[unix-history] / usr / src / sys / vax / mba / ht.c

/*
 * Copyright (c) 1982, 1986 Regents of the University of California.
 * All rights reserved.  The Berkeley software License Agreement
 * specifies the terms and conditions for redistribution.
 *
 *	@(#)ht.c	7.6 (Berkeley) %G%
 */

#include "tu.h"
#if NHT > 0
/*
 * TM03/TU?? tape driver
 *
 * TODO:
 *	cleanup messages on errors
 *	test ioctl's
 *	see how many rewind interrups we get if we kick when not at BOT
 *	fixup rle error on block tape code
 */
#include "param.h"
#include "systm.h"
#include "buf.h"
#include "conf.h"
#include "dir.h"
#include "file.h"
#include "user.h"
#include "map.h"
#include "ioctl.h"
#include "mtio.h"
#include "cmap.h"
#include "uio.h"
#include "tty.h"
#include "syslog.h"

#include "../machine/pte.h"
#include "../vax/cpu.h"
#include "mbareg.h"
#include "mbavar.h"
#include "htreg.h"

struct	buf	chtbuf[NHT];

short	httypes[] =
	{ MBDT_TM03, MBDT_TE16, MBDT_TU45, MBDT_TU77, 0 };
struct	mba_device *htinfo[NHT];
struct	mba_slave *tuinfo[NTU];
int	htattach(), htslave(), htustart(), htndtint(), htdtint();
struct	mba_driver htdriver =
    { htattach, htslave, htustart, 0, htdtint, htndtint,
      httypes, "ht", "tu", htinfo };

#define MASKREG(r)	((r) & 0xffff)

/* bits in minor device */
#define	TUUNIT(dev)	(minor(dev)&03)
#define	H_NOREWIND	04
#define	H_DENS(dev)	((minor(dev) >> 3) & 03)

#define HTUNIT(dev)	(tuinfo[TUUNIT(dev)]->ms_ctlr)

#define	INF	(daddr_t)1000000L	/* a block number that wont exist */

struct	tu_softc {
	char	sc_openf;
	char	sc_flags;
	daddr_t	sc_blkno;
	daddr_t	sc_nxrec;
	u_short	sc_erreg;
	u_short	sc_dsreg;
	short	sc_resid;
	short	sc_dens;
	struct	tty *sc_ttyp;		/* record user's tty for errors */
	int	sc_blks;	/* number of I/O operations since open */
	int	sc_softerrs;	/* number of soft I/O errors since open */
} tu_softc[NTU];

/*
 * Bits for sc_flags.
 */
#define	H_WRITTEN 1	/* last operation was a write */
#define H_ERASED  2	/* last write retry was an erase gap */
#define H_REWIND  4	/* last unit start was a rewind */

char	hter_bits[] = HTER_BITS;
char	htds_bits[] = HTDS_BITS;

/*ARGSUSED*/
htattach(mi)
	struct mba_device *mi;
{

}

htslave(mi, ms, sn)
	struct mba_device *mi;
	struct mba_slave *ms;
	int sn;
{
	register struct htdevice *htaddr = (struct htdevice *)mi->mi_drv;

	htaddr->httc = sn;
	if (htaddr->htdt & HTDT_SPR) {
		tuinfo[ms->ms_unit] = ms;
		return (1);
	} else
		return (0);
}

int	htdens[4] = { HTTC_800BPI, HTTC_1600BPI, HTTC_6250BPI, HTTC_800BPI };

htopen(dev, flag)
	dev_t dev;
	int flag;
{
	register int tuunit;
	register struct tu_softc *sc;
	register struct mba_slave *ms;
	int olddens, dens;

	tuunit = TUUNIT(dev);
	if (tuunit >= NTU || (ms = tuinfo[tuunit]) == NULL ||
	    ms->ms_alive == 0 || htinfo[ms->ms_ctlr]->mi_alive == 0)
		return (ENXIO);
	if ((sc = &tu_softc[tuunit])->sc_openf)
		return (EBUSY);
	sc->sc_openf = 1;
	olddens = sc->sc_dens;
	dens = sc->sc_dens = htdens[H_DENS(dev)] | HTTC_PDP11 | ms->ms_slave;
	htcommand(dev, HT_SENSE, 1);
	sc->sc_dens = olddens;
	if ((sc->sc_dsreg & HTDS_MOL) == 0) {
		sc->sc_openf = 0;
		uprintf("tu%d: not online\n", tuunit);
		return (EIO);
	}
	if ((flag&FWRITE) && (sc->sc_dsreg&HTDS_WRL)) {
		sc->sc_openf = 0;
		uprintf("tu%d: no write ring\n", tuunit);
		return (EIO);
	}
	if ((sc->sc_dsreg & HTDS_BOT) == 0 && (flag&FWRITE) &&
	    dens != sc->sc_dens) {
		sc->sc_openf = 0;
		uprintf("tu%d: can't change density in mid-tape\n", tuunit);
		return (EIO);
	}
	sc->sc_blkno = (daddr_t)0;
	sc->sc_nxrec = INF;
	sc->sc_flags = 0;
	sc->sc_dens = dens;
	sc->sc_blks = 0;
	sc->sc_softerrs = 0;
	sc->sc_ttyp = u.u_ttyp;
	return (0);
}

htclose(dev, flag)
	register dev_t dev;
	register flag;
{
	register struct tu_softc *sc = &tu_softc[TUUNIT(dev)];

	if (flag == FWRITE || ((flag&FWRITE) && (sc->sc_flags&H_WRITTEN))) {
		htcommand(dev, HT_WEOF, 1);
		htcommand(dev, HT_WEOF, 1);
		htcommand(dev, HT_SREV, 1);
	}
	if ((minor(dev)&H_NOREWIND) == 0)
		htcommand(dev, HT_REW, 0);
	if (sc->sc_blks > 100 && sc->sc_softerrs > sc->sc_blks / 100)
		log(LOG_INFO, "tu%d: %d soft errors in %d blocks\n",
		    TUUNIT(dev), sc->sc_softerrs, sc->sc_blks);
	sc->sc_openf = 0;
}

htcommand(dev, com, count)
	dev_t dev;
	int com, count;
{
	register struct buf *bp;
	register int s;

	bp = &chtbuf[HTUNIT(dev)];
	s = spl5();
	while (bp->b_flags&B_BUSY) {
		if(bp->b_repcnt == 0 && (bp->b_flags&B_DONE))
			break;
		bp->b_flags |= B_WANTED;
		sleep((caddr_t)bp, PRIBIO);
	}
	bp->b_flags = B_BUSY|B_READ;
	splx(s);
	bp->b_dev = dev;
	bp->b_command = com;
	bp->b_repcnt = count;
	bp->b_blkno = 0;
	htstrategy(bp);
	if (count == 0)
		return;
	iowait(bp);
	if (bp->b_flags&B_WANTED)
		wakeup((caddr_t)bp);
	bp->b_flags &= B_ERROR;
}

htstrategy(bp)
	register struct buf *bp;
{
	register struct mba_device *mi = htinfo[HTUNIT(bp->b_dev)];
	register struct buf *dp;
	register int s;

	bp->av_forw = NULL;
	dp = &mi->mi_tab;
	s = spl5();
	if (dp->b_actf == NULL)
		dp->b_actf = bp;
	else
		dp->b_actl->av_forw = bp;
	dp->b_actl = bp;
	if (dp->b_active == 0)
		mbustart(mi);
	splx(s);
}

htustart(mi)
	register struct mba_device *mi;
{
	register struct htdevice *htaddr =
	    (struct htdevice *)mi->mi_drv;
	register struct buf *bp = mi->mi_tab.b_actf;
	register struct tu_softc *sc = &tu_softc[TUUNIT(bp->b_dev)];
	daddr_t blkno;

	htaddr->httc = sc->sc_dens;
#ifdef	notdef
	/* unneeded, may hang controller */
	if (bp == &chtbuf[HTUNIT(bp->b_dev)] && bp->b_command == HT_SENSE) {
		htaddr->htcs1 = HT_SENSE|HT_GO;
		mbclrattn(mi);
	}
#endif
	sc->sc_dsreg = htaddr->htds;
	sc->sc_erreg = htaddr->hter;
	sc->sc_resid = htaddr->htfc;
	sc->sc_flags &= ~(H_WRITTEN|H_REWIND);
	if ((htaddr->htdt & HTDT_SPR) == 0 || (htaddr->htds & HTDS_MOL) == 0)
		if (sc->sc_openf > 0)
			sc->sc_openf = -1;
	if (sc->sc_openf < 0) {
		bp->b_flags |= B_ERROR;
		return (MBU_NEXT);
	}
	if (bp != &chtbuf[HTUNIT(bp->b_dev)]) {
		/* transfer: check positioning */
		if (bp->b_flags & B_RAW) {
			/* raw transfer: record position for retry */
			if (mi->mi_tab.b_errcnt == 0) {
				sc->sc_blkno = bdbtofsb(bp->b_blkno);
				sc->sc_nxrec = sc->sc_blkno + 1;
			}
		} else {
			if (bdbtofsb(bp->b_blkno) > sc->sc_nxrec) {
				bp->b_flags |= B_ERROR;
				bp->b_error = ENXIO;
				return (MBU_NEXT);
			}
			if (bdbtofsb(bp->b_blkno) == sc->sc_nxrec &&
			    bp->b_flags&B_READ) {
				bp->b_resid = bp->b_bcount;
				clrbuf(bp);
				return (MBU_NEXT);
			}
			if ((bp->b_flags&B_READ)==0)
				sc->sc_nxrec = bdbtofsb(bp->b_blkno) + 1;
		}
	} else {
		if (bp->b_command == HT_SENSE)
			return (MBU_NEXT);
		if (bp->b_command == HT_REW)
			sc->sc_flags |= H_REWIND;
		else
			htaddr->htfc = -bp->b_bcount;
		htaddr->htcs1 = bp->b_command|HT_GO;
		return (MBU_STARTED);
	}
	if ((blkno = sc->sc_blkno) == bdbtofsb(bp->b_blkno)) {
		htaddr->htfc = -bp->b_bcount;
		if ((bp->b_flags&B_READ) == 0) {
			if (mi->mi_tab.b_errcnt) {
				if ((sc->sc_flags & H_ERASED) == 0) {
					sc->sc_flags |= H_ERASED;
					htaddr->htcs1 = HT_ERASE | HT_GO;
					return (MBU_STARTED);
				}
				sc->sc_flags &= ~H_ERASED;
			}
			if (htaddr->htds & HTDS_EOT) {
				bp->b_resid = bp->b_bcount;
				bp->b_flags |= B_ERROR;
				return (MBU_NEXT);
			}
		}
		return (MBU_DODATA);
	}
	if (blkno < bdbtofsb(bp->b_blkno)) {
		htaddr->htfc = blkno - bdbtofsb(bp->b_blkno);
		htaddr->htcs1 = HT_SFORW|HT_GO;
	} else {
		htaddr->htfc = bdbtofsb(bp->b_blkno) - blkno;
		htaddr->htcs1 = HT_SREV|HT_GO;
	}
	return (MBU_STARTED);
}

htdtint(mi, mbsr)
	register struct mba_device *mi;
	int mbsr;
{
	register struct htdevice *htaddr = (struct htdevice *)mi->mi_drv;
	register struct buf *bp = mi->mi_tab.b_actf;
	register struct tu_softc *sc;
	int ds, er, mbs;

	sc = &tu_softc[TUUNIT(bp->b_dev)];
	ds = sc->sc_dsreg = MASKREG(htaddr->htds);
	er = sc->sc_erreg = MASKREG(htaddr->hter);
	sc->sc_resid = MASKREG(htaddr->htfc);
	mbs = mbsr;
	sc->sc_blkno++;
	if((bp->b_flags & B_READ) == 0)
		sc->sc_flags |= H_WRITTEN;
	if ((ds&(HTDS_ERR|HTDS_MOL)) != HTDS_MOL || mbs & MBSR_EBITS) {
		htaddr->htcs1 = HT_DCLR|HT_GO;
		mbclrattn(mi);
		if (bp->b_flags & B_RAW) {
			er &= ~HTER_FCE;
			mbs &= ~(MBSR_DTABT|MBSR_MBEXC);
		}
		if (bp->b_flags & B_READ && ds & HTDS_PES)
			er &= ~(HTER_CSITM|HTER_CORCRC);
		if (er&HTER_HARD || mbs&MBSR_EBITS || (ds&HTDS_MOL) == 0 ||
		    er && ++mi->mi_tab.b_errcnt >= 7) {
			if ((ds & HTDS_MOL) == 0 && sc->sc_openf > 0)
				sc->sc_openf = -1;
			if ((er&HTER_HARD) == HTER_FCE &&
			    (mbs&MBSR_EBITS) == (MBSR_DTABT|MBSR_MBEXC) &&
			    (ds&HTDS_MOL))
				goto noprint;
			tprintf(sc->sc_ttyp, "tu%d: hard error bn%d mbsr=%b er=%b ds=%b\n",
			    TUUNIT(bp->b_dev), bp->b_blkno,
			    mbsr, mbsr_bits,
			    sc->sc_erreg, hter_bits,
			    sc->sc_dsreg, htds_bits);
noprint:
			bp->b_flags |= B_ERROR;
			return (MBD_DONE);
		}
		if (er)
			return (MBD_RETRY);
	}
	bp->b_resid = 0;
	sc->sc_blks++;
	if (mi->mi_tab.b_errcnt)
		sc->sc_softerrs++;
	if (bp->b_flags & B_READ)
		if (ds&HTDS_TM) {		/* must be a read, right? */
			bp->b_resid = bp->b_bcount;
			sc->sc_nxrec = bdbtofsb(bp->b_blkno);
		} else if(bp->b_bcount > MASKREG(htaddr->htfc))
			bp->b_resid = bp->b_bcount - MASKREG(htaddr->htfc);
	return (MBD_DONE);
}

htndtint(mi)
	register struct mba_device *mi;
{
	register struct htdevice *htaddr = (struct htdevice *)mi->mi_drv;
	register struct buf *bp = mi->mi_tab.b_actf;
	register struct tu_softc *sc;
	int er, ds, fc;

	ds = MASKREG(htaddr->htds);
	er = MASKREG(htaddr->hter);
	fc = MASKREG(htaddr->htfc);
	if (er) {
		htaddr->htcs1 = HT_DCLR|HT_GO;
		mbclrattn(mi);
	}
	if (bp == 0)
		return (MBN_SKIP);
	sc = &tu_softc[TUUNIT(bp->b_dev)];
	sc->sc_dsreg = ds;
	sc->sc_erreg = er;
	sc->sc_resid = fc;
	if (bp == &chtbuf[HTUNIT(bp->b_dev)]) {
		switch ((int)bp->b_command) {
		case HT_REWOFFL:
			/* offline is on purpose; don't do anything special */
			ds |= HTDS_MOL;	
			break;
		case HT_SREV:
			/* if backspace file hit bot, its not an error */
		        if (er == (HTER_NEF|HTER_FCE) && ds&HTDS_BOT &&
			    bp->b_repcnt == INF)
				er &= ~HTER_NEF;
			break;
		}
		er &= ~HTER_FCE;
		if (er == 0)
			ds &= ~HTDS_ERR;
	}
	if ((ds & (HTDS_ERR|HTDS_MOL)) != HTDS_MOL) {
		if ((ds & HTDS_MOL) == 0 && sc->sc_openf > 0)
			sc->sc_openf = -1;
		tprintf(sc->sc_ttyp, "tu%d: hard error bn%d er=%b ds=%b\n",
		    TUUNIT(bp->b_dev), bp->b_blkno,
		    sc->sc_erreg, hter_bits, sc->sc_dsreg, htds_bits);
		bp->b_flags |= B_ERROR;
		return (MBN_DONE);
	}
	if (bp == &chtbuf[HTUNIT(bp->b_dev)]) {
		if (sc->sc_flags & H_REWIND)
			return (ds & HTDS_BOT ? MBN_DONE : MBN_RETRY);
		bp->b_resid = -sc->sc_resid;
		return (MBN_DONE);
	}
	if (ds & HTDS_TM)
		if (sc->sc_blkno > bdbtofsb(bp->b_blkno)) {
			sc->sc_nxrec = bdbtofsb(bp->b_blkno) - fc;
			sc->sc_blkno = sc->sc_nxrec;
		} else {
			sc->sc_blkno = bdbtofsb(bp->b_blkno) + fc;
			sc->sc_nxrec = sc->sc_blkno - 1;
		}
	else
		sc->sc_blkno = bdbtofsb(bp->b_blkno);
	return (MBN_RETRY);
}

/*ARGSUSED*/
htioctl(dev, cmd, data, flag)
	dev_t dev;
	int cmd;
	caddr_t data;
	int flag;
{
	register struct tu_softc *sc = &tu_softc[TUUNIT(dev)];
	register struct buf *bp = &chtbuf[HTUNIT(dev)];
	register callcount;
	int fcount;
	struct mtop *mtop;
	struct mtget *mtget;
	/* we depend of the values and order of the MT codes here */
	static htops[] =
   {HT_WEOF,HT_SFORW,HT_SREV,HT_SFORW,HT_SREV,HT_REW,HT_REWOFFL,HT_SENSE};

	switch (cmd) {

	case MTIOCTOP:	/* tape operation */
		mtop = (struct mtop *)data;
		switch (mtop->mt_op) {

		case MTWEOF:
			callcount = mtop->mt_count;
			fcount = 1;
			break;

		case MTFSF: case MTBSF:
			callcount = mtop->mt_count;
			fcount = INF;
			break;

		case MTFSR: case MTBSR:
			callcount = 1;
			fcount = mtop->mt_count;
			break;

		case MTREW: case MTOFFL:
			callcount = 1;
			fcount = 1;
			break;

		default:
			return (ENXIO);
		}
		if (callcount <= 0 || fcount <= 0)
			return (EINVAL);
		while (--callcount >= 0) {
			htcommand(dev, htops[mtop->mt_op], fcount);
			if ((mtop->mt_op == MTFSR || mtop->mt_op == MTBSR) &&
			    bp->b_resid)
				return (EIO);
			if ((bp->b_flags&B_ERROR) || sc->sc_dsreg&HTDS_BOT)
				break;
		}
		return (geterror(bp));	

	case MTIOCGET:
		mtget = (struct mtget *)data;
		mtget->mt_dsreg = sc->sc_dsreg;
		mtget->mt_erreg = sc->sc_erreg;
		mtget->mt_resid = sc->sc_resid;
		mtget->mt_type = MT_ISHT;
		break;

	default:
		return (ENXIO);
	}
	return (0);
}

#define	DBSIZE	20

htdump()
{
	register struct mba_device *mi;
	register struct mba_regs *mp;
	register struct htdevice *htaddr;
	int blk, num;
	int start;

	start = 0;
	num = maxfree;
#define	phys(a,b)		((b)((int)(a)&0x7fffffff))
	if (htinfo[0] == 0)
		return (ENXIO);
	mi = phys(htinfo[0], struct mba_device *);
	mp = phys(mi->mi_hd, struct mba_hd *)->mh_physmba;
	mp->mba_cr = MBCR_IE;
	htaddr = (struct htdevice *)&mp->mba_drv[mi->mi_drive];
	htaddr->httc = HTTC_PDP11|HTTC_1600BPI;
	htaddr->htcs1 = HT_DCLR|HT_GO;
	while (num > 0) {
		blk = num > DBSIZE ? DBSIZE : num;
		htdwrite(start, blk, htaddr, mp);
		start += blk;
		num -= blk;
	}
	hteof(htaddr);
	hteof(htaddr);
	htwait(htaddr);
	if (htaddr->htds&HTDS_ERR)
		return (EIO);
	htaddr->htcs1 = HT_REW|HT_GO;
	return (0);
}

htdwrite(dbuf, num, htaddr, mp)
	register dbuf, num;
	register struct htdevice *htaddr;
	struct mba_regs *mp;
{
	register struct pte *io;
	register int i;

	htwait(htaddr);
	io = mp->mba_map;
	for (i = 0; i < num; i++)
		*(int *)io++ = dbuf++ | PG_V;
	htaddr->htfc = -(num*NBPG);
	mp->mba_sr = -1;
	mp->mba_bcr = -(num*NBPG);
	mp->mba_var = 0;
	htaddr->htcs1 = HT_WCOM|HT_GO;
}

htwait(htaddr)
	struct htdevice *htaddr;
{
	register s;

	do
		s = htaddr->htds;
	while ((s & HTDS_DRY) == 0);
}

hteof(htaddr)
	struct htdevice *htaddr;
{

	htwait(htaddr);
	htaddr->htcs1 = HT_WEOF|HT_GO;
}
#endif
Commit	Line	Data
da7c5cc6	1	/*
0880b18e	2	* Copyright (c) 1982, 1986 Regents of the University of California.
da7c5cc6 KM	3	* All rights reserved. The Berkeley software License Agreement
	4	* specifies the terms and conditions for redistribution.
	5	*
5d4eae4d	6	* @(#)ht.c 7.6 (Berkeley) %G%
da7c5cc6	7	*/
0deaf016	8
89bd2f01	9	#include "tu.h"
a5cc519e	10	#if NHT > 0
786dff00	11	/*
fcc37d29	12	* TM03/TU?? tape driver
d565635a BJ	13	*
d565635a BJ	14	* TODO:
3ee331b1	15	* cleanup messages on errors
d565635a BJ	16	* test ioctl's
d565635a BJ	17	* see how many rewind interrups we get if we kick when not at BOT
3ee331b1	18	* fixup rle error on block tape code
786dff00	19	*/
969e52ef JB	20	#include "param.h"
	21	#include "systm.h"
	22	#include "buf.h"
	23	#include "conf.h"
	24	#include "dir.h"
	25	#include "file.h"
	26	#include "user.h"
	27	#include "map.h"
	28	#include "ioctl.h"
	29	#include "mtio.h"
	30	#include "cmap.h"
	31	#include "uio.h"
48165e7b	32	#include "tty.h"
ef4fe5b8	33	#include "syslog.h"
786dff00	34
c457503f	35	#include "../machine/pte.h"
c895c266	36	#include "../vax/cpu.h"
969e52ef JB	37	#include "mbareg.h"
	38	#include "mbavar.h"
	39	#include "htreg.h"
fcc37d29	40
fcc37d29 BJ	41	struct buf chtbuf[NHT];
	42
	43	short httypes[] =
fc4d0a69	44	{ MBDT_TM03, MBDT_TE16, MBDT_TU45, MBDT_TU77, 0 };
89bd2f01	45	struct mba_device *htinfo[NHT];
e7efef59	46	struct mba_slave *tuinfo[NTU];
a0eab615	47	int htattach(), htslave(), htustart(), htndtint(), htdtint();
fcc37d29	48	struct mba_driver htdriver =
89bd2f01 BJ	49	{ htattach, htslave, htustart, 0, htdtint, htndtint,
89bd2f01 BJ	50	httypes, "ht", "tu", htinfo };
fcc37d29 BJ	51
	52	#define MASKREG(r) ((r) & 0xffff)
	53
	54	/* bits in minor device */
89bd2f01	55	#define TUUNIT(dev) (minor(dev)&03)
fcc37d29	56	#define H_NOREWIND 04
5d33b5c0	57	#define H_DENS(dev) ((minor(dev) >> 3) & 03)
786dff00	58
5d4eae4d	59	#define HTUNIT(dev) (tuinfo[TUUNIT(dev)]->ms_ctlr)
89bd2f01	60
fcc37d29 BJ	61	#define INF (daddr_t)1000000L /* a block number that wont exist */
fcc37d29 BJ	62
d565635a	63	struct tu_softc {
fcc37d29 BJ	64	char sc_openf;
	65	char sc_flags;
	66	daddr_t sc_blkno;
	67	daddr_t sc_nxrec;
	68	u_short sc_erreg;
	69	u_short sc_dsreg;
	70	short sc_resid;
	71	short sc_dens;
48165e7b	72	struct tty sc_ttyp; / record user's tty for errors */
c457503f MK	73	int sc_blks; /* number of I/O operations since open */
c457503f MK	74	int sc_softerrs; /* number of soft I/O errors since open */
d565635a	75	} tu_softc[NTU];
fcc37d29	76
fcc37d29 BJ	77	/*
	78	* Bits for sc_flags.
	79	*/
	80	#define H_WRITTEN 1 /* last operation was a write */
	81	#define H_ERASED 2 /* last write retry was an erase gap */
	82	#define H_REWIND 4 /* last unit start was a rewind */
786dff00	83
3ee331b1 BJ	84	char hter_bits[] = HTER_BITS;
	85	char htds_bits[] = HTDS_BITS;
	86
fcc37d29	87	/ARGSUSED/
89bd2f01 BJ	88	htattach(mi)
	89	struct mba_device *mi;
	90	{
	91
	92	}
	93
51250c66	94	htslave(mi, ms, sn)
89bd2f01 BJ	95	struct mba_device *mi;
89bd2f01 BJ	96	struct mba_slave *ms;
51250c66	97	int sn;
fcc37d29	98	{
64614526 BJ	99	register struct htdevice htaddr = (struct htdevice )mi->mi_drv;
64614526 BJ	100
51250c66	101	htaddr->httc = sn;
64614526	102	if (htaddr->htdt & HTDT_SPR) {
e7efef59	103	tuinfo[ms->ms_unit] = ms;
64614526 BJ	104	return (1);
	105	} else
	106	return (0);
fcc37d29	107	}
786dff00	108
5d33b5c0 MK	109	int htdens[4] = { HTTC_800BPI, HTTC_1600BPI, HTTC_6250BPI, HTTC_800BPI };
5d33b5c0 MK	110
786dff00	111	htopen(dev, flag)
fcc37d29 BJ	112	dev_t dev;
fcc37d29 BJ	113	int flag;
786dff00	114	{
d565635a	115	register int tuunit;
d565635a	116	register struct tu_softc *sc;
5d4eae4d	117	register struct mba_slave *ms;
cd470e1d	118	int olddens, dens;
786dff00	119
d565635a	120	tuunit = TUUNIT(dev);
5d4eae4d KB	121	if (tuunit >= NTU \|\| (ms = tuinfo[tuunit]) == NULL \|\|
5d4eae4d KB	122	ms->ms_alive == 0 \|\| htinfo[ms->ms_ctlr]->mi_alive == 0)
473a2e47	123	return (ENXIO);
1e6047bb MK	124	if ((sc = &tu_softc[tuunit])->sc_openf)
1e6047bb MK	125	return (EBUSY);
c457503f	126	sc->sc_openf = 1;
cd470e1d	127	olddens = sc->sc_dens;
5d4eae4d	128	dens = sc->sc_dens = htdens[H_DENS(dev)] \| HTTC_PDP11 \| ms->ms_slave;
cd470e1d BJ	129	htcommand(dev, HT_SENSE, 1);
cd470e1d BJ	130	sc->sc_dens = olddens;
61add2a3	131	if ((sc->sc_dsreg & HTDS_MOL) == 0) {
c457503f	132	sc->sc_openf = 0;
1d78646d	133	uprintf("tu%d: not online\n", tuunit);
473a2e47	134	return (EIO);
61add2a3 BJ	135	}
61add2a3 BJ	136	if ((flag&FWRITE) && (sc->sc_dsreg&HTDS_WRL)) {
c457503f	137	sc->sc_openf = 0;
1d78646d	138	uprintf("tu%d: no write ring\n", tuunit);
473a2e47	139	return (EIO);
61add2a3 BJ	140	}
	141	if ((sc->sc_dsreg & HTDS_BOT) == 0 && (flag&FWRITE) &&
	142	dens != sc->sc_dens) {
c457503f	143	sc->sc_openf = 0;
1d78646d	144	uprintf("tu%d: can't change density in mid-tape\n", tuunit);
473a2e47	145	return (EIO);
fcc37d29	146	}
fcc37d29 BJ	147	sc->sc_blkno = (daddr_t)0;
	148	sc->sc_nxrec = INF;
	149	sc->sc_flags = 0;
d565635a	150	sc->sc_dens = dens;
c457503f MK	151	sc->sc_blks = 0;
c457503f MK	152	sc->sc_softerrs = 0;
48165e7b	153	sc->sc_ttyp = u.u_ttyp;
473a2e47	154	return (0);
786dff00 BJ	155	}
	156
	157	htclose(dev, flag)
fcc37d29 BJ	158	register dev_t dev;
fcc37d29 BJ	159	register flag;
786dff00	160	{
d565635a	161	register struct tu_softc *sc = &tu_softc[TUUNIT(dev)];
786dff00	162
fcc37d29 BJ	163	if (flag == FWRITE \|\| ((flag&FWRITE) && (sc->sc_flags&H_WRITTEN))) {
	164	htcommand(dev, HT_WEOF, 1);
	165	htcommand(dev, HT_WEOF, 1);
	166	htcommand(dev, HT_SREV, 1);
786dff00	167	}
fcc37d29	168	if ((minor(dev)&H_NOREWIND) == 0)
fcc37d29	169	htcommand(dev, HT_REW, 0);
c457503f MK	170	if (sc->sc_blks > 100 && sc->sc_softerrs > sc->sc_blks / 100)
	171	log(LOG_INFO, "tu%d: %d soft errors in %d blocks\n",
	172	TUUNIT(dev), sc->sc_softerrs, sc->sc_blks);
fcc37d29	173	sc->sc_openf = 0;
786dff00 BJ	174	}
786dff00 BJ	175
fcc37d29 BJ	176	htcommand(dev, com, count)
	177	dev_t dev;
	178	int com, count;
786dff00 BJ	179	{
786dff00 BJ	180	register struct buf *bp;
2311123d	181	register int s;
786dff00	182
fcc37d29	183	bp = &chtbuf[HTUNIT(dev)];
2311123d	184	s = spl5();
fcc37d29	185	while (bp->b_flags&B_BUSY) {
9f1dae18	186	if(bp->b_repcnt == 0 && (bp->b_flags&B_DONE))
89bd2f01	187	break;
786dff00 BJ	188	bp->b_flags \|= B_WANTED;
	189	sleep((caddr_t)bp, PRIBIO);
	190	}
dc637456	191	bp->b_flags = B_BUSY\|B_READ;
2311123d	192	splx(s);
786dff00	193	bp->b_dev = dev;
fcc37d29 BJ	194	bp->b_command = com;
fcc37d29 BJ	195	bp->b_repcnt = count;
786dff00	196	bp->b_blkno = 0;
786dff00	197	htstrategy(bp);
fcc37d29 BJ	198	if (count == 0)
fcc37d29 BJ	199	return;
786dff00	200	iowait(bp);
fcc37d29	201	if (bp->b_flags&B_WANTED)
786dff00	202	wakeup((caddr_t)bp);
fcc37d29	203	bp->b_flags &= B_ERROR;
786dff00 BJ	204	}
	205
	206	htstrategy(bp)
fcc37d29	207	register struct buf *bp;
786dff00	208	{
d565635a	209	register struct mba_device *mi = htinfo[HTUNIT(bp->b_dev)];
fcc37d29	210	register struct buf *dp;
2311123d	211	register int s;
786dff00	212
786dff00	213	bp->av_forw = NULL;
fcc37d29	214	dp = &mi->mi_tab;
2311123d	215	s = spl5();
fcc37d29 BJ	216	if (dp->b_actf == NULL)
fcc37d29 BJ	217	dp->b_actf = bp;
786dff00	218	else
fcc37d29 BJ	219	dp->b_actl->av_forw = bp;
	220	dp->b_actl = bp;
	221	if (dp->b_active == 0)
	222	mbustart(mi);
2311123d	223	splx(s);
786dff00 BJ	224	}
786dff00 BJ	225
fcc37d29	226	htustart(mi)
89bd2f01	227	register struct mba_device *mi;
786dff00	228	{
fcc37d29 BJ	229	register struct htdevice *htaddr =
	230	(struct htdevice *)mi->mi_drv;
	231	register struct buf *bp = mi->mi_tab.b_actf;
d565635a	232	register struct tu_softc *sc = &tu_softc[TUUNIT(bp->b_dev)];
786dff00 BJ	233	daddr_t blkno;
786dff00 BJ	234
fcc37d29	235	htaddr->httc = sc->sc_dens;
244b8363 MK	236	#ifdef notdef
244b8363 MK	237	/* unneeded, may hang controller */
fc4d0a69	238	if (bp == &chtbuf[HTUNIT(bp->b_dev)] && bp->b_command == HT_SENSE) {
9f1dae18 BJ	239	htaddr->htcs1 = HT_SENSE\|HT_GO;
	240	mbclrattn(mi);
	241	}
244b8363	242	#endif
fcc37d29 BJ	243	sc->sc_dsreg = htaddr->htds;
	244	sc->sc_erreg = htaddr->hter;
	245	sc->sc_resid = htaddr->htfc;
	246	sc->sc_flags &= ~(H_WRITTEN\|H_REWIND);
	247	if ((htaddr->htdt & HTDT_SPR) == 0 \|\| (htaddr->htds & HTDS_MOL) == 0)
	248	if (sc->sc_openf > 0)
	249	sc->sc_openf = -1;
	250	if (sc->sc_openf < 0) {
	251	bp->b_flags \|= B_ERROR;
	252	return (MBU_NEXT);
	253	}
d565635a	254	if (bp != &chtbuf[HTUNIT(bp->b_dev)]) {
5d4eae4d KB	255	/* transfer: check positioning */
	256	if (bp->b_flags & B_RAW) {
	257	/* raw transfer: record position for retry */
	258	if (mi->mi_tab.b_errcnt == 0) {
	259	sc->sc_blkno = bdbtofsb(bp->b_blkno);
	260	sc->sc_nxrec = sc->sc_blkno + 1;
	261	}
	262	} else {
	263	if (bdbtofsb(bp->b_blkno) > sc->sc_nxrec) {
	264	bp->b_flags \|= B_ERROR;
	265	bp->b_error = ENXIO;
	266	return (MBU_NEXT);
	267	}
	268	if (bdbtofsb(bp->b_blkno) == sc->sc_nxrec &&
	269	bp->b_flags&B_READ) {
	270	bp->b_resid = bp->b_bcount;
	271	clrbuf(bp);
	272	return (MBU_NEXT);
	273	}
	274	if ((bp->b_flags&B_READ)==0)
	275	sc->sc_nxrec = bdbtofsb(bp->b_blkno) + 1;
d565635a	276	}
fcc37d29	277	} else {
0deaf016	278	if (bp->b_command == HT_SENSE)
fcc37d29 BJ	279	return (MBU_NEXT);
	280	if (bp->b_command == HT_REW)
	281	sc->sc_flags \|= H_REWIND;
	282	else
	283	htaddr->htfc = -bp->b_bcount;
	284	htaddr->htcs1 = bp->b_command\|HT_GO;
	285	return (MBU_STARTED);
	286	}
43d66181	287	if ((blkno = sc->sc_blkno) == bdbtofsb(bp->b_blkno)) {
fcc37d29 BJ	288	htaddr->htfc = -bp->b_bcount;
fcc37d29 BJ	289	if ((bp->b_flags&B_READ) == 0) {
d565635a BJ	290	if (mi->mi_tab.b_errcnt) {
d565635a BJ	291	if ((sc->sc_flags & H_ERASED) == 0) {
fcc37d29 BJ	292	sc->sc_flags \|= H_ERASED;
	293	htaddr->htcs1 = HT_ERASE \| HT_GO;
	294	return (MBU_STARTED);
	295	}
d565635a BJ	296	sc->sc_flags &= ~H_ERASED;
d565635a BJ	297	}
fcc37d29 BJ	298	if (htaddr->htds & HTDS_EOT) {
fcc37d29 BJ	299	bp->b_resid = bp->b_bcount;
b0130242	300	bp->b_flags \|= B_ERROR;
fcc37d29 BJ	301	return (MBU_NEXT);
fcc37d29 BJ	302	}
786dff00	303	}
fcc37d29	304	return (MBU_DODATA);
786dff00	305	}
43d66181 SL	306	if (blkno < bdbtofsb(bp->b_blkno)) {
43d66181 SL	307	htaddr->htfc = blkno - bdbtofsb(bp->b_blkno);
fcc37d29	308	htaddr->htcs1 = HT_SFORW\|HT_GO;
786dff00	309	} else {
43d66181	310	htaddr->htfc = bdbtofsb(bp->b_blkno) - blkno;
fcc37d29	311	htaddr->htcs1 = HT_SREV\|HT_GO;
786dff00	312	}
fcc37d29	313	return (MBU_STARTED);
786dff00 BJ	314	}
786dff00 BJ	315
d565635a	316	htdtint(mi, mbsr)
89bd2f01	317	register struct mba_device *mi;
d565635a	318	int mbsr;
786dff00	319	{
fcc37d29 BJ	320	register struct htdevice htaddr = (struct htdevice )mi->mi_drv;
fcc37d29 BJ	321	register struct buf *bp = mi->mi_tab.b_actf;
d565635a	322	register struct tu_softc *sc;
0deaf016	323	int ds, er, mbs;
786dff00	324
d565635a	325	sc = &tu_softc[TUUNIT(bp->b_dev)];
fcc37d29 BJ	326	ds = sc->sc_dsreg = MASKREG(htaddr->htds);
	327	er = sc->sc_erreg = MASKREG(htaddr->hter);
	328	sc->sc_resid = MASKREG(htaddr->htfc);
d565635a	329	mbs = mbsr;
fcc37d29 BJ	330	sc->sc_blkno++;
	331	if((bp->b_flags & B_READ) == 0)
	332	sc->sc_flags \|= H_WRITTEN;
d565635a	333	if ((ds&(HTDS_ERR\|HTDS_MOL)) != HTDS_MOL \|\| mbs & MBSR_EBITS) {
fcc37d29	334	htaddr->htcs1 = HT_DCLR\|HT_GO;
0deaf016	335	mbclrattn(mi);
5d4eae4d	336	if (bp->b_flags & B_RAW) {
fcc37d29	337	er &= ~HTER_FCE;
d565635a	338	mbs &= ~(MBSR_DTABT\|MBSR_MBEXC);
ea59de47	339	}
fcc37d29 BJ	340	if (bp->b_flags & B_READ && ds & HTDS_PES)
fcc37d29 BJ	341	er &= ~(HTER_CSITM\|HTER_CORCRC);
d565635a	342	if (er&HTER_HARD \|\| mbs&MBSR_EBITS \|\| (ds&HTDS_MOL) == 0 \|\|
0deaf016	343	er && ++mi->mi_tab.b_errcnt >= 7) {
fcc37d29 BJ	344	if ((ds & HTDS_MOL) == 0 && sc->sc_openf > 0)
fcc37d29 BJ	345	sc->sc_openf = -1;
9f1dae18 BJ	346	if ((er&HTER_HARD) == HTER_FCE &&
	347	(mbs&MBSR_EBITS) == (MBSR_DTABT\|MBSR_MBEXC) &&
	348	(ds&HTDS_MOL))
	349	goto noprint;
48165e7b	350	tprintf(sc->sc_ttyp, "tu%d: hard error bn%d mbsr=%b er=%b ds=%b\n",
89bd2f01	351	TUUNIT(bp->b_dev), bp->b_blkno,
d565635a	352	mbsr, mbsr_bits,
3ee331b1 BJ	353	sc->sc_erreg, hter_bits,
3ee331b1 BJ	354	sc->sc_dsreg, htds_bits);
9f1dae18	355	noprint:
786dff00	356	bp->b_flags \|= B_ERROR;
fcc37d29	357	return (MBD_DONE);
786dff00	358	}
fcc37d29 BJ	359	if (er)
fcc37d29 BJ	360	return (MBD_RETRY);
786dff00	361	}
fcc37d29	362	bp->b_resid = 0;
c457503f MK	363	sc->sc_blks++;
	364	if (mi->mi_tab.b_errcnt)
	365	sc->sc_softerrs++;
fcc37d29 BJ	366	if (bp->b_flags & B_READ)
	367	if (ds&HTDS_TM) { /* must be a read, right? */
	368	bp->b_resid = bp->b_bcount;
43d66181	369	sc->sc_nxrec = bdbtofsb(bp->b_blkno);
fcc37d29 BJ	370	} else if(bp->b_bcount > MASKREG(htaddr->htfc))
	371	bp->b_resid = bp->b_bcount - MASKREG(htaddr->htfc);
	372	return (MBD_DONE);
	373	}
786dff00	374
fcc37d29	375	htndtint(mi)
89bd2f01	376	register struct mba_device *mi;
fcc37d29 BJ	377	{
	378	register struct htdevice htaddr = (struct htdevice )mi->mi_drv;
	379	register struct buf *bp = mi->mi_tab.b_actf;
d565635a	380	register struct tu_softc *sc;
fcc37d29	381	int er, ds, fc;
786dff00	382
d565635a BJ	383	ds = MASKREG(htaddr->htds);
	384	er = MASKREG(htaddr->hter);
	385	fc = MASKREG(htaddr->htfc);
	386	if (er) {
fcc37d29	387	htaddr->htcs1 = HT_DCLR\|HT_GO;
0deaf016 BJ	388	mbclrattn(mi);
0deaf016 BJ	389	}
d565635a BJ	390	if (bp == 0)
	391	return (MBN_SKIP);
	392	sc = &tu_softc[TUUNIT(bp->b_dev)];
	393	sc->sc_dsreg = ds;
	394	sc->sc_erreg = er;
	395	sc->sc_resid = fc;
	396	if (bp == &chtbuf[HTUNIT(bp->b_dev)]) {
3c58f9df	397	switch ((int)bp->b_command) {
d565635a	398	case HT_REWOFFL:
fcc37d29 BJ	399	/* offline is on purpose; don't do anything special */
fcc37d29 BJ	400	ds \|= HTDS_MOL;
d565635a BJ	401	break;
	402	case HT_SREV:
	403	/* if backspace file hit bot, its not an error */
	404	if (er == (HTER_NEF\|HTER_FCE) && ds&HTDS_BOT &&
	405	bp->b_repcnt == INF)
	406	er &= ~HTER_NEF;
	407	break;
	408	}
fcc37d29 BJ	409	er &= ~HTER_FCE;
	410	if (er == 0)
	411	ds &= ~HTDS_ERR;
	412	}
	413	if ((ds & (HTDS_ERR\|HTDS_MOL)) != HTDS_MOL) {
	414	if ((ds & HTDS_MOL) == 0 && sc->sc_openf > 0)
	415	sc->sc_openf = -1;
48165e7b	416	tprintf(sc->sc_ttyp, "tu%d: hard error bn%d er=%b ds=%b\n",
89bd2f01	417	TUUNIT(bp->b_dev), bp->b_blkno,
3ee331b1	418	sc->sc_erreg, hter_bits, sc->sc_dsreg, htds_bits);
fcc37d29 BJ	419	bp->b_flags \|= B_ERROR;
fcc37d29 BJ	420	return (MBN_DONE);
786dff00	421	}
d565635a	422	if (bp == &chtbuf[HTUNIT(bp->b_dev)]) {
fcc37d29 BJ	423	if (sc->sc_flags & H_REWIND)
	424	return (ds & HTDS_BOT ? MBN_DONE : MBN_RETRY);
	425	bp->b_resid = -sc->sc_resid;
	426	return (MBN_DONE);
	427	}
	428	if (ds & HTDS_TM)
43d66181 SL	429	if (sc->sc_blkno > bdbtofsb(bp->b_blkno)) {
43d66181 SL	430	sc->sc_nxrec = bdbtofsb(bp->b_blkno) - fc;
fcc37d29	431	sc->sc_blkno = sc->sc_nxrec;
d565635a	432	} else {
43d66181	433	sc->sc_blkno = bdbtofsb(bp->b_blkno) + fc;
fcc37d29 BJ	434	sc->sc_nxrec = sc->sc_blkno - 1;
	435	}
	436	else
43d66181	437	sc->sc_blkno = bdbtofsb(bp->b_blkno);
fcc37d29	438	return (MBN_RETRY);
786dff00 BJ	439	}
786dff00 BJ	440
fcc37d29	441	/ARGSUSED/
942f05a9	442	htioctl(dev, cmd, data, flag)
fcc37d29 BJ	443	dev_t dev;
fcc37d29 BJ	444	int cmd;
942f05a9	445	caddr_t data;
fcc37d29 BJ	446	int flag;
fcc37d29 BJ	447	{
d565635a BJ	448	register struct tu_softc *sc = &tu_softc[TUUNIT(dev)];
d565635a BJ	449	register struct buf *bp = &chtbuf[HTUNIT(dev)];
fcc37d29 BJ	450	register callcount;
fcc37d29 BJ	451	int fcount;
942f05a9 SL	452	struct mtop *mtop;
942f05a9 SL	453	struct mtget *mtget;
fcc37d29 BJ	454	/* we depend of the values and order of the MT codes here */
	455	static htops[] =
	456	{HT_WEOF,HT_SFORW,HT_SREV,HT_SFORW,HT_SREV,HT_REW,HT_REWOFFL,HT_SENSE};
	457
	458	switch (cmd) {
942f05a9 SL	459
	460	case MTIOCTOP: /* tape operation */
	461	mtop = (struct mtop *)data;
	462	switch (mtop->mt_op) {
	463
fcc37d29	464	case MTWEOF:
942f05a9	465	callcount = mtop->mt_count;
fcc37d29 BJ	466	fcount = 1;
fcc37d29 BJ	467	break;
942f05a9	468
fcc37d29	469	case MTFSF: case MTBSF:
942f05a9	470	callcount = mtop->mt_count;
fcc37d29 BJ	471	fcount = INF;
fcc37d29 BJ	472	break;
942f05a9	473
fcc37d29 BJ	474	case MTFSR: case MTBSR:
fcc37d29 BJ	475	callcount = 1;
942f05a9	476	fcount = mtop->mt_count;
fcc37d29	477	break;
942f05a9	478
fcc37d29 BJ	479	case MTREW: case MTOFFL:
	480	callcount = 1;
	481	fcount = 1;
	482	break;
942f05a9	483
fcc37d29	484	default:
473a2e47	485	return (ENXIO);
fcc37d29	486	}
473a2e47 BJ	487	if (callcount <= 0 \|\| fcount <= 0)
473a2e47 BJ	488	return (EINVAL);
fcc37d29	489	while (--callcount >= 0) {
942f05a9 SL	490	htcommand(dev, htops[mtop->mt_op], fcount);
942f05a9 SL	491	if ((mtop->mt_op == MTFSR \|\| mtop->mt_op == MTBSR) &&
473a2e47 BJ	492	bp->b_resid)
473a2e47 BJ	493	return (EIO);
d565635a	494	if ((bp->b_flags&B_ERROR) \|\| sc->sc_dsreg&HTDS_BOT)
fcc37d29 BJ	495	break;
fcc37d29 BJ	496	}
5a1f132a	497	return (geterror(bp));
942f05a9	498
fcc37d29	499	case MTIOCGET:
942f05a9 SL	500	mtget = (struct mtget *)data;
	501	mtget->mt_dsreg = sc->sc_dsreg;
	502	mtget->mt_erreg = sc->sc_erreg;
	503	mtget->mt_resid = sc->sc_resid;
	504	mtget->mt_type = MT_ISHT;
473a2e47	505	break;
942f05a9	506
fcc37d29	507	default:
473a2e47	508	return (ENXIO);
fcc37d29	509	}
473a2e47	510	return (0);
fcc37d29	511	}
f0a3ddbd BJ	512
	513	#define DBSIZE 20
	514
fcc37d29	515	htdump()
f0a3ddbd	516	{
89bd2f01	517	register struct mba_device *mi;
fcc37d29 BJ	518	register struct mba_regs *mp;
	519	register struct htdevice *htaddr;
	520	int blk, num;
	521	int start;
	522
	523	start = 0;
	524	num = maxfree;
	525	#define phys(a,b) ((b)((int)(a)&0x7fffffff))
	526	if (htinfo[0] == 0)
	527	return (ENXIO);
89bd2f01	528	mi = phys(htinfo[0], struct mba_device *);
fcc37d29	529	mp = phys(mi->mi_hd, struct mba_hd *)->mh_physmba;
9f1dae18	530	mp->mba_cr = MBCR_IE;
fcc37d29 BJ	531	htaddr = (struct htdevice *)&mp->mba_drv[mi->mi_drive];
	532	htaddr->httc = HTTC_PDP11\|HTTC_1600BPI;
	533	htaddr->htcs1 = HT_DCLR\|HT_GO;
f0a3ddbd BJ	534	while (num > 0) {
f0a3ddbd BJ	535	blk = num > DBSIZE ? DBSIZE : num;
fcc37d29 BJ	536	htdwrite(start, blk, htaddr, mp);
fcc37d29 BJ	537	start += blk;
f0a3ddbd BJ	538	num -= blk;
f0a3ddbd BJ	539	}
fcc37d29 BJ	540	hteof(htaddr);
fcc37d29 BJ	541	hteof(htaddr);
9f1dae18	542	htwait(htaddr);
fc4d0a69	543	if (htaddr->htds&HTDS_ERR)
9f1dae18 BJ	544	return (EIO);
9f1dae18 BJ	545	htaddr->htcs1 = HT_REW\|HT_GO;
a0eab615	546	return (0);
f0a3ddbd BJ	547	}
f0a3ddbd BJ	548
fcc37d29 BJ	549	htdwrite(dbuf, num, htaddr, mp)
	550	register dbuf, num;
	551	register struct htdevice *htaddr;
	552	struct mba_regs *mp;
f0a3ddbd	553	{
fcc37d29	554	register struct pte *io;
f0a3ddbd BJ	555	register int i;
f0a3ddbd BJ	556
fcc37d29 BJ	557	htwait(htaddr);
fcc37d29 BJ	558	io = mp->mba_map;
f0a3ddbd	559	for (i = 0; i < num; i++)
fcc37d29 BJ	560	(int )io++ = dbuf++ \| PG_V;
	561	htaddr->htfc = -(num*NBPG);
	562	mp->mba_sr = -1;
	563	mp->mba_bcr = -(num*NBPG);
	564	mp->mba_var = 0;
	565	htaddr->htcs1 = HT_WCOM\|HT_GO;
f0a3ddbd BJ	566	}
f0a3ddbd BJ	567
fcc37d29 BJ	568	htwait(htaddr)
fcc37d29 BJ	569	struct htdevice *htaddr;
f0a3ddbd BJ	570	{
	571	register s;
	572
	573	do
fcc37d29 BJ	574	s = htaddr->htds;
fcc37d29 BJ	575	while ((s & HTDS_DRY) == 0);
f0a3ddbd BJ	576	}
f0a3ddbd BJ	577
fcc37d29 BJ	578	hteof(htaddr)
fcc37d29 BJ	579	struct htdevice *htaddr;
f0a3ddbd BJ	580	{
f0a3ddbd BJ	581
fcc37d29 BJ	582	htwait(htaddr);
fcc37d29 BJ	583	htaddr->htcs1 = HT_WEOF\|HT_GO;
f0a3ddbd	584	}
a5cc519e	585	#endif