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83d7e407 BJ |
1 | /* mt.c 4.1 81/11/04 */ |
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 "../h/param.h" | |
16 | #include "../h/systm.h" | |
17 | #include "../h/buf.h" | |
18 | #include "../h/conf.h" | |
19 | #include "../h/dir.h" | |
20 | #include "../h/file.h" | |
21 | #include "../h/user.h" | |
22 | #include "../h/map.h" | |
23 | #include "../h/pte.h" | |
24 | #include "../h/mbareg.h" | |
25 | #include "../h/mbavar.h" | |
26 | #include "../h/mtio.h" | |
27 | #include "../h/ioctl.h" | |
28 | #include "../h/cmap.h" | |
29 | #include "../h/cpu.h" | |
30 | ||
31 | #include "../h/mtreg.h" | |
32 | ||
33 | struct buf rmtbuf[NMT]; | |
34 | struct buf cmtbuf[NMT]; | |
35 | ||
36 | short mttypes[] = | |
37 | { MBDT_TU78, 0 }; | |
38 | struct mba_device *mtinfo[NMT]; | |
39 | int mtattach(), mtslave(), mtustart(), mtstart(), mtndtint(), mtdtint(); | |
40 | struct mba_driver mtdriver = | |
41 | { mtattach, mtslave, mtustart, mtstart, mtdtint, mtndtint, | |
42 | mttypes, "mt", "mu", mtinfo }; | |
43 | ||
44 | #define MASKREG(r) ((r) & 0xffff) | |
45 | ||
46 | /* bits in minor device */ | |
47 | #define MUUNIT(dev) (minor(dev)&03) | |
48 | #define H_NOREWIND 04 | |
49 | #define H_6250BPI 08 | |
50 | ||
51 | #define MTUNIT(dev) (mutomt[MUUNIT(dev)]) | |
52 | ||
53 | #define INF (daddr_t)1000000L /* a block number that wont exist */ | |
54 | ||
55 | struct mu_softc { | |
56 | char sc_openf; | |
57 | char sc_flags; | |
58 | daddr_t sc_blkno; | |
59 | daddr_t sc_nxrec; | |
60 | u_short sc_erreg; | |
61 | u_short sc_dsreg; | |
62 | short sc_resid; | |
63 | short sc_dens; | |
64 | struct mba_device *sc_mi; | |
65 | int sc_slave; | |
66 | } mu_softc[NMU]; | |
67 | short mutomt[NMU]; | |
68 | ||
69 | /* | |
70 | * Bits for sc_flags. | |
71 | */ | |
72 | #define H_WRITTEN 1 /* last operation was a write */ | |
73 | ||
74 | char mtds_bits[] = MTDS_BITS; | |
75 | ||
76 | /*ARGSUSED*/ | |
77 | mtattach(mi) | |
78 | struct mba_device *mi; | |
79 | { | |
80 | ||
81 | } | |
82 | ||
83 | mtslave(mi, ms) | |
84 | struct mba_device *mi; | |
85 | struct mba_slave *ms; | |
86 | { | |
87 | register struct mu_softc *sc = &mu_softc[ms->ms_unit]; | |
88 | register struct mtdevice *mtaddr = (struct mtdevice *)mi->mi_drv; | |
89 | int s = spl7(), rtn = 0; | |
90 | ||
91 | mtaddr->mtas = -1; | |
92 | mtaddr->mtncs[ms->ms_slave] = MT_SENSE|MT_GO; | |
93 | while (mtaddr->mtas == 0) | |
94 | ; | |
95 | if ((mtaddr->mtner & MTER_INTCODE) == MTER_DONE && | |
96 | (mtaddr->mtds & MTDS_PRES)) { | |
97 | sc->sc_mi = mi; | |
98 | sc->sc_slave = ms->ms_slave; | |
99 | mutomt[ms->ms_unit] = mi->mi_unit; | |
100 | rtn = 1; | |
101 | } | |
102 | mtaddr->mtas = mtaddr->mtas; | |
103 | splx(s); | |
104 | return (rtn); | |
105 | } | |
106 | ||
107 | mtopen(dev, flag) | |
108 | dev_t dev; | |
109 | int flag; | |
110 | { | |
111 | register int muunit; | |
112 | register struct mba_device *mi; | |
113 | register struct mu_softc *sc; | |
114 | int olddens, dens; | |
115 | ||
116 | muunit = MUUNIT(dev); | |
117 | if (muunit >= NMU || (sc = &mu_softc[muunit])->sc_openf || | |
118 | (mi = mtinfo[MTUNIT(dev)]) == 0 || mi->mi_alive == 0) { | |
119 | u.u_error = ENXIO; | |
120 | return; | |
121 | } | |
122 | olddens = sc->sc_dens; | |
123 | dens = sc->sc_dens = (minor(dev)&H_6250BPI) ? MT_GCR : 0; | |
124 | mtcommand(dev, MT_SENSE, 1); | |
125 | sc->sc_dens = olddens; | |
126 | if ((sc->sc_dsreg & MTDS_ONL) == 0) { | |
127 | uprintf("mu%d: not online\n", muunit); | |
128 | u.u_error = EIO; | |
129 | return; | |
130 | } | |
131 | if ((flag&FWRITE) && (sc->sc_dsreg&MTDS_FPT)) { | |
132 | uprintf("mu%d: no write ring\n", muunit); | |
133 | u.u_error = EIO; | |
134 | return; | |
135 | } | |
136 | if ((sc->sc_dsreg & MTDS_BOT) == 0 && (flag&FWRITE) && | |
137 | dens != sc->sc_dens) { | |
138 | uprintf("mu%d: can't change density in mid-tape\n", muunit); | |
139 | u.u_error = EIO; | |
140 | return; | |
141 | } | |
142 | sc->sc_openf = 1; | |
143 | sc->sc_blkno = (daddr_t)0; | |
144 | sc->sc_nxrec = INF; | |
145 | sc->sc_flags = 0; | |
146 | sc->sc_dens = dens; | |
147 | } | |
148 | ||
149 | mtclose(dev, flag) | |
150 | register dev_t dev; | |
151 | register flag; | |
152 | { | |
153 | register struct mu_softc *sc = &mu_softc[MUUNIT(dev)]; | |
154 | ||
155 | if (flag == FWRITE || ((flag&FWRITE) && (sc->sc_flags&H_WRITTEN))) | |
156 | mtcommand(dev, MT_CLS|sc->sc_dens, 1); | |
157 | if ((minor(dev)&H_NOREWIND) == 0) | |
158 | mtcommand(dev, MT_REW, 0); | |
159 | sc->sc_openf = 0; | |
160 | } | |
161 | ||
162 | mtcommand(dev, com, count) | |
163 | dev_t dev; | |
164 | int com, count; | |
165 | { | |
166 | register struct buf *bp; | |
167 | ||
168 | bp = &cmtbuf[MTUNIT(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 | 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 | ||
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 | mtustart(mi) | |
211 | register struct mba_device *mi; | |
212 | { | |
213 | register struct mtdevice *mtaddr = | |
214 | (struct mtdevice *)mi->mi_drv; | |
215 | register struct buf *bp = mi->mi_tab.b_actf; | |
216 | register struct mu_softc *sc = &mu_softc[MUUNIT(bp->b_dev)]; | |
217 | daddr_t blkno; | |
218 | ||
219 | sc->sc_flags &= ~H_WRITTEN; | |
220 | if (sc->sc_openf < 0) { | |
221 | bp->b_flags |= B_ERROR; | |
222 | return (MBU_NEXT); | |
223 | } | |
224 | if (bp != &cmtbuf[MTUNIT(bp->b_dev)]) { | |
225 | if (dbtofsb(bp->b_blkno) > sc->sc_nxrec) { | |
226 | bp->b_flags |= B_ERROR; | |
227 | bp->b_error = ENXIO; | |
228 | return (MBU_NEXT); | |
229 | } | |
230 | if (dbtofsb(bp->b_blkno) == sc->sc_nxrec && | |
231 | bp->b_flags&B_READ) { | |
232 | bp->b_resid = bp->b_bcount; | |
233 | clrbuf(bp); | |
234 | return (MBU_NEXT); | |
235 | } | |
236 | if ((bp->b_flags&B_READ)==0) | |
237 | sc->sc_nxrec = dbtofsb(bp->b_blkno) + 1; | |
238 | } else { | |
239 | mtaddr->mtncs[MUUNIT(bp->b_dev)] = | |
240 | (bp->b_repcnt<<8)|bp->b_command|MT_GO; | |
241 | return (MBU_STARTED); | |
242 | } | |
243 | if ((blkno = sc->sc_blkno) == dbtofsb(bp->b_blkno)) { | |
244 | if (mi->mi_tab.b_errcnt == 2) { | |
245 | mtaddr->mtca = MUUNIT(bp->b_dev); | |
246 | } else { | |
247 | mtaddr->mtbc = bp->b_bcount; | |
248 | mtaddr->mtca = (1<<2)|MUUNIT(bp->b_dev); | |
249 | } | |
250 | return (MBU_DODATA); | |
251 | } | |
252 | if (blkno < dbtofsb(bp->b_blkno)) | |
253 | mtaddr->mtncs[MUUNIT(bp->b_dev)] = | |
254 | (min(dbtofsb(bp->b_blkno) - blkno, 0377)<<8)| MT_SFORW|MT_GO; | |
255 | else | |
256 | mtaddr->mtncs[MUUNIT(bp->b_dev)] = | |
257 | (min(blkno - dbtofsb(bp->b_blkno), 0377)<<8)| MT_SREV|MT_GO; | |
258 | return (MBU_STARTED); | |
259 | } | |
260 | ||
261 | mtstart(mi) | |
262 | register struct mba_device *mi; | |
263 | { | |
264 | register struct buf *bp = mi->mi_tab.b_actf; | |
265 | register struct mu_softc *sc = &mu_softc[MUUNIT(bp->b_dev)]; | |
266 | ||
267 | if (bp->b_flags & B_READ) | |
268 | if (mi->mi_tab.b_errcnt == 2) | |
269 | return(MT_READREV|MT_GO); | |
270 | else | |
271 | return(MT_READ|MT_GO); | |
272 | else | |
273 | return(MT_WRITE|sc->sc_dens|MT_GO); | |
274 | } | |
275 | ||
276 | mtdtint(mi, mbsr) | |
277 | register struct mba_device *mi; | |
278 | int mbsr; | |
279 | { | |
280 | register struct mtdevice *mtaddr = (struct mtdevice *)mi->mi_drv; | |
281 | register struct buf *bp = mi->mi_tab.b_actf; | |
282 | register struct mu_softc *sc; | |
283 | ||
284 | /* I'M NOT SURE IF THIS SHOULD ALWAYS BE THE CASE SO FOR NOW... */ | |
285 | if ((mtaddr->mtca&3) != MUUNIT(bp->b_dev)) { | |
286 | printf("mt: wrong unit!\n"); | |
287 | mtaddr->mtca = MUUNIT(bp->b_dev); | |
288 | } | |
289 | sc = &mu_softc[MUUNIT(bp->b_dev)]; | |
290 | sc->sc_erreg = mtaddr->mter; | |
291 | if((bp->b_flags & B_READ) == 0) | |
292 | sc->sc_flags |= H_WRITTEN; | |
293 | switch (sc->sc_erreg & MTER_INTCODE) { | |
294 | case MTER_DONE: | |
295 | case MTER_LONGREC: | |
296 | if (mi->mi_tab.b_errcnt != 2) | |
297 | sc->sc_blkno++; | |
298 | bp->b_resid = 0; | |
299 | break; | |
300 | ||
301 | case MTER_NOTCAP: | |
302 | printf("mu%d: blank tape\n", MUUNIT(bp->b_dev)); | |
303 | goto err; | |
304 | ||
305 | case MTER_TM: | |
306 | case MTER_EOT: | |
307 | sc->sc_blkno++; | |
308 | err: | |
309 | bp->b_resid = bp->b_bcount; | |
310 | sc->sc_nxrec = dbtofsb(bp->b_blkno); | |
311 | break; | |
312 | ||
313 | case MTER_SHRTREC: | |
314 | sc->sc_blkno++; | |
315 | if (bp != &rmtbuf[MTUNIT(bp->b_dev)]) | |
316 | bp->b_flags |= B_ERROR; | |
317 | if (mi->mi_tab.b_errcnt == 2) | |
318 | bp->b_bcount = bp->b_resid; /* restore saved value */ | |
319 | bp->b_resid = bp->b_bcount - mtaddr->mtbc; | |
320 | break; | |
321 | ||
322 | case MTER_RDOPP: | |
323 | mi->mi_tab.b_errcnt = 2; /* indicate "read opposite" */ | |
324 | bp->b_resid = bp->b_bcount; /* save it */ | |
325 | bp->b_bcount = mtaddr->mtbc; /* use this instead */ | |
326 | return(MBD_RETRY); | |
327 | ||
328 | case MTER_RETRY: | |
329 | mi->mi_tab.b_errcnt = 1; /* indicate simple retry */ | |
330 | return(MBD_RETRY); | |
331 | ||
332 | case MTER_OFFLINE: | |
333 | if (sc->sc_openf > 0) { | |
334 | sc->sc_openf = -1; | |
335 | printf("mu%d: offline\n", MUUNIT(bp->b_dev)); | |
336 | } | |
337 | bp->b_flags |= B_ERROR; | |
338 | break; | |
339 | ||
340 | case MTER_FPT: | |
341 | printf("mu%d: no write ring\n", MUUNIT(bp->b_dev)); | |
342 | bp->b_flags |= B_ERROR; | |
343 | break; | |
344 | ||
345 | default: | |
346 | printf("mu%d: hard error bn%d mbsr=%b er=%x ds=%b\n", | |
347 | MUUNIT(bp->b_dev), bp->b_blkno, | |
348 | mbsr, mbsr_bits, sc->sc_erreg, | |
349 | sc->sc_dsreg, mtds_bits); | |
350 | bp->b_flags |= B_ERROR; | |
351 | mtaddr->mtid = MTID_CLR; /* reset the TM78 */ | |
352 | DELAY(250); | |
353 | while ((mtaddr->mtid & MTID_RDY) == 0) /* wait for it */ | |
354 | ; | |
355 | return (MBD_DONE); | |
356 | } | |
357 | /* CHECK FOR MBA ERROR WHEN NO OTHER ERROR INDICATED? */ | |
358 | return (MBD_DONE); | |
359 | } | |
360 | ||
361 | mtndtint(mi) | |
362 | register struct mba_device *mi; | |
363 | { | |
364 | register struct mtdevice *mtaddr = (struct mtdevice *)mi->mi_drv; | |
365 | register struct buf *bp = mi->mi_tab.b_actf; | |
366 | register struct mu_softc *sc; | |
367 | int er, fc, unit; | |
368 | ||
369 | unit = (mtaddr->mtner >> 8) & 3; | |
370 | er = MASKREG(mtaddr->mtner); | |
371 | /* WILL THIS OCCUR IF ANOTHER DRIVE COMES ONLINE? */ | |
372 | if (bp == 0 || unit != MUUNIT(bp->b_dev)) { /* consistency check */ | |
373 | if ((er & MTER_INTCODE) != MTER_ONLINE) | |
374 | printf("mt: unit %d random interrupt\n", unit); | |
375 | return (MBN_SKIP); | |
376 | } | |
377 | if (bp == 0) | |
378 | return (MBN_SKIP); | |
379 | fc = (mtaddr->mtncs[unit] >> 8) & 0xff; | |
380 | sc = &mu_softc[unit]; | |
381 | sc->sc_erreg = er; | |
382 | sc->sc_resid = fc; | |
383 | switch (er & MTER_INTCODE) { | |
384 | case MTER_DONE: | |
385 | if (bp == &cmtbuf[MTUNIT(bp->b_dev)]) { | |
386 | done: | |
387 | if (bp->b_command == MT_SENSE) | |
388 | sc->sc_dsreg = MASKREG(mtaddr->mtds); | |
389 | bp->b_resid = fc; | |
390 | return (MBN_DONE); | |
391 | } | |
392 | /* this is UGLY! (but is it correct?) */ | |
393 | if ((fc = dbtofsb(bp->b_blkno) - sc->sc_blkno) < 0) | |
394 | sc->sc_blkno -= min(0377, -fc); | |
395 | else | |
396 | sc->sc_blkno += min(0377, fc); | |
397 | return (MBN_RETRY); | |
398 | ||
399 | case MTER_RWDING: | |
400 | return (MBN_SKIP); /* ignore "rewind started" interrupt */ | |
401 | ||
402 | case MTER_NOTCAP: | |
403 | printf("mu%d: blank tape\n", MUUNIT(bp->b_dev)); | |
404 | ||
405 | case MTER_TM: | |
406 | case MTER_EOT: | |
407 | case MTER_LEOT: | |
408 | if (sc->sc_blkno > dbtofsb(bp->b_blkno)) { | |
409 | sc->sc_nxrec = dbtofsb(bp->b_blkno) + fc; | |
410 | sc->sc_blkno = sc->sc_nxrec; | |
411 | } else { | |
412 | sc->sc_blkno = dbtofsb(bp->b_blkno) - fc; | |
413 | sc->sc_nxrec = sc->sc_blkno - 1; | |
414 | } | |
415 | return (MBN_RETRY); | |
416 | ||
417 | case MTER_FPT: | |
418 | printf("mu%d: no write ring\n", MUUNIT(bp->b_dev)); | |
419 | bp->b_flags |= B_ERROR; | |
420 | return (MBN_DONE); | |
421 | ||
422 | case MTER_OFFLINE: | |
423 | if (sc->sc_openf > 0) { | |
424 | sc->sc_openf = -1; | |
425 | printf("mu%d: offline\n", MUUNIT(bp->b_dev)); | |
426 | } | |
427 | bp->b_flags |= B_ERROR; | |
428 | return (MBN_DONE); | |
429 | ||
430 | case MTER_BOT: | |
431 | if (bp == &cmtbuf[MTUNIT(bp->b_dev)]) | |
432 | goto done; | |
433 | /* FALL THROUGH */ | |
434 | ||
435 | default: | |
436 | printf("mu%d: hard error bn%d er=%o ds=%b\n", | |
437 | MUUNIT(bp->b_dev), bp->b_blkno, | |
438 | sc->sc_erreg, sc->sc_dsreg, mtds_bits); | |
439 | mtaddr->mtid = MTID_CLR; /* reset the TM78 */ | |
440 | DELAY(250); | |
441 | while ((mtaddr->mtid & MTID_RDY) == 0) /* wait for it */ | |
442 | ; | |
443 | bp->b_flags |= B_ERROR; | |
444 | return (MBN_DONE); | |
445 | } | |
446 | /* NOTREACHED */ | |
447 | } | |
448 | ||
449 | mtread(dev) | |
450 | dev_t dev; | |
451 | { | |
452 | ||
453 | mtphys(dev); | |
454 | if (u.u_error) | |
455 | return; | |
456 | physio(mtstrategy, &rmtbuf[MTUNIT(dev)], dev, B_READ, minphys); | |
457 | } | |
458 | ||
459 | mtwrite(dev) | |
460 | { | |
461 | ||
462 | mtphys(dev); | |
463 | if (u.u_error) | |
464 | return; | |
465 | physio(mtstrategy, &rmtbuf[MTUNIT(dev)], dev, B_WRITE, minphys); | |
466 | } | |
467 | ||
468 | mtphys(dev) | |
469 | dev_t dev; | |
470 | { | |
471 | register int mtunit; | |
472 | register struct mu_softc *sc; | |
473 | register struct mba_device *mi; | |
474 | daddr_t a; | |
475 | ||
476 | mtunit = MTUNIT(dev); | |
477 | if (mtunit >= NMT || (mi = mtinfo[mtunit]) == 0 || mi->mi_alive == 0) { | |
478 | u.u_error = ENXIO; | |
479 | return; | |
480 | } | |
481 | a = u.u_offset >> 9; | |
482 | sc = &mu_softc[MUUNIT(dev)]; | |
483 | sc->sc_blkno = dbtofsb(a); | |
484 | sc->sc_nxrec = dbtofsb(a)+1; | |
485 | } | |
486 | ||
487 | /*ARGSUSED*/ | |
488 | mtioctl(dev, cmd, addr, flag) | |
489 | dev_t dev; | |
490 | int cmd; | |
491 | caddr_t addr; | |
492 | int flag; | |
493 | { | |
494 | register struct mu_softc *sc = &mu_softc[MUUNIT(dev)]; | |
495 | register struct buf *bp = &cmtbuf[MTUNIT(dev)]; | |
496 | register callcount; | |
497 | register int n, op; | |
498 | int fcount; | |
499 | struct mtop mtop; | |
500 | struct mtget mtget; | |
501 | /* we depend of the values and order of the MT codes here */ | |
502 | static mtops[] = | |
503 | {MT_WTM,MT_SFORWF,MT_SREVF,MT_SFORW,MT_SREV,MT_REW,MT_UNLOAD,MT_SENSE}; | |
504 | ||
505 | switch (cmd) { | |
506 | case MTIOCTOP: /* tape operation */ | |
507 | if (copyin((caddr_t)addr, (caddr_t)&mtop, sizeof(mtop))) { | |
508 | u.u_error = EFAULT; | |
509 | return; | |
510 | } | |
511 | switch(mtop.mt_op) { | |
512 | case MTWEOF: | |
513 | callcount = mtop.mt_count; | |
514 | fcount = 1; | |
515 | break; | |
516 | case MTFSF: case MTBSF: | |
517 | callcount = mtop.mt_count; | |
518 | fcount = 1; | |
519 | break; | |
520 | case MTFSR: case MTBSR: | |
521 | callcount = 1; | |
522 | fcount = mtop.mt_count; | |
523 | break; | |
524 | case MTREW: case MTOFFL: | |
525 | callcount = 1; | |
526 | fcount = 1; | |
527 | break; | |
528 | default: | |
529 | u.u_error = ENXIO; | |
530 | return; | |
531 | } | |
532 | if (callcount <= 0 || fcount <= 0) { | |
533 | u.u_error = ENXIO; | |
534 | return; | |
535 | } | |
536 | op = mtops[mtop.mt_op]; | |
537 | if (op == MT_WTM) | |
538 | op |= sc->sc_dens; | |
539 | while (--callcount >= 0) { | |
540 | register int n; | |
541 | ||
542 | do { | |
543 | n = min(fcount, 0xff); | |
544 | mtcommand(dev, op, n); | |
545 | fcount -= n; | |
546 | } while (fcount); | |
547 | if ((mtop.mt_op == MTFSR || mtop.mt_op == MTBSR) && | |
548 | bp->b_resid) { | |
549 | u.u_error = EIO; | |
550 | break; | |
551 | } | |
552 | if (bp->b_flags&B_ERROR) | |
553 | break; | |
554 | } | |
555 | geterror(bp); | |
556 | return; | |
557 | case MTIOCGET: | |
558 | mtget.mt_erreg = sc->sc_erreg; | |
559 | mtget.mt_resid = sc->sc_resid; | |
560 | mtcommand(dev, MT_SENSE, 1); /* update drive status */ | |
561 | mtget.mt_dsreg = sc->sc_dsreg; | |
562 | mtget.mt_type = MT_ISMT; | |
563 | if (copyout((caddr_t)&mtget, addr, sizeof(mtget))) | |
564 | u.u_error = EFAULT; | |
565 | return; | |
566 | default: | |
567 | u.u_error = ENXIO; | |
568 | } | |
569 | } | |
570 | ||
571 | #define DBSIZE 20 | |
572 | ||
573 | mtdump() | |
574 | { | |
575 | register struct mba_device *mi; | |
576 | register struct mba_regs *mp; | |
577 | register struct mtdevice *mtaddr; | |
578 | int blk, num; | |
579 | int start; | |
580 | ||
581 | start = 0; | |
582 | num = maxfree; | |
583 | #define phys(a,b) ((b)((int)(a)&0x7fffffff)) | |
584 | if (mtinfo[0] == 0) | |
585 | return (ENXIO); | |
586 | mi = phys(mtinfo[0], struct mba_device *); | |
587 | mp = phys(mi->mi_hd, struct mba_hd *)->mh_physmba; | |
588 | mp->mba_cr = MBCR_IE; | |
589 | mtaddr = (struct mtdevice *)&mp->mba_drv[mi->mi_drive]; | |
590 | #ifdef notyet | |
591 | mtaddr->mttc = MTTC_PDP11|MTTC_1600BPI; | |
592 | mtaddr->mtcs1 = MT_DCLR|MT_GO; | |
593 | while (num > 0) { | |
594 | blk = num > DBSIZE ? DBSIZE : num; | |
595 | mtdwrite(start, blk, mtaddr, mp); | |
596 | start += blk; | |
597 | num -= blk; | |
598 | } | |
599 | mteof(mtaddr); | |
600 | mteof(mtaddr); | |
601 | mtwait(mtaddr); | |
602 | if (mtaddr->mtds&MTDS_ERR) | |
603 | return (EIO); | |
604 | mtaddr->mtcs1 = MT_REW|MT_GO; | |
605 | return (0); | |
606 | } | |
607 | ||
608 | mtdwrite(dbuf, num, mtaddr, mp) | |
609 | register dbuf, num; | |
610 | register struct mtdevice *mtaddr; | |
611 | struct mba_regs *mp; | |
612 | { | |
613 | register struct pte *io; | |
614 | register int i; | |
615 | ||
616 | mtwait(mtaddr); | |
617 | io = mp->mba_map; | |
618 | for (i = 0; i < num; i++) | |
619 | *(int *)io++ = dbuf++ | PG_V; | |
620 | mtaddr->mtfc = -(num*NBPG); | |
621 | mp->mba_sr = -1; | |
622 | mp->mba_bcr = -(num*NBPG); | |
623 | mp->mba_var = 0; | |
624 | mtaddr->mtcs1 = MT_WCOM|MT_GO; | |
625 | } | |
626 | ||
627 | mtwait(mtaddr) | |
628 | struct mtdevice *mtaddr; | |
629 | { | |
630 | register s; | |
631 | ||
632 | do | |
633 | s = mtaddr->mtds; | |
634 | while ((s & MTDS_DRY) == 0); | |
635 | } | |
636 | ||
637 | mteof(mtaddr) | |
638 | struct mtdevice *mtaddr; | |
639 | { | |
640 | ||
641 | mtwait(mtaddr); | |
642 | mtaddr->mtcs1 = MT_WEOF|MT_GO; | |
643 | #endif notyet | |
644 | } | |
645 | #endif |