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freebsd-dev/sys/i4b/layer1/i4b_l1.c
Hellmuth Michaelis a90de87a40 update the i4b kernel part to i4b release 0.71.00
1999-03-07 16:08:20 +00:00

318 lines
8.0 KiB
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/*
* 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 1.29 1999/02/14 19:51:02 hm Exp $
*
* last edit-date: [Sun Feb 14 10:28:10 1999]
*
*---------------------------------------------------------------------------*/
#ifdef __FreeBSD__
#include "isic.h"
#else
#define NISIC 1 /* don't bother */
#endif
#if NISIC > 0
#include <sys/param.h>
#if defined(__FreeBSD_version) && __FreeBSD_version >= 300001
#include <sys/ioccom.h>
#else
#include <sys/ioctl.h>
#endif
#include <sys/kernel.h>
#include <sys/systm.h>
#include <sys/mbuf.h>
#include <machine/stdarg.h>
#ifdef __FreeBSD__
#include <machine/clock.h>
#include <i386/isa/isa_device.h>
#else
#ifndef __bsdi__
#include <machine/bus.h>
#endif
#include <sys/device.h>
#endif
#include <sys/socket.h>
#include <net/if.h>
#ifdef __FreeBSD__
#include <machine/i4b_debug.h>
#include <machine/i4b_ioctl.h>
#include <machine/i4b_trace.h>
#else
#include <i4b/i4b_debug.h>
#include <i4b/i4b_ioctl.h>
#include <i4b/i4b_trace.h>
#endif
#include <i4b/layer1/i4b_l1.h>
#include <i4b/layer1/i4b_isac.h>
#include <i4b/layer1/i4b_hscx.h>
#include <i4b/include/i4b_l1l2.h>
#include <i4b/include/i4b_mbuf.h>
#include <i4b/include/i4b_global.h>
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;
#ifdef __FreeBSD__
struct isic_softc *sc = &isic_sc[unit];
#else
struct isic_softc *sc = isic_find_sc(unit);
#endif
#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)
{
#ifdef __FreeBSD__
struct isic_softc *sc = &isic_sc[unit];
#else
struct isic_softc *sc = isic_find_sc(unit);
#endif
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)
{
#ifdef __FreeBSD__
struct isic_softc *sc = &isic_sc[unit];
#else
struct isic_softc *sc = isic_find_sc(unit);
#endif
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 */
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