Commit | Line | Data |
---|---|---|
a1edc12b | 1 | /* mt.c 4.13 82/10/17 */ |
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" | |
83d7e407 | 24 | #include "../h/ioctl.h" |
942f05a9 | 25 | #include "../h/mtio.h" |
83d7e407 | 26 | #include "../h/cmap.h" |
deb8980a | 27 | #include "../h/uio.h" |
83d7e407 | 28 | |
c895c266 BJ |
29 | #include "../vax/cpu.h" |
30 | #include "../vaxmba/mbareg.h" | |
31 | #include "../vaxmba/mbavar.h" | |
32 | #include "../vaxmba/mtreg.h" | |
83d7e407 BJ |
33 | |
34 | struct buf rmtbuf[NMT]; | |
35 | struct buf cmtbuf[NMT]; | |
36 | ||
37 | short mttypes[] = | |
38 | { MBDT_TU78, 0 }; | |
39 | struct mba_device *mtinfo[NMT]; | |
40 | int mtattach(), mtslave(), mtustart(), mtstart(), mtndtint(), mtdtint(); | |
41 | struct mba_driver mtdriver = | |
42 | { mtattach, mtslave, mtustart, mtstart, mtdtint, mtndtint, | |
43 | mttypes, "mt", "mu", mtinfo }; | |
44 | ||
45 | #define MASKREG(r) ((r) & 0xffff) | |
46 | ||
47 | /* bits in minor device */ | |
48 | #define MUUNIT(dev) (minor(dev)&03) | |
49 | #define H_NOREWIND 04 | |
50 | #define H_6250BPI 08 | |
51 | ||
52 | #define MTUNIT(dev) (mutomt[MUUNIT(dev)]) | |
53 | ||
54 | #define INF (daddr_t)1000000L /* a block number that wont exist */ | |
55 | ||
56 | struct mu_softc { | |
57 | char sc_openf; | |
58 | char sc_flags; | |
59 | daddr_t sc_blkno; | |
60 | daddr_t sc_nxrec; | |
61 | u_short sc_erreg; | |
62 | u_short sc_dsreg; | |
63 | short sc_resid; | |
64 | short sc_dens; | |
65 | struct mba_device *sc_mi; | |
66 | int sc_slave; | |
67 | } mu_softc[NMU]; | |
68 | short mutomt[NMU]; | |
69 | ||
70 | /* | |
71 | * Bits for sc_flags. | |
72 | */ | |
73 | #define H_WRITTEN 1 /* last operation was a write */ | |
74 | ||
75 | char mtds_bits[] = MTDS_BITS; | |
76 | ||
77 | /*ARGSUSED*/ | |
78 | mtattach(mi) | |
79 | struct mba_device *mi; | |
80 | { | |
a1edc12b | 81 | |
83d7e407 BJ |
82 | } |
83 | ||
51250c66 | 84 | mtslave(mi, ms, sn) |
83d7e407 BJ |
85 | struct mba_device *mi; |
86 | struct mba_slave *ms; | |
51250c66 | 87 | int sn; |
83d7e407 BJ |
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; | |
51250c66 | 94 | mtaddr->mtncs[sn] = MT_SENSE|MT_GO; |
83d7e407 BJ |
95 | while (mtaddr->mtas == 0) |
96 | ; | |
97 | if ((mtaddr->mtner & MTER_INTCODE) == MTER_DONE && | |
98 | (mtaddr->mtds & MTDS_PRES)) { | |
99 | sc->sc_mi = mi; | |
51250c66 | 100 | sc->sc_slave = sn; |
83d7e407 BJ |
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 || | |
473a2e47 BJ |
120 | (mi = mtinfo[MTUNIT(dev)]) == 0 || mi->mi_alive == 0) |
121 | return (ENXIO); | |
83d7e407 BJ |
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); | |
473a2e47 | 128 | return (EIO); |
83d7e407 BJ |
129 | } |
130 | if ((flag&FWRITE) && (sc->sc_dsreg&MTDS_FPT)) { | |
131 | uprintf("mu%d: no write ring\n", muunit); | |
473a2e47 | 132 | return (EIO); |
83d7e407 BJ |
133 | } |
134 | if ((sc->sc_dsreg & MTDS_BOT) == 0 && (flag&FWRITE) && | |
135 | dens != sc->sc_dens) { | |
136 | uprintf("mu%d: can't change density in mid-tape\n", muunit); | |
473a2e47 | 137 | return (EIO); |
83d7e407 BJ |
138 | } |
139 | sc->sc_openf = 1; | |
140 | sc->sc_blkno = (daddr_t)0; | |
141 | sc->sc_nxrec = INF; | |
142 | sc->sc_flags = 0; | |
143 | sc->sc_dens = dens; | |
473a2e47 | 144 | return (0); |
83d7e407 BJ |
145 | } |
146 | ||
147 | mtclose(dev, flag) | |
148 | register dev_t dev; | |
149 | register flag; | |
150 | { | |
151 | register struct mu_softc *sc = &mu_softc[MUUNIT(dev)]; | |
152 | ||
153 | if (flag == FWRITE || ((flag&FWRITE) && (sc->sc_flags&H_WRITTEN))) | |
154 | mtcommand(dev, MT_CLS|sc->sc_dens, 1); | |
155 | if ((minor(dev)&H_NOREWIND) == 0) | |
156 | mtcommand(dev, MT_REW, 0); | |
157 | sc->sc_openf = 0; | |
158 | } | |
159 | ||
160 | mtcommand(dev, com, count) | |
161 | dev_t dev; | |
162 | int com, count; | |
163 | { | |
164 | register struct buf *bp; | |
2311123d | 165 | register int s; |
83d7e407 BJ |
166 | |
167 | bp = &cmtbuf[MTUNIT(dev)]; | |
2311123d | 168 | s = spl5(); |
83d7e407 BJ |
169 | while (bp->b_flags&B_BUSY) { |
170 | if(bp->b_repcnt == 0 && (bp->b_flags&B_DONE)) | |
171 | break; | |
172 | bp->b_flags |= B_WANTED; | |
173 | sleep((caddr_t)bp, PRIBIO); | |
174 | } | |
175 | bp->b_flags = B_BUSY|B_READ; | |
2311123d | 176 | splx(s); |
83d7e407 BJ |
177 | bp->b_dev = dev; |
178 | bp->b_command = com; | |
179 | bp->b_repcnt = count; | |
180 | bp->b_blkno = 0; | |
181 | mtstrategy(bp); | |
182 | if (count == 0) | |
183 | return; | |
184 | iowait(bp); | |
185 | if (bp->b_flags&B_WANTED) | |
186 | wakeup((caddr_t)bp); | |
187 | bp->b_flags &= B_ERROR; | |
188 | } | |
189 | ||
190 | mtstrategy(bp) | |
191 | register struct buf *bp; | |
192 | { | |
193 | register struct mba_device *mi = mtinfo[MTUNIT(bp->b_dev)]; | |
194 | register struct buf *dp; | |
2311123d | 195 | register int s; |
83d7e407 BJ |
196 | |
197 | bp->av_forw = NULL; | |
198 | dp = &mi->mi_tab; | |
2311123d | 199 | s = spl5(); |
83d7e407 BJ |
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); | |
2311123d | 207 | splx(s); |
83d7e407 BJ |
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)]) { | |
43d66181 | 225 | if (bdbtofsb(bp->b_blkno) > sc->sc_nxrec) { |
83d7e407 BJ |
226 | bp->b_flags |= B_ERROR; |
227 | bp->b_error = ENXIO; | |
228 | return (MBU_NEXT); | |
229 | } | |
43d66181 | 230 | if (bdbtofsb(bp->b_blkno) == sc->sc_nxrec && |
83d7e407 BJ |
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) | |
43d66181 | 237 | sc->sc_nxrec = bdbtofsb(bp->b_blkno) + 1; |
83d7e407 BJ |
238 | } else { |
239 | mtaddr->mtncs[MUUNIT(bp->b_dev)] = | |
240 | (bp->b_repcnt<<8)|bp->b_command|MT_GO; | |
241 | return (MBU_STARTED); | |
242 | } | |
43d66181 | 243 | if ((blkno = sc->sc_blkno) == bdbtofsb(bp->b_blkno)) { |
83d7e407 BJ |
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 | } | |
43d66181 | 252 | if (blkno < bdbtofsb(bp->b_blkno)) |
83d7e407 | 253 | mtaddr->mtncs[MUUNIT(bp->b_dev)] = |
43d66181 | 254 | (min((unsigned)(bdbtofsb(bp->b_blkno) - blkno), 0377) << 8) | |
155d9ff0 | 255 | MT_SFORW|MT_GO; |
83d7e407 BJ |
256 | else |
257 | mtaddr->mtncs[MUUNIT(bp->b_dev)] = | |
43d66181 | 258 | (min((unsigned)(blkno - bdbtofsb(bp->b_blkno)), 0377) << 8) | |
155d9ff0 | 259 | MT_SREV|MT_GO; |
83d7e407 BJ |
260 | return (MBU_STARTED); |
261 | } | |
262 | ||
263 | mtstart(mi) | |
264 | register struct mba_device *mi; | |
265 | { | |
266 | register struct buf *bp = mi->mi_tab.b_actf; | |
267 | register struct mu_softc *sc = &mu_softc[MUUNIT(bp->b_dev)]; | |
268 | ||
269 | if (bp->b_flags & B_READ) | |
270 | if (mi->mi_tab.b_errcnt == 2) | |
271 | return(MT_READREV|MT_GO); | |
272 | else | |
273 | return(MT_READ|MT_GO); | |
274 | else | |
275 | return(MT_WRITE|sc->sc_dens|MT_GO); | |
276 | } | |
277 | ||
278 | mtdtint(mi, mbsr) | |
279 | register struct mba_device *mi; | |
280 | int mbsr; | |
281 | { | |
282 | register struct mtdevice *mtaddr = (struct mtdevice *)mi->mi_drv; | |
283 | register struct buf *bp = mi->mi_tab.b_actf; | |
284 | register struct mu_softc *sc; | |
285 | ||
286 | /* I'M NOT SURE IF THIS SHOULD ALWAYS BE THE CASE SO FOR NOW... */ | |
287 | if ((mtaddr->mtca&3) != MUUNIT(bp->b_dev)) { | |
288 | printf("mt: wrong unit!\n"); | |
289 | mtaddr->mtca = MUUNIT(bp->b_dev); | |
290 | } | |
291 | sc = &mu_softc[MUUNIT(bp->b_dev)]; | |
292 | sc->sc_erreg = mtaddr->mter; | |
293 | if((bp->b_flags & B_READ) == 0) | |
294 | sc->sc_flags |= H_WRITTEN; | |
295 | switch (sc->sc_erreg & MTER_INTCODE) { | |
296 | case MTER_DONE: | |
297 | case MTER_LONGREC: | |
298 | if (mi->mi_tab.b_errcnt != 2) | |
299 | sc->sc_blkno++; | |
300 | bp->b_resid = 0; | |
301 | break; | |
302 | ||
303 | case MTER_NOTCAP: | |
304 | printf("mu%d: blank tape\n", MUUNIT(bp->b_dev)); | |
305 | goto err; | |
306 | ||
307 | case MTER_TM: | |
308 | case MTER_EOT: | |
309 | sc->sc_blkno++; | |
310 | err: | |
311 | bp->b_resid = bp->b_bcount; | |
43d66181 | 312 | sc->sc_nxrec = bdbtofsb(bp->b_blkno); |
83d7e407 BJ |
313 | break; |
314 | ||
315 | case MTER_SHRTREC: | |
316 | sc->sc_blkno++; | |
317 | if (bp != &rmtbuf[MTUNIT(bp->b_dev)]) | |
318 | bp->b_flags |= B_ERROR; | |
319 | if (mi->mi_tab.b_errcnt == 2) | |
320 | bp->b_bcount = bp->b_resid; /* restore saved value */ | |
321 | bp->b_resid = bp->b_bcount - mtaddr->mtbc; | |
322 | break; | |
323 | ||
324 | case MTER_RDOPP: | |
325 | mi->mi_tab.b_errcnt = 2; /* indicate "read opposite" */ | |
326 | bp->b_resid = bp->b_bcount; /* save it */ | |
327 | bp->b_bcount = mtaddr->mtbc; /* use this instead */ | |
328 | return(MBD_RETRY); | |
329 | ||
330 | case MTER_RETRY: | |
331 | mi->mi_tab.b_errcnt = 1; /* indicate simple retry */ | |
332 | return(MBD_RETRY); | |
333 | ||
334 | case MTER_OFFLINE: | |
335 | if (sc->sc_openf > 0) { | |
336 | sc->sc_openf = -1; | |
337 | printf("mu%d: offline\n", MUUNIT(bp->b_dev)); | |
338 | } | |
339 | bp->b_flags |= B_ERROR; | |
340 | break; | |
341 | ||
342 | case MTER_FPT: | |
343 | printf("mu%d: no write ring\n", MUUNIT(bp->b_dev)); | |
344 | bp->b_flags |= B_ERROR; | |
345 | break; | |
346 | ||
347 | default: | |
348 | printf("mu%d: hard error bn%d mbsr=%b er=%x ds=%b\n", | |
349 | MUUNIT(bp->b_dev), bp->b_blkno, | |
350 | mbsr, mbsr_bits, sc->sc_erreg, | |
351 | sc->sc_dsreg, mtds_bits); | |
352 | bp->b_flags |= B_ERROR; | |
353 | mtaddr->mtid = MTID_CLR; /* reset the TM78 */ | |
354 | DELAY(250); | |
355 | while ((mtaddr->mtid & MTID_RDY) == 0) /* wait for it */ | |
356 | ; | |
357 | return (MBD_DONE); | |
358 | } | |
359 | /* CHECK FOR MBA ERROR WHEN NO OTHER ERROR INDICATED? */ | |
360 | return (MBD_DONE); | |
361 | } | |
362 | ||
363 | mtndtint(mi) | |
364 | register struct mba_device *mi; | |
365 | { | |
366 | register struct mtdevice *mtaddr = (struct mtdevice *)mi->mi_drv; | |
367 | register struct buf *bp = mi->mi_tab.b_actf; | |
368 | register struct mu_softc *sc; | |
369 | int er, fc, unit; | |
370 | ||
371 | unit = (mtaddr->mtner >> 8) & 3; | |
372 | er = MASKREG(mtaddr->mtner); | |
373 | /* WILL THIS OCCUR IF ANOTHER DRIVE COMES ONLINE? */ | |
374 | if (bp == 0 || unit != MUUNIT(bp->b_dev)) { /* consistency check */ | |
375 | if ((er & MTER_INTCODE) != MTER_ONLINE) | |
376 | printf("mt: unit %d random interrupt\n", unit); | |
377 | return (MBN_SKIP); | |
378 | } | |
379 | if (bp == 0) | |
380 | return (MBN_SKIP); | |
381 | fc = (mtaddr->mtncs[unit] >> 8) & 0xff; | |
382 | sc = &mu_softc[unit]; | |
383 | sc->sc_erreg = er; | |
384 | sc->sc_resid = fc; | |
385 | switch (er & MTER_INTCODE) { | |
386 | case MTER_DONE: | |
387 | if (bp == &cmtbuf[MTUNIT(bp->b_dev)]) { | |
388 | done: | |
389 | if (bp->b_command == MT_SENSE) | |
390 | sc->sc_dsreg = MASKREG(mtaddr->mtds); | |
391 | bp->b_resid = fc; | |
392 | return (MBN_DONE); | |
393 | } | |
394 | /* this is UGLY! (but is it correct?) */ | |
43d66181 | 395 | if ((fc = bdbtofsb(bp->b_blkno) - sc->sc_blkno) < 0) |
155d9ff0 | 396 | sc->sc_blkno -= MIN(0377, -fc); |
83d7e407 | 397 | else |
155d9ff0 | 398 | sc->sc_blkno += MIN(0377, fc); |
83d7e407 BJ |
399 | return (MBN_RETRY); |
400 | ||
401 | case MTER_RWDING: | |
402 | return (MBN_SKIP); /* ignore "rewind started" interrupt */ | |
403 | ||
404 | case MTER_NOTCAP: | |
405 | printf("mu%d: blank tape\n", MUUNIT(bp->b_dev)); | |
406 | ||
407 | case MTER_TM: | |
408 | case MTER_EOT: | |
409 | case MTER_LEOT: | |
43d66181 SL |
410 | if (sc->sc_blkno > bdbtofsb(bp->b_blkno)) { |
411 | sc->sc_nxrec = bdbtofsb(bp->b_blkno) + fc; | |
83d7e407 BJ |
412 | sc->sc_blkno = sc->sc_nxrec; |
413 | } else { | |
43d66181 | 414 | sc->sc_blkno = bdbtofsb(bp->b_blkno) - fc; |
83d7e407 BJ |
415 | sc->sc_nxrec = sc->sc_blkno - 1; |
416 | } | |
417 | return (MBN_RETRY); | |
418 | ||
419 | case MTER_FPT: | |
420 | printf("mu%d: no write ring\n", MUUNIT(bp->b_dev)); | |
421 | bp->b_flags |= B_ERROR; | |
422 | return (MBN_DONE); | |
423 | ||
424 | case MTER_OFFLINE: | |
425 | if (sc->sc_openf > 0) { | |
426 | sc->sc_openf = -1; | |
427 | printf("mu%d: offline\n", MUUNIT(bp->b_dev)); | |
428 | } | |
429 | bp->b_flags |= B_ERROR; | |
430 | return (MBN_DONE); | |
431 | ||
432 | case MTER_BOT: | |
433 | if (bp == &cmtbuf[MTUNIT(bp->b_dev)]) | |
434 | goto done; | |
435 | /* FALL THROUGH */ | |
436 | ||
437 | default: | |
438 | printf("mu%d: hard error bn%d er=%o ds=%b\n", | |
439 | MUUNIT(bp->b_dev), bp->b_blkno, | |
440 | sc->sc_erreg, sc->sc_dsreg, mtds_bits); | |
441 | mtaddr->mtid = MTID_CLR; /* reset the TM78 */ | |
442 | DELAY(250); | |
443 | while ((mtaddr->mtid & MTID_RDY) == 0) /* wait for it */ | |
444 | ; | |
445 | bp->b_flags |= B_ERROR; | |
446 | return (MBN_DONE); | |
447 | } | |
448 | /* NOTREACHED */ | |
449 | } | |
450 | ||
deb8980a | 451 | mtread(dev, uio) |
83d7e407 | 452 | dev_t dev; |
deb8980a | 453 | struct uio *uio; |
83d7e407 | 454 | { |
23458a62 | 455 | int errno; |
83d7e407 | 456 | |
23458a62 BJ |
457 | errno = mtphys(dev, uio); |
458 | if (errno) | |
459 | return (errno); | |
460 | return (physio(mtstrategy, &rmtbuf[MTUNIT(dev)], dev, B_READ, minphys, uio)); | |
83d7e407 BJ |
461 | } |
462 | ||
406ddcbe BJ |
463 | mtwrite(dev, uio) |
464 | dev_t dev; | |
465 | struct uio *uio; | |
83d7e407 | 466 | { |
23458a62 | 467 | int errno; |
83d7e407 | 468 | |
23458a62 BJ |
469 | errno = mtphys(dev, uio); |
470 | if (errno) | |
471 | return (errno); | |
472 | return (physio(mtstrategy, &rmtbuf[MTUNIT(dev)], dev, B_WRITE, minphys, uio)); | |
83d7e407 BJ |
473 | } |
474 | ||
deb8980a | 475 | mtphys(dev, uio) |
83d7e407 | 476 | dev_t dev; |
deb8980a | 477 | struct uio *uio; |
83d7e407 BJ |
478 | { |
479 | register int mtunit; | |
480 | register struct mu_softc *sc; | |
481 | register struct mba_device *mi; | |
482 | daddr_t a; | |
483 | ||
484 | mtunit = MTUNIT(dev); | |
406ddcbe | 485 | if (mtunit >= NMT || (mi = mtinfo[mtunit]) == 0 || mi->mi_alive == 0) |
deb8980a | 486 | return (ENXIO); |
406ddcbe | 487 | a = uio->uio_offset >> 9; |
83d7e407 | 488 | sc = &mu_softc[MUUNIT(dev)]; |
43d66181 SL |
489 | sc->sc_blkno = bdbtofsb(a); |
490 | sc->sc_nxrec = bdbtofsb(a)+1; | |
deb8980a | 491 | return (0); |
83d7e407 BJ |
492 | } |
493 | ||
494 | /*ARGSUSED*/ | |
942f05a9 | 495 | mtioctl(dev, cmd, data, flag) |
83d7e407 BJ |
496 | dev_t dev; |
497 | int cmd; | |
942f05a9 | 498 | caddr_t data; |
83d7e407 BJ |
499 | int flag; |
500 | { | |
501 | register struct mu_softc *sc = &mu_softc[MUUNIT(dev)]; | |
502 | register struct buf *bp = &cmtbuf[MTUNIT(dev)]; | |
503 | register callcount; | |
155d9ff0 | 504 | register int op; |
83d7e407 | 505 | int fcount; |
942f05a9 SL |
506 | struct mtop *mtop; |
507 | struct mtget *mtget; | |
83d7e407 BJ |
508 | /* we depend of the values and order of the MT codes here */ |
509 | static mtops[] = | |
510 | {MT_WTM,MT_SFORWF,MT_SREVF,MT_SFORW,MT_SREV,MT_REW,MT_UNLOAD,MT_SENSE}; | |
511 | ||
512 | switch (cmd) { | |
942f05a9 SL |
513 | |
514 | case MTIOCTOP: /* tape operation */ | |
2e9f5990 BJ |
515 | mtop = (struct mtop *)data; |
516 | switch (mtop->mt_op) { | |
942f05a9 | 517 | |
83d7e407 | 518 | case MTWEOF: |
942f05a9 | 519 | callcount = mtop->mt_count; |
83d7e407 BJ |
520 | fcount = 1; |
521 | break; | |
942f05a9 | 522 | |
83d7e407 | 523 | case MTFSF: case MTBSF: |
942f05a9 | 524 | callcount = mtop->mt_count; |
83d7e407 BJ |
525 | fcount = 1; |
526 | break; | |
942f05a9 | 527 | |
83d7e407 BJ |
528 | case MTFSR: case MTBSR: |
529 | callcount = 1; | |
942f05a9 | 530 | fcount = mtop->mt_count; |
83d7e407 | 531 | break; |
942f05a9 | 532 | |
83d7e407 BJ |
533 | case MTREW: case MTOFFL: |
534 | callcount = 1; | |
535 | fcount = 1; | |
536 | break; | |
942f05a9 | 537 | |
83d7e407 | 538 | default: |
473a2e47 | 539 | return (ENXIO); |
83d7e407 | 540 | } |
473a2e47 BJ |
541 | if (callcount <= 0 || fcount <= 0) |
542 | return (EINVAL); | |
942f05a9 | 543 | op = mtops[mtop->mt_op]; |
83d7e407 BJ |
544 | if (op == MT_WTM) |
545 | op |= sc->sc_dens; | |
546 | while (--callcount >= 0) { | |
547 | register int n; | |
548 | ||
549 | do { | |
155d9ff0 | 550 | n = MIN(fcount, 0xff); |
83d7e407 BJ |
551 | mtcommand(dev, op, n); |
552 | fcount -= n; | |
553 | } while (fcount); | |
942f05a9 | 554 | if ((mtop->mt_op == MTFSR || mtop->mt_op == MTBSR) && |
473a2e47 BJ |
555 | bp->b_resid) |
556 | return (EIO); | |
83d7e407 BJ |
557 | if (bp->b_flags&B_ERROR) |
558 | break; | |
559 | } | |
473a2e47 BJ |
560 | geterror(bp); /* XXX */ |
561 | return (u.u_error); /* XXX */ | |
942f05a9 | 562 | |
83d7e407 | 563 | case MTIOCGET: |
942f05a9 SL |
564 | mtget = (struct mtget *)data; |
565 | mtget->mt_erreg = sc->sc_erreg; | |
566 | mtget->mt_resid = sc->sc_resid; | |
83d7e407 | 567 | mtcommand(dev, MT_SENSE, 1); /* update drive status */ |
942f05a9 SL |
568 | mtget->mt_dsreg = sc->sc_dsreg; |
569 | mtget->mt_type = MT_ISMT; | |
473a2e47 | 570 | break; |
942f05a9 | 571 | |
83d7e407 | 572 | default: |
473a2e47 | 573 | return (ENXIO); |
83d7e407 | 574 | } |
473a2e47 | 575 | return (0); |
83d7e407 BJ |
576 | } |
577 | ||
578 | #define DBSIZE 20 | |
579 | ||
580 | mtdump() | |
581 | { | |
582 | register struct mba_device *mi; | |
583 | register struct mba_regs *mp; | |
83d7e407 BJ |
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 | 595 | #if lint |
2e9f5990 | 596 | blk = 0; num = blk; start = num; blk = start; |
155d9ff0 SL |
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 |