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.
96 struct device
*parent
;
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 reset_done
;
110 #define MMC_BLK_READ BIT(0)
111 #define MMC_BLK_WRITE BIT(1)
112 #define MMC_BLK_DISCARD BIT(2)
113 #define MMC_BLK_SECDISCARD BIT(3)
116 * Only set in main mmc_blk_data associated
117 * with mmc_card with dev_set_drvdata, and keeps
118 * track of the current selected device partition.
120 unsigned int part_curr
;
121 struct device_attribute force_ro
;
122 struct device_attribute power_ro_lock
;
126 static DEFINE_MUTEX(open_lock
);
129 MMC_PACKED_NR_IDX
= -1,
131 MMC_PACKED_NR_SINGLE
,
134 module_param(perdev_minors
, int, 0444);
135 MODULE_PARM_DESC(perdev_minors
, "Minors numbers to allocate per device");
137 static inline int mmc_blk_part_switch(struct mmc_card
*card
,
138 struct mmc_blk_data
*md
);
139 static int get_card_status(struct mmc_card
*card
, u32
*status
, int retries
);
141 static inline void mmc_blk_clear_packed(struct mmc_queue_req
*mqrq
)
143 struct mmc_packed
*packed
= mqrq
->packed
;
145 mqrq
->cmd_type
= MMC_PACKED_NONE
;
146 packed
->nr_entries
= MMC_PACKED_NR_ZERO
;
147 packed
->idx_failure
= MMC_PACKED_NR_IDX
;
152 static struct mmc_blk_data
*mmc_blk_get(struct gendisk
*disk
)
154 struct mmc_blk_data
*md
;
156 mutex_lock(&open_lock
);
157 md
= disk
->private_data
;
158 if (md
&& md
->usage
== 0)
162 mutex_unlock(&open_lock
);
167 static inline int mmc_get_devidx(struct gendisk
*disk
)
169 int devidx
= disk
->first_minor
/ perdev_minors
;
173 static void mmc_blk_put(struct mmc_blk_data
*md
)
175 mutex_lock(&open_lock
);
177 if (md
->usage
== 0) {
178 int devidx
= mmc_get_devidx(md
->disk
);
179 blk_cleanup_queue(md
->queue
.queue
);
181 spin_lock(&mmc_blk_lock
);
182 ida_remove(&mmc_blk_ida
, devidx
);
183 spin_unlock(&mmc_blk_lock
);
188 mutex_unlock(&open_lock
);
191 static ssize_t
power_ro_lock_show(struct device
*dev
,
192 struct device_attribute
*attr
, char *buf
)
195 struct mmc_blk_data
*md
= mmc_blk_get(dev_to_disk(dev
));
196 struct mmc_card
*card
= md
->queue
.card
;
199 if (card
->ext_csd
.boot_ro_lock
& EXT_CSD_BOOT_WP_B_PERM_WP_EN
)
201 else if (card
->ext_csd
.boot_ro_lock
& EXT_CSD_BOOT_WP_B_PWR_WP_EN
)
204 ret
= snprintf(buf
, PAGE_SIZE
, "%d\n", locked
);
211 static ssize_t
power_ro_lock_store(struct device
*dev
,
212 struct device_attribute
*attr
, const char *buf
, size_t count
)
215 struct mmc_blk_data
*md
, *part_md
;
216 struct mmc_card
*card
;
219 if (kstrtoul(buf
, 0, &set
))
225 md
= mmc_blk_get(dev_to_disk(dev
));
226 card
= md
->queue
.card
;
230 ret
= mmc_switch(card
, EXT_CSD_CMD_SET_NORMAL
, EXT_CSD_BOOT_WP
,
231 card
->ext_csd
.boot_ro_lock
|
232 EXT_CSD_BOOT_WP_B_PWR_WP_EN
,
233 card
->ext_csd
.part_time
);
235 pr_err("%s: Locking boot partition ro until next power on failed: %d\n", md
->disk
->disk_name
, ret
);
237 card
->ext_csd
.boot_ro_lock
|= EXT_CSD_BOOT_WP_B_PWR_WP_EN
;
242 pr_info("%s: Locking boot partition ro until next power on\n",
243 md
->disk
->disk_name
);
244 set_disk_ro(md
->disk
, 1);
246 list_for_each_entry(part_md
, &md
->part
, part
)
247 if (part_md
->area_type
== MMC_BLK_DATA_AREA_BOOT
) {
248 pr_info("%s: Locking boot partition ro until next power on\n", part_md
->disk
->disk_name
);
249 set_disk_ro(part_md
->disk
, 1);
257 static ssize_t
force_ro_show(struct device
*dev
, struct device_attribute
*attr
,
261 struct mmc_blk_data
*md
= mmc_blk_get(dev_to_disk(dev
));
263 ret
= snprintf(buf
, PAGE_SIZE
, "%d\n",
264 get_disk_ro(dev_to_disk(dev
)) ^
270 static ssize_t
force_ro_store(struct device
*dev
, struct device_attribute
*attr
,
271 const char *buf
, size_t count
)
275 struct mmc_blk_data
*md
= mmc_blk_get(dev_to_disk(dev
));
276 unsigned long set
= simple_strtoul(buf
, &end
, 0);
282 set_disk_ro(dev_to_disk(dev
), set
|| md
->read_only
);
289 static int mmc_blk_open(struct block_device
*bdev
, fmode_t mode
)
291 struct mmc_blk_data
*md
= mmc_blk_get(bdev
->bd_disk
);
294 mutex_lock(&block_mutex
);
297 check_disk_change(bdev
);
300 if ((mode
& FMODE_WRITE
) && md
->read_only
) {
305 mutex_unlock(&block_mutex
);
310 static void mmc_blk_release(struct gendisk
*disk
, fmode_t mode
)
312 struct mmc_blk_data
*md
= disk
->private_data
;
314 mutex_lock(&block_mutex
);
316 mutex_unlock(&block_mutex
);
320 mmc_blk_getgeo(struct block_device
*bdev
, struct hd_geometry
*geo
)
322 geo
->cylinders
= get_capacity(bdev
->bd_disk
) / (4 * 16);
328 struct mmc_blk_ioc_data
{
329 struct mmc_ioc_cmd ic
;
334 static struct mmc_blk_ioc_data
*mmc_blk_ioctl_copy_from_user(
335 struct mmc_ioc_cmd __user
*user
)
337 struct mmc_blk_ioc_data
*idata
;
340 idata
= kmalloc(sizeof(*idata
), GFP_KERNEL
);
346 if (copy_from_user(&idata
->ic
, user
, sizeof(idata
->ic
))) {
351 idata
->buf_bytes
= (u64
) idata
->ic
.blksz
* idata
->ic
.blocks
;
352 if (idata
->buf_bytes
> MMC_IOC_MAX_BYTES
) {
357 if (!idata
->buf_bytes
) {
362 idata
->buf
= kmalloc(idata
->buf_bytes
, GFP_KERNEL
);
368 if (copy_from_user(idata
->buf
, (void __user
*)(unsigned long)
369 idata
->ic
.data_ptr
, idata
->buf_bytes
)) {
384 static int mmc_blk_ioctl_copy_to_user(struct mmc_ioc_cmd __user
*ic_ptr
,
385 struct mmc_blk_ioc_data
*idata
)
387 struct mmc_ioc_cmd
*ic
= &idata
->ic
;
389 if (copy_to_user(&(ic_ptr
->response
), ic
->response
,
390 sizeof(ic
->response
)))
393 if (!idata
->ic
.write_flag
) {
394 if (copy_to_user((void __user
*)(unsigned long)ic
->data_ptr
,
395 idata
->buf
, idata
->buf_bytes
))
402 static int ioctl_rpmb_card_status_poll(struct mmc_card
*card
, u32
*status
,
408 if (!status
|| !retries_max
)
412 err
= get_card_status(card
, status
, 5);
416 if (!R1_STATUS(*status
) &&
417 (R1_CURRENT_STATE(*status
) != R1_STATE_PRG
))
418 break; /* RPMB programming operation complete */
421 * Rechedule to give the MMC device a chance to continue
422 * processing the previous command without being polled too
425 usleep_range(1000, 5000);
426 } while (++retry_count
< retries_max
);
428 if (retry_count
== retries_max
)
434 static int ioctl_do_sanitize(struct mmc_card
*card
)
438 if (!mmc_can_sanitize(card
)) {
439 pr_warn("%s: %s - SANITIZE is not supported\n",
440 mmc_hostname(card
->host
), __func__
);
445 pr_debug("%s: %s - SANITIZE IN PROGRESS...\n",
446 mmc_hostname(card
->host
), __func__
);
448 err
= mmc_switch(card
, EXT_CSD_CMD_SET_NORMAL
,
449 EXT_CSD_SANITIZE_START
, 1,
450 MMC_SANITIZE_REQ_TIMEOUT
);
453 pr_err("%s: %s - EXT_CSD_SANITIZE_START failed. err=%d\n",
454 mmc_hostname(card
->host
), __func__
, err
);
456 pr_debug("%s: %s - SANITIZE COMPLETED\n", mmc_hostname(card
->host
),
462 static int __mmc_blk_ioctl_cmd(struct mmc_card
*card
, struct mmc_blk_data
*md
,
463 struct mmc_blk_ioc_data
*idata
)
465 struct mmc_command cmd
= {0};
466 struct mmc_data data
= {0};
467 struct mmc_request mrq
= {NULL
};
468 struct scatterlist sg
;
473 if (!card
|| !md
|| !idata
)
476 if (md
->area_type
& MMC_BLK_DATA_AREA_RPMB
)
479 cmd
.opcode
= idata
->ic
.opcode
;
480 cmd
.arg
= idata
->ic
.arg
;
481 cmd
.flags
= idata
->ic
.flags
;
483 if (idata
->buf_bytes
) {
486 data
.blksz
= idata
->ic
.blksz
;
487 data
.blocks
= idata
->ic
.blocks
;
489 sg_init_one(data
.sg
, idata
->buf
, idata
->buf_bytes
);
491 if (idata
->ic
.write_flag
)
492 data
.flags
= MMC_DATA_WRITE
;
494 data
.flags
= MMC_DATA_READ
;
496 /* data.flags must already be set before doing this. */
497 mmc_set_data_timeout(&data
, card
);
499 /* Allow overriding the timeout_ns for empirical tuning. */
500 if (idata
->ic
.data_timeout_ns
)
501 data
.timeout_ns
= idata
->ic
.data_timeout_ns
;
503 if ((cmd
.flags
& MMC_RSP_R1B
) == MMC_RSP_R1B
) {
505 * Pretend this is a data transfer and rely on the
506 * host driver to compute timeout. When all host
507 * drivers support cmd.cmd_timeout for R1B, this
511 * cmd.cmd_timeout = idata->ic.cmd_timeout_ms;
513 data
.timeout_ns
= idata
->ic
.cmd_timeout_ms
* 1000000;
521 err
= mmc_blk_part_switch(card
, md
);
525 if (idata
->ic
.is_acmd
) {
526 err
= mmc_app_cmd(card
->host
, card
);
532 err
= mmc_set_blockcount(card
, data
.blocks
,
533 idata
->ic
.write_flag
& (1 << 31));
538 if ((MMC_EXTRACT_INDEX_FROM_ARG(cmd
.arg
) == EXT_CSD_SANITIZE_START
) &&
539 (cmd
.opcode
== MMC_SWITCH
)) {
540 err
= ioctl_do_sanitize(card
);
543 pr_err("%s: ioctl_do_sanitize() failed. err = %d",
549 mmc_wait_for_req(card
->host
, &mrq
);
552 dev_err(mmc_dev(card
->host
), "%s: cmd error %d\n",
553 __func__
, cmd
.error
);
557 dev_err(mmc_dev(card
->host
), "%s: data error %d\n",
558 __func__
, data
.error
);
563 * According to the SD specs, some commands require a delay after
564 * issuing the command.
566 if (idata
->ic
.postsleep_min_us
)
567 usleep_range(idata
->ic
.postsleep_min_us
, idata
->ic
.postsleep_max_us
);
569 memcpy(&(idata
->ic
.response
), cmd
.resp
, sizeof(cmd
.resp
));
573 * Ensure RPMB command has completed by polling CMD13
576 err
= ioctl_rpmb_card_status_poll(card
, &status
, 5);
578 dev_err(mmc_dev(card
->host
),
579 "%s: Card Status=0x%08X, error %d\n",
580 __func__
, status
, err
);
586 static int mmc_blk_ioctl_cmd(struct block_device
*bdev
,
587 struct mmc_ioc_cmd __user
*ic_ptr
)
589 struct mmc_blk_ioc_data
*idata
;
590 struct mmc_blk_data
*md
;
591 struct mmc_card
*card
;
592 int err
= 0, ioc_err
= 0;
595 * The caller must have CAP_SYS_RAWIO, and must be calling this on the
596 * whole block device, not on a partition. This prevents overspray
597 * between sibling partitions.
599 if ((!capable(CAP_SYS_RAWIO
)) || (bdev
!= bdev
->bd_contains
))
602 idata
= mmc_blk_ioctl_copy_from_user(ic_ptr
);
604 return PTR_ERR(idata
);
606 md
= mmc_blk_get(bdev
->bd_disk
);
612 card
= md
->queue
.card
;
620 ioc_err
= __mmc_blk_ioctl_cmd(card
, md
, idata
);
622 /* Always switch back to main area after RPMB access */
623 if (md
->area_type
& MMC_BLK_DATA_AREA_RPMB
)
624 mmc_blk_part_switch(card
, dev_get_drvdata(&card
->dev
));
628 err
= mmc_blk_ioctl_copy_to_user(ic_ptr
, idata
);
635 return ioc_err
? ioc_err
: err
;
638 static int mmc_blk_ioctl_multi_cmd(struct block_device
*bdev
,
639 struct mmc_ioc_multi_cmd __user
*user
)
641 struct mmc_blk_ioc_data
**idata
= NULL
;
642 struct mmc_ioc_cmd __user
*cmds
= user
->cmds
;
643 struct mmc_card
*card
;
644 struct mmc_blk_data
*md
;
645 int i
, err
= 0, ioc_err
= 0;
649 * The caller must have CAP_SYS_RAWIO, and must be calling this on the
650 * whole block device, not on a partition. This prevents overspray
651 * between sibling partitions.
653 if ((!capable(CAP_SYS_RAWIO
)) || (bdev
!= bdev
->bd_contains
))
656 if (copy_from_user(&num_of_cmds
, &user
->num_of_cmds
,
657 sizeof(num_of_cmds
)))
660 if (num_of_cmds
> MMC_IOC_MAX_CMDS
)
663 idata
= kcalloc(num_of_cmds
, sizeof(*idata
), GFP_KERNEL
);
667 for (i
= 0; i
< num_of_cmds
; i
++) {
668 idata
[i
] = mmc_blk_ioctl_copy_from_user(&cmds
[i
]);
669 if (IS_ERR(idata
[i
])) {
670 err
= PTR_ERR(idata
[i
]);
676 md
= mmc_blk_get(bdev
->bd_disk
);
682 card
= md
->queue
.card
;
690 for (i
= 0; i
< num_of_cmds
&& !ioc_err
; i
++)
691 ioc_err
= __mmc_blk_ioctl_cmd(card
, md
, idata
[i
]);
693 /* Always switch back to main area after RPMB access */
694 if (md
->area_type
& MMC_BLK_DATA_AREA_RPMB
)
695 mmc_blk_part_switch(card
, dev_get_drvdata(&card
->dev
));
699 /* copy to user if data and response */
700 for (i
= 0; i
< num_of_cmds
&& !err
; i
++)
701 err
= mmc_blk_ioctl_copy_to_user(&cmds
[i
], idata
[i
]);
706 for (i
= 0; i
< num_of_cmds
; i
++) {
707 kfree(idata
[i
]->buf
);
711 return ioc_err
? ioc_err
: err
;
714 static int mmc_blk_ioctl(struct block_device
*bdev
, fmode_t mode
,
715 unsigned int cmd
, unsigned long arg
)
719 return mmc_blk_ioctl_cmd(bdev
,
720 (struct mmc_ioc_cmd __user
*)arg
);
721 case MMC_IOC_MULTI_CMD
:
722 return mmc_blk_ioctl_multi_cmd(bdev
,
723 (struct mmc_ioc_multi_cmd __user
*)arg
);
730 static int mmc_blk_compat_ioctl(struct block_device
*bdev
, fmode_t mode
,
731 unsigned int cmd
, unsigned long arg
)
733 return mmc_blk_ioctl(bdev
, mode
, cmd
, (unsigned long) compat_ptr(arg
));
737 static const struct block_device_operations mmc_bdops
= {
738 .open
= mmc_blk_open
,
739 .release
= mmc_blk_release
,
740 .getgeo
= mmc_blk_getgeo
,
741 .owner
= THIS_MODULE
,
742 .ioctl
= mmc_blk_ioctl
,
744 .compat_ioctl
= mmc_blk_compat_ioctl
,
748 static inline int mmc_blk_part_switch(struct mmc_card
*card
,
749 struct mmc_blk_data
*md
)
752 struct mmc_blk_data
*main_md
= dev_get_drvdata(&card
->dev
);
754 if (main_md
->part_curr
== md
->part_type
)
757 if (mmc_card_mmc(card
)) {
758 u8 part_config
= card
->ext_csd
.part_config
;
760 if (md
->part_type
== EXT_CSD_PART_CONFIG_ACC_RPMB
)
761 mmc_retune_pause(card
->host
);
763 part_config
&= ~EXT_CSD_PART_CONFIG_ACC_MASK
;
764 part_config
|= md
->part_type
;
766 ret
= mmc_switch(card
, EXT_CSD_CMD_SET_NORMAL
,
767 EXT_CSD_PART_CONFIG
, part_config
,
768 card
->ext_csd
.part_time
);
770 if (md
->part_type
== EXT_CSD_PART_CONFIG_ACC_RPMB
)
771 mmc_retune_unpause(card
->host
);
775 card
->ext_csd
.part_config
= part_config
;
777 if (main_md
->part_curr
== EXT_CSD_PART_CONFIG_ACC_RPMB
)
778 mmc_retune_unpause(card
->host
);
781 main_md
->part_curr
= md
->part_type
;
785 static u32
mmc_sd_num_wr_blocks(struct mmc_card
*card
)
791 struct mmc_request mrq
= {NULL
};
792 struct mmc_command cmd
= {0};
793 struct mmc_data data
= {0};
795 struct scatterlist sg
;
797 cmd
.opcode
= MMC_APP_CMD
;
798 cmd
.arg
= card
->rca
<< 16;
799 cmd
.flags
= MMC_RSP_SPI_R1
| MMC_RSP_R1
| MMC_CMD_AC
;
801 err
= mmc_wait_for_cmd(card
->host
, &cmd
, 0);
804 if (!mmc_host_is_spi(card
->host
) && !(cmd
.resp
[0] & R1_APP_CMD
))
807 memset(&cmd
, 0, sizeof(struct mmc_command
));
809 cmd
.opcode
= SD_APP_SEND_NUM_WR_BLKS
;
811 cmd
.flags
= MMC_RSP_SPI_R1
| MMC_RSP_R1
| MMC_CMD_ADTC
;
815 data
.flags
= MMC_DATA_READ
;
818 mmc_set_data_timeout(&data
, card
);
823 blocks
= kmalloc(4, GFP_KERNEL
);
827 sg_init_one(&sg
, blocks
, 4);
829 mmc_wait_for_req(card
->host
, &mrq
);
831 result
= ntohl(*blocks
);
834 if (cmd
.error
|| data
.error
)
840 static int get_card_status(struct mmc_card
*card
, u32
*status
, int retries
)
842 struct mmc_command cmd
= {0};
845 cmd
.opcode
= MMC_SEND_STATUS
;
846 if (!mmc_host_is_spi(card
->host
))
847 cmd
.arg
= card
->rca
<< 16;
848 cmd
.flags
= MMC_RSP_SPI_R2
| MMC_RSP_R1
| MMC_CMD_AC
;
849 err
= mmc_wait_for_cmd(card
->host
, &cmd
, retries
);
851 *status
= cmd
.resp
[0];
855 static int card_busy_detect(struct mmc_card
*card
, unsigned int timeout_ms
,
856 bool hw_busy_detect
, struct request
*req
, int *gen_err
)
858 unsigned long timeout
= jiffies
+ msecs_to_jiffies(timeout_ms
);
863 err
= get_card_status(card
, &status
, 5);
865 pr_err("%s: error %d requesting status\n",
866 req
->rq_disk
->disk_name
, err
);
870 if (status
& R1_ERROR
) {
871 pr_err("%s: %s: error sending status cmd, status %#x\n",
872 req
->rq_disk
->disk_name
, __func__
, status
);
876 /* We may rely on the host hw to handle busy detection.*/
877 if ((card
->host
->caps
& MMC_CAP_WAIT_WHILE_BUSY
) &&
882 * Timeout if the device never becomes ready for data and never
883 * leaves the program state.
885 if (time_after(jiffies
, timeout
)) {
886 pr_err("%s: Card stuck in programming state! %s %s\n",
887 mmc_hostname(card
->host
),
888 req
->rq_disk
->disk_name
, __func__
);
893 * Some cards mishandle the status bits,
894 * so make sure to check both the busy
895 * indication and the card state.
897 } while (!(status
& R1_READY_FOR_DATA
) ||
898 (R1_CURRENT_STATE(status
) == R1_STATE_PRG
));
903 static int send_stop(struct mmc_card
*card
, unsigned int timeout_ms
,
904 struct request
*req
, int *gen_err
, u32
*stop_status
)
906 struct mmc_host
*host
= card
->host
;
907 struct mmc_command cmd
= {0};
909 bool use_r1b_resp
= rq_data_dir(req
) == WRITE
;
912 * Normally we use R1B responses for WRITE, but in cases where the host
913 * has specified a max_busy_timeout we need to validate it. A failure
914 * means we need to prevent the host from doing hw busy detection, which
915 * is done by converting to a R1 response instead.
917 if (host
->max_busy_timeout
&& (timeout_ms
> host
->max_busy_timeout
))
918 use_r1b_resp
= false;
920 cmd
.opcode
= MMC_STOP_TRANSMISSION
;
922 cmd
.flags
= MMC_RSP_SPI_R1B
| MMC_RSP_R1B
| MMC_CMD_AC
;
923 cmd
.busy_timeout
= timeout_ms
;
925 cmd
.flags
= MMC_RSP_SPI_R1
| MMC_RSP_R1
| MMC_CMD_AC
;
928 err
= mmc_wait_for_cmd(host
, &cmd
, 5);
932 *stop_status
= cmd
.resp
[0];
934 /* No need to check card status in case of READ. */
935 if (rq_data_dir(req
) == READ
)
938 if (!mmc_host_is_spi(host
) &&
939 (*stop_status
& R1_ERROR
)) {
940 pr_err("%s: %s: general error sending stop command, resp %#x\n",
941 req
->rq_disk
->disk_name
, __func__
, *stop_status
);
945 return card_busy_detect(card
, timeout_ms
, use_r1b_resp
, req
, gen_err
);
948 #define ERR_NOMEDIUM 3
951 #define ERR_CONTINUE 0
953 static int mmc_blk_cmd_error(struct request
*req
, const char *name
, int error
,
954 bool status_valid
, u32 status
)
958 /* response crc error, retry the r/w cmd */
959 pr_err("%s: %s sending %s command, card status %#x\n",
960 req
->rq_disk
->disk_name
, "response CRC error",
965 pr_err("%s: %s sending %s command, card status %#x\n",
966 req
->rq_disk
->disk_name
, "timed out", name
, status
);
968 /* If the status cmd initially failed, retry the r/w cmd */
970 pr_err("%s: status not valid, retrying timeout\n",
971 req
->rq_disk
->disk_name
);
976 * If it was a r/w cmd crc error, or illegal command
977 * (eg, issued in wrong state) then retry - we should
978 * have corrected the state problem above.
980 if (status
& (R1_COM_CRC_ERROR
| R1_ILLEGAL_COMMAND
)) {
981 pr_err("%s: command error, retrying timeout\n",
982 req
->rq_disk
->disk_name
);
986 /* Otherwise abort the command */
990 /* We don't understand the error code the driver gave us */
991 pr_err("%s: unknown error %d sending read/write command, card status %#x\n",
992 req
->rq_disk
->disk_name
, error
, status
);
998 * Initial r/w and stop cmd error recovery.
999 * We don't know whether the card received the r/w cmd or not, so try to
1000 * restore things back to a sane state. Essentially, we do this as follows:
1001 * - Obtain card status. If the first attempt to obtain card status fails,
1002 * the status word will reflect the failed status cmd, not the failed
1003 * r/w cmd. If we fail to obtain card status, it suggests we can no
1004 * longer communicate with the card.
1005 * - Check the card state. If the card received the cmd but there was a
1006 * transient problem with the response, it might still be in a data transfer
1007 * mode. Try to send it a stop command. If this fails, we can't recover.
1008 * - If the r/w cmd failed due to a response CRC error, it was probably
1009 * transient, so retry the cmd.
1010 * - If the r/w cmd timed out, but we didn't get the r/w cmd status, retry.
1011 * - If the r/w cmd timed out, and the r/w cmd failed due to CRC error or
1012 * illegal cmd, retry.
1013 * Otherwise we don't understand what happened, so abort.
1015 static int mmc_blk_cmd_recovery(struct mmc_card
*card
, struct request
*req
,
1016 struct mmc_blk_request
*brq
, int *ecc_err
, int *gen_err
)
1018 bool prev_cmd_status_valid
= true;
1019 u32 status
, stop_status
= 0;
1022 if (mmc_card_removed(card
))
1023 return ERR_NOMEDIUM
;
1026 * Try to get card status which indicates both the card state
1027 * and why there was no response. If the first attempt fails,
1028 * we can't be sure the returned status is for the r/w command.
1030 for (retry
= 2; retry
>= 0; retry
--) {
1031 err
= get_card_status(card
, &status
, 0);
1035 /* Re-tune if needed */
1036 mmc_retune_recheck(card
->host
);
1038 prev_cmd_status_valid
= false;
1039 pr_err("%s: error %d sending status command, %sing\n",
1040 req
->rq_disk
->disk_name
, err
, retry
? "retry" : "abort");
1043 /* We couldn't get a response from the card. Give up. */
1045 /* Check if the card is removed */
1046 if (mmc_detect_card_removed(card
->host
))
1047 return ERR_NOMEDIUM
;
1051 /* Flag ECC errors */
1052 if ((status
& R1_CARD_ECC_FAILED
) ||
1053 (brq
->stop
.resp
[0] & R1_CARD_ECC_FAILED
) ||
1054 (brq
->cmd
.resp
[0] & R1_CARD_ECC_FAILED
))
1057 /* Flag General errors */
1058 if (!mmc_host_is_spi(card
->host
) && rq_data_dir(req
) != READ
)
1059 if ((status
& R1_ERROR
) ||
1060 (brq
->stop
.resp
[0] & R1_ERROR
)) {
1061 pr_err("%s: %s: general error sending stop or status command, stop cmd response %#x, card status %#x\n",
1062 req
->rq_disk
->disk_name
, __func__
,
1063 brq
->stop
.resp
[0], status
);
1068 * Check the current card state. If it is in some data transfer
1069 * mode, tell it to stop (and hopefully transition back to TRAN.)
1071 if (R1_CURRENT_STATE(status
) == R1_STATE_DATA
||
1072 R1_CURRENT_STATE(status
) == R1_STATE_RCV
) {
1073 err
= send_stop(card
,
1074 DIV_ROUND_UP(brq
->data
.timeout_ns
, 1000000),
1075 req
, gen_err
, &stop_status
);
1077 pr_err("%s: error %d sending stop command\n",
1078 req
->rq_disk
->disk_name
, err
);
1080 * If the stop cmd also timed out, the card is probably
1081 * not present, so abort. Other errors are bad news too.
1086 if (stop_status
& R1_CARD_ECC_FAILED
)
1090 /* Check for set block count errors */
1092 return mmc_blk_cmd_error(req
, "SET_BLOCK_COUNT", brq
->sbc
.error
,
1093 prev_cmd_status_valid
, status
);
1095 /* Check for r/w command errors */
1097 return mmc_blk_cmd_error(req
, "r/w cmd", brq
->cmd
.error
,
1098 prev_cmd_status_valid
, status
);
1101 if (!brq
->stop
.error
)
1102 return ERR_CONTINUE
;
1104 /* Now for stop errors. These aren't fatal to the transfer. */
1105 pr_info("%s: error %d sending stop command, original cmd response %#x, card status %#x\n",
1106 req
->rq_disk
->disk_name
, brq
->stop
.error
,
1107 brq
->cmd
.resp
[0], status
);
1110 * Subsitute in our own stop status as this will give the error
1111 * state which happened during the execution of the r/w command.
1114 brq
->stop
.resp
[0] = stop_status
;
1115 brq
->stop
.error
= 0;
1117 return ERR_CONTINUE
;
1120 static int mmc_blk_reset(struct mmc_blk_data
*md
, struct mmc_host
*host
,
1125 if (md
->reset_done
& type
)
1128 md
->reset_done
|= type
;
1129 err
= mmc_hw_reset(host
);
1130 /* Ensure we switch back to the correct partition */
1131 if (err
!= -EOPNOTSUPP
) {
1132 struct mmc_blk_data
*main_md
=
1133 dev_get_drvdata(&host
->card
->dev
);
1136 main_md
->part_curr
= main_md
->part_type
;
1137 part_err
= mmc_blk_part_switch(host
->card
, md
);
1140 * We have failed to get back into the correct
1141 * partition, so we need to abort the whole request.
1149 static inline void mmc_blk_reset_success(struct mmc_blk_data
*md
, int type
)
1151 md
->reset_done
&= ~type
;
1154 int mmc_access_rpmb(struct mmc_queue
*mq
)
1156 struct mmc_blk_data
*md
= mq
->data
;
1158 * If this is a RPMB partition access, return ture
1160 if (md
&& md
->part_type
== EXT_CSD_PART_CONFIG_ACC_RPMB
)
1166 static int mmc_blk_issue_discard_rq(struct mmc_queue
*mq
, struct request
*req
)
1168 struct mmc_blk_data
*md
= mq
->data
;
1169 struct mmc_card
*card
= md
->queue
.card
;
1170 unsigned int from
, nr
, arg
;
1171 int err
= 0, type
= MMC_BLK_DISCARD
;
1173 if (!mmc_can_erase(card
)) {
1178 from
= blk_rq_pos(req
);
1179 nr
= blk_rq_sectors(req
);
1181 if (mmc_can_discard(card
))
1182 arg
= MMC_DISCARD_ARG
;
1183 else if (mmc_can_trim(card
))
1186 arg
= MMC_ERASE_ARG
;
1188 if (card
->quirks
& MMC_QUIRK_INAND_CMD38
) {
1189 err
= mmc_switch(card
, EXT_CSD_CMD_SET_NORMAL
,
1190 INAND_CMD38_ARG_EXT_CSD
,
1191 arg
== MMC_TRIM_ARG
?
1192 INAND_CMD38_ARG_TRIM
:
1193 INAND_CMD38_ARG_ERASE
,
1198 err
= mmc_erase(card
, from
, nr
, arg
);
1200 if (err
== -EIO
&& !mmc_blk_reset(md
, card
->host
, type
))
1203 mmc_blk_reset_success(md
, type
);
1204 blk_end_request(req
, err
, blk_rq_bytes(req
));
1209 static int mmc_blk_issue_secdiscard_rq(struct mmc_queue
*mq
,
1210 struct request
*req
)
1212 struct mmc_blk_data
*md
= mq
->data
;
1213 struct mmc_card
*card
= md
->queue
.card
;
1214 unsigned int from
, nr
, arg
;
1215 int err
= 0, type
= MMC_BLK_SECDISCARD
;
1217 if (!(mmc_can_secure_erase_trim(card
))) {
1222 from
= blk_rq_pos(req
);
1223 nr
= blk_rq_sectors(req
);
1225 if (mmc_can_trim(card
) && !mmc_erase_group_aligned(card
, from
, nr
))
1226 arg
= MMC_SECURE_TRIM1_ARG
;
1228 arg
= MMC_SECURE_ERASE_ARG
;
1231 if (card
->quirks
& MMC_QUIRK_INAND_CMD38
) {
1232 err
= mmc_switch(card
, EXT_CSD_CMD_SET_NORMAL
,
1233 INAND_CMD38_ARG_EXT_CSD
,
1234 arg
== MMC_SECURE_TRIM1_ARG
?
1235 INAND_CMD38_ARG_SECTRIM1
:
1236 INAND_CMD38_ARG_SECERASE
,
1242 err
= mmc_erase(card
, from
, nr
, arg
);
1248 if (arg
== MMC_SECURE_TRIM1_ARG
) {
1249 if (card
->quirks
& MMC_QUIRK_INAND_CMD38
) {
1250 err
= mmc_switch(card
, EXT_CSD_CMD_SET_NORMAL
,
1251 INAND_CMD38_ARG_EXT_CSD
,
1252 INAND_CMD38_ARG_SECTRIM2
,
1258 err
= mmc_erase(card
, from
, nr
, MMC_SECURE_TRIM2_ARG
);
1266 if (err
&& !mmc_blk_reset(md
, card
->host
, type
))
1269 mmc_blk_reset_success(md
, type
);
1271 blk_end_request(req
, err
, blk_rq_bytes(req
));
1276 static int mmc_blk_issue_flush(struct mmc_queue
*mq
, struct request
*req
)
1278 struct mmc_blk_data
*md
= mq
->data
;
1279 struct mmc_card
*card
= md
->queue
.card
;
1282 ret
= mmc_flush_cache(card
);
1286 blk_end_request_all(req
, ret
);
1292 * Reformat current write as a reliable write, supporting
1293 * both legacy and the enhanced reliable write MMC cards.
1294 * In each transfer we'll handle only as much as a single
1295 * reliable write can handle, thus finish the request in
1296 * partial completions.
1298 static inline void mmc_apply_rel_rw(struct mmc_blk_request
*brq
,
1299 struct mmc_card
*card
,
1300 struct request
*req
)
1302 if (!(card
->ext_csd
.rel_param
& EXT_CSD_WR_REL_PARAM_EN
)) {
1303 /* Legacy mode imposes restrictions on transfers. */
1304 if (!IS_ALIGNED(brq
->cmd
.arg
, card
->ext_csd
.rel_sectors
))
1305 brq
->data
.blocks
= 1;
1307 if (brq
->data
.blocks
> card
->ext_csd
.rel_sectors
)
1308 brq
->data
.blocks
= card
->ext_csd
.rel_sectors
;
1309 else if (brq
->data
.blocks
< card
->ext_csd
.rel_sectors
)
1310 brq
->data
.blocks
= 1;
1314 #define CMD_ERRORS \
1315 (R1_OUT_OF_RANGE | /* Command argument out of range */ \
1316 R1_ADDRESS_ERROR | /* Misaligned address */ \
1317 R1_BLOCK_LEN_ERROR | /* Transferred block length incorrect */\
1318 R1_WP_VIOLATION | /* Tried to write to protected block */ \
1319 R1_CC_ERROR | /* Card controller error */ \
1320 R1_ERROR) /* General/unknown error */
1322 static int mmc_blk_err_check(struct mmc_card
*card
,
1323 struct mmc_async_req
*areq
)
1325 struct mmc_queue_req
*mq_mrq
= container_of(areq
, struct mmc_queue_req
,
1327 struct mmc_blk_request
*brq
= &mq_mrq
->brq
;
1328 struct request
*req
= mq_mrq
->req
;
1329 int need_retune
= card
->host
->need_retune
;
1330 int ecc_err
= 0, gen_err
= 0;
1333 * sbc.error indicates a problem with the set block count
1334 * command. No data will have been transferred.
1336 * cmd.error indicates a problem with the r/w command. No
1337 * data will have been transferred.
1339 * stop.error indicates a problem with the stop command. Data
1340 * may have been transferred, or may still be transferring.
1342 if (brq
->sbc
.error
|| brq
->cmd
.error
|| brq
->stop
.error
||
1344 switch (mmc_blk_cmd_recovery(card
, req
, brq
, &ecc_err
, &gen_err
)) {
1346 return MMC_BLK_RETRY
;
1348 return MMC_BLK_ABORT
;
1350 return MMC_BLK_NOMEDIUM
;
1357 * Check for errors relating to the execution of the
1358 * initial command - such as address errors. No data
1359 * has been transferred.
1361 if (brq
->cmd
.resp
[0] & CMD_ERRORS
) {
1362 pr_err("%s: r/w command failed, status = %#x\n",
1363 req
->rq_disk
->disk_name
, brq
->cmd
.resp
[0]);
1364 return MMC_BLK_ABORT
;
1368 * Everything else is either success, or a data error of some
1369 * kind. If it was a write, we may have transitioned to
1370 * program mode, which we have to wait for it to complete.
1372 if (!mmc_host_is_spi(card
->host
) && rq_data_dir(req
) != READ
) {
1375 /* Check stop command response */
1376 if (brq
->stop
.resp
[0] & R1_ERROR
) {
1377 pr_err("%s: %s: general error sending stop command, stop cmd response %#x\n",
1378 req
->rq_disk
->disk_name
, __func__
,
1383 err
= card_busy_detect(card
, MMC_BLK_TIMEOUT_MS
, false, req
,
1386 return MMC_BLK_CMD_ERR
;
1389 /* if general error occurs, retry the write operation. */
1391 pr_warn("%s: retrying write for general error\n",
1392 req
->rq_disk
->disk_name
);
1393 return MMC_BLK_RETRY
;
1396 if (brq
->data
.error
) {
1397 if (need_retune
&& !brq
->retune_retry_done
) {
1398 pr_debug("%s: retrying because a re-tune was needed\n",
1399 req
->rq_disk
->disk_name
);
1400 brq
->retune_retry_done
= 1;
1401 return MMC_BLK_RETRY
;
1403 pr_err("%s: error %d transferring data, sector %u, nr %u, cmd response %#x, card status %#x\n",
1404 req
->rq_disk
->disk_name
, brq
->data
.error
,
1405 (unsigned)blk_rq_pos(req
),
1406 (unsigned)blk_rq_sectors(req
),
1407 brq
->cmd
.resp
[0], brq
->stop
.resp
[0]);
1409 if (rq_data_dir(req
) == READ
) {
1411 return MMC_BLK_ECC_ERR
;
1412 return MMC_BLK_DATA_ERR
;
1414 return MMC_BLK_CMD_ERR
;
1418 if (!brq
->data
.bytes_xfered
)
1419 return MMC_BLK_RETRY
;
1421 if (mmc_packed_cmd(mq_mrq
->cmd_type
)) {
1422 if (unlikely(brq
->data
.blocks
<< 9 != brq
->data
.bytes_xfered
))
1423 return MMC_BLK_PARTIAL
;
1425 return MMC_BLK_SUCCESS
;
1428 if (blk_rq_bytes(req
) != brq
->data
.bytes_xfered
)
1429 return MMC_BLK_PARTIAL
;
1431 return MMC_BLK_SUCCESS
;
1434 static int mmc_blk_packed_err_check(struct mmc_card
*card
,
1435 struct mmc_async_req
*areq
)
1437 struct mmc_queue_req
*mq_rq
= container_of(areq
, struct mmc_queue_req
,
1439 struct request
*req
= mq_rq
->req
;
1440 struct mmc_packed
*packed
= mq_rq
->packed
;
1441 int err
, check
, status
;
1445 check
= mmc_blk_err_check(card
, areq
);
1446 err
= get_card_status(card
, &status
, 0);
1448 pr_err("%s: error %d sending status command\n",
1449 req
->rq_disk
->disk_name
, err
);
1450 return MMC_BLK_ABORT
;
1453 if (status
& R1_EXCEPTION_EVENT
) {
1454 err
= mmc_get_ext_csd(card
, &ext_csd
);
1456 pr_err("%s: error %d sending ext_csd\n",
1457 req
->rq_disk
->disk_name
, err
);
1458 return MMC_BLK_ABORT
;
1461 if ((ext_csd
[EXT_CSD_EXP_EVENTS_STATUS
] &
1462 EXT_CSD_PACKED_FAILURE
) &&
1463 (ext_csd
[EXT_CSD_PACKED_CMD_STATUS
] &
1464 EXT_CSD_PACKED_GENERIC_ERROR
)) {
1465 if (ext_csd
[EXT_CSD_PACKED_CMD_STATUS
] &
1466 EXT_CSD_PACKED_INDEXED_ERROR
) {
1467 packed
->idx_failure
=
1468 ext_csd
[EXT_CSD_PACKED_FAILURE_INDEX
] - 1;
1469 check
= MMC_BLK_PARTIAL
;
1471 pr_err("%s: packed cmd failed, nr %u, sectors %u, "
1472 "failure index: %d\n",
1473 req
->rq_disk
->disk_name
, packed
->nr_entries
,
1474 packed
->blocks
, packed
->idx_failure
);
1482 static void mmc_blk_rw_rq_prep(struct mmc_queue_req
*mqrq
,
1483 struct mmc_card
*card
,
1485 struct mmc_queue
*mq
)
1487 u32 readcmd
, writecmd
;
1488 struct mmc_blk_request
*brq
= &mqrq
->brq
;
1489 struct request
*req
= mqrq
->req
;
1490 struct mmc_blk_data
*md
= mq
->data
;
1494 * Reliable writes are used to implement Forced Unit Access and
1495 * are supported only on MMCs.
1497 bool do_rel_wr
= (req
->cmd_flags
& REQ_FUA
) &&
1498 (rq_data_dir(req
) == WRITE
) &&
1499 (md
->flags
& MMC_BLK_REL_WR
);
1501 memset(brq
, 0, sizeof(struct mmc_blk_request
));
1502 brq
->mrq
.cmd
= &brq
->cmd
;
1503 brq
->mrq
.data
= &brq
->data
;
1505 brq
->cmd
.arg
= blk_rq_pos(req
);
1506 if (!mmc_card_blockaddr(card
))
1508 brq
->cmd
.flags
= MMC_RSP_SPI_R1
| MMC_RSP_R1
| MMC_CMD_ADTC
;
1509 brq
->data
.blksz
= 512;
1510 brq
->stop
.opcode
= MMC_STOP_TRANSMISSION
;
1512 brq
->data
.blocks
= blk_rq_sectors(req
);
1515 * The block layer doesn't support all sector count
1516 * restrictions, so we need to be prepared for too big
1519 if (brq
->data
.blocks
> card
->host
->max_blk_count
)
1520 brq
->data
.blocks
= card
->host
->max_blk_count
;
1522 if (brq
->data
.blocks
> 1) {
1524 * After a read error, we redo the request one sector
1525 * at a time in order to accurately determine which
1526 * sectors can be read successfully.
1529 brq
->data
.blocks
= 1;
1532 * Some controllers have HW issues while operating
1533 * in multiple I/O mode
1535 if (card
->host
->ops
->multi_io_quirk
)
1536 brq
->data
.blocks
= card
->host
->ops
->multi_io_quirk(card
,
1537 (rq_data_dir(req
) == READ
) ?
1538 MMC_DATA_READ
: MMC_DATA_WRITE
,
1542 if (brq
->data
.blocks
> 1 || do_rel_wr
) {
1543 /* SPI multiblock writes terminate using a special
1544 * token, not a STOP_TRANSMISSION request.
1546 if (!mmc_host_is_spi(card
->host
) ||
1547 rq_data_dir(req
) == READ
)
1548 brq
->mrq
.stop
= &brq
->stop
;
1549 readcmd
= MMC_READ_MULTIPLE_BLOCK
;
1550 writecmd
= MMC_WRITE_MULTIPLE_BLOCK
;
1552 brq
->mrq
.stop
= NULL
;
1553 readcmd
= MMC_READ_SINGLE_BLOCK
;
1554 writecmd
= MMC_WRITE_BLOCK
;
1556 if (rq_data_dir(req
) == READ
) {
1557 brq
->cmd
.opcode
= readcmd
;
1558 brq
->data
.flags
= MMC_DATA_READ
;
1560 brq
->stop
.flags
= MMC_RSP_SPI_R1
| MMC_RSP_R1
|
1563 brq
->cmd
.opcode
= writecmd
;
1564 brq
->data
.flags
= MMC_DATA_WRITE
;
1566 brq
->stop
.flags
= MMC_RSP_SPI_R1B
| MMC_RSP_R1B
|
1571 mmc_apply_rel_rw(brq
, card
, req
);
1574 * Data tag is used only during writing meta data to speed
1575 * up write and any subsequent read of this meta data
1577 do_data_tag
= (card
->ext_csd
.data_tag_unit_size
) &&
1578 (req
->cmd_flags
& REQ_META
) &&
1579 (rq_data_dir(req
) == WRITE
) &&
1580 ((brq
->data
.blocks
* brq
->data
.blksz
) >=
1581 card
->ext_csd
.data_tag_unit_size
);
1584 * Pre-defined multi-block transfers are preferable to
1585 * open ended-ones (and necessary for reliable writes).
1586 * However, it is not sufficient to just send CMD23,
1587 * and avoid the final CMD12, as on an error condition
1588 * CMD12 (stop) needs to be sent anyway. This, coupled
1589 * with Auto-CMD23 enhancements provided by some
1590 * hosts, means that the complexity of dealing
1591 * with this is best left to the host. If CMD23 is
1592 * supported by card and host, we'll fill sbc in and let
1593 * the host deal with handling it correctly. This means
1594 * that for hosts that don't expose MMC_CAP_CMD23, no
1595 * change of behavior will be observed.
1597 * N.B: Some MMC cards experience perf degradation.
1598 * We'll avoid using CMD23-bounded multiblock writes for
1599 * these, while retaining features like reliable writes.
1601 if ((md
->flags
& MMC_BLK_CMD23
) && mmc_op_multi(brq
->cmd
.opcode
) &&
1602 (do_rel_wr
|| !(card
->quirks
& MMC_QUIRK_BLK_NO_CMD23
) ||
1604 brq
->sbc
.opcode
= MMC_SET_BLOCK_COUNT
;
1605 brq
->sbc
.arg
= brq
->data
.blocks
|
1606 (do_rel_wr
? (1 << 31) : 0) |
1607 (do_data_tag
? (1 << 29) : 0);
1608 brq
->sbc
.flags
= MMC_RSP_R1
| MMC_CMD_AC
;
1609 brq
->mrq
.sbc
= &brq
->sbc
;
1612 mmc_set_data_timeout(&brq
->data
, card
);
1614 brq
->data
.sg
= mqrq
->sg
;
1615 brq
->data
.sg_len
= mmc_queue_map_sg(mq
, mqrq
);
1618 * Adjust the sg list so it is the same size as the
1621 if (brq
->data
.blocks
!= blk_rq_sectors(req
)) {
1622 int i
, data_size
= brq
->data
.blocks
<< 9;
1623 struct scatterlist
*sg
;
1625 for_each_sg(brq
->data
.sg
, sg
, brq
->data
.sg_len
, i
) {
1626 data_size
-= sg
->length
;
1627 if (data_size
<= 0) {
1628 sg
->length
+= data_size
;
1633 brq
->data
.sg_len
= i
;
1636 mqrq
->mmc_active
.mrq
= &brq
->mrq
;
1637 mqrq
->mmc_active
.err_check
= mmc_blk_err_check
;
1639 mmc_queue_bounce_pre(mqrq
);
1642 static inline u8
mmc_calc_packed_hdr_segs(struct request_queue
*q
,
1643 struct mmc_card
*card
)
1645 unsigned int hdr_sz
= mmc_large_sector(card
) ? 4096 : 512;
1646 unsigned int max_seg_sz
= queue_max_segment_size(q
);
1647 unsigned int len
, nr_segs
= 0;
1650 len
= min(hdr_sz
, max_seg_sz
);
1658 static u8
mmc_blk_prep_packed_list(struct mmc_queue
*mq
, struct request
*req
)
1660 struct request_queue
*q
= mq
->queue
;
1661 struct mmc_card
*card
= mq
->card
;
1662 struct request
*cur
= req
, *next
= NULL
;
1663 struct mmc_blk_data
*md
= mq
->data
;
1664 struct mmc_queue_req
*mqrq
= mq
->mqrq_cur
;
1665 bool en_rel_wr
= card
->ext_csd
.rel_param
& EXT_CSD_WR_REL_PARAM_EN
;
1666 unsigned int req_sectors
= 0, phys_segments
= 0;
1667 unsigned int max_blk_count
, max_phys_segs
;
1668 bool put_back
= true;
1669 u8 max_packed_rw
= 0;
1673 * We don't need to check packed for any further
1674 * operation of packed stuff as we set MMC_PACKED_NONE
1675 * and return zero for reqs if geting null packed. Also
1676 * we clean the flag of MMC_BLK_PACKED_CMD to avoid doing
1677 * it again when removing blk req.
1679 if (!mqrq
->packed
) {
1680 md
->flags
&= (~MMC_BLK_PACKED_CMD
);
1684 if (!(md
->flags
& MMC_BLK_PACKED_CMD
))
1687 if ((rq_data_dir(cur
) == WRITE
) &&
1688 mmc_host_packed_wr(card
->host
))
1689 max_packed_rw
= card
->ext_csd
.max_packed_writes
;
1691 if (max_packed_rw
== 0)
1694 if (mmc_req_rel_wr(cur
) &&
1695 (md
->flags
& MMC_BLK_REL_WR
) && !en_rel_wr
)
1698 if (mmc_large_sector(card
) &&
1699 !IS_ALIGNED(blk_rq_sectors(cur
), 8))
1702 mmc_blk_clear_packed(mqrq
);
1704 max_blk_count
= min(card
->host
->max_blk_count
,
1705 card
->host
->max_req_size
>> 9);
1706 if (unlikely(max_blk_count
> 0xffff))
1707 max_blk_count
= 0xffff;
1709 max_phys_segs
= queue_max_segments(q
);
1710 req_sectors
+= blk_rq_sectors(cur
);
1711 phys_segments
+= cur
->nr_phys_segments
;
1713 if (rq_data_dir(cur
) == WRITE
) {
1714 req_sectors
+= mmc_large_sector(card
) ? 8 : 1;
1715 phys_segments
+= mmc_calc_packed_hdr_segs(q
, card
);
1719 if (reqs
>= max_packed_rw
- 1) {
1724 spin_lock_irq(q
->queue_lock
);
1725 next
= blk_fetch_request(q
);
1726 spin_unlock_irq(q
->queue_lock
);
1732 if (mmc_large_sector(card
) &&
1733 !IS_ALIGNED(blk_rq_sectors(next
), 8))
1736 if (req_op(next
) == REQ_OP_DISCARD
||
1737 req_op(next
) == REQ_OP_SECURE_ERASE
||
1738 req_op(next
) == REQ_OP_FLUSH
)
1741 if (rq_data_dir(cur
) != rq_data_dir(next
))
1744 if (mmc_req_rel_wr(next
) &&
1745 (md
->flags
& MMC_BLK_REL_WR
) && !en_rel_wr
)
1748 req_sectors
+= blk_rq_sectors(next
);
1749 if (req_sectors
> max_blk_count
)
1752 phys_segments
+= next
->nr_phys_segments
;
1753 if (phys_segments
> max_phys_segs
)
1756 list_add_tail(&next
->queuelist
, &mqrq
->packed
->list
);
1762 spin_lock_irq(q
->queue_lock
);
1763 blk_requeue_request(q
, next
);
1764 spin_unlock_irq(q
->queue_lock
);
1768 list_add(&req
->queuelist
, &mqrq
->packed
->list
);
1769 mqrq
->packed
->nr_entries
= ++reqs
;
1770 mqrq
->packed
->retries
= reqs
;
1775 mqrq
->cmd_type
= MMC_PACKED_NONE
;
1779 static void mmc_blk_packed_hdr_wrq_prep(struct mmc_queue_req
*mqrq
,
1780 struct mmc_card
*card
,
1781 struct mmc_queue
*mq
)
1783 struct mmc_blk_request
*brq
= &mqrq
->brq
;
1784 struct request
*req
= mqrq
->req
;
1785 struct request
*prq
;
1786 struct mmc_blk_data
*md
= mq
->data
;
1787 struct mmc_packed
*packed
= mqrq
->packed
;
1788 bool do_rel_wr
, do_data_tag
;
1789 u32
*packed_cmd_hdr
;
1793 mqrq
->cmd_type
= MMC_PACKED_WRITE
;
1795 packed
->idx_failure
= MMC_PACKED_NR_IDX
;
1797 packed_cmd_hdr
= packed
->cmd_hdr
;
1798 memset(packed_cmd_hdr
, 0, sizeof(packed
->cmd_hdr
));
1799 packed_cmd_hdr
[0] = cpu_to_le32((packed
->nr_entries
<< 16) |
1800 (PACKED_CMD_WR
<< 8) | PACKED_CMD_VER
);
1801 hdr_blocks
= mmc_large_sector(card
) ? 8 : 1;
1804 * Argument for each entry of packed group
1806 list_for_each_entry(prq
, &packed
->list
, queuelist
) {
1807 do_rel_wr
= mmc_req_rel_wr(prq
) && (md
->flags
& MMC_BLK_REL_WR
);
1808 do_data_tag
= (card
->ext_csd
.data_tag_unit_size
) &&
1809 (prq
->cmd_flags
& REQ_META
) &&
1810 (rq_data_dir(prq
) == WRITE
) &&
1811 blk_rq_bytes(prq
) >= card
->ext_csd
.data_tag_unit_size
;
1812 /* Argument of CMD23 */
1813 packed_cmd_hdr
[(i
* 2)] = cpu_to_le32(
1814 (do_rel_wr
? MMC_CMD23_ARG_REL_WR
: 0) |
1815 (do_data_tag
? MMC_CMD23_ARG_TAG_REQ
: 0) |
1816 blk_rq_sectors(prq
));
1817 /* Argument of CMD18 or CMD25 */
1818 packed_cmd_hdr
[((i
* 2)) + 1] = cpu_to_le32(
1819 mmc_card_blockaddr(card
) ?
1820 blk_rq_pos(prq
) : blk_rq_pos(prq
) << 9);
1821 packed
->blocks
+= blk_rq_sectors(prq
);
1825 memset(brq
, 0, sizeof(struct mmc_blk_request
));
1826 brq
->mrq
.cmd
= &brq
->cmd
;
1827 brq
->mrq
.data
= &brq
->data
;
1828 brq
->mrq
.sbc
= &brq
->sbc
;
1829 brq
->mrq
.stop
= &brq
->stop
;
1831 brq
->sbc
.opcode
= MMC_SET_BLOCK_COUNT
;
1832 brq
->sbc
.arg
= MMC_CMD23_ARG_PACKED
| (packed
->blocks
+ hdr_blocks
);
1833 brq
->sbc
.flags
= MMC_RSP_R1
| MMC_CMD_AC
;
1835 brq
->cmd
.opcode
= MMC_WRITE_MULTIPLE_BLOCK
;
1836 brq
->cmd
.arg
= blk_rq_pos(req
);
1837 if (!mmc_card_blockaddr(card
))
1839 brq
->cmd
.flags
= MMC_RSP_SPI_R1
| MMC_RSP_R1
| MMC_CMD_ADTC
;
1841 brq
->data
.blksz
= 512;
1842 brq
->data
.blocks
= packed
->blocks
+ hdr_blocks
;
1843 brq
->data
.flags
= MMC_DATA_WRITE
;
1845 brq
->stop
.opcode
= MMC_STOP_TRANSMISSION
;
1847 brq
->stop
.flags
= MMC_RSP_SPI_R1B
| MMC_RSP_R1B
| MMC_CMD_AC
;
1849 mmc_set_data_timeout(&brq
->data
, card
);
1851 brq
->data
.sg
= mqrq
->sg
;
1852 brq
->data
.sg_len
= mmc_queue_map_sg(mq
, mqrq
);
1854 mqrq
->mmc_active
.mrq
= &brq
->mrq
;
1855 mqrq
->mmc_active
.err_check
= mmc_blk_packed_err_check
;
1857 mmc_queue_bounce_pre(mqrq
);
1860 static int mmc_blk_cmd_err(struct mmc_blk_data
*md
, struct mmc_card
*card
,
1861 struct mmc_blk_request
*brq
, struct request
*req
,
1864 struct mmc_queue_req
*mq_rq
;
1865 mq_rq
= container_of(brq
, struct mmc_queue_req
, brq
);
1868 * If this is an SD card and we're writing, we can first
1869 * mark the known good sectors as ok.
1871 * If the card is not SD, we can still ok written sectors
1872 * as reported by the controller (which might be less than
1873 * the real number of written sectors, but never more).
1875 if (mmc_card_sd(card
)) {
1878 blocks
= mmc_sd_num_wr_blocks(card
);
1879 if (blocks
!= (u32
)-1) {
1880 ret
= blk_end_request(req
, 0, blocks
<< 9);
1883 if (!mmc_packed_cmd(mq_rq
->cmd_type
))
1884 ret
= blk_end_request(req
, 0, brq
->data
.bytes_xfered
);
1889 static int mmc_blk_end_packed_req(struct mmc_queue_req
*mq_rq
)
1891 struct request
*prq
;
1892 struct mmc_packed
*packed
= mq_rq
->packed
;
1893 int idx
= packed
->idx_failure
, i
= 0;
1896 while (!list_empty(&packed
->list
)) {
1897 prq
= list_entry_rq(packed
->list
.next
);
1899 /* retry from error index */
1900 packed
->nr_entries
-= idx
;
1904 if (packed
->nr_entries
== MMC_PACKED_NR_SINGLE
) {
1905 list_del_init(&prq
->queuelist
);
1906 mmc_blk_clear_packed(mq_rq
);
1910 list_del_init(&prq
->queuelist
);
1911 blk_end_request(prq
, 0, blk_rq_bytes(prq
));
1915 mmc_blk_clear_packed(mq_rq
);
1919 static void mmc_blk_abort_packed_req(struct mmc_queue_req
*mq_rq
)
1921 struct request
*prq
;
1922 struct mmc_packed
*packed
= mq_rq
->packed
;
1924 while (!list_empty(&packed
->list
)) {
1925 prq
= list_entry_rq(packed
->list
.next
);
1926 list_del_init(&prq
->queuelist
);
1927 blk_end_request(prq
, -EIO
, blk_rq_bytes(prq
));
1930 mmc_blk_clear_packed(mq_rq
);
1933 static void mmc_blk_revert_packed_req(struct mmc_queue
*mq
,
1934 struct mmc_queue_req
*mq_rq
)
1936 struct request
*prq
;
1937 struct request_queue
*q
= mq
->queue
;
1938 struct mmc_packed
*packed
= mq_rq
->packed
;
1940 while (!list_empty(&packed
->list
)) {
1941 prq
= list_entry_rq(packed
->list
.prev
);
1942 if (prq
->queuelist
.prev
!= &packed
->list
) {
1943 list_del_init(&prq
->queuelist
);
1944 spin_lock_irq(q
->queue_lock
);
1945 blk_requeue_request(mq
->queue
, prq
);
1946 spin_unlock_irq(q
->queue_lock
);
1948 list_del_init(&prq
->queuelist
);
1952 mmc_blk_clear_packed(mq_rq
);
1955 static int mmc_blk_issue_rw_rq(struct mmc_queue
*mq
, struct request
*rqc
)
1957 struct mmc_blk_data
*md
= mq
->data
;
1958 struct mmc_card
*card
= md
->queue
.card
;
1959 struct mmc_blk_request
*brq
= &mq
->mqrq_cur
->brq
;
1960 int ret
= 1, disable_multi
= 0, retry
= 0, type
, retune_retry_done
= 0;
1961 enum mmc_blk_status status
;
1962 struct mmc_queue_req
*mq_rq
;
1963 struct request
*req
= rqc
;
1964 struct mmc_async_req
*areq
;
1965 const u8 packed_nr
= 2;
1968 if (!rqc
&& !mq
->mqrq_prev
->req
)
1972 reqs
= mmc_blk_prep_packed_list(mq
, rqc
);
1977 * When 4KB native sector is enabled, only 8 blocks
1978 * multiple read or write is allowed
1980 if (mmc_large_sector(card
) &&
1981 !IS_ALIGNED(blk_rq_sectors(rqc
), 8)) {
1982 pr_err("%s: Transfer size is not 4KB sector size aligned\n",
1983 req
->rq_disk
->disk_name
);
1984 mq_rq
= mq
->mqrq_cur
;
1988 if (reqs
>= packed_nr
)
1989 mmc_blk_packed_hdr_wrq_prep(mq
->mqrq_cur
,
1992 mmc_blk_rw_rq_prep(mq
->mqrq_cur
, card
, 0, mq
);
1993 areq
= &mq
->mqrq_cur
->mmc_active
;
1996 areq
= mmc_start_req(card
->host
, areq
, (int *) &status
);
1998 if (status
== MMC_BLK_NEW_REQUEST
)
1999 mq
->flags
|= MMC_QUEUE_NEW_REQUEST
;
2003 mq_rq
= container_of(areq
, struct mmc_queue_req
, mmc_active
);
2006 type
= rq_data_dir(req
) == READ
? MMC_BLK_READ
: MMC_BLK_WRITE
;
2007 mmc_queue_bounce_post(mq_rq
);
2010 case MMC_BLK_SUCCESS
:
2011 case MMC_BLK_PARTIAL
:
2013 * A block was successfully transferred.
2015 mmc_blk_reset_success(md
, type
);
2017 if (mmc_packed_cmd(mq_rq
->cmd_type
)) {
2018 ret
= mmc_blk_end_packed_req(mq_rq
);
2021 ret
= blk_end_request(req
, 0,
2022 brq
->data
.bytes_xfered
);
2026 * If the blk_end_request function returns non-zero even
2027 * though all data has been transferred and no errors
2028 * were returned by the host controller, it's a bug.
2030 if (status
== MMC_BLK_SUCCESS
&& ret
) {
2031 pr_err("%s BUG rq_tot %d d_xfer %d\n",
2032 __func__
, blk_rq_bytes(req
),
2033 brq
->data
.bytes_xfered
);
2038 case MMC_BLK_CMD_ERR
:
2039 ret
= mmc_blk_cmd_err(md
, card
, brq
, req
, ret
);
2040 if (mmc_blk_reset(md
, card
->host
, type
))
2046 retune_retry_done
= brq
->retune_retry_done
;
2051 if (!mmc_blk_reset(md
, card
->host
, type
))
2054 case MMC_BLK_DATA_ERR
: {
2057 err
= mmc_blk_reset(md
, card
->host
, type
);
2060 if (err
== -ENODEV
||
2061 mmc_packed_cmd(mq_rq
->cmd_type
))
2065 case MMC_BLK_ECC_ERR
:
2066 if (brq
->data
.blocks
> 1) {
2067 /* Redo read one sector at a time */
2068 pr_warn("%s: retrying using single block read\n",
2069 req
->rq_disk
->disk_name
);
2074 * After an error, we redo I/O one sector at a
2075 * time, so we only reach here after trying to
2076 * read a single sector.
2078 ret
= blk_end_request(req
, -EIO
,
2083 case MMC_BLK_NOMEDIUM
:
2086 pr_err("%s: Unhandled return value (%d)",
2087 req
->rq_disk
->disk_name
, status
);
2092 if (mmc_packed_cmd(mq_rq
->cmd_type
)) {
2093 if (!mq_rq
->packed
->retries
)
2095 mmc_blk_packed_hdr_wrq_prep(mq_rq
, card
, mq
);
2096 mmc_start_req(card
->host
,
2097 &mq_rq
->mmc_active
, NULL
);
2101 * In case of a incomplete request
2102 * prepare it again and resend.
2104 mmc_blk_rw_rq_prep(mq_rq
, card
,
2106 mmc_start_req(card
->host
,
2107 &mq_rq
->mmc_active
, NULL
);
2109 mq_rq
->brq
.retune_retry_done
= retune_retry_done
;
2116 if (mmc_packed_cmd(mq_rq
->cmd_type
)) {
2117 mmc_blk_abort_packed_req(mq_rq
);
2119 if (mmc_card_removed(card
))
2120 req
->rq_flags
|= RQF_QUIET
;
2122 ret
= blk_end_request(req
, -EIO
,
2123 blk_rq_cur_bytes(req
));
2128 if (mmc_card_removed(card
)) {
2129 rqc
->rq_flags
|= RQF_QUIET
;
2130 blk_end_request_all(rqc
, -EIO
);
2133 * If current request is packed, it needs to put back.
2135 if (mmc_packed_cmd(mq
->mqrq_cur
->cmd_type
))
2136 mmc_blk_revert_packed_req(mq
, mq
->mqrq_cur
);
2138 mmc_blk_rw_rq_prep(mq
->mqrq_cur
, card
, 0, mq
);
2139 mmc_start_req(card
->host
,
2140 &mq
->mqrq_cur
->mmc_active
, NULL
);
2147 int mmc_blk_issue_rq(struct mmc_queue
*mq
, struct request
*req
)
2150 struct mmc_blk_data
*md
= mq
->data
;
2151 struct mmc_card
*card
= md
->queue
.card
;
2152 struct mmc_host
*host
= card
->host
;
2153 unsigned long flags
;
2154 bool req_is_special
= mmc_req_is_special(req
);
2156 if (req
&& !mq
->mqrq_prev
->req
)
2157 /* claim host only for the first request */
2160 ret
= mmc_blk_part_switch(card
, md
);
2163 blk_end_request_all(req
, -EIO
);
2169 mq
->flags
&= ~MMC_QUEUE_NEW_REQUEST
;
2170 if (req
&& req_op(req
) == REQ_OP_DISCARD
) {
2171 /* complete ongoing async transfer before issuing discard */
2172 if (card
->host
->areq
)
2173 mmc_blk_issue_rw_rq(mq
, NULL
);
2174 ret
= mmc_blk_issue_discard_rq(mq
, req
);
2175 } else if (req
&& req_op(req
) == REQ_OP_SECURE_ERASE
) {
2176 /* complete ongoing async transfer before issuing secure erase*/
2177 if (card
->host
->areq
)
2178 mmc_blk_issue_rw_rq(mq
, NULL
);
2179 ret
= mmc_blk_issue_secdiscard_rq(mq
, req
);
2180 } else if (req
&& req_op(req
) == REQ_OP_FLUSH
) {
2181 /* complete ongoing async transfer before issuing flush */
2182 if (card
->host
->areq
)
2183 mmc_blk_issue_rw_rq(mq
, NULL
);
2184 ret
= mmc_blk_issue_flush(mq
, req
);
2186 if (!req
&& host
->areq
) {
2187 spin_lock_irqsave(&host
->context_info
.lock
, flags
);
2188 host
->context_info
.is_waiting_last_req
= true;
2189 spin_unlock_irqrestore(&host
->context_info
.lock
, flags
);
2191 ret
= mmc_blk_issue_rw_rq(mq
, req
);
2195 if ((!req
&& !(mq
->flags
& MMC_QUEUE_NEW_REQUEST
)) || req_is_special
)
2197 * Release host when there are no more requests
2198 * and after special request(discard, flush) is done.
2199 * In case sepecial request, there is no reentry to
2200 * the 'mmc_blk_issue_rq' with 'mqrq_prev->req'.
2206 static inline int mmc_blk_readonly(struct mmc_card
*card
)
2208 return mmc_card_readonly(card
) ||
2209 !(card
->csd
.cmdclass
& CCC_BLOCK_WRITE
);
2212 static struct mmc_blk_data
*mmc_blk_alloc_req(struct mmc_card
*card
,
2213 struct device
*parent
,
2216 const char *subname
,
2219 struct mmc_blk_data
*md
;
2223 if (!ida_pre_get(&mmc_blk_ida
, GFP_KERNEL
))
2224 return ERR_PTR(-ENOMEM
);
2226 spin_lock(&mmc_blk_lock
);
2227 ret
= ida_get_new(&mmc_blk_ida
, &devidx
);
2228 spin_unlock(&mmc_blk_lock
);
2233 return ERR_PTR(ret
);
2235 if (devidx
>= max_devices
) {
2240 md
= kzalloc(sizeof(struct mmc_blk_data
), GFP_KERNEL
);
2246 md
->area_type
= area_type
;
2249 * Set the read-only status based on the supported commands
2250 * and the write protect switch.
2252 md
->read_only
= mmc_blk_readonly(card
);
2254 md
->disk
= alloc_disk(perdev_minors
);
2255 if (md
->disk
== NULL
) {
2260 spin_lock_init(&md
->lock
);
2261 INIT_LIST_HEAD(&md
->part
);
2264 ret
= mmc_init_queue(&md
->queue
, card
, &md
->lock
, subname
);
2268 md
->queue
.data
= md
;
2270 md
->disk
->major
= MMC_BLOCK_MAJOR
;
2271 md
->disk
->first_minor
= devidx
* perdev_minors
;
2272 md
->disk
->fops
= &mmc_bdops
;
2273 md
->disk
->private_data
= md
;
2274 md
->disk
->queue
= md
->queue
.queue
;
2275 md
->parent
= parent
;
2276 set_disk_ro(md
->disk
, md
->read_only
|| default_ro
);
2277 md
->disk
->flags
= GENHD_FL_EXT_DEVT
;
2278 if (area_type
& (MMC_BLK_DATA_AREA_RPMB
| MMC_BLK_DATA_AREA_BOOT
))
2279 md
->disk
->flags
|= GENHD_FL_NO_PART_SCAN
;
2282 * As discussed on lkml, GENHD_FL_REMOVABLE should:
2284 * - be set for removable media with permanent block devices
2285 * - be unset for removable block devices with permanent media
2287 * Since MMC block devices clearly fall under the second
2288 * case, we do not set GENHD_FL_REMOVABLE. Userspace
2289 * should use the block device creation/destruction hotplug
2290 * messages to tell when the card is present.
2293 snprintf(md
->disk
->disk_name
, sizeof(md
->disk
->disk_name
),
2294 "mmcblk%u%s", card
->host
->index
, subname
? subname
: "");
2296 if (mmc_card_mmc(card
))
2297 blk_queue_logical_block_size(md
->queue
.queue
,
2298 card
->ext_csd
.data_sector_size
);
2300 blk_queue_logical_block_size(md
->queue
.queue
, 512);
2302 set_capacity(md
->disk
, size
);
2304 if (mmc_host_cmd23(card
->host
)) {
2305 if ((mmc_card_mmc(card
) &&
2306 card
->csd
.mmca_vsn
>= CSD_SPEC_VER_3
) ||
2307 (mmc_card_sd(card
) &&
2308 card
->scr
.cmds
& SD_SCR_CMD23_SUPPORT
))
2309 md
->flags
|= MMC_BLK_CMD23
;
2312 if (mmc_card_mmc(card
) &&
2313 md
->flags
& MMC_BLK_CMD23
&&
2314 ((card
->ext_csd
.rel_param
& EXT_CSD_WR_REL_PARAM_EN
) ||
2315 card
->ext_csd
.rel_sectors
)) {
2316 md
->flags
|= MMC_BLK_REL_WR
;
2317 blk_queue_write_cache(md
->queue
.queue
, true, true);
2320 if (mmc_card_mmc(card
) &&
2321 (area_type
== MMC_BLK_DATA_AREA_MAIN
) &&
2322 (md
->flags
& MMC_BLK_CMD23
) &&
2323 card
->ext_csd
.packed_event_en
) {
2324 if (!mmc_packed_init(&md
->queue
, card
))
2325 md
->flags
|= MMC_BLK_PACKED_CMD
;
2335 spin_lock(&mmc_blk_lock
);
2336 ida_remove(&mmc_blk_ida
, devidx
);
2337 spin_unlock(&mmc_blk_lock
);
2338 return ERR_PTR(ret
);
2341 static struct mmc_blk_data
*mmc_blk_alloc(struct mmc_card
*card
)
2345 if (!mmc_card_sd(card
) && mmc_card_blockaddr(card
)) {
2347 * The EXT_CSD sector count is in number or 512 byte
2350 size
= card
->ext_csd
.sectors
;
2353 * The CSD capacity field is in units of read_blkbits.
2354 * set_capacity takes units of 512 bytes.
2356 size
= (typeof(sector_t
))card
->csd
.capacity
2357 << (card
->csd
.read_blkbits
- 9);
2360 return mmc_blk_alloc_req(card
, &card
->dev
, size
, false, NULL
,
2361 MMC_BLK_DATA_AREA_MAIN
);
2364 static int mmc_blk_alloc_part(struct mmc_card
*card
,
2365 struct mmc_blk_data
*md
,
2366 unsigned int part_type
,
2369 const char *subname
,
2373 struct mmc_blk_data
*part_md
;
2375 part_md
= mmc_blk_alloc_req(card
, disk_to_dev(md
->disk
), size
, default_ro
,
2376 subname
, area_type
);
2377 if (IS_ERR(part_md
))
2378 return PTR_ERR(part_md
);
2379 part_md
->part_type
= part_type
;
2380 list_add(&part_md
->part
, &md
->part
);
2382 string_get_size((u64
)get_capacity(part_md
->disk
), 512, STRING_UNITS_2
,
2383 cap_str
, sizeof(cap_str
));
2384 pr_info("%s: %s %s partition %u %s\n",
2385 part_md
->disk
->disk_name
, mmc_card_id(card
),
2386 mmc_card_name(card
), part_md
->part_type
, cap_str
);
2390 /* MMC Physical partitions consist of two boot partitions and
2391 * up to four general purpose partitions.
2392 * For each partition enabled in EXT_CSD a block device will be allocatedi
2393 * to provide access to the partition.
2396 static int mmc_blk_alloc_parts(struct mmc_card
*card
, struct mmc_blk_data
*md
)
2400 if (!mmc_card_mmc(card
))
2403 for (idx
= 0; idx
< card
->nr_parts
; idx
++) {
2404 if (card
->part
[idx
].size
) {
2405 ret
= mmc_blk_alloc_part(card
, md
,
2406 card
->part
[idx
].part_cfg
,
2407 card
->part
[idx
].size
>> 9,
2408 card
->part
[idx
].force_ro
,
2409 card
->part
[idx
].name
,
2410 card
->part
[idx
].area_type
);
2419 static void mmc_blk_remove_req(struct mmc_blk_data
*md
)
2421 struct mmc_card
*card
;
2425 * Flush remaining requests and free queues. It
2426 * is freeing the queue that stops new requests
2427 * from being accepted.
2429 card
= md
->queue
.card
;
2430 mmc_cleanup_queue(&md
->queue
);
2431 if (md
->flags
& MMC_BLK_PACKED_CMD
)
2432 mmc_packed_clean(&md
->queue
);
2433 if (md
->disk
->flags
& GENHD_FL_UP
) {
2434 device_remove_file(disk_to_dev(md
->disk
), &md
->force_ro
);
2435 if ((md
->area_type
& MMC_BLK_DATA_AREA_BOOT
) &&
2436 card
->ext_csd
.boot_ro_lockable
)
2437 device_remove_file(disk_to_dev(md
->disk
),
2438 &md
->power_ro_lock
);
2440 del_gendisk(md
->disk
);
2446 static void mmc_blk_remove_parts(struct mmc_card
*card
,
2447 struct mmc_blk_data
*md
)
2449 struct list_head
*pos
, *q
;
2450 struct mmc_blk_data
*part_md
;
2452 list_for_each_safe(pos
, q
, &md
->part
) {
2453 part_md
= list_entry(pos
, struct mmc_blk_data
, part
);
2455 mmc_blk_remove_req(part_md
);
2459 static int mmc_add_disk(struct mmc_blk_data
*md
)
2462 struct mmc_card
*card
= md
->queue
.card
;
2464 device_add_disk(md
->parent
, md
->disk
);
2465 md
->force_ro
.show
= force_ro_show
;
2466 md
->force_ro
.store
= force_ro_store
;
2467 sysfs_attr_init(&md
->force_ro
.attr
);
2468 md
->force_ro
.attr
.name
= "force_ro";
2469 md
->force_ro
.attr
.mode
= S_IRUGO
| S_IWUSR
;
2470 ret
= device_create_file(disk_to_dev(md
->disk
), &md
->force_ro
);
2474 if ((md
->area_type
& MMC_BLK_DATA_AREA_BOOT
) &&
2475 card
->ext_csd
.boot_ro_lockable
) {
2478 if (card
->ext_csd
.boot_ro_lock
& EXT_CSD_BOOT_WP_B_PWR_WP_DIS
)
2481 mode
= S_IRUGO
| S_IWUSR
;
2483 md
->power_ro_lock
.show
= power_ro_lock_show
;
2484 md
->power_ro_lock
.store
= power_ro_lock_store
;
2485 sysfs_attr_init(&md
->power_ro_lock
.attr
);
2486 md
->power_ro_lock
.attr
.mode
= mode
;
2487 md
->power_ro_lock
.attr
.name
=
2488 "ro_lock_until_next_power_on";
2489 ret
= device_create_file(disk_to_dev(md
->disk
),
2490 &md
->power_ro_lock
);
2492 goto power_ro_lock_fail
;
2497 device_remove_file(disk_to_dev(md
->disk
), &md
->force_ro
);
2499 del_gendisk(md
->disk
);
2504 static const struct mmc_fixup blk_fixups
[] =
2506 MMC_FIXUP("SEM02G", CID_MANFID_SANDISK
, 0x100, add_quirk
,
2507 MMC_QUIRK_INAND_CMD38
),
2508 MMC_FIXUP("SEM04G", CID_MANFID_SANDISK
, 0x100, add_quirk
,
2509 MMC_QUIRK_INAND_CMD38
),
2510 MMC_FIXUP("SEM08G", CID_MANFID_SANDISK
, 0x100, add_quirk
,
2511 MMC_QUIRK_INAND_CMD38
),
2512 MMC_FIXUP("SEM16G", CID_MANFID_SANDISK
, 0x100, add_quirk
,
2513 MMC_QUIRK_INAND_CMD38
),
2514 MMC_FIXUP("SEM32G", CID_MANFID_SANDISK
, 0x100, add_quirk
,
2515 MMC_QUIRK_INAND_CMD38
),
2518 * Some MMC cards experience performance degradation with CMD23
2519 * instead of CMD12-bounded multiblock transfers. For now we'll
2520 * black list what's bad...
2521 * - Certain Toshiba cards.
2523 * N.B. This doesn't affect SD cards.
2525 MMC_FIXUP("SDMB-32", CID_MANFID_SANDISK
, CID_OEMID_ANY
, add_quirk_mmc
,
2526 MMC_QUIRK_BLK_NO_CMD23
),
2527 MMC_FIXUP("SDM032", CID_MANFID_SANDISK
, CID_OEMID_ANY
, add_quirk_mmc
,
2528 MMC_QUIRK_BLK_NO_CMD23
),
2529 MMC_FIXUP("MMC08G", CID_MANFID_TOSHIBA
, CID_OEMID_ANY
, add_quirk_mmc
,
2530 MMC_QUIRK_BLK_NO_CMD23
),
2531 MMC_FIXUP("MMC16G", CID_MANFID_TOSHIBA
, CID_OEMID_ANY
, add_quirk_mmc
,
2532 MMC_QUIRK_BLK_NO_CMD23
),
2533 MMC_FIXUP("MMC32G", CID_MANFID_TOSHIBA
, CID_OEMID_ANY
, add_quirk_mmc
,
2534 MMC_QUIRK_BLK_NO_CMD23
),
2537 * Some MMC cards need longer data read timeout than indicated in CSD.
2539 MMC_FIXUP(CID_NAME_ANY
, CID_MANFID_MICRON
, 0x200, add_quirk_mmc
,
2540 MMC_QUIRK_LONG_READ_TIME
),
2541 MMC_FIXUP("008GE0", CID_MANFID_TOSHIBA
, CID_OEMID_ANY
, add_quirk_mmc
,
2542 MMC_QUIRK_LONG_READ_TIME
),
2545 * On these Samsung MoviNAND parts, performing secure erase or
2546 * secure trim can result in unrecoverable corruption due to a
2549 MMC_FIXUP("M8G2FA", CID_MANFID_SAMSUNG
, CID_OEMID_ANY
, add_quirk_mmc
,
2550 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN
),
2551 MMC_FIXUP("MAG4FA", CID_MANFID_SAMSUNG
, CID_OEMID_ANY
, add_quirk_mmc
,
2552 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN
),
2553 MMC_FIXUP("MBG8FA", CID_MANFID_SAMSUNG
, CID_OEMID_ANY
, add_quirk_mmc
,
2554 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN
),
2555 MMC_FIXUP("MCGAFA", CID_MANFID_SAMSUNG
, CID_OEMID_ANY
, add_quirk_mmc
,
2556 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN
),
2557 MMC_FIXUP("VAL00M", CID_MANFID_SAMSUNG
, CID_OEMID_ANY
, add_quirk_mmc
,
2558 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN
),
2559 MMC_FIXUP("VYL00M", CID_MANFID_SAMSUNG
, CID_OEMID_ANY
, add_quirk_mmc
,
2560 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN
),
2561 MMC_FIXUP("KYL00M", CID_MANFID_SAMSUNG
, CID_OEMID_ANY
, add_quirk_mmc
,
2562 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN
),
2563 MMC_FIXUP("VZL00M", CID_MANFID_SAMSUNG
, CID_OEMID_ANY
, add_quirk_mmc
,
2564 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN
),
2567 * On Some Kingston eMMCs, performing trim can result in
2568 * unrecoverable data conrruption occasionally due to a firmware bug.
2570 MMC_FIXUP("V10008", CID_MANFID_KINGSTON
, CID_OEMID_ANY
, add_quirk_mmc
,
2571 MMC_QUIRK_TRIM_BROKEN
),
2572 MMC_FIXUP("V10016", CID_MANFID_KINGSTON
, CID_OEMID_ANY
, add_quirk_mmc
,
2573 MMC_QUIRK_TRIM_BROKEN
),
2578 static int mmc_blk_probe(struct mmc_card
*card
)
2580 struct mmc_blk_data
*md
, *part_md
;
2584 * Check that the card supports the command class(es) we need.
2586 if (!(card
->csd
.cmdclass
& CCC_BLOCK_READ
))
2589 mmc_fixup_device(card
, blk_fixups
);
2591 md
= mmc_blk_alloc(card
);
2595 string_get_size((u64
)get_capacity(md
->disk
), 512, STRING_UNITS_2
,
2596 cap_str
, sizeof(cap_str
));
2597 pr_info("%s: %s %s %s %s\n",
2598 md
->disk
->disk_name
, mmc_card_id(card
), mmc_card_name(card
),
2599 cap_str
, md
->read_only
? "(ro)" : "");
2601 if (mmc_blk_alloc_parts(card
, md
))
2604 dev_set_drvdata(&card
->dev
, md
);
2606 if (mmc_add_disk(md
))
2609 list_for_each_entry(part_md
, &md
->part
, part
) {
2610 if (mmc_add_disk(part_md
))
2614 pm_runtime_set_autosuspend_delay(&card
->dev
, 3000);
2615 pm_runtime_use_autosuspend(&card
->dev
);
2618 * Don't enable runtime PM for SD-combo cards here. Leave that
2619 * decision to be taken during the SDIO init sequence instead.
2621 if (card
->type
!= MMC_TYPE_SD_COMBO
) {
2622 pm_runtime_set_active(&card
->dev
);
2623 pm_runtime_enable(&card
->dev
);
2629 mmc_blk_remove_parts(card
, md
);
2630 mmc_blk_remove_req(md
);
2634 static void mmc_blk_remove(struct mmc_card
*card
)
2636 struct mmc_blk_data
*md
= dev_get_drvdata(&card
->dev
);
2638 mmc_blk_remove_parts(card
, md
);
2639 pm_runtime_get_sync(&card
->dev
);
2640 mmc_claim_host(card
->host
);
2641 mmc_blk_part_switch(card
, md
);
2642 mmc_release_host(card
->host
);
2643 if (card
->type
!= MMC_TYPE_SD_COMBO
)
2644 pm_runtime_disable(&card
->dev
);
2645 pm_runtime_put_noidle(&card
->dev
);
2646 mmc_blk_remove_req(md
);
2647 dev_set_drvdata(&card
->dev
, NULL
);
2650 static int _mmc_blk_suspend(struct mmc_card
*card
)
2652 struct mmc_blk_data
*part_md
;
2653 struct mmc_blk_data
*md
= dev_get_drvdata(&card
->dev
);
2656 mmc_queue_suspend(&md
->queue
);
2657 list_for_each_entry(part_md
, &md
->part
, part
) {
2658 mmc_queue_suspend(&part_md
->queue
);
2664 static void mmc_blk_shutdown(struct mmc_card
*card
)
2666 _mmc_blk_suspend(card
);
2669 #ifdef CONFIG_PM_SLEEP
2670 static int mmc_blk_suspend(struct device
*dev
)
2672 struct mmc_card
*card
= mmc_dev_to_card(dev
);
2674 return _mmc_blk_suspend(card
);
2677 static int mmc_blk_resume(struct device
*dev
)
2679 struct mmc_blk_data
*part_md
;
2680 struct mmc_blk_data
*md
= dev_get_drvdata(dev
);
2684 * Resume involves the card going into idle state,
2685 * so current partition is always the main one.
2687 md
->part_curr
= md
->part_type
;
2688 mmc_queue_resume(&md
->queue
);
2689 list_for_each_entry(part_md
, &md
->part
, part
) {
2690 mmc_queue_resume(&part_md
->queue
);
2697 static SIMPLE_DEV_PM_OPS(mmc_blk_pm_ops
, mmc_blk_suspend
, mmc_blk_resume
);
2699 static struct mmc_driver mmc_driver
= {
2702 .pm
= &mmc_blk_pm_ops
,
2704 .probe
= mmc_blk_probe
,
2705 .remove
= mmc_blk_remove
,
2706 .shutdown
= mmc_blk_shutdown
,
2709 static int __init
mmc_blk_init(void)
2713 if (perdev_minors
!= CONFIG_MMC_BLOCK_MINORS
)
2714 pr_info("mmcblk: using %d minors per device\n", perdev_minors
);
2716 max_devices
= min(MAX_DEVICES
, (1 << MINORBITS
) / perdev_minors
);
2718 res
= register_blkdev(MMC_BLOCK_MAJOR
, "mmc");
2722 res
= mmc_register_driver(&mmc_driver
);
2728 unregister_blkdev(MMC_BLOCK_MAJOR
, "mmc");
2733 static void __exit
mmc_blk_exit(void)
2735 mmc_unregister_driver(&mmc_driver
);
2736 unregister_blkdev(MMC_BLOCK_MAJOR
, "mmc");
2739 module_init(mmc_blk_init
);
2740 module_exit(mmc_blk_exit
);
2742 MODULE_LICENSE("GPL");
2743 MODULE_DESCRIPTION("Multimedia Card (MMC) block device driver");