int unit, int command, int parm) { struct l1_softc *sc = &l1_sc[unit]; switch(command) { case CMR_DOPEN: /* daemon running */ DBGL1(L1_PRIM, "MPH-COMMAND-REQ", ("unit %d, command = CMR_DOPEN\n", unit)); sc->sc_enabled = 1; break; case CMR_DCLOSE: /* daemon not running */ DBGL1(L1_PRIM, "MPH-COMMAND-REQ", ("unit %d, command = CMR_DCLOSE\n", unit)); sc->sc_enabled = 0; break; default: DBGL1(L1_ERROR, "i4b_mph_command_req", ("ERROR, unknown command = %d, unit = %d, parm = %d\n", command, unit, parm)); break; } return(0); } #endif /* NISIC > 0 */