Version:  2.0.40 2.2.26 2.4.37 2.6.39 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15

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_block *block;
129         struct dasd_fba_private *private;
130         struct ccw_device *cdev = device->cdev;
131         int rc;
132         int readonly;
133 
134         private = (struct dasd_fba_private *) device->private;
135         if (!private) {
136                 private = kzalloc(sizeof(*private), GFP_KERNEL | GFP_DMA);
137                 if (!private) {
138                         dev_warn(&device->cdev->dev,
139                                  "Allocating memory for private DASD "
140                                  "data failed\n");
141                         return -ENOMEM;
142                 }
143                 device->private = (void *) private;
144         } else {
145                 memset(private, 0, sizeof(*private));
146         }
147         block = dasd_alloc_block();
148         if (IS_ERR(block)) {
149                 DBF_EVENT_DEVID(DBF_WARNING, cdev, "%s", "could not allocate "
150                                 "dasd block structure");
151                 device->private = NULL;
152                 kfree(private);
153                 return PTR_ERR(block);
154         }
155         device->block = block;
156         block->base = device;
157 
158         /* Read Device Characteristics */
159         rc = dasd_generic_read_dev_chars(device, DASD_FBA_MAGIC,
160                                          &private->rdc_data, 32);
161         if (rc) {
162                 DBF_EVENT_DEVID(DBF_WARNING, cdev, "Read device "
163                                 "characteristics returned error %d", rc);
164                 device->block = NULL;
165                 dasd_free_block(block);
166                 device->private = NULL;
167                 kfree(private);
168                 return rc;
169         }
170 
171         device->default_expires = DASD_EXPIRES;
172         device->default_retries = FBA_DEFAULT_RETRIES;
173         device->path_data.opm = LPM_ANYPATH;
174 
175         readonly = dasd_device_is_ro(device);
176         if (readonly)
177                 set_bit(DASD_FLAG_DEVICE_RO, &device->flags);
178 
179         dev_info(&device->cdev->dev,
180                  "New FBA DASD %04X/%02X (CU %04X/%02X) with %d MB "
181                  "and %d B/blk%s\n",
182                  cdev->id.dev_type,
183                  cdev->id.dev_model,
184                  cdev->id.cu_type,
185                  cdev->id.cu_model,
186                  ((private->rdc_data.blk_bdsa *
187                    (private->rdc_data.blk_size >> 9)) >> 11),
188                  private->rdc_data.blk_size,
189                  readonly ? ", read-only device" : "");
190         return 0;
191 }
192 
193 static int dasd_fba_do_analysis(struct dasd_block *block)
194 {
195         struct dasd_fba_private *private;
196         int sb, rc;
197 
198         private = (struct dasd_fba_private *) block->base->private;
199         rc = dasd_check_blocksize(private->rdc_data.blk_size);
200         if (rc) {
201                 DBF_DEV_EVENT(DBF_WARNING, block->base, "unknown blocksize %d",
202                             private->rdc_data.blk_size);
203                 return rc;
204         }
205         block->blocks = private->rdc_data.blk_bdsa;
206         block->bp_block = private->rdc_data.blk_size;
207         block->s2b_shift = 0;   /* bits to shift 512 to get a block */
208         for (sb = 512; sb < private->rdc_data.blk_size; sb = sb << 1)
209                 block->s2b_shift++;
210         return 0;
211 }
212 
213 static int dasd_fba_fill_geometry(struct dasd_block *block,
214                                   struct hd_geometry *geo)
215 {
216         if (dasd_check_blocksize(block->bp_block) != 0)
217                 return -EINVAL;
218         geo->cylinders = (block->blocks << block->s2b_shift) >> 10;
219         geo->heads = 16;
220         geo->sectors = 128 >> block->s2b_shift;
221         return 0;
222 }
223 
224 static dasd_erp_fn_t
225 dasd_fba_erp_action(struct dasd_ccw_req * cqr)
226 {
227         return dasd_default_erp_action;
228 }
229 
230 static dasd_erp_fn_t
231 dasd_fba_erp_postaction(struct dasd_ccw_req * cqr)
232 {
233         if (cqr->function == dasd_default_erp_action)
234                 return dasd_default_erp_postaction;
235 
236         DBF_DEV_EVENT(DBF_WARNING, cqr->startdev, "unknown ERP action %p",
237                     cqr->function);
238         return NULL;
239 }
240 
241 static void dasd_fba_check_for_device_change(struct dasd_device *device,
242                                              struct dasd_ccw_req *cqr,
243                                              struct irb *irb)
244 {
245         char mask;
246 
247         /* first of all check for state change pending interrupt */
248         mask = DEV_STAT_ATTENTION | DEV_STAT_DEV_END | DEV_STAT_UNIT_EXCEP;
249         if ((irb->scsw.cmd.dstat & mask) == mask)
250                 dasd_generic_handle_state_change(device);
251 };
252 
253 static struct dasd_ccw_req *dasd_fba_build_cp(struct dasd_device * memdev,
254                                               struct dasd_block *block,
255                                               struct request *req)
256 {
257         struct dasd_fba_private *private;
258         unsigned long *idaws;
259         struct LO_fba_data *LO_data;
260         struct dasd_ccw_req *cqr;
261         struct ccw1 *ccw;
262         struct req_iterator iter;
263         struct bio_vec bv;
264         char *dst;
265         int count, cidaw, cplength, datasize;
266         sector_t recid, first_rec, last_rec;
267         unsigned int blksize, off;
268         unsigned char cmd;
269 
270         private = (struct dasd_fba_private *) block->base->private;
271         if (rq_data_dir(req) == READ) {
272                 cmd = DASD_FBA_CCW_READ;
273         } else if (rq_data_dir(req) == WRITE) {
274                 cmd = DASD_FBA_CCW_WRITE;
275         } else
276                 return ERR_PTR(-EINVAL);
277         blksize = block->bp_block;
278         /* Calculate record id of first and last block. */
279         first_rec = blk_rq_pos(req) >> block->s2b_shift;
280         last_rec =
281                 (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift;
282         /* Check struct bio and count the number of blocks for the request. */
283         count = 0;
284         cidaw = 0;
285         rq_for_each_segment(bv, req, iter) {
286                 if (bv.bv_len & (blksize - 1))
287                         /* Fba can only do full blocks. */
288                         return ERR_PTR(-EINVAL);
289                 count += bv.bv_len >> (block->s2b_shift + 9);
290 #if defined(CONFIG_64BIT)
291                 if (idal_is_needed (page_address(bv.bv_page), bv.bv_len))
292                         cidaw += bv.bv_len / blksize;
293 #endif
294         }
295         /* Paranoia. */
296         if (count != last_rec - first_rec + 1)
297                 return ERR_PTR(-EINVAL);
298         /* 1x define extent + 1x locate record + number of blocks */
299         cplength = 2 + count;
300         /* 1x define extent + 1x locate record */
301         datasize = sizeof(struct DE_fba_data) + sizeof(struct LO_fba_data) +
302                 cidaw * sizeof(unsigned long);
303         /*
304          * Find out number of additional locate record ccws if the device
305          * can't do data chaining.
306          */
307         if (private->rdc_data.mode.bits.data_chain == 0) {
308                 cplength += count - 1;
309                 datasize += (count - 1)*sizeof(struct LO_fba_data);
310         }
311         /* Allocate the ccw request. */
312         cqr = dasd_smalloc_request(DASD_FBA_MAGIC, cplength, datasize, memdev);
313         if (IS_ERR(cqr))
314                 return cqr;
315         ccw = cqr->cpaddr;
316         /* First ccw is define extent. */
317         define_extent(ccw++, cqr->data, rq_data_dir(req),
318                       block->bp_block, blk_rq_pos(req), blk_rq_sectors(req));
319         /* Build locate_record + read/write ccws. */
320         idaws = (unsigned long *) (cqr->data + sizeof(struct DE_fba_data));
321         LO_data = (struct LO_fba_data *) (idaws + cidaw);
322         /* Locate record for all blocks for smart devices. */
323         if (private->rdc_data.mode.bits.data_chain != 0) {
324                 ccw[-1].flags |= CCW_FLAG_CC;
325                 locate_record(ccw++, LO_data++, rq_data_dir(req), 0, count);
326         }
327         recid = first_rec;
328         rq_for_each_segment(bv, req, iter) {
329                 dst = page_address(bv.bv_page) + bv.bv_offset;
330                 if (dasd_page_cache) {
331                         char *copy = kmem_cache_alloc(dasd_page_cache,
332                                                       GFP_DMA | __GFP_NOWARN);
333                         if (copy && rq_data_dir(req) == WRITE)
334                                 memcpy(copy + bv.bv_offset, dst, bv.bv_len);
335                         if (copy)
336                                 dst = copy + bv.bv_offset;
337                 }
338                 for (off = 0; off < bv.bv_len; off += blksize) {
339                         /* Locate record for stupid devices. */
340                         if (private->rdc_data.mode.bits.data_chain == 0) {
341                                 ccw[-1].flags |= CCW_FLAG_CC;
342                                 locate_record(ccw, LO_data++,
343                                               rq_data_dir(req),
344                                               recid - first_rec, 1);
345                                 ccw->flags = CCW_FLAG_CC;
346                                 ccw++;
347                         } else {
348                                 if (recid > first_rec)
349                                         ccw[-1].flags |= CCW_FLAG_DC;
350                                 else
351                                         ccw[-1].flags |= CCW_FLAG_CC;
352                         }
353                         ccw->cmd_code = cmd;
354                         ccw->count = block->bp_block;
355                         if (idal_is_needed(dst, blksize)) {
356                                 ccw->cda = (__u32)(addr_t) idaws;
357                                 ccw->flags = CCW_FLAG_IDA;
358                                 idaws = idal_create_words(idaws, dst, blksize);
359                         } else {
360                                 ccw->cda = (__u32)(addr_t) dst;
361                                 ccw->flags = 0;
362                         }
363                         ccw++;
364                         dst += blksize;
365                         recid++;
366                 }
367         }
368         if (blk_noretry_request(req) ||
369             block->base->features & DASD_FEATURE_FAILFAST)
370                 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
371         cqr->startdev = memdev;
372         cqr->memdev = memdev;
373         cqr->block = block;
374         cqr->expires = memdev->default_expires * HZ;    /* default 5 minutes */
375         cqr->retries = memdev->default_retries;
376         cqr->buildclk = get_tod_clock();
377         cqr->status = DASD_CQR_FILLED;
378         return cqr;
379 }
380 
381 static int
382 dasd_fba_free_cp(struct dasd_ccw_req *cqr, struct request *req)
383 {
384         struct dasd_fba_private *private;
385         struct ccw1 *ccw;
386         struct req_iterator iter;
387         struct bio_vec bv;
388         char *dst, *cda;
389         unsigned int blksize, off;
390         int status;
391 
392         if (!dasd_page_cache)
393                 goto out;
394         private = (struct dasd_fba_private *) cqr->block->base->private;
395         blksize = cqr->block->bp_block;
396         ccw = cqr->cpaddr;
397         /* Skip over define extent & locate record. */
398         ccw++;
399         if (private->rdc_data.mode.bits.data_chain != 0)
400                 ccw++;
401         rq_for_each_segment(bv, req, iter) {
402                 dst = page_address(bv.bv_page) + bv.bv_offset;
403                 for (off = 0; off < bv.bv_len; off += blksize) {
404                         /* Skip locate record. */
405                         if (private->rdc_data.mode.bits.data_chain == 0)
406                                 ccw++;
407                         if (dst) {
408                                 if (ccw->flags & CCW_FLAG_IDA)
409                                         cda = *((char **)((addr_t) ccw->cda));
410                                 else
411                                         cda = (char *)((addr_t) ccw->cda);
412                                 if (dst != cda) {
413                                         if (rq_data_dir(req) == READ)
414                                                 memcpy(dst, cda, bv.bv_len);
415                                         kmem_cache_free(dasd_page_cache,
416                                             (void *)((addr_t)cda & PAGE_MASK));
417                                 }
418                                 dst = NULL;
419                         }
420                         ccw++;
421                 }
422         }
423 out:
424         status = cqr->status == DASD_CQR_DONE;
425         dasd_sfree_request(cqr, cqr->memdev);
426         return status;
427 }
428 
429 static void dasd_fba_handle_terminated_request(struct dasd_ccw_req *cqr)
430 {
431         if (cqr->retries < 0)
432                 cqr->status = DASD_CQR_FAILED;
433         else
434                 cqr->status = DASD_CQR_FILLED;
435 };
436 
437 static int
438 dasd_fba_fill_info(struct dasd_device * device,
439                    struct dasd_information2_t * info)
440 {
441         info->label_block = 1;
442         info->FBA_layout = 1;
443         info->format = DASD_FORMAT_LDL;
444         info->characteristics_size = sizeof(struct dasd_fba_characteristics);
445         memcpy(info->characteristics,
446                &((struct dasd_fba_private *) device->private)->rdc_data,
447                sizeof (struct dasd_fba_characteristics));
448         info->confdata_size = 0;
449         return 0;
450 }
451 
452 static void
453 dasd_fba_dump_sense_dbf(struct dasd_device *device, struct irb *irb,
454                         char *reason)
455 {
456         u64 *sense;
457 
458         sense = (u64 *) dasd_get_sense(irb);
459         if (sense) {
460                 DBF_DEV_EVENT(DBF_EMERG, device,
461                               "%s: %s %02x%02x%02x %016llx %016llx %016llx "
462                               "%016llx", reason,
463                               scsw_is_tm(&irb->scsw) ? "t" : "c",
464                               scsw_cc(&irb->scsw), scsw_cstat(&irb->scsw),
465                               scsw_dstat(&irb->scsw), sense[0], sense[1],
466                               sense[2], sense[3]);
467         } else {
468                 DBF_DEV_EVENT(DBF_EMERG, device, "%s",
469                               "SORRY - NO VALID SENSE AVAILABLE\n");
470         }
471 }
472 
473 
474 static void
475 dasd_fba_dump_sense(struct dasd_device *device, struct dasd_ccw_req * req,
476                     struct irb *irb)
477 {
478         char *page;
479         struct ccw1 *act, *end, *last;
480         int len, sl, sct, count;
481 
482         page = (char *) get_zeroed_page(GFP_ATOMIC);
483         if (page == NULL) {
484                 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
485                             "No memory to dump sense data");
486                 return;
487         }
488         len = sprintf(page, PRINTK_HEADER
489                       " I/O status report for device %s:\n",
490                       dev_name(&device->cdev->dev));
491         len += sprintf(page + len, PRINTK_HEADER
492                        " in req: %p CS: 0x%02X DS: 0x%02X\n", req,
493                        irb->scsw.cmd.cstat, irb->scsw.cmd.dstat);
494         len += sprintf(page + len, PRINTK_HEADER
495                        " device %s: Failing CCW: %p\n",
496                        dev_name(&device->cdev->dev),
497                        (void *) (addr_t) irb->scsw.cmd.cpa);
498         if (irb->esw.esw0.erw.cons) {
499                 for (sl = 0; sl < 4; sl++) {
500                         len += sprintf(page + len, PRINTK_HEADER
501                                        " Sense(hex) %2d-%2d:",
502                                        (8 * sl), ((8 * sl) + 7));
503 
504                         for (sct = 0; sct < 8; sct++) {
505                                 len += sprintf(page + len, " %02x",
506                                                irb->ecw[8 * sl + sct]);
507                         }
508                         len += sprintf(page + len, "\n");
509                 }
510         } else {
511                 len += sprintf(page + len, PRINTK_HEADER
512                                " SORRY - NO VALID SENSE AVAILABLE\n");
513         }
514         printk(KERN_ERR "%s", page);
515 
516         /* dump the Channel Program */
517         /* print first CCWs (maximum 8) */
518         act = req->cpaddr;
519         for (last = act; last->flags & (CCW_FLAG_CC | CCW_FLAG_DC); last++);
520         end = min(act + 8, last);
521         len = sprintf(page, PRINTK_HEADER " Related CP in req: %p\n", req);
522         while (act <= end) {
523                 len += sprintf(page + len, PRINTK_HEADER
524                                " CCW %p: %08X %08X DAT:",
525                                act, ((int *) act)[0], ((int *) act)[1]);
526                 for (count = 0; count < 32 && count < act->count;
527                      count += sizeof(int))
528                         len += sprintf(page + len, " %08X",
529                                        ((int *) (addr_t) act->cda)
530                                        [(count>>2)]);
531                 len += sprintf(page + len, "\n");
532                 act++;
533         }
534         printk(KERN_ERR "%s", page);
535 
536 
537         /* print failing CCW area */
538         len = 0;
539         if (act <  ((struct ccw1 *)(addr_t) irb->scsw.cmd.cpa) - 2) {
540                 act = ((struct ccw1 *)(addr_t) irb->scsw.cmd.cpa) - 2;
541                 len += sprintf(page + len, PRINTK_HEADER "......\n");
542         }
543         end = min((struct ccw1 *)(addr_t) irb->scsw.cmd.cpa + 2, last);
544         while (act <= end) {
545                 len += sprintf(page + len, PRINTK_HEADER
546                                " CCW %p: %08X %08X DAT:",
547                                act, ((int *) act)[0], ((int *) act)[1]);
548                 for (count = 0; count < 32 && count < act->count;
549                      count += sizeof(int))
550                         len += sprintf(page + len, " %08X",
551                                        ((int *) (addr_t) act->cda)
552                                        [(count>>2)]);
553                 len += sprintf(page + len, "\n");
554                 act++;
555         }
556 
557         /* print last CCWs */
558         if (act <  last - 2) {
559                 act = last - 2;
560                 len += sprintf(page + len, PRINTK_HEADER "......\n");
561         }
562         while (act <= last) {
563                 len += sprintf(page + len, PRINTK_HEADER
564                                " CCW %p: %08X %08X DAT:",
565                                act, ((int *) act)[0], ((int *) act)[1]);
566                 for (count = 0; count < 32 && count < act->count;
567                      count += sizeof(int))
568                         len += sprintf(page + len, " %08X",
569                                        ((int *) (addr_t) act->cda)
570                                        [(count>>2)]);
571                 len += sprintf(page + len, "\n");
572                 act++;
573         }
574         if (len > 0)
575                 printk(KERN_ERR "%s", page);
576         free_page((unsigned long) page);
577 }
578 
579 /*
580  * max_blocks is dependent on the amount of storage that is available
581  * in the static io buffer for each device. Currently each device has
582  * 8192 bytes (=2 pages). For 64 bit one dasd_mchunkt_t structure has
583  * 24 bytes, the struct dasd_ccw_req has 136 bytes and each block can use
584  * up to 16 bytes (8 for the ccw and 8 for the idal pointer). In
585  * addition we have one define extent ccw + 16 bytes of data and a
586  * locate record ccw for each block (stupid devices!) + 16 bytes of data.
587  * That makes:
588  * (8192 - 24 - 136 - 8 - 16) / 40 = 200.2 blocks at maximum.
589  * We want to fit two into the available memory so that we can immediately
590  * start the next request if one finishes off. That makes 100.1 blocks
591  * for one request. Give a little safety and the result is 96.
592  */
593 static struct dasd_discipline dasd_fba_discipline = {
594         .owner = THIS_MODULE,
595         .name = "FBA ",
596         .ebcname = "FBA ",
597         .max_blocks = 96,
598         .check_device = dasd_fba_check_characteristics,
599         .do_analysis = dasd_fba_do_analysis,
600         .verify_path = dasd_generic_verify_path,
601         .fill_geometry = dasd_fba_fill_geometry,
602         .start_IO = dasd_start_IO,
603         .term_IO = dasd_term_IO,
604         .handle_terminated_request = dasd_fba_handle_terminated_request,
605         .erp_action = dasd_fba_erp_action,
606         .erp_postaction = dasd_fba_erp_postaction,
607         .check_for_device_change = dasd_fba_check_for_device_change,
608         .build_cp = dasd_fba_build_cp,
609         .free_cp = dasd_fba_free_cp,
610         .dump_sense = dasd_fba_dump_sense,
611         .dump_sense_dbf = dasd_fba_dump_sense_dbf,
612         .fill_info = dasd_fba_fill_info,
613 };
614 
615 static int __init
616 dasd_fba_init(void)
617 {
618         int ret;
619 
620         ASCEBC(dasd_fba_discipline.ebcname, 4);
621         ret = ccw_driver_register(&dasd_fba_driver);
622         if (!ret)
623                 wait_for_device_probe();
624 
625         return ret;
626 }
627 
628 static void __exit
629 dasd_fba_cleanup(void)
630 {
631         ccw_driver_unregister(&dasd_fba_driver);
632 }
633 
634 module_init(dasd_fba_init);
635 module_exit(dasd_fba_cleanup);
636 

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