62efea1e92
ioccom.h defines only implementation detail, and should therefore only be included from the #include which defines the ioctl tags, in other words: never include it from *.c
438 lines
12 KiB
C
438 lines
12 KiB
C
/*
|
|
* 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_bchan.c - B channel handling L1 procedures
|
|
* ----------------------------------------------
|
|
*
|
|
* $Id: i4b_bchan.c,v 1.2 1999/12/13 21:25:26 hm Exp $
|
|
*
|
|
* $FreeBSD$
|
|
*
|
|
* last edit-date: [Mon Dec 13 21:59:11 1999]
|
|
*
|
|
*---------------------------------------------------------------------------*/
|
|
|
|
#include "isic.h"
|
|
|
|
#if NISIC > 0
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/mbuf.h>
|
|
#include <machine/stdarg.h>
|
|
|
|
#include <machine/clock.h>
|
|
|
|
#include <sys/socket.h>
|
|
#include <net/if.h>
|
|
|
|
#include <machine/i4b_debug.h>
|
|
#include <machine/i4b_ioctl.h>
|
|
#include <machine/i4b_trace.h>
|
|
|
|
#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>
|
|
|
|
static void isic_bchannel_start(int unit, int h_chan);
|
|
static void isic_bchannel_stat(int unit, int h_chan, bchan_statistics_t *bsp);
|
|
static void isic_set_linktab(int unit, int channel, drvr_link_t *dlt);
|
|
static isdn_link_t *isic_ret_linktab(int unit, int channel);
|
|
|
|
/*---------------------------------------------------------------------------*
|
|
* initialize one B channels rx/tx data structures and init/deinit HSCX
|
|
*---------------------------------------------------------------------------*/
|
|
void
|
|
isic_bchannel_setup(int unit, int h_chan, int bprot, int activate)
|
|
{
|
|
struct l1_softc *sc = &l1_sc[unit];
|
|
l1_bchan_state_t *chan = &sc->sc_chan[h_chan];
|
|
|
|
int s = SPLI4B();
|
|
|
|
if(activate == 0)
|
|
{
|
|
/* deactivation */
|
|
isic_hscx_init(sc, h_chan, activate);
|
|
}
|
|
|
|
DBGL1(L1_BCHAN, "isic_bchannel_setup", ("unit=%d, channel=%d, %s\n",
|
|
sc->sc_unit, h_chan, activate ? "activate" : "deactivate"));
|
|
|
|
/* general part */
|
|
|
|
chan->unit = sc->sc_unit; /* unit number */
|
|
chan->channel = h_chan; /* B channel */
|
|
chan->bprot = bprot; /* B channel protocol */
|
|
chan->state = HSCX_IDLE; /* B channel state */
|
|
|
|
/* receiver part */
|
|
|
|
i4b_Bcleanifq(&chan->rx_queue); /* clean rx queue */
|
|
|
|
chan->rx_queue.ifq_maxlen = IFQ_MAXLEN;
|
|
|
|
chan->rxcount = 0; /* reset rx counter */
|
|
|
|
i4b_Bfreembuf(chan->in_mbuf); /* clean rx mbuf */
|
|
|
|
chan->in_mbuf = NULL; /* reset mbuf ptr */
|
|
chan->in_cbptr = NULL; /* reset mbuf curr ptr */
|
|
chan->in_len = 0; /* reset mbuf data len */
|
|
|
|
/* transmitter part */
|
|
|
|
i4b_Bcleanifq(&chan->tx_queue); /* clean tx queue */
|
|
|
|
chan->tx_queue.ifq_maxlen = IFQ_MAXLEN;
|
|
|
|
chan->txcount = 0; /* reset tx counter */
|
|
|
|
i4b_Bfreembuf(chan->out_mbuf_head); /* clean tx mbuf */
|
|
|
|
chan->out_mbuf_head = NULL; /* reset head mbuf ptr */
|
|
chan->out_mbuf_cur = NULL; /* reset current mbuf ptr */
|
|
chan->out_mbuf_cur_ptr = NULL; /* reset current mbuf data ptr */
|
|
chan->out_mbuf_cur_len = 0; /* reset current mbuf data cnt */
|
|
|
|
if(activate != 0)
|
|
{
|
|
/* activation */
|
|
isic_hscx_init(sc, h_chan, activate);
|
|
}
|
|
|
|
splx(s);
|
|
}
|
|
|
|
/*---------------------------------------------------------------------------*
|
|
* start transmission on a b channel
|
|
*---------------------------------------------------------------------------*/
|
|
static void
|
|
isic_bchannel_start(int unit, int h_chan)
|
|
{
|
|
struct l1_softc *sc = &l1_sc[unit];
|
|
register l1_bchan_state_t *chan = &sc->sc_chan[h_chan];
|
|
register int next_len;
|
|
register int len;
|
|
|
|
int s;
|
|
int activity = -1;
|
|
int cmd = 0;
|
|
|
|
s = SPLI4B(); /* enter critical section */
|
|
if(chan->state & HSCX_TX_ACTIVE) /* already running ? */
|
|
{
|
|
splx(s);
|
|
return; /* yes, leave */
|
|
}
|
|
|
|
/* get next mbuf from queue */
|
|
|
|
IF_DEQUEUE(&chan->tx_queue, chan->out_mbuf_head);
|
|
|
|
if(chan->out_mbuf_head == NULL) /* queue empty ? */
|
|
{
|
|
splx(s); /* leave critical section */
|
|
return; /* yes, exit */
|
|
}
|
|
|
|
/* init current mbuf values */
|
|
|
|
chan->out_mbuf_cur = chan->out_mbuf_head;
|
|
chan->out_mbuf_cur_len = chan->out_mbuf_cur->m_len;
|
|
chan->out_mbuf_cur_ptr = chan->out_mbuf_cur->m_data;
|
|
|
|
/* activity indicator for timeout handling */
|
|
|
|
if(chan->bprot == BPROT_NONE)
|
|
{
|
|
if(!(isic_hscx_silence(chan->out_mbuf_cur->m_data, chan->out_mbuf_cur->m_len)))
|
|
activity = ACT_TX;
|
|
}
|
|
else
|
|
{
|
|
activity = ACT_TX;
|
|
}
|
|
|
|
chan->state |= HSCX_TX_ACTIVE; /* we start transmitting */
|
|
|
|
if(sc->sc_trace & TRACE_B_TX) /* if trace, send mbuf to trace dev */
|
|
{
|
|
i4b_trace_hdr_t hdr;
|
|
hdr.unit = unit;
|
|
hdr.type = (h_chan == HSCX_CH_A ? TRC_CH_B1 : TRC_CH_B2);
|
|
hdr.dir = FROM_TE;
|
|
hdr.count = ++sc->sc_trace_bcount;
|
|
MICROTIME(hdr.time);
|
|
MPH_Trace_Ind(&hdr, chan->out_mbuf_cur->m_len, chan->out_mbuf_cur->m_data);
|
|
}
|
|
|
|
len = 0; /* # of chars put into HSCX tx fifo this time */
|
|
|
|
/*
|
|
* fill the HSCX tx fifo with data from the current mbuf. if
|
|
* current mbuf holds less data than HSCX fifo length, try to
|
|
* get the next mbuf from (a possible) mbuf chain. if there is
|
|
* not enough data in a single mbuf or in a chain, then this
|
|
* is the last mbuf and we tell the HSCX that it has to send
|
|
* CRC and closing flag
|
|
*/
|
|
|
|
while((len < sc->sc_bfifolen) && chan->out_mbuf_cur)
|
|
{
|
|
/*
|
|
* put as much data into the HSCX fifo as is
|
|
* available from the current mbuf
|
|
*/
|
|
|
|
if((len + chan->out_mbuf_cur_len) >= sc->sc_bfifolen)
|
|
next_len = sc->sc_bfifolen - len;
|
|
else
|
|
next_len = chan->out_mbuf_cur_len;
|
|
|
|
#ifdef NOTDEF
|
|
printf("b:mh=%x, mc=%x, mcp=%x, mcl=%d l=%d nl=%d # ",
|
|
chan->out_mbuf_head,
|
|
chan->out_mbuf_cur,
|
|
chan->out_mbuf_cur_ptr,
|
|
chan->out_mbuf_cur_len,
|
|
len,
|
|
next_len);
|
|
#endif
|
|
|
|
/* wait for tx fifo write enabled */
|
|
|
|
isic_hscx_waitxfw(sc, h_chan);
|
|
|
|
/* write what we have from current mbuf to HSCX fifo */
|
|
|
|
HSCX_WRFIFO(h_chan, chan->out_mbuf_cur_ptr, next_len);
|
|
|
|
len += next_len; /* update # of bytes written */
|
|
chan->txcount += next_len; /* statistics */
|
|
chan->out_mbuf_cur_ptr += next_len; /* data ptr */
|
|
chan->out_mbuf_cur_len -= next_len; /* data len */
|
|
|
|
/*
|
|
* in case the current mbuf (of a possible chain) data
|
|
* has been put into the fifo, check if there is a next
|
|
* mbuf in the chain. If there is one, get ptr to it
|
|
* and update the data ptr and the length
|
|
*/
|
|
|
|
if((chan->out_mbuf_cur_len <= 0) &&
|
|
((chan->out_mbuf_cur = chan->out_mbuf_cur->m_next) != NULL))
|
|
{
|
|
chan->out_mbuf_cur_ptr = chan->out_mbuf_cur->m_data;
|
|
chan->out_mbuf_cur_len = chan->out_mbuf_cur->m_len;
|
|
|
|
if(sc->sc_trace & TRACE_B_TX)
|
|
{
|
|
i4b_trace_hdr_t hdr;
|
|
hdr.unit = unit;
|
|
hdr.type = (h_chan == HSCX_CH_A ? TRC_CH_B1 : TRC_CH_B2);
|
|
hdr.dir = FROM_TE;
|
|
hdr.count = ++sc->sc_trace_bcount;
|
|
MICROTIME(hdr.time);
|
|
MPH_Trace_Ind(&hdr, chan->out_mbuf_cur->m_len, chan->out_mbuf_cur->m_data);
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* if there is either still data in the current mbuf and/or
|
|
* there is a successor on the chain available issue just
|
|
* a XTF (transmit) command to HSCX. if ther is no more
|
|
* data available from the current mbuf (-chain), issue
|
|
* an XTF and an XME (message end) command which will then
|
|
* send the CRC and the closing HDLC flag sequence
|
|
*/
|
|
|
|
if(chan->out_mbuf_cur && (chan->out_mbuf_cur_len > 0))
|
|
{
|
|
/*
|
|
* more data available, send current fifo out.
|
|
* next xfer to HSCX tx fifo is done in the
|
|
* HSCX interrupt routine.
|
|
*/
|
|
|
|
cmd |= HSCX_CMDR_XTF;
|
|
}
|
|
else
|
|
{
|
|
/* end of mbuf chain */
|
|
|
|
if(chan->bprot == BPROT_NONE)
|
|
cmd |= HSCX_CMDR_XTF;
|
|
else
|
|
cmd |= HSCX_CMDR_XTF | HSCX_CMDR_XME;
|
|
|
|
i4b_Bfreembuf(chan->out_mbuf_head); /* free mbuf chain */
|
|
|
|
chan->out_mbuf_head = NULL;
|
|
chan->out_mbuf_cur = NULL;
|
|
chan->out_mbuf_cur_ptr = NULL;
|
|
chan->out_mbuf_cur_len = 0;
|
|
}
|
|
|
|
/* call timeout handling routine */
|
|
|
|
if(activity == ACT_RX || activity == ACT_TX)
|
|
(*chan->drvr_linktab->bch_activity)(chan->drvr_linktab->unit, activity);
|
|
|
|
if(cmd)
|
|
isic_hscx_cmd(sc, h_chan, cmd);
|
|
|
|
splx(s);
|
|
}
|
|
|
|
/*---------------------------------------------------------------------------*
|
|
* fill statistics struct
|
|
*---------------------------------------------------------------------------*/
|
|
static void
|
|
isic_bchannel_stat(int unit, int h_chan, bchan_statistics_t *bsp)
|
|
{
|
|
struct l1_softc *sc = &l1_sc[unit];
|
|
l1_bchan_state_t *chan = &sc->sc_chan[h_chan];
|
|
int s;
|
|
|
|
s = SPLI4B();
|
|
|
|
bsp->outbytes = chan->txcount;
|
|
bsp->inbytes = chan->rxcount;
|
|
|
|
chan->txcount = 0;
|
|
chan->rxcount = 0;
|
|
|
|
splx(s);
|
|
}
|
|
|
|
/*---------------------------------------------------------------------------*
|
|
* return the address of isic drivers linktab
|
|
*---------------------------------------------------------------------------*/
|
|
static isdn_link_t *
|
|
isic_ret_linktab(int unit, int channel)
|
|
{
|
|
struct l1_softc *sc = &l1_sc[unit];
|
|
l1_bchan_state_t *chan = &sc->sc_chan[channel];
|
|
|
|
return(&chan->isdn_linktab);
|
|
}
|
|
|
|
/*---------------------------------------------------------------------------*
|
|
* set the driver linktab in the b channel softc
|
|
*---------------------------------------------------------------------------*/
|
|
static void
|
|
isic_set_linktab(int unit, int channel, drvr_link_t *dlt)
|
|
{
|
|
struct l1_softc *sc = &l1_sc[unit];
|
|
l1_bchan_state_t *chan = &sc->sc_chan[channel];
|
|
|
|
chan->drvr_linktab = dlt;
|
|
}
|
|
|
|
/*---------------------------------------------------------------------------*
|
|
* initialize our local linktab
|
|
*---------------------------------------------------------------------------*/
|
|
void
|
|
isic_init_linktab(struct l1_softc *sc)
|
|
{
|
|
l1_bchan_state_t *chan = &sc->sc_chan[HSCX_CH_A];
|
|
isdn_link_t *lt = &chan->isdn_linktab;
|
|
|
|
/* make sure the hardware driver is known to layer 4 */
|
|
ctrl_types[CTRL_PASSIVE].set_linktab = isic_set_linktab;
|
|
ctrl_types[CTRL_PASSIVE].get_linktab = isic_ret_linktab;
|
|
|
|
/* local setup */
|
|
lt->unit = sc->sc_unit;
|
|
lt->channel = HSCX_CH_A;
|
|
lt->bch_config = isic_bchannel_setup;
|
|
lt->bch_tx_start = isic_bchannel_start;
|
|
lt->bch_stat = isic_bchannel_stat;
|
|
lt->tx_queue = &chan->tx_queue;
|
|
|
|
/* used by non-HDLC data transfers, i.e. telephony drivers */
|
|
lt->rx_queue = &chan->rx_queue;
|
|
|
|
/* used by HDLC data transfers, i.e. ipr and isp drivers */
|
|
lt->rx_mbuf = &chan->in_mbuf;
|
|
|
|
chan = &sc->sc_chan[HSCX_CH_B];
|
|
lt = &chan->isdn_linktab;
|
|
|
|
lt->unit = sc->sc_unit;
|
|
lt->channel = HSCX_CH_B;
|
|
lt->bch_config = isic_bchannel_setup;
|
|
lt->bch_tx_start = isic_bchannel_start;
|
|
lt->bch_stat = isic_bchannel_stat;
|
|
lt->tx_queue = &chan->tx_queue;
|
|
|
|
/* used by non-HDLC data transfers, i.e. telephony drivers */
|
|
lt->rx_queue = &chan->rx_queue;
|
|
|
|
/* used by HDLC data transfers, i.e. ipr and isp drivers */
|
|
lt->rx_mbuf = &chan->in_mbuf;
|
|
}
|
|
|
|
/*---------------------------------------------------------------------------*
|
|
* telephony silence detection
|
|
*---------------------------------------------------------------------------*/
|
|
|
|
#define TEL_IDLE_MIN (BCH_MAX_DATALEN/2)
|
|
|
|
int
|
|
isic_hscx_silence(unsigned char *data, int len)
|
|
{
|
|
register int i = 0;
|
|
register int j = 0;
|
|
|
|
/* count idle bytes */
|
|
|
|
for(;i < len; i++)
|
|
{
|
|
if((*data >= 0xaa) && (*data <= 0xac))
|
|
j++;
|
|
data++;
|
|
}
|
|
|
|
#ifdef NOTDEF
|
|
printf("isic_hscx_silence: got %d silence bytes in frame\n", j);
|
|
#endif
|
|
|
|
if(j < (TEL_IDLE_MIN))
|
|
return(0);
|
|
else
|
|
return(1);
|
|
|
|
}
|
|
|
|
#endif /* NISIC > 0 */
|