-/* ht.c 3.3 %H% */
+/* ht.c 4.22 82/05/12 */
+#include "tu.h"
+#if NHT > 0
/*
- * TJU16 tape driver
+ * 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 "../h/param.h"
#include "../h/systm.h"
#include "../h/buf.h"
#include "../h/file.h"
#include "../h/user.h"
#include "../h/map.h"
-#include "../h/mba.h"
+#include "../h/pte.h"
+#include "../h/mbareg.h"
+#include "../h/mbavar.h"
+#include "../h/mtio.h"
+#include "../h/ioctl.h"
+#include "../h/cmap.h"
+#include "../h/cpu.h"
+
+#include "../h/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;
+} 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 */
-struct device
+char hter_bits[] = HTER_BITS;
+char htds_bits[] = HTDS_BITS;
+
+/*ARGSUSED*/
+htattach(mi)
+ struct mba_device *mi;
{
- int htcs1;
- int htds;
- int hter;
- int htmr;
- int htas;
- int htfc;
- int htdt;
- int htck;
- int htsn;
- int httc;
-};
-
-struct buf httab;
-struct buf rhtbuf;
-struct buf chtbuf;
-
-#define NUNIT 1
-#define BUNIT 2
-#define INF 1000000
-
-char h_openf[NUNIT];
-daddr_t h_blkno[NUNIT];
-char h_flags[NUNIT];
-daddr_t h_nxrec[NUNIT];
-
-#define HTADDR ((struct device *)(MBA1 + MBA_ERB))
-
-#define GO 01
-#define WCOM 060
-#define RCOM 070
-#define NOP 0
-#define WEOF 026
-#define SFORW 030
-#define SREV 032
-#define ERASE 024
-#define REW 06
-#define DCLR 010
-#define P800 01700 /* 800 + pdp11 mode */
-#define P1600 02300 /* 1600 + pdp11 mode */
-#define IENABLE 0100
-#define RDY 0200
-#define TM 04
-#define DRY 0200
-#define EOT 02000
-#define CS 02000
-#define COR 0100000
-#define PES 040
-#define WRL 04000
-#define MOL 010000
-#define ERR 040000
-#define FCE 01000
-#define TRE 040000
-#define HARD 064023 /* UNS|OPI|NEF|FMT|RMR|ILR|ILF */
-
-#define SIO 1
-#define SSFOR 2
-#define SSREV 3
-#define SRETRY 4
-#define SCOM 5
-#define SOK 6
-
-#define H_WRITTEN 1
-htopen(dev, flag)
+}
+
+htslave(mi, ms)
+ struct mba_device *mi;
+ struct mba_slave *ms;
{
- register unit, ds;
+ register struct tu_softc *sc = &tu_softc[ms->ms_unit];
+ register struct htdevice *htaddr = (struct htdevice *)mi->mi_drv;
+
+ htaddr->httc = ms->ms_slave;
+ if (htaddr->htdt & HTDT_SPR) {
+ sc->sc_mi = mi;
+ sc->sc_slave = ms->ms_slave;
+ tutoht[ms->ms_unit] = mi->mi_unit;
+ return (1);
+ } else
+ return (0);
+}
- httab.b_flags |= B_TAPE;
- unit = minor(dev) & 03;
- if (unit >= NUNIT || h_openf[unit]) {
+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 || (sc = &tu_softc[tuunit])->sc_openf ||
+ (mi = htinfo[HTUNIT(dev)]) == 0 || mi->mi_alive == 0) {
u.u_error = ENXIO;
return;
}
- h_blkno[unit] = 0;
- h_nxrec[unit] = INF;
- h_flags[unit] = 0;
- ds = hcommand(dev, NOP);
- if ((ds&MOL)==0 || (flag && (ds&WRL)))
- u.u_error = ENXIO;
- if (u.u_error==0)
- h_openf[unit]++;
+ 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);
+ u.u_error = EIO;
+ return;
+ }
+ if ((flag&FWRITE) && (sc->sc_dsreg&HTDS_WRL)) {
+ uprintf("tu%d: no write ring\n", tuunit);
+ u.u_error = EIO;
+ return;
+ }
+ 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);
+ u.u_error = EIO;
+ return;
+ }
+ sc->sc_openf = 1;
+ sc->sc_blkno = (daddr_t)0;
+ sc->sc_nxrec = INF;
+ sc->sc_flags = 0;
+ sc->sc_dens = dens;
}
htclose(dev, flag)
+ register dev_t dev;
+ register flag;
{
- register int unit;
+ register struct tu_softc *sc = &tu_softc[TUUNIT(dev)];
- unit = minor(dev) & 03;
- if (flag == FWRITE || ((flag&FWRITE) && (h_flags[unit]&H_WRITTEN))) {
- (void) hcommand(dev, WEOF);
- (void) hcommand(dev, WEOF);
- (void) hcommand(dev, SREV);
+ 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)&4) == 0) /* no 4 -> rewind */
- (void) hcommand(dev, REW);
- h_openf[unit] = 0;
+ if ((minor(dev)&H_NOREWIND) == 0)
+ htcommand(dev, HT_REW, 0);
+ sc->sc_openf = 0;
}
-hcommand(dev, com)
+htcommand(dev, com, count)
+ dev_t dev;
+ int com, count;
{
register struct buf *bp;
+ register int s;
- bp = &chtbuf;
- (void) spl5();
- while(bp->b_flags&B_BUSY) {
+ 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);
}
- (void) spl0();
+ bp->b_flags = B_BUSY|B_READ;
+ splx(s);
bp->b_dev = dev;
- bp->b_resid = com;
+ bp->b_command = com;
+ bp->b_repcnt = count;
bp->b_blkno = 0;
- bp->b_flags = B_BUSY|B_READ;
htstrategy(bp);
+ 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;
}
htstrategy(bp)
-register struct buf *bp;
+ register struct buf *bp;
{
- register daddr_t *p;
+ 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);
+}
- if(bp != &chtbuf) {
- p = &h_nxrec[minor(bp->b_dev)&03];
- if(dbtofsb(bp->b_blkno) > *p) {
+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;
+ if (bp == &chtbuf[HTUNIT(bp->b_dev)] && bp->b_command == HT_SENSE) {
+ htaddr->htcs1 = HT_SENSE|HT_GO;
+ mbclrattn(mi);
+ }
+ 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 (dbtofsb(bp->b_blkno) > sc->sc_nxrec) {
bp->b_flags |= B_ERROR;
bp->b_error = ENXIO;
- iodone(bp);
- return;
+ return (MBU_NEXT);
}
- if(dbtofsb(bp->b_blkno) == *p && bp->b_flags&B_READ) {
+ if (dbtofsb(bp->b_blkno) == sc->sc_nxrec &&
+ bp->b_flags&B_READ) {
bp->b_resid = bp->b_bcount;
clrbuf(bp);
- iodone(bp);
- return;
+ return (MBU_NEXT);
}
- if ((bp->b_flags&B_READ)==0) {
- *p = dbtofsb(bp->b_blkno) + 1;
- h_flags[minor(bp->b_dev)&03] |= H_WRITTEN;
+ if ((bp->b_flags&B_READ)==0)
+ sc->sc_nxrec = dbtofsb(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) == dbtofsb(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);
}
- bp->av_forw = NULL;
- (void) spl5();
- if (httab.b_actf == NULL)
- httab.b_actf = bp;
- else
- httab.b_actl->av_forw = bp;
- httab.b_actl = bp;
- if (httab.b_active==0)
- htstart();
- (void) spl0();
+ if (blkno < dbtofsb(bp->b_blkno)) {
+ htaddr->htfc = blkno - dbtofsb(bp->b_blkno);
+ htaddr->htcs1 = HT_SFORW|HT_GO;
+ } else {
+ htaddr->htfc = dbtofsb(bp->b_blkno) - blkno;
+ htaddr->htcs1 = HT_SREV|HT_GO;
+ }
+ return (MBU_STARTED);
}
-htstart()
+htdtint(mi, mbsr)
+ register struct mba_device *mi;
+ int mbsr;
{
- register struct buf *bp;
- register unit, den;
- daddr_t blkno;
+ 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;
+ printf("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 = dbtofsb(bp->b_blkno);
+ } else if(bp->b_bcount > MASKREG(htaddr->htfc))
+ bp->b_resid = bp->b_bcount - MASKREG(htaddr->htfc);
+ return (MBD_DONE);
+}
- loop:
- if ((bp = httab.b_actf) == NULL)
- return;
- unit = minor(bp->b_dev);
- den = P800 | (unit&03);
- if(unit >= 8)
- den = P1600 | (unit&03);
- if((HTADDR->httc&03777) != den)
- HTADDR->httc = den;
- unit &= 03;
- blkno = h_blkno[unit];
- if (bp == &chtbuf) {
- if (bp->b_resid==NOP) {
- bp->b_resid = HTADDR->htds & 0xffff;
- goto next;
+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 (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;
}
- httab.b_active = SCOM;
- HTADDR->htfc = 0;
- HTADDR->htcs1 = bp->b_resid|GO;
- return;
+ er &= ~HTER_FCE;
+ if (er == 0)
+ ds &= ~HTDS_ERR;
}
- if (h_openf[unit] < 0 || dbtofsb(bp->b_blkno) > h_nxrec[unit])
- goto abort;
- if (blkno == dbtofsb(bp->b_blkno)) {
- httab.b_active = SIO;
- HTADDR->htfc = -bp->b_bcount;
- mbastart(bp, (int *)HTADDR);
- } else {
- if (blkno < dbtofsb(bp->b_blkno)) {
- httab.b_active = SSFOR;
- HTADDR->htfc = blkno - dbtofsb(bp->b_blkno);
- HTADDR->htcs1 = SFORW|GO;
+ if ((ds & (HTDS_ERR|HTDS_MOL)) != HTDS_MOL) {
+ if ((ds & HTDS_MOL) == 0 && sc->sc_openf > 0)
+ sc->sc_openf = -1;
+ printf("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 > dbtofsb(bp->b_blkno)) {
+ sc->sc_nxrec = dbtofsb(bp->b_blkno) - fc;
+ sc->sc_blkno = sc->sc_nxrec;
} else {
- httab.b_active = SSREV;
- HTADDR->htfc = dbtofsb(bp->b_blkno) - blkno;
- HTADDR->htcs1 = SREV|GO;
+ sc->sc_blkno = dbtofsb(bp->b_blkno) + fc;
+ sc->sc_nxrec = sc->sc_blkno - 1;
}
- }
- return;
+ else
+ sc->sc_blkno = dbtofsb(bp->b_blkno);
+ return (MBN_RETRY);
+}
- abort:
- bp->b_flags |= B_ERROR;
+htread(dev)
+ dev_t dev;
+{
- next:
- httab.b_actf = bp->av_forw;
- iodone(bp);
- goto loop;
+ htphys(dev);
+ if (u.u_error)
+ return;
+ physio(htstrategy, &rhtbuf[HTUNIT(dev)], dev, B_READ, minphys);
}
-/*ARGSUSED*/
-htintr(mbastat, as)
+htwrite(dev)
{
- register struct buf *bp;
- register int unit, state;
- int err;
- if ((bp = httab.b_actf)==NULL)
+ htphys(dev);
+ if (u.u_error)
return;
- unit = minor(bp->b_dev) & 03;
- state = httab.b_active;
- httab.b_active = 0;
- if (HTADDR->htds&(ERR|EOT|TM) || mbastat & MBAEBITS) {
- err = HTADDR->hter & 0xffff;
- if ((mbastat & MBAEBITS) || (err&HARD))
- state = 0;
- if (bp == &rhtbuf)
- err &= ~FCE;
- if ((bp->b_flags&B_READ) && (HTADDR->htds&PES))
- err &= ~(CS|COR);
- if(HTADDR->htds&EOT || (HTADDR->htds&MOL)==0) {
- if(h_openf[unit])
- h_openf[unit] = -1;
- }
- else if(HTADDR->htds&TM) {
- HTADDR->htfc = 0;
- h_nxrec[unit] = dbtofsb(bp->b_blkno);
- state = SOK;
+ physio(htstrategy, &rhtbuf[HTUNIT(dev)], dev, B_WRITE, minphys);
+}
+
+htphys(dev)
+ dev_t dev;
+{
+ 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) {
+ u.u_error = ENXIO;
+ return;
+ }
+ a = u.u_offset >> 9;
+ sc = &tu_softc[TUUNIT(dev)];
+ sc->sc_blkno = dbtofsb(a);
+ sc->sc_nxrec = dbtofsb(a)+1;
+}
+
+/*ARGSUSED*/
+htioctl(dev, cmd, addr, flag)
+ dev_t dev;
+ int cmd;
+ caddr_t addr;
+ 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 */
+ if (copyin((caddr_t)addr, (caddr_t)&mtop, sizeof(mtop))) {
+ u.u_error = EFAULT;
+ return;
}
- else if(state && err == 0)
- state = SOK;
- if(httab.b_errcnt > 4)
- deverror(bp, HTADDR->hter, mbastat);
- ((struct mba_regs *)MBA1)->mba_cr &= ~MBAIE;
- HTADDR->htcs1 = DCLR|GO;
- ((struct mba_regs *)MBA1)->mba_cr |= MBAIE;
- if (state==SIO && ++httab.b_errcnt < 10) {
- httab.b_active = SRETRY;
- h_blkno[unit]++;
- HTADDR->htfc = -1;
- HTADDR->htcs1 = SREV|GO;
+ 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:
+ u.u_error = ENXIO;
return;
}
- if (state!=SOK) {
- bp->b_flags |= B_ERROR;
- state = SIO;
+ if (callcount <= 0 || fcount <= 0) {
+ u.u_error = ENXIO;
+ return;
}
- } else if (HTADDR->htcs1 < 0) { /* SC */
- if(HTADDR->htds & ERR) {
- ((struct mba_regs *)MBA1)->mba_cr &= ~MBAIE;
- HTADDR->htcs1 = DCLR|GO;
- ((struct mba_regs *)MBA1)->mba_cr |= MBAIE;
+ while (--callcount >= 0) {
+ htcommand(dev, htops[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_dsreg&HTDS_BOT)
+ break;
}
+ geterror(bp);
+ return;
+ case MTIOCGET:
+ mtget.mt_dsreg = sc->sc_dsreg;
+ mtget.mt_erreg = sc->sc_erreg;
+ mtget.mt_resid = sc->sc_resid;
+ mtget.mt_type = MT_ISHT;
+ if (copyout((caddr_t)&mtget, addr, sizeof(mtget)))
+ u.u_error = EFAULT;
+ return;
+ default:
+ u.u_error = ENXIO;
}
- switch(state) {
- case SIO:
- case SOK:
- h_blkno[unit]++;
-
- case SCOM:
- httab.b_errcnt = 0;
- httab.b_actf = bp->av_forw;
- bp->b_resid = - (HTADDR->htfc & 0xffff);
- if (bp->b_flags & B_READ)
- bp->b_resid += bp->b_bcount;
- iodone(bp);
- break;
-
- case SRETRY:
- if((bp->b_flags&B_READ)==0) {
- httab.b_active = SSFOR;
- HTADDR->htcs1 = ERASE|GO;
- return;
- }
+}
- case SSFOR:
- case SSREV:
-#define blk dbtofsb(bp->b_blkno)
- if(HTADDR->htds & TM) {
- if(state == SSREV) {
- h_nxrec[unit] = blk - (HTADDR->htfc&0xffff);
- h_blkno[unit] = h_nxrec[unit];
- } else {
- h_nxrec[unit] = blk + (HTADDR->htfc&0xffff) - 1;
- h_blkno[unit] = blk + (HTADDR->htfc & 0xffff);
- }
- } else
- h_blkno[unit] = blk;
- break;
+#define DBSIZE 20
- default:
- return;
+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;
}
- htstart();
+ hteof(htaddr);
+ hteof(htaddr);
+ htwait(htaddr);
+ if (htaddr->htds&HTDS_ERR)
+ return (EIO);
+ htaddr->htcs1 = HT_REW|HT_GO;
+ return (0);
}
-htread(dev)
+htdwrite(dbuf, num, htaddr, mp)
+ register dbuf, num;
+ register struct htdevice *htaddr;
+ struct mba_regs *mp;
{
- htphys(dev);
- physio(htstrategy, &rhtbuf, dev, B_READ, minphys);
+ 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;
}
-htwrite(dev)
+htwait(htaddr)
+ struct htdevice *htaddr;
{
- htphys(dev);
- physio(htstrategy, &rhtbuf, dev, B_WRITE, minphys);
+ register s;
+
+ do
+ s = htaddr->htds;
+ while ((s & HTDS_DRY) == 0);
}
-htphys(dev)
+hteof(htaddr)
+ struct htdevice *htaddr;
{
- register unit;
- daddr_t a;
- unit = minor(dev) & 03;
- if(unit < NUNIT) {
- a = u.u_offset >> 9;
- h_blkno[unit] = dbtofsb(a);
- h_nxrec[unit] = dbtofsb(a)+1;
- }
+ htwait(htaddr);
+ htaddr->htcs1 = HT_WEOF|HT_GO;
}
+#endif