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1.1 root 1: /*
2: * Copyright (c) 1982, 1986 Regents of the University of California.
3: * All rights reserved. The Berkeley software License Agreement
4: * specifies the terms and conditions for redistribution.
5: *
6: * @(#)ht.c 7.1 (Berkeley) 6/5/86
7: */
8:
9: #include "tu.h"
10: #if NHT > 0
11: /*
12: * TM03/TU?? tape driver
13: *
14: * TODO:
15: * cleanup messages on errors
16: * test ioctl's
17: * see how many rewind interrups we get if we kick when not at BOT
18: * fixup rle error on block tape code
19: */
20: #include "../machine/pte.h"
21:
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"
34: #include "tty.h"
35:
36: #include "../vax/cpu.h"
37: #include "mbareg.h"
38: #include "mbavar.h"
39: #include "htreg.h"
40:
41: struct buf rhtbuf[NHT];
42: struct buf chtbuf[NHT];
43:
44: short httypes[] =
45: { MBDT_TM03, MBDT_TE16, MBDT_TU45, MBDT_TU77, 0 };
46: struct mba_device *htinfo[NHT];
47: int htattach(), htslave(), htustart(), htndtint(), htdtint();
48: struct mba_driver htdriver =
49: { htattach, htslave, htustart, 0, htdtint, htndtint,
50: httypes, "ht", "tu", htinfo };
51:
52: #define MASKREG(r) ((r) & 0xffff)
53:
54: /* bits in minor device */
55: #define TUUNIT(dev) (minor(dev)&03)
56: #define H_NOREWIND 04
57: #define H_1600BPI 08
58:
59: #define HTUNIT(dev) (tutoht[TUUNIT(dev)])
60:
61: #define INF (daddr_t)1000000L /* a block number that wont exist */
62:
63: struct tu_softc {
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;
72: struct mba_device *sc_mi;
73: int sc_slave;
74: struct tty *sc_ttyp; /* record user's tty for errors */
75: } tu_softc[NTU];
76: short tutoht[NTU];
77:
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 */
84:
85: char hter_bits[] = HTER_BITS;
86: char htds_bits[] = HTDS_BITS;
87:
88: /*ARGSUSED*/
89: htattach(mi)
90: struct mba_device *mi;
91: {
92:
93: }
94:
95: htslave(mi, ms, sn)
96: struct mba_device *mi;
97: struct mba_slave *ms;
98: int sn;
99: {
100: register struct tu_softc *sc = &tu_softc[ms->ms_unit];
101: register struct htdevice *htaddr = (struct htdevice *)mi->mi_drv;
102:
103: htaddr->httc = sn;
104: if (htaddr->htdt & HTDT_SPR) {
105: sc->sc_mi = mi;
106: sc->sc_slave = sn;
107: tutoht[ms->ms_unit] = mi->mi_unit;
108: return (1);
109: } else
110: return (0);
111: }
112:
113: htopen(dev, flag)
114: dev_t dev;
115: int flag;
116: {
117: register int tuunit;
118: register struct mba_device *mi;
119: register struct tu_softc *sc;
120: int olddens, dens;
121:
122: tuunit = TUUNIT(dev);
123: if (tuunit >= NTU || (mi = htinfo[HTUNIT(dev)]) == 0 ||
124: mi->mi_alive == 0)
125: return (ENXIO);
126: if ((sc = &tu_softc[tuunit])->sc_openf)
127: return (EBUSY);
128: olddens = sc->sc_dens;
129: dens = sc->sc_dens =
130: ((minor(dev)&H_1600BPI)?HTTC_1600BPI:HTTC_800BPI)|
131: HTTC_PDP11|sc->sc_slave;
132: htcommand(dev, HT_SENSE, 1);
133: sc->sc_dens = olddens;
134: if ((sc->sc_dsreg & HTDS_MOL) == 0) {
135: uprintf("tu%d: not online\n", tuunit);
136: return (EIO);
137: }
138: if ((flag&FWRITE) && (sc->sc_dsreg&HTDS_WRL)) {
139: uprintf("tu%d: no write ring\n", tuunit);
140: return (EIO);
141: }
142: if ((sc->sc_dsreg & HTDS_BOT) == 0 && (flag&FWRITE) &&
143: dens != sc->sc_dens) {
144: uprintf("tu%d: can't change density in mid-tape\n", tuunit);
145: return (EIO);
146: }
147: sc->sc_openf = 1;
148: sc->sc_blkno = (daddr_t)0;
149: sc->sc_nxrec = INF;
150: sc->sc_flags = 0;
151: sc->sc_dens = dens;
152: sc->sc_ttyp = u.u_ttyp;
153: return (0);
154: }
155:
156: htclose(dev, flag)
157: register dev_t dev;
158: register flag;
159: {
160: register struct tu_softc *sc = &tu_softc[TUUNIT(dev)];
161:
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);
166: }
167: if ((minor(dev)&H_NOREWIND) == 0)
168: htcommand(dev, HT_REW, 0);
169: sc->sc_openf = 0;
170: }
171:
172: htcommand(dev, com, count)
173: dev_t dev;
174: int com, count;
175: {
176: register struct buf *bp;
177: register int s;
178:
179: bp = &chtbuf[HTUNIT(dev)];
180: s = spl5();
181: while (bp->b_flags&B_BUSY) {
182: if(bp->b_repcnt == 0 && (bp->b_flags&B_DONE))
183: break;
184: bp->b_flags |= B_WANTED;
185: sleep((caddr_t)bp, PRIBIO);
186: }
187: bp->b_flags = B_BUSY|B_READ;
188: splx(s);
189: bp->b_dev = dev;
190: bp->b_command = com;
191: bp->b_repcnt = count;
192: bp->b_blkno = 0;
193: htstrategy(bp);
194: if (count == 0)
195: return;
196: iowait(bp);
197: if (bp->b_flags&B_WANTED)
198: wakeup((caddr_t)bp);
199: bp->b_flags &= B_ERROR;
200: }
201:
202: htstrategy(bp)
203: register struct buf *bp;
204: {
205: register struct mba_device *mi = htinfo[HTUNIT(bp->b_dev)];
206: register struct buf *dp;
207: register int s;
208:
209: bp->av_forw = NULL;
210: dp = &mi->mi_tab;
211: s = spl5();
212: if (dp->b_actf == NULL)
213: dp->b_actf = bp;
214: else
215: dp->b_actl->av_forw = bp;
216: dp->b_actl = bp;
217: if (dp->b_active == 0)
218: mbustart(mi);
219: splx(s);
220: }
221:
222: htustart(mi)
223: register struct mba_device *mi;
224: {
225: register struct htdevice *htaddr =
226: (struct htdevice *)mi->mi_drv;
227: register struct buf *bp = mi->mi_tab.b_actf;
228: register struct tu_softc *sc = &tu_softc[TUUNIT(bp->b_dev)];
229: daddr_t blkno;
230:
231: htaddr->httc = sc->sc_dens;
232: #ifdef notdef
233: /* unneeded, may hang controller */
234: if (bp == &chtbuf[HTUNIT(bp->b_dev)] && bp->b_command == HT_SENSE) {
235: htaddr->htcs1 = HT_SENSE|HT_GO;
236: mbclrattn(mi);
237: }
238: #endif
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: }
250: if (bp != &chtbuf[HTUNIT(bp->b_dev)]) {
251: if (bdbtofsb(bp->b_blkno) > sc->sc_nxrec) {
252: bp->b_flags |= B_ERROR;
253: bp->b_error = ENXIO;
254: return (MBU_NEXT);
255: }
256: if (bdbtofsb(bp->b_blkno) == sc->sc_nxrec &&
257: bp->b_flags&B_READ) {
258: bp->b_resid = bp->b_bcount;
259: clrbuf(bp);
260: return (MBU_NEXT);
261: }
262: if ((bp->b_flags&B_READ)==0)
263: sc->sc_nxrec = bdbtofsb(bp->b_blkno) + 1;
264: } else {
265: if (bp->b_command == HT_SENSE)
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: }
274: if ((blkno = sc->sc_blkno) == bdbtofsb(bp->b_blkno)) {
275: htaddr->htfc = -bp->b_bcount;
276: if ((bp->b_flags&B_READ) == 0) {
277: if (mi->mi_tab.b_errcnt) {
278: if ((sc->sc_flags & H_ERASED) == 0) {
279: sc->sc_flags |= H_ERASED;
280: htaddr->htcs1 = HT_ERASE | HT_GO;
281: return (MBU_STARTED);
282: }
283: sc->sc_flags &= ~H_ERASED;
284: }
285: if (htaddr->htds & HTDS_EOT) {
286: bp->b_resid = bp->b_bcount;
287: bp->b_flags |= B_ERROR;
288: return (MBU_NEXT);
289: }
290: }
291: return (MBU_DODATA);
292: }
293: if (blkno < bdbtofsb(bp->b_blkno)) {
294: htaddr->htfc = blkno - bdbtofsb(bp->b_blkno);
295: htaddr->htcs1 = HT_SFORW|HT_GO;
296: } else {
297: htaddr->htfc = bdbtofsb(bp->b_blkno) - blkno;
298: htaddr->htcs1 = HT_SREV|HT_GO;
299: }
300: return (MBU_STARTED);
301: }
302:
303: htdtint(mi, mbsr)
304: register struct mba_device *mi;
305: int mbsr;
306: {
307: register struct htdevice *htaddr = (struct htdevice *)mi->mi_drv;
308: register struct buf *bp = mi->mi_tab.b_actf;
309: register struct tu_softc *sc;
310: int ds, er, mbs;
311:
312: sc = &tu_softc[TUUNIT(bp->b_dev)];
313: ds = sc->sc_dsreg = MASKREG(htaddr->htds);
314: er = sc->sc_erreg = MASKREG(htaddr->hter);
315: sc->sc_resid = MASKREG(htaddr->htfc);
316: mbs = mbsr;
317: sc->sc_blkno++;
318: if((bp->b_flags & B_READ) == 0)
319: sc->sc_flags |= H_WRITTEN;
320: if ((ds&(HTDS_ERR|HTDS_MOL)) != HTDS_MOL || mbs & MBSR_EBITS) {
321: htaddr->htcs1 = HT_DCLR|HT_GO;
322: mbclrattn(mi);
323: if (bp == &rhtbuf[HTUNIT(bp->b_dev)]) {
324: er &= ~HTER_FCE;
325: mbs &= ~(MBSR_DTABT|MBSR_MBEXC);
326: }
327: if (bp->b_flags & B_READ && ds & HTDS_PES)
328: er &= ~(HTER_CSITM|HTER_CORCRC);
329: if (er&HTER_HARD || mbs&MBSR_EBITS || (ds&HTDS_MOL) == 0 ||
330: er && ++mi->mi_tab.b_errcnt >= 7) {
331: if ((ds & HTDS_MOL) == 0 && sc->sc_openf > 0)
332: sc->sc_openf = -1;
333: if ((er&HTER_HARD) == HTER_FCE &&
334: (mbs&MBSR_EBITS) == (MBSR_DTABT|MBSR_MBEXC) &&
335: (ds&HTDS_MOL))
336: goto noprint;
337: tprintf(sc->sc_ttyp, "tu%d: hard error bn%d mbsr=%b er=%b ds=%b\n",
338: TUUNIT(bp->b_dev), bp->b_blkno,
339: mbsr, mbsr_bits,
340: sc->sc_erreg, hter_bits,
341: sc->sc_dsreg, htds_bits);
342: noprint:
343: bp->b_flags |= B_ERROR;
344: return (MBD_DONE);
345: }
346: if (er)
347: return (MBD_RETRY);
348: }
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;
353: sc->sc_nxrec = bdbtofsb(bp->b_blkno);
354: } else if(bp->b_bcount > MASKREG(htaddr->htfc))
355: bp->b_resid = bp->b_bcount - MASKREG(htaddr->htfc);
356: return (MBD_DONE);
357: }
358:
359: htndtint(mi)
360: register struct mba_device *mi;
361: {
362: register struct htdevice *htaddr = (struct htdevice *)mi->mi_drv;
363: register struct buf *bp = mi->mi_tab.b_actf;
364: register struct tu_softc *sc;
365: int er, ds, fc;
366:
367: ds = MASKREG(htaddr->htds);
368: er = MASKREG(htaddr->hter);
369: fc = MASKREG(htaddr->htfc);
370: if (er) {
371: htaddr->htcs1 = HT_DCLR|HT_GO;
372: mbclrattn(mi);
373: }
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)]) {
381: switch ((int)bp->b_command) {
382: case HT_REWOFFL:
383: /* offline is on purpose; don't do anything special */
384: ds |= HTDS_MOL;
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: }
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;
400: tprintf(sc->sc_ttyp, "tu%d: hard error bn%d er=%b ds=%b\n",
401: TUUNIT(bp->b_dev), bp->b_blkno,
402: sc->sc_erreg, hter_bits, sc->sc_dsreg, htds_bits);
403: bp->b_flags |= B_ERROR;
404: return (MBN_DONE);
405: }
406: if (bp == &chtbuf[HTUNIT(bp->b_dev)]) {
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)
413: if (sc->sc_blkno > bdbtofsb(bp->b_blkno)) {
414: sc->sc_nxrec = bdbtofsb(bp->b_blkno) - fc;
415: sc->sc_blkno = sc->sc_nxrec;
416: } else {
417: sc->sc_blkno = bdbtofsb(bp->b_blkno) + fc;
418: sc->sc_nxrec = sc->sc_blkno - 1;
419: }
420: else
421: sc->sc_blkno = bdbtofsb(bp->b_blkno);
422: return (MBN_RETRY);
423: }
424:
425: htread(dev, uio)
426: dev_t dev;
427: struct uio *uio;
428: {
429: int errno;
430:
431: errno = htphys(dev, uio);
432: if (errno)
433: return (errno);
434: return (physio(htstrategy, &rhtbuf[HTUNIT(dev)], dev, B_READ, minphys, uio));
435: }
436:
437: htwrite(dev, uio)
438: dev_t dev;
439: struct uio *uio;
440: {
441: int errno;
442:
443: errno = htphys(dev, uio);
444: if (errno)
445: return (errno);
446: return (physio(htstrategy, &rhtbuf[HTUNIT(dev)], dev, B_WRITE, minphys, uio));
447: }
448:
449: htphys(dev, uio)
450: dev_t dev;
451: struct uio *uio;
452: {
453: register int htunit;
454: register struct tu_softc *sc;
455: register struct mba_device *mi;
456: daddr_t a;
457:
458: htunit = HTUNIT(dev);
459: if (htunit >= NHT || (mi = htinfo[htunit]) == 0 || mi->mi_alive == 0)
460: return (ENXIO);
461: a = uio->uio_offset >> 9;
462: sc = &tu_softc[TUUNIT(dev)];
463: sc->sc_blkno = bdbtofsb(a);
464: sc->sc_nxrec = bdbtofsb(a)+1;
465: return (0);
466: }
467:
468: /*ARGSUSED*/
469: htioctl(dev, cmd, data, flag)
470: dev_t dev;
471: int cmd;
472: caddr_t data;
473: int flag;
474: {
475: register struct tu_softc *sc = &tu_softc[TUUNIT(dev)];
476: register struct buf *bp = &chtbuf[HTUNIT(dev)];
477: register callcount;
478: int fcount;
479: struct mtop *mtop;
480: struct mtget *mtget;
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) {
486:
487: case MTIOCTOP: /* tape operation */
488: mtop = (struct mtop *)data;
489: switch (mtop->mt_op) {
490:
491: case MTWEOF:
492: callcount = mtop->mt_count;
493: fcount = 1;
494: break;
495:
496: case MTFSF: case MTBSF:
497: callcount = mtop->mt_count;
498: fcount = INF;
499: break;
500:
501: case MTFSR: case MTBSR:
502: callcount = 1;
503: fcount = mtop->mt_count;
504: break;
505:
506: case MTREW: case MTOFFL:
507: callcount = 1;
508: fcount = 1;
509: break;
510:
511: default:
512: return (ENXIO);
513: }
514: if (callcount <= 0 || fcount <= 0)
515: return (EINVAL);
516: while (--callcount >= 0) {
517: htcommand(dev, htops[mtop->mt_op], fcount);
518: if ((mtop->mt_op == MTFSR || mtop->mt_op == MTBSR) &&
519: bp->b_resid)
520: return (EIO);
521: if ((bp->b_flags&B_ERROR) || sc->sc_dsreg&HTDS_BOT)
522: break;
523: }
524: return (geterror(bp));
525:
526: case MTIOCGET:
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;
532: break;
533:
534: default:
535: return (ENXIO);
536: }
537: return (0);
538: }
539:
540: #define DBSIZE 20
541:
542: htdump()
543: {
544: register struct mba_device *mi;
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);
555: mi = phys(htinfo[0], struct mba_device *);
556: mp = phys(mi->mi_hd, struct mba_hd *)->mh_physmba;
557: mp->mba_cr = MBCR_IE;
558: htaddr = (struct htdevice *)&mp->mba_drv[mi->mi_drive];
559: htaddr->httc = HTTC_PDP11|HTTC_1600BPI;
560: htaddr->htcs1 = HT_DCLR|HT_GO;
561: while (num > 0) {
562: blk = num > DBSIZE ? DBSIZE : num;
563: htdwrite(start, blk, htaddr, mp);
564: start += blk;
565: num -= blk;
566: }
567: hteof(htaddr);
568: hteof(htaddr);
569: htwait(htaddr);
570: if (htaddr->htds&HTDS_ERR)
571: return (EIO);
572: htaddr->htcs1 = HT_REW|HT_GO;
573: return (0);
574: }
575:
576: htdwrite(dbuf, num, htaddr, mp)
577: register dbuf, num;
578: register struct htdevice *htaddr;
579: struct mba_regs *mp;
580: {
581: register struct pte *io;
582: register int i;
583:
584: htwait(htaddr);
585: io = mp->mba_map;
586: for (i = 0; i < num; i++)
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;
593: }
594:
595: htwait(htaddr)
596: struct htdevice *htaddr;
597: {
598: register s;
599:
600: do
601: s = htaddr->htds;
602: while ((s & HTDS_DRY) == 0);
603: }
604:
605: hteof(htaddr)
606: struct htdevice *htaddr;
607: {
608:
609: htwait(htaddr);
610: htaddr->htcs1 = HT_WEOF|HT_GO;
611: }
612: #endif
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