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>
38 #include <linux/idr.h>
40 #include <linux/mmc/ioctl.h>
41 #include <linux/mmc/card.h>
42 #include <linux/mmc/host.h>
43 #include <linux/mmc/mmc.h>
44 #include <linux/mmc/sd.h>
46 #include <asm/uaccess.h>
50 MODULE_ALIAS("mmc:block");
51 #ifdef MODULE_PARAM_PREFIX
52 #undef MODULE_PARAM_PREFIX
54 #define MODULE_PARAM_PREFIX "mmcblk."
56 #define INAND_CMD38_ARG_EXT_CSD 113
57 #define INAND_CMD38_ARG_ERASE 0x00
58 #define INAND_CMD38_ARG_TRIM 0x01
59 #define INAND_CMD38_ARG_SECERASE 0x80
60 #define INAND_CMD38_ARG_SECTRIM1 0x81
61 #define INAND_CMD38_ARG_SECTRIM2 0x88
62 #define MMC_BLK_TIMEOUT_MS (10 * 60 * 1000) /* 10 minute timeout */
63 #define MMC_SANITIZE_REQ_TIMEOUT 240000
64 #define MMC_EXTRACT_INDEX_FROM_ARG(x) ((x & 0x00FF0000) >> 16)
66 #define mmc_req_rel_wr(req) ((req->cmd_flags & REQ_FUA) && \
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 * limited by the MAX_DEVICES below.
84 static int max_devices
;
86 #define MAX_DEVICES 256
88 static DEFINE_IDA(mmc_blk_ida
);
89 static DEFINE_SPINLOCK(mmc_blk_lock
);
92 * There is one mmc_blk_data per slot.
97 struct mmc_queue queue
;
98 struct list_head part
;
101 #define MMC_BLK_CMD23 (1 << 0) /* Can do SET_BLOCK_COUNT for multiblock */
102 #define MMC_BLK_REL_WR (1 << 1) /* MMC Reliable write support */
103 #define MMC_BLK_PACKED_CMD (1 << 2) /* MMC packed command support */
106 unsigned int read_only
;
107 unsigned int part_type
;
108 unsigned int reset_done
;
109 #define MMC_BLK_READ BIT(0)
110 #define MMC_BLK_WRITE BIT(1)
111 #define MMC_BLK_DISCARD BIT(2)
112 #define MMC_BLK_SECDISCARD BIT(3)
115 * Only set in main mmc_blk_data associated
116 * with mmc_card with dev_set_drvdata, and keeps
117 * track of the current selected device partition.
119 unsigned int part_curr
;
120 struct device_attribute force_ro
;
121 struct device_attribute power_ro_lock
;
125 static DEFINE_MUTEX(open_lock
);
128 MMC_PACKED_NR_IDX
= -1,
130 MMC_PACKED_NR_SINGLE
,
133 module_param(perdev_minors
, int, 0444);
134 MODULE_PARM_DESC(perdev_minors
, "Minors numbers to allocate per device");
136 static inline int mmc_blk_part_switch(struct mmc_card
*card
,
137 struct mmc_blk_data
*md
);
138 static int get_card_status(struct mmc_card
*card
, u32
*status
, int retries
);
140 static inline void mmc_blk_clear_packed(struct mmc_queue_req
*mqrq
)
142 struct mmc_packed
*packed
= mqrq
->packed
;
146 mqrq
->cmd_type
= MMC_PACKED_NONE
;
147 packed
->nr_entries
= MMC_PACKED_NR_ZERO
;
148 packed
->idx_failure
= MMC_PACKED_NR_IDX
;
153 static struct mmc_blk_data
*mmc_blk_get(struct gendisk
*disk
)
155 struct mmc_blk_data
*md
;
157 mutex_lock(&open_lock
);
158 md
= disk
->private_data
;
159 if (md
&& md
->usage
== 0)
163 mutex_unlock(&open_lock
);
168 static inline int mmc_get_devidx(struct gendisk
*disk
)
170 int devidx
= disk
->first_minor
/ perdev_minors
;
174 static void mmc_blk_put(struct mmc_blk_data
*md
)
176 mutex_lock(&open_lock
);
178 if (md
->usage
== 0) {
179 int devidx
= mmc_get_devidx(md
->disk
);
180 blk_cleanup_queue(md
->queue
.queue
);
182 spin_lock(&mmc_blk_lock
);
183 ida_remove(&mmc_blk_ida
, devidx
);
184 spin_unlock(&mmc_blk_lock
);
189 mutex_unlock(&open_lock
);
192 static ssize_t
power_ro_lock_show(struct device
*dev
,
193 struct device_attribute
*attr
, char *buf
)
196 struct mmc_blk_data
*md
= mmc_blk_get(dev_to_disk(dev
));
197 struct mmc_card
*card
= md
->queue
.card
;
200 if (card
->ext_csd
.boot_ro_lock
& EXT_CSD_BOOT_WP_B_PERM_WP_EN
)
202 else if (card
->ext_csd
.boot_ro_lock
& EXT_CSD_BOOT_WP_B_PWR_WP_EN
)
205 ret
= snprintf(buf
, PAGE_SIZE
, "%d\n", locked
);
212 static ssize_t
power_ro_lock_store(struct device
*dev
,
213 struct device_attribute
*attr
, const char *buf
, size_t count
)
216 struct mmc_blk_data
*md
, *part_md
;
217 struct mmc_card
*card
;
220 if (kstrtoul(buf
, 0, &set
))
226 md
= mmc_blk_get(dev_to_disk(dev
));
227 card
= md
->queue
.card
;
231 ret
= mmc_switch(card
, EXT_CSD_CMD_SET_NORMAL
, EXT_CSD_BOOT_WP
,
232 card
->ext_csd
.boot_ro_lock
|
233 EXT_CSD_BOOT_WP_B_PWR_WP_EN
,
234 card
->ext_csd
.part_time
);
236 pr_err("%s: Locking boot partition ro until next power on failed: %d\n", md
->disk
->disk_name
, ret
);
238 card
->ext_csd
.boot_ro_lock
|= EXT_CSD_BOOT_WP_B_PWR_WP_EN
;
243 pr_info("%s: Locking boot partition ro until next power on\n",
244 md
->disk
->disk_name
);
245 set_disk_ro(md
->disk
, 1);
247 list_for_each_entry(part_md
, &md
->part
, part
)
248 if (part_md
->area_type
== MMC_BLK_DATA_AREA_BOOT
) {
249 pr_info("%s: Locking boot partition ro until next power on\n", part_md
->disk
->disk_name
);
250 set_disk_ro(part_md
->disk
, 1);
258 static ssize_t
force_ro_show(struct device
*dev
, struct device_attribute
*attr
,
262 struct mmc_blk_data
*md
= mmc_blk_get(dev_to_disk(dev
));
264 ret
= snprintf(buf
, PAGE_SIZE
, "%d\n",
265 get_disk_ro(dev_to_disk(dev
)) ^
271 static ssize_t
force_ro_store(struct device
*dev
, struct device_attribute
*attr
,
272 const char *buf
, size_t count
)
276 struct mmc_blk_data
*md
= mmc_blk_get(dev_to_disk(dev
));
277 unsigned long set
= simple_strtoul(buf
, &end
, 0);
283 set_disk_ro(dev_to_disk(dev
), set
|| md
->read_only
);
290 static int mmc_blk_open(struct block_device
*bdev
, fmode_t mode
)
292 struct mmc_blk_data
*md
= mmc_blk_get(bdev
->bd_disk
);
295 mutex_lock(&block_mutex
);
298 check_disk_change(bdev
);
301 if ((mode
& FMODE_WRITE
) && md
->read_only
) {
306 mutex_unlock(&block_mutex
);
311 static void mmc_blk_release(struct gendisk
*disk
, fmode_t mode
)
313 struct mmc_blk_data
*md
= disk
->private_data
;
315 mutex_lock(&block_mutex
);
317 mutex_unlock(&block_mutex
);
321 mmc_blk_getgeo(struct block_device
*bdev
, struct hd_geometry
*geo
)
323 geo
->cylinders
= get_capacity(bdev
->bd_disk
) / (4 * 16);
329 struct mmc_blk_ioc_data
{
330 struct mmc_ioc_cmd ic
;
335 static struct mmc_blk_ioc_data
*mmc_blk_ioctl_copy_from_user(
336 struct mmc_ioc_cmd __user
*user
)
338 struct mmc_blk_ioc_data
*idata
;
341 idata
= kmalloc(sizeof(*idata
), GFP_KERNEL
);
347 if (copy_from_user(&idata
->ic
, user
, sizeof(idata
->ic
))) {
352 idata
->buf_bytes
= (u64
) idata
->ic
.blksz
* idata
->ic
.blocks
;
353 if (idata
->buf_bytes
> MMC_IOC_MAX_BYTES
) {
358 if (!idata
->buf_bytes
) {
363 idata
->buf
= kmalloc(idata
->buf_bytes
, GFP_KERNEL
);
369 if (copy_from_user(idata
->buf
, (void __user
*)(unsigned long)
370 idata
->ic
.data_ptr
, idata
->buf_bytes
)) {
385 static int mmc_blk_ioctl_copy_to_user(struct mmc_ioc_cmd __user
*ic_ptr
,
386 struct mmc_blk_ioc_data
*idata
)
388 struct mmc_ioc_cmd
*ic
= &idata
->ic
;
390 if (copy_to_user(&(ic_ptr
->response
), ic
->response
,
391 sizeof(ic
->response
)))
394 if (!idata
->ic
.write_flag
) {
395 if (copy_to_user((void __user
*)(unsigned long)ic
->data_ptr
,
396 idata
->buf
, idata
->buf_bytes
))
403 static int ioctl_rpmb_card_status_poll(struct mmc_card
*card
, u32
*status
,
409 if (!status
|| !retries_max
)
413 err
= get_card_status(card
, status
, 5);
417 if (!R1_STATUS(*status
) &&
418 (R1_CURRENT_STATE(*status
) != R1_STATE_PRG
))
419 break; /* RPMB programming operation complete */
422 * Rechedule to give the MMC device a chance to continue
423 * processing the previous command without being polled too
426 usleep_range(1000, 5000);
427 } while (++retry_count
< retries_max
);
429 if (retry_count
== retries_max
)
435 static int ioctl_do_sanitize(struct mmc_card
*card
)
439 if (!mmc_can_sanitize(card
)) {
440 pr_warn("%s: %s - SANITIZE is not supported\n",
441 mmc_hostname(card
->host
), __func__
);
446 pr_debug("%s: %s - SANITIZE IN PROGRESS...\n",
447 mmc_hostname(card
->host
), __func__
);
449 err
= mmc_switch(card
, EXT_CSD_CMD_SET_NORMAL
,
450 EXT_CSD_SANITIZE_START
, 1,
451 MMC_SANITIZE_REQ_TIMEOUT
);
454 pr_err("%s: %s - EXT_CSD_SANITIZE_START failed. err=%d\n",
455 mmc_hostname(card
->host
), __func__
, err
);
457 pr_debug("%s: %s - SANITIZE COMPLETED\n", mmc_hostname(card
->host
),
463 static int __mmc_blk_ioctl_cmd(struct mmc_card
*card
, struct mmc_blk_data
*md
,
464 struct mmc_blk_ioc_data
*idata
)
466 struct mmc_command cmd
= {0};
467 struct mmc_data data
= {0};
468 struct mmc_request mrq
= {NULL
};
469 struct scatterlist sg
;
474 if (!card
|| !md
|| !idata
)
477 if (md
->area_type
& MMC_BLK_DATA_AREA_RPMB
)
480 cmd
.opcode
= idata
->ic
.opcode
;
481 cmd
.arg
= idata
->ic
.arg
;
482 cmd
.flags
= idata
->ic
.flags
;
484 if (idata
->buf_bytes
) {
487 data
.blksz
= idata
->ic
.blksz
;
488 data
.blocks
= idata
->ic
.blocks
;
490 sg_init_one(data
.sg
, idata
->buf
, idata
->buf_bytes
);
492 if (idata
->ic
.write_flag
)
493 data
.flags
= MMC_DATA_WRITE
;
495 data
.flags
= MMC_DATA_READ
;
497 /* data.flags must already be set before doing this. */
498 mmc_set_data_timeout(&data
, card
);
500 /* Allow overriding the timeout_ns for empirical tuning. */
501 if (idata
->ic
.data_timeout_ns
)
502 data
.timeout_ns
= idata
->ic
.data_timeout_ns
;
504 if ((cmd
.flags
& MMC_RSP_R1B
) == MMC_RSP_R1B
) {
506 * Pretend this is a data transfer and rely on the
507 * host driver to compute timeout. When all host
508 * drivers support cmd.cmd_timeout for R1B, this
512 * cmd.cmd_timeout = idata->ic.cmd_timeout_ms;
514 data
.timeout_ns
= idata
->ic
.cmd_timeout_ms
* 1000000;
522 err
= mmc_blk_part_switch(card
, md
);
526 if (idata
->ic
.is_acmd
) {
527 err
= mmc_app_cmd(card
->host
, card
);
533 err
= mmc_set_blockcount(card
, data
.blocks
,
534 idata
->ic
.write_flag
& (1 << 31));
539 if ((MMC_EXTRACT_INDEX_FROM_ARG(cmd
.arg
) == EXT_CSD_SANITIZE_START
) &&
540 (cmd
.opcode
== MMC_SWITCH
)) {
541 err
= ioctl_do_sanitize(card
);
544 pr_err("%s: ioctl_do_sanitize() failed. err = %d",
550 mmc_wait_for_req(card
->host
, &mrq
);
553 dev_err(mmc_dev(card
->host
), "%s: cmd error %d\n",
554 __func__
, cmd
.error
);
558 dev_err(mmc_dev(card
->host
), "%s: data error %d\n",
559 __func__
, data
.error
);
564 * According to the SD specs, some commands require a delay after
565 * issuing the command.
567 if (idata
->ic
.postsleep_min_us
)
568 usleep_range(idata
->ic
.postsleep_min_us
, idata
->ic
.postsleep_max_us
);
570 memcpy(&(idata
->ic
.response
), cmd
.resp
, sizeof(cmd
.resp
));
574 * Ensure RPMB command has completed by polling CMD13
577 err
= ioctl_rpmb_card_status_poll(card
, &status
, 5);
579 dev_err(mmc_dev(card
->host
),
580 "%s: Card Status=0x%08X, error %d\n",
581 __func__
, status
, err
);
587 static int mmc_blk_ioctl_cmd(struct block_device
*bdev
,
588 struct mmc_ioc_cmd __user
*ic_ptr
)
590 struct mmc_blk_ioc_data
*idata
;
591 struct mmc_blk_data
*md
;
592 struct mmc_card
*card
;
593 int err
= 0, ioc_err
= 0;
596 * The caller must have CAP_SYS_RAWIO, and must be calling this on the
597 * whole block device, not on a partition. This prevents overspray
598 * between sibling partitions.
600 if ((!capable(CAP_SYS_RAWIO
)) || (bdev
!= bdev
->bd_contains
))
603 idata
= mmc_blk_ioctl_copy_from_user(ic_ptr
);
605 return PTR_ERR(idata
);
607 md
= mmc_blk_get(bdev
->bd_disk
);
613 card
= md
->queue
.card
;
621 ioc_err
= __mmc_blk_ioctl_cmd(card
, md
, idata
);
623 /* Always switch back to main area after RPMB access */
624 if (md
->area_type
& MMC_BLK_DATA_AREA_RPMB
)
625 mmc_blk_part_switch(card
, dev_get_drvdata(&card
->dev
));
629 err
= mmc_blk_ioctl_copy_to_user(ic_ptr
, idata
);
636 return ioc_err
? ioc_err
: err
;
639 static int mmc_blk_ioctl_multi_cmd(struct block_device
*bdev
,
640 struct mmc_ioc_multi_cmd __user
*user
)
642 struct mmc_blk_ioc_data
**idata
= NULL
;
643 struct mmc_ioc_cmd __user
*cmds
= user
->cmds
;
644 struct mmc_card
*card
;
645 struct mmc_blk_data
*md
;
646 int i
, err
= 0, ioc_err
= 0;
650 * The caller must have CAP_SYS_RAWIO, and must be calling this on the
651 * whole block device, not on a partition. This prevents overspray
652 * between sibling partitions.
654 if ((!capable(CAP_SYS_RAWIO
)) || (bdev
!= bdev
->bd_contains
))
657 if (copy_from_user(&num_of_cmds
, &user
->num_of_cmds
,
658 sizeof(num_of_cmds
)))
661 if (num_of_cmds
> MMC_IOC_MAX_CMDS
)
664 idata
= kcalloc(num_of_cmds
, sizeof(*idata
), GFP_KERNEL
);
668 for (i
= 0; i
< num_of_cmds
; i
++) {
669 idata
[i
] = mmc_blk_ioctl_copy_from_user(&cmds
[i
]);
670 if (IS_ERR(idata
[i
])) {
671 err
= PTR_ERR(idata
[i
]);
677 md
= mmc_blk_get(bdev
->bd_disk
);
683 card
= md
->queue
.card
;
691 for (i
= 0; i
< num_of_cmds
&& !ioc_err
; i
++)
692 ioc_err
= __mmc_blk_ioctl_cmd(card
, md
, idata
[i
]);
694 /* Always switch back to main area after RPMB access */
695 if (md
->area_type
& MMC_BLK_DATA_AREA_RPMB
)
696 mmc_blk_part_switch(card
, dev_get_drvdata(&card
->dev
));
700 /* copy to user if data and response */
701 for (i
= 0; i
< num_of_cmds
&& !err
; i
++)
702 err
= mmc_blk_ioctl_copy_to_user(&cmds
[i
], idata
[i
]);
707 for (i
= 0; i
< num_of_cmds
; i
++) {
708 kfree(idata
[i
]->buf
);
712 return ioc_err
? ioc_err
: err
;
715 static int mmc_blk_ioctl(struct block_device
*bdev
, fmode_t mode
,
716 unsigned int cmd
, unsigned long arg
)
720 return mmc_blk_ioctl_cmd(bdev
,
721 (struct mmc_ioc_cmd __user
*)arg
);
722 case MMC_IOC_MULTI_CMD
:
723 return mmc_blk_ioctl_multi_cmd(bdev
,
724 (struct mmc_ioc_multi_cmd __user
*)arg
);
731 static int mmc_blk_compat_ioctl(struct block_device
*bdev
, fmode_t mode
,
732 unsigned int cmd
, unsigned long arg
)
734 return mmc_blk_ioctl(bdev
, mode
, cmd
, (unsigned long) compat_ptr(arg
));
738 static const struct block_device_operations mmc_bdops
= {
739 .open
= mmc_blk_open
,
740 .release
= mmc_blk_release
,
741 .getgeo
= mmc_blk_getgeo
,
742 .owner
= THIS_MODULE
,
743 .ioctl
= mmc_blk_ioctl
,
745 .compat_ioctl
= mmc_blk_compat_ioctl
,
749 static inline int mmc_blk_part_switch(struct mmc_card
*card
,
750 struct mmc_blk_data
*md
)
753 struct mmc_blk_data
*main_md
= dev_get_drvdata(&card
->dev
);
755 if (main_md
->part_curr
== md
->part_type
)
758 if (mmc_card_mmc(card
)) {
759 u8 part_config
= card
->ext_csd
.part_config
;
761 if (md
->part_type
== EXT_CSD_PART_CONFIG_ACC_RPMB
)
762 mmc_retune_pause(card
->host
);
764 part_config
&= ~EXT_CSD_PART_CONFIG_ACC_MASK
;
765 part_config
|= md
->part_type
;
767 ret
= mmc_switch(card
, EXT_CSD_CMD_SET_NORMAL
,
768 EXT_CSD_PART_CONFIG
, part_config
,
769 card
->ext_csd
.part_time
);
771 if (md
->part_type
== EXT_CSD_PART_CONFIG_ACC_RPMB
)
772 mmc_retune_unpause(card
->host
);
776 card
->ext_csd
.part_config
= part_config
;
778 if (main_md
->part_curr
== EXT_CSD_PART_CONFIG_ACC_RPMB
)
779 mmc_retune_unpause(card
->host
);
782 main_md
->part_curr
= md
->part_type
;
786 static u32
mmc_sd_num_wr_blocks(struct mmc_card
*card
)
792 struct mmc_request mrq
= {NULL
};
793 struct mmc_command cmd
= {0};
794 struct mmc_data data
= {0};
796 struct scatterlist sg
;
798 cmd
.opcode
= MMC_APP_CMD
;
799 cmd
.arg
= card
->rca
<< 16;
800 cmd
.flags
= MMC_RSP_SPI_R1
| MMC_RSP_R1
| MMC_CMD_AC
;
802 err
= mmc_wait_for_cmd(card
->host
, &cmd
, 0);
805 if (!mmc_host_is_spi(card
->host
) && !(cmd
.resp
[0] & R1_APP_CMD
))
808 memset(&cmd
, 0, sizeof(struct mmc_command
));
810 cmd
.opcode
= SD_APP_SEND_NUM_WR_BLKS
;
812 cmd
.flags
= MMC_RSP_SPI_R1
| MMC_RSP_R1
| MMC_CMD_ADTC
;
816 data
.flags
= MMC_DATA_READ
;
819 mmc_set_data_timeout(&data
, card
);
824 blocks
= kmalloc(4, GFP_KERNEL
);
828 sg_init_one(&sg
, blocks
, 4);
830 mmc_wait_for_req(card
->host
, &mrq
);
832 result
= ntohl(*blocks
);
835 if (cmd
.error
|| data
.error
)
841 static int get_card_status(struct mmc_card
*card
, u32
*status
, int retries
)
843 struct mmc_command cmd
= {0};
846 cmd
.opcode
= MMC_SEND_STATUS
;
847 if (!mmc_host_is_spi(card
->host
))
848 cmd
.arg
= card
->rca
<< 16;
849 cmd
.flags
= MMC_RSP_SPI_R2
| MMC_RSP_R1
| MMC_CMD_AC
;
850 err
= mmc_wait_for_cmd(card
->host
, &cmd
, retries
);
852 *status
= cmd
.resp
[0];
856 static int card_busy_detect(struct mmc_card
*card
, unsigned int timeout_ms
,
857 bool hw_busy_detect
, struct request
*req
, int *gen_err
)
859 unsigned long timeout
= jiffies
+ msecs_to_jiffies(timeout_ms
);
864 err
= get_card_status(card
, &status
, 5);
866 pr_err("%s: error %d requesting status\n",
867 req
->rq_disk
->disk_name
, err
);
871 if (status
& R1_ERROR
) {
872 pr_err("%s: %s: error sending status cmd, status %#x\n",
873 req
->rq_disk
->disk_name
, __func__
, status
);
877 /* We may rely on the host hw to handle busy detection.*/
878 if ((card
->host
->caps
& MMC_CAP_WAIT_WHILE_BUSY
) &&
883 * Timeout if the device never becomes ready for data and never
884 * leaves the program state.
886 if (time_after(jiffies
, timeout
)) {
887 pr_err("%s: Card stuck in programming state! %s %s\n",
888 mmc_hostname(card
->host
),
889 req
->rq_disk
->disk_name
, __func__
);
894 * Some cards mishandle the status bits,
895 * so make sure to check both the busy
896 * indication and the card state.
898 } while (!(status
& R1_READY_FOR_DATA
) ||
899 (R1_CURRENT_STATE(status
) == R1_STATE_PRG
));
904 static int send_stop(struct mmc_card
*card
, unsigned int timeout_ms
,
905 struct request
*req
, int *gen_err
, u32
*stop_status
)
907 struct mmc_host
*host
= card
->host
;
908 struct mmc_command cmd
= {0};
910 bool use_r1b_resp
= rq_data_dir(req
) == WRITE
;
913 * Normally we use R1B responses for WRITE, but in cases where the host
914 * has specified a max_busy_timeout we need to validate it. A failure
915 * means we need to prevent the host from doing hw busy detection, which
916 * is done by converting to a R1 response instead.
918 if (host
->max_busy_timeout
&& (timeout_ms
> host
->max_busy_timeout
))
919 use_r1b_resp
= false;
921 cmd
.opcode
= MMC_STOP_TRANSMISSION
;
923 cmd
.flags
= MMC_RSP_SPI_R1B
| MMC_RSP_R1B
| MMC_CMD_AC
;
924 cmd
.busy_timeout
= timeout_ms
;
926 cmd
.flags
= MMC_RSP_SPI_R1
| MMC_RSP_R1
| MMC_CMD_AC
;
929 err
= mmc_wait_for_cmd(host
, &cmd
, 5);
933 *stop_status
= cmd
.resp
[0];
935 /* No need to check card status in case of READ. */
936 if (rq_data_dir(req
) == READ
)
939 if (!mmc_host_is_spi(host
) &&
940 (*stop_status
& R1_ERROR
)) {
941 pr_err("%s: %s: general error sending stop command, resp %#x\n",
942 req
->rq_disk
->disk_name
, __func__
, *stop_status
);
946 return card_busy_detect(card
, timeout_ms
, use_r1b_resp
, req
, gen_err
);
949 #define ERR_NOMEDIUM 3
952 #define ERR_CONTINUE 0
954 static int mmc_blk_cmd_error(struct request
*req
, const char *name
, int error
,
955 bool status_valid
, u32 status
)
959 /* response crc error, retry the r/w cmd */
960 pr_err("%s: %s sending %s command, card status %#x\n",
961 req
->rq_disk
->disk_name
, "response CRC error",
966 pr_err("%s: %s sending %s command, card status %#x\n",
967 req
->rq_disk
->disk_name
, "timed out", name
, status
);
969 /* If the status cmd initially failed, retry the r/w cmd */
971 pr_err("%s: status not valid, retrying timeout\n",
972 req
->rq_disk
->disk_name
);
977 * If it was a r/w cmd crc error, or illegal command
978 * (eg, issued in wrong state) then retry - we should
979 * have corrected the state problem above.
981 if (status
& (R1_COM_CRC_ERROR
| R1_ILLEGAL_COMMAND
)) {
982 pr_err("%s: command error, retrying timeout\n",
983 req
->rq_disk
->disk_name
);
987 /* Otherwise abort the command */
991 /* We don't understand the error code the driver gave us */
992 pr_err("%s: unknown error %d sending read/write command, card status %#x\n",
993 req
->rq_disk
->disk_name
, error
, status
);
999 * Initial r/w and stop cmd error recovery.
1000 * We don't know whether the card received the r/w cmd or not, so try to
1001 * restore things back to a sane state. Essentially, we do this as follows:
1002 * - Obtain card status. If the first attempt to obtain card status fails,
1003 * the status word will reflect the failed status cmd, not the failed
1004 * r/w cmd. If we fail to obtain card status, it suggests we can no
1005 * longer communicate with the card.
1006 * - Check the card state. If the card received the cmd but there was a
1007 * transient problem with the response, it might still be in a data transfer
1008 * mode. Try to send it a stop command. If this fails, we can't recover.
1009 * - If the r/w cmd failed due to a response CRC error, it was probably
1010 * transient, so retry the cmd.
1011 * - If the r/w cmd timed out, but we didn't get the r/w cmd status, retry.
1012 * - If the r/w cmd timed out, and the r/w cmd failed due to CRC error or
1013 * illegal cmd, retry.
1014 * Otherwise we don't understand what happened, so abort.
1016 static int mmc_blk_cmd_recovery(struct mmc_card
*card
, struct request
*req
,
1017 struct mmc_blk_request
*brq
, int *ecc_err
, int *gen_err
)
1019 bool prev_cmd_status_valid
= true;
1020 u32 status
, stop_status
= 0;
1023 if (mmc_card_removed(card
))
1024 return ERR_NOMEDIUM
;
1027 * Try to get card status which indicates both the card state
1028 * and why there was no response. If the first attempt fails,
1029 * we can't be sure the returned status is for the r/w command.
1031 for (retry
= 2; retry
>= 0; retry
--) {
1032 err
= get_card_status(card
, &status
, 0);
1036 /* Re-tune if needed */
1037 mmc_retune_recheck(card
->host
);
1039 prev_cmd_status_valid
= false;
1040 pr_err("%s: error %d sending status command, %sing\n",
1041 req
->rq_disk
->disk_name
, err
, retry
? "retry" : "abort");
1044 /* We couldn't get a response from the card. Give up. */
1046 /* Check if the card is removed */
1047 if (mmc_detect_card_removed(card
->host
))
1048 return ERR_NOMEDIUM
;
1052 /* Flag ECC errors */
1053 if ((status
& R1_CARD_ECC_FAILED
) ||
1054 (brq
->stop
.resp
[0] & R1_CARD_ECC_FAILED
) ||
1055 (brq
->cmd
.resp
[0] & R1_CARD_ECC_FAILED
))
1058 /* Flag General errors */
1059 if (!mmc_host_is_spi(card
->host
) && rq_data_dir(req
) != READ
)
1060 if ((status
& R1_ERROR
) ||
1061 (brq
->stop
.resp
[0] & R1_ERROR
)) {
1062 pr_err("%s: %s: general error sending stop or status command, stop cmd response %#x, card status %#x\n",
1063 req
->rq_disk
->disk_name
, __func__
,
1064 brq
->stop
.resp
[0], status
);
1069 * Check the current card state. If it is in some data transfer
1070 * mode, tell it to stop (and hopefully transition back to TRAN.)
1072 if (R1_CURRENT_STATE(status
) == R1_STATE_DATA
||
1073 R1_CURRENT_STATE(status
) == R1_STATE_RCV
) {
1074 err
= send_stop(card
,
1075 DIV_ROUND_UP(brq
->data
.timeout_ns
, 1000000),
1076 req
, gen_err
, &stop_status
);
1078 pr_err("%s: error %d sending stop command\n",
1079 req
->rq_disk
->disk_name
, err
);
1081 * If the stop cmd also timed out, the card is probably
1082 * not present, so abort. Other errors are bad news too.
1087 if (stop_status
& R1_CARD_ECC_FAILED
)
1091 /* Check for set block count errors */
1093 return mmc_blk_cmd_error(req
, "SET_BLOCK_COUNT", brq
->sbc
.error
,
1094 prev_cmd_status_valid
, status
);
1096 /* Check for r/w command errors */
1098 return mmc_blk_cmd_error(req
, "r/w cmd", brq
->cmd
.error
,
1099 prev_cmd_status_valid
, status
);
1102 if (!brq
->stop
.error
)
1103 return ERR_CONTINUE
;
1105 /* Now for stop errors. These aren't fatal to the transfer. */
1106 pr_info("%s: error %d sending stop command, original cmd response %#x, card status %#x\n",
1107 req
->rq_disk
->disk_name
, brq
->stop
.error
,
1108 brq
->cmd
.resp
[0], status
);
1111 * Subsitute in our own stop status as this will give the error
1112 * state which happened during the execution of the r/w command.
1115 brq
->stop
.resp
[0] = stop_status
;
1116 brq
->stop
.error
= 0;
1118 return ERR_CONTINUE
;
1121 static int mmc_blk_reset(struct mmc_blk_data
*md
, struct mmc_host
*host
,
1126 if (md
->reset_done
& type
)
1129 md
->reset_done
|= type
;
1130 err
= mmc_hw_reset(host
);
1131 /* Ensure we switch back to the correct partition */
1132 if (err
!= -EOPNOTSUPP
) {
1133 struct mmc_blk_data
*main_md
=
1134 dev_get_drvdata(&host
->card
->dev
);
1137 main_md
->part_curr
= main_md
->part_type
;
1138 part_err
= mmc_blk_part_switch(host
->card
, md
);
1141 * We have failed to get back into the correct
1142 * partition, so we need to abort the whole request.
1150 static inline void mmc_blk_reset_success(struct mmc_blk_data
*md
, int type
)
1152 md
->reset_done
&= ~type
;
1155 int mmc_access_rpmb(struct mmc_queue
*mq
)
1157 struct mmc_blk_data
*md
= mq
->data
;
1159 * If this is a RPMB partition access, return ture
1161 if (md
&& md
->part_type
== EXT_CSD_PART_CONFIG_ACC_RPMB
)
1167 static int mmc_blk_issue_discard_rq(struct mmc_queue
*mq
, struct request
*req
)
1169 struct mmc_blk_data
*md
= mq
->data
;
1170 struct mmc_card
*card
= md
->queue
.card
;
1171 unsigned int from
, nr
, arg
;
1172 int err
= 0, type
= MMC_BLK_DISCARD
;
1174 if (!mmc_can_erase(card
)) {
1179 from
= blk_rq_pos(req
);
1180 nr
= blk_rq_sectors(req
);
1182 if (mmc_can_discard(card
))
1183 arg
= MMC_DISCARD_ARG
;
1184 else if (mmc_can_trim(card
))
1187 arg
= MMC_ERASE_ARG
;
1189 if (card
->quirks
& MMC_QUIRK_INAND_CMD38
) {
1190 err
= mmc_switch(card
, EXT_CSD_CMD_SET_NORMAL
,
1191 INAND_CMD38_ARG_EXT_CSD
,
1192 arg
== MMC_TRIM_ARG
?
1193 INAND_CMD38_ARG_TRIM
:
1194 INAND_CMD38_ARG_ERASE
,
1199 err
= mmc_erase(card
, from
, nr
, arg
);
1201 if (err
== -EIO
&& !mmc_blk_reset(md
, card
->host
, type
))
1204 mmc_blk_reset_success(md
, type
);
1205 blk_end_request(req
, err
, blk_rq_bytes(req
));
1210 static int mmc_blk_issue_secdiscard_rq(struct mmc_queue
*mq
,
1211 struct request
*req
)
1213 struct mmc_blk_data
*md
= mq
->data
;
1214 struct mmc_card
*card
= md
->queue
.card
;
1215 unsigned int from
, nr
, arg
;
1216 int err
= 0, type
= MMC_BLK_SECDISCARD
;
1218 if (!(mmc_can_secure_erase_trim(card
))) {
1223 from
= blk_rq_pos(req
);
1224 nr
= blk_rq_sectors(req
);
1226 if (mmc_can_trim(card
) && !mmc_erase_group_aligned(card
, from
, nr
))
1227 arg
= MMC_SECURE_TRIM1_ARG
;
1229 arg
= MMC_SECURE_ERASE_ARG
;
1232 if (card
->quirks
& MMC_QUIRK_INAND_CMD38
) {
1233 err
= mmc_switch(card
, EXT_CSD_CMD_SET_NORMAL
,
1234 INAND_CMD38_ARG_EXT_CSD
,
1235 arg
== MMC_SECURE_TRIM1_ARG
?
1236 INAND_CMD38_ARG_SECTRIM1
:
1237 INAND_CMD38_ARG_SECERASE
,
1243 err
= mmc_erase(card
, from
, nr
, arg
);
1249 if (arg
== MMC_SECURE_TRIM1_ARG
) {
1250 if (card
->quirks
& MMC_QUIRK_INAND_CMD38
) {
1251 err
= mmc_switch(card
, EXT_CSD_CMD_SET_NORMAL
,
1252 INAND_CMD38_ARG_EXT_CSD
,
1253 INAND_CMD38_ARG_SECTRIM2
,
1259 err
= mmc_erase(card
, from
, nr
, MMC_SECURE_TRIM2_ARG
);
1267 if (err
&& !mmc_blk_reset(md
, card
->host
, type
))
1270 mmc_blk_reset_success(md
, type
);
1272 blk_end_request(req
, err
, blk_rq_bytes(req
));
1277 static int mmc_blk_issue_flush(struct mmc_queue
*mq
, struct request
*req
)
1279 struct mmc_blk_data
*md
= mq
->data
;
1280 struct mmc_card
*card
= md
->queue
.card
;
1283 ret
= mmc_flush_cache(card
);
1287 blk_end_request_all(req
, ret
);
1293 * Reformat current write as a reliable write, supporting
1294 * both legacy and the enhanced reliable write MMC cards.
1295 * In each transfer we'll handle only as much as a single
1296 * reliable write can handle, thus finish the request in
1297 * partial completions.
1299 static inline void mmc_apply_rel_rw(struct mmc_blk_request
*brq
,
1300 struct mmc_card
*card
,
1301 struct request
*req
)
1303 if (!(card
->ext_csd
.rel_param
& EXT_CSD_WR_REL_PARAM_EN
)) {
1304 /* Legacy mode imposes restrictions on transfers. */
1305 if (!IS_ALIGNED(brq
->cmd
.arg
, card
->ext_csd
.rel_sectors
))
1306 brq
->data
.blocks
= 1;
1308 if (brq
->data
.blocks
> card
->ext_csd
.rel_sectors
)
1309 brq
->data
.blocks
= card
->ext_csd
.rel_sectors
;
1310 else if (brq
->data
.blocks
< card
->ext_csd
.rel_sectors
)
1311 brq
->data
.blocks
= 1;
1315 #define CMD_ERRORS \
1316 (R1_OUT_OF_RANGE | /* Command argument out of range */ \
1317 R1_ADDRESS_ERROR | /* Misaligned address */ \
1318 R1_BLOCK_LEN_ERROR | /* Transferred block length incorrect */\
1319 R1_WP_VIOLATION | /* Tried to write to protected block */ \
1320 R1_CC_ERROR | /* Card controller error */ \
1321 R1_ERROR) /* General/unknown error */
1323 static int mmc_blk_err_check(struct mmc_card
*card
,
1324 struct mmc_async_req
*areq
)
1326 struct mmc_queue_req
*mq_mrq
= container_of(areq
, struct mmc_queue_req
,
1328 struct mmc_blk_request
*brq
= &mq_mrq
->brq
;
1329 struct request
*req
= mq_mrq
->req
;
1330 int need_retune
= card
->host
->need_retune
;
1331 int ecc_err
= 0, gen_err
= 0;
1334 * sbc.error indicates a problem with the set block count
1335 * command. No data will have been transferred.
1337 * cmd.error indicates a problem with the r/w command. No
1338 * data will have been transferred.
1340 * stop.error indicates a problem with the stop command. Data
1341 * may have been transferred, or may still be transferring.
1343 if (brq
->sbc
.error
|| brq
->cmd
.error
|| brq
->stop
.error
||
1345 switch (mmc_blk_cmd_recovery(card
, req
, brq
, &ecc_err
, &gen_err
)) {
1347 return MMC_BLK_RETRY
;
1349 return MMC_BLK_ABORT
;
1351 return MMC_BLK_NOMEDIUM
;
1358 * Check for errors relating to the execution of the
1359 * initial command - such as address errors. No data
1360 * has been transferred.
1362 if (brq
->cmd
.resp
[0] & CMD_ERRORS
) {
1363 pr_err("%s: r/w command failed, status = %#x\n",
1364 req
->rq_disk
->disk_name
, brq
->cmd
.resp
[0]);
1365 return MMC_BLK_ABORT
;
1369 * Everything else is either success, or a data error of some
1370 * kind. If it was a write, we may have transitioned to
1371 * program mode, which we have to wait for it to complete.
1373 if (!mmc_host_is_spi(card
->host
) && rq_data_dir(req
) != READ
) {
1376 /* Check stop command response */
1377 if (brq
->stop
.resp
[0] & R1_ERROR
) {
1378 pr_err("%s: %s: general error sending stop command, stop cmd response %#x\n",
1379 req
->rq_disk
->disk_name
, __func__
,
1384 err
= card_busy_detect(card
, MMC_BLK_TIMEOUT_MS
, false, req
,
1387 return MMC_BLK_CMD_ERR
;
1390 /* if general error occurs, retry the write operation. */
1392 pr_warn("%s: retrying write for general error\n",
1393 req
->rq_disk
->disk_name
);
1394 return MMC_BLK_RETRY
;
1397 if (brq
->data
.error
) {
1398 if (need_retune
&& !brq
->retune_retry_done
) {
1399 pr_debug("%s: retrying because a re-tune was needed\n",
1400 req
->rq_disk
->disk_name
);
1401 brq
->retune_retry_done
= 1;
1402 return MMC_BLK_RETRY
;
1404 pr_err("%s: error %d transferring data, sector %u, nr %u, cmd response %#x, card status %#x\n",
1405 req
->rq_disk
->disk_name
, brq
->data
.error
,
1406 (unsigned)blk_rq_pos(req
),
1407 (unsigned)blk_rq_sectors(req
),
1408 brq
->cmd
.resp
[0], brq
->stop
.resp
[0]);
1410 if (rq_data_dir(req
) == READ
) {
1412 return MMC_BLK_ECC_ERR
;
1413 return MMC_BLK_DATA_ERR
;
1415 return MMC_BLK_CMD_ERR
;
1419 if (!brq
->data
.bytes_xfered
)
1420 return MMC_BLK_RETRY
;
1422 if (mmc_packed_cmd(mq_mrq
->cmd_type
)) {
1423 if (unlikely(brq
->data
.blocks
<< 9 != brq
->data
.bytes_xfered
))
1424 return MMC_BLK_PARTIAL
;
1426 return MMC_BLK_SUCCESS
;
1429 if (blk_rq_bytes(req
) != brq
->data
.bytes_xfered
)
1430 return MMC_BLK_PARTIAL
;
1432 return MMC_BLK_SUCCESS
;
1435 static int mmc_blk_packed_err_check(struct mmc_card
*card
,
1436 struct mmc_async_req
*areq
)
1438 struct mmc_queue_req
*mq_rq
= container_of(areq
, struct mmc_queue_req
,
1440 struct request
*req
= mq_rq
->req
;
1441 struct mmc_packed
*packed
= mq_rq
->packed
;
1442 int err
, check
, status
;
1448 check
= mmc_blk_err_check(card
, areq
);
1449 err
= get_card_status(card
, &status
, 0);
1451 pr_err("%s: error %d sending status command\n",
1452 req
->rq_disk
->disk_name
, err
);
1453 return MMC_BLK_ABORT
;
1456 if (status
& R1_EXCEPTION_EVENT
) {
1457 err
= mmc_get_ext_csd(card
, &ext_csd
);
1459 pr_err("%s: error %d sending ext_csd\n",
1460 req
->rq_disk
->disk_name
, err
);
1461 return MMC_BLK_ABORT
;
1464 if ((ext_csd
[EXT_CSD_EXP_EVENTS_STATUS
] &
1465 EXT_CSD_PACKED_FAILURE
) &&
1466 (ext_csd
[EXT_CSD_PACKED_CMD_STATUS
] &
1467 EXT_CSD_PACKED_GENERIC_ERROR
)) {
1468 if (ext_csd
[EXT_CSD_PACKED_CMD_STATUS
] &
1469 EXT_CSD_PACKED_INDEXED_ERROR
) {
1470 packed
->idx_failure
=
1471 ext_csd
[EXT_CSD_PACKED_FAILURE_INDEX
] - 1;
1472 check
= MMC_BLK_PARTIAL
;
1474 pr_err("%s: packed cmd failed, nr %u, sectors %u, "
1475 "failure index: %d\n",
1476 req
->rq_disk
->disk_name
, packed
->nr_entries
,
1477 packed
->blocks
, packed
->idx_failure
);
1485 static void mmc_blk_rw_rq_prep(struct mmc_queue_req
*mqrq
,
1486 struct mmc_card
*card
,
1488 struct mmc_queue
*mq
)
1490 u32 readcmd
, writecmd
;
1491 struct mmc_blk_request
*brq
= &mqrq
->brq
;
1492 struct request
*req
= mqrq
->req
;
1493 struct mmc_blk_data
*md
= mq
->data
;
1497 * Reliable writes are used to implement Forced Unit Access and
1498 * are supported only on MMCs.
1500 bool do_rel_wr
= (req
->cmd_flags
& REQ_FUA
) &&
1501 (rq_data_dir(req
) == WRITE
) &&
1502 (md
->flags
& MMC_BLK_REL_WR
);
1504 memset(brq
, 0, sizeof(struct mmc_blk_request
));
1505 brq
->mrq
.cmd
= &brq
->cmd
;
1506 brq
->mrq
.data
= &brq
->data
;
1508 brq
->cmd
.arg
= blk_rq_pos(req
);
1509 if (!mmc_card_blockaddr(card
))
1511 brq
->cmd
.flags
= MMC_RSP_SPI_R1
| MMC_RSP_R1
| MMC_CMD_ADTC
;
1512 brq
->data
.blksz
= 512;
1513 brq
->stop
.opcode
= MMC_STOP_TRANSMISSION
;
1515 brq
->data
.blocks
= blk_rq_sectors(req
);
1518 * The block layer doesn't support all sector count
1519 * restrictions, so we need to be prepared for too big
1522 if (brq
->data
.blocks
> card
->host
->max_blk_count
)
1523 brq
->data
.blocks
= card
->host
->max_blk_count
;
1525 if (brq
->data
.blocks
> 1) {
1527 * After a read error, we redo the request one sector
1528 * at a time in order to accurately determine which
1529 * sectors can be read successfully.
1532 brq
->data
.blocks
= 1;
1535 * Some controllers have HW issues while operating
1536 * in multiple I/O mode
1538 if (card
->host
->ops
->multi_io_quirk
)
1539 brq
->data
.blocks
= card
->host
->ops
->multi_io_quirk(card
,
1540 (rq_data_dir(req
) == READ
) ?
1541 MMC_DATA_READ
: MMC_DATA_WRITE
,
1545 if (brq
->data
.blocks
> 1 || do_rel_wr
) {
1546 /* SPI multiblock writes terminate using a special
1547 * token, not a STOP_TRANSMISSION request.
1549 if (!mmc_host_is_spi(card
->host
) ||
1550 rq_data_dir(req
) == READ
)
1551 brq
->mrq
.stop
= &brq
->stop
;
1552 readcmd
= MMC_READ_MULTIPLE_BLOCK
;
1553 writecmd
= MMC_WRITE_MULTIPLE_BLOCK
;
1555 brq
->mrq
.stop
= NULL
;
1556 readcmd
= MMC_READ_SINGLE_BLOCK
;
1557 writecmd
= MMC_WRITE_BLOCK
;
1559 if (rq_data_dir(req
) == READ
) {
1560 brq
->cmd
.opcode
= readcmd
;
1561 brq
->data
.flags
= MMC_DATA_READ
;
1563 brq
->stop
.flags
= MMC_RSP_SPI_R1
| MMC_RSP_R1
|
1566 brq
->cmd
.opcode
= writecmd
;
1567 brq
->data
.flags
= MMC_DATA_WRITE
;
1569 brq
->stop
.flags
= MMC_RSP_SPI_R1B
| MMC_RSP_R1B
|
1574 mmc_apply_rel_rw(brq
, card
, req
);
1577 * Data tag is used only during writing meta data to speed
1578 * up write and any subsequent read of this meta data
1580 do_data_tag
= (card
->ext_csd
.data_tag_unit_size
) &&
1581 (req
->cmd_flags
& REQ_META
) &&
1582 (rq_data_dir(req
) == WRITE
) &&
1583 ((brq
->data
.blocks
* brq
->data
.blksz
) >=
1584 card
->ext_csd
.data_tag_unit_size
);
1587 * Pre-defined multi-block transfers are preferable to
1588 * open ended-ones (and necessary for reliable writes).
1589 * However, it is not sufficient to just send CMD23,
1590 * and avoid the final CMD12, as on an error condition
1591 * CMD12 (stop) needs to be sent anyway. This, coupled
1592 * with Auto-CMD23 enhancements provided by some
1593 * hosts, means that the complexity of dealing
1594 * with this is best left to the host. If CMD23 is
1595 * supported by card and host, we'll fill sbc in and let
1596 * the host deal with handling it correctly. This means
1597 * that for hosts that don't expose MMC_CAP_CMD23, no
1598 * change of behavior will be observed.
1600 * N.B: Some MMC cards experience perf degradation.
1601 * We'll avoid using CMD23-bounded multiblock writes for
1602 * these, while retaining features like reliable writes.
1604 if ((md
->flags
& MMC_BLK_CMD23
) && mmc_op_multi(brq
->cmd
.opcode
) &&
1605 (do_rel_wr
|| !(card
->quirks
& MMC_QUIRK_BLK_NO_CMD23
) ||
1607 brq
->sbc
.opcode
= MMC_SET_BLOCK_COUNT
;
1608 brq
->sbc
.arg
= brq
->data
.blocks
|
1609 (do_rel_wr
? (1 << 31) : 0) |
1610 (do_data_tag
? (1 << 29) : 0);
1611 brq
->sbc
.flags
= MMC_RSP_R1
| MMC_CMD_AC
;
1612 brq
->mrq
.sbc
= &brq
->sbc
;
1615 mmc_set_data_timeout(&brq
->data
, card
);
1617 brq
->data
.sg
= mqrq
->sg
;
1618 brq
->data
.sg_len
= mmc_queue_map_sg(mq
, mqrq
);
1621 * Adjust the sg list so it is the same size as the
1624 if (brq
->data
.blocks
!= blk_rq_sectors(req
)) {
1625 int i
, data_size
= brq
->data
.blocks
<< 9;
1626 struct scatterlist
*sg
;
1628 for_each_sg(brq
->data
.sg
, sg
, brq
->data
.sg_len
, i
) {
1629 data_size
-= sg
->length
;
1630 if (data_size
<= 0) {
1631 sg
->length
+= data_size
;
1636 brq
->data
.sg_len
= i
;
1639 mqrq
->mmc_active
.mrq
= &brq
->mrq
;
1640 mqrq
->mmc_active
.err_check
= mmc_blk_err_check
;
1642 mmc_queue_bounce_pre(mqrq
);
1645 static inline u8
mmc_calc_packed_hdr_segs(struct request_queue
*q
,
1646 struct mmc_card
*card
)
1648 unsigned int hdr_sz
= mmc_large_sector(card
) ? 4096 : 512;
1649 unsigned int max_seg_sz
= queue_max_segment_size(q
);
1650 unsigned int len
, nr_segs
= 0;
1653 len
= min(hdr_sz
, max_seg_sz
);
1661 static u8
mmc_blk_prep_packed_list(struct mmc_queue
*mq
, struct request
*req
)
1663 struct request_queue
*q
= mq
->queue
;
1664 struct mmc_card
*card
= mq
->card
;
1665 struct request
*cur
= req
, *next
= NULL
;
1666 struct mmc_blk_data
*md
= mq
->data
;
1667 struct mmc_queue_req
*mqrq
= mq
->mqrq_cur
;
1668 bool en_rel_wr
= card
->ext_csd
.rel_param
& EXT_CSD_WR_REL_PARAM_EN
;
1669 unsigned int req_sectors
= 0, phys_segments
= 0;
1670 unsigned int max_blk_count
, max_phys_segs
;
1671 bool put_back
= true;
1672 u8 max_packed_rw
= 0;
1675 if (!(md
->flags
& MMC_BLK_PACKED_CMD
))
1678 if ((rq_data_dir(cur
) == WRITE
) &&
1679 mmc_host_packed_wr(card
->host
))
1680 max_packed_rw
= card
->ext_csd
.max_packed_writes
;
1682 if (max_packed_rw
== 0)
1685 if (mmc_req_rel_wr(cur
) &&
1686 (md
->flags
& MMC_BLK_REL_WR
) && !en_rel_wr
)
1689 if (mmc_large_sector(card
) &&
1690 !IS_ALIGNED(blk_rq_sectors(cur
), 8))
1693 mmc_blk_clear_packed(mqrq
);
1695 max_blk_count
= min(card
->host
->max_blk_count
,
1696 card
->host
->max_req_size
>> 9);
1697 if (unlikely(max_blk_count
> 0xffff))
1698 max_blk_count
= 0xffff;
1700 max_phys_segs
= queue_max_segments(q
);
1701 req_sectors
+= blk_rq_sectors(cur
);
1702 phys_segments
+= cur
->nr_phys_segments
;
1704 if (rq_data_dir(cur
) == WRITE
) {
1705 req_sectors
+= mmc_large_sector(card
) ? 8 : 1;
1706 phys_segments
+= mmc_calc_packed_hdr_segs(q
, card
);
1710 if (reqs
>= max_packed_rw
- 1) {
1715 spin_lock_irq(q
->queue_lock
);
1716 next
= blk_fetch_request(q
);
1717 spin_unlock_irq(q
->queue_lock
);
1723 if (mmc_large_sector(card
) &&
1724 !IS_ALIGNED(blk_rq_sectors(next
), 8))
1727 if (next
->cmd_flags
& REQ_DISCARD
||
1728 next
->cmd_flags
& REQ_FLUSH
)
1731 if (rq_data_dir(cur
) != rq_data_dir(next
))
1734 if (mmc_req_rel_wr(next
) &&
1735 (md
->flags
& MMC_BLK_REL_WR
) && !en_rel_wr
)
1738 req_sectors
+= blk_rq_sectors(next
);
1739 if (req_sectors
> max_blk_count
)
1742 phys_segments
+= next
->nr_phys_segments
;
1743 if (phys_segments
> max_phys_segs
)
1746 list_add_tail(&next
->queuelist
, &mqrq
->packed
->list
);
1752 spin_lock_irq(q
->queue_lock
);
1753 blk_requeue_request(q
, next
);
1754 spin_unlock_irq(q
->queue_lock
);
1758 list_add(&req
->queuelist
, &mqrq
->packed
->list
);
1759 mqrq
->packed
->nr_entries
= ++reqs
;
1760 mqrq
->packed
->retries
= reqs
;
1765 mqrq
->cmd_type
= MMC_PACKED_NONE
;
1769 static void mmc_blk_packed_hdr_wrq_prep(struct mmc_queue_req
*mqrq
,
1770 struct mmc_card
*card
,
1771 struct mmc_queue
*mq
)
1773 struct mmc_blk_request
*brq
= &mqrq
->brq
;
1774 struct request
*req
= mqrq
->req
;
1775 struct request
*prq
;
1776 struct mmc_blk_data
*md
= mq
->data
;
1777 struct mmc_packed
*packed
= mqrq
->packed
;
1778 bool do_rel_wr
, do_data_tag
;
1779 u32
*packed_cmd_hdr
;
1785 mqrq
->cmd_type
= MMC_PACKED_WRITE
;
1787 packed
->idx_failure
= MMC_PACKED_NR_IDX
;
1789 packed_cmd_hdr
= packed
->cmd_hdr
;
1790 memset(packed_cmd_hdr
, 0, sizeof(packed
->cmd_hdr
));
1791 packed_cmd_hdr
[0] = cpu_to_le32((packed
->nr_entries
<< 16) |
1792 (PACKED_CMD_WR
<< 8) | PACKED_CMD_VER
);
1793 hdr_blocks
= mmc_large_sector(card
) ? 8 : 1;
1796 * Argument for each entry of packed group
1798 list_for_each_entry(prq
, &packed
->list
, queuelist
) {
1799 do_rel_wr
= mmc_req_rel_wr(prq
) && (md
->flags
& MMC_BLK_REL_WR
);
1800 do_data_tag
= (card
->ext_csd
.data_tag_unit_size
) &&
1801 (prq
->cmd_flags
& REQ_META
) &&
1802 (rq_data_dir(prq
) == WRITE
) &&
1803 ((brq
->data
.blocks
* brq
->data
.blksz
) >=
1804 card
->ext_csd
.data_tag_unit_size
);
1805 /* Argument of CMD23 */
1806 packed_cmd_hdr
[(i
* 2)] = cpu_to_le32(
1807 (do_rel_wr
? MMC_CMD23_ARG_REL_WR
: 0) |
1808 (do_data_tag
? MMC_CMD23_ARG_TAG_REQ
: 0) |
1809 blk_rq_sectors(prq
));
1810 /* Argument of CMD18 or CMD25 */
1811 packed_cmd_hdr
[((i
* 2)) + 1] = cpu_to_le32(
1812 mmc_card_blockaddr(card
) ?
1813 blk_rq_pos(prq
) : blk_rq_pos(prq
) << 9);
1814 packed
->blocks
+= blk_rq_sectors(prq
);
1818 memset(brq
, 0, sizeof(struct mmc_blk_request
));
1819 brq
->mrq
.cmd
= &brq
->cmd
;
1820 brq
->mrq
.data
= &brq
->data
;
1821 brq
->mrq
.sbc
= &brq
->sbc
;
1822 brq
->mrq
.stop
= &brq
->stop
;
1824 brq
->sbc
.opcode
= MMC_SET_BLOCK_COUNT
;
1825 brq
->sbc
.arg
= MMC_CMD23_ARG_PACKED
| (packed
->blocks
+ hdr_blocks
);
1826 brq
->sbc
.flags
= MMC_RSP_R1
| MMC_CMD_AC
;
1828 brq
->cmd
.opcode
= MMC_WRITE_MULTIPLE_BLOCK
;
1829 brq
->cmd
.arg
= blk_rq_pos(req
);
1830 if (!mmc_card_blockaddr(card
))
1832 brq
->cmd
.flags
= MMC_RSP_SPI_R1
| MMC_RSP_R1
| MMC_CMD_ADTC
;
1834 brq
->data
.blksz
= 512;
1835 brq
->data
.blocks
= packed
->blocks
+ hdr_blocks
;
1836 brq
->data
.flags
= MMC_DATA_WRITE
;
1838 brq
->stop
.opcode
= MMC_STOP_TRANSMISSION
;
1840 brq
->stop
.flags
= MMC_RSP_SPI_R1B
| MMC_RSP_R1B
| MMC_CMD_AC
;
1842 mmc_set_data_timeout(&brq
->data
, card
);
1844 brq
->data
.sg
= mqrq
->sg
;
1845 brq
->data
.sg_len
= mmc_queue_map_sg(mq
, mqrq
);
1847 mqrq
->mmc_active
.mrq
= &brq
->mrq
;
1848 mqrq
->mmc_active
.err_check
= mmc_blk_packed_err_check
;
1850 mmc_queue_bounce_pre(mqrq
);
1853 static int mmc_blk_cmd_err(struct mmc_blk_data
*md
, struct mmc_card
*card
,
1854 struct mmc_blk_request
*brq
, struct request
*req
,
1857 struct mmc_queue_req
*mq_rq
;
1858 mq_rq
= container_of(brq
, struct mmc_queue_req
, brq
);
1861 * If this is an SD card and we're writing, we can first
1862 * mark the known good sectors as ok.
1864 * If the card is not SD, we can still ok written sectors
1865 * as reported by the controller (which might be less than
1866 * the real number of written sectors, but never more).
1868 if (mmc_card_sd(card
)) {
1871 blocks
= mmc_sd_num_wr_blocks(card
);
1872 if (blocks
!= (u32
)-1) {
1873 ret
= blk_end_request(req
, 0, blocks
<< 9);
1876 if (!mmc_packed_cmd(mq_rq
->cmd_type
))
1877 ret
= blk_end_request(req
, 0, brq
->data
.bytes_xfered
);
1882 static int mmc_blk_end_packed_req(struct mmc_queue_req
*mq_rq
)
1884 struct request
*prq
;
1885 struct mmc_packed
*packed
= mq_rq
->packed
;
1886 int idx
= packed
->idx_failure
, i
= 0;
1891 while (!list_empty(&packed
->list
)) {
1892 prq
= list_entry_rq(packed
->list
.next
);
1894 /* retry from error index */
1895 packed
->nr_entries
-= idx
;
1899 if (packed
->nr_entries
== MMC_PACKED_NR_SINGLE
) {
1900 list_del_init(&prq
->queuelist
);
1901 mmc_blk_clear_packed(mq_rq
);
1905 list_del_init(&prq
->queuelist
);
1906 blk_end_request(prq
, 0, blk_rq_bytes(prq
));
1910 mmc_blk_clear_packed(mq_rq
);
1914 static void mmc_blk_abort_packed_req(struct mmc_queue_req
*mq_rq
)
1916 struct request
*prq
;
1917 struct mmc_packed
*packed
= mq_rq
->packed
;
1921 while (!list_empty(&packed
->list
)) {
1922 prq
= list_entry_rq(packed
->list
.next
);
1923 list_del_init(&prq
->queuelist
);
1924 blk_end_request(prq
, -EIO
, blk_rq_bytes(prq
));
1927 mmc_blk_clear_packed(mq_rq
);
1930 static void mmc_blk_revert_packed_req(struct mmc_queue
*mq
,
1931 struct mmc_queue_req
*mq_rq
)
1933 struct request
*prq
;
1934 struct request_queue
*q
= mq
->queue
;
1935 struct mmc_packed
*packed
= mq_rq
->packed
;
1939 while (!list_empty(&packed
->list
)) {
1940 prq
= list_entry_rq(packed
->list
.prev
);
1941 if (prq
->queuelist
.prev
!= &packed
->list
) {
1942 list_del_init(&prq
->queuelist
);
1943 spin_lock_irq(q
->queue_lock
);
1944 blk_requeue_request(mq
->queue
, prq
);
1945 spin_unlock_irq(q
->queue_lock
);
1947 list_del_init(&prq
->queuelist
);
1951 mmc_blk_clear_packed(mq_rq
);
1954 static int mmc_blk_issue_rw_rq(struct mmc_queue
*mq
, struct request
*rqc
)
1956 struct mmc_blk_data
*md
= mq
->data
;
1957 struct mmc_card
*card
= md
->queue
.card
;
1958 struct mmc_blk_request
*brq
= &mq
->mqrq_cur
->brq
;
1959 int ret
= 1, disable_multi
= 0, retry
= 0, type
, retune_retry_done
= 0;
1960 enum mmc_blk_status status
;
1961 struct mmc_queue_req
*mq_rq
;
1962 struct request
*req
= rqc
;
1963 struct mmc_async_req
*areq
;
1964 const u8 packed_nr
= 2;
1967 if (!rqc
&& !mq
->mqrq_prev
->req
)
1971 reqs
= mmc_blk_prep_packed_list(mq
, rqc
);
1976 * When 4KB native sector is enabled, only 8 blocks
1977 * multiple read or write is allowed
1979 if (mmc_large_sector(card
) &&
1980 !IS_ALIGNED(blk_rq_sectors(rqc
), 8)) {
1981 pr_err("%s: Transfer size is not 4KB sector size aligned\n",
1982 req
->rq_disk
->disk_name
);
1983 mq_rq
= mq
->mqrq_cur
;
1987 if (reqs
>= packed_nr
)
1988 mmc_blk_packed_hdr_wrq_prep(mq
->mqrq_cur
,
1991 mmc_blk_rw_rq_prep(mq
->mqrq_cur
, card
, 0, mq
);
1992 areq
= &mq
->mqrq_cur
->mmc_active
;
1995 areq
= mmc_start_req(card
->host
, areq
, (int *) &status
);
1997 if (status
== MMC_BLK_NEW_REQUEST
)
1998 mq
->flags
|= MMC_QUEUE_NEW_REQUEST
;
2002 mq_rq
= container_of(areq
, struct mmc_queue_req
, mmc_active
);
2005 type
= rq_data_dir(req
) == READ
? MMC_BLK_READ
: MMC_BLK_WRITE
;
2006 mmc_queue_bounce_post(mq_rq
);
2009 case MMC_BLK_SUCCESS
:
2010 case MMC_BLK_PARTIAL
:
2012 * A block was successfully transferred.
2014 mmc_blk_reset_success(md
, type
);
2016 if (mmc_packed_cmd(mq_rq
->cmd_type
)) {
2017 ret
= mmc_blk_end_packed_req(mq_rq
);
2020 ret
= blk_end_request(req
, 0,
2021 brq
->data
.bytes_xfered
);
2025 * If the blk_end_request function returns non-zero even
2026 * though all data has been transferred and no errors
2027 * were returned by the host controller, it's a bug.
2029 if (status
== MMC_BLK_SUCCESS
&& ret
) {
2030 pr_err("%s BUG rq_tot %d d_xfer %d\n",
2031 __func__
, blk_rq_bytes(req
),
2032 brq
->data
.bytes_xfered
);
2037 case MMC_BLK_CMD_ERR
:
2038 ret
= mmc_blk_cmd_err(md
, card
, brq
, req
, ret
);
2039 if (mmc_blk_reset(md
, card
->host
, type
))
2045 retune_retry_done
= brq
->retune_retry_done
;
2050 if (!mmc_blk_reset(md
, card
->host
, type
))
2053 case MMC_BLK_DATA_ERR
: {
2056 err
= mmc_blk_reset(md
, card
->host
, type
);
2059 if (err
== -ENODEV
||
2060 mmc_packed_cmd(mq_rq
->cmd_type
))
2064 case MMC_BLK_ECC_ERR
:
2065 if (brq
->data
.blocks
> 1) {
2066 /* Redo read one sector at a time */
2067 pr_warn("%s: retrying using single block read\n",
2068 req
->rq_disk
->disk_name
);
2073 * After an error, we redo I/O one sector at a
2074 * time, so we only reach here after trying to
2075 * read a single sector.
2077 ret
= blk_end_request(req
, -EIO
,
2082 case MMC_BLK_NOMEDIUM
:
2085 pr_err("%s: Unhandled return value (%d)",
2086 req
->rq_disk
->disk_name
, status
);
2091 if (mmc_packed_cmd(mq_rq
->cmd_type
)) {
2092 if (!mq_rq
->packed
->retries
)
2094 mmc_blk_packed_hdr_wrq_prep(mq_rq
, card
, mq
);
2095 mmc_start_req(card
->host
,
2096 &mq_rq
->mmc_active
, NULL
);
2100 * In case of a incomplete request
2101 * prepare it again and resend.
2103 mmc_blk_rw_rq_prep(mq_rq
, card
,
2105 mmc_start_req(card
->host
,
2106 &mq_rq
->mmc_active
, NULL
);
2108 mq_rq
->brq
.retune_retry_done
= retune_retry_done
;
2115 if (mmc_packed_cmd(mq_rq
->cmd_type
)) {
2116 mmc_blk_abort_packed_req(mq_rq
);
2118 if (mmc_card_removed(card
))
2119 req
->cmd_flags
|= REQ_QUIET
;
2121 ret
= blk_end_request(req
, -EIO
,
2122 blk_rq_cur_bytes(req
));
2127 if (mmc_card_removed(card
)) {
2128 rqc
->cmd_flags
|= REQ_QUIET
;
2129 blk_end_request_all(rqc
, -EIO
);
2132 * If current request is packed, it needs to put back.
2134 if (mmc_packed_cmd(mq
->mqrq_cur
->cmd_type
))
2135 mmc_blk_revert_packed_req(mq
, mq
->mqrq_cur
);
2137 mmc_blk_rw_rq_prep(mq
->mqrq_cur
, card
, 0, mq
);
2138 mmc_start_req(card
->host
,
2139 &mq
->mqrq_cur
->mmc_active
, NULL
);
2146 static int mmc_blk_issue_rq(struct mmc_queue
*mq
, struct request
*req
)
2149 struct mmc_blk_data
*md
= mq
->data
;
2150 struct mmc_card
*card
= md
->queue
.card
;
2151 struct mmc_host
*host
= card
->host
;
2152 unsigned long flags
;
2153 unsigned int cmd_flags
= req
? req
->cmd_flags
: 0;
2155 if (req
&& !mq
->mqrq_prev
->req
)
2156 /* claim host only for the first request */
2159 ret
= mmc_blk_part_switch(card
, md
);
2162 blk_end_request_all(req
, -EIO
);
2168 mq
->flags
&= ~MMC_QUEUE_NEW_REQUEST
;
2169 if (cmd_flags
& REQ_DISCARD
) {
2170 /* complete ongoing async transfer before issuing discard */
2171 if (card
->host
->areq
)
2172 mmc_blk_issue_rw_rq(mq
, NULL
);
2173 if (req
->cmd_flags
& REQ_SECURE
)
2174 ret
= mmc_blk_issue_secdiscard_rq(mq
, req
);
2176 ret
= mmc_blk_issue_discard_rq(mq
, req
);
2177 } else if (cmd_flags
& REQ_FLUSH
) {
2178 /* complete ongoing async transfer before issuing flush */
2179 if (card
->host
->areq
)
2180 mmc_blk_issue_rw_rq(mq
, NULL
);
2181 ret
= mmc_blk_issue_flush(mq
, req
);
2183 if (!req
&& host
->areq
) {
2184 spin_lock_irqsave(&host
->context_info
.lock
, flags
);
2185 host
->context_info
.is_waiting_last_req
= true;
2186 spin_unlock_irqrestore(&host
->context_info
.lock
, flags
);
2188 ret
= mmc_blk_issue_rw_rq(mq
, req
);
2192 if ((!req
&& !(mq
->flags
& MMC_QUEUE_NEW_REQUEST
)) ||
2193 (cmd_flags
& MMC_REQ_SPECIAL_MASK
))
2195 * Release host when there are no more requests
2196 * and after special request(discard, flush) is done.
2197 * In case sepecial request, there is no reentry to
2198 * the 'mmc_blk_issue_rq' with 'mqrq_prev->req'.
2204 static inline int mmc_blk_readonly(struct mmc_card
*card
)
2206 return mmc_card_readonly(card
) ||
2207 !(card
->csd
.cmdclass
& CCC_BLOCK_WRITE
);
2210 static struct mmc_blk_data
*mmc_blk_alloc_req(struct mmc_card
*card
,
2211 struct device
*parent
,
2214 const char *subname
,
2217 struct mmc_blk_data
*md
;
2221 if (!ida_pre_get(&mmc_blk_ida
, GFP_KERNEL
))
2222 return ERR_PTR(-ENOMEM
);
2224 spin_lock(&mmc_blk_lock
);
2225 ret
= ida_get_new(&mmc_blk_ida
, &devidx
);
2226 spin_unlock(&mmc_blk_lock
);
2231 return ERR_PTR(ret
);
2233 if (devidx
>= max_devices
) {
2238 md
= kzalloc(sizeof(struct mmc_blk_data
), GFP_KERNEL
);
2244 md
->area_type
= area_type
;
2247 * Set the read-only status based on the supported commands
2248 * and the write protect switch.
2250 md
->read_only
= mmc_blk_readonly(card
);
2252 md
->disk
= alloc_disk(perdev_minors
);
2253 if (md
->disk
== NULL
) {
2258 spin_lock_init(&md
->lock
);
2259 INIT_LIST_HEAD(&md
->part
);
2262 ret
= mmc_init_queue(&md
->queue
, card
, &md
->lock
, subname
);
2266 md
->queue
.issue_fn
= mmc_blk_issue_rq
;
2267 md
->queue
.data
= md
;
2269 md
->disk
->major
= MMC_BLOCK_MAJOR
;
2270 md
->disk
->first_minor
= devidx
* perdev_minors
;
2271 md
->disk
->fops
= &mmc_bdops
;
2272 md
->disk
->private_data
= md
;
2273 md
->disk
->queue
= md
->queue
.queue
;
2274 md
->disk
->driverfs_dev
= parent
;
2275 set_disk_ro(md
->disk
, md
->read_only
|| default_ro
);
2276 md
->disk
->flags
= GENHD_FL_EXT_DEVT
;
2277 if (area_type
& (MMC_BLK_DATA_AREA_RPMB
| MMC_BLK_DATA_AREA_BOOT
))
2278 md
->disk
->flags
|= GENHD_FL_NO_PART_SCAN
;
2281 * As discussed on lkml, GENHD_FL_REMOVABLE should:
2283 * - be set for removable media with permanent block devices
2284 * - be unset for removable block devices with permanent media
2286 * Since MMC block devices clearly fall under the second
2287 * case, we do not set GENHD_FL_REMOVABLE. Userspace
2288 * should use the block device creation/destruction hotplug
2289 * messages to tell when the card is present.
2292 snprintf(md
->disk
->disk_name
, sizeof(md
->disk
->disk_name
),
2293 "mmcblk%u%s", card
->host
->index
, subname
? subname
: "");
2295 if (mmc_card_mmc(card
))
2296 blk_queue_logical_block_size(md
->queue
.queue
,
2297 card
->ext_csd
.data_sector_size
);
2299 blk_queue_logical_block_size(md
->queue
.queue
, 512);
2301 set_capacity(md
->disk
, size
);
2303 if (mmc_host_cmd23(card
->host
)) {
2304 if (mmc_card_mmc(card
) ||
2305 (mmc_card_sd(card
) &&
2306 card
->scr
.cmds
& SD_SCR_CMD23_SUPPORT
))
2307 md
->flags
|= MMC_BLK_CMD23
;
2310 if (mmc_card_mmc(card
) &&
2311 md
->flags
& MMC_BLK_CMD23
&&
2312 ((card
->ext_csd
.rel_param
& EXT_CSD_WR_REL_PARAM_EN
) ||
2313 card
->ext_csd
.rel_sectors
)) {
2314 md
->flags
|= MMC_BLK_REL_WR
;
2315 blk_queue_write_cache(md
->queue
.queue
, true, true);
2318 if (mmc_card_mmc(card
) &&
2319 (area_type
== MMC_BLK_DATA_AREA_MAIN
) &&
2320 (md
->flags
& MMC_BLK_CMD23
) &&
2321 card
->ext_csd
.packed_event_en
) {
2322 if (!mmc_packed_init(&md
->queue
, card
))
2323 md
->flags
|= MMC_BLK_PACKED_CMD
;
2333 spin_lock(&mmc_blk_lock
);
2334 ida_remove(&mmc_blk_ida
, devidx
);
2335 spin_unlock(&mmc_blk_lock
);
2336 return ERR_PTR(ret
);
2339 static struct mmc_blk_data
*mmc_blk_alloc(struct mmc_card
*card
)
2343 if (!mmc_card_sd(card
) && mmc_card_blockaddr(card
)) {
2345 * The EXT_CSD sector count is in number or 512 byte
2348 size
= card
->ext_csd
.sectors
;
2351 * The CSD capacity field is in units of read_blkbits.
2352 * set_capacity takes units of 512 bytes.
2354 size
= (typeof(sector_t
))card
->csd
.capacity
2355 << (card
->csd
.read_blkbits
- 9);
2358 return mmc_blk_alloc_req(card
, &card
->dev
, size
, false, NULL
,
2359 MMC_BLK_DATA_AREA_MAIN
);
2362 static int mmc_blk_alloc_part(struct mmc_card
*card
,
2363 struct mmc_blk_data
*md
,
2364 unsigned int part_type
,
2367 const char *subname
,
2371 struct mmc_blk_data
*part_md
;
2373 part_md
= mmc_blk_alloc_req(card
, disk_to_dev(md
->disk
), size
, default_ro
,
2374 subname
, area_type
);
2375 if (IS_ERR(part_md
))
2376 return PTR_ERR(part_md
);
2377 part_md
->part_type
= part_type
;
2378 list_add(&part_md
->part
, &md
->part
);
2380 string_get_size((u64
)get_capacity(part_md
->disk
), 512, STRING_UNITS_2
,
2381 cap_str
, sizeof(cap_str
));
2382 pr_info("%s: %s %s partition %u %s\n",
2383 part_md
->disk
->disk_name
, mmc_card_id(card
),
2384 mmc_card_name(card
), part_md
->part_type
, cap_str
);
2388 /* MMC Physical partitions consist of two boot partitions and
2389 * up to four general purpose partitions.
2390 * For each partition enabled in EXT_CSD a block device will be allocatedi
2391 * to provide access to the partition.
2394 static int mmc_blk_alloc_parts(struct mmc_card
*card
, struct mmc_blk_data
*md
)
2398 if (!mmc_card_mmc(card
))
2401 for (idx
= 0; idx
< card
->nr_parts
; idx
++) {
2402 if (card
->part
[idx
].size
) {
2403 ret
= mmc_blk_alloc_part(card
, md
,
2404 card
->part
[idx
].part_cfg
,
2405 card
->part
[idx
].size
>> 9,
2406 card
->part
[idx
].force_ro
,
2407 card
->part
[idx
].name
,
2408 card
->part
[idx
].area_type
);
2417 static void mmc_blk_remove_req(struct mmc_blk_data
*md
)
2419 struct mmc_card
*card
;
2423 * Flush remaining requests and free queues. It
2424 * is freeing the queue that stops new requests
2425 * from being accepted.
2427 card
= md
->queue
.card
;
2428 mmc_cleanup_queue(&md
->queue
);
2429 if (md
->flags
& MMC_BLK_PACKED_CMD
)
2430 mmc_packed_clean(&md
->queue
);
2431 if (md
->disk
->flags
& GENHD_FL_UP
) {
2432 device_remove_file(disk_to_dev(md
->disk
), &md
->force_ro
);
2433 if ((md
->area_type
& MMC_BLK_DATA_AREA_BOOT
) &&
2434 card
->ext_csd
.boot_ro_lockable
)
2435 device_remove_file(disk_to_dev(md
->disk
),
2436 &md
->power_ro_lock
);
2438 del_gendisk(md
->disk
);
2444 static void mmc_blk_remove_parts(struct mmc_card
*card
,
2445 struct mmc_blk_data
*md
)
2447 struct list_head
*pos
, *q
;
2448 struct mmc_blk_data
*part_md
;
2450 list_for_each_safe(pos
, q
, &md
->part
) {
2451 part_md
= list_entry(pos
, struct mmc_blk_data
, part
);
2453 mmc_blk_remove_req(part_md
);
2457 static int mmc_add_disk(struct mmc_blk_data
*md
)
2460 struct mmc_card
*card
= md
->queue
.card
;
2463 md
->force_ro
.show
= force_ro_show
;
2464 md
->force_ro
.store
= force_ro_store
;
2465 sysfs_attr_init(&md
->force_ro
.attr
);
2466 md
->force_ro
.attr
.name
= "force_ro";
2467 md
->force_ro
.attr
.mode
= S_IRUGO
| S_IWUSR
;
2468 ret
= device_create_file(disk_to_dev(md
->disk
), &md
->force_ro
);
2472 if ((md
->area_type
& MMC_BLK_DATA_AREA_BOOT
) &&
2473 card
->ext_csd
.boot_ro_lockable
) {
2476 if (card
->ext_csd
.boot_ro_lock
& EXT_CSD_BOOT_WP_B_PWR_WP_DIS
)
2479 mode
= S_IRUGO
| S_IWUSR
;
2481 md
->power_ro_lock
.show
= power_ro_lock_show
;
2482 md
->power_ro_lock
.store
= power_ro_lock_store
;
2483 sysfs_attr_init(&md
->power_ro_lock
.attr
);
2484 md
->power_ro_lock
.attr
.mode
= mode
;
2485 md
->power_ro_lock
.attr
.name
=
2486 "ro_lock_until_next_power_on";
2487 ret
= device_create_file(disk_to_dev(md
->disk
),
2488 &md
->power_ro_lock
);
2490 goto power_ro_lock_fail
;
2495 device_remove_file(disk_to_dev(md
->disk
), &md
->force_ro
);
2497 del_gendisk(md
->disk
);
2502 #define CID_MANFID_SANDISK 0x2
2503 #define CID_MANFID_TOSHIBA 0x11
2504 #define CID_MANFID_MICRON 0x13
2505 #define CID_MANFID_SAMSUNG 0x15
2506 #define CID_MANFID_KINGSTON 0x70
2508 static const struct mmc_fixup blk_fixups
[] =
2510 MMC_FIXUP("SEM02G", CID_MANFID_SANDISK
, 0x100, add_quirk
,
2511 MMC_QUIRK_INAND_CMD38
),
2512 MMC_FIXUP("SEM04G", CID_MANFID_SANDISK
, 0x100, add_quirk
,
2513 MMC_QUIRK_INAND_CMD38
),
2514 MMC_FIXUP("SEM08G", CID_MANFID_SANDISK
, 0x100, add_quirk
,
2515 MMC_QUIRK_INAND_CMD38
),
2516 MMC_FIXUP("SEM16G", CID_MANFID_SANDISK
, 0x100, add_quirk
,
2517 MMC_QUIRK_INAND_CMD38
),
2518 MMC_FIXUP("SEM32G", CID_MANFID_SANDISK
, 0x100, add_quirk
,
2519 MMC_QUIRK_INAND_CMD38
),
2522 * Some MMC cards experience performance degradation with CMD23
2523 * instead of CMD12-bounded multiblock transfers. For now we'll
2524 * black list what's bad...
2525 * - Certain Toshiba cards.
2527 * N.B. This doesn't affect SD cards.
2529 MMC_FIXUP("SDMB-32", CID_MANFID_SANDISK
, CID_OEMID_ANY
, add_quirk_mmc
,
2530 MMC_QUIRK_BLK_NO_CMD23
),
2531 MMC_FIXUP("SDM032", CID_MANFID_SANDISK
, CID_OEMID_ANY
, add_quirk_mmc
,
2532 MMC_QUIRK_BLK_NO_CMD23
),
2533 MMC_FIXUP("MMC08G", CID_MANFID_TOSHIBA
, CID_OEMID_ANY
, add_quirk_mmc
,
2534 MMC_QUIRK_BLK_NO_CMD23
),
2535 MMC_FIXUP("MMC16G", CID_MANFID_TOSHIBA
, CID_OEMID_ANY
, add_quirk_mmc
,
2536 MMC_QUIRK_BLK_NO_CMD23
),
2537 MMC_FIXUP("MMC32G", CID_MANFID_TOSHIBA
, CID_OEMID_ANY
, add_quirk_mmc
,
2538 MMC_QUIRK_BLK_NO_CMD23
),
2541 * Some MMC cards need longer data read timeout than indicated in CSD.
2543 MMC_FIXUP(CID_NAME_ANY
, CID_MANFID_MICRON
, 0x200, add_quirk_mmc
,
2544 MMC_QUIRK_LONG_READ_TIME
),
2545 MMC_FIXUP("008GE0", CID_MANFID_TOSHIBA
, CID_OEMID_ANY
, add_quirk_mmc
,
2546 MMC_QUIRK_LONG_READ_TIME
),
2549 * On these Samsung MoviNAND parts, performing secure erase or
2550 * secure trim can result in unrecoverable corruption due to a
2553 MMC_FIXUP("M8G2FA", CID_MANFID_SAMSUNG
, CID_OEMID_ANY
, add_quirk_mmc
,
2554 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN
),
2555 MMC_FIXUP("MAG4FA", CID_MANFID_SAMSUNG
, CID_OEMID_ANY
, add_quirk_mmc
,
2556 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN
),
2557 MMC_FIXUP("MBG8FA", CID_MANFID_SAMSUNG
, CID_OEMID_ANY
, add_quirk_mmc
,
2558 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN
),
2559 MMC_FIXUP("MCGAFA", CID_MANFID_SAMSUNG
, CID_OEMID_ANY
, add_quirk_mmc
,
2560 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN
),
2561 MMC_FIXUP("VAL00M", CID_MANFID_SAMSUNG
, CID_OEMID_ANY
, add_quirk_mmc
,
2562 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN
),
2563 MMC_FIXUP("VYL00M", CID_MANFID_SAMSUNG
, CID_OEMID_ANY
, add_quirk_mmc
,
2564 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN
),
2565 MMC_FIXUP("KYL00M", CID_MANFID_SAMSUNG
, CID_OEMID_ANY
, add_quirk_mmc
,
2566 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN
),
2567 MMC_FIXUP("VZL00M", CID_MANFID_SAMSUNG
, CID_OEMID_ANY
, add_quirk_mmc
,
2568 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN
),
2571 * On Some Kingston eMMCs, performing trim can result in
2572 * unrecoverable data conrruption occasionally due to a firmware bug.
2574 MMC_FIXUP("V10008", CID_MANFID_KINGSTON
, CID_OEMID_ANY
, add_quirk_mmc
,
2575 MMC_QUIRK_TRIM_BROKEN
),
2576 MMC_FIXUP("V10016", CID_MANFID_KINGSTON
, CID_OEMID_ANY
, add_quirk_mmc
,
2577 MMC_QUIRK_TRIM_BROKEN
),
2582 static int mmc_blk_probe(struct mmc_card
*card
)
2584 struct mmc_blk_data
*md
, *part_md
;
2588 * Check that the card supports the command class(es) we need.
2590 if (!(card
->csd
.cmdclass
& CCC_BLOCK_READ
))
2593 mmc_fixup_device(card
, blk_fixups
);
2595 md
= mmc_blk_alloc(card
);
2599 string_get_size((u64
)get_capacity(md
->disk
), 512, STRING_UNITS_2
,
2600 cap_str
, sizeof(cap_str
));
2601 pr_info("%s: %s %s %s %s\n",
2602 md
->disk
->disk_name
, mmc_card_id(card
), mmc_card_name(card
),
2603 cap_str
, md
->read_only
? "(ro)" : "");
2605 if (mmc_blk_alloc_parts(card
, md
))
2608 dev_set_drvdata(&card
->dev
, md
);
2610 if (mmc_add_disk(md
))
2613 list_for_each_entry(part_md
, &md
->part
, part
) {
2614 if (mmc_add_disk(part_md
))
2618 pm_runtime_set_autosuspend_delay(&card
->dev
, 3000);
2619 pm_runtime_use_autosuspend(&card
->dev
);
2622 * Don't enable runtime PM for SD-combo cards here. Leave that
2623 * decision to be taken during the SDIO init sequence instead.
2625 if (card
->type
!= MMC_TYPE_SD_COMBO
) {
2626 pm_runtime_set_active(&card
->dev
);
2627 pm_runtime_enable(&card
->dev
);
2633 mmc_blk_remove_parts(card
, md
);
2634 mmc_blk_remove_req(md
);
2638 static void mmc_blk_remove(struct mmc_card
*card
)
2640 struct mmc_blk_data
*md
= dev_get_drvdata(&card
->dev
);
2642 mmc_blk_remove_parts(card
, md
);
2643 pm_runtime_get_sync(&card
->dev
);
2644 mmc_claim_host(card
->host
);
2645 mmc_blk_part_switch(card
, md
);
2646 mmc_release_host(card
->host
);
2647 if (card
->type
!= MMC_TYPE_SD_COMBO
)
2648 pm_runtime_disable(&card
->dev
);
2649 pm_runtime_put_noidle(&card
->dev
);
2650 mmc_blk_remove_req(md
);
2651 dev_set_drvdata(&card
->dev
, NULL
);
2654 static int _mmc_blk_suspend(struct mmc_card
*card
)
2656 struct mmc_blk_data
*part_md
;
2657 struct mmc_blk_data
*md
= dev_get_drvdata(&card
->dev
);
2660 mmc_queue_suspend(&md
->queue
);
2661 list_for_each_entry(part_md
, &md
->part
, part
) {
2662 mmc_queue_suspend(&part_md
->queue
);
2668 static void mmc_blk_shutdown(struct mmc_card
*card
)
2670 _mmc_blk_suspend(card
);
2673 #ifdef CONFIG_PM_SLEEP
2674 static int mmc_blk_suspend(struct device
*dev
)
2676 struct mmc_card
*card
= mmc_dev_to_card(dev
);
2678 return _mmc_blk_suspend(card
);
2681 static int mmc_blk_resume(struct device
*dev
)
2683 struct mmc_blk_data
*part_md
;
2684 struct mmc_blk_data
*md
= dev_get_drvdata(dev
);
2688 * Resume involves the card going into idle state,
2689 * so current partition is always the main one.
2691 md
->part_curr
= md
->part_type
;
2692 mmc_queue_resume(&md
->queue
);
2693 list_for_each_entry(part_md
, &md
->part
, part
) {
2694 mmc_queue_resume(&part_md
->queue
);
2701 static SIMPLE_DEV_PM_OPS(mmc_blk_pm_ops
, mmc_blk_suspend
, mmc_blk_resume
);
2703 static struct mmc_driver mmc_driver
= {
2706 .pm
= &mmc_blk_pm_ops
,
2708 .probe
= mmc_blk_probe
,
2709 .remove
= mmc_blk_remove
,
2710 .shutdown
= mmc_blk_shutdown
,
2713 static int __init
mmc_blk_init(void)
2717 if (perdev_minors
!= CONFIG_MMC_BLOCK_MINORS
)
2718 pr_info("mmcblk: using %d minors per device\n", perdev_minors
);
2720 max_devices
= min(MAX_DEVICES
, (1 << MINORBITS
) / perdev_minors
);
2722 res
= register_blkdev(MMC_BLOCK_MAJOR
, "mmc");
2726 res
= mmc_register_driver(&mmc_driver
);
2732 unregister_blkdev(MMC_BLOCK_MAJOR
, "mmc");
2737 static void __exit
mmc_blk_exit(void)
2739 mmc_unregister_driver(&mmc_driver
);
2740 unregister_blkdev(MMC_BLOCK_MAJOR
, "mmc");
2743 module_init(mmc_blk_init
);
2744 module_exit(mmc_blk_exit
);
2746 MODULE_LICENSE("GPL");
2747 MODULE_DESCRIPTION("Multimedia Card (MMC) block device driver");