1 /*-
2 * Copyright (c) 1982, 1986 The Regents of the University of California.
3 * All rights reserved.
4 *
5 * %sccs.include.proprietary.c%
6 *
7 * @(#)ht.c 7.14 (Berkeley) 05/08/91
8 */
9
10 #include "tu.h"
11 #if NHT > 0
12 /*
13 * TM03/TU?? tape driver
14 *
15 * TODO:
16 * cleanup messages on errors
17 * test ioctl's
18 * see how many rewind interrups we get if we kick when not at BOT
19 * fixup rle error on block tape code
20 */
21 #include "sys/param.h"
22 #include "sys/systm.h"
23 #include "sys/buf.h"
24 #include "sys/conf.h"
25 #include "sys/file.h"
26 #include "sys/user.h"
27 #include "sys/proc.h"
28 #include "sys/map.h"
29 #include "sys/ioctl.h"
30 #include "sys/mtio.h"
31 #include "sys/cmap.h"
32 #include "sys/tty.h"
33 #include "sys/syslog.h"
34 #include "sys/tprintf.h"
35
36 #include "../include/pte.h"
37 #include "../include/cpu.h"
38 #include "mbareg.h"
39 #include "mbavar.h"
40 #include "htreg.h"
41
42 struct buf chtbuf[NHT];
43
44 short httypes[] =
45 { MBDT_TM03, MBDT_TE16, MBDT_TU45, MBDT_TU77, 0 };
46 struct mba_device *htinfo[NHT];
47 struct mba_slave *tuinfo[NTU];
48 int htattach(), htslave(), htustart(), htndtint(), htdtint();
49 struct mba_driver htdriver =
50 { htattach, htslave, htustart, 0, htdtint, htndtint,
51 httypes, "ht", "tu", htinfo };
52
53 #define MASKREG(r) ((r) & 0xffff)
54
55 /* bits in minor device */
56 #define TUUNIT(dev) (minor(dev)&03)
57 #define H_NOREWIND 04
58 #define H_DENS(dev) ((minor(dev) >> 3) & 03)
59
60 #define HTUNIT(dev) (tuinfo[TUUNIT(dev)]->ms_ctlr)
61
62 #define INF (daddr_t)1000000L /* a block number that wont exist */
63
64 struct tu_softc {
65 char sc_openf;
66 char sc_flags;
67 daddr_t sc_blkno;
68 daddr_t sc_nxrec;
69 u_short sc_erreg;
70 u_short sc_dsreg;
71 short sc_resid;
72 short sc_dens;
73 tpr_t sc_tpr; /* tprintf handle for errors to user */
74 int sc_blks; /* number of I/O operations since open */
75 int sc_softerrs; /* number of soft I/O errors since open */
76 } tu_softc[NTU];
77
78 /*
79 * Bits for sc_flags.
80 */
81 #define H_WRITTEN 1 /* last operation was a write */
82 #define H_ERASED 2 /* last write retry was an erase gap */
83 #define H_REWIND 4 /* last unit start was a rewind */
84
85 char hter_bits[] = HTER_BITS;
86 char htds_bits[] = HTDS_BITS;
87
88 /*ARGSUSED*/
89 htattach(mi)
90 struct mba_device *mi;
91 {
92
93 }
94
95 htslave(mi, ms, sn)
96 struct mba_device *mi;
97 struct mba_slave *ms;
98 int sn;
99 {
100 register struct htdevice *htaddr = (struct htdevice *)mi->mi_drv;
101
102 htaddr->httc = sn;
103 if (htaddr->htdt & HTDT_SPR) {
104 tuinfo[ms->ms_unit] = ms;
105 return (1);
106 } else
107 return (0);
108 }
109
110 int htdens[4] = { HTTC_800BPI, HTTC_1600BPI, HTTC_6250BPI, HTTC_800BPI };
111
htopen(dev,flag)112 htopen(dev, flag)
113 dev_t dev;
114 int flag;
115 {
116 register int tuunit;
117 register struct tu_softc *sc;
118 register struct mba_slave *ms;
119 int olddens, dens;
120
121 tuunit = TUUNIT(dev);
122 if (tuunit >= NTU || (ms = tuinfo[tuunit]) == NULL ||
123 ms->ms_alive == 0 || htinfo[ms->ms_ctlr]->mi_alive == 0)
124 return (ENXIO);
125 if ((sc = &tu_softc[tuunit])->sc_openf)
126 return (EBUSY);
127 sc->sc_openf = 1;
128 olddens = sc->sc_dens;
129 dens = sc->sc_dens = htdens[H_DENS(dev)] | HTTC_PDP11 | ms->ms_slave;
130 htcommand(dev, HT_SENSE, 1);
131 sc->sc_dens = olddens;
132 if ((sc->sc_dsreg & HTDS_MOL) == 0) {
133 sc->sc_openf = 0;
134 uprintf("tu%d: not online\n", tuunit);
135 return (EIO);
136 }
137 if ((flag&FWRITE) && (sc->sc_dsreg&HTDS_WRL)) {
138 sc->sc_openf = 0;
139 uprintf("tu%d: no write ring\n", tuunit);
140 return (EIO);
141 }
142 if ((sc->sc_dsreg & HTDS_BOT) == 0 && (flag&FWRITE) &&
143 dens != sc->sc_dens) {
144 sc->sc_openf = 0;
145 uprintf("tu%d: can't change density in mid-tape\n", tuunit);
146 return (EIO);
147 }
148 sc->sc_blkno = (daddr_t)0;
149 sc->sc_nxrec = INF;
150 sc->sc_flags = 0;
151 sc->sc_dens = dens;
152 sc->sc_blks = 0;
153 sc->sc_softerrs = 0;
154 sc->sc_tpr = tprintf_open();
155 return (0);
156 }
157
htclose(dev,flag)158 htclose(dev, flag)
159 register dev_t dev;
160 register flag;
161 {
162 register struct tu_softc *sc = &tu_softc[TUUNIT(dev)];
163
164 if (flag == FWRITE || ((flag&FWRITE) && (sc->sc_flags&H_WRITTEN))) {
165 htcommand(dev, HT_WEOF, 1);
166 htcommand(dev, HT_WEOF, 1);
167 htcommand(dev, HT_SREV, 1);
168 }
169 if ((minor(dev)&H_NOREWIND) == 0)
170 htcommand(dev, HT_REW, 0);
171 if (sc->sc_blks > 100 && sc->sc_softerrs > sc->sc_blks / 100)
172 log(LOG_INFO, "tu%d: %d soft errors in %d blocks\n",
173 TUUNIT(dev), sc->sc_softerrs, sc->sc_blks);
174 tprintf_close(sc->sc_tpr);
175 sc->sc_openf = 0;
176 return (0);
177 }
178
htcommand(dev,com,count)179 htcommand(dev, com, count)
180 dev_t dev;
181 int com, count;
182 {
183 register struct buf *bp;
184 register int s;
185
186 bp = &chtbuf[HTUNIT(dev)];
187 s = spl5();
188 while (bp->b_flags&B_BUSY) {
189 if(bp->b_repcnt == 0 && (bp->b_flags&B_DONE))
190 break;
191 bp->b_flags |= B_WANTED;
192 sleep((caddr_t)bp, PRIBIO);
193 }
194 bp->b_flags = B_BUSY|B_READ;
195 splx(s);
196 bp->b_dev = dev;
197 bp->b_command = com;
198 bp->b_repcnt = count;
199 bp->b_blkno = 0;
200 htstrategy(bp);
201 if (count == 0)
202 return;
203 iowait(bp);
204 if (bp->b_flags&B_WANTED)
205 wakeup((caddr_t)bp);
206 bp->b_flags &= B_ERROR;
207 }
208
htstrategy(bp)209 htstrategy(bp)
210 register struct buf *bp;
211 {
212 register struct mba_device *mi = htinfo[HTUNIT(bp->b_dev)];
213 register struct buf *dp;
214 register int s;
215
216 bp->av_forw = NULL;
217 dp = &mi->mi_tab;
218 s = spl5();
219 if (dp->b_actf == NULL)
220 dp->b_actf = bp;
221 else
222 dp->b_actl->av_forw = bp;
223 dp->b_actl = bp;
224 if (dp->b_active == 0)
225 mbustart(mi);
226 splx(s);
227 }
228
htustart(mi)229 htustart(mi)
230 register struct mba_device *mi;
231 {
232 register struct htdevice *htaddr =
233 (struct htdevice *)mi->mi_drv;
234 register struct buf *bp = mi->mi_tab.b_actf;
235 register struct tu_softc *sc = &tu_softc[TUUNIT(bp->b_dev)];
236 daddr_t blkno;
237
238 htaddr->httc = sc->sc_dens;
239 #ifdef notdef
240 /* unneeded, may hang controller */
241 if (bp == &chtbuf[HTUNIT(bp->b_dev)] && bp->b_command == HT_SENSE) {
242 htaddr->htcs1 = HT_SENSE|HT_GO;
243 mbclrattn(mi);
244 }
245 #endif
246 sc->sc_dsreg = htaddr->htds;
247 sc->sc_erreg = htaddr->hter;
248 sc->sc_resid = htaddr->htfc;
249 sc->sc_flags &= ~(H_WRITTEN|H_REWIND);
250 if ((htaddr->htdt & HTDT_SPR) == 0 || (htaddr->htds & HTDS_MOL) == 0)
251 if (sc->sc_openf > 0)
252 sc->sc_openf = -1;
253 if (sc->sc_openf < 0) {
254 bp->b_flags |= B_ERROR;
255 return (MBU_NEXT);
256 }
257 if (bp != &chtbuf[HTUNIT(bp->b_dev)]) {
258 /* transfer: check positioning */
259 if (bp->b_flags & B_RAW) {
260 /* raw transfer: record position for retry */
261 if (mi->mi_tab.b_errcnt == 0) {
262 sc->sc_blkno = bdbtofsb(bp->b_blkno);
263 sc->sc_nxrec = sc->sc_blkno + 1;
264 }
265 } else {
266 if (bdbtofsb(bp->b_blkno) > sc->sc_nxrec) {
267 bp->b_flags |= B_ERROR;
268 bp->b_error = ENXIO;
269 return (MBU_NEXT);
270 }
271 if (bdbtofsb(bp->b_blkno) == sc->sc_nxrec &&
272 bp->b_flags&B_READ) {
273 bp->b_resid = bp->b_bcount;
274 clrbuf(bp);
275 return (MBU_NEXT);
276 }
277 if ((bp->b_flags&B_READ)==0)
278 sc->sc_nxrec = bdbtofsb(bp->b_blkno) + 1;
279 }
280 } else {
281 if (bp->b_command == HT_SENSE)
282 return (MBU_NEXT);
283 if (bp->b_command == HT_REW)
284 sc->sc_flags |= H_REWIND;
285 else
286 htaddr->htfc = -bp->b_bcount;
287 htaddr->htcs1 = bp->b_command|HT_GO;
288 return (MBU_STARTED);
289 }
290 if ((blkno = sc->sc_blkno) == bdbtofsb(bp->b_blkno)) {
291 htaddr->htfc = -bp->b_bcount;
292 if ((bp->b_flags&B_READ) == 0) {
293 if (mi->mi_tab.b_errcnt) {
294 if ((sc->sc_flags & H_ERASED) == 0) {
295 sc->sc_flags |= H_ERASED;
296 htaddr->htcs1 = HT_ERASE | HT_GO;
297 return (MBU_STARTED);
298 }
299 sc->sc_flags &= ~H_ERASED;
300 }
301 if (htaddr->htds & HTDS_EOT) {
302 bp->b_resid = bp->b_bcount;
303 bp->b_flags |= B_ERROR;
304 return (MBU_NEXT);
305 }
306 }
307 return (MBU_DODATA);
308 }
309 if (blkno < bdbtofsb(bp->b_blkno)) {
310 htaddr->htfc = blkno - bdbtofsb(bp->b_blkno);
311 htaddr->htcs1 = HT_SFORW|HT_GO;
312 } else {
313 htaddr->htfc = bdbtofsb(bp->b_blkno) - blkno;
314 htaddr->htcs1 = HT_SREV|HT_GO;
315 }
316 return (MBU_STARTED);
317 }
318
htdtint(mi,mbsr)319 htdtint(mi, mbsr)
320 register struct mba_device *mi;
321 int mbsr;
322 {
323 register struct htdevice *htaddr = (struct htdevice *)mi->mi_drv;
324 register struct buf *bp = mi->mi_tab.b_actf;
325 register struct tu_softc *sc;
326 int ds, er, mbs;
327
328 sc = &tu_softc[TUUNIT(bp->b_dev)];
329 ds = sc->sc_dsreg = MASKREG(htaddr->htds);
330 er = sc->sc_erreg = MASKREG(htaddr->hter);
331 sc->sc_resid = MASKREG(htaddr->htfc);
332 mbs = mbsr;
333 sc->sc_blkno++;
334 if((bp->b_flags & B_READ) == 0)
335 sc->sc_flags |= H_WRITTEN;
336 if ((ds&(HTDS_ERR|HTDS_MOL)) != HTDS_MOL || mbs & MBSR_EBITS) {
337 htaddr->htcs1 = HT_DCLR|HT_GO;
338 mbclrattn(mi);
339 if (bp->b_flags & B_RAW) {
340 er &= ~HTER_FCE;
341 mbs &= ~(MBSR_DTABT|MBSR_MBEXC);
342 }
343 if (bp->b_flags & B_READ && ds & HTDS_PES)
344 er &= ~(HTER_CSITM|HTER_CORCRC);
345 if (er&HTER_HARD || mbs&MBSR_EBITS || (ds&HTDS_MOL) == 0 ||
346 er && ++mi->mi_tab.b_errcnt >= 7) {
347 if ((ds & HTDS_MOL) == 0 && sc->sc_openf > 0)
348 sc->sc_openf = -1;
349 if ((er&HTER_HARD) == HTER_FCE &&
350 (mbs&MBSR_EBITS) == (MBSR_DTABT|MBSR_MBEXC) &&
351 (ds&HTDS_MOL))
352 goto noprint;
353 tprintf(sc->sc_tpr,
354 "tu%d: hard error bn%d mbsr=%b er=%b ds=%b\n",
355 TUUNIT(bp->b_dev), bp->b_blkno,
356 mbsr, mbsr_bits,
357 sc->sc_erreg, hter_bits,
358 sc->sc_dsreg, htds_bits);
359 noprint:
360 bp->b_flags |= B_ERROR;
361 return (MBD_DONE);
362 }
363 if (er)
364 return (MBD_RETRY);
365 }
366 bp->b_resid = 0;
367 sc->sc_blks++;
368 if (mi->mi_tab.b_errcnt)
369 sc->sc_softerrs++;
370 if (bp->b_flags & B_READ)
371 if (ds&HTDS_TM) { /* must be a read, right? */
372 bp->b_resid = bp->b_bcount;
373 sc->sc_nxrec = bdbtofsb(bp->b_blkno);
374 } else if(bp->b_bcount > MASKREG(htaddr->htfc))
375 bp->b_resid = bp->b_bcount - MASKREG(htaddr->htfc);
376 return (MBD_DONE);
377 }
378
htndtint(mi)379 htndtint(mi)
380 register struct mba_device *mi;
381 {
382 register struct htdevice *htaddr = (struct htdevice *)mi->mi_drv;
383 register struct buf *bp = mi->mi_tab.b_actf;
384 register struct tu_softc *sc;
385 int er, ds, fc;
386
387 ds = MASKREG(htaddr->htds);
388 er = MASKREG(htaddr->hter);
389 fc = MASKREG(htaddr->htfc);
390 if (er) {
391 htaddr->htcs1 = HT_DCLR|HT_GO;
392 mbclrattn(mi);
393 }
394 if (bp == 0)
395 return (MBN_SKIP);
396 sc = &tu_softc[TUUNIT(bp->b_dev)];
397 sc->sc_dsreg = ds;
398 sc->sc_erreg = er;
399 sc->sc_resid = fc;
400 if (bp == &chtbuf[HTUNIT(bp->b_dev)]) {
401 switch ((int)bp->b_command) {
402 case HT_REWOFFL:
403 /* offline is on purpose; don't do anything special */
404 ds |= HTDS_MOL;
405 break;
406 case HT_SREV:
407 /* if backspace file hit bot, its not an error */
408 if (er == (HTER_NEF|HTER_FCE) && ds&HTDS_BOT &&
409 bp->b_repcnt == INF)
410 er &= ~HTER_NEF;
411 break;
412 }
413 er &= ~HTER_FCE;
414 if (er == 0)
415 ds &= ~HTDS_ERR;
416 }
417 if ((ds & (HTDS_ERR|HTDS_MOL)) != HTDS_MOL) {
418 if ((ds & HTDS_MOL) == 0 && sc->sc_openf > 0)
419 sc->sc_openf = -1;
420 tprintf(sc->sc_tpr, "tu%d: hard error bn%d er=%b ds=%b\n",
421 TUUNIT(bp->b_dev), bp->b_blkno,
422 sc->sc_erreg, hter_bits, sc->sc_dsreg, htds_bits);
423 bp->b_flags |= B_ERROR;
424 return (MBN_DONE);
425 }
426 if (bp == &chtbuf[HTUNIT(bp->b_dev)]) {
427 if (sc->sc_flags & H_REWIND)
428 return (ds & HTDS_BOT ? MBN_DONE : MBN_RETRY);
429 bp->b_resid = -sc->sc_resid;
430 return (MBN_DONE);
431 }
432 if (ds & HTDS_TM)
433 if (sc->sc_blkno > bdbtofsb(bp->b_blkno)) {
434 sc->sc_nxrec = bdbtofsb(bp->b_blkno) - fc;
435 sc->sc_blkno = sc->sc_nxrec;
436 } else {
437 sc->sc_blkno = bdbtofsb(bp->b_blkno) + fc;
438 sc->sc_nxrec = sc->sc_blkno - 1;
439 }
440 else
441 sc->sc_blkno = bdbtofsb(bp->b_blkno);
442 return (MBN_RETRY);
443 }
444
445 /*ARGSUSED*/
htioctl(dev,cmd,data,flag)446 htioctl(dev, cmd, data, flag)
447 dev_t dev;
448 int cmd;
449 caddr_t data;
450 int flag;
451 {
452 register struct tu_softc *sc = &tu_softc[TUUNIT(dev)];
453 register struct buf *bp = &chtbuf[HTUNIT(dev)];
454 register callcount;
455 int fcount;
456 struct mtop *mtop;
457 struct mtget *mtget;
458 /* we depend of the values and order of the MT codes here */
459 static htops[] =
460 {HT_WEOF,HT_SFORW,HT_SREV,HT_SFORW,HT_SREV,HT_REW,HT_REWOFFL,HT_SENSE};
461
462 switch (cmd) {
463
464 case MTIOCTOP: /* tape operation */
465 mtop = (struct mtop *)data;
466 switch (mtop->mt_op) {
467
468 case MTWEOF:
469 callcount = mtop->mt_count;
470 fcount = 1;
471 break;
472
473 case MTFSF: case MTBSF:
474 callcount = mtop->mt_count;
475 fcount = INF;
476 break;
477
478 case MTFSR: case MTBSR:
479 callcount = 1;
480 fcount = mtop->mt_count;
481 break;
482
483 case MTREW: case MTOFFL:
484 callcount = 1;
485 fcount = 1;
486 break;
487
488 default:
489 return (ENXIO);
490 }
491 if (callcount <= 0 || fcount <= 0)
492 return (EINVAL);
493 while (--callcount >= 0) {
494 htcommand(dev, htops[mtop->mt_op], fcount);
495 if ((mtop->mt_op == MTFSR || mtop->mt_op == MTBSR) &&
496 bp->b_resid)
497 return (EIO);
498 if ((bp->b_flags&B_ERROR) || sc->sc_dsreg&HTDS_BOT)
499 break;
500 }
501 if (bp->b_flags&B_ERROR)
502 return (bp->b_error ? bp->b_error : EIO);
503 return (0);
504
505 case MTIOCGET:
506 mtget = (struct mtget *)data;
507 mtget->mt_dsreg = sc->sc_dsreg;
508 mtget->mt_erreg = sc->sc_erreg;
509 mtget->mt_resid = sc->sc_resid;
510 mtget->mt_type = MT_ISHT;
511 break;
512
513 default:
514 return (ENXIO);
515 }
516 return (0);
517 }
518
519 #define DBSIZE 20
520
htdump()521 htdump()
522 {
523 register struct mba_device *mi;
524 register struct mba_regs *mp;
525 register struct htdevice *htaddr;
526 int blk, num;
527 int start;
528
529 start = 0;
530 num = maxfree;
531 #define phys(a,b) ((b)((int)(a)&0x7fffffff))
532 if (htinfo[0] == 0)
533 return (ENXIO);
534 mi = phys(htinfo[0], struct mba_device *);
535 mp = phys(mi->mi_hd, struct mba_hd *)->mh_physmba;
536 mp->mba_cr = MBCR_IE;
537 htaddr = (struct htdevice *)&mp->mba_drv[mi->mi_drive];
538 htaddr->httc = HTTC_PDP11|HTTC_1600BPI;
539 htaddr->htcs1 = HT_DCLR|HT_GO;
540 while (num > 0) {
541 blk = num > DBSIZE ? DBSIZE : num;
542 htdwrite(start, blk, htaddr, mp);
543 start += blk;
544 num -= blk;
545 }
546 hteof(htaddr);
547 hteof(htaddr);
548 htwait(htaddr);
549 if (htaddr->htds&HTDS_ERR)
550 return (EIO);
551 htaddr->htcs1 = HT_REW|HT_GO;
552 return (0);
553 }
554
htdwrite(dbuf,num,htaddr,mp)555 htdwrite(dbuf, num, htaddr, mp)
556 register dbuf, num;
557 register struct htdevice *htaddr;
558 struct mba_regs *mp;
559 {
560 register struct pte *io;
561 register int i;
562
563 htwait(htaddr);
564 io = mp->mba_map;
565 for (i = 0; i < num; i++)
566 *(int *)io++ = dbuf++ | PG_V;
567 htaddr->htfc = -(num*NBPG);
568 mp->mba_sr = -1;
569 mp->mba_bcr = -(num*NBPG);
570 mp->mba_var = 0;
571 htaddr->htcs1 = HT_WCOM|HT_GO;
572 }
573
574 htwait(htaddr)
575 struct htdevice *htaddr;
576 {
577 register s;
578
579 do
580 s = htaddr->htds;
581 while ((s & HTDS_DRY) == 0);
582 }
583
584 hteof(htaddr)
585 struct htdevice *htaddr;
586 {
587
588 htwait(htaddr);
589 htaddr->htcs1 = HT_WEOF|HT_GO;
590 }
591 #endif
592