tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1What: /sys/bus/pci/devices/<BDF>/qat/state
2Date: June 2022
3KernelVersion: 6.0
4Contact: qat-linux@intel.com
5Description: (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
19What: /sys/bus/pci/devices/<BDF>/qat/cfg_services
20Date: June 2022
21KernelVersion: 6.0
22Contact: qat-linux@intel.com
23Description: (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.