Commit | Line | Data |
---|---|---|
a0eab615 | 1 | /* tm.c 4.25 %G% */ |
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 BJ |
16 | #include "../h/param.h" |
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 BJ |
99 | u_short sc_dens; /* prototype command with density info */ |
100 | } te_softc[NTM]; | |
a0eab615 BJ |
101 | #ifdef unneeded |
102 | int tmgapsdcnt; /* DEBUG */ | |
103 | #endif | |
d75e5c3e | 104 | |
71236e46 | 105 | /* |
d565635a BJ |
106 | * States for um->um_tab.b_active, the per controller state flag. |
107 | * This is used to sequence control in the driver. | |
71236e46 | 108 | */ |
d75e5c3e BJ |
109 | #define SSEEK 1 /* seeking */ |
110 | #define SIO 2 /* doing seq i/o */ | |
111 | #define SCOM 3 /* sending control command */ | |
71236e46 | 112 | #define SREW 4 /* sending a drive rewind */ |
d75e5c3e | 113 | |
5aa9d5ea RE |
114 | /* |
115 | * Determine if there is a controller for | |
116 | * a tm at address reg. Our goal is to make the | |
117 | * device interrupt. | |
5aa9d5ea | 118 | */ |
71236e46 | 119 | tmprobe(reg) |
3f3a34c3 BJ |
120 | caddr_t reg; |
121 | { | |
d565635a | 122 | register int br, cvec; /* must be r11,r10; value-result */ |
5aa9d5ea | 123 | |
71236e46 | 124 | #ifdef lint |
a0eab615 | 125 | br = 0; cvec = br; br = cvec; |
71236e46 BJ |
126 | #endif |
127 | ((struct device *)reg)->tmcs = TM_IE; | |
3f3a34c3 | 128 | /* |
afb907f2 | 129 | * If this is a tm11, it ought to have interrupted |
3f3a34c3 | 130 | * by now, if it isn't (ie: it is a ts04) then we just |
d763a2b7 BJ |
131 | * hope that it didn't interrupt, so autoconf will ignore it. |
132 | * Just in case, we will reference one | |
3f3a34c3 | 133 | * of the more distant registers, and hope for a machine |
d763a2b7 | 134 | * check, or similar disaster if this is a ts. |
7e00c42b BJ |
135 | * |
136 | * Note: on an 11/780, badaddr will just generate | |
137 | * a uba error for a ts; but our caller will notice that | |
138 | * so we won't check for it. | |
3f3a34c3 | 139 | */ |
a0eab615 | 140 | if (badaddr((caddr_t)&((struct device *)reg)->tmrd, 2)) |
d763a2b7 BJ |
141 | return (0); |
142 | return (1); | |
3f3a34c3 BJ |
143 | } |
144 | ||
71236e46 BJ |
145 | /* |
146 | * Due to a design flaw, we cannot ascertain if the tape | |
147 | * exists or not unless it is on line - ie: unless a tape is | |
148 | * mounted. This is too servere a restriction to bear, | |
149 | * so all units are assumed to exist. | |
150 | */ | |
151 | /*ARGSUSED*/ | |
e4271c68 | 152 | tmslave(ui, reg) |
89bd2f01 | 153 | struct uba_device *ui; |
3f3a34c3 BJ |
154 | caddr_t reg; |
155 | { | |
d763a2b7 | 156 | |
d763a2b7 | 157 | return (1); |
3f3a34c3 BJ |
158 | } |
159 | ||
71236e46 | 160 | /* |
d565635a | 161 | * Record attachment of the unit to the controller. |
71236e46 BJ |
162 | */ |
163 | /*ARGSUSED*/ | |
164 | tmattach(ui) | |
89bd2f01 | 165 | struct uba_device *ui; |
71236e46 BJ |
166 | { |
167 | ||
d565635a BJ |
168 | /* |
169 | * Tetotm is used in TMUNIT to index the ctmbuf and rtmbuf | |
170 | * arrays given a te unit number. | |
171 | */ | |
172 | tetotm[ui->ui_unit] = ui->ui_mi->um_ctlr; | |
71236e46 BJ |
173 | } |
174 | ||
175 | /* | |
176 | * Open the device. Tapes are unique open | |
177 | * devices, so we refuse if it is already open. | |
178 | * We also check that a tape is available, and | |
d565635a BJ |
179 | * don't block waiting here; if you want to wait |
180 | * for a tape you should timeout in user code. | |
71236e46 | 181 | */ |
d75e5c3e BJ |
182 | tmopen(dev, flag) |
183 | dev_t dev; | |
184 | int flag; | |
185 | { | |
d565635a | 186 | register int teunit; |
89bd2f01 | 187 | register struct uba_device *ui; |
d565635a BJ |
188 | register struct te_softc *sc; |
189 | int dens; | |
d75e5c3e | 190 | |
d565635a BJ |
191 | teunit = TEUNIT(dev); |
192 | if (teunit>=NTE || (sc = &te_softc[teunit])->sc_openf || | |
193 | (ui = tedinfo[teunit]) == 0 || ui->ui_alive == 0) { | |
71236e46 | 194 | u.u_error = ENXIO; |
d75e5c3e BJ |
195 | return; |
196 | } | |
71236e46 | 197 | tmcommand(dev, TM_SENSE, 1); |
d565635a BJ |
198 | dens = TM_IE | TM_GO | (ui->ui_slave << 8); |
199 | if ((minor(dev) & T_1600BPI) == 0) | |
200 | dens |= TM_D800; | |
201 | if ((sc->sc_erreg&(TMER_SELR|TMER_TUR)) != (TMER_SELR|TMER_TUR) || | |
202 | (sc->sc_erreg&TMER_BOT) == 0 && (flag&FWRITE) && | |
203 | dens != sc->sc_dens || | |
204 | (flag&(FREAD|FWRITE)) == FWRITE && sc->sc_erreg&TMER_WRL) { | |
205 | /* | |
206 | * Not online or density switch in mid-tape or write locked. | |
207 | */ | |
71236e46 | 208 | u.u_error = EIO; |
d75e5c3e BJ |
209 | return; |
210 | } | |
71236e46 | 211 | sc->sc_openf = 1; |
7e00c42b BJ |
212 | sc->sc_blkno = (daddr_t)0; |
213 | sc->sc_nxrec = INF; | |
71236e46 | 214 | sc->sc_lastiow = 0; |
d565635a | 215 | sc->sc_dens = dens; |
d75e5c3e BJ |
216 | } |
217 | ||
71236e46 BJ |
218 | /* |
219 | * Close tape device. | |
220 | * | |
221 | * If tape was open for writing or last operation was | |
222 | * a write, then write two EOF's and backspace over the last one. | |
223 | * Unless this is a non-rewinding special file, rewind the tape. | |
224 | * Make the tape available to others. | |
225 | */ | |
d75e5c3e BJ |
226 | tmclose(dev, flag) |
227 | register dev_t dev; | |
228 | register flag; | |
229 | { | |
d565635a | 230 | register struct te_softc *sc = &te_softc[TEUNIT(dev)]; |
d75e5c3e | 231 | |
71236e46 BJ |
232 | if (flag == FWRITE || (flag&FWRITE) && sc->sc_lastiow) { |
233 | tmcommand(dev, TM_WEOF, 1); | |
234 | tmcommand(dev, TM_WEOF, 1); | |
235 | tmcommand(dev, TM_SREV, 1); | |
d75e5c3e BJ |
236 | } |
237 | if ((minor(dev)&T_NOREWIND) == 0) | |
d565635a BJ |
238 | /* |
239 | * 0 count means don't hang waiting for rewind complete | |
240 | * rather ctmbuf stays busy until the operation completes | |
241 | * preventing further opens from completing by | |
242 | * preventing a TM_SENSE from completing. | |
243 | */ | |
244 | tmcommand(dev, TM_REW, 0); | |
7e00c42b | 245 | sc->sc_openf = 0; |
d75e5c3e BJ |
246 | } |
247 | ||
71236e46 BJ |
248 | /* |
249 | * Execute a command on the tape drive | |
250 | * a specified number of times. | |
251 | */ | |
e4271c68 | 252 | tmcommand(dev, com, count) |
d75e5c3e BJ |
253 | dev_t dev; |
254 | int com, count; | |
255 | { | |
256 | register struct buf *bp; | |
257 | ||
71236e46 | 258 | bp = &ctmbuf[TMUNIT(dev)]; |
d75e5c3e BJ |
259 | (void) spl5(); |
260 | while (bp->b_flags&B_BUSY) { | |
d565635a BJ |
261 | /* |
262 | * This special check is because B_BUSY never | |
263 | * gets cleared in the non-waiting rewind case. | |
264 | */ | |
265 | if (bp->b_command == TM_REW && bp->b_repcnt == 0 && | |
266 | (bp->b_flags&B_DONE)) | |
267 | break; | |
d75e5c3e BJ |
268 | bp->b_flags |= B_WANTED; |
269 | sleep((caddr_t)bp, PRIBIO); | |
270 | } | |
271 | bp->b_flags = B_BUSY|B_READ; | |
272 | (void) spl0(); | |
273 | bp->b_dev = dev; | |
274 | bp->b_repcnt = -count; | |
275 | bp->b_command = com; | |
276 | bp->b_blkno = 0; | |
277 | tmstrategy(bp); | |
d565635a BJ |
278 | /* |
279 | * In case of rewind from close, don't wait. | |
280 | * This is the only case where count can be 0. | |
281 | */ | |
282 | if (count == 0) | |
283 | return; | |
d75e5c3e BJ |
284 | iowait(bp); |
285 | if (bp->b_flags&B_WANTED) | |
286 | wakeup((caddr_t)bp); | |
287 | bp->b_flags &= B_ERROR; | |
288 | } | |
289 | ||
71236e46 | 290 | /* |
d565635a | 291 | * Queue a tape operation. |
71236e46 | 292 | */ |
d75e5c3e BJ |
293 | tmstrategy(bp) |
294 | register struct buf *bp; | |
295 | { | |
d565635a | 296 | int teunit = TEUNIT(bp->b_dev); |
89bd2f01 | 297 | register struct uba_ctlr *um; |
71236e46 | 298 | register struct buf *dp; |
d75e5c3e | 299 | |
71236e46 BJ |
300 | /* |
301 | * Put transfer at end of unit queue | |
302 | */ | |
d565635a | 303 | dp = &teutab[teunit]; |
d75e5c3e BJ |
304 | bp->av_forw = NULL; |
305 | (void) spl5(); | |
71236e46 BJ |
306 | if (dp->b_actf == NULL) { |
307 | dp->b_actf = bp; | |
308 | /* | |
309 | * Transport not already active... | |
310 | * put at end of controller queue. | |
311 | */ | |
312 | dp->b_forw = NULL; | |
d565635a | 313 | um = tedinfo[teunit]->ui_mi; |
71236e46 BJ |
314 | if (um->um_tab.b_actf == NULL) |
315 | um->um_tab.b_actf = dp; | |
316 | else | |
317 | um->um_tab.b_actl->b_forw = dp; | |
318 | um->um_tab.b_actl = dp; | |
319 | } else | |
320 | dp->b_actl->av_forw = bp; | |
321 | dp->b_actl = bp; | |
322 | /* | |
323 | * If the controller is not busy, get | |
324 | * it going. | |
325 | */ | |
326 | if (um->um_tab.b_active == 0) | |
327 | tmstart(um); | |
d75e5c3e BJ |
328 | (void) spl0(); |
329 | } | |
330 | ||
71236e46 BJ |
331 | /* |
332 | * Start activity on a tm controller. | |
333 | */ | |
334 | tmstart(um) | |
89bd2f01 | 335 | register struct uba_ctlr *um; |
d75e5c3e | 336 | { |
71236e46 BJ |
337 | register struct buf *bp, *dp; |
338 | register struct device *addr = (struct device *)um->um_addr; | |
d565635a | 339 | register struct te_softc *sc; |
89bd2f01 | 340 | register struct uba_device *ui; |
d565635a | 341 | int teunit, cmd; |
7e00c42b | 342 | daddr_t blkno; |
d75e5c3e | 343 | |
71236e46 BJ |
344 | /* |
345 | * Look for an idle transport on the controller. | |
346 | */ | |
d75e5c3e | 347 | loop: |
71236e46 | 348 | if ((dp = um->um_tab.b_actf) == NULL) |
d75e5c3e | 349 | return; |
71236e46 BJ |
350 | if ((bp = dp->b_actf) == NULL) { |
351 | um->um_tab.b_actf = dp->b_forw; | |
352 | goto loop; | |
353 | } | |
d565635a BJ |
354 | teunit = TEUNIT(bp->b_dev); |
355 | ui = tedinfo[teunit]; | |
71236e46 BJ |
356 | /* |
357 | * Record pre-transfer status (e.g. for TM_SENSE) | |
358 | */ | |
d565635a | 359 | sc = &te_softc[teunit]; |
71236e46 BJ |
360 | addr = (struct device *)um->um_addr; |
361 | addr->tmcs = (ui->ui_slave << 8); | |
7e00c42b BJ |
362 | sc->sc_dsreg = addr->tmcs; |
363 | sc->sc_erreg = addr->tmer; | |
364 | sc->sc_resid = addr->tmbc; | |
71236e46 BJ |
365 | /* |
366 | * Default is that last command was NOT a write command; | |
367 | * if we do a write command we will notice this in tmintr(). | |
368 | */ | |
369 | sc->sc_lastiow = 1; | |
370 | if (sc->sc_openf < 0 || (addr->tmcs&TM_CUR) == 0) { | |
371 | /* | |
d565635a BJ |
372 | * Have had a hard error on a non-raw tape |
373 | * or the tape unit is now unavailable | |
374 | * (e.g. taken off line). | |
71236e46 BJ |
375 | */ |
376 | bp->b_flags |= B_ERROR; | |
d75e5c3e BJ |
377 | goto next; |
378 | } | |
d565635a BJ |
379 | if (bp == &ctmbuf[TMUNIT(bp->b_dev)]) { |
380 | /* | |
381 | * Execute control operation with the specified count. | |
382 | */ | |
71236e46 BJ |
383 | if (bp->b_command == TM_SENSE) |
384 | goto next; | |
71236e46 BJ |
385 | um->um_tab.b_active = |
386 | bp->b_command == TM_REW ? SREW : SCOM; | |
387 | if (bp->b_command == TM_SFORW || bp->b_command == TM_SREV) | |
388 | addr->tmbc = bp->b_repcnt; | |
d1330646 | 389 | goto dobpcmd; |
71236e46 | 390 | } |
d565635a BJ |
391 | /* |
392 | * The following checks handle boundary cases for operation | |
393 | * on non-raw tapes. On raw tapes the initialization of | |
394 | * sc->sc_nxrec by tmphys causes them to be skipped normally | |
395 | * (except in the case of retries). | |
396 | */ | |
397 | if (dbtofsb(bp->b_blkno) > sc->sc_nxrec) { | |
398 | /* | |
399 | * Can't read past known end-of-file. | |
400 | */ | |
401 | bp->b_flags |= B_ERROR; | |
402 | bp->b_error = ENXIO; | |
403 | goto next; | |
404 | } | |
405 | if (dbtofsb(bp->b_blkno) == sc->sc_nxrec && | |
406 | bp->b_flags&B_READ) { | |
407 | /* | |
408 | * Reading at end of file returns 0 bytes. | |
409 | */ | |
410 | bp->b_resid = bp->b_bcount; | |
411 | clrbuf(bp); | |
412 | goto next; | |
413 | } | |
414 | if ((bp->b_flags&B_READ) == 0) | |
415 | /* | |
416 | * Writing sets EOF | |
417 | */ | |
418 | sc->sc_nxrec = dbtofsb(bp->b_blkno) + 1; | |
71236e46 BJ |
419 | /* |
420 | * If the data transfer command is in the correct place, | |
421 | * set up all the registers except the csr, and give | |
422 | * control over to the UNIBUS adapter routines, to | |
423 | * wait for resources to start the i/o. | |
424 | */ | |
7e00c42b | 425 | if ((blkno = sc->sc_blkno) == dbtofsb(bp->b_blkno)) { |
3f3a34c3 | 426 | addr->tmbc = -bp->b_bcount; |
d75e5c3e | 427 | if ((bp->b_flags&B_READ) == 0) { |
7e00c42b | 428 | if (um->um_tab.b_errcnt) |
d565635a | 429 | cmd = TM_WIRG; |
d75e5c3e | 430 | else |
d565635a | 431 | cmd = TM_WCOM; |
d75e5c3e | 432 | } else |
d565635a | 433 | cmd = TM_RCOM; |
7e00c42b | 434 | um->um_tab.b_active = SIO; |
d565635a | 435 | um->um_cmd = sc->sc_dens|cmd; |
80905075 | 436 | #ifdef notdef |
d1330646 | 437 | if (tmreverseop(sc->sc_lastcmd)) |
d565635a | 438 | while (addr->tmer & TMER_SDWN) |
d1330646 | 439 | tmgapsdcnt++; |
d1330646 | 440 | sc->sc_lastcmd = TM_RCOM; /* will serve */ |
80905075 | 441 | #endif |
a0eab615 | 442 | (void) ubago(ui); |
d75e5c3e BJ |
443 | return; |
444 | } | |
71236e46 | 445 | /* |
d565635a BJ |
446 | * Tape positioned incorrectly; |
447 | * set to seek forwards or backwards to the correct spot. | |
448 | * This happens for raw tapes only on error retries. | |
71236e46 | 449 | */ |
7e00c42b | 450 | um->um_tab.b_active = SSEEK; |
d75e5c3e | 451 | if (blkno < dbtofsb(bp->b_blkno)) { |
d1330646 | 452 | bp->b_command = TM_SFORW; |
3f3a34c3 | 453 | addr->tmbc = blkno - dbtofsb(bp->b_blkno); |
d75e5c3e | 454 | } else { |
d1330646 | 455 | bp->b_command = TM_SREV; |
3f3a34c3 | 456 | addr->tmbc = dbtofsb(bp->b_blkno) - blkno; |
d75e5c3e | 457 | } |
d1330646 | 458 | dobpcmd: |
80905075 | 459 | #ifdef notdef |
d565635a BJ |
460 | /* |
461 | * It is strictly necessary to wait for the tape | |
462 | * to stop before changing directions, but the TC11 | |
463 | * handles this for us. | |
464 | */ | |
d1330646 BJ |
465 | if (tmreverseop(sc->sc_lastcmd) != tmreverseop(bp->b_command)) |
466 | while (addr->tmer & TM_SDWN) | |
467 | tmgapsdcnt++; | |
d1330646 | 468 | sc->sc_lastcmd = bp->b_command; |
80905075 | 469 | #endif |
d565635a BJ |
470 | /* |
471 | * Do the command in bp. | |
472 | */ | |
473 | addr->tmcs = (sc->sc_dens | bp->b_command); | |
d75e5c3e BJ |
474 | return; |
475 | ||
476 | next: | |
71236e46 BJ |
477 | /* |
478 | * Done with this operation due to error or | |
479 | * the fact that it doesn't do anything. | |
480 | * Release UBA resources (if any), dequeue | |
481 | * the transfer and continue processing this slave. | |
482 | */ | |
483 | if (um->um_ubinfo) | |
0801d37f | 484 | ubadone(um); |
71236e46 BJ |
485 | um->um_tab.b_errcnt = 0; |
486 | dp->b_actf = bp->av_forw; | |
d75e5c3e BJ |
487 | iodone(bp); |
488 | goto loop; | |
489 | } | |
490 | ||
71236e46 BJ |
491 | /* |
492 | * The UNIBUS resources we needed have been | |
493 | * allocated to us; start the device. | |
494 | */ | |
e4271c68 | 495 | tmdgo(um) |
89bd2f01 | 496 | register struct uba_ctlr *um; |
3f3a34c3 | 497 | { |
e4271c68 | 498 | register struct device *addr = (struct device *)um->um_addr; |
7e00c42b | 499 | |
e4271c68 BJ |
500 | addr->tmba = um->um_ubinfo; |
501 | addr->tmcs = um->um_cmd | ((um->um_ubinfo >> 12) & 0x30); | |
3f3a34c3 BJ |
502 | } |
503 | ||
71236e46 BJ |
504 | /* |
505 | * Tm interrupt routine. | |
506 | */ | |
7e00c42b | 507 | /*ARGSUSED*/ |
afb907f2 BJ |
508 | tmintr(tm11) |
509 | int tm11; | |
d75e5c3e | 510 | { |
71236e46 | 511 | struct buf *dp; |
d75e5c3e | 512 | register struct buf *bp; |
89bd2f01 | 513 | register struct uba_ctlr *um = tmminfo[tm11]; |
d565635a BJ |
514 | register struct device *addr; |
515 | register struct te_softc *sc; | |
516 | int teunit; | |
d75e5c3e BJ |
517 | register state; |
518 | ||
d565635a BJ |
519 | if ((dp = um->um_tab.b_actf) == NULL) |
520 | return; | |
521 | bp = dp->b_actf; | |
522 | teunit = TEUNIT(bp->b_dev); | |
523 | addr = (struct device *)tedinfo[teunit]->ui_addr; | |
71236e46 BJ |
524 | /* |
525 | * If last command was a rewind, and tape is still | |
526 | * rewinding, wait for the rewind complete interrupt. | |
527 | */ | |
528 | if (um->um_tab.b_active == SREW) { | |
529 | um->um_tab.b_active = SCOM; | |
d565635a | 530 | if (addr->tmer&TMER_RWS) |
71236e46 | 531 | return; |
d75e5c3e | 532 | } |
71236e46 BJ |
533 | /* |
534 | * An operation completed... record status | |
535 | */ | |
d565635a | 536 | sc = &te_softc[teunit]; |
7e00c42b BJ |
537 | sc->sc_dsreg = addr->tmcs; |
538 | sc->sc_erreg = addr->tmer; | |
539 | sc->sc_resid = addr->tmbc; | |
d75e5c3e | 540 | if ((bp->b_flags & B_READ) == 0) |
71236e46 | 541 | sc->sc_lastiow = 1; |
7e00c42b BJ |
542 | state = um->um_tab.b_active; |
543 | um->um_tab.b_active = 0; | |
71236e46 BJ |
544 | /* |
545 | * Check for errors. | |
546 | */ | |
547 | if (addr->tmcs&TM_ERR) { | |
d565635a | 548 | while (addr->tmer & TMER_SDWN) |
d75e5c3e | 549 | ; /* await settle down */ |
71236e46 | 550 | /* |
d565635a | 551 | * If we hit the end of the tape file, update our position. |
71236e46 | 552 | */ |
d565635a | 553 | if (addr->tmer&TMER_EOF) { |
71236e46 BJ |
554 | tmseteof(bp); /* set blkno and nxrec */ |
555 | state = SCOM; /* force completion */ | |
556 | /* | |
557 | * Stuff bc so it will be unstuffed correctly | |
558 | * later to get resid. | |
559 | */ | |
3f3a34c3 | 560 | addr->tmbc = -bp->b_bcount; |
71236e46 | 561 | goto opdone; |
d75e5c3e | 562 | } |
71236e46 | 563 | /* |
d565635a BJ |
564 | * If we were reading raw tape and the only error was that the |
565 | * record was too long, then we don't consider this an error. | |
71236e46 | 566 | */ |
d565635a BJ |
567 | if (bp == &rtmbuf[TMUNIT(bp->b_dev)] && (bp->b_flags&B_READ) && |
568 | (addr->tmer&(TMER_HARD|TMER_SOFT)) == TMER_RLE) | |
71236e46 BJ |
569 | goto ignoreerr; |
570 | /* | |
571 | * If error is not hard, and this was an i/o operation | |
572 | * retry up to 8 times. | |
573 | */ | |
d565635a | 574 | if ((addr->tmer&TMER_HARD)==0 && state==SIO) { |
7e00c42b | 575 | if (++um->um_tab.b_errcnt < 7) { |
7e00c42b | 576 | sc->sc_blkno++; |
0801d37f | 577 | ubadone(um); |
71236e46 | 578 | goto opcont; |
d75e5c3e | 579 | } |
71236e46 BJ |
580 | } else |
581 | /* | |
582 | * Hard or non-i/o errors on non-raw tape | |
583 | * cause it to close. | |
584 | */ | |
d565635a | 585 | if (sc->sc_openf>0 && bp != &rtmbuf[TMUNIT(bp->b_dev)]) |
71236e46 BJ |
586 | sc->sc_openf = -1; |
587 | /* | |
588 | * Couldn't recover error | |
589 | */ | |
80905075 | 590 | printf("te%d: hard error bn%d er=%b\n", minor(bp->b_dev)&03, |
d565635a | 591 | bp->b_blkno, sc->sc_erreg, TMER_BITS); |
d75e5c3e | 592 | bp->b_flags |= B_ERROR; |
71236e46 | 593 | goto opdone; |
d75e5c3e | 594 | } |
71236e46 BJ |
595 | /* |
596 | * Advance tape control FSM. | |
597 | */ | |
598 | ignoreerr: | |
d75e5c3e BJ |
599 | switch (state) { |
600 | ||
601 | case SIO: | |
71236e46 BJ |
602 | /* |
603 | * Read/write increments tape block number | |
604 | */ | |
7e00c42b | 605 | sc->sc_blkno++; |
71236e46 | 606 | goto opdone; |
d75e5c3e BJ |
607 | |
608 | case SCOM: | |
71236e46 | 609 | /* |
d565635a | 610 | * For forward/backward space record update current position. |
71236e46 | 611 | */ |
d565635a | 612 | if (bp == &ctmbuf[TMUNIT(bp->b_dev)]) |
71236e46 BJ |
613 | switch (bp->b_command) { |
614 | ||
615 | case TM_SFORW: | |
616 | sc->sc_blkno -= bp->b_repcnt; | |
d565635a | 617 | break; |
71236e46 BJ |
618 | |
619 | case TM_SREV: | |
620 | sc->sc_blkno += bp->b_repcnt; | |
d565635a | 621 | break; |
d75e5c3e | 622 | } |
d565635a | 623 | goto opdone; |
d75e5c3e BJ |
624 | |
625 | case SSEEK: | |
7e00c42b | 626 | sc->sc_blkno = dbtofsb(bp->b_blkno); |
71236e46 | 627 | goto opcont; |
d75e5c3e BJ |
628 | |
629 | default: | |
71236e46 | 630 | panic("tmintr"); |
d75e5c3e | 631 | } |
71236e46 BJ |
632 | opdone: |
633 | /* | |
634 | * Reset error count and remove | |
635 | * from device queue. | |
636 | */ | |
637 | um->um_tab.b_errcnt = 0; | |
638 | dp->b_actf = bp->av_forw; | |
639 | bp->b_resid = -addr->tmbc; | |
0801d37f | 640 | ubadone(um); |
71236e46 BJ |
641 | iodone(bp); |
642 | /* | |
643 | * Circulate slave to end of controller | |
644 | * queue to give other slaves a chance. | |
645 | */ | |
646 | um->um_tab.b_actf = dp->b_forw; | |
647 | if (dp->b_actf) { | |
648 | dp->b_forw = NULL; | |
649 | if (um->um_tab.b_actf == NULL) | |
650 | um->um_tab.b_actf = dp; | |
651 | else | |
652 | um->um_tab.b_actl->b_forw = dp; | |
653 | um->um_tab.b_actl = dp; | |
654 | } | |
655 | if (um->um_tab.b_actf == 0) | |
656 | return; | |
657 | opcont: | |
658 | tmstart(um); | |
d75e5c3e BJ |
659 | } |
660 | ||
661 | tmseteof(bp) | |
662 | register struct buf *bp; | |
663 | { | |
d565635a | 664 | register int teunit = TEUNIT(bp->b_dev); |
3f3a34c3 | 665 | register struct device *addr = |
d565635a BJ |
666 | (struct device *)tedinfo[teunit]->ui_addr; |
667 | register struct te_softc *sc = &te_softc[teunit]; | |
d75e5c3e | 668 | |
d565635a | 669 | if (bp == &ctmbuf[TMUNIT(bp->b_dev)]) { |
7e00c42b | 670 | if (sc->sc_blkno > dbtofsb(bp->b_blkno)) { |
d75e5c3e | 671 | /* reversing */ |
7e00c42b BJ |
672 | sc->sc_nxrec = dbtofsb(bp->b_blkno) - addr->tmbc; |
673 | sc->sc_blkno = sc->sc_nxrec; | |
d75e5c3e BJ |
674 | } else { |
675 | /* spacing forward */ | |
7e00c42b BJ |
676 | sc->sc_blkno = dbtofsb(bp->b_blkno) + addr->tmbc; |
677 | sc->sc_nxrec = sc->sc_blkno - 1; | |
d75e5c3e BJ |
678 | } |
679 | return; | |
680 | } | |
681 | /* eof on read */ | |
7e00c42b | 682 | sc->sc_nxrec = dbtofsb(bp->b_blkno); |
d75e5c3e BJ |
683 | } |
684 | ||
685 | tmread(dev) | |
71236e46 | 686 | dev_t dev; |
d75e5c3e BJ |
687 | { |
688 | ||
689 | tmphys(dev); | |
89bd2f01 BJ |
690 | if (u.u_error) |
691 | return; | |
71236e46 | 692 | physio(tmstrategy, &rtmbuf[TMUNIT(dev)], dev, B_READ, minphys); |
d75e5c3e BJ |
693 | } |
694 | ||
695 | tmwrite(dev) | |
71236e46 | 696 | dev_t dev; |
d75e5c3e BJ |
697 | { |
698 | ||
699 | tmphys(dev); | |
89bd2f01 BJ |
700 | if (u.u_error) |
701 | return; | |
71236e46 | 702 | physio(tmstrategy, &rtmbuf[TMUNIT(dev)], dev, B_WRITE, minphys); |
d75e5c3e BJ |
703 | } |
704 | ||
d565635a BJ |
705 | /* |
706 | * Check that a raw device exists. | |
707 | * If it does, set up sc_blkno and sc_nxrec | |
708 | * so that the tape will appear positioned correctly. | |
709 | */ | |
d75e5c3e | 710 | tmphys(dev) |
71236e46 | 711 | dev_t dev; |
d75e5c3e | 712 | { |
d565635a | 713 | register int teunit = TEUNIT(dev); |
d75e5c3e | 714 | register daddr_t a; |
d565635a BJ |
715 | register struct te_softc *sc; |
716 | register struct uba_device *ui; | |
d75e5c3e | 717 | |
d565635a | 718 | if (teunit >= NTE || (ui=tedinfo[teunit]) == 0 || ui->ui_alive == 0) { |
89bd2f01 BJ |
719 | u.u_error = ENXIO; |
720 | return; | |
721 | } | |
d565635a | 722 | sc = &te_softc[teunit]; |
d75e5c3e | 723 | a = dbtofsb(u.u_offset >> 9); |
7e00c42b BJ |
724 | sc->sc_blkno = a; |
725 | sc->sc_nxrec = a + 1; | |
d75e5c3e BJ |
726 | } |
727 | ||
71236e46 BJ |
728 | tmreset(uban) |
729 | int uban; | |
730 | { | |
89bd2f01 | 731 | register struct uba_ctlr *um; |
d565635a | 732 | register tm11, teunit; |
89bd2f01 | 733 | register struct uba_device *ui; |
71236e46 BJ |
734 | register struct buf *dp; |
735 | ||
afb907f2 BJ |
736 | for (tm11 = 0; tm11 < NTM; tm11++) { |
737 | if ((um = tmminfo[tm11]) == 0 || um->um_alive == 0 || | |
71236e46 BJ |
738 | um->um_ubanum != uban) |
739 | continue; | |
80905075 | 740 | printf(" tm%d", tm11); |
71236e46 BJ |
741 | um->um_tab.b_active = 0; |
742 | um->um_tab.b_actf = um->um_tab.b_actl = 0; | |
743 | if (um->um_ubinfo) { | |
744 | printf("<%d>", (um->um_ubinfo>>28)&0xf); | |
0801d37f | 745 | ubadone(um); |
71236e46 BJ |
746 | } |
747 | ((struct device *)(um->um_addr))->tmcs = TM_DCLR; | |
d565635a BJ |
748 | for (teunit = 0; teunit < NTE; teunit++) { |
749 | if ((ui = tedinfo[teunit]) == 0 || ui->ui_mi != um || | |
750 | ui->ui_alive == 0) | |
71236e46 | 751 | continue; |
d565635a | 752 | dp = &teutab[teunit]; |
71236e46 BJ |
753 | dp->b_active = 0; |
754 | dp->b_forw = 0; | |
755 | if (um->um_tab.b_actf == NULL) | |
756 | um->um_tab.b_actf = dp; | |
757 | else | |
758 | um->um_tab.b_actl->b_forw = dp; | |
759 | um->um_tab.b_actl = dp; | |
d565635a | 760 | te_softc[teunit].sc_openf = -1; |
71236e46 BJ |
761 | } |
762 | tmstart(um); | |
763 | } | |
764 | } | |
765 | ||
d75e5c3e BJ |
766 | /*ARGSUSED*/ |
767 | tmioctl(dev, cmd, addr, flag) | |
768 | caddr_t addr; | |
769 | dev_t dev; | |
770 | { | |
d565635a BJ |
771 | int teunit = TEUNIT(dev); |
772 | register struct te_softc *sc = &te_softc[teunit]; | |
773 | register struct buf *bp = &ctmbuf[TMUNIT(dev)]; | |
d75e5c3e BJ |
774 | register callcount; |
775 | int fcount; | |
776 | struct mtop mtop; | |
777 | struct mtget mtget; | |
778 | /* we depend of the values and order of the MT codes here */ | |
71236e46 BJ |
779 | static tmops[] = |
780 | {TM_WEOF,TM_SFORW,TM_SREV,TM_SFORW,TM_SREV,TM_REW,TM_OFFL,TM_SENSE}; | |
d75e5c3e | 781 | |
71236e46 | 782 | switch (cmd) { |
d75e5c3e BJ |
783 | case MTIOCTOP: /* tape operation */ |
784 | if (copyin((caddr_t)addr, (caddr_t)&mtop, sizeof(mtop))) { | |
785 | u.u_error = EFAULT; | |
786 | return; | |
787 | } | |
788 | switch(mtop.mt_op) { | |
71236e46 BJ |
789 | case MTWEOF: |
790 | callcount = mtop.mt_count; | |
791 | fcount = 1; | |
792 | break; | |
793 | case MTFSF: case MTBSF: | |
d75e5c3e BJ |
794 | callcount = mtop.mt_count; |
795 | fcount = INF; | |
796 | break; | |
797 | case MTFSR: case MTBSR: | |
798 | callcount = 1; | |
799 | fcount = mtop.mt_count; | |
800 | break; | |
77115c00 | 801 | case MTREW: case MTOFFL: case MTNOP: |
d75e5c3e BJ |
802 | callcount = 1; |
803 | fcount = 1; | |
804 | break; | |
805 | default: | |
806 | u.u_error = ENXIO; | |
807 | return; | |
808 | } | |
71236e46 | 809 | if (callcount <= 0 || fcount <= 0) { |
d75e5c3e | 810 | u.u_error = ENXIO; |
71236e46 BJ |
811 | return; |
812 | } | |
813 | while (--callcount >= 0) { | |
e4271c68 | 814 | tmcommand(dev, tmops[mtop.mt_op], fcount); |
d75e5c3e | 815 | if ((mtop.mt_op == MTFSR || mtop.mt_op == MTBSR) && |
71236e46 | 816 | bp->b_resid) { |
d75e5c3e BJ |
817 | u.u_error = EIO; |
818 | break; | |
819 | } | |
d565635a | 820 | if ((bp->b_flags&B_ERROR) || sc->sc_erreg&TMER_BOT) |
d75e5c3e BJ |
821 | break; |
822 | } | |
71236e46 | 823 | geterror(bp); |
d75e5c3e BJ |
824 | return; |
825 | case MTIOCGET: | |
7e00c42b BJ |
826 | mtget.mt_dsreg = sc->sc_dsreg; |
827 | mtget.mt_erreg = sc->sc_erreg; | |
828 | mtget.mt_resid = sc->sc_resid; | |
d75e5c3e BJ |
829 | if (copyout((caddr_t)&mtget, addr, sizeof(mtget))) |
830 | u.u_error = EFAULT; | |
831 | return; | |
832 | default: | |
833 | u.u_error = ENXIO; | |
834 | } | |
835 | } | |
836 | ||
837 | #define DBSIZE 20 | |
838 | ||
7455bf3e | 839 | tmdump() |
d75e5c3e | 840 | { |
89bd2f01 | 841 | register struct uba_device *ui; |
3f3a34c3 BJ |
842 | register struct uba_regs *up; |
843 | register struct device *addr; | |
5aa9d5ea RE |
844 | int blk, num; |
845 | int start; | |
d75e5c3e | 846 | |
5aa9d5ea RE |
847 | start = 0; |
848 | num = maxfree; | |
849 | #define phys(a,b) ((b)((int)(a)&0x7fffffff)) | |
d565635a | 850 | if (tedinfo[0] == 0) |
2536c16c | 851 | return (ENXIO); |
d565635a | 852 | ui = phys(tedinfo[0], struct uba_device *); |
3f3a34c3 BJ |
853 | up = phys(ui->ui_hd, struct uba_hd *)->uh_physuba; |
854 | #if VAX780 | |
855 | if (cpu == VAX_780) | |
856 | ubainit(up); | |
d75e5c3e | 857 | #endif |
77115c00 | 858 | DELAY(1000000); |
3f3a34c3 BJ |
859 | addr = (struct device *)ui->ui_physaddr; |
860 | tmwait(addr); | |
71236e46 | 861 | addr->tmcs = TM_DCLR | TM_GO; |
d75e5c3e BJ |
862 | while (num > 0) { |
863 | blk = num > DBSIZE ? DBSIZE : num; | |
3f3a34c3 | 864 | tmdwrite(start, blk, addr, up); |
d75e5c3e BJ |
865 | start += blk; |
866 | num -= blk; | |
867 | } | |
5aa9d5ea RE |
868 | tmeof(addr); |
869 | tmeof(addr); | |
7e00c42b | 870 | tmwait(addr); |
2536c16c BJ |
871 | if (addr->tmcs&TM_ERR) |
872 | return (EIO); | |
71236e46 | 873 | addr->tmcs = TM_REW | TM_GO; |
5aa9d5ea | 874 | tmwait(addr); |
7455bf3e | 875 | return (0); |
d75e5c3e BJ |
876 | } |
877 | ||
71236e46 BJ |
878 | tmdwrite(dbuf, num, addr, up) |
879 | register dbuf, num; | |
3f3a34c3 BJ |
880 | register struct device *addr; |
881 | struct uba_regs *up; | |
d75e5c3e | 882 | { |
3f3a34c3 BJ |
883 | register struct pte *io; |
884 | register int npf; | |
0a51498e | 885 | |
3f3a34c3 | 886 | tmwait(addr); |
3f3a34c3 | 887 | io = up->uba_map; |
d75e5c3e | 888 | npf = num+1; |
0a51498e | 889 | while (--npf != 0) |
89bd2f01 | 890 | *(int *)io++ = (dbuf++ | (1<<UBAMR_DPSHIFT) | UBAMR_MRV); |
3f3a34c3 BJ |
891 | *(int *)io = 0; |
892 | addr->tmbc = -(num*NBPG); | |
893 | addr->tmba = 0; | |
71236e46 | 894 | addr->tmcs = TM_WCOM | TM_GO; |
d75e5c3e BJ |
895 | } |
896 | ||
3f3a34c3 BJ |
897 | tmwait(addr) |
898 | register struct device *addr; | |
d75e5c3e | 899 | { |
0a51498e | 900 | register s; |
d75e5c3e BJ |
901 | |
902 | do | |
3f3a34c3 | 903 | s = addr->tmcs; |
71236e46 | 904 | while ((s & TM_CUR) == 0); |
d75e5c3e BJ |
905 | } |
906 | ||
3f3a34c3 BJ |
907 | tmeof(addr) |
908 | struct device *addr; | |
d75e5c3e BJ |
909 | { |
910 | ||
3f3a34c3 | 911 | tmwait(addr); |
71236e46 | 912 | addr->tmcs = TM_WEOF | TM_GO; |
d75e5c3e BJ |
913 | } |
914 | #endif |