drivers/s390/block/dasd_fba.c

   1 /*
   2  * File...........: linux/drivers/s390/block/dasd_fba.c
   3  * Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com>
   4  * Bugreports.to..: <Linux390@de.ibm.com>
   5  * (C) IBM Corporation, IBM Deutschland Entwicklung GmbH, 1999,2000
   6  *
   7  */
   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/todclk.h>
  23 #include <asm/ccwdev.h>
  24
  25 #include "dasd_int.h"
  26 #include "dasd_fba.h"
  27
  28 #ifdef PRINTK_HEADER
  29 #undef PRINTK_HEADER
  30 #endif                          /* PRINTK_HEADER */
  31 #define PRINTK_HEADER "dasd(fba):"
  32
  33 #define DASD_FBA_CCW_WRITE 0x41
  34 #define DASD_FBA_CCW_READ 0x42
  35 #define DASD_FBA_CCW_LOCATE 0x43
  36 #define DASD_FBA_CCW_DEFINE_EXTENT 0x63
  37
  38 MODULE_LICENSE("GPL");
  39
  40 static struct dasd_discipline dasd_fba_discipline;
  41
  42 struct dasd_fba_private {
  43         struct dasd_fba_characteristics rdc_data;
  44 };
  45
  46 static struct ccw_device_id dasd_fba_ids[] = {
  47         { CCW_DEVICE_DEVTYPE (0x6310, 0, 0x9336, 0), .driver_info = 0x1},
  48         { CCW_DEVICE_DEVTYPE (0x3880, 0, 0x3370, 0), .driver_info = 0x2},
  49         { /* end of list */ },
  50 };
  51
  52 MODULE_DEVICE_TABLE(ccw, dasd_fba_ids);
  53
  54 static struct ccw_driver dasd_fba_driver; /* see below */
  55 static int
  56 dasd_fba_probe(struct ccw_device *cdev)
  57 {
  58         return dasd_generic_probe(cdev, &dasd_fba_discipline);
  59 }
  60
  61 static int
  62 dasd_fba_set_online(struct ccw_device *cdev)
  63 {
  64         return dasd_generic_set_online(cdev, &dasd_fba_discipline);
  65 }
  66
  67 static struct ccw_driver dasd_fba_driver = {
  68         .name        = "dasd-fba",
  69         .owner       = THIS_MODULE,
  70         .ids         = dasd_fba_ids,
  71         .probe       = dasd_fba_probe,
  72         .remove      = dasd_generic_remove,
  73         .set_offline = dasd_generic_set_offline,
  74         .set_online  = dasd_fba_set_online,
  75         .notify      = dasd_generic_notify,
  76 };
  77
  78 static void
  79 define_extent(struct ccw1 * ccw, struct DE_fba_data *data, int rw,
  80               int blksize, int beg, int nr)
  81 {
  82         ccw->cmd_code = DASD_FBA_CCW_DEFINE_EXTENT;
  83         ccw->flags = 0;
  84         ccw->count = 16;
  85         ccw->cda = (__u32) __pa(data);
  86         memset(data, 0, sizeof (struct DE_fba_data));
  87         if (rw == WRITE)
  88                 (data->mask).perm = 0x0;
  89         else if (rw == READ)
  90                 (data->mask).perm = 0x1;
  91         else
  92                 data->mask.perm = 0x2;
  93         data->blk_size = blksize;
  94         data->ext_loc = beg;
  95         data->ext_end = nr - 1;
  96 }
  97
  98 static void
  99 locate_record(struct ccw1 * ccw, struct LO_fba_data *data, int rw,
 100               int block_nr, int block_ct)
 101 {
 102         ccw->cmd_code = DASD_FBA_CCW_LOCATE;
 103         ccw->flags = 0;
 104         ccw->count = 8;
 105         ccw->cda = (__u32) __pa(data);
 106         memset(data, 0, sizeof (struct LO_fba_data));
 107         if (rw == WRITE)
 108                 data->operation.cmd = 0x5;
 109         else if (rw == READ)
 110                 data->operation.cmd = 0x6;
 111         else
 112                 data->operation.cmd = 0x8;
 113         data->blk_nr = block_nr;
 114         data->blk_ct = block_ct;
 115 }
 116
 117 static int
 118 dasd_fba_check_characteristics(struct dasd_device *device)
 119 {
 120         struct dasd_block *block;
 121         struct dasd_fba_private *private;
 122         struct ccw_device *cdev = device->cdev;
 123         void *rdc_data;
 124         int rc;
 125
 126         private = (struct dasd_fba_private *) device->private;
 127         if (private == NULL) {
 128                 private = kzalloc(sizeof(struct dasd_fba_private),
 129                                   GFP_KERNEL | GFP_DMA);
 130                 if (private == NULL) {
 131                         DEV_MESSAGE(KERN_WARNING, device, "%s",
 132                                     "memory allocation failed for private "
 133                                     "data");
 134                         return -ENOMEM;
 135                 }
 136                 device->private = (void *) private;
 137         }
 138         block = dasd_alloc_block();
 139         if (IS_ERR(block)) {
 140                 DEV_MESSAGE(KERN_WARNING, device, "%s",
 141                             "could not allocate dasd block structure");
 142                 kfree(device->private);
 143                 return PTR_ERR(block);
 144         }
 145         device->block = block;
 146         block->base = device;
 147
 148         /* Read Device Characteristics */
 149         rdc_data = (void *) &(private->rdc_data);
 150         rc = dasd_generic_read_dev_chars(device, "FBA ", &rdc_data, 32);
 151         if (rc) {
 152                 DEV_MESSAGE(KERN_WARNING, device,
 153                             "Read device characteristics returned error %d",
 154                             rc);
 155                 return rc;
 156         }
 157
 158         DEV_MESSAGE(KERN_INFO, device,
 159                     "%04X/%02X(CU:%04X/%02X) %dMB at(%d B/blk)",
 160                     cdev->id.dev_type,
 161                     cdev->id.dev_model,
 162                     cdev->id.cu_type,
 163                     cdev->id.cu_model,
 164                     ((private->rdc_data.blk_bdsa *
 165                       (private->rdc_data.blk_size >> 9)) >> 11),
 166                     private->rdc_data.blk_size);
 167         return 0;
 168 }
 169
 170 static int dasd_fba_do_analysis(struct dasd_block *block)
 171 {
 172         struct dasd_fba_private *private;
 173         int sb, rc;
 174
 175         private = (struct dasd_fba_private *) block->base->private;
 176         rc = dasd_check_blocksize(private->rdc_data.blk_size);
 177         if (rc) {
 178                 DEV_MESSAGE(KERN_INFO, block->base, "unknown blocksize %d",
 179                             private->rdc_data.blk_size);
 180                 return rc;
 181         }
 182         block->blocks = private->rdc_data.blk_bdsa;
 183         block->bp_block = private->rdc_data.blk_size;
 184         block->s2b_shift = 0;   /* bits to shift 512 to get a block */
 185         for (sb = 512; sb < private->rdc_data.blk_size; sb = sb << 1)
 186                 block->s2b_shift++;
 187         return 0;
 188 }
 189
 190 static int dasd_fba_fill_geometry(struct dasd_block *block,
 191                                   struct hd_geometry *geo)
 192 {
 193         if (dasd_check_blocksize(block->bp_block) != 0)
 194                 return -EINVAL;
 195         geo->cylinders = (block->blocks << block->s2b_shift) >> 10;
 196         geo->heads = 16;
 197         geo->sectors = 128 >> block->s2b_shift;
 198         return 0;
 199 }
 200
 201 static dasd_erp_fn_t
 202 dasd_fba_erp_action(struct dasd_ccw_req * cqr)
 203 {
 204         return dasd_default_erp_action;
 205 }
 206
 207 static dasd_erp_fn_t
 208 dasd_fba_erp_postaction(struct dasd_ccw_req * cqr)
 209 {
 210         if (cqr->function == dasd_default_erp_action)
 211                 return dasd_default_erp_postaction;
 212
 213         DEV_MESSAGE(KERN_WARNING, cqr->startdev, "unknown ERP action %p",
 214                     cqr->function);
 215         return NULL;
 216 }
 217
 218 static void dasd_fba_handle_unsolicited_interrupt(struct dasd_device *device,
 219                                                    struct irb *irb)
 220 {
 221         char mask;
 222
 223         /* first of all check for state change pending interrupt */
 224         mask = DEV_STAT_ATTENTION | DEV_STAT_DEV_END | DEV_STAT_UNIT_EXCEP;
 225         if ((irb->scsw.cmd.dstat & mask) == mask) {
 226                 dasd_generic_handle_state_change(device);
 227                 return;
 228         }
 229
 230         /* check for unsolicited interrupts */
 231         DEV_MESSAGE(KERN_DEBUG, device, "%s",
 232                     "unsolicited interrupt received");
 233         device->discipline->dump_sense(device, NULL, irb);
 234         dasd_schedule_device_bh(device);
 235         return;
 236 };
 237
 238 static struct dasd_ccw_req *dasd_fba_build_cp(struct dasd_device * memdev,
 239                                               struct dasd_block *block,
 240                                               struct request *req)
 241 {
 242         struct dasd_fba_private *private;
 243         unsigned long *idaws;
 244         struct LO_fba_data *LO_data;
 245         struct dasd_ccw_req *cqr;
 246         struct ccw1 *ccw;
 247         struct req_iterator iter;
 248         struct bio_vec *bv;
 249         char *dst;
 250         int count, cidaw, cplength, datasize;
 251         sector_t recid, first_rec, last_rec;
 252         unsigned int blksize, off;
 253         unsigned char cmd;
 254
 255         private = (struct dasd_fba_private *) block->base->private;
 256         if (rq_data_dir(req) == READ) {
 257                 cmd = DASD_FBA_CCW_READ;
 258         } else if (rq_data_dir(req) == WRITE) {
 259                 cmd = DASD_FBA_CCW_WRITE;
 260         } else
 261                 return ERR_PTR(-EINVAL);
 262         blksize = block->bp_block;
 263         /* Calculate record id of first and last block. */
 264         first_rec = req->sector >> block->s2b_shift;
 265         last_rec = (req->sector + req->nr_sectors - 1) >> block->s2b_shift;
 266         /* Check struct bio and count the number of blocks for the request. */
 267         count = 0;
 268         cidaw = 0;
 269         rq_for_each_segment(bv, req, iter) {
 270                 if (bv->bv_len & (blksize - 1))
 271                         /* Fba can only do full blocks. */
 272                         return ERR_PTR(-EINVAL);
 273                 count += bv->bv_len >> (block->s2b_shift + 9);
 274 #if defined(CONFIG_64BIT)
 275                 if (idal_is_needed (page_address(bv->bv_page), bv->bv_len))
 276                         cidaw += bv->bv_len / blksize;
 277 #endif
 278         }
 279         /* Paranoia. */
 280         if (count != last_rec - first_rec + 1)
 281                 return ERR_PTR(-EINVAL);
 282         /* 1x define extent + 1x locate record + number of blocks */
 283         cplength = 2 + count;
 284         /* 1x define extent + 1x locate record */
 285         datasize = sizeof(struct DE_fba_data) + sizeof(struct LO_fba_data) +
 286                 cidaw * sizeof(unsigned long);
 287         /*
 288          * Find out number of additional locate record ccws if the device
 289          * can't do data chaining.
 290          */
 291         if (private->rdc_data.mode.bits.data_chain == 0) {
 292                 cplength += count - 1;
 293                 datasize += (count - 1)*sizeof(struct LO_fba_data);
 294         }
 295         /* Allocate the ccw request. */
 296         cqr = dasd_smalloc_request(dasd_fba_discipline.name,
 297                                    cplength, datasize, memdev);
 298         if (IS_ERR(cqr))
 299                 return cqr;
 300         ccw = cqr->cpaddr;
 301         /* First ccw is define extent. */
 302         define_extent(ccw++, cqr->data, rq_data_dir(req),
 303                       block->bp_block, req->sector, req->nr_sectors);
 304         /* Build locate_record + read/write ccws. */
 305         idaws = (unsigned long *) (cqr->data + sizeof(struct DE_fba_data));
 306         LO_data = (struct LO_fba_data *) (idaws + cidaw);
 307         /* Locate record for all blocks for smart devices. */
 308         if (private->rdc_data.mode.bits.data_chain != 0) {
 309                 ccw[-1].flags |= CCW_FLAG_CC;
 310                 locate_record(ccw++, LO_data++, rq_data_dir(req), 0, count);
 311         }
 312         recid = first_rec;
 313         rq_for_each_segment(bv, req, iter) {
 314                 dst = page_address(bv->bv_page) + bv->bv_offset;
 315                 if (dasd_page_cache) {
 316                         char *copy = kmem_cache_alloc(dasd_page_cache,
 317                                                       GFP_DMA | __GFP_NOWARN);
 318                         if (copy && rq_data_dir(req) == WRITE)
 319                                 memcpy(copy + bv->bv_offset, dst, bv->bv_len);
 320                         if (copy)
 321                                 dst = copy + bv->bv_offset;
 322                 }
 323                 for (off = 0; off < bv->bv_len; off += blksize) {
 324                         /* Locate record for stupid devices. */
 325                         if (private->rdc_data.mode.bits.data_chain == 0) {
 326                                 ccw[-1].flags |= CCW_FLAG_CC;
 327                                 locate_record(ccw, LO_data++,
 328                                               rq_data_dir(req),
 329                                               recid - first_rec, 1);
 330                                 ccw->flags = CCW_FLAG_CC;
 331                                 ccw++;
 332                         } else {
 333                                 if (recid > first_rec)
 334                                         ccw[-1].flags |= CCW_FLAG_DC;
 335                                 else
 336                                         ccw[-1].flags |= CCW_FLAG_CC;
 337                         }
 338                         ccw->cmd_code = cmd;
 339                         ccw->count = block->bp_block;
 340                         if (idal_is_needed(dst, blksize)) {
 341                                 ccw->cda = (__u32)(addr_t) idaws;
 342                                 ccw->flags = CCW_FLAG_IDA;
 343                                 idaws = idal_create_words(idaws, dst, blksize);
 344                         } else {
 345                                 ccw->cda = (__u32)(addr_t) dst;
 346                                 ccw->flags = 0;
 347                         }
 348                         ccw++;
 349                         dst += blksize;
 350                         recid++;
 351                 }
 352         }
 353         if (req->cmd_flags & REQ_FAILFAST)
 354                 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
 355         cqr->startdev = memdev;
 356         cqr->memdev = memdev;
 357         cqr->block = block;
 358         cqr->expires = 5 * 60 * HZ;     /* 5 minutes */
 359         cqr->retries = 32;
 360         cqr->buildclk = get_clock();
 361         cqr->status = DASD_CQR_FILLED;
 362         return cqr;
 363 }
 364
 365 static int
 366 dasd_fba_free_cp(struct dasd_ccw_req *cqr, struct request *req)
 367 {
 368         struct dasd_fba_private *private;
 369         struct ccw1 *ccw;
 370         struct req_iterator iter;
 371         struct bio_vec *bv;
 372         char *dst, *cda;
 373         unsigned int blksize, off;
 374         int status;
 375
 376         if (!dasd_page_cache)
 377                 goto out;
 378         private = (struct dasd_fba_private *) cqr->block->base->private;
 379         blksize = cqr->block->bp_block;
 380         ccw = cqr->cpaddr;
 381         /* Skip over define extent & locate record. */
 382         ccw++;
 383         if (private->rdc_data.mode.bits.data_chain != 0)
 384                 ccw++;
 385         rq_for_each_segment(bv, req, iter) {
 386                 dst = page_address(bv->bv_page) + bv->bv_offset;
 387                 for (off = 0; off < bv->bv_len; off += blksize) {
 388                         /* Skip locate record. */
 389                         if (private->rdc_data.mode.bits.data_chain == 0)
 390                                 ccw++;
 391                         if (dst) {
 392                                 if (ccw->flags & CCW_FLAG_IDA)
 393                                         cda = *((char **)((addr_t) ccw->cda));
 394                                 else
 395                                         cda = (char *)((addr_t) ccw->cda);
 396                                 if (dst != cda) {
 397                                         if (rq_data_dir(req) == READ)
 398                                                 memcpy(dst, cda, bv->bv_len);
 399                                         kmem_cache_free(dasd_page_cache,
 400                                             (void *)((addr_t)cda & PAGE_MASK));
 401                                 }
 402                                 dst = NULL;
 403                         }
 404                         ccw++;
 405                 }
 406         }
 407 out:
 408         status = cqr->status == DASD_CQR_DONE;
 409         dasd_sfree_request(cqr, cqr->memdev);
 410         return status;
 411 }
 412
 413 static void dasd_fba_handle_terminated_request(struct dasd_ccw_req *cqr)
 414 {
 415         cqr->status = DASD_CQR_FILLED;
 416 };
 417
 418 static int
 419 dasd_fba_fill_info(struct dasd_device * device,
 420                    struct dasd_information2_t * info)
 421 {
 422         info->label_block = 1;
 423         info->FBA_layout = 1;
 424         info->format = DASD_FORMAT_LDL;
 425         info->characteristics_size = sizeof(struct dasd_fba_characteristics);
 426         memcpy(info->characteristics,
 427                &((struct dasd_fba_private *) device->private)->rdc_data,
 428                sizeof (struct dasd_fba_characteristics));
 429         info->confdata_size = 0;
 430         return 0;
 431 }
 432
 433 static void
 434 dasd_fba_dump_sense(struct dasd_device *device, struct dasd_ccw_req * req,
 435                     struct irb *irb)
 436 {
 437         char *page;
 438         struct ccw1 *act, *end, *last;
 439         int len, sl, sct, count;
 440
 441         page = (char *) get_zeroed_page(GFP_ATOMIC);
 442         if (page == NULL) {
 443                 DEV_MESSAGE(KERN_ERR, device, " %s",
 444                             "No memory to dump sense data");
 445                 return;
 446         }
 447         len = sprintf(page, KERN_ERR PRINTK_HEADER
 448                       " I/O status report for device %s:\n",
 449                       device->cdev->dev.bus_id);
 450         len += sprintf(page + len, KERN_ERR PRINTK_HEADER
 451                        " in req: %p CS: 0x%02X DS: 0x%02X\n", req,
 452                        irb->scsw.cmd.cstat, irb->scsw.cmd.dstat);
 453         len += sprintf(page + len, KERN_ERR PRINTK_HEADER
 454                        " device %s: Failing CCW: %p\n",
 455                        device->cdev->dev.bus_id,
 456                        (void *) (addr_t) irb->scsw.cmd.cpa);
 457         if (irb->esw.esw0.erw.cons) {
 458                 for (sl = 0; sl < 4; sl++) {
 459                         len += sprintf(page + len, KERN_ERR PRINTK_HEADER
 460                                        " Sense(hex) %2d-%2d:",
 461                                        (8 * sl), ((8 * sl) + 7));
 462
 463                         for (sct = 0; sct < 8; sct++) {
 464                                 len += sprintf(page + len, " %02x",
 465                                                irb->ecw[8 * sl + sct]);
 466                         }
 467                         len += sprintf(page + len, "\n");
 468                 }
 469         } else {
 470                 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
 471                                " SORRY - NO VALID SENSE AVAILABLE\n");
 472         }
 473         MESSAGE_LOG(KERN_ERR, "%s",
 474                     page + sizeof(KERN_ERR PRINTK_HEADER));
 475
 476         /* dump the Channel Program */
 477         /* print first CCWs (maximum 8) */
 478         act = req->cpaddr;
 479         for (last = act; last->flags & (CCW_FLAG_CC | CCW_FLAG_DC); last++);
 480         end = min(act + 8, last);
 481         len = sprintf(page, KERN_ERR PRINTK_HEADER
 482                       " Related CP in req: %p\n", req);
 483         while (act <= end) {
 484                 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
 485                                " CCW %p: %08X %08X DAT:",
 486                                act, ((int *) act)[0], ((int *) act)[1]);
 487                 for (count = 0; count < 32 && count < act->count;
 488                      count += sizeof(int))
 489                         len += sprintf(page + len, " %08X",
 490                                        ((int *) (addr_t) act->cda)
 491                                        [(count>>2)]);
 492                 len += sprintf(page + len, "\n");
 493                 act++;
 494         }
 495         MESSAGE_LOG(KERN_ERR, "%s",
 496                     page + sizeof(KERN_ERR PRINTK_HEADER));
 497
 498
 499         /* print failing CCW area */
 500         len = 0;
 501         if (act <  ((struct ccw1 *)(addr_t) irb->scsw.cmd.cpa) - 2) {
 502                 act = ((struct ccw1 *)(addr_t) irb->scsw.cmd.cpa) - 2;
 503                 len += sprintf(page + len, KERN_ERR PRINTK_HEADER "......\n");
 504         }
 505         end = min((struct ccw1 *)(addr_t) irb->scsw.cmd.cpa + 2, last);
 506         while (act <= end) {
 507                 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
 508                                " CCW %p: %08X %08X DAT:",
 509                                act, ((int *) act)[0], ((int *) act)[1]);
 510                 for (count = 0; count < 32 && count < act->count;
 511                      count += sizeof(int))
 512                         len += sprintf(page + len, " %08X",
 513                                        ((int *) (addr_t) act->cda)
 514                                        [(count>>2)]);
 515                 len += sprintf(page + len, "\n");
 516                 act++;
 517         }
 518
 519         /* print last CCWs */
 520         if (act <  last - 2) {
 521                 act = last - 2;
 522                 len += sprintf(page + len, KERN_ERR PRINTK_HEADER "......\n");
 523         }
 524         while (act <= last) {
 525                 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
 526                                " CCW %p: %08X %08X DAT:",
 527                                act, ((int *) act)[0], ((int *) act)[1]);
 528                 for (count = 0; count < 32 && count < act->count;
 529                      count += sizeof(int))
 530                         len += sprintf(page + len, " %08X",
 531                                        ((int *) (addr_t) act->cda)
 532                                        [(count>>2)]);
 533                 len += sprintf(page + len, "\n");
 534                 act++;
 535         }
 536         if (len > 0)
 537                 MESSAGE_LOG(KERN_ERR, "%s",
 538                             page + sizeof(KERN_ERR PRINTK_HEADER));
 539         free_page((unsigned long) page);
 540 }
 541
 542 /*
 543  * max_blocks is dependent on the amount of storage that is available
 544  * in the static io buffer for each device. Currently each device has
 545  * 8192 bytes (=2 pages). For 64 bit one dasd_mchunkt_t structure has
 546  * 24 bytes, the struct dasd_ccw_req has 136 bytes and each block can use
 547  * up to 16 bytes (8 for the ccw and 8 for the idal pointer). In
 548  * addition we have one define extent ccw + 16 bytes of data and a
 549  * locate record ccw for each block (stupid devices!) + 16 bytes of data.
 550  * That makes:
 551  * (8192 - 24 - 136 - 8 - 16) / 40 = 200.2 blocks at maximum.
 552  * We want to fit two into the available memory so that we can immediately
 553  * start the next request if one finishes off. That makes 100.1 blocks
 554  * for one request. Give a little safety and the result is 96.
 555  */
 556 static struct dasd_discipline dasd_fba_discipline = {
 557         .owner = THIS_MODULE,
 558         .name = "FBA ",
 559         .ebcname = "FBA ",
 560         .max_blocks = 96,
 561         .check_device = dasd_fba_check_characteristics,
 562         .do_analysis = dasd_fba_do_analysis,
 563         .fill_geometry = dasd_fba_fill_geometry,
 564         .start_IO = dasd_start_IO,
 565         .term_IO = dasd_term_IO,
 566         .handle_terminated_request = dasd_fba_handle_terminated_request,
 567         .erp_action = dasd_fba_erp_action,
 568         .erp_postaction = dasd_fba_erp_postaction,
 569         .handle_unsolicited_interrupt = dasd_fba_handle_unsolicited_interrupt,
 570         .build_cp = dasd_fba_build_cp,
 571         .free_cp = dasd_fba_free_cp,
 572         .dump_sense = dasd_fba_dump_sense,
 573         .fill_info = dasd_fba_fill_info,
 574 };
 575
 576 static int __init
 577 dasd_fba_init(void)
 578 {
 579         ASCEBC(dasd_fba_discipline.ebcname, 4);
 580         return ccw_driver_register(&dasd_fba_driver);
 581 }
 582
 583 static void __exit
 584 dasd_fba_cleanup(void)
 585 {
 586         ccw_driver_unregister(&dasd_fba_driver);
 587 }
 588
 589 module_init(dasd_fba_init);
 590 module_exit(dasd_fba_cleanup);