>
> Adds sysfs documentation for WriteBooster entries.
>
> Signed-off-by: Asutosh Das
Acked-by: Avri Altman
Maybe insert each field following the fields of the same descriptor,
attributes, flags etc.
Thanks,
Avri
> ---
> Documentation/ABI/testing/sysfs-driver-ufs | 136
> +
> 1 file changed, 136 insertions(+)
>
> diff --git a/Documentation/ABI/testing/sysfs-driver-ufs
> b/Documentation/ABI/testing/sysfs-driver-ufs
> index 016724e..d1a3521 100644
> --- a/Documentation/ABI/testing/sysfs-driver-ufs
> +++ b/Documentation/ABI/testing/sysfs-driver-ufs
> @@ -883,3 +883,139 @@ Contact: Subhash Jadavani
>
> 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/*/device_descriptor/wb_presv_us_en
> +Date: June 2020
> +Contact: Asutosh Das
> +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
> +Date: June 2020
> +Contact: Asutosh Das
> +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
> +Date: June 2020
> +Contact: Asutosh Das
> +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
> +Date: June 2020
> +Contact: Asutosh Das
> +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_unit
> s
> +Date: June 2020
> +Contact: Asutosh Das
> +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
> +Date: June 2020
> +Contact: Asutosh Das
> +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
> +Date: June 2020
> +Contact: Asutosh Das
> +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
> +Date: June 2020
> +Contact: Asutosh Das
> +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
> +Date: June 2020
> +Contact: Asutosh Das
> +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
> +Date: June 2020
> +Contact: Asutosh Das
> +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
> +Date: June 2020
> +Contact: Asutosh Das
> +Description: Flush WriteBooster Buffer during hibernate state.
> + 0: Device is not allowed to flush the
> + WriteBooster Buffer during link hibernate
> + state.
> + 1: Device is
