316 lines
7.9 KiB
C
316 lines
7.9 KiB
C
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/*
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* Copyright (c) 1997, 1998 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_l1.c - isdn4bsd layer 1 handler
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* -----------------------------------
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*
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* $Id: i4b_l1.c,v 1.27 1998/12/05 18:04:51 hm Exp $
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*
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* last edit-date: [Sat Dec 5 18:24:52 1998]
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*
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*---------------------------------------------------------------------------*/
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#ifdef __FreeBSD__
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#include "isic.h"
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#else
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#define NISIC 1 /* don't bother */
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#endif
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#if NISIC > 0
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#include <sys/param.h>
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#if defined(__FreeBSD_version) && __FreeBSD_version >= 300001
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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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#include <machine/bus.h>
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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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#ifdef __FreeBSD__
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#include <machine/i4b_debug.h>
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#include <machine/i4b_ioctl.h>
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#include <machine/i4b_trace.h>
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#else
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#include <i4b/i4b_debug.h>
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#include <i4b/i4b_ioctl.h>
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#include <i4b/i4b_trace.h>
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#endif
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#include <i4b/layer1/i4b_l1.h>
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#include <i4b/layer1/i4b_isac.h>
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#include <i4b/layer1/i4b_hscx.h>
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#include <i4b/include/i4b_l1l2.h>
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#include <i4b/include/i4b_mbuf.h>
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#include <i4b/include/i4b_global.h>
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unsigned int i4b_l1_debug = L1_DEBUG_DEFAULT;
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static int ph_data_req(int, struct mbuf *, int);
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static int ph_activate_req(int);
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/* from i4btrc driver i4b_trace.c */
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extern int get_trace_data_from_l1(int unit, int what, int len, char *buf);
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/* from layer 2 */
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extern int i4b_ph_data_ind(int unit, struct mbuf *m);
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extern int i4b_ph_activate_ind(int unit);
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extern int i4b_ph_deactivate_ind(int unit);
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extern int i4b_mph_attach_ind(int unit);
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extern int i4b_mph_status_ind(int, int, int);
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/* layer 1 lme */
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static int i4b_mph_command_req(int, int, int);
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/* jump table */
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struct i4b_l1l2_func i4b_l1l2_func = {
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/* Layer 1 --> Layer 2 */
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(int (*)(int, struct mbuf *)) i4b_ph_data_ind,
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(int (*)(int)) i4b_ph_activate_ind,
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(int (*)(int)) i4b_ph_deactivate_ind,
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/* Layer 2 --> Layer 1 */
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(int (*)(int, struct mbuf *, int)) ph_data_req,
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(int (*)(int)) ph_activate_req,
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/* Layer 1 --> upstream, ISDN trace data */
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(int (*)(i4b_trace_hdr_t *, int, u_char *)) get_trace_data_from_l1,
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/* Driver control and status information */
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(int (*)(int, int, int)) i4b_mph_status_ind,
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(int (*)(int, int, int)) i4b_mph_command_req,
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};
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/*---------------------------------------------------------------------------*
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*
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* L2 -> L1: PH-DATA-REQUEST
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* =========================
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*
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* parms:
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* unit physical interface unit number
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* m mbuf containing L2 frame to be sent out
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* freeflag MBUF_FREE: free mbuf here after having sent
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* it out
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* MBUF_DONTFREE: mbuf is freed by Layer 2
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* returns:
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* ==0 fail, nothing sent out
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* !=0 ok, frame sent out
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*
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*---------------------------------------------------------------------------*/
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static int
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ph_data_req(int unit, struct mbuf *m, int freeflag)
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{
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u_char cmd;
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int s;
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#ifdef __FreeBSD__
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struct isic_softc *sc = &isic_sc[unit];
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#else
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struct isic_softc *sc = isic_find_sc(unit);
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#endif
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#ifdef NOTDEF
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DBGL1(L1_PRIM, "PH-DATA-REQ", ("unit %d, freeflag=%d\n", unit, freeflag));
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#endif
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if(m == NULL) /* failsafe */
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return (0);
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s = SPLI4B();
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if(sc->sc_I430state == ST_F3) /* layer 1 not running ? */
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{
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DBGL1(L1_I_ERR, "ph_data_req", ("still in state F3!\n"));
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ph_activate_req(unit);
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}
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if(sc->sc_state & ISAC_TX_ACTIVE)
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{
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if(sc->sc_obuf2 == NULL)
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{
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sc->sc_obuf2 = m; /* save mbuf ptr */
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if(freeflag)
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sc->sc_freeflag2 = 1; /* IRQ must mfree */
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else
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sc->sc_freeflag2 = 0; /* IRQ must not mfree */
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DBGL1(L1_I_MSG, "ph_data_req", ("using 2nd ISAC TX buffer, state = %s\n", isic_printstate(sc)));
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if(sc->sc_trace & TRACE_D_TX)
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{
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i4b_trace_hdr_t hdr;
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hdr.unit = unit;
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hdr.type = TRC_CH_D;
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hdr.dir = FROM_TE;
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hdr.count = ++sc->sc_trace_dcount;
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MICROTIME(hdr.time);
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MPH_Trace_Ind(&hdr, m->m_len, m->m_data);
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}
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splx(s);
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return(1);
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}
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DBGL1(L1_I_ERR, "ph_data_req", ("No Space in TX FIFO, state = %s\n", isic_printstate(sc)));
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if(freeflag == MBUF_FREE)
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i4b_Dfreembuf(m);
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splx(s);
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return (0);
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}
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if(sc->sc_trace & TRACE_D_TX)
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{
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i4b_trace_hdr_t hdr;
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hdr.unit = unit;
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hdr.type = TRC_CH_D;
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hdr.dir = FROM_TE;
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hdr.count = ++sc->sc_trace_dcount;
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MICROTIME(hdr.time);
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MPH_Trace_Ind(&hdr, m->m_len, m->m_data);
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}
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sc->sc_state |= ISAC_TX_ACTIVE; /* set transmitter busy flag */
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DBGL1(L1_I_MSG, "ph_data_req", ("ISAC_TX_ACTIVE set\n"));
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sc->sc_freeflag = 0; /* IRQ must NOT mfree */
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ISAC_WRFIFO(m->m_data, min(m->m_len, ISAC_FIFO_LEN)); /* output to TX fifo */
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if(m->m_len > ISAC_FIFO_LEN) /* message > 32 bytes ? */
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{
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sc->sc_obuf = m; /* save mbuf ptr */
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sc->sc_op = m->m_data + ISAC_FIFO_LEN; /* ptr for irq hdl */
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sc->sc_ol = m->m_len - ISAC_FIFO_LEN; /* length for irq hdl */
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if(freeflag)
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sc->sc_freeflag = 1; /* IRQ must mfree */
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cmd = ISAC_CMDR_XTF;
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}
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else
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{
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sc->sc_obuf = NULL;
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sc->sc_op = NULL;
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sc->sc_ol = 0;
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if(freeflag)
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i4b_Dfreembuf(m);
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cmd = ISAC_CMDR_XTF | ISAC_CMDR_XME;
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}
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ISAC_WRITE(I_CMDR, cmd);
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ISACCMDRWRDELAY();
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splx(s);
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return(1);
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}
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/*---------------------------------------------------------------------------*
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*
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* L2 -> L1: PH-ACTIVATE-REQUEST
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* =============================
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*
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* parms:
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* unit physical interface unit number
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*
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* returns:
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* ==0
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* !=0
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*
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*---------------------------------------------------------------------------*/
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static int
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ph_activate_req(int unit)
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{
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#ifdef __FreeBSD__
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struct isic_softc *sc = &isic_sc[unit];
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#else
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struct isic_softc *sc = isic_find_sc(unit);
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#endif
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DBGL1(L1_PRIM, "PH-ACTIVATE-REQ", ("unit %d\n", unit));
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isic_next_state(sc, EV_PHAR);
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return(0);
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}
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/*---------------------------------------------------------------------------*
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* command from the upper layers
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*---------------------------------------------------------------------------*/
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static int
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i4b_mph_command_req(int unit, int command, int parm)
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{
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#ifdef __FreeBSD__
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struct isic_softc *sc = &isic_sc[unit];
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#else
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struct isic_softc *sc = isic_find_sc(unit);
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#endif
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switch(command)
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{
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case CMR_DOPEN: /* daemon running */
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DBGL1(L1_PRIM, "MPH-COMMAND-REQ", ("unit %d, command = CMR_DOPEN\n", unit));
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sc->sc_enabled = 1;
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break;
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case CMR_DCLOSE: /* daemon not running */
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DBGL1(L1_PRIM, "MPH-COMMAND-REQ", ("unit %d, command = CMR_DCLOSE\n", unit));
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sc->sc_enabled = 0;
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break;
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default:
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DBGL1(L1_ERROR, "i4b_mph_command_req", ("ERROR, unknown command = %d, unit = %d, parm = %d\n", command, unit, parm));
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break;
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}
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return(0);
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}
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#endif /* NISIC > 0 */
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