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                 device->private = NULL;
 143                 kfree(private);
 144                 return PTR_ERR(block);
 145         }
 146         device->block = block;
 147         block->base = device;
 148
 149         /* Read Device Characteristics */
 150         rdc_data = (void *) &(private->rdc_data);
 151         rc = dasd_generic_read_dev_chars(device, "FBA ", &rdc_data, 32);
 152         if (rc) {
 153                 DEV_MESSAGE(KERN_WARNING, device,
 154                             "Read device characteristics returned error %d",
 155                             rc);
 156                 device->block = NULL;
 157                 dasd_free_block(block);
 158                 device->private = NULL;
 159                 kfree(private);
 160                 return rc;
 161         }
 162
 163         DEV_MESSAGE(KERN_INFO, device,
 164                     "%04X/%02X(CU:%04X/%02X) %dMB at(%d B/blk)",
 165                     cdev->id.dev_type,
 166                     cdev->id.dev_model,
 167                     cdev->id.cu_type,
 168                     cdev->id.cu_model,
 169                     ((private->rdc_data.blk_bdsa *
 170                       (private->rdc_data.blk_size >> 9)) >> 11),
 171                     private->rdc_data.blk_size);
 172         return 0;
 173 }
 174
 175 static int dasd_fba_do_analysis(struct dasd_block *block)
 176 {
 177         struct dasd_fba_private *private;
 178         int sb, rc;
 179
 180         private = (struct dasd_fba_private *) block->base->private;
 181         rc = dasd_check_blocksize(private->rdc_data.blk_size);
 182         if (rc) {
 183                 DEV_MESSAGE(KERN_INFO, block->base, "unknown blocksize %d",
 184                             private->rdc_data.blk_size);
 185                 return rc;
 186         }
 187         block->blocks = private->rdc_data.blk_bdsa;
 188         block->bp_block = private->rdc_data.blk_size;
 189         block->s2b_shift = 0;   /* bits to shift 512 to get a block */
 190         for (sb = 512; sb < private->rdc_data.blk_size; sb = sb << 1)
 191                 block->s2b_shift++;
 192         return 0;
 193 }
 194
 195 static int dasd_fba_fill_geometry(struct dasd_block *block,
 196                                   struct hd_geometry *geo)
 197 {
 198         if (dasd_check_blocksize(block->bp_block) != 0)
 199                 return -EINVAL;
 200         geo->cylinders = (block->blocks << block->s2b_shift) >> 10;
 201         geo->heads = 16;
 202         geo->sectors = 128 >> block->s2b_shift;
 203         return 0;
 204 }
 205
 206 static dasd_erp_fn_t
 207 dasd_fba_erp_action(struct dasd_ccw_req * cqr)
 208 {
 209         return dasd_default_erp_action;
 210 }
 211
 212 static dasd_erp_fn_t
 213 dasd_fba_erp_postaction(struct dasd_ccw_req * cqr)
 214 {
 215         if (cqr->function == dasd_default_erp_action)
 216                 return dasd_default_erp_postaction;
 217
 218         DEV_MESSAGE(KERN_WARNING, cqr->startdev, "unknown ERP action %p",
 219                     cqr->function);
 220         return NULL;
 221 }
 222
 223 static void dasd_fba_handle_unsolicited_interrupt(struct dasd_device *device,
 224                                                    struct irb *irb)
 225 {
 226         char mask;
 227
 228         /* first of all check for state change pending interrupt */
 229         mask = DEV_STAT_ATTENTION | DEV_STAT_DEV_END | DEV_STAT_UNIT_EXCEP;
 230         if ((irb->scsw.cmd.dstat & mask) == mask) {
 231                 dasd_generic_handle_state_change(device);
 232                 return;
 233         }
 234
 235         /* check for unsolicited interrupts */
 236         DEV_MESSAGE(KERN_DEBUG, device, "%s",
 237                     "unsolicited interrupt received");
 238         device->discipline->dump_sense(device, NULL, irb);
 239         dasd_schedule_device_bh(device);
 240         return;
 241 };
 242
 243 static struct dasd_ccw_req *dasd_fba_build_cp(struct dasd_device * memdev,
 244                                               struct dasd_block *block,
 245                                               struct request *req)
 246 {
 247         struct dasd_fba_private *private;
 248         unsigned long *idaws;
 249         struct LO_fba_data *LO_data;
 250         struct dasd_ccw_req *cqr;
 251         struct ccw1 *ccw;
 252         struct req_iterator iter;
 253         struct bio_vec *bv;
 254         char *dst;
 255         int count, cidaw, cplength, datasize;
 256         sector_t recid, first_rec, last_rec;
 257         unsigned int blksize, off;
 258         unsigned char cmd;
 259
 260         private = (struct dasd_fba_private *) block->base->private;
 261         if (rq_data_dir(req) == READ) {
 262                 cmd = DASD_FBA_CCW_READ;
 263         } else if (rq_data_dir(req) == WRITE) {
 264                 cmd = DASD_FBA_CCW_WRITE;
 265         } else
 266                 return ERR_PTR(-EINVAL);
 267         blksize = block->bp_block;
 268         /* Calculate record id of first and last block. */
 269         first_rec = req->sector >> block->s2b_shift;
 270         last_rec = (req->sector + req->nr_sectors - 1) >> block->s2b_shift;
 271         /* Check struct bio and count the number of blocks for the request. */
 272         count = 0;
 273         cidaw = 0;
 274         rq_for_each_segment(bv, req, iter) {
 275                 if (bv->bv_len & (blksize - 1))
 276                         /* Fba can only do full blocks. */
 277                         return ERR_PTR(-EINVAL);
 278                 count += bv->bv_len >> (block->s2b_shift + 9);
 279 #if defined(CONFIG_64BIT)
 280                 if (idal_is_needed (page_address(bv->bv_page), bv->bv_len))
 281                         cidaw += bv->bv_len / blksize;
 282 #endif
 283         }
 284         /* Paranoia. */
 285         if (count != last_rec - first_rec + 1)
 286                 return ERR_PTR(-EINVAL);
 287         /* 1x define extent + 1x locate record + number of blocks */
 288         cplength = 2 + count;
 289         /* 1x define extent + 1x locate record */
 290         datasize = sizeof(struct DE_fba_data) + sizeof(struct LO_fba_data) +
 291                 cidaw * sizeof(unsigned long);
 292         /*
 293          * Find out number of additional locate record ccws if the device
 294          * can't do data chaining.
 295          */
 296         if (private->rdc_data.mode.bits.data_chain == 0) {
 297                 cplength += count - 1;
 298                 datasize += (count - 1)*sizeof(struct LO_fba_data);
 299         }
 300         /* Allocate the ccw request. */
 301         cqr = dasd_smalloc_request(dasd_fba_discipline.name,
 302                                    cplength, datasize, memdev);
 303         if (IS_ERR(cqr))
 304                 return cqr;
 305         ccw = cqr->cpaddr;
 306         /* First ccw is define extent. */
 307         define_extent(ccw++, cqr->data, rq_data_dir(req),
 308                       block->bp_block, req->sector, req->nr_sectors);
 309         /* Build locate_record + read/write ccws. */
 310         idaws = (unsigned long *) (cqr->data + sizeof(struct DE_fba_data));
 311         LO_data = (struct LO_fba_data *) (idaws + cidaw);
 312         /* Locate record for all blocks for smart devices. */
 313         if (private->rdc_data.mode.bits.data_chain != 0) {
 314                 ccw[-1].flags |= CCW_FLAG_CC;
 315                 locate_record(ccw++, LO_data++, rq_data_dir(req), 0, count);
 316         }
 317         recid = first_rec;
 318         rq_for_each_segment(bv, req, iter) {
 319                 dst = page_address(bv->bv_page) + bv->bv_offset;
 320                 if (dasd_page_cache) {
 321                         char *copy = kmem_cache_alloc(dasd_page_cache,
 322                                                       GFP_DMA | __GFP_NOWARN);
 323                         if (copy && rq_data_dir(req) == WRITE)
 324                                 memcpy(copy + bv->bv_offset, dst, bv->bv_len);
 325                         if (copy)
 326                                 dst = copy + bv->bv_offset;
 327                 }
 328                 for (off = 0; off < bv->bv_len; off += blksize) {
 329                         /* Locate record for stupid devices. */
 330                         if (private->rdc_data.mode.bits.data_chain == 0) {
 331                                 ccw[-1].flags |= CCW_FLAG_CC;
 332                                 locate_record(ccw, LO_data++,
 333                                               rq_data_dir(req),
 334                                               recid - first_rec, 1);
 335                                 ccw->flags = CCW_FLAG_CC;
 336                                 ccw++;
 337                         } else {
 338                                 if (recid > first_rec)
 339                                         ccw[-1].flags |= CCW_FLAG_DC;
 340                                 else
 341                                         ccw[-1].flags |= CCW_FLAG_CC;
 342                         }
 343                         ccw->cmd_code = cmd;
 344                         ccw->count = block->bp_block;
 345                         if (idal_is_needed(dst, blksize)) {
 346                                 ccw->cda = (__u32)(addr_t) idaws;
 347                                 ccw->flags = CCW_FLAG_IDA;
 348                                 idaws = idal_create_words(idaws, dst, blksize);
 349                         } else {
 350                                 ccw->cda = (__u32)(addr_t) dst;
 351                                 ccw->flags = 0;
 352                         }
 353                         ccw++;
 354                         dst += blksize;
 355                         recid++;
 356                 }
 357         }
 358         if (blk_noretry_request(req))
 359                 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
 360         cqr->startdev = memdev;
 361         cqr->memdev = memdev;
 362         cqr->block = block;
 363         cqr->expires = 5 * 60 * HZ;     /* 5 minutes */
 364         cqr->retries = 32;
 365         cqr->buildclk = get_clock();
 366         cqr->status = DASD_CQR_FILLED;
 367         return cqr;
 368 }
 369
 370 static int
 371 dasd_fba_free_cp(struct dasd_ccw_req *cqr, struct request *req)
 372 {
 373         struct dasd_fba_private *private;
 374         struct ccw1 *ccw;
 375         struct req_iterator iter;
 376         struct bio_vec *bv;
 377         char *dst, *cda;
 378         unsigned int blksize, off;
 379         int status;
 380
 381         if (!dasd_page_cache)
 382                 goto out;
 383         private = (struct dasd_fba_private *) cqr->block->base->private;
 384         blksize = cqr->block->bp_block;
 385         ccw = cqr->cpaddr;
 386         /* Skip over define extent & locate record. */
 387         ccw++;
 388         if (private->rdc_data.mode.bits.data_chain != 0)
 389                 ccw++;
 390         rq_for_each_segment(bv, req, iter) {
 391                 dst = page_address(bv->bv_page) + bv->bv_offset;
 392                 for (off = 0; off < bv->bv_len; off += blksize) {
 393                         /* Skip locate record. */
 394                         if (private->rdc_data.mode.bits.data_chain == 0)
 395                                 ccw++;
 396                         if (dst) {
 397                                 if (ccw->flags & CCW_FLAG_IDA)
 398                                         cda = *((char **)((addr_t) ccw->cda));
 399                                 else
 400                                         cda = (char *)((addr_t) ccw->cda);
 401                                 if (dst != cda) {
 402                                         if (rq_data_dir(req) == READ)
 403                                                 memcpy(dst, cda, bv->bv_len);
 404                                         kmem_cache_free(dasd_page_cache,
 405                                             (void *)((addr_t)cda & PAGE_MASK));
 406                                 }
 407                                 dst = NULL;
 408                         }
 409                         ccw++;
 410                 }
 411         }
 412 out:
 413         status = cqr->status == DASD_CQR_DONE;
 414         dasd_sfree_request(cqr, cqr->memdev);
 415         return status;
 416 }
 417
 418 static void dasd_fba_handle_terminated_request(struct dasd_ccw_req *cqr)
 419 {
 420         cqr->status = DASD_CQR_FILLED;
 421 };
 422
 423 static int
 424 dasd_fba_fill_info(struct dasd_device * device,
 425                    struct dasd_information2_t * info)
 426 {
 427         info->label_block = 1;
 428         info->FBA_layout = 1;
 429         info->format = DASD_FORMAT_LDL;
 430         info->characteristics_size = sizeof(struct dasd_fba_characteristics);
 431         memcpy(info->characteristics,
 432                &((struct dasd_fba_private *) device->private)->rdc_data,
 433                sizeof (struct dasd_fba_characteristics));
 434         info->confdata_size = 0;
 435         return 0;
 436 }
 437
 438 static void
 439 dasd_fba_dump_sense(struct dasd_device *device, struct dasd_ccw_req * req,
 440                     struct irb *irb)
 441 {
 442         char *page;
 443         struct ccw1 *act, *end, *last;
 444         int len, sl, sct, count;
 445
 446         page = (char *) get_zeroed_page(GFP_ATOMIC);
 447         if (page == NULL) {
 448                 DEV_MESSAGE(KERN_ERR, device, " %s",
 449                             "No memory to dump sense data");
 450                 return;
 451         }
 452         len = sprintf(page, KERN_ERR PRINTK_HEADER
 453                       " I/O status report for device %s:\n",
 454                       dev_name(&device->cdev->dev));
 455         len += sprintf(page + len, KERN_ERR PRINTK_HEADER
 456                        " in req: %p CS: 0x%02X DS: 0x%02X\n", req,
 457                        irb->scsw.cmd.cstat, irb->scsw.cmd.dstat);
 458         len += sprintf(page + len, KERN_ERR PRINTK_HEADER
 459                        " device %s: Failing CCW: %p\n",
 460                        dev_name(&device->cdev->dev),
 461                        (void *) (addr_t) irb->scsw.cmd.cpa);
 462         if (irb->esw.esw0.erw.cons) {
 463                 for (sl = 0; sl < 4; sl++) {
 464                         len += sprintf(page + len, KERN_ERR PRINTK_HEADER
 465                                        " Sense(hex) %2d-%2d:",
 466                                        (8 * sl), ((8 * sl) + 7));
 467
 468                         for (sct = 0; sct < 8; sct++) {
 469                                 len += sprintf(page + len, " %02x",
 470                                                irb->ecw[8 * sl + sct]);
 471                         }
 472                         len += sprintf(page + len, "\n");
 473                 }
 474         } else {
 475                 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
 476                                " SORRY - NO VALID SENSE AVAILABLE\n");
 477         }
 478         MESSAGE_LOG(KERN_ERR, "%s",
 479                     page + sizeof(KERN_ERR PRINTK_HEADER));
 480
 481         /* dump the Channel Program */
 482         /* print first CCWs (maximum 8) */
 483         act = req->cpaddr;
 484         for (last = act; last->flags & (CCW_FLAG_CC | CCW_FLAG_DC); last++);
 485         end = min(act + 8, last);
 486         len = sprintf(page, KERN_ERR PRINTK_HEADER
 487                       " Related CP in req: %p\n", req);
 488         while (act <= end) {
 489                 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
 490                                " CCW %p: %08X %08X DAT:",
 491                                act, ((int *) act)[0], ((int *) act)[1]);
 492                 for (count = 0; count < 32 && count < act->count;
 493                      count += sizeof(int))
 494                         len += sprintf(page + len, " %08X",
 495                                        ((int *) (addr_t) act->cda)
 496                                        [(count>>2)]);
 497                 len += sprintf(page + len, "\n");
 498                 act++;
 499         }
 500         MESSAGE_LOG(KERN_ERR, "%s",
 501                     page + sizeof(KERN_ERR PRINTK_HEADER));
 502
 503
 504         /* print failing CCW area */
 505         len = 0;
 506         if (act <  ((struct ccw1 *)(addr_t) irb->scsw.cmd.cpa) - 2) {
 507                 act = ((struct ccw1 *)(addr_t) irb->scsw.cmd.cpa) - 2;
 508                 len += sprintf(page + len, KERN_ERR PRINTK_HEADER "......\n");
 509         }
 510         end = min((struct ccw1 *)(addr_t) irb->scsw.cmd.cpa + 2, last);
 511         while (act <= end) {
 512                 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
 513                                " CCW %p: %08X %08X DAT:",
 514                                act, ((int *) act)[0], ((int *) act)[1]);
 515                 for (count = 0; count < 32 && count < act->count;
 516                      count += sizeof(int))
 517                         len += sprintf(page + len, " %08X",
 518                                        ((int *) (addr_t) act->cda)
 519                                        [(count>>2)]);
 520                 len += sprintf(page + len, "\n");
 521                 act++;
 522         }
 523
 524         /* print last CCWs */
 525         if (act <  last - 2) {
 526                 act = last - 2;
 527                 len += sprintf(page + len, KERN_ERR PRINTK_HEADER "......\n");
 528         }
 529         while (act <= last) {
 530                 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
 531                                " CCW %p: %08X %08X DAT:",
 532                                act, ((int *) act)[0], ((int *) act)[1]);
 533                 for (count = 0; count < 32 && count < act->count;
 534                      count += sizeof(int))
 535                         len += sprintf(page + len, " %08X",
 536                                        ((int *) (addr_t) act->cda)
 537                                        [(count>>2)]);
 538                 len += sprintf(page + len, "\n");
 539                 act++;
 540         }
 541         if (len > 0)
 542                 MESSAGE_LOG(KERN_ERR, "%s",
 543                             page + sizeof(KERN_ERR PRINTK_HEADER));
 544         free_page((unsigned long) page);
 545 }
 546
 547 /*
 548  * max_blocks is dependent on the amount of storage that is available
 549  * in the static io buffer for each device. Currently each device has
 550  * 8192 bytes (=2 pages). For 64 bit one dasd_mchunkt_t structure has
 551  * 24 bytes, the struct dasd_ccw_req has 136 bytes and each block can use
 552  * up to 16 bytes (8 for the ccw and 8 for the idal pointer). In
 553  * addition we have one define extent ccw + 16 bytes of data and a
 554  * locate record ccw for each block (stupid devices!) + 16 bytes of data.
 555  * That makes:
 556  * (8192 - 24 - 136 - 8 - 16) / 40 = 200.2 blocks at maximum.
 557  * We want to fit two into the available memory so that we can immediately
 558  * start the next request if one finishes off. That makes 100.1 blocks
 559  * for one request. Give a little safety and the result is 96.
 560  */
 561 static struct dasd_discipline dasd_fba_discipline = {
 562         .owner = THIS_MODULE,
 563         .name = "FBA ",
 564         .ebcname = "FBA ",
 565         .max_blocks = 96,
 566         .check_device = dasd_fba_check_characteristics,
 567         .do_analysis = dasd_fba_do_analysis,
 568         .fill_geometry = dasd_fba_fill_geometry,
 569         .start_IO = dasd_start_IO,
 570         .term_IO = dasd_term_IO,
 571         .handle_terminated_request = dasd_fba_handle_terminated_request,
 572         .erp_action = dasd_fba_erp_action,
 573         .erp_postaction = dasd_fba_erp_postaction,
 574         .handle_unsolicited_interrupt = dasd_fba_handle_unsolicited_interrupt,
 575         .build_cp = dasd_fba_build_cp,
 576         .free_cp = dasd_fba_free_cp,
 577         .dump_sense = dasd_fba_dump_sense,
 578         .fill_info = dasd_fba_fill_info,
 579 };
 580
 581 static int __init
 582 dasd_fba_init(void)
 583 {
 584         ASCEBC(dasd_fba_discipline.ebcname, 4);
 585         return ccw_driver_register(&dasd_fba_driver);
 586 }
 587
 588 static void __exit
 589 dasd_fba_cleanup(void)
 590 {
 591         ccw_driver_unregister(&dasd_fba_driver);
 592 }
 593
 594 module_init(dasd_fba_init);
 595 module_exit(dasd_fba_cleanup);