diff options
Diffstat (limited to 'sys/i4b/layer1/isic/i4b_bchan.c')
| -rw-r--r-- | sys/i4b/layer1/isic/i4b_bchan.c | 405 |
1 files changed, 405 insertions, 0 deletions
diff --git a/sys/i4b/layer1/isic/i4b_bchan.c b/sys/i4b/layer1/isic/i4b_bchan.c new file mode 100644 index 0000000..1fb6cc6 --- /dev/null +++ b/sys/i4b/layer1/isic/i4b_bchan.c @@ -0,0 +1,405 @@ +/* + * 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_bchan.c - B channel handling L1 procedures + * ---------------------------------------------- + * + * $Id: i4b_bchan.c,v 1.6 2000/05/29 15:41:41 hm Exp $ + * + * $FreeBSD$ + * + * last edit-date: [Mon May 29 16:42:26 2000] + * + *---------------------------------------------------------------------------*/ + +#include "isic.h" + +#if NISIC > 0 + +#include <sys/param.h> +#include <sys/kernel.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/isic/i4b_isic.h> +#include <i4b/layer1/isic/i4b_isac.h> +#include <i4b/layer1/isic/i4b_hscx.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); + +/*---------------------------------------------------------------------------* + * 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); + } + + NDBGL1(L1_BCHAN, "unit=%d, channel=%d, %s", + 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(!(i4b_l1_bchan_tel_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 = L0ISICUNIT(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); + i4b_l1_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 = L0ISICUNIT(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); + i4b_l1_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->isic_drvr_linktab->bch_activity)(chan->isic_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 + *---------------------------------------------------------------------------*/ +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->isic_isdn_linktab); +} + +/*---------------------------------------------------------------------------* + * set the driver linktab in the b channel softc + *---------------------------------------------------------------------------*/ +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->isic_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->isic_isdn_linktab; + + /* make sure the hardware driver is known to layer 4 */ + ctrl_types[CTRL_PASSIVE].set_linktab = i4b_l1_set_linktab; + ctrl_types[CTRL_PASSIVE].get_linktab = i4b_l1_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->isic_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; +} + +#endif /* NISIC > 0 */ |
