Documentation/ABI/testing/sysfs-driver-qat

   1 What:           /sys/bus/pci/devices/<BDF>/qat/state
   2 Date:           June 2022
   3 KernelVersion:  5.20
   4 Contact:        qat-linux@intel.com
   5 Description:    (RW) Reports the current state of the QAT device. Write to
   6                 the file to start or stop the device.
   7
   8                 The values are:
   9
  10                 * up: the device is up and running
  11                 * down: the device is down
  12
  13
  14                 It is possible to transition the device from up to down only
  15                 if the device is up and vice versa.
  16
  17                 This attribute is only available for qat_4xxx devices.
  18
  19 What:           /sys/bus/pci/devices/<BDF>/qat/cfg_services
  20 Date:           June 2022
  21 KernelVersion:  5.20
  22 Contact:        qat-linux@intel.com
  23 Description:    (RW) Reports the current configuration of the QAT device.
  24                 Write to the file to change the configured services.
  25
  26                 The values are:
  27
  28                 * sym;asym: the device is configured for running crypto
  29                   services
  30                 * dc: the device is configured for running compression services
  31
  32                 It is possible to set the configuration only if the device
  33                 is in the `down` state (see /sys/bus/pci/devices/<BDF>/qat/state)
  34
  35                 The following example shows how to change the configuration of
  36                 a device configured for running crypto services in order to
  37                 run data compression::
  38
  39                         # cat /sys/bus/pci/devices/<BDF>/qat/state
  40                         up
  41                         # cat /sys/bus/pci/devices/<BDF>/qat/cfg_services
  42                         sym;asym
  43                         # echo down > /sys/bus/pci/devices/<BDF>/qat/state
  44                         # echo dc > /sys/bus/pci/devices/<BDF>/qat/cfg_services
  45                         # echo up > /sys/bus/pci/devices/<BDF>/qat/state
  46                         # cat /sys/bus/pci/devices/<BDF>/qat/cfg_services
  47                         dc
  48
  49                 This attribute is only available for qat_4xxx devices.