Commit | Line | Data |
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3590c922 SL |
1 | /* cy.c 1.1 85/07/21 */ |
2 | /* cy.c Tahoe version Mar 1983. */ | |
3 | ||
4 | #include "cy.h" | |
5 | #if NCY > 0 /* number of CYPHER tapes in system */ | |
6 | /* | |
7 | * Cypher tape driver | |
8 | * | |
9 | */ | |
10 | #include "../h/param.h" | |
11 | #include "../h/systm.h" | |
12 | #include "../h/vm.h" | |
13 | #include "../h/buf.h" | |
14 | #include "../h/dir.h" | |
15 | #include "../h/conf.h" | |
16 | #include "../h/user.h" | |
17 | #include "../h/file.h" | |
18 | #include "../machine/pte.h" | |
19 | #include "../vba/vbavar.h" | |
20 | #include "../h/mtio.h" | |
21 | #include "../machine/mtpr.h" | |
22 | #include "../h/ioctl.h" | |
23 | #include "../h/cmap.h" | |
24 | #include "../h/uio.h" | |
25 | ||
26 | #include "../vba/cyvar.h" | |
27 | ||
28 | #define NTM 1 /* number of TAPEMASTER controllers */ | |
29 | ||
30 | /* | |
31 | * There is a ccybuf per tape controller. | |
32 | * It is used as the token to pass to the control routines | |
33 | * and also acts as a lock on the slaves on the | |
34 | * controller, since there is only one per controller. | |
35 | * In particular, when the tape is rewinding on close we release | |
36 | * the user process but any further attempts to use the tape drive | |
37 | * before the rewind completes will hang waiting for ccybuf. | |
38 | */ | |
39 | struct buf ccybuf[NTM]; | |
40 | ||
41 | /* | |
42 | * Raw tape operations use rcybuf. The driver | |
43 | * notices when rcybuf is being used and allows the user | |
44 | * program to continue after errors and read records | |
45 | * not of the standard length (BSIZE). | |
46 | */ | |
47 | struct buf rcybuf[NTM]; | |
48 | long cybufused = 0; | |
49 | ||
50 | /* | |
51 | * Driver interface routines and variables. | |
52 | */ | |
53 | int cyprobe(), cyslave(), cyattach(), cydgo(), cyintr(); | |
54 | int cywait(), cyrewind(); | |
55 | unsigned tminphys(); | |
56 | struct vba_ctlr *cyminfo[NTM]; | |
57 | struct vba_device *cydinfo[NCY]; | |
58 | struct buf cyutab[NCY]; | |
59 | short cytotm[NCY]; | |
60 | extern char cyutl[]; | |
61 | long cystd[] = { 0x400000, 0 }; | |
62 | struct vba_driver cydriver = | |
63 | { cyprobe, cyslave, cyattach, cydgo, cystd, "yc", cydinfo, "cy", | |
64 | cyminfo, 0 }; | |
65 | ||
66 | /* bits in minor device */ | |
67 | #define CYUNIT(dev) (minor(dev)&07) /* tape unit number */ | |
68 | #define TMUNIT(dev) (cytotm[CYUNIT(dev)]) /* tape controller number */ | |
69 | #define T_NOREWIND 0x08 /* no rewind bit */ | |
70 | #define T_100IPS 0x10 /* high speed flag */ | |
71 | ||
72 | int pflag; /* probe flag, set every interrupt by cyintr */ | |
73 | ||
74 | #define INF (daddr_t)1000000L | |
75 | extern int hz; | |
76 | ||
77 | struct scp /* SYSTEM CONFIGUREATION POINTER */ | |
78 | { | |
79 | char sysbus ; /* width of system buss 0=8;1=16 */ | |
80 | char nu1 ; | |
81 | char pt_scb[4] ; /* pointer to ->SYSTEM CONFIGUREATION BLOCK */ | |
82 | }; | |
83 | ||
84 | /* absolute address - jumpered on the controller */ | |
85 | #define SCP ((struct scp *)0xc0000c06) | |
86 | ||
87 | struct Scb /* SYSTEM CONFIGUREATION BLOCK */ | |
88 | { | |
89 | char sysblk[1] ; /* 0x03 fixed value code */ | |
90 | char nu2[1] ; | |
91 | char pt_ccb[4] ; /* pointer to ->CHANNEL CONTROL BLOCK */ | |
92 | }Scb; | |
93 | ||
94 | struct ccb /* CHANNEL CONTROL BLOCK */ | |
95 | { | |
96 | char ccw[1] ; /* 0x11 normal; 0x09 clear non_vect interrupt */ | |
97 | char gate[1] ; /* This is "the" GATE */ | |
98 | char pt_tpb[4] ; /* pointer to ->TAPE OPERATION BLOCK or MOVE BLOCK */ | |
99 | }ccb; | |
100 | ||
101 | struct tpb /* TAPE OPERATIONS PARAMETER BLOCK */ | |
102 | { | |
103 | long cmd ; /* COMMAND (input) */ | |
104 | char control[2] ; /* CONTROL (input) */ | |
105 | short count ; /* RETURN COUNT (output) */ | |
106 | short size ; /* BUFFER SIZE (input/output) */ | |
107 | short rec_over ; /* RECORDS/OVERRUN (input/output) */ | |
108 | char pt_data[4] ; /* pointer to ->SOURCE/DEST (input) */ | |
109 | char status[2] ; /* STATUS (output) */ | |
110 | char pt_link[4] ; /* pointer to ->INTERRUPT/PARAMETER BLOCK (input) */ | |
111 | } tpb[NTM]; | |
112 | ||
113 | struct tpb cycool /* tape parameter block to clear interrupts */ | |
114 | = { | |
115 | 0L, /* command */ | |
116 | 0, 0, /* control */ | |
117 | 0, /* count */ | |
118 | 0, /* size */ | |
119 | 0, /* rec_over */ | |
120 | 0, 0, 0, 0, /* pt_data */ | |
121 | 0, 0, /* status */ | |
122 | 0, 0, 0, 0 /* pt_link */ | |
123 | } ; | |
124 | /* | |
125 | * Software state per tape transport. | |
126 | * | |
127 | * 1. A tape drive is a unique-open device; we refuse opens when it is already. | |
128 | * 2. We keep track of the current position on a block tape and seek | |
129 | * before operations by forward/back spacing if necessary. | |
130 | * 3. We remember if the last operation was a write on a tape, so if a tape | |
131 | * is open read write and the last thing done is a write we can | |
132 | * write a standard end of tape mark (two eofs). | |
133 | */ | |
134 | struct cy_softc { | |
135 | char cy_openf; /* lock against multiple opens */ | |
136 | char cy_lastiow; /* last op was a write */ | |
137 | daddr_t cy_blkno; /* block number, for block device tape */ | |
138 | daddr_t cy_nxrec; /* position of end of tape, if known */ | |
139 | daddr_t cy_timo; /* time until timeout expires */ | |
140 | short cy_tact; /* timeout is active */ | |
141 | short cy_count; /* return count of last operation */ | |
142 | char cy_status[2]; /* return status of last operation */ | |
143 | } cy_softc[NTM]; | |
144 | ||
145 | /* | |
146 | * I/O buffer for raw devices. | |
147 | */ | |
148 | char cybuf[TBUFSIZ*NBPG]; /* 10k buffer */ | |
149 | ||
150 | /* | |
151 | * States for um->um_tab.b_active, the per controller state flag. | |
152 | * This is used to sequence control in the driver. | |
153 | */ | |
154 | #define SSEEK 1 /* seeking */ | |
155 | #define SIO 2 /* doing seq i/o */ | |
156 | #define SCOM 3 /* sending control command */ | |
157 | #define SREW 4 /* sending a drive rewind */ | |
158 | ||
159 | /* | |
160 | * Determine if there is a controller for | |
161 | * a cypher at address ctlr_vaddr. | |
162 | * Reset the controller. | |
163 | * Our goal is to make the device interrupt. | |
164 | */ | |
165 | cyprobe(ctlr_vaddr) | |
166 | caddr_t ctlr_vaddr; | |
167 | { | |
168 | int *ip; | |
169 | ||
170 | pflag = 0; /* clear interrupt flag */ | |
171 | if (badcyaddr(ctlr_vaddr + 1)) /* check for versabuss timeout */ | |
172 | return (0); | |
173 | /* | |
174 | * Initialize the system configuration pointer | |
175 | */ | |
176 | ip = (int *)vtopte(0, btop(SCP)); *ip &= ~PG_PROT; *ip |= PG_KW; | |
177 | mtpr(SCP, TBIS); | |
178 | SCP->sysbus = 1; /* system width = 16 bits. */ | |
179 | /* initialize the pointer to the system configuration block */ | |
180 | set_pointer((int)&Scb.sysblk[0], (char *)SCP->pt_scb); | |
181 | /* | |
182 | * Initialize the system configuration block. | |
183 | */ | |
184 | Scb.sysblk[0] = 0x3; /* fixed value */ | |
185 | /* initialize the pointer to the channel control block */ | |
186 | set_pointer((int)&ccb.ccw[0], (char *)Scb.pt_ccb); | |
187 | /* | |
188 | * Initialize the channel control block. | |
189 | */ | |
190 | ccb.ccw[0] = 0x11; /* normal interrupts */ | |
191 | /* initialize the pointer to the tape parameter block */ | |
192 | set_pointer((int)&tpb[0], (char *)ccb.pt_tpb); | |
193 | /* | |
194 | * set the command to be CONFIGURE. | |
195 | */ | |
196 | tpb[0].cmd = CONFIG; | |
197 | tpb[0].control[0] = CW_I; /* interrupt on completion */ | |
198 | tpb[0].control[1] = CW_16bits; | |
199 | ccb.gate[0] = GATE_CLOSED; | |
200 | *ip &= ~PG_PROT; *ip |= PG_KR; | |
201 | mtpr(SCP, TBIS); | |
202 | TM_ATTENTION(ctlr_vaddr, 0xff); /* execute! */ | |
203 | if (cywait()) return(0); | |
204 | else return(1); | |
205 | } | |
206 | ||
207 | /* | |
208 | * Due to a design flaw, we cannot ascertain if the tape | |
209 | * exists or not unless it is on line - ie: unless a tape is | |
210 | * mounted. This is too severe a restriction to bear, | |
211 | * so all units are assumed to exist. | |
212 | */ | |
213 | /*ARGSUSED*/ | |
214 | cyslave(ui, ctlr_vaddr) | |
215 | struct vba_device *ui; | |
216 | caddr_t ctlr_vaddr; | |
217 | { | |
218 | ||
219 | return (1); | |
220 | } | |
221 | ||
222 | /* | |
223 | * Record attachment of the unit to the controller. | |
224 | */ | |
225 | /*ARGSUSED*/ | |
226 | cyattach(ui) | |
227 | struct vba_device *ui; | |
228 | { | |
229 | ||
230 | /* | |
231 | * Cytotm is used in TMUNIT to index the ccybuf and rcybuf | |
232 | * arrays given a cy unit number. | |
233 | */ | |
234 | cytotm[ui->ui_unit] = ui->ui_mi->um_ctlr; | |
235 | } | |
236 | ||
237 | int cytimer(); | |
238 | /* | |
239 | * Open the device. Tapes are unique open | |
240 | * devices, so we refuse if it is already open. | |
241 | * We also check that a tape is available, and | |
242 | * don't block waiting here; if you want to wait | |
243 | * for a tape you should timeout in user code. | |
244 | */ | |
245 | cyopen(dev, flag) | |
246 | dev_t dev; | |
247 | int flag; | |
248 | { | |
249 | register int cyunit, s; | |
250 | register struct vba_device *ui; | |
251 | register struct cy_softc *cy; | |
252 | ||
253 | cyunit = CYUNIT(dev); | |
254 | if (cyunit>=NCY || (cy = &cy_softc[cyunit])->cy_openf || | |
255 | (ui = cydinfo[cyunit]) == 0 || ui->ui_alive == 0) | |
256 | return ENXIO; | |
257 | cycommand(dev, (int)DRIVE_S, 1); /* drive status */ | |
258 | uncache(&tpb[cyunit].status[0]); | |
259 | if ((tpb[cyunit].status[0]&(CS_DR|CS_OL)) != (CS_DR|CS_OL)) { | |
260 | uprintf("cy%d: not online\n", cyunit); | |
261 | return EIO; | |
262 | } | |
263 | if ((flag&FWRITE) && (tpb[cyunit].status[0]&CS_P)) { | |
264 | uprintf("cy%d: no write ring\n", cyunit); | |
265 | return EIO; | |
266 | } | |
267 | cy->cy_openf = 1; | |
268 | cy->cy_blkno = (daddr_t)0; | |
269 | cy->cy_nxrec = INF; | |
270 | cy->cy_lastiow = 0; | |
271 | s = spl8(); | |
272 | if (cy->cy_tact == 0) { | |
273 | cy->cy_timo = INF; | |
274 | cy->cy_tact = 1; | |
275 | timeout(cytimer, (caddr_t)dev, 5*hz); | |
276 | } | |
277 | splx(s); | |
278 | return 0; | |
279 | } | |
280 | ||
281 | /* | |
282 | * Close tape device. | |
283 | * | |
284 | * If tape was open for writing or last operation was | |
285 | * a write, then write two EOF's and backspace over the last one. | |
286 | * Unless this is a non-rewinding special file, rewind the tape. | |
287 | * Make the tape available to others. | |
288 | */ | |
289 | cyclose(dev, flag) | |
290 | register dev_t dev; | |
291 | register flag; | |
292 | { | |
293 | register struct cy_softc *cy = &cy_softc[CYUNIT(dev)]; | |
294 | ||
295 | if (flag == FWRITE || (flag&FWRITE) && cy->cy_lastiow) { | |
296 | cycommand(dev, (int)WRIT_FM, 1); /* write file mark */ | |
297 | cycommand(dev, (int)WRIT_FM, 1); | |
298 | cycommand(dev, (int)SP_BACK, 1); /* space back */ | |
299 | } | |
300 | if ((minor(dev)&T_NOREWIND) == 0) | |
301 | /* | |
302 | * 0 count means don't hang waiting for rewind complete | |
303 | * rather ccybuf stays busy until the operation completes | |
304 | * preventing further opens from completing by | |
305 | * preventing a SENSE operation from completing. | |
306 | */ | |
307 | cycommand(dev, (int)REWD_TA, 0); | |
308 | cy->cy_openf = 0; | |
309 | } | |
310 | ||
311 | int commflag; /* signal cystrategy that it is called from cycommand */ | |
312 | ||
313 | /* | |
314 | * Execute a command on the tape drive | |
315 | * a specified number of times. | |
316 | */ | |
317 | cycommand(dev, com, count) | |
318 | dev_t dev; | |
319 | int com, count; | |
320 | { | |
321 | register struct buf *bp; | |
322 | int s; | |
323 | ||
324 | bp = &ccybuf[TMUNIT(dev)]; | |
325 | s = spl8(); | |
326 | while (bp->b_flags&B_BUSY) { | |
327 | /* | |
328 | * This special check is because B_BUSY never | |
329 | * gets cleared in the non-waiting rewind case. | |
330 | */ | |
331 | if (bp->b_repcnt == 0 && (bp->b_flags&B_DONE)) | |
332 | break; | |
333 | bp->b_flags |= B_WANTED; | |
334 | sleep((caddr_t)bp, PRIBIO); | |
335 | } | |
336 | bp->b_flags = B_BUSY|B_READ; | |
337 | splx(s); | |
338 | bp->b_dev = dev; | |
339 | bp->b_repcnt = count; | |
340 | bp->b_command = com; | |
341 | bp->b_blkno = 0; | |
342 | commflag = 1; | |
343 | cystrategy(bp); | |
344 | commflag = 0; | |
345 | /* | |
346 | * In case of rewind from close, don't wait. | |
347 | * This is the only case where count can be 0. | |
348 | */ | |
349 | if (count == 0) | |
350 | return; | |
351 | iowait(bp); | |
352 | if (bp->b_flags&B_WANTED) | |
353 | wakeup((caddr_t)bp); | |
354 | bp->b_flags &= B_ERROR; | |
355 | } | |
356 | ||
357 | /* | |
358 | * Queue a tape operation. | |
359 | */ | |
360 | cystrategy(bp) | |
361 | register struct buf *bp; | |
362 | { | |
363 | int cyunit = CYUNIT(bp->b_dev); | |
364 | int s; | |
365 | register struct vba_ctlr *um; | |
366 | register struct buf *dp; | |
367 | ||
368 | /* | |
369 | * Put transfer at end of unit queue | |
370 | */ | |
371 | dp = &cyutab[cyunit]; | |
372 | bp->av_forw = NULL; | |
373 | s = spl8(); | |
374 | /* | |
375 | * Next piece of logic takes care of unusual cases when more than | |
376 | * a full block is required. | |
377 | * The driver reads the tape to a temporary buffer and | |
378 | * then moves the amount needed back to the process. | |
379 | * In this case, the flag NOT1K is set. | |
380 | */ | |
381 | ||
382 | if (commflag == 0) | |
383 | buf_setup(bp, 1); | |
384 | um = cydinfo[cyunit]->ui_mi; | |
385 | if (dp->b_actf == NULL) { | |
386 | dp->b_actf = bp; | |
387 | /* | |
388 | * Transport not already active... | |
389 | * put at end of controller queue. | |
390 | */ | |
391 | dp->b_forw = NULL; | |
392 | if (um->um_tab.b_actf == NULL) | |
393 | um->um_tab.b_actf = dp; | |
394 | else | |
395 | um->um_tab.b_actl->b_forw = dp; | |
396 | um->um_tab.b_actl = dp; | |
397 | } else | |
398 | dp->b_actl->av_forw = bp; | |
399 | dp->b_actl = bp; | |
400 | /* | |
401 | * If the controller is not busy, get | |
402 | * it going. | |
403 | */ | |
404 | if (um->um_tab.b_active == 0) | |
405 | cystart(um); | |
406 | splx(s); | |
407 | } | |
408 | ||
409 | /* | |
410 | * Start activity on a cypher controller. | |
411 | */ | |
412 | cystart(um) | |
413 | register struct vba_ctlr *um; | |
414 | { | |
415 | register struct buf *bp, *dp; | |
416 | register struct tpb *tp; | |
417 | register struct cy_softc *cy; | |
418 | register int phadr; | |
419 | int cyunit, timer; | |
420 | daddr_t blkno; | |
421 | caddr_t ctlr_vaddr; | |
422 | ctlr_vaddr = um->um_addr; | |
423 | /* | |
424 | * Look for an idle transport on the controller. | |
425 | */ | |
426 | loop: | |
427 | if ((dp = um->um_tab.b_actf) == NULL) | |
428 | return; | |
429 | if ((bp = dp->b_actf) == NULL) { | |
430 | um->um_tab.b_actf = dp->b_forw; | |
431 | goto loop; | |
432 | } | |
433 | cyunit = CYUNIT(bp->b_dev); | |
434 | cy = &cy_softc[cyunit]; | |
435 | tp = &tpb[cyunit]; | |
436 | /* | |
437 | * Default is that last command was NOT a write command; | |
438 | * if we do a write command we will notice this in cyintr(). | |
439 | */ | |
440 | cy->cy_lastiow = 0; | |
441 | uncache(&tp->status[0]); | |
442 | uncache(&tp->count); | |
443 | cy->cy_count = TM_SHORT(tp->count); | |
444 | cy->cy_status[0] = tp->status[0]; | |
445 | cy->cy_status[1] = tp->status[1]; | |
446 | if (cy->cy_openf < 0 || | |
447 | (bp->b_command != DRIVE_S) && | |
448 | ((tp->status[0]&CS_OL) != CS_OL)) { | |
449 | /* | |
450 | * Have had a hard error on a non-raw tape | |
451 | * or the tape unit is now unavailable | |
452 | * (e.g. taken off line). | |
453 | */ | |
454 | bp->b_flags |= B_ERROR; | |
455 | goto next; | |
456 | } | |
457 | if (bp == &ccybuf[TMUNIT(bp->b_dev)]) { | |
458 | /* | |
459 | * Execute control operation with the specified count. | |
460 | * Set next state; give 5 minutes to complete | |
461 | * rewind, or 10 seconds per iteration (minimum 60 | |
462 | * seconds and max 5 minutes) to complete other ops. | |
463 | */ | |
464 | if (bp->b_command == REWD_TA) { | |
465 | um->um_tab.b_active = SREW; | |
466 | cy->cy_timo = 5 * 60; | |
467 | } else { | |
468 | um->um_tab.b_active = SCOM; | |
469 | cy->cy_timo = imin(imax(10*(int)bp->b_repcnt, 60), 5*60); | |
470 | } | |
471 | /* | |
472 | * Prepare parameter block for controller | |
473 | */ | |
474 | tp->cmd = bp->b_command; | |
475 | tp->control[0] = (CW_I | (cyunit<<CW_TSs)); | |
476 | if (minor(bp->b_dev)&T_100IPS) | |
477 | tp->control[1] = (CW_100ips | CW_16bits); | |
478 | else tp->control[1] = (CW_25ips | CW_16bits); | |
479 | if (bp->b_command == SP_BACK) { | |
480 | tp->control[1] |= CW_R; | |
481 | tp->cmd = SPACE; | |
482 | tp->rec_over = TM_SHORT((short)bp->b_repcnt); | |
483 | } | |
484 | if (bp->b_command == SP_FORW) | |
485 | tp->rec_over = TM_SHORT((short)bp->b_repcnt); | |
486 | if (bp->b_command == SRFM_BK) { | |
487 | tp->control[1] |= CW_R; | |
488 | tp->cmd = SERH_FM; | |
489 | tp->rec_over = TM_SHORT((short)bp->b_repcnt); | |
490 | } | |
491 | if (bp->b_command == SRFM_FD) | |
492 | tp->rec_over = TM_SHORT((short)bp->b_repcnt); | |
493 | tp->status[0] = tp->status[1] = 0; | |
494 | tp->count = 0; | |
495 | set_pointer((int)&tpb[cyunit], (char *)ccb.pt_tpb); | |
496 | goto dobpcmd; | |
497 | } | |
498 | /* | |
499 | * The following checks handle boundary cases for operation | |
500 | * on non-raw tapes. On raw tapes the initialization of | |
501 | * cy->cy_nxrec by cyphys causes them to be skipped normally | |
502 | */ | |
503 | if (bdbtofsb(bp->b_blkno) > cy->cy_nxrec) { | |
504 | /* | |
505 | * Can't read past known end-of-file. | |
506 | */ | |
507 | bp->b_flags |= B_ERROR; | |
508 | bp->b_error = ENXIO; | |
509 | goto next; | |
510 | } | |
511 | if (bdbtofsb(bp->b_blkno) == cy->cy_nxrec && | |
512 | bp->b_flags&B_READ) { | |
513 | /* | |
514 | * Reading at end of file returns 0 bytes. | |
515 | */ | |
516 | bp->b_resid = bp->b_bcount; | |
517 | clrbuf(bp); | |
518 | goto next; | |
519 | } | |
520 | if ((bp->b_flags&B_READ) == 0) | |
521 | /* | |
522 | * Writing sets EOF | |
523 | */ | |
524 | cy->cy_nxrec = bdbtofsb(bp->b_blkno) + 1; | |
525 | /* | |
526 | * If the data transfer command is in the correct place, | |
527 | * set up the tape parameter block, and start the i/o. | |
528 | */ | |
529 | if ((blkno = cy->cy_blkno) == bdbtofsb(bp->b_blkno)) { | |
530 | um->um_tab.b_active = SIO; | |
531 | cy->cy_timo = 60; /* premature, but should serve */ | |
532 | ||
533 | phadr = get_ioadr(bp, cybuf, CYmap, cyutl); | |
534 | ||
535 | if ( (bp->b_flags & B_READ) == 0) | |
536 | tp->cmd = WRIT_BU; | |
537 | else tp->cmd = READ_BU; | |
538 | tp->control[0] = (CW_I | (cyunit<<CW_TSs)); | |
539 | if (minor(bp->b_dev)&T_100IPS) | |
540 | tp->control[1] = (CW_100ips | CW_16bits); | |
541 | else tp->control[1] = (CW_25ips | CW_16bits); | |
542 | tp->status[0] = tp->status[1] = 0; | |
543 | tp->count = 0; | |
544 | tp->size = TM_SHORT(bp->b_bcount); | |
545 | set_pointer(phadr, (char *)tp->pt_data); | |
546 | set_pointer((int)&tpb[cyunit], (char *)ccb.pt_tpb); | |
547 | goto dobpcmd; | |
548 | } | |
549 | /* | |
550 | * Tape positioned incorrectly; | |
551 | * set to seek forwards or backwards to the correct spot. | |
552 | */ | |
553 | um->um_tab.b_active = SSEEK; | |
554 | tp->cmd = SPACE; | |
555 | tp->control[0] = (CW_I | (cyunit<<CW_TSs)); | |
556 | if (minor(bp->b_dev)&T_100IPS) | |
557 | tp->control[1] = (CW_100ips | CW_16bits); | |
558 | else tp->control[1] = (CW_25ips | CW_16bits); | |
559 | tp->status[0] = tp->status[1] = 0; | |
560 | set_pointer((int)&tpb[cyunit], (char *)ccb.pt_tpb); | |
561 | if (blkno < bdbtofsb(bp->b_blkno)) | |
562 | tp->rec_over = TM_SHORT((short)(blkno - bdbtofsb(bp->b_blkno))); | |
563 | else { | |
564 | tp->rec_over = TM_SHORT((short)(bdbtofsb(bp->b_blkno) - blkno)); | |
565 | tp->control[1] |= CW_R; | |
566 | } | |
567 | cy->cy_timo = imin(imax(10 * (int)TM_SHORT(tp->rec_over), 60), 5 * 60); | |
568 | dobpcmd: | |
569 | /* | |
570 | * Do the command in bp. | |
571 | */ | |
572 | timer = 8000; /* software tolerance for gate open */ | |
573 | uncache(&ccb.gate[0]); | |
574 | while (ccb.gate[0] != GATE_OPEN) { | |
575 | if (--timer == 0) { | |
576 | ccb.ccw[0] = 0x9; /* forget it...... */ | |
577 | TM_RESET(ctlr_vaddr, 0xff); | |
578 | bp->b_flags |= B_ERROR; | |
579 | goto next; | |
580 | } | |
581 | uncache(&ccb.gate[0]); | |
582 | } | |
583 | ccb.ccw[0] = 0x11; /* normal mode */ | |
584 | ccb.gate[0] = GATE_CLOSED; | |
585 | TM_ATTENTION(ctlr_vaddr, 0xff); /* execute! */ | |
586 | return; | |
587 | ||
588 | next: | |
589 | /* | |
590 | * Done with this operation due to error or | |
591 | * the fact that it doesn't do anything. | |
592 | * dequeue the transfer and continue processing this slave. | |
593 | */ | |
594 | um->um_tab.b_errcnt = 0; | |
595 | dp->b_actf = bp->av_forw; | |
596 | iodone(bp); | |
597 | goto loop; | |
598 | } | |
599 | ||
600 | /* | |
601 | * Kept for historical reasons. Probably not neccessary. | |
602 | */ | |
603 | cydgo(um) | |
604 | struct vba_ctlr *um; | |
605 | { | |
606 | } | |
607 | ||
608 | /* | |
609 | * Cy interrupt routine. | |
610 | */ | |
611 | /*ARGSUSED*/ | |
612 | cyintr(ctlr) | |
613 | int ctlr; | |
614 | { | |
615 | struct buf *dp; | |
616 | register struct buf *bp; | |
617 | register struct tpb *tp; | |
618 | register struct vba_ctlr *um = cyminfo[ctlr]; | |
619 | register struct cy_softc *cy; | |
620 | caddr_t ctlr_vaddr; | |
621 | int cyunit; | |
622 | register state; | |
623 | ||
624 | /* | |
625 | * First we clear the interrupt and close the gate. | |
626 | */ | |
627 | ctlr_vaddr = um->um_addr; | |
628 | ccb.ccw[0] = 0x9; /* clear the interrupt */ | |
629 | ccb.gate[0] = GATE_CLOSED; | |
630 | set_pointer((int)&cycool, (char *)ccb.pt_tpb); | |
631 | cycool.cmd = NO_OP; /* no operation */ | |
632 | cycool.control[0] = 0; /* No INTERRUPTS */ | |
633 | cycool.control[1] = 0; | |
634 | TM_ATTENTION(ctlr_vaddr, 0xff); /* cool it ! */ | |
635 | cywait(); | |
636 | /* | |
637 | * Now we can start handling the interrupt. | |
638 | */ | |
639 | pflag = 1; /* set for the probe routine */ | |
640 | if (intenable == 0) return; /* ignore all interrupts */ | |
641 | if ((dp = um->um_tab.b_actf) == NULL) | |
642 | return; | |
643 | bp = dp->b_actf; | |
644 | cyunit = CYUNIT(bp->b_dev); | |
645 | tp = &tpb[cyunit]; | |
646 | cy = &cy_softc[cyunit]; | |
647 | /* | |
648 | * If last command was a rewind, and tape is still | |
649 | * rewinding, wait for the rewind complete interrupt. | |
650 | */ | |
651 | if (um->um_tab.b_active == SREW) { | |
652 | um->um_tab.b_active = SCOM; | |
653 | /* uncache(&tp->status[1]); */ | |
654 | /* if (tp->status[1]&CS_CC != CS_CC) { */ /* not completed */ | |
655 | /* cy->cy_timo = 5*60; */ /* 5 minutes */ | |
656 | /* return; */ | |
657 | /* } */ | |
658 | } | |
659 | /* | |
660 | * An operation completed... update status | |
661 | */ | |
662 | cy->cy_timo = INF; | |
663 | uncache(&tp->count); | |
664 | uncache(&tp->status[0]); | |
665 | cy->cy_count = TM_SHORT(tp->count); | |
666 | cy->cy_status[0] = tp->status[0]; | |
667 | cy->cy_status[1] = tp->status[1]; | |
668 | if ((bp->b_flags & B_READ) == 0) | |
669 | cy->cy_lastiow = 1; | |
670 | state = um->um_tab.b_active; | |
671 | um->um_tab.b_active = 0; | |
672 | /* | |
673 | * Check for errors. | |
674 | */ | |
675 | if (tp->status[1] & CS_ERm) { | |
676 | /* | |
677 | * If we hit the end of the tape file, update our position. | |
678 | */ | |
679 | if (tp->status[0] & CS_FM) | |
680 | { | |
681 | cyseteof(bp); /* set blkno and nxrec */ | |
682 | state = SCOM; | |
683 | goto opdone; | |
684 | } | |
685 | /* If reading raw device and block was too short ignore the | |
686 | * error and let the user program decide what to do. | |
687 | */ | |
688 | if ((tp->status[0] & ER_TOF) && /* (bp->b_flags & B_PHYS) && */ | |
689 | (bp->b_flags & B_READ)) goto cont; | |
690 | cy->cy_openf = -1; /* cause to close */ | |
691 | printf("cy%d: hard error bn %d er=%x\n", cyunit, | |
692 | bp->b_blkno, tp->status[1]&CS_ERm); | |
693 | bp->b_flags |= B_ERROR; | |
694 | goto opdone; | |
695 | } | |
696 | /* | |
697 | * If we were reading block tape and the record | |
698 | * was too long, we consider this an error. | |
699 | */ | |
700 | cont: | |
701 | uncache(&tp->count); | |
702 | uncache(&tp->cmd); | |
703 | if (bp != &rcybuf[TMUNIT(bp->b_dev)] && (tp->cmd == READ_BU) && | |
704 | bp->b_bcount < TM_SHORT(tp->count)) { | |
705 | cy->cy_openf = -1; /* cause to close */ | |
706 | printf("cy%d: error - tape block too long \n", cyunit); | |
707 | bp->b_flags |= B_ERROR; | |
708 | goto opdone; | |
709 | } | |
710 | /* | |
711 | * No errors. | |
712 | * Advance tape control FSM. | |
713 | */ | |
714 | switch (state) { | |
715 | ||
716 | case SIO: | |
717 | /* | |
718 | * Read/write increments tape block number | |
719 | */ | |
720 | cy->cy_blkno++; | |
721 | end_transfer(bp, cybuf, CYmap, cyutl); | |
722 | goto opdone; | |
723 | ||
724 | case SCOM: | |
725 | /* | |
726 | * For forward/backward space record update current position. | |
727 | */ | |
728 | if (bp == &ccybuf[TMUNIT(bp->b_dev)]) | |
729 | switch (bp->b_command) { | |
730 | ||
731 | case SP_FORW: | |
732 | cy->cy_blkno += bp->b_repcnt; | |
733 | break; | |
734 | ||
735 | case SP_BACK: | |
736 | cy->cy_blkno -= bp->b_repcnt; | |
737 | break; | |
738 | } | |
739 | goto opdone; | |
740 | ||
741 | case SSEEK: | |
742 | cy->cy_blkno = bdbtofsb(bp->b_blkno); | |
743 | goto opcont; | |
744 | ||
745 | default: | |
746 | panic("cyintr"); | |
747 | } | |
748 | opdone: | |
749 | /* | |
750 | * Reset error count and remove | |
751 | * from device queue. | |
752 | */ | |
753 | um->um_tab.b_errcnt = 0; | |
754 | dp->b_actf = bp->av_forw; | |
755 | uncache(&tp->count); | |
756 | bp->b_resid = bp->b_bcount - TM_SHORT(tp->count); | |
757 | iodone(bp); | |
758 | /* | |
759 | * Circulate slave to end of controller | |
760 | * queue to give other slaves a chance. | |
761 | */ | |
762 | um->um_tab.b_actf = dp->b_forw; | |
763 | if (dp->b_actf) { | |
764 | dp->b_forw = NULL; | |
765 | if (um->um_tab.b_actf == NULL) | |
766 | um->um_tab.b_actf = dp; | |
767 | else | |
768 | um->um_tab.b_actl->b_forw = dp; | |
769 | um->um_tab.b_actl = dp; | |
770 | } | |
771 | if (um->um_tab.b_actf == 0) | |
772 | return; | |
773 | opcont: | |
774 | cystart(um); | |
775 | } | |
776 | ||
777 | cytimer(dev) | |
778 | int dev; | |
779 | { | |
780 | register struct cy_softc *cy = &cy_softc[CYUNIT(dev)]; | |
781 | int s; | |
782 | ||
783 | if (cy->cy_timo != INF && (cy->cy_timo -= 5) < 0) { | |
784 | printf("cy%d: lost interrupt\n", CYUNIT(dev)); | |
785 | cy->cy_timo = INF; | |
786 | s = spl8(); | |
787 | cyintr(TMUNIT(dev)); | |
788 | splx(s); | |
789 | return; | |
790 | } | |
791 | if (cy->cy_timo != INF ) timeout(cytimer, (caddr_t)dev, 5*hz); | |
792 | } | |
793 | ||
794 | cyseteof(bp) | |
795 | register struct buf *bp; | |
796 | { | |
797 | register int cyunit = CYUNIT(bp->b_dev); | |
798 | register struct cy_softc *cy = &cy_softc[cyunit]; | |
799 | register struct tpb *tp; | |
800 | ||
801 | tp = &tpb[cyunit]; | |
802 | uncache(&tp->rec_over); | |
803 | if (bp == &ccybuf[TMUNIT(bp->b_dev)]) { | |
804 | if (cy->cy_blkno > bdbtofsb(bp->b_blkno)) { | |
805 | /* reversing */ | |
806 | cy->cy_nxrec = bdbtofsb(bp->b_blkno) - (int)TM_SHORT(tp->rec_over); | |
807 | cy->cy_blkno = cy->cy_nxrec; | |
808 | } else { | |
809 | /* spacing forward */ | |
810 | cy->cy_blkno = bdbtofsb(bp->b_blkno) + (int)TM_SHORT(tp->rec_over); | |
811 | cy->cy_nxrec = cy->cy_blkno - 1; | |
812 | } | |
813 | return; | |
814 | } | |
815 | /* eof on read */ | |
816 | cy->cy_nxrec = bdbtofsb(bp->b_blkno); | |
817 | } | |
818 | ||
819 | cyread(dev, uio) | |
820 | dev_t dev; | |
821 | struct uio *uio; | |
822 | { | |
823 | register error; | |
824 | ||
825 | error = cyphys(dev, uio); | |
826 | if (error) | |
827 | return error; | |
828 | while (cybufused) sleep (&cybufused, PRIBIO+1); | |
829 | cybufused = 1; | |
830 | error = physio(cystrategy, &rcybuf[TMUNIT(dev)], dev, B_READ, tminphys, uio); | |
831 | cybufused = 0; | |
832 | wakeup (&cybufused); | |
833 | return error; | |
834 | } | |
835 | ||
836 | cywrite(dev, uio) | |
837 | dev_t dev; | |
838 | struct uio *uio; | |
839 | { | |
840 | register error; | |
841 | ||
842 | error = cyphys(dev, uio); | |
843 | if (error) | |
844 | return error; | |
845 | while (cybufused) sleep (&cybufused, PRIBIO+1); | |
846 | cybufused = 1; | |
847 | error = physio(cystrategy, &rcybuf[TMUNIT(dev)], dev, B_WRITE, tminphys, uio); | |
848 | cybufused = 0; | |
849 | wakeup (&cybufused); | |
850 | return error; | |
851 | } | |
852 | ||
853 | ||
854 | cyreset(uban) | |
855 | int uban; | |
856 | { | |
857 | register struct vba_ctlr *um; | |
858 | register cy0f, cyunit; | |
859 | register struct vba_device *ui; | |
860 | register struct buf *dp; | |
861 | ||
862 | for (cy0f = 0; cy0f < NTM; cy0f++) { | |
863 | if ((um = cyminfo[cy0f]) == 0 || um->um_alive == 0 || | |
864 | um->um_vbanum != uban) | |
865 | continue; | |
866 | printf(" cy%d", cy0f); | |
867 | um->um_tab.b_active = 0; | |
868 | um->um_tab.b_actf = um->um_tab.b_actl = 0; | |
869 | for (cyunit = 0; cyunit < NCY; cyunit++) { | |
870 | if ((ui = cydinfo[cyunit]) == 0 || ui->ui_mi != um || | |
871 | ui->ui_alive == 0) | |
872 | continue; | |
873 | dp = &cyutab[cyunit]; | |
874 | dp->b_active = 0; | |
875 | dp->b_forw = 0; | |
876 | dp->b_command = DRIVE_R; | |
877 | if (um->um_tab.b_actf == NULL) | |
878 | um->um_tab.b_actf = dp; | |
879 | else | |
880 | um->um_tab.b_actl->b_forw = dp; | |
881 | um->um_tab.b_actl = dp; | |
882 | if (cy_softc[cyunit].cy_openf > 0) | |
883 | cy_softc[cyunit].cy_openf = -1; | |
884 | } | |
885 | cystart(um); | |
886 | } | |
887 | } | |
888 | ||
889 | ||
890 | cyioctl(dev, cmd, data, flag) | |
891 | caddr_t data; | |
892 | dev_t dev; | |
893 | { | |
894 | int cyunit = CYUNIT(dev); | |
895 | register struct cy_softc *cy = &cy_softc[cyunit]; | |
896 | register struct buf *bp = &ccybuf[TMUNIT(dev)]; | |
897 | register callcount; | |
898 | int fcount; | |
899 | struct mtop *mtop; | |
900 | struct mtget *mtget; | |
901 | /* we depend of the values and order of the MT codes here */ | |
902 | static cyops[] = | |
903 | {WRIT_FM, SRFM_FD, SRFM_BK, SP_FORW, SP_BACK, REWD_TA, OFF_UNL, NO_OP}; | |
904 | ||
905 | switch (cmd) { | |
906 | case MTIOCTOP: /* tape operation */ | |
907 | mtop = (struct mtop *)data; | |
908 | switch(mtop->mt_op) { | |
909 | case MTWEOF: | |
910 | callcount = mtop->mt_count; | |
911 | fcount = 1; | |
912 | break; | |
913 | case MTFSF: case MTBSF: | |
914 | callcount = mtop->mt_count; | |
915 | fcount = INF; | |
916 | break; | |
917 | case MTFSR: case MTBSR: | |
918 | callcount = 1; | |
919 | fcount = mtop->mt_count; | |
920 | break; | |
921 | case MTREW: case MTOFFL: case MTNOP: | |
922 | callcount = 1; | |
923 | fcount = 1; | |
924 | break; | |
925 | default: | |
926 | return ENXIO; | |
927 | } | |
928 | if (callcount <= 0 || fcount <= 0) | |
929 | return EINVAL; | |
930 | while (--callcount >= 0) { | |
931 | cycommand(dev, cyops[mtop->mt_op], fcount); | |
932 | if ((bp->b_flags&B_ERROR) || cy->cy_status[1]&CS_ERm) | |
933 | break; | |
934 | } | |
935 | return geterror(bp); | |
936 | case MTIOCGET: | |
937 | mtget = (struct mtget *)data; | |
938 | mtget->mt_dsreg = cy->cy_status[0]; | |
939 | mtget->mt_erreg = cy->cy_status[1]; | |
940 | mtget->mt_resid = cy->cy_count; | |
941 | mtget->mt_type = MT_ISCY; | |
942 | break; | |
943 | default: | |
944 | return ENXIO; | |
945 | } | |
946 | return 0; | |
947 | } | |
948 | ||
949 | ||
950 | ||
951 | /* | |
952 | * Check that a raw device exists. | |
953 | * If it does, set up cy_blkno and cy_nxrec | |
954 | * so that the tape will appear positioned correctly. | |
955 | */ | |
956 | cyphys(dev, uio) | |
957 | dev_t dev; | |
958 | struct uio *uio; | |
959 | { | |
960 | register int cyunit = CYUNIT(dev); | |
961 | register daddr_t a; | |
962 | register struct cy_softc *cy; | |
963 | register struct vba_device *ui; | |
964 | ||
965 | if (cyunit >= NCY || (ui=cydinfo[cyunit]) == 0 || ui->ui_alive == 0) | |
966 | return ENXIO; | |
967 | cy = &cy_softc[cyunit]; | |
968 | a = bdbtofsb(uio->uio_offset >> PGSHIFT); | |
969 | cy->cy_blkno = a; | |
970 | cy->cy_nxrec = a + 1; | |
971 | return 0; | |
972 | } | |
973 | ||
974 | /* | |
975 | * Set a TAPEMASTER pointer (first parameter), into the | |
976 | * 4 bytes array pointed by the second parameter. | |
977 | */ | |
978 | set_pointer(pointer, dest) | |
979 | int pointer; | |
980 | char * dest; | |
981 | { | |
982 | *dest++ = pointer & 0xff; /* low byte - offset */ | |
983 | *dest++ = (pointer >> 8) & 0xff; /* high byte - offset */ | |
984 | *dest++ = 0; | |
985 | *dest = (pointer & 0xf0000) >> 12; /* base */ | |
986 | } | |
987 | ||
988 | cydump(dev) | |
989 | dev_t dev; | |
990 | { | |
991 | register struct vba_device *ui; | |
992 | register struct tpb *tp; | |
993 | int cyunit = CYUNIT(dev); | |
994 | int blk, num; | |
995 | int start; | |
996 | ||
997 | start = 0x800; | |
998 | num = maxfree; | |
999 | tp = &tpb[cyunit]; | |
1000 | if (cyunit >= NCY || (ui=cydinfo[cyunit]) == 0 || ui->ui_alive == 0) | |
1001 | return(ENXIO); | |
1002 | if (cywait) return(EFAULT); | |
1003 | while (num > 0) { | |
1004 | blk = num > TBUFSIZ ? TBUFSIZ : num; | |
1005 | bcopy(start*NBPG, cybuf, blk*NBPG); | |
1006 | tp->cmd = WRIT_BU; | |
1007 | tp->control[0] = cyunit<<CW_TSs; | |
1008 | tp->control[1] = (CW_100ips | CW_16bits); | |
1009 | tp->status[0] = tp->status[1] = 0; | |
1010 | tp->size = TM_SHORT(blk*NBPG); | |
1011 | set_pointer((int)cybuf, (char *)tp->pt_data); | |
1012 | set_pointer((int)&tpb[cyunit], (char *)ccb.pt_tpb); | |
1013 | ccb.gate[0] = GATE_CLOSED; | |
1014 | TM_ATTENTION(cyaddr, 0xff); /* execute! */ | |
1015 | start += blk; | |
1016 | num -= blk; | |
1017 | if (cywait) return(EFAULT); | |
1018 | uncache(&tp->status[1]); | |
1019 | if (tp->status[1]&CS_ERm) /* error */ | |
1020 | return (EIO); | |
1021 | } | |
1022 | cyeof(tp, cyunit); | |
1023 | if (cywait) return(EFAULT); | |
1024 | cyeof(tp, cyunit); | |
1025 | if (cywait) return(EFAULT); | |
1026 | uncache(&tp->status[1]); | |
1027 | if (tp->status[1]&CS_ERm) /* error */ | |
1028 | return (EIO); | |
1029 | cyrewind(tp, cyunit); | |
1030 | return (0); | |
1031 | } | |
1032 | ||
1033 | cywait() | |
1034 | { | |
1035 | register cnt; | |
1036 | ||
1037 | cnt = 5000; /* 5 seconds timeout */ | |
1038 | do { | |
1039 | --cnt; | |
1040 | DELAY(1000); | |
1041 | uncache(&ccb.gate[0]); | |
1042 | } | |
1043 | while (cnt>0 && ccb.gate[0] == GATE_CLOSED); | |
1044 | if (cnt == 0) return(1); /* timeout */ | |
1045 | else return(0); | |
1046 | } | |
1047 | ||
1048 | cyeof(tp, unit) | |
1049 | register struct tpb *tp; | |
1050 | int unit; | |
1051 | { | |
1052 | tp->cmd = WRIT_FM; | |
1053 | tp->control[0] = unit<<CW_TSs; | |
1054 | tp->control[1] = (CW_100ips | CW_16bits); | |
1055 | tp->status[0] = tp->status[1] = 0; | |
1056 | tp->rec_over = TM_SHORT(1); | |
1057 | set_pointer((int)&tpb[unit], (char *)ccb.pt_tpb); | |
1058 | ccb.gate[0] = GATE_CLOSED; | |
1059 | TM_ATTENTION(cyaddr, 0xff); /* execute! */ | |
1060 | } | |
1061 | ||
1062 | ||
1063 | cyrewind(tp, unit) | |
1064 | register struct tpb *tp; | |
1065 | int unit; | |
1066 | { | |
1067 | tp->cmd = REWD_TA; | |
1068 | tp->control[0] = unit<<CW_TSs; | |
1069 | tp->control[1] = (CW_100ips | CW_16bits); | |
1070 | tp->status[0] = tp->status[1] = 0; | |
1071 | set_pointer((int)&tpb[unit], (char *)ccb.pt_tpb); | |
1072 | ccb.gate[0] = GATE_CLOSED; | |
1073 | TM_ATTENTION(cyaddr, 0xff); /* execute! */ | |
1074 | } | |
1075 | ||
1076 | unsigned | |
1077 | tminphys(bp) | |
1078 | register struct buf *bp; | |
1079 | { | |
1080 | ||
1081 | if (bp->b_bcount > sizeof cybuf) | |
1082 | bp->b_bcount = sizeof cybuf; | |
1083 | } | |
1084 | #endif |