2 * Block driver for media (i.e., flash cards)
4 * Copyright 2002 Hewlett-Packard Company
5 * Copyright 2005-2008 Pierre Ossman
7 * Use consistent with the GNU GPL is permitted,
8 * provided that this copyright notice is
9 * preserved in its entirety in all copies and derived works.
11 * HEWLETT-PACKARD COMPANY MAKES NO WARRANTIES, EXPRESSED OR IMPLIED,
12 * AS TO THE USEFULNESS OR CORRECTNESS OF THIS CODE OR ITS
13 * FITNESS FOR ANY PARTICULAR PURPOSE.
15 * Many thanks to Alessandro Rubini and Jonathan Corbet!
17 * Author: Andrew Christian
20 #include <linux/moduleparam.h>
21 #include <linux/module.h>
22 #include <linux/init.h>
24 #include <linux/kernel.h>
26 #include <linux/slab.h>
27 #include <linux/errno.h>
28 #include <linux/hdreg.h>
29 #include <linux/kdev_t.h>
30 #include <linux/blkdev.h>
31 #include <linux/mutex.h>
32 #include <linux/scatterlist.h>
33 #include <linux/string_helpers.h>
34 #include <linux/delay.h>
35 #include <linux/capability.h>
36 #include <linux/compat.h>
37 #include <linux/pm_runtime.h>
39 #include <linux/mmc/ioctl.h>
40 #include <linux/mmc/card.h>
41 #include <linux/mmc/host.h>
42 #include <linux/mmc/mmc.h>
43 #include <linux/mmc/sd.h>
45 #include <asm/uaccess.h>
49 MODULE_ALIAS("mmc:block");
50 #ifdef MODULE_PARAM_PREFIX
51 #undef MODULE_PARAM_PREFIX
53 #define MODULE_PARAM_PREFIX "mmcblk."
55 #define INAND_CMD38_ARG_EXT_CSD 113
56 #define INAND_CMD38_ARG_ERASE 0x00
57 #define INAND_CMD38_ARG_TRIM 0x01
58 #define INAND_CMD38_ARG_SECERASE 0x80
59 #define INAND_CMD38_ARG_SECTRIM1 0x81
60 #define INAND_CMD38_ARG_SECTRIM2 0x88
61 #define MMC_BLK_TIMEOUT_MS (10 * 60 * 1000) /* 10 minute timeout */
62 #define MMC_SANITIZE_REQ_TIMEOUT 240000
63 #define MMC_EXTRACT_INDEX_FROM_ARG(x) ((x & 0x00FF0000) >> 16)
65 #define mmc_req_rel_wr(req) (((req->cmd_flags & REQ_FUA) || \
66 (req->cmd_flags & REQ_META)) && \
67 (rq_data_dir(req) == WRITE))
68 #define PACKED_CMD_VER 0x01
69 #define PACKED_CMD_WR 0x02
71 static DEFINE_MUTEX(block_mutex);
74 * The defaults come from config options but can be overriden by module
77 static int perdev_minors = CONFIG_MMC_BLOCK_MINORS;
80 * We've only got one major, so number of mmcblk devices is
81 * limited to (1 << 20) / number of minors per device. It is also
82 * currently limited by the size of the static bitmaps below.
84 static int max_devices;
86 #define MAX_DEVICES 256
88 /* TODO: Replace these with struct ida */
89 static DECLARE_BITMAP(dev_use, MAX_DEVICES);
90 static DECLARE_BITMAP(name_use, MAX_DEVICES);
93 * There is one mmc_blk_data per slot.
98 struct mmc_queue queue;
99 struct list_head part;
102 #define MMC_BLK_CMD23 (1 << 0) /* Can do SET_BLOCK_COUNT for multiblock */
103 #define MMC_BLK_REL_WR (1 << 1) /* MMC Reliable write support */
104 #define MMC_BLK_PACKED_CMD (1 << 2) /* MMC packed command support */
107 unsigned int read_only;
108 unsigned int part_type;
109 unsigned int name_idx;
110 unsigned int reset_done;
111 #define MMC_BLK_READ BIT(0)
112 #define MMC_BLK_WRITE BIT(1)
113 #define MMC_BLK_DISCARD BIT(2)
114 #define MMC_BLK_SECDISCARD BIT(3)
117 * Only set in main mmc_blk_data associated
118 * with mmc_card with dev_set_drvdata, and keeps
119 * track of the current selected device partition.
121 unsigned int part_curr;
122 struct device_attribute force_ro;
123 struct device_attribute power_ro_lock;
127 static DEFINE_MUTEX(open_lock);
130 MMC_PACKED_NR_IDX = -1,
132 MMC_PACKED_NR_SINGLE,
135 module_param(perdev_minors, int, 0444);
136 MODULE_PARM_DESC(perdev_minors, "Minors numbers to allocate per device");
138 static inline int mmc_blk_part_switch(struct mmc_card *card,
139 struct mmc_blk_data *md);
140 static int get_card_status(struct mmc_card *card, u32 *status, int retries);
142 static inline void mmc_blk_clear_packed(struct mmc_queue_req *mqrq)
144 struct mmc_packed *packed = mqrq->packed;
148 mqrq->cmd_type = MMC_PACKED_NONE;
149 packed->nr_entries = MMC_PACKED_NR_ZERO;
150 packed->idx_failure = MMC_PACKED_NR_IDX;
155 static struct mmc_blk_data *mmc_blk_get(struct gendisk *disk)
157 struct mmc_blk_data *md;
159 mutex_lock(&open_lock);
160 md = disk->private_data;
161 if (md && md->usage == 0)
165 mutex_unlock(&open_lock);
170 static inline int mmc_get_devidx(struct gendisk *disk)
172 int devmaj = MAJOR(disk_devt(disk));
173 int devidx = MINOR(disk_devt(disk)) / perdev_minors;
176 devidx = disk->first_minor / perdev_minors;
180 static void mmc_blk_put(struct mmc_blk_data *md)
182 mutex_lock(&open_lock);
184 if (md->usage == 0) {
185 int devidx = mmc_get_devidx(md->disk);
186 blk_cleanup_queue(md->queue.queue);
188 __clear_bit(devidx, dev_use);
193 mutex_unlock(&open_lock);
196 static ssize_t power_ro_lock_show(struct device *dev,
197 struct device_attribute *attr, char *buf)
200 struct mmc_blk_data *md = mmc_blk_get(dev_to_disk(dev));
201 struct mmc_card *card = md->queue.card;
204 if (card->ext_csd.boot_ro_lock & EXT_CSD_BOOT_WP_B_PERM_WP_EN)
206 else if (card->ext_csd.boot_ro_lock & EXT_CSD_BOOT_WP_B_PWR_WP_EN)
209 ret = snprintf(buf, PAGE_SIZE, "%d\n", locked);
216 static ssize_t power_ro_lock_store(struct device *dev,
217 struct device_attribute *attr, const char *buf, size_t count)
220 struct mmc_blk_data *md, *part_md;
221 struct mmc_card *card;
224 if (kstrtoul(buf, 0, &set))
230 md = mmc_blk_get(dev_to_disk(dev));
231 card = md->queue.card;
235 ret = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_BOOT_WP,
236 card->ext_csd.boot_ro_lock |
237 EXT_CSD_BOOT_WP_B_PWR_WP_EN,
238 card->ext_csd.part_time);
240 pr_err("%s: Locking boot partition ro until next power on failed: %d\n", md->disk->disk_name, ret);
242 card->ext_csd.boot_ro_lock |= EXT_CSD_BOOT_WP_B_PWR_WP_EN;
247 pr_info("%s: Locking boot partition ro until next power on\n",
248 md->disk->disk_name);
249 set_disk_ro(md->disk, 1);
251 list_for_each_entry(part_md, &md->part, part)
252 if (part_md->area_type == MMC_BLK_DATA_AREA_BOOT) {
253 pr_info("%s: Locking boot partition ro until next power on\n", part_md->disk->disk_name);
254 set_disk_ro(part_md->disk, 1);
262 static ssize_t force_ro_show(struct device *dev, struct device_attribute *attr,
266 struct mmc_blk_data *md = mmc_blk_get(dev_to_disk(dev));
268 ret = snprintf(buf, PAGE_SIZE, "%d\n",
269 get_disk_ro(dev_to_disk(dev)) ^
275 static ssize_t force_ro_store(struct device *dev, struct device_attribute *attr,
276 const char *buf, size_t count)
280 struct mmc_blk_data *md = mmc_blk_get(dev_to_disk(dev));
281 unsigned long set = simple_strtoul(buf, &end, 0);
287 set_disk_ro(dev_to_disk(dev), set || md->read_only);
294 static int mmc_blk_open(struct block_device *bdev, fmode_t mode)
296 struct mmc_blk_data *md = mmc_blk_get(bdev->bd_disk);
299 mutex_lock(&block_mutex);
302 check_disk_change(bdev);
305 if ((mode & FMODE_WRITE) && md->read_only) {
310 mutex_unlock(&block_mutex);
315 static void mmc_blk_release(struct gendisk *disk, fmode_t mode)
317 struct mmc_blk_data *md = disk->private_data;
319 mutex_lock(&block_mutex);
321 mutex_unlock(&block_mutex);
325 mmc_blk_getgeo(struct block_device *bdev, struct hd_geometry *geo)
327 geo->cylinders = get_capacity(bdev->bd_disk) / (4 * 16);
333 struct mmc_blk_ioc_data {
334 struct mmc_ioc_cmd ic;
339 static struct mmc_blk_ioc_data *mmc_blk_ioctl_copy_from_user(
340 struct mmc_ioc_cmd __user *user)
342 struct mmc_blk_ioc_data *idata;
345 idata = kzalloc(sizeof(*idata), GFP_KERNEL);
351 if (copy_from_user(&idata->ic, user, sizeof(idata->ic))) {
356 idata->buf_bytes = (u64) idata->ic.blksz * idata->ic.blocks;
357 if (idata->buf_bytes > MMC_IOC_MAX_BYTES) {
362 if (!idata->buf_bytes)
365 idata->buf = kzalloc(idata->buf_bytes, GFP_KERNEL);
371 if (copy_from_user(idata->buf, (void __user *)(unsigned long)
372 idata->ic.data_ptr, idata->buf_bytes)) {
387 static int ioctl_rpmb_card_status_poll(struct mmc_card *card, u32 *status,
393 if (!status || !retries_max)
397 err = get_card_status(card, status, 5);
401 if (!R1_STATUS(*status) &&
402 (R1_CURRENT_STATE(*status) != R1_STATE_PRG))
403 break; /* RPMB programming operation complete */
406 * Rechedule to give the MMC device a chance to continue
407 * processing the previous command without being polled too
410 usleep_range(1000, 5000);
411 } while (++retry_count < retries_max);
413 if (retry_count == retries_max)
419 static int ioctl_do_sanitize(struct mmc_card *card)
423 if (!mmc_can_sanitize(card)) {
424 pr_warn("%s: %s - SANITIZE is not supported\n",
425 mmc_hostname(card->host), __func__);
430 pr_debug("%s: %s - SANITIZE IN PROGRESS...\n",
431 mmc_hostname(card->host), __func__);
433 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
434 EXT_CSD_SANITIZE_START, 1,
435 MMC_SANITIZE_REQ_TIMEOUT);
438 pr_err("%s: %s - EXT_CSD_SANITIZE_START failed. err=%d\n",
439 mmc_hostname(card->host), __func__, err);
441 pr_debug("%s: %s - SANITIZE COMPLETED\n", mmc_hostname(card->host),
447 static int mmc_blk_ioctl_cmd(struct block_device *bdev,
448 struct mmc_ioc_cmd __user *ic_ptr)
450 struct mmc_blk_ioc_data *idata;
451 struct mmc_blk_data *md;
452 struct mmc_card *card;
453 struct mmc_command cmd = {0};
454 struct mmc_data data = {0};
455 struct mmc_request mrq = {NULL};
456 struct scatterlist sg;
462 * The caller must have CAP_SYS_RAWIO, and must be calling this on the
463 * whole block device, not on a partition. This prevents overspray
464 * between sibling partitions.
466 if ((!capable(CAP_SYS_RAWIO)) || (bdev != bdev->bd_contains))
469 idata = mmc_blk_ioctl_copy_from_user(ic_ptr);
471 return PTR_ERR(idata);
473 md = mmc_blk_get(bdev->bd_disk);
479 if (md->area_type & MMC_BLK_DATA_AREA_RPMB)
482 card = md->queue.card;
488 cmd.opcode = idata->ic.opcode;
489 cmd.arg = idata->ic.arg;
490 cmd.flags = idata->ic.flags;
492 if (idata->buf_bytes) {
495 data.blksz = idata->ic.blksz;
496 data.blocks = idata->ic.blocks;
498 sg_init_one(data.sg, idata->buf, idata->buf_bytes);
500 if (idata->ic.write_flag)
501 data.flags = MMC_DATA_WRITE;
503 data.flags = MMC_DATA_READ;
505 /* data.flags must already be set before doing this. */
506 mmc_set_data_timeout(&data, card);
508 /* Allow overriding the timeout_ns for empirical tuning. */
509 if (idata->ic.data_timeout_ns)
510 data.timeout_ns = idata->ic.data_timeout_ns;
512 if ((cmd.flags & MMC_RSP_R1B) == MMC_RSP_R1B) {
514 * Pretend this is a data transfer and rely on the
515 * host driver to compute timeout. When all host
516 * drivers support cmd.cmd_timeout for R1B, this
520 * cmd.cmd_timeout = idata->ic.cmd_timeout_ms;
522 data.timeout_ns = idata->ic.cmd_timeout_ms * 1000000;
532 err = mmc_blk_part_switch(card, md);
536 if (idata->ic.is_acmd) {
537 err = mmc_app_cmd(card->host, card);
543 err = mmc_set_blockcount(card, data.blocks,
544 idata->ic.write_flag & (1 << 31));
549 if ((MMC_EXTRACT_INDEX_FROM_ARG(cmd.arg) == EXT_CSD_SANITIZE_START) &&
550 (cmd.opcode == MMC_SWITCH)) {
551 err = ioctl_do_sanitize(card);
554 pr_err("%s: ioctl_do_sanitize() failed. err = %d",
560 mmc_wait_for_req(card->host, &mrq);
563 dev_err(mmc_dev(card->host), "%s: cmd error %d\n",
564 __func__, cmd.error);
569 dev_err(mmc_dev(card->host), "%s: data error %d\n",
570 __func__, data.error);
576 * According to the SD specs, some commands require a delay after
577 * issuing the command.
579 if (idata->ic.postsleep_min_us)
580 usleep_range(idata->ic.postsleep_min_us, idata->ic.postsleep_max_us);
582 if (copy_to_user(&(ic_ptr->response), cmd.resp, sizeof(cmd.resp))) {
587 if (!idata->ic.write_flag) {
588 if (copy_to_user((void __user *)(unsigned long) idata->ic.data_ptr,
589 idata->buf, idata->buf_bytes)) {
597 * Ensure RPMB command has completed by polling CMD13
600 err = ioctl_rpmb_card_status_poll(card, &status, 5);
602 dev_err(mmc_dev(card->host),
603 "%s: Card Status=0x%08X, error %d\n",
604 __func__, status, err);
618 static int mmc_blk_ioctl(struct block_device *bdev, fmode_t mode,
619 unsigned int cmd, unsigned long arg)
622 if (cmd == MMC_IOC_CMD)
623 ret = mmc_blk_ioctl_cmd(bdev, (struct mmc_ioc_cmd __user *)arg);
628 static int mmc_blk_compat_ioctl(struct block_device *bdev, fmode_t mode,
629 unsigned int cmd, unsigned long arg)
631 return mmc_blk_ioctl(bdev, mode, cmd, (unsigned long) compat_ptr(arg));
635 static const struct block_device_operations mmc_bdops = {
636 .open = mmc_blk_open,
637 .release = mmc_blk_release,
638 .getgeo = mmc_blk_getgeo,
639 .owner = THIS_MODULE,
640 .ioctl = mmc_blk_ioctl,
642 .compat_ioctl = mmc_blk_compat_ioctl,
646 static inline int mmc_blk_part_switch(struct mmc_card *card,
647 struct mmc_blk_data *md)
650 struct mmc_blk_data *main_md = dev_get_drvdata(&card->dev);
652 if (main_md->part_curr == md->part_type)
655 if (mmc_card_mmc(card)) {
656 u8 part_config = card->ext_csd.part_config;
658 part_config &= ~EXT_CSD_PART_CONFIG_ACC_MASK;
659 part_config |= md->part_type;
661 ret = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
662 EXT_CSD_PART_CONFIG, part_config,
663 card->ext_csd.part_time);
667 card->ext_csd.part_config = part_config;
670 main_md->part_curr = md->part_type;
674 static u32 mmc_sd_num_wr_blocks(struct mmc_card *card)
680 struct mmc_request mrq = {NULL};
681 struct mmc_command cmd = {0};
682 struct mmc_data data = {0};
684 struct scatterlist sg;
686 cmd.opcode = MMC_APP_CMD;
687 cmd.arg = card->rca << 16;
688 cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC;
690 err = mmc_wait_for_cmd(card->host, &cmd, 0);
693 if (!mmc_host_is_spi(card->host) && !(cmd.resp[0] & R1_APP_CMD))
696 memset(&cmd, 0, sizeof(struct mmc_command));
698 cmd.opcode = SD_APP_SEND_NUM_WR_BLKS;
700 cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC;
704 data.flags = MMC_DATA_READ;
707 mmc_set_data_timeout(&data, card);
712 blocks = kmalloc(4, GFP_KERNEL);
716 sg_init_one(&sg, blocks, 4);
718 mmc_wait_for_req(card->host, &mrq);
720 result = ntohl(*blocks);
723 if (cmd.error || data.error)
729 static int get_card_status(struct mmc_card *card, u32 *status, int retries)
731 struct mmc_command cmd = {0};
734 cmd.opcode = MMC_SEND_STATUS;
735 if (!mmc_host_is_spi(card->host))
736 cmd.arg = card->rca << 16;
737 cmd.flags = MMC_RSP_SPI_R2 | MMC_RSP_R1 | MMC_CMD_AC;
738 err = mmc_wait_for_cmd(card->host, &cmd, retries);
740 *status = cmd.resp[0];
744 static int card_busy_detect(struct mmc_card *card, unsigned int timeout_ms,
745 bool hw_busy_detect, struct request *req, int *gen_err)
747 unsigned long timeout = jiffies + msecs_to_jiffies(timeout_ms);
752 err = get_card_status(card, &status, 5);
754 pr_err("%s: error %d requesting status\n",
755 req->rq_disk->disk_name, err);
759 if (status & R1_ERROR) {
760 pr_err("%s: %s: error sending status cmd, status %#x\n",
761 req->rq_disk->disk_name, __func__, status);
765 /* We may rely on the host hw to handle busy detection.*/
766 if ((card->host->caps & MMC_CAP_WAIT_WHILE_BUSY) &&
771 * Timeout if the device never becomes ready for data and never
772 * leaves the program state.
774 if (time_after(jiffies, timeout)) {
775 pr_err("%s: Card stuck in programming state! %s %s\n",
776 mmc_hostname(card->host),
777 req->rq_disk->disk_name, __func__);
782 * Some cards mishandle the status bits,
783 * so make sure to check both the busy
784 * indication and the card state.
786 } while (!(status & R1_READY_FOR_DATA) ||
787 (R1_CURRENT_STATE(status) == R1_STATE_PRG));
792 static int send_stop(struct mmc_card *card, unsigned int timeout_ms,
793 struct request *req, int *gen_err, u32 *stop_status)
795 struct mmc_host *host = card->host;
796 struct mmc_command cmd = {0};
798 bool use_r1b_resp = rq_data_dir(req) == WRITE;
801 * Normally we use R1B responses for WRITE, but in cases where the host
802 * has specified a max_busy_timeout we need to validate it. A failure
803 * means we need to prevent the host from doing hw busy detection, which
804 * is done by converting to a R1 response instead.
806 if (host->max_busy_timeout && (timeout_ms > host->max_busy_timeout))
807 use_r1b_resp = false;
809 cmd.opcode = MMC_STOP_TRANSMISSION;
811 cmd.flags = MMC_RSP_SPI_R1B | MMC_RSP_R1B | MMC_CMD_AC;
812 cmd.busy_timeout = timeout_ms;
814 cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC;
817 err = mmc_wait_for_cmd(host, &cmd, 5);
821 *stop_status = cmd.resp[0];
823 /* No need to check card status in case of READ. */
824 if (rq_data_dir(req) == READ)
827 if (!mmc_host_is_spi(host) &&
828 (*stop_status & R1_ERROR)) {
829 pr_err("%s: %s: general error sending stop command, resp %#x\n",
830 req->rq_disk->disk_name, __func__, *stop_status);
834 return card_busy_detect(card, timeout_ms, use_r1b_resp, req, gen_err);
837 #define ERR_NOMEDIUM 3
840 #define ERR_CONTINUE 0
842 static int mmc_blk_cmd_error(struct request *req, const char *name, int error,
843 bool status_valid, u32 status)
847 /* response crc error, retry the r/w cmd */
848 pr_err("%s: %s sending %s command, card status %#x\n",
849 req->rq_disk->disk_name, "response CRC error",
854 pr_err("%s: %s sending %s command, card status %#x\n",
855 req->rq_disk->disk_name, "timed out", name, status);
857 /* If the status cmd initially failed, retry the r/w cmd */
862 * If it was a r/w cmd crc error, or illegal command
863 * (eg, issued in wrong state) then retry - we should
864 * have corrected the state problem above.
866 if (status & (R1_COM_CRC_ERROR | R1_ILLEGAL_COMMAND))
869 /* Otherwise abort the command */
873 /* We don't understand the error code the driver gave us */
874 pr_err("%s: unknown error %d sending read/write command, card status %#x\n",
875 req->rq_disk->disk_name, error, status);
881 * Initial r/w and stop cmd error recovery.
882 * We don't know whether the card received the r/w cmd or not, so try to
883 * restore things back to a sane state. Essentially, we do this as follows:
884 * - Obtain card status. If the first attempt to obtain card status fails,
885 * the status word will reflect the failed status cmd, not the failed
886 * r/w cmd. If we fail to obtain card status, it suggests we can no
887 * longer communicate with the card.
888 * - Check the card state. If the card received the cmd but there was a
889 * transient problem with the response, it might still be in a data transfer
890 * mode. Try to send it a stop command. If this fails, we can't recover.
891 * - If the r/w cmd failed due to a response CRC error, it was probably
892 * transient, so retry the cmd.
893 * - If the r/w cmd timed out, but we didn't get the r/w cmd status, retry.
894 * - If the r/w cmd timed out, and the r/w cmd failed due to CRC error or
895 * illegal cmd, retry.
896 * Otherwise we don't understand what happened, so abort.
898 static int mmc_blk_cmd_recovery(struct mmc_card *card, struct request *req,
899 struct mmc_blk_request *brq, int *ecc_err, int *gen_err)
901 bool prev_cmd_status_valid = true;
902 u32 status, stop_status = 0;
905 if (mmc_card_removed(card))
909 * Try to get card status which indicates both the card state
910 * and why there was no response. If the first attempt fails,
911 * we can't be sure the returned status is for the r/w command.
913 for (retry = 2; retry >= 0; retry--) {
914 err = get_card_status(card, &status, 0);
918 prev_cmd_status_valid = false;
919 pr_err("%s: error %d sending status command, %sing\n",
920 req->rq_disk->disk_name, err, retry ? "retry" : "abort");
923 /* We couldn't get a response from the card. Give up. */
925 /* Check if the card is removed */
926 if (mmc_detect_card_removed(card->host))
931 /* Flag ECC errors */
932 if ((status & R1_CARD_ECC_FAILED) ||
933 (brq->stop.resp[0] & R1_CARD_ECC_FAILED) ||
934 (brq->cmd.resp[0] & R1_CARD_ECC_FAILED))
937 /* Flag General errors */
938 if (!mmc_host_is_spi(card->host) && rq_data_dir(req) != READ)
939 if ((status & R1_ERROR) ||
940 (brq->stop.resp[0] & R1_ERROR)) {
941 pr_err("%s: %s: general error sending stop or status command, stop cmd response %#x, card status %#x\n",
942 req->rq_disk->disk_name, __func__,
943 brq->stop.resp[0], status);
948 * Check the current card state. If it is in some data transfer
949 * mode, tell it to stop (and hopefully transition back to TRAN.)
951 if (R1_CURRENT_STATE(status) == R1_STATE_DATA ||
952 R1_CURRENT_STATE(status) == R1_STATE_RCV) {
953 err = send_stop(card,
954 DIV_ROUND_UP(brq->data.timeout_ns, 1000000),
955 req, gen_err, &stop_status);
957 pr_err("%s: error %d sending stop command\n",
958 req->rq_disk->disk_name, err);
960 * If the stop cmd also timed out, the card is probably
961 * not present, so abort. Other errors are bad news too.
966 if (stop_status & R1_CARD_ECC_FAILED)
970 /* Check for set block count errors */
972 return mmc_blk_cmd_error(req, "SET_BLOCK_COUNT", brq->sbc.error,
973 prev_cmd_status_valid, status);
975 /* Check for r/w command errors */
977 return mmc_blk_cmd_error(req, "r/w cmd", brq->cmd.error,
978 prev_cmd_status_valid, status);
981 if (!brq->stop.error)
984 /* Now for stop errors. These aren't fatal to the transfer. */
985 pr_info("%s: error %d sending stop command, original cmd response %#x, card status %#x\n",
986 req->rq_disk->disk_name, brq->stop.error,
987 brq->cmd.resp[0], status);
990 * Subsitute in our own stop status as this will give the error
991 * state which happened during the execution of the r/w command.
994 brq->stop.resp[0] = stop_status;
1000 static int mmc_blk_reset(struct mmc_blk_data *md, struct mmc_host *host,
1005 if (md->reset_done & type)
1008 md->reset_done |= type;
1009 err = mmc_hw_reset(host);
1010 /* Ensure we switch back to the correct partition */
1011 if (err != -EOPNOTSUPP) {
1012 struct mmc_blk_data *main_md =
1013 dev_get_drvdata(&host->card->dev);
1016 main_md->part_curr = main_md->part_type;
1017 part_err = mmc_blk_part_switch(host->card, md);
1020 * We have failed to get back into the correct
1021 * partition, so we need to abort the whole request.
1029 static inline void mmc_blk_reset_success(struct mmc_blk_data *md, int type)
1031 md->reset_done &= ~type;
1034 int mmc_access_rpmb(struct mmc_queue *mq)
1036 struct mmc_blk_data *md = mq->data;
1038 * If this is a RPMB partition access, return ture
1040 if (md && md->part_type == EXT_CSD_PART_CONFIG_ACC_RPMB)
1046 static int mmc_blk_issue_discard_rq(struct mmc_queue *mq, struct request *req)
1048 struct mmc_blk_data *md = mq->data;
1049 struct mmc_card *card = md->queue.card;
1050 unsigned int from, nr, arg;
1051 int err = 0, type = MMC_BLK_DISCARD;
1053 if (!mmc_can_erase(card)) {
1058 from = blk_rq_pos(req);
1059 nr = blk_rq_sectors(req);
1061 if (mmc_can_discard(card))
1062 arg = MMC_DISCARD_ARG;
1063 else if (mmc_can_trim(card))
1066 arg = MMC_ERASE_ARG;
1068 if (card->quirks & MMC_QUIRK_INAND_CMD38) {
1069 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1070 INAND_CMD38_ARG_EXT_CSD,
1071 arg == MMC_TRIM_ARG ?
1072 INAND_CMD38_ARG_TRIM :
1073 INAND_CMD38_ARG_ERASE,
1078 err = mmc_erase(card, from, nr, arg);
1080 if (err == -EIO && !mmc_blk_reset(md, card->host, type))
1083 mmc_blk_reset_success(md, type);
1084 blk_end_request(req, err, blk_rq_bytes(req));
1089 static int mmc_blk_issue_secdiscard_rq(struct mmc_queue *mq,
1090 struct request *req)
1092 struct mmc_blk_data *md = mq->data;
1093 struct mmc_card *card = md->queue.card;
1094 unsigned int from, nr, arg;
1095 int err = 0, type = MMC_BLK_SECDISCARD;
1097 if (!(mmc_can_secure_erase_trim(card))) {
1102 from = blk_rq_pos(req);
1103 nr = blk_rq_sectors(req);
1105 if (mmc_can_trim(card) && !mmc_erase_group_aligned(card, from, nr))
1106 arg = MMC_SECURE_TRIM1_ARG;
1108 arg = MMC_SECURE_ERASE_ARG;
1111 if (card->quirks & MMC_QUIRK_INAND_CMD38) {
1112 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1113 INAND_CMD38_ARG_EXT_CSD,
1114 arg == MMC_SECURE_TRIM1_ARG ?
1115 INAND_CMD38_ARG_SECTRIM1 :
1116 INAND_CMD38_ARG_SECERASE,
1122 err = mmc_erase(card, from, nr, arg);
1128 if (arg == MMC_SECURE_TRIM1_ARG) {
1129 if (card->quirks & MMC_QUIRK_INAND_CMD38) {
1130 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1131 INAND_CMD38_ARG_EXT_CSD,
1132 INAND_CMD38_ARG_SECTRIM2,
1138 err = mmc_erase(card, from, nr, MMC_SECURE_TRIM2_ARG);
1146 if (err && !mmc_blk_reset(md, card->host, type))
1149 mmc_blk_reset_success(md, type);
1151 blk_end_request(req, err, blk_rq_bytes(req));
1156 static int mmc_blk_issue_flush(struct mmc_queue *mq, struct request *req)
1158 struct mmc_blk_data *md = mq->data;
1159 struct mmc_card *card = md->queue.card;
1162 ret = mmc_flush_cache(card);
1166 blk_end_request_all(req, ret);
1172 * Reformat current write as a reliable write, supporting
1173 * both legacy and the enhanced reliable write MMC cards.
1174 * In each transfer we'll handle only as much as a single
1175 * reliable write can handle, thus finish the request in
1176 * partial completions.
1178 static inline void mmc_apply_rel_rw(struct mmc_blk_request *brq,
1179 struct mmc_card *card,
1180 struct request *req)
1182 if (!(card->ext_csd.rel_param & EXT_CSD_WR_REL_PARAM_EN)) {
1183 /* Legacy mode imposes restrictions on transfers. */
1184 if (!IS_ALIGNED(brq->cmd.arg, card->ext_csd.rel_sectors))
1185 brq->data.blocks = 1;
1187 if (brq->data.blocks > card->ext_csd.rel_sectors)
1188 brq->data.blocks = card->ext_csd.rel_sectors;
1189 else if (brq->data.blocks < card->ext_csd.rel_sectors)
1190 brq->data.blocks = 1;
1194 #define CMD_ERRORS \
1195 (R1_OUT_OF_RANGE | /* Command argument out of range */ \
1196 R1_ADDRESS_ERROR | /* Misaligned address */ \
1197 R1_BLOCK_LEN_ERROR | /* Transferred block length incorrect */\
1198 R1_WP_VIOLATION | /* Tried to write to protected block */ \
1199 R1_CC_ERROR | /* Card controller error */ \
1200 R1_ERROR) /* General/unknown error */
1202 static int mmc_blk_err_check(struct mmc_card *card,
1203 struct mmc_async_req *areq)
1205 struct mmc_queue_req *mq_mrq = container_of(areq, struct mmc_queue_req,
1207 struct mmc_blk_request *brq = &mq_mrq->brq;
1208 struct request *req = mq_mrq->req;
1209 int ecc_err = 0, gen_err = 0;
1212 * sbc.error indicates a problem with the set block count
1213 * command. No data will have been transferred.
1215 * cmd.error indicates a problem with the r/w command. No
1216 * data will have been transferred.
1218 * stop.error indicates a problem with the stop command. Data
1219 * may have been transferred, or may still be transferring.
1221 if (brq->sbc.error || brq->cmd.error || brq->stop.error ||
1223 switch (mmc_blk_cmd_recovery(card, req, brq, &ecc_err, &gen_err)) {
1225 return MMC_BLK_RETRY;
1227 return MMC_BLK_ABORT;
1229 return MMC_BLK_NOMEDIUM;
1236 * Check for errors relating to the execution of the
1237 * initial command - such as address errors. No data
1238 * has been transferred.
1240 if (brq->cmd.resp[0] & CMD_ERRORS) {
1241 pr_err("%s: r/w command failed, status = %#x\n",
1242 req->rq_disk->disk_name, brq->cmd.resp[0]);
1243 return MMC_BLK_ABORT;
1247 * Everything else is either success, or a data error of some
1248 * kind. If it was a write, we may have transitioned to
1249 * program mode, which we have to wait for it to complete.
1251 if (!mmc_host_is_spi(card->host) && rq_data_dir(req) != READ) {
1254 /* Check stop command response */
1255 if (brq->stop.resp[0] & R1_ERROR) {
1256 pr_err("%s: %s: general error sending stop command, stop cmd response %#x\n",
1257 req->rq_disk->disk_name, __func__,
1262 err = card_busy_detect(card, MMC_BLK_TIMEOUT_MS, false, req,
1265 return MMC_BLK_CMD_ERR;
1268 /* if general error occurs, retry the write operation. */
1270 pr_warn("%s: retrying write for general error\n",
1271 req->rq_disk->disk_name);
1272 return MMC_BLK_RETRY;
1275 if (brq->data.error) {
1276 pr_err("%s: error %d transferring data, sector %u, nr %u, cmd response %#x, card status %#x\n",
1277 req->rq_disk->disk_name, brq->data.error,
1278 (unsigned)blk_rq_pos(req),
1279 (unsigned)blk_rq_sectors(req),
1280 brq->cmd.resp[0], brq->stop.resp[0]);
1282 if (rq_data_dir(req) == READ) {
1284 return MMC_BLK_ECC_ERR;
1285 return MMC_BLK_DATA_ERR;
1287 return MMC_BLK_CMD_ERR;
1291 if (!brq->data.bytes_xfered)
1292 return MMC_BLK_RETRY;
1294 if (mmc_packed_cmd(mq_mrq->cmd_type)) {
1295 if (unlikely(brq->data.blocks << 9 != brq->data.bytes_xfered))
1296 return MMC_BLK_PARTIAL;
1298 return MMC_BLK_SUCCESS;
1301 if (blk_rq_bytes(req) != brq->data.bytes_xfered)
1302 return MMC_BLK_PARTIAL;
1304 return MMC_BLK_SUCCESS;
1307 static int mmc_blk_packed_err_check(struct mmc_card *card,
1308 struct mmc_async_req *areq)
1310 struct mmc_queue_req *mq_rq = container_of(areq, struct mmc_queue_req,
1312 struct request *req = mq_rq->req;
1313 struct mmc_packed *packed = mq_rq->packed;
1314 int err, check, status;
1320 check = mmc_blk_err_check(card, areq);
1321 err = get_card_status(card, &status, 0);
1323 pr_err("%s: error %d sending status command\n",
1324 req->rq_disk->disk_name, err);
1325 return MMC_BLK_ABORT;
1328 if (status & R1_EXCEPTION_EVENT) {
1329 err = mmc_get_ext_csd(card, &ext_csd);
1331 pr_err("%s: error %d sending ext_csd\n",
1332 req->rq_disk->disk_name, err);
1333 return MMC_BLK_ABORT;
1336 if ((ext_csd[EXT_CSD_EXP_EVENTS_STATUS] &
1337 EXT_CSD_PACKED_FAILURE) &&
1338 (ext_csd[EXT_CSD_PACKED_CMD_STATUS] &
1339 EXT_CSD_PACKED_GENERIC_ERROR)) {
1340 if (ext_csd[EXT_CSD_PACKED_CMD_STATUS] &
1341 EXT_CSD_PACKED_INDEXED_ERROR) {
1342 packed->idx_failure =
1343 ext_csd[EXT_CSD_PACKED_FAILURE_INDEX] - 1;
1344 check = MMC_BLK_PARTIAL;
1346 pr_err("%s: packed cmd failed, nr %u, sectors %u, "
1347 "failure index: %d\n",
1348 req->rq_disk->disk_name, packed->nr_entries,
1349 packed->blocks, packed->idx_failure);
1357 static void mmc_blk_rw_rq_prep(struct mmc_queue_req *mqrq,
1358 struct mmc_card *card,
1360 struct mmc_queue *mq)
1362 u32 readcmd, writecmd;
1363 struct mmc_blk_request *brq = &mqrq->brq;
1364 struct request *req = mqrq->req;
1365 struct mmc_blk_data *md = mq->data;
1369 * Reliable writes are used to implement Forced Unit Access and
1370 * REQ_META accesses, and are supported only on MMCs.
1372 * XXX: this really needs a good explanation of why REQ_META
1373 * is treated special.
1375 bool do_rel_wr = ((req->cmd_flags & REQ_FUA) ||
1376 (req->cmd_flags & REQ_META)) &&
1377 (rq_data_dir(req) == WRITE) &&
1378 (md->flags & MMC_BLK_REL_WR);
1380 memset(brq, 0, sizeof(struct mmc_blk_request));
1381 brq->mrq.cmd = &brq->cmd;
1382 brq->mrq.data = &brq->data;
1384 brq->cmd.arg = blk_rq_pos(req);
1385 if (!mmc_card_blockaddr(card))
1387 brq->cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC;
1388 brq->data.blksz = 512;
1389 brq->stop.opcode = MMC_STOP_TRANSMISSION;
1391 brq->data.blocks = blk_rq_sectors(req);
1394 * The block layer doesn't support all sector count
1395 * restrictions, so we need to be prepared for too big
1398 if (brq->data.blocks > card->host->max_blk_count)
1399 brq->data.blocks = card->host->max_blk_count;
1401 if (brq->data.blocks > 1) {
1403 * After a read error, we redo the request one sector
1404 * at a time in order to accurately determine which
1405 * sectors can be read successfully.
1408 brq->data.blocks = 1;
1411 * Some controllers have HW issues while operating
1412 * in multiple I/O mode
1414 if (card->host->ops->multi_io_quirk)
1415 brq->data.blocks = card->host->ops->multi_io_quirk(card,
1416 (rq_data_dir(req) == READ) ?
1417 MMC_DATA_READ : MMC_DATA_WRITE,
1421 if (brq->data.blocks > 1 || do_rel_wr) {
1422 /* SPI multiblock writes terminate using a special
1423 * token, not a STOP_TRANSMISSION request.
1425 if (!mmc_host_is_spi(card->host) ||
1426 rq_data_dir(req) == READ)
1427 brq->mrq.stop = &brq->stop;
1428 readcmd = MMC_READ_MULTIPLE_BLOCK;
1429 writecmd = MMC_WRITE_MULTIPLE_BLOCK;
1431 brq->mrq.stop = NULL;
1432 readcmd = MMC_READ_SINGLE_BLOCK;
1433 writecmd = MMC_WRITE_BLOCK;
1435 if (rq_data_dir(req) == READ) {
1436 brq->cmd.opcode = readcmd;
1437 brq->data.flags |= MMC_DATA_READ;
1439 brq->stop.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 |
1442 brq->cmd.opcode = writecmd;
1443 brq->data.flags |= MMC_DATA_WRITE;
1445 brq->stop.flags = MMC_RSP_SPI_R1B | MMC_RSP_R1B |
1450 mmc_apply_rel_rw(brq, card, req);
1453 * Data tag is used only during writing meta data to speed
1454 * up write and any subsequent read of this meta data
1456 do_data_tag = (card->ext_csd.data_tag_unit_size) &&
1457 (req->cmd_flags & REQ_META) &&
1458 (rq_data_dir(req) == WRITE) &&
1459 ((brq->data.blocks * brq->data.blksz) >=
1460 card->ext_csd.data_tag_unit_size);
1463 * Pre-defined multi-block transfers are preferable to
1464 * open ended-ones (and necessary for reliable writes).
1465 * However, it is not sufficient to just send CMD23,
1466 * and avoid the final CMD12, as on an error condition
1467 * CMD12 (stop) needs to be sent anyway. This, coupled
1468 * with Auto-CMD23 enhancements provided by some
1469 * hosts, means that the complexity of dealing
1470 * with this is best left to the host. If CMD23 is
1471 * supported by card and host, we'll fill sbc in and let
1472 * the host deal with handling it correctly. This means
1473 * that for hosts that don't expose MMC_CAP_CMD23, no
1474 * change of behavior will be observed.
1476 * N.B: Some MMC cards experience perf degradation.
1477 * We'll avoid using CMD23-bounded multiblock writes for
1478 * these, while retaining features like reliable writes.
1480 if ((md->flags & MMC_BLK_CMD23) && mmc_op_multi(brq->cmd.opcode) &&
1481 (do_rel_wr || !(card->quirks & MMC_QUIRK_BLK_NO_CMD23) ||
1483 brq->sbc.opcode = MMC_SET_BLOCK_COUNT;
1484 brq->sbc.arg = brq->data.blocks |
1485 (do_rel_wr ? (1 << 31) : 0) |
1486 (do_data_tag ? (1 << 29) : 0);
1487 brq->sbc.flags = MMC_RSP_R1 | MMC_CMD_AC;
1488 brq->mrq.sbc = &brq->sbc;
1491 mmc_set_data_timeout(&brq->data, card);
1493 brq->data.sg = mqrq->sg;
1494 brq->data.sg_len = mmc_queue_map_sg(mq, mqrq);
1497 * Adjust the sg list so it is the same size as the
1500 if (brq->data.blocks != blk_rq_sectors(req)) {
1501 int i, data_size = brq->data.blocks << 9;
1502 struct scatterlist *sg;
1504 for_each_sg(brq->data.sg, sg, brq->data.sg_len, i) {
1505 data_size -= sg->length;
1506 if (data_size <= 0) {
1507 sg->length += data_size;
1512 brq->data.sg_len = i;
1515 mqrq->mmc_active.mrq = &brq->mrq;
1516 mqrq->mmc_active.err_check = mmc_blk_err_check;
1518 mmc_queue_bounce_pre(mqrq);
1521 static inline u8 mmc_calc_packed_hdr_segs(struct request_queue *q,
1522 struct mmc_card *card)
1524 unsigned int hdr_sz = mmc_large_sector(card) ? 4096 : 512;
1525 unsigned int max_seg_sz = queue_max_segment_size(q);
1526 unsigned int len, nr_segs = 0;
1529 len = min(hdr_sz, max_seg_sz);
1537 static u8 mmc_blk_prep_packed_list(struct mmc_queue *mq, struct request *req)
1539 struct request_queue *q = mq->queue;
1540 struct mmc_card *card = mq->card;
1541 struct request *cur = req, *next = NULL;
1542 struct mmc_blk_data *md = mq->data;
1543 struct mmc_queue_req *mqrq = mq->mqrq_cur;
1544 bool en_rel_wr = card->ext_csd.rel_param & EXT_CSD_WR_REL_PARAM_EN;
1545 unsigned int req_sectors = 0, phys_segments = 0;
1546 unsigned int max_blk_count, max_phys_segs;
1547 bool put_back = true;
1548 u8 max_packed_rw = 0;
1551 if (!(md->flags & MMC_BLK_PACKED_CMD))
1554 if ((rq_data_dir(cur) == WRITE) &&
1555 mmc_host_packed_wr(card->host))
1556 max_packed_rw = card->ext_csd.max_packed_writes;
1558 if (max_packed_rw == 0)
1561 if (mmc_req_rel_wr(cur) &&
1562 (md->flags & MMC_BLK_REL_WR) && !en_rel_wr)
1565 if (mmc_large_sector(card) &&
1566 !IS_ALIGNED(blk_rq_sectors(cur), 8))
1569 mmc_blk_clear_packed(mqrq);
1571 max_blk_count = min(card->host->max_blk_count,
1572 card->host->max_req_size >> 9);
1573 if (unlikely(max_blk_count > 0xffff))
1574 max_blk_count = 0xffff;
1576 max_phys_segs = queue_max_segments(q);
1577 req_sectors += blk_rq_sectors(cur);
1578 phys_segments += cur->nr_phys_segments;
1580 if (rq_data_dir(cur) == WRITE) {
1581 req_sectors += mmc_large_sector(card) ? 8 : 1;
1582 phys_segments += mmc_calc_packed_hdr_segs(q, card);
1586 if (reqs >= max_packed_rw - 1) {
1591 spin_lock_irq(q->queue_lock);
1592 next = blk_fetch_request(q);
1593 spin_unlock_irq(q->queue_lock);
1599 if (mmc_large_sector(card) &&
1600 !IS_ALIGNED(blk_rq_sectors(next), 8))
1603 if (next->cmd_flags & REQ_DISCARD ||
1604 next->cmd_flags & REQ_FLUSH)
1607 if (rq_data_dir(cur) != rq_data_dir(next))
1610 if (mmc_req_rel_wr(next) &&
1611 (md->flags & MMC_BLK_REL_WR) && !en_rel_wr)
1614 req_sectors += blk_rq_sectors(next);
1615 if (req_sectors > max_blk_count)
1618 phys_segments += next->nr_phys_segments;
1619 if (phys_segments > max_phys_segs)
1622 list_add_tail(&next->queuelist, &mqrq->packed->list);
1628 spin_lock_irq(q->queue_lock);
1629 blk_requeue_request(q, next);
1630 spin_unlock_irq(q->queue_lock);
1634 list_add(&req->queuelist, &mqrq->packed->list);
1635 mqrq->packed->nr_entries = ++reqs;
1636 mqrq->packed->retries = reqs;
1641 mqrq->cmd_type = MMC_PACKED_NONE;
1645 static void mmc_blk_packed_hdr_wrq_prep(struct mmc_queue_req *mqrq,
1646 struct mmc_card *card,
1647 struct mmc_queue *mq)
1649 struct mmc_blk_request *brq = &mqrq->brq;
1650 struct request *req = mqrq->req;
1651 struct request *prq;
1652 struct mmc_blk_data *md = mq->data;
1653 struct mmc_packed *packed = mqrq->packed;
1654 bool do_rel_wr, do_data_tag;
1655 u32 *packed_cmd_hdr;
1661 mqrq->cmd_type = MMC_PACKED_WRITE;
1663 packed->idx_failure = MMC_PACKED_NR_IDX;
1665 packed_cmd_hdr = packed->cmd_hdr;
1666 memset(packed_cmd_hdr, 0, sizeof(packed->cmd_hdr));
1667 packed_cmd_hdr[0] = (packed->nr_entries << 16) |
1668 (PACKED_CMD_WR << 8) | PACKED_CMD_VER;
1669 hdr_blocks = mmc_large_sector(card) ? 8 : 1;
1672 * Argument for each entry of packed group
1674 list_for_each_entry(prq, &packed->list, queuelist) {
1675 do_rel_wr = mmc_req_rel_wr(prq) && (md->flags & MMC_BLK_REL_WR);
1676 do_data_tag = (card->ext_csd.data_tag_unit_size) &&
1677 (prq->cmd_flags & REQ_META) &&
1678 (rq_data_dir(prq) == WRITE) &&
1679 ((brq->data.blocks * brq->data.blksz) >=
1680 card->ext_csd.data_tag_unit_size);
1681 /* Argument of CMD23 */
1682 packed_cmd_hdr[(i * 2)] =
1683 (do_rel_wr ? MMC_CMD23_ARG_REL_WR : 0) |
1684 (do_data_tag ? MMC_CMD23_ARG_TAG_REQ : 0) |
1685 blk_rq_sectors(prq);
1686 /* Argument of CMD18 or CMD25 */
1687 packed_cmd_hdr[((i * 2)) + 1] =
1688 mmc_card_blockaddr(card) ?
1689 blk_rq_pos(prq) : blk_rq_pos(prq) << 9;
1690 packed->blocks += blk_rq_sectors(prq);
1694 memset(brq, 0, sizeof(struct mmc_blk_request));
1695 brq->mrq.cmd = &brq->cmd;
1696 brq->mrq.data = &brq->data;
1697 brq->mrq.sbc = &brq->sbc;
1698 brq->mrq.stop = &brq->stop;
1700 brq->sbc.opcode = MMC_SET_BLOCK_COUNT;
1701 brq->sbc.arg = MMC_CMD23_ARG_PACKED | (packed->blocks + hdr_blocks);
1702 brq->sbc.flags = MMC_RSP_R1 | MMC_CMD_AC;
1704 brq->cmd.opcode = MMC_WRITE_MULTIPLE_BLOCK;
1705 brq->cmd.arg = blk_rq_pos(req);
1706 if (!mmc_card_blockaddr(card))
1708 brq->cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC;
1710 brq->data.blksz = 512;
1711 brq->data.blocks = packed->blocks + hdr_blocks;
1712 brq->data.flags |= MMC_DATA_WRITE;
1714 brq->stop.opcode = MMC_STOP_TRANSMISSION;
1716 brq->stop.flags = MMC_RSP_SPI_R1B | MMC_RSP_R1B | MMC_CMD_AC;
1718 mmc_set_data_timeout(&brq->data, card);
1720 brq->data.sg = mqrq->sg;
1721 brq->data.sg_len = mmc_queue_map_sg(mq, mqrq);
1723 mqrq->mmc_active.mrq = &brq->mrq;
1724 mqrq->mmc_active.err_check = mmc_blk_packed_err_check;
1726 mmc_queue_bounce_pre(mqrq);
1729 static int mmc_blk_cmd_err(struct mmc_blk_data *md, struct mmc_card *card,
1730 struct mmc_blk_request *brq, struct request *req,
1733 struct mmc_queue_req *mq_rq;
1734 mq_rq = container_of(brq, struct mmc_queue_req, brq);
1737 * If this is an SD card and we're writing, we can first
1738 * mark the known good sectors as ok.
1740 * If the card is not SD, we can still ok written sectors
1741 * as reported by the controller (which might be less than
1742 * the real number of written sectors, but never more).
1744 if (mmc_card_sd(card)) {
1747 blocks = mmc_sd_num_wr_blocks(card);
1748 if (blocks != (u32)-1) {
1749 ret = blk_end_request(req, 0, blocks << 9);
1752 if (!mmc_packed_cmd(mq_rq->cmd_type))
1753 ret = blk_end_request(req, 0, brq->data.bytes_xfered);
1758 static int mmc_blk_end_packed_req(struct mmc_queue_req *mq_rq)
1760 struct request *prq;
1761 struct mmc_packed *packed = mq_rq->packed;
1762 int idx = packed->idx_failure, i = 0;
1767 while (!list_empty(&packed->list)) {
1768 prq = list_entry_rq(packed->list.next);
1770 /* retry from error index */
1771 packed->nr_entries -= idx;
1775 if (packed->nr_entries == MMC_PACKED_NR_SINGLE) {
1776 list_del_init(&prq->queuelist);
1777 mmc_blk_clear_packed(mq_rq);
1781 list_del_init(&prq->queuelist);
1782 blk_end_request(prq, 0, blk_rq_bytes(prq));
1786 mmc_blk_clear_packed(mq_rq);
1790 static void mmc_blk_abort_packed_req(struct mmc_queue_req *mq_rq)
1792 struct request *prq;
1793 struct mmc_packed *packed = mq_rq->packed;
1797 while (!list_empty(&packed->list)) {
1798 prq = list_entry_rq(packed->list.next);
1799 list_del_init(&prq->queuelist);
1800 blk_end_request(prq, -EIO, blk_rq_bytes(prq));
1803 mmc_blk_clear_packed(mq_rq);
1806 static void mmc_blk_revert_packed_req(struct mmc_queue *mq,
1807 struct mmc_queue_req *mq_rq)
1809 struct request *prq;
1810 struct request_queue *q = mq->queue;
1811 struct mmc_packed *packed = mq_rq->packed;
1815 while (!list_empty(&packed->list)) {
1816 prq = list_entry_rq(packed->list.prev);
1817 if (prq->queuelist.prev != &packed->list) {
1818 list_del_init(&prq->queuelist);
1819 spin_lock_irq(q->queue_lock);
1820 blk_requeue_request(mq->queue, prq);
1821 spin_unlock_irq(q->queue_lock);
1823 list_del_init(&prq->queuelist);
1827 mmc_blk_clear_packed(mq_rq);
1830 static int mmc_blk_issue_rw_rq(struct mmc_queue *mq, struct request *rqc)
1832 struct mmc_blk_data *md = mq->data;
1833 struct mmc_card *card = md->queue.card;
1834 struct mmc_blk_request *brq = &mq->mqrq_cur->brq;
1835 int ret = 1, disable_multi = 0, retry = 0, type;
1836 enum mmc_blk_status status;
1837 struct mmc_queue_req *mq_rq;
1838 struct request *req = rqc;
1839 struct mmc_async_req *areq;
1840 const u8 packed_nr = 2;
1843 if (!rqc && !mq->mqrq_prev->req)
1847 reqs = mmc_blk_prep_packed_list(mq, rqc);
1852 * When 4KB native sector is enabled, only 8 blocks
1853 * multiple read or write is allowed
1855 if ((brq->data.blocks & 0x07) &&
1856 (card->ext_csd.data_sector_size == 4096)) {
1857 pr_err("%s: Transfer size is not 4KB sector size aligned\n",
1858 req->rq_disk->disk_name);
1859 mq_rq = mq->mqrq_cur;
1863 if (reqs >= packed_nr)
1864 mmc_blk_packed_hdr_wrq_prep(mq->mqrq_cur,
1867 mmc_blk_rw_rq_prep(mq->mqrq_cur, card, 0, mq);
1868 areq = &mq->mqrq_cur->mmc_active;
1871 areq = mmc_start_req(card->host, areq, (int *) &status);
1873 if (status == MMC_BLK_NEW_REQUEST)
1874 mq->flags |= MMC_QUEUE_NEW_REQUEST;
1878 mq_rq = container_of(areq, struct mmc_queue_req, mmc_active);
1881 type = rq_data_dir(req) == READ ? MMC_BLK_READ : MMC_BLK_WRITE;
1882 mmc_queue_bounce_post(mq_rq);
1885 case MMC_BLK_SUCCESS:
1886 case MMC_BLK_PARTIAL:
1888 * A block was successfully transferred.
1890 mmc_blk_reset_success(md, type);
1892 if (mmc_packed_cmd(mq_rq->cmd_type)) {
1893 ret = mmc_blk_end_packed_req(mq_rq);
1896 ret = blk_end_request(req, 0,
1897 brq->data.bytes_xfered);
1901 * If the blk_end_request function returns non-zero even
1902 * though all data has been transferred and no errors
1903 * were returned by the host controller, it's a bug.
1905 if (status == MMC_BLK_SUCCESS && ret) {
1906 pr_err("%s BUG rq_tot %d d_xfer %d\n",
1907 __func__, blk_rq_bytes(req),
1908 brq->data.bytes_xfered);
1913 case MMC_BLK_CMD_ERR:
1914 ret = mmc_blk_cmd_err(md, card, brq, req, ret);
1915 if (mmc_blk_reset(md, card->host, type))
1925 if (!mmc_blk_reset(md, card->host, type))
1928 case MMC_BLK_DATA_ERR: {
1931 err = mmc_blk_reset(md, card->host, type);
1934 if (err == -ENODEV ||
1935 mmc_packed_cmd(mq_rq->cmd_type))
1939 case MMC_BLK_ECC_ERR:
1940 if (brq->data.blocks > 1) {
1941 /* Redo read one sector at a time */
1942 pr_warn("%s: retrying using single block read\n",
1943 req->rq_disk->disk_name);
1948 * After an error, we redo I/O one sector at a
1949 * time, so we only reach here after trying to
1950 * read a single sector.
1952 ret = blk_end_request(req, -EIO,
1957 case MMC_BLK_NOMEDIUM:
1960 pr_err("%s: Unhandled return value (%d)",
1961 req->rq_disk->disk_name, status);
1966 if (mmc_packed_cmd(mq_rq->cmd_type)) {
1967 if (!mq_rq->packed->retries)
1969 mmc_blk_packed_hdr_wrq_prep(mq_rq, card, mq);
1970 mmc_start_req(card->host,
1971 &mq_rq->mmc_active, NULL);
1975 * In case of a incomplete request
1976 * prepare it again and resend.
1978 mmc_blk_rw_rq_prep(mq_rq, card,
1980 mmc_start_req(card->host,
1981 &mq_rq->mmc_active, NULL);
1989 if (mmc_packed_cmd(mq_rq->cmd_type)) {
1990 mmc_blk_abort_packed_req(mq_rq);
1992 if (mmc_card_removed(card))
1993 req->cmd_flags |= REQ_QUIET;
1995 ret = blk_end_request(req, -EIO,
1996 blk_rq_cur_bytes(req));
2001 if (mmc_card_removed(card)) {
2002 rqc->cmd_flags |= REQ_QUIET;
2003 blk_end_request_all(rqc, -EIO);
2006 * If current request is packed, it needs to put back.
2008 if (mmc_packed_cmd(mq->mqrq_cur->cmd_type))
2009 mmc_blk_revert_packed_req(mq, mq->mqrq_cur);
2011 mmc_blk_rw_rq_prep(mq->mqrq_cur, card, 0, mq);
2012 mmc_start_req(card->host,
2013 &mq->mqrq_cur->mmc_active, NULL);
2020 static int mmc_blk_issue_rq(struct mmc_queue *mq, struct request *req)
2023 struct mmc_blk_data *md = mq->data;
2024 struct mmc_card *card = md->queue.card;
2025 struct mmc_host *host = card->host;
2026 unsigned long flags;
2027 unsigned int cmd_flags = req ? req->cmd_flags : 0;
2029 if (req && !mq->mqrq_prev->req)
2030 /* claim host only for the first request */
2033 ret = mmc_blk_part_switch(card, md);
2036 blk_end_request_all(req, -EIO);
2042 mq->flags &= ~MMC_QUEUE_NEW_REQUEST;
2043 if (cmd_flags & REQ_DISCARD) {
2044 /* complete ongoing async transfer before issuing discard */
2045 if (card->host->areq)
2046 mmc_blk_issue_rw_rq(mq, NULL);
2047 if (req->cmd_flags & REQ_SECURE)
2048 ret = mmc_blk_issue_secdiscard_rq(mq, req);
2050 ret = mmc_blk_issue_discard_rq(mq, req);
2051 } else if (cmd_flags & REQ_FLUSH) {
2052 /* complete ongoing async transfer before issuing flush */
2053 if (card->host->areq)
2054 mmc_blk_issue_rw_rq(mq, NULL);
2055 ret = mmc_blk_issue_flush(mq, req);
2057 if (!req && host->areq) {
2058 spin_lock_irqsave(&host->context_info.lock, flags);
2059 host->context_info.is_waiting_last_req = true;
2060 spin_unlock_irqrestore(&host->context_info.lock, flags);
2062 ret = mmc_blk_issue_rw_rq(mq, req);
2066 if ((!req && !(mq->flags & MMC_QUEUE_NEW_REQUEST)) ||
2067 (cmd_flags & MMC_REQ_SPECIAL_MASK))
2069 * Release host when there are no more requests
2070 * and after special request(discard, flush) is done.
2071 * In case sepecial request, there is no reentry to
2072 * the 'mmc_blk_issue_rq' with 'mqrq_prev->req'.
2078 static inline int mmc_blk_readonly(struct mmc_card *card)
2080 return mmc_card_readonly(card) ||
2081 !(card->csd.cmdclass & CCC_BLOCK_WRITE);
2084 static struct mmc_blk_data *mmc_blk_alloc_req(struct mmc_card *card,
2085 struct device *parent,
2088 const char *subname,
2091 struct mmc_blk_data *md;
2094 devidx = find_first_zero_bit(dev_use, max_devices);
2095 if (devidx >= max_devices)
2096 return ERR_PTR(-ENOSPC);
2097 __set_bit(devidx, dev_use);
2099 md = kzalloc(sizeof(struct mmc_blk_data), GFP_KERNEL);
2106 * !subname implies we are creating main mmc_blk_data that will be
2107 * associated with mmc_card with dev_set_drvdata. Due to device
2108 * partitions, devidx will not coincide with a per-physical card
2109 * index anymore so we keep track of a name index.
2112 md->name_idx = find_first_zero_bit(name_use, max_devices);
2113 __set_bit(md->name_idx, name_use);
2115 md->name_idx = ((struct mmc_blk_data *)
2116 dev_to_disk(parent)->private_data)->name_idx;
2118 md->area_type = area_type;
2121 * Set the read-only status based on the supported commands
2122 * and the write protect switch.
2124 md->read_only = mmc_blk_readonly(card);
2126 md->disk = alloc_disk(perdev_minors);
2127 if (md->disk == NULL) {
2132 spin_lock_init(&md->lock);
2133 INIT_LIST_HEAD(&md->part);
2136 ret = mmc_init_queue(&md->queue, card, &md->lock, subname);
2140 md->queue.issue_fn = mmc_blk_issue_rq;
2141 md->queue.data = md;
2143 md->disk->major = MMC_BLOCK_MAJOR;
2144 md->disk->first_minor = devidx * perdev_minors;
2145 md->disk->fops = &mmc_bdops;
2146 md->disk->private_data = md;
2147 md->disk->queue = md->queue.queue;
2148 md->disk->driverfs_dev = parent;
2149 set_disk_ro(md->disk, md->read_only || default_ro);
2150 if (area_type & (MMC_BLK_DATA_AREA_RPMB | MMC_BLK_DATA_AREA_BOOT))
2151 md->disk->flags |= GENHD_FL_NO_PART_SCAN;
2154 * As discussed on lkml, GENHD_FL_REMOVABLE should:
2156 * - be set for removable media with permanent block devices
2157 * - be unset for removable block devices with permanent media
2159 * Since MMC block devices clearly fall under the second
2160 * case, we do not set GENHD_FL_REMOVABLE. Userspace
2161 * should use the block device creation/destruction hotplug
2162 * messages to tell when the card is present.
2165 snprintf(md->disk->disk_name, sizeof(md->disk->disk_name),
2166 "mmcblk%u%s", md->name_idx, subname ? subname : "");
2168 if (mmc_card_mmc(card))
2169 blk_queue_logical_block_size(md->queue.queue,
2170 card->ext_csd.data_sector_size);
2172 blk_queue_logical_block_size(md->queue.queue, 512);
2174 set_capacity(md->disk, size);
2176 if (mmc_host_cmd23(card->host)) {
2177 if (mmc_card_mmc(card) ||
2178 (mmc_card_sd(card) &&
2179 card->scr.cmds & SD_SCR_CMD23_SUPPORT))
2180 md->flags |= MMC_BLK_CMD23;
2183 if (mmc_card_mmc(card) &&
2184 md->flags & MMC_BLK_CMD23 &&
2185 ((card->ext_csd.rel_param & EXT_CSD_WR_REL_PARAM_EN) ||
2186 card->ext_csd.rel_sectors)) {
2187 md->flags |= MMC_BLK_REL_WR;
2188 blk_queue_flush(md->queue.queue, REQ_FLUSH | REQ_FUA);
2191 if (mmc_card_mmc(card) &&
2192 (area_type == MMC_BLK_DATA_AREA_MAIN) &&
2193 (md->flags & MMC_BLK_CMD23) &&
2194 card->ext_csd.packed_event_en) {
2195 if (!mmc_packed_init(&md->queue, card))
2196 md->flags |= MMC_BLK_PACKED_CMD;
2206 return ERR_PTR(ret);
2209 static struct mmc_blk_data *mmc_blk_alloc(struct mmc_card *card)
2213 if (!mmc_card_sd(card) && mmc_card_blockaddr(card)) {
2215 * The EXT_CSD sector count is in number or 512 byte
2218 size = card->ext_csd.sectors;
2221 * The CSD capacity field is in units of read_blkbits.
2222 * set_capacity takes units of 512 bytes.
2224 size = card->csd.capacity << (card->csd.read_blkbits - 9);
2227 return mmc_blk_alloc_req(card, &card->dev, size, false, NULL,
2228 MMC_BLK_DATA_AREA_MAIN);
2231 static int mmc_blk_alloc_part(struct mmc_card *card,
2232 struct mmc_blk_data *md,
2233 unsigned int part_type,
2236 const char *subname,
2240 struct mmc_blk_data *part_md;
2242 part_md = mmc_blk_alloc_req(card, disk_to_dev(md->disk), size, default_ro,
2243 subname, area_type);
2244 if (IS_ERR(part_md))
2245 return PTR_ERR(part_md);
2246 part_md->part_type = part_type;
2247 list_add(&part_md->part, &md->part);
2249 string_get_size((u64)get_capacity(part_md->disk), 512, STRING_UNITS_2,
2250 cap_str, sizeof(cap_str));
2251 pr_info("%s: %s %s partition %u %s\n",
2252 part_md->disk->disk_name, mmc_card_id(card),
2253 mmc_card_name(card), part_md->part_type, cap_str);
2257 /* MMC Physical partitions consist of two boot partitions and
2258 * up to four general purpose partitions.
2259 * For each partition enabled in EXT_CSD a block device will be allocatedi
2260 * to provide access to the partition.
2263 static int mmc_blk_alloc_parts(struct mmc_card *card, struct mmc_blk_data *md)
2267 if (!mmc_card_mmc(card))
2270 for (idx = 0; idx < card->nr_parts; idx++) {
2271 if (card->part[idx].size) {
2272 ret = mmc_blk_alloc_part(card, md,
2273 card->part[idx].part_cfg,
2274 card->part[idx].size >> 9,
2275 card->part[idx].force_ro,
2276 card->part[idx].name,
2277 card->part[idx].area_type);
2286 static void mmc_blk_remove_req(struct mmc_blk_data *md)
2288 struct mmc_card *card;
2292 * Flush remaining requests and free queues. It
2293 * is freeing the queue that stops new requests
2294 * from being accepted.
2296 card = md->queue.card;
2297 mmc_cleanup_queue(&md->queue);
2298 if (md->flags & MMC_BLK_PACKED_CMD)
2299 mmc_packed_clean(&md->queue);
2300 if (md->disk->flags & GENHD_FL_UP) {
2301 device_remove_file(disk_to_dev(md->disk), &md->force_ro);
2302 if ((md->area_type & MMC_BLK_DATA_AREA_BOOT) &&
2303 card->ext_csd.boot_ro_lockable)
2304 device_remove_file(disk_to_dev(md->disk),
2305 &md->power_ro_lock);
2307 del_gendisk(md->disk);
2313 static void mmc_blk_remove_parts(struct mmc_card *card,
2314 struct mmc_blk_data *md)
2316 struct list_head *pos, *q;
2317 struct mmc_blk_data *part_md;
2319 __clear_bit(md->name_idx, name_use);
2320 list_for_each_safe(pos, q, &md->part) {
2321 part_md = list_entry(pos, struct mmc_blk_data, part);
2323 mmc_blk_remove_req(part_md);
2327 static int mmc_add_disk(struct mmc_blk_data *md)
2330 struct mmc_card *card = md->queue.card;
2333 md->force_ro.show = force_ro_show;
2334 md->force_ro.store = force_ro_store;
2335 sysfs_attr_init(&md->force_ro.attr);
2336 md->force_ro.attr.name = "force_ro";
2337 md->force_ro.attr.mode = S_IRUGO | S_IWUSR;
2338 ret = device_create_file(disk_to_dev(md->disk), &md->force_ro);
2342 if ((md->area_type & MMC_BLK_DATA_AREA_BOOT) &&
2343 card->ext_csd.boot_ro_lockable) {
2346 if (card->ext_csd.boot_ro_lock & EXT_CSD_BOOT_WP_B_PWR_WP_DIS)
2349 mode = S_IRUGO | S_IWUSR;
2351 md->power_ro_lock.show = power_ro_lock_show;
2352 md->power_ro_lock.store = power_ro_lock_store;
2353 sysfs_attr_init(&md->power_ro_lock.attr);
2354 md->power_ro_lock.attr.mode = mode;
2355 md->power_ro_lock.attr.name =
2356 "ro_lock_until_next_power_on";
2357 ret = device_create_file(disk_to_dev(md->disk),
2358 &md->power_ro_lock);
2360 goto power_ro_lock_fail;
2365 device_remove_file(disk_to_dev(md->disk), &md->force_ro);
2367 del_gendisk(md->disk);
2372 #define CID_MANFID_SANDISK 0x2
2373 #define CID_MANFID_TOSHIBA 0x11
2374 #define CID_MANFID_MICRON 0x13
2375 #define CID_MANFID_SAMSUNG 0x15
2377 static const struct mmc_fixup blk_fixups[] =
2379 MMC_FIXUP("SEM02G", CID_MANFID_SANDISK, 0x100, add_quirk,
2380 MMC_QUIRK_INAND_CMD38),
2381 MMC_FIXUP("SEM04G", CID_MANFID_SANDISK, 0x100, add_quirk,
2382 MMC_QUIRK_INAND_CMD38),
2383 MMC_FIXUP("SEM08G", CID_MANFID_SANDISK, 0x100, add_quirk,
2384 MMC_QUIRK_INAND_CMD38),
2385 MMC_FIXUP("SEM16G", CID_MANFID_SANDISK, 0x100, add_quirk,
2386 MMC_QUIRK_INAND_CMD38),
2387 MMC_FIXUP("SEM32G", CID_MANFID_SANDISK, 0x100, add_quirk,
2388 MMC_QUIRK_INAND_CMD38),
2391 * Some MMC cards experience performance degradation with CMD23
2392 * instead of CMD12-bounded multiblock transfers. For now we'll
2393 * black list what's bad...
2394 * - Certain Toshiba cards.
2396 * N.B. This doesn't affect SD cards.
2398 MMC_FIXUP("MMC08G", CID_MANFID_TOSHIBA, CID_OEMID_ANY, add_quirk_mmc,
2399 MMC_QUIRK_BLK_NO_CMD23),
2400 MMC_FIXUP("MMC16G", CID_MANFID_TOSHIBA, CID_OEMID_ANY, add_quirk_mmc,
2401 MMC_QUIRK_BLK_NO_CMD23),
2402 MMC_FIXUP("MMC32G", CID_MANFID_TOSHIBA, CID_OEMID_ANY, add_quirk_mmc,
2403 MMC_QUIRK_BLK_NO_CMD23),
2406 * Some Micron MMC cards needs longer data read timeout than
2409 MMC_FIXUP(CID_NAME_ANY, CID_MANFID_MICRON, 0x200, add_quirk_mmc,
2410 MMC_QUIRK_LONG_READ_TIME),
2413 * On these Samsung MoviNAND parts, performing secure erase or
2414 * secure trim can result in unrecoverable corruption due to a
2417 MMC_FIXUP("M8G2FA", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2418 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2419 MMC_FIXUP("MAG4FA", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2420 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2421 MMC_FIXUP("MBG8FA", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2422 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2423 MMC_FIXUP("MCGAFA", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2424 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2425 MMC_FIXUP("VAL00M", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2426 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2427 MMC_FIXUP("VYL00M", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2428 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2429 MMC_FIXUP("KYL00M", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2430 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2431 MMC_FIXUP("VZL00M", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2432 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2437 static int mmc_blk_probe(struct mmc_card *card)
2439 struct mmc_blk_data *md, *part_md;
2443 * Check that the card supports the command class(es) we need.
2445 if (!(card->csd.cmdclass & CCC_BLOCK_READ))
2448 mmc_fixup_device(card, blk_fixups);
2450 md = mmc_blk_alloc(card);
2454 string_get_size((u64)get_capacity(md->disk), 512, STRING_UNITS_2,
2455 cap_str, sizeof(cap_str));
2456 pr_info("%s: %s %s %s %s\n",
2457 md->disk->disk_name, mmc_card_id(card), mmc_card_name(card),
2458 cap_str, md->read_only ? "(ro)" : "");
2460 if (mmc_blk_alloc_parts(card, md))
2463 dev_set_drvdata(&card->dev, md);
2465 if (mmc_add_disk(md))
2468 list_for_each_entry(part_md, &md->part, part) {
2469 if (mmc_add_disk(part_md))
2473 pm_runtime_set_autosuspend_delay(&card->dev, 3000);
2474 pm_runtime_use_autosuspend(&card->dev);
2477 * Don't enable runtime PM for SD-combo cards here. Leave that
2478 * decision to be taken during the SDIO init sequence instead.
2480 if (card->type != MMC_TYPE_SD_COMBO) {
2481 pm_runtime_set_active(&card->dev);
2482 pm_runtime_enable(&card->dev);
2488 mmc_blk_remove_parts(card, md);
2489 mmc_blk_remove_req(md);
2493 static void mmc_blk_remove(struct mmc_card *card)
2495 struct mmc_blk_data *md = dev_get_drvdata(&card->dev);
2497 mmc_blk_remove_parts(card, md);
2498 pm_runtime_get_sync(&card->dev);
2499 mmc_claim_host(card->host);
2500 mmc_blk_part_switch(card, md);
2501 mmc_release_host(card->host);
2502 if (card->type != MMC_TYPE_SD_COMBO)
2503 pm_runtime_disable(&card->dev);
2504 pm_runtime_put_noidle(&card->dev);
2505 mmc_blk_remove_req(md);
2506 dev_set_drvdata(&card->dev, NULL);
2509 static int _mmc_blk_suspend(struct mmc_card *card)
2511 struct mmc_blk_data *part_md;
2512 struct mmc_blk_data *md = dev_get_drvdata(&card->dev);
2515 mmc_queue_suspend(&md->queue);
2516 list_for_each_entry(part_md, &md->part, part) {
2517 mmc_queue_suspend(&part_md->queue);
2523 static void mmc_blk_shutdown(struct mmc_card *card)
2525 _mmc_blk_suspend(card);
2528 #ifdef CONFIG_PM_SLEEP
2529 static int mmc_blk_suspend(struct device *dev)
2531 struct mmc_card *card = mmc_dev_to_card(dev);
2533 return _mmc_blk_suspend(card);
2536 static int mmc_blk_resume(struct device *dev)
2538 struct mmc_blk_data *part_md;
2539 struct mmc_blk_data *md = dev_get_drvdata(dev);
2543 * Resume involves the card going into idle state,
2544 * so current partition is always the main one.
2546 md->part_curr = md->part_type;
2547 mmc_queue_resume(&md->queue);
2548 list_for_each_entry(part_md, &md->part, part) {
2549 mmc_queue_resume(&part_md->queue);
2556 static SIMPLE_DEV_PM_OPS(mmc_blk_pm_ops, mmc_blk_suspend, mmc_blk_resume);
2558 static struct mmc_driver mmc_driver = {
2561 .pm = &mmc_blk_pm_ops,
2563 .probe = mmc_blk_probe,
2564 .remove = mmc_blk_remove,
2565 .shutdown = mmc_blk_shutdown,
2568 static int __init mmc_blk_init(void)
2572 if (perdev_minors != CONFIG_MMC_BLOCK_MINORS)
2573 pr_info("mmcblk: using %d minors per device\n", perdev_minors);
2575 max_devices = min(MAX_DEVICES, (1 << MINORBITS) / perdev_minors);
2577 res = register_blkdev(MMC_BLOCK_MAJOR, "mmc");
2581 res = mmc_register_driver(&mmc_driver);
2587 unregister_blkdev(MMC_BLOCK_MAJOR, "mmc");
2592 static void __exit mmc_blk_exit(void)
2594 mmc_unregister_driver(&mmc_driver);
2595 unregister_blkdev(MMC_BLOCK_MAJOR, "mmc");
2598 module_init(mmc_blk_init);
2599 module_exit(mmc_blk_exit);
2601 MODULE_LICENSE("GPL");
2602 MODULE_DESCRIPTION("Multimedia Card (MMC) block device driver");