Commit | Line | Data |
---|---|---|
04b2deaa | 1 | /* tm.c 4.48 82/05/27 */ |
d75e5c3e | 2 | |
443c8066 | 3 | #include "te.h" |
23e0e9b8 | 4 | #include "ts.h" |
2ac8d080 | 5 | #if NTE > 0 |
d75e5c3e | 6 | /* |
afb907f2 | 7 | * TM11/TE10 tape driver |
7e00c42b | 8 | * |
d565635a BJ |
9 | * TODO: |
10 | * test driver with more than one slave | |
11 | * test driver with more than one controller | |
12 | * test reset code | |
d565635a BJ |
13 | * what happens if you offline tape during rewind? |
14 | * test using file system on tape | |
d75e5c3e | 15 | */ |
d75e5c3e | 16 | #include "../h/param.h" |
27a897a2 | 17 | #include "../h/systm.h" |
d75e5c3e BJ |
18 | #include "../h/buf.h" |
19 | #include "../h/dir.h" | |
20 | #include "../h/conf.h" | |
21 | #include "../h/user.h" | |
22 | #include "../h/file.h" | |
23 | #include "../h/map.h" | |
24 | #include "../h/pte.h" | |
e4271c68 | 25 | #include "../h/vm.h" |
89bd2f01 BJ |
26 | #include "../h/ubareg.h" |
27 | #include "../h/ubavar.h" | |
d75e5c3e BJ |
28 | #include "../h/mtio.h" |
29 | #include "../h/ioctl.h" | |
7455bf3e | 30 | #include "../h/cmap.h" |
3f3a34c3 | 31 | #include "../h/cpu.h" |
d75e5c3e | 32 | |
3f3a34c3 | 33 | #include "../h/tmreg.h" |
d75e5c3e | 34 | |
d565635a BJ |
35 | /* |
36 | * There is a ctmbuf per tape controller. | |
37 | * It is used as the token to pass to the internal routines | |
38 | * to execute tape ioctls, and also acts as a lock on the slaves | |
39 | * on the controller, since there is only one per controller. | |
40 | * In particular, when the tape is rewinding on close we release | |
41 | * the user process but any further attempts to use the tape drive | |
42 | * before the rewind completes will hang waiting for ctmbuf. | |
43 | */ | |
44 | struct buf ctmbuf[NTM]; | |
45 | ||
46 | /* | |
47 | * Raw tape operations use rtmbuf. The driver | |
48 | * notices when rtmbuf is being used and allows the user | |
49 | * program to continue after errors and read records | |
50 | * not of the standard length (BSIZE). | |
51 | */ | |
52 | struct buf rtmbuf[NTM]; | |
d75e5c3e | 53 | |
d565635a BJ |
54 | /* |
55 | * Driver unibus interface routines and variables. | |
56 | */ | |
71236e46 | 57 | int tmprobe(), tmslave(), tmattach(), tmdgo(), tmintr(); |
89bd2f01 | 58 | struct uba_ctlr *tmminfo[NTM]; |
d565635a BJ |
59 | struct uba_device *tedinfo[NTE]; |
60 | struct buf teutab[NTE]; | |
61 | short tetotm[NTE]; | |
d763a2b7 | 62 | u_short tmstd[] = { 0772520, 0 }; |
3f3a34c3 | 63 | struct uba_driver tmdriver = |
d565635a | 64 | { tmprobe, tmslave, tmattach, tmdgo, tmstd, "te", tedinfo, "tm", tmminfo, 0 }; |
d75e5c3e BJ |
65 | |
66 | /* bits in minor device */ | |
d565635a BJ |
67 | #define TEUNIT(dev) (minor(dev)&03) |
68 | #define TMUNIT(dev) (tetotm[TEUNIT(dev)]) | |
d75e5c3e BJ |
69 | #define T_NOREWIND 04 |
70 | #define T_1600BPI 08 | |
71 | ||
72 | #define INF (daddr_t)1000000L | |
73 | ||
71236e46 BJ |
74 | /* |
75 | * Software state per tape transport. | |
d565635a BJ |
76 | * |
77 | * 1. A tape drive is a unique-open device; we refuse opens when it is already. | |
78 | * 2. We keep track of the current position on a block tape and seek | |
79 | * before operations by forward/back spacing if necessary. | |
80 | * 3. We remember if the last operation was a write on a tape, so if a tape | |
81 | * is open read write and the last thing done is a write we can | |
82 | * write a standard end of tape mark (two eofs). | |
83 | * 4. We remember the status registers after the last command, using | |
84 | * then internally and returning them to the SENSE ioctl. | |
85 | * 5. We remember the last density the tape was used at. If it is | |
86 | * not a BOT when we start using it and we are writing, we don't | |
87 | * let the density be changed. | |
71236e46 | 88 | */ |
d565635a | 89 | struct te_softc { |
71236e46 BJ |
90 | char sc_openf; /* lock against multiple opens */ |
91 | char sc_lastiow; /* last op was a write */ | |
92 | daddr_t sc_blkno; /* block number, for block device tape */ | |
d565635a | 93 | daddr_t sc_nxrec; /* position of end of tape, if known */ |
71236e46 BJ |
94 | u_short sc_erreg; /* copy of last erreg */ |
95 | u_short sc_dsreg; /* copy of last dsreg */ | |
96 | short sc_resid; /* copy of last bc */ | |
a0eab615 | 97 | #ifdef unneeded |
d1330646 | 98 | short sc_lastcmd; /* last command to handle direction changes */ |
80905075 | 99 | #endif |
d565635a | 100 | u_short sc_dens; /* prototype command with density info */ |
a752fee0 BJ |
101 | daddr_t sc_timo; /* time until timeout expires */ |
102 | short sc_tact; /* timeout is active */ | |
04b2deaa | 103 | } te_softc[NTE]; |
a0eab615 BJ |
104 | #ifdef unneeded |
105 | int tmgapsdcnt; /* DEBUG */ | |
106 | #endif | |
d75e5c3e | 107 | |
71236e46 | 108 | /* |
d565635a BJ |
109 | * States for um->um_tab.b_active, the per controller state flag. |
110 | * This is used to sequence control in the driver. | |
71236e46 | 111 | */ |
d75e5c3e BJ |
112 | #define SSEEK 1 /* seeking */ |
113 | #define SIO 2 /* doing seq i/o */ | |
114 | #define SCOM 3 /* sending control command */ | |
71236e46 | 115 | #define SREW 4 /* sending a drive rewind */ |
d75e5c3e | 116 | |
5aa9d5ea RE |
117 | /* |
118 | * Determine if there is a controller for | |
119 | * a tm at address reg. Our goal is to make the | |
120 | * device interrupt. | |
5aa9d5ea | 121 | */ |
71236e46 | 122 | tmprobe(reg) |
3f3a34c3 BJ |
123 | caddr_t reg; |
124 | { | |
d565635a | 125 | register int br, cvec; /* must be r11,r10; value-result */ |
5aa9d5ea | 126 | |
71236e46 | 127 | #ifdef lint |
a0eab615 | 128 | br = 0; cvec = br; br = cvec; |
89b8a44c | 129 | tmintr(0); |
71236e46 | 130 | #endif |
a870f835 | 131 | ((struct tmdevice *)reg)->tmcs = TM_IE; |
3f3a34c3 | 132 | /* |
afb907f2 | 133 | * If this is a tm11, it ought to have interrupted |
3f3a34c3 | 134 | * by now, if it isn't (ie: it is a ts04) then we just |
d763a2b7 BJ |
135 | * hope that it didn't interrupt, so autoconf will ignore it. |
136 | * Just in case, we will reference one | |
3f3a34c3 | 137 | * of the more distant registers, and hope for a machine |
d763a2b7 | 138 | * check, or similar disaster if this is a ts. |
7e00c42b BJ |
139 | * |
140 | * Note: on an 11/780, badaddr will just generate | |
141 | * a uba error for a ts; but our caller will notice that | |
142 | * so we won't check for it. | |
3f3a34c3 | 143 | */ |
a870f835 | 144 | if (badaddr((caddr_t)&((struct tmdevice *)reg)->tmrd, 2)) |
d763a2b7 BJ |
145 | return (0); |
146 | return (1); | |
3f3a34c3 BJ |
147 | } |
148 | ||
71236e46 BJ |
149 | /* |
150 | * Due to a design flaw, we cannot ascertain if the tape | |
151 | * exists or not unless it is on line - ie: unless a tape is | |
152 | * mounted. This is too servere a restriction to bear, | |
153 | * so all units are assumed to exist. | |
154 | */ | |
155 | /*ARGSUSED*/ | |
e4271c68 | 156 | tmslave(ui, reg) |
89bd2f01 | 157 | struct uba_device *ui; |
3f3a34c3 BJ |
158 | caddr_t reg; |
159 | { | |
d763a2b7 | 160 | |
d763a2b7 | 161 | return (1); |
3f3a34c3 BJ |
162 | } |
163 | ||
71236e46 | 164 | /* |
d565635a | 165 | * Record attachment of the unit to the controller. |
71236e46 BJ |
166 | */ |
167 | /*ARGSUSED*/ | |
168 | tmattach(ui) | |
89bd2f01 | 169 | struct uba_device *ui; |
71236e46 | 170 | { |
d565635a BJ |
171 | /* |
172 | * Tetotm is used in TMUNIT to index the ctmbuf and rtmbuf | |
173 | * arrays given a te unit number. | |
174 | */ | |
175 | tetotm[ui->ui_unit] = ui->ui_mi->um_ctlr; | |
71236e46 BJ |
176 | } |
177 | ||
a752fee0 | 178 | int tmtimer(); |
71236e46 BJ |
179 | /* |
180 | * Open the device. Tapes are unique open | |
181 | * devices, so we refuse if it is already open. | |
182 | * We also check that a tape is available, and | |
d565635a BJ |
183 | * don't block waiting here; if you want to wait |
184 | * for a tape you should timeout in user code. | |
71236e46 | 185 | */ |
d75e5c3e BJ |
186 | tmopen(dev, flag) |
187 | dev_t dev; | |
188 | int flag; | |
189 | { | |
d565635a | 190 | register int teunit; |
89bd2f01 | 191 | register struct uba_device *ui; |
d565635a | 192 | register struct te_softc *sc; |
971424d9 | 193 | int olddens, dens; |
2311123d | 194 | int s; |
d75e5c3e | 195 | |
d565635a BJ |
196 | teunit = TEUNIT(dev); |
197 | if (teunit>=NTE || (sc = &te_softc[teunit])->sc_openf || | |
198 | (ui = tedinfo[teunit]) == 0 || ui->ui_alive == 0) { | |
71236e46 | 199 | u.u_error = ENXIO; |
d75e5c3e BJ |
200 | return; |
201 | } | |
971424d9 BJ |
202 | olddens = sc->sc_dens; |
203 | dens = TM_IE | TM_GO | (ui->ui_slave << 8); | |
204 | if ((minor(dev) & T_1600BPI) == 0) | |
205 | dens |= TM_D800; | |
206 | sc->sc_dens = dens; | |
27a897a2 | 207 | get: |
71236e46 | 208 | tmcommand(dev, TM_SENSE, 1); |
27a897a2 BJ |
209 | if (sc->sc_erreg&TMER_SDWN) { |
210 | sleep((caddr_t)&lbolt, PZERO+1); | |
211 | goto get; | |
212 | } | |
971424d9 | 213 | sc->sc_dens = olddens; |
a1706887 BJ |
214 | if ((sc->sc_erreg&(TMER_SELR|TMER_TUR)) != (TMER_SELR|TMER_TUR)) { |
215 | uprintf("te%d: not online\n", teunit); | |
216 | u.u_error = EIO; | |
217 | return; | |
218 | } | |
219 | if ((flag&FWRITE) && (sc->sc_erreg&TMER_WRL)) { | |
220 | uprintf("te%d: no write ring\n", teunit); | |
221 | u.u_error = EIO; | |
222 | return; | |
223 | } | |
224 | if ((sc->sc_erreg&TMER_BOT) == 0 && (flag&FWRITE) && | |
225 | dens != sc->sc_dens) { | |
226 | uprintf("te%d: can't change density in mid-tape\n", teunit); | |
71236e46 | 227 | u.u_error = EIO; |
d75e5c3e BJ |
228 | return; |
229 | } | |
71236e46 | 230 | sc->sc_openf = 1; |
7e00c42b BJ |
231 | sc->sc_blkno = (daddr_t)0; |
232 | sc->sc_nxrec = INF; | |
71236e46 | 233 | sc->sc_lastiow = 0; |
d565635a | 234 | sc->sc_dens = dens; |
2311123d | 235 | s = spl6(); |
a752fee0 BJ |
236 | if (sc->sc_tact == 0) { |
237 | sc->sc_timo = INF; | |
238 | sc->sc_tact = 1; | |
c27ba986 | 239 | timeout(tmtimer, (caddr_t)dev, 5*hz); |
a752fee0 | 240 | } |
2311123d | 241 | splx(s); |
d75e5c3e BJ |
242 | } |
243 | ||
71236e46 BJ |
244 | /* |
245 | * Close tape device. | |
246 | * | |
247 | * If tape was open for writing or last operation was | |
248 | * a write, then write two EOF's and backspace over the last one. | |
249 | * Unless this is a non-rewinding special file, rewind the tape. | |
250 | * Make the tape available to others. | |
251 | */ | |
d75e5c3e BJ |
252 | tmclose(dev, flag) |
253 | register dev_t dev; | |
254 | register flag; | |
255 | { | |
d565635a | 256 | register struct te_softc *sc = &te_softc[TEUNIT(dev)]; |
d75e5c3e | 257 | |
71236e46 BJ |
258 | if (flag == FWRITE || (flag&FWRITE) && sc->sc_lastiow) { |
259 | tmcommand(dev, TM_WEOF, 1); | |
260 | tmcommand(dev, TM_WEOF, 1); | |
261 | tmcommand(dev, TM_SREV, 1); | |
d75e5c3e BJ |
262 | } |
263 | if ((minor(dev)&T_NOREWIND) == 0) | |
d565635a BJ |
264 | /* |
265 | * 0 count means don't hang waiting for rewind complete | |
266 | * rather ctmbuf stays busy until the operation completes | |
267 | * preventing further opens from completing by | |
268 | * preventing a TM_SENSE from completing. | |
269 | */ | |
270 | tmcommand(dev, TM_REW, 0); | |
7e00c42b | 271 | sc->sc_openf = 0; |
d75e5c3e BJ |
272 | } |
273 | ||
71236e46 BJ |
274 | /* |
275 | * Execute a command on the tape drive | |
276 | * a specified number of times. | |
277 | */ | |
e4271c68 | 278 | tmcommand(dev, com, count) |
d75e5c3e BJ |
279 | dev_t dev; |
280 | int com, count; | |
281 | { | |
282 | register struct buf *bp; | |
2311123d | 283 | register int s; |
d75e5c3e | 284 | |
71236e46 | 285 | bp = &ctmbuf[TMUNIT(dev)]; |
2311123d | 286 | s = spl5(); |
d75e5c3e | 287 | while (bp->b_flags&B_BUSY) { |
d565635a BJ |
288 | /* |
289 | * This special check is because B_BUSY never | |
290 | * gets cleared in the non-waiting rewind case. | |
291 | */ | |
27a897a2 | 292 | if (bp->b_repcnt == 0 && (bp->b_flags&B_DONE)) |
d565635a | 293 | break; |
d75e5c3e BJ |
294 | bp->b_flags |= B_WANTED; |
295 | sleep((caddr_t)bp, PRIBIO); | |
296 | } | |
297 | bp->b_flags = B_BUSY|B_READ; | |
2311123d | 298 | splx(s); |
d75e5c3e BJ |
299 | bp->b_dev = dev; |
300 | bp->b_repcnt = -count; | |
301 | bp->b_command = com; | |
302 | bp->b_blkno = 0; | |
303 | tmstrategy(bp); | |
d565635a BJ |
304 | /* |
305 | * In case of rewind from close, don't wait. | |
306 | * This is the only case where count can be 0. | |
307 | */ | |
308 | if (count == 0) | |
309 | return; | |
d75e5c3e BJ |
310 | iowait(bp); |
311 | if (bp->b_flags&B_WANTED) | |
312 | wakeup((caddr_t)bp); | |
313 | bp->b_flags &= B_ERROR; | |
314 | } | |
315 | ||
71236e46 | 316 | /* |
d565635a | 317 | * Queue a tape operation. |
71236e46 | 318 | */ |
d75e5c3e BJ |
319 | tmstrategy(bp) |
320 | register struct buf *bp; | |
321 | { | |
d565635a | 322 | int teunit = TEUNIT(bp->b_dev); |
89bd2f01 | 323 | register struct uba_ctlr *um; |
71236e46 | 324 | register struct buf *dp; |
2311123d | 325 | int s; |
d75e5c3e | 326 | |
71236e46 BJ |
327 | /* |
328 | * Put transfer at end of unit queue | |
329 | */ | |
d565635a | 330 | dp = &teutab[teunit]; |
d75e5c3e | 331 | bp->av_forw = NULL; |
2311123d | 332 | s = spl5(); |
06e2c4fb | 333 | um = tedinfo[teunit]->ui_mi; |
71236e46 BJ |
334 | if (dp->b_actf == NULL) { |
335 | dp->b_actf = bp; | |
336 | /* | |
337 | * Transport not already active... | |
338 | * put at end of controller queue. | |
339 | */ | |
340 | dp->b_forw = NULL; | |
71236e46 BJ |
341 | if (um->um_tab.b_actf == NULL) |
342 | um->um_tab.b_actf = dp; | |
343 | else | |
344 | um->um_tab.b_actl->b_forw = dp; | |
345 | um->um_tab.b_actl = dp; | |
346 | } else | |
347 | dp->b_actl->av_forw = bp; | |
348 | dp->b_actl = bp; | |
349 | /* | |
350 | * If the controller is not busy, get | |
351 | * it going. | |
352 | */ | |
353 | if (um->um_tab.b_active == 0) | |
354 | tmstart(um); | |
2311123d | 355 | splx(s); |
d75e5c3e BJ |
356 | } |
357 | ||
71236e46 BJ |
358 | /* |
359 | * Start activity on a tm controller. | |
360 | */ | |
361 | tmstart(um) | |
89bd2f01 | 362 | register struct uba_ctlr *um; |
d75e5c3e | 363 | { |
71236e46 | 364 | register struct buf *bp, *dp; |
a870f835 | 365 | register struct tmdevice *addr = (struct tmdevice *)um->um_addr; |
d565635a | 366 | register struct te_softc *sc; |
89bd2f01 | 367 | register struct uba_device *ui; |
d565635a | 368 | int teunit, cmd; |
7e00c42b | 369 | daddr_t blkno; |
d75e5c3e | 370 | |
71236e46 BJ |
371 | /* |
372 | * Look for an idle transport on the controller. | |
373 | */ | |
d75e5c3e | 374 | loop: |
71236e46 | 375 | if ((dp = um->um_tab.b_actf) == NULL) |
d75e5c3e | 376 | return; |
71236e46 BJ |
377 | if ((bp = dp->b_actf) == NULL) { |
378 | um->um_tab.b_actf = dp->b_forw; | |
379 | goto loop; | |
380 | } | |
d565635a BJ |
381 | teunit = TEUNIT(bp->b_dev); |
382 | ui = tedinfo[teunit]; | |
71236e46 BJ |
383 | /* |
384 | * Record pre-transfer status (e.g. for TM_SENSE) | |
385 | */ | |
d565635a | 386 | sc = &te_softc[teunit]; |
a870f835 | 387 | addr = (struct tmdevice *)um->um_addr; |
71236e46 | 388 | addr->tmcs = (ui->ui_slave << 8); |
7e00c42b BJ |
389 | sc->sc_dsreg = addr->tmcs; |
390 | sc->sc_erreg = addr->tmer; | |
391 | sc->sc_resid = addr->tmbc; | |
71236e46 BJ |
392 | /* |
393 | * Default is that last command was NOT a write command; | |
394 | * if we do a write command we will notice this in tmintr(). | |
395 | */ | |
bc9da2ca | 396 | sc->sc_lastiow = 0; |
71236e46 BJ |
397 | if (sc->sc_openf < 0 || (addr->tmcs&TM_CUR) == 0) { |
398 | /* | |
d565635a BJ |
399 | * Have had a hard error on a non-raw tape |
400 | * or the tape unit is now unavailable | |
401 | * (e.g. taken off line). | |
71236e46 BJ |
402 | */ |
403 | bp->b_flags |= B_ERROR; | |
d75e5c3e BJ |
404 | goto next; |
405 | } | |
d565635a BJ |
406 | if (bp == &ctmbuf[TMUNIT(bp->b_dev)]) { |
407 | /* | |
408 | * Execute control operation with the specified count. | |
409 | */ | |
71236e46 BJ |
410 | if (bp->b_command == TM_SENSE) |
411 | goto next; | |
a752fee0 BJ |
412 | /* |
413 | * Set next state; give 5 minutes to complete | |
414 | * rewind, or 10 seconds per iteration (minimum 60 | |
c27ba986 | 415 | * seconds and max 5 minutes) to complete other ops. |
a752fee0 BJ |
416 | */ |
417 | if (bp->b_command == TM_REW) { | |
418 | um->um_tab.b_active = SREW; | |
419 | sc->sc_timo = 5 * 60; | |
420 | } else { | |
421 | um->um_tab.b_active = SCOM; | |
0218811c BJ |
422 | sc->sc_timo = |
423 | imin(imax(10*(int)-bp->b_repcnt,60),5*60); | |
a752fee0 | 424 | } |
71236e46 BJ |
425 | if (bp->b_command == TM_SFORW || bp->b_command == TM_SREV) |
426 | addr->tmbc = bp->b_repcnt; | |
d1330646 | 427 | goto dobpcmd; |
71236e46 | 428 | } |
d565635a BJ |
429 | /* |
430 | * The following checks handle boundary cases for operation | |
431 | * on non-raw tapes. On raw tapes the initialization of | |
432 | * sc->sc_nxrec by tmphys causes them to be skipped normally | |
433 | * (except in the case of retries). | |
434 | */ | |
435 | if (dbtofsb(bp->b_blkno) > sc->sc_nxrec) { | |
436 | /* | |
437 | * Can't read past known end-of-file. | |
438 | */ | |
439 | bp->b_flags |= B_ERROR; | |
440 | bp->b_error = ENXIO; | |
441 | goto next; | |
442 | } | |
443 | if (dbtofsb(bp->b_blkno) == sc->sc_nxrec && | |
444 | bp->b_flags&B_READ) { | |
445 | /* | |
446 | * Reading at end of file returns 0 bytes. | |
447 | */ | |
448 | bp->b_resid = bp->b_bcount; | |
449 | clrbuf(bp); | |
450 | goto next; | |
451 | } | |
452 | if ((bp->b_flags&B_READ) == 0) | |
453 | /* | |
454 | * Writing sets EOF | |
455 | */ | |
456 | sc->sc_nxrec = dbtofsb(bp->b_blkno) + 1; | |
71236e46 BJ |
457 | /* |
458 | * If the data transfer command is in the correct place, | |
459 | * set up all the registers except the csr, and give | |
460 | * control over to the UNIBUS adapter routines, to | |
461 | * wait for resources to start the i/o. | |
462 | */ | |
7e00c42b | 463 | if ((blkno = sc->sc_blkno) == dbtofsb(bp->b_blkno)) { |
3f3a34c3 | 464 | addr->tmbc = -bp->b_bcount; |
d75e5c3e | 465 | if ((bp->b_flags&B_READ) == 0) { |
7e00c42b | 466 | if (um->um_tab.b_errcnt) |
d565635a | 467 | cmd = TM_WIRG; |
d75e5c3e | 468 | else |
d565635a | 469 | cmd = TM_WCOM; |
d75e5c3e | 470 | } else |
d565635a | 471 | cmd = TM_RCOM; |
7e00c42b | 472 | um->um_tab.b_active = SIO; |
d565635a | 473 | um->um_cmd = sc->sc_dens|cmd; |
80905075 | 474 | #ifdef notdef |
d1330646 | 475 | if (tmreverseop(sc->sc_lastcmd)) |
d565635a | 476 | while (addr->tmer & TMER_SDWN) |
d1330646 | 477 | tmgapsdcnt++; |
d1330646 | 478 | sc->sc_lastcmd = TM_RCOM; /* will serve */ |
80905075 | 479 | #endif |
a752fee0 | 480 | sc->sc_timo = 60; /* premature, but should serve */ |
a0eab615 | 481 | (void) ubago(ui); |
d75e5c3e BJ |
482 | return; |
483 | } | |
71236e46 | 484 | /* |
d565635a BJ |
485 | * Tape positioned incorrectly; |
486 | * set to seek forwards or backwards to the correct spot. | |
487 | * This happens for raw tapes only on error retries. | |
71236e46 | 488 | */ |
7e00c42b | 489 | um->um_tab.b_active = SSEEK; |
d75e5c3e | 490 | if (blkno < dbtofsb(bp->b_blkno)) { |
d1330646 | 491 | bp->b_command = TM_SFORW; |
3f3a34c3 | 492 | addr->tmbc = blkno - dbtofsb(bp->b_blkno); |
d75e5c3e | 493 | } else { |
d1330646 | 494 | bp->b_command = TM_SREV; |
3f3a34c3 | 495 | addr->tmbc = dbtofsb(bp->b_blkno) - blkno; |
d75e5c3e | 496 | } |
c27ba986 | 497 | sc->sc_timo = imin(imax(10 * -addr->tmbc, 60), 5 * 60); |
d1330646 | 498 | dobpcmd: |
80905075 | 499 | #ifdef notdef |
d565635a BJ |
500 | /* |
501 | * It is strictly necessary to wait for the tape | |
502 | * to stop before changing directions, but the TC11 | |
503 | * handles this for us. | |
504 | */ | |
d1330646 BJ |
505 | if (tmreverseop(sc->sc_lastcmd) != tmreverseop(bp->b_command)) |
506 | while (addr->tmer & TM_SDWN) | |
507 | tmgapsdcnt++; | |
d1330646 | 508 | sc->sc_lastcmd = bp->b_command; |
80905075 | 509 | #endif |
d565635a BJ |
510 | /* |
511 | * Do the command in bp. | |
512 | */ | |
513 | addr->tmcs = (sc->sc_dens | bp->b_command); | |
d75e5c3e BJ |
514 | return; |
515 | ||
516 | next: | |
71236e46 BJ |
517 | /* |
518 | * Done with this operation due to error or | |
519 | * the fact that it doesn't do anything. | |
520 | * Release UBA resources (if any), dequeue | |
521 | * the transfer and continue processing this slave. | |
522 | */ | |
523 | if (um->um_ubinfo) | |
0801d37f | 524 | ubadone(um); |
71236e46 BJ |
525 | um->um_tab.b_errcnt = 0; |
526 | dp->b_actf = bp->av_forw; | |
d75e5c3e BJ |
527 | iodone(bp); |
528 | goto loop; | |
529 | } | |
530 | ||
71236e46 BJ |
531 | /* |
532 | * The UNIBUS resources we needed have been | |
533 | * allocated to us; start the device. | |
534 | */ | |
e4271c68 | 535 | tmdgo(um) |
89bd2f01 | 536 | register struct uba_ctlr *um; |
3f3a34c3 | 537 | { |
a870f835 | 538 | register struct tmdevice *addr = (struct tmdevice *)um->um_addr; |
7e00c42b | 539 | |
e4271c68 BJ |
540 | addr->tmba = um->um_ubinfo; |
541 | addr->tmcs = um->um_cmd | ((um->um_ubinfo >> 12) & 0x30); | |
3f3a34c3 BJ |
542 | } |
543 | ||
71236e46 BJ |
544 | /* |
545 | * Tm interrupt routine. | |
546 | */ | |
7e00c42b | 547 | /*ARGSUSED*/ |
afb907f2 BJ |
548 | tmintr(tm11) |
549 | int tm11; | |
d75e5c3e | 550 | { |
71236e46 | 551 | struct buf *dp; |
d75e5c3e | 552 | register struct buf *bp; |
89bd2f01 | 553 | register struct uba_ctlr *um = tmminfo[tm11]; |
a870f835 | 554 | register struct tmdevice *addr; |
d565635a BJ |
555 | register struct te_softc *sc; |
556 | int teunit; | |
d75e5c3e BJ |
557 | register state; |
558 | ||
d565635a BJ |
559 | if ((dp = um->um_tab.b_actf) == NULL) |
560 | return; | |
561 | bp = dp->b_actf; | |
562 | teunit = TEUNIT(bp->b_dev); | |
a870f835 | 563 | addr = (struct tmdevice *)tedinfo[teunit]->ui_addr; |
6a476a42 | 564 | sc = &te_softc[teunit]; |
71236e46 BJ |
565 | /* |
566 | * If last command was a rewind, and tape is still | |
567 | * rewinding, wait for the rewind complete interrupt. | |
568 | */ | |
569 | if (um->um_tab.b_active == SREW) { | |
570 | um->um_tab.b_active = SCOM; | |
6a476a42 BJ |
571 | if (addr->tmer&TMER_RWS) { |
572 | sc->sc_timo = 5*60; /* 5 minutes */ | |
71236e46 | 573 | return; |
6a476a42 | 574 | } |
d75e5c3e | 575 | } |
71236e46 BJ |
576 | /* |
577 | * An operation completed... record status | |
578 | */ | |
a752fee0 | 579 | sc->sc_timo = INF; |
7e00c42b BJ |
580 | sc->sc_dsreg = addr->tmcs; |
581 | sc->sc_erreg = addr->tmer; | |
582 | sc->sc_resid = addr->tmbc; | |
d75e5c3e | 583 | if ((bp->b_flags & B_READ) == 0) |
71236e46 | 584 | sc->sc_lastiow = 1; |
7e00c42b BJ |
585 | state = um->um_tab.b_active; |
586 | um->um_tab.b_active = 0; | |
71236e46 BJ |
587 | /* |
588 | * Check for errors. | |
589 | */ | |
590 | if (addr->tmcs&TM_ERR) { | |
d565635a | 591 | while (addr->tmer & TMER_SDWN) |
d75e5c3e | 592 | ; /* await settle down */ |
71236e46 | 593 | /* |
d565635a | 594 | * If we hit the end of the tape file, update our position. |
71236e46 | 595 | */ |
d565635a | 596 | if (addr->tmer&TMER_EOF) { |
71236e46 BJ |
597 | tmseteof(bp); /* set blkno and nxrec */ |
598 | state = SCOM; /* force completion */ | |
599 | /* | |
600 | * Stuff bc so it will be unstuffed correctly | |
601 | * later to get resid. | |
602 | */ | |
3f3a34c3 | 603 | addr->tmbc = -bp->b_bcount; |
71236e46 | 604 | goto opdone; |
d75e5c3e | 605 | } |
71236e46 | 606 | /* |
d565635a BJ |
607 | * If we were reading raw tape and the only error was that the |
608 | * record was too long, then we don't consider this an error. | |
71236e46 | 609 | */ |
d565635a BJ |
610 | if (bp == &rtmbuf[TMUNIT(bp->b_dev)] && (bp->b_flags&B_READ) && |
611 | (addr->tmer&(TMER_HARD|TMER_SOFT)) == TMER_RLE) | |
71236e46 BJ |
612 | goto ignoreerr; |
613 | /* | |
614 | * If error is not hard, and this was an i/o operation | |
615 | * retry up to 8 times. | |
616 | */ | |
d565635a | 617 | if ((addr->tmer&TMER_HARD)==0 && state==SIO) { |
7e00c42b | 618 | if (++um->um_tab.b_errcnt < 7) { |
7e00c42b | 619 | sc->sc_blkno++; |
0801d37f | 620 | ubadone(um); |
71236e46 | 621 | goto opcont; |
d75e5c3e | 622 | } |
71236e46 BJ |
623 | } else |
624 | /* | |
625 | * Hard or non-i/o errors on non-raw tape | |
626 | * cause it to close. | |
627 | */ | |
d565635a | 628 | if (sc->sc_openf>0 && bp != &rtmbuf[TMUNIT(bp->b_dev)]) |
71236e46 BJ |
629 | sc->sc_openf = -1; |
630 | /* | |
631 | * Couldn't recover error | |
632 | */ | |
80905075 | 633 | printf("te%d: hard error bn%d er=%b\n", minor(bp->b_dev)&03, |
d565635a | 634 | bp->b_blkno, sc->sc_erreg, TMER_BITS); |
d75e5c3e | 635 | bp->b_flags |= B_ERROR; |
71236e46 | 636 | goto opdone; |
d75e5c3e | 637 | } |
71236e46 BJ |
638 | /* |
639 | * Advance tape control FSM. | |
640 | */ | |
641 | ignoreerr: | |
d75e5c3e BJ |
642 | switch (state) { |
643 | ||
644 | case SIO: | |
71236e46 BJ |
645 | /* |
646 | * Read/write increments tape block number | |
647 | */ | |
7e00c42b | 648 | sc->sc_blkno++; |
71236e46 | 649 | goto opdone; |
d75e5c3e BJ |
650 | |
651 | case SCOM: | |
71236e46 | 652 | /* |
d565635a | 653 | * For forward/backward space record update current position. |
71236e46 | 654 | */ |
d565635a | 655 | if (bp == &ctmbuf[TMUNIT(bp->b_dev)]) |
71236e46 BJ |
656 | switch (bp->b_command) { |
657 | ||
658 | case TM_SFORW: | |
659 | sc->sc_blkno -= bp->b_repcnt; | |
d565635a | 660 | break; |
71236e46 BJ |
661 | |
662 | case TM_SREV: | |
663 | sc->sc_blkno += bp->b_repcnt; | |
d565635a | 664 | break; |
d75e5c3e | 665 | } |
d565635a | 666 | goto opdone; |
d75e5c3e BJ |
667 | |
668 | case SSEEK: | |
7e00c42b | 669 | sc->sc_blkno = dbtofsb(bp->b_blkno); |
71236e46 | 670 | goto opcont; |
d75e5c3e BJ |
671 | |
672 | default: | |
71236e46 | 673 | panic("tmintr"); |
d75e5c3e | 674 | } |
71236e46 BJ |
675 | opdone: |
676 | /* | |
677 | * Reset error count and remove | |
678 | * from device queue. | |
679 | */ | |
680 | um->um_tab.b_errcnt = 0; | |
681 | dp->b_actf = bp->av_forw; | |
682 | bp->b_resid = -addr->tmbc; | |
0801d37f | 683 | ubadone(um); |
71236e46 BJ |
684 | iodone(bp); |
685 | /* | |
686 | * Circulate slave to end of controller | |
687 | * queue to give other slaves a chance. | |
688 | */ | |
689 | um->um_tab.b_actf = dp->b_forw; | |
690 | if (dp->b_actf) { | |
691 | dp->b_forw = NULL; | |
692 | if (um->um_tab.b_actf == NULL) | |
693 | um->um_tab.b_actf = dp; | |
694 | else | |
695 | um->um_tab.b_actl->b_forw = dp; | |
696 | um->um_tab.b_actl = dp; | |
697 | } | |
698 | if (um->um_tab.b_actf == 0) | |
699 | return; | |
700 | opcont: | |
701 | tmstart(um); | |
d75e5c3e BJ |
702 | } |
703 | ||
a752fee0 BJ |
704 | tmtimer(dev) |
705 | int dev; | |
706 | { | |
707 | register struct te_softc *sc = &te_softc[TEUNIT(dev)]; | |
afa0df56 | 708 | register short x; |
a752fee0 BJ |
709 | |
710 | if (sc->sc_timo != INF && (sc->sc_timo -= 5) < 0) { | |
aa4e15a3 | 711 | printf("te%d: lost interrupt\n", TEUNIT(dev)); |
a752fee0 | 712 | sc->sc_timo = INF; |
afa0df56 | 713 | x = spl5(); |
a752fee0 | 714 | tmintr(TMUNIT(dev)); |
afa0df56 | 715 | (void) splx(x); |
a752fee0 | 716 | } |
c27ba986 | 717 | timeout(tmtimer, (caddr_t)dev, 5*hz); |
a752fee0 BJ |
718 | } |
719 | ||
d75e5c3e BJ |
720 | tmseteof(bp) |
721 | register struct buf *bp; | |
722 | { | |
d565635a | 723 | register int teunit = TEUNIT(bp->b_dev); |
a870f835 BJ |
724 | register struct tmdevice *addr = |
725 | (struct tmdevice *)tedinfo[teunit]->ui_addr; | |
d565635a | 726 | register struct te_softc *sc = &te_softc[teunit]; |
d75e5c3e | 727 | |
d565635a | 728 | if (bp == &ctmbuf[TMUNIT(bp->b_dev)]) { |
7e00c42b | 729 | if (sc->sc_blkno > dbtofsb(bp->b_blkno)) { |
d75e5c3e | 730 | /* reversing */ |
7e00c42b BJ |
731 | sc->sc_nxrec = dbtofsb(bp->b_blkno) - addr->tmbc; |
732 | sc->sc_blkno = sc->sc_nxrec; | |
d75e5c3e BJ |
733 | } else { |
734 | /* spacing forward */ | |
7e00c42b BJ |
735 | sc->sc_blkno = dbtofsb(bp->b_blkno) + addr->tmbc; |
736 | sc->sc_nxrec = sc->sc_blkno - 1; | |
d75e5c3e BJ |
737 | } |
738 | return; | |
739 | } | |
740 | /* eof on read */ | |
7e00c42b | 741 | sc->sc_nxrec = dbtofsb(bp->b_blkno); |
d75e5c3e BJ |
742 | } |
743 | ||
744 | tmread(dev) | |
71236e46 | 745 | dev_t dev; |
d75e5c3e BJ |
746 | { |
747 | ||
748 | tmphys(dev); | |
89bd2f01 BJ |
749 | if (u.u_error) |
750 | return; | |
71236e46 | 751 | physio(tmstrategy, &rtmbuf[TMUNIT(dev)], dev, B_READ, minphys); |
d75e5c3e BJ |
752 | } |
753 | ||
754 | tmwrite(dev) | |
71236e46 | 755 | dev_t dev; |
d75e5c3e BJ |
756 | { |
757 | ||
758 | tmphys(dev); | |
89bd2f01 BJ |
759 | if (u.u_error) |
760 | return; | |
71236e46 | 761 | physio(tmstrategy, &rtmbuf[TMUNIT(dev)], dev, B_WRITE, minphys); |
d75e5c3e BJ |
762 | } |
763 | ||
d565635a BJ |
764 | /* |
765 | * Check that a raw device exists. | |
766 | * If it does, set up sc_blkno and sc_nxrec | |
767 | * so that the tape will appear positioned correctly. | |
768 | */ | |
d75e5c3e | 769 | tmphys(dev) |
71236e46 | 770 | dev_t dev; |
d75e5c3e | 771 | { |
d565635a | 772 | register int teunit = TEUNIT(dev); |
d75e5c3e | 773 | register daddr_t a; |
d565635a BJ |
774 | register struct te_softc *sc; |
775 | register struct uba_device *ui; | |
d75e5c3e | 776 | |
d565635a | 777 | if (teunit >= NTE || (ui=tedinfo[teunit]) == 0 || ui->ui_alive == 0) { |
89bd2f01 BJ |
778 | u.u_error = ENXIO; |
779 | return; | |
780 | } | |
d565635a | 781 | sc = &te_softc[teunit]; |
d75e5c3e | 782 | a = dbtofsb(u.u_offset >> 9); |
7e00c42b BJ |
783 | sc->sc_blkno = a; |
784 | sc->sc_nxrec = a + 1; | |
d75e5c3e BJ |
785 | } |
786 | ||
71236e46 BJ |
787 | tmreset(uban) |
788 | int uban; | |
789 | { | |
89bd2f01 | 790 | register struct uba_ctlr *um; |
d565635a | 791 | register tm11, teunit; |
89bd2f01 | 792 | register struct uba_device *ui; |
71236e46 BJ |
793 | register struct buf *dp; |
794 | ||
afb907f2 BJ |
795 | for (tm11 = 0; tm11 < NTM; tm11++) { |
796 | if ((um = tmminfo[tm11]) == 0 || um->um_alive == 0 || | |
71236e46 BJ |
797 | um->um_ubanum != uban) |
798 | continue; | |
80905075 | 799 | printf(" tm%d", tm11); |
71236e46 BJ |
800 | um->um_tab.b_active = 0; |
801 | um->um_tab.b_actf = um->um_tab.b_actl = 0; | |
802 | if (um->um_ubinfo) { | |
803 | printf("<%d>", (um->um_ubinfo>>28)&0xf); | |
0801d37f | 804 | ubadone(um); |
71236e46 | 805 | } |
a870f835 | 806 | ((struct tmdevice *)(um->um_addr))->tmcs = TM_DCLR; |
d565635a BJ |
807 | for (teunit = 0; teunit < NTE; teunit++) { |
808 | if ((ui = tedinfo[teunit]) == 0 || ui->ui_mi != um || | |
809 | ui->ui_alive == 0) | |
71236e46 | 810 | continue; |
d565635a | 811 | dp = &teutab[teunit]; |
71236e46 BJ |
812 | dp->b_active = 0; |
813 | dp->b_forw = 0; | |
814 | if (um->um_tab.b_actf == NULL) | |
815 | um->um_tab.b_actf = dp; | |
816 | else | |
817 | um->um_tab.b_actl->b_forw = dp; | |
818 | um->um_tab.b_actl = dp; | |
a752fee0 BJ |
819 | if (te_softc[teunit].sc_openf > 0) |
820 | te_softc[teunit].sc_openf = -1; | |
71236e46 BJ |
821 | } |
822 | tmstart(um); | |
823 | } | |
824 | } | |
825 | ||
d75e5c3e BJ |
826 | /*ARGSUSED*/ |
827 | tmioctl(dev, cmd, addr, flag) | |
828 | caddr_t addr; | |
829 | dev_t dev; | |
830 | { | |
d565635a BJ |
831 | int teunit = TEUNIT(dev); |
832 | register struct te_softc *sc = &te_softc[teunit]; | |
833 | register struct buf *bp = &ctmbuf[TMUNIT(dev)]; | |
d75e5c3e BJ |
834 | register callcount; |
835 | int fcount; | |
836 | struct mtop mtop; | |
837 | struct mtget mtget; | |
838 | /* we depend of the values and order of the MT codes here */ | |
71236e46 BJ |
839 | static tmops[] = |
840 | {TM_WEOF,TM_SFORW,TM_SREV,TM_SFORW,TM_SREV,TM_REW,TM_OFFL,TM_SENSE}; | |
d75e5c3e | 841 | |
71236e46 | 842 | switch (cmd) { |
d75e5c3e BJ |
843 | case MTIOCTOP: /* tape operation */ |
844 | if (copyin((caddr_t)addr, (caddr_t)&mtop, sizeof(mtop))) { | |
845 | u.u_error = EFAULT; | |
846 | return; | |
847 | } | |
848 | switch(mtop.mt_op) { | |
71236e46 BJ |
849 | case MTWEOF: |
850 | callcount = mtop.mt_count; | |
851 | fcount = 1; | |
852 | break; | |
853 | case MTFSF: case MTBSF: | |
d75e5c3e BJ |
854 | callcount = mtop.mt_count; |
855 | fcount = INF; | |
856 | break; | |
857 | case MTFSR: case MTBSR: | |
858 | callcount = 1; | |
859 | fcount = mtop.mt_count; | |
860 | break; | |
77115c00 | 861 | case MTREW: case MTOFFL: case MTNOP: |
d75e5c3e BJ |
862 | callcount = 1; |
863 | fcount = 1; | |
864 | break; | |
865 | default: | |
866 | u.u_error = ENXIO; | |
867 | return; | |
868 | } | |
71236e46 | 869 | if (callcount <= 0 || fcount <= 0) { |
d75e5c3e | 870 | u.u_error = ENXIO; |
71236e46 BJ |
871 | return; |
872 | } | |
873 | while (--callcount >= 0) { | |
e4271c68 | 874 | tmcommand(dev, tmops[mtop.mt_op], fcount); |
d75e5c3e | 875 | if ((mtop.mt_op == MTFSR || mtop.mt_op == MTBSR) && |
71236e46 | 876 | bp->b_resid) { |
d75e5c3e BJ |
877 | u.u_error = EIO; |
878 | break; | |
879 | } | |
d565635a | 880 | if ((bp->b_flags&B_ERROR) || sc->sc_erreg&TMER_BOT) |
d75e5c3e BJ |
881 | break; |
882 | } | |
71236e46 | 883 | geterror(bp); |
d75e5c3e BJ |
884 | return; |
885 | case MTIOCGET: | |
7e00c42b BJ |
886 | mtget.mt_dsreg = sc->sc_dsreg; |
887 | mtget.mt_erreg = sc->sc_erreg; | |
888 | mtget.mt_resid = sc->sc_resid; | |
65e74b33 | 889 | mtget.mt_type = MT_ISTM; |
d75e5c3e BJ |
890 | if (copyout((caddr_t)&mtget, addr, sizeof(mtget))) |
891 | u.u_error = EFAULT; | |
892 | return; | |
893 | default: | |
894 | u.u_error = ENXIO; | |
895 | } | |
896 | } | |
897 | ||
898 | #define DBSIZE 20 | |
899 | ||
7455bf3e | 900 | tmdump() |
d75e5c3e | 901 | { |
89bd2f01 | 902 | register struct uba_device *ui; |
3f3a34c3 | 903 | register struct uba_regs *up; |
a870f835 | 904 | register struct tmdevice *addr; |
5aa9d5ea RE |
905 | int blk, num; |
906 | int start; | |
d75e5c3e | 907 | |
5aa9d5ea RE |
908 | start = 0; |
909 | num = maxfree; | |
910 | #define phys(a,b) ((b)((int)(a)&0x7fffffff)) | |
d565635a | 911 | if (tedinfo[0] == 0) |
2536c16c | 912 | return (ENXIO); |
d565635a | 913 | ui = phys(tedinfo[0], struct uba_device *); |
3f3a34c3 | 914 | up = phys(ui->ui_hd, struct uba_hd *)->uh_physuba; |
57229699 | 915 | ubainit(up); |
77115c00 | 916 | DELAY(1000000); |
a870f835 | 917 | addr = (struct tmdevice *)ui->ui_physaddr; |
3f3a34c3 | 918 | tmwait(addr); |
71236e46 | 919 | addr->tmcs = TM_DCLR | TM_GO; |
d75e5c3e BJ |
920 | while (num > 0) { |
921 | blk = num > DBSIZE ? DBSIZE : num; | |
3f3a34c3 | 922 | tmdwrite(start, blk, addr, up); |
d75e5c3e BJ |
923 | start += blk; |
924 | num -= blk; | |
925 | } | |
5aa9d5ea RE |
926 | tmeof(addr); |
927 | tmeof(addr); | |
7e00c42b | 928 | tmwait(addr); |
2536c16c BJ |
929 | if (addr->tmcs&TM_ERR) |
930 | return (EIO); | |
71236e46 | 931 | addr->tmcs = TM_REW | TM_GO; |
5aa9d5ea | 932 | tmwait(addr); |
7455bf3e | 933 | return (0); |
d75e5c3e BJ |
934 | } |
935 | ||
71236e46 BJ |
936 | tmdwrite(dbuf, num, addr, up) |
937 | register dbuf, num; | |
a870f835 | 938 | register struct tmdevice *addr; |
3f3a34c3 | 939 | struct uba_regs *up; |
d75e5c3e | 940 | { |
3f3a34c3 BJ |
941 | register struct pte *io; |
942 | register int npf; | |
0a51498e | 943 | |
3f3a34c3 | 944 | tmwait(addr); |
3f3a34c3 | 945 | io = up->uba_map; |
d75e5c3e | 946 | npf = num+1; |
0a51498e | 947 | while (--npf != 0) |
89bd2f01 | 948 | *(int *)io++ = (dbuf++ | (1<<UBAMR_DPSHIFT) | UBAMR_MRV); |
3f3a34c3 BJ |
949 | *(int *)io = 0; |
950 | addr->tmbc = -(num*NBPG); | |
951 | addr->tmba = 0; | |
71236e46 | 952 | addr->tmcs = TM_WCOM | TM_GO; |
d75e5c3e BJ |
953 | } |
954 | ||
3f3a34c3 | 955 | tmwait(addr) |
a870f835 | 956 | register struct tmdevice *addr; |
d75e5c3e | 957 | { |
0a51498e | 958 | register s; |
d75e5c3e BJ |
959 | |
960 | do | |
3f3a34c3 | 961 | s = addr->tmcs; |
71236e46 | 962 | while ((s & TM_CUR) == 0); |
d75e5c3e BJ |
963 | } |
964 | ||
3f3a34c3 | 965 | tmeof(addr) |
a870f835 | 966 | struct tmdevice *addr; |
d75e5c3e BJ |
967 | { |
968 | ||
3f3a34c3 | 969 | tmwait(addr); |
71236e46 | 970 | addr->tmcs = TM_WEOF | TM_GO; |
d75e5c3e BJ |
971 | } |
972 | #endif |