diff options
Diffstat (limited to 'Documentation/ABI/testing/sysfs-driver-ufs')
| -rw-r--r-- | Documentation/ABI/testing/sysfs-driver-ufs | 64 |
1 files changed, 57 insertions, 7 deletions
diff --git a/Documentation/ABI/testing/sysfs-driver-ufs b/Documentation/ABI/testing/sysfs-driver-ufs index a44ef8bfbadf..228aa43e14ed 100644 --- a/Documentation/ABI/testing/sysfs-driver-ufs +++ b/Documentation/ABI/testing/sysfs-driver-ufs @@ -1417,6 +1417,15 @@ Description: This node is used to set or display whether UFS WriteBooster is 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 <j-young.choi@samsung.com> +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/*/device_descriptor/hpb_version What: /sys/bus/platform/devices/*.ufs/device_descriptor/hpb_version Date: June 2021 @@ -1518,7 +1527,7 @@ Description: This entry shows the number of reads that cannot be changed to The file is read only. -What: /sys/class/scsi_device/*/device/hpb_stats/rb_noti_cnt +What: /sys/class/scsi_device/*/device/hpb_stats/rcmd_noti_cnt Date: June 2021 Contact: Daejun Park <daejun7.park@samsung.com> Description: This entry shows the number of response UPIUs that has @@ -1526,19 +1535,23 @@ Description: This entry shows the number of response UPIUs that has The file is read only. -What: /sys/class/scsi_device/*/device/hpb_stats/rb_active_cnt +What: /sys/class/scsi_device/*/device/hpb_stats/rcmd_active_cnt Date: June 2021 Contact: Daejun Park <daejun7.park@samsung.com> -Description: This entry shows the number of active sub-regions recommended by - response UPIUs. +Description: For the HPB device control mode, this entry shows the number of + active sub-regions recommended by response UPIUs. For the HPB host control + mode, this entry shows the number of active sub-regions recommended by the + HPB host control mode heuristic algorithm. The file is read only. -What: /sys/class/scsi_device/*/device/hpb_stats/rb_inactive_cnt +What: /sys/class/scsi_device/*/device/hpb_stats/rcmd_inactive_cnt Date: June 2021 Contact: Daejun Park <daejun7.park@samsung.com> -Description: This entry shows the number of inactive regions recommended by - response UPIUs. +Description: For the HPB device control mode, this entry shows the number of + inactive regions recommended by response UPIUs. For the HPB host control + mode, this entry shows the number of inactive regions recommended by the + HPB host control mode heuristic algorithm. The file is read only. @@ -1587,6 +1600,43 @@ Description: This entry shows the status of HPB. The file is read only. +Contact: Daniil Lunev <dlunev@chromium.org> +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 <dlunev@chromium.org> +What: /sys/bus/platform/drivers/ufshcd/*/capabilities/clock_scaling +What: /sys/bus/platform/devices/*.ufs/capabilities/clock_scaling +Date: August 2022 +Contact: Daniil Lunev <dlunev@chromium.org> +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 <dlunev@chromium.org> +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/class/scsi_device/*/device/hpb_param_sysfs/activation_thld Date: February 2021 Contact: Avri Altman <avri.altman@wdc.com> |