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

/*
 * Copyright (c) 1982 Regents of the University of California.
 * All rights reserved.  The Berkeley software License Agreement
 * specifies the terms and conditions for redistribution.
 *
 *	@(#)ht.c	6.7 (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 "../machine/pte.h"

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

struct	buf	rhtbuf[NHT];
struct	buf	chtbuf[NHT];

short	httypes[] =
	{ MBDT_TM03, MBDT_TE16, MBDT_TU45, MBDT_TU77, 0 };
struct	mba_device *htinfo[NHT];
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_1600BPI	08

#define HTUNIT(dev)	(tutoht[TUUNIT(dev)])

#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	mba_device *sc_mi;
	int	sc_slave;
	struct	tty *sc_ttyp;		/* record user's tty for errors */
} tu_softc[NTU];
short	tutoht[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 tu_softc *sc = &tu_softc[ms->ms_unit];
	register struct htdevice *htaddr = (struct htdevice *)mi->mi_drv;

	htaddr->httc = sn;
	if (htaddr->htdt & HTDT_SPR) {
		sc->sc_mi = mi;
		sc->sc_slave = sn;
		tutoht[ms->ms_unit] = mi->mi_unit;
		return (1);
	} else
		return (0);
}

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

	tuunit = TUUNIT(dev);
	if (tuunit >= NTU || (mi = htinfo[HTUNIT(dev)]) == 0 ||
	    mi->mi_alive == 0)
		return (ENXIO);
	if ((sc = &tu_softc[tuunit])->sc_openf)
		return (EBUSY);
	olddens = sc->sc_dens;
	dens = sc->sc_dens =
	    ((minor(dev)&H_1600BPI)?HTTC_1600BPI:HTTC_800BPI)|
		HTTC_PDP11|sc->sc_slave;
	htcommand(dev, HT_SENSE, 1);
	sc->sc_dens = olddens;
	if ((sc->sc_dsreg & HTDS_MOL) == 0) {
		uprintf("tu%d: not online\n", tuunit);
		return (EIO);
	}
	if ((flag&FWRITE) && (sc->sc_dsreg&HTDS_WRL)) {
		uprintf("tu%d: no write ring\n", tuunit);
		return (EIO);
	}
	if ((sc->sc_dsreg & HTDS_BOT) == 0 && (flag&FWRITE) &&
	    dens != sc->sc_dens) {
		uprintf("tu%d: can't change density in mid-tape\n", tuunit);
		return (EIO);
	}
	sc->sc_openf = 1;
	sc->sc_blkno = (daddr_t)0;
	sc->sc_nxrec = INF;
	sc->sc_flags = 0;
	sc->sc_dens = dens;
	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);
	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)]) {
		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 == &rhtbuf[HTUNIT(bp->b_dev)]) {
			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;
	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);
}

htread(dev, uio)
	dev_t dev;
	struct uio *uio;
{
	int errno;

	errno = htphys(dev, uio);
	if (errno)
		return (errno);
	return (physio(htstrategy, &rhtbuf[HTUNIT(dev)], dev, B_READ, minphys, uio));
}

htwrite(dev, uio)
	dev_t dev;
	struct uio *uio;
{
	int errno;

	errno = htphys(dev, uio);
	if (errno)
		return (errno);
	return (physio(htstrategy, &rhtbuf[HTUNIT(dev)], dev, B_WRITE, minphys, uio));
}

htphys(dev, uio)
	dev_t dev;
	struct uio *uio;
{
	register int htunit;
	register struct tu_softc *sc;
	register struct mba_device *mi;
	daddr_t a;

	htunit = HTUNIT(dev);
	if (htunit >= NHT || (mi = htinfo[htunit]) == 0 || mi->mi_alive == 0)
		return (ENXIO);
	a = uio->uio_offset >> 9;
	sc = &tu_softc[TUUNIT(dev)];
	sc->sc_blkno = bdbtofsb(a);
	sc->sc_nxrec = bdbtofsb(a)+1;
	return (0);
}

/*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 KM	1	/*
	2	* Copyright (c) 1982 Regents of the University of California.
	3	* All rights reserved. The Berkeley software License Agreement
	4	* specifies the terms and conditions for redistribution.
	5	*
f2e181c6	6	* @(#)ht.c 6.7 (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	*/
961945a8 SL	20	#include "../machine/pte.h"
961945a8 SL	21
969e52ef JB	22	#include "param.h"
	23	#include "systm.h"
	24	#include "buf.h"
	25	#include "conf.h"
	26	#include "dir.h"
	27	#include "file.h"
	28	#include "user.h"
	29	#include "map.h"
	30	#include "ioctl.h"
	31	#include "mtio.h"
	32	#include "cmap.h"
	33	#include "uio.h"
48165e7b	34	#include "tty.h"
786dff00	35
c895c266	36	#include "../vax/cpu.h"
969e52ef JB	37	#include "mbareg.h"
	38	#include "mbavar.h"
	39	#include "htreg.h"
fcc37d29 BJ	40
	41	struct buf rhtbuf[NHT];
	42	struct buf chtbuf[NHT];
	43
	44	short httypes[] =
fc4d0a69	45	{ MBDT_TM03, MBDT_TE16, MBDT_TU45, MBDT_TU77, 0 };
89bd2f01	46	struct mba_device *htinfo[NHT];
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 BJ	56	#define H_NOREWIND 04
fcc37d29 BJ	57	#define H_1600BPI 08
786dff00	58
d565635a	59	#define HTUNIT(dev) (tutoht[TUUNIT(dev)])
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;
89bd2f01 BJ	72	struct mba_device *sc_mi;
89bd2f01 BJ	73	int sc_slave;
48165e7b	74	struct tty sc_ttyp; / record user's tty for errors */
d565635a BJ	75	} tu_softc[NTU];
d565635a BJ	76	short tutoht[NTU];
fcc37d29	77
fcc37d29 BJ	78	/*
	79	* Bits for sc_flags.
	80	*/
	81	#define H_WRITTEN 1 /* last operation was a write */
	82	#define H_ERASED 2 /* last write retry was an erase gap */
	83	#define H_REWIND 4 /* last unit start was a rewind */
786dff00	84
3ee331b1 BJ	85	char hter_bits[] = HTER_BITS;
	86	char htds_bits[] = HTDS_BITS;
	87
fcc37d29	88	/ARGSUSED/
89bd2f01 BJ	89	htattach(mi)
	90	struct mba_device *mi;
	91	{
	92
	93	}
	94
51250c66	95	htslave(mi, ms, sn)
89bd2f01 BJ	96	struct mba_device *mi;
89bd2f01 BJ	97	struct mba_slave *ms;
51250c66	98	int sn;
fcc37d29	99	{
d565635a	100	register struct tu_softc *sc = &tu_softc[ms->ms_unit];
64614526 BJ	101	register struct htdevice htaddr = (struct htdevice )mi->mi_drv;
64614526 BJ	102
51250c66	103	htaddr->httc = sn;
64614526 BJ	104	if (htaddr->htdt & HTDT_SPR) {
64614526 BJ	105	sc->sc_mi = mi;
51250c66	106	sc->sc_slave = sn;
64614526 BJ	107	tutoht[ms->ms_unit] = mi->mi_unit;
	108	return (1);
	109	} else
	110	return (0);
fcc37d29	111	}
786dff00 BJ	112
786dff00 BJ	113	htopen(dev, flag)
fcc37d29 BJ	114	dev_t dev;
fcc37d29 BJ	115	int flag;
786dff00	116	{
d565635a	117	register int tuunit;
89bd2f01	118	register struct mba_device *mi;
d565635a	119	register struct tu_softc *sc;
cd470e1d	120	int olddens, dens;
786dff00	121
d565635a	122	tuunit = TUUNIT(dev);
1e6047bb MK	123	if (tuunit >= NTU \|\| (mi = htinfo[HTUNIT(dev)]) == 0 \|\|
1e6047bb MK	124	mi->mi_alive == 0)
473a2e47	125	return (ENXIO);
1e6047bb MK	126	if ((sc = &tu_softc[tuunit])->sc_openf)
1e6047bb MK	127	return (EBUSY);
cd470e1d	128	olddens = sc->sc_dens;
3ee331b1	129	dens = sc->sc_dens =
d565635a BJ	130	((minor(dev)&H_1600BPI)?HTTC_1600BPI:HTTC_800BPI)\|
d565635a BJ	131	HTTC_PDP11\|sc->sc_slave;
cd470e1d BJ	132	htcommand(dev, HT_SENSE, 1);
cd470e1d BJ	133	sc->sc_dens = olddens;
61add2a3	134	if ((sc->sc_dsreg & HTDS_MOL) == 0) {
1d78646d	135	uprintf("tu%d: not online\n", tuunit);
473a2e47	136	return (EIO);
61add2a3 BJ	137	}
61add2a3 BJ	138	if ((flag&FWRITE) && (sc->sc_dsreg&HTDS_WRL)) {
1d78646d	139	uprintf("tu%d: no write ring\n", tuunit);
473a2e47	140	return (EIO);
61add2a3 BJ	141	}
	142	if ((sc->sc_dsreg & HTDS_BOT) == 0 && (flag&FWRITE) &&
	143	dens != sc->sc_dens) {
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_openf = 1;
	148	sc->sc_blkno = (daddr_t)0;
	149	sc->sc_nxrec = INF;
	150	sc->sc_flags = 0;
d565635a	151	sc->sc_dens = dens;
48165e7b	152	sc->sc_ttyp = u.u_ttyp;
473a2e47	153	return (0);
786dff00 BJ	154	}
	155
	156	htclose(dev, flag)
fcc37d29 BJ	157	register dev_t dev;
fcc37d29 BJ	158	register flag;
786dff00	159	{
d565635a	160	register struct tu_softc *sc = &tu_softc[TUUNIT(dev)];
786dff00	161
fcc37d29 BJ	162	if (flag == FWRITE \|\| ((flag&FWRITE) && (sc->sc_flags&H_WRITTEN))) {
	163	htcommand(dev, HT_WEOF, 1);
	164	htcommand(dev, HT_WEOF, 1);
	165	htcommand(dev, HT_SREV, 1);
786dff00	166	}
fcc37d29	167	if ((minor(dev)&H_NOREWIND) == 0)
fcc37d29 BJ	168	htcommand(dev, HT_REW, 0);
fcc37d29 BJ	169	sc->sc_openf = 0;
786dff00 BJ	170	}
786dff00 BJ	171
fcc37d29 BJ	172	htcommand(dev, com, count)
	173	dev_t dev;
	174	int com, count;
786dff00 BJ	175	{
786dff00 BJ	176	register struct buf *bp;
2311123d	177	register int s;
786dff00	178
fcc37d29	179	bp = &chtbuf[HTUNIT(dev)];
2311123d	180	s = spl5();
fcc37d29	181	while (bp->b_flags&B_BUSY) {
9f1dae18	182	if(bp->b_repcnt == 0 && (bp->b_flags&B_DONE))
89bd2f01	183	break;
786dff00 BJ	184	bp->b_flags \|= B_WANTED;
	185	sleep((caddr_t)bp, PRIBIO);
	186	}
dc637456	187	bp->b_flags = B_BUSY\|B_READ;
2311123d	188	splx(s);
786dff00	189	bp->b_dev = dev;
fcc37d29 BJ	190	bp->b_command = com;
fcc37d29 BJ	191	bp->b_repcnt = count;
786dff00	192	bp->b_blkno = 0;
786dff00	193	htstrategy(bp);
fcc37d29 BJ	194	if (count == 0)
fcc37d29 BJ	195	return;
786dff00	196	iowait(bp);
fcc37d29	197	if (bp->b_flags&B_WANTED)
786dff00	198	wakeup((caddr_t)bp);
fcc37d29	199	bp->b_flags &= B_ERROR;
786dff00 BJ	200	}
	201
	202	htstrategy(bp)
fcc37d29	203	register struct buf *bp;
786dff00	204	{
d565635a	205	register struct mba_device *mi = htinfo[HTUNIT(bp->b_dev)];
fcc37d29	206	register struct buf *dp;
2311123d	207	register int s;
786dff00	208
786dff00	209	bp->av_forw = NULL;
fcc37d29	210	dp = &mi->mi_tab;
2311123d	211	s = spl5();
fcc37d29 BJ	212	if (dp->b_actf == NULL)
fcc37d29 BJ	213	dp->b_actf = bp;
786dff00	214	else
fcc37d29 BJ	215	dp->b_actl->av_forw = bp;
	216	dp->b_actl = bp;
	217	if (dp->b_active == 0)
	218	mbustart(mi);
2311123d	219	splx(s);
786dff00 BJ	220	}
786dff00 BJ	221
fcc37d29	222	htustart(mi)
89bd2f01	223	register struct mba_device *mi;
786dff00	224	{
fcc37d29 BJ	225	register struct htdevice *htaddr =
	226	(struct htdevice *)mi->mi_drv;
	227	register struct buf *bp = mi->mi_tab.b_actf;
d565635a	228	register struct tu_softc *sc = &tu_softc[TUUNIT(bp->b_dev)];
786dff00 BJ	229	daddr_t blkno;
786dff00 BJ	230
fcc37d29	231	htaddr->httc = sc->sc_dens;
244b8363 MK	232	#ifdef notdef
244b8363 MK	233	/* unneeded, may hang controller */
fc4d0a69	234	if (bp == &chtbuf[HTUNIT(bp->b_dev)] && bp->b_command == HT_SENSE) {
9f1dae18 BJ	235	htaddr->htcs1 = HT_SENSE\|HT_GO;
	236	mbclrattn(mi);
	237	}
244b8363	238	#endif
fcc37d29 BJ	239	sc->sc_dsreg = htaddr->htds;
	240	sc->sc_erreg = htaddr->hter;
	241	sc->sc_resid = htaddr->htfc;
	242	sc->sc_flags &= ~(H_WRITTEN\|H_REWIND);
	243	if ((htaddr->htdt & HTDT_SPR) == 0 \|\| (htaddr->htds & HTDS_MOL) == 0)
	244	if (sc->sc_openf > 0)
	245	sc->sc_openf = -1;
	246	if (sc->sc_openf < 0) {
	247	bp->b_flags \|= B_ERROR;
	248	return (MBU_NEXT);
	249	}
d565635a	250	if (bp != &chtbuf[HTUNIT(bp->b_dev)]) {
43d66181	251	if (bdbtofsb(bp->b_blkno) > sc->sc_nxrec) {
fcc37d29 BJ	252	bp->b_flags \|= B_ERROR;
fcc37d29 BJ	253	bp->b_error = ENXIO;
0deaf016	254	return (MBU_NEXT);
d565635a	255	}
43d66181	256	if (bdbtofsb(bp->b_blkno) == sc->sc_nxrec &&
fcc37d29 BJ	257	bp->b_flags&B_READ) {
	258	bp->b_resid = bp->b_bcount;
	259	clrbuf(bp);
0deaf016	260	return (MBU_NEXT);
d565635a BJ	261	}
d565635a BJ	262	if ((bp->b_flags&B_READ)==0)
43d66181	263	sc->sc_nxrec = bdbtofsb(bp->b_blkno) + 1;
fcc37d29	264	} else {
0deaf016	265	if (bp->b_command == HT_SENSE)
fcc37d29 BJ	266	return (MBU_NEXT);
	267	if (bp->b_command == HT_REW)
	268	sc->sc_flags \|= H_REWIND;
	269	else
	270	htaddr->htfc = -bp->b_bcount;
	271	htaddr->htcs1 = bp->b_command\|HT_GO;
	272	return (MBU_STARTED);
	273	}
43d66181	274	if ((blkno = sc->sc_blkno) == bdbtofsb(bp->b_blkno)) {
fcc37d29 BJ	275	htaddr->htfc = -bp->b_bcount;
fcc37d29 BJ	276	if ((bp->b_flags&B_READ) == 0) {
d565635a BJ	277	if (mi->mi_tab.b_errcnt) {
d565635a BJ	278	if ((sc->sc_flags & H_ERASED) == 0) {
fcc37d29 BJ	279	sc->sc_flags \|= H_ERASED;
	280	htaddr->htcs1 = HT_ERASE \| HT_GO;
	281	return (MBU_STARTED);
	282	}
d565635a BJ	283	sc->sc_flags &= ~H_ERASED;
d565635a BJ	284	}
fcc37d29 BJ	285	if (htaddr->htds & HTDS_EOT) {
fcc37d29 BJ	286	bp->b_resid = bp->b_bcount;
b0130242	287	bp->b_flags \|= B_ERROR;
fcc37d29 BJ	288	return (MBU_NEXT);
fcc37d29 BJ	289	}
786dff00	290	}
fcc37d29	291	return (MBU_DODATA);
786dff00	292	}
43d66181 SL	293	if (blkno < bdbtofsb(bp->b_blkno)) {
43d66181 SL	294	htaddr->htfc = blkno - bdbtofsb(bp->b_blkno);
fcc37d29	295	htaddr->htcs1 = HT_SFORW\|HT_GO;
786dff00	296	} else {
43d66181	297	htaddr->htfc = bdbtofsb(bp->b_blkno) - blkno;
fcc37d29	298	htaddr->htcs1 = HT_SREV\|HT_GO;
786dff00	299	}
fcc37d29	300	return (MBU_STARTED);
786dff00 BJ	301	}
786dff00 BJ	302
d565635a	303	htdtint(mi, mbsr)
89bd2f01	304	register struct mba_device *mi;
d565635a	305	int mbsr;
786dff00	306	{
fcc37d29 BJ	307	register struct htdevice htaddr = (struct htdevice )mi->mi_drv;
fcc37d29 BJ	308	register struct buf *bp = mi->mi_tab.b_actf;
d565635a	309	register struct tu_softc *sc;
0deaf016	310	int ds, er, mbs;
786dff00	311
d565635a	312	sc = &tu_softc[TUUNIT(bp->b_dev)];
fcc37d29 BJ	313	ds = sc->sc_dsreg = MASKREG(htaddr->htds);
	314	er = sc->sc_erreg = MASKREG(htaddr->hter);
	315	sc->sc_resid = MASKREG(htaddr->htfc);
d565635a	316	mbs = mbsr;
fcc37d29 BJ	317	sc->sc_blkno++;
	318	if((bp->b_flags & B_READ) == 0)
	319	sc->sc_flags \|= H_WRITTEN;
d565635a	320	if ((ds&(HTDS_ERR\|HTDS_MOL)) != HTDS_MOL \|\| mbs & MBSR_EBITS) {
fcc37d29	321	htaddr->htcs1 = HT_DCLR\|HT_GO;
0deaf016 BJ	322	mbclrattn(mi);
0deaf016 BJ	323	if (bp == &rhtbuf[HTUNIT(bp->b_dev)]) {
fcc37d29	324	er &= ~HTER_FCE;
d565635a	325	mbs &= ~(MBSR_DTABT\|MBSR_MBEXC);
ea59de47	326	}
fcc37d29 BJ	327	if (bp->b_flags & B_READ && ds & HTDS_PES)
fcc37d29 BJ	328	er &= ~(HTER_CSITM\|HTER_CORCRC);
d565635a	329	if (er&HTER_HARD \|\| mbs&MBSR_EBITS \|\| (ds&HTDS_MOL) == 0 \|\|
0deaf016	330	er && ++mi->mi_tab.b_errcnt >= 7) {
fcc37d29 BJ	331	if ((ds & HTDS_MOL) == 0 && sc->sc_openf > 0)
fcc37d29 BJ	332	sc->sc_openf = -1;
9f1dae18 BJ	333	if ((er&HTER_HARD) == HTER_FCE &&
	334	(mbs&MBSR_EBITS) == (MBSR_DTABT\|MBSR_MBEXC) &&
	335	(ds&HTDS_MOL))
	336	goto noprint;
48165e7b	337	tprintf(sc->sc_ttyp, "tu%d: hard error bn%d mbsr=%b er=%b ds=%b\n",
89bd2f01	338	TUUNIT(bp->b_dev), bp->b_blkno,
d565635a	339	mbsr, mbsr_bits,
3ee331b1 BJ	340	sc->sc_erreg, hter_bits,
3ee331b1 BJ	341	sc->sc_dsreg, htds_bits);
9f1dae18	342	noprint:
786dff00	343	bp->b_flags \|= B_ERROR;
fcc37d29	344	return (MBD_DONE);
786dff00	345	}
fcc37d29 BJ	346	if (er)
fcc37d29 BJ	347	return (MBD_RETRY);
786dff00	348	}
fcc37d29 BJ	349	bp->b_resid = 0;
	350	if (bp->b_flags & B_READ)
	351	if (ds&HTDS_TM) { /* must be a read, right? */
	352	bp->b_resid = bp->b_bcount;
43d66181	353	sc->sc_nxrec = bdbtofsb(bp->b_blkno);
fcc37d29 BJ	354	} else if(bp->b_bcount > MASKREG(htaddr->htfc))
	355	bp->b_resid = bp->b_bcount - MASKREG(htaddr->htfc);
	356	return (MBD_DONE);
	357	}
786dff00	358
fcc37d29	359	htndtint(mi)
89bd2f01	360	register struct mba_device *mi;
fcc37d29 BJ	361	{
	362	register struct htdevice htaddr = (struct htdevice )mi->mi_drv;
	363	register struct buf *bp = mi->mi_tab.b_actf;
d565635a	364	register struct tu_softc *sc;
fcc37d29	365	int er, ds, fc;
786dff00	366
d565635a BJ	367	ds = MASKREG(htaddr->htds);
	368	er = MASKREG(htaddr->hter);
	369	fc = MASKREG(htaddr->htfc);
	370	if (er) {
fcc37d29	371	htaddr->htcs1 = HT_DCLR\|HT_GO;
0deaf016 BJ	372	mbclrattn(mi);
0deaf016 BJ	373	}
d565635a BJ	374	if (bp == 0)
	375	return (MBN_SKIP);
	376	sc = &tu_softc[TUUNIT(bp->b_dev)];
	377	sc->sc_dsreg = ds;
	378	sc->sc_erreg = er;
	379	sc->sc_resid = fc;
	380	if (bp == &chtbuf[HTUNIT(bp->b_dev)]) {
3c58f9df	381	switch ((int)bp->b_command) {
d565635a	382	case HT_REWOFFL:
fcc37d29 BJ	383	/* offline is on purpose; don't do anything special */
fcc37d29 BJ	384	ds \|= HTDS_MOL;
d565635a BJ	385	break;
	386	case HT_SREV:
	387	/* if backspace file hit bot, its not an error */
	388	if (er == (HTER_NEF\|HTER_FCE) && ds&HTDS_BOT &&
	389	bp->b_repcnt == INF)
	390	er &= ~HTER_NEF;
	391	break;
	392	}
fcc37d29 BJ	393	er &= ~HTER_FCE;
	394	if (er == 0)
	395	ds &= ~HTDS_ERR;
	396	}
	397	if ((ds & (HTDS_ERR\|HTDS_MOL)) != HTDS_MOL) {
	398	if ((ds & HTDS_MOL) == 0 && sc->sc_openf > 0)
	399	sc->sc_openf = -1;
48165e7b	400	tprintf(sc->sc_ttyp, "tu%d: hard error bn%d er=%b ds=%b\n",
89bd2f01	401	TUUNIT(bp->b_dev), bp->b_blkno,
3ee331b1	402	sc->sc_erreg, hter_bits, sc->sc_dsreg, htds_bits);
fcc37d29 BJ	403	bp->b_flags \|= B_ERROR;
fcc37d29 BJ	404	return (MBN_DONE);
786dff00	405	}
d565635a	406	if (bp == &chtbuf[HTUNIT(bp->b_dev)]) {
fcc37d29 BJ	407	if (sc->sc_flags & H_REWIND)
	408	return (ds & HTDS_BOT ? MBN_DONE : MBN_RETRY);
	409	bp->b_resid = -sc->sc_resid;
	410	return (MBN_DONE);
	411	}
	412	if (ds & HTDS_TM)
43d66181 SL	413	if (sc->sc_blkno > bdbtofsb(bp->b_blkno)) {
43d66181 SL	414	sc->sc_nxrec = bdbtofsb(bp->b_blkno) - fc;
fcc37d29	415	sc->sc_blkno = sc->sc_nxrec;
d565635a	416	} else {
43d66181	417	sc->sc_blkno = bdbtofsb(bp->b_blkno) + fc;
fcc37d29 BJ	418	sc->sc_nxrec = sc->sc_blkno - 1;
	419	}
	420	else
43d66181	421	sc->sc_blkno = bdbtofsb(bp->b_blkno);
fcc37d29	422	return (MBN_RETRY);
786dff00 BJ	423	}
786dff00 BJ	424
deb8980a	425	htread(dev, uio)
fcc37d29	426	dev_t dev;
deb8980a	427	struct uio *uio;
786dff00	428	{
23458a62	429	int errno;
fcc37d29	430
23458a62 BJ	431	errno = htphys(dev, uio);
	432	if (errno)
	433	return (errno);
	434	return (physio(htstrategy, &rhtbuf[HTUNIT(dev)], dev, B_READ, minphys, uio));
786dff00 BJ	435	}
786dff00 BJ	436
2e9f5990 BJ	437	htwrite(dev, uio)
2e9f5990 BJ	438	dev_t dev;
6e7edb25	439	struct uio *uio;
786dff00	440	{
23458a62	441	int errno;
fcc37d29	442
23458a62 BJ	443	errno = htphys(dev, uio);
	444	if (errno)
	445	return (errno);
	446	return (physio(htstrategy, &rhtbuf[HTUNIT(dev)], dev, B_WRITE, minphys, uio));
786dff00 BJ	447	}
786dff00 BJ	448
deb8980a	449	htphys(dev, uio)
fcc37d29	450	dev_t dev;
deb8980a	451	struct uio *uio;
786dff00	452	{
d565635a BJ	453	register int htunit;
	454	register struct tu_softc *sc;
	455	register struct mba_device *mi;
786dff00 BJ	456	daddr_t a;
786dff00 BJ	457
d565635a	458	htunit = HTUNIT(dev);
406ddcbe	459	if (htunit >= NHT \|\| (mi = htinfo[htunit]) == 0 \|\| mi->mi_alive == 0)
deb8980a	460	return (ENXIO);
406ddcbe	461	a = uio->uio_offset >> 9;
d565635a	462	sc = &tu_softc[TUUNIT(dev)];
43d66181 SL	463	sc->sc_blkno = bdbtofsb(a);
43d66181 SL	464	sc->sc_nxrec = bdbtofsb(a)+1;
deb8980a	465	return (0);
786dff00	466	}
f0a3ddbd	467
fcc37d29	468	/ARGSUSED/
942f05a9	469	htioctl(dev, cmd, data, flag)
fcc37d29 BJ	470	dev_t dev;
fcc37d29 BJ	471	int cmd;
942f05a9	472	caddr_t data;
fcc37d29 BJ	473	int flag;
fcc37d29 BJ	474	{
d565635a BJ	475	register struct tu_softc *sc = &tu_softc[TUUNIT(dev)];
d565635a BJ	476	register struct buf *bp = &chtbuf[HTUNIT(dev)];
fcc37d29 BJ	477	register callcount;
fcc37d29 BJ	478	int fcount;
942f05a9 SL	479	struct mtop *mtop;
942f05a9 SL	480	struct mtget *mtget;
fcc37d29 BJ	481	/* we depend of the values and order of the MT codes here */
	482	static htops[] =
	483	{HT_WEOF,HT_SFORW,HT_SREV,HT_SFORW,HT_SREV,HT_REW,HT_REWOFFL,HT_SENSE};
	484
	485	switch (cmd) {
942f05a9 SL	486
	487	case MTIOCTOP: /* tape operation */
	488	mtop = (struct mtop *)data;
	489	switch (mtop->mt_op) {
	490
fcc37d29	491	case MTWEOF:
942f05a9	492	callcount = mtop->mt_count;
fcc37d29 BJ	493	fcount = 1;
fcc37d29 BJ	494	break;
942f05a9	495
fcc37d29	496	case MTFSF: case MTBSF:
942f05a9	497	callcount = mtop->mt_count;
fcc37d29 BJ	498	fcount = INF;
fcc37d29 BJ	499	break;
942f05a9	500
fcc37d29 BJ	501	case MTFSR: case MTBSR:
fcc37d29 BJ	502	callcount = 1;
942f05a9	503	fcount = mtop->mt_count;
fcc37d29	504	break;
942f05a9	505
fcc37d29 BJ	506	case MTREW: case MTOFFL:
	507	callcount = 1;
	508	fcount = 1;
	509	break;
942f05a9	510
fcc37d29	511	default:
473a2e47	512	return (ENXIO);
fcc37d29	513	}
473a2e47 BJ	514	if (callcount <= 0 \|\| fcount <= 0)
473a2e47 BJ	515	return (EINVAL);
fcc37d29	516	while (--callcount >= 0) {
942f05a9 SL	517	htcommand(dev, htops[mtop->mt_op], fcount);
942f05a9 SL	518	if ((mtop->mt_op == MTFSR \|\| mtop->mt_op == MTBSR) &&
473a2e47 BJ	519	bp->b_resid)
473a2e47 BJ	520	return (EIO);
d565635a	521	if ((bp->b_flags&B_ERROR) \|\| sc->sc_dsreg&HTDS_BOT)
fcc37d29 BJ	522	break;
fcc37d29 BJ	523	}
5a1f132a	524	return (geterror(bp));
942f05a9	525
fcc37d29	526	case MTIOCGET:
942f05a9 SL	527	mtget = (struct mtget *)data;
	528	mtget->mt_dsreg = sc->sc_dsreg;
	529	mtget->mt_erreg = sc->sc_erreg;
	530	mtget->mt_resid = sc->sc_resid;
	531	mtget->mt_type = MT_ISHT;
473a2e47	532	break;
942f05a9	533
fcc37d29	534	default:
473a2e47	535	return (ENXIO);
fcc37d29	536	}
473a2e47	537	return (0);
fcc37d29	538	}
f0a3ddbd BJ	539
	540	#define DBSIZE 20
	541
fcc37d29	542	htdump()
f0a3ddbd	543	{
89bd2f01	544	register struct mba_device *mi;
fcc37d29 BJ	545	register struct mba_regs *mp;
	546	register struct htdevice *htaddr;
	547	int blk, num;
	548	int start;
	549
	550	start = 0;
	551	num = maxfree;
	552	#define phys(a,b) ((b)((int)(a)&0x7fffffff))
	553	if (htinfo[0] == 0)
	554	return (ENXIO);
89bd2f01	555	mi = phys(htinfo[0], struct mba_device *);
fcc37d29	556	mp = phys(mi->mi_hd, struct mba_hd *)->mh_physmba;
9f1dae18	557	mp->mba_cr = MBCR_IE;
fcc37d29 BJ	558	htaddr = (struct htdevice *)&mp->mba_drv[mi->mi_drive];
	559	htaddr->httc = HTTC_PDP11\|HTTC_1600BPI;
	560	htaddr->htcs1 = HT_DCLR\|HT_GO;
f0a3ddbd BJ	561	while (num > 0) {
f0a3ddbd BJ	562	blk = num > DBSIZE ? DBSIZE : num;
fcc37d29 BJ	563	htdwrite(start, blk, htaddr, mp);
fcc37d29 BJ	564	start += blk;
f0a3ddbd BJ	565	num -= blk;
f0a3ddbd BJ	566	}
fcc37d29 BJ	567	hteof(htaddr);
fcc37d29 BJ	568	hteof(htaddr);
9f1dae18	569	htwait(htaddr);
fc4d0a69	570	if (htaddr->htds&HTDS_ERR)
9f1dae18 BJ	571	return (EIO);
9f1dae18 BJ	572	htaddr->htcs1 = HT_REW\|HT_GO;
a0eab615	573	return (0);
f0a3ddbd BJ	574	}
f0a3ddbd BJ	575
fcc37d29 BJ	576	htdwrite(dbuf, num, htaddr, mp)
	577	register dbuf, num;
	578	register struct htdevice *htaddr;
	579	struct mba_regs *mp;
f0a3ddbd	580	{
fcc37d29	581	register struct pte *io;
f0a3ddbd BJ	582	register int i;
f0a3ddbd BJ	583
fcc37d29 BJ	584	htwait(htaddr);
fcc37d29 BJ	585	io = mp->mba_map;
f0a3ddbd	586	for (i = 0; i < num; i++)
fcc37d29 BJ	587	(int )io++ = dbuf++ \| PG_V;
	588	htaddr->htfc = -(num*NBPG);
	589	mp->mba_sr = -1;
	590	mp->mba_bcr = -(num*NBPG);
	591	mp->mba_var = 0;
	592	htaddr->htcs1 = HT_WCOM\|HT_GO;
f0a3ddbd BJ	593	}
f0a3ddbd BJ	594
fcc37d29 BJ	595	htwait(htaddr)
fcc37d29 BJ	596	struct htdevice *htaddr;
f0a3ddbd BJ	597	{
	598	register s;
	599
	600	do
fcc37d29 BJ	601	s = htaddr->htds;
fcc37d29 BJ	602	while ((s & HTDS_DRY) == 0);
f0a3ddbd BJ	603	}
f0a3ddbd BJ	604
fcc37d29 BJ	605	hteof(htaddr)
fcc37d29 BJ	606	struct htdevice *htaddr;
f0a3ddbd BJ	607	{
f0a3ddbd BJ	608
fcc37d29 BJ	609	htwait(htaddr);
fcc37d29 BJ	610	htaddr->htcs1 = HT_WEOF\|HT_GO;
f0a3ddbd	611	}
a5cc519e	612	#endif