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