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85888457 C |
1 | /* mt.c 4.15 82/12/17 */ |
2 | ||
3 | #include "mu.h" | |
4 | #if NMT > 0 | |
5 | /* | |
6 | * TM78/TU78 tape driver | |
7 | * | |
8 | * Behavior in complex error situations is uncertain... | |
9 | * | |
10 | * TODO: | |
11 | * test error recovery | |
12 | * add odd byte count kludge from VMS driver | |
13 | * write dump routine | |
14 | */ | |
15 | #include "../machine/pte.h" | |
16 | ||
17 | #include "../h/param.h" | |
18 | #include "../h/systm.h" | |
19 | #include "../h/buf.h" | |
20 | #include "../h/conf.h" | |
21 | #include "../h/dir.h" | |
22 | #include "../h/file.h" | |
23 | #include "../h/user.h" | |
24 | #include "../h/map.h" | |
25 | #include "../h/ioctl.h" | |
26 | #include "../h/mtio.h" | |
27 | #include "../h/cmap.h" | |
28 | #include "../h/uio.h" | |
29 | ||
30 | #include "../vax/cpu.h" | |
31 | #include "../vaxmba/mbareg.h" | |
32 | #include "../vaxmba/mbavar.h" | |
33 | #include "../vaxmba/mtreg.h" | |
34 | ||
35 | struct buf rmtbuf[NMT]; | |
36 | struct buf cmtbuf[NMT]; | |
37 | ||
38 | short mttypes[] = | |
39 | { MBDT_TU78, 0 }; | |
40 | struct mba_device *mtinfo[NMT]; | |
41 | int mtattach(), mtslave(), mtustart(), mtstart(), mtndtint(), mtdtint(); | |
42 | struct mba_driver mtdriver = | |
43 | { mtattach, mtslave, mtustart, mtstart, mtdtint, mtndtint, | |
44 | mttypes, "mt", "mu", mtinfo }; | |
45 | ||
46 | #define MASKREG(r) ((r) & 0xffff) | |
47 | ||
48 | /* bits in minor device */ | |
49 | #define MUUNIT(dev) (minor(dev)&03) | |
50 | #define H_NOREWIND 04 | |
51 | #define H_6250BPI 08 | |
52 | ||
53 | #define MTUNIT(dev) (mutomt[MUUNIT(dev)]) | |
54 | ||
55 | #define INF (daddr_t)1000000L /* a block number that wont exist */ | |
56 | ||
57 | struct mu_softc { | |
58 | char sc_openf; | |
59 | char sc_flags; | |
60 | daddr_t sc_blkno; | |
61 | daddr_t sc_nxrec; | |
62 | u_short sc_erreg; | |
63 | u_short sc_dsreg; | |
64 | short sc_resid; | |
65 | short sc_dens; | |
66 | struct mba_device *sc_mi; | |
67 | int sc_slave; | |
68 | } mu_softc[NMU]; | |
69 | short mutomt[NMU]; | |
70 | ||
71 | /* | |
72 | * Bits for sc_flags. | |
73 | */ | |
74 | #define H_WRITTEN 1 /* last operation was a write */ | |
75 | ||
76 | char mtds_bits[] = MTDS_BITS; | |
77 | ||
78 | /*ARGSUSED*/ | |
79 | mtattach(mi) | |
80 | struct mba_device *mi; | |
81 | { | |
82 | ||
83 | } | |
84 | ||
85 | mtslave(mi, ms, sn) | |
86 | struct mba_device *mi; | |
87 | struct mba_slave *ms; | |
88 | int sn; | |
89 | { | |
90 | register struct mu_softc *sc = &mu_softc[ms->ms_unit]; | |
91 | register struct mtdevice *mtaddr = (struct mtdevice *)mi->mi_drv; | |
92 | int s = spl7(), rtn = 0; | |
93 | ||
94 | mtaddr->mtas = -1; | |
95 | mtaddr->mtncs[sn] = MT_SENSE|MT_GO; | |
96 | while (mtaddr->mtas == 0) | |
97 | ; | |
98 | if ((mtaddr->mtner & MTER_INTCODE) == MTER_DONE && | |
99 | (mtaddr->mtds & MTDS_PRES)) { | |
100 | sc->sc_mi = mi; | |
101 | sc->sc_slave = sn; | |
102 | mutomt[ms->ms_unit] = mi->mi_unit; | |
103 | rtn = 1; | |
104 | } | |
105 | mtaddr->mtas = mtaddr->mtas; | |
106 | splx(s); | |
107 | return (rtn); | |
108 | } | |
109 | ||
110 | mtopen(dev, flag) | |
111 | dev_t dev; | |
112 | int flag; | |
113 | { | |
114 | register int muunit; | |
115 | register struct mba_device *mi; | |
116 | register struct mu_softc *sc; | |
117 | int olddens, dens; | |
118 | ||
119 | muunit = MUUNIT(dev); | |
120 | if (muunit >= NMU || (sc = &mu_softc[muunit])->sc_openf || | |
121 | (mi = mtinfo[MTUNIT(dev)]) == 0 || mi->mi_alive == 0) | |
122 | return (ENXIO); | |
123 | olddens = sc->sc_dens; | |
124 | dens = sc->sc_dens = (minor(dev)&H_6250BPI) ? MT_GCR : 0; | |
125 | mtcommand(dev, MT_SENSE, 1); | |
126 | sc->sc_dens = olddens; | |
127 | if ((sc->sc_dsreg & MTDS_ONL) == 0) { | |
128 | uprintf("mu%d: not online\n", muunit); | |
129 | return (EIO); | |
130 | } | |
131 | if ((flag&FWRITE) && (sc->sc_dsreg&MTDS_FPT)) { | |
132 | uprintf("mu%d: no write ring\n", muunit); | |
133 | return (EIO); | |
134 | } | |
135 | if ((sc->sc_dsreg & MTDS_BOT) == 0 && (flag&FWRITE) && | |
136 | dens != sc->sc_dens) { | |
137 | uprintf("mu%d: can't change density in mid-tape\n", muunit); | |
138 | return (EIO); | |
139 | } | |
140 | sc->sc_openf = 1; | |
141 | sc->sc_blkno = (daddr_t)0; | |
142 | sc->sc_nxrec = INF; | |
143 | sc->sc_flags = 0; | |
144 | sc->sc_dens = dens; | |
145 | return (0); | |
146 | } | |
147 | ||
148 | mtclose(dev, flag) | |
149 | register dev_t dev; | |
150 | register flag; | |
151 | { | |
152 | register struct mu_softc *sc = &mu_softc[MUUNIT(dev)]; | |
153 | ||
154 | if (flag == FWRITE || ((flag&FWRITE) && (sc->sc_flags&H_WRITTEN))) | |
155 | mtcommand(dev, MT_CLS|sc->sc_dens, 1); | |
156 | if ((minor(dev)&H_NOREWIND) == 0) | |
157 | mtcommand(dev, MT_REW, 0); | |
158 | sc->sc_openf = 0; | |
159 | } | |
160 | ||
161 | mtcommand(dev, com, count) | |
162 | dev_t dev; | |
163 | int com, count; | |
164 | { | |
165 | register struct buf *bp; | |
166 | register int s; | |
167 | ||
168 | bp = &cmtbuf[MTUNIT(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 | mtstrategy(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 | mtstrategy(bp) | |
192 | register struct buf *bp; | |
193 | { | |
194 | register struct mba_device *mi = mtinfo[MTUNIT(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 | mtustart(mi) | |
212 | register struct mba_device *mi; | |
213 | { | |
214 | register struct mtdevice *mtaddr = | |
215 | (struct mtdevice *)mi->mi_drv; | |
216 | register struct buf *bp = mi->mi_tab.b_actf; | |
217 | register struct mu_softc *sc = &mu_softc[MUUNIT(bp->b_dev)]; | |
218 | daddr_t blkno; | |
219 | ||
220 | sc->sc_flags &= ~H_WRITTEN; | |
221 | if (sc->sc_openf < 0) { | |
222 | bp->b_flags |= B_ERROR; | |
223 | return (MBU_NEXT); | |
224 | } | |
225 | if (bp != &cmtbuf[MTUNIT(bp->b_dev)]) { | |
226 | if (bdbtofsb(bp->b_blkno) > sc->sc_nxrec) { | |
227 | bp->b_flags |= B_ERROR; | |
228 | bp->b_error = ENXIO; | |
229 | return (MBU_NEXT); | |
230 | } | |
231 | if (bdbtofsb(bp->b_blkno) == sc->sc_nxrec && | |
232 | bp->b_flags&B_READ) { | |
233 | bp->b_resid = bp->b_bcount; | |
234 | clrbuf(bp); | |
235 | return (MBU_NEXT); | |
236 | } | |
237 | if ((bp->b_flags&B_READ)==0) | |
238 | sc->sc_nxrec = bdbtofsb(bp->b_blkno) + 1; | |
239 | } else { | |
240 | mtaddr->mtncs[MUUNIT(bp->b_dev)] = | |
241 | (bp->b_repcnt<<8)|bp->b_command|MT_GO; | |
242 | return (MBU_STARTED); | |
243 | } | |
244 | if ((blkno = sc->sc_blkno) == bdbtofsb(bp->b_blkno)) { | |
245 | if (mi->mi_tab.b_errcnt == 2) { | |
246 | mtaddr->mtca = MUUNIT(bp->b_dev); | |
247 | } else { | |
248 | mtaddr->mtbc = bp->b_bcount; | |
249 | mtaddr->mtca = (1<<2)|MUUNIT(bp->b_dev); | |
250 | } | |
251 | return (MBU_DODATA); | |
252 | } | |
253 | if (blkno < bdbtofsb(bp->b_blkno)) | |
254 | mtaddr->mtncs[MUUNIT(bp->b_dev)] = | |
255 | (min((unsigned)(bdbtofsb(bp->b_blkno) - blkno), 0377) << 8) | | |
256 | MT_SFORW|MT_GO; | |
257 | else | |
258 | mtaddr->mtncs[MUUNIT(bp->b_dev)] = | |
259 | (min((unsigned)(blkno - bdbtofsb(bp->b_blkno)), 0377) << 8) | | |
260 | MT_SREV|MT_GO; | |
261 | return (MBU_STARTED); | |
262 | } | |
263 | ||
264 | mtstart(mi) | |
265 | register struct mba_device *mi; | |
266 | { | |
267 | register struct buf *bp = mi->mi_tab.b_actf; | |
268 | register struct mu_softc *sc = &mu_softc[MUUNIT(bp->b_dev)]; | |
269 | ||
270 | if (bp->b_flags & B_READ) | |
271 | if (mi->mi_tab.b_errcnt == 2) | |
272 | return(MT_READREV|MT_GO); | |
273 | else | |
274 | return(MT_READ|MT_GO); | |
275 | else | |
276 | return(MT_WRITE|sc->sc_dens|MT_GO); | |
277 | } | |
278 | ||
279 | mtdtint(mi, mbsr) | |
280 | register struct mba_device *mi; | |
281 | int mbsr; | |
282 | { | |
283 | register struct mtdevice *mtaddr = (struct mtdevice *)mi->mi_drv; | |
284 | register struct buf *bp = mi->mi_tab.b_actf; | |
285 | register struct mu_softc *sc; | |
286 | ||
287 | /* I'M NOT SURE IF THIS SHOULD ALWAYS BE THE CASE SO FOR NOW... */ | |
288 | if ((mtaddr->mtca&3) != MUUNIT(bp->b_dev)) { | |
289 | printf("mt: wrong unit!\n"); | |
290 | mtaddr->mtca = MUUNIT(bp->b_dev); | |
291 | } | |
292 | sc = &mu_softc[MUUNIT(bp->b_dev)]; | |
293 | sc->sc_erreg = mtaddr->mter; | |
294 | if((bp->b_flags & B_READ) == 0) | |
295 | sc->sc_flags |= H_WRITTEN; | |
296 | switch (sc->sc_erreg & MTER_INTCODE) { | |
297 | case MTER_DONE: | |
298 | case MTER_LONGREC: | |
299 | if (mi->mi_tab.b_errcnt != 2) | |
300 | sc->sc_blkno++; | |
301 | bp->b_resid = 0; | |
302 | break; | |
303 | ||
304 | case MTER_NOTCAP: | |
305 | printf("mu%d: blank tape\n", MUUNIT(bp->b_dev)); | |
306 | goto err; | |
307 | ||
308 | case MTER_TM: | |
309 | case MTER_EOT: | |
310 | sc->sc_blkno++; | |
311 | err: | |
312 | bp->b_resid = bp->b_bcount; | |
313 | sc->sc_nxrec = bdbtofsb(bp->b_blkno); | |
314 | break; | |
315 | ||
316 | case MTER_SHRTREC: | |
317 | sc->sc_blkno++; | |
318 | if (bp != &rmtbuf[MTUNIT(bp->b_dev)]) | |
319 | bp->b_flags |= B_ERROR; | |
320 | if (mi->mi_tab.b_errcnt == 2) | |
321 | bp->b_bcount = bp->b_resid; /* restore saved value */ | |
322 | bp->b_resid = bp->b_bcount - mtaddr->mtbc; | |
323 | break; | |
324 | ||
325 | case MTER_RDOPP: | |
326 | mi->mi_tab.b_errcnt = 2; /* indicate "read opposite" */ | |
327 | bp->b_resid = bp->b_bcount; /* save it */ | |
328 | bp->b_bcount = mtaddr->mtbc; /* use this instead */ | |
329 | return(MBD_RETRY); | |
330 | ||
331 | case MTER_RETRY: | |
332 | mi->mi_tab.b_errcnt = 1; /* indicate simple retry */ | |
333 | return(MBD_RETRY); | |
334 | ||
335 | case MTER_OFFLINE: | |
336 | if (sc->sc_openf > 0) { | |
337 | sc->sc_openf = -1; | |
338 | printf("mu%d: offline\n", MUUNIT(bp->b_dev)); | |
339 | } | |
340 | bp->b_flags |= B_ERROR; | |
341 | break; | |
342 | ||
343 | case MTER_FPT: | |
344 | printf("mu%d: no write ring\n", MUUNIT(bp->b_dev)); | |
345 | bp->b_flags |= B_ERROR; | |
346 | break; | |
347 | ||
348 | default: | |
349 | printf("mu%d: hard error bn%d mbsr=%b er=%x ds=%b\n", | |
350 | MUUNIT(bp->b_dev), bp->b_blkno, | |
351 | mbsr, mbsr_bits, sc->sc_erreg, | |
352 | sc->sc_dsreg, mtds_bits); | |
353 | bp->b_flags |= B_ERROR; | |
354 | mtaddr->mtid = MTID_CLR; /* reset the TM78 */ | |
355 | DELAY(250); | |
356 | while ((mtaddr->mtid & MTID_RDY) == 0) /* wait for it */ | |
357 | ; | |
358 | return (MBD_DONE); | |
359 | } | |
360 | /* CHECK FOR MBA ERROR WHEN NO OTHER ERROR INDICATED? */ | |
361 | return (MBD_DONE); | |
362 | } | |
363 | ||
364 | mtndtint(mi) | |
365 | register struct mba_device *mi; | |
366 | { | |
367 | register struct mtdevice *mtaddr = (struct mtdevice *)mi->mi_drv; | |
368 | register struct buf *bp = mi->mi_tab.b_actf; | |
369 | register struct mu_softc *sc; | |
370 | int er, fc, unit; | |
371 | ||
372 | unit = (mtaddr->mtner >> 8) & 3; | |
373 | er = MASKREG(mtaddr->mtner); | |
374 | /* WILL THIS OCCUR IF ANOTHER DRIVE COMES ONLINE? */ | |
375 | if (bp == 0 || unit != MUUNIT(bp->b_dev)) { /* consistency check */ | |
376 | if ((er & MTER_INTCODE) != MTER_ONLINE) | |
377 | printf("mt: unit %d random interrupt\n", unit); | |
378 | return (MBN_SKIP); | |
379 | } | |
380 | if (bp == 0) | |
381 | return (MBN_SKIP); | |
382 | fc = (mtaddr->mtncs[unit] >> 8) & 0xff; | |
383 | sc = &mu_softc[unit]; | |
384 | sc->sc_erreg = er; | |
385 | sc->sc_resid = fc; | |
386 | switch (er & MTER_INTCODE) { | |
387 | case MTER_DONE: | |
388 | if (bp == &cmtbuf[MTUNIT(bp->b_dev)]) { | |
389 | done: | |
390 | if (bp->b_command == MT_SENSE) | |
391 | sc->sc_dsreg = MASKREG(mtaddr->mtds); | |
392 | bp->b_resid = fc; | |
393 | return (MBN_DONE); | |
394 | } | |
395 | /* this is UGLY! (but is it correct?) */ | |
396 | if ((fc = bdbtofsb(bp->b_blkno) - sc->sc_blkno) < 0) | |
397 | sc->sc_blkno -= MIN(0377, -fc); | |
398 | else | |
399 | sc->sc_blkno += MIN(0377, fc); | |
400 | return (MBN_RETRY); | |
401 | ||
402 | case MTER_RWDING: | |
403 | return (MBN_SKIP); /* ignore "rewind started" interrupt */ | |
404 | ||
405 | case MTER_NOTCAP: | |
406 | printf("mu%d: blank tape\n", MUUNIT(bp->b_dev)); | |
407 | ||
408 | case MTER_TM: | |
409 | case MTER_EOT: | |
410 | case MTER_LEOT: | |
411 | if (sc->sc_blkno > bdbtofsb(bp->b_blkno)) { | |
412 | sc->sc_nxrec = bdbtofsb(bp->b_blkno) + fc; | |
413 | sc->sc_blkno = sc->sc_nxrec; | |
414 | } else { | |
415 | sc->sc_blkno = bdbtofsb(bp->b_blkno) - fc; | |
416 | sc->sc_nxrec = sc->sc_blkno - 1; | |
417 | } | |
418 | return (MBN_RETRY); | |
419 | ||
420 | case MTER_FPT: | |
421 | printf("mu%d: no write ring\n", MUUNIT(bp->b_dev)); | |
422 | bp->b_flags |= B_ERROR; | |
423 | return (MBN_DONE); | |
424 | ||
425 | case MTER_OFFLINE: | |
426 | if (sc->sc_openf > 0) { | |
427 | sc->sc_openf = -1; | |
428 | printf("mu%d: offline\n", MUUNIT(bp->b_dev)); | |
429 | } | |
430 | bp->b_flags |= B_ERROR; | |
431 | return (MBN_DONE); | |
432 | ||
433 | case MTER_BOT: | |
434 | if (bp == &cmtbuf[MTUNIT(bp->b_dev)]) | |
435 | goto done; | |
436 | /* FALL THROUGH */ | |
437 | ||
438 | default: | |
439 | printf("mu%d: hard error bn%d er=%o ds=%b\n", | |
440 | MUUNIT(bp->b_dev), bp->b_blkno, | |
441 | sc->sc_erreg, sc->sc_dsreg, mtds_bits); | |
442 | mtaddr->mtid = MTID_CLR; /* reset the TM78 */ | |
443 | DELAY(250); | |
444 | while ((mtaddr->mtid & MTID_RDY) == 0) /* wait for it */ | |
445 | ; | |
446 | bp->b_flags |= B_ERROR; | |
447 | return (MBN_DONE); | |
448 | } | |
449 | /* NOTREACHED */ | |
450 | } | |
451 | ||
452 | mtread(dev, uio) | |
453 | dev_t dev; | |
454 | struct uio *uio; | |
455 | { | |
456 | int errno; | |
457 | ||
458 | errno = mtphys(dev, uio); | |
459 | if (errno) | |
460 | return (errno); | |
461 | return (physio(mtstrategy, &rmtbuf[MTUNIT(dev)], dev, B_READ, minphys, uio)); | |
462 | } | |
463 | ||
464 | mtwrite(dev, uio) | |
465 | dev_t dev; | |
466 | struct uio *uio; | |
467 | { | |
468 | int errno; | |
469 | ||
470 | errno = mtphys(dev, uio); | |
471 | if (errno) | |
472 | return (errno); | |
473 | return (physio(mtstrategy, &rmtbuf[MTUNIT(dev)], dev, B_WRITE, minphys, uio)); | |
474 | } | |
475 | ||
476 | mtphys(dev, uio) | |
477 | dev_t dev; | |
478 | struct uio *uio; | |
479 | { | |
480 | register int mtunit; | |
481 | register struct mu_softc *sc; | |
482 | register struct mba_device *mi; | |
483 | daddr_t a; | |
484 | ||
485 | mtunit = MTUNIT(dev); | |
486 | if (mtunit >= NMT || (mi = mtinfo[mtunit]) == 0 || mi->mi_alive == 0) | |
487 | return (ENXIO); | |
488 | a = uio->uio_offset >> 9; | |
489 | sc = &mu_softc[MUUNIT(dev)]; | |
490 | sc->sc_blkno = bdbtofsb(a); | |
491 | sc->sc_nxrec = bdbtofsb(a)+1; | |
492 | return (0); | |
493 | } | |
494 | ||
495 | /*ARGSUSED*/ | |
496 | mtioctl(dev, cmd, data, flag) | |
497 | dev_t dev; | |
498 | int cmd; | |
499 | caddr_t data; | |
500 | int flag; | |
501 | { | |
502 | register struct mu_softc *sc = &mu_softc[MUUNIT(dev)]; | |
503 | register struct buf *bp = &cmtbuf[MTUNIT(dev)]; | |
504 | register callcount; | |
505 | register int op; | |
506 | int fcount; | |
507 | struct mtop *mtop; | |
508 | struct mtget *mtget; | |
509 | /* we depend of the values and order of the MT codes here */ | |
510 | static mtops[] = | |
511 | {MT_WTM,MT_SFORWF,MT_SREVF,MT_SFORW,MT_SREV,MT_REW,MT_UNLOAD,MT_SENSE}; | |
512 | ||
513 | switch (cmd) { | |
514 | ||
515 | case MTIOCTOP: /* tape operation */ | |
516 | mtop = (struct mtop *)data; | |
517 | switch (mtop->mt_op) { | |
518 | ||
519 | case MTWEOF: | |
520 | callcount = mtop->mt_count; | |
521 | fcount = 1; | |
522 | break; | |
523 | ||
524 | case MTFSF: case MTBSF: | |
525 | callcount = mtop->mt_count; | |
526 | fcount = 1; | |
527 | break; | |
528 | ||
529 | case MTFSR: case MTBSR: | |
530 | callcount = 1; | |
531 | fcount = mtop->mt_count; | |
532 | break; | |
533 | ||
534 | case MTREW: case MTOFFL: | |
535 | callcount = 1; | |
536 | fcount = 1; | |
537 | break; | |
538 | ||
539 | default: | |
540 | return (ENXIO); | |
541 | } | |
542 | if (callcount <= 0 || fcount <= 0) | |
543 | return (EINVAL); | |
544 | op = mtops[mtop->mt_op]; | |
545 | if (op == MT_WTM) | |
546 | op |= sc->sc_dens; | |
547 | while (--callcount >= 0) { | |
548 | register int n; | |
549 | ||
550 | do { | |
551 | n = MIN(fcount, 0xff); | |
552 | mtcommand(dev, op, n); | |
553 | fcount -= n; | |
554 | } while (fcount); | |
555 | if ((mtop->mt_op == MTFSR || mtop->mt_op == MTBSR) && | |
556 | bp->b_resid) | |
557 | return (EIO); | |
558 | if (bp->b_flags&B_ERROR) | |
559 | break; | |
560 | } | |
561 | return (geterror(bp)); | |
562 | ||
563 | case MTIOCGET: | |
564 | mtget = (struct mtget *)data; | |
565 | mtget->mt_erreg = sc->sc_erreg; | |
566 | mtget->mt_resid = sc->sc_resid; | |
567 | mtcommand(dev, MT_SENSE, 1); /* update drive status */ | |
568 | mtget->mt_dsreg = sc->sc_dsreg; | |
569 | mtget->mt_type = MT_ISMT; | |
570 | break; | |
571 | ||
572 | default: | |
573 | return (ENXIO); | |
574 | } | |
575 | return (0); | |
576 | } | |
577 | ||
578 | #define DBSIZE 20 | |
579 | ||
580 | mtdump() | |
581 | { | |
582 | register struct mba_device *mi; | |
583 | register struct mba_regs *mp; | |
584 | int blk, num; | |
585 | int start; | |
586 | ||
587 | start = 0; | |
588 | num = maxfree; | |
589 | #define phys(a,b) ((b)((int)(a)&0x7fffffff)) | |
590 | if (mtinfo[0] == 0) | |
591 | return (ENXIO); | |
592 | mi = phys(mtinfo[0], struct mba_device *); | |
593 | mp = phys(mi->mi_hd, struct mba_hd *)->mh_physmba; | |
594 | mp->mba_cr = MBCR_IE; | |
595 | #if lint | |
596 | blk = 0; num = blk; start = num; blk = start; | |
597 | return (0); | |
598 | #endif | |
599 | #ifdef notyet | |
600 | mtaddr = (struct mtdevice *)&mp->mba_drv[mi->mi_drive]; | |
601 | mtaddr->mttc = MTTC_PDP11|MTTC_1600BPI; | |
602 | mtaddr->mtcs1 = MT_DCLR|MT_GO; | |
603 | while (num > 0) { | |
604 | blk = num > DBSIZE ? DBSIZE : num; | |
605 | mtdwrite(start, blk, mtaddr, mp); | |
606 | start += blk; | |
607 | num -= blk; | |
608 | } | |
609 | mteof(mtaddr); | |
610 | mteof(mtaddr); | |
611 | mtwait(mtaddr); | |
612 | if (mtaddr->mtds&MTDS_ERR) | |
613 | return (EIO); | |
614 | mtaddr->mtcs1 = MT_REW|MT_GO; | |
615 | return (0); | |
616 | } | |
617 | ||
618 | mtdwrite(dbuf, num, mtaddr, mp) | |
619 | register dbuf, num; | |
620 | register struct mtdevice *mtaddr; | |
621 | struct mba_regs *mp; | |
622 | { | |
623 | register struct pte *io; | |
624 | register int i; | |
625 | ||
626 | mtwait(mtaddr); | |
627 | io = mp->mba_map; | |
628 | for (i = 0; i < num; i++) | |
629 | *(int *)io++ = dbuf++ | PG_V; | |
630 | mtaddr->mtfc = -(num*NBPG); | |
631 | mp->mba_sr = -1; | |
632 | mp->mba_bcr = -(num*NBPG); | |
633 | mp->mba_var = 0; | |
634 | mtaddr->mtcs1 = MT_WCOM|MT_GO; | |
635 | } | |
636 | ||
637 | mtwait(mtaddr) | |
638 | struct mtdevice *mtaddr; | |
639 | { | |
640 | register s; | |
641 | ||
642 | do | |
643 | s = mtaddr->mtds; | |
644 | while ((s & MTDS_DRY) == 0); | |
645 | } | |
646 | ||
647 | mteof(mtaddr) | |
648 | struct mtdevice *mtaddr; | |
649 | { | |
650 | ||
651 | mtwait(mtaddr); | |
652 | mtaddr->mtcs1 = MT_WEOF|MT_GO; | |
653 | #endif notyet | |
654 | } | |
655 | #endif |