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/cdev.h>
32 #include <linux/mutex.h>
33 #include <linux/scatterlist.h>
34 #include <linux/string_helpers.h>
35 #include <linux/delay.h>
36 #include <linux/capability.h>
37 #include <linux/compat.h>
38 #include <linux/pm_runtime.h>
39 #include <linux/idr.h>
40 #include <linux/debugfs.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 <linux/uaccess.h>
60 MODULE_ALIAS("mmc:block");
61 #ifdef MODULE_PARAM_PREFIX
62 #undef MODULE_PARAM_PREFIX
64 #define MODULE_PARAM_PREFIX "mmcblk."
67 * Set a 10 second timeout for polling write request busy state. Note, mmc core
68 * is setting a 3 second timeout for SD cards, and SDHCI has long had a 10
69 * second software timer to timeout the whole request, so 10 seconds should be
72 #define MMC_BLK_TIMEOUT_MS (10 * 1000)
73 #define MMC_EXTRACT_INDEX_FROM_ARG(x) ((x & 0x00FF0000) >> 16)
74 #define MMC_EXTRACT_VALUE_FROM_ARG(x) ((x & 0x0000FF00) >> 8)
76 #define mmc_req_rel_wr(req) ((req->cmd_flags & REQ_FUA) && \
77 (rq_data_dir(req) == WRITE))
78 static DEFINE_MUTEX(block_mutex);
81 * The defaults come from config options but can be overriden by module
84 static int perdev_minors = CONFIG_MMC_BLOCK_MINORS;
87 * We've only got one major, so number of mmcblk devices is
88 * limited to (1 << 20) / number of minors per device. It is also
89 * limited by the MAX_DEVICES below.
91 static int max_devices;
93 #define MAX_DEVICES 256
95 static DEFINE_IDA(mmc_blk_ida);
96 static DEFINE_IDA(mmc_rpmb_ida);
99 * There is one mmc_blk_data per slot.
101 struct mmc_blk_data {
102 struct device *parent;
103 struct gendisk *disk;
104 struct mmc_queue queue;
105 struct list_head part;
106 struct list_head rpmbs;
109 #define MMC_BLK_CMD23 (1 << 0) /* Can do SET_BLOCK_COUNT for multiblock */
110 #define MMC_BLK_REL_WR (1 << 1) /* MMC Reliable write support */
113 unsigned int read_only;
114 unsigned int part_type;
115 unsigned int reset_done;
116 #define MMC_BLK_READ BIT(0)
117 #define MMC_BLK_WRITE BIT(1)
118 #define MMC_BLK_DISCARD BIT(2)
119 #define MMC_BLK_SECDISCARD BIT(3)
120 #define MMC_BLK_CQE_RECOVERY BIT(4)
123 * Only set in main mmc_blk_data associated
124 * with mmc_card with dev_set_drvdata, and keeps
125 * track of the current selected device partition.
127 unsigned int part_curr;
128 struct device_attribute force_ro;
129 struct device_attribute power_ro_lock;
132 /* debugfs files (only in main mmc_blk_data) */
133 struct dentry *status_dentry;
134 struct dentry *ext_csd_dentry;
137 /* Device type for RPMB character devices */
138 static dev_t mmc_rpmb_devt;
140 /* Bus type for RPMB character devices */
141 static struct bus_type mmc_rpmb_bus_type = {
146 * struct mmc_rpmb_data - special RPMB device type for these areas
147 * @dev: the device for the RPMB area
148 * @chrdev: character device for the RPMB area
149 * @id: unique device ID number
150 * @part_index: partition index (0 on first)
151 * @md: parent MMC block device
152 * @node: list item, so we can put this device on a list
154 struct mmc_rpmb_data {
158 unsigned int part_index;
159 struct mmc_blk_data *md;
160 struct list_head node;
163 static DEFINE_MUTEX(open_lock);
165 module_param(perdev_minors, int, 0444);
166 MODULE_PARM_DESC(perdev_minors, "Minors numbers to allocate per device");
168 static inline int mmc_blk_part_switch(struct mmc_card *card,
169 unsigned int part_type);
170 static void mmc_blk_rw_rq_prep(struct mmc_queue_req *mqrq,
171 struct mmc_card *card,
173 struct mmc_queue *mq);
174 static void mmc_blk_hsq_req_done(struct mmc_request *mrq);
176 static struct mmc_blk_data *mmc_blk_get(struct gendisk *disk)
178 struct mmc_blk_data *md;
180 mutex_lock(&open_lock);
181 md = disk->private_data;
182 if (md && md->usage == 0)
186 mutex_unlock(&open_lock);
191 static inline int mmc_get_devidx(struct gendisk *disk)
193 int devidx = disk->first_minor / perdev_minors;
197 static void mmc_blk_put(struct mmc_blk_data *md)
199 mutex_lock(&open_lock);
201 if (md->usage == 0) {
202 int devidx = mmc_get_devidx(md->disk);
203 blk_put_queue(md->queue.queue);
204 ida_simple_remove(&mmc_blk_ida, devidx);
208 mutex_unlock(&open_lock);
211 static ssize_t power_ro_lock_show(struct device *dev,
212 struct device_attribute *attr, char *buf)
215 struct mmc_blk_data *md = mmc_blk_get(dev_to_disk(dev));
216 struct mmc_card *card = md->queue.card;
219 if (card->ext_csd.boot_ro_lock & EXT_CSD_BOOT_WP_B_PERM_WP_EN)
221 else if (card->ext_csd.boot_ro_lock & EXT_CSD_BOOT_WP_B_PWR_WP_EN)
224 ret = snprintf(buf, PAGE_SIZE, "%d\n", locked);
231 static ssize_t power_ro_lock_store(struct device *dev,
232 struct device_attribute *attr, const char *buf, size_t count)
235 struct mmc_blk_data *md, *part_md;
236 struct mmc_queue *mq;
240 if (kstrtoul(buf, 0, &set))
246 md = mmc_blk_get(dev_to_disk(dev));
249 /* Dispatch locking to the block layer */
250 req = blk_get_request(mq->queue, REQ_OP_DRV_OUT, 0);
252 count = PTR_ERR(req);
255 req_to_mmc_queue_req(req)->drv_op = MMC_DRV_OP_BOOT_WP;
256 req_to_mmc_queue_req(req)->drv_op_result = -EIO;
257 blk_execute_rq(mq->queue, NULL, req, 0);
258 ret = req_to_mmc_queue_req(req)->drv_op_result;
259 blk_put_request(req);
262 pr_info("%s: Locking boot partition ro until next power on\n",
263 md->disk->disk_name);
264 set_disk_ro(md->disk, 1);
266 list_for_each_entry(part_md, &md->part, part)
267 if (part_md->area_type == MMC_BLK_DATA_AREA_BOOT) {
268 pr_info("%s: Locking boot partition ro until next power on\n", part_md->disk->disk_name);
269 set_disk_ro(part_md->disk, 1);
277 static ssize_t force_ro_show(struct device *dev, struct device_attribute *attr,
281 struct mmc_blk_data *md = mmc_blk_get(dev_to_disk(dev));
283 ret = snprintf(buf, PAGE_SIZE, "%d\n",
284 get_disk_ro(dev_to_disk(dev)) ^
290 static ssize_t force_ro_store(struct device *dev, struct device_attribute *attr,
291 const char *buf, size_t count)
295 struct mmc_blk_data *md = mmc_blk_get(dev_to_disk(dev));
296 unsigned long set = simple_strtoul(buf, &end, 0);
302 set_disk_ro(dev_to_disk(dev), set || md->read_only);
309 static int mmc_blk_open(struct block_device *bdev, fmode_t mode)
311 struct mmc_blk_data *md = mmc_blk_get(bdev->bd_disk);
314 mutex_lock(&block_mutex);
317 if ((mode & FMODE_WRITE) && md->read_only) {
322 mutex_unlock(&block_mutex);
327 static void mmc_blk_release(struct gendisk *disk, fmode_t mode)
329 struct mmc_blk_data *md = disk->private_data;
331 mutex_lock(&block_mutex);
333 mutex_unlock(&block_mutex);
337 mmc_blk_getgeo(struct block_device *bdev, struct hd_geometry *geo)
339 geo->cylinders = get_capacity(bdev->bd_disk) / (4 * 16);
345 struct mmc_blk_ioc_data {
346 struct mmc_ioc_cmd ic;
350 #define MMC_BLK_IOC_DROP BIT(0) /* drop this mrq */
351 #define MMC_BLK_IOC_SBC BIT(1) /* use mrq.sbc */
353 struct mmc_rpmb_data *rpmb;
356 static struct mmc_blk_ioc_data *mmc_blk_ioctl_copy_from_user(
357 struct mmc_ioc_cmd __user *user)
359 struct mmc_blk_ioc_data *idata;
362 idata = kzalloc(sizeof(*idata), GFP_KERNEL);
368 if (copy_from_user(&idata->ic, user, sizeof(idata->ic))) {
373 idata->buf_bytes = (u64) idata->ic.blksz * idata->ic.blocks;
374 if (idata->buf_bytes > MMC_IOC_MAX_BYTES) {
379 if (!idata->buf_bytes) {
384 idata->buf = memdup_user((void __user *)(unsigned long)
385 idata->ic.data_ptr, idata->buf_bytes);
386 if (IS_ERR(idata->buf)) {
387 err = PTR_ERR(idata->buf);
399 static int mmc_blk_ioctl_copy_to_user(struct mmc_ioc_cmd __user *ic_ptr,
400 struct mmc_blk_ioc_data *idata)
402 struct mmc_ioc_cmd *ic = &idata->ic;
404 if (copy_to_user(&(ic_ptr->response), ic->response,
405 sizeof(ic->response)))
408 if (!idata->ic.write_flag) {
409 if (copy_to_user((void __user *)(unsigned long)ic->data_ptr,
410 idata->buf, idata->buf_bytes))
417 static int card_busy_detect(struct mmc_card *card, unsigned int timeout_ms,
420 unsigned long timeout = jiffies + msecs_to_jiffies(timeout_ms);
425 bool done = time_after(jiffies, timeout);
427 err = __mmc_send_status(card, &status, 5);
429 dev_err(mmc_dev(card->host),
430 "error %d requesting status\n", err);
434 /* Accumulate any response error bits seen */
436 *resp_errs |= status;
439 * Timeout if the device never becomes ready for data and never
440 * leaves the program state.
443 dev_err(mmc_dev(card->host),
444 "Card stuck in wrong state! %s status: %#x\n",
448 } while (!mmc_ready_for_data(status));
453 static int __mmc_blk_ioctl_cmd(struct mmc_card *card, struct mmc_blk_data *md,
454 struct mmc_blk_ioc_data **idatas, int i)
456 struct mmc_command cmd = {}, sbc = {};
457 struct mmc_data data = {};
458 struct mmc_request mrq = {};
459 struct scatterlist sg;
461 unsigned int target_part;
462 struct mmc_blk_ioc_data *idata = idatas[i];
463 struct mmc_blk_ioc_data *prev_idata = NULL;
465 if (!card || !md || !idata)
468 if (idata->flags & MMC_BLK_IOC_DROP)
471 if (idata->flags & MMC_BLK_IOC_SBC && i > 0)
472 prev_idata = idatas[i - 1];
475 * The RPMB accesses comes in from the character device, so we
476 * need to target these explicitly. Else we just target the
477 * partition type for the block device the ioctl() was issued
481 /* Support multiple RPMB partitions */
482 target_part = idata->rpmb->part_index;
483 target_part |= EXT_CSD_PART_CONFIG_ACC_RPMB;
485 target_part = md->part_type;
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;
530 err = mmc_blk_part_switch(card, target_part);
534 if (idata->ic.is_acmd) {
535 err = mmc_app_cmd(card->host, card);
540 if (idata->rpmb || prev_idata) {
541 sbc.opcode = MMC_SET_BLOCK_COUNT;
543 * We don't do any blockcount validation because the max size
544 * may be increased by a future standard. We just copy the
545 * 'Reliable Write' bit here.
547 sbc.arg = data.blocks | (idata->ic.write_flag & BIT(31));
549 sbc.arg = prev_idata->ic.arg;
550 sbc.flags = MMC_RSP_R1 | MMC_CMD_AC;
554 if ((MMC_EXTRACT_INDEX_FROM_ARG(cmd.arg) == EXT_CSD_SANITIZE_START) &&
555 (cmd.opcode == MMC_SWITCH))
556 return mmc_sanitize(card);
558 mmc_wait_for_req(card->host, &mrq);
559 memcpy(&idata->ic.response, cmd.resp, sizeof(cmd.resp));
562 memcpy(&prev_idata->ic.response, sbc.resp, sizeof(sbc.resp));
564 dev_err(mmc_dev(card->host), "%s: sbc error %d\n",
565 __func__, sbc.error);
571 dev_err(mmc_dev(card->host), "%s: cmd error %d\n",
572 __func__, cmd.error);
576 dev_err(mmc_dev(card->host), "%s: data error %d\n",
577 __func__, data.error);
582 * Make sure the cache of the PARTITION_CONFIG register and
583 * PARTITION_ACCESS bits is updated in case the ioctl ext_csd write
584 * changed it successfully.
586 if ((MMC_EXTRACT_INDEX_FROM_ARG(cmd.arg) == EXT_CSD_PART_CONFIG) &&
587 (cmd.opcode == MMC_SWITCH)) {
588 struct mmc_blk_data *main_md = dev_get_drvdata(&card->dev);
589 u8 value = MMC_EXTRACT_VALUE_FROM_ARG(cmd.arg);
592 * Update cache so the next mmc_blk_part_switch call operates
593 * on up-to-date data.
595 card->ext_csd.part_config = value;
596 main_md->part_curr = value & EXT_CSD_PART_CONFIG_ACC_MASK;
600 * Make sure to update CACHE_CTRL in case it was changed. The cache
601 * will get turned back on if the card is re-initialized, e.g.
602 * suspend/resume or hw reset in recovery.
604 if ((MMC_EXTRACT_INDEX_FROM_ARG(cmd.arg) == EXT_CSD_CACHE_CTRL) &&
605 (cmd.opcode == MMC_SWITCH)) {
606 u8 value = MMC_EXTRACT_VALUE_FROM_ARG(cmd.arg) & 1;
608 card->ext_csd.cache_ctrl = value;
612 * According to the SD specs, some commands require a delay after
613 * issuing the command.
615 if (idata->ic.postsleep_min_us)
616 usleep_range(idata->ic.postsleep_min_us, idata->ic.postsleep_max_us);
618 if (idata->rpmb || (cmd.flags & MMC_RSP_R1B) == MMC_RSP_R1B) {
620 * Ensure RPMB/R1B command has completed by polling CMD13
623 err = card_busy_detect(card, MMC_BLK_TIMEOUT_MS, NULL);
629 static int mmc_blk_ioctl_cmd(struct mmc_blk_data *md,
630 struct mmc_ioc_cmd __user *ic_ptr,
631 struct mmc_rpmb_data *rpmb)
633 struct mmc_blk_ioc_data *idata;
634 struct mmc_blk_ioc_data *idatas[1];
635 struct mmc_queue *mq;
636 struct mmc_card *card;
637 int err = 0, ioc_err = 0;
640 idata = mmc_blk_ioctl_copy_from_user(ic_ptr);
642 return PTR_ERR(idata);
643 /* This will be NULL on non-RPMB ioctl():s */
646 card = md->queue.card;
653 * Dispatch the ioctl() into the block request queue.
656 req = blk_get_request(mq->queue,
657 idata->ic.write_flag ? REQ_OP_DRV_OUT : REQ_OP_DRV_IN, 0);
663 req_to_mmc_queue_req(req)->drv_op =
664 rpmb ? MMC_DRV_OP_IOCTL_RPMB : MMC_DRV_OP_IOCTL;
665 req_to_mmc_queue_req(req)->drv_op_result = -EIO;
666 req_to_mmc_queue_req(req)->drv_op_data = idatas;
667 req_to_mmc_queue_req(req)->ioc_count = 1;
668 blk_execute_rq(mq->queue, NULL, req, 0);
669 ioc_err = req_to_mmc_queue_req(req)->drv_op_result;
670 err = mmc_blk_ioctl_copy_to_user(ic_ptr, idata);
671 blk_put_request(req);
676 return ioc_err ? ioc_err : err;
679 static int mmc_blk_ioctl_multi_cmd(struct mmc_blk_data *md,
680 struct mmc_ioc_multi_cmd __user *user,
681 struct mmc_rpmb_data *rpmb)
683 struct mmc_blk_ioc_data **idata = NULL;
684 struct mmc_ioc_cmd __user *cmds = user->cmds;
685 struct mmc_card *card;
686 struct mmc_queue *mq;
687 int i, err = 0, ioc_err = 0;
691 if (copy_from_user(&num_of_cmds, &user->num_of_cmds,
692 sizeof(num_of_cmds)))
698 if (num_of_cmds > MMC_IOC_MAX_CMDS)
701 idata = kcalloc(num_of_cmds, sizeof(*idata), GFP_KERNEL);
705 for (i = 0; i < num_of_cmds; i++) {
706 idata[i] = mmc_blk_ioctl_copy_from_user(&cmds[i]);
707 if (IS_ERR(idata[i])) {
708 err = PTR_ERR(idata[i]);
712 /* This will be NULL on non-RPMB ioctl():s */
713 idata[i]->rpmb = rpmb;
716 card = md->queue.card;
724 * Dispatch the ioctl()s into the block request queue.
727 req = blk_get_request(mq->queue,
728 idata[0]->ic.write_flag ? REQ_OP_DRV_OUT : REQ_OP_DRV_IN, 0);
733 req_to_mmc_queue_req(req)->drv_op =
734 rpmb ? MMC_DRV_OP_IOCTL_RPMB : MMC_DRV_OP_IOCTL;
735 req_to_mmc_queue_req(req)->drv_op_result = -EIO;
736 req_to_mmc_queue_req(req)->drv_op_data = idata;
737 req_to_mmc_queue_req(req)->ioc_count = num_of_cmds;
738 blk_execute_rq(mq->queue, NULL, req, 0);
739 ioc_err = req_to_mmc_queue_req(req)->drv_op_result;
741 /* copy to user if data and response */
742 for (i = 0; i < num_of_cmds && !err; i++)
743 err = mmc_blk_ioctl_copy_to_user(&cmds[i], idata[i]);
745 blk_put_request(req);
748 for (i = 0; i < num_of_cmds; i++) {
749 kfree(idata[i]->buf);
753 return ioc_err ? ioc_err : err;
756 static int mmc_blk_check_blkdev(struct block_device *bdev)
759 * The caller must have CAP_SYS_RAWIO, and must be calling this on the
760 * whole block device, not on a partition. This prevents overspray
761 * between sibling partitions.
763 if (!capable(CAP_SYS_RAWIO) || bdev_is_partition(bdev))
768 static int mmc_blk_ioctl(struct block_device *bdev, fmode_t mode,
769 unsigned int cmd, unsigned long arg)
771 struct mmc_blk_data *md;
776 ret = mmc_blk_check_blkdev(bdev);
779 md = mmc_blk_get(bdev->bd_disk);
782 ret = mmc_blk_ioctl_cmd(md,
783 (struct mmc_ioc_cmd __user *)arg,
787 case MMC_IOC_MULTI_CMD:
788 ret = mmc_blk_check_blkdev(bdev);
791 md = mmc_blk_get(bdev->bd_disk);
794 ret = mmc_blk_ioctl_multi_cmd(md,
795 (struct mmc_ioc_multi_cmd __user *)arg,
805 static int mmc_blk_compat_ioctl(struct block_device *bdev, fmode_t mode,
806 unsigned int cmd, unsigned long arg)
808 return mmc_blk_ioctl(bdev, mode, cmd, (unsigned long) compat_ptr(arg));
812 static const struct block_device_operations mmc_bdops = {
813 .open = mmc_blk_open,
814 .release = mmc_blk_release,
815 .getgeo = mmc_blk_getgeo,
816 .owner = THIS_MODULE,
817 .ioctl = mmc_blk_ioctl,
819 .compat_ioctl = mmc_blk_compat_ioctl,
823 static int mmc_blk_part_switch_pre(struct mmc_card *card,
824 unsigned int part_type)
826 const unsigned int mask = EXT_CSD_PART_CONFIG_ACC_MASK;
827 const unsigned int rpmb = EXT_CSD_PART_CONFIG_ACC_RPMB;
830 if ((part_type & mask) == rpmb) {
831 if (card->ext_csd.cmdq_en) {
832 ret = mmc_cmdq_disable(card);
836 mmc_retune_pause(card->host);
842 static int mmc_blk_part_switch_post(struct mmc_card *card,
843 unsigned int part_type)
845 const unsigned int mask = EXT_CSD_PART_CONFIG_ACC_MASK;
846 const unsigned int rpmb = EXT_CSD_PART_CONFIG_ACC_RPMB;
849 if ((part_type & mask) == rpmb) {
850 mmc_retune_unpause(card->host);
851 if (card->reenable_cmdq && !card->ext_csd.cmdq_en)
852 ret = mmc_cmdq_enable(card);
858 static inline int mmc_blk_part_switch(struct mmc_card *card,
859 unsigned int part_type)
862 struct mmc_blk_data *main_md = dev_get_drvdata(&card->dev);
864 if (main_md->part_curr == part_type)
867 if (mmc_card_mmc(card)) {
868 u8 part_config = card->ext_csd.part_config;
870 ret = mmc_blk_part_switch_pre(card, part_type);
874 part_config &= ~EXT_CSD_PART_CONFIG_ACC_MASK;
875 part_config |= part_type;
877 ret = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
878 EXT_CSD_PART_CONFIG, part_config,
879 card->ext_csd.part_time);
881 mmc_blk_part_switch_post(card, part_type);
885 card->ext_csd.part_config = part_config;
887 ret = mmc_blk_part_switch_post(card, main_md->part_curr);
890 main_md->part_curr = part_type;
894 static int mmc_sd_num_wr_blocks(struct mmc_card *card, u32 *written_blocks)
900 struct mmc_request mrq = {};
901 struct mmc_command cmd = {};
902 struct mmc_data data = {};
904 struct scatterlist sg;
906 cmd.opcode = MMC_APP_CMD;
907 cmd.arg = card->rca << 16;
908 cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC;
910 err = mmc_wait_for_cmd(card->host, &cmd, 0);
913 if (!mmc_host_is_spi(card->host) && !(cmd.resp[0] & R1_APP_CMD))
916 memset(&cmd, 0, sizeof(struct mmc_command));
918 cmd.opcode = SD_APP_SEND_NUM_WR_BLKS;
920 cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC;
924 data.flags = MMC_DATA_READ;
927 mmc_set_data_timeout(&data, card);
932 blocks = kmalloc(4, GFP_KERNEL);
936 sg_init_one(&sg, blocks, 4);
938 mmc_wait_for_req(card->host, &mrq);
940 result = ntohl(*blocks);
943 if (cmd.error || data.error)
946 *written_blocks = result;
951 static unsigned int mmc_blk_clock_khz(struct mmc_host *host)
953 if (host->actual_clock)
954 return host->actual_clock / 1000;
956 /* Clock may be subject to a divisor, fudge it by a factor of 2. */
958 return host->ios.clock / 2000;
960 /* How can there be no clock */
962 return 100; /* 100 kHz is minimum possible value */
965 static unsigned int mmc_blk_data_timeout_ms(struct mmc_host *host,
966 struct mmc_data *data)
968 unsigned int ms = DIV_ROUND_UP(data->timeout_ns, 1000000);
971 if (data->timeout_clks) {
972 khz = mmc_blk_clock_khz(host);
973 ms += DIV_ROUND_UP(data->timeout_clks, khz);
979 static int mmc_blk_reset(struct mmc_blk_data *md, struct mmc_host *host,
984 if (md->reset_done & type)
987 md->reset_done |= type;
988 err = mmc_hw_reset(host);
989 /* Ensure we switch back to the correct partition */
990 if (err != -EOPNOTSUPP) {
991 struct mmc_blk_data *main_md =
992 dev_get_drvdata(&host->card->dev);
995 main_md->part_curr = main_md->part_type;
996 part_err = mmc_blk_part_switch(host->card, md->part_type);
999 * We have failed to get back into the correct
1000 * partition, so we need to abort the whole request.
1008 static inline void mmc_blk_reset_success(struct mmc_blk_data *md, int type)
1010 md->reset_done &= ~type;
1013 static void mmc_blk_check_sbc(struct mmc_queue_req *mq_rq)
1015 struct mmc_blk_ioc_data **idata = mq_rq->drv_op_data;
1018 for (i = 1; i < mq_rq->ioc_count; i++) {
1019 if (idata[i - 1]->ic.opcode == MMC_SET_BLOCK_COUNT &&
1020 mmc_op_multi(idata[i]->ic.opcode)) {
1021 idata[i - 1]->flags |= MMC_BLK_IOC_DROP;
1022 idata[i]->flags |= MMC_BLK_IOC_SBC;
1028 * The non-block commands come back from the block layer after it queued it and
1029 * processed it with all other requests and then they get issued in this
1032 static void mmc_blk_issue_drv_op(struct mmc_queue *mq, struct request *req)
1034 struct mmc_queue_req *mq_rq;
1035 struct mmc_card *card = mq->card;
1036 struct mmc_blk_data *md = mq->blkdata;
1037 struct mmc_blk_ioc_data **idata;
1044 mq_rq = req_to_mmc_queue_req(req);
1045 rpmb_ioctl = (mq_rq->drv_op == MMC_DRV_OP_IOCTL_RPMB);
1047 switch (mq_rq->drv_op) {
1048 case MMC_DRV_OP_IOCTL:
1049 if (card->ext_csd.cmdq_en) {
1050 ret = mmc_cmdq_disable(card);
1055 mmc_blk_check_sbc(mq_rq);
1058 case MMC_DRV_OP_IOCTL_RPMB:
1059 idata = mq_rq->drv_op_data;
1060 for (i = 0, ret = 0; i < mq_rq->ioc_count; i++) {
1061 ret = __mmc_blk_ioctl_cmd(card, md, idata, i);
1065 /* Always switch back to main area after RPMB access */
1067 mmc_blk_part_switch(card, 0);
1068 else if (card->reenable_cmdq && !card->ext_csd.cmdq_en)
1069 mmc_cmdq_enable(card);
1071 case MMC_DRV_OP_BOOT_WP:
1072 ret = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_BOOT_WP,
1073 card->ext_csd.boot_ro_lock |
1074 EXT_CSD_BOOT_WP_B_PWR_WP_EN,
1075 card->ext_csd.part_time);
1077 pr_err("%s: Locking boot partition ro until next power on failed: %d\n",
1078 md->disk->disk_name, ret);
1080 card->ext_csd.boot_ro_lock |=
1081 EXT_CSD_BOOT_WP_B_PWR_WP_EN;
1083 case MMC_DRV_OP_GET_CARD_STATUS:
1084 ret = mmc_send_status(card, &status);
1088 case MMC_DRV_OP_GET_EXT_CSD:
1089 ext_csd = mq_rq->drv_op_data;
1090 ret = mmc_get_ext_csd(card, ext_csd);
1093 pr_err("%s: unknown driver specific operation\n",
1094 md->disk->disk_name);
1098 mq_rq->drv_op_result = ret;
1099 blk_mq_end_request(req, ret ? BLK_STS_IOERR : BLK_STS_OK);
1102 static void mmc_blk_issue_discard_rq(struct mmc_queue *mq, struct request *req)
1104 struct mmc_blk_data *md = mq->blkdata;
1105 struct mmc_card *card = md->queue.card;
1106 unsigned int from, nr;
1107 int err = 0, type = MMC_BLK_DISCARD;
1108 blk_status_t status = BLK_STS_OK;
1110 if (!mmc_can_erase(card)) {
1111 status = BLK_STS_NOTSUPP;
1115 from = blk_rq_pos(req);
1116 nr = blk_rq_sectors(req);
1119 unsigned int erase_arg = card->erase_arg;
1121 if (mmc_card_broken_sd_discard(card))
1122 erase_arg = SD_ERASE_ARG;
1125 if (card->quirks & MMC_QUIRK_INAND_CMD38) {
1126 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1127 INAND_CMD38_ARG_EXT_CSD,
1128 card->erase_arg == MMC_TRIM_ARG ?
1129 INAND_CMD38_ARG_TRIM :
1130 INAND_CMD38_ARG_ERASE,
1131 card->ext_csd.generic_cmd6_time);
1134 err = mmc_erase(card, from, nr, erase_arg);
1135 } while (err == -EIO && !mmc_blk_reset(md, card->host, type));
1137 status = BLK_STS_IOERR;
1139 mmc_blk_reset_success(md, type);
1141 blk_mq_end_request(req, status);
1144 static void mmc_blk_issue_secdiscard_rq(struct mmc_queue *mq,
1145 struct request *req)
1147 struct mmc_blk_data *md = mq->blkdata;
1148 struct mmc_card *card = md->queue.card;
1149 unsigned int from, nr, arg;
1150 int err = 0, type = MMC_BLK_SECDISCARD;
1151 blk_status_t status = BLK_STS_OK;
1153 if (!(mmc_can_secure_erase_trim(card))) {
1154 status = BLK_STS_NOTSUPP;
1158 from = blk_rq_pos(req);
1159 nr = blk_rq_sectors(req);
1161 if (mmc_can_trim(card) && !mmc_erase_group_aligned(card, from, nr))
1162 arg = MMC_SECURE_TRIM1_ARG;
1164 arg = MMC_SECURE_ERASE_ARG;
1167 if (card->quirks & MMC_QUIRK_INAND_CMD38) {
1168 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1169 INAND_CMD38_ARG_EXT_CSD,
1170 arg == MMC_SECURE_TRIM1_ARG ?
1171 INAND_CMD38_ARG_SECTRIM1 :
1172 INAND_CMD38_ARG_SECERASE,
1173 card->ext_csd.generic_cmd6_time);
1178 err = mmc_erase(card, from, nr, arg);
1182 status = BLK_STS_IOERR;
1186 if (arg == MMC_SECURE_TRIM1_ARG) {
1187 if (card->quirks & MMC_QUIRK_INAND_CMD38) {
1188 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1189 INAND_CMD38_ARG_EXT_CSD,
1190 INAND_CMD38_ARG_SECTRIM2,
1191 card->ext_csd.generic_cmd6_time);
1196 err = mmc_erase(card, from, nr, MMC_SECURE_TRIM2_ARG);
1200 status = BLK_STS_IOERR;
1206 if (err && !mmc_blk_reset(md, card->host, type))
1209 mmc_blk_reset_success(md, type);
1211 blk_mq_end_request(req, status);
1214 static void mmc_blk_issue_flush(struct mmc_queue *mq, struct request *req)
1216 struct mmc_blk_data *md = mq->blkdata;
1217 struct mmc_card *card = md->queue.card;
1220 ret = mmc_flush_cache(card);
1221 blk_mq_end_request(req, ret ? BLK_STS_IOERR : BLK_STS_OK);
1225 * Reformat current write as a reliable write, supporting
1226 * both legacy and the enhanced reliable write MMC cards.
1227 * In each transfer we'll handle only as much as a single
1228 * reliable write can handle, thus finish the request in
1229 * partial completions.
1231 static inline void mmc_apply_rel_rw(struct mmc_blk_request *brq,
1232 struct mmc_card *card,
1233 struct request *req)
1235 if (!(card->ext_csd.rel_param & EXT_CSD_WR_REL_PARAM_EN)) {
1236 /* Legacy mode imposes restrictions on transfers. */
1237 if (!IS_ALIGNED(blk_rq_pos(req), card->ext_csd.rel_sectors))
1238 brq->data.blocks = 1;
1240 if (brq->data.blocks > card->ext_csd.rel_sectors)
1241 brq->data.blocks = card->ext_csd.rel_sectors;
1242 else if (brq->data.blocks < card->ext_csd.rel_sectors)
1243 brq->data.blocks = 1;
1247 #define CMD_ERRORS_EXCL_OOR \
1248 (R1_ADDRESS_ERROR | /* Misaligned address */ \
1249 R1_BLOCK_LEN_ERROR | /* Transferred block length incorrect */\
1250 R1_WP_VIOLATION | /* Tried to write to protected block */ \
1251 R1_CARD_ECC_FAILED | /* Card ECC failed */ \
1252 R1_CC_ERROR | /* Card controller error */ \
1253 R1_ERROR) /* General/unknown error */
1255 #define CMD_ERRORS \
1256 (CMD_ERRORS_EXCL_OOR | \
1257 R1_OUT_OF_RANGE) /* Command argument out of range */ \
1259 static void mmc_blk_eval_resp_error(struct mmc_blk_request *brq)
1264 * Per the SD specification(physical layer version 4.10)[1],
1265 * section 4.3.3, it explicitly states that "When the last
1266 * block of user area is read using CMD18, the host should
1267 * ignore OUT_OF_RANGE error that may occur even the sequence
1268 * is correct". And JESD84-B51 for eMMC also has a similar
1269 * statement on section 6.8.3.
1271 * Multiple block read/write could be done by either predefined
1272 * method, namely CMD23, or open-ending mode. For open-ending mode,
1273 * we should ignore the OUT_OF_RANGE error as it's normal behaviour.
1275 * However the spec[1] doesn't tell us whether we should also
1276 * ignore that for predefined method. But per the spec[1], section
1277 * 4.15 Set Block Count Command, it says"If illegal block count
1278 * is set, out of range error will be indicated during read/write
1279 * operation (For example, data transfer is stopped at user area
1280 * boundary)." In another word, we could expect a out of range error
1281 * in the response for the following CMD18/25. And if argument of
1282 * CMD23 + the argument of CMD18/25 exceed the max number of blocks,
1283 * we could also expect to get a -ETIMEDOUT or any error number from
1284 * the host drivers due to missing data response(for write)/data(for
1285 * read), as the cards will stop the data transfer by itself per the
1286 * spec. So we only need to check R1_OUT_OF_RANGE for open-ending mode.
1289 if (!brq->stop.error) {
1290 bool oor_with_open_end;
1291 /* If there is no error yet, check R1 response */
1293 val = brq->stop.resp[0] & CMD_ERRORS;
1294 oor_with_open_end = val & R1_OUT_OF_RANGE && !brq->mrq.sbc;
1296 if (val && !oor_with_open_end)
1297 brq->stop.error = -EIO;
1301 static void mmc_blk_data_prep(struct mmc_queue *mq, struct mmc_queue_req *mqrq,
1302 int recovery_mode, bool *do_rel_wr_p,
1303 bool *do_data_tag_p)
1305 struct mmc_blk_data *md = mq->blkdata;
1306 struct mmc_card *card = md->queue.card;
1307 struct mmc_blk_request *brq = &mqrq->brq;
1308 struct request *req = mmc_queue_req_to_req(mqrq);
1309 bool do_rel_wr, do_data_tag;
1312 * Reliable writes are used to implement Forced Unit Access and
1313 * are supported only on MMCs.
1315 do_rel_wr = (req->cmd_flags & REQ_FUA) &&
1316 rq_data_dir(req) == WRITE &&
1317 (md->flags & MMC_BLK_REL_WR);
1319 memset(brq, 0, sizeof(struct mmc_blk_request));
1321 brq->mrq.data = &brq->data;
1322 brq->mrq.tag = req->tag;
1324 brq->stop.opcode = MMC_STOP_TRANSMISSION;
1327 if (rq_data_dir(req) == READ) {
1328 brq->data.flags = MMC_DATA_READ;
1329 brq->stop.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC;
1331 brq->data.flags = MMC_DATA_WRITE;
1332 brq->stop.flags = MMC_RSP_SPI_R1B | MMC_RSP_R1B | MMC_CMD_AC;
1335 brq->data.blksz = 512;
1336 brq->data.blocks = blk_rq_sectors(req);
1337 brq->data.blk_addr = blk_rq_pos(req);
1340 * The command queue supports 2 priorities: "high" (1) and "simple" (0).
1341 * The eMMC will give "high" priority tasks priority over "simple"
1342 * priority tasks. Here we always set "simple" priority by not setting
1347 * The block layer doesn't support all sector count
1348 * restrictions, so we need to be prepared for too big
1351 if (brq->data.blocks > card->host->max_blk_count)
1352 brq->data.blocks = card->host->max_blk_count;
1354 if (brq->data.blocks > 1) {
1356 * Some SD cards in SPI mode return a CRC error or even lock up
1357 * completely when trying to read the last block using a
1358 * multiblock read command.
1360 if (mmc_host_is_spi(card->host) && (rq_data_dir(req) == READ) &&
1361 (blk_rq_pos(req) + blk_rq_sectors(req) ==
1362 get_capacity(md->disk)))
1366 * After a read error, we redo the request one (native) sector
1367 * at a time in order to accurately determine which
1368 * sectors can be read successfully.
1371 brq->data.blocks = queue_physical_block_size(mq->queue) >> 9;
1374 * Some controllers have HW issues while operating
1375 * in multiple I/O mode
1377 if (card->host->ops->multi_io_quirk)
1378 brq->data.blocks = card->host->ops->multi_io_quirk(card,
1379 (rq_data_dir(req) == READ) ?
1380 MMC_DATA_READ : MMC_DATA_WRITE,
1385 mmc_apply_rel_rw(brq, card, req);
1386 brq->data.flags |= MMC_DATA_REL_WR;
1390 * Data tag is used only during writing meta data to speed
1391 * up write and any subsequent read of this meta data
1393 do_data_tag = card->ext_csd.data_tag_unit_size &&
1394 (req->cmd_flags & REQ_META) &&
1395 (rq_data_dir(req) == WRITE) &&
1396 ((brq->data.blocks * brq->data.blksz) >=
1397 card->ext_csd.data_tag_unit_size);
1400 brq->data.flags |= MMC_DATA_DAT_TAG;
1402 mmc_set_data_timeout(&brq->data, card);
1404 brq->data.sg = mqrq->sg;
1405 brq->data.sg_len = mmc_queue_map_sg(mq, mqrq);
1408 * Adjust the sg list so it is the same size as the
1411 if (brq->data.blocks != blk_rq_sectors(req)) {
1412 int i, data_size = brq->data.blocks << 9;
1413 struct scatterlist *sg;
1415 for_each_sg(brq->data.sg, sg, brq->data.sg_len, i) {
1416 data_size -= sg->length;
1417 if (data_size <= 0) {
1418 sg->length += data_size;
1423 brq->data.sg_len = i;
1427 *do_rel_wr_p = do_rel_wr;
1430 *do_data_tag_p = do_data_tag;
1433 #define MMC_CQE_RETRIES 2
1435 static void mmc_blk_cqe_complete_rq(struct mmc_queue *mq, struct request *req)
1437 struct mmc_queue_req *mqrq = req_to_mmc_queue_req(req);
1438 struct mmc_request *mrq = &mqrq->brq.mrq;
1439 struct request_queue *q = req->q;
1440 struct mmc_host *host = mq->card->host;
1441 enum mmc_issue_type issue_type = mmc_issue_type(mq, req);
1442 unsigned long flags;
1446 mmc_cqe_post_req(host, mrq);
1448 if (mrq->cmd && mrq->cmd->error)
1449 err = mrq->cmd->error;
1450 else if (mrq->data && mrq->data->error)
1451 err = mrq->data->error;
1456 if (mqrq->retries++ < MMC_CQE_RETRIES)
1457 blk_mq_requeue_request(req, true);
1459 blk_mq_end_request(req, BLK_STS_IOERR);
1460 } else if (mrq->data) {
1461 if (blk_update_request(req, BLK_STS_OK, mrq->data->bytes_xfered))
1462 blk_mq_requeue_request(req, true);
1464 __blk_mq_end_request(req, BLK_STS_OK);
1465 } else if (mq->in_recovery) {
1466 blk_mq_requeue_request(req, true);
1468 blk_mq_end_request(req, BLK_STS_OK);
1471 spin_lock_irqsave(&mq->lock, flags);
1473 mq->in_flight[issue_type] -= 1;
1475 put_card = (mmc_tot_in_flight(mq) == 0);
1477 mmc_cqe_check_busy(mq);
1479 spin_unlock_irqrestore(&mq->lock, flags);
1482 blk_mq_run_hw_queues(q, true);
1485 mmc_put_card(mq->card, &mq->ctx);
1488 void mmc_blk_cqe_recovery(struct mmc_queue *mq)
1490 struct mmc_card *card = mq->card;
1491 struct mmc_host *host = card->host;
1494 pr_debug("%s: CQE recovery start\n", mmc_hostname(host));
1496 err = mmc_cqe_recovery(host);
1498 mmc_blk_reset(mq->blkdata, host, MMC_BLK_CQE_RECOVERY);
1499 mmc_blk_reset_success(mq->blkdata, MMC_BLK_CQE_RECOVERY);
1501 pr_debug("%s: CQE recovery done\n", mmc_hostname(host));
1504 static void mmc_blk_cqe_req_done(struct mmc_request *mrq)
1506 struct mmc_queue_req *mqrq = container_of(mrq, struct mmc_queue_req,
1508 struct request *req = mmc_queue_req_to_req(mqrq);
1509 struct request_queue *q = req->q;
1510 struct mmc_queue *mq = q->queuedata;
1513 * Block layer timeouts race with completions which means the normal
1514 * completion path cannot be used during recovery.
1516 if (mq->in_recovery)
1517 mmc_blk_cqe_complete_rq(mq, req);
1518 else if (likely(!blk_should_fake_timeout(req->q)))
1519 blk_mq_complete_request(req);
1522 static int mmc_blk_cqe_start_req(struct mmc_host *host, struct mmc_request *mrq)
1524 mrq->done = mmc_blk_cqe_req_done;
1525 mrq->recovery_notifier = mmc_cqe_recovery_notifier;
1527 return mmc_cqe_start_req(host, mrq);
1530 static struct mmc_request *mmc_blk_cqe_prep_dcmd(struct mmc_queue_req *mqrq,
1531 struct request *req)
1533 struct mmc_blk_request *brq = &mqrq->brq;
1535 memset(brq, 0, sizeof(*brq));
1537 brq->mrq.cmd = &brq->cmd;
1538 brq->mrq.tag = req->tag;
1543 static int mmc_blk_cqe_issue_flush(struct mmc_queue *mq, struct request *req)
1545 struct mmc_queue_req *mqrq = req_to_mmc_queue_req(req);
1546 struct mmc_request *mrq = mmc_blk_cqe_prep_dcmd(mqrq, req);
1548 mrq->cmd->opcode = MMC_SWITCH;
1549 mrq->cmd->arg = (MMC_SWITCH_MODE_WRITE_BYTE << 24) |
1550 (EXT_CSD_FLUSH_CACHE << 16) |
1552 EXT_CSD_CMD_SET_NORMAL;
1553 mrq->cmd->flags = MMC_CMD_AC | MMC_RSP_R1B;
1555 return mmc_blk_cqe_start_req(mq->card->host, mrq);
1558 static int mmc_blk_hsq_issue_rw_rq(struct mmc_queue *mq, struct request *req)
1560 struct mmc_queue_req *mqrq = req_to_mmc_queue_req(req);
1561 struct mmc_host *host = mq->card->host;
1564 mmc_blk_rw_rq_prep(mqrq, mq->card, 0, mq);
1565 mqrq->brq.mrq.done = mmc_blk_hsq_req_done;
1566 mmc_pre_req(host, &mqrq->brq.mrq);
1568 err = mmc_cqe_start_req(host, &mqrq->brq.mrq);
1570 mmc_post_req(host, &mqrq->brq.mrq, err);
1575 static int mmc_blk_cqe_issue_rw_rq(struct mmc_queue *mq, struct request *req)
1577 struct mmc_queue_req *mqrq = req_to_mmc_queue_req(req);
1578 struct mmc_host *host = mq->card->host;
1580 if (host->hsq_enabled)
1581 return mmc_blk_hsq_issue_rw_rq(mq, req);
1583 mmc_blk_data_prep(mq, mqrq, 0, NULL, NULL);
1585 return mmc_blk_cqe_start_req(mq->card->host, &mqrq->brq.mrq);
1588 static void mmc_blk_rw_rq_prep(struct mmc_queue_req *mqrq,
1589 struct mmc_card *card,
1591 struct mmc_queue *mq)
1593 u32 readcmd, writecmd;
1594 struct mmc_blk_request *brq = &mqrq->brq;
1595 struct request *req = mmc_queue_req_to_req(mqrq);
1596 struct mmc_blk_data *md = mq->blkdata;
1597 bool do_rel_wr, do_data_tag;
1599 mmc_blk_data_prep(mq, mqrq, recovery_mode, &do_rel_wr, &do_data_tag);
1601 brq->mrq.cmd = &brq->cmd;
1603 brq->cmd.arg = blk_rq_pos(req);
1604 if (!mmc_card_blockaddr(card))
1606 brq->cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC;
1608 if (brq->data.blocks > 1 || do_rel_wr) {
1609 /* SPI multiblock writes terminate using a special
1610 * token, not a STOP_TRANSMISSION request.
1612 if (!mmc_host_is_spi(card->host) ||
1613 rq_data_dir(req) == READ)
1614 brq->mrq.stop = &brq->stop;
1615 readcmd = MMC_READ_MULTIPLE_BLOCK;
1616 writecmd = MMC_WRITE_MULTIPLE_BLOCK;
1618 brq->mrq.stop = NULL;
1619 readcmd = MMC_READ_SINGLE_BLOCK;
1620 writecmd = MMC_WRITE_BLOCK;
1622 brq->cmd.opcode = rq_data_dir(req) == READ ? readcmd : writecmd;
1625 * Pre-defined multi-block transfers are preferable to
1626 * open ended-ones (and necessary for reliable writes).
1627 * However, it is not sufficient to just send CMD23,
1628 * and avoid the final CMD12, as on an error condition
1629 * CMD12 (stop) needs to be sent anyway. This, coupled
1630 * with Auto-CMD23 enhancements provided by some
1631 * hosts, means that the complexity of dealing
1632 * with this is best left to the host. If CMD23 is
1633 * supported by card and host, we'll fill sbc in and let
1634 * the host deal with handling it correctly. This means
1635 * that for hosts that don't expose MMC_CAP_CMD23, no
1636 * change of behavior will be observed.
1638 * N.B: Some MMC cards experience perf degradation.
1639 * We'll avoid using CMD23-bounded multiblock writes for
1640 * these, while retaining features like reliable writes.
1642 if ((md->flags & MMC_BLK_CMD23) && mmc_op_multi(brq->cmd.opcode) &&
1643 (do_rel_wr || !(card->quirks & MMC_QUIRK_BLK_NO_CMD23) ||
1645 brq->sbc.opcode = MMC_SET_BLOCK_COUNT;
1646 brq->sbc.arg = brq->data.blocks |
1647 (do_rel_wr ? (1 << 31) : 0) |
1648 (do_data_tag ? (1 << 29) : 0);
1649 brq->sbc.flags = MMC_RSP_R1 | MMC_CMD_AC;
1650 brq->mrq.sbc = &brq->sbc;
1654 #define MMC_MAX_RETRIES 5
1655 #define MMC_DATA_RETRIES 2
1656 #define MMC_NO_RETRIES (MMC_MAX_RETRIES + 1)
1658 static int mmc_blk_send_stop(struct mmc_card *card, unsigned int timeout)
1660 struct mmc_command cmd = {
1661 .opcode = MMC_STOP_TRANSMISSION,
1662 .flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC,
1663 /* Some hosts wait for busy anyway, so provide a busy timeout */
1664 .busy_timeout = timeout,
1667 return mmc_wait_for_cmd(card->host, &cmd, 5);
1670 static int mmc_blk_fix_state(struct mmc_card *card, struct request *req)
1672 struct mmc_queue_req *mqrq = req_to_mmc_queue_req(req);
1673 struct mmc_blk_request *brq = &mqrq->brq;
1674 unsigned int timeout = mmc_blk_data_timeout_ms(card->host, &brq->data);
1677 mmc_retune_hold_now(card->host);
1679 mmc_blk_send_stop(card, timeout);
1681 err = card_busy_detect(card, timeout, NULL);
1683 mmc_retune_release(card->host);
1688 #define MMC_READ_SINGLE_RETRIES 2
1690 /* Single (native) sector read during recovery */
1691 static void mmc_blk_read_single(struct mmc_queue *mq, struct request *req)
1693 struct mmc_queue_req *mqrq = req_to_mmc_queue_req(req);
1694 struct mmc_request *mrq = &mqrq->brq.mrq;
1695 struct mmc_card *card = mq->card;
1696 struct mmc_host *host = card->host;
1697 blk_status_t error = BLK_STS_OK;
1698 size_t bytes_per_read = queue_physical_block_size(mq->queue);
1705 while (retries++ <= MMC_READ_SINGLE_RETRIES) {
1706 mmc_blk_rw_rq_prep(mqrq, card, 1, mq);
1708 mmc_wait_for_req(host, mrq);
1710 err = mmc_send_status(card, &status);
1714 if (!mmc_host_is_spi(host) &&
1715 !mmc_ready_for_data(status)) {
1716 err = mmc_blk_fix_state(card, req);
1721 if (!mrq->cmd->error)
1725 if (mrq->cmd->error ||
1727 (!mmc_host_is_spi(host) &&
1728 (mrq->cmd->resp[0] & CMD_ERRORS || status & CMD_ERRORS)))
1729 error = BLK_STS_IOERR;
1733 } while (blk_update_request(req, error, bytes_per_read));
1738 mrq->data->bytes_xfered = 0;
1739 blk_update_request(req, BLK_STS_IOERR, bytes_per_read);
1740 /* Let it try the remaining request again */
1741 if (mqrq->retries > MMC_MAX_RETRIES - 1)
1742 mqrq->retries = MMC_MAX_RETRIES - 1;
1745 static inline bool mmc_blk_oor_valid(struct mmc_blk_request *brq)
1747 return !!brq->mrq.sbc;
1750 static inline u32 mmc_blk_stop_err_bits(struct mmc_blk_request *brq)
1752 return mmc_blk_oor_valid(brq) ? CMD_ERRORS : CMD_ERRORS_EXCL_OOR;
1756 * Check for errors the host controller driver might not have seen such as
1757 * response mode errors or invalid card state.
1759 static bool mmc_blk_status_error(struct request *req, u32 status)
1761 struct mmc_queue_req *mqrq = req_to_mmc_queue_req(req);
1762 struct mmc_blk_request *brq = &mqrq->brq;
1763 struct mmc_queue *mq = req->q->queuedata;
1766 if (mmc_host_is_spi(mq->card->host))
1769 stop_err_bits = mmc_blk_stop_err_bits(brq);
1771 return brq->cmd.resp[0] & CMD_ERRORS ||
1772 brq->stop.resp[0] & stop_err_bits ||
1773 status & stop_err_bits ||
1774 (rq_data_dir(req) == WRITE && !mmc_ready_for_data(status));
1777 static inline bool mmc_blk_cmd_started(struct mmc_blk_request *brq)
1779 return !brq->sbc.error && !brq->cmd.error &&
1780 !(brq->cmd.resp[0] & CMD_ERRORS);
1784 * Requests are completed by mmc_blk_mq_complete_rq() which sets simple
1786 * 1. A request that has transferred at least some data is considered
1787 * successful and will be requeued if there is remaining data to
1789 * 2. Otherwise the number of retries is incremented and the request
1790 * will be requeued if there are remaining retries.
1791 * 3. Otherwise the request will be errored out.
1792 * That means mmc_blk_mq_complete_rq() is controlled by bytes_xfered and
1793 * mqrq->retries. So there are only 4 possible actions here:
1794 * 1. do not accept the bytes_xfered value i.e. set it to zero
1795 * 2. change mqrq->retries to determine the number of retries
1796 * 3. try to reset the card
1797 * 4. read one sector at a time
1799 static void mmc_blk_mq_rw_recovery(struct mmc_queue *mq, struct request *req)
1801 int type = rq_data_dir(req) == READ ? MMC_BLK_READ : MMC_BLK_WRITE;
1802 struct mmc_queue_req *mqrq = req_to_mmc_queue_req(req);
1803 struct mmc_blk_request *brq = &mqrq->brq;
1804 struct mmc_blk_data *md = mq->blkdata;
1805 struct mmc_card *card = mq->card;
1811 * Some errors the host driver might not have seen. Set the number of
1812 * bytes transferred to zero in that case.
1814 err = __mmc_send_status(card, &status, 0);
1815 if (err || mmc_blk_status_error(req, status))
1816 brq->data.bytes_xfered = 0;
1818 mmc_retune_release(card->host);
1821 * Try again to get the status. This also provides an opportunity for
1825 err = __mmc_send_status(card, &status, 0);
1828 * Nothing more to do after the number of bytes transferred has been
1829 * updated and there is no card.
1831 if (err && mmc_detect_card_removed(card->host))
1834 /* Try to get back to "tran" state */
1835 if (!mmc_host_is_spi(mq->card->host) &&
1836 (err || !mmc_ready_for_data(status)))
1837 err = mmc_blk_fix_state(mq->card, req);
1840 * Special case for SD cards where the card might record the number of
1843 if (!err && mmc_blk_cmd_started(brq) && mmc_card_sd(card) &&
1844 rq_data_dir(req) == WRITE) {
1845 if (mmc_sd_num_wr_blocks(card, &blocks))
1846 brq->data.bytes_xfered = 0;
1848 brq->data.bytes_xfered = blocks << 9;
1851 /* Reset if the card is in a bad state */
1852 if (!mmc_host_is_spi(mq->card->host) &&
1853 err && mmc_blk_reset(md, card->host, type)) {
1854 pr_err("%s: recovery failed!\n", req->rq_disk->disk_name);
1855 mqrq->retries = MMC_NO_RETRIES;
1860 * If anything was done, just return and if there is anything remaining
1861 * on the request it will get requeued.
1863 if (brq->data.bytes_xfered)
1866 /* Reset before last retry */
1867 if (mqrq->retries + 1 == MMC_MAX_RETRIES)
1868 mmc_blk_reset(md, card->host, type);
1870 /* Command errors fail fast, so use all MMC_MAX_RETRIES */
1871 if (brq->sbc.error || brq->cmd.error)
1874 /* Reduce the remaining retries for data errors */
1875 if (mqrq->retries < MMC_MAX_RETRIES - MMC_DATA_RETRIES) {
1876 mqrq->retries = MMC_MAX_RETRIES - MMC_DATA_RETRIES;
1880 if (rq_data_dir(req) == READ && brq->data.blocks >
1881 queue_physical_block_size(mq->queue) >> 9) {
1882 /* Read one (native) sector at a time */
1883 mmc_blk_read_single(mq, req);
1888 static inline bool mmc_blk_rq_error(struct mmc_blk_request *brq)
1890 mmc_blk_eval_resp_error(brq);
1892 return brq->sbc.error || brq->cmd.error || brq->stop.error ||
1893 brq->data.error || brq->cmd.resp[0] & CMD_ERRORS;
1896 static int mmc_blk_card_busy(struct mmc_card *card, struct request *req)
1898 struct mmc_queue_req *mqrq = req_to_mmc_queue_req(req);
1902 if (mmc_host_is_spi(card->host) || rq_data_dir(req) == READ)
1905 err = card_busy_detect(card, MMC_BLK_TIMEOUT_MS, &status);
1908 * Do not assume data transferred correctly if there are any error bits
1911 if (status & mmc_blk_stop_err_bits(&mqrq->brq)) {
1912 mqrq->brq.data.bytes_xfered = 0;
1913 err = err ? err : -EIO;
1916 /* Copy the exception bit so it will be seen later on */
1917 if (mmc_card_mmc(card) && status & R1_EXCEPTION_EVENT)
1918 mqrq->brq.cmd.resp[0] |= R1_EXCEPTION_EVENT;
1923 static inline void mmc_blk_rw_reset_success(struct mmc_queue *mq,
1924 struct request *req)
1926 int type = rq_data_dir(req) == READ ? MMC_BLK_READ : MMC_BLK_WRITE;
1928 mmc_blk_reset_success(mq->blkdata, type);
1931 static void mmc_blk_mq_complete_rq(struct mmc_queue *mq, struct request *req)
1933 struct mmc_queue_req *mqrq = req_to_mmc_queue_req(req);
1934 unsigned int nr_bytes = mqrq->brq.data.bytes_xfered;
1937 if (blk_update_request(req, BLK_STS_OK, nr_bytes))
1938 blk_mq_requeue_request(req, true);
1940 __blk_mq_end_request(req, BLK_STS_OK);
1941 } else if (!blk_rq_bytes(req)) {
1942 __blk_mq_end_request(req, BLK_STS_IOERR);
1943 } else if (mqrq->retries++ < MMC_MAX_RETRIES) {
1944 blk_mq_requeue_request(req, true);
1946 if (mmc_card_removed(mq->card))
1947 req->rq_flags |= RQF_QUIET;
1948 blk_mq_end_request(req, BLK_STS_IOERR);
1952 static bool mmc_blk_urgent_bkops_needed(struct mmc_queue *mq,
1953 struct mmc_queue_req *mqrq)
1955 return mmc_card_mmc(mq->card) && !mmc_host_is_spi(mq->card->host) &&
1956 (mqrq->brq.cmd.resp[0] & R1_EXCEPTION_EVENT ||
1957 mqrq->brq.stop.resp[0] & R1_EXCEPTION_EVENT);
1960 static void mmc_blk_urgent_bkops(struct mmc_queue *mq,
1961 struct mmc_queue_req *mqrq)
1963 if (mmc_blk_urgent_bkops_needed(mq, mqrq))
1964 mmc_run_bkops(mq->card);
1967 static void mmc_blk_hsq_req_done(struct mmc_request *mrq)
1969 struct mmc_queue_req *mqrq =
1970 container_of(mrq, struct mmc_queue_req, brq.mrq);
1971 struct request *req = mmc_queue_req_to_req(mqrq);
1972 struct request_queue *q = req->q;
1973 struct mmc_queue *mq = q->queuedata;
1974 struct mmc_host *host = mq->card->host;
1975 unsigned long flags;
1977 if (mmc_blk_rq_error(&mqrq->brq) ||
1978 mmc_blk_urgent_bkops_needed(mq, mqrq)) {
1979 spin_lock_irqsave(&mq->lock, flags);
1980 mq->recovery_needed = true;
1981 mq->recovery_req = req;
1982 spin_unlock_irqrestore(&mq->lock, flags);
1984 host->cqe_ops->cqe_recovery_start(host);
1986 schedule_work(&mq->recovery_work);
1990 mmc_blk_rw_reset_success(mq, req);
1993 * Block layer timeouts race with completions which means the normal
1994 * completion path cannot be used during recovery.
1996 if (mq->in_recovery)
1997 mmc_blk_cqe_complete_rq(mq, req);
1998 else if (likely(!blk_should_fake_timeout(req->q)))
1999 blk_mq_complete_request(req);
2002 void mmc_blk_mq_complete(struct request *req)
2004 struct mmc_queue *mq = req->q->queuedata;
2007 mmc_blk_cqe_complete_rq(mq, req);
2008 else if (likely(!blk_should_fake_timeout(req->q)))
2009 mmc_blk_mq_complete_rq(mq, req);
2012 static void mmc_blk_mq_poll_completion(struct mmc_queue *mq,
2013 struct request *req)
2015 struct mmc_queue_req *mqrq = req_to_mmc_queue_req(req);
2016 struct mmc_host *host = mq->card->host;
2018 if (mmc_blk_rq_error(&mqrq->brq) ||
2019 mmc_blk_card_busy(mq->card, req)) {
2020 mmc_blk_mq_rw_recovery(mq, req);
2022 mmc_blk_rw_reset_success(mq, req);
2023 mmc_retune_release(host);
2026 mmc_blk_urgent_bkops(mq, mqrq);
2029 static void mmc_blk_mq_dec_in_flight(struct mmc_queue *mq, enum mmc_issue_type issue_type)
2031 unsigned long flags;
2034 spin_lock_irqsave(&mq->lock, flags);
2036 mq->in_flight[issue_type] -= 1;
2038 put_card = (mmc_tot_in_flight(mq) == 0);
2040 spin_unlock_irqrestore(&mq->lock, flags);
2043 mmc_put_card(mq->card, &mq->ctx);
2046 static void mmc_blk_mq_post_req(struct mmc_queue *mq, struct request *req)
2048 enum mmc_issue_type issue_type = mmc_issue_type(mq, req);
2049 struct mmc_queue_req *mqrq = req_to_mmc_queue_req(req);
2050 struct mmc_request *mrq = &mqrq->brq.mrq;
2051 struct mmc_host *host = mq->card->host;
2053 mmc_post_req(host, mrq, 0);
2056 * Block layer timeouts race with completions which means the normal
2057 * completion path cannot be used during recovery.
2059 if (mq->in_recovery)
2060 mmc_blk_mq_complete_rq(mq, req);
2061 else if (likely(!blk_should_fake_timeout(req->q)))
2062 blk_mq_complete_request(req);
2064 mmc_blk_mq_dec_in_flight(mq, issue_type);
2067 void mmc_blk_mq_recovery(struct mmc_queue *mq)
2069 struct request *req = mq->recovery_req;
2070 struct mmc_host *host = mq->card->host;
2071 struct mmc_queue_req *mqrq = req_to_mmc_queue_req(req);
2073 mq->recovery_req = NULL;
2074 mq->rw_wait = false;
2076 if (mmc_blk_rq_error(&mqrq->brq)) {
2077 mmc_retune_hold_now(host);
2078 mmc_blk_mq_rw_recovery(mq, req);
2081 mmc_blk_urgent_bkops(mq, mqrq);
2083 mmc_blk_mq_post_req(mq, req);
2086 static void mmc_blk_mq_complete_prev_req(struct mmc_queue *mq,
2087 struct request **prev_req)
2089 if (mmc_host_done_complete(mq->card->host))
2092 mutex_lock(&mq->complete_lock);
2094 if (!mq->complete_req)
2097 mmc_blk_mq_poll_completion(mq, mq->complete_req);
2100 *prev_req = mq->complete_req;
2102 mmc_blk_mq_post_req(mq, mq->complete_req);
2104 mq->complete_req = NULL;
2107 mutex_unlock(&mq->complete_lock);
2110 void mmc_blk_mq_complete_work(struct work_struct *work)
2112 struct mmc_queue *mq = container_of(work, struct mmc_queue,
2115 mmc_blk_mq_complete_prev_req(mq, NULL);
2118 static void mmc_blk_mq_req_done(struct mmc_request *mrq)
2120 struct mmc_queue_req *mqrq = container_of(mrq, struct mmc_queue_req,
2122 struct request *req = mmc_queue_req_to_req(mqrq);
2123 struct request_queue *q = req->q;
2124 struct mmc_queue *mq = q->queuedata;
2125 struct mmc_host *host = mq->card->host;
2126 unsigned long flags;
2128 if (!mmc_host_done_complete(host)) {
2132 * We cannot complete the request in this context, so record
2133 * that there is a request to complete, and that a following
2134 * request does not need to wait (although it does need to
2135 * complete complete_req first).
2137 spin_lock_irqsave(&mq->lock, flags);
2138 mq->complete_req = req;
2139 mq->rw_wait = false;
2140 waiting = mq->waiting;
2141 spin_unlock_irqrestore(&mq->lock, flags);
2144 * If 'waiting' then the waiting task will complete this
2145 * request, otherwise queue a work to do it. Note that
2146 * complete_work may still race with the dispatch of a following
2152 queue_work(mq->card->complete_wq, &mq->complete_work);
2157 /* Take the recovery path for errors or urgent background operations */
2158 if (mmc_blk_rq_error(&mqrq->brq) ||
2159 mmc_blk_urgent_bkops_needed(mq, mqrq)) {
2160 spin_lock_irqsave(&mq->lock, flags);
2161 mq->recovery_needed = true;
2162 mq->recovery_req = req;
2163 spin_unlock_irqrestore(&mq->lock, flags);
2165 schedule_work(&mq->recovery_work);
2169 mmc_blk_rw_reset_success(mq, req);
2171 mq->rw_wait = false;
2174 mmc_blk_mq_post_req(mq, req);
2177 static bool mmc_blk_rw_wait_cond(struct mmc_queue *mq, int *err)
2179 unsigned long flags;
2183 * Wait while there is another request in progress, but not if recovery
2184 * is needed. Also indicate whether there is a request waiting to start.
2186 spin_lock_irqsave(&mq->lock, flags);
2187 if (mq->recovery_needed) {
2191 done = !mq->rw_wait;
2193 mq->waiting = !done;
2194 spin_unlock_irqrestore(&mq->lock, flags);
2199 static int mmc_blk_rw_wait(struct mmc_queue *mq, struct request **prev_req)
2203 wait_event(mq->wait, mmc_blk_rw_wait_cond(mq, &err));
2205 /* Always complete the previous request if there is one */
2206 mmc_blk_mq_complete_prev_req(mq, prev_req);
2211 static int mmc_blk_mq_issue_rw_rq(struct mmc_queue *mq,
2212 struct request *req)
2214 struct mmc_queue_req *mqrq = req_to_mmc_queue_req(req);
2215 struct mmc_host *host = mq->card->host;
2216 struct request *prev_req = NULL;
2219 mmc_blk_rw_rq_prep(mqrq, mq->card, 0, mq);
2221 mqrq->brq.mrq.done = mmc_blk_mq_req_done;
2223 mmc_pre_req(host, &mqrq->brq.mrq);
2225 err = mmc_blk_rw_wait(mq, &prev_req);
2231 err = mmc_start_request(host, &mqrq->brq.mrq);
2234 mmc_blk_mq_post_req(mq, prev_req);
2237 mq->rw_wait = false;
2239 /* Release re-tuning here where there is no synchronization required */
2240 if (err || mmc_host_done_complete(host))
2241 mmc_retune_release(host);
2245 mmc_post_req(host, &mqrq->brq.mrq, err);
2250 static int mmc_blk_wait_for_idle(struct mmc_queue *mq, struct mmc_host *host)
2253 return host->cqe_ops->cqe_wait_for_idle(host);
2255 return mmc_blk_rw_wait(mq, NULL);
2258 enum mmc_issued mmc_blk_mq_issue_rq(struct mmc_queue *mq, struct request *req)
2260 struct mmc_blk_data *md = mq->blkdata;
2261 struct mmc_card *card = md->queue.card;
2262 struct mmc_host *host = card->host;
2265 ret = mmc_blk_part_switch(card, md->part_type);
2267 return MMC_REQ_FAILED_TO_START;
2269 switch (mmc_issue_type(mq, req)) {
2270 case MMC_ISSUE_SYNC:
2271 ret = mmc_blk_wait_for_idle(mq, host);
2273 return MMC_REQ_BUSY;
2274 switch (req_op(req)) {
2276 case REQ_OP_DRV_OUT:
2277 mmc_blk_issue_drv_op(mq, req);
2279 case REQ_OP_DISCARD:
2280 mmc_blk_issue_discard_rq(mq, req);
2282 case REQ_OP_SECURE_ERASE:
2283 mmc_blk_issue_secdiscard_rq(mq, req);
2286 mmc_blk_issue_flush(mq, req);
2290 return MMC_REQ_FAILED_TO_START;
2292 return MMC_REQ_FINISHED;
2293 case MMC_ISSUE_DCMD:
2294 case MMC_ISSUE_ASYNC:
2295 switch (req_op(req)) {
2297 if (!mmc_cache_enabled(host)) {
2298 blk_mq_end_request(req, BLK_STS_OK);
2299 return MMC_REQ_FINISHED;
2301 ret = mmc_blk_cqe_issue_flush(mq, req);
2306 ret = mmc_blk_cqe_issue_rw_rq(mq, req);
2308 ret = mmc_blk_mq_issue_rw_rq(mq, req);
2315 return MMC_REQ_STARTED;
2316 return ret == -EBUSY ? MMC_REQ_BUSY : MMC_REQ_FAILED_TO_START;
2319 return MMC_REQ_FAILED_TO_START;
2323 static inline int mmc_blk_readonly(struct mmc_card *card)
2325 return mmc_card_readonly(card) ||
2326 !(card->csd.cmdclass & CCC_BLOCK_WRITE);
2329 static struct mmc_blk_data *mmc_blk_alloc_req(struct mmc_card *card,
2330 struct device *parent,
2333 const char *subname,
2336 struct mmc_blk_data *md;
2339 devidx = ida_simple_get(&mmc_blk_ida, 0, max_devices, GFP_KERNEL);
2342 * We get -ENOSPC because there are no more any available
2343 * devidx. The reason may be that, either userspace haven't yet
2344 * unmounted the partitions, which postpones mmc_blk_release()
2345 * from being called, or the device has more partitions than
2348 if (devidx == -ENOSPC)
2349 dev_err(mmc_dev(card->host),
2350 "no more device IDs available\n");
2352 return ERR_PTR(devidx);
2355 md = kzalloc(sizeof(struct mmc_blk_data), GFP_KERNEL);
2361 md->area_type = area_type;
2364 * Set the read-only status based on the supported commands
2365 * and the write protect switch.
2367 md->read_only = mmc_blk_readonly(card);
2369 md->disk = alloc_disk(perdev_minors);
2370 if (md->disk == NULL) {
2375 INIT_LIST_HEAD(&md->part);
2376 INIT_LIST_HEAD(&md->rpmbs);
2379 ret = mmc_init_queue(&md->queue, card);
2383 md->queue.blkdata = md;
2386 * Keep an extra reference to the queue so that we can shutdown the
2387 * queue (i.e. call blk_cleanup_queue()) while there are still
2388 * references to the 'md'. The corresponding blk_put_queue() is in
2391 if (!blk_get_queue(md->queue.queue)) {
2392 mmc_cleanup_queue(&md->queue);
2397 md->disk->major = MMC_BLOCK_MAJOR;
2398 md->disk->first_minor = devidx * perdev_minors;
2399 md->disk->fops = &mmc_bdops;
2400 md->disk->private_data = md;
2401 md->disk->queue = md->queue.queue;
2402 md->parent = parent;
2403 set_disk_ro(md->disk, md->read_only || default_ro);
2404 md->disk->flags = GENHD_FL_EXT_DEVT;
2405 if (area_type & (MMC_BLK_DATA_AREA_RPMB | MMC_BLK_DATA_AREA_BOOT))
2406 md->disk->flags |= GENHD_FL_NO_PART_SCAN
2407 | GENHD_FL_SUPPRESS_PARTITION_INFO;
2410 * As discussed on lkml, GENHD_FL_REMOVABLE should:
2412 * - be set for removable media with permanent block devices
2413 * - be unset for removable block devices with permanent media
2415 * Since MMC block devices clearly fall under the second
2416 * case, we do not set GENHD_FL_REMOVABLE. Userspace
2417 * should use the block device creation/destruction hotplug
2418 * messages to tell when the card is present.
2421 snprintf(md->disk->disk_name, sizeof(md->disk->disk_name),
2422 "mmcblk%u%s", card->host->index, subname ? subname : "");
2424 set_capacity(md->disk, size);
2426 if (mmc_host_cmd23(card->host)) {
2427 if ((mmc_card_mmc(card) &&
2428 card->csd.mmca_vsn >= CSD_SPEC_VER_3) ||
2429 (mmc_card_sd(card) &&
2430 card->scr.cmds & SD_SCR_CMD23_SUPPORT))
2431 md->flags |= MMC_BLK_CMD23;
2434 if (mmc_card_mmc(card) &&
2435 md->flags & MMC_BLK_CMD23 &&
2436 ((card->ext_csd.rel_param & EXT_CSD_WR_REL_PARAM_EN) ||
2437 card->ext_csd.rel_sectors)) {
2438 md->flags |= MMC_BLK_REL_WR;
2439 blk_queue_write_cache(md->queue.queue, true, true);
2449 ida_simple_remove(&mmc_blk_ida, devidx);
2450 return ERR_PTR(ret);
2453 static struct mmc_blk_data *mmc_blk_alloc(struct mmc_card *card)
2457 if (!mmc_card_sd(card) && mmc_card_blockaddr(card)) {
2459 * The EXT_CSD sector count is in number or 512 byte
2462 size = card->ext_csd.sectors;
2465 * The CSD capacity field is in units of read_blkbits.
2466 * set_capacity takes units of 512 bytes.
2468 size = (typeof(sector_t))card->csd.capacity
2469 << (card->csd.read_blkbits - 9);
2472 return mmc_blk_alloc_req(card, &card->dev, size, false, NULL,
2473 MMC_BLK_DATA_AREA_MAIN);
2476 static int mmc_blk_alloc_part(struct mmc_card *card,
2477 struct mmc_blk_data *md,
2478 unsigned int part_type,
2481 const char *subname,
2485 struct mmc_blk_data *part_md;
2487 part_md = mmc_blk_alloc_req(card, disk_to_dev(md->disk), size, default_ro,
2488 subname, area_type);
2489 if (IS_ERR(part_md))
2490 return PTR_ERR(part_md);
2491 part_md->part_type = part_type;
2492 list_add(&part_md->part, &md->part);
2494 string_get_size((u64)get_capacity(part_md->disk), 512, STRING_UNITS_2,
2495 cap_str, sizeof(cap_str));
2496 pr_info("%s: %s %s partition %u %s\n",
2497 part_md->disk->disk_name, mmc_card_id(card),
2498 mmc_card_name(card), part_md->part_type, cap_str);
2503 * mmc_rpmb_ioctl() - ioctl handler for the RPMB chardev
2504 * @filp: the character device file
2505 * @cmd: the ioctl() command
2506 * @arg: the argument from userspace
2508 * This will essentially just redirect the ioctl()s coming in over to
2509 * the main block device spawning the RPMB character device.
2511 static long mmc_rpmb_ioctl(struct file *filp, unsigned int cmd,
2514 struct mmc_rpmb_data *rpmb = filp->private_data;
2519 ret = mmc_blk_ioctl_cmd(rpmb->md,
2520 (struct mmc_ioc_cmd __user *)arg,
2523 case MMC_IOC_MULTI_CMD:
2524 ret = mmc_blk_ioctl_multi_cmd(rpmb->md,
2525 (struct mmc_ioc_multi_cmd __user *)arg,
2536 #ifdef CONFIG_COMPAT
2537 static long mmc_rpmb_ioctl_compat(struct file *filp, unsigned int cmd,
2540 return mmc_rpmb_ioctl(filp, cmd, (unsigned long)compat_ptr(arg));
2544 static int mmc_rpmb_chrdev_open(struct inode *inode, struct file *filp)
2546 struct mmc_rpmb_data *rpmb = container_of(inode->i_cdev,
2547 struct mmc_rpmb_data, chrdev);
2549 get_device(&rpmb->dev);
2550 filp->private_data = rpmb;
2551 mmc_blk_get(rpmb->md->disk);
2553 return nonseekable_open(inode, filp);
2556 static int mmc_rpmb_chrdev_release(struct inode *inode, struct file *filp)
2558 struct mmc_rpmb_data *rpmb = container_of(inode->i_cdev,
2559 struct mmc_rpmb_data, chrdev);
2561 mmc_blk_put(rpmb->md);
2562 put_device(&rpmb->dev);
2567 static const struct file_operations mmc_rpmb_fileops = {
2568 .release = mmc_rpmb_chrdev_release,
2569 .open = mmc_rpmb_chrdev_open,
2570 .owner = THIS_MODULE,
2571 .llseek = no_llseek,
2572 .unlocked_ioctl = mmc_rpmb_ioctl,
2573 #ifdef CONFIG_COMPAT
2574 .compat_ioctl = mmc_rpmb_ioctl_compat,
2578 static void mmc_blk_rpmb_device_release(struct device *dev)
2580 struct mmc_rpmb_data *rpmb = dev_get_drvdata(dev);
2582 ida_simple_remove(&mmc_rpmb_ida, rpmb->id);
2586 static int mmc_blk_alloc_rpmb_part(struct mmc_card *card,
2587 struct mmc_blk_data *md,
2588 unsigned int part_index,
2590 const char *subname)
2593 char rpmb_name[DISK_NAME_LEN];
2595 struct mmc_rpmb_data *rpmb;
2597 /* This creates the minor number for the RPMB char device */
2598 devidx = ida_simple_get(&mmc_rpmb_ida, 0, max_devices, GFP_KERNEL);
2602 rpmb = kzalloc(sizeof(*rpmb), GFP_KERNEL);
2604 ida_simple_remove(&mmc_rpmb_ida, devidx);
2608 snprintf(rpmb_name, sizeof(rpmb_name),
2609 "mmcblk%u%s", card->host->index, subname ? subname : "");
2612 rpmb->part_index = part_index;
2613 rpmb->dev.init_name = rpmb_name;
2614 rpmb->dev.bus = &mmc_rpmb_bus_type;
2615 rpmb->dev.devt = MKDEV(MAJOR(mmc_rpmb_devt), rpmb->id);
2616 rpmb->dev.parent = &card->dev;
2617 rpmb->dev.release = mmc_blk_rpmb_device_release;
2618 device_initialize(&rpmb->dev);
2619 dev_set_drvdata(&rpmb->dev, rpmb);
2622 cdev_init(&rpmb->chrdev, &mmc_rpmb_fileops);
2623 rpmb->chrdev.owner = THIS_MODULE;
2624 ret = cdev_device_add(&rpmb->chrdev, &rpmb->dev);
2626 pr_err("%s: could not add character device\n", rpmb_name);
2627 goto out_put_device;
2630 list_add(&rpmb->node, &md->rpmbs);
2632 string_get_size((u64)size, 512, STRING_UNITS_2,
2633 cap_str, sizeof(cap_str));
2635 pr_info("%s: %s %s partition %u %s, chardev (%d:%d)\n",
2636 rpmb_name, mmc_card_id(card),
2637 mmc_card_name(card), EXT_CSD_PART_CONFIG_ACC_RPMB, cap_str,
2638 MAJOR(mmc_rpmb_devt), rpmb->id);
2643 put_device(&rpmb->dev);
2647 static void mmc_blk_remove_rpmb_part(struct mmc_rpmb_data *rpmb)
2650 cdev_device_del(&rpmb->chrdev, &rpmb->dev);
2651 put_device(&rpmb->dev);
2654 /* MMC Physical partitions consist of two boot partitions and
2655 * up to four general purpose partitions.
2656 * For each partition enabled in EXT_CSD a block device will be allocatedi
2657 * to provide access to the partition.
2660 static int mmc_blk_alloc_parts(struct mmc_card *card, struct mmc_blk_data *md)
2664 if (!mmc_card_mmc(card))
2667 for (idx = 0; idx < card->nr_parts; idx++) {
2668 if (card->part[idx].area_type & MMC_BLK_DATA_AREA_RPMB) {
2670 * RPMB partitions does not provide block access, they
2671 * are only accessed using ioctl():s. Thus create
2672 * special RPMB block devices that do not have a
2673 * backing block queue for these.
2675 ret = mmc_blk_alloc_rpmb_part(card, md,
2676 card->part[idx].part_cfg,
2677 card->part[idx].size >> 9,
2678 card->part[idx].name);
2681 } else if (card->part[idx].size) {
2682 ret = mmc_blk_alloc_part(card, md,
2683 card->part[idx].part_cfg,
2684 card->part[idx].size >> 9,
2685 card->part[idx].force_ro,
2686 card->part[idx].name,
2687 card->part[idx].area_type);
2696 static void mmc_blk_remove_req(struct mmc_blk_data *md)
2698 struct mmc_card *card;
2702 * Flush remaining requests and free queues. It
2703 * is freeing the queue that stops new requests
2704 * from being accepted.
2706 card = md->queue.card;
2707 if (md->disk->flags & GENHD_FL_UP) {
2708 device_remove_file(disk_to_dev(md->disk), &md->force_ro);
2709 if ((md->area_type & MMC_BLK_DATA_AREA_BOOT) &&
2710 card->ext_csd.boot_ro_lockable)
2711 device_remove_file(disk_to_dev(md->disk),
2712 &md->power_ro_lock);
2714 del_gendisk(md->disk);
2716 mmc_cleanup_queue(&md->queue);
2721 static void mmc_blk_remove_parts(struct mmc_card *card,
2722 struct mmc_blk_data *md)
2724 struct list_head *pos, *q;
2725 struct mmc_blk_data *part_md;
2726 struct mmc_rpmb_data *rpmb;
2728 /* Remove RPMB partitions */
2729 list_for_each_safe(pos, q, &md->rpmbs) {
2730 rpmb = list_entry(pos, struct mmc_rpmb_data, node);
2732 mmc_blk_remove_rpmb_part(rpmb);
2734 /* Remove block partitions */
2735 list_for_each_safe(pos, q, &md->part) {
2736 part_md = list_entry(pos, struct mmc_blk_data, part);
2738 mmc_blk_remove_req(part_md);
2742 static int mmc_add_disk(struct mmc_blk_data *md)
2745 struct mmc_card *card = md->queue.card;
2747 device_add_disk(md->parent, md->disk, NULL);
2748 md->force_ro.show = force_ro_show;
2749 md->force_ro.store = force_ro_store;
2750 sysfs_attr_init(&md->force_ro.attr);
2751 md->force_ro.attr.name = "force_ro";
2752 md->force_ro.attr.mode = S_IRUGO | S_IWUSR;
2753 ret = device_create_file(disk_to_dev(md->disk), &md->force_ro);
2757 if ((md->area_type & MMC_BLK_DATA_AREA_BOOT) &&
2758 card->ext_csd.boot_ro_lockable) {
2761 if (card->ext_csd.boot_ro_lock & EXT_CSD_BOOT_WP_B_PWR_WP_DIS)
2764 mode = S_IRUGO | S_IWUSR;
2766 md->power_ro_lock.show = power_ro_lock_show;
2767 md->power_ro_lock.store = power_ro_lock_store;
2768 sysfs_attr_init(&md->power_ro_lock.attr);
2769 md->power_ro_lock.attr.mode = mode;
2770 md->power_ro_lock.attr.name =
2771 "ro_lock_until_next_power_on";
2772 ret = device_create_file(disk_to_dev(md->disk),
2773 &md->power_ro_lock);
2775 goto power_ro_lock_fail;
2780 device_remove_file(disk_to_dev(md->disk), &md->force_ro);
2782 del_gendisk(md->disk);
2787 #ifdef CONFIG_DEBUG_FS
2789 static int mmc_dbg_card_status_get(void *data, u64 *val)
2791 struct mmc_card *card = data;
2792 struct mmc_blk_data *md = dev_get_drvdata(&card->dev);
2793 struct mmc_queue *mq = &md->queue;
2794 struct request *req;
2797 /* Ask the block layer about the card status */
2798 req = blk_get_request(mq->queue, REQ_OP_DRV_IN, 0);
2800 return PTR_ERR(req);
2801 req_to_mmc_queue_req(req)->drv_op = MMC_DRV_OP_GET_CARD_STATUS;
2802 req_to_mmc_queue_req(req)->drv_op_result = -EIO;
2803 blk_execute_rq(mq->queue, NULL, req, 0);
2804 ret = req_to_mmc_queue_req(req)->drv_op_result;
2809 blk_put_request(req);
2813 DEFINE_DEBUGFS_ATTRIBUTE(mmc_dbg_card_status_fops, mmc_dbg_card_status_get,
2816 /* That is two digits * 512 + 1 for newline */
2817 #define EXT_CSD_STR_LEN 1025
2819 static int mmc_ext_csd_open(struct inode *inode, struct file *filp)
2821 struct mmc_card *card = inode->i_private;
2822 struct mmc_blk_data *md = dev_get_drvdata(&card->dev);
2823 struct mmc_queue *mq = &md->queue;
2824 struct request *req;
2830 buf = kmalloc(EXT_CSD_STR_LEN + 1, GFP_KERNEL);
2834 /* Ask the block layer for the EXT CSD */
2835 req = blk_get_request(mq->queue, REQ_OP_DRV_IN, 0);
2840 req_to_mmc_queue_req(req)->drv_op = MMC_DRV_OP_GET_EXT_CSD;
2841 req_to_mmc_queue_req(req)->drv_op_result = -EIO;
2842 req_to_mmc_queue_req(req)->drv_op_data = &ext_csd;
2843 blk_execute_rq(mq->queue, NULL, req, 0);
2844 err = req_to_mmc_queue_req(req)->drv_op_result;
2845 blk_put_request(req);
2847 pr_err("FAILED %d\n", err);
2851 for (i = 0; i < 512; i++)
2852 n += sprintf(buf + n, "%02x", ext_csd[i]);
2853 n += sprintf(buf + n, "\n");
2855 if (n != EXT_CSD_STR_LEN) {
2861 filp->private_data = buf;
2870 static ssize_t mmc_ext_csd_read(struct file *filp, char __user *ubuf,
2871 size_t cnt, loff_t *ppos)
2873 char *buf = filp->private_data;
2875 return simple_read_from_buffer(ubuf, cnt, ppos,
2876 buf, EXT_CSD_STR_LEN);
2879 static int mmc_ext_csd_release(struct inode *inode, struct file *file)
2881 kfree(file->private_data);
2885 static const struct file_operations mmc_dbg_ext_csd_fops = {
2886 .open = mmc_ext_csd_open,
2887 .read = mmc_ext_csd_read,
2888 .release = mmc_ext_csd_release,
2889 .llseek = default_llseek,
2892 static int mmc_blk_add_debugfs(struct mmc_card *card, struct mmc_blk_data *md)
2894 struct dentry *root;
2896 if (!card->debugfs_root)
2899 root = card->debugfs_root;
2901 if (mmc_card_mmc(card) || mmc_card_sd(card)) {
2903 debugfs_create_file_unsafe("status", 0400, root,
2905 &mmc_dbg_card_status_fops);
2906 if (!md->status_dentry)
2910 if (mmc_card_mmc(card)) {
2911 md->ext_csd_dentry =
2912 debugfs_create_file("ext_csd", S_IRUSR, root, card,
2913 &mmc_dbg_ext_csd_fops);
2914 if (!md->ext_csd_dentry)
2921 static void mmc_blk_remove_debugfs(struct mmc_card *card,
2922 struct mmc_blk_data *md)
2924 if (!card->debugfs_root)
2927 if (!IS_ERR_OR_NULL(md->status_dentry)) {
2928 debugfs_remove(md->status_dentry);
2929 md->status_dentry = NULL;
2932 if (!IS_ERR_OR_NULL(md->ext_csd_dentry)) {
2933 debugfs_remove(md->ext_csd_dentry);
2934 md->ext_csd_dentry = NULL;
2940 static int mmc_blk_add_debugfs(struct mmc_card *card, struct mmc_blk_data *md)
2945 static void mmc_blk_remove_debugfs(struct mmc_card *card,
2946 struct mmc_blk_data *md)
2950 #endif /* CONFIG_DEBUG_FS */
2952 static int mmc_blk_probe(struct mmc_card *card)
2954 struct mmc_blk_data *md, *part_md;
2958 * Check that the card supports the command class(es) we need.
2960 if (!(card->csd.cmdclass & CCC_BLOCK_READ))
2963 mmc_fixup_device(card, mmc_blk_fixups);
2965 card->complete_wq = alloc_workqueue("mmc_complete",
2966 WQ_MEM_RECLAIM | WQ_HIGHPRI, 0);
2967 if (unlikely(!card->complete_wq)) {
2968 pr_err("Failed to create mmc completion workqueue");
2972 md = mmc_blk_alloc(card);
2976 string_get_size((u64)get_capacity(md->disk), 512, STRING_UNITS_2,
2977 cap_str, sizeof(cap_str));
2978 pr_info("%s: %s %s %s %s\n",
2979 md->disk->disk_name, mmc_card_id(card), mmc_card_name(card),
2980 cap_str, md->read_only ? "(ro)" : "");
2982 if (mmc_blk_alloc_parts(card, md))
2985 dev_set_drvdata(&card->dev, md);
2987 if (mmc_add_disk(md))
2990 list_for_each_entry(part_md, &md->part, part) {
2991 if (mmc_add_disk(part_md))
2995 /* Add two debugfs entries */
2996 mmc_blk_add_debugfs(card, md);
2998 pm_runtime_set_autosuspend_delay(&card->dev, 3000);
2999 pm_runtime_use_autosuspend(&card->dev);
3002 * Don't enable runtime PM for SD-combo cards here. Leave that
3003 * decision to be taken during the SDIO init sequence instead.
3005 if (card->type != MMC_TYPE_SD_COMBO) {
3006 pm_runtime_set_active(&card->dev);
3007 pm_runtime_enable(&card->dev);
3013 mmc_blk_remove_parts(card, md);
3014 mmc_blk_remove_req(md);
3018 static void mmc_blk_remove(struct mmc_card *card)
3020 struct mmc_blk_data *md = dev_get_drvdata(&card->dev);
3022 mmc_blk_remove_debugfs(card, md);
3023 mmc_blk_remove_parts(card, md);
3024 pm_runtime_get_sync(&card->dev);
3025 if (md->part_curr != md->part_type) {
3026 mmc_claim_host(card->host);
3027 mmc_blk_part_switch(card, md->part_type);
3028 mmc_release_host(card->host);
3030 if (card->type != MMC_TYPE_SD_COMBO)
3031 pm_runtime_disable(&card->dev);
3032 pm_runtime_put_noidle(&card->dev);
3033 mmc_blk_remove_req(md);
3034 dev_set_drvdata(&card->dev, NULL);
3035 destroy_workqueue(card->complete_wq);
3038 static int _mmc_blk_suspend(struct mmc_card *card)
3040 struct mmc_blk_data *part_md;
3041 struct mmc_blk_data *md = dev_get_drvdata(&card->dev);
3044 mmc_queue_suspend(&md->queue);
3045 list_for_each_entry(part_md, &md->part, part) {
3046 mmc_queue_suspend(&part_md->queue);
3052 static void mmc_blk_shutdown(struct mmc_card *card)
3054 _mmc_blk_suspend(card);
3057 #ifdef CONFIG_PM_SLEEP
3058 static int mmc_blk_suspend(struct device *dev)
3060 struct mmc_card *card = mmc_dev_to_card(dev);
3062 return _mmc_blk_suspend(card);
3065 static int mmc_blk_resume(struct device *dev)
3067 struct mmc_blk_data *part_md;
3068 struct mmc_blk_data *md = dev_get_drvdata(dev);
3072 * Resume involves the card going into idle state,
3073 * so current partition is always the main one.
3075 md->part_curr = md->part_type;
3076 mmc_queue_resume(&md->queue);
3077 list_for_each_entry(part_md, &md->part, part) {
3078 mmc_queue_resume(&part_md->queue);
3085 static SIMPLE_DEV_PM_OPS(mmc_blk_pm_ops, mmc_blk_suspend, mmc_blk_resume);
3087 static struct mmc_driver mmc_driver = {
3090 .pm = &mmc_blk_pm_ops,
3092 .probe = mmc_blk_probe,
3093 .remove = mmc_blk_remove,
3094 .shutdown = mmc_blk_shutdown,
3097 static int __init mmc_blk_init(void)
3101 res = bus_register(&mmc_rpmb_bus_type);
3103 pr_err("mmcblk: could not register RPMB bus type\n");
3106 res = alloc_chrdev_region(&mmc_rpmb_devt, 0, MAX_DEVICES, "rpmb");
3108 pr_err("mmcblk: failed to allocate rpmb chrdev region\n");
3112 if (perdev_minors != CONFIG_MMC_BLOCK_MINORS)
3113 pr_info("mmcblk: using %d minors per device\n", perdev_minors);
3115 max_devices = min(MAX_DEVICES, (1 << MINORBITS) / perdev_minors);
3117 res = register_blkdev(MMC_BLOCK_MAJOR, "mmc");
3119 goto out_chrdev_unreg;
3121 res = mmc_register_driver(&mmc_driver);
3123 goto out_blkdev_unreg;
3128 unregister_blkdev(MMC_BLOCK_MAJOR, "mmc");
3130 unregister_chrdev_region(mmc_rpmb_devt, MAX_DEVICES);
3132 bus_unregister(&mmc_rpmb_bus_type);
3136 static void __exit mmc_blk_exit(void)
3138 mmc_unregister_driver(&mmc_driver);
3139 unregister_blkdev(MMC_BLOCK_MAJOR, "mmc");
3140 unregister_chrdev_region(mmc_rpmb_devt, MAX_DEVICES);
3141 bus_unregister(&mmc_rpmb_bus_type);
3144 module_init(mmc_blk_init);
3145 module_exit(mmc_blk_exit);
3147 MODULE_LICENSE("GPL");
3148 MODULE_DESCRIPTION("Multimedia Card (MMC) block device driver");