drivers/s390/block/dasd_eckd.c

   1 /*
   2  * File...........: linux/drivers/s390/block/dasd_eckd.c
   3  * Author(s)......: Holger Smolinski <[email protected]>
   4  *                  Horst Hummel <[email protected]>
   5  *                  Carsten Otte <[email protected]>
   6  *                  Martin Schwidefsky <[email protected]>
   7  * Bugreports.to..: <[email protected]>
   8  * Copyright IBM Corp. 1999, 2009
   9  * EMC Symmetrix ioctl Copyright EMC Corporation, 2008
  10  * Author.........: Nigel Hislop <[email protected]>
  11  */
  12
  13 #define KMSG_COMPONENT "dasd-eckd"
  14
  15 #include <linux/stddef.h>
  16 #include <linux/kernel.h>
  17 #include <linux/slab.h>
  18 #include <linux/hdreg.h>        /* HDIO_GETGEO                      */
  19 #include <linux/bio.h>
  20 #include <linux/module.h>
  21 #include <linux/init.h>
  22
  23 #include <asm/debug.h>
  24 #include <asm/idals.h>
  25 #include <asm/ebcdic.h>
  26 #include <asm/compat.h>
  27 #include <asm/io.h>
  28 #include <asm/uaccess.h>
  29 #include <asm/cio.h>
  30 #include <asm/ccwdev.h>
  31 #include <asm/itcw.h>
  32
  33 #include "dasd_int.h"
  34 #include "dasd_eckd.h"
  35 #include "../cio/chsc.h"
  36
  37
  38 #ifdef PRINTK_HEADER
  39 #undef PRINTK_HEADER
  40 #endif                          /* PRINTK_HEADER */
  41 #define PRINTK_HEADER "dasd(eckd):"
  42
  43 #define ECKD_C0(i) (i->home_bytes)
  44 #define ECKD_F(i) (i->formula)
  45 #define ECKD_F1(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f1):\
  46                     (i->factors.f_0x02.f1))
  47 #define ECKD_F2(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f2):\
  48                     (i->factors.f_0x02.f2))
  49 #define ECKD_F3(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f3):\
  50                     (i->factors.f_0x02.f3))
  51 #define ECKD_F4(i) (ECKD_F(i)==0x02?(i->factors.f_0x02.f4):0)
  52 #define ECKD_F5(i) (ECKD_F(i)==0x02?(i->factors.f_0x02.f5):0)
  53 #define ECKD_F6(i) (i->factor6)
  54 #define ECKD_F7(i) (i->factor7)
  55 #define ECKD_F8(i) (i->factor8)
  56
  57 MODULE_LICENSE("GPL");
  58
  59 static struct dasd_discipline dasd_eckd_discipline;
  60
  61 /* The ccw bus type uses this table to find devices that it sends to
  62  * dasd_eckd_probe */
  63 static struct ccw_device_id dasd_eckd_ids[] = {
  64         { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3390, 0), .driver_info = 0x1},
  65         { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3390, 0), .driver_info = 0x2},
  66         { CCW_DEVICE_DEVTYPE (0x3880, 0, 0x3390, 0), .driver_info = 0x3},
  67         { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3380, 0), .driver_info = 0x4},
  68         { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3380, 0), .driver_info = 0x5},
  69         { CCW_DEVICE_DEVTYPE (0x9343, 0, 0x9345, 0), .driver_info = 0x6},
  70         { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3390, 0), .driver_info = 0x7},
  71         { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3380, 0), .driver_info = 0x8},
  72         { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3390, 0), .driver_info = 0x9},
  73         { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3380, 0), .driver_info = 0xa},
  74         { /* end of list */ },
  75 };
  76
  77 MODULE_DEVICE_TABLE(ccw, dasd_eckd_ids);
  78
  79 static struct ccw_driver dasd_eckd_driver; /* see below */
  80
  81 #define INIT_CQR_OK 0
  82 #define INIT_CQR_UNFORMATTED 1
  83 #define INIT_CQR_ERROR 2
  84
  85
  86 /* initial attempt at a probe function. this can be simplified once
  87  * the other detection code is gone */
  88 static int
  89 dasd_eckd_probe (struct ccw_device *cdev)
  90 {
  91         int ret;
  92
  93         /* set ECKD specific ccw-device options */
  94         ret = ccw_device_set_options(cdev, CCWDEV_ALLOW_FORCE |
  95                                      CCWDEV_DO_PATHGROUP | CCWDEV_DO_MULTIPATH);
  96         if (ret) {
  97                 DBF_EVENT_DEVID(DBF_WARNING, cdev, "%s",
  98                                 "dasd_eckd_probe: could not set "
  99                                 "ccw-device options");
 100                 return ret;
 101         }
 102         ret = dasd_generic_probe(cdev, &dasd_eckd_discipline);
 103         return ret;
 104 }
 105
 106 static int
 107 dasd_eckd_set_online(struct ccw_device *cdev)
 108 {
 109         return dasd_generic_set_online(cdev, &dasd_eckd_discipline);
 110 }
 111
 112 static const int sizes_trk0[] = { 28, 148, 84 };
 113 #define LABEL_SIZE 140
 114
 115 static inline unsigned int
 116 round_up_multiple(unsigned int no, unsigned int mult)
 117 {
 118         int rem = no % mult;
 119         return (rem ? no - rem + mult : no);
 120 }
 121
 122 static inline unsigned int
 123 ceil_quot(unsigned int d1, unsigned int d2)
 124 {
 125         return (d1 + (d2 - 1)) / d2;
 126 }
 127
 128 static unsigned int
 129 recs_per_track(struct dasd_eckd_characteristics * rdc,
 130                unsigned int kl, unsigned int dl)
 131 {
 132         int dn, kn;
 133
 134         switch (rdc->dev_type) {
 135         case 0x3380:
 136                 if (kl)
 137                         return 1499 / (15 + 7 + ceil_quot(kl + 12, 32) +
 138                                        ceil_quot(dl + 12, 32));
 139                 else
 140                         return 1499 / (15 + ceil_quot(dl + 12, 32));
 141         case 0x3390:
 142                 dn = ceil_quot(dl + 6, 232) + 1;
 143                 if (kl) {
 144                         kn = ceil_quot(kl + 6, 232) + 1;
 145                         return 1729 / (10 + 9 + ceil_quot(kl + 6 * kn, 34) +
 146                                        9 + ceil_quot(dl + 6 * dn, 34));
 147                 } else
 148                         return 1729 / (10 + 9 + ceil_quot(dl + 6 * dn, 34));
 149         case 0x9345:
 150                 dn = ceil_quot(dl + 6, 232) + 1;
 151                 if (kl) {
 152                         kn = ceil_quot(kl + 6, 232) + 1;
 153                         return 1420 / (18 + 7 + ceil_quot(kl + 6 * kn, 34) +
 154                                        ceil_quot(dl + 6 * dn, 34));
 155                 } else
 156                         return 1420 / (18 + 7 + ceil_quot(dl + 6 * dn, 34));
 157         }
 158         return 0;
 159 }
 160
 161 static void set_ch_t(struct ch_t *geo, __u32 cyl, __u8 head)
 162 {
 163         geo->cyl = (__u16) cyl;
 164         geo->head = cyl >> 16;
 165         geo->head <<= 4;
 166         geo->head |= head;
 167 }
 168
 169 static int
 170 check_XRC (struct ccw1         *de_ccw,
 171            struct DE_eckd_data *data,
 172            struct dasd_device  *device)
 173 {
 174         struct dasd_eckd_private *private;
 175         int rc;
 176
 177         private = (struct dasd_eckd_private *) device->private;
 178         if (!private->rdc_data.facilities.XRC_supported)
 179                 return 0;
 180
 181         /* switch on System Time Stamp - needed for XRC Support */
 182         data->ga_extended |= 0x08; /* switch on 'Time Stamp Valid'   */
 183         data->ga_extended |= 0x02; /* switch on 'Extended Parameter' */
 184
 185         rc = get_sync_clock(&data->ep_sys_time);
 186         /* Ignore return code if sync clock is switched off. */
 187         if (rc == -ENOSYS || rc == -EACCES)
 188                 rc = 0;
 189
 190         de_ccw->count = sizeof(struct DE_eckd_data);
 191         de_ccw->flags |= CCW_FLAG_SLI;
 192         return rc;
 193 }
 194
 195 static int
 196 define_extent(struct ccw1 *ccw, struct DE_eckd_data *data, unsigned int trk,
 197               unsigned int totrk, int cmd, struct dasd_device *device)
 198 {
 199         struct dasd_eckd_private *private;
 200         u32 begcyl, endcyl;
 201         u16 heads, beghead, endhead;
 202         int rc = 0;
 203
 204         private = (struct dasd_eckd_private *) device->private;
 205
 206         ccw->cmd_code = DASD_ECKD_CCW_DEFINE_EXTENT;
 207         ccw->flags = 0;
 208         ccw->count = 16;
 209         ccw->cda = (__u32) __pa(data);
 210
 211         memset(data, 0, sizeof(struct DE_eckd_data));
 212         switch (cmd) {
 213         case DASD_ECKD_CCW_READ_HOME_ADDRESS:
 214         case DASD_ECKD_CCW_READ_RECORD_ZERO:
 215         case DASD_ECKD_CCW_READ:
 216         case DASD_ECKD_CCW_READ_MT:
 217         case DASD_ECKD_CCW_READ_CKD:
 218         case DASD_ECKD_CCW_READ_CKD_MT:
 219         case DASD_ECKD_CCW_READ_KD:
 220         case DASD_ECKD_CCW_READ_KD_MT:
 221         case DASD_ECKD_CCW_READ_COUNT:
 222                 data->mask.perm = 0x1;
 223                 data->attributes.operation = private->attrib.operation;
 224                 break;
 225         case DASD_ECKD_CCW_WRITE:
 226         case DASD_ECKD_CCW_WRITE_MT:
 227         case DASD_ECKD_CCW_WRITE_KD:
 228         case DASD_ECKD_CCW_WRITE_KD_MT:
 229                 data->mask.perm = 0x02;
 230                 data->attributes.operation = private->attrib.operation;
 231                 rc = check_XRC (ccw, data, device);
 232                 break;
 233         case DASD_ECKD_CCW_WRITE_CKD:
 234         case DASD_ECKD_CCW_WRITE_CKD_MT:
 235                 data->attributes.operation = DASD_BYPASS_CACHE;
 236                 rc = check_XRC (ccw, data, device);
 237                 break;
 238         case DASD_ECKD_CCW_ERASE:
 239         case DASD_ECKD_CCW_WRITE_HOME_ADDRESS:
 240         case DASD_ECKD_CCW_WRITE_RECORD_ZERO:
 241                 data->mask.perm = 0x3;
 242                 data->mask.auth = 0x1;
 243                 data->attributes.operation = DASD_BYPASS_CACHE;
 244                 rc = check_XRC (ccw, data, device);
 245                 break;
 246         default:
 247                 dev_err(&device->cdev->dev,
 248                         "0x%x is not a known command\n", cmd);
 249                 break;
 250         }
 251
 252         data->attributes.mode = 0x3;    /* ECKD */
 253
 254         if ((private->rdc_data.cu_type == 0x2105 ||
 255              private->rdc_data.cu_type == 0x2107 ||
 256              private->rdc_data.cu_type == 0x1750)
 257             && !(private->uses_cdl && trk < 2))
 258                 data->ga_extended |= 0x40; /* Regular Data Format Mode */
 259
 260         heads = private->rdc_data.trk_per_cyl;
 261         begcyl = trk / heads;
 262         beghead = trk % heads;
 263         endcyl = totrk / heads;
 264         endhead = totrk % heads;
 265
 266         /* check for sequential prestage - enhance cylinder range */
 267         if (data->attributes.operation == DASD_SEQ_PRESTAGE ||
 268             data->attributes.operation == DASD_SEQ_ACCESS) {
 269
 270                 if (endcyl + private->attrib.nr_cyl < private->real_cyl)
 271                         endcyl += private->attrib.nr_cyl;
 272                 else
 273                         endcyl = (private->real_cyl - 1);
 274         }
 275
 276         set_ch_t(&data->beg_ext, begcyl, beghead);
 277         set_ch_t(&data->end_ext, endcyl, endhead);
 278         return rc;
 279 }
 280
 281 static int check_XRC_on_prefix(struct PFX_eckd_data *pfxdata,
 282                                struct dasd_device  *device)
 283 {
 284         struct dasd_eckd_private *private;
 285         int rc;
 286
 287         private = (struct dasd_eckd_private *) device->private;
 288         if (!private->rdc_data.facilities.XRC_supported)
 289                 return 0;
 290
 291         /* switch on System Time Stamp - needed for XRC Support */
 292         pfxdata->define_extent.ga_extended |= 0x08; /* 'Time Stamp Valid'   */
 293         pfxdata->define_extent.ga_extended |= 0x02; /* 'Extended Parameter' */
 294         pfxdata->validity.time_stamp = 1;           /* 'Time Stamp Valid'   */
 295
 296         rc = get_sync_clock(&pfxdata->define_extent.ep_sys_time);
 297         /* Ignore return code if sync clock is switched off. */
 298         if (rc == -ENOSYS || rc == -EACCES)
 299                 rc = 0;
 300         return rc;
 301 }
 302
 303 static void fill_LRE_data(struct LRE_eckd_data *data, unsigned int trk,
 304                           unsigned int rec_on_trk, int count, int cmd,
 305                           struct dasd_device *device, unsigned int reclen,
 306                           unsigned int tlf)
 307 {
 308         struct dasd_eckd_private *private;
 309         int sector;
 310         int dn, d;
 311
 312         private = (struct dasd_eckd_private *) device->private;
 313
 314         memset(data, 0, sizeof(*data));
 315         sector = 0;
 316         if (rec_on_trk) {
 317                 switch (private->rdc_data.dev_type) {
 318                 case 0x3390:
 319                         dn = ceil_quot(reclen + 6, 232);
 320                         d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34);
 321                         sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8;
 322                         break;
 323                 case 0x3380:
 324                         d = 7 + ceil_quot(reclen + 12, 32);
 325                         sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7;
 326                         break;
 327                 }
 328         }
 329         data->sector = sector;
 330         /* note: meaning of count depends on the operation
 331          *       for record based I/O it's the number of records, but for
 332          *       track based I/O it's the number of tracks
 333          */
 334         data->count = count;
 335         switch (cmd) {
 336         case DASD_ECKD_CCW_WRITE_HOME_ADDRESS:
 337                 data->operation.orientation = 0x3;
 338                 data->operation.operation = 0x03;
 339                 break;
 340         case DASD_ECKD_CCW_READ_HOME_ADDRESS:
 341                 data->operation.orientation = 0x3;
 342                 data->operation.operation = 0x16;
 343                 break;
 344         case DASD_ECKD_CCW_WRITE_RECORD_ZERO:
 345                 data->operation.orientation = 0x1;
 346                 data->operation.operation = 0x03;
 347                 data->count++;
 348                 break;
 349         case DASD_ECKD_CCW_READ_RECORD_ZERO:
 350                 data->operation.orientation = 0x3;
 351                 data->operation.operation = 0x16;
 352                 data->count++;
 353                 break;
 354         case DASD_ECKD_CCW_WRITE:
 355         case DASD_ECKD_CCW_WRITE_MT:
 356         case DASD_ECKD_CCW_WRITE_KD:
 357         case DASD_ECKD_CCW_WRITE_KD_MT:
 358                 data->auxiliary.length_valid = 0x1;
 359                 data->length = reclen;
 360                 data->operation.operation = 0x01;
 361                 break;
 362         case DASD_ECKD_CCW_WRITE_CKD:
 363         case DASD_ECKD_CCW_WRITE_CKD_MT:
 364                 data->auxiliary.length_valid = 0x1;
 365                 data->length = reclen;
 366                 data->operation.operation = 0x03;
 367                 break;
 368         case DASD_ECKD_CCW_WRITE_TRACK_DATA:
 369                 data->auxiliary.length_valid = 0x1;
 370                 data->length = reclen;  /* not tlf, as one might think */
 371                 data->operation.operation = 0x3F;
 372                 data->extended_operation = 0x23;
 373                 break;
 374         case DASD_ECKD_CCW_READ:
 375         case DASD_ECKD_CCW_READ_MT:
 376         case DASD_ECKD_CCW_READ_KD:
 377         case DASD_ECKD_CCW_READ_KD_MT:
 378                 data->auxiliary.length_valid = 0x1;
 379                 data->length = reclen;
 380                 data->operation.operation = 0x06;
 381                 break;
 382         case DASD_ECKD_CCW_READ_CKD:
 383         case DASD_ECKD_CCW_READ_CKD_MT:
 384                 data->auxiliary.length_valid = 0x1;
 385                 data->length = reclen;
 386                 data->operation.operation = 0x16;
 387                 break;
 388         case DASD_ECKD_CCW_READ_COUNT:
 389                 data->operation.operation = 0x06;
 390                 break;
 391         case DASD_ECKD_CCW_READ_TRACK_DATA:
 392                 data->auxiliary.length_valid = 0x1;
 393                 data->length = tlf;
 394                 data->operation.operation = 0x0C;
 395                 break;
 396         case DASD_ECKD_CCW_ERASE:
 397                 data->length = reclen;
 398                 data->auxiliary.length_valid = 0x1;
 399                 data->operation.operation = 0x0b;
 400                 break;
 401         default:
 402                 DBF_DEV_EVENT(DBF_ERR, device,
 403                             "fill LRE unknown opcode 0x%x", cmd);
 404                 BUG();
 405         }
 406         set_ch_t(&data->seek_addr,
 407                  trk / private->rdc_data.trk_per_cyl,
 408                  trk % private->rdc_data.trk_per_cyl);
 409         data->search_arg.cyl = data->seek_addr.cyl;
 410         data->search_arg.head = data->seek_addr.head;
 411         data->search_arg.record = rec_on_trk;
 412 }
 413
 414 static int prefix_LRE(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata,
 415                       unsigned int trk, unsigned int totrk, int cmd,
 416                       struct dasd_device *basedev, struct dasd_device *startdev,
 417                       unsigned char format, unsigned int rec_on_trk, int count,
 418                       unsigned int blksize, unsigned int tlf)
 419 {
 420         struct dasd_eckd_private *basepriv, *startpriv;
 421         struct DE_eckd_data *dedata;
 422         struct LRE_eckd_data *lredata;
 423         u32 begcyl, endcyl;
 424         u16 heads, beghead, endhead;
 425         int rc = 0;
 426
 427         basepriv = (struct dasd_eckd_private *) basedev->private;
 428         startpriv = (struct dasd_eckd_private *) startdev->private;
 429         dedata = &pfxdata->define_extent;
 430         lredata = &pfxdata->locate_record;
 431
 432         ccw->cmd_code = DASD_ECKD_CCW_PFX;
 433         ccw->flags = 0;
 434         ccw->count = sizeof(*pfxdata);
 435         ccw->cda = (__u32) __pa(pfxdata);
 436
 437         memset(pfxdata, 0, sizeof(*pfxdata));
 438         /* prefix data */
 439         if (format > 1) {
 440                 DBF_DEV_EVENT(DBF_ERR, basedev,
 441                               "PFX LRE unknown format 0x%x", format);
 442                 BUG();
 443                 return -EINVAL;
 444         }
 445         pfxdata->format = format;
 446         pfxdata->base_address = basepriv->ned->unit_addr;
 447         pfxdata->base_lss = basepriv->ned->ID;
 448         pfxdata->validity.define_extent = 1;
 449
 450         /* private uid is kept up to date, conf_data may be outdated */
 451         if (startpriv->uid.type != UA_BASE_DEVICE) {
 452                 pfxdata->validity.verify_base = 1;
 453                 if (startpriv->uid.type == UA_HYPER_PAV_ALIAS)
 454                         pfxdata->validity.hyper_pav = 1;
 455         }
 456
 457         /* define extend data (mostly)*/
 458         switch (cmd) {
 459         case DASD_ECKD_CCW_READ_HOME_ADDRESS:
 460         case DASD_ECKD_CCW_READ_RECORD_ZERO:
 461         case DASD_ECKD_CCW_READ:
 462         case DASD_ECKD_CCW_READ_MT:
 463         case DASD_ECKD_CCW_READ_CKD:
 464         case DASD_ECKD_CCW_READ_CKD_MT:
 465         case DASD_ECKD_CCW_READ_KD:
 466         case DASD_ECKD_CCW_READ_KD_MT:
 467         case DASD_ECKD_CCW_READ_COUNT:
 468                 dedata->mask.perm = 0x1;
 469                 dedata->attributes.operation = basepriv->attrib.operation;
 470                 break;
 471         case DASD_ECKD_CCW_READ_TRACK_DATA:
 472                 dedata->mask.perm = 0x1;
 473                 dedata->attributes.operation = basepriv->attrib.operation;
 474                 dedata->blk_size = 0;
 475                 break;
 476         case DASD_ECKD_CCW_WRITE:
 477         case DASD_ECKD_CCW_WRITE_MT:
 478         case DASD_ECKD_CCW_WRITE_KD:
 479         case DASD_ECKD_CCW_WRITE_KD_MT:
 480                 dedata->mask.perm = 0x02;
 481                 dedata->attributes.operation = basepriv->attrib.operation;
 482                 rc = check_XRC_on_prefix(pfxdata, basedev);
 483                 break;
 484         case DASD_ECKD_CCW_WRITE_CKD:
 485         case DASD_ECKD_CCW_WRITE_CKD_MT:
 486                 dedata->attributes.operation = DASD_BYPASS_CACHE;
 487                 rc = check_XRC_on_prefix(pfxdata, basedev);
 488                 break;
 489         case DASD_ECKD_CCW_ERASE:
 490         case DASD_ECKD_CCW_WRITE_HOME_ADDRESS:
 491         case DASD_ECKD_CCW_WRITE_RECORD_ZERO:
 492                 dedata->mask.perm = 0x3;
 493                 dedata->mask.auth = 0x1;
 494                 dedata->attributes.operation = DASD_BYPASS_CACHE;
 495                 rc = check_XRC_on_prefix(pfxdata, basedev);
 496                 break;
 497         case DASD_ECKD_CCW_WRITE_TRACK_DATA:
 498                 dedata->mask.perm = 0x02;
 499                 dedata->attributes.operation = basepriv->attrib.operation;
 500                 dedata->blk_size = blksize;
 501                 rc = check_XRC_on_prefix(pfxdata, basedev);
 502                 break;
 503         default:
 504                 DBF_DEV_EVENT(DBF_ERR, basedev,
 505                             "PFX LRE unknown opcode 0x%x", cmd);
 506                 BUG();
 507                 return -EINVAL;
 508         }
 509
 510         dedata->attributes.mode = 0x3;  /* ECKD */
 511
 512         if ((basepriv->rdc_data.cu_type == 0x2105 ||
 513              basepriv->rdc_data.cu_type == 0x2107 ||
 514              basepriv->rdc_data.cu_type == 0x1750)
 515             && !(basepriv->uses_cdl && trk < 2))
 516                 dedata->ga_extended |= 0x40; /* Regular Data Format Mode */
 517
 518         heads = basepriv->rdc_data.trk_per_cyl;
 519         begcyl = trk / heads;
 520         beghead = trk % heads;
 521         endcyl = totrk / heads;
 522         endhead = totrk % heads;
 523
 524         /* check for sequential prestage - enhance cylinder range */
 525         if (dedata->attributes.operation == DASD_SEQ_PRESTAGE ||
 526             dedata->attributes.operation == DASD_SEQ_ACCESS) {
 527
 528                 if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl)
 529                         endcyl += basepriv->attrib.nr_cyl;
 530                 else
 531                         endcyl = (basepriv->real_cyl - 1);
 532         }
 533
 534         set_ch_t(&dedata->beg_ext, begcyl, beghead);
 535         set_ch_t(&dedata->end_ext, endcyl, endhead);
 536
 537         if (format == 1) {
 538                 fill_LRE_data(lredata, trk, rec_on_trk, count, cmd,
 539                               basedev, blksize, tlf);
 540         }
 541
 542         return rc;
 543 }
 544
 545 static int prefix(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata,
 546                   unsigned int trk, unsigned int totrk, int cmd,
 547                   struct dasd_device *basedev, struct dasd_device *startdev)
 548 {
 549         return prefix_LRE(ccw, pfxdata, trk, totrk, cmd, basedev, startdev,
 550                           0, 0, 0, 0, 0);
 551 }
 552
 553 static void
 554 locate_record(struct ccw1 *ccw, struct LO_eckd_data *data, unsigned int trk,
 555               unsigned int rec_on_trk, int no_rec, int cmd,
 556               struct dasd_device * device, int reclen)
 557 {
 558         struct dasd_eckd_private *private;
 559         int sector;
 560         int dn, d;
 561
 562         private = (struct dasd_eckd_private *) device->private;
 563
 564         DBF_DEV_EVENT(DBF_INFO, device,
 565                   "Locate: trk %d, rec %d, no_rec %d, cmd %d, reclen %d",
 566                   trk, rec_on_trk, no_rec, cmd, reclen);
 567
 568         ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD;
 569         ccw->flags = 0;
 570         ccw->count = 16;
 571         ccw->cda = (__u32) __pa(data);
 572
 573         memset(data, 0, sizeof(struct LO_eckd_data));
 574         sector = 0;
 575         if (rec_on_trk) {
 576                 switch (private->rdc_data.dev_type) {
 577                 case 0x3390:
 578                         dn = ceil_quot(reclen + 6, 232);
 579                         d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34);
 580                         sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8;
 581                         break;
 582                 case 0x3380:
 583                         d = 7 + ceil_quot(reclen + 12, 32);
 584                         sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7;
 585                         break;
 586                 }
 587         }
 588         data->sector = sector;
 589         data->count = no_rec;
 590         switch (cmd) {
 591         case DASD_ECKD_CCW_WRITE_HOME_ADDRESS:
 592                 data->operation.orientation = 0x3;
 593                 data->operation.operation = 0x03;
 594                 break;
 595         case DASD_ECKD_CCW_READ_HOME_ADDRESS:
 596                 data->operation.orientation = 0x3;
 597                 data->operation.operation = 0x16;
 598                 break;
 599         case DASD_ECKD_CCW_WRITE_RECORD_ZERO:
 600                 data->operation.orientation = 0x1;
 601                 data->operation.operation = 0x03;
 602                 data->count++;
 603                 break;
 604         case DASD_ECKD_CCW_READ_RECORD_ZERO:
 605                 data->operation.orientation = 0x3;
 606                 data->operation.operation = 0x16;
 607                 data->count++;
 608                 break;
 609         case DASD_ECKD_CCW_WRITE:
 610         case DASD_ECKD_CCW_WRITE_MT:
 611         case DASD_ECKD_CCW_WRITE_KD:
 612         case DASD_ECKD_CCW_WRITE_KD_MT:
 613                 data->auxiliary.last_bytes_used = 0x1;
 614                 data->length = reclen;
 615                 data->operation.operation = 0x01;
 616                 break;
 617         case DASD_ECKD_CCW_WRITE_CKD:
 618         case DASD_ECKD_CCW_WRITE_CKD_MT:
 619                 data->auxiliary.last_bytes_used = 0x1;
 620                 data->length = reclen;
 621                 data->operation.operation = 0x03;
 622                 break;
 623         case DASD_ECKD_CCW_READ:
 624         case DASD_ECKD_CCW_READ_MT:
 625         case DASD_ECKD_CCW_READ_KD:
 626         case DASD_ECKD_CCW_READ_KD_MT:
 627                 data->auxiliary.last_bytes_used = 0x1;
 628                 data->length = reclen;
 629                 data->operation.operation = 0x06;
 630                 break;
 631         case DASD_ECKD_CCW_READ_CKD:
 632         case DASD_ECKD_CCW_READ_CKD_MT:
 633                 data->auxiliary.last_bytes_used = 0x1;
 634                 data->length = reclen;
 635                 data->operation.operation = 0x16;
 636                 break;
 637         case DASD_ECKD_CCW_READ_COUNT:
 638                 data->operation.operation = 0x06;
 639                 break;
 640         case DASD_ECKD_CCW_ERASE:
 641                 data->length = reclen;
 642                 data->auxiliary.last_bytes_used = 0x1;
 643                 data->operation.operation = 0x0b;
 644                 break;
 645         default:
 646                 DBF_DEV_EVENT(DBF_ERR, device, "unknown locate record "
 647                               "opcode 0x%x", cmd);
 648         }
 649         set_ch_t(&data->seek_addr,
 650                  trk / private->rdc_data.trk_per_cyl,
 651                  trk % private->rdc_data.trk_per_cyl);
 652         data->search_arg.cyl = data->seek_addr.cyl;
 653         data->search_arg.head = data->seek_addr.head;
 654         data->search_arg.record = rec_on_trk;
 655 }
 656
 657 /*
 658  * Returns 1 if the block is one of the special blocks that needs
 659  * to get read/written with the KD variant of the command.
 660  * That is DASD_ECKD_READ_KD_MT instead of DASD_ECKD_READ_MT and
 661  * DASD_ECKD_WRITE_KD_MT instead of DASD_ECKD_WRITE_MT.
 662  * Luckily the KD variants differ only by one bit (0x08) from the
 663  * normal variant. So don't wonder about code like:
 664  * if (dasd_eckd_cdl_special(blk_per_trk, recid))
 665  *         ccw->cmd_code |= 0x8;
 666  */
 667 static inline int
 668 dasd_eckd_cdl_special(int blk_per_trk, int recid)
 669 {
 670         if (recid < 3)
 671                 return 1;
 672         if (recid < blk_per_trk)
 673                 return 0;
 674         if (recid < 2 * blk_per_trk)
 675                 return 1;
 676         return 0;
 677 }
 678
 679 /*
 680  * Returns the record size for the special blocks of the cdl format.
 681  * Only returns something useful if dasd_eckd_cdl_special is true
 682  * for the recid.
 683  */
 684 static inline int
 685 dasd_eckd_cdl_reclen(int recid)
 686 {
 687         if (recid < 3)
 688                 return sizes_trk0[recid];
 689         return LABEL_SIZE;
 690 }
 691
 692 /*
 693  * Generate device unique id that specifies the physical device.
 694  */
 695 static int dasd_eckd_generate_uid(struct dasd_device *device)
 696 {
 697         struct dasd_eckd_private *private;
 698         struct dasd_uid *uid;
 699         int count;
 700         unsigned long flags;
 701
 702         private = (struct dasd_eckd_private *) device->private;
 703         if (!private)
 704                 return -ENODEV;
 705         if (!private->ned || !private->gneq)
 706                 return -ENODEV;
 707         uid = &private->uid;
 708         spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
 709         memset(uid, 0, sizeof(struct dasd_uid));
 710         memcpy(uid->vendor, private->ned->HDA_manufacturer,
 711                sizeof(uid->vendor) - 1);
 712         EBCASC(uid->vendor, sizeof(uid->vendor) - 1);
 713         memcpy(uid->serial, private->ned->HDA_location,
 714                sizeof(uid->serial) - 1);
 715         EBCASC(uid->serial, sizeof(uid->serial) - 1);
 716         uid->ssid = private->gneq->subsystemID;
 717         uid->real_unit_addr = private->ned->unit_addr;
 718         if (private->sneq) {
 719                 uid->type = private->sneq->sua_flags;
 720                 if (uid->type == UA_BASE_PAV_ALIAS)
 721                         uid->base_unit_addr = private->sneq->base_unit_addr;
 722         } else {
 723                 uid->type = UA_BASE_DEVICE;
 724         }
 725         if (private->vdsneq) {
 726                 for (count = 0; count < 16; count++) {
 727                         sprintf(uid->vduit+2*count, "%02x",
 728                                 private->vdsneq->uit[count]);
 729                 }
 730         }
 731         spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
 732         return 0;
 733 }
 734
 735 static int dasd_eckd_get_uid(struct dasd_device *device, struct dasd_uid *uid)
 736 {
 737         struct dasd_eckd_private *private;
 738         unsigned long flags;
 739
 740         if (device->private) {
 741                 private = (struct dasd_eckd_private *)device->private;
 742                 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
 743                 *uid = private->uid;
 744                 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
 745                 return 0;
 746         }
 747         return -EINVAL;
 748 }
 749
 750 static struct dasd_ccw_req *dasd_eckd_build_rcd_lpm(struct dasd_device *device,
 751                                                     void *rcd_buffer,
 752                                                     struct ciw *ciw, __u8 lpm)
 753 {
 754         struct dasd_ccw_req *cqr;
 755         struct ccw1 *ccw;
 756
 757         cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* RCD */, ciw->count,
 758                                    device);
 759
 760         if (IS_ERR(cqr)) {
 761                 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
 762                               "Could not allocate RCD request");
 763                 return cqr;
 764         }
 765
 766         ccw = cqr->cpaddr;
 767         ccw->cmd_code = ciw->cmd;
 768         ccw->cda = (__u32)(addr_t)rcd_buffer;
 769         ccw->count = ciw->count;
 770
 771         cqr->startdev = device;
 772         cqr->memdev = device;
 773         cqr->block = NULL;
 774         cqr->expires = 10*HZ;
 775         cqr->lpm = lpm;
 776         cqr->retries = 256;
 777         cqr->buildclk = get_clock();
 778         cqr->status = DASD_CQR_FILLED;
 779         return cqr;
 780 }
 781
 782 static int dasd_eckd_read_conf_lpm(struct dasd_device *device,
 783                                    void **rcd_buffer,
 784                                    int *rcd_buffer_size, __u8 lpm)
 785 {
 786         struct ciw *ciw;
 787         char *rcd_buf = NULL;
 788         int ret;
 789         struct dasd_ccw_req *cqr;
 790
 791         /*
 792          * scan for RCD command in extended SenseID data
 793          */
 794         ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD);
 795         if (!ciw || ciw->cmd == 0) {
 796                 ret = -EOPNOTSUPP;
 797                 goto out_error;
 798         }
 799         rcd_buf = kzalloc(ciw->count, GFP_KERNEL | GFP_DMA);
 800         if (!rcd_buf) {
 801                 ret = -ENOMEM;
 802                 goto out_error;
 803         }
 804
 805         /*
 806          * buffer has to start with EBCDIC "V1.0" to show
 807          * support for virtual device SNEQ
 808          */
 809         rcd_buf[0] = 0xE5;
 810         rcd_buf[1] = 0xF1;
 811         rcd_buf[2] = 0x4B;
 812         rcd_buf[3] = 0xF0;
 813         cqr = dasd_eckd_build_rcd_lpm(device, rcd_buf, ciw, lpm);
 814         if (IS_ERR(cqr)) {
 815                 ret =  PTR_ERR(cqr);
 816                 goto out_error;
 817         }
 818         ret = dasd_sleep_on(cqr);
 819         /*
 820          * on success we update the user input parms
 821          */
 822         dasd_sfree_request(cqr, cqr->memdev);
 823         if (ret)
 824                 goto out_error;
 825
 826         *rcd_buffer_size = ciw->count;
 827         *rcd_buffer = rcd_buf;
 828         return 0;
 829 out_error:
 830         kfree(rcd_buf);
 831         *rcd_buffer = NULL;
 832         *rcd_buffer_size = 0;
 833         return ret;
 834 }
 835
 836 static int dasd_eckd_identify_conf_parts(struct dasd_eckd_private *private)
 837 {
 838
 839         struct dasd_sneq *sneq;
 840         int i, count;
 841
 842         private->ned = NULL;
 843         private->sneq = NULL;
 844         private->vdsneq = NULL;
 845         private->gneq = NULL;
 846         count = private->conf_len / sizeof(struct dasd_sneq);
 847         sneq = (struct dasd_sneq *)private->conf_data;
 848         for (i = 0; i < count; ++i) {
 849                 if (sneq->flags.identifier == 1 && sneq->format == 1)
 850                         private->sneq = sneq;
 851                 else if (sneq->flags.identifier == 1 && sneq->format == 4)
 852                         private->vdsneq = (struct vd_sneq *)sneq;
 853                 else if (sneq->flags.identifier == 2)
 854                         private->gneq = (struct dasd_gneq *)sneq;
 855                 else if (sneq->flags.identifier == 3 && sneq->res1 == 1)
 856                         private->ned = (struct dasd_ned *)sneq;
 857                 sneq++;
 858         }
 859         if (!private->ned || !private->gneq) {
 860                 private->ned = NULL;
 861                 private->sneq = NULL;
 862                 private->vdsneq = NULL;
 863                 private->gneq = NULL;
 864                 return -EINVAL;
 865         }
 866         return 0;
 867
 868 };
 869
 870 static unsigned char dasd_eckd_path_access(void *conf_data, int conf_len)
 871 {
 872         struct dasd_gneq *gneq;
 873         int i, count, found;
 874
 875         count = conf_len / sizeof(*gneq);
 876         gneq = (struct dasd_gneq *)conf_data;
 877         found = 0;
 878         for (i = 0; i < count; ++i) {
 879                 if (gneq->flags.identifier == 2) {
 880                         found = 1;
 881                         break;
 882                 }
 883                 gneq++;
 884         }
 885         if (found)
 886                 return ((char *)gneq)[18] & 0x07;
 887         else
 888                 return 0;
 889 }
 890
 891 static int dasd_eckd_read_conf(struct dasd_device *device)
 892 {
 893         void *conf_data;
 894         int conf_len, conf_data_saved;
 895         int rc;
 896         __u8 lpm;
 897         struct dasd_eckd_private *private;
 898         struct dasd_eckd_path *path_data;
 899
 900         private = (struct dasd_eckd_private *) device->private;
 901         path_data = (struct dasd_eckd_path *) &private->path_data;
 902         path_data->opm = ccw_device_get_path_mask(device->cdev);
 903         lpm = 0x80;
 904         conf_data_saved = 0;
 905         /* get configuration data per operational path */
 906         for (lpm = 0x80; lpm; lpm>>= 1) {
 907                 if (lpm & path_data->opm){
 908                         rc = dasd_eckd_read_conf_lpm(device, &conf_data,
 909                                                      &conf_len, lpm);
 910                         if (rc && rc != -EOPNOTSUPP) {  /* -EOPNOTSUPP is ok */
 911                                 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
 912                                           "Read configuration data returned "
 913                                           "error %d", rc);
 914                                 return rc;
 915                         }
 916                         if (conf_data == NULL) {
 917                                 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
 918                                                 "No configuration data "
 919                                                 "retrieved");
 920                                 continue;       /* no error */
 921                         }
 922                         /* save first valid configuration data */
 923                         if (!conf_data_saved) {
 924                                 kfree(private->conf_data);
 925                                 private->conf_data = conf_data;
 926                                 private->conf_len = conf_len;
 927                                 if (dasd_eckd_identify_conf_parts(private)) {
 928                                         private->conf_data = NULL;
 929                                         private->conf_len = 0;
 930                                         kfree(conf_data);
 931                                         continue;
 932                                 }
 933                                 conf_data_saved++;
 934                         }
 935                         switch (dasd_eckd_path_access(conf_data, conf_len)) {
 936                         case 0x02:
 937                                 path_data->npm |= lpm;
 938                                 break;
 939                         case 0x03:
 940                                 path_data->ppm |= lpm;
 941                                 break;
 942                         }
 943                         if (conf_data != private->conf_data)
 944                                 kfree(conf_data);
 945                 }
 946         }
 947         return 0;
 948 }
 949
 950 static int dasd_eckd_read_features(struct dasd_device *device)
 951 {
 952         struct dasd_psf_prssd_data *prssdp;
 953         struct dasd_rssd_features *features;
 954         struct dasd_ccw_req *cqr;
 955         struct ccw1 *ccw;
 956         int rc;
 957         struct dasd_eckd_private *private;
 958
 959         private = (struct dasd_eckd_private *) device->private;
 960         memset(&private->features, 0, sizeof(struct dasd_rssd_features));
 961         cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */,
 962                                    (sizeof(struct dasd_psf_prssd_data) +
 963                                     sizeof(struct dasd_rssd_features)),
 964                                    device);
 965         if (IS_ERR(cqr)) {
 966                 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", "Could not "
 967                                 "allocate initialization request");
 968                 return PTR_ERR(cqr);
 969         }
 970         cqr->startdev = device;
 971         cqr->memdev = device;
 972         cqr->block = NULL;
 973         cqr->retries = 256;
 974         cqr->expires = 10 * HZ;
 975
 976         /* Prepare for Read Subsystem Data */
 977         prssdp = (struct dasd_psf_prssd_data *) cqr->data;
 978         memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data));
 979         prssdp->order = PSF_ORDER_PRSSD;
 980         prssdp->suborder = 0x41;        /* Read Feature Codes */
 981         /* all other bytes of prssdp must be zero */
 982
 983         ccw = cqr->cpaddr;
 984         ccw->cmd_code = DASD_ECKD_CCW_PSF;
 985         ccw->count = sizeof(struct dasd_psf_prssd_data);
 986         ccw->flags |= CCW_FLAG_CC;
 987         ccw->cda = (__u32)(addr_t) prssdp;
 988
 989         /* Read Subsystem Data - feature codes */
 990         features = (struct dasd_rssd_features *) (prssdp + 1);
 991         memset(features, 0, sizeof(struct dasd_rssd_features));
 992
 993         ccw++;
 994         ccw->cmd_code = DASD_ECKD_CCW_RSSD;
 995         ccw->count = sizeof(struct dasd_rssd_features);
 996         ccw->cda = (__u32)(addr_t) features;
 997
 998         cqr->buildclk = get_clock();
 999         cqr->status = DASD_CQR_FILLED;
1000         rc = dasd_sleep_on(cqr);
1001         if (rc == 0) {
1002                 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
1003                 features = (struct dasd_rssd_features *) (prssdp + 1);
1004                 memcpy(&private->features, features,
1005                        sizeof(struct dasd_rssd_features));
1006         } else
1007                 dev_warn(&device->cdev->dev, "Reading device feature codes"
1008                          " failed with rc=%d\n", rc);
1009         dasd_sfree_request(cqr, cqr->memdev);
1010         return rc;
1011 }
1012
1013
1014 /*
1015  * Build CP for Perform Subsystem Function - SSC.
1016  */
1017 static struct dasd_ccw_req *dasd_eckd_build_psf_ssc(struct dasd_device *device,
1018                                                     int enable_pav)
1019 {
1020         struct dasd_ccw_req *cqr;
1021         struct dasd_psf_ssc_data *psf_ssc_data;
1022         struct ccw1 *ccw;
1023
1024         cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ ,
1025                                   sizeof(struct dasd_psf_ssc_data),
1026                                   device);
1027
1028         if (IS_ERR(cqr)) {
1029                 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1030                            "Could not allocate PSF-SSC request");
1031                 return cqr;
1032         }
1033         psf_ssc_data = (struct dasd_psf_ssc_data *)cqr->data;
1034         psf_ssc_data->order = PSF_ORDER_SSC;
1035         psf_ssc_data->suborder = 0xc0;
1036         if (enable_pav) {
1037                 psf_ssc_data->suborder |= 0x08;
1038                 psf_ssc_data->reserved[0] = 0x88;
1039         }
1040         ccw = cqr->cpaddr;
1041         ccw->cmd_code = DASD_ECKD_CCW_PSF;
1042         ccw->cda = (__u32)(addr_t)psf_ssc_data;
1043         ccw->count = 66;
1044
1045         cqr->startdev = device;
1046         cqr->memdev = device;
1047         cqr->block = NULL;
1048         cqr->retries = 256;
1049         cqr->expires = 10*HZ;
1050         cqr->buildclk = get_clock();
1051         cqr->status = DASD_CQR_FILLED;
1052         return cqr;
1053 }
1054
1055 /*
1056  * Perform Subsystem Function.
1057  * It is necessary to trigger CIO for channel revalidation since this
1058  * call might change behaviour of DASD devices.
1059  */
1060 static int
1061 dasd_eckd_psf_ssc(struct dasd_device *device, int enable_pav)
1062 {
1063         struct dasd_ccw_req *cqr;
1064         int rc;
1065
1066         cqr = dasd_eckd_build_psf_ssc(device, enable_pav);
1067         if (IS_ERR(cqr))
1068                 return PTR_ERR(cqr);
1069
1070         rc = dasd_sleep_on(cqr);
1071         if (!rc)
1072                 /* trigger CIO to reprobe devices */
1073                 css_schedule_reprobe();
1074         dasd_sfree_request(cqr, cqr->memdev);
1075         return rc;
1076 }
1077
1078 /*
1079  * Valide storage server of current device.
1080  */
1081 static void dasd_eckd_validate_server(struct dasd_device *device)
1082 {
1083         int rc;
1084         struct dasd_eckd_private *private;
1085         int enable_pav;
1086
1087         if (dasd_nopav || MACHINE_IS_VM)
1088                 enable_pav = 0;
1089         else
1090                 enable_pav = 1;
1091         rc = dasd_eckd_psf_ssc(device, enable_pav);
1092
1093         /* may be requested feature is not available on server,
1094          * therefore just report error and go ahead */
1095         private = (struct dasd_eckd_private *) device->private;
1096         DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "PSF-SSC for SSID %04x "
1097                         "returned rc=%d", private->uid.ssid, rc);
1098 }
1099
1100 /*
1101  * Check device characteristics.
1102  * If the device is accessible using ECKD discipline, the device is enabled.
1103  */
1104 static int
1105 dasd_eckd_check_characteristics(struct dasd_device *device)
1106 {
1107         struct dasd_eckd_private *private;
1108         struct dasd_block *block;
1109         struct dasd_uid temp_uid;
1110         int is_known, rc;
1111         int readonly;
1112
1113         if (!ccw_device_is_pathgroup(device->cdev)) {
1114                 dev_warn(&device->cdev->dev,
1115                          "A channel path group could not be established\n");
1116                 return -EIO;
1117         }
1118         if (!ccw_device_is_multipath(device->cdev)) {
1119                 dev_info(&device->cdev->dev,
1120                          "The DASD is not operating in multipath mode\n");
1121         }
1122         private = (struct dasd_eckd_private *) device->private;
1123         if (!private) {
1124                 private = kzalloc(sizeof(*private), GFP_KERNEL | GFP_DMA);
1125                 if (!private) {
1126                         dev_warn(&device->cdev->dev,
1127                                  "Allocating memory for private DASD data "
1128                                  "failed\n");
1129                         return -ENOMEM;
1130                 }
1131                 device->private = (void *) private;
1132         } else {
1133                 memset(private, 0, sizeof(*private));
1134         }
1135         /* Invalidate status of initial analysis. */
1136         private->init_cqr_status = -1;
1137         /* Set default cache operations. */
1138         private->attrib.operation = DASD_NORMAL_CACHE;
1139         private->attrib.nr_cyl = 0;
1140
1141         /* Read Configuration Data */
1142         rc = dasd_eckd_read_conf(device);
1143         if (rc)
1144                 goto out_err1;
1145
1146         /* Generate device unique id */
1147         rc = dasd_eckd_generate_uid(device);
1148         if (rc)
1149                 goto out_err1;
1150
1151         dasd_eckd_get_uid(device, &temp_uid);
1152         if (temp_uid.type == UA_BASE_DEVICE) {
1153                 block = dasd_alloc_block();
1154                 if (IS_ERR(block)) {
1155                         DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
1156                                         "could not allocate dasd "
1157                                         "block structure");
1158                         rc = PTR_ERR(block);
1159                         goto out_err1;
1160                 }
1161                 device->block = block;
1162                 block->base = device;
1163         }
1164
1165         /* register lcu with alias handling, enable PAV if this is a new lcu */
1166         is_known = dasd_alias_make_device_known_to_lcu(device);
1167         if (is_known < 0) {
1168                 rc = is_known;
1169                 goto out_err2;
1170         }
1171         /*
1172          * dasd_eckd_vaildate_server is done on the first device that
1173          * is found for an LCU. All later other devices have to wait
1174          * for it, so they will read the correct feature codes.
1175          */
1176         if (!is_known) {
1177                 dasd_eckd_validate_server(device);
1178                 dasd_alias_lcu_setup_complete(device);
1179         } else
1180                 dasd_alias_wait_for_lcu_setup(device);
1181
1182         /* device may report different configuration data after LCU setup */
1183         rc = dasd_eckd_read_conf(device);
1184         if (rc)
1185                 goto out_err3;
1186
1187         /* Read Feature Codes */
1188         dasd_eckd_read_features(device);
1189
1190         /* Read Device Characteristics */
1191         rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC,
1192                                          &private->rdc_data, 64);
1193         if (rc) {
1194                 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
1195                                 "Read device characteristic failed, rc=%d", rc);
1196                 goto out_err3;
1197         }
1198         /* find the vaild cylinder size */
1199         if (private->rdc_data.no_cyl == LV_COMPAT_CYL &&
1200             private->rdc_data.long_no_cyl)
1201                 private->real_cyl = private->rdc_data.long_no_cyl;
1202         else
1203                 private->real_cyl = private->rdc_data.no_cyl;
1204
1205         readonly = dasd_device_is_ro(device);
1206         if (readonly)
1207                 set_bit(DASD_FLAG_DEVICE_RO, &device->flags);
1208
1209         dev_info(&device->cdev->dev, "New DASD %04X/%02X (CU %04X/%02X) "
1210                  "with %d cylinders, %d heads, %d sectors%s\n",
1211                  private->rdc_data.dev_type,
1212                  private->rdc_data.dev_model,
1213                  private->rdc_data.cu_type,
1214                  private->rdc_data.cu_model.model,
1215                  private->real_cyl,
1216                  private->rdc_data.trk_per_cyl,
1217                  private->rdc_data.sec_per_trk,
1218                  readonly ? ", read-only device" : "");
1219         return 0;
1220
1221 out_err3:
1222         dasd_alias_disconnect_device_from_lcu(device);
1223 out_err2:
1224         dasd_free_block(device->block);
1225         device->block = NULL;
1226 out_err1:
1227         kfree(private->conf_data);
1228         kfree(device->private);
1229         device->private = NULL;
1230         return rc;
1231 }
1232
1233 static void dasd_eckd_uncheck_device(struct dasd_device *device)
1234 {
1235         struct dasd_eckd_private *private;
1236
1237         private = (struct dasd_eckd_private *) device->private;
1238         dasd_alias_disconnect_device_from_lcu(device);
1239         private->ned = NULL;
1240         private->sneq = NULL;
1241         private->vdsneq = NULL;
1242         private->gneq = NULL;
1243         private->conf_len = 0;
1244         kfree(private->conf_data);
1245         private->conf_data = NULL;
1246 }
1247
1248 static struct dasd_ccw_req *
1249 dasd_eckd_analysis_ccw(struct dasd_device *device)
1250 {
1251         struct dasd_eckd_private *private;
1252         struct eckd_count *count_data;
1253         struct LO_eckd_data *LO_data;
1254         struct dasd_ccw_req *cqr;
1255         struct ccw1 *ccw;
1256         int cplength, datasize;
1257         int i;
1258
1259         private = (struct dasd_eckd_private *) device->private;
1260
1261         cplength = 8;
1262         datasize = sizeof(struct DE_eckd_data) + 2*sizeof(struct LO_eckd_data);
1263         cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, device);
1264         if (IS_ERR(cqr))
1265                 return cqr;
1266         ccw = cqr->cpaddr;
1267         /* Define extent for the first 3 tracks. */
1268         define_extent(ccw++, cqr->data, 0, 2,
1269                       DASD_ECKD_CCW_READ_COUNT, device);
1270         LO_data = cqr->data + sizeof(struct DE_eckd_data);
1271         /* Locate record for the first 4 records on track 0. */
1272         ccw[-1].flags |= CCW_FLAG_CC;
1273         locate_record(ccw++, LO_data++, 0, 0, 4,
1274                       DASD_ECKD_CCW_READ_COUNT, device, 0);
1275
1276         count_data = private->count_area;
1277         for (i = 0; i < 4; i++) {
1278                 ccw[-1].flags |= CCW_FLAG_CC;
1279                 ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT;
1280                 ccw->flags = 0;
1281                 ccw->count = 8;
1282                 ccw->cda = (__u32)(addr_t) count_data;
1283                 ccw++;
1284                 count_data++;
1285         }
1286
1287         /* Locate record for the first record on track 2. */
1288         ccw[-1].flags |= CCW_FLAG_CC;
1289         locate_record(ccw++, LO_data++, 2, 0, 1,
1290                       DASD_ECKD_CCW_READ_COUNT, device, 0);
1291         /* Read count ccw. */
1292         ccw[-1].flags |= CCW_FLAG_CC;
1293         ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT;
1294         ccw->flags = 0;
1295         ccw->count = 8;
1296         ccw->cda = (__u32)(addr_t) count_data;
1297
1298         cqr->block = NULL;
1299         cqr->startdev = device;
1300         cqr->memdev = device;
1301         cqr->retries = 255;
1302         cqr->buildclk = get_clock();
1303         cqr->status = DASD_CQR_FILLED;
1304         return cqr;
1305 }
1306
1307 /* differentiate between 'no record found' and any other error */
1308 static int dasd_eckd_analysis_evaluation(struct dasd_ccw_req *init_cqr)
1309 {
1310         char *sense;
1311         if (init_cqr->status == DASD_CQR_DONE)
1312                 return INIT_CQR_OK;
1313         else if (init_cqr->status == DASD_CQR_NEED_ERP ||
1314                  init_cqr->status == DASD_CQR_FAILED) {
1315                 sense = dasd_get_sense(&init_cqr->irb);
1316                 if (sense && (sense[1] & SNS1_NO_REC_FOUND))
1317                         return INIT_CQR_UNFORMATTED;
1318                 else
1319                         return INIT_CQR_ERROR;
1320         } else
1321                 return INIT_CQR_ERROR;
1322 }
1323
1324 /*
1325  * This is the callback function for the init_analysis cqr. It saves
1326  * the status of the initial analysis ccw before it frees it and kicks
1327  * the device to continue the startup sequence. This will call
1328  * dasd_eckd_do_analysis again (if the devices has not been marked
1329  * for deletion in the meantime).
1330  */
1331 static void dasd_eckd_analysis_callback(struct dasd_ccw_req *init_cqr,
1332                                         void *data)
1333 {
1334         struct dasd_eckd_private *private;
1335         struct dasd_device *device;
1336
1337         device = init_cqr->startdev;
1338         private = (struct dasd_eckd_private *) device->private;
1339         private->init_cqr_status = dasd_eckd_analysis_evaluation(init_cqr);
1340         dasd_sfree_request(init_cqr, device);
1341         dasd_kick_device(device);
1342 }
1343
1344 static int dasd_eckd_start_analysis(struct dasd_block *block)
1345 {
1346         struct dasd_eckd_private *private;
1347         struct dasd_ccw_req *init_cqr;
1348
1349         private = (struct dasd_eckd_private *) block->base->private;
1350         init_cqr = dasd_eckd_analysis_ccw(block->base);
1351         if (IS_ERR(init_cqr))
1352                 return PTR_ERR(init_cqr);
1353         init_cqr->callback = dasd_eckd_analysis_callback;
1354         init_cqr->callback_data = NULL;
1355         init_cqr->expires = 5*HZ;
1356         /* first try without ERP, so we can later handle unformatted
1357          * devices as special case
1358          */
1359         clear_bit(DASD_CQR_FLAGS_USE_ERP, &init_cqr->flags);
1360         init_cqr->retries = 0;
1361         dasd_add_request_head(init_cqr);
1362         return -EAGAIN;
1363 }
1364
1365 static int dasd_eckd_end_analysis(struct dasd_block *block)
1366 {
1367         struct dasd_device *device;
1368         struct dasd_eckd_private *private;
1369         struct eckd_count *count_area;
1370         unsigned int sb, blk_per_trk;
1371         int status, i;
1372         struct dasd_ccw_req *init_cqr;
1373
1374         device = block->base;
1375         private = (struct dasd_eckd_private *) device->private;
1376         status = private->init_cqr_status;
1377         private->init_cqr_status = -1;
1378         if (status == INIT_CQR_ERROR) {
1379                 /* try again, this time with full ERP */
1380                 init_cqr = dasd_eckd_analysis_ccw(device);
1381                 dasd_sleep_on(init_cqr);
1382                 status = dasd_eckd_analysis_evaluation(init_cqr);
1383                 dasd_sfree_request(init_cqr, device);
1384         }
1385
1386         if (status == INIT_CQR_UNFORMATTED) {
1387                 dev_warn(&device->cdev->dev, "The DASD is not formatted\n");
1388                 return -EMEDIUMTYPE;
1389         } else if (status == INIT_CQR_ERROR) {
1390                 dev_err(&device->cdev->dev,
1391                         "Detecting the DASD disk layout failed because "
1392                         "of an I/O error\n");
1393                 return -EIO;
1394         }
1395
1396         private->uses_cdl = 1;
1397         /* Check Track 0 for Compatible Disk Layout */
1398         count_area = NULL;
1399         for (i = 0; i < 3; i++) {
1400                 if (private->count_area[i].kl != 4 ||
1401                     private->count_area[i].dl != dasd_eckd_cdl_reclen(i) - 4) {
1402                         private->uses_cdl = 0;
1403                         break;
1404                 }
1405         }
1406         if (i == 3)
1407                 count_area = &private->count_area[4];
1408
1409         if (private->uses_cdl == 0) {
1410                 for (i = 0; i < 5; i++) {
1411                         if ((private->count_area[i].kl != 0) ||
1412                             (private->count_area[i].dl !=
1413                              private->count_area[0].dl))
1414                                 break;
1415                 }
1416                 if (i == 5)
1417                         count_area = &private->count_area[0];
1418         } else {
1419                 if (private->count_area[3].record == 1)
1420                         dev_warn(&device->cdev->dev,
1421                                  "Track 0 has no records following the VTOC\n");
1422         }
1423         if (count_area != NULL && count_area->kl == 0) {
1424                 /* we found notthing violating our disk layout */
1425                 if (dasd_check_blocksize(count_area->dl) == 0)
1426                         block->bp_block = count_area->dl;
1427         }
1428         if (block->bp_block == 0) {
1429                 dev_warn(&device->cdev->dev,
1430                          "The disk layout of the DASD is not supported\n");
1431                 return -EMEDIUMTYPE;
1432         }
1433         block->s2b_shift = 0;   /* bits to shift 512 to get a block */
1434         for (sb = 512; sb < block->bp_block; sb = sb << 1)
1435                 block->s2b_shift++;
1436
1437         blk_per_trk = recs_per_track(&private->rdc_data, 0, block->bp_block);
1438         block->blocks = (private->real_cyl *
1439                           private->rdc_data.trk_per_cyl *
1440                           blk_per_trk);
1441
1442         dev_info(&device->cdev->dev,
1443                  "DASD with %d KB/block, %d KB total size, %d KB/track, "
1444                  "%s\n", (block->bp_block >> 10),
1445                  ((private->real_cyl *
1446                    private->rdc_data.trk_per_cyl *
1447                    blk_per_trk * (block->bp_block >> 9)) >> 1),
1448                  ((blk_per_trk * block->bp_block) >> 10),
1449                  private->uses_cdl ?
1450                  "compatible disk layout" : "linux disk layout");
1451
1452         return 0;
1453 }
1454
1455 static int dasd_eckd_do_analysis(struct dasd_block *block)
1456 {
1457         struct dasd_eckd_private *private;
1458
1459         private = (struct dasd_eckd_private *) block->base->private;
1460         if (private->init_cqr_status < 0)
1461                 return dasd_eckd_start_analysis(block);
1462         else
1463                 return dasd_eckd_end_analysis(block);
1464 }
1465
1466 static int dasd_eckd_ready_to_online(struct dasd_device *device)
1467 {
1468         return dasd_alias_add_device(device);
1469 };
1470
1471 static int dasd_eckd_online_to_ready(struct dasd_device *device)
1472 {
1473         cancel_work_sync(&device->reload_device);
1474         return dasd_alias_remove_device(device);
1475 };
1476
1477 static int
1478 dasd_eckd_fill_geometry(struct dasd_block *block, struct hd_geometry *geo)
1479 {
1480         struct dasd_eckd_private *private;
1481
1482         private = (struct dasd_eckd_private *) block->base->private;
1483         if (dasd_check_blocksize(block->bp_block) == 0) {
1484                 geo->sectors = recs_per_track(&private->rdc_data,
1485                                               0, block->bp_block);
1486         }
1487         geo->cylinders = private->rdc_data.no_cyl;
1488         geo->heads = private->rdc_data.trk_per_cyl;
1489         return 0;
1490 }
1491
1492 static struct dasd_ccw_req *
1493 dasd_eckd_format_device(struct dasd_device * device,
1494                         struct format_data_t * fdata)
1495 {
1496         struct dasd_eckd_private *private;
1497         struct dasd_ccw_req *fcp;
1498         struct eckd_count *ect;
1499         struct ccw1 *ccw;
1500         void *data;
1501         int rpt;
1502         struct ch_t address;
1503         int cplength, datasize;
1504         int i;
1505         int intensity = 0;
1506         int r0_perm;
1507
1508         private = (struct dasd_eckd_private *) device->private;
1509         rpt = recs_per_track(&private->rdc_data, 0, fdata->blksize);
1510         set_ch_t(&address,
1511                  fdata->start_unit / private->rdc_data.trk_per_cyl,
1512                  fdata->start_unit % private->rdc_data.trk_per_cyl);
1513
1514         /* Sanity checks. */
1515         if (fdata->start_unit >=
1516             (private->real_cyl * private->rdc_data.trk_per_cyl)) {
1517                 dev_warn(&device->cdev->dev, "Start track number %d used in "
1518                          "formatting is too big\n", fdata->start_unit);
1519                 return ERR_PTR(-EINVAL);
1520         }
1521         if (fdata->start_unit > fdata->stop_unit) {
1522                 dev_warn(&device->cdev->dev, "Start track %d used in "
1523                          "formatting exceeds end track\n", fdata->start_unit);
1524                 return ERR_PTR(-EINVAL);
1525         }
1526         if (dasd_check_blocksize(fdata->blksize) != 0) {
1527                 dev_warn(&device->cdev->dev,
1528                          "The DASD cannot be formatted with block size %d\n",
1529                          fdata->blksize);
1530                 return ERR_PTR(-EINVAL);
1531         }
1532
1533         /*
1534          * fdata->intensity is a bit string that tells us what to do:
1535          *   Bit 0: write record zero
1536          *   Bit 1: write home address, currently not supported
1537          *   Bit 2: invalidate tracks
1538          *   Bit 3: use OS/390 compatible disk layout (cdl)
1539          *   Bit 4: do not allow storage subsystem to modify record zero
1540          * Only some bit combinations do make sense.
1541          */
1542         if (fdata->intensity & 0x10) {
1543                 r0_perm = 0;
1544                 intensity = fdata->intensity & ~0x10;
1545         } else {
1546                 r0_perm = 1;
1547                 intensity = fdata->intensity;
1548         }
1549         switch (intensity) {
1550         case 0x00:      /* Normal format */
1551         case 0x08:      /* Normal format, use cdl. */
1552                 cplength = 2 + rpt;
1553                 datasize = sizeof(struct DE_eckd_data) +
1554                         sizeof(struct LO_eckd_data) +
1555                         rpt * sizeof(struct eckd_count);
1556                 break;
1557         case 0x01:      /* Write record zero and format track. */
1558         case 0x09:      /* Write record zero and format track, use cdl. */
1559                 cplength = 3 + rpt;
1560                 datasize = sizeof(struct DE_eckd_data) +
1561                         sizeof(struct LO_eckd_data) +
1562                         sizeof(struct eckd_count) +
1563                         rpt * sizeof(struct eckd_count);
1564                 break;
1565         case 0x04:      /* Invalidate track. */
1566         case 0x0c:      /* Invalidate track, use cdl. */
1567                 cplength = 3;
1568                 datasize = sizeof(struct DE_eckd_data) +
1569                         sizeof(struct LO_eckd_data) +
1570                         sizeof(struct eckd_count);
1571                 break;
1572         default:
1573                 dev_warn(&device->cdev->dev, "An I/O control call used "
1574                          "incorrect flags 0x%x\n", fdata->intensity);
1575                 return ERR_PTR(-EINVAL);
1576         }
1577         /* Allocate the format ccw request. */
1578         fcp = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, device);
1579         if (IS_ERR(fcp))
1580                 return fcp;
1581
1582         data = fcp->data;
1583         ccw = fcp->cpaddr;
1584
1585         switch (intensity & ~0x08) {
1586         case 0x00: /* Normal format. */
1587                 define_extent(ccw++, (struct DE_eckd_data *) data,
1588                               fdata->start_unit, fdata->start_unit,
1589                               DASD_ECKD_CCW_WRITE_CKD, device);
1590                 /* grant subsystem permission to format R0 */
1591                 if (r0_perm)
1592                         ((struct DE_eckd_data *)data)->ga_extended |= 0x04;
1593                 data += sizeof(struct DE_eckd_data);
1594                 ccw[-1].flags |= CCW_FLAG_CC;
1595                 locate_record(ccw++, (struct LO_eckd_data *) data,
1596                               fdata->start_unit, 0, rpt,
1597                               DASD_ECKD_CCW_WRITE_CKD, device,
1598                               fdata->blksize);
1599                 data += sizeof(struct LO_eckd_data);
1600                 break;
1601         case 0x01: /* Write record zero + format track. */
1602                 define_extent(ccw++, (struct DE_eckd_data *) data,
1603                               fdata->start_unit, fdata->start_unit,
1604                               DASD_ECKD_CCW_WRITE_RECORD_ZERO,
1605                               device);
1606                 data += sizeof(struct DE_eckd_data);
1607                 ccw[-1].flags |= CCW_FLAG_CC;
1608                 locate_record(ccw++, (struct LO_eckd_data *) data,
1609                               fdata->start_unit, 0, rpt + 1,
1610                               DASD_ECKD_CCW_WRITE_RECORD_ZERO, device,
1611                               device->block->bp_block);
1612                 data += sizeof(struct LO_eckd_data);
1613                 break;
1614         case 0x04: /* Invalidate track. */
1615                 define_extent(ccw++, (struct DE_eckd_data *) data,
1616                               fdata->start_unit, fdata->start_unit,
1617                               DASD_ECKD_CCW_WRITE_CKD, device);
1618                 data += sizeof(struct DE_eckd_data);
1619                 ccw[-1].flags |= CCW_FLAG_CC;
1620                 locate_record(ccw++, (struct LO_eckd_data *) data,
1621                               fdata->start_unit, 0, 1,
1622                               DASD_ECKD_CCW_WRITE_CKD, device, 8);
1623                 data += sizeof(struct LO_eckd_data);
1624                 break;
1625         }
1626         if (intensity & 0x01) { /* write record zero */
1627                 ect = (struct eckd_count *) data;
1628                 data += sizeof(struct eckd_count);
1629                 ect->cyl = address.cyl;
1630                 ect->head = address.head;
1631                 ect->record = 0;
1632                 ect->kl = 0;
1633                 ect->dl = 8;
1634                 ccw[-1].flags |= CCW_FLAG_CC;
1635                 ccw->cmd_code = DASD_ECKD_CCW_WRITE_RECORD_ZERO;
1636                 ccw->flags = CCW_FLAG_SLI;
1637                 ccw->count = 8;
1638                 ccw->cda = (__u32)(addr_t) ect;
1639                 ccw++;
1640         }
1641         if ((intensity & ~0x08) & 0x04) {       /* erase track */
1642                 ect = (struct eckd_count *) data;
1643                 data += sizeof(struct eckd_count);
1644                 ect->cyl = address.cyl;
1645                 ect->head = address.head;
1646                 ect->record = 1;
1647                 ect->kl = 0;
1648                 ect->dl = 0;
1649                 ccw[-1].flags |= CCW_FLAG_CC;
1650                 ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD;
1651                 ccw->flags = CCW_FLAG_SLI;
1652                 ccw->count = 8;
1653                 ccw->cda = (__u32)(addr_t) ect;
1654         } else {                /* write remaining records */
1655                 for (i = 0; i < rpt; i++) {
1656                         ect = (struct eckd_count *) data;
1657                         data += sizeof(struct eckd_count);
1658                         ect->cyl = address.cyl;
1659                         ect->head = address.head;
1660                         ect->record = i + 1;
1661                         ect->kl = 0;
1662                         ect->dl = fdata->blksize;
1663                         /* Check for special tracks 0-1 when formatting CDL */
1664                         if ((intensity & 0x08) &&
1665                             fdata->start_unit == 0) {
1666                                 if (i < 3) {
1667                                         ect->kl = 4;
1668                                         ect->dl = sizes_trk0[i] - 4;
1669                                 }
1670                         }
1671                         if ((intensity & 0x08) &&
1672                             fdata->start_unit == 1) {
1673                                 ect->kl = 44;
1674                                 ect->dl = LABEL_SIZE - 44;
1675                         }
1676                         ccw[-1].flags |= CCW_FLAG_CC;
1677                         ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD;
1678                         ccw->flags = CCW_FLAG_SLI;
1679                         ccw->count = 8;
1680                         ccw->cda = (__u32)(addr_t) ect;
1681                         ccw++;
1682                 }
1683         }
1684         fcp->startdev = device;
1685         fcp->memdev = device;
1686         fcp->retries = 256;
1687         fcp->buildclk = get_clock();
1688         fcp->status = DASD_CQR_FILLED;
1689         return fcp;
1690 }
1691
1692 static void dasd_eckd_handle_terminated_request(struct dasd_ccw_req *cqr)
1693 {
1694         cqr->status = DASD_CQR_FILLED;
1695         if (cqr->block && (cqr->startdev != cqr->block->base)) {
1696                 dasd_eckd_reset_ccw_to_base_io(cqr);
1697                 cqr->startdev = cqr->block->base;
1698         }
1699 };
1700
1701 static dasd_erp_fn_t
1702 dasd_eckd_erp_action(struct dasd_ccw_req * cqr)
1703 {
1704         struct dasd_device *device = (struct dasd_device *) cqr->startdev;
1705         struct ccw_device *cdev = device->cdev;
1706
1707         switch (cdev->id.cu_type) {
1708         case 0x3990:
1709         case 0x2105:
1710         case 0x2107:
1711         case 0x1750:
1712                 return dasd_3990_erp_action;
1713         case 0x9343:
1714         case 0x3880:
1715         default:
1716                 return dasd_default_erp_action;
1717         }
1718 }
1719
1720 static dasd_erp_fn_t
1721 dasd_eckd_erp_postaction(struct dasd_ccw_req * cqr)
1722 {
1723         return dasd_default_erp_postaction;
1724 }
1725
1726
1727 static void dasd_eckd_handle_unsolicited_interrupt(struct dasd_device *device,
1728                                                    struct irb *irb)
1729 {
1730         char mask;
1731         char *sense = NULL;
1732         struct dasd_eckd_private *private;
1733
1734         private = (struct dasd_eckd_private *) device->private;
1735         /* first of all check for state change pending interrupt */
1736         mask = DEV_STAT_ATTENTION | DEV_STAT_DEV_END | DEV_STAT_UNIT_EXCEP;
1737         if ((scsw_dstat(&irb->scsw) & mask) == mask) {
1738                 /* for alias only and not in offline processing*/
1739                 if (!device->block && private->lcu &&
1740                     !test_bit(DASD_FLAG_OFFLINE, &device->flags)) {
1741                         /*
1742                          * the state change could be caused by an alias
1743                          * reassignment remove device from alias handling
1744                          * to prevent new requests from being scheduled on
1745                          * the wrong alias device
1746                          */
1747                         dasd_alias_remove_device(device);
1748
1749                         /* schedule worker to reload device */
1750                         dasd_reload_device(device);
1751                 }
1752
1753                 dasd_generic_handle_state_change(device);
1754                 return;
1755         }
1756
1757         /* summary unit check */
1758         if ((scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK) &&
1759             (irb->ecw[7] == 0x0D)) {
1760                 dasd_alias_handle_summary_unit_check(device, irb);
1761                 return;
1762         }
1763
1764         sense = dasd_get_sense(irb);
1765         /* service information message SIM */
1766         if (sense && !(sense[27] & DASD_SENSE_BIT_0) &&
1767             ((sense[6] & DASD_SIM_SENSE) == DASD_SIM_SENSE)) {
1768                 dasd_3990_erp_handle_sim(device, sense);
1769                 dasd_schedule_device_bh(device);
1770                 return;
1771         }
1772
1773         if ((scsw_cc(&irb->scsw) == 1) &&
1774             (scsw_fctl(&irb->scsw) & SCSW_FCTL_START_FUNC) &&
1775             (scsw_actl(&irb->scsw) & SCSW_ACTL_START_PEND) &&
1776             (scsw_stctl(&irb->scsw) & SCSW_STCTL_STATUS_PEND)) {
1777                 /* fake irb do nothing, they are handled elsewhere */
1778                 dasd_schedule_device_bh(device);
1779                 return;
1780         }
1781
1782         if (!sense) {
1783                 /* just report other unsolicited interrupts */
1784                 DBF_DEV_EVENT(DBF_ERR, device, "%s",
1785                             "unsolicited interrupt received");
1786         } else {
1787                 DBF_DEV_EVENT(DBF_ERR, device, "%s",
1788                             "unsolicited interrupt received "
1789                             "(sense available)");
1790                 device->discipline->dump_sense_dbf(device, irb, "unsolicited");
1791         }
1792
1793         dasd_schedule_device_bh(device);
1794         return;
1795 };
1796
1797
1798 static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_single(
1799                                                struct dasd_device *startdev,
1800                                                struct dasd_block *block,
1801                                                struct request *req,
1802                                                sector_t first_rec,
1803                                                sector_t last_rec,
1804                                                sector_t first_trk,
1805                                                sector_t last_trk,
1806                                                unsigned int first_offs,
1807                                                unsigned int last_offs,
1808                                                unsigned int blk_per_trk,
1809                                                unsigned int blksize)
1810 {
1811         struct dasd_eckd_private *private;
1812         unsigned long *idaws;
1813         struct LO_eckd_data *LO_data;
1814         struct dasd_ccw_req *cqr;
1815         struct ccw1 *ccw;
1816         struct req_iterator iter;
1817         struct bio_vec *bv;
1818         char *dst;
1819         unsigned int off;
1820         int count, cidaw, cplength, datasize;
1821         sector_t recid;
1822         unsigned char cmd, rcmd;
1823         int use_prefix;
1824         struct dasd_device *basedev;
1825
1826         basedev = block->base;
1827         private = (struct dasd_eckd_private *) basedev->private;
1828         if (rq_data_dir(req) == READ)
1829                 cmd = DASD_ECKD_CCW_READ_MT;
1830         else if (rq_data_dir(req) == WRITE)
1831                 cmd = DASD_ECKD_CCW_WRITE_MT;
1832         else
1833                 return ERR_PTR(-EINVAL);
1834
1835         /* Check struct bio and count the number of blocks for the request. */
1836         count = 0;
1837         cidaw = 0;
1838         rq_for_each_segment(bv, req, iter) {
1839                 if (bv->bv_len & (blksize - 1))
1840                         /* Eckd can only do full blocks. */
1841                         return ERR_PTR(-EINVAL);
1842                 count += bv->bv_len >> (block->s2b_shift + 9);
1843 #if defined(CONFIG_64BIT)
1844                 if (idal_is_needed (page_address(bv->bv_page), bv->bv_len))
1845                         cidaw += bv->bv_len >> (block->s2b_shift + 9);
1846 #endif
1847         }
1848         /* Paranoia. */
1849         if (count != last_rec - first_rec + 1)
1850                 return ERR_PTR(-EINVAL);
1851
1852         /* use the prefix command if available */
1853         use_prefix = private->features.feature[8] & 0x01;
1854         if (use_prefix) {
1855                 /* 1x prefix + number of blocks */
1856                 cplength = 2 + count;
1857                 /* 1x prefix + cidaws*sizeof(long) */
1858                 datasize = sizeof(struct PFX_eckd_data) +
1859                         sizeof(struct LO_eckd_data) +
1860                         cidaw * sizeof(unsigned long);
1861         } else {
1862                 /* 1x define extent + 1x locate record + number of blocks */
1863                 cplength = 2 + count;
1864                 /* 1x define extent + 1x locate record + cidaws*sizeof(long) */
1865                 datasize = sizeof(struct DE_eckd_data) +
1866                         sizeof(struct LO_eckd_data) +
1867                         cidaw * sizeof(unsigned long);
1868         }
1869         /* Find out the number of additional locate record ccws for cdl. */
1870         if (private->uses_cdl && first_rec < 2*blk_per_trk) {
1871                 if (last_rec >= 2*blk_per_trk)
1872                         count = 2*blk_per_trk - first_rec;
1873                 cplength += count;
1874                 datasize += count*sizeof(struct LO_eckd_data);
1875         }
1876         /* Allocate the ccw request. */
1877         cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize,
1878                                    startdev);
1879         if (IS_ERR(cqr))
1880                 return cqr;
1881         ccw = cqr->cpaddr;
1882         /* First ccw is define extent or prefix. */
1883         if (use_prefix) {
1884                 if (prefix(ccw++, cqr->data, first_trk,
1885                            last_trk, cmd, basedev, startdev) == -EAGAIN) {
1886                         /* Clock not in sync and XRC is enabled.
1887                          * Try again later.
1888                          */
1889                         dasd_sfree_request(cqr, startdev);
1890                         return ERR_PTR(-EAGAIN);
1891                 }
1892                 idaws = (unsigned long *) (cqr->data +
1893                                            sizeof(struct PFX_eckd_data));
1894         } else {
1895                 if (define_extent(ccw++, cqr->data, first_trk,
1896                                   last_trk, cmd, startdev) == -EAGAIN) {
1897                         /* Clock not in sync and XRC is enabled.
1898                          * Try again later.
1899                          */
1900                         dasd_sfree_request(cqr, startdev);
1901                         return ERR_PTR(-EAGAIN);
1902                 }
1903                 idaws = (unsigned long *) (cqr->data +
1904                                            sizeof(struct DE_eckd_data));
1905         }
1906         /* Build locate_record+read/write/ccws. */
1907         LO_data = (struct LO_eckd_data *) (idaws + cidaw);
1908         recid = first_rec;
1909         if (private->uses_cdl == 0 || recid > 2*blk_per_trk) {
1910                 /* Only standard blocks so there is just one locate record. */
1911                 ccw[-1].flags |= CCW_FLAG_CC;
1912                 locate_record(ccw++, LO_data++, first_trk, first_offs + 1,
1913                               last_rec - recid + 1, cmd, basedev, blksize);
1914         }
1915         rq_for_each_segment(bv, req, iter) {
1916                 dst = page_address(bv->bv_page) + bv->bv_offset;
1917                 if (dasd_page_cache) {
1918                         char *copy = kmem_cache_alloc(dasd_page_cache,
1919                                                       GFP_DMA | __GFP_NOWARN);
1920                         if (copy && rq_data_dir(req) == WRITE)
1921                                 memcpy(copy + bv->bv_offset, dst, bv->bv_len);
1922                         if (copy)
1923                                 dst = copy + bv->bv_offset;
1924                 }
1925                 for (off = 0; off < bv->bv_len; off += blksize) {
1926                         sector_t trkid = recid;
1927                         unsigned int recoffs = sector_div(trkid, blk_per_trk);
1928                         rcmd = cmd;
1929                         count = blksize;
1930                         /* Locate record for cdl special block ? */
1931                         if (private->uses_cdl && recid < 2*blk_per_trk) {
1932                                 if (dasd_eckd_cdl_special(blk_per_trk, recid)){
1933                                         rcmd |= 0x8;
1934                                         count = dasd_eckd_cdl_reclen(recid);
1935                                         if (count < blksize &&
1936                                             rq_data_dir(req) == READ)
1937                                                 memset(dst + count, 0xe5,
1938                                                        blksize - count);
1939                                 }
1940                                 ccw[-1].flags |= CCW_FLAG_CC;
1941                                 locate_record(ccw++, LO_data++,
1942                                               trkid, recoffs + 1,
1943                                               1, rcmd, basedev, count);
1944                         }
1945                         /* Locate record for standard blocks ? */
1946                         if (private->uses_cdl && recid == 2*blk_per_trk) {
1947                                 ccw[-1].flags |= CCW_FLAG_CC;
1948                                 locate_record(ccw++, LO_data++,
1949                                               trkid, recoffs + 1,
1950                                               last_rec - recid + 1,
1951                                               cmd, basedev, count);
1952                         }
1953                         /* Read/write ccw. */
1954                         ccw[-1].flags |= CCW_FLAG_CC;
1955                         ccw->cmd_code = rcmd;
1956                         ccw->count = count;
1957                         if (idal_is_needed(dst, blksize)) {
1958                                 ccw->cda = (__u32)(addr_t) idaws;
1959                                 ccw->flags = CCW_FLAG_IDA;
1960                                 idaws = idal_create_words(idaws, dst, blksize);
1961                         } else {
1962                                 ccw->cda = (__u32)(addr_t) dst;
1963                                 ccw->flags = 0;
1964                         }
1965                         ccw++;
1966                         dst += blksize;
1967                         recid++;
1968                 }
1969         }
1970         if (blk_noretry_request(req) ||
1971             block->base->features & DASD_FEATURE_FAILFAST)
1972                 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
1973         cqr->startdev = startdev;
1974         cqr->memdev = startdev;
1975         cqr->block = block;
1976         cqr->expires = 5 * 60 * HZ;     /* 5 minutes */
1977         cqr->lpm = private->path_data.ppm;
1978         cqr->retries = 256;
1979         cqr->buildclk = get_clock();
1980         cqr->status = DASD_CQR_FILLED;
1981         return cqr;
1982 }
1983
1984 static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_track(
1985                                                struct dasd_device *startdev,
1986                                                struct dasd_block *block,
1987                                                struct request *req,
1988                                                sector_t first_rec,
1989                                                sector_t last_rec,
1990                                                sector_t first_trk,
1991                                                sector_t last_trk,
1992                                                unsigned int first_offs,
1993                                                unsigned int last_offs,
1994                                                unsigned int blk_per_trk,
1995                                                unsigned int blksize)
1996 {
1997         struct dasd_eckd_private *private;
1998         unsigned long *idaws;
1999         struct dasd_ccw_req *cqr;
2000         struct ccw1 *ccw;
2001         struct req_iterator iter;
2002         struct bio_vec *bv;
2003         char *dst, *idaw_dst;
2004         unsigned int cidaw, cplength, datasize;
2005         unsigned int tlf;
2006         sector_t recid;
2007         unsigned char cmd;
2008         struct dasd_device *basedev;
2009         unsigned int trkcount, count, count_to_trk_end;
2010         unsigned int idaw_len, seg_len, part_len, len_to_track_end;
2011         unsigned char new_track, end_idaw;
2012         sector_t trkid;
2013         unsigned int recoffs;
2014
2015         basedev = block->base;
2016         private = (struct dasd_eckd_private *) basedev->private;
2017         if (rq_data_dir(req) == READ)
2018                 cmd = DASD_ECKD_CCW_READ_TRACK_DATA;
2019         else if (rq_data_dir(req) == WRITE)
2020                 cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA;
2021         else
2022                 return ERR_PTR(-EINVAL);
2023
2024         /* Track based I/O needs IDAWs for each page, and not just for
2025          * 64 bit addresses. We need additional idals for pages
2026          * that get filled from two tracks, so we use the number
2027          * of records as upper limit.
2028          */
2029         cidaw = last_rec - first_rec + 1;
2030         trkcount = last_trk - first_trk + 1;
2031
2032         /* 1x prefix + one read/write ccw per track */
2033         cplength = 1 + trkcount;
2034
2035         /* on 31-bit we need space for two 32 bit addresses per page
2036          * on 64-bit one 64 bit address
2037          */
2038         datasize = sizeof(struct PFX_eckd_data) +
2039                 cidaw * sizeof(unsigned long long);
2040
2041         /* Allocate the ccw request. */
2042         cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize,
2043                                    startdev);
2044         if (IS_ERR(cqr))
2045                 return cqr;
2046         ccw = cqr->cpaddr;
2047         /* transfer length factor: how many bytes to read from the last track */
2048         if (first_trk == last_trk)
2049                 tlf = last_offs - first_offs + 1;
2050         else
2051                 tlf = last_offs + 1;
2052         tlf *= blksize;
2053
2054         if (prefix_LRE(ccw++, cqr->data, first_trk,
2055                        last_trk, cmd, basedev, startdev,
2056                        1 /* format */, first_offs + 1,
2057                        trkcount, blksize,
2058                        tlf) == -EAGAIN) {
2059                 /* Clock not in sync and XRC is enabled.
2060                  * Try again later.
2061                  */
2062                 dasd_sfree_request(cqr, startdev);
2063                 return ERR_PTR(-EAGAIN);
2064         }
2065
2066         /*
2067          * The translation of request into ccw programs must meet the
2068          * following conditions:
2069          * - all idaws but the first and the last must address full pages
2070          *   (or 2K blocks on 31-bit)
2071          * - the scope of a ccw and it's idal ends with the track boundaries
2072          */
2073         idaws = (unsigned long *) (cqr->data + sizeof(struct PFX_eckd_data));
2074         recid = first_rec;
2075         new_track = 1;
2076         end_idaw = 0;
2077         len_to_track_end = 0;
2078         idaw_dst = 0;
2079         idaw_len = 0;
2080         rq_for_each_segment(bv, req, iter) {
2081                 dst = page_address(bv->bv_page) + bv->bv_offset;
2082                 seg_len = bv->bv_len;
2083                 while (seg_len) {
2084                         if (new_track) {
2085                                 trkid = recid;
2086                                 recoffs = sector_div(trkid, blk_per_trk);
2087                                 count_to_trk_end = blk_per_trk - recoffs;
2088                                 count = min((last_rec - recid + 1),
2089                                             (sector_t)count_to_trk_end);
2090                                 len_to_track_end = count * blksize;
2091                                 ccw[-1].flags |= CCW_FLAG_CC;
2092                                 ccw->cmd_code = cmd;
2093                                 ccw->count = len_to_track_end;
2094                                 ccw->cda = (__u32)(addr_t)idaws;
2095                                 ccw->flags = CCW_FLAG_IDA;
2096                                 ccw++;
2097                                 recid += count;
2098                                 new_track = 0;
2099                                 /* first idaw for a ccw may start anywhere */
2100                                 if (!idaw_dst)
2101                                         idaw_dst = dst;
2102                         }
2103                         /* If we start a new idaw, we must make sure that it
2104                          * starts on an IDA_BLOCK_SIZE boundary.
2105                          * If we continue an idaw, we must make sure that the
2106                          * current segment begins where the so far accumulated
2107                          * idaw ends
2108                          */
2109                         if (!idaw_dst) {
2110                                 if (__pa(dst) & (IDA_BLOCK_SIZE-1)) {
2111                                         dasd_sfree_request(cqr, startdev);
2112                                         return ERR_PTR(-ERANGE);
2113                                 } else
2114                                         idaw_dst = dst;
2115                         }
2116                         if ((idaw_dst + idaw_len) != dst) {
2117                                 dasd_sfree_request(cqr, startdev);
2118                                 return ERR_PTR(-ERANGE);
2119                         }
2120                         part_len = min(seg_len, len_to_track_end);
2121                         seg_len -= part_len;
2122                         dst += part_len;
2123                         idaw_len += part_len;
2124                         len_to_track_end -= part_len;
2125                         /* collected memory area ends on an IDA_BLOCK border,
2126                          * -> create an idaw
2127                          * idal_create_words will handle cases where idaw_len
2128                          * is larger then IDA_BLOCK_SIZE
2129                          */
2130                         if (!(__pa(idaw_dst + idaw_len) & (IDA_BLOCK_SIZE-1)))
2131                                 end_idaw = 1;
2132                         /* We also need to end the idaw at track end */
2133                         if (!len_to_track_end) {
2134                                 new_track = 1;
2135                                 end_idaw = 1;
2136                         }
2137                         if (end_idaw) {
2138                                 idaws = idal_create_words(idaws, idaw_dst,
2139                                                           idaw_len);
2140                                 idaw_dst = 0;
2141                                 idaw_len = 0;
2142                                 end_idaw = 0;
2143                         }
2144                 }
2145         }
2146
2147         if (blk_noretry_request(req) ||
2148             block->base->features & DASD_FEATURE_FAILFAST)
2149                 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
2150         cqr->startdev = startdev;
2151         cqr->memdev = startdev;
2152         cqr->block = block;
2153         cqr->expires = 5 * 60 * HZ;     /* 5 minutes */
2154         cqr->lpm = private->path_data.ppm;
2155         cqr->retries = 256;
2156         cqr->buildclk = get_clock();
2157         cqr->status = DASD_CQR_FILLED;
2158         return cqr;
2159 }
2160
2161 static int prepare_itcw(struct itcw *itcw,
2162                         unsigned int trk, unsigned int totrk, int cmd,
2163                         struct dasd_device *basedev,
2164                         struct dasd_device *startdev,
2165                         unsigned int rec_on_trk, int count,
2166                         unsigned int blksize,
2167                         unsigned int total_data_size,
2168                         unsigned int tlf,
2169                         unsigned int blk_per_trk)
2170 {
2171         struct PFX_eckd_data pfxdata;
2172         struct dasd_eckd_private *basepriv, *startpriv;
2173         struct DE_eckd_data *dedata;
2174         struct LRE_eckd_data *lredata;
2175         struct dcw *dcw;
2176
2177         u32 begcyl, endcyl;
2178         u16 heads, beghead, endhead;
2179         u8 pfx_cmd;
2180
2181         int rc = 0;
2182         int sector = 0;
2183         int dn, d;
2184
2185
2186         /* setup prefix data */
2187         basepriv = (struct dasd_eckd_private *) basedev->private;
2188         startpriv = (struct dasd_eckd_private *) startdev->private;
2189         dedata = &pfxdata.define_extent;
2190         lredata = &pfxdata.locate_record;
2191
2192         memset(&pfxdata, 0, sizeof(pfxdata));
2193         pfxdata.format = 1; /* PFX with LRE */
2194         pfxdata.base_address = basepriv->ned->unit_addr;
2195         pfxdata.base_lss = basepriv->ned->ID;
2196         pfxdata.validity.define_extent = 1;
2197
2198         /* private uid is kept up to date, conf_data may be outdated */
2199         if (startpriv->uid.type != UA_BASE_DEVICE) {
2200                 pfxdata.validity.verify_base = 1;
2201                 if (startpriv->uid.type == UA_HYPER_PAV_ALIAS)
2202                         pfxdata.validity.hyper_pav = 1;
2203         }
2204
2205         switch (cmd) {
2206         case DASD_ECKD_CCW_READ_TRACK_DATA:
2207                 dedata->mask.perm = 0x1;
2208                 dedata->attributes.operation = basepriv->attrib.operation;
2209                 dedata->blk_size = blksize;
2210                 dedata->ga_extended |= 0x42;
2211                 lredata->operation.orientation = 0x0;
2212                 lredata->operation.operation = 0x0C;
2213                 lredata->auxiliary.check_bytes = 0x01;
2214                 pfx_cmd = DASD_ECKD_CCW_PFX_READ;
2215                 break;
2216         case DASD_ECKD_CCW_WRITE_TRACK_DATA:
2217                 dedata->mask.perm = 0x02;
2218                 dedata->attributes.operation = basepriv->attrib.operation;
2219                 dedata->blk_size = blksize;
2220                 rc = check_XRC_on_prefix(&pfxdata, basedev);
2221                 dedata->ga_extended |= 0x42;
2222                 lredata->operation.orientation = 0x0;
2223                 lredata->operation.operation = 0x3F;
2224                 lredata->extended_operation = 0x23;
2225                 lredata->auxiliary.check_bytes = 0x2;
2226                 pfx_cmd = DASD_ECKD_CCW_PFX;
2227                 break;
2228         default:
2229                 DBF_DEV_EVENT(DBF_ERR, basedev,
2230                               "prepare itcw, unknown opcode 0x%x", cmd);
2231                 BUG();
2232                 break;
2233         }
2234         if (rc)
2235                 return rc;
2236
2237         dedata->attributes.mode = 0x3;  /* ECKD */
2238
2239         heads = basepriv->rdc_data.trk_per_cyl;
2240         begcyl = trk / heads;
2241         beghead = trk % heads;
2242         endcyl = totrk / heads;
2243         endhead = totrk % heads;
2244
2245         /* check for sequential prestage - enhance cylinder range */
2246         if (dedata->attributes.operation == DASD_SEQ_PRESTAGE ||
2247             dedata->attributes.operation == DASD_SEQ_ACCESS) {
2248
2249                 if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl)
2250                         endcyl += basepriv->attrib.nr_cyl;
2251                 else
2252                         endcyl = (basepriv->real_cyl - 1);
2253         }
2254
2255         set_ch_t(&dedata->beg_ext, begcyl, beghead);
2256         set_ch_t(&dedata->end_ext, endcyl, endhead);
2257
2258         dedata->ep_format = 0x20; /* records per track is valid */
2259         dedata->ep_rec_per_track = blk_per_trk;
2260
2261         if (rec_on_trk) {
2262                 switch (basepriv->rdc_data.dev_type) {
2263                 case 0x3390:
2264                         dn = ceil_quot(blksize + 6, 232);
2265                         d = 9 + ceil_quot(blksize + 6 * (dn + 1), 34);
2266                         sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8;
2267                         break;
2268                 case 0x3380:
2269                         d = 7 + ceil_quot(blksize + 12, 32);
2270                         sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7;
2271                         break;
2272                 }
2273         }
2274
2275         lredata->auxiliary.length_valid = 1;
2276         lredata->auxiliary.length_scope = 1;
2277         lredata->auxiliary.imbedded_ccw_valid = 1;
2278         lredata->length = tlf;
2279         lredata->imbedded_ccw = cmd;
2280         lredata->count = count;
2281         lredata->sector = sector;
2282         set_ch_t(&lredata->seek_addr, begcyl, beghead);
2283         lredata->search_arg.cyl = lredata->seek_addr.cyl;
2284         lredata->search_arg.head = lredata->seek_addr.head;
2285         lredata->search_arg.record = rec_on_trk;
2286
2287         dcw = itcw_add_dcw(itcw, pfx_cmd, 0,
2288                      &pfxdata, sizeof(pfxdata), total_data_size);
2289
2290         return rc;
2291 }
2292
2293 static struct dasd_ccw_req *dasd_eckd_build_cp_tpm_track(
2294                                                struct dasd_device *startdev,
2295                                                struct dasd_block *block,
2296                                                struct request *req,
2297                                                sector_t first_rec,
2298                                                sector_t last_rec,
2299                                                sector_t first_trk,
2300                                                sector_t last_trk,
2301                                                unsigned int first_offs,
2302                                                unsigned int last_offs,
2303                                                unsigned int blk_per_trk,
2304                                                unsigned int blksize)
2305 {
2306         struct dasd_eckd_private *private;
2307         struct dasd_ccw_req *cqr;
2308         struct req_iterator iter;
2309         struct bio_vec *bv;
2310         char *dst;
2311         unsigned int trkcount, ctidaw;
2312         unsigned char cmd;
2313         struct dasd_device *basedev;
2314         unsigned int tlf;
2315         struct itcw *itcw;
2316         struct tidaw *last_tidaw = NULL;
2317         int itcw_op;
2318         size_t itcw_size;
2319
2320         basedev = block->base;
2321         private = (struct dasd_eckd_private *) basedev->private;
2322         if (rq_data_dir(req) == READ) {
2323                 cmd = DASD_ECKD_CCW_READ_TRACK_DATA;
2324                 itcw_op = ITCW_OP_READ;
2325         } else if (rq_data_dir(req) == WRITE) {
2326                 cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA;
2327                 itcw_op = ITCW_OP_WRITE;
2328         } else
2329                 return ERR_PTR(-EINVAL);
2330
2331         /* trackbased I/O needs address all memory via TIDAWs,
2332          * not just for 64 bit addresses. This allows us to map
2333          * each segment directly to one tidaw.
2334          */
2335         trkcount = last_trk - first_trk + 1;
2336         ctidaw = 0;
2337         rq_for_each_segment(bv, req, iter) {
2338                 ++ctidaw;
2339         }
2340
2341         /* Allocate the ccw request. */
2342         itcw_size = itcw_calc_size(0, ctidaw, 0);
2343         cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 0, itcw_size, startdev);
2344         if (IS_ERR(cqr))
2345                 return cqr;
2346
2347         cqr->cpmode = 1;
2348         cqr->startdev = startdev;
2349         cqr->memdev = startdev;
2350         cqr->block = block;
2351         cqr->expires = 100*HZ;
2352         cqr->buildclk = get_clock();
2353         cqr->status = DASD_CQR_FILLED;
2354         cqr->retries = 10;
2355
2356         /* transfer length factor: how many bytes to read from the last track */
2357         if (first_trk == last_trk)
2358                 tlf = last_offs - first_offs + 1;
2359         else
2360                 tlf = last_offs + 1;
2361         tlf *= blksize;
2362
2363         itcw = itcw_init(cqr->data, itcw_size, itcw_op, 0, ctidaw, 0);
2364         cqr->cpaddr = itcw_get_tcw(itcw);
2365
2366         if (prepare_itcw(itcw, first_trk, last_trk,
2367                          cmd, basedev, startdev,
2368                          first_offs + 1,
2369                          trkcount, blksize,
2370                          (last_rec - first_rec + 1) * blksize,
2371                          tlf, blk_per_trk) == -EAGAIN) {
2372                 /* Clock not in sync and XRC is enabled.
2373                  * Try again later.
2374                  */
2375                 dasd_sfree_request(cqr, startdev);
2376                 return ERR_PTR(-EAGAIN);
2377         }
2378
2379         /*
2380          * A tidaw can address 4k of memory, but must not cross page boundaries
2381          * We can let the block layer handle this by setting
2382          * blk_queue_segment_boundary to page boundaries and
2383          * blk_max_segment_size to page size when setting up the request queue.
2384          */
2385         rq_for_each_segment(bv, req, iter) {
2386                 dst = page_address(bv->bv_page) + bv->bv_offset;
2387                 last_tidaw = itcw_add_tidaw(itcw, 0x00, dst, bv->bv_len);
2388                 if (IS_ERR(last_tidaw))
2389                         return (struct dasd_ccw_req *)last_tidaw;
2390         }
2391
2392         last_tidaw->flags |= 0x80;
2393         itcw_finalize(itcw);
2394
2395         if (blk_noretry_request(req) ||
2396             block->base->features & DASD_FEATURE_FAILFAST)
2397                 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
2398         cqr->startdev = startdev;
2399         cqr->memdev = startdev;
2400         cqr->block = block;
2401         cqr->expires = 5 * 60 * HZ;     /* 5 minutes */
2402         cqr->lpm = private->path_data.ppm;
2403         cqr->retries = 256;
2404         cqr->buildclk = get_clock();
2405         cqr->status = DASD_CQR_FILLED;
2406         return cqr;
2407 }
2408
2409 static struct dasd_ccw_req *dasd_eckd_build_cp(struct dasd_device *startdev,
2410                                                struct dasd_block *block,
2411                                                struct request *req)
2412 {
2413         int tpm, cmdrtd, cmdwtd;
2414         int use_prefix;
2415 #if defined(CONFIG_64BIT)
2416         int fcx_in_css, fcx_in_gneq, fcx_in_features;
2417 #endif
2418         struct dasd_eckd_private *private;
2419         struct dasd_device *basedev;
2420         sector_t first_rec, last_rec;
2421         sector_t first_trk, last_trk;
2422         unsigned int first_offs, last_offs;
2423         unsigned int blk_per_trk, blksize;
2424         int cdlspecial;
2425         struct dasd_ccw_req *cqr;
2426
2427         basedev = block->base;
2428         private = (struct dasd_eckd_private *) basedev->private;
2429
2430         /* Calculate number of blocks/records per track. */
2431         blksize = block->bp_block;
2432         blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize);
2433         if (blk_per_trk == 0)
2434                 return ERR_PTR(-EINVAL);
2435         /* Calculate record id of first and last block. */
2436         first_rec = first_trk = blk_rq_pos(req) >> block->s2b_shift;
2437         first_offs = sector_div(first_trk, blk_per_trk);
2438         last_rec = last_trk =
2439                 (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift;
2440         last_offs = sector_div(last_trk, blk_per_trk);
2441         cdlspecial = (private->uses_cdl && first_rec < 2*blk_per_trk);
2442
2443         /* is transport mode supported? */
2444 #if defined(CONFIG_64BIT)
2445         fcx_in_css = css_general_characteristics.fcx;
2446         fcx_in_gneq = private->gneq->reserved2[7] & 0x04;
2447         fcx_in_features = private->features.feature[40] & 0x80;
2448         tpm = fcx_in_css && fcx_in_gneq && fcx_in_features;
2449 #else
2450         tpm = 0;
2451 #endif
2452
2453         /* is read track data and write track data in command mode supported? */
2454         cmdrtd = private->features.feature[9] & 0x20;
2455         cmdwtd = private->features.feature[12] & 0x40;
2456         use_prefix = private->features.feature[8] & 0x01;
2457
2458         cqr = NULL;
2459         if (cdlspecial || dasd_page_cache) {
2460                 /* do nothing, just fall through to the cmd mode single case */
2461         } else if (!dasd_nofcx && tpm && (first_trk == last_trk)) {
2462                 cqr = dasd_eckd_build_cp_tpm_track(startdev, block, req,
2463                                                     first_rec, last_rec,
2464                                                     first_trk, last_trk,
2465                                                     first_offs, last_offs,
2466                                                     blk_per_trk, blksize);
2467                 if (IS_ERR(cqr) && PTR_ERR(cqr) != -EAGAIN)
2468                         cqr = NULL;
2469         } else if (use_prefix &&
2470                    (((rq_data_dir(req) == READ) && cmdrtd) ||
2471                     ((rq_data_dir(req) == WRITE) && cmdwtd))) {
2472                 cqr = dasd_eckd_build_cp_cmd_track(startdev, block, req,
2473                                                    first_rec, last_rec,
2474                                                    first_trk, last_trk,
2475                                                    first_offs, last_offs,
2476                                                    blk_per_trk, blksize);
2477                 if (IS_ERR(cqr) && PTR_ERR(cqr) != -EAGAIN)
2478                         cqr = NULL;
2479         }
2480         if (!cqr)
2481                 cqr = dasd_eckd_build_cp_cmd_single(startdev, block, req,
2482                                                     first_rec, last_rec,
2483                                                     first_trk, last_trk,
2484                                                     first_offs, last_offs,
2485                                                     blk_per_trk, blksize);
2486         return cqr;
2487 }
2488
2489 static int
2490 dasd_eckd_free_cp(struct dasd_ccw_req *cqr, struct request *req)
2491 {
2492         struct dasd_eckd_private *private;
2493         struct ccw1 *ccw;
2494         struct req_iterator iter;
2495         struct bio_vec *bv;
2496         char *dst, *cda;
2497         unsigned int blksize, blk_per_trk, off;
2498         sector_t recid;
2499         int status;
2500
2501         if (!dasd_page_cache)
2502                 goto out;
2503         private = (struct dasd_eckd_private *) cqr->block->base->private;
2504         blksize = cqr->block->bp_block;
2505         blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize);
2506         recid = blk_rq_pos(req) >> cqr->block->s2b_shift;
2507         ccw = cqr->cpaddr;
2508         /* Skip over define extent & locate record. */
2509         ccw++;
2510         if (private->uses_cdl == 0 || recid > 2*blk_per_trk)
2511                 ccw++;
2512         rq_for_each_segment(bv, req, iter) {
2513                 dst = page_address(bv->bv_page) + bv->bv_offset;
2514                 for (off = 0; off < bv->bv_len; off += blksize) {
2515                         /* Skip locate record. */
2516                         if (private->uses_cdl && recid <= 2*blk_per_trk)
2517                                 ccw++;
2518                         if (dst) {
2519                                 if (ccw->flags & CCW_FLAG_IDA)
2520                                         cda = *((char **)((addr_t) ccw->cda));
2521                                 else
2522                                         cda = (char *)((addr_t) ccw->cda);
2523                                 if (dst != cda) {
2524                                         if (rq_data_dir(req) == READ)
2525                                                 memcpy(dst, cda, bv->bv_len);
2526                                         kmem_cache_free(dasd_page_cache,
2527                                             (void *)((addr_t)cda & PAGE_MASK));
2528                                 }
2529                                 dst = NULL;
2530                         }
2531                         ccw++;
2532                         recid++;
2533                 }
2534         }
2535 out:
2536         status = cqr->status == DASD_CQR_DONE;
2537         dasd_sfree_request(cqr, cqr->memdev);
2538         return status;
2539 }
2540
2541 /*
2542  * Modify ccw/tcw in cqr so it can be started on a base device.
2543  *
2544  * Note that this is not enough to restart the cqr!
2545  * Either reset cqr->startdev as well (summary unit check handling)
2546  * or restart via separate cqr (as in ERP handling).
2547  */
2548 void dasd_eckd_reset_ccw_to_base_io(struct dasd_ccw_req *cqr)
2549 {
2550         struct ccw1 *ccw;
2551         struct PFX_eckd_data *pfxdata;
2552         struct tcw *tcw;
2553         struct tccb *tccb;
2554         struct dcw *dcw;
2555
2556         if (cqr->cpmode == 1) {
2557                 tcw = cqr->cpaddr;
2558                 tccb = tcw_get_tccb(tcw);
2559                 dcw = (struct dcw *)&tccb->tca[0];
2560                 pfxdata = (struct PFX_eckd_data *)&dcw->cd[0];
2561                 pfxdata->validity.verify_base = 0;
2562                 pfxdata->validity.hyper_pav = 0;
2563         } else {
2564                 ccw = cqr->cpaddr;
2565                 pfxdata = cqr->data;
2566                 if (ccw->cmd_code == DASD_ECKD_CCW_PFX) {
2567                         pfxdata->validity.verify_base = 0;
2568                         pfxdata->validity.hyper_pav = 0;
2569                 }
2570         }
2571 }
2572
2573 #define DASD_ECKD_CHANQ_MAX_SIZE 4
2574
2575 static struct dasd_ccw_req *dasd_eckd_build_alias_cp(struct dasd_device *base,
2576                                                      struct dasd_block *block,
2577                                                      struct request *req)
2578 {
2579         struct dasd_eckd_private *private;
2580         struct dasd_device *startdev;
2581         unsigned long flags;
2582         struct dasd_ccw_req *cqr;
2583
2584         startdev = dasd_alias_get_start_dev(base);
2585         if (!startdev)
2586                 startdev = base;
2587         private = (struct dasd_eckd_private *) startdev->private;
2588         if (private->count >= DASD_ECKD_CHANQ_MAX_SIZE)
2589                 return ERR_PTR(-EBUSY);
2590
2591         spin_lock_irqsave(get_ccwdev_lock(startdev->cdev), flags);
2592         private->count++;
2593         cqr = dasd_eckd_build_cp(startdev, block, req);
2594         if (IS_ERR(cqr))
2595                 private->count--;
2596         spin_unlock_irqrestore(get_ccwdev_lock(startdev->cdev), flags);
2597         return cqr;
2598 }
2599
2600 static int dasd_eckd_free_alias_cp(struct dasd_ccw_req *cqr,
2601                                    struct request *req)
2602 {
2603         struct dasd_eckd_private *private;
2604         unsigned long flags;
2605
2606         spin_lock_irqsave(get_ccwdev_lock(cqr->memdev->cdev), flags);
2607         private = (struct dasd_eckd_private *) cqr->memdev->private;
2608         private->count--;
2609         spin_unlock_irqrestore(get_ccwdev_lock(cqr->memdev->cdev), flags);
2610         return dasd_eckd_free_cp(cqr, req);
2611 }
2612
2613 static int
2614 dasd_eckd_fill_info(struct dasd_device * device,
2615                     struct dasd_information2_t * info)
2616 {
2617         struct dasd_eckd_private *private;
2618
2619         private = (struct dasd_eckd_private *) device->private;
2620         info->label_block = 2;
2621         info->FBA_layout = private->uses_cdl ? 0 : 1;
2622         info->format = private->uses_cdl ? DASD_FORMAT_CDL : DASD_FORMAT_LDL;
2623         info->characteristics_size = sizeof(struct dasd_eckd_characteristics);
2624         memcpy(info->characteristics, &private->rdc_data,
2625                sizeof(struct dasd_eckd_characteristics));
2626         info->confdata_size = min((unsigned long)private->conf_len,
2627                                   sizeof(info->configuration_data));
2628         memcpy(info->configuration_data, private->conf_data,
2629                info->confdata_size);
2630         return 0;
2631 }
2632
2633 /*
2634  * SECTION: ioctl functions for eckd devices.
2635  */
2636
2637 /*
2638  * Release device ioctl.
2639  * Buils a channel programm to releases a prior reserved
2640  * (see dasd_eckd_reserve) device.
2641  */
2642 static int
2643 dasd_eckd_release(struct dasd_device *device)
2644 {
2645         struct dasd_ccw_req *cqr;
2646         int rc;
2647         struct ccw1 *ccw;
2648
2649         if (!capable(CAP_SYS_ADMIN))
2650                 return -EACCES;
2651
2652         cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device);
2653         if (IS_ERR(cqr)) {
2654                 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
2655                             "Could not allocate initialization request");
2656                 return PTR_ERR(cqr);
2657         }
2658         ccw = cqr->cpaddr;
2659         ccw->cmd_code = DASD_ECKD_CCW_RELEASE;
2660         ccw->flags |= CCW_FLAG_SLI;
2661         ccw->count = 32;
2662         ccw->cda = (__u32)(addr_t) cqr->data;
2663         cqr->startdev = device;
2664         cqr->memdev = device;
2665         clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
2666         set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
2667         cqr->retries = 2;       /* set retry counter to enable basic ERP */
2668         cqr->expires = 2 * HZ;
2669         cqr->buildclk = get_clock();
2670         cqr->status = DASD_CQR_FILLED;
2671
2672         rc = dasd_sleep_on_immediatly(cqr);
2673
2674         dasd_sfree_request(cqr, cqr->memdev);
2675         return rc;
2676 }
2677
2678 /*
2679  * Reserve device ioctl.
2680  * Options are set to 'synchronous wait for interrupt' and
2681  * 'timeout the request'. This leads to a terminate IO if
2682  * the interrupt is outstanding for a certain time.
2683  */
2684 static int
2685 dasd_eckd_reserve(struct dasd_device *device)
2686 {
2687         struct dasd_ccw_req *cqr;
2688         int rc;
2689         struct ccw1 *ccw;
2690
2691         if (!capable(CAP_SYS_ADMIN))
2692                 return -EACCES;
2693
2694         cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device);
2695         if (IS_ERR(cqr)) {
2696                 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
2697                             "Could not allocate initialization request");
2698                 return PTR_ERR(cqr);
2699         }
2700         ccw = cqr->cpaddr;
2701         ccw->cmd_code = DASD_ECKD_CCW_RESERVE;
2702         ccw->flags |= CCW_FLAG_SLI;
2703         ccw->count = 32;
2704         ccw->cda = (__u32)(addr_t) cqr->data;
2705         cqr->startdev = device;
2706         cqr->memdev = device;
2707         clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
2708         set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
2709         cqr->retries = 2;       /* set retry counter to enable basic ERP */
2710         cqr->expires = 2 * HZ;
2711         cqr->buildclk = get_clock();
2712         cqr->status = DASD_CQR_FILLED;
2713
2714         rc = dasd_sleep_on_immediatly(cqr);
2715
2716         dasd_sfree_request(cqr, cqr->memdev);
2717         return rc;
2718 }
2719
2720 /*
2721  * Steal lock ioctl - unconditional reserve device.
2722  * Buils a channel programm to break a device's reservation.
2723  * (unconditional reserve)
2724  */
2725 static int
2726 dasd_eckd_steal_lock(struct dasd_device *device)
2727 {
2728         struct dasd_ccw_req *cqr;
2729         int rc;
2730         struct ccw1 *ccw;
2731
2732         if (!capable(CAP_SYS_ADMIN))
2733                 return -EACCES;
2734
2735         cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device);
2736         if (IS_ERR(cqr)) {
2737                 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
2738                             "Could not allocate initialization request");
2739                 return PTR_ERR(cqr);
2740         }
2741         ccw = cqr->cpaddr;
2742         ccw->cmd_code = DASD_ECKD_CCW_SLCK;
2743         ccw->flags |= CCW_FLAG_SLI;
2744         ccw->count = 32;
2745         ccw->cda = (__u32)(addr_t) cqr->data;
2746         cqr->startdev = device;
2747         cqr->memdev = device;
2748         clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
2749         set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
2750         cqr->retries = 2;       /* set retry counter to enable basic ERP */
2751         cqr->expires = 2 * HZ;
2752         cqr->buildclk = get_clock();
2753         cqr->status = DASD_CQR_FILLED;
2754
2755         rc = dasd_sleep_on_immediatly(cqr);
2756
2757         dasd_sfree_request(cqr, cqr->memdev);
2758         return rc;
2759 }
2760
2761 /*
2762  * Read performance statistics
2763  */
2764 static int
2765 dasd_eckd_performance(struct dasd_device *device, void __user *argp)
2766 {
2767         struct dasd_psf_prssd_data *prssdp;
2768         struct dasd_rssd_perf_stats_t *stats;
2769         struct dasd_ccw_req *cqr;
2770         struct ccw1 *ccw;
2771         int rc;
2772
2773         cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */  + 1 /* RSSD */,
2774                                    (sizeof(struct dasd_psf_prssd_data) +
2775                                     sizeof(struct dasd_rssd_perf_stats_t)),
2776                                    device);
2777         if (IS_ERR(cqr)) {
2778                 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
2779                             "Could not allocate initialization request");
2780                 return PTR_ERR(cqr);
2781         }
2782         cqr->startdev = device;
2783         cqr->memdev = device;
2784         cqr->retries = 0;
2785         clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
2786         cqr->expires = 10 * HZ;
2787
2788         /* Prepare for Read Subsystem Data */
2789         prssdp = (struct dasd_psf_prssd_data *) cqr->data;
2790         memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data));
2791         prssdp->order = PSF_ORDER_PRSSD;
2792         prssdp->suborder = 0x01;        /* Performance Statistics */
2793         prssdp->varies[1] = 0x01;       /* Perf Statistics for the Subsystem */
2794
2795         ccw = cqr->cpaddr;
2796         ccw->cmd_code = DASD_ECKD_CCW_PSF;
2797         ccw->count = sizeof(struct dasd_psf_prssd_data);
2798         ccw->flags |= CCW_FLAG_CC;
2799         ccw->cda = (__u32)(addr_t) prssdp;
2800
2801         /* Read Subsystem Data - Performance Statistics */
2802         stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1);
2803         memset(stats, 0, sizeof(struct dasd_rssd_perf_stats_t));
2804
2805         ccw++;
2806         ccw->cmd_code = DASD_ECKD_CCW_RSSD;
2807         ccw->count = sizeof(struct dasd_rssd_perf_stats_t);
2808         ccw->cda = (__u32)(addr_t) stats;
2809
2810         cqr->buildclk = get_clock();
2811         cqr->status = DASD_CQR_FILLED;
2812         rc = dasd_sleep_on(cqr);
2813         if (rc == 0) {
2814                 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
2815                 stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1);
2816                 if (copy_to_user(argp, stats,
2817                                  sizeof(struct dasd_rssd_perf_stats_t)))
2818                         rc = -EFAULT;
2819         }
2820         dasd_sfree_request(cqr, cqr->memdev);
2821         return rc;
2822 }
2823
2824 /*
2825  * Get attributes (cache operations)
2826  * Returnes the cache attributes used in Define Extend (DE).
2827  */
2828 static int
2829 dasd_eckd_get_attrib(struct dasd_device *device, void __user *argp)
2830 {
2831         struct dasd_eckd_private *private =
2832                 (struct dasd_eckd_private *)device->private;
2833         struct attrib_data_t attrib = private->attrib;
2834         int rc;
2835
2836         if (!capable(CAP_SYS_ADMIN))
2837                 return -EACCES;
2838         if (!argp)
2839                 return -EINVAL;
2840
2841         rc = 0;
2842         if (copy_to_user(argp, (long *) &attrib,
2843                          sizeof(struct attrib_data_t)))
2844                 rc = -EFAULT;
2845
2846         return rc;
2847 }
2848
2849 /*
2850  * Set attributes (cache operations)
2851  * Stores the attributes for cache operation to be used in Define Extend (DE).
2852  */
2853 static int
2854 dasd_eckd_set_attrib(struct dasd_device *device, void __user *argp)
2855 {
2856         struct dasd_eckd_private *private =
2857                 (struct dasd_eckd_private *)device->private;
2858         struct attrib_data_t attrib;
2859
2860         if (!capable(CAP_SYS_ADMIN))
2861                 return -EACCES;
2862         if (!argp)
2863                 return -EINVAL;
2864
2865         if (copy_from_user(&attrib, argp, sizeof(struct attrib_data_t)))
2866                 return -EFAULT;
2867         private->attrib = attrib;
2868
2869         dev_info(&device->cdev->dev,
2870                  "The DASD cache mode was set to %x (%i cylinder prestage)\n",
2871                  private->attrib.operation, private->attrib.nr_cyl);
2872         return 0;
2873 }
2874
2875 /*
2876  * Issue syscall I/O to EMC Symmetrix array.
2877  * CCWs are PSF and RSSD
2878  */
2879 static int dasd_symm_io(struct dasd_device *device, void __user *argp)
2880 {
2881         struct dasd_symmio_parms usrparm;
2882         char *psf_data, *rssd_result;
2883         struct dasd_ccw_req *cqr;
2884         struct ccw1 *ccw;
2885         char psf0, psf1;
2886         int rc;
2887
2888         if (!capable(CAP_SYS_ADMIN) && !capable(CAP_SYS_RAWIO))
2889                 return -EACCES;
2890         psf0 = psf1 = 0;
2891
2892         /* Copy parms from caller */
2893         rc = -EFAULT;
2894         if (copy_from_user(&usrparm, argp, sizeof(usrparm)))
2895                 goto out;
2896         if (is_compat_task() || sizeof(long) == 4) {
2897                 /* Make sure pointers are sane even on 31 bit. */
2898                 rc = -EINVAL;
2899                 if ((usrparm.psf_data >> 32) != 0)
2900                         goto out;
2901                 if ((usrparm.rssd_result >> 32) != 0)
2902                         goto out;
2903                 usrparm.psf_data &= 0x7fffffffULL;
2904                 usrparm.rssd_result &= 0x7fffffffULL;
2905         }
2906         /* alloc I/O data area */
2907         psf_data = kzalloc(usrparm.psf_data_len, GFP_KERNEL | GFP_DMA);
2908         rssd_result = kzalloc(usrparm.rssd_result_len, GFP_KERNEL | GFP_DMA);
2909         if (!psf_data || !rssd_result) {
2910                 rc = -ENOMEM;
2911                 goto out_free;
2912         }
2913
2914         /* get syscall header from user space */
2915         rc = -EFAULT;
2916         if (copy_from_user(psf_data,
2917                            (void __user *)(unsigned long) usrparm.psf_data,
2918                            usrparm.psf_data_len))
2919                 goto out_free;
2920         psf0 = psf_data[0];
2921         psf1 = psf_data[1];
2922
2923         /* setup CCWs for PSF + RSSD */
2924         cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 2 , 0, device);
2925         if (IS_ERR(cqr)) {
2926                 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
2927                         "Could not allocate initialization request");
2928                 rc = PTR_ERR(cqr);
2929                 goto out_free;
2930         }
2931
2932         cqr->startdev = device;
2933         cqr->memdev = device;
2934         cqr->retries = 3;
2935         cqr->expires = 10 * HZ;
2936         cqr->buildclk = get_clock();
2937         cqr->status = DASD_CQR_FILLED;
2938
2939         /* Build the ccws */
2940         ccw = cqr->cpaddr;
2941
2942         /* PSF ccw */
2943         ccw->cmd_code = DASD_ECKD_CCW_PSF;
2944         ccw->count = usrparm.psf_data_len;
2945         ccw->flags |= CCW_FLAG_CC;
2946         ccw->cda = (__u32)(addr_t) psf_data;
2947
2948         ccw++;
2949
2950         /* RSSD ccw  */
2951         ccw->cmd_code = DASD_ECKD_CCW_RSSD;
2952         ccw->count = usrparm.rssd_result_len;
2953         ccw->flags = CCW_FLAG_SLI ;
2954         ccw->cda = (__u32)(addr_t) rssd_result;
2955
2956         rc = dasd_sleep_on(cqr);
2957         if (rc)
2958                 goto out_sfree;
2959
2960         rc = -EFAULT;
2961         if (copy_to_user((void __user *)(unsigned long) usrparm.rssd_result,
2962                            rssd_result, usrparm.rssd_result_len))
2963                 goto out_sfree;
2964         rc = 0;
2965
2966 out_sfree:
2967         dasd_sfree_request(cqr, cqr->memdev);
2968 out_free:
2969         kfree(rssd_result);
2970         kfree(psf_data);
2971 out:
2972         DBF_DEV_EVENT(DBF_WARNING, device,
2973                       "Symmetrix ioctl (0x%02x 0x%02x): rc=%d",
2974                       (int) psf0, (int) psf1, rc);
2975         return rc;
2976 }
2977
2978 static int
2979 dasd_eckd_ioctl(struct dasd_block *block, unsigned int cmd, void __user *argp)
2980 {
2981         struct dasd_device *device = block->base;
2982
2983         switch (cmd) {
2984         case BIODASDGATTR:
2985                 return dasd_eckd_get_attrib(device, argp);
2986         case BIODASDSATTR:
2987                 return dasd_eckd_set_attrib(device, argp);
2988         case BIODASDPSRD:
2989                 return dasd_eckd_performance(device, argp);
2990         case BIODASDRLSE:
2991                 return dasd_eckd_release(device);
2992         case BIODASDRSRV:
2993                 return dasd_eckd_reserve(device);
2994         case BIODASDSLCK:
2995                 return dasd_eckd_steal_lock(device);
2996         case BIODASDSYMMIO:
2997                 return dasd_symm_io(device, argp);
2998         default:
2999                 return -ENOIOCTLCMD;
3000         }
3001 }
3002
3003 /*
3004  * Dump the range of CCWs into 'page' buffer
3005  * and return number of printed chars.
3006  */
3007 static int
3008 dasd_eckd_dump_ccw_range(struct ccw1 *from, struct ccw1 *to, char *page)
3009 {
3010         int len, count;
3011         char *datap;
3012
3013         len = 0;
3014         while (from <= to) {
3015                 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3016                                " CCW %p: %08X %08X DAT:",
3017                                from, ((int *) from)[0], ((int *) from)[1]);
3018
3019                 /* get pointer to data (consider IDALs) */
3020                 if (from->flags & CCW_FLAG_IDA)
3021                         datap = (char *) *((addr_t *) (addr_t) from->cda);
3022                 else
3023                         datap = (char *) ((addr_t) from->cda);
3024
3025                 /* dump data (max 32 bytes) */
3026                 for (count = 0; count < from->count && count < 32; count++) {
3027                         if (count % 8 == 0) len += sprintf(page + len, " ");
3028                         if (count % 4 == 0) len += sprintf(page + len, " ");
3029                         len += sprintf(page + len, "%02x", datap[count]);
3030                 }
3031                 len += sprintf(page + len, "\n");
3032                 from++;
3033         }
3034         return len;
3035 }
3036
3037 static void
3038 dasd_eckd_dump_sense_dbf(struct dasd_device *device, struct irb *irb,
3039                          char *reason)
3040 {
3041         u64 *sense;
3042
3043         sense = (u64 *) dasd_get_sense(irb);
3044         if (sense) {
3045                 DBF_DEV_EVENT(DBF_EMERG, device,
3046                               "%s: %s %02x%02x%02x %016llx %016llx %016llx "
3047                               "%016llx", reason,
3048                               scsw_is_tm(&irb->scsw) ? "t" : "c",
3049                               scsw_cc(&irb->scsw), scsw_cstat(&irb->scsw),
3050                               scsw_dstat(&irb->scsw), sense[0], sense[1],
3051                               sense[2], sense[3]);
3052         } else {
3053                 DBF_DEV_EVENT(DBF_EMERG, device, "%s",
3054                               "SORRY - NO VALID SENSE AVAILABLE\n");
3055         }
3056 }
3057
3058 /*
3059  * Print sense data and related channel program.
3060  * Parts are printed because printk buffer is only 1024 bytes.
3061  */
3062 static void dasd_eckd_dump_sense_ccw(struct dasd_device *device,
3063                                  struct dasd_ccw_req *req, struct irb *irb)
3064 {
3065         char *page;
3066         struct ccw1 *first, *last, *fail, *from, *to;
3067         int len, sl, sct;
3068
3069         page = (char *) get_zeroed_page(GFP_ATOMIC);
3070         if (page == NULL) {
3071                 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
3072                               "No memory to dump sense data\n");
3073                 return;
3074         }
3075         /* dump the sense data */
3076         len = sprintf(page,  KERN_ERR PRINTK_HEADER
3077                       " I/O status report for device %s:\n",
3078                       dev_name(&device->cdev->dev));
3079         len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3080                        " in req: %p CS: 0x%02X DS: 0x%02X CC: 0x%02X RC: %d\n",
3081                        req, scsw_cstat(&irb->scsw), scsw_dstat(&irb->scsw),
3082                        scsw_cc(&irb->scsw), req ? req->intrc : 0);
3083         len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3084                        " device %s: Failing CCW: %p\n",
3085                        dev_name(&device->cdev->dev),
3086                        (void *) (addr_t) irb->scsw.cmd.cpa);
3087         if (irb->esw.esw0.erw.cons) {
3088                 for (sl = 0; sl < 4; sl++) {
3089                         len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3090                                        " Sense(hex) %2d-%2d:",
3091                                        (8 * sl), ((8 * sl) + 7));
3092
3093                         for (sct = 0; sct < 8; sct++) {
3094                                 len += sprintf(page + len, " %02x",
3095                                                irb->ecw[8 * sl + sct]);
3096                         }
3097                         len += sprintf(page + len, "\n");
3098                 }
3099
3100                 if (irb->ecw[27] & DASD_SENSE_BIT_0) {
3101                         /* 24 Byte Sense Data */
3102                         sprintf(page + len, KERN_ERR PRINTK_HEADER
3103                                 " 24 Byte: %x MSG %x, "
3104                                 "%s MSGb to SYSOP\n",
3105                                 irb->ecw[7] >> 4, irb->ecw[7] & 0x0f,
3106                                 irb->ecw[1] & 0x10 ? "" : "no");
3107                 } else {
3108                         /* 32 Byte Sense Data */
3109                         sprintf(page + len, KERN_ERR PRINTK_HEADER
3110                                 " 32 Byte: Format: %x "
3111                                 "Exception class %x\n",
3112                                 irb->ecw[6] & 0x0f, irb->ecw[22] >> 4);
3113                 }
3114         } else {
3115                 sprintf(page + len, KERN_ERR PRINTK_HEADER
3116                         " SORRY - NO VALID SENSE AVAILABLE\n");
3117         }
3118         printk("%s", page);
3119
3120         if (req) {
3121                 /* req == NULL for unsolicited interrupts */
3122                 /* dump the Channel Program (max 140 Bytes per line) */
3123                 /* Count CCW and print first CCWs (maximum 1024 % 140 = 7) */
3124                 first = req->cpaddr;
3125                 for (last = first; last->flags & (CCW_FLAG_CC | CCW_FLAG_DC); last++);
3126                 to = min(first + 6, last);
3127                 len = sprintf(page,  KERN_ERR PRINTK_HEADER
3128                               " Related CP in req: %p\n", req);
3129                 dasd_eckd_dump_ccw_range(first, to, page + len);
3130                 printk("%s", page);
3131
3132                 /* print failing CCW area (maximum 4) */
3133                 /* scsw->cda is either valid or zero  */
3134                 len = 0;
3135                 from = ++to;
3136                 fail = (struct ccw1 *)(addr_t)
3137                                 irb->scsw.cmd.cpa; /* failing CCW */
3138                 if (from <  fail - 2) {
3139                         from = fail - 2;     /* there is a gap - print header */
3140                         len += sprintf(page, KERN_ERR PRINTK_HEADER "......\n");
3141                 }
3142                 to = min(fail + 1, last);
3143                 len += dasd_eckd_dump_ccw_range(from, to, page + len);
3144
3145                 /* print last CCWs (maximum 2) */
3146                 from = max(from, ++to);
3147                 if (from < last - 1) {
3148                         from = last - 1;     /* there is a gap - print header */
3149                         len += sprintf(page + len, KERN_ERR PRINTK_HEADER "......\n");
3150                 }
3151                 len += dasd_eckd_dump_ccw_range(from, last, page + len);
3152                 if (len > 0)
3153                         printk("%s", page);
3154         }
3155         free_page((unsigned long) page);
3156 }
3157
3158
3159 /*
3160  * Print sense data from a tcw.
3161  */
3162 static void dasd_eckd_dump_sense_tcw(struct dasd_device *device,
3163                                  struct dasd_ccw_req *req, struct irb *irb)
3164 {
3165         char *page;
3166         int len, sl, sct, residual;
3167
3168         struct tsb *tsb;
3169         u8 *sense;
3170
3171
3172         page = (char *) get_zeroed_page(GFP_ATOMIC);
3173         if (page == NULL) {
3174                 DBF_DEV_EVENT(DBF_WARNING, device, " %s",
3175                             "No memory to dump sense data");
3176                 return;
3177         }
3178         /* dump the sense data */
3179         len = sprintf(page,  KERN_ERR PRINTK_HEADER
3180                       " I/O status report for device %s:\n",
3181                       dev_name(&device->cdev->dev));
3182         len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3183                        " in req: %p CS: 0x%02X DS: 0x%02X CC: 0x%02X RC: %d "
3184                        "fcxs: 0x%02X schxs: 0x%02X\n", req,
3185                        scsw_cstat(&irb->scsw), scsw_dstat(&irb->scsw),
3186                        scsw_cc(&irb->scsw), req->intrc,
3187                        irb->scsw.tm.fcxs, irb->scsw.tm.schxs);
3188         len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3189                        " device %s: Failing TCW: %p\n",
3190                        dev_name(&device->cdev->dev),
3191                        (void *) (addr_t) irb->scsw.tm.tcw);
3192
3193         tsb = NULL;
3194         sense = NULL;
3195         if (irb->scsw.tm.tcw && (irb->scsw.tm.fcxs == 0x01))
3196                 tsb = tcw_get_tsb(
3197                         (struct tcw *)(unsigned long)irb->scsw.tm.tcw);
3198
3199         if (tsb) {
3200                 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3201                                " tsb->length %d\n", tsb->length);
3202                 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3203                                " tsb->flags %x\n", tsb->flags);
3204                 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3205                                " tsb->dcw_offset %d\n", tsb->dcw_offset);
3206                 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3207                                " tsb->count %d\n", tsb->count);
3208                 residual = tsb->count - 28;
3209                 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3210                                " residual %d\n", residual);
3211
3212                 switch (tsb->flags & 0x07) {
3213                 case 1: /* tsa_iostat */
3214                         len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3215                                " tsb->tsa.iostat.dev_time %d\n",
3216                                        tsb->tsa.iostat.dev_time);
3217                         len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3218                                " tsb->tsa.iostat.def_time %d\n",
3219                                        tsb->tsa.iostat.def_time);
3220                         len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3221                                " tsb->tsa.iostat.queue_time %d\n",
3222                                        tsb->tsa.iostat.queue_time);
3223                         len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3224                                " tsb->tsa.iostat.dev_busy_time %d\n",
3225                                        tsb->tsa.iostat.dev_busy_time);
3226                         len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3227                                " tsb->tsa.iostat.dev_act_time %d\n",
3228                                        tsb->tsa.iostat.dev_act_time);
3229                         sense = tsb->tsa.iostat.sense;
3230                         break;
3231                 case 2: /* ts_ddpc */
3232                         len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3233                                " tsb->tsa.ddpc.rc %d\n", tsb->tsa.ddpc.rc);
3234                         len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3235                                " tsb->tsa.ddpc.rcq:  ");
3236                         for (sl = 0; sl < 16; sl++) {
3237                                 for (sct = 0; sct < 8; sct++) {
3238                                         len += sprintf(page + len, " %02x",
3239                                                        tsb->tsa.ddpc.rcq[sl]);
3240                                 }
3241                                 len += sprintf(page + len, "\n");
3242                         }
3243                         sense = tsb->tsa.ddpc.sense;
3244                         break;
3245                 case 3: /* tsa_intrg */
3246                         len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3247                                       " tsb->tsa.intrg.: not supportet yet \n");
3248                         break;
3249                 }
3250
3251                 if (sense) {
3252                         for (sl = 0; sl < 4; sl++) {
3253                                 len += sprintf(page + len,
3254                                                KERN_ERR PRINTK_HEADER
3255                                                " Sense(hex) %2d-%2d:",
3256                                                (8 * sl), ((8 * sl) + 7));
3257                                 for (sct = 0; sct < 8; sct++) {
3258                                         len += sprintf(page + len, " %02x",
3259                                                        sense[8 * sl + sct]);
3260                                 }
3261                                 len += sprintf(page + len, "\n");
3262                         }
3263
3264                         if (sense[27] & DASD_SENSE_BIT_0) {
3265                                 /* 24 Byte Sense Data */
3266                                 sprintf(page + len, KERN_ERR PRINTK_HEADER
3267                                         " 24 Byte: %x MSG %x, "
3268                                         "%s MSGb to SYSOP\n",
3269                                         sense[7] >> 4, sense[7] & 0x0f,
3270                                         sense[1] & 0x10 ? "" : "no");
3271                         } else {
3272                                 /* 32 Byte Sense Data */
3273                                 sprintf(page + len, KERN_ERR PRINTK_HEADER
3274                                         " 32 Byte: Format: %x "
3275                                         "Exception class %x\n",
3276                                         sense[6] & 0x0f, sense[22] >> 4);
3277                         }
3278                 } else {
3279                         sprintf(page + len, KERN_ERR PRINTK_HEADER
3280                                 " SORRY - NO VALID SENSE AVAILABLE\n");
3281                 }
3282         } else {
3283                 sprintf(page + len, KERN_ERR PRINTK_HEADER
3284                         " SORRY - NO TSB DATA AVAILABLE\n");
3285         }
3286         printk("%s", page);
3287         free_page((unsigned long) page);
3288 }
3289
3290 static void dasd_eckd_dump_sense(struct dasd_device *device,
3291                                  struct dasd_ccw_req *req, struct irb *irb)
3292 {
3293         if (req && scsw_is_tm(&req->irb.scsw))
3294                 dasd_eckd_dump_sense_tcw(device, req, irb);
3295         else
3296                 dasd_eckd_dump_sense_ccw(device, req, irb);
3297 }
3298
3299 static int dasd_eckd_pm_freeze(struct dasd_device *device)
3300 {
3301         /*
3302          * the device should be disconnected from our LCU structure
3303          * on restore we will reconnect it and reread LCU specific
3304          * information like PAV support that might have changed
3305          */
3306         dasd_alias_remove_device(device);
3307         dasd_alias_disconnect_device_from_lcu(device);
3308
3309         return 0;
3310 }
3311
3312 static int dasd_eckd_restore_device(struct dasd_device *device)
3313 {
3314         struct dasd_eckd_private *private;
3315         struct dasd_eckd_characteristics temp_rdc_data;
3316         int is_known, rc;
3317         struct dasd_uid temp_uid;
3318         unsigned long flags;
3319
3320         private = (struct dasd_eckd_private *) device->private;
3321
3322         /* Read Configuration Data */
3323         rc = dasd_eckd_read_conf(device);
3324         if (rc)
3325                 goto out_err;
3326
3327         dasd_eckd_get_uid(device, &temp_uid);
3328         /* Generate device unique id */
3329         rc = dasd_eckd_generate_uid(device);
3330         spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
3331         if (memcmp(&private->uid, &temp_uid, sizeof(struct dasd_uid)) != 0)
3332                 dev_err(&device->cdev->dev, "The UID of the DASD has "
3333                         "changed\n");
3334         spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
3335         if (rc)
3336                 goto out_err;
3337
3338         /* register lcu with alias handling, enable PAV if this is a new lcu */
3339         is_known = dasd_alias_make_device_known_to_lcu(device);
3340         if (is_known < 0)
3341                 return is_known;
3342         if (!is_known) {
3343                 dasd_eckd_validate_server(device);
3344                 dasd_alias_lcu_setup_complete(device);
3345         } else
3346                 dasd_alias_wait_for_lcu_setup(device);
3347
3348         /* RE-Read Configuration Data */
3349         rc = dasd_eckd_read_conf(device);
3350         if (rc)
3351                 goto out_err;
3352
3353         /* Read Feature Codes */
3354         dasd_eckd_read_features(device);
3355
3356         /* Read Device Characteristics */
3357         rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC,
3358                                          &temp_rdc_data, 64);
3359         if (rc) {
3360                 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
3361                                 "Read device characteristic failed, rc=%d", rc);
3362                 goto out_err;
3363         }
3364         spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
3365         memcpy(&private->rdc_data, &temp_rdc_data, sizeof(temp_rdc_data));
3366         spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
3367
3368         /* add device to alias management */
3369         dasd_alias_add_device(device);
3370
3371         return 0;
3372
3373 out_err:
3374         return -1;
3375 }
3376
3377 static int dasd_eckd_reload_device(struct dasd_device *device)
3378 {
3379         struct dasd_eckd_private *private;
3380         int rc, old_base;
3381         char print_uid[60];
3382         struct dasd_uid uid;
3383         unsigned long flags;
3384
3385         private = (struct dasd_eckd_private *) device->private;
3386
3387         spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
3388         old_base = private->uid.base_unit_addr;
3389         spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
3390
3391         /* Read Configuration Data */
3392         rc = dasd_eckd_read_conf(device);
3393         if (rc)
3394                 goto out_err;
3395
3396         rc = dasd_eckd_generate_uid(device);
3397         if (rc)
3398                 goto out_err;
3399         /*
3400          * update unit address configuration and
3401          * add device to alias management
3402          */
3403         dasd_alias_update_add_device(device);
3404
3405         dasd_eckd_get_uid(device, &uid);
3406
3407         if (old_base != uid.base_unit_addr) {
3408                 if (strlen(uid.vduit) > 0)
3409                         snprintf(print_uid, sizeof(print_uid),
3410                                  "%s.%s.%04x.%02x.%s", uid.vendor, uid.serial,
3411                                  uid.ssid, uid.base_unit_addr, uid.vduit);
3412                 else
3413                         snprintf(print_uid, sizeof(print_uid),
3414                                  "%s.%s.%04x.%02x", uid.vendor, uid.serial,
3415                                  uid.ssid, uid.base_unit_addr);
3416
3417                 dev_info(&device->cdev->dev,
3418                          "An Alias device was reassigned to a new base device "
3419                          "with UID: %s\n", print_uid);
3420         }
3421         return 0;
3422
3423 out_err:
3424         return -1;
3425 }
3426
3427 static struct ccw_driver dasd_eckd_driver = {
3428         .name        = "dasd-eckd",
3429         .owner       = THIS_MODULE,
3430         .ids         = dasd_eckd_ids,
3431         .probe       = dasd_eckd_probe,
3432         .remove      = dasd_generic_remove,
3433         .set_offline = dasd_generic_set_offline,
3434         .set_online  = dasd_eckd_set_online,
3435         .notify      = dasd_generic_notify,
3436         .freeze      = dasd_generic_pm_freeze,
3437         .thaw        = dasd_generic_restore_device,
3438         .restore     = dasd_generic_restore_device,
3439         .uc_handler  = dasd_generic_uc_handler,
3440 };
3441
3442 /*
3443  * max_blocks is dependent on the amount of storage that is available
3444  * in the static io buffer for each device. Currently each device has
3445  * 8192 bytes (=2 pages). For 64 bit one dasd_mchunkt_t structure has
3446  * 24 bytes, the struct dasd_ccw_req has 136 bytes and each block can use
3447  * up to 16 bytes (8 for the ccw and 8 for the idal pointer). In
3448  * addition we have one define extent ccw + 16 bytes of data and one
3449  * locate record ccw + 16 bytes of data. That makes:
3450  * (8192 - 24 - 136 - 8 - 16 - 8 - 16) / 16 = 499 blocks at maximum.
3451  * We want to fit two into the available memory so that we can immediately
3452  * start the next request if one finishes off. That makes 249.5 blocks
3453  * for one request. Give a little safety and the result is 240.
3454  */
3455 static struct dasd_discipline dasd_eckd_discipline = {
3456         .owner = THIS_MODULE,
3457         .name = "ECKD",
3458         .ebcname = "ECKD",
3459         .max_blocks = 240,
3460         .check_device = dasd_eckd_check_characteristics,
3461         .uncheck_device = dasd_eckd_uncheck_device,
3462         .do_analysis = dasd_eckd_do_analysis,
3463         .ready_to_online = dasd_eckd_ready_to_online,
3464         .online_to_ready = dasd_eckd_online_to_ready,
3465         .fill_geometry = dasd_eckd_fill_geometry,
3466         .start_IO = dasd_start_IO,
3467         .term_IO = dasd_term_IO,
3468         .handle_terminated_request = dasd_eckd_handle_terminated_request,
3469         .format_device = dasd_eckd_format_device,
3470         .erp_action = dasd_eckd_erp_action,
3471         .erp_postaction = dasd_eckd_erp_postaction,
3472         .handle_unsolicited_interrupt = dasd_eckd_handle_unsolicited_interrupt,
3473         .build_cp = dasd_eckd_build_alias_cp,
3474         .free_cp = dasd_eckd_free_alias_cp,
3475         .dump_sense = dasd_eckd_dump_sense,
3476         .dump_sense_dbf = dasd_eckd_dump_sense_dbf,
3477         .fill_info = dasd_eckd_fill_info,
3478         .ioctl = dasd_eckd_ioctl,
3479         .freeze = dasd_eckd_pm_freeze,
3480         .restore = dasd_eckd_restore_device,
3481         .reload = dasd_eckd_reload_device,
3482         .get_uid = dasd_eckd_get_uid,
3483 };
3484
3485 static int __init
3486 dasd_eckd_init(void)
3487 {
3488         int ret;
3489
3490         ASCEBC(dasd_eckd_discipline.ebcname, 4);
3491         ret = ccw_driver_register(&dasd_eckd_driver);
3492         if (!ret)
3493                 wait_for_device_probe();
3494
3495         return ret;
3496 }
3497
3498 static void __exit
3499 dasd_eckd_cleanup(void)
3500 {
3501         ccw_driver_unregister(&dasd_eckd_driver);
3502 }
3503
3504 module_init(dasd_eckd_init);
3505 module_exit(dasd_eckd_cleanup);