diff options
Diffstat (limited to 'Documentation/ABI/testing/sysfs-driver-qat')
| -rw-r--r-- | Documentation/ABI/testing/sysfs-driver-qat | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-driver-qat b/Documentation/ABI/testing/sysfs-driver-qat index 087842b1969e..ef6d6c57105e 100644 --- a/Documentation/ABI/testing/sysfs-driver-qat +++ b/Documentation/ABI/testing/sysfs-driver-qat @@ -27,7 +27,18 @@ Description: (RW) Reports the current configuration of the QAT device. * 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) @@ -47,3 +58,38 @@ Description: (RW) Reports the current configuration of the QAT device. 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. |