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Commit 46bc5c40 authored by Jungseung Lee's avatar Jungseung Lee Committed by Ulf Hansson
Browse files

mmc: core: Export device lifetime information through sysfs 



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: default avatarJungseung Lee <js07.lee@samsung.com>
Reviewed-by: default avatarJaehoon Chung <jh80.chung@samsung.com>
Reviewed-by: default avatarShawn Lin <shawn.lin@rock-chips.com>
Signed-off-by: default avatarUlf Hansson <ulf.hansson@linaro.org>
parent b1c95170

drivers/mmc/core/mmc.c

+12 −0
Original line number Diff line number Diff line
@@ -617,6 +617,12 @@ static int mmc_decode_ext_csd(struct mmc_card *card, u8 *ext_csd) 
		card->ext_csd.ffu_capable =

			(ext_csd[EXT_CSD_SUPPORTED_MODE] & 0x1) &&

			!(ext_csd[EXT_CSD_FW_CONFIG] & 0x1);



		card->ext_csd.pre_eol_info = ext_csd[EXT_CSD_PRE_EOL_INFO];

		card->ext_csd.device_life_time_est_typ_a =

			ext_csd[EXT_CSD_DEVICE_LIFE_TIME_EST_TYP_A];

		card->ext_csd.device_life_time_est_typ_b =

			ext_csd[EXT_CSD_DEVICE_LIFE_TIME_EST_TYP_B];

	}



	/* eMMC v5.1 or later */
@@ -764,6 +770,10 @@ MMC_DEV_ATTR(manfid, "0x%06x\n", card->cid.manfid); 
MMC_DEV_ATTR(name, "%s\n", card->cid.prod_name);

MMC_DEV_ATTR(oemid, "0x%04x\n", card->cid.oemid);

MMC_DEV_ATTR(prv, "0x%x\n", card->cid.prv);

MMC_DEV_ATTR(pre_eol_info, "%02x\n", card->ext_csd.pre_eol_info);

MMC_DEV_ATTR(life_time, "0x%02x 0x%02x\n",

	card->ext_csd.device_life_time_est_typ_a,

	card->ext_csd.device_life_time_est_typ_b);

MMC_DEV_ATTR(serial, "0x%08x\n", card->cid.serial);

MMC_DEV_ATTR(enhanced_area_offset, "%llu\n",

		card->ext_csd.enhanced_area_offset);
@@ -817,6 +827,8 @@ static struct attribute *mmc_std_attrs[] = { 
	&dev_attr_name.attr,

	&dev_attr_oemid.attr,

	&dev_attr_prv.attr,

	&dev_attr_pre_eol_info.attr,

	&dev_attr_life_time.attr,

	&dev_attr_serial.attr,

	&dev_attr_enhanced_area_offset.attr,

	&dev_attr_enhanced_area_size.attr,

include/linux/mmc/card.h

+3 −0
Original line number Diff line number Diff line
@@ -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 */

include/linux/mmc/mmc.h

+3 −0
Original line number Diff line number Diff line
@@ -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 */