2 * Block driver for media (i.e., flash cards)
4 * Copyright 2002 Hewlett-Packard Company
5 * Copyright 2005-2008 Pierre Ossman
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.
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.
15 * Many thanks to Alessandro Rubini and Jonathan Corbet!
17 * Author: Andrew Christian
20 #include <linux/moduleparam.h>
21 #include <linux/module.h>
22 #include <linux/init.h>
24 #include <linux/kernel.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>
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>
46 #include <asm/uaccess.h>
50 MODULE_ALIAS("mmc:block");
51 #ifdef MODULE_PARAM_PREFIX
52 #undef MODULE_PARAM_PREFIX
54 #define MODULE_PARAM_PREFIX "mmcblk."
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)
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
71 static DEFINE_MUTEX(block_mutex);
74 * The defaults come from config options but can be overriden by module
77 static int perdev_minors = CONFIG_MMC_BLOCK_MINORS;
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.
84 static int max_devices;
86 #define MAX_DEVICES 256
88 static DEFINE_IDA(mmc_blk_ida);
89 static DEFINE_SPINLOCK(mmc_blk_lock);
92 * There is one mmc_blk_data per slot.
97 struct mmc_queue queue;
98 struct list_head part;
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 */
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)
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.
119 unsigned int part_curr;
120 struct device_attribute force_ro;
121 struct device_attribute power_ro_lock;
125 static DEFINE_MUTEX(open_lock);
128 MMC_PACKED_NR_IDX = -1,
130 MMC_PACKED_NR_SINGLE,
133 module_param(perdev_minors, int, 0444);
134 MODULE_PARM_DESC(perdev_minors, "Minors numbers to allocate per device");
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);
140 static inline void mmc_blk_clear_packed(struct mmc_queue_req *mqrq)
142 struct mmc_packed *packed = mqrq->packed;
146 mqrq->cmd_type = MMC_PACKED_NONE;
147 packed->nr_entries = MMC_PACKED_NR_ZERO;
148 packed->idx_failure = MMC_PACKED_NR_IDX;
153 static struct mmc_blk_data *mmc_blk_get(struct gendisk *disk)
155 struct mmc_blk_data *md;
157 mutex_lock(&open_lock);
158 md = disk->private_data;
159 if (md && md->usage == 0)
163 mutex_unlock(&open_lock);
168 static inline int mmc_get_devidx(struct gendisk *disk)
170 int devidx = disk->first_minor / perdev_minors;
174 static void mmc_blk_put(struct mmc_blk_data *md)
176 mutex_lock(&open_lock);
178 if (md->usage == 0) {
179 int devidx = mmc_get_devidx(md->disk);
180 blk_cleanup_queue(md->queue.queue);
182 spin_lock(&mmc_blk_lock);
183 ida_remove(&mmc_blk_ida, devidx);
184 spin_unlock(&mmc_blk_lock);
189 mutex_unlock(&open_lock);
192 static ssize_t power_ro_lock_show(struct device *dev,
193 struct device_attribute *attr, char *buf)
196 struct mmc_blk_data *md = mmc_blk_get(dev_to_disk(dev));
197 struct mmc_card *card = md->queue.card;
200 if (card->ext_csd.boot_ro_lock & EXT_CSD_BOOT_WP_B_PERM_WP_EN)
202 else if (card->ext_csd.boot_ro_lock & EXT_CSD_BOOT_WP_B_PWR_WP_EN)
205 ret = snprintf(buf, PAGE_SIZE, "%d\n", locked);
212 static ssize_t power_ro_lock_store(struct device *dev,
213 struct device_attribute *attr, const char *buf, size_t count)
216 struct mmc_blk_data *md, *part_md;
217 struct mmc_card *card;
220 if (kstrtoul(buf, 0, &set))
226 md = mmc_blk_get(dev_to_disk(dev));
227 card = md->queue.card;
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);
236 pr_err("%s: Locking boot partition ro until next power on failed: %d\n", md->disk->disk_name, ret);
238 card->ext_csd.boot_ro_lock |= EXT_CSD_BOOT_WP_B_PWR_WP_EN;
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);
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);
258 static ssize_t force_ro_show(struct device *dev, struct device_attribute *attr,
262 struct mmc_blk_data *md = mmc_blk_get(dev_to_disk(dev));
264 ret = snprintf(buf, PAGE_SIZE, "%d\n",
265 get_disk_ro(dev_to_disk(dev)) ^
271 static ssize_t force_ro_store(struct device *dev, struct device_attribute *attr,
272 const char *buf, size_t count)
276 struct mmc_blk_data *md = mmc_blk_get(dev_to_disk(dev));
277 unsigned long set = simple_strtoul(buf, &end, 0);
283 set_disk_ro(dev_to_disk(dev), set || md->read_only);
290 static int mmc_blk_open(struct block_device *bdev, fmode_t mode)
292 struct mmc_blk_data *md = mmc_blk_get(bdev->bd_disk);
295 mutex_lock(&block_mutex);
298 check_disk_change(bdev);
301 if ((mode & FMODE_WRITE) && md->read_only) {
306 mutex_unlock(&block_mutex);
311 static void mmc_blk_release(struct gendisk *disk, fmode_t mode)
313 struct mmc_blk_data *md = disk->private_data;
315 mutex_lock(&block_mutex);
317 mutex_unlock(&block_mutex);
321 mmc_blk_getgeo(struct block_device *bdev, struct hd_geometry *geo)
323 geo->cylinders = get_capacity(bdev->bd_disk) / (4 * 16);
329 struct mmc_blk_ioc_data {
330 struct mmc_ioc_cmd ic;
335 static struct mmc_blk_ioc_data *mmc_blk_ioctl_copy_from_user(
336 struct mmc_ioc_cmd __user *user)
338 struct mmc_blk_ioc_data *idata;
341 idata = kmalloc(sizeof(*idata), GFP_KERNEL);
347 if (copy_from_user(&idata->ic, user, sizeof(idata->ic))) {
352 idata->buf_bytes = (u64) idata->ic.blksz * idata->ic.blocks;
353 if (idata->buf_bytes > MMC_IOC_MAX_BYTES) {
358 if (!idata->buf_bytes)
361 idata->buf = kmalloc(idata->buf_bytes, GFP_KERNEL);
367 if (copy_from_user(idata->buf, (void __user *)(unsigned long)
368 idata->ic.data_ptr, idata->buf_bytes)) {
383 static int mmc_blk_ioctl_copy_to_user(struct mmc_ioc_cmd __user *ic_ptr,
384 struct mmc_blk_ioc_data *idata)
386 struct mmc_ioc_cmd *ic = &idata->ic;
388 if (copy_to_user(&(ic_ptr->response), ic->response,
389 sizeof(ic->response)))
392 if (!idata->ic.write_flag) {
393 if (copy_to_user((void __user *)(unsigned long)ic->data_ptr,
394 idata->buf, idata->buf_bytes))
401 static int ioctl_rpmb_card_status_poll(struct mmc_card *card, u32 *status,
407 if (!status || !retries_max)
411 err = get_card_status(card, status, 5);
415 if (!R1_STATUS(*status) &&
416 (R1_CURRENT_STATE(*status) != R1_STATE_PRG))
417 break; /* RPMB programming operation complete */
420 * Rechedule to give the MMC device a chance to continue
421 * processing the previous command without being polled too
424 usleep_range(1000, 5000);
425 } while (++retry_count < retries_max);
427 if (retry_count == retries_max)
433 static int ioctl_do_sanitize(struct mmc_card *card)
437 if (!mmc_can_sanitize(card)) {
438 pr_warn("%s: %s - SANITIZE is not supported\n",
439 mmc_hostname(card->host), __func__);
444 pr_debug("%s: %s - SANITIZE IN PROGRESS...\n",
445 mmc_hostname(card->host), __func__);
447 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
448 EXT_CSD_SANITIZE_START, 1,
449 MMC_SANITIZE_REQ_TIMEOUT);
452 pr_err("%s: %s - EXT_CSD_SANITIZE_START failed. err=%d\n",
453 mmc_hostname(card->host), __func__, err);
455 pr_debug("%s: %s - SANITIZE COMPLETED\n", mmc_hostname(card->host),
461 static int __mmc_blk_ioctl_cmd(struct mmc_card *card, struct mmc_blk_data *md,
462 struct mmc_blk_ioc_data *idata)
464 struct mmc_command cmd = {0};
465 struct mmc_data data = {0};
466 struct mmc_request mrq = {NULL};
467 struct scatterlist sg;
472 if (!card || !md || !idata)
475 if (md->area_type & MMC_BLK_DATA_AREA_RPMB)
478 cmd.opcode = idata->ic.opcode;
479 cmd.arg = idata->ic.arg;
480 cmd.flags = idata->ic.flags;
482 if (idata->buf_bytes) {
485 data.blksz = idata->ic.blksz;
486 data.blocks = idata->ic.blocks;
488 sg_init_one(data.sg, idata->buf, idata->buf_bytes);
490 if (idata->ic.write_flag)
491 data.flags = MMC_DATA_WRITE;
493 data.flags = MMC_DATA_READ;
495 /* data.flags must already be set before doing this. */
496 mmc_set_data_timeout(&data, card);
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;
502 if ((cmd.flags & MMC_RSP_R1B) == MMC_RSP_R1B) {
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
510 * cmd.cmd_timeout = idata->ic.cmd_timeout_ms;
512 data.timeout_ns = idata->ic.cmd_timeout_ms * 1000000;
520 err = mmc_blk_part_switch(card, md);
524 if (idata->ic.is_acmd) {
525 err = mmc_app_cmd(card->host, card);
531 err = mmc_set_blockcount(card, data.blocks,
532 idata->ic.write_flag & (1 << 31));
537 if ((MMC_EXTRACT_INDEX_FROM_ARG(cmd.arg) == EXT_CSD_SANITIZE_START) &&
538 (cmd.opcode == MMC_SWITCH)) {
539 err = ioctl_do_sanitize(card);
542 pr_err("%s: ioctl_do_sanitize() failed. err = %d",
548 mmc_wait_for_req(card->host, &mrq);
551 dev_err(mmc_dev(card->host), "%s: cmd error %d\n",
552 __func__, cmd.error);
556 dev_err(mmc_dev(card->host), "%s: data error %d\n",
557 __func__, data.error);
562 * According to the SD specs, some commands require a delay after
563 * issuing the command.
565 if (idata->ic.postsleep_min_us)
566 usleep_range(idata->ic.postsleep_min_us, idata->ic.postsleep_max_us);
568 memcpy(&(idata->ic.response), cmd.resp, sizeof(cmd.resp));
572 * Ensure RPMB command has completed by polling CMD13
575 err = ioctl_rpmb_card_status_poll(card, &status, 5);
577 dev_err(mmc_dev(card->host),
578 "%s: Card Status=0x%08X, error %d\n",
579 __func__, status, err);
585 static int mmc_blk_ioctl_cmd(struct block_device *bdev,
586 struct mmc_ioc_cmd __user *ic_ptr)
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;
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.
598 if ((!capable(CAP_SYS_RAWIO)) || (bdev != bdev->bd_contains))
601 idata = mmc_blk_ioctl_copy_from_user(ic_ptr);
603 return PTR_ERR(idata);
605 md = mmc_blk_get(bdev->bd_disk);
611 card = md->queue.card;
619 ioc_err = __mmc_blk_ioctl_cmd(card, md, idata);
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));
627 err = mmc_blk_ioctl_copy_to_user(ic_ptr, idata);
634 return ioc_err ? ioc_err : err;
637 static int mmc_blk_ioctl_multi_cmd(struct block_device *bdev,
638 struct mmc_ioc_multi_cmd __user *user)
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;
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.
652 if ((!capable(CAP_SYS_RAWIO)) || (bdev != bdev->bd_contains))
655 if (copy_from_user(&num_of_cmds, &user->num_of_cmds,
656 sizeof(num_of_cmds)))
659 if (num_of_cmds > MMC_IOC_MAX_CMDS)
662 idata = kcalloc(num_of_cmds, sizeof(*idata), GFP_KERNEL);
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]);
675 md = mmc_blk_get(bdev->bd_disk);
681 card = md->queue.card;
689 for (i = 0; i < num_of_cmds && !ioc_err; i++)
690 ioc_err = __mmc_blk_ioctl_cmd(card, md, idata[i]);
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));
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]);
705 for (i = 0; i < num_of_cmds; i++) {
706 kfree(idata[i]->buf);
710 return ioc_err ? ioc_err : err;
713 static int mmc_blk_ioctl(struct block_device *bdev, fmode_t mode,
714 unsigned int cmd, unsigned long arg)
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);
729 static int mmc_blk_compat_ioctl(struct block_device *bdev, fmode_t mode,
730 unsigned int cmd, unsigned long arg)
732 return mmc_blk_ioctl(bdev, mode, cmd, (unsigned long) compat_ptr(arg));
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,
743 .compat_ioctl = mmc_blk_compat_ioctl,
747 static inline int mmc_blk_part_switch(struct mmc_card *card,
748 struct mmc_blk_data *md)
751 struct mmc_blk_data *main_md = dev_get_drvdata(&card->dev);
753 if (main_md->part_curr == md->part_type)
756 if (mmc_card_mmc(card)) {
757 u8 part_config = card->ext_csd.part_config;
759 if (md->part_type == EXT_CSD_PART_CONFIG_ACC_RPMB)
760 mmc_retune_pause(card->host);
762 part_config &= ~EXT_CSD_PART_CONFIG_ACC_MASK;
763 part_config |= md->part_type;
765 ret = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
766 EXT_CSD_PART_CONFIG, part_config,
767 card->ext_csd.part_time);
769 if (md->part_type == EXT_CSD_PART_CONFIG_ACC_RPMB)
770 mmc_retune_unpause(card->host);
774 card->ext_csd.part_config = part_config;
776 if (main_md->part_curr == EXT_CSD_PART_CONFIG_ACC_RPMB)
777 mmc_retune_unpause(card->host);
780 main_md->part_curr = md->part_type;
784 static u32 mmc_sd_num_wr_blocks(struct mmc_card *card)
790 struct mmc_request mrq = {NULL};
791 struct mmc_command cmd = {0};
792 struct mmc_data data = {0};
794 struct scatterlist sg;
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;
800 err = mmc_wait_for_cmd(card->host, &cmd, 0);
803 if (!mmc_host_is_spi(card->host) && !(cmd.resp[0] & R1_APP_CMD))
806 memset(&cmd, 0, sizeof(struct mmc_command));
808 cmd.opcode = SD_APP_SEND_NUM_WR_BLKS;
810 cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC;
814 data.flags = MMC_DATA_READ;
817 mmc_set_data_timeout(&data, card);
822 blocks = kmalloc(4, GFP_KERNEL);
826 sg_init_one(&sg, blocks, 4);
828 mmc_wait_for_req(card->host, &mrq);
830 result = ntohl(*blocks);
833 if (cmd.error || data.error)
839 static int get_card_status(struct mmc_card *card, u32 *status, int retries)
841 struct mmc_command cmd = {0};
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);
850 *status = cmd.resp[0];
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)
857 unsigned long timeout = jiffies + msecs_to_jiffies(timeout_ms);
862 err = get_card_status(card, &status, 5);
864 pr_err("%s: error %d requesting status\n",
865 req->rq_disk->disk_name, err);
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);
875 /* We may rely on the host hw to handle busy detection.*/
876 if ((card->host->caps & MMC_CAP_WAIT_WHILE_BUSY) &&
881 * Timeout if the device never becomes ready for data and never
882 * leaves the program state.
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__);
892 * Some cards mishandle the status bits,
893 * so make sure to check both the busy
894 * indication and the card state.
896 } while (!(status & R1_READY_FOR_DATA) ||
897 (R1_CURRENT_STATE(status) == R1_STATE_PRG));
902 static int send_stop(struct mmc_card *card, unsigned int timeout_ms,
903 struct request *req, int *gen_err, u32 *stop_status)
905 struct mmc_host *host = card->host;
906 struct mmc_command cmd = {0};
908 bool use_r1b_resp = rq_data_dir(req) == WRITE;
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.
916 if (host->max_busy_timeout && (timeout_ms > host->max_busy_timeout))
917 use_r1b_resp = false;
919 cmd.opcode = MMC_STOP_TRANSMISSION;
921 cmd.flags = MMC_RSP_SPI_R1B | MMC_RSP_R1B | MMC_CMD_AC;
922 cmd.busy_timeout = timeout_ms;
924 cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC;
927 err = mmc_wait_for_cmd(host, &cmd, 5);
931 *stop_status = cmd.resp[0];
933 /* No need to check card status in case of READ. */
934 if (rq_data_dir(req) == READ)
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);
944 return card_busy_detect(card, timeout_ms, use_r1b_resp, req, gen_err);
947 #define ERR_NOMEDIUM 3
950 #define ERR_CONTINUE 0
952 static int mmc_blk_cmd_error(struct request *req, const char *name, int error,
953 bool status_valid, u32 status)
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",
964 pr_err("%s: %s sending %s command, card status %#x\n",
965 req->rq_disk->disk_name, "timed out", name, status);
967 /* If the status cmd initially failed, retry the r/w cmd */
969 pr_err("%s: status not valid, retrying timeout\n",
970 req->rq_disk->disk_name);
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.
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);
985 /* Otherwise abort the command */
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);
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.
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)
1017 bool prev_cmd_status_valid = true;
1018 u32 status, stop_status = 0;
1021 if (mmc_card_removed(card))
1022 return ERR_NOMEDIUM;
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.
1029 for (retry = 2; retry >= 0; retry--) {
1030 err = get_card_status(card, &status, 0);
1034 /* Re-tune if needed */
1035 mmc_retune_recheck(card->host);
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");
1042 /* We couldn't get a response from the card. Give up. */
1044 /* Check if the card is removed */
1045 if (mmc_detect_card_removed(card->host))
1046 return ERR_NOMEDIUM;
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))
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);
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.)
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);
1076 pr_err("%s: error %d sending stop command\n",
1077 req->rq_disk->disk_name, err);
1079 * If the stop cmd also timed out, the card is probably
1080 * not present, so abort. Other errors are bad news too.
1085 if (stop_status & R1_CARD_ECC_FAILED)
1089 /* Check for set block count errors */
1091 return mmc_blk_cmd_error(req, "SET_BLOCK_COUNT", brq->sbc.error,
1092 prev_cmd_status_valid, status);
1094 /* Check for r/w command errors */
1096 return mmc_blk_cmd_error(req, "r/w cmd", brq->cmd.error,
1097 prev_cmd_status_valid, status);
1100 if (!brq->stop.error)
1101 return ERR_CONTINUE;
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);
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.
1113 brq->stop.resp[0] = stop_status;
1114 brq->stop.error = 0;
1116 return ERR_CONTINUE;
1119 static int mmc_blk_reset(struct mmc_blk_data *md, struct mmc_host *host,
1124 if (md->reset_done & type)
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);
1135 main_md->part_curr = main_md->part_type;
1136 part_err = mmc_blk_part_switch(host->card, md);
1139 * We have failed to get back into the correct
1140 * partition, so we need to abort the whole request.
1148 static inline void mmc_blk_reset_success(struct mmc_blk_data *md, int type)
1150 md->reset_done &= ~type;
1153 int mmc_access_rpmb(struct mmc_queue *mq)
1155 struct mmc_blk_data *md = mq->data;
1157 * If this is a RPMB partition access, return ture
1159 if (md && md->part_type == EXT_CSD_PART_CONFIG_ACC_RPMB)
1165 static int mmc_blk_issue_discard_rq(struct mmc_queue *mq, struct request *req)
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;
1172 if (!mmc_can_erase(card)) {
1177 from = blk_rq_pos(req);
1178 nr = blk_rq_sectors(req);
1180 if (mmc_can_discard(card))
1181 arg = MMC_DISCARD_ARG;
1182 else if (mmc_can_trim(card))
1185 arg = MMC_ERASE_ARG;
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,
1197 err = mmc_erase(card, from, nr, arg);
1199 if (err == -EIO && !mmc_blk_reset(md, card->host, type))
1202 mmc_blk_reset_success(md, type);
1203 blk_end_request(req, err, blk_rq_bytes(req));
1208 static int mmc_blk_issue_secdiscard_rq(struct mmc_queue *mq,
1209 struct request *req)
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;
1216 if (!(mmc_can_secure_erase_trim(card))) {
1221 from = blk_rq_pos(req);
1222 nr = blk_rq_sectors(req);
1224 if (mmc_can_trim(card) && !mmc_erase_group_aligned(card, from, nr))
1225 arg = MMC_SECURE_TRIM1_ARG;
1227 arg = MMC_SECURE_ERASE_ARG;
1230 if (card->quirks & MMC_QUIRK_INAND_CMD38) {
1231 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1232 INAND_CMD38_ARG_EXT_CSD,
1233 arg == MMC_SECURE_TRIM1_ARG ?
1234 INAND_CMD38_ARG_SECTRIM1 :
1235 INAND_CMD38_ARG_SECERASE,
1241 err = mmc_erase(card, from, nr, arg);
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,
1257 err = mmc_erase(card, from, nr, MMC_SECURE_TRIM2_ARG);
1265 if (err && !mmc_blk_reset(md, card->host, type))
1268 mmc_blk_reset_success(md, type);
1270 blk_end_request(req, err, blk_rq_bytes(req));
1275 static int mmc_blk_issue_flush(struct mmc_queue *mq, struct request *req)
1277 struct mmc_blk_data *md = mq->data;
1278 struct mmc_card *card = md->queue.card;
1281 ret = mmc_flush_cache(card);
1285 blk_end_request_all(req, ret);
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.
1297 static inline void mmc_apply_rel_rw(struct mmc_blk_request *brq,
1298 struct mmc_card *card,
1299 struct request *req)
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;
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;
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 */
1321 static int mmc_blk_err_check(struct mmc_card *card,
1322 struct mmc_async_req *areq)
1324 struct mmc_queue_req *mq_mrq = container_of(areq, struct mmc_queue_req,
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;
1332 * sbc.error indicates a problem with the set block count
1333 * command. No data will have been transferred.
1335 * cmd.error indicates a problem with the r/w command. No
1336 * data will have been transferred.
1338 * stop.error indicates a problem with the stop command. Data
1339 * may have been transferred, or may still be transferring.
1341 if (brq->sbc.error || brq->cmd.error || brq->stop.error ||
1343 switch (mmc_blk_cmd_recovery(card, req, brq, &ecc_err, &gen_err)) {
1345 return MMC_BLK_RETRY;
1347 return MMC_BLK_ABORT;
1349 return MMC_BLK_NOMEDIUM;
1356 * Check for errors relating to the execution of the
1357 * initial command - such as address errors. No data
1358 * has been transferred.
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;
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.
1371 if (!mmc_host_is_spi(card->host) && rq_data_dir(req) != READ) {
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__,
1382 err = card_busy_detect(card, MMC_BLK_TIMEOUT_MS, false, req,
1385 return MMC_BLK_CMD_ERR;
1388 /* if general error occurs, retry the write operation. */
1390 pr_warn("%s: retrying write for general error\n",
1391 req->rq_disk->disk_name);
1392 return MMC_BLK_RETRY;
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;
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]);
1408 if (rq_data_dir(req) == READ) {
1410 return MMC_BLK_ECC_ERR;
1411 return MMC_BLK_DATA_ERR;
1413 return MMC_BLK_CMD_ERR;
1417 if (!brq->data.bytes_xfered)
1418 return MMC_BLK_RETRY;
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;
1424 return MMC_BLK_SUCCESS;
1427 if (blk_rq_bytes(req) != brq->data.bytes_xfered)
1428 return MMC_BLK_PARTIAL;
1430 return MMC_BLK_SUCCESS;
1433 static int mmc_blk_packed_err_check(struct mmc_card *card,
1434 struct mmc_async_req *areq)
1436 struct mmc_queue_req *mq_rq = container_of(areq, struct mmc_queue_req,
1438 struct request *req = mq_rq->req;
1439 struct mmc_packed *packed = mq_rq->packed;
1440 int err, check, status;
1446 check = mmc_blk_err_check(card, areq);
1447 err = get_card_status(card, &status, 0);
1449 pr_err("%s: error %d sending status command\n",
1450 req->rq_disk->disk_name, err);
1451 return MMC_BLK_ABORT;
1454 if (status & R1_EXCEPTION_EVENT) {
1455 err = mmc_get_ext_csd(card, &ext_csd);
1457 pr_err("%s: error %d sending ext_csd\n",
1458 req->rq_disk->disk_name, err);
1459 return MMC_BLK_ABORT;
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;
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);
1483 static void mmc_blk_rw_rq_prep(struct mmc_queue_req *mqrq,
1484 struct mmc_card *card,
1486 struct mmc_queue *mq)
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;
1495 * Reliable writes are used to implement Forced Unit Access and
1496 * are supported only on MMCs.
1498 bool do_rel_wr = (req->cmd_flags & REQ_FUA) &&
1499 (rq_data_dir(req) == WRITE) &&
1500 (md->flags & MMC_BLK_REL_WR);
1502 memset(brq, 0, sizeof(struct mmc_blk_request));
1503 brq->mrq.cmd = &brq->cmd;
1504 brq->mrq.data = &brq->data;
1506 brq->cmd.arg = blk_rq_pos(req);
1507 if (!mmc_card_blockaddr(card))
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;
1513 brq->data.blocks = blk_rq_sectors(req);
1516 * The block layer doesn't support all sector count
1517 * restrictions, so we need to be prepared for too big
1520 if (brq->data.blocks > card->host->max_blk_count)
1521 brq->data.blocks = card->host->max_blk_count;
1523 if (brq->data.blocks > 1) {
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.
1530 brq->data.blocks = 1;
1533 * Some controllers have HW issues while operating
1534 * in multiple I/O mode
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,
1543 if (brq->data.blocks > 1 || do_rel_wr) {
1544 /* SPI multiblock writes terminate using a special
1545 * token, not a STOP_TRANSMISSION request.
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;
1553 brq->mrq.stop = NULL;
1554 readcmd = MMC_READ_SINGLE_BLOCK;
1555 writecmd = MMC_WRITE_BLOCK;
1557 if (rq_data_dir(req) == READ) {
1558 brq->cmd.opcode = readcmd;
1559 brq->data.flags = MMC_DATA_READ;
1561 brq->stop.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 |
1564 brq->cmd.opcode = writecmd;
1565 brq->data.flags = MMC_DATA_WRITE;
1567 brq->stop.flags = MMC_RSP_SPI_R1B | MMC_RSP_R1B |
1572 mmc_apply_rel_rw(brq, card, req);
1575 * Data tag is used only during writing meta data to speed
1576 * up write and any subsequent read of this meta data
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);
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.
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.
1602 if ((md->flags & MMC_BLK_CMD23) && mmc_op_multi(brq->cmd.opcode) &&
1603 (do_rel_wr || !(card->quirks & MMC_QUIRK_BLK_NO_CMD23) ||
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;
1613 mmc_set_data_timeout(&brq->data, card);
1615 brq->data.sg = mqrq->sg;
1616 brq->data.sg_len = mmc_queue_map_sg(mq, mqrq);
1619 * Adjust the sg list so it is the same size as the
1622 if (brq->data.blocks != blk_rq_sectors(req)) {
1623 int i, data_size = brq->data.blocks << 9;
1624 struct scatterlist *sg;
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;
1634 brq->data.sg_len = i;
1637 mqrq->mmc_active.mrq = &brq->mrq;
1638 mqrq->mmc_active.err_check = mmc_blk_err_check;
1640 mmc_queue_bounce_pre(mqrq);
1643 static inline u8 mmc_calc_packed_hdr_segs(struct request_queue *q,
1644 struct mmc_card *card)
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;
1651 len = min(hdr_sz, max_seg_sz);
1659 static u8 mmc_blk_prep_packed_list(struct mmc_queue *mq, struct request *req)
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;
1673 if (!(md->flags & MMC_BLK_PACKED_CMD))
1676 if ((rq_data_dir(cur) == WRITE) &&
1677 mmc_host_packed_wr(card->host))
1678 max_packed_rw = card->ext_csd.max_packed_writes;
1680 if (max_packed_rw == 0)
1683 if (mmc_req_rel_wr(cur) &&
1684 (md->flags & MMC_BLK_REL_WR) && !en_rel_wr)
1687 if (mmc_large_sector(card) &&
1688 !IS_ALIGNED(blk_rq_sectors(cur), 8))
1691 mmc_blk_clear_packed(mqrq);
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;
1698 max_phys_segs = queue_max_segments(q);
1699 req_sectors += blk_rq_sectors(cur);
1700 phys_segments += cur->nr_phys_segments;
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);
1708 if (reqs >= max_packed_rw - 1) {
1713 spin_lock_irq(q->queue_lock);
1714 next = blk_fetch_request(q);
1715 spin_unlock_irq(q->queue_lock);
1721 if (mmc_large_sector(card) &&
1722 !IS_ALIGNED(blk_rq_sectors(next), 8))
1725 if (next->cmd_flags & REQ_DISCARD ||
1726 next->cmd_flags & REQ_FLUSH)
1729 if (rq_data_dir(cur) != rq_data_dir(next))
1732 if (mmc_req_rel_wr(next) &&
1733 (md->flags & MMC_BLK_REL_WR) && !en_rel_wr)
1736 req_sectors += blk_rq_sectors(next);
1737 if (req_sectors > max_blk_count)
1740 phys_segments += next->nr_phys_segments;
1741 if (phys_segments > max_phys_segs)
1744 list_add_tail(&next->queuelist, &mqrq->packed->list);
1750 spin_lock_irq(q->queue_lock);
1751 blk_requeue_request(q, next);
1752 spin_unlock_irq(q->queue_lock);
1756 list_add(&req->queuelist, &mqrq->packed->list);
1757 mqrq->packed->nr_entries = ++reqs;
1758 mqrq->packed->retries = reqs;
1763 mqrq->cmd_type = MMC_PACKED_NONE;
1767 static void mmc_blk_packed_hdr_wrq_prep(struct mmc_queue_req *mqrq,
1768 struct mmc_card *card,
1769 struct mmc_queue *mq)
1771 struct mmc_blk_request *brq = &mqrq->brq;
1772 struct request *req = mqrq->req;
1773 struct request *prq;
1774 struct mmc_blk_data *md = mq->data;
1775 struct mmc_packed *packed = mqrq->packed;
1776 bool do_rel_wr, do_data_tag;
1777 u32 *packed_cmd_hdr;
1783 mqrq->cmd_type = MMC_PACKED_WRITE;
1785 packed->idx_failure = MMC_PACKED_NR_IDX;
1787 packed_cmd_hdr = packed->cmd_hdr;
1788 memset(packed_cmd_hdr, 0, sizeof(packed->cmd_hdr));
1789 packed_cmd_hdr[0] = (packed->nr_entries << 16) |
1790 (PACKED_CMD_WR << 8) | PACKED_CMD_VER;
1791 hdr_blocks = mmc_large_sector(card) ? 8 : 1;
1794 * Argument for each entry of packed group
1796 list_for_each_entry(prq, &packed->list, queuelist) {
1797 do_rel_wr = mmc_req_rel_wr(prq) && (md->flags & MMC_BLK_REL_WR);
1798 do_data_tag = (card->ext_csd.data_tag_unit_size) &&
1799 (prq->cmd_flags & REQ_META) &&
1800 (rq_data_dir(prq) == WRITE) &&
1801 ((brq->data.blocks * brq->data.blksz) >=
1802 card->ext_csd.data_tag_unit_size);
1803 /* Argument of CMD23 */
1804 packed_cmd_hdr[(i * 2)] =
1805 (do_rel_wr ? MMC_CMD23_ARG_REL_WR : 0) |
1806 (do_data_tag ? MMC_CMD23_ARG_TAG_REQ : 0) |
1807 blk_rq_sectors(prq);
1808 /* Argument of CMD18 or CMD25 */
1809 packed_cmd_hdr[((i * 2)) + 1] =
1810 mmc_card_blockaddr(card) ?
1811 blk_rq_pos(prq) : blk_rq_pos(prq) << 9;
1812 packed->blocks += blk_rq_sectors(prq);
1816 memset(brq, 0, sizeof(struct mmc_blk_request));
1817 brq->mrq.cmd = &brq->cmd;
1818 brq->mrq.data = &brq->data;
1819 brq->mrq.sbc = &brq->sbc;
1820 brq->mrq.stop = &brq->stop;
1822 brq->sbc.opcode = MMC_SET_BLOCK_COUNT;
1823 brq->sbc.arg = MMC_CMD23_ARG_PACKED | (packed->blocks + hdr_blocks);
1824 brq->sbc.flags = MMC_RSP_R1 | MMC_CMD_AC;
1826 brq->cmd.opcode = MMC_WRITE_MULTIPLE_BLOCK;
1827 brq->cmd.arg = blk_rq_pos(req);
1828 if (!mmc_card_blockaddr(card))
1830 brq->cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC;
1832 brq->data.blksz = 512;
1833 brq->data.blocks = packed->blocks + hdr_blocks;
1834 brq->data.flags = MMC_DATA_WRITE;
1836 brq->stop.opcode = MMC_STOP_TRANSMISSION;
1838 brq->stop.flags = MMC_RSP_SPI_R1B | MMC_RSP_R1B | MMC_CMD_AC;
1840 mmc_set_data_timeout(&brq->data, card);
1842 brq->data.sg = mqrq->sg;
1843 brq->data.sg_len = mmc_queue_map_sg(mq, mqrq);
1845 mqrq->mmc_active.mrq = &brq->mrq;
1846 mqrq->mmc_active.err_check = mmc_blk_packed_err_check;
1848 mmc_queue_bounce_pre(mqrq);
1851 static int mmc_blk_cmd_err(struct mmc_blk_data *md, struct mmc_card *card,
1852 struct mmc_blk_request *brq, struct request *req,
1855 struct mmc_queue_req *mq_rq;
1856 mq_rq = container_of(brq, struct mmc_queue_req, brq);
1859 * If this is an SD card and we're writing, we can first
1860 * mark the known good sectors as ok.
1862 * If the card is not SD, we can still ok written sectors
1863 * as reported by the controller (which might be less than
1864 * the real number of written sectors, but never more).
1866 if (mmc_card_sd(card)) {
1869 blocks = mmc_sd_num_wr_blocks(card);
1870 if (blocks != (u32)-1) {
1871 ret = blk_end_request(req, 0, blocks << 9);
1874 if (!mmc_packed_cmd(mq_rq->cmd_type))
1875 ret = blk_end_request(req, 0, brq->data.bytes_xfered);
1880 static int mmc_blk_end_packed_req(struct mmc_queue_req *mq_rq)
1882 struct request *prq;
1883 struct mmc_packed *packed = mq_rq->packed;
1884 int idx = packed->idx_failure, i = 0;
1889 while (!list_empty(&packed->list)) {
1890 prq = list_entry_rq(packed->list.next);
1892 /* retry from error index */
1893 packed->nr_entries -= idx;
1897 if (packed->nr_entries == MMC_PACKED_NR_SINGLE) {
1898 list_del_init(&prq->queuelist);
1899 mmc_blk_clear_packed(mq_rq);
1903 list_del_init(&prq->queuelist);
1904 blk_end_request(prq, 0, blk_rq_bytes(prq));
1908 mmc_blk_clear_packed(mq_rq);
1912 static void mmc_blk_abort_packed_req(struct mmc_queue_req *mq_rq)
1914 struct request *prq;
1915 struct mmc_packed *packed = mq_rq->packed;
1919 while (!list_empty(&packed->list)) {
1920 prq = list_entry_rq(packed->list.next);
1921 list_del_init(&prq->queuelist);
1922 blk_end_request(prq, -EIO, blk_rq_bytes(prq));
1925 mmc_blk_clear_packed(mq_rq);
1928 static void mmc_blk_revert_packed_req(struct mmc_queue *mq,
1929 struct mmc_queue_req *mq_rq)
1931 struct request *prq;
1932 struct request_queue *q = mq->queue;
1933 struct mmc_packed *packed = mq_rq->packed;
1937 while (!list_empty(&packed->list)) {
1938 prq = list_entry_rq(packed->list.prev);
1939 if (prq->queuelist.prev != &packed->list) {
1940 list_del_init(&prq->queuelist);
1941 spin_lock_irq(q->queue_lock);
1942 blk_requeue_request(mq->queue, prq);
1943 spin_unlock_irq(q->queue_lock);
1945 list_del_init(&prq->queuelist);
1949 mmc_blk_clear_packed(mq_rq);
1952 static int mmc_blk_issue_rw_rq(struct mmc_queue *mq, struct request *rqc)
1954 struct mmc_blk_data *md = mq->data;
1955 struct mmc_card *card = md->queue.card;
1956 struct mmc_blk_request *brq = &mq->mqrq_cur->brq;
1957 int ret = 1, disable_multi = 0, retry = 0, type, retune_retry_done = 0;
1958 enum mmc_blk_status status;
1959 struct mmc_queue_req *mq_rq;
1960 struct request *req = rqc;
1961 struct mmc_async_req *areq;
1962 const u8 packed_nr = 2;
1965 if (!rqc && !mq->mqrq_prev->req)
1969 reqs = mmc_blk_prep_packed_list(mq, rqc);
1974 * When 4KB native sector is enabled, only 8 blocks
1975 * multiple read or write is allowed
1977 if ((brq->data.blocks & 0x07) &&
1978 (card->ext_csd.data_sector_size == 4096)) {
1979 pr_err("%s: Transfer size is not 4KB sector size aligned\n",
1980 req->rq_disk->disk_name);
1981 mq_rq = mq->mqrq_cur;
1985 if (reqs >= packed_nr)
1986 mmc_blk_packed_hdr_wrq_prep(mq->mqrq_cur,
1989 mmc_blk_rw_rq_prep(mq->mqrq_cur, card, 0, mq);
1990 areq = &mq->mqrq_cur->mmc_active;
1993 areq = mmc_start_req(card->host, areq, (int *) &status);
1995 if (status == MMC_BLK_NEW_REQUEST)
1996 mq->flags |= MMC_QUEUE_NEW_REQUEST;
2000 mq_rq = container_of(areq, struct mmc_queue_req, mmc_active);
2003 type = rq_data_dir(req) == READ ? MMC_BLK_READ : MMC_BLK_WRITE;
2004 mmc_queue_bounce_post(mq_rq);
2007 case MMC_BLK_SUCCESS:
2008 case MMC_BLK_PARTIAL:
2010 * A block was successfully transferred.
2012 mmc_blk_reset_success(md, type);
2014 if (mmc_packed_cmd(mq_rq->cmd_type)) {
2015 ret = mmc_blk_end_packed_req(mq_rq);
2018 ret = blk_end_request(req, 0,
2019 brq->data.bytes_xfered);
2023 * If the blk_end_request function returns non-zero even
2024 * though all data has been transferred and no errors
2025 * were returned by the host controller, it's a bug.
2027 if (status == MMC_BLK_SUCCESS && ret) {
2028 pr_err("%s BUG rq_tot %d d_xfer %d\n",
2029 __func__, blk_rq_bytes(req),
2030 brq->data.bytes_xfered);
2035 case MMC_BLK_CMD_ERR:
2036 ret = mmc_blk_cmd_err(md, card, brq, req, ret);
2037 if (mmc_blk_reset(md, card->host, type))
2043 retune_retry_done = brq->retune_retry_done;
2048 if (!mmc_blk_reset(md, card->host, type))
2051 case MMC_BLK_DATA_ERR: {
2054 err = mmc_blk_reset(md, card->host, type);
2057 if (err == -ENODEV ||
2058 mmc_packed_cmd(mq_rq->cmd_type))
2062 case MMC_BLK_ECC_ERR:
2063 if (brq->data.blocks > 1) {
2064 /* Redo read one sector at a time */
2065 pr_warn("%s: retrying using single block read\n",
2066 req->rq_disk->disk_name);
2071 * After an error, we redo I/O one sector at a
2072 * time, so we only reach here after trying to
2073 * read a single sector.
2075 ret = blk_end_request(req, -EIO,
2080 case MMC_BLK_NOMEDIUM:
2083 pr_err("%s: Unhandled return value (%d)",
2084 req->rq_disk->disk_name, status);
2089 if (mmc_packed_cmd(mq_rq->cmd_type)) {
2090 if (!mq_rq->packed->retries)
2092 mmc_blk_packed_hdr_wrq_prep(mq_rq, card, mq);
2093 mmc_start_req(card->host,
2094 &mq_rq->mmc_active, NULL);
2098 * In case of a incomplete request
2099 * prepare it again and resend.
2101 mmc_blk_rw_rq_prep(mq_rq, card,
2103 mmc_start_req(card->host,
2104 &mq_rq->mmc_active, NULL);
2106 mq_rq->brq.retune_retry_done = retune_retry_done;
2113 if (mmc_packed_cmd(mq_rq->cmd_type)) {
2114 mmc_blk_abort_packed_req(mq_rq);
2116 if (mmc_card_removed(card))
2117 req->cmd_flags |= REQ_QUIET;
2119 ret = blk_end_request(req, -EIO,
2120 blk_rq_cur_bytes(req));
2125 if (mmc_card_removed(card)) {
2126 rqc->cmd_flags |= REQ_QUIET;
2127 blk_end_request_all(rqc, -EIO);
2130 * If current request is packed, it needs to put back.
2132 if (mmc_packed_cmd(mq->mqrq_cur->cmd_type))
2133 mmc_blk_revert_packed_req(mq, mq->mqrq_cur);
2135 mmc_blk_rw_rq_prep(mq->mqrq_cur, card, 0, mq);
2136 mmc_start_req(card->host,
2137 &mq->mqrq_cur->mmc_active, NULL);
2144 static int mmc_blk_issue_rq(struct mmc_queue *mq, struct request *req)
2147 struct mmc_blk_data *md = mq->data;
2148 struct mmc_card *card = md->queue.card;
2149 struct mmc_host *host = card->host;
2150 unsigned long flags;
2151 unsigned int cmd_flags = req ? req->cmd_flags : 0;
2153 if (req && !mq->mqrq_prev->req)
2154 /* claim host only for the first request */
2157 ret = mmc_blk_part_switch(card, md);
2160 blk_end_request_all(req, -EIO);
2166 mq->flags &= ~MMC_QUEUE_NEW_REQUEST;
2167 if (cmd_flags & REQ_DISCARD) {
2168 /* complete ongoing async transfer before issuing discard */
2169 if (card->host->areq)
2170 mmc_blk_issue_rw_rq(mq, NULL);
2171 if (req->cmd_flags & REQ_SECURE)
2172 ret = mmc_blk_issue_secdiscard_rq(mq, req);
2174 ret = mmc_blk_issue_discard_rq(mq, req);
2175 } else if (cmd_flags & REQ_FLUSH) {
2176 /* complete ongoing async transfer before issuing flush */
2177 if (card->host->areq)
2178 mmc_blk_issue_rw_rq(mq, NULL);
2179 ret = mmc_blk_issue_flush(mq, req);
2181 if (!req && host->areq) {
2182 spin_lock_irqsave(&host->context_info.lock, flags);
2183 host->context_info.is_waiting_last_req = true;
2184 spin_unlock_irqrestore(&host->context_info.lock, flags);
2186 ret = mmc_blk_issue_rw_rq(mq, req);
2190 if ((!req && !(mq->flags & MMC_QUEUE_NEW_REQUEST)) ||
2191 (cmd_flags & MMC_REQ_SPECIAL_MASK))
2193 * Release host when there are no more requests
2194 * and after special request(discard, flush) is done.
2195 * In case sepecial request, there is no reentry to
2196 * the 'mmc_blk_issue_rq' with 'mqrq_prev->req'.
2202 static inline int mmc_blk_readonly(struct mmc_card *card)
2204 return mmc_card_readonly(card) ||
2205 !(card->csd.cmdclass & CCC_BLOCK_WRITE);
2208 static struct mmc_blk_data *mmc_blk_alloc_req(struct mmc_card *card,
2209 struct device *parent,
2212 const char *subname,
2215 struct mmc_blk_data *md;
2219 if (!ida_pre_get(&mmc_blk_ida, GFP_KERNEL))
2220 return ERR_PTR(-ENOMEM);
2222 spin_lock(&mmc_blk_lock);
2223 ret = ida_get_new(&mmc_blk_ida, &devidx);
2224 spin_unlock(&mmc_blk_lock);
2229 return ERR_PTR(ret);
2231 if (devidx >= max_devices) {
2236 md = kzalloc(sizeof(struct mmc_blk_data), GFP_KERNEL);
2242 md->area_type = area_type;
2245 * Set the read-only status based on the supported commands
2246 * and the write protect switch.
2248 md->read_only = mmc_blk_readonly(card);
2250 md->disk = alloc_disk(perdev_minors);
2251 if (md->disk == NULL) {
2256 spin_lock_init(&md->lock);
2257 INIT_LIST_HEAD(&md->part);
2260 ret = mmc_init_queue(&md->queue, card, &md->lock, subname);
2264 md->queue.issue_fn = mmc_blk_issue_rq;
2265 md->queue.data = md;
2267 md->disk->major = MMC_BLOCK_MAJOR;
2268 md->disk->first_minor = devidx * perdev_minors;
2269 md->disk->fops = &mmc_bdops;
2270 md->disk->private_data = md;
2271 md->disk->queue = md->queue.queue;
2272 md->disk->driverfs_dev = parent;
2273 set_disk_ro(md->disk, md->read_only || default_ro);
2274 md->disk->flags = GENHD_FL_EXT_DEVT;
2275 if (area_type & (MMC_BLK_DATA_AREA_RPMB | MMC_BLK_DATA_AREA_BOOT))
2276 md->disk->flags |= GENHD_FL_NO_PART_SCAN;
2279 * As discussed on lkml, GENHD_FL_REMOVABLE should:
2281 * - be set for removable media with permanent block devices
2282 * - be unset for removable block devices with permanent media
2284 * Since MMC block devices clearly fall under the second
2285 * case, we do not set GENHD_FL_REMOVABLE. Userspace
2286 * should use the block device creation/destruction hotplug
2287 * messages to tell when the card is present.
2290 snprintf(md->disk->disk_name, sizeof(md->disk->disk_name),
2291 "mmcblk%u%s", card->host->index, subname ? subname : "");
2293 if (mmc_card_mmc(card))
2294 blk_queue_logical_block_size(md->queue.queue,
2295 card->ext_csd.data_sector_size);
2297 blk_queue_logical_block_size(md->queue.queue, 512);
2299 set_capacity(md->disk, size);
2301 if (mmc_host_cmd23(card->host)) {
2302 if (mmc_card_mmc(card) ||
2303 (mmc_card_sd(card) &&
2304 card->scr.cmds & SD_SCR_CMD23_SUPPORT))
2305 md->flags |= MMC_BLK_CMD23;
2308 if (mmc_card_mmc(card) &&
2309 md->flags & MMC_BLK_CMD23 &&
2310 ((card->ext_csd.rel_param & EXT_CSD_WR_REL_PARAM_EN) ||
2311 card->ext_csd.rel_sectors)) {
2312 md->flags |= MMC_BLK_REL_WR;
2313 blk_queue_write_cache(md->queue.queue, true, true);
2316 if (mmc_card_mmc(card) &&
2317 (area_type == MMC_BLK_DATA_AREA_MAIN) &&
2318 (md->flags & MMC_BLK_CMD23) &&
2319 card->ext_csd.packed_event_en) {
2320 if (!mmc_packed_init(&md->queue, card))
2321 md->flags |= MMC_BLK_PACKED_CMD;
2331 spin_lock(&mmc_blk_lock);
2332 ida_remove(&mmc_blk_ida, devidx);
2333 spin_unlock(&mmc_blk_lock);
2334 return ERR_PTR(ret);
2337 static struct mmc_blk_data *mmc_blk_alloc(struct mmc_card *card)
2341 if (!mmc_card_sd(card) && mmc_card_blockaddr(card)) {
2343 * The EXT_CSD sector count is in number or 512 byte
2346 size = card->ext_csd.sectors;
2349 * The CSD capacity field is in units of read_blkbits.
2350 * set_capacity takes units of 512 bytes.
2352 size = (typeof(sector_t))card->csd.capacity
2353 << (card->csd.read_blkbits - 9);
2356 return mmc_blk_alloc_req(card, &card->dev, size, false, NULL,
2357 MMC_BLK_DATA_AREA_MAIN);
2360 static int mmc_blk_alloc_part(struct mmc_card *card,
2361 struct mmc_blk_data *md,
2362 unsigned int part_type,
2365 const char *subname,
2369 struct mmc_blk_data *part_md;
2371 part_md = mmc_blk_alloc_req(card, disk_to_dev(md->disk), size, default_ro,
2372 subname, area_type);
2373 if (IS_ERR(part_md))
2374 return PTR_ERR(part_md);
2375 part_md->part_type = part_type;
2376 list_add(&part_md->part, &md->part);
2378 string_get_size((u64)get_capacity(part_md->disk), 512, STRING_UNITS_2,
2379 cap_str, sizeof(cap_str));
2380 pr_info("%s: %s %s partition %u %s\n",
2381 part_md->disk->disk_name, mmc_card_id(card),
2382 mmc_card_name(card), part_md->part_type, cap_str);
2386 /* MMC Physical partitions consist of two boot partitions and
2387 * up to four general purpose partitions.
2388 * For each partition enabled in EXT_CSD a block device will be allocatedi
2389 * to provide access to the partition.
2392 static int mmc_blk_alloc_parts(struct mmc_card *card, struct mmc_blk_data *md)
2396 if (!mmc_card_mmc(card))
2399 for (idx = 0; idx < card->nr_parts; idx++) {
2400 if (card->part[idx].size) {
2401 ret = mmc_blk_alloc_part(card, md,
2402 card->part[idx].part_cfg,
2403 card->part[idx].size >> 9,
2404 card->part[idx].force_ro,
2405 card->part[idx].name,
2406 card->part[idx].area_type);
2415 static void mmc_blk_remove_req(struct mmc_blk_data *md)
2417 struct mmc_card *card;
2421 * Flush remaining requests and free queues. It
2422 * is freeing the queue that stops new requests
2423 * from being accepted.
2425 card = md->queue.card;
2426 mmc_cleanup_queue(&md->queue);
2427 if (md->flags & MMC_BLK_PACKED_CMD)
2428 mmc_packed_clean(&md->queue);
2429 if (md->disk->flags & GENHD_FL_UP) {
2430 device_remove_file(disk_to_dev(md->disk), &md->force_ro);
2431 if ((md->area_type & MMC_BLK_DATA_AREA_BOOT) &&
2432 card->ext_csd.boot_ro_lockable)
2433 device_remove_file(disk_to_dev(md->disk),
2434 &md->power_ro_lock);
2436 del_gendisk(md->disk);
2442 static void mmc_blk_remove_parts(struct mmc_card *card,
2443 struct mmc_blk_data *md)
2445 struct list_head *pos, *q;
2446 struct mmc_blk_data *part_md;
2448 list_for_each_safe(pos, q, &md->part) {
2449 part_md = list_entry(pos, struct mmc_blk_data, part);
2451 mmc_blk_remove_req(part_md);
2455 static int mmc_add_disk(struct mmc_blk_data *md)
2458 struct mmc_card *card = md->queue.card;
2461 md->force_ro.show = force_ro_show;
2462 md->force_ro.store = force_ro_store;
2463 sysfs_attr_init(&md->force_ro.attr);
2464 md->force_ro.attr.name = "force_ro";
2465 md->force_ro.attr.mode = S_IRUGO | S_IWUSR;
2466 ret = device_create_file(disk_to_dev(md->disk), &md->force_ro);
2470 if ((md->area_type & MMC_BLK_DATA_AREA_BOOT) &&
2471 card->ext_csd.boot_ro_lockable) {
2474 if (card->ext_csd.boot_ro_lock & EXT_CSD_BOOT_WP_B_PWR_WP_DIS)
2477 mode = S_IRUGO | S_IWUSR;
2479 md->power_ro_lock.show = power_ro_lock_show;
2480 md->power_ro_lock.store = power_ro_lock_store;
2481 sysfs_attr_init(&md->power_ro_lock.attr);
2482 md->power_ro_lock.attr.mode = mode;
2483 md->power_ro_lock.attr.name =
2484 "ro_lock_until_next_power_on";
2485 ret = device_create_file(disk_to_dev(md->disk),
2486 &md->power_ro_lock);
2488 goto power_ro_lock_fail;
2493 device_remove_file(disk_to_dev(md->disk), &md->force_ro);
2495 del_gendisk(md->disk);
2500 #define CID_MANFID_SANDISK 0x2
2501 #define CID_MANFID_TOSHIBA 0x11
2502 #define CID_MANFID_MICRON 0x13
2503 #define CID_MANFID_SAMSUNG 0x15
2504 #define CID_MANFID_KINGSTON 0x70
2506 static const struct mmc_fixup blk_fixups[] =
2508 MMC_FIXUP("SEM02G", CID_MANFID_SANDISK, 0x100, add_quirk,
2509 MMC_QUIRK_INAND_CMD38),
2510 MMC_FIXUP("SEM04G", CID_MANFID_SANDISK, 0x100, add_quirk,
2511 MMC_QUIRK_INAND_CMD38),
2512 MMC_FIXUP("SEM08G", CID_MANFID_SANDISK, 0x100, add_quirk,
2513 MMC_QUIRK_INAND_CMD38),
2514 MMC_FIXUP("SEM16G", CID_MANFID_SANDISK, 0x100, add_quirk,
2515 MMC_QUIRK_INAND_CMD38),
2516 MMC_FIXUP("SEM32G", CID_MANFID_SANDISK, 0x100, add_quirk,
2517 MMC_QUIRK_INAND_CMD38),
2520 * Some MMC cards experience performance degradation with CMD23
2521 * instead of CMD12-bounded multiblock transfers. For now we'll
2522 * black list what's bad...
2523 * - Certain Toshiba cards.
2525 * N.B. This doesn't affect SD cards.
2527 MMC_FIXUP("SDMB-32", CID_MANFID_SANDISK, CID_OEMID_ANY, add_quirk_mmc,
2528 MMC_QUIRK_BLK_NO_CMD23),
2529 MMC_FIXUP("SDM032", CID_MANFID_SANDISK, CID_OEMID_ANY, add_quirk_mmc,
2530 MMC_QUIRK_BLK_NO_CMD23),
2531 MMC_FIXUP("MMC08G", CID_MANFID_TOSHIBA, CID_OEMID_ANY, add_quirk_mmc,
2532 MMC_QUIRK_BLK_NO_CMD23),
2533 MMC_FIXUP("MMC16G", CID_MANFID_TOSHIBA, CID_OEMID_ANY, add_quirk_mmc,
2534 MMC_QUIRK_BLK_NO_CMD23),
2535 MMC_FIXUP("MMC32G", CID_MANFID_TOSHIBA, CID_OEMID_ANY, add_quirk_mmc,
2536 MMC_QUIRK_BLK_NO_CMD23),
2539 * Some MMC cards need longer data read timeout than indicated in CSD.
2541 MMC_FIXUP(CID_NAME_ANY, CID_MANFID_MICRON, 0x200, add_quirk_mmc,
2542 MMC_QUIRK_LONG_READ_TIME),
2543 MMC_FIXUP("008GE0", CID_MANFID_TOSHIBA, CID_OEMID_ANY, add_quirk_mmc,
2544 MMC_QUIRK_LONG_READ_TIME),
2547 * On these Samsung MoviNAND parts, performing secure erase or
2548 * secure trim can result in unrecoverable corruption due to a
2551 MMC_FIXUP("M8G2FA", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2552 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2553 MMC_FIXUP("MAG4FA", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2554 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2555 MMC_FIXUP("MBG8FA", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2556 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2557 MMC_FIXUP("MCGAFA", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2558 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2559 MMC_FIXUP("VAL00M", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2560 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2561 MMC_FIXUP("VYL00M", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2562 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2563 MMC_FIXUP("KYL00M", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2564 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2565 MMC_FIXUP("VZL00M", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2566 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2569 * On Some Kingston eMMCs, performing trim can result in
2570 * unrecoverable data conrruption occasionally due to a firmware bug.
2572 MMC_FIXUP("V10008", CID_MANFID_KINGSTON, CID_OEMID_ANY, add_quirk_mmc,
2573 MMC_QUIRK_TRIM_BROKEN),
2574 MMC_FIXUP("V10016", CID_MANFID_KINGSTON, CID_OEMID_ANY, add_quirk_mmc,
2575 MMC_QUIRK_TRIM_BROKEN),
2580 static int mmc_blk_probe(struct mmc_card *card)
2582 struct mmc_blk_data *md, *part_md;
2586 * Check that the card supports the command class(es) we need.
2588 if (!(card->csd.cmdclass & CCC_BLOCK_READ))
2591 mmc_fixup_device(card, blk_fixups);
2593 md = mmc_blk_alloc(card);
2597 string_get_size((u64)get_capacity(md->disk), 512, STRING_UNITS_2,
2598 cap_str, sizeof(cap_str));
2599 pr_info("%s: %s %s %s %s\n",
2600 md->disk->disk_name, mmc_card_id(card), mmc_card_name(card),
2601 cap_str, md->read_only ? "(ro)" : "");
2603 if (mmc_blk_alloc_parts(card, md))
2606 dev_set_drvdata(&card->dev, md);
2608 if (mmc_add_disk(md))
2611 list_for_each_entry(part_md, &md->part, part) {
2612 if (mmc_add_disk(part_md))
2616 pm_runtime_set_autosuspend_delay(&card->dev, 3000);
2617 pm_runtime_use_autosuspend(&card->dev);
2620 * Don't enable runtime PM for SD-combo cards here. Leave that
2621 * decision to be taken during the SDIO init sequence instead.
2623 if (card->type != MMC_TYPE_SD_COMBO) {
2624 pm_runtime_set_active(&card->dev);
2625 pm_runtime_enable(&card->dev);
2631 mmc_blk_remove_parts(card, md);
2632 mmc_blk_remove_req(md);
2636 static void mmc_blk_remove(struct mmc_card *card)
2638 struct mmc_blk_data *md = dev_get_drvdata(&card->dev);
2640 mmc_blk_remove_parts(card, md);
2641 pm_runtime_get_sync(&card->dev);
2642 mmc_claim_host(card->host);
2643 mmc_blk_part_switch(card, md);
2644 mmc_release_host(card->host);
2645 if (card->type != MMC_TYPE_SD_COMBO)
2646 pm_runtime_disable(&card->dev);
2647 pm_runtime_put_noidle(&card->dev);
2648 mmc_blk_remove_req(md);
2649 dev_set_drvdata(&card->dev, NULL);
2652 static int _mmc_blk_suspend(struct mmc_card *card)
2654 struct mmc_blk_data *part_md;
2655 struct mmc_blk_data *md = dev_get_drvdata(&card->dev);
2658 mmc_queue_suspend(&md->queue);
2659 list_for_each_entry(part_md, &md->part, part) {
2660 mmc_queue_suspend(&part_md->queue);
2666 static void mmc_blk_shutdown(struct mmc_card *card)
2668 _mmc_blk_suspend(card);
2671 #ifdef CONFIG_PM_SLEEP
2672 static int mmc_blk_suspend(struct device *dev)
2674 struct mmc_card *card = mmc_dev_to_card(dev);
2676 return _mmc_blk_suspend(card);
2679 static int mmc_blk_resume(struct device *dev)
2681 struct mmc_blk_data *part_md;
2682 struct mmc_blk_data *md = dev_get_drvdata(dev);
2686 * Resume involves the card going into idle state,
2687 * so current partition is always the main one.
2689 md->part_curr = md->part_type;
2690 mmc_queue_resume(&md->queue);
2691 list_for_each_entry(part_md, &md->part, part) {
2692 mmc_queue_resume(&part_md->queue);
2699 static SIMPLE_DEV_PM_OPS(mmc_blk_pm_ops, mmc_blk_suspend, mmc_blk_resume);
2701 static struct mmc_driver mmc_driver = {
2704 .pm = &mmc_blk_pm_ops,
2706 .probe = mmc_blk_probe,
2707 .remove = mmc_blk_remove,
2708 .shutdown = mmc_blk_shutdown,
2711 static int __init mmc_blk_init(void)
2715 if (perdev_minors != CONFIG_MMC_BLOCK_MINORS)
2716 pr_info("mmcblk: using %d minors per device\n", perdev_minors);
2718 max_devices = min(MAX_DEVICES, (1 << MINORBITS) / perdev_minors);
2720 res = register_blkdev(MMC_BLOCK_MAJOR, "mmc");
2724 res = mmc_register_driver(&mmc_driver);
2730 unregister_blkdev(MMC_BLOCK_MAJOR, "mmc");
2735 static void __exit mmc_blk_exit(void)
2737 mmc_unregister_driver(&mmc_driver);
2738 unregister_blkdev(MMC_BLOCK_MAJOR, "mmc");
2741 module_init(mmc_blk_init);
2742 module_exit(mmc_blk_exit);
2744 MODULE_LICENSE("GPL");
2745 MODULE_DESCRIPTION("Multimedia Card (MMC) block device driver");