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>
39 #include <linux/mmc/ioctl.h>
40 #include <linux/mmc/card.h>
41 #include <linux/mmc/host.h>
42 #include <linux/mmc/mmc.h>
43 #include <linux/mmc/sd.h>
45 #include <asm/uaccess.h>
49 MODULE_ALIAS("mmc:block");
52 #ifdef MODULE_PARAM_PREFIX
53 #undef MODULE_PARAM_PREFIX
55 #define MODULE_PARAM_PREFIX "mmcblk."
58 #define INAND_CMD38_ARG_EXT_CSD 113
59 #define INAND_CMD38_ARG_ERASE 0x00
60 #define INAND_CMD38_ARG_TRIM 0x01
61 #define INAND_CMD38_ARG_SECERASE 0x80
62 #define INAND_CMD38_ARG_SECTRIM1 0x81
63 #define INAND_CMD38_ARG_SECTRIM2 0x88
64 #define MMC_BLK_TIMEOUT_MS (10 * 60 * 1000) /* 10 minute timeout */
65 #define MMC_SANITIZE_REQ_TIMEOUT 240000
66 #define MMC_EXTRACT_INDEX_FROM_ARG(x) ((x & 0x00FF0000) >> 16)
68 #define mmc_req_rel_wr(req) (((req->cmd_flags & REQ_FUA) || \
69 (req->cmd_flags & REQ_META)) && \
70 (rq_data_dir(req) == WRITE))
71 #define PACKED_CMD_VER 0x01
72 #define PACKED_CMD_WR 0x02
74 static DEFINE_MUTEX(block_mutex);
77 * The defaults come from config options but can be overriden by module
80 static int perdev_minors = CONFIG_MMC_BLOCK_MINORS;
83 * We've only got one major, so number of mmcblk devices is
84 * limited to (1 << 20) / number of minors per device. It is also
85 * currently limited by the size of the static bitmaps below.
87 static int max_devices;
89 #define MAX_DEVICES 256
91 /* TODO: Replace these with struct ida */
92 static DECLARE_BITMAP(dev_use, MAX_DEVICES);
93 static DECLARE_BITMAP(name_use, MAX_DEVICES);
96 * There is one mmc_blk_data per slot.
100 struct gendisk *disk;
101 struct mmc_queue queue;
102 struct list_head part;
105 #define MMC_BLK_CMD23 (1 << 0) /* Can do SET_BLOCK_COUNT for multiblock */
106 #define MMC_BLK_REL_WR (1 << 1) /* MMC Reliable write support */
107 #define MMC_BLK_PACKED_CMD (1 << 2) /* MMC packed command support */
110 unsigned int read_only;
111 unsigned int part_type;
112 unsigned int name_idx;
113 unsigned int reset_done;
114 #define MMC_BLK_READ BIT(0)
115 #define MMC_BLK_WRITE BIT(1)
116 #define MMC_BLK_DISCARD BIT(2)
117 #define MMC_BLK_SECDISCARD BIT(3)
120 * Only set in main mmc_blk_data associated
121 * with mmc_card with dev_set_drvdata, and keeps
122 * track of the current selected device partition.
124 unsigned int part_curr;
125 struct device_attribute force_ro;
126 struct device_attribute power_ro_lock;
130 static DEFINE_MUTEX(open_lock);
133 MMC_PACKED_NR_IDX = -1,
135 MMC_PACKED_NR_SINGLE,
138 module_param(perdev_minors, int, 0444);
139 MODULE_PARM_DESC(perdev_minors, "Minors numbers to allocate per device");
141 static inline int mmc_blk_part_switch(struct mmc_card *card,
142 struct mmc_blk_data *md);
143 static int get_card_status(struct mmc_card *card, u32 *status, int retries);
145 static inline void mmc_blk_clear_packed(struct mmc_queue_req *mqrq)
147 struct mmc_packed *packed = mqrq->packed;
151 mqrq->cmd_type = MMC_PACKED_NONE;
152 packed->nr_entries = MMC_PACKED_NR_ZERO;
153 packed->idx_failure = MMC_PACKED_NR_IDX;
158 static struct mmc_blk_data *mmc_blk_get(struct gendisk *disk)
160 struct mmc_blk_data *md;
162 mutex_lock(&open_lock);
163 md = disk->private_data;
164 if (md && md->usage == 0)
168 mutex_unlock(&open_lock);
173 static inline int mmc_get_devidx(struct gendisk *disk)
175 int devmaj = MAJOR(disk_devt(disk));
176 int devidx = MINOR(disk_devt(disk)) / perdev_minors;
179 devidx = disk->first_minor / perdev_minors;
183 static void mmc_blk_put(struct mmc_blk_data *md)
185 mutex_lock(&open_lock);
187 if (md->usage == 0) {
188 int devidx = mmc_get_devidx(md->disk);
189 blk_cleanup_queue(md->queue.queue);
191 __clear_bit(devidx, dev_use);
196 mutex_unlock(&open_lock);
199 static ssize_t power_ro_lock_show(struct device *dev,
200 struct device_attribute *attr, char *buf)
203 struct mmc_blk_data *md = mmc_blk_get(dev_to_disk(dev));
204 struct mmc_card *card = md->queue.card;
207 if (card->ext_csd.boot_ro_lock & EXT_CSD_BOOT_WP_B_PERM_WP_EN)
209 else if (card->ext_csd.boot_ro_lock & EXT_CSD_BOOT_WP_B_PWR_WP_EN)
212 ret = snprintf(buf, PAGE_SIZE, "%d\n", locked);
219 static ssize_t power_ro_lock_store(struct device *dev,
220 struct device_attribute *attr, const char *buf, size_t count)
223 struct mmc_blk_data *md, *part_md;
224 struct mmc_card *card;
227 if (kstrtoul(buf, 0, &set))
233 md = mmc_blk_get(dev_to_disk(dev));
234 card = md->queue.card;
238 ret = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_BOOT_WP,
239 card->ext_csd.boot_ro_lock |
240 EXT_CSD_BOOT_WP_B_PWR_WP_EN,
241 card->ext_csd.part_time);
243 pr_err("%s: Locking boot partition ro until next power on failed: %d\n", md->disk->disk_name, ret);
245 card->ext_csd.boot_ro_lock |= EXT_CSD_BOOT_WP_B_PWR_WP_EN;
250 pr_info("%s: Locking boot partition ro until next power on\n",
251 md->disk->disk_name);
252 set_disk_ro(md->disk, 1);
254 list_for_each_entry(part_md, &md->part, part)
255 if (part_md->area_type == MMC_BLK_DATA_AREA_BOOT) {
256 pr_info("%s: Locking boot partition ro until next power on\n", part_md->disk->disk_name);
257 set_disk_ro(part_md->disk, 1);
265 static ssize_t force_ro_show(struct device *dev, struct device_attribute *attr,
269 struct mmc_blk_data *md = mmc_blk_get(dev_to_disk(dev));
271 ret = snprintf(buf, PAGE_SIZE, "%d\n",
272 get_disk_ro(dev_to_disk(dev)) ^
278 static ssize_t force_ro_store(struct device *dev, struct device_attribute *attr,
279 const char *buf, size_t count)
283 struct mmc_blk_data *md = mmc_blk_get(dev_to_disk(dev));
284 unsigned long set = simple_strtoul(buf, &end, 0);
290 set_disk_ro(dev_to_disk(dev), set || md->read_only);
297 static int mmc_blk_open(struct block_device *bdev, fmode_t mode)
299 struct mmc_blk_data *md = mmc_blk_get(bdev->bd_disk);
302 mutex_lock(&block_mutex);
305 check_disk_change(bdev);
308 if ((mode & FMODE_WRITE) && md->read_only) {
313 mutex_unlock(&block_mutex);
318 static void mmc_blk_release(struct gendisk *disk, fmode_t mode)
320 struct mmc_blk_data *md = disk->private_data;
322 mutex_lock(&block_mutex);
324 mutex_unlock(&block_mutex);
328 mmc_blk_getgeo(struct block_device *bdev, struct hd_geometry *geo)
330 geo->cylinders = get_capacity(bdev->bd_disk) / (4 * 16);
336 struct mmc_blk_ioc_data {
337 struct mmc_ioc_cmd ic;
342 static struct mmc_blk_ioc_data *mmc_blk_ioctl_copy_from_user(
343 struct mmc_ioc_cmd __user *user)
345 struct mmc_blk_ioc_data *idata;
348 idata = kzalloc(sizeof(*idata), GFP_KERNEL);
354 if (copy_from_user(&idata->ic, user, sizeof(idata->ic))) {
359 idata->buf_bytes = (u64) idata->ic.blksz * idata->ic.blocks;
360 if (idata->buf_bytes > MMC_IOC_MAX_BYTES) {
365 if (!idata->buf_bytes)
368 idata->buf = kzalloc(idata->buf_bytes, GFP_KERNEL);
374 if (copy_from_user(idata->buf, (void __user *)(unsigned long)
375 idata->ic.data_ptr, idata->buf_bytes)) {
390 static int mmc_blk_ioctl_copy_to_user(struct mmc_ioc_cmd __user *ic_ptr,
391 struct mmc_blk_ioc_data *idata)
393 struct mmc_ioc_cmd *ic = &idata->ic;
395 if (copy_to_user(&(ic_ptr->response), ic->response,
396 sizeof(ic->response)))
399 if (!idata->ic.write_flag) {
400 if (copy_to_user((void __user *)(unsigned long)ic->data_ptr,
401 idata->buf, idata->buf_bytes))
408 static int ioctl_rpmb_card_status_poll(struct mmc_card *card, u32 *status,
414 if (!status || !retries_max)
418 err = get_card_status(card, status, 5);
422 if (!R1_STATUS(*status) &&
423 (R1_CURRENT_STATE(*status) != R1_STATE_PRG))
424 break; /* RPMB programming operation complete */
427 * Rechedule to give the MMC device a chance to continue
428 * processing the previous command without being polled too
431 usleep_range(1000, 5000);
432 } while (++retry_count < retries_max);
434 if (retry_count == retries_max)
440 static int ioctl_do_sanitize(struct mmc_card *card)
444 if (!mmc_can_sanitize(card)) {
445 pr_warn("%s: %s - SANITIZE is not supported\n",
446 mmc_hostname(card->host), __func__);
451 pr_debug("%s: %s - SANITIZE IN PROGRESS...\n",
452 mmc_hostname(card->host), __func__);
454 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
455 EXT_CSD_SANITIZE_START, 1,
456 MMC_SANITIZE_REQ_TIMEOUT);
459 pr_err("%s: %s - EXT_CSD_SANITIZE_START failed. err=%d\n",
460 mmc_hostname(card->host), __func__, err);
462 pr_debug("%s: %s - SANITIZE COMPLETED\n", mmc_hostname(card->host),
468 static int __mmc_blk_ioctl_cmd(struct mmc_card *card, struct mmc_blk_data *md,
469 struct mmc_blk_ioc_data *idata)
471 struct mmc_command cmd = {0};
472 struct mmc_data data = {0};
473 struct mmc_request mrq = {NULL};
474 struct scatterlist sg;
479 if (!card || !md || !idata)
482 if (md->area_type & MMC_BLK_DATA_AREA_RPMB)
485 cmd.opcode = idata->ic.opcode;
486 cmd.arg = idata->ic.arg;
487 cmd.flags = idata->ic.flags;
489 if (idata->buf_bytes) {
492 data.blksz = idata->ic.blksz;
493 data.blocks = idata->ic.blocks;
495 sg_init_one(data.sg, idata->buf, idata->buf_bytes);
497 if (idata->ic.write_flag)
498 data.flags = MMC_DATA_WRITE;
500 data.flags = MMC_DATA_READ;
502 /* data.flags must already be set before doing this. */
503 mmc_set_data_timeout(&data, card);
505 /* Allow overriding the timeout_ns for empirical tuning. */
506 if (idata->ic.data_timeout_ns)
507 data.timeout_ns = idata->ic.data_timeout_ns;
509 if ((cmd.flags & MMC_RSP_R1B) == MMC_RSP_R1B) {
511 * Pretend this is a data transfer and rely on the
512 * host driver to compute timeout. When all host
513 * drivers support cmd.cmd_timeout for R1B, this
517 * cmd.cmd_timeout = idata->ic.cmd_timeout_ms;
519 data.timeout_ns = idata->ic.cmd_timeout_ms * 1000000;
527 err = mmc_blk_part_switch(card, md);
531 if (idata->ic.is_acmd) {
532 err = mmc_app_cmd(card->host, card);
538 err = mmc_set_blockcount(card, data.blocks,
539 idata->ic.write_flag & (1 << 31));
544 if ((MMC_EXTRACT_INDEX_FROM_ARG(cmd.arg) == EXT_CSD_SANITIZE_START) &&
545 (cmd.opcode == MMC_SWITCH)) {
546 err = ioctl_do_sanitize(card);
549 pr_err("%s: ioctl_do_sanitize() failed. err = %d",
555 mmc_wait_for_req(card->host, &mrq);
558 dev_err(mmc_dev(card->host), "%s: cmd error %d\n",
559 __func__, cmd.error);
563 dev_err(mmc_dev(card->host), "%s: data error %d\n",
564 __func__, data.error);
569 * According to the SD specs, some commands require a delay after
570 * issuing the command.
572 if (idata->ic.postsleep_min_us)
573 usleep_range(idata->ic.postsleep_min_us, idata->ic.postsleep_max_us);
575 memcpy(&(idata->ic.response), cmd.resp, sizeof(cmd.resp));
579 * Ensure RPMB command has completed by polling CMD13
582 err = ioctl_rpmb_card_status_poll(card, &status, 5);
584 dev_err(mmc_dev(card->host),
585 "%s: Card Status=0x%08X, error %d\n",
586 __func__, status, err);
592 static int mmc_blk_ioctl_cmd(struct block_device *bdev,
593 struct mmc_ioc_cmd __user *ic_ptr)
595 struct mmc_blk_ioc_data *idata;
596 struct mmc_blk_data *md;
597 struct mmc_card *card;
598 int err = 0, ioc_err = 0;
600 idata = mmc_blk_ioctl_copy_from_user(ic_ptr);
602 return PTR_ERR(idata);
604 md = mmc_blk_get(bdev->bd_disk);
610 card = md->queue.card;
618 ioc_err = __mmc_blk_ioctl_cmd(card, md, idata);
622 err = mmc_blk_ioctl_copy_to_user(ic_ptr, idata);
629 return ioc_err ? ioc_err : err;
632 static int mmc_blk_ioctl_multi_cmd(struct block_device *bdev,
633 struct mmc_ioc_multi_cmd __user *user)
635 struct mmc_blk_ioc_data **idata = NULL;
636 struct mmc_ioc_cmd __user *cmds = user->cmds;
637 struct mmc_card *card;
638 struct mmc_blk_data *md;
639 int i, err = 0, ioc_err = 0;
642 if (copy_from_user(&num_of_cmds, &user->num_of_cmds,
643 sizeof(num_of_cmds)))
646 if (num_of_cmds > MMC_IOC_MAX_CMDS)
649 idata = kcalloc(num_of_cmds, sizeof(*idata), GFP_KERNEL);
653 for (i = 0; i < num_of_cmds; i++) {
654 idata[i] = mmc_blk_ioctl_copy_from_user(&cmds[i]);
655 if (IS_ERR(idata[i])) {
656 err = PTR_ERR(idata[i]);
662 md = mmc_blk_get(bdev->bd_disk);
666 card = md->queue.card;
674 for (i = 0; i < num_of_cmds && !ioc_err; i++)
675 ioc_err = __mmc_blk_ioctl_cmd(card, md, idata[i]);
679 /* copy to user if data and response */
680 for (i = 0; i < num_of_cmds && !err; i++)
681 err = mmc_blk_ioctl_copy_to_user(&cmds[i], idata[i]);
686 for (i = 0; i < num_of_cmds; i++) {
687 kfree(idata[i]->buf);
691 return ioc_err ? ioc_err : err;
694 static int mmc_blk_ioctl(struct block_device *bdev, fmode_t mode,
695 unsigned int cmd, unsigned long arg)
698 * The caller must have CAP_SYS_RAWIO, and must be calling this on the
699 * whole block device, not on a partition. This prevents overspray
700 * between sibling partitions.
702 if ((!capable(CAP_SYS_RAWIO)) || (bdev != bdev->bd_contains))
707 return mmc_blk_ioctl_cmd(bdev,
708 (struct mmc_ioc_cmd __user *)arg);
709 case MMC_IOC_MULTI_CMD:
710 return mmc_blk_ioctl_multi_cmd(bdev,
711 (struct mmc_ioc_multi_cmd __user *)arg);
718 static int mmc_blk_compat_ioctl(struct block_device *bdev, fmode_t mode,
719 unsigned int cmd, unsigned long arg)
721 return mmc_blk_ioctl(bdev, mode, cmd, (unsigned long) compat_ptr(arg));
725 static const struct block_device_operations mmc_bdops = {
726 .open = mmc_blk_open,
727 .release = mmc_blk_release,
728 .getgeo = mmc_blk_getgeo,
729 .owner = THIS_MODULE,
730 .ioctl = mmc_blk_ioctl,
732 .compat_ioctl = mmc_blk_compat_ioctl,
736 static inline int mmc_blk_part_switch(struct mmc_card *card,
737 struct mmc_blk_data *md)
740 struct mmc_blk_data *main_md = dev_get_drvdata(&card->dev);
742 if (main_md->part_curr == md->part_type)
745 if (mmc_card_mmc(card)) {
746 u8 part_config = card->ext_csd.part_config;
748 part_config &= ~EXT_CSD_PART_CONFIG_ACC_MASK;
749 part_config |= md->part_type;
751 ret = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
752 EXT_CSD_PART_CONFIG, part_config,
753 card->ext_csd.part_time);
757 card->ext_csd.part_config = part_config;
760 main_md->part_curr = md->part_type;
764 static u32 mmc_sd_num_wr_blocks(struct mmc_card *card)
770 struct mmc_request mrq = {NULL};
771 struct mmc_command cmd = {0};
772 struct mmc_data data = {0};
774 struct scatterlist sg;
776 cmd.opcode = MMC_APP_CMD;
777 cmd.arg = card->rca << 16;
778 cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC;
780 err = mmc_wait_for_cmd(card->host, &cmd, 0);
783 if (!mmc_host_is_spi(card->host) && !(cmd.resp[0] & R1_APP_CMD))
786 memset(&cmd, 0, sizeof(struct mmc_command));
788 cmd.opcode = SD_APP_SEND_NUM_WR_BLKS;
790 cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC;
794 data.flags = MMC_DATA_READ;
797 mmc_set_data_timeout(&data, card);
802 blocks = kmalloc(4, GFP_KERNEL);
806 sg_init_one(&sg, blocks, 4);
808 mmc_wait_for_req(card->host, &mrq);
810 result = ntohl(*blocks);
813 if (cmd.error || data.error)
819 static int get_card_status(struct mmc_card *card, u32 *status, int retries)
821 struct mmc_command cmd = {0};
824 cmd.opcode = MMC_SEND_STATUS;
825 if (!mmc_host_is_spi(card->host))
826 cmd.arg = card->rca << 16;
827 cmd.flags = MMC_RSP_SPI_R2 | MMC_RSP_R1 | MMC_CMD_AC;
828 err = mmc_wait_for_cmd(card->host, &cmd, retries);
830 *status = cmd.resp[0];
834 static int card_busy_detect(struct mmc_card *card, unsigned int timeout_ms,
835 bool hw_busy_detect, struct request *req, int *gen_err)
837 unsigned long timeout = jiffies + msecs_to_jiffies(timeout_ms);
842 err = get_card_status(card, &status, 5);
844 pr_err("%s: error %d requesting status\n",
845 req->rq_disk->disk_name, err);
849 if (status & R1_ERROR) {
850 pr_err("%s: %s: error sending status cmd, status %#x\n",
851 req->rq_disk->disk_name, __func__, status);
855 /* We may rely on the host hw to handle busy detection.*/
856 if ((card->host->caps & MMC_CAP_WAIT_WHILE_BUSY) &&
861 * Timeout if the device never becomes ready for data and never
862 * leaves the program state.
864 if (time_after(jiffies, timeout)) {
865 pr_err("%s: Card stuck in programming state! %s %s\n",
866 mmc_hostname(card->host),
867 req->rq_disk->disk_name, __func__);
872 * Some cards mishandle the status bits,
873 * so make sure to check both the busy
874 * indication and the card state.
876 } while (!(status & R1_READY_FOR_DATA) ||
877 (R1_CURRENT_STATE(status) == R1_STATE_PRG));
882 static int send_stop(struct mmc_card *card, unsigned int timeout_ms,
883 struct request *req, int *gen_err, u32 *stop_status)
885 struct mmc_host *host = card->host;
886 struct mmc_command cmd = {0};
888 bool use_r1b_resp = rq_data_dir(req) == WRITE;
891 * Normally we use R1B responses for WRITE, but in cases where the host
892 * has specified a max_busy_timeout we need to validate it. A failure
893 * means we need to prevent the host from doing hw busy detection, which
894 * is done by converting to a R1 response instead.
896 if (host->max_busy_timeout && (timeout_ms > host->max_busy_timeout))
897 use_r1b_resp = false;
899 cmd.opcode = MMC_STOP_TRANSMISSION;
901 cmd.flags = MMC_RSP_SPI_R1B | MMC_RSP_R1B | MMC_CMD_AC;
902 cmd.busy_timeout = timeout_ms;
904 cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC;
907 err = mmc_wait_for_cmd(host, &cmd, 5);
911 *stop_status = cmd.resp[0];
913 /* No need to check card status in case of READ. */
914 if (rq_data_dir(req) == READ)
917 if (!mmc_host_is_spi(host) &&
918 (*stop_status & R1_ERROR)) {
919 pr_err("%s: %s: general error sending stop command, resp %#x\n",
920 req->rq_disk->disk_name, __func__, *stop_status);
924 return card_busy_detect(card, timeout_ms, use_r1b_resp, req, gen_err);
927 #define ERR_NOMEDIUM 3
930 #define ERR_CONTINUE 0
932 static int mmc_blk_cmd_error(struct request *req, const char *name, int error,
933 bool status_valid, u32 status)
937 /* response crc error, retry the r/w cmd */
938 pr_err("%s: %s sending %s command, card status %#x\n",
939 req->rq_disk->disk_name, "response CRC error",
944 pr_err("%s: %s sending %s command, card status %#x\n",
945 req->rq_disk->disk_name, "timed out", name, status);
947 /* If the status cmd initially failed, retry the r/w cmd */
952 * If it was a r/w cmd crc error, or illegal command
953 * (eg, issued in wrong state) then retry - we should
954 * have corrected the state problem above.
956 if (status & (R1_COM_CRC_ERROR | R1_ILLEGAL_COMMAND))
959 /* Otherwise abort the command */
963 /* We don't understand the error code the driver gave us */
964 pr_err("%s: unknown error %d sending read/write command, card status %#x\n",
965 req->rq_disk->disk_name, error, status);
971 * Initial r/w and stop cmd error recovery.
972 * We don't know whether the card received the r/w cmd or not, so try to
973 * restore things back to a sane state. Essentially, we do this as follows:
974 * - Obtain card status. If the first attempt to obtain card status fails,
975 * the status word will reflect the failed status cmd, not the failed
976 * r/w cmd. If we fail to obtain card status, it suggests we can no
977 * longer communicate with the card.
978 * - Check the card state. If the card received the cmd but there was a
979 * transient problem with the response, it might still be in a data transfer
980 * mode. Try to send it a stop command. If this fails, we can't recover.
981 * - If the r/w cmd failed due to a response CRC error, it was probably
982 * transient, so retry the cmd.
983 * - If the r/w cmd timed out, but we didn't get the r/w cmd status, retry.
984 * - If the r/w cmd timed out, and the r/w cmd failed due to CRC error or
985 * illegal cmd, retry.
986 * Otherwise we don't understand what happened, so abort.
988 static int mmc_blk_cmd_recovery(struct mmc_card *card, struct request *req,
989 struct mmc_blk_request *brq, int *ecc_err, int *gen_err)
991 bool prev_cmd_status_valid = true;
992 u32 status, stop_status = 0;
995 if (mmc_card_removed(card))
999 * Try to get card status which indicates both the card state
1000 * and why there was no response. If the first attempt fails,
1001 * we can't be sure the returned status is for the r/w command.
1003 for (retry = 2; retry >= 0; retry--) {
1004 err = get_card_status(card, &status, 0);
1008 /* Re-tune if needed */
1009 mmc_retune_recheck(card->host);
1011 prev_cmd_status_valid = false;
1012 pr_err("%s: error %d sending status command, %sing\n",
1013 req->rq_disk->disk_name, err, retry ? "retry" : "abort");
1016 /* We couldn't get a response from the card. Give up. */
1018 /* Check if the card is removed */
1019 if (mmc_detect_card_removed(card->host))
1020 return ERR_NOMEDIUM;
1024 /* Flag ECC errors */
1025 if ((status & R1_CARD_ECC_FAILED) ||
1026 (brq->stop.resp[0] & R1_CARD_ECC_FAILED) ||
1027 (brq->cmd.resp[0] & R1_CARD_ECC_FAILED))
1030 /* Flag General errors */
1031 if (!mmc_host_is_spi(card->host) && rq_data_dir(req) != READ)
1032 if ((status & R1_ERROR) ||
1033 (brq->stop.resp[0] & R1_ERROR)) {
1034 pr_err("%s: %s: general error sending stop or status command, stop cmd response %#x, card status %#x\n",
1035 req->rq_disk->disk_name, __func__,
1036 brq->stop.resp[0], status);
1041 * Check the current card state. If it is in some data transfer
1042 * mode, tell it to stop (and hopefully transition back to TRAN.)
1044 if (R1_CURRENT_STATE(status) == R1_STATE_DATA ||
1045 R1_CURRENT_STATE(status) == R1_STATE_RCV) {
1046 err = send_stop(card,
1047 DIV_ROUND_UP(brq->data.timeout_ns, 1000000),
1048 req, gen_err, &stop_status);
1050 pr_err("%s: error %d sending stop command\n",
1051 req->rq_disk->disk_name, err);
1053 * If the stop cmd also timed out, the card is probably
1054 * not present, so abort. Other errors are bad news too.
1059 if (stop_status & R1_CARD_ECC_FAILED)
1063 /* Check for set block count errors */
1065 return mmc_blk_cmd_error(req, "SET_BLOCK_COUNT", brq->sbc.error,
1066 prev_cmd_status_valid, status);
1068 /* Check for r/w command errors */
1070 return mmc_blk_cmd_error(req, "r/w cmd", brq->cmd.error,
1071 prev_cmd_status_valid, status);
1074 if (!brq->stop.error)
1075 return ERR_CONTINUE;
1077 /* Now for stop errors. These aren't fatal to the transfer. */
1078 pr_info("%s: error %d sending stop command, original cmd response %#x, card status %#x\n",
1079 req->rq_disk->disk_name, brq->stop.error,
1080 brq->cmd.resp[0], status);
1083 * Subsitute in our own stop status as this will give the error
1084 * state which happened during the execution of the r/w command.
1087 brq->stop.resp[0] = stop_status;
1088 brq->stop.error = 0;
1090 return ERR_CONTINUE;
1093 static int mmc_blk_reset(struct mmc_blk_data *md, struct mmc_host *host,
1098 if (md->reset_done & type)
1101 md->reset_done |= type;
1102 err = mmc_hw_reset(host);
1103 /* Ensure we switch back to the correct partition */
1104 if (err != -EOPNOTSUPP) {
1105 struct mmc_blk_data *main_md =
1106 dev_get_drvdata(&host->card->dev);
1109 main_md->part_curr = main_md->part_type;
1110 part_err = mmc_blk_part_switch(host->card, md);
1113 * We have failed to get back into the correct
1114 * partition, so we need to abort the whole request.
1122 static inline void mmc_blk_reset_success(struct mmc_blk_data *md, int type)
1124 md->reset_done &= ~type;
1127 int mmc_access_rpmb(struct mmc_queue *mq)
1129 struct mmc_blk_data *md = mq->data;
1131 * If this is a RPMB partition access, return ture
1133 if (md && md->part_type == EXT_CSD_PART_CONFIG_ACC_RPMB)
1139 static int mmc_blk_issue_discard_rq(struct mmc_queue *mq, struct request *req)
1141 struct mmc_blk_data *md = mq->data;
1142 struct mmc_card *card = md->queue.card;
1143 unsigned int from, nr, arg;
1144 int err = 0, type = MMC_BLK_DISCARD;
1146 if (!mmc_can_erase(card)) {
1151 from = blk_rq_pos(req);
1152 nr = blk_rq_sectors(req);
1154 if (mmc_can_discard(card))
1155 arg = MMC_DISCARD_ARG;
1156 else if (mmc_can_trim(card))
1159 arg = MMC_ERASE_ARG;
1161 if (card->quirks & MMC_QUIRK_INAND_CMD38) {
1162 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1163 INAND_CMD38_ARG_EXT_CSD,
1164 arg == MMC_TRIM_ARG ?
1165 INAND_CMD38_ARG_TRIM :
1166 INAND_CMD38_ARG_ERASE,
1171 err = mmc_erase(card, from, nr, arg);
1173 if (err == -EIO && !mmc_blk_reset(md, card->host, type))
1176 mmc_blk_reset_success(md, type);
1177 blk_end_request(req, err, blk_rq_bytes(req));
1182 static int mmc_blk_issue_secdiscard_rq(struct mmc_queue *mq,
1183 struct request *req)
1185 struct mmc_blk_data *md = mq->data;
1186 struct mmc_card *card = md->queue.card;
1187 unsigned int from, nr, arg;
1188 int err = 0, type = MMC_BLK_SECDISCARD;
1190 if (!(mmc_can_secure_erase_trim(card))) {
1195 from = blk_rq_pos(req);
1196 nr = blk_rq_sectors(req);
1198 if (mmc_can_trim(card) && !mmc_erase_group_aligned(card, from, nr))
1199 arg = MMC_SECURE_TRIM1_ARG;
1201 arg = MMC_SECURE_ERASE_ARG;
1204 if (card->quirks & MMC_QUIRK_INAND_CMD38) {
1205 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1206 INAND_CMD38_ARG_EXT_CSD,
1207 arg == MMC_SECURE_TRIM1_ARG ?
1208 INAND_CMD38_ARG_SECTRIM1 :
1209 INAND_CMD38_ARG_SECERASE,
1215 err = mmc_erase(card, from, nr, arg);
1221 if (arg == MMC_SECURE_TRIM1_ARG) {
1222 if (card->quirks & MMC_QUIRK_INAND_CMD38) {
1223 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1224 INAND_CMD38_ARG_EXT_CSD,
1225 INAND_CMD38_ARG_SECTRIM2,
1231 err = mmc_erase(card, from, nr, MMC_SECURE_TRIM2_ARG);
1239 if (err && !mmc_blk_reset(md, card->host, type))
1242 mmc_blk_reset_success(md, type);
1244 blk_end_request(req, err, blk_rq_bytes(req));
1249 static int mmc_blk_issue_flush(struct mmc_queue *mq, struct request *req)
1251 struct mmc_blk_data *md = mq->data;
1252 struct mmc_card *card = md->queue.card;
1255 ret = mmc_flush_cache(card);
1259 blk_end_request_all(req, ret);
1265 * Reformat current write as a reliable write, supporting
1266 * both legacy and the enhanced reliable write MMC cards.
1267 * In each transfer we'll handle only as much as a single
1268 * reliable write can handle, thus finish the request in
1269 * partial completions.
1271 static inline void mmc_apply_rel_rw(struct mmc_blk_request *brq,
1272 struct mmc_card *card,
1273 struct request *req)
1275 if (!(card->ext_csd.rel_param & EXT_CSD_WR_REL_PARAM_EN)) {
1276 /* Legacy mode imposes restrictions on transfers. */
1277 if (!IS_ALIGNED(brq->cmd.arg, card->ext_csd.rel_sectors))
1278 brq->data.blocks = 1;
1280 if (brq->data.blocks > card->ext_csd.rel_sectors)
1281 brq->data.blocks = card->ext_csd.rel_sectors;
1282 else if (brq->data.blocks < card->ext_csd.rel_sectors)
1283 brq->data.blocks = 1;
1287 #define CMD_ERRORS \
1288 (R1_OUT_OF_RANGE | /* Command argument out of range */ \
1289 R1_ADDRESS_ERROR | /* Misaligned address */ \
1290 R1_BLOCK_LEN_ERROR | /* Transferred block length incorrect */\
1291 R1_WP_VIOLATION | /* Tried to write to protected block */ \
1292 R1_CC_ERROR | /* Card controller error */ \
1293 R1_ERROR) /* General/unknown error */
1295 static int mmc_blk_err_check(struct mmc_card *card,
1296 struct mmc_async_req *areq)
1298 struct mmc_queue_req *mq_mrq = container_of(areq, struct mmc_queue_req,
1300 struct mmc_blk_request *brq = &mq_mrq->brq;
1301 struct request *req = mq_mrq->req;
1302 int need_retune = card->host->need_retune;
1303 int ecc_err = 0, gen_err = 0;
1306 * sbc.error indicates a problem with the set block count
1307 * command. No data will have been transferred.
1309 * cmd.error indicates a problem with the r/w command. No
1310 * data will have been transferred.
1312 * stop.error indicates a problem with the stop command. Data
1313 * may have been transferred, or may still be transferring.
1315 if (brq->sbc.error || brq->cmd.error || brq->stop.error ||
1317 switch (mmc_blk_cmd_recovery(card, req, brq, &ecc_err, &gen_err)) {
1319 return MMC_BLK_RETRY;
1321 return MMC_BLK_ABORT;
1323 return MMC_BLK_NOMEDIUM;
1330 * Check for errors relating to the execution of the
1331 * initial command - such as address errors. No data
1332 * has been transferred.
1334 if (brq->cmd.resp[0] & CMD_ERRORS) {
1335 pr_err("%s: r/w command failed, status = %#x\n",
1336 req->rq_disk->disk_name, brq->cmd.resp[0]);
1337 return MMC_BLK_ABORT;
1341 * Everything else is either success, or a data error of some
1342 * kind. If it was a write, we may have transitioned to
1343 * program mode, which we have to wait for it to complete.
1345 if (!mmc_host_is_spi(card->host) && rq_data_dir(req) != READ) {
1348 /* Check stop command response */
1349 if (brq->stop.resp[0] & R1_ERROR) {
1350 pr_err("%s: %s: general error sending stop command, stop cmd response %#x\n",
1351 req->rq_disk->disk_name, __func__,
1356 err = card_busy_detect(card, MMC_BLK_TIMEOUT_MS, false, req,
1359 return MMC_BLK_CMD_ERR;
1362 /* if general error occurs, retry the write operation. */
1364 pr_warn("%s: retrying write for general error\n",
1365 req->rq_disk->disk_name);
1366 return MMC_BLK_RETRY;
1369 if (brq->data.error) {
1370 if (need_retune && !brq->retune_retry_done) {
1371 pr_info("%s: retrying because a re-tune was needed\n",
1372 req->rq_disk->disk_name);
1373 brq->retune_retry_done = 1;
1374 return MMC_BLK_RETRY;
1376 pr_err("%s: error %d transferring data, sector %u, nr %u, cmd response %#x, card status %#x\n",
1377 req->rq_disk->disk_name, brq->data.error,
1378 (unsigned)blk_rq_pos(req),
1379 (unsigned)blk_rq_sectors(req),
1380 brq->cmd.resp[0], brq->stop.resp[0]);
1382 if (rq_data_dir(req) == READ) {
1384 return MMC_BLK_ECC_ERR;
1385 return MMC_BLK_DATA_ERR;
1387 return MMC_BLK_CMD_ERR;
1391 if (!brq->data.bytes_xfered)
1392 return MMC_BLK_RETRY;
1394 if (mmc_packed_cmd(mq_mrq->cmd_type)) {
1395 if (unlikely(brq->data.blocks << 9 != brq->data.bytes_xfered))
1396 return MMC_BLK_PARTIAL;
1398 return MMC_BLK_SUCCESS;
1401 if (blk_rq_bytes(req) != brq->data.bytes_xfered)
1402 return MMC_BLK_PARTIAL;
1404 return MMC_BLK_SUCCESS;
1407 static int mmc_blk_packed_err_check(struct mmc_card *card,
1408 struct mmc_async_req *areq)
1410 struct mmc_queue_req *mq_rq = container_of(areq, struct mmc_queue_req,
1412 struct request *req = mq_rq->req;
1413 struct mmc_packed *packed = mq_rq->packed;
1414 int err, check, status;
1420 check = mmc_blk_err_check(card, areq);
1421 err = get_card_status(card, &status, 0);
1423 pr_err("%s: error %d sending status command\n",
1424 req->rq_disk->disk_name, err);
1425 return MMC_BLK_ABORT;
1428 if (status & R1_EXCEPTION_EVENT) {
1429 err = mmc_get_ext_csd(card, &ext_csd);
1431 pr_err("%s: error %d sending ext_csd\n",
1432 req->rq_disk->disk_name, err);
1433 return MMC_BLK_ABORT;
1436 if ((ext_csd[EXT_CSD_EXP_EVENTS_STATUS] &
1437 EXT_CSD_PACKED_FAILURE) &&
1438 (ext_csd[EXT_CSD_PACKED_CMD_STATUS] &
1439 EXT_CSD_PACKED_GENERIC_ERROR)) {
1440 if (ext_csd[EXT_CSD_PACKED_CMD_STATUS] &
1441 EXT_CSD_PACKED_INDEXED_ERROR) {
1442 packed->idx_failure =
1443 ext_csd[EXT_CSD_PACKED_FAILURE_INDEX] - 1;
1444 check = MMC_BLK_PARTIAL;
1446 pr_err("%s: packed cmd failed, nr %u, sectors %u, "
1447 "failure index: %d\n",
1448 req->rq_disk->disk_name, packed->nr_entries,
1449 packed->blocks, packed->idx_failure);
1457 static void mmc_blk_rw_rq_prep(struct mmc_queue_req *mqrq,
1458 struct mmc_card *card,
1460 struct mmc_queue *mq)
1462 u32 readcmd, writecmd;
1463 struct mmc_blk_request *brq = &mqrq->brq;
1464 struct request *req = mqrq->req;
1465 struct mmc_blk_data *md = mq->data;
1469 * Reliable writes are used to implement Forced Unit Access and
1470 * REQ_META accesses, and are supported only on MMCs.
1472 * XXX: this really needs a good explanation of why REQ_META
1473 * is treated special.
1475 bool do_rel_wr = ((req->cmd_flags & REQ_FUA) ||
1476 (req->cmd_flags & REQ_META)) &&
1477 (rq_data_dir(req) == WRITE) &&
1478 (md->flags & MMC_BLK_REL_WR);
1480 memset(brq, 0, sizeof(struct mmc_blk_request));
1481 brq->mrq.cmd = &brq->cmd;
1482 brq->mrq.data = &brq->data;
1484 brq->cmd.arg = blk_rq_pos(req);
1485 if (!mmc_card_blockaddr(card))
1487 brq->cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC;
1488 brq->data.blksz = 512;
1489 brq->stop.opcode = MMC_STOP_TRANSMISSION;
1491 brq->data.blocks = blk_rq_sectors(req);
1494 * The block layer doesn't support all sector count
1495 * restrictions, so we need to be prepared for too big
1498 if (brq->data.blocks > card->host->max_blk_count)
1499 brq->data.blocks = card->host->max_blk_count;
1501 if (brq->data.blocks > 1) {
1503 * After a read error, we redo the request one sector
1504 * at a time in order to accurately determine which
1505 * sectors can be read successfully.
1508 brq->data.blocks = 1;
1511 * Some controllers have HW issues while operating
1512 * in multiple I/O mode
1514 if (card->host->ops->multi_io_quirk)
1515 brq->data.blocks = card->host->ops->multi_io_quirk(card,
1516 (rq_data_dir(req) == READ) ?
1517 MMC_DATA_READ : MMC_DATA_WRITE,
1521 if (brq->data.blocks > 1 || do_rel_wr) {
1522 /* SPI multiblock writes terminate using a special
1523 * token, not a STOP_TRANSMISSION request.
1525 if (!mmc_host_is_spi(card->host) ||
1526 rq_data_dir(req) == READ)
1527 brq->mrq.stop = &brq->stop;
1528 readcmd = MMC_READ_MULTIPLE_BLOCK;
1529 writecmd = MMC_WRITE_MULTIPLE_BLOCK;
1531 brq->mrq.stop = NULL;
1532 readcmd = MMC_READ_SINGLE_BLOCK;
1533 writecmd = MMC_WRITE_BLOCK;
1535 if (rq_data_dir(req) == READ) {
1536 brq->cmd.opcode = readcmd;
1537 brq->data.flags |= MMC_DATA_READ;
1539 brq->stop.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 |
1542 brq->cmd.opcode = writecmd;
1543 brq->data.flags |= MMC_DATA_WRITE;
1545 brq->stop.flags = MMC_RSP_SPI_R1B | MMC_RSP_R1B |
1550 mmc_apply_rel_rw(brq, card, req);
1553 * Data tag is used only during writing meta data to speed
1554 * up write and any subsequent read of this meta data
1556 do_data_tag = (card->ext_csd.data_tag_unit_size) &&
1557 (req->cmd_flags & REQ_META) &&
1558 (rq_data_dir(req) == WRITE) &&
1559 ((brq->data.blocks * brq->data.blksz) >=
1560 card->ext_csd.data_tag_unit_size);
1563 * Pre-defined multi-block transfers are preferable to
1564 * open ended-ones (and necessary for reliable writes).
1565 * However, it is not sufficient to just send CMD23,
1566 * and avoid the final CMD12, as on an error condition
1567 * CMD12 (stop) needs to be sent anyway. This, coupled
1568 * with Auto-CMD23 enhancements provided by some
1569 * hosts, means that the complexity of dealing
1570 * with this is best left to the host. If CMD23 is
1571 * supported by card and host, we'll fill sbc in and let
1572 * the host deal with handling it correctly. This means
1573 * that for hosts that don't expose MMC_CAP_CMD23, no
1574 * change of behavior will be observed.
1576 * N.B: Some MMC cards experience perf degradation.
1577 * We'll avoid using CMD23-bounded multiblock writes for
1578 * these, while retaining features like reliable writes.
1580 if ((md->flags & MMC_BLK_CMD23) && mmc_op_multi(brq->cmd.opcode) &&
1581 (do_rel_wr || !(card->quirks & MMC_QUIRK_BLK_NO_CMD23) ||
1583 brq->sbc.opcode = MMC_SET_BLOCK_COUNT;
1584 brq->sbc.arg = brq->data.blocks |
1585 (do_rel_wr ? (1 << 31) : 0) |
1586 (do_data_tag ? (1 << 29) : 0);
1587 brq->sbc.flags = MMC_RSP_R1 | MMC_CMD_AC;
1588 brq->mrq.sbc = &brq->sbc;
1591 mmc_set_data_timeout(&brq->data, card);
1593 brq->data.sg = mqrq->sg;
1594 brq->data.sg_len = mmc_queue_map_sg(mq, mqrq);
1597 * Adjust the sg list so it is the same size as the
1600 if (brq->data.blocks != blk_rq_sectors(req)) {
1601 int i, data_size = brq->data.blocks << 9;
1602 struct scatterlist *sg;
1604 for_each_sg(brq->data.sg, sg, brq->data.sg_len, i) {
1605 data_size -= sg->length;
1606 if (data_size <= 0) {
1607 sg->length += data_size;
1612 brq->data.sg_len = i;
1615 mqrq->mmc_active.mrq = &brq->mrq;
1616 mqrq->mmc_active.err_check = mmc_blk_err_check;
1618 mmc_queue_bounce_pre(mqrq);
1621 static inline u8 mmc_calc_packed_hdr_segs(struct request_queue *q,
1622 struct mmc_card *card)
1624 unsigned int hdr_sz = mmc_large_sector(card) ? 4096 : 512;
1625 unsigned int max_seg_sz = queue_max_segment_size(q);
1626 unsigned int len, nr_segs = 0;
1629 len = min(hdr_sz, max_seg_sz);
1637 static u8 mmc_blk_prep_packed_list(struct mmc_queue *mq, struct request *req)
1639 struct request_queue *q = mq->queue;
1640 struct mmc_card *card = mq->card;
1641 struct request *cur = req, *next = NULL;
1642 struct mmc_blk_data *md = mq->data;
1643 struct mmc_queue_req *mqrq = mq->mqrq_cur;
1644 bool en_rel_wr = card->ext_csd.rel_param & EXT_CSD_WR_REL_PARAM_EN;
1645 unsigned int req_sectors = 0, phys_segments = 0;
1646 unsigned int max_blk_count, max_phys_segs;
1647 bool put_back = true;
1648 u8 max_packed_rw = 0;
1651 if (!(md->flags & MMC_BLK_PACKED_CMD))
1654 if ((rq_data_dir(cur) == WRITE) &&
1655 mmc_host_packed_wr(card->host))
1656 max_packed_rw = card->ext_csd.max_packed_writes;
1658 if (max_packed_rw == 0)
1661 if (mmc_req_rel_wr(cur) &&
1662 (md->flags & MMC_BLK_REL_WR) && !en_rel_wr)
1665 if (mmc_large_sector(card) &&
1666 !IS_ALIGNED(blk_rq_sectors(cur), 8))
1669 mmc_blk_clear_packed(mqrq);
1671 max_blk_count = min(card->host->max_blk_count,
1672 card->host->max_req_size >> 9);
1673 if (unlikely(max_blk_count > 0xffff))
1674 max_blk_count = 0xffff;
1676 max_phys_segs = queue_max_segments(q);
1677 req_sectors += blk_rq_sectors(cur);
1678 phys_segments += cur->nr_phys_segments;
1680 if (rq_data_dir(cur) == WRITE) {
1681 req_sectors += mmc_large_sector(card) ? 8 : 1;
1682 phys_segments += mmc_calc_packed_hdr_segs(q, card);
1686 if (reqs >= max_packed_rw - 1) {
1691 spin_lock_irq(q->queue_lock);
1692 next = blk_fetch_request(q);
1693 spin_unlock_irq(q->queue_lock);
1699 if (mmc_large_sector(card) &&
1700 !IS_ALIGNED(blk_rq_sectors(next), 8))
1703 if (next->cmd_flags & REQ_DISCARD ||
1704 next->cmd_flags & REQ_FLUSH)
1707 if (rq_data_dir(cur) != rq_data_dir(next))
1710 if (mmc_req_rel_wr(next) &&
1711 (md->flags & MMC_BLK_REL_WR) && !en_rel_wr)
1714 req_sectors += blk_rq_sectors(next);
1715 if (req_sectors > max_blk_count)
1718 phys_segments += next->nr_phys_segments;
1719 if (phys_segments > max_phys_segs)
1722 list_add_tail(&next->queuelist, &mqrq->packed->list);
1728 spin_lock_irq(q->queue_lock);
1729 blk_requeue_request(q, next);
1730 spin_unlock_irq(q->queue_lock);
1734 list_add(&req->queuelist, &mqrq->packed->list);
1735 mqrq->packed->nr_entries = ++reqs;
1736 mqrq->packed->retries = reqs;
1741 mqrq->cmd_type = MMC_PACKED_NONE;
1745 static void mmc_blk_packed_hdr_wrq_prep(struct mmc_queue_req *mqrq,
1746 struct mmc_card *card,
1747 struct mmc_queue *mq)
1749 struct mmc_blk_request *brq = &mqrq->brq;
1750 struct request *req = mqrq->req;
1751 struct request *prq;
1752 struct mmc_blk_data *md = mq->data;
1753 struct mmc_packed *packed = mqrq->packed;
1754 bool do_rel_wr, do_data_tag;
1755 u32 *packed_cmd_hdr;
1761 mqrq->cmd_type = MMC_PACKED_WRITE;
1763 packed->idx_failure = MMC_PACKED_NR_IDX;
1765 packed_cmd_hdr = packed->cmd_hdr;
1766 memset(packed_cmd_hdr, 0, sizeof(packed->cmd_hdr));
1767 packed_cmd_hdr[0] = (packed->nr_entries << 16) |
1768 (PACKED_CMD_WR << 8) | PACKED_CMD_VER;
1769 hdr_blocks = mmc_large_sector(card) ? 8 : 1;
1772 * Argument for each entry of packed group
1774 list_for_each_entry(prq, &packed->list, queuelist) {
1775 do_rel_wr = mmc_req_rel_wr(prq) && (md->flags & MMC_BLK_REL_WR);
1776 do_data_tag = (card->ext_csd.data_tag_unit_size) &&
1777 (prq->cmd_flags & REQ_META) &&
1778 (rq_data_dir(prq) == WRITE) &&
1779 ((brq->data.blocks * brq->data.blksz) >=
1780 card->ext_csd.data_tag_unit_size);
1781 /* Argument of CMD23 */
1782 packed_cmd_hdr[(i * 2)] =
1783 (do_rel_wr ? MMC_CMD23_ARG_REL_WR : 0) |
1784 (do_data_tag ? MMC_CMD23_ARG_TAG_REQ : 0) |
1785 blk_rq_sectors(prq);
1786 /* Argument of CMD18 or CMD25 */
1787 packed_cmd_hdr[((i * 2)) + 1] =
1788 mmc_card_blockaddr(card) ?
1789 blk_rq_pos(prq) : blk_rq_pos(prq) << 9;
1790 packed->blocks += blk_rq_sectors(prq);
1794 memset(brq, 0, sizeof(struct mmc_blk_request));
1795 brq->mrq.cmd = &brq->cmd;
1796 brq->mrq.data = &brq->data;
1797 brq->mrq.sbc = &brq->sbc;
1798 brq->mrq.stop = &brq->stop;
1800 brq->sbc.opcode = MMC_SET_BLOCK_COUNT;
1801 brq->sbc.arg = MMC_CMD23_ARG_PACKED | (packed->blocks + hdr_blocks);
1802 brq->sbc.flags = MMC_RSP_R1 | MMC_CMD_AC;
1804 brq->cmd.opcode = MMC_WRITE_MULTIPLE_BLOCK;
1805 brq->cmd.arg = blk_rq_pos(req);
1806 if (!mmc_card_blockaddr(card))
1808 brq->cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC;
1810 brq->data.blksz = 512;
1811 brq->data.blocks = packed->blocks + hdr_blocks;
1812 brq->data.flags |= MMC_DATA_WRITE;
1814 brq->stop.opcode = MMC_STOP_TRANSMISSION;
1816 brq->stop.flags = MMC_RSP_SPI_R1B | MMC_RSP_R1B | MMC_CMD_AC;
1818 mmc_set_data_timeout(&brq->data, card);
1820 brq->data.sg = mqrq->sg;
1821 brq->data.sg_len = mmc_queue_map_sg(mq, mqrq);
1823 mqrq->mmc_active.mrq = &brq->mrq;
1824 mqrq->mmc_active.err_check = mmc_blk_packed_err_check;
1826 mmc_queue_bounce_pre(mqrq);
1829 static int mmc_blk_cmd_err(struct mmc_blk_data *md, struct mmc_card *card,
1830 struct mmc_blk_request *brq, struct request *req,
1833 struct mmc_queue_req *mq_rq;
1834 mq_rq = container_of(brq, struct mmc_queue_req, brq);
1837 * If this is an SD card and we're writing, we can first
1838 * mark the known good sectors as ok.
1840 * If the card is not SD, we can still ok written sectors
1841 * as reported by the controller (which might be less than
1842 * the real number of written sectors, but never more).
1844 if (mmc_card_sd(card)) {
1847 blocks = mmc_sd_num_wr_blocks(card);
1848 if (blocks != (u32)-1) {
1849 ret = blk_end_request(req, 0, blocks << 9);
1852 if (!mmc_packed_cmd(mq_rq->cmd_type))
1853 ret = blk_end_request(req, 0, brq->data.bytes_xfered);
1858 static int mmc_blk_end_packed_req(struct mmc_queue_req *mq_rq)
1860 struct request *prq;
1861 struct mmc_packed *packed = mq_rq->packed;
1862 int idx = packed->idx_failure, i = 0;
1867 while (!list_empty(&packed->list)) {
1868 prq = list_entry_rq(packed->list.next);
1870 /* retry from error index */
1871 packed->nr_entries -= idx;
1875 if (packed->nr_entries == MMC_PACKED_NR_SINGLE) {
1876 list_del_init(&prq->queuelist);
1877 mmc_blk_clear_packed(mq_rq);
1881 list_del_init(&prq->queuelist);
1882 blk_end_request(prq, 0, blk_rq_bytes(prq));
1886 mmc_blk_clear_packed(mq_rq);
1890 static void mmc_blk_abort_packed_req(struct mmc_queue_req *mq_rq)
1892 struct request *prq;
1893 struct mmc_packed *packed = mq_rq->packed;
1897 while (!list_empty(&packed->list)) {
1898 prq = list_entry_rq(packed->list.next);
1899 list_del_init(&prq->queuelist);
1900 blk_end_request(prq, -EIO, blk_rq_bytes(prq));
1903 mmc_blk_clear_packed(mq_rq);
1906 static void mmc_blk_revert_packed_req(struct mmc_queue *mq,
1907 struct mmc_queue_req *mq_rq)
1909 struct request *prq;
1910 struct request_queue *q = mq->queue;
1911 struct mmc_packed *packed = mq_rq->packed;
1915 while (!list_empty(&packed->list)) {
1916 prq = list_entry_rq(packed->list.prev);
1917 if (prq->queuelist.prev != &packed->list) {
1918 list_del_init(&prq->queuelist);
1919 spin_lock_irq(q->queue_lock);
1920 blk_requeue_request(mq->queue, prq);
1921 spin_unlock_irq(q->queue_lock);
1923 list_del_init(&prq->queuelist);
1927 mmc_blk_clear_packed(mq_rq);
1930 static int mmc_blk_issue_rw_rq(struct mmc_queue *mq, struct request *rqc)
1932 struct mmc_blk_data *md = mq->data;
1933 struct mmc_card *card = md->queue.card;
1934 struct mmc_blk_request *brq = &mq->mqrq_cur->brq;
1935 int ret = 1, disable_multi = 0, retry = 0, type, retune_retry_done = 0;
1936 enum mmc_blk_status status;
1937 struct mmc_queue_req *mq_rq;
1938 struct request *req = rqc;
1939 struct mmc_async_req *areq;
1940 const u8 packed_nr = 2;
1943 if (!rqc && !mq->mqrq_prev->req)
1947 reqs = mmc_blk_prep_packed_list(mq, rqc);
1952 * When 4KB native sector is enabled, only 8 blocks
1953 * multiple read or write is allowed
1955 if ((brq->data.blocks & 0x07) &&
1956 (card->ext_csd.data_sector_size == 4096)) {
1957 pr_err("%s: Transfer size is not 4KB sector size aligned\n",
1958 req->rq_disk->disk_name);
1959 mq_rq = mq->mqrq_cur;
1963 if (reqs >= packed_nr)
1964 mmc_blk_packed_hdr_wrq_prep(mq->mqrq_cur,
1967 mmc_blk_rw_rq_prep(mq->mqrq_cur, card, 0, mq);
1968 areq = &mq->mqrq_cur->mmc_active;
1971 areq = mmc_start_req(card->host, areq, (int *) &status);
1973 if (status == MMC_BLK_NEW_REQUEST)
1974 mq->flags |= MMC_QUEUE_NEW_REQUEST;
1978 mq_rq = container_of(areq, struct mmc_queue_req, mmc_active);
1981 type = rq_data_dir(req) == READ ? MMC_BLK_READ : MMC_BLK_WRITE;
1982 mmc_queue_bounce_post(mq_rq);
1985 case MMC_BLK_SUCCESS:
1986 case MMC_BLK_PARTIAL:
1988 * A block was successfully transferred.
1990 mmc_blk_reset_success(md, type);
1992 if (mmc_packed_cmd(mq_rq->cmd_type)) {
1993 ret = mmc_blk_end_packed_req(mq_rq);
1996 ret = blk_end_request(req, 0,
1997 brq->data.bytes_xfered);
2001 * If the blk_end_request function returns non-zero even
2002 * though all data has been transferred and no errors
2003 * were returned by the host controller, it's a bug.
2005 if (status == MMC_BLK_SUCCESS && ret) {
2006 pr_err("%s BUG rq_tot %d d_xfer %d\n",
2007 __func__, blk_rq_bytes(req),
2008 brq->data.bytes_xfered);
2013 case MMC_BLK_CMD_ERR:
2014 ret = mmc_blk_cmd_err(md, card, brq, req, ret);
2015 if (mmc_blk_reset(md, card->host, type))
2021 retune_retry_done = brq->retune_retry_done;
2026 if (!mmc_blk_reset(md, card->host, type))
2029 case MMC_BLK_DATA_ERR: {
2032 err = mmc_blk_reset(md, card->host, type);
2035 if (err == -ENODEV ||
2036 mmc_packed_cmd(mq_rq->cmd_type))
2040 case MMC_BLK_ECC_ERR:
2041 if (brq->data.blocks > 1) {
2042 /* Redo read one sector at a time */
2043 pr_warn("%s: retrying using single block read\n",
2044 req->rq_disk->disk_name);
2049 * After an error, we redo I/O one sector at a
2050 * time, so we only reach here after trying to
2051 * read a single sector.
2053 ret = blk_end_request(req, -EIO,
2058 case MMC_BLK_NOMEDIUM:
2061 pr_err("%s: Unhandled return value (%d)",
2062 req->rq_disk->disk_name, status);
2067 if (mmc_packed_cmd(mq_rq->cmd_type)) {
2068 if (!mq_rq->packed->retries)
2070 mmc_blk_packed_hdr_wrq_prep(mq_rq, card, mq);
2071 mmc_start_req(card->host,
2072 &mq_rq->mmc_active, NULL);
2076 * In case of a incomplete request
2077 * prepare it again and resend.
2079 mmc_blk_rw_rq_prep(mq_rq, card,
2081 mmc_start_req(card->host,
2082 &mq_rq->mmc_active, NULL);
2084 mq_rq->brq.retune_retry_done = retune_retry_done;
2091 if (mmc_packed_cmd(mq_rq->cmd_type)) {
2092 mmc_blk_abort_packed_req(mq_rq);
2094 if (mmc_card_removed(card))
2095 req->cmd_flags |= REQ_QUIET;
2097 ret = blk_end_request(req, -EIO,
2098 blk_rq_cur_bytes(req));
2103 if (mmc_card_removed(card)) {
2104 rqc->cmd_flags |= REQ_QUIET;
2105 blk_end_request_all(rqc, -EIO);
2108 * If current request is packed, it needs to put back.
2110 if (mmc_packed_cmd(mq->mqrq_cur->cmd_type))
2111 mmc_blk_revert_packed_req(mq, mq->mqrq_cur);
2113 mmc_blk_rw_rq_prep(mq->mqrq_cur, card, 0, mq);
2114 mmc_start_req(card->host,
2115 &mq->mqrq_cur->mmc_active, NULL);
2122 static int mmc_blk_issue_rq(struct mmc_queue *mq, struct request *req)
2125 struct mmc_blk_data *md = mq->data;
2126 struct mmc_card *card = md->queue.card;
2127 struct mmc_host *host = card->host;
2128 unsigned long flags;
2129 unsigned int cmd_flags = req ? req->cmd_flags : 0;
2131 if (req && !mq->mqrq_prev->req)
2132 /* claim host only for the first request */
2135 ret = mmc_blk_part_switch(card, md);
2138 blk_end_request_all(req, -EIO);
2144 mq->flags &= ~MMC_QUEUE_NEW_REQUEST;
2145 if (cmd_flags & REQ_DISCARD) {
2146 /* complete ongoing async transfer before issuing discard */
2147 if (card->host->areq)
2148 mmc_blk_issue_rw_rq(mq, NULL);
2149 if (req->cmd_flags & REQ_SECURE)
2150 ret = mmc_blk_issue_secdiscard_rq(mq, req);
2152 ret = mmc_blk_issue_discard_rq(mq, req);
2153 } else if (cmd_flags & REQ_FLUSH) {
2154 /* complete ongoing async transfer before issuing flush */
2155 if (card->host->areq)
2156 mmc_blk_issue_rw_rq(mq, NULL);
2157 ret = mmc_blk_issue_flush(mq, req);
2159 if (!req && host->areq) {
2160 spin_lock_irqsave(&host->context_info.lock, flags);
2161 host->context_info.is_waiting_last_req = true;
2162 spin_unlock_irqrestore(&host->context_info.lock, flags);
2164 ret = mmc_blk_issue_rw_rq(mq, req);
2168 if ((!req && !(mq->flags & MMC_QUEUE_NEW_REQUEST)) ||
2169 (cmd_flags & MMC_REQ_SPECIAL_MASK))
2171 * Release host when there are no more requests
2172 * and after special request(discard, flush) is done.
2173 * In case sepecial request, there is no reentry to
2174 * the 'mmc_blk_issue_rq' with 'mqrq_prev->req'.
2180 static inline int mmc_blk_readonly(struct mmc_card *card)
2182 return mmc_card_readonly(card) ||
2183 !(card->csd.cmdclass & CCC_BLOCK_WRITE);
2186 static struct mmc_blk_data *mmc_blk_alloc_req(struct mmc_card *card,
2187 struct device *parent,
2190 const char *subname,
2193 struct mmc_blk_data *md;
2196 devidx = find_first_zero_bit(dev_use, max_devices);
2197 if (devidx >= max_devices)
2198 return ERR_PTR(-ENOSPC);
2199 __set_bit(devidx, dev_use);
2201 md = kzalloc(sizeof(struct mmc_blk_data), GFP_KERNEL);
2208 * !subname implies we are creating main mmc_blk_data that will be
2209 * associated with mmc_card with dev_set_drvdata. Due to device
2210 * partitions, devidx will not coincide with a per-physical card
2211 * index anymore so we keep track of a name index.
2214 md->name_idx = find_first_zero_bit(name_use, max_devices);
2215 __set_bit(md->name_idx, name_use);
2217 md->name_idx = ((struct mmc_blk_data *)
2218 dev_to_disk(parent)->private_data)->name_idx;
2220 md->area_type = area_type;
2223 * Set the read-only status based on the supported commands
2224 * and the write protect switch.
2226 md->read_only = mmc_blk_readonly(card);
2228 md->disk = alloc_disk(perdev_minors);
2229 if (md->disk == NULL) {
2234 spin_lock_init(&md->lock);
2235 INIT_LIST_HEAD(&md->part);
2238 ret = mmc_init_queue(&md->queue, card, &md->lock, subname);
2242 md->queue.issue_fn = mmc_blk_issue_rq;
2243 md->queue.data = md;
2245 md->disk->major = MMC_BLOCK_MAJOR;
2246 md->disk->first_minor = devidx * perdev_minors;
2247 md->disk->fops = &mmc_bdops;
2248 md->disk->private_data = md;
2249 md->disk->queue = md->queue.queue;
2250 md->disk->driverfs_dev = parent;
2251 set_disk_ro(md->disk, md->read_only || default_ro);
2252 if (area_type & (MMC_BLK_DATA_AREA_RPMB | MMC_BLK_DATA_AREA_BOOT))
2253 md->disk->flags |= GENHD_FL_NO_PART_SCAN;
2256 * As discussed on lkml, GENHD_FL_REMOVABLE should:
2258 * - be set for removable media with permanent block devices
2259 * - be unset for removable block devices with permanent media
2261 * Since MMC block devices clearly fall under the second
2262 * case, we do not set GENHD_FL_REMOVABLE. Userspace
2263 * should use the block device creation/destruction hotplug
2264 * messages to tell when the card is present.
2267 snprintf(md->disk->disk_name, sizeof(md->disk->disk_name),
2268 "mmcblk%u%s", md->name_idx, subname ? subname : "");
2270 if (mmc_card_mmc(card))
2271 blk_queue_logical_block_size(md->queue.queue,
2272 card->ext_csd.data_sector_size);
2274 blk_queue_logical_block_size(md->queue.queue, 512);
2276 set_capacity(md->disk, size);
2278 if (mmc_host_cmd23(card->host)) {
2279 if (mmc_card_mmc(card) ||
2280 (mmc_card_sd(card) &&
2281 card->scr.cmds & SD_SCR_CMD23_SUPPORT))
2282 md->flags |= MMC_BLK_CMD23;
2285 if (mmc_card_mmc(card) &&
2286 md->flags & MMC_BLK_CMD23 &&
2287 ((card->ext_csd.rel_param & EXT_CSD_WR_REL_PARAM_EN) ||
2288 card->ext_csd.rel_sectors)) {
2289 md->flags |= MMC_BLK_REL_WR;
2290 blk_queue_flush(md->queue.queue, REQ_FLUSH | REQ_FUA);
2293 if (mmc_card_mmc(card) &&
2294 (area_type == MMC_BLK_DATA_AREA_MAIN) &&
2295 (md->flags & MMC_BLK_CMD23) &&
2296 card->ext_csd.packed_event_en) {
2297 if (!mmc_packed_init(&md->queue, card))
2298 md->flags |= MMC_BLK_PACKED_CMD;
2308 return ERR_PTR(ret);
2311 static struct mmc_blk_data *mmc_blk_alloc(struct mmc_card *card)
2315 if (!mmc_card_sd(card) && mmc_card_blockaddr(card)) {
2317 * The EXT_CSD sector count is in number or 512 byte
2320 size = card->ext_csd.sectors;
2323 * The CSD capacity field is in units of read_blkbits.
2324 * set_capacity takes units of 512 bytes.
2326 size = (typeof(sector_t))card->csd.capacity
2327 << (card->csd.read_blkbits - 9);
2330 return mmc_blk_alloc_req(card, &card->dev, size, false, NULL,
2331 MMC_BLK_DATA_AREA_MAIN);
2334 static int mmc_blk_alloc_part(struct mmc_card *card,
2335 struct mmc_blk_data *md,
2336 unsigned int part_type,
2339 const char *subname,
2343 struct mmc_blk_data *part_md;
2345 part_md = mmc_blk_alloc_req(card, disk_to_dev(md->disk), size, default_ro,
2346 subname, area_type);
2347 if (IS_ERR(part_md))
2348 return PTR_ERR(part_md);
2349 part_md->part_type = part_type;
2350 list_add(&part_md->part, &md->part);
2352 string_get_size((u64)get_capacity(part_md->disk), 512, STRING_UNITS_2,
2353 cap_str, sizeof(cap_str));
2354 pr_info("%s: %s %s partition %u %s\n",
2355 part_md->disk->disk_name, mmc_card_id(card),
2356 mmc_card_name(card), part_md->part_type, cap_str);
2360 /* MMC Physical partitions consist of two boot partitions and
2361 * up to four general purpose partitions.
2362 * For each partition enabled in EXT_CSD a block device will be allocatedi
2363 * to provide access to the partition.
2366 static int mmc_blk_alloc_parts(struct mmc_card *card, struct mmc_blk_data *md)
2370 if (!mmc_card_mmc(card))
2373 for (idx = 0; idx < card->nr_parts; idx++) {
2374 if (card->part[idx].size) {
2375 ret = mmc_blk_alloc_part(card, md,
2376 card->part[idx].part_cfg,
2377 card->part[idx].size >> 9,
2378 card->part[idx].force_ro,
2379 card->part[idx].name,
2380 card->part[idx].area_type);
2389 static void mmc_blk_remove_req(struct mmc_blk_data *md)
2391 struct mmc_card *card;
2395 * Flush remaining requests and free queues. It
2396 * is freeing the queue that stops new requests
2397 * from being accepted.
2399 card = md->queue.card;
2400 mmc_cleanup_queue(&md->queue);
2401 if (md->flags & MMC_BLK_PACKED_CMD)
2402 mmc_packed_clean(&md->queue);
2403 if (md->disk->flags & GENHD_FL_UP) {
2404 device_remove_file(disk_to_dev(md->disk), &md->force_ro);
2405 if ((md->area_type & MMC_BLK_DATA_AREA_BOOT) &&
2406 card->ext_csd.boot_ro_lockable)
2407 device_remove_file(disk_to_dev(md->disk),
2408 &md->power_ro_lock);
2410 del_gendisk(md->disk);
2416 static void mmc_blk_remove_parts(struct mmc_card *card,
2417 struct mmc_blk_data *md)
2419 struct list_head *pos, *q;
2420 struct mmc_blk_data *part_md;
2422 __clear_bit(md->name_idx, name_use);
2423 list_for_each_safe(pos, q, &md->part) {
2424 part_md = list_entry(pos, struct mmc_blk_data, part);
2426 mmc_blk_remove_req(part_md);
2430 static int mmc_add_disk(struct mmc_blk_data *md)
2433 struct mmc_card *card = md->queue.card;
2436 md->force_ro.show = force_ro_show;
2437 md->force_ro.store = force_ro_store;
2438 sysfs_attr_init(&md->force_ro.attr);
2439 md->force_ro.attr.name = "force_ro";
2440 md->force_ro.attr.mode = S_IRUGO | S_IWUSR;
2441 ret = device_create_file(disk_to_dev(md->disk), &md->force_ro);
2445 if ((md->area_type & MMC_BLK_DATA_AREA_BOOT) &&
2446 card->ext_csd.boot_ro_lockable) {
2449 if (card->ext_csd.boot_ro_lock & EXT_CSD_BOOT_WP_B_PWR_WP_DIS)
2452 mode = S_IRUGO | S_IWUSR;
2454 md->power_ro_lock.show = power_ro_lock_show;
2455 md->power_ro_lock.store = power_ro_lock_store;
2456 sysfs_attr_init(&md->power_ro_lock.attr);
2457 md->power_ro_lock.attr.mode = mode;
2458 md->power_ro_lock.attr.name =
2459 "ro_lock_until_next_power_on";
2460 ret = device_create_file(disk_to_dev(md->disk),
2461 &md->power_ro_lock);
2463 goto power_ro_lock_fail;
2468 device_remove_file(disk_to_dev(md->disk), &md->force_ro);
2470 del_gendisk(md->disk);
2475 #define CID_MANFID_SANDISK 0x2
2476 #define CID_MANFID_TOSHIBA 0x11
2477 #define CID_MANFID_MICRON 0x13
2478 #define CID_MANFID_SAMSUNG 0x15
2479 #define CID_MANFID_KINGSTON 0x70
2481 static const struct mmc_fixup blk_fixups[] =
2483 MMC_FIXUP("SEM02G", CID_MANFID_SANDISK, 0x100, add_quirk,
2484 MMC_QUIRK_INAND_CMD38),
2485 MMC_FIXUP("SEM04G", CID_MANFID_SANDISK, 0x100, add_quirk,
2486 MMC_QUIRK_INAND_CMD38),
2487 MMC_FIXUP("SEM08G", CID_MANFID_SANDISK, 0x100, add_quirk,
2488 MMC_QUIRK_INAND_CMD38),
2489 MMC_FIXUP("SEM16G", CID_MANFID_SANDISK, 0x100, add_quirk,
2490 MMC_QUIRK_INAND_CMD38),
2491 MMC_FIXUP("SEM32G", CID_MANFID_SANDISK, 0x100, add_quirk,
2492 MMC_QUIRK_INAND_CMD38),
2495 * Some MMC cards experience performance degradation with CMD23
2496 * instead of CMD12-bounded multiblock transfers. For now we'll
2497 * black list what's bad...
2498 * - Certain Toshiba cards.
2500 * N.B. This doesn't affect SD cards.
2502 MMC_FIXUP("SDMB-32", CID_MANFID_SANDISK, CID_OEMID_ANY, add_quirk_mmc,
2503 MMC_QUIRK_BLK_NO_CMD23),
2504 MMC_FIXUP("SDM032", CID_MANFID_SANDISK, CID_OEMID_ANY, add_quirk_mmc,
2505 MMC_QUIRK_BLK_NO_CMD23),
2506 MMC_FIXUP("MMC08G", CID_MANFID_TOSHIBA, CID_OEMID_ANY, add_quirk_mmc,
2507 MMC_QUIRK_BLK_NO_CMD23),
2508 MMC_FIXUP("MMC16G", CID_MANFID_TOSHIBA, CID_OEMID_ANY, add_quirk_mmc,
2509 MMC_QUIRK_BLK_NO_CMD23),
2510 MMC_FIXUP("MMC32G", CID_MANFID_TOSHIBA, CID_OEMID_ANY, add_quirk_mmc,
2511 MMC_QUIRK_BLK_NO_CMD23),
2514 * Some Micron MMC cards needs longer data read timeout than
2517 MMC_FIXUP(CID_NAME_ANY, CID_MANFID_MICRON, 0x200, add_quirk_mmc,
2518 MMC_QUIRK_LONG_READ_TIME),
2521 * On these Samsung MoviNAND parts, performing secure erase or
2522 * secure trim can result in unrecoverable corruption due to a
2525 MMC_FIXUP("M8G2FA", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2526 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2527 MMC_FIXUP("MAG4FA", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2528 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2529 MMC_FIXUP("MBG8FA", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2530 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2531 MMC_FIXUP("MCGAFA", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2532 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2533 MMC_FIXUP("VAL00M", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2534 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2535 MMC_FIXUP("VYL00M", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2536 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2537 MMC_FIXUP("KYL00M", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2538 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2539 MMC_FIXUP("VZL00M", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2540 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2543 * On Some Kingston eMMCs, performing trim can result in
2544 * unrecoverable data conrruption occasionally due to a firmware bug.
2546 MMC_FIXUP("V10008", CID_MANFID_KINGSTON, CID_OEMID_ANY, add_quirk_mmc,
2547 MMC_QUIRK_TRIM_BROKEN),
2548 MMC_FIXUP("V10016", CID_MANFID_KINGSTON, CID_OEMID_ANY, add_quirk_mmc,
2549 MMC_QUIRK_TRIM_BROKEN),
2554 static int mmc_blk_probe(struct mmc_card *card)
2556 struct mmc_blk_data *md, *part_md;
2560 * Check that the card supports the command class(es) we need.
2562 if (!(card->csd.cmdclass & CCC_BLOCK_READ))
2565 mmc_fixup_device(card, blk_fixups);
2567 md = mmc_blk_alloc(card);
2571 string_get_size((u64)get_capacity(md->disk), 512, STRING_UNITS_2,
2572 cap_str, sizeof(cap_str));
2573 pr_info("%s: %s %s %s %s\n",
2574 md->disk->disk_name, mmc_card_id(card), mmc_card_name(card),
2575 cap_str, md->read_only ? "(ro)" : "");
2577 if (mmc_blk_alloc_parts(card, md))
2580 dev_set_drvdata(&card->dev, md);
2582 if (mmc_add_disk(md))
2585 list_for_each_entry(part_md, &md->part, part) {
2586 if (mmc_add_disk(part_md))
2590 pm_runtime_set_autosuspend_delay(&card->dev, 3000);
2591 pm_runtime_use_autosuspend(&card->dev);
2594 * Don't enable runtime PM for SD-combo cards here. Leave that
2595 * decision to be taken during the SDIO init sequence instead.
2597 if (card->type != MMC_TYPE_SD_COMBO) {
2598 pm_runtime_set_active(&card->dev);
2599 pm_runtime_enable(&card->dev);
2605 mmc_blk_remove_parts(card, md);
2606 mmc_blk_remove_req(md);
2610 static void mmc_blk_remove(struct mmc_card *card)
2612 struct mmc_blk_data *md = dev_get_drvdata(&card->dev);
2614 mmc_blk_remove_parts(card, md);
2615 pm_runtime_get_sync(&card->dev);
2616 mmc_claim_host(card->host);
2617 mmc_blk_part_switch(card, md);
2618 mmc_release_host(card->host);
2619 if (card->type != MMC_TYPE_SD_COMBO)
2620 pm_runtime_disable(&card->dev);
2621 pm_runtime_put_noidle(&card->dev);
2622 mmc_blk_remove_req(md);
2623 dev_set_drvdata(&card->dev, NULL);
2626 static int _mmc_blk_suspend(struct mmc_card *card)
2628 struct mmc_blk_data *part_md;
2629 struct mmc_blk_data *md = dev_get_drvdata(&card->dev);
2632 mmc_queue_suspend(&md->queue);
2633 list_for_each_entry(part_md, &md->part, part) {
2634 mmc_queue_suspend(&part_md->queue);
2640 static void mmc_blk_shutdown(struct mmc_card *card)
2642 _mmc_blk_suspend(card);
2645 #ifdef CONFIG_PM_SLEEP
2646 static int mmc_blk_suspend(struct device *dev)
2648 struct mmc_card *card = mmc_dev_to_card(dev);
2650 return _mmc_blk_suspend(card);
2653 static int mmc_blk_resume(struct device *dev)
2655 struct mmc_blk_data *part_md;
2656 struct mmc_blk_data *md = dev_get_drvdata(dev);
2660 * Resume involves the card going into idle state,
2661 * so current partition is always the main one.
2663 md->part_curr = md->part_type;
2664 mmc_queue_resume(&md->queue);
2665 list_for_each_entry(part_md, &md->part, part) {
2666 mmc_queue_resume(&part_md->queue);
2673 static SIMPLE_DEV_PM_OPS(mmc_blk_pm_ops, mmc_blk_suspend, mmc_blk_resume);
2675 static struct mmc_driver mmc_driver = {
2678 .pm = &mmc_blk_pm_ops,
2680 .probe = mmc_blk_probe,
2681 .remove = mmc_blk_remove,
2682 .shutdown = mmc_blk_shutdown,
2685 static int __init mmc_blk_init(void)
2689 if (perdev_minors != CONFIG_MMC_BLOCK_MINORS)
2690 pr_info("mmcblk: using %d minors per device\n", perdev_minors);
2692 max_devices = min(MAX_DEVICES, (1 << MINORBITS) / perdev_minors);
2694 res = register_blkdev(MMC_BLOCK_MAJOR, "mmc");
2698 res = mmc_register_driver(&mmc_driver);
2704 unregister_blkdev(MMC_BLOCK_MAJOR, "mmc");
2709 static void __exit mmc_blk_exit(void)
2711 mmc_unregister_driver(&mmc_driver);
2712 unregister_blkdev(MMC_BLOCK_MAJOR, "mmc");
2715 module_init(mmc_blk_init);
2716 module_exit(mmc_blk_exit);
2718 MODULE_LICENSE("GPL");
2719 MODULE_DESCRIPTION("Multimedia Card (MMC) block device driver");