drivers/mmc/card/block.c

   1 /*
   2  * Block driver for media (i.e., flash cards)
   3  *
   4  * Copyright 2002 Hewlett-Packard Company
   5  * Copyright 2005-2008 Pierre Ossman
   6  *
   7  * Use consistent with the GNU GPL is permitted,
   8  * provided that this copyright notice is
   9  * preserved in its entirety in all copies and derived works.
  10  *
  11  * HEWLETT-PACKARD COMPANY MAKES NO WARRANTIES, EXPRESSED OR IMPLIED,
  12  * AS TO THE USEFULNESS OR CORRECTNESS OF THIS CODE OR ITS
  13  * FITNESS FOR ANY PARTICULAR PURPOSE.
  14  *
  15  * Many thanks to Alessandro Rubini and Jonathan Corbet!
  16  *
  17  * Author:  Andrew Christian
  18  *          28 May 2002
  19  */
  20 #include <linux/moduleparam.h>
  21 #include <linux/module.h>
  22 #include <linux/init.h>
  23
  24 #include <linux/kernel.h>
  25 #include <linux/fs.h>
  26 #include <linux/slab.h>
  27 #include <linux/errno.h>
  28 #include <linux/hdreg.h>
  29 #include <linux/kdev_t.h>
  30 #include <linux/blkdev.h>
  31 #include <linux/mutex.h>
  32 #include <linux/scatterlist.h>
  33 #include <linux/string_helpers.h>
  34 #include <linux/delay.h>
  35 #include <linux/capability.h>
  36 #include <linux/compat.h>
  37 #include <linux/pm_runtime.h>
  38
  39 #include <trace/events/mmc.h>
  40
  41 #include <linux/mmc/ioctl.h>
  42 #include <linux/mmc/card.h>
  43 #include <linux/mmc/host.h>
  44 #include <linux/mmc/mmc.h>
  45 #include <linux/mmc/sd.h>
  46
  47 #include <asm/uaccess.h>
  48
  49 #include "queue.h"
  50
  51 MODULE_ALIAS("mmc:block");
  52 #ifdef MODULE_PARAM_PREFIX
  53 #undef MODULE_PARAM_PREFIX
  54 #endif
  55 #define MODULE_PARAM_PREFIX "mmcblk."
  56
  57 #define INAND_CMD38_ARG_EXT_CSD  113
  58 #define INAND_CMD38_ARG_ERASE    0x00
  59 #define INAND_CMD38_ARG_TRIM     0x01
  60 #define INAND_CMD38_ARG_SECERASE 0x80
  61 #define INAND_CMD38_ARG_SECTRIM1 0x81
  62 #define INAND_CMD38_ARG_SECTRIM2 0x88
  63 #define MMC_BLK_TIMEOUT_MS  (10 * 60 * 1000)        /* 10 minute timeout */
  64 #define MMC_SANITIZE_REQ_TIMEOUT 240000
  65 #define MMC_EXTRACT_INDEX_FROM_ARG(x) ((x & 0x00FF0000) >> 16)
  66
  67 #define mmc_req_rel_wr(req)     ((req->cmd_flags & REQ_FUA) && \
  68                                   (rq_data_dir(req) == WRITE))
  69 #define PACKED_CMD_VER  0x01
  70 #define PACKED_CMD_WR   0x02
  71
  72 static DEFINE_MUTEX(block_mutex);
  73
  74 /*
  75  * The defaults come from config options but can be overriden by module
  76  * or bootarg options.
  77  */
  78 static int perdev_minors = CONFIG_MMC_BLOCK_MINORS;
  79
  80 /*
  81  * We've only got one major, so number of mmcblk devices is
  82  * limited to (1 << 20) / number of minors per device.  It is also
  83  * currently limited by the size of the static bitmaps below.
  84  */
  85 static int max_devices;
  86
  87 #define MAX_DEVICES 256
  88
  89 /* TODO: Replace these with struct ida */
  90 static DECLARE_BITMAP(dev_use, MAX_DEVICES);
  91 static DECLARE_BITMAP(name_use, MAX_DEVICES);
  92
  93 /*
  94  * There is one mmc_blk_data per slot.
  95  */
  96 struct mmc_blk_data {
  97         spinlock_t      lock;
  98         struct gendisk  *disk;
  99         struct mmc_queue queue;
 100         struct list_head part;
 101
 102         unsigned int    flags;
 103 #define MMC_BLK_CMD23   (1 << 0)        /* Can do SET_BLOCK_COUNT for multiblock */
 104 #define MMC_BLK_REL_WR  (1 << 1)        /* MMC Reliable write support */
 105 #define MMC_BLK_PACKED_CMD      (1 << 2)        /* MMC packed command support */
 106
 107         unsigned int    usage;
 108         unsigned int    read_only;
 109         unsigned int    part_type;
 110         unsigned int    name_idx;
 111         unsigned int    reset_done;
 112 #define MMC_BLK_READ            BIT(0)
 113 #define MMC_BLK_WRITE           BIT(1)
 114 #define MMC_BLK_DISCARD         BIT(2)
 115 #define MMC_BLK_SECDISCARD      BIT(3)
 116
 117         /*
 118          * Only set in main mmc_blk_data associated
 119          * with mmc_card with dev_set_drvdata, and keeps
 120          * track of the current selected device partition.
 121          */
 122         unsigned int    part_curr;
 123         struct device_attribute force_ro;
 124         struct device_attribute power_ro_lock;
 125         int     area_type;
 126 };
 127
 128 static DEFINE_MUTEX(open_lock);
 129
 130 enum {
 131         MMC_PACKED_NR_IDX = -1,
 132         MMC_PACKED_NR_ZERO,
 133         MMC_PACKED_NR_SINGLE,
 134 };
 135
 136 module_param(perdev_minors, int, 0444);
 137 MODULE_PARM_DESC(perdev_minors, "Minors numbers to allocate per device");
 138
 139 static inline int mmc_blk_part_switch(struct mmc_card *card,
 140                                       struct mmc_blk_data *md);
 141 static int get_card_status(struct mmc_card *card, u32 *status, int retries);
 142
 143 static inline void mmc_blk_clear_packed(struct mmc_queue_req *mqrq)
 144 {
 145         struct mmc_packed *packed = mqrq->packed;
 146
 147         BUG_ON(!packed);
 148
 149         mqrq->cmd_type = MMC_PACKED_NONE;
 150         packed->nr_entries = MMC_PACKED_NR_ZERO;
 151         packed->idx_failure = MMC_PACKED_NR_IDX;
 152         packed->retries = 0;
 153         packed->blocks = 0;
 154 }
 155
 156 static struct mmc_blk_data *mmc_blk_get(struct gendisk *disk)
 157 {
 158         struct mmc_blk_data *md;
 159
 160         mutex_lock(&open_lock);
 161         md = disk->private_data;
 162         if (md && md->usage == 0)
 163                 md = NULL;
 164         if (md)
 165                 md->usage++;
 166         mutex_unlock(&open_lock);
 167
 168         return md;
 169 }
 170
 171 static inline int mmc_get_devidx(struct gendisk *disk)
 172 {
 173         int devidx = disk->first_minor / perdev_minors;
 174         return devidx;
 175 }
 176
 177 static void mmc_blk_put(struct mmc_blk_data *md)
 178 {
 179         mutex_lock(&open_lock);
 180         md->usage--;
 181         if (md->usage == 0) {
 182                 int devidx = mmc_get_devidx(md->disk);
 183                 blk_cleanup_queue(md->queue.queue);
 184
 185                 __clear_bit(devidx, dev_use);
 186
 187                 put_disk(md->disk);
 188                 kfree(md);
 189         }
 190         mutex_unlock(&open_lock);
 191 }
 192
 193 static ssize_t power_ro_lock_show(struct device *dev,
 194                 struct device_attribute *attr, char *buf)
 195 {
 196         int ret;
 197         struct mmc_blk_data *md = mmc_blk_get(dev_to_disk(dev));
 198         struct mmc_card *card = md->queue.card;
 199         int locked = 0;
 200
 201         if (card->ext_csd.boot_ro_lock & EXT_CSD_BOOT_WP_B_PERM_WP_EN)
 202                 locked = 2;
 203         else if (card->ext_csd.boot_ro_lock & EXT_CSD_BOOT_WP_B_PWR_WP_EN)
 204                 locked = 1;
 205
 206         ret = snprintf(buf, PAGE_SIZE, "%d\n", locked);
 207
 208         mmc_blk_put(md);
 209
 210         return ret;
 211 }
 212
 213 static ssize_t power_ro_lock_store(struct device *dev,
 214                 struct device_attribute *attr, const char *buf, size_t count)
 215 {
 216         int ret;
 217         struct mmc_blk_data *md, *part_md;
 218         struct mmc_card *card;
 219         unsigned long set;
 220
 221         if (kstrtoul(buf, 0, &set))
 222                 return -EINVAL;
 223
 224         if (set != 1)
 225                 return count;
 226
 227         md = mmc_blk_get(dev_to_disk(dev));
 228         card = md->queue.card;
 229
 230         mmc_get_card(card);
 231
 232         ret = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_BOOT_WP,
 233                                 card->ext_csd.boot_ro_lock |
 234                                 EXT_CSD_BOOT_WP_B_PWR_WP_EN,
 235                                 card->ext_csd.part_time);
 236         if (ret)
 237                 pr_err("%s: Locking boot partition ro until next power on failed: %d\n", md->disk->disk_name, ret);
 238         else
 239                 card->ext_csd.boot_ro_lock |= EXT_CSD_BOOT_WP_B_PWR_WP_EN;
 240
 241         mmc_put_card(card);
 242
 243         if (!ret) {
 244                 pr_info("%s: Locking boot partition ro until next power on\n",
 245                         md->disk->disk_name);
 246                 set_disk_ro(md->disk, 1);
 247
 248                 list_for_each_entry(part_md, &md->part, part)
 249                         if (part_md->area_type == MMC_BLK_DATA_AREA_BOOT) {
 250                                 pr_info("%s: Locking boot partition ro until next power on\n", part_md->disk->disk_name);
 251                                 set_disk_ro(part_md->disk, 1);
 252                         }
 253         }
 254
 255         mmc_blk_put(md);
 256         return count;
 257 }
 258
 259 static ssize_t force_ro_show(struct device *dev, struct device_attribute *attr,
 260                              char *buf)
 261 {
 262         int ret;
 263         struct mmc_blk_data *md = mmc_blk_get(dev_to_disk(dev));
 264
 265         ret = snprintf(buf, PAGE_SIZE, "%d\n",
 266                        get_disk_ro(dev_to_disk(dev)) ^
 267                        md->read_only);
 268         mmc_blk_put(md);
 269         return ret;
 270 }
 271
 272 static ssize_t force_ro_store(struct device *dev, struct device_attribute *attr,
 273                               const char *buf, size_t count)
 274 {
 275         int ret;
 276         char *end;
 277         struct mmc_blk_data *md = mmc_blk_get(dev_to_disk(dev));
 278         unsigned long set = simple_strtoul(buf, &end, 0);
 279         if (end == buf) {
 280                 ret = -EINVAL;
 281                 goto out;
 282         }
 283
 284         set_disk_ro(dev_to_disk(dev), set || md->read_only);
 285         ret = count;
 286 out:
 287         mmc_blk_put(md);
 288         return ret;
 289 }
 290
 291 static int mmc_blk_open(struct block_device *bdev, fmode_t mode)
 292 {
 293         struct mmc_blk_data *md = mmc_blk_get(bdev->bd_disk);
 294         int ret = -ENXIO;
 295
 296         mutex_lock(&block_mutex);
 297         if (md) {
 298                 if (md->usage == 2)
 299                         check_disk_change(bdev);
 300                 ret = 0;
 301
 302                 if ((mode & FMODE_WRITE) && md->read_only) {
 303                         mmc_blk_put(md);
 304                         ret = -EROFS;
 305                 }
 306         }
 307         mutex_unlock(&block_mutex);
 308
 309         return ret;
 310 }
 311
 312 static void mmc_blk_release(struct gendisk *disk, fmode_t mode)
 313 {
 314         struct mmc_blk_data *md = disk->private_data;
 315
 316         mutex_lock(&block_mutex);
 317         mmc_blk_put(md);
 318         mutex_unlock(&block_mutex);
 319 }
 320
 321 static int
 322 mmc_blk_getgeo(struct block_device *bdev, struct hd_geometry *geo)
 323 {
 324         geo->cylinders = get_capacity(bdev->bd_disk) / (4 * 16);
 325         geo->heads = 4;
 326         geo->sectors = 16;
 327         return 0;
 328 }
 329
 330 struct mmc_blk_ioc_data {
 331         struct mmc_ioc_cmd ic;
 332         unsigned char *buf;
 333         u64 buf_bytes;
 334 };
 335
 336 static struct mmc_blk_ioc_data *mmc_blk_ioctl_copy_from_user(
 337         struct mmc_ioc_cmd __user *user)
 338 {
 339         struct mmc_blk_ioc_data *idata;
 340         int err;
 341
 342         idata = kzalloc(sizeof(*idata), GFP_KERNEL);
 343         if (!idata) {
 344                 err = -ENOMEM;
 345                 goto out;
 346         }
 347
 348         if (copy_from_user(&idata->ic, user, sizeof(idata->ic))) {
 349                 err = -EFAULT;
 350                 goto idata_err;
 351         }
 352
 353         idata->buf_bytes = (u64) idata->ic.blksz * idata->ic.blocks;
 354         if (idata->buf_bytes > MMC_IOC_MAX_BYTES) {
 355                 err = -EOVERFLOW;
 356                 goto idata_err;
 357         }
 358
 359         if (!idata->buf_bytes)
 360                 return idata;
 361
 362         idata->buf = kzalloc(idata->buf_bytes, GFP_KERNEL);
 363         if (!idata->buf) {
 364                 err = -ENOMEM;
 365                 goto idata_err;
 366         }
 367
 368         if (copy_from_user(idata->buf, (void __user *)(unsigned long)
 369                                         idata->ic.data_ptr, idata->buf_bytes)) {
 370                 err = -EFAULT;
 371                 goto copy_err;
 372         }
 373
 374         return idata;
 375
 376 copy_err:
 377         kfree(idata->buf);
 378 idata_err:
 379         kfree(idata);
 380 out:
 381         return ERR_PTR(err);
 382 }
 383
 384 static int mmc_blk_ioctl_copy_to_user(struct mmc_ioc_cmd __user *ic_ptr,
 385                                       struct mmc_blk_ioc_data *idata)
 386 {
 387         struct mmc_ioc_cmd *ic = &idata->ic;
 388
 389         if (copy_to_user(&(ic_ptr->response), ic->response,
 390                          sizeof(ic->response)))
 391                 return -EFAULT;
 392
 393         if (!idata->ic.write_flag) {
 394                 if (copy_to_user((void __user *)(unsigned long)ic->data_ptr,
 395                                  idata->buf, idata->buf_bytes))
 396                         return -EFAULT;
 397         }
 398
 399         return 0;
 400 }
 401
 402 static int ioctl_rpmb_card_status_poll(struct mmc_card *card, u32 *status,
 403                                        u32 retries_max)
 404 {
 405         int err;
 406         u32 retry_count = 0;
 407
 408         if (!status || !retries_max)
 409                 return -EINVAL;
 410
 411         do {
 412                 err = get_card_status(card, status, 5);
 413                 if (err)
 414                         break;
 415
 416                 if (!R1_STATUS(*status) &&
 417                                 (R1_CURRENT_STATE(*status) != R1_STATE_PRG))
 418                         break; /* RPMB programming operation complete */
 419
 420                 /*
 421                  * Rechedule to give the MMC device a chance to continue
 422                  * processing the previous command without being polled too
 423                  * frequently.
 424                  */
 425                 usleep_range(1000, 5000);
 426         } while (++retry_count < retries_max);
 427
 428         if (retry_count == retries_max)
 429                 err = -EPERM;
 430
 431         return err;
 432 }
 433
 434 static int ioctl_do_sanitize(struct mmc_card *card)
 435 {
 436         int err;
 437
 438         if (!mmc_can_sanitize(card)) {
 439                         pr_warn("%s: %s - SANITIZE is not supported\n",
 440                                 mmc_hostname(card->host), __func__);
 441                         err = -EOPNOTSUPP;
 442                         goto out;
 443         }
 444
 445         pr_debug("%s: %s - SANITIZE IN PROGRESS...\n",
 446                 mmc_hostname(card->host), __func__);
 447
 448         trace_mmc_blk_erase_start(EXT_CSD_SANITIZE_START, 0, 0);
 449         err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
 450                                         EXT_CSD_SANITIZE_START, 1,
 451                                         MMC_SANITIZE_REQ_TIMEOUT);
 452         trace_mmc_blk_erase_end(EXT_CSD_SANITIZE_START, 0, 0);
 453
 454         if (err)
 455                 pr_err("%s: %s - EXT_CSD_SANITIZE_START failed. err=%d\n",
 456                        mmc_hostname(card->host), __func__, err);
 457
 458         pr_debug("%s: %s - SANITIZE COMPLETED\n", mmc_hostname(card->host),
 459                                              __func__);
 460 out:
 461         return err;
 462 }
 463
 464 static int __mmc_blk_ioctl_cmd(struct mmc_card *card, struct mmc_blk_data *md,
 465                                struct mmc_blk_ioc_data *idata)
 466 {
 467         struct mmc_command cmd = {0};
 468         struct mmc_data data = {0};
 469         struct mmc_request mrq = {NULL};
 470         struct scatterlist sg;
 471         int err;
 472         int is_rpmb = false;
 473         u32 status = 0;
 474
 475         if (!card || !md || !idata)
 476                 return -EINVAL;
 477
 478         if (md->area_type & MMC_BLK_DATA_AREA_RPMB)
 479                 is_rpmb = true;
 480
 481         cmd.opcode = idata->ic.opcode;
 482         cmd.arg = idata->ic.arg;
 483         cmd.flags = idata->ic.flags;
 484
 485         if (idata->buf_bytes) {
 486                 data.sg = &sg;
 487                 data.sg_len = 1;
 488                 data.blksz = idata->ic.blksz;
 489                 data.blocks = idata->ic.blocks;
 490
 491                 sg_init_one(data.sg, idata->buf, idata->buf_bytes);
 492
 493                 if (idata->ic.write_flag)
 494                         data.flags = MMC_DATA_WRITE;
 495                 else
 496                         data.flags = MMC_DATA_READ;
 497
 498                 /* data.flags must already be set before doing this. */
 499                 mmc_set_data_timeout(&data, card);
 500
 501                 /* Allow overriding the timeout_ns for empirical tuning. */
 502                 if (idata->ic.data_timeout_ns)
 503                         data.timeout_ns = idata->ic.data_timeout_ns;
 504
 505                 if ((cmd.flags & MMC_RSP_R1B) == MMC_RSP_R1B) {
 506                         /*
 507                          * Pretend this is a data transfer and rely on the
 508                          * host driver to compute timeout.  When all host
 509                          * drivers support cmd.cmd_timeout for R1B, this
 510                          * can be changed to:
 511                          *
 512                          *     mrq.data = NULL;
 513                          *     cmd.cmd_timeout = idata->ic.cmd_timeout_ms;
 514                          */
 515                         data.timeout_ns = idata->ic.cmd_timeout_ms * 1000000;
 516                 }
 517
 518                 mrq.data = &data;
 519         }
 520
 521         mrq.cmd = &cmd;
 522
 523         err = mmc_blk_part_switch(card, md);
 524         if (err)
 525                 return err;
 526
 527         if (idata->ic.is_acmd) {
 528                 err = mmc_app_cmd(card->host, card);
 529                 if (err)
 530                         return err;
 531         }
 532
 533         if (is_rpmb) {
 534                 err = mmc_set_blockcount(card, data.blocks,
 535                         idata->ic.write_flag & (1 << 31));
 536                 if (err)
 537                         return err;
 538         }
 539
 540         if ((MMC_EXTRACT_INDEX_FROM_ARG(cmd.arg) == EXT_CSD_SANITIZE_START) &&
 541             (cmd.opcode == MMC_SWITCH)) {
 542                 err = ioctl_do_sanitize(card);
 543
 544                 if (err)
 545                         pr_err("%s: ioctl_do_sanitize() failed. err = %d",
 546                                __func__, err);
 547
 548                 return err;
 549         }
 550
 551         mmc_wait_for_req(card->host, &mrq);
 552
 553         if (cmd.error) {
 554                 dev_err(mmc_dev(card->host), "%s: cmd error %d\n",
 555                                                 __func__, cmd.error);
 556                 return cmd.error;
 557         }
 558         if (data.error) {
 559                 dev_err(mmc_dev(card->host), "%s: data error %d\n",
 560                                                 __func__, data.error);
 561                 return data.error;
 562         }
 563
 564         /*
 565          * According to the SD specs, some commands require a delay after
 566          * issuing the command.
 567          */
 568         if (idata->ic.postsleep_min_us)
 569                 usleep_range(idata->ic.postsleep_min_us, idata->ic.postsleep_max_us);
 570
 571         memcpy(&(idata->ic.response), cmd.resp, sizeof(cmd.resp));
 572
 573         if (is_rpmb) {
 574                 /*
 575                  * Ensure RPMB command has completed by polling CMD13
 576                  * "Send Status".
 577                  */
 578                 err = ioctl_rpmb_card_status_poll(card, &status, 5);
 579                 if (err)
 580                         dev_err(mmc_dev(card->host),
 581                                         "%s: Card Status=0x%08X, error %d\n",
 582                                         __func__, status, err);
 583         }
 584
 585         return err;
 586 }
 587
 588 static int mmc_blk_ioctl_cmd(struct block_device *bdev,
 589                              struct mmc_ioc_cmd __user *ic_ptr)
 590 {
 591         struct mmc_blk_ioc_data *idata;
 592         struct mmc_blk_data *md;
 593         struct mmc_card *card;
 594         int err = 0, ioc_err = 0;
 595
 596         idata = mmc_blk_ioctl_copy_from_user(ic_ptr);
 597         if (IS_ERR(idata))
 598                 return PTR_ERR(idata);
 599
 600         md = mmc_blk_get(bdev->bd_disk);
 601         if (!md) {
 602                 err = -EINVAL;
 603                 goto cmd_err;
 604         }
 605
 606         card = md->queue.card;
 607         if (IS_ERR(card)) {
 608                 err = PTR_ERR(card);
 609                 goto cmd_done;
 610         }
 611
 612         mmc_get_card(card);
 613
 614         ioc_err = __mmc_blk_ioctl_cmd(card, md, idata);
 615
 616         mmc_put_card(card);
 617
 618         err = mmc_blk_ioctl_copy_to_user(ic_ptr, idata);
 619
 620 cmd_done:
 621         mmc_blk_put(md);
 622 cmd_err:
 623         kfree(idata->buf);
 624         kfree(idata);
 625         return ioc_err ? ioc_err : err;
 626 }
 627
 628 static int mmc_blk_ioctl_multi_cmd(struct block_device *bdev,
 629                                    struct mmc_ioc_multi_cmd __user *user)
 630 {
 631         struct mmc_blk_ioc_data **idata = NULL;
 632         struct mmc_ioc_cmd __user *cmds = user->cmds;
 633         struct mmc_card *card;
 634         struct mmc_blk_data *md;
 635         int i, err = 0, ioc_err = 0;
 636         __u64 num_of_cmds;
 637
 638         if (copy_from_user(&num_of_cmds, &user->num_of_cmds,
 639                            sizeof(num_of_cmds)))
 640                 return -EFAULT;
 641
 642         if (num_of_cmds > MMC_IOC_MAX_CMDS)
 643                 return -EINVAL;
 644
 645         idata = kcalloc(num_of_cmds, sizeof(*idata), GFP_KERNEL);
 646         if (!idata)
 647                 return -ENOMEM;
 648
 649         for (i = 0; i < num_of_cmds; i++) {
 650                 idata[i] = mmc_blk_ioctl_copy_from_user(&cmds[i]);
 651                 if (IS_ERR(idata[i])) {
 652                         err = PTR_ERR(idata[i]);
 653                         num_of_cmds = i;
 654                         goto cmd_err;
 655                 }
 656         }
 657
 658         md = mmc_blk_get(bdev->bd_disk);
 659         if (!md)
 660                 goto cmd_err;
 661
 662         card = md->queue.card;
 663         if (IS_ERR(card)) {
 664                 err = PTR_ERR(card);
 665                 goto cmd_done;
 666         }
 667
 668         mmc_get_card(card);
 669
 670         for (i = 0; i < num_of_cmds && !ioc_err; i++)
 671                 ioc_err = __mmc_blk_ioctl_cmd(card, md, idata[i]);
 672
 673         mmc_put_card(card);
 674
 675         /* copy to user if data and response */
 676         for (i = 0; i < num_of_cmds && !err; i++)
 677                 err = mmc_blk_ioctl_copy_to_user(&cmds[i], idata[i]);
 678
 679 cmd_done:
 680         mmc_blk_put(md);
 681 cmd_err:
 682         for (i = 0; i < num_of_cmds; i++) {
 683                 kfree(idata[i]->buf);
 684                 kfree(idata[i]);
 685         }
 686         kfree(idata);
 687         return ioc_err ? ioc_err : err;
 688 }
 689
 690 static int mmc_blk_ioctl(struct block_device *bdev, fmode_t mode,
 691         unsigned int cmd, unsigned long arg)
 692 {
 693 #ifdef CONFIG_ARCH_ROCKCHIP
 694         if (cmd != MMC_IOC_CMD && cmd != MMC_IOC_MULTI_CMD)
 695                 return -EINVAL;
 696 #endif
 697
 698         /*
 699          * The caller must have CAP_SYS_RAWIO, and must be calling this on the
 700          * whole block device, not on a partition.  This prevents overspray
 701          * between sibling partitions.
 702          */
 703         if ((!capable(CAP_SYS_RAWIO)) || (bdev != bdev->bd_contains))
 704                 return -EPERM;
 705
 706         switch (cmd) {
 707         case MMC_IOC_CMD:
 708                 return mmc_blk_ioctl_cmd(bdev,
 709                                 (struct mmc_ioc_cmd __user *)arg);
 710         case MMC_IOC_MULTI_CMD:
 711                 return mmc_blk_ioctl_multi_cmd(bdev,
 712                                 (struct mmc_ioc_multi_cmd __user *)arg);
 713         default:
 714                 return -EINVAL;
 715         }
 716 }
 717
 718 #ifdef CONFIG_COMPAT
 719 static int mmc_blk_compat_ioctl(struct block_device *bdev, fmode_t mode,
 720         unsigned int cmd, unsigned long arg)
 721 {
 722         return mmc_blk_ioctl(bdev, mode, cmd, (unsigned long) compat_ptr(arg));
 723 }
 724 #endif
 725
 726 static const struct block_device_operations mmc_bdops = {
 727         .open                   = mmc_blk_open,
 728         .release                = mmc_blk_release,
 729         .getgeo                 = mmc_blk_getgeo,
 730         .owner                  = THIS_MODULE,
 731         .ioctl                  = mmc_blk_ioctl,
 732 #ifdef CONFIG_COMPAT
 733         .compat_ioctl           = mmc_blk_compat_ioctl,
 734 #endif
 735 };
 736
 737 static inline int mmc_blk_part_switch(struct mmc_card *card,
 738                                       struct mmc_blk_data *md)
 739 {
 740         int ret;
 741         struct mmc_blk_data *main_md = dev_get_drvdata(&card->dev);
 742
 743         if (main_md->part_curr == md->part_type)
 744                 return 0;
 745
 746         if (mmc_card_mmc(card)) {
 747                 u8 part_config = card->ext_csd.part_config;
 748
 749                 part_config &= ~EXT_CSD_PART_CONFIG_ACC_MASK;
 750                 part_config |= md->part_type;
 751
 752                 ret = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
 753                                  EXT_CSD_PART_CONFIG, part_config,
 754                                  card->ext_csd.part_time);
 755                 if (ret)
 756                         return ret;
 757
 758                 card->ext_csd.part_config = part_config;
 759         }
 760
 761         main_md->part_curr = md->part_type;
 762         return 0;
 763 }
 764
 765 static u32 mmc_sd_num_wr_blocks(struct mmc_card *card)
 766 {
 767         int err;
 768         u32 result;
 769         __be32 *blocks;
 770
 771         struct mmc_request mrq = {NULL};
 772         struct mmc_command cmd = {0};
 773         struct mmc_data data = {0};
 774
 775         struct scatterlist sg;
 776
 777         cmd.opcode = MMC_APP_CMD;
 778         cmd.arg = card->rca << 16;
 779         cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC;
 780
 781         err = mmc_wait_for_cmd(card->host, &cmd, 0);
 782         if (err)
 783                 return (u32)-1;
 784         if (!mmc_host_is_spi(card->host) && !(cmd.resp[0] & R1_APP_CMD))
 785                 return (u32)-1;
 786
 787         memset(&cmd, 0, sizeof(struct mmc_command));
 788
 789         cmd.opcode = SD_APP_SEND_NUM_WR_BLKS;
 790         cmd.arg = 0;
 791         cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC;
 792
 793         data.blksz = 4;
 794         data.blocks = 1;
 795         data.flags = MMC_DATA_READ;
 796         data.sg = &sg;
 797         data.sg_len = 1;
 798         mmc_set_data_timeout(&data, card);
 799
 800         mrq.cmd = &cmd;
 801         mrq.data = &data;
 802
 803         blocks = kmalloc(4, GFP_KERNEL);
 804         if (!blocks)
 805                 return (u32)-1;
 806
 807         sg_init_one(&sg, blocks, 4);
 808
 809         mmc_wait_for_req(card->host, &mrq);
 810
 811         result = ntohl(*blocks);
 812         kfree(blocks);
 813
 814         if (cmd.error || data.error)
 815                 result = (u32)-1;
 816
 817         return result;
 818 }
 819
 820 static int get_card_status(struct mmc_card *card, u32 *status, int retries)
 821 {
 822         struct mmc_command cmd = {0};
 823         int err;
 824
 825         cmd.opcode = MMC_SEND_STATUS;
 826         if (!mmc_host_is_spi(card->host))
 827                 cmd.arg = card->rca << 16;
 828         cmd.flags = MMC_RSP_SPI_R2 | MMC_RSP_R1 | MMC_CMD_AC;
 829         err = mmc_wait_for_cmd(card->host, &cmd, retries);
 830         if (err == 0)
 831                 *status = cmd.resp[0];
 832         return err;
 833 }
 834
 835 static int card_busy_detect(struct mmc_card *card, unsigned int timeout_ms,
 836                 bool hw_busy_detect, struct request *req, int *gen_err)
 837 {
 838         unsigned long timeout = jiffies + msecs_to_jiffies(timeout_ms);
 839         int err = 0;
 840         u32 status;
 841
 842         do {
 843                 err = get_card_status(card, &status, 5);
 844                 if (err) {
 845                         pr_err("%s: error %d requesting status\n",
 846                                req->rq_disk->disk_name, err);
 847                         return err;
 848                 }
 849
 850                 if (status & R1_ERROR) {
 851                         pr_err("%s: %s: error sending status cmd, status %#x\n",
 852                                 req->rq_disk->disk_name, __func__, status);
 853                         *gen_err = 1;
 854                 }
 855
 856                 /* We may rely on the host hw to handle busy detection.*/
 857                 if ((card->host->caps & MMC_CAP_WAIT_WHILE_BUSY) &&
 858                         hw_busy_detect)
 859                         break;
 860
 861                 /*
 862                  * Timeout if the device never becomes ready for data and never
 863                  * leaves the program state.
 864                  */
 865                 if (time_after(jiffies, timeout)) {
 866                         pr_err("%s: Card stuck in programming state! %s %s\n",
 867                                 mmc_hostname(card->host),
 868                                 req->rq_disk->disk_name, __func__);
 869                         return -ETIMEDOUT;
 870                 }
 871
 872                 /*
 873                  * Some cards mishandle the status bits,
 874                  * so make sure to check both the busy
 875                  * indication and the card state.
 876                  */
 877         } while (!(status & R1_READY_FOR_DATA) ||
 878                  (R1_CURRENT_STATE(status) == R1_STATE_PRG));
 879
 880         return err;
 881 }
 882
 883 static int send_stop(struct mmc_card *card, unsigned int timeout_ms,
 884                 struct request *req, int *gen_err, u32 *stop_status)
 885 {
 886         struct mmc_host *host = card->host;
 887         struct mmc_command cmd = {0};
 888         int err;
 889         bool use_r1b_resp = rq_data_dir(req) == WRITE;
 890
 891         /*
 892          * Normally we use R1B responses for WRITE, but in cases where the host
 893          * has specified a max_busy_timeout we need to validate it. A failure
 894          * means we need to prevent the host from doing hw busy detection, which
 895          * is done by converting to a R1 response instead.
 896          */
 897         if (host->max_busy_timeout && (timeout_ms > host->max_busy_timeout))
 898                 use_r1b_resp = false;
 899
 900         cmd.opcode = MMC_STOP_TRANSMISSION;
 901         if (use_r1b_resp) {
 902                 cmd.flags = MMC_RSP_SPI_R1B | MMC_RSP_R1B | MMC_CMD_AC;
 903                 cmd.busy_timeout = timeout_ms;
 904         } else {
 905                 cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC;
 906         }
 907
 908         err = mmc_wait_for_cmd(host, &cmd, 5);
 909         if (err)
 910                 return err;
 911
 912         *stop_status = cmd.resp[0];
 913
 914         /* No need to check card status in case of READ. */
 915         if (rq_data_dir(req) == READ)
 916                 return 0;
 917
 918         if (!mmc_host_is_spi(host) &&
 919                 (*stop_status & R1_ERROR)) {
 920                 pr_err("%s: %s: general error sending stop command, resp %#x\n",
 921                         req->rq_disk->disk_name, __func__, *stop_status);
 922                 *gen_err = 1;
 923         }
 924
 925         return card_busy_detect(card, timeout_ms, use_r1b_resp, req, gen_err);
 926 }
 927
 928 #define ERR_NOMEDIUM    3
 929 #define ERR_RETRY       2
 930 #define ERR_ABORT       1
 931 #define ERR_CONTINUE    0
 932
 933 static int mmc_blk_cmd_error(struct request *req, const char *name, int error,
 934         bool status_valid, u32 status)
 935 {
 936         switch (error) {
 937         case -EILSEQ:
 938                 /* response crc error, retry the r/w cmd */
 939                 pr_err("%s: %s sending %s command, card status %#x\n",
 940                         req->rq_disk->disk_name, "response CRC error",
 941                         name, status);
 942                 return ERR_RETRY;
 943
 944         case -ETIMEDOUT:
 945                 pr_err("%s: %s sending %s command, card status %#x\n",
 946                         req->rq_disk->disk_name, "timed out", name, status);
 947
 948                 /* If the status cmd initially failed, retry the r/w cmd */
 949                 if (!status_valid) {
 950                         pr_err("%s: status not valid, retrying timeout\n", req->rq_disk->disk_name);
 951                         return ERR_RETRY;
 952                 }
 953                 /*
 954                  * If it was a r/w cmd crc error, or illegal command
 955                  * (eg, issued in wrong state) then retry - we should
 956                  * have corrected the state problem above.
 957                  */
 958                 if (status & (R1_COM_CRC_ERROR | R1_ILLEGAL_COMMAND)) {
 959                         pr_err("%s: command error, retrying timeout\n", req->rq_disk->disk_name);
 960                         return ERR_RETRY;
 961                 }
 962
 963                 /* Otherwise abort the command */
 964                 pr_err("%s: not retrying timeout\n", req->rq_disk->disk_name);
 965                 return ERR_ABORT;
 966
 967         default:
 968                 /* We don't understand the error code the driver gave us */
 969                 pr_err("%s: unknown error %d sending read/write command, card status %#x\n",
 970                        req->rq_disk->disk_name, error, status);
 971                 return ERR_ABORT;
 972         }
 973 }
 974
 975 /*
 976  * Initial r/w and stop cmd error recovery.
 977  * We don't know whether the card received the r/w cmd or not, so try to
 978  * restore things back to a sane state.  Essentially, we do this as follows:
 979  * - Obtain card status.  If the first attempt to obtain card status fails,
 980  *   the status word will reflect the failed status cmd, not the failed
 981  *   r/w cmd.  If we fail to obtain card status, it suggests we can no
 982  *   longer communicate with the card.
 983  * - Check the card state.  If the card received the cmd but there was a
 984  *   transient problem with the response, it might still be in a data transfer
 985  *   mode.  Try to send it a stop command.  If this fails, we can't recover.
 986  * - If the r/w cmd failed due to a response CRC error, it was probably
 987  *   transient, so retry the cmd.
 988  * - If the r/w cmd timed out, but we didn't get the r/w cmd status, retry.
 989  * - If the r/w cmd timed out, and the r/w cmd failed due to CRC error or
 990  *   illegal cmd, retry.
 991  * Otherwise we don't understand what happened, so abort.
 992  */
 993 static int mmc_blk_cmd_recovery(struct mmc_card *card, struct request *req,
 994         struct mmc_blk_request *brq, int *ecc_err, int *gen_err)
 995 {
 996         bool prev_cmd_status_valid = true;
 997         u32 status, stop_status = 0;
 998         int err, retry;
 999
1000         if (mmc_card_removed(card))
1001                 return ERR_NOMEDIUM;
1002
1003         /*
1004          * Try to get card status which indicates both the card state
1005          * and why there was no response.  If the first attempt fails,
1006          * we can't be sure the returned status is for the r/w command.
1007          */
1008         for (retry = 2; retry >= 0; retry--) {
1009                 err = get_card_status(card, &status, 0);
1010                 if (!err)
1011                         break;
1012
1013                 /* Re-tune if needed */
1014                 mmc_retune_recheck(card->host);
1015
1016                 prev_cmd_status_valid = false;
1017                 pr_err("%s: error %d sending status command, %sing\n",
1018                        req->rq_disk->disk_name, err, retry ? "retry" : "abort");
1019         }
1020
1021         /* We couldn't get a response from the card.  Give up. */
1022         if (err) {
1023                 /* Check if the card is removed */
1024                 if (mmc_detect_card_removed(card->host))
1025                         return ERR_NOMEDIUM;
1026                 return ERR_ABORT;
1027         }
1028
1029         /* Flag ECC errors */
1030         if ((status & R1_CARD_ECC_FAILED) ||
1031             (brq->stop.resp[0] & R1_CARD_ECC_FAILED) ||
1032             (brq->cmd.resp[0] & R1_CARD_ECC_FAILED))
1033                 *ecc_err = 1;
1034
1035         /* Flag General errors */
1036         if (!mmc_host_is_spi(card->host) && rq_data_dir(req) != READ)
1037                 if ((status & R1_ERROR) ||
1038                         (brq->stop.resp[0] & R1_ERROR)) {
1039                         pr_err("%s: %s: general error sending stop or status command, stop cmd response %#x, card status %#x\n",
1040                                req->rq_disk->disk_name, __func__,
1041                                brq->stop.resp[0], status);
1042                         *gen_err = 1;
1043                 }
1044
1045         /*
1046          * Check the current card state.  If it is in some data transfer
1047          * mode, tell it to stop (and hopefully transition back to TRAN.)
1048          */
1049         if (R1_CURRENT_STATE(status) == R1_STATE_DATA ||
1050             R1_CURRENT_STATE(status) == R1_STATE_RCV) {
1051                 err = send_stop(card,
1052                         DIV_ROUND_UP(brq->data.timeout_ns, 1000000),
1053                         req, gen_err, &stop_status);
1054                 if (err) {
1055                         pr_err("%s: error %d sending stop command\n",
1056                                req->rq_disk->disk_name, err);
1057                         /*
1058                          * If the stop cmd also timed out, the card is probably
1059                          * not present, so abort. Other errors are bad news too.
1060                          */
1061                         return ERR_ABORT;
1062                 }
1063
1064                 if (stop_status & R1_CARD_ECC_FAILED)
1065                         *ecc_err = 1;
1066         }
1067
1068         /* Check for set block count errors */
1069         if (brq->sbc.error)
1070                 return mmc_blk_cmd_error(req, "SET_BLOCK_COUNT", brq->sbc.error,
1071                                 prev_cmd_status_valid, status);
1072
1073         /* Check for r/w command errors */
1074         if (brq->cmd.error)
1075                 return mmc_blk_cmd_error(req, "r/w cmd", brq->cmd.error,
1076                                 prev_cmd_status_valid, status);
1077
1078         /* Data errors */
1079         if (!brq->stop.error)
1080                 return ERR_CONTINUE;
1081
1082         /* Now for stop errors.  These aren't fatal to the transfer. */
1083         pr_info("%s: error %d sending stop command, original cmd response %#x, card status %#x\n",
1084                req->rq_disk->disk_name, brq->stop.error,
1085                brq->cmd.resp[0], status);
1086
1087         /*
1088          * Subsitute in our own stop status as this will give the error
1089          * state which happened during the execution of the r/w command.
1090          */
1091         if (stop_status) {
1092                 brq->stop.resp[0] = stop_status;
1093                 brq->stop.error = 0;
1094         }
1095         return ERR_CONTINUE;
1096 }
1097
1098 static int mmc_blk_reset(struct mmc_blk_data *md, struct mmc_host *host,
1099                          int type)
1100 {
1101         int err;
1102
1103         if (md->reset_done & type)
1104                 return -EEXIST;
1105
1106         md->reset_done |= type;
1107         err = mmc_hw_reset(host);
1108         /* Ensure we switch back to the correct partition */
1109         if (err != -EOPNOTSUPP) {
1110                 struct mmc_blk_data *main_md =
1111                         dev_get_drvdata(&host->card->dev);
1112                 int part_err;
1113
1114                 main_md->part_curr = main_md->part_type;
1115                 part_err = mmc_blk_part_switch(host->card, md);
1116                 if (part_err) {
1117                         /*
1118                          * We have failed to get back into the correct
1119                          * partition, so we need to abort the whole request.
1120                          */
1121                         return -ENODEV;
1122                 }
1123         }
1124         return err;
1125 }
1126
1127 static inline void mmc_blk_reset_success(struct mmc_blk_data *md, int type)
1128 {
1129         md->reset_done &= ~type;
1130 }
1131
1132 int mmc_access_rpmb(struct mmc_queue *mq)
1133 {
1134         struct mmc_blk_data *md = mq->data;
1135         /*
1136          * If this is a RPMB partition access, return ture
1137          */
1138         if (md && md->part_type == EXT_CSD_PART_CONFIG_ACC_RPMB)
1139                 return true;
1140
1141         return false;
1142 }
1143
1144 static int mmc_blk_issue_discard_rq(struct mmc_queue *mq, struct request *req)
1145 {
1146         struct mmc_blk_data *md = mq->data;
1147         struct mmc_card *card = md->queue.card;
1148         unsigned int from, nr, arg;
1149         int err = 0, type = MMC_BLK_DISCARD;
1150
1151         if (!mmc_can_erase(card)) {
1152                 err = -EOPNOTSUPP;
1153                 goto out;
1154         }
1155
1156         from = blk_rq_pos(req);
1157         nr = blk_rq_sectors(req);
1158
1159         if (mmc_can_discard(card))
1160                 arg = MMC_DISCARD_ARG;
1161         else if (mmc_can_trim(card))
1162                 arg = MMC_TRIM_ARG;
1163         else
1164                 arg = MMC_ERASE_ARG;
1165 retry:
1166         if (card->quirks & MMC_QUIRK_INAND_CMD38) {
1167                 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1168                                  INAND_CMD38_ARG_EXT_CSD,
1169                                  arg == MMC_TRIM_ARG ?
1170                                  INAND_CMD38_ARG_TRIM :
1171                                  INAND_CMD38_ARG_ERASE,
1172                                  0);
1173                 if (err)
1174                         goto out;
1175         }
1176         err = mmc_erase(card, from, nr, arg);
1177 out:
1178         if (err == -EIO && !mmc_blk_reset(md, card->host, type))
1179                 goto retry;
1180         if (!err)
1181                 mmc_blk_reset_success(md, type);
1182         blk_end_request(req, err, blk_rq_bytes(req));
1183
1184         return err ? 0 : 1;
1185 }
1186
1187 static int mmc_blk_issue_secdiscard_rq(struct mmc_queue *mq,
1188                                        struct request *req)
1189 {
1190         struct mmc_blk_data *md = mq->data;
1191         struct mmc_card *card = md->queue.card;
1192         unsigned int from, nr, arg;
1193         int err = 0, type = MMC_BLK_SECDISCARD;
1194
1195         if (!(mmc_can_secure_erase_trim(card))) {
1196                 err = -EOPNOTSUPP;
1197                 goto out;
1198         }
1199
1200         from = blk_rq_pos(req);
1201         nr = blk_rq_sectors(req);
1202
1203         if (mmc_can_trim(card) && !mmc_erase_group_aligned(card, from, nr))
1204                 arg = MMC_SECURE_TRIM1_ARG;
1205         else
1206                 arg = MMC_SECURE_ERASE_ARG;
1207
1208 retry:
1209         if (card->quirks & MMC_QUIRK_INAND_CMD38) {
1210                 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1211                                  INAND_CMD38_ARG_EXT_CSD,
1212                                  arg == MMC_SECURE_TRIM1_ARG ?
1213                                  INAND_CMD38_ARG_SECTRIM1 :
1214                                  INAND_CMD38_ARG_SECERASE,
1215                                  0);
1216                 if (err)
1217                         goto out_retry;
1218         }
1219
1220         err = mmc_erase(card, from, nr, arg);
1221         if (err == -EIO)
1222                 goto out_retry;
1223         if (err)
1224                 goto out;
1225
1226         if (arg == MMC_SECURE_TRIM1_ARG) {
1227                 if (card->quirks & MMC_QUIRK_INAND_CMD38) {
1228                         err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1229                                          INAND_CMD38_ARG_EXT_CSD,
1230                                          INAND_CMD38_ARG_SECTRIM2,
1231                                          0);
1232                         if (err)
1233                                 goto out_retry;
1234                 }
1235
1236                 err = mmc_erase(card, from, nr, MMC_SECURE_TRIM2_ARG);
1237                 if (err == -EIO)
1238                         goto out_retry;
1239                 if (err)
1240                         goto out;
1241         }
1242
1243 out_retry:
1244         if (err && !mmc_blk_reset(md, card->host, type))
1245                 goto retry;
1246         if (!err)
1247                 mmc_blk_reset_success(md, type);
1248 out:
1249         blk_end_request(req, err, blk_rq_bytes(req));
1250
1251         return err ? 0 : 1;
1252 }
1253
1254 static int mmc_blk_issue_flush(struct mmc_queue *mq, struct request *req)
1255 {
1256         struct mmc_blk_data *md = mq->data;
1257         struct mmc_card *card = md->queue.card;
1258         int ret = 0;
1259
1260         ret = mmc_flush_cache(card);
1261         if (ret)
1262                 ret = -EIO;
1263
1264         blk_end_request_all(req, ret);
1265
1266         return ret ? 0 : 1;
1267 }
1268
1269 /*
1270  * Reformat current write as a reliable write, supporting
1271  * both legacy and the enhanced reliable write MMC cards.
1272  * In each transfer we'll handle only as much as a single
1273  * reliable write can handle, thus finish the request in
1274  * partial completions.
1275  */
1276 static inline void mmc_apply_rel_rw(struct mmc_blk_request *brq,
1277                                     struct mmc_card *card,
1278                                     struct request *req)
1279 {
1280         if (!(card->ext_csd.rel_param & EXT_CSD_WR_REL_PARAM_EN)) {
1281                 /* Legacy mode imposes restrictions on transfers. */
1282                 if (!IS_ALIGNED(brq->cmd.arg, card->ext_csd.rel_sectors))
1283                         brq->data.blocks = 1;
1284
1285                 if (brq->data.blocks > card->ext_csd.rel_sectors)
1286                         brq->data.blocks = card->ext_csd.rel_sectors;
1287                 else if (brq->data.blocks < card->ext_csd.rel_sectors)
1288                         brq->data.blocks = 1;
1289         }
1290 }
1291
1292 #define CMD_ERRORS                                                      \
1293         (R1_OUT_OF_RANGE |      /* Command argument out of range */     \
1294          R1_ADDRESS_ERROR |     /* Misaligned address */                \
1295          R1_BLOCK_LEN_ERROR |   /* Transferred block length incorrect */\
1296          R1_WP_VIOLATION |      /* Tried to write to protected block */ \
1297          R1_CC_ERROR |          /* Card controller error */             \
1298          R1_ERROR)              /* General/unknown error */
1299
1300 static int mmc_blk_err_check(struct mmc_card *card,
1301                              struct mmc_async_req *areq)
1302 {
1303         struct mmc_queue_req *mq_mrq = container_of(areq, struct mmc_queue_req,
1304                                                     mmc_active);
1305         struct mmc_blk_request *brq = &mq_mrq->brq;
1306         struct request *req = mq_mrq->req;
1307         int need_retune = card->host->need_retune;
1308         int ecc_err = 0, gen_err = 0;
1309
1310         /*
1311          * sbc.error indicates a problem with the set block count
1312          * command.  No data will have been transferred.
1313          *
1314          * cmd.error indicates a problem with the r/w command.  No
1315          * data will have been transferred.
1316          *
1317          * stop.error indicates a problem with the stop command.  Data
1318          * may have been transferred, or may still be transferring.
1319          */
1320         if (brq->sbc.error || brq->cmd.error || brq->stop.error ||
1321             brq->data.error) {
1322                 switch (mmc_blk_cmd_recovery(card, req, brq, &ecc_err, &gen_err)) {
1323                 case ERR_RETRY:
1324                         return MMC_BLK_RETRY;
1325                 case ERR_ABORT:
1326                         return MMC_BLK_ABORT;
1327                 case ERR_NOMEDIUM:
1328                         return MMC_BLK_NOMEDIUM;
1329                 case ERR_CONTINUE:
1330                         break;
1331                 }
1332         }
1333
1334         /*
1335          * Check for errors relating to the execution of the
1336          * initial command - such as address errors.  No data
1337          * has been transferred.
1338          */
1339         if (brq->cmd.resp[0] & CMD_ERRORS) {
1340                 pr_err("%s: r/w command failed, status = %#x\n",
1341                        req->rq_disk->disk_name, brq->cmd.resp[0]);
1342                 return MMC_BLK_ABORT;
1343         }
1344
1345         /*
1346          * Everything else is either success, or a data error of some
1347          * kind.  If it was a write, we may have transitioned to
1348          * program mode, which we have to wait for it to complete.
1349          */
1350         if (!mmc_host_is_spi(card->host) && rq_data_dir(req) != READ) {
1351                 int err;
1352
1353                 /* Check stop command response */
1354                 if (brq->stop.resp[0] & R1_ERROR) {
1355                         pr_err("%s: %s: general error sending stop command, stop cmd response %#x\n",
1356                                req->rq_disk->disk_name, __func__,
1357                                brq->stop.resp[0]);
1358                         gen_err = 1;
1359                 }
1360
1361                 err = card_busy_detect(card, MMC_BLK_TIMEOUT_MS, false, req,
1362                                         &gen_err);
1363                 if (err)
1364                         return MMC_BLK_CMD_ERR;
1365         }
1366
1367         /* if general error occurs, retry the write operation. */
1368         if (gen_err) {
1369                 pr_warn("%s: retrying write for general error\n",
1370                                 req->rq_disk->disk_name);
1371                 return MMC_BLK_RETRY;
1372         }
1373
1374         if (brq->data.error) {
1375                 if (need_retune && !brq->retune_retry_done) {
1376                         pr_info("%s: retrying because a re-tune was needed\n",
1377                                 req->rq_disk->disk_name);
1378                         brq->retune_retry_done = 1;
1379                         return MMC_BLK_RETRY;
1380                 }
1381                 pr_err("%s: error %d transferring data, sector %u, nr %u, cmd response %#x, card status %#x\n",
1382                        req->rq_disk->disk_name, brq->data.error,
1383                        (unsigned)blk_rq_pos(req),
1384                        (unsigned)blk_rq_sectors(req),
1385                        brq->cmd.resp[0], brq->stop.resp[0]);
1386
1387                 if (rq_data_dir(req) == READ) {
1388                         if (ecc_err)
1389                                 return MMC_BLK_ECC_ERR;
1390                         return MMC_BLK_DATA_ERR;
1391                 } else {
1392                         return MMC_BLK_CMD_ERR;
1393                 }
1394         }
1395
1396         if (!brq->data.bytes_xfered)
1397                 return MMC_BLK_RETRY;
1398
1399         if (mmc_packed_cmd(mq_mrq->cmd_type)) {
1400                 if (unlikely(brq->data.blocks << 9 != brq->data.bytes_xfered))
1401                         return MMC_BLK_PARTIAL;
1402                 else
1403                         return MMC_BLK_SUCCESS;
1404         }
1405
1406         if (blk_rq_bytes(req) != brq->data.bytes_xfered)
1407                 return MMC_BLK_PARTIAL;
1408
1409         return MMC_BLK_SUCCESS;
1410 }
1411
1412 static int mmc_blk_packed_err_check(struct mmc_card *card,
1413                                     struct mmc_async_req *areq)
1414 {
1415         struct mmc_queue_req *mq_rq = container_of(areq, struct mmc_queue_req,
1416                         mmc_active);
1417         struct request *req = mq_rq->req;
1418         struct mmc_packed *packed = mq_rq->packed;
1419         int err, check, status;
1420         u8 *ext_csd;
1421
1422         BUG_ON(!packed);
1423
1424         packed->retries--;
1425         check = mmc_blk_err_check(card, areq);
1426         err = get_card_status(card, &status, 0);
1427         if (err) {
1428                 pr_err("%s: error %d sending status command\n",
1429                        req->rq_disk->disk_name, err);
1430                 return MMC_BLK_ABORT;
1431         }
1432
1433         if (status & R1_EXCEPTION_EVENT) {
1434                 err = mmc_get_ext_csd(card, &ext_csd);
1435                 if (err) {
1436                         pr_err("%s: error %d sending ext_csd\n",
1437                                req->rq_disk->disk_name, err);
1438                         return MMC_BLK_ABORT;
1439                 }
1440
1441                 if ((ext_csd[EXT_CSD_EXP_EVENTS_STATUS] &
1442                      EXT_CSD_PACKED_FAILURE) &&
1443                     (ext_csd[EXT_CSD_PACKED_CMD_STATUS] &
1444                      EXT_CSD_PACKED_GENERIC_ERROR)) {
1445                         if (ext_csd[EXT_CSD_PACKED_CMD_STATUS] &
1446                             EXT_CSD_PACKED_INDEXED_ERROR) {
1447                                 packed->idx_failure =
1448                                   ext_csd[EXT_CSD_PACKED_FAILURE_INDEX] - 1;
1449                                 check = MMC_BLK_PARTIAL;
1450                         }
1451                         pr_err("%s: packed cmd failed, nr %u, sectors %u, "
1452                                "failure index: %d\n",
1453                                req->rq_disk->disk_name, packed->nr_entries,
1454                                packed->blocks, packed->idx_failure);
1455                 }
1456                 kfree(ext_csd);
1457         }
1458
1459         return check;
1460 }
1461
1462 static void mmc_blk_rw_rq_prep(struct mmc_queue_req *mqrq,
1463                                struct mmc_card *card,
1464                                int disable_multi,
1465                                struct mmc_queue *mq)
1466 {
1467         u32 readcmd, writecmd;
1468         struct mmc_blk_request *brq = &mqrq->brq;
1469         struct request *req = mqrq->req;
1470         struct mmc_blk_data *md = mq->data;
1471         bool do_data_tag;
1472
1473         /*
1474          * Reliable writes are used to implement Forced Unit Access and
1475          * are supported only on MMCs.
1476          */
1477         bool do_rel_wr = (req->cmd_flags & REQ_FUA) &&
1478                 (rq_data_dir(req) == WRITE) &&
1479                 (md->flags & MMC_BLK_REL_WR);
1480
1481         memset(brq, 0, sizeof(struct mmc_blk_request));
1482         brq->mrq.cmd = &brq->cmd;
1483         brq->mrq.data = &brq->data;
1484
1485         brq->cmd.arg = blk_rq_pos(req);
1486         if (!mmc_card_blockaddr(card))
1487                 brq->cmd.arg <<= 9;
1488         brq->cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC;
1489         brq->data.blksz = 512;
1490         brq->stop.opcode = MMC_STOP_TRANSMISSION;
1491         brq->stop.arg = 0;
1492         brq->data.blocks = blk_rq_sectors(req);
1493
1494         /*
1495          * The block layer doesn't support all sector count
1496          * restrictions, so we need to be prepared for too big
1497          * requests.
1498          */
1499         if (brq->data.blocks > card->host->max_blk_count)
1500                 brq->data.blocks = card->host->max_blk_count;
1501
1502         if (brq->data.blocks > 1) {
1503                 /*
1504                  * After a read error, we redo the request one sector
1505                  * at a time in order to accurately determine which
1506                  * sectors can be read successfully.
1507                  */
1508                 if (disable_multi)
1509                         brq->data.blocks = 1;
1510
1511                 /*
1512                  * Some controllers have HW issues while operating
1513                  * in multiple I/O mode
1514                  */
1515                 if (card->host->ops->multi_io_quirk)
1516                         brq->data.blocks = card->host->ops->multi_io_quirk(card,
1517                                                 (rq_data_dir(req) == READ) ?
1518                                                 MMC_DATA_READ : MMC_DATA_WRITE,
1519                                                 brq->data.blocks);
1520         }
1521
1522         if (brq->data.blocks > 1 || do_rel_wr) {
1523                 /* SPI multiblock writes terminate using a special
1524                  * token, not a STOP_TRANSMISSION request.
1525                  */
1526                 if (!mmc_host_is_spi(card->host) ||
1527                     rq_data_dir(req) == READ)
1528                         brq->mrq.stop = &brq->stop;
1529                 readcmd = MMC_READ_MULTIPLE_BLOCK;
1530                 writecmd = MMC_WRITE_MULTIPLE_BLOCK;
1531         } else {
1532                 brq->mrq.stop = NULL;
1533                 readcmd = MMC_READ_SINGLE_BLOCK;
1534                 writecmd = MMC_WRITE_BLOCK;
1535         }
1536         if (rq_data_dir(req) == READ) {
1537                 brq->cmd.opcode = readcmd;
1538                 brq->data.flags |= MMC_DATA_READ;
1539                 if (brq->mrq.stop)
1540                         brq->stop.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 |
1541                                         MMC_CMD_AC;
1542         } else {
1543                 brq->cmd.opcode = writecmd;
1544                 brq->data.flags |= MMC_DATA_WRITE;
1545                 if (brq->mrq.stop)
1546                         brq->stop.flags = MMC_RSP_SPI_R1B | MMC_RSP_R1B |
1547                                         MMC_CMD_AC;
1548         }
1549
1550         if (do_rel_wr)
1551                 mmc_apply_rel_rw(brq, card, req);
1552
1553         /*
1554          * Data tag is used only during writing meta data to speed
1555          * up write and any subsequent read of this meta data
1556          */
1557         do_data_tag = (card->ext_csd.data_tag_unit_size) &&
1558                 (req->cmd_flags & REQ_META) &&
1559                 (rq_data_dir(req) == WRITE) &&
1560                 ((brq->data.blocks * brq->data.blksz) >=
1561                  card->ext_csd.data_tag_unit_size);
1562
1563         /*
1564          * Pre-defined multi-block transfers are preferable to
1565          * open ended-ones (and necessary for reliable writes).
1566          * However, it is not sufficient to just send CMD23,
1567          * and avoid the final CMD12, as on an error condition
1568          * CMD12 (stop) needs to be sent anyway. This, coupled
1569          * with Auto-CMD23 enhancements provided by some
1570          * hosts, means that the complexity of dealing
1571          * with this is best left to the host. If CMD23 is
1572          * supported by card and host, we'll fill sbc in and let
1573          * the host deal with handling it correctly. This means
1574          * that for hosts that don't expose MMC_CAP_CMD23, no
1575          * change of behavior will be observed.
1576          *
1577          * N.B: Some MMC cards experience perf degradation.
1578          * We'll avoid using CMD23-bounded multiblock writes for
1579          * these, while retaining features like reliable writes.
1580          */
1581         if ((md->flags & MMC_BLK_CMD23) && mmc_op_multi(brq->cmd.opcode) &&
1582             (do_rel_wr || !(card->quirks & MMC_QUIRK_BLK_NO_CMD23) ||
1583              do_data_tag)) {
1584                 brq->sbc.opcode = MMC_SET_BLOCK_COUNT;
1585                 brq->sbc.arg = brq->data.blocks |
1586                         (do_rel_wr ? (1 << 31) : 0) |
1587                         (do_data_tag ? (1 << 29) : 0);
1588                 brq->sbc.flags = MMC_RSP_R1 | MMC_CMD_AC;
1589                 brq->mrq.sbc = &brq->sbc;
1590         }
1591
1592         mmc_set_data_timeout(&brq->data, card);
1593
1594         brq->data.sg = mqrq->sg;
1595         brq->data.sg_len = mmc_queue_map_sg(mq, mqrq);
1596
1597         /*
1598          * Adjust the sg list so it is the same size as the
1599          * request.
1600          */
1601         if (brq->data.blocks != blk_rq_sectors(req)) {
1602                 int i, data_size = brq->data.blocks << 9;
1603                 struct scatterlist *sg;
1604
1605                 for_each_sg(brq->data.sg, sg, brq->data.sg_len, i) {
1606                         data_size -= sg->length;
1607                         if (data_size <= 0) {
1608                                 sg->length += data_size;
1609                                 i++;
1610                                 break;
1611                         }
1612                 }
1613                 brq->data.sg_len = i;
1614         }
1615
1616         mqrq->mmc_active.mrq = &brq->mrq;
1617         mqrq->mmc_active.err_check = mmc_blk_err_check;
1618
1619         mmc_queue_bounce_pre(mqrq);
1620 }
1621
1622 static inline u8 mmc_calc_packed_hdr_segs(struct request_queue *q,
1623                                           struct mmc_card *card)
1624 {
1625         unsigned int hdr_sz = mmc_large_sector(card) ? 4096 : 512;
1626         unsigned int max_seg_sz = queue_max_segment_size(q);
1627         unsigned int len, nr_segs = 0;
1628
1629         do {
1630                 len = min(hdr_sz, max_seg_sz);
1631                 hdr_sz -= len;
1632                 nr_segs++;
1633         } while (hdr_sz);
1634
1635         return nr_segs;
1636 }
1637
1638 static u8 mmc_blk_prep_packed_list(struct mmc_queue *mq, struct request *req)
1639 {
1640         struct request_queue *q = mq->queue;
1641         struct mmc_card *card = mq->card;
1642         struct request *cur = req, *next = NULL;
1643         struct mmc_blk_data *md = mq->data;
1644         struct mmc_queue_req *mqrq = mq->mqrq_cur;
1645         bool en_rel_wr = card->ext_csd.rel_param & EXT_CSD_WR_REL_PARAM_EN;
1646         unsigned int req_sectors = 0, phys_segments = 0;
1647         unsigned int max_blk_count, max_phys_segs;
1648         bool put_back = true;
1649         u8 max_packed_rw = 0;
1650         u8 reqs = 0;
1651
1652         if (!(md->flags & MMC_BLK_PACKED_CMD))
1653                 goto no_packed;
1654
1655         if ((rq_data_dir(cur) == WRITE) &&
1656             mmc_host_packed_wr(card->host))
1657                 max_packed_rw = card->ext_csd.max_packed_writes;
1658
1659         if (max_packed_rw == 0)
1660                 goto no_packed;
1661
1662         if (mmc_req_rel_wr(cur) &&
1663             (md->flags & MMC_BLK_REL_WR) && !en_rel_wr)
1664                 goto no_packed;
1665
1666         if (mmc_large_sector(card) &&
1667             !IS_ALIGNED(blk_rq_sectors(cur), 8))
1668                 goto no_packed;
1669
1670         mmc_blk_clear_packed(mqrq);
1671
1672         max_blk_count = min(card->host->max_blk_count,
1673                             card->host->max_req_size >> 9);
1674         if (unlikely(max_blk_count > 0xffff))
1675                 max_blk_count = 0xffff;
1676
1677         max_phys_segs = queue_max_segments(q);
1678         req_sectors += blk_rq_sectors(cur);
1679         phys_segments += cur->nr_phys_segments;
1680
1681         if (rq_data_dir(cur) == WRITE) {
1682                 req_sectors += mmc_large_sector(card) ? 8 : 1;
1683                 phys_segments += mmc_calc_packed_hdr_segs(q, card);
1684         }
1685
1686         do {
1687                 if (reqs >= max_packed_rw - 1) {
1688                         put_back = false;
1689                         break;
1690                 }
1691
1692                 spin_lock_irq(q->queue_lock);
1693                 next = blk_fetch_request(q);
1694                 spin_unlock_irq(q->queue_lock);
1695                 if (!next) {
1696                         put_back = false;
1697                         break;
1698                 }
1699
1700                 if (mmc_large_sector(card) &&
1701                     !IS_ALIGNED(blk_rq_sectors(next), 8))
1702                         break;
1703
1704                 if (next->cmd_flags & REQ_DISCARD ||
1705                     next->cmd_flags & REQ_FLUSH)
1706                         break;
1707
1708                 if (rq_data_dir(cur) != rq_data_dir(next))
1709                         break;
1710
1711                 if (mmc_req_rel_wr(next) &&
1712                     (md->flags & MMC_BLK_REL_WR) && !en_rel_wr)
1713                         break;
1714
1715                 req_sectors += blk_rq_sectors(next);
1716                 if (req_sectors > max_blk_count)
1717                         break;
1718
1719                 phys_segments +=  next->nr_phys_segments;
1720                 if (phys_segments > max_phys_segs)
1721                         break;
1722
1723                 list_add_tail(&next->queuelist, &mqrq->packed->list);
1724                 cur = next;
1725                 reqs++;
1726         } while (1);
1727
1728         if (put_back) {
1729                 spin_lock_irq(q->queue_lock);
1730                 blk_requeue_request(q, next);
1731                 spin_unlock_irq(q->queue_lock);
1732         }
1733
1734         if (reqs > 0) {
1735                 list_add(&req->queuelist, &mqrq->packed->list);
1736                 mqrq->packed->nr_entries = ++reqs;
1737                 mqrq->packed->retries = reqs;
1738                 return reqs;
1739         }
1740
1741 no_packed:
1742         mqrq->cmd_type = MMC_PACKED_NONE;
1743         return 0;
1744 }
1745
1746 static void mmc_blk_packed_hdr_wrq_prep(struct mmc_queue_req *mqrq,
1747                                         struct mmc_card *card,
1748                                         struct mmc_queue *mq)
1749 {
1750         struct mmc_blk_request *brq = &mqrq->brq;
1751         struct request *req = mqrq->req;
1752         struct request *prq;
1753         struct mmc_blk_data *md = mq->data;
1754         struct mmc_packed *packed = mqrq->packed;
1755         bool do_rel_wr, do_data_tag;
1756         u32 *packed_cmd_hdr;
1757         u8 hdr_blocks;
1758         u8 i = 1;
1759
1760         BUG_ON(!packed);
1761
1762         mqrq->cmd_type = MMC_PACKED_WRITE;
1763         packed->blocks = 0;
1764         packed->idx_failure = MMC_PACKED_NR_IDX;
1765
1766         packed_cmd_hdr = packed->cmd_hdr;
1767         memset(packed_cmd_hdr, 0, sizeof(packed->cmd_hdr));
1768         packed_cmd_hdr[0] = (packed->nr_entries << 16) |
1769                 (PACKED_CMD_WR << 8) | PACKED_CMD_VER;
1770         hdr_blocks = mmc_large_sector(card) ? 8 : 1;
1771
1772         /*
1773          * Argument for each entry of packed group
1774          */
1775         list_for_each_entry(prq, &packed->list, queuelist) {
1776                 do_rel_wr = mmc_req_rel_wr(prq) && (md->flags & MMC_BLK_REL_WR);
1777                 do_data_tag = (card->ext_csd.data_tag_unit_size) &&
1778                         (prq->cmd_flags & REQ_META) &&
1779                         (rq_data_dir(prq) == WRITE) &&
1780                         ((brq->data.blocks * brq->data.blksz) >=
1781                          card->ext_csd.data_tag_unit_size);
1782                 /* Argument of CMD23 */
1783                 packed_cmd_hdr[(i * 2)] =
1784                         (do_rel_wr ? MMC_CMD23_ARG_REL_WR : 0) |
1785                         (do_data_tag ? MMC_CMD23_ARG_TAG_REQ : 0) |
1786                         blk_rq_sectors(prq);
1787                 /* Argument of CMD18 or CMD25 */
1788                 packed_cmd_hdr[((i * 2)) + 1] =
1789                         mmc_card_blockaddr(card) ?
1790                         blk_rq_pos(prq) : blk_rq_pos(prq) << 9;
1791                 packed->blocks += blk_rq_sectors(prq);
1792                 i++;
1793         }
1794
1795         memset(brq, 0, sizeof(struct mmc_blk_request));
1796         brq->mrq.cmd = &brq->cmd;
1797         brq->mrq.data = &brq->data;
1798         brq->mrq.sbc = &brq->sbc;
1799         brq->mrq.stop = &brq->stop;
1800
1801         brq->sbc.opcode = MMC_SET_BLOCK_COUNT;
1802         brq->sbc.arg = MMC_CMD23_ARG_PACKED | (packed->blocks + hdr_blocks);
1803         brq->sbc.flags = MMC_RSP_R1 | MMC_CMD_AC;
1804
1805         brq->cmd.opcode = MMC_WRITE_MULTIPLE_BLOCK;
1806         brq->cmd.arg = blk_rq_pos(req);
1807         if (!mmc_card_blockaddr(card))
1808                 brq->cmd.arg <<= 9;
1809         brq->cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC;
1810
1811         brq->data.blksz = 512;
1812         brq->data.blocks = packed->blocks + hdr_blocks;
1813         brq->data.flags |= MMC_DATA_WRITE;
1814
1815         brq->stop.opcode = MMC_STOP_TRANSMISSION;
1816         brq->stop.arg = 0;
1817         brq->stop.flags = MMC_RSP_SPI_R1B | MMC_RSP_R1B | MMC_CMD_AC;
1818
1819         mmc_set_data_timeout(&brq->data, card);
1820
1821         brq->data.sg = mqrq->sg;
1822         brq->data.sg_len = mmc_queue_map_sg(mq, mqrq);
1823
1824         mqrq->mmc_active.mrq = &brq->mrq;
1825         mqrq->mmc_active.err_check = mmc_blk_packed_err_check;
1826
1827         mmc_queue_bounce_pre(mqrq);
1828 }
1829
1830 static int mmc_blk_cmd_err(struct mmc_blk_data *md, struct mmc_card *card,
1831                            struct mmc_blk_request *brq, struct request *req,
1832                            int ret)
1833 {
1834         struct mmc_queue_req *mq_rq;
1835         mq_rq = container_of(brq, struct mmc_queue_req, brq);
1836
1837         /*
1838          * If this is an SD card and we're writing, we can first
1839          * mark the known good sectors as ok.
1840          *
1841          * If the card is not SD, we can still ok written sectors
1842          * as reported by the controller (which might be less than
1843          * the real number of written sectors, but never more).
1844          */
1845         if (mmc_card_sd(card)) {
1846                 u32 blocks;
1847
1848                 blocks = mmc_sd_num_wr_blocks(card);
1849                 if (blocks != (u32)-1) {
1850                         ret = blk_end_request(req, 0, blocks << 9);
1851                 }
1852         } else {
1853                 if (!mmc_packed_cmd(mq_rq->cmd_type))
1854                         ret = blk_end_request(req, 0, brq->data.bytes_xfered);
1855         }
1856         return ret;
1857 }
1858
1859 static int mmc_blk_end_packed_req(struct mmc_queue_req *mq_rq)
1860 {
1861         struct request *prq;
1862         struct mmc_packed *packed = mq_rq->packed;
1863         int idx = packed->idx_failure, i = 0;
1864         int ret = 0;
1865
1866         BUG_ON(!packed);
1867
1868         while (!list_empty(&packed->list)) {
1869                 prq = list_entry_rq(packed->list.next);
1870                 if (idx == i) {
1871                         /* retry from error index */
1872                         packed->nr_entries -= idx;
1873                         mq_rq->req = prq;
1874                         ret = 1;
1875
1876                         if (packed->nr_entries == MMC_PACKED_NR_SINGLE) {
1877                                 list_del_init(&prq->queuelist);
1878                                 mmc_blk_clear_packed(mq_rq);
1879                         }
1880                         return ret;
1881                 }
1882                 list_del_init(&prq->queuelist);
1883                 blk_end_request(prq, 0, blk_rq_bytes(prq));
1884                 i++;
1885         }
1886
1887         mmc_blk_clear_packed(mq_rq);
1888         return ret;
1889 }
1890
1891 static void mmc_blk_abort_packed_req(struct mmc_queue_req *mq_rq)
1892 {
1893         struct request *prq;
1894         struct mmc_packed *packed = mq_rq->packed;
1895
1896         BUG_ON(!packed);
1897
1898         while (!list_empty(&packed->list)) {
1899                 prq = list_entry_rq(packed->list.next);
1900                 list_del_init(&prq->queuelist);
1901                 blk_end_request(prq, -EIO, blk_rq_bytes(prq));
1902         }
1903
1904         mmc_blk_clear_packed(mq_rq);
1905 }
1906
1907 static void mmc_blk_revert_packed_req(struct mmc_queue *mq,
1908                                       struct mmc_queue_req *mq_rq)
1909 {
1910         struct request *prq;
1911         struct request_queue *q = mq->queue;
1912         struct mmc_packed *packed = mq_rq->packed;
1913
1914         BUG_ON(!packed);
1915
1916         while (!list_empty(&packed->list)) {
1917                 prq = list_entry_rq(packed->list.prev);
1918                 if (prq->queuelist.prev != &packed->list) {
1919                         list_del_init(&prq->queuelist);
1920                         spin_lock_irq(q->queue_lock);
1921                         blk_requeue_request(mq->queue, prq);
1922                         spin_unlock_irq(q->queue_lock);
1923                 } else {
1924                         list_del_init(&prq->queuelist);
1925                 }
1926         }
1927
1928         mmc_blk_clear_packed(mq_rq);
1929 }
1930
1931 static int mmc_blk_issue_rw_rq(struct mmc_queue *mq, struct request *rqc)
1932 {
1933         struct mmc_blk_data *md = mq->data;
1934         struct mmc_card *card = md->queue.card;
1935         struct mmc_blk_request *brq = &mq->mqrq_cur->brq;
1936         int ret = 1, disable_multi = 0, retry = 0, type, retune_retry_done = 0;
1937         enum mmc_blk_status status;
1938         struct mmc_queue_req *mq_rq;
1939         struct request *req = rqc;
1940         struct mmc_async_req *areq;
1941         const u8 packed_nr = 2;
1942         u8 reqs = 0;
1943
1944         if (!rqc && !mq->mqrq_prev->req)
1945                 return 0;
1946
1947         if (rqc)
1948                 reqs = mmc_blk_prep_packed_list(mq, rqc);
1949
1950         do {
1951                 if (rqc) {
1952                         /*
1953                          * When 4KB native sector is enabled, only 8 blocks
1954                          * multiple read or write is allowed
1955                          */
1956                         if ((brq->data.blocks & 0x07) &&
1957                             (card->ext_csd.data_sector_size == 4096)) {
1958                                 pr_err("%s: Transfer size is not 4KB sector size aligned\n",
1959                                         req->rq_disk->disk_name);
1960                                 mq_rq = mq->mqrq_cur;
1961                                 goto cmd_abort;
1962                         }
1963
1964                         if (reqs >= packed_nr)
1965                                 mmc_blk_packed_hdr_wrq_prep(mq->mqrq_cur,
1966                                                             card, mq);
1967                         else
1968                                 mmc_blk_rw_rq_prep(mq->mqrq_cur, card, 0, mq);
1969                         areq = &mq->mqrq_cur->mmc_active;
1970                 } else
1971                         areq = NULL;
1972                 areq = mmc_start_req(card->host, areq, (int *) &status);
1973                 if (!areq) {
1974                         if (status == MMC_BLK_NEW_REQUEST)
1975                                 mq->flags |= MMC_QUEUE_NEW_REQUEST;
1976                         return 0;
1977                 }
1978
1979                 mq_rq = container_of(areq, struct mmc_queue_req, mmc_active);
1980                 brq = &mq_rq->brq;
1981                 req = mq_rq->req;
1982                 type = rq_data_dir(req) == READ ? MMC_BLK_READ : MMC_BLK_WRITE;
1983                 mmc_queue_bounce_post(mq_rq);
1984
1985                 switch (status) {
1986                 case MMC_BLK_SUCCESS:
1987                 case MMC_BLK_PARTIAL:
1988                         /*
1989                          * A block was successfully transferred.
1990                          */
1991                         mmc_blk_reset_success(md, type);
1992
1993                         if (mmc_packed_cmd(mq_rq->cmd_type)) {
1994                                 ret = mmc_blk_end_packed_req(mq_rq);
1995                                 break;
1996                         } else {
1997                                 ret = blk_end_request(req, 0,
1998                                                 brq->data.bytes_xfered);
1999                         }
2000
2001                         /*
2002                          * If the blk_end_request function returns non-zero even
2003                          * though all data has been transferred and no errors
2004                          * were returned by the host controller, it's a bug.
2005                          */
2006                         if (status == MMC_BLK_SUCCESS && ret) {
2007                                 pr_err("%s BUG rq_tot %d d_xfer %d\n",
2008                                        __func__, blk_rq_bytes(req),
2009                                        brq->data.bytes_xfered);
2010                                 rqc = NULL;
2011                                 goto cmd_abort;
2012                         }
2013                         break;
2014                 case MMC_BLK_CMD_ERR:
2015                         ret = mmc_blk_cmd_err(md, card, brq, req, ret);
2016                         if (mmc_blk_reset(md, card->host, type))
2017                                 goto cmd_abort;
2018                         if (!ret)
2019                                 goto start_new_req;
2020                         break;
2021                 case MMC_BLK_RETRY:
2022                         retune_retry_done = brq->retune_retry_done;
2023                         if (retry++ < 5)
2024                                 break;
2025                         /* Fall through */
2026                 case MMC_BLK_ABORT:
2027                         if (!mmc_blk_reset(md, card->host, type))
2028                                 break;
2029                         goto cmd_abort;
2030                 case MMC_BLK_DATA_ERR: {
2031                         int err;
2032
2033                         err = mmc_blk_reset(md, card->host, type);
2034                         if (!err)
2035                                 break;
2036                         if (err == -ENODEV ||
2037                                 mmc_packed_cmd(mq_rq->cmd_type))
2038                                 goto cmd_abort;
2039                         /* Fall through */
2040                 }
2041                 case MMC_BLK_ECC_ERR:
2042                         if (brq->data.blocks > 1) {
2043                                 /* Redo read one sector at a time */
2044                                 pr_warn("%s: retrying using single block read\n",
2045                                         req->rq_disk->disk_name);
2046                                 disable_multi = 1;
2047                                 break;
2048                         }
2049                         /*
2050                          * After an error, we redo I/O one sector at a
2051                          * time, so we only reach here after trying to
2052                          * read a single sector.
2053                          */
2054                         ret = blk_end_request(req, -EIO,
2055                                                 brq->data.blksz);
2056                         if (!ret)
2057                                 goto start_new_req;
2058                         break;
2059                 case MMC_BLK_NOMEDIUM:
2060                         goto cmd_abort;
2061                 default:
2062                         pr_err("%s: Unhandled return value (%d)",
2063                                         req->rq_disk->disk_name, status);
2064                         goto cmd_abort;
2065                 }
2066
2067                 if (ret) {
2068                         if (mmc_packed_cmd(mq_rq->cmd_type)) {
2069                                 if (!mq_rq->packed->retries)
2070                                         goto cmd_abort;
2071                                 mmc_blk_packed_hdr_wrq_prep(mq_rq, card, mq);
2072                                 mmc_start_req(card->host,
2073                                               &mq_rq->mmc_active, NULL);
2074                         } else {
2075
2076                                 /*
2077                                  * In case of a incomplete request
2078                                  * prepare it again and resend.
2079                                  */
2080                                 mmc_blk_rw_rq_prep(mq_rq, card,
2081                                                 disable_multi, mq);
2082                                 mmc_start_req(card->host,
2083                                                 &mq_rq->mmc_active, NULL);
2084                         }
2085                         mq_rq->brq.retune_retry_done = retune_retry_done;
2086                 }
2087         } while (ret);
2088
2089         return 1;
2090
2091  cmd_abort:
2092         if (mmc_packed_cmd(mq_rq->cmd_type)) {
2093                 mmc_blk_abort_packed_req(mq_rq);
2094         } else {
2095                 if (mmc_card_removed(card))
2096                         req->cmd_flags |= REQ_QUIET;
2097                 while (ret)
2098                         ret = blk_end_request(req, -EIO,
2099                                         blk_rq_cur_bytes(req));
2100         }
2101
2102  start_new_req:
2103         if (rqc) {
2104                 if (mmc_card_removed(card)) {
2105                         rqc->cmd_flags |= REQ_QUIET;
2106                         blk_end_request_all(rqc, -EIO);
2107                 } else {
2108                         /*
2109                          * If current request is packed, it needs to put back.
2110                          */
2111                         if (mmc_packed_cmd(mq->mqrq_cur->cmd_type))
2112                                 mmc_blk_revert_packed_req(mq, mq->mqrq_cur);
2113
2114                         mmc_blk_rw_rq_prep(mq->mqrq_cur, card, 0, mq);
2115                         mmc_start_req(card->host,
2116                                       &mq->mqrq_cur->mmc_active, NULL);
2117                 }
2118         }
2119
2120         return 0;
2121 }
2122
2123 static int mmc_blk_issue_rq(struct mmc_queue *mq, struct request *req)
2124 {
2125         int ret;
2126         struct mmc_blk_data *md = mq->data;
2127         struct mmc_card *card = md->queue.card;
2128         struct mmc_host *host = card->host;
2129         unsigned long flags;
2130         unsigned int cmd_flags = req ? req->cmd_flags : 0;
2131
2132         if (req && !mq->mqrq_prev->req)
2133                 /* claim host only for the first request */
2134                 mmc_get_card(card);
2135
2136         ret = mmc_blk_part_switch(card, md);
2137         if (ret) {
2138                 if (req) {
2139                         blk_end_request_all(req, -EIO);
2140                 }
2141                 ret = 0;
2142                 goto out;
2143         }
2144
2145         mq->flags &= ~MMC_QUEUE_NEW_REQUEST;
2146         if (cmd_flags & REQ_DISCARD) {
2147                 /* complete ongoing async transfer before issuing discard */
2148                 if (card->host->areq)
2149                         mmc_blk_issue_rw_rq(mq, NULL);
2150                 if (req->cmd_flags & REQ_SECURE)
2151                         ret = mmc_blk_issue_secdiscard_rq(mq, req);
2152                 else
2153                         ret = mmc_blk_issue_discard_rq(mq, req);
2154         } else if (cmd_flags & REQ_FLUSH) {
2155                 /* complete ongoing async transfer before issuing flush */
2156                 if (card->host->areq)
2157                         mmc_blk_issue_rw_rq(mq, NULL);
2158                 ret = mmc_blk_issue_flush(mq, req);
2159         } else {
2160                 if (!req && host->areq) {
2161                         spin_lock_irqsave(&host->context_info.lock, flags);
2162                         host->context_info.is_waiting_last_req = true;
2163                         spin_unlock_irqrestore(&host->context_info.lock, flags);
2164                 }
2165                 ret = mmc_blk_issue_rw_rq(mq, req);
2166         }
2167
2168 out:
2169         if ((!req && !(mq->flags & MMC_QUEUE_NEW_REQUEST)) ||
2170              (cmd_flags & MMC_REQ_SPECIAL_MASK))
2171                 /*
2172                  * Release host when there are no more requests
2173                  * and after special request(discard, flush) is done.
2174                  * In case sepecial request, there is no reentry to
2175                  * the 'mmc_blk_issue_rq' with 'mqrq_prev->req'.
2176                  */
2177                 mmc_put_card(card);
2178         return ret;
2179 }
2180
2181 static inline int mmc_blk_readonly(struct mmc_card *card)
2182 {
2183         return mmc_card_readonly(card) ||
2184                !(card->csd.cmdclass & CCC_BLOCK_WRITE);
2185 }
2186
2187 static struct mmc_blk_data *mmc_blk_alloc_req(struct mmc_card *card,
2188                                               struct device *parent,
2189                                               sector_t size,
2190                                               bool default_ro,
2191                                               const char *subname,
2192                                               int area_type)
2193 {
2194         struct mmc_blk_data *md;
2195         int devidx, ret;
2196
2197         devidx = find_first_zero_bit(dev_use, max_devices);
2198         if (devidx >= max_devices)
2199                 return ERR_PTR(-ENOSPC);
2200         __set_bit(devidx, dev_use);
2201
2202         md = kzalloc(sizeof(struct mmc_blk_data), GFP_KERNEL);
2203         if (!md) {
2204                 ret = -ENOMEM;
2205                 goto out;
2206         }
2207
2208         /*
2209          * !subname implies we are creating main mmc_blk_data that will be
2210          * associated with mmc_card with dev_set_drvdata. Due to device
2211          * partitions, devidx will not coincide with a per-physical card
2212          * index anymore so we keep track of a name index.
2213          */
2214         if (!subname) {
2215                 md->name_idx = find_first_zero_bit(name_use, max_devices);
2216                 __set_bit(md->name_idx, name_use);
2217         } else
2218                 md->name_idx = ((struct mmc_blk_data *)
2219                                 dev_to_disk(parent)->private_data)->name_idx;
2220
2221         md->area_type = area_type;
2222
2223         /*
2224          * Set the read-only status based on the supported commands
2225          * and the write protect switch.
2226          */
2227         md->read_only = mmc_blk_readonly(card);
2228
2229         md->disk = alloc_disk(perdev_minors);
2230         if (md->disk == NULL) {
2231                 ret = -ENOMEM;
2232                 goto err_kfree;
2233         }
2234
2235         spin_lock_init(&md->lock);
2236         INIT_LIST_HEAD(&md->part);
2237         md->usage = 1;
2238
2239         ret = mmc_init_queue(&md->queue, card, &md->lock, subname);
2240         if (ret)
2241                 goto err_putdisk;
2242
2243         md->queue.issue_fn = mmc_blk_issue_rq;
2244         md->queue.data = md;
2245
2246         md->disk->major = MMC_BLOCK_MAJOR;
2247         md->disk->first_minor = devidx * perdev_minors;
2248         md->disk->fops = &mmc_bdops;
2249         md->disk->private_data = md;
2250         md->disk->queue = md->queue.queue;
2251         md->disk->driverfs_dev = parent;
2252         set_disk_ro(md->disk, md->read_only || default_ro);
2253         md->disk->flags = GENHD_FL_EXT_DEVT;
2254         if (area_type & (MMC_BLK_DATA_AREA_RPMB | MMC_BLK_DATA_AREA_BOOT))
2255                 md->disk->flags |= GENHD_FL_NO_PART_SCAN;
2256
2257         /*
2258          * As discussed on lkml, GENHD_FL_REMOVABLE should:
2259          *
2260          * - be set for removable media with permanent block devices
2261          * - be unset for removable block devices with permanent media
2262          *
2263          * Since MMC block devices clearly fall under the second
2264          * case, we do not set GENHD_FL_REMOVABLE.  Userspace
2265          * should use the block device creation/destruction hotplug
2266          * messages to tell when the card is present.
2267          */
2268
2269         snprintf(md->disk->disk_name, sizeof(md->disk->disk_name),
2270                  "mmcblk%u%s", md->name_idx, subname ? subname : "");
2271
2272         if (mmc_card_mmc(card))
2273                 blk_queue_logical_block_size(md->queue.queue,
2274                                              card->ext_csd.data_sector_size);
2275         else
2276                 blk_queue_logical_block_size(md->queue.queue, 512);
2277
2278         set_capacity(md->disk, size);
2279
2280         if (mmc_host_cmd23(card->host)) {
2281                 if (mmc_card_mmc(card) ||
2282                     (mmc_card_sd(card) &&
2283                      card->scr.cmds & SD_SCR_CMD23_SUPPORT))
2284                         md->flags |= MMC_BLK_CMD23;
2285         }
2286
2287         if (mmc_card_mmc(card) &&
2288             md->flags & MMC_BLK_CMD23 &&
2289             ((card->ext_csd.rel_param & EXT_CSD_WR_REL_PARAM_EN) ||
2290              card->ext_csd.rel_sectors)) {
2291                 md->flags |= MMC_BLK_REL_WR;
2292                 blk_queue_flush(md->queue.queue, REQ_FLUSH | REQ_FUA);
2293         }
2294
2295         if (mmc_card_mmc(card) &&
2296             (area_type == MMC_BLK_DATA_AREA_MAIN) &&
2297             (md->flags & MMC_BLK_CMD23) &&
2298             card->ext_csd.packed_event_en) {
2299                 if (!mmc_packed_init(&md->queue, card))
2300                         md->flags |= MMC_BLK_PACKED_CMD;
2301         }
2302
2303         return md;
2304
2305  err_putdisk:
2306         put_disk(md->disk);
2307  err_kfree:
2308         kfree(md);
2309  out:
2310         return ERR_PTR(ret);
2311 }
2312
2313 static struct mmc_blk_data *mmc_blk_alloc(struct mmc_card *card)
2314 {
2315         sector_t size;
2316
2317         if (!mmc_card_sd(card) && mmc_card_blockaddr(card)) {
2318                 /*
2319                  * The EXT_CSD sector count is in number or 512 byte
2320                  * sectors.
2321                  */
2322                 size = card->ext_csd.sectors;
2323         } else {
2324                 /*
2325                  * The CSD capacity field is in units of read_blkbits.
2326                  * set_capacity takes units of 512 bytes.
2327                  */
2328                 size = (typeof(sector_t))card->csd.capacity
2329                         << (card->csd.read_blkbits - 9);
2330         }
2331
2332         return mmc_blk_alloc_req(card, &card->dev, size, false, NULL,
2333                                         MMC_BLK_DATA_AREA_MAIN);
2334 }
2335
2336 static int mmc_blk_alloc_part(struct mmc_card *card,
2337                               struct mmc_blk_data *md,
2338                               unsigned int part_type,
2339                               sector_t size,
2340                               bool default_ro,
2341                               const char *subname,
2342                               int area_type)
2343 {
2344         char cap_str[10];
2345         struct mmc_blk_data *part_md;
2346
2347         part_md = mmc_blk_alloc_req(card, disk_to_dev(md->disk), size, default_ro,
2348                                     subname, area_type);
2349         if (IS_ERR(part_md))
2350                 return PTR_ERR(part_md);
2351         part_md->part_type = part_type;
2352         list_add(&part_md->part, &md->part);
2353
2354         string_get_size((u64)get_capacity(part_md->disk), 512, STRING_UNITS_2,
2355                         cap_str, sizeof(cap_str));
2356         pr_info("%s: %s %s partition %u %s\n",
2357                part_md->disk->disk_name, mmc_card_id(card),
2358                mmc_card_name(card), part_md->part_type, cap_str);
2359         return 0;
2360 }
2361
2362 /* MMC Physical partitions consist of two boot partitions and
2363  * up to four general purpose partitions.
2364  * For each partition enabled in EXT_CSD a block device will be allocatedi
2365  * to provide access to the partition.
2366  */
2367
2368 static int mmc_blk_alloc_parts(struct mmc_card *card, struct mmc_blk_data *md)
2369 {
2370         int idx, ret = 0;
2371
2372         if (!mmc_card_mmc(card))
2373                 return 0;
2374
2375         for (idx = 0; idx < card->nr_parts; idx++) {
2376                 if (card->part[idx].size) {
2377                         ret = mmc_blk_alloc_part(card, md,
2378                                 card->part[idx].part_cfg,
2379                                 card->part[idx].size >> 9,
2380                                 card->part[idx].force_ro,
2381                                 card->part[idx].name,
2382                                 card->part[idx].area_type);
2383                         if (ret)
2384                                 return ret;
2385                 }
2386         }
2387
2388         return ret;
2389 }
2390
2391 static void mmc_blk_remove_req(struct mmc_blk_data *md)
2392 {
2393         struct mmc_card *card;
2394
2395         if (md) {
2396                 /*
2397                  * Flush remaining requests and free queues. It
2398                  * is freeing the queue that stops new requests
2399                  * from being accepted.
2400                  */
2401                 card = md->queue.card;
2402                 mmc_cleanup_queue(&md->queue);
2403                 if (md->flags & MMC_BLK_PACKED_CMD)
2404                         mmc_packed_clean(&md->queue);
2405                 if (md->disk->flags & GENHD_FL_UP) {
2406                         device_remove_file(disk_to_dev(md->disk), &md->force_ro);
2407                         if ((md->area_type & MMC_BLK_DATA_AREA_BOOT) &&
2408                                         card->ext_csd.boot_ro_lockable)
2409                                 device_remove_file(disk_to_dev(md->disk),
2410                                         &md->power_ro_lock);
2411
2412                         del_gendisk(md->disk);
2413                 }
2414                 mmc_blk_put(md);
2415         }
2416 }
2417
2418 static void mmc_blk_remove_parts(struct mmc_card *card,
2419                                  struct mmc_blk_data *md)
2420 {
2421         struct list_head *pos, *q;
2422         struct mmc_blk_data *part_md;
2423
2424         __clear_bit(md->name_idx, name_use);
2425         list_for_each_safe(pos, q, &md->part) {
2426                 part_md = list_entry(pos, struct mmc_blk_data, part);
2427                 list_del(pos);
2428                 mmc_blk_remove_req(part_md);
2429         }
2430 }
2431
2432 static int mmc_add_disk(struct mmc_blk_data *md)
2433 {
2434         int ret;
2435         struct mmc_card *card = md->queue.card;
2436
2437         add_disk(md->disk);
2438         md->force_ro.show = force_ro_show;
2439         md->force_ro.store = force_ro_store;
2440         sysfs_attr_init(&md->force_ro.attr);
2441         md->force_ro.attr.name = "force_ro";
2442         md->force_ro.attr.mode = S_IRUGO | S_IWUSR;
2443         ret = device_create_file(disk_to_dev(md->disk), &md->force_ro);
2444         if (ret)
2445                 goto force_ro_fail;
2446
2447         if ((md->area_type & MMC_BLK_DATA_AREA_BOOT) &&
2448              card->ext_csd.boot_ro_lockable) {
2449                 umode_t mode;
2450
2451                 if (card->ext_csd.boot_ro_lock & EXT_CSD_BOOT_WP_B_PWR_WP_DIS)
2452                         mode = S_IRUGO;
2453                 else
2454                         mode = S_IRUGO | S_IWUSR;
2455
2456                 md->power_ro_lock.show = power_ro_lock_show;
2457                 md->power_ro_lock.store = power_ro_lock_store;
2458                 sysfs_attr_init(&md->power_ro_lock.attr);
2459                 md->power_ro_lock.attr.mode = mode;
2460                 md->power_ro_lock.attr.name =
2461                                         "ro_lock_until_next_power_on";
2462                 ret = device_create_file(disk_to_dev(md->disk),
2463                                 &md->power_ro_lock);
2464                 if (ret)
2465                         goto power_ro_lock_fail;
2466         }
2467         return ret;
2468
2469 power_ro_lock_fail:
2470         device_remove_file(disk_to_dev(md->disk), &md->force_ro);
2471 force_ro_fail:
2472         del_gendisk(md->disk);
2473
2474         return ret;
2475 }
2476
2477 #define CID_MANFID_SANDISK      0x2
2478 #define CID_MANFID_TOSHIBA      0x11
2479 #define CID_MANFID_MICRON       0x13
2480 #define CID_MANFID_SAMSUNG      0x15
2481 #define CID_MANFID_KINGSTON     0x70
2482
2483 static const struct mmc_fixup blk_fixups[] =
2484 {
2485         MMC_FIXUP("SEM02G", CID_MANFID_SANDISK, 0x100, add_quirk,
2486                   MMC_QUIRK_INAND_CMD38),
2487         MMC_FIXUP("SEM04G", CID_MANFID_SANDISK, 0x100, add_quirk,
2488                   MMC_QUIRK_INAND_CMD38),
2489         MMC_FIXUP("SEM08G", CID_MANFID_SANDISK, 0x100, add_quirk,
2490                   MMC_QUIRK_INAND_CMD38),
2491         MMC_FIXUP("SEM16G", CID_MANFID_SANDISK, 0x100, add_quirk,
2492                   MMC_QUIRK_INAND_CMD38),
2493         MMC_FIXUP("SEM32G", CID_MANFID_SANDISK, 0x100, add_quirk,
2494                   MMC_QUIRK_INAND_CMD38),
2495
2496         /*
2497          * Some MMC cards experience performance degradation with CMD23
2498          * instead of CMD12-bounded multiblock transfers. For now we'll
2499          * black list what's bad...
2500          * - Certain Toshiba cards.
2501          *
2502          * N.B. This doesn't affect SD cards.
2503          */
2504         MMC_FIXUP("SDMB-32", CID_MANFID_SANDISK, CID_OEMID_ANY, add_quirk_mmc,
2505                   MMC_QUIRK_BLK_NO_CMD23),
2506         MMC_FIXUP("SDM032", CID_MANFID_SANDISK, CID_OEMID_ANY, add_quirk_mmc,
2507                   MMC_QUIRK_BLK_NO_CMD23),
2508         MMC_FIXUP("MMC08G", CID_MANFID_TOSHIBA, CID_OEMID_ANY, add_quirk_mmc,
2509                   MMC_QUIRK_BLK_NO_CMD23),
2510         MMC_FIXUP("MMC16G", CID_MANFID_TOSHIBA, CID_OEMID_ANY, add_quirk_mmc,
2511                   MMC_QUIRK_BLK_NO_CMD23),
2512         MMC_FIXUP("MMC32G", CID_MANFID_TOSHIBA, CID_OEMID_ANY, add_quirk_mmc,
2513                   MMC_QUIRK_BLK_NO_CMD23),
2514
2515         /*
2516          * Some Micron MMC cards needs longer data read timeout than
2517          * indicated in CSD.
2518          */
2519         MMC_FIXUP(CID_NAME_ANY, CID_MANFID_MICRON, 0x200, add_quirk_mmc,
2520                   MMC_QUIRK_LONG_READ_TIME),
2521
2522         /*
2523          * On these Samsung MoviNAND parts, performing secure erase or
2524          * secure trim can result in unrecoverable corruption due to a
2525          * firmware bug.
2526          */
2527         MMC_FIXUP("M8G2FA", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2528                   MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2529         MMC_FIXUP("MAG4FA", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2530                   MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2531         MMC_FIXUP("MBG8FA", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2532                   MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2533         MMC_FIXUP("MCGAFA", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2534                   MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2535         MMC_FIXUP("VAL00M", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2536                   MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2537         MMC_FIXUP("VYL00M", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2538                   MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2539         MMC_FIXUP("KYL00M", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2540                   MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2541         MMC_FIXUP("VZL00M", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2542                   MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2543
2544         /*
2545          *  On Some Kingston eMMCs, performing trim can result in
2546          *  unrecoverable data conrruption occasionally due to a firmware bug.
2547          */
2548         MMC_FIXUP("V10008", CID_MANFID_KINGSTON, CID_OEMID_ANY, add_quirk_mmc,
2549                   MMC_QUIRK_TRIM_BROKEN),
2550         MMC_FIXUP("V10016", CID_MANFID_KINGSTON, CID_OEMID_ANY, add_quirk_mmc,
2551                   MMC_QUIRK_TRIM_BROKEN),
2552
2553         END_FIXUP
2554 };
2555
2556 extern struct mmc_card *this_card;
2557 static int mmc_blk_probe(struct mmc_card *card)
2558 {
2559         struct mmc_blk_data *md, *part_md;
2560         char cap_str[10];
2561
2562         /*
2563          * Check that the card supports the command class(es) we need.
2564          */
2565         if (!(card->csd.cmdclass & CCC_BLOCK_READ))
2566                 return -ENODEV;
2567
2568         mmc_fixup_device(card, blk_fixups);
2569
2570         md = mmc_blk_alloc(card);
2571         if (IS_ERR(md))
2572                 return PTR_ERR(md);
2573
2574         string_get_size((u64)get_capacity(md->disk), 512, STRING_UNITS_2,
2575                         cap_str, sizeof(cap_str));
2576         pr_info("%s: %s %s %s %s\n",
2577                 md->disk->disk_name, mmc_card_id(card), mmc_card_name(card),
2578                 cap_str, md->read_only ? "(ro)" : "");
2579
2580         if (mmc_blk_alloc_parts(card, md))
2581                 goto out;
2582
2583         dev_set_drvdata(&card->dev, md);
2584
2585         #if defined(CONFIG_MMC_DW_ROCKCHIP)
2586         if (card->host->restrict_caps & RESTRICT_CARD_TYPE_EMMC) {
2587                 this_card = card;
2588                 md->disk->emmc_disk = 1;
2589         } else {
2590                 md->disk->emmc_disk = 0;
2591         }
2592         #endif
2593
2594         if (mmc_add_disk(md))
2595                 goto out;
2596
2597         list_for_each_entry(part_md, &md->part, part) {
2598                 if (mmc_add_disk(part_md))
2599                         goto out;
2600         }
2601
2602         pm_runtime_set_autosuspend_delay(&card->dev, 3000);
2603         pm_runtime_use_autosuspend(&card->dev);
2604
2605         /*
2606          * Don't enable runtime PM for SD-combo cards here. Leave that
2607          * decision to be taken during the SDIO init sequence instead.
2608          */
2609         if (card->type != MMC_TYPE_SD_COMBO) {
2610                 pm_runtime_set_active(&card->dev);
2611                 pm_runtime_enable(&card->dev);
2612         }
2613
2614         return 0;
2615
2616  out:
2617         mmc_blk_remove_parts(card, md);
2618         mmc_blk_remove_req(md);
2619         return 0;
2620 }
2621
2622 static void mmc_blk_remove(struct mmc_card *card)
2623 {
2624         struct mmc_blk_data *md = dev_get_drvdata(&card->dev);
2625
2626         #if defined(CONFIG_MMC_DW_ROCKCHIP)
2627         if (card->host->restrict_caps & RESTRICT_CARD_TYPE_EMMC)
2628                 this_card = NULL;
2629         #endif
2630
2631         mmc_blk_remove_parts(card, md);
2632         pm_runtime_get_sync(&card->dev);
2633         mmc_claim_host(card->host);
2634         mmc_blk_part_switch(card, md);
2635         mmc_release_host(card->host);
2636         if (card->type != MMC_TYPE_SD_COMBO)
2637                 pm_runtime_disable(&card->dev);
2638         pm_runtime_put_noidle(&card->dev);
2639         mmc_blk_remove_req(md);
2640         dev_set_drvdata(&card->dev, NULL);
2641 }
2642
2643 static int _mmc_blk_suspend(struct mmc_card *card)
2644 {
2645         struct mmc_blk_data *part_md;
2646         struct mmc_blk_data *md = dev_get_drvdata(&card->dev);
2647
2648         if (md) {
2649                 mmc_queue_suspend(&md->queue);
2650                 list_for_each_entry(part_md, &md->part, part) {
2651                         mmc_queue_suspend(&part_md->queue);
2652                 }
2653         }
2654         return 0;
2655 }
2656
2657 static void mmc_blk_shutdown(struct mmc_card *card)
2658 {
2659         _mmc_blk_suspend(card);
2660 }
2661
2662 #ifdef CONFIG_PM_SLEEP
2663 static int mmc_blk_suspend(struct device *dev)
2664 {
2665         struct mmc_card *card = mmc_dev_to_card(dev);
2666
2667         return _mmc_blk_suspend(card);
2668 }
2669
2670 static int mmc_blk_resume(struct device *dev)
2671 {
2672         struct mmc_blk_data *part_md;
2673         struct mmc_blk_data *md = dev_get_drvdata(dev);
2674
2675         if (md) {
2676                 /*
2677                  * Resume involves the card going into idle state,
2678                  * so current partition is always the main one.
2679                  */
2680                 md->part_curr = md->part_type;
2681                 mmc_queue_resume(&md->queue);
2682                 list_for_each_entry(part_md, &md->part, part) {
2683                         mmc_queue_resume(&part_md->queue);
2684                 }
2685         }
2686         return 0;
2687 }
2688 #endif
2689
2690 static SIMPLE_DEV_PM_OPS(mmc_blk_pm_ops, mmc_blk_suspend, mmc_blk_resume);
2691
2692 static struct mmc_driver mmc_driver = {
2693         .drv            = {
2694                 .name   = "mmcblk",
2695                 .pm     = &mmc_blk_pm_ops,
2696         },
2697         .probe          = mmc_blk_probe,
2698         .remove         = mmc_blk_remove,
2699         .shutdown       = mmc_blk_shutdown,
2700 };
2701
2702 static int __init mmc_blk_init(void)
2703 {
2704         int res;
2705
2706         if (perdev_minors != CONFIG_MMC_BLOCK_MINORS)
2707                 pr_info("mmcblk: using %d minors per device\n", perdev_minors);
2708
2709         max_devices = min(MAX_DEVICES, (1 << MINORBITS) / perdev_minors);
2710
2711         res = register_blkdev(MMC_BLOCK_MAJOR, "mmc");
2712         if (res)
2713                 goto out;
2714
2715         res = mmc_register_driver(&mmc_driver);
2716         if (res)
2717                 goto out2;
2718
2719         return 0;
2720  out2:
2721         unregister_blkdev(MMC_BLOCK_MAJOR, "mmc");
2722  out:
2723         return res;
2724 }
2725
2726 static void __exit mmc_blk_exit(void)
2727 {
2728         mmc_unregister_driver(&mmc_driver);
2729         unregister_blkdev(MMC_BLOCK_MAJOR, "mmc");
2730 }
2731
2732 module_init(mmc_blk_init);
2733 module_exit(mmc_blk_exit);
2734
2735 MODULE_LICENSE("GPL");
2736 MODULE_DESCRIPTION("Multimedia Card (MMC) block device driver");
2737