Version:  2.0.40 2.2.26 2.4.37 3.5 3.6 3.7 3.8 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

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 (idal_is_needed (page_address(bv.bv_page), bv.bv_len))
291                         cidaw += bv.bv_len / blksize;
292         }
293         /* Paranoia. */
294         if (count != last_rec - first_rec + 1)
295                 return ERR_PTR(-EINVAL);
296         /* 1x define extent + 1x locate record + number of blocks */
297         cplength = 2 + count;
298         /* 1x define extent + 1x locate record */
299         datasize = sizeof(struct DE_fba_data) + sizeof(struct LO_fba_data) +
300                 cidaw * sizeof(unsigned long);
301         /*
302          * Find out number of additional locate record ccws if the device
303          * can't do data chaining.
304          */
305         if (private->rdc_data.mode.bits.data_chain == 0) {
306                 cplength += count - 1;
307                 datasize += (count - 1)*sizeof(struct LO_fba_data);
308         }
309         /* Allocate the ccw request. */
310         cqr = dasd_smalloc_request(DASD_FBA_MAGIC, cplength, datasize, memdev);
311         if (IS_ERR(cqr))
312                 return cqr;
313         ccw = cqr->cpaddr;
314         /* First ccw is define extent. */
315         define_extent(ccw++, cqr->data, rq_data_dir(req),
316                       block->bp_block, blk_rq_pos(req), blk_rq_sectors(req));
317         /* Build locate_record + read/write ccws. */
318         idaws = (unsigned long *) (cqr->data + sizeof(struct DE_fba_data));
319         LO_data = (struct LO_fba_data *) (idaws + cidaw);
320         /* Locate record for all blocks for smart devices. */
321         if (private->rdc_data.mode.bits.data_chain != 0) {
322                 ccw[-1].flags |= CCW_FLAG_CC;
323                 locate_record(ccw++, LO_data++, rq_data_dir(req), 0, count);
324         }
325         recid = first_rec;
326         rq_for_each_segment(bv, req, iter) {
327                 dst = page_address(bv.bv_page) + bv.bv_offset;
328                 if (dasd_page_cache) {
329                         char *copy = kmem_cache_alloc(dasd_page_cache,
330                                                       GFP_DMA | __GFP_NOWARN);
331                         if (copy && rq_data_dir(req) == WRITE)
332                                 memcpy(copy + bv.bv_offset, dst, bv.bv_len);
333                         if (copy)
334                                 dst = copy + bv.bv_offset;
335                 }
336                 for (off = 0; off < bv.bv_len; off += blksize) {
337                         /* Locate record for stupid devices. */
338                         if (private->rdc_data.mode.bits.data_chain == 0) {
339                                 ccw[-1].flags |= CCW_FLAG_CC;
340                                 locate_record(ccw, LO_data++,
341                                               rq_data_dir(req),
342                                               recid - first_rec, 1);
343                                 ccw->flags = CCW_FLAG_CC;
344                                 ccw++;
345                         } else {
346                                 if (recid > first_rec)
347                                         ccw[-1].flags |= CCW_FLAG_DC;
348                                 else
349                                         ccw[-1].flags |= CCW_FLAG_CC;
350                         }
351                         ccw->cmd_code = cmd;
352                         ccw->count = block->bp_block;
353                         if (idal_is_needed(dst, blksize)) {
354                                 ccw->cda = (__u32)(addr_t) idaws;
355                                 ccw->flags = CCW_FLAG_IDA;
356                                 idaws = idal_create_words(idaws, dst, blksize);
357                         } else {
358                                 ccw->cda = (__u32)(addr_t) dst;
359                                 ccw->flags = 0;
360                         }
361                         ccw++;
362                         dst += blksize;
363                         recid++;
364                 }
365         }
366         if (blk_noretry_request(req) ||
367             block->base->features & DASD_FEATURE_FAILFAST)
368                 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
369         cqr->startdev = memdev;
370         cqr->memdev = memdev;
371         cqr->block = block;
372         cqr->expires = memdev->default_expires * HZ;    /* default 5 minutes */
373         cqr->retries = memdev->default_retries;
374         cqr->buildclk = get_tod_clock();
375         cqr->status = DASD_CQR_FILLED;
376         return cqr;
377 }
378 
379 static int
380 dasd_fba_free_cp(struct dasd_ccw_req *cqr, struct request *req)
381 {
382         struct dasd_fba_private *private;
383         struct ccw1 *ccw;
384         struct req_iterator iter;
385         struct bio_vec bv;
386         char *dst, *cda;
387         unsigned int blksize, off;
388         int status;
389 
390         if (!dasd_page_cache)
391                 goto out;
392         private = (struct dasd_fba_private *) cqr->block->base->private;
393         blksize = cqr->block->bp_block;
394         ccw = cqr->cpaddr;
395         /* Skip over define extent & locate record. */
396         ccw++;
397         if (private->rdc_data.mode.bits.data_chain != 0)
398                 ccw++;
399         rq_for_each_segment(bv, req, iter) {
400                 dst = page_address(bv.bv_page) + bv.bv_offset;
401                 for (off = 0; off < bv.bv_len; off += blksize) {
402                         /* Skip locate record. */
403                         if (private->rdc_data.mode.bits.data_chain == 0)
404                                 ccw++;
405                         if (dst) {
406                                 if (ccw->flags & CCW_FLAG_IDA)
407                                         cda = *((char **)((addr_t) ccw->cda));
408                                 else
409                                         cda = (char *)((addr_t) ccw->cda);
410                                 if (dst != cda) {
411                                         if (rq_data_dir(req) == READ)
412                                                 memcpy(dst, cda, bv.bv_len);
413                                         kmem_cache_free(dasd_page_cache,
414                                             (void *)((addr_t)cda & PAGE_MASK));
415                                 }
416                                 dst = NULL;
417                         }
418                         ccw++;
419                 }
420         }
421 out:
422         status = cqr->status == DASD_CQR_DONE;
423         dasd_sfree_request(cqr, cqr->memdev);
424         return status;
425 }
426 
427 static void dasd_fba_handle_terminated_request(struct dasd_ccw_req *cqr)
428 {
429         if (cqr->retries < 0)
430                 cqr->status = DASD_CQR_FAILED;
431         else
432                 cqr->status = DASD_CQR_FILLED;
433 };
434 
435 static int
436 dasd_fba_fill_info(struct dasd_device * device,
437                    struct dasd_information2_t * info)
438 {
439         info->label_block = 1;
440         info->FBA_layout = 1;
441         info->format = DASD_FORMAT_LDL;
442         info->characteristics_size = sizeof(struct dasd_fba_characteristics);
443         memcpy(info->characteristics,
444                &((struct dasd_fba_private *) device->private)->rdc_data,
445                sizeof (struct dasd_fba_characteristics));
446         info->confdata_size = 0;
447         return 0;
448 }
449 
450 static void
451 dasd_fba_dump_sense_dbf(struct dasd_device *device, struct irb *irb,
452                         char *reason)
453 {
454         u64 *sense;
455 
456         sense = (u64 *) dasd_get_sense(irb);
457         if (sense) {
458                 DBF_DEV_EVENT(DBF_EMERG, device,
459                               "%s: %s %02x%02x%02x %016llx %016llx %016llx "
460                               "%016llx", reason,
461                               scsw_is_tm(&irb->scsw) ? "t" : "c",
462                               scsw_cc(&irb->scsw), scsw_cstat(&irb->scsw),
463                               scsw_dstat(&irb->scsw), sense[0], sense[1],
464                               sense[2], sense[3]);
465         } else {
466                 DBF_DEV_EVENT(DBF_EMERG, device, "%s",
467                               "SORRY - NO VALID SENSE AVAILABLE\n");
468         }
469 }
470 
471 
472 static void
473 dasd_fba_dump_sense(struct dasd_device *device, struct dasd_ccw_req * req,
474                     struct irb *irb)
475 {
476         char *page;
477         struct ccw1 *act, *end, *last;
478         int len, sl, sct, count;
479 
480         page = (char *) get_zeroed_page(GFP_ATOMIC);
481         if (page == NULL) {
482                 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
483                             "No memory to dump sense data");
484                 return;
485         }
486         len = sprintf(page, PRINTK_HEADER
487                       " I/O status report for device %s:\n",
488                       dev_name(&device->cdev->dev));
489         len += sprintf(page + len, PRINTK_HEADER
490                        " in req: %p CS: 0x%02X DS: 0x%02X\n", req,
491                        irb->scsw.cmd.cstat, irb->scsw.cmd.dstat);
492         len += sprintf(page + len, PRINTK_HEADER
493                        " device %s: Failing CCW: %p\n",
494                        dev_name(&device->cdev->dev),
495                        (void *) (addr_t) irb->scsw.cmd.cpa);
496         if (irb->esw.esw0.erw.cons) {
497                 for (sl = 0; sl < 4; sl++) {
498                         len += sprintf(page + len, PRINTK_HEADER
499                                        " Sense(hex) %2d-%2d:",
500                                        (8 * sl), ((8 * sl) + 7));
501 
502                         for (sct = 0; sct < 8; sct++) {
503                                 len += sprintf(page + len, " %02x",
504                                                irb->ecw[8 * sl + sct]);
505                         }
506                         len += sprintf(page + len, "\n");
507                 }
508         } else {
509                 len += sprintf(page + len, PRINTK_HEADER
510                                " SORRY - NO VALID SENSE AVAILABLE\n");
511         }
512         printk(KERN_ERR "%s", page);
513 
514         /* dump the Channel Program */
515         /* print first CCWs (maximum 8) */
516         act = req->cpaddr;
517         for (last = act; last->flags & (CCW_FLAG_CC | CCW_FLAG_DC); last++);
518         end = min(act + 8, last);
519         len = sprintf(page, PRINTK_HEADER " Related CP in req: %p\n", req);
520         while (act <= end) {
521                 len += sprintf(page + len, PRINTK_HEADER
522                                " CCW %p: %08X %08X DAT:",
523                                act, ((int *) act)[0], ((int *) act)[1]);
524                 for (count = 0; count < 32 && count < act->count;
525                      count += sizeof(int))
526                         len += sprintf(page + len, " %08X",
527                                        ((int *) (addr_t) act->cda)
528                                        [(count>>2)]);
529                 len += sprintf(page + len, "\n");
530                 act++;
531         }
532         printk(KERN_ERR "%s", page);
533 
534 
535         /* print failing CCW area */
536         len = 0;
537         if (act <  ((struct ccw1 *)(addr_t) irb->scsw.cmd.cpa) - 2) {
538                 act = ((struct ccw1 *)(addr_t) irb->scsw.cmd.cpa) - 2;
539                 len += sprintf(page + len, PRINTK_HEADER "......\n");
540         }
541         end = min((struct ccw1 *)(addr_t) irb->scsw.cmd.cpa + 2, last);
542         while (act <= end) {
543                 len += sprintf(page + len, PRINTK_HEADER
544                                " CCW %p: %08X %08X DAT:",
545                                act, ((int *) act)[0], ((int *) act)[1]);
546                 for (count = 0; count < 32 && count < act->count;
547                      count += sizeof(int))
548                         len += sprintf(page + len, " %08X",
549                                        ((int *) (addr_t) act->cda)
550                                        [(count>>2)]);
551                 len += sprintf(page + len, "\n");
552                 act++;
553         }
554 
555         /* print last CCWs */
556         if (act <  last - 2) {
557                 act = last - 2;
558                 len += sprintf(page + len, PRINTK_HEADER "......\n");
559         }
560         while (act <= last) {
561                 len += sprintf(page + len, PRINTK_HEADER
562                                " CCW %p: %08X %08X DAT:",
563                                act, ((int *) act)[0], ((int *) act)[1]);
564                 for (count = 0; count < 32 && count < act->count;
565                      count += sizeof(int))
566                         len += sprintf(page + len, " %08X",
567                                        ((int *) (addr_t) act->cda)
568                                        [(count>>2)]);
569                 len += sprintf(page + len, "\n");
570                 act++;
571         }
572         if (len > 0)
573                 printk(KERN_ERR "%s", page);
574         free_page((unsigned long) page);
575 }
576 
577 /*
578  * max_blocks is dependent on the amount of storage that is available
579  * in the static io buffer for each device. Currently each device has
580  * 8192 bytes (=2 pages). For 64 bit one dasd_mchunkt_t structure has
581  * 24 bytes, the struct dasd_ccw_req has 136 bytes and each block can use
582  * up to 16 bytes (8 for the ccw and 8 for the idal pointer). In
583  * addition we have one define extent ccw + 16 bytes of data and a
584  * locate record ccw for each block (stupid devices!) + 16 bytes of data.
585  * That makes:
586  * (8192 - 24 - 136 - 8 - 16) / 40 = 200.2 blocks at maximum.
587  * We want to fit two into the available memory so that we can immediately
588  * start the next request if one finishes off. That makes 100.1 blocks
589  * for one request. Give a little safety and the result is 96.
590  */
591 static struct dasd_discipline dasd_fba_discipline = {
592         .owner = THIS_MODULE,
593         .name = "FBA ",
594         .ebcname = "FBA ",
595         .max_blocks = 96,
596         .check_device = dasd_fba_check_characteristics,
597         .do_analysis = dasd_fba_do_analysis,
598         .verify_path = dasd_generic_verify_path,
599         .fill_geometry = dasd_fba_fill_geometry,
600         .start_IO = dasd_start_IO,
601         .term_IO = dasd_term_IO,
602         .handle_terminated_request = dasd_fba_handle_terminated_request,
603         .erp_action = dasd_fba_erp_action,
604         .erp_postaction = dasd_fba_erp_postaction,
605         .check_for_device_change = dasd_fba_check_for_device_change,
606         .build_cp = dasd_fba_build_cp,
607         .free_cp = dasd_fba_free_cp,
608         .dump_sense = dasd_fba_dump_sense,
609         .dump_sense_dbf = dasd_fba_dump_sense_dbf,
610         .fill_info = dasd_fba_fill_info,
611 };
612 
613 static int __init
614 dasd_fba_init(void)
615 {
616         int ret;
617 
618         ASCEBC(dasd_fba_discipline.ebcname, 4);
619         ret = ccw_driver_register(&dasd_fba_driver);
620         if (!ret)
621                 wait_for_device_probe();
622 
623         return ret;
624 }
625 
626 static void __exit
627 dasd_fba_cleanup(void)
628 {
629         ccw_driver_unregister(&dasd_fba_driver);
630 }
631 
632 module_init(dasd_fba_init);
633 module_exit(dasd_fba_cleanup);
634 

This page was automatically generated by LXR 0.3.1 (source).  •  Linux is a registered trademark of Linus Torvalds  •  Contact us