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
  50 MODULE_ALIAS("mmc:block");
  51 #ifdef MODULE_PARAM_PREFIX
  52 #undef MODULE_PARAM_PREFIX
  53 #endif
  54 #define MODULE_PARAM_PREFIX "mmcblk."
  55
  56 #define INAND_CMD38_ARG_EXT_CSD  113
  57 #define INAND_CMD38_ARG_ERASE    0x00
  58 #define INAND_CMD38_ARG_TRIM     0x01
  59 #define INAND_CMD38_ARG_SECERASE 0x80
  60 #define INAND_CMD38_ARG_SECTRIM1 0x81
  61 #define INAND_CMD38_ARG_SECTRIM2 0x88
  62 #define MMC_BLK_TIMEOUT_MS  (10 * 60 * 1000)        /* 10 minute timeout */
  63 #define MMC_SANITIZE_REQ_TIMEOUT 240000
  64 #define MMC_EXTRACT_INDEX_FROM_ARG(x) ((x & 0x00FF0000) >> 16)
  65
  66 #define mmc_req_rel_wr(req)     ((req->cmd_flags & REQ_FUA) && \
  67                                   (rq_data_dir(req) == WRITE))
  68 #define PACKED_CMD_VER  0x01
  69 #define PACKED_CMD_WR   0x02
  70
  71 static DEFINE_MUTEX(block_mutex);
  72
  73 /*
  74  * The defaults come from config options but can be overriden by module
  75  * or bootarg options.
  76  */
  77 static int perdev_minors = CONFIG_MMC_BLOCK_MINORS;
  78
  79 /*
  80  * We've only got one major, so number of mmcblk devices is
  81  * limited to (1 << 20) / number of minors per device.  It is also
  82  * limited by the MAX_DEVICES below.
  83  */
  84 static int max_devices;
  85
  86 #define MAX_DEVICES 256
  87
  88 static DEFINE_IDA(mmc_blk_ida);
  89 static DEFINE_SPINLOCK(mmc_blk_lock);
  90
  91 /*
  92  * There is one mmc_blk_data per slot.
  93  */
  94 struct mmc_blk_data {
  95         spinlock_t      lock;
  96         struct gendisk  *disk;
  97         struct mmc_queue queue;
  98         struct list_head part;
  99
 100         unsigned int    flags;
 101 #define MMC_BLK_CMD23   (1 << 0)        /* Can do SET_BLOCK_COUNT for multiblock */
 102 #define MMC_BLK_REL_WR  (1 << 1)        /* MMC Reliable write support */
 103 #define MMC_BLK_PACKED_CMD      (1 << 2)        /* MMC packed command support */
 104
 105         unsigned int    usage;
 106         unsigned int    read_only;
 107         unsigned int    part_type;
 108         unsigned int    reset_done;
 109 #define MMC_BLK_READ            BIT(0)
 110 #define MMC_BLK_WRITE           BIT(1)
 111 #define MMC_BLK_DISCARD         BIT(2)
 112 #define MMC_BLK_SECDISCARD      BIT(3)
 113
 114         /*
 115          * Only set in main mmc_blk_data associated
 116          * with mmc_card with dev_set_drvdata, and keeps
 117          * track of the current selected device partition.
 118          */
 119         unsigned int    part_curr;
 120         struct device_attribute force_ro;
 121         struct device_attribute power_ro_lock;
 122         int     area_type;
 123 };
 124
 125 static DEFINE_MUTEX(open_lock);
 126
 127 enum {
 128         MMC_PACKED_NR_IDX = -1,
 129         MMC_PACKED_NR_ZERO,
 130         MMC_PACKED_NR_SINGLE,
 131 };
 132
 133 module_param(perdev_minors, int, 0444);
 134 MODULE_PARM_DESC(perdev_minors, "Minors numbers to allocate per device");
 135
 136 static inline int mmc_blk_part_switch(struct mmc_card *card,
 137                                       struct mmc_blk_data *md);
 138 static int get_card_status(struct mmc_card *card, u32 *status, int retries);
 139
 140 static inline void mmc_blk_clear_packed(struct mmc_queue_req *mqrq)
 141 {
 142         struct mmc_packed *packed = mqrq->packed;
 143
 144         BUG_ON(!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                 return idata;
 360
 361         idata->buf = kmalloc(idata->buf_bytes, GFP_KERNEL);
 362         if (!idata->buf) {
 363                 err = -ENOMEM;
 364                 goto idata_err;
 365         }
 366
 367         if (copy_from_user(idata->buf, (void __user *)(unsigned long)
 368                                         idata->ic.data_ptr, idata->buf_bytes)) {
 369                 err = -EFAULT;
 370                 goto copy_err;
 371         }
 372
 373         return idata;
 374
 375 copy_err:
 376         kfree(idata->buf);
 377 idata_err:
 378         kfree(idata);
 379 out:
 380         return ERR_PTR(err);
 381 }
 382
 383 static int mmc_blk_ioctl_copy_to_user(struct mmc_ioc_cmd __user *ic_ptr,
 384                                       struct mmc_blk_ioc_data *idata)
 385 {
 386         struct mmc_ioc_cmd *ic = &idata->ic;
 387
 388         if (copy_to_user(&(ic_ptr->response), ic->response,
 389                          sizeof(ic->response)))
 390                 return -EFAULT;
 391
 392         if (!idata->ic.write_flag) {
 393                 if (copy_to_user((void __user *)(unsigned long)ic->data_ptr,
 394                                  idata->buf, idata->buf_bytes))
 395                         return -EFAULT;
 396         }
 397
 398         return 0;
 399 }
 400
 401 static int ioctl_rpmb_card_status_poll(struct mmc_card *card, u32 *status,
 402                                        u32 retries_max)
 403 {
 404         int err;
 405         u32 retry_count = 0;
 406
 407         if (!status || !retries_max)
 408                 return -EINVAL;
 409
 410         do {
 411                 err = get_card_status(card, status, 5);
 412                 if (err)
 413                         break;
 414
 415                 if (!R1_STATUS(*status) &&
 416                                 (R1_CURRENT_STATE(*status) != R1_STATE_PRG))
 417                         break; /* RPMB programming operation complete */
 418
 419                 /*
 420                  * Rechedule to give the MMC device a chance to continue
 421                  * processing the previous command without being polled too
 422                  * frequently.
 423                  */
 424                 usleep_range(1000, 5000);
 425         } while (++retry_count < retries_max);
 426
 427         if (retry_count == retries_max)
 428                 err = -EPERM;
 429
 430         return err;
 431 }
 432
 433 static int ioctl_do_sanitize(struct mmc_card *card)
 434 {
 435         int err;
 436
 437         if (!mmc_can_sanitize(card)) {
 438                         pr_warn("%s: %s - SANITIZE is not supported\n",
 439                                 mmc_hostname(card->host), __func__);
 440                         err = -EOPNOTSUPP;
 441                         goto out;
 442         }
 443
 444         pr_debug("%s: %s - SANITIZE IN PROGRESS...\n",
 445                 mmc_hostname(card->host), __func__);
 446
 447         err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
 448                                         EXT_CSD_SANITIZE_START, 1,
 449                                         MMC_SANITIZE_REQ_TIMEOUT);
 450
 451         if (err)
 452                 pr_err("%s: %s - EXT_CSD_SANITIZE_START failed. err=%d\n",
 453                        mmc_hostname(card->host), __func__, err);
 454
 455         pr_debug("%s: %s - SANITIZE COMPLETED\n", mmc_hostname(card->host),
 456                                              __func__);
 457 out:
 458         return err;
 459 }
 460
 461 static int __mmc_blk_ioctl_cmd(struct mmc_card *card, struct mmc_blk_data *md,
 462                                struct mmc_blk_ioc_data *idata)
 463 {
 464         struct mmc_command cmd = {0};
 465         struct mmc_data data = {0};
 466         struct mmc_request mrq = {NULL};
 467         struct scatterlist sg;
 468         int err;
 469         int is_rpmb = false;
 470         u32 status = 0;
 471
 472         if (!card || !md || !idata)
 473                 return -EINVAL;
 474
 475         if (md->area_type & MMC_BLK_DATA_AREA_RPMB)
 476                 is_rpmb = true;
 477
 478         cmd.opcode = idata->ic.opcode;
 479         cmd.arg = idata->ic.arg;
 480         cmd.flags = idata->ic.flags;
 481
 482         if (idata->buf_bytes) {
 483                 data.sg = &sg;
 484                 data.sg_len = 1;
 485                 data.blksz = idata->ic.blksz;
 486                 data.blocks = idata->ic.blocks;
 487
 488                 sg_init_one(data.sg, idata->buf, idata->buf_bytes);
 489
 490                 if (idata->ic.write_flag)
 491                         data.flags = MMC_DATA_WRITE;
 492                 else
 493                         data.flags = MMC_DATA_READ;
 494
 495                 /* data.flags must already be set before doing this. */
 496                 mmc_set_data_timeout(&data, card);
 497
 498                 /* Allow overriding the timeout_ns for empirical tuning. */
 499                 if (idata->ic.data_timeout_ns)
 500                         data.timeout_ns = idata->ic.data_timeout_ns;
 501
 502                 if ((cmd.flags & MMC_RSP_R1B) == MMC_RSP_R1B) {
 503                         /*
 504                          * Pretend this is a data transfer and rely on the
 505                          * host driver to compute timeout.  When all host
 506                          * drivers support cmd.cmd_timeout for R1B, this
 507                          * can be changed to:
 508                          *
 509                          *     mrq.data = NULL;
 510                          *     cmd.cmd_timeout = idata->ic.cmd_timeout_ms;
 511                          */
 512                         data.timeout_ns = idata->ic.cmd_timeout_ms * 1000000;
 513                 }
 514
 515                 mrq.data = &data;
 516         }
 517
 518         mrq.cmd = &cmd;
 519
 520         err = mmc_blk_part_switch(card, md);
 521         if (err)
 522                 return err;
 523
 524         if (idata->ic.is_acmd) {
 525                 err = mmc_app_cmd(card->host, card);
 526                 if (err)
 527                         return err;
 528         }
 529
 530         if (is_rpmb) {
 531                 err = mmc_set_blockcount(card, data.blocks,
 532                         idata->ic.write_flag & (1 << 31));
 533                 if (err)
 534                         return err;
 535         }
 536
 537         if ((MMC_EXTRACT_INDEX_FROM_ARG(cmd.arg) == EXT_CSD_SANITIZE_START) &&
 538             (cmd.opcode == MMC_SWITCH)) {
 539                 err = ioctl_do_sanitize(card);
 540
 541                 if (err)
 542                         pr_err("%s: ioctl_do_sanitize() failed. err = %d",
 543                                __func__, err);
 544
 545                 return err;
 546         }
 547
 548         mmc_wait_for_req(card->host, &mrq);
 549
 550         if (cmd.error) {
 551                 dev_err(mmc_dev(card->host), "%s: cmd error %d\n",
 552                                                 __func__, cmd.error);
 553                 return cmd.error;
 554         }
 555         if (data.error) {
 556                 dev_err(mmc_dev(card->host), "%s: data error %d\n",
 557                                                 __func__, data.error);
 558                 return data.error;
 559         }
 560
 561         /*
 562          * According to the SD specs, some commands require a delay after
 563          * issuing the command.
 564          */
 565         if (idata->ic.postsleep_min_us)
 566                 usleep_range(idata->ic.postsleep_min_us, idata->ic.postsleep_max_us);
 567
 568         memcpy(&(idata->ic.response), cmd.resp, sizeof(cmd.resp));
 569
 570         if (is_rpmb) {
 571                 /*
 572                  * Ensure RPMB command has completed by polling CMD13
 573                  * "Send Status".
 574                  */
 575                 err = ioctl_rpmb_card_status_poll(card, &status, 5);
 576                 if (err)
 577                         dev_err(mmc_dev(card->host),
 578                                         "%s: Card Status=0x%08X, error %d\n",
 579                                         __func__, status, err);
 580         }
 581
 582         return err;
 583 }
 584
 585 static int mmc_blk_ioctl_cmd(struct block_device *bdev,
 586                              struct mmc_ioc_cmd __user *ic_ptr)
 587 {
 588         struct mmc_blk_ioc_data *idata;
 589         struct mmc_blk_data *md;
 590         struct mmc_card *card;
 591         int err = 0, ioc_err = 0;
 592
 593         /*
 594          * The caller must have CAP_SYS_RAWIO, and must be calling this on the
 595          * whole block device, not on a partition.  This prevents overspray
 596          * between sibling partitions.
 597          */
 598         if ((!capable(CAP_SYS_RAWIO)) || (bdev != bdev->bd_contains))
 599                 return -EPERM;
 600
 601         idata = mmc_blk_ioctl_copy_from_user(ic_ptr);
 602         if (IS_ERR(idata))
 603                 return PTR_ERR(idata);
 604
 605         md = mmc_blk_get(bdev->bd_disk);
 606         if (!md) {
 607                 err = -EINVAL;
 608                 goto cmd_err;
 609         }
 610
 611         card = md->queue.card;
 612         if (IS_ERR(card)) {
 613                 err = PTR_ERR(card);
 614                 goto cmd_done;
 615         }
 616
 617         mmc_get_card(card);
 618
 619         ioc_err = __mmc_blk_ioctl_cmd(card, md, idata);
 620
 621         /* Always switch back to main area after RPMB access */
 622         if (md->area_type & MMC_BLK_DATA_AREA_RPMB)
 623                 mmc_blk_part_switch(card, dev_get_drvdata(&card->dev));
 624
 625         mmc_put_card(card);
 626
 627         err = mmc_blk_ioctl_copy_to_user(ic_ptr, idata);
 628
 629 cmd_done:
 630         mmc_blk_put(md);
 631 cmd_err:
 632         kfree(idata->buf);
 633         kfree(idata);
 634         return ioc_err ? ioc_err : err;
 635 }
 636
 637 static int mmc_blk_ioctl_multi_cmd(struct block_device *bdev,
 638                                    struct mmc_ioc_multi_cmd __user *user)
 639 {
 640         struct mmc_blk_ioc_data **idata = NULL;
 641         struct mmc_ioc_cmd __user *cmds = user->cmds;
 642         struct mmc_card *card;
 643         struct mmc_blk_data *md;
 644         int i, err = 0, ioc_err = 0;
 645         __u64 num_of_cmds;
 646
 647         /*
 648          * The caller must have CAP_SYS_RAWIO, and must be calling this on the
 649          * whole block device, not on a partition.  This prevents overspray
 650          * between sibling partitions.
 651          */
 652         if ((!capable(CAP_SYS_RAWIO)) || (bdev != bdev->bd_contains))
 653                 return -EPERM;
 654
 655         if (copy_from_user(&num_of_cmds, &user->num_of_cmds,
 656                            sizeof(num_of_cmds)))
 657                 return -EFAULT;
 658
 659         if (num_of_cmds > MMC_IOC_MAX_CMDS)
 660                 return -EINVAL;
 661
 662         idata = kcalloc(num_of_cmds, sizeof(*idata), GFP_KERNEL);
 663         if (!idata)
 664                 return -ENOMEM;
 665
 666         for (i = 0; i < num_of_cmds; i++) {
 667                 idata[i] = mmc_blk_ioctl_copy_from_user(&cmds[i]);
 668                 if (IS_ERR(idata[i])) {
 669                         err = PTR_ERR(idata[i]);
 670                         num_of_cmds = i;
 671                         goto cmd_err;
 672                 }
 673         }
 674
 675         md = mmc_blk_get(bdev->bd_disk);
 676         if (!md) {
 677                 err = -EINVAL;
 678                 goto cmd_err;
 679         }
 680
 681         card = md->queue.card;
 682         if (IS_ERR(card)) {
 683                 err = PTR_ERR(card);
 684                 goto cmd_done;
 685         }
 686
 687         mmc_get_card(card);
 688
 689         for (i = 0; i < num_of_cmds && !ioc_err; i++)
 690                 ioc_err = __mmc_blk_ioctl_cmd(card, md, idata[i]);
 691
 692         /* Always switch back to main area after RPMB access */
 693         if (md->area_type & MMC_BLK_DATA_AREA_RPMB)
 694                 mmc_blk_part_switch(card, dev_get_drvdata(&card->dev));
 695
 696         mmc_put_card(card);
 697
 698         /* copy to user if data and response */
 699         for (i = 0; i < num_of_cmds && !err; i++)
 700                 err = mmc_blk_ioctl_copy_to_user(&cmds[i], idata[i]);
 701
 702 cmd_done:
 703         mmc_blk_put(md);
 704 cmd_err:
 705         for (i = 0; i < num_of_cmds; i++) {
 706                 kfree(idata[i]->buf);
 707                 kfree(idata[i]);
 708         }
 709         kfree(idata);
 710         return ioc_err ? ioc_err : err;
 711 }
 712
 713 static int mmc_blk_ioctl(struct block_device *bdev, fmode_t mode,
 714         unsigned int cmd, unsigned long arg)
 715 {
 716         switch (cmd) {
 717         case MMC_IOC_CMD:
 718                 return mmc_blk_ioctl_cmd(bdev,
 719                                 (struct mmc_ioc_cmd __user *)arg);
 720         case MMC_IOC_MULTI_CMD:
 721                 return mmc_blk_ioctl_multi_cmd(bdev,
 722                                 (struct mmc_ioc_multi_cmd __user *)arg);
 723         default:
 724                 return -EINVAL;
 725         }
 726 }
 727
 728 #ifdef CONFIG_COMPAT
 729 static int mmc_blk_compat_ioctl(struct block_device *bdev, fmode_t mode,
 730         unsigned int cmd, unsigned long arg)
 731 {
 732         return mmc_blk_ioctl(bdev, mode, cmd, (unsigned long) compat_ptr(arg));
 733 }
 734 #endif
 735
 736 static const struct block_device_operations mmc_bdops = {
 737         .open                   = mmc_blk_open,
 738         .release                = mmc_blk_release,
 739         .getgeo                 = mmc_blk_getgeo,
 740         .owner                  = THIS_MODULE,
 741         .ioctl                  = mmc_blk_ioctl,
 742 #ifdef CONFIG_COMPAT
 743         .compat_ioctl           = mmc_blk_compat_ioctl,
 744 #endif
 745 };
 746
 747 static inline int mmc_blk_part_switch(struct mmc_card *card,
 748                                       struct mmc_blk_data *md)
 749 {
 750         int ret;
 751         struct mmc_blk_data *main_md = dev_get_drvdata(&card->dev);
 752
 753         if (main_md->part_curr == md->part_type)
 754                 return 0;
 755
 756         if (mmc_card_mmc(card)) {
 757                 u8 part_config = card->ext_csd.part_config;
 758
 759                 if (md->part_type == EXT_CSD_PART_CONFIG_ACC_RPMB)
 760                         mmc_retune_pause(card->host);
 761
 762                 part_config &= ~EXT_CSD_PART_CONFIG_ACC_MASK;
 763                 part_config |= md->part_type;
 764
 765                 ret = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
 766                                  EXT_CSD_PART_CONFIG, part_config,
 767                                  card->ext_csd.part_time);
 768                 if (ret) {
 769                         if (md->part_type == EXT_CSD_PART_CONFIG_ACC_RPMB)
 770                                 mmc_retune_unpause(card->host);
 771                         return ret;
 772                 }
 773
 774                 card->ext_csd.part_config = part_config;
 775
 776                 if (main_md->part_curr == EXT_CSD_PART_CONFIG_ACC_RPMB)
 777                         mmc_retune_unpause(card->host);
 778         }
 779
 780         main_md->part_curr = md->part_type;
 781         return 0;
 782 }
 783
 784 static u32 mmc_sd_num_wr_blocks(struct mmc_card *card)
 785 {
 786         int err;
 787         u32 result;
 788         __be32 *blocks;
 789
 790         struct mmc_request mrq = {NULL};
 791         struct mmc_command cmd = {0};
 792         struct mmc_data data = {0};
 793
 794         struct scatterlist sg;
 795
 796         cmd.opcode = MMC_APP_CMD;
 797         cmd.arg = card->rca << 16;
 798         cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC;
 799
 800         err = mmc_wait_for_cmd(card->host, &cmd, 0);
 801         if (err)
 802                 return (u32)-1;
 803         if (!mmc_host_is_spi(card->host) && !(cmd.resp[0] & R1_APP_CMD))
 804                 return (u32)-1;
 805
 806         memset(&cmd, 0, sizeof(struct mmc_command));
 807
 808         cmd.opcode = SD_APP_SEND_NUM_WR_BLKS;
 809         cmd.arg = 0;
 810         cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC;
 811
 812         data.blksz = 4;
 813         data.blocks = 1;
 814         data.flags = MMC_DATA_READ;
 815         data.sg = &sg;
 816         data.sg_len = 1;
 817         mmc_set_data_timeout(&data, card);
 818
 819         mrq.cmd = &cmd;
 820         mrq.data = &data;
 821
 822         blocks = kmalloc(4, GFP_KERNEL);
 823         if (!blocks)
 824                 return (u32)-1;
 825
 826         sg_init_one(&sg, blocks, 4);
 827
 828         mmc_wait_for_req(card->host, &mrq);
 829
 830         result = ntohl(*blocks);
 831         kfree(blocks);
 832
 833         if (cmd.error || data.error)
 834                 result = (u32)-1;
 835
 836         return result;
 837 }
 838
 839 static int get_card_status(struct mmc_card *card, u32 *status, int retries)
 840 {
 841         struct mmc_command cmd = {0};
 842         int err;
 843
 844         cmd.opcode = MMC_SEND_STATUS;
 845         if (!mmc_host_is_spi(card->host))
 846                 cmd.arg = card->rca << 16;
 847         cmd.flags = MMC_RSP_SPI_R2 | MMC_RSP_R1 | MMC_CMD_AC;
 848         err = mmc_wait_for_cmd(card->host, &cmd, retries);
 849         if (err == 0)
 850                 *status = cmd.resp[0];
 851         return err;
 852 }
 853
 854 static int card_busy_detect(struct mmc_card *card, unsigned int timeout_ms,
 855                 bool hw_busy_detect, struct request *req, int *gen_err)
 856 {
 857         unsigned long timeout = jiffies + msecs_to_jiffies(timeout_ms);
 858         int err = 0;
 859         u32 status;
 860
 861         do {
 862                 err = get_card_status(card, &status, 5);
 863                 if (err) {
 864                         pr_err("%s: error %d requesting status\n",
 865                                req->rq_disk->disk_name, err);
 866                         return err;
 867                 }
 868
 869                 if (status & R1_ERROR) {
 870                         pr_err("%s: %s: error sending status cmd, status %#x\n",
 871                                 req->rq_disk->disk_name, __func__, status);
 872                         *gen_err = 1;
 873                 }
 874
 875                 /* We may rely on the host hw to handle busy detection.*/
 876                 if ((card->host->caps & MMC_CAP_WAIT_WHILE_BUSY) &&
 877                         hw_busy_detect)
 878                         break;
 879
 880                 /*
 881                  * Timeout if the device never becomes ready for data and never
 882                  * leaves the program state.
 883                  */
 884                 if (time_after(jiffies, timeout)) {
 885                         pr_err("%s: Card stuck in programming state! %s %s\n",
 886                                 mmc_hostname(card->host),
 887                                 req->rq_disk->disk_name, __func__);
 888                         return -ETIMEDOUT;
 889                 }
 890
 891                 /*
 892                  * Some cards mishandle the status bits,
 893                  * so make sure to check both the busy
 894                  * indication and the card state.
 895                  */
 896         } while (!(status & R1_READY_FOR_DATA) ||
 897                  (R1_CURRENT_STATE(status) == R1_STATE_PRG));
 898
 899         return err;
 900 }
 901
 902 static int send_stop(struct mmc_card *card, unsigned int timeout_ms,
 903                 struct request *req, int *gen_err, u32 *stop_status)
 904 {
 905         struct mmc_host *host = card->host;
 906         struct mmc_command cmd = {0};
 907         int err;
 908         bool use_r1b_resp = rq_data_dir(req) == WRITE;
 909
 910         /*
 911          * Normally we use R1B responses for WRITE, but in cases where the host
 912          * has specified a max_busy_timeout we need to validate it. A failure
 913          * means we need to prevent the host from doing hw busy detection, which
 914          * is done by converting to a R1 response instead.
 915          */
 916         if (host->max_busy_timeout && (timeout_ms > host->max_busy_timeout))
 917                 use_r1b_resp = false;
 918
 919         cmd.opcode = MMC_STOP_TRANSMISSION;
 920         if (use_r1b_resp) {
 921                 cmd.flags = MMC_RSP_SPI_R1B | MMC_RSP_R1B | MMC_CMD_AC;
 922                 cmd.busy_timeout = timeout_ms;
 923         } else {
 924                 cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC;
 925         }
 926
 927         err = mmc_wait_for_cmd(host, &cmd, 5);
 928         if (err)
 929                 return err;
 930
 931         *stop_status = cmd.resp[0];
 932
 933         /* No need to check card status in case of READ. */
 934         if (rq_data_dir(req) == READ)
 935                 return 0;
 936
 937         if (!mmc_host_is_spi(host) &&
 938                 (*stop_status & R1_ERROR)) {
 939                 pr_err("%s: %s: general error sending stop command, resp %#x\n",
 940                         req->rq_disk->disk_name, __func__, *stop_status);
 941                 *gen_err = 1;
 942         }
 943
 944         return card_busy_detect(card, timeout_ms, use_r1b_resp, req, gen_err);
 945 }
 946
 947 #define ERR_NOMEDIUM    3
 948 #define ERR_RETRY       2
 949 #define ERR_ABORT       1
 950 #define ERR_CONTINUE    0
 951
 952 static int mmc_blk_cmd_error(struct request *req, const char *name, int error,
 953         bool status_valid, u32 status)
 954 {
 955         switch (error) {
 956         case -EILSEQ:
 957                 /* response crc error, retry the r/w cmd */
 958                 pr_err("%s: %s sending %s command, card status %#x\n",
 959                         req->rq_disk->disk_name, "response CRC error",
 960                         name, status);
 961                 return ERR_RETRY;
 962
 963         case -ETIMEDOUT:
 964                 pr_err("%s: %s sending %s command, card status %#x\n",
 965                         req->rq_disk->disk_name, "timed out", name, status);
 966
 967                 /* If the status cmd initially failed, retry the r/w cmd */
 968                 if (!status_valid) {
 969                         pr_err("%s: status not valid, retrying timeout\n",
 970                                 req->rq_disk->disk_name);
 971                         return ERR_RETRY;
 972                 }
 973
 974                 /*
 975                  * If it was a r/w cmd crc error, or illegal command
 976                  * (eg, issued in wrong state) then retry - we should
 977                  * have corrected the state problem above.
 978                  */
 979                 if (status & (R1_COM_CRC_ERROR | R1_ILLEGAL_COMMAND)) {
 980                         pr_err("%s: command error, retrying timeout\n",
 981                                 req->rq_disk->disk_name);
 982                         return ERR_RETRY;
 983                 }
 984
 985                 /* Otherwise abort the command */
 986                 return ERR_ABORT;
 987
 988         default:
 989                 /* We don't understand the error code the driver gave us */
 990                 pr_err("%s: unknown error %d sending read/write command, card status %#x\n",
 991                        req->rq_disk->disk_name, error, status);
 992                 return ERR_ABORT;
 993         }
 994 }
 995
 996 /*
 997  * Initial r/w and stop cmd error recovery.
 998  * We don't know whether the card received the r/w cmd or not, so try to
 999  * restore things back to a sane state.  Essentially, we do this as follows:
1000  * - Obtain card status.  If the first attempt to obtain card status fails,
1001  *   the status word will reflect the failed status cmd, not the failed
1002  *   r/w cmd.  If we fail to obtain card status, it suggests we can no
1003  *   longer communicate with the card.
1004  * - Check the card state.  If the card received the cmd but there was a
1005  *   transient problem with the response, it might still be in a data transfer
1006  *   mode.  Try to send it a stop command.  If this fails, we can't recover.
1007  * - If the r/w cmd failed due to a response CRC error, it was probably
1008  *   transient, so retry the cmd.
1009  * - If the r/w cmd timed out, but we didn't get the r/w cmd status, retry.
1010  * - If the r/w cmd timed out, and the r/w cmd failed due to CRC error or
1011  *   illegal cmd, retry.
1012  * Otherwise we don't understand what happened, so abort.
1013  */
1014 static int mmc_blk_cmd_recovery(struct mmc_card *card, struct request *req,
1015         struct mmc_blk_request *brq, int *ecc_err, int *gen_err)
1016 {
1017         bool prev_cmd_status_valid = true;
1018         u32 status, stop_status = 0;
1019         int err, retry;
1020
1021         if (mmc_card_removed(card))
1022                 return ERR_NOMEDIUM;
1023
1024         /*
1025          * Try to get card status which indicates both the card state
1026          * and why there was no response.  If the first attempt fails,
1027          * we can't be sure the returned status is for the r/w command.
1028          */
1029         for (retry = 2; retry >= 0; retry--) {
1030                 err = get_card_status(card, &status, 0);
1031                 if (!err)
1032                         break;
1033
1034                 /* Re-tune if needed */
1035                 mmc_retune_recheck(card->host);
1036
1037                 prev_cmd_status_valid = false;
1038                 pr_err("%s: error %d sending status command, %sing\n",
1039                        req->rq_disk->disk_name, err, retry ? "retry" : "abort");
1040         }
1041
1042         /* We couldn't get a response from the card.  Give up. */
1043         if (err) {
1044                 /* Check if the card is removed */
1045                 if (mmc_detect_card_removed(card->host))
1046                         return ERR_NOMEDIUM;
1047                 return ERR_ABORT;
1048         }
1049
1050         /* Flag ECC errors */
1051         if ((status & R1_CARD_ECC_FAILED) ||
1052             (brq->stop.resp[0] & R1_CARD_ECC_FAILED) ||
1053             (brq->cmd.resp[0] & R1_CARD_ECC_FAILED))
1054                 *ecc_err = 1;
1055
1056         /* Flag General errors */
1057         if (!mmc_host_is_spi(card->host) && rq_data_dir(req) != READ)
1058                 if ((status & R1_ERROR) ||
1059                         (brq->stop.resp[0] & R1_ERROR)) {
1060                         pr_err("%s: %s: general error sending stop or status command, stop cmd response %#x, card status %#x\n",
1061                                req->rq_disk->disk_name, __func__,
1062                                brq->stop.resp[0], status);
1063                         *gen_err = 1;
1064                 }
1065
1066         /*
1067          * Check the current card state.  If it is in some data transfer
1068          * mode, tell it to stop (and hopefully transition back to TRAN.)
1069          */
1070         if (R1_CURRENT_STATE(status) == R1_STATE_DATA ||
1071             R1_CURRENT_STATE(status) == R1_STATE_RCV) {
1072                 err = send_stop(card,
1073                         DIV_ROUND_UP(brq->data.timeout_ns, 1000000),
1074                         req, gen_err, &stop_status);
1075                 if (err) {
1076                         pr_err("%s: error %d sending stop command\n",
1077                                req->rq_disk->disk_name, err);
1078                         /*
1079                          * If the stop cmd also timed out, the card is probably
1080                          * not present, so abort. Other errors are bad news too.
1081                          */
1082                         return ERR_ABORT;
1083                 }
1084
1085                 if (stop_status & R1_CARD_ECC_FAILED)
1086                         *ecc_err = 1;
1087         }
1088
1089         /* Check for set block count errors */
1090         if (brq->sbc.error)
1091                 return mmc_blk_cmd_error(req, "SET_BLOCK_COUNT", brq->sbc.error,
1092                                 prev_cmd_status_valid, status);
1093
1094         /* Check for r/w command errors */
1095         if (brq->cmd.error)
1096                 return mmc_blk_cmd_error(req, "r/w cmd", brq->cmd.error,
1097                                 prev_cmd_status_valid, status);
1098
1099         /* Data errors */
1100         if (!brq->stop.error)
1101                 return ERR_CONTINUE;
1102
1103         /* Now for stop errors.  These aren't fatal to the transfer. */
1104         pr_info("%s: error %d sending stop command, original cmd response %#x, card status %#x\n",
1105                req->rq_disk->disk_name, brq->stop.error,
1106                brq->cmd.resp[0], status);
1107
1108         /*
1109          * Subsitute in our own stop status as this will give the error
1110          * state which happened during the execution of the r/w command.
1111          */
1112         if (stop_status) {
1113                 brq->stop.resp[0] = stop_status;
1114                 brq->stop.error = 0;
1115         }
1116         return ERR_CONTINUE;
1117 }
1118
1119 static int mmc_blk_reset(struct mmc_blk_data *md, struct mmc_host *host,
1120                          int type)
1121 {
1122         int err;
1123
1124         if (md->reset_done & type)
1125                 return -EEXIST;
1126
1127         md->reset_done |= type;
1128         err = mmc_hw_reset(host);
1129         /* Ensure we switch back to the correct partition */
1130         if (err != -EOPNOTSUPP) {
1131                 struct mmc_blk_data *main_md =
1132                         dev_get_drvdata(&host->card->dev);
1133                 int part_err;
1134
1135                 main_md->part_curr = main_md->part_type;
1136                 part_err = mmc_blk_part_switch(host->card, md);
1137                 if (part_err) {
1138                         /*
1139                          * We have failed to get back into the correct
1140                          * partition, so we need to abort the whole request.
1141                          */
1142                         return -ENODEV;
1143                 }
1144         }
1145         return err;
1146 }
1147
1148 static inline void mmc_blk_reset_success(struct mmc_blk_data *md, int type)
1149 {
1150         md->reset_done &= ~type;
1151 }
1152
1153 int mmc_access_rpmb(struct mmc_queue *mq)
1154 {
1155         struct mmc_blk_data *md = mq->data;
1156         /*
1157          * If this is a RPMB partition access, return ture
1158          */
1159         if (md && md->part_type == EXT_CSD_PART_CONFIG_ACC_RPMB)
1160                 return true;
1161
1162         return false;
1163 }
1164
1165 static int mmc_blk_issue_discard_rq(struct mmc_queue *mq, struct request *req)
1166 {
1167         struct mmc_blk_data *md = mq->data;
1168         struct mmc_card *card = md->queue.card;
1169         unsigned int from, nr, arg;
1170         int err = 0, type = MMC_BLK_DISCARD;
1171
1172         if (!mmc_can_erase(card)) {
1173                 err = -EOPNOTSUPP;
1174                 goto out;
1175         }
1176
1177         from = blk_rq_pos(req);
1178         nr = blk_rq_sectors(req);
1179
1180         if (mmc_can_discard(card))
1181                 arg = MMC_DISCARD_ARG;
1182         else if (mmc_can_trim(card))
1183                 arg = MMC_TRIM_ARG;
1184         else
1185                 arg = MMC_ERASE_ARG;
1186 retry:
1187         if (card->quirks & MMC_QUIRK_INAND_CMD38) {
1188                 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1189                                  INAND_CMD38_ARG_EXT_CSD,
1190                                  arg == MMC_TRIM_ARG ?
1191                                  INAND_CMD38_ARG_TRIM :
1192                                  INAND_CMD38_ARG_ERASE,
1193                                  0);
1194                 if (err)
1195                         goto out;
1196         }
1197         err = mmc_erase(card, from, nr, arg);
1198 out:
1199         if (err == -EIO && !mmc_blk_reset(md, card->host, type))
1200                 goto retry;
1201         if (!err)
1202                 mmc_blk_reset_success(md, type);
1203         blk_end_request(req, err, blk_rq_bytes(req));
1204
1205         return err ? 0 : 1;
1206 }
1207
1208 static int mmc_blk_issue_secdiscard_rq(struct mmc_queue *mq,
1209                                        struct request *req)
1210 {
1211         struct mmc_blk_data *md = mq->data;
1212         struct mmc_card *card = md->queue.card;
1213         unsigned int from, nr, arg;
1214         int err = 0, type = MMC_BLK_SECDISCARD;
1215
1216         if (!(mmc_can_secure_erase_trim(card))) {
1217                 err = -EOPNOTSUPP;
1218                 goto out;
1219         }
1220
1221         from = blk_rq_pos(req);
1222         nr = blk_rq_sectors(req);
1223
1224         if (mmc_can_trim(card) && !mmc_erase_group_aligned(card, from, nr))
1225                 arg = MMC_SECURE_TRIM1_ARG;
1226         else
1227                 arg = MMC_SECURE_ERASE_ARG;
1228
1229 retry:
1230         if (card->quirks & MMC_QUIRK_INAND_CMD38) {
1231                 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1232                                  INAND_CMD38_ARG_EXT_CSD,
1233                                  arg == MMC_SECURE_TRIM1_ARG ?
1234                                  INAND_CMD38_ARG_SECTRIM1 :
1235                                  INAND_CMD38_ARG_SECERASE,
1236                                  0);
1237                 if (err)
1238                         goto out_retry;
1239         }
1240
1241         err = mmc_erase(card, from, nr, arg);
1242         if (err == -EIO)
1243                 goto out_retry;
1244         if (err)
1245                 goto out;
1246
1247         if (arg == MMC_SECURE_TRIM1_ARG) {
1248                 if (card->quirks & MMC_QUIRK_INAND_CMD38) {
1249                         err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1250                                          INAND_CMD38_ARG_EXT_CSD,
1251                                          INAND_CMD38_ARG_SECTRIM2,
1252                                          0);
1253                         if (err)
1254                                 goto out_retry;
1255                 }
1256
1257                 err = mmc_erase(card, from, nr, MMC_SECURE_TRIM2_ARG);
1258                 if (err == -EIO)
1259                         goto out_retry;
1260                 if (err)
1261                         goto out;
1262         }
1263
1264 out_retry:
1265         if (err && !mmc_blk_reset(md, card->host, type))
1266                 goto retry;
1267         if (!err)
1268                 mmc_blk_reset_success(md, type);
1269 out:
1270         blk_end_request(req, err, blk_rq_bytes(req));
1271
1272         return err ? 0 : 1;
1273 }
1274
1275 static int mmc_blk_issue_flush(struct mmc_queue *mq, struct request *req)
1276 {
1277         struct mmc_blk_data *md = mq->data;
1278         struct mmc_card *card = md->queue.card;
1279         int ret = 0;
1280
1281         ret = mmc_flush_cache(card);
1282         if (ret)
1283                 ret = -EIO;
1284
1285         blk_end_request_all(req, ret);
1286
1287         return ret ? 0 : 1;
1288 }
1289
1290 /*
1291  * Reformat current write as a reliable write, supporting
1292  * both legacy and the enhanced reliable write MMC cards.
1293  * In each transfer we'll handle only as much as a single
1294  * reliable write can handle, thus finish the request in
1295  * partial completions.
1296  */
1297 static inline void mmc_apply_rel_rw(struct mmc_blk_request *brq,
1298                                     struct mmc_card *card,
1299                                     struct request *req)
1300 {
1301         if (!(card->ext_csd.rel_param & EXT_CSD_WR_REL_PARAM_EN)) {
1302                 /* Legacy mode imposes restrictions on transfers. */
1303                 if (!IS_ALIGNED(brq->cmd.arg, card->ext_csd.rel_sectors))
1304                         brq->data.blocks = 1;
1305
1306                 if (brq->data.blocks > card->ext_csd.rel_sectors)
1307                         brq->data.blocks = card->ext_csd.rel_sectors;
1308                 else if (brq->data.blocks < card->ext_csd.rel_sectors)
1309                         brq->data.blocks = 1;
1310         }
1311 }
1312
1313 #define CMD_ERRORS                                                      \
1314         (R1_OUT_OF_RANGE |      /* Command argument out of range */     \
1315          R1_ADDRESS_ERROR |     /* Misaligned address */                \
1316          R1_BLOCK_LEN_ERROR |   /* Transferred block length incorrect */\
1317          R1_WP_VIOLATION |      /* Tried to write to protected block */ \
1318          R1_CC_ERROR |          /* Card controller error */             \
1319          R1_ERROR)              /* General/unknown error */
1320
1321 static int mmc_blk_err_check(struct mmc_card *card,
1322                              struct mmc_async_req *areq)
1323 {
1324         struct mmc_queue_req *mq_mrq = container_of(areq, struct mmc_queue_req,
1325                                                     mmc_active);
1326         struct mmc_blk_request *brq = &mq_mrq->brq;
1327         struct request *req = mq_mrq->req;
1328         int need_retune = card->host->need_retune;
1329         int ecc_err = 0, gen_err = 0;
1330
1331         /*
1332          * sbc.error indicates a problem with the set block count
1333          * command.  No data will have been transferred.
1334          *
1335          * cmd.error indicates a problem with the r/w command.  No
1336          * data will have been transferred.
1337          *
1338          * stop.error indicates a problem with the stop command.  Data
1339          * may have been transferred, or may still be transferring.
1340          */
1341         if (brq->sbc.error || brq->cmd.error || brq->stop.error ||
1342             brq->data.error) {
1343                 switch (mmc_blk_cmd_recovery(card, req, brq, &ecc_err, &gen_err)) {
1344                 case ERR_RETRY:
1345                         return MMC_BLK_RETRY;
1346                 case ERR_ABORT:
1347                         return MMC_BLK_ABORT;
1348                 case ERR_NOMEDIUM:
1349                         return MMC_BLK_NOMEDIUM;
1350                 case ERR_CONTINUE:
1351                         break;
1352                 }
1353         }
1354
1355         /*
1356          * Check for errors relating to the execution of the
1357          * initial command - such as address errors.  No data
1358          * has been transferred.
1359          */
1360         if (brq->cmd.resp[0] & CMD_ERRORS) {
1361                 pr_err("%s: r/w command failed, status = %#x\n",
1362                        req->rq_disk->disk_name, brq->cmd.resp[0]);
1363                 return MMC_BLK_ABORT;
1364         }
1365
1366         /*
1367          * Everything else is either success, or a data error of some
1368          * kind.  If it was a write, we may have transitioned to
1369          * program mode, which we have to wait for it to complete.
1370          */
1371         if (!mmc_host_is_spi(card->host) && rq_data_dir(req) != READ) {
1372                 int err;
1373
1374                 /* Check stop command response */
1375                 if (brq->stop.resp[0] & R1_ERROR) {
1376                         pr_err("%s: %s: general error sending stop command, stop cmd response %#x\n",
1377                                req->rq_disk->disk_name, __func__,
1378                                brq->stop.resp[0]);
1379                         gen_err = 1;
1380                 }
1381
1382                 err = card_busy_detect(card, MMC_BLK_TIMEOUT_MS, false, req,
1383                                         &gen_err);
1384                 if (err)
1385                         return MMC_BLK_CMD_ERR;
1386         }
1387
1388         /* if general error occurs, retry the write operation. */
1389         if (gen_err) {
1390                 pr_warn("%s: retrying write for general error\n",
1391                                 req->rq_disk->disk_name);
1392                 return MMC_BLK_RETRY;
1393         }
1394
1395         if (brq->data.error) {
1396                 if (need_retune && !brq->retune_retry_done) {
1397                         pr_debug("%s: retrying because a re-tune was needed\n",
1398                                  req->rq_disk->disk_name);
1399                         brq->retune_retry_done = 1;
1400                         return MMC_BLK_RETRY;
1401                 }
1402                 pr_err("%s: error %d transferring data, sector %u, nr %u, cmd response %#x, card status %#x\n",
1403                        req->rq_disk->disk_name, brq->data.error,
1404                        (unsigned)blk_rq_pos(req),
1405                        (unsigned)blk_rq_sectors(req),
1406                        brq->cmd.resp[0], brq->stop.resp[0]);
1407
1408                 if (rq_data_dir(req) == READ) {
1409                         if (ecc_err)
1410                                 return MMC_BLK_ECC_ERR;
1411                         return MMC_BLK_DATA_ERR;
1412                 } else {
1413                         return MMC_BLK_CMD_ERR;
1414                 }
1415         }
1416
1417         if (!brq->data.bytes_xfered)
1418                 return MMC_BLK_RETRY;
1419
1420         if (mmc_packed_cmd(mq_mrq->cmd_type)) {
1421                 if (unlikely(brq->data.blocks << 9 != brq->data.bytes_xfered))
1422                         return MMC_BLK_PARTIAL;
1423                 else
1424                         return MMC_BLK_SUCCESS;
1425         }
1426
1427         if (blk_rq_bytes(req) != brq->data.bytes_xfered)
1428                 return MMC_BLK_PARTIAL;
1429
1430         return MMC_BLK_SUCCESS;
1431 }
1432
1433 static int mmc_blk_packed_err_check(struct mmc_card *card,
1434                                     struct mmc_async_req *areq)
1435 {
1436         struct mmc_queue_req *mq_rq = container_of(areq, struct mmc_queue_req,
1437                         mmc_active);
1438         struct request *req = mq_rq->req;
1439         struct mmc_packed *packed = mq_rq->packed;
1440         int err, check, status;
1441         u8 *ext_csd;
1442
1443         BUG_ON(!packed);
1444
1445         packed->retries--;
1446         check = mmc_blk_err_check(card, areq);
1447         err = get_card_status(card, &status, 0);
1448         if (err) {
1449                 pr_err("%s: error %d sending status command\n",
1450                        req->rq_disk->disk_name, err);
1451                 return MMC_BLK_ABORT;
1452         }
1453
1454         if (status & R1_EXCEPTION_EVENT) {
1455                 err = mmc_get_ext_csd(card, &ext_csd);
1456                 if (err) {
1457                         pr_err("%s: error %d sending ext_csd\n",
1458                                req->rq_disk->disk_name, err);
1459                         return MMC_BLK_ABORT;
1460                 }
1461
1462                 if ((ext_csd[EXT_CSD_EXP_EVENTS_STATUS] &
1463                      EXT_CSD_PACKED_FAILURE) &&
1464                     (ext_csd[EXT_CSD_PACKED_CMD_STATUS] &
1465                      EXT_CSD_PACKED_GENERIC_ERROR)) {
1466                         if (ext_csd[EXT_CSD_PACKED_CMD_STATUS] &
1467                             EXT_CSD_PACKED_INDEXED_ERROR) {
1468                                 packed->idx_failure =
1469                                   ext_csd[EXT_CSD_PACKED_FAILURE_INDEX] - 1;
1470                                 check = MMC_BLK_PARTIAL;
1471                         }
1472                         pr_err("%s: packed cmd failed, nr %u, sectors %u, "
1473                                "failure index: %d\n",
1474                                req->rq_disk->disk_name, packed->nr_entries,
1475                                packed->blocks, packed->idx_failure);
1476                 }
1477                 kfree(ext_csd);
1478         }
1479
1480         return check;
1481 }
1482
1483 static void mmc_blk_rw_rq_prep(struct mmc_queue_req *mqrq,
1484                                struct mmc_card *card,
1485                                int disable_multi,
1486                                struct mmc_queue *mq)
1487 {
1488         u32 readcmd, writecmd;
1489         struct mmc_blk_request *brq = &mqrq->brq;
1490         struct request *req = mqrq->req;
1491         struct mmc_blk_data *md = mq->data;
1492         bool do_data_tag;
1493
1494         /*
1495          * Reliable writes are used to implement Forced Unit Access and
1496          * are supported only on MMCs.
1497          */
1498         bool do_rel_wr = (req->cmd_flags & REQ_FUA) &&
1499                 (rq_data_dir(req) == WRITE) &&
1500                 (md->flags & MMC_BLK_REL_WR);
1501
1502         memset(brq, 0, sizeof(struct mmc_blk_request));
1503         brq->mrq.cmd = &brq->cmd;
1504         brq->mrq.data = &brq->data;
1505
1506         brq->cmd.arg = blk_rq_pos(req);
1507         if (!mmc_card_blockaddr(card))
1508                 brq->cmd.arg <<= 9;
1509         brq->cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC;
1510         brq->data.blksz = 512;
1511         brq->stop.opcode = MMC_STOP_TRANSMISSION;
1512         brq->stop.arg = 0;
1513         brq->data.blocks = blk_rq_sectors(req);
1514
1515         /*
1516          * The block layer doesn't support all sector count
1517          * restrictions, so we need to be prepared for too big
1518          * requests.
1519          */
1520         if (brq->data.blocks > card->host->max_blk_count)
1521                 brq->data.blocks = card->host->max_blk_count;
1522
1523         if (brq->data.blocks > 1) {
1524                 /*
1525                  * After a read error, we redo the request one sector
1526                  * at a time in order to accurately determine which
1527                  * sectors can be read successfully.
1528                  */
1529                 if (disable_multi)
1530                         brq->data.blocks = 1;
1531
1532                 /*
1533                  * Some controllers have HW issues while operating
1534                  * in multiple I/O mode
1535                  */
1536                 if (card->host->ops->multi_io_quirk)
1537                         brq->data.blocks = card->host->ops->multi_io_quirk(card,
1538                                                 (rq_data_dir(req) == READ) ?
1539                                                 MMC_DATA_READ : MMC_DATA_WRITE,
1540                                                 brq->data.blocks);
1541         }
1542
1543         if (brq->data.blocks > 1 || do_rel_wr) {
1544                 /* SPI multiblock writes terminate using a special
1545                  * token, not a STOP_TRANSMISSION request.
1546                  */
1547                 if (!mmc_host_is_spi(card->host) ||
1548                     rq_data_dir(req) == READ)
1549                         brq->mrq.stop = &brq->stop;
1550                 readcmd = MMC_READ_MULTIPLE_BLOCK;
1551                 writecmd = MMC_WRITE_MULTIPLE_BLOCK;
1552         } else {
1553                 brq->mrq.stop = NULL;
1554                 readcmd = MMC_READ_SINGLE_BLOCK;
1555                 writecmd = MMC_WRITE_BLOCK;
1556         }
1557         if (rq_data_dir(req) == READ) {
1558                 brq->cmd.opcode = readcmd;
1559                 brq->data.flags = MMC_DATA_READ;
1560                 if (brq->mrq.stop)
1561                         brq->stop.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 |
1562                                         MMC_CMD_AC;
1563         } else {
1564                 brq->cmd.opcode = writecmd;
1565                 brq->data.flags = MMC_DATA_WRITE;
1566                 if (brq->mrq.stop)
1567                         brq->stop.flags = MMC_RSP_SPI_R1B | MMC_RSP_R1B |
1568                                         MMC_CMD_AC;
1569         }
1570
1571         if (do_rel_wr)
1572                 mmc_apply_rel_rw(brq, card, req);
1573
1574         /*
1575          * Data tag is used only during writing meta data to speed
1576          * up write and any subsequent read of this meta data
1577          */
1578         do_data_tag = (card->ext_csd.data_tag_unit_size) &&
1579                 (req->cmd_flags & REQ_META) &&
1580                 (rq_data_dir(req) == WRITE) &&
1581                 ((brq->data.blocks * brq->data.blksz) >=
1582                  card->ext_csd.data_tag_unit_size);
1583
1584         /*
1585          * Pre-defined multi-block transfers are preferable to
1586          * open ended-ones (and necessary for reliable writes).
1587          * However, it is not sufficient to just send CMD23,
1588          * and avoid the final CMD12, as on an error condition
1589          * CMD12 (stop) needs to be sent anyway. This, coupled
1590          * with Auto-CMD23 enhancements provided by some
1591          * hosts, means that the complexity of dealing
1592          * with this is best left to the host. If CMD23 is
1593          * supported by card and host, we'll fill sbc in and let
1594          * the host deal with handling it correctly. This means
1595          * that for hosts that don't expose MMC_CAP_CMD23, no
1596          * change of behavior will be observed.
1597          *
1598          * N.B: Some MMC cards experience perf degradation.
1599          * We'll avoid using CMD23-bounded multiblock writes for
1600          * these, while retaining features like reliable writes.
1601          */
1602         if ((md->flags & MMC_BLK_CMD23) && mmc_op_multi(brq->cmd.opcode) &&
1603             (do_rel_wr || !(card->quirks & MMC_QUIRK_BLK_NO_CMD23) ||
1604              do_data_tag)) {
1605                 brq->sbc.opcode = MMC_SET_BLOCK_COUNT;
1606                 brq->sbc.arg = brq->data.blocks |
1607                         (do_rel_wr ? (1 << 31) : 0) |
1608                         (do_data_tag ? (1 << 29) : 0);
1609                 brq->sbc.flags = MMC_RSP_R1 | MMC_CMD_AC;
1610                 brq->mrq.sbc = &brq->sbc;
1611         }
1612
1613         mmc_set_data_timeout(&brq->data, card);
1614
1615         brq->data.sg = mqrq->sg;
1616         brq->data.sg_len = mmc_queue_map_sg(mq, mqrq);
1617
1618         /*
1619          * Adjust the sg list so it is the same size as the
1620          * request.
1621          */
1622         if (brq->data.blocks != blk_rq_sectors(req)) {
1623                 int i, data_size = brq->data.blocks << 9;
1624                 struct scatterlist *sg;
1625
1626                 for_each_sg(brq->data.sg, sg, brq->data.sg_len, i) {
1627                         data_size -= sg->length;
1628                         if (data_size <= 0) {
1629                                 sg->length += data_size;
1630                                 i++;
1631                                 break;
1632                         }
1633                 }
1634                 brq->data.sg_len = i;
1635         }
1636
1637         mqrq->mmc_active.mrq = &brq->mrq;
1638         mqrq->mmc_active.err_check = mmc_blk_err_check;
1639
1640         mmc_queue_bounce_pre(mqrq);
1641 }
1642
1643 static inline u8 mmc_calc_packed_hdr_segs(struct request_queue *q,
1644                                           struct mmc_card *card)
1645 {
1646         unsigned int hdr_sz = mmc_large_sector(card) ? 4096 : 512;
1647         unsigned int max_seg_sz = queue_max_segment_size(q);
1648         unsigned int len, nr_segs = 0;
1649
1650         do {
1651                 len = min(hdr_sz, max_seg_sz);
1652                 hdr_sz -= len;
1653                 nr_segs++;
1654         } while (hdr_sz);
1655
1656         return nr_segs;
1657 }
1658
1659 static u8 mmc_blk_prep_packed_list(struct mmc_queue *mq, struct request *req)
1660 {
1661         struct request_queue *q = mq->queue;
1662         struct mmc_card *card = mq->card;
1663         struct request *cur = req, *next = NULL;
1664         struct mmc_blk_data *md = mq->data;
1665         struct mmc_queue_req *mqrq = mq->mqrq_cur;
1666         bool en_rel_wr = card->ext_csd.rel_param & EXT_CSD_WR_REL_PARAM_EN;
1667         unsigned int req_sectors = 0, phys_segments = 0;
1668         unsigned int max_blk_count, max_phys_segs;
1669         bool put_back = true;
1670         u8 max_packed_rw = 0;
1671         u8 reqs = 0;
1672
1673         if (!(md->flags & MMC_BLK_PACKED_CMD))
1674                 goto no_packed;
1675
1676         if ((rq_data_dir(cur) == WRITE) &&
1677             mmc_host_packed_wr(card->host))
1678                 max_packed_rw = card->ext_csd.max_packed_writes;
1679
1680         if (max_packed_rw == 0)
1681                 goto no_packed;
1682
1683         if (mmc_req_rel_wr(cur) &&
1684             (md->flags & MMC_BLK_REL_WR) && !en_rel_wr)
1685                 goto no_packed;
1686
1687         if (mmc_large_sector(card) &&
1688             !IS_ALIGNED(blk_rq_sectors(cur), 8))
1689                 goto no_packed;
1690
1691         mmc_blk_clear_packed(mqrq);
1692
1693         max_blk_count = min(card->host->max_blk_count,
1694                             card->host->max_req_size >> 9);
1695         if (unlikely(max_blk_count > 0xffff))
1696                 max_blk_count = 0xffff;
1697
1698         max_phys_segs = queue_max_segments(q);
1699         req_sectors += blk_rq_sectors(cur);
1700         phys_segments += cur->nr_phys_segments;
1701
1702         if (rq_data_dir(cur) == WRITE) {
1703                 req_sectors += mmc_large_sector(card) ? 8 : 1;
1704                 phys_segments += mmc_calc_packed_hdr_segs(q, card);
1705         }
1706
1707         do {
1708                 if (reqs >= max_packed_rw - 1) {
1709                         put_back = false;
1710                         break;
1711                 }
1712
1713                 spin_lock_irq(q->queue_lock);
1714                 next = blk_fetch_request(q);
1715                 spin_unlock_irq(q->queue_lock);
1716                 if (!next) {
1717                         put_back = false;
1718                         break;
1719                 }
1720
1721                 if (mmc_large_sector(card) &&
1722                     !IS_ALIGNED(blk_rq_sectors(next), 8))
1723                         break;
1724
1725                 if (req_op(next) == REQ_OP_DISCARD || next->cmd_flags & REQ_FLUSH)
1726                         break;
1727
1728                 if (rq_data_dir(cur) != rq_data_dir(next))
1729                         break;
1730
1731                 if (mmc_req_rel_wr(next) &&
1732                     (md->flags & MMC_BLK_REL_WR) && !en_rel_wr)
1733                         break;
1734
1735                 req_sectors += blk_rq_sectors(next);
1736                 if (req_sectors > max_blk_count)
1737                         break;
1738
1739                 phys_segments +=  next->nr_phys_segments;
1740                 if (phys_segments > max_phys_segs)
1741                         break;
1742
1743                 list_add_tail(&next->queuelist, &mqrq->packed->list);
1744                 cur = next;
1745                 reqs++;
1746         } while (1);
1747
1748         if (put_back) {
1749                 spin_lock_irq(q->queue_lock);
1750                 blk_requeue_request(q, next);
1751                 spin_unlock_irq(q->queue_lock);
1752         }
1753
1754         if (reqs > 0) {
1755                 list_add(&req->queuelist, &mqrq->packed->list);
1756                 mqrq->packed->nr_entries = ++reqs;
1757                 mqrq->packed->retries = reqs;
1758                 return reqs;
1759         }
1760
1761 no_packed:
1762         mqrq->cmd_type = MMC_PACKED_NONE;
1763         return 0;
1764 }
1765
1766 static void mmc_blk_packed_hdr_wrq_prep(struct mmc_queue_req *mqrq,
1767                                         struct mmc_card *card,
1768                                         struct mmc_queue *mq)
1769 {
1770         struct mmc_blk_request *brq = &mqrq->brq;
1771         struct request *req = mqrq->req;
1772         struct request *prq;
1773         struct mmc_blk_data *md = mq->data;
1774         struct mmc_packed *packed = mqrq->packed;
1775         bool do_rel_wr, do_data_tag;
1776         u32 *packed_cmd_hdr;
1777         u8 hdr_blocks;
1778         u8 i = 1;
1779
1780         BUG_ON(!packed);
1781
1782         mqrq->cmd_type = MMC_PACKED_WRITE;
1783         packed->blocks = 0;
1784         packed->idx_failure = MMC_PACKED_NR_IDX;
1785
1786         packed_cmd_hdr = packed->cmd_hdr;
1787         memset(packed_cmd_hdr, 0, sizeof(packed->cmd_hdr));
1788         packed_cmd_hdr[0] = (packed->nr_entries << 16) |
1789                 (PACKED_CMD_WR << 8) | PACKED_CMD_VER;
1790         hdr_blocks = mmc_large_sector(card) ? 8 : 1;
1791
1792         /*
1793          * Argument for each entry of packed group
1794          */
1795         list_for_each_entry(prq, &packed->list, queuelist) {
1796                 do_rel_wr = mmc_req_rel_wr(prq) && (md->flags & MMC_BLK_REL_WR);
1797                 do_data_tag = (card->ext_csd.data_tag_unit_size) &&
1798                         (prq->cmd_flags & REQ_META) &&
1799                         (rq_data_dir(prq) == WRITE) &&
1800                         ((brq->data.blocks * brq->data.blksz) >=
1801                          card->ext_csd.data_tag_unit_size);
1802                 /* Argument of CMD23 */
1803                 packed_cmd_hdr[(i * 2)] =
1804                         (do_rel_wr ? MMC_CMD23_ARG_REL_WR : 0) |
1805                         (do_data_tag ? MMC_CMD23_ARG_TAG_REQ : 0) |
1806                         blk_rq_sectors(prq);
1807                 /* Argument of CMD18 or CMD25 */
1808                 packed_cmd_hdr[((i * 2)) + 1] =
1809                         mmc_card_blockaddr(card) ?
1810                         blk_rq_pos(prq) : blk_rq_pos(prq) << 9;
1811                 packed->blocks += blk_rq_sectors(prq);
1812                 i++;
1813         }
1814
1815         memset(brq, 0, sizeof(struct mmc_blk_request));
1816         brq->mrq.cmd = &brq->cmd;
1817         brq->mrq.data = &brq->data;
1818         brq->mrq.sbc = &brq->sbc;
1819         brq->mrq.stop = &brq->stop;
1820
1821         brq->sbc.opcode = MMC_SET_BLOCK_COUNT;
1822         brq->sbc.arg = MMC_CMD23_ARG_PACKED | (packed->blocks + hdr_blocks);
1823         brq->sbc.flags = MMC_RSP_R1 | MMC_CMD_AC;
1824
1825         brq->cmd.opcode = MMC_WRITE_MULTIPLE_BLOCK;
1826         brq->cmd.arg = blk_rq_pos(req);
1827         if (!mmc_card_blockaddr(card))
1828                 brq->cmd.arg <<= 9;
1829         brq->cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC;
1830
1831         brq->data.blksz = 512;
1832         brq->data.blocks = packed->blocks + hdr_blocks;
1833         brq->data.flags = MMC_DATA_WRITE;
1834
1835         brq->stop.opcode = MMC_STOP_TRANSMISSION;
1836         brq->stop.arg = 0;
1837         brq->stop.flags = MMC_RSP_SPI_R1B | MMC_RSP_R1B | MMC_CMD_AC;
1838
1839         mmc_set_data_timeout(&brq->data, card);
1840
1841         brq->data.sg = mqrq->sg;
1842         brq->data.sg_len = mmc_queue_map_sg(mq, mqrq);
1843
1844         mqrq->mmc_active.mrq = &brq->mrq;
1845         mqrq->mmc_active.err_check = mmc_blk_packed_err_check;
1846
1847         mmc_queue_bounce_pre(mqrq);
1848 }
1849
1850 static int mmc_blk_cmd_err(struct mmc_blk_data *md, struct mmc_card *card,
1851                            struct mmc_blk_request *brq, struct request *req,
1852                            int ret)
1853 {
1854         struct mmc_queue_req *mq_rq;
1855         mq_rq = container_of(brq, struct mmc_queue_req, brq);
1856
1857         /*
1858          * If this is an SD card and we're writing, we can first
1859          * mark the known good sectors as ok.
1860          *
1861          * If the card is not SD, we can still ok written sectors
1862          * as reported by the controller (which might be less than
1863          * the real number of written sectors, but never more).
1864          */
1865         if (mmc_card_sd(card)) {
1866                 u32 blocks;
1867
1868                 blocks = mmc_sd_num_wr_blocks(card);
1869                 if (blocks != (u32)-1) {
1870                         ret = blk_end_request(req, 0, blocks << 9);
1871                 }
1872         } else {
1873                 if (!mmc_packed_cmd(mq_rq->cmd_type))
1874                         ret = blk_end_request(req, 0, brq->data.bytes_xfered);
1875         }
1876         return ret;
1877 }
1878
1879 static int mmc_blk_end_packed_req(struct mmc_queue_req *mq_rq)
1880 {
1881         struct request *prq;
1882         struct mmc_packed *packed = mq_rq->packed;
1883         int idx = packed->idx_failure, i = 0;
1884         int ret = 0;
1885
1886         BUG_ON(!packed);
1887
1888         while (!list_empty(&packed->list)) {
1889                 prq = list_entry_rq(packed->list.next);
1890                 if (idx == i) {
1891                         /* retry from error index */
1892                         packed->nr_entries -= idx;
1893                         mq_rq->req = prq;
1894                         ret = 1;
1895
1896                         if (packed->nr_entries == MMC_PACKED_NR_SINGLE) {
1897                                 list_del_init(&prq->queuelist);
1898                                 mmc_blk_clear_packed(mq_rq);
1899                         }
1900                         return ret;
1901                 }
1902                 list_del_init(&prq->queuelist);
1903                 blk_end_request(prq, 0, blk_rq_bytes(prq));
1904                 i++;
1905         }
1906
1907         mmc_blk_clear_packed(mq_rq);
1908         return ret;
1909 }
1910
1911 static void mmc_blk_abort_packed_req(struct mmc_queue_req *mq_rq)
1912 {
1913         struct request *prq;
1914         struct mmc_packed *packed = mq_rq->packed;
1915
1916         BUG_ON(!packed);
1917
1918         while (!list_empty(&packed->list)) {
1919                 prq = list_entry_rq(packed->list.next);
1920                 list_del_init(&prq->queuelist);
1921                 blk_end_request(prq, -EIO, blk_rq_bytes(prq));
1922         }
1923
1924         mmc_blk_clear_packed(mq_rq);
1925 }
1926
1927 static void mmc_blk_revert_packed_req(struct mmc_queue *mq,
1928                                       struct mmc_queue_req *mq_rq)
1929 {
1930         struct request *prq;
1931         struct request_queue *q = mq->queue;
1932         struct mmc_packed *packed = mq_rq->packed;
1933
1934         BUG_ON(!packed);
1935
1936         while (!list_empty(&packed->list)) {
1937                 prq = list_entry_rq(packed->list.prev);
1938                 if (prq->queuelist.prev != &packed->list) {
1939                         list_del_init(&prq->queuelist);
1940                         spin_lock_irq(q->queue_lock);
1941                         blk_requeue_request(mq->queue, prq);
1942                         spin_unlock_irq(q->queue_lock);
1943                 } else {
1944                         list_del_init(&prq->queuelist);
1945                 }
1946         }
1947
1948         mmc_blk_clear_packed(mq_rq);
1949 }
1950
1951 static int mmc_blk_issue_rw_rq(struct mmc_queue *mq, struct request *rqc)
1952 {
1953         struct mmc_blk_data *md = mq->data;
1954         struct mmc_card *card = md->queue.card;
1955         struct mmc_blk_request *brq = &mq->mqrq_cur->brq;
1956         int ret = 1, disable_multi = 0, retry = 0, type, retune_retry_done = 0;
1957         enum mmc_blk_status status;
1958         struct mmc_queue_req *mq_rq;
1959         struct request *req = rqc;
1960         struct mmc_async_req *areq;
1961         const u8 packed_nr = 2;
1962         u8 reqs = 0;
1963
1964         if (!rqc && !mq->mqrq_prev->req)
1965                 return 0;
1966
1967         if (rqc)
1968                 reqs = mmc_blk_prep_packed_list(mq, rqc);
1969
1970         do {
1971                 if (rqc) {
1972                         /*
1973                          * When 4KB native sector is enabled, only 8 blocks
1974                          * multiple read or write is allowed
1975                          */
1976                         if ((brq->data.blocks & 0x07) &&
1977                             (card->ext_csd.data_sector_size == 4096)) {
1978                                 pr_err("%s: Transfer size is not 4KB sector size aligned\n",
1979                                         req->rq_disk->disk_name);
1980                                 mq_rq = mq->mqrq_cur;
1981                                 goto cmd_abort;
1982                         }
1983
1984                         if (reqs >= packed_nr)
1985                                 mmc_blk_packed_hdr_wrq_prep(mq->mqrq_cur,
1986                                                             card, mq);
1987                         else
1988                                 mmc_blk_rw_rq_prep(mq->mqrq_cur, card, 0, mq);
1989                         areq = &mq->mqrq_cur->mmc_active;
1990                 } else
1991                         areq = NULL;
1992                 areq = mmc_start_req(card->host, areq, (int *) &status);
1993                 if (!areq) {
1994                         if (status == MMC_BLK_NEW_REQUEST)
1995                                 mq->flags |= MMC_QUEUE_NEW_REQUEST;
1996                         return 0;
1997                 }
1998
1999                 mq_rq = container_of(areq, struct mmc_queue_req, mmc_active);
2000                 brq = &mq_rq->brq;
2001                 req = mq_rq->req;
2002                 type = rq_data_dir(req) == READ ? MMC_BLK_READ : MMC_BLK_WRITE;
2003                 mmc_queue_bounce_post(mq_rq);
2004
2005                 switch (status) {
2006                 case MMC_BLK_SUCCESS:
2007                 case MMC_BLK_PARTIAL:
2008                         /*
2009                          * A block was successfully transferred.
2010                          */
2011                         mmc_blk_reset_success(md, type);
2012
2013                         if (mmc_packed_cmd(mq_rq->cmd_type)) {
2014                                 ret = mmc_blk_end_packed_req(mq_rq);
2015                                 break;
2016                         } else {
2017                                 ret = blk_end_request(req, 0,
2018                                                 brq->data.bytes_xfered);
2019                         }
2020
2021                         /*
2022                          * If the blk_end_request function returns non-zero even
2023                          * though all data has been transferred and no errors
2024                          * were returned by the host controller, it's a bug.
2025                          */
2026                         if (status == MMC_BLK_SUCCESS && ret) {
2027                                 pr_err("%s BUG rq_tot %d d_xfer %d\n",
2028                                        __func__, blk_rq_bytes(req),
2029                                        brq->data.bytes_xfered);
2030                                 rqc = NULL;
2031                                 goto cmd_abort;
2032                         }
2033                         break;
2034                 case MMC_BLK_CMD_ERR:
2035                         ret = mmc_blk_cmd_err(md, card, brq, req, ret);
2036                         if (mmc_blk_reset(md, card->host, type))
2037                                 goto cmd_abort;
2038                         if (!ret)
2039                                 goto start_new_req;
2040                         break;
2041                 case MMC_BLK_RETRY:
2042                         retune_retry_done = brq->retune_retry_done;
2043                         if (retry++ < 5)
2044                                 break;
2045                         /* Fall through */
2046                 case MMC_BLK_ABORT:
2047                         if (!mmc_blk_reset(md, card->host, type))
2048                                 break;
2049                         goto cmd_abort;
2050                 case MMC_BLK_DATA_ERR: {
2051                         int err;
2052
2053                         err = mmc_blk_reset(md, card->host, type);
2054                         if (!err)
2055                                 break;
2056                         if (err == -ENODEV ||
2057                                 mmc_packed_cmd(mq_rq->cmd_type))
2058                                 goto cmd_abort;
2059                         /* Fall through */
2060                 }
2061                 case MMC_BLK_ECC_ERR:
2062                         if (brq->data.blocks > 1) {
2063                                 /* Redo read one sector at a time */
2064                                 pr_warn("%s: retrying using single block read\n",
2065                                         req->rq_disk->disk_name);
2066                                 disable_multi = 1;
2067                                 break;
2068                         }
2069                         /*
2070                          * After an error, we redo I/O one sector at a
2071                          * time, so we only reach here after trying to
2072                          * read a single sector.
2073                          */
2074                         ret = blk_end_request(req, -EIO,
2075                                                 brq->data.blksz);
2076                         if (!ret)
2077                                 goto start_new_req;
2078                         break;
2079                 case MMC_BLK_NOMEDIUM:
2080                         goto cmd_abort;
2081                 default:
2082                         pr_err("%s: Unhandled return value (%d)",
2083                                         req->rq_disk->disk_name, status);
2084                         goto cmd_abort;
2085                 }
2086
2087                 if (ret) {
2088                         if (mmc_packed_cmd(mq_rq->cmd_type)) {
2089                                 if (!mq_rq->packed->retries)
2090                                         goto cmd_abort;
2091                                 mmc_blk_packed_hdr_wrq_prep(mq_rq, card, mq);
2092                                 mmc_start_req(card->host,
2093                                               &mq_rq->mmc_active, NULL);
2094                         } else {
2095
2096                                 /*
2097                                  * In case of a incomplete request
2098                                  * prepare it again and resend.
2099                                  */
2100                                 mmc_blk_rw_rq_prep(mq_rq, card,
2101                                                 disable_multi, mq);
2102                                 mmc_start_req(card->host,
2103                                                 &mq_rq->mmc_active, NULL);
2104                         }
2105                         mq_rq->brq.retune_retry_done = retune_retry_done;
2106                 }
2107         } while (ret);
2108
2109         return 1;
2110
2111  cmd_abort:
2112         if (mmc_packed_cmd(mq_rq->cmd_type)) {
2113                 mmc_blk_abort_packed_req(mq_rq);
2114         } else {
2115                 if (mmc_card_removed(card))
2116                         req->cmd_flags |= REQ_QUIET;
2117                 while (ret)
2118                         ret = blk_end_request(req, -EIO,
2119                                         blk_rq_cur_bytes(req));
2120         }
2121
2122  start_new_req:
2123         if (rqc) {
2124                 if (mmc_card_removed(card)) {
2125                         rqc->cmd_flags |= REQ_QUIET;
2126                         blk_end_request_all(rqc, -EIO);
2127                 } else {
2128                         /*
2129                          * If current request is packed, it needs to put back.
2130                          */
2131                         if (mmc_packed_cmd(mq->mqrq_cur->cmd_type))
2132                                 mmc_blk_revert_packed_req(mq, mq->mqrq_cur);
2133
2134                         mmc_blk_rw_rq_prep(mq->mqrq_cur, card, 0, mq);
2135                         mmc_start_req(card->host,
2136                                       &mq->mqrq_cur->mmc_active, NULL);
2137                 }
2138         }
2139
2140         return 0;
2141 }
2142
2143 static int mmc_blk_issue_rq(struct mmc_queue *mq, struct request *req)
2144 {
2145         int ret;
2146         struct mmc_blk_data *md = mq->data;
2147         struct mmc_card *card = md->queue.card;
2148         struct mmc_host *host = card->host;
2149         unsigned long flags;
2150         unsigned int cmd_flags = req ? req->cmd_flags : 0;
2151
2152         if (req && !mq->mqrq_prev->req)
2153                 /* claim host only for the first request */
2154                 mmc_get_card(card);
2155
2156         ret = mmc_blk_part_switch(card, md);
2157         if (ret) {
2158                 if (req) {
2159                         blk_end_request_all(req, -EIO);
2160                 }
2161                 ret = 0;
2162                 goto out;
2163         }
2164
2165         mq->flags &= ~MMC_QUEUE_NEW_REQUEST;
2166         if (req && req_op(req) == REQ_OP_DISCARD) {
2167                 /* complete ongoing async transfer before issuing discard */
2168                 if (card->host->areq)
2169                         mmc_blk_issue_rw_rq(mq, NULL);
2170                 if (req->cmd_flags & REQ_SECURE)
2171                         ret = mmc_blk_issue_secdiscard_rq(mq, req);
2172                 else
2173                         ret = mmc_blk_issue_discard_rq(mq, req);
2174         } else if (cmd_flags & REQ_FLUSH) {
2175                 /* complete ongoing async transfer before issuing flush */
2176                 if (card->host->areq)
2177                         mmc_blk_issue_rw_rq(mq, NULL);
2178                 ret = mmc_blk_issue_flush(mq, req);
2179         } else {
2180                 if (!req && host->areq) {
2181                         spin_lock_irqsave(&host->context_info.lock, flags);
2182                         host->context_info.is_waiting_last_req = true;
2183                         spin_unlock_irqrestore(&host->context_info.lock, flags);
2184                 }
2185                 ret = mmc_blk_issue_rw_rq(mq, req);
2186         }
2187
2188 out:
2189         if ((!req && !(mq->flags & MMC_QUEUE_NEW_REQUEST)) ||
2190             mmc_req_is_special(req))
2191                 /*
2192                  * Release host when there are no more requests
2193                  * and after special request(discard, flush) is done.
2194                  * In case sepecial request, there is no reentry to
2195                  * the 'mmc_blk_issue_rq' with 'mqrq_prev->req'.
2196                  */
2197                 mmc_put_card(card);
2198         return ret;
2199 }
2200
2201 static inline int mmc_blk_readonly(struct mmc_card *card)
2202 {
2203         return mmc_card_readonly(card) ||
2204                !(card->csd.cmdclass & CCC_BLOCK_WRITE);
2205 }
2206
2207 static struct mmc_blk_data *mmc_blk_alloc_req(struct mmc_card *card,
2208                                               struct device *parent,
2209                                               sector_t size,
2210                                               bool default_ro,
2211                                               const char *subname,
2212                                               int area_type)
2213 {
2214         struct mmc_blk_data *md;
2215         int devidx, ret;
2216
2217 again:
2218         if (!ida_pre_get(&mmc_blk_ida, GFP_KERNEL))
2219                 return ERR_PTR(-ENOMEM);
2220
2221         spin_lock(&mmc_blk_lock);
2222         ret = ida_get_new(&mmc_blk_ida, &devidx);
2223         spin_unlock(&mmc_blk_lock);
2224
2225         if (ret == -EAGAIN)
2226                 goto again;
2227         else if (ret)
2228                 return ERR_PTR(ret);
2229
2230         if (devidx >= max_devices) {
2231                 ret = -ENOSPC;
2232                 goto out;
2233         }
2234
2235         md = kzalloc(sizeof(struct mmc_blk_data), GFP_KERNEL);
2236         if (!md) {
2237                 ret = -ENOMEM;
2238                 goto out;
2239         }
2240
2241         md->area_type = area_type;
2242
2243         /*
2244          * Set the read-only status based on the supported commands
2245          * and the write protect switch.
2246          */
2247         md->read_only = mmc_blk_readonly(card);
2248
2249         md->disk = alloc_disk(perdev_minors);
2250         if (md->disk == NULL) {
2251                 ret = -ENOMEM;
2252                 goto err_kfree;
2253         }
2254
2255         spin_lock_init(&md->lock);
2256         INIT_LIST_HEAD(&md->part);
2257         md->usage = 1;
2258
2259         ret = mmc_init_queue(&md->queue, card, &md->lock, subname);
2260         if (ret)
2261                 goto err_putdisk;
2262
2263         md->queue.issue_fn = mmc_blk_issue_rq;
2264         md->queue.data = md;
2265
2266         md->disk->major = MMC_BLOCK_MAJOR;
2267         md->disk->first_minor = devidx * perdev_minors;
2268         md->disk->fops = &mmc_bdops;
2269         md->disk->private_data = md;
2270         md->disk->queue = md->queue.queue;
2271         md->disk->driverfs_dev = parent;
2272         set_disk_ro(md->disk, md->read_only || default_ro);
2273         md->disk->flags = GENHD_FL_EXT_DEVT;
2274         if (area_type & (MMC_BLK_DATA_AREA_RPMB | MMC_BLK_DATA_AREA_BOOT))
2275                 md->disk->flags |= GENHD_FL_NO_PART_SCAN;
2276
2277         /*
2278          * As discussed on lkml, GENHD_FL_REMOVABLE should:
2279          *
2280          * - be set for removable media with permanent block devices
2281          * - be unset for removable block devices with permanent media
2282          *
2283          * Since MMC block devices clearly fall under the second
2284          * case, we do not set GENHD_FL_REMOVABLE.  Userspace
2285          * should use the block device creation/destruction hotplug
2286          * messages to tell when the card is present.
2287          */
2288
2289         snprintf(md->disk->disk_name, sizeof(md->disk->disk_name),
2290                  "mmcblk%u%s", card->host->index, subname ? subname : "");
2291
2292         if (mmc_card_mmc(card))
2293                 blk_queue_logical_block_size(md->queue.queue,
2294                                              card->ext_csd.data_sector_size);
2295         else
2296                 blk_queue_logical_block_size(md->queue.queue, 512);
2297
2298         set_capacity(md->disk, size);
2299
2300         if (mmc_host_cmd23(card->host)) {
2301                 if (mmc_card_mmc(card) ||
2302                     (mmc_card_sd(card) &&
2303                      card->scr.cmds & SD_SCR_CMD23_SUPPORT))
2304                         md->flags |= MMC_BLK_CMD23;
2305         }
2306
2307         if (mmc_card_mmc(card) &&
2308             md->flags & MMC_BLK_CMD23 &&
2309             ((card->ext_csd.rel_param & EXT_CSD_WR_REL_PARAM_EN) ||
2310              card->ext_csd.rel_sectors)) {
2311                 md->flags |= MMC_BLK_REL_WR;
2312                 blk_queue_write_cache(md->queue.queue, true, true);
2313         }
2314
2315         if (mmc_card_mmc(card) &&
2316             (area_type == MMC_BLK_DATA_AREA_MAIN) &&
2317             (md->flags & MMC_BLK_CMD23) &&
2318             card->ext_csd.packed_event_en) {
2319                 if (!mmc_packed_init(&md->queue, card))
2320                         md->flags |= MMC_BLK_PACKED_CMD;
2321         }
2322
2323         return md;
2324
2325  err_putdisk:
2326         put_disk(md->disk);
2327  err_kfree:
2328         kfree(md);
2329  out:
2330         spin_lock(&mmc_blk_lock);
2331         ida_remove(&mmc_blk_ida, devidx);
2332         spin_unlock(&mmc_blk_lock);
2333         return ERR_PTR(ret);
2334 }
2335
2336 static struct mmc_blk_data *mmc_blk_alloc(struct mmc_card *card)
2337 {
2338         sector_t size;
2339
2340         if (!mmc_card_sd(card) && mmc_card_blockaddr(card)) {
2341                 /*
2342                  * The EXT_CSD sector count is in number or 512 byte
2343                  * sectors.
2344                  */
2345                 size = card->ext_csd.sectors;
2346         } else {
2347                 /*
2348                  * The CSD capacity field is in units of read_blkbits.
2349                  * set_capacity takes units of 512 bytes.
2350                  */
2351                 size = (typeof(sector_t))card->csd.capacity
2352                         << (card->csd.read_blkbits - 9);
2353         }
2354
2355         return mmc_blk_alloc_req(card, &card->dev, size, false, NULL,
2356                                         MMC_BLK_DATA_AREA_MAIN);
2357 }
2358
2359 static int mmc_blk_alloc_part(struct mmc_card *card,
2360                               struct mmc_blk_data *md,
2361                               unsigned int part_type,
2362                               sector_t size,
2363                               bool default_ro,
2364                               const char *subname,
2365                               int area_type)
2366 {
2367         char cap_str[10];
2368         struct mmc_blk_data *part_md;
2369
2370         part_md = mmc_blk_alloc_req(card, disk_to_dev(md->disk), size, default_ro,
2371                                     subname, area_type);
2372         if (IS_ERR(part_md))
2373                 return PTR_ERR(part_md);
2374         part_md->part_type = part_type;
2375         list_add(&part_md->part, &md->part);
2376
2377         string_get_size((u64)get_capacity(part_md->disk), 512, STRING_UNITS_2,
2378                         cap_str, sizeof(cap_str));
2379         pr_info("%s: %s %s partition %u %s\n",
2380                part_md->disk->disk_name, mmc_card_id(card),
2381                mmc_card_name(card), part_md->part_type, cap_str);
2382         return 0;
2383 }
2384
2385 /* MMC Physical partitions consist of two boot partitions and
2386  * up to four general purpose partitions.
2387  * For each partition enabled in EXT_CSD a block device will be allocatedi
2388  * to provide access to the partition.
2389  */
2390
2391 static int mmc_blk_alloc_parts(struct mmc_card *card, struct mmc_blk_data *md)
2392 {
2393         int idx, ret = 0;
2394
2395         if (!mmc_card_mmc(card))
2396                 return 0;
2397
2398         for (idx = 0; idx < card->nr_parts; idx++) {
2399                 if (card->part[idx].size) {
2400                         ret = mmc_blk_alloc_part(card, md,
2401                                 card->part[idx].part_cfg,
2402                                 card->part[idx].size >> 9,
2403                                 card->part[idx].force_ro,
2404                                 card->part[idx].name,
2405                                 card->part[idx].area_type);
2406                         if (ret)
2407                                 return ret;
2408                 }
2409         }
2410
2411         return ret;
2412 }
2413
2414 static void mmc_blk_remove_req(struct mmc_blk_data *md)
2415 {
2416         struct mmc_card *card;
2417
2418         if (md) {
2419                 /*
2420                  * Flush remaining requests and free queues. It
2421                  * is freeing the queue that stops new requests
2422                  * from being accepted.
2423                  */
2424                 card = md->queue.card;
2425                 mmc_cleanup_queue(&md->queue);
2426                 if (md->flags & MMC_BLK_PACKED_CMD)
2427                         mmc_packed_clean(&md->queue);
2428                 if (md->disk->flags & GENHD_FL_UP) {
2429                         device_remove_file(disk_to_dev(md->disk), &md->force_ro);
2430                         if ((md->area_type & MMC_BLK_DATA_AREA_BOOT) &&
2431                                         card->ext_csd.boot_ro_lockable)
2432                                 device_remove_file(disk_to_dev(md->disk),
2433                                         &md->power_ro_lock);
2434
2435                         del_gendisk(md->disk);
2436                 }
2437                 mmc_blk_put(md);
2438         }
2439 }
2440
2441 static void mmc_blk_remove_parts(struct mmc_card *card,
2442                                  struct mmc_blk_data *md)
2443 {
2444         struct list_head *pos, *q;
2445         struct mmc_blk_data *part_md;
2446
2447         list_for_each_safe(pos, q, &md->part) {
2448                 part_md = list_entry(pos, struct mmc_blk_data, part);
2449                 list_del(pos);
2450                 mmc_blk_remove_req(part_md);
2451         }
2452 }
2453
2454 static int mmc_add_disk(struct mmc_blk_data *md)
2455 {
2456         int ret;
2457         struct mmc_card *card = md->queue.card;
2458
2459         add_disk(md->disk);
2460         md->force_ro.show = force_ro_show;
2461         md->force_ro.store = force_ro_store;
2462         sysfs_attr_init(&md->force_ro.attr);
2463         md->force_ro.attr.name = "force_ro";
2464         md->force_ro.attr.mode = S_IRUGO | S_IWUSR;
2465         ret = device_create_file(disk_to_dev(md->disk), &md->force_ro);
2466         if (ret)
2467                 goto force_ro_fail;
2468
2469         if ((md->area_type & MMC_BLK_DATA_AREA_BOOT) &&
2470              card->ext_csd.boot_ro_lockable) {
2471                 umode_t mode;
2472
2473                 if (card->ext_csd.boot_ro_lock & EXT_CSD_BOOT_WP_B_PWR_WP_DIS)
2474                         mode = S_IRUGO;
2475                 else
2476                         mode = S_IRUGO | S_IWUSR;
2477
2478                 md->power_ro_lock.show = power_ro_lock_show;
2479                 md->power_ro_lock.store = power_ro_lock_store;
2480                 sysfs_attr_init(&md->power_ro_lock.attr);
2481                 md->power_ro_lock.attr.mode = mode;
2482                 md->power_ro_lock.attr.name =
2483                                         "ro_lock_until_next_power_on";
2484                 ret = device_create_file(disk_to_dev(md->disk),
2485                                 &md->power_ro_lock);
2486                 if (ret)
2487                         goto power_ro_lock_fail;
2488         }
2489         return ret;
2490
2491 power_ro_lock_fail:
2492         device_remove_file(disk_to_dev(md->disk), &md->force_ro);
2493 force_ro_fail:
2494         del_gendisk(md->disk);
2495
2496         return ret;
2497 }
2498
2499 #define CID_MANFID_SANDISK      0x2
2500 #define CID_MANFID_TOSHIBA      0x11
2501 #define CID_MANFID_MICRON       0x13
2502 #define CID_MANFID_SAMSUNG      0x15
2503 #define CID_MANFID_KINGSTON     0x70
2504
2505 static const struct mmc_fixup blk_fixups[] =
2506 {
2507         MMC_FIXUP("SEM02G", CID_MANFID_SANDISK, 0x100, add_quirk,
2508                   MMC_QUIRK_INAND_CMD38),
2509         MMC_FIXUP("SEM04G", CID_MANFID_SANDISK, 0x100, add_quirk,
2510                   MMC_QUIRK_INAND_CMD38),
2511         MMC_FIXUP("SEM08G", CID_MANFID_SANDISK, 0x100, add_quirk,
2512                   MMC_QUIRK_INAND_CMD38),
2513         MMC_FIXUP("SEM16G", CID_MANFID_SANDISK, 0x100, add_quirk,
2514                   MMC_QUIRK_INAND_CMD38),
2515         MMC_FIXUP("SEM32G", CID_MANFID_SANDISK, 0x100, add_quirk,
2516                   MMC_QUIRK_INAND_CMD38),
2517
2518         /*
2519          * Some MMC cards experience performance degradation with CMD23
2520          * instead of CMD12-bounded multiblock transfers. For now we'll
2521          * black list what's bad...
2522          * - Certain Toshiba cards.
2523          *
2524          * N.B. This doesn't affect SD cards.
2525          */
2526         MMC_FIXUP("SDMB-32", CID_MANFID_SANDISK, CID_OEMID_ANY, add_quirk_mmc,
2527                   MMC_QUIRK_BLK_NO_CMD23),
2528         MMC_FIXUP("SDM032", CID_MANFID_SANDISK, CID_OEMID_ANY, add_quirk_mmc,
2529                   MMC_QUIRK_BLK_NO_CMD23),
2530         MMC_FIXUP("MMC08G", CID_MANFID_TOSHIBA, CID_OEMID_ANY, add_quirk_mmc,
2531                   MMC_QUIRK_BLK_NO_CMD23),
2532         MMC_FIXUP("MMC16G", CID_MANFID_TOSHIBA, CID_OEMID_ANY, add_quirk_mmc,
2533                   MMC_QUIRK_BLK_NO_CMD23),
2534         MMC_FIXUP("MMC32G", CID_MANFID_TOSHIBA, CID_OEMID_ANY, add_quirk_mmc,
2535                   MMC_QUIRK_BLK_NO_CMD23),
2536
2537         /*
2538          * Some MMC cards need longer data read timeout than indicated in CSD.
2539          */
2540         MMC_FIXUP(CID_NAME_ANY, CID_MANFID_MICRON, 0x200, add_quirk_mmc,
2541                   MMC_QUIRK_LONG_READ_TIME),
2542         MMC_FIXUP("008GE0", CID_MANFID_TOSHIBA, CID_OEMID_ANY, add_quirk_mmc,
2543                   MMC_QUIRK_LONG_READ_TIME),
2544
2545         /*
2546          * On these Samsung MoviNAND parts, performing secure erase or
2547          * secure trim can result in unrecoverable corruption due to a
2548          * firmware bug.
2549          */
2550         MMC_FIXUP("M8G2FA", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2551                   MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2552         MMC_FIXUP("MAG4FA", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2553                   MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2554         MMC_FIXUP("MBG8FA", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2555                   MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2556         MMC_FIXUP("MCGAFA", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2557                   MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2558         MMC_FIXUP("VAL00M", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2559                   MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2560         MMC_FIXUP("VYL00M", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2561                   MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2562         MMC_FIXUP("KYL00M", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2563                   MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2564         MMC_FIXUP("VZL00M", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2565                   MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2566
2567         /*
2568          *  On Some Kingston eMMCs, performing trim can result in
2569          *  unrecoverable data conrruption occasionally due to a firmware bug.
2570          */
2571         MMC_FIXUP("V10008", CID_MANFID_KINGSTON, CID_OEMID_ANY, add_quirk_mmc,
2572                   MMC_QUIRK_TRIM_BROKEN),
2573         MMC_FIXUP("V10016", CID_MANFID_KINGSTON, CID_OEMID_ANY, add_quirk_mmc,
2574                   MMC_QUIRK_TRIM_BROKEN),
2575
2576         END_FIXUP
2577 };
2578
2579 static int mmc_blk_probe(struct mmc_card *card)
2580 {
2581         struct mmc_blk_data *md, *part_md;
2582         char cap_str[10];
2583
2584         /*
2585          * Check that the card supports the command class(es) we need.
2586          */
2587         if (!(card->csd.cmdclass & CCC_BLOCK_READ))
2588                 return -ENODEV;
2589
2590         mmc_fixup_device(card, blk_fixups);
2591
2592         md = mmc_blk_alloc(card);
2593         if (IS_ERR(md))
2594                 return PTR_ERR(md);
2595
2596         string_get_size((u64)get_capacity(md->disk), 512, STRING_UNITS_2,
2597                         cap_str, sizeof(cap_str));
2598         pr_info("%s: %s %s %s %s\n",
2599                 md->disk->disk_name, mmc_card_id(card), mmc_card_name(card),
2600                 cap_str, md->read_only ? "(ro)" : "");
2601
2602         if (mmc_blk_alloc_parts(card, md))
2603                 goto out;
2604
2605         dev_set_drvdata(&card->dev, md);
2606
2607         if (mmc_add_disk(md))
2608                 goto out;
2609
2610         list_for_each_entry(part_md, &md->part, part) {
2611                 if (mmc_add_disk(part_md))
2612                         goto out;
2613         }
2614
2615         pm_runtime_set_autosuspend_delay(&card->dev, 3000);
2616         pm_runtime_use_autosuspend(&card->dev);
2617
2618         /*
2619          * Don't enable runtime PM for SD-combo cards here. Leave that
2620          * decision to be taken during the SDIO init sequence instead.
2621          */
2622         if (card->type != MMC_TYPE_SD_COMBO) {
2623                 pm_runtime_set_active(&card->dev);
2624                 pm_runtime_enable(&card->dev);
2625         }
2626
2627         return 0;
2628
2629  out:
2630         mmc_blk_remove_parts(card, md);
2631         mmc_blk_remove_req(md);
2632         return 0;
2633 }
2634
2635 static void mmc_blk_remove(struct mmc_card *card)
2636 {
2637         struct mmc_blk_data *md = dev_get_drvdata(&card->dev);
2638
2639         mmc_blk_remove_parts(card, md);
2640         pm_runtime_get_sync(&card->dev);
2641         mmc_claim_host(card->host);
2642         mmc_blk_part_switch(card, md);
2643         mmc_release_host(card->host);
2644         if (card->type != MMC_TYPE_SD_COMBO)
2645                 pm_runtime_disable(&card->dev);
2646         pm_runtime_put_noidle(&card->dev);
2647         mmc_blk_remove_req(md);
2648         dev_set_drvdata(&card->dev, NULL);
2649 }
2650
2651 static int _mmc_blk_suspend(struct mmc_card *card)
2652 {
2653         struct mmc_blk_data *part_md;
2654         struct mmc_blk_data *md = dev_get_drvdata(&card->dev);
2655
2656         if (md) {
2657                 mmc_queue_suspend(&md->queue);
2658                 list_for_each_entry(part_md, &md->part, part) {
2659                         mmc_queue_suspend(&part_md->queue);
2660                 }
2661         }
2662         return 0;
2663 }
2664
2665 static void mmc_blk_shutdown(struct mmc_card *card)
2666 {
2667         _mmc_blk_suspend(card);
2668 }
2669
2670 #ifdef CONFIG_PM_SLEEP
2671 static int mmc_blk_suspend(struct device *dev)
2672 {
2673         struct mmc_card *card = mmc_dev_to_card(dev);
2674
2675         return _mmc_blk_suspend(card);
2676 }
2677
2678 static int mmc_blk_resume(struct device *dev)
2679 {
2680         struct mmc_blk_data *part_md;
2681         struct mmc_blk_data *md = dev_get_drvdata(dev);
2682
2683         if (md) {
2684                 /*
2685                  * Resume involves the card going into idle state,
2686                  * so current partition is always the main one.
2687                  */
2688                 md->part_curr = md->part_type;
2689                 mmc_queue_resume(&md->queue);
2690                 list_for_each_entry(part_md, &md->part, part) {
2691                         mmc_queue_resume(&part_md->queue);
2692                 }
2693         }
2694         return 0;
2695 }
2696 #endif
2697
2698 static SIMPLE_DEV_PM_OPS(mmc_blk_pm_ops, mmc_blk_suspend, mmc_blk_resume);
2699
2700 static struct mmc_driver mmc_driver = {
2701         .drv            = {
2702                 .name   = "mmcblk",
2703                 .pm     = &mmc_blk_pm_ops,
2704         },
2705         .probe          = mmc_blk_probe,
2706         .remove         = mmc_blk_remove,
2707         .shutdown       = mmc_blk_shutdown,
2708 };
2709
2710 static int __init mmc_blk_init(void)
2711 {
2712         int res;
2713
2714         if (perdev_minors != CONFIG_MMC_BLOCK_MINORS)
2715                 pr_info("mmcblk: using %d minors per device\n", perdev_minors);
2716
2717         max_devices = min(MAX_DEVICES, (1 << MINORBITS) / perdev_minors);
2718
2719         res = register_blkdev(MMC_BLOCK_MAJOR, "mmc");
2720         if (res)
2721                 goto out;
2722
2723         res = mmc_register_driver(&mmc_driver);
2724         if (res)
2725                 goto out2;
2726
2727         return 0;
2728  out2:
2729         unregister_blkdev(MMC_BLOCK_MAJOR, "mmc");
2730  out:
2731         return res;
2732 }
2733
2734 static void __exit mmc_blk_exit(void)
2735 {
2736         mmc_unregister_driver(&mmc_driver);
2737         unregister_blkdev(MMC_BLOCK_MAJOR, "mmc");
2738 }
2739
2740 module_init(mmc_blk_init);
2741 module_exit(mmc_blk_exit);
2742
2743 MODULE_LICENSE("GPL");
2744 MODULE_DESCRIPTION("Multimedia Card (MMC) block device driver");
2745