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 #include <linux/idr.h>
  39
  40 #include <linux/mmc/ioctl.h>
  41 #include <linux/mmc/card.h>
  42 #include <linux/mmc/host.h>
  43 #include <linux/mmc/mmc.h>
  44 #include <linux/mmc/sd.h>
  45
  46 #include <asm/uaccess.h>
  47
  48 #include "queue.h"
  49 #include "block.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  * limited by the MAX_DEVICES below.
  84  */
  85 static int max_devices;
  86
  87 #define MAX_DEVICES 256
  88
  89 static DEFINE_IDA(mmc_blk_ida);
  90 static DEFINE_SPINLOCK(mmc_blk_lock);
  91
  92 /*
  93  * There is one mmc_blk_data per slot.
  94  */
  95 struct mmc_blk_data {
  96         spinlock_t      lock;
  97         struct device   *parent;
  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    reset_done;
 111 #define MMC_BLK_READ            BIT(0)
 112 #define MMC_BLK_WRITE           BIT(1)
 113 #define MMC_BLK_DISCARD         BIT(2)
 114 #define MMC_BLK_SECDISCARD      BIT(3)
 115
 116         /*
 117          * Only set in main mmc_blk_data associated
 118          * with mmc_card with dev_set_drvdata, and keeps
 119          * track of the current selected device partition.
 120          */
 121         unsigned int    part_curr;
 122         struct device_attribute force_ro;
 123         struct device_attribute power_ro_lock;
 124         int     area_type;
 125 };
 126
 127 static DEFINE_MUTEX(open_lock);
 128
 129 enum {
 130         MMC_PACKED_NR_IDX = -1,
 131         MMC_PACKED_NR_ZERO,
 132         MMC_PACKED_NR_SINGLE,
 133 };
 134
 135 module_param(perdev_minors, int, 0444);
 136 MODULE_PARM_DESC(perdev_minors, "Minors numbers to allocate per device");
 137
 138 static inline int mmc_blk_part_switch(struct mmc_card *card,
 139                                       struct mmc_blk_data *md);
 140 static int get_card_status(struct mmc_card *card, u32 *status, int retries);
 141
 142 static inline void mmc_blk_clear_packed(struct mmc_queue_req *mqrq)
 143 {
 144         struct mmc_packed *packed = mqrq->packed;
 145
 146         mqrq->cmd_type = MMC_PACKED_NONE;
 147         packed->nr_entries = MMC_PACKED_NR_ZERO;
 148         packed->idx_failure = MMC_PACKED_NR_IDX;
 149         packed->retries = 0;
 150         packed->blocks = 0;
 151 }
 152
 153 static struct mmc_blk_data *mmc_blk_get(struct gendisk *disk)
 154 {
 155         struct mmc_blk_data *md;
 156
 157         mutex_lock(&open_lock);
 158         md = disk->private_data;
 159         if (md && md->usage == 0)
 160                 md = NULL;
 161         if (md)
 162                 md->usage++;
 163         mutex_unlock(&open_lock);
 164
 165         return md;
 166 }
 167
 168 static inline int mmc_get_devidx(struct gendisk *disk)
 169 {
 170         int devidx = disk->first_minor / perdev_minors;
 171         return devidx;
 172 }
 173
 174 static void mmc_blk_put(struct mmc_blk_data *md)
 175 {
 176         mutex_lock(&open_lock);
 177         md->usage--;
 178         if (md->usage == 0) {
 179                 int devidx = mmc_get_devidx(md->disk);
 180                 blk_cleanup_queue(md->queue.queue);
 181
 182                 spin_lock(&mmc_blk_lock);
 183                 ida_remove(&mmc_blk_ida, devidx);
 184                 spin_unlock(&mmc_blk_lock);
 185
 186                 put_disk(md->disk);
 187                 kfree(md);
 188         }
 189         mutex_unlock(&open_lock);
 190 }
 191
 192 static ssize_t power_ro_lock_show(struct device *dev,
 193                 struct device_attribute *attr, char *buf)
 194 {
 195         int ret;
 196         struct mmc_blk_data *md = mmc_blk_get(dev_to_disk(dev));
 197         struct mmc_card *card = md->queue.card;
 198         int locked = 0;
 199
 200         if (card->ext_csd.boot_ro_lock & EXT_CSD_BOOT_WP_B_PERM_WP_EN)
 201                 locked = 2;
 202         else if (card->ext_csd.boot_ro_lock & EXT_CSD_BOOT_WP_B_PWR_WP_EN)
 203                 locked = 1;
 204
 205         ret = snprintf(buf, PAGE_SIZE, "%d\n", locked);
 206
 207         mmc_blk_put(md);
 208
 209         return ret;
 210 }
 211
 212 static ssize_t power_ro_lock_store(struct device *dev,
 213                 struct device_attribute *attr, const char *buf, size_t count)
 214 {
 215         int ret;
 216         struct mmc_blk_data *md, *part_md;
 217         struct mmc_card *card;
 218         unsigned long set;
 219
 220         if (kstrtoul(buf, 0, &set))
 221                 return -EINVAL;
 222
 223         if (set != 1)
 224                 return count;
 225
 226         md = mmc_blk_get(dev_to_disk(dev));
 227         card = md->queue.card;
 228
 229         mmc_get_card(card);
 230
 231         ret = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_BOOT_WP,
 232                                 card->ext_csd.boot_ro_lock |
 233                                 EXT_CSD_BOOT_WP_B_PWR_WP_EN,
 234                                 card->ext_csd.part_time);
 235         if (ret)
 236                 pr_err("%s: Locking boot partition ro until next power on failed: %d\n", md->disk->disk_name, ret);
 237         else
 238                 card->ext_csd.boot_ro_lock |= EXT_CSD_BOOT_WP_B_PWR_WP_EN;
 239
 240         mmc_put_card(card);
 241
 242         if (!ret) {
 243                 pr_info("%s: Locking boot partition ro until next power on\n",
 244                         md->disk->disk_name);
 245                 set_disk_ro(md->disk, 1);
 246
 247                 list_for_each_entry(part_md, &md->part, part)
 248                         if (part_md->area_type == MMC_BLK_DATA_AREA_BOOT) {
 249                                 pr_info("%s: Locking boot partition ro until next power on\n", part_md->disk->disk_name);
 250                                 set_disk_ro(part_md->disk, 1);
 251                         }
 252         }
 253
 254         mmc_blk_put(md);
 255         return count;
 256 }
 257
 258 static ssize_t force_ro_show(struct device *dev, struct device_attribute *attr,
 259                              char *buf)
 260 {
 261         int ret;
 262         struct mmc_blk_data *md = mmc_blk_get(dev_to_disk(dev));
 263
 264         ret = snprintf(buf, PAGE_SIZE, "%d\n",
 265                        get_disk_ro(dev_to_disk(dev)) ^
 266                        md->read_only);
 267         mmc_blk_put(md);
 268         return ret;
 269 }
 270
 271 static ssize_t force_ro_store(struct device *dev, struct device_attribute *attr,
 272                               const char *buf, size_t count)
 273 {
 274         int ret;
 275         char *end;
 276         struct mmc_blk_data *md = mmc_blk_get(dev_to_disk(dev));
 277         unsigned long set = simple_strtoul(buf, &end, 0);
 278         if (end == buf) {
 279                 ret = -EINVAL;
 280                 goto out;
 281         }
 282
 283         set_disk_ro(dev_to_disk(dev), set || md->read_only);
 284         ret = count;
 285 out:
 286         mmc_blk_put(md);
 287         return ret;
 288 }
 289
 290 static int mmc_blk_open(struct block_device *bdev, fmode_t mode)
 291 {
 292         struct mmc_blk_data *md = mmc_blk_get(bdev->bd_disk);
 293         int ret = -ENXIO;
 294
 295         mutex_lock(&block_mutex);
 296         if (md) {
 297                 if (md->usage == 2)
 298                         check_disk_change(bdev);
 299                 ret = 0;
 300
 301                 if ((mode & FMODE_WRITE) && md->read_only) {
 302                         mmc_blk_put(md);
 303                         ret = -EROFS;
 304                 }
 305         }
 306         mutex_unlock(&block_mutex);
 307
 308         return ret;
 309 }
 310
 311 static void mmc_blk_release(struct gendisk *disk, fmode_t mode)
 312 {
 313         struct mmc_blk_data *md = disk->private_data;
 314
 315         mutex_lock(&block_mutex);
 316         mmc_blk_put(md);
 317         mutex_unlock(&block_mutex);
 318 }
 319
 320 static int
 321 mmc_blk_getgeo(struct block_device *bdev, struct hd_geometry *geo)
 322 {
 323         geo->cylinders = get_capacity(bdev->bd_disk) / (4 * 16);
 324         geo->heads = 4;
 325         geo->sectors = 16;
 326         return 0;
 327 }
 328
 329 struct mmc_blk_ioc_data {
 330         struct mmc_ioc_cmd ic;
 331         unsigned char *buf;
 332         u64 buf_bytes;
 333 };
 334
 335 static struct mmc_blk_ioc_data *mmc_blk_ioctl_copy_from_user(
 336         struct mmc_ioc_cmd __user *user)
 337 {
 338         struct mmc_blk_ioc_data *idata;
 339         int err;
 340
 341         idata = kmalloc(sizeof(*idata), GFP_KERNEL);
 342         if (!idata) {
 343                 err = -ENOMEM;
 344                 goto out;
 345         }
 346
 347         if (copy_from_user(&idata->ic, user, sizeof(idata->ic))) {
 348                 err = -EFAULT;
 349                 goto idata_err;
 350         }
 351
 352         idata->buf_bytes = (u64) idata->ic.blksz * idata->ic.blocks;
 353         if (idata->buf_bytes > MMC_IOC_MAX_BYTES) {
 354                 err = -EOVERFLOW;
 355                 goto idata_err;
 356         }
 357
 358         if (!idata->buf_bytes) {
 359                 idata->buf = NULL;
 360                 return idata;
 361         }
 362
 363         idata->buf = kmalloc(idata->buf_bytes, GFP_KERNEL);
 364         if (!idata->buf) {
 365                 err = -ENOMEM;
 366                 goto idata_err;
 367         }
 368
 369         if (copy_from_user(idata->buf, (void __user *)(unsigned long)
 370                                         idata->ic.data_ptr, idata->buf_bytes)) {
 371                 err = -EFAULT;
 372                 goto copy_err;
 373         }
 374
 375         return idata;
 376
 377 copy_err:
 378         kfree(idata->buf);
 379 idata_err:
 380         kfree(idata);
 381 out:
 382         return ERR_PTR(err);
 383 }
 384
 385 static int mmc_blk_ioctl_copy_to_user(struct mmc_ioc_cmd __user *ic_ptr,
 386                                       struct mmc_blk_ioc_data *idata)
 387 {
 388         struct mmc_ioc_cmd *ic = &idata->ic;
 389
 390         if (copy_to_user(&(ic_ptr->response), ic->response,
 391                          sizeof(ic->response)))
 392                 return -EFAULT;
 393
 394         if (!idata->ic.write_flag) {
 395                 if (copy_to_user((void __user *)(unsigned long)ic->data_ptr,
 396                                  idata->buf, idata->buf_bytes))
 397                         return -EFAULT;
 398         }
 399
 400         return 0;
 401 }
 402
 403 static int ioctl_rpmb_card_status_poll(struct mmc_card *card, u32 *status,
 404                                        u32 retries_max)
 405 {
 406         int err;
 407         u32 retry_count = 0;
 408
 409         if (!status || !retries_max)
 410                 return -EINVAL;
 411
 412         do {
 413                 err = get_card_status(card, status, 5);
 414                 if (err)
 415                         break;
 416
 417                 if (!R1_STATUS(*status) &&
 418                                 (R1_CURRENT_STATE(*status) != R1_STATE_PRG))
 419                         break; /* RPMB programming operation complete */
 420
 421                 /*
 422                  * Rechedule to give the MMC device a chance to continue
 423                  * processing the previous command without being polled too
 424                  * frequently.
 425                  */
 426                 usleep_range(1000, 5000);
 427         } while (++retry_count < retries_max);
 428
 429         if (retry_count == retries_max)
 430                 err = -EPERM;
 431
 432         return err;
 433 }
 434
 435 static int ioctl_do_sanitize(struct mmc_card *card)
 436 {
 437         int err;
 438
 439         if (!mmc_can_sanitize(card)) {
 440                         pr_warn("%s: %s - SANITIZE is not supported\n",
 441                                 mmc_hostname(card->host), __func__);
 442                         err = -EOPNOTSUPP;
 443                         goto out;
 444         }
 445
 446         pr_debug("%s: %s - SANITIZE IN PROGRESS...\n",
 447                 mmc_hostname(card->host), __func__);
 448
 449         err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
 450                                         EXT_CSD_SANITIZE_START, 1,
 451                                         MMC_SANITIZE_REQ_TIMEOUT);
 452
 453         if (err)
 454                 pr_err("%s: %s - EXT_CSD_SANITIZE_START failed. err=%d\n",
 455                        mmc_hostname(card->host), __func__, err);
 456
 457         pr_debug("%s: %s - SANITIZE COMPLETED\n", mmc_hostname(card->host),
 458                                              __func__);
 459 out:
 460         return err;
 461 }
 462
 463 static int __mmc_blk_ioctl_cmd(struct mmc_card *card, struct mmc_blk_data *md,
 464                                struct mmc_blk_ioc_data *idata)
 465 {
 466         struct mmc_command cmd = {0};
 467         struct mmc_data data = {0};
 468         struct mmc_request mrq = {NULL};
 469         struct scatterlist sg;
 470         int err;
 471         int is_rpmb = false;
 472         u32 status = 0;
 473
 474         if (!card || !md || !idata)
 475                 return -EINVAL;
 476
 477         if (md->area_type & MMC_BLK_DATA_AREA_RPMB)
 478                 is_rpmb = true;
 479
 480         cmd.opcode = idata->ic.opcode;
 481         cmd.arg = idata->ic.arg;
 482         cmd.flags = idata->ic.flags;
 483
 484         if (idata->buf_bytes) {
 485                 data.sg = &sg;
 486                 data.sg_len = 1;
 487                 data.blksz = idata->ic.blksz;
 488                 data.blocks = idata->ic.blocks;
 489
 490                 sg_init_one(data.sg, idata->buf, idata->buf_bytes);
 491
 492                 if (idata->ic.write_flag)
 493                         data.flags = MMC_DATA_WRITE;
 494                 else
 495                         data.flags = MMC_DATA_READ;
 496
 497                 /* data.flags must already be set before doing this. */
 498                 mmc_set_data_timeout(&data, card);
 499
 500                 /* Allow overriding the timeout_ns for empirical tuning. */
 501                 if (idata->ic.data_timeout_ns)
 502                         data.timeout_ns = idata->ic.data_timeout_ns;
 503
 504                 if ((cmd.flags & MMC_RSP_R1B) == MMC_RSP_R1B) {
 505                         /*
 506                          * Pretend this is a data transfer and rely on the
 507                          * host driver to compute timeout.  When all host
 508                          * drivers support cmd.cmd_timeout for R1B, this
 509                          * can be changed to:
 510                          *
 511                          *     mrq.data = NULL;
 512                          *     cmd.cmd_timeout = idata->ic.cmd_timeout_ms;
 513                          */
 514                         data.timeout_ns = idata->ic.cmd_timeout_ms * 1000000;
 515                 }
 516
 517                 mrq.data = &data;
 518         }
 519
 520         mrq.cmd = &cmd;
 521
 522         err = mmc_blk_part_switch(card, md);
 523         if (err)
 524                 return err;
 525
 526         if (idata->ic.is_acmd) {
 527                 err = mmc_app_cmd(card->host, card);
 528                 if (err)
 529                         return err;
 530         }
 531
 532         if (is_rpmb) {
 533                 err = mmc_set_blockcount(card, data.blocks,
 534                         idata->ic.write_flag & (1 << 31));
 535                 if (err)
 536                         return err;
 537         }
 538
 539         if ((MMC_EXTRACT_INDEX_FROM_ARG(cmd.arg) == EXT_CSD_SANITIZE_START) &&
 540             (cmd.opcode == MMC_SWITCH)) {
 541                 err = ioctl_do_sanitize(card);
 542
 543                 if (err)
 544                         pr_err("%s: ioctl_do_sanitize() failed. err = %d",
 545                                __func__, err);
 546
 547                 return err;
 548         }
 549
 550         mmc_wait_for_req(card->host, &mrq);
 551
 552         if (cmd.error) {
 553                 dev_err(mmc_dev(card->host), "%s: cmd error %d\n",
 554                                                 __func__, cmd.error);
 555                 return cmd.error;
 556         }
 557         if (data.error) {
 558                 dev_err(mmc_dev(card->host), "%s: data error %d\n",
 559                                                 __func__, data.error);
 560                 return data.error;
 561         }
 562
 563         /*
 564          * According to the SD specs, some commands require a delay after
 565          * issuing the command.
 566          */
 567         if (idata->ic.postsleep_min_us)
 568                 usleep_range(idata->ic.postsleep_min_us, idata->ic.postsleep_max_us);
 569
 570         memcpy(&(idata->ic.response), cmd.resp, sizeof(cmd.resp));
 571
 572         if (is_rpmb) {
 573                 /*
 574                  * Ensure RPMB command has completed by polling CMD13
 575                  * "Send Status".
 576                  */
 577                 err = ioctl_rpmb_card_status_poll(card, &status, 5);
 578                 if (err)
 579                         dev_err(mmc_dev(card->host),
 580                                         "%s: Card Status=0x%08X, error %d\n",
 581                                         __func__, status, err);
 582         }
 583
 584         return err;
 585 }
 586
 587 static int mmc_blk_ioctl_cmd(struct block_device *bdev,
 588                              struct mmc_ioc_cmd __user *ic_ptr)
 589 {
 590         struct mmc_blk_ioc_data *idata;
 591         struct mmc_blk_data *md;
 592         struct mmc_card *card;
 593         int err = 0, ioc_err = 0;
 594
 595         /*
 596          * The caller must have CAP_SYS_RAWIO, and must be calling this on the
 597          * whole block device, not on a partition.  This prevents overspray
 598          * between sibling partitions.
 599          */
 600         if ((!capable(CAP_SYS_RAWIO)) || (bdev != bdev->bd_contains))
 601                 return -EPERM;
 602
 603         idata = mmc_blk_ioctl_copy_from_user(ic_ptr);
 604         if (IS_ERR(idata))
 605                 return PTR_ERR(idata);
 606
 607         md = mmc_blk_get(bdev->bd_disk);
 608         if (!md) {
 609                 err = -EINVAL;
 610                 goto cmd_err;
 611         }
 612
 613         card = md->queue.card;
 614         if (IS_ERR(card)) {
 615                 err = PTR_ERR(card);
 616                 goto cmd_done;
 617         }
 618
 619         mmc_get_card(card);
 620
 621         ioc_err = __mmc_blk_ioctl_cmd(card, md, idata);
 622
 623         /* Always switch back to main area after RPMB access */
 624         if (md->area_type & MMC_BLK_DATA_AREA_RPMB)
 625                 mmc_blk_part_switch(card, dev_get_drvdata(&card->dev));
 626
 627         mmc_put_card(card);
 628
 629         err = mmc_blk_ioctl_copy_to_user(ic_ptr, idata);
 630
 631 cmd_done:
 632         mmc_blk_put(md);
 633 cmd_err:
 634         kfree(idata->buf);
 635         kfree(idata);
 636         return ioc_err ? ioc_err : err;
 637 }
 638
 639 static int mmc_blk_ioctl_multi_cmd(struct block_device *bdev,
 640                                    struct mmc_ioc_multi_cmd __user *user)
 641 {
 642         struct mmc_blk_ioc_data **idata = NULL;
 643         struct mmc_ioc_cmd __user *cmds = user->cmds;
 644         struct mmc_card *card;
 645         struct mmc_blk_data *md;
 646         int i, err = 0, ioc_err = 0;
 647         __u64 num_of_cmds;
 648
 649         /*
 650          * The caller must have CAP_SYS_RAWIO, and must be calling this on the
 651          * whole block device, not on a partition.  This prevents overspray
 652          * between sibling partitions.
 653          */
 654         if ((!capable(CAP_SYS_RAWIO)) || (bdev != bdev->bd_contains))
 655                 return -EPERM;
 656
 657         if (copy_from_user(&num_of_cmds, &user->num_of_cmds,
 658                            sizeof(num_of_cmds)))
 659                 return -EFAULT;
 660
 661         if (num_of_cmds > MMC_IOC_MAX_CMDS)
 662                 return -EINVAL;
 663
 664         idata = kcalloc(num_of_cmds, sizeof(*idata), GFP_KERNEL);
 665         if (!idata)
 666                 return -ENOMEM;
 667
 668         for (i = 0; i < num_of_cmds; i++) {
 669                 idata[i] = mmc_blk_ioctl_copy_from_user(&cmds[i]);
 670                 if (IS_ERR(idata[i])) {
 671                         err = PTR_ERR(idata[i]);
 672                         num_of_cmds = i;
 673                         goto cmd_err;
 674                 }
 675         }
 676
 677         md = mmc_blk_get(bdev->bd_disk);
 678         if (!md) {
 679                 err = -EINVAL;
 680                 goto cmd_err;
 681         }
 682
 683         card = md->queue.card;
 684         if (IS_ERR(card)) {
 685                 err = PTR_ERR(card);
 686                 goto cmd_done;
 687         }
 688
 689         mmc_get_card(card);
 690
 691         for (i = 0; i < num_of_cmds && !ioc_err; i++)
 692                 ioc_err = __mmc_blk_ioctl_cmd(card, md, idata[i]);
 693
 694         /* Always switch back to main area after RPMB access */
 695         if (md->area_type & MMC_BLK_DATA_AREA_RPMB)
 696                 mmc_blk_part_switch(card, dev_get_drvdata(&card->dev));
 697
 698         mmc_put_card(card);
 699
 700         /* copy to user if data and response */
 701         for (i = 0; i < num_of_cmds && !err; i++)
 702                 err = mmc_blk_ioctl_copy_to_user(&cmds[i], idata[i]);
 703
 704 cmd_done:
 705         mmc_blk_put(md);
 706 cmd_err:
 707         for (i = 0; i < num_of_cmds; i++) {
 708                 kfree(idata[i]->buf);
 709                 kfree(idata[i]);
 710         }
 711         kfree(idata);
 712         return ioc_err ? ioc_err : err;
 713 }
 714
 715 static int mmc_blk_ioctl(struct block_device *bdev, fmode_t mode,
 716         unsigned int cmd, unsigned long arg)
 717 {
 718         switch (cmd) {
 719         case MMC_IOC_CMD:
 720                 return mmc_blk_ioctl_cmd(bdev,
 721                                 (struct mmc_ioc_cmd __user *)arg);
 722         case MMC_IOC_MULTI_CMD:
 723                 return mmc_blk_ioctl_multi_cmd(bdev,
 724                                 (struct mmc_ioc_multi_cmd __user *)arg);
 725         default:
 726                 return -EINVAL;
 727         }
 728 }
 729
 730 #ifdef CONFIG_COMPAT
 731 static int mmc_blk_compat_ioctl(struct block_device *bdev, fmode_t mode,
 732         unsigned int cmd, unsigned long arg)
 733 {
 734         return mmc_blk_ioctl(bdev, mode, cmd, (unsigned long) compat_ptr(arg));
 735 }
 736 #endif
 737
 738 static const struct block_device_operations mmc_bdops = {
 739         .open                   = mmc_blk_open,
 740         .release                = mmc_blk_release,
 741         .getgeo                 = mmc_blk_getgeo,
 742         .owner                  = THIS_MODULE,
 743         .ioctl                  = mmc_blk_ioctl,
 744 #ifdef CONFIG_COMPAT
 745         .compat_ioctl           = mmc_blk_compat_ioctl,
 746 #endif
 747 };
 748
 749 static inline int mmc_blk_part_switch(struct mmc_card *card,
 750                                       struct mmc_blk_data *md)
 751 {
 752         int ret;
 753         struct mmc_blk_data *main_md = dev_get_drvdata(&card->dev);
 754
 755         if (main_md->part_curr == md->part_type)
 756                 return 0;
 757
 758         if (mmc_card_mmc(card)) {
 759                 u8 part_config = card->ext_csd.part_config;
 760
 761                 if (md->part_type == EXT_CSD_PART_CONFIG_ACC_RPMB)
 762                         mmc_retune_pause(card->host);
 763
 764                 part_config &= ~EXT_CSD_PART_CONFIG_ACC_MASK;
 765                 part_config |= md->part_type;
 766
 767                 ret = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
 768                                  EXT_CSD_PART_CONFIG, part_config,
 769                                  card->ext_csd.part_time);
 770                 if (ret) {
 771                         if (md->part_type == EXT_CSD_PART_CONFIG_ACC_RPMB)
 772                                 mmc_retune_unpause(card->host);
 773                         return ret;
 774                 }
 775
 776                 card->ext_csd.part_config = part_config;
 777
 778                 if (main_md->part_curr == EXT_CSD_PART_CONFIG_ACC_RPMB)
 779                         mmc_retune_unpause(card->host);
 780         }
 781
 782         main_md->part_curr = md->part_type;
 783         return 0;
 784 }
 785
 786 static u32 mmc_sd_num_wr_blocks(struct mmc_card *card)
 787 {
 788         int err;
 789         u32 result;
 790         __be32 *blocks;
 791
 792         struct mmc_request mrq = {NULL};
 793         struct mmc_command cmd = {0};
 794         struct mmc_data data = {0};
 795
 796         struct scatterlist sg;
 797
 798         cmd.opcode = MMC_APP_CMD;
 799         cmd.arg = card->rca << 16;
 800         cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC;
 801
 802         err = mmc_wait_for_cmd(card->host, &cmd, 0);
 803         if (err)
 804                 return (u32)-1;
 805         if (!mmc_host_is_spi(card->host) && !(cmd.resp[0] & R1_APP_CMD))
 806                 return (u32)-1;
 807
 808         memset(&cmd, 0, sizeof(struct mmc_command));
 809
 810         cmd.opcode = SD_APP_SEND_NUM_WR_BLKS;
 811         cmd.arg = 0;
 812         cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC;
 813
 814         data.blksz = 4;
 815         data.blocks = 1;
 816         data.flags = MMC_DATA_READ;
 817         data.sg = &sg;
 818         data.sg_len = 1;
 819         mmc_set_data_timeout(&data, card);
 820
 821         mrq.cmd = &cmd;
 822         mrq.data = &data;
 823
 824         blocks = kmalloc(4, GFP_KERNEL);
 825         if (!blocks)
 826                 return (u32)-1;
 827
 828         sg_init_one(&sg, blocks, 4);
 829
 830         mmc_wait_for_req(card->host, &mrq);
 831
 832         result = ntohl(*blocks);
 833         kfree(blocks);
 834
 835         if (cmd.error || data.error)
 836                 result = (u32)-1;
 837
 838         return result;
 839 }
 840
 841 static int get_card_status(struct mmc_card *card, u32 *status, int retries)
 842 {
 843         struct mmc_command cmd = {0};
 844         int err;
 845
 846         cmd.opcode = MMC_SEND_STATUS;
 847         if (!mmc_host_is_spi(card->host))
 848                 cmd.arg = card->rca << 16;
 849         cmd.flags = MMC_RSP_SPI_R2 | MMC_RSP_R1 | MMC_CMD_AC;
 850         err = mmc_wait_for_cmd(card->host, &cmd, retries);
 851         if (err == 0)
 852                 *status = cmd.resp[0];
 853         return err;
 854 }
 855
 856 static int card_busy_detect(struct mmc_card *card, unsigned int timeout_ms,
 857                 bool hw_busy_detect, struct request *req, bool *gen_err)
 858 {
 859         unsigned long timeout = jiffies + msecs_to_jiffies(timeout_ms);
 860         int err = 0;
 861         u32 status;
 862
 863         do {
 864                 err = get_card_status(card, &status, 5);
 865                 if (err) {
 866                         pr_err("%s: error %d requesting status\n",
 867                                req->rq_disk->disk_name, err);
 868                         return err;
 869                 }
 870
 871                 if (status & R1_ERROR) {
 872                         pr_err("%s: %s: error sending status cmd, status %#x\n",
 873                                 req->rq_disk->disk_name, __func__, status);
 874                         *gen_err = true;
 875                 }
 876
 877                 /* We may rely on the host hw to handle busy detection.*/
 878                 if ((card->host->caps & MMC_CAP_WAIT_WHILE_BUSY) &&
 879                         hw_busy_detect)
 880                         break;
 881
 882                 /*
 883                  * Timeout if the device never becomes ready for data and never
 884                  * leaves the program state.
 885                  */
 886                 if (time_after(jiffies, timeout)) {
 887                         pr_err("%s: Card stuck in programming state! %s %s\n",
 888                                 mmc_hostname(card->host),
 889                                 req->rq_disk->disk_name, __func__);
 890                         return -ETIMEDOUT;
 891                 }
 892
 893                 /*
 894                  * Some cards mishandle the status bits,
 895                  * so make sure to check both the busy
 896                  * indication and the card state.
 897                  */
 898         } while (!(status & R1_READY_FOR_DATA) ||
 899                  (R1_CURRENT_STATE(status) == R1_STATE_PRG));
 900
 901         return err;
 902 }
 903
 904 static int send_stop(struct mmc_card *card, unsigned int timeout_ms,
 905                 struct request *req, bool *gen_err, u32 *stop_status)
 906 {
 907         struct mmc_host *host = card->host;
 908         struct mmc_command cmd = {0};
 909         int err;
 910         bool use_r1b_resp = rq_data_dir(req) == WRITE;
 911
 912         /*
 913          * Normally we use R1B responses for WRITE, but in cases where the host
 914          * has specified a max_busy_timeout we need to validate it. A failure
 915          * means we need to prevent the host from doing hw busy detection, which
 916          * is done by converting to a R1 response instead.
 917          */
 918         if (host->max_busy_timeout && (timeout_ms > host->max_busy_timeout))
 919                 use_r1b_resp = false;
 920
 921         cmd.opcode = MMC_STOP_TRANSMISSION;
 922         if (use_r1b_resp) {
 923                 cmd.flags = MMC_RSP_SPI_R1B | MMC_RSP_R1B | MMC_CMD_AC;
 924                 cmd.busy_timeout = timeout_ms;
 925         } else {
 926                 cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC;
 927         }
 928
 929         err = mmc_wait_for_cmd(host, &cmd, 5);
 930         if (err)
 931                 return err;
 932
 933         *stop_status = cmd.resp[0];
 934
 935         /* No need to check card status in case of READ. */
 936         if (rq_data_dir(req) == READ)
 937                 return 0;
 938
 939         if (!mmc_host_is_spi(host) &&
 940                 (*stop_status & R1_ERROR)) {
 941                 pr_err("%s: %s: general error sending stop command, resp %#x\n",
 942                         req->rq_disk->disk_name, __func__, *stop_status);
 943                 *gen_err = true;
 944         }
 945
 946         return card_busy_detect(card, timeout_ms, use_r1b_resp, req, gen_err);
 947 }
 948
 949 #define ERR_NOMEDIUM    3
 950 #define ERR_RETRY       2
 951 #define ERR_ABORT       1
 952 #define ERR_CONTINUE    0
 953
 954 static int mmc_blk_cmd_error(struct request *req, const char *name, int error,
 955         bool status_valid, u32 status)
 956 {
 957         switch (error) {
 958         case -EILSEQ:
 959                 /* response crc error, retry the r/w cmd */
 960                 pr_err("%s: %s sending %s command, card status %#x\n",
 961                         req->rq_disk->disk_name, "response CRC error",
 962                         name, status);
 963                 return ERR_RETRY;
 964
 965         case -ETIMEDOUT:
 966                 pr_err("%s: %s sending %s command, card status %#x\n",
 967                         req->rq_disk->disk_name, "timed out", name, status);
 968
 969                 /* If the status cmd initially failed, retry the r/w cmd */
 970                 if (!status_valid) {
 971                         pr_err("%s: status not valid, retrying timeout\n",
 972                                 req->rq_disk->disk_name);
 973                         return ERR_RETRY;
 974                 }
 975
 976                 /*
 977                  * If it was a r/w cmd crc error, or illegal command
 978                  * (eg, issued in wrong state) then retry - we should
 979                  * have corrected the state problem above.
 980                  */
 981                 if (status & (R1_COM_CRC_ERROR | R1_ILLEGAL_COMMAND)) {
 982                         pr_err("%s: command error, retrying timeout\n",
 983                                 req->rq_disk->disk_name);
 984                         return ERR_RETRY;
 985                 }
 986
 987                 /* Otherwise abort the command */
 988                 return ERR_ABORT;
 989
 990         default:
 991                 /* We don't understand the error code the driver gave us */
 992                 pr_err("%s: unknown error %d sending read/write command, card status %#x\n",
 993                        req->rq_disk->disk_name, error, status);
 994                 return ERR_ABORT;
 995         }
 996 }
 997
 998 /*
 999  * Initial r/w and stop cmd error recovery.
1000  * We don't know whether the card received the r/w cmd or not, so try to
1001  * restore things back to a sane state.  Essentially, we do this as follows:
1002  * - Obtain card status.  If the first attempt to obtain card status fails,
1003  *   the status word will reflect the failed status cmd, not the failed
1004  *   r/w cmd.  If we fail to obtain card status, it suggests we can no
1005  *   longer communicate with the card.
1006  * - Check the card state.  If the card received the cmd but there was a
1007  *   transient problem with the response, it might still be in a data transfer
1008  *   mode.  Try to send it a stop command.  If this fails, we can't recover.
1009  * - If the r/w cmd failed due to a response CRC error, it was probably
1010  *   transient, so retry the cmd.
1011  * - If the r/w cmd timed out, but we didn't get the r/w cmd status, retry.
1012  * - If the r/w cmd timed out, and the r/w cmd failed due to CRC error or
1013  *   illegal cmd, retry.
1014  * Otherwise we don't understand what happened, so abort.
1015  */
1016 static int mmc_blk_cmd_recovery(struct mmc_card *card, struct request *req,
1017         struct mmc_blk_request *brq, int *ecc_err, bool *gen_err)
1018 {
1019         bool prev_cmd_status_valid = true;
1020         u32 status, stop_status = 0;
1021         int err, retry;
1022
1023         if (mmc_card_removed(card))
1024                 return ERR_NOMEDIUM;
1025
1026         /*
1027          * Try to get card status which indicates both the card state
1028          * and why there was no response.  If the first attempt fails,
1029          * we can't be sure the returned status is for the r/w command.
1030          */
1031         for (retry = 2; retry >= 0; retry--) {
1032                 err = get_card_status(card, &status, 0);
1033                 if (!err)
1034                         break;
1035
1036                 /* Re-tune if needed */
1037                 mmc_retune_recheck(card->host);
1038
1039                 prev_cmd_status_valid = false;
1040                 pr_err("%s: error %d sending status command, %sing\n",
1041                        req->rq_disk->disk_name, err, retry ? "retry" : "abort");
1042         }
1043
1044         /* We couldn't get a response from the card.  Give up. */
1045         if (err) {
1046                 /* Check if the card is removed */
1047                 if (mmc_detect_card_removed(card->host))
1048                         return ERR_NOMEDIUM;
1049                 return ERR_ABORT;
1050         }
1051
1052         /* Flag ECC errors */
1053         if ((status & R1_CARD_ECC_FAILED) ||
1054             (brq->stop.resp[0] & R1_CARD_ECC_FAILED) ||
1055             (brq->cmd.resp[0] & R1_CARD_ECC_FAILED))
1056                 *ecc_err = 1;
1057
1058         /* Flag General errors */
1059         if (!mmc_host_is_spi(card->host) && rq_data_dir(req) != READ)
1060                 if ((status & R1_ERROR) ||
1061                         (brq->stop.resp[0] & R1_ERROR)) {
1062                         pr_err("%s: %s: general error sending stop or status command, stop cmd response %#x, card status %#x\n",
1063                                req->rq_disk->disk_name, __func__,
1064                                brq->stop.resp[0], status);
1065                         *gen_err = true;
1066                 }
1067
1068         /*
1069          * Check the current card state.  If it is in some data transfer
1070          * mode, tell it to stop (and hopefully transition back to TRAN.)
1071          */
1072         if (R1_CURRENT_STATE(status) == R1_STATE_DATA ||
1073             R1_CURRENT_STATE(status) == R1_STATE_RCV) {
1074                 err = send_stop(card,
1075                         DIV_ROUND_UP(brq->data.timeout_ns, 1000000),
1076                         req, gen_err, &stop_status);
1077                 if (err) {
1078                         pr_err("%s: error %d sending stop command\n",
1079                                req->rq_disk->disk_name, err);
1080                         /*
1081                          * If the stop cmd also timed out, the card is probably
1082                          * not present, so abort. Other errors are bad news too.
1083                          */
1084                         return ERR_ABORT;
1085                 }
1086
1087                 if (stop_status & R1_CARD_ECC_FAILED)
1088                         *ecc_err = 1;
1089         }
1090
1091         /* Check for set block count errors */
1092         if (brq->sbc.error)
1093                 return mmc_blk_cmd_error(req, "SET_BLOCK_COUNT", brq->sbc.error,
1094                                 prev_cmd_status_valid, status);
1095
1096         /* Check for r/w command errors */
1097         if (brq->cmd.error)
1098                 return mmc_blk_cmd_error(req, "r/w cmd", brq->cmd.error,
1099                                 prev_cmd_status_valid, status);
1100
1101         /* Data errors */
1102         if (!brq->stop.error)
1103                 return ERR_CONTINUE;
1104
1105         /* Now for stop errors.  These aren't fatal to the transfer. */
1106         pr_info("%s: error %d sending stop command, original cmd response %#x, card status %#x\n",
1107                req->rq_disk->disk_name, brq->stop.error,
1108                brq->cmd.resp[0], status);
1109
1110         /*
1111          * Subsitute in our own stop status as this will give the error
1112          * state which happened during the execution of the r/w command.
1113          */
1114         if (stop_status) {
1115                 brq->stop.resp[0] = stop_status;
1116                 brq->stop.error = 0;
1117         }
1118         return ERR_CONTINUE;
1119 }
1120
1121 static int mmc_blk_reset(struct mmc_blk_data *md, struct mmc_host *host,
1122                          int type)
1123 {
1124         int err;
1125
1126         if (md->reset_done & type)
1127                 return -EEXIST;
1128
1129         md->reset_done |= type;
1130         err = mmc_hw_reset(host);
1131         /* Ensure we switch back to the correct partition */
1132         if (err != -EOPNOTSUPP) {
1133                 struct mmc_blk_data *main_md =
1134                         dev_get_drvdata(&host->card->dev);
1135                 int part_err;
1136
1137                 main_md->part_curr = main_md->part_type;
1138                 part_err = mmc_blk_part_switch(host->card, md);
1139                 if (part_err) {
1140                         /*
1141                          * We have failed to get back into the correct
1142                          * partition, so we need to abort the whole request.
1143                          */
1144                         return -ENODEV;
1145                 }
1146         }
1147         return err;
1148 }
1149
1150 static inline void mmc_blk_reset_success(struct mmc_blk_data *md, int type)
1151 {
1152         md->reset_done &= ~type;
1153 }
1154
1155 int mmc_access_rpmb(struct mmc_queue *mq)
1156 {
1157         struct mmc_blk_data *md = mq->data;
1158         /*
1159          * If this is a RPMB partition access, return ture
1160          */
1161         if (md && md->part_type == EXT_CSD_PART_CONFIG_ACC_RPMB)
1162                 return true;
1163
1164         return false;
1165 }
1166
1167 static int mmc_blk_issue_discard_rq(struct mmc_queue *mq, struct request *req)
1168 {
1169         struct mmc_blk_data *md = mq->data;
1170         struct mmc_card *card = md->queue.card;
1171         unsigned int from, nr, arg;
1172         int err = 0, type = MMC_BLK_DISCARD;
1173
1174         if (!mmc_can_erase(card)) {
1175                 err = -EOPNOTSUPP;
1176                 goto out;
1177         }
1178
1179         from = blk_rq_pos(req);
1180         nr = blk_rq_sectors(req);
1181
1182         if (mmc_can_discard(card))
1183                 arg = MMC_DISCARD_ARG;
1184         else if (mmc_can_trim(card))
1185                 arg = MMC_TRIM_ARG;
1186         else
1187                 arg = MMC_ERASE_ARG;
1188 retry:
1189         if (card->quirks & MMC_QUIRK_INAND_CMD38) {
1190                 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1191                                  INAND_CMD38_ARG_EXT_CSD,
1192                                  arg == MMC_TRIM_ARG ?
1193                                  INAND_CMD38_ARG_TRIM :
1194                                  INAND_CMD38_ARG_ERASE,
1195                                  0);
1196                 if (err)
1197                         goto out;
1198         }
1199         err = mmc_erase(card, from, nr, arg);
1200 out:
1201         if (err == -EIO && !mmc_blk_reset(md, card->host, type))
1202                 goto retry;
1203         if (!err)
1204                 mmc_blk_reset_success(md, type);
1205         blk_end_request(req, err, blk_rq_bytes(req));
1206
1207         return err ? 0 : 1;
1208 }
1209
1210 static int mmc_blk_issue_secdiscard_rq(struct mmc_queue *mq,
1211                                        struct request *req)
1212 {
1213         struct mmc_blk_data *md = mq->data;
1214         struct mmc_card *card = md->queue.card;
1215         unsigned int from, nr, arg;
1216         int err = 0, type = MMC_BLK_SECDISCARD;
1217
1218         if (!(mmc_can_secure_erase_trim(card))) {
1219                 err = -EOPNOTSUPP;
1220                 goto out;
1221         }
1222
1223         from = blk_rq_pos(req);
1224         nr = blk_rq_sectors(req);
1225
1226         if (mmc_can_trim(card) && !mmc_erase_group_aligned(card, from, nr))
1227                 arg = MMC_SECURE_TRIM1_ARG;
1228         else
1229                 arg = MMC_SECURE_ERASE_ARG;
1230
1231 retry:
1232         if (card->quirks & MMC_QUIRK_INAND_CMD38) {
1233                 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1234                                  INAND_CMD38_ARG_EXT_CSD,
1235                                  arg == MMC_SECURE_TRIM1_ARG ?
1236                                  INAND_CMD38_ARG_SECTRIM1 :
1237                                  INAND_CMD38_ARG_SECERASE,
1238                                  0);
1239                 if (err)
1240                         goto out_retry;
1241         }
1242
1243         err = mmc_erase(card, from, nr, arg);
1244         if (err == -EIO)
1245                 goto out_retry;
1246         if (err)
1247                 goto out;
1248
1249         if (arg == MMC_SECURE_TRIM1_ARG) {
1250                 if (card->quirks & MMC_QUIRK_INAND_CMD38) {
1251                         err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1252                                          INAND_CMD38_ARG_EXT_CSD,
1253                                          INAND_CMD38_ARG_SECTRIM2,
1254                                          0);
1255                         if (err)
1256                                 goto out_retry;
1257                 }
1258
1259                 err = mmc_erase(card, from, nr, MMC_SECURE_TRIM2_ARG);
1260                 if (err == -EIO)
1261                         goto out_retry;
1262                 if (err)
1263                         goto out;
1264         }
1265
1266 out_retry:
1267         if (err && !mmc_blk_reset(md, card->host, type))
1268                 goto retry;
1269         if (!err)
1270                 mmc_blk_reset_success(md, type);
1271 out:
1272         blk_end_request(req, err, blk_rq_bytes(req));
1273
1274         return err ? 0 : 1;
1275 }
1276
1277 static int mmc_blk_issue_flush(struct mmc_queue *mq, struct request *req)
1278 {
1279         struct mmc_blk_data *md = mq->data;
1280         struct mmc_card *card = md->queue.card;
1281         int ret = 0;
1282
1283         ret = mmc_flush_cache(card);
1284         if (ret)
1285                 ret = -EIO;
1286
1287         blk_end_request_all(req, ret);
1288
1289         return ret ? 0 : 1;
1290 }
1291
1292 /*
1293  * Reformat current write as a reliable write, supporting
1294  * both legacy and the enhanced reliable write MMC cards.
1295  * In each transfer we'll handle only as much as a single
1296  * reliable write can handle, thus finish the request in
1297  * partial completions.
1298  */
1299 static inline void mmc_apply_rel_rw(struct mmc_blk_request *brq,
1300                                     struct mmc_card *card,
1301                                     struct request *req)
1302 {
1303         if (!(card->ext_csd.rel_param & EXT_CSD_WR_REL_PARAM_EN)) {
1304                 /* Legacy mode imposes restrictions on transfers. */
1305                 if (!IS_ALIGNED(brq->cmd.arg, card->ext_csd.rel_sectors))
1306                         brq->data.blocks = 1;
1307
1308                 if (brq->data.blocks > card->ext_csd.rel_sectors)
1309                         brq->data.blocks = card->ext_csd.rel_sectors;
1310                 else if (brq->data.blocks < card->ext_csd.rel_sectors)
1311                         brq->data.blocks = 1;
1312         }
1313 }
1314
1315 #define CMD_ERRORS                                                      \
1316         (R1_OUT_OF_RANGE |      /* Command argument out of range */     \
1317          R1_ADDRESS_ERROR |     /* Misaligned address */                \
1318          R1_BLOCK_LEN_ERROR |   /* Transferred block length incorrect */\
1319          R1_WP_VIOLATION |      /* Tried to write to protected block */ \
1320          R1_CC_ERROR |          /* Card controller error */             \
1321          R1_ERROR)              /* General/unknown error */
1322
1323 static int mmc_blk_err_check(struct mmc_card *card,
1324                              struct mmc_async_req *areq)
1325 {
1326         struct mmc_queue_req *mq_mrq = container_of(areq, struct mmc_queue_req,
1327                                                     mmc_active);
1328         struct mmc_blk_request *brq = &mq_mrq->brq;
1329         struct request *req = mq_mrq->req;
1330         int need_retune = card->host->need_retune;
1331         int ecc_err = 0;
1332         bool gen_err = false;
1333
1334         /*
1335          * sbc.error indicates a problem with the set block count
1336          * command.  No data will have been transferred.
1337          *
1338          * cmd.error indicates a problem with the r/w command.  No
1339          * data will have been transferred.
1340          *
1341          * stop.error indicates a problem with the stop command.  Data
1342          * may have been transferred, or may still be transferring.
1343          */
1344         if (brq->sbc.error || brq->cmd.error || brq->stop.error ||
1345             brq->data.error) {
1346                 switch (mmc_blk_cmd_recovery(card, req, brq, &ecc_err, &gen_err)) {
1347                 case ERR_RETRY:
1348                         return MMC_BLK_RETRY;
1349                 case ERR_ABORT:
1350                         return MMC_BLK_ABORT;
1351                 case ERR_NOMEDIUM:
1352                         return MMC_BLK_NOMEDIUM;
1353                 case ERR_CONTINUE:
1354                         break;
1355                 }
1356         }
1357
1358         /*
1359          * Check for errors relating to the execution of the
1360          * initial command - such as address errors.  No data
1361          * has been transferred.
1362          */
1363         if (brq->cmd.resp[0] & CMD_ERRORS) {
1364                 pr_err("%s: r/w command failed, status = %#x\n",
1365                        req->rq_disk->disk_name, brq->cmd.resp[0]);
1366                 return MMC_BLK_ABORT;
1367         }
1368
1369         /*
1370          * Everything else is either success, or a data error of some
1371          * kind.  If it was a write, we may have transitioned to
1372          * program mode, which we have to wait for it to complete.
1373          */
1374         if (!mmc_host_is_spi(card->host) && rq_data_dir(req) != READ) {
1375                 int err;
1376
1377                 /* Check stop command response */
1378                 if (brq->stop.resp[0] & R1_ERROR) {
1379                         pr_err("%s: %s: general error sending stop command, stop cmd response %#x\n",
1380                                req->rq_disk->disk_name, __func__,
1381                                brq->stop.resp[0]);
1382                         gen_err = true;
1383                 }
1384
1385                 err = card_busy_detect(card, MMC_BLK_TIMEOUT_MS, false, req,
1386                                         &gen_err);
1387                 if (err)
1388                         return MMC_BLK_CMD_ERR;
1389         }
1390
1391         /* if general error occurs, retry the write operation. */
1392         if (gen_err) {
1393                 pr_warn("%s: retrying write for general error\n",
1394                                 req->rq_disk->disk_name);
1395                 return MMC_BLK_RETRY;
1396         }
1397
1398         if (brq->data.error) {
1399                 if (need_retune && !brq->retune_retry_done) {
1400                         pr_debug("%s: retrying because a re-tune was needed\n",
1401                                  req->rq_disk->disk_name);
1402                         brq->retune_retry_done = 1;
1403                         return MMC_BLK_RETRY;
1404                 }
1405                 pr_err("%s: error %d transferring data, sector %u, nr %u, cmd response %#x, card status %#x\n",
1406                        req->rq_disk->disk_name, brq->data.error,
1407                        (unsigned)blk_rq_pos(req),
1408                        (unsigned)blk_rq_sectors(req),
1409                        brq->cmd.resp[0], brq->stop.resp[0]);
1410
1411                 if (rq_data_dir(req) == READ) {
1412                         if (ecc_err)
1413                                 return MMC_BLK_ECC_ERR;
1414                         return MMC_BLK_DATA_ERR;
1415                 } else {
1416                         return MMC_BLK_CMD_ERR;
1417                 }
1418         }
1419
1420         if (!brq->data.bytes_xfered)
1421                 return MMC_BLK_RETRY;
1422
1423         if (mmc_packed_cmd(mq_mrq->cmd_type)) {
1424                 if (unlikely(brq->data.blocks << 9 != brq->data.bytes_xfered))
1425                         return MMC_BLK_PARTIAL;
1426                 else
1427                         return MMC_BLK_SUCCESS;
1428         }
1429
1430         if (blk_rq_bytes(req) != brq->data.bytes_xfered)
1431                 return MMC_BLK_PARTIAL;
1432
1433         return MMC_BLK_SUCCESS;
1434 }
1435
1436 static int mmc_blk_packed_err_check(struct mmc_card *card,
1437                                     struct mmc_async_req *areq)
1438 {
1439         struct mmc_queue_req *mq_rq = container_of(areq, struct mmc_queue_req,
1440                         mmc_active);
1441         struct request *req = mq_rq->req;
1442         struct mmc_packed *packed = mq_rq->packed;
1443         int err, check, status;
1444         u8 *ext_csd;
1445
1446         packed->retries--;
1447         check = mmc_blk_err_check(card, areq);
1448         err = get_card_status(card, &status, 0);
1449         if (err) {
1450                 pr_err("%s: error %d sending status command\n",
1451                        req->rq_disk->disk_name, err);
1452                 return MMC_BLK_ABORT;
1453         }
1454
1455         if (status & R1_EXCEPTION_EVENT) {
1456                 err = mmc_get_ext_csd(card, &ext_csd);
1457                 if (err) {
1458                         pr_err("%s: error %d sending ext_csd\n",
1459                                req->rq_disk->disk_name, err);
1460                         return MMC_BLK_ABORT;
1461                 }
1462
1463                 if ((ext_csd[EXT_CSD_EXP_EVENTS_STATUS] &
1464                      EXT_CSD_PACKED_FAILURE) &&
1465                     (ext_csd[EXT_CSD_PACKED_CMD_STATUS] &
1466                      EXT_CSD_PACKED_GENERIC_ERROR)) {
1467                         if (ext_csd[EXT_CSD_PACKED_CMD_STATUS] &
1468                             EXT_CSD_PACKED_INDEXED_ERROR) {
1469                                 packed->idx_failure =
1470                                   ext_csd[EXT_CSD_PACKED_FAILURE_INDEX] - 1;
1471                                 check = MMC_BLK_PARTIAL;
1472                         }
1473                         pr_err("%s: packed cmd failed, nr %u, sectors %u, "
1474                                "failure index: %d\n",
1475                                req->rq_disk->disk_name, packed->nr_entries,
1476                                packed->blocks, packed->idx_failure);
1477                 }
1478                 kfree(ext_csd);
1479         }
1480
1481         return check;
1482 }
1483
1484 static void mmc_blk_rw_rq_prep(struct mmc_queue_req *mqrq,
1485                                struct mmc_card *card,
1486                                int disable_multi,
1487                                struct mmc_queue *mq)
1488 {
1489         u32 readcmd, writecmd;
1490         struct mmc_blk_request *brq = &mqrq->brq;
1491         struct request *req = mqrq->req;
1492         struct mmc_blk_data *md = mq->data;
1493         bool do_data_tag;
1494
1495         /*
1496          * Reliable writes are used to implement Forced Unit Access and
1497          * are supported only on MMCs.
1498          */
1499         bool do_rel_wr = (req->cmd_flags & REQ_FUA) &&
1500                 (rq_data_dir(req) == WRITE) &&
1501                 (md->flags & MMC_BLK_REL_WR);
1502
1503         memset(brq, 0, sizeof(struct mmc_blk_request));
1504         brq->mrq.cmd = &brq->cmd;
1505         brq->mrq.data = &brq->data;
1506
1507         brq->cmd.arg = blk_rq_pos(req);
1508         if (!mmc_card_blockaddr(card))
1509                 brq->cmd.arg <<= 9;
1510         brq->cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC;
1511         brq->data.blksz = 512;
1512         brq->stop.opcode = MMC_STOP_TRANSMISSION;
1513         brq->stop.arg = 0;
1514         brq->data.blocks = blk_rq_sectors(req);
1515
1516         /*
1517          * The block layer doesn't support all sector count
1518          * restrictions, so we need to be prepared for too big
1519          * requests.
1520          */
1521         if (brq->data.blocks > card->host->max_blk_count)
1522                 brq->data.blocks = card->host->max_blk_count;
1523
1524         if (brq->data.blocks > 1) {
1525                 /*
1526                  * After a read error, we redo the request one sector
1527                  * at a time in order to accurately determine which
1528                  * sectors can be read successfully.
1529                  */
1530                 if (disable_multi)
1531                         brq->data.blocks = 1;
1532
1533                 /*
1534                  * Some controllers have HW issues while operating
1535                  * in multiple I/O mode
1536                  */
1537                 if (card->host->ops->multi_io_quirk)
1538                         brq->data.blocks = card->host->ops->multi_io_quirk(card,
1539                                                 (rq_data_dir(req) == READ) ?
1540                                                 MMC_DATA_READ : MMC_DATA_WRITE,
1541                                                 brq->data.blocks);
1542         }
1543
1544         if (brq->data.blocks > 1 || do_rel_wr) {
1545                 /* SPI multiblock writes terminate using a special
1546                  * token, not a STOP_TRANSMISSION request.
1547                  */
1548                 if (!mmc_host_is_spi(card->host) ||
1549                     rq_data_dir(req) == READ)
1550                         brq->mrq.stop = &brq->stop;
1551                 readcmd = MMC_READ_MULTIPLE_BLOCK;
1552                 writecmd = MMC_WRITE_MULTIPLE_BLOCK;
1553         } else {
1554                 brq->mrq.stop = NULL;
1555                 readcmd = MMC_READ_SINGLE_BLOCK;
1556                 writecmd = MMC_WRITE_BLOCK;
1557         }
1558         if (rq_data_dir(req) == READ) {
1559                 brq->cmd.opcode = readcmd;
1560                 brq->data.flags = MMC_DATA_READ;
1561                 if (brq->mrq.stop)
1562                         brq->stop.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 |
1563                                         MMC_CMD_AC;
1564         } else {
1565                 brq->cmd.opcode = writecmd;
1566                 brq->data.flags = MMC_DATA_WRITE;
1567                 if (brq->mrq.stop)
1568                         brq->stop.flags = MMC_RSP_SPI_R1B | MMC_RSP_R1B |
1569                                         MMC_CMD_AC;
1570         }
1571
1572         if (do_rel_wr)
1573                 mmc_apply_rel_rw(brq, card, req);
1574
1575         /*
1576          * Data tag is used only during writing meta data to speed
1577          * up write and any subsequent read of this meta data
1578          */
1579         do_data_tag = (card->ext_csd.data_tag_unit_size) &&
1580                 (req->cmd_flags & REQ_META) &&
1581                 (rq_data_dir(req) == WRITE) &&
1582                 ((brq->data.blocks * brq->data.blksz) >=
1583                  card->ext_csd.data_tag_unit_size);
1584
1585         /*
1586          * Pre-defined multi-block transfers are preferable to
1587          * open ended-ones (and necessary for reliable writes).
1588          * However, it is not sufficient to just send CMD23,
1589          * and avoid the final CMD12, as on an error condition
1590          * CMD12 (stop) needs to be sent anyway. This, coupled
1591          * with Auto-CMD23 enhancements provided by some
1592          * hosts, means that the complexity of dealing
1593          * with this is best left to the host. If CMD23 is
1594          * supported by card and host, we'll fill sbc in and let
1595          * the host deal with handling it correctly. This means
1596          * that for hosts that don't expose MMC_CAP_CMD23, no
1597          * change of behavior will be observed.
1598          *
1599          * N.B: Some MMC cards experience perf degradation.
1600          * We'll avoid using CMD23-bounded multiblock writes for
1601          * these, while retaining features like reliable writes.
1602          */
1603         if ((md->flags & MMC_BLK_CMD23) && mmc_op_multi(brq->cmd.opcode) &&
1604             (do_rel_wr || !(card->quirks & MMC_QUIRK_BLK_NO_CMD23) ||
1605              do_data_tag)) {
1606                 brq->sbc.opcode = MMC_SET_BLOCK_COUNT;
1607                 brq->sbc.arg = brq->data.blocks |
1608                         (do_rel_wr ? (1 << 31) : 0) |
1609                         (do_data_tag ? (1 << 29) : 0);
1610                 brq->sbc.flags = MMC_RSP_R1 | MMC_CMD_AC;
1611                 brq->mrq.sbc = &brq->sbc;
1612         }
1613
1614         mmc_set_data_timeout(&brq->data, card);
1615
1616         brq->data.sg = mqrq->sg;
1617         brq->data.sg_len = mmc_queue_map_sg(mq, mqrq);
1618
1619         /*
1620          * Adjust the sg list so it is the same size as the
1621          * request.
1622          */
1623         if (brq->data.blocks != blk_rq_sectors(req)) {
1624                 int i, data_size = brq->data.blocks << 9;
1625                 struct scatterlist *sg;
1626
1627                 for_each_sg(brq->data.sg, sg, brq->data.sg_len, i) {
1628                         data_size -= sg->length;
1629                         if (data_size <= 0) {
1630                                 sg->length += data_size;
1631                                 i++;
1632                                 break;
1633                         }
1634                 }
1635                 brq->data.sg_len = i;
1636         }
1637
1638         mqrq->mmc_active.mrq = &brq->mrq;
1639         mqrq->mmc_active.err_check = mmc_blk_err_check;
1640
1641         mmc_queue_bounce_pre(mqrq);
1642 }
1643
1644 static inline u8 mmc_calc_packed_hdr_segs(struct request_queue *q,
1645                                           struct mmc_card *card)
1646 {
1647         unsigned int hdr_sz = mmc_large_sector(card) ? 4096 : 512;
1648         unsigned int max_seg_sz = queue_max_segment_size(q);
1649         unsigned int len, nr_segs = 0;
1650
1651         do {
1652                 len = min(hdr_sz, max_seg_sz);
1653                 hdr_sz -= len;
1654                 nr_segs++;
1655         } while (hdr_sz);
1656
1657         return nr_segs;
1658 }
1659
1660 static u8 mmc_blk_prep_packed_list(struct mmc_queue *mq, struct request *req)
1661 {
1662         struct request_queue *q = mq->queue;
1663         struct mmc_card *card = mq->card;
1664         struct request *cur = req, *next = NULL;
1665         struct mmc_blk_data *md = mq->data;
1666         struct mmc_queue_req *mqrq = mq->mqrq_cur;
1667         bool en_rel_wr = card->ext_csd.rel_param & EXT_CSD_WR_REL_PARAM_EN;
1668         unsigned int req_sectors = 0, phys_segments = 0;
1669         unsigned int max_blk_count, max_phys_segs;
1670         bool put_back = true;
1671         u8 max_packed_rw = 0;
1672         u8 reqs = 0;
1673
1674         /*
1675          * We don't need to check packed for any further
1676          * operation of packed stuff as we set MMC_PACKED_NONE
1677          * and return zero for reqs if geting null packed. Also
1678          * we clean the flag of MMC_BLK_PACKED_CMD to avoid doing
1679          * it again when removing blk req.
1680          */
1681         if (!mqrq->packed) {
1682                 md->flags &= (~MMC_BLK_PACKED_CMD);
1683                 goto no_packed;
1684         }
1685
1686         if (!(md->flags & MMC_BLK_PACKED_CMD))
1687                 goto no_packed;
1688
1689         if ((rq_data_dir(cur) == WRITE) &&
1690             mmc_host_packed_wr(card->host))
1691                 max_packed_rw = card->ext_csd.max_packed_writes;
1692
1693         if (max_packed_rw == 0)
1694                 goto no_packed;
1695
1696         if (mmc_req_rel_wr(cur) &&
1697             (md->flags & MMC_BLK_REL_WR) && !en_rel_wr)
1698                 goto no_packed;
1699
1700         if (mmc_large_sector(card) &&
1701             !IS_ALIGNED(blk_rq_sectors(cur), 8))
1702                 goto no_packed;
1703
1704         mmc_blk_clear_packed(mqrq);
1705
1706         max_blk_count = min(card->host->max_blk_count,
1707                             card->host->max_req_size >> 9);
1708         if (unlikely(max_blk_count > 0xffff))
1709                 max_blk_count = 0xffff;
1710
1711         max_phys_segs = queue_max_segments(q);
1712         req_sectors += blk_rq_sectors(cur);
1713         phys_segments += cur->nr_phys_segments;
1714
1715         if (rq_data_dir(cur) == WRITE) {
1716                 req_sectors += mmc_large_sector(card) ? 8 : 1;
1717                 phys_segments += mmc_calc_packed_hdr_segs(q, card);
1718         }
1719
1720         do {
1721                 if (reqs >= max_packed_rw - 1) {
1722                         put_back = false;
1723                         break;
1724                 }
1725
1726                 spin_lock_irq(q->queue_lock);
1727                 next = blk_fetch_request(q);
1728                 spin_unlock_irq(q->queue_lock);
1729                 if (!next) {
1730                         put_back = false;
1731                         break;
1732                 }
1733
1734                 if (mmc_large_sector(card) &&
1735                     !IS_ALIGNED(blk_rq_sectors(next), 8))
1736                         break;
1737
1738                 if (req_op(next) == REQ_OP_DISCARD ||
1739                     req_op(next) == REQ_OP_SECURE_ERASE ||
1740                     req_op(next) == REQ_OP_FLUSH)
1741                         break;
1742
1743                 if (rq_data_dir(cur) != rq_data_dir(next))
1744                         break;
1745
1746                 if (mmc_req_rel_wr(next) &&
1747                     (md->flags & MMC_BLK_REL_WR) && !en_rel_wr)
1748                         break;
1749
1750                 req_sectors += blk_rq_sectors(next);
1751                 if (req_sectors > max_blk_count)
1752                         break;
1753
1754                 phys_segments +=  next->nr_phys_segments;
1755                 if (phys_segments > max_phys_segs)
1756                         break;
1757
1758                 list_add_tail(&next->queuelist, &mqrq->packed->list);
1759                 cur = next;
1760                 reqs++;
1761         } while (1);
1762
1763         if (put_back) {
1764                 spin_lock_irq(q->queue_lock);
1765                 blk_requeue_request(q, next);
1766                 spin_unlock_irq(q->queue_lock);
1767         }
1768
1769         if (reqs > 0) {
1770                 list_add(&req->queuelist, &mqrq->packed->list);
1771                 mqrq->packed->nr_entries = ++reqs;
1772                 mqrq->packed->retries = reqs;
1773                 return reqs;
1774         }
1775
1776 no_packed:
1777         mqrq->cmd_type = MMC_PACKED_NONE;
1778         return 0;
1779 }
1780
1781 static void mmc_blk_packed_hdr_wrq_prep(struct mmc_queue_req *mqrq,
1782                                         struct mmc_card *card,
1783                                         struct mmc_queue *mq)
1784 {
1785         struct mmc_blk_request *brq = &mqrq->brq;
1786         struct request *req = mqrq->req;
1787         struct request *prq;
1788         struct mmc_blk_data *md = mq->data;
1789         struct mmc_packed *packed = mqrq->packed;
1790         bool do_rel_wr, do_data_tag;
1791         __le32 *packed_cmd_hdr;
1792         u8 hdr_blocks;
1793         u8 i = 1;
1794
1795         mqrq->cmd_type = MMC_PACKED_WRITE;
1796         packed->blocks = 0;
1797         packed->idx_failure = MMC_PACKED_NR_IDX;
1798
1799         packed_cmd_hdr = packed->cmd_hdr;
1800         memset(packed_cmd_hdr, 0, sizeof(packed->cmd_hdr));
1801         packed_cmd_hdr[0] = cpu_to_le32((packed->nr_entries << 16) |
1802                 (PACKED_CMD_WR << 8) | PACKED_CMD_VER);
1803         hdr_blocks = mmc_large_sector(card) ? 8 : 1;
1804
1805         /*
1806          * Argument for each entry of packed group
1807          */
1808         list_for_each_entry(prq, &packed->list, queuelist) {
1809                 do_rel_wr = mmc_req_rel_wr(prq) && (md->flags & MMC_BLK_REL_WR);
1810                 do_data_tag = (card->ext_csd.data_tag_unit_size) &&
1811                         (prq->cmd_flags & REQ_META) &&
1812                         (rq_data_dir(prq) == WRITE) &&
1813                         blk_rq_bytes(prq) >= card->ext_csd.data_tag_unit_size;
1814                 /* Argument of CMD23 */
1815                 packed_cmd_hdr[(i * 2)] = cpu_to_le32(
1816                         (do_rel_wr ? MMC_CMD23_ARG_REL_WR : 0) |
1817                         (do_data_tag ? MMC_CMD23_ARG_TAG_REQ : 0) |
1818                         blk_rq_sectors(prq));
1819                 /* Argument of CMD18 or CMD25 */
1820                 packed_cmd_hdr[((i * 2)) + 1] = cpu_to_le32(
1821                         mmc_card_blockaddr(card) ?
1822                         blk_rq_pos(prq) : blk_rq_pos(prq) << 9);
1823                 packed->blocks += blk_rq_sectors(prq);
1824                 i++;
1825         }
1826
1827         memset(brq, 0, sizeof(struct mmc_blk_request));
1828         brq->mrq.cmd = &brq->cmd;
1829         brq->mrq.data = &brq->data;
1830         brq->mrq.sbc = &brq->sbc;
1831         brq->mrq.stop = &brq->stop;
1832
1833         brq->sbc.opcode = MMC_SET_BLOCK_COUNT;
1834         brq->sbc.arg = MMC_CMD23_ARG_PACKED | (packed->blocks + hdr_blocks);
1835         brq->sbc.flags = MMC_RSP_R1 | MMC_CMD_AC;
1836
1837         brq->cmd.opcode = MMC_WRITE_MULTIPLE_BLOCK;
1838         brq->cmd.arg = blk_rq_pos(req);
1839         if (!mmc_card_blockaddr(card))
1840                 brq->cmd.arg <<= 9;
1841         brq->cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC;
1842
1843         brq->data.blksz = 512;
1844         brq->data.blocks = packed->blocks + hdr_blocks;
1845         brq->data.flags = MMC_DATA_WRITE;
1846
1847         brq->stop.opcode = MMC_STOP_TRANSMISSION;
1848         brq->stop.arg = 0;
1849         brq->stop.flags = MMC_RSP_SPI_R1B | MMC_RSP_R1B | MMC_CMD_AC;
1850
1851         mmc_set_data_timeout(&brq->data, card);
1852
1853         brq->data.sg = mqrq->sg;
1854         brq->data.sg_len = mmc_queue_map_sg(mq, mqrq);
1855
1856         mqrq->mmc_active.mrq = &brq->mrq;
1857         mqrq->mmc_active.err_check = mmc_blk_packed_err_check;
1858
1859         mmc_queue_bounce_pre(mqrq);
1860 }
1861
1862 static int mmc_blk_cmd_err(struct mmc_blk_data *md, struct mmc_card *card,
1863                            struct mmc_blk_request *brq, struct request *req,
1864                            int ret)
1865 {
1866         struct mmc_queue_req *mq_rq;
1867         mq_rq = container_of(brq, struct mmc_queue_req, brq);
1868
1869         /*
1870          * If this is an SD card and we're writing, we can first
1871          * mark the known good sectors as ok.
1872          *
1873          * If the card is not SD, we can still ok written sectors
1874          * as reported by the controller (which might be less than
1875          * the real number of written sectors, but never more).
1876          */
1877         if (mmc_card_sd(card)) {
1878                 u32 blocks;
1879
1880                 blocks = mmc_sd_num_wr_blocks(card);
1881                 if (blocks != (u32)-1) {
1882                         ret = blk_end_request(req, 0, blocks << 9);
1883                 }
1884         } else {
1885                 if (!mmc_packed_cmd(mq_rq->cmd_type))
1886                         ret = blk_end_request(req, 0, brq->data.bytes_xfered);
1887         }
1888         return ret;
1889 }
1890
1891 static int mmc_blk_end_packed_req(struct mmc_queue_req *mq_rq)
1892 {
1893         struct request *prq;
1894         struct mmc_packed *packed = mq_rq->packed;
1895         int idx = packed->idx_failure, i = 0;
1896         int ret = 0;
1897
1898         while (!list_empty(&packed->list)) {
1899                 prq = list_entry_rq(packed->list.next);
1900                 if (idx == i) {
1901                         /* retry from error index */
1902                         packed->nr_entries -= idx;
1903                         mq_rq->req = prq;
1904                         ret = 1;
1905
1906                         if (packed->nr_entries == MMC_PACKED_NR_SINGLE) {
1907                                 list_del_init(&prq->queuelist);
1908                                 mmc_blk_clear_packed(mq_rq);
1909                         }
1910                         return ret;
1911                 }
1912                 list_del_init(&prq->queuelist);
1913                 blk_end_request(prq, 0, blk_rq_bytes(prq));
1914                 i++;
1915         }
1916
1917         mmc_blk_clear_packed(mq_rq);
1918         return ret;
1919 }
1920
1921 static void mmc_blk_abort_packed_req(struct mmc_queue_req *mq_rq)
1922 {
1923         struct request *prq;
1924         struct mmc_packed *packed = mq_rq->packed;
1925
1926         while (!list_empty(&packed->list)) {
1927                 prq = list_entry_rq(packed->list.next);
1928                 list_del_init(&prq->queuelist);
1929                 blk_end_request(prq, -EIO, blk_rq_bytes(prq));
1930         }
1931
1932         mmc_blk_clear_packed(mq_rq);
1933 }
1934
1935 static void mmc_blk_revert_packed_req(struct mmc_queue *mq,
1936                                       struct mmc_queue_req *mq_rq)
1937 {
1938         struct request *prq;
1939         struct request_queue *q = mq->queue;
1940         struct mmc_packed *packed = mq_rq->packed;
1941
1942         while (!list_empty(&packed->list)) {
1943                 prq = list_entry_rq(packed->list.prev);
1944                 if (prq->queuelist.prev != &packed->list) {
1945                         list_del_init(&prq->queuelist);
1946                         spin_lock_irq(q->queue_lock);
1947                         blk_requeue_request(mq->queue, prq);
1948                         spin_unlock_irq(q->queue_lock);
1949                 } else {
1950                         list_del_init(&prq->queuelist);
1951                 }
1952         }
1953
1954         mmc_blk_clear_packed(mq_rq);
1955 }
1956
1957 static int mmc_blk_issue_rw_rq(struct mmc_queue *mq, struct request *rqc)
1958 {
1959         struct mmc_blk_data *md = mq->data;
1960         struct mmc_card *card = md->queue.card;
1961         struct mmc_blk_request *brq = &mq->mqrq_cur->brq;
1962         int ret = 1, disable_multi = 0, retry = 0, type, retune_retry_done = 0;
1963         enum mmc_blk_status status;
1964         struct mmc_queue_req *mq_rq;
1965         struct request *req = rqc;
1966         struct mmc_async_req *areq;
1967         const u8 packed_nr = 2;
1968         u8 reqs = 0;
1969
1970         if (!rqc && !mq->mqrq_prev->req)
1971                 return 0;
1972
1973         if (rqc)
1974                 reqs = mmc_blk_prep_packed_list(mq, rqc);
1975
1976         do {
1977                 if (rqc) {
1978                         /*
1979                          * When 4KB native sector is enabled, only 8 blocks
1980                          * multiple read or write is allowed
1981                          */
1982                         if (mmc_large_sector(card) &&
1983                                 !IS_ALIGNED(blk_rq_sectors(rqc), 8)) {
1984                                 pr_err("%s: Transfer size is not 4KB sector size aligned\n",
1985                                         req->rq_disk->disk_name);
1986                                 mq_rq = mq->mqrq_cur;
1987                                 goto cmd_abort;
1988                         }
1989
1990                         if (reqs >= packed_nr)
1991                                 mmc_blk_packed_hdr_wrq_prep(mq->mqrq_cur,
1992                                                             card, mq);
1993                         else
1994                                 mmc_blk_rw_rq_prep(mq->mqrq_cur, card, 0, mq);
1995                         areq = &mq->mqrq_cur->mmc_active;
1996                 } else
1997                         areq = NULL;
1998                 areq = mmc_start_req(card->host, areq, (int *) &status);
1999                 if (!areq) {
2000                         if (status == MMC_BLK_NEW_REQUEST)
2001                                 mq->flags |= MMC_QUEUE_NEW_REQUEST;
2002                         return 0;
2003                 }
2004
2005                 mq_rq = container_of(areq, struct mmc_queue_req, mmc_active);
2006                 brq = &mq_rq->brq;
2007                 req = mq_rq->req;
2008                 type = rq_data_dir(req) == READ ? MMC_BLK_READ : MMC_BLK_WRITE;
2009                 mmc_queue_bounce_post(mq_rq);
2010
2011                 switch (status) {
2012                 case MMC_BLK_SUCCESS:
2013                 case MMC_BLK_PARTIAL:
2014                         /*
2015                          * A block was successfully transferred.
2016                          */
2017                         mmc_blk_reset_success(md, type);
2018
2019                         if (mmc_packed_cmd(mq_rq->cmd_type)) {
2020                                 ret = mmc_blk_end_packed_req(mq_rq);
2021                                 break;
2022                         } else {
2023                                 ret = blk_end_request(req, 0,
2024                                                 brq->data.bytes_xfered);
2025                         }
2026
2027                         /*
2028                          * If the blk_end_request function returns non-zero even
2029                          * though all data has been transferred and no errors
2030                          * were returned by the host controller, it's a bug.
2031                          */
2032                         if (status == MMC_BLK_SUCCESS && ret) {
2033                                 pr_err("%s BUG rq_tot %d d_xfer %d\n",
2034                                        __func__, blk_rq_bytes(req),
2035                                        brq->data.bytes_xfered);
2036                                 rqc = NULL;
2037                                 goto cmd_abort;
2038                         }
2039                         break;
2040                 case MMC_BLK_CMD_ERR:
2041                         ret = mmc_blk_cmd_err(md, card, brq, req, ret);
2042                         if (mmc_blk_reset(md, card->host, type))
2043                                 goto cmd_abort;
2044                         if (!ret)
2045                                 goto start_new_req;
2046                         break;
2047                 case MMC_BLK_RETRY:
2048                         retune_retry_done = brq->retune_retry_done;
2049                         if (retry++ < 5)
2050                                 break;
2051                         /* Fall through */
2052                 case MMC_BLK_ABORT:
2053                         if (!mmc_blk_reset(md, card->host, type))
2054                                 break;
2055                         goto cmd_abort;
2056                 case MMC_BLK_DATA_ERR: {
2057                         int err;
2058
2059                         err = mmc_blk_reset(md, card->host, type);
2060                         if (!err)
2061                                 break;
2062                         if (err == -ENODEV ||
2063                                 mmc_packed_cmd(mq_rq->cmd_type))
2064                                 goto cmd_abort;
2065                         /* Fall through */
2066                 }
2067                 case MMC_BLK_ECC_ERR:
2068                         if (brq->data.blocks > 1) {
2069                                 /* Redo read one sector at a time */
2070                                 pr_warn("%s: retrying using single block read\n",
2071                                         req->rq_disk->disk_name);
2072                                 disable_multi = 1;
2073                                 break;
2074                         }
2075                         /*
2076                          * After an error, we redo I/O one sector at a
2077                          * time, so we only reach here after trying to
2078                          * read a single sector.
2079                          */
2080                         ret = blk_end_request(req, -EIO,
2081                                                 brq->data.blksz);
2082                         if (!ret)
2083                                 goto start_new_req;
2084                         break;
2085                 case MMC_BLK_NOMEDIUM:
2086                         goto cmd_abort;
2087                 default:
2088                         pr_err("%s: Unhandled return value (%d)",
2089                                         req->rq_disk->disk_name, status);
2090                         goto cmd_abort;
2091                 }
2092
2093                 if (ret) {
2094                         if (mmc_packed_cmd(mq_rq->cmd_type)) {
2095                                 if (!mq_rq->packed->retries)
2096                                         goto cmd_abort;
2097                                 mmc_blk_packed_hdr_wrq_prep(mq_rq, card, mq);
2098                                 mmc_start_req(card->host,
2099                                               &mq_rq->mmc_active, NULL);
2100                         } else {
2101
2102                                 /*
2103                                  * In case of a incomplete request
2104                                  * prepare it again and resend.
2105                                  */
2106                                 mmc_blk_rw_rq_prep(mq_rq, card,
2107                                                 disable_multi, mq);
2108                                 mmc_start_req(card->host,
2109                                                 &mq_rq->mmc_active, NULL);
2110                         }
2111                         mq_rq->brq.retune_retry_done = retune_retry_done;
2112                 }
2113         } while (ret);
2114
2115         return 1;
2116
2117  cmd_abort:
2118         if (mmc_packed_cmd(mq_rq->cmd_type)) {
2119                 mmc_blk_abort_packed_req(mq_rq);
2120         } else {
2121                 if (mmc_card_removed(card))
2122                         req->cmd_flags |= REQ_QUIET;
2123                 while (ret)
2124                         ret = blk_end_request(req, -EIO,
2125                                         blk_rq_cur_bytes(req));
2126         }
2127
2128  start_new_req:
2129         if (rqc) {
2130                 if (mmc_card_removed(card)) {
2131                         rqc->cmd_flags |= REQ_QUIET;
2132                         blk_end_request_all(rqc, -EIO);
2133                 } else {
2134                         /*
2135                          * If current request is packed, it needs to put back.
2136                          */
2137                         if (mmc_packed_cmd(mq->mqrq_cur->cmd_type))
2138                                 mmc_blk_revert_packed_req(mq, mq->mqrq_cur);
2139
2140                         mmc_blk_rw_rq_prep(mq->mqrq_cur, card, 0, mq);
2141                         mmc_start_req(card->host,
2142                                       &mq->mqrq_cur->mmc_active, NULL);
2143                 }
2144         }
2145
2146         return 0;
2147 }
2148
2149 int mmc_blk_issue_rq(struct mmc_queue *mq, struct request *req)
2150 {
2151         int ret;
2152         struct mmc_blk_data *md = mq->data;
2153         struct mmc_card *card = md->queue.card;
2154         struct mmc_host *host = card->host;
2155         unsigned long flags;
2156         bool req_is_special = mmc_req_is_special(req);
2157
2158         if (req && !mq->mqrq_prev->req)
2159                 /* claim host only for the first request */
2160                 mmc_get_card(card);
2161
2162         ret = mmc_blk_part_switch(card, md);
2163         if (ret) {
2164                 if (req) {
2165                         blk_end_request_all(req, -EIO);
2166                 }
2167                 ret = 0;
2168                 goto out;
2169         }
2170
2171         mq->flags &= ~MMC_QUEUE_NEW_REQUEST;
2172         if (req && req_op(req) == REQ_OP_DISCARD) {
2173                 /* complete ongoing async transfer before issuing discard */
2174                 if (card->host->areq)
2175                         mmc_blk_issue_rw_rq(mq, NULL);
2176                 ret = mmc_blk_issue_discard_rq(mq, req);
2177         } else if (req && req_op(req) == REQ_OP_SECURE_ERASE) {
2178                 /* complete ongoing async transfer before issuing secure erase*/
2179                 if (card->host->areq)
2180                         mmc_blk_issue_rw_rq(mq, NULL);
2181                 ret = mmc_blk_issue_secdiscard_rq(mq, req);
2182         } else if (req && req_op(req) == REQ_OP_FLUSH) {
2183                 /* complete ongoing async transfer before issuing flush */
2184                 if (card->host->areq)
2185                         mmc_blk_issue_rw_rq(mq, NULL);
2186                 ret = mmc_blk_issue_flush(mq, req);
2187         } else {
2188                 if (!req && host->areq) {
2189                         spin_lock_irqsave(&host->context_info.lock, flags);
2190                         host->context_info.is_waiting_last_req = true;
2191                         spin_unlock_irqrestore(&host->context_info.lock, flags);
2192                 }
2193                 ret = mmc_blk_issue_rw_rq(mq, req);
2194         }
2195
2196 out:
2197         if ((!req && !(mq->flags & MMC_QUEUE_NEW_REQUEST)) || req_is_special)
2198                 /*
2199                  * Release host when there are no more requests
2200                  * and after special request(discard, flush) is done.
2201                  * In case sepecial request, there is no reentry to
2202                  * the 'mmc_blk_issue_rq' with 'mqrq_prev->req'.
2203                  */
2204                 mmc_put_card(card);
2205         return ret;
2206 }
2207
2208 static inline int mmc_blk_readonly(struct mmc_card *card)
2209 {
2210         return mmc_card_readonly(card) ||
2211                !(card->csd.cmdclass & CCC_BLOCK_WRITE);
2212 }
2213
2214 static struct mmc_blk_data *mmc_blk_alloc_req(struct mmc_card *card,
2215                                               struct device *parent,
2216                                               sector_t size,
2217                                               bool default_ro,
2218                                               const char *subname,
2219                                               int area_type)
2220 {
2221         struct mmc_blk_data *md;
2222         int devidx, ret;
2223
2224 again:
2225         if (!ida_pre_get(&mmc_blk_ida, GFP_KERNEL))
2226                 return ERR_PTR(-ENOMEM);
2227
2228         spin_lock(&mmc_blk_lock);
2229         ret = ida_get_new(&mmc_blk_ida, &devidx);
2230         spin_unlock(&mmc_blk_lock);
2231
2232         if (ret == -EAGAIN)
2233                 goto again;
2234         else if (ret)
2235                 return ERR_PTR(ret);
2236
2237         if (devidx >= max_devices) {
2238                 ret = -ENOSPC;
2239                 goto out;
2240         }
2241
2242         md = kzalloc(sizeof(struct mmc_blk_data), GFP_KERNEL);
2243         if (!md) {
2244                 ret = -ENOMEM;
2245                 goto out;
2246         }
2247
2248         md->area_type = area_type;
2249
2250         /*
2251          * Set the read-only status based on the supported commands
2252          * and the write protect switch.
2253          */
2254         md->read_only = mmc_blk_readonly(card);
2255
2256         md->disk = alloc_disk(perdev_minors);
2257         if (md->disk == NULL) {
2258                 ret = -ENOMEM;
2259                 goto err_kfree;
2260         }
2261
2262         spin_lock_init(&md->lock);
2263         INIT_LIST_HEAD(&md->part);
2264         md->usage = 1;
2265
2266         ret = mmc_init_queue(&md->queue, card, &md->lock, subname);
2267         if (ret)
2268                 goto err_putdisk;
2269
2270         md->queue.data = md;
2271
2272         md->disk->major = MMC_BLOCK_MAJOR;
2273         md->disk->first_minor = devidx * perdev_minors;
2274         md->disk->fops = &mmc_bdops;
2275         md->disk->private_data = md;
2276         md->disk->queue = md->queue.queue;
2277         md->parent = parent;
2278         set_disk_ro(md->disk, md->read_only || default_ro);
2279         md->disk->flags = GENHD_FL_EXT_DEVT;
2280         if (area_type & (MMC_BLK_DATA_AREA_RPMB | MMC_BLK_DATA_AREA_BOOT))
2281                 md->disk->flags |= GENHD_FL_NO_PART_SCAN;
2282
2283         /*
2284          * As discussed on lkml, GENHD_FL_REMOVABLE should:
2285          *
2286          * - be set for removable media with permanent block devices
2287          * - be unset for removable block devices with permanent media
2288          *
2289          * Since MMC block devices clearly fall under the second
2290          * case, we do not set GENHD_FL_REMOVABLE.  Userspace
2291          * should use the block device creation/destruction hotplug
2292          * messages to tell when the card is present.
2293          */
2294
2295         snprintf(md->disk->disk_name, sizeof(md->disk->disk_name),
2296                  "mmcblk%u%s", card->host->index, subname ? subname : "");
2297
2298         if (mmc_card_mmc(card))
2299                 blk_queue_logical_block_size(md->queue.queue,
2300                                              card->ext_csd.data_sector_size);
2301         else
2302                 blk_queue_logical_block_size(md->queue.queue, 512);
2303
2304         set_capacity(md->disk, size);
2305
2306         if (mmc_host_cmd23(card->host)) {
2307                 if ((mmc_card_mmc(card) &&
2308                      card->csd.mmca_vsn >= CSD_SPEC_VER_3) ||
2309                     (mmc_card_sd(card) &&
2310                      card->scr.cmds & SD_SCR_CMD23_SUPPORT))
2311                         md->flags |= MMC_BLK_CMD23;
2312         }
2313
2314         if (mmc_card_mmc(card) &&
2315             md->flags & MMC_BLK_CMD23 &&
2316             ((card->ext_csd.rel_param & EXT_CSD_WR_REL_PARAM_EN) ||
2317              card->ext_csd.rel_sectors)) {
2318                 md->flags |= MMC_BLK_REL_WR;
2319                 blk_queue_write_cache(md->queue.queue, true, true);
2320         }
2321
2322         if (mmc_card_mmc(card) &&
2323             (area_type == MMC_BLK_DATA_AREA_MAIN) &&
2324             (md->flags & MMC_BLK_CMD23) &&
2325             card->ext_csd.packed_event_en) {
2326                 if (!mmc_packed_init(&md->queue, card))
2327                         md->flags |= MMC_BLK_PACKED_CMD;
2328         }
2329
2330         return md;
2331
2332  err_putdisk:
2333         put_disk(md->disk);
2334  err_kfree:
2335         kfree(md);
2336  out:
2337         spin_lock(&mmc_blk_lock);
2338         ida_remove(&mmc_blk_ida, devidx);
2339         spin_unlock(&mmc_blk_lock);
2340         return ERR_PTR(ret);
2341 }
2342
2343 static struct mmc_blk_data *mmc_blk_alloc(struct mmc_card *card)
2344 {
2345         sector_t size;
2346
2347         if (!mmc_card_sd(card) && mmc_card_blockaddr(card)) {
2348                 /*
2349                  * The EXT_CSD sector count is in number or 512 byte
2350                  * sectors.
2351                  */
2352                 size = card->ext_csd.sectors;
2353         } else {
2354                 /*
2355                  * The CSD capacity field is in units of read_blkbits.
2356                  * set_capacity takes units of 512 bytes.
2357                  */
2358                 size = (typeof(sector_t))card->csd.capacity
2359                         << (card->csd.read_blkbits - 9);
2360         }
2361
2362         return mmc_blk_alloc_req(card, &card->dev, size, false, NULL,
2363                                         MMC_BLK_DATA_AREA_MAIN);
2364 }
2365
2366 static int mmc_blk_alloc_part(struct mmc_card *card,
2367                               struct mmc_blk_data *md,
2368                               unsigned int part_type,
2369                               sector_t size,
2370                               bool default_ro,
2371                               const char *subname,
2372                               int area_type)
2373 {
2374         char cap_str[10];
2375         struct mmc_blk_data *part_md;
2376
2377         part_md = mmc_blk_alloc_req(card, disk_to_dev(md->disk), size, default_ro,
2378                                     subname, area_type);
2379         if (IS_ERR(part_md))
2380                 return PTR_ERR(part_md);
2381         part_md->part_type = part_type;
2382         list_add(&part_md->part, &md->part);
2383
2384         string_get_size((u64)get_capacity(part_md->disk), 512, STRING_UNITS_2,
2385                         cap_str, sizeof(cap_str));
2386         pr_info("%s: %s %s partition %u %s\n",
2387                part_md->disk->disk_name, mmc_card_id(card),
2388                mmc_card_name(card), part_md->part_type, cap_str);
2389         return 0;
2390 }
2391
2392 /* MMC Physical partitions consist of two boot partitions and
2393  * up to four general purpose partitions.
2394  * For each partition enabled in EXT_CSD a block device will be allocatedi
2395  * to provide access to the partition.
2396  */
2397
2398 static int mmc_blk_alloc_parts(struct mmc_card *card, struct mmc_blk_data *md)
2399 {
2400         int idx, ret = 0;
2401
2402         if (!mmc_card_mmc(card))
2403                 return 0;
2404
2405         for (idx = 0; idx < card->nr_parts; idx++) {
2406                 if (card->part[idx].size) {
2407                         ret = mmc_blk_alloc_part(card, md,
2408                                 card->part[idx].part_cfg,
2409                                 card->part[idx].size >> 9,
2410                                 card->part[idx].force_ro,
2411                                 card->part[idx].name,
2412                                 card->part[idx].area_type);
2413                         if (ret)
2414                                 return ret;
2415                 }
2416         }
2417
2418         return ret;
2419 }
2420
2421 static void mmc_blk_remove_req(struct mmc_blk_data *md)
2422 {
2423         struct mmc_card *card;
2424
2425         if (md) {
2426                 /*
2427                  * Flush remaining requests and free queues. It
2428                  * is freeing the queue that stops new requests
2429                  * from being accepted.
2430                  */
2431                 card = md->queue.card;
2432                 mmc_cleanup_queue(&md->queue);
2433                 if (md->flags & MMC_BLK_PACKED_CMD)
2434                         mmc_packed_clean(&md->queue);
2435                 if (md->disk->flags & GENHD_FL_UP) {
2436                         device_remove_file(disk_to_dev(md->disk), &md->force_ro);
2437                         if ((md->area_type & MMC_BLK_DATA_AREA_BOOT) &&
2438                                         card->ext_csd.boot_ro_lockable)
2439                                 device_remove_file(disk_to_dev(md->disk),
2440                                         &md->power_ro_lock);
2441
2442                         del_gendisk(md->disk);
2443                 }
2444                 mmc_blk_put(md);
2445         }
2446 }
2447
2448 static void mmc_blk_remove_parts(struct mmc_card *card,
2449                                  struct mmc_blk_data *md)
2450 {
2451         struct list_head *pos, *q;
2452         struct mmc_blk_data *part_md;
2453
2454         list_for_each_safe(pos, q, &md->part) {
2455                 part_md = list_entry(pos, struct mmc_blk_data, part);
2456                 list_del(pos);
2457                 mmc_blk_remove_req(part_md);
2458         }
2459 }
2460
2461 static int mmc_add_disk(struct mmc_blk_data *md)
2462 {
2463         int ret;
2464         struct mmc_card *card = md->queue.card;
2465
2466         device_add_disk(md->parent, md->disk);
2467         md->force_ro.show = force_ro_show;
2468         md->force_ro.store = force_ro_store;
2469         sysfs_attr_init(&md->force_ro.attr);
2470         md->force_ro.attr.name = "force_ro";
2471         md->force_ro.attr.mode = S_IRUGO | S_IWUSR;
2472         ret = device_create_file(disk_to_dev(md->disk), &md->force_ro);
2473         if (ret)
2474                 goto force_ro_fail;
2475
2476         if ((md->area_type & MMC_BLK_DATA_AREA_BOOT) &&
2477              card->ext_csd.boot_ro_lockable) {
2478                 umode_t mode;
2479
2480                 if (card->ext_csd.boot_ro_lock & EXT_CSD_BOOT_WP_B_PWR_WP_DIS)
2481                         mode = S_IRUGO;
2482                 else
2483                         mode = S_IRUGO | S_IWUSR;
2484
2485                 md->power_ro_lock.show = power_ro_lock_show;
2486                 md->power_ro_lock.store = power_ro_lock_store;
2487                 sysfs_attr_init(&md->power_ro_lock.attr);
2488                 md->power_ro_lock.attr.mode = mode;
2489                 md->power_ro_lock.attr.name =
2490                                         "ro_lock_until_next_power_on";
2491                 ret = device_create_file(disk_to_dev(md->disk),
2492                                 &md->power_ro_lock);
2493                 if (ret)
2494                         goto power_ro_lock_fail;
2495         }
2496         return ret;
2497
2498 power_ro_lock_fail:
2499         device_remove_file(disk_to_dev(md->disk), &md->force_ro);
2500 force_ro_fail:
2501         del_gendisk(md->disk);
2502
2503         return ret;
2504 }
2505
2506 static const struct mmc_fixup blk_fixups[] =
2507 {
2508         MMC_FIXUP("SEM02G", CID_MANFID_SANDISK, 0x100, add_quirk,
2509                   MMC_QUIRK_INAND_CMD38),
2510         MMC_FIXUP("SEM04G", CID_MANFID_SANDISK, 0x100, add_quirk,
2511                   MMC_QUIRK_INAND_CMD38),
2512         MMC_FIXUP("SEM08G", CID_MANFID_SANDISK, 0x100, add_quirk,
2513                   MMC_QUIRK_INAND_CMD38),
2514         MMC_FIXUP("SEM16G", CID_MANFID_SANDISK, 0x100, add_quirk,
2515                   MMC_QUIRK_INAND_CMD38),
2516         MMC_FIXUP("SEM32G", CID_MANFID_SANDISK, 0x100, add_quirk,
2517                   MMC_QUIRK_INAND_CMD38),
2518
2519         /*
2520          * Some MMC cards experience performance degradation with CMD23
2521          * instead of CMD12-bounded multiblock transfers. For now we'll
2522          * black list what's bad...
2523          * - Certain Toshiba cards.
2524          *
2525          * N.B. This doesn't affect SD cards.
2526          */
2527         MMC_FIXUP("SDMB-32", CID_MANFID_SANDISK, CID_OEMID_ANY, add_quirk_mmc,
2528                   MMC_QUIRK_BLK_NO_CMD23),
2529         MMC_FIXUP("SDM032", CID_MANFID_SANDISK, CID_OEMID_ANY, add_quirk_mmc,
2530                   MMC_QUIRK_BLK_NO_CMD23),
2531         MMC_FIXUP("MMC08G", CID_MANFID_TOSHIBA, CID_OEMID_ANY, add_quirk_mmc,
2532                   MMC_QUIRK_BLK_NO_CMD23),
2533         MMC_FIXUP("MMC16G", CID_MANFID_TOSHIBA, CID_OEMID_ANY, add_quirk_mmc,
2534                   MMC_QUIRK_BLK_NO_CMD23),
2535         MMC_FIXUP("MMC32G", CID_MANFID_TOSHIBA, CID_OEMID_ANY, add_quirk_mmc,
2536                   MMC_QUIRK_BLK_NO_CMD23),
2537
2538         /*
2539          * Some MMC cards need longer data read timeout than indicated in CSD.
2540          */
2541         MMC_FIXUP(CID_NAME_ANY, CID_MANFID_MICRON, 0x200, add_quirk_mmc,
2542                   MMC_QUIRK_LONG_READ_TIME),
2543         MMC_FIXUP("008GE0", CID_MANFID_TOSHIBA, CID_OEMID_ANY, add_quirk_mmc,
2544                   MMC_QUIRK_LONG_READ_TIME),
2545
2546         /*
2547          * On these Samsung MoviNAND parts, performing secure erase or
2548          * secure trim can result in unrecoverable corruption due to a
2549          * firmware bug.
2550          */
2551         MMC_FIXUP("M8G2FA", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2552                   MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2553         MMC_FIXUP("MAG4FA", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2554                   MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2555         MMC_FIXUP("MBG8FA", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2556                   MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2557         MMC_FIXUP("MCGAFA", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2558                   MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2559         MMC_FIXUP("VAL00M", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2560                   MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2561         MMC_FIXUP("VYL00M", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2562                   MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2563         MMC_FIXUP("KYL00M", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2564                   MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2565         MMC_FIXUP("VZL00M", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2566                   MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2567
2568         /*
2569          *  On Some Kingston eMMCs, performing trim can result in
2570          *  unrecoverable data conrruption occasionally due to a firmware bug.
2571          */
2572         MMC_FIXUP("V10008", CID_MANFID_KINGSTON, CID_OEMID_ANY, add_quirk_mmc,
2573                   MMC_QUIRK_TRIM_BROKEN),
2574         MMC_FIXUP("V10016", CID_MANFID_KINGSTON, CID_OEMID_ANY, add_quirk_mmc,
2575                   MMC_QUIRK_TRIM_BROKEN),
2576
2577         END_FIXUP
2578 };
2579
2580 static int mmc_blk_probe(struct mmc_card *card)
2581 {
2582         struct mmc_blk_data *md, *part_md;
2583         char cap_str[10];
2584
2585         /*
2586          * Check that the card supports the command class(es) we need.
2587          */
2588         if (!(card->csd.cmdclass & CCC_BLOCK_READ))
2589                 return -ENODEV;
2590
2591         mmc_fixup_device(card, blk_fixups);
2592
2593         md = mmc_blk_alloc(card);
2594         if (IS_ERR(md))
2595                 return PTR_ERR(md);
2596
2597         string_get_size((u64)get_capacity(md->disk), 512, STRING_UNITS_2,
2598                         cap_str, sizeof(cap_str));
2599         pr_info("%s: %s %s %s %s\n",
2600                 md->disk->disk_name, mmc_card_id(card), mmc_card_name(card),
2601                 cap_str, md->read_only ? "(ro)" : "");
2602
2603         if (mmc_blk_alloc_parts(card, md))
2604                 goto out;
2605
2606         dev_set_drvdata(&card->dev, md);
2607
2608         if (mmc_add_disk(md))
2609                 goto out;
2610
2611         list_for_each_entry(part_md, &md->part, part) {
2612                 if (mmc_add_disk(part_md))
2613                         goto out;
2614         }
2615
2616         pm_runtime_set_autosuspend_delay(&card->dev, 3000);
2617         pm_runtime_use_autosuspend(&card->dev);
2618
2619         /*
2620          * Don't enable runtime PM for SD-combo cards here. Leave that
2621          * decision to be taken during the SDIO init sequence instead.
2622          */
2623         if (card->type != MMC_TYPE_SD_COMBO) {
2624                 pm_runtime_set_active(&card->dev);
2625                 pm_runtime_enable(&card->dev);
2626         }
2627
2628         return 0;
2629
2630  out:
2631         mmc_blk_remove_parts(card, md);
2632         mmc_blk_remove_req(md);
2633         return 0;
2634 }
2635
2636 static void mmc_blk_remove(struct mmc_card *card)
2637 {
2638         struct mmc_blk_data *md = dev_get_drvdata(&card->dev);
2639
2640         mmc_blk_remove_parts(card, md);
2641         pm_runtime_get_sync(&card->dev);
2642         mmc_claim_host(card->host);
2643         mmc_blk_part_switch(card, md);
2644         mmc_release_host(card->host);
2645         if (card->type != MMC_TYPE_SD_COMBO)
2646                 pm_runtime_disable(&card->dev);
2647         pm_runtime_put_noidle(&card->dev);
2648         mmc_blk_remove_req(md);
2649         dev_set_drvdata(&card->dev, NULL);
2650 }
2651
2652 static int _mmc_blk_suspend(struct mmc_card *card)
2653 {
2654         struct mmc_blk_data *part_md;
2655         struct mmc_blk_data *md = dev_get_drvdata(&card->dev);
2656
2657         if (md) {
2658                 mmc_queue_suspend(&md->queue);
2659                 list_for_each_entry(part_md, &md->part, part) {
2660                         mmc_queue_suspend(&part_md->queue);
2661                 }
2662         }
2663         return 0;
2664 }
2665
2666 static void mmc_blk_shutdown(struct mmc_card *card)
2667 {
2668         _mmc_blk_suspend(card);
2669 }
2670
2671 #ifdef CONFIG_PM_SLEEP
2672 static int mmc_blk_suspend(struct device *dev)
2673 {
2674         struct mmc_card *card = mmc_dev_to_card(dev);
2675
2676         return _mmc_blk_suspend(card);
2677 }
2678
2679 static int mmc_blk_resume(struct device *dev)
2680 {
2681         struct mmc_blk_data *part_md;
2682         struct mmc_blk_data *md = dev_get_drvdata(dev);
2683
2684         if (md) {
2685                 /*
2686                  * Resume involves the card going into idle state,
2687                  * so current partition is always the main one.
2688                  */
2689                 md->part_curr = md->part_type;
2690                 mmc_queue_resume(&md->queue);
2691                 list_for_each_entry(part_md, &md->part, part) {
2692                         mmc_queue_resume(&part_md->queue);
2693                 }
2694         }
2695         return 0;
2696 }
2697 #endif
2698
2699 static SIMPLE_DEV_PM_OPS(mmc_blk_pm_ops, mmc_blk_suspend, mmc_blk_resume);
2700
2701 static struct mmc_driver mmc_driver = {
2702         .drv            = {
2703                 .name   = "mmcblk",
2704                 .pm     = &mmc_blk_pm_ops,
2705         },
2706         .probe          = mmc_blk_probe,
2707         .remove         = mmc_blk_remove,
2708         .shutdown       = mmc_blk_shutdown,
2709 };
2710
2711 static int __init mmc_blk_init(void)
2712 {
2713         int res;
2714
2715         if (perdev_minors != CONFIG_MMC_BLOCK_MINORS)
2716                 pr_info("mmcblk: using %d minors per device\n", perdev_minors);
2717
2718         max_devices = min(MAX_DEVICES, (1 << MINORBITS) / perdev_minors);
2719
2720         res = register_blkdev(MMC_BLOCK_MAJOR, "mmc");
2721         if (res)
2722                 goto out;
2723
2724         res = mmc_register_driver(&mmc_driver);
2725         if (res)
2726                 goto out2;
2727
2728         return 0;
2729  out2:
2730         unregister_blkdev(MMC_BLOCK_MAJOR, "mmc");
2731  out:
2732         return res;
2733 }
2734
2735 static void __exit mmc_blk_exit(void)
2736 {
2737         mmc_unregister_driver(&mmc_driver);
2738         unregister_blkdev(MMC_BLOCK_MAJOR, "mmc");
2739 }
2740
2741 module_init(mmc_blk_init);
2742 module_exit(mmc_blk_exit);
2743
2744 MODULE_LICENSE("GPL");
2745 MODULE_DESCRIPTION("Multimedia Card (MMC) block device driver");
2746