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 #define CREATE_TRACE_POINTS
40 #include <trace/events/mmc.h>
42 #include <linux/mmc/ioctl.h>
43 #include <linux/mmc/card.h>
44 #include <linux/mmc/host.h>
45 #include <linux/mmc/mmc.h>
46 #include <linux/mmc/sd.h>
48 #include <asm/uaccess.h>
52 MODULE_ALIAS("mmc:block");
53 #ifdef MODULE_PARAM_PREFIX
54 #undef MODULE_PARAM_PREFIX
56 #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 (rq_data_dir(req) == WRITE))
70 #define PACKED_CMD_VER 0x01
71 #define PACKED_CMD_WR 0x02
73 static DEFINE_MUTEX(block_mutex);
76 * The defaults come from config options but can be overriden by module
79 static int perdev_minors = CONFIG_MMC_BLOCK_MINORS;
82 * We've only got one major, so number of mmcblk devices is
83 * limited to (1 << 20) / number of minors per device. It is also
84 * currently limited by the size of the static bitmaps below.
86 static int max_devices;
88 #define MAX_DEVICES 256
90 /* TODO: Replace these with struct ida */
91 static DECLARE_BITMAP(dev_use, MAX_DEVICES);
92 static DECLARE_BITMAP(name_use, MAX_DEVICES);
95 * There is one mmc_blk_data per slot.
100 struct mmc_queue queue;
101 struct list_head part;
104 #define MMC_BLK_CMD23 (1 << 0) /* Can do SET_BLOCK_COUNT for multiblock */
105 #define MMC_BLK_REL_WR (1 << 1) /* MMC Reliable write support */
106 #define MMC_BLK_PACKED_CMD (1 << 2) /* MMC packed command support */
109 unsigned int read_only;
110 unsigned int part_type;
111 unsigned int name_idx;
112 unsigned int reset_done;
113 #define MMC_BLK_READ BIT(0)
114 #define MMC_BLK_WRITE BIT(1)
115 #define MMC_BLK_DISCARD BIT(2)
116 #define MMC_BLK_SECDISCARD BIT(3)
119 * Only set in main mmc_blk_data associated
120 * with mmc_card with dev_set_drvdata, and keeps
121 * track of the current selected device partition.
123 unsigned int part_curr;
124 struct device_attribute force_ro;
125 struct device_attribute power_ro_lock;
129 static DEFINE_MUTEX(open_lock);
132 MMC_PACKED_NR_IDX = -1,
134 MMC_PACKED_NR_SINGLE,
137 module_param(perdev_minors, int, 0444);
138 MODULE_PARM_DESC(perdev_minors, "Minors numbers to allocate per device");
140 static inline int mmc_blk_part_switch(struct mmc_card *card,
141 struct mmc_blk_data *md);
142 static int get_card_status(struct mmc_card *card, u32 *status, int retries);
144 static inline void mmc_blk_clear_packed(struct mmc_queue_req *mqrq)
146 struct mmc_packed *packed = mqrq->packed;
150 mqrq->cmd_type = MMC_PACKED_NONE;
151 packed->nr_entries = MMC_PACKED_NR_ZERO;
152 packed->idx_failure = MMC_PACKED_NR_IDX;
157 static struct mmc_blk_data *mmc_blk_get(struct gendisk *disk)
159 struct mmc_blk_data *md;
161 mutex_lock(&open_lock);
162 md = disk->private_data;
163 if (md && md->usage == 0)
167 mutex_unlock(&open_lock);
172 static inline int mmc_get_devidx(struct gendisk *disk)
174 int devidx = disk->first_minor / perdev_minors;
178 static void mmc_blk_put(struct mmc_blk_data *md)
180 mutex_lock(&open_lock);
182 if (md->usage == 0) {
183 int devidx = mmc_get_devidx(md->disk);
184 blk_cleanup_queue(md->queue.queue);
186 __clear_bit(devidx, dev_use);
191 mutex_unlock(&open_lock);
194 static ssize_t power_ro_lock_show(struct device *dev,
195 struct device_attribute *attr, char *buf)
198 struct mmc_blk_data *md = mmc_blk_get(dev_to_disk(dev));
199 struct mmc_card *card = md->queue.card;
202 if (card->ext_csd.boot_ro_lock & EXT_CSD_BOOT_WP_B_PERM_WP_EN)
204 else if (card->ext_csd.boot_ro_lock & EXT_CSD_BOOT_WP_B_PWR_WP_EN)
207 ret = snprintf(buf, PAGE_SIZE, "%d\n", locked);
214 static ssize_t power_ro_lock_store(struct device *dev,
215 struct device_attribute *attr, const char *buf, size_t count)
218 struct mmc_blk_data *md, *part_md;
219 struct mmc_card *card;
222 if (kstrtoul(buf, 0, &set))
228 md = mmc_blk_get(dev_to_disk(dev));
229 card = md->queue.card;
233 ret = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_BOOT_WP,
234 card->ext_csd.boot_ro_lock |
235 EXT_CSD_BOOT_WP_B_PWR_WP_EN,
236 card->ext_csd.part_time);
238 pr_err("%s: Locking boot partition ro until next power on failed: %d\n", md->disk->disk_name, ret);
240 card->ext_csd.boot_ro_lock |= EXT_CSD_BOOT_WP_B_PWR_WP_EN;
245 pr_info("%s: Locking boot partition ro until next power on\n",
246 md->disk->disk_name);
247 set_disk_ro(md->disk, 1);
249 list_for_each_entry(part_md, &md->part, part)
250 if (part_md->area_type == MMC_BLK_DATA_AREA_BOOT) {
251 pr_info("%s: Locking boot partition ro until next power on\n", part_md->disk->disk_name);
252 set_disk_ro(part_md->disk, 1);
260 static ssize_t force_ro_show(struct device *dev, struct device_attribute *attr,
264 struct mmc_blk_data *md = mmc_blk_get(dev_to_disk(dev));
266 ret = snprintf(buf, PAGE_SIZE, "%d\n",
267 get_disk_ro(dev_to_disk(dev)) ^
273 static ssize_t force_ro_store(struct device *dev, struct device_attribute *attr,
274 const char *buf, size_t count)
278 struct mmc_blk_data *md = mmc_blk_get(dev_to_disk(dev));
279 unsigned long set = simple_strtoul(buf, &end, 0);
285 set_disk_ro(dev_to_disk(dev), set || md->read_only);
292 static int mmc_blk_open(struct block_device *bdev, fmode_t mode)
294 struct mmc_blk_data *md = mmc_blk_get(bdev->bd_disk);
297 mutex_lock(&block_mutex);
300 check_disk_change(bdev);
303 if ((mode & FMODE_WRITE) && md->read_only) {
308 mutex_unlock(&block_mutex);
313 static void mmc_blk_release(struct gendisk *disk, fmode_t mode)
315 struct mmc_blk_data *md = disk->private_data;
317 mutex_lock(&block_mutex);
319 mutex_unlock(&block_mutex);
323 mmc_blk_getgeo(struct block_device *bdev, struct hd_geometry *geo)
325 geo->cylinders = get_capacity(bdev->bd_disk) / (4 * 16);
331 struct mmc_blk_ioc_data {
332 struct mmc_ioc_cmd ic;
337 static struct mmc_blk_ioc_data *mmc_blk_ioctl_copy_from_user(
338 struct mmc_ioc_cmd __user *user)
340 struct mmc_blk_ioc_data *idata;
343 idata = kzalloc(sizeof(*idata), GFP_KERNEL);
349 if (copy_from_user(&idata->ic, user, sizeof(idata->ic))) {
354 idata->buf_bytes = (u64) idata->ic.blksz * idata->ic.blocks;
355 if (idata->buf_bytes > MMC_IOC_MAX_BYTES) {
360 if (!idata->buf_bytes)
363 idata->buf = kzalloc(idata->buf_bytes, GFP_KERNEL);
369 if (copy_from_user(idata->buf, (void __user *)(unsigned long)
370 idata->ic.data_ptr, idata->buf_bytes)) {
385 static int mmc_blk_ioctl_copy_to_user(struct mmc_ioc_cmd __user *ic_ptr,
386 struct mmc_blk_ioc_data *idata)
388 struct mmc_ioc_cmd *ic = &idata->ic;
390 if (copy_to_user(&(ic_ptr->response), ic->response,
391 sizeof(ic->response)))
394 if (!idata->ic.write_flag) {
395 if (copy_to_user((void __user *)(unsigned long)ic->data_ptr,
396 idata->buf, idata->buf_bytes))
403 static int ioctl_rpmb_card_status_poll(struct mmc_card *card, u32 *status,
409 if (!status || !retries_max)
413 err = get_card_status(card, status, 5);
417 if (!R1_STATUS(*status) &&
418 (R1_CURRENT_STATE(*status) != R1_STATE_PRG))
419 break; /* RPMB programming operation complete */
422 * Rechedule to give the MMC device a chance to continue
423 * processing the previous command without being polled too
426 usleep_range(1000, 5000);
427 } while (++retry_count < retries_max);
429 if (retry_count == retries_max)
435 static int ioctl_do_sanitize(struct mmc_card *card)
439 if (!mmc_can_sanitize(card)) {
440 pr_warn("%s: %s - SANITIZE is not supported\n",
441 mmc_hostname(card->host), __func__);
446 pr_debug("%s: %s - SANITIZE IN PROGRESS...\n",
447 mmc_hostname(card->host), __func__);
449 trace_mmc_blk_erase_start(EXT_CSD_SANITIZE_START, 0, 0);
450 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
451 EXT_CSD_SANITIZE_START, 1,
452 MMC_SANITIZE_REQ_TIMEOUT);
453 trace_mmc_blk_erase_end(EXT_CSD_SANITIZE_START, 0, 0);
456 pr_err("%s: %s - EXT_CSD_SANITIZE_START failed. err=%d\n",
457 mmc_hostname(card->host), __func__, err);
459 pr_debug("%s: %s - SANITIZE COMPLETED\n", mmc_hostname(card->host),
465 static int __mmc_blk_ioctl_cmd(struct mmc_card *card, struct mmc_blk_data *md,
466 struct mmc_blk_ioc_data *idata)
468 struct mmc_command cmd = {0};
469 struct mmc_data data = {0};
470 struct mmc_request mrq = {NULL};
471 struct scatterlist sg;
476 if (!card || !md || !idata)
479 if (md->area_type & MMC_BLK_DATA_AREA_RPMB)
482 cmd.opcode = idata->ic.opcode;
483 cmd.arg = idata->ic.arg;
484 cmd.flags = idata->ic.flags;
486 if (idata->buf_bytes) {
489 data.blksz = idata->ic.blksz;
490 data.blocks = idata->ic.blocks;
492 sg_init_one(data.sg, idata->buf, idata->buf_bytes);
494 if (idata->ic.write_flag)
495 data.flags = MMC_DATA_WRITE;
497 data.flags = MMC_DATA_READ;
499 /* data.flags must already be set before doing this. */
500 mmc_set_data_timeout(&data, card);
502 /* Allow overriding the timeout_ns for empirical tuning. */
503 if (idata->ic.data_timeout_ns)
504 data.timeout_ns = idata->ic.data_timeout_ns;
506 if ((cmd.flags & MMC_RSP_R1B) == MMC_RSP_R1B) {
508 * Pretend this is a data transfer and rely on the
509 * host driver to compute timeout. When all host
510 * drivers support cmd.cmd_timeout for R1B, this
514 * cmd.cmd_timeout = idata->ic.cmd_timeout_ms;
516 data.timeout_ns = idata->ic.cmd_timeout_ms * 1000000;
524 err = mmc_blk_part_switch(card, md);
528 if (idata->ic.is_acmd) {
529 err = mmc_app_cmd(card->host, card);
535 err = mmc_set_blockcount(card, data.blocks,
536 idata->ic.write_flag & (1 << 31));
541 if ((MMC_EXTRACT_INDEX_FROM_ARG(cmd.arg) == EXT_CSD_SANITIZE_START) &&
542 (cmd.opcode == MMC_SWITCH)) {
543 err = ioctl_do_sanitize(card);
546 pr_err("%s: ioctl_do_sanitize() failed. err = %d",
552 mmc_wait_for_req(card->host, &mrq);
555 dev_err(mmc_dev(card->host), "%s: cmd error %d\n",
556 __func__, cmd.error);
560 dev_err(mmc_dev(card->host), "%s: data error %d\n",
561 __func__, data.error);
566 * According to the SD specs, some commands require a delay after
567 * issuing the command.
569 if (idata->ic.postsleep_min_us)
570 usleep_range(idata->ic.postsleep_min_us, idata->ic.postsleep_max_us);
572 memcpy(&(idata->ic.response), cmd.resp, sizeof(cmd.resp));
576 * Ensure RPMB command has completed by polling CMD13
579 err = ioctl_rpmb_card_status_poll(card, &status, 5);
581 dev_err(mmc_dev(card->host),
582 "%s: Card Status=0x%08X, error %d\n",
583 __func__, status, err);
589 static int mmc_blk_ioctl_cmd(struct block_device *bdev,
590 struct mmc_ioc_cmd __user *ic_ptr)
592 struct mmc_blk_ioc_data *idata;
593 struct mmc_blk_data *md;
594 struct mmc_card *card;
595 int err = 0, ioc_err = 0;
597 idata = mmc_blk_ioctl_copy_from_user(ic_ptr);
599 return PTR_ERR(idata);
601 md = mmc_blk_get(bdev->bd_disk);
607 card = md->queue.card;
615 ioc_err = __mmc_blk_ioctl_cmd(card, md, idata);
619 err = mmc_blk_ioctl_copy_to_user(ic_ptr, idata);
626 return ioc_err ? ioc_err : err;
629 static int mmc_blk_ioctl_multi_cmd(struct block_device *bdev,
630 struct mmc_ioc_multi_cmd __user *user)
632 struct mmc_blk_ioc_data **idata = NULL;
633 struct mmc_ioc_cmd __user *cmds = user->cmds;
634 struct mmc_card *card;
635 struct mmc_blk_data *md;
636 int i, err = 0, ioc_err = 0;
639 if (copy_from_user(&num_of_cmds, &user->num_of_cmds,
640 sizeof(num_of_cmds)))
643 if (num_of_cmds > MMC_IOC_MAX_CMDS)
646 idata = kcalloc(num_of_cmds, sizeof(*idata), GFP_KERNEL);
650 for (i = 0; i < num_of_cmds; i++) {
651 idata[i] = mmc_blk_ioctl_copy_from_user(&cmds[i]);
652 if (IS_ERR(idata[i])) {
653 err = PTR_ERR(idata[i]);
659 md = mmc_blk_get(bdev->bd_disk);
663 card = md->queue.card;
671 for (i = 0; i < num_of_cmds && !ioc_err; i++)
672 ioc_err = __mmc_blk_ioctl_cmd(card, md, idata[i]);
676 /* copy to user if data and response */
677 for (i = 0; i < num_of_cmds && !err; i++)
678 err = mmc_blk_ioctl_copy_to_user(&cmds[i], idata[i]);
683 for (i = 0; i < num_of_cmds; i++) {
684 kfree(idata[i]->buf);
688 return ioc_err ? ioc_err : err;
691 static int mmc_blk_ioctl(struct block_device *bdev, fmode_t mode,
692 unsigned int cmd, unsigned long arg)
695 * The caller must have CAP_SYS_RAWIO, and must be calling this on the
696 * whole block device, not on a partition. This prevents overspray
697 * between sibling partitions.
699 if ((!capable(CAP_SYS_RAWIO)) || (bdev != bdev->bd_contains))
704 return mmc_blk_ioctl_cmd(bdev,
705 (struct mmc_ioc_cmd __user *)arg);
706 case MMC_IOC_MULTI_CMD:
707 return mmc_blk_ioctl_multi_cmd(bdev,
708 (struct mmc_ioc_multi_cmd __user *)arg);
715 static int mmc_blk_compat_ioctl(struct block_device *bdev, fmode_t mode,
716 unsigned int cmd, unsigned long arg)
718 return mmc_blk_ioctl(bdev, mode, cmd, (unsigned long) compat_ptr(arg));
722 static const struct block_device_operations mmc_bdops = {
723 .open = mmc_blk_open,
724 .release = mmc_blk_release,
725 .getgeo = mmc_blk_getgeo,
726 .owner = THIS_MODULE,
727 .ioctl = mmc_blk_ioctl,
729 .compat_ioctl = mmc_blk_compat_ioctl,
733 static inline int mmc_blk_part_switch(struct mmc_card *card,
734 struct mmc_blk_data *md)
737 struct mmc_blk_data *main_md = dev_get_drvdata(&card->dev);
739 if (main_md->part_curr == md->part_type)
742 if (mmc_card_mmc(card)) {
743 u8 part_config = card->ext_csd.part_config;
745 part_config &= ~EXT_CSD_PART_CONFIG_ACC_MASK;
746 part_config |= md->part_type;
748 ret = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
749 EXT_CSD_PART_CONFIG, part_config,
750 card->ext_csd.part_time);
754 card->ext_csd.part_config = part_config;
757 main_md->part_curr = md->part_type;
761 static u32 mmc_sd_num_wr_blocks(struct mmc_card *card)
767 struct mmc_request mrq = {NULL};
768 struct mmc_command cmd = {0};
769 struct mmc_data data = {0};
771 struct scatterlist sg;
773 cmd.opcode = MMC_APP_CMD;
774 cmd.arg = card->rca << 16;
775 cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC;
777 err = mmc_wait_for_cmd(card->host, &cmd, 0);
780 if (!mmc_host_is_spi(card->host) && !(cmd.resp[0] & R1_APP_CMD))
783 memset(&cmd, 0, sizeof(struct mmc_command));
785 cmd.opcode = SD_APP_SEND_NUM_WR_BLKS;
787 cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC;
791 data.flags = MMC_DATA_READ;
794 mmc_set_data_timeout(&data, card);
799 blocks = kmalloc(4, GFP_KERNEL);
803 sg_init_one(&sg, blocks, 4);
805 mmc_wait_for_req(card->host, &mrq);
807 result = ntohl(*blocks);
810 if (cmd.error || data.error)
816 static int get_card_status(struct mmc_card *card, u32 *status, int retries)
818 struct mmc_command cmd = {0};
821 cmd.opcode = MMC_SEND_STATUS;
822 if (!mmc_host_is_spi(card->host))
823 cmd.arg = card->rca << 16;
824 cmd.flags = MMC_RSP_SPI_R2 | MMC_RSP_R1 | MMC_CMD_AC;
825 err = mmc_wait_for_cmd(card->host, &cmd, retries);
827 *status = cmd.resp[0];
831 static int card_busy_detect(struct mmc_card *card, unsigned int timeout_ms,
832 bool hw_busy_detect, struct request *req, int *gen_err)
834 unsigned long timeout = jiffies + msecs_to_jiffies(timeout_ms);
839 err = get_card_status(card, &status, 5);
841 pr_err("%s: error %d requesting status\n",
842 req->rq_disk->disk_name, err);
846 if (status & R1_ERROR) {
847 pr_err("%s: %s: error sending status cmd, status %#x\n",
848 req->rq_disk->disk_name, __func__, status);
852 /* We may rely on the host hw to handle busy detection.*/
853 if ((card->host->caps & MMC_CAP_WAIT_WHILE_BUSY) &&
858 * Timeout if the device never becomes ready for data and never
859 * leaves the program state.
861 if (time_after(jiffies, timeout)) {
862 pr_err("%s: Card stuck in programming state! %s %s\n",
863 mmc_hostname(card->host),
864 req->rq_disk->disk_name, __func__);
869 * Some cards mishandle the status bits,
870 * so make sure to check both the busy
871 * indication and the card state.
873 } while (!(status & R1_READY_FOR_DATA) ||
874 (R1_CURRENT_STATE(status) == R1_STATE_PRG));
879 static int send_stop(struct mmc_card *card, unsigned int timeout_ms,
880 struct request *req, int *gen_err, u32 *stop_status)
882 struct mmc_host *host = card->host;
883 struct mmc_command cmd = {0};
885 bool use_r1b_resp = rq_data_dir(req) == WRITE;
888 * Normally we use R1B responses for WRITE, but in cases where the host
889 * has specified a max_busy_timeout we need to validate it. A failure
890 * means we need to prevent the host from doing hw busy detection, which
891 * is done by converting to a R1 response instead.
893 if (host->max_busy_timeout && (timeout_ms > host->max_busy_timeout))
894 use_r1b_resp = false;
896 cmd.opcode = MMC_STOP_TRANSMISSION;
898 cmd.flags = MMC_RSP_SPI_R1B | MMC_RSP_R1B | MMC_CMD_AC;
899 cmd.busy_timeout = timeout_ms;
901 cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC;
904 err = mmc_wait_for_cmd(host, &cmd, 5);
908 *stop_status = cmd.resp[0];
910 /* No need to check card status in case of READ. */
911 if (rq_data_dir(req) == READ)
914 if (!mmc_host_is_spi(host) &&
915 (*stop_status & R1_ERROR)) {
916 pr_err("%s: %s: general error sending stop command, resp %#x\n",
917 req->rq_disk->disk_name, __func__, *stop_status);
921 return card_busy_detect(card, timeout_ms, use_r1b_resp, req, gen_err);
924 #define ERR_NOMEDIUM 3
927 #define ERR_CONTINUE 0
929 static int mmc_blk_cmd_error(struct request *req, const char *name, int error,
930 bool status_valid, u32 status)
934 /* response crc error, retry the r/w cmd */
935 pr_err("%s: %s sending %s command, card status %#x\n",
936 req->rq_disk->disk_name, "response CRC error",
941 pr_err("%s: %s sending %s command, card status %#x\n",
942 req->rq_disk->disk_name, "timed out", name, status);
944 /* If the status cmd initially failed, retry the r/w cmd */
946 pr_err("%s: status not valid, retrying timeout\n", req->rq_disk->disk_name);
950 * If it was a r/w cmd crc error, or illegal command
951 * (eg, issued in wrong state) then retry - we should
952 * have corrected the state problem above.
954 if (status & (R1_COM_CRC_ERROR | R1_ILLEGAL_COMMAND)) {
955 pr_err("%s: command error, retrying timeout\n", req->rq_disk->disk_name);
959 /* Otherwise abort the command */
960 pr_err("%s: not retrying timeout\n", req->rq_disk->disk_name);
964 /* We don't understand the error code the driver gave us */
965 pr_err("%s: unknown error %d sending read/write command, card status %#x\n",
966 req->rq_disk->disk_name, error, status);
972 * Initial r/w and stop cmd error recovery.
973 * We don't know whether the card received the r/w cmd or not, so try to
974 * restore things back to a sane state. Essentially, we do this as follows:
975 * - Obtain card status. If the first attempt to obtain card status fails,
976 * the status word will reflect the failed status cmd, not the failed
977 * r/w cmd. If we fail to obtain card status, it suggests we can no
978 * longer communicate with the card.
979 * - Check the card state. If the card received the cmd but there was a
980 * transient problem with the response, it might still be in a data transfer
981 * mode. Try to send it a stop command. If this fails, we can't recover.
982 * - If the r/w cmd failed due to a response CRC error, it was probably
983 * transient, so retry the cmd.
984 * - If the r/w cmd timed out, but we didn't get the r/w cmd status, retry.
985 * - If the r/w cmd timed out, and the r/w cmd failed due to CRC error or
986 * illegal cmd, retry.
987 * Otherwise we don't understand what happened, so abort.
989 static int mmc_blk_cmd_recovery(struct mmc_card *card, struct request *req,
990 struct mmc_blk_request *brq, int *ecc_err, int *gen_err)
992 bool prev_cmd_status_valid = true;
993 u32 status, stop_status = 0;
996 if (mmc_card_removed(card))
1000 * Try to get card status which indicates both the card state
1001 * and why there was no response. If the first attempt fails,
1002 * we can't be sure the returned status is for the r/w command.
1004 for (retry = 2; retry >= 0; retry--) {
1005 err = get_card_status(card, &status, 0);
1009 /* Re-tune if needed */
1010 mmc_retune_recheck(card->host);
1012 prev_cmd_status_valid = false;
1013 pr_err("%s: error %d sending status command, %sing\n",
1014 req->rq_disk->disk_name, err, retry ? "retry" : "abort");
1017 /* We couldn't get a response from the card. Give up. */
1019 /* Check if the card is removed */
1020 if (mmc_detect_card_removed(card->host))
1021 return ERR_NOMEDIUM;
1025 /* Flag ECC errors */
1026 if ((status & R1_CARD_ECC_FAILED) ||
1027 (brq->stop.resp[0] & R1_CARD_ECC_FAILED) ||
1028 (brq->cmd.resp[0] & R1_CARD_ECC_FAILED))
1031 /* Flag General errors */
1032 if (!mmc_host_is_spi(card->host) && rq_data_dir(req) != READ)
1033 if ((status & R1_ERROR) ||
1034 (brq->stop.resp[0] & R1_ERROR)) {
1035 pr_err("%s: %s: general error sending stop or status command, stop cmd response %#x, card status %#x\n",
1036 req->rq_disk->disk_name, __func__,
1037 brq->stop.resp[0], status);
1042 * Check the current card state. If it is in some data transfer
1043 * mode, tell it to stop (and hopefully transition back to TRAN.)
1045 if (R1_CURRENT_STATE(status) == R1_STATE_DATA ||
1046 R1_CURRENT_STATE(status) == R1_STATE_RCV) {
1047 err = send_stop(card,
1048 DIV_ROUND_UP(brq->data.timeout_ns, 1000000),
1049 req, gen_err, &stop_status);
1051 pr_err("%s: error %d sending stop command\n",
1052 req->rq_disk->disk_name, err);
1054 * If the stop cmd also timed out, the card is probably
1055 * not present, so abort. Other errors are bad news too.
1060 if (stop_status & R1_CARD_ECC_FAILED)
1064 /* Check for set block count errors */
1066 return mmc_blk_cmd_error(req, "SET_BLOCK_COUNT", brq->sbc.error,
1067 prev_cmd_status_valid, status);
1069 /* Check for r/w command errors */
1071 return mmc_blk_cmd_error(req, "r/w cmd", brq->cmd.error,
1072 prev_cmd_status_valid, status);
1075 if (!brq->stop.error)
1076 return ERR_CONTINUE;
1078 /* Now for stop errors. These aren't fatal to the transfer. */
1079 pr_info("%s: error %d sending stop command, original cmd response %#x, card status %#x\n",
1080 req->rq_disk->disk_name, brq->stop.error,
1081 brq->cmd.resp[0], status);
1084 * Subsitute in our own stop status as this will give the error
1085 * state which happened during the execution of the r/w command.
1088 brq->stop.resp[0] = stop_status;
1089 brq->stop.error = 0;
1091 return ERR_CONTINUE;
1094 static int mmc_blk_reset(struct mmc_blk_data *md, struct mmc_host *host,
1099 if (md->reset_done & type)
1102 md->reset_done |= type;
1103 err = mmc_hw_reset(host);
1104 /* Ensure we switch back to the correct partition */
1105 if (err != -EOPNOTSUPP) {
1106 struct mmc_blk_data *main_md =
1107 dev_get_drvdata(&host->card->dev);
1110 main_md->part_curr = main_md->part_type;
1111 part_err = mmc_blk_part_switch(host->card, md);
1114 * We have failed to get back into the correct
1115 * partition, so we need to abort the whole request.
1123 static inline void mmc_blk_reset_success(struct mmc_blk_data *md, int type)
1125 md->reset_done &= ~type;
1128 int mmc_access_rpmb(struct mmc_queue *mq)
1130 struct mmc_blk_data *md = mq->data;
1132 * If this is a RPMB partition access, return ture
1134 if (md && md->part_type == EXT_CSD_PART_CONFIG_ACC_RPMB)
1140 static int mmc_blk_issue_discard_rq(struct mmc_queue *mq, struct request *req)
1142 struct mmc_blk_data *md = mq->data;
1143 struct mmc_card *card = md->queue.card;
1144 unsigned int from, nr, arg;
1145 int err = 0, type = MMC_BLK_DISCARD;
1147 if (!mmc_can_erase(card)) {
1152 from = blk_rq_pos(req);
1153 nr = blk_rq_sectors(req);
1155 if (mmc_can_discard(card))
1156 arg = MMC_DISCARD_ARG;
1157 else if (mmc_can_trim(card))
1160 arg = MMC_ERASE_ARG;
1162 if (card->quirks & MMC_QUIRK_INAND_CMD38) {
1163 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1164 INAND_CMD38_ARG_EXT_CSD,
1165 arg == MMC_TRIM_ARG ?
1166 INAND_CMD38_ARG_TRIM :
1167 INAND_CMD38_ARG_ERASE,
1172 err = mmc_erase(card, from, nr, arg);
1174 if (err == -EIO && !mmc_blk_reset(md, card->host, type))
1177 mmc_blk_reset_success(md, type);
1178 blk_end_request(req, err, blk_rq_bytes(req));
1183 static int mmc_blk_issue_secdiscard_rq(struct mmc_queue *mq,
1184 struct request *req)
1186 struct mmc_blk_data *md = mq->data;
1187 struct mmc_card *card = md->queue.card;
1188 unsigned int from, nr, arg;
1189 int err = 0, type = MMC_BLK_SECDISCARD;
1191 if (!(mmc_can_secure_erase_trim(card))) {
1196 from = blk_rq_pos(req);
1197 nr = blk_rq_sectors(req);
1199 if (mmc_can_trim(card) && !mmc_erase_group_aligned(card, from, nr))
1200 arg = MMC_SECURE_TRIM1_ARG;
1202 arg = MMC_SECURE_ERASE_ARG;
1205 if (card->quirks & MMC_QUIRK_INAND_CMD38) {
1206 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1207 INAND_CMD38_ARG_EXT_CSD,
1208 arg == MMC_SECURE_TRIM1_ARG ?
1209 INAND_CMD38_ARG_SECTRIM1 :
1210 INAND_CMD38_ARG_SECERASE,
1216 err = mmc_erase(card, from, nr, arg);
1222 if (arg == MMC_SECURE_TRIM1_ARG) {
1223 if (card->quirks & MMC_QUIRK_INAND_CMD38) {
1224 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1225 INAND_CMD38_ARG_EXT_CSD,
1226 INAND_CMD38_ARG_SECTRIM2,
1232 err = mmc_erase(card, from, nr, MMC_SECURE_TRIM2_ARG);
1240 if (err && !mmc_blk_reset(md, card->host, type))
1243 mmc_blk_reset_success(md, type);
1245 blk_end_request(req, err, blk_rq_bytes(req));
1250 static int mmc_blk_issue_flush(struct mmc_queue *mq, struct request *req)
1252 struct mmc_blk_data *md = mq->data;
1253 struct mmc_card *card = md->queue.card;
1256 ret = mmc_flush_cache(card);
1260 blk_end_request_all(req, ret);
1266 * Reformat current write as a reliable write, supporting
1267 * both legacy and the enhanced reliable write MMC cards.
1268 * In each transfer we'll handle only as much as a single
1269 * reliable write can handle, thus finish the request in
1270 * partial completions.
1272 static inline void mmc_apply_rel_rw(struct mmc_blk_request *brq,
1273 struct mmc_card *card,
1274 struct request *req)
1276 if (!(card->ext_csd.rel_param & EXT_CSD_WR_REL_PARAM_EN)) {
1277 /* Legacy mode imposes restrictions on transfers. */
1278 if (!IS_ALIGNED(brq->cmd.arg, card->ext_csd.rel_sectors))
1279 brq->data.blocks = 1;
1281 if (brq->data.blocks > card->ext_csd.rel_sectors)
1282 brq->data.blocks = card->ext_csd.rel_sectors;
1283 else if (brq->data.blocks < card->ext_csd.rel_sectors)
1284 brq->data.blocks = 1;
1288 #define CMD_ERRORS \
1289 (R1_OUT_OF_RANGE | /* Command argument out of range */ \
1290 R1_ADDRESS_ERROR | /* Misaligned address */ \
1291 R1_BLOCK_LEN_ERROR | /* Transferred block length incorrect */\
1292 R1_WP_VIOLATION | /* Tried to write to protected block */ \
1293 R1_CC_ERROR | /* Card controller error */ \
1294 R1_ERROR) /* General/unknown error */
1296 static int mmc_blk_err_check(struct mmc_card *card,
1297 struct mmc_async_req *areq)
1299 struct mmc_queue_req *mq_mrq = container_of(areq, struct mmc_queue_req,
1301 struct mmc_blk_request *brq = &mq_mrq->brq;
1302 struct request *req = mq_mrq->req;
1303 int need_retune = card->host->need_retune;
1304 int ecc_err = 0, gen_err = 0;
1307 * sbc.error indicates a problem with the set block count
1308 * command. No data will have been transferred.
1310 * cmd.error indicates a problem with the r/w command. No
1311 * data will have been transferred.
1313 * stop.error indicates a problem with the stop command. Data
1314 * may have been transferred, or may still be transferring.
1316 if (brq->sbc.error || brq->cmd.error || brq->stop.error ||
1318 switch (mmc_blk_cmd_recovery(card, req, brq, &ecc_err, &gen_err)) {
1320 return MMC_BLK_RETRY;
1322 return MMC_BLK_ABORT;
1324 return MMC_BLK_NOMEDIUM;
1331 * Check for errors relating to the execution of the
1332 * initial command - such as address errors. No data
1333 * has been transferred.
1335 if (brq->cmd.resp[0] & CMD_ERRORS) {
1336 pr_err("%s: r/w command failed, status = %#x\n",
1337 req->rq_disk->disk_name, brq->cmd.resp[0]);
1338 return MMC_BLK_ABORT;
1342 * Everything else is either success, or a data error of some
1343 * kind. If it was a write, we may have transitioned to
1344 * program mode, which we have to wait for it to complete.
1346 if (!mmc_host_is_spi(card->host) && rq_data_dir(req) != READ) {
1349 /* Check stop command response */
1350 if (brq->stop.resp[0] & R1_ERROR) {
1351 pr_err("%s: %s: general error sending stop command, stop cmd response %#x\n",
1352 req->rq_disk->disk_name, __func__,
1357 err = card_busy_detect(card, MMC_BLK_TIMEOUT_MS, false, req,
1360 return MMC_BLK_CMD_ERR;
1363 /* if general error occurs, retry the write operation. */
1365 pr_warn("%s: retrying write for general error\n",
1366 req->rq_disk->disk_name);
1367 return MMC_BLK_RETRY;
1370 if (brq->data.error) {
1371 if (need_retune && !brq->retune_retry_done) {
1372 pr_info("%s: retrying because a re-tune was needed\n",
1373 req->rq_disk->disk_name);
1374 brq->retune_retry_done = 1;
1375 return MMC_BLK_RETRY;
1377 pr_err("%s: error %d transferring data, sector %u, nr %u, cmd response %#x, card status %#x\n",
1378 req->rq_disk->disk_name, brq->data.error,
1379 (unsigned)blk_rq_pos(req),
1380 (unsigned)blk_rq_sectors(req),
1381 brq->cmd.resp[0], brq->stop.resp[0]);
1383 if (rq_data_dir(req) == READ) {
1385 return MMC_BLK_ECC_ERR;
1386 return MMC_BLK_DATA_ERR;
1388 return MMC_BLK_CMD_ERR;
1392 if (!brq->data.bytes_xfered)
1393 return MMC_BLK_RETRY;
1395 if (mmc_packed_cmd(mq_mrq->cmd_type)) {
1396 if (unlikely(brq->data.blocks << 9 != brq->data.bytes_xfered))
1397 return MMC_BLK_PARTIAL;
1399 return MMC_BLK_SUCCESS;
1402 if (blk_rq_bytes(req) != brq->data.bytes_xfered)
1403 return MMC_BLK_PARTIAL;
1405 return MMC_BLK_SUCCESS;
1408 static int mmc_blk_packed_err_check(struct mmc_card *card,
1409 struct mmc_async_req *areq)
1411 struct mmc_queue_req *mq_rq = container_of(areq, struct mmc_queue_req,
1413 struct request *req = mq_rq->req;
1414 struct mmc_packed *packed = mq_rq->packed;
1415 int err, check, status;
1421 check = mmc_blk_err_check(card, areq);
1422 err = get_card_status(card, &status, 0);
1424 pr_err("%s: error %d sending status command\n",
1425 req->rq_disk->disk_name, err);
1426 return MMC_BLK_ABORT;
1429 if (status & R1_EXCEPTION_EVENT) {
1430 err = mmc_get_ext_csd(card, &ext_csd);
1432 pr_err("%s: error %d sending ext_csd\n",
1433 req->rq_disk->disk_name, err);
1434 return MMC_BLK_ABORT;
1437 if ((ext_csd[EXT_CSD_EXP_EVENTS_STATUS] &
1438 EXT_CSD_PACKED_FAILURE) &&
1439 (ext_csd[EXT_CSD_PACKED_CMD_STATUS] &
1440 EXT_CSD_PACKED_GENERIC_ERROR)) {
1441 if (ext_csd[EXT_CSD_PACKED_CMD_STATUS] &
1442 EXT_CSD_PACKED_INDEXED_ERROR) {
1443 packed->idx_failure =
1444 ext_csd[EXT_CSD_PACKED_FAILURE_INDEX] - 1;
1445 check = MMC_BLK_PARTIAL;
1447 pr_err("%s: packed cmd failed, nr %u, sectors %u, "
1448 "failure index: %d\n",
1449 req->rq_disk->disk_name, packed->nr_entries,
1450 packed->blocks, packed->idx_failure);
1458 static void mmc_blk_rw_rq_prep(struct mmc_queue_req *mqrq,
1459 struct mmc_card *card,
1461 struct mmc_queue *mq)
1463 u32 readcmd, writecmd;
1464 struct mmc_blk_request *brq = &mqrq->brq;
1465 struct request *req = mqrq->req;
1466 struct mmc_blk_data *md = mq->data;
1470 * Reliable writes are used to implement Forced Unit Access and
1471 * are supported only on MMCs.
1473 bool do_rel_wr = (req->cmd_flags & REQ_FUA) &&
1474 (rq_data_dir(req) == WRITE) &&
1475 (md->flags & MMC_BLK_REL_WR);
1477 memset(brq, 0, sizeof(struct mmc_blk_request));
1478 brq->mrq.cmd = &brq->cmd;
1479 brq->mrq.data = &brq->data;
1481 brq->cmd.arg = blk_rq_pos(req);
1482 if (!mmc_card_blockaddr(card))
1484 brq->cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC;
1485 brq->data.blksz = 512;
1486 brq->stop.opcode = MMC_STOP_TRANSMISSION;
1488 brq->data.blocks = blk_rq_sectors(req);
1491 * The block layer doesn't support all sector count
1492 * restrictions, so we need to be prepared for too big
1495 if (brq->data.blocks > card->host->max_blk_count)
1496 brq->data.blocks = card->host->max_blk_count;
1498 if (brq->data.blocks > 1) {
1500 * After a read error, we redo the request one sector
1501 * at a time in order to accurately determine which
1502 * sectors can be read successfully.
1505 brq->data.blocks = 1;
1508 * Some controllers have HW issues while operating
1509 * in multiple I/O mode
1511 if (card->host->ops->multi_io_quirk)
1512 brq->data.blocks = card->host->ops->multi_io_quirk(card,
1513 (rq_data_dir(req) == READ) ?
1514 MMC_DATA_READ : MMC_DATA_WRITE,
1518 if (brq->data.blocks > 1 || do_rel_wr) {
1519 /* SPI multiblock writes terminate using a special
1520 * token, not a STOP_TRANSMISSION request.
1522 if (!mmc_host_is_spi(card->host) ||
1523 rq_data_dir(req) == READ)
1524 brq->mrq.stop = &brq->stop;
1525 readcmd = MMC_READ_MULTIPLE_BLOCK;
1526 writecmd = MMC_WRITE_MULTIPLE_BLOCK;
1528 brq->mrq.stop = NULL;
1529 readcmd = MMC_READ_SINGLE_BLOCK;
1530 writecmd = MMC_WRITE_BLOCK;
1532 if (rq_data_dir(req) == READ) {
1533 brq->cmd.opcode = readcmd;
1534 brq->data.flags |= MMC_DATA_READ;
1536 brq->stop.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 |
1539 brq->cmd.opcode = writecmd;
1540 brq->data.flags |= MMC_DATA_WRITE;
1542 brq->stop.flags = MMC_RSP_SPI_R1B | MMC_RSP_R1B |
1547 mmc_apply_rel_rw(brq, card, req);
1550 * Data tag is used only during writing meta data to speed
1551 * up write and any subsequent read of this meta data
1553 do_data_tag = (card->ext_csd.data_tag_unit_size) &&
1554 (req->cmd_flags & REQ_META) &&
1555 (rq_data_dir(req) == WRITE) &&
1556 ((brq->data.blocks * brq->data.blksz) >=
1557 card->ext_csd.data_tag_unit_size);
1560 * Pre-defined multi-block transfers are preferable to
1561 * open ended-ones (and necessary for reliable writes).
1562 * However, it is not sufficient to just send CMD23,
1563 * and avoid the final CMD12, as on an error condition
1564 * CMD12 (stop) needs to be sent anyway. This, coupled
1565 * with Auto-CMD23 enhancements provided by some
1566 * hosts, means that the complexity of dealing
1567 * with this is best left to the host. If CMD23 is
1568 * supported by card and host, we'll fill sbc in and let
1569 * the host deal with handling it correctly. This means
1570 * that for hosts that don't expose MMC_CAP_CMD23, no
1571 * change of behavior will be observed.
1573 * N.B: Some MMC cards experience perf degradation.
1574 * We'll avoid using CMD23-bounded multiblock writes for
1575 * these, while retaining features like reliable writes.
1577 if ((md->flags & MMC_BLK_CMD23) && mmc_op_multi(brq->cmd.opcode) &&
1578 (do_rel_wr || !(card->quirks & MMC_QUIRK_BLK_NO_CMD23) ||
1580 brq->sbc.opcode = MMC_SET_BLOCK_COUNT;
1581 brq->sbc.arg = brq->data.blocks |
1582 (do_rel_wr ? (1 << 31) : 0) |
1583 (do_data_tag ? (1 << 29) : 0);
1584 brq->sbc.flags = MMC_RSP_R1 | MMC_CMD_AC;
1585 brq->mrq.sbc = &brq->sbc;
1588 mmc_set_data_timeout(&brq->data, card);
1590 brq->data.sg = mqrq->sg;
1591 brq->data.sg_len = mmc_queue_map_sg(mq, mqrq);
1594 * Adjust the sg list so it is the same size as the
1597 if (brq->data.blocks != blk_rq_sectors(req)) {
1598 int i, data_size = brq->data.blocks << 9;
1599 struct scatterlist *sg;
1601 for_each_sg(brq->data.sg, sg, brq->data.sg_len, i) {
1602 data_size -= sg->length;
1603 if (data_size <= 0) {
1604 sg->length += data_size;
1609 brq->data.sg_len = i;
1612 mqrq->mmc_active.mrq = &brq->mrq;
1613 mqrq->mmc_active.err_check = mmc_blk_err_check;
1615 mmc_queue_bounce_pre(mqrq);
1618 static inline u8 mmc_calc_packed_hdr_segs(struct request_queue *q,
1619 struct mmc_card *card)
1621 unsigned int hdr_sz = mmc_large_sector(card) ? 4096 : 512;
1622 unsigned int max_seg_sz = queue_max_segment_size(q);
1623 unsigned int len, nr_segs = 0;
1626 len = min(hdr_sz, max_seg_sz);
1634 static u8 mmc_blk_prep_packed_list(struct mmc_queue *mq, struct request *req)
1636 struct request_queue *q = mq->queue;
1637 struct mmc_card *card = mq->card;
1638 struct request *cur = req, *next = NULL;
1639 struct mmc_blk_data *md = mq->data;
1640 struct mmc_queue_req *mqrq = mq->mqrq_cur;
1641 bool en_rel_wr = card->ext_csd.rel_param & EXT_CSD_WR_REL_PARAM_EN;
1642 unsigned int req_sectors = 0, phys_segments = 0;
1643 unsigned int max_blk_count, max_phys_segs;
1644 bool put_back = true;
1645 u8 max_packed_rw = 0;
1648 if (!(md->flags & MMC_BLK_PACKED_CMD))
1651 if ((rq_data_dir(cur) == WRITE) &&
1652 mmc_host_packed_wr(card->host))
1653 max_packed_rw = card->ext_csd.max_packed_writes;
1655 if (max_packed_rw == 0)
1658 if (mmc_req_rel_wr(cur) &&
1659 (md->flags & MMC_BLK_REL_WR) && !en_rel_wr)
1662 if (mmc_large_sector(card) &&
1663 !IS_ALIGNED(blk_rq_sectors(cur), 8))
1666 mmc_blk_clear_packed(mqrq);
1668 max_blk_count = min(card->host->max_blk_count,
1669 card->host->max_req_size >> 9);
1670 if (unlikely(max_blk_count > 0xffff))
1671 max_blk_count = 0xffff;
1673 max_phys_segs = queue_max_segments(q);
1674 req_sectors += blk_rq_sectors(cur);
1675 phys_segments += cur->nr_phys_segments;
1677 if (rq_data_dir(cur) == WRITE) {
1678 req_sectors += mmc_large_sector(card) ? 8 : 1;
1679 phys_segments += mmc_calc_packed_hdr_segs(q, card);
1683 if (reqs >= max_packed_rw - 1) {
1688 spin_lock_irq(q->queue_lock);
1689 next = blk_fetch_request(q);
1690 spin_unlock_irq(q->queue_lock);
1696 if (mmc_large_sector(card) &&
1697 !IS_ALIGNED(blk_rq_sectors(next), 8))
1700 if (next->cmd_flags & REQ_DISCARD ||
1701 next->cmd_flags & REQ_FLUSH)
1704 if (rq_data_dir(cur) != rq_data_dir(next))
1707 if (mmc_req_rel_wr(next) &&
1708 (md->flags & MMC_BLK_REL_WR) && !en_rel_wr)
1711 req_sectors += blk_rq_sectors(next);
1712 if (req_sectors > max_blk_count)
1715 phys_segments += next->nr_phys_segments;
1716 if (phys_segments > max_phys_segs)
1719 list_add_tail(&next->queuelist, &mqrq->packed->list);
1725 spin_lock_irq(q->queue_lock);
1726 blk_requeue_request(q, next);
1727 spin_unlock_irq(q->queue_lock);
1731 list_add(&req->queuelist, &mqrq->packed->list);
1732 mqrq->packed->nr_entries = ++reqs;
1733 mqrq->packed->retries = reqs;
1738 mqrq->cmd_type = MMC_PACKED_NONE;
1742 static void mmc_blk_packed_hdr_wrq_prep(struct mmc_queue_req *mqrq,
1743 struct mmc_card *card,
1744 struct mmc_queue *mq)
1746 struct mmc_blk_request *brq = &mqrq->brq;
1747 struct request *req = mqrq->req;
1748 struct request *prq;
1749 struct mmc_blk_data *md = mq->data;
1750 struct mmc_packed *packed = mqrq->packed;
1751 bool do_rel_wr, do_data_tag;
1752 u32 *packed_cmd_hdr;
1758 mqrq->cmd_type = MMC_PACKED_WRITE;
1760 packed->idx_failure = MMC_PACKED_NR_IDX;
1762 packed_cmd_hdr = packed->cmd_hdr;
1763 memset(packed_cmd_hdr, 0, sizeof(packed->cmd_hdr));
1764 packed_cmd_hdr[0] = (packed->nr_entries << 16) |
1765 (PACKED_CMD_WR << 8) | PACKED_CMD_VER;
1766 hdr_blocks = mmc_large_sector(card) ? 8 : 1;
1769 * Argument for each entry of packed group
1771 list_for_each_entry(prq, &packed->list, queuelist) {
1772 do_rel_wr = mmc_req_rel_wr(prq) && (md->flags & MMC_BLK_REL_WR);
1773 do_data_tag = (card->ext_csd.data_tag_unit_size) &&
1774 (prq->cmd_flags & REQ_META) &&
1775 (rq_data_dir(prq) == WRITE) &&
1776 ((brq->data.blocks * brq->data.blksz) >=
1777 card->ext_csd.data_tag_unit_size);
1778 /* Argument of CMD23 */
1779 packed_cmd_hdr[(i * 2)] =
1780 (do_rel_wr ? MMC_CMD23_ARG_REL_WR : 0) |
1781 (do_data_tag ? MMC_CMD23_ARG_TAG_REQ : 0) |
1782 blk_rq_sectors(prq);
1783 /* Argument of CMD18 or CMD25 */
1784 packed_cmd_hdr[((i * 2)) + 1] =
1785 mmc_card_blockaddr(card) ?
1786 blk_rq_pos(prq) : blk_rq_pos(prq) << 9;
1787 packed->blocks += blk_rq_sectors(prq);
1791 memset(brq, 0, sizeof(struct mmc_blk_request));
1792 brq->mrq.cmd = &brq->cmd;
1793 brq->mrq.data = &brq->data;
1794 brq->mrq.sbc = &brq->sbc;
1795 brq->mrq.stop = &brq->stop;
1797 brq->sbc.opcode = MMC_SET_BLOCK_COUNT;
1798 brq->sbc.arg = MMC_CMD23_ARG_PACKED | (packed->blocks + hdr_blocks);
1799 brq->sbc.flags = MMC_RSP_R1 | MMC_CMD_AC;
1801 brq->cmd.opcode = MMC_WRITE_MULTIPLE_BLOCK;
1802 brq->cmd.arg = blk_rq_pos(req);
1803 if (!mmc_card_blockaddr(card))
1805 brq->cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC;
1807 brq->data.blksz = 512;
1808 brq->data.blocks = packed->blocks + hdr_blocks;
1809 brq->data.flags |= MMC_DATA_WRITE;
1811 brq->stop.opcode = MMC_STOP_TRANSMISSION;
1813 brq->stop.flags = MMC_RSP_SPI_R1B | MMC_RSP_R1B | MMC_CMD_AC;
1815 mmc_set_data_timeout(&brq->data, card);
1817 brq->data.sg = mqrq->sg;
1818 brq->data.sg_len = mmc_queue_map_sg(mq, mqrq);
1820 mqrq->mmc_active.mrq = &brq->mrq;
1821 mqrq->mmc_active.err_check = mmc_blk_packed_err_check;
1823 mmc_queue_bounce_pre(mqrq);
1826 static int mmc_blk_cmd_err(struct mmc_blk_data *md, struct mmc_card *card,
1827 struct mmc_blk_request *brq, struct request *req,
1830 struct mmc_queue_req *mq_rq;
1831 mq_rq = container_of(brq, struct mmc_queue_req, brq);
1834 * If this is an SD card and we're writing, we can first
1835 * mark the known good sectors as ok.
1837 * If the card is not SD, we can still ok written sectors
1838 * as reported by the controller (which might be less than
1839 * the real number of written sectors, but never more).
1841 if (mmc_card_sd(card)) {
1844 blocks = mmc_sd_num_wr_blocks(card);
1845 if (blocks != (u32)-1) {
1846 ret = blk_end_request(req, 0, blocks << 9);
1849 if (!mmc_packed_cmd(mq_rq->cmd_type))
1850 ret = blk_end_request(req, 0, brq->data.bytes_xfered);
1855 static int mmc_blk_end_packed_req(struct mmc_queue_req *mq_rq)
1857 struct request *prq;
1858 struct mmc_packed *packed = mq_rq->packed;
1859 int idx = packed->idx_failure, i = 0;
1864 while (!list_empty(&packed->list)) {
1865 prq = list_entry_rq(packed->list.next);
1867 /* retry from error index */
1868 packed->nr_entries -= idx;
1872 if (packed->nr_entries == MMC_PACKED_NR_SINGLE) {
1873 list_del_init(&prq->queuelist);
1874 mmc_blk_clear_packed(mq_rq);
1878 list_del_init(&prq->queuelist);
1879 blk_end_request(prq, 0, blk_rq_bytes(prq));
1883 mmc_blk_clear_packed(mq_rq);
1887 static void mmc_blk_abort_packed_req(struct mmc_queue_req *mq_rq)
1889 struct request *prq;
1890 struct mmc_packed *packed = mq_rq->packed;
1894 while (!list_empty(&packed->list)) {
1895 prq = list_entry_rq(packed->list.next);
1896 list_del_init(&prq->queuelist);
1897 blk_end_request(prq, -EIO, blk_rq_bytes(prq));
1900 mmc_blk_clear_packed(mq_rq);
1903 static void mmc_blk_revert_packed_req(struct mmc_queue *mq,
1904 struct mmc_queue_req *mq_rq)
1906 struct request *prq;
1907 struct request_queue *q = mq->queue;
1908 struct mmc_packed *packed = mq_rq->packed;
1912 while (!list_empty(&packed->list)) {
1913 prq = list_entry_rq(packed->list.prev);
1914 if (prq->queuelist.prev != &packed->list) {
1915 list_del_init(&prq->queuelist);
1916 spin_lock_irq(q->queue_lock);
1917 blk_requeue_request(mq->queue, prq);
1918 spin_unlock_irq(q->queue_lock);
1920 list_del_init(&prq->queuelist);
1924 mmc_blk_clear_packed(mq_rq);
1927 static int mmc_blk_issue_rw_rq(struct mmc_queue *mq, struct request *rqc)
1929 struct mmc_blk_data *md = mq->data;
1930 struct mmc_card *card = md->queue.card;
1931 struct mmc_blk_request *brq = &mq->mqrq_cur->brq;
1932 int ret = 1, disable_multi = 0, retry = 0, type, retune_retry_done = 0;
1933 enum mmc_blk_status status;
1934 struct mmc_queue_req *mq_rq;
1935 struct request *req = rqc;
1936 struct mmc_async_req *areq;
1937 const u8 packed_nr = 2;
1940 if (!rqc && !mq->mqrq_prev->req)
1944 reqs = mmc_blk_prep_packed_list(mq, rqc);
1949 * When 4KB native sector is enabled, only 8 blocks
1950 * multiple read or write is allowed
1952 if ((brq->data.blocks & 0x07) &&
1953 (card->ext_csd.data_sector_size == 4096)) {
1954 pr_err("%s: Transfer size is not 4KB sector size aligned\n",
1955 req->rq_disk->disk_name);
1956 mq_rq = mq->mqrq_cur;
1960 if (reqs >= packed_nr)
1961 mmc_blk_packed_hdr_wrq_prep(mq->mqrq_cur,
1964 mmc_blk_rw_rq_prep(mq->mqrq_cur, card, 0, mq);
1965 areq = &mq->mqrq_cur->mmc_active;
1968 areq = mmc_start_req(card->host, areq, (int *) &status);
1970 if (status == MMC_BLK_NEW_REQUEST)
1971 mq->flags |= MMC_QUEUE_NEW_REQUEST;
1975 mq_rq = container_of(areq, struct mmc_queue_req, mmc_active);
1978 type = rq_data_dir(req) == READ ? MMC_BLK_READ : MMC_BLK_WRITE;
1979 mmc_queue_bounce_post(mq_rq);
1982 case MMC_BLK_SUCCESS:
1983 case MMC_BLK_PARTIAL:
1985 * A block was successfully transferred.
1987 mmc_blk_reset_success(md, type);
1989 if (mmc_packed_cmd(mq_rq->cmd_type)) {
1990 ret = mmc_blk_end_packed_req(mq_rq);
1993 ret = blk_end_request(req, 0,
1994 brq->data.bytes_xfered);
1998 * If the blk_end_request function returns non-zero even
1999 * though all data has been transferred and no errors
2000 * were returned by the host controller, it's a bug.
2002 if (status == MMC_BLK_SUCCESS && ret) {
2003 pr_err("%s BUG rq_tot %d d_xfer %d\n",
2004 __func__, blk_rq_bytes(req),
2005 brq->data.bytes_xfered);
2010 case MMC_BLK_CMD_ERR:
2011 ret = mmc_blk_cmd_err(md, card, brq, req, ret);
2012 if (mmc_blk_reset(md, card->host, type))
2018 retune_retry_done = brq->retune_retry_done;
2023 if (!mmc_blk_reset(md, card->host, type))
2026 case MMC_BLK_DATA_ERR: {
2029 err = mmc_blk_reset(md, card->host, type);
2032 if (err == -ENODEV ||
2033 mmc_packed_cmd(mq_rq->cmd_type))
2037 case MMC_BLK_ECC_ERR:
2038 if (brq->data.blocks > 1) {
2039 /* Redo read one sector at a time */
2040 pr_warn("%s: retrying using single block read\n",
2041 req->rq_disk->disk_name);
2046 * After an error, we redo I/O one sector at a
2047 * time, so we only reach here after trying to
2048 * read a single sector.
2050 ret = blk_end_request(req, -EIO,
2055 case MMC_BLK_NOMEDIUM:
2058 pr_err("%s: Unhandled return value (%d)",
2059 req->rq_disk->disk_name, status);
2064 if (mmc_packed_cmd(mq_rq->cmd_type)) {
2065 if (!mq_rq->packed->retries)
2067 mmc_blk_packed_hdr_wrq_prep(mq_rq, card, mq);
2068 mmc_start_req(card->host,
2069 &mq_rq->mmc_active, NULL);
2073 * In case of a incomplete request
2074 * prepare it again and resend.
2076 mmc_blk_rw_rq_prep(mq_rq, card,
2078 mmc_start_req(card->host,
2079 &mq_rq->mmc_active, NULL);
2081 mq_rq->brq.retune_retry_done = retune_retry_done;
2088 if (mmc_packed_cmd(mq_rq->cmd_type)) {
2089 mmc_blk_abort_packed_req(mq_rq);
2091 if (mmc_card_removed(card))
2092 req->cmd_flags |= REQ_QUIET;
2094 ret = blk_end_request(req, -EIO,
2095 blk_rq_cur_bytes(req));
2100 if (mmc_card_removed(card)) {
2101 rqc->cmd_flags |= REQ_QUIET;
2102 blk_end_request_all(rqc, -EIO);
2105 * If current request is packed, it needs to put back.
2107 if (mmc_packed_cmd(mq->mqrq_cur->cmd_type))
2108 mmc_blk_revert_packed_req(mq, mq->mqrq_cur);
2110 mmc_blk_rw_rq_prep(mq->mqrq_cur, card, 0, mq);
2111 mmc_start_req(card->host,
2112 &mq->mqrq_cur->mmc_active, NULL);
2119 static int mmc_blk_issue_rq(struct mmc_queue *mq, struct request *req)
2122 struct mmc_blk_data *md = mq->data;
2123 struct mmc_card *card = md->queue.card;
2124 struct mmc_host *host = card->host;
2125 unsigned long flags;
2126 unsigned int cmd_flags = req ? req->cmd_flags : 0;
2128 if (req && !mq->mqrq_prev->req)
2129 /* claim host only for the first request */
2132 ret = mmc_blk_part_switch(card, md);
2135 blk_end_request_all(req, -EIO);
2141 mq->flags &= ~MMC_QUEUE_NEW_REQUEST;
2142 if (cmd_flags & REQ_DISCARD) {
2143 /* complete ongoing async transfer before issuing discard */
2144 if (card->host->areq)
2145 mmc_blk_issue_rw_rq(mq, NULL);
2146 if (req->cmd_flags & REQ_SECURE)
2147 ret = mmc_blk_issue_secdiscard_rq(mq, req);
2149 ret = mmc_blk_issue_discard_rq(mq, req);
2150 } else if (cmd_flags & REQ_FLUSH) {
2151 /* complete ongoing async transfer before issuing flush */
2152 if (card->host->areq)
2153 mmc_blk_issue_rw_rq(mq, NULL);
2154 ret = mmc_blk_issue_flush(mq, req);
2156 if (!req && host->areq) {
2157 spin_lock_irqsave(&host->context_info.lock, flags);
2158 host->context_info.is_waiting_last_req = true;
2159 spin_unlock_irqrestore(&host->context_info.lock, flags);
2161 ret = mmc_blk_issue_rw_rq(mq, req);
2165 if ((!req && !(mq->flags & MMC_QUEUE_NEW_REQUEST)) ||
2166 (cmd_flags & MMC_REQ_SPECIAL_MASK))
2168 * Release host when there are no more requests
2169 * and after special request(discard, flush) is done.
2170 * In case sepecial request, there is no reentry to
2171 * the 'mmc_blk_issue_rq' with 'mqrq_prev->req'.
2177 static inline int mmc_blk_readonly(struct mmc_card *card)
2179 return mmc_card_readonly(card) ||
2180 !(card->csd.cmdclass & CCC_BLOCK_WRITE);
2183 static struct mmc_blk_data *mmc_blk_alloc_req(struct mmc_card *card,
2184 struct device *parent,
2187 const char *subname,
2190 struct mmc_blk_data *md;
2193 devidx = find_first_zero_bit(dev_use, max_devices);
2194 if (devidx >= max_devices)
2195 return ERR_PTR(-ENOSPC);
2196 __set_bit(devidx, dev_use);
2198 md = kzalloc(sizeof(struct mmc_blk_data), GFP_KERNEL);
2205 * !subname implies we are creating main mmc_blk_data that will be
2206 * associated with mmc_card with dev_set_drvdata. Due to device
2207 * partitions, devidx will not coincide with a per-physical card
2208 * index anymore so we keep track of a name index.
2211 md->name_idx = find_first_zero_bit(name_use, max_devices);
2212 __set_bit(md->name_idx, name_use);
2214 md->name_idx = ((struct mmc_blk_data *)
2215 dev_to_disk(parent)->private_data)->name_idx;
2217 md->area_type = area_type;
2220 * Set the read-only status based on the supported commands
2221 * and the write protect switch.
2223 md->read_only = mmc_blk_readonly(card);
2225 md->disk = alloc_disk(perdev_minors);
2226 if (md->disk == NULL) {
2231 spin_lock_init(&md->lock);
2232 INIT_LIST_HEAD(&md->part);
2235 ret = mmc_init_queue(&md->queue, card, &md->lock, subname);
2239 md->queue.issue_fn = mmc_blk_issue_rq;
2240 md->queue.data = md;
2242 md->disk->major = MMC_BLOCK_MAJOR;
2243 md->disk->first_minor = devidx * perdev_minors;
2244 md->disk->fops = &mmc_bdops;
2245 md->disk->private_data = md;
2246 md->disk->queue = md->queue.queue;
2247 md->disk->driverfs_dev = parent;
2248 set_disk_ro(md->disk, md->read_only || default_ro);
2249 md->disk->flags = GENHD_FL_EXT_DEVT;
2250 if (area_type & (MMC_BLK_DATA_AREA_RPMB | MMC_BLK_DATA_AREA_BOOT))
2251 md->disk->flags |= GENHD_FL_NO_PART_SCAN;
2254 * As discussed on lkml, GENHD_FL_REMOVABLE should:
2256 * - be set for removable media with permanent block devices
2257 * - be unset for removable block devices with permanent media
2259 * Since MMC block devices clearly fall under the second
2260 * case, we do not set GENHD_FL_REMOVABLE. Userspace
2261 * should use the block device creation/destruction hotplug
2262 * messages to tell when the card is present.
2265 snprintf(md->disk->disk_name, sizeof(md->disk->disk_name),
2266 "mmcblk%u%s", md->name_idx, subname ? subname : "");
2268 if (mmc_card_mmc(card))
2269 blk_queue_logical_block_size(md->queue.queue,
2270 card->ext_csd.data_sector_size);
2272 blk_queue_logical_block_size(md->queue.queue, 512);
2274 set_capacity(md->disk, size);
2276 if (mmc_host_cmd23(card->host)) {
2277 if (mmc_card_mmc(card) ||
2278 (mmc_card_sd(card) &&
2279 card->scr.cmds & SD_SCR_CMD23_SUPPORT))
2280 md->flags |= MMC_BLK_CMD23;
2283 if (mmc_card_mmc(card) &&
2284 md->flags & MMC_BLK_CMD23 &&
2285 ((card->ext_csd.rel_param & EXT_CSD_WR_REL_PARAM_EN) ||
2286 card->ext_csd.rel_sectors)) {
2287 md->flags |= MMC_BLK_REL_WR;
2288 blk_queue_flush(md->queue.queue, REQ_FLUSH | REQ_FUA);
2291 if (mmc_card_mmc(card) &&
2292 (area_type == MMC_BLK_DATA_AREA_MAIN) &&
2293 (md->flags & MMC_BLK_CMD23) &&
2294 card->ext_csd.packed_event_en) {
2295 if (!mmc_packed_init(&md->queue, card))
2296 md->flags |= MMC_BLK_PACKED_CMD;
2306 return ERR_PTR(ret);
2309 static struct mmc_blk_data *mmc_blk_alloc(struct mmc_card *card)
2313 if (!mmc_card_sd(card) && mmc_card_blockaddr(card)) {
2315 * The EXT_CSD sector count is in number or 512 byte
2318 size = card->ext_csd.sectors;
2321 * The CSD capacity field is in units of read_blkbits.
2322 * set_capacity takes units of 512 bytes.
2324 size = (typeof(sector_t))card->csd.capacity
2325 << (card->csd.read_blkbits - 9);
2328 return mmc_blk_alloc_req(card, &card->dev, size, false, NULL,
2329 MMC_BLK_DATA_AREA_MAIN);
2332 static int mmc_blk_alloc_part(struct mmc_card *card,
2333 struct mmc_blk_data *md,
2334 unsigned int part_type,
2337 const char *subname,
2341 struct mmc_blk_data *part_md;
2343 part_md = mmc_blk_alloc_req(card, disk_to_dev(md->disk), size, default_ro,
2344 subname, area_type);
2345 if (IS_ERR(part_md))
2346 return PTR_ERR(part_md);
2347 part_md->part_type = part_type;
2348 list_add(&part_md->part, &md->part);
2350 string_get_size((u64)get_capacity(part_md->disk), 512, STRING_UNITS_2,
2351 cap_str, sizeof(cap_str));
2352 pr_info("%s: %s %s partition %u %s\n",
2353 part_md->disk->disk_name, mmc_card_id(card),
2354 mmc_card_name(card), part_md->part_type, cap_str);
2358 /* MMC Physical partitions consist of two boot partitions and
2359 * up to four general purpose partitions.
2360 * For each partition enabled in EXT_CSD a block device will be allocatedi
2361 * to provide access to the partition.
2364 static int mmc_blk_alloc_parts(struct mmc_card *card, struct mmc_blk_data *md)
2368 if (!mmc_card_mmc(card))
2371 for (idx = 0; idx < card->nr_parts; idx++) {
2372 if (card->part[idx].size) {
2373 ret = mmc_blk_alloc_part(card, md,
2374 card->part[idx].part_cfg,
2375 card->part[idx].size >> 9,
2376 card->part[idx].force_ro,
2377 card->part[idx].name,
2378 card->part[idx].area_type);
2387 static void mmc_blk_remove_req(struct mmc_blk_data *md)
2389 struct mmc_card *card;
2393 * Flush remaining requests and free queues. It
2394 * is freeing the queue that stops new requests
2395 * from being accepted.
2397 card = md->queue.card;
2398 mmc_cleanup_queue(&md->queue);
2399 if (md->flags & MMC_BLK_PACKED_CMD)
2400 mmc_packed_clean(&md->queue);
2401 if (md->disk->flags & GENHD_FL_UP) {
2402 device_remove_file(disk_to_dev(md->disk), &md->force_ro);
2403 if ((md->area_type & MMC_BLK_DATA_AREA_BOOT) &&
2404 card->ext_csd.boot_ro_lockable)
2405 device_remove_file(disk_to_dev(md->disk),
2406 &md->power_ro_lock);
2408 del_gendisk(md->disk);
2414 static void mmc_blk_remove_parts(struct mmc_card *card,
2415 struct mmc_blk_data *md)
2417 struct list_head *pos, *q;
2418 struct mmc_blk_data *part_md;
2420 __clear_bit(md->name_idx, name_use);
2421 list_for_each_safe(pos, q, &md->part) {
2422 part_md = list_entry(pos, struct mmc_blk_data, part);
2424 mmc_blk_remove_req(part_md);
2428 static int mmc_add_disk(struct mmc_blk_data *md)
2431 struct mmc_card *card = md->queue.card;
2434 md->force_ro.show = force_ro_show;
2435 md->force_ro.store = force_ro_store;
2436 sysfs_attr_init(&md->force_ro.attr);
2437 md->force_ro.attr.name = "force_ro";
2438 md->force_ro.attr.mode = S_IRUGO | S_IWUSR;
2439 ret = device_create_file(disk_to_dev(md->disk), &md->force_ro);
2443 if ((md->area_type & MMC_BLK_DATA_AREA_BOOT) &&
2444 card->ext_csd.boot_ro_lockable) {
2447 if (card->ext_csd.boot_ro_lock & EXT_CSD_BOOT_WP_B_PWR_WP_DIS)
2450 mode = S_IRUGO | S_IWUSR;
2452 md->power_ro_lock.show = power_ro_lock_show;
2453 md->power_ro_lock.store = power_ro_lock_store;
2454 sysfs_attr_init(&md->power_ro_lock.attr);
2455 md->power_ro_lock.attr.mode = mode;
2456 md->power_ro_lock.attr.name =
2457 "ro_lock_until_next_power_on";
2458 ret = device_create_file(disk_to_dev(md->disk),
2459 &md->power_ro_lock);
2461 goto power_ro_lock_fail;
2466 device_remove_file(disk_to_dev(md->disk), &md->force_ro);
2468 del_gendisk(md->disk);
2473 #define CID_MANFID_SANDISK 0x2
2474 #define CID_MANFID_TOSHIBA 0x11
2475 #define CID_MANFID_MICRON 0x13
2476 #define CID_MANFID_SAMSUNG 0x15
2477 #define CID_MANFID_KINGSTON 0x70
2479 static const struct mmc_fixup blk_fixups[] =
2481 MMC_FIXUP("SEM02G", CID_MANFID_SANDISK, 0x100, add_quirk,
2482 MMC_QUIRK_INAND_CMD38),
2483 MMC_FIXUP("SEM04G", CID_MANFID_SANDISK, 0x100, add_quirk,
2484 MMC_QUIRK_INAND_CMD38),
2485 MMC_FIXUP("SEM08G", CID_MANFID_SANDISK, 0x100, add_quirk,
2486 MMC_QUIRK_INAND_CMD38),
2487 MMC_FIXUP("SEM16G", CID_MANFID_SANDISK, 0x100, add_quirk,
2488 MMC_QUIRK_INAND_CMD38),
2489 MMC_FIXUP("SEM32G", CID_MANFID_SANDISK, 0x100, add_quirk,
2490 MMC_QUIRK_INAND_CMD38),
2493 * Some MMC cards experience performance degradation with CMD23
2494 * instead of CMD12-bounded multiblock transfers. For now we'll
2495 * black list what's bad...
2496 * - Certain Toshiba cards.
2498 * N.B. This doesn't affect SD cards.
2500 MMC_FIXUP("SDMB-32", CID_MANFID_SANDISK, CID_OEMID_ANY, add_quirk_mmc,
2501 MMC_QUIRK_BLK_NO_CMD23),
2502 MMC_FIXUP("SDM032", CID_MANFID_SANDISK, CID_OEMID_ANY, add_quirk_mmc,
2503 MMC_QUIRK_BLK_NO_CMD23),
2504 MMC_FIXUP("MMC08G", CID_MANFID_TOSHIBA, CID_OEMID_ANY, add_quirk_mmc,
2505 MMC_QUIRK_BLK_NO_CMD23),
2506 MMC_FIXUP("MMC16G", CID_MANFID_TOSHIBA, CID_OEMID_ANY, add_quirk_mmc,
2507 MMC_QUIRK_BLK_NO_CMD23),
2508 MMC_FIXUP("MMC32G", CID_MANFID_TOSHIBA, CID_OEMID_ANY, add_quirk_mmc,
2509 MMC_QUIRK_BLK_NO_CMD23),
2512 * Some Micron MMC cards needs longer data read timeout than
2515 MMC_FIXUP(CID_NAME_ANY, CID_MANFID_MICRON, 0x200, add_quirk_mmc,
2516 MMC_QUIRK_LONG_READ_TIME),
2519 * On these Samsung MoviNAND parts, performing secure erase or
2520 * secure trim can result in unrecoverable corruption due to a
2523 MMC_FIXUP("M8G2FA", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2524 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2525 MMC_FIXUP("MAG4FA", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2526 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2527 MMC_FIXUP("MBG8FA", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2528 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2529 MMC_FIXUP("MCGAFA", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2530 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2531 MMC_FIXUP("VAL00M", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2532 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2533 MMC_FIXUP("VYL00M", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2534 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2535 MMC_FIXUP("KYL00M", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2536 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2537 MMC_FIXUP("VZL00M", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2538 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2541 * On Some Kingston eMMCs, performing trim can result in
2542 * unrecoverable data conrruption occasionally due to a firmware bug.
2544 MMC_FIXUP("V10008", CID_MANFID_KINGSTON, CID_OEMID_ANY, add_quirk_mmc,
2545 MMC_QUIRK_TRIM_BROKEN),
2546 MMC_FIXUP("V10016", CID_MANFID_KINGSTON, CID_OEMID_ANY, add_quirk_mmc,
2547 MMC_QUIRK_TRIM_BROKEN),
2552 static int mmc_blk_probe(struct mmc_card *card)
2554 struct mmc_blk_data *md, *part_md;
2558 * Check that the card supports the command class(es) we need.
2560 if (!(card->csd.cmdclass & CCC_BLOCK_READ))
2563 mmc_fixup_device(card, blk_fixups);
2565 md = mmc_blk_alloc(card);
2569 string_get_size((u64)get_capacity(md->disk), 512, STRING_UNITS_2,
2570 cap_str, sizeof(cap_str));
2571 pr_info("%s: %s %s %s %s\n",
2572 md->disk->disk_name, mmc_card_id(card), mmc_card_name(card),
2573 cap_str, md->read_only ? "(ro)" : "");
2575 if (mmc_blk_alloc_parts(card, md))
2578 dev_set_drvdata(&card->dev, md);
2580 if (mmc_add_disk(md))
2583 list_for_each_entry(part_md, &md->part, part) {
2584 if (mmc_add_disk(part_md))
2588 pm_runtime_set_autosuspend_delay(&card->dev, 3000);
2589 pm_runtime_use_autosuspend(&card->dev);
2592 * Don't enable runtime PM for SD-combo cards here. Leave that
2593 * decision to be taken during the SDIO init sequence instead.
2595 if (card->type != MMC_TYPE_SD_COMBO) {
2596 pm_runtime_set_active(&card->dev);
2597 pm_runtime_enable(&card->dev);
2603 mmc_blk_remove_parts(card, md);
2604 mmc_blk_remove_req(md);
2608 static void mmc_blk_remove(struct mmc_card *card)
2610 struct mmc_blk_data *md = dev_get_drvdata(&card->dev);
2612 mmc_blk_remove_parts(card, md);
2613 pm_runtime_get_sync(&card->dev);
2614 mmc_claim_host(card->host);
2615 mmc_blk_part_switch(card, md);
2616 mmc_release_host(card->host);
2617 if (card->type != MMC_TYPE_SD_COMBO)
2618 pm_runtime_disable(&card->dev);
2619 pm_runtime_put_noidle(&card->dev);
2620 mmc_blk_remove_req(md);
2621 dev_set_drvdata(&card->dev, NULL);
2624 static int _mmc_blk_suspend(struct mmc_card *card)
2626 struct mmc_blk_data *part_md;
2627 struct mmc_blk_data *md = dev_get_drvdata(&card->dev);
2630 mmc_queue_suspend(&md->queue);
2631 list_for_each_entry(part_md, &md->part, part) {
2632 mmc_queue_suspend(&part_md->queue);
2638 static void mmc_blk_shutdown(struct mmc_card *card)
2640 _mmc_blk_suspend(card);
2643 #ifdef CONFIG_PM_SLEEP
2644 static int mmc_blk_suspend(struct device *dev)
2646 struct mmc_card *card = mmc_dev_to_card(dev);
2648 return _mmc_blk_suspend(card);
2651 static int mmc_blk_resume(struct device *dev)
2653 struct mmc_blk_data *part_md;
2654 struct mmc_blk_data *md = dev_get_drvdata(dev);
2658 * Resume involves the card going into idle state,
2659 * so current partition is always the main one.
2661 md->part_curr = md->part_type;
2662 mmc_queue_resume(&md->queue);
2663 list_for_each_entry(part_md, &md->part, part) {
2664 mmc_queue_resume(&part_md->queue);
2671 static SIMPLE_DEV_PM_OPS(mmc_blk_pm_ops, mmc_blk_suspend, mmc_blk_resume);
2673 static struct mmc_driver mmc_driver = {
2676 .pm = &mmc_blk_pm_ops,
2678 .probe = mmc_blk_probe,
2679 .remove = mmc_blk_remove,
2680 .shutdown = mmc_blk_shutdown,
2683 static int __init mmc_blk_init(void)
2687 if (perdev_minors != CONFIG_MMC_BLOCK_MINORS)
2688 pr_info("mmcblk: using %d minors per device\n", perdev_minors);
2690 max_devices = min(MAX_DEVICES, (1 << MINORBITS) / perdev_minors);
2692 res = register_blkdev(MMC_BLOCK_MAJOR, "mmc");
2696 res = mmc_register_driver(&mmc_driver);
2702 unregister_blkdev(MMC_BLOCK_MAJOR, "mmc");
2707 static void __exit mmc_blk_exit(void)
2709 mmc_unregister_driver(&mmc_driver);
2710 unregister_blkdev(MMC_BLOCK_MAJOR, "mmc");
2713 module_init(mmc_blk_init);
2714 module_exit(mmc_blk_exit);
2716 MODULE_LICENSE("GPL");
2717 MODULE_DESCRIPTION("Multimedia Card (MMC) block device driver");