Commit | Line | Data |
---|---|---|
89b8a44c | 1 | /* ut.c 4.9 81/11/18 */ |
b02cd1e9 | 2 | |
7c6c07eb | 3 | #include "tj.h" |
b02cd1e9 | 4 | #if NUT > 0 |
b02cd1e9 BJ |
5 | /* |
6 | * System Industries Model 9700 Tape Drive | |
7 | * emulates a TU45 on the UNIBUS | |
8 | * | |
9 | * TODO: | |
10 | * check out attention processing | |
11 | * try reset code and dump code | |
12 | */ | |
13 | #include "../h/param.h" | |
14 | #include "../h/systm.h" | |
15 | #include "../h/buf.h" | |
16 | #include "../h/conf.h" | |
17 | #include "../h/dir.h" | |
18 | #include "../h/file.h" | |
19 | #include "../h/user.h" | |
20 | #include "../h/map.h" | |
21 | #include "../h/pte.h" | |
22 | #include "../h/ubareg.h" | |
23 | #include "../h/ubavar.h" | |
24 | #include "../h/mtio.h" | |
25 | #include "../h/ioctl.h" | |
26 | #include "../h/cmap.h" | |
27 | #include "../h/cpu.h" | |
28 | ||
29 | #include "../h/utreg.h" | |
30 | ||
31 | struct buf rutbuf[NUT]; /* bufs for raw i/o */ | |
32 | struct buf cutbuf[NUT]; /* bufs for control operations */ | |
33 | struct buf tjutab[NTJ]; /* bufs for slave queue headers */ | |
34 | ||
35 | struct uba_ctlr *utminfo[NUT]; | |
36 | struct uba_device *tjdinfo[NTJ]; | |
407582e3 | 37 | int utprobe(), utslave(), utattach(), utdgo(), utintr(), uttimer(); |
b02cd1e9 BJ |
38 | u_short utstd[] = { 0772440, 0 }; |
39 | struct uba_driver utdriver = | |
40 | { utprobe, utslave, utattach, utdgo, utstd, "tj", tjdinfo, "ut", utminfo, 0 }; | |
41 | ||
42 | /* bits in minor device */ | |
43 | #define TJUNIT(dev) (minor(dev)&03) | |
44 | #define T_NOREWIND 04 | |
45 | #define T_1600BPI 010 | |
46 | #define T_6250BPI 020 | |
47 | short utdens[] = { UT_NRZI, UT_PE, UT_GCR, UT_NRZI }; | |
48 | ||
49 | /* slave to controller mapping table */ | |
50 | short tjtout[NTJ]; | |
51 | #define UTUNIT(dev) (tjtout[TJUNIT(dev)]) | |
52 | ||
53 | #define INF (daddr_t)1000000L /* a block number that wont exist */ | |
54 | ||
55 | struct tj_softc { | |
56 | char sc_openf; /* exclusive open */ | |
57 | char sc_lastiow; /* last I/O operation was a write */ | |
58 | daddr_t sc_blkno; /* next block to transfer */ | |
59 | daddr_t sc_nxrec; /* next record on tape */ | |
60 | u_short sc_erreg; /* image of uter */ | |
61 | u_short sc_dsreg; /* image of utds */ | |
c36079e2 | 62 | u_short sc_resid; /* residual from transfer */ |
b02cd1e9 | 63 | u_short sc_dens; /* sticky selected density */ |
407582e3 BJ |
64 | daddr_t sc_timo; /* time until timeout expires */ |
65 | short sc_tact; /* timeout is active flag */ | |
b02cd1e9 BJ |
66 | } tj_softc[NTJ]; |
67 | ||
68 | /* | |
69 | * Internal per/slave states found in sc_state | |
70 | */ | |
71 | #define SSEEK 1 /* seeking */ | |
72 | #define SIO 2 /* doing sequential I/O */ | |
73 | #define SCOM 3 /* sending a control command */ | |
74 | #define SREW 4 /* doing a rewind op */ | |
c36079e2 SL |
75 | #define SERASE 5 /* erase inter-record gap */ |
76 | #define SERASED 6 /* erased inter-record gap */ | |
b02cd1e9 | 77 | |
89b8a44c | 78 | /*ARGSUSED*/ |
b02cd1e9 BJ |
79 | utprobe(reg) |
80 | caddr_t reg; | |
81 | { | |
82 | register int br, cvec; | |
83 | #ifdef lint | |
84 | br=0; cvec=br; br=cvec; | |
89b8a44c | 85 | utintr(0); |
b02cd1e9 | 86 | #endif |
89b8a44c | 87 | #if 0 |
c36079e2 SL |
88 | /* |
89 | * It appears the controller won't interrupt unless the | |
90 | * slave is off-line...this is as bad as the TS-11. | |
91 | */ | |
b02cd1e9 BJ |
92 | ((struct utdevice *) reg)->utcs1 = UT_IE|UT_NOP|UT_GO; |
93 | DELAY(10000); | |
94 | ((struct utdevice *) reg)->utcs1 = UT_CLEAR|UT_GO; | |
c36079e2 SL |
95 | #else |
96 | br = 0x15; | |
97 | cvec = 0164; | |
b02cd1e9 | 98 | return(1); |
c36079e2 | 99 | #endif |
b02cd1e9 BJ |
100 | } |
101 | ||
102 | /*ARGSUSED*/ | |
103 | utslave(ui, reg) | |
104 | struct uba_device *ui; | |
105 | caddr_t reg; | |
106 | { | |
107 | /* | |
108 | * A real TU45 would support the slave present bit | |
109 | * int the drive type register, but this thing doesn't, | |
110 | * so there's no way to determine if a slave is present or not. | |
111 | */ | |
112 | return(1); | |
113 | } | |
114 | ||
115 | utattach(ui) | |
116 | struct uba_device *ui; | |
117 | { | |
118 | tjtout[ui->ui_unit] = ui->ui_mi->um_ctlr; | |
119 | } | |
120 | ||
121 | /* | |
122 | * Open the device with exclusive access. | |
123 | */ | |
124 | utopen(dev, flag) | |
125 | dev_t dev; | |
126 | int flag; | |
127 | { | |
128 | register int tjunit = TJUNIT(dev); | |
129 | register struct uba_device *ui; | |
130 | register struct tj_softc *sc; | |
131 | int olddens, dens; | |
132 | ||
133 | if (tjunit >= NTJ || (sc = &tj_softc[tjunit])->sc_openf || | |
134 | (ui = tjdinfo[tjunit]) == 0 || ui->ui_alive == 0) { | |
135 | u.u_error = ENXIO; | |
136 | return; | |
137 | } | |
138 | olddens = sc->sc_dens; | |
139 | dens = sc->sc_dens = utdens[(minor(dev)&(T_1600BPI|T_6250BPI))>>3]| | |
140 | PDP11FMT|(ui->ui_slave&07); | |
141 | get: | |
142 | utcommand(dev, UT_SENSE, 1); | |
143 | if (sc->sc_dsreg&UTDS_PIP) { | |
144 | sleep((caddr_t) &lbolt, PZERO+1); | |
145 | goto get; | |
146 | } | |
147 | sc->sc_dens = olddens; | |
148 | if ((sc->sc_dsreg&UTDS_MOL) == 0) { | |
149 | uprintf("tj%d: not online\n", tjunit); | |
150 | u.u_error = EIO; | |
151 | return; | |
152 | } | |
153 | if ((flag&FWRITE) && (sc->sc_dsreg&UTDS_WRL)) { | |
154 | uprintf("tj%d: no write ring\n", tjunit); | |
155 | u.u_error = EIO; | |
156 | return; | |
157 | } | |
158 | if ((sc->sc_dsreg&UTDS_BOT) == 0 && (flag&FWRITE) && | |
159 | dens != sc->sc_dens) { | |
160 | uprintf("tj%d: can't change density in mid-tape\n", tjunit); | |
161 | u.u_error = EIO; | |
162 | return; | |
163 | } | |
164 | sc->sc_openf = 1; | |
165 | sc->sc_blkno = (daddr_t)0; | |
166 | sc->sc_nxrec = INF; | |
167 | sc->sc_lastiow = 0; | |
168 | sc->sc_dens = dens; | |
c36079e2 SL |
169 | /* |
170 | * For 6250 bpi take exclusive use of the UNIBUS. | |
171 | */ | |
172 | ui->ui_driver->ud_xclu = (dens&(T_1600BPI|T_6250BPI)) == T_6250BPI; | |
407582e3 BJ |
173 | (void) spl6(); |
174 | if (sc->sc_tact == 0) { | |
175 | sc->sc_timo = INF; | |
176 | sc->sc_tact = 1; | |
177 | timeout(uttimer, (caddr_t)dev, 5*hz); | |
178 | } | |
179 | (void) spl0(); | |
b02cd1e9 BJ |
180 | } |
181 | ||
182 | utclose(dev, flag) | |
183 | register dev_t dev; | |
184 | register flag; | |
185 | { | |
186 | register struct tj_softc *sc = &tj_softc[TJUNIT(dev)]; | |
187 | ||
188 | if (flag == FWRITE || ((flag&FWRITE) && sc->sc_lastiow)) { | |
189 | utcommand(dev, UT_WEOF, 1); | |
190 | utcommand(dev, UT_WEOF, 1); | |
191 | utcommand(dev, UT_SREV, 1); | |
192 | } | |
193 | if ((minor(dev)&T_NOREWIND) == 0) | |
194 | utcommand(dev, UT_REW, 0); | |
195 | sc->sc_openf = 0; | |
196 | } | |
197 | ||
198 | utcommand(dev, com, count) | |
199 | dev_t dev; | |
200 | int com, count; | |
201 | { | |
202 | register struct buf *bp; | |
203 | ||
204 | bp = &cutbuf[UTUNIT(dev)]; | |
205 | (void) spl5(); | |
206 | while (bp->b_flags&B_BUSY) { | |
207 | if(bp->b_repcnt == 0 && (bp->b_flags&B_DONE)) | |
208 | break; | |
209 | bp->b_flags |= B_WANTED; | |
210 | sleep((caddr_t)bp, PRIBIO); | |
211 | } | |
212 | bp->b_flags = B_BUSY|B_READ; | |
213 | (void) spl0(); | |
214 | bp->b_dev = dev; | |
215 | bp->b_command = com; | |
216 | bp->b_repcnt = count; | |
217 | bp->b_blkno = 0; | |
218 | utstrategy(bp); | |
219 | if (count == 0) | |
220 | return; | |
221 | iowait(bp); | |
222 | if (bp->b_flags&B_WANTED) | |
223 | wakeup((caddr_t)bp); | |
224 | bp->b_flags &= B_ERROR; | |
225 | } | |
226 | ||
227 | /* | |
228 | * Queue a tape operation. | |
229 | */ | |
230 | utstrategy(bp) | |
231 | register struct buf *bp; | |
232 | { | |
233 | int tjunit = TJUNIT(bp->b_dev); | |
234 | register struct uba_ctlr *um; | |
235 | register struct buf *dp; | |
236 | ||
237 | /* | |
238 | * Put transfer at end of unit queue | |
239 | */ | |
240 | dp = &tjutab[tjunit]; | |
241 | bp->av_forw = NULL; | |
242 | (void) spl5(); | |
243 | if (dp->b_actf == NULL) { | |
244 | dp->b_actf = bp; | |
245 | /* | |
246 | * Transport not active, so... | |
247 | * put at end of controller queue | |
248 | */ | |
249 | dp->b_forw = NULL; | |
250 | um = tjdinfo[tjunit]->ui_mi; | |
251 | if (um->um_tab.b_actf == NULL) | |
252 | um->um_tab.b_actf = dp; | |
253 | else | |
254 | um->um_tab.b_actl->b_forw = dp; | |
255 | um->um_tab.b_actl = dp; | |
256 | } else | |
257 | dp->b_actl->av_forw = bp; | |
258 | dp->b_actl = bp; | |
259 | /* | |
260 | * If the controller is not busy, set it going. | |
261 | */ | |
c36079e2 | 262 | if (um->um_tab.b_state == 0) |
b02cd1e9 BJ |
263 | utstart(um); |
264 | (void) spl0(); | |
265 | } | |
266 | ||
267 | utstart(um) | |
268 | register struct uba_ctlr *um; | |
269 | { | |
c36079e2 | 270 | register struct utdevice *addr; |
b02cd1e9 BJ |
271 | register struct buf *bp, *dp; |
272 | register struct tj_softc *sc; | |
273 | struct uba_device *ui; | |
274 | int tjunit; | |
275 | daddr_t blkno; | |
276 | ||
277 | loop: | |
278 | /* | |
279 | * Scan controller queue looking for units with | |
280 | * transaction queues to dispatch | |
281 | */ | |
282 | if ((dp = um->um_tab.b_actf) == NULL) | |
283 | return; | |
284 | if ((bp = dp->b_actf) == NULL) { | |
285 | um->um_tab.b_actf = dp->b_forw; | |
286 | goto loop; | |
287 | } | |
c36079e2 | 288 | addr = (struct utdevice *)um->um_addr; |
b02cd1e9 BJ |
289 | tjunit = TJUNIT(bp->b_dev); |
290 | ui = tjdinfo[tjunit]; | |
291 | sc = &tj_softc[tjunit]; | |
292 | /* note slave select, density, and format were merged on open */ | |
c36079e2 SL |
293 | addr->uttc = sc->sc_dens; |
294 | sc->sc_dsreg = addr->utds; | |
295 | sc->sc_erreg = addr->uter; | |
296 | /* watch this, sports fans */ | |
297 | sc->sc_resid = bp->b_flags&B_READ ? | |
298 | bp->b_bcount - ((-addr->utfc)&0xffff) : -addr->utwc<<1; | |
b02cd1e9 BJ |
299 | /* |
300 | * Default is that last command was NOT a write command; | |
301 | * if we do a write command we will notice this in utintr(). | |
302 | */ | |
303 | sc->sc_lastiow = 0; | |
c36079e2 | 304 | if (sc->sc_openf < 0 || (addr->utds&UTDS_MOL) == 0) { |
b02cd1e9 BJ |
305 | /* |
306 | * Have had a hard error on a non-raw tape | |
307 | * or the tape unit is now unavailable | |
308 | * (e.g. taken off line). | |
309 | */ | |
310 | bp->b_flags |= B_ERROR; | |
311 | goto next; | |
312 | } | |
313 | if (bp == &cutbuf[UTUNIT(bp->b_dev)]) { | |
314 | /* | |
315 | * Execute a control operation with the specified | |
316 | * count. | |
317 | */ | |
318 | if (bp->b_command == UT_SENSE) | |
319 | goto next; | |
320 | /* | |
321 | * Set next state; handle timeouts | |
322 | */ | |
407582e3 | 323 | if (bp->b_command == UT_REW) { |
c36079e2 | 324 | um->um_tab.b_state = SREW; |
407582e3 BJ |
325 | sc->sc_timo = 5*60; |
326 | } else { | |
c36079e2 | 327 | um->um_tab.b_state = SCOM; |
407582e3 BJ |
328 | sc->sc_timo = imin(imax(10*(int)-bp->b_repcnt,60),5*60); |
329 | } | |
b02cd1e9 BJ |
330 | /* NOTE: this depends on the ut command values */ |
331 | if (bp->b_command >= UT_SFORW && bp->b_command <= UT_SREVF) | |
c36079e2 | 332 | addr->utfc = -bp->b_repcnt; |
b02cd1e9 BJ |
333 | goto dobpcmd; |
334 | } | |
335 | /* | |
336 | * The following checks boundary conditions for operations | |
337 | * on non-raw tapes. On raw tapes the initialization of | |
338 | * sc->sc_nxrec by utphys causes them to be skipped normally | |
339 | * (except in the case of retries). | |
340 | */ | |
341 | if (dbtofsb(bp->b_blkno) > sc->sc_nxrec) { | |
342 | /* can't read past end of file */ | |
343 | bp->b_flags |= B_ERROR; | |
344 | bp->b_error = ENXIO; | |
345 | goto next; | |
346 | } | |
347 | if (dbtofsb(bp->b_blkno) == sc->sc_nxrec && (bp->b_flags&B_READ)) { | |
348 | /* read at eof returns 0 count */ | |
349 | bp->b_resid = bp->b_bcount; | |
350 | clrbuf(bp); | |
351 | goto next; | |
352 | } | |
353 | if ((bp->b_flags&B_READ) == 0) | |
354 | sc->sc_nxrec = dbtofsb(bp->b_blkno)+1; | |
355 | /* | |
356 | * If the tape is correctly positioned, set up all the | |
357 | * registers but the csr, and give control over to the | |
358 | * UNIBUS adaptor routines, to wait for resources to | |
359 | * start I/O. | |
360 | */ | |
361 | if ((blkno = sc->sc_blkno) == dbtofsb(bp->b_blkno)) { | |
c36079e2 SL |
362 | addr->utwc = -(((bp->b_bcount)+1)>>1); |
363 | addr->utfc = -bp->b_bcount; | |
b02cd1e9 BJ |
364 | if ((bp->b_flags&B_READ) == 0) { |
365 | /* | |
366 | * On write error retries erase the | |
c36079e2 | 367 | * inter-record gap before rewriting. |
b02cd1e9 | 368 | */ |
c36079e2 | 369 | if (um->um_tab.b_errcnt) { |
c36079e2 | 370 | if (um->um_tab.b_state != SERASED) { |
64614526 | 371 | um->um_tab.b_state = SERASE; |
407582e3 | 372 | sc->sc_timo = 60; |
c36079e2 SL |
373 | addr->utcs1 = UT_ERASE|UT_IE|UT_GO; |
374 | return; | |
375 | } | |
c36079e2 SL |
376 | } |
377 | um->um_cmd = UT_WCOM; | |
b02cd1e9 BJ |
378 | } else |
379 | um->um_cmd = UT_RCOM; | |
407582e3 | 380 | sc->sc_timo = 60; |
c36079e2 | 381 | um->um_tab.b_state = SIO; |
b02cd1e9 BJ |
382 | (void) ubago(ui); |
383 | return; | |
384 | } | |
385 | /* | |
386 | * Tape positioned incorrectly; seek forwards or | |
387 | * backwards to the correct spot. This happens for | |
388 | * raw tapes only on error retries. | |
389 | */ | |
c36079e2 | 390 | um->um_tab.b_state = SSEEK; |
b02cd1e9 | 391 | if (blkno < dbtofsb(bp->b_blkno)) { |
c36079e2 | 392 | addr->utfc = blkno - dbtofsb(bp->b_blkno); |
b02cd1e9 BJ |
393 | bp->b_command = UT_SFORW; |
394 | } else { | |
c36079e2 | 395 | addr->utfc = dbtofsb(bp->b_blkno) - blkno; |
b02cd1e9 BJ |
396 | bp->b_command = UT_SREV; |
397 | } | |
407582e3 | 398 | sc->sc_timo = imin(imax(10 * -addr->utfc, 60), 5*60); |
b02cd1e9 BJ |
399 | |
400 | dobpcmd: | |
401 | /* | |
402 | * Perform the command setup in bp. | |
403 | */ | |
c36079e2 | 404 | addr->utcs1 = bp->b_command|UT_IE|UT_GO; |
b02cd1e9 BJ |
405 | return; |
406 | next: | |
407 | /* | |
408 | * Advance to the next command in the slave queue, | |
409 | * posting notice and releasing resources as needed. | |
410 | */ | |
b02cd1e9 BJ |
411 | if (um->um_ubinfo) |
412 | ubadone(um); | |
413 | um->um_tab.b_errcnt = 0; | |
414 | dp->b_actf = bp->av_forw; | |
415 | iodone(bp); | |
416 | goto loop; | |
417 | } | |
418 | ||
419 | /* | |
420 | * Start operation on controller -- | |
421 | * UNIBUS resources have been allocated. | |
422 | */ | |
423 | utdgo(um) | |
424 | register struct uba_ctlr *um; | |
425 | { | |
426 | register struct utdevice *addr = (struct utdevice *)um->um_addr; | |
427 | ||
428 | addr->utba = (u_short) um->um_ubinfo; | |
429 | addr->utcs1 = um->um_cmd|((um->um_ubinfo>>8)&0x30)|UT_IE|UT_GO; | |
b02cd1e9 BJ |
430 | } |
431 | ||
432 | /* | |
433 | * Ut interrupt handler | |
434 | */ | |
435 | /*ARGSUSED*/ | |
436 | utintr(ut11) | |
437 | int ut11; | |
438 | { | |
439 | struct buf *dp; | |
440 | register struct buf *bp; | |
441 | register struct uba_ctlr *um = utminfo[ut11]; | |
442 | register struct utdevice *addr; | |
443 | register struct tj_softc *sc; | |
c36079e2 | 444 | u_short tjunit, cs2, cs1; |
b02cd1e9 BJ |
445 | register state; |
446 | ||
447 | if ((dp = um->um_tab.b_actf) == NULL) | |
448 | return; | |
449 | bp = dp->b_actf; | |
450 | tjunit = TJUNIT(bp->b_dev); | |
451 | addr = (struct utdevice *)tjdinfo[tjunit]->ui_addr; | |
452 | sc = &tj_softc[tjunit]; | |
453 | /* | |
454 | * Record status... | |
455 | */ | |
da9ebd7c | 456 | sc->sc_timo = INF; |
b02cd1e9 BJ |
457 | sc->sc_dsreg = addr->utds; |
458 | sc->sc_erreg = addr->uter; | |
c36079e2 SL |
459 | sc->sc_resid = bp->b_flags&B_READ ? |
460 | bp->b_bcount - (-addr->utfc)&0xffff : -addr->utwc<<1; | |
c36079e2 | 461 | if ((bp->b_flags&B_READ) == 0) |
b02cd1e9 | 462 | sc->sc_lastiow = 1; |
c36079e2 SL |
463 | state = um->um_tab.b_state; |
464 | um->um_tab.b_state = 0; | |
b02cd1e9 BJ |
465 | /* |
466 | * Check for errors... | |
467 | */ | |
468 | if ((addr->utds&UTDS_ERR) || (addr->utcs1&UT_TRE)) { | |
64614526 BJ |
469 | /* |
470 | * To clear the ERR bit, we must issue a drive clear | |
471 | * command, and to clear the TRE bit we must set the | |
472 | * controller clear bit. | |
473 | */ | |
474 | cs2 = addr->utcs2; | |
475 | if ((cs1 = addr->utcs1)&UT_TRE) | |
476 | addr->utcs2 |= UTCS2_CLR; | |
477 | /* is this dangerous ?? */ | |
478 | while ((addr->utcs1&UT_RDY) == 0) | |
479 | ; | |
480 | addr->utcs1 = UT_CLEAR|UT_GO; | |
b02cd1e9 | 481 | /* |
c36079e2 | 482 | * If we hit a tape mark or EOT update our position. |
b02cd1e9 | 483 | */ |
64614526 | 484 | if (sc->sc_dsreg&(UTDS_TM|UTDS_EOT)) { |
b02cd1e9 | 485 | /* |
64614526 | 486 | * Set blkno and nxrec |
b02cd1e9 BJ |
487 | */ |
488 | if (bp == &cutbuf[UTUNIT(bp->b_dev)]) { | |
489 | if (sc->sc_blkno > dbtofsb(bp->b_blkno)) { | |
b02cd1e9 BJ |
490 | sc->sc_nxrec = |
491 | dbtofsb(bp->b_blkno) - addr->utfc; | |
492 | sc->sc_blkno = sc->sc_nxrec; | |
493 | } else { | |
b02cd1e9 BJ |
494 | sc->sc_blkno = |
495 | dbtofsb(bp->b_blkno) + addr->utfc; | |
496 | sc->sc_nxrec = sc->sc_blkno-1; | |
497 | } | |
c36079e2 | 498 | } else |
b02cd1e9 BJ |
499 | sc->sc_nxrec = dbtofsb(bp->b_blkno); |
500 | state = SCOM; /* force completion */ | |
b02cd1e9 | 501 | /* |
c36079e2 SL |
502 | * Stuff so we can unstuff later |
503 | * to get the residual. | |
b02cd1e9 | 504 | */ |
c36079e2 | 505 | addr->utwc = (-bp->b_bcount)>>1; |
b02cd1e9 | 506 | addr->utfc = -bp->b_bcount; |
c36079e2 SL |
507 | if (sc->sc_dsreg&UTDS_EOT) |
508 | goto harderror; | |
b02cd1e9 BJ |
509 | goto opdone; |
510 | } | |
b02cd1e9 BJ |
511 | /* |
512 | * If we were reading from a raw tape and the only error | |
513 | * was that the record was too long, then we don't consider | |
514 | * this an error. | |
515 | */ | |
516 | if (bp == &rutbuf[UTUNIT(bp->b_dev)] && (bp->b_flags&B_READ) && | |
517 | (sc->sc_erreg&UTER_FCE)) | |
518 | goto ignoreerr; | |
c36079e2 SL |
519 | /* |
520 | * Fix up errors which occur due to backspacing "over" the | |
521 | * front of the tape. | |
522 | */ | |
523 | if ((sc->sc_dsreg&UTDS_BOT) && | |
524 | (bp->b_command == UT_SREV || bp->b_command == UT_SREV) && | |
525 | ((sc->sc_erreg &= ~(UTER_NEF|UTER_FCE)) == 0)) | |
526 | goto opdone; | |
b02cd1e9 BJ |
527 | /* |
528 | * Retry soft errors up to 8 times | |
529 | */ | |
530 | if ((sc->sc_erreg&UTER_HARD) == 0 && state == SIO) { | |
531 | if (++um->um_tab.b_errcnt < 7) { | |
532 | sc->sc_blkno++; | |
533 | ubadone(um); | |
534 | goto opcont; | |
535 | } | |
536 | } else | |
c36079e2 | 537 | harderror: |
b02cd1e9 BJ |
538 | /* |
539 | * Hard or non-I/O errors on non-raw tape | |
c36079e2 SL |
540 | * cause it to close; also, reading off the |
541 | * end of the tape. | |
b02cd1e9 | 542 | */ |
c36079e2 SL |
543 | if (sc->sc_openf > 0 && |
544 | bp != &rutbuf[UTUNIT(bp->b_dev)] || | |
545 | sc->sc_dsreg&UTDS_EOT) | |
b02cd1e9 BJ |
546 | sc->sc_openf = -1; |
547 | /* | |
548 | * Couldn't recover error. | |
549 | */ | |
c36079e2 SL |
550 | printf("ut%d: hard error bn%d cs1=%b er=%b cs2=%b ds=%b\n", |
551 | tjunit, bp->b_blkno, cs1, UT_BITS, sc->sc_erreg, | |
552 | UTER_BITS, cs2, UTCS2_BITS, sc->sc_dsreg, UTDS_BITS); | |
b02cd1e9 BJ |
553 | bp->b_flags |= B_ERROR; |
554 | goto opdone; | |
555 | } | |
556 | ignoreerr: | |
557 | /* | |
558 | * Advance tape control FSM. | |
559 | */ | |
560 | switch (state) { | |
561 | ||
562 | case SIO: /* read/write increments tape block # */ | |
563 | sc->sc_blkno++; | |
c36079e2 | 564 | break; |
b02cd1e9 BJ |
565 | |
566 | case SCOM: /* forw/rev space updates current position */ | |
567 | if (bp == &cutbuf[UTUNIT(bp->b_dev)]) | |
568 | switch (bp->b_command) { | |
569 | ||
570 | case UT_SFORW: | |
571 | sc->sc_blkno -= bp->b_repcnt; | |
572 | break; | |
573 | ||
574 | case UT_SREV: | |
575 | sc->sc_blkno += bp->b_repcnt; | |
576 | break; | |
577 | } | |
c36079e2 | 578 | break; |
b02cd1e9 BJ |
579 | |
580 | case SSEEK: | |
581 | sc->sc_blkno = dbtofsb(bp->b_blkno); | |
582 | goto opcont; | |
583 | ||
c36079e2 SL |
584 | case SERASE: |
585 | /* | |
586 | * Completed erase of the inter-record gap due to a | |
587 | * write error; now retry the write operation. | |
588 | */ | |
589 | um->um_tab.b_state = SERASED; | |
590 | goto opcont; | |
591 | ||
592 | case SREW: /* clear attention bit */ | |
593 | addr->utcs1 = UT_CLEAR|UT_GO; | |
594 | break; | |
595 | ||
b02cd1e9 | 596 | default: |
c36079e2 | 597 | printf("bad state %d\n", state); |
b02cd1e9 BJ |
598 | panic("utintr"); |
599 | } | |
600 | ||
601 | opdone: | |
602 | /* | |
603 | * Reset error count and remove | |
604 | * from device queue | |
605 | */ | |
606 | um->um_tab.b_errcnt = 0; | |
c36079e2 SL |
607 | dp->b_actf = bp->av_forw; |
608 | bp->b_resid = bp->b_command&B_READ ? | |
609 | bp->b_bcount - ((-addr->utfc)&0xffff) : -addr->utwc<<1; | |
b02cd1e9 BJ |
610 | ubadone(um); |
611 | iodone(bp); | |
612 | /* | |
613 | * Circulate slave to end of controller queue | |
614 | * to give other slaves a chance | |
615 | */ | |
616 | um->um_tab.b_actf = dp->b_forw; | |
617 | if (dp->b_actf) { | |
618 | dp->b_forw = NULL; | |
619 | if (um->um_tab.b_actf == NULL) | |
620 | um->um_tab.b_actf = dp; | |
621 | else | |
622 | um->um_tab.b_actl->b_forw = dp; | |
623 | um->um_tab.b_actl = dp; | |
624 | } | |
625 | if (um->um_tab.b_actf == 0) | |
626 | return; | |
627 | opcont: | |
628 | utstart(um); | |
407582e3 BJ |
629 | } |
630 | ||
631 | /* | |
632 | * Watchdog timer routine. | |
633 | */ | |
634 | uttimer(dev) | |
635 | int dev; | |
636 | { | |
637 | register struct tj_softc *sc = &tj_softc[TJUNIT(dev)]; | |
afa0df56 | 638 | register short x; |
407582e3 BJ |
639 | |
640 | if (sc->sc_timo != INF && (sc->sc_timo -= 5) < 0) { | |
d6357dcf | 641 | printf("tj%d: lost interrupt\n", TJUNIT(dev)); |
407582e3 | 642 | sc->sc_timo = INF; |
afa0df56 | 643 | x = spl5(); |
407582e3 | 644 | utintr(UTUNIT(dev)); |
afa0df56 | 645 | (void) splx(x); |
407582e3 BJ |
646 | } |
647 | timeout(uttimer, (caddr_t)dev, 5*hz); | |
b02cd1e9 BJ |
648 | } |
649 | ||
650 | /* | |
651 | * Raw interface for a read | |
652 | */ | |
653 | utread(dev) | |
654 | dev_t dev; | |
655 | { | |
656 | utphys(dev); | |
657 | if (u.u_error) | |
658 | return; | |
659 | physio(utstrategy, &rutbuf[UTUNIT(dev)], dev, B_READ, minphys); | |
660 | } | |
661 | ||
662 | /* | |
663 | * Raw interface for a write | |
664 | */ | |
665 | utwrite(dev) | |
666 | { | |
667 | utphys(dev); | |
668 | if (u.u_error) | |
669 | return; | |
670 | physio(utstrategy, &rutbuf[UTUNIT(dev)], dev, B_WRITE, minphys); | |
671 | } | |
672 | ||
673 | /* | |
674 | * Check for valid device number dev and update our notion | |
675 | * of where we are on the tape | |
676 | */ | |
677 | utphys(dev) | |
678 | dev_t dev; | |
679 | { | |
680 | register int tjunit = TJUNIT(dev); | |
681 | register struct tj_softc *sc; | |
682 | register struct uba_device *ui; | |
b02cd1e9 BJ |
683 | |
684 | if (tjunit >= NTJ || (ui=tjdinfo[tjunit]) == 0 || ui->ui_alive == 0) { | |
685 | u.u_error = ENXIO; | |
686 | return; | |
687 | } | |
b02cd1e9 | 688 | sc = &tj_softc[tjunit]; |
c36079e2 SL |
689 | sc->sc_blkno = dbtofsb(u.u_offset>>9); |
690 | sc->sc_nxrec = sc->sc_blkno+1; | |
b02cd1e9 BJ |
691 | } |
692 | ||
693 | /*ARGSUSED*/ | |
694 | utioctl(dev, cmd, addr, flag) | |
695 | dev_t dev; | |
696 | caddr_t addr; | |
697 | { | |
698 | register struct tj_softc *sc = &tj_softc[TJUNIT(dev)]; | |
699 | register struct buf *bp = &cutbuf[UTUNIT(dev)]; | |
700 | register callcount; | |
701 | int fcount; | |
702 | struct mtop mtop; | |
703 | struct mtget mtget; | |
704 | /* we depend of the values and order of the MT codes here */ | |
705 | static utops[] = | |
706 | {UT_WEOF,UT_SFORWF,UT_SREVF,UT_SFORW,UT_SREV,UT_REW,UT_REWOFFL,UT_SENSE}; | |
707 | ||
708 | switch (cmd) { | |
709 | ||
710 | case MTIOCTOP: | |
711 | if (copyin((caddr_t)addr, (caddr_t)&mtop, sizeof(mtop))) { | |
712 | u.u_error = EFAULT; | |
713 | return; | |
714 | } | |
715 | switch(mtop.mt_op) { | |
716 | ||
717 | case MTWEOF: | |
718 | callcount = mtop.mt_count; | |
719 | fcount = 1; | |
720 | break; | |
721 | ||
722 | case MTFSF: case MTBSF: | |
723 | case MTFSR: case MTBSR: | |
724 | callcount = 1; | |
725 | fcount = mtop.mt_count; | |
726 | break; | |
727 | ||
728 | case MTREW: case MTOFFL: case MTNOP: | |
729 | callcount = 1; | |
730 | fcount = 1; | |
731 | break; | |
732 | ||
733 | default: | |
734 | u.u_error = ENXIO; | |
735 | return; | |
736 | } | |
737 | if (callcount <= 0 || fcount <= 0) { | |
738 | u.u_error = ENXIO; | |
739 | return; | |
740 | } | |
741 | while (--callcount >= 0) { | |
742 | utcommand(dev, utops[mtop.mt_op], fcount); | |
c36079e2 SL |
743 | /* note this depends on the mtop values */ |
744 | if ((mtop.mt_op >= MTFSF || mtop.mt_op <= MTBSR) && | |
b02cd1e9 BJ |
745 | bp->b_resid) { |
746 | u.u_error = EIO; | |
747 | break; | |
748 | } | |
749 | if ((bp->b_flags&B_ERROR) || (sc->sc_dsreg&UTDS_BOT)) | |
750 | break; | |
751 | } | |
752 | geterror(bp); | |
753 | return; | |
754 | ||
755 | case MTIOCGET: | |
756 | mtget.mt_dsreg = sc->sc_dsreg; | |
757 | mtget.mt_erreg = sc->sc_erreg; | |
758 | mtget.mt_resid = sc->sc_resid; | |
759 | mtget.mt_type = MT_ISUT; | |
760 | if (copyout((caddr_t)&mtget, addr, sizeof(mtget))) | |
761 | u.u_error = EFAULT; | |
762 | return; | |
763 | ||
764 | default: | |
765 | u.u_error = ENXIO; | |
766 | } | |
767 | } | |
768 | ||
769 | utreset(uban) | |
770 | int uban; | |
771 | { | |
772 | register struct uba_ctlr *um; | |
773 | register ut11, tjunit; | |
774 | register struct uba_device *ui; | |
775 | register struct buf *dp; | |
776 | ||
777 | for (ut11 = 0; ut11 < NUT; ut11++) { | |
778 | if ((um = utminfo[ut11]) == 0 || um->um_alive == 0 || | |
779 | um->um_ubanum != uban) | |
780 | continue; | |
781 | printf(" ut%d", ut11); | |
c36079e2 | 782 | um->um_tab.b_state = 0; |
b02cd1e9 BJ |
783 | um->um_tab.b_actf = um->um_tab.b_actl = 0; |
784 | if (um->um_ubinfo) { | |
785 | printf("<%d>", (um->um_ubinfo>>28)&0xf); | |
786 | ubadone(um); | |
787 | } | |
788 | ((struct utdevice *)(um->um_addr))->utcs1 = UT_CLEAR|UT_GO; | |
c36079e2 | 789 | ((struct utdevice *)(um->um_addr))->utcs2 |= UTCS2_CLR; |
b02cd1e9 BJ |
790 | for (tjunit = 0; tjunit < NTJ; tjunit++) { |
791 | if ((ui = tjdinfo[tjunit]) == 0 || ui->ui_mi != um || | |
792 | ui->ui_alive == 0) | |
793 | continue; | |
794 | dp = &tjutab[tjunit]; | |
c36079e2 | 795 | dp->b_state = 0; |
b02cd1e9 BJ |
796 | dp->b_forw = 0; |
797 | if (um->um_tab.b_actf == NULL) | |
798 | um->um_tab.b_actf = dp; | |
799 | else | |
800 | um->um_tab.b_actl->b_forw = dp; | |
801 | um->um_tab.b_actl = dp; | |
802 | if (tj_softc[tjunit].sc_openf > 0) | |
803 | tj_softc[tjunit].sc_openf = -1; | |
804 | } | |
805 | utstart(um); | |
806 | } | |
807 | } | |
808 | ||
809 | /* | |
810 | * Do a stand-alone core dump to tape -- | |
811 | * from here down, routines are used only in dump context | |
812 | */ | |
813 | #define DBSIZE 20 | |
814 | ||
815 | utdump() | |
816 | { | |
817 | register struct uba_device *ui; | |
818 | register struct uba_regs *up; | |
c36079e2 | 819 | register struct utdevice *addr; |
b02cd1e9 BJ |
820 | int blk, num = maxfree; |
821 | int start = 0; | |
822 | ||
823 | #define phys(a,b) ((b)((int)(a)&0x7fffffff)) | |
824 | if (tjdinfo[0] == 0) | |
825 | return (ENXIO); | |
826 | ui = phys(tjdinfo[0], struct uba_device *); | |
827 | up = phys(ui->ui_hd, struct uba_hd *)->uh_physuba; | |
89b8a44c | 828 | ubainit(up); |
b02cd1e9 | 829 | DELAY(1000000); |
c36079e2 | 830 | addr = (struct utdevice *)ui->ui_physaddr; |
89b8a44c | 831 | utwait(addr); |
c36079e2 SL |
832 | /* |
833 | * Be sure to set the appropriate density here. We use | |
834 | * 6250, but maybe it should be done at 1600 to insure the | |
835 | * tape can be read by most any other tape drive available. | |
836 | */ | |
837 | addr->uttc = UT_GCR|PDP11FMT; /* implicit slave 0 or-ed in */ | |
838 | addr->utcs1 = UT_CLEAR|UT_GO; | |
b02cd1e9 BJ |
839 | while (num > 0) { |
840 | blk = num > DBSIZE ? DBSIZE : num; | |
c36079e2 SL |
841 | utdwrite(start, blk, addr, up); |
842 | if ((addr->utds&UTDS_ERR) || (addr->utcs1&UT_TRE)) | |
843 | return(EIO); | |
b02cd1e9 BJ |
844 | start += blk; |
845 | num -= blk; | |
846 | } | |
c36079e2 SL |
847 | uteof(addr); |
848 | uteof(addr); | |
849 | utwait(addr); | |
850 | if ((addr->utds&UTDS_ERR) || (addr->utcs1&UT_TRE)) | |
b02cd1e9 | 851 | return(EIO); |
c36079e2 | 852 | addr->utcs1 = UT_REW|UT_GO; |
b02cd1e9 BJ |
853 | return (0); |
854 | } | |
855 | ||
c36079e2 | 856 | utdwrite(dbuf, num, addr, up) |
b02cd1e9 | 857 | register dbuf, num; |
c36079e2 | 858 | register struct utdevice *addr; |
b02cd1e9 BJ |
859 | struct uba_regs *up; |
860 | { | |
861 | register struct pte *io; | |
862 | register int npf; | |
863 | ||
c36079e2 | 864 | utwait(addr); |
b02cd1e9 BJ |
865 | io = up->uba_map; |
866 | npf = num + 1; | |
867 | while (--npf != 0) | |
868 | *(int *)io++ = (dbuf++ | (1<<UBAMR_DPSHIFT) | UBAMR_MRV); | |
869 | *(int *)io = 0; | |
c36079e2 SL |
870 | addr->utwc = -((num*NBPG)>>1); |
871 | addr->utfc = -(num*NBPG); | |
872 | addr->utba = 0; | |
873 | addr->utcs1 = UT_WCOM|UT_GO; | |
b02cd1e9 BJ |
874 | } |
875 | ||
c36079e2 SL |
876 | utwait(addr) |
877 | struct utdevice *addr; | |
b02cd1e9 BJ |
878 | { |
879 | register s; | |
880 | ||
881 | do | |
c36079e2 | 882 | s = addr->utds; |
b02cd1e9 BJ |
883 | while ((s&UTDS_DRY) == 0); |
884 | } | |
885 | ||
c36079e2 SL |
886 | uteof(addr) |
887 | struct utdevice *addr; | |
b02cd1e9 BJ |
888 | { |
889 | ||
c36079e2 SL |
890 | utwait(addr); |
891 | addr->utcs1 = UT_WEOF|UT_GO; | |
b02cd1e9 BJ |
892 | } |
893 | #endif |