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
);
214 static ssize_t
power_ro_lock_store(struct device
*dev
,
215 struct device_attribute
*attr
, const char *buf
, size_t count
)
218 struct mmc_blk_data
*md
, *part_md
;
219 struct mmc_card
*card
;
222 if (kstrtoul(buf
, 0, &set
))
228 md
= mmc_blk_get(dev_to_disk(dev
));
229 card
= md
->queue
.card
;
233 ret
= mmc_switch(card
, EXT_CSD_CMD_SET_NORMAL
, EXT_CSD_BOOT_WP
,
234 card
->ext_csd
.boot_ro_lock
|
235 EXT_CSD_BOOT_WP_B_PWR_WP_EN
,
236 card
->ext_csd
.part_time
);
238 pr_err("%s: Locking boot partition ro until next power on failed: %d\n", md
->disk
->disk_name
, ret
);
240 card
->ext_csd
.boot_ro_lock
|= EXT_CSD_BOOT_WP_B_PWR_WP_EN
;
245 pr_info("%s: Locking boot partition ro until next power on\n",
246 md
->disk
->disk_name
);
247 set_disk_ro(md
->disk
, 1);
249 list_for_each_entry(part_md
, &md
->part
, part
)
250 if (part_md
->area_type
== MMC_BLK_DATA_AREA_BOOT
) {
251 pr_info("%s: Locking boot partition ro until next power on\n", part_md
->disk
->disk_name
);
252 set_disk_ro(part_md
->disk
, 1);
260 static ssize_t
force_ro_show(struct device
*dev
, struct device_attribute
*attr
,
264 struct mmc_blk_data
*md
= mmc_blk_get(dev_to_disk(dev
));
266 ret
= snprintf(buf
, PAGE_SIZE
, "%d\n",
267 get_disk_ro(dev_to_disk(dev
)) ^
273 static ssize_t
force_ro_store(struct device
*dev
, struct device_attribute
*attr
,
274 const char *buf
, size_t count
)
278 struct mmc_blk_data
*md
= mmc_blk_get(dev_to_disk(dev
));
279 unsigned long set
= simple_strtoul(buf
, &end
, 0);
285 set_disk_ro(dev_to_disk(dev
), set
|| md
->read_only
);
292 static int mmc_blk_open(struct block_device
*bdev
, fmode_t mode
)
294 struct mmc_blk_data
*md
= mmc_blk_get(bdev
->bd_disk
);
297 mutex_lock(&block_mutex
);
300 check_disk_change(bdev
);
303 if ((mode
& FMODE_WRITE
) && md
->read_only
) {
308 mutex_unlock(&block_mutex
);
313 static void mmc_blk_release(struct gendisk
*disk
, fmode_t mode
)
315 struct mmc_blk_data
*md
= disk
->private_data
;
317 mutex_lock(&block_mutex
);
319 mutex_unlock(&block_mutex
);
323 mmc_blk_getgeo(struct block_device
*bdev
, struct hd_geometry
*geo
)
325 geo
->cylinders
= get_capacity(bdev
->bd_disk
) / (4 * 16);
331 struct mmc_blk_ioc_data
{
332 struct mmc_ioc_cmd ic
;
337 static struct mmc_blk_ioc_data
*mmc_blk_ioctl_copy_from_user(
338 struct mmc_ioc_cmd __user
*user
)
340 struct mmc_blk_ioc_data
*idata
;
343 idata
= kzalloc(sizeof(*idata
), GFP_KERNEL
);
349 if (copy_from_user(&idata
->ic
, user
, sizeof(idata
->ic
))) {
354 idata
->buf_bytes
= (u64
) idata
->ic
.blksz
* idata
->ic
.blocks
;
355 if (idata
->buf_bytes
> MMC_IOC_MAX_BYTES
) {
360 if (!idata
->buf_bytes
)
363 idata
->buf
= kzalloc(idata
->buf_bytes
, GFP_KERNEL
);
369 if (copy_from_user(idata
->buf
, (void __user
*)(unsigned long)
370 idata
->ic
.data_ptr
, idata
->buf_bytes
)) {
385 static int ioctl_rpmb_card_status_poll(struct mmc_card
*card
, u32
*status
,
391 if (!status
|| !retries_max
)
395 err
= get_card_status(card
, status
, 5);
399 if (!R1_STATUS(*status
) &&
400 (R1_CURRENT_STATE(*status
) != R1_STATE_PRG
))
401 break; /* RPMB programming operation complete */
404 * Rechedule to give the MMC device a chance to continue
405 * processing the previous command without being polled too
408 usleep_range(1000, 5000);
409 } while (++retry_count
< retries_max
);
411 if (retry_count
== retries_max
)
417 static int ioctl_do_sanitize(struct mmc_card
*card
)
421 if (!mmc_can_sanitize(card
)) {
422 pr_warn("%s: %s - SANITIZE is not supported\n",
423 mmc_hostname(card
->host
), __func__
);
428 pr_debug("%s: %s - SANITIZE IN PROGRESS...\n",
429 mmc_hostname(card
->host
), __func__
);
431 err
= mmc_switch(card
, EXT_CSD_CMD_SET_NORMAL
,
432 EXT_CSD_SANITIZE_START
, 1,
433 MMC_SANITIZE_REQ_TIMEOUT
);
436 pr_err("%s: %s - EXT_CSD_SANITIZE_START failed. err=%d\n",
437 mmc_hostname(card
->host
), __func__
, err
);
439 pr_debug("%s: %s - SANITIZE COMPLETED\n", mmc_hostname(card
->host
),
445 static int mmc_blk_ioctl_cmd(struct block_device
*bdev
,
446 struct mmc_ioc_cmd __user
*ic_ptr
)
448 struct mmc_blk_ioc_data
*idata
;
449 struct mmc_blk_data
*md
;
450 struct mmc_card
*card
;
451 struct mmc_command cmd
= {0};
452 struct mmc_data data
= {0};
453 struct mmc_request mrq
= {NULL
};
454 struct scatterlist sg
;
460 * The caller must have CAP_SYS_RAWIO, and must be calling this on the
461 * whole block device, not on a partition. This prevents overspray
462 * between sibling partitions.
464 if ((!capable(CAP_SYS_RAWIO
)) || (bdev
!= bdev
->bd_contains
))
467 idata
= mmc_blk_ioctl_copy_from_user(ic_ptr
);
469 return PTR_ERR(idata
);
471 md
= mmc_blk_get(bdev
->bd_disk
);
477 if (md
->area_type
& MMC_BLK_DATA_AREA_RPMB
)
480 card
= md
->queue
.card
;
486 cmd
.opcode
= idata
->ic
.opcode
;
487 cmd
.arg
= idata
->ic
.arg
;
488 cmd
.flags
= idata
->ic
.flags
;
490 if (idata
->buf_bytes
) {
493 data
.blksz
= idata
->ic
.blksz
;
494 data
.blocks
= idata
->ic
.blocks
;
496 sg_init_one(data
.sg
, idata
->buf
, idata
->buf_bytes
);
498 if (idata
->ic
.write_flag
)
499 data
.flags
= MMC_DATA_WRITE
;
501 data
.flags
= MMC_DATA_READ
;
503 /* data.flags must already be set before doing this. */
504 mmc_set_data_timeout(&data
, card
);
506 /* Allow overriding the timeout_ns for empirical tuning. */
507 if (idata
->ic
.data_timeout_ns
)
508 data
.timeout_ns
= idata
->ic
.data_timeout_ns
;
510 if ((cmd
.flags
& MMC_RSP_R1B
) == MMC_RSP_R1B
) {
512 * Pretend this is a data transfer and rely on the
513 * host driver to compute timeout. When all host
514 * drivers support cmd.cmd_timeout for R1B, this
518 * cmd.cmd_timeout = idata->ic.cmd_timeout_ms;
520 data
.timeout_ns
= idata
->ic
.cmd_timeout_ms
* 1000000;
530 err
= mmc_blk_part_switch(card
, md
);
534 if (idata
->ic
.is_acmd
) {
535 err
= mmc_app_cmd(card
->host
, card
);
541 err
= mmc_set_blockcount(card
, data
.blocks
,
542 idata
->ic
.write_flag
& (1 << 31));
547 if ((MMC_EXTRACT_INDEX_FROM_ARG(cmd
.arg
) == EXT_CSD_SANITIZE_START
) &&
548 (cmd
.opcode
== MMC_SWITCH
)) {
549 err
= ioctl_do_sanitize(card
);
552 pr_err("%s: ioctl_do_sanitize() failed. err = %d",
558 mmc_wait_for_req(card
->host
, &mrq
);
561 dev_err(mmc_dev(card
->host
), "%s: cmd error %d\n",
562 __func__
, cmd
.error
);
567 dev_err(mmc_dev(card
->host
), "%s: data error %d\n",
568 __func__
, data
.error
);
574 * According to the SD specs, some commands require a delay after
575 * issuing the command.
577 if (idata
->ic
.postsleep_min_us
)
578 usleep_range(idata
->ic
.postsleep_min_us
, idata
->ic
.postsleep_max_us
);
580 if (copy_to_user(&(ic_ptr
->response
), cmd
.resp
, sizeof(cmd
.resp
))) {
585 if (!idata
->ic
.write_flag
) {
586 if (copy_to_user((void __user
*)(unsigned long) idata
->ic
.data_ptr
,
587 idata
->buf
, idata
->buf_bytes
)) {
595 * Ensure RPMB command has completed by polling CMD13
598 err
= ioctl_rpmb_card_status_poll(card
, &status
, 5);
600 dev_err(mmc_dev(card
->host
),
601 "%s: Card Status=0x%08X, error %d\n",
602 __func__
, status
, err
);
616 static int mmc_blk_ioctl(struct block_device
*bdev
, fmode_t mode
,
617 unsigned int cmd
, unsigned long arg
)
620 if (cmd
== MMC_IOC_CMD
)
621 ret
= mmc_blk_ioctl_cmd(bdev
, (struct mmc_ioc_cmd __user
*)arg
);
626 static int mmc_blk_compat_ioctl(struct block_device
*bdev
, fmode_t mode
,
627 unsigned int cmd
, unsigned long arg
)
629 return mmc_blk_ioctl(bdev
, mode
, cmd
, (unsigned long) compat_ptr(arg
));
633 static const struct block_device_operations mmc_bdops
= {
634 .open
= mmc_blk_open
,
635 .release
= mmc_blk_release
,
636 .getgeo
= mmc_blk_getgeo
,
637 .owner
= THIS_MODULE
,
638 .ioctl
= mmc_blk_ioctl
,
640 .compat_ioctl
= mmc_blk_compat_ioctl
,
644 static inline int mmc_blk_part_switch(struct mmc_card
*card
,
645 struct mmc_blk_data
*md
)
648 struct mmc_blk_data
*main_md
= dev_get_drvdata(&card
->dev
);
650 if (main_md
->part_curr
== md
->part_type
)
653 if (mmc_card_mmc(card
)) {
654 u8 part_config
= card
->ext_csd
.part_config
;
656 part_config
&= ~EXT_CSD_PART_CONFIG_ACC_MASK
;
657 part_config
|= md
->part_type
;
659 ret
= mmc_switch(card
, EXT_CSD_CMD_SET_NORMAL
,
660 EXT_CSD_PART_CONFIG
, part_config
,
661 card
->ext_csd
.part_time
);
665 card
->ext_csd
.part_config
= part_config
;
668 main_md
->part_curr
= md
->part_type
;
672 static u32
mmc_sd_num_wr_blocks(struct mmc_card
*card
)
678 struct mmc_request mrq
= {NULL
};
679 struct mmc_command cmd
= {0};
680 struct mmc_data data
= {0};
682 struct scatterlist sg
;
684 cmd
.opcode
= MMC_APP_CMD
;
685 cmd
.arg
= card
->rca
<< 16;
686 cmd
.flags
= MMC_RSP_SPI_R1
| MMC_RSP_R1
| MMC_CMD_AC
;
688 err
= mmc_wait_for_cmd(card
->host
, &cmd
, 0);
691 if (!mmc_host_is_spi(card
->host
) && !(cmd
.resp
[0] & R1_APP_CMD
))
694 memset(&cmd
, 0, sizeof(struct mmc_command
));
696 cmd
.opcode
= SD_APP_SEND_NUM_WR_BLKS
;
698 cmd
.flags
= MMC_RSP_SPI_R1
| MMC_RSP_R1
| MMC_CMD_ADTC
;
702 data
.flags
= MMC_DATA_READ
;
705 mmc_set_data_timeout(&data
, card
);
710 blocks
= kmalloc(4, GFP_KERNEL
);
714 sg_init_one(&sg
, blocks
, 4);
716 mmc_wait_for_req(card
->host
, &mrq
);
718 result
= ntohl(*blocks
);
721 if (cmd
.error
|| data
.error
)
727 static int get_card_status(struct mmc_card
*card
, u32
*status
, int retries
)
729 struct mmc_command cmd
= {0};
732 cmd
.opcode
= MMC_SEND_STATUS
;
733 if (!mmc_host_is_spi(card
->host
))
734 cmd
.arg
= card
->rca
<< 16;
735 cmd
.flags
= MMC_RSP_SPI_R2
| MMC_RSP_R1
| MMC_CMD_AC
;
736 err
= mmc_wait_for_cmd(card
->host
, &cmd
, retries
);
738 *status
= cmd
.resp
[0];
742 static int card_busy_detect(struct mmc_card
*card
, unsigned int timeout_ms
,
743 bool hw_busy_detect
, struct request
*req
, int *gen_err
)
745 unsigned long timeout
= jiffies
+ msecs_to_jiffies(timeout_ms
);
750 err
= get_card_status(card
, &status
, 5);
752 pr_err("%s: error %d requesting status\n",
753 req
->rq_disk
->disk_name
, err
);
757 if (status
& R1_ERROR
) {
758 pr_err("%s: %s: error sending status cmd, status %#x\n",
759 req
->rq_disk
->disk_name
, __func__
, status
);
763 /* We may rely on the host hw to handle busy detection.*/
764 if ((card
->host
->caps
& MMC_CAP_WAIT_WHILE_BUSY
) &&
769 * Timeout if the device never becomes ready for data and never
770 * leaves the program state.
772 if (time_after(jiffies
, timeout
)) {
773 pr_err("%s: Card stuck in programming state! %s %s\n",
774 mmc_hostname(card
->host
),
775 req
->rq_disk
->disk_name
, __func__
);
780 * Some cards mishandle the status bits,
781 * so make sure to check both the busy
782 * indication and the card state.
784 } while (!(status
& R1_READY_FOR_DATA
) ||
785 (R1_CURRENT_STATE(status
) == R1_STATE_PRG
));
790 static int send_stop(struct mmc_card
*card
, unsigned int timeout_ms
,
791 struct request
*req
, int *gen_err
, u32
*stop_status
)
793 struct mmc_host
*host
= card
->host
;
794 struct mmc_command cmd
= {0};
796 bool use_r1b_resp
= rq_data_dir(req
) == WRITE
;
799 * Normally we use R1B responses for WRITE, but in cases where the host
800 * has specified a max_busy_timeout we need to validate it. A failure
801 * means we need to prevent the host from doing hw busy detection, which
802 * is done by converting to a R1 response instead.
804 if (host
->max_busy_timeout
&& (timeout_ms
> host
->max_busy_timeout
))
805 use_r1b_resp
= false;
807 cmd
.opcode
= MMC_STOP_TRANSMISSION
;
809 cmd
.flags
= MMC_RSP_SPI_R1B
| MMC_RSP_R1B
| MMC_CMD_AC
;
810 cmd
.busy_timeout
= timeout_ms
;
812 cmd
.flags
= MMC_RSP_SPI_R1
| MMC_RSP_R1
| MMC_CMD_AC
;
815 err
= mmc_wait_for_cmd(host
, &cmd
, 5);
819 *stop_status
= cmd
.resp
[0];
821 /* No need to check card status in case of READ. */
822 if (rq_data_dir(req
) == READ
)
825 if (!mmc_host_is_spi(host
) &&
826 (*stop_status
& R1_ERROR
)) {
827 pr_err("%s: %s: general error sending stop command, resp %#x\n",
828 req
->rq_disk
->disk_name
, __func__
, *stop_status
);
832 return card_busy_detect(card
, timeout_ms
, use_r1b_resp
, req
, gen_err
);
835 #define ERR_NOMEDIUM 3
838 #define ERR_CONTINUE 0
840 static int mmc_blk_cmd_error(struct request
*req
, const char *name
, int error
,
841 bool status_valid
, u32 status
)
845 /* response crc error, retry the r/w cmd */
846 pr_err("%s: %s sending %s command, card status %#x\n",
847 req
->rq_disk
->disk_name
, "response CRC error",
852 pr_err("%s: %s sending %s command, card status %#x\n",
853 req
->rq_disk
->disk_name
, "timed out", name
, status
);
855 /* If the status cmd initially failed, retry the r/w cmd */
860 * If it was a r/w cmd crc error, or illegal command
861 * (eg, issued in wrong state) then retry - we should
862 * have corrected the state problem above.
864 if (status
& (R1_COM_CRC_ERROR
| R1_ILLEGAL_COMMAND
))
867 /* Otherwise abort the command */
871 /* We don't understand the error code the driver gave us */
872 pr_err("%s: unknown error %d sending read/write command, card status %#x\n",
873 req
->rq_disk
->disk_name
, error
, status
);
879 * Initial r/w and stop cmd error recovery.
880 * We don't know whether the card received the r/w cmd or not, so try to
881 * restore things back to a sane state. Essentially, we do this as follows:
882 * - Obtain card status. If the first attempt to obtain card status fails,
883 * the status word will reflect the failed status cmd, not the failed
884 * r/w cmd. If we fail to obtain card status, it suggests we can no
885 * longer communicate with the card.
886 * - Check the card state. If the card received the cmd but there was a
887 * transient problem with the response, it might still be in a data transfer
888 * mode. Try to send it a stop command. If this fails, we can't recover.
889 * - If the r/w cmd failed due to a response CRC error, it was probably
890 * transient, so retry the cmd.
891 * - If the r/w cmd timed out, but we didn't get the r/w cmd status, retry.
892 * - If the r/w cmd timed out, and the r/w cmd failed due to CRC error or
893 * illegal cmd, retry.
894 * Otherwise we don't understand what happened, so abort.
896 static int mmc_blk_cmd_recovery(struct mmc_card
*card
, struct request
*req
,
897 struct mmc_blk_request
*brq
, int *ecc_err
, int *gen_err
)
899 bool prev_cmd_status_valid
= true;
900 u32 status
, stop_status
= 0;
903 if (mmc_card_removed(card
))
907 * Try to get card status which indicates both the card state
908 * and why there was no response. If the first attempt fails,
909 * we can't be sure the returned status is for the r/w command.
911 for (retry
= 2; retry
>= 0; retry
--) {
912 err
= get_card_status(card
, &status
, 0);
916 /* Re-tune if needed */
917 mmc_retune_recheck(card
->host
);
919 prev_cmd_status_valid
= false;
920 pr_err("%s: error %d sending status command, %sing\n",
921 req
->rq_disk
->disk_name
, err
, retry
? "retry" : "abort");
924 /* We couldn't get a response from the card. Give up. */
926 /* Check if the card is removed */
927 if (mmc_detect_card_removed(card
->host
))
932 /* Flag ECC errors */
933 if ((status
& R1_CARD_ECC_FAILED
) ||
934 (brq
->stop
.resp
[0] & R1_CARD_ECC_FAILED
) ||
935 (brq
->cmd
.resp
[0] & R1_CARD_ECC_FAILED
))
938 /* Flag General errors */
939 if (!mmc_host_is_spi(card
->host
) && rq_data_dir(req
) != READ
)
940 if ((status
& R1_ERROR
) ||
941 (brq
->stop
.resp
[0] & R1_ERROR
)) {
942 pr_err("%s: %s: general error sending stop or status command, stop cmd response %#x, card status %#x\n",
943 req
->rq_disk
->disk_name
, __func__
,
944 brq
->stop
.resp
[0], status
);
949 * Check the current card state. If it is in some data transfer
950 * mode, tell it to stop (and hopefully transition back to TRAN.)
952 if (R1_CURRENT_STATE(status
) == R1_STATE_DATA
||
953 R1_CURRENT_STATE(status
) == R1_STATE_RCV
) {
954 err
= send_stop(card
,
955 DIV_ROUND_UP(brq
->data
.timeout_ns
, 1000000),
956 req
, gen_err
, &stop_status
);
958 pr_err("%s: error %d sending stop command\n",
959 req
->rq_disk
->disk_name
, err
);
961 * If the stop cmd also timed out, the card is probably
962 * not present, so abort. Other errors are bad news too.
967 if (stop_status
& R1_CARD_ECC_FAILED
)
971 /* Check for set block count errors */
973 return mmc_blk_cmd_error(req
, "SET_BLOCK_COUNT", brq
->sbc
.error
,
974 prev_cmd_status_valid
, status
);
976 /* Check for r/w command errors */
978 return mmc_blk_cmd_error(req
, "r/w cmd", brq
->cmd
.error
,
979 prev_cmd_status_valid
, status
);
982 if (!brq
->stop
.error
)
985 /* Now for stop errors. These aren't fatal to the transfer. */
986 pr_info("%s: error %d sending stop command, original cmd response %#x, card status %#x\n",
987 req
->rq_disk
->disk_name
, brq
->stop
.error
,
988 brq
->cmd
.resp
[0], status
);
991 * Subsitute in our own stop status as this will give the error
992 * state which happened during the execution of the r/w command.
995 brq
->stop
.resp
[0] = stop_status
;
1001 static int mmc_blk_reset(struct mmc_blk_data
*md
, struct mmc_host
*host
,
1006 if (md
->reset_done
& type
)
1009 md
->reset_done
|= type
;
1010 err
= mmc_hw_reset(host
);
1011 /* Ensure we switch back to the correct partition */
1012 if (err
!= -EOPNOTSUPP
) {
1013 struct mmc_blk_data
*main_md
=
1014 dev_get_drvdata(&host
->card
->dev
);
1017 main_md
->part_curr
= main_md
->part_type
;
1018 part_err
= mmc_blk_part_switch(host
->card
, md
);
1021 * We have failed to get back into the correct
1022 * partition, so we need to abort the whole request.
1030 static inline void mmc_blk_reset_success(struct mmc_blk_data
*md
, int type
)
1032 md
->reset_done
&= ~type
;
1035 int mmc_access_rpmb(struct mmc_queue
*mq
)
1037 struct mmc_blk_data
*md
= mq
->data
;
1039 * If this is a RPMB partition access, return ture
1041 if (md
&& md
->part_type
== EXT_CSD_PART_CONFIG_ACC_RPMB
)
1047 static int mmc_blk_issue_discard_rq(struct mmc_queue
*mq
, struct request
*req
)
1049 struct mmc_blk_data
*md
= mq
->data
;
1050 struct mmc_card
*card
= md
->queue
.card
;
1051 unsigned int from
, nr
, arg
;
1052 int err
= 0, type
= MMC_BLK_DISCARD
;
1054 if (!mmc_can_erase(card
)) {
1059 from
= blk_rq_pos(req
);
1060 nr
= blk_rq_sectors(req
);
1062 if (mmc_can_discard(card
))
1063 arg
= MMC_DISCARD_ARG
;
1064 else if (mmc_can_trim(card
))
1067 arg
= MMC_ERASE_ARG
;
1069 if (card
->quirks
& MMC_QUIRK_INAND_CMD38
) {
1070 err
= mmc_switch(card
, EXT_CSD_CMD_SET_NORMAL
,
1071 INAND_CMD38_ARG_EXT_CSD
,
1072 arg
== MMC_TRIM_ARG
?
1073 INAND_CMD38_ARG_TRIM
:
1074 INAND_CMD38_ARG_ERASE
,
1079 err
= mmc_erase(card
, from
, nr
, arg
);
1081 if (err
== -EIO
&& !mmc_blk_reset(md
, card
->host
, type
))
1084 mmc_blk_reset_success(md
, type
);
1085 blk_end_request(req
, err
, blk_rq_bytes(req
));
1090 static int mmc_blk_issue_secdiscard_rq(struct mmc_queue
*mq
,
1091 struct request
*req
)
1093 struct mmc_blk_data
*md
= mq
->data
;
1094 struct mmc_card
*card
= md
->queue
.card
;
1095 unsigned int from
, nr
, arg
;
1096 int err
= 0, type
= MMC_BLK_SECDISCARD
;
1098 if (!(mmc_can_secure_erase_trim(card
))) {
1103 from
= blk_rq_pos(req
);
1104 nr
= blk_rq_sectors(req
);
1106 if (mmc_can_trim(card
) && !mmc_erase_group_aligned(card
, from
, nr
))
1107 arg
= MMC_SECURE_TRIM1_ARG
;
1109 arg
= MMC_SECURE_ERASE_ARG
;
1112 if (card
->quirks
& MMC_QUIRK_INAND_CMD38
) {
1113 err
= mmc_switch(card
, EXT_CSD_CMD_SET_NORMAL
,
1114 INAND_CMD38_ARG_EXT_CSD
,
1115 arg
== MMC_SECURE_TRIM1_ARG
?
1116 INAND_CMD38_ARG_SECTRIM1
:
1117 INAND_CMD38_ARG_SECERASE
,
1123 err
= mmc_erase(card
, from
, nr
, arg
);
1129 if (arg
== MMC_SECURE_TRIM1_ARG
) {
1130 if (card
->quirks
& MMC_QUIRK_INAND_CMD38
) {
1131 err
= mmc_switch(card
, EXT_CSD_CMD_SET_NORMAL
,
1132 INAND_CMD38_ARG_EXT_CSD
,
1133 INAND_CMD38_ARG_SECTRIM2
,
1139 err
= mmc_erase(card
, from
, nr
, MMC_SECURE_TRIM2_ARG
);
1147 if (err
&& !mmc_blk_reset(md
, card
->host
, type
))
1150 mmc_blk_reset_success(md
, type
);
1152 blk_end_request(req
, err
, blk_rq_bytes(req
));
1157 static int mmc_blk_issue_flush(struct mmc_queue
*mq
, struct request
*req
)
1159 struct mmc_blk_data
*md
= mq
->data
;
1160 struct mmc_card
*card
= md
->queue
.card
;
1163 ret
= mmc_flush_cache(card
);
1167 blk_end_request_all(req
, ret
);
1173 * Reformat current write as a reliable write, supporting
1174 * both legacy and the enhanced reliable write MMC cards.
1175 * In each transfer we'll handle only as much as a single
1176 * reliable write can handle, thus finish the request in
1177 * partial completions.
1179 static inline void mmc_apply_rel_rw(struct mmc_blk_request
*brq
,
1180 struct mmc_card
*card
,
1181 struct request
*req
)
1183 if (!(card
->ext_csd
.rel_param
& EXT_CSD_WR_REL_PARAM_EN
)) {
1184 /* Legacy mode imposes restrictions on transfers. */
1185 if (!IS_ALIGNED(brq
->cmd
.arg
, card
->ext_csd
.rel_sectors
))
1186 brq
->data
.blocks
= 1;
1188 if (brq
->data
.blocks
> card
->ext_csd
.rel_sectors
)
1189 brq
->data
.blocks
= card
->ext_csd
.rel_sectors
;
1190 else if (brq
->data
.blocks
< card
->ext_csd
.rel_sectors
)
1191 brq
->data
.blocks
= 1;
1195 #define CMD_ERRORS \
1196 (R1_OUT_OF_RANGE | /* Command argument out of range */ \
1197 R1_ADDRESS_ERROR | /* Misaligned address */ \
1198 R1_BLOCK_LEN_ERROR | /* Transferred block length incorrect */\
1199 R1_WP_VIOLATION | /* Tried to write to protected block */ \
1200 R1_CC_ERROR | /* Card controller error */ \
1201 R1_ERROR) /* General/unknown error */
1203 static int mmc_blk_err_check(struct mmc_card
*card
,
1204 struct mmc_async_req
*areq
)
1206 struct mmc_queue_req
*mq_mrq
= container_of(areq
, struct mmc_queue_req
,
1208 struct mmc_blk_request
*brq
= &mq_mrq
->brq
;
1209 struct request
*req
= mq_mrq
->req
;
1210 int need_retune
= card
->host
->need_retune
;
1211 int ecc_err
= 0, gen_err
= 0;
1214 * sbc.error indicates a problem with the set block count
1215 * command. No data will have been transferred.
1217 * cmd.error indicates a problem with the r/w command. No
1218 * data will have been transferred.
1220 * stop.error indicates a problem with the stop command. Data
1221 * may have been transferred, or may still be transferring.
1223 if (brq
->sbc
.error
|| brq
->cmd
.error
|| brq
->stop
.error
||
1225 switch (mmc_blk_cmd_recovery(card
, req
, brq
, &ecc_err
, &gen_err
)) {
1227 return MMC_BLK_RETRY
;
1229 return MMC_BLK_ABORT
;
1231 return MMC_BLK_NOMEDIUM
;
1238 * Check for errors relating to the execution of the
1239 * initial command - such as address errors. No data
1240 * has been transferred.
1242 if (brq
->cmd
.resp
[0] & CMD_ERRORS
) {
1243 pr_err("%s: r/w command failed, status = %#x\n",
1244 req
->rq_disk
->disk_name
, brq
->cmd
.resp
[0]);
1245 return MMC_BLK_ABORT
;
1249 * Everything else is either success, or a data error of some
1250 * kind. If it was a write, we may have transitioned to
1251 * program mode, which we have to wait for it to complete.
1253 if (!mmc_host_is_spi(card
->host
) && rq_data_dir(req
) != READ
) {
1256 /* Check stop command response */
1257 if (brq
->stop
.resp
[0] & R1_ERROR
) {
1258 pr_err("%s: %s: general error sending stop command, stop cmd response %#x\n",
1259 req
->rq_disk
->disk_name
, __func__
,
1264 err
= card_busy_detect(card
, MMC_BLK_TIMEOUT_MS
, false, req
,
1267 return MMC_BLK_CMD_ERR
;
1270 /* if general error occurs, retry the write operation. */
1272 pr_warn("%s: retrying write for general error\n",
1273 req
->rq_disk
->disk_name
);
1274 return MMC_BLK_RETRY
;
1277 if (brq
->data
.error
) {
1278 if (need_retune
&& !brq
->retune_retry_done
) {
1279 pr_info("%s: retrying because a re-tune was needed\n",
1280 req
->rq_disk
->disk_name
);
1281 brq
->retune_retry_done
= 1;
1282 return MMC_BLK_RETRY
;
1284 pr_err("%s: error %d transferring data, sector %u, nr %u, cmd response %#x, card status %#x\n",
1285 req
->rq_disk
->disk_name
, brq
->data
.error
,
1286 (unsigned)blk_rq_pos(req
),
1287 (unsigned)blk_rq_sectors(req
),
1288 brq
->cmd
.resp
[0], brq
->stop
.resp
[0]);
1290 if (rq_data_dir(req
) == READ
) {
1292 return MMC_BLK_ECC_ERR
;
1293 return MMC_BLK_DATA_ERR
;
1295 return MMC_BLK_CMD_ERR
;
1299 if (!brq
->data
.bytes_xfered
)
1300 return MMC_BLK_RETRY
;
1302 if (mmc_packed_cmd(mq_mrq
->cmd_type
)) {
1303 if (unlikely(brq
->data
.blocks
<< 9 != brq
->data
.bytes_xfered
))
1304 return MMC_BLK_PARTIAL
;
1306 return MMC_BLK_SUCCESS
;
1309 if (blk_rq_bytes(req
) != brq
->data
.bytes_xfered
)
1310 return MMC_BLK_PARTIAL
;
1312 return MMC_BLK_SUCCESS
;
1315 static int mmc_blk_packed_err_check(struct mmc_card
*card
,
1316 struct mmc_async_req
*areq
)
1318 struct mmc_queue_req
*mq_rq
= container_of(areq
, struct mmc_queue_req
,
1320 struct request
*req
= mq_rq
->req
;
1321 struct mmc_packed
*packed
= mq_rq
->packed
;
1322 int err
, check
, status
;
1328 check
= mmc_blk_err_check(card
, areq
);
1329 err
= get_card_status(card
, &status
, 0);
1331 pr_err("%s: error %d sending status command\n",
1332 req
->rq_disk
->disk_name
, err
);
1333 return MMC_BLK_ABORT
;
1336 if (status
& R1_EXCEPTION_EVENT
) {
1337 err
= mmc_get_ext_csd(card
, &ext_csd
);
1339 pr_err("%s: error %d sending ext_csd\n",
1340 req
->rq_disk
->disk_name
, err
);
1341 return MMC_BLK_ABORT
;
1344 if ((ext_csd
[EXT_CSD_EXP_EVENTS_STATUS
] &
1345 EXT_CSD_PACKED_FAILURE
) &&
1346 (ext_csd
[EXT_CSD_PACKED_CMD_STATUS
] &
1347 EXT_CSD_PACKED_GENERIC_ERROR
)) {
1348 if (ext_csd
[EXT_CSD_PACKED_CMD_STATUS
] &
1349 EXT_CSD_PACKED_INDEXED_ERROR
) {
1350 packed
->idx_failure
=
1351 ext_csd
[EXT_CSD_PACKED_FAILURE_INDEX
] - 1;
1352 check
= MMC_BLK_PARTIAL
;
1354 pr_err("%s: packed cmd failed, nr %u, sectors %u, "
1355 "failure index: %d\n",
1356 req
->rq_disk
->disk_name
, packed
->nr_entries
,
1357 packed
->blocks
, packed
->idx_failure
);
1365 static void mmc_blk_rw_rq_prep(struct mmc_queue_req
*mqrq
,
1366 struct mmc_card
*card
,
1368 struct mmc_queue
*mq
)
1370 u32 readcmd
, writecmd
;
1371 struct mmc_blk_request
*brq
= &mqrq
->brq
;
1372 struct request
*req
= mqrq
->req
;
1373 struct mmc_blk_data
*md
= mq
->data
;
1377 * Reliable writes are used to implement Forced Unit Access and
1378 * REQ_META accesses, and are supported only on MMCs.
1380 * XXX: this really needs a good explanation of why REQ_META
1381 * is treated special.
1383 bool do_rel_wr
= ((req
->cmd_flags
& REQ_FUA
) ||
1384 (req
->cmd_flags
& REQ_META
)) &&
1385 (rq_data_dir(req
) == WRITE
) &&
1386 (md
->flags
& MMC_BLK_REL_WR
);
1388 memset(brq
, 0, sizeof(struct mmc_blk_request
));
1389 brq
->mrq
.cmd
= &brq
->cmd
;
1390 brq
->mrq
.data
= &brq
->data
;
1392 brq
->cmd
.arg
= blk_rq_pos(req
);
1393 if (!mmc_card_blockaddr(card
))
1395 brq
->cmd
.flags
= MMC_RSP_SPI_R1
| MMC_RSP_R1
| MMC_CMD_ADTC
;
1396 brq
->data
.blksz
= 512;
1397 brq
->stop
.opcode
= MMC_STOP_TRANSMISSION
;
1399 brq
->data
.blocks
= blk_rq_sectors(req
);
1402 * The block layer doesn't support all sector count
1403 * restrictions, so we need to be prepared for too big
1406 if (brq
->data
.blocks
> card
->host
->max_blk_count
)
1407 brq
->data
.blocks
= card
->host
->max_blk_count
;
1409 if (brq
->data
.blocks
> 1) {
1411 * After a read error, we redo the request one sector
1412 * at a time in order to accurately determine which
1413 * sectors can be read successfully.
1416 brq
->data
.blocks
= 1;
1419 * Some controllers have HW issues while operating
1420 * in multiple I/O mode
1422 if (card
->host
->ops
->multi_io_quirk
)
1423 brq
->data
.blocks
= card
->host
->ops
->multi_io_quirk(card
,
1424 (rq_data_dir(req
) == READ
) ?
1425 MMC_DATA_READ
: MMC_DATA_WRITE
,
1429 if (brq
->data
.blocks
> 1 || do_rel_wr
) {
1430 /* SPI multiblock writes terminate using a special
1431 * token, not a STOP_TRANSMISSION request.
1433 if (!mmc_host_is_spi(card
->host
) ||
1434 rq_data_dir(req
) == READ
)
1435 brq
->mrq
.stop
= &brq
->stop
;
1436 readcmd
= MMC_READ_MULTIPLE_BLOCK
;
1437 writecmd
= MMC_WRITE_MULTIPLE_BLOCK
;
1439 brq
->mrq
.stop
= NULL
;
1440 readcmd
= MMC_READ_SINGLE_BLOCK
;
1441 writecmd
= MMC_WRITE_BLOCK
;
1443 if (rq_data_dir(req
) == READ
) {
1444 brq
->cmd
.opcode
= readcmd
;
1445 brq
->data
.flags
|= MMC_DATA_READ
;
1447 brq
->stop
.flags
= MMC_RSP_SPI_R1
| MMC_RSP_R1
|
1450 brq
->cmd
.opcode
= writecmd
;
1451 brq
->data
.flags
|= MMC_DATA_WRITE
;
1453 brq
->stop
.flags
= MMC_RSP_SPI_R1B
| MMC_RSP_R1B
|
1458 mmc_apply_rel_rw(brq
, card
, req
);
1461 * Data tag is used only during writing meta data to speed
1462 * up write and any subsequent read of this meta data
1464 do_data_tag
= (card
->ext_csd
.data_tag_unit_size
) &&
1465 (req
->cmd_flags
& REQ_META
) &&
1466 (rq_data_dir(req
) == WRITE
) &&
1467 ((brq
->data
.blocks
* brq
->data
.blksz
) >=
1468 card
->ext_csd
.data_tag_unit_size
);
1471 * Pre-defined multi-block transfers are preferable to
1472 * open ended-ones (and necessary for reliable writes).
1473 * However, it is not sufficient to just send CMD23,
1474 * and avoid the final CMD12, as on an error condition
1475 * CMD12 (stop) needs to be sent anyway. This, coupled
1476 * with Auto-CMD23 enhancements provided by some
1477 * hosts, means that the complexity of dealing
1478 * with this is best left to the host. If CMD23 is
1479 * supported by card and host, we'll fill sbc in and let
1480 * the host deal with handling it correctly. This means
1481 * that for hosts that don't expose MMC_CAP_CMD23, no
1482 * change of behavior will be observed.
1484 * N.B: Some MMC cards experience perf degradation.
1485 * We'll avoid using CMD23-bounded multiblock writes for
1486 * these, while retaining features like reliable writes.
1488 if ((md
->flags
& MMC_BLK_CMD23
) && mmc_op_multi(brq
->cmd
.opcode
) &&
1489 (do_rel_wr
|| !(card
->quirks
& MMC_QUIRK_BLK_NO_CMD23
) ||
1491 brq
->sbc
.opcode
= MMC_SET_BLOCK_COUNT
;
1492 brq
->sbc
.arg
= brq
->data
.blocks
|
1493 (do_rel_wr
? (1 << 31) : 0) |
1494 (do_data_tag
? (1 << 29) : 0);
1495 brq
->sbc
.flags
= MMC_RSP_R1
| MMC_CMD_AC
;
1496 brq
->mrq
.sbc
= &brq
->sbc
;
1499 mmc_set_data_timeout(&brq
->data
, card
);
1501 brq
->data
.sg
= mqrq
->sg
;
1502 brq
->data
.sg_len
= mmc_queue_map_sg(mq
, mqrq
);
1505 * Adjust the sg list so it is the same size as the
1508 if (brq
->data
.blocks
!= blk_rq_sectors(req
)) {
1509 int i
, data_size
= brq
->data
.blocks
<< 9;
1510 struct scatterlist
*sg
;
1512 for_each_sg(brq
->data
.sg
, sg
, brq
->data
.sg_len
, i
) {
1513 data_size
-= sg
->length
;
1514 if (data_size
<= 0) {
1515 sg
->length
+= data_size
;
1520 brq
->data
.sg_len
= i
;
1523 mqrq
->mmc_active
.mrq
= &brq
->mrq
;
1524 mqrq
->mmc_active
.err_check
= mmc_blk_err_check
;
1526 mmc_queue_bounce_pre(mqrq
);
1529 static inline u8
mmc_calc_packed_hdr_segs(struct request_queue
*q
,
1530 struct mmc_card
*card
)
1532 unsigned int hdr_sz
= mmc_large_sector(card
) ? 4096 : 512;
1533 unsigned int max_seg_sz
= queue_max_segment_size(q
);
1534 unsigned int len
, nr_segs
= 0;
1537 len
= min(hdr_sz
, max_seg_sz
);
1545 static u8
mmc_blk_prep_packed_list(struct mmc_queue
*mq
, struct request
*req
)
1547 struct request_queue
*q
= mq
->queue
;
1548 struct mmc_card
*card
= mq
->card
;
1549 struct request
*cur
= req
, *next
= NULL
;
1550 struct mmc_blk_data
*md
= mq
->data
;
1551 struct mmc_queue_req
*mqrq
= mq
->mqrq_cur
;
1552 bool en_rel_wr
= card
->ext_csd
.rel_param
& EXT_CSD_WR_REL_PARAM_EN
;
1553 unsigned int req_sectors
= 0, phys_segments
= 0;
1554 unsigned int max_blk_count
, max_phys_segs
;
1555 bool put_back
= true;
1556 u8 max_packed_rw
= 0;
1559 if (!(md
->flags
& MMC_BLK_PACKED_CMD
))
1562 if ((rq_data_dir(cur
) == WRITE
) &&
1563 mmc_host_packed_wr(card
->host
))
1564 max_packed_rw
= card
->ext_csd
.max_packed_writes
;
1566 if (max_packed_rw
== 0)
1569 if (mmc_req_rel_wr(cur
) &&
1570 (md
->flags
& MMC_BLK_REL_WR
) && !en_rel_wr
)
1573 if (mmc_large_sector(card
) &&
1574 !IS_ALIGNED(blk_rq_sectors(cur
), 8))
1577 mmc_blk_clear_packed(mqrq
);
1579 max_blk_count
= min(card
->host
->max_blk_count
,
1580 card
->host
->max_req_size
>> 9);
1581 if (unlikely(max_blk_count
> 0xffff))
1582 max_blk_count
= 0xffff;
1584 max_phys_segs
= queue_max_segments(q
);
1585 req_sectors
+= blk_rq_sectors(cur
);
1586 phys_segments
+= cur
->nr_phys_segments
;
1588 if (rq_data_dir(cur
) == WRITE
) {
1589 req_sectors
+= mmc_large_sector(card
) ? 8 : 1;
1590 phys_segments
+= mmc_calc_packed_hdr_segs(q
, card
);
1594 if (reqs
>= max_packed_rw
- 1) {
1599 spin_lock_irq(q
->queue_lock
);
1600 next
= blk_fetch_request(q
);
1601 spin_unlock_irq(q
->queue_lock
);
1607 if (mmc_large_sector(card
) &&
1608 !IS_ALIGNED(blk_rq_sectors(next
), 8))
1611 if (next
->cmd_flags
& REQ_DISCARD
||
1612 next
->cmd_flags
& REQ_FLUSH
)
1615 if (rq_data_dir(cur
) != rq_data_dir(next
))
1618 if (mmc_req_rel_wr(next
) &&
1619 (md
->flags
& MMC_BLK_REL_WR
) && !en_rel_wr
)
1622 req_sectors
+= blk_rq_sectors(next
);
1623 if (req_sectors
> max_blk_count
)
1626 phys_segments
+= next
->nr_phys_segments
;
1627 if (phys_segments
> max_phys_segs
)
1630 list_add_tail(&next
->queuelist
, &mqrq
->packed
->list
);
1636 spin_lock_irq(q
->queue_lock
);
1637 blk_requeue_request(q
, next
);
1638 spin_unlock_irq(q
->queue_lock
);
1642 list_add(&req
->queuelist
, &mqrq
->packed
->list
);
1643 mqrq
->packed
->nr_entries
= ++reqs
;
1644 mqrq
->packed
->retries
= reqs
;
1649 mqrq
->cmd_type
= MMC_PACKED_NONE
;
1653 static void mmc_blk_packed_hdr_wrq_prep(struct mmc_queue_req
*mqrq
,
1654 struct mmc_card
*card
,
1655 struct mmc_queue
*mq
)
1657 struct mmc_blk_request
*brq
= &mqrq
->brq
;
1658 struct request
*req
= mqrq
->req
;
1659 struct request
*prq
;
1660 struct mmc_blk_data
*md
= mq
->data
;
1661 struct mmc_packed
*packed
= mqrq
->packed
;
1662 bool do_rel_wr
, do_data_tag
;
1663 u32
*packed_cmd_hdr
;
1669 mqrq
->cmd_type
= MMC_PACKED_WRITE
;
1671 packed
->idx_failure
= MMC_PACKED_NR_IDX
;
1673 packed_cmd_hdr
= packed
->cmd_hdr
;
1674 memset(packed_cmd_hdr
, 0, sizeof(packed
->cmd_hdr
));
1675 packed_cmd_hdr
[0] = (packed
->nr_entries
<< 16) |
1676 (PACKED_CMD_WR
<< 8) | PACKED_CMD_VER
;
1677 hdr_blocks
= mmc_large_sector(card
) ? 8 : 1;
1680 * Argument for each entry of packed group
1682 list_for_each_entry(prq
, &packed
->list
, queuelist
) {
1683 do_rel_wr
= mmc_req_rel_wr(prq
) && (md
->flags
& MMC_BLK_REL_WR
);
1684 do_data_tag
= (card
->ext_csd
.data_tag_unit_size
) &&
1685 (prq
->cmd_flags
& REQ_META
) &&
1686 (rq_data_dir(prq
) == WRITE
) &&
1687 ((brq
->data
.blocks
* brq
->data
.blksz
) >=
1688 card
->ext_csd
.data_tag_unit_size
);
1689 /* Argument of CMD23 */
1690 packed_cmd_hdr
[(i
* 2)] =
1691 (do_rel_wr
? MMC_CMD23_ARG_REL_WR
: 0) |
1692 (do_data_tag
? MMC_CMD23_ARG_TAG_REQ
: 0) |
1693 blk_rq_sectors(prq
);
1694 /* Argument of CMD18 or CMD25 */
1695 packed_cmd_hdr
[((i
* 2)) + 1] =
1696 mmc_card_blockaddr(card
) ?
1697 blk_rq_pos(prq
) : blk_rq_pos(prq
) << 9;
1698 packed
->blocks
+= blk_rq_sectors(prq
);
1702 memset(brq
, 0, sizeof(struct mmc_blk_request
));
1703 brq
->mrq
.cmd
= &brq
->cmd
;
1704 brq
->mrq
.data
= &brq
->data
;
1705 brq
->mrq
.sbc
= &brq
->sbc
;
1706 brq
->mrq
.stop
= &brq
->stop
;
1708 brq
->sbc
.opcode
= MMC_SET_BLOCK_COUNT
;
1709 brq
->sbc
.arg
= MMC_CMD23_ARG_PACKED
| (packed
->blocks
+ hdr_blocks
);
1710 brq
->sbc
.flags
= MMC_RSP_R1
| MMC_CMD_AC
;
1712 brq
->cmd
.opcode
= MMC_WRITE_MULTIPLE_BLOCK
;
1713 brq
->cmd
.arg
= blk_rq_pos(req
);
1714 if (!mmc_card_blockaddr(card
))
1716 brq
->cmd
.flags
= MMC_RSP_SPI_R1
| MMC_RSP_R1
| MMC_CMD_ADTC
;
1718 brq
->data
.blksz
= 512;
1719 brq
->data
.blocks
= packed
->blocks
+ hdr_blocks
;
1720 brq
->data
.flags
|= MMC_DATA_WRITE
;
1722 brq
->stop
.opcode
= MMC_STOP_TRANSMISSION
;
1724 brq
->stop
.flags
= MMC_RSP_SPI_R1B
| MMC_RSP_R1B
| MMC_CMD_AC
;
1726 mmc_set_data_timeout(&brq
->data
, card
);
1728 brq
->data
.sg
= mqrq
->sg
;
1729 brq
->data
.sg_len
= mmc_queue_map_sg(mq
, mqrq
);
1731 mqrq
->mmc_active
.mrq
= &brq
->mrq
;
1732 mqrq
->mmc_active
.err_check
= mmc_blk_packed_err_check
;
1734 mmc_queue_bounce_pre(mqrq
);
1737 static int mmc_blk_cmd_err(struct mmc_blk_data
*md
, struct mmc_card
*card
,
1738 struct mmc_blk_request
*brq
, struct request
*req
,
1741 struct mmc_queue_req
*mq_rq
;
1742 mq_rq
= container_of(brq
, struct mmc_queue_req
, brq
);
1745 * If this is an SD card and we're writing, we can first
1746 * mark the known good sectors as ok.
1748 * If the card is not SD, we can still ok written sectors
1749 * as reported by the controller (which might be less than
1750 * the real number of written sectors, but never more).
1752 if (mmc_card_sd(card
)) {
1755 blocks
= mmc_sd_num_wr_blocks(card
);
1756 if (blocks
!= (u32
)-1) {
1757 ret
= blk_end_request(req
, 0, blocks
<< 9);
1760 if (!mmc_packed_cmd(mq_rq
->cmd_type
))
1761 ret
= blk_end_request(req
, 0, brq
->data
.bytes_xfered
);
1766 static int mmc_blk_end_packed_req(struct mmc_queue_req
*mq_rq
)
1768 struct request
*prq
;
1769 struct mmc_packed
*packed
= mq_rq
->packed
;
1770 int idx
= packed
->idx_failure
, i
= 0;
1775 while (!list_empty(&packed
->list
)) {
1776 prq
= list_entry_rq(packed
->list
.next
);
1778 /* retry from error index */
1779 packed
->nr_entries
-= idx
;
1783 if (packed
->nr_entries
== MMC_PACKED_NR_SINGLE
) {
1784 list_del_init(&prq
->queuelist
);
1785 mmc_blk_clear_packed(mq_rq
);
1789 list_del_init(&prq
->queuelist
);
1790 blk_end_request(prq
, 0, blk_rq_bytes(prq
));
1794 mmc_blk_clear_packed(mq_rq
);
1798 static void mmc_blk_abort_packed_req(struct mmc_queue_req
*mq_rq
)
1800 struct request
*prq
;
1801 struct mmc_packed
*packed
= mq_rq
->packed
;
1805 while (!list_empty(&packed
->list
)) {
1806 prq
= list_entry_rq(packed
->list
.next
);
1807 list_del_init(&prq
->queuelist
);
1808 blk_end_request(prq
, -EIO
, blk_rq_bytes(prq
));
1811 mmc_blk_clear_packed(mq_rq
);
1814 static void mmc_blk_revert_packed_req(struct mmc_queue
*mq
,
1815 struct mmc_queue_req
*mq_rq
)
1817 struct request
*prq
;
1818 struct request_queue
*q
= mq
->queue
;
1819 struct mmc_packed
*packed
= mq_rq
->packed
;
1823 while (!list_empty(&packed
->list
)) {
1824 prq
= list_entry_rq(packed
->list
.prev
);
1825 if (prq
->queuelist
.prev
!= &packed
->list
) {
1826 list_del_init(&prq
->queuelist
);
1827 spin_lock_irq(q
->queue_lock
);
1828 blk_requeue_request(mq
->queue
, prq
);
1829 spin_unlock_irq(q
->queue_lock
);
1831 list_del_init(&prq
->queuelist
);
1835 mmc_blk_clear_packed(mq_rq
);
1838 static int mmc_blk_issue_rw_rq(struct mmc_queue
*mq
, struct request
*rqc
)
1840 struct mmc_blk_data
*md
= mq
->data
;
1841 struct mmc_card
*card
= md
->queue
.card
;
1842 struct mmc_blk_request
*brq
= &mq
->mqrq_cur
->brq
;
1843 int ret
= 1, disable_multi
= 0, retry
= 0, type
, retune_retry_done
= 0;
1844 enum mmc_blk_status status
;
1845 struct mmc_queue_req
*mq_rq
;
1846 struct request
*req
= rqc
;
1847 struct mmc_async_req
*areq
;
1848 const u8 packed_nr
= 2;
1851 if (!rqc
&& !mq
->mqrq_prev
->req
)
1855 reqs
= mmc_blk_prep_packed_list(mq
, rqc
);
1860 * When 4KB native sector is enabled, only 8 blocks
1861 * multiple read or write is allowed
1863 if ((brq
->data
.blocks
& 0x07) &&
1864 (card
->ext_csd
.data_sector_size
== 4096)) {
1865 pr_err("%s: Transfer size is not 4KB sector size aligned\n",
1866 req
->rq_disk
->disk_name
);
1867 mq_rq
= mq
->mqrq_cur
;
1871 if (reqs
>= packed_nr
)
1872 mmc_blk_packed_hdr_wrq_prep(mq
->mqrq_cur
,
1875 mmc_blk_rw_rq_prep(mq
->mqrq_cur
, card
, 0, mq
);
1876 areq
= &mq
->mqrq_cur
->mmc_active
;
1879 areq
= mmc_start_req(card
->host
, areq
, (int *) &status
);
1881 if (status
== MMC_BLK_NEW_REQUEST
)
1882 mq
->flags
|= MMC_QUEUE_NEW_REQUEST
;
1886 mq_rq
= container_of(areq
, struct mmc_queue_req
, mmc_active
);
1889 type
= rq_data_dir(req
) == READ
? MMC_BLK_READ
: MMC_BLK_WRITE
;
1890 mmc_queue_bounce_post(mq_rq
);
1893 case MMC_BLK_SUCCESS
:
1894 case MMC_BLK_PARTIAL
:
1896 * A block was successfully transferred.
1898 mmc_blk_reset_success(md
, type
);
1900 if (mmc_packed_cmd(mq_rq
->cmd_type
)) {
1901 ret
= mmc_blk_end_packed_req(mq_rq
);
1904 ret
= blk_end_request(req
, 0,
1905 brq
->data
.bytes_xfered
);
1909 * If the blk_end_request function returns non-zero even
1910 * though all data has been transferred and no errors
1911 * were returned by the host controller, it's a bug.
1913 if (status
== MMC_BLK_SUCCESS
&& ret
) {
1914 pr_err("%s BUG rq_tot %d d_xfer %d\n",
1915 __func__
, blk_rq_bytes(req
),
1916 brq
->data
.bytes_xfered
);
1921 case MMC_BLK_CMD_ERR
:
1922 ret
= mmc_blk_cmd_err(md
, card
, brq
, req
, ret
);
1923 if (!mmc_blk_reset(md
, card
->host
, type
))
1927 retune_retry_done
= brq
->retune_retry_done
;
1932 if (!mmc_blk_reset(md
, card
->host
, type
))
1935 case MMC_BLK_DATA_ERR
: {
1938 err
= mmc_blk_reset(md
, card
->host
, type
);
1941 if (err
== -ENODEV
||
1942 mmc_packed_cmd(mq_rq
->cmd_type
))
1946 case MMC_BLK_ECC_ERR
:
1947 if (brq
->data
.blocks
> 1) {
1948 /* Redo read one sector at a time */
1949 pr_warn("%s: retrying using single block read\n",
1950 req
->rq_disk
->disk_name
);
1955 * After an error, we redo I/O one sector at a
1956 * time, so we only reach here after trying to
1957 * read a single sector.
1959 ret
= blk_end_request(req
, -EIO
,
1964 case MMC_BLK_NOMEDIUM
:
1967 pr_err("%s: Unhandled return value (%d)",
1968 req
->rq_disk
->disk_name
, status
);
1973 if (mmc_packed_cmd(mq_rq
->cmd_type
)) {
1974 if (!mq_rq
->packed
->retries
)
1976 mmc_blk_packed_hdr_wrq_prep(mq_rq
, card
, mq
);
1977 mmc_start_req(card
->host
,
1978 &mq_rq
->mmc_active
, NULL
);
1982 * In case of a incomplete request
1983 * prepare it again and resend.
1985 mmc_blk_rw_rq_prep(mq_rq
, card
,
1987 mmc_start_req(card
->host
,
1988 &mq_rq
->mmc_active
, NULL
);
1990 mq_rq
->brq
.retune_retry_done
= retune_retry_done
;
1997 if (mmc_packed_cmd(mq_rq
->cmd_type
)) {
1998 mmc_blk_abort_packed_req(mq_rq
);
2000 if (mmc_card_removed(card
))
2001 req
->cmd_flags
|= REQ_QUIET
;
2003 ret
= blk_end_request(req
, -EIO
,
2004 blk_rq_cur_bytes(req
));
2009 if (mmc_card_removed(card
)) {
2010 rqc
->cmd_flags
|= REQ_QUIET
;
2011 blk_end_request_all(rqc
, -EIO
);
2014 * If current request is packed, it needs to put back.
2016 if (mmc_packed_cmd(mq
->mqrq_cur
->cmd_type
))
2017 mmc_blk_revert_packed_req(mq
, mq
->mqrq_cur
);
2019 mmc_blk_rw_rq_prep(mq
->mqrq_cur
, card
, 0, mq
);
2020 mmc_start_req(card
->host
,
2021 &mq
->mqrq_cur
->mmc_active
, NULL
);
2028 static int mmc_blk_issue_rq(struct mmc_queue
*mq
, struct request
*req
)
2031 struct mmc_blk_data
*md
= mq
->data
;
2032 struct mmc_card
*card
= md
->queue
.card
;
2033 struct mmc_host
*host
= card
->host
;
2034 unsigned long flags
;
2035 unsigned int cmd_flags
= req
? req
->cmd_flags
: 0;
2037 if (req
&& !mq
->mqrq_prev
->req
)
2038 /* claim host only for the first request */
2041 ret
= mmc_blk_part_switch(card
, md
);
2044 blk_end_request_all(req
, -EIO
);
2050 mq
->flags
&= ~MMC_QUEUE_NEW_REQUEST
;
2051 if (cmd_flags
& REQ_DISCARD
) {
2052 /* complete ongoing async transfer before issuing discard */
2053 if (card
->host
->areq
)
2054 mmc_blk_issue_rw_rq(mq
, NULL
);
2055 if (req
->cmd_flags
& REQ_SECURE
)
2056 ret
= mmc_blk_issue_secdiscard_rq(mq
, req
);
2058 ret
= mmc_blk_issue_discard_rq(mq
, req
);
2059 } else if (cmd_flags
& REQ_FLUSH
) {
2060 /* complete ongoing async transfer before issuing flush */
2061 if (card
->host
->areq
)
2062 mmc_blk_issue_rw_rq(mq
, NULL
);
2063 ret
= mmc_blk_issue_flush(mq
, req
);
2065 if (!req
&& host
->areq
) {
2066 spin_lock_irqsave(&host
->context_info
.lock
, flags
);
2067 host
->context_info
.is_waiting_last_req
= true;
2068 spin_unlock_irqrestore(&host
->context_info
.lock
, flags
);
2070 ret
= mmc_blk_issue_rw_rq(mq
, req
);
2074 if ((!req
&& !(mq
->flags
& MMC_QUEUE_NEW_REQUEST
)) ||
2075 (cmd_flags
& MMC_REQ_SPECIAL_MASK
))
2077 * Release host when there are no more requests
2078 * and after special request(discard, flush) is done.
2079 * In case sepecial request, there is no reentry to
2080 * the 'mmc_blk_issue_rq' with 'mqrq_prev->req'.
2086 static inline int mmc_blk_readonly(struct mmc_card
*card
)
2088 return mmc_card_readonly(card
) ||
2089 !(card
->csd
.cmdclass
& CCC_BLOCK_WRITE
);
2092 static struct mmc_blk_data
*mmc_blk_alloc_req(struct mmc_card
*card
,
2093 struct device
*parent
,
2096 const char *subname
,
2099 struct mmc_blk_data
*md
;
2102 devidx
= find_first_zero_bit(dev_use
, max_devices
);
2103 if (devidx
>= max_devices
)
2104 return ERR_PTR(-ENOSPC
);
2105 __set_bit(devidx
, dev_use
);
2107 md
= kzalloc(sizeof(struct mmc_blk_data
), GFP_KERNEL
);
2114 * !subname implies we are creating main mmc_blk_data that will be
2115 * associated with mmc_card with dev_set_drvdata. Due to device
2116 * partitions, devidx will not coincide with a per-physical card
2117 * index anymore so we keep track of a name index.
2120 md
->name_idx
= find_first_zero_bit(name_use
, max_devices
);
2121 __set_bit(md
->name_idx
, name_use
);
2123 md
->name_idx
= ((struct mmc_blk_data
*)
2124 dev_to_disk(parent
)->private_data
)->name_idx
;
2126 md
->area_type
= area_type
;
2129 * Set the read-only status based on the supported commands
2130 * and the write protect switch.
2132 md
->read_only
= mmc_blk_readonly(card
);
2134 md
->disk
= alloc_disk(perdev_minors
);
2135 if (md
->disk
== NULL
) {
2140 spin_lock_init(&md
->lock
);
2141 INIT_LIST_HEAD(&md
->part
);
2144 ret
= mmc_init_queue(&md
->queue
, card
, &md
->lock
, subname
);
2148 md
->queue
.issue_fn
= mmc_blk_issue_rq
;
2149 md
->queue
.data
= md
;
2151 md
->disk
->major
= MMC_BLOCK_MAJOR
;
2152 md
->disk
->first_minor
= devidx
* perdev_minors
;
2153 md
->disk
->fops
= &mmc_bdops
;
2154 md
->disk
->private_data
= md
;
2155 md
->disk
->queue
= md
->queue
.queue
;
2156 md
->disk
->driverfs_dev
= parent
;
2157 set_disk_ro(md
->disk
, md
->read_only
|| default_ro
);
2158 if (area_type
& (MMC_BLK_DATA_AREA_RPMB
| MMC_BLK_DATA_AREA_BOOT
))
2159 md
->disk
->flags
|= GENHD_FL_NO_PART_SCAN
;
2162 * As discussed on lkml, GENHD_FL_REMOVABLE should:
2164 * - be set for removable media with permanent block devices
2165 * - be unset for removable block devices with permanent media
2167 * Since MMC block devices clearly fall under the second
2168 * case, we do not set GENHD_FL_REMOVABLE. Userspace
2169 * should use the block device creation/destruction hotplug
2170 * messages to tell when the card is present.
2173 snprintf(md
->disk
->disk_name
, sizeof(md
->disk
->disk_name
),
2174 "mmcblk%u%s", md
->name_idx
, subname
? subname
: "");
2176 if (mmc_card_mmc(card
))
2177 blk_queue_logical_block_size(md
->queue
.queue
,
2178 card
->ext_csd
.data_sector_size
);
2180 blk_queue_logical_block_size(md
->queue
.queue
, 512);
2182 set_capacity(md
->disk
, size
);
2184 if (mmc_host_cmd23(card
->host
)) {
2185 if (mmc_card_mmc(card
) ||
2186 (mmc_card_sd(card
) &&
2187 card
->scr
.cmds
& SD_SCR_CMD23_SUPPORT
))
2188 md
->flags
|= MMC_BLK_CMD23
;
2191 if (mmc_card_mmc(card
) &&
2192 md
->flags
& MMC_BLK_CMD23
&&
2193 ((card
->ext_csd
.rel_param
& EXT_CSD_WR_REL_PARAM_EN
) ||
2194 card
->ext_csd
.rel_sectors
)) {
2195 md
->flags
|= MMC_BLK_REL_WR
;
2196 blk_queue_flush(md
->queue
.queue
, REQ_FLUSH
| REQ_FUA
);
2199 if (mmc_card_mmc(card
) &&
2200 (area_type
== MMC_BLK_DATA_AREA_MAIN
) &&
2201 (md
->flags
& MMC_BLK_CMD23
) &&
2202 card
->ext_csd
.packed_event_en
) {
2203 if (!mmc_packed_init(&md
->queue
, card
))
2204 md
->flags
|= MMC_BLK_PACKED_CMD
;
2214 return ERR_PTR(ret
);
2217 static struct mmc_blk_data
*mmc_blk_alloc(struct mmc_card
*card
)
2221 if (!mmc_card_sd(card
) && mmc_card_blockaddr(card
)) {
2223 * The EXT_CSD sector count is in number or 512 byte
2226 size
= card
->ext_csd
.sectors
;
2229 * The CSD capacity field is in units of read_blkbits.
2230 * set_capacity takes units of 512 bytes.
2232 size
= card
->csd
.capacity
<< (card
->csd
.read_blkbits
- 9);
2235 return mmc_blk_alloc_req(card
, &card
->dev
, size
, false, NULL
,
2236 MMC_BLK_DATA_AREA_MAIN
);
2239 static int mmc_blk_alloc_part(struct mmc_card
*card
,
2240 struct mmc_blk_data
*md
,
2241 unsigned int part_type
,
2244 const char *subname
,
2248 struct mmc_blk_data
*part_md
;
2250 part_md
= mmc_blk_alloc_req(card
, disk_to_dev(md
->disk
), size
, default_ro
,
2251 subname
, area_type
);
2252 if (IS_ERR(part_md
))
2253 return PTR_ERR(part_md
);
2254 part_md
->part_type
= part_type
;
2255 list_add(&part_md
->part
, &md
->part
);
2257 string_get_size((u64
)get_capacity(part_md
->disk
), 512, STRING_UNITS_2
,
2258 cap_str
, sizeof(cap_str
));
2259 pr_info("%s: %s %s partition %u %s\n",
2260 part_md
->disk
->disk_name
, mmc_card_id(card
),
2261 mmc_card_name(card
), part_md
->part_type
, cap_str
);
2265 /* MMC Physical partitions consist of two boot partitions and
2266 * up to four general purpose partitions.
2267 * For each partition enabled in EXT_CSD a block device will be allocatedi
2268 * to provide access to the partition.
2271 static int mmc_blk_alloc_parts(struct mmc_card
*card
, struct mmc_blk_data
*md
)
2275 if (!mmc_card_mmc(card
))
2278 for (idx
= 0; idx
< card
->nr_parts
; idx
++) {
2279 if (card
->part
[idx
].size
) {
2280 ret
= mmc_blk_alloc_part(card
, md
,
2281 card
->part
[idx
].part_cfg
,
2282 card
->part
[idx
].size
>> 9,
2283 card
->part
[idx
].force_ro
,
2284 card
->part
[idx
].name
,
2285 card
->part
[idx
].area_type
);
2294 static void mmc_blk_remove_req(struct mmc_blk_data
*md
)
2296 struct mmc_card
*card
;
2300 * Flush remaining requests and free queues. It
2301 * is freeing the queue that stops new requests
2302 * from being accepted.
2304 card
= md
->queue
.card
;
2305 mmc_cleanup_queue(&md
->queue
);
2306 if (md
->flags
& MMC_BLK_PACKED_CMD
)
2307 mmc_packed_clean(&md
->queue
);
2308 if (md
->disk
->flags
& GENHD_FL_UP
) {
2309 device_remove_file(disk_to_dev(md
->disk
), &md
->force_ro
);
2310 if ((md
->area_type
& MMC_BLK_DATA_AREA_BOOT
) &&
2311 card
->ext_csd
.boot_ro_lockable
)
2312 device_remove_file(disk_to_dev(md
->disk
),
2313 &md
->power_ro_lock
);
2315 del_gendisk(md
->disk
);
2321 static void mmc_blk_remove_parts(struct mmc_card
*card
,
2322 struct mmc_blk_data
*md
)
2324 struct list_head
*pos
, *q
;
2325 struct mmc_blk_data
*part_md
;
2327 __clear_bit(md
->name_idx
, name_use
);
2328 list_for_each_safe(pos
, q
, &md
->part
) {
2329 part_md
= list_entry(pos
, struct mmc_blk_data
, part
);
2331 mmc_blk_remove_req(part_md
);
2335 static int mmc_add_disk(struct mmc_blk_data
*md
)
2338 struct mmc_card
*card
= md
->queue
.card
;
2341 md
->force_ro
.show
= force_ro_show
;
2342 md
->force_ro
.store
= force_ro_store
;
2343 sysfs_attr_init(&md
->force_ro
.attr
);
2344 md
->force_ro
.attr
.name
= "force_ro";
2345 md
->force_ro
.attr
.mode
= S_IRUGO
| S_IWUSR
;
2346 ret
= device_create_file(disk_to_dev(md
->disk
), &md
->force_ro
);
2350 if ((md
->area_type
& MMC_BLK_DATA_AREA_BOOT
) &&
2351 card
->ext_csd
.boot_ro_lockable
) {
2354 if (card
->ext_csd
.boot_ro_lock
& EXT_CSD_BOOT_WP_B_PWR_WP_DIS
)
2357 mode
= S_IRUGO
| S_IWUSR
;
2359 md
->power_ro_lock
.show
= power_ro_lock_show
;
2360 md
->power_ro_lock
.store
= power_ro_lock_store
;
2361 sysfs_attr_init(&md
->power_ro_lock
.attr
);
2362 md
->power_ro_lock
.attr
.mode
= mode
;
2363 md
->power_ro_lock
.attr
.name
=
2364 "ro_lock_until_next_power_on";
2365 ret
= device_create_file(disk_to_dev(md
->disk
),
2366 &md
->power_ro_lock
);
2368 goto power_ro_lock_fail
;
2373 device_remove_file(disk_to_dev(md
->disk
), &md
->force_ro
);
2375 del_gendisk(md
->disk
);
2380 #define CID_MANFID_SANDISK 0x2
2381 #define CID_MANFID_TOSHIBA 0x11
2382 #define CID_MANFID_MICRON 0x13
2383 #define CID_MANFID_SAMSUNG 0x15
2385 static const struct mmc_fixup blk_fixups
[] =
2387 MMC_FIXUP("SEM02G", CID_MANFID_SANDISK
, 0x100, add_quirk
,
2388 MMC_QUIRK_INAND_CMD38
),
2389 MMC_FIXUP("SEM04G", CID_MANFID_SANDISK
, 0x100, add_quirk
,
2390 MMC_QUIRK_INAND_CMD38
),
2391 MMC_FIXUP("SEM08G", CID_MANFID_SANDISK
, 0x100, add_quirk
,
2392 MMC_QUIRK_INAND_CMD38
),
2393 MMC_FIXUP("SEM16G", CID_MANFID_SANDISK
, 0x100, add_quirk
,
2394 MMC_QUIRK_INAND_CMD38
),
2395 MMC_FIXUP("SEM32G", CID_MANFID_SANDISK
, 0x100, add_quirk
,
2396 MMC_QUIRK_INAND_CMD38
),
2399 * Some MMC cards experience performance degradation with CMD23
2400 * instead of CMD12-bounded multiblock transfers. For now we'll
2401 * black list what's bad...
2402 * - Certain Toshiba cards.
2404 * N.B. This doesn't affect SD cards.
2406 MMC_FIXUP("MMC08G", CID_MANFID_TOSHIBA
, CID_OEMID_ANY
, add_quirk_mmc
,
2407 MMC_QUIRK_BLK_NO_CMD23
),
2408 MMC_FIXUP("MMC16G", CID_MANFID_TOSHIBA
, CID_OEMID_ANY
, add_quirk_mmc
,
2409 MMC_QUIRK_BLK_NO_CMD23
),
2410 MMC_FIXUP("MMC32G", CID_MANFID_TOSHIBA
, CID_OEMID_ANY
, add_quirk_mmc
,
2411 MMC_QUIRK_BLK_NO_CMD23
),
2414 * Some Micron MMC cards needs longer data read timeout than
2417 MMC_FIXUP(CID_NAME_ANY
, CID_MANFID_MICRON
, 0x200, add_quirk_mmc
,
2418 MMC_QUIRK_LONG_READ_TIME
),
2421 * On these Samsung MoviNAND parts, performing secure erase or
2422 * secure trim can result in unrecoverable corruption due to a
2425 MMC_FIXUP("M8G2FA", CID_MANFID_SAMSUNG
, CID_OEMID_ANY
, add_quirk_mmc
,
2426 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN
),
2427 MMC_FIXUP("MAG4FA", CID_MANFID_SAMSUNG
, CID_OEMID_ANY
, add_quirk_mmc
,
2428 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN
),
2429 MMC_FIXUP("MBG8FA", CID_MANFID_SAMSUNG
, CID_OEMID_ANY
, add_quirk_mmc
,
2430 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN
),
2431 MMC_FIXUP("MCGAFA", CID_MANFID_SAMSUNG
, CID_OEMID_ANY
, add_quirk_mmc
,
2432 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN
),
2433 MMC_FIXUP("VAL00M", CID_MANFID_SAMSUNG
, CID_OEMID_ANY
, add_quirk_mmc
,
2434 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN
),
2435 MMC_FIXUP("VYL00M", CID_MANFID_SAMSUNG
, CID_OEMID_ANY
, add_quirk_mmc
,
2436 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN
),
2437 MMC_FIXUP("KYL00M", CID_MANFID_SAMSUNG
, CID_OEMID_ANY
, add_quirk_mmc
,
2438 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN
),
2439 MMC_FIXUP("VZL00M", CID_MANFID_SAMSUNG
, CID_OEMID_ANY
, add_quirk_mmc
,
2440 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN
),
2445 static int mmc_blk_probe(struct mmc_card
*card
)
2447 struct mmc_blk_data
*md
, *part_md
;
2451 * Check that the card supports the command class(es) we need.
2453 if (!(card
->csd
.cmdclass
& CCC_BLOCK_READ
))
2456 mmc_fixup_device(card
, blk_fixups
);
2458 md
= mmc_blk_alloc(card
);
2462 string_get_size((u64
)get_capacity(md
->disk
), 512, STRING_UNITS_2
,
2463 cap_str
, sizeof(cap_str
));
2464 pr_info("%s: %s %s %s %s\n",
2465 md
->disk
->disk_name
, mmc_card_id(card
), mmc_card_name(card
),
2466 cap_str
, md
->read_only
? "(ro)" : "");
2468 if (mmc_blk_alloc_parts(card
, md
))
2471 dev_set_drvdata(&card
->dev
, md
);
2473 if (mmc_add_disk(md
))
2476 list_for_each_entry(part_md
, &md
->part
, part
) {
2477 if (mmc_add_disk(part_md
))
2481 pm_runtime_set_autosuspend_delay(&card
->dev
, 3000);
2482 pm_runtime_use_autosuspend(&card
->dev
);
2485 * Don't enable runtime PM for SD-combo cards here. Leave that
2486 * decision to be taken during the SDIO init sequence instead.
2488 if (card
->type
!= MMC_TYPE_SD_COMBO
) {
2489 pm_runtime_set_active(&card
->dev
);
2490 pm_runtime_enable(&card
->dev
);
2496 mmc_blk_remove_parts(card
, md
);
2497 mmc_blk_remove_req(md
);
2501 static void mmc_blk_remove(struct mmc_card
*card
)
2503 struct mmc_blk_data
*md
= dev_get_drvdata(&card
->dev
);
2505 mmc_blk_remove_parts(card
, md
);
2506 pm_runtime_get_sync(&card
->dev
);
2507 mmc_claim_host(card
->host
);
2508 mmc_blk_part_switch(card
, md
);
2509 mmc_release_host(card
->host
);
2510 if (card
->type
!= MMC_TYPE_SD_COMBO
)
2511 pm_runtime_disable(&card
->dev
);
2512 pm_runtime_put_noidle(&card
->dev
);
2513 mmc_blk_remove_req(md
);
2514 dev_set_drvdata(&card
->dev
, NULL
);
2517 static int _mmc_blk_suspend(struct mmc_card
*card
)
2519 struct mmc_blk_data
*part_md
;
2520 struct mmc_blk_data
*md
= dev_get_drvdata(&card
->dev
);
2523 mmc_queue_suspend(&md
->queue
);
2524 list_for_each_entry(part_md
, &md
->part
, part
) {
2525 mmc_queue_suspend(&part_md
->queue
);
2531 static void mmc_blk_shutdown(struct mmc_card
*card
)
2533 _mmc_blk_suspend(card
);
2536 #ifdef CONFIG_PM_SLEEP
2537 static int mmc_blk_suspend(struct device
*dev
)
2539 struct mmc_card
*card
= mmc_dev_to_card(dev
);
2541 return _mmc_blk_suspend(card
);
2544 static int mmc_blk_resume(struct device
*dev
)
2546 struct mmc_blk_data
*part_md
;
2547 struct mmc_blk_data
*md
= dev_get_drvdata(dev
);
2551 * Resume involves the card going into idle state,
2552 * so current partition is always the main one.
2554 md
->part_curr
= md
->part_type
;
2555 mmc_queue_resume(&md
->queue
);
2556 list_for_each_entry(part_md
, &md
->part
, part
) {
2557 mmc_queue_resume(&part_md
->queue
);
2564 static SIMPLE_DEV_PM_OPS(mmc_blk_pm_ops
, mmc_blk_suspend
, mmc_blk_resume
);
2566 static struct mmc_driver mmc_driver
= {
2569 .pm
= &mmc_blk_pm_ops
,
2571 .probe
= mmc_blk_probe
,
2572 .remove
= mmc_blk_remove
,
2573 .shutdown
= mmc_blk_shutdown
,
2576 static int __init
mmc_blk_init(void)
2580 if (perdev_minors
!= CONFIG_MMC_BLOCK_MINORS
)
2581 pr_info("mmcblk: using %d minors per device\n", perdev_minors
);
2583 max_devices
= min(MAX_DEVICES
, (1 << MINORBITS
) / perdev_minors
);
2585 res
= register_blkdev(MMC_BLOCK_MAJOR
, "mmc");
2589 res
= mmc_register_driver(&mmc_driver
);
2595 unregister_blkdev(MMC_BLOCK_MAJOR
, "mmc");
2600 static void __exit
mmc_blk_exit(void)
2602 mmc_unregister_driver(&mmc_driver
);
2603 unregister_blkdev(MMC_BLOCK_MAJOR
, "mmc");
2606 module_init(mmc_blk_init
);
2607 module_exit(mmc_blk_exit
);
2609 MODULE_LICENSE("GPL");
2610 MODULE_DESCRIPTION("Multimedia Card (MMC) block device driver");