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scsi: ufs: sysfs: flags 

This patch introduces a sysfs group entry for the UFS flags. The group adds
"flags" folder under the UFS driver sysfs entry
(/sys/bus/platform/drivers/ufshcd/*). The flags are shown as boolean value
("true" or "false"). The full information about the UFS flags 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 14:14:10 +02:00 committed by Martin K. Petersen
parent d829fc8a10
commit d10b2a8ea8
3 changed files with 115 additions and 3 deletions
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65
Documentation/ABI/testing/sysfs-driver-ufs
View File

@ -598,3 +598,68 @@ Description: This file shows the granularity of the LUN. This is one of
the UFS unit 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/*/flags/device_init
Date: February 2018
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
Description: This file shows the device init status. The full information
about the flag could be found at UFS specifications 2.1.
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/flags/permanent_wpe
Date: February 2018
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
Description: This file shows whether permanent write protection is enabled.
The full information about the flag could be found at
UFS specifications 2.1.
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/flags/power_on_wpe
Date: February 2018
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
Description: This file shows whether write protection is enabled on all
logical units configured as power on write protected. The
full information about the flag could be found at
UFS specifications 2.1.
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/flags/bkops_enable
Date: February 2018
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
Description: This file shows whether the device background operations are
enabled. The full information about the flag could be
found at UFS specifications 2.1.
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/flags/life_span_mode_enable
Date: February 2018
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
Description: This file shows whether the device life span mode is enabled.
The full information about the flag could be found at
UFS specifications 2.1.
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/flags/phy_resource_removal
Date: February 2018
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
Description: This file shows whether physical resource removal is enable.
The full information about the flag could be found at
UFS specifications 2.1.
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/flags/busy_rtc
Date: February 2018
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
Description: This file shows whether the device is executing internal
operation related to real time clock. The full information
about the flag could be found at UFS specifications 2.1.
The file is read only.
What: /sys/bus/platform/drivers/ufshcd/*/flags/disable_fw_update
Date: February 2018
Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
Description: This file shows whether the device FW update is permanently
disabled. The full information about the flag could be found
at UFS specifications 2.1.
The file is read only.

39
drivers/scsi/ufs/ufs-sysfs.c
View File

@ -538,6 +538,44 @@ static const struct attribute_group ufs_sysfs_string_descriptors_group = {
.attrs = ufs_sysfs_string_descriptors,
};
#define UFS_FLAG(_name, _uname) \
static ssize_t _name##_show(struct device *dev, \
struct device_attribute *attr, char *buf) \
{ \
bool flag; \
struct ufs_hba *hba = dev_get_drvdata(dev); \
if (ufshcd_query_flag(hba, UPIU_QUERY_OPCODE_READ_FLAG, \
QUERY_FLAG_IDN##_uname, &flag)) \
return -EINVAL; \
return sprintf(buf, "%s\n", flag ? "true" : "false"); \
} \
static DEVICE_ATTR_RO(_name)
UFS_FLAG(device_init, _FDEVICEINIT);
UFS_FLAG(permanent_wpe, _PERMANENT_WPE);
UFS_FLAG(power_on_wpe, _PWR_ON_WPE);
UFS_FLAG(bkops_enable, _BKOPS_EN);
UFS_FLAG(life_span_mode_enable, _LIFE_SPAN_MODE_ENABLE);
UFS_FLAG(phy_resource_removal, _FPHYRESOURCEREMOVAL);
UFS_FLAG(busy_rtc, _BUSY_RTC);
UFS_FLAG(disable_fw_update, _PERMANENTLY_DISABLE_FW_UPDATE);
static struct attribute *ufs_sysfs_device_flags[] = {
&dev_attr_device_init.attr,
&dev_attr_permanent_wpe.attr,
&dev_attr_power_on_wpe.attr,
&dev_attr_bkops_enable.attr,
&dev_attr_life_span_mode_enable.attr,
&dev_attr_phy_resource_removal.attr,
&dev_attr_busy_rtc.attr,
&dev_attr_disable_fw_update.attr,
NULL,
};
static const struct attribute_group ufs_sysfs_flags_group = {
.name = "flags",
.attrs = ufs_sysfs_device_flags,
};
static const struct attribute_group *ufs_sysfs_groups[] = {
&ufs_sysfs_default_group,
@ -547,6 +585,7 @@ static const struct attribute_group *ufs_sysfs_groups[] = {
&ufs_sysfs_health_descriptor_group,
&ufs_sysfs_power_descriptor_group,
&ufs_sysfs_string_descriptors_group,
&ufs_sysfs_flags_group,
NULL,
};

14
drivers/scsi/ufs/ufs.h
View File

@ -130,9 +130,17 @@ enum {
/* Flag idn for Query Requests*/
enum flag_idn {
QUERY_FLAG_IDN_FDEVICEINIT = 0x01,
QUERY_FLAG_IDN_PWR_ON_WPE = 0x03,
QUERY_FLAG_IDN_BKOPS_EN = 0x04,
QUERY_FLAG_IDN_FDEVICEINIT = 0x01,
QUERY_FLAG_IDN_PERMANENT_WPE = 0x02,
QUERY_FLAG_IDN_PWR_ON_WPE = 0x03,
QUERY_FLAG_IDN_BKOPS_EN = 0x04,
QUERY_FLAG_IDN_LIFE_SPAN_MODE_ENABLE = 0x05,
QUERY_FLAG_IDN_PURGE_ENABLE = 0x06,
QUERY_FLAG_IDN_RESERVED2 = 0x07,
QUERY_FLAG_IDN_FPHYRESOURCEREMOVAL = 0x08,
QUERY_FLAG_IDN_BUSY_RTC = 0x09,
QUERY_FLAG_IDN_RESERVED3 = 0x0A,
QUERY_FLAG_IDN_PERMANENTLY_DISABLE_FW_UPDATE = 0x0B,
};
/* Attribute idn for Query requests */