kernel / Documentation / ABI / testing / sysfs-driver-ufs

What:		/sys/bus/*/drivers/ufshcd/*/auto_hibern8
Date:		March 2018
Contact:	[e-mail]
Description:
		This file contains the auto-hibernate idle timer setting of a
		UFS host controller. A value of '0' means auto-hibernate is not
		enabled. Otherwise the value is the number of microseconds of
		idle time before the UFS host controller will autonomously put
		the link into hibernate state. That will save power at the
		expense of increased latency. Note that the hardware supports
		10-bit values with a power-of-ten multiplier which allows a
		maximum value of 102300000. Refer to the UFS Host Controller
		Interface specification for more details.

What:		/sys/bus/platform/drivers/ufshcd/*/device_descriptor/device_type
What:		/sys/bus/platform/devices/*.ufs/device_descriptor/device_type
Date:		February 2018
Contact:	Stanislav Nijnikov <[e-mail]>
Description:	This file shows the device type. This is one of the UFS
		device 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/*/device_descriptor/device_class
What:		/sys/bus/platform/devices/*.ufs/device_descriptor/device_class
Date:		February 2018
Contact:	Stanislav Nijnikov <[e-mail]>
Description:	This file shows the device class. This is one of the UFS
		device 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/*/device_descriptor/device_sub_class
What:		/sys/bus/platform/devices/*.ufs/device_descriptor/device_sub_class
Date:		February 2018
Contact:	Stanislav Nijnikov <[e-mail]>
Description:	This file shows the UFS storage subclass. This is one of
		the UFS device 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/*/device_descriptor/protocol
What:		/sys/bus/platform/devices/*.ufs/device_descriptor/protocol
Date:		February 2018
Contact:	Stanislav Nijnikov <[e-mail]>
Description:	This file shows the protocol supported by an UFS device.
		This is one of the UFS device 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/*/device_descriptor/number_of_luns
What:		/sys/bus/platform/devices/*.ufs/device_descriptor/number_of_luns
Date:		February 2018
Contact:	Stanislav Nijnikov <[e-mail]>
Description:	This file shows number of logical units. This is one of
		the UFS device 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/*/device_descriptor/number_of_wluns
What:		/sys/bus/platform/devices/*.ufs/device_descriptor/number_of_wluns
Date:		February 2018
Contact:	Stanislav Nijnikov <[e-mail]>
Description:	This file shows number of well known logical units.
		This is one of the UFS device 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/*/device_descriptor/boot_enable
What:		/sys/bus/platform/devices/*.ufs/device_descriptor/boot_enable
Date:		February 2018
Contact:	Stanislav Nijnikov <[e-mail]>
Description:	This file shows value that indicates whether the device is
		enabled for boot. This is one of the UFS device 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/*/device_descriptor/descriptor_access_enable
What:		/sys/bus/platform/devices/*.ufs/device_descriptor/descriptor_access_enable
Date:		February 2018
Contact:	Stanislav Nijnikov <[e-mail]>
Description:	This file shows value that indicates whether the device
		descriptor could be read after partial initialization phase
		of the boot sequence. This is one of the UFS device 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/*/device_descriptor/initial_power_mode
What:		/sys/bus/platform/devices/*.ufs/device_descriptor/initial_power_mode
Date:		February 2018
Contact:	Stanislav Nijnikov <[e-mail]>
Description:	This file shows value that defines the power mode after
		device initialization or hardware reset. This is one of
		the UFS device 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/*/device_descriptor/high_priority_lun
What:		/sys/bus/platform/devices/*.ufs/device_descriptor/high_priority_lun
Date:		February 2018
Contact:	Stanislav Nijnikov <[e-mail]>
Description:	This file shows the high priority lun. This is one of
		the UFS device 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/*/device_descriptor/secure_removal_type
What:		/sys/bus/platform/devices/*.ufs/device_descriptor/secure_removal_type
Date:		February 2018
Contact:	Stanislav Nijnikov <[e-mail]>
Description:	This file shows the secure removal type. This is one of
		the UFS device 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/*/device_descriptor/support_security_lun
What:		/sys/bus/platform/devices/*.ufs/device_descriptor/support_security_lun
Date:		February 2018
Contact:	Stanislav Nijnikov <[e-mail]>
Description:	This file shows whether the security lun is supported.
		This is one of the UFS device 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/*/device_descriptor/bkops_termination_latency
What:		/sys/bus/platform/devices/*.ufs/device_descriptor/bkops_termination_latency
Date:		February 2018
Contact:	Stanislav Nijnikov <[e-mail]>
Description:	This file shows the background operations termination
		latency. This is one of the UFS device 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/*/device_descriptor/initial_active_icc_level
What:		/sys/bus/platform/devices/*.ufs/device_descriptor/initial_active_icc_level
Date:		February 2018
Contact:	Stanislav Nijnikov <[e-mail]>
Description:	This file shows the initial active ICC level. This is one
		of the UFS device 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/*/device_descriptor/specification_version
What:		/sys/bus/platform/devices/*.ufs/device_descriptor/specification_version
Date:		February 2018
Contact:	Stanislav Nijnikov <[e-mail]>
Description:	This file shows the specification version. This is one
		of the UFS device 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/*/device_descriptor/manufacturing_date
What:		/sys/bus/platform/devices/*.ufs/device_descriptor/manufacturing_date
Date:		February 2018
Contact:	Stanislav Nijnikov <[e-mail]>
Description:	This file shows the manufacturing date in BCD format.
		This is one of the UFS device 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/*/device_descriptor/manufacturer_id
What:		/sys/bus/platform/devices/*.ufs/device_descriptor/manufacturer_id
Date:		February 2018
Contact:	Stanislav Nijnikov <[e-mail]>
Description:	This file shows the manufacturer ID. This is one of the
		UFS device 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/*/device_descriptor/rtt_capability
What:		/sys/bus/platform/devices/*.ufs/device_descriptor/rtt_capability
Date:		February 2018
Contact:	Stanislav Nijnikov <[e-mail]>
Description:	This file shows the maximum number of outstanding RTTs
		supported by the device. This is one of the UFS device
		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/*/device_descriptor/rtc_update
What:		/sys/bus/platform/devices/*.ufs/device_descriptor/rtc_update
Date:		February 2018
Contact:	Stanislav Nijnikov <[e-mail]>
Description:	This file shows the frequency and method of the realtime
		clock update. This is one of the UFS device 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/*/device_descriptor/ufs_features
What:		/sys/bus/platform/devices/*.ufs/device_descriptor/ufs_features
Date:		February 2018
Contact:	Stanislav Nijnikov <[e-mail]>
Description:	This file shows which features are supported by the device.
		This is one of the UFS device 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/*/device_descriptor/ffu_timeout
What:		/sys/bus/platform/devices/*.ufs/device_descriptor/ffu_timeout
Date:		February 2018
Contact:	Stanislav Nijnikov <[e-mail]>
Description:	This file shows the FFU timeout. This is one of the
		UFS device 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/*/device_descriptor/queue_depth
What:		/sys/bus/platform/devices/*.ufs/device_descriptor/queue_depth
Date:		February 2018
Contact:	Stanislav Nijnikov <[e-mail]>
Description:	This file shows the device queue depth. This is one of the
		UFS device 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/*/device_descriptor/device_version
What:		/sys/bus/platform/devices/*.ufs/device_descriptor/device_version
Date:		February 2018
Contact:	Stanislav Nijnikov <[e-mail]>
Description:	This file shows the device version. This is one of the
		UFS device 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/*/device_descriptor/number_of_secure_wpa
What:		/sys/bus/platform/devices/*.ufs/device_descriptor/number_of_secure_wpa
Date:		February 2018
Contact:	Stanislav Nijnikov <[e-mail]>
Description:	This file shows number of secure write protect areas
		supported by the device. This is one of the UFS device
		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/*/device_descriptor/psa_max_data_size
What:		/sys/bus/platform/devices/*.ufs/device_descriptor/psa_max_data_size
Date:		February 2018
Contact:	Stanislav Nijnikov <[e-mail]>
Description:	This file shows the maximum amount of data that may be
		written during the pre-soldering phase of the PSA flow.
		This is one of the UFS device 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/*/device_descriptor/psa_state_timeout
What:		/sys/bus/platform/devices/*.ufs/device_descriptor/psa_state_timeout
Date:		February 2018
Contact:	Stanislav Nijnikov <[e-mail]>
Description:	This file shows the command maximum timeout for a change
		in PSA state. This is one of the UFS device 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/*/interconnect_descriptor/unipro_version
What:		/sys/bus/platform/devices/*.ufs/interconnect_descriptor/unipro_version
Date:		February 2018
Contact:	Stanislav Nijnikov <[e-mail]>
Description:	This file shows the MIPI UniPro version number in BCD format.
		This is one of the UFS interconnect 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/*/interconnect_descriptor/mphy_version
What:		/sys/bus/platform/devices/*.ufs/interconnect_descriptor/mphy_version
Date:		February 2018
Contact:	Stanislav Nijnikov <[e-mail]>
Description:	This file shows the MIPI M-PHY version number in BCD format.
		This is one of the UFS interconnect 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/*/geometry_descriptor/raw_device_capacity
What:		/sys/bus/platform/devices/*.ufs/geometry_descriptor/raw_device_capacity
Date:		February 2018
Contact:	Stanislav Nijnikov <[e-mail]>
Description:	This file shows the total memory quantity available to
		the user to configure the device logical units. This is one
		of the UFS geometry 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/*/geometry_descriptor/max_number_of_luns
What:		/sys/bus/platform/devices/*.ufs/geometry_descriptor/max_number_of_luns
Date:		February 2018
Contact:	Stanislav Nijnikov <[e-mail]>
Description:	This file shows the maximum number of logical units
		supported by the UFS device. This is one of the UFS
		geometry 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/*/geometry_descriptor/segment_size
What:		/sys/bus/platform/devices/*.ufs/geometry_descriptor/segment_size
Date:		February 2018
Contact:	Stanislav Nijnikov <[e-mail]>
Description:	This file shows the segment size. This is one of the UFS
		geometry 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/*/geometry_descriptor/allocation_unit_size
What:		/sys/bus/platform/devices/*.ufs/geometry_descriptor/allocation_unit_size
Date:		February 2018
Contact:	Stanislav Nijnikov <[e-mail]>
Description:	This file shows the allocation unit size. This is one of
		the UFS geometry 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/*/geometry_descriptor/min_addressable_block_size
What:		/sys/bus/platform/devices/*.ufs/geometry_descriptor/min_addressable_block_size
Date:		February 2018
Contact:	Stanislav Nijnikov <[e-mail]>
Description:	This file shows the minimum addressable block size. This
		is one of the UFS geometry 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/*/geometry_descriptor/optimal_read_block_size
What:		/sys/bus/platform/devices/*.ufs/geometry_descriptor/optimal_read_block_size
Date:		February 2018
Contact:	Stanislav Nijnikov <[e-mail]>
Description:	This file shows the optimal read block size. This is one
		of the UFS geometry 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/*/geometry_descriptor/optimal_write_block_size
What:		/sys/bus/platform/devices/*.ufs/geometry_descriptor/optimal_write_block_size
Date:		February 2018
Contact:	Stanislav Nijnikov <[e-mail]>
Description:	This file shows the optimal write block size. This is one
		of the UFS geometry 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/*/geometry_descriptor/max_in_buffer_size
What:		/sys/bus/platform/devices/*.ufs/geometry_descriptor/max_in_buffer_size
Date:		February 2018
Contact:	Stanislav Nijnikov <[e-mail]>
Description:	This file shows the maximum data-in buffer size. This
		is one of the UFS geometry 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/*/geometry_descriptor/max_out_buffer_size
What:		/sys/bus/platform/devices/*.ufs/geometry_descriptor/max_out_buffer_size
Date:		February 2018
Contact:	Stanislav Nijnikov <[e-mail]>
Description:	This file shows the maximum data-out buffer size. This
		is one of the UFS geometry 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/*/geometry_descriptor/rpmb_rw_size
What:		/sys/bus/platform/devices/*.ufs/geometry_descriptor/rpmb_rw_size
Date:		February 2018
Contact:	Stanislav Nijnikov <[e-mail]>
Description:	This file shows the maximum number of RPMB frames allowed
		in Security Protocol In/Out. This is one of the UFS geometry
		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/*/geometry_descriptor/dyn_capacity_resource_policy
What:		/sys/bus/platform/devices/*.ufs/geometry_descriptor/dyn_capacity_resource_policy
Date:		February 2018
Contact:	Stanislav Nijnikov <[e-mail]>
Description:	This file shows the dynamic capacity resource policy. This
		is one of the UFS geometry 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/*/geometry_descriptor/data_ordering
What:		/sys/bus/platform/devices/*.ufs/geometry_descriptor/data_ordering
Date:		February 2018
Contact:	Stanislav Nijnikov <[e-mail]>
Description:	This file shows support for out-of-order data transfer.
		This is one of the UFS geometry 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/*/geometry_descriptor/max_number_of_contexts
What:		/sys/bus/platform/devices/*.ufs/geometry_descriptor/max_number_of_contexts
Date:		February 2018
Contact:	Stanislav Nijnikov <[e-mail]>
Description:	This file shows maximum available number of contexts which
		are supported by the device. This is one of the UFS geometry
		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/*/geometry_descriptor/sys_data_tag_unit_size
What:		/sys/bus/platform/devices/*.ufs/geometry_descriptor/sys_data_tag_unit_size
Date:		February 2018
Contact:	Stanislav Nijnikov <[e-mail]>
Description:	This file shows system data tag unit size. This is one of
		the UFS geometry 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/*/geometry_descriptor/sys_data_tag_resource_size
What:		/sys/bus/platform/devices/*.ufs/geometry_descriptor/sys_data_tag_resource_size
Date:		February 2018
Contact:	Stanislav Nijnikov <[e-mail]>
Description:	This file shows maximum storage area size allocated by
		the device to handle system data by the tagging mechanism.
		This is one of the UFS geometry 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/*/geometry_descriptor/secure_removal_types
What:		/sys/bus/platform/devices/*.ufs/geometry_descriptor/secure_removal_types
Date:		February 2018
Contact:	Stanislav Nijnikov <[e-mail]>
Description:	This file shows supported secure removal types. This is
		one of the UFS geometry 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/*/geometry_descriptor/memory_types
What:		/sys/bus/platform/devices/*.ufs/geometry_descriptor/memory_types
Date:		February 2018
Contact:	Stanislav Nijnikov <[e-mail]>
Description:	This file shows supported memory types. This is one of
		the UFS geometry 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/*/geometry_descriptor/*_memory_max_alloc_units
What:		/sys/bus/platform/devices/*.ufs/geometry_descriptor/*_memory_max_alloc_units
Date:		February 2018
Contact:	Stanislav Nijnikov <[e-mail]>
Description:	This file shows the maximum number of allocation units for
		different memory types (system code, non persistent,
		enhanced type 1-4). This is one of the UFS geometry
		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/*/geometry_descriptor/*_memory_capacity_adjustment_factor
What:		/sys/bus/platform/devices/*.ufs/geometry_descriptor/*_memory_capacity_adjustment_factor
Date:		February 2018
Contact:	Stanislav Nijnikov <[e-mail]>
Description:	This file shows the memory capacity adjustment factor for
		different memory types (system code, non persistent,
		enhanced type 1-4). This is one of the UFS geometry
		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
What:		/sys/bus/platform/devices/*.ufs/health_descriptor/eol_info
Date:		February 2018
Contact:	Stanislav Nijnikov <[e-mail]>
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
What:		/sys/bus/platform/devices/*.ufs/health_descriptor/life_time_estimation_a
Date:		February 2018
Contact:	Stanislav Nijnikov <[e-mail]>
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
What:		/sys/bus/platform/devices/*.ufs/health_descriptor/life_time_estimation_b
Date:		February 2018
Contact:	Stanislav Nijnikov <[e-mail]>
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.


What:		/sys/bus/platform/drivers/ufshcd/*/power_descriptor/active_icc_levels_vcc*
What:		/sys/bus/platform/devices/*.ufs/power_descriptor/active_icc_levels_vcc*
Date:		February 2018
Contact:	Stanislav Nijnikov <[e-mail]>
Description:	This file shows maximum VCC, VCCQ and VCCQ2 value for
		active ICC levels from 0 to 15. This is one of the UFS
		power 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/*/string_descriptors/manufacturer_name
What:		/sys/bus/platform/devices/*.ufs/string_descriptors/manufacturer_name
Date:		February 2018
Contact:	Stanislav Nijnikov <[e-mail]>
Description:	This file contains a device manufacturer name string.
		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/*/string_descriptors/product_name
What:		/sys/bus/platform/devices/*.ufs/string_descriptors/product_name
Date:		February 2018
Contact:	Stanislav Nijnikov <[e-mail]>
Description:	This file contains a product name string. 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/*/string_descriptors/oem_id
What:		/sys/bus/platform/devices/*.ufs/string_descriptors/oem_id
Date:		February 2018
Contact:	Stanislav Nijnikov <[e-mail]>
Description:	This file contains a OEM ID string. 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/*/string_descriptors/serial_number
What:		/sys/bus/platform/devices/*.ufs/string_descriptors/serial_number
Date:		February 2018
Contact:	Stanislav Nijnikov <[e-mail]>
Description:	This file contains a device serial number string. 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/*/string_descriptors/product_revision
What:		/sys/bus/platform/devices/*.ufs/string_descriptors/product_revision
Date:		February 2018
Contact:	Stanislav Nijnikov <[e-mail]>
Description:	This file contains a product revision string. The full
		information about the descriptor could be found at
		UFS specifications 2.1.

		The file is read only.


What:		/sys/class/scsi_device/*/device/unit_descriptor/boot_lun_id
Date:		February 2018
Contact:	Stanislav Nijnikov <[e-mail]>
Description:	This file shows boot LUN information. 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/class/scsi_device/*/device/unit_descriptor/lun_write_protect
Date:		February 2018
Contact:	Stanislav Nijnikov <[e-mail]>
Description:	This file shows LUN write protection status. 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/class/scsi_device/*/device/unit_descriptor/lun_queue_depth
Date:		February 2018
Contact:	Stanislav Nijnikov <[e-mail]>
Description:	This file shows LUN queue depth. 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/class/scsi_device/*/device/unit_descriptor/psa_sensitive
Date:		February 2018
Contact:	Stanislav Nijnikov <[e-mail]>
Description:	This file shows PSA sensitivity. 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/class/scsi_device/*/device/unit_descriptor/lun_memory_type
Date:		February 2018
Contact:	Stanislav Nijnikov <[e-mail]>
Description:	This file shows LUN memory type. 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/class/scsi_device/*/device/unit_descriptor/data_reliability
Date:		February 2018
Contact:	Stanislav Nijnikov <[e-mail]>
Description:	This file defines the device behavior when a power failure
		occurs during a write operation. 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/class/scsi_device/*/device/unit_descriptor/logical_block_size
Date:		February 2018
Contact:	Stanislav Nijnikov <[e-mail]>
Description:	This file shows the size of addressable logical blocks
		(calculated as an exponent with base 2). 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/class/scsi_device/*/device/unit_descriptor/logical_block_count
Date:		February 2018
Contact:	Stanislav Nijnikov <[e-mail]>
Description:	This file shows total number of addressable logical blocks.
		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/class/scsi_device/*/device/unit_descriptor/erase_block_size
Date:		February 2018
Contact:	Stanislav Nijnikov <[e-mail]>
Description:	This file shows the erase block size. 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/class/scsi_device/*/device/unit_descriptor/provisioning_type
Date:		February 2018
Contact:	Stanislav Nijnikov <[e-mail]>
Description:	This file shows the thin provisioning type. 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/class/scsi_device/*/device/unit_descriptor/physical_memory_resource_count
Date:		February 2018
Contact:	Stanislav Nijnikov <[e-mail]>
Description:	This file shows the total physical memory resources. 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/class/scsi_device/*/device/unit_descriptor/context_capabilities
Date:		February 2018
Contact:	Stanislav Nijnikov <[e-mail]>
Description:	This file shows the context capabilities. 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/class/scsi_device/*/device/unit_descriptor/large_unit_granularity
Date:		February 2018
Contact:	Stanislav Nijnikov <[e-mail]>
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
What:		/sys/bus/platform/devices/*.ufs/flags/device_init
Date:		February 2018
Contact:	Stanislav Nijnikov <[e-mail]>
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
What:		/sys/bus/platform/devices/*.ufs/flags/permanent_wpe
Date:		February 2018
Contact:	Stanislav Nijnikov <[e-mail]>
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
What:		/sys/bus/platform/devices/*.ufs/flags/power_on_wpe
Date:		February 2018
Contact:	Stanislav Nijnikov <[e-mail]>
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
What:		/sys/bus/platform/devices/*.ufs/flags/bkops_enable
Date:		February 2018
Contact:	Stanislav Nijnikov <[e-mail]>
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
What:		/sys/bus/platform/devices/*.ufs/flags/life_span_mode_enable
Date:		February 2018
Contact:	Stanislav Nijnikov <[e-mail]>
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
What:		/sys/bus/platform/devices/*.ufs/flags/phy_resource_removal
Date:		February 2018
Contact:	Stanislav Nijnikov <[e-mail]>
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
What:		/sys/bus/platform/devices/*.ufs/flags/busy_rtc
Date:		February 2018
Contact:	Stanislav Nijnikov <[e-mail]>
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
What:		/sys/bus/platform/devices/*.ufs/flags/disable_fw_update
Date:		February 2018
Contact:	Stanislav Nijnikov <[e-mail]>
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.


What:		/sys/bus/platform/drivers/ufshcd/*/attributes/boot_lun_enabled
What:		/sys/bus/platform/devices/*.ufs/attributes/boot_lun_enabled
Date:		February 2018
Contact:	Stanislav Nijnikov <[e-mail]>
Description:	This file provides the boot lun enabled UFS device attribute.
		The full information about the attribute could be found at
		UFS specifications 2.1.

		The file is read only.

What:		/sys/bus/platform/drivers/ufshcd/*/attributes/current_power_mode
What:		/sys/bus/platform/devices/*.ufs/attributes/current_power_mode
Date:		February 2018
Contact:	Stanislav Nijnikov <[e-mail]>
Description:	This file provides the current power mode UFS device attribute.
		The full information about the attribute could be found at
		UFS specifications 2.1.

		The file is read only.

What:		/sys/bus/platform/drivers/ufshcd/*/attributes/active_icc_level
What:		/sys/bus/platform/devices/*.ufs/attributes/active_icc_level
Date:		February 2018
Contact:	Stanislav Nijnikov <[e-mail]>
Description:	This file provides the active icc level UFS device attribute.
		The full information about the attribute could be found at
		UFS specifications 2.1.

		The file is read only.

What:		/sys/bus/platform/drivers/ufshcd/*/attributes/ooo_data_enabled
What:		/sys/bus/platform/devices/*.ufs/attributes/ooo_data_enabled
Date:		February 2018
Contact:	Stanislav Nijnikov <[e-mail]>
Description:	This file provides the out of order data transfer enabled UFS
		device attribute. The full information about the attribute
		could be found at UFS specifications 2.1.

		The file is read only.

What:		/sys/bus/platform/drivers/ufshcd/*/attributes/bkops_status
What:		/sys/bus/platform/devices/*.ufs/attributes/bkops_status
Date:		February 2018
Contact:	Stanislav Nijnikov <[e-mail]>
Description:	This file provides the background operations status UFS device
		attribute. The full information about the attribute could
		be found at UFS specifications 2.1.

		The file is read only.

What:		/sys/bus/platform/drivers/ufshcd/*/attributes/purge_status
What:		/sys/bus/platform/devices/*.ufs/attributes/purge_status
Date:		February 2018
Contact:	Stanislav Nijnikov <[e-mail]>
Description:	This file provides the purge operation status UFS device
		attribute. The full information about the attribute could
		be found at UFS specifications 2.1.

		The file is read only.

What:		/sys/bus/platform/drivers/ufshcd/*/attributes/max_data_in_size
What:		/sys/bus/platform/devices/*.ufs/attributes/max_data_in_size
Date:		February 2018
Contact:	Stanislav Nijnikov <[e-mail]>
Description:	This file shows the maximum data size in a DATA IN
		UPIU. The full information about the attribute could
		be found at UFS specifications 2.1.

		The file is read only.

What:		/sys/bus/platform/drivers/ufshcd/*/attributes/max_data_out_size
What:		/sys/bus/platform/devices/*.ufs/attributes/max_data_out_size
Date:		February 2018
Contact:	Stanislav Nijnikov <[e-mail]>
Description:	This file shows the maximum number of bytes that can be
		requested with a READY TO TRANSFER UPIU. The full information
		about the attribute could be found at UFS specifications 2.1.

		The file is read only.

What:		/sys/bus/platform/drivers/ufshcd/*/attributes/reference_clock_frequency
What:		/sys/bus/platform/devices/*.ufs/attributes/reference_clock_frequency
Date:		February 2018
Contact:	Stanislav Nijnikov <[e-mail]>
Description:	This file provides the reference clock frequency UFS device
		attribute. The full information about the attribute could
		be found at UFS specifications 2.1.

		The file is read only.

What:		/sys/bus/platform/drivers/ufshcd/*/attributes/configuration_descriptor_lock
What:		/sys/bus/platform/devices/*.ufs/attributes/configuration_descriptor_lock
Date:		February 2018
Contact:	Stanislav Nijnikov <[e-mail]>
Description:	This file shows whether the configuration descriptor is locked.
		The full information about the attribute could be found at
		UFS specifications 2.1. The file is read only.

What:		/sys/bus/platform/drivers/ufshcd/*/attributes/max_number_of_rtt
What:		/sys/bus/platform/devices/*.ufs/attributes/max_number_of_rtt
Date:		May 2024
Contact:	Avri Altman <[e-mail]>
Description:	This file provides the maximum current number of
		outstanding RTTs in device that is allowed. bMaxNumOfRTT is a
		read-write persistent attribute and is equal to two after device
		manufacturing. It shall not be set to a value greater than
		bDeviceRTTCap value, and it may be set only when the hw queues are
		empty.

		The file is read write.

What:		/sys/bus/platform/drivers/ufshcd/*/attributes/exception_event_control
What:		/sys/bus/platform/devices/*.ufs/attributes/exception_event_control
Date:		February 2018
Contact:	Stanislav Nijnikov <[e-mail]>
Description:	This file provides the exception event control UFS device
		attribute. The full information about the attribute could
		be found at UFS specifications 2.1.

		The file is read only.

What:		/sys/bus/platform/drivers/ufshcd/*/attributes/exception_event_status
What:		/sys/bus/platform/devices/*.ufs/attributes/exception_event_status
Date:		February 2018
Contact:	Stanislav Nijnikov <[e-mail]>
Description:	This file provides the exception event status UFS device
		attribute. The full information about the attribute could
		be found at UFS specifications 2.1.

		The file is read only.

What:		/sys/bus/platform/drivers/ufshcd/*/attributes/ffu_status
What:		/sys/bus/platform/devices/*.ufs/attributes/ffu_status
Date:		February 2018
Contact:	Stanislav Nijnikov <[e-mail]>
Description:	This file provides the ffu status UFS device attribute.
		The full information about the attribute could be found at
		UFS specifications 2.1.

		The file is read only.

What:		/sys/bus/platform/drivers/ufshcd/*/attributes/psa_state
What:		/sys/bus/platform/devices/*.ufs/attributes/psa_state
Date:		February 2018
Contact:	Stanislav Nijnikov <[e-mail]>
Description:	This file show the PSA feature status. The full information
		about the attribute could be found at UFS specifications 2.1.

		The file is read only.

What:		/sys/bus/platform/drivers/ufshcd/*/attributes/psa_data_size
What:		/sys/bus/platform/devices/*.ufs/attributes/psa_data_size
Date:		February 2018
Contact:	Stanislav Nijnikov <[e-mail]>
Description:	This file shows the amount of data that the host plans to
		load to all logical units in pre-soldering state.
		The full information about the attribute could be found at
		UFS specifications 2.1.

		The file is read only.


What:		/sys/class/scsi_device/*/device/dyn_cap_needed
Date:		February 2018
Contact:	Stanislav Nijnikov <[e-mail]>
Description:	This file shows the amount of physical memory needed
		to be removed from the physical memory resources pool of
		the particular logical unit. The full information about
		the attribute could be found at UFS specifications 2.1.

		The file is read only.


What:		/sys/bus/platform/drivers/ufshcd/*/rpm_lvl
What:		/sys/bus/platform/devices/*.ufs/rpm_lvl
Date:		September 2014
Contact:	Can Guo <[e-mail]>
Description:	This entry could be used to set or show the UFS device
		runtime power management level. The current driver
		implementation supports 7 levels with next target states:

		==  ====================================================
		0   UFS device will stay active, UIC link will
		    stay active
		1   UFS device will stay active, UIC link will
		    hibernate
		2   UFS device will be moved to sleep, UIC link will
		    stay active
		3   UFS device will be moved to sleep, UIC link will
		    hibernate
		4   UFS device will be powered off, UIC link will
		    hibernate
		5   UFS device will be powered off, UIC link will
		    be powered off
		6   UFS device will be moved to deep sleep, UIC link
		    will be powered off. Note, deep sleep might not be
		    supported in which case this value will not be
		    accepted
		==  ====================================================

What:		/sys/bus/platform/drivers/ufshcd/*/rpm_target_dev_state
What:		/sys/bus/platform/devices/*.ufs/rpm_target_dev_state
Date:		February 2018
Contact:	Can Guo <[e-mail]>
Description:	This entry shows the target power mode of an UFS device
		for the chosen runtime power management level.

		The file is read only.

What:		/sys/bus/platform/drivers/ufshcd/*/rpm_target_link_state
What:		/sys/bus/platform/devices/*.ufs/rpm_target_link_state
Date:		February 2018
Contact:	Can Guo <[e-mail]>
Description:	This entry shows the target state of an UFS UIC link
		for the chosen runtime power management level.

		The file is read only.

What:		/sys/bus/platform/drivers/ufshcd/*/spm_lvl
What:		/sys/bus/platform/devices/*.ufs/spm_lvl
Date:		September 2014
Contact:	Can Guo <[e-mail]>
Description:	This entry could be used to set or show the UFS device
		system power management level. The current driver
		implementation supports 7 levels with next target states:

		==  ====================================================
		0   UFS device will stay active, UIC link will
		    stay active
		1   UFS device will stay active, UIC link will
		    hibernate
		2   UFS device will be moved to sleep, UIC link will
		    stay active
		3   UFS device will be moved to sleep, UIC link will
		    hibernate
		4   UFS device will be powered off, UIC link will
		    hibernate
		5   UFS device will be powered off, UIC link will
		    be powered off
		6   UFS device will be moved to deep sleep, UIC link
		    will be powered off. Note, deep sleep might not be
		    supported in which case this value will not be
		    accepted
		==  ====================================================

What:		/sys/bus/platform/drivers/ufshcd/*/spm_target_dev_state
What:		/sys/bus/platform/devices/*.ufs/spm_target_dev_state
Date:		February 2018
Contact:	Can Guo <[e-mail]>
Description:	This entry shows the target power mode of an UFS device
		for the chosen system power management level.

		The file is read only.

What:		/sys/bus/platform/drivers/ufshcd/*/spm_target_link_state
What:		/sys/bus/platform/devices/*.ufs/spm_target_link_state
Date:		February 2018
Contact:	Can Guo <[e-mail]>
Description:	This entry shows the target state of an UFS UIC link
		for the chosen system power management level.

		The file is read only.

What:		/sys/bus/platform/drivers/ufshcd/*/monitor/monitor_enable
What:		/sys/bus/platform/devices/*.ufs/monitor/monitor_enable
Date:		January 2021
Contact:	Can Guo <[e-mail]>
Description:	This file shows the status of performance monitor enablement
		and it can be used to start/stop the monitor. When the monitor
		is stopped, the performance data collected is also cleared.

What:		/sys/bus/platform/drivers/ufshcd/*/monitor/monitor_chunk_size
What:		/sys/bus/platform/devices/*.ufs/monitor/monitor_chunk_size
Date:		January 2021
Contact:	Can Guo <[e-mail]>
Description:	This file tells the monitor to focus on requests transferring
		data of specific chunk size (in Bytes). 0 means any chunk size.
		It can only be changed when monitor is disabled.

What:		/sys/bus/platform/drivers/ufshcd/*/monitor/read_total_sectors
What:		/sys/bus/platform/devices/*.ufs/monitor/read_total_sectors
Date:		January 2021
Contact:	Can Guo <[e-mail]>
Description:	This file shows how many sectors (in 512 Bytes) have been
		sent from device to host after monitor gets started.

		The file is read only.

What:		/sys/bus/platform/drivers/ufshcd/*/monitor/read_total_busy
What:		/sys/bus/platform/devices/*.ufs/monitor/read_total_busy
Date:		January 2021
Contact:	Can Guo <[e-mail]>
Description:	This file shows how long (in micro seconds) has been spent
		sending data from device to host after monitor gets started.

		The file is read only.

What:		/sys/bus/platform/drivers/ufshcd/*/monitor/read_nr_requests
What:		/sys/bus/platform/devices/*.ufs/monitor/read_nr_requests
Date:		January 2021
Contact:	Can Guo <[e-mail]>
Description:	This file shows how many read requests have been sent after
		monitor gets started.

		The file is read only.

What:		/sys/bus/platform/drivers/ufshcd/*/monitor/read_req_latency_max
What:		/sys/bus/platform/devices/*.ufs/monitor/read_req_latency_max
Date:		January 2021
Contact:	Can Guo <[e-mail]>
Description:	This file shows the maximum latency (in micro seconds) of
		read requests after monitor gets started.

		The file is read only.

What:		/sys/bus/platform/drivers/ufshcd/*/monitor/read_req_latency_min
What:		/sys/bus/platform/devices/*.ufs/monitor/read_req_latency_min
Date:		January 2021
Contact:	Can Guo <[e-mail]>
Description:	This file shows the minimum latency (in micro seconds) of
		read requests after monitor gets started.

		The file is read only.

What:		/sys/bus/platform/drivers/ufshcd/*/monitor/read_req_latency_avg
What:		/sys/bus/platform/devices/*.ufs/monitor/read_req_latency_avg
Date:		January 2021
Contact:	Can Guo <[e-mail]>
Description:	This file shows the average latency (in micro seconds) of
		read requests after monitor gets started.

		The file is read only.

What:		/sys/bus/platform/drivers/ufshcd/*/monitor/read_req_latency_sum
What:		/sys/bus/platform/devices/*.ufs/monitor/read_req_latency_sum
Date:		January 2021
Contact:	Can Guo <[e-mail]>
Description:	This file shows the total latency (in micro seconds) of
		read requests sent after monitor gets started.

		The file is read only.

What:		/sys/bus/platform/drivers/ufshcd/*/monitor/write_total_sectors
What:		/sys/bus/platform/devices/*.ufs/monitor/write_total_sectors
Date:		January 2021
Contact:	Can Guo <[e-mail]>
Description:	This file shows how many sectors (in 512 Bytes) have been sent
		from host to device after monitor gets started.

		The file is read only.

What:		/sys/bus/platform/drivers/ufshcd/*/monitor/write_total_busy
What:		/sys/bus/platform/devices/*.ufs/monitor/write_total_busy
Date:		January 2021
Contact:	Can Guo <[e-mail]>
Description:	This file shows how long (in micro seconds) has been spent
		sending data from host to device after monitor gets started.

		The file is read only.

What:		/sys/bus/platform/drivers/ufshcd/*/monitor/write_nr_requests
What:		/sys/bus/platform/devices/*.ufs/monitor/write_nr_requests
Date:		January 2021
Contact:	Can Guo <[e-mail]>
Description:	This file shows how many write requests have been sent after
		monitor gets started.

		The file is read only.

What:		/sys/bus/platform/drivers/ufshcd/*/monitor/write_req_latency_max
What:		/sys/bus/platform/devices/*.ufs/monitor/write_req_latency_max
Date:		January 2021
Contact:	Can Guo <[e-mail]>
Description:	This file shows the maximum latency (in micro seconds) of write
		requests after monitor gets started.

		The file is read only.

What:		/sys/bus/platform/drivers/ufshcd/*/monitor/write_req_latency_min
What:		/sys/bus/platform/devices/*.ufs/monitor/write_req_latency_min
Date:		January 2021
Contact:	Can Guo <[e-mail]>
Description:	This file shows the minimum latency (in micro seconds) of write
		requests after monitor gets started.

		The file is read only.

What:		/sys/bus/platform/drivers/ufshcd/*/monitor/write_req_latency_avg
What:		/sys/bus/platform/devices/*.ufs/monitor/write_req_latency_avg
Date:		January 2021
Contact:	Can Guo <[e-mail]>
Description:	This file shows the average latency (in micro seconds) of write
		requests after monitor gets started.

		The file is read only.

What:		/sys/bus/platform/drivers/ufshcd/*/monitor/write_req_latency_sum
What:		/sys/bus/platform/devices/*.ufs/monitor/write_req_latency_sum
Date:		January 2021
Contact:	Can Guo <[e-mail]>
Description:	This file shows the total latency (in micro seconds) of write
		requests after monitor gets started.

		The file is read only.

What:		/sys/bus/platform/drivers/ufshcd/*/power_info/lane
What:		/sys/bus/platform/devices/*.ufs/power_info/lane
Date:		September 2023
Contact:	Can Guo <[e-mail]>
Description:	This file shows how many lanes are enabled on the UFS link,
		i.e., an output 2 means UFS link is operating with 2 lanes.

		The file is read only.

What:		/sys/bus/platform/drivers/ufshcd/*/power_info/mode
What:		/sys/bus/platform/devices/*.ufs/power_info/mode
Date:		September 2023
Contact:	Can Guo <[e-mail]>
Description:	This file shows the PA power mode of UFS.

		The file is read only.

What:		/sys/bus/platform/drivers/ufshcd/*/power_info/rate
What:		/sys/bus/platform/devices/*.ufs/power_info/rate
Date:		September 2023
Contact:	Can Guo <[e-mail]>
Description:	This file shows the speed rate of UFS link.

		The file is read only.

What:		/sys/bus/platform/drivers/ufshcd/*/power_info/gear
What:		/sys/bus/platform/devices/*.ufs/power_info/gear
Date:		September 2023
Contact:	Can Guo <[e-mail]>
Description:	This file shows the gear of UFS link.

		The file is read only.

What:		/sys/bus/platform/drivers/ufshcd/*/power_info/dev_pm
What:		/sys/bus/platform/devices/*.ufs/power_info/dev_pm
Date:		September 2023
Contact:	Can Guo <[e-mail]>
Description:	This file shows the UFS device power mode.

		The file is read only.

What:		/sys/bus/platform/drivers/ufshcd/*/power_info/link_state
What:		/sys/bus/platform/devices/*.ufs/power_info/link_state
Date:		September 2023
Contact:	Can Guo <[e-mail]>
Description:	This file shows the state of UFS link.

		The file is read only.

What:		/sys/bus/platform/drivers/ufshcd/*/device_descriptor/wb_presv_us_en
What:		/sys/bus/platform/devices/*.ufs/device_descriptor/wb_presv_us_en
Date:		June 2020
Contact:	Asutosh Das <[e-mail]>
Description:	This entry shows if preserve user-space was configured

		The file is read only.

What:		/sys/bus/platform/drivers/ufshcd/*/device_descriptor/wb_shared_alloc_units
What:		/sys/bus/platform/devices/*.ufs/device_descriptor/wb_shared_alloc_units
Date:		June 2020
Contact:	Asutosh Das <[e-mail]>
Description:	This entry shows the shared allocated units of WB buffer

		The file is read only.

What:		/sys/bus/platform/drivers/ufshcd/*/device_descriptor/wb_type
What:		/sys/bus/platform/devices/*.ufs/device_descriptor/wb_type
Date:		June 2020
Contact:	Asutosh Das <[e-mail]>
Description:	This entry shows the configured WB type.
		0x1 for shared buffer mode. 0x0 for dedicated buffer mode.

		The file is read only.

What:		/sys/bus/platform/drivers/ufshcd/*/geometry_descriptor/wb_buff_cap_adj
What:		/sys/bus/platform/devices/*.ufs/geometry_descriptor/wb_buff_cap_adj
Date:		June 2020
Contact:	Asutosh Das <[e-mail]>
Description:	This entry shows the total user-space decrease in shared
		buffer mode.
		The value of this parameter is 3 for TLC NAND when SLC mode
		is used as WriteBooster Buffer. 2 for MLC NAND.

		The file is read only.

What:		/sys/bus/platform/drivers/ufshcd/*/geometry_descriptor/wb_max_alloc_units
What:		/sys/bus/platform/devices/*.ufs/geometry_descriptor/wb_max_alloc_units
Date:		June 2020
Contact:	Asutosh Das <[e-mail]>
Description:	This entry shows the Maximum total WriteBooster Buffer size
		which is supported by the entire device.

		The file is read only.

What:		/sys/bus/platform/drivers/ufshcd/*/geometry_descriptor/wb_max_wb_luns
What:		/sys/bus/platform/devices/*.ufs/geometry_descriptor/wb_max_wb_luns
Date:		June 2020
Contact:	Asutosh Das <[e-mail]>
Description:	This entry shows the maximum number of luns that can support
		WriteBooster.

		The file is read only.

What:		/sys/bus/platform/drivers/ufshcd/*/geometry_descriptor/wb_sup_red_type
What:		/sys/bus/platform/devices/*.ufs/geometry_descriptor/wb_sup_red_type
Date:		June 2020
Contact:	Asutosh Das <[e-mail]>
Description:	The supportability of user space reduction mode
		and preserve user space mode.
		00h: WriteBooster Buffer can be configured only in
		user space reduction type.
		01h: WriteBooster Buffer can be configured only in
		preserve user space type.
		02h: Device can be configured in either user space
		reduction type or preserve user space type.

		The file is read only.

What:		/sys/bus/platform/drivers/ufshcd/*/geometry_descriptor/wb_sup_wb_type
What:		/sys/bus/platform/devices/*.ufs/geometry_descriptor/wb_sup_wb_type
Date:		June 2020
Contact:	Asutosh Das <[e-mail]>
Description:	The supportability of WriteBooster Buffer type.

		===  ==========================================================
		00h  LU based WriteBooster Buffer configuration
		01h  Single shared WriteBooster Buffer configuration
		02h  Supporting both LU based WriteBooster.
		     Buffer and Single shared WriteBooster Buffer configuration
		===  ==========================================================

		The file is read only.

What:		/sys/bus/platform/drivers/ufshcd/*/flags/wb_enable
What:		/sys/bus/platform/devices/*.ufs/flags/wb_enable
Date:		June 2020
Contact:	Asutosh Das <[e-mail]>
Description:	This entry shows the status of WriteBooster.

		== ============================
		0  WriteBooster is not enabled.
		1  WriteBooster is enabled
		== ============================

		The file is read only.

What:		/sys/bus/platform/drivers/ufshcd/*/flags/wb_flush_en
What:		/sys/bus/platform/devices/*.ufs/flags/wb_flush_en
Date:		June 2020
Contact:	Asutosh Das <[e-mail]>
Description:	This entry shows if flush is enabled.

		== =================================
		0  Flush operation is not performed.
		1  Flush operation is performed.
		== =================================

		The file is read only.

What:		/sys/bus/platform/drivers/ufshcd/*/flags/wb_flush_during_h8
What:		/sys/bus/platform/devices/*.ufs/flags/wb_flush_during_h8
Date:		June 2020
Contact:	Asutosh Das <[e-mail]>
Description:	Flush WriteBooster Buffer during hibernate state.

		== =================================================
		0  Device is not allowed to flush the
		   WriteBooster Buffer during link hibernate state.
		1  Device is allowed to flush the
		   WriteBooster Buffer during link hibernate state.
		== =================================================

		The file is read only.

What:		/sys/bus/platform/drivers/ufshcd/*/attributes/wb_avail_buf
What:		/sys/bus/platform/devices/*.ufs/attributes/wb_avail_buf
Date:		June 2020
Contact:	Asutosh Das <[e-mail]>
Description:	This entry shows the amount of unused WriteBooster buffer
		available.

		The file is read only.

What:		/sys/bus/platform/drivers/ufshcd/*/attributes/wb_cur_buf
What:		/sys/bus/platform/devices/*.ufs/attributes/wb_cur_buf
Date:		June 2020
Contact:	Asutosh Das <[e-mail]>
Description:	This entry shows the amount of unused current buffer.

		The file is read only.

What:		/sys/bus/platform/drivers/ufshcd/*/attributes/wb_flush_status
What:		/sys/bus/platform/devices/*.ufs/attributes/wb_flush_status
Date:		June 2020
Contact:	Asutosh Das <[e-mail]>
Description:	This entry shows the flush operation status.


		===  ======================================
		00h  idle
		01h  Flush operation in progress
		02h  Flush operation stopped prematurely.
		03h  Flush operation completed successfully
		04h  Flush operation general failure
		===  ======================================

		The file is read only.

What:		/sys/bus/platform/drivers/ufshcd/*/attributes/wb_life_time_est
What:		/sys/bus/platform/devices/*.ufs/attributes/wb_life_time_est
Date:		June 2020
Contact:	Asutosh Das <[e-mail]>
Description:	This entry shows an indication of the WriteBooster Buffer
		lifetime based on the amount of performed program/erase cycles

		===  =============================================
		01h  0% - 10% WriteBooster Buffer life time used
		...
		0Ah  90% - 100% WriteBooster Buffer life time used
		===  =============================================

		The file is read only.

What:		/sys/class/scsi_device/*/device/unit_descriptor/wb_buf_alloc_units
Date:		June 2020
Contact:	Asutosh Das <[e-mail]>
Description:	This entry shows the configured size of WriteBooster buffer.
		0400h corresponds to 4GB.

		The file is read only.

What:		/sys/bus/platform/drivers/ufshcd/*/wb_on
What:		/sys/bus/platform/devices/*.ufs/wb_on
Date:		January 2021
Contact:	Bean Huo <[e-mail]>
Description:	This node is used to set or display whether UFS WriteBooster is
		enabled. Echo 0 to this file to disable UFS WriteBooster or 1 to
		enable it. The WriteBooster is enabled after power-on/reset,
		however, it will be disabled/enable while CLK scaling down/up
		(if the platform supports UFSHCD_CAP_CLK_SCALING). For a
		platform that doesn't support UFSHCD_CAP_CLK_SCALING, we can
		disable/enable WriteBooster through this sysfs node.

What:		/sys/bus/platform/drivers/ufshcd/*/enable_wb_buf_flush
What:		/sys/bus/platform/devices/*.ufs/enable_wb_buf_flush
Date:		July 2022
Contact:	Jinyoung Choi <[e-mail]>
Description:	This entry shows the status of WriteBooster buffer flushing
		and it can be used to enable or disable the flushing.
		If flushing is enabled, the device executes the flush
		operation when the command queue is empty.

What:		/sys/bus/platform/drivers/ufshcd/*/wb_flush_threshold
What:		/sys/bus/platform/devices/*.ufs/wb_flush_threshold
Date:		June 2023
Contact:	Lu Hongfei <[e-mail]>
Description:
		wb_flush_threshold represents the threshold for flushing WriteBooster buffer,
		whose value expressed in unit of 10% granularity, such as '1' representing 10%,
		'2' representing 20%, and so on.
		If avail_wb_buff < wb_flush_threshold, it indicates that WriteBooster buffer needs to
		be flushed, otherwise it is not necessary.

Contact:	Daniil Lunev <[e-mail]>
What:		/sys/bus/platform/drivers/ufshcd/*/capabilities/
What:		/sys/bus/platform/devices/*.ufs/capabilities/
Date:		August 2022
Description:	The group represents the effective capabilities of the
		host-device pair. i.e. the capabilities which are enabled in the
		driver for the specific host controller, supported by the host
		controller and are supported and/or have compatible
		configuration on the device side.

Contact:	Daniil Lunev <[e-mail]>
What:		/sys/bus/platform/drivers/ufshcd/*/capabilities/clock_scaling
What:		/sys/bus/platform/devices/*.ufs/capabilities/clock_scaling
Date:		August 2022
Contact:	Daniil Lunev <[e-mail]>
Description:	Indicates status of clock scaling.

		== ============================
		0  Clock scaling is not supported.
		1  Clock scaling is supported.
		== ============================

		The file is read only.

What:		/sys/bus/platform/drivers/ufshcd/*/capabilities/write_booster
What:		/sys/bus/platform/devices/*.ufs/capabilities/write_booster
Date:		August 2022
Contact:	Daniil Lunev <[e-mail]>
Description:	Indicates status of Write Booster.

		== ============================
		0  Write Booster can not be enabled.
		1  Write Booster can be enabled.
		== ============================

		The file is read only.

What:		/sys/bus/platform/drivers/ufshcd/*/rtc_update_ms
What:		/sys/bus/platform/devices/*.ufs/rtc_update_ms
Date:		November 2023
Contact:	Bean Huo <[e-mail]>
Description:
		rtc_update_ms indicates how often the host should synchronize or update the
		UFS RTC. If set to 0, this will disable UFS RTC periodic update.

What:		/sys/devices/platform/.../ufshci_capabilities/version
Date:		August 2024
Contact:	Avri Altman <[e-mail]>
Description:
		Host Capabilities register group: UFS version register.
		Symbol - VER.  This file shows the UFSHCD version.
		Example: Version 3.12 would be represented as 0000_0312h.
		The file is read only.

What:		/sys/devices/platform/.../ufshci_capabilities/product_id
Date:		August 2024
Contact:	Avri Altman <[e-mail]>
Description:
		Host Capabilities register group: product ID register.
		Symbol - HCPID.  This file shows the UFSHCD product id.
		The content of this register is vendor specific.
		The file is read only.

What:		/sys/devices/platform/.../ufshci_capabilities/man_id
Date:		August 2024
Contact:	Avri Altman <[e-mail]>
Description:
		Host Capabilities register group: manufacturer ID register.
		Symbol - HCMID. This file shows the UFSHCD manufacturer id.
		The Manufacturer ID is defined by JEDEC in JEDEC-JEP106.
		The file is read only.

What:		/sys/bus/platform/drivers/ufshcd/*/critical_health
What:		/sys/bus/platform/devices/*.ufs/critical_health
Date:		February 2025
Contact:	Avri Altman <[e-mail]>
Description:	Report the number of times a critical health event has been
		reported by a UFS device. Further insight into the specific
		issue can be gained by reading one of: bPreEOLInfo,
		bDeviceLifeTimeEstA, bDeviceLifeTimeEstB,
		bWriteBoosterBufferLifeTimeEst, and bRPMBLifeTimeEst.

		The file is read only.

What:		/sys/bus/platform/drivers/ufshcd/*/clkscale_enable
What:		/sys/bus/platform/devices/*.ufs/clkscale_enable
Date:		January 2025
Contact:	Ziqi Chen <[e-mail]>
Description:
		This attribute shows whether the UFS clock scaling is enabled or not.
		And it can be used to enable/disable the clock scaling by writing
		1 or 0 to this attribute.

		The attribute is read/write.

What:		/sys/bus/platform/drivers/ufshcd/*/clkgate_enable
What:		/sys/bus/platform/devices/*.ufs/clkgate_enable
Date:		January 2025
Contact:	Ziqi Chen <[e-mail]>
Description:
		This attribute shows whether the UFS clock gating is enabled or not.
		And it can be used to enable/disable the clock gating by writing
		1 or 0 to this attribute.

		The attribute is read/write.

What:		/sys/bus/platform/drivers/ufshcd/*/clkgate_delay_ms
What:		/sys/bus/platform/devices/*.ufs/clkgate_delay_ms
Date:		January 2025
Contact:	Ziqi Chen <[e-mail]>
Description:
		This attribute shows and sets the number of milliseconds of idle time
		before the UFS driver starts to perform clock gating. This can
		prevent the UFS from frequently performing clock gating/ungating.

		The attribute is read/write.

What:		/sys/bus/platform/drivers/ufshcd/*/device_lvl_exception_count
What:		/sys/bus/platform/devices/*.ufs/device_lvl_exception_count
Date:		March 2025
Contact:	Bao D. Nguyen <[e-mail]>
Description:
		This attribute is applicable to ufs devices compliant to the
		JEDEC specifications version 4.1 or later. The
		device_lvl_exception_count is a counter indicating the number of
		times the device level exceptions have occurred since the last
		time this variable is reset.  Writing a 0 value to this
		attribute will reset the device_lvl_exception_count.  If the
		device_lvl_exception_count reads a positive value, the user
		application should read the device_lvl_exception_id attribute to
		know more information about the exception.

		The attribute is read/write.

What:		/sys/bus/platform/drivers/ufshcd/*/device_lvl_exception_id
What:		/sys/bus/platform/devices/*.ufs/device_lvl_exception_id
Date:		March 2025
Contact:	Bao D. Nguyen <[e-mail]>
Description:
		Reading the device_lvl_exception_id returns the
		qDeviceLevelExceptionID attribute of the ufs device JEDEC
		specification version 4.1. The definition of the
		qDeviceLevelExceptionID is the ufs device vendor specific
		implementation.  Refer to the device manufacturer datasheet for
		more information on the meaning of the qDeviceLevelExceptionID
		attribute value.

		The attribute is read only.

What:		/sys/bus/platform/drivers/ufshcd/*/wb_resize_enable
What:		/sys/bus/platform/devices/*.ufs/wb_resize_enable
Date:		April 2025
Contact:	Huan Tang <[e-mail]>
Description:
		The host can enable the WriteBooster buffer resize by setting this
		attribute.

		========  ======================================
		idle      There is no resize operation
		decrease  Decrease WriteBooster buffer size
		increase  Increase WriteBooster buffer size
		========  ======================================

		The file is write only.

What:		/sys/bus/platform/drivers/ufshcd/*/attributes/wb_resize_hint
What:		/sys/bus/platform/devices/*.ufs/attributes/wb_resize_hint
Date:		April 2025
Contact:	Huan Tang <[e-mail]>
Description:
		wb_resize_hint indicates hint information about which type of resize
		for WriteBooster buffer is recommended by the device.

		=========  ======================================
		keep       Recommend keep the buffer size
		decrease   Recommend to decrease the buffer size
		increase   Recommend to increase the buffer size
		=========  ======================================

		The file is read only.

What:		/sys/bus/platform/drivers/ufshcd/*/attributes/wb_resize_status
What:		/sys/bus/platform/devices/*.ufs/attributes/wb_resize_status
Date:		April 2025
Contact:	Huan Tang <[e-mail]>
Description:
		The host can check the resize operation status of the WriteBooster
		buffer by reading this attribute.

		================  ========================================
		idle              Resize operation is not issued
		in_progress       Resize operation in progress
		complete_success  Resize operation completed successfully
		general_failure   Resize operation general failure
		================  ========================================

		The file is read only.

What:		/sys/bus/platform/drivers/ufshcd/*/hid/analysis_trigger
What:		/sys/bus/platform/devices/*.ufs/hid/analysis_trigger
Date:		May 2025
Contact:	Huan Tang <[e-mail]>
Description:
		The host can enable or disable HID analysis operation.

		=======  =========================================
		disable   disable HID analysis operation
		enable    enable HID analysis operation
		=======  =========================================

		The file is write only.

What:		/sys/bus/platform/drivers/ufshcd/*/hid/defrag_trigger
What:		/sys/bus/platform/devices/*.ufs/hid/defrag_trigger
Date:		May 2025
Contact:	Huan Tang <[e-mail]>
Description:
		The host can enable or disable HID defragmentation operation.

		=======  =========================================
		disable   disable HID defragmentation operation
		enable    enable HID defragmentation operation
		=======  =========================================

		The attribute is write only.

What:		/sys/bus/platform/drivers/ufshcd/*/hid/fragmented_size
What:		/sys/bus/platform/devices/*.ufs/hid/fragmented_size
Date:		May 2025
Contact:	Huan Tang <[e-mail]>
Description:
		The total fragmented size in the device is reported through
		this attribute.

		The attribute is read only.

What:		/sys/bus/platform/drivers/ufshcd/*/hid/defrag_size
What:		/sys/bus/platform/devices/*.ufs/hid/defrag_size
Date:		May 2025
Contact:	Huan Tang <[e-mail]>
Description:
		The host sets the size to be defragmented by an HID
		defragmentation operation.

		The attribute is read/write.

What:		/sys/bus/platform/drivers/ufshcd/*/hid/progress_ratio
What:		/sys/bus/platform/devices/*.ufs/hid/progress_ratio
Date:		May 2025
Contact:	Huan Tang <[e-mail]>
Description:
		Defragmentation progress is reported by this attribute,
		indicates the ratio of the completed defragmentation size
		over the requested defragmentation size.

		====  ============================================
		1     1%
		...
		100   100%
		====  ============================================

		The attribute is read only.

What:		/sys/bus/platform/drivers/ufshcd/*/hid/state
What:		/sys/bus/platform/devices/*.ufs/hid/state
Date:		May 2025
Contact:	Huan Tang <[e-mail]>
Description:
		The HID state is reported by this attribute.

		====================   ===========================
		idle			Idle (analysis required)
		analysis_in_progress    Analysis in progress
		defrag_required      	Defrag required
		defrag_in_progress      Defrag in progress
		defrag_completed      	Defrag completed
		defrag_not_required     Defrag is not required
		====================   ===========================

		The attribute is read only.