Commit | Line | Data |
---|---|---|
c27ba986 | 1 | /* tm.c 4.37 81/04/28 */ |
d75e5c3e | 2 | |
443c8066 | 3 | #include "te.h" |
23e0e9b8 | 4 | #include "ts.h" |
afb907f2 | 5 | #if NTM > 0 |
d75e5c3e | 6 | /* |
afb907f2 | 7 | * TM11/TE10 tape driver |
7e00c42b | 8 | * |
d565635a BJ |
9 | * TODO: |
10 | * test driver with more than one slave | |
11 | * test driver with more than one controller | |
12 | * test reset code | |
d565635a BJ |
13 | * what happens if you offline tape during rewind? |
14 | * test using file system on tape | |
d75e5c3e | 15 | */ |
d75e5c3e | 16 | #include "../h/param.h" |
27a897a2 | 17 | #include "../h/systm.h" |
d75e5c3e BJ |
18 | #include "../h/buf.h" |
19 | #include "../h/dir.h" | |
20 | #include "../h/conf.h" | |
21 | #include "../h/user.h" | |
22 | #include "../h/file.h" | |
23 | #include "../h/map.h" | |
24 | #include "../h/pte.h" | |
e4271c68 | 25 | #include "../h/vm.h" |
89bd2f01 BJ |
26 | #include "../h/ubareg.h" |
27 | #include "../h/ubavar.h" | |
d75e5c3e BJ |
28 | #include "../h/mtio.h" |
29 | #include "../h/ioctl.h" | |
7455bf3e | 30 | #include "../h/cmap.h" |
3f3a34c3 | 31 | #include "../h/cpu.h" |
d75e5c3e | 32 | |
3f3a34c3 | 33 | #include "../h/tmreg.h" |
d75e5c3e | 34 | |
d565635a BJ |
35 | /* |
36 | * There is a ctmbuf per tape controller. | |
37 | * It is used as the token to pass to the internal routines | |
38 | * to execute tape ioctls, and also acts as a lock on the slaves | |
39 | * on the controller, since there is only one per controller. | |
40 | * In particular, when the tape is rewinding on close we release | |
41 | * the user process but any further attempts to use the tape drive | |
42 | * before the rewind completes will hang waiting for ctmbuf. | |
43 | */ | |
44 | struct buf ctmbuf[NTM]; | |
45 | ||
46 | /* | |
47 | * Raw tape operations use rtmbuf. The driver | |
48 | * notices when rtmbuf is being used and allows the user | |
49 | * program to continue after errors and read records | |
50 | * not of the standard length (BSIZE). | |
51 | */ | |
52 | struct buf rtmbuf[NTM]; | |
d75e5c3e | 53 | |
d565635a BJ |
54 | /* |
55 | * Driver unibus interface routines and variables. | |
56 | */ | |
71236e46 | 57 | int tmprobe(), tmslave(), tmattach(), tmdgo(), tmintr(); |
89bd2f01 | 58 | struct uba_ctlr *tmminfo[NTM]; |
d565635a BJ |
59 | struct uba_device *tedinfo[NTE]; |
60 | struct buf teutab[NTE]; | |
61 | short tetotm[NTE]; | |
d763a2b7 | 62 | u_short tmstd[] = { 0772520, 0 }; |
3f3a34c3 | 63 | struct uba_driver tmdriver = |
d565635a | 64 | { tmprobe, tmslave, tmattach, tmdgo, tmstd, "te", tedinfo, "tm", tmminfo, 0 }; |
d75e5c3e BJ |
65 | |
66 | /* bits in minor device */ | |
d565635a BJ |
67 | #define TEUNIT(dev) (minor(dev)&03) |
68 | #define TMUNIT(dev) (tetotm[TEUNIT(dev)]) | |
d75e5c3e BJ |
69 | #define T_NOREWIND 04 |
70 | #define T_1600BPI 08 | |
71 | ||
72 | #define INF (daddr_t)1000000L | |
73 | ||
71236e46 BJ |
74 | /* |
75 | * Software state per tape transport. | |
d565635a BJ |
76 | * |
77 | * 1. A tape drive is a unique-open device; we refuse opens when it is already. | |
78 | * 2. We keep track of the current position on a block tape and seek | |
79 | * before operations by forward/back spacing if necessary. | |
80 | * 3. We remember if the last operation was a write on a tape, so if a tape | |
81 | * is open read write and the last thing done is a write we can | |
82 | * write a standard end of tape mark (two eofs). | |
83 | * 4. We remember the status registers after the last command, using | |
84 | * then internally and returning them to the SENSE ioctl. | |
85 | * 5. We remember the last density the tape was used at. If it is | |
86 | * not a BOT when we start using it and we are writing, we don't | |
87 | * let the density be changed. | |
71236e46 | 88 | */ |
d565635a | 89 | struct te_softc { |
71236e46 BJ |
90 | char sc_openf; /* lock against multiple opens */ |
91 | char sc_lastiow; /* last op was a write */ | |
92 | daddr_t sc_blkno; /* block number, for block device tape */ | |
d565635a | 93 | daddr_t sc_nxrec; /* position of end of tape, if known */ |
71236e46 BJ |
94 | u_short sc_erreg; /* copy of last erreg */ |
95 | u_short sc_dsreg; /* copy of last dsreg */ | |
96 | short sc_resid; /* copy of last bc */ | |
a0eab615 | 97 | #ifdef unneeded |
d1330646 | 98 | short sc_lastcmd; /* last command to handle direction changes */ |
80905075 | 99 | #endif |
d565635a | 100 | u_short sc_dens; /* prototype command with density info */ |
a752fee0 BJ |
101 | daddr_t sc_timo; /* time until timeout expires */ |
102 | short sc_tact; /* timeout is active */ | |
d565635a | 103 | } te_softc[NTM]; |
a0eab615 BJ |
104 | #ifdef unneeded |
105 | int tmgapsdcnt; /* DEBUG */ | |
106 | #endif | |
d75e5c3e | 107 | |
71236e46 | 108 | /* |
d565635a BJ |
109 | * States for um->um_tab.b_active, the per controller state flag. |
110 | * This is used to sequence control in the driver. | |
71236e46 | 111 | */ |
d75e5c3e BJ |
112 | #define SSEEK 1 /* seeking */ |
113 | #define SIO 2 /* doing seq i/o */ | |
114 | #define SCOM 3 /* sending control command */ | |
71236e46 | 115 | #define SREW 4 /* sending a drive rewind */ |
d75e5c3e | 116 | |
23e0e9b8 BJ |
117 | #if NTS > 0 |
118 | /* | |
119 | * Kludge to get around fact that we don't really | |
120 | * check if a ts is there... if there are both tm's and ts's | |
121 | * declared in the system, then this driver sets havetm to 1 | |
122 | * if it finds a tm, and ts just pretends there isn't a ts. | |
123 | */ | |
124 | int havetm = 0; | |
125 | #endif | |
5aa9d5ea RE |
126 | /* |
127 | * Determine if there is a controller for | |
128 | * a tm at address reg. Our goal is to make the | |
129 | * device interrupt. | |
5aa9d5ea | 130 | */ |
71236e46 | 131 | tmprobe(reg) |
3f3a34c3 BJ |
132 | caddr_t reg; |
133 | { | |
d565635a | 134 | register int br, cvec; /* must be r11,r10; value-result */ |
5aa9d5ea | 135 | |
71236e46 | 136 | #ifdef lint |
a0eab615 | 137 | br = 0; cvec = br; br = cvec; |
71236e46 BJ |
138 | #endif |
139 | ((struct device *)reg)->tmcs = TM_IE; | |
3f3a34c3 | 140 | /* |
afb907f2 | 141 | * If this is a tm11, it ought to have interrupted |
3f3a34c3 | 142 | * by now, if it isn't (ie: it is a ts04) then we just |
d763a2b7 BJ |
143 | * hope that it didn't interrupt, so autoconf will ignore it. |
144 | * Just in case, we will reference one | |
3f3a34c3 | 145 | * of the more distant registers, and hope for a machine |
d763a2b7 | 146 | * check, or similar disaster if this is a ts. |
7e00c42b BJ |
147 | * |
148 | * Note: on an 11/780, badaddr will just generate | |
149 | * a uba error for a ts; but our caller will notice that | |
150 | * so we won't check for it. | |
3f3a34c3 | 151 | */ |
a0eab615 | 152 | if (badaddr((caddr_t)&((struct device *)reg)->tmrd, 2)) |
d763a2b7 BJ |
153 | return (0); |
154 | return (1); | |
3f3a34c3 BJ |
155 | } |
156 | ||
71236e46 BJ |
157 | /* |
158 | * Due to a design flaw, we cannot ascertain if the tape | |
159 | * exists or not unless it is on line - ie: unless a tape is | |
160 | * mounted. This is too servere a restriction to bear, | |
161 | * so all units are assumed to exist. | |
162 | */ | |
163 | /*ARGSUSED*/ | |
e4271c68 | 164 | tmslave(ui, reg) |
89bd2f01 | 165 | struct uba_device *ui; |
3f3a34c3 BJ |
166 | caddr_t reg; |
167 | { | |
d763a2b7 | 168 | |
d763a2b7 | 169 | return (1); |
3f3a34c3 BJ |
170 | } |
171 | ||
71236e46 | 172 | /* |
d565635a | 173 | * Record attachment of the unit to the controller. |
71236e46 BJ |
174 | */ |
175 | /*ARGSUSED*/ | |
176 | tmattach(ui) | |
89bd2f01 | 177 | struct uba_device *ui; |
71236e46 BJ |
178 | { |
179 | ||
23e0e9b8 BJ |
180 | #if NTS > 0 |
181 | havetm = 1; | |
182 | #endif | |
d565635a BJ |
183 | /* |
184 | * Tetotm is used in TMUNIT to index the ctmbuf and rtmbuf | |
185 | * arrays given a te unit number. | |
186 | */ | |
187 | tetotm[ui->ui_unit] = ui->ui_mi->um_ctlr; | |
71236e46 BJ |
188 | } |
189 | ||
a752fee0 | 190 | int tmtimer(); |
71236e46 BJ |
191 | /* |
192 | * Open the device. Tapes are unique open | |
193 | * devices, so we refuse if it is already open. | |
194 | * We also check that a tape is available, and | |
d565635a BJ |
195 | * don't block waiting here; if you want to wait |
196 | * for a tape you should timeout in user code. | |
71236e46 | 197 | */ |
d75e5c3e BJ |
198 | tmopen(dev, flag) |
199 | dev_t dev; | |
200 | int flag; | |
201 | { | |
d565635a | 202 | register int teunit; |
89bd2f01 | 203 | register struct uba_device *ui; |
d565635a | 204 | register struct te_softc *sc; |
971424d9 | 205 | int olddens, dens; |
d75e5c3e | 206 | |
d565635a BJ |
207 | teunit = TEUNIT(dev); |
208 | if (teunit>=NTE || (sc = &te_softc[teunit])->sc_openf || | |
209 | (ui = tedinfo[teunit]) == 0 || ui->ui_alive == 0) { | |
71236e46 | 210 | u.u_error = ENXIO; |
d75e5c3e BJ |
211 | return; |
212 | } | |
971424d9 BJ |
213 | olddens = sc->sc_dens; |
214 | dens = TM_IE | TM_GO | (ui->ui_slave << 8); | |
215 | if ((minor(dev) & T_1600BPI) == 0) | |
216 | dens |= TM_D800; | |
217 | sc->sc_dens = dens; | |
27a897a2 | 218 | get: |
71236e46 | 219 | tmcommand(dev, TM_SENSE, 1); |
27a897a2 BJ |
220 | if (sc->sc_erreg&TMER_SDWN) { |
221 | sleep((caddr_t)&lbolt, PZERO+1); | |
222 | goto get; | |
223 | } | |
971424d9 | 224 | sc->sc_dens = olddens; |
d565635a | 225 | if ((sc->sc_erreg&(TMER_SELR|TMER_TUR)) != (TMER_SELR|TMER_TUR) || |
4fd4cf52 | 226 | (flag&FWRITE) && (sc->sc_erreg&TMER_WRL) || |
d565635a | 227 | (sc->sc_erreg&TMER_BOT) == 0 && (flag&FWRITE) && |
4fd4cf52 | 228 | dens != sc->sc_dens) { |
d565635a BJ |
229 | /* |
230 | * Not online or density switch in mid-tape or write locked. | |
231 | */ | |
71236e46 | 232 | u.u_error = EIO; |
d75e5c3e BJ |
233 | return; |
234 | } | |
71236e46 | 235 | sc->sc_openf = 1; |
7e00c42b BJ |
236 | sc->sc_blkno = (daddr_t)0; |
237 | sc->sc_nxrec = INF; | |
71236e46 | 238 | sc->sc_lastiow = 0; |
d565635a | 239 | sc->sc_dens = dens; |
a752fee0 BJ |
240 | (void) spl6(); |
241 | if (sc->sc_tact == 0) { | |
242 | sc->sc_timo = INF; | |
243 | sc->sc_tact = 1; | |
c27ba986 | 244 | timeout(tmtimer, (caddr_t)dev, 5*hz); |
a752fee0 BJ |
245 | } |
246 | (void) spl0(); | |
d75e5c3e BJ |
247 | } |
248 | ||
71236e46 BJ |
249 | /* |
250 | * Close tape device. | |
251 | * | |
252 | * If tape was open for writing or last operation was | |
253 | * a write, then write two EOF's and backspace over the last one. | |
254 | * Unless this is a non-rewinding special file, rewind the tape. | |
255 | * Make the tape available to others. | |
256 | */ | |
d75e5c3e BJ |
257 | tmclose(dev, flag) |
258 | register dev_t dev; | |
259 | register flag; | |
260 | { | |
d565635a | 261 | register struct te_softc *sc = &te_softc[TEUNIT(dev)]; |
d75e5c3e | 262 | |
71236e46 BJ |
263 | if (flag == FWRITE || (flag&FWRITE) && sc->sc_lastiow) { |
264 | tmcommand(dev, TM_WEOF, 1); | |
265 | tmcommand(dev, TM_WEOF, 1); | |
266 | tmcommand(dev, TM_SREV, 1); | |
d75e5c3e BJ |
267 | } |
268 | if ((minor(dev)&T_NOREWIND) == 0) | |
d565635a BJ |
269 | /* |
270 | * 0 count means don't hang waiting for rewind complete | |
271 | * rather ctmbuf stays busy until the operation completes | |
272 | * preventing further opens from completing by | |
273 | * preventing a TM_SENSE from completing. | |
274 | */ | |
275 | tmcommand(dev, TM_REW, 0); | |
7e00c42b | 276 | sc->sc_openf = 0; |
d75e5c3e BJ |
277 | } |
278 | ||
71236e46 BJ |
279 | /* |
280 | * Execute a command on the tape drive | |
281 | * a specified number of times. | |
282 | */ | |
e4271c68 | 283 | tmcommand(dev, com, count) |
d75e5c3e BJ |
284 | dev_t dev; |
285 | int com, count; | |
286 | { | |
287 | register struct buf *bp; | |
288 | ||
71236e46 | 289 | bp = &ctmbuf[TMUNIT(dev)]; |
d75e5c3e BJ |
290 | (void) spl5(); |
291 | while (bp->b_flags&B_BUSY) { | |
d565635a BJ |
292 | /* |
293 | * This special check is because B_BUSY never | |
294 | * gets cleared in the non-waiting rewind case. | |
295 | */ | |
27a897a2 | 296 | if (bp->b_repcnt == 0 && (bp->b_flags&B_DONE)) |
d565635a | 297 | break; |
d75e5c3e BJ |
298 | bp->b_flags |= B_WANTED; |
299 | sleep((caddr_t)bp, PRIBIO); | |
300 | } | |
301 | bp->b_flags = B_BUSY|B_READ; | |
302 | (void) spl0(); | |
303 | bp->b_dev = dev; | |
304 | bp->b_repcnt = -count; | |
305 | bp->b_command = com; | |
306 | bp->b_blkno = 0; | |
307 | tmstrategy(bp); | |
d565635a BJ |
308 | /* |
309 | * In case of rewind from close, don't wait. | |
310 | * This is the only case where count can be 0. | |
311 | */ | |
312 | if (count == 0) | |
313 | return; | |
d75e5c3e BJ |
314 | iowait(bp); |
315 | if (bp->b_flags&B_WANTED) | |
316 | wakeup((caddr_t)bp); | |
317 | bp->b_flags &= B_ERROR; | |
318 | } | |
319 | ||
71236e46 | 320 | /* |
d565635a | 321 | * Queue a tape operation. |
71236e46 | 322 | */ |
d75e5c3e BJ |
323 | tmstrategy(bp) |
324 | register struct buf *bp; | |
325 | { | |
d565635a | 326 | int teunit = TEUNIT(bp->b_dev); |
89bd2f01 | 327 | register struct uba_ctlr *um; |
71236e46 | 328 | register struct buf *dp; |
d75e5c3e | 329 | |
71236e46 BJ |
330 | /* |
331 | * Put transfer at end of unit queue | |
332 | */ | |
d565635a | 333 | dp = &teutab[teunit]; |
d75e5c3e BJ |
334 | bp->av_forw = NULL; |
335 | (void) spl5(); | |
71236e46 BJ |
336 | if (dp->b_actf == NULL) { |
337 | dp->b_actf = bp; | |
338 | /* | |
339 | * Transport not already active... | |
340 | * put at end of controller queue. | |
341 | */ | |
342 | dp->b_forw = NULL; | |
d565635a | 343 | um = tedinfo[teunit]->ui_mi; |
71236e46 BJ |
344 | if (um->um_tab.b_actf == NULL) |
345 | um->um_tab.b_actf = dp; | |
346 | else | |
347 | um->um_tab.b_actl->b_forw = dp; | |
348 | um->um_tab.b_actl = dp; | |
349 | } else | |
350 | dp->b_actl->av_forw = bp; | |
351 | dp->b_actl = bp; | |
352 | /* | |
353 | * If the controller is not busy, get | |
354 | * it going. | |
355 | */ | |
356 | if (um->um_tab.b_active == 0) | |
357 | tmstart(um); | |
d75e5c3e BJ |
358 | (void) spl0(); |
359 | } | |
360 | ||
71236e46 BJ |
361 | /* |
362 | * Start activity on a tm controller. | |
363 | */ | |
364 | tmstart(um) | |
89bd2f01 | 365 | register struct uba_ctlr *um; |
d75e5c3e | 366 | { |
71236e46 BJ |
367 | register struct buf *bp, *dp; |
368 | register struct device *addr = (struct device *)um->um_addr; | |
d565635a | 369 | register struct te_softc *sc; |
89bd2f01 | 370 | register struct uba_device *ui; |
d565635a | 371 | int teunit, cmd; |
7e00c42b | 372 | daddr_t blkno; |
d75e5c3e | 373 | |
71236e46 BJ |
374 | /* |
375 | * Look for an idle transport on the controller. | |
376 | */ | |
d75e5c3e | 377 | loop: |
71236e46 | 378 | if ((dp = um->um_tab.b_actf) == NULL) |
d75e5c3e | 379 | return; |
71236e46 BJ |
380 | if ((bp = dp->b_actf) == NULL) { |
381 | um->um_tab.b_actf = dp->b_forw; | |
382 | goto loop; | |
383 | } | |
d565635a BJ |
384 | teunit = TEUNIT(bp->b_dev); |
385 | ui = tedinfo[teunit]; | |
71236e46 BJ |
386 | /* |
387 | * Record pre-transfer status (e.g. for TM_SENSE) | |
388 | */ | |
d565635a | 389 | sc = &te_softc[teunit]; |
71236e46 BJ |
390 | addr = (struct device *)um->um_addr; |
391 | addr->tmcs = (ui->ui_slave << 8); | |
7e00c42b BJ |
392 | sc->sc_dsreg = addr->tmcs; |
393 | sc->sc_erreg = addr->tmer; | |
394 | sc->sc_resid = addr->tmbc; | |
71236e46 BJ |
395 | /* |
396 | * Default is that last command was NOT a write command; | |
397 | * if we do a write command we will notice this in tmintr(). | |
398 | */ | |
bc9da2ca | 399 | sc->sc_lastiow = 0; |
71236e46 BJ |
400 | if (sc->sc_openf < 0 || (addr->tmcs&TM_CUR) == 0) { |
401 | /* | |
d565635a BJ |
402 | * Have had a hard error on a non-raw tape |
403 | * or the tape unit is now unavailable | |
404 | * (e.g. taken off line). | |
71236e46 BJ |
405 | */ |
406 | bp->b_flags |= B_ERROR; | |
d75e5c3e BJ |
407 | goto next; |
408 | } | |
d565635a BJ |
409 | if (bp == &ctmbuf[TMUNIT(bp->b_dev)]) { |
410 | /* | |
411 | * Execute control operation with the specified count. | |
412 | */ | |
71236e46 BJ |
413 | if (bp->b_command == TM_SENSE) |
414 | goto next; | |
a752fee0 BJ |
415 | /* |
416 | * Set next state; give 5 minutes to complete | |
417 | * rewind, or 10 seconds per iteration (minimum 60 | |
c27ba986 | 418 | * seconds and max 5 minutes) to complete other ops. |
a752fee0 BJ |
419 | */ |
420 | if (bp->b_command == TM_REW) { | |
421 | um->um_tab.b_active = SREW; | |
422 | sc->sc_timo = 5 * 60; | |
423 | } else { | |
424 | um->um_tab.b_active = SCOM; | |
c27ba986 | 425 | sc->sc_timo = imin(imax(10 * bp->b_repcnt, 60), 5*60); |
a752fee0 | 426 | } |
71236e46 BJ |
427 | if (bp->b_command == TM_SFORW || bp->b_command == TM_SREV) |
428 | addr->tmbc = bp->b_repcnt; | |
d1330646 | 429 | goto dobpcmd; |
71236e46 | 430 | } |
d565635a BJ |
431 | /* |
432 | * The following checks handle boundary cases for operation | |
433 | * on non-raw tapes. On raw tapes the initialization of | |
434 | * sc->sc_nxrec by tmphys causes them to be skipped normally | |
435 | * (except in the case of retries). | |
436 | */ | |
437 | if (dbtofsb(bp->b_blkno) > sc->sc_nxrec) { | |
438 | /* | |
439 | * Can't read past known end-of-file. | |
440 | */ | |
441 | bp->b_flags |= B_ERROR; | |
442 | bp->b_error = ENXIO; | |
443 | goto next; | |
444 | } | |
445 | if (dbtofsb(bp->b_blkno) == sc->sc_nxrec && | |
446 | bp->b_flags&B_READ) { | |
447 | /* | |
448 | * Reading at end of file returns 0 bytes. | |
449 | */ | |
450 | bp->b_resid = bp->b_bcount; | |
451 | clrbuf(bp); | |
452 | goto next; | |
453 | } | |
454 | if ((bp->b_flags&B_READ) == 0) | |
455 | /* | |
456 | * Writing sets EOF | |
457 | */ | |
458 | sc->sc_nxrec = dbtofsb(bp->b_blkno) + 1; | |
71236e46 BJ |
459 | /* |
460 | * If the data transfer command is in the correct place, | |
461 | * set up all the registers except the csr, and give | |
462 | * control over to the UNIBUS adapter routines, to | |
463 | * wait for resources to start the i/o. | |
464 | */ | |
7e00c42b | 465 | if ((blkno = sc->sc_blkno) == dbtofsb(bp->b_blkno)) { |
3f3a34c3 | 466 | addr->tmbc = -bp->b_bcount; |
d75e5c3e | 467 | if ((bp->b_flags&B_READ) == 0) { |
7e00c42b | 468 | if (um->um_tab.b_errcnt) |
d565635a | 469 | cmd = TM_WIRG; |
d75e5c3e | 470 | else |
d565635a | 471 | cmd = TM_WCOM; |
d75e5c3e | 472 | } else |
d565635a | 473 | cmd = TM_RCOM; |
7e00c42b | 474 | um->um_tab.b_active = SIO; |
d565635a | 475 | um->um_cmd = sc->sc_dens|cmd; |
80905075 | 476 | #ifdef notdef |
d1330646 | 477 | if (tmreverseop(sc->sc_lastcmd)) |
d565635a | 478 | while (addr->tmer & TMER_SDWN) |
d1330646 | 479 | tmgapsdcnt++; |
d1330646 | 480 | sc->sc_lastcmd = TM_RCOM; /* will serve */ |
80905075 | 481 | #endif |
a752fee0 | 482 | sc->sc_timo = 60; /* premature, but should serve */ |
a0eab615 | 483 | (void) ubago(ui); |
d75e5c3e BJ |
484 | return; |
485 | } | |
71236e46 | 486 | /* |
d565635a BJ |
487 | * Tape positioned incorrectly; |
488 | * set to seek forwards or backwards to the correct spot. | |
489 | * This happens for raw tapes only on error retries. | |
71236e46 | 490 | */ |
7e00c42b | 491 | um->um_tab.b_active = SSEEK; |
d75e5c3e | 492 | if (blkno < dbtofsb(bp->b_blkno)) { |
d1330646 | 493 | bp->b_command = TM_SFORW; |
3f3a34c3 | 494 | addr->tmbc = blkno - dbtofsb(bp->b_blkno); |
d75e5c3e | 495 | } else { |
d1330646 | 496 | bp->b_command = TM_SREV; |
3f3a34c3 | 497 | addr->tmbc = dbtofsb(bp->b_blkno) - blkno; |
d75e5c3e | 498 | } |
c27ba986 | 499 | sc->sc_timo = imin(imax(10 * -addr->tmbc, 60), 5 * 60); |
d1330646 | 500 | dobpcmd: |
80905075 | 501 | #ifdef notdef |
d565635a BJ |
502 | /* |
503 | * It is strictly necessary to wait for the tape | |
504 | * to stop before changing directions, but the TC11 | |
505 | * handles this for us. | |
506 | */ | |
d1330646 BJ |
507 | if (tmreverseop(sc->sc_lastcmd) != tmreverseop(bp->b_command)) |
508 | while (addr->tmer & TM_SDWN) | |
509 | tmgapsdcnt++; | |
d1330646 | 510 | sc->sc_lastcmd = bp->b_command; |
80905075 | 511 | #endif |
d565635a BJ |
512 | /* |
513 | * Do the command in bp. | |
514 | */ | |
515 | addr->tmcs = (sc->sc_dens | bp->b_command); | |
d75e5c3e BJ |
516 | return; |
517 | ||
518 | next: | |
71236e46 BJ |
519 | /* |
520 | * Done with this operation due to error or | |
521 | * the fact that it doesn't do anything. | |
522 | * Release UBA resources (if any), dequeue | |
523 | * the transfer and continue processing this slave. | |
524 | */ | |
525 | if (um->um_ubinfo) | |
0801d37f | 526 | ubadone(um); |
71236e46 BJ |
527 | um->um_tab.b_errcnt = 0; |
528 | dp->b_actf = bp->av_forw; | |
d75e5c3e BJ |
529 | iodone(bp); |
530 | goto loop; | |
531 | } | |
532 | ||
71236e46 BJ |
533 | /* |
534 | * The UNIBUS resources we needed have been | |
535 | * allocated to us; start the device. | |
536 | */ | |
e4271c68 | 537 | tmdgo(um) |
89bd2f01 | 538 | register struct uba_ctlr *um; |
3f3a34c3 | 539 | { |
e4271c68 | 540 | register struct device *addr = (struct device *)um->um_addr; |
7e00c42b | 541 | |
e4271c68 BJ |
542 | addr->tmba = um->um_ubinfo; |
543 | addr->tmcs = um->um_cmd | ((um->um_ubinfo >> 12) & 0x30); | |
3f3a34c3 BJ |
544 | } |
545 | ||
71236e46 BJ |
546 | /* |
547 | * Tm interrupt routine. | |
548 | */ | |
7e00c42b | 549 | /*ARGSUSED*/ |
afb907f2 BJ |
550 | tmintr(tm11) |
551 | int tm11; | |
d75e5c3e | 552 | { |
71236e46 | 553 | struct buf *dp; |
d75e5c3e | 554 | register struct buf *bp; |
89bd2f01 | 555 | register struct uba_ctlr *um = tmminfo[tm11]; |
d565635a BJ |
556 | register struct device *addr; |
557 | register struct te_softc *sc; | |
558 | int teunit; | |
d75e5c3e BJ |
559 | register state; |
560 | ||
d565635a BJ |
561 | if ((dp = um->um_tab.b_actf) == NULL) |
562 | return; | |
563 | bp = dp->b_actf; | |
564 | teunit = TEUNIT(bp->b_dev); | |
565 | addr = (struct device *)tedinfo[teunit]->ui_addr; | |
6a476a42 | 566 | sc = &te_softc[teunit]; |
71236e46 BJ |
567 | /* |
568 | * If last command was a rewind, and tape is still | |
569 | * rewinding, wait for the rewind complete interrupt. | |
570 | */ | |
571 | if (um->um_tab.b_active == SREW) { | |
572 | um->um_tab.b_active = SCOM; | |
6a476a42 BJ |
573 | if (addr->tmer&TMER_RWS) { |
574 | sc->sc_timo = 5*60; /* 5 minutes */ | |
71236e46 | 575 | return; |
6a476a42 | 576 | } |
d75e5c3e | 577 | } |
71236e46 BJ |
578 | /* |
579 | * An operation completed... record status | |
580 | */ | |
a752fee0 | 581 | sc->sc_timo = INF; |
7e00c42b BJ |
582 | sc->sc_dsreg = addr->tmcs; |
583 | sc->sc_erreg = addr->tmer; | |
584 | sc->sc_resid = addr->tmbc; | |
d75e5c3e | 585 | if ((bp->b_flags & B_READ) == 0) |
71236e46 | 586 | sc->sc_lastiow = 1; |
7e00c42b BJ |
587 | state = um->um_tab.b_active; |
588 | um->um_tab.b_active = 0; | |
71236e46 BJ |
589 | /* |
590 | * Check for errors. | |
591 | */ | |
592 | if (addr->tmcs&TM_ERR) { | |
d565635a | 593 | while (addr->tmer & TMER_SDWN) |
d75e5c3e | 594 | ; /* await settle down */ |
71236e46 | 595 | /* |
d565635a | 596 | * If we hit the end of the tape file, update our position. |
71236e46 | 597 | */ |
d565635a | 598 | if (addr->tmer&TMER_EOF) { |
71236e46 BJ |
599 | tmseteof(bp); /* set blkno and nxrec */ |
600 | state = SCOM; /* force completion */ | |
601 | /* | |
602 | * Stuff bc so it will be unstuffed correctly | |
603 | * later to get resid. | |
604 | */ | |
3f3a34c3 | 605 | addr->tmbc = -bp->b_bcount; |
71236e46 | 606 | goto opdone; |
d75e5c3e | 607 | } |
71236e46 | 608 | /* |
d565635a BJ |
609 | * If we were reading raw tape and the only error was that the |
610 | * record was too long, then we don't consider this an error. | |
71236e46 | 611 | */ |
d565635a BJ |
612 | if (bp == &rtmbuf[TMUNIT(bp->b_dev)] && (bp->b_flags&B_READ) && |
613 | (addr->tmer&(TMER_HARD|TMER_SOFT)) == TMER_RLE) | |
71236e46 BJ |
614 | goto ignoreerr; |
615 | /* | |
616 | * If error is not hard, and this was an i/o operation | |
617 | * retry up to 8 times. | |
618 | */ | |
d565635a | 619 | if ((addr->tmer&TMER_HARD)==0 && state==SIO) { |
7e00c42b | 620 | if (++um->um_tab.b_errcnt < 7) { |
7e00c42b | 621 | sc->sc_blkno++; |
0801d37f | 622 | ubadone(um); |
71236e46 | 623 | goto opcont; |
d75e5c3e | 624 | } |
71236e46 BJ |
625 | } else |
626 | /* | |
627 | * Hard or non-i/o errors on non-raw tape | |
628 | * cause it to close. | |
629 | */ | |
d565635a | 630 | if (sc->sc_openf>0 && bp != &rtmbuf[TMUNIT(bp->b_dev)]) |
71236e46 BJ |
631 | sc->sc_openf = -1; |
632 | /* | |
633 | * Couldn't recover error | |
634 | */ | |
80905075 | 635 | printf("te%d: hard error bn%d er=%b\n", minor(bp->b_dev)&03, |
d565635a | 636 | bp->b_blkno, sc->sc_erreg, TMER_BITS); |
d75e5c3e | 637 | bp->b_flags |= B_ERROR; |
71236e46 | 638 | goto opdone; |
d75e5c3e | 639 | } |
71236e46 BJ |
640 | /* |
641 | * Advance tape control FSM. | |
642 | */ | |
643 | ignoreerr: | |
d75e5c3e BJ |
644 | switch (state) { |
645 | ||
646 | case SIO: | |
71236e46 BJ |
647 | /* |
648 | * Read/write increments tape block number | |
649 | */ | |
7e00c42b | 650 | sc->sc_blkno++; |
71236e46 | 651 | goto opdone; |
d75e5c3e BJ |
652 | |
653 | case SCOM: | |
71236e46 | 654 | /* |
d565635a | 655 | * For forward/backward space record update current position. |
71236e46 | 656 | */ |
d565635a | 657 | if (bp == &ctmbuf[TMUNIT(bp->b_dev)]) |
71236e46 BJ |
658 | switch (bp->b_command) { |
659 | ||
660 | case TM_SFORW: | |
661 | sc->sc_blkno -= bp->b_repcnt; | |
d565635a | 662 | break; |
71236e46 BJ |
663 | |
664 | case TM_SREV: | |
665 | sc->sc_blkno += bp->b_repcnt; | |
d565635a | 666 | break; |
d75e5c3e | 667 | } |
d565635a | 668 | goto opdone; |
d75e5c3e BJ |
669 | |
670 | case SSEEK: | |
7e00c42b | 671 | sc->sc_blkno = dbtofsb(bp->b_blkno); |
71236e46 | 672 | goto opcont; |
d75e5c3e BJ |
673 | |
674 | default: | |
71236e46 | 675 | panic("tmintr"); |
d75e5c3e | 676 | } |
71236e46 BJ |
677 | opdone: |
678 | /* | |
679 | * Reset error count and remove | |
680 | * from device queue. | |
681 | */ | |
682 | um->um_tab.b_errcnt = 0; | |
683 | dp->b_actf = bp->av_forw; | |
684 | bp->b_resid = -addr->tmbc; | |
0801d37f | 685 | ubadone(um); |
71236e46 BJ |
686 | iodone(bp); |
687 | /* | |
688 | * Circulate slave to end of controller | |
689 | * queue to give other slaves a chance. | |
690 | */ | |
691 | um->um_tab.b_actf = dp->b_forw; | |
692 | if (dp->b_actf) { | |
693 | dp->b_forw = NULL; | |
694 | if (um->um_tab.b_actf == NULL) | |
695 | um->um_tab.b_actf = dp; | |
696 | else | |
697 | um->um_tab.b_actl->b_forw = dp; | |
698 | um->um_tab.b_actl = dp; | |
699 | } | |
700 | if (um->um_tab.b_actf == 0) | |
701 | return; | |
702 | opcont: | |
703 | tmstart(um); | |
d75e5c3e BJ |
704 | } |
705 | ||
a752fee0 BJ |
706 | tmtimer(dev) |
707 | int dev; | |
708 | { | |
709 | register struct te_softc *sc = &te_softc[TEUNIT(dev)]; | |
710 | ||
711 | if (sc->sc_timo != INF && (sc->sc_timo -= 5) < 0) { | |
712 | printf("te%d: lost interrupt\n"); | |
713 | sc->sc_timo = INF; | |
714 | (void) spl5(); | |
715 | tmintr(TMUNIT(dev)); | |
716 | (void) spl0(); | |
717 | } | |
c27ba986 | 718 | timeout(tmtimer, (caddr_t)dev, 5*hz); |
a752fee0 BJ |
719 | } |
720 | ||
d75e5c3e BJ |
721 | tmseteof(bp) |
722 | register struct buf *bp; | |
723 | { | |
d565635a | 724 | register int teunit = TEUNIT(bp->b_dev); |
3f3a34c3 | 725 | register struct device *addr = |
d565635a BJ |
726 | (struct device *)tedinfo[teunit]->ui_addr; |
727 | register struct te_softc *sc = &te_softc[teunit]; | |
d75e5c3e | 728 | |
d565635a | 729 | if (bp == &ctmbuf[TMUNIT(bp->b_dev)]) { |
7e00c42b | 730 | if (sc->sc_blkno > dbtofsb(bp->b_blkno)) { |
d75e5c3e | 731 | /* reversing */ |
7e00c42b BJ |
732 | sc->sc_nxrec = dbtofsb(bp->b_blkno) - addr->tmbc; |
733 | sc->sc_blkno = sc->sc_nxrec; | |
d75e5c3e BJ |
734 | } else { |
735 | /* spacing forward */ | |
7e00c42b BJ |
736 | sc->sc_blkno = dbtofsb(bp->b_blkno) + addr->tmbc; |
737 | sc->sc_nxrec = sc->sc_blkno - 1; | |
d75e5c3e BJ |
738 | } |
739 | return; | |
740 | } | |
741 | /* eof on read */ | |
7e00c42b | 742 | sc->sc_nxrec = dbtofsb(bp->b_blkno); |
d75e5c3e BJ |
743 | } |
744 | ||
745 | tmread(dev) | |
71236e46 | 746 | dev_t dev; |
d75e5c3e BJ |
747 | { |
748 | ||
749 | tmphys(dev); | |
89bd2f01 BJ |
750 | if (u.u_error) |
751 | return; | |
71236e46 | 752 | physio(tmstrategy, &rtmbuf[TMUNIT(dev)], dev, B_READ, minphys); |
d75e5c3e BJ |
753 | } |
754 | ||
755 | tmwrite(dev) | |
71236e46 | 756 | dev_t dev; |
d75e5c3e BJ |
757 | { |
758 | ||
759 | tmphys(dev); | |
89bd2f01 BJ |
760 | if (u.u_error) |
761 | return; | |
71236e46 | 762 | physio(tmstrategy, &rtmbuf[TMUNIT(dev)], dev, B_WRITE, minphys); |
d75e5c3e BJ |
763 | } |
764 | ||
d565635a BJ |
765 | /* |
766 | * Check that a raw device exists. | |
767 | * If it does, set up sc_blkno and sc_nxrec | |
768 | * so that the tape will appear positioned correctly. | |
769 | */ | |
d75e5c3e | 770 | tmphys(dev) |
71236e46 | 771 | dev_t dev; |
d75e5c3e | 772 | { |
d565635a | 773 | register int teunit = TEUNIT(dev); |
d75e5c3e | 774 | register daddr_t a; |
d565635a BJ |
775 | register struct te_softc *sc; |
776 | register struct uba_device *ui; | |
d75e5c3e | 777 | |
d565635a | 778 | if (teunit >= NTE || (ui=tedinfo[teunit]) == 0 || ui->ui_alive == 0) { |
89bd2f01 BJ |
779 | u.u_error = ENXIO; |
780 | return; | |
781 | } | |
d565635a | 782 | sc = &te_softc[teunit]; |
d75e5c3e | 783 | a = dbtofsb(u.u_offset >> 9); |
7e00c42b BJ |
784 | sc->sc_blkno = a; |
785 | sc->sc_nxrec = a + 1; | |
d75e5c3e BJ |
786 | } |
787 | ||
71236e46 BJ |
788 | tmreset(uban) |
789 | int uban; | |
790 | { | |
89bd2f01 | 791 | register struct uba_ctlr *um; |
d565635a | 792 | register tm11, teunit; |
89bd2f01 | 793 | register struct uba_device *ui; |
71236e46 BJ |
794 | register struct buf *dp; |
795 | ||
afb907f2 BJ |
796 | for (tm11 = 0; tm11 < NTM; tm11++) { |
797 | if ((um = tmminfo[tm11]) == 0 || um->um_alive == 0 || | |
71236e46 BJ |
798 | um->um_ubanum != uban) |
799 | continue; | |
80905075 | 800 | printf(" tm%d", tm11); |
71236e46 BJ |
801 | um->um_tab.b_active = 0; |
802 | um->um_tab.b_actf = um->um_tab.b_actl = 0; | |
803 | if (um->um_ubinfo) { | |
804 | printf("<%d>", (um->um_ubinfo>>28)&0xf); | |
0801d37f | 805 | ubadone(um); |
71236e46 BJ |
806 | } |
807 | ((struct device *)(um->um_addr))->tmcs = TM_DCLR; | |
d565635a BJ |
808 | for (teunit = 0; teunit < NTE; teunit++) { |
809 | if ((ui = tedinfo[teunit]) == 0 || ui->ui_mi != um || | |
810 | ui->ui_alive == 0) | |
71236e46 | 811 | continue; |
d565635a | 812 | dp = &teutab[teunit]; |
71236e46 BJ |
813 | dp->b_active = 0; |
814 | dp->b_forw = 0; | |
815 | if (um->um_tab.b_actf == NULL) | |
816 | um->um_tab.b_actf = dp; | |
817 | else | |
818 | um->um_tab.b_actl->b_forw = dp; | |
819 | um->um_tab.b_actl = dp; | |
a752fee0 BJ |
820 | if (te_softc[teunit].sc_openf > 0) |
821 | te_softc[teunit].sc_openf = -1; | |
71236e46 BJ |
822 | } |
823 | tmstart(um); | |
824 | } | |
825 | } | |
826 | ||
d75e5c3e BJ |
827 | /*ARGSUSED*/ |
828 | tmioctl(dev, cmd, addr, flag) | |
829 | caddr_t addr; | |
830 | dev_t dev; | |
831 | { | |
d565635a BJ |
832 | int teunit = TEUNIT(dev); |
833 | register struct te_softc *sc = &te_softc[teunit]; | |
834 | register struct buf *bp = &ctmbuf[TMUNIT(dev)]; | |
d75e5c3e BJ |
835 | register callcount; |
836 | int fcount; | |
837 | struct mtop mtop; | |
838 | struct mtget mtget; | |
839 | /* we depend of the values and order of the MT codes here */ | |
71236e46 BJ |
840 | static tmops[] = |
841 | {TM_WEOF,TM_SFORW,TM_SREV,TM_SFORW,TM_SREV,TM_REW,TM_OFFL,TM_SENSE}; | |
d75e5c3e | 842 | |
71236e46 | 843 | switch (cmd) { |
d75e5c3e BJ |
844 | case MTIOCTOP: /* tape operation */ |
845 | if (copyin((caddr_t)addr, (caddr_t)&mtop, sizeof(mtop))) { | |
846 | u.u_error = EFAULT; | |
847 | return; | |
848 | } | |
849 | switch(mtop.mt_op) { | |
71236e46 BJ |
850 | case MTWEOF: |
851 | callcount = mtop.mt_count; | |
852 | fcount = 1; | |
853 | break; | |
854 | case MTFSF: case MTBSF: | |
d75e5c3e BJ |
855 | callcount = mtop.mt_count; |
856 | fcount = INF; | |
857 | break; | |
858 | case MTFSR: case MTBSR: | |
859 | callcount = 1; | |
860 | fcount = mtop.mt_count; | |
861 | break; | |
77115c00 | 862 | case MTREW: case MTOFFL: case MTNOP: |
d75e5c3e BJ |
863 | callcount = 1; |
864 | fcount = 1; | |
865 | break; | |
866 | default: | |
867 | u.u_error = ENXIO; | |
868 | return; | |
869 | } | |
71236e46 | 870 | if (callcount <= 0 || fcount <= 0) { |
d75e5c3e | 871 | u.u_error = ENXIO; |
71236e46 BJ |
872 | return; |
873 | } | |
874 | while (--callcount >= 0) { | |
e4271c68 | 875 | tmcommand(dev, tmops[mtop.mt_op], fcount); |
d75e5c3e | 876 | if ((mtop.mt_op == MTFSR || mtop.mt_op == MTBSR) && |
71236e46 | 877 | bp->b_resid) { |
d75e5c3e BJ |
878 | u.u_error = EIO; |
879 | break; | |
880 | } | |
d565635a | 881 | if ((bp->b_flags&B_ERROR) || sc->sc_erreg&TMER_BOT) |
d75e5c3e BJ |
882 | break; |
883 | } | |
71236e46 | 884 | geterror(bp); |
d75e5c3e BJ |
885 | return; |
886 | case MTIOCGET: | |
7e00c42b BJ |
887 | mtget.mt_dsreg = sc->sc_dsreg; |
888 | mtget.mt_erreg = sc->sc_erreg; | |
889 | mtget.mt_resid = sc->sc_resid; | |
65e74b33 | 890 | mtget.mt_type = MT_ISTM; |
d75e5c3e BJ |
891 | if (copyout((caddr_t)&mtget, addr, sizeof(mtget))) |
892 | u.u_error = EFAULT; | |
893 | return; | |
894 | default: | |
895 | u.u_error = ENXIO; | |
896 | } | |
897 | } | |
898 | ||
899 | #define DBSIZE 20 | |
900 | ||
7455bf3e | 901 | tmdump() |
d75e5c3e | 902 | { |
89bd2f01 | 903 | register struct uba_device *ui; |
3f3a34c3 BJ |
904 | register struct uba_regs *up; |
905 | register struct device *addr; | |
5aa9d5ea RE |
906 | int blk, num; |
907 | int start; | |
d75e5c3e | 908 | |
5aa9d5ea RE |
909 | start = 0; |
910 | num = maxfree; | |
911 | #define phys(a,b) ((b)((int)(a)&0x7fffffff)) | |
d565635a | 912 | if (tedinfo[0] == 0) |
2536c16c | 913 | return (ENXIO); |
d565635a | 914 | ui = phys(tedinfo[0], struct uba_device *); |
3f3a34c3 | 915 | up = phys(ui->ui_hd, struct uba_hd *)->uh_physuba; |
57229699 | 916 | ubainit(up); |
77115c00 | 917 | DELAY(1000000); |
3f3a34c3 BJ |
918 | addr = (struct device *)ui->ui_physaddr; |
919 | tmwait(addr); | |
71236e46 | 920 | addr->tmcs = TM_DCLR | TM_GO; |
d75e5c3e BJ |
921 | while (num > 0) { |
922 | blk = num > DBSIZE ? DBSIZE : num; | |
3f3a34c3 | 923 | tmdwrite(start, blk, addr, up); |
d75e5c3e BJ |
924 | start += blk; |
925 | num -= blk; | |
926 | } | |
5aa9d5ea RE |
927 | tmeof(addr); |
928 | tmeof(addr); | |
7e00c42b | 929 | tmwait(addr); |
2536c16c BJ |
930 | if (addr->tmcs&TM_ERR) |
931 | return (EIO); | |
71236e46 | 932 | addr->tmcs = TM_REW | TM_GO; |
5aa9d5ea | 933 | tmwait(addr); |
7455bf3e | 934 | return (0); |
d75e5c3e BJ |
935 | } |
936 | ||
71236e46 BJ |
937 | tmdwrite(dbuf, num, addr, up) |
938 | register dbuf, num; | |
3f3a34c3 BJ |
939 | register struct device *addr; |
940 | struct uba_regs *up; | |
d75e5c3e | 941 | { |
3f3a34c3 BJ |
942 | register struct pte *io; |
943 | register int npf; | |
0a51498e | 944 | |
3f3a34c3 | 945 | tmwait(addr); |
3f3a34c3 | 946 | io = up->uba_map; |
d75e5c3e | 947 | npf = num+1; |
0a51498e | 948 | while (--npf != 0) |
89bd2f01 | 949 | *(int *)io++ = (dbuf++ | (1<<UBAMR_DPSHIFT) | UBAMR_MRV); |
3f3a34c3 BJ |
950 | *(int *)io = 0; |
951 | addr->tmbc = -(num*NBPG); | |
952 | addr->tmba = 0; | |
71236e46 | 953 | addr->tmcs = TM_WCOM | TM_GO; |
d75e5c3e BJ |
954 | } |
955 | ||
3f3a34c3 BJ |
956 | tmwait(addr) |
957 | register struct device *addr; | |
d75e5c3e | 958 | { |
0a51498e | 959 | register s; |
d75e5c3e BJ |
960 | |
961 | do | |
3f3a34c3 | 962 | s = addr->tmcs; |
71236e46 | 963 | while ((s & TM_CUR) == 0); |
d75e5c3e BJ |
964 | } |
965 | ||
3f3a34c3 BJ |
966 | tmeof(addr) |
967 | struct device *addr; | |
d75e5c3e BJ |
968 | { |
969 | ||
3f3a34c3 | 970 | tmwait(addr); |
71236e46 | 971 | addr->tmcs = TM_WEOF | TM_GO; |
d75e5c3e BJ |
972 | } |
973 | #endif |