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