Commit | Line | Data |
---|---|---|
da7c5cc6 | 1 | /* |
0880b18e | 2 | * Copyright (c) 1982, 1986 Regents of the University of California. |
da7c5cc6 KM |
3 | * All rights reserved. The Berkeley software License Agreement |
4 | * specifies the terms and conditions for redistribution. | |
5 | * | |
5c0ca3ef | 6 | * @(#)ut.c 7.10 (Berkeley) %G% |
da7c5cc6 | 7 | */ |
b02cd1e9 | 8 | |
7c6c07eb | 9 | #include "tj.h" |
b02cd1e9 | 10 | #if NUT > 0 |
b02cd1e9 BJ |
11 | /* |
12 | * System Industries Model 9700 Tape Drive | |
13 | * emulates a TU45 on the UNIBUS | |
14 | * | |
15 | * TODO: | |
16 | * check out attention processing | |
17 | * try reset code and dump code | |
18 | */ | |
ff360633 JB |
19 | #include "param.h" |
20 | #include "systm.h" | |
21 | #include "buf.h" | |
22 | #include "conf.h" | |
ff360633 | 23 | #include "file.h" |
ff360633 JB |
24 | #include "map.h" |
25 | #include "ioctl.h" | |
26 | #include "mtio.h" | |
27 | #include "cmap.h" | |
28 | #include "uio.h" | |
29 | #include "kernel.h" | |
c457503f | 30 | #include "syslog.h" |
5c0ca3ef | 31 | #include "tprintf.h" |
b02cd1e9 | 32 | |
c18e27ed | 33 | #include "machine/pte.h" |
896962b1 | 34 | #include "../vax/cpu.h" |
ff360633 JB |
35 | #include "ubareg.h" |
36 | #include "ubavar.h" | |
37 | #include "utreg.h" | |
b02cd1e9 | 38 | |
b02cd1e9 BJ |
39 | struct buf cutbuf[NUT]; /* bufs for control operations */ |
40 | struct buf tjutab[NTJ]; /* bufs for slave queue headers */ | |
41 | ||
42 | struct uba_ctlr *utminfo[NUT]; | |
43 | struct uba_device *tjdinfo[NTJ]; | |
407582e3 | 44 | int utprobe(), utslave(), utattach(), utdgo(), utintr(), uttimer(); |
b02cd1e9 BJ |
45 | u_short utstd[] = { 0772440, 0 }; |
46 | struct uba_driver utdriver = | |
47 | { utprobe, utslave, utattach, utdgo, utstd, "tj", tjdinfo, "ut", utminfo, 0 }; | |
48 | ||
6b0f2767 SL |
49 | #define MASKREG(reg) ((reg)&0xffff) |
50 | ||
b02cd1e9 BJ |
51 | /* bits in minor device */ |
52 | #define TJUNIT(dev) (minor(dev)&03) | |
53 | #define T_NOREWIND 04 | |
54 | #define T_1600BPI 010 | |
55 | #define T_6250BPI 020 | |
56 | short utdens[] = { UT_NRZI, UT_PE, UT_GCR, UT_NRZI }; | |
57 | ||
58 | /* slave to controller mapping table */ | |
59 | short tjtout[NTJ]; | |
60 | #define UTUNIT(dev) (tjtout[TJUNIT(dev)]) | |
61 | ||
62 | #define INF (daddr_t)1000000L /* a block number that wont exist */ | |
63 | ||
64 | struct tj_softc { | |
65 | char sc_openf; /* exclusive open */ | |
66 | char sc_lastiow; /* last I/O operation was a write */ | |
67 | daddr_t sc_blkno; /* next block to transfer */ | |
68 | daddr_t sc_nxrec; /* next record on tape */ | |
69 | u_short sc_erreg; /* image of uter */ | |
70 | u_short sc_dsreg; /* image of utds */ | |
c36079e2 | 71 | u_short sc_resid; /* residual from transfer */ |
b02cd1e9 | 72 | u_short sc_dens; /* sticky selected density */ |
407582e3 BJ |
73 | daddr_t sc_timo; /* time until timeout expires */ |
74 | short sc_tact; /* timeout is active flag */ | |
5c0ca3ef | 75 | tpr_t sc_tpr; /* tprintf handle */ |
c457503f MK |
76 | int sc_blks; /* number of I/O operations since open */ |
77 | int sc_softerrs; /* number of soft I/O errors since open */ | |
b02cd1e9 BJ |
78 | } tj_softc[NTJ]; |
79 | ||
80 | /* | |
81 | * Internal per/slave states found in sc_state | |
82 | */ | |
83 | #define SSEEK 1 /* seeking */ | |
84 | #define SIO 2 /* doing sequential I/O */ | |
85 | #define SCOM 3 /* sending a control command */ | |
86 | #define SREW 4 /* doing a rewind op */ | |
c36079e2 SL |
87 | #define SERASE 5 /* erase inter-record gap */ |
88 | #define SERASED 6 /* erased inter-record gap */ | |
b02cd1e9 | 89 | |
89b8a44c | 90 | /*ARGSUSED*/ |
b02cd1e9 BJ |
91 | utprobe(reg) |
92 | caddr_t reg; | |
93 | { | |
94 | register int br, cvec; | |
95 | #ifdef lint | |
96 | br=0; cvec=br; br=cvec; | |
89b8a44c | 97 | utintr(0); |
b02cd1e9 | 98 | #endif |
c36079e2 | 99 | /* |
e090266d BJ |
100 | * The SI documentation says you must set the RDY bit |
101 | * (even though it's read-only) to force an interrupt. | |
c36079e2 | 102 | */ |
e090266d | 103 | ((struct utdevice *) reg)->utcs1 = UT_IE|UT_NOP|UT_RDY; |
b02cd1e9 | 104 | DELAY(10000); |
9c0adba0 | 105 | return (sizeof (struct utdevice)); |
b02cd1e9 BJ |
106 | } |
107 | ||
108 | /*ARGSUSED*/ | |
109 | utslave(ui, reg) | |
110 | struct uba_device *ui; | |
111 | caddr_t reg; | |
112 | { | |
113 | /* | |
114 | * A real TU45 would support the slave present bit | |
115 | * int the drive type register, but this thing doesn't, | |
116 | * so there's no way to determine if a slave is present or not. | |
117 | */ | |
118 | return(1); | |
119 | } | |
120 | ||
121 | utattach(ui) | |
122 | struct uba_device *ui; | |
123 | { | |
124 | tjtout[ui->ui_unit] = ui->ui_mi->um_ctlr; | |
125 | } | |
126 | ||
127 | /* | |
128 | * Open the device with exclusive access. | |
129 | */ | |
130 | utopen(dev, flag) | |
131 | dev_t dev; | |
132 | int flag; | |
133 | { | |
134 | register int tjunit = TJUNIT(dev); | |
135 | register struct uba_device *ui; | |
136 | register struct tj_softc *sc; | |
c376c8e7 | 137 | int olddens, dens, error; |
2311123d | 138 | register int s; |
b02cd1e9 | 139 | |
1e6047bb | 140 | if (tjunit >= NTJ || (ui = tjdinfo[tjunit]) == 0 || ui->ui_alive == 0) |
7da157da | 141 | return (ENXIO); |
1e6047bb MK |
142 | if ((sc = &tj_softc[tjunit])->sc_openf) |
143 | return (EBUSY); | |
c457503f | 144 | sc->sc_openf = 1; |
b02cd1e9 | 145 | olddens = sc->sc_dens; |
7da157da BJ |
146 | dens = sc->sc_dens = |
147 | utdens[(minor(dev)&(T_1600BPI|T_6250BPI))>>3]| | |
148 | PDP11FMT|(ui->ui_slave&07); | |
b02cd1e9 BJ |
149 | get: |
150 | utcommand(dev, UT_SENSE, 1); | |
151 | if (sc->sc_dsreg&UTDS_PIP) { | |
c376c8e7 MK |
152 | if (error = tsleep((caddr_t)&lbolt, (PZERO+1) | PCATCH, |
153 | devopn, 0)) | |
154 | return (error); | |
b02cd1e9 BJ |
155 | goto get; |
156 | } | |
157 | sc->sc_dens = olddens; | |
158 | if ((sc->sc_dsreg&UTDS_MOL) == 0) { | |
c457503f | 159 | sc->sc_openf = 0; |
b02cd1e9 | 160 | uprintf("tj%d: not online\n", tjunit); |
7da157da | 161 | return (EIO); |
b02cd1e9 BJ |
162 | } |
163 | if ((flag&FWRITE) && (sc->sc_dsreg&UTDS_WRL)) { | |
c457503f | 164 | sc->sc_openf = 0; |
b02cd1e9 | 165 | uprintf("tj%d: no write ring\n", tjunit); |
7da157da | 166 | return (EIO); |
b02cd1e9 BJ |
167 | } |
168 | if ((sc->sc_dsreg&UTDS_BOT) == 0 && (flag&FWRITE) && | |
169 | dens != sc->sc_dens) { | |
c457503f | 170 | sc->sc_openf = 0; |
b02cd1e9 | 171 | uprintf("tj%d: can't change density in mid-tape\n", tjunit); |
7da157da | 172 | return (EIO); |
b02cd1e9 | 173 | } |
b02cd1e9 BJ |
174 | sc->sc_blkno = (daddr_t)0; |
175 | sc->sc_nxrec = INF; | |
176 | sc->sc_lastiow = 0; | |
c457503f MK |
177 | sc->sc_blks = 0; |
178 | sc->sc_softerrs = 0; | |
b02cd1e9 | 179 | sc->sc_dens = dens; |
5c0ca3ef | 180 | sc->sc_tpr = tprintf_open(); |
c36079e2 SL |
181 | /* |
182 | * For 6250 bpi take exclusive use of the UNIBUS. | |
183 | */ | |
184 | ui->ui_driver->ud_xclu = (dens&(T_1600BPI|T_6250BPI)) == T_6250BPI; | |
8011f5df | 185 | s = splclock(); |
407582e3 BJ |
186 | if (sc->sc_tact == 0) { |
187 | sc->sc_timo = INF; | |
188 | sc->sc_tact = 1; | |
189 | timeout(uttimer, (caddr_t)dev, 5*hz); | |
190 | } | |
2311123d | 191 | splx(s); |
7da157da | 192 | return (0); |
b02cd1e9 BJ |
193 | } |
194 | ||
195 | utclose(dev, flag) | |
196 | register dev_t dev; | |
197 | register flag; | |
198 | { | |
199 | register struct tj_softc *sc = &tj_softc[TJUNIT(dev)]; | |
200 | ||
201 | if (flag == FWRITE || ((flag&FWRITE) && sc->sc_lastiow)) { | |
202 | utcommand(dev, UT_WEOF, 1); | |
203 | utcommand(dev, UT_WEOF, 1); | |
204 | utcommand(dev, UT_SREV, 1); | |
205 | } | |
206 | if ((minor(dev)&T_NOREWIND) == 0) | |
207 | utcommand(dev, UT_REW, 0); | |
c457503f MK |
208 | if (sc->sc_blks > 100 && sc->sc_softerrs > sc->sc_blks / 100) |
209 | log(LOG_INFO, "tj%d: %d soft errors in %d blocks\n", | |
210 | TJUNIT(dev), sc->sc_softerrs, sc->sc_blks); | |
5c0ca3ef | 211 | tprintf_close(sc->sc_tpr); |
b02cd1e9 | 212 | sc->sc_openf = 0; |
c376c8e7 | 213 | return (0); |
b02cd1e9 BJ |
214 | } |
215 | ||
216 | utcommand(dev, com, count) | |
217 | dev_t dev; | |
218 | int com, count; | |
219 | { | |
220 | register struct buf *bp; | |
2311123d | 221 | register int s; |
b02cd1e9 BJ |
222 | |
223 | bp = &cutbuf[UTUNIT(dev)]; | |
2311123d | 224 | s = spl5(); |
b02cd1e9 BJ |
225 | while (bp->b_flags&B_BUSY) { |
226 | if(bp->b_repcnt == 0 && (bp->b_flags&B_DONE)) | |
227 | break; | |
228 | bp->b_flags |= B_WANTED; | |
229 | sleep((caddr_t)bp, PRIBIO); | |
230 | } | |
231 | bp->b_flags = B_BUSY|B_READ; | |
2311123d | 232 | splx(s); |
b02cd1e9 BJ |
233 | bp->b_dev = dev; |
234 | bp->b_command = com; | |
235 | bp->b_repcnt = count; | |
236 | bp->b_blkno = 0; | |
237 | utstrategy(bp); | |
238 | if (count == 0) | |
239 | return; | |
240 | iowait(bp); | |
241 | if (bp->b_flags&B_WANTED) | |
242 | wakeup((caddr_t)bp); | |
243 | bp->b_flags &= B_ERROR; | |
244 | } | |
245 | ||
246 | /* | |
247 | * Queue a tape operation. | |
248 | */ | |
249 | utstrategy(bp) | |
250 | register struct buf *bp; | |
251 | { | |
252 | int tjunit = TJUNIT(bp->b_dev); | |
253 | register struct uba_ctlr *um; | |
254 | register struct buf *dp; | |
5d4eae4d | 255 | int s; |
b02cd1e9 BJ |
256 | |
257 | /* | |
258 | * Put transfer at end of unit queue | |
259 | */ | |
260 | dp = &tjutab[tjunit]; | |
261 | bp->av_forw = NULL; | |
6c94015c | 262 | um = tjdinfo[tjunit]->ui_mi; |
5d4eae4d | 263 | s = spl5(); |
b02cd1e9 BJ |
264 | if (dp->b_actf == NULL) { |
265 | dp->b_actf = bp; | |
266 | /* | |
267 | * Transport not active, so... | |
268 | * put at end of controller queue | |
269 | */ | |
270 | dp->b_forw = NULL; | |
b02cd1e9 BJ |
271 | if (um->um_tab.b_actf == NULL) |
272 | um->um_tab.b_actf = dp; | |
273 | else | |
274 | um->um_tab.b_actl->b_forw = dp; | |
275 | um->um_tab.b_actl = dp; | |
276 | } else | |
277 | dp->b_actl->av_forw = bp; | |
278 | dp->b_actl = bp; | |
279 | /* | |
280 | * If the controller is not busy, set it going. | |
281 | */ | |
c36079e2 | 282 | if (um->um_tab.b_state == 0) |
b02cd1e9 | 283 | utstart(um); |
5d4eae4d | 284 | splx(s); |
b02cd1e9 BJ |
285 | } |
286 | ||
287 | utstart(um) | |
288 | register struct uba_ctlr *um; | |
289 | { | |
c36079e2 | 290 | register struct utdevice *addr; |
b02cd1e9 BJ |
291 | register struct buf *bp, *dp; |
292 | register struct tj_softc *sc; | |
293 | struct uba_device *ui; | |
294 | int tjunit; | |
295 | daddr_t blkno; | |
296 | ||
297 | loop: | |
298 | /* | |
299 | * Scan controller queue looking for units with | |
300 | * transaction queues to dispatch | |
301 | */ | |
302 | if ((dp = um->um_tab.b_actf) == NULL) | |
303 | return; | |
304 | if ((bp = dp->b_actf) == NULL) { | |
305 | um->um_tab.b_actf = dp->b_forw; | |
306 | goto loop; | |
307 | } | |
c36079e2 | 308 | addr = (struct utdevice *)um->um_addr; |
b02cd1e9 BJ |
309 | tjunit = TJUNIT(bp->b_dev); |
310 | ui = tjdinfo[tjunit]; | |
311 | sc = &tj_softc[tjunit]; | |
312 | /* note slave select, density, and format were merged on open */ | |
c36079e2 SL |
313 | addr->uttc = sc->sc_dens; |
314 | sc->sc_dsreg = addr->utds; | |
315 | sc->sc_erreg = addr->uter; | |
6b0f2767 | 316 | sc->sc_resid = MASKREG(addr->utfc); |
b02cd1e9 BJ |
317 | /* |
318 | * Default is that last command was NOT a write command; | |
319 | * if we do a write command we will notice this in utintr(). | |
320 | */ | |
321 | sc->sc_lastiow = 0; | |
c36079e2 | 322 | if (sc->sc_openf < 0 || (addr->utds&UTDS_MOL) == 0) { |
b02cd1e9 BJ |
323 | /* |
324 | * Have had a hard error on a non-raw tape | |
325 | * or the tape unit is now unavailable | |
326 | * (e.g. taken off line). | |
327 | */ | |
328 | bp->b_flags |= B_ERROR; | |
329 | goto next; | |
330 | } | |
331 | if (bp == &cutbuf[UTUNIT(bp->b_dev)]) { | |
332 | /* | |
333 | * Execute a control operation with the specified | |
334 | * count. | |
335 | */ | |
336 | if (bp->b_command == UT_SENSE) | |
337 | goto next; | |
6b0f2767 SL |
338 | if (bp->b_command == UT_SFORW && (addr->utds & UTDS_EOT)) { |
339 | bp->b_resid = bp->b_bcount; | |
340 | goto next; | |
341 | } | |
b02cd1e9 BJ |
342 | /* |
343 | * Set next state; handle timeouts | |
344 | */ | |
407582e3 | 345 | if (bp->b_command == UT_REW) { |
c36079e2 | 346 | um->um_tab.b_state = SREW; |
407582e3 BJ |
347 | sc->sc_timo = 5*60; |
348 | } else { | |
c36079e2 | 349 | um->um_tab.b_state = SCOM; |
407582e3 BJ |
350 | sc->sc_timo = imin(imax(10*(int)-bp->b_repcnt,60),5*60); |
351 | } | |
b02cd1e9 BJ |
352 | /* NOTE: this depends on the ut command values */ |
353 | if (bp->b_command >= UT_SFORW && bp->b_command <= UT_SREVF) | |
c36079e2 | 354 | addr->utfc = -bp->b_repcnt; |
b02cd1e9 BJ |
355 | goto dobpcmd; |
356 | } | |
357 | /* | |
5d4eae4d KB |
358 | * For raw I/O, save the current block |
359 | * number in case we have to retry. | |
b02cd1e9 | 360 | */ |
5d4eae4d KB |
361 | if (bp->b_flags & B_RAW) { |
362 | if (um->um_tab.b_errcnt == 0) { | |
363 | sc->sc_blkno = bdbtofsb(bp->b_blkno); | |
364 | sc->sc_nxrec = sc->sc_blkno + 1; | |
365 | } | |
b02cd1e9 | 366 | } |
5d4eae4d KB |
367 | else { |
368 | /* | |
369 | * Handle boundary cases for operation | |
370 | * on non-raw tapes. | |
371 | */ | |
372 | if (bdbtofsb(bp->b_blkno) > sc->sc_nxrec) { | |
373 | /* can't read past end of file */ | |
374 | bp->b_flags |= B_ERROR; | |
375 | bp->b_error = ENXIO; | |
376 | goto next; | |
377 | } | |
378 | if (bdbtofsb(bp->b_blkno) == sc->sc_nxrec && | |
379 | (bp->b_flags&B_READ)) { | |
380 | /* | |
381 | * Reading at end of file returns 0 bytes. | |
382 | */ | |
383 | bp->b_resid = bp->b_bcount; | |
384 | clrbuf(bp); | |
385 | goto next; | |
386 | } | |
387 | if ((bp->b_flags&B_READ) == 0) | |
388 | sc->sc_nxrec = bdbtofsb(bp->b_blkno) + 1; | |
b02cd1e9 | 389 | } |
b02cd1e9 BJ |
390 | /* |
391 | * If the tape is correctly positioned, set up all the | |
392 | * registers but the csr, and give control over to the | |
393 | * UNIBUS adaptor routines, to wait for resources to | |
394 | * start I/O. | |
395 | */ | |
fb739082 | 396 | if ((blkno = sc->sc_blkno) == bdbtofsb(bp->b_blkno)) { |
c36079e2 SL |
397 | addr->utwc = -(((bp->b_bcount)+1)>>1); |
398 | addr->utfc = -bp->b_bcount; | |
b02cd1e9 BJ |
399 | if ((bp->b_flags&B_READ) == 0) { |
400 | /* | |
401 | * On write error retries erase the | |
c36079e2 | 402 | * inter-record gap before rewriting. |
b02cd1e9 | 403 | */ |
c36079e2 | 404 | if (um->um_tab.b_errcnt) { |
c36079e2 | 405 | if (um->um_tab.b_state != SERASED) { |
64614526 | 406 | um->um_tab.b_state = SERASE; |
407582e3 | 407 | sc->sc_timo = 60; |
c36079e2 SL |
408 | addr->utcs1 = UT_ERASE|UT_IE|UT_GO; |
409 | return; | |
410 | } | |
c36079e2 | 411 | } |
6b0f2767 SL |
412 | if (addr->utds & UTDS_EOT) { |
413 | bp->b_resid = bp->b_bcount; | |
414 | um->um_tab.b_state = 0; | |
415 | goto next; | |
416 | } | |
c36079e2 | 417 | um->um_cmd = UT_WCOM; |
b02cd1e9 BJ |
418 | } else |
419 | um->um_cmd = UT_RCOM; | |
407582e3 | 420 | sc->sc_timo = 60; |
c36079e2 | 421 | um->um_tab.b_state = SIO; |
b02cd1e9 BJ |
422 | (void) ubago(ui); |
423 | return; | |
424 | } | |
425 | /* | |
426 | * Tape positioned incorrectly; seek forwards or | |
427 | * backwards to the correct spot. This happens for | |
428 | * raw tapes only on error retries. | |
429 | */ | |
c36079e2 | 430 | um->um_tab.b_state = SSEEK; |
fb739082 SL |
431 | if (blkno < bdbtofsb(bp->b_blkno)) { |
432 | addr->utfc = blkno - bdbtofsb(bp->b_blkno); | |
b02cd1e9 BJ |
433 | bp->b_command = UT_SFORW; |
434 | } else { | |
fb739082 | 435 | addr->utfc = bdbtofsb(bp->b_blkno) - blkno; |
b02cd1e9 BJ |
436 | bp->b_command = UT_SREV; |
437 | } | |
407582e3 | 438 | sc->sc_timo = imin(imax(10 * -addr->utfc, 60), 5*60); |
b02cd1e9 BJ |
439 | |
440 | dobpcmd: | |
441 | /* | |
442 | * Perform the command setup in bp. | |
443 | */ | |
c36079e2 | 444 | addr->utcs1 = bp->b_command|UT_IE|UT_GO; |
b02cd1e9 BJ |
445 | return; |
446 | next: | |
447 | /* | |
448 | * Advance to the next command in the slave queue, | |
449 | * posting notice and releasing resources as needed. | |
450 | */ | |
b02cd1e9 BJ |
451 | if (um->um_ubinfo) |
452 | ubadone(um); | |
453 | um->um_tab.b_errcnt = 0; | |
454 | dp->b_actf = bp->av_forw; | |
455 | iodone(bp); | |
456 | goto loop; | |
457 | } | |
458 | ||
459 | /* | |
460 | * Start operation on controller -- | |
461 | * UNIBUS resources have been allocated. | |
462 | */ | |
463 | utdgo(um) | |
464 | register struct uba_ctlr *um; | |
465 | { | |
466 | register struct utdevice *addr = (struct utdevice *)um->um_addr; | |
467 | ||
468 | addr->utba = (u_short) um->um_ubinfo; | |
6b0f2767 | 469 | addr->utcs1 = um->um_cmd|((um->um_ubinfo>>8)&0x300)|UT_IE|UT_GO; |
b02cd1e9 BJ |
470 | } |
471 | ||
472 | /* | |
473 | * Ut interrupt handler | |
474 | */ | |
475 | /*ARGSUSED*/ | |
476 | utintr(ut11) | |
477 | int ut11; | |
478 | { | |
479 | struct buf *dp; | |
480 | register struct buf *bp; | |
481 | register struct uba_ctlr *um = utminfo[ut11]; | |
482 | register struct utdevice *addr; | |
483 | register struct tj_softc *sc; | |
c36079e2 | 484 | u_short tjunit, cs2, cs1; |
b02cd1e9 BJ |
485 | register state; |
486 | ||
487 | if ((dp = um->um_tab.b_actf) == NULL) | |
488 | return; | |
489 | bp = dp->b_actf; | |
490 | tjunit = TJUNIT(bp->b_dev); | |
491 | addr = (struct utdevice *)tjdinfo[tjunit]->ui_addr; | |
492 | sc = &tj_softc[tjunit]; | |
493 | /* | |
494 | * Record status... | |
495 | */ | |
da9ebd7c | 496 | sc->sc_timo = INF; |
b02cd1e9 BJ |
497 | sc->sc_dsreg = addr->utds; |
498 | sc->sc_erreg = addr->uter; | |
6b0f2767 | 499 | sc->sc_resid = MASKREG(addr->utfc); |
c36079e2 | 500 | if ((bp->b_flags&B_READ) == 0) |
b02cd1e9 | 501 | sc->sc_lastiow = 1; |
c36079e2 SL |
502 | state = um->um_tab.b_state; |
503 | um->um_tab.b_state = 0; | |
b02cd1e9 BJ |
504 | /* |
505 | * Check for errors... | |
506 | */ | |
507 | if ((addr->utds&UTDS_ERR) || (addr->utcs1&UT_TRE)) { | |
64614526 BJ |
508 | /* |
509 | * To clear the ERR bit, we must issue a drive clear | |
510 | * command, and to clear the TRE bit we must set the | |
511 | * controller clear bit. | |
512 | */ | |
513 | cs2 = addr->utcs2; | |
514 | if ((cs1 = addr->utcs1)&UT_TRE) | |
515 | addr->utcs2 |= UTCS2_CLR; | |
516 | /* is this dangerous ?? */ | |
517 | while ((addr->utcs1&UT_RDY) == 0) | |
518 | ; | |
519 | addr->utcs1 = UT_CLEAR|UT_GO; | |
b02cd1e9 | 520 | /* |
6b0f2767 SL |
521 | * If we were reading at 1600 or 6250 bpi and the error |
522 | * was corrected, then don't consider this an error. | |
b02cd1e9 | 523 | */ |
452f8154 | 524 | if (sc->sc_erreg & UTER_COR && (bp->b_flags & B_READ) && |
6b0f2767 | 525 | (addr->uttc & UTTC_DEN) != UT_NRZI) { |
5c0ca3ef | 526 | tprintf(sc->sc_tpr, |
6b0f2767 SL |
527 | "ut%d: soft error bn%d cs1=%b er=%b cs2=%b ds=%b\n", |
528 | tjunit, bp->b_blkno, cs1, UT_BITS, sc->sc_erreg, | |
529 | UTER_BITS, cs2, UTCS2_BITS, sc->sc_dsreg, UTDS_BITS); | |
530 | sc->sc_erreg &= ~UTER_COR; | |
b02cd1e9 | 531 | } |
b02cd1e9 BJ |
532 | /* |
533 | * If we were reading from a raw tape and the only error | |
534 | * was that the record was too long, then we don't consider | |
535 | * this an error. | |
536 | */ | |
5d4eae4d | 537 | if ((bp->b_flags & (B_READ|B_RAW)) == (B_READ|B_RAW) && |
b02cd1e9 | 538 | (sc->sc_erreg&UTER_FCE)) |
6b0f2767 | 539 | sc->sc_erreg &= ~UTER_FCE; |
aaff71ec | 540 | if (sc->sc_erreg == 0) |
b02cd1e9 | 541 | goto ignoreerr; |
c36079e2 | 542 | /* |
6b0f2767 SL |
543 | * Fix up errors which occur due to backspacing |
544 | * "over" the front of the tape. | |
c36079e2 | 545 | */ |
6b0f2767 | 546 | if ((sc->sc_dsreg & UTDS_BOT) && bp->b_command == UT_SREV && |
c36079e2 SL |
547 | ((sc->sc_erreg &= ~(UTER_NEF|UTER_FCE)) == 0)) |
548 | goto opdone; | |
b02cd1e9 BJ |
549 | /* |
550 | * Retry soft errors up to 8 times | |
551 | */ | |
552 | if ((sc->sc_erreg&UTER_HARD) == 0 && state == SIO) { | |
553 | if (++um->um_tab.b_errcnt < 7) { | |
554 | sc->sc_blkno++; | |
555 | ubadone(um); | |
556 | goto opcont; | |
557 | } | |
6b0f2767 SL |
558 | } |
559 | /* | |
560 | * Hard or non-I/O errors on non-raw tape | |
561 | * cause it to close. | |
562 | */ | |
5d4eae4d | 563 | if ((bp->b_flags&B_RAW) == 0 && sc->sc_openf > 0) |
6b0f2767 | 564 | sc->sc_openf = -1; |
b02cd1e9 BJ |
565 | /* |
566 | * Couldn't recover error. | |
567 | */ | |
5c0ca3ef | 568 | tprintf(sc->sc_tpr, |
fe23e54e | 569 | "ut%d: hard error bn%d cs1=%b er=%b cs2=%b ds=%b\n", |
c36079e2 SL |
570 | tjunit, bp->b_blkno, cs1, UT_BITS, sc->sc_erreg, |
571 | UTER_BITS, cs2, UTCS2_BITS, sc->sc_dsreg, UTDS_BITS); | |
b02cd1e9 BJ |
572 | bp->b_flags |= B_ERROR; |
573 | goto opdone; | |
574 | } | |
6b0f2767 | 575 | |
b02cd1e9 | 576 | ignoreerr: |
6b0f2767 SL |
577 | /* |
578 | * If we hit a tape mark update our position. | |
579 | */ | |
580 | if (sc->sc_dsreg & UTDS_TM && bp->b_flags & B_READ) { | |
581 | /* | |
582 | * Set blkno and nxrec | |
583 | */ | |
584 | if (bp == &cutbuf[UTUNIT(bp->b_dev)]) { | |
585 | if (sc->sc_blkno > bdbtofsb(bp->b_blkno)) { | |
586 | sc->sc_nxrec = | |
587 | bdbtofsb(bp->b_blkno) - addr->utfc; | |
588 | sc->sc_blkno = sc->sc_nxrec; | |
589 | } else { | |
590 | sc->sc_blkno = | |
591 | bdbtofsb(bp->b_blkno) + addr->utfc; | |
592 | sc->sc_nxrec = sc->sc_blkno-1; | |
593 | } | |
594 | } else | |
595 | sc->sc_nxrec = bdbtofsb(bp->b_blkno); | |
596 | /* | |
597 | * Note: if we get a tape mark on a read, the | |
598 | * frame count register will be zero, so b_resid | |
599 | * will be calculated correctly below. | |
600 | */ | |
601 | goto opdone; | |
602 | } | |
b02cd1e9 BJ |
603 | /* |
604 | * Advance tape control FSM. | |
605 | */ | |
606 | switch (state) { | |
607 | ||
608 | case SIO: /* read/write increments tape block # */ | |
609 | sc->sc_blkno++; | |
c457503f MK |
610 | sc->sc_blks++; |
611 | if (um->um_tab.b_errcnt) | |
612 | sc->sc_softerrs++; | |
c36079e2 | 613 | break; |
b02cd1e9 | 614 | |
6b0f2767 | 615 | case SCOM: /* motion commands update current position */ |
b02cd1e9 | 616 | if (bp == &cutbuf[UTUNIT(bp->b_dev)]) |
9418508d | 617 | switch ((int)bp->b_command) { |
b02cd1e9 BJ |
618 | |
619 | case UT_SFORW: | |
620 | sc->sc_blkno -= bp->b_repcnt; | |
621 | break; | |
622 | ||
623 | case UT_SREV: | |
624 | sc->sc_blkno += bp->b_repcnt; | |
625 | break; | |
6b0f2767 SL |
626 | |
627 | case UT_REWOFFL: | |
628 | addr->utcs1 = UT_CLEAR|UT_GO; | |
629 | break; | |
b02cd1e9 | 630 | } |
c36079e2 | 631 | break; |
b02cd1e9 BJ |
632 | |
633 | case SSEEK: | |
fb739082 | 634 | sc->sc_blkno = bdbtofsb(bp->b_blkno); |
b02cd1e9 BJ |
635 | goto opcont; |
636 | ||
c36079e2 SL |
637 | case SERASE: |
638 | /* | |
639 | * Completed erase of the inter-record gap due to a | |
640 | * write error; now retry the write operation. | |
641 | */ | |
642 | um->um_tab.b_state = SERASED; | |
643 | goto opcont; | |
644 | ||
645 | case SREW: /* clear attention bit */ | |
646 | addr->utcs1 = UT_CLEAR|UT_GO; | |
647 | break; | |
648 | ||
b02cd1e9 | 649 | default: |
c36079e2 | 650 | printf("bad state %d\n", state); |
b02cd1e9 BJ |
651 | panic("utintr"); |
652 | } | |
653 | ||
654 | opdone: | |
655 | /* | |
656 | * Reset error count and remove | |
657 | * from device queue | |
658 | */ | |
659 | um->um_tab.b_errcnt = 0; | |
c36079e2 | 660 | dp->b_actf = bp->av_forw; |
6b0f2767 SL |
661 | /* |
662 | * For read command, frame count register contains | |
663 | * actual length of tape record. Otherwise, it | |
664 | * holds negative residual count. | |
665 | */ | |
666 | if (state == SIO && um->um_cmd == UT_RCOM) { | |
667 | bp->b_resid = 0; | |
668 | if (bp->b_bcount > MASKREG(addr->utfc)) | |
669 | bp->b_resid = bp->b_bcount - MASKREG(addr->utfc); | |
670 | } else | |
671 | bp->b_resid = MASKREG(-addr->utfc); | |
b02cd1e9 BJ |
672 | ubadone(um); |
673 | iodone(bp); | |
674 | /* | |
675 | * Circulate slave to end of controller queue | |
676 | * to give other slaves a chance | |
677 | */ | |
678 | um->um_tab.b_actf = dp->b_forw; | |
679 | if (dp->b_actf) { | |
680 | dp->b_forw = NULL; | |
681 | if (um->um_tab.b_actf == NULL) | |
682 | um->um_tab.b_actf = dp; | |
683 | else | |
684 | um->um_tab.b_actl->b_forw = dp; | |
685 | um->um_tab.b_actl = dp; | |
686 | } | |
687 | if (um->um_tab.b_actf == 0) | |
688 | return; | |
689 | opcont: | |
690 | utstart(um); | |
407582e3 BJ |
691 | } |
692 | ||
693 | /* | |
694 | * Watchdog timer routine. | |
695 | */ | |
696 | uttimer(dev) | |
697 | int dev; | |
698 | { | |
699 | register struct tj_softc *sc = &tj_softc[TJUNIT(dev)]; | |
afa0df56 | 700 | register short x; |
407582e3 BJ |
701 | |
702 | if (sc->sc_timo != INF && (sc->sc_timo -= 5) < 0) { | |
d6357dcf | 703 | printf("tj%d: lost interrupt\n", TJUNIT(dev)); |
407582e3 | 704 | sc->sc_timo = INF; |
afa0df56 | 705 | x = spl5(); |
407582e3 | 706 | utintr(UTUNIT(dev)); |
afa0df56 | 707 | (void) splx(x); |
407582e3 BJ |
708 | } |
709 | timeout(uttimer, (caddr_t)dev, 5*hz); | |
b02cd1e9 BJ |
710 | } |
711 | ||
b02cd1e9 | 712 | /*ARGSUSED*/ |
942f05a9 | 713 | utioctl(dev, cmd, data, flag) |
b02cd1e9 | 714 | dev_t dev; |
942f05a9 | 715 | caddr_t data; |
b02cd1e9 BJ |
716 | { |
717 | register struct tj_softc *sc = &tj_softc[TJUNIT(dev)]; | |
718 | register struct buf *bp = &cutbuf[UTUNIT(dev)]; | |
719 | register callcount; | |
64389b40 | 720 | int fcount, error = 0; |
942f05a9 SL |
721 | struct mtop *mtop; |
722 | struct mtget *mtget; | |
b02cd1e9 BJ |
723 | /* we depend of the values and order of the MT codes here */ |
724 | static utops[] = | |
725 | {UT_WEOF,UT_SFORWF,UT_SREVF,UT_SFORW,UT_SREV,UT_REW,UT_REWOFFL,UT_SENSE}; | |
726 | ||
727 | switch (cmd) { | |
728 | ||
729 | case MTIOCTOP: | |
942f05a9 SL |
730 | mtop = (struct mtop *)data; |
731 | switch(mtop->mt_op) { | |
b02cd1e9 BJ |
732 | |
733 | case MTWEOF: | |
b02cd1e9 BJ |
734 | case MTFSF: case MTBSF: |
735 | case MTFSR: case MTBSR: | |
d8ec6d6b SL |
736 | callcount = mtop->mt_count; |
737 | fcount = 1; | |
b02cd1e9 BJ |
738 | break; |
739 | ||
740 | case MTREW: case MTOFFL: case MTNOP: | |
741 | callcount = 1; | |
742 | fcount = 1; | |
743 | break; | |
744 | ||
745 | default: | |
7da157da | 746 | return (ENXIO); |
b02cd1e9 | 747 | } |
7da157da BJ |
748 | if (callcount <= 0 || fcount <= 0) |
749 | return (EINVAL); | |
b02cd1e9 | 750 | while (--callcount >= 0) { |
942f05a9 | 751 | utcommand(dev, utops[mtop->mt_op], fcount); |
b02cd1e9 BJ |
752 | if ((bp->b_flags&B_ERROR) || (sc->sc_dsreg&UTDS_BOT)) |
753 | break; | |
754 | } | |
64389b40 KS |
755 | if (bp->b_flags&B_ERROR) |
756 | if ((error = bp->b_error)==0) | |
757 | return (EIO); | |
758 | return (error); | |
b02cd1e9 BJ |
759 | |
760 | case MTIOCGET: | |
942f05a9 SL |
761 | mtget = (struct mtget *)data; |
762 | mtget->mt_dsreg = sc->sc_dsreg; | |
763 | mtget->mt_erreg = sc->sc_erreg; | |
764 | mtget->mt_resid = sc->sc_resid; | |
765 | mtget->mt_type = MT_ISUT; | |
7da157da | 766 | break; |
b02cd1e9 BJ |
767 | |
768 | default: | |
7da157da | 769 | return (ENXIO); |
b02cd1e9 | 770 | } |
7da157da | 771 | return (0); |
b02cd1e9 BJ |
772 | } |
773 | ||
774 | utreset(uban) | |
775 | int uban; | |
776 | { | |
777 | register struct uba_ctlr *um; | |
778 | register ut11, tjunit; | |
779 | register struct uba_device *ui; | |
780 | register struct buf *dp; | |
781 | ||
782 | for (ut11 = 0; ut11 < NUT; ut11++) { | |
783 | if ((um = utminfo[ut11]) == 0 || um->um_alive == 0 || | |
784 | um->um_ubanum != uban) | |
785 | continue; | |
786 | printf(" ut%d", ut11); | |
c36079e2 | 787 | um->um_tab.b_state = 0; |
b02cd1e9 BJ |
788 | um->um_tab.b_actf = um->um_tab.b_actl = 0; |
789 | if (um->um_ubinfo) { | |
790 | printf("<%d>", (um->um_ubinfo>>28)&0xf); | |
96b997eb | 791 | um->um_ubinfo = 0; |
b02cd1e9 BJ |
792 | } |
793 | ((struct utdevice *)(um->um_addr))->utcs1 = UT_CLEAR|UT_GO; | |
c36079e2 | 794 | ((struct utdevice *)(um->um_addr))->utcs2 |= UTCS2_CLR; |
b02cd1e9 BJ |
795 | for (tjunit = 0; tjunit < NTJ; tjunit++) { |
796 | if ((ui = tjdinfo[tjunit]) == 0 || ui->ui_mi != um || | |
797 | ui->ui_alive == 0) | |
798 | continue; | |
799 | dp = &tjutab[tjunit]; | |
c36079e2 | 800 | dp->b_state = 0; |
b02cd1e9 BJ |
801 | dp->b_forw = 0; |
802 | if (um->um_tab.b_actf == NULL) | |
803 | um->um_tab.b_actf = dp; | |
804 | else | |
805 | um->um_tab.b_actl->b_forw = dp; | |
806 | um->um_tab.b_actl = dp; | |
807 | if (tj_softc[tjunit].sc_openf > 0) | |
808 | tj_softc[tjunit].sc_openf = -1; | |
809 | } | |
810 | utstart(um); | |
811 | } | |
812 | } | |
813 | ||
814 | /* | |
815 | * Do a stand-alone core dump to tape -- | |
816 | * from here down, routines are used only in dump context | |
817 | */ | |
818 | #define DBSIZE 20 | |
819 | ||
820 | utdump() | |
821 | { | |
822 | register struct uba_device *ui; | |
823 | register struct uba_regs *up; | |
c36079e2 | 824 | register struct utdevice *addr; |
b02cd1e9 BJ |
825 | int blk, num = maxfree; |
826 | int start = 0; | |
827 | ||
828 | #define phys(a,b) ((b)((int)(a)&0x7fffffff)) | |
829 | if (tjdinfo[0] == 0) | |
830 | return (ENXIO); | |
831 | ui = phys(tjdinfo[0], struct uba_device *); | |
832 | up = phys(ui->ui_hd, struct uba_hd *)->uh_physuba; | |
89b8a44c | 833 | ubainit(up); |
b02cd1e9 | 834 | DELAY(1000000); |
c36079e2 | 835 | addr = (struct utdevice *)ui->ui_physaddr; |
89b8a44c | 836 | utwait(addr); |
c36079e2 SL |
837 | /* |
838 | * Be sure to set the appropriate density here. We use | |
839 | * 6250, but maybe it should be done at 1600 to insure the | |
840 | * tape can be read by most any other tape drive available. | |
841 | */ | |
842 | addr->uttc = UT_GCR|PDP11FMT; /* implicit slave 0 or-ed in */ | |
843 | addr->utcs1 = UT_CLEAR|UT_GO; | |
b02cd1e9 BJ |
844 | while (num > 0) { |
845 | blk = num > DBSIZE ? DBSIZE : num; | |
c36079e2 SL |
846 | utdwrite(start, blk, addr, up); |
847 | if ((addr->utds&UTDS_ERR) || (addr->utcs1&UT_TRE)) | |
848 | return(EIO); | |
b02cd1e9 BJ |
849 | start += blk; |
850 | num -= blk; | |
851 | } | |
c36079e2 SL |
852 | uteof(addr); |
853 | uteof(addr); | |
854 | utwait(addr); | |
855 | if ((addr->utds&UTDS_ERR) || (addr->utcs1&UT_TRE)) | |
b02cd1e9 | 856 | return(EIO); |
c36079e2 | 857 | addr->utcs1 = UT_REW|UT_GO; |
b02cd1e9 BJ |
858 | return (0); |
859 | } | |
860 | ||
c36079e2 | 861 | utdwrite(dbuf, num, addr, up) |
b02cd1e9 | 862 | register dbuf, num; |
c36079e2 | 863 | register struct utdevice *addr; |
b02cd1e9 BJ |
864 | struct uba_regs *up; |
865 | { | |
866 | register struct pte *io; | |
867 | register int npf; | |
868 | ||
c36079e2 | 869 | utwait(addr); |
b02cd1e9 BJ |
870 | io = up->uba_map; |
871 | npf = num + 1; | |
872 | while (--npf != 0) | |
873 | *(int *)io++ = (dbuf++ | (1<<UBAMR_DPSHIFT) | UBAMR_MRV); | |
874 | *(int *)io = 0; | |
c36079e2 SL |
875 | addr->utwc = -((num*NBPG)>>1); |
876 | addr->utfc = -(num*NBPG); | |
877 | addr->utba = 0; | |
878 | addr->utcs1 = UT_WCOM|UT_GO; | |
b02cd1e9 BJ |
879 | } |
880 | ||
c36079e2 SL |
881 | utwait(addr) |
882 | struct utdevice *addr; | |
b02cd1e9 BJ |
883 | { |
884 | register s; | |
885 | ||
886 | do | |
c36079e2 | 887 | s = addr->utds; |
b02cd1e9 BJ |
888 | while ((s&UTDS_DRY) == 0); |
889 | } | |
890 | ||
c36079e2 SL |
891 | uteof(addr) |
892 | struct utdevice *addr; | |
b02cd1e9 BJ |
893 | { |
894 | ||
c36079e2 SL |
895 | utwait(addr); |
896 | addr->utcs1 = UT_WEOF|UT_GO; | |
b02cd1e9 BJ |
897 | } |
898 | #endif |