Version:  2.0.40 2.2.26 2.4.37 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16 3.17 3.18 3.19 4.0 4.1 4.2 4.3 4.4 4.5 4.6

Linux/drivers/s390/block/dasd_fba.c

  1 /*
  2  * Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com>
  3  * Bugreports.to..: <Linux390@de.ibm.com>
  4  * Copyright IBM Corp. 1999, 2009
  5  */
  6 
  7 #define KMSG_COMPONENT "dasd-fba"
  8 
  9 #include <linux/stddef.h>
 10 #include <linux/kernel.h>
 11 #include <asm/debug.h>
 12 
 13 #include <linux/slab.h>
 14 #include <linux/hdreg.h>        /* HDIO_GETGEO                      */
 15 #include <linux/bio.h>
 16 #include <linux/module.h>
 17 #include <linux/init.h>
 18 
 19 #include <asm/idals.h>
 20 #include <asm/ebcdic.h>
 21 #include <asm/io.h>
 22 #include <asm/ccwdev.h>
 23 
 24 #include "dasd_int.h"
 25 #include "dasd_fba.h"
 26 
 27 #ifdef PRINTK_HEADER
 28 #undef PRINTK_HEADER
 29 #endif                          /* PRINTK_HEADER */
 30 #define PRINTK_HEADER "dasd(fba):"
 31 
 32 #define FBA_DEFAULT_RETRIES 32
 33 
 34 #define DASD_FBA_CCW_WRITE 0x41
 35 #define DASD_FBA_CCW_READ 0x42
 36 #define DASD_FBA_CCW_LOCATE 0x43
 37 #define DASD_FBA_CCW_DEFINE_EXTENT 0x63
 38 
 39 MODULE_LICENSE("GPL");
 40 
 41 static struct dasd_discipline dasd_fba_discipline;
 42 
 43 struct dasd_fba_private {
 44         struct dasd_fba_characteristics rdc_data;
 45 };
 46 
 47 static struct ccw_device_id dasd_fba_ids[] = {
 48         { CCW_DEVICE_DEVTYPE (0x6310, 0, 0x9336, 0), .driver_info = 0x1},
 49         { CCW_DEVICE_DEVTYPE (0x3880, 0, 0x3370, 0), .driver_info = 0x2},
 50         { /* end of list */ },
 51 };
 52 
 53 MODULE_DEVICE_TABLE(ccw, dasd_fba_ids);
 54 
 55 static struct ccw_driver dasd_fba_driver; /* see below */
 56 static int
 57 dasd_fba_probe(struct ccw_device *cdev)
 58 {
 59         return dasd_generic_probe(cdev, &dasd_fba_discipline);
 60 }
 61 
 62 static int
 63 dasd_fba_set_online(struct ccw_device *cdev)
 64 {
 65         return dasd_generic_set_online(cdev, &dasd_fba_discipline);
 66 }
 67 
 68 static struct ccw_driver dasd_fba_driver = {
 69         .driver = {
 70                 .name   = "dasd-fba",
 71                 .owner  = THIS_MODULE,
 72         },
 73         .ids         = dasd_fba_ids,
 74         .probe       = dasd_fba_probe,
 75         .remove      = dasd_generic_remove,
 76         .set_offline = dasd_generic_set_offline,
 77         .set_online  = dasd_fba_set_online,
 78         .notify      = dasd_generic_notify,
 79         .path_event  = dasd_generic_path_event,
 80         .freeze      = dasd_generic_pm_freeze,
 81         .thaw        = dasd_generic_restore_device,
 82         .restore     = dasd_generic_restore_device,
 83         .int_class   = IRQIO_DAS,
 84 };
 85 
 86 static void
 87 define_extent(struct ccw1 * ccw, struct DE_fba_data *data, int rw,
 88               int blksize, int beg, int nr)
 89 {
 90         ccw->cmd_code = DASD_FBA_CCW_DEFINE_EXTENT;
 91         ccw->flags = 0;
 92         ccw->count = 16;
 93         ccw->cda = (__u32) __pa(data);
 94         memset(data, 0, sizeof (struct DE_fba_data));
 95         if (rw == WRITE)
 96                 (data->mask).perm = 0x0;
 97         else if (rw == READ)
 98                 (data->mask).perm = 0x1;
 99         else
100                 data->mask.perm = 0x2;
101         data->blk_size = blksize;
102         data->ext_loc = beg;
103         data->ext_end = nr - 1;
104 }
105 
106 static void
107 locate_record(struct ccw1 * ccw, struct LO_fba_data *data, int rw,
108               int block_nr, int block_ct)
109 {
110         ccw->cmd_code = DASD_FBA_CCW_LOCATE;
111         ccw->flags = 0;
112         ccw->count = 8;
113         ccw->cda = (__u32) __pa(data);
114         memset(data, 0, sizeof (struct LO_fba_data));
115         if (rw == WRITE)
116                 data->operation.cmd = 0x5;
117         else if (rw == READ)
118                 data->operation.cmd = 0x6;
119         else
120                 data->operation.cmd = 0x8;
121         data->blk_nr = block_nr;
122         data->blk_ct = block_ct;
123 }
124 
125 static int
126 dasd_fba_check_characteristics(struct dasd_device *device)
127 {
128         struct dasd_fba_private *private = device->private;
129         struct ccw_device *cdev = device->cdev;
130         struct dasd_block *block;
131         int readonly, rc;
132 
133         if (!private) {
134                 private = kzalloc(sizeof(*private), GFP_KERNEL | GFP_DMA);
135                 if (!private) {
136                         dev_warn(&device->cdev->dev,
137                                  "Allocating memory for private DASD "
138                                  "data failed\n");
139                         return -ENOMEM;
140                 }
141                 device->private = private;
142         } else {
143                 memset(private, 0, sizeof(*private));
144         }
145         block = dasd_alloc_block();
146         if (IS_ERR(block)) {
147                 DBF_EVENT_DEVID(DBF_WARNING, cdev, "%s", "could not allocate "
148                                 "dasd block structure");
149                 device->private = NULL;
150                 kfree(private);
151                 return PTR_ERR(block);
152         }
153         device->block = block;
154         block->base = device;
155 
156         /* Read Device Characteristics */
157         rc = dasd_generic_read_dev_chars(device, DASD_FBA_MAGIC,
158                                          &private->rdc_data, 32);
159         if (rc) {
160                 DBF_EVENT_DEVID(DBF_WARNING, cdev, "Read device "
161                                 "characteristics returned error %d", rc);
162                 device->block = NULL;
163                 dasd_free_block(block);
164                 device->private = NULL;
165                 kfree(private);
166                 return rc;
167         }
168 
169         device->default_expires = DASD_EXPIRES;
170         device->default_retries = FBA_DEFAULT_RETRIES;
171         device->path_data.opm = LPM_ANYPATH;
172 
173         readonly = dasd_device_is_ro(device);
174         if (readonly)
175                 set_bit(DASD_FLAG_DEVICE_RO, &device->flags);
176 
177         dev_info(&device->cdev->dev,
178                  "New FBA DASD %04X/%02X (CU %04X/%02X) with %d MB "
179                  "and %d B/blk%s\n",
180                  cdev->id.dev_type,
181                  cdev->id.dev_model,
182                  cdev->id.cu_type,
183                  cdev->id.cu_model,
184                  ((private->rdc_data.blk_bdsa *
185                    (private->rdc_data.blk_size >> 9)) >> 11),
186                  private->rdc_data.blk_size,
187                  readonly ? ", read-only device" : "");
188         return 0;
189 }
190 
191 static int dasd_fba_do_analysis(struct dasd_block *block)
192 {
193         struct dasd_fba_private *private = block->base->private;
194         int sb, rc;
195 
196         rc = dasd_check_blocksize(private->rdc_data.blk_size);
197         if (rc) {
198                 DBF_DEV_EVENT(DBF_WARNING, block->base, "unknown blocksize %d",
199                             private->rdc_data.blk_size);
200                 return rc;
201         }
202         block->blocks = private->rdc_data.blk_bdsa;
203         block->bp_block = private->rdc_data.blk_size;
204         block->s2b_shift = 0;   /* bits to shift 512 to get a block */
205         for (sb = 512; sb < private->rdc_data.blk_size; sb = sb << 1)
206                 block->s2b_shift++;
207         return 0;
208 }
209 
210 static int dasd_fba_fill_geometry(struct dasd_block *block,
211                                   struct hd_geometry *geo)
212 {
213         if (dasd_check_blocksize(block->bp_block) != 0)
214                 return -EINVAL;
215         geo->cylinders = (block->blocks << block->s2b_shift) >> 10;
216         geo->heads = 16;
217         geo->sectors = 128 >> block->s2b_shift;
218         return 0;
219 }
220 
221 static dasd_erp_fn_t
222 dasd_fba_erp_action(struct dasd_ccw_req * cqr)
223 {
224         return dasd_default_erp_action;
225 }
226 
227 static dasd_erp_fn_t
228 dasd_fba_erp_postaction(struct dasd_ccw_req * cqr)
229 {
230         if (cqr->function == dasd_default_erp_action)
231                 return dasd_default_erp_postaction;
232 
233         DBF_DEV_EVENT(DBF_WARNING, cqr->startdev, "unknown ERP action %p",
234                     cqr->function);
235         return NULL;
236 }
237 
238 static void dasd_fba_check_for_device_change(struct dasd_device *device,
239                                              struct dasd_ccw_req *cqr,
240                                              struct irb *irb)
241 {
242         char mask;
243 
244         /* first of all check for state change pending interrupt */
245         mask = DEV_STAT_ATTENTION | DEV_STAT_DEV_END | DEV_STAT_UNIT_EXCEP;
246         if ((irb->scsw.cmd.dstat & mask) == mask)
247                 dasd_generic_handle_state_change(device);
248 };
249 
250 static struct dasd_ccw_req *dasd_fba_build_cp(struct dasd_device * memdev,
251                                               struct dasd_block *block,
252                                               struct request *req)
253 {
254         struct dasd_fba_private *private = block->base->private;
255         unsigned long *idaws;
256         struct LO_fba_data *LO_data;
257         struct dasd_ccw_req *cqr;
258         struct ccw1 *ccw;
259         struct req_iterator iter;
260         struct bio_vec bv;
261         char *dst;
262         int count, cidaw, cplength, datasize;
263         sector_t recid, first_rec, last_rec;
264         unsigned int blksize, off;
265         unsigned char cmd;
266 
267         if (rq_data_dir(req) == READ) {
268                 cmd = DASD_FBA_CCW_READ;
269         } else if (rq_data_dir(req) == WRITE) {
270                 cmd = DASD_FBA_CCW_WRITE;
271         } else
272                 return ERR_PTR(-EINVAL);
273         blksize = block->bp_block;
274         /* Calculate record id of first and last block. */
275         first_rec = blk_rq_pos(req) >> block->s2b_shift;
276         last_rec =
277                 (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift;
278         /* Check struct bio and count the number of blocks for the request. */
279         count = 0;
280         cidaw = 0;
281         rq_for_each_segment(bv, req, iter) {
282                 if (bv.bv_len & (blksize - 1))
283                         /* Fba can only do full blocks. */
284                         return ERR_PTR(-EINVAL);
285                 count += bv.bv_len >> (block->s2b_shift + 9);
286                 if (idal_is_needed (page_address(bv.bv_page), bv.bv_len))
287                         cidaw += bv.bv_len / blksize;
288         }
289         /* Paranoia. */
290         if (count != last_rec - first_rec + 1)
291                 return ERR_PTR(-EINVAL);
292         /* 1x define extent + 1x locate record + number of blocks */
293         cplength = 2 + count;
294         /* 1x define extent + 1x locate record */
295         datasize = sizeof(struct DE_fba_data) + sizeof(struct LO_fba_data) +
296                 cidaw * sizeof(unsigned long);
297         /*
298          * Find out number of additional locate record ccws if the device
299          * can't do data chaining.
300          */
301         if (private->rdc_data.mode.bits.data_chain == 0) {
302                 cplength += count - 1;
303                 datasize += (count - 1)*sizeof(struct LO_fba_data);
304         }
305         /* Allocate the ccw request. */
306         cqr = dasd_smalloc_request(DASD_FBA_MAGIC, cplength, datasize, memdev);
307         if (IS_ERR(cqr))
308                 return cqr;
309         ccw = cqr->cpaddr;
310         /* First ccw is define extent. */
311         define_extent(ccw++, cqr->data, rq_data_dir(req),
312                       block->bp_block, blk_rq_pos(req), blk_rq_sectors(req));
313         /* Build locate_record + read/write ccws. */
314         idaws = (unsigned long *) (cqr->data + sizeof(struct DE_fba_data));
315         LO_data = (struct LO_fba_data *) (idaws + cidaw);
316         /* Locate record for all blocks for smart devices. */
317         if (private->rdc_data.mode.bits.data_chain != 0) {
318                 ccw[-1].flags |= CCW_FLAG_CC;
319                 locate_record(ccw++, LO_data++, rq_data_dir(req), 0, count);
320         }
321         recid = first_rec;
322         rq_for_each_segment(bv, req, iter) {
323                 dst = page_address(bv.bv_page) + bv.bv_offset;
324                 if (dasd_page_cache) {
325                         char *copy = kmem_cache_alloc(dasd_page_cache,
326                                                       GFP_DMA | __GFP_NOWARN);
327                         if (copy && rq_data_dir(req) == WRITE)
328                                 memcpy(copy + bv.bv_offset, dst, bv.bv_len);
329                         if (copy)
330                                 dst = copy + bv.bv_offset;
331                 }
332                 for (off = 0; off < bv.bv_len; off += blksize) {
333                         /* Locate record for stupid devices. */
334                         if (private->rdc_data.mode.bits.data_chain == 0) {
335                                 ccw[-1].flags |= CCW_FLAG_CC;
336                                 locate_record(ccw, LO_data++,
337                                               rq_data_dir(req),
338                                               recid - first_rec, 1);
339                                 ccw->flags = CCW_FLAG_CC;
340                                 ccw++;
341                         } else {
342                                 if (recid > first_rec)
343                                         ccw[-1].flags |= CCW_FLAG_DC;
344                                 else
345                                         ccw[-1].flags |= CCW_FLAG_CC;
346                         }
347                         ccw->cmd_code = cmd;
348                         ccw->count = block->bp_block;
349                         if (idal_is_needed(dst, blksize)) {
350                                 ccw->cda = (__u32)(addr_t) idaws;
351                                 ccw->flags = CCW_FLAG_IDA;
352                                 idaws = idal_create_words(idaws, dst, blksize);
353                         } else {
354                                 ccw->cda = (__u32)(addr_t) dst;
355                                 ccw->flags = 0;
356                         }
357                         ccw++;
358                         dst += blksize;
359                         recid++;
360                 }
361         }
362         if (blk_noretry_request(req) ||
363             block->base->features & DASD_FEATURE_FAILFAST)
364                 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
365         cqr->startdev = memdev;
366         cqr->memdev = memdev;
367         cqr->block = block;
368         cqr->expires = memdev->default_expires * HZ;    /* default 5 minutes */
369         cqr->retries = memdev->default_retries;
370         cqr->buildclk = get_tod_clock();
371         cqr->status = DASD_CQR_FILLED;
372         return cqr;
373 }
374 
375 static int
376 dasd_fba_free_cp(struct dasd_ccw_req *cqr, struct request *req)
377 {
378         struct dasd_fba_private *private = cqr->block->base->private;
379         struct ccw1 *ccw;
380         struct req_iterator iter;
381         struct bio_vec bv;
382         char *dst, *cda;
383         unsigned int blksize, off;
384         int status;
385 
386         if (!dasd_page_cache)
387                 goto out;
388         blksize = cqr->block->bp_block;
389         ccw = cqr->cpaddr;
390         /* Skip over define extent & locate record. */
391         ccw++;
392         if (private->rdc_data.mode.bits.data_chain != 0)
393                 ccw++;
394         rq_for_each_segment(bv, req, iter) {
395                 dst = page_address(bv.bv_page) + bv.bv_offset;
396                 for (off = 0; off < bv.bv_len; off += blksize) {
397                         /* Skip locate record. */
398                         if (private->rdc_data.mode.bits.data_chain == 0)
399                                 ccw++;
400                         if (dst) {
401                                 if (ccw->flags & CCW_FLAG_IDA)
402                                         cda = *((char **)((addr_t) ccw->cda));
403                                 else
404                                         cda = (char *)((addr_t) ccw->cda);
405                                 if (dst != cda) {
406                                         if (rq_data_dir(req) == READ)
407                                                 memcpy(dst, cda, bv.bv_len);
408                                         kmem_cache_free(dasd_page_cache,
409                                             (void *)((addr_t)cda & PAGE_MASK));
410                                 }
411                                 dst = NULL;
412                         }
413                         ccw++;
414                 }
415         }
416 out:
417         status = cqr->status == DASD_CQR_DONE;
418         dasd_sfree_request(cqr, cqr->memdev);
419         return status;
420 }
421 
422 static void dasd_fba_handle_terminated_request(struct dasd_ccw_req *cqr)
423 {
424         if (cqr->retries < 0)
425                 cqr->status = DASD_CQR_FAILED;
426         else
427                 cqr->status = DASD_CQR_FILLED;
428 };
429 
430 static int
431 dasd_fba_fill_info(struct dasd_device * device,
432                    struct dasd_information2_t * info)
433 {
434         struct dasd_fba_private *private = device->private;
435 
436         info->label_block = 1;
437         info->FBA_layout = 1;
438         info->format = DASD_FORMAT_LDL;
439         info->characteristics_size = sizeof(private->rdc_data);
440         memcpy(info->characteristics, &private->rdc_data,
441                sizeof(private->rdc_data));
442         info->confdata_size = 0;
443         return 0;
444 }
445 
446 static void
447 dasd_fba_dump_sense_dbf(struct dasd_device *device, struct irb *irb,
448                         char *reason)
449 {
450         u64 *sense;
451 
452         sense = (u64 *) dasd_get_sense(irb);
453         if (sense) {
454                 DBF_DEV_EVENT(DBF_EMERG, device,
455                               "%s: %s %02x%02x%02x %016llx %016llx %016llx "
456                               "%016llx", reason,
457                               scsw_is_tm(&irb->scsw) ? "t" : "c",
458                               scsw_cc(&irb->scsw), scsw_cstat(&irb->scsw),
459                               scsw_dstat(&irb->scsw), sense[0], sense[1],
460                               sense[2], sense[3]);
461         } else {
462                 DBF_DEV_EVENT(DBF_EMERG, device, "%s",
463                               "SORRY - NO VALID SENSE AVAILABLE\n");
464         }
465 }
466 
467 
468 static void
469 dasd_fba_dump_sense(struct dasd_device *device, struct dasd_ccw_req * req,
470                     struct irb *irb)
471 {
472         char *page;
473         struct ccw1 *act, *end, *last;
474         int len, sl, sct, count;
475 
476         page = (char *) get_zeroed_page(GFP_ATOMIC);
477         if (page == NULL) {
478                 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
479                             "No memory to dump sense data");
480                 return;
481         }
482         len = sprintf(page, PRINTK_HEADER
483                       " I/O status report for device %s:\n",
484                       dev_name(&device->cdev->dev));
485         len += sprintf(page + len, PRINTK_HEADER
486                        " in req: %p CS: 0x%02X DS: 0x%02X\n", req,
487                        irb->scsw.cmd.cstat, irb->scsw.cmd.dstat);
488         len += sprintf(page + len, PRINTK_HEADER
489                        " device %s: Failing CCW: %p\n",
490                        dev_name(&device->cdev->dev),
491                        (void *) (addr_t) irb->scsw.cmd.cpa);
492         if (irb->esw.esw0.erw.cons) {
493                 for (sl = 0; sl < 4; sl++) {
494                         len += sprintf(page + len, PRINTK_HEADER
495                                        " Sense(hex) %2d-%2d:",
496                                        (8 * sl), ((8 * sl) + 7));
497 
498                         for (sct = 0; sct < 8; sct++) {
499                                 len += sprintf(page + len, " %02x",
500                                                irb->ecw[8 * sl + sct]);
501                         }
502                         len += sprintf(page + len, "\n");
503                 }
504         } else {
505                 len += sprintf(page + len, PRINTK_HEADER
506                                " SORRY - NO VALID SENSE AVAILABLE\n");
507         }
508         printk(KERN_ERR "%s", page);
509 
510         /* dump the Channel Program */
511         /* print first CCWs (maximum 8) */
512         act = req->cpaddr;
513         for (last = act; last->flags & (CCW_FLAG_CC | CCW_FLAG_DC); last++);
514         end = min(act + 8, last);
515         len = sprintf(page, PRINTK_HEADER " Related CP in req: %p\n", req);
516         while (act <= end) {
517                 len += sprintf(page + len, PRINTK_HEADER
518                                " CCW %p: %08X %08X DAT:",
519                                act, ((int *) act)[0], ((int *) act)[1]);
520                 for (count = 0; count < 32 && count < act->count;
521                      count += sizeof(int))
522                         len += sprintf(page + len, " %08X",
523                                        ((int *) (addr_t) act->cda)
524                                        [(count>>2)]);
525                 len += sprintf(page + len, "\n");
526                 act++;
527         }
528         printk(KERN_ERR "%s", page);
529 
530 
531         /* print failing CCW area */
532         len = 0;
533         if (act <  ((struct ccw1 *)(addr_t) irb->scsw.cmd.cpa) - 2) {
534                 act = ((struct ccw1 *)(addr_t) irb->scsw.cmd.cpa) - 2;
535                 len += sprintf(page + len, PRINTK_HEADER "......\n");
536         }
537         end = min((struct ccw1 *)(addr_t) irb->scsw.cmd.cpa + 2, last);
538         while (act <= end) {
539                 len += sprintf(page + len, PRINTK_HEADER
540                                " CCW %p: %08X %08X DAT:",
541                                act, ((int *) act)[0], ((int *) act)[1]);
542                 for (count = 0; count < 32 && count < act->count;
543                      count += sizeof(int))
544                         len += sprintf(page + len, " %08X",
545                                        ((int *) (addr_t) act->cda)
546                                        [(count>>2)]);
547                 len += sprintf(page + len, "\n");
548                 act++;
549         }
550 
551         /* print last CCWs */
552         if (act <  last - 2) {
553                 act = last - 2;
554                 len += sprintf(page + len, PRINTK_HEADER "......\n");
555         }
556         while (act <= last) {
557                 len += sprintf(page + len, PRINTK_HEADER
558                                " CCW %p: %08X %08X DAT:",
559                                act, ((int *) act)[0], ((int *) act)[1]);
560                 for (count = 0; count < 32 && count < act->count;
561                      count += sizeof(int))
562                         len += sprintf(page + len, " %08X",
563                                        ((int *) (addr_t) act->cda)
564                                        [(count>>2)]);
565                 len += sprintf(page + len, "\n");
566                 act++;
567         }
568         if (len > 0)
569                 printk(KERN_ERR "%s", page);
570         free_page((unsigned long) page);
571 }
572 
573 /*
574  * max_blocks is dependent on the amount of storage that is available
575  * in the static io buffer for each device. Currently each device has
576  * 8192 bytes (=2 pages). For 64 bit one dasd_mchunkt_t structure has
577  * 24 bytes, the struct dasd_ccw_req has 136 bytes and each block can use
578  * up to 16 bytes (8 for the ccw and 8 for the idal pointer). In
579  * addition we have one define extent ccw + 16 bytes of data and a
580  * locate record ccw for each block (stupid devices!) + 16 bytes of data.
581  * That makes:
582  * (8192 - 24 - 136 - 8 - 16) / 40 = 200.2 blocks at maximum.
583  * We want to fit two into the available memory so that we can immediately
584  * start the next request if one finishes off. That makes 100.1 blocks
585  * for one request. Give a little safety and the result is 96.
586  */
587 static struct dasd_discipline dasd_fba_discipline = {
588         .owner = THIS_MODULE,
589         .name = "FBA ",
590         .ebcname = "FBA ",
591         .max_blocks = 96,
592         .check_device = dasd_fba_check_characteristics,
593         .do_analysis = dasd_fba_do_analysis,
594         .verify_path = dasd_generic_verify_path,
595         .fill_geometry = dasd_fba_fill_geometry,
596         .start_IO = dasd_start_IO,
597         .term_IO = dasd_term_IO,
598         .handle_terminated_request = dasd_fba_handle_terminated_request,
599         .erp_action = dasd_fba_erp_action,
600         .erp_postaction = dasd_fba_erp_postaction,
601         .check_for_device_change = dasd_fba_check_for_device_change,
602         .build_cp = dasd_fba_build_cp,
603         .free_cp = dasd_fba_free_cp,
604         .dump_sense = dasd_fba_dump_sense,
605         .dump_sense_dbf = dasd_fba_dump_sense_dbf,
606         .fill_info = dasd_fba_fill_info,
607 };
608 
609 static int __init
610 dasd_fba_init(void)
611 {
612         int ret;
613 
614         ASCEBC(dasd_fba_discipline.ebcname, 4);
615         ret = ccw_driver_register(&dasd_fba_driver);
616         if (!ret)
617                 wait_for_device_probe();
618 
619         return ret;
620 }
621 
622 static void __exit
623 dasd_fba_cleanup(void)
624 {
625         ccw_driver_unregister(&dasd_fba_driver);
626 }
627 
628 module_init(dasd_fba_init);
629 module_exit(dasd_fba_cleanup);
630 

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