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scsi: ufs: sysfs: health descriptor 

This patch introduces a sysfs group entry for the UFS health descriptor
parameters. The group adds "health_descriptor" folder under the UFS driver
sysfs entry (/sys/bus/platform/drivers/ufshcd/*). The parameters are shown
as hexadecimal numbers. The full information about the parameters could be
found at UFS specifications 2.1.

Signed-off-by: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Stanislav Nijnikov 2018-02-15 14:14:05 +02:00 committed by Martin K. Petersen
parent c720c09122
commit c648c2d27f
5 changed files with 68 additions and 0 deletions
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28
Documentation/ABI/testing/sysfs-driver-ufs
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@ -413,3 +413,31 @@ Description: This file shows the memory capacity adjustment factor for
descriptor parameters. The full information about the
descriptor could be found at UFS specifications 2.1.
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/health_descriptor/eol_info
Date: February 2018
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
Description: This file shows preend of life information. This is one
of the UFS health descriptor parameters. The full
information about the descriptor could be found at
UFS specifications 2.1.
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/health_descriptor/life_time_estimation_a
Date: February 2018
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
Description: This file shows indication of the device life time
(method a). This is one of the UFS health descriptor
parameters. The full information about the descriptor
could be found at UFS specifications 2.1.
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/health_descriptor/life_time_estimation_b
Date: February 2018
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
Description: This file shows indication of the device life time
(method b). This is one of the UFS health descriptor
parameters. The full information about the descriptor
could be found at UFS specifications 2.1.
The file is read only.

20
drivers/scsi/ufs/ufs-sysfs.c
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@ -349,11 +349,31 @@ static const struct attribute_group ufs_sysfs_geometry_descriptor_group = {
.attrs = ufs_sysfs_geometry_descriptor,
};
#define UFS_HEALTH_DESC_PARAM(_name, _uname, _size) \
UFS_DESC_PARAM(_name, _uname, HEALTH, _size)
UFS_HEALTH_DESC_PARAM(eol_info, _EOL_INFO, 1);
UFS_HEALTH_DESC_PARAM(life_time_estimation_a, _LIFE_TIME_EST_A, 1);
UFS_HEALTH_DESC_PARAM(life_time_estimation_b, _LIFE_TIME_EST_B, 1);
static struct attribute *ufs_sysfs_health_descriptor[] = {
&dev_attr_eol_info.attr,
&dev_attr_life_time_estimation_a.attr,
&dev_attr_life_time_estimation_b.attr,
NULL,
};
static const struct attribute_group ufs_sysfs_health_descriptor_group = {
.name = "health_descriptor",
.attrs = ufs_sysfs_health_descriptor,
};
static const struct attribute_group *ufs_sysfs_groups[] = {
&ufs_sysfs_default_group,
&ufs_sysfs_device_descriptor_group,
&ufs_sysfs_interconnect_descriptor_group,
&ufs_sysfs_geometry_descriptor_group,
&ufs_sysfs_health_descriptor_group,
NULL,
};

11
drivers/scsi/ufs/ufs.h
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@ -154,6 +154,7 @@ enum desc_idn {
QUERY_DESC_IDN_RFU_1 = 0x6,
QUERY_DESC_IDN_GEOMETRY = 0x7,
QUERY_DESC_IDN_POWER = 0x8,
QUERY_DESC_IDN_HEALTH = 0x9,
QUERY_DESC_IDN_MAX,
};
@ -169,6 +170,7 @@ enum ufs_desc_def_size {
QUERY_DESC_INTERCONNECT_DEF_SIZE = 0x06,
QUERY_DESC_GEOMETRY_DEF_SIZE = 0x44,
QUERY_DESC_POWER_DEF_SIZE = 0x62,
QUERY_DESC_HEALTH_DEF_SIZE = 0x25,
};
/* Unit descriptor parameters offsets in bytes*/
@ -274,6 +276,15 @@ enum geometry_desc_param {
GEOMETRY_DESC_PARAM_OPT_LOG_BLK_SIZE = 0x44,
};
/* Health descriptor parameters offsets in bytes*/
enum health_desc_param {
HEALTH_DESC_PARAM_LEN = 0x0,
HEALTH_DESC_PARAM_TYPE = 0x1,
HEALTH_DESC_PARAM_EOL_INFO = 0x2,
HEALTH_DESC_PARAM_LIFE_TIME_EST_A = 0x3,
HEALTH_DESC_PARAM_LIFE_TIME_EST_B = 0x4,
};
/*
* Logical Unit Write Protect
* 00h: LU not write protected

8
drivers/scsi/ufs/ufshcd.c
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@ -2966,6 +2966,9 @@ int ufshcd_map_desc_id_to_length(struct ufs_hba *hba,
case QUERY_DESC_IDN_STRING:
*desc_len = QUERY_DESC_MAX_SIZE;
break;
case QUERY_DESC_IDN_HEALTH:
*desc_len = hba->desc_size.hlth_desc;
break;
case QUERY_DESC_IDN_RFU_0:
case QUERY_DESC_IDN_RFU_1:
*desc_len = 0;
@ -6277,6 +6280,10 @@ static void ufshcd_init_desc_sizes(struct ufs_hba *hba)
&hba->desc_size.geom_desc);
if (err)
hba->desc_size.geom_desc = QUERY_DESC_GEOMETRY_DEF_SIZE;
err = ufshcd_read_desc_length(hba, QUERY_DESC_IDN_HEALTH, 0,
&hba->desc_size.hlth_desc);
if (err)
hba->desc_size.hlth_desc = QUERY_DESC_HEALTH_DEF_SIZE;
}
static void ufshcd_def_desc_sizes(struct ufs_hba *hba)
@ -6287,6 +6294,7 @@ static void ufshcd_def_desc_sizes(struct ufs_hba *hba)
hba->desc_size.conf_desc = QUERY_DESC_CONFIGURATION_DEF_SIZE;
hba->desc_size.unit_desc = QUERY_DESC_UNIT_DEF_SIZE;
hba->desc_size.geom_desc = QUERY_DESC_GEOMETRY_DEF_SIZE;
hba->desc_size.hlth_desc = QUERY_DESC_HEALTH_DEF_SIZE;
}
/**

1
drivers/scsi/ufs/ufshcd.h
View File

@ -229,6 +229,7 @@ struct ufs_desc_size {
int interc_desc;
int unit_desc;
int conf_desc;
int hlth_desc;
};
/**