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1.1 root 1: /* ht.c 4.20 81/10/27 */
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 "../h/param.h"
15: #include "../h/systm.h"
16: #include "../h/buf.h"
17: #include "../h/conf.h"
18: #include "../h/dir.h"
19: #include "../h/file.h"
20: #include "../h/user.h"
21: #include "../h/map.h"
22: #include "../h/pte.h"
23: #include "../h/mbareg.h"
24: #include "../h/mbavar.h"
25: #include "../h/mtio.h"
26: #include "../h/ioctl.h"
27: #include "../h/cmap.h"
28: #include "../h/cpu.h"
29:
30: #include "../h/htreg.h"
31:
32: struct buf rhtbuf[NHT];
33: struct buf chtbuf[NHT];
34:
35: short httypes[] =
36: { MBDT_TM03, MBDT_TE16, MBDT_TU45, MBDT_TU77, 0 };
37: struct mba_device *htinfo[NHT];
38: int htattach(), htslave(), htustart(), htndtint(), htdtint();
39: struct mba_driver htdriver =
40: { htattach, htslave, htustart, 0, htdtint, htndtint,
41: httypes, "ht", "tu", htinfo };
42:
43: #define MASKREG(r) ((r) & 0xffff)
44:
45: /* bits in minor device */
46: #define TUUNIT(dev) (minor(dev)&03)
47: #define H_NOREWIND 04
48: #define H_1600BPI 08
49:
50: #define HTUNIT(dev) (tutoht[TUUNIT(dev)])
51:
52: #define INF (daddr_t)1000000L /* a block number that wont exist */
53:
54: struct tu_softc {
55: char sc_openf;
56: char sc_flags;
57: daddr_t sc_blkno;
58: daddr_t sc_nxrec;
59: u_short sc_erreg;
60: u_short sc_dsreg;
61: short sc_resid;
62: short sc_dens;
63: struct mba_device *sc_mi;
64: int sc_slave;
65: } tu_softc[NTU];
66: short tutoht[NTU];
67:
68: /*
69: * Bits for sc_flags.
70: */
71: #define H_WRITTEN 1 /* last operation was a write */
72: #define H_ERASED 2 /* last write retry was an erase gap */
73: #define H_REWIND 4 /* last unit start was a rewind */
74:
75: char hter_bits[] = HTER_BITS;
76: char htds_bits[] = HTDS_BITS;
77:
78: /*ARGSUSED*/
79: htattach(mi)
80: struct mba_device *mi;
81: {
82:
83: }
84:
85: htslave(mi, ms)
86: struct mba_device *mi;
87: struct mba_slave *ms;
88: {
89: register struct tu_softc *sc = &tu_softc[ms->ms_unit];
90: register struct htdevice *htaddr = (struct htdevice *)mi->mi_drv;
91:
92: htaddr->httc = ms->ms_slave;
93: if (htaddr->htdt & HTDT_SPR) {
94: sc->sc_mi = mi;
95: sc->sc_slave = ms->ms_slave;
96: tutoht[ms->ms_unit] = mi->mi_unit;
97: return (1);
98: } else
99: return (0);
100: }
101:
102: htopen(dev, flag)
103: dev_t dev;
104: int flag;
105: {
106: register int tuunit;
107: register struct mba_device *mi;
108: register struct tu_softc *sc;
109: int olddens, dens;
110:
111: tuunit = TUUNIT(dev);
112: if (tuunit >= NTU || (sc = &tu_softc[tuunit])->sc_openf ||
113: (mi = htinfo[HTUNIT(dev)]) == 0 || mi->mi_alive == 0) {
114: u.u_error = ENXIO;
115: return;
116: }
117: olddens = sc->sc_dens;
118: dens = sc->sc_dens =
119: ((minor(dev)&H_1600BPI)?HTTC_1600BPI:HTTC_800BPI)|
120: HTTC_PDP11|sc->sc_slave;
121: htcommand(dev, HT_SENSE, 1);
122: sc->sc_dens = olddens;
123: if ((sc->sc_dsreg & HTDS_MOL) == 0) {
124: uprintf("tu%d: not online\n", tuunit);
125: u.u_error = EIO;
126: return;
127: }
128: if ((flag&FWRITE) && (sc->sc_dsreg&HTDS_WRL)) {
129: uprintf("tu%d: no write ring\n", tuunit);
130: u.u_error = EIO;
131: return;
132: }
133: if ((sc->sc_dsreg & HTDS_BOT) == 0 && (flag&FWRITE) &&
134: dens != sc->sc_dens) {
135: uprintf("tu%d: can't change density in mid-tape\n", tuunit);
136: u.u_error = EIO;
137: return;
138: }
139: sc->sc_openf = 1;
140: sc->sc_blkno = (daddr_t)0;
141: sc->sc_nxrec = INF;
142: sc->sc_flags = 0;
143: sc->sc_dens = dens;
144: }
145:
146: htclose(dev, flag)
147: register dev_t dev;
148: register flag;
149: {
150: register struct tu_softc *sc = &tu_softc[TUUNIT(dev)];
151:
152: if (flag == FWRITE || ((flag&FWRITE) && (sc->sc_flags&H_WRITTEN))) {
153: htcommand(dev, HT_WEOF, 1);
154: htcommand(dev, HT_WEOF, 1);
155: htcommand(dev, HT_SREV, 1);
156: }
157: if ((minor(dev)&H_NOREWIND) == 0)
158: htcommand(dev, HT_REW, 0);
159: sc->sc_openf = 0;
160: }
161:
162: htcommand(dev, com, count)
163: dev_t dev;
164: int com, count;
165: {
166: register struct buf *bp;
167:
168: bp = &chtbuf[HTUNIT(dev)];
169: (void) 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: (void) spl0();
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:
197: bp->av_forw = NULL;
198: dp = &mi->mi_tab;
199: (void) spl5();
200: if (dp->b_actf == NULL)
201: dp->b_actf = bp;
202: else
203: dp->b_actl->av_forw = bp;
204: dp->b_actl = bp;
205: if (dp->b_active == 0)
206: mbustart(mi);
207: (void) spl0();
208: }
209:
210: htustart(mi)
211: register struct mba_device *mi;
212: {
213: register struct htdevice *htaddr =
214: (struct htdevice *)mi->mi_drv;
215: register struct buf *bp = mi->mi_tab.b_actf;
216: register struct tu_softc *sc = &tu_softc[TUUNIT(bp->b_dev)];
217: daddr_t blkno;
218:
219: htaddr->httc = sc->sc_dens;
220: if (bp == &chtbuf[HTUNIT(bp->b_dev)] && bp->b_command == HT_SENSE) {
221: htaddr->htcs1 = HT_SENSE|HT_GO;
222: mbclrattn(mi);
223: }
224: sc->sc_dsreg = htaddr->htds;
225: sc->sc_erreg = htaddr->hter;
226: sc->sc_resid = htaddr->htfc;
227: sc->sc_flags &= ~(H_WRITTEN|H_REWIND);
228: if ((htaddr->htdt & HTDT_SPR) == 0 || (htaddr->htds & HTDS_MOL) == 0)
229: if (sc->sc_openf > 0)
230: sc->sc_openf = -1;
231: if (sc->sc_openf < 0) {
232: bp->b_flags |= B_ERROR;
233: return (MBU_NEXT);
234: }
235: if (bp != &chtbuf[HTUNIT(bp->b_dev)]) {
236: if (dbtofsb(bp->b_blkno) > sc->sc_nxrec) {
237: bp->b_flags |= B_ERROR;
238: bp->b_error = ENXIO;
239: return (MBU_NEXT);
240: }
241: if (dbtofsb(bp->b_blkno) == sc->sc_nxrec &&
242: bp->b_flags&B_READ) {
243: bp->b_resid = bp->b_bcount;
244: clrbuf(bp);
245: return (MBU_NEXT);
246: }
247: if ((bp->b_flags&B_READ)==0)
248: sc->sc_nxrec = dbtofsb(bp->b_blkno) + 1;
249: } else {
250: if (bp->b_command == HT_SENSE)
251: return (MBU_NEXT);
252: if (bp->b_command == HT_REW)
253: sc->sc_flags |= H_REWIND;
254: else
255: htaddr->htfc = -bp->b_bcount;
256: htaddr->htcs1 = bp->b_command|HT_GO;
257: return (MBU_STARTED);
258: }
259: if ((blkno = sc->sc_blkno) == dbtofsb(bp->b_blkno)) {
260: htaddr->htfc = -bp->b_bcount;
261: if ((bp->b_flags&B_READ) == 0) {
262: if (mi->mi_tab.b_errcnt) {
263: if ((sc->sc_flags & H_ERASED) == 0) {
264: sc->sc_flags |= H_ERASED;
265: htaddr->htcs1 = HT_ERASE | HT_GO;
266: return (MBU_STARTED);
267: }
268: sc->sc_flags &= ~H_ERASED;
269: }
270: if (htaddr->htds & HTDS_EOT) {
271: bp->b_resid = bp->b_bcount;
272: return (MBU_NEXT);
273: }
274: }
275: return (MBU_DODATA);
276: }
277: if (blkno < dbtofsb(bp->b_blkno)) {
278: htaddr->htfc = blkno - dbtofsb(bp->b_blkno);
279: htaddr->htcs1 = HT_SFORW|HT_GO;
280: } else {
281: htaddr->htfc = dbtofsb(bp->b_blkno) - blkno;
282: htaddr->htcs1 = HT_SREV|HT_GO;
283: }
284: return (MBU_STARTED);
285: }
286:
287: htdtint(mi, mbsr)
288: register struct mba_device *mi;
289: int mbsr;
290: {
291: register struct htdevice *htaddr = (struct htdevice *)mi->mi_drv;
292: register struct buf *bp = mi->mi_tab.b_actf;
293: register struct tu_softc *sc;
294: int ds, er, mbs;
295:
296: sc = &tu_softc[TUUNIT(bp->b_dev)];
297: ds = sc->sc_dsreg = MASKREG(htaddr->htds);
298: er = sc->sc_erreg = MASKREG(htaddr->hter);
299: sc->sc_resid = MASKREG(htaddr->htfc);
300: mbs = mbsr;
301: sc->sc_blkno++;
302: if((bp->b_flags & B_READ) == 0)
303: sc->sc_flags |= H_WRITTEN;
304: if ((ds&(HTDS_ERR|HTDS_MOL)) != HTDS_MOL || mbs & MBSR_EBITS) {
305: htaddr->htcs1 = HT_DCLR|HT_GO;
306: mbclrattn(mi);
307: if (bp == &rhtbuf[HTUNIT(bp->b_dev)]) {
308: er &= ~HTER_FCE;
309: mbs &= ~(MBSR_DTABT|MBSR_MBEXC);
310: }
311: if (bp->b_flags & B_READ && ds & HTDS_PES)
312: er &= ~(HTER_CSITM|HTER_CORCRC);
313: if (er&HTER_HARD || mbs&MBSR_EBITS || (ds&HTDS_MOL) == 0 ||
314: er && ++mi->mi_tab.b_errcnt >= 7) {
315: if ((ds & HTDS_MOL) == 0 && sc->sc_openf > 0)
316: sc->sc_openf = -1;
317: if ((er&HTER_HARD) == HTER_FCE &&
318: (mbs&MBSR_EBITS) == (MBSR_DTABT|MBSR_MBEXC) &&
319: (ds&HTDS_MOL))
320: goto noprint;
321: printf("tu%d: hard error bn%d mbsr=%b er=%b ds=%b\n",
322: TUUNIT(bp->b_dev), bp->b_blkno,
323: mbsr, mbsr_bits,
324: sc->sc_erreg, hter_bits,
325: sc->sc_dsreg, htds_bits);
326: noprint:
327: bp->b_flags |= B_ERROR;
328: return (MBD_DONE);
329: }
330: if (er)
331: return (MBD_RETRY);
332: }
333: bp->b_resid = 0;
334: if (bp->b_flags & B_READ)
335: if (ds&HTDS_TM) { /* must be a read, right? */
336: bp->b_resid = bp->b_bcount;
337: sc->sc_nxrec = dbtofsb(bp->b_blkno);
338: } else if(bp->b_bcount > MASKREG(htaddr->htfc))
339: bp->b_resid = bp->b_bcount - MASKREG(htaddr->htfc);
340: return (MBD_DONE);
341: }
342:
343: htndtint(mi)
344: register struct mba_device *mi;
345: {
346: register struct htdevice *htaddr = (struct htdevice *)mi->mi_drv;
347: register struct buf *bp = mi->mi_tab.b_actf;
348: register struct tu_softc *sc;
349: int er, ds, fc;
350:
351: ds = MASKREG(htaddr->htds);
352: er = MASKREG(htaddr->hter);
353: fc = MASKREG(htaddr->htfc);
354: if (er) {
355: htaddr->htcs1 = HT_DCLR|HT_GO;
356: mbclrattn(mi);
357: }
358: if (bp == 0)
359: return (MBN_SKIP);
360: sc = &tu_softc[TUUNIT(bp->b_dev)];
361: sc->sc_dsreg = ds;
362: sc->sc_erreg = er;
363: sc->sc_resid = fc;
364: if (bp == &chtbuf[HTUNIT(bp->b_dev)]) {
365: switch (bp->b_command) {
366: case HT_REWOFFL:
367: /* offline is on purpose; don't do anything special */
368: ds |= HTDS_MOL;
369: break;
370: case HT_SREV:
371: /* if backspace file hit bot, its not an error */
372: if (er == (HTER_NEF|HTER_FCE) && ds&HTDS_BOT &&
373: bp->b_repcnt == INF)
374: er &= ~HTER_NEF;
375: break;
376: }
377: er &= ~HTER_FCE;
378: if (er == 0)
379: ds &= ~HTDS_ERR;
380: }
381: if ((ds & (HTDS_ERR|HTDS_MOL)) != HTDS_MOL) {
382: if ((ds & HTDS_MOL) == 0 && sc->sc_openf > 0)
383: sc->sc_openf = -1;
384: printf("tu%d: hard error bn%d er=%b ds=%b\n",
385: TUUNIT(bp->b_dev), bp->b_blkno,
386: sc->sc_erreg, hter_bits, sc->sc_dsreg, htds_bits);
387: bp->b_flags |= B_ERROR;
388: return (MBN_DONE);
389: }
390: if (bp == &chtbuf[HTUNIT(bp->b_dev)]) {
391: if (sc->sc_flags & H_REWIND)
392: return (ds & HTDS_BOT ? MBN_DONE : MBN_RETRY);
393: bp->b_resid = -sc->sc_resid;
394: return (MBN_DONE);
395: }
396: if (ds & HTDS_TM)
397: if (sc->sc_blkno > dbtofsb(bp->b_blkno)) {
398: sc->sc_nxrec = dbtofsb(bp->b_blkno) - fc;
399: sc->sc_blkno = sc->sc_nxrec;
400: } else {
401: sc->sc_blkno = dbtofsb(bp->b_blkno) + fc;
402: sc->sc_nxrec = sc->sc_blkno - 1;
403: }
404: else
405: sc->sc_blkno = dbtofsb(bp->b_blkno);
406: return (MBN_RETRY);
407: }
408:
409: htread(dev)
410: dev_t dev;
411: {
412:
413: htphys(dev);
414: if (u.u_error)
415: return;
416: physio(htstrategy, &rhtbuf[HTUNIT(dev)], dev, B_READ, minphys);
417: }
418:
419: htwrite(dev)
420: {
421:
422: htphys(dev);
423: if (u.u_error)
424: return;
425: physio(htstrategy, &rhtbuf[HTUNIT(dev)], dev, B_WRITE, minphys);
426: }
427:
428: htphys(dev)
429: dev_t dev;
430: {
431: register int htunit;
432: register struct tu_softc *sc;
433: register struct mba_device *mi;
434: daddr_t a;
435:
436: htunit = HTUNIT(dev);
437: if (htunit >= NHT || (mi = htinfo[htunit]) == 0 || mi->mi_alive == 0) {
438: u.u_error = ENXIO;
439: return;
440: }
441: a = u.u_offset >> 9;
442: sc = &tu_softc[TUUNIT(dev)];
443: sc->sc_blkno = dbtofsb(a);
444: sc->sc_nxrec = dbtofsb(a)+1;
445: }
446:
447: /*ARGSUSED*/
448: htioctl(dev, cmd, addr, flag)
449: dev_t dev;
450: int cmd;
451: caddr_t addr;
452: int flag;
453: {
454: register struct tu_softc *sc = &tu_softc[TUUNIT(dev)];
455: register struct buf *bp = &chtbuf[HTUNIT(dev)];
456: register callcount;
457: int fcount;
458: struct mtop mtop;
459: struct mtget mtget;
460: /* we depend of the values and order of the MT codes here */
461: static htops[] =
462: {HT_WEOF,HT_SFORW,HT_SREV,HT_SFORW,HT_SREV,HT_REW,HT_REWOFFL,HT_SENSE};
463:
464: switch (cmd) {
465: case MTIOCTOP: /* tape operation */
466: if (copyin((caddr_t)addr, (caddr_t)&mtop, sizeof(mtop))) {
467: u.u_error = EFAULT;
468: return;
469: }
470: switch(mtop.mt_op) {
471: case MTWEOF:
472: callcount = mtop.mt_count;
473: fcount = 1;
474: break;
475: case MTFSF: case MTBSF:
476: callcount = mtop.mt_count;
477: fcount = INF;
478: break;
479: case MTFSR: case MTBSR:
480: callcount = 1;
481: fcount = mtop.mt_count;
482: break;
483: case MTREW: case MTOFFL:
484: callcount = 1;
485: fcount = 1;
486: break;
487: default:
488: u.u_error = ENXIO;
489: return;
490: }
491: if (callcount <= 0 || fcount <= 0) {
492: u.u_error = ENXIO;
493: return;
494: }
495: while (--callcount >= 0) {
496: htcommand(dev, htops[mtop.mt_op], fcount);
497: if ((mtop.mt_op == MTFSR || mtop.mt_op == MTBSR) &&
498: bp->b_resid) {
499: u.u_error = EIO;
500: break;
501: }
502: if ((bp->b_flags&B_ERROR) || sc->sc_dsreg&HTDS_BOT)
503: break;
504: }
505: geterror(bp);
506: return;
507: case MTIOCGET:
508: mtget.mt_dsreg = sc->sc_dsreg;
509: mtget.mt_erreg = sc->sc_erreg;
510: mtget.mt_resid = sc->sc_resid;
511: mtget.mt_type = MT_ISHT;
512: if (copyout((caddr_t)&mtget, addr, sizeof(mtget)))
513: u.u_error = EFAULT;
514: return;
515: default:
516: u.u_error = ENXIO;
517: }
518: }
519:
520: #define DBSIZE 20
521:
522: htdump()
523: {
524: register struct mba_device *mi;
525: register struct mba_regs *mp;
526: register struct htdevice *htaddr;
527: int blk, num;
528: int start;
529:
530: start = 0;
531: num = maxfree;
532: #define phys(a,b) ((b)((int)(a)&0x7fffffff))
533: if (htinfo[0] == 0)
534: return (ENXIO);
535: mi = phys(htinfo[0], struct mba_device *);
536: mp = phys(mi->mi_hd, struct mba_hd *)->mh_physmba;
537: mp->mba_cr = MBCR_IE;
538: htaddr = (struct htdevice *)&mp->mba_drv[mi->mi_drive];
539: htaddr->httc = HTTC_PDP11|HTTC_1600BPI;
540: htaddr->htcs1 = HT_DCLR|HT_GO;
541: while (num > 0) {
542: blk = num > DBSIZE ? DBSIZE : num;
543: htdwrite(start, blk, htaddr, mp);
544: start += blk;
545: num -= blk;
546: }
547: hteof(htaddr);
548: hteof(htaddr);
549: htwait(htaddr);
550: if (htaddr->htds&HTDS_ERR)
551: return (EIO);
552: htaddr->htcs1 = HT_REW|HT_GO;
553: return (0);
554: }
555:
556: htdwrite(dbuf, num, htaddr, mp)
557: register dbuf, num;
558: register struct htdevice *htaddr;
559: struct mba_regs *mp;
560: {
561: register struct pte *io;
562: register int i;
563:
564: htwait(htaddr);
565: io = mp->mba_map;
566: for (i = 0; i < num; i++)
567: *(int *)io++ = dbuf++ | PG_V;
568: htaddr->htfc = -(num*NBPG);
569: mp->mba_sr = -1;
570: mp->mba_bcr = -(num*NBPG);
571: mp->mba_var = 0;
572: htaddr->htcs1 = HT_WCOM|HT_GO;
573: }
574:
575: htwait(htaddr)
576: struct htdevice *htaddr;
577: {
578: register s;
579:
580: do
581: s = htaddr->htds;
582: while ((s & HTDS_DRY) == 0);
583: }
584:
585: hteof(htaddr)
586: struct htdevice *htaddr;
587: {
588:
589: htwait(htaddr);
590: htaddr->htcs1 = HT_WEOF|HT_GO;
591: }
592: #endif
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