Commit | Line | Data |
---|---|---|
27a897a2 | 1 | /* tm.c 4.27 81/03/09 */ |
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 | |
12 | * test rewinds without hanging in driver | |
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 BJ |
100 | u_short sc_dens; /* prototype command with density info */ |
101 | } te_softc[NTM]; | |
a0eab615 BJ |
102 | #ifdef unneeded |
103 | int tmgapsdcnt; /* DEBUG */ | |
104 | #endif | |
d75e5c3e | 105 | |
71236e46 | 106 | /* |
d565635a BJ |
107 | * States for um->um_tab.b_active, the per controller state flag. |
108 | * This is used to sequence control in the driver. | |
71236e46 | 109 | */ |
d75e5c3e BJ |
110 | #define SSEEK 1 /* seeking */ |
111 | #define SIO 2 /* doing seq i/o */ | |
112 | #define SCOM 3 /* sending control command */ | |
71236e46 | 113 | #define SREW 4 /* sending a drive rewind */ |
d75e5c3e | 114 | |
5aa9d5ea RE |
115 | /* |
116 | * Determine if there is a controller for | |
117 | * a tm at address reg. Our goal is to make the | |
118 | * device interrupt. | |
5aa9d5ea | 119 | */ |
71236e46 | 120 | tmprobe(reg) |
3f3a34c3 BJ |
121 | caddr_t reg; |
122 | { | |
d565635a | 123 | register int br, cvec; /* must be r11,r10; value-result */ |
5aa9d5ea | 124 | |
71236e46 | 125 | #ifdef lint |
a0eab615 | 126 | br = 0; cvec = br; br = cvec; |
71236e46 BJ |
127 | #endif |
128 | ((struct device *)reg)->tmcs = TM_IE; | |
3f3a34c3 | 129 | /* |
afb907f2 | 130 | * If this is a tm11, it ought to have interrupted |
3f3a34c3 | 131 | * by now, if it isn't (ie: it is a ts04) then we just |
d763a2b7 BJ |
132 | * hope that it didn't interrupt, so autoconf will ignore it. |
133 | * Just in case, we will reference one | |
3f3a34c3 | 134 | * of the more distant registers, and hope for a machine |
d763a2b7 | 135 | * check, or similar disaster if this is a ts. |
7e00c42b BJ |
136 | * |
137 | * Note: on an 11/780, badaddr will just generate | |
138 | * a uba error for a ts; but our caller will notice that | |
139 | * so we won't check for it. | |
3f3a34c3 | 140 | */ |
a0eab615 | 141 | if (badaddr((caddr_t)&((struct device *)reg)->tmrd, 2)) |
d763a2b7 BJ |
142 | return (0); |
143 | return (1); | |
3f3a34c3 BJ |
144 | } |
145 | ||
71236e46 BJ |
146 | /* |
147 | * Due to a design flaw, we cannot ascertain if the tape | |
148 | * exists or not unless it is on line - ie: unless a tape is | |
149 | * mounted. This is too servere a restriction to bear, | |
150 | * so all units are assumed to exist. | |
151 | */ | |
152 | /*ARGSUSED*/ | |
e4271c68 | 153 | tmslave(ui, reg) |
89bd2f01 | 154 | struct uba_device *ui; |
3f3a34c3 BJ |
155 | caddr_t reg; |
156 | { | |
d763a2b7 | 157 | |
d763a2b7 | 158 | return (1); |
3f3a34c3 BJ |
159 | } |
160 | ||
71236e46 | 161 | /* |
d565635a | 162 | * Record attachment of the unit to the controller. |
71236e46 BJ |
163 | */ |
164 | /*ARGSUSED*/ | |
165 | tmattach(ui) | |
89bd2f01 | 166 | struct uba_device *ui; |
71236e46 BJ |
167 | { |
168 | ||
d565635a BJ |
169 | /* |
170 | * Tetotm is used in TMUNIT to index the ctmbuf and rtmbuf | |
171 | * arrays given a te unit number. | |
172 | */ | |
173 | tetotm[ui->ui_unit] = ui->ui_mi->um_ctlr; | |
71236e46 BJ |
174 | } |
175 | ||
176 | /* | |
177 | * Open the device. Tapes are unique open | |
178 | * devices, so we refuse if it is already open. | |
179 | * We also check that a tape is available, and | |
d565635a BJ |
180 | * don't block waiting here; if you want to wait |
181 | * for a tape you should timeout in user code. | |
71236e46 | 182 | */ |
d75e5c3e BJ |
183 | tmopen(dev, flag) |
184 | dev_t dev; | |
185 | int flag; | |
186 | { | |
d565635a | 187 | register int teunit; |
89bd2f01 | 188 | register struct uba_device *ui; |
d565635a BJ |
189 | register struct te_softc *sc; |
190 | int dens; | |
d75e5c3e | 191 | |
d565635a BJ |
192 | teunit = TEUNIT(dev); |
193 | if (teunit>=NTE || (sc = &te_softc[teunit])->sc_openf || | |
194 | (ui = tedinfo[teunit]) == 0 || ui->ui_alive == 0) { | |
71236e46 | 195 | u.u_error = ENXIO; |
d75e5c3e BJ |
196 | return; |
197 | } | |
27a897a2 | 198 | get: |
71236e46 | 199 | tmcommand(dev, TM_SENSE, 1); |
27a897a2 BJ |
200 | if (sc->sc_erreg&TMER_SDWN) { |
201 | sleep((caddr_t)&lbolt, PZERO+1); | |
202 | goto get; | |
203 | } | |
d565635a BJ |
204 | dens = TM_IE | TM_GO | (ui->ui_slave << 8); |
205 | if ((minor(dev) & T_1600BPI) == 0) | |
206 | dens |= TM_D800; | |
207 | if ((sc->sc_erreg&(TMER_SELR|TMER_TUR)) != (TMER_SELR|TMER_TUR) || | |
208 | (sc->sc_erreg&TMER_BOT) == 0 && (flag&FWRITE) && | |
209 | dens != sc->sc_dens || | |
210 | (flag&(FREAD|FWRITE)) == FWRITE && sc->sc_erreg&TMER_WRL) { | |
27a897a2 | 211 | printf("er %o dens %o sc->sc_dens %o flag %o\n", sc->sc_erreg, dens, sc->sc_dens, flag); |
d565635a BJ |
212 | /* |
213 | * Not online or density switch in mid-tape or write locked. | |
214 | */ | |
71236e46 | 215 | u.u_error = EIO; |
d75e5c3e BJ |
216 | return; |
217 | } | |
71236e46 | 218 | sc->sc_openf = 1; |
7e00c42b BJ |
219 | sc->sc_blkno = (daddr_t)0; |
220 | sc->sc_nxrec = INF; | |
71236e46 | 221 | sc->sc_lastiow = 0; |
d565635a | 222 | sc->sc_dens = dens; |
d75e5c3e BJ |
223 | } |
224 | ||
71236e46 BJ |
225 | /* |
226 | * Close tape device. | |
227 | * | |
228 | * If tape was open for writing or last operation was | |
229 | * a write, then write two EOF's and backspace over the last one. | |
230 | * Unless this is a non-rewinding special file, rewind the tape. | |
231 | * Make the tape available to others. | |
232 | */ | |
d75e5c3e BJ |
233 | tmclose(dev, flag) |
234 | register dev_t dev; | |
235 | register flag; | |
236 | { | |
d565635a | 237 | register struct te_softc *sc = &te_softc[TEUNIT(dev)]; |
d75e5c3e | 238 | |
71236e46 BJ |
239 | if (flag == FWRITE || (flag&FWRITE) && sc->sc_lastiow) { |
240 | tmcommand(dev, TM_WEOF, 1); | |
241 | tmcommand(dev, TM_WEOF, 1); | |
242 | tmcommand(dev, TM_SREV, 1); | |
d75e5c3e BJ |
243 | } |
244 | if ((minor(dev)&T_NOREWIND) == 0) | |
d565635a BJ |
245 | /* |
246 | * 0 count means don't hang waiting for rewind complete | |
247 | * rather ctmbuf stays busy until the operation completes | |
248 | * preventing further opens from completing by | |
249 | * preventing a TM_SENSE from completing. | |
250 | */ | |
251 | tmcommand(dev, TM_REW, 0); | |
7e00c42b | 252 | sc->sc_openf = 0; |
d75e5c3e BJ |
253 | } |
254 | ||
71236e46 BJ |
255 | /* |
256 | * Execute a command on the tape drive | |
257 | * a specified number of times. | |
258 | */ | |
e4271c68 | 259 | tmcommand(dev, com, count) |
d75e5c3e BJ |
260 | dev_t dev; |
261 | int com, count; | |
262 | { | |
263 | register struct buf *bp; | |
264 | ||
71236e46 | 265 | bp = &ctmbuf[TMUNIT(dev)]; |
d75e5c3e BJ |
266 | (void) spl5(); |
267 | while (bp->b_flags&B_BUSY) { | |
d565635a BJ |
268 | /* |
269 | * This special check is because B_BUSY never | |
270 | * gets cleared in the non-waiting rewind case. | |
271 | */ | |
27a897a2 | 272 | if (bp->b_repcnt == 0 && (bp->b_flags&B_DONE)) |
d565635a | 273 | break; |
d75e5c3e BJ |
274 | bp->b_flags |= B_WANTED; |
275 | sleep((caddr_t)bp, PRIBIO); | |
276 | } | |
277 | bp->b_flags = B_BUSY|B_READ; | |
278 | (void) spl0(); | |
279 | bp->b_dev = dev; | |
280 | bp->b_repcnt = -count; | |
281 | bp->b_command = com; | |
282 | bp->b_blkno = 0; | |
283 | tmstrategy(bp); | |
d565635a BJ |
284 | /* |
285 | * In case of rewind from close, don't wait. | |
286 | * This is the only case where count can be 0. | |
287 | */ | |
288 | if (count == 0) | |
289 | return; | |
d75e5c3e BJ |
290 | iowait(bp); |
291 | if (bp->b_flags&B_WANTED) | |
292 | wakeup((caddr_t)bp); | |
293 | bp->b_flags &= B_ERROR; | |
294 | } | |
295 | ||
71236e46 | 296 | /* |
d565635a | 297 | * Queue a tape operation. |
71236e46 | 298 | */ |
d75e5c3e BJ |
299 | tmstrategy(bp) |
300 | register struct buf *bp; | |
301 | { | |
d565635a | 302 | int teunit = TEUNIT(bp->b_dev); |
89bd2f01 | 303 | register struct uba_ctlr *um; |
71236e46 | 304 | register struct buf *dp; |
d75e5c3e | 305 | |
71236e46 BJ |
306 | /* |
307 | * Put transfer at end of unit queue | |
308 | */ | |
d565635a | 309 | dp = &teutab[teunit]; |
d75e5c3e BJ |
310 | bp->av_forw = NULL; |
311 | (void) spl5(); | |
71236e46 BJ |
312 | if (dp->b_actf == NULL) { |
313 | dp->b_actf = bp; | |
314 | /* | |
315 | * Transport not already active... | |
316 | * put at end of controller queue. | |
317 | */ | |
318 | dp->b_forw = NULL; | |
d565635a | 319 | um = tedinfo[teunit]->ui_mi; |
71236e46 BJ |
320 | if (um->um_tab.b_actf == NULL) |
321 | um->um_tab.b_actf = dp; | |
322 | else | |
323 | um->um_tab.b_actl->b_forw = dp; | |
324 | um->um_tab.b_actl = dp; | |
325 | } else | |
326 | dp->b_actl->av_forw = bp; | |
327 | dp->b_actl = bp; | |
328 | /* | |
329 | * If the controller is not busy, get | |
330 | * it going. | |
331 | */ | |
332 | if (um->um_tab.b_active == 0) | |
333 | tmstart(um); | |
d75e5c3e BJ |
334 | (void) spl0(); |
335 | } | |
336 | ||
71236e46 BJ |
337 | /* |
338 | * Start activity on a tm controller. | |
339 | */ | |
340 | tmstart(um) | |
89bd2f01 | 341 | register struct uba_ctlr *um; |
d75e5c3e | 342 | { |
71236e46 BJ |
343 | register struct buf *bp, *dp; |
344 | register struct device *addr = (struct device *)um->um_addr; | |
d565635a | 345 | register struct te_softc *sc; |
89bd2f01 | 346 | register struct uba_device *ui; |
d565635a | 347 | int teunit, cmd; |
7e00c42b | 348 | daddr_t blkno; |
d75e5c3e | 349 | |
71236e46 BJ |
350 | /* |
351 | * Look for an idle transport on the controller. | |
352 | */ | |
d75e5c3e | 353 | loop: |
71236e46 | 354 | if ((dp = um->um_tab.b_actf) == NULL) |
d75e5c3e | 355 | return; |
71236e46 BJ |
356 | if ((bp = dp->b_actf) == NULL) { |
357 | um->um_tab.b_actf = dp->b_forw; | |
358 | goto loop; | |
359 | } | |
d565635a BJ |
360 | teunit = TEUNIT(bp->b_dev); |
361 | ui = tedinfo[teunit]; | |
71236e46 BJ |
362 | /* |
363 | * Record pre-transfer status (e.g. for TM_SENSE) | |
364 | */ | |
d565635a | 365 | sc = &te_softc[teunit]; |
71236e46 BJ |
366 | addr = (struct device *)um->um_addr; |
367 | addr->tmcs = (ui->ui_slave << 8); | |
7e00c42b BJ |
368 | sc->sc_dsreg = addr->tmcs; |
369 | sc->sc_erreg = addr->tmer; | |
370 | sc->sc_resid = addr->tmbc; | |
71236e46 BJ |
371 | /* |
372 | * Default is that last command was NOT a write command; | |
373 | * if we do a write command we will notice this in tmintr(). | |
374 | */ | |
375 | sc->sc_lastiow = 1; | |
376 | if (sc->sc_openf < 0 || (addr->tmcs&TM_CUR) == 0) { | |
377 | /* | |
d565635a BJ |
378 | * Have had a hard error on a non-raw tape |
379 | * or the tape unit is now unavailable | |
380 | * (e.g. taken off line). | |
71236e46 BJ |
381 | */ |
382 | bp->b_flags |= B_ERROR; | |
d75e5c3e BJ |
383 | goto next; |
384 | } | |
d565635a BJ |
385 | if (bp == &ctmbuf[TMUNIT(bp->b_dev)]) { |
386 | /* | |
387 | * Execute control operation with the specified count. | |
388 | */ | |
71236e46 BJ |
389 | if (bp->b_command == TM_SENSE) |
390 | goto next; | |
71236e46 BJ |
391 | um->um_tab.b_active = |
392 | bp->b_command == TM_REW ? SREW : SCOM; | |
393 | if (bp->b_command == TM_SFORW || bp->b_command == TM_SREV) | |
394 | addr->tmbc = bp->b_repcnt; | |
d1330646 | 395 | goto dobpcmd; |
71236e46 | 396 | } |
d565635a BJ |
397 | /* |
398 | * The following checks handle boundary cases for operation | |
399 | * on non-raw tapes. On raw tapes the initialization of | |
400 | * sc->sc_nxrec by tmphys causes them to be skipped normally | |
401 | * (except in the case of retries). | |
402 | */ | |
403 | if (dbtofsb(bp->b_blkno) > sc->sc_nxrec) { | |
404 | /* | |
405 | * Can't read past known end-of-file. | |
406 | */ | |
407 | bp->b_flags |= B_ERROR; | |
408 | bp->b_error = ENXIO; | |
409 | goto next; | |
410 | } | |
411 | if (dbtofsb(bp->b_blkno) == sc->sc_nxrec && | |
412 | bp->b_flags&B_READ) { | |
413 | /* | |
414 | * Reading at end of file returns 0 bytes. | |
415 | */ | |
416 | bp->b_resid = bp->b_bcount; | |
417 | clrbuf(bp); | |
418 | goto next; | |
419 | } | |
420 | if ((bp->b_flags&B_READ) == 0) | |
421 | /* | |
422 | * Writing sets EOF | |
423 | */ | |
424 | sc->sc_nxrec = dbtofsb(bp->b_blkno) + 1; | |
71236e46 BJ |
425 | /* |
426 | * If the data transfer command is in the correct place, | |
427 | * set up all the registers except the csr, and give | |
428 | * control over to the UNIBUS adapter routines, to | |
429 | * wait for resources to start the i/o. | |
430 | */ | |
7e00c42b | 431 | if ((blkno = sc->sc_blkno) == dbtofsb(bp->b_blkno)) { |
3f3a34c3 | 432 | addr->tmbc = -bp->b_bcount; |
d75e5c3e | 433 | if ((bp->b_flags&B_READ) == 0) { |
7e00c42b | 434 | if (um->um_tab.b_errcnt) |
d565635a | 435 | cmd = TM_WIRG; |
d75e5c3e | 436 | else |
d565635a | 437 | cmd = TM_WCOM; |
d75e5c3e | 438 | } else |
d565635a | 439 | cmd = TM_RCOM; |
7e00c42b | 440 | um->um_tab.b_active = SIO; |
d565635a | 441 | um->um_cmd = sc->sc_dens|cmd; |
80905075 | 442 | #ifdef notdef |
d1330646 | 443 | if (tmreverseop(sc->sc_lastcmd)) |
d565635a | 444 | while (addr->tmer & TMER_SDWN) |
d1330646 | 445 | tmgapsdcnt++; |
d1330646 | 446 | sc->sc_lastcmd = TM_RCOM; /* will serve */ |
80905075 | 447 | #endif |
a0eab615 | 448 | (void) ubago(ui); |
d75e5c3e BJ |
449 | return; |
450 | } | |
71236e46 | 451 | /* |
d565635a BJ |
452 | * Tape positioned incorrectly; |
453 | * set to seek forwards or backwards to the correct spot. | |
454 | * This happens for raw tapes only on error retries. | |
71236e46 | 455 | */ |
7e00c42b | 456 | um->um_tab.b_active = SSEEK; |
d75e5c3e | 457 | if (blkno < dbtofsb(bp->b_blkno)) { |
d1330646 | 458 | bp->b_command = TM_SFORW; |
3f3a34c3 | 459 | addr->tmbc = blkno - dbtofsb(bp->b_blkno); |
d75e5c3e | 460 | } else { |
d1330646 | 461 | bp->b_command = TM_SREV; |
3f3a34c3 | 462 | addr->tmbc = dbtofsb(bp->b_blkno) - blkno; |
d75e5c3e | 463 | } |
d1330646 | 464 | dobpcmd: |
80905075 | 465 | #ifdef notdef |
d565635a BJ |
466 | /* |
467 | * It is strictly necessary to wait for the tape | |
468 | * to stop before changing directions, but the TC11 | |
469 | * handles this for us. | |
470 | */ | |
d1330646 BJ |
471 | if (tmreverseop(sc->sc_lastcmd) != tmreverseop(bp->b_command)) |
472 | while (addr->tmer & TM_SDWN) | |
473 | tmgapsdcnt++; | |
d1330646 | 474 | sc->sc_lastcmd = bp->b_command; |
80905075 | 475 | #endif |
d565635a BJ |
476 | /* |
477 | * Do the command in bp. | |
478 | */ | |
479 | addr->tmcs = (sc->sc_dens | bp->b_command); | |
d75e5c3e BJ |
480 | return; |
481 | ||
482 | next: | |
71236e46 BJ |
483 | /* |
484 | * Done with this operation due to error or | |
485 | * the fact that it doesn't do anything. | |
486 | * Release UBA resources (if any), dequeue | |
487 | * the transfer and continue processing this slave. | |
488 | */ | |
489 | if (um->um_ubinfo) | |
0801d37f | 490 | ubadone(um); |
71236e46 BJ |
491 | um->um_tab.b_errcnt = 0; |
492 | dp->b_actf = bp->av_forw; | |
d75e5c3e BJ |
493 | iodone(bp); |
494 | goto loop; | |
495 | } | |
496 | ||
71236e46 BJ |
497 | /* |
498 | * The UNIBUS resources we needed have been | |
499 | * allocated to us; start the device. | |
500 | */ | |
e4271c68 | 501 | tmdgo(um) |
89bd2f01 | 502 | register struct uba_ctlr *um; |
3f3a34c3 | 503 | { |
e4271c68 | 504 | register struct device *addr = (struct device *)um->um_addr; |
7e00c42b | 505 | |
e4271c68 BJ |
506 | addr->tmba = um->um_ubinfo; |
507 | addr->tmcs = um->um_cmd | ((um->um_ubinfo >> 12) & 0x30); | |
3f3a34c3 BJ |
508 | } |
509 | ||
71236e46 BJ |
510 | /* |
511 | * Tm interrupt routine. | |
512 | */ | |
7e00c42b | 513 | /*ARGSUSED*/ |
afb907f2 BJ |
514 | tmintr(tm11) |
515 | int tm11; | |
d75e5c3e | 516 | { |
71236e46 | 517 | struct buf *dp; |
d75e5c3e | 518 | register struct buf *bp; |
89bd2f01 | 519 | register struct uba_ctlr *um = tmminfo[tm11]; |
d565635a BJ |
520 | register struct device *addr; |
521 | register struct te_softc *sc; | |
522 | int teunit; | |
d75e5c3e BJ |
523 | register state; |
524 | ||
d565635a BJ |
525 | if ((dp = um->um_tab.b_actf) == NULL) |
526 | return; | |
527 | bp = dp->b_actf; | |
528 | teunit = TEUNIT(bp->b_dev); | |
529 | addr = (struct device *)tedinfo[teunit]->ui_addr; | |
71236e46 BJ |
530 | /* |
531 | * If last command was a rewind, and tape is still | |
532 | * rewinding, wait for the rewind complete interrupt. | |
533 | */ | |
534 | if (um->um_tab.b_active == SREW) { | |
535 | um->um_tab.b_active = SCOM; | |
d565635a | 536 | if (addr->tmer&TMER_RWS) |
71236e46 | 537 | return; |
d75e5c3e | 538 | } |
71236e46 BJ |
539 | /* |
540 | * An operation completed... record status | |
541 | */ | |
d565635a | 542 | sc = &te_softc[teunit]; |
7e00c42b BJ |
543 | sc->sc_dsreg = addr->tmcs; |
544 | sc->sc_erreg = addr->tmer; | |
545 | sc->sc_resid = addr->tmbc; | |
d75e5c3e | 546 | if ((bp->b_flags & B_READ) == 0) |
71236e46 | 547 | sc->sc_lastiow = 1; |
7e00c42b BJ |
548 | state = um->um_tab.b_active; |
549 | um->um_tab.b_active = 0; | |
71236e46 BJ |
550 | /* |
551 | * Check for errors. | |
552 | */ | |
553 | if (addr->tmcs&TM_ERR) { | |
d565635a | 554 | while (addr->tmer & TMER_SDWN) |
d75e5c3e | 555 | ; /* await settle down */ |
71236e46 | 556 | /* |
d565635a | 557 | * If we hit the end of the tape file, update our position. |
71236e46 | 558 | */ |
d565635a | 559 | if (addr->tmer&TMER_EOF) { |
71236e46 BJ |
560 | tmseteof(bp); /* set blkno and nxrec */ |
561 | state = SCOM; /* force completion */ | |
562 | /* | |
563 | * Stuff bc so it will be unstuffed correctly | |
564 | * later to get resid. | |
565 | */ | |
3f3a34c3 | 566 | addr->tmbc = -bp->b_bcount; |
71236e46 | 567 | goto opdone; |
d75e5c3e | 568 | } |
71236e46 | 569 | /* |
d565635a BJ |
570 | * If we were reading raw tape and the only error was that the |
571 | * record was too long, then we don't consider this an error. | |
71236e46 | 572 | */ |
d565635a BJ |
573 | if (bp == &rtmbuf[TMUNIT(bp->b_dev)] && (bp->b_flags&B_READ) && |
574 | (addr->tmer&(TMER_HARD|TMER_SOFT)) == TMER_RLE) | |
71236e46 BJ |
575 | goto ignoreerr; |
576 | /* | |
577 | * If error is not hard, and this was an i/o operation | |
578 | * retry up to 8 times. | |
579 | */ | |
d565635a | 580 | if ((addr->tmer&TMER_HARD)==0 && state==SIO) { |
7e00c42b | 581 | if (++um->um_tab.b_errcnt < 7) { |
7e00c42b | 582 | sc->sc_blkno++; |
0801d37f | 583 | ubadone(um); |
71236e46 | 584 | goto opcont; |
d75e5c3e | 585 | } |
71236e46 BJ |
586 | } else |
587 | /* | |
588 | * Hard or non-i/o errors on non-raw tape | |
589 | * cause it to close. | |
590 | */ | |
d565635a | 591 | if (sc->sc_openf>0 && bp != &rtmbuf[TMUNIT(bp->b_dev)]) |
71236e46 BJ |
592 | sc->sc_openf = -1; |
593 | /* | |
594 | * Couldn't recover error | |
595 | */ | |
80905075 | 596 | printf("te%d: hard error bn%d er=%b\n", minor(bp->b_dev)&03, |
d565635a | 597 | bp->b_blkno, sc->sc_erreg, TMER_BITS); |
d75e5c3e | 598 | bp->b_flags |= B_ERROR; |
71236e46 | 599 | goto opdone; |
d75e5c3e | 600 | } |
71236e46 BJ |
601 | /* |
602 | * Advance tape control FSM. | |
603 | */ | |
604 | ignoreerr: | |
d75e5c3e BJ |
605 | switch (state) { |
606 | ||
607 | case SIO: | |
71236e46 BJ |
608 | /* |
609 | * Read/write increments tape block number | |
610 | */ | |
7e00c42b | 611 | sc->sc_blkno++; |
71236e46 | 612 | goto opdone; |
d75e5c3e BJ |
613 | |
614 | case SCOM: | |
71236e46 | 615 | /* |
d565635a | 616 | * For forward/backward space record update current position. |
71236e46 | 617 | */ |
d565635a | 618 | if (bp == &ctmbuf[TMUNIT(bp->b_dev)]) |
71236e46 BJ |
619 | switch (bp->b_command) { |
620 | ||
621 | case TM_SFORW: | |
622 | sc->sc_blkno -= bp->b_repcnt; | |
d565635a | 623 | break; |
71236e46 BJ |
624 | |
625 | case TM_SREV: | |
626 | sc->sc_blkno += bp->b_repcnt; | |
d565635a | 627 | break; |
d75e5c3e | 628 | } |
d565635a | 629 | goto opdone; |
d75e5c3e BJ |
630 | |
631 | case SSEEK: | |
7e00c42b | 632 | sc->sc_blkno = dbtofsb(bp->b_blkno); |
71236e46 | 633 | goto opcont; |
d75e5c3e BJ |
634 | |
635 | default: | |
71236e46 | 636 | panic("tmintr"); |
d75e5c3e | 637 | } |
71236e46 BJ |
638 | opdone: |
639 | /* | |
640 | * Reset error count and remove | |
641 | * from device queue. | |
642 | */ | |
643 | um->um_tab.b_errcnt = 0; | |
644 | dp->b_actf = bp->av_forw; | |
645 | bp->b_resid = -addr->tmbc; | |
0801d37f | 646 | ubadone(um); |
71236e46 BJ |
647 | iodone(bp); |
648 | /* | |
649 | * Circulate slave to end of controller | |
650 | * queue to give other slaves a chance. | |
651 | */ | |
652 | um->um_tab.b_actf = dp->b_forw; | |
653 | if (dp->b_actf) { | |
654 | dp->b_forw = NULL; | |
655 | if (um->um_tab.b_actf == NULL) | |
656 | um->um_tab.b_actf = dp; | |
657 | else | |
658 | um->um_tab.b_actl->b_forw = dp; | |
659 | um->um_tab.b_actl = dp; | |
660 | } | |
661 | if (um->um_tab.b_actf == 0) | |
662 | return; | |
663 | opcont: | |
664 | tmstart(um); | |
d75e5c3e BJ |
665 | } |
666 | ||
667 | tmseteof(bp) | |
668 | register struct buf *bp; | |
669 | { | |
d565635a | 670 | register int teunit = TEUNIT(bp->b_dev); |
3f3a34c3 | 671 | register struct device *addr = |
d565635a BJ |
672 | (struct device *)tedinfo[teunit]->ui_addr; |
673 | register struct te_softc *sc = &te_softc[teunit]; | |
d75e5c3e | 674 | |
d565635a | 675 | if (bp == &ctmbuf[TMUNIT(bp->b_dev)]) { |
7e00c42b | 676 | if (sc->sc_blkno > dbtofsb(bp->b_blkno)) { |
d75e5c3e | 677 | /* reversing */ |
7e00c42b BJ |
678 | sc->sc_nxrec = dbtofsb(bp->b_blkno) - addr->tmbc; |
679 | sc->sc_blkno = sc->sc_nxrec; | |
d75e5c3e BJ |
680 | } else { |
681 | /* spacing forward */ | |
7e00c42b BJ |
682 | sc->sc_blkno = dbtofsb(bp->b_blkno) + addr->tmbc; |
683 | sc->sc_nxrec = sc->sc_blkno - 1; | |
d75e5c3e BJ |
684 | } |
685 | return; | |
686 | } | |
687 | /* eof on read */ | |
7e00c42b | 688 | sc->sc_nxrec = dbtofsb(bp->b_blkno); |
d75e5c3e BJ |
689 | } |
690 | ||
691 | tmread(dev) | |
71236e46 | 692 | dev_t dev; |
d75e5c3e BJ |
693 | { |
694 | ||
695 | tmphys(dev); | |
89bd2f01 BJ |
696 | if (u.u_error) |
697 | return; | |
71236e46 | 698 | physio(tmstrategy, &rtmbuf[TMUNIT(dev)], dev, B_READ, minphys); |
d75e5c3e BJ |
699 | } |
700 | ||
701 | tmwrite(dev) | |
71236e46 | 702 | dev_t dev; |
d75e5c3e BJ |
703 | { |
704 | ||
705 | tmphys(dev); | |
89bd2f01 BJ |
706 | if (u.u_error) |
707 | return; | |
71236e46 | 708 | physio(tmstrategy, &rtmbuf[TMUNIT(dev)], dev, B_WRITE, minphys); |
d75e5c3e BJ |
709 | } |
710 | ||
d565635a BJ |
711 | /* |
712 | * Check that a raw device exists. | |
713 | * If it does, set up sc_blkno and sc_nxrec | |
714 | * so that the tape will appear positioned correctly. | |
715 | */ | |
d75e5c3e | 716 | tmphys(dev) |
71236e46 | 717 | dev_t dev; |
d75e5c3e | 718 | { |
d565635a | 719 | register int teunit = TEUNIT(dev); |
d75e5c3e | 720 | register daddr_t a; |
d565635a BJ |
721 | register struct te_softc *sc; |
722 | register struct uba_device *ui; | |
d75e5c3e | 723 | |
d565635a | 724 | if (teunit >= NTE || (ui=tedinfo[teunit]) == 0 || ui->ui_alive == 0) { |
89bd2f01 BJ |
725 | u.u_error = ENXIO; |
726 | return; | |
727 | } | |
d565635a | 728 | sc = &te_softc[teunit]; |
d75e5c3e | 729 | a = dbtofsb(u.u_offset >> 9); |
7e00c42b BJ |
730 | sc->sc_blkno = a; |
731 | sc->sc_nxrec = a + 1; | |
d75e5c3e BJ |
732 | } |
733 | ||
71236e46 BJ |
734 | tmreset(uban) |
735 | int uban; | |
736 | { | |
89bd2f01 | 737 | register struct uba_ctlr *um; |
d565635a | 738 | register tm11, teunit; |
89bd2f01 | 739 | register struct uba_device *ui; |
71236e46 BJ |
740 | register struct buf *dp; |
741 | ||
afb907f2 BJ |
742 | for (tm11 = 0; tm11 < NTM; tm11++) { |
743 | if ((um = tmminfo[tm11]) == 0 || um->um_alive == 0 || | |
71236e46 BJ |
744 | um->um_ubanum != uban) |
745 | continue; | |
80905075 | 746 | printf(" tm%d", tm11); |
71236e46 BJ |
747 | um->um_tab.b_active = 0; |
748 | um->um_tab.b_actf = um->um_tab.b_actl = 0; | |
749 | if (um->um_ubinfo) { | |
750 | printf("<%d>", (um->um_ubinfo>>28)&0xf); | |
0801d37f | 751 | ubadone(um); |
71236e46 BJ |
752 | } |
753 | ((struct device *)(um->um_addr))->tmcs = TM_DCLR; | |
d565635a BJ |
754 | for (teunit = 0; teunit < NTE; teunit++) { |
755 | if ((ui = tedinfo[teunit]) == 0 || ui->ui_mi != um || | |
756 | ui->ui_alive == 0) | |
71236e46 | 757 | continue; |
d565635a | 758 | dp = &teutab[teunit]; |
71236e46 BJ |
759 | dp->b_active = 0; |
760 | dp->b_forw = 0; | |
761 | if (um->um_tab.b_actf == NULL) | |
762 | um->um_tab.b_actf = dp; | |
763 | else | |
764 | um->um_tab.b_actl->b_forw = dp; | |
765 | um->um_tab.b_actl = dp; | |
d565635a | 766 | te_softc[teunit].sc_openf = -1; |
71236e46 BJ |
767 | } |
768 | tmstart(um); | |
769 | } | |
770 | } | |
771 | ||
d75e5c3e BJ |
772 | /*ARGSUSED*/ |
773 | tmioctl(dev, cmd, addr, flag) | |
774 | caddr_t addr; | |
775 | dev_t dev; | |
776 | { | |
d565635a BJ |
777 | int teunit = TEUNIT(dev); |
778 | register struct te_softc *sc = &te_softc[teunit]; | |
779 | register struct buf *bp = &ctmbuf[TMUNIT(dev)]; | |
d75e5c3e BJ |
780 | register callcount; |
781 | int fcount; | |
782 | struct mtop mtop; | |
783 | struct mtget mtget; | |
784 | /* we depend of the values and order of the MT codes here */ | |
71236e46 BJ |
785 | static tmops[] = |
786 | {TM_WEOF,TM_SFORW,TM_SREV,TM_SFORW,TM_SREV,TM_REW,TM_OFFL,TM_SENSE}; | |
d75e5c3e | 787 | |
71236e46 | 788 | switch (cmd) { |
d75e5c3e BJ |
789 | case MTIOCTOP: /* tape operation */ |
790 | if (copyin((caddr_t)addr, (caddr_t)&mtop, sizeof(mtop))) { | |
791 | u.u_error = EFAULT; | |
792 | return; | |
793 | } | |
794 | switch(mtop.mt_op) { | |
71236e46 BJ |
795 | case MTWEOF: |
796 | callcount = mtop.mt_count; | |
797 | fcount = 1; | |
798 | break; | |
799 | case MTFSF: case MTBSF: | |
d75e5c3e BJ |
800 | callcount = mtop.mt_count; |
801 | fcount = INF; | |
802 | break; | |
803 | case MTFSR: case MTBSR: | |
804 | callcount = 1; | |
805 | fcount = mtop.mt_count; | |
806 | break; | |
77115c00 | 807 | case MTREW: case MTOFFL: case MTNOP: |
d75e5c3e BJ |
808 | callcount = 1; |
809 | fcount = 1; | |
810 | break; | |
811 | default: | |
812 | u.u_error = ENXIO; | |
813 | return; | |
814 | } | |
71236e46 | 815 | if (callcount <= 0 || fcount <= 0) { |
d75e5c3e | 816 | u.u_error = ENXIO; |
71236e46 BJ |
817 | return; |
818 | } | |
819 | while (--callcount >= 0) { | |
e4271c68 | 820 | tmcommand(dev, tmops[mtop.mt_op], fcount); |
d75e5c3e | 821 | if ((mtop.mt_op == MTFSR || mtop.mt_op == MTBSR) && |
71236e46 | 822 | bp->b_resid) { |
d75e5c3e BJ |
823 | u.u_error = EIO; |
824 | break; | |
825 | } | |
d565635a | 826 | if ((bp->b_flags&B_ERROR) || sc->sc_erreg&TMER_BOT) |
d75e5c3e BJ |
827 | break; |
828 | } | |
71236e46 | 829 | geterror(bp); |
d75e5c3e BJ |
830 | return; |
831 | case MTIOCGET: | |
7e00c42b BJ |
832 | mtget.mt_dsreg = sc->sc_dsreg; |
833 | mtget.mt_erreg = sc->sc_erreg; | |
834 | mtget.mt_resid = sc->sc_resid; | |
d75e5c3e BJ |
835 | if (copyout((caddr_t)&mtget, addr, sizeof(mtget))) |
836 | u.u_error = EFAULT; | |
837 | return; | |
838 | default: | |
839 | u.u_error = ENXIO; | |
840 | } | |
841 | } | |
842 | ||
843 | #define DBSIZE 20 | |
844 | ||
7455bf3e | 845 | tmdump() |
d75e5c3e | 846 | { |
89bd2f01 | 847 | register struct uba_device *ui; |
3f3a34c3 BJ |
848 | register struct uba_regs *up; |
849 | register struct device *addr; | |
5aa9d5ea RE |
850 | int blk, num; |
851 | int start; | |
d75e5c3e | 852 | |
5aa9d5ea RE |
853 | start = 0; |
854 | num = maxfree; | |
855 | #define phys(a,b) ((b)((int)(a)&0x7fffffff)) | |
d565635a | 856 | if (tedinfo[0] == 0) |
2536c16c | 857 | return (ENXIO); |
d565635a | 858 | ui = phys(tedinfo[0], struct uba_device *); |
3f3a34c3 BJ |
859 | up = phys(ui->ui_hd, struct uba_hd *)->uh_physuba; |
860 | #if VAX780 | |
861 | if (cpu == VAX_780) | |
862 | ubainit(up); | |
d75e5c3e | 863 | #endif |
77115c00 | 864 | DELAY(1000000); |
3f3a34c3 BJ |
865 | addr = (struct device *)ui->ui_physaddr; |
866 | tmwait(addr); | |
71236e46 | 867 | addr->tmcs = TM_DCLR | TM_GO; |
d75e5c3e BJ |
868 | while (num > 0) { |
869 | blk = num > DBSIZE ? DBSIZE : num; | |
3f3a34c3 | 870 | tmdwrite(start, blk, addr, up); |
d75e5c3e BJ |
871 | start += blk; |
872 | num -= blk; | |
873 | } | |
5aa9d5ea RE |
874 | tmeof(addr); |
875 | tmeof(addr); | |
7e00c42b | 876 | tmwait(addr); |
2536c16c BJ |
877 | if (addr->tmcs&TM_ERR) |
878 | return (EIO); | |
71236e46 | 879 | addr->tmcs = TM_REW | TM_GO; |
5aa9d5ea | 880 | tmwait(addr); |
7455bf3e | 881 | return (0); |
d75e5c3e BJ |
882 | } |
883 | ||
71236e46 BJ |
884 | tmdwrite(dbuf, num, addr, up) |
885 | register dbuf, num; | |
3f3a34c3 BJ |
886 | register struct device *addr; |
887 | struct uba_regs *up; | |
d75e5c3e | 888 | { |
3f3a34c3 BJ |
889 | register struct pte *io; |
890 | register int npf; | |
0a51498e | 891 | |
3f3a34c3 | 892 | tmwait(addr); |
3f3a34c3 | 893 | io = up->uba_map; |
d75e5c3e | 894 | npf = num+1; |
0a51498e | 895 | while (--npf != 0) |
89bd2f01 | 896 | *(int *)io++ = (dbuf++ | (1<<UBAMR_DPSHIFT) | UBAMR_MRV); |
3f3a34c3 BJ |
897 | *(int *)io = 0; |
898 | addr->tmbc = -(num*NBPG); | |
899 | addr->tmba = 0; | |
71236e46 | 900 | addr->tmcs = TM_WCOM | TM_GO; |
d75e5c3e BJ |
901 | } |
902 | ||
3f3a34c3 BJ |
903 | tmwait(addr) |
904 | register struct device *addr; | |
d75e5c3e | 905 | { |
0a51498e | 906 | register s; |
d75e5c3e BJ |
907 | |
908 | do | |
3f3a34c3 | 909 | s = addr->tmcs; |
71236e46 | 910 | while ((s & TM_CUR) == 0); |
d75e5c3e BJ |
911 | } |
912 | ||
3f3a34c3 BJ |
913 | tmeof(addr) |
914 | struct device *addr; | |
d75e5c3e BJ |
915 | { |
916 | ||
3f3a34c3 | 917 | tmwait(addr); |
71236e46 | 918 | addr->tmcs = TM_WEOF | TM_GO; |
d75e5c3e BJ |
919 | } |
920 | #endif |