Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * drivers/s390/char/tape_std.c | |
3 | * standard tape device functions for ibm tapes. | |
4 | * | |
5 | * S390 and zSeries version | |
6 | * Copyright (C) 2001,2002 IBM Deutschland Entwicklung GmbH, IBM Corporation | |
7 | * Author(s): Carsten Otte <cotte@de.ibm.com> | |
8 | * Michael Holzheu <holzheu@de.ibm.com> | |
9 | * Tuan Ngo-Anh <ngoanh@de.ibm.com> | |
10 | * Martin Schwidefsky <schwidefsky@de.ibm.com> | |
11 | * Stefan Bader <shbader@de.ibm.com> | |
12 | */ | |
13 | ||
1da177e4 LT |
14 | #include <linux/stddef.h> |
15 | #include <linux/kernel.h> | |
16 | #include <linux/bio.h> | |
17 | #include <linux/timer.h> | |
18 | ||
19 | #include <asm/types.h> | |
20 | #include <asm/idals.h> | |
21 | #include <asm/ebcdic.h> | |
22 | #include <asm/tape390.h> | |
23 | ||
24 | #define TAPE_DBF_AREA tape_core_dbf | |
25 | ||
26 | #include "tape.h" | |
27 | #include "tape_std.h" | |
28 | ||
1da177e4 LT |
29 | /* |
30 | * tape_std_assign | |
31 | */ | |
32 | static void | |
33 | tape_std_assign_timeout(unsigned long data) | |
34 | { | |
35 | struct tape_request * request; | |
36 | struct tape_device * device; | |
5f384338 | 37 | int rc; |
1da177e4 LT |
38 | |
39 | request = (struct tape_request *) data; | |
6aa0d3a9 SG |
40 | device = request->device; |
41 | BUG_ON(!device); | |
1da177e4 | 42 | |
5f384338 | 43 | DBF_EVENT(3, "%08x: Assignment timeout. Device busy.\n", |
1da177e4 | 44 | device->cdev_id); |
5f384338 MH |
45 | rc = tape_cancel_io(device, request); |
46 | if(rc) | |
ab640db0 | 47 | DBF_EVENT(3, "(%s): Assign timeout: Cancel failed with rc = %i\n", |
2a0217d5 | 48 | dev_name(&device->cdev->dev), rc); |
1da177e4 LT |
49 | } |
50 | ||
51 | int | |
52 | tape_std_assign(struct tape_device *device) | |
53 | { | |
54 | int rc; | |
55 | struct timer_list timeout; | |
56 | struct tape_request *request; | |
57 | ||
58 | request = tape_alloc_request(2, 11); | |
59 | if (IS_ERR(request)) | |
60 | return PTR_ERR(request); | |
61 | ||
62 | request->op = TO_ASSIGN; | |
63 | tape_ccw_cc(request->cpaddr, ASSIGN, 11, request->cpdata); | |
64 | tape_ccw_end(request->cpaddr + 1, NOP, 0, NULL); | |
65 | ||
66 | /* | |
67 | * The assign command sometimes blocks if the device is assigned | |
68 | * to another host (actually this shouldn't happen but it does). | |
69 | * So we set up a timeout for this call. | |
70 | */ | |
6292b9ef | 71 | init_timer_on_stack(&timeout); |
1da177e4 LT |
72 | timeout.function = tape_std_assign_timeout; |
73 | timeout.data = (unsigned long) request; | |
74 | timeout.expires = jiffies + 2 * HZ; | |
75 | add_timer(&timeout); | |
76 | ||
77 | rc = tape_do_io_interruptible(device, request); | |
78 | ||
79 | del_timer(&timeout); | |
80 | ||
81 | if (rc != 0) { | |
1da177e4 LT |
82 | DBF_EVENT(3, "%08x: assign failed - device might be busy\n", |
83 | device->cdev_id); | |
84 | } else { | |
85 | DBF_EVENT(3, "%08x: Tape assigned\n", device->cdev_id); | |
86 | } | |
87 | tape_free_request(request); | |
88 | return rc; | |
89 | } | |
90 | ||
91 | /* | |
92 | * tape_std_unassign | |
93 | */ | |
94 | int | |
95 | tape_std_unassign (struct tape_device *device) | |
96 | { | |
97 | int rc; | |
98 | struct tape_request *request; | |
99 | ||
100 | if (device->tape_state == TS_NOT_OPER) { | |
101 | DBF_EVENT(3, "(%08x): Can't unassign device\n", | |
102 | device->cdev_id); | |
1da177e4 LT |
103 | return -EIO; |
104 | } | |
105 | ||
106 | request = tape_alloc_request(2, 11); | |
107 | if (IS_ERR(request)) | |
108 | return PTR_ERR(request); | |
109 | ||
110 | request->op = TO_UNASSIGN; | |
111 | tape_ccw_cc(request->cpaddr, UNASSIGN, 11, request->cpdata); | |
112 | tape_ccw_end(request->cpaddr + 1, NOP, 0, NULL); | |
113 | ||
114 | if ((rc = tape_do_io(device, request)) != 0) { | |
115 | DBF_EVENT(3, "%08x: Unassign failed\n", device->cdev_id); | |
1da177e4 LT |
116 | } else { |
117 | DBF_EVENT(3, "%08x: Tape unassigned\n", device->cdev_id); | |
118 | } | |
119 | tape_free_request(request); | |
120 | return rc; | |
121 | } | |
122 | ||
123 | /* | |
124 | * TAPE390_DISPLAY: Show a string on the tape display. | |
125 | */ | |
126 | int | |
127 | tape_std_display(struct tape_device *device, struct display_struct *disp) | |
128 | { | |
129 | struct tape_request *request; | |
130 | int rc; | |
131 | ||
132 | request = tape_alloc_request(2, 17); | |
133 | if (IS_ERR(request)) { | |
134 | DBF_EVENT(3, "TAPE: load display failed\n"); | |
135 | return PTR_ERR(request); | |
136 | } | |
137 | request->op = TO_DIS; | |
138 | ||
139 | *(unsigned char *) request->cpdata = disp->cntrl; | |
140 | DBF_EVENT(5, "TAPE: display cntrl=%04x\n", disp->cntrl); | |
141 | memcpy(((unsigned char *) request->cpdata) + 1, disp->message1, 8); | |
142 | memcpy(((unsigned char *) request->cpdata) + 9, disp->message2, 8); | |
143 | ASCEBC(((unsigned char*) request->cpdata) + 1, 16); | |
144 | ||
145 | tape_ccw_cc(request->cpaddr, LOAD_DISPLAY, 17, request->cpdata); | |
146 | tape_ccw_end(request->cpaddr + 1, NOP, 0, NULL); | |
147 | ||
148 | rc = tape_do_io_interruptible(device, request); | |
149 | tape_free_request(request); | |
150 | return rc; | |
151 | } | |
152 | ||
153 | /* | |
154 | * Read block id. | |
155 | */ | |
156 | int | |
157 | tape_std_read_block_id(struct tape_device *device, __u64 *id) | |
158 | { | |
159 | struct tape_request *request; | |
160 | int rc; | |
161 | ||
162 | request = tape_alloc_request(3, 8); | |
163 | if (IS_ERR(request)) | |
164 | return PTR_ERR(request); | |
165 | request->op = TO_RBI; | |
166 | /* setup ccws */ | |
167 | tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1, device->modeset_byte); | |
168 | tape_ccw_cc(request->cpaddr + 1, READ_BLOCK_ID, 8, request->cpdata); | |
169 | tape_ccw_end(request->cpaddr + 2, NOP, 0, NULL); | |
170 | /* execute it */ | |
171 | rc = tape_do_io(device, request); | |
172 | if (rc == 0) | |
173 | /* Get result from read buffer. */ | |
174 | *id = *(__u64 *) request->cpdata; | |
175 | tape_free_request(request); | |
176 | return rc; | |
177 | } | |
178 | ||
179 | int | |
180 | tape_std_terminate_write(struct tape_device *device) | |
181 | { | |
182 | int rc; | |
183 | ||
184 | if(device->required_tapemarks == 0) | |
185 | return 0; | |
186 | ||
187 | DBF_LH(5, "tape%d: terminate write %dxEOF\n", device->first_minor, | |
188 | device->required_tapemarks); | |
189 | ||
190 | rc = tape_mtop(device, MTWEOF, device->required_tapemarks); | |
191 | if (rc) | |
192 | return rc; | |
193 | ||
194 | device->required_tapemarks = 0; | |
195 | return tape_mtop(device, MTBSR, 1); | |
196 | } | |
197 | ||
198 | /* | |
199 | * MTLOAD: Loads the tape. | |
200 | * The default implementation just wait until the tape medium state changes | |
201 | * to MS_LOADED. | |
202 | */ | |
203 | int | |
204 | tape_std_mtload(struct tape_device *device, int count) | |
205 | { | |
206 | return wait_event_interruptible(device->state_change_wq, | |
207 | (device->medium_state == MS_LOADED)); | |
208 | } | |
209 | ||
210 | /* | |
211 | * MTSETBLK: Set block size. | |
212 | */ | |
213 | int | |
214 | tape_std_mtsetblk(struct tape_device *device, int count) | |
215 | { | |
216 | struct idal_buffer *new; | |
217 | ||
218 | DBF_LH(6, "tape_std_mtsetblk(%d)\n", count); | |
219 | if (count <= 0) { | |
220 | /* | |
221 | * Just set block_size to 0. tapechar_read/tapechar_write | |
222 | * will realloc the idal buffer if a bigger one than the | |
223 | * current is needed. | |
224 | */ | |
225 | device->char_data.block_size = 0; | |
226 | return 0; | |
227 | } | |
228 | if (device->char_data.idal_buf != NULL && | |
229 | device->char_data.idal_buf->size == count) | |
230 | /* We already have a idal buffer of that size. */ | |
231 | return 0; | |
232 | ||
233 | if (count > MAX_BLOCKSIZE) { | |
234 | DBF_EVENT(3, "Invalid block size (%d > %d) given.\n", | |
235 | count, MAX_BLOCKSIZE); | |
1da177e4 LT |
236 | return -EINVAL; |
237 | } | |
238 | ||
239 | /* Allocate a new idal buffer. */ | |
240 | new = idal_buffer_alloc(count, 0); | |
0983e568 | 241 | if (IS_ERR(new)) |
1da177e4 LT |
242 | return -ENOMEM; |
243 | if (device->char_data.idal_buf != NULL) | |
244 | idal_buffer_free(device->char_data.idal_buf); | |
245 | device->char_data.idal_buf = new; | |
246 | device->char_data.block_size = count; | |
247 | ||
248 | DBF_LH(6, "new blocksize is %d\n", device->char_data.block_size); | |
249 | ||
250 | return 0; | |
251 | } | |
252 | ||
253 | /* | |
254 | * MTRESET: Set block size to 0. | |
255 | */ | |
256 | int | |
257 | tape_std_mtreset(struct tape_device *device, int count) | |
258 | { | |
259 | DBF_EVENT(6, "TCHAR:devreset:\n"); | |
260 | device->char_data.block_size = 0; | |
261 | return 0; | |
262 | } | |
263 | ||
264 | /* | |
265 | * MTFSF: Forward space over 'count' file marks. The tape is positioned | |
266 | * at the EOT (End of Tape) side of the file mark. | |
267 | */ | |
268 | int | |
269 | tape_std_mtfsf(struct tape_device *device, int mt_count) | |
270 | { | |
271 | struct tape_request *request; | |
272 | struct ccw1 *ccw; | |
273 | ||
274 | request = tape_alloc_request(mt_count + 2, 0); | |
275 | if (IS_ERR(request)) | |
276 | return PTR_ERR(request); | |
277 | request->op = TO_FSF; | |
278 | /* setup ccws */ | |
279 | ccw = tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1, | |
280 | device->modeset_byte); | |
281 | ccw = tape_ccw_repeat(ccw, FORSPACEFILE, mt_count); | |
282 | ccw = tape_ccw_end(ccw, NOP, 0, NULL); | |
283 | ||
284 | /* execute it */ | |
285 | return tape_do_io_free(device, request); | |
286 | } | |
287 | ||
288 | /* | |
289 | * MTFSR: Forward space over 'count' tape blocks (blocksize is set | |
290 | * via MTSETBLK. | |
291 | */ | |
292 | int | |
293 | tape_std_mtfsr(struct tape_device *device, int mt_count) | |
294 | { | |
295 | struct tape_request *request; | |
296 | struct ccw1 *ccw; | |
297 | int rc; | |
298 | ||
299 | request = tape_alloc_request(mt_count + 2, 0); | |
300 | if (IS_ERR(request)) | |
301 | return PTR_ERR(request); | |
302 | request->op = TO_FSB; | |
303 | /* setup ccws */ | |
304 | ccw = tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1, | |
305 | device->modeset_byte); | |
306 | ccw = tape_ccw_repeat(ccw, FORSPACEBLOCK, mt_count); | |
307 | ccw = tape_ccw_end(ccw, NOP, 0, NULL); | |
308 | ||
309 | /* execute it */ | |
310 | rc = tape_do_io(device, request); | |
311 | if (rc == 0 && request->rescnt > 0) { | |
312 | DBF_LH(3, "FSR over tapemark\n"); | |
313 | rc = 1; | |
314 | } | |
315 | tape_free_request(request); | |
316 | ||
317 | return rc; | |
318 | } | |
319 | ||
320 | /* | |
321 | * MTBSR: Backward space over 'count' tape blocks. | |
322 | * (blocksize is set via MTSETBLK. | |
323 | */ | |
324 | int | |
325 | tape_std_mtbsr(struct tape_device *device, int mt_count) | |
326 | { | |
327 | struct tape_request *request; | |
328 | struct ccw1 *ccw; | |
329 | int rc; | |
330 | ||
331 | request = tape_alloc_request(mt_count + 2, 0); | |
332 | if (IS_ERR(request)) | |
333 | return PTR_ERR(request); | |
334 | request->op = TO_BSB; | |
335 | /* setup ccws */ | |
336 | ccw = tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1, | |
337 | device->modeset_byte); | |
338 | ccw = tape_ccw_repeat(ccw, BACKSPACEBLOCK, mt_count); | |
339 | ccw = tape_ccw_end(ccw, NOP, 0, NULL); | |
340 | ||
341 | /* execute it */ | |
342 | rc = tape_do_io(device, request); | |
343 | if (rc == 0 && request->rescnt > 0) { | |
344 | DBF_LH(3, "BSR over tapemark\n"); | |
345 | rc = 1; | |
346 | } | |
347 | tape_free_request(request); | |
348 | ||
349 | return rc; | |
350 | } | |
351 | ||
352 | /* | |
353 | * MTWEOF: Write 'count' file marks at the current position. | |
354 | */ | |
355 | int | |
356 | tape_std_mtweof(struct tape_device *device, int mt_count) | |
357 | { | |
358 | struct tape_request *request; | |
359 | struct ccw1 *ccw; | |
360 | ||
361 | request = tape_alloc_request(mt_count + 2, 0); | |
362 | if (IS_ERR(request)) | |
363 | return PTR_ERR(request); | |
364 | request->op = TO_WTM; | |
365 | /* setup ccws */ | |
366 | ccw = tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1, | |
367 | device->modeset_byte); | |
368 | ccw = tape_ccw_repeat(ccw, WRITETAPEMARK, mt_count); | |
369 | ccw = tape_ccw_end(ccw, NOP, 0, NULL); | |
370 | ||
371 | /* execute it */ | |
372 | return tape_do_io_free(device, request); | |
373 | } | |
374 | ||
375 | /* | |
376 | * MTBSFM: Backward space over 'count' file marks. | |
377 | * The tape is positioned at the BOT (Begin Of Tape) side of the | |
378 | * last skipped file mark. | |
379 | */ | |
380 | int | |
381 | tape_std_mtbsfm(struct tape_device *device, int mt_count) | |
382 | { | |
383 | struct tape_request *request; | |
384 | struct ccw1 *ccw; | |
385 | ||
386 | request = tape_alloc_request(mt_count + 2, 0); | |
387 | if (IS_ERR(request)) | |
388 | return PTR_ERR(request); | |
389 | request->op = TO_BSF; | |
390 | /* setup ccws */ | |
391 | ccw = tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1, | |
392 | device->modeset_byte); | |
393 | ccw = tape_ccw_repeat(ccw, BACKSPACEFILE, mt_count); | |
394 | ccw = tape_ccw_end(ccw, NOP, 0, NULL); | |
395 | ||
396 | /* execute it */ | |
397 | return tape_do_io_free(device, request); | |
398 | } | |
399 | ||
400 | /* | |
401 | * MTBSF: Backward space over 'count' file marks. The tape is positioned at | |
402 | * the EOT (End of Tape) side of the last skipped file mark. | |
403 | */ | |
404 | int | |
405 | tape_std_mtbsf(struct tape_device *device, int mt_count) | |
406 | { | |
407 | struct tape_request *request; | |
408 | struct ccw1 *ccw; | |
409 | int rc; | |
410 | ||
411 | request = tape_alloc_request(mt_count + 2, 0); | |
412 | if (IS_ERR(request)) | |
413 | return PTR_ERR(request); | |
414 | request->op = TO_BSF; | |
415 | /* setup ccws */ | |
416 | ccw = tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1, | |
417 | device->modeset_byte); | |
418 | ccw = tape_ccw_repeat(ccw, BACKSPACEFILE, mt_count); | |
419 | ccw = tape_ccw_end(ccw, NOP, 0, NULL); | |
420 | /* execute it */ | |
421 | rc = tape_do_io_free(device, request); | |
422 | if (rc == 0) { | |
423 | rc = tape_mtop(device, MTFSR, 1); | |
424 | if (rc > 0) | |
425 | rc = 0; | |
426 | } | |
427 | return rc; | |
428 | } | |
429 | ||
430 | /* | |
431 | * MTFSFM: Forward space over 'count' file marks. | |
432 | * The tape is positioned at the BOT (Begin Of Tape) side | |
433 | * of the last skipped file mark. | |
434 | */ | |
435 | int | |
436 | tape_std_mtfsfm(struct tape_device *device, int mt_count) | |
437 | { | |
438 | struct tape_request *request; | |
439 | struct ccw1 *ccw; | |
440 | int rc; | |
441 | ||
442 | request = tape_alloc_request(mt_count + 2, 0); | |
443 | if (IS_ERR(request)) | |
444 | return PTR_ERR(request); | |
445 | request->op = TO_FSF; | |
446 | /* setup ccws */ | |
447 | ccw = tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1, | |
448 | device->modeset_byte); | |
449 | ccw = tape_ccw_repeat(ccw, FORSPACEFILE, mt_count); | |
450 | ccw = tape_ccw_end(ccw, NOP, 0, NULL); | |
451 | /* execute it */ | |
452 | rc = tape_do_io_free(device, request); | |
453 | if (rc == 0) { | |
454 | rc = tape_mtop(device, MTBSR, 1); | |
455 | if (rc > 0) | |
456 | rc = 0; | |
457 | } | |
458 | ||
459 | return rc; | |
460 | } | |
461 | ||
462 | /* | |
463 | * MTREW: Rewind the tape. | |
464 | */ | |
465 | int | |
466 | tape_std_mtrew(struct tape_device *device, int mt_count) | |
467 | { | |
468 | struct tape_request *request; | |
469 | ||
470 | request = tape_alloc_request(3, 0); | |
471 | if (IS_ERR(request)) | |
472 | return PTR_ERR(request); | |
473 | request->op = TO_REW; | |
474 | /* setup ccws */ | |
475 | tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1, | |
476 | device->modeset_byte); | |
477 | tape_ccw_cc(request->cpaddr + 1, REWIND, 0, NULL); | |
478 | tape_ccw_end(request->cpaddr + 2, NOP, 0, NULL); | |
479 | ||
480 | /* execute it */ | |
481 | return tape_do_io_free(device, request); | |
482 | } | |
483 | ||
484 | /* | |
485 | * MTOFFL: Rewind the tape and put the drive off-line. | |
486 | * Implement 'rewind unload' | |
487 | */ | |
488 | int | |
489 | tape_std_mtoffl(struct tape_device *device, int mt_count) | |
490 | { | |
491 | struct tape_request *request; | |
492 | ||
493 | request = tape_alloc_request(3, 0); | |
494 | if (IS_ERR(request)) | |
495 | return PTR_ERR(request); | |
496 | request->op = TO_RUN; | |
497 | /* setup ccws */ | |
498 | tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1, device->modeset_byte); | |
499 | tape_ccw_cc(request->cpaddr + 1, REWIND_UNLOAD, 0, NULL); | |
500 | tape_ccw_end(request->cpaddr + 2, NOP, 0, NULL); | |
501 | ||
502 | /* execute it */ | |
503 | return tape_do_io_free(device, request); | |
504 | } | |
505 | ||
506 | /* | |
507 | * MTNOP: 'No operation'. | |
508 | */ | |
509 | int | |
510 | tape_std_mtnop(struct tape_device *device, int mt_count) | |
511 | { | |
512 | struct tape_request *request; | |
513 | ||
514 | request = tape_alloc_request(2, 0); | |
515 | if (IS_ERR(request)) | |
516 | return PTR_ERR(request); | |
517 | request->op = TO_NOP; | |
518 | /* setup ccws */ | |
519 | tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1, device->modeset_byte); | |
520 | tape_ccw_end(request->cpaddr + 1, NOP, 0, NULL); | |
521 | /* execute it */ | |
522 | return tape_do_io_free(device, request); | |
523 | } | |
524 | ||
525 | /* | |
526 | * MTEOM: positions at the end of the portion of the tape already used | |
527 | * for recordind data. MTEOM positions after the last file mark, ready for | |
528 | * appending another file. | |
529 | */ | |
530 | int | |
531 | tape_std_mteom(struct tape_device *device, int mt_count) | |
532 | { | |
533 | int rc; | |
534 | ||
535 | /* | |
536 | * Seek from the beginning of tape (rewind). | |
537 | */ | |
538 | if ((rc = tape_mtop(device, MTREW, 1)) < 0) | |
539 | return rc; | |
540 | ||
541 | /* | |
542 | * The logical end of volume is given by two sewuential tapemarks. | |
543 | * Look for this by skipping to the next file (over one tapemark) | |
544 | * and then test for another one (fsr returns 1 if a tapemark was | |
545 | * encountered). | |
546 | */ | |
547 | do { | |
548 | if ((rc = tape_mtop(device, MTFSF, 1)) < 0) | |
549 | return rc; | |
550 | if ((rc = tape_mtop(device, MTFSR, 1)) < 0) | |
551 | return rc; | |
552 | } while (rc == 0); | |
553 | ||
554 | return tape_mtop(device, MTBSR, 1); | |
555 | } | |
556 | ||
557 | /* | |
558 | * MTRETEN: Retension the tape, i.e. forward space to end of tape and rewind. | |
559 | */ | |
560 | int | |
561 | tape_std_mtreten(struct tape_device *device, int mt_count) | |
562 | { | |
563 | struct tape_request *request; | |
564 | int rc; | |
565 | ||
566 | request = tape_alloc_request(4, 0); | |
567 | if (IS_ERR(request)) | |
568 | return PTR_ERR(request); | |
569 | request->op = TO_FSF; | |
570 | /* setup ccws */ | |
571 | tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1, device->modeset_byte); | |
572 | tape_ccw_cc(request->cpaddr + 1,FORSPACEFILE, 0, NULL); | |
573 | tape_ccw_cc(request->cpaddr + 2, NOP, 0, NULL); | |
574 | tape_ccw_end(request->cpaddr + 3, CCW_CMD_TIC, 0, request->cpaddr); | |
575 | /* execute it, MTRETEN rc gets ignored */ | |
576 | rc = tape_do_io_interruptible(device, request); | |
577 | tape_free_request(request); | |
578 | return tape_mtop(device, MTREW, 1); | |
579 | } | |
580 | ||
581 | /* | |
582 | * MTERASE: erases the tape. | |
583 | */ | |
584 | int | |
585 | tape_std_mterase(struct tape_device *device, int mt_count) | |
586 | { | |
587 | struct tape_request *request; | |
588 | ||
589 | request = tape_alloc_request(6, 0); | |
590 | if (IS_ERR(request)) | |
591 | return PTR_ERR(request); | |
592 | request->op = TO_DSE; | |
593 | /* setup ccws */ | |
594 | tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1, device->modeset_byte); | |
595 | tape_ccw_cc(request->cpaddr + 1, REWIND, 0, NULL); | |
596 | tape_ccw_cc(request->cpaddr + 2, ERASE_GAP, 0, NULL); | |
597 | tape_ccw_cc(request->cpaddr + 3, DATA_SEC_ERASE, 0, NULL); | |
598 | tape_ccw_cc(request->cpaddr + 4, REWIND, 0, NULL); | |
599 | tape_ccw_end(request->cpaddr + 5, NOP, 0, NULL); | |
600 | ||
601 | /* execute it */ | |
602 | return tape_do_io_free(device, request); | |
603 | } | |
604 | ||
605 | /* | |
606 | * MTUNLOAD: Rewind the tape and unload it. | |
607 | */ | |
608 | int | |
609 | tape_std_mtunload(struct tape_device *device, int mt_count) | |
610 | { | |
611 | return tape_mtop(device, MTOFFL, mt_count); | |
612 | } | |
613 | ||
614 | /* | |
615 | * MTCOMPRESSION: used to enable compression. | |
616 | * Sets the IDRC on/off. | |
617 | */ | |
618 | int | |
619 | tape_std_mtcompression(struct tape_device *device, int mt_count) | |
620 | { | |
621 | struct tape_request *request; | |
622 | ||
623 | if (mt_count < 0 || mt_count > 1) { | |
624 | DBF_EXCEPTION(6, "xcom parm\n"); | |
1da177e4 LT |
625 | return -EINVAL; |
626 | } | |
627 | request = tape_alloc_request(2, 0); | |
628 | if (IS_ERR(request)) | |
629 | return PTR_ERR(request); | |
630 | request->op = TO_NOP; | |
631 | /* setup ccws */ | |
4925c7e2 MH |
632 | if (mt_count == 0) |
633 | *device->modeset_byte &= ~0x08; | |
634 | else | |
635 | *device->modeset_byte |= 0x08; | |
1da177e4 LT |
636 | tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1, device->modeset_byte); |
637 | tape_ccw_end(request->cpaddr + 1, NOP, 0, NULL); | |
638 | /* execute it */ | |
639 | return tape_do_io_free(device, request); | |
640 | } | |
641 | ||
642 | /* | |
643 | * Read Block | |
644 | */ | |
645 | struct tape_request * | |
646 | tape_std_read_block(struct tape_device *device, size_t count) | |
647 | { | |
648 | struct tape_request *request; | |
649 | ||
650 | /* | |
651 | * We have to alloc 4 ccws in order to be able to transform request | |
652 | * into a read backward request in error case. | |
653 | */ | |
654 | request = tape_alloc_request(4, 0); | |
655 | if (IS_ERR(request)) { | |
656 | DBF_EXCEPTION(6, "xrbl fail"); | |
657 | return request; | |
658 | } | |
659 | request->op = TO_RFO; | |
660 | tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1, device->modeset_byte); | |
661 | tape_ccw_end_idal(request->cpaddr + 1, READ_FORWARD, | |
662 | device->char_data.idal_buf); | |
663 | DBF_EVENT(6, "xrbl ccwg\n"); | |
664 | return request; | |
665 | } | |
666 | ||
667 | /* | |
668 | * Read Block backward transformation function. | |
669 | */ | |
670 | void | |
671 | tape_std_read_backward(struct tape_device *device, struct tape_request *request) | |
672 | { | |
673 | /* | |
674 | * We have allocated 4 ccws in tape_std_read, so we can now | |
675 | * transform the request to a read backward, followed by a | |
676 | * forward space block. | |
677 | */ | |
678 | request->op = TO_RBA; | |
679 | tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1, device->modeset_byte); | |
680 | tape_ccw_cc_idal(request->cpaddr + 1, READ_BACKWARD, | |
681 | device->char_data.idal_buf); | |
682 | tape_ccw_cc(request->cpaddr + 2, FORSPACEBLOCK, 0, NULL); | |
683 | tape_ccw_end(request->cpaddr + 3, NOP, 0, NULL); | |
684 | DBF_EVENT(6, "xrop ccwg");} | |
685 | ||
686 | /* | |
687 | * Write Block | |
688 | */ | |
689 | struct tape_request * | |
690 | tape_std_write_block(struct tape_device *device, size_t count) | |
691 | { | |
692 | struct tape_request *request; | |
693 | ||
694 | request = tape_alloc_request(2, 0); | |
695 | if (IS_ERR(request)) { | |
696 | DBF_EXCEPTION(6, "xwbl fail\n"); | |
697 | return request; | |
698 | } | |
699 | request->op = TO_WRI; | |
700 | tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1, device->modeset_byte); | |
701 | tape_ccw_end_idal(request->cpaddr + 1, WRITE_CMD, | |
702 | device->char_data.idal_buf); | |
703 | DBF_EVENT(6, "xwbl ccwg\n"); | |
704 | return request; | |
705 | } | |
706 | ||
707 | /* | |
708 | * This routine is called by frontend after an ENOSP on write | |
709 | */ | |
710 | void | |
711 | tape_std_process_eov(struct tape_device *device) | |
712 | { | |
713 | /* | |
714 | * End of volume: We have to backspace the last written record, then | |
715 | * we TRY to write a tapemark and then backspace over the written TM | |
716 | */ | |
717 | if (tape_mtop(device, MTBSR, 1) == 0 && | |
718 | tape_mtop(device, MTWEOF, 1) == 0) { | |
719 | tape_mtop(device, MTBSR, 1); | |
720 | } | |
721 | } | |
722 | ||
723 | EXPORT_SYMBOL(tape_std_assign); | |
724 | EXPORT_SYMBOL(tape_std_unassign); | |
725 | EXPORT_SYMBOL(tape_std_display); | |
726 | EXPORT_SYMBOL(tape_std_read_block_id); | |
727 | EXPORT_SYMBOL(tape_std_mtload); | |
728 | EXPORT_SYMBOL(tape_std_mtsetblk); | |
729 | EXPORT_SYMBOL(tape_std_mtreset); | |
730 | EXPORT_SYMBOL(tape_std_mtfsf); | |
731 | EXPORT_SYMBOL(tape_std_mtfsr); | |
732 | EXPORT_SYMBOL(tape_std_mtbsr); | |
733 | EXPORT_SYMBOL(tape_std_mtweof); | |
734 | EXPORT_SYMBOL(tape_std_mtbsfm); | |
735 | EXPORT_SYMBOL(tape_std_mtbsf); | |
736 | EXPORT_SYMBOL(tape_std_mtfsfm); | |
737 | EXPORT_SYMBOL(tape_std_mtrew); | |
738 | EXPORT_SYMBOL(tape_std_mtoffl); | |
739 | EXPORT_SYMBOL(tape_std_mtnop); | |
740 | EXPORT_SYMBOL(tape_std_mteom); | |
741 | EXPORT_SYMBOL(tape_std_mtreten); | |
742 | EXPORT_SYMBOL(tape_std_mterase); | |
743 | EXPORT_SYMBOL(tape_std_mtunload); | |
744 | EXPORT_SYMBOL(tape_std_mtcompression); | |
745 | EXPORT_SYMBOL(tape_std_read_block); | |
746 | EXPORT_SYMBOL(tape_std_read_backward); | |
747 | EXPORT_SYMBOL(tape_std_write_block); | |
748 | EXPORT_SYMBOL(tape_std_process_eov); |