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df60f9c645
Add support for the ATA feature control sub-page of the control mode page to enable/disable the command duration limits feature using the cdl_ctrl field of the ATA feature control sub-page. Both mode sense and mode select translation are supported. For mode sense, the ata device flag ATA_DFLAG_CDL_ENABLED is used to cache the status of the command duration limits feature. Enabling this feature is done using a SET FEATURES command with a cdl action set to 1 when the page cdl_ctrl field value is 0x2 (T2A and T2B pages supported). If this field is 0, CDL is disabled using the SET FEATURES command with a cdl action set to 0. Since a device CDL and NCQ priority features should not be used simultaneously, ata_mselect_control_ata_feature() returns an error when attempting to enable CDL with the device priority feature enabled. Conversely, the function ata_ncq_prio_enable_store() used to enable the use of the device NCQ priority feature through sysfs is modified to return an error if the device CDL feature is enabled. Signed-off-by: Damien Le Moal <dlemoal@kernel.org> Reviewed-by: Hannes Reinecke <hare@suse.de> Co-developed-by: Niklas Cassel <niklas.cassel@wdc.com> Signed-off-by: Niklas Cassel <niklas.cassel@wdc.com> Link: https://lore.kernel.org/r/20230511011356.227789-18-nks@flawful.org Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.