X-Git-Url: https://git.subgeniuskitty.com/unix-history/.git/blobdiff_plain/66b4fb093a7c3d748023845b9ed2255ceb50f26e..de59ccc2375aad4c9f0ff41f3291584ead755f15:/usr/src/sys/vax/uba/ts.c?ds=inline

diff --git a/usr/src/sys/vax/uba/ts.c b/usr/src/sys/vax/uba/ts.c
index 15ea6b8edb..e7c16ac408 100644
--- a/usr/src/sys/vax/uba/ts.c
+++ b/usr/src/sys/vax/uba/ts.c
@@ -1,484 +1,918 @@
-/*	ts.c	4.3	%G%	*/
+/*	ts.c	4.23	82/02/03	*/
 
 #include "ts.h"
 #if NTS > 0
 /*
  * TS11 tape driver
+ *
+ * TODO:
+ *	write dump code
  */
-
 #include "../h/param.h"
 #include "../h/systm.h"
 #include "../h/buf.h"
-#include "../h/conf.h"
 #include "../h/dir.h"
-#include "../h/file.h"
+#include "../h/conf.h"
 #include "../h/user.h"
-#include "../h/pte.h"
+#include "../h/file.h"
 #include "../h/map.h"
-#include "../h/uba.h"
-
-struct	device {
-	u_short	tsdb;
-	u_short	tssr;
-};
-
-struct	buf	tstab;
-struct	buf	rtsbuf;
-struct	buf	ctsbuf;
-
-#define	INF	1000000000
-
-u_short	ts_uba;
-long	ts_iouba;
-char	ts_flags;
-char	ts_openf;
-daddr_t	ts_blkno;
-daddr_t	ts_nxrec;
-
-/* status message */
-struct	sts {
-	u_short	s_sts;
-	u_short	xs0;
-	u_short	xs1;
-	u_short	xs2;
-	u_short	xs3;
-};
-
-/* Error codes in stat 0 */
-#define	TMK	0100000
-#define	RLS	040000
-#define	ONL	0100
-#define	WLE	04000
-
-/* command message */
-struct cmd {
-	u_short	c_cmd;
-	u_short	c_loba;
-	u_short	c_hiba;
-	u_short	c_size;
-};
-
-#define	ACK	0100000
-#define	CVC	040000
-#define	IE	0200
-#define	READ	01
-#define	REREAD	01001
-
-#define	SETCHR	04
-
-#define	WRITE	05
-#define	REWRITE	01005
-
-#define	SFORW	010
-#define	SREV	0410
-#define	REW	02010
-
-#define	WTM	011
-
-#define	GSTAT	017
-
-/* characteristics data */
-struct charac {
-	u_short	char_loba;
-	u_short	char_hiba;
-	u_short	char_size;
-	u_short	char_mode;
-};
-
-/* All the packets, collected */
-struct tsmesg {
-	struct	cmd ts_cmd;
-	struct	sts ts_sts;
-	struct	charac ts_char;
-	int	align;		/* Should force alignment */
-} ts;
-
-/* Bits in (unibus) status register */
-#define	SC	0100000
-#define	SSR	0200
-#define	OFL	0100
-#define	NBA	02000
-
-/* states */
-#define	SIO	1
-#define	SSFOR	2
-#define	SSREV	3
-#define SRETRY	4
-#define SCOM	5
-#define SOK	6
-
-#define H_WRITTEN 1
+#include "../h/pte.h"
+#include "../h/vm.h"
+#include "../h/ubareg.h"
+#include "../h/ubavar.h"
+#include "../h/mtio.h"
+#include "../h/ioctl.h"
+#include "../h/cmap.h"
+#include "../h/cpu.h"
+
+#include "../h/tsreg.h"
+
+/*
+ * There is a ctsbuf per tape controller.
+ * It is used as the token to pass to the internal routines
+ * to execute tape ioctls.
+ * In particular, when the tape is rewinding on close we release
+ * the user process but any further attempts to use the tape drive
+ * before the rewind completes will hang waiting for ctsbuf.
+ */
+struct	buf	ctsbuf[NTS];
+
+/*
+ * Raw tape operations use rtsbuf.  The driver
+ * notices when rtsbuf is being used and allows the user
+ * program to continue after errors and read records
+ * not of the standard length (BSIZE).
+ */
+struct	buf	rtsbuf[NTS];
+
+/*
+ * Driver unibus interface routines and variables.
+ */
+int	tsprobe(), tsslave(), tsattach(), tsdgo(), tsintr();
+struct	uba_ctlr *tsminfo[NTS];
+struct	uba_device *tsdinfo[NTS];
+struct buf	tsutab[NTS];
+u_short	tsstd[] = { 0772520, 0 };
+/*** PROBABLY DON'T NEED ALL THESE SINCE CONTROLLER == DRIVE ***/
+struct	uba_driver zsdriver =
+ { tsprobe, tsslave, tsattach, tsdgo, tsstd, "ts", tsdinfo, "zs", tsminfo, 0 };
+
+/* bits in minor device */
+#define	TSUNIT(dev)	(minor(dev)&03)
+#define	T_NOREWIND	04
+
+#define	INF	(daddr_t)1000000L
+
+/*
+ * Software state per tape transport.
+ * Also contains hardware state in message packets.
+ *
+ * 1. A tape drive is a unique-open device; we refuse opens when it is already.
+ * 2. We keep track of the current position on a block tape and seek
+ *    before operations by forward/back spacing if necessary.
+ * 3. We remember if the last operation was a write on a tape, so if a tape
+ *    is open read write and the last thing done is a write we can
+ *    write a standard end of tape mark (two eofs).
+ * 4. We remember the status registers after the last command, using
+ *    then internally and returning them to the SENSE ioctl.
+ */
+struct	ts_softc {
+	char	sc_openf;	/* lock against multiple opens */
+	char	sc_lastiow;	/* last op was a write */
+	short	sc_resid;	/* copy of last bc */
+	daddr_t	sc_blkno;	/* block number, for block device tape */
+	daddr_t	sc_nxrec;	/* position of end of tape, if known */
+	struct	ts_cmd sc_cmd;	/* the command packet */
+	struct	ts_sts sc_sts;	/* status packet, for returned status */
+	struct	ts_char sc_char; /* characteristics packet */
+	struct	ts_softc *sc_ubaddr; /* Unibus address of ts_softc structure */
+	u_short	sc_uba;		/* Unibus addr of cmd pkt for tsdb */
+	short	sc_mapped;	/* is ts_sfotc mapped in Unibus space? */
+} ts_softc[NTS];
+
+/*
+ * States for um->um_tab.b_active, the per controller state flag.
+ * This is used to sequence control in the driver.
+ */
+#define	SSEEK	1		/* seeking */
+#define	SIO	2		/* doing seq i/o */
+#define	SCOM	3		/* sending control command */
+#define	SREW	4		/* sending a drive rewind */
+
+/*
+ * Determine if there is a controller for
+ * a ts at address reg.  Our goal is to make the
+ * device interrupt.
+ */
+/*ARGSUSED*/
+tsprobe(reg)
+	caddr_t reg;
+{
+	register int br, cvec;		/* must be r11,r10; value-result */
+
+#ifdef lint
+	br = 0; cvec = br; br = cvec;
+	tsintr(0);
+#endif
+	((struct tsdevice *)reg)->tssr = 0;
+	DELAY(100);
+	if ((((struct tsdevice *)reg)->tssr & TS_NBA) == 0)
+		return(0);
+	/* IT'S TOO HARD TO MAKE THIS THING INTERRUPT JUST TO FIND ITS VECTOR */
+	cvec = ((unsigned)reg) & 07 ? 0260 : 0224;
+	br = 0x15;
+	return (1);
+}
+
+/*
+ * TS11 only supports one drive per controller;
+ * check for ui_slave == 0.
+ *
+ * DO WE REALLY NEED THIS ROUTINE???
+ */
+/*ARGSUSED*/
+tsslave(ui, reg)
+	struct uba_device *ui;
+	caddr_t reg;
+{
+
+	if (ui->ui_slave)	/* non-zero slave not allowed */
+		return(0);
+	return (1);
+}
+
+/*
+ * Record attachment of the unit to the controller.
+ *
+ * SHOULD THIS ROUTINE DO ANYTHING???
+ */
+/*ARGSUSED*/
+tsattach(ui)
+	struct uba_device *ui;
+{
+
+}
 
+/*
+ * Open the device.  Tapes are unique open
+ * devices, so we refuse if it is already open.
+ * We also check that a tape is available, and
+ * don't block waiting here; if you want to wait
+ * for a tape you should timeout in user code.
+ */
 tsopen(dev, flag)
+	dev_t dev;
+	int flag;
 {
-	register struct device *tsaddr = TSADDR;
-	static struct tsmesg *ubaddr;
+	register int tsunit;
+	register struct uba_device *ui;
+	register struct ts_softc *sc;
 
-	tstab.b_flags |= B_TAPE;
-	if (ts_openf) {
+	tsunit = TSUNIT(dev);
+	if (tsunit>=NTS || (sc = &ts_softc[tsunit])->sc_openf ||
+	    (ui = tsdinfo[tsunit]) == 0 || ui->ui_alive == 0) {
 		u.u_error = ENXIO;
 		return;
 	}
-	if (ubaddr==0 || tsaddr->tssr&(OFL|NBA) || (tsaddr->tssr&SSR)==0) {
-		long i = 0;
-		tsaddr->tssr = 0;
-		while ((tsaddr->tssr & SSR)==0) {
-			if (++i > 1000000) {
-				printf("Tape unready\n");
-				u.u_error = ENXIO;
-				return;
-			}
-		}
-	}
-	if (tsaddr->tssr&OFL) {
-		printf("Tape offline\n");
+	if (tsinit(tsunit)) {
 		u.u_error = ENXIO;
 		return;
 	}
-	if (tsaddr->tssr&NBA) {
-		ctsbuf.b_un.b_addr = (caddr_t) &ts;
-		ctsbuf.b_bcount = sizeof(ts);
-		if (ubaddr == 0)
-			ubaddr = (struct tsmesg *)ubasetup(&ctsbuf, 0);
-		ts_uba = (u_short)((long)ubaddr + (((long)ubaddr >> 16) & 03));
-		ts.ts_char.char_loba = (int)&ubaddr->ts_sts;
-		ts.ts_char.char_hiba = (u_short)((long)&ubaddr->ts_sts >> 16) & 03;
-		ts.ts_char.char_size = sizeof(ts.ts_sts);
-		ts.ts_char.char_mode = 0400;		/* Stop on 2 tape marks */
-		ts.ts_cmd.c_cmd = ACK + 04;	/* write characteristics */
-		ts.ts_cmd.c_loba = (int)&ubaddr->ts_char;
-		ts.ts_cmd.c_hiba = (u_short)((long)&ubaddr->ts_sts >> 16) & 03;
-		ts.ts_cmd.c_size = sizeof(ts.ts_sts);
-		tsaddr->tsdb = ts_uba;
+	tscommand(dev, TS_SENSE, 1);
+	if ((sc->sc_sts.s_xs0&TS_ONL) == 0) {
+		uprintf("ts%d: not online\n", tsunit);
+		u.u_error = EIO;
+		return;
+	}
+	if ((flag&(FREAD|FWRITE)) == FWRITE && (sc->sc_sts.s_xs0&TS_WLK)) {
+		uprintf("ts%d: no write ring\n", tsunit);
+		u.u_error = EIO;
+		return;
 	}
-	ts_blkno = 0;
-	ts_nxrec = INF;
-	ts_flags = 0;
-	if (u.u_error==0)
-		ts_openf++;
+	sc->sc_openf = 1;
+	sc->sc_blkno = (daddr_t)0;
+	sc->sc_nxrec = INF;
+	sc->sc_lastiow = 0;
 }
 
+/*
+ * Close tape device.
+ *
+ * If tape was open for writing or last operation was
+ * a write, then write two EOF's and backspace over the last one.
+ * Unless this is a non-rewinding special file, rewind the tape.
+ * Make the tape available to others.
+ */
 tsclose(dev, flag)
+	register dev_t dev;
+	register flag;
 {
+	register struct ts_softc *sc = &ts_softc[TSUNIT(dev)];
 
-	if (flag == FWRITE || ((flag&FWRITE) && (ts_flags&H_WRITTEN))) {
-		tscommand(WTM);
-		tscommand(WTM);
-		tscommand(SREV);
+	if (flag == FWRITE || (flag&FWRITE) && sc->sc_lastiow) {
+		tscommand(dev, TS_WEOF, 1);
+		tscommand(dev, TS_WEOF, 1);
+		tscommand(dev, TS_SREV, 1);
 	}
-	if ((minor(dev)&4) == 0)
-		tscommand(REW);
-	ts_openf = 0;
+	if ((minor(dev)&T_NOREWIND) == 0)
+		/*
+		 * 0 count means don't hang waiting for rewind complete
+		 * rather ctsbuf stays busy until the operation completes
+		 * preventing further opens from completing by
+		 * preventing a TS_SENSE from completing.
+		 */
+		tscommand(dev, TS_REW, 0);
+	sc->sc_openf = 0;
 }
 
-tscommand(com)
+/*
+ * Initialize the TS11.  Set up Unibus mapping for command
+ * packets and set device characteristics.
+ */
+tsinit(unit)
+	register int unit;
 {
-	register struct buf *bp;
+	register struct ts_softc *sc = &ts_softc[unit];
+	register struct uba_ctlr *um = tsminfo[unit];
+	register struct tsdevice *addr = (struct tsdevice *)um->um_addr;
+	register int i;
+
+	/*
+	 * Map the command and message packets into Unibus
+	 * address space.  We do all the command and message
+	 * packets at once to minimize the amount of Unibus
+	 * mapping necessary.
+	 */
+	if (sc->sc_mapped == 0) {
+		ctsbuf[unit].b_un.b_addr = (caddr_t)sc;
+		ctsbuf[unit].b_bcount = sizeof(*sc);
+		i = ubasetup(um->um_ubanum, &ctsbuf[unit], 0);
+		i &= 0777777;
+		sc->sc_ubaddr = (struct ts_softc *)i;
+		sc->sc_mapped++;
+	}
+	/*
+	 * Now initialize the TS11 controller.
+	 * Set the characteristics.
+	 */
+	if (addr->tssr & (TS_NBA|TS_OFL)) {
+		addr->tssr = 0;		/* subsystem initialize */
+		tswait(addr);
+		i = (int)&sc->sc_ubaddr->sc_cmd;	/* Unibus addr of cmd */
+		sc->sc_uba = (u_short)(i + ((i>>16)&3));
+		sc->sc_char.char_addr = (int)&sc->sc_ubaddr->sc_sts;
+		sc->sc_char.char_size = sizeof(struct ts_sts);
+		sc->sc_char.char_mode = TS_ESS;
+		sc->sc_cmd.c_cmd = TS_ACK | TS_SETCHR;
+		i = (int)&sc->sc_ubaddr->sc_char;
+		sc->sc_cmd.c_loba = i;
+		sc->sc_cmd.c_hiba = (i>>16)&3;
+		sc->sc_cmd.c_size = sizeof(struct ts_char);
+		addr->tsdb = sc->sc_uba;
+		tswait(addr);
+		if (addr->tssr & TS_NBA)
+			return(1);
+	}
+	return(0);
+}
 
-	bp = &ctsbuf;
-	spl5();
-	while(bp->b_flags&B_BUSY) {
+/*
+ * Execute a command on the tape drive
+ * a specified number of times.
+ */
+tscommand(dev, com, count)
+	dev_t dev;
+	int com, count;
+{
+	register struct buf *bp;
+	register int s;
+
+	bp = &ctsbuf[TSUNIT(dev)];
+	s = spl5();
+	while (bp->b_flags&B_BUSY) {
+		/*
+		 * This special check is because B_BUSY never
+		 * gets cleared in the non-waiting rewind case.
+		 */
+		if (bp->b_repcnt == 0 && (bp->b_flags&B_DONE))
+			break;
 		bp->b_flags |= B_WANTED;
 		sleep((caddr_t)bp, PRIBIO);
 	}
-	spl0();
-	bp->b_resid = com;
-	bp->b_blkno = 0;
 	bp->b_flags = B_BUSY|B_READ;
+	splx(s);
+	bp->b_dev = dev;
+	bp->b_repcnt = count;
+	bp->b_command = com;
+	bp->b_blkno = 0;
 	tsstrategy(bp);
+	/*
+	 * In case of rewind from close, don't wait.
+	 * This is the only case where count can be 0.
+	 */
+	if (count == 0)
+		return;
 	iowait(bp);
-	if(bp->b_flags&B_WANTED)
+	if (bp->b_flags&B_WANTED)
 		wakeup((caddr_t)bp);
-	bp->b_flags = 0;
-	return(bp->b_resid);
+	bp->b_flags &= B_ERROR;
 }
 
+/*
+ * Queue a tape operation.
+ */
 tsstrategy(bp)
-register struct buf *bp;
+	register struct buf *bp;
 {
-	register daddr_t *p;
-
-	if(bp != &ctsbuf) {
-		p = &ts_nxrec;
-		if(dbtofsb(bp->b_blkno) > *p) {
-			bp->b_flags |= B_ERROR;
-			bp->b_error = ENXIO;
-			iodone(bp);
-			return;
-		}
-		if(dbtofsb(bp->b_blkno) == *p && bp->b_flags&B_READ) {
-			bp->b_resid = bp->b_bcount;
-			iodone(bp);
-			return;
-		}
-		if ((bp->b_flags&B_READ)==0) {
-			*p = dbtofsb(bp->b_blkno) + 1;
-			ts_flags |= H_WRITTEN;
-		}
-	}
+	int tsunit = TSUNIT(bp->b_dev);
+	register struct uba_ctlr *um;
+	register struct buf *dp;
+	register int s;
+
+	/*
+	 * Put transfer at end of controller queue
+	 */
 	bp->av_forw = NULL;
-	spl5();
-	if (tstab.b_actf == NULL)
-		tstab.b_actf = bp;
+	um = tsdinfo[tsunit]->ui_mi;
+	s = spl5();
+	dp = &tsutab[tsunit];
+	if (dp->b_actf == NULL)
+		dp->b_actf = bp;
 	else
-		tstab.b_actl->av_forw = bp;
-	tstab.b_actl = bp;
-	if (tstab.b_active==0)
-		tsstart();
-	spl0();
+		dp->b_actl->av_forw = bp;
+	dp->b_actl = bp;
+	um->um_tab.b_actf = um->um_tab.b_actl = dp;
+	/*
+	 * If the controller is not busy, get
+	 * it going.
+	 */
+	if (um->um_tab.b_active == 0)
+		tsstart(um);
+	splx(s);
 }
 
-tsstart()
+/*
+ * Start activity on a ts controller.
+ */
+tsstart(um)
+	register struct uba_ctlr *um;
 {
 	register struct buf *bp;
-	register struct device *tsaddr = TSADDR;
+	register struct tsdevice *addr = (struct tsdevice *)um->um_addr;
+	register struct ts_softc *sc;
+	register struct ts_cmd *tc;
+	register struct uba_device *ui;
+	int tsunit, cmd;
 	daddr_t blkno;
 
-    loop:
-	if ((bp = tstab.b_actf) == NULL)
+	/*
+	 * Start the controller if there is something for it to do.
+	 */
+loop:
+	if ((bp = um->um_tab.b_actf->b_actf) == NULL)
 		return;
-	blkno = ts_blkno;
-	if (ts_openf < 0 || dbtofsb(bp->b_blkno) > ts_nxrec)
-		goto abort;
-	if (bp == &ctsbuf) {
-		tstab.b_active = SCOM;
-		ts.ts_cmd.c_cmd = ACK+CVC+IE+bp->b_resid;
-		ts.ts_cmd.c_loba = 1;		/* count always 1 */
-	} else if (blkno == dbtofsb(bp->b_blkno)) {
-		tstab.b_active = SIO;
-		ts_iouba = ubasetup(bp, 1);
-		ts.ts_cmd.c_loba = (u_short)ts_iouba;
-		ts.ts_cmd.c_hiba = (u_short)(ts_iouba >> 16) & 03;
-		ts.ts_cmd.c_size = bp->b_bcount;
-		if(bp->b_flags & B_READ)
-			ts.ts_cmd.c_cmd = ACK+CVC+IE+READ;
+	tsunit = TSUNIT(bp->b_dev);
+	ui = tsdinfo[tsunit];
+	sc = &ts_softc[tsunit];
+	tc = &sc->sc_cmd;
+	/*
+	 * Default is that last command was NOT a write command;
+	 * if we do a write command we will notice this in tsintr().
+	 */
+	sc->sc_lastiow = 0;
+	if (sc->sc_openf < 0 || (addr->tssr&TS_OFL)) {
+		/*
+		 * Have had a hard error on a non-raw tape
+		 * or the tape unit is now unavailable
+		 * (e.g. taken off line).
+		 */
+		bp->b_flags |= B_ERROR;
+		goto next;
+	}
+	if (bp == &ctsbuf[TSUNIT(bp->b_dev)]) {
+		/*
+		 * Execute control operation with the specified count.
+		 */
+		um->um_tab.b_active =
+		    bp->b_command == TS_REW ? SREW : SCOM;
+		tc->c_repcnt = bp->b_repcnt;
+		goto dobpcmd;
+	}
+	/*
+	 * The following checks handle boundary cases for operation
+	 * on non-raw tapes.  On raw tapes the initialization of
+	 * sc->sc_nxrec by tsphys causes them to be skipped normally
+	 * (except in the case of retries).
+	 */
+	if (dbtofsb(bp->b_blkno) > sc->sc_nxrec) {
+		/*
+		 * Can't read past known end-of-file.
+		 */
+		bp->b_flags |= B_ERROR;
+		bp->b_error = ENXIO;
+		goto next;
+	}
+	if (dbtofsb(bp->b_blkno) == sc->sc_nxrec &&
+	    bp->b_flags&B_READ) {
+		/*
+		 * Reading at end of file returns 0 bytes.
+		 */
+		bp->b_resid = bp->b_bcount;
+		clrbuf(bp);
+		goto next;
+	}
+	if ((bp->b_flags&B_READ) == 0)
+		/*
+		 * Writing sets EOF
+		 */
+		sc->sc_nxrec = dbtofsb(bp->b_blkno) + 1;
+	/*
+	 * If the data transfer command is in the correct place,
+	 * set up all the registers except the csr, and give
+	 * control over to the UNIBUS adapter routines, to
+	 * wait for resources to start the i/o.
+	 */
+	if ((blkno = sc->sc_blkno) == dbtofsb(bp->b_blkno)) {
+		tc->c_size = bp->b_bcount;
+		if ((bp->b_flags&B_READ) == 0)
+			cmd = TS_WCOM;
 		else
-			ts.ts_cmd.c_cmd = ACK+CVC+IE+WRITE;
+			cmd = TS_RCOM;
+		if (um->um_tab.b_errcnt)
+			cmd |= TS_RETRY;
+		um->um_tab.b_active = SIO;
+		tc->c_cmd = TS_ACK | TS_CVC | TS_IE | cmd;
+		(void) ubago(ui);
+		return;
+	}
+	/*
+	 * Tape positioned incorrectly;
+	 * set to seek forwards or backwards to the correct spot.
+	 * This happens for raw tapes only on error retries.
+	 */
+	um->um_tab.b_active = SSEEK;
+	if (blkno < dbtofsb(bp->b_blkno)) {
+		bp->b_command = TS_SFORW;
+		tc->c_repcnt = dbtofsb(bp->b_blkno) - blkno;
 	} else {
-		if (blkno < dbtofsb(bp->b_blkno)) {
-			tstab.b_active = SSFOR;
-			ts.ts_cmd.c_cmd = ACK+CVC+IE+SFORW;
-			ts.ts_cmd.c_loba = dbtofsb(bp->b_blkno) - blkno;
-		} else {
-			tstab.b_active = SSREV;
-			ts.ts_cmd.c_cmd = ACK+CVC+IE+SREV;
-			ts.ts_cmd.c_loba = blkno - dbtofsb(bp->b_blkno);
-		}
+		bp->b_command = TS_SREV;
+		tc->c_repcnt = blkno - dbtofsb(bp->b_blkno);
 	}
-	tsaddr->tsdb = ts_uba;
+dobpcmd:
+	/*
+	 * Do the command in bp.
+	 */
+	tc->c_cmd = TS_ACK | TS_CVC | TS_IE | bp->b_command;
+	addr->tsdb = sc->sc_uba;
 	return;
 
-    abort:
-	bp->b_flags |= B_ERROR;
-
-    next:
-	tstab.b_active = 0;
-	tstab.b_actf = bp->av_forw;
+next:
+	/*
+	 * Done with this operation due to error or
+	 * the fact that it doesn't do anything.
+	 * Release UBA resources (if any), dequeue
+	 * the transfer and continue processing this slave.
+	 */
+	if (um->um_ubinfo)
+		ubadone(um);
+	um->um_tab.b_errcnt = 0;
+	um->um_tab.b_actf->b_actf = bp->av_forw;
 	iodone(bp);
 	goto loop;
 }
 
-tsintr()
+/*
+ * The UNIBUS resources we needed have been
+ * allocated to us; start the device.
+ */
+tsdgo(um)
+	register struct uba_ctlr *um;
+{
+	register struct tsdevice *addr = (struct tsdevice *)um->um_addr;
+	register struct ts_softc *sc = &ts_softc[um->um_ctlr];
+	register int i;
+
+	i = um->um_ubinfo & 0777777;
+	sc->sc_cmd.c_loba = i;
+	sc->sc_cmd.c_hiba = (i>>16)&3;
+	addr->tsdb = sc->sc_uba;
+}
+
+/*
+ * Ts interrupt routine.
+ */
+/*ARGSUSED*/
+tsintr(ts11)
+	int ts11;
 {
 	register struct buf *bp;
-	register struct device *tsaddr = TSADDR;
-	register err, errclass, state;
+	register struct uba_ctlr *um = tsminfo[ts11];
+	register struct tsdevice *addr;
+	register struct ts_softc *sc;
+	int tsunit;
+	register state;
 
-	if ((bp = tstab.b_actf)==NULL)
+	if ((bp = um->um_tab.b_actf->b_actf) == NULL)
 		return;
-	state = tstab.b_active;
-	tstab.b_active = 0;
-	err = tsaddr->tssr & 016;
-	if ((tsaddr->tssr & SC) == 0)
-		err = 0;
-	errclass = 0;
-	switch (err) {
-	case 014:		/* unrecoverable */
-	case 016:		/* fatal */
-	case 002:		/* attention (shouldn't happen) */
-	case 012:		/* "recoverable", but shouldn't happen */
-		errclass = 2;
-		break;
-
-	case 0:			/* all OK */
-		break;
-
-	case 004:		/* status alert */
-		if (ts.ts_sts.xs0&RLS && bp==&rtsbuf)	/* short record */
+	tsunit = TSUNIT(bp->b_dev);
+	addr = (struct tsdevice *)tsdinfo[tsunit]->ui_addr;
+	/*
+	 * If last command was a rewind, and tape is still
+	 * rewinding, wait for the rewind complete interrupt.
+	 *
+	 * SHOULD NEVER GET AN INTERRUPT IN THIS STATE.
+	 */
+	if (um->um_tab.b_active == SREW) {
+		um->um_tab.b_active = SCOM;
+		if ((addr->tssr&TS_SSR) == 0)
+			return;
+	}
+	/*
+	 * An operation completed... record status
+	 */
+	sc = &ts_softc[tsunit];
+	if ((bp->b_flags & B_READ) == 0)
+		sc->sc_lastiow = 1;
+	state = um->um_tab.b_active;
+	um->um_tab.b_active = 0;
+	/*
+	 * Check for errors.
+	 */
+	if (addr->tssr&TS_SC) {
+		switch (addr->tssr & TS_TC) {
+		case TS_UNREC:		/* unrecoverable */
+		case TS_FATAL:		/* fatal error */
+		case TS_ATTN:		/* attention (shouldn't happen) */
+		case TS_RECNM:		/* recoverable, no motion */
 			break;
-		if (ts.ts_sts.xs0 & TMK) {		/* tape mark */
-			ts.ts_sts.rbpcr = bp->b_bcount;
+
+		case TS_SUCC:		/* success termination */
+			printf("ts%d: success\n", TSUNIT(minor(bp->b_dev)));
+			goto ignoreerr;
+
+		case TS_ALERT:		/* tape status alert */
+			/*
+			 * If we hit the end of the tape file,
+			 * update our position.
+			 */
+			if (sc->sc_sts.s_xs0 & (TS_TMK|TS_EOT)) {
+				tsseteof(bp);		/* set blkno and nxrec */
+				state = SCOM;		/* force completion */
+				/*
+				 * Stuff bc so it will be unstuffed correctly
+				 * later to get resid.
+				 */
+				sc->sc_sts.s_rbpcr = bp->b_bcount;
+				goto opdone;
+			}
+			/*
+			 * If we were reading raw tape and the record was too long
+			 * or too short, then we don't consider this an error.
+			 */
+			if (bp == &rtsbuf[TSUNIT(bp->b_dev)] && (bp->b_flags&B_READ) &&
+			    sc->sc_sts.s_xs0&(TS_RLS|TS_RLL))
+				goto ignoreerr;
+		case TS_RECOV:		/* recoverable, tape moved */
+			/*
+			 * If this was an i/o operation retry up to 8 times.
+			 */
+			if (state==SIO) {
+				if (++um->um_tab.b_errcnt < 7) {
+					ubadone(um);
+					goto opcont;
+				} else
+					sc->sc_blkno++;
+			} else {
+				/*
+				 * Non-i/o errors on non-raw tape
+				 * cause it to close.
+				 */
+				if (sc->sc_openf>0 && bp != &rtsbuf[TSUNIT(bp->b_dev)])
+					sc->sc_openf = -1;
+			}
+			break;
+
+		case TS_REJECT:		/* function reject */
+			if (state == SIO && sc->sc_sts.s_xs0 & TS_WLE)
+				printf("ts%d: write locked\n", TSUNIT(bp->b_dev));
+			if ((sc->sc_sts.s_xs0 & TS_ONL) == 0)
+				printf("ts%d: offline\n", TSUNIT(bp->b_dev));
 			break;
 		}
-		errclass = 1;
-		break;
-
-	case 010:		/* recoverable, tape moved */
-		if (state==SIO && ++bp->b_errcnt < 10) {
-			ts.ts_cmd.c_cmd |= 01000;	/* redo bit */
-			tstab.b_active = SIO;
-			tsaddr->tsdb = ts_uba;
-			return;
-		}
-		errclass = 1;
-		break;
-
-	case 006:		/* Function reject */
-		if (state==SIO && ts.ts_sts.xs0 & WLE)
-			printf("Tape needs a ring\n");
-		if ((ts.ts_sts.xs0&ONL) == 0)		/* tape offline */
-			printf("Tape offline\n");
-		errclass = 2;
+		/*
+		 * Couldn't recover error
+		 */
+		printf("ts%d: hard error bn%d xs0=%b", TSUNIT(bp->b_dev),
+		    bp->b_blkno, sc->sc_sts.s_xs0, TSXS0_BITS);
+		if (sc->sc_sts.s_xs1)
+			printf(" xs1=%b", sc->sc_sts.s_xs1, TSXS1_BITS);
+		if (sc->sc_sts.s_xs2)
+			printf(" xs2=%b", sc->sc_sts.s_xs2, TSXS2_BITS);
+		if (sc->sc_sts.s_xs3)
+			printf(" xs3=%b", sc->sc_sts.s_xs3, TSXS3_BITS);
+		printf("\n");
+		bp->b_flags |= B_ERROR;
+		goto opdone;
 	}
-	if (errclass)
-		printf("tp: %o %o %o %o %o %o %o %o\n", tsaddr->tssr,
-		  ts.ts_sts.s_sts, ts.ts_sts.len, ts.ts_sts.rbpcr,
-		  ts.ts_sts.xs0, ts.ts_sts.xs1, ts.ts_sts.xs2, ts.ts_sts.xs3);
-	switch(state) {
+	/*
+	 * Advance tape control FSM.
+	 */
+ignoreerr:
+	switch (state) {
+
 	case SIO:
-		ts_blkno++;
-		if (ts_iouba)
-			ubafree(ts_iouba);
-		else
-			printf("uba alloc botch\n");
-		ts_iouba = 0;
+		/*
+		 * Read/write increments tape block number
+		 */
+		sc->sc_blkno++;
+		goto opdone;
+
 	case SCOM:
-		tstab.b_errcnt = 0;
-		tstab.b_actf = bp->av_forw;
-		bp->b_resid = ts.ts_sts.rbpcr;
-		iodone(bp);
-		break;
+		/*
+		 * For forward/backward space record update current position.
+		 */
+		if (bp == &ctsbuf[TSUNIT(bp->b_dev)])
+		switch (bp->b_command) {
+
+		case TS_SFORW:
+			sc->sc_blkno += bp->b_repcnt;
+			break;
 
-	case SSFOR:
-	case SSREV:
-		ts_blkno = dbtofsb(bp->b_blkno);
-		break;
+		case TS_SREV:
+			sc->sc_blkno -= bp->b_repcnt;
+			break;
+		}
+		goto opdone;
+
+	case SSEEK:
+		sc->sc_blkno = dbtofsb(bp->b_blkno);
+		goto opcont;
 
 	default:
-		printf("Unknown tape interrupt\n");
-		errclass = 2;
-		break;
+		panic("tsintr");
 	}
-	if (errclass > 1) {
-		while (bp = tstab.b_actf) {
-			bp->b_flags |= B_ERROR;
-			iodone(bp);
-			tstab.b_actf = bp->av_forw;
+opdone:
+	/*
+	 * Reset error count and remove
+	 * from device queue.
+	 */
+	um->um_tab.b_errcnt = 0;
+	um->um_tab.b_actf->b_actf = bp->av_forw;
+	bp->b_resid = sc->sc_sts.s_rbpcr;
+	ubadone(um);
+	iodone(bp);
+	if (um->um_tab.b_actf->b_actf == 0)
+		return;
+opcont:
+	tsstart(um);
+}
+
+tsseteof(bp)
+	register struct buf *bp;
+{
+	register int tsunit = TSUNIT(bp->b_dev);
+	register struct ts_softc *sc = &ts_softc[tsunit];
+
+	if (bp == &ctsbuf[TSUNIT(bp->b_dev)]) {
+		if (sc->sc_blkno > dbtofsb(bp->b_blkno)) {
+			/* reversing */
+			sc->sc_nxrec = dbtofsb(bp->b_blkno) - sc->sc_sts.s_rbpcr;
+			sc->sc_blkno = sc->sc_nxrec;
+		} else {
+			/* spacing forward */
+			sc->sc_blkno = dbtofsb(bp->b_blkno) + sc->sc_sts.s_rbpcr;
+			sc->sc_nxrec = sc->sc_blkno - 1;
 		}
-	}
-	tsstart();
+		return;
+	} 
+	/* eof on read */
+	sc->sc_nxrec = dbtofsb(bp->b_blkno);
 }
 
 tsread(dev)
+	dev_t dev;
 {
+
 	tsphys(dev);
-	physio(tsstrategy, &rtsbuf, dev, B_READ, minphys);
+	if (u.u_error)
+		return;
+	physio(tsstrategy, &rtsbuf[TSUNIT(dev)], dev, B_READ, minphys);
 }
 
 tswrite(dev)
+	dev_t dev;
 {
+
 	tsphys(dev);
-	physio(tsstrategy, &rtsbuf, dev, B_WRITE, minphys);
+	if (u.u_error)
+		return;
+	physio(tsstrategy, &rtsbuf[TSUNIT(dev)], dev, B_WRITE, minphys);
 }
 
+/*
+ * Check that a raw device exists.
+ * If it does, set up sc_blkno and sc_nxrec
+ * so that the tape will appear positioned correctly.
+ */
 tsphys(dev)
+	dev_t dev;
 {
-	register unit;
-	daddr_t a;
+	register int tsunit = TSUNIT(dev);
+	register daddr_t a;
+	register struct ts_softc *sc;
+	register struct uba_device *ui;
 
-	a = u.u_offset >> 9;
-	ts_blkno = dbtofsb(a);
-	ts_nxrec = dbtofsb(a)+1;
+	if (tsunit >= NTS || (ui=tsdinfo[tsunit]) == 0 || ui->ui_alive == 0) {
+		u.u_error = ENXIO;
+		return;
+	}
+	sc = &ts_softc[tsunit];
+	a = dbtofsb(u.u_offset >> 9);
+	sc->sc_blkno = a;
+	sc->sc_nxrec = a + 1;
 }
 
-#define	UBMAP	(int *)0xf30800
-
-int dtsinfo;
-
-twall(start, num)
+tsreset(uban)
+	int uban;
 {
-	register struct device *tsaddr = TSPHYS;
-	register int *ubap = UBMAP;
-	register int p, i;
-
-	tsinit();
-	/* dump mem */
-	p = PG_V;
-	i = 0;
-	while (i<num) {
-		*(ubap) = p|i++;
-		*(ubap+1) = p|i;
-		dts.ts_cmd.c_loba = 0;
-		dts.ts_cmd.c_hiba = 0;
-		dts.ts_cmd.c_size = NBPG;
-		dts.ts_cmd.c_cmd = ACK+CVC+WRITE;
-		tsaddr->tsdb = dtsinfo;
-		twait();
+	register struct uba_ctlr *um;
+	register struct uba_device *ui;
+	register struct buf *dp;
+	register ts11;
+
+	for (ts11 = 0; ts11 < NTS; ts11++) {
+		if ((um = tsminfo[ts11]) == 0 || um->um_alive == 0 ||
+		   um->um_ubanum != uban)
+			continue;
+		printf(" ts%d", ts11);
+		um->um_tab.b_active = 0;
+		um->um_tab.b_actf = um->um_tab.b_actl = 0;
+		if (ts_softc[ts11].sc_openf > 0)
+			ts_softc[ts11].sc_openf = -1;
+		if (um->um_ubinfo) {
+			printf("<%d>", (um->um_ubinfo>>28)&0xf);
+			ubadone(um);
+		}
+		if ((ui = tsdinfo[ts11]) && ui->ui_mi == um && ui->ui_alive) {
+			dp = &tsutab[ts11];
+			dp->b_active = 0;
+			dp->b_forw = 0;
+			if (um->um_tab.b_actf == NULL)
+				um->um_tab.b_actf = dp;
+			else
+				um->um_tab.b_actl->b_forw = dp;
+			um->um_tab.b_actl = dp;
+		}
+		(void) tsinit(ts11);
+		tsstart(um);
 	}
-	printf("done\n");
 }
 
-tsinit()
+/*ARGSUSED*/
+tsioctl(dev, cmd, addr, flag)
+	caddr_t addr;
+	dev_t dev;
 {
-	register struct device *tsaddr = TSPHYS;
-	register struct tsmesg *tsm;
-	register int *ubap = UBMAP;
-	register i;
-
-	tsaddr->tssr = 0;
-	while ((tsaddr->tssr&SSR)==0)
-		;
-	i = (int)&dts;
-	i &= 0xefffff;
-	dtsinfo = ((i&0777)|02000);
-	tsm = (struct tsmesg *)dtsinfo;
-	i >>= 9;
-	i |= PG_V;
-	*(ubap+2) = i;
-	*(ubap+3) = i+1;
-	dts.ts_cmd.c_cmd = ACK + 04;
-	dts.ts_cmd.c_loba = &tsm->ts_char;
-	dts.ts_cmd.c_hiba = 0;
-	dts.ts_cmd.c_size = sizeof(dts.ts_char);
-	dts.ts_char.char_loba = &tsm->ts_sts;
-	dts.ts_char.char_hiba = 0;
-	dts.ts_char.char_size = sizeof(dts.ts_sts);
-	dts.ts_char.char_mode = 0400;
-	tsaddr->tsdb = dtsinfo;
-	twait();
+	int tsunit = TSUNIT(dev);
+	register struct ts_softc *sc = &ts_softc[tsunit];
+	register struct buf *bp = &ctsbuf[TSUNIT(dev)];
+	register callcount;
+	int fcount;
+	struct mtop mtop;
+	struct mtget mtget;
+	/* we depend of the values and order of the MT codes here */
+	static tsops[] =
+	 {TS_WEOF,TS_SFORWF,TS_SREVF,TS_SFORW,TS_SREV,TS_REW,TS_OFFL,TS_SENSE};
+
+	switch (cmd) {
+	case MTIOCTOP:	/* tape operation */
+		if (copyin((caddr_t)addr, (caddr_t)&mtop, sizeof(mtop))) {
+			u.u_error = EFAULT;
+			return;
+		}
+		switch(mtop.mt_op) {
+		case MTWEOF:
+			callcount = mtop.mt_count;
+			fcount = 1;
+			break;
+		case MTFSF: case MTBSF:
+		case MTFSR: case MTBSR:
+			callcount = 1;
+			fcount = mtop.mt_count;
+			break;
+		case MTREW: case MTOFFL: case MTNOP:
+			callcount = 1;
+			fcount = 1;
+			break;
+		default:
+			u.u_error = ENXIO;
+			return;
+		}
+		if (callcount <= 0 || fcount <= 0) {
+			u.u_error = ENXIO;
+			return;
+		}
+		while (--callcount >= 0) {
+			tscommand(dev, tsops[mtop.mt_op], fcount);
+			if ((mtop.mt_op == MTFSR || mtop.mt_op == MTBSR) &&
+			    bp->b_resid) {
+				u.u_error = EIO;
+				break;
+			}
+			if ((bp->b_flags&B_ERROR) || sc->sc_sts.s_xs0&TS_BOT)
+				break;
+		}
+		geterror(bp);
+		return;
+	case MTIOCGET:
+		mtget.mt_dsreg = 0;
+		mtget.mt_erreg = sc->sc_sts.s_xs0;
+		mtget.mt_resid = sc->sc_resid;
+		mtget.mt_type = MT_ISTS;
+		if (copyout((caddr_t)&mtget, addr, sizeof(mtget)))
+			u.u_error = EFAULT;
+		return;
+	default:
+		u.u_error = ENXIO;
+	}
 }
 
-teof()
-{
+#define	DBSIZE	20
 
-	dtscommand(WTM);
+tsdump()
+{
+	register struct uba_device *ui;
+	register struct uba_regs *up;
+	register struct tsdevice *addr;
+	int blk, num;
+	int start;
+
+	start = 0;
+	num = maxfree;
+#define	phys(a,b)	((b)((int)(a)&0x7fffffff))
+	if (tsdinfo[0] == 0)
+		return (ENXIO);
+	ui = phys(tsdinfo[0], struct uba_device *);
+	up = phys(ui->ui_hd, struct uba_hd *)->uh_physuba;
+	ubainit(up);
+	DELAY(1000000);
+	addr = (struct tsdevice *)ui->ui_physaddr;
+	addr->tssr = 0;
+	tswait(addr);
+	while (num > 0) {
+		blk = num > DBSIZE ? DBSIZE : num;
+		tsdwrite(start, blk, addr, up);
+		start += blk;
+		num -= blk;
+	}
+	tseof(addr);
+	tseof(addr);
+	tswait(addr);
+	if (addr->tssr&TS_SC)
+		return (EIO);
+	addr->tssr = 0;
+	tswait(addr);
+	return (0);
 }
 
-rewind()
+tsdwrite(dbuf, num, addr, up)
+	register dbuf, num;
+	register struct tsdevice *addr;
+	struct uba_regs *up;
 {
-
-	dtscommand(REW);
+	register struct pte *io;
+	register int npf;
+
+	tswait(addr);
+	io = up->uba_map;
+	npf = num+1;
+	while (--npf != 0)
+		 *(int *)io++ = (dbuf++ | (1<<UBAMR_DPSHIFT) | UBAMR_MRV);
+	*(int *)io = 0;
+#ifdef notyet
+	addr->tsbc = -(num*NBPG);
+	addr->tsba = 0;
+	addr->tscs = TS_WCOM | TM_GO;
+#endif
 }
 
-dtscommand(com)
+tswait(addr)
+	register struct tsdevice *addr;
 {
-	register struct device *tsaddr = TSPHYS;
+	register s;
 
-	dts.ts_cmd.c_cmd = ACK+CVC+com;
-	dts.ts_cmd.c_loba = 1;
-	tsaddr->tsdb = dtsinfo;
-	twait();
+	do
+		s = addr->tssr;
+	while ((s & TS_SSR) == 0);
 }
 
-twait()
+tseof(addr)
+	struct tsdevice *addr;
 {
-	register struct device *tsaddr = TSPHYS;
-	register i;
-
-	while ((tsaddr->tssr&SSR)==0)
-		;
-	i = tsaddr->tssr;
-	if (i&SC)
-		printf("tssr %x ", i);
+
+	tswait(addr);
+#ifdef notyet
+	addr->tscs = TS_WEOF | TM_GO;
+#endif
 }
 #endif