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 <trace/events/mmc.h>
41 #include <linux/mmc/ioctl.h>
42 #include <linux/mmc/card.h>
43 #include <linux/mmc/host.h>
44 #include <linux/mmc/mmc.h>
45 #include <linux/mmc/sd.h>
47 #include <asm/uaccess.h>
51 MODULE_ALIAS("mmc:block");
52 #ifdef MODULE_PARAM_PREFIX
53 #undef MODULE_PARAM_PREFIX
55 #define MODULE_PARAM_PREFIX "mmcblk."
57 #define INAND_CMD38_ARG_EXT_CSD 113
58 #define INAND_CMD38_ARG_ERASE 0x00
59 #define INAND_CMD38_ARG_TRIM 0x01
60 #define INAND_CMD38_ARG_SECERASE 0x80
61 #define INAND_CMD38_ARG_SECTRIM1 0x81
62 #define INAND_CMD38_ARG_SECTRIM2 0x88
63 #define MMC_BLK_TIMEOUT_MS (10 * 60 * 1000) /* 10 minute timeout */
64 #define MMC_SANITIZE_REQ_TIMEOUT 240000
65 #define MMC_EXTRACT_INDEX_FROM_ARG(x) ((x & 0x00FF0000) >> 16)
67 #define mmc_req_rel_wr(req) ((req->cmd_flags & REQ_FUA) && \
68 (rq_data_dir(req) == WRITE))
69 #define PACKED_CMD_VER 0x01
70 #define PACKED_CMD_WR 0x02
72 static DEFINE_MUTEX(block_mutex);
75 * The defaults come from config options but can be overriden by module
78 static int perdev_minors = CONFIG_MMC_BLOCK_MINORS;
81 * We've only got one major, so number of mmcblk devices is
82 * limited to (1 << 20) / number of minors per device. It is also
83 * currently limited by the size of the static bitmaps below.
85 static int max_devices;
87 #define MAX_DEVICES 256
89 /* TODO: Replace these with struct ida */
90 static DECLARE_BITMAP(dev_use, MAX_DEVICES);
91 static DECLARE_BITMAP(name_use, MAX_DEVICES);
94 * There is one mmc_blk_data per slot.
99 struct mmc_queue queue;
100 struct list_head part;
103 #define MMC_BLK_CMD23 (1 << 0) /* Can do SET_BLOCK_COUNT for multiblock */
104 #define MMC_BLK_REL_WR (1 << 1) /* MMC Reliable write support */
105 #define MMC_BLK_PACKED_CMD (1 << 2) /* MMC packed command support */
108 unsigned int read_only;
109 unsigned int part_type;
110 unsigned int name_idx;
111 unsigned int reset_done;
112 #define MMC_BLK_READ BIT(0)
113 #define MMC_BLK_WRITE BIT(1)
114 #define MMC_BLK_DISCARD BIT(2)
115 #define MMC_BLK_SECDISCARD BIT(3)
118 * Only set in main mmc_blk_data associated
119 * with mmc_card with dev_set_drvdata, and keeps
120 * track of the current selected device partition.
122 unsigned int part_curr;
123 struct device_attribute force_ro;
124 struct device_attribute power_ro_lock;
128 static DEFINE_MUTEX(open_lock);
131 MMC_PACKED_NR_IDX = -1,
133 MMC_PACKED_NR_SINGLE,
136 module_param(perdev_minors, int, 0444);
137 MODULE_PARM_DESC(perdev_minors, "Minors numbers to allocate per device");
139 static inline int mmc_blk_part_switch(struct mmc_card *card,
140 struct mmc_blk_data *md);
141 static int get_card_status(struct mmc_card *card, u32 *status, int retries);
143 static inline void mmc_blk_clear_packed(struct mmc_queue_req *mqrq)
145 struct mmc_packed *packed = mqrq->packed;
149 mqrq->cmd_type = MMC_PACKED_NONE;
150 packed->nr_entries = MMC_PACKED_NR_ZERO;
151 packed->idx_failure = MMC_PACKED_NR_IDX;
156 static struct mmc_blk_data *mmc_blk_get(struct gendisk *disk)
158 struct mmc_blk_data *md;
160 mutex_lock(&open_lock);
161 md = disk->private_data;
162 if (md && md->usage == 0)
166 mutex_unlock(&open_lock);
171 static inline int mmc_get_devidx(struct gendisk *disk)
173 int devidx = disk->first_minor / perdev_minors;
177 static void mmc_blk_put(struct mmc_blk_data *md)
179 mutex_lock(&open_lock);
181 if (md->usage == 0) {
182 int devidx = mmc_get_devidx(md->disk);
183 blk_cleanup_queue(md->queue.queue);
185 __clear_bit(devidx, dev_use);
190 mutex_unlock(&open_lock);
193 static ssize_t power_ro_lock_show(struct device *dev,
194 struct device_attribute *attr, char *buf)
197 struct mmc_blk_data *md = mmc_blk_get(dev_to_disk(dev));
198 struct mmc_card *card = md->queue.card;
201 if (card->ext_csd.boot_ro_lock & EXT_CSD_BOOT_WP_B_PERM_WP_EN)
203 else if (card->ext_csd.boot_ro_lock & EXT_CSD_BOOT_WP_B_PWR_WP_EN)
206 ret = snprintf(buf, PAGE_SIZE, "%d\n", locked);
213 static ssize_t power_ro_lock_store(struct device *dev,
214 struct device_attribute *attr, const char *buf, size_t count)
217 struct mmc_blk_data *md, *part_md;
218 struct mmc_card *card;
221 if (kstrtoul(buf, 0, &set))
227 md = mmc_blk_get(dev_to_disk(dev));
228 card = md->queue.card;
232 ret = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_BOOT_WP,
233 card->ext_csd.boot_ro_lock |
234 EXT_CSD_BOOT_WP_B_PWR_WP_EN,
235 card->ext_csd.part_time);
237 pr_err("%s: Locking boot partition ro until next power on failed: %d\n", md->disk->disk_name, ret);
239 card->ext_csd.boot_ro_lock |= EXT_CSD_BOOT_WP_B_PWR_WP_EN;
244 pr_info("%s: Locking boot partition ro until next power on\n",
245 md->disk->disk_name);
246 set_disk_ro(md->disk, 1);
248 list_for_each_entry(part_md, &md->part, part)
249 if (part_md->area_type == MMC_BLK_DATA_AREA_BOOT) {
250 pr_info("%s: Locking boot partition ro until next power on\n", part_md->disk->disk_name);
251 set_disk_ro(part_md->disk, 1);
259 static ssize_t force_ro_show(struct device *dev, struct device_attribute *attr,
263 struct mmc_blk_data *md = mmc_blk_get(dev_to_disk(dev));
265 ret = snprintf(buf, PAGE_SIZE, "%d\n",
266 get_disk_ro(dev_to_disk(dev)) ^
272 static ssize_t force_ro_store(struct device *dev, struct device_attribute *attr,
273 const char *buf, size_t count)
277 struct mmc_blk_data *md = mmc_blk_get(dev_to_disk(dev));
278 unsigned long set = simple_strtoul(buf, &end, 0);
284 set_disk_ro(dev_to_disk(dev), set || md->read_only);
291 static int mmc_blk_open(struct block_device *bdev, fmode_t mode)
293 struct mmc_blk_data *md = mmc_blk_get(bdev->bd_disk);
296 mutex_lock(&block_mutex);
299 check_disk_change(bdev);
302 if ((mode & FMODE_WRITE) && md->read_only) {
307 mutex_unlock(&block_mutex);
312 static void mmc_blk_release(struct gendisk *disk, fmode_t mode)
314 struct mmc_blk_data *md = disk->private_data;
316 mutex_lock(&block_mutex);
318 mutex_unlock(&block_mutex);
322 mmc_blk_getgeo(struct block_device *bdev, struct hd_geometry *geo)
324 geo->cylinders = get_capacity(bdev->bd_disk) / (4 * 16);
330 struct mmc_blk_ioc_data {
331 struct mmc_ioc_cmd ic;
336 static struct mmc_blk_ioc_data *mmc_blk_ioctl_copy_from_user(
337 struct mmc_ioc_cmd __user *user)
339 struct mmc_blk_ioc_data *idata;
342 idata = kzalloc(sizeof(*idata), GFP_KERNEL);
348 if (copy_from_user(&idata->ic, user, sizeof(idata->ic))) {
353 idata->buf_bytes = (u64) idata->ic.blksz * idata->ic.blocks;
354 if (idata->buf_bytes > MMC_IOC_MAX_BYTES) {
359 if (!idata->buf_bytes)
362 idata->buf = kzalloc(idata->buf_bytes, GFP_KERNEL);
368 if (copy_from_user(idata->buf, (void __user *)(unsigned long)
369 idata->ic.data_ptr, idata->buf_bytes)) {
384 static int mmc_blk_ioctl_copy_to_user(struct mmc_ioc_cmd __user *ic_ptr,
385 struct mmc_blk_ioc_data *idata)
387 struct mmc_ioc_cmd *ic = &idata->ic;
389 if (copy_to_user(&(ic_ptr->response), ic->response,
390 sizeof(ic->response)))
393 if (!idata->ic.write_flag) {
394 if (copy_to_user((void __user *)(unsigned long)ic->data_ptr,
395 idata->buf, idata->buf_bytes))
402 static int ioctl_rpmb_card_status_poll(struct mmc_card *card, u32 *status,
408 if (!status || !retries_max)
412 err = get_card_status(card, status, 5);
416 if (!R1_STATUS(*status) &&
417 (R1_CURRENT_STATE(*status) != R1_STATE_PRG))
418 break; /* RPMB programming operation complete */
421 * Rechedule to give the MMC device a chance to continue
422 * processing the previous command without being polled too
425 usleep_range(1000, 5000);
426 } while (++retry_count < retries_max);
428 if (retry_count == retries_max)
434 static int ioctl_do_sanitize(struct mmc_card *card)
438 if (!mmc_can_sanitize(card)) {
439 pr_warn("%s: %s - SANITIZE is not supported\n",
440 mmc_hostname(card->host), __func__);
445 pr_debug("%s: %s - SANITIZE IN PROGRESS...\n",
446 mmc_hostname(card->host), __func__);
448 trace_mmc_blk_erase_start(EXT_CSD_SANITIZE_START, 0, 0);
449 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
450 EXT_CSD_SANITIZE_START, 1,
451 MMC_SANITIZE_REQ_TIMEOUT);
452 trace_mmc_blk_erase_end(EXT_CSD_SANITIZE_START, 0, 0);
455 pr_err("%s: %s - EXT_CSD_SANITIZE_START failed. err=%d\n",
456 mmc_hostname(card->host), __func__, err);
458 pr_debug("%s: %s - SANITIZE COMPLETED\n", mmc_hostname(card->host),
464 static int __mmc_blk_ioctl_cmd(struct mmc_card *card, struct mmc_blk_data *md,
465 struct mmc_blk_ioc_data *idata)
467 struct mmc_command cmd = {0};
468 struct mmc_data data = {0};
469 struct mmc_request mrq = {NULL};
470 struct scatterlist sg;
475 if (!card || !md || !idata)
478 if (md->area_type & MMC_BLK_DATA_AREA_RPMB)
481 cmd.opcode = idata->ic.opcode;
482 cmd.arg = idata->ic.arg;
483 cmd.flags = idata->ic.flags;
485 if (idata->buf_bytes) {
488 data.blksz = idata->ic.blksz;
489 data.blocks = idata->ic.blocks;
491 sg_init_one(data.sg, idata->buf, idata->buf_bytes);
493 if (idata->ic.write_flag)
494 data.flags = MMC_DATA_WRITE;
496 data.flags = MMC_DATA_READ;
498 /* data.flags must already be set before doing this. */
499 mmc_set_data_timeout(&data, card);
501 /* Allow overriding the timeout_ns for empirical tuning. */
502 if (idata->ic.data_timeout_ns)
503 data.timeout_ns = idata->ic.data_timeout_ns;
505 if ((cmd.flags & MMC_RSP_R1B) == MMC_RSP_R1B) {
507 * Pretend this is a data transfer and rely on the
508 * host driver to compute timeout. When all host
509 * drivers support cmd.cmd_timeout for R1B, this
513 * cmd.cmd_timeout = idata->ic.cmd_timeout_ms;
515 data.timeout_ns = idata->ic.cmd_timeout_ms * 1000000;
523 err = mmc_blk_part_switch(card, md);
527 if (idata->ic.is_acmd) {
528 err = mmc_app_cmd(card->host, card);
534 err = mmc_set_blockcount(card, data.blocks,
535 idata->ic.write_flag & (1 << 31));
540 if ((MMC_EXTRACT_INDEX_FROM_ARG(cmd.arg) == EXT_CSD_SANITIZE_START) &&
541 (cmd.opcode == MMC_SWITCH)) {
542 err = ioctl_do_sanitize(card);
545 pr_err("%s: ioctl_do_sanitize() failed. err = %d",
551 mmc_wait_for_req(card->host, &mrq);
554 dev_err(mmc_dev(card->host), "%s: cmd error %d\n",
555 __func__, cmd.error);
559 dev_err(mmc_dev(card->host), "%s: data error %d\n",
560 __func__, data.error);
565 * According to the SD specs, some commands require a delay after
566 * issuing the command.
568 if (idata->ic.postsleep_min_us)
569 usleep_range(idata->ic.postsleep_min_us, idata->ic.postsleep_max_us);
571 memcpy(&(idata->ic.response), cmd.resp, sizeof(cmd.resp));
575 * Ensure RPMB command has completed by polling CMD13
578 err = ioctl_rpmb_card_status_poll(card, &status, 5);
580 dev_err(mmc_dev(card->host),
581 "%s: Card Status=0x%08X, error %d\n",
582 __func__, status, err);
588 static int mmc_blk_ioctl_cmd(struct block_device *bdev,
589 struct mmc_ioc_cmd __user *ic_ptr)
591 struct mmc_blk_ioc_data *idata;
592 struct mmc_blk_data *md;
593 struct mmc_card *card;
594 int err = 0, ioc_err = 0;
597 * The caller must have CAP_SYS_RAWIO, and must be calling this on the
598 * whole block device, not on a partition. This prevents overspray
599 * between sibling partitions.
601 if ((!capable(CAP_SYS_RAWIO)) || (bdev != bdev->bd_contains))
604 idata = mmc_blk_ioctl_copy_from_user(ic_ptr);
606 return PTR_ERR(idata);
608 md = mmc_blk_get(bdev->bd_disk);
614 card = md->queue.card;
622 ioc_err = __mmc_blk_ioctl_cmd(card, md, idata);
626 err = mmc_blk_ioctl_copy_to_user(ic_ptr, idata);
633 return ioc_err ? ioc_err : err;
636 static int mmc_blk_ioctl_multi_cmd(struct block_device *bdev,
637 struct mmc_ioc_multi_cmd __user *user)
639 struct mmc_blk_ioc_data **idata = NULL;
640 struct mmc_ioc_cmd __user *cmds = user->cmds;
641 struct mmc_card *card;
642 struct mmc_blk_data *md;
643 int i, err = 0, ioc_err = 0;
647 * The caller must have CAP_SYS_RAWIO, and must be calling this on the
648 * whole block device, not on a partition. This prevents overspray
649 * between sibling partitions.
651 if ((!capable(CAP_SYS_RAWIO)) || (bdev != bdev->bd_contains))
654 if (copy_from_user(&num_of_cmds, &user->num_of_cmds,
655 sizeof(num_of_cmds)))
658 if (num_of_cmds > MMC_IOC_MAX_CMDS)
661 idata = kcalloc(num_of_cmds, sizeof(*idata), GFP_KERNEL);
665 for (i = 0; i < num_of_cmds; i++) {
666 idata[i] = mmc_blk_ioctl_copy_from_user(&cmds[i]);
667 if (IS_ERR(idata[i])) {
668 err = PTR_ERR(idata[i]);
674 md = mmc_blk_get(bdev->bd_disk);
678 card = md->queue.card;
686 for (i = 0; i < num_of_cmds && !ioc_err; i++)
687 ioc_err = __mmc_blk_ioctl_cmd(card, md, idata[i]);
691 /* copy to user if data and response */
692 for (i = 0; i < num_of_cmds && !err; i++)
693 err = mmc_blk_ioctl_copy_to_user(&cmds[i], idata[i]);
698 for (i = 0; i < num_of_cmds; i++) {
699 kfree(idata[i]->buf);
703 return ioc_err ? ioc_err : err;
706 static int mmc_blk_ioctl(struct block_device *bdev, fmode_t mode,
707 unsigned int cmd, unsigned long arg)
711 return mmc_blk_ioctl_cmd(bdev,
712 (struct mmc_ioc_cmd __user *)arg);
713 case MMC_IOC_MULTI_CMD:
714 return mmc_blk_ioctl_multi_cmd(bdev,
715 (struct mmc_ioc_multi_cmd __user *)arg);
722 static int mmc_blk_compat_ioctl(struct block_device *bdev, fmode_t mode,
723 unsigned int cmd, unsigned long arg)
725 return mmc_blk_ioctl(bdev, mode, cmd, (unsigned long) compat_ptr(arg));
729 static const struct block_device_operations mmc_bdops = {
730 .open = mmc_blk_open,
731 .release = mmc_blk_release,
732 .getgeo = mmc_blk_getgeo,
733 .owner = THIS_MODULE,
734 .ioctl = mmc_blk_ioctl,
736 .compat_ioctl = mmc_blk_compat_ioctl,
740 static inline int mmc_blk_part_switch(struct mmc_card *card,
741 struct mmc_blk_data *md)
744 struct mmc_blk_data *main_md = dev_get_drvdata(&card->dev);
746 if (main_md->part_curr == md->part_type)
749 if (mmc_card_mmc(card)) {
750 u8 part_config = card->ext_csd.part_config;
752 part_config &= ~EXT_CSD_PART_CONFIG_ACC_MASK;
753 part_config |= md->part_type;
755 ret = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
756 EXT_CSD_PART_CONFIG, part_config,
757 card->ext_csd.part_time);
761 card->ext_csd.part_config = part_config;
764 main_md->part_curr = md->part_type;
768 static u32 mmc_sd_num_wr_blocks(struct mmc_card *card)
774 struct mmc_request mrq = {NULL};
775 struct mmc_command cmd = {0};
776 struct mmc_data data = {0};
778 struct scatterlist sg;
780 cmd.opcode = MMC_APP_CMD;
781 cmd.arg = card->rca << 16;
782 cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC;
784 err = mmc_wait_for_cmd(card->host, &cmd, 0);
787 if (!mmc_host_is_spi(card->host) && !(cmd.resp[0] & R1_APP_CMD))
790 memset(&cmd, 0, sizeof(struct mmc_command));
792 cmd.opcode = SD_APP_SEND_NUM_WR_BLKS;
794 cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC;
798 data.flags = MMC_DATA_READ;
801 mmc_set_data_timeout(&data, card);
806 blocks = kmalloc(4, GFP_KERNEL);
810 sg_init_one(&sg, blocks, 4);
812 mmc_wait_for_req(card->host, &mrq);
814 result = ntohl(*blocks);
817 if (cmd.error || data.error)
823 static int get_card_status(struct mmc_card *card, u32 *status, int retries)
825 struct mmc_command cmd = {0};
828 cmd.opcode = MMC_SEND_STATUS;
829 if (!mmc_host_is_spi(card->host))
830 cmd.arg = card->rca << 16;
831 cmd.flags = MMC_RSP_SPI_R2 | MMC_RSP_R1 | MMC_CMD_AC;
832 err = mmc_wait_for_cmd(card->host, &cmd, retries);
834 *status = cmd.resp[0];
838 static int card_busy_detect(struct mmc_card *card, unsigned int timeout_ms,
839 bool hw_busy_detect, struct request *req, int *gen_err)
841 unsigned long timeout = jiffies + msecs_to_jiffies(timeout_ms);
846 err = get_card_status(card, &status, 5);
848 pr_err("%s: error %d requesting status\n",
849 req->rq_disk->disk_name, err);
853 if (status & R1_ERROR) {
854 pr_err("%s: %s: error sending status cmd, status %#x\n",
855 req->rq_disk->disk_name, __func__, status);
859 /* We may rely on the host hw to handle busy detection.*/
860 if ((card->host->caps & MMC_CAP_WAIT_WHILE_BUSY) &&
865 * Timeout if the device never becomes ready for data and never
866 * leaves the program state.
868 if (time_after(jiffies, timeout)) {
869 pr_err("%s: Card stuck in programming state! %s %s\n",
870 mmc_hostname(card->host),
871 req->rq_disk->disk_name, __func__);
876 * Some cards mishandle the status bits,
877 * so make sure to check both the busy
878 * indication and the card state.
880 } while (!(status & R1_READY_FOR_DATA) ||
881 (R1_CURRENT_STATE(status) == R1_STATE_PRG));
886 static int send_stop(struct mmc_card *card, unsigned int timeout_ms,
887 struct request *req, int *gen_err, u32 *stop_status)
889 struct mmc_host *host = card->host;
890 struct mmc_command cmd = {0};
892 bool use_r1b_resp = rq_data_dir(req) == WRITE;
895 * Normally we use R1B responses for WRITE, but in cases where the host
896 * has specified a max_busy_timeout we need to validate it. A failure
897 * means we need to prevent the host from doing hw busy detection, which
898 * is done by converting to a R1 response instead.
900 if (host->max_busy_timeout && (timeout_ms > host->max_busy_timeout))
901 use_r1b_resp = false;
903 cmd.opcode = MMC_STOP_TRANSMISSION;
905 cmd.flags = MMC_RSP_SPI_R1B | MMC_RSP_R1B | MMC_CMD_AC;
906 cmd.busy_timeout = timeout_ms;
908 cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC;
911 err = mmc_wait_for_cmd(host, &cmd, 5);
915 *stop_status = cmd.resp[0];
917 /* No need to check card status in case of READ. */
918 if (rq_data_dir(req) == READ)
921 if (!mmc_host_is_spi(host) &&
922 (*stop_status & R1_ERROR)) {
923 pr_err("%s: %s: general error sending stop command, resp %#x\n",
924 req->rq_disk->disk_name, __func__, *stop_status);
928 return card_busy_detect(card, timeout_ms, use_r1b_resp, req, gen_err);
931 #define ERR_NOMEDIUM 3
934 #define ERR_CONTINUE 0
936 static int mmc_blk_cmd_error(struct request *req, const char *name, int error,
937 bool status_valid, u32 status)
941 /* response crc error, retry the r/w cmd */
942 pr_err("%s: %s sending %s command, card status %#x\n",
943 req->rq_disk->disk_name, "response CRC error",
948 pr_err("%s: %s sending %s command, card status %#x\n",
949 req->rq_disk->disk_name, "timed out", name, status);
951 /* If the status cmd initially failed, retry the r/w cmd */
953 pr_err("%s: status not valid, retrying timeout\n", req->rq_disk->disk_name);
957 * If it was a r/w cmd crc error, or illegal command
958 * (eg, issued in wrong state) then retry - we should
959 * have corrected the state problem above.
961 if (status & (R1_COM_CRC_ERROR | R1_ILLEGAL_COMMAND)) {
962 pr_err("%s: command error, retrying timeout\n", req->rq_disk->disk_name);
966 /* Otherwise abort the command */
967 pr_err("%s: not retrying timeout\n", req->rq_disk->disk_name);
971 /* We don't understand the error code the driver gave us */
972 pr_err("%s: unknown error %d sending read/write command, card status %#x\n",
973 req->rq_disk->disk_name, error, status);
979 * Initial r/w and stop cmd error recovery.
980 * We don't know whether the card received the r/w cmd or not, so try to
981 * restore things back to a sane state. Essentially, we do this as follows:
982 * - Obtain card status. If the first attempt to obtain card status fails,
983 * the status word will reflect the failed status cmd, not the failed
984 * r/w cmd. If we fail to obtain card status, it suggests we can no
985 * longer communicate with the card.
986 * - Check the card state. If the card received the cmd but there was a
987 * transient problem with the response, it might still be in a data transfer
988 * mode. Try to send it a stop command. If this fails, we can't recover.
989 * - If the r/w cmd failed due to a response CRC error, it was probably
990 * transient, so retry the cmd.
991 * - If the r/w cmd timed out, but we didn't get the r/w cmd status, retry.
992 * - If the r/w cmd timed out, and the r/w cmd failed due to CRC error or
993 * illegal cmd, retry.
994 * Otherwise we don't understand what happened, so abort.
996 static int mmc_blk_cmd_recovery(struct mmc_card *card, struct request *req,
997 struct mmc_blk_request *brq, int *ecc_err, int *gen_err)
999 bool prev_cmd_status_valid = true;
1000 u32 status, stop_status = 0;
1003 if (mmc_card_removed(card))
1004 return ERR_NOMEDIUM;
1007 * Try to get card status which indicates both the card state
1008 * and why there was no response. If the first attempt fails,
1009 * we can't be sure the returned status is for the r/w command.
1011 for (retry = 2; retry >= 0; retry--) {
1012 err = get_card_status(card, &status, 0);
1016 /* Re-tune if needed */
1017 mmc_retune_recheck(card->host);
1019 prev_cmd_status_valid = false;
1020 pr_err("%s: error %d sending status command, %sing\n",
1021 req->rq_disk->disk_name, err, retry ? "retry" : "abort");
1024 /* We couldn't get a response from the card. Give up. */
1026 /* Check if the card is removed */
1027 if (mmc_detect_card_removed(card->host))
1028 return ERR_NOMEDIUM;
1032 /* Flag ECC errors */
1033 if ((status & R1_CARD_ECC_FAILED) ||
1034 (brq->stop.resp[0] & R1_CARD_ECC_FAILED) ||
1035 (brq->cmd.resp[0] & R1_CARD_ECC_FAILED))
1038 /* Flag General errors */
1039 if (!mmc_host_is_spi(card->host) && rq_data_dir(req) != READ)
1040 if ((status & R1_ERROR) ||
1041 (brq->stop.resp[0] & R1_ERROR)) {
1042 pr_err("%s: %s: general error sending stop or status command, stop cmd response %#x, card status %#x\n",
1043 req->rq_disk->disk_name, __func__,
1044 brq->stop.resp[0], status);
1049 * Check the current card state. If it is in some data transfer
1050 * mode, tell it to stop (and hopefully transition back to TRAN.)
1052 if (R1_CURRENT_STATE(status) == R1_STATE_DATA ||
1053 R1_CURRENT_STATE(status) == R1_STATE_RCV) {
1054 err = send_stop(card,
1055 DIV_ROUND_UP(brq->data.timeout_ns, 1000000),
1056 req, gen_err, &stop_status);
1058 pr_err("%s: error %d sending stop command\n",
1059 req->rq_disk->disk_name, err);
1061 * If the stop cmd also timed out, the card is probably
1062 * not present, so abort. Other errors are bad news too.
1067 if (stop_status & R1_CARD_ECC_FAILED)
1071 /* Check for set block count errors */
1073 return mmc_blk_cmd_error(req, "SET_BLOCK_COUNT", brq->sbc.error,
1074 prev_cmd_status_valid, status);
1076 /* Check for r/w command errors */
1078 return mmc_blk_cmd_error(req, "r/w cmd", brq->cmd.error,
1079 prev_cmd_status_valid, status);
1082 if (!brq->stop.error)
1083 return ERR_CONTINUE;
1085 /* Now for stop errors. These aren't fatal to the transfer. */
1086 pr_info("%s: error %d sending stop command, original cmd response %#x, card status %#x\n",
1087 req->rq_disk->disk_name, brq->stop.error,
1088 brq->cmd.resp[0], status);
1091 * Subsitute in our own stop status as this will give the error
1092 * state which happened during the execution of the r/w command.
1095 brq->stop.resp[0] = stop_status;
1096 brq->stop.error = 0;
1098 return ERR_CONTINUE;
1101 static int mmc_blk_reset(struct mmc_blk_data *md, struct mmc_host *host,
1106 if (md->reset_done & type)
1109 md->reset_done |= type;
1110 err = mmc_hw_reset(host);
1111 /* Ensure we switch back to the correct partition */
1112 if (err != -EOPNOTSUPP) {
1113 struct mmc_blk_data *main_md =
1114 dev_get_drvdata(&host->card->dev);
1117 main_md->part_curr = main_md->part_type;
1118 part_err = mmc_blk_part_switch(host->card, md);
1121 * We have failed to get back into the correct
1122 * partition, so we need to abort the whole request.
1130 static inline void mmc_blk_reset_success(struct mmc_blk_data *md, int type)
1132 md->reset_done &= ~type;
1135 int mmc_access_rpmb(struct mmc_queue *mq)
1137 struct mmc_blk_data *md = mq->data;
1139 * If this is a RPMB partition access, return ture
1141 if (md && md->part_type == EXT_CSD_PART_CONFIG_ACC_RPMB)
1147 static int mmc_blk_issue_discard_rq(struct mmc_queue *mq, struct request *req)
1149 struct mmc_blk_data *md = mq->data;
1150 struct mmc_card *card = md->queue.card;
1151 unsigned int from, nr, arg;
1152 int err = 0, type = MMC_BLK_DISCARD;
1154 if (!mmc_can_erase(card)) {
1159 from = blk_rq_pos(req);
1160 nr = blk_rq_sectors(req);
1162 if (mmc_can_discard(card))
1163 arg = MMC_DISCARD_ARG;
1164 else if (mmc_can_trim(card))
1167 arg = MMC_ERASE_ARG;
1169 if (card->quirks & MMC_QUIRK_INAND_CMD38) {
1170 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1171 INAND_CMD38_ARG_EXT_CSD,
1172 arg == MMC_TRIM_ARG ?
1173 INAND_CMD38_ARG_TRIM :
1174 INAND_CMD38_ARG_ERASE,
1179 err = mmc_erase(card, from, nr, arg);
1181 if (err == -EIO && !mmc_blk_reset(md, card->host, type))
1184 mmc_blk_reset_success(md, type);
1185 blk_end_request(req, err, blk_rq_bytes(req));
1190 static int mmc_blk_issue_secdiscard_rq(struct mmc_queue *mq,
1191 struct request *req)
1193 struct mmc_blk_data *md = mq->data;
1194 struct mmc_card *card = md->queue.card;
1195 unsigned int from, nr, arg;
1196 int err = 0, type = MMC_BLK_SECDISCARD;
1198 if (!(mmc_can_secure_erase_trim(card))) {
1203 from = blk_rq_pos(req);
1204 nr = blk_rq_sectors(req);
1206 if (mmc_can_trim(card) && !mmc_erase_group_aligned(card, from, nr))
1207 arg = MMC_SECURE_TRIM1_ARG;
1209 arg = MMC_SECURE_ERASE_ARG;
1212 if (card->quirks & MMC_QUIRK_INAND_CMD38) {
1213 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1214 INAND_CMD38_ARG_EXT_CSD,
1215 arg == MMC_SECURE_TRIM1_ARG ?
1216 INAND_CMD38_ARG_SECTRIM1 :
1217 INAND_CMD38_ARG_SECERASE,
1223 err = mmc_erase(card, from, nr, arg);
1229 if (arg == MMC_SECURE_TRIM1_ARG) {
1230 if (card->quirks & MMC_QUIRK_INAND_CMD38) {
1231 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1232 INAND_CMD38_ARG_EXT_CSD,
1233 INAND_CMD38_ARG_SECTRIM2,
1239 err = mmc_erase(card, from, nr, MMC_SECURE_TRIM2_ARG);
1247 if (err && !mmc_blk_reset(md, card->host, type))
1250 mmc_blk_reset_success(md, type);
1252 blk_end_request(req, err, blk_rq_bytes(req));
1257 static int mmc_blk_issue_flush(struct mmc_queue *mq, struct request *req)
1259 struct mmc_blk_data *md = mq->data;
1260 struct mmc_card *card = md->queue.card;
1263 ret = mmc_flush_cache(card);
1267 blk_end_request_all(req, ret);
1273 * Reformat current write as a reliable write, supporting
1274 * both legacy and the enhanced reliable write MMC cards.
1275 * In each transfer we'll handle only as much as a single
1276 * reliable write can handle, thus finish the request in
1277 * partial completions.
1279 static inline void mmc_apply_rel_rw(struct mmc_blk_request *brq,
1280 struct mmc_card *card,
1281 struct request *req)
1283 if (!(card->ext_csd.rel_param & EXT_CSD_WR_REL_PARAM_EN)) {
1284 /* Legacy mode imposes restrictions on transfers. */
1285 if (!IS_ALIGNED(brq->cmd.arg, card->ext_csd.rel_sectors))
1286 brq->data.blocks = 1;
1288 if (brq->data.blocks > card->ext_csd.rel_sectors)
1289 brq->data.blocks = card->ext_csd.rel_sectors;
1290 else if (brq->data.blocks < card->ext_csd.rel_sectors)
1291 brq->data.blocks = 1;
1295 #define CMD_ERRORS \
1296 (R1_OUT_OF_RANGE | /* Command argument out of range */ \
1297 R1_ADDRESS_ERROR | /* Misaligned address */ \
1298 R1_BLOCK_LEN_ERROR | /* Transferred block length incorrect */\
1299 R1_WP_VIOLATION | /* Tried to write to protected block */ \
1300 R1_CC_ERROR | /* Card controller error */ \
1301 R1_ERROR) /* General/unknown error */
1303 static int mmc_blk_err_check(struct mmc_card *card,
1304 struct mmc_async_req *areq)
1306 struct mmc_queue_req *mq_mrq = container_of(areq, struct mmc_queue_req,
1308 struct mmc_blk_request *brq = &mq_mrq->brq;
1309 struct request *req = mq_mrq->req;
1310 int need_retune = card->host->need_retune;
1311 int ecc_err = 0, gen_err = 0;
1314 * sbc.error indicates a problem with the set block count
1315 * command. No data will have been transferred.
1317 * cmd.error indicates a problem with the r/w command. No
1318 * data will have been transferred.
1320 * stop.error indicates a problem with the stop command. Data
1321 * may have been transferred, or may still be transferring.
1323 if (brq->sbc.error || brq->cmd.error || brq->stop.error ||
1325 switch (mmc_blk_cmd_recovery(card, req, brq, &ecc_err, &gen_err)) {
1327 return MMC_BLK_RETRY;
1329 return MMC_BLK_ABORT;
1331 return MMC_BLK_NOMEDIUM;
1338 * Check for errors relating to the execution of the
1339 * initial command - such as address errors. No data
1340 * has been transferred.
1342 if (brq->cmd.resp[0] & CMD_ERRORS) {
1343 pr_err("%s: r/w command failed, status = %#x\n",
1344 req->rq_disk->disk_name, brq->cmd.resp[0]);
1345 return MMC_BLK_ABORT;
1349 * Everything else is either success, or a data error of some
1350 * kind. If it was a write, we may have transitioned to
1351 * program mode, which we have to wait for it to complete.
1353 if (!mmc_host_is_spi(card->host) && rq_data_dir(req) != READ) {
1356 /* Check stop command response */
1357 if (brq->stop.resp[0] & R1_ERROR) {
1358 pr_err("%s: %s: general error sending stop command, stop cmd response %#x\n",
1359 req->rq_disk->disk_name, __func__,
1364 err = card_busy_detect(card, MMC_BLK_TIMEOUT_MS, false, req,
1367 return MMC_BLK_CMD_ERR;
1370 /* if general error occurs, retry the write operation. */
1372 pr_warn("%s: retrying write for general error\n",
1373 req->rq_disk->disk_name);
1374 return MMC_BLK_RETRY;
1377 if (brq->data.error) {
1378 if (need_retune && !brq->retune_retry_done) {
1379 pr_info("%s: retrying because a re-tune was needed\n",
1380 req->rq_disk->disk_name);
1381 brq->retune_retry_done = 1;
1382 return MMC_BLK_RETRY;
1384 pr_err("%s: error %d transferring data, sector %u, nr %u, cmd response %#x, card status %#x\n",
1385 req->rq_disk->disk_name, brq->data.error,
1386 (unsigned)blk_rq_pos(req),
1387 (unsigned)blk_rq_sectors(req),
1388 brq->cmd.resp[0], brq->stop.resp[0]);
1390 if (rq_data_dir(req) == READ) {
1392 return MMC_BLK_ECC_ERR;
1393 return MMC_BLK_DATA_ERR;
1395 return MMC_BLK_CMD_ERR;
1399 if (!brq->data.bytes_xfered)
1400 return MMC_BLK_RETRY;
1402 if (mmc_packed_cmd(mq_mrq->cmd_type)) {
1403 if (unlikely(brq->data.blocks << 9 != brq->data.bytes_xfered))
1404 return MMC_BLK_PARTIAL;
1406 return MMC_BLK_SUCCESS;
1409 if (blk_rq_bytes(req) != brq->data.bytes_xfered)
1410 return MMC_BLK_PARTIAL;
1412 return MMC_BLK_SUCCESS;
1415 static int mmc_blk_packed_err_check(struct mmc_card *card,
1416 struct mmc_async_req *areq)
1418 struct mmc_queue_req *mq_rq = container_of(areq, struct mmc_queue_req,
1420 struct request *req = mq_rq->req;
1421 struct mmc_packed *packed = mq_rq->packed;
1422 int err, check, status;
1428 check = mmc_blk_err_check(card, areq);
1429 err = get_card_status(card, &status, 0);
1431 pr_err("%s: error %d sending status command\n",
1432 req->rq_disk->disk_name, err);
1433 return MMC_BLK_ABORT;
1436 if (status & R1_EXCEPTION_EVENT) {
1437 err = mmc_get_ext_csd(card, &ext_csd);
1439 pr_err("%s: error %d sending ext_csd\n",
1440 req->rq_disk->disk_name, err);
1441 return MMC_BLK_ABORT;
1444 if ((ext_csd[EXT_CSD_EXP_EVENTS_STATUS] &
1445 EXT_CSD_PACKED_FAILURE) &&
1446 (ext_csd[EXT_CSD_PACKED_CMD_STATUS] &
1447 EXT_CSD_PACKED_GENERIC_ERROR)) {
1448 if (ext_csd[EXT_CSD_PACKED_CMD_STATUS] &
1449 EXT_CSD_PACKED_INDEXED_ERROR) {
1450 packed->idx_failure =
1451 ext_csd[EXT_CSD_PACKED_FAILURE_INDEX] - 1;
1452 check = MMC_BLK_PARTIAL;
1454 pr_err("%s: packed cmd failed, nr %u, sectors %u, "
1455 "failure index: %d\n",
1456 req->rq_disk->disk_name, packed->nr_entries,
1457 packed->blocks, packed->idx_failure);
1465 static void mmc_blk_rw_rq_prep(struct mmc_queue_req *mqrq,
1466 struct mmc_card *card,
1468 struct mmc_queue *mq)
1470 u32 readcmd, writecmd;
1471 struct mmc_blk_request *brq = &mqrq->brq;
1472 struct request *req = mqrq->req;
1473 struct mmc_blk_data *md = mq->data;
1477 * Reliable writes are used to implement Forced Unit Access and
1478 * are supported only on MMCs.
1480 bool do_rel_wr = (req->cmd_flags & REQ_FUA) &&
1481 (rq_data_dir(req) == WRITE) &&
1482 (md->flags & MMC_BLK_REL_WR);
1484 memset(brq, 0, sizeof(struct mmc_blk_request));
1485 brq->mrq.cmd = &brq->cmd;
1486 brq->mrq.data = &brq->data;
1488 brq->cmd.arg = blk_rq_pos(req);
1489 if (!mmc_card_blockaddr(card))
1491 brq->cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC;
1492 brq->data.blksz = 512;
1493 brq->stop.opcode = MMC_STOP_TRANSMISSION;
1495 brq->data.blocks = blk_rq_sectors(req);
1498 * The block layer doesn't support all sector count
1499 * restrictions, so we need to be prepared for too big
1502 if (brq->data.blocks > card->host->max_blk_count)
1503 brq->data.blocks = card->host->max_blk_count;
1505 if (brq->data.blocks > 1) {
1507 * After a read error, we redo the request one sector
1508 * at a time in order to accurately determine which
1509 * sectors can be read successfully.
1512 brq->data.blocks = 1;
1515 * Some controllers have HW issues while operating
1516 * in multiple I/O mode
1518 if (card->host->ops->multi_io_quirk)
1519 brq->data.blocks = card->host->ops->multi_io_quirk(card,
1520 (rq_data_dir(req) == READ) ?
1521 MMC_DATA_READ : MMC_DATA_WRITE,
1525 if (brq->data.blocks > 1 || do_rel_wr) {
1526 /* SPI multiblock writes terminate using a special
1527 * token, not a STOP_TRANSMISSION request.
1529 if (!mmc_host_is_spi(card->host) ||
1530 rq_data_dir(req) == READ)
1531 brq->mrq.stop = &brq->stop;
1532 readcmd = MMC_READ_MULTIPLE_BLOCK;
1533 writecmd = MMC_WRITE_MULTIPLE_BLOCK;
1535 brq->mrq.stop = NULL;
1536 readcmd = MMC_READ_SINGLE_BLOCK;
1537 writecmd = MMC_WRITE_BLOCK;
1539 if (rq_data_dir(req) == READ) {
1540 brq->cmd.opcode = readcmd;
1541 brq->data.flags |= MMC_DATA_READ;
1543 brq->stop.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 |
1546 brq->cmd.opcode = writecmd;
1547 brq->data.flags |= MMC_DATA_WRITE;
1549 brq->stop.flags = MMC_RSP_SPI_R1B | MMC_RSP_R1B |
1554 mmc_apply_rel_rw(brq, card, req);
1557 * Data tag is used only during writing meta data to speed
1558 * up write and any subsequent read of this meta data
1560 do_data_tag = (card->ext_csd.data_tag_unit_size) &&
1561 (req->cmd_flags & REQ_META) &&
1562 (rq_data_dir(req) == WRITE) &&
1563 ((brq->data.blocks * brq->data.blksz) >=
1564 card->ext_csd.data_tag_unit_size);
1567 * Pre-defined multi-block transfers are preferable to
1568 * open ended-ones (and necessary for reliable writes).
1569 * However, it is not sufficient to just send CMD23,
1570 * and avoid the final CMD12, as on an error condition
1571 * CMD12 (stop) needs to be sent anyway. This, coupled
1572 * with Auto-CMD23 enhancements provided by some
1573 * hosts, means that the complexity of dealing
1574 * with this is best left to the host. If CMD23 is
1575 * supported by card and host, we'll fill sbc in and let
1576 * the host deal with handling it correctly. This means
1577 * that for hosts that don't expose MMC_CAP_CMD23, no
1578 * change of behavior will be observed.
1580 * N.B: Some MMC cards experience perf degradation.
1581 * We'll avoid using CMD23-bounded multiblock writes for
1582 * these, while retaining features like reliable writes.
1584 if ((md->flags & MMC_BLK_CMD23) && mmc_op_multi(brq->cmd.opcode) &&
1585 (do_rel_wr || !(card->quirks & MMC_QUIRK_BLK_NO_CMD23) ||
1587 brq->sbc.opcode = MMC_SET_BLOCK_COUNT;
1588 brq->sbc.arg = brq->data.blocks |
1589 (do_rel_wr ? (1 << 31) : 0) |
1590 (do_data_tag ? (1 << 29) : 0);
1591 brq->sbc.flags = MMC_RSP_R1 | MMC_CMD_AC;
1592 brq->mrq.sbc = &brq->sbc;
1595 mmc_set_data_timeout(&brq->data, card);
1597 brq->data.sg = mqrq->sg;
1598 brq->data.sg_len = mmc_queue_map_sg(mq, mqrq);
1601 * Adjust the sg list so it is the same size as the
1604 if (brq->data.blocks != blk_rq_sectors(req)) {
1605 int i, data_size = brq->data.blocks << 9;
1606 struct scatterlist *sg;
1608 for_each_sg(brq->data.sg, sg, brq->data.sg_len, i) {
1609 data_size -= sg->length;
1610 if (data_size <= 0) {
1611 sg->length += data_size;
1616 brq->data.sg_len = i;
1619 mqrq->mmc_active.mrq = &brq->mrq;
1620 mqrq->mmc_active.err_check = mmc_blk_err_check;
1622 mmc_queue_bounce_pre(mqrq);
1625 static inline u8 mmc_calc_packed_hdr_segs(struct request_queue *q,
1626 struct mmc_card *card)
1628 unsigned int hdr_sz = mmc_large_sector(card) ? 4096 : 512;
1629 unsigned int max_seg_sz = queue_max_segment_size(q);
1630 unsigned int len, nr_segs = 0;
1633 len = min(hdr_sz, max_seg_sz);
1641 static u8 mmc_blk_prep_packed_list(struct mmc_queue *mq, struct request *req)
1643 struct request_queue *q = mq->queue;
1644 struct mmc_card *card = mq->card;
1645 struct request *cur = req, *next = NULL;
1646 struct mmc_blk_data *md = mq->data;
1647 struct mmc_queue_req *mqrq = mq->mqrq_cur;
1648 bool en_rel_wr = card->ext_csd.rel_param & EXT_CSD_WR_REL_PARAM_EN;
1649 unsigned int req_sectors = 0, phys_segments = 0;
1650 unsigned int max_blk_count, max_phys_segs;
1651 bool put_back = true;
1652 u8 max_packed_rw = 0;
1655 if (!(md->flags & MMC_BLK_PACKED_CMD))
1658 if ((rq_data_dir(cur) == WRITE) &&
1659 mmc_host_packed_wr(card->host))
1660 max_packed_rw = card->ext_csd.max_packed_writes;
1662 if (max_packed_rw == 0)
1665 if (mmc_req_rel_wr(cur) &&
1666 (md->flags & MMC_BLK_REL_WR) && !en_rel_wr)
1669 if (mmc_large_sector(card) &&
1670 !IS_ALIGNED(blk_rq_sectors(cur), 8))
1673 mmc_blk_clear_packed(mqrq);
1675 max_blk_count = min(card->host->max_blk_count,
1676 card->host->max_req_size >> 9);
1677 if (unlikely(max_blk_count > 0xffff))
1678 max_blk_count = 0xffff;
1680 max_phys_segs = queue_max_segments(q);
1681 req_sectors += blk_rq_sectors(cur);
1682 phys_segments += cur->nr_phys_segments;
1684 if (rq_data_dir(cur) == WRITE) {
1685 req_sectors += mmc_large_sector(card) ? 8 : 1;
1686 phys_segments += mmc_calc_packed_hdr_segs(q, card);
1690 if (reqs >= max_packed_rw - 1) {
1695 spin_lock_irq(q->queue_lock);
1696 next = blk_fetch_request(q);
1697 spin_unlock_irq(q->queue_lock);
1703 if (mmc_large_sector(card) &&
1704 !IS_ALIGNED(blk_rq_sectors(next), 8))
1707 if (next->cmd_flags & REQ_DISCARD ||
1708 next->cmd_flags & REQ_FLUSH)
1711 if (rq_data_dir(cur) != rq_data_dir(next))
1714 if (mmc_req_rel_wr(next) &&
1715 (md->flags & MMC_BLK_REL_WR) && !en_rel_wr)
1718 req_sectors += blk_rq_sectors(next);
1719 if (req_sectors > max_blk_count)
1722 phys_segments += next->nr_phys_segments;
1723 if (phys_segments > max_phys_segs)
1726 list_add_tail(&next->queuelist, &mqrq->packed->list);
1732 spin_lock_irq(q->queue_lock);
1733 blk_requeue_request(q, next);
1734 spin_unlock_irq(q->queue_lock);
1738 list_add(&req->queuelist, &mqrq->packed->list);
1739 mqrq->packed->nr_entries = ++reqs;
1740 mqrq->packed->retries = reqs;
1745 mqrq->cmd_type = MMC_PACKED_NONE;
1749 static void mmc_blk_packed_hdr_wrq_prep(struct mmc_queue_req *mqrq,
1750 struct mmc_card *card,
1751 struct mmc_queue *mq)
1753 struct mmc_blk_request *brq = &mqrq->brq;
1754 struct request *req = mqrq->req;
1755 struct request *prq;
1756 struct mmc_blk_data *md = mq->data;
1757 struct mmc_packed *packed = mqrq->packed;
1758 bool do_rel_wr, do_data_tag;
1759 u32 *packed_cmd_hdr;
1765 mqrq->cmd_type = MMC_PACKED_WRITE;
1767 packed->idx_failure = MMC_PACKED_NR_IDX;
1769 packed_cmd_hdr = packed->cmd_hdr;
1770 memset(packed_cmd_hdr, 0, sizeof(packed->cmd_hdr));
1771 packed_cmd_hdr[0] = (packed->nr_entries << 16) |
1772 (PACKED_CMD_WR << 8) | PACKED_CMD_VER;
1773 hdr_blocks = mmc_large_sector(card) ? 8 : 1;
1776 * Argument for each entry of packed group
1778 list_for_each_entry(prq, &packed->list, queuelist) {
1779 do_rel_wr = mmc_req_rel_wr(prq) && (md->flags & MMC_BLK_REL_WR);
1780 do_data_tag = (card->ext_csd.data_tag_unit_size) &&
1781 (prq->cmd_flags & REQ_META) &&
1782 (rq_data_dir(prq) == WRITE) &&
1783 ((brq->data.blocks * brq->data.blksz) >=
1784 card->ext_csd.data_tag_unit_size);
1785 /* Argument of CMD23 */
1786 packed_cmd_hdr[(i * 2)] =
1787 (do_rel_wr ? MMC_CMD23_ARG_REL_WR : 0) |
1788 (do_data_tag ? MMC_CMD23_ARG_TAG_REQ : 0) |
1789 blk_rq_sectors(prq);
1790 /* Argument of CMD18 or CMD25 */
1791 packed_cmd_hdr[((i * 2)) + 1] =
1792 mmc_card_blockaddr(card) ?
1793 blk_rq_pos(prq) : blk_rq_pos(prq) << 9;
1794 packed->blocks += blk_rq_sectors(prq);
1798 memset(brq, 0, sizeof(struct mmc_blk_request));
1799 brq->mrq.cmd = &brq->cmd;
1800 brq->mrq.data = &brq->data;
1801 brq->mrq.sbc = &brq->sbc;
1802 brq->mrq.stop = &brq->stop;
1804 brq->sbc.opcode = MMC_SET_BLOCK_COUNT;
1805 brq->sbc.arg = MMC_CMD23_ARG_PACKED | (packed->blocks + hdr_blocks);
1806 brq->sbc.flags = MMC_RSP_R1 | MMC_CMD_AC;
1808 brq->cmd.opcode = MMC_WRITE_MULTIPLE_BLOCK;
1809 brq->cmd.arg = blk_rq_pos(req);
1810 if (!mmc_card_blockaddr(card))
1812 brq->cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC;
1814 brq->data.blksz = 512;
1815 brq->data.blocks = packed->blocks + hdr_blocks;
1816 brq->data.flags |= MMC_DATA_WRITE;
1818 brq->stop.opcode = MMC_STOP_TRANSMISSION;
1820 brq->stop.flags = MMC_RSP_SPI_R1B | MMC_RSP_R1B | MMC_CMD_AC;
1822 mmc_set_data_timeout(&brq->data, card);
1824 brq->data.sg = mqrq->sg;
1825 brq->data.sg_len = mmc_queue_map_sg(mq, mqrq);
1827 mqrq->mmc_active.mrq = &brq->mrq;
1828 mqrq->mmc_active.err_check = mmc_blk_packed_err_check;
1830 mmc_queue_bounce_pre(mqrq);
1833 static int mmc_blk_cmd_err(struct mmc_blk_data *md, struct mmc_card *card,
1834 struct mmc_blk_request *brq, struct request *req,
1837 struct mmc_queue_req *mq_rq;
1838 mq_rq = container_of(brq, struct mmc_queue_req, brq);
1841 * If this is an SD card and we're writing, we can first
1842 * mark the known good sectors as ok.
1844 * If the card is not SD, we can still ok written sectors
1845 * as reported by the controller (which might be less than
1846 * the real number of written sectors, but never more).
1848 if (mmc_card_sd(card)) {
1851 blocks = mmc_sd_num_wr_blocks(card);
1852 if (blocks != (u32)-1) {
1853 ret = blk_end_request(req, 0, blocks << 9);
1856 if (!mmc_packed_cmd(mq_rq->cmd_type))
1857 ret = blk_end_request(req, 0, brq->data.bytes_xfered);
1862 static int mmc_blk_end_packed_req(struct mmc_queue_req *mq_rq)
1864 struct request *prq;
1865 struct mmc_packed *packed = mq_rq->packed;
1866 int idx = packed->idx_failure, i = 0;
1871 while (!list_empty(&packed->list)) {
1872 prq = list_entry_rq(packed->list.next);
1874 /* retry from error index */
1875 packed->nr_entries -= idx;
1879 if (packed->nr_entries == MMC_PACKED_NR_SINGLE) {
1880 list_del_init(&prq->queuelist);
1881 mmc_blk_clear_packed(mq_rq);
1885 list_del_init(&prq->queuelist);
1886 blk_end_request(prq, 0, blk_rq_bytes(prq));
1890 mmc_blk_clear_packed(mq_rq);
1894 static void mmc_blk_abort_packed_req(struct mmc_queue_req *mq_rq)
1896 struct request *prq;
1897 struct mmc_packed *packed = mq_rq->packed;
1901 while (!list_empty(&packed->list)) {
1902 prq = list_entry_rq(packed->list.next);
1903 list_del_init(&prq->queuelist);
1904 blk_end_request(prq, -EIO, blk_rq_bytes(prq));
1907 mmc_blk_clear_packed(mq_rq);
1910 static void mmc_blk_revert_packed_req(struct mmc_queue *mq,
1911 struct mmc_queue_req *mq_rq)
1913 struct request *prq;
1914 struct request_queue *q = mq->queue;
1915 struct mmc_packed *packed = mq_rq->packed;
1919 while (!list_empty(&packed->list)) {
1920 prq = list_entry_rq(packed->list.prev);
1921 if (prq->queuelist.prev != &packed->list) {
1922 list_del_init(&prq->queuelist);
1923 spin_lock_irq(q->queue_lock);
1924 blk_requeue_request(mq->queue, prq);
1925 spin_unlock_irq(q->queue_lock);
1927 list_del_init(&prq->queuelist);
1931 mmc_blk_clear_packed(mq_rq);
1934 static int mmc_blk_issue_rw_rq(struct mmc_queue *mq, struct request *rqc)
1936 struct mmc_blk_data *md = mq->data;
1937 struct mmc_card *card = md->queue.card;
1938 struct mmc_blk_request *brq = &mq->mqrq_cur->brq;
1939 int ret = 1, disable_multi = 0, retry = 0, type, retune_retry_done = 0;
1940 enum mmc_blk_status status;
1941 struct mmc_queue_req *mq_rq;
1942 struct request *req = rqc;
1943 struct mmc_async_req *areq;
1944 const u8 packed_nr = 2;
1947 if (!rqc && !mq->mqrq_prev->req)
1951 reqs = mmc_blk_prep_packed_list(mq, rqc);
1956 * When 4KB native sector is enabled, only 8 blocks
1957 * multiple read or write is allowed
1959 if ((brq->data.blocks & 0x07) &&
1960 (card->ext_csd.data_sector_size == 4096)) {
1961 pr_err("%s: Transfer size is not 4KB sector size aligned\n",
1962 req->rq_disk->disk_name);
1963 mq_rq = mq->mqrq_cur;
1967 if (reqs >= packed_nr)
1968 mmc_blk_packed_hdr_wrq_prep(mq->mqrq_cur,
1971 mmc_blk_rw_rq_prep(mq->mqrq_cur, card, 0, mq);
1972 areq = &mq->mqrq_cur->mmc_active;
1975 areq = mmc_start_req(card->host, areq, (int *) &status);
1977 if (status == MMC_BLK_NEW_REQUEST)
1978 mq->flags |= MMC_QUEUE_NEW_REQUEST;
1982 mq_rq = container_of(areq, struct mmc_queue_req, mmc_active);
1985 type = rq_data_dir(req) == READ ? MMC_BLK_READ : MMC_BLK_WRITE;
1986 mmc_queue_bounce_post(mq_rq);
1989 case MMC_BLK_SUCCESS:
1990 case MMC_BLK_PARTIAL:
1992 * A block was successfully transferred.
1994 mmc_blk_reset_success(md, type);
1996 if (mmc_packed_cmd(mq_rq->cmd_type)) {
1997 ret = mmc_blk_end_packed_req(mq_rq);
2000 ret = blk_end_request(req, 0,
2001 brq->data.bytes_xfered);
2005 * If the blk_end_request function returns non-zero even
2006 * though all data has been transferred and no errors
2007 * were returned by the host controller, it's a bug.
2009 if (status == MMC_BLK_SUCCESS && ret) {
2010 pr_err("%s BUG rq_tot %d d_xfer %d\n",
2011 __func__, blk_rq_bytes(req),
2012 brq->data.bytes_xfered);
2017 case MMC_BLK_CMD_ERR:
2018 ret = mmc_blk_cmd_err(md, card, brq, req, ret);
2019 if (mmc_blk_reset(md, card->host, type))
2025 retune_retry_done = brq->retune_retry_done;
2030 if (!mmc_blk_reset(md, card->host, type))
2033 case MMC_BLK_DATA_ERR: {
2036 err = mmc_blk_reset(md, card->host, type);
2039 if (err == -ENODEV ||
2040 mmc_packed_cmd(mq_rq->cmd_type))
2044 case MMC_BLK_ECC_ERR:
2045 if (brq->data.blocks > 1) {
2046 /* Redo read one sector at a time */
2047 pr_warn("%s: retrying using single block read\n",
2048 req->rq_disk->disk_name);
2053 * After an error, we redo I/O one sector at a
2054 * time, so we only reach here after trying to
2055 * read a single sector.
2057 ret = blk_end_request(req, -EIO,
2062 case MMC_BLK_NOMEDIUM:
2065 pr_err("%s: Unhandled return value (%d)",
2066 req->rq_disk->disk_name, status);
2071 if (mmc_packed_cmd(mq_rq->cmd_type)) {
2072 if (!mq_rq->packed->retries)
2074 mmc_blk_packed_hdr_wrq_prep(mq_rq, card, mq);
2075 mmc_start_req(card->host,
2076 &mq_rq->mmc_active, NULL);
2080 * In case of a incomplete request
2081 * prepare it again and resend.
2083 mmc_blk_rw_rq_prep(mq_rq, card,
2085 mmc_start_req(card->host,
2086 &mq_rq->mmc_active, NULL);
2088 mq_rq->brq.retune_retry_done = retune_retry_done;
2095 if (mmc_packed_cmd(mq_rq->cmd_type)) {
2096 mmc_blk_abort_packed_req(mq_rq);
2098 if (mmc_card_removed(card))
2099 req->cmd_flags |= REQ_QUIET;
2101 ret = blk_end_request(req, -EIO,
2102 blk_rq_cur_bytes(req));
2107 if (mmc_card_removed(card)) {
2108 rqc->cmd_flags |= REQ_QUIET;
2109 blk_end_request_all(rqc, -EIO);
2112 * If current request is packed, it needs to put back.
2114 if (mmc_packed_cmd(mq->mqrq_cur->cmd_type))
2115 mmc_blk_revert_packed_req(mq, mq->mqrq_cur);
2117 mmc_blk_rw_rq_prep(mq->mqrq_cur, card, 0, mq);
2118 mmc_start_req(card->host,
2119 &mq->mqrq_cur->mmc_active, NULL);
2126 static int mmc_blk_issue_rq(struct mmc_queue *mq, struct request *req)
2129 struct mmc_blk_data *md = mq->data;
2130 struct mmc_card *card = md->queue.card;
2131 struct mmc_host *host = card->host;
2132 unsigned long flags;
2133 unsigned int cmd_flags = req ? req->cmd_flags : 0;
2135 if (req && !mq->mqrq_prev->req)
2136 /* claim host only for the first request */
2139 ret = mmc_blk_part_switch(card, md);
2142 blk_end_request_all(req, -EIO);
2148 mq->flags &= ~MMC_QUEUE_NEW_REQUEST;
2149 if (cmd_flags & REQ_DISCARD) {
2150 /* complete ongoing async transfer before issuing discard */
2151 if (card->host->areq)
2152 mmc_blk_issue_rw_rq(mq, NULL);
2153 if (req->cmd_flags & REQ_SECURE)
2154 ret = mmc_blk_issue_secdiscard_rq(mq, req);
2156 ret = mmc_blk_issue_discard_rq(mq, req);
2157 } else if (cmd_flags & REQ_FLUSH) {
2158 /* complete ongoing async transfer before issuing flush */
2159 if (card->host->areq)
2160 mmc_blk_issue_rw_rq(mq, NULL);
2161 ret = mmc_blk_issue_flush(mq, req);
2163 if (!req && host->areq) {
2164 spin_lock_irqsave(&host->context_info.lock, flags);
2165 host->context_info.is_waiting_last_req = true;
2166 spin_unlock_irqrestore(&host->context_info.lock, flags);
2168 ret = mmc_blk_issue_rw_rq(mq, req);
2172 if ((!req && !(mq->flags & MMC_QUEUE_NEW_REQUEST)) ||
2173 (cmd_flags & MMC_REQ_SPECIAL_MASK))
2175 * Release host when there are no more requests
2176 * and after special request(discard, flush) is done.
2177 * In case sepecial request, there is no reentry to
2178 * the 'mmc_blk_issue_rq' with 'mqrq_prev->req'.
2184 static inline int mmc_blk_readonly(struct mmc_card *card)
2186 return mmc_card_readonly(card) ||
2187 !(card->csd.cmdclass & CCC_BLOCK_WRITE);
2190 static struct mmc_blk_data *mmc_blk_alloc_req(struct mmc_card *card,
2191 struct device *parent,
2194 const char *subname,
2197 struct mmc_blk_data *md;
2200 devidx = find_first_zero_bit(dev_use, max_devices);
2201 if (devidx >= max_devices)
2202 return ERR_PTR(-ENOSPC);
2203 __set_bit(devidx, dev_use);
2205 md = kzalloc(sizeof(struct mmc_blk_data), GFP_KERNEL);
2212 * !subname implies we are creating main mmc_blk_data that will be
2213 * associated with mmc_card with dev_set_drvdata. Due to device
2214 * partitions, devidx will not coincide with a per-physical card
2215 * index anymore so we keep track of a name index.
2218 md->name_idx = find_first_zero_bit(name_use, max_devices);
2219 __set_bit(md->name_idx, name_use);
2221 md->name_idx = ((struct mmc_blk_data *)
2222 dev_to_disk(parent)->private_data)->name_idx;
2224 md->area_type = area_type;
2227 * Set the read-only status based on the supported commands
2228 * and the write protect switch.
2230 md->read_only = mmc_blk_readonly(card);
2232 md->disk = alloc_disk(perdev_minors);
2233 if (md->disk == NULL) {
2238 spin_lock_init(&md->lock);
2239 INIT_LIST_HEAD(&md->part);
2242 ret = mmc_init_queue(&md->queue, card, &md->lock, subname);
2246 md->queue.issue_fn = mmc_blk_issue_rq;
2247 md->queue.data = md;
2249 md->disk->major = MMC_BLOCK_MAJOR;
2250 md->disk->first_minor = devidx * perdev_minors;
2251 md->disk->fops = &mmc_bdops;
2252 md->disk->private_data = md;
2253 md->disk->queue = md->queue.queue;
2254 md->disk->driverfs_dev = parent;
2255 set_disk_ro(md->disk, md->read_only || default_ro);
2256 md->disk->flags = GENHD_FL_EXT_DEVT;
2257 if (area_type & (MMC_BLK_DATA_AREA_RPMB | MMC_BLK_DATA_AREA_BOOT))
2258 md->disk->flags |= GENHD_FL_NO_PART_SCAN;
2261 * As discussed on lkml, GENHD_FL_REMOVABLE should:
2263 * - be set for removable media with permanent block devices
2264 * - be unset for removable block devices with permanent media
2266 * Since MMC block devices clearly fall under the second
2267 * case, we do not set GENHD_FL_REMOVABLE. Userspace
2268 * should use the block device creation/destruction hotplug
2269 * messages to tell when the card is present.
2272 snprintf(md->disk->disk_name, sizeof(md->disk->disk_name),
2273 "mmcblk%u%s", md->name_idx, subname ? subname : "");
2275 if (mmc_card_mmc(card))
2276 blk_queue_logical_block_size(md->queue.queue,
2277 card->ext_csd.data_sector_size);
2279 blk_queue_logical_block_size(md->queue.queue, 512);
2281 set_capacity(md->disk, size);
2283 if (mmc_host_cmd23(card->host)) {
2284 if (mmc_card_mmc(card) ||
2285 (mmc_card_sd(card) &&
2286 card->scr.cmds & SD_SCR_CMD23_SUPPORT))
2287 md->flags |= MMC_BLK_CMD23;
2290 if (mmc_card_mmc(card) &&
2291 md->flags & MMC_BLK_CMD23 &&
2292 ((card->ext_csd.rel_param & EXT_CSD_WR_REL_PARAM_EN) ||
2293 card->ext_csd.rel_sectors)) {
2294 md->flags |= MMC_BLK_REL_WR;
2295 blk_queue_flush(md->queue.queue, REQ_FLUSH | REQ_FUA);
2298 if (mmc_card_mmc(card) &&
2299 (area_type == MMC_BLK_DATA_AREA_MAIN) &&
2300 (md->flags & MMC_BLK_CMD23) &&
2301 card->ext_csd.packed_event_en) {
2302 if (!mmc_packed_init(&md->queue, card))
2303 md->flags |= MMC_BLK_PACKED_CMD;
2313 return ERR_PTR(ret);
2316 static struct mmc_blk_data *mmc_blk_alloc(struct mmc_card *card)
2320 if (!mmc_card_sd(card) && mmc_card_blockaddr(card)) {
2322 * The EXT_CSD sector count is in number or 512 byte
2325 size = card->ext_csd.sectors;
2328 * The CSD capacity field is in units of read_blkbits.
2329 * set_capacity takes units of 512 bytes.
2331 size = (typeof(sector_t))card->csd.capacity
2332 << (card->csd.read_blkbits - 9);
2335 return mmc_blk_alloc_req(card, &card->dev, size, false, NULL,
2336 MMC_BLK_DATA_AREA_MAIN);
2339 static int mmc_blk_alloc_part(struct mmc_card *card,
2340 struct mmc_blk_data *md,
2341 unsigned int part_type,
2344 const char *subname,
2348 struct mmc_blk_data *part_md;
2350 part_md = mmc_blk_alloc_req(card, disk_to_dev(md->disk), size, default_ro,
2351 subname, area_type);
2352 if (IS_ERR(part_md))
2353 return PTR_ERR(part_md);
2354 part_md->part_type = part_type;
2355 list_add(&part_md->part, &md->part);
2357 string_get_size((u64)get_capacity(part_md->disk), 512, STRING_UNITS_2,
2358 cap_str, sizeof(cap_str));
2359 pr_info("%s: %s %s partition %u %s\n",
2360 part_md->disk->disk_name, mmc_card_id(card),
2361 mmc_card_name(card), part_md->part_type, cap_str);
2365 /* MMC Physical partitions consist of two boot partitions and
2366 * up to four general purpose partitions.
2367 * For each partition enabled in EXT_CSD a block device will be allocatedi
2368 * to provide access to the partition.
2371 static int mmc_blk_alloc_parts(struct mmc_card *card, struct mmc_blk_data *md)
2375 if (!mmc_card_mmc(card))
2378 for (idx = 0; idx < card->nr_parts; idx++) {
2379 if (card->part[idx].size) {
2380 ret = mmc_blk_alloc_part(card, md,
2381 card->part[idx].part_cfg,
2382 card->part[idx].size >> 9,
2383 card->part[idx].force_ro,
2384 card->part[idx].name,
2385 card->part[idx].area_type);
2394 static void mmc_blk_remove_req(struct mmc_blk_data *md)
2396 struct mmc_card *card;
2400 * Flush remaining requests and free queues. It
2401 * is freeing the queue that stops new requests
2402 * from being accepted.
2404 card = md->queue.card;
2405 mmc_cleanup_queue(&md->queue);
2406 if (md->flags & MMC_BLK_PACKED_CMD)
2407 mmc_packed_clean(&md->queue);
2408 if (md->disk->flags & GENHD_FL_UP) {
2409 device_remove_file(disk_to_dev(md->disk), &md->force_ro);
2410 if ((md->area_type & MMC_BLK_DATA_AREA_BOOT) &&
2411 card->ext_csd.boot_ro_lockable)
2412 device_remove_file(disk_to_dev(md->disk),
2413 &md->power_ro_lock);
2415 del_gendisk(md->disk);
2421 static void mmc_blk_remove_parts(struct mmc_card *card,
2422 struct mmc_blk_data *md)
2424 struct list_head *pos, *q;
2425 struct mmc_blk_data *part_md;
2427 __clear_bit(md->name_idx, name_use);
2428 list_for_each_safe(pos, q, &md->part) {
2429 part_md = list_entry(pos, struct mmc_blk_data, part);
2431 mmc_blk_remove_req(part_md);
2435 static int mmc_add_disk(struct mmc_blk_data *md)
2438 struct mmc_card *card = md->queue.card;
2441 md->force_ro.show = force_ro_show;
2442 md->force_ro.store = force_ro_store;
2443 sysfs_attr_init(&md->force_ro.attr);
2444 md->force_ro.attr.name = "force_ro";
2445 md->force_ro.attr.mode = S_IRUGO | S_IWUSR;
2446 ret = device_create_file(disk_to_dev(md->disk), &md->force_ro);
2450 if ((md->area_type & MMC_BLK_DATA_AREA_BOOT) &&
2451 card->ext_csd.boot_ro_lockable) {
2454 if (card->ext_csd.boot_ro_lock & EXT_CSD_BOOT_WP_B_PWR_WP_DIS)
2457 mode = S_IRUGO | S_IWUSR;
2459 md->power_ro_lock.show = power_ro_lock_show;
2460 md->power_ro_lock.store = power_ro_lock_store;
2461 sysfs_attr_init(&md->power_ro_lock.attr);
2462 md->power_ro_lock.attr.mode = mode;
2463 md->power_ro_lock.attr.name =
2464 "ro_lock_until_next_power_on";
2465 ret = device_create_file(disk_to_dev(md->disk),
2466 &md->power_ro_lock);
2468 goto power_ro_lock_fail;
2473 device_remove_file(disk_to_dev(md->disk), &md->force_ro);
2475 del_gendisk(md->disk);
2480 #define CID_MANFID_SANDISK 0x2
2481 #define CID_MANFID_TOSHIBA 0x11
2482 #define CID_MANFID_MICRON 0x13
2483 #define CID_MANFID_SAMSUNG 0x15
2484 #define CID_MANFID_KINGSTON 0x70
2486 static const struct mmc_fixup blk_fixups[] =
2488 MMC_FIXUP("SEM02G", CID_MANFID_SANDISK, 0x100, add_quirk,
2489 MMC_QUIRK_INAND_CMD38),
2490 MMC_FIXUP("SEM04G", CID_MANFID_SANDISK, 0x100, add_quirk,
2491 MMC_QUIRK_INAND_CMD38),
2492 MMC_FIXUP("SEM08G", CID_MANFID_SANDISK, 0x100, add_quirk,
2493 MMC_QUIRK_INAND_CMD38),
2494 MMC_FIXUP("SEM16G", CID_MANFID_SANDISK, 0x100, add_quirk,
2495 MMC_QUIRK_INAND_CMD38),
2496 MMC_FIXUP("SEM32G", CID_MANFID_SANDISK, 0x100, add_quirk,
2497 MMC_QUIRK_INAND_CMD38),
2500 * Some MMC cards experience performance degradation with CMD23
2501 * instead of CMD12-bounded multiblock transfers. For now we'll
2502 * black list what's bad...
2503 * - Certain Toshiba cards.
2505 * N.B. This doesn't affect SD cards.
2507 MMC_FIXUP("SDMB-32", CID_MANFID_SANDISK, CID_OEMID_ANY, add_quirk_mmc,
2508 MMC_QUIRK_BLK_NO_CMD23),
2509 MMC_FIXUP("SDM032", CID_MANFID_SANDISK, CID_OEMID_ANY, add_quirk_mmc,
2510 MMC_QUIRK_BLK_NO_CMD23),
2511 MMC_FIXUP("MMC08G", CID_MANFID_TOSHIBA, CID_OEMID_ANY, add_quirk_mmc,
2512 MMC_QUIRK_BLK_NO_CMD23),
2513 MMC_FIXUP("MMC16G", CID_MANFID_TOSHIBA, CID_OEMID_ANY, add_quirk_mmc,
2514 MMC_QUIRK_BLK_NO_CMD23),
2515 MMC_FIXUP("MMC32G", CID_MANFID_TOSHIBA, CID_OEMID_ANY, add_quirk_mmc,
2516 MMC_QUIRK_BLK_NO_CMD23),
2519 * Some Micron MMC cards needs longer data read timeout than
2522 MMC_FIXUP(CID_NAME_ANY, CID_MANFID_MICRON, 0x200, add_quirk_mmc,
2523 MMC_QUIRK_LONG_READ_TIME),
2526 * On these Samsung MoviNAND parts, performing secure erase or
2527 * secure trim can result in unrecoverable corruption due to a
2530 MMC_FIXUP("M8G2FA", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2531 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2532 MMC_FIXUP("MAG4FA", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2533 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2534 MMC_FIXUP("MBG8FA", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2535 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2536 MMC_FIXUP("MCGAFA", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2537 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2538 MMC_FIXUP("VAL00M", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2539 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2540 MMC_FIXUP("VYL00M", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2541 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2542 MMC_FIXUP("KYL00M", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2543 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2544 MMC_FIXUP("VZL00M", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2545 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2548 * On Some Kingston eMMCs, performing trim can result in
2549 * unrecoverable data conrruption occasionally due to a firmware bug.
2551 MMC_FIXUP("V10008", CID_MANFID_KINGSTON, CID_OEMID_ANY, add_quirk_mmc,
2552 MMC_QUIRK_TRIM_BROKEN),
2553 MMC_FIXUP("V10016", CID_MANFID_KINGSTON, CID_OEMID_ANY, add_quirk_mmc,
2554 MMC_QUIRK_TRIM_BROKEN),
2559 extern struct mmc_card *this_card;
2560 static int mmc_blk_probe(struct mmc_card *card)
2562 struct mmc_blk_data *md, *part_md;
2566 * Check that the card supports the command class(es) we need.
2568 if (!(card->csd.cmdclass & CCC_BLOCK_READ))
2571 mmc_fixup_device(card, blk_fixups);
2573 md = mmc_blk_alloc(card);
2577 string_get_size((u64)get_capacity(md->disk), 512, STRING_UNITS_2,
2578 cap_str, sizeof(cap_str));
2579 pr_info("%s: %s %s %s %s\n",
2580 md->disk->disk_name, mmc_card_id(card), mmc_card_name(card),
2581 cap_str, md->read_only ? "(ro)" : "");
2583 if (mmc_blk_alloc_parts(card, md))
2586 dev_set_drvdata(&card->dev, md);
2588 #if defined(CONFIG_MMC_DW_ROCKCHIP)
2589 if (card->host->restrict_caps & RESTRICT_CARD_TYPE_EMMC) {
2591 md->disk->emmc_disk = 1;
2593 md->disk->emmc_disk = 0;
2597 if (mmc_add_disk(md))
2600 list_for_each_entry(part_md, &md->part, part) {
2601 if (mmc_add_disk(part_md))
2605 pm_runtime_set_autosuspend_delay(&card->dev, 3000);
2606 pm_runtime_use_autosuspend(&card->dev);
2609 * Don't enable runtime PM for SD-combo cards here. Leave that
2610 * decision to be taken during the SDIO init sequence instead.
2612 if (card->type != MMC_TYPE_SD_COMBO) {
2613 pm_runtime_set_active(&card->dev);
2614 pm_runtime_enable(&card->dev);
2620 mmc_blk_remove_parts(card, md);
2621 mmc_blk_remove_req(md);
2625 static void mmc_blk_remove(struct mmc_card *card)
2627 struct mmc_blk_data *md = dev_get_drvdata(&card->dev);
2629 #if defined(CONFIG_MMC_DW_ROCKCHIP)
2630 if (card->host->restrict_caps & RESTRICT_CARD_TYPE_EMMC)
2634 mmc_blk_remove_parts(card, md);
2635 pm_runtime_get_sync(&card->dev);
2636 mmc_claim_host(card->host);
2637 mmc_blk_part_switch(card, md);
2638 mmc_release_host(card->host);
2639 if (card->type != MMC_TYPE_SD_COMBO)
2640 pm_runtime_disable(&card->dev);
2641 pm_runtime_put_noidle(&card->dev);
2642 mmc_blk_remove_req(md);
2643 dev_set_drvdata(&card->dev, NULL);
2646 static int _mmc_blk_suspend(struct mmc_card *card)
2648 struct mmc_blk_data *part_md;
2649 struct mmc_blk_data *md = dev_get_drvdata(&card->dev);
2652 mmc_queue_suspend(&md->queue);
2653 list_for_each_entry(part_md, &md->part, part) {
2654 mmc_queue_suspend(&part_md->queue);
2660 static void mmc_blk_shutdown(struct mmc_card *card)
2662 _mmc_blk_suspend(card);
2665 #ifdef CONFIG_PM_SLEEP
2666 static int mmc_blk_suspend(struct device *dev)
2668 struct mmc_card *card = mmc_dev_to_card(dev);
2670 return _mmc_blk_suspend(card);
2673 static int mmc_blk_resume(struct device *dev)
2675 struct mmc_blk_data *part_md;
2676 struct mmc_blk_data *md = dev_get_drvdata(dev);
2680 * Resume involves the card going into idle state,
2681 * so current partition is always the main one.
2683 md->part_curr = md->part_type;
2684 mmc_queue_resume(&md->queue);
2685 list_for_each_entry(part_md, &md->part, part) {
2686 mmc_queue_resume(&part_md->queue);
2693 static SIMPLE_DEV_PM_OPS(mmc_blk_pm_ops, mmc_blk_suspend, mmc_blk_resume);
2695 static struct mmc_driver mmc_driver = {
2698 .pm = &mmc_blk_pm_ops,
2700 .probe = mmc_blk_probe,
2701 .remove = mmc_blk_remove,
2702 .shutdown = mmc_blk_shutdown,
2705 static int __init mmc_blk_init(void)
2709 if (perdev_minors != CONFIG_MMC_BLOCK_MINORS)
2710 pr_info("mmcblk: using %d minors per device\n", perdev_minors);
2712 max_devices = min(MAX_DEVICES, (1 << MINORBITS) / perdev_minors);
2714 res = register_blkdev(MMC_BLOCK_MAJOR, "mmc");
2718 res = mmc_register_driver(&mmc_driver);
2724 unregister_blkdev(MMC_BLOCK_MAJOR, "mmc");
2729 static void __exit mmc_blk_exit(void)
2731 mmc_unregister_driver(&mmc_driver);
2732 unregister_blkdev(MMC_BLOCK_MAJOR, "mmc");
2735 module_init(mmc_blk_init);
2736 module_exit(mmc_blk_exit);
2738 MODULE_LICENSE("GPL");
2739 MODULE_DESCRIPTION("Multimedia Card (MMC) block device driver");