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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 7.6 (Berkeley) 5/6/88
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 "dir.h"
25: #include "file.h"
26: #include "user.h"
27: #include "map.h"
28: #include "ioctl.h"
29: #include "mtio.h"
30: #include "cmap.h"
31: #include "uio.h"
32: #include "tty.h"
33: #include "syslog.h"
34:
35: #include "../machine/pte.h"
36: #include "../vax/cpu.h"
37: #include "mbareg.h"
38: #include "mbavar.h"
39: #include "htreg.h"
40:
41: struct buf chtbuf[NHT];
42:
43: short httypes[] =
44: { MBDT_TM03, MBDT_TE16, MBDT_TU45, MBDT_TU77, 0 };
45: struct mba_device *htinfo[NHT];
46: struct mba_slave *tuinfo[NTU];
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_DENS(dev) ((minor(dev) >> 3) & 03)
58:
59: #define HTUNIT(dev) (tuinfo[TUUNIT(dev)]->ms_ctlr)
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 tty *sc_ttyp; /* record user's tty for errors */
73: int sc_blks; /* number of I/O operations since open */
74: int sc_softerrs; /* number of soft I/O errors since open */
75: } tu_softc[NTU];
76:
77: /*
78: * Bits for sc_flags.
79: */
80: #define H_WRITTEN 1 /* last operation was a write */
81: #define H_ERASED 2 /* last write retry was an erase gap */
82: #define H_REWIND 4 /* last unit start was a rewind */
83:
84: char hter_bits[] = HTER_BITS;
85: char htds_bits[] = HTDS_BITS;
86:
87: /*ARGSUSED*/
88: htattach(mi)
89: struct mba_device *mi;
90: {
91:
92: }
93:
94: htslave(mi, ms, sn)
95: struct mba_device *mi;
96: struct mba_slave *ms;
97: int sn;
98: {
99: register struct htdevice *htaddr = (struct htdevice *)mi->mi_drv;
100:
101: htaddr->httc = sn;
102: if (htaddr->htdt & HTDT_SPR) {
103: tuinfo[ms->ms_unit] = ms;
104: return (1);
105: } else
106: return (0);
107: }
108:
109: int htdens[4] = { HTTC_800BPI, HTTC_1600BPI, HTTC_6250BPI, HTTC_800BPI };
110:
111: htopen(dev, flag)
112: dev_t dev;
113: int flag;
114: {
115: register int tuunit;
116: register struct tu_softc *sc;
117: register struct mba_slave *ms;
118: int olddens, dens;
119:
120: tuunit = TUUNIT(dev);
121: if (tuunit >= NTU || (ms = tuinfo[tuunit]) == NULL ||
122: ms->ms_alive == 0 || htinfo[ms->ms_ctlr]->mi_alive == 0)
123: return (ENXIO);
124: if ((sc = &tu_softc[tuunit])->sc_openf)
125: return (EBUSY);
126: sc->sc_openf = 1;
127: olddens = sc->sc_dens;
128: dens = sc->sc_dens = htdens[H_DENS(dev)] | HTTC_PDP11 | ms->ms_slave;
129: htcommand(dev, HT_SENSE, 1);
130: sc->sc_dens = olddens;
131: if ((sc->sc_dsreg & HTDS_MOL) == 0) {
132: sc->sc_openf = 0;
133: uprintf("tu%d: not online\n", tuunit);
134: return (EIO);
135: }
136: if ((flag&FWRITE) && (sc->sc_dsreg&HTDS_WRL)) {
137: sc->sc_openf = 0;
138: uprintf("tu%d: no write ring\n", tuunit);
139: return (EIO);
140: }
141: if ((sc->sc_dsreg & HTDS_BOT) == 0 && (flag&FWRITE) &&
142: dens != sc->sc_dens) {
143: sc->sc_openf = 0;
144: uprintf("tu%d: can't change density in mid-tape\n", tuunit);
145: return (EIO);
146: }
147: sc->sc_blkno = (daddr_t)0;
148: sc->sc_nxrec = INF;
149: sc->sc_flags = 0;
150: sc->sc_dens = dens;
151: sc->sc_blks = 0;
152: sc->sc_softerrs = 0;
153: sc->sc_ttyp = u.u_ttyp;
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: }
175:
176: htcommand(dev, com, count)
177: dev_t dev;
178: int com, count;
179: {
180: register struct buf *bp;
181: register int s;
182:
183: bp = &chtbuf[HTUNIT(dev)];
184: s = spl5();
185: while (bp->b_flags&B_BUSY) {
186: if(bp->b_repcnt == 0 && (bp->b_flags&B_DONE))
187: break;
188: bp->b_flags |= B_WANTED;
189: sleep((caddr_t)bp, PRIBIO);
190: }
191: bp->b_flags = B_BUSY|B_READ;
192: splx(s);
193: bp->b_dev = dev;
194: bp->b_command = com;
195: bp->b_repcnt = count;
196: bp->b_blkno = 0;
197: htstrategy(bp);
198: if (count == 0)
199: return;
200: iowait(bp);
201: if (bp->b_flags&B_WANTED)
202: wakeup((caddr_t)bp);
203: bp->b_flags &= B_ERROR;
204: }
205:
206: htstrategy(bp)
207: register struct buf *bp;
208: {
209: register struct mba_device *mi = htinfo[HTUNIT(bp->b_dev)];
210: register struct buf *dp;
211: register int s;
212:
213: bp->av_forw = NULL;
214: dp = &mi->mi_tab;
215: s = spl5();
216: if (dp->b_actf == NULL)
217: dp->b_actf = bp;
218: else
219: dp->b_actl->av_forw = bp;
220: dp->b_actl = bp;
221: if (dp->b_active == 0)
222: mbustart(mi);
223: splx(s);
224: }
225:
226: htustart(mi)
227: register struct mba_device *mi;
228: {
229: register struct htdevice *htaddr =
230: (struct htdevice *)mi->mi_drv;
231: register struct buf *bp = mi->mi_tab.b_actf;
232: register struct tu_softc *sc = &tu_softc[TUUNIT(bp->b_dev)];
233: daddr_t blkno;
234:
235: htaddr->httc = sc->sc_dens;
236: #ifdef notdef
237: /* unneeded, may hang controller */
238: if (bp == &chtbuf[HTUNIT(bp->b_dev)] && bp->b_command == HT_SENSE) {
239: htaddr->htcs1 = HT_SENSE|HT_GO;
240: mbclrattn(mi);
241: }
242: #endif
243: sc->sc_dsreg = htaddr->htds;
244: sc->sc_erreg = htaddr->hter;
245: sc->sc_resid = htaddr->htfc;
246: sc->sc_flags &= ~(H_WRITTEN|H_REWIND);
247: if ((htaddr->htdt & HTDT_SPR) == 0 || (htaddr->htds & HTDS_MOL) == 0)
248: if (sc->sc_openf > 0)
249: sc->sc_openf = -1;
250: if (sc->sc_openf < 0) {
251: bp->b_flags |= B_ERROR;
252: return (MBU_NEXT);
253: }
254: if (bp != &chtbuf[HTUNIT(bp->b_dev)]) {
255: /* transfer: check positioning */
256: if (bp->b_flags & B_RAW) {
257: /* raw transfer: record position for retry */
258: if (mi->mi_tab.b_errcnt == 0) {
259: sc->sc_blkno = bdbtofsb(bp->b_blkno);
260: sc->sc_nxrec = sc->sc_blkno + 1;
261: }
262: } else {
263: if (bdbtofsb(bp->b_blkno) > sc->sc_nxrec) {
264: bp->b_flags |= B_ERROR;
265: bp->b_error = ENXIO;
266: return (MBU_NEXT);
267: }
268: if (bdbtofsb(bp->b_blkno) == sc->sc_nxrec &&
269: bp->b_flags&B_READ) {
270: bp->b_resid = bp->b_bcount;
271: clrbuf(bp);
272: return (MBU_NEXT);
273: }
274: if ((bp->b_flags&B_READ)==0)
275: sc->sc_nxrec = bdbtofsb(bp->b_blkno) + 1;
276: }
277: } else {
278: if (bp->b_command == HT_SENSE)
279: return (MBU_NEXT);
280: if (bp->b_command == HT_REW)
281: sc->sc_flags |= H_REWIND;
282: else
283: htaddr->htfc = -bp->b_bcount;
284: htaddr->htcs1 = bp->b_command|HT_GO;
285: return (MBU_STARTED);
286: }
287: if ((blkno = sc->sc_blkno) == bdbtofsb(bp->b_blkno)) {
288: htaddr->htfc = -bp->b_bcount;
289: if ((bp->b_flags&B_READ) == 0) {
290: if (mi->mi_tab.b_errcnt) {
291: if ((sc->sc_flags & H_ERASED) == 0) {
292: sc->sc_flags |= H_ERASED;
293: htaddr->htcs1 = HT_ERASE | HT_GO;
294: return (MBU_STARTED);
295: }
296: sc->sc_flags &= ~H_ERASED;
297: }
298: if (htaddr->htds & HTDS_EOT) {
299: bp->b_resid = bp->b_bcount;
300: bp->b_flags |= B_ERROR;
301: return (MBU_NEXT);
302: }
303: }
304: return (MBU_DODATA);
305: }
306: if (blkno < bdbtofsb(bp->b_blkno)) {
307: htaddr->htfc = blkno - bdbtofsb(bp->b_blkno);
308: htaddr->htcs1 = HT_SFORW|HT_GO;
309: } else {
310: htaddr->htfc = bdbtofsb(bp->b_blkno) - blkno;
311: htaddr->htcs1 = HT_SREV|HT_GO;
312: }
313: return (MBU_STARTED);
314: }
315:
316: htdtint(mi, mbsr)
317: register struct mba_device *mi;
318: int mbsr;
319: {
320: register struct htdevice *htaddr = (struct htdevice *)mi->mi_drv;
321: register struct buf *bp = mi->mi_tab.b_actf;
322: register struct tu_softc *sc;
323: int ds, er, mbs;
324:
325: sc = &tu_softc[TUUNIT(bp->b_dev)];
326: ds = sc->sc_dsreg = MASKREG(htaddr->htds);
327: er = sc->sc_erreg = MASKREG(htaddr->hter);
328: sc->sc_resid = MASKREG(htaddr->htfc);
329: mbs = mbsr;
330: sc->sc_blkno++;
331: if((bp->b_flags & B_READ) == 0)
332: sc->sc_flags |= H_WRITTEN;
333: if ((ds&(HTDS_ERR|HTDS_MOL)) != HTDS_MOL || mbs & MBSR_EBITS) {
334: htaddr->htcs1 = HT_DCLR|HT_GO;
335: mbclrattn(mi);
336: if (bp->b_flags & B_RAW) {
337: er &= ~HTER_FCE;
338: mbs &= ~(MBSR_DTABT|MBSR_MBEXC);
339: }
340: if (bp->b_flags & B_READ && ds & HTDS_PES)
341: er &= ~(HTER_CSITM|HTER_CORCRC);
342: if (er&HTER_HARD || mbs&MBSR_EBITS || (ds&HTDS_MOL) == 0 ||
343: er && ++mi->mi_tab.b_errcnt >= 7) {
344: if ((ds & HTDS_MOL) == 0 && sc->sc_openf > 0)
345: sc->sc_openf = -1;
346: if ((er&HTER_HARD) == HTER_FCE &&
347: (mbs&MBSR_EBITS) == (MBSR_DTABT|MBSR_MBEXC) &&
348: (ds&HTDS_MOL))
349: goto noprint;
350: tprintf(sc->sc_ttyp, "tu%d: hard error bn%d mbsr=%b er=%b ds=%b\n",
351: TUUNIT(bp->b_dev), bp->b_blkno,
352: mbsr, mbsr_bits,
353: sc->sc_erreg, hter_bits,
354: sc->sc_dsreg, htds_bits);
355: noprint:
356: bp->b_flags |= B_ERROR;
357: return (MBD_DONE);
358: }
359: if (er)
360: return (MBD_RETRY);
361: }
362: bp->b_resid = 0;
363: sc->sc_blks++;
364: if (mi->mi_tab.b_errcnt)
365: sc->sc_softerrs++;
366: if (bp->b_flags & B_READ)
367: if (ds&HTDS_TM) { /* must be a read, right? */
368: bp->b_resid = bp->b_bcount;
369: sc->sc_nxrec = bdbtofsb(bp->b_blkno);
370: } else if(bp->b_bcount > MASKREG(htaddr->htfc))
371: bp->b_resid = bp->b_bcount - MASKREG(htaddr->htfc);
372: return (MBD_DONE);
373: }
374:
375: htndtint(mi)
376: register struct mba_device *mi;
377: {
378: register struct htdevice *htaddr = (struct htdevice *)mi->mi_drv;
379: register struct buf *bp = mi->mi_tab.b_actf;
380: register struct tu_softc *sc;
381: int er, ds, fc;
382:
383: ds = MASKREG(htaddr->htds);
384: er = MASKREG(htaddr->hter);
385: fc = MASKREG(htaddr->htfc);
386: if (er) {
387: htaddr->htcs1 = HT_DCLR|HT_GO;
388: mbclrattn(mi);
389: }
390: if (bp == 0)
391: return (MBN_SKIP);
392: sc = &tu_softc[TUUNIT(bp->b_dev)];
393: sc->sc_dsreg = ds;
394: sc->sc_erreg = er;
395: sc->sc_resid = fc;
396: if (bp == &chtbuf[HTUNIT(bp->b_dev)]) {
397: switch ((int)bp->b_command) {
398: case HT_REWOFFL:
399: /* offline is on purpose; don't do anything special */
400: ds |= HTDS_MOL;
401: break;
402: case HT_SREV:
403: /* if backspace file hit bot, its not an error */
404: if (er == (HTER_NEF|HTER_FCE) && ds&HTDS_BOT &&
405: bp->b_repcnt == INF)
406: er &= ~HTER_NEF;
407: break;
408: }
409: er &= ~HTER_FCE;
410: if (er == 0)
411: ds &= ~HTDS_ERR;
412: }
413: if ((ds & (HTDS_ERR|HTDS_MOL)) != HTDS_MOL) {
414: if ((ds & HTDS_MOL) == 0 && sc->sc_openf > 0)
415: sc->sc_openf = -1;
416: tprintf(sc->sc_ttyp, "tu%d: hard error bn%d er=%b ds=%b\n",
417: TUUNIT(bp->b_dev), bp->b_blkno,
418: sc->sc_erreg, hter_bits, sc->sc_dsreg, htds_bits);
419: bp->b_flags |= B_ERROR;
420: return (MBN_DONE);
421: }
422: if (bp == &chtbuf[HTUNIT(bp->b_dev)]) {
423: if (sc->sc_flags & H_REWIND)
424: return (ds & HTDS_BOT ? MBN_DONE : MBN_RETRY);
425: bp->b_resid = -sc->sc_resid;
426: return (MBN_DONE);
427: }
428: if (ds & HTDS_TM)
429: if (sc->sc_blkno > bdbtofsb(bp->b_blkno)) {
430: sc->sc_nxrec = bdbtofsb(bp->b_blkno) - fc;
431: sc->sc_blkno = sc->sc_nxrec;
432: } else {
433: sc->sc_blkno = bdbtofsb(bp->b_blkno) + fc;
434: sc->sc_nxrec = sc->sc_blkno - 1;
435: }
436: else
437: sc->sc_blkno = bdbtofsb(bp->b_blkno);
438: return (MBN_RETRY);
439: }
440:
441: /*ARGSUSED*/
442: htioctl(dev, cmd, data, flag)
443: dev_t dev;
444: int cmd;
445: caddr_t data;
446: int flag;
447: {
448: register struct tu_softc *sc = &tu_softc[TUUNIT(dev)];
449: register struct buf *bp = &chtbuf[HTUNIT(dev)];
450: register callcount;
451: int fcount;
452: struct mtop *mtop;
453: struct mtget *mtget;
454: /* we depend of the values and order of the MT codes here */
455: static htops[] =
456: {HT_WEOF,HT_SFORW,HT_SREV,HT_SFORW,HT_SREV,HT_REW,HT_REWOFFL,HT_SENSE};
457:
458: switch (cmd) {
459:
460: case MTIOCTOP: /* tape operation */
461: mtop = (struct mtop *)data;
462: switch (mtop->mt_op) {
463:
464: case MTWEOF:
465: callcount = mtop->mt_count;
466: fcount = 1;
467: break;
468:
469: case MTFSF: case MTBSF:
470: callcount = mtop->mt_count;
471: fcount = INF;
472: break;
473:
474: case MTFSR: case MTBSR:
475: callcount = 1;
476: fcount = mtop->mt_count;
477: break;
478:
479: case MTREW: case MTOFFL:
480: callcount = 1;
481: fcount = 1;
482: break;
483:
484: default:
485: return (ENXIO);
486: }
487: if (callcount <= 0 || fcount <= 0)
488: return (EINVAL);
489: while (--callcount >= 0) {
490: htcommand(dev, htops[mtop->mt_op], fcount);
491: if ((mtop->mt_op == MTFSR || mtop->mt_op == MTBSR) &&
492: bp->b_resid)
493: return (EIO);
494: if ((bp->b_flags&B_ERROR) || sc->sc_dsreg&HTDS_BOT)
495: break;
496: }
497: return (geterror(bp));
498:
499: case MTIOCGET:
500: mtget = (struct mtget *)data;
501: mtget->mt_dsreg = sc->sc_dsreg;
502: mtget->mt_erreg = sc->sc_erreg;
503: mtget->mt_resid = sc->sc_resid;
504: mtget->mt_type = MT_ISHT;
505: break;
506:
507: default:
508: return (ENXIO);
509: }
510: return (0);
511: }
512:
513: #define DBSIZE 20
514:
515: htdump()
516: {
517: register struct mba_device *mi;
518: register struct mba_regs *mp;
519: register struct htdevice *htaddr;
520: int blk, num;
521: int start;
522:
523: start = 0;
524: num = maxfree;
525: #define phys(a,b) ((b)((int)(a)&0x7fffffff))
526: if (htinfo[0] == 0)
527: return (ENXIO);
528: mi = phys(htinfo[0], struct mba_device *);
529: mp = phys(mi->mi_hd, struct mba_hd *)->mh_physmba;
530: mp->mba_cr = MBCR_IE;
531: htaddr = (struct htdevice *)&mp->mba_drv[mi->mi_drive];
532: htaddr->httc = HTTC_PDP11|HTTC_1600BPI;
533: htaddr->htcs1 = HT_DCLR|HT_GO;
534: while (num > 0) {
535: blk = num > DBSIZE ? DBSIZE : num;
536: htdwrite(start, blk, htaddr, mp);
537: start += blk;
538: num -= blk;
539: }
540: hteof(htaddr);
541: hteof(htaddr);
542: htwait(htaddr);
543: if (htaddr->htds&HTDS_ERR)
544: return (EIO);
545: htaddr->htcs1 = HT_REW|HT_GO;
546: return (0);
547: }
548:
549: htdwrite(dbuf, num, htaddr, mp)
550: register dbuf, num;
551: register struct htdevice *htaddr;
552: struct mba_regs *mp;
553: {
554: register struct pte *io;
555: register int i;
556:
557: htwait(htaddr);
558: io = mp->mba_map;
559: for (i = 0; i < num; i++)
560: *(int *)io++ = dbuf++ | PG_V;
561: htaddr->htfc = -(num*NBPG);
562: mp->mba_sr = -1;
563: mp->mba_bcr = -(num*NBPG);
564: mp->mba_var = 0;
565: htaddr->htcs1 = HT_WCOM|HT_GO;
566: }
567:
568: htwait(htaddr)
569: struct htdevice *htaddr;
570: {
571: register s;
572:
573: do
574: s = htaddr->htds;
575: while ((s & HTDS_DRY) == 0);
576: }
577:
578: hteof(htaddr)
579: struct htdevice *htaddr;
580: {
581:
582: htwait(htaddr);
583: htaddr->htcs1 = HT_WEOF|HT_GO;
584: }
585: #endif
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