Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
1da177e4 LT |
2 | * standard tape device functions for ibm tapes. |
3 | * | |
4 | * S390 and zSeries version | |
a53c8fab | 5 | * Copyright IBM Corp. 2001, 2002 |
1da177e4 LT |
6 | * Author(s): Carsten Otte <cotte@de.ibm.com> |
7 | * Michael Holzheu <holzheu@de.ibm.com> | |
8 | * Tuan Ngo-Anh <ngoanh@de.ibm.com> | |
9 | * Martin Schwidefsky <schwidefsky@de.ibm.com> | |
10 | * Stefan Bader <shbader@de.ibm.com> | |
11 | */ | |
12 | ||
bb509912 MH |
13 | #define KMSG_COMPONENT "tape" |
14 | #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt | |
15 | ||
1da177e4 LT |
16 | #include <linux/stddef.h> |
17 | #include <linux/kernel.h> | |
18 | #include <linux/bio.h> | |
19 | #include <linux/timer.h> | |
20 | ||
21 | #include <asm/types.h> | |
22 | #include <asm/idals.h> | |
23 | #include <asm/ebcdic.h> | |
24 | #include <asm/tape390.h> | |
25 | ||
26 | #define TAPE_DBF_AREA tape_core_dbf | |
27 | ||
28 | #include "tape.h" | |
29 | #include "tape_std.h" | |
30 | ||
1da177e4 LT |
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; | |
6aa0d3a9 SG |
42 | device = request->device; |
43 | BUG_ON(!device); | |
1da177e4 | 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) | |
f2166bb1 SO |
49 | DBF_EVENT(3, "(%08x): Assign timeout: Cancel failed with rc = " |
50 | "%i\n", device->cdev_id, rc); | |
1da177e4 LT |
51 | } |
52 | ||
53 | int | |
54 | tape_std_assign(struct tape_device *device) | |
55 | { | |
56 | int rc; | |
57 | struct timer_list timeout; | |
58 | struct tape_request *request; | |
59 | ||
60 | request = tape_alloc_request(2, 11); | |
61 | if (IS_ERR(request)) | |
62 | return PTR_ERR(request); | |
63 | ||
64 | request->op = TO_ASSIGN; | |
65 | tape_ccw_cc(request->cpaddr, ASSIGN, 11, request->cpdata); | |
66 | tape_ccw_end(request->cpaddr + 1, NOP, 0, NULL); | |
67 | ||
68 | /* | |
69 | * The assign command sometimes blocks if the device is assigned | |
70 | * to another host (actually this shouldn't happen but it does). | |
71 | * So we set up a timeout for this call. | |
72 | */ | |
6292b9ef | 73 | init_timer_on_stack(&timeout); |
1da177e4 LT |
74 | timeout.function = tape_std_assign_timeout; |
75 | timeout.data = (unsigned long) request; | |
76 | timeout.expires = jiffies + 2 * HZ; | |
77 | add_timer(&timeout); | |
78 | ||
79 | rc = tape_do_io_interruptible(device, request); | |
80 | ||
02ba8d21 | 81 | del_timer_sync(&timeout); |
50f0e3bc | 82 | destroy_timer_on_stack(&timeout); |
1da177e4 LT |
83 | |
84 | if (rc != 0) { | |
1da177e4 LT |
85 | DBF_EVENT(3, "%08x: assign failed - device might be busy\n", |
86 | device->cdev_id); | |
87 | } else { | |
88 | DBF_EVENT(3, "%08x: Tape assigned\n", device->cdev_id); | |
89 | } | |
90 | tape_free_request(request); | |
91 | return rc; | |
92 | } | |
93 | ||
94 | /* | |
95 | * tape_std_unassign | |
96 | */ | |
97 | int | |
98 | tape_std_unassign (struct tape_device *device) | |
99 | { | |
100 | int rc; | |
101 | struct tape_request *request; | |
102 | ||
103 | if (device->tape_state == TS_NOT_OPER) { | |
104 | DBF_EVENT(3, "(%08x): Can't unassign device\n", | |
105 | device->cdev_id); | |
1da177e4 LT |
106 | return -EIO; |
107 | } | |
108 | ||
109 | request = tape_alloc_request(2, 11); | |
110 | if (IS_ERR(request)) | |
111 | return PTR_ERR(request); | |
112 | ||
113 | request->op = TO_UNASSIGN; | |
114 | tape_ccw_cc(request->cpaddr, UNASSIGN, 11, request->cpdata); | |
115 | tape_ccw_end(request->cpaddr + 1, NOP, 0, NULL); | |
116 | ||
117 | if ((rc = tape_do_io(device, request)) != 0) { | |
118 | DBF_EVENT(3, "%08x: Unassign failed\n", device->cdev_id); | |
1da177e4 LT |
119 | } else { |
120 | DBF_EVENT(3, "%08x: Tape unassigned\n", device->cdev_id); | |
121 | } | |
122 | tape_free_request(request); | |
123 | return rc; | |
124 | } | |
125 | ||
126 | /* | |
127 | * TAPE390_DISPLAY: Show a string on the tape display. | |
128 | */ | |
129 | int | |
130 | tape_std_display(struct tape_device *device, struct display_struct *disp) | |
131 | { | |
132 | struct tape_request *request; | |
133 | int rc; | |
134 | ||
135 | request = tape_alloc_request(2, 17); | |
136 | if (IS_ERR(request)) { | |
137 | DBF_EVENT(3, "TAPE: load display failed\n"); | |
138 | return PTR_ERR(request); | |
139 | } | |
140 | request->op = TO_DIS; | |
141 | ||
142 | *(unsigned char *) request->cpdata = disp->cntrl; | |
143 | DBF_EVENT(5, "TAPE: display cntrl=%04x\n", disp->cntrl); | |
144 | memcpy(((unsigned char *) request->cpdata) + 1, disp->message1, 8); | |
145 | memcpy(((unsigned char *) request->cpdata) + 9, disp->message2, 8); | |
146 | ASCEBC(((unsigned char*) request->cpdata) + 1, 16); | |
147 | ||
148 | tape_ccw_cc(request->cpaddr, LOAD_DISPLAY, 17, request->cpdata); | |
149 | tape_ccw_end(request->cpaddr + 1, NOP, 0, NULL); | |
150 | ||
151 | rc = tape_do_io_interruptible(device, request); | |
152 | tape_free_request(request); | |
153 | return rc; | |
154 | } | |
155 | ||
156 | /* | |
157 | * Read block id. | |
158 | */ | |
159 | int | |
160 | tape_std_read_block_id(struct tape_device *device, __u64 *id) | |
161 | { | |
162 | struct tape_request *request; | |
163 | int rc; | |
164 | ||
165 | request = tape_alloc_request(3, 8); | |
166 | if (IS_ERR(request)) | |
167 | return PTR_ERR(request); | |
168 | request->op = TO_RBI; | |
169 | /* setup ccws */ | |
170 | tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1, device->modeset_byte); | |
171 | tape_ccw_cc(request->cpaddr + 1, READ_BLOCK_ID, 8, request->cpdata); | |
172 | tape_ccw_end(request->cpaddr + 2, NOP, 0, NULL); | |
173 | /* execute it */ | |
174 | rc = tape_do_io(device, request); | |
175 | if (rc == 0) | |
176 | /* Get result from read buffer. */ | |
177 | *id = *(__u64 *) request->cpdata; | |
178 | tape_free_request(request); | |
179 | return rc; | |
180 | } | |
181 | ||
182 | int | |
183 | tape_std_terminate_write(struct tape_device *device) | |
184 | { | |
185 | int rc; | |
186 | ||
187 | if(device->required_tapemarks == 0) | |
188 | return 0; | |
189 | ||
190 | DBF_LH(5, "tape%d: terminate write %dxEOF\n", device->first_minor, | |
191 | device->required_tapemarks); | |
192 | ||
193 | rc = tape_mtop(device, MTWEOF, device->required_tapemarks); | |
194 | if (rc) | |
195 | return rc; | |
196 | ||
197 | device->required_tapemarks = 0; | |
198 | return tape_mtop(device, MTBSR, 1); | |
199 | } | |
200 | ||
201 | /* | |
202 | * MTLOAD: Loads the tape. | |
203 | * The default implementation just wait until the tape medium state changes | |
204 | * to MS_LOADED. | |
205 | */ | |
206 | int | |
207 | tape_std_mtload(struct tape_device *device, int count) | |
208 | { | |
209 | return wait_event_interruptible(device->state_change_wq, | |
210 | (device->medium_state == MS_LOADED)); | |
211 | } | |
212 | ||
213 | /* | |
214 | * MTSETBLK: Set block size. | |
215 | */ | |
216 | int | |
217 | tape_std_mtsetblk(struct tape_device *device, int count) | |
218 | { | |
219 | struct idal_buffer *new; | |
220 | ||
221 | DBF_LH(6, "tape_std_mtsetblk(%d)\n", count); | |
222 | if (count <= 0) { | |
223 | /* | |
224 | * Just set block_size to 0. tapechar_read/tapechar_write | |
225 | * will realloc the idal buffer if a bigger one than the | |
226 | * current is needed. | |
227 | */ | |
228 | device->char_data.block_size = 0; | |
229 | return 0; | |
230 | } | |
231 | if (device->char_data.idal_buf != NULL && | |
232 | device->char_data.idal_buf->size == count) | |
233 | /* We already have a idal buffer of that size. */ | |
234 | return 0; | |
235 | ||
236 | if (count > MAX_BLOCKSIZE) { | |
237 | DBF_EVENT(3, "Invalid block size (%d > %d) given.\n", | |
238 | count, MAX_BLOCKSIZE); | |
1da177e4 LT |
239 | return -EINVAL; |
240 | } | |
241 | ||
242 | /* Allocate a new idal buffer. */ | |
243 | new = idal_buffer_alloc(count, 0); | |
0983e568 | 244 | if (IS_ERR(new)) |
1da177e4 LT |
245 | return -ENOMEM; |
246 | if (device->char_data.idal_buf != NULL) | |
247 | idal_buffer_free(device->char_data.idal_buf); | |
248 | device->char_data.idal_buf = new; | |
249 | device->char_data.block_size = count; | |
250 | ||
251 | DBF_LH(6, "new blocksize is %d\n", device->char_data.block_size); | |
252 | ||
253 | return 0; | |
254 | } | |
255 | ||
256 | /* | |
257 | * MTRESET: Set block size to 0. | |
258 | */ | |
259 | int | |
260 | tape_std_mtreset(struct tape_device *device, int count) | |
261 | { | |
262 | DBF_EVENT(6, "TCHAR:devreset:\n"); | |
263 | device->char_data.block_size = 0; | |
264 | return 0; | |
265 | } | |
266 | ||
267 | /* | |
268 | * MTFSF: Forward space over 'count' file marks. The tape is positioned | |
269 | * at the EOT (End of Tape) side of the file mark. | |
270 | */ | |
271 | int | |
272 | tape_std_mtfsf(struct tape_device *device, int mt_count) | |
273 | { | |
274 | struct tape_request *request; | |
275 | struct ccw1 *ccw; | |
276 | ||
277 | request = tape_alloc_request(mt_count + 2, 0); | |
278 | if (IS_ERR(request)) | |
279 | return PTR_ERR(request); | |
280 | request->op = TO_FSF; | |
281 | /* setup ccws */ | |
282 | ccw = tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1, | |
283 | device->modeset_byte); | |
284 | ccw = tape_ccw_repeat(ccw, FORSPACEFILE, mt_count); | |
285 | ccw = tape_ccw_end(ccw, NOP, 0, NULL); | |
286 | ||
287 | /* execute it */ | |
288 | return tape_do_io_free(device, request); | |
289 | } | |
290 | ||
291 | /* | |
292 | * MTFSR: Forward space over 'count' tape blocks (blocksize is set | |
293 | * via MTSETBLK. | |
294 | */ | |
295 | int | |
296 | tape_std_mtfsr(struct tape_device *device, int mt_count) | |
297 | { | |
298 | struct tape_request *request; | |
299 | struct ccw1 *ccw; | |
300 | int rc; | |
301 | ||
302 | request = tape_alloc_request(mt_count + 2, 0); | |
303 | if (IS_ERR(request)) | |
304 | return PTR_ERR(request); | |
305 | request->op = TO_FSB; | |
306 | /* setup ccws */ | |
307 | ccw = tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1, | |
308 | device->modeset_byte); | |
309 | ccw = tape_ccw_repeat(ccw, FORSPACEBLOCK, mt_count); | |
310 | ccw = tape_ccw_end(ccw, NOP, 0, NULL); | |
311 | ||
312 | /* execute it */ | |
313 | rc = tape_do_io(device, request); | |
314 | if (rc == 0 && request->rescnt > 0) { | |
315 | DBF_LH(3, "FSR over tapemark\n"); | |
316 | rc = 1; | |
317 | } | |
318 | tape_free_request(request); | |
319 | ||
320 | return rc; | |
321 | } | |
322 | ||
323 | /* | |
324 | * MTBSR: Backward space over 'count' tape blocks. | |
325 | * (blocksize is set via MTSETBLK. | |
326 | */ | |
327 | int | |
328 | tape_std_mtbsr(struct tape_device *device, int mt_count) | |
329 | { | |
330 | struct tape_request *request; | |
331 | struct ccw1 *ccw; | |
332 | int rc; | |
333 | ||
334 | request = tape_alloc_request(mt_count + 2, 0); | |
335 | if (IS_ERR(request)) | |
336 | return PTR_ERR(request); | |
337 | request->op = TO_BSB; | |
338 | /* setup ccws */ | |
339 | ccw = tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1, | |
340 | device->modeset_byte); | |
341 | ccw = tape_ccw_repeat(ccw, BACKSPACEBLOCK, mt_count); | |
342 | ccw = tape_ccw_end(ccw, NOP, 0, NULL); | |
343 | ||
344 | /* execute it */ | |
345 | rc = tape_do_io(device, request); | |
346 | if (rc == 0 && request->rescnt > 0) { | |
347 | DBF_LH(3, "BSR over tapemark\n"); | |
348 | rc = 1; | |
349 | } | |
350 | tape_free_request(request); | |
351 | ||
352 | return rc; | |
353 | } | |
354 | ||
355 | /* | |
356 | * MTWEOF: Write 'count' file marks at the current position. | |
357 | */ | |
358 | int | |
359 | tape_std_mtweof(struct tape_device *device, int mt_count) | |
360 | { | |
361 | struct tape_request *request; | |
362 | struct ccw1 *ccw; | |
363 | ||
364 | request = tape_alloc_request(mt_count + 2, 0); | |
365 | if (IS_ERR(request)) | |
366 | return PTR_ERR(request); | |
367 | request->op = TO_WTM; | |
368 | /* setup ccws */ | |
369 | ccw = tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1, | |
370 | device->modeset_byte); | |
371 | ccw = tape_ccw_repeat(ccw, WRITETAPEMARK, mt_count); | |
372 | ccw = tape_ccw_end(ccw, NOP, 0, NULL); | |
373 | ||
374 | /* execute it */ | |
375 | return tape_do_io_free(device, request); | |
376 | } | |
377 | ||
378 | /* | |
379 | * MTBSFM: Backward space over 'count' file marks. | |
380 | * The tape is positioned at the BOT (Begin Of Tape) side of the | |
381 | * last skipped file mark. | |
382 | */ | |
383 | int | |
384 | tape_std_mtbsfm(struct tape_device *device, int mt_count) | |
385 | { | |
386 | struct tape_request *request; | |
387 | struct ccw1 *ccw; | |
388 | ||
389 | request = tape_alloc_request(mt_count + 2, 0); | |
390 | if (IS_ERR(request)) | |
391 | return PTR_ERR(request); | |
392 | request->op = TO_BSF; | |
393 | /* setup ccws */ | |
394 | ccw = tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1, | |
395 | device->modeset_byte); | |
396 | ccw = tape_ccw_repeat(ccw, BACKSPACEFILE, mt_count); | |
397 | ccw = tape_ccw_end(ccw, NOP, 0, NULL); | |
398 | ||
399 | /* execute it */ | |
400 | return tape_do_io_free(device, request); | |
401 | } | |
402 | ||
403 | /* | |
404 | * MTBSF: Backward space over 'count' file marks. The tape is positioned at | |
405 | * the EOT (End of Tape) side of the last skipped file mark. | |
406 | */ | |
407 | int | |
408 | tape_std_mtbsf(struct tape_device *device, int mt_count) | |
409 | { | |
410 | struct tape_request *request; | |
411 | struct ccw1 *ccw; | |
412 | int rc; | |
413 | ||
414 | request = tape_alloc_request(mt_count + 2, 0); | |
415 | if (IS_ERR(request)) | |
416 | return PTR_ERR(request); | |
417 | request->op = TO_BSF; | |
418 | /* setup ccws */ | |
419 | ccw = tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1, | |
420 | device->modeset_byte); | |
421 | ccw = tape_ccw_repeat(ccw, BACKSPACEFILE, mt_count); | |
422 | ccw = tape_ccw_end(ccw, NOP, 0, NULL); | |
423 | /* execute it */ | |
424 | rc = tape_do_io_free(device, request); | |
425 | if (rc == 0) { | |
426 | rc = tape_mtop(device, MTFSR, 1); | |
427 | if (rc > 0) | |
428 | rc = 0; | |
429 | } | |
430 | return rc; | |
431 | } | |
432 | ||
433 | /* | |
434 | * MTFSFM: Forward space over 'count' file marks. | |
435 | * The tape is positioned at the BOT (Begin Of Tape) side | |
436 | * of the last skipped file mark. | |
437 | */ | |
438 | int | |
439 | tape_std_mtfsfm(struct tape_device *device, int mt_count) | |
440 | { | |
441 | struct tape_request *request; | |
442 | struct ccw1 *ccw; | |
443 | int rc; | |
444 | ||
445 | request = tape_alloc_request(mt_count + 2, 0); | |
446 | if (IS_ERR(request)) | |
447 | return PTR_ERR(request); | |
448 | request->op = TO_FSF; | |
449 | /* setup ccws */ | |
450 | ccw = tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1, | |
451 | device->modeset_byte); | |
452 | ccw = tape_ccw_repeat(ccw, FORSPACEFILE, mt_count); | |
453 | ccw = tape_ccw_end(ccw, NOP, 0, NULL); | |
454 | /* execute it */ | |
455 | rc = tape_do_io_free(device, request); | |
456 | if (rc == 0) { | |
457 | rc = tape_mtop(device, MTBSR, 1); | |
458 | if (rc > 0) | |
459 | rc = 0; | |
460 | } | |
461 | ||
462 | return rc; | |
463 | } | |
464 | ||
465 | /* | |
466 | * MTREW: Rewind the tape. | |
467 | */ | |
468 | int | |
469 | tape_std_mtrew(struct tape_device *device, int mt_count) | |
470 | { | |
471 | struct tape_request *request; | |
472 | ||
473 | request = tape_alloc_request(3, 0); | |
474 | if (IS_ERR(request)) | |
475 | return PTR_ERR(request); | |
476 | request->op = TO_REW; | |
477 | /* setup ccws */ | |
478 | tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1, | |
479 | device->modeset_byte); | |
480 | tape_ccw_cc(request->cpaddr + 1, REWIND, 0, NULL); | |
481 | tape_ccw_end(request->cpaddr + 2, NOP, 0, NULL); | |
482 | ||
483 | /* execute it */ | |
484 | return tape_do_io_free(device, request); | |
485 | } | |
486 | ||
487 | /* | |
488 | * MTOFFL: Rewind the tape and put the drive off-line. | |
489 | * Implement 'rewind unload' | |
490 | */ | |
491 | int | |
492 | tape_std_mtoffl(struct tape_device *device, int mt_count) | |
493 | { | |
494 | struct tape_request *request; | |
495 | ||
496 | request = tape_alloc_request(3, 0); | |
497 | if (IS_ERR(request)) | |
498 | return PTR_ERR(request); | |
499 | request->op = TO_RUN; | |
500 | /* setup ccws */ | |
501 | tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1, device->modeset_byte); | |
502 | tape_ccw_cc(request->cpaddr + 1, REWIND_UNLOAD, 0, NULL); | |
503 | tape_ccw_end(request->cpaddr + 2, NOP, 0, NULL); | |
504 | ||
505 | /* execute it */ | |
506 | return tape_do_io_free(device, request); | |
507 | } | |
508 | ||
509 | /* | |
510 | * MTNOP: 'No operation'. | |
511 | */ | |
512 | int | |
513 | tape_std_mtnop(struct tape_device *device, int mt_count) | |
514 | { | |
515 | struct tape_request *request; | |
516 | ||
517 | request = tape_alloc_request(2, 0); | |
518 | if (IS_ERR(request)) | |
519 | return PTR_ERR(request); | |
520 | request->op = TO_NOP; | |
521 | /* setup ccws */ | |
522 | tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1, device->modeset_byte); | |
523 | tape_ccw_end(request->cpaddr + 1, NOP, 0, NULL); | |
524 | /* execute it */ | |
525 | return tape_do_io_free(device, request); | |
526 | } | |
527 | ||
528 | /* | |
529 | * MTEOM: positions at the end of the portion of the tape already used | |
530 | * for recordind data. MTEOM positions after the last file mark, ready for | |
531 | * appending another file. | |
532 | */ | |
533 | int | |
534 | tape_std_mteom(struct tape_device *device, int mt_count) | |
535 | { | |
536 | int rc; | |
537 | ||
538 | /* | |
539 | * Seek from the beginning of tape (rewind). | |
540 | */ | |
541 | if ((rc = tape_mtop(device, MTREW, 1)) < 0) | |
542 | return rc; | |
543 | ||
544 | /* | |
545 | * The logical end of volume is given by two sewuential tapemarks. | |
546 | * Look for this by skipping to the next file (over one tapemark) | |
547 | * and then test for another one (fsr returns 1 if a tapemark was | |
548 | * encountered). | |
549 | */ | |
550 | do { | |
551 | if ((rc = tape_mtop(device, MTFSF, 1)) < 0) | |
552 | return rc; | |
553 | if ((rc = tape_mtop(device, MTFSR, 1)) < 0) | |
554 | return rc; | |
555 | } while (rc == 0); | |
556 | ||
557 | return tape_mtop(device, MTBSR, 1); | |
558 | } | |
559 | ||
560 | /* | |
561 | * MTRETEN: Retension the tape, i.e. forward space to end of tape and rewind. | |
562 | */ | |
563 | int | |
564 | tape_std_mtreten(struct tape_device *device, int mt_count) | |
565 | { | |
566 | struct tape_request *request; | |
1da177e4 LT |
567 | |
568 | request = tape_alloc_request(4, 0); | |
569 | if (IS_ERR(request)) | |
570 | return PTR_ERR(request); | |
571 | request->op = TO_FSF; | |
572 | /* setup ccws */ | |
573 | tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1, device->modeset_byte); | |
574 | tape_ccw_cc(request->cpaddr + 1,FORSPACEFILE, 0, NULL); | |
575 | tape_ccw_cc(request->cpaddr + 2, NOP, 0, NULL); | |
576 | tape_ccw_end(request->cpaddr + 3, CCW_CMD_TIC, 0, request->cpaddr); | |
577 | /* execute it, MTRETEN rc gets ignored */ | |
160fbf2e | 578 | tape_do_io_interruptible(device, request); |
1da177e4 LT |
579 | tape_free_request(request); |
580 | return tape_mtop(device, MTREW, 1); | |
581 | } | |
582 | ||
583 | /* | |
584 | * MTERASE: erases the tape. | |
585 | */ | |
586 | int | |
587 | tape_std_mterase(struct tape_device *device, int mt_count) | |
588 | { | |
589 | struct tape_request *request; | |
590 | ||
591 | request = tape_alloc_request(6, 0); | |
592 | if (IS_ERR(request)) | |
593 | return PTR_ERR(request); | |
594 | request->op = TO_DSE; | |
595 | /* setup ccws */ | |
596 | tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1, device->modeset_byte); | |
597 | tape_ccw_cc(request->cpaddr + 1, REWIND, 0, NULL); | |
598 | tape_ccw_cc(request->cpaddr + 2, ERASE_GAP, 0, NULL); | |
599 | tape_ccw_cc(request->cpaddr + 3, DATA_SEC_ERASE, 0, NULL); | |
600 | tape_ccw_cc(request->cpaddr + 4, REWIND, 0, NULL); | |
601 | tape_ccw_end(request->cpaddr + 5, NOP, 0, NULL); | |
602 | ||
603 | /* execute it */ | |
604 | return tape_do_io_free(device, request); | |
605 | } | |
606 | ||
607 | /* | |
608 | * MTUNLOAD: Rewind the tape and unload it. | |
609 | */ | |
610 | int | |
611 | tape_std_mtunload(struct tape_device *device, int mt_count) | |
612 | { | |
613 | return tape_mtop(device, MTOFFL, mt_count); | |
614 | } | |
615 | ||
616 | /* | |
617 | * MTCOMPRESSION: used to enable compression. | |
618 | * Sets the IDRC on/off. | |
619 | */ | |
620 | int | |
621 | tape_std_mtcompression(struct tape_device *device, int mt_count) | |
622 | { | |
623 | struct tape_request *request; | |
624 | ||
625 | if (mt_count < 0 || mt_count > 1) { | |
626 | DBF_EXCEPTION(6, "xcom parm\n"); | |
1da177e4 LT |
627 | return -EINVAL; |
628 | } | |
629 | request = tape_alloc_request(2, 0); | |
630 | if (IS_ERR(request)) | |
631 | return PTR_ERR(request); | |
632 | request->op = TO_NOP; | |
633 | /* setup ccws */ | |
4925c7e2 MH |
634 | if (mt_count == 0) |
635 | *device->modeset_byte &= ~0x08; | |
636 | else | |
637 | *device->modeset_byte |= 0x08; | |
1da177e4 LT |
638 | tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1, device->modeset_byte); |
639 | tape_ccw_end(request->cpaddr + 1, NOP, 0, NULL); | |
640 | /* execute it */ | |
641 | return tape_do_io_free(device, request); | |
642 | } | |
643 | ||
644 | /* | |
645 | * Read Block | |
646 | */ | |
647 | struct tape_request * | |
648 | tape_std_read_block(struct tape_device *device, size_t count) | |
649 | { | |
650 | struct tape_request *request; | |
651 | ||
652 | /* | |
653 | * We have to alloc 4 ccws in order to be able to transform request | |
654 | * into a read backward request in error case. | |
655 | */ | |
656 | request = tape_alloc_request(4, 0); | |
657 | if (IS_ERR(request)) { | |
658 | DBF_EXCEPTION(6, "xrbl fail"); | |
659 | return request; | |
660 | } | |
661 | request->op = TO_RFO; | |
662 | tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1, device->modeset_byte); | |
663 | tape_ccw_end_idal(request->cpaddr + 1, READ_FORWARD, | |
664 | device->char_data.idal_buf); | |
665 | DBF_EVENT(6, "xrbl ccwg\n"); | |
666 | return request; | |
667 | } | |
668 | ||
669 | /* | |
670 | * Read Block backward transformation function. | |
671 | */ | |
672 | void | |
673 | tape_std_read_backward(struct tape_device *device, struct tape_request *request) | |
674 | { | |
675 | /* | |
676 | * We have allocated 4 ccws in tape_std_read, so we can now | |
677 | * transform the request to a read backward, followed by a | |
678 | * forward space block. | |
679 | */ | |
680 | request->op = TO_RBA; | |
681 | tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1, device->modeset_byte); | |
682 | tape_ccw_cc_idal(request->cpaddr + 1, READ_BACKWARD, | |
683 | device->char_data.idal_buf); | |
684 | tape_ccw_cc(request->cpaddr + 2, FORSPACEBLOCK, 0, NULL); | |
685 | tape_ccw_end(request->cpaddr + 3, NOP, 0, NULL); | |
686 | DBF_EVENT(6, "xrop ccwg");} | |
687 | ||
688 | /* | |
689 | * Write Block | |
690 | */ | |
691 | struct tape_request * | |
692 | tape_std_write_block(struct tape_device *device, size_t count) | |
693 | { | |
694 | struct tape_request *request; | |
695 | ||
696 | request = tape_alloc_request(2, 0); | |
697 | if (IS_ERR(request)) { | |
698 | DBF_EXCEPTION(6, "xwbl fail\n"); | |
699 | return request; | |
700 | } | |
701 | request->op = TO_WRI; | |
702 | tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1, device->modeset_byte); | |
703 | tape_ccw_end_idal(request->cpaddr + 1, WRITE_CMD, | |
704 | device->char_data.idal_buf); | |
705 | DBF_EVENT(6, "xwbl ccwg\n"); | |
706 | return request; | |
707 | } | |
708 | ||
709 | /* | |
710 | * This routine is called by frontend after an ENOSP on write | |
711 | */ | |
712 | void | |
713 | tape_std_process_eov(struct tape_device *device) | |
714 | { | |
715 | /* | |
716 | * End of volume: We have to backspace the last written record, then | |
717 | * we TRY to write a tapemark and then backspace over the written TM | |
718 | */ | |
719 | if (tape_mtop(device, MTBSR, 1) == 0 && | |
720 | tape_mtop(device, MTWEOF, 1) == 0) { | |
721 | tape_mtop(device, MTBSR, 1); | |
722 | } | |
723 | } | |
724 | ||
725 | EXPORT_SYMBOL(tape_std_assign); | |
726 | EXPORT_SYMBOL(tape_std_unassign); | |
727 | EXPORT_SYMBOL(tape_std_display); | |
728 | EXPORT_SYMBOL(tape_std_read_block_id); | |
729 | EXPORT_SYMBOL(tape_std_mtload); | |
730 | EXPORT_SYMBOL(tape_std_mtsetblk); | |
731 | EXPORT_SYMBOL(tape_std_mtreset); | |
732 | EXPORT_SYMBOL(tape_std_mtfsf); | |
733 | EXPORT_SYMBOL(tape_std_mtfsr); | |
734 | EXPORT_SYMBOL(tape_std_mtbsr); | |
735 | EXPORT_SYMBOL(tape_std_mtweof); | |
736 | EXPORT_SYMBOL(tape_std_mtbsfm); | |
737 | EXPORT_SYMBOL(tape_std_mtbsf); | |
738 | EXPORT_SYMBOL(tape_std_mtfsfm); | |
739 | EXPORT_SYMBOL(tape_std_mtrew); | |
740 | EXPORT_SYMBOL(tape_std_mtoffl); | |
741 | EXPORT_SYMBOL(tape_std_mtnop); | |
742 | EXPORT_SYMBOL(tape_std_mteom); | |
743 | EXPORT_SYMBOL(tape_std_mtreten); | |
744 | EXPORT_SYMBOL(tape_std_mterase); | |
745 | EXPORT_SYMBOL(tape_std_mtunload); | |
746 | EXPORT_SYMBOL(tape_std_mtcompression); | |
747 | EXPORT_SYMBOL(tape_std_read_block); | |
748 | EXPORT_SYMBOL(tape_std_read_backward); | |
749 | EXPORT_SYMBOL(tape_std_write_block); | |
750 | EXPORT_SYMBOL(tape_std_process_eov); |