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1.1 root 1: /* ht.c 6.2 83/09/26 */
2:
3: #include "tu.h"
4: #if NHT > 0
5: /*
6: * TM03/TU?? tape driver
7: *
8: * TODO:
9: * cleanup messages on errors
10: * test ioctl's
11: * see how many rewind interrups we get if we kick when not at BOT
12: * fixup rle error on block tape code
13: */
14: #include "../machine/pte.h"
15:
16: #include "../h/param.h"
17: #include "../h/systm.h"
18: #include "../h/buf.h"
19: #include "../h/conf.h"
20: #include "../h/dir.h"
21: #include "../h/file.h"
22: #include "../h/user.h"
23: #include "../h/map.h"
24: #include "../h/ioctl.h"
25: #include "../h/mtio.h"
26: #include "../h/cmap.h"
27: #include "../h/uio.h"
28:
29: #include "../vax/cpu.h"
30: #include "../vaxmba/mbareg.h"
31: #include "../vaxmba/mbavar.h"
32: #include "../vaxmba/htreg.h"
33:
34: struct buf rhtbuf[NHT];
35: struct buf chtbuf[NHT];
36:
37: short httypes[] =
38: { MBDT_TM03, MBDT_TE16, MBDT_TU45, MBDT_TU77, 0 };
39: struct mba_device *htinfo[NHT];
40: int htattach(), htslave(), htustart(), htndtint(), htdtint();
41: struct mba_driver htdriver =
42: { htattach, htslave, htustart, 0, htdtint, htndtint,
43: httypes, "ht", "tu", htinfo };
44:
45: #define MASKREG(r) ((r) & 0xffff)
46:
47: /* bits in minor device */
48: #define TUUNIT(dev) (minor(dev)&03)
49: #define H_NOREWIND 04
50: #define H_1600BPI 08
51:
52: #define HTUNIT(dev) (tutoht[TUUNIT(dev)])
53:
54: #define INF (daddr_t)1000000L /* a block number that wont exist */
55:
56: struct tu_softc {
57: char sc_openf;
58: char sc_flags;
59: daddr_t sc_blkno;
60: daddr_t sc_nxrec;
61: u_short sc_erreg;
62: u_short sc_dsreg;
63: short sc_resid;
64: short sc_dens;
65: struct mba_device *sc_mi;
66: int sc_slave;
67: } tu_softc[NTU];
68: short tutoht[NTU];
69:
70: /*
71: * Bits for sc_flags.
72: */
73: #define H_WRITTEN 1 /* last operation was a write */
74: #define H_ERASED 2 /* last write retry was an erase gap */
75: #define H_REWIND 4 /* last unit start was a rewind */
76:
77: char hter_bits[] = HTER_BITS;
78: char htds_bits[] = HTDS_BITS;
79:
80: /*ARGSUSED*/
81: htattach(mi)
82: struct mba_device *mi;
83: {
84:
85: }
86:
87: htslave(mi, ms, sn)
88: struct mba_device *mi;
89: struct mba_slave *ms;
90: int sn;
91: {
92: register struct tu_softc *sc = &tu_softc[ms->ms_unit];
93: register struct htdevice *htaddr = (struct htdevice *)mi->mi_drv;
94:
95: htaddr->httc = sn;
96: if (htaddr->htdt & HTDT_SPR) {
97: sc->sc_mi = mi;
98: sc->sc_slave = sn;
99: tutoht[ms->ms_unit] = mi->mi_unit;
100: return (1);
101: } else
102: return (0);
103: }
104:
105: htopen(dev, flag)
106: dev_t dev;
107: int flag;
108: {
109: register int tuunit;
110: register struct mba_device *mi;
111: register struct tu_softc *sc;
112: int olddens, dens;
113:
114: tuunit = TUUNIT(dev);
115: if (tuunit >= NTU || (sc = &tu_softc[tuunit])->sc_openf ||
116: (mi = htinfo[HTUNIT(dev)]) == 0 || mi->mi_alive == 0)
117: return (ENXIO);
118: olddens = sc->sc_dens;
119: dens = sc->sc_dens =
120: ((minor(dev)&H_1600BPI)?HTTC_1600BPI:HTTC_800BPI)|
121: HTTC_PDP11|sc->sc_slave;
122: htcommand(dev, HT_SENSE, 1);
123: sc->sc_dens = olddens;
124: if ((sc->sc_dsreg & HTDS_MOL) == 0) {
125: uprintf("tu%d: not online\n", tuunit);
126: return (EIO);
127: }
128: if ((flag&FWRITE) && (sc->sc_dsreg&HTDS_WRL)) {
129: uprintf("tu%d: no write ring\n", tuunit);
130: return (EIO);
131: }
132: if ((sc->sc_dsreg & HTDS_BOT) == 0 && (flag&FWRITE) &&
133: dens != sc->sc_dens) {
134: uprintf("tu%d: can't change density in mid-tape\n", tuunit);
135: return (EIO);
136: }
137: sc->sc_openf = 1;
138: sc->sc_blkno = (daddr_t)0;
139: sc->sc_nxrec = INF;
140: sc->sc_flags = 0;
141: sc->sc_dens = dens;
142: return (0);
143: }
144:
145: htclose(dev, flag)
146: register dev_t dev;
147: register flag;
148: {
149: register struct tu_softc *sc = &tu_softc[TUUNIT(dev)];
150:
151: if (flag == FWRITE || ((flag&FWRITE) && (sc->sc_flags&H_WRITTEN))) {
152: htcommand(dev, HT_WEOF, 1);
153: htcommand(dev, HT_WEOF, 1);
154: htcommand(dev, HT_SREV, 1);
155: }
156: if ((minor(dev)&H_NOREWIND) == 0)
157: htcommand(dev, HT_REW, 0);
158: sc->sc_openf = 0;
159: }
160:
161: htcommand(dev, com, count)
162: dev_t dev;
163: int com, count;
164: {
165: register struct buf *bp;
166: register int s;
167:
168: bp = &chtbuf[HTUNIT(dev)];
169: s = spl5();
170: while (bp->b_flags&B_BUSY) {
171: if(bp->b_repcnt == 0 && (bp->b_flags&B_DONE))
172: break;
173: bp->b_flags |= B_WANTED;
174: sleep((caddr_t)bp, PRIBIO);
175: }
176: bp->b_flags = B_BUSY|B_READ;
177: splx(s);
178: bp->b_dev = dev;
179: bp->b_command = com;
180: bp->b_repcnt = count;
181: bp->b_blkno = 0;
182: htstrategy(bp);
183: if (count == 0)
184: return;
185: iowait(bp);
186: if (bp->b_flags&B_WANTED)
187: wakeup((caddr_t)bp);
188: bp->b_flags &= B_ERROR;
189: }
190:
191: htstrategy(bp)
192: register struct buf *bp;
193: {
194: register struct mba_device *mi = htinfo[HTUNIT(bp->b_dev)];
195: register struct buf *dp;
196: register int s;
197:
198: bp->av_forw = NULL;
199: dp = &mi->mi_tab;
200: s = spl5();
201: if (dp->b_actf == NULL)
202: dp->b_actf = bp;
203: else
204: dp->b_actl->av_forw = bp;
205: dp->b_actl = bp;
206: if (dp->b_active == 0)
207: mbustart(mi);
208: splx(s);
209: }
210:
211: htustart(mi)
212: register struct mba_device *mi;
213: {
214: register struct htdevice *htaddr =
215: (struct htdevice *)mi->mi_drv;
216: register struct buf *bp = mi->mi_tab.b_actf;
217: register struct tu_softc *sc = &tu_softc[TUUNIT(bp->b_dev)];
218: daddr_t blkno;
219:
220: htaddr->httc = sc->sc_dens;
221: #ifdef notdef
222: /* unneeded, may hang controller */
223: if (bp == &chtbuf[HTUNIT(bp->b_dev)] && bp->b_command == HT_SENSE) {
224: htaddr->htcs1 = HT_SENSE|HT_GO;
225: mbclrattn(mi);
226: }
227: #endif
228: sc->sc_dsreg = htaddr->htds;
229: sc->sc_erreg = htaddr->hter;
230: sc->sc_resid = htaddr->htfc;
231: sc->sc_flags &= ~(H_WRITTEN|H_REWIND);
232: if ((htaddr->htdt & HTDT_SPR) == 0 || (htaddr->htds & HTDS_MOL) == 0)
233: if (sc->sc_openf > 0)
234: sc->sc_openf = -1;
235: if (sc->sc_openf < 0) {
236: bp->b_flags |= B_ERROR;
237: return (MBU_NEXT);
238: }
239: if (bp != &chtbuf[HTUNIT(bp->b_dev)]) {
240: if (bdbtofsb(bp->b_blkno) > sc->sc_nxrec) {
241: bp->b_flags |= B_ERROR;
242: bp->b_error = ENXIO;
243: return (MBU_NEXT);
244: }
245: if (bdbtofsb(bp->b_blkno) == sc->sc_nxrec &&
246: bp->b_flags&B_READ) {
247: bp->b_resid = bp->b_bcount;
248: clrbuf(bp);
249: return (MBU_NEXT);
250: }
251: if ((bp->b_flags&B_READ)==0)
252: sc->sc_nxrec = bdbtofsb(bp->b_blkno) + 1;
253: } else {
254: if (bp->b_command == HT_SENSE)
255: return (MBU_NEXT);
256: if (bp->b_command == HT_REW)
257: sc->sc_flags |= H_REWIND;
258: else
259: htaddr->htfc = -bp->b_bcount;
260: htaddr->htcs1 = bp->b_command|HT_GO;
261: return (MBU_STARTED);
262: }
263: if ((blkno = sc->sc_blkno) == bdbtofsb(bp->b_blkno)) {
264: htaddr->htfc = -bp->b_bcount;
265: if ((bp->b_flags&B_READ) == 0) {
266: if (mi->mi_tab.b_errcnt) {
267: if ((sc->sc_flags & H_ERASED) == 0) {
268: sc->sc_flags |= H_ERASED;
269: htaddr->htcs1 = HT_ERASE | HT_GO;
270: return (MBU_STARTED);
271: }
272: sc->sc_flags &= ~H_ERASED;
273: }
274: if (htaddr->htds & HTDS_EOT) {
275: bp->b_resid = bp->b_bcount;
276: bp->b_flags |= B_ERROR;
277: return (MBU_NEXT);
278: }
279: }
280: return (MBU_DODATA);
281: }
282: if (blkno < bdbtofsb(bp->b_blkno)) {
283: htaddr->htfc = blkno - bdbtofsb(bp->b_blkno);
284: htaddr->htcs1 = HT_SFORW|HT_GO;
285: } else {
286: htaddr->htfc = bdbtofsb(bp->b_blkno) - blkno;
287: htaddr->htcs1 = HT_SREV|HT_GO;
288: }
289: return (MBU_STARTED);
290: }
291:
292: htdtint(mi, mbsr)
293: register struct mba_device *mi;
294: int mbsr;
295: {
296: register struct htdevice *htaddr = (struct htdevice *)mi->mi_drv;
297: register struct buf *bp = mi->mi_tab.b_actf;
298: register struct tu_softc *sc;
299: int ds, er, mbs;
300:
301: sc = &tu_softc[TUUNIT(bp->b_dev)];
302: ds = sc->sc_dsreg = MASKREG(htaddr->htds);
303: er = sc->sc_erreg = MASKREG(htaddr->hter);
304: sc->sc_resid = MASKREG(htaddr->htfc);
305: mbs = mbsr;
306: sc->sc_blkno++;
307: if((bp->b_flags & B_READ) == 0)
308: sc->sc_flags |= H_WRITTEN;
309: if ((ds&(HTDS_ERR|HTDS_MOL)) != HTDS_MOL || mbs & MBSR_EBITS) {
310: htaddr->htcs1 = HT_DCLR|HT_GO;
311: mbclrattn(mi);
312: if (bp == &rhtbuf[HTUNIT(bp->b_dev)]) {
313: er &= ~HTER_FCE;
314: mbs &= ~(MBSR_DTABT|MBSR_MBEXC);
315: }
316: if (bp->b_flags & B_READ && ds & HTDS_PES)
317: er &= ~(HTER_CSITM|HTER_CORCRC);
318: if (er&HTER_HARD || mbs&MBSR_EBITS || (ds&HTDS_MOL) == 0 ||
319: er && ++mi->mi_tab.b_errcnt >= 7) {
320: if ((ds & HTDS_MOL) == 0 && sc->sc_openf > 0)
321: sc->sc_openf = -1;
322: if ((er&HTER_HARD) == HTER_FCE &&
323: (mbs&MBSR_EBITS) == (MBSR_DTABT|MBSR_MBEXC) &&
324: (ds&HTDS_MOL))
325: goto noprint;
326: printf("tu%d: hard error bn%d mbsr=%b er=%b ds=%b\n",
327: TUUNIT(bp->b_dev), bp->b_blkno,
328: mbsr, mbsr_bits,
329: sc->sc_erreg, hter_bits,
330: sc->sc_dsreg, htds_bits);
331: noprint:
332: bp->b_flags |= B_ERROR;
333: return (MBD_DONE);
334: }
335: if (er)
336: return (MBD_RETRY);
337: }
338: bp->b_resid = 0;
339: if (bp->b_flags & B_READ)
340: if (ds&HTDS_TM) { /* must be a read, right? */
341: bp->b_resid = bp->b_bcount;
342: sc->sc_nxrec = bdbtofsb(bp->b_blkno);
343: } else if(bp->b_bcount > MASKREG(htaddr->htfc))
344: bp->b_resid = bp->b_bcount - MASKREG(htaddr->htfc);
345: return (MBD_DONE);
346: }
347:
348: htndtint(mi)
349: register struct mba_device *mi;
350: {
351: register struct htdevice *htaddr = (struct htdevice *)mi->mi_drv;
352: register struct buf *bp = mi->mi_tab.b_actf;
353: register struct tu_softc *sc;
354: int er, ds, fc;
355:
356: ds = MASKREG(htaddr->htds);
357: er = MASKREG(htaddr->hter);
358: fc = MASKREG(htaddr->htfc);
359: if (er) {
360: htaddr->htcs1 = HT_DCLR|HT_GO;
361: mbclrattn(mi);
362: }
363: if (bp == 0)
364: return (MBN_SKIP);
365: sc = &tu_softc[TUUNIT(bp->b_dev)];
366: sc->sc_dsreg = ds;
367: sc->sc_erreg = er;
368: sc->sc_resid = fc;
369: if (bp == &chtbuf[HTUNIT(bp->b_dev)]) {
370: switch (bp->b_command) {
371: case HT_REWOFFL:
372: /* offline is on purpose; don't do anything special */
373: ds |= HTDS_MOL;
374: break;
375: case HT_SREV:
376: /* if backspace file hit bot, its not an error */
377: if (er == (HTER_NEF|HTER_FCE) && ds&HTDS_BOT &&
378: bp->b_repcnt == INF)
379: er &= ~HTER_NEF;
380: break;
381: }
382: er &= ~HTER_FCE;
383: if (er == 0)
384: ds &= ~HTDS_ERR;
385: }
386: if ((ds & (HTDS_ERR|HTDS_MOL)) != HTDS_MOL) {
387: if ((ds & HTDS_MOL) == 0 && sc->sc_openf > 0)
388: sc->sc_openf = -1;
389: printf("tu%d: hard error bn%d er=%b ds=%b\n",
390: TUUNIT(bp->b_dev), bp->b_blkno,
391: sc->sc_erreg, hter_bits, sc->sc_dsreg, htds_bits);
392: bp->b_flags |= B_ERROR;
393: return (MBN_DONE);
394: }
395: if (bp == &chtbuf[HTUNIT(bp->b_dev)]) {
396: if (sc->sc_flags & H_REWIND)
397: return (ds & HTDS_BOT ? MBN_DONE : MBN_RETRY);
398: bp->b_resid = -sc->sc_resid;
399: return (MBN_DONE);
400: }
401: if (ds & HTDS_TM)
402: if (sc->sc_blkno > bdbtofsb(bp->b_blkno)) {
403: sc->sc_nxrec = bdbtofsb(bp->b_blkno) - fc;
404: sc->sc_blkno = sc->sc_nxrec;
405: } else {
406: sc->sc_blkno = bdbtofsb(bp->b_blkno) + fc;
407: sc->sc_nxrec = sc->sc_blkno - 1;
408: }
409: else
410: sc->sc_blkno = bdbtofsb(bp->b_blkno);
411: return (MBN_RETRY);
412: }
413:
414: htread(dev, uio)
415: dev_t dev;
416: struct uio *uio;
417: {
418: int errno;
419:
420: errno = htphys(dev, uio);
421: if (errno)
422: return (errno);
423: return (physio(htstrategy, &rhtbuf[HTUNIT(dev)], dev, B_READ, minphys, uio));
424: }
425:
426: htwrite(dev, uio)
427: dev_t dev;
428: struct uio *uio;
429: {
430: int errno;
431:
432: errno = htphys(dev, uio);
433: if (errno)
434: return (errno);
435: return (physio(htstrategy, &rhtbuf[HTUNIT(dev)], dev, B_WRITE, minphys, uio));
436: }
437:
438: htphys(dev, uio)
439: dev_t dev;
440: struct uio *uio;
441: {
442: register int htunit;
443: register struct tu_softc *sc;
444: register struct mba_device *mi;
445: daddr_t a;
446:
447: htunit = HTUNIT(dev);
448: if (htunit >= NHT || (mi = htinfo[htunit]) == 0 || mi->mi_alive == 0)
449: return (ENXIO);
450: a = uio->uio_offset >> 9;
451: sc = &tu_softc[TUUNIT(dev)];
452: sc->sc_blkno = bdbtofsb(a);
453: sc->sc_nxrec = bdbtofsb(a)+1;
454: return (0);
455: }
456:
457: /*ARGSUSED*/
458: htioctl(dev, cmd, data, flag)
459: dev_t dev;
460: int cmd;
461: caddr_t data;
462: int flag;
463: {
464: register struct tu_softc *sc = &tu_softc[TUUNIT(dev)];
465: register struct buf *bp = &chtbuf[HTUNIT(dev)];
466: register callcount;
467: int fcount;
468: struct mtop *mtop;
469: struct mtget *mtget;
470: /* we depend of the values and order of the MT codes here */
471: static htops[] =
472: {HT_WEOF,HT_SFORW,HT_SREV,HT_SFORW,HT_SREV,HT_REW,HT_REWOFFL,HT_SENSE};
473:
474: switch (cmd) {
475:
476: case MTIOCTOP: /* tape operation */
477: mtop = (struct mtop *)data;
478: switch (mtop->mt_op) {
479:
480: case MTWEOF:
481: callcount = mtop->mt_count;
482: fcount = 1;
483: break;
484:
485: case MTFSF: case MTBSF:
486: callcount = mtop->mt_count;
487: fcount = INF;
488: break;
489:
490: case MTFSR: case MTBSR:
491: callcount = 1;
492: fcount = mtop->mt_count;
493: break;
494:
495: case MTREW: case MTOFFL:
496: callcount = 1;
497: fcount = 1;
498: break;
499:
500: default:
501: return (ENXIO);
502: }
503: if (callcount <= 0 || fcount <= 0)
504: return (EINVAL);
505: while (--callcount >= 0) {
506: htcommand(dev, htops[mtop->mt_op], fcount);
507: if ((mtop->mt_op == MTFSR || mtop->mt_op == MTBSR) &&
508: bp->b_resid)
509: return (EIO);
510: if ((bp->b_flags&B_ERROR) || sc->sc_dsreg&HTDS_BOT)
511: break;
512: }
513: return (geterror(bp));
514:
515: case MTIOCGET:
516: mtget = (struct mtget *)data;
517: mtget->mt_dsreg = sc->sc_dsreg;
518: mtget->mt_erreg = sc->sc_erreg;
519: mtget->mt_resid = sc->sc_resid;
520: mtget->mt_type = MT_ISHT;
521: break;
522:
523: default:
524: return (ENXIO);
525: }
526: return (0);
527: }
528:
529: #define DBSIZE 20
530:
531: htdump()
532: {
533: register struct mba_device *mi;
534: register struct mba_regs *mp;
535: register struct htdevice *htaddr;
536: int blk, num;
537: int start;
538:
539: start = 0;
540: num = maxfree;
541: #define phys(a,b) ((b)((int)(a)&0x7fffffff))
542: if (htinfo[0] == 0)
543: return (ENXIO);
544: mi = phys(htinfo[0], struct mba_device *);
545: mp = phys(mi->mi_hd, struct mba_hd *)->mh_physmba;
546: mp->mba_cr = MBCR_IE;
547: htaddr = (struct htdevice *)&mp->mba_drv[mi->mi_drive];
548: htaddr->httc = HTTC_PDP11|HTTC_1600BPI;
549: htaddr->htcs1 = HT_DCLR|HT_GO;
550: while (num > 0) {
551: blk = num > DBSIZE ? DBSIZE : num;
552: htdwrite(start, blk, htaddr, mp);
553: start += blk;
554: num -= blk;
555: }
556: hteof(htaddr);
557: hteof(htaddr);
558: htwait(htaddr);
559: if (htaddr->htds&HTDS_ERR)
560: return (EIO);
561: htaddr->htcs1 = HT_REW|HT_GO;
562: return (0);
563: }
564:
565: htdwrite(dbuf, num, htaddr, mp)
566: register dbuf, num;
567: register struct htdevice *htaddr;
568: struct mba_regs *mp;
569: {
570: register struct pte *io;
571: register int i;
572:
573: htwait(htaddr);
574: io = mp->mba_map;
575: for (i = 0; i < num; i++)
576: *(int *)io++ = dbuf++ | PG_V;
577: htaddr->htfc = -(num*NBPG);
578: mp->mba_sr = -1;
579: mp->mba_bcr = -(num*NBPG);
580: mp->mba_var = 0;
581: htaddr->htcs1 = HT_WCOM|HT_GO;
582: }
583:
584: htwait(htaddr)
585: struct htdevice *htaddr;
586: {
587: register s;
588:
589: do
590: s = htaddr->htds;
591: while ((s & HTDS_DRY) == 0);
592: }
593:
594: hteof(htaddr)
595: struct htdevice *htaddr;
596: {
597:
598: htwait(htaddr);
599: htaddr->htcs1 = HT_WEOF|HT_GO;
600: }
601: #endif
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