Commit | Line | Data |
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1da177e4 | 1 | /* |
1da177e4 LT |
2 | * tape device discipline for 3480/3490 tapes. |
3 | * | |
3ef32e62 | 4 | * Copyright IBM Corp. 2001, 2009 |
1da177e4 LT |
5 | * Author(s): Carsten Otte <cotte@de.ibm.com> |
6 | * Tuan Ngo-Anh <ngoanh@de.ibm.com> | |
7 | * Martin Schwidefsky <schwidefsky@de.ibm.com> | |
8 | */ | |
9 | ||
59e36927 | 10 | #define KMSG_COMPONENT "tape_34xx" |
bb509912 | 11 | #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt |
ab640db0 | 12 | |
1da177e4 LT |
13 | #include <linux/module.h> |
14 | #include <linux/init.h> | |
15 | #include <linux/bio.h> | |
16 | #include <linux/workqueue.h> | |
5a0e3ad6 | 17 | #include <linux/slab.h> |
1da177e4 LT |
18 | |
19 | #define TAPE_DBF_AREA tape_34xx_dbf | |
20 | ||
21 | #include "tape.h" | |
22 | #include "tape_std.h" | |
23 | ||
1da177e4 LT |
24 | /* |
25 | * Pointer to debug area. | |
26 | */ | |
27 | debug_info_t *TAPE_DBF_AREA = NULL; | |
28 | EXPORT_SYMBOL(TAPE_DBF_AREA); | |
29 | ||
1da177e4 LT |
30 | #define TAPE34XX_FMT_3480 0 |
31 | #define TAPE34XX_FMT_3480_2_XF 1 | |
32 | #define TAPE34XX_FMT_3480_XF 2 | |
33 | ||
34 | struct tape_34xx_block_id { | |
35 | unsigned int wrap : 1; | |
36 | unsigned int segment : 7; | |
37 | unsigned int format : 2; | |
38 | unsigned int block : 22; | |
39 | }; | |
40 | ||
41 | /* | |
42 | * A list of block ID's is used to faster seek blocks. | |
43 | */ | |
44 | struct tape_34xx_sbid { | |
45 | struct list_head list; | |
46 | struct tape_34xx_block_id bid; | |
47 | }; | |
48 | ||
49 | static void tape_34xx_delete_sbid_from(struct tape_device *, int); | |
50 | ||
51 | /* | |
52 | * Medium sense for 34xx tapes. There is no 'real' medium sense call. | |
53 | * So we just do a normal sense. | |
54 | */ | |
0c2bd9b2 | 55 | static void __tape_34xx_medium_sense(struct tape_request *request) |
1da177e4 | 56 | { |
0c2bd9b2 MS |
57 | struct tape_device *device = request->device; |
58 | unsigned char *sense; | |
1da177e4 | 59 | |
1da177e4 LT |
60 | if (request->rc == 0) { |
61 | sense = request->cpdata; | |
62 | ||
63 | /* | |
64 | * This isn't quite correct. But since INTERVENTION_REQUIRED | |
65 | * means that the drive is 'neither ready nor on-line' it is | |
66 | * only slightly inaccurate to say there is no tape loaded if | |
67 | * the drive isn't online... | |
68 | */ | |
69 | if (sense[0] & SENSE_INTERVENTION_REQUIRED) | |
70 | tape_med_state_set(device, MS_UNLOADED); | |
71 | else | |
72 | tape_med_state_set(device, MS_LOADED); | |
73 | ||
74 | if (sense[1] & SENSE_WRITE_PROTECT) | |
75 | device->tape_generic_status |= GMT_WR_PROT(~0); | |
76 | else | |
77 | device->tape_generic_status &= ~GMT_WR_PROT(~0); | |
0c2bd9b2 | 78 | } else |
1da177e4 LT |
79 | DBF_EVENT(4, "tape_34xx: medium sense failed with rc=%d\n", |
80 | request->rc); | |
1da177e4 | 81 | tape_free_request(request); |
0c2bd9b2 MS |
82 | } |
83 | ||
84 | static int tape_34xx_medium_sense(struct tape_device *device) | |
85 | { | |
86 | struct tape_request *request; | |
87 | int rc; | |
88 | ||
89 | request = tape_alloc_request(1, 32); | |
90 | if (IS_ERR(request)) { | |
91 | DBF_EXCEPTION(6, "MSEN fail\n"); | |
92 | return PTR_ERR(request); | |
93 | } | |
1da177e4 | 94 | |
0c2bd9b2 MS |
95 | request->op = TO_MSEN; |
96 | tape_ccw_end(request->cpaddr, SENSE, 32, request->cpdata); | |
97 | rc = tape_do_io_interruptible(device, request); | |
98 | __tape_34xx_medium_sense(request); | |
1da177e4 LT |
99 | return rc; |
100 | } | |
101 | ||
0c2bd9b2 MS |
102 | static void tape_34xx_medium_sense_async(struct tape_device *device) |
103 | { | |
104 | struct tape_request *request; | |
105 | ||
106 | request = tape_alloc_request(1, 32); | |
107 | if (IS_ERR(request)) { | |
108 | DBF_EXCEPTION(6, "MSEN fail\n"); | |
109 | return; | |
110 | } | |
111 | ||
112 | request->op = TO_MSEN; | |
113 | tape_ccw_end(request->cpaddr, SENSE, 32, request->cpdata); | |
114 | request->callback = (void *) __tape_34xx_medium_sense; | |
115 | request->callback_data = NULL; | |
116 | tape_do_io_async(device, request); | |
117 | } | |
118 | ||
c1637532 MS |
119 | struct tape_34xx_work { |
120 | struct tape_device *device; | |
121 | enum tape_op op; | |
122 | struct work_struct work; | |
123 | }; | |
124 | ||
1da177e4 LT |
125 | /* |
126 | * These functions are currently used only to schedule a medium_sense for | |
127 | * later execution. This is because we get an interrupt whenever a medium | |
128 | * is inserted but cannot call tape_do_io* from an interrupt context. | |
129 | * Maybe that's useful for other actions we want to start from the | |
130 | * interrupt handler. | |
0c2bd9b2 MS |
131 | * Note: the work handler is called by the system work queue. The tape |
132 | * commands started by the handler need to be asynchrounous, otherwise | |
133 | * a deadlock can occur e.g. in case of a deferred cc=1 (see __tape_do_irq). | |
1da177e4 LT |
134 | */ |
135 | static void | |
c1637532 | 136 | tape_34xx_work_handler(struct work_struct *work) |
1da177e4 | 137 | { |
c1637532 MS |
138 | struct tape_34xx_work *p = |
139 | container_of(work, struct tape_34xx_work, work); | |
8fd138c3 | 140 | struct tape_device *device = p->device; |
1da177e4 LT |
141 | |
142 | switch(p->op) { | |
143 | case TO_MSEN: | |
0c2bd9b2 | 144 | tape_34xx_medium_sense_async(device); |
1da177e4 LT |
145 | break; |
146 | default: | |
147 | DBF_EVENT(3, "T34XX: internal error: unknown work\n"); | |
148 | } | |
8fd138c3 | 149 | tape_put_device(device); |
1da177e4 LT |
150 | kfree(p); |
151 | } | |
152 | ||
153 | static int | |
154 | tape_34xx_schedule_work(struct tape_device *device, enum tape_op op) | |
155 | { | |
c1637532 | 156 | struct tape_34xx_work *p; |
1da177e4 | 157 | |
dd00cc48 | 158 | if ((p = kzalloc(sizeof(*p), GFP_ATOMIC)) == NULL) |
1da177e4 LT |
159 | return -ENOMEM; |
160 | ||
c1637532 | 161 | INIT_WORK(&p->work, tape_34xx_work_handler); |
1da177e4 | 162 | |
8fd138c3 | 163 | p->device = tape_get_device(device); |
1da177e4 LT |
164 | p->op = op; |
165 | ||
166 | schedule_work(&p->work); | |
167 | return 0; | |
168 | } | |
169 | ||
170 | /* | |
171 | * Done Handler is called when dev stat = DEVICE-END (successful operation) | |
172 | */ | |
173 | static inline int | |
174 | tape_34xx_done(struct tape_request *request) | |
175 | { | |
176 | DBF_EVENT(6, "%s done\n", tape_op_verbose[request->op]); | |
177 | ||
178 | switch (request->op) { | |
179 | case TO_DSE: | |
180 | case TO_RUN: | |
181 | case TO_WRI: | |
182 | case TO_WTM: | |
183 | case TO_ASSIGN: | |
184 | case TO_UNASSIGN: | |
185 | tape_34xx_delete_sbid_from(request->device, 0); | |
186 | break; | |
187 | default: | |
188 | ; | |
189 | } | |
190 | return TAPE_IO_SUCCESS; | |
191 | } | |
192 | ||
193 | static inline int | |
194 | tape_34xx_erp_failed(struct tape_request *request, int rc) | |
195 | { | |
196 | DBF_EVENT(3, "Error recovery failed for %s (RC=%d)\n", | |
197 | tape_op_verbose[request->op], rc); | |
198 | return rc; | |
199 | } | |
200 | ||
201 | static inline int | |
202 | tape_34xx_erp_succeeded(struct tape_request *request) | |
203 | { | |
204 | DBF_EVENT(3, "Error Recovery successful for %s\n", | |
205 | tape_op_verbose[request->op]); | |
206 | return tape_34xx_done(request); | |
207 | } | |
208 | ||
209 | static inline int | |
210 | tape_34xx_erp_retry(struct tape_request *request) | |
211 | { | |
212 | DBF_EVENT(3, "xerp retr %s\n", tape_op_verbose[request->op]); | |
213 | return TAPE_IO_RETRY; | |
214 | } | |
215 | ||
216 | /* | |
217 | * This function is called, when no request is outstanding and we get an | |
218 | * interrupt | |
219 | */ | |
220 | static int | |
221 | tape_34xx_unsolicited_irq(struct tape_device *device, struct irb *irb) | |
222 | { | |
23d805b6 | 223 | if (irb->scsw.cmd.dstat == 0x85) { /* READY */ |
1da177e4 LT |
224 | /* A medium was inserted in the drive. */ |
225 | DBF_EVENT(6, "xuud med\n"); | |
226 | tape_34xx_delete_sbid_from(device, 0); | |
227 | tape_34xx_schedule_work(device, TO_MSEN); | |
228 | } else { | |
229 | DBF_EVENT(3, "unsol.irq! dev end: %08x\n", device->cdev_id); | |
ab640db0 | 230 | tape_dump_sense_dbf(device, NULL, irb); |
1da177e4 LT |
231 | } |
232 | return TAPE_IO_SUCCESS; | |
233 | } | |
234 | ||
235 | /* | |
236 | * Read Opposite Error Recovery Function: | |
237 | * Used, when Read Forward does not work | |
238 | */ | |
239 | static int | |
240 | tape_34xx_erp_read_opposite(struct tape_device *device, | |
241 | struct tape_request *request) | |
242 | { | |
243 | if (request->op == TO_RFO) { | |
244 | /* | |
245 | * We did read forward, but the data could not be read | |
246 | * *correctly*. We transform the request to a read backward | |
247 | * and try again. | |
248 | */ | |
249 | tape_std_read_backward(device, request); | |
250 | return tape_34xx_erp_retry(request); | |
251 | } | |
ab640db0 | 252 | |
1da177e4 LT |
253 | /* |
254 | * We tried to read forward and backward, but hat no | |
255 | * success -> failed. | |
256 | */ | |
257 | return tape_34xx_erp_failed(request, -EIO); | |
258 | } | |
259 | ||
260 | static int | |
261 | tape_34xx_erp_bug(struct tape_device *device, struct tape_request *request, | |
262 | struct irb *irb, int no) | |
263 | { | |
264 | if (request->op != TO_ASSIGN) { | |
ab640db0 CO |
265 | dev_err(&device->cdev->dev, "An unexpected condition %d " |
266 | "occurred in tape error recovery\n", no); | |
267 | tape_dump_sense_dbf(device, request, irb); | |
1da177e4 LT |
268 | } |
269 | return tape_34xx_erp_failed(request, -EIO); | |
270 | } | |
271 | ||
272 | /* | |
273 | * Handle data overrun between cu and drive. The channel speed might | |
274 | * be too slow. | |
275 | */ | |
276 | static int | |
277 | tape_34xx_erp_overrun(struct tape_device *device, struct tape_request *request, | |
278 | struct irb *irb) | |
279 | { | |
280 | if (irb->ecw[3] == 0x40) { | |
ab640db0 CO |
281 | dev_warn (&device->cdev->dev, "A data overrun occurred between" |
282 | " the control unit and tape unit\n"); | |
1da177e4 LT |
283 | return tape_34xx_erp_failed(request, -EIO); |
284 | } | |
285 | return tape_34xx_erp_bug(device, request, irb, -1); | |
286 | } | |
287 | ||
288 | /* | |
289 | * Handle record sequence error. | |
290 | */ | |
291 | static int | |
292 | tape_34xx_erp_sequence(struct tape_device *device, | |
293 | struct tape_request *request, struct irb *irb) | |
294 | { | |
295 | if (irb->ecw[3] == 0x41) { | |
296 | /* | |
297 | * cu detected incorrect block-id sequence on tape. | |
298 | */ | |
ab640db0 CO |
299 | dev_warn (&device->cdev->dev, "The block ID sequence on the " |
300 | "tape is incorrect\n"); | |
1da177e4 LT |
301 | return tape_34xx_erp_failed(request, -EIO); |
302 | } | |
303 | /* | |
304 | * Record sequence error bit is set, but erpa does not | |
305 | * show record sequence error. | |
306 | */ | |
307 | return tape_34xx_erp_bug(device, request, irb, -2); | |
308 | } | |
309 | ||
310 | /* | |
311 | * This function analyses the tape's sense-data in case of a unit-check. | |
312 | * If possible, it tries to recover from the error. Else the user is | |
313 | * informed about the problem. | |
314 | */ | |
315 | static int | |
316 | tape_34xx_unit_check(struct tape_device *device, struct tape_request *request, | |
317 | struct irb *irb) | |
318 | { | |
319 | int inhibit_cu_recovery; | |
320 | __u8* sense; | |
321 | ||
322 | inhibit_cu_recovery = (*device->modeset_byte & 0x80) ? 1 : 0; | |
323 | sense = irb->ecw; | |
324 | ||
1da177e4 LT |
325 | if ( |
326 | sense[0] & SENSE_COMMAND_REJECT && | |
327 | sense[1] & SENSE_WRITE_PROTECT | |
328 | ) { | |
329 | if ( | |
330 | request->op == TO_DSE || | |
331 | request->op == TO_WRI || | |
332 | request->op == TO_WTM | |
333 | ) { | |
334 | /* medium is write protected */ | |
335 | return tape_34xx_erp_failed(request, -EACCES); | |
336 | } else { | |
337 | return tape_34xx_erp_bug(device, request, irb, -3); | |
338 | } | |
339 | } | |
340 | ||
341 | /* | |
342 | * Special cases for various tape-states when reaching | |
343 | * end of recorded area | |
344 | * | |
345 | * FIXME: Maybe a special case of the special case: | |
346 | * sense[0] == SENSE_EQUIPMENT_CHECK && | |
347 | * sense[1] == SENSE_DRIVE_ONLINE && | |
348 | * sense[3] == 0x47 (Volume Fenced) | |
349 | * | |
350 | * This was caused by continued FSF or FSR after an | |
351 | * 'End Of Data'. | |
352 | */ | |
353 | if (( | |
354 | sense[0] == SENSE_DATA_CHECK || | |
355 | sense[0] == SENSE_EQUIPMENT_CHECK || | |
356 | sense[0] == SENSE_EQUIPMENT_CHECK + SENSE_DEFERRED_UNIT_CHECK | |
357 | ) && ( | |
358 | sense[1] == SENSE_DRIVE_ONLINE || | |
359 | sense[1] == SENSE_BEGINNING_OF_TAPE + SENSE_WRITE_MODE | |
360 | )) { | |
361 | switch (request->op) { | |
362 | /* | |
363 | * sense[0] == SENSE_DATA_CHECK && | |
364 | * sense[1] == SENSE_DRIVE_ONLINE | |
365 | * sense[3] == 0x36 (End Of Data) | |
366 | * | |
367 | * Further seeks might return a 'Volume Fenced'. | |
368 | */ | |
369 | case TO_FSF: | |
370 | case TO_FSB: | |
371 | /* Trying to seek beyond end of recorded area */ | |
372 | return tape_34xx_erp_failed(request, -ENOSPC); | |
373 | case TO_BSB: | |
374 | return tape_34xx_erp_retry(request); | |
375 | ||
376 | /* | |
377 | * sense[0] == SENSE_DATA_CHECK && | |
378 | * sense[1] == SENSE_DRIVE_ONLINE && | |
379 | * sense[3] == 0x36 (End Of Data) | |
380 | */ | |
381 | case TO_LBL: | |
382 | /* Block could not be located. */ | |
383 | tape_34xx_delete_sbid_from(device, 0); | |
384 | return tape_34xx_erp_failed(request, -EIO); | |
385 | ||
386 | case TO_RFO: | |
387 | /* Read beyond end of recorded area -> 0 bytes read */ | |
388 | return tape_34xx_erp_failed(request, 0); | |
389 | ||
390 | /* | |
391 | * sense[0] == SENSE_EQUIPMENT_CHECK && | |
392 | * sense[1] == SENSE_DRIVE_ONLINE && | |
393 | * sense[3] == 0x38 (Physical End Of Volume) | |
394 | */ | |
395 | case TO_WRI: | |
396 | /* Writing at physical end of volume */ | |
397 | return tape_34xx_erp_failed(request, -ENOSPC); | |
398 | default: | |
1da177e4 LT |
399 | return tape_34xx_erp_failed(request, 0); |
400 | } | |
401 | } | |
402 | ||
403 | /* Sensing special bits */ | |
404 | if (sense[0] & SENSE_BUS_OUT_CHECK) | |
405 | return tape_34xx_erp_retry(request); | |
406 | ||
407 | if (sense[0] & SENSE_DATA_CHECK) { | |
408 | /* | |
409 | * hardware failure, damaged tape or improper | |
410 | * operating conditions | |
411 | */ | |
412 | switch (sense[3]) { | |
413 | case 0x23: | |
414 | /* a read data check occurred */ | |
415 | if ((sense[2] & SENSE_TAPE_SYNC_MODE) || | |
416 | inhibit_cu_recovery) | |
417 | // data check is not permanent, may be | |
418 | // recovered. We always use async-mode with | |
419 | // cu-recovery, so this should *never* happen. | |
420 | return tape_34xx_erp_bug(device, request, | |
421 | irb, -4); | |
422 | ||
423 | /* data check is permanent, CU recovery has failed */ | |
ab640db0 CO |
424 | dev_warn (&device->cdev->dev, "A read error occurred " |
425 | "that cannot be recovered\n"); | |
1da177e4 LT |
426 | return tape_34xx_erp_failed(request, -EIO); |
427 | case 0x25: | |
428 | // a write data check occurred | |
429 | if ((sense[2] & SENSE_TAPE_SYNC_MODE) || | |
430 | inhibit_cu_recovery) | |
431 | // data check is not permanent, may be | |
432 | // recovered. We always use async-mode with | |
433 | // cu-recovery, so this should *never* happen. | |
434 | return tape_34xx_erp_bug(device, request, | |
435 | irb, -5); | |
436 | ||
437 | // data check is permanent, cu-recovery has failed | |
ab640db0 CO |
438 | dev_warn (&device->cdev->dev, "A write error on the " |
439 | "tape cannot be recovered\n"); | |
1da177e4 LT |
440 | return tape_34xx_erp_failed(request, -EIO); |
441 | case 0x26: | |
442 | /* Data Check (read opposite) occurred. */ | |
443 | return tape_34xx_erp_read_opposite(device, request); | |
444 | case 0x28: | |
445 | /* ID-Mark at tape start couldn't be written */ | |
ab640db0 CO |
446 | dev_warn (&device->cdev->dev, "Writing the ID-mark " |
447 | "failed\n"); | |
1da177e4 LT |
448 | return tape_34xx_erp_failed(request, -EIO); |
449 | case 0x31: | |
450 | /* Tape void. Tried to read beyond end of device. */ | |
ab640db0 CO |
451 | dev_warn (&device->cdev->dev, "Reading the tape beyond" |
452 | " the end of the recorded area failed\n"); | |
1da177e4 LT |
453 | return tape_34xx_erp_failed(request, -ENOSPC); |
454 | case 0x41: | |
455 | /* Record sequence error. */ | |
ab640db0 CO |
456 | dev_warn (&device->cdev->dev, "The tape contains an " |
457 | "incorrect block ID sequence\n"); | |
1da177e4 LT |
458 | return tape_34xx_erp_failed(request, -EIO); |
459 | default: | |
460 | /* all data checks for 3480 should result in one of | |
461 | * the above erpa-codes. For 3490, other data-check | |
462 | * conditions do exist. */ | |
463 | if (device->cdev->id.driver_info == tape_3480) | |
464 | return tape_34xx_erp_bug(device, request, | |
465 | irb, -6); | |
466 | } | |
467 | } | |
468 | ||
469 | if (sense[0] & SENSE_OVERRUN) | |
470 | return tape_34xx_erp_overrun(device, request, irb); | |
471 | ||
472 | if (sense[1] & SENSE_RECORD_SEQUENCE_ERR) | |
473 | return tape_34xx_erp_sequence(device, request, irb); | |
474 | ||
475 | /* Sensing erpa codes */ | |
476 | switch (sense[3]) { | |
477 | case 0x00: | |
478 | /* Unit check with erpa code 0. Report and ignore. */ | |
1da177e4 LT |
479 | return TAPE_IO_SUCCESS; |
480 | case 0x21: | |
481 | /* | |
482 | * Data streaming not operational. CU will switch to | |
483 | * interlock mode. Reissue the command. | |
484 | */ | |
1da177e4 LT |
485 | return tape_34xx_erp_retry(request); |
486 | case 0x22: | |
487 | /* | |
488 | * Path equipment check. Might be drive adapter error, buffer | |
489 | * error on the lower interface, internal path not usable, | |
490 | * or error during cartridge load. | |
491 | */ | |
ab640db0 CO |
492 | dev_warn (&device->cdev->dev, "A path equipment check occurred" |
493 | " for the tape device\n"); | |
1da177e4 LT |
494 | return tape_34xx_erp_failed(request, -EIO); |
495 | case 0x24: | |
496 | /* | |
497 | * Load display check. Load display was command was issued, | |
498 | * but the drive is displaying a drive check message. Can | |
499 | * be threated as "device end". | |
500 | */ | |
501 | return tape_34xx_erp_succeeded(request); | |
502 | case 0x27: | |
503 | /* | |
504 | * Command reject. May indicate illegal channel program or | |
505 | * buffer over/underrun. Since all channel programs are | |
506 | * issued by this driver and ought be correct, we assume a | |
507 | * over/underrun situation and retry the channel program. | |
508 | */ | |
509 | return tape_34xx_erp_retry(request); | |
510 | case 0x29: | |
511 | /* | |
512 | * Function incompatible. Either the tape is idrc compressed | |
513 | * but the hardware isn't capable to do idrc, or a perform | |
514 | * subsystem func is issued and the CU is not on-line. | |
515 | */ | |
1da177e4 LT |
516 | return tape_34xx_erp_failed(request, -EIO); |
517 | case 0x2a: | |
518 | /* | |
519 | * Unsolicited environmental data. An internal counter | |
520 | * overflows, we can ignore this and reissue the cmd. | |
521 | */ | |
522 | return tape_34xx_erp_retry(request); | |
523 | case 0x2b: | |
524 | /* | |
525 | * Environmental data present. Indicates either unload | |
526 | * completed ok or read buffered log command completed ok. | |
527 | */ | |
528 | if (request->op == TO_RUN) { | |
529 | /* Rewind unload completed ok. */ | |
530 | tape_med_state_set(device, MS_UNLOADED); | |
531 | return tape_34xx_erp_succeeded(request); | |
532 | } | |
533 | /* tape_34xx doesn't use read buffered log commands. */ | |
534 | return tape_34xx_erp_bug(device, request, irb, sense[3]); | |
535 | case 0x2c: | |
536 | /* | |
537 | * Permanent equipment check. CU has tried recovery, but | |
538 | * did not succeed. | |
539 | */ | |
540 | return tape_34xx_erp_failed(request, -EIO); | |
541 | case 0x2d: | |
542 | /* Data security erase failure. */ | |
543 | if (request->op == TO_DSE) | |
544 | return tape_34xx_erp_failed(request, -EIO); | |
545 | /* Data security erase failure, but no such command issued. */ | |
546 | return tape_34xx_erp_bug(device, request, irb, sense[3]); | |
547 | case 0x2e: | |
548 | /* | |
549 | * Not capable. This indicates either that the drive fails | |
550 | * reading the format id mark or that that format specified | |
551 | * is not supported by the drive. | |
552 | */ | |
ab640db0 CO |
553 | dev_warn (&device->cdev->dev, "The tape unit cannot process " |
554 | "the tape format\n"); | |
1da177e4 LT |
555 | return tape_34xx_erp_failed(request, -EMEDIUMTYPE); |
556 | case 0x30: | |
557 | /* The medium is write protected. */ | |
ab640db0 CO |
558 | dev_warn (&device->cdev->dev, "The tape medium is write-" |
559 | "protected\n"); | |
1da177e4 LT |
560 | return tape_34xx_erp_failed(request, -EACCES); |
561 | case 0x32: | |
562 | // Tension loss. We cannot recover this, it's an I/O error. | |
ab640db0 CO |
563 | dev_warn (&device->cdev->dev, "The tape does not have the " |
564 | "required tape tension\n"); | |
1da177e4 LT |
565 | return tape_34xx_erp_failed(request, -EIO); |
566 | case 0x33: | |
567 | /* | |
568 | * Load Failure. The cartridge was not inserted correctly or | |
569 | * the tape is not threaded correctly. | |
570 | */ | |
ab640db0 CO |
571 | dev_warn (&device->cdev->dev, "The tape unit failed to load" |
572 | " the cartridge\n"); | |
1da177e4 LT |
573 | tape_34xx_delete_sbid_from(device, 0); |
574 | return tape_34xx_erp_failed(request, -EIO); | |
575 | case 0x34: | |
576 | /* | |
577 | * Unload failure. The drive cannot maintain tape tension | |
578 | * and control tape movement during an unload operation. | |
579 | */ | |
ab640db0 CO |
580 | dev_warn (&device->cdev->dev, "Automatic unloading of the tape" |
581 | " cartridge failed\n"); | |
1da177e4 LT |
582 | if (request->op == TO_RUN) |
583 | return tape_34xx_erp_failed(request, -EIO); | |
584 | return tape_34xx_erp_bug(device, request, irb, sense[3]); | |
585 | case 0x35: | |
586 | /* | |
587 | * Drive equipment check. One of the following: | |
588 | * - cu cannot recover from a drive detected error | |
589 | * - a check code message is shown on drive display | |
590 | * - the cartridge loader does not respond correctly | |
591 | * - a failure occurs during an index, load, or unload cycle | |
592 | */ | |
ab640db0 CO |
593 | dev_warn (&device->cdev->dev, "An equipment check has occurred" |
594 | " on the tape unit\n"); | |
1da177e4 LT |
595 | return tape_34xx_erp_failed(request, -EIO); |
596 | case 0x36: | |
597 | if (device->cdev->id.driver_info == tape_3490) | |
598 | /* End of data. */ | |
599 | return tape_34xx_erp_failed(request, -EIO); | |
600 | /* This erpa is reserved for 3480 */ | |
601 | return tape_34xx_erp_bug(device, request, irb, sense[3]); | |
602 | case 0x37: | |
603 | /* | |
604 | * Tape length error. The tape is shorter than reported in | |
605 | * the beginning-of-tape data. | |
606 | */ | |
ab640db0 CO |
607 | dev_warn (&device->cdev->dev, "The tape information states an" |
608 | " incorrect length\n"); | |
1da177e4 LT |
609 | return tape_34xx_erp_failed(request, -EIO); |
610 | case 0x38: | |
611 | /* | |
612 | * Physical end of tape. A read/write operation reached | |
613 | * the physical end of tape. | |
614 | */ | |
615 | if (request->op==TO_WRI || | |
616 | request->op==TO_DSE || | |
617 | request->op==TO_WTM) | |
618 | return tape_34xx_erp_failed(request, -ENOSPC); | |
619 | return tape_34xx_erp_failed(request, -EIO); | |
620 | case 0x39: | |
621 | /* Backward at Beginning of tape. */ | |
622 | return tape_34xx_erp_failed(request, -EIO); | |
623 | case 0x3a: | |
624 | /* Drive switched to not ready. */ | |
ab640db0 | 625 | dev_warn (&device->cdev->dev, "The tape unit is not ready\n"); |
1da177e4 LT |
626 | return tape_34xx_erp_failed(request, -EIO); |
627 | case 0x3b: | |
628 | /* Manual rewind or unload. This causes an I/O error. */ | |
ab640db0 CO |
629 | dev_warn (&device->cdev->dev, "The tape medium has been " |
630 | "rewound or unloaded manually\n"); | |
1da177e4 LT |
631 | tape_34xx_delete_sbid_from(device, 0); |
632 | return tape_34xx_erp_failed(request, -EIO); | |
633 | case 0x42: | |
634 | /* | |
635 | * Degraded mode. A condition that can cause degraded | |
636 | * performance is detected. | |
637 | */ | |
ab640db0 CO |
638 | dev_warn (&device->cdev->dev, "The tape subsystem is running " |
639 | "in degraded mode\n"); | |
1da177e4 LT |
640 | return tape_34xx_erp_retry(request); |
641 | case 0x43: | |
642 | /* Drive not ready. */ | |
643 | tape_34xx_delete_sbid_from(device, 0); | |
644 | tape_med_state_set(device, MS_UNLOADED); | |
645 | /* Some commands commands are successful even in this case */ | |
646 | if (sense[1] & SENSE_DRIVE_ONLINE) { | |
647 | switch(request->op) { | |
648 | case TO_ASSIGN: | |
649 | case TO_UNASSIGN: | |
650 | case TO_DIS: | |
651 | case TO_NOP: | |
652 | return tape_34xx_done(request); | |
653 | break; | |
654 | default: | |
655 | break; | |
656 | } | |
657 | } | |
1da177e4 LT |
658 | return tape_34xx_erp_failed(request, -ENOMEDIUM); |
659 | case 0x44: | |
660 | /* Locate Block unsuccessful. */ | |
661 | if (request->op != TO_BLOCK && request->op != TO_LBL) | |
662 | /* No locate block was issued. */ | |
663 | return tape_34xx_erp_bug(device, request, | |
664 | irb, sense[3]); | |
665 | return tape_34xx_erp_failed(request, -EIO); | |
666 | case 0x45: | |
667 | /* The drive is assigned to a different channel path. */ | |
ab640db0 CO |
668 | dev_warn (&device->cdev->dev, "The tape unit is already " |
669 | "assigned\n"); | |
1da177e4 LT |
670 | return tape_34xx_erp_failed(request, -EIO); |
671 | case 0x46: | |
672 | /* | |
673 | * Drive not on-line. Drive may be switched offline, | |
674 | * the power supply may be switched off or | |
675 | * the drive address may not be set correctly. | |
676 | */ | |
ab640db0 | 677 | dev_warn (&device->cdev->dev, "The tape unit is not online\n"); |
1da177e4 LT |
678 | return tape_34xx_erp_failed(request, -EIO); |
679 | case 0x47: | |
680 | /* Volume fenced. CU reports volume integrity is lost. */ | |
ab640db0 CO |
681 | dev_warn (&device->cdev->dev, "The control unit has fenced " |
682 | "access to the tape volume\n"); | |
1da177e4 LT |
683 | tape_34xx_delete_sbid_from(device, 0); |
684 | return tape_34xx_erp_failed(request, -EIO); | |
685 | case 0x48: | |
686 | /* Log sense data and retry request. */ | |
687 | return tape_34xx_erp_retry(request); | |
688 | case 0x49: | |
689 | /* Bus out check. A parity check error on the bus was found. */ | |
ab640db0 CO |
690 | dev_warn (&device->cdev->dev, "A parity error occurred on the " |
691 | "tape bus\n"); | |
1da177e4 LT |
692 | return tape_34xx_erp_failed(request, -EIO); |
693 | case 0x4a: | |
694 | /* Control unit erp failed. */ | |
ab640db0 CO |
695 | dev_warn (&device->cdev->dev, "I/O error recovery failed on " |
696 | "the tape control unit\n"); | |
1da177e4 LT |
697 | return tape_34xx_erp_failed(request, -EIO); |
698 | case 0x4b: | |
699 | /* | |
700 | * CU and drive incompatible. The drive requests micro-program | |
701 | * patches, which are not available on the CU. | |
702 | */ | |
ab640db0 CO |
703 | dev_warn (&device->cdev->dev, "The tape unit requires a " |
704 | "firmware update\n"); | |
1da177e4 LT |
705 | return tape_34xx_erp_failed(request, -EIO); |
706 | case 0x4c: | |
707 | /* | |
708 | * Recovered Check-One failure. Cu develops a hardware error, | |
709 | * but is able to recover. | |
710 | */ | |
711 | return tape_34xx_erp_retry(request); | |
712 | case 0x4d: | |
713 | if (device->cdev->id.driver_info == tape_3490) | |
714 | /* | |
715 | * Resetting event received. Since the driver does | |
716 | * not support resetting event recovery (which has to | |
717 | * be handled by the I/O Layer), retry our command. | |
718 | */ | |
719 | return tape_34xx_erp_retry(request); | |
720 | /* This erpa is reserved for 3480. */ | |
721 | return tape_34xx_erp_bug(device, request, irb, sense[3]); | |
722 | case 0x4e: | |
723 | if (device->cdev->id.driver_info == tape_3490) { | |
724 | /* | |
725 | * Maximum block size exceeded. This indicates, that | |
726 | * the block to be written is larger than allowed for | |
727 | * buffered mode. | |
728 | */ | |
ab640db0 CO |
729 | dev_warn (&device->cdev->dev, "The maximum block size" |
730 | " for buffered mode is exceeded\n"); | |
1da177e4 LT |
731 | return tape_34xx_erp_failed(request, -ENOBUFS); |
732 | } | |
733 | /* This erpa is reserved for 3480. */ | |
734 | return tape_34xx_erp_bug(device, request, irb, sense[3]); | |
735 | case 0x50: | |
736 | /* | |
737 | * Read buffered log (Overflow). CU is running in extended | |
738 | * buffered log mode, and a counter overflows. This should | |
739 | * never happen, since we're never running in extended | |
740 | * buffered log mode. | |
741 | */ | |
742 | return tape_34xx_erp_retry(request); | |
743 | case 0x51: | |
744 | /* | |
745 | * Read buffered log (EOV). EOF processing occurs while the | |
746 | * CU is in extended buffered log mode. This should never | |
747 | * happen, since we're never running in extended buffered | |
748 | * log mode. | |
749 | */ | |
750 | return tape_34xx_erp_retry(request); | |
751 | case 0x52: | |
752 | /* End of Volume complete. Rewind unload completed ok. */ | |
753 | if (request->op == TO_RUN) { | |
754 | tape_med_state_set(device, MS_UNLOADED); | |
755 | tape_34xx_delete_sbid_from(device, 0); | |
756 | return tape_34xx_erp_succeeded(request); | |
757 | } | |
758 | return tape_34xx_erp_bug(device, request, irb, sense[3]); | |
759 | case 0x53: | |
760 | /* Global command intercept. */ | |
761 | return tape_34xx_erp_retry(request); | |
762 | case 0x54: | |
763 | /* Channel interface recovery (temporary). */ | |
764 | return tape_34xx_erp_retry(request); | |
765 | case 0x55: | |
766 | /* Channel interface recovery (permanent). */ | |
ab640db0 CO |
767 | dev_warn (&device->cdev->dev, "A channel interface error cannot be" |
768 | " recovered\n"); | |
1da177e4 LT |
769 | return tape_34xx_erp_failed(request, -EIO); |
770 | case 0x56: | |
771 | /* Channel protocol error. */ | |
ab640db0 CO |
772 | dev_warn (&device->cdev->dev, "A channel protocol error " |
773 | "occurred\n"); | |
1da177e4 LT |
774 | return tape_34xx_erp_failed(request, -EIO); |
775 | case 0x57: | |
776 | if (device->cdev->id.driver_info == tape_3480) { | |
777 | /* Attention intercept. */ | |
1da177e4 LT |
778 | return tape_34xx_erp_retry(request); |
779 | } else { | |
780 | /* Global status intercept. */ | |
1da177e4 LT |
781 | return tape_34xx_erp_retry(request); |
782 | } | |
783 | case 0x5a: | |
784 | /* | |
785 | * Tape length incompatible. The tape inserted is too long, | |
786 | * which could cause damage to the tape or the drive. | |
787 | */ | |
ab640db0 CO |
788 | dev_warn (&device->cdev->dev, "The tape unit does not support " |
789 | "the tape length\n"); | |
1da177e4 LT |
790 | return tape_34xx_erp_failed(request, -EIO); |
791 | case 0x5b: | |
792 | /* Format 3480 XF incompatible */ | |
793 | if (sense[1] & SENSE_BEGINNING_OF_TAPE) | |
794 | /* The tape will get overwritten. */ | |
795 | return tape_34xx_erp_retry(request); | |
ab640db0 CO |
796 | dev_warn (&device->cdev->dev, "The tape unit does not support" |
797 | " format 3480 XF\n"); | |
1da177e4 LT |
798 | return tape_34xx_erp_failed(request, -EIO); |
799 | case 0x5c: | |
800 | /* Format 3480-2 XF incompatible */ | |
ab640db0 CO |
801 | dev_warn (&device->cdev->dev, "The tape unit does not support tape " |
802 | "format 3480-2 XF\n"); | |
1da177e4 LT |
803 | return tape_34xx_erp_failed(request, -EIO); |
804 | case 0x5d: | |
805 | /* Tape length violation. */ | |
ab640db0 CO |
806 | dev_warn (&device->cdev->dev, "The tape unit does not support" |
807 | " the current tape length\n"); | |
1da177e4 LT |
808 | return tape_34xx_erp_failed(request, -EMEDIUMTYPE); |
809 | case 0x5e: | |
810 | /* Compaction algorithm incompatible. */ | |
ab640db0 CO |
811 | dev_warn (&device->cdev->dev, "The tape unit does not support" |
812 | " the compaction algorithm\n"); | |
1da177e4 LT |
813 | return tape_34xx_erp_failed(request, -EMEDIUMTYPE); |
814 | ||
815 | /* The following erpas should have been covered earlier. */ | |
816 | case 0x23: /* Read data check. */ | |
817 | case 0x25: /* Write data check. */ | |
818 | case 0x26: /* Data check (read opposite). */ | |
819 | case 0x28: /* Write id mark check. */ | |
820 | case 0x31: /* Tape void. */ | |
821 | case 0x40: /* Overrun error. */ | |
822 | case 0x41: /* Record sequence error. */ | |
823 | /* All other erpas are reserved for future use. */ | |
824 | default: | |
825 | return tape_34xx_erp_bug(device, request, irb, sense[3]); | |
826 | } | |
827 | } | |
828 | ||
829 | /* | |
830 | * 3480/3490 interrupt handler | |
831 | */ | |
832 | static int | |
833 | tape_34xx_irq(struct tape_device *device, struct tape_request *request, | |
834 | struct irb *irb) | |
835 | { | |
836 | if (request == NULL) | |
837 | return tape_34xx_unsolicited_irq(device, irb); | |
838 | ||
23d805b6 PO |
839 | if ((irb->scsw.cmd.dstat & DEV_STAT_UNIT_EXCEP) && |
840 | (irb->scsw.cmd.dstat & DEV_STAT_DEV_END) && | |
1da177e4 LT |
841 | (request->op == TO_WRI)) { |
842 | /* Write at end of volume */ | |
1da177e4 LT |
843 | return tape_34xx_erp_failed(request, -ENOSPC); |
844 | } | |
845 | ||
23d805b6 | 846 | if (irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK) |
1da177e4 LT |
847 | return tape_34xx_unit_check(device, request, irb); |
848 | ||
23d805b6 | 849 | if (irb->scsw.cmd.dstat & DEV_STAT_DEV_END) { |
1da177e4 LT |
850 | /* |
851 | * A unit exception occurs on skipping over a tapemark block. | |
852 | */ | |
23d805b6 | 853 | if (irb->scsw.cmd.dstat & DEV_STAT_UNIT_EXCEP) { |
1da177e4 LT |
854 | if (request->op == TO_BSB || request->op == TO_FSB) |
855 | request->rescnt++; | |
856 | else | |
857 | DBF_EVENT(5, "Unit Exception!\n"); | |
858 | } | |
859 | return tape_34xx_done(request); | |
860 | } | |
861 | ||
862 | DBF_EVENT(6, "xunknownirq\n"); | |
ab640db0 | 863 | tape_dump_sense_dbf(device, request, irb); |
1da177e4 LT |
864 | return TAPE_IO_STOP; |
865 | } | |
866 | ||
867 | /* | |
868 | * ioctl_overload | |
869 | */ | |
870 | static int | |
871 | tape_34xx_ioctl(struct tape_device *device, unsigned int cmd, unsigned long arg) | |
872 | { | |
873 | if (cmd == TAPE390_DISPLAY) { | |
874 | struct display_struct disp; | |
875 | ||
876 | if (copy_from_user(&disp, (char __user *) arg, sizeof(disp)) != 0) | |
877 | return -EFAULT; | |
878 | ||
879 | return tape_std_display(device, &disp); | |
880 | } else | |
881 | return -EINVAL; | |
882 | } | |
883 | ||
884 | static inline void | |
885 | tape_34xx_append_new_sbid(struct tape_34xx_block_id bid, struct list_head *l) | |
886 | { | |
887 | struct tape_34xx_sbid * new_sbid; | |
888 | ||
889 | new_sbid = kmalloc(sizeof(*new_sbid), GFP_ATOMIC); | |
890 | if (!new_sbid) | |
891 | return; | |
892 | ||
893 | new_sbid->bid = bid; | |
894 | list_add(&new_sbid->list, l); | |
895 | } | |
896 | ||
897 | /* | |
898 | * Build up the search block ID list. The block ID consists of a logical | |
899 | * block number and a hardware specific part. The hardware specific part | |
900 | * helps the tape drive to speed up searching for a specific block. | |
901 | */ | |
902 | static void | |
903 | tape_34xx_add_sbid(struct tape_device *device, struct tape_34xx_block_id bid) | |
904 | { | |
905 | struct list_head * sbid_list; | |
906 | struct tape_34xx_sbid * sbid; | |
907 | struct list_head * l; | |
908 | ||
909 | /* | |
910 | * immediately return if there is no list at all or the block to add | |
911 | * is located in segment 1 of wrap 0 because this position is used | |
912 | * if no hardware position data is supplied. | |
913 | */ | |
914 | sbid_list = (struct list_head *) device->discdata; | |
915 | if (!sbid_list || (bid.segment < 2 && bid.wrap == 0)) | |
916 | return; | |
917 | ||
918 | /* | |
919 | * Search the position where to insert the new entry. Hardware | |
920 | * acceleration uses only the segment and wrap number. So we | |
921 | * need only one entry for a specific wrap/segment combination. | |
922 | * If there is a block with a lower number but the same hard- | |
923 | * ware position data we just update the block number in the | |
924 | * existing entry. | |
925 | */ | |
926 | list_for_each(l, sbid_list) { | |
927 | sbid = list_entry(l, struct tape_34xx_sbid, list); | |
928 | ||
929 | if ( | |
930 | (sbid->bid.segment == bid.segment) && | |
931 | (sbid->bid.wrap == bid.wrap) | |
932 | ) { | |
933 | if (bid.block < sbid->bid.block) | |
934 | sbid->bid = bid; | |
935 | else return; | |
936 | break; | |
937 | } | |
938 | ||
939 | /* Sort in according to logical block number. */ | |
940 | if (bid.block < sbid->bid.block) { | |
941 | tape_34xx_append_new_sbid(bid, l->prev); | |
942 | break; | |
943 | } | |
944 | } | |
945 | /* List empty or new block bigger than last entry. */ | |
946 | if (l == sbid_list) | |
947 | tape_34xx_append_new_sbid(bid, l->prev); | |
948 | ||
949 | DBF_LH(4, "Current list is:\n"); | |
950 | list_for_each(l, sbid_list) { | |
951 | sbid = list_entry(l, struct tape_34xx_sbid, list); | |
952 | DBF_LH(4, "%d:%03d@%05d\n", | |
953 | sbid->bid.wrap, | |
954 | sbid->bid.segment, | |
955 | sbid->bid.block | |
956 | ); | |
957 | } | |
958 | } | |
959 | ||
960 | /* | |
961 | * Delete all entries from the search block ID list that belong to tape blocks | |
962 | * equal or higher than the given number. | |
963 | */ | |
964 | static void | |
965 | tape_34xx_delete_sbid_from(struct tape_device *device, int from) | |
966 | { | |
967 | struct list_head * sbid_list; | |
968 | struct tape_34xx_sbid * sbid; | |
969 | struct list_head * l; | |
970 | struct list_head * n; | |
971 | ||
972 | sbid_list = (struct list_head *) device->discdata; | |
973 | if (!sbid_list) | |
974 | return; | |
975 | ||
976 | list_for_each_safe(l, n, sbid_list) { | |
977 | sbid = list_entry(l, struct tape_34xx_sbid, list); | |
978 | if (sbid->bid.block >= from) { | |
979 | DBF_LH(4, "Delete sbid %d:%03d@%05d\n", | |
980 | sbid->bid.wrap, | |
981 | sbid->bid.segment, | |
982 | sbid->bid.block | |
983 | ); | |
984 | list_del(l); | |
985 | kfree(sbid); | |
986 | } | |
987 | } | |
988 | } | |
989 | ||
990 | /* | |
991 | * Merge hardware position data into a block id. | |
992 | */ | |
993 | static void | |
994 | tape_34xx_merge_sbid( | |
995 | struct tape_device * device, | |
996 | struct tape_34xx_block_id * bid | |
997 | ) { | |
998 | struct tape_34xx_sbid * sbid; | |
999 | struct tape_34xx_sbid * sbid_to_use; | |
1000 | struct list_head * sbid_list; | |
1001 | struct list_head * l; | |
1002 | ||
1003 | sbid_list = (struct list_head *) device->discdata; | |
1004 | bid->wrap = 0; | |
1005 | bid->segment = 1; | |
1006 | ||
1007 | if (!sbid_list || list_empty(sbid_list)) | |
1008 | return; | |
1009 | ||
1010 | sbid_to_use = NULL; | |
1011 | list_for_each(l, sbid_list) { | |
1012 | sbid = list_entry(l, struct tape_34xx_sbid, list); | |
1013 | ||
1014 | if (sbid->bid.block >= bid->block) | |
1015 | break; | |
1016 | sbid_to_use = sbid; | |
1017 | } | |
1018 | if (sbid_to_use) { | |
1019 | bid->wrap = sbid_to_use->bid.wrap; | |
1020 | bid->segment = sbid_to_use->bid.segment; | |
1021 | DBF_LH(4, "Use %d:%03d@%05d for %05d\n", | |
1022 | sbid_to_use->bid.wrap, | |
1023 | sbid_to_use->bid.segment, | |
1024 | sbid_to_use->bid.block, | |
1025 | bid->block | |
1026 | ); | |
1027 | } | |
1028 | } | |
1029 | ||
1030 | static int | |
1031 | tape_34xx_setup_device(struct tape_device * device) | |
1032 | { | |
1033 | int rc; | |
1034 | struct list_head * discdata; | |
1035 | ||
1036 | DBF_EVENT(6, "34xx device setup\n"); | |
1037 | if ((rc = tape_std_assign(device)) == 0) { | |
1038 | if ((rc = tape_34xx_medium_sense(device)) != 0) { | |
1039 | DBF_LH(3, "34xx medium sense returned %d\n", rc); | |
1040 | } | |
1041 | } | |
1042 | discdata = kmalloc(sizeof(struct list_head), GFP_KERNEL); | |
1043 | if (discdata) { | |
1044 | INIT_LIST_HEAD(discdata); | |
1045 | device->discdata = discdata; | |
1046 | } | |
1047 | ||
1048 | return rc; | |
1049 | } | |
1050 | ||
1051 | static void | |
1052 | tape_34xx_cleanup_device(struct tape_device *device) | |
1053 | { | |
1054 | tape_std_unassign(device); | |
1055 | ||
1056 | if (device->discdata) { | |
1057 | tape_34xx_delete_sbid_from(device, 0); | |
1058 | kfree(device->discdata); | |
1059 | device->discdata = NULL; | |
1060 | } | |
1061 | } | |
1062 | ||
1063 | ||
1064 | /* | |
1065 | * MTTELL: Tell block. Return the number of block relative to current file. | |
1066 | */ | |
1067 | static int | |
1068 | tape_34xx_mttell(struct tape_device *device, int mt_count) | |
1069 | { | |
1070 | struct { | |
1071 | struct tape_34xx_block_id cbid; | |
1072 | struct tape_34xx_block_id dbid; | |
1073 | } __attribute__ ((packed)) block_id; | |
1074 | int rc; | |
1075 | ||
1076 | rc = tape_std_read_block_id(device, (__u64 *) &block_id); | |
1077 | if (rc) | |
1078 | return rc; | |
1079 | ||
1080 | tape_34xx_add_sbid(device, block_id.cbid); | |
1081 | return block_id.cbid.block; | |
1082 | } | |
1083 | ||
1084 | /* | |
1085 | * MTSEEK: seek to the specified block. | |
1086 | */ | |
1087 | static int | |
1088 | tape_34xx_mtseek(struct tape_device *device, int mt_count) | |
1089 | { | |
1090 | struct tape_request *request; | |
1091 | struct tape_34xx_block_id * bid; | |
1092 | ||
1093 | if (mt_count > 0x3fffff) { | |
1094 | DBF_EXCEPTION(6, "xsee parm\n"); | |
1095 | return -EINVAL; | |
1096 | } | |
1097 | request = tape_alloc_request(3, 4); | |
1098 | if (IS_ERR(request)) | |
1099 | return PTR_ERR(request); | |
1100 | ||
1101 | /* setup ccws */ | |
1102 | request->op = TO_LBL; | |
1103 | bid = (struct tape_34xx_block_id *) request->cpdata; | |
1104 | bid->format = (*device->modeset_byte & 0x08) ? | |
1105 | TAPE34XX_FMT_3480_XF : TAPE34XX_FMT_3480; | |
1106 | bid->block = mt_count; | |
1107 | tape_34xx_merge_sbid(device, bid); | |
1108 | ||
1109 | tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1, device->modeset_byte); | |
1110 | tape_ccw_cc(request->cpaddr + 1, LOCATE, 4, request->cpdata); | |
1111 | tape_ccw_end(request->cpaddr + 2, NOP, 0, NULL); | |
1112 | ||
1113 | /* execute it */ | |
1114 | return tape_do_io_free(device, request); | |
1115 | } | |
1116 | ||
1da177e4 LT |
1117 | /* |
1118 | * List of 3480/3490 magnetic tape commands. | |
1119 | */ | |
1120 | static tape_mtop_fn tape_34xx_mtop[TAPE_NR_MTOPS] = { | |
1121 | [MTRESET] = tape_std_mtreset, | |
1122 | [MTFSF] = tape_std_mtfsf, | |
1123 | [MTBSF] = tape_std_mtbsf, | |
1124 | [MTFSR] = tape_std_mtfsr, | |
1125 | [MTBSR] = tape_std_mtbsr, | |
1126 | [MTWEOF] = tape_std_mtweof, | |
1127 | [MTREW] = tape_std_mtrew, | |
1128 | [MTOFFL] = tape_std_mtoffl, | |
1129 | [MTNOP] = tape_std_mtnop, | |
1130 | [MTRETEN] = tape_std_mtreten, | |
1131 | [MTBSFM] = tape_std_mtbsfm, | |
1132 | [MTFSFM] = tape_std_mtfsfm, | |
1133 | [MTEOM] = tape_std_mteom, | |
1134 | [MTERASE] = tape_std_mterase, | |
1135 | [MTRAS1] = NULL, | |
1136 | [MTRAS2] = NULL, | |
1137 | [MTRAS3] = NULL, | |
1138 | [MTSETBLK] = tape_std_mtsetblk, | |
1139 | [MTSETDENSITY] = NULL, | |
1140 | [MTSEEK] = tape_34xx_mtseek, | |
1141 | [MTTELL] = tape_34xx_mttell, | |
1142 | [MTSETDRVBUFFER] = NULL, | |
1143 | [MTFSS] = NULL, | |
1144 | [MTBSS] = NULL, | |
1145 | [MTWSM] = NULL, | |
1146 | [MTLOCK] = NULL, | |
1147 | [MTUNLOCK] = NULL, | |
1148 | [MTLOAD] = tape_std_mtload, | |
1149 | [MTUNLOAD] = tape_std_mtunload, | |
1150 | [MTCOMPRESSION] = tape_std_mtcompression, | |
1151 | [MTSETPART] = NULL, | |
1152 | [MTMKPART] = NULL | |
1153 | }; | |
1154 | ||
1155 | /* | |
1156 | * Tape discipline structure for 3480 and 3490. | |
1157 | */ | |
1158 | static struct tape_discipline tape_discipline_34xx = { | |
1159 | .owner = THIS_MODULE, | |
1160 | .setup_device = tape_34xx_setup_device, | |
1161 | .cleanup_device = tape_34xx_cleanup_device, | |
1162 | .process_eov = tape_std_process_eov, | |
1163 | .irq = tape_34xx_irq, | |
1164 | .read_block = tape_std_read_block, | |
1165 | .write_block = tape_std_write_block, | |
1da177e4 LT |
1166 | .ioctl_fn = tape_34xx_ioctl, |
1167 | .mtop_array = tape_34xx_mtop | |
1168 | }; | |
1169 | ||
1170 | static struct ccw_device_id tape_34xx_ids[] = { | |
d2c993d8 HC |
1171 | { CCW_DEVICE_DEVTYPE(0x3480, 0, 0x3480, 0), .driver_info = tape_3480}, |
1172 | { CCW_DEVICE_DEVTYPE(0x3490, 0, 0x3490, 0), .driver_info = tape_3490}, | |
1173 | { /* end of list */ }, | |
1da177e4 LT |
1174 | }; |
1175 | ||
1176 | static int | |
1177 | tape_34xx_online(struct ccw_device *cdev) | |
1178 | { | |
1179 | return tape_generic_online( | |
dff59b64 | 1180 | dev_get_drvdata(&cdev->dev), |
1da177e4 LT |
1181 | &tape_discipline_34xx |
1182 | ); | |
1183 | } | |
1184 | ||
1da177e4 | 1185 | static struct ccw_driver tape_34xx_driver = { |
3bda058b SO |
1186 | .driver = { |
1187 | .name = "tape_34xx", | |
1188 | .owner = THIS_MODULE, | |
1189 | }, | |
1da177e4 LT |
1190 | .ids = tape_34xx_ids, |
1191 | .probe = tape_generic_probe, | |
1192 | .remove = tape_generic_remove, | |
1193 | .set_online = tape_34xx_online, | |
4d7a3cdf | 1194 | .set_offline = tape_generic_offline, |
3ef32e62 | 1195 | .freeze = tape_generic_pm_suspend, |
420f42ec | 1196 | .int_class = IRQIO_TAP, |
1da177e4 LT |
1197 | }; |
1198 | ||
1199 | static int | |
1200 | tape_34xx_init (void) | |
1201 | { | |
1202 | int rc; | |
1203 | ||
66a464db | 1204 | TAPE_DBF_AREA = debug_register ( "tape_34xx", 2, 2, 4*sizeof(long)); |
1da177e4 LT |
1205 | debug_register_view(TAPE_DBF_AREA, &debug_sprintf_view); |
1206 | #ifdef DBF_LIKE_HELL | |
1207 | debug_set_level(TAPE_DBF_AREA, 6); | |
1208 | #endif | |
1209 | ||
e018ba1f | 1210 | DBF_EVENT(3, "34xx init\n"); |
1da177e4 LT |
1211 | /* Register driver for 3480/3490 tapes. */ |
1212 | rc = ccw_driver_register(&tape_34xx_driver); | |
1213 | if (rc) | |
1214 | DBF_EVENT(3, "34xx init failed\n"); | |
1215 | else | |
1216 | DBF_EVENT(3, "34xx registered\n"); | |
1217 | return rc; | |
1218 | } | |
1219 | ||
1220 | static void | |
1221 | tape_34xx_exit(void) | |
1222 | { | |
1223 | ccw_driver_unregister(&tape_34xx_driver); | |
1224 | ||
1225 | debug_unregister(TAPE_DBF_AREA); | |
1226 | } | |
1227 | ||
1228 | MODULE_DEVICE_TABLE(ccw, tape_34xx_ids); | |
1229 | MODULE_AUTHOR("(C) 2001-2002 IBM Deutschland Entwicklung GmbH"); | |
e018ba1f | 1230 | MODULE_DESCRIPTION("Linux on zSeries channel attached 3480 tape device driver"); |
1da177e4 LT |
1231 | MODULE_LICENSE("GPL"); |
1232 | ||
1233 | module_init(tape_34xx_init); | |
1234 | module_exit(tape_34xx_exit); |