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1.1 root 1: /* ht.c 4.18+ 81/11/02 */
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:
91: sc->sc_mi = mi;
92: sc->sc_slave = ms->ms_slave;
93: tutoht[ms->ms_unit] = mi->mi_unit;
94: }
95:
96: htopen(dev, flag)
97: dev_t dev;
98: int flag;
99: {
100: register int tuunit;
101: register struct mba_device *mi;
102: register struct tu_softc *sc;
103: int olddens, dens;
104:
105: tuunit = TUUNIT(dev);
106: if (tuunit >= NTU || (sc = &tu_softc[tuunit])->sc_openf ||
107: (mi = htinfo[HTUNIT(dev)]) == 0 || mi->mi_alive == 0) {
108: u.u_error = ENXIO;
109: return;
110: }
111: olddens = sc->sc_dens;
112: dens = sc->sc_dens =
113: ((minor(dev)&H_1600BPI)?HTTC_1600BPI:HTTC_800BPI)|
114: HTTC_PDP11|sc->sc_slave;
115: htcommand(dev, HT_SENSE, 1);
116: sc->sc_dens = olddens;
117: if ((sc->sc_dsreg & HTDS_MOL) == 0) {
118: uprintf("tu%d: not online\n", tuunit);
119: u.u_error = EIO;
120: return;
121: }
122: if ((flag&FWRITE) && (sc->sc_dsreg&HTDS_WRL)) {
123: uprintf("tu%d: no write ring\n", tuunit);
124: u.u_error = EIO;
125: return;
126: }
127: if ((sc->sc_dsreg & HTDS_BOT) == 0 && (flag&FWRITE) &&
128: dens != sc->sc_dens) {
129: uprintf("tu%d: can't change density in mid-tape\n", tuunit);
130: u.u_error = EIO;
131: return;
132: }
133: sc->sc_openf = 1;
134: sc->sc_blkno = (daddr_t)0;
135: sc->sc_nxrec = INF;
136: sc->sc_flags = 0;
137: sc->sc_dens = dens;
138: }
139:
140: htclose(dev, flag)
141: register dev_t dev;
142: register flag;
143: {
144: register struct tu_softc *sc = &tu_softc[TUUNIT(dev)];
145:
146: if (flag == FWRITE || ((flag&FWRITE) && (sc->sc_flags&H_WRITTEN))) {
147: htcommand(dev, HT_WEOF, 1);
148: htcommand(dev, HT_WEOF, 1);
149: htcommand(dev, HT_SREV, 1);
150: }
151: if ((minor(dev)&H_NOREWIND) == 0)
152: htcommand(dev, HT_REW, 0);
153: sc->sc_openf = 0;
154: }
155:
156: htcommand(dev, com, count)
157: dev_t dev;
158: int com, count;
159: {
160: register struct buf *bp;
161:
162: bp = &chtbuf[HTUNIT(dev)];
163: (void) spl5();
164: while (bp->b_flags&B_BUSY) {
165: if(bp->b_repcnt == 0 && (bp->b_flags&B_DONE))
166: break;
167: bp->b_flags |= B_WANTED;
168: sleep((caddr_t)bp, PRIBIO);
169: }
170: bp->b_flags = B_BUSY|B_READ;
171: (void) spl0();
172: bp->b_dev = dev;
173: bp->b_command = com;
174: bp->b_repcnt = count;
175: bp->b_blkno = 0;
176: htstrategy(bp);
177: if (count == 0)
178: return;
179: iowait(bp);
180: if (bp->b_flags&B_WANTED)
181: wakeup((caddr_t)bp);
182: bp->b_flags &= B_ERROR;
183: }
184:
185: htstrategy(bp)
186: register struct buf *bp;
187: {
188: register struct mba_device *mi = htinfo[HTUNIT(bp->b_dev)];
189: register struct buf *dp;
190:
191: bp->av_forw = NULL;
192: dp = &mi->mi_tab;
193: (void) spl5();
194: if (dp->b_actf == NULL)
195: dp->b_actf = bp;
196: else
197: dp->b_actl->av_forw = bp;
198: dp->b_actl = bp;
199: if (dp->b_active == 0)
200: mbustart(mi);
201: (void) spl0();
202: }
203:
204: htustart(mi)
205: register struct mba_device *mi;
206: {
207: register struct htdevice *htaddr =
208: (struct htdevice *)mi->mi_drv;
209: register struct buf *bp = mi->mi_tab.b_actf;
210: register struct tu_softc *sc = &tu_softc[TUUNIT(bp->b_dev)];
211: daddr_t blkno;
212:
213: htaddr->httc = sc->sc_dens;
214: if (bp == &chtbuf[HTUNIT(bp->b_dev)] && bp->b_command == HT_SENSE) {
215: htaddr->htcs1 = HT_SENSE|HT_GO;
216: mbclrattn(mi);
217: }
218: sc->sc_dsreg = htaddr->htds;
219: sc->sc_erreg = htaddr->hter;
220: sc->sc_resid = htaddr->htfc;
221: sc->sc_flags &= ~(H_WRITTEN|H_REWIND);
222: if ((htaddr->htdt & HTDT_SPR) == 0 || (htaddr->htds & HTDS_MOL) == 0)
223: if (sc->sc_openf > 0)
224: sc->sc_openf = -1;
225: if (sc->sc_openf < 0) {
226: bp->b_flags |= B_ERROR;
227: return (MBU_NEXT);
228: }
229: if (bp != &chtbuf[HTUNIT(bp->b_dev)]) {
230: if (dbtofsb(0, bp->b_blkno) > sc->sc_nxrec) {
231: bp->b_flags |= B_ERROR;
232: bp->b_error = ENXIO;
233: return (MBU_NEXT);
234: }
235: if (dbtofsb(0, bp->b_blkno) == sc->sc_nxrec &&
236: bp->b_flags&B_READ) {
237: bp->b_resid = bp->b_bcount;
238: clrbuf(bp);
239: return (MBU_NEXT);
240: }
241: if ((bp->b_flags&B_READ)==0)
242: sc->sc_nxrec = dbtofsb(0, bp->b_blkno) + 1;
243: } else {
244: if (bp->b_command == HT_SENSE)
245: return (MBU_NEXT);
246: if (bp->b_command == HT_REW)
247: sc->sc_flags |= H_REWIND;
248: else
249: htaddr->htfc = -bp->b_bcount;
250: htaddr->htcs1 = bp->b_command|HT_GO;
251: return (MBU_STARTED);
252: }
253: if ((blkno = sc->sc_blkno) == dbtofsb(0, bp->b_blkno)) {
254: htaddr->htfc = -bp->b_bcount;
255: if ((bp->b_flags&B_READ) == 0) {
256: if (mi->mi_tab.b_errcnt) {
257: if ((sc->sc_flags & H_ERASED) == 0) {
258: sc->sc_flags |= H_ERASED;
259: htaddr->htcs1 = HT_ERASE | HT_GO;
260: return (MBU_STARTED);
261: }
262: sc->sc_flags &= ~H_ERASED;
263: }
264: if (htaddr->htds & HTDS_EOT) {
265: bp->b_resid = bp->b_bcount;
266: return (MBU_NEXT);
267: }
268: }
269: return (MBU_DODATA);
270: }
271: if (blkno < dbtofsb(0, bp->b_blkno)) {
272: htaddr->htfc = blkno - dbtofsb(0, bp->b_blkno);
273: htaddr->htcs1 = HT_SFORW|HT_GO;
274: } else {
275: htaddr->htfc = dbtofsb(0, bp->b_blkno) - blkno;
276: htaddr->htcs1 = HT_SREV|HT_GO;
277: }
278: return (MBU_STARTED);
279: }
280:
281: htdtint(mi, mbsr)
282: register struct mba_device *mi;
283: int mbsr;
284: {
285: register struct htdevice *htaddr = (struct htdevice *)mi->mi_drv;
286: register struct buf *bp = mi->mi_tab.b_actf;
287: register struct tu_softc *sc;
288: int ds, er, mbs;
289:
290: sc = &tu_softc[TUUNIT(bp->b_dev)];
291: ds = sc->sc_dsreg = MASKREG(htaddr->htds);
292: er = sc->sc_erreg = MASKREG(htaddr->hter);
293: sc->sc_resid = MASKREG(htaddr->htfc);
294: mbs = mbsr;
295: sc->sc_blkno++;
296: if((bp->b_flags & B_READ) == 0)
297: sc->sc_flags |= H_WRITTEN;
298: if ((ds&(HTDS_ERR|HTDS_MOL)) != HTDS_MOL || mbs & MBSR_EBITS) {
299: htaddr->htcs1 = HT_DCLR|HT_GO;
300: mbclrattn(mi);
301: if (bp == &rhtbuf[HTUNIT(bp->b_dev)]) {
302: er &= ~HTER_FCE;
303: mbs &= ~(MBSR_DTABT|MBSR_MBEXC);
304: }
305: if (bp->b_flags & B_READ && ds & HTDS_PES)
306: er &= ~(HTER_CSITM|HTER_CORCRC);
307: if (er&HTER_HARD || mbs&MBSR_EBITS || (ds&HTDS_MOL) == 0 ||
308: er && ++mi->mi_tab.b_errcnt >= 7) {
309: if ((ds & HTDS_MOL) == 0 && sc->sc_openf > 0)
310: sc->sc_openf = -1;
311: if ((er&HTER_HARD) == HTER_FCE &&
312: (mbs&MBSR_EBITS) == (MBSR_DTABT|MBSR_MBEXC) &&
313: (ds&HTDS_MOL))
314: goto noprint;
315: printf("tu%d: hard error bn%d mbsr=%b er=%b ds=%b\n",
316: TUUNIT(bp->b_dev), bp->b_blkno,
317: mbsr, mbsr_bits,
318: sc->sc_erreg, hter_bits,
319: sc->sc_dsreg, htds_bits);
320: noprint:
321: bp->b_flags |= B_ERROR;
322: return (MBD_DONE);
323: }
324: if (er)
325: return (MBD_RETRY);
326: }
327: bp->b_resid = 0;
328: if (bp->b_flags & B_READ)
329: if (ds&HTDS_TM) { /* must be a read, right? */
330: bp->b_resid = bp->b_bcount;
331: sc->sc_nxrec = dbtofsb(0, bp->b_blkno);
332: } else if(bp->b_bcount > MASKREG(htaddr->htfc))
333: bp->b_resid = bp->b_bcount - MASKREG(htaddr->htfc);
334: return (MBD_DONE);
335: }
336:
337: htndtint(mi)
338: register struct mba_device *mi;
339: {
340: register struct htdevice *htaddr = (struct htdevice *)mi->mi_drv;
341: register struct buf *bp = mi->mi_tab.b_actf;
342: register struct tu_softc *sc;
343: int er, ds, fc;
344:
345: ds = MASKREG(htaddr->htds);
346: er = MASKREG(htaddr->hter);
347: fc = MASKREG(htaddr->htfc);
348: if (er) {
349: htaddr->htcs1 = HT_DCLR|HT_GO;
350: mbclrattn(mi);
351: }
352: if (bp == 0)
353: return (MBN_SKIP);
354: sc = &tu_softc[TUUNIT(bp->b_dev)];
355: sc->sc_dsreg = ds;
356: sc->sc_erreg = er;
357: sc->sc_resid = fc;
358: if (bp == &chtbuf[HTUNIT(bp->b_dev)]) {
359: switch (bp->b_command) {
360: case HT_REWOFFL:
361: /* offline is on purpose; don't do anything special */
362: ds |= HTDS_MOL;
363: break;
364: case HT_SREV:
365: /* if backspace file hit bot, its not an error */
366: if (er == (HTER_NEF|HTER_FCE) && ds&HTDS_BOT &&
367: bp->b_repcnt == INF)
368: er &= ~HTER_NEF;
369: break;
370: }
371: er &= ~HTER_FCE;
372: if (er == 0)
373: ds &= ~HTDS_ERR;
374: }
375: if ((ds & (HTDS_ERR|HTDS_MOL)) != HTDS_MOL) {
376: if ((ds & HTDS_MOL) == 0 && sc->sc_openf > 0)
377: sc->sc_openf = -1;
378: printf("tu%d: hard error bn%d er=%b ds=%b\n",
379: TUUNIT(bp->b_dev), bp->b_blkno,
380: sc->sc_erreg, hter_bits, sc->sc_dsreg, htds_bits);
381: bp->b_flags |= B_ERROR;
382: return (MBN_DONE);
383: }
384: if (bp == &chtbuf[HTUNIT(bp->b_dev)]) {
385: if (sc->sc_flags & H_REWIND)
386: return (ds & HTDS_BOT ? MBN_DONE : MBN_RETRY);
387: bp->b_resid = -sc->sc_resid;
388: return (MBN_DONE);
389: }
390: if (ds & HTDS_TM)
391: if (sc->sc_blkno > dbtofsb(0, bp->b_blkno)) {
392: sc->sc_nxrec = dbtofsb(0, bp->b_blkno) - fc;
393: sc->sc_blkno = sc->sc_nxrec;
394: } else {
395: sc->sc_blkno = dbtofsb(0, bp->b_blkno) + fc;
396: sc->sc_nxrec = sc->sc_blkno - 1;
397: }
398: else
399: sc->sc_blkno = dbtofsb(0, bp->b_blkno);
400: return (MBN_RETRY);
401: }
402:
403: htread(dev)
404: dev_t dev;
405: {
406:
407: htphys(dev);
408: if (u.u_error)
409: return;
410: physio(htstrategy, &rhtbuf[HTUNIT(dev)], dev, B_READ, minphys);
411: }
412:
413: htwrite(dev)
414: {
415:
416: htphys(dev);
417: if (u.u_error)
418: return;
419: physio(htstrategy, &rhtbuf[HTUNIT(dev)], dev, B_WRITE, minphys);
420: }
421:
422: htphys(dev)
423: dev_t dev;
424: {
425: register int htunit;
426: register struct tu_softc *sc;
427: register struct mba_device *mi;
428: daddr_t a;
429:
430: htunit = HTUNIT(dev);
431: if (htunit >= NHT || (mi = htinfo[htunit]) == 0 || mi->mi_alive == 0) {
432: u.u_error = ENXIO;
433: return;
434: }
435: a = u.u_offset >> 9;
436: sc = &tu_softc[TUUNIT(dev)];
437: sc->sc_blkno = dbtofsb(0, a);
438: sc->sc_nxrec = dbtofsb(0, a)+1;
439: }
440:
441: /*ARGSUSED*/
442: htioctl(dev, cmd, addr, flag)
443: dev_t dev;
444: int cmd;
445: caddr_t addr;
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: case MTIOCTOP: /* tape operation */
460: if (copyin((caddr_t)addr, (caddr_t)&mtop, sizeof(mtop))) {
461: u.u_error = EFAULT;
462: return;
463: }
464: switch(mtop.mt_op) {
465: case MTWEOF:
466: callcount = mtop.mt_count;
467: fcount = 1;
468: break;
469: case MTFSF: case MTBSF:
470: callcount = mtop.mt_count;
471: fcount = INF;
472: break;
473: case MTFSR: case MTBSR:
474: callcount = 1;
475: fcount = mtop.mt_count;
476: break;
477: case MTREW: case MTOFFL:
478: callcount = 1;
479: fcount = 1;
480: break;
481: default:
482: u.u_error = ENXIO;
483: return;
484: }
485: if (callcount <= 0 || fcount <= 0) {
486: u.u_error = ENXIO;
487: return;
488: }
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: u.u_error = EIO;
494: break;
495: }
496: if ((bp->b_flags&B_ERROR) || sc->sc_dsreg&HTDS_BOT)
497: break;
498: }
499: geterror(bp);
500: return;
501: case MTIOCGET:
502: mtget.mt_dsreg = sc->sc_dsreg;
503: mtget.mt_erreg = sc->sc_erreg;
504: mtget.mt_resid = sc->sc_resid;
505: mtget.mt_type = MT_ISHT;
506: if (copyout((caddr_t)&mtget, addr, sizeof(mtget)))
507: u.u_error = EFAULT;
508: return;
509: default:
510: u.u_error = ENXIO;
511: }
512: }
513:
514: #define DBSIZE 20
515:
516: htdump()
517: {
518: register struct mba_device *mi;
519: register struct mba_regs *mp;
520: register struct htdevice *htaddr;
521: int blk, num;
522: int start;
523:
524: start = 0;
525: num = maxfree;
526: #define phys(a,b) ((b)((int)(a)&0x7fffffff))
527: if (htinfo[0] == 0)
528: return (ENXIO);
529: mi = phys(htinfo[0], struct mba_device *);
530: mp = phys(mi->mi_hd, struct mba_hd *)->mh_physmba;
531: mp->mba_cr = MBCR_IE;
532: htaddr = (struct htdevice *)&mp->mba_drv[mi->mi_drive];
533: htaddr->httc = HTTC_PDP11|HTTC_1600BPI;
534: htaddr->htcs1 = HT_DCLR|HT_GO;
535: while (num > 0) {
536: blk = num > DBSIZE ? DBSIZE : num;
537: htdwrite(start, blk, htaddr, mp);
538: start += blk;
539: num -= blk;
540: }
541: hteof(htaddr);
542: hteof(htaddr);
543: htwait(htaddr);
544: if (htaddr->htds&HTDS_ERR)
545: return (EIO);
546: htaddr->htcs1 = HT_REW|HT_GO;
547: return (0);
548: }
549:
550: htdwrite(dbuf, num, htaddr, mp)
551: register dbuf, num;
552: register struct htdevice *htaddr;
553: struct mba_regs *mp;
554: {
555: register struct pte *io;
556: register int i;
557:
558: htwait(htaddr);
559: io = mp->mba_map;
560: for (i = 0; i < num; i++)
561: *(int *)io++ = dbuf++ | PG_V;
562: htaddr->htfc = -(num*NBPG);
563: mp->mba_sr = -1;
564: mp->mba_bcr = -(num*NBPG);
565: mp->mba_var = 0;
566: htaddr->htcs1 = HT_WCOM|HT_GO;
567: }
568:
569: htwait(htaddr)
570: struct htdevice *htaddr;
571: {
572: register s;
573:
574: do
575: s = htaddr->htds;
576: while ((s & HTDS_DRY) == 0);
577: }
578:
579: hteof(htaddr)
580: struct htdevice *htaddr;
581: {
582:
583: htwait(htaddr);
584: htaddr->htcs1 = HT_WEOF|HT_GO;
585: }
586: #endif
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