Merge master.kernel.org:/pub/scm/linux/kernel/git/davem/sparc-2.6
[linux-2.6] / drivers / s390 / char / tape_3590.c
1 /*
2  *  drivers/s390/char/tape_3590.c
3  *    tape device discipline for 3590 tapes.
4  *
5  *    Copyright (C) IBM Corp. 2001,2006
6  *    Author(s): Stefan Bader <shbader@de.ibm.com>
7  *               Michael Holzheu <holzheu@de.ibm.com>
8  *               Martin Schwidefsky <schwidefsky@de.ibm.com>
9  */
10
11 #include <linux/config.h>
12 #include <linux/module.h>
13 #include <linux/init.h>
14 #include <linux/bio.h>
15
16 #define TAPE_DBF_AREA   tape_3590_dbf
17
18 #include "tape.h"
19 #include "tape_std.h"
20 #include "tape_3590.h"
21
22 /*
23  * Pointer to debug area.
24  */
25 debug_info_t *TAPE_DBF_AREA = NULL;
26 EXPORT_SYMBOL(TAPE_DBF_AREA);
27
28 /*******************************************************************
29  * Error Recovery fuctions:
30  * - Read Opposite:              implemented
31  * - Read Device (buffered) log: BRA
32  * - Read Library log:           BRA
33  * - Swap Devices:               BRA
34  * - Long Busy:                  BRA
35  * - Special Intercept:          BRA
36  * - Read Alternate:             implemented
37  *******************************************************************/
38
39 #define PRINTK_HEADER "TAPE_3590: "
40
41 static const char *tape_3590_msg[TAPE_3590_MAX_MSG] = {
42         [0x00] = "",
43         [0x10] = "Lost Sense",
44         [0x11] = "Assigned Elsewhere",
45         [0x12] = "Allegiance Reset",
46         [0x13] = "Shared Access Violation",
47         [0x20] = "Command Reject",
48         [0x21] = "Configuration Error",
49         [0x22] = "Protection Exception",
50         [0x23] = "Write Protect",
51         [0x24] = "Write Length",
52         [0x25] = "Read-Only Format",
53         [0x31] = "Beginning of Partition",
54         [0x33] = "End of Partition",
55         [0x34] = "End of Data",
56         [0x35] = "Block not found",
57         [0x40] = "Device Intervention",
58         [0x41] = "Loader Intervention",
59         [0x42] = "Library Intervention",
60         [0x50] = "Write Error",
61         [0x51] = "Erase Error",
62         [0x52] = "Formatting Error",
63         [0x53] = "Read Error",
64         [0x54] = "Unsupported Format",
65         [0x55] = "No Formatting",
66         [0x56] = "Positioning lost",
67         [0x57] = "Read Length",
68         [0x60] = "Unsupported Medium",
69         [0x61] = "Medium Length Error",
70         [0x62] = "Medium removed",
71         [0x64] = "Load Check",
72         [0x65] = "Unload Check",
73         [0x70] = "Equipment Check",
74         [0x71] = "Bus out Check",
75         [0x72] = "Protocol Error",
76         [0x73] = "Interface Error",
77         [0x74] = "Overrun",
78         [0x75] = "Halt Signal",
79         [0x90] = "Device fenced",
80         [0x91] = "Device Path fenced",
81         [0xa0] = "Volume misplaced",
82         [0xa1] = "Volume inaccessible",
83         [0xa2] = "Volume in input",
84         [0xa3] = "Volume ejected",
85         [0xa4] = "All categories reserved",
86         [0xa5] = "Duplicate Volume",
87         [0xa6] = "Library Manager Offline",
88         [0xa7] = "Library Output Station full",
89         [0xa8] = "Vision System non-operational",
90         [0xa9] = "Library Manager Equipment Check",
91         [0xaa] = "Library Equipment Check",
92         [0xab] = "All Library Cells full",
93         [0xac] = "No Cleaner Volumes in Library",
94         [0xad] = "I/O Station door open",
95         [0xae] = "Subsystem environmental alert",
96 };
97
98 /*
99  * 3590 IOCTL Overload
100  */
101 static int
102 tape_3590_ioctl(struct tape_device *device, unsigned int cmd, unsigned long arg)
103 {
104         switch (cmd) {
105         case TAPE390_DISPLAY: {
106                 struct display_struct disp;
107
108                 if (copy_from_user(&disp, (char __user *) arg, sizeof(disp)))
109                         return -EFAULT;
110
111                 return tape_std_display(device, &disp);
112         }
113         default:
114                 return -EINVAL; /* no additional ioctls */
115         }
116 }
117
118 /*
119  * SENSE Medium: Get Sense data about medium state
120  */
121 static int
122 tape_3590_sense_medium(struct tape_device *device)
123 {
124         struct tape_request *request;
125
126         request = tape_alloc_request(1, 128);
127         if (IS_ERR(request))
128                 return PTR_ERR(request);
129         request->op = TO_MSEN;
130         tape_ccw_end(request->cpaddr, MEDIUM_SENSE, 128, request->cpdata);
131         return tape_do_io_free(device, request);
132 }
133
134 /*
135  * MTTELL: Tell block. Return the number of block relative to current file.
136  */
137 static int
138 tape_3590_mttell(struct tape_device *device, int mt_count)
139 {
140         __u64 block_id;
141         int rc;
142
143         rc = tape_std_read_block_id(device, &block_id);
144         if (rc)
145                 return rc;
146         return block_id >> 32;
147 }
148
149 /*
150  * MTSEEK: seek to the specified block.
151  */
152 static int
153 tape_3590_mtseek(struct tape_device *device, int count)
154 {
155         struct tape_request *request;
156
157         DBF_EVENT(6, "xsee id: %x\n", count);
158         request = tape_alloc_request(3, 4);
159         if (IS_ERR(request))
160                 return PTR_ERR(request);
161         request->op = TO_LBL;
162         tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1, device->modeset_byte);
163         *(__u32 *) request->cpdata = count;
164         tape_ccw_cc(request->cpaddr + 1, LOCATE, 4, request->cpdata);
165         tape_ccw_end(request->cpaddr + 2, NOP, 0, NULL);
166         return tape_do_io_free(device, request);
167 }
168
169 /*
170  * Read Opposite Error Recovery Function:
171  * Used, when Read Forward does not work
172  */
173 static void
174 tape_3590_read_opposite(struct tape_device *device,
175                         struct tape_request *request)
176 {
177         struct tape_3590_disc_data *data;
178
179         /*
180          * We have allocated 4 ccws in tape_std_read, so we can now
181          * transform the request to a read backward, followed by a
182          * forward space block.
183          */
184         request->op = TO_RBA;
185         tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1, device->modeset_byte);
186         data = device->discdata;
187         tape_ccw_cc_idal(request->cpaddr + 1, data->read_back_op,
188                          device->char_data.idal_buf);
189         tape_ccw_cc(request->cpaddr + 2, FORSPACEBLOCK, 0, NULL);
190         tape_ccw_end(request->cpaddr + 3, NOP, 0, NULL);
191         DBF_EVENT(6, "xrop ccwg\n");
192 }
193
194 /*
195  * Read Attention Msg
196  * This should be done after an interrupt with attention bit (0x80)
197  * in device state.
198  *
199  * After a "read attention message" request there are two possible
200  * results:
201  *
202  * 1. A unit check is presented, when attention sense is present (e.g. when
203  * a medium has been unloaded). The attention sense comes then
204  * together with the unit check. The recovery action is either "retry"
205  * (in case there is an attention message pending) or "permanent error".
206  *
207  * 2. The attention msg is written to the "read subsystem data" buffer.
208  * In this case we probably should print it to the console.
209  */
210 static int
211 tape_3590_read_attmsg(struct tape_device *device)
212 {
213         struct tape_request *request;
214         char *buf;
215
216         request = tape_alloc_request(3, 4096);
217         if (IS_ERR(request))
218                 return PTR_ERR(request);
219         request->op = TO_READ_ATTMSG;
220         buf = request->cpdata;
221         buf[0] = PREP_RD_SS_DATA;
222         buf[6] = RD_ATTMSG;     /* read att msg */
223         tape_ccw_cc(request->cpaddr, PERFORM_SS_FUNC, 12, buf);
224         tape_ccw_cc(request->cpaddr + 1, READ_SS_DATA, 4096 - 12, buf + 12);
225         tape_ccw_end(request->cpaddr + 2, NOP, 0, NULL);
226         return tape_do_io_free(device, request);
227 }
228
229 /*
230  * These functions are used to schedule follow-up actions from within an
231  * interrupt context (like unsolicited interrupts).
232  */
233 struct work_handler_data {
234         struct tape_device *device;
235         enum tape_op        op;
236         struct work_struct  work;
237 };
238
239 static void
240 tape_3590_work_handler(void *data)
241 {
242         struct work_handler_data *p = data;
243
244         switch (p->op) {
245         case TO_MSEN:
246                 tape_3590_sense_medium(p->device);
247                 break;
248         case TO_READ_ATTMSG:
249                 tape_3590_read_attmsg(p->device);
250                 break;
251         default:
252                 DBF_EVENT(3, "T3590: work handler undefined for "
253                           "operation 0x%02x\n", p->op);
254         }
255         tape_put_device(p->device);
256         kfree(p);
257 }
258
259 static int
260 tape_3590_schedule_work(struct tape_device *device, enum tape_op op)
261 {
262         struct work_handler_data *p;
263
264         if ((p = kzalloc(sizeof(*p), GFP_ATOMIC)) == NULL)
265                 return -ENOMEM;
266
267         INIT_WORK(&p->work, tape_3590_work_handler, p);
268
269         p->device = tape_get_device_reference(device);
270         p->op = op;
271
272         schedule_work(&p->work);
273         return 0;
274 }
275
276 #ifdef CONFIG_S390_TAPE_BLOCK
277 /*
278  * Tape Block READ
279  */
280 static struct tape_request *
281 tape_3590_bread(struct tape_device *device, struct request *req)
282 {
283         struct tape_request *request;
284         struct ccw1 *ccw;
285         int count = 0, start_block, i;
286         unsigned off;
287         char *dst;
288         struct bio_vec *bv;
289         struct bio *bio;
290
291         DBF_EVENT(6, "xBREDid:");
292         start_block = req->sector >> TAPEBLOCK_HSEC_S2B;
293         DBF_EVENT(6, "start_block = %i\n", start_block);
294
295         rq_for_each_bio(bio, req) {
296                 bio_for_each_segment(bv, bio, i) {
297                         count += bv->bv_len >> (TAPEBLOCK_HSEC_S2B + 9);
298                 }
299         }
300         request = tape_alloc_request(2 + count + 1, 4);
301         if (IS_ERR(request))
302                 return request;
303         request->op = TO_BLOCK;
304         *(__u32 *) request->cpdata = start_block;
305         ccw = request->cpaddr;
306         ccw = tape_ccw_cc(ccw, MODE_SET_DB, 1, device->modeset_byte);
307
308         /*
309          * We always setup a nop after the mode set ccw. This slot is
310          * used in tape_std_check_locate to insert a locate ccw if the
311          * current tape position doesn't match the start block to be read.
312          */
313         ccw = tape_ccw_cc(ccw, NOP, 0, NULL);
314
315         rq_for_each_bio(bio, req) {
316                 bio_for_each_segment(bv, bio, i) {
317                         dst = page_address(bv->bv_page) + bv->bv_offset;
318                         for (off = 0; off < bv->bv_len;
319                              off += TAPEBLOCK_HSEC_SIZE) {
320                                 ccw->flags = CCW_FLAG_CC;
321                                 ccw->cmd_code = READ_FORWARD;
322                                 ccw->count = TAPEBLOCK_HSEC_SIZE;
323                                 set_normalized_cda(ccw, (void *) __pa(dst));
324                                 ccw++;
325                                 dst += TAPEBLOCK_HSEC_SIZE;
326                         }
327                         if (off > bv->bv_len)
328                                 BUG();
329                 }
330         }
331         ccw = tape_ccw_end(ccw, NOP, 0, NULL);
332         DBF_EVENT(6, "xBREDccwg\n");
333         return request;
334 }
335
336 static void
337 tape_3590_free_bread(struct tape_request *request)
338 {
339         struct ccw1 *ccw;
340
341         /* Last ccw is a nop and doesn't need clear_normalized_cda */
342         for (ccw = request->cpaddr; ccw->flags & CCW_FLAG_CC; ccw++)
343                 if (ccw->cmd_code == READ_FORWARD)
344                         clear_normalized_cda(ccw);
345         tape_free_request(request);
346 }
347
348 /*
349  * check_locate is called just before the tape request is passed to
350  * the common io layer for execution. It has to check the current
351  * tape position and insert a locate ccw if it doesn't match the
352  * start block for the request.
353  */
354 static void
355 tape_3590_check_locate(struct tape_device *device, struct tape_request *request)
356 {
357         __u32 *start_block;
358
359         start_block = (__u32 *) request->cpdata;
360         if (*start_block != device->blk_data.block_position) {
361                 /* Add the start offset of the file to get the real block. */
362                 *start_block += device->bof;
363                 tape_ccw_cc(request->cpaddr + 1, LOCATE, 4, request->cpdata);
364         }
365 }
366 #endif
367
368 /*
369  * The done handler is called at device/channel end and wakes up the sleeping
370  * process
371  */
372 static int
373 tape_3590_done(struct tape_device *device, struct tape_request *request)
374 {
375         struct tape_3590_med_sense *sense;
376
377         DBF_EVENT(6, "%s done\n", tape_op_verbose[request->op]);
378
379         switch (request->op) {
380         case TO_BSB:
381         case TO_BSF:
382         case TO_DSE:
383         case TO_FSB:
384         case TO_FSF:
385         case TO_LBL:
386         case TO_RFO:
387         case TO_RBA:
388         case TO_REW:
389         case TO_WRI:
390         case TO_WTM:
391         case TO_BLOCK:
392         case TO_LOAD:
393                 tape_med_state_set(device, MS_LOADED);
394                 break;
395         case TO_RUN:
396                 tape_med_state_set(device, MS_UNLOADED);
397                 break;
398         case TO_MSEN:
399                 sense = (struct tape_3590_med_sense *) request->cpdata;
400                 if (sense->masst == MSENSE_UNASSOCIATED)
401                         tape_med_state_set(device, MS_UNLOADED);
402                 if (sense->masst == MSENSE_ASSOCIATED_MOUNT)
403                         tape_med_state_set(device, MS_LOADED);
404                 break;
405         case TO_RBI:    /* RBI seems to succeed even without medium loaded. */
406         case TO_NOP:    /* Same to NOP. */
407         case TO_READ_CONFIG:
408         case TO_READ_ATTMSG:
409         case TO_DIS:
410         case TO_ASSIGN:
411         case TO_UNASSIGN:
412                 break;
413         case TO_SIZE:
414                 break;
415         }
416         return TAPE_IO_SUCCESS;
417 }
418
419 /*
420  * This fuction is called, when error recovery was successfull
421  */
422 static inline int
423 tape_3590_erp_succeded(struct tape_device *device, struct tape_request *request)
424 {
425         DBF_EVENT(3, "Error Recovery successfull for %s\n",
426                   tape_op_verbose[request->op]);
427         return tape_3590_done(device, request);
428 }
429
430 /*
431  * This fuction is called, when error recovery was not successfull
432  */
433 static inline int
434 tape_3590_erp_failed(struct tape_device *device, struct tape_request *request,
435                      struct irb *irb, int rc)
436 {
437         DBF_EVENT(3, "Error Recovery failed for %s\n",
438                   tape_op_verbose[request->op]);
439         tape_dump_sense_dbf(device, request, irb);
440         return rc;
441 }
442
443 /*
444  * Error Recovery do retry
445  */
446 static inline int
447 tape_3590_erp_retry(struct tape_device *device, struct tape_request *request,
448                     struct irb *irb)
449 {
450         DBF_EVENT(2, "Retry: %s\n", tape_op_verbose[request->op]);
451         tape_dump_sense_dbf(device, request, irb);
452         return TAPE_IO_RETRY;
453 }
454
455 /*
456  * Handle unsolicited interrupts
457  */
458 static int
459 tape_3590_unsolicited_irq(struct tape_device *device, struct irb *irb)
460 {
461         if (irb->scsw.dstat == DEV_STAT_CHN_END)
462                 /* Probably result of halt ssch */
463                 return TAPE_IO_PENDING;
464         else if (irb->scsw.dstat == 0x85)
465                 /* Device Ready -> check medium state */
466                 tape_3590_schedule_work(device, TO_MSEN);
467         else if (irb->scsw.dstat & DEV_STAT_ATTENTION)
468                 tape_3590_schedule_work(device, TO_READ_ATTMSG);
469         else {
470                 DBF_EVENT(3, "unsol.irq! dev end: %08x\n", device->cdev_id);
471                 PRINT_WARN("Unsolicited IRQ (Device End) caught.\n");
472                 tape_dump_sense(device, NULL, irb);
473         }
474         return TAPE_IO_SUCCESS;
475 }
476
477 /*
478  * Basic Recovery routine
479  */
480 static int
481 tape_3590_erp_basic(struct tape_device *device, struct tape_request *request,
482                     struct irb *irb, int rc)
483 {
484         struct tape_3590_sense *sense;
485
486         sense = (struct tape_3590_sense *) irb->ecw;
487
488         switch (sense->bra) {
489         case SENSE_BRA_PER:
490                 return tape_3590_erp_failed(device, request, irb, rc);
491         case SENSE_BRA_CONT:
492                 return tape_3590_erp_succeded(device, request);
493         case SENSE_BRA_RE:
494                 return tape_3590_erp_retry(device, request, irb);
495         case SENSE_BRA_DRE:
496                 return tape_3590_erp_failed(device, request, irb, rc);
497         default:
498                 PRINT_ERR("Unknown BRA %x - This should not happen!\n",
499                           sense->bra);
500                 BUG();
501                 return TAPE_IO_STOP;
502         }
503 }
504
505 /*
506  *  RDL: Read Device (buffered) log
507  */
508 static int
509 tape_3590_erp_read_buf_log(struct tape_device *device,
510                            struct tape_request *request, struct irb *irb)
511 {
512         /*
513          * We just do the basic error recovery at the moment (retry).
514          * Perhaps in the future, we read the log and dump it somewhere...
515          */
516         return tape_3590_erp_basic(device, request, irb, -EIO);
517 }
518
519 /*
520  *  SWAP: Swap Devices
521  */
522 static int
523 tape_3590_erp_swap(struct tape_device *device, struct tape_request *request,
524                    struct irb *irb)
525 {
526         /*
527          * This error recovery should swap the tapes
528          * if the original has a problem. The operation
529          * should proceed with the new tape... this
530          * should probably be done in user space!
531          */
532         PRINT_WARN("(%s): Swap Tape Device!\n", device->cdev->dev.bus_id);
533         return tape_3590_erp_basic(device, request, irb, -EIO);
534 }
535
536 /*
537  *  LBY: Long Busy
538  */
539 static int
540 tape_3590_erp_long_busy(struct tape_device *device,
541                         struct tape_request *request, struct irb *irb)
542 {
543         /* FIXME: how about WAITING for a minute ? */
544         PRINT_WARN("(%s): Device is busy! Please wait a minute!\n",
545                    device->cdev->dev.bus_id);
546         return tape_3590_erp_basic(device, request, irb, -EBUSY);
547 }
548
549 /*
550  *  SPI: Special Intercept
551  */
552 static int
553 tape_3590_erp_special_interrupt(struct tape_device *device,
554                                 struct tape_request *request, struct irb *irb)
555 {
556         return tape_3590_erp_basic(device, request, irb, -EIO);
557 }
558
559 /*
560  *  RDA: Read Alternate
561  */
562 static int
563 tape_3590_erp_read_alternate(struct tape_device *device,
564                              struct tape_request *request, struct irb *irb)
565 {
566         struct tape_3590_disc_data *data;
567
568         /*
569          * The issued Read Backward or Read Previous command is not
570          * supported by the device
571          * The recovery action should be to issue another command:
572          * Read Revious: if Read Backward is not supported
573          * Read Backward: if Read Previous is not supported
574          */
575         data = device->discdata;
576         if (data->read_back_op == READ_PREVIOUS) {
577                 DBF_EVENT(2, "(%08x): No support for READ_PREVIOUS command\n",
578                           device->cdev_id);
579                 data->read_back_op = READ_BACKWARD;
580         } else {
581                 DBF_EVENT(2, "(%08x): No support for READ_BACKWARD command\n",
582                           device->cdev_id);
583                 data->read_back_op = READ_PREVIOUS;
584         }
585         tape_3590_read_opposite(device, request);
586         return tape_3590_erp_retry(device, request, irb);
587 }
588
589 /*
590  * Error Recovery read opposite
591  */
592 static int
593 tape_3590_erp_read_opposite(struct tape_device *device,
594                             struct tape_request *request, struct irb *irb)
595 {
596         switch (request->op) {
597         case TO_RFO:
598                 /*
599                  * We did read forward, but the data could not be read.
600                  * We will read backward and then skip forward again.
601                  */
602                 tape_3590_read_opposite(device, request);
603                 return tape_3590_erp_retry(device, request, irb);
604         case TO_RBA:
605                 /* We tried to read forward and backward, but hat no success */
606                 return tape_3590_erp_failed(device, request, irb, -EIO);
607                 break;
608         default:
609                 PRINT_WARN("read_opposite_recovery_called_with_op: %s\n",
610                            tape_op_verbose[request->op]);
611                 return tape_3590_erp_failed(device, request, irb, -EIO);
612         }
613 }
614
615 /*
616  * Print an MIM (Media Information  Message) (message code f0)
617  */
618 static void
619 tape_3590_print_mim_msg_f0(struct tape_device *device, struct irb *irb)
620 {
621         struct tape_3590_sense *sense;
622
623         sense = (struct tape_3590_sense *) irb->ecw;
624         /* Exception Message */
625         switch (sense->fmt.f70.emc) {
626         case 0x02:
627                 PRINT_WARN("(%s): Data degraded\n", device->cdev->dev.bus_id);
628                 break;
629         case 0x03:
630                 PRINT_WARN("(%s): Data degraded in partion %i\n",
631                            device->cdev->dev.bus_id, sense->fmt.f70.mp);
632                 break;
633         case 0x04:
634                 PRINT_WARN("(%s): Medium degraded\n", device->cdev->dev.bus_id);
635                 break;
636         case 0x05:
637                 PRINT_WARN("(%s): Medium degraded in partition %i\n",
638                            device->cdev->dev.bus_id, sense->fmt.f70.mp);
639                 break;
640         case 0x06:
641                 PRINT_WARN("(%s): Block 0 Error\n", device->cdev->dev.bus_id);
642                 break;
643         case 0x07:
644                 PRINT_WARN("(%s): Medium Exception 0x%02x\n",
645                            device->cdev->dev.bus_id, sense->fmt.f70.md);
646                 break;
647         default:
648                 PRINT_WARN("(%s): MIM ExMsg: 0x%02x\n",
649                            device->cdev->dev.bus_id, sense->fmt.f70.emc);
650                 break;
651         }
652         /* Service Message */
653         switch (sense->fmt.f70.smc) {
654         case 0x02:
655                 PRINT_WARN("(%s): Reference Media maintenance procedure %i\n",
656                            device->cdev->dev.bus_id, sense->fmt.f70.md);
657                 break;
658         default:
659                 PRINT_WARN("(%s): MIM ServiceMsg: 0x%02x\n",
660                            device->cdev->dev.bus_id, sense->fmt.f70.smc);
661                 break;
662         }
663 }
664
665 /*
666  * Print an I/O Subsystem Service Information Message (message code f1)
667  */
668 static void
669 tape_3590_print_io_sim_msg_f1(struct tape_device *device, struct irb *irb)
670 {
671         struct tape_3590_sense *sense;
672
673         sense = (struct tape_3590_sense *) irb->ecw;
674         /* Exception Message */
675         switch (sense->fmt.f71.emc) {
676         case 0x01:
677                 PRINT_WARN("(%s): Effect of failure is unknown\n",
678                            device->cdev->dev.bus_id);
679                 break;
680         case 0x02:
681                 PRINT_WARN("(%s): CU Exception - no performance impact\n",
682                            device->cdev->dev.bus_id);
683                 break;
684         case 0x03:
685                 PRINT_WARN("(%s): CU Exception on channel interface 0x%02x\n",
686                            device->cdev->dev.bus_id, sense->fmt.f71.md[0]);
687                 break;
688         case 0x04:
689                 PRINT_WARN("(%s): CU Exception on device path 0x%02x\n",
690                            device->cdev->dev.bus_id, sense->fmt.f71.md[0]);
691                 break;
692         case 0x05:
693                 PRINT_WARN("(%s): CU Exception on library path 0x%02x\n",
694                            device->cdev->dev.bus_id, sense->fmt.f71.md[0]);
695                 break;
696         case 0x06:
697                 PRINT_WARN("(%s): CU Exception on node 0x%02x\n",
698                            device->cdev->dev.bus_id, sense->fmt.f71.md[0]);
699                 break;
700         case 0x07:
701                 PRINT_WARN("(%s): CU Exception on partition 0x%02x\n",
702                            device->cdev->dev.bus_id, sense->fmt.f71.md[0]);
703                 break;
704         default:
705                 PRINT_WARN("(%s): SIM ExMsg: 0x%02x\n",
706                            device->cdev->dev.bus_id, sense->fmt.f71.emc);
707         }
708         /* Service Message */
709         switch (sense->fmt.f71.smc) {
710         case 0x01:
711                 PRINT_WARN("(%s): Repair impact is unknown\n",
712                            device->cdev->dev.bus_id);
713                 break;
714         case 0x02:
715                 PRINT_WARN("(%s): Repair will not impact cu performance\n",
716                            device->cdev->dev.bus_id);
717                 break;
718         case 0x03:
719                 if (sense->fmt.f71.mdf == 0)
720                         PRINT_WARN("(%s): Repair will disable node "
721                                    "0x%x on CU\n",
722                                    device->cdev->dev.bus_id,
723                                    sense->fmt.f71.md[1]);
724                 else
725                         PRINT_WARN("(%s): Repair will disable nodes "
726                                    "(0x%x-0x%x) on CU\n",
727                                    device->cdev->dev.bus_id,
728                                    sense->fmt.f71.md[1], sense->fmt.f71.md[2]);
729                 break;
730         case 0x04:
731                 if (sense->fmt.f71.mdf == 0)
732                         PRINT_WARN("(%s): Repair will disable cannel path "
733                                    "0x%x on CU\n",
734                                    device->cdev->dev.bus_id,
735                                    sense->fmt.f71.md[1]);
736                 else
737                         PRINT_WARN("(%s): Repair will disable cannel paths "
738                                    "(0x%x-0x%x) on CU\n",
739                                    device->cdev->dev.bus_id,
740                                    sense->fmt.f71.md[1], sense->fmt.f71.md[2]);
741                 break;
742         case 0x05:
743                 if (sense->fmt.f71.mdf == 0)
744                         PRINT_WARN("(%s): Repair will disable device path "
745                                    "0x%x on CU\n",
746                                    device->cdev->dev.bus_id,
747                                    sense->fmt.f71.md[1]);
748                 else
749                         PRINT_WARN("(%s): Repair will disable device paths "
750                                    "(0x%x-0x%x) on CU\n",
751                                    device->cdev->dev.bus_id,
752                                    sense->fmt.f71.md[1], sense->fmt.f71.md[2]);
753                 break;
754         case 0x06:
755                 if (sense->fmt.f71.mdf == 0)
756                         PRINT_WARN("(%s): Repair will disable library path "
757                                    "0x%x on CU\n",
758                                    device->cdev->dev.bus_id,
759                                    sense->fmt.f71.md[1]);
760                 else
761                         PRINT_WARN("(%s): Repair will disable library paths "
762                                    "(0x%x-0x%x) on CU\n",
763                                    device->cdev->dev.bus_id,
764                                    sense->fmt.f71.md[1], sense->fmt.f71.md[2]);
765                 break;
766         case 0x07:
767                 PRINT_WARN("(%s): Repair will disable access to CU\n",
768                            device->cdev->dev.bus_id);
769                 break;
770         default:
771                 PRINT_WARN("(%s): SIM ServiceMsg: 0x%02x\n",
772                            device->cdev->dev.bus_id, sense->fmt.f71.smc);
773         }
774 }
775
776 /*
777  * Print an Device Subsystem Service Information Message (message code f2)
778  */
779 static void
780 tape_3590_print_dev_sim_msg_f2(struct tape_device *device, struct irb *irb)
781 {
782         struct tape_3590_sense *sense;
783
784         sense = (struct tape_3590_sense *) irb->ecw;
785         /* Exception Message */
786         switch (sense->fmt.f71.emc) {
787         case 0x01:
788                 PRINT_WARN("(%s): Effect of failure is unknown\n",
789                            device->cdev->dev.bus_id);
790                 break;
791         case 0x02:
792                 PRINT_WARN("(%s): DV Exception - no performance impact\n",
793                            device->cdev->dev.bus_id);
794                 break;
795         case 0x03:
796                 PRINT_WARN("(%s): DV Exception on channel interface 0x%02x\n",
797                            device->cdev->dev.bus_id, sense->fmt.f71.md[0]);
798                 break;
799         case 0x04:
800                 PRINT_WARN("(%s): DV Exception on loader 0x%02x\n",
801                            device->cdev->dev.bus_id, sense->fmt.f71.md[0]);
802                 break;
803         case 0x05:
804                 PRINT_WARN("(%s): DV Exception on message display 0x%02x\n",
805                            device->cdev->dev.bus_id, sense->fmt.f71.md[0]);
806                 break;
807         case 0x06:
808                 PRINT_WARN("(%s): DV Exception in tape path\n",
809                            device->cdev->dev.bus_id);
810                 break;
811         case 0x07:
812                 PRINT_WARN("(%s): DV Exception in drive\n",
813                            device->cdev->dev.bus_id);
814                 break;
815         default:
816                 PRINT_WARN("(%s): DSIM ExMsg: 0x%02x\n",
817                            device->cdev->dev.bus_id, sense->fmt.f71.emc);
818         }
819         /* Service Message */
820         switch (sense->fmt.f71.smc) {
821         case 0x01:
822                 PRINT_WARN("(%s): Repair impact is unknown\n",
823                            device->cdev->dev.bus_id);
824                 break;
825         case 0x02:
826                 PRINT_WARN("(%s): Repair will not impact device performance\n",
827                            device->cdev->dev.bus_id);
828                 break;
829         case 0x03:
830                 if (sense->fmt.f71.mdf == 0)
831                         PRINT_WARN("(%s): Repair will disable channel path "
832                                    "0x%x on DV\n",
833                                    device->cdev->dev.bus_id,
834                                    sense->fmt.f71.md[1]);
835                 else
836                         PRINT_WARN("(%s): Repair will disable channel path "
837                                    "(0x%x-0x%x) on DV\n",
838                                    device->cdev->dev.bus_id,
839                                    sense->fmt.f71.md[1], sense->fmt.f71.md[2]);
840                 break;
841         case 0x04:
842                 if (sense->fmt.f71.mdf == 0)
843                         PRINT_WARN("(%s): Repair will disable interface 0x%x "
844                                    "on DV\n",
845                                    device->cdev->dev.bus_id,
846                                    sense->fmt.f71.md[1]);
847                 else
848                         PRINT_WARN("(%s): Repair will disable interfaces "
849                                    "(0x%x-0x%x) on DV\n",
850                                    device->cdev->dev.bus_id,
851                                    sense->fmt.f71.md[1], sense->fmt.f71.md[2]);
852                 break;
853         case 0x05:
854                 if (sense->fmt.f71.mdf == 0)
855                         PRINT_WARN("(%s): Repair will disable loader 0x%x "
856                                    "on DV\n",
857                                    device->cdev->dev.bus_id,
858                                    sense->fmt.f71.md[1]);
859                 else
860                         PRINT_WARN("(%s): Repair will disable loader "
861                                    "(0x%x-0x%x) on DV\n",
862                                    device->cdev->dev.bus_id,
863                                    sense->fmt.f71.md[1], sense->fmt.f71.md[2]);
864                 break;
865         case 0x07:
866                 PRINT_WARN("(%s): Repair will disable access to DV\n",
867                            device->cdev->dev.bus_id);
868                 break;
869         case 0x08:
870                 if (sense->fmt.f71.mdf == 0)
871                         PRINT_WARN("(%s): Repair will disable message "
872                                    "display 0x%x on DV\n",
873                                    device->cdev->dev.bus_id,
874                                    sense->fmt.f71.md[1]);
875                 else
876                         PRINT_WARN("(%s): Repair will disable message "
877                                    "displays (0x%x-0x%x) on DV\n",
878                                    device->cdev->dev.bus_id,
879                                    sense->fmt.f71.md[1], sense->fmt.f71.md[2]);
880                 break;
881         case 0x09:
882                 PRINT_WARN("(%s): Clean DV\n", device->cdev->dev.bus_id);
883                 break;
884         default:
885                 PRINT_WARN("(%s): DSIM ServiceMsg: 0x%02x\n",
886                            device->cdev->dev.bus_id, sense->fmt.f71.smc);
887         }
888 }
889
890 /*
891  * Print standard ERA Message
892  */
893 static void
894 tape_3590_print_era_msg(struct tape_device *device, struct irb *irb)
895 {
896         struct tape_3590_sense *sense;
897
898         sense = (struct tape_3590_sense *) irb->ecw;
899         if (sense->mc == 0)
900                 return;
901         if ((sense->mc > 0) && (sense->mc < TAPE_3590_MAX_MSG)) {
902                 if (tape_3590_msg[sense->mc] != NULL)
903                         PRINT_WARN("(%s): %s\n", device->cdev->dev.bus_id,
904                                    tape_3590_msg[sense->mc]);
905                 else {
906                         PRINT_WARN("(%s): Message Code 0x%x\n",
907                                    device->cdev->dev.bus_id, sense->mc);
908                 }
909                 return;
910         }
911         if (sense->mc == 0xf0) {
912                 /* Standard Media Information Message */
913                 PRINT_WARN("(%s): MIM SEV=%i, MC=%02x, ES=%x/%x, "
914                            "RC=%02x-%04x-%02x\n", device->cdev->dev.bus_id,
915                            sense->fmt.f70.sev, sense->mc,
916                            sense->fmt.f70.emc, sense->fmt.f70.smc,
917                            sense->fmt.f70.refcode, sense->fmt.f70.mid,
918                            sense->fmt.f70.fid);
919                 tape_3590_print_mim_msg_f0(device, irb);
920                 return;
921         }
922         if (sense->mc == 0xf1) {
923                 /* Standard I/O Subsystem Service Information Message */
924                 PRINT_WARN("(%s): IOSIM SEV=%i, DEVTYPE=3590/%02x, "
925                            "MC=%02x, ES=%x/%x, REF=0x%04x-0x%04x-0x%04x\n",
926                            device->cdev->dev.bus_id, sense->fmt.f71.sev,
927                            device->cdev->id.dev_model,
928                            sense->mc, sense->fmt.f71.emc,
929                            sense->fmt.f71.smc, sense->fmt.f71.refcode1,
930                            sense->fmt.f71.refcode2, sense->fmt.f71.refcode3);
931                 tape_3590_print_io_sim_msg_f1(device, irb);
932                 return;
933         }
934         if (sense->mc == 0xf2) {
935                 /* Standard Device Service Information Message */
936                 PRINT_WARN("(%s): DEVSIM SEV=%i, DEVTYPE=3590/%02x, "
937                            "MC=%02x, ES=%x/%x, REF=0x%04x-0x%04x-0x%04x\n",
938                            device->cdev->dev.bus_id, sense->fmt.f71.sev,
939                            device->cdev->id.dev_model,
940                            sense->mc, sense->fmt.f71.emc,
941                            sense->fmt.f71.smc, sense->fmt.f71.refcode1,
942                            sense->fmt.f71.refcode2, sense->fmt.f71.refcode3);
943                 tape_3590_print_dev_sim_msg_f2(device, irb);
944                 return;
945         }
946         if (sense->mc == 0xf3) {
947                 /* Standard Library Service Information Message */
948                 return;
949         }
950         PRINT_WARN("(%s): Device Message(%x)\n",
951                    device->cdev->dev.bus_id, sense->mc);
952 }
953
954 /*
955  *  3590 error Recovery routine:
956  *  If possible, it tries to recover from the error. If this is not possible,
957  *  inform the user about the problem.
958  */
959 static int
960 tape_3590_unit_check(struct tape_device *device, struct tape_request *request,
961                      struct irb *irb)
962 {
963         struct tape_3590_sense *sense;
964         int rc;
965
966 #ifdef CONFIG_S390_TAPE_BLOCK
967         if (request->op == TO_BLOCK) {
968                 /*
969                  * Recovery for block device requests. Set the block_position
970                  * to something invalid and retry.
971                  */
972                 device->blk_data.block_position = -1;
973                 if (request->retries-- <= 0)
974                         return tape_3590_erp_failed(device, request, irb, -EIO);
975                 else
976                         return tape_3590_erp_retry(device, request, irb);
977         }
978 #endif
979
980         sense = (struct tape_3590_sense *) irb->ecw;
981
982         /*
983          * First check all RC-QRCs where we want to do something special
984          *   - "break":     basic error recovery is done
985          *   - "goto out:": just print error message if available
986          */
987         rc = -EIO;
988         switch (sense->rc_rqc) {
989
990         case 0x1110:
991                 tape_3590_print_era_msg(device, irb);
992                 return tape_3590_erp_read_buf_log(device, request, irb);
993
994         case 0x2011:
995                 tape_3590_print_era_msg(device, irb);
996                 return tape_3590_erp_read_alternate(device, request, irb);
997
998         case 0x2230:
999         case 0x2231:
1000                 tape_3590_print_era_msg(device, irb);
1001                 return tape_3590_erp_special_interrupt(device, request, irb);
1002
1003         case 0x3010:
1004                 DBF_EVENT(2, "(%08x): Backward at Beginning of Partition\n",
1005                           device->cdev_id);
1006                 return tape_3590_erp_basic(device, request, irb, -ENOSPC);
1007         case 0x3012:
1008                 DBF_EVENT(2, "(%08x): Forward at End of Partition\n",
1009                           device->cdev_id);
1010                 return tape_3590_erp_basic(device, request, irb, -ENOSPC);
1011         case 0x3020:
1012                 DBF_EVENT(2, "(%08x): End of Data Mark\n", device->cdev_id);
1013                 return tape_3590_erp_basic(device, request, irb, -ENOSPC);
1014
1015         case 0x3122:
1016                 DBF_EVENT(2, "(%08x): Rewind Unload initiated\n",
1017                           device->cdev_id);
1018                 return tape_3590_erp_basic(device, request, irb, -EIO);
1019         case 0x3123:
1020                 DBF_EVENT(2, "(%08x): Rewind Unload complete\n",
1021                           device->cdev_id);
1022                 tape_med_state_set(device, MS_UNLOADED);
1023                 return tape_3590_erp_basic(device, request, irb, 0);
1024
1025         case 0x4010:
1026                 /*
1027                  * print additional msg since default msg
1028                  * "device intervention" is not very meaningfull
1029                  */
1030                 PRINT_WARN("(%s): Tape operation when medium not loaded\n",
1031                            device->cdev->dev.bus_id);
1032                 tape_med_state_set(device, MS_UNLOADED);
1033                 return tape_3590_erp_basic(device, request, irb, -ENOMEDIUM);
1034         case 0x4012:            /* Device Long Busy */
1035                 tape_3590_print_era_msg(device, irb);
1036                 return tape_3590_erp_long_busy(device, request, irb);
1037
1038         case 0x5010:
1039                 if (sense->rac == 0xd0) {
1040                         /* Swap */
1041                         tape_3590_print_era_msg(device, irb);
1042                         return tape_3590_erp_swap(device, request, irb);
1043                 }
1044                 if (sense->rac == 0x26) {
1045                         /* Read Opposite */
1046                         tape_3590_print_era_msg(device, irb);
1047                         return tape_3590_erp_read_opposite(device, request,
1048                                                            irb);
1049                 }
1050                 return tape_3590_erp_basic(device, request, irb, -EIO);
1051         case 0x5020:
1052         case 0x5021:
1053         case 0x5022:
1054         case 0x5040:
1055         case 0x5041:
1056         case 0x5042:
1057                 tape_3590_print_era_msg(device, irb);
1058                 return tape_3590_erp_swap(device, request, irb);
1059
1060         case 0x5110:
1061         case 0x5111:
1062                 return tape_3590_erp_basic(device, request, irb, -EMEDIUMTYPE);
1063
1064         case 0x5120:
1065         case 0x1120:
1066                 tape_med_state_set(device, MS_UNLOADED);
1067                 return tape_3590_erp_basic(device, request, irb, -ENOMEDIUM);
1068
1069         case 0x6020:
1070                 PRINT_WARN("(%s): Cartridge of wrong type ?\n",
1071                            device->cdev->dev.bus_id);
1072                 return tape_3590_erp_basic(device, request, irb, -EMEDIUMTYPE);
1073
1074         case 0x8011:
1075                 PRINT_WARN("(%s): Another host has reserved the tape device\n",
1076                            device->cdev->dev.bus_id);
1077                 return tape_3590_erp_basic(device, request, irb, -EPERM);
1078         case 0x8013:
1079                 PRINT_WARN("(%s): Another host has priviliged access to the "
1080                            "tape device\n", device->cdev->dev.bus_id);
1081                 PRINT_WARN("(%s): To solve the problem unload the current "
1082                            "cartridge!\n", device->cdev->dev.bus_id);
1083                 return tape_3590_erp_basic(device, request, irb, -EPERM);
1084         default:
1085                 return tape_3590_erp_basic(device, request, irb, -EIO);
1086         }
1087 }
1088
1089 /*
1090  * 3590 interrupt handler:
1091  */
1092 static int
1093 tape_3590_irq(struct tape_device *device, struct tape_request *request,
1094               struct irb *irb)
1095 {
1096         if (request == NULL)
1097                 return tape_3590_unsolicited_irq(device, irb);
1098
1099         if ((irb->scsw.dstat & DEV_STAT_UNIT_EXCEP) &&
1100             (irb->scsw.dstat & DEV_STAT_DEV_END) && (request->op == TO_WRI)) {
1101                 /* Write at end of volume */
1102                 DBF_EVENT(2, "End of volume\n");
1103                 return tape_3590_erp_failed(device, request, irb, -ENOSPC);
1104         }
1105
1106         if (irb->scsw.dstat & DEV_STAT_UNIT_CHECK)
1107                 return tape_3590_unit_check(device, request, irb);
1108
1109         if (irb->scsw.dstat & DEV_STAT_DEV_END) {
1110                 if (irb->scsw.dstat == DEV_STAT_UNIT_EXCEP) {
1111                         if (request->op == TO_FSB || request->op == TO_BSB)
1112                                 request->rescnt++;
1113                         else
1114                                 DBF_EVENT(5, "Unit Exception!\n");
1115                 }
1116
1117                 return tape_3590_done(device, request);
1118         }
1119
1120         if (irb->scsw.dstat & DEV_STAT_CHN_END) {
1121                 DBF_EVENT(2, "cannel end\n");
1122                 return TAPE_IO_PENDING;
1123         }
1124
1125         if (irb->scsw.dstat & DEV_STAT_ATTENTION) {
1126                 DBF_EVENT(2, "Unit Attention when busy..\n");
1127                 return TAPE_IO_PENDING;
1128         }
1129
1130         DBF_EVENT(6, "xunknownirq\n");
1131         PRINT_ERR("Unexpected interrupt.\n");
1132         PRINT_ERR("Current op is: %s", tape_op_verbose[request->op]);
1133         tape_dump_sense(device, request, irb);
1134         return TAPE_IO_STOP;
1135 }
1136
1137 /*
1138  * Setup device function
1139  */
1140 static int
1141 tape_3590_setup_device(struct tape_device *device)
1142 {
1143         int rc;
1144         struct tape_3590_disc_data *data;
1145
1146         DBF_EVENT(6, "3590 device setup\n");
1147         data = kmalloc(sizeof(struct tape_3590_disc_data),
1148                        GFP_KERNEL | GFP_DMA);
1149         if (data == NULL)
1150                 return -ENOMEM;
1151         data->read_back_op = READ_PREVIOUS;
1152         device->discdata = data;
1153
1154         if ((rc = tape_std_assign(device)) == 0) {
1155                 /* Try to find out if medium is loaded */
1156                 if ((rc = tape_3590_sense_medium(device)) != 0)
1157                         DBF_LH(3, "3590 medium sense returned %d\n", rc);
1158         }
1159
1160         return rc;
1161 }
1162
1163 /*
1164  * Cleanup device function
1165  */
1166 static void
1167 tape_3590_cleanup_device(struct tape_device *device)
1168 {
1169         flush_scheduled_work();
1170         tape_std_unassign(device);
1171
1172         kfree(device->discdata);
1173         device->discdata = NULL;
1174 }
1175
1176 /*
1177  * List of 3590 magnetic tape commands.
1178  */
1179 static tape_mtop_fn tape_3590_mtop[TAPE_NR_MTOPS] = {
1180         [MTRESET]        = tape_std_mtreset,
1181         [MTFSF]          = tape_std_mtfsf,
1182         [MTBSF]          = tape_std_mtbsf,
1183         [MTFSR]          = tape_std_mtfsr,
1184         [MTBSR]          = tape_std_mtbsr,
1185         [MTWEOF]         = tape_std_mtweof,
1186         [MTREW]          = tape_std_mtrew,
1187         [MTOFFL]         = tape_std_mtoffl,
1188         [MTNOP]          = tape_std_mtnop,
1189         [MTRETEN]        = tape_std_mtreten,
1190         [MTBSFM]         = tape_std_mtbsfm,
1191         [MTFSFM]         = tape_std_mtfsfm,
1192         [MTEOM]          = tape_std_mteom,
1193         [MTERASE]        = tape_std_mterase,
1194         [MTRAS1]         = NULL,
1195         [MTRAS2]         = NULL,
1196         [MTRAS3]         = NULL,
1197         [MTSETBLK]       = tape_std_mtsetblk,
1198         [MTSETDENSITY]   = NULL,
1199         [MTSEEK]         = tape_3590_mtseek,
1200         [MTTELL]         = tape_3590_mttell,
1201         [MTSETDRVBUFFER] = NULL,
1202         [MTFSS]          = NULL,
1203         [MTBSS]          = NULL,
1204         [MTWSM]          = NULL,
1205         [MTLOCK]         = NULL,
1206         [MTUNLOCK]       = NULL,
1207         [MTLOAD]         = tape_std_mtload,
1208         [MTUNLOAD]       = tape_std_mtunload,
1209         [MTCOMPRESSION]  = tape_std_mtcompression,
1210         [MTSETPART]      = NULL,
1211         [MTMKPART]       = NULL
1212 };
1213
1214 /*
1215  * Tape discipline structure for 3590.
1216  */
1217 static struct tape_discipline tape_discipline_3590 = {
1218         .owner = THIS_MODULE,
1219         .setup_device = tape_3590_setup_device,
1220         .cleanup_device = tape_3590_cleanup_device,
1221         .process_eov = tape_std_process_eov,
1222         .irq = tape_3590_irq,
1223         .read_block = tape_std_read_block,
1224         .write_block = tape_std_write_block,
1225 #ifdef CONFIG_S390_TAPE_BLOCK
1226         .bread = tape_3590_bread,
1227         .free_bread = tape_3590_free_bread,
1228         .check_locate = tape_3590_check_locate,
1229 #endif
1230         .ioctl_fn = tape_3590_ioctl,
1231         .mtop_array = tape_3590_mtop
1232 };
1233
1234 static struct ccw_device_id tape_3590_ids[] = {
1235         {CCW_DEVICE_DEVTYPE(0x3590, 0, 0x3590, 0), .driver_info = tape_3590},
1236         {CCW_DEVICE_DEVTYPE(0x3592, 0, 0x3592, 0), .driver_info = tape_3592},
1237         { /* end of list */ }
1238 };
1239
1240 static int
1241 tape_3590_online(struct ccw_device *cdev)
1242 {
1243         return tape_generic_online(cdev->dev.driver_data,
1244                                    &tape_discipline_3590);
1245 }
1246
1247 static int
1248 tape_3590_offline(struct ccw_device *cdev)
1249 {
1250         return tape_generic_offline(cdev->dev.driver_data);
1251 }
1252
1253 static struct ccw_driver tape_3590_driver = {
1254         .name = "tape_3590",
1255         .owner = THIS_MODULE,
1256         .ids = tape_3590_ids,
1257         .probe = tape_generic_probe,
1258         .remove = tape_generic_remove,
1259         .set_offline = tape_3590_offline,
1260         .set_online = tape_3590_online,
1261 };
1262
1263 /*
1264  * Setup discipline structure.
1265  */
1266 static int
1267 tape_3590_init(void)
1268 {
1269         int rc;
1270
1271         TAPE_DBF_AREA = debug_register("tape_3590", 2, 2, 4 * sizeof(long));
1272         debug_register_view(TAPE_DBF_AREA, &debug_sprintf_view);
1273 #ifdef DBF_LIKE_HELL
1274         debug_set_level(TAPE_DBF_AREA, 6);
1275 #endif
1276
1277         DBF_EVENT(3, "3590 init\n");
1278         /* Register driver for 3590 tapes. */
1279         rc = ccw_driver_register(&tape_3590_driver);
1280         if (rc)
1281                 DBF_EVENT(3, "3590 init failed\n");
1282         else
1283                 DBF_EVENT(3, "3590 registered\n");
1284         return rc;
1285 }
1286
1287 static void
1288 tape_3590_exit(void)
1289 {
1290         ccw_driver_unregister(&tape_3590_driver);
1291
1292         debug_unregister(TAPE_DBF_AREA);
1293 }
1294
1295 MODULE_DEVICE_TABLE(ccw, tape_3590_ids);
1296 MODULE_AUTHOR("(C) 2001,2006 IBM Corporation");
1297 MODULE_DESCRIPTION("Linux on zSeries channel attached 3590 tape device driver");
1298 MODULE_LICENSE("GPL");
1299
1300 module_init(tape_3590_init);
1301 module_exit(tape_3590_exit);