1 What: /sys/bus/pci/devices/<BDF>/qat/state 2 Date: June 2022 3 KernelVersion: 6.0 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: 6.0 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 * asym;sym: identical to sym;asym 31 * dc: the device is configured for running compression services 32 * dcc: identical to dc but enables the dc chaining feature, 33 hash then compression. If this is not required chose dc 34 * sym: the device is configured for running symmetric crypto 35 services 36 * asym: the device is configured for running asymmetric crypto 37 services 38 * asym;dc: the device is configured for running asymmetric 39 crypto services and compression services 40 * dc;asym: identical to asym;dc 41 * sym;dc: the device is configured for running symmetric crypto 42 services and compression services 43 * dc;sym: identical to sym;dc 44 45 It is possible to set the configuration only if the device 46 is in the `down` state (see /sys/bus/pci/devices/<BDF>/qat/state) 47 48 The following example shows how to change the configuration of 49 a device configured for running crypto services in order to 50 run data compression:: 51 52 # cat /sys/bus/pci/devices/<BDF>/qat/state 53 up 54 # cat /sys/bus/pci/devices/<BDF>/qat/cfg_services 55 sym;asym 56 # echo down > /sys/bus/pci/devices/<BDF>/qat/state 57 # echo dc > /sys/bus/pci/devices/<BDF>/qat/cfg_services 58 # echo up > /sys/bus/pci/devices/<BDF>/qat/state 59 # cat /sys/bus/pci/devices/<BDF>/qat/cfg_services 60 dc 61 62 This attribute is only available for qat_4xxx devices. 63 64 What: /sys/bus/pci/devices/<BDF>/qat/pm_idle_enabled 65 Date: June 2023 66 KernelVersion: 6.5 67 Contact: qat-linux@intel.com 68 Description: (RW) This configuration option provides a way to force the device into remaining in 69 the MAX power state. 70 If idle support is enabled the device will transition to the `MIN` power state when 71 idle, otherwise will stay in the MAX power state. 72 Write to the file to enable or disable idle support. 73 74 The values are: 75 76 * 0: idle support is disabled 77 * 1: idle support is enabled 78 79 Default value is 1. 80 81 It is possible to set the pm_idle_enabled value only if the device 82 is in the `down` state (see /sys/bus/pci/devices/<BDF>/qat/state) 83 84 The following example shows how to change the pm_idle_enabled of 85 a device:: 86 87 # cat /sys/bus/pci/devices/<BDF>/qat/state 88 up 89 # cat /sys/bus/pci/devices/<BDF>/qat/pm_idle_enabled 90 1 91 # echo down > /sys/bus/pci/devices/<BDF>/qat/state 92 # echo 0 > /sys/bus/pci/devices/<BDF>/qat/pm_idle_enabled 93 # echo up > /sys/bus/pci/devices/<BDF>/qat/state 94 # cat /sys/bus/pci/devices/<BDF>/qat/pm_idle_enabled 95 0 96 97 This attribute is only available for qat_4xxx devices. 98 99 What: /sys/bus/pci/devices/<BDF>/qat/rp2srv 100 Date: January 2024 101 KernelVersion: 6.7 102 Contact: qat-linux@intel.com 103 Description: 104 (RW) This attribute provides a way for a user to query a 105 specific ring pair for the type of service that it is currently 106 configured for. 107 108 When written to, the value is cached and used to perform the 109 read operation. Allowed values are in the range 0 to N-1, where 110 N is the max number of ring pairs supported by a device. This 111 can be queried using the attribute qat/num_rps. 112 113 A read returns the service associated to the ring pair queried. 114 115 The values are: 116 117 * dc: the ring pair is configured for running compression services 118 * sym: the ring pair is configured for running symmetric crypto 119 services 120 * asym: the ring pair is configured for running asymmetric crypto 121 services 122 123 Example usage:: 124 125 # echo 1 > /sys/bus/pci/devices/<BDF>/qat/rp2srv 126 # cat /sys/bus/pci/devices/<BDF>/qat/rp2srv 127 sym 128 129 This attribute is only available for qat_4xxx devices. 130 131 What: /sys/bus/pci/devices/<BDF>/qat/num_rps 132 Date: January 2024 133 KernelVersion: 6.7 134 Contact: qat-linux@intel.com 135 Description: 136 (RO) Returns the number of ring pairs that a single device has. 137 138 Example usage:: 139 140 # cat /sys/bus/pci/devices/<BDF>/qat/num_rps 141 64 142 143 This attribute is only available for qat_4xxx devices. 144 145 What: /sys/bus/pci/devices/<BDF>/qat/auto_reset 146 Date: May 2024 147 KernelVersion: 6.9 148 Contact: qat-linux@intel.com 149 Description: (RW) Reports the current state of the autoreset feature 150 for a QAT device 151 152 Write to the attribute to enable or disable device auto reset. 153 154 Device auto reset is disabled by default. 155 156 The values are: 157 158 * 1/Yy/on: auto reset enabled. If the device encounters an 159 unrecoverable error, it will be reset automatically. 160 * 0/Nn/off: auto reset disabled. If the device encounters an 161 unrecoverable error, it will not be reset. 162 163 This attribute is only available for qat_4xxx devices.
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