144 lines
4.5 KiB
Plaintext
144 lines
4.5 KiB
Plaintext
What: /sys/bus/pci/devices/<BDF>/qat/state
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Date: June 2022
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KernelVersion: 6.0
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Contact: qat-linux@intel.com
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Description: (RW) Reports the current state of the QAT device. Write to
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the file to start or stop the device.
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The values are:
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* up: the device is up and running
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* down: the device is down
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It is possible to transition the device from up to down only
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if the device is up and vice versa.
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This attribute is only available for qat_4xxx devices.
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What: /sys/bus/pci/devices/<BDF>/qat/cfg_services
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Date: June 2022
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KernelVersion: 6.0
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Contact: qat-linux@intel.com
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Description: (RW) Reports the current configuration of the QAT device.
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Write to the file to change the configured services.
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The values are:
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* sym;asym: the device is configured for running crypto
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services
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* asym;sym: identical to sym;asym
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* dc: the device is configured for running compression services
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* dcc: identical to dc but enables the dc chaining feature,
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hash then compression. If this is not required chose dc
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* sym: the device is configured for running symmetric crypto
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services
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* asym: the device is configured for running asymmetric crypto
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services
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* asym;dc: the device is configured for running asymmetric
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crypto services and compression services
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* dc;asym: identical to asym;dc
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* sym;dc: the device is configured for running symmetric crypto
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services and compression services
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* dc;sym: identical to sym;dc
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It is possible to set the configuration only if the device
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is in the `down` state (see /sys/bus/pci/devices/<BDF>/qat/state)
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The following example shows how to change the configuration of
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a device configured for running crypto services in order to
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run data compression::
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# cat /sys/bus/pci/devices/<BDF>/qat/state
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up
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# cat /sys/bus/pci/devices/<BDF>/qat/cfg_services
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sym;asym
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# echo down > /sys/bus/pci/devices/<BDF>/qat/state
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# echo dc > /sys/bus/pci/devices/<BDF>/qat/cfg_services
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# echo up > /sys/bus/pci/devices/<BDF>/qat/state
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# cat /sys/bus/pci/devices/<BDF>/qat/cfg_services
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dc
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This attribute is only available for qat_4xxx devices.
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What: /sys/bus/pci/devices/<BDF>/qat/pm_idle_enabled
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Date: June 2023
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KernelVersion: 6.5
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Contact: qat-linux@intel.com
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Description: (RW) This configuration option provides a way to force the device into remaining in
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the MAX power state.
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If idle support is enabled the device will transition to the `MIN` power state when
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idle, otherwise will stay in the MAX power state.
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Write to the file to enable or disable idle support.
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The values are:
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* 0: idle support is disabled
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* 1: idle support is enabled
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Default value is 1.
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It is possible to set the pm_idle_enabled value only if the device
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is in the `down` state (see /sys/bus/pci/devices/<BDF>/qat/state)
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The following example shows how to change the pm_idle_enabled of
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a device::
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# cat /sys/bus/pci/devices/<BDF>/qat/state
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up
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# cat /sys/bus/pci/devices/<BDF>/qat/pm_idle_enabled
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1
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# echo down > /sys/bus/pci/devices/<BDF>/qat/state
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# echo 0 > /sys/bus/pci/devices/<BDF>/qat/pm_idle_enabled
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# echo up > /sys/bus/pci/devices/<BDF>/qat/state
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# cat /sys/bus/pci/devices/<BDF>/qat/pm_idle_enabled
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0
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This attribute is only available for qat_4xxx devices.
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What: /sys/bus/pci/devices/<BDF>/qat/rp2srv
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Date: January 2024
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KernelVersion: 6.7
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Contact: qat-linux@intel.com
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Description:
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(RW) This attribute provides a way for a user to query a
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specific ring pair for the type of service that it is currently
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configured for.
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When written to, the value is cached and used to perform the
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read operation. Allowed values are in the range 0 to N-1, where
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N is the max number of ring pairs supported by a device. This
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can be queried using the attribute qat/num_rps.
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A read returns the service associated to the ring pair queried.
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The values are:
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* dc: the ring pair is configured for running compression services
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* sym: the ring pair is configured for running symmetric crypto
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services
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* asym: the ring pair is configured for running asymmetric crypto
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services
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Example usage::
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# echo 1 > /sys/bus/pci/devices/<BDF>/qat/rp2srv
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# cat /sys/bus/pci/devices/<BDF>/qat/rp2srv
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sym
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This attribute is only available for qat_4xxx devices.
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What: /sys/bus/pci/devices/<BDF>/qat/num_rps
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Date: January 2024
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KernelVersion: 6.7
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Contact: qat-linux@intel.com
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Description:
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(RO) Returns the number of ring pairs that a single device has.
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Example usage::
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# cat /sys/bus/pci/devices/<BDF>/qat/num_rps
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64
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This attribute is only available for qat_4xxx devices.
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