Commit | Line | Data |
---|---|---|
971424d9 | 1 | /* tm.c 4.29 81/03/11 */ |
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 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 | 188 | register struct te_softc *sc; |
971424d9 | 189 | int olddens, 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 | } | |
971424d9 BJ |
197 | olddens = sc->sc_dens; |
198 | dens = TM_IE | TM_GO | (ui->ui_slave << 8); | |
199 | if ((minor(dev) & T_1600BPI) == 0) | |
200 | dens |= TM_D800; | |
201 | sc->sc_dens = dens; | |
27a897a2 | 202 | get: |
71236e46 | 203 | tmcommand(dev, TM_SENSE, 1); |
27a897a2 BJ |
204 | if (sc->sc_erreg&TMER_SDWN) { |
205 | sleep((caddr_t)&lbolt, PZERO+1); | |
206 | goto get; | |
207 | } | |
971424d9 | 208 | sc->sc_dens = olddens; |
d565635a | 209 | if ((sc->sc_erreg&(TMER_SELR|TMER_TUR)) != (TMER_SELR|TMER_TUR) || |
4fd4cf52 | 210 | (flag&FWRITE) && (sc->sc_erreg&TMER_WRL) || |
d565635a | 211 | (sc->sc_erreg&TMER_BOT) == 0 && (flag&FWRITE) && |
4fd4cf52 | 212 | dens != sc->sc_dens) { |
d565635a BJ |
213 | /* |
214 | * Not online or density switch in mid-tape or write locked. | |
215 | */ | |
71236e46 | 216 | u.u_error = EIO; |
d75e5c3e BJ |
217 | return; |
218 | } | |
71236e46 | 219 | sc->sc_openf = 1; |
7e00c42b BJ |
220 | sc->sc_blkno = (daddr_t)0; |
221 | sc->sc_nxrec = INF; | |
71236e46 | 222 | sc->sc_lastiow = 0; |
d565635a | 223 | sc->sc_dens = dens; |
d75e5c3e BJ |
224 | } |
225 | ||
71236e46 BJ |
226 | /* |
227 | * Close tape device. | |
228 | * | |
229 | * If tape was open for writing or last operation was | |
230 | * a write, then write two EOF's and backspace over the last one. | |
231 | * Unless this is a non-rewinding special file, rewind the tape. | |
232 | * Make the tape available to others. | |
233 | */ | |
d75e5c3e BJ |
234 | tmclose(dev, flag) |
235 | register dev_t dev; | |
236 | register flag; | |
237 | { | |
d565635a | 238 | register struct te_softc *sc = &te_softc[TEUNIT(dev)]; |
d75e5c3e | 239 | |
71236e46 BJ |
240 | if (flag == FWRITE || (flag&FWRITE) && sc->sc_lastiow) { |
241 | tmcommand(dev, TM_WEOF, 1); | |
242 | tmcommand(dev, TM_WEOF, 1); | |
243 | tmcommand(dev, TM_SREV, 1); | |
d75e5c3e BJ |
244 | } |
245 | if ((minor(dev)&T_NOREWIND) == 0) | |
d565635a BJ |
246 | /* |
247 | * 0 count means don't hang waiting for rewind complete | |
248 | * rather ctmbuf stays busy until the operation completes | |
249 | * preventing further opens from completing by | |
250 | * preventing a TM_SENSE from completing. | |
251 | */ | |
252 | tmcommand(dev, TM_REW, 0); | |
7e00c42b | 253 | sc->sc_openf = 0; |
d75e5c3e BJ |
254 | } |
255 | ||
71236e46 BJ |
256 | /* |
257 | * Execute a command on the tape drive | |
258 | * a specified number of times. | |
259 | */ | |
e4271c68 | 260 | tmcommand(dev, com, count) |
d75e5c3e BJ |
261 | dev_t dev; |
262 | int com, count; | |
263 | { | |
264 | register struct buf *bp; | |
265 | ||
71236e46 | 266 | bp = &ctmbuf[TMUNIT(dev)]; |
d75e5c3e BJ |
267 | (void) spl5(); |
268 | while (bp->b_flags&B_BUSY) { | |
d565635a BJ |
269 | /* |
270 | * This special check is because B_BUSY never | |
271 | * gets cleared in the non-waiting rewind case. | |
272 | */ | |
27a897a2 | 273 | if (bp->b_repcnt == 0 && (bp->b_flags&B_DONE)) |
d565635a | 274 | break; |
d75e5c3e BJ |
275 | bp->b_flags |= B_WANTED; |
276 | sleep((caddr_t)bp, PRIBIO); | |
277 | } | |
278 | bp->b_flags = B_BUSY|B_READ; | |
279 | (void) spl0(); | |
280 | bp->b_dev = dev; | |
281 | bp->b_repcnt = -count; | |
282 | bp->b_command = com; | |
283 | bp->b_blkno = 0; | |
284 | tmstrategy(bp); | |
d565635a BJ |
285 | /* |
286 | * In case of rewind from close, don't wait. | |
287 | * This is the only case where count can be 0. | |
288 | */ | |
289 | if (count == 0) | |
290 | return; | |
d75e5c3e BJ |
291 | iowait(bp); |
292 | if (bp->b_flags&B_WANTED) | |
293 | wakeup((caddr_t)bp); | |
294 | bp->b_flags &= B_ERROR; | |
295 | } | |
296 | ||
71236e46 | 297 | /* |
d565635a | 298 | * Queue a tape operation. |
71236e46 | 299 | */ |
d75e5c3e BJ |
300 | tmstrategy(bp) |
301 | register struct buf *bp; | |
302 | { | |
d565635a | 303 | int teunit = TEUNIT(bp->b_dev); |
89bd2f01 | 304 | register struct uba_ctlr *um; |
71236e46 | 305 | register struct buf *dp; |
d75e5c3e | 306 | |
71236e46 BJ |
307 | /* |
308 | * Put transfer at end of unit queue | |
309 | */ | |
d565635a | 310 | dp = &teutab[teunit]; |
d75e5c3e BJ |
311 | bp->av_forw = NULL; |
312 | (void) spl5(); | |
71236e46 BJ |
313 | if (dp->b_actf == NULL) { |
314 | dp->b_actf = bp; | |
315 | /* | |
316 | * Transport not already active... | |
317 | * put at end of controller queue. | |
318 | */ | |
319 | dp->b_forw = NULL; | |
d565635a | 320 | um = tedinfo[teunit]->ui_mi; |
71236e46 BJ |
321 | if (um->um_tab.b_actf == NULL) |
322 | um->um_tab.b_actf = dp; | |
323 | else | |
324 | um->um_tab.b_actl->b_forw = dp; | |
325 | um->um_tab.b_actl = dp; | |
326 | } else | |
327 | dp->b_actl->av_forw = bp; | |
328 | dp->b_actl = bp; | |
329 | /* | |
330 | * If the controller is not busy, get | |
331 | * it going. | |
332 | */ | |
333 | if (um->um_tab.b_active == 0) | |
334 | tmstart(um); | |
d75e5c3e BJ |
335 | (void) spl0(); |
336 | } | |
337 | ||
71236e46 BJ |
338 | /* |
339 | * Start activity on a tm controller. | |
340 | */ | |
341 | tmstart(um) | |
89bd2f01 | 342 | register struct uba_ctlr *um; |
d75e5c3e | 343 | { |
71236e46 BJ |
344 | register struct buf *bp, *dp; |
345 | register struct device *addr = (struct device *)um->um_addr; | |
d565635a | 346 | register struct te_softc *sc; |
89bd2f01 | 347 | register struct uba_device *ui; |
d565635a | 348 | int teunit, cmd; |
7e00c42b | 349 | daddr_t blkno; |
d75e5c3e | 350 | |
71236e46 BJ |
351 | /* |
352 | * Look for an idle transport on the controller. | |
353 | */ | |
d75e5c3e | 354 | loop: |
71236e46 | 355 | if ((dp = um->um_tab.b_actf) == NULL) |
d75e5c3e | 356 | return; |
71236e46 BJ |
357 | if ((bp = dp->b_actf) == NULL) { |
358 | um->um_tab.b_actf = dp->b_forw; | |
359 | goto loop; | |
360 | } | |
d565635a BJ |
361 | teunit = TEUNIT(bp->b_dev); |
362 | ui = tedinfo[teunit]; | |
71236e46 BJ |
363 | /* |
364 | * Record pre-transfer status (e.g. for TM_SENSE) | |
365 | */ | |
d565635a | 366 | sc = &te_softc[teunit]; |
71236e46 BJ |
367 | addr = (struct device *)um->um_addr; |
368 | addr->tmcs = (ui->ui_slave << 8); | |
7e00c42b BJ |
369 | sc->sc_dsreg = addr->tmcs; |
370 | sc->sc_erreg = addr->tmer; | |
371 | sc->sc_resid = addr->tmbc; | |
71236e46 BJ |
372 | /* |
373 | * Default is that last command was NOT a write command; | |
374 | * if we do a write command we will notice this in tmintr(). | |
375 | */ | |
376 | sc->sc_lastiow = 1; | |
377 | if (sc->sc_openf < 0 || (addr->tmcs&TM_CUR) == 0) { | |
378 | /* | |
d565635a BJ |
379 | * Have had a hard error on a non-raw tape |
380 | * or the tape unit is now unavailable | |
381 | * (e.g. taken off line). | |
71236e46 BJ |
382 | */ |
383 | bp->b_flags |= B_ERROR; | |
d75e5c3e BJ |
384 | goto next; |
385 | } | |
d565635a BJ |
386 | if (bp == &ctmbuf[TMUNIT(bp->b_dev)]) { |
387 | /* | |
388 | * Execute control operation with the specified count. | |
389 | */ | |
71236e46 BJ |
390 | if (bp->b_command == TM_SENSE) |
391 | goto next; | |
71236e46 BJ |
392 | um->um_tab.b_active = |
393 | bp->b_command == TM_REW ? SREW : SCOM; | |
394 | if (bp->b_command == TM_SFORW || bp->b_command == TM_SREV) | |
395 | addr->tmbc = bp->b_repcnt; | |
d1330646 | 396 | goto dobpcmd; |
71236e46 | 397 | } |
d565635a BJ |
398 | /* |
399 | * The following checks handle boundary cases for operation | |
400 | * on non-raw tapes. On raw tapes the initialization of | |
401 | * sc->sc_nxrec by tmphys causes them to be skipped normally | |
402 | * (except in the case of retries). | |
403 | */ | |
404 | if (dbtofsb(bp->b_blkno) > sc->sc_nxrec) { | |
405 | /* | |
406 | * Can't read past known end-of-file. | |
407 | */ | |
408 | bp->b_flags |= B_ERROR; | |
409 | bp->b_error = ENXIO; | |
410 | goto next; | |
411 | } | |
412 | if (dbtofsb(bp->b_blkno) == sc->sc_nxrec && | |
413 | bp->b_flags&B_READ) { | |
414 | /* | |
415 | * Reading at end of file returns 0 bytes. | |
416 | */ | |
417 | bp->b_resid = bp->b_bcount; | |
418 | clrbuf(bp); | |
419 | goto next; | |
420 | } | |
421 | if ((bp->b_flags&B_READ) == 0) | |
422 | /* | |
423 | * Writing sets EOF | |
424 | */ | |
425 | sc->sc_nxrec = dbtofsb(bp->b_blkno) + 1; | |
71236e46 BJ |
426 | /* |
427 | * If the data transfer command is in the correct place, | |
428 | * set up all the registers except the csr, and give | |
429 | * control over to the UNIBUS adapter routines, to | |
430 | * wait for resources to start the i/o. | |
431 | */ | |
7e00c42b | 432 | if ((blkno = sc->sc_blkno) == dbtofsb(bp->b_blkno)) { |
3f3a34c3 | 433 | addr->tmbc = -bp->b_bcount; |
d75e5c3e | 434 | if ((bp->b_flags&B_READ) == 0) { |
7e00c42b | 435 | if (um->um_tab.b_errcnt) |
d565635a | 436 | cmd = TM_WIRG; |
d75e5c3e | 437 | else |
d565635a | 438 | cmd = TM_WCOM; |
d75e5c3e | 439 | } else |
d565635a | 440 | cmd = TM_RCOM; |
7e00c42b | 441 | um->um_tab.b_active = SIO; |
d565635a | 442 | um->um_cmd = sc->sc_dens|cmd; |
80905075 | 443 | #ifdef notdef |
d1330646 | 444 | if (tmreverseop(sc->sc_lastcmd)) |
d565635a | 445 | while (addr->tmer & TMER_SDWN) |
d1330646 | 446 | tmgapsdcnt++; |
d1330646 | 447 | sc->sc_lastcmd = TM_RCOM; /* will serve */ |
80905075 | 448 | #endif |
a0eab615 | 449 | (void) ubago(ui); |
d75e5c3e BJ |
450 | return; |
451 | } | |
71236e46 | 452 | /* |
d565635a BJ |
453 | * Tape positioned incorrectly; |
454 | * set to seek forwards or backwards to the correct spot. | |
455 | * This happens for raw tapes only on error retries. | |
71236e46 | 456 | */ |
7e00c42b | 457 | um->um_tab.b_active = SSEEK; |
d75e5c3e | 458 | if (blkno < dbtofsb(bp->b_blkno)) { |
d1330646 | 459 | bp->b_command = TM_SFORW; |
3f3a34c3 | 460 | addr->tmbc = blkno - dbtofsb(bp->b_blkno); |
d75e5c3e | 461 | } else { |
d1330646 | 462 | bp->b_command = TM_SREV; |
3f3a34c3 | 463 | addr->tmbc = dbtofsb(bp->b_blkno) - blkno; |
d75e5c3e | 464 | } |
d1330646 | 465 | dobpcmd: |
80905075 | 466 | #ifdef notdef |
d565635a BJ |
467 | /* |
468 | * It is strictly necessary to wait for the tape | |
469 | * to stop before changing directions, but the TC11 | |
470 | * handles this for us. | |
471 | */ | |
d1330646 BJ |
472 | if (tmreverseop(sc->sc_lastcmd) != tmreverseop(bp->b_command)) |
473 | while (addr->tmer & TM_SDWN) | |
474 | tmgapsdcnt++; | |
d1330646 | 475 | sc->sc_lastcmd = bp->b_command; |
80905075 | 476 | #endif |
d565635a BJ |
477 | /* |
478 | * Do the command in bp. | |
479 | */ | |
480 | addr->tmcs = (sc->sc_dens | bp->b_command); | |
d75e5c3e BJ |
481 | return; |
482 | ||
483 | next: | |
71236e46 BJ |
484 | /* |
485 | * Done with this operation due to error or | |
486 | * the fact that it doesn't do anything. | |
487 | * Release UBA resources (if any), dequeue | |
488 | * the transfer and continue processing this slave. | |
489 | */ | |
490 | if (um->um_ubinfo) | |
0801d37f | 491 | ubadone(um); |
71236e46 BJ |
492 | um->um_tab.b_errcnt = 0; |
493 | dp->b_actf = bp->av_forw; | |
d75e5c3e BJ |
494 | iodone(bp); |
495 | goto loop; | |
496 | } | |
497 | ||
71236e46 BJ |
498 | /* |
499 | * The UNIBUS resources we needed have been | |
500 | * allocated to us; start the device. | |
501 | */ | |
e4271c68 | 502 | tmdgo(um) |
89bd2f01 | 503 | register struct uba_ctlr *um; |
3f3a34c3 | 504 | { |
e4271c68 | 505 | register struct device *addr = (struct device *)um->um_addr; |
7e00c42b | 506 | |
e4271c68 BJ |
507 | addr->tmba = um->um_ubinfo; |
508 | addr->tmcs = um->um_cmd | ((um->um_ubinfo >> 12) & 0x30); | |
3f3a34c3 BJ |
509 | } |
510 | ||
71236e46 BJ |
511 | /* |
512 | * Tm interrupt routine. | |
513 | */ | |
7e00c42b | 514 | /*ARGSUSED*/ |
afb907f2 BJ |
515 | tmintr(tm11) |
516 | int tm11; | |
d75e5c3e | 517 | { |
71236e46 | 518 | struct buf *dp; |
d75e5c3e | 519 | register struct buf *bp; |
89bd2f01 | 520 | register struct uba_ctlr *um = tmminfo[tm11]; |
d565635a BJ |
521 | register struct device *addr; |
522 | register struct te_softc *sc; | |
523 | int teunit; | |
d75e5c3e BJ |
524 | register state; |
525 | ||
d565635a BJ |
526 | if ((dp = um->um_tab.b_actf) == NULL) |
527 | return; | |
528 | bp = dp->b_actf; | |
529 | teunit = TEUNIT(bp->b_dev); | |
530 | addr = (struct device *)tedinfo[teunit]->ui_addr; | |
71236e46 BJ |
531 | /* |
532 | * If last command was a rewind, and tape is still | |
533 | * rewinding, wait for the rewind complete interrupt. | |
534 | */ | |
535 | if (um->um_tab.b_active == SREW) { | |
536 | um->um_tab.b_active = SCOM; | |
d565635a | 537 | if (addr->tmer&TMER_RWS) |
71236e46 | 538 | return; |
d75e5c3e | 539 | } |
71236e46 BJ |
540 | /* |
541 | * An operation completed... record status | |
542 | */ | |
d565635a | 543 | sc = &te_softc[teunit]; |
7e00c42b BJ |
544 | sc->sc_dsreg = addr->tmcs; |
545 | sc->sc_erreg = addr->tmer; | |
546 | sc->sc_resid = addr->tmbc; | |
d75e5c3e | 547 | if ((bp->b_flags & B_READ) == 0) |
71236e46 | 548 | sc->sc_lastiow = 1; |
7e00c42b BJ |
549 | state = um->um_tab.b_active; |
550 | um->um_tab.b_active = 0; | |
71236e46 BJ |
551 | /* |
552 | * Check for errors. | |
553 | */ | |
554 | if (addr->tmcs&TM_ERR) { | |
d565635a | 555 | while (addr->tmer & TMER_SDWN) |
d75e5c3e | 556 | ; /* await settle down */ |
71236e46 | 557 | /* |
d565635a | 558 | * If we hit the end of the tape file, update our position. |
71236e46 | 559 | */ |
d565635a | 560 | if (addr->tmer&TMER_EOF) { |
71236e46 BJ |
561 | tmseteof(bp); /* set blkno and nxrec */ |
562 | state = SCOM; /* force completion */ | |
563 | /* | |
564 | * Stuff bc so it will be unstuffed correctly | |
565 | * later to get resid. | |
566 | */ | |
3f3a34c3 | 567 | addr->tmbc = -bp->b_bcount; |
71236e46 | 568 | goto opdone; |
d75e5c3e | 569 | } |
71236e46 | 570 | /* |
d565635a BJ |
571 | * If we were reading raw tape and the only error was that the |
572 | * record was too long, then we don't consider this an error. | |
71236e46 | 573 | */ |
d565635a BJ |
574 | if (bp == &rtmbuf[TMUNIT(bp->b_dev)] && (bp->b_flags&B_READ) && |
575 | (addr->tmer&(TMER_HARD|TMER_SOFT)) == TMER_RLE) | |
71236e46 BJ |
576 | goto ignoreerr; |
577 | /* | |
578 | * If error is not hard, and this was an i/o operation | |
579 | * retry up to 8 times. | |
580 | */ | |
d565635a | 581 | if ((addr->tmer&TMER_HARD)==0 && state==SIO) { |
7e00c42b | 582 | if (++um->um_tab.b_errcnt < 7) { |
7e00c42b | 583 | sc->sc_blkno++; |
0801d37f | 584 | ubadone(um); |
71236e46 | 585 | goto opcont; |
d75e5c3e | 586 | } |
71236e46 BJ |
587 | } else |
588 | /* | |
589 | * Hard or non-i/o errors on non-raw tape | |
590 | * cause it to close. | |
591 | */ | |
d565635a | 592 | if (sc->sc_openf>0 && bp != &rtmbuf[TMUNIT(bp->b_dev)]) |
71236e46 BJ |
593 | sc->sc_openf = -1; |
594 | /* | |
595 | * Couldn't recover error | |
596 | */ | |
80905075 | 597 | printf("te%d: hard error bn%d er=%b\n", minor(bp->b_dev)&03, |
d565635a | 598 | bp->b_blkno, sc->sc_erreg, TMER_BITS); |
d75e5c3e | 599 | bp->b_flags |= B_ERROR; |
71236e46 | 600 | goto opdone; |
d75e5c3e | 601 | } |
71236e46 BJ |
602 | /* |
603 | * Advance tape control FSM. | |
604 | */ | |
605 | ignoreerr: | |
d75e5c3e BJ |
606 | switch (state) { |
607 | ||
608 | case SIO: | |
71236e46 BJ |
609 | /* |
610 | * Read/write increments tape block number | |
611 | */ | |
7e00c42b | 612 | sc->sc_blkno++; |
71236e46 | 613 | goto opdone; |
d75e5c3e BJ |
614 | |
615 | case SCOM: | |
71236e46 | 616 | /* |
d565635a | 617 | * For forward/backward space record update current position. |
71236e46 | 618 | */ |
d565635a | 619 | if (bp == &ctmbuf[TMUNIT(bp->b_dev)]) |
71236e46 BJ |
620 | switch (bp->b_command) { |
621 | ||
622 | case TM_SFORW: | |
623 | sc->sc_blkno -= bp->b_repcnt; | |
d565635a | 624 | break; |
71236e46 BJ |
625 | |
626 | case TM_SREV: | |
627 | sc->sc_blkno += bp->b_repcnt; | |
d565635a | 628 | break; |
d75e5c3e | 629 | } |
d565635a | 630 | goto opdone; |
d75e5c3e BJ |
631 | |
632 | case SSEEK: | |
7e00c42b | 633 | sc->sc_blkno = dbtofsb(bp->b_blkno); |
71236e46 | 634 | goto opcont; |
d75e5c3e BJ |
635 | |
636 | default: | |
71236e46 | 637 | panic("tmintr"); |
d75e5c3e | 638 | } |
71236e46 BJ |
639 | opdone: |
640 | /* | |
641 | * Reset error count and remove | |
642 | * from device queue. | |
643 | */ | |
644 | um->um_tab.b_errcnt = 0; | |
645 | dp->b_actf = bp->av_forw; | |
646 | bp->b_resid = -addr->tmbc; | |
0801d37f | 647 | ubadone(um); |
71236e46 BJ |
648 | iodone(bp); |
649 | /* | |
650 | * Circulate slave to end of controller | |
651 | * queue to give other slaves a chance. | |
652 | */ | |
653 | um->um_tab.b_actf = dp->b_forw; | |
654 | if (dp->b_actf) { | |
655 | dp->b_forw = NULL; | |
656 | if (um->um_tab.b_actf == NULL) | |
657 | um->um_tab.b_actf = dp; | |
658 | else | |
659 | um->um_tab.b_actl->b_forw = dp; | |
660 | um->um_tab.b_actl = dp; | |
661 | } | |
662 | if (um->um_tab.b_actf == 0) | |
663 | return; | |
664 | opcont: | |
665 | tmstart(um); | |
d75e5c3e BJ |
666 | } |
667 | ||
668 | tmseteof(bp) | |
669 | register struct buf *bp; | |
670 | { | |
d565635a | 671 | register int teunit = TEUNIT(bp->b_dev); |
3f3a34c3 | 672 | register struct device *addr = |
d565635a BJ |
673 | (struct device *)tedinfo[teunit]->ui_addr; |
674 | register struct te_softc *sc = &te_softc[teunit]; | |
d75e5c3e | 675 | |
d565635a | 676 | if (bp == &ctmbuf[TMUNIT(bp->b_dev)]) { |
7e00c42b | 677 | if (sc->sc_blkno > dbtofsb(bp->b_blkno)) { |
d75e5c3e | 678 | /* reversing */ |
7e00c42b BJ |
679 | sc->sc_nxrec = dbtofsb(bp->b_blkno) - addr->tmbc; |
680 | sc->sc_blkno = sc->sc_nxrec; | |
d75e5c3e BJ |
681 | } else { |
682 | /* spacing forward */ | |
7e00c42b BJ |
683 | sc->sc_blkno = dbtofsb(bp->b_blkno) + addr->tmbc; |
684 | sc->sc_nxrec = sc->sc_blkno - 1; | |
d75e5c3e BJ |
685 | } |
686 | return; | |
687 | } | |
688 | /* eof on read */ | |
7e00c42b | 689 | sc->sc_nxrec = dbtofsb(bp->b_blkno); |
d75e5c3e BJ |
690 | } |
691 | ||
692 | tmread(dev) | |
71236e46 | 693 | dev_t dev; |
d75e5c3e BJ |
694 | { |
695 | ||
696 | tmphys(dev); | |
89bd2f01 BJ |
697 | if (u.u_error) |
698 | return; | |
71236e46 | 699 | physio(tmstrategy, &rtmbuf[TMUNIT(dev)], dev, B_READ, minphys); |
d75e5c3e BJ |
700 | } |
701 | ||
702 | tmwrite(dev) | |
71236e46 | 703 | dev_t dev; |
d75e5c3e BJ |
704 | { |
705 | ||
706 | tmphys(dev); | |
89bd2f01 BJ |
707 | if (u.u_error) |
708 | return; | |
71236e46 | 709 | physio(tmstrategy, &rtmbuf[TMUNIT(dev)], dev, B_WRITE, minphys); |
d75e5c3e BJ |
710 | } |
711 | ||
d565635a BJ |
712 | /* |
713 | * Check that a raw device exists. | |
714 | * If it does, set up sc_blkno and sc_nxrec | |
715 | * so that the tape will appear positioned correctly. | |
716 | */ | |
d75e5c3e | 717 | tmphys(dev) |
71236e46 | 718 | dev_t dev; |
d75e5c3e | 719 | { |
d565635a | 720 | register int teunit = TEUNIT(dev); |
d75e5c3e | 721 | register daddr_t a; |
d565635a BJ |
722 | register struct te_softc *sc; |
723 | register struct uba_device *ui; | |
d75e5c3e | 724 | |
d565635a | 725 | if (teunit >= NTE || (ui=tedinfo[teunit]) == 0 || ui->ui_alive == 0) { |
89bd2f01 BJ |
726 | u.u_error = ENXIO; |
727 | return; | |
728 | } | |
d565635a | 729 | sc = &te_softc[teunit]; |
d75e5c3e | 730 | a = dbtofsb(u.u_offset >> 9); |
7e00c42b BJ |
731 | sc->sc_blkno = a; |
732 | sc->sc_nxrec = a + 1; | |
d75e5c3e BJ |
733 | } |
734 | ||
71236e46 BJ |
735 | tmreset(uban) |
736 | int uban; | |
737 | { | |
89bd2f01 | 738 | register struct uba_ctlr *um; |
d565635a | 739 | register tm11, teunit; |
89bd2f01 | 740 | register struct uba_device *ui; |
71236e46 BJ |
741 | register struct buf *dp; |
742 | ||
afb907f2 BJ |
743 | for (tm11 = 0; tm11 < NTM; tm11++) { |
744 | if ((um = tmminfo[tm11]) == 0 || um->um_alive == 0 || | |
71236e46 BJ |
745 | um->um_ubanum != uban) |
746 | continue; | |
80905075 | 747 | printf(" tm%d", tm11); |
71236e46 BJ |
748 | um->um_tab.b_active = 0; |
749 | um->um_tab.b_actf = um->um_tab.b_actl = 0; | |
750 | if (um->um_ubinfo) { | |
751 | printf("<%d>", (um->um_ubinfo>>28)&0xf); | |
0801d37f | 752 | ubadone(um); |
71236e46 BJ |
753 | } |
754 | ((struct device *)(um->um_addr))->tmcs = TM_DCLR; | |
d565635a BJ |
755 | for (teunit = 0; teunit < NTE; teunit++) { |
756 | if ((ui = tedinfo[teunit]) == 0 || ui->ui_mi != um || | |
757 | ui->ui_alive == 0) | |
71236e46 | 758 | continue; |
d565635a | 759 | dp = &teutab[teunit]; |
71236e46 BJ |
760 | dp->b_active = 0; |
761 | dp->b_forw = 0; | |
762 | if (um->um_tab.b_actf == NULL) | |
763 | um->um_tab.b_actf = dp; | |
764 | else | |
765 | um->um_tab.b_actl->b_forw = dp; | |
766 | um->um_tab.b_actl = dp; | |
d565635a | 767 | te_softc[teunit].sc_openf = -1; |
71236e46 BJ |
768 | } |
769 | tmstart(um); | |
770 | } | |
771 | } | |
772 | ||
d75e5c3e BJ |
773 | /*ARGSUSED*/ |
774 | tmioctl(dev, cmd, addr, flag) | |
775 | caddr_t addr; | |
776 | dev_t dev; | |
777 | { | |
d565635a BJ |
778 | int teunit = TEUNIT(dev); |
779 | register struct te_softc *sc = &te_softc[teunit]; | |
780 | register struct buf *bp = &ctmbuf[TMUNIT(dev)]; | |
d75e5c3e BJ |
781 | register callcount; |
782 | int fcount; | |
783 | struct mtop mtop; | |
784 | struct mtget mtget; | |
785 | /* we depend of the values and order of the MT codes here */ | |
71236e46 BJ |
786 | static tmops[] = |
787 | {TM_WEOF,TM_SFORW,TM_SREV,TM_SFORW,TM_SREV,TM_REW,TM_OFFL,TM_SENSE}; | |
d75e5c3e | 788 | |
71236e46 | 789 | switch (cmd) { |
d75e5c3e BJ |
790 | case MTIOCTOP: /* tape operation */ |
791 | if (copyin((caddr_t)addr, (caddr_t)&mtop, sizeof(mtop))) { | |
792 | u.u_error = EFAULT; | |
793 | return; | |
794 | } | |
795 | switch(mtop.mt_op) { | |
71236e46 BJ |
796 | case MTWEOF: |
797 | callcount = mtop.mt_count; | |
798 | fcount = 1; | |
799 | break; | |
800 | case MTFSF: case MTBSF: | |
d75e5c3e BJ |
801 | callcount = mtop.mt_count; |
802 | fcount = INF; | |
803 | break; | |
804 | case MTFSR: case MTBSR: | |
805 | callcount = 1; | |
806 | fcount = mtop.mt_count; | |
807 | break; | |
77115c00 | 808 | case MTREW: case MTOFFL: case MTNOP: |
d75e5c3e BJ |
809 | callcount = 1; |
810 | fcount = 1; | |
811 | break; | |
812 | default: | |
813 | u.u_error = ENXIO; | |
814 | return; | |
815 | } | |
71236e46 | 816 | if (callcount <= 0 || fcount <= 0) { |
d75e5c3e | 817 | u.u_error = ENXIO; |
71236e46 BJ |
818 | return; |
819 | } | |
820 | while (--callcount >= 0) { | |
e4271c68 | 821 | tmcommand(dev, tmops[mtop.mt_op], fcount); |
d75e5c3e | 822 | if ((mtop.mt_op == MTFSR || mtop.mt_op == MTBSR) && |
71236e46 | 823 | bp->b_resid) { |
d75e5c3e BJ |
824 | u.u_error = EIO; |
825 | break; | |
826 | } | |
d565635a | 827 | if ((bp->b_flags&B_ERROR) || sc->sc_erreg&TMER_BOT) |
d75e5c3e BJ |
828 | break; |
829 | } | |
71236e46 | 830 | geterror(bp); |
d75e5c3e BJ |
831 | return; |
832 | case MTIOCGET: | |
7e00c42b BJ |
833 | mtget.mt_dsreg = sc->sc_dsreg; |
834 | mtget.mt_erreg = sc->sc_erreg; | |
835 | mtget.mt_resid = sc->sc_resid; | |
d75e5c3e BJ |
836 | if (copyout((caddr_t)&mtget, addr, sizeof(mtget))) |
837 | u.u_error = EFAULT; | |
838 | return; | |
839 | default: | |
840 | u.u_error = ENXIO; | |
841 | } | |
842 | } | |
843 | ||
844 | #define DBSIZE 20 | |
845 | ||
7455bf3e | 846 | tmdump() |
d75e5c3e | 847 | { |
89bd2f01 | 848 | register struct uba_device *ui; |
3f3a34c3 BJ |
849 | register struct uba_regs *up; |
850 | register struct device *addr; | |
5aa9d5ea RE |
851 | int blk, num; |
852 | int start; | |
d75e5c3e | 853 | |
5aa9d5ea RE |
854 | start = 0; |
855 | num = maxfree; | |
856 | #define phys(a,b) ((b)((int)(a)&0x7fffffff)) | |
d565635a | 857 | if (tedinfo[0] == 0) |
2536c16c | 858 | return (ENXIO); |
d565635a | 859 | ui = phys(tedinfo[0], struct uba_device *); |
3f3a34c3 BJ |
860 | up = phys(ui->ui_hd, struct uba_hd *)->uh_physuba; |
861 | #if VAX780 | |
862 | if (cpu == VAX_780) | |
863 | ubainit(up); | |
d75e5c3e | 864 | #endif |
77115c00 | 865 | DELAY(1000000); |
3f3a34c3 BJ |
866 | addr = (struct device *)ui->ui_physaddr; |
867 | tmwait(addr); | |
71236e46 | 868 | addr->tmcs = TM_DCLR | TM_GO; |
d75e5c3e BJ |
869 | while (num > 0) { |
870 | blk = num > DBSIZE ? DBSIZE : num; | |
3f3a34c3 | 871 | tmdwrite(start, blk, addr, up); |
d75e5c3e BJ |
872 | start += blk; |
873 | num -= blk; | |
874 | } | |
5aa9d5ea RE |
875 | tmeof(addr); |
876 | tmeof(addr); | |
7e00c42b | 877 | tmwait(addr); |
2536c16c BJ |
878 | if (addr->tmcs&TM_ERR) |
879 | return (EIO); | |
71236e46 | 880 | addr->tmcs = TM_REW | TM_GO; |
5aa9d5ea | 881 | tmwait(addr); |
7455bf3e | 882 | return (0); |
d75e5c3e BJ |
883 | } |
884 | ||
71236e46 BJ |
885 | tmdwrite(dbuf, num, addr, up) |
886 | register dbuf, num; | |
3f3a34c3 BJ |
887 | register struct device *addr; |
888 | struct uba_regs *up; | |
d75e5c3e | 889 | { |
3f3a34c3 BJ |
890 | register struct pte *io; |
891 | register int npf; | |
0a51498e | 892 | |
3f3a34c3 | 893 | tmwait(addr); |
3f3a34c3 | 894 | io = up->uba_map; |
d75e5c3e | 895 | npf = num+1; |
0a51498e | 896 | while (--npf != 0) |
89bd2f01 | 897 | *(int *)io++ = (dbuf++ | (1<<UBAMR_DPSHIFT) | UBAMR_MRV); |
3f3a34c3 BJ |
898 | *(int *)io = 0; |
899 | addr->tmbc = -(num*NBPG); | |
900 | addr->tmba = 0; | |
71236e46 | 901 | addr->tmcs = TM_WCOM | TM_GO; |
d75e5c3e BJ |
902 | } |
903 | ||
3f3a34c3 BJ |
904 | tmwait(addr) |
905 | register struct device *addr; | |
d75e5c3e | 906 | { |
0a51498e | 907 | register s; |
d75e5c3e BJ |
908 | |
909 | do | |
3f3a34c3 | 910 | s = addr->tmcs; |
71236e46 | 911 | while ((s & TM_CUR) == 0); |
d75e5c3e BJ |
912 | } |
913 | ||
3f3a34c3 BJ |
914 | tmeof(addr) |
915 | struct device *addr; | |
d75e5c3e BJ |
916 | { |
917 | ||
3f3a34c3 | 918 | tmwait(addr); |
71236e46 | 919 | addr->tmcs = TM_WEOF | TM_GO; |
d75e5c3e BJ |
920 | } |
921 | #endif |