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mmc: core: Export device lifetime information through sysfs

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In the eMMC 5.0 version of the spec, several EXT_CSD fields about
device lifetime are added.

 - Two types of estimated indications reflected by averaged wear out of memory
 - An indication reflected by average reserved blocks

Export the information through sysfs.

Signed-off-by: Jungseung Lee <js07.lee@samsung.com>
Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>
Reviewed-by: Shawn Lin <shawn.lin@rock-chips.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Jungseung Lee
2016-12-22 12:37:34 +09:00
committed by Ulf Hansson
parent b1c95170f9
commit 46bc5c408e
3 changed files with 18 additions and 0 deletions
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3
include/linux/mmc/card.h
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@@ -121,6 +121,9 @@ struct mmc_ext_csd {
u8 raw_pwr_cl_ddr_200_360; /* 253 */
u8 raw_bkops_status; /* 246 */
u8 raw_sectors[4]; /* 212 - 4 bytes */
u8 pre_eol_info; /* 267 */
u8 device_life_time_est_typ_a; /* 268 */
u8 device_life_time_est_typ_b; /* 269 */
unsigned int feature_support;
#define MMC_DISCARD_FEATURE BIT(0) /* CMD38 feature */

3
include/linux/mmc/mmc.h
View File

@@ -339,6 +339,9 @@ struct _mmc_csd {
#define EXT_CSD_CACHE_SIZE 249 /* RO, 4 bytes */
#define EXT_CSD_PWR_CL_DDR_200_360 253 /* RO */
#define EXT_CSD_FIRMWARE_VERSION 254 /* RO, 8 bytes */
#define EXT_CSD_PRE_EOL_INFO 267 /* RO */
#define EXT_CSD_DEVICE_LIFE_TIME_EST_TYP_A 268 /* RO */
#define EXT_CSD_DEVICE_LIFE_TIME_EST_TYP_B 269 /* RO */
#define EXT_CSD_CMDQ_DEPTH 307 /* RO */
#define EXT_CSD_CMDQ_SUPPORT 308 /* RO */
#define EXT_CSD_SUPPORTED_MODE 493 /* RO */