drivers/memstick/core/mspro_block.c

   1 /*
   2  *  Sony MemoryStick Pro storage support
   3  *
   4  *  Copyright (C) 2007 Alex Dubov <[email protected]>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 as
   8  * published by the Free Software Foundation.
   9  *
  10  * Special thanks to Carlos Corbacho for providing various MemoryStick cards
  11  * that made this driver possible.
  12  *
  13  */
  14
  15 #include <linux/blk-mq.h>
  16 #include <linux/idr.h>
  17 #include <linux/hdreg.h>
  18 #include <linux/kthread.h>
  19 #include <linux/delay.h>
  20 #include <linux/slab.h>
  21 #include <linux/mutex.h>
  22 #include <linux/memstick.h>
  23 #include <linux/module.h>
  24
  25 #define DRIVER_NAME "mspro_block"
  26
  27 static int major;
  28 module_param(major, int, 0644);
  29
  30 #define MSPRO_BLOCK_MAX_SEGS  32
  31 #define MSPRO_BLOCK_MAX_PAGES ((2 << 16) - 1)
  32
  33 #define MSPRO_BLOCK_SIGNATURE        0xa5c3
  34 #define MSPRO_BLOCK_MAX_ATTRIBUTES   41
  35
  36 #define MSPRO_BLOCK_PART_SHIFT 3
  37
  38 enum {
  39         MSPRO_BLOCK_ID_SYSINFO         = 0x10,
  40         MSPRO_BLOCK_ID_MODELNAME       = 0x15,
  41         MSPRO_BLOCK_ID_MBR             = 0x20,
  42         MSPRO_BLOCK_ID_PBR16           = 0x21,
  43         MSPRO_BLOCK_ID_PBR32           = 0x22,
  44         MSPRO_BLOCK_ID_SPECFILEVALUES1 = 0x25,
  45         MSPRO_BLOCK_ID_SPECFILEVALUES2 = 0x26,
  46         MSPRO_BLOCK_ID_DEVINFO         = 0x30
  47 };
  48
  49 struct mspro_sys_attr {
  50         size_t                  size;
  51         void                    *data;
  52         unsigned char           id;
  53         char                    name[32];
  54         struct device_attribute dev_attr;
  55 };
  56
  57 struct mspro_attr_entry {
  58         __be32 address;
  59         __be32 size;
  60         unsigned char id;
  61         unsigned char reserved[3];
  62 } __attribute__((packed));
  63
  64 struct mspro_attribute {
  65         __be16 signature;
  66         unsigned short          version;
  67         unsigned char           count;
  68         unsigned char           reserved[11];
  69         struct mspro_attr_entry entries[];
  70 } __attribute__((packed));
  71
  72 struct mspro_sys_info {
  73         unsigned char  class;
  74         unsigned char  reserved0;
  75         __be16 block_size;
  76         __be16 block_count;
  77         __be16 user_block_count;
  78         __be16 page_size;
  79         unsigned char  reserved1[2];
  80         unsigned char  assembly_date[8];
  81         __be32 serial_number;
  82         unsigned char  assembly_maker_code;
  83         unsigned char  assembly_model_code[3];
  84         __be16 memory_maker_code;
  85         __be16 memory_model_code;
  86         unsigned char  reserved2[4];
  87         unsigned char  vcc;
  88         unsigned char  vpp;
  89         __be16 controller_number;
  90         __be16 controller_function;
  91         __be16 start_sector;
  92         __be16 unit_size;
  93         unsigned char  ms_sub_class;
  94         unsigned char  reserved3[4];
  95         unsigned char  interface_type;
  96         __be16 controller_code;
  97         unsigned char  format_type;
  98         unsigned char  reserved4;
  99         unsigned char  device_type;
 100         unsigned char  reserved5[7];
 101         unsigned char  mspro_id[16];
 102         unsigned char  reserved6[16];
 103 } __attribute__((packed));
 104
 105 struct mspro_mbr {
 106         unsigned char boot_partition;
 107         unsigned char start_head;
 108         unsigned char start_sector;
 109         unsigned char start_cylinder;
 110         unsigned char partition_type;
 111         unsigned char end_head;
 112         unsigned char end_sector;
 113         unsigned char end_cylinder;
 114         unsigned int  start_sectors;
 115         unsigned int  sectors_per_partition;
 116 } __attribute__((packed));
 117
 118 struct mspro_specfile {
 119         char           name[8];
 120         char           ext[3];
 121         unsigned char  attr;
 122         unsigned char  reserved[10];
 123         unsigned short time;
 124         unsigned short date;
 125         unsigned short cluster;
 126         unsigned int   size;
 127 } __attribute__((packed));
 128
 129 struct mspro_devinfo {
 130         __be16 cylinders;
 131         __be16 heads;
 132         __be16 bytes_per_track;
 133         __be16 bytes_per_sector;
 134         __be16 sectors_per_track;
 135         unsigned char  reserved[6];
 136 } __attribute__((packed));
 137
 138 struct mspro_block_data {
 139         struct memstick_dev   *card;
 140         unsigned int          usage_count;
 141         unsigned int          caps;
 142         struct gendisk        *disk;
 143         struct request_queue  *queue;
 144         struct request        *block_req;
 145         struct blk_mq_tag_set tag_set;
 146         spinlock_t            q_lock;
 147
 148         unsigned short        page_size;
 149         unsigned short        cylinders;
 150         unsigned short        heads;
 151         unsigned short        sectors_per_track;
 152
 153         unsigned char         system;
 154         unsigned char         read_only:1,
 155                               eject:1,
 156                               data_dir:1,
 157                               active:1;
 158         unsigned char         transfer_cmd;
 159
 160         int                   (*mrq_handler)(struct memstick_dev *card,
 161                                              struct memstick_request **mrq);
 162
 163
 164         /* Default request setup function for data access method preferred by
 165          * this host instance.
 166          */
 167         void                  (*setup_transfer)(struct memstick_dev *card,
 168                                                 u64 offset, size_t length);
 169
 170         struct attribute_group attr_group;
 171
 172         struct scatterlist    req_sg[MSPRO_BLOCK_MAX_SEGS];
 173         unsigned int          seg_count;
 174         unsigned int          current_seg;
 175         unsigned int          current_page;
 176 };
 177
 178 static DEFINE_IDR(mspro_block_disk_idr);
 179 static DEFINE_MUTEX(mspro_block_disk_lock);
 180
 181 static int mspro_block_complete_req(struct memstick_dev *card, int error);
 182
 183 /*** Block device ***/
 184
 185 static int mspro_block_bd_open(struct block_device *bdev, fmode_t mode)
 186 {
 187         struct gendisk *disk = bdev->bd_disk;
 188         struct mspro_block_data *msb = disk->private_data;
 189         int rc = -ENXIO;
 190
 191         mutex_lock(&mspro_block_disk_lock);
 192
 193         if (msb && msb->card) {
 194                 msb->usage_count++;
 195                 if ((mode & FMODE_WRITE) && msb->read_only)
 196                         rc = -EROFS;
 197                 else
 198                         rc = 0;
 199         }
 200
 201         mutex_unlock(&mspro_block_disk_lock);
 202
 203         return rc;
 204 }
 205
 206
 207 static void mspro_block_disk_release(struct gendisk *disk)
 208 {
 209         struct mspro_block_data *msb = disk->private_data;
 210         int disk_id = MINOR(disk_devt(disk)) >> MSPRO_BLOCK_PART_SHIFT;
 211
 212         mutex_lock(&mspro_block_disk_lock);
 213
 214         if (msb) {
 215                 if (msb->usage_count)
 216                         msb->usage_count--;
 217
 218                 if (!msb->usage_count) {
 219                         kfree(msb);
 220                         disk->private_data = NULL;
 221                         idr_remove(&mspro_block_disk_idr, disk_id);
 222                         put_disk(disk);
 223                 }
 224         }
 225
 226         mutex_unlock(&mspro_block_disk_lock);
 227 }
 228
 229 static void mspro_block_bd_release(struct gendisk *disk, fmode_t mode)
 230 {
 231         mspro_block_disk_release(disk);
 232 }
 233
 234 static int mspro_block_bd_getgeo(struct block_device *bdev,
 235                                  struct hd_geometry *geo)
 236 {
 237         struct mspro_block_data *msb = bdev->bd_disk->private_data;
 238
 239         geo->heads = msb->heads;
 240         geo->sectors = msb->sectors_per_track;
 241         geo->cylinders = msb->cylinders;
 242
 243         return 0;
 244 }
 245
 246 static const struct block_device_operations ms_block_bdops = {
 247         .open    = mspro_block_bd_open,
 248         .release = mspro_block_bd_release,
 249         .getgeo  = mspro_block_bd_getgeo,
 250         .owner   = THIS_MODULE
 251 };
 252
 253 /*** Information ***/
 254
 255 static struct mspro_sys_attr *mspro_from_sysfs_attr(struct attribute *attr)
 256 {
 257         struct device_attribute *dev_attr
 258                 = container_of(attr, struct device_attribute, attr);
 259         return container_of(dev_attr, struct mspro_sys_attr, dev_attr);
 260 }
 261
 262 static const char *mspro_block_attr_name(unsigned char tag)
 263 {
 264         switch (tag) {
 265         case MSPRO_BLOCK_ID_SYSINFO:
 266                 return "attr_sysinfo";
 267         case MSPRO_BLOCK_ID_MODELNAME:
 268                 return "attr_modelname";
 269         case MSPRO_BLOCK_ID_MBR:
 270                 return "attr_mbr";
 271         case MSPRO_BLOCK_ID_PBR16:
 272                 return "attr_pbr16";
 273         case MSPRO_BLOCK_ID_PBR32:
 274                 return "attr_pbr32";
 275         case MSPRO_BLOCK_ID_SPECFILEVALUES1:
 276                 return "attr_specfilevalues1";
 277         case MSPRO_BLOCK_ID_SPECFILEVALUES2:
 278                 return "attr_specfilevalues2";
 279         case MSPRO_BLOCK_ID_DEVINFO:
 280                 return "attr_devinfo";
 281         default:
 282                 return NULL;
 283         };
 284 }
 285
 286 typedef ssize_t (*sysfs_show_t)(struct device *dev,
 287                                 struct device_attribute *attr,
 288                                 char *buffer);
 289
 290 static ssize_t mspro_block_attr_show_default(struct device *dev,
 291                                              struct device_attribute *attr,
 292                                              char *buffer)
 293 {
 294         struct mspro_sys_attr *s_attr = container_of(attr,
 295                                                      struct mspro_sys_attr,
 296                                                      dev_attr);
 297
 298         ssize_t cnt, rc = 0;
 299
 300         for (cnt = 0; cnt < s_attr->size; cnt++) {
 301                 if (cnt && !(cnt % 16)) {
 302                         if (PAGE_SIZE - rc)
 303                                 buffer[rc++] = '\n';
 304                 }
 305
 306                 rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "%02x ",
 307                                 ((unsigned char *)s_attr->data)[cnt]);
 308         }
 309         return rc;
 310 }
 311
 312 static ssize_t mspro_block_attr_show_sysinfo(struct device *dev,
 313                                              struct device_attribute *attr,
 314                                              char *buffer)
 315 {
 316         struct mspro_sys_attr *x_attr = container_of(attr,
 317                                                      struct mspro_sys_attr,
 318                                                      dev_attr);
 319         struct mspro_sys_info *x_sys = x_attr->data;
 320         ssize_t rc = 0;
 321         int date_tz = 0, date_tz_f = 0;
 322
 323         if (x_sys->assembly_date[0] > 0x80U) {
 324                 date_tz = (~x_sys->assembly_date[0]) + 1;
 325                 date_tz_f = date_tz & 3;
 326                 date_tz >>= 2;
 327                 date_tz = -date_tz;
 328                 date_tz_f *= 15;
 329         } else if (x_sys->assembly_date[0] < 0x80U) {
 330                 date_tz = x_sys->assembly_date[0];
 331                 date_tz_f = date_tz & 3;
 332                 date_tz >>= 2;
 333                 date_tz_f *= 15;
 334         }
 335
 336         rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "class: %x\n",
 337                         x_sys->class);
 338         rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "block size: %x\n",
 339                         be16_to_cpu(x_sys->block_size));
 340         rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "block count: %x\n",
 341                         be16_to_cpu(x_sys->block_count));
 342         rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "user block count: %x\n",
 343                         be16_to_cpu(x_sys->user_block_count));
 344         rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "page size: %x\n",
 345                         be16_to_cpu(x_sys->page_size));
 346         rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "assembly date: "
 347                         "GMT%+d:%d %04u-%02u-%02u %02u:%02u:%02u\n",
 348                         date_tz, date_tz_f,
 349                         be16_to_cpup((__be16 *)&x_sys->assembly_date[1]),
 350                         x_sys->assembly_date[3], x_sys->assembly_date[4],
 351                         x_sys->assembly_date[5], x_sys->assembly_date[6],
 352                         x_sys->assembly_date[7]);
 353         rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "serial number: %x\n",
 354                         be32_to_cpu(x_sys->serial_number));
 355         rc += scnprintf(buffer + rc, PAGE_SIZE - rc,
 356                         "assembly maker code: %x\n",
 357                         x_sys->assembly_maker_code);
 358         rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "assembly model code: "
 359                         "%02x%02x%02x\n", x_sys->assembly_model_code[0],
 360                         x_sys->assembly_model_code[1],
 361                         x_sys->assembly_model_code[2]);
 362         rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "memory maker code: %x\n",
 363                         be16_to_cpu(x_sys->memory_maker_code));
 364         rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "memory model code: %x\n",
 365                         be16_to_cpu(x_sys->memory_model_code));
 366         rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "vcc: %x\n",
 367                         x_sys->vcc);
 368         rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "vpp: %x\n",
 369                         x_sys->vpp);
 370         rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "controller number: %x\n",
 371                         be16_to_cpu(x_sys->controller_number));
 372         rc += scnprintf(buffer + rc, PAGE_SIZE - rc,
 373                         "controller function: %x\n",
 374                         be16_to_cpu(x_sys->controller_function));
 375         rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "start sector: %x\n",
 376                         be16_to_cpu(x_sys->start_sector));
 377         rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "unit size: %x\n",
 378                         be16_to_cpu(x_sys->unit_size));
 379         rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "sub class: %x\n",
 380                         x_sys->ms_sub_class);
 381         rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "interface type: %x\n",
 382                         x_sys->interface_type);
 383         rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "controller code: %x\n",
 384                         be16_to_cpu(x_sys->controller_code));
 385         rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "format type: %x\n",
 386                         x_sys->format_type);
 387         rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "device type: %x\n",
 388                         x_sys->device_type);
 389         rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "mspro id: %s\n",
 390                         x_sys->mspro_id);
 391         return rc;
 392 }
 393
 394 static ssize_t mspro_block_attr_show_modelname(struct device *dev,
 395                                                struct device_attribute *attr,
 396                                                char *buffer)
 397 {
 398         struct mspro_sys_attr *s_attr = container_of(attr,
 399                                                      struct mspro_sys_attr,
 400                                                      dev_attr);
 401
 402         return scnprintf(buffer, PAGE_SIZE, "%s", (char *)s_attr->data);
 403 }
 404
 405 static ssize_t mspro_block_attr_show_mbr(struct device *dev,
 406                                          struct device_attribute *attr,
 407                                          char *buffer)
 408 {
 409         struct mspro_sys_attr *x_attr = container_of(attr,
 410                                                      struct mspro_sys_attr,
 411                                                      dev_attr);
 412         struct mspro_mbr *x_mbr = x_attr->data;
 413         ssize_t rc = 0;
 414
 415         rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "boot partition: %x\n",
 416                         x_mbr->boot_partition);
 417         rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "start head: %x\n",
 418                         x_mbr->start_head);
 419         rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "start sector: %x\n",
 420                         x_mbr->start_sector);
 421         rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "start cylinder: %x\n",
 422                         x_mbr->start_cylinder);
 423         rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "partition type: %x\n",
 424                         x_mbr->partition_type);
 425         rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "end head: %x\n",
 426                         x_mbr->end_head);
 427         rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "end sector: %x\n",
 428                         x_mbr->end_sector);
 429         rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "end cylinder: %x\n",
 430                         x_mbr->end_cylinder);
 431         rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "start sectors: %x\n",
 432                         x_mbr->start_sectors);
 433         rc += scnprintf(buffer + rc, PAGE_SIZE - rc,
 434                         "sectors per partition: %x\n",
 435                         x_mbr->sectors_per_partition);
 436         return rc;
 437 }
 438
 439 static ssize_t mspro_block_attr_show_specfile(struct device *dev,
 440                                               struct device_attribute *attr,
 441                                               char *buffer)
 442 {
 443         struct mspro_sys_attr *x_attr = container_of(attr,
 444                                                      struct mspro_sys_attr,
 445                                                      dev_attr);
 446         struct mspro_specfile *x_spfile = x_attr->data;
 447         char name[9], ext[4];
 448         ssize_t rc = 0;
 449
 450         memcpy(name, x_spfile->name, 8);
 451         name[8] = 0;
 452         memcpy(ext, x_spfile->ext, 3);
 453         ext[3] = 0;
 454
 455         rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "name: %s\n", name);
 456         rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "ext: %s\n", ext);
 457         rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "attribute: %x\n",
 458                         x_spfile->attr);
 459         rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "time: %d:%d:%d\n",
 460                         x_spfile->time >> 11,
 461                         (x_spfile->time >> 5) & 0x3f,
 462                         (x_spfile->time & 0x1f) * 2);
 463         rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "date: %d-%d-%d\n",
 464                         (x_spfile->date >> 9) + 1980,
 465                         (x_spfile->date >> 5) & 0xf,
 466                         x_spfile->date & 0x1f);
 467         rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "start cluster: %x\n",
 468                         x_spfile->cluster);
 469         rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "size: %x\n",
 470                         x_spfile->size);
 471         return rc;
 472 }
 473
 474 static ssize_t mspro_block_attr_show_devinfo(struct device *dev,
 475                                              struct device_attribute *attr,
 476                                              char *buffer)
 477 {
 478         struct mspro_sys_attr *x_attr = container_of(attr,
 479                                                      struct mspro_sys_attr,
 480                                                      dev_attr);
 481         struct mspro_devinfo *x_devinfo = x_attr->data;
 482         ssize_t rc = 0;
 483
 484         rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "cylinders: %x\n",
 485                         be16_to_cpu(x_devinfo->cylinders));
 486         rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "heads: %x\n",
 487                         be16_to_cpu(x_devinfo->heads));
 488         rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "bytes per track: %x\n",
 489                         be16_to_cpu(x_devinfo->bytes_per_track));
 490         rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "bytes per sector: %x\n",
 491                         be16_to_cpu(x_devinfo->bytes_per_sector));
 492         rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "sectors per track: %x\n",
 493                         be16_to_cpu(x_devinfo->sectors_per_track));
 494         return rc;
 495 }
 496
 497 static sysfs_show_t mspro_block_attr_show(unsigned char tag)
 498 {
 499         switch (tag) {
 500         case MSPRO_BLOCK_ID_SYSINFO:
 501                 return mspro_block_attr_show_sysinfo;
 502         case MSPRO_BLOCK_ID_MODELNAME:
 503                 return mspro_block_attr_show_modelname;
 504         case MSPRO_BLOCK_ID_MBR:
 505                 return mspro_block_attr_show_mbr;
 506         case MSPRO_BLOCK_ID_SPECFILEVALUES1:
 507         case MSPRO_BLOCK_ID_SPECFILEVALUES2:
 508                 return mspro_block_attr_show_specfile;
 509         case MSPRO_BLOCK_ID_DEVINFO:
 510                 return mspro_block_attr_show_devinfo;
 511         default:
 512                 return mspro_block_attr_show_default;
 513         }
 514 }
 515
 516 /*** Protocol handlers ***/
 517
 518 /*
 519  * Functions prefixed with "h_" are protocol callbacks. They can be called from
 520  * interrupt context. Return value of 0 means that request processing is still
 521  * ongoing, while special error value of -EAGAIN means that current request is
 522  * finished (and request processor should come back some time later).
 523  */
 524
 525 static int h_mspro_block_req_init(struct memstick_dev *card,
 526                                   struct memstick_request **mrq)
 527 {
 528         struct mspro_block_data *msb = memstick_get_drvdata(card);
 529
 530         *mrq = &card->current_mrq;
 531         card->next_request = msb->mrq_handler;
 532         return 0;
 533 }
 534
 535 static int h_mspro_block_default(struct memstick_dev *card,
 536                                  struct memstick_request **mrq)
 537 {
 538         return mspro_block_complete_req(card, (*mrq)->error);
 539 }
 540
 541 static int h_mspro_block_default_bad(struct memstick_dev *card,
 542                                      struct memstick_request **mrq)
 543 {
 544         return -ENXIO;
 545 }
 546
 547 static int h_mspro_block_get_ro(struct memstick_dev *card,
 548                                 struct memstick_request **mrq)
 549 {
 550         struct mspro_block_data *msb = memstick_get_drvdata(card);
 551
 552         if (!(*mrq)->error) {
 553                 if ((*mrq)->data[offsetof(struct ms_status_register, status0)]
 554                     & MEMSTICK_STATUS0_WP)
 555                         msb->read_only = 1;
 556                 else
 557                         msb->read_only = 0;
 558         }
 559
 560         return mspro_block_complete_req(card, (*mrq)->error);
 561 }
 562
 563 static int h_mspro_block_wait_for_ced(struct memstick_dev *card,
 564                                       struct memstick_request **mrq)
 565 {
 566         dev_dbg(&card->dev, "wait for ced: value %x\n", (*mrq)->data[0]);
 567
 568         if (!(*mrq)->error) {
 569                 if ((*mrq)->data[0] & (MEMSTICK_INT_CMDNAK | MEMSTICK_INT_ERR))
 570                         (*mrq)->error = -EFAULT;
 571                 else if (!((*mrq)->data[0] & MEMSTICK_INT_CED))
 572                         return 0;
 573         }
 574
 575         return mspro_block_complete_req(card, (*mrq)->error);
 576 }
 577
 578 static int h_mspro_block_transfer_data(struct memstick_dev *card,
 579                                        struct memstick_request **mrq)
 580 {
 581         struct mspro_block_data *msb = memstick_get_drvdata(card);
 582         unsigned char t_val = 0;
 583         struct scatterlist t_sg = { 0 };
 584         size_t t_offset;
 585
 586         if ((*mrq)->error)
 587                 return mspro_block_complete_req(card, (*mrq)->error);
 588
 589         switch ((*mrq)->tpc) {
 590         case MS_TPC_WRITE_REG:
 591                 memstick_init_req(*mrq, MS_TPC_SET_CMD, &msb->transfer_cmd, 1);
 592                 (*mrq)->need_card_int = 1;
 593                 return 0;
 594         case MS_TPC_SET_CMD:
 595                 t_val = (*mrq)->int_reg;
 596                 memstick_init_req(*mrq, MS_TPC_GET_INT, NULL, 1);
 597                 if (msb->caps & MEMSTICK_CAP_AUTO_GET_INT)
 598                         goto has_int_reg;
 599                 return 0;
 600         case MS_TPC_GET_INT:
 601                 t_val = (*mrq)->data[0];
 602 has_int_reg:
 603                 if (t_val & (MEMSTICK_INT_CMDNAK | MEMSTICK_INT_ERR)) {
 604                         t_val = MSPRO_CMD_STOP;
 605                         memstick_init_req(*mrq, MS_TPC_SET_CMD, &t_val, 1);
 606                         card->next_request = h_mspro_block_default;
 607                         return 0;
 608                 }
 609
 610                 if (msb->current_page
 611                     == (msb->req_sg[msb->current_seg].length
 612                         / msb->page_size)) {
 613                         msb->current_page = 0;
 614                         msb->current_seg++;
 615
 616                         if (msb->current_seg == msb->seg_count) {
 617                                 if (t_val & MEMSTICK_INT_CED) {
 618                                         return mspro_block_complete_req(card,
 619                                                                         0);
 620                                 } else {
 621                                         card->next_request
 622                                                 = h_mspro_block_wait_for_ced;
 623                                         memstick_init_req(*mrq, MS_TPC_GET_INT,
 624                                                           NULL, 1);
 625                                         return 0;
 626                                 }
 627                         }
 628                 }
 629
 630                 if (!(t_val & MEMSTICK_INT_BREQ)) {
 631                         memstick_init_req(*mrq, MS_TPC_GET_INT, NULL, 1);
 632                         return 0;
 633                 }
 634
 635                 t_offset = msb->req_sg[msb->current_seg].offset;
 636                 t_offset += msb->current_page * msb->page_size;
 637
 638                 sg_set_page(&t_sg,
 639                             nth_page(sg_page(&(msb->req_sg[msb->current_seg])),
 640                                      t_offset >> PAGE_SHIFT),
 641                             msb->page_size, offset_in_page(t_offset));
 642
 643                 memstick_init_req_sg(*mrq, msb->data_dir == READ
 644                                            ? MS_TPC_READ_LONG_DATA
 645                                            : MS_TPC_WRITE_LONG_DATA,
 646                                      &t_sg);
 647                 (*mrq)->need_card_int = 1;
 648                 return 0;
 649         case MS_TPC_READ_LONG_DATA:
 650         case MS_TPC_WRITE_LONG_DATA:
 651                 msb->current_page++;
 652                 if (msb->caps & MEMSTICK_CAP_AUTO_GET_INT) {
 653                         t_val = (*mrq)->int_reg;
 654                         goto has_int_reg;
 655                 } else {
 656                         memstick_init_req(*mrq, MS_TPC_GET_INT, NULL, 1);
 657                         return 0;
 658                 }
 659
 660         default:
 661                 BUG();
 662         }
 663 }
 664
 665 /*** Transfer setup functions for different access methods. ***/
 666
 667 /** Setup data transfer request for SET_CMD TPC with arguments in card
 668  *  registers.
 669  *
 670  *  @card    Current media instance
 671  *  @offset  Target data offset in bytes
 672  *  @length  Required transfer length in bytes.
 673  */
 674 static void h_mspro_block_setup_cmd(struct memstick_dev *card, u64 offset,
 675                                     size_t length)
 676 {
 677         struct mspro_block_data *msb = memstick_get_drvdata(card);
 678         struct mspro_param_register param = {
 679                 .system = msb->system,
 680                 .data_count = cpu_to_be16((uint16_t)(length / msb->page_size)),
 681                 /* ISO C90 warning precludes direct initialization for now. */
 682                 .data_address = 0,
 683                 .tpc_param = 0
 684         };
 685
 686         do_div(offset, msb->page_size);
 687         param.data_address = cpu_to_be32((uint32_t)offset);
 688
 689         card->next_request = h_mspro_block_req_init;
 690         msb->mrq_handler = h_mspro_block_transfer_data;
 691         memstick_init_req(&card->current_mrq, MS_TPC_WRITE_REG,
 692                           &param, sizeof(param));
 693 }
 694
 695 /*** Data transfer ***/
 696
 697 static int mspro_block_issue_req(struct memstick_dev *card, bool chunk)
 698 {
 699         struct mspro_block_data *msb = memstick_get_drvdata(card);
 700         u64 t_off;
 701         unsigned int count;
 702
 703         while (chunk) {
 704                 msb->current_page = 0;
 705                 msb->current_seg = 0;
 706                 msb->seg_count = blk_rq_map_sg(msb->block_req->q,
 707                                                msb->block_req,
 708                                                msb->req_sg);
 709
 710                 if (!msb->seg_count) {
 711                         unsigned int bytes = blk_rq_cur_bytes(msb->block_req);
 712
 713                         chunk = blk_update_request(msb->block_req,
 714                                                         BLK_STS_RESOURCE,
 715                                                         bytes);
 716                         if (chunk)
 717                                 continue;
 718                         __blk_mq_end_request(msb->block_req,
 719                                                 BLK_STS_RESOURCE);
 720                         msb->block_req = NULL;
 721                         break;
 722                 }
 723
 724                 t_off = blk_rq_pos(msb->block_req);
 725                 t_off <<= 9;
 726                 count = blk_rq_bytes(msb->block_req);
 727
 728                 msb->setup_transfer(card, t_off, count);
 729
 730                 msb->data_dir = rq_data_dir(msb->block_req);
 731                 msb->transfer_cmd = msb->data_dir == READ
 732                                     ? MSPRO_CMD_READ_DATA
 733                                     : MSPRO_CMD_WRITE_DATA;
 734
 735                 memstick_new_req(card->host);
 736                 return 0;
 737         }
 738
 739         return 1;
 740 }
 741
 742 static int mspro_block_complete_req(struct memstick_dev *card, int error)
 743 {
 744         struct mspro_block_data *msb = memstick_get_drvdata(card);
 745         int cnt;
 746         bool chunk;
 747         unsigned int t_len = 0;
 748         unsigned long flags;
 749
 750         spin_lock_irqsave(&msb->q_lock, flags);
 751         dev_dbg(&card->dev, "complete %d, %d\n", msb->block_req ? 1 : 0,
 752                 error);
 753
 754         if (msb->block_req) {
 755                 /* Nothing to do - not really an error */
 756                 if (error == -EAGAIN)
 757                         error = 0;
 758
 759                 if (error || (card->current_mrq.tpc == MSPRO_CMD_STOP)) {
 760                         if (msb->data_dir == READ) {
 761                                 for (cnt = 0; cnt < msb->current_seg; cnt++) {
 762                                         t_len += msb->req_sg[cnt].length
 763                                                  / msb->page_size;
 764
 765                                         if (msb->current_page)
 766                                                 t_len += msb->current_page - 1;
 767
 768                                         t_len *= msb->page_size;
 769                                 }
 770                         }
 771                 } else
 772                         t_len = blk_rq_bytes(msb->block_req);
 773
 774                 dev_dbg(&card->dev, "transferred %x (%d)\n", t_len, error);
 775
 776                 if (error && !t_len)
 777                         t_len = blk_rq_cur_bytes(msb->block_req);
 778
 779                 chunk = blk_update_request(msb->block_req,
 780                                 errno_to_blk_status(error), t_len);
 781                 if (chunk) {
 782                         error = mspro_block_issue_req(card, chunk);
 783                         if (!error)
 784                                 goto out;
 785                 } else {
 786                         __blk_mq_end_request(msb->block_req,
 787                                                 errno_to_blk_status(error));
 788                         msb->block_req = NULL;
 789                 }
 790         } else {
 791                 if (!error)
 792                         error = -EAGAIN;
 793         }
 794
 795         card->next_request = h_mspro_block_default_bad;
 796         complete_all(&card->mrq_complete);
 797 out:
 798         spin_unlock_irqrestore(&msb->q_lock, flags);
 799         return error;
 800 }
 801
 802 static void mspro_block_stop(struct memstick_dev *card)
 803 {
 804         struct mspro_block_data *msb = memstick_get_drvdata(card);
 805         int rc = 0;
 806         unsigned long flags;
 807
 808         while (1) {
 809                 spin_lock_irqsave(&msb->q_lock, flags);
 810                 if (!msb->block_req) {
 811                         blk_mq_stop_hw_queues(msb->queue);
 812                         rc = 1;
 813                 }
 814                 spin_unlock_irqrestore(&msb->q_lock, flags);
 815
 816                 if (rc)
 817                         break;
 818
 819                 wait_for_completion(&card->mrq_complete);
 820         }
 821 }
 822
 823 static void mspro_block_start(struct memstick_dev *card)
 824 {
 825         struct mspro_block_data *msb = memstick_get_drvdata(card);
 826
 827         blk_mq_start_hw_queues(msb->queue);
 828 }
 829
 830 static blk_status_t mspro_queue_rq(struct blk_mq_hw_ctx *hctx,
 831                                    const struct blk_mq_queue_data *bd)
 832 {
 833         struct memstick_dev *card = hctx->queue->queuedata;
 834         struct mspro_block_data *msb = memstick_get_drvdata(card);
 835
 836         spin_lock_irq(&msb->q_lock);
 837
 838         if (msb->block_req) {
 839                 spin_unlock_irq(&msb->q_lock);
 840                 return BLK_STS_DEV_RESOURCE;
 841         }
 842
 843         if (msb->eject) {
 844                 spin_unlock_irq(&msb->q_lock);
 845                 blk_mq_start_request(bd->rq);
 846                 return BLK_STS_IOERR;
 847         }
 848
 849         msb->block_req = bd->rq;
 850         blk_mq_start_request(bd->rq);
 851
 852         if (mspro_block_issue_req(card, true))
 853                 msb->block_req = NULL;
 854
 855         spin_unlock_irq(&msb->q_lock);
 856         return BLK_STS_OK;
 857 }
 858
 859 /*** Initialization ***/
 860
 861 static int mspro_block_wait_for_ced(struct memstick_dev *card)
 862 {
 863         struct mspro_block_data *msb = memstick_get_drvdata(card);
 864
 865         card->next_request = h_mspro_block_req_init;
 866         msb->mrq_handler = h_mspro_block_wait_for_ced;
 867         memstick_init_req(&card->current_mrq, MS_TPC_GET_INT, NULL, 1);
 868         memstick_new_req(card->host);
 869         wait_for_completion(&card->mrq_complete);
 870         return card->current_mrq.error;
 871 }
 872
 873 static int mspro_block_set_interface(struct memstick_dev *card,
 874                                      unsigned char sys_reg)
 875 {
 876         struct memstick_host *host = card->host;
 877         struct mspro_block_data *msb = memstick_get_drvdata(card);
 878         struct mspro_param_register param = {
 879                 .system = sys_reg,
 880                 .data_count = 0,
 881                 .data_address = 0,
 882                 .tpc_param = 0
 883         };
 884
 885         card->next_request = h_mspro_block_req_init;
 886         msb->mrq_handler = h_mspro_block_default;
 887         memstick_init_req(&card->current_mrq, MS_TPC_WRITE_REG, &param,
 888                           sizeof(param));
 889         memstick_new_req(host);
 890         wait_for_completion(&card->mrq_complete);
 891         return card->current_mrq.error;
 892 }
 893
 894 static int mspro_block_switch_interface(struct memstick_dev *card)
 895 {
 896         struct memstick_host *host = card->host;
 897         struct mspro_block_data *msb = memstick_get_drvdata(card);
 898         int rc = 0;
 899
 900 try_again:
 901         if (msb->caps & MEMSTICK_CAP_PAR4)
 902                 rc = mspro_block_set_interface(card, MEMSTICK_SYS_PAR4);
 903         else
 904                 return 0;
 905
 906         if (rc) {
 907                 printk(KERN_WARNING
 908                        "%s: could not switch to 4-bit mode, error %d\n",
 909                        dev_name(&card->dev), rc);
 910                 return 0;
 911         }
 912
 913         msb->system = MEMSTICK_SYS_PAR4;
 914         host->set_param(host, MEMSTICK_INTERFACE, MEMSTICK_PAR4);
 915         printk(KERN_INFO "%s: switching to 4-bit parallel mode\n",
 916                dev_name(&card->dev));
 917
 918         if (msb->caps & MEMSTICK_CAP_PAR8) {
 919                 rc = mspro_block_set_interface(card, MEMSTICK_SYS_PAR8);
 920
 921                 if (!rc) {
 922                         msb->system = MEMSTICK_SYS_PAR8;
 923                         host->set_param(host, MEMSTICK_INTERFACE,
 924                                         MEMSTICK_PAR8);
 925                         printk(KERN_INFO
 926                                "%s: switching to 8-bit parallel mode\n",
 927                                dev_name(&card->dev));
 928                 } else
 929                         printk(KERN_WARNING
 930                                "%s: could not switch to 8-bit mode, error %d\n",
 931                                dev_name(&card->dev), rc);
 932         }
 933
 934         card->next_request = h_mspro_block_req_init;
 935         msb->mrq_handler = h_mspro_block_default;
 936         memstick_init_req(&card->current_mrq, MS_TPC_GET_INT, NULL, 1);
 937         memstick_new_req(card->host);
 938         wait_for_completion(&card->mrq_complete);
 939         rc = card->current_mrq.error;
 940
 941         if (rc) {
 942                 printk(KERN_WARNING
 943                        "%s: interface error, trying to fall back to serial\n",
 944                        dev_name(&card->dev));
 945                 msb->system = MEMSTICK_SYS_SERIAL;
 946                 host->set_param(host, MEMSTICK_POWER, MEMSTICK_POWER_OFF);
 947                 msleep(10);
 948                 host->set_param(host, MEMSTICK_POWER, MEMSTICK_POWER_ON);
 949                 host->set_param(host, MEMSTICK_INTERFACE, MEMSTICK_SERIAL);
 950
 951                 rc = memstick_set_rw_addr(card);
 952                 if (!rc)
 953                         rc = mspro_block_set_interface(card, msb->system);
 954
 955                 if (!rc) {
 956                         msleep(150);
 957                         rc = mspro_block_wait_for_ced(card);
 958                         if (rc)
 959                                 return rc;
 960
 961                         if (msb->caps & MEMSTICK_CAP_PAR8) {
 962                                 msb->caps &= ~MEMSTICK_CAP_PAR8;
 963                                 goto try_again;
 964                         }
 965                 }
 966         }
 967         return rc;
 968 }
 969
 970 /* Memory allocated for attributes by this function should be freed by
 971  * mspro_block_data_clear, no matter if the initialization process succeeded
 972  * or failed.
 973  */
 974 static int mspro_block_read_attributes(struct memstick_dev *card)
 975 {
 976         struct mspro_block_data *msb = memstick_get_drvdata(card);
 977         struct mspro_attribute *attr = NULL;
 978         struct mspro_sys_attr *s_attr = NULL;
 979         unsigned char *buffer = NULL;
 980         int cnt, rc, attr_count;
 981         /* While normally physical device offsets, represented here by
 982          * attr_offset and attr_len will be of large numeric types, we can be
 983          * sure, that attributes are close enough to the beginning of the
 984          * device, to save ourselves some trouble.
 985          */
 986         unsigned int addr, attr_offset = 0, attr_len = msb->page_size;
 987
 988         attr = kmalloc(msb->page_size, GFP_KERNEL);
 989         if (!attr)
 990                 return -ENOMEM;
 991
 992         sg_init_one(&msb->req_sg[0], attr, msb->page_size);
 993         msb->seg_count = 1;
 994         msb->current_seg = 0;
 995         msb->current_page = 0;
 996         msb->data_dir = READ;
 997         msb->transfer_cmd = MSPRO_CMD_READ_ATRB;
 998
 999         msb->setup_transfer(card, attr_offset, attr_len);
1000
1001         memstick_new_req(card->host);
1002         wait_for_completion(&card->mrq_complete);
1003         if (card->current_mrq.error) {
1004                 rc = card->current_mrq.error;
1005                 goto out_free_attr;
1006         }
1007
1008         if (be16_to_cpu(attr->signature) != MSPRO_BLOCK_SIGNATURE) {
1009                 printk(KERN_ERR "%s: unrecognized device signature %x\n",
1010                        dev_name(&card->dev), be16_to_cpu(attr->signature));
1011                 rc = -ENODEV;
1012                 goto out_free_attr;
1013         }
1014
1015         if (attr->count > MSPRO_BLOCK_MAX_ATTRIBUTES) {
1016                 printk(KERN_WARNING "%s: way too many attribute entries\n",
1017                        dev_name(&card->dev));
1018                 attr_count = MSPRO_BLOCK_MAX_ATTRIBUTES;
1019         } else
1020                 attr_count = attr->count;
1021
1022         msb->attr_group.attrs = kcalloc(attr_count + 1,
1023                                         sizeof(*msb->attr_group.attrs),
1024                                         GFP_KERNEL);
1025         if (!msb->attr_group.attrs) {
1026                 rc = -ENOMEM;
1027                 goto out_free_attr;
1028         }
1029         msb->attr_group.name = "media_attributes";
1030
1031         buffer = kmemdup(attr, attr_len, GFP_KERNEL);
1032         if (!buffer) {
1033                 rc = -ENOMEM;
1034                 goto out_free_attr;
1035         }
1036
1037         for (cnt = 0; cnt < attr_count; ++cnt) {
1038                 s_attr = kzalloc(sizeof(struct mspro_sys_attr), GFP_KERNEL);
1039                 if (!s_attr) {
1040                         rc = -ENOMEM;
1041                         goto out_free_buffer;
1042                 }
1043
1044                 msb->attr_group.attrs[cnt] = &s_attr->dev_attr.attr;
1045                 addr = be32_to_cpu(attr->entries[cnt].address);
1046                 s_attr->size = be32_to_cpu(attr->entries[cnt].size);
1047                 dev_dbg(&card->dev, "adding attribute %d: id %x, address %x, "
1048                         "size %zx\n", cnt, attr->entries[cnt].id, addr,
1049                         s_attr->size);
1050                 s_attr->id = attr->entries[cnt].id;
1051                 if (mspro_block_attr_name(s_attr->id))
1052                         snprintf(s_attr->name, sizeof(s_attr->name), "%s",
1053                                  mspro_block_attr_name(attr->entries[cnt].id));
1054                 else
1055                         snprintf(s_attr->name, sizeof(s_attr->name),
1056                                  "attr_x%02x", attr->entries[cnt].id);
1057
1058                 sysfs_attr_init(&s_attr->dev_attr.attr);
1059                 s_attr->dev_attr.attr.name = s_attr->name;
1060                 s_attr->dev_attr.attr.mode = S_IRUGO;
1061                 s_attr->dev_attr.show = mspro_block_attr_show(s_attr->id);
1062
1063                 if (!s_attr->size)
1064                         continue;
1065
1066                 s_attr->data = kmalloc(s_attr->size, GFP_KERNEL);
1067                 if (!s_attr->data) {
1068                         rc = -ENOMEM;
1069                         goto out_free_buffer;
1070                 }
1071
1072                 if (((addr / msb->page_size) == (attr_offset / msb->page_size))
1073                     && (((addr + s_attr->size - 1) / msb->page_size)
1074                         == (attr_offset / msb->page_size))) {
1075                         memcpy(s_attr->data, buffer + addr % msb->page_size,
1076                                s_attr->size);
1077                         continue;
1078                 }
1079
1080                 attr_offset = (addr / msb->page_size) * msb->page_size;
1081
1082                 if ((attr_offset + attr_len) < (addr + s_attr->size)) {
1083                         kfree(buffer);
1084                         attr_len = (((addr + s_attr->size) / msb->page_size)
1085                                     + 1 ) * msb->page_size - attr_offset;
1086                         buffer = kmalloc(attr_len, GFP_KERNEL);
1087                         if (!buffer) {
1088                                 rc = -ENOMEM;
1089                                 goto out_free_attr;
1090                         }
1091                 }
1092
1093                 sg_init_one(&msb->req_sg[0], buffer, attr_len);
1094                 msb->seg_count = 1;
1095                 msb->current_seg = 0;
1096                 msb->current_page = 0;
1097                 msb->data_dir = READ;
1098                 msb->transfer_cmd = MSPRO_CMD_READ_ATRB;
1099
1100                 dev_dbg(&card->dev, "reading attribute range %x, %x\n",
1101                         attr_offset, attr_len);
1102
1103                 msb->setup_transfer(card, attr_offset, attr_len);
1104                 memstick_new_req(card->host);
1105                 wait_for_completion(&card->mrq_complete);
1106                 if (card->current_mrq.error) {
1107                         rc = card->current_mrq.error;
1108                         goto out_free_buffer;
1109                 }
1110
1111                 memcpy(s_attr->data, buffer + addr % msb->page_size,
1112                        s_attr->size);
1113         }
1114
1115         rc = 0;
1116 out_free_buffer:
1117         kfree(buffer);
1118 out_free_attr:
1119         kfree(attr);
1120         return rc;
1121 }
1122
1123 static int mspro_block_init_card(struct memstick_dev *card)
1124 {
1125         struct mspro_block_data *msb = memstick_get_drvdata(card);
1126         struct memstick_host *host = card->host;
1127         int rc = 0;
1128
1129         msb->system = MEMSTICK_SYS_SERIAL;
1130         msb->setup_transfer = h_mspro_block_setup_cmd;
1131
1132         card->reg_addr.r_offset = offsetof(struct mspro_register, status);
1133         card->reg_addr.r_length = sizeof(struct ms_status_register);
1134         card->reg_addr.w_offset = offsetof(struct mspro_register, param);
1135         card->reg_addr.w_length = sizeof(struct mspro_param_register);
1136
1137         if (memstick_set_rw_addr(card))
1138                 return -EIO;
1139
1140         msb->caps = host->caps;
1141
1142         msleep(150);
1143         rc = mspro_block_wait_for_ced(card);
1144         if (rc)
1145                 return rc;
1146
1147         rc = mspro_block_switch_interface(card);
1148         if (rc)
1149                 return rc;
1150
1151         dev_dbg(&card->dev, "card activated\n");
1152         if (msb->system != MEMSTICK_SYS_SERIAL)
1153                 msb->caps |= MEMSTICK_CAP_AUTO_GET_INT;
1154
1155         card->next_request = h_mspro_block_req_init;
1156         msb->mrq_handler = h_mspro_block_get_ro;
1157         memstick_init_req(&card->current_mrq, MS_TPC_READ_REG, NULL,
1158                           sizeof(struct ms_status_register));
1159         memstick_new_req(card->host);
1160         wait_for_completion(&card->mrq_complete);
1161         if (card->current_mrq.error)
1162                 return card->current_mrq.error;
1163
1164         dev_dbg(&card->dev, "card r/w status %d\n", msb->read_only ? 0 : 1);
1165
1166         msb->page_size = 512;
1167         rc = mspro_block_read_attributes(card);
1168         if (rc)
1169                 return rc;
1170
1171         dev_dbg(&card->dev, "attributes loaded\n");
1172         return 0;
1173
1174 }
1175
1176 static const struct blk_mq_ops mspro_mq_ops = {
1177         .queue_rq       = mspro_queue_rq,
1178 };
1179
1180 static int mspro_block_init_disk(struct memstick_dev *card)
1181 {
1182         struct mspro_block_data *msb = memstick_get_drvdata(card);
1183         struct mspro_devinfo *dev_info = NULL;
1184         struct mspro_sys_info *sys_info = NULL;
1185         struct mspro_sys_attr *s_attr = NULL;
1186         int rc, disk_id;
1187         unsigned long capacity;
1188
1189         for (rc = 0; msb->attr_group.attrs[rc]; ++rc) {
1190                 s_attr = mspro_from_sysfs_attr(msb->attr_group.attrs[rc]);
1191
1192                 if (s_attr->id == MSPRO_BLOCK_ID_DEVINFO)
1193                         dev_info = s_attr->data;
1194                 else if (s_attr->id == MSPRO_BLOCK_ID_SYSINFO)
1195                         sys_info = s_attr->data;
1196         }
1197
1198         if (!dev_info || !sys_info)
1199                 return -ENODEV;
1200
1201         msb->cylinders = be16_to_cpu(dev_info->cylinders);
1202         msb->heads = be16_to_cpu(dev_info->heads);
1203         msb->sectors_per_track = be16_to_cpu(dev_info->sectors_per_track);
1204
1205         msb->page_size = be16_to_cpu(sys_info->unit_size);
1206
1207         mutex_lock(&mspro_block_disk_lock);
1208         disk_id = idr_alloc(&mspro_block_disk_idr, card, 0, 256, GFP_KERNEL);
1209         mutex_unlock(&mspro_block_disk_lock);
1210         if (disk_id < 0)
1211                 return disk_id;
1212
1213         msb->disk = alloc_disk(1 << MSPRO_BLOCK_PART_SHIFT);
1214         if (!msb->disk) {
1215                 rc = -ENOMEM;
1216                 goto out_release_id;
1217         }
1218
1219         msb->queue = blk_mq_init_sq_queue(&msb->tag_set, &mspro_mq_ops, 2,
1220                                                 BLK_MQ_F_SHOULD_MERGE);
1221         if (IS_ERR(msb->queue)) {
1222                 rc = PTR_ERR(msb->queue);
1223                 msb->queue = NULL;
1224                 goto out_put_disk;
1225         }
1226
1227         msb->queue->queuedata = card;
1228
1229         blk_queue_max_hw_sectors(msb->queue, MSPRO_BLOCK_MAX_PAGES);
1230         blk_queue_max_segments(msb->queue, MSPRO_BLOCK_MAX_SEGS);
1231         blk_queue_max_segment_size(msb->queue,
1232                                    MSPRO_BLOCK_MAX_PAGES * msb->page_size);
1233
1234         msb->disk->major = major;
1235         msb->disk->first_minor = disk_id << MSPRO_BLOCK_PART_SHIFT;
1236         msb->disk->fops = &ms_block_bdops;
1237         msb->usage_count = 1;
1238         msb->disk->private_data = msb;
1239         msb->disk->queue = msb->queue;
1240
1241         sprintf(msb->disk->disk_name, "mspblk%d", disk_id);
1242
1243         blk_queue_logical_block_size(msb->queue, msb->page_size);
1244
1245         capacity = be16_to_cpu(sys_info->user_block_count);
1246         capacity *= be16_to_cpu(sys_info->block_size);
1247         capacity *= msb->page_size >> 9;
1248         set_capacity(msb->disk, capacity);
1249         dev_dbg(&card->dev, "capacity set %ld\n", capacity);
1250
1251         device_add_disk(&card->dev, msb->disk, NULL);
1252         msb->active = 1;
1253         return 0;
1254
1255 out_put_disk:
1256         put_disk(msb->disk);
1257 out_release_id:
1258         mutex_lock(&mspro_block_disk_lock);
1259         idr_remove(&mspro_block_disk_idr, disk_id);
1260         mutex_unlock(&mspro_block_disk_lock);
1261         return rc;
1262 }
1263
1264 static void mspro_block_data_clear(struct mspro_block_data *msb)
1265 {
1266         int cnt;
1267         struct mspro_sys_attr *s_attr;
1268
1269         if (msb->attr_group.attrs) {
1270                 for (cnt = 0; msb->attr_group.attrs[cnt]; ++cnt) {
1271                         s_attr = mspro_from_sysfs_attr(msb->attr_group
1272                                                            .attrs[cnt]);
1273                         kfree(s_attr->data);
1274                         kfree(s_attr);
1275                 }
1276                 kfree(msb->attr_group.attrs);
1277         }
1278
1279         msb->card = NULL;
1280 }
1281
1282 static int mspro_block_check_card(struct memstick_dev *card)
1283 {
1284         struct mspro_block_data *msb = memstick_get_drvdata(card);
1285
1286         return (msb->active == 1);
1287 }
1288
1289 static int mspro_block_probe(struct memstick_dev *card)
1290 {
1291         struct mspro_block_data *msb;
1292         int rc = 0;
1293
1294         msb = kzalloc(sizeof(struct mspro_block_data), GFP_KERNEL);
1295         if (!msb)
1296                 return -ENOMEM;
1297         memstick_set_drvdata(card, msb);
1298         msb->card = card;
1299         spin_lock_init(&msb->q_lock);
1300
1301         rc = mspro_block_init_card(card);
1302
1303         if (rc)
1304                 goto out_free;
1305
1306         rc = sysfs_create_group(&card->dev.kobj, &msb->attr_group);
1307         if (rc)
1308                 goto out_free;
1309
1310         rc = mspro_block_init_disk(card);
1311         if (!rc) {
1312                 card->check = mspro_block_check_card;
1313                 card->stop = mspro_block_stop;
1314                 card->start = mspro_block_start;
1315                 return 0;
1316         }
1317
1318         sysfs_remove_group(&card->dev.kobj, &msb->attr_group);
1319 out_free:
1320         memstick_set_drvdata(card, NULL);
1321         mspro_block_data_clear(msb);
1322         kfree(msb);
1323         return rc;
1324 }
1325
1326 static void mspro_block_remove(struct memstick_dev *card)
1327 {
1328         struct mspro_block_data *msb = memstick_get_drvdata(card);
1329         unsigned long flags;
1330
1331         spin_lock_irqsave(&msb->q_lock, flags);
1332         msb->eject = 1;
1333         spin_unlock_irqrestore(&msb->q_lock, flags);
1334         blk_mq_start_hw_queues(msb->queue);
1335
1336         del_gendisk(msb->disk);
1337         dev_dbg(&card->dev, "mspro block remove\n");
1338
1339         blk_cleanup_queue(msb->queue);
1340         blk_mq_free_tag_set(&msb->tag_set);
1341         msb->queue = NULL;
1342
1343         sysfs_remove_group(&card->dev.kobj, &msb->attr_group);
1344
1345         mutex_lock(&mspro_block_disk_lock);
1346         mspro_block_data_clear(msb);
1347         mutex_unlock(&mspro_block_disk_lock);
1348
1349         mspro_block_disk_release(msb->disk);
1350         memstick_set_drvdata(card, NULL);
1351 }
1352
1353 #ifdef CONFIG_PM
1354
1355 static int mspro_block_suspend(struct memstick_dev *card, pm_message_t state)
1356 {
1357         struct mspro_block_data *msb = memstick_get_drvdata(card);
1358         unsigned long flags;
1359
1360         blk_mq_stop_hw_queues(msb->queue);
1361
1362         spin_lock_irqsave(&msb->q_lock, flags);
1363         msb->active = 0;
1364         spin_unlock_irqrestore(&msb->q_lock, flags);
1365
1366         return 0;
1367 }
1368
1369 static int mspro_block_resume(struct memstick_dev *card)
1370 {
1371         struct mspro_block_data *msb = memstick_get_drvdata(card);
1372         int rc = 0;
1373
1374 #ifdef CONFIG_MEMSTICK_UNSAFE_RESUME
1375
1376         struct mspro_block_data *new_msb;
1377         struct memstick_host *host = card->host;
1378         struct mspro_sys_attr *s_attr, *r_attr;
1379         unsigned char cnt;
1380
1381         mutex_lock(&host->lock);
1382         new_msb = kzalloc(sizeof(struct mspro_block_data), GFP_KERNEL);
1383         if (!new_msb) {
1384                 rc = -ENOMEM;
1385                 goto out_unlock;
1386         }
1387
1388         new_msb->card = card;
1389         memstick_set_drvdata(card, new_msb);
1390         if (mspro_block_init_card(card))
1391                 goto out_free;
1392
1393         for (cnt = 0; new_msb->attr_group.attrs[cnt]
1394                       && msb->attr_group.attrs[cnt]; ++cnt) {
1395                 s_attr = mspro_from_sysfs_attr(new_msb->attr_group.attrs[cnt]);
1396                 r_attr = mspro_from_sysfs_attr(msb->attr_group.attrs[cnt]);
1397
1398                 if (s_attr->id == MSPRO_BLOCK_ID_SYSINFO
1399                     && r_attr->id == s_attr->id) {
1400                         if (memcmp(s_attr->data, r_attr->data, s_attr->size))
1401                                 break;
1402
1403                         msb->active = 1;
1404                         break;
1405                 }
1406         }
1407
1408 out_free:
1409         memstick_set_drvdata(card, msb);
1410         mspro_block_data_clear(new_msb);
1411         kfree(new_msb);
1412 out_unlock:
1413         mutex_unlock(&host->lock);
1414
1415 #endif /* CONFIG_MEMSTICK_UNSAFE_RESUME */
1416
1417         blk_mq_start_hw_queues(msb->queue);
1418         return rc;
1419 }
1420
1421 #else
1422
1423 #define mspro_block_suspend NULL
1424 #define mspro_block_resume NULL
1425
1426 #endif /* CONFIG_PM */
1427
1428 static struct memstick_device_id mspro_block_id_tbl[] = {
1429         {MEMSTICK_MATCH_ALL, MEMSTICK_TYPE_PRO, MEMSTICK_CATEGORY_STORAGE_DUO,
1430          MEMSTICK_CLASS_DUO},
1431         {}
1432 };
1433
1434
1435 static struct memstick_driver mspro_block_driver = {
1436         .driver = {
1437                 .name  = DRIVER_NAME,
1438                 .owner = THIS_MODULE
1439         },
1440         .id_table = mspro_block_id_tbl,
1441         .probe    = mspro_block_probe,
1442         .remove   = mspro_block_remove,
1443         .suspend  = mspro_block_suspend,
1444         .resume   = mspro_block_resume
1445 };
1446
1447 static int __init mspro_block_init(void)
1448 {
1449         int rc = -ENOMEM;
1450
1451         rc = register_blkdev(major, DRIVER_NAME);
1452         if (rc < 0) {
1453                 printk(KERN_ERR DRIVER_NAME ": failed to register "
1454                        "major %d, error %d\n", major, rc);
1455                 return rc;
1456         }
1457         if (!major)
1458                 major = rc;
1459
1460         rc = memstick_register_driver(&mspro_block_driver);
1461         if (rc)
1462                 unregister_blkdev(major, DRIVER_NAME);
1463         return rc;
1464 }
1465
1466 static void __exit mspro_block_exit(void)
1467 {
1468         memstick_unregister_driver(&mspro_block_driver);
1469         unregister_blkdev(major, DRIVER_NAME);
1470         idr_destroy(&mspro_block_disk_idr);
1471 }
1472
1473 module_init(mspro_block_init);
1474 module_exit(mspro_block_exit);
1475
1476 MODULE_LICENSE("GPL");
1477 MODULE_AUTHOR("Alex Dubov");
1478 MODULE_DESCRIPTION("Sony MemoryStickPro block device driver");
1479 MODULE_DEVICE_TABLE(memstick, mspro_block_id_tbl);