Commit | Line | Data |
---|---|---|
a752fee0 | 1 | /* tm.c 4.34 81/04/09 */ |
d75e5c3e | 2 | |
443c8066 | 3 | #include "te.h" |
afb907f2 | 4 | #if NTM > 0 |
d75e5c3e | 5 | /* |
afb907f2 | 6 | * TM11/TE10 tape driver |
7e00c42b | 7 | * |
d565635a BJ |
8 | * TODO: |
9 | * test driver with more than one slave | |
10 | * test driver with more than one controller | |
11 | * test reset code | |
d565635a BJ |
12 | * what happens if you offline tape during rewind? |
13 | * test using file system on tape | |
d75e5c3e | 14 | */ |
d75e5c3e | 15 | #include "../h/param.h" |
27a897a2 | 16 | #include "../h/systm.h" |
d75e5c3e BJ |
17 | #include "../h/buf.h" |
18 | #include "../h/dir.h" | |
19 | #include "../h/conf.h" | |
20 | #include "../h/user.h" | |
21 | #include "../h/file.h" | |
22 | #include "../h/map.h" | |
23 | #include "../h/pte.h" | |
e4271c68 | 24 | #include "../h/vm.h" |
89bd2f01 BJ |
25 | #include "../h/ubareg.h" |
26 | #include "../h/ubavar.h" | |
d75e5c3e BJ |
27 | #include "../h/mtio.h" |
28 | #include "../h/ioctl.h" | |
7455bf3e | 29 | #include "../h/cmap.h" |
3f3a34c3 | 30 | #include "../h/cpu.h" |
d75e5c3e | 31 | |
3f3a34c3 | 32 | #include "../h/tmreg.h" |
d75e5c3e | 33 | |
d565635a BJ |
34 | /* |
35 | * There is a ctmbuf per tape controller. | |
36 | * It is used as the token to pass to the internal routines | |
37 | * to execute tape ioctls, and also acts as a lock on the slaves | |
38 | * on the controller, since there is only one per controller. | |
39 | * In particular, when the tape is rewinding on close we release | |
40 | * the user process but any further attempts to use the tape drive | |
41 | * before the rewind completes will hang waiting for ctmbuf. | |
42 | */ | |
43 | struct buf ctmbuf[NTM]; | |
44 | ||
45 | /* | |
46 | * Raw tape operations use rtmbuf. The driver | |
47 | * notices when rtmbuf is being used and allows the user | |
48 | * program to continue after errors and read records | |
49 | * not of the standard length (BSIZE). | |
50 | */ | |
51 | struct buf rtmbuf[NTM]; | |
d75e5c3e | 52 | |
d565635a BJ |
53 | /* |
54 | * Driver unibus interface routines and variables. | |
55 | */ | |
71236e46 | 56 | int tmprobe(), tmslave(), tmattach(), tmdgo(), tmintr(); |
89bd2f01 | 57 | struct uba_ctlr *tmminfo[NTM]; |
d565635a BJ |
58 | struct uba_device *tedinfo[NTE]; |
59 | struct buf teutab[NTE]; | |
60 | short tetotm[NTE]; | |
d763a2b7 | 61 | u_short tmstd[] = { 0772520, 0 }; |
3f3a34c3 | 62 | struct uba_driver tmdriver = |
d565635a | 63 | { tmprobe, tmslave, tmattach, tmdgo, tmstd, "te", tedinfo, "tm", tmminfo, 0 }; |
d75e5c3e BJ |
64 | |
65 | /* bits in minor device */ | |
d565635a BJ |
66 | #define TEUNIT(dev) (minor(dev)&03) |
67 | #define TMUNIT(dev) (tetotm[TEUNIT(dev)]) | |
d75e5c3e BJ |
68 | #define T_NOREWIND 04 |
69 | #define T_1600BPI 08 | |
70 | ||
71 | #define INF (daddr_t)1000000L | |
72 | ||
71236e46 BJ |
73 | /* |
74 | * Software state per tape transport. | |
d565635a BJ |
75 | * |
76 | * 1. A tape drive is a unique-open device; we refuse opens when it is already. | |
77 | * 2. We keep track of the current position on a block tape and seek | |
78 | * before operations by forward/back spacing if necessary. | |
79 | * 3. We remember if the last operation was a write on a tape, so if a tape | |
80 | * is open read write and the last thing done is a write we can | |
81 | * write a standard end of tape mark (two eofs). | |
82 | * 4. We remember the status registers after the last command, using | |
83 | * then internally and returning them to the SENSE ioctl. | |
84 | * 5. We remember the last density the tape was used at. If it is | |
85 | * not a BOT when we start using it and we are writing, we don't | |
86 | * let the density be changed. | |
71236e46 | 87 | */ |
d565635a | 88 | struct te_softc { |
71236e46 BJ |
89 | char sc_openf; /* lock against multiple opens */ |
90 | char sc_lastiow; /* last op was a write */ | |
91 | daddr_t sc_blkno; /* block number, for block device tape */ | |
d565635a | 92 | daddr_t sc_nxrec; /* position of end of tape, if known */ |
71236e46 BJ |
93 | u_short sc_erreg; /* copy of last erreg */ |
94 | u_short sc_dsreg; /* copy of last dsreg */ | |
95 | short sc_resid; /* copy of last bc */ | |
a0eab615 | 96 | #ifdef unneeded |
d1330646 | 97 | short sc_lastcmd; /* last command to handle direction changes */ |
80905075 | 98 | #endif |
d565635a | 99 | u_short sc_dens; /* prototype command with density info */ |
a752fee0 BJ |
100 | daddr_t sc_timo; /* time until timeout expires */ |
101 | short sc_tact; /* timeout is active */ | |
d565635a | 102 | } te_softc[NTM]; |
a0eab615 BJ |
103 | #ifdef unneeded |
104 | int tmgapsdcnt; /* DEBUG */ | |
105 | #endif | |
d75e5c3e | 106 | |
71236e46 | 107 | /* |
d565635a BJ |
108 | * States for um->um_tab.b_active, the per controller state flag. |
109 | * This is used to sequence control in the driver. | |
71236e46 | 110 | */ |
d75e5c3e BJ |
111 | #define SSEEK 1 /* seeking */ |
112 | #define SIO 2 /* doing seq i/o */ | |
113 | #define SCOM 3 /* sending control command */ | |
71236e46 | 114 | #define SREW 4 /* sending a drive rewind */ |
d75e5c3e | 115 | |
5aa9d5ea RE |
116 | /* |
117 | * Determine if there is a controller for | |
118 | * a tm at address reg. Our goal is to make the | |
119 | * device interrupt. | |
5aa9d5ea | 120 | */ |
71236e46 | 121 | tmprobe(reg) |
3f3a34c3 BJ |
122 | caddr_t reg; |
123 | { | |
d565635a | 124 | register int br, cvec; /* must be r11,r10; value-result */ |
5aa9d5ea | 125 | |
71236e46 | 126 | #ifdef lint |
a0eab615 | 127 | br = 0; cvec = br; br = cvec; |
71236e46 BJ |
128 | #endif |
129 | ((struct device *)reg)->tmcs = TM_IE; | |
3f3a34c3 | 130 | /* |
afb907f2 | 131 | * If this is a tm11, it ought to have interrupted |
3f3a34c3 | 132 | * by now, if it isn't (ie: it is a ts04) then we just |
d763a2b7 BJ |
133 | * hope that it didn't interrupt, so autoconf will ignore it. |
134 | * Just in case, we will reference one | |
3f3a34c3 | 135 | * of the more distant registers, and hope for a machine |
d763a2b7 | 136 | * check, or similar disaster if this is a ts. |
7e00c42b BJ |
137 | * |
138 | * Note: on an 11/780, badaddr will just generate | |
139 | * a uba error for a ts; but our caller will notice that | |
140 | * so we won't check for it. | |
3f3a34c3 | 141 | */ |
a0eab615 | 142 | if (badaddr((caddr_t)&((struct device *)reg)->tmrd, 2)) |
d763a2b7 BJ |
143 | return (0); |
144 | return (1); | |
3f3a34c3 BJ |
145 | } |
146 | ||
71236e46 BJ |
147 | /* |
148 | * Due to a design flaw, we cannot ascertain if the tape | |
149 | * exists or not unless it is on line - ie: unless a tape is | |
150 | * mounted. This is too servere a restriction to bear, | |
151 | * so all units are assumed to exist. | |
152 | */ | |
153 | /*ARGSUSED*/ | |
e4271c68 | 154 | tmslave(ui, reg) |
89bd2f01 | 155 | struct uba_device *ui; |
3f3a34c3 BJ |
156 | caddr_t reg; |
157 | { | |
d763a2b7 | 158 | |
d763a2b7 | 159 | return (1); |
3f3a34c3 BJ |
160 | } |
161 | ||
71236e46 | 162 | /* |
d565635a | 163 | * Record attachment of the unit to the controller. |
71236e46 BJ |
164 | */ |
165 | /*ARGSUSED*/ | |
166 | tmattach(ui) | |
89bd2f01 | 167 | struct uba_device *ui; |
71236e46 BJ |
168 | { |
169 | ||
d565635a BJ |
170 | /* |
171 | * Tetotm is used in TMUNIT to index the ctmbuf and rtmbuf | |
172 | * arrays given a te unit number. | |
173 | */ | |
174 | tetotm[ui->ui_unit] = ui->ui_mi->um_ctlr; | |
71236e46 BJ |
175 | } |
176 | ||
a752fee0 | 177 | int tmtimer(); |
71236e46 BJ |
178 | /* |
179 | * Open the device. Tapes are unique open | |
180 | * devices, so we refuse if it is already open. | |
181 | * We also check that a tape is available, and | |
d565635a BJ |
182 | * don't block waiting here; if you want to wait |
183 | * for a tape you should timeout in user code. | |
71236e46 | 184 | */ |
d75e5c3e BJ |
185 | tmopen(dev, flag) |
186 | dev_t dev; | |
187 | int flag; | |
188 | { | |
d565635a | 189 | register int teunit; |
89bd2f01 | 190 | register struct uba_device *ui; |
d565635a | 191 | register struct te_softc *sc; |
971424d9 | 192 | int olddens, dens; |
d75e5c3e | 193 | |
d565635a BJ |
194 | teunit = TEUNIT(dev); |
195 | if (teunit>=NTE || (sc = &te_softc[teunit])->sc_openf || | |
196 | (ui = tedinfo[teunit]) == 0 || ui->ui_alive == 0) { | |
71236e46 | 197 | u.u_error = ENXIO; |
d75e5c3e BJ |
198 | return; |
199 | } | |
971424d9 BJ |
200 | olddens = sc->sc_dens; |
201 | dens = TM_IE | TM_GO | (ui->ui_slave << 8); | |
202 | if ((minor(dev) & T_1600BPI) == 0) | |
203 | dens |= TM_D800; | |
204 | sc->sc_dens = dens; | |
27a897a2 | 205 | get: |
71236e46 | 206 | tmcommand(dev, TM_SENSE, 1); |
27a897a2 BJ |
207 | if (sc->sc_erreg&TMER_SDWN) { |
208 | sleep((caddr_t)&lbolt, PZERO+1); | |
209 | goto get; | |
210 | } | |
971424d9 | 211 | sc->sc_dens = olddens; |
d565635a | 212 | if ((sc->sc_erreg&(TMER_SELR|TMER_TUR)) != (TMER_SELR|TMER_TUR) || |
4fd4cf52 | 213 | (flag&FWRITE) && (sc->sc_erreg&TMER_WRL) || |
d565635a | 214 | (sc->sc_erreg&TMER_BOT) == 0 && (flag&FWRITE) && |
4fd4cf52 | 215 | dens != sc->sc_dens) { |
d565635a BJ |
216 | /* |
217 | * Not online or density switch in mid-tape or write locked. | |
218 | */ | |
71236e46 | 219 | u.u_error = EIO; |
d75e5c3e BJ |
220 | return; |
221 | } | |
71236e46 | 222 | sc->sc_openf = 1; |
7e00c42b BJ |
223 | sc->sc_blkno = (daddr_t)0; |
224 | sc->sc_nxrec = INF; | |
71236e46 | 225 | sc->sc_lastiow = 0; |
d565635a | 226 | sc->sc_dens = dens; |
a752fee0 BJ |
227 | (void) spl6(); |
228 | if (sc->sc_tact == 0) { | |
229 | sc->sc_timo = INF; | |
230 | sc->sc_tact = 1; | |
231 | timeout(tmtimer, dev, 5*hz); | |
232 | } | |
233 | (void) spl0(); | |
d75e5c3e BJ |
234 | } |
235 | ||
71236e46 BJ |
236 | /* |
237 | * Close tape device. | |
238 | * | |
239 | * If tape was open for writing or last operation was | |
240 | * a write, then write two EOF's and backspace over the last one. | |
241 | * Unless this is a non-rewinding special file, rewind the tape. | |
242 | * Make the tape available to others. | |
243 | */ | |
d75e5c3e BJ |
244 | tmclose(dev, flag) |
245 | register dev_t dev; | |
246 | register flag; | |
247 | { | |
d565635a | 248 | register struct te_softc *sc = &te_softc[TEUNIT(dev)]; |
d75e5c3e | 249 | |
71236e46 BJ |
250 | if (flag == FWRITE || (flag&FWRITE) && sc->sc_lastiow) { |
251 | tmcommand(dev, TM_WEOF, 1); | |
252 | tmcommand(dev, TM_WEOF, 1); | |
253 | tmcommand(dev, TM_SREV, 1); | |
d75e5c3e BJ |
254 | } |
255 | if ((minor(dev)&T_NOREWIND) == 0) | |
d565635a BJ |
256 | /* |
257 | * 0 count means don't hang waiting for rewind complete | |
258 | * rather ctmbuf stays busy until the operation completes | |
259 | * preventing further opens from completing by | |
260 | * preventing a TM_SENSE from completing. | |
261 | */ | |
262 | tmcommand(dev, TM_REW, 0); | |
7e00c42b | 263 | sc->sc_openf = 0; |
d75e5c3e BJ |
264 | } |
265 | ||
71236e46 BJ |
266 | /* |
267 | * Execute a command on the tape drive | |
268 | * a specified number of times. | |
269 | */ | |
e4271c68 | 270 | tmcommand(dev, com, count) |
d75e5c3e BJ |
271 | dev_t dev; |
272 | int com, count; | |
273 | { | |
274 | register struct buf *bp; | |
275 | ||
71236e46 | 276 | bp = &ctmbuf[TMUNIT(dev)]; |
d75e5c3e BJ |
277 | (void) spl5(); |
278 | while (bp->b_flags&B_BUSY) { | |
d565635a BJ |
279 | /* |
280 | * This special check is because B_BUSY never | |
281 | * gets cleared in the non-waiting rewind case. | |
282 | */ | |
27a897a2 | 283 | if (bp->b_repcnt == 0 && (bp->b_flags&B_DONE)) |
d565635a | 284 | break; |
d75e5c3e BJ |
285 | bp->b_flags |= B_WANTED; |
286 | sleep((caddr_t)bp, PRIBIO); | |
287 | } | |
288 | bp->b_flags = B_BUSY|B_READ; | |
289 | (void) spl0(); | |
290 | bp->b_dev = dev; | |
291 | bp->b_repcnt = -count; | |
292 | bp->b_command = com; | |
293 | bp->b_blkno = 0; | |
294 | tmstrategy(bp); | |
d565635a BJ |
295 | /* |
296 | * In case of rewind from close, don't wait. | |
297 | * This is the only case where count can be 0. | |
298 | */ | |
299 | if (count == 0) | |
300 | return; | |
d75e5c3e BJ |
301 | iowait(bp); |
302 | if (bp->b_flags&B_WANTED) | |
303 | wakeup((caddr_t)bp); | |
304 | bp->b_flags &= B_ERROR; | |
305 | } | |
306 | ||
71236e46 | 307 | /* |
d565635a | 308 | * Queue a tape operation. |
71236e46 | 309 | */ |
d75e5c3e BJ |
310 | tmstrategy(bp) |
311 | register struct buf *bp; | |
312 | { | |
d565635a | 313 | int teunit = TEUNIT(bp->b_dev); |
89bd2f01 | 314 | register struct uba_ctlr *um; |
71236e46 | 315 | register struct buf *dp; |
d75e5c3e | 316 | |
71236e46 BJ |
317 | /* |
318 | * Put transfer at end of unit queue | |
319 | */ | |
d565635a | 320 | dp = &teutab[teunit]; |
d75e5c3e BJ |
321 | bp->av_forw = NULL; |
322 | (void) spl5(); | |
71236e46 BJ |
323 | if (dp->b_actf == NULL) { |
324 | dp->b_actf = bp; | |
325 | /* | |
326 | * Transport not already active... | |
327 | * put at end of controller queue. | |
328 | */ | |
329 | dp->b_forw = NULL; | |
d565635a | 330 | um = tedinfo[teunit]->ui_mi; |
71236e46 BJ |
331 | if (um->um_tab.b_actf == NULL) |
332 | um->um_tab.b_actf = dp; | |
333 | else | |
334 | um->um_tab.b_actl->b_forw = dp; | |
335 | um->um_tab.b_actl = dp; | |
336 | } else | |
337 | dp->b_actl->av_forw = bp; | |
338 | dp->b_actl = bp; | |
339 | /* | |
340 | * If the controller is not busy, get | |
341 | * it going. | |
342 | */ | |
343 | if (um->um_tab.b_active == 0) | |
344 | tmstart(um); | |
d75e5c3e BJ |
345 | (void) spl0(); |
346 | } | |
347 | ||
71236e46 BJ |
348 | /* |
349 | * Start activity on a tm controller. | |
350 | */ | |
351 | tmstart(um) | |
89bd2f01 | 352 | register struct uba_ctlr *um; |
d75e5c3e | 353 | { |
71236e46 BJ |
354 | register struct buf *bp, *dp; |
355 | register struct device *addr = (struct device *)um->um_addr; | |
d565635a | 356 | register struct te_softc *sc; |
89bd2f01 | 357 | register struct uba_device *ui; |
d565635a | 358 | int teunit, cmd; |
7e00c42b | 359 | daddr_t blkno; |
d75e5c3e | 360 | |
71236e46 BJ |
361 | /* |
362 | * Look for an idle transport on the controller. | |
363 | */ | |
d75e5c3e | 364 | loop: |
71236e46 | 365 | if ((dp = um->um_tab.b_actf) == NULL) |
d75e5c3e | 366 | return; |
71236e46 BJ |
367 | if ((bp = dp->b_actf) == NULL) { |
368 | um->um_tab.b_actf = dp->b_forw; | |
369 | goto loop; | |
370 | } | |
d565635a BJ |
371 | teunit = TEUNIT(bp->b_dev); |
372 | ui = tedinfo[teunit]; | |
71236e46 BJ |
373 | /* |
374 | * Record pre-transfer status (e.g. for TM_SENSE) | |
375 | */ | |
d565635a | 376 | sc = &te_softc[teunit]; |
71236e46 BJ |
377 | addr = (struct device *)um->um_addr; |
378 | addr->tmcs = (ui->ui_slave << 8); | |
7e00c42b BJ |
379 | sc->sc_dsreg = addr->tmcs; |
380 | sc->sc_erreg = addr->tmer; | |
381 | sc->sc_resid = addr->tmbc; | |
71236e46 BJ |
382 | /* |
383 | * Default is that last command was NOT a write command; | |
384 | * if we do a write command we will notice this in tmintr(). | |
385 | */ | |
bc9da2ca | 386 | sc->sc_lastiow = 0; |
71236e46 BJ |
387 | if (sc->sc_openf < 0 || (addr->tmcs&TM_CUR) == 0) { |
388 | /* | |
d565635a BJ |
389 | * Have had a hard error on a non-raw tape |
390 | * or the tape unit is now unavailable | |
391 | * (e.g. taken off line). | |
71236e46 BJ |
392 | */ |
393 | bp->b_flags |= B_ERROR; | |
d75e5c3e BJ |
394 | goto next; |
395 | } | |
d565635a BJ |
396 | if (bp == &ctmbuf[TMUNIT(bp->b_dev)]) { |
397 | /* | |
398 | * Execute control operation with the specified count. | |
399 | */ | |
71236e46 BJ |
400 | if (bp->b_command == TM_SENSE) |
401 | goto next; | |
a752fee0 BJ |
402 | /* |
403 | * Set next state; give 5 minutes to complete | |
404 | * rewind, or 10 seconds per iteration (minimum 60 | |
405 | * seconds and max 5 minute) to complete other ops. | |
406 | */ | |
407 | if (bp->b_command == TM_REW) { | |
408 | um->um_tab.b_active = SREW; | |
409 | sc->sc_timo = 5 * 60; | |
410 | } else { | |
411 | um->um_tab.b_active = SCOM; | |
412 | sc->sc_timo = min(max(10 * bp->b_repcnt, 60), 5 * 60); | |
413 | } | |
71236e46 BJ |
414 | if (bp->b_command == TM_SFORW || bp->b_command == TM_SREV) |
415 | addr->tmbc = bp->b_repcnt; | |
d1330646 | 416 | goto dobpcmd; |
71236e46 | 417 | } |
d565635a BJ |
418 | /* |
419 | * The following checks handle boundary cases for operation | |
420 | * on non-raw tapes. On raw tapes the initialization of | |
421 | * sc->sc_nxrec by tmphys causes them to be skipped normally | |
422 | * (except in the case of retries). | |
423 | */ | |
424 | if (dbtofsb(bp->b_blkno) > sc->sc_nxrec) { | |
425 | /* | |
426 | * Can't read past known end-of-file. | |
427 | */ | |
428 | bp->b_flags |= B_ERROR; | |
429 | bp->b_error = ENXIO; | |
430 | goto next; | |
431 | } | |
432 | if (dbtofsb(bp->b_blkno) == sc->sc_nxrec && | |
433 | bp->b_flags&B_READ) { | |
434 | /* | |
435 | * Reading at end of file returns 0 bytes. | |
436 | */ | |
437 | bp->b_resid = bp->b_bcount; | |
438 | clrbuf(bp); | |
439 | goto next; | |
440 | } | |
441 | if ((bp->b_flags&B_READ) == 0) | |
442 | /* | |
443 | * Writing sets EOF | |
444 | */ | |
445 | sc->sc_nxrec = dbtofsb(bp->b_blkno) + 1; | |
71236e46 BJ |
446 | /* |
447 | * If the data transfer command is in the correct place, | |
448 | * set up all the registers except the csr, and give | |
449 | * control over to the UNIBUS adapter routines, to | |
450 | * wait for resources to start the i/o. | |
451 | */ | |
7e00c42b | 452 | if ((blkno = sc->sc_blkno) == dbtofsb(bp->b_blkno)) { |
3f3a34c3 | 453 | addr->tmbc = -bp->b_bcount; |
d75e5c3e | 454 | if ((bp->b_flags&B_READ) == 0) { |
7e00c42b | 455 | if (um->um_tab.b_errcnt) |
d565635a | 456 | cmd = TM_WIRG; |
d75e5c3e | 457 | else |
d565635a | 458 | cmd = TM_WCOM; |
d75e5c3e | 459 | } else |
d565635a | 460 | cmd = TM_RCOM; |
7e00c42b | 461 | um->um_tab.b_active = SIO; |
d565635a | 462 | um->um_cmd = sc->sc_dens|cmd; |
80905075 | 463 | #ifdef notdef |
d1330646 | 464 | if (tmreverseop(sc->sc_lastcmd)) |
d565635a | 465 | while (addr->tmer & TMER_SDWN) |
d1330646 | 466 | tmgapsdcnt++; |
d1330646 | 467 | sc->sc_lastcmd = TM_RCOM; /* will serve */ |
80905075 | 468 | #endif |
a752fee0 | 469 | sc->sc_timo = 60; /* premature, but should serve */ |
a0eab615 | 470 | (void) ubago(ui); |
d75e5c3e BJ |
471 | return; |
472 | } | |
71236e46 | 473 | /* |
d565635a BJ |
474 | * Tape positioned incorrectly; |
475 | * set to seek forwards or backwards to the correct spot. | |
476 | * This happens for raw tapes only on error retries. | |
71236e46 | 477 | */ |
7e00c42b | 478 | um->um_tab.b_active = SSEEK; |
d75e5c3e | 479 | if (blkno < dbtofsb(bp->b_blkno)) { |
d1330646 | 480 | bp->b_command = TM_SFORW; |
3f3a34c3 | 481 | addr->tmbc = blkno - dbtofsb(bp->b_blkno); |
d75e5c3e | 482 | } else { |
d1330646 | 483 | bp->b_command = TM_SREV; |
3f3a34c3 | 484 | addr->tmbc = dbtofsb(bp->b_blkno) - blkno; |
d75e5c3e | 485 | } |
a752fee0 | 486 | sc->sc_timo = min(max(10 * -addr->tmbc, 60), 5 * 60); |
d1330646 | 487 | dobpcmd: |
80905075 | 488 | #ifdef notdef |
d565635a BJ |
489 | /* |
490 | * It is strictly necessary to wait for the tape | |
491 | * to stop before changing directions, but the TC11 | |
492 | * handles this for us. | |
493 | */ | |
d1330646 BJ |
494 | if (tmreverseop(sc->sc_lastcmd) != tmreverseop(bp->b_command)) |
495 | while (addr->tmer & TM_SDWN) | |
496 | tmgapsdcnt++; | |
d1330646 | 497 | sc->sc_lastcmd = bp->b_command; |
80905075 | 498 | #endif |
d565635a BJ |
499 | /* |
500 | * Do the command in bp. | |
501 | */ | |
502 | addr->tmcs = (sc->sc_dens | bp->b_command); | |
d75e5c3e BJ |
503 | return; |
504 | ||
505 | next: | |
71236e46 BJ |
506 | /* |
507 | * Done with this operation due to error or | |
508 | * the fact that it doesn't do anything. | |
509 | * Release UBA resources (if any), dequeue | |
510 | * the transfer and continue processing this slave. | |
511 | */ | |
512 | if (um->um_ubinfo) | |
0801d37f | 513 | ubadone(um); |
71236e46 BJ |
514 | um->um_tab.b_errcnt = 0; |
515 | dp->b_actf = bp->av_forw; | |
d75e5c3e BJ |
516 | iodone(bp); |
517 | goto loop; | |
518 | } | |
519 | ||
71236e46 BJ |
520 | /* |
521 | * The UNIBUS resources we needed have been | |
522 | * allocated to us; start the device. | |
523 | */ | |
e4271c68 | 524 | tmdgo(um) |
89bd2f01 | 525 | register struct uba_ctlr *um; |
3f3a34c3 | 526 | { |
e4271c68 | 527 | register struct device *addr = (struct device *)um->um_addr; |
7e00c42b | 528 | |
e4271c68 BJ |
529 | addr->tmba = um->um_ubinfo; |
530 | addr->tmcs = um->um_cmd | ((um->um_ubinfo >> 12) & 0x30); | |
3f3a34c3 BJ |
531 | } |
532 | ||
71236e46 BJ |
533 | /* |
534 | * Tm interrupt routine. | |
535 | */ | |
7e00c42b | 536 | /*ARGSUSED*/ |
afb907f2 BJ |
537 | tmintr(tm11) |
538 | int tm11; | |
d75e5c3e | 539 | { |
71236e46 | 540 | struct buf *dp; |
d75e5c3e | 541 | register struct buf *bp; |
89bd2f01 | 542 | register struct uba_ctlr *um = tmminfo[tm11]; |
d565635a BJ |
543 | register struct device *addr; |
544 | register struct te_softc *sc; | |
545 | int teunit; | |
d75e5c3e BJ |
546 | register state; |
547 | ||
d565635a BJ |
548 | if ((dp = um->um_tab.b_actf) == NULL) |
549 | return; | |
550 | bp = dp->b_actf; | |
551 | teunit = TEUNIT(bp->b_dev); | |
552 | addr = (struct device *)tedinfo[teunit]->ui_addr; | |
71236e46 BJ |
553 | /* |
554 | * If last command was a rewind, and tape is still | |
555 | * rewinding, wait for the rewind complete interrupt. | |
556 | */ | |
557 | if (um->um_tab.b_active == SREW) { | |
558 | um->um_tab.b_active = SCOM; | |
d565635a | 559 | if (addr->tmer&TMER_RWS) |
71236e46 | 560 | return; |
d75e5c3e | 561 | } |
71236e46 BJ |
562 | /* |
563 | * An operation completed... record status | |
564 | */ | |
d565635a | 565 | sc = &te_softc[teunit]; |
a752fee0 | 566 | sc->sc_timo = INF; |
7e00c42b BJ |
567 | sc->sc_dsreg = addr->tmcs; |
568 | sc->sc_erreg = addr->tmer; | |
569 | sc->sc_resid = addr->tmbc; | |
d75e5c3e | 570 | if ((bp->b_flags & B_READ) == 0) |
71236e46 | 571 | sc->sc_lastiow = 1; |
7e00c42b BJ |
572 | state = um->um_tab.b_active; |
573 | um->um_tab.b_active = 0; | |
71236e46 BJ |
574 | /* |
575 | * Check for errors. | |
576 | */ | |
577 | if (addr->tmcs&TM_ERR) { | |
d565635a | 578 | while (addr->tmer & TMER_SDWN) |
d75e5c3e | 579 | ; /* await settle down */ |
71236e46 | 580 | /* |
d565635a | 581 | * If we hit the end of the tape file, update our position. |
71236e46 | 582 | */ |
d565635a | 583 | if (addr->tmer&TMER_EOF) { |
71236e46 BJ |
584 | tmseteof(bp); /* set blkno and nxrec */ |
585 | state = SCOM; /* force completion */ | |
586 | /* | |
587 | * Stuff bc so it will be unstuffed correctly | |
588 | * later to get resid. | |
589 | */ | |
3f3a34c3 | 590 | addr->tmbc = -bp->b_bcount; |
71236e46 | 591 | goto opdone; |
d75e5c3e | 592 | } |
71236e46 | 593 | /* |
d565635a BJ |
594 | * If we were reading raw tape and the only error was that the |
595 | * record was too long, then we don't consider this an error. | |
71236e46 | 596 | */ |
d565635a BJ |
597 | if (bp == &rtmbuf[TMUNIT(bp->b_dev)] && (bp->b_flags&B_READ) && |
598 | (addr->tmer&(TMER_HARD|TMER_SOFT)) == TMER_RLE) | |
71236e46 BJ |
599 | goto ignoreerr; |
600 | /* | |
601 | * If error is not hard, and this was an i/o operation | |
602 | * retry up to 8 times. | |
603 | */ | |
d565635a | 604 | if ((addr->tmer&TMER_HARD)==0 && state==SIO) { |
7e00c42b | 605 | if (++um->um_tab.b_errcnt < 7) { |
7e00c42b | 606 | sc->sc_blkno++; |
0801d37f | 607 | ubadone(um); |
71236e46 | 608 | goto opcont; |
d75e5c3e | 609 | } |
71236e46 BJ |
610 | } else |
611 | /* | |
612 | * Hard or non-i/o errors on non-raw tape | |
613 | * cause it to close. | |
614 | */ | |
d565635a | 615 | if (sc->sc_openf>0 && bp != &rtmbuf[TMUNIT(bp->b_dev)]) |
71236e46 BJ |
616 | sc->sc_openf = -1; |
617 | /* | |
618 | * Couldn't recover error | |
619 | */ | |
80905075 | 620 | printf("te%d: hard error bn%d er=%b\n", minor(bp->b_dev)&03, |
d565635a | 621 | bp->b_blkno, sc->sc_erreg, TMER_BITS); |
d75e5c3e | 622 | bp->b_flags |= B_ERROR; |
71236e46 | 623 | goto opdone; |
d75e5c3e | 624 | } |
71236e46 BJ |
625 | /* |
626 | * Advance tape control FSM. | |
627 | */ | |
628 | ignoreerr: | |
d75e5c3e BJ |
629 | switch (state) { |
630 | ||
631 | case SIO: | |
71236e46 BJ |
632 | /* |
633 | * Read/write increments tape block number | |
634 | */ | |
7e00c42b | 635 | sc->sc_blkno++; |
71236e46 | 636 | goto opdone; |
d75e5c3e BJ |
637 | |
638 | case SCOM: | |
71236e46 | 639 | /* |
d565635a | 640 | * For forward/backward space record update current position. |
71236e46 | 641 | */ |
d565635a | 642 | if (bp == &ctmbuf[TMUNIT(bp->b_dev)]) |
71236e46 BJ |
643 | switch (bp->b_command) { |
644 | ||
645 | case TM_SFORW: | |
646 | sc->sc_blkno -= bp->b_repcnt; | |
d565635a | 647 | break; |
71236e46 BJ |
648 | |
649 | case TM_SREV: | |
650 | sc->sc_blkno += bp->b_repcnt; | |
d565635a | 651 | break; |
d75e5c3e | 652 | } |
d565635a | 653 | goto opdone; |
d75e5c3e BJ |
654 | |
655 | case SSEEK: | |
7e00c42b | 656 | sc->sc_blkno = dbtofsb(bp->b_blkno); |
71236e46 | 657 | goto opcont; |
d75e5c3e BJ |
658 | |
659 | default: | |
71236e46 | 660 | panic("tmintr"); |
d75e5c3e | 661 | } |
71236e46 BJ |
662 | opdone: |
663 | /* | |
664 | * Reset error count and remove | |
665 | * from device queue. | |
666 | */ | |
667 | um->um_tab.b_errcnt = 0; | |
668 | dp->b_actf = bp->av_forw; | |
669 | bp->b_resid = -addr->tmbc; | |
0801d37f | 670 | ubadone(um); |
71236e46 BJ |
671 | iodone(bp); |
672 | /* | |
673 | * Circulate slave to end of controller | |
674 | * queue to give other slaves a chance. | |
675 | */ | |
676 | um->um_tab.b_actf = dp->b_forw; | |
677 | if (dp->b_actf) { | |
678 | dp->b_forw = NULL; | |
679 | if (um->um_tab.b_actf == NULL) | |
680 | um->um_tab.b_actf = dp; | |
681 | else | |
682 | um->um_tab.b_actl->b_forw = dp; | |
683 | um->um_tab.b_actl = dp; | |
684 | } | |
685 | if (um->um_tab.b_actf == 0) | |
686 | return; | |
687 | opcont: | |
688 | tmstart(um); | |
d75e5c3e BJ |
689 | } |
690 | ||
a752fee0 BJ |
691 | tmtimer(dev) |
692 | int dev; | |
693 | { | |
694 | register struct te_softc *sc = &te_softc[TEUNIT(dev)]; | |
695 | ||
696 | if (sc->sc_timo != INF && (sc->sc_timo -= 5) < 0) { | |
697 | printf("te%d: lost interrupt\n"); | |
698 | sc->sc_timo = INF; | |
699 | (void) spl5(); | |
700 | tmintr(TMUNIT(dev)); | |
701 | (void) spl0(); | |
702 | } | |
703 | timeout(tmtimer, dev, 5*hz); | |
704 | } | |
705 | ||
d75e5c3e BJ |
706 | tmseteof(bp) |
707 | register struct buf *bp; | |
708 | { | |
d565635a | 709 | register int teunit = TEUNIT(bp->b_dev); |
3f3a34c3 | 710 | register struct device *addr = |
d565635a BJ |
711 | (struct device *)tedinfo[teunit]->ui_addr; |
712 | register struct te_softc *sc = &te_softc[teunit]; | |
d75e5c3e | 713 | |
d565635a | 714 | if (bp == &ctmbuf[TMUNIT(bp->b_dev)]) { |
7e00c42b | 715 | if (sc->sc_blkno > dbtofsb(bp->b_blkno)) { |
d75e5c3e | 716 | /* reversing */ |
7e00c42b BJ |
717 | sc->sc_nxrec = dbtofsb(bp->b_blkno) - addr->tmbc; |
718 | sc->sc_blkno = sc->sc_nxrec; | |
d75e5c3e BJ |
719 | } else { |
720 | /* spacing forward */ | |
7e00c42b BJ |
721 | sc->sc_blkno = dbtofsb(bp->b_blkno) + addr->tmbc; |
722 | sc->sc_nxrec = sc->sc_blkno - 1; | |
d75e5c3e BJ |
723 | } |
724 | return; | |
725 | } | |
726 | /* eof on read */ | |
7e00c42b | 727 | sc->sc_nxrec = dbtofsb(bp->b_blkno); |
d75e5c3e BJ |
728 | } |
729 | ||
730 | tmread(dev) | |
71236e46 | 731 | dev_t dev; |
d75e5c3e BJ |
732 | { |
733 | ||
734 | tmphys(dev); | |
89bd2f01 BJ |
735 | if (u.u_error) |
736 | return; | |
71236e46 | 737 | physio(tmstrategy, &rtmbuf[TMUNIT(dev)], dev, B_READ, minphys); |
d75e5c3e BJ |
738 | } |
739 | ||
740 | tmwrite(dev) | |
71236e46 | 741 | dev_t dev; |
d75e5c3e BJ |
742 | { |
743 | ||
744 | tmphys(dev); | |
89bd2f01 BJ |
745 | if (u.u_error) |
746 | return; | |
71236e46 | 747 | physio(tmstrategy, &rtmbuf[TMUNIT(dev)], dev, B_WRITE, minphys); |
d75e5c3e BJ |
748 | } |
749 | ||
d565635a BJ |
750 | /* |
751 | * Check that a raw device exists. | |
752 | * If it does, set up sc_blkno and sc_nxrec | |
753 | * so that the tape will appear positioned correctly. | |
754 | */ | |
d75e5c3e | 755 | tmphys(dev) |
71236e46 | 756 | dev_t dev; |
d75e5c3e | 757 | { |
d565635a | 758 | register int teunit = TEUNIT(dev); |
d75e5c3e | 759 | register daddr_t a; |
d565635a BJ |
760 | register struct te_softc *sc; |
761 | register struct uba_device *ui; | |
d75e5c3e | 762 | |
d565635a | 763 | if (teunit >= NTE || (ui=tedinfo[teunit]) == 0 || ui->ui_alive == 0) { |
89bd2f01 BJ |
764 | u.u_error = ENXIO; |
765 | return; | |
766 | } | |
d565635a | 767 | sc = &te_softc[teunit]; |
d75e5c3e | 768 | a = dbtofsb(u.u_offset >> 9); |
7e00c42b BJ |
769 | sc->sc_blkno = a; |
770 | sc->sc_nxrec = a + 1; | |
d75e5c3e BJ |
771 | } |
772 | ||
71236e46 BJ |
773 | tmreset(uban) |
774 | int uban; | |
775 | { | |
89bd2f01 | 776 | register struct uba_ctlr *um; |
d565635a | 777 | register tm11, teunit; |
89bd2f01 | 778 | register struct uba_device *ui; |
71236e46 BJ |
779 | register struct buf *dp; |
780 | ||
afb907f2 BJ |
781 | for (tm11 = 0; tm11 < NTM; tm11++) { |
782 | if ((um = tmminfo[tm11]) == 0 || um->um_alive == 0 || | |
71236e46 BJ |
783 | um->um_ubanum != uban) |
784 | continue; | |
80905075 | 785 | printf(" tm%d", tm11); |
71236e46 BJ |
786 | um->um_tab.b_active = 0; |
787 | um->um_tab.b_actf = um->um_tab.b_actl = 0; | |
788 | if (um->um_ubinfo) { | |
789 | printf("<%d>", (um->um_ubinfo>>28)&0xf); | |
0801d37f | 790 | ubadone(um); |
71236e46 BJ |
791 | } |
792 | ((struct device *)(um->um_addr))->tmcs = TM_DCLR; | |
d565635a BJ |
793 | for (teunit = 0; teunit < NTE; teunit++) { |
794 | if ((ui = tedinfo[teunit]) == 0 || ui->ui_mi != um || | |
795 | ui->ui_alive == 0) | |
71236e46 | 796 | continue; |
d565635a | 797 | dp = &teutab[teunit]; |
71236e46 BJ |
798 | dp->b_active = 0; |
799 | dp->b_forw = 0; | |
800 | if (um->um_tab.b_actf == NULL) | |
801 | um->um_tab.b_actf = dp; | |
802 | else | |
803 | um->um_tab.b_actl->b_forw = dp; | |
804 | um->um_tab.b_actl = dp; | |
a752fee0 BJ |
805 | if (te_softc[teunit].sc_openf > 0) |
806 | te_softc[teunit].sc_openf = -1; | |
71236e46 BJ |
807 | } |
808 | tmstart(um); | |
809 | } | |
810 | } | |
811 | ||
d75e5c3e BJ |
812 | /*ARGSUSED*/ |
813 | tmioctl(dev, cmd, addr, flag) | |
814 | caddr_t addr; | |
815 | dev_t dev; | |
816 | { | |
d565635a BJ |
817 | int teunit = TEUNIT(dev); |
818 | register struct te_softc *sc = &te_softc[teunit]; | |
819 | register struct buf *bp = &ctmbuf[TMUNIT(dev)]; | |
d75e5c3e BJ |
820 | register callcount; |
821 | int fcount; | |
822 | struct mtop mtop; | |
823 | struct mtget mtget; | |
824 | /* we depend of the values and order of the MT codes here */ | |
71236e46 BJ |
825 | static tmops[] = |
826 | {TM_WEOF,TM_SFORW,TM_SREV,TM_SFORW,TM_SREV,TM_REW,TM_OFFL,TM_SENSE}; | |
d75e5c3e | 827 | |
71236e46 | 828 | switch (cmd) { |
d75e5c3e BJ |
829 | case MTIOCTOP: /* tape operation */ |
830 | if (copyin((caddr_t)addr, (caddr_t)&mtop, sizeof(mtop))) { | |
831 | u.u_error = EFAULT; | |
832 | return; | |
833 | } | |
834 | switch(mtop.mt_op) { | |
71236e46 BJ |
835 | case MTWEOF: |
836 | callcount = mtop.mt_count; | |
837 | fcount = 1; | |
838 | break; | |
839 | case MTFSF: case MTBSF: | |
d75e5c3e BJ |
840 | callcount = mtop.mt_count; |
841 | fcount = INF; | |
842 | break; | |
843 | case MTFSR: case MTBSR: | |
844 | callcount = 1; | |
845 | fcount = mtop.mt_count; | |
846 | break; | |
77115c00 | 847 | case MTREW: case MTOFFL: case MTNOP: |
d75e5c3e BJ |
848 | callcount = 1; |
849 | fcount = 1; | |
850 | break; | |
851 | default: | |
852 | u.u_error = ENXIO; | |
853 | return; | |
854 | } | |
71236e46 | 855 | if (callcount <= 0 || fcount <= 0) { |
d75e5c3e | 856 | u.u_error = ENXIO; |
71236e46 BJ |
857 | return; |
858 | } | |
859 | while (--callcount >= 0) { | |
e4271c68 | 860 | tmcommand(dev, tmops[mtop.mt_op], fcount); |
d75e5c3e | 861 | if ((mtop.mt_op == MTFSR || mtop.mt_op == MTBSR) && |
71236e46 | 862 | bp->b_resid) { |
d75e5c3e BJ |
863 | u.u_error = EIO; |
864 | break; | |
865 | } | |
d565635a | 866 | if ((bp->b_flags&B_ERROR) || sc->sc_erreg&TMER_BOT) |
d75e5c3e BJ |
867 | break; |
868 | } | |
71236e46 | 869 | geterror(bp); |
d75e5c3e BJ |
870 | return; |
871 | case MTIOCGET: | |
7e00c42b BJ |
872 | mtget.mt_dsreg = sc->sc_dsreg; |
873 | mtget.mt_erreg = sc->sc_erreg; | |
874 | mtget.mt_resid = sc->sc_resid; | |
65e74b33 | 875 | mtget.mt_type = MT_ISTM; |
d75e5c3e BJ |
876 | if (copyout((caddr_t)&mtget, addr, sizeof(mtget))) |
877 | u.u_error = EFAULT; | |
878 | return; | |
879 | default: | |
880 | u.u_error = ENXIO; | |
881 | } | |
882 | } | |
883 | ||
884 | #define DBSIZE 20 | |
885 | ||
7455bf3e | 886 | tmdump() |
d75e5c3e | 887 | { |
89bd2f01 | 888 | register struct uba_device *ui; |
3f3a34c3 BJ |
889 | register struct uba_regs *up; |
890 | register struct device *addr; | |
5aa9d5ea RE |
891 | int blk, num; |
892 | int start; | |
d75e5c3e | 893 | |
5aa9d5ea RE |
894 | start = 0; |
895 | num = maxfree; | |
896 | #define phys(a,b) ((b)((int)(a)&0x7fffffff)) | |
d565635a | 897 | if (tedinfo[0] == 0) |
2536c16c | 898 | return (ENXIO); |
d565635a | 899 | ui = phys(tedinfo[0], struct uba_device *); |
3f3a34c3 | 900 | up = phys(ui->ui_hd, struct uba_hd *)->uh_physuba; |
57229699 | 901 | ubainit(up); |
77115c00 | 902 | DELAY(1000000); |
3f3a34c3 BJ |
903 | addr = (struct device *)ui->ui_physaddr; |
904 | tmwait(addr); | |
71236e46 | 905 | addr->tmcs = TM_DCLR | TM_GO; |
d75e5c3e BJ |
906 | while (num > 0) { |
907 | blk = num > DBSIZE ? DBSIZE : num; | |
3f3a34c3 | 908 | tmdwrite(start, blk, addr, up); |
d75e5c3e BJ |
909 | start += blk; |
910 | num -= blk; | |
911 | } | |
5aa9d5ea RE |
912 | tmeof(addr); |
913 | tmeof(addr); | |
7e00c42b | 914 | tmwait(addr); |
2536c16c BJ |
915 | if (addr->tmcs&TM_ERR) |
916 | return (EIO); | |
71236e46 | 917 | addr->tmcs = TM_REW | TM_GO; |
5aa9d5ea | 918 | tmwait(addr); |
7455bf3e | 919 | return (0); |
d75e5c3e BJ |
920 | } |
921 | ||
71236e46 BJ |
922 | tmdwrite(dbuf, num, addr, up) |
923 | register dbuf, num; | |
3f3a34c3 BJ |
924 | register struct device *addr; |
925 | struct uba_regs *up; | |
d75e5c3e | 926 | { |
3f3a34c3 BJ |
927 | register struct pte *io; |
928 | register int npf; | |
0a51498e | 929 | |
3f3a34c3 | 930 | tmwait(addr); |
3f3a34c3 | 931 | io = up->uba_map; |
d75e5c3e | 932 | npf = num+1; |
0a51498e | 933 | while (--npf != 0) |
89bd2f01 | 934 | *(int *)io++ = (dbuf++ | (1<<UBAMR_DPSHIFT) | UBAMR_MRV); |
3f3a34c3 BJ |
935 | *(int *)io = 0; |
936 | addr->tmbc = -(num*NBPG); | |
937 | addr->tmba = 0; | |
71236e46 | 938 | addr->tmcs = TM_WCOM | TM_GO; |
d75e5c3e BJ |
939 | } |
940 | ||
3f3a34c3 BJ |
941 | tmwait(addr) |
942 | register struct device *addr; | |
d75e5c3e | 943 | { |
0a51498e | 944 | register s; |
d75e5c3e BJ |
945 | |
946 | do | |
3f3a34c3 | 947 | s = addr->tmcs; |
71236e46 | 948 | while ((s & TM_CUR) == 0); |
d75e5c3e BJ |
949 | } |
950 | ||
3f3a34c3 BJ |
951 | tmeof(addr) |
952 | struct device *addr; | |
d75e5c3e BJ |
953 | { |
954 | ||
3f3a34c3 | 955 | tmwait(addr); |
71236e46 | 956 | addr->tmcs = TM_WEOF | TM_GO; |
d75e5c3e BJ |
957 | } |
958 | #endif |