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NetBSD/sys/netisdn/i4b_rbch.c

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/*
* 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_rbch.c - device driver for raw B channel data
* ---------------------------------------------------
*
* $Id: i4b_rbch.c,v 1.14 2003/10/03 16:38:44 pooka Exp $
*
* $FreeBSD$
*
* last edit-date: [Fri Jan 5 11:33:47 2001]
*
*---------------------------------------------------------------------------*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: i4b_rbch.c,v 1.14 2003/10/03 16:38:44 pooka Exp $");
#include "isdnbchan.h"
#if NISDNBCHAN > 0
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/conf.h>
#include <sys/uio.h>
#include <sys/kernel.h>
#include <sys/mbuf.h>
#include <sys/socket.h>
#include <net/if.h>
#include <sys/proc.h>
#include <sys/tty.h>
#if defined(__NetBSD__) && __NetBSD_Version__ >= 104230000
#include <sys/callout.h>
#endif
#if defined (__NetBSD__) || defined (__OpenBSD__)
#define termioschars(t) memcpy((t)->c_cc, &ttydefchars, sizeof((t)->c_cc))
#endif
#ifdef __FreeBSD__
#if defined(__FreeBSD__) && __FreeBSD__ == 3
#include "opt_devfs.h"
#endif
#ifdef DEVFS
#include <sys/devfsext.h>
#endif
#endif /* __FreeBSD__ */
#ifdef __NetBSD__
#include <sys/filio.h>
#endif
#ifdef __FreeBSD__
#include <machine/i4b_ioctl.h>
#include <machine/i4b_rbch_ioctl.h>
#include <machine/i4b_debug.h>
#else
#include <netisdn/i4b_ioctl.h>
#include <netisdn/i4b_rbch_ioctl.h>
#include <netisdn/i4b_debug.h>
#endif
#include <netisdn/i4b_global.h>
#include <netisdn/i4b_mbuf.h>
#include <netisdn/i4b_l3l4.h>
#include <netisdn/i4b_l4.h>
#ifdef __bsdi__
#include <sys/device.h>
#endif
#ifdef OS_USES_POLL
#include <sys/ioccom.h>
#include <sys/poll.h>
#else
#include <sys/fcntl.h>
#include <sys/ioctl.h>
#endif
#if defined(__FreeBSD__) && __FreeBSD__ >= 3
#include <sys/filio.h>
#endif
#define I4BRBCHACCT 1 /* enable accounting messages */
#define I4BRBCHACCTINTVL 2 /* accounting msg interval in secs */
static struct rbch_softc {
int sc_unit; /* unit number */
int sc_devstate; /* state of driver */
#define ST_IDLE 0x00
#define ST_CONNECTED 0x01
#define ST_ISOPEN 0x02
#define ST_RDWAITDATA 0x04
#define ST_WRWAITEMPTY 0x08
#define ST_NOBLOCK 0x10
int sc_bprot; /* B-ch protocol used */
call_desc_t *sc_cd; /* Call Descriptor */
isdn_link_t *sc_ilt; /* B-channel driver/state */
struct termios it_in;
struct ifqueue sc_hdlcq; /* hdlc read queue */
#define I4BRBCHMAXQLEN 10
struct selinfo selp; /* select / poll */
#if defined(__FreeBSD__) && __FreeBSD__ == 3
#ifdef DEVFS
void *devfs_token; /* device filesystem */
#endif
#endif
#if I4BRBCHACCT
#if defined(__FreeBSD__)
struct callout_handle sc_callout;
#endif
#if defined(__NetBSD__) && __NetBSD_Version__ >= 104230000
struct callout sc_callout;
#endif
int sc_iinb; /* isdn driver # of inbytes */
int sc_ioutb; /* isdn driver # of outbytes */
int sc_linb; /* last # of bytes rx'd */
int sc_loutb; /* last # of bytes tx'd */
int sc_fn; /* flag, first null acct */
#endif
} rbch_softc[NISDNBCHAN];
static void rbch_rx_data_rdy(void *softc);
static void rbch_tx_queue_empty(void *softc);
static void rbch_connect(void *softc, void *cdp);
static void rbch_disconnect(void *softc, void *cdp);
static void rbch_clrq(void *softc);
static void rbch_activity(void *softc, int rxtx);
static void rbch_dialresponse(void *softc, int status, cause_t cause);
static void rbch_updown(void *softc, int updown);
static void rbch_set_linktab(void *softc, isdn_link_t *ilt);
static void* rbch_get_softc(int unit);
#ifndef __FreeBSD__
#define PDEVSTATIC /* - not static - */
#define IOCTL_CMD_T u_long
void isdnbchanattach __P((void));
int isdnbchanopen __P((dev_t dev, int flag, int fmt, struct proc *p));
int isdnbchanclose __P((dev_t dev, int flag, int fmt, struct proc *p));
int isdnbchanread __P((dev_t dev, struct uio *uio, int ioflag));
int isdnbchanwrite __P((dev_t dev, struct uio *uio, int ioflag));
int isdnbchanioctl __P((dev_t dev, IOCTL_CMD_T cmd, caddr_t arg, int flag, struct proc* pr));
#ifdef OS_USES_POLL
int isdnbchanpoll __P((dev_t dev, int events, struct proc *p));
int isdnbchankqfilter __P((dev_t dev, struct knote *kn));
#else
PDEVSTATIC int isdnbchanselect __P((dev_t dev, int rw, struct proc *p));
#endif
#endif
#ifdef __NetBSD__
const struct cdevsw isdnbchan_cdevsw = {
isdnbchanopen, isdnbchanclose, isdnbchanread, isdnbchanwrite,
isdnbchanioctl, nostop, notty, isdnbchanpoll, nommap,
};
#endif /* __NetBSD__ */
#if BSD > 199306 && defined(__FreeBSD__)
#define PDEVSTATIC static
#define IOCTL_CMD_T u_long
PDEVSTATIC d_open_t isdnbchanopen;
PDEVSTATIC d_close_t isdnbchanclose;
PDEVSTATIC d_read_t isdnbchanread;
PDEVSTATIC d_read_t isdnbchanwrite;
PDEVSTATIC d_ioctl_t isdnbchanioctl;
#ifdef OS_USES_POLL
PDEVSTATIC d_poll_t isdnbchanpoll;
#define POLLFIELD isdnbchanpoll
#else
PDEVSTATIC d_select_t isdnbchanselect;
#define POLLFIELD isdnbchanselect
#endif
#define CDEV_MAJOR 57
#if defined(__FreeBSD__) && __FreeBSD__ >= 4
static struct cdevsw isdnbchan_cdevsw = {
/* open */ isdnbchanopen,
/* close */ isdnbchanclose,
/* read */ isdnbchanread,
/* write */ isdnbchanwrite,
/* ioctl */ isdnbchanioctl,
/* poll */ POLLFIELD,
/* mmap */ nommap,
/* strategy */ nostrategy,
/* name */ "isdnbchan",
/* maj */ CDEV_MAJOR,
/* dump */ nodump,
/* psize */ nopsize,
/* flags */ 0,
/* bmaj */ -1
};
#else
static struct cdevsw isdnbchan_cdevsw = {
isdnbchanopen, isdnbchanclose, isdnbchanread, isdnbchanwrite,
isdnbchanioctl, nostop, noreset, nodevtotty,
POLLFIELD, nommap, NULL, "isdnbchan", NULL, -1
};
#endif
static void isdnbchanattach(void *);
PSEUDO_SET(isdnbchanattach, i4b_rbch);
/*===========================================================================*
* DEVICE DRIVER ROUTINES
*===========================================================================*/
/*---------------------------------------------------------------------------*
* initialization at kernel load time
*---------------------------------------------------------------------------*/
static void
isdnbchaninit(void *unused)
{
#if defined(__FreeBSD__) && __FreeBSD__ >= 4
cdevsw_add(&isdnbchan_cdevsw);
#else
dev_t dev = makedev(CDEV_MAJOR, 0);
cdevsw_add(&dev, &isdnbchan_cdevsw, NULL);
#endif
}
SYSINIT(isdnbchandev, SI_SUB_DRIVERS,
SI_ORDER_MIDDLE+CDEV_MAJOR, &isdnbchaninit, NULL);
#endif /* BSD > 199306 && defined(__FreeBSD__) */
#ifdef __bsdi__
int isdnbchanmatch(struct device *parent, struct cfdata *cf, void *aux);
void dummy_isdnbchanattach(struct device*, struct device *, void *);
#define CDEV_MAJOR 61
static struct cfdriver isdnbchancd =
{ NULL, "isdnbchan", isdnbchanmatch, dummy_isdnbchanattach, DV_DULL,
sizeof(struct cfdriver) };
struct devsw isdnbchansw =
{ &isdnbchancd,
isdnbchanopen, isdnbchanclose, isdnbchanread, isdnbchanwrite,
isdnbchanioctl, seltrue, nommap, nostrat,
nodump, nopsize, 0, nostop
};
int
isdnbchanmatch(struct device *parent, struct cfdata *cf, void *aux)
{
printf("isdnbchanmatch: aux=0x%x\n", aux);
return 1;
}
void
dummy_isdnbchanattach(struct device *parent, struct device *self, void *aux)
{
printf("dummy_isdnbchanattach: aux=0x%x\n", aux);
}
#endif /* __bsdi__ */
static const struct isdn_l4_driver_functions
rbch_driver_functions = {
rbch_rx_data_rdy,
rbch_tx_queue_empty,
rbch_activity,
rbch_connect,
rbch_disconnect,
rbch_dialresponse,
rbch_updown,
rbch_get_softc,
rbch_set_linktab,
NULL
};
static int rbch_driver_id = -1;
/*---------------------------------------------------------------------------*
* interface attach routine
*---------------------------------------------------------------------------*/
PDEVSTATIC void
#ifdef __FreeBSD__
isdnbchanattach(void *dummy)
#else
isdnbchanattach()
#endif
{
int i;
rbch_driver_id = isdn_l4_driver_attach("isdnbchan", NISDNBCHAN, &rbch_driver_functions);
for(i=0; i < NISDNBCHAN; i++)
{
#if defined(__FreeBSD__)
#if __FreeBSD__ == 3
#ifdef DEVFS
rbch_softc[i].devfs_token =
devfs_add_devswf(&isdnbchan_cdevsw, i, DV_CHR,
UID_ROOT, GID_WHEEL, 0600,
"isdnbchan%d", i);
#endif
#else
make_dev(&isdnbchan_cdevsw, i,
UID_ROOT, GID_WHEEL, 0600, "isdnbchan%d", i);
#endif
#endif
#if I4BRBCHACCT
#if defined(__FreeBSD__)
callout_handle_init(&rbch_softc[i].sc_callout);
#endif
#if defined(__NetBSD__) && __NetBSD_Version__ >= 104230000
callout_init(&rbch_softc[i].sc_callout);
#endif
rbch_softc[i].sc_fn = 1;
#endif
rbch_softc[i].sc_unit = i;
rbch_softc[i].sc_devstate = ST_IDLE;
rbch_softc[i].sc_hdlcq.ifq_maxlen = I4BRBCHMAXQLEN;
rbch_softc[i].it_in.c_ispeed = rbch_softc[i].it_in.c_ospeed = 64000;
termioschars(&rbch_softc[i].it_in);
}
}
/*---------------------------------------------------------------------------*
* open rbch device
*---------------------------------------------------------------------------*/
PDEVSTATIC int
isdnbchanopen(dev_t dev, int flag, int fmt, struct proc *p)
{
int unit = minor(dev);
if(unit >= NISDNBCHAN)
return(ENXIO);
if(rbch_softc[unit].sc_devstate & ST_ISOPEN)
return(EBUSY);
#if 0
rbch_clrq(unit);
#endif
rbch_softc[unit].sc_devstate |= ST_ISOPEN;
NDBGL4(L4_RBCHDBG, "unit %d, open", unit);
return(0);
}
/*---------------------------------------------------------------------------*
* close rbch device
*---------------------------------------------------------------------------*/
PDEVSTATIC int
isdnbchanclose(dev_t dev, int flag, int fmt, struct proc *p)
{
int unit = minor(dev);
struct rbch_softc *sc = &rbch_softc[unit];
if(sc->sc_devstate & ST_CONNECTED)
i4b_l4_drvrdisc(sc->sc_cd->cdid);
sc->sc_devstate &= ~ST_ISOPEN;
rbch_clrq(sc);
NDBGL4(L4_RBCHDBG, "channel %d, closed", unit);
return(0);
}
/*---------------------------------------------------------------------------*
* read from rbch device
*---------------------------------------------------------------------------*/
PDEVSTATIC int
isdnbchanread(dev_t dev, struct uio *uio, int ioflag)
{
struct mbuf *m;
int error = 0;
int unit = minor(dev);
struct ifqueue *iqp;
struct rbch_softc *sc = &rbch_softc[unit];
int s;
NDBGL4(L4_RBCHDBG, "unit %d, enter read", unit);
s = splnet();
if(!(sc->sc_devstate & ST_ISOPEN))
{
splx(s);
NDBGL4(L4_RBCHDBG, "unit %d, read while not open", unit);
return(EIO);
}
if((sc->sc_devstate & ST_NOBLOCK))
{
if(!(sc->sc_devstate & ST_CONNECTED)) {
splx(s);
return(EWOULDBLOCK);
}
if(sc->sc_bprot == BPROT_RHDLC)
iqp = &sc->sc_hdlcq;
else
iqp = sc->sc_ilt->rx_queue;
if(IF_QEMPTY(iqp) && (sc->sc_devstate & ST_ISOPEN)) {
splx(s);
return(EWOULDBLOCK);
}
}
else
{
while(!(sc->sc_devstate & ST_CONNECTED))
{
NDBGL4(L4_RBCHDBG, "unit %d, wait read init", unit);
if((error = tsleep((caddr_t) &rbch_softc[unit],
TTIPRI | PCATCH,
"rrrbch", 0 )) != 0)
{
splx(s);
NDBGL4(L4_RBCHDBG, "unit %d, error %d tsleep", unit, error);
return(error);
}
}
if(sc->sc_bprot == BPROT_RHDLC)
iqp = &sc->sc_hdlcq;
else
iqp = sc->sc_ilt->rx_queue;
while(IF_QEMPTY(iqp) && (sc->sc_devstate & ST_ISOPEN))
{
sc->sc_devstate |= ST_RDWAITDATA;
NDBGL4(L4_RBCHDBG, "unit %d, wait read data", unit);
if((error = tsleep((caddr_t) &sc->sc_ilt->rx_queue,
TTIPRI | PCATCH,
"rrbch", 0 )) != 0)
{
splx(s);
NDBGL4(L4_RBCHDBG, "unit %d, error %d tsleep read", unit, error);
sc->sc_devstate &= ~ST_RDWAITDATA;
return(error);
} else if (!(sc->sc_devstate & ST_CONNECTED)) {
splx(s);
return 0;
}
}
}
IF_DEQUEUE(iqp, m);
NDBGL4(L4_RBCHDBG, "unit %d, read %d bytes", unit, m->m_len);
if(m && m->m_len)
{
error = uiomove(m->m_data, m->m_len, uio);
}
else
{
NDBGL4(L4_RBCHDBG, "unit %d, error %d uiomove", unit, error);
error = EIO;
}
if(m)
i4b_Bfreembuf(m);
splx(s);
return(error);
}
/*---------------------------------------------------------------------------*
* write to rbch device
*---------------------------------------------------------------------------*/
PDEVSTATIC int
isdnbchanwrite(dev_t dev, struct uio * uio, int ioflag)
{
struct mbuf *m;
int error = 0;
int unit = minor(dev);
struct rbch_softc *sc = &rbch_softc[unit];
int s;
NDBGL4(L4_RBCHDBG, "unit %d, write", unit);
s = splnet();
if(!(sc->sc_devstate & ST_ISOPEN))
{
NDBGL4(L4_RBCHDBG, "unit %d, write while not open", unit);
splx(s);
return(EIO);
}
if((sc->sc_devstate & ST_NOBLOCK))
{
if(!(sc->sc_devstate & ST_CONNECTED)) {
splx(s);
return(EWOULDBLOCK);
}
if(IF_QFULL(sc->sc_ilt->tx_queue) && (sc->sc_devstate & ST_ISOPEN)) {
splx(s);
return(EWOULDBLOCK);
}
}
else
{
while(!(sc->sc_devstate & ST_CONNECTED))
{
NDBGL4(L4_RBCHDBG, "unit %d, write wait init", unit);
error = tsleep((caddr_t) &rbch_softc[unit],
TTIPRI | PCATCH,
"wrrbch", 0 );
if(error == ERESTART) {
splx(s);
return (ERESTART);
}
else if(error == EINTR)
{
splx(s);
NDBGL4(L4_RBCHDBG, "unit %d, EINTR during wait init", unit);
return(EINTR);
}
else if(error)
{
splx(s);
NDBGL4(L4_RBCHDBG, "unit %d, error %d tsleep init", unit, error);
return(error);
}
tsleep((caddr_t) &rbch_softc[unit], TTIPRI | PCATCH, "xrbch", (hz*1));
}
while(IF_QFULL(sc->sc_ilt->tx_queue) && (sc->sc_devstate & ST_ISOPEN))
{
sc->sc_devstate |= ST_WRWAITEMPTY;
NDBGL4(L4_RBCHDBG, "unit %d, write queue full", unit);
if ((error = tsleep((caddr_t) &sc->sc_ilt->tx_queue,
TTIPRI | PCATCH,
"wrbch", 0)) != 0) {
sc->sc_devstate &= ~ST_WRWAITEMPTY;
if(error == ERESTART)
{
splx(s);
return(ERESTART);
}
else if(error == EINTR)
{
splx(s);
NDBGL4(L4_RBCHDBG, "unit %d, EINTR during wait write", unit);
return(error);
}
else if(error)
{
splx(s);
NDBGL4(L4_RBCHDBG, "unit %d, error %d tsleep write", unit, error);
return(error);
}
else if (!(sc->sc_devstate & ST_CONNECTED)) {
splx(s);
return 0;
}
}
}
}
if(!(sc->sc_devstate & ST_ISOPEN))
{
NDBGL4(L4_RBCHDBG, "unit %d, not open anymore", unit);
splx(s);
return(EIO);
}
if((m = i4b_Bgetmbuf(BCH_MAX_DATALEN)) != NULL)
{
m->m_len = min(BCH_MAX_DATALEN, uio->uio_resid);
NDBGL4(L4_RBCHDBG, "unit %d, write %d bytes", unit, m->m_len);
error = uiomove(m->m_data, m->m_len, uio);
if(IF_QFULL(sc->sc_ilt->tx_queue))
{
m_freem(m);
}
else
{
IF_ENQUEUE(sc->sc_ilt->tx_queue, m);
}
(*sc->sc_ilt->bchannel_driver->bch_tx_start)(sc->sc_ilt->l1token, sc->sc_ilt->channel);
}
splx(s);
return(error);
}
/*---------------------------------------------------------------------------*
* rbch device ioctl handlibg
*---------------------------------------------------------------------------*/
PDEVSTATIC int
isdnbchanioctl(dev_t dev, IOCTL_CMD_T cmd, caddr_t data, int flag, struct proc *p)
{
int error = 0;
int unit = minor(dev);
struct rbch_softc *sc = &rbch_softc[unit];
switch(cmd)
{
case FIOASYNC: /* Set async mode */
if (*(int *)data)
{
NDBGL4(L4_RBCHDBG, "unit %d, setting async mode", unit);
}
else
{
NDBGL4(L4_RBCHDBG, "unit %d, clearing async mode", unit);
}
break;
case FIONBIO:
if (*(int *)data)
{
NDBGL4(L4_RBCHDBG, "unit %d, setting non-blocking mode", unit);
sc->sc_devstate |= ST_NOBLOCK;
}
else
{
NDBGL4(L4_RBCHDBG, "unit %d, clearing non-blocking mode", unit);
sc->sc_devstate &= ~ST_NOBLOCK;
}
break;
case TIOCCDTR: /* Clear DTR */
if(sc->sc_devstate & ST_CONNECTED)
{
NDBGL4(L4_RBCHDBG, "unit %d, disconnecting for DTR down", unit);
i4b_l4_drvrdisc(sc->sc_cd->cdid);
}
break;
case I4B_RBCH_DIALOUT:
{
size_t l;
for (l = 0; l < TELNO_MAX && ((char *)data)[l]; l++)
;
if (l)
{
NDBGL4(L4_RBCHDBG, "%d, attempting dialout to %s", unit, (char *)data);
i4b_l4_dialoutnumber(rbch_driver_id, unit, l, (char *)data);
break;
}
/* fall through to SDTR */
}
case TIOCSDTR: /* Set DTR */
NDBGL4(L4_RBCHDBG, "unit %d, attempting dialout (DTR)", unit);
i4b_l4_dialout(rbch_driver_id, unit);
break;
case TIOCSETA: /* Set termios struct */
break;
case TIOCGETA: /* Get termios struct */
*(struct termios *)data = sc->it_in;
break;
case TIOCMGET:
*(int *)data = TIOCM_LE|TIOCM_DTR|TIOCM_RTS|TIOCM_CTS|TIOCM_DSR;
if (sc->sc_devstate & ST_CONNECTED)
*(int *)data |= TIOCM_CD;
break;
case I4B_RBCH_VR_REQ:
{
msg_vr_req_t *mvr;
mvr = (msg_vr_req_t *)data;
mvr->version = VERSION;
mvr->release = REL;
mvr->step = STEP;
break;
}
default: /* Unknown stuff */
NDBGL4(L4_RBCHDBG, "(minor=%d) ioctl, unknown cmd %lx", unit, (u_long)cmd);
error = EINVAL;
break;
}
return(error);
}
#ifdef OS_USES_POLL
/*---------------------------------------------------------------------------*
* device driver poll
*---------------------------------------------------------------------------*/
PDEVSTATIC int
isdnbchanpoll(dev_t dev, int events, struct proc *p)
{
int revents = 0; /* Events we found */
int s;
int unit = minor(dev);
struct rbch_softc *sc = &rbch_softc[unit];
/* We can't check for anything but IN or OUT */
s = splhigh();
if(!(sc->sc_devstate & ST_ISOPEN))
{
splx(s);
return(POLLNVAL);
}
/*
* Writes are OK if we are connected and the
* transmit queue can take them
*/
if((events & (POLLOUT|POLLWRNORM)) &&
(sc->sc_devstate & ST_CONNECTED) &&
!IF_QFULL(sc->sc_ilt->tx_queue))
{
revents |= (events & (POLLOUT|POLLWRNORM));
}
/* ... while reads are OK if we have any data */
if((events & (POLLIN|POLLRDNORM)) &&
(sc->sc_devstate & ST_CONNECTED))
{
struct ifqueue *iqp;
if(sc->sc_bprot == BPROT_RHDLC)
iqp = &sc->sc_hdlcq;
else
iqp = sc->sc_ilt->rx_queue;
if(!IF_QEMPTY(iqp))
revents |= (events & (POLLIN|POLLRDNORM));
}
if(revents == 0)
selrecord(p, &sc->selp);
splx(s);
return(revents);
}
static void
filt_i4brbchdetach(struct knote *kn)
{
struct rbch_softc *sc = kn->kn_hook;
int s;
s = splhigh();
SLIST_REMOVE(&sc->selp.sel_klist, kn, knote, kn_selnext);
splx(s);
}
static int
filt_i4brbchread(struct knote *kn, long hint)
{
struct rbch_softc *sc = kn->kn_hook;
struct ifqueue *iqp;
if ((sc->sc_devstate & ST_CONNECTED) == 0)
return (0);
if (sc->sc_bprot == BPROT_RHDLC)
iqp = &sc->sc_hdlcq;
else
iqp = sc->sc_ilt->rx_queue;
if (IF_QEMPTY(iqp))
return (0);
kn->kn_data = 0; /* XXXLUKEM (thorpej): what to put here? */
return (1);
}
static const struct filterops i4brbchread_filtops =
{ 1, NULL, filt_i4brbchdetach, filt_i4brbchread };
static int
filt_i4brbchwrite(struct knote *kn, long hint)
{
struct rbch_softc *sc = kn->kn_hook;
if ((sc->sc_devstate & ST_CONNECTED) == 0)
return (0);
if (IF_QFULL(sc->sc_ilt->tx_queue))
return (0);
kn->kn_data = 0; /* XXXLUKEM (thorpej): what to put here? */
return (1);
}
static const struct filterops i4brbchwrite_filtops =
{ 1, NULL, filt_i4brbchdetach, filt_i4brbchwrite };
int
isdnbchankqfilter(dev_t dev, struct knote *kn)
{
struct rbch_softc *sc = &rbch_softc[minor(dev)];
struct klist *klist;
int s;
switch (kn->kn_filter) {
case EVFILT_READ:
klist = &sc->selp.sel_klist;
kn->kn_fop = &i4brbchread_filtops;
break;
case EVFILT_WRITE:
klist = &sc->selp.sel_klist;
kn->kn_fop = &i4brbchwrite_filtops;
break;
default:
return (1);
}
kn->kn_hook = sc;
s = splhigh();
SLIST_INSERT_HEAD(klist, kn, kn_selnext);
splx(s);
return (0);
}
#else /* OS_USES_POLL */
/*---------------------------------------------------------------------------*
* device driver select
*---------------------------------------------------------------------------*/
PDEVSTATIC int
isdnbchanselect(dev_t dev, int rw, struct proc *p)
{
int unit = minor(dev);
struct rbch_softc *sc = &rbch_softc[unit];
int s;
s = splhigh();
if(!(sc->sc_devstate & ST_ISOPEN))
{
splx(s);
NDBGL4(L4_RBCHDBG, "(minor=%d) not open anymore", unit);
return(1);
}
if(sc->sc_devstate & ST_CONNECTED)
{
struct ifqueue *iqp;
switch(rw)
{
case FREAD:
if(sc->sc_bprot == BPROT_RHDLC)
iqp = &sc->sc_hdlcq;
else
iqp = isdn_linktab[unit]->rx_queue;
if(!IF_QEMPTY(iqp))
{
splx(s);
return(1);
}
break;
case FWRITE:
if(!IF_QFULL(isdn_linktab[unit]->rx_queue))
{
splx(s);
return(1);
}
break;
default:
splx(s);
return 0;
}
}
selrecord(p, &sc->selp);
splx(s);
return(0);
}
#endif /* OS_USES_POLL */
#if I4BRBCHACCT
/*---------------------------------------------------------------------------*
* watchdog routine
*---------------------------------------------------------------------------*/
static void
rbch_timeout(struct rbch_softc *sc)
{
bchan_statistics_t bs;
/* get # of bytes in and out from the HSCX driver */
(*sc->sc_ilt->bchannel_driver->bch_stat)
(sc->sc_ilt->l1token, sc->sc_ilt->channel, &bs);
sc->sc_ioutb += bs.outbytes;
sc->sc_iinb += bs.inbytes;
if((sc->sc_iinb != sc->sc_linb) || (sc->sc_ioutb != sc->sc_loutb) || sc->sc_fn)
{
int ri = (sc->sc_iinb - sc->sc_linb)/I4BRBCHACCTINTVL;
int ro = (sc->sc_ioutb - sc->sc_loutb)/I4BRBCHACCTINTVL;
if((sc->sc_iinb == sc->sc_linb) && (sc->sc_ioutb == sc->sc_loutb))
sc->sc_fn = 0;
else
sc->sc_fn = 1;
sc->sc_linb = sc->sc_iinb;
sc->sc_loutb = sc->sc_ioutb;
if (sc->sc_cd)
i4b_l4_accounting(sc->sc_cd->cdid, ACCT_DURING,
sc->sc_ioutb, sc->sc_iinb, ro, ri, sc->sc_ioutb, sc->sc_iinb);
}
START_TIMER(sc->sc_callout, rbch_timeout, sc, I4BRBCHACCTINTVL*hz);
}
#endif /* I4BRBCHACCT */
/*===========================================================================*
* ISDN INTERFACE ROUTINES
*===========================================================================*/
/*---------------------------------------------------------------------------*
* this routine is called from L4 handler at connect time
*---------------------------------------------------------------------------*/
static void
rbch_connect(void *softc, void *cdp)
{
call_desc_t *cd = (call_desc_t *)cdp;
struct rbch_softc *sc = softc;
sc->sc_bprot = cd->bprot;
#if I4BRBCHACCT
if(sc->sc_bprot == BPROT_RHDLC)
{
sc->sc_iinb = 0;
sc->sc_ioutb = 0;
sc->sc_linb = 0;
sc->sc_loutb = 0;
START_TIMER(sc->sc_callout, rbch_timeout, sc, I4BRBCHACCTINTVL*hz);
}
#endif
if(!(sc->sc_devstate & ST_CONNECTED))
{
NDBGL4(L4_RBCHDBG, "B channel %d at ISDN %d, wakeup",
cd->channelid, cd->isdnif);
sc->sc_devstate |= ST_CONNECTED;
sc->sc_cd = cdp;
wakeup((caddr_t)sc);
selwakeup(&sc->selp);
}
}
/*---------------------------------------------------------------------------*
* this routine is called from L4 handler at disconnect time
*---------------------------------------------------------------------------*/
static void
rbch_disconnect(void *softc, void *cdp)
{
call_desc_t *cd = cdp;
struct rbch_softc *sc = softc;
int s;
if(cd != sc->sc_cd)
{
NDBGL4(L4_RBCHDBG, "B channel %d at ISDN %d not active",
cd->channelid, cd->isdnif);
return;
}
s = splnet();
NDBGL4(L4_RBCHDBG, "B channel %d at ISDN %d disconnect",
cd->channelid, cd->isdnif);
sc->sc_devstate &= ~ST_CONNECTED;
#if I4BRBCHACCT
if (sc->sc_cd)
i4b_l4_accounting(sc->sc_cd->cdid, ACCT_FINAL,
sc->sc_ioutb, sc->sc_iinb, 0, 0, sc->sc_ioutb, sc->sc_iinb);
STOP_TIMER(sc->sc_callout, rbch_timeout, sc);
#endif
sc->sc_cd = NULL;
if (sc->sc_devstate & ST_RDWAITDATA)
wakeup(&sc->sc_ilt->rx_queue);
if (sc->sc_devstate & ST_WRWAITEMPTY)
wakeup(&sc->sc_ilt->tx_queue);
splx(s);
selwakeup(&sc->selp);
}
/*---------------------------------------------------------------------------*
* feedback from daemon in case of dial problems
*---------------------------------------------------------------------------*/
static void
rbch_dialresponse(void *softc, int status, cause_t cause)
{
}
/*---------------------------------------------------------------------------*
* interface up/down
*---------------------------------------------------------------------------*/
static void
rbch_updown(void *softc, int updown)
{
}
/*---------------------------------------------------------------------------*
* this routine is called from the HSCX interrupt handler
* when a new frame (mbuf) has been received and is to be put on
* the rx queue.
*---------------------------------------------------------------------------*/
static void
rbch_rx_data_rdy(void *softc)
{
struct rbch_softc *sc = softc;
if(sc->sc_bprot == BPROT_RHDLC)
{
register struct mbuf *m;
if((m = *sc->sc_ilt->rx_mbuf) == NULL)
return;
m->m_pkthdr.len = m->m_len;
if(IF_QFULL(&sc->sc_hdlcq))
{
NDBGL4(L4_RBCHDBG, "(minor=%d) hdlc rx queue full!", sc->sc_unit);
m_freem(m);
}
else
{
IF_ENQUEUE(&sc->sc_hdlcq, m);
}
}
if(sc->sc_devstate & ST_RDWAITDATA)
{
NDBGL4(L4_RBCHDBG, "(minor=%d) wakeup", sc->sc_unit);
sc->sc_devstate &= ~ST_RDWAITDATA;
wakeup((caddr_t) &sc->sc_ilt->rx_queue);
}
else
{
NDBGL4(L4_RBCHDBG, "(minor=%d) NO wakeup", sc->sc_unit);
}
selnotify(&sc->selp, 0);
}
/*---------------------------------------------------------------------------*
* this routine is called from the HSCX interrupt handler
* when the last frame has been sent out and there is no
* further frame (mbuf) in the tx queue.
*---------------------------------------------------------------------------*/
static void
rbch_tx_queue_empty(void *softc)
{
struct rbch_softc *sc = softc;
if(sc->sc_devstate & ST_WRWAITEMPTY)
{
NDBGL4(L4_RBCHDBG, "(minor=%d): wakeup", sc->sc_unit);
sc->sc_devstate &= ~ST_WRWAITEMPTY;
wakeup((caddr_t) &sc->sc_ilt->tx_queue);
}
else
{
NDBGL4(L4_RBCHDBG, "(minor=%d) NO wakeup", sc->sc_unit);
}
selnotify(&sc->selp, 0);
}
/*---------------------------------------------------------------------------*
* this routine is called from the HSCX interrupt handler
* each time a packet is received or transmitted
*---------------------------------------------------------------------------*/
static void
rbch_activity(void *softc, int rxtx)
{
struct rbch_softc *sc = softc;
if (sc->sc_cd)
sc->sc_cd->last_active_time = SECOND;
selnotify(&sc->selp, 0);
}
/*---------------------------------------------------------------------------*
* clear an hdlc rx queue for a rbch unit
*---------------------------------------------------------------------------*/
static void
rbch_clrq(void *softc)
{
struct rbch_softc *sc = softc;
struct mbuf *m;
int s;
for(;;)
{
s = splnet();
IF_DEQUEUE(&sc->sc_hdlcq, m);
splx(s);
if(m)
m_freem(m);
else
break;
}
}
/*---------------------------------------------------------------------------*
* setup the isdn_linktab for this driver
*---------------------------------------------------------------------------*/
static void
rbch_set_linktab(void *softc, isdn_link_t *ilt)
{
struct rbch_softc *sc = softc;
sc->sc_ilt = ilt;
}
/*---------------------------------------------------------------------------*
* initialize this drivers linktab
*---------------------------------------------------------------------------*/
static void*
rbch_get_softc(int unit)
{
return &rbch_softc[unit];
}
/*===========================================================================*/
#endif /* NISDNBCHAN > 0 */
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