Commit | Line | Data |
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155d9ff0 | 1 | /* mt.c 4.3 82/03/14 */ |
83d7e407 BJ |
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 | { | |
155d9ff0 SL |
80 | #ifdef lint |
81 | mtread(0); mtwrite(0); mtioctl(0, 0, 0, 0); | |
82 | #endif | |
83d7e407 BJ |
83 | } |
84 | ||
85 | mtslave(mi, ms) | |
86 | struct mba_device *mi; | |
87 | struct mba_slave *ms; | |
88 | { | |
89 | register struct mu_softc *sc = &mu_softc[ms->ms_unit]; | |
90 | register struct mtdevice *mtaddr = (struct mtdevice *)mi->mi_drv; | |
91 | int s = spl7(), rtn = 0; | |
92 | ||
93 | mtaddr->mtas = -1; | |
94 | mtaddr->mtncs[ms->ms_slave] = MT_SENSE|MT_GO; | |
95 | while (mtaddr->mtas == 0) | |
96 | ; | |
97 | if ((mtaddr->mtner & MTER_INTCODE) == MTER_DONE && | |
98 | (mtaddr->mtds & MTDS_PRES)) { | |
99 | sc->sc_mi = mi; | |
100 | sc->sc_slave = ms->ms_slave; | |
101 | mutomt[ms->ms_unit] = mi->mi_unit; | |
102 | rtn = 1; | |
103 | } | |
104 | mtaddr->mtas = mtaddr->mtas; | |
105 | splx(s); | |
106 | return (rtn); | |
107 | } | |
108 | ||
109 | mtopen(dev, flag) | |
110 | dev_t dev; | |
111 | int flag; | |
112 | { | |
113 | register int muunit; | |
114 | register struct mba_device *mi; | |
115 | register struct mu_softc *sc; | |
116 | int olddens, dens; | |
117 | ||
118 | muunit = MUUNIT(dev); | |
119 | if (muunit >= NMU || (sc = &mu_softc[muunit])->sc_openf || | |
120 | (mi = mtinfo[MTUNIT(dev)]) == 0 || mi->mi_alive == 0) { | |
121 | u.u_error = ENXIO; | |
122 | return; | |
123 | } | |
124 | olddens = sc->sc_dens; | |
125 | dens = sc->sc_dens = (minor(dev)&H_6250BPI) ? MT_GCR : 0; | |
126 | mtcommand(dev, MT_SENSE, 1); | |
127 | sc->sc_dens = olddens; | |
128 | if ((sc->sc_dsreg & MTDS_ONL) == 0) { | |
129 | uprintf("mu%d: not online\n", muunit); | |
130 | u.u_error = EIO; | |
131 | return; | |
132 | } | |
133 | if ((flag&FWRITE) && (sc->sc_dsreg&MTDS_FPT)) { | |
134 | uprintf("mu%d: no write ring\n", muunit); | |
135 | u.u_error = EIO; | |
136 | return; | |
137 | } | |
138 | if ((sc->sc_dsreg & MTDS_BOT) == 0 && (flag&FWRITE) && | |
139 | dens != sc->sc_dens) { | |
140 | uprintf("mu%d: can't change density in mid-tape\n", muunit); | |
141 | u.u_error = EIO; | |
142 | return; | |
143 | } | |
144 | sc->sc_openf = 1; | |
145 | sc->sc_blkno = (daddr_t)0; | |
146 | sc->sc_nxrec = INF; | |
147 | sc->sc_flags = 0; | |
148 | sc->sc_dens = dens; | |
149 | } | |
150 | ||
151 | mtclose(dev, flag) | |
152 | register dev_t dev; | |
153 | register flag; | |
154 | { | |
155 | register struct mu_softc *sc = &mu_softc[MUUNIT(dev)]; | |
156 | ||
157 | if (flag == FWRITE || ((flag&FWRITE) && (sc->sc_flags&H_WRITTEN))) | |
158 | mtcommand(dev, MT_CLS|sc->sc_dens, 1); | |
159 | if ((minor(dev)&H_NOREWIND) == 0) | |
160 | mtcommand(dev, MT_REW, 0); | |
161 | sc->sc_openf = 0; | |
162 | } | |
163 | ||
164 | mtcommand(dev, com, count) | |
165 | dev_t dev; | |
166 | int com, count; | |
167 | { | |
168 | register struct buf *bp; | |
2311123d | 169 | register int s; |
83d7e407 BJ |
170 | |
171 | bp = &cmtbuf[MTUNIT(dev)]; | |
2311123d | 172 | s = spl5(); |
83d7e407 BJ |
173 | while (bp->b_flags&B_BUSY) { |
174 | if(bp->b_repcnt == 0 && (bp->b_flags&B_DONE)) | |
175 | break; | |
176 | bp->b_flags |= B_WANTED; | |
177 | sleep((caddr_t)bp, PRIBIO); | |
178 | } | |
179 | bp->b_flags = B_BUSY|B_READ; | |
2311123d | 180 | splx(s); |
83d7e407 BJ |
181 | bp->b_dev = dev; |
182 | bp->b_command = com; | |
183 | bp->b_repcnt = count; | |
184 | bp->b_blkno = 0; | |
185 | mtstrategy(bp); | |
186 | if (count == 0) | |
187 | return; | |
188 | iowait(bp); | |
189 | if (bp->b_flags&B_WANTED) | |
190 | wakeup((caddr_t)bp); | |
191 | bp->b_flags &= B_ERROR; | |
192 | } | |
193 | ||
194 | mtstrategy(bp) | |
195 | register struct buf *bp; | |
196 | { | |
197 | register struct mba_device *mi = mtinfo[MTUNIT(bp->b_dev)]; | |
198 | register struct buf *dp; | |
2311123d | 199 | register int s; |
83d7e407 BJ |
200 | |
201 | bp->av_forw = NULL; | |
202 | dp = &mi->mi_tab; | |
2311123d | 203 | s = spl5(); |
83d7e407 BJ |
204 | if (dp->b_actf == NULL) |
205 | dp->b_actf = bp; | |
206 | else | |
207 | dp->b_actl->av_forw = bp; | |
208 | dp->b_actl = bp; | |
209 | if (dp->b_active == 0) | |
210 | mbustart(mi); | |
2311123d | 211 | splx(s); |
83d7e407 BJ |
212 | } |
213 | ||
214 | mtustart(mi) | |
215 | register struct mba_device *mi; | |
216 | { | |
217 | register struct mtdevice *mtaddr = | |
218 | (struct mtdevice *)mi->mi_drv; | |
219 | register struct buf *bp = mi->mi_tab.b_actf; | |
220 | register struct mu_softc *sc = &mu_softc[MUUNIT(bp->b_dev)]; | |
221 | daddr_t blkno; | |
222 | ||
223 | sc->sc_flags &= ~H_WRITTEN; | |
224 | if (sc->sc_openf < 0) { | |
225 | bp->b_flags |= B_ERROR; | |
226 | return (MBU_NEXT); | |
227 | } | |
228 | if (bp != &cmtbuf[MTUNIT(bp->b_dev)]) { | |
229 | if (dbtofsb(bp->b_blkno) > sc->sc_nxrec) { | |
230 | bp->b_flags |= B_ERROR; | |
231 | bp->b_error = ENXIO; | |
232 | return (MBU_NEXT); | |
233 | } | |
234 | if (dbtofsb(bp->b_blkno) == sc->sc_nxrec && | |
235 | bp->b_flags&B_READ) { | |
236 | bp->b_resid = bp->b_bcount; | |
237 | clrbuf(bp); | |
238 | return (MBU_NEXT); | |
239 | } | |
240 | if ((bp->b_flags&B_READ)==0) | |
241 | sc->sc_nxrec = dbtofsb(bp->b_blkno) + 1; | |
242 | } else { | |
243 | mtaddr->mtncs[MUUNIT(bp->b_dev)] = | |
244 | (bp->b_repcnt<<8)|bp->b_command|MT_GO; | |
245 | return (MBU_STARTED); | |
246 | } | |
247 | if ((blkno = sc->sc_blkno) == dbtofsb(bp->b_blkno)) { | |
248 | if (mi->mi_tab.b_errcnt == 2) { | |
249 | mtaddr->mtca = MUUNIT(bp->b_dev); | |
250 | } else { | |
251 | mtaddr->mtbc = bp->b_bcount; | |
252 | mtaddr->mtca = (1<<2)|MUUNIT(bp->b_dev); | |
253 | } | |
254 | return (MBU_DODATA); | |
255 | } | |
256 | if (blkno < dbtofsb(bp->b_blkno)) | |
257 | mtaddr->mtncs[MUUNIT(bp->b_dev)] = | |
155d9ff0 SL |
258 | (min((unsigned)(dbtofsb(bp->b_blkno) - blkno), 0377) << 8) | |
259 | MT_SFORW|MT_GO; | |
83d7e407 BJ |
260 | else |
261 | mtaddr->mtncs[MUUNIT(bp->b_dev)] = | |
155d9ff0 SL |
262 | (min((unsigned)(blkno - dbtofsb(bp->b_blkno)), 0377) << 8) | |
263 | MT_SREV|MT_GO; | |
83d7e407 BJ |
264 | return (MBU_STARTED); |
265 | } | |
266 | ||
267 | mtstart(mi) | |
268 | register struct mba_device *mi; | |
269 | { | |
270 | register struct buf *bp = mi->mi_tab.b_actf; | |
271 | register struct mu_softc *sc = &mu_softc[MUUNIT(bp->b_dev)]; | |
272 | ||
273 | if (bp->b_flags & B_READ) | |
274 | if (mi->mi_tab.b_errcnt == 2) | |
275 | return(MT_READREV|MT_GO); | |
276 | else | |
277 | return(MT_READ|MT_GO); | |
278 | else | |
279 | return(MT_WRITE|sc->sc_dens|MT_GO); | |
280 | } | |
281 | ||
282 | mtdtint(mi, mbsr) | |
283 | register struct mba_device *mi; | |
284 | int mbsr; | |
285 | { | |
286 | register struct mtdevice *mtaddr = (struct mtdevice *)mi->mi_drv; | |
287 | register struct buf *bp = mi->mi_tab.b_actf; | |
288 | register struct mu_softc *sc; | |
289 | ||
290 | /* I'M NOT SURE IF THIS SHOULD ALWAYS BE THE CASE SO FOR NOW... */ | |
291 | if ((mtaddr->mtca&3) != MUUNIT(bp->b_dev)) { | |
292 | printf("mt: wrong unit!\n"); | |
293 | mtaddr->mtca = MUUNIT(bp->b_dev); | |
294 | } | |
295 | sc = &mu_softc[MUUNIT(bp->b_dev)]; | |
296 | sc->sc_erreg = mtaddr->mter; | |
297 | if((bp->b_flags & B_READ) == 0) | |
298 | sc->sc_flags |= H_WRITTEN; | |
299 | switch (sc->sc_erreg & MTER_INTCODE) { | |
300 | case MTER_DONE: | |
301 | case MTER_LONGREC: | |
302 | if (mi->mi_tab.b_errcnt != 2) | |
303 | sc->sc_blkno++; | |
304 | bp->b_resid = 0; | |
305 | break; | |
306 | ||
307 | case MTER_NOTCAP: | |
308 | printf("mu%d: blank tape\n", MUUNIT(bp->b_dev)); | |
309 | goto err; | |
310 | ||
311 | case MTER_TM: | |
312 | case MTER_EOT: | |
313 | sc->sc_blkno++; | |
314 | err: | |
315 | bp->b_resid = bp->b_bcount; | |
316 | sc->sc_nxrec = dbtofsb(bp->b_blkno); | |
317 | break; | |
318 | ||
319 | case MTER_SHRTREC: | |
320 | sc->sc_blkno++; | |
321 | if (bp != &rmtbuf[MTUNIT(bp->b_dev)]) | |
322 | bp->b_flags |= B_ERROR; | |
323 | if (mi->mi_tab.b_errcnt == 2) | |
324 | bp->b_bcount = bp->b_resid; /* restore saved value */ | |
325 | bp->b_resid = bp->b_bcount - mtaddr->mtbc; | |
326 | break; | |
327 | ||
328 | case MTER_RDOPP: | |
329 | mi->mi_tab.b_errcnt = 2; /* indicate "read opposite" */ | |
330 | bp->b_resid = bp->b_bcount; /* save it */ | |
331 | bp->b_bcount = mtaddr->mtbc; /* use this instead */ | |
332 | return(MBD_RETRY); | |
333 | ||
334 | case MTER_RETRY: | |
335 | mi->mi_tab.b_errcnt = 1; /* indicate simple retry */ | |
336 | return(MBD_RETRY); | |
337 | ||
338 | case MTER_OFFLINE: | |
339 | if (sc->sc_openf > 0) { | |
340 | sc->sc_openf = -1; | |
341 | printf("mu%d: offline\n", MUUNIT(bp->b_dev)); | |
342 | } | |
343 | bp->b_flags |= B_ERROR; | |
344 | break; | |
345 | ||
346 | case MTER_FPT: | |
347 | printf("mu%d: no write ring\n", MUUNIT(bp->b_dev)); | |
348 | bp->b_flags |= B_ERROR; | |
349 | break; | |
350 | ||
351 | default: | |
352 | printf("mu%d: hard error bn%d mbsr=%b er=%x ds=%b\n", | |
353 | MUUNIT(bp->b_dev), bp->b_blkno, | |
354 | mbsr, mbsr_bits, sc->sc_erreg, | |
355 | sc->sc_dsreg, mtds_bits); | |
356 | bp->b_flags |= B_ERROR; | |
357 | mtaddr->mtid = MTID_CLR; /* reset the TM78 */ | |
358 | DELAY(250); | |
359 | while ((mtaddr->mtid & MTID_RDY) == 0) /* wait for it */ | |
360 | ; | |
361 | return (MBD_DONE); | |
362 | } | |
363 | /* CHECK FOR MBA ERROR WHEN NO OTHER ERROR INDICATED? */ | |
364 | return (MBD_DONE); | |
365 | } | |
366 | ||
367 | mtndtint(mi) | |
368 | register struct mba_device *mi; | |
369 | { | |
370 | register struct mtdevice *mtaddr = (struct mtdevice *)mi->mi_drv; | |
371 | register struct buf *bp = mi->mi_tab.b_actf; | |
372 | register struct mu_softc *sc; | |
373 | int er, fc, unit; | |
374 | ||
375 | unit = (mtaddr->mtner >> 8) & 3; | |
376 | er = MASKREG(mtaddr->mtner); | |
377 | /* WILL THIS OCCUR IF ANOTHER DRIVE COMES ONLINE? */ | |
378 | if (bp == 0 || unit != MUUNIT(bp->b_dev)) { /* consistency check */ | |
379 | if ((er & MTER_INTCODE) != MTER_ONLINE) | |
380 | printf("mt: unit %d random interrupt\n", unit); | |
381 | return (MBN_SKIP); | |
382 | } | |
383 | if (bp == 0) | |
384 | return (MBN_SKIP); | |
385 | fc = (mtaddr->mtncs[unit] >> 8) & 0xff; | |
386 | sc = &mu_softc[unit]; | |
387 | sc->sc_erreg = er; | |
388 | sc->sc_resid = fc; | |
389 | switch (er & MTER_INTCODE) { | |
390 | case MTER_DONE: | |
391 | if (bp == &cmtbuf[MTUNIT(bp->b_dev)]) { | |
392 | done: | |
393 | if (bp->b_command == MT_SENSE) | |
394 | sc->sc_dsreg = MASKREG(mtaddr->mtds); | |
395 | bp->b_resid = fc; | |
396 | return (MBN_DONE); | |
397 | } | |
398 | /* this is UGLY! (but is it correct?) */ | |
399 | if ((fc = dbtofsb(bp->b_blkno) - sc->sc_blkno) < 0) | |
155d9ff0 | 400 | sc->sc_blkno -= MIN(0377, -fc); |
83d7e407 | 401 | else |
155d9ff0 | 402 | sc->sc_blkno += MIN(0377, fc); |
83d7e407 BJ |
403 | return (MBN_RETRY); |
404 | ||
405 | case MTER_RWDING: | |
406 | return (MBN_SKIP); /* ignore "rewind started" interrupt */ | |
407 | ||
408 | case MTER_NOTCAP: | |
409 | printf("mu%d: blank tape\n", MUUNIT(bp->b_dev)); | |
410 | ||
411 | case MTER_TM: | |
412 | case MTER_EOT: | |
413 | case MTER_LEOT: | |
414 | if (sc->sc_blkno > dbtofsb(bp->b_blkno)) { | |
415 | sc->sc_nxrec = dbtofsb(bp->b_blkno) + fc; | |
416 | sc->sc_blkno = sc->sc_nxrec; | |
417 | } else { | |
418 | sc->sc_blkno = dbtofsb(bp->b_blkno) - fc; | |
419 | sc->sc_nxrec = sc->sc_blkno - 1; | |
420 | } | |
421 | return (MBN_RETRY); | |
422 | ||
423 | case MTER_FPT: | |
424 | printf("mu%d: no write ring\n", MUUNIT(bp->b_dev)); | |
425 | bp->b_flags |= B_ERROR; | |
426 | return (MBN_DONE); | |
427 | ||
428 | case MTER_OFFLINE: | |
429 | if (sc->sc_openf > 0) { | |
430 | sc->sc_openf = -1; | |
431 | printf("mu%d: offline\n", MUUNIT(bp->b_dev)); | |
432 | } | |
433 | bp->b_flags |= B_ERROR; | |
434 | return (MBN_DONE); | |
435 | ||
436 | case MTER_BOT: | |
437 | if (bp == &cmtbuf[MTUNIT(bp->b_dev)]) | |
438 | goto done; | |
439 | /* FALL THROUGH */ | |
440 | ||
441 | default: | |
442 | printf("mu%d: hard error bn%d er=%o ds=%b\n", | |
443 | MUUNIT(bp->b_dev), bp->b_blkno, | |
444 | sc->sc_erreg, sc->sc_dsreg, mtds_bits); | |
445 | mtaddr->mtid = MTID_CLR; /* reset the TM78 */ | |
446 | DELAY(250); | |
447 | while ((mtaddr->mtid & MTID_RDY) == 0) /* wait for it */ | |
448 | ; | |
449 | bp->b_flags |= B_ERROR; | |
450 | return (MBN_DONE); | |
451 | } | |
452 | /* NOTREACHED */ | |
453 | } | |
454 | ||
455 | mtread(dev) | |
456 | dev_t dev; | |
457 | { | |
458 | ||
459 | mtphys(dev); | |
460 | if (u.u_error) | |
461 | return; | |
462 | physio(mtstrategy, &rmtbuf[MTUNIT(dev)], dev, B_READ, minphys); | |
463 | } | |
464 | ||
465 | mtwrite(dev) | |
466 | { | |
467 | ||
468 | mtphys(dev); | |
469 | if (u.u_error) | |
470 | return; | |
471 | physio(mtstrategy, &rmtbuf[MTUNIT(dev)], dev, B_WRITE, minphys); | |
472 | } | |
473 | ||
474 | mtphys(dev) | |
475 | dev_t dev; | |
476 | { | |
477 | register int mtunit; | |
478 | register struct mu_softc *sc; | |
479 | register struct mba_device *mi; | |
480 | daddr_t a; | |
481 | ||
482 | mtunit = MTUNIT(dev); | |
483 | if (mtunit >= NMT || (mi = mtinfo[mtunit]) == 0 || mi->mi_alive == 0) { | |
484 | u.u_error = ENXIO; | |
485 | return; | |
486 | } | |
487 | a = u.u_offset >> 9; | |
488 | sc = &mu_softc[MUUNIT(dev)]; | |
489 | sc->sc_blkno = dbtofsb(a); | |
490 | sc->sc_nxrec = dbtofsb(a)+1; | |
491 | } | |
492 | ||
493 | /*ARGSUSED*/ | |
494 | mtioctl(dev, cmd, addr, flag) | |
495 | dev_t dev; | |
496 | int cmd; | |
497 | caddr_t addr; | |
498 | int flag; | |
499 | { | |
500 | register struct mu_softc *sc = &mu_softc[MUUNIT(dev)]; | |
501 | register struct buf *bp = &cmtbuf[MTUNIT(dev)]; | |
502 | register callcount; | |
155d9ff0 | 503 | register int op; |
83d7e407 BJ |
504 | int fcount; |
505 | struct mtop mtop; | |
506 | struct mtget mtget; | |
507 | /* we depend of the values and order of the MT codes here */ | |
508 | static mtops[] = | |
509 | {MT_WTM,MT_SFORWF,MT_SREVF,MT_SFORW,MT_SREV,MT_REW,MT_UNLOAD,MT_SENSE}; | |
510 | ||
511 | switch (cmd) { | |
512 | case MTIOCTOP: /* tape operation */ | |
513 | if (copyin((caddr_t)addr, (caddr_t)&mtop, sizeof(mtop))) { | |
514 | u.u_error = EFAULT; | |
515 | return; | |
516 | } | |
517 | switch(mtop.mt_op) { | |
518 | case MTWEOF: | |
519 | callcount = mtop.mt_count; | |
520 | fcount = 1; | |
521 | break; | |
522 | case MTFSF: case MTBSF: | |
523 | callcount = mtop.mt_count; | |
524 | fcount = 1; | |
525 | break; | |
526 | case MTFSR: case MTBSR: | |
527 | callcount = 1; | |
528 | fcount = mtop.mt_count; | |
529 | break; | |
530 | case MTREW: case MTOFFL: | |
531 | callcount = 1; | |
532 | fcount = 1; | |
533 | break; | |
534 | default: | |
535 | u.u_error = ENXIO; | |
536 | return; | |
537 | } | |
538 | if (callcount <= 0 || fcount <= 0) { | |
539 | u.u_error = ENXIO; | |
540 | return; | |
541 | } | |
542 | op = mtops[mtop.mt_op]; | |
543 | if (op == MT_WTM) | |
544 | op |= sc->sc_dens; | |
545 | while (--callcount >= 0) { | |
546 | register int n; | |
547 | ||
548 | do { | |
155d9ff0 | 549 | n = MIN(fcount, 0xff); |
83d7e407 BJ |
550 | mtcommand(dev, op, n); |
551 | fcount -= n; | |
552 | } while (fcount); | |
553 | if ((mtop.mt_op == MTFSR || mtop.mt_op == MTBSR) && | |
554 | bp->b_resid) { | |
555 | u.u_error = EIO; | |
556 | break; | |
557 | } | |
558 | if (bp->b_flags&B_ERROR) | |
559 | break; | |
560 | } | |
561 | geterror(bp); | |
562 | return; | |
563 | case MTIOCGET: | |
564 | mtget.mt_erreg = sc->sc_erreg; | |
565 | mtget.mt_resid = sc->sc_resid; | |
566 | mtcommand(dev, MT_SENSE, 1); /* update drive status */ | |
567 | mtget.mt_dsreg = sc->sc_dsreg; | |
568 | mtget.mt_type = MT_ISMT; | |
569 | if (copyout((caddr_t)&mtget, addr, sizeof(mtget))) | |
570 | u.u_error = EFAULT; | |
571 | return; | |
572 | default: | |
573 | u.u_error = ENXIO; | |
574 | } | |
575 | } | |
576 | ||
577 | #define DBSIZE 20 | |
578 | ||
579 | mtdump() | |
580 | { | |
581 | register struct mba_device *mi; | |
582 | register struct mba_regs *mp; | |
583 | register struct mtdevice *mtaddr; | |
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; | |
155d9ff0 SL |
595 | #if lint |
596 | blk = blk; num = num; start = start; | |
597 | return (0); | |
598 | #endif | |
83d7e407 | 599 | #ifdef notyet |
155d9ff0 | 600 | mtaddr = (struct mtdevice *)&mp->mba_drv[mi->mi_drive]; |
83d7e407 BJ |
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 |