scsi: ufs: sysfs: unit descriptor

This patch introduces a sysfs group entry for the UFS unit descriptor
parameters. The group adds "unit_descriptor" folder under the corresponding
SCSI device sysfs entry (/sys/class/scsi_device/*/device/). 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>

1 files changed, 108 insertions, 0 deletions

diff --git a/Documentation/ABI/testing/sysfs-driver-ufs b/Documentation/ABI/testing/sysfs-driver-ufs
index c17a9685048b..57c6a9028108 100644
--- a/Documentation/ABI/testing/sysfs-driver-ufs
+++ b/Documentation/ABI/testing/sysfs-driver-ufs
@@ -490,3 +490,111 @@ 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 <stanislav.nijnikov@wdc.com>
+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 <stanislav.nijnikov@wdc.com>
+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 <stanislav.nijnikov@wdc.com>
+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 <stanislav.nijnikov@wdc.com>
+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 <stanislav.nijnikov@wdc.com>
+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 <stanislav.nijnikov@wdc.com>
+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 <stanislav.nijnikov@wdc.com>
+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 <stanislav.nijnikov@wdc.com>
+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 <stanislav.nijnikov@wdc.com>
+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 <stanislav.nijnikov@wdc.com>
+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_resourse_count
+Date:		February 2018
+Contact:	Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
+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 <stanislav.nijnikov@wdc.com>
+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 <stanislav.nijnikov@wdc.com>
+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.