| Message ID | 20210816014456.2191776-11-damien.lemoal@wdc.com |
|---|---|
| State | New |
| Headers | show |
| Series | libata cleanups and improvements | expand |
On 8/16/21 3:44 AM, Damien Le Moal wrote: > From: Niklas Cassel <niklas.cassel@wdc.com> > > NCQ priority is an optional feature of the NCQ feature set and should > not be confused with the NCQ feature set itself. Clarify the > description of the ncq_prio_enable attribute to avoid this confusion. > > Also add the missing documentation for the equivalent > sas_ncq_prio_enable attribute. > > Signed-off-by: Niklas Cassel <niklas.cassel@wdc.com> > Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com> > --- > Documentation/ABI/testing/sysfs-block-device | 20 +++++++++++++++++--- > 1 file changed, 17 insertions(+), 3 deletions(-) > Reviewed-by: Hannes Reinecke <hare@suse.de> Cheers, Hannes
diff --git a/Documentation/ABI/testing/sysfs-block-device b/Documentation/ABI/testing/sysfs-block-device index aa0fb500e3c9..cf1013df4b92 100644 --- a/Documentation/ABI/testing/sysfs-block-device +++ b/Documentation/ABI/testing/sysfs-block-device @@ -55,6 +55,20 @@ Date: Oct, 2016 KernelVersion: v4.10 Contact: linux-ide@vger.kernel.org Description: - (RW) Write to the file to turn on or off the SATA ncq (native - command queueing) support. By default this feature is turned - off. + (RW) Write to the file to turn on or off the SATA NCQ (native + command queueing) priority support. By default this feature is + turned off. If the device does not support the SATA NCQ + priority feature, writing "1" to this file results in an error. + + +What: /sys/block/*/device/sas_ncq_prio_enable +Date: Oct, 2016 +KernelVersion: v4.10 +Contact: linux-ide@vger.kernel.org +Description: + (RW) This is the equivalent of the ncq_prio_enable attribute + file for SATA devices connected to a SAS host-bus-adapter + (HBA) implementing support for the SATA NCQ priority feature. + This file does not exist if the HBA driver does not implement + support for the SATA NCQ priority feature, regardless of the + device support for this feature.