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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 7.11 (Berkeley) 4/12/90
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 "param.h"
21: #include "systm.h"
22: #include "buf.h"
23: #include "conf.h"
24: #include "file.h"
25: #include "user.h"
26: #include "proc.h"
27: #include "map.h"
28: #include "ioctl.h"
29: #include "mtio.h"
30: #include "cmap.h"
31: #include "tty.h"
32: #include "syslog.h"
33:
34: #include "machine/pte.h"
35: #include "../vax/cpu.h"
36: #include "mbareg.h"
37: #include "mbavar.h"
38: #include "htreg.h"
39:
40: struct buf chtbuf[NHT];
41:
42: short httypes[] =
43: { MBDT_TM03, MBDT_TE16, MBDT_TU45, MBDT_TU77, 0 };
44: struct mba_device *htinfo[NHT];
45: struct mba_slave *tuinfo[NTU];
46: int htattach(), htslave(), htustart(), htndtint(), htdtint();
47: struct mba_driver htdriver =
48: { htattach, htslave, htustart, 0, htdtint, htndtint,
49: httypes, "ht", "tu", htinfo };
50:
51: #define MASKREG(r) ((r) & 0xffff)
52:
53: /* bits in minor device */
54: #define TUUNIT(dev) (minor(dev)&03)
55: #define H_NOREWIND 04
56: #define H_DENS(dev) ((minor(dev) >> 3) & 03)
57:
58: #define HTUNIT(dev) (tuinfo[TUUNIT(dev)]->ms_ctlr)
59:
60: #define INF (daddr_t)1000000L /* a block number that wont exist */
61:
62: struct tu_softc {
63: char sc_openf;
64: char sc_flags;
65: daddr_t sc_blkno;
66: daddr_t sc_nxrec;
67: u_short sc_erreg;
68: u_short sc_dsreg;
69: short sc_resid;
70: short sc_dens;
71: caddr_t sc_ctty; /* record user's tty for errors */
72: int sc_blks; /* number of I/O operations since open */
73: int sc_softerrs; /* number of soft I/O errors since open */
74: } tu_softc[NTU];
75:
76: /*
77: * Bits for sc_flags.
78: */
79: #define H_WRITTEN 1 /* last operation was a write */
80: #define H_ERASED 2 /* last write retry was an erase gap */
81: #define H_REWIND 4 /* last unit start was a rewind */
82:
83: char hter_bits[] = HTER_BITS;
84: char htds_bits[] = HTDS_BITS;
85:
86: /*ARGSUSED*/
87: htattach(mi)
88: struct mba_device *mi;
89: {
90:
91: }
92:
93: htslave(mi, ms, sn)
94: struct mba_device *mi;
95: struct mba_slave *ms;
96: int sn;
97: {
98: register struct htdevice *htaddr = (struct htdevice *)mi->mi_drv;
99:
100: htaddr->httc = sn;
101: if (htaddr->htdt & HTDT_SPR) {
102: tuinfo[ms->ms_unit] = ms;
103: return (1);
104: } else
105: return (0);
106: }
107:
108: int htdens[4] = { HTTC_800BPI, HTTC_1600BPI, HTTC_6250BPI, HTTC_800BPI };
109:
110: htopen(dev, flag)
111: dev_t dev;
112: int flag;
113: {
114: register int tuunit;
115: register struct tu_softc *sc;
116: register struct mba_slave *ms;
117: int olddens, dens;
118:
119: tuunit = TUUNIT(dev);
120: if (tuunit >= NTU || (ms = tuinfo[tuunit]) == NULL ||
121: ms->ms_alive == 0 || htinfo[ms->ms_ctlr]->mi_alive == 0)
122: return (ENXIO);
123: if ((sc = &tu_softc[tuunit])->sc_openf)
124: return (EBUSY);
125: sc->sc_openf = 1;
126: olddens = sc->sc_dens;
127: dens = sc->sc_dens = htdens[H_DENS(dev)] | HTTC_PDP11 | ms->ms_slave;
128: htcommand(dev, HT_SENSE, 1);
129: sc->sc_dens = olddens;
130: if ((sc->sc_dsreg & HTDS_MOL) == 0) {
131: sc->sc_openf = 0;
132: uprintf("tu%d: not online\n", tuunit);
133: return (EIO);
134: }
135: if ((flag&FWRITE) && (sc->sc_dsreg&HTDS_WRL)) {
136: sc->sc_openf = 0;
137: uprintf("tu%d: no write ring\n", tuunit);
138: return (EIO);
139: }
140: if ((sc->sc_dsreg & HTDS_BOT) == 0 && (flag&FWRITE) &&
141: dens != sc->sc_dens) {
142: sc->sc_openf = 0;
143: uprintf("tu%d: can't change density in mid-tape\n", tuunit);
144: return (EIO);
145: }
146: sc->sc_blkno = (daddr_t)0;
147: sc->sc_nxrec = INF;
148: sc->sc_flags = 0;
149: sc->sc_dens = dens;
150: sc->sc_blks = 0;
151: sc->sc_softerrs = 0;
152: sc->sc_ctty = (caddr_t)(u.u_procp->p_flag&SCTTY ?
153: u.u_procp->p_session->s_ttyp : 0);
154: return (0);
155: }
156:
157: htclose(dev, flag)
158: register dev_t dev;
159: register flag;
160: {
161: register struct tu_softc *sc = &tu_softc[TUUNIT(dev)];
162:
163: if (flag == FWRITE || ((flag&FWRITE) && (sc->sc_flags&H_WRITTEN))) {
164: htcommand(dev, HT_WEOF, 1);
165: htcommand(dev, HT_WEOF, 1);
166: htcommand(dev, HT_SREV, 1);
167: }
168: if ((minor(dev)&H_NOREWIND) == 0)
169: htcommand(dev, HT_REW, 0);
170: if (sc->sc_blks > 100 && sc->sc_softerrs > sc->sc_blks / 100)
171: log(LOG_INFO, "tu%d: %d soft errors in %d blocks\n",
172: TUUNIT(dev), sc->sc_softerrs, sc->sc_blks);
173: sc->sc_openf = 0;
174: return (0);
175: }
176:
177: htcommand(dev, com, count)
178: dev_t dev;
179: int com, count;
180: {
181: register struct buf *bp;
182: register int s;
183:
184: bp = &chtbuf[HTUNIT(dev)];
185: s = spl5();
186: while (bp->b_flags&B_BUSY) {
187: if(bp->b_repcnt == 0 && (bp->b_flags&B_DONE))
188: break;
189: bp->b_flags |= B_WANTED;
190: sleep((caddr_t)bp, PRIBIO);
191: }
192: bp->b_flags = B_BUSY|B_READ;
193: splx(s);
194: bp->b_dev = dev;
195: bp->b_command = com;
196: bp->b_repcnt = count;
197: bp->b_blkno = 0;
198: htstrategy(bp);
199: if (count == 0)
200: return;
201: iowait(bp);
202: if (bp->b_flags&B_WANTED)
203: wakeup((caddr_t)bp);
204: bp->b_flags &= B_ERROR;
205: }
206:
207: htstrategy(bp)
208: register struct buf *bp;
209: {
210: register struct mba_device *mi = htinfo[HTUNIT(bp->b_dev)];
211: register struct buf *dp;
212: register int s;
213:
214: bp->av_forw = NULL;
215: dp = &mi->mi_tab;
216: s = spl5();
217: if (dp->b_actf == NULL)
218: dp->b_actf = bp;
219: else
220: dp->b_actl->av_forw = bp;
221: dp->b_actl = bp;
222: if (dp->b_active == 0)
223: mbustart(mi);
224: splx(s);
225: }
226:
227: htustart(mi)
228: register struct mba_device *mi;
229: {
230: register struct htdevice *htaddr =
231: (struct htdevice *)mi->mi_drv;
232: register struct buf *bp = mi->mi_tab.b_actf;
233: register struct tu_softc *sc = &tu_softc[TUUNIT(bp->b_dev)];
234: daddr_t blkno;
235:
236: htaddr->httc = sc->sc_dens;
237: #ifdef notdef
238: /* unneeded, may hang controller */
239: if (bp == &chtbuf[HTUNIT(bp->b_dev)] && bp->b_command == HT_SENSE) {
240: htaddr->htcs1 = HT_SENSE|HT_GO;
241: mbclrattn(mi);
242: }
243: #endif
244: sc->sc_dsreg = htaddr->htds;
245: sc->sc_erreg = htaddr->hter;
246: sc->sc_resid = htaddr->htfc;
247: sc->sc_flags &= ~(H_WRITTEN|H_REWIND);
248: if ((htaddr->htdt & HTDT_SPR) == 0 || (htaddr->htds & HTDS_MOL) == 0)
249: if (sc->sc_openf > 0)
250: sc->sc_openf = -1;
251: if (sc->sc_openf < 0) {
252: bp->b_flags |= B_ERROR;
253: return (MBU_NEXT);
254: }
255: if (bp != &chtbuf[HTUNIT(bp->b_dev)]) {
256: /* transfer: check positioning */
257: if (bp->b_flags & B_RAW) {
258: /* raw transfer: record position for retry */
259: if (mi->mi_tab.b_errcnt == 0) {
260: sc->sc_blkno = bdbtofsb(bp->b_blkno);
261: sc->sc_nxrec = sc->sc_blkno + 1;
262: }
263: } else {
264: if (bdbtofsb(bp->b_blkno) > sc->sc_nxrec) {
265: bp->b_flags |= B_ERROR;
266: bp->b_error = ENXIO;
267: return (MBU_NEXT);
268: }
269: if (bdbtofsb(bp->b_blkno) == sc->sc_nxrec &&
270: bp->b_flags&B_READ) {
271: bp->b_resid = bp->b_bcount;
272: clrbuf(bp);
273: return (MBU_NEXT);
274: }
275: if ((bp->b_flags&B_READ)==0)
276: sc->sc_nxrec = bdbtofsb(bp->b_blkno) + 1;
277: }
278: } else {
279: if (bp->b_command == HT_SENSE)
280: return (MBU_NEXT);
281: if (bp->b_command == HT_REW)
282: sc->sc_flags |= H_REWIND;
283: else
284: htaddr->htfc = -bp->b_bcount;
285: htaddr->htcs1 = bp->b_command|HT_GO;
286: return (MBU_STARTED);
287: }
288: if ((blkno = sc->sc_blkno) == bdbtofsb(bp->b_blkno)) {
289: htaddr->htfc = -bp->b_bcount;
290: if ((bp->b_flags&B_READ) == 0) {
291: if (mi->mi_tab.b_errcnt) {
292: if ((sc->sc_flags & H_ERASED) == 0) {
293: sc->sc_flags |= H_ERASED;
294: htaddr->htcs1 = HT_ERASE | HT_GO;
295: return (MBU_STARTED);
296: }
297: sc->sc_flags &= ~H_ERASED;
298: }
299: if (htaddr->htds & HTDS_EOT) {
300: bp->b_resid = bp->b_bcount;
301: bp->b_flags |= B_ERROR;
302: return (MBU_NEXT);
303: }
304: }
305: return (MBU_DODATA);
306: }
307: if (blkno < bdbtofsb(bp->b_blkno)) {
308: htaddr->htfc = blkno - bdbtofsb(bp->b_blkno);
309: htaddr->htcs1 = HT_SFORW|HT_GO;
310: } else {
311: htaddr->htfc = bdbtofsb(bp->b_blkno) - blkno;
312: htaddr->htcs1 = HT_SREV|HT_GO;
313: }
314: return (MBU_STARTED);
315: }
316:
317: htdtint(mi, mbsr)
318: register struct mba_device *mi;
319: int mbsr;
320: {
321: register struct htdevice *htaddr = (struct htdevice *)mi->mi_drv;
322: register struct buf *bp = mi->mi_tab.b_actf;
323: register struct tu_softc *sc;
324: int ds, er, mbs;
325:
326: sc = &tu_softc[TUUNIT(bp->b_dev)];
327: ds = sc->sc_dsreg = MASKREG(htaddr->htds);
328: er = sc->sc_erreg = MASKREG(htaddr->hter);
329: sc->sc_resid = MASKREG(htaddr->htfc);
330: mbs = mbsr;
331: sc->sc_blkno++;
332: if((bp->b_flags & B_READ) == 0)
333: sc->sc_flags |= H_WRITTEN;
334: if ((ds&(HTDS_ERR|HTDS_MOL)) != HTDS_MOL || mbs & MBSR_EBITS) {
335: htaddr->htcs1 = HT_DCLR|HT_GO;
336: mbclrattn(mi);
337: if (bp->b_flags & B_RAW) {
338: er &= ~HTER_FCE;
339: mbs &= ~(MBSR_DTABT|MBSR_MBEXC);
340: }
341: if (bp->b_flags & B_READ && ds & HTDS_PES)
342: er &= ~(HTER_CSITM|HTER_CORCRC);
343: if (er&HTER_HARD || mbs&MBSR_EBITS || (ds&HTDS_MOL) == 0 ||
344: er && ++mi->mi_tab.b_errcnt >= 7) {
345: if ((ds & HTDS_MOL) == 0 && sc->sc_openf > 0)
346: sc->sc_openf = -1;
347: if ((er&HTER_HARD) == HTER_FCE &&
348: (mbs&MBSR_EBITS) == (MBSR_DTABT|MBSR_MBEXC) &&
349: (ds&HTDS_MOL))
350: goto noprint;
351: tprintf(sc->sc_ctty, "tu%d: hard error bn%d mbsr=%b er=%b ds=%b\n",
352: TUUNIT(bp->b_dev), bp->b_blkno,
353: mbsr, mbsr_bits,
354: sc->sc_erreg, hter_bits,
355: sc->sc_dsreg, htds_bits);
356: noprint:
357: bp->b_flags |= B_ERROR;
358: return (MBD_DONE);
359: }
360: if (er)
361: return (MBD_RETRY);
362: }
363: bp->b_resid = 0;
364: sc->sc_blks++;
365: if (mi->mi_tab.b_errcnt)
366: sc->sc_softerrs++;
367: if (bp->b_flags & B_READ)
368: if (ds&HTDS_TM) { /* must be a read, right? */
369: bp->b_resid = bp->b_bcount;
370: sc->sc_nxrec = bdbtofsb(bp->b_blkno);
371: } else if(bp->b_bcount > MASKREG(htaddr->htfc))
372: bp->b_resid = bp->b_bcount - MASKREG(htaddr->htfc);
373: return (MBD_DONE);
374: }
375:
376: htndtint(mi)
377: register struct mba_device *mi;
378: {
379: register struct htdevice *htaddr = (struct htdevice *)mi->mi_drv;
380: register struct buf *bp = mi->mi_tab.b_actf;
381: register struct tu_softc *sc;
382: int er, ds, fc;
383:
384: ds = MASKREG(htaddr->htds);
385: er = MASKREG(htaddr->hter);
386: fc = MASKREG(htaddr->htfc);
387: if (er) {
388: htaddr->htcs1 = HT_DCLR|HT_GO;
389: mbclrattn(mi);
390: }
391: if (bp == 0)
392: return (MBN_SKIP);
393: sc = &tu_softc[TUUNIT(bp->b_dev)];
394: sc->sc_dsreg = ds;
395: sc->sc_erreg = er;
396: sc->sc_resid = fc;
397: if (bp == &chtbuf[HTUNIT(bp->b_dev)]) {
398: switch ((int)bp->b_command) {
399: case HT_REWOFFL:
400: /* offline is on purpose; don't do anything special */
401: ds |= HTDS_MOL;
402: break;
403: case HT_SREV:
404: /* if backspace file hit bot, its not an error */
405: if (er == (HTER_NEF|HTER_FCE) && ds&HTDS_BOT &&
406: bp->b_repcnt == INF)
407: er &= ~HTER_NEF;
408: break;
409: }
410: er &= ~HTER_FCE;
411: if (er == 0)
412: ds &= ~HTDS_ERR;
413: }
414: if ((ds & (HTDS_ERR|HTDS_MOL)) != HTDS_MOL) {
415: if ((ds & HTDS_MOL) == 0 && sc->sc_openf > 0)
416: sc->sc_openf = -1;
417: tprintf(sc->sc_ctty, "tu%d: hard error bn%d er=%b ds=%b\n",
418: TUUNIT(bp->b_dev), bp->b_blkno,
419: sc->sc_erreg, hter_bits, sc->sc_dsreg, htds_bits);
420: bp->b_flags |= B_ERROR;
421: return (MBN_DONE);
422: }
423: if (bp == &chtbuf[HTUNIT(bp->b_dev)]) {
424: if (sc->sc_flags & H_REWIND)
425: return (ds & HTDS_BOT ? MBN_DONE : MBN_RETRY);
426: bp->b_resid = -sc->sc_resid;
427: return (MBN_DONE);
428: }
429: if (ds & HTDS_TM)
430: if (sc->sc_blkno > bdbtofsb(bp->b_blkno)) {
431: sc->sc_nxrec = bdbtofsb(bp->b_blkno) - fc;
432: sc->sc_blkno = sc->sc_nxrec;
433: } else {
434: sc->sc_blkno = bdbtofsb(bp->b_blkno) + fc;
435: sc->sc_nxrec = sc->sc_blkno - 1;
436: }
437: else
438: sc->sc_blkno = bdbtofsb(bp->b_blkno);
439: return (MBN_RETRY);
440: }
441:
442: /*ARGSUSED*/
443: htioctl(dev, cmd, data, flag)
444: dev_t dev;
445: int cmd;
446: caddr_t data;
447: int flag;
448: {
449: register struct tu_softc *sc = &tu_softc[TUUNIT(dev)];
450: register struct buf *bp = &chtbuf[HTUNIT(dev)];
451: register callcount;
452: int fcount, error = 0;
453: struct mtop *mtop;
454: struct mtget *mtget;
455: /* we depend of the values and order of the MT codes here */
456: static htops[] =
457: {HT_WEOF,HT_SFORW,HT_SREV,HT_SFORW,HT_SREV,HT_REW,HT_REWOFFL,HT_SENSE};
458:
459: switch (cmd) {
460:
461: case MTIOCTOP: /* tape operation */
462: mtop = (struct mtop *)data;
463: switch (mtop->mt_op) {
464:
465: case MTWEOF:
466: callcount = mtop->mt_count;
467: fcount = 1;
468: break;
469:
470: case MTFSF: case MTBSF:
471: callcount = mtop->mt_count;
472: fcount = INF;
473: break;
474:
475: case MTFSR: case MTBSR:
476: callcount = 1;
477: fcount = mtop->mt_count;
478: break;
479:
480: case MTREW: case MTOFFL:
481: callcount = 1;
482: fcount = 1;
483: break;
484:
485: default:
486: return (ENXIO);
487: }
488: if (callcount <= 0 || fcount <= 0)
489: return (EINVAL);
490: while (--callcount >= 0) {
491: htcommand(dev, htops[mtop->mt_op], fcount);
492: if ((mtop->mt_op == MTFSR || mtop->mt_op == MTBSR) &&
493: bp->b_resid)
494: return (EIO);
495: if ((bp->b_flags&B_ERROR) || sc->sc_dsreg&HTDS_BOT)
496: break;
497: }
498: if (bp->b_flags&B_ERROR)
499: if ((error = bp->b_error)==0)
500: return (EIO);
501: return (error);
502:
503: case MTIOCGET:
504: mtget = (struct mtget *)data;
505: mtget->mt_dsreg = sc->sc_dsreg;
506: mtget->mt_erreg = sc->sc_erreg;
507: mtget->mt_resid = sc->sc_resid;
508: mtget->mt_type = MT_ISHT;
509: break;
510:
511: default:
512: return (ENXIO);
513: }
514: return (0);
515: }
516:
517: #define DBSIZE 20
518:
519: htdump()
520: {
521: register struct mba_device *mi;
522: register struct mba_regs *mp;
523: register struct htdevice *htaddr;
524: int blk, num;
525: int start;
526:
527: start = 0;
528: num = maxfree;
529: #define phys(a,b) ((b)((int)(a)&0x7fffffff))
530: if (htinfo[0] == 0)
531: return (ENXIO);
532: mi = phys(htinfo[0], struct mba_device *);
533: mp = phys(mi->mi_hd, struct mba_hd *)->mh_physmba;
534: mp->mba_cr = MBCR_IE;
535: htaddr = (struct htdevice *)&mp->mba_drv[mi->mi_drive];
536: htaddr->httc = HTTC_PDP11|HTTC_1600BPI;
537: htaddr->htcs1 = HT_DCLR|HT_GO;
538: while (num > 0) {
539: blk = num > DBSIZE ? DBSIZE : num;
540: htdwrite(start, blk, htaddr, mp);
541: start += blk;
542: num -= blk;
543: }
544: hteof(htaddr);
545: hteof(htaddr);
546: htwait(htaddr);
547: if (htaddr->htds&HTDS_ERR)
548: return (EIO);
549: htaddr->htcs1 = HT_REW|HT_GO;
550: return (0);
551: }
552:
553: htdwrite(dbuf, num, htaddr, mp)
554: register dbuf, num;
555: register struct htdevice *htaddr;
556: struct mba_regs *mp;
557: {
558: register struct pte *io;
559: register int i;
560:
561: htwait(htaddr);
562: io = mp->mba_map;
563: for (i = 0; i < num; i++)
564: *(int *)io++ = dbuf++ | PG_V;
565: htaddr->htfc = -(num*NBPG);
566: mp->mba_sr = -1;
567: mp->mba_bcr = -(num*NBPG);
568: mp->mba_var = 0;
569: htaddr->htcs1 = HT_WCOM|HT_GO;
570: }
571:
572: htwait(htaddr)
573: struct htdevice *htaddr;
574: {
575: register s;
576:
577: do
578: s = htaddr->htds;
579: while ((s & HTDS_DRY) == 0);
580: }
581:
582: hteof(htaddr)
583: struct htdevice *htaddr;
584: {
585:
586: htwait(htaddr);
587: htaddr->htcs1 = HT_WEOF|HT_GO;
588: }
589: #endif
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