Ejemplo n.º 1
0
void
uhid_intr(struct uhidev *addr, void *data, u_int len)
{
	struct uhid_softc *sc = (struct uhid_softc *)addr;

#ifdef UHID_DEBUG
	if (uhiddebug > 5) {
		u_int32_t i;

		DPRINTF(("uhid_intr: data ="));
		for (i = 0; i < len; i++)
			DPRINTF((" %02x", ((u_char *)data)[i]));
		DPRINTF(("\n"));
	}
#endif

	(void)b_to_q(data, len, &sc->sc_q);

	if (sc->sc_state & UHID_ASLP) {
		sc->sc_state &= ~UHID_ASLP;
		DPRINTFN(5, ("uhid_intr: waking %p\n", &sc->sc_q));
		wakeup(&sc->sc_q);
	}
	selwakeup(&sc->sc_rsel);
	if (sc->sc_async != NULL) {
		DPRINTFN(3, ("uhid_intr: sending SIGIO %p\n", sc->sc_async));
		prsignal(sc->sc_async, SIGIO);
	}
}
Ejemplo n.º 2
0
void
ugenintr(struct usbd_xfer *xfer, void *addr, usbd_status status)
{
	struct ugen_endpoint *sce = addr;
	/*struct ugen_softc *sc = sce->sc;*/
	u_int32_t count;
	u_char *ibuf;

	if (status == USBD_CANCELLED)
		return;

	if (status != USBD_NORMAL_COMPLETION) {
		DPRINTF(("ugenintr: status=%d\n", status));
		if (status == USBD_STALLED)
			usbd_clear_endpoint_stall_async(sce->pipeh);
		return;
	}

	usbd_get_xfer_status(xfer, NULL, NULL, &count, NULL);
	ibuf = sce->ibuf;

	DPRINTFN(5, ("ugenintr: xfer=%p status=%d count=%d\n",
		     xfer, status, count));
	DPRINTFN(5, ("          data = %02x %02x %02x\n",
		     ibuf[0], ibuf[1], ibuf[2]));

	(void)b_to_q(ibuf, count, &sce->q);

	if (sce->state & UGEN_ASLP) {
		sce->state &= ~UGEN_ASLP;
		DPRINTFN(5, ("ugen_intr: waking %p\n", sce));
		wakeup(sce);
	}
	selwakeup(&sce->rsel);
}
Ejemplo n.º 3
0
Archivo: uhid.c Proyecto: MarginC/kame
void
uhid_intr(usbd_xfer_handle xfer, usbd_private_handle addr, usbd_status status)
{
	struct uhid_softc *sc = addr;

#ifdef USB_DEBUG
	if (uhiddebug > 5) {
		u_int32_t cc, i;
		
		usbd_get_xfer_status(xfer, NULL, NULL, &cc, NULL);
		DPRINTF(("uhid_intr: status=%d cc=%d\n", status, cc));
		DPRINTF(("uhid_intr: data ="));
		for (i = 0; i < cc; i++)
			DPRINTF((" %02x", sc->sc_ibuf[i]));
		DPRINTF(("\n"));
	}
#endif

	if (status == USBD_CANCELLED)
		return;

	if (status != USBD_NORMAL_COMPLETION) {
		DPRINTF(("uhid_intr: status=%d\n", status));
		if (status == USBD_STALLED)
		    sc->sc_state |= UHID_NEEDCLEAR;
		return;
	}

	(void) b_to_q(sc->sc_ibuf, sc->sc_isize, &sc->sc_q);
		
	if (sc->sc_state & UHID_ASLP) {
		sc->sc_state &= ~UHID_ASLP;
		DPRINTFN(5, ("uhid_intr: waking %p\n", &sc->sc_q));
		wakeup(&sc->sc_q);
	}
	selwakeup(&sc->sc_rsel);
	if (sc->sc_async != NULL) {
		DPRINTFN(3, ("uhid_intr: sending SIGIO %p\n", sc->sc_async));
		PROC_LOCK(sc->sc_async);
		psignal(sc->sc_async, SIGIO);
		PROC_UNLOCK(sc->sc_async);
	}
}
Ejemplo n.º 4
0
int
ptcwrite(dev_t dev, struct uio *uio, int flag)
{
	struct pt_softc *pti = pt_softc[minor(dev)];
	struct tty *tp = pti->pt_tty;
	u_char *cp = NULL;
	int cc = 0, bufcc = 0;
	u_char buf[BUFSIZ];
	size_t cnt = 0;
	int error = 0;

again:
	if ((tp->t_state&TS_ISOPEN) == 0)
		goto block;
	if (pti->pt_flags & PF_REMOTE) {
		if (tp->t_canq.c_cc)
			goto block;
		while (uio->uio_resid > 0 && tp->t_canq.c_cc < TTYHOG - 1) {
			if (cc == 0) {
				cc = MIN(uio->uio_resid, BUFSIZ);
				cc = min(cc, TTYHOG - 1 - tp->t_canq.c_cc);
				if (cc > bufcc)
					bufcc = cc;
				cp = buf;
				error = uiomove(cp, cc, uio);
				if (error)
					goto done;
				/* check again for safety */
				if ((tp->t_state&TS_ISOPEN) == 0) {
					error = EIO;
					goto done;
				}
			}
			if (cc)
				(void) b_to_q((char *)cp, cc, &tp->t_canq);
			cc = 0;
		}
		(void) putc(0, &tp->t_canq);
		ttwakeup(tp);
		wakeup(&tp->t_canq);
		goto done;
	}
	while (uio->uio_resid > 0) {
		if (cc == 0) {
			cc = MIN(uio->uio_resid, BUFSIZ);
			if (cc > bufcc)
				bufcc = cc;
			cp = buf;
			error = uiomove(cp, cc, uio);
			if (error)
				goto done;
			/* check again for safety */
			if ((tp->t_state&TS_ISOPEN) == 0) {
				error = EIO;
				goto done;
			}
		}
		bufcc = cc;
		while (cc > 0) {
			if ((tp->t_rawq.c_cc + tp->t_canq.c_cc) >= TTYHOG - 2 &&
			   (tp->t_canq.c_cc > 0 || !ISSET(tp->t_lflag, ICANON))) {
				wakeup(&tp->t_rawq);
				goto block;
			}
			(*linesw[tp->t_line].l_rint)(*cp++, tp);
			cnt++;
			cc--;
		}
		cc = 0;
	}
	goto done;
block:
	/*
	 * Come here to wait for slave to open, for space
	 * in outq, or space in rawq.
	 */
	if ((tp->t_state&TS_CARR_ON) == 0) {
		error = EIO;
		goto done;
	}
	if (flag & IO_NDELAY) {
		/* adjust for data copied in but not written */
		uio->uio_resid += cc;
		if (cnt == 0)
			error = EWOULDBLOCK;
		goto done;
	}
	error = tsleep(&tp->t_rawq.c_cf, TTOPRI | PCATCH,
	    ttyout, 0);
	if (error == 0)
		goto again;

	/* adjust for data copied in but not written */
	uio->uio_resid += cc;
done:
	if (bufcc)
		bzero(buf, bufcc);
	return (error);
}
Ejemplo n.º 5
0
/*
 * Write to TTY.
 * No locks may be held.
 * Calls device start routine; must already be on master if
 * device needs to run on master.
 */
io_return_t char_write(
	register struct tty *	tp,
	register io_req_t	ior)
{
	spl_t		s;
	register int	count;
	register char	*data;
	vm_offset_t	addr;
	io_return_t	rc = D_SUCCESS;

	data  = ior->io_data;
	count = ior->io_count;
	if (count == 0)
	    return rc;

	if (!(ior->io_op & IO_INBAND)) {
	    /*
	     * Copy out-of-line data into kernel address space.
	     * Since data is copied as page list, it will be
	     * accessible.
	     */
	    vm_map_copy_t copy = (vm_map_copy_t) data;
	    kern_return_t kr;

	    kr = vm_map_copyout(device_io_map, &addr, copy);
	    if (kr != KERN_SUCCESS)
		return kr;
	    data = (char *) addr;
	}

	/*
	 * Check for tty operating.
	 */
	s = spltty();
	simple_lock(&tp->t_lock);

	if ((tp->t_state & TS_CARR_ON) == 0) {

	    if ((tp->t_state & TS_ONDELAY) == 0) {
		/*
		 * No delayed writes - tell caller that device is down
		 */
		rc = D_IO_ERROR;
		goto out;
	    }

	    if (ior->io_mode & D_NOWAIT) {
		rc = D_WOULD_BLOCK;
		goto out;
	    }
	}

	/*
	 * Copy data into the output buffer.
	 * Report the amount not copied.
	 */

	ior->io_residual = b_to_q(data, count, &tp->t_outq);

	/*
	 * Start hardware output.
	 */

	tp->t_state &= ~TS_TTSTOP;
	tty_output(tp);

	if (tp->t_outq.c_cc > TTHIWAT(tp) ||
	    (tp->t_state & TS_CARR_ON) == 0) {

	    /*
	     * Do not send reply until some characters have been sent.
	     */
	    ior->io_dev_ptr = (char *)tp;
	    queue_delayed_reply(&tp->t_delayed_write, ior, char_write_done);

	    rc = D_IO_QUEUED;
	}
out:
	simple_unlock(&tp->t_lock);
	splx(s);

	if (!(ior->io_op & IO_INBAND))
	    (void) vm_deallocate(device_io_map, addr, ior->io_count);
	return rc;
}
Ejemplo n.º 6
0
/*
 * I/O ops
 */
static	int
ptcwrite(struct dev_write_args *ap)
{
	cdev_t dev = ap->a_head.a_dev;
	struct tty *tp = dev->si_tty;
	u_char *cp = NULL;
	int cc = 0;
	u_char locbuf[BUFSIZ];
	int cnt = 0;
	struct pt_ioctl *pti = dev->si_drv1;
	int error = 0;

	lwkt_gettoken(&tty_token);
again:
	if ((tp->t_state&TS_ISOPEN) == 0)
		goto block;
	if (pti->pt_flags & PF_REMOTE) {
		if (tp->t_canq.c_cc)
			goto block;
		while ((ap->a_uio->uio_resid > 0 || cc > 0) &&
		       tp->t_canq.c_cc < TTYHOG - 1) {
			if (cc == 0) {
				cc = (int)szmin(ap->a_uio->uio_resid, BUFSIZ);
				cc = imin(cc, TTYHOG - 1 - tp->t_canq.c_cc);
				cp = locbuf;
				error = uiomove(cp, (size_t)cc, ap->a_uio);
				if (error) {
					lwkt_reltoken(&tty_token);
					return (error);
				}
				/* check again for safety */
				if ((tp->t_state & TS_ISOPEN) == 0) {
					/* adjust as usual */
					ap->a_uio->uio_resid += cc;
					lwkt_reltoken(&tty_token);
					return (EIO);
				}
			}
			if (cc > 0) {
				cc = b_to_q((char *)cp, cc, &tp->t_canq);
				/*
				 * XXX we don't guarantee that the canq size
				 * is >= TTYHOG, so the above b_to_q() may
				 * leave some bytes uncopied.  However, space
				 * is guaranteed for the null terminator if
				 * we don't fail here since (TTYHOG - 1) is
				 * not a multiple of CBSIZE.
				 */
				if (cc > 0)
					break;
			}
		}
		/* adjust for data copied in but not written */
		ap->a_uio->uio_resid += cc;
		clist_putc(0, &tp->t_canq);
		ttwakeup(tp);
		wakeup(TSA_PTS_READ(tp));
		lwkt_reltoken(&tty_token);
		return (0);
	}
	while (ap->a_uio->uio_resid > 0 || cc > 0) {
		if (cc == 0) {
			cc = (int)szmin(ap->a_uio->uio_resid, BUFSIZ);
			cp = locbuf;
			error = uiomove(cp, (size_t)cc, ap->a_uio);
			if (error) {
				lwkt_reltoken(&tty_token);
				return (error);
			}
			/* check again for safety */
			if ((tp->t_state & TS_ISOPEN) == 0) {
				/* adjust for data copied in but not written */
				ap->a_uio->uio_resid += cc;
				lwkt_reltoken(&tty_token);
				return (EIO);
			}
		}
		while (cc > 0) {
			if ((tp->t_rawq.c_cc + tp->t_canq.c_cc) >= TTYHOG - 2 &&
			   (tp->t_canq.c_cc > 0 || !(tp->t_lflag&ICANON))) {
				wakeup(TSA_HUP_OR_INPUT(tp));
				goto block;
			}
			(*linesw[tp->t_line].l_rint)(*cp++, tp);
			cnt++;
			cc--;
		}
		cc = 0;
	}
	lwkt_reltoken(&tty_token);
	return (0);
block:
	/*
	 * Come here to wait for slave to open, for space
	 * in outq, or space in rawq, or an empty canq.
	 */
	if ((tp->t_state & TS_CONNECTED) == 0) {
		/* adjust for data copied in but not written */
		ap->a_uio->uio_resid += cc;
		lwkt_reltoken(&tty_token);
		return (EIO);
	}
	if (ap->a_ioflag & IO_NDELAY) {
		/* adjust for data copied in but not written */
		ap->a_uio->uio_resid += cc;
		if (cnt == 0) {
			lwkt_reltoken(&tty_token);
			return (EWOULDBLOCK);
		}
		lwkt_reltoken(&tty_token);
		return (0);
	}
	error = tsleep(TSA_PTC_WRITE(tp), PCATCH, "ptcout", 0);
	if (error) {
		/* adjust for data copied in but not written */
		ap->a_uio->uio_resid += cc;
		lwkt_reltoken(&tty_token);
		return (error);
	}
	goto again;
}
Ejemplo n.º 7
0
Static void
ucomreadcb(usbd_xfer_handle xfer, usbd_private_handle p, usbd_status status)
{
	struct ucom_softc *sc = (struct ucom_softc *)p;
	struct tty *tp = sc->sc_tty;
	int (*rint) (int c, struct tty *tp) = linesw[tp->t_line].l_rint;
	usbd_status err;
	u_int32_t cc;
	u_char *cp;
	int lostcc;
	int s;

	DPRINTF(("ucomreadcb: status = %d\n", status));

	if (status != USBD_NORMAL_COMPLETION) {
		if (!(sc->sc_state & UCS_RXSTOP))
			printf("%s: ucomreadcb: %s\n",
			       USBDEVNAME(sc->sc_dev), usbd_errstr(status));
		if (status == USBD_STALLED)
			usbd_clear_endpoint_stall_async(sc->sc_bulkin_pipe);
		/* XXX we should restart after some delay. */
		return;
	}

	usbd_get_xfer_status(xfer, NULL, (void **)&cp, &cc, NULL);
	DPRINTF(("ucomreadcb: got %d chars, tp = %p\n", cc, tp));
	if (cc == 0)
		goto resubmit;

	if (sc->sc_callback->ucom_read != NULL)
		sc->sc_callback->ucom_read(sc->sc_parent, sc->sc_portno,
					   &cp, &cc);

	if (cc > sc->sc_ibufsize) {
		printf("%s: invalid receive data size, %d chars\n",
		       USBDEVNAME(sc->sc_dev), cc);
		goto resubmit;
	}
	if (cc < 1)
		goto resubmit;

	s = spltty();
	if (tp->t_state & TS_CAN_BYPASS_L_RINT) {
		if (tp->t_rawq.c_cc + cc > tp->t_ihiwat
		    && (sc->sc_state & UCS_RTS_IFLOW
			|| tp->t_iflag & IXOFF)
		    && !(tp->t_state & TS_TBLOCK))
			ttyblock(tp);
		lostcc = b_to_q((char *)cp, cc, &tp->t_rawq);
		tp->t_rawcc += cc;
		ttwakeup(tp);
		if (tp->t_state & TS_TTSTOP
		    && (tp->t_iflag & IXANY
			|| tp->t_cc[VSTART] == tp->t_cc[VSTOP])) {
			tp->t_state &= ~TS_TTSTOP;
			tp->t_lflag &= ~FLUSHO;
			ucomstart(tp);
		}
		if (lostcc > 0)
			printf("%s: lost %d chars\n", USBDEVNAME(sc->sc_dev),
			       lostcc);
	} else {
		/* Give characters to tty layer. */
		while (cc > 0) {
			DPRINTFN(7, ("ucomreadcb: char = 0x%02x\n", *cp));
			if ((*rint)(*cp, tp) == -1) {
				/* XXX what should we do? */
				printf("%s: lost %d chars\n",
				       USBDEVNAME(sc->sc_dev), cc);
				break;
			}
			cc--;
			cp++;
		}
	}
	splx(s);

    resubmit:
	err = ucomstartread(sc);
	if (err) {
		printf("%s: read start failed\n", USBDEVNAME(sc->sc_dev));
		/* XXX what should we dow now? */
	}

	if ((sc->sc_state & UCS_RTS_IFLOW) && !ISSET(sc->sc_mcr, UMCR_RTS)
	    && !(tp->t_state & TS_TBLOCK))
		ucomctl(sc, UMCR_RTS, DMBIS);
}
Ejemplo n.º 8
0
/*
 * NOTE: Must be called with tty_token held
 */
static void
rp_do_receive(struct rp_port *rp, struct tty *tp,
			CHANNEL_t *cp, unsigned int ChanStatus)
{
	unsigned	int	CharNStat;
	int	ToRecv, wRecv, ch, ttynocopy;

	ASSERT_LWKT_TOKEN_HELD(&tty_token);
	ToRecv = sGetRxCnt(cp);
	if(ToRecv == 0)
		return;

/*	If status indicates there are errored characters in the
	FIFO, then enter status mode (a word in FIFO holds
	characters and status)
*/

	if(ChanStatus & (RXFOVERFL | RXBREAK | RXFRAME | RXPARITY)) {
		if(!(ChanStatus & STATMODE)) {
			ChanStatus |= STATMODE;
			sEnRxStatusMode(cp);
		}
	}
/*
	if we previously entered status mode then read down the
	FIFO one word at a time, pulling apart the character and
	the status. Update error counters depending on status.
*/
	if(ChanStatus & STATMODE) {
		while(ToRecv) {
			if(tp->t_state & TS_TBLOCK) {
				break;
			}
			CharNStat = rp_readch2(cp,sGetTxRxDataIO(cp));
			ch = CharNStat & 0xff;

			if((CharNStat & STMBREAK) || (CharNStat & STMFRAMEH))
				ch |= TTY_FE;
			else if (CharNStat & STMPARITYH)
				ch |= TTY_PE;
			else if (CharNStat & STMRCVROVRH)
				rp->rp_overflows++;

			(*linesw[tp->t_line].l_rint)(ch, tp);
			ToRecv--;
		}
/*
	After emtying FIFO in status mode, turn off status mode
*/

		if(sGetRxCnt(cp) == 0) {
			sDisRxStatusMode(cp);
		}
	} else {
		/*
		 * Avoid the grotesquely inefficient lineswitch routine
		 * (ttyinput) in "raw" mode.  It usually takes about 450
		 * instructions (that's without canonical processing or echo!).
		 * slinput is reasonably fast (usually 40 instructions plus
		 * call overhead).
		 */
		ToRecv = sGetRxCnt(cp);
		if ( tp->t_state & TS_CAN_BYPASS_L_RINT ) {
			if ( ToRecv > RXFIFO_SIZE ) {
				ToRecv = RXFIFO_SIZE;
			}
			wRecv = ToRecv >> 1;
			if ( wRecv ) {
				rp_readmultich2(cp,sGetTxRxDataIO(cp),(u_int16_t *)rp->RxBuf,wRecv);
			}
			if ( ToRecv & 1 ) {
				((unsigned char *)rp->RxBuf)[(ToRecv-1)] = (u_char) rp_readch1(cp,sGetTxRxDataIO(cp));
			}
			tk_nin += ToRecv;
			tk_rawcc += ToRecv;
			tp->t_rawcc += ToRecv;
			ttynocopy = b_to_q((char *)rp->RxBuf, ToRecv, &tp->t_rawq);
			ttwakeup(tp);
		} else {
			while (ToRecv) {
				if(tp->t_state & TS_TBLOCK) {
					break;
				}
				ch = (u_char) rp_readch1(cp,sGetTxRxDataIO(cp));
				crit_enter();
				(*linesw[tp->t_line].l_rint)(ch, tp);
				crit_exit();
				ToRecv--;
			}
		}
	}
Ejemplo n.º 9
0
void
si_intr(void *arg)
{
	struct si_softc *sc;
	struct si_port *pp;
	volatile struct si_channel *ccbp;
	struct tty *tp;
	volatile caddr_t maddr;
	BYTE op, ip;
	int x, card, port, n, i, isopen;
	volatile BYTE *z;
	BYTE c;

	sc = arg;

	DPRINT((0, arg == NULL ? DBG_POLL:DBG_INTR, "si_intr\n"));
	if (in_intr)
		return;
	in_intr = 1;

	/*
	 * When we get an int we poll all the channels and do ALL pending
	 * work, not just the first one we find. This allows all cards to
	 * share the same vector.
	 *
	 * XXX - But if we're sharing the vector with something that's NOT
	 * a SI/XIO/SX card, we may be making more work for ourselves.
	 */
	for (card = 0; card < si_numunits; card++) {
		sc = devclass_get_softc(si_devclass, card);
		if (sc == NULL || sc->sc_type == SIEMPTY)
			continue;

		/*
		 * First, clear the interrupt
		 */
		switch(sc->sc_type) {
		case SIHOST:
			maddr = sc->sc_maddr;
			((volatile struct si_reg *)maddr)->int_pending = 0;
							/* flag nothing pending */
			*(maddr+SIINTCL) = 0x00;	/* Set IRQ clear */
			*(maddr+SIINTCL_CL) = 0x00;	/* Clear IRQ clear */
			break;
		case SIHOST2:
			maddr = sc->sc_maddr;
			((volatile struct si_reg *)maddr)->int_pending = 0;
			*(maddr+SIPLIRQCLR) = 0x00;
			*(maddr+SIPLIRQCLR) = 0x10;
			break;
		case SIPCI:
			maddr = sc->sc_maddr;
			((volatile struct si_reg *)maddr)->int_pending = 0;
			*(maddr+SIPCIINTCL) = 0x0;
			break;
		case SIJETPCI:	/* fall through to JETISA case */
		case SIJETISA:
			maddr = sc->sc_maddr;
			((volatile struct si_reg *)maddr)->int_pending = 0;
			*(maddr+SIJETINTCL) = 0x0;
			break;
#ifdef DEV_EISA
		case SIEISA:
			maddr = sc->sc_maddr;
			((volatile struct si_reg *)maddr)->int_pending = 0;
			(void)inb(sc->sc_iobase + 3);
			break;
#endif
		case SIEMPTY:
		default:
			continue;
		}
		((volatile struct si_reg *)maddr)->int_scounter = 0;

		/*
		 * check each port
		 */
		for (pp = sc->sc_ports, port = 0; port < sc->sc_nport;
		     pp++, port++) {
			ccbp = pp->sp_ccb;
			tp = pp->sp_tty;

			/*
			 * See if a command has completed ?
			 */
			if (ccbp->hi_stat != pp->sp_pend) {
				DPRINT((pp, DBG_INTR,
					"si_intr hi_stat = 0x%x, pend = %d\n",
					ccbp->hi_stat, pp->sp_pend));
				switch(pp->sp_pend) {
				case LOPEN:
				case MPEND:
				case MOPEN:
				case CONFIG:
				case SBREAK:
				case EBREAK:
					pp->sp_pend = ccbp->hi_stat;
						/* sleeping in si_command */
					wakeup(&pp->sp_state);
					break;
				default:
					pp->sp_pend = ccbp->hi_stat;
				}
			}

			/*
			 * Continue on if it's closed
			 */
			if (ccbp->hi_stat == IDLE_CLOSE) {
				continue;
			}

			/*
			 * Do modem state change if not a local device
			 */
			si_modem_state(pp, tp, ccbp->hi_ip);

			/*
			 * Check to see if we should 'receive' characters.
			 */
			if (tp->t_state & TS_CONNECTED &&
			    tp->t_state & TS_ISOPEN)
				isopen = 1;
			else
				isopen = 0;

			/*
			 * Do input break processing
			 */
			if (ccbp->hi_state & ST_BREAK) {
				if (isopen) {
				    ttyld_rint(tp, TTY_BI);
				}
				ccbp->hi_state &= ~ST_BREAK;   /* A Bit iffy this */
				DPRINT((pp, DBG_INTR, "si_intr break\n"));
			}

			/*
			 * Do RX stuff - if not open then dump any characters.
			 * XXX: This is VERY messy and needs to be cleaned up.
			 *
			 * XXX: can we leave data in the host adapter buffer
			 * when the clists are full?  That may be dangerous
			 * if the user cannot get an interrupt signal through.
			 */

	more_rx:	/* XXX Sorry. the nesting was driving me bats! :-( */

			if (!isopen) {
				ccbp->hi_rxopos = ccbp->hi_rxipos;
				goto end_rx;
			}

			/*
			 * If the tty input buffers are blocked, stop emptying
			 * the incoming buffers and let the auto flow control
			 * assert..
			 */
			if (tp->t_state & TS_TBLOCK) {
				goto end_rx;
			}

			/*
			 * Process read characters if not skipped above
			 */
			op = ccbp->hi_rxopos;
			ip = ccbp->hi_rxipos;
			c = ip - op;
			if (c == 0) {
				goto end_rx;
			}

			n = c & 0xff;
			if (n > 250)
				n = 250;

			DPRINT((pp, DBG_INTR, "n = %d, op = %d, ip = %d\n",
						n, op, ip));

			/*
			 * Suck characters out of host card buffer into the
			 * "input staging buffer" - so that we dont leave the
			 * host card in limbo while we're possibly echoing
			 * characters and possibly flushing input inside the
			 * ldisc l_rint() routine.
			 */
			if (n <= SI_BUFFERSIZE - op) {

				DPRINT((pp, DBG_INTR, "\tsingle copy\n"));
				z = ccbp->hi_rxbuf + op;
				si_vbcopy(z, si_rxbuf, n);

				op += n;
			} else {
				x = SI_BUFFERSIZE - op;

				DPRINT((pp, DBG_INTR, "\tdouble part 1 %d\n", x));
				z = ccbp->hi_rxbuf + op;
				si_vbcopy(z, si_rxbuf, x);

				DPRINT((pp, DBG_INTR, "\tdouble part 2 %d\n",
					n - x));
				z = ccbp->hi_rxbuf;
				si_vbcopy(z, si_rxbuf + x, n - x);

				op += n;
			}

			/* clear collected characters from buffer */
			ccbp->hi_rxopos = op;

			DPRINT((pp, DBG_INTR, "n = %d, op = %d, ip = %d\n",
						n, op, ip));

			/*
			 * at this point...
			 * n = number of chars placed in si_rxbuf
			 */

			/*
			 * Avoid the grotesquely inefficient lineswitch
			 * routine (ttyinput) in "raw" mode. It usually
			 * takes about 450 instructions (that's without
			 * canonical processing or echo!). slinput is
			 * reasonably fast (usually 40 instructions
			 * plus call overhead).
			 */
			if (tp->t_state & TS_CAN_BYPASS_L_RINT) {

				/* block if the driver supports it */
				if (tp->t_rawq.c_cc + n >= SI_I_HIGH_WATER &&
				    (tp->t_cflag & CRTS_IFLOW ||
				     tp->t_iflag & IXOFF) &&
				    !(tp->t_state & TS_TBLOCK))
					ttyblock(tp);

				tk_nin += n;
				tk_rawcc += n;
				tp->t_rawcc += n;

				pp->sp_delta_overflows +=
				    b_to_q((char *)si_rxbuf, n, &tp->t_rawq);

				ttwakeup(tp);
				if (tp->t_state & TS_TTSTOP &&
				    (tp->t_iflag & IXANY ||
				     tp->t_cc[VSTART] == tp->t_cc[VSTOP])) {
					tp->t_state &= ~TS_TTSTOP;
					tp->t_lflag &= ~FLUSHO;
					si_start(tp);
				}
			} else {
				/*
				 * It'd be nice to not have to go through the
				 * function call overhead for each char here.
				 * It'd be nice to block input it, saving a
				 * loop here and the call/return overhead.
				 */
				for(x = 0; x < n; x++) {
					i = si_rxbuf[x];
					if (ttyld_rint(tp, i)
					     == -1) {
						pp->sp_delta_overflows++;
					}
				}
			}
			goto more_rx;	/* try for more until RXbuf is empty */

	end_rx:		/* XXX: Again, sorry about the gotos.. :-) */

			/*
			 * Do TX stuff
			 */
			ttyld_start(tp);

		} /* end of for (all ports on this controller) */
	} /* end of for (all controllers) */

	in_intr = 0;
	DPRINT((0, arg == NULL ? DBG_POLL:DBG_INTR, "end si_intr\n"));
}