drivers/memstick/core/mspro_block.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  *  Sony MemoryStick Pro storage support
   4  *
   5  *  Copyright (C) 2007 Alex Dubov <oakad@yahoo.com>
   6  *
   7  * Special thanks to Carlos Corbacho for providing various MemoryStick cards
   8  * that made this driver possible.
   9  */
  10
  11 #include <linux/blk-mq.h>
  12 #include <linux/idr.h>
  13 #include <linux/hdreg.h>
  14 #include <linux/kthread.h>
  15 #include <linux/delay.h>
  16 #include <linux/slab.h>
  17 #include <linux/mutex.h>
  18 #include <linux/memstick.h>
  19 #include <linux/module.h>
  20
  21 #define DRIVER_NAME "mspro_block"
  22
  23 static int major;
  24 module_param(major, int, 0644);
  25
  26 #define MSPRO_BLOCK_MAX_SEGS  32
  27 #define MSPRO_BLOCK_MAX_PAGES ((2 << 16) - 1)
  28
  29 #define MSPRO_BLOCK_SIGNATURE        0xa5c3
  30 #define MSPRO_BLOCK_MAX_ATTRIBUTES   41
  31
  32 #define MSPRO_BLOCK_PART_SHIFT 3
  33
  34 enum {
  35         MSPRO_BLOCK_ID_SYSINFO         = 0x10,
  36         MSPRO_BLOCK_ID_MODELNAME       = 0x15,
  37         MSPRO_BLOCK_ID_MBR             = 0x20,
  38         MSPRO_BLOCK_ID_PBR16           = 0x21,
  39         MSPRO_BLOCK_ID_PBR32           = 0x22,
  40         MSPRO_BLOCK_ID_SPECFILEVALUES1 = 0x25,
  41         MSPRO_BLOCK_ID_SPECFILEVALUES2 = 0x26,
  42         MSPRO_BLOCK_ID_DEVINFO         = 0x30
  43 };
  44
  45 struct mspro_sys_attr {
  46         size_t                  size;
  47         void                    *data;
  48         unsigned char           id;
  49         char                    name[32];
  50         struct device_attribute dev_attr;
  51 };
  52
  53 struct mspro_attr_entry {
  54         __be32 address;
  55         __be32 size;
  56         unsigned char id;
  57         unsigned char reserved[3];
  58 } __attribute__((packed));
  59
  60 struct mspro_attribute {
  61         __be16 signature;
  62         unsigned short          version;
  63         unsigned char           count;
  64         unsigned char           reserved[11];
  65         struct mspro_attr_entry entries[];
  66 } __attribute__((packed));
  67
  68 struct mspro_sys_info {
  69         unsigned char  class;
  70         unsigned char  reserved0;
  71         __be16 block_size;
  72         __be16 block_count;
  73         __be16 user_block_count;
  74         __be16 page_size;
  75         unsigned char  reserved1[2];
  76         unsigned char  assembly_date[8];
  77         __be32 serial_number;
  78         unsigned char  assembly_maker_code;
  79         unsigned char  assembly_model_code[3];
  80         __be16 memory_maker_code;
  81         __be16 memory_model_code;
  82         unsigned char  reserved2[4];
  83         unsigned char  vcc;
  84         unsigned char  vpp;
  85         __be16 controller_number;
  86         __be16 controller_function;
  87         __be16 start_sector;
  88         __be16 unit_size;
  89         unsigned char  ms_sub_class;
  90         unsigned char  reserved3[4];
  91         unsigned char  interface_type;
  92         __be16 controller_code;
  93         unsigned char  format_type;
  94         unsigned char  reserved4;
  95         unsigned char  device_type;
  96         unsigned char  reserved5[7];
  97         unsigned char  mspro_id[16];
  98         unsigned char  reserved6[16];
  99 } __attribute__((packed));
 100
 101 struct mspro_mbr {
 102         unsigned char boot_partition;
 103         unsigned char start_head;
 104         unsigned char start_sector;
 105         unsigned char start_cylinder;
 106         unsigned char partition_type;
 107         unsigned char end_head;
 108         unsigned char end_sector;
 109         unsigned char end_cylinder;
 110         unsigned int  start_sectors;
 111         unsigned int  sectors_per_partition;
 112 } __attribute__((packed));
 113
 114 struct mspro_specfile {
 115         char           name[8];
 116         char           ext[3];
 117         unsigned char  attr;
 118         unsigned char  reserved[10];
 119         unsigned short time;
 120         unsigned short date;
 121         unsigned short cluster;
 122         unsigned int   size;
 123 } __attribute__((packed));
 124
 125 struct mspro_devinfo {
 126         __be16 cylinders;
 127         __be16 heads;
 128         __be16 bytes_per_track;
 129         __be16 bytes_per_sector;
 130         __be16 sectors_per_track;
 131         unsigned char  reserved[6];
 132 } __attribute__((packed));
 133
 134 struct mspro_block_data {
 135         struct memstick_dev   *card;
 136         unsigned int          usage_count;
 137         unsigned int          caps;
 138         struct gendisk        *disk;
 139         struct request_queue  *queue;
 140         struct request        *block_req;
 141         struct blk_mq_tag_set tag_set;
 142         spinlock_t            q_lock;
 143
 144         unsigned short        page_size;
 145         unsigned short        cylinders;
 146         unsigned short        heads;
 147         unsigned short        sectors_per_track;
 148
 149         unsigned char         system;
 150         unsigned char         read_only:1,
 151                               eject:1,
 152                               data_dir:1,
 153                               active:1;
 154         unsigned char         transfer_cmd;
 155
 156         int                   (*mrq_handler)(struct memstick_dev *card,
 157                                              struct memstick_request **mrq);
 158
 159
 160         /* Default request setup function for data access method preferred by
 161          * this host instance.
 162          */
 163         void                  (*setup_transfer)(struct memstick_dev *card,
 164                                                 u64 offset, size_t length);
 165
 166         struct attribute_group attr_group;
 167
 168         struct scatterlist    req_sg[MSPRO_BLOCK_MAX_SEGS];
 169         unsigned int          seg_count;
 170         unsigned int          current_seg;
 171         unsigned int          current_page;
 172 };
 173
 174 static DEFINE_IDR(mspro_block_disk_idr);
 175 static DEFINE_MUTEX(mspro_block_disk_lock);
 176
 177 static int mspro_block_complete_req(struct memstick_dev *card, int error);
 178
 179 /*** Block device ***/
 180
 181 static int mspro_block_bd_open(struct block_device *bdev, fmode_t mode)
 182 {
 183         struct gendisk *disk = bdev->bd_disk;
 184         struct mspro_block_data *msb = disk->private_data;
 185         int rc = -ENXIO;
 186
 187         mutex_lock(&mspro_block_disk_lock);
 188
 189         if (msb && msb->card) {
 190                 msb->usage_count++;
 191                 if ((mode & FMODE_WRITE) && msb->read_only)
 192                         rc = -EROFS;
 193                 else
 194                         rc = 0;
 195         }
 196
 197         mutex_unlock(&mspro_block_disk_lock);
 198
 199         return rc;
 200 }
 201
 202
 203 static void mspro_block_disk_release(struct gendisk *disk)
 204 {
 205         struct mspro_block_data *msb = disk->private_data;
 206         int disk_id = MINOR(disk_devt(disk)) >> MSPRO_BLOCK_PART_SHIFT;
 207
 208         mutex_lock(&mspro_block_disk_lock);
 209
 210         if (msb) {
 211                 if (msb->usage_count)
 212                         msb->usage_count--;
 213
 214                 if (!msb->usage_count) {
 215                         kfree(msb);
 216                         disk->private_data = NULL;
 217                         idr_remove(&mspro_block_disk_idr, disk_id);
 218                         put_disk(disk);
 219                 }
 220         }
 221
 222         mutex_unlock(&mspro_block_disk_lock);
 223 }
 224
 225 static void mspro_block_bd_release(struct gendisk *disk, fmode_t mode)
 226 {
 227         mspro_block_disk_release(disk);
 228 }
 229
 230 static int mspro_block_bd_getgeo(struct block_device *bdev,
 231                                  struct hd_geometry *geo)
 232 {
 233         struct mspro_block_data *msb = bdev->bd_disk->private_data;
 234
 235         geo->heads = msb->heads;
 236         geo->sectors = msb->sectors_per_track;
 237         geo->cylinders = msb->cylinders;
 238
 239         return 0;
 240 }
 241
 242 static const struct block_device_operations ms_block_bdops = {
 243         .open    = mspro_block_bd_open,
 244         .release = mspro_block_bd_release,
 245         .getgeo  = mspro_block_bd_getgeo,
 246         .owner   = THIS_MODULE
 247 };
 248
 249 /*** Information ***/
 250
 251 static struct mspro_sys_attr *mspro_from_sysfs_attr(struct attribute *attr)
 252 {
 253         struct device_attribute *dev_attr
 254                 = container_of(attr, struct device_attribute, attr);
 255         return container_of(dev_attr, struct mspro_sys_attr, dev_attr);
 256 }
 257
 258 static const char *mspro_block_attr_name(unsigned char tag)
 259 {
 260         switch (tag) {
 261         case MSPRO_BLOCK_ID_SYSINFO:
 262                 return "attr_sysinfo";
 263         case MSPRO_BLOCK_ID_MODELNAME:
 264                 return "attr_modelname";
 265         case MSPRO_BLOCK_ID_MBR:
 266                 return "attr_mbr";
 267         case MSPRO_BLOCK_ID_PBR16:
 268                 return "attr_pbr16";
 269         case MSPRO_BLOCK_ID_PBR32:
 270                 return "attr_pbr32";
 271         case MSPRO_BLOCK_ID_SPECFILEVALUES1:
 272                 return "attr_specfilevalues1";
 273         case MSPRO_BLOCK_ID_SPECFILEVALUES2:
 274                 return "attr_specfilevalues2";
 275         case MSPRO_BLOCK_ID_DEVINFO:
 276                 return "attr_devinfo";
 277         default:
 278                 return NULL;
 279         };
 280 }
 281
 282 typedef ssize_t (*sysfs_show_t)(struct device *dev,
 283                                 struct device_attribute *attr,
 284                                 char *buffer);
 285
 286 static ssize_t mspro_block_attr_show_default(struct device *dev,
 287                                              struct device_attribute *attr,
 288                                              char *buffer)
 289 {
 290         struct mspro_sys_attr *s_attr = container_of(attr,
 291                                                      struct mspro_sys_attr,
 292                                                      dev_attr);
 293
 294         ssize_t cnt, rc = 0;
 295
 296         for (cnt = 0; cnt < s_attr->size; cnt++) {
 297                 if (cnt && !(cnt % 16)) {
 298                         if (PAGE_SIZE - rc)
 299                                 buffer[rc++] = '\n';
 300                 }
 301
 302                 rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "%02x ",
 303                                 ((unsigned char *)s_attr->data)[cnt]);
 304         }
 305         return rc;
 306 }
 307
 308 static ssize_t mspro_block_attr_show_sysinfo(struct device *dev,
 309                                              struct device_attribute *attr,
 310                                              char *buffer)
 311 {
 312         struct mspro_sys_attr *x_attr = container_of(attr,
 313                                                      struct mspro_sys_attr,
 314                                                      dev_attr);
 315         struct mspro_sys_info *x_sys = x_attr->data;
 316         ssize_t rc = 0;
 317         int date_tz = 0, date_tz_f = 0;
 318
 319         if (x_sys->assembly_date[0] > 0x80U) {
 320                 date_tz = (~x_sys->assembly_date[0]) + 1;
 321                 date_tz_f = date_tz & 3;
 322                 date_tz >>= 2;
 323                 date_tz = -date_tz;
 324                 date_tz_f *= 15;
 325         } else if (x_sys->assembly_date[0] < 0x80U) {
 326                 date_tz = x_sys->assembly_date[0];
 327                 date_tz_f = date_tz & 3;
 328                 date_tz >>= 2;
 329                 date_tz_f *= 15;
 330         }
 331
 332         rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "class: %x\n",
 333                         x_sys->class);
 334         rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "block size: %x\n",
 335                         be16_to_cpu(x_sys->block_size));
 336         rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "block count: %x\n",
 337                         be16_to_cpu(x_sys->block_count));
 338         rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "user block count: %x\n",
 339                         be16_to_cpu(x_sys->user_block_count));
 340         rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "page size: %x\n",
 341                         be16_to_cpu(x_sys->page_size));
 342         rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "assembly date: "
 343                         "GMT%+d:%d %04u-%02u-%02u %02u:%02u:%02u\n",
 344                         date_tz, date_tz_f,
 345                         be16_to_cpup((__be16 *)&x_sys->assembly_date[1]),
 346                         x_sys->assembly_date[3], x_sys->assembly_date[4],
 347                         x_sys->assembly_date[5], x_sys->assembly_date[6],
 348                         x_sys->assembly_date[7]);
 349         rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "serial number: %x\n",
 350                         be32_to_cpu(x_sys->serial_number));
 351         rc += scnprintf(buffer + rc, PAGE_SIZE - rc,
 352                         "assembly maker code: %x\n",
 353                         x_sys->assembly_maker_code);
 354         rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "assembly model code: "
 355                         "%02x%02x%02x\n", x_sys->assembly_model_code[0],
 356                         x_sys->assembly_model_code[1],
 357                         x_sys->assembly_model_code[2]);
 358         rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "memory maker code: %x\n",
 359                         be16_to_cpu(x_sys->memory_maker_code));
 360         rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "memory model code: %x\n",
 361                         be16_to_cpu(x_sys->memory_model_code));
 362         rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "vcc: %x\n",
 363                         x_sys->vcc);
 364         rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "vpp: %x\n",
 365                         x_sys->vpp);
 366         rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "controller number: %x\n",
 367                         be16_to_cpu(x_sys->controller_number));
 368         rc += scnprintf(buffer + rc, PAGE_SIZE - rc,
 369                         "controller function: %x\n",
 370                         be16_to_cpu(x_sys->controller_function));
 371         rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "start sector: %x\n",
 372                         be16_to_cpu(x_sys->start_sector));
 373         rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "unit size: %x\n",
 374                         be16_to_cpu(x_sys->unit_size));
 375         rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "sub class: %x\n",
 376                         x_sys->ms_sub_class);
 377         rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "interface type: %x\n",
 378                         x_sys->interface_type);
 379         rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "controller code: %x\n",
 380                         be16_to_cpu(x_sys->controller_code));
 381         rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "format type: %x\n",
 382                         x_sys->format_type);
 383         rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "device type: %x\n",
 384                         x_sys->device_type);
 385         rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "mspro id: %s\n",
 386                         x_sys->mspro_id);
 387         return rc;
 388 }
 389
 390 static ssize_t mspro_block_attr_show_modelname(struct device *dev,
 391                                                struct device_attribute *attr,
 392                                                char *buffer)
 393 {
 394         struct mspro_sys_attr *s_attr = container_of(attr,
 395                                                      struct mspro_sys_attr,
 396                                                      dev_attr);
 397
 398         return scnprintf(buffer, PAGE_SIZE, "%s", (char *)s_attr->data);
 399 }
 400
 401 static ssize_t mspro_block_attr_show_mbr(struct device *dev,
 402                                          struct device_attribute *attr,
 403                                          char *buffer)
 404 {
 405         struct mspro_sys_attr *x_attr = container_of(attr,
 406                                                      struct mspro_sys_attr,
 407                                                      dev_attr);
 408         struct mspro_mbr *x_mbr = x_attr->data;
 409         ssize_t rc = 0;
 410
 411         rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "boot partition: %x\n",
 412                         x_mbr->boot_partition);
 413         rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "start head: %x\n",
 414                         x_mbr->start_head);
 415         rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "start sector: %x\n",
 416                         x_mbr->start_sector);
 417         rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "start cylinder: %x\n",
 418                         x_mbr->start_cylinder);
 419         rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "partition type: %x\n",
 420                         x_mbr->partition_type);
 421         rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "end head: %x\n",
 422                         x_mbr->end_head);
 423         rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "end sector: %x\n",
 424                         x_mbr->end_sector);
 425         rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "end cylinder: %x\n",
 426                         x_mbr->end_cylinder);
 427         rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "start sectors: %x\n",
 428                         x_mbr->start_sectors);
 429         rc += scnprintf(buffer + rc, PAGE_SIZE - rc,
 430                         "sectors per partition: %x\n",
 431                         x_mbr->sectors_per_partition);
 432         return rc;
 433 }
 434
 435 static ssize_t mspro_block_attr_show_specfile(struct device *dev,
 436                                               struct device_attribute *attr,
 437                                               char *buffer)
 438 {
 439         struct mspro_sys_attr *x_attr = container_of(attr,
 440                                                      struct mspro_sys_attr,
 441                                                      dev_attr);
 442         struct mspro_specfile *x_spfile = x_attr->data;
 443         char name[9], ext[4];
 444         ssize_t rc = 0;
 445
 446         memcpy(name, x_spfile->name, 8);
 447         name[8] = 0;
 448         memcpy(ext, x_spfile->ext, 3);
 449         ext[3] = 0;
 450
 451         rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "name: %s\n", name);
 452         rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "ext: %s\n", ext);
 453         rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "attribute: %x\n",
 454                         x_spfile->attr);
 455         rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "time: %d:%d:%d\n",
 456                         x_spfile->time >> 11,
 457                         (x_spfile->time >> 5) & 0x3f,
 458                         (x_spfile->time & 0x1f) * 2);
 459         rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "date: %d-%d-%d\n",
 460                         (x_spfile->date >> 9) + 1980,
 461                         (x_spfile->date >> 5) & 0xf,
 462                         x_spfile->date & 0x1f);
 463         rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "start cluster: %x\n",
 464                         x_spfile->cluster);
 465         rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "size: %x\n",
 466                         x_spfile->size);
 467         return rc;
 468 }
 469
 470 static ssize_t mspro_block_attr_show_devinfo(struct device *dev,
 471                                              struct device_attribute *attr,
 472                                              char *buffer)
 473 {
 474         struct mspro_sys_attr *x_attr = container_of(attr,
 475                                                      struct mspro_sys_attr,
 476                                                      dev_attr);
 477         struct mspro_devinfo *x_devinfo = x_attr->data;
 478         ssize_t rc = 0;
 479
 480         rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "cylinders: %x\n",
 481                         be16_to_cpu(x_devinfo->cylinders));
 482         rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "heads: %x\n",
 483                         be16_to_cpu(x_devinfo->heads));
 484         rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "bytes per track: %x\n",
 485                         be16_to_cpu(x_devinfo->bytes_per_track));
 486         rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "bytes per sector: %x\n",
 487                         be16_to_cpu(x_devinfo->bytes_per_sector));
 488         rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "sectors per track: %x\n",
 489                         be16_to_cpu(x_devinfo->sectors_per_track));
 490         return rc;
 491 }
 492
 493 static sysfs_show_t mspro_block_attr_show(unsigned char tag)
 494 {
 495         switch (tag) {
 496         case MSPRO_BLOCK_ID_SYSINFO:
 497                 return mspro_block_attr_show_sysinfo;
 498         case MSPRO_BLOCK_ID_MODELNAME:
 499                 return mspro_block_attr_show_modelname;
 500         case MSPRO_BLOCK_ID_MBR:
 501                 return mspro_block_attr_show_mbr;
 502         case MSPRO_BLOCK_ID_SPECFILEVALUES1:
 503         case MSPRO_BLOCK_ID_SPECFILEVALUES2:
 504                 return mspro_block_attr_show_specfile;
 505         case MSPRO_BLOCK_ID_DEVINFO:
 506                 return mspro_block_attr_show_devinfo;
 507         default:
 508                 return mspro_block_attr_show_default;
 509         }
 510 }
 511
 512 /*** Protocol handlers ***/
 513
 514 /*
 515  * Functions prefixed with "h_" are protocol callbacks. They can be called from
 516  * interrupt context. Return value of 0 means that request processing is still
 517  * ongoing, while special error value of -EAGAIN means that current request is
 518  * finished (and request processor should come back some time later).
 519  */
 520
 521 static int h_mspro_block_req_init(struct memstick_dev *card,
 522                                   struct memstick_request **mrq)
 523 {
 524         struct mspro_block_data *msb = memstick_get_drvdata(card);
 525
 526         *mrq = &card->current_mrq;
 527         card->next_request = msb->mrq_handler;
 528         return 0;
 529 }
 530
 531 static int h_mspro_block_default(struct memstick_dev *card,
 532                                  struct memstick_request **mrq)
 533 {
 534         return mspro_block_complete_req(card, (*mrq)->error);
 535 }
 536
 537 static int h_mspro_block_default_bad(struct memstick_dev *card,
 538                                      struct memstick_request **mrq)
 539 {
 540         return -ENXIO;
 541 }
 542
 543 static int h_mspro_block_get_ro(struct memstick_dev *card,
 544                                 struct memstick_request **mrq)
 545 {
 546         struct mspro_block_data *msb = memstick_get_drvdata(card);
 547
 548         if (!(*mrq)->error) {
 549                 if ((*mrq)->data[offsetof(struct ms_status_register, status0)]
 550                     & MEMSTICK_STATUS0_WP)
 551                         msb->read_only = 1;
 552                 else
 553                         msb->read_only = 0;
 554         }
 555
 556         return mspro_block_complete_req(card, (*mrq)->error);
 557 }
 558
 559 static int h_mspro_block_wait_for_ced(struct memstick_dev *card,
 560                                       struct memstick_request **mrq)
 561 {
 562         dev_dbg(&card->dev, "wait for ced: value %x\n", (*mrq)->data[0]);
 563
 564         if (!(*mrq)->error) {
 565                 if ((*mrq)->data[0] & (MEMSTICK_INT_CMDNAK | MEMSTICK_INT_ERR))
 566                         (*mrq)->error = -EFAULT;
 567                 else if (!((*mrq)->data[0] & MEMSTICK_INT_CED))
 568                         return 0;
 569         }
 570
 571         return mspro_block_complete_req(card, (*mrq)->error);
 572 }
 573
 574 static int h_mspro_block_transfer_data(struct memstick_dev *card,
 575                                        struct memstick_request **mrq)
 576 {
 577         struct mspro_block_data *msb = memstick_get_drvdata(card);
 578         unsigned char t_val = 0;
 579         struct scatterlist t_sg = { 0 };
 580         size_t t_offset;
 581
 582         if ((*mrq)->error)
 583                 return mspro_block_complete_req(card, (*mrq)->error);
 584
 585         switch ((*mrq)->tpc) {
 586         case MS_TPC_WRITE_REG:
 587                 memstick_init_req(*mrq, MS_TPC_SET_CMD, &msb->transfer_cmd, 1);
 588                 (*mrq)->need_card_int = 1;
 589                 return 0;
 590         case MS_TPC_SET_CMD:
 591                 t_val = (*mrq)->int_reg;
 592                 memstick_init_req(*mrq, MS_TPC_GET_INT, NULL, 1);
 593                 if (msb->caps & MEMSTICK_CAP_AUTO_GET_INT)
 594                         goto has_int_reg;
 595                 return 0;
 596         case MS_TPC_GET_INT:
 597                 t_val = (*mrq)->data[0];
 598 has_int_reg:
 599                 if (t_val & (MEMSTICK_INT_CMDNAK | MEMSTICK_INT_ERR)) {
 600                         t_val = MSPRO_CMD_STOP;
 601                         memstick_init_req(*mrq, MS_TPC_SET_CMD, &t_val, 1);
 602                         card->next_request = h_mspro_block_default;
 603                         return 0;
 604                 }
 605
 606                 if (msb->current_page
 607                     == (msb->req_sg[msb->current_seg].length
 608                         / msb->page_size)) {
 609                         msb->current_page = 0;
 610                         msb->current_seg++;
 611
 612                         if (msb->current_seg == msb->seg_count) {
 613                                 if (t_val & MEMSTICK_INT_CED) {
 614                                         return mspro_block_complete_req(card,
 615                                                                         0);
 616                                 } else {
 617                                         card->next_request
 618                                                 = h_mspro_block_wait_for_ced;
 619                                         memstick_init_req(*mrq, MS_TPC_GET_INT,
 620                                                           NULL, 1);
 621                                         return 0;
 622                                 }
 623                         }
 624                 }
 625
 626                 if (!(t_val & MEMSTICK_INT_BREQ)) {
 627                         memstick_init_req(*mrq, MS_TPC_GET_INT, NULL, 1);
 628                         return 0;
 629                 }
 630
 631                 t_offset = msb->req_sg[msb->current_seg].offset;
 632                 t_offset += msb->current_page * msb->page_size;
 633
 634                 sg_set_page(&t_sg,
 635                             nth_page(sg_page(&(msb->req_sg[msb->current_seg])),
 636                                      t_offset >> PAGE_SHIFT),
 637                             msb->page_size, offset_in_page(t_offset));
 638
 639                 memstick_init_req_sg(*mrq, msb->data_dir == READ
 640                                            ? MS_TPC_READ_LONG_DATA
 641                                            : MS_TPC_WRITE_LONG_DATA,
 642                                      &t_sg);
 643                 (*mrq)->need_card_int = 1;
 644                 return 0;
 645         case MS_TPC_READ_LONG_DATA:
 646         case MS_TPC_WRITE_LONG_DATA:
 647                 msb->current_page++;
 648                 if (msb->caps & MEMSTICK_CAP_AUTO_GET_INT) {
 649                         t_val = (*mrq)->int_reg;
 650                         goto has_int_reg;
 651                 } else {
 652                         memstick_init_req(*mrq, MS_TPC_GET_INT, NULL, 1);
 653                         return 0;
 654                 }
 655
 656         default:
 657                 BUG();
 658         }
 659 }
 660
 661 /*** Transfer setup functions for different access methods. ***/
 662
 663 /** Setup data transfer request for SET_CMD TPC with arguments in card
 664  *  registers.
 665  *
 666  *  @card    Current media instance
 667  *  @offset  Target data offset in bytes
 668  *  @length  Required transfer length in bytes.
 669  */
 670 static void h_mspro_block_setup_cmd(struct memstick_dev *card, u64 offset,
 671                                     size_t length)
 672 {
 673         struct mspro_block_data *msb = memstick_get_drvdata(card);
 674         struct mspro_param_register param = {
 675                 .system = msb->system,
 676                 .data_count = cpu_to_be16((uint16_t)(length / msb->page_size)),
 677                 /* ISO C90 warning precludes direct initialization for now. */
 678                 .data_address = 0,
 679                 .tpc_param = 0
 680         };
 681
 682         do_div(offset, msb->page_size);
 683         param.data_address = cpu_to_be32((uint32_t)offset);
 684
 685         card->next_request = h_mspro_block_req_init;
 686         msb->mrq_handler = h_mspro_block_transfer_data;
 687         memstick_init_req(&card->current_mrq, MS_TPC_WRITE_REG,
 688                           &param, sizeof(param));
 689 }
 690
 691 /*** Data transfer ***/
 692
 693 static int mspro_block_issue_req(struct memstick_dev *card)
 694 {
 695         struct mspro_block_data *msb = memstick_get_drvdata(card);
 696         u64 t_off;
 697         unsigned int count;
 698
 699         while (true) {
 700                 msb->current_page = 0;
 701                 msb->current_seg = 0;
 702                 msb->seg_count = blk_rq_map_sg(msb->block_req->q,
 703                                                msb->block_req,
 704                                                msb->req_sg);
 705
 706                 if (!msb->seg_count) {
 707                         unsigned int bytes = blk_rq_cur_bytes(msb->block_req);
 708                         bool chunk;
 709
 710                         chunk = blk_update_request(msb->block_req,
 711                                                         BLK_STS_RESOURCE,
 712                                                         bytes);
 713                         if (chunk)
 714                                 continue;
 715                         __blk_mq_end_request(msb->block_req,
 716                                                 BLK_STS_RESOURCE);
 717                         msb->block_req = NULL;
 718                         return -EAGAIN;
 719                 }
 720
 721                 t_off = blk_rq_pos(msb->block_req);
 722                 t_off <<= 9;
 723                 count = blk_rq_bytes(msb->block_req);
 724
 725                 msb->setup_transfer(card, t_off, count);
 726
 727                 msb->data_dir = rq_data_dir(msb->block_req);
 728                 msb->transfer_cmd = msb->data_dir == READ
 729                                     ? MSPRO_CMD_READ_DATA
 730                                     : MSPRO_CMD_WRITE_DATA;
 731
 732                 memstick_new_req(card->host);
 733                 return 0;
 734         }
 735 }
 736
 737 static int mspro_block_complete_req(struct memstick_dev *card, int error)
 738 {
 739         struct mspro_block_data *msb = memstick_get_drvdata(card);
 740         int cnt;
 741         bool chunk;
 742         unsigned int t_len = 0;
 743         unsigned long flags;
 744
 745         spin_lock_irqsave(&msb->q_lock, flags);
 746         dev_dbg(&card->dev, "complete %d, %d\n", msb->block_req ? 1 : 0,
 747                 error);
 748
 749         if (msb->block_req) {
 750                 /* Nothing to do - not really an error */
 751                 if (error == -EAGAIN)
 752                         error = 0;
 753
 754                 if (error || (card->current_mrq.tpc == MSPRO_CMD_STOP)) {
 755                         if (msb->data_dir == READ) {
 756                                 for (cnt = 0; cnt < msb->current_seg; cnt++) {
 757                                         t_len += msb->req_sg[cnt].length
 758                                                  / msb->page_size;
 759
 760                                         if (msb->current_page)
 761                                                 t_len += msb->current_page - 1;
 762
 763                                         t_len *= msb->page_size;
 764                                 }
 765                         }
 766                 } else
 767                         t_len = blk_rq_bytes(msb->block_req);
 768
 769                 dev_dbg(&card->dev, "transferred %x (%d)\n", t_len, error);
 770
 771                 if (error && !t_len)
 772                         t_len = blk_rq_cur_bytes(msb->block_req);
 773
 774                 chunk = blk_update_request(msb->block_req,
 775                                 errno_to_blk_status(error), t_len);
 776                 if (chunk) {
 777                         error = mspro_block_issue_req(card);
 778                         if (!error)
 779                                 goto out;
 780                 } else {
 781                         __blk_mq_end_request(msb->block_req,
 782                                                 errno_to_blk_status(error));
 783                         msb->block_req = NULL;
 784                 }
 785         } else {
 786                 if (!error)
 787                         error = -EAGAIN;
 788         }
 789
 790         card->next_request = h_mspro_block_default_bad;
 791         complete_all(&card->mrq_complete);
 792 out:
 793         spin_unlock_irqrestore(&msb->q_lock, flags);
 794         return error;
 795 }
 796
 797 static void mspro_block_stop(struct memstick_dev *card)
 798 {
 799         struct mspro_block_data *msb = memstick_get_drvdata(card);
 800         int rc = 0;
 801         unsigned long flags;
 802
 803         while (1) {
 804                 spin_lock_irqsave(&msb->q_lock, flags);
 805                 if (!msb->block_req) {
 806                         blk_mq_stop_hw_queues(msb->queue);
 807                         rc = 1;
 808                 }
 809                 spin_unlock_irqrestore(&msb->q_lock, flags);
 810
 811                 if (rc)
 812                         break;
 813
 814                 wait_for_completion(&card->mrq_complete);
 815         }
 816 }
 817
 818 static void mspro_block_start(struct memstick_dev *card)
 819 {
 820         struct mspro_block_data *msb = memstick_get_drvdata(card);
 821
 822         blk_mq_start_hw_queues(msb->queue);
 823 }
 824
 825 static blk_status_t mspro_queue_rq(struct blk_mq_hw_ctx *hctx,
 826                                    const struct blk_mq_queue_data *bd)
 827 {
 828         struct memstick_dev *card = hctx->queue->queuedata;
 829         struct mspro_block_data *msb = memstick_get_drvdata(card);
 830
 831         spin_lock_irq(&msb->q_lock);
 832
 833         if (msb->block_req) {
 834                 spin_unlock_irq(&msb->q_lock);
 835                 return BLK_STS_DEV_RESOURCE;
 836         }
 837
 838         if (msb->eject) {
 839                 spin_unlock_irq(&msb->q_lock);
 840                 blk_mq_start_request(bd->rq);
 841                 return BLK_STS_IOERR;
 842         }
 843
 844         msb->block_req = bd->rq;
 845         blk_mq_start_request(bd->rq);
 846
 847         if (mspro_block_issue_req(card))
 848                 msb->block_req = NULL;
 849
 850         spin_unlock_irq(&msb->q_lock);
 851         return BLK_STS_OK;
 852 }
 853
 854 /*** Initialization ***/
 855
 856 static int mspro_block_wait_for_ced(struct memstick_dev *card)
 857 {
 858         struct mspro_block_data *msb = memstick_get_drvdata(card);
 859
 860         card->next_request = h_mspro_block_req_init;
 861         msb->mrq_handler = h_mspro_block_wait_for_ced;
 862         memstick_init_req(&card->current_mrq, MS_TPC_GET_INT, NULL, 1);
 863         memstick_new_req(card->host);
 864         wait_for_completion(&card->mrq_complete);
 865         return card->current_mrq.error;
 866 }
 867
 868 static int mspro_block_set_interface(struct memstick_dev *card,
 869                                      unsigned char sys_reg)
 870 {
 871         struct memstick_host *host = card->host;
 872         struct mspro_block_data *msb = memstick_get_drvdata(card);
 873         struct mspro_param_register param = {
 874                 .system = sys_reg,
 875                 .data_count = 0,
 876                 .data_address = 0,
 877                 .tpc_param = 0
 878         };
 879
 880         card->next_request = h_mspro_block_req_init;
 881         msb->mrq_handler = h_mspro_block_default;
 882         memstick_init_req(&card->current_mrq, MS_TPC_WRITE_REG, &param,
 883                           sizeof(param));
 884         memstick_new_req(host);
 885         wait_for_completion(&card->mrq_complete);
 886         return card->current_mrq.error;
 887 }
 888
 889 static int mspro_block_switch_interface(struct memstick_dev *card)
 890 {
 891         struct memstick_host *host = card->host;
 892         struct mspro_block_data *msb = memstick_get_drvdata(card);
 893         int rc = 0;
 894
 895 try_again:
 896         if (msb->caps & MEMSTICK_CAP_PAR4)
 897                 rc = mspro_block_set_interface(card, MEMSTICK_SYS_PAR4);
 898         else
 899                 return 0;
 900
 901         if (rc) {
 902                 printk(KERN_WARNING
 903                        "%s: could not switch to 4-bit mode, error %d\n",
 904                        dev_name(&card->dev), rc);
 905                 return 0;
 906         }
 907
 908         msb->system = MEMSTICK_SYS_PAR4;
 909         host->set_param(host, MEMSTICK_INTERFACE, MEMSTICK_PAR4);
 910         printk(KERN_INFO "%s: switching to 4-bit parallel mode\n",
 911                dev_name(&card->dev));
 912
 913         if (msb->caps & MEMSTICK_CAP_PAR8) {
 914                 rc = mspro_block_set_interface(card, MEMSTICK_SYS_PAR8);
 915
 916                 if (!rc) {
 917                         msb->system = MEMSTICK_SYS_PAR8;
 918                         host->set_param(host, MEMSTICK_INTERFACE,
 919                                         MEMSTICK_PAR8);
 920                         printk(KERN_INFO
 921                                "%s: switching to 8-bit parallel mode\n",
 922                                dev_name(&card->dev));
 923                 } else
 924                         printk(KERN_WARNING
 925                                "%s: could not switch to 8-bit mode, error %d\n",
 926                                dev_name(&card->dev), rc);
 927         }
 928
 929         card->next_request = h_mspro_block_req_init;
 930         msb->mrq_handler = h_mspro_block_default;
 931         memstick_init_req(&card->current_mrq, MS_TPC_GET_INT, NULL, 1);
 932         memstick_new_req(card->host);
 933         wait_for_completion(&card->mrq_complete);
 934         rc = card->current_mrq.error;
 935
 936         if (rc) {
 937                 printk(KERN_WARNING
 938                        "%s: interface error, trying to fall back to serial\n",
 939                        dev_name(&card->dev));
 940                 msb->system = MEMSTICK_SYS_SERIAL;
 941                 host->set_param(host, MEMSTICK_POWER, MEMSTICK_POWER_OFF);
 942                 msleep(10);
 943                 host->set_param(host, MEMSTICK_POWER, MEMSTICK_POWER_ON);
 944                 host->set_param(host, MEMSTICK_INTERFACE, MEMSTICK_SERIAL);
 945
 946                 rc = memstick_set_rw_addr(card);
 947                 if (!rc)
 948                         rc = mspro_block_set_interface(card, msb->system);
 949
 950                 if (!rc) {
 951                         msleep(150);
 952                         rc = mspro_block_wait_for_ced(card);
 953                         if (rc)
 954                                 return rc;
 955
 956                         if (msb->caps & MEMSTICK_CAP_PAR8) {
 957                                 msb->caps &= ~MEMSTICK_CAP_PAR8;
 958                                 goto try_again;
 959                         }
 960                 }
 961         }
 962         return rc;
 963 }
 964
 965 /* Memory allocated for attributes by this function should be freed by
 966  * mspro_block_data_clear, no matter if the initialization process succeeded
 967  * or failed.
 968  */
 969 static int mspro_block_read_attributes(struct memstick_dev *card)
 970 {
 971         struct mspro_block_data *msb = memstick_get_drvdata(card);
 972         struct mspro_attribute *attr = NULL;
 973         struct mspro_sys_attr *s_attr = NULL;
 974         unsigned char *buffer = NULL;
 975         int cnt, rc, attr_count;
 976         /* While normally physical device offsets, represented here by
 977          * attr_offset and attr_len will be of large numeric types, we can be
 978          * sure, that attributes are close enough to the beginning of the
 979          * device, to save ourselves some trouble.
 980          */
 981         unsigned int addr, attr_offset = 0, attr_len = msb->page_size;
 982
 983         attr = kmalloc(msb->page_size, GFP_KERNEL);
 984         if (!attr)
 985                 return -ENOMEM;
 986
 987         sg_init_one(&msb->req_sg[0], attr, msb->page_size);
 988         msb->seg_count = 1;
 989         msb->current_seg = 0;
 990         msb->current_page = 0;
 991         msb->data_dir = READ;
 992         msb->transfer_cmd = MSPRO_CMD_READ_ATRB;
 993
 994         msb->setup_transfer(card, attr_offset, attr_len);
 995
 996         memstick_new_req(card->host);
 997         wait_for_completion(&card->mrq_complete);
 998         if (card->current_mrq.error) {
 999                 rc = card->current_mrq.error;
1000                 goto out_free_attr;
1001         }
1002
1003         if (be16_to_cpu(attr->signature) != MSPRO_BLOCK_SIGNATURE) {
1004                 printk(KERN_ERR "%s: unrecognized device signature %x\n",
1005                        dev_name(&card->dev), be16_to_cpu(attr->signature));
1006                 rc = -ENODEV;
1007                 goto out_free_attr;
1008         }
1009
1010         if (attr->count > MSPRO_BLOCK_MAX_ATTRIBUTES) {
1011                 printk(KERN_WARNING "%s: way too many attribute entries\n",
1012                        dev_name(&card->dev));
1013                 attr_count = MSPRO_BLOCK_MAX_ATTRIBUTES;
1014         } else
1015                 attr_count = attr->count;
1016
1017         msb->attr_group.attrs = kcalloc(attr_count + 1,
1018                                         sizeof(*msb->attr_group.attrs),
1019                                         GFP_KERNEL);
1020         if (!msb->attr_group.attrs) {
1021                 rc = -ENOMEM;
1022                 goto out_free_attr;
1023         }
1024         msb->attr_group.name = "media_attributes";
1025
1026         buffer = kmemdup(attr, attr_len, GFP_KERNEL);
1027         if (!buffer) {
1028                 rc = -ENOMEM;
1029                 goto out_free_attr;
1030         }
1031
1032         for (cnt = 0; cnt < attr_count; ++cnt) {
1033                 s_attr = kzalloc(sizeof(struct mspro_sys_attr), GFP_KERNEL);
1034                 if (!s_attr) {
1035                         rc = -ENOMEM;
1036                         goto out_free_buffer;
1037                 }
1038
1039                 msb->attr_group.attrs[cnt] = &s_attr->dev_attr.attr;
1040                 addr = be32_to_cpu(attr->entries[cnt].address);
1041                 s_attr->size = be32_to_cpu(attr->entries[cnt].size);
1042                 dev_dbg(&card->dev, "adding attribute %d: id %x, address %x, "
1043                         "size %zx\n", cnt, attr->entries[cnt].id, addr,
1044                         s_attr->size);
1045                 s_attr->id = attr->entries[cnt].id;
1046                 if (mspro_block_attr_name(s_attr->id))
1047                         snprintf(s_attr->name, sizeof(s_attr->name), "%s",
1048                                  mspro_block_attr_name(attr->entries[cnt].id));
1049                 else
1050                         snprintf(s_attr->name, sizeof(s_attr->name),
1051                                  "attr_x%02x", attr->entries[cnt].id);
1052
1053                 sysfs_attr_init(&s_attr->dev_attr.attr);
1054                 s_attr->dev_attr.attr.name = s_attr->name;
1055                 s_attr->dev_attr.attr.mode = S_IRUGO;
1056                 s_attr->dev_attr.show = mspro_block_attr_show(s_attr->id);
1057
1058                 if (!s_attr->size)
1059                         continue;
1060
1061                 s_attr->data = kmalloc(s_attr->size, GFP_KERNEL);
1062                 if (!s_attr->data) {
1063                         rc = -ENOMEM;
1064                         goto out_free_buffer;
1065                 }
1066
1067                 if (((addr / msb->page_size) == (attr_offset / msb->page_size))
1068                     && (((addr + s_attr->size - 1) / msb->page_size)
1069                         == (attr_offset / msb->page_size))) {
1070                         memcpy(s_attr->data, buffer + addr % msb->page_size,
1071                                s_attr->size);
1072                         continue;
1073                 }
1074
1075                 attr_offset = (addr / msb->page_size) * msb->page_size;
1076
1077                 if ((attr_offset + attr_len) < (addr + s_attr->size)) {
1078                         kfree(buffer);
1079                         attr_len = (((addr + s_attr->size) / msb->page_size)
1080                                     + 1 ) * msb->page_size - attr_offset;
1081                         buffer = kmalloc(attr_len, GFP_KERNEL);
1082                         if (!buffer) {
1083                                 rc = -ENOMEM;
1084                                 goto out_free_attr;
1085                         }
1086                 }
1087
1088                 sg_init_one(&msb->req_sg[0], buffer, attr_len);
1089                 msb->seg_count = 1;
1090                 msb->current_seg = 0;
1091                 msb->current_page = 0;
1092                 msb->data_dir = READ;
1093                 msb->transfer_cmd = MSPRO_CMD_READ_ATRB;
1094
1095                 dev_dbg(&card->dev, "reading attribute range %x, %x\n",
1096                         attr_offset, attr_len);
1097
1098                 msb->setup_transfer(card, attr_offset, attr_len);
1099                 memstick_new_req(card->host);
1100                 wait_for_completion(&card->mrq_complete);
1101                 if (card->current_mrq.error) {
1102                         rc = card->current_mrq.error;
1103                         goto out_free_buffer;
1104                 }
1105
1106                 memcpy(s_attr->data, buffer + addr % msb->page_size,
1107                        s_attr->size);
1108         }
1109
1110         rc = 0;
1111 out_free_buffer:
1112         kfree(buffer);
1113 out_free_attr:
1114         kfree(attr);
1115         return rc;
1116 }
1117
1118 static int mspro_block_init_card(struct memstick_dev *card)
1119 {
1120         struct mspro_block_data *msb = memstick_get_drvdata(card);
1121         struct memstick_host *host = card->host;
1122         int rc = 0;
1123
1124         msb->system = MEMSTICK_SYS_SERIAL;
1125         msb->setup_transfer = h_mspro_block_setup_cmd;
1126
1127         card->reg_addr.r_offset = offsetof(struct mspro_register, status);
1128         card->reg_addr.r_length = sizeof(struct ms_status_register);
1129         card->reg_addr.w_offset = offsetof(struct mspro_register, param);
1130         card->reg_addr.w_length = sizeof(struct mspro_param_register);
1131
1132         if (memstick_set_rw_addr(card))
1133                 return -EIO;
1134
1135         msb->caps = host->caps;
1136
1137         msleep(150);
1138         rc = mspro_block_wait_for_ced(card);
1139         if (rc)
1140                 return rc;
1141
1142         rc = mspro_block_switch_interface(card);
1143         if (rc)
1144                 return rc;
1145
1146         dev_dbg(&card->dev, "card activated\n");
1147         if (msb->system != MEMSTICK_SYS_SERIAL)
1148                 msb->caps |= MEMSTICK_CAP_AUTO_GET_INT;
1149
1150         card->next_request = h_mspro_block_req_init;
1151         msb->mrq_handler = h_mspro_block_get_ro;
1152         memstick_init_req(&card->current_mrq, MS_TPC_READ_REG, NULL,
1153                           sizeof(struct ms_status_register));
1154         memstick_new_req(card->host);
1155         wait_for_completion(&card->mrq_complete);
1156         if (card->current_mrq.error)
1157                 return card->current_mrq.error;
1158
1159         dev_dbg(&card->dev, "card r/w status %d\n", msb->read_only ? 0 : 1);
1160
1161         msb->page_size = 512;
1162         rc = mspro_block_read_attributes(card);
1163         if (rc)
1164                 return rc;
1165
1166         dev_dbg(&card->dev, "attributes loaded\n");
1167         return 0;
1168
1169 }
1170
1171 static const struct blk_mq_ops mspro_mq_ops = {
1172         .queue_rq       = mspro_queue_rq,
1173 };
1174
1175 static int mspro_block_init_disk(struct memstick_dev *card)
1176 {
1177         struct mspro_block_data *msb = memstick_get_drvdata(card);
1178         struct mspro_devinfo *dev_info = NULL;
1179         struct mspro_sys_info *sys_info = NULL;
1180         struct mspro_sys_attr *s_attr = NULL;
1181         int rc, disk_id;
1182         unsigned long capacity;
1183
1184         for (rc = 0; msb->attr_group.attrs[rc]; ++rc) {
1185                 s_attr = mspro_from_sysfs_attr(msb->attr_group.attrs[rc]);
1186
1187                 if (s_attr->id == MSPRO_BLOCK_ID_DEVINFO)
1188                         dev_info = s_attr->data;
1189                 else if (s_attr->id == MSPRO_BLOCK_ID_SYSINFO)
1190                         sys_info = s_attr->data;
1191         }
1192
1193         if (!dev_info || !sys_info)
1194                 return -ENODEV;
1195
1196         msb->cylinders = be16_to_cpu(dev_info->cylinders);
1197         msb->heads = be16_to_cpu(dev_info->heads);
1198         msb->sectors_per_track = be16_to_cpu(dev_info->sectors_per_track);
1199
1200         msb->page_size = be16_to_cpu(sys_info->unit_size);
1201
1202         mutex_lock(&mspro_block_disk_lock);
1203         disk_id = idr_alloc(&mspro_block_disk_idr, card, 0, 256, GFP_KERNEL);
1204         mutex_unlock(&mspro_block_disk_lock);
1205         if (disk_id < 0)
1206                 return disk_id;
1207
1208         msb->disk = alloc_disk(1 << MSPRO_BLOCK_PART_SHIFT);
1209         if (!msb->disk) {
1210                 rc = -ENOMEM;
1211                 goto out_release_id;
1212         }
1213
1214         msb->queue = blk_mq_init_sq_queue(&msb->tag_set, &mspro_mq_ops, 2,
1215                                                 BLK_MQ_F_SHOULD_MERGE);
1216         if (IS_ERR(msb->queue)) {
1217                 rc = PTR_ERR(msb->queue);
1218                 msb->queue = NULL;
1219                 goto out_put_disk;
1220         }
1221
1222         msb->queue->queuedata = card;
1223
1224         blk_queue_max_hw_sectors(msb->queue, MSPRO_BLOCK_MAX_PAGES);
1225         blk_queue_max_segments(msb->queue, MSPRO_BLOCK_MAX_SEGS);
1226         blk_queue_max_segment_size(msb->queue,
1227                                    MSPRO_BLOCK_MAX_PAGES * msb->page_size);
1228
1229         msb->disk->major = major;
1230         msb->disk->first_minor = disk_id << MSPRO_BLOCK_PART_SHIFT;
1231         msb->disk->fops = &ms_block_bdops;
1232         msb->usage_count = 1;
1233         msb->disk->private_data = msb;
1234         msb->disk->queue = msb->queue;
1235
1236         sprintf(msb->disk->disk_name, "mspblk%d", disk_id);
1237
1238         blk_queue_logical_block_size(msb->queue, msb->page_size);
1239
1240         capacity = be16_to_cpu(sys_info->user_block_count);
1241         capacity *= be16_to_cpu(sys_info->block_size);
1242         capacity *= msb->page_size >> 9;
1243         set_capacity(msb->disk, capacity);
1244         dev_dbg(&card->dev, "capacity set %ld\n", capacity);
1245
1246         device_add_disk(&card->dev, msb->disk, NULL);
1247         msb->active = 1;
1248         return 0;
1249
1250 out_put_disk:
1251         put_disk(msb->disk);
1252 out_release_id:
1253         mutex_lock(&mspro_block_disk_lock);
1254         idr_remove(&mspro_block_disk_idr, disk_id);
1255         mutex_unlock(&mspro_block_disk_lock);
1256         return rc;
1257 }
1258
1259 static void mspro_block_data_clear(struct mspro_block_data *msb)
1260 {
1261         int cnt;
1262         struct mspro_sys_attr *s_attr;
1263
1264         if (msb->attr_group.attrs) {
1265                 for (cnt = 0; msb->attr_group.attrs[cnt]; ++cnt) {
1266                         s_attr = mspro_from_sysfs_attr(msb->attr_group
1267                                                            .attrs[cnt]);
1268                         kfree(s_attr->data);
1269                         kfree(s_attr);
1270                 }
1271                 kfree(msb->attr_group.attrs);
1272         }
1273
1274         msb->card = NULL;
1275 }
1276
1277 static int mspro_block_check_card(struct memstick_dev *card)
1278 {
1279         struct mspro_block_data *msb = memstick_get_drvdata(card);
1280
1281         return (msb->active == 1);
1282 }
1283
1284 static int mspro_block_probe(struct memstick_dev *card)
1285 {
1286         struct mspro_block_data *msb;
1287         int rc = 0;
1288
1289         msb = kzalloc(sizeof(struct mspro_block_data), GFP_KERNEL);
1290         if (!msb)
1291                 return -ENOMEM;
1292         memstick_set_drvdata(card, msb);
1293         msb->card = card;
1294         spin_lock_init(&msb->q_lock);
1295
1296         rc = mspro_block_init_card(card);
1297
1298         if (rc)
1299                 goto out_free;
1300
1301         rc = sysfs_create_group(&card->dev.kobj, &msb->attr_group);
1302         if (rc)
1303                 goto out_free;
1304
1305         rc = mspro_block_init_disk(card);
1306         if (!rc) {
1307                 card->check = mspro_block_check_card;
1308                 card->stop = mspro_block_stop;
1309                 card->start = mspro_block_start;
1310                 return 0;
1311         }
1312
1313         sysfs_remove_group(&card->dev.kobj, &msb->attr_group);
1314 out_free:
1315         memstick_set_drvdata(card, NULL);
1316         mspro_block_data_clear(msb);
1317         kfree(msb);
1318         return rc;
1319 }
1320
1321 static void mspro_block_remove(struct memstick_dev *card)
1322 {
1323         struct mspro_block_data *msb = memstick_get_drvdata(card);
1324         unsigned long flags;
1325
1326         spin_lock_irqsave(&msb->q_lock, flags);
1327         msb->eject = 1;
1328         spin_unlock_irqrestore(&msb->q_lock, flags);
1329         blk_mq_start_hw_queues(msb->queue);
1330
1331         del_gendisk(msb->disk);
1332         dev_dbg(&card->dev, "mspro block remove\n");
1333
1334         blk_cleanup_queue(msb->queue);
1335         blk_mq_free_tag_set(&msb->tag_set);
1336         msb->queue = NULL;
1337
1338         sysfs_remove_group(&card->dev.kobj, &msb->attr_group);
1339
1340         mutex_lock(&mspro_block_disk_lock);
1341         mspro_block_data_clear(msb);
1342         mutex_unlock(&mspro_block_disk_lock);
1343
1344         mspro_block_disk_release(msb->disk);
1345         memstick_set_drvdata(card, NULL);
1346 }
1347
1348 #ifdef CONFIG_PM
1349
1350 static int mspro_block_suspend(struct memstick_dev *card, pm_message_t state)
1351 {
1352         struct mspro_block_data *msb = memstick_get_drvdata(card);
1353         unsigned long flags;
1354
1355         blk_mq_stop_hw_queues(msb->queue);
1356
1357         spin_lock_irqsave(&msb->q_lock, flags);
1358         msb->active = 0;
1359         spin_unlock_irqrestore(&msb->q_lock, flags);
1360
1361         return 0;
1362 }
1363
1364 static int mspro_block_resume(struct memstick_dev *card)
1365 {
1366         struct mspro_block_data *msb = memstick_get_drvdata(card);
1367         int rc = 0;
1368
1369 #ifdef CONFIG_MEMSTICK_UNSAFE_RESUME
1370
1371         struct mspro_block_data *new_msb;
1372         struct memstick_host *host = card->host;
1373         struct mspro_sys_attr *s_attr, *r_attr;
1374         unsigned char cnt;
1375
1376         mutex_lock(&host->lock);
1377         new_msb = kzalloc(sizeof(struct mspro_block_data), GFP_KERNEL);
1378         if (!new_msb) {
1379                 rc = -ENOMEM;
1380                 goto out_unlock;
1381         }
1382
1383         new_msb->card = card;
1384         memstick_set_drvdata(card, new_msb);
1385         if (mspro_block_init_card(card))
1386                 goto out_free;
1387
1388         for (cnt = 0; new_msb->attr_group.attrs[cnt]
1389                       && msb->attr_group.attrs[cnt]; ++cnt) {
1390                 s_attr = mspro_from_sysfs_attr(new_msb->attr_group.attrs[cnt]);
1391                 r_attr = mspro_from_sysfs_attr(msb->attr_group.attrs[cnt]);
1392
1393                 if (s_attr->id == MSPRO_BLOCK_ID_SYSINFO
1394                     && r_attr->id == s_attr->id) {
1395                         if (memcmp(s_attr->data, r_attr->data, s_attr->size))
1396                                 break;
1397
1398                         msb->active = 1;
1399                         break;
1400                 }
1401         }
1402
1403 out_free:
1404         memstick_set_drvdata(card, msb);
1405         mspro_block_data_clear(new_msb);
1406         kfree(new_msb);
1407 out_unlock:
1408         mutex_unlock(&host->lock);
1409
1410 #endif /* CONFIG_MEMSTICK_UNSAFE_RESUME */
1411
1412         blk_mq_start_hw_queues(msb->queue);
1413         return rc;
1414 }
1415
1416 #else
1417
1418 #define mspro_block_suspend NULL
1419 #define mspro_block_resume NULL
1420
1421 #endif /* CONFIG_PM */
1422
1423 static struct memstick_device_id mspro_block_id_tbl[] = {
1424         {MEMSTICK_MATCH_ALL, MEMSTICK_TYPE_PRO, MEMSTICK_CATEGORY_STORAGE_DUO,
1425          MEMSTICK_CLASS_DUO},
1426         {}
1427 };
1428
1429
1430 static struct memstick_driver mspro_block_driver = {
1431         .driver = {
1432                 .name  = DRIVER_NAME,
1433                 .owner = THIS_MODULE
1434         },
1435         .id_table = mspro_block_id_tbl,
1436         .probe    = mspro_block_probe,
1437         .remove   = mspro_block_remove,
1438         .suspend  = mspro_block_suspend,
1439         .resume   = mspro_block_resume
1440 };
1441
1442 static int __init mspro_block_init(void)
1443 {
1444         int rc = -ENOMEM;
1445
1446         rc = register_blkdev(major, DRIVER_NAME);
1447         if (rc < 0) {
1448                 printk(KERN_ERR DRIVER_NAME ": failed to register "
1449                        "major %d, error %d\n", major, rc);
1450                 return rc;
1451         }
1452         if (!major)
1453                 major = rc;
1454
1455         rc = memstick_register_driver(&mspro_block_driver);
1456         if (rc)
1457                 unregister_blkdev(major, DRIVER_NAME);
1458         return rc;
1459 }
1460
1461 static void __exit mspro_block_exit(void)
1462 {
1463         memstick_unregister_driver(&mspro_block_driver);
1464         unregister_blkdev(major, DRIVER_NAME);
1465         idr_destroy(&mspro_block_disk_idr);
1466 }
1467
1468 module_init(mspro_block_init);
1469 module_exit(mspro_block_exit);
1470
1471 MODULE_LICENSE("GPL");
1472 MODULE_AUTHOR("Alex Dubov");
1473 MODULE_DESCRIPTION("Sony MemoryStickPro block device driver");
1474 MODULE_DEVICE_TABLE(memstick, mspro_block_id_tbl);