linux/Documentation/ABI/testing/sysfs-driver-qat

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What: /sys/bus/pci/devices/<BDF>/qat/state
Date: June 2022
KernelVersion: 5.20
Contact: qat-linux@intel.com
Description: Reports the current state of the QAT device and allows to
change it.
This attribute is RW.
Returned values:
up: the device is up and running
down: the device is down
Allowed values:
up: initialize and start the device
down: stop the device and bring it down
It is possible to transition the device from up to down only
if the device is up and vice versa.
This attribute is only available for qat_4xxx devices.