| What: /sys/bus/pci/devices/<BDF>/qat/state |
| Date: June 2022 |
| KernelVersion: 6.0 |
| Contact: qat-linux@intel.com |
| Description: (RW) Reports the current state of the QAT device. Write to |
| the file to start or stop the device. |
| |
| The values are: |
| |
| * up: the device is up and running |
| * down: the device is 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. |
| |
| What: /sys/bus/pci/devices/<BDF>/qat/cfg_services |
| Date: June 2022 |
| KernelVersion: 6.0 |
| Contact: qat-linux@intel.com |
| Description: (RW) Reports the current configuration of the QAT device. |
| Write to the file to change the configured services. |
| |
| The values are: |
| |
| * sym;asym: the device is configured for running crypto |
| services |
| * asym;sym: identical to sym;asym |
| * dc: the device is configured for running compression services |
| * sym: the device is configured for running symmetric crypto |
| services |
| * asym: the device is configured for running asymmetric crypto |
| services |
| * asym;dc: the device is configured for running asymmetric |
| crypto services and compression services |
| * dc;asym: identical to asym;dc |
| * sym;dc: the device is configured for running symmetric crypto |
| services and compression services |
| * dc;sym: identical to sym;dc |
| |
| It is possible to set the configuration only if the device |
| is in the `down` state (see /sys/bus/pci/devices/<BDF>/qat/state) |
| |
| The following example shows how to change the configuration of |
| a device configured for running crypto services in order to |
| run data compression:: |
| |
| # cat /sys/bus/pci/devices/<BDF>/qat/state |
| up |
| # cat /sys/bus/pci/devices/<BDF>/qat/cfg_services |
| sym;asym |
| # echo down > /sys/bus/pci/devices/<BDF>/qat/state |
| # echo dc > /sys/bus/pci/devices/<BDF>/qat/cfg_services |
| # echo up > /sys/bus/pci/devices/<BDF>/qat/state |
| # cat /sys/bus/pci/devices/<BDF>/qat/cfg_services |
| dc |
| |
| This attribute is only available for qat_4xxx devices. |
| |
| What: /sys/bus/pci/devices/<BDF>/qat/pm_idle_enabled |
| Date: June 2023 |
| KernelVersion: 6.5 |
| Contact: qat-linux@intel.com |
| Description: (RW) This configuration option provides a way to force the device into remaining in |
| the MAX power state. |
| If idle support is enabled the device will transition to the `MIN` power state when |
| idle, otherwise will stay in the MAX power state. |
| Write to the file to enable or disable idle support. |
| |
| The values are: |
| |
| * 0: idle support is disabled |
| * 1: idle support is enabled |
| |
| Default value is 1. |
| |
| It is possible to set the pm_idle_enabled value only if the device |
| is in the `down` state (see /sys/bus/pci/devices/<BDF>/qat/state) |
| |
| The following example shows how to change the pm_idle_enabled of |
| a device:: |
| |
| # cat /sys/bus/pci/devices/<BDF>/qat/state |
| up |
| # cat /sys/bus/pci/devices/<BDF>/qat/pm_idle_enabled |
| 1 |
| # echo down > /sys/bus/pci/devices/<BDF>/qat/state |
| # echo 0 > /sys/bus/pci/devices/<BDF>/qat/pm_idle_enabled |
| # echo up > /sys/bus/pci/devices/<BDF>/qat/state |
| # cat /sys/bus/pci/devices/<BDF>/qat/pm_idle_enabled |
| 0 |
| |
| This attribute is only available for qat_4xxx devices. |
