1What: /sys/bus/dsa/devices/dsa<m>/version 2Date: Apr 15, 2020 3KernelVersion: 5.8.0 4Contact: dmaengine@vger.kernel.org 5Description: The hardware version number. 6 7What: /sys/bus/dsa/devices/dsa<m>/cdev_major 8Date: Oct 25, 2019 9KernelVersion: 5.6.0 10Contact: dmaengine@vger.kernel.org 11Description: The major number that the character device driver assigned to 12 this device. 13 14What: /sys/bus/dsa/devices/dsa<m>/errors 15Date: Oct 25, 2019 16KernelVersion: 5.6.0 17Contact: dmaengine@vger.kernel.org 18Description: The error information for this device. 19 20What: /sys/bus/dsa/devices/dsa<m>/max_batch_size 21Date: Oct 25, 2019 22KernelVersion: 5.6.0 23Contact: dmaengine@vger.kernel.org 24Description: The largest number of work descriptors in a batch. 25 26What: /sys/bus/dsa/devices/dsa<m>/max_work_queues_size 27Date: Oct 25, 2019 28KernelVersion: 5.6.0 29Contact: dmaengine@vger.kernel.org 30Description: The maximum work queue size supported by this device. 31 32What: /sys/bus/dsa/devices/dsa<m>/max_engines 33Date: Oct 25, 2019 34KernelVersion: 5.6.0 35Contact: dmaengine@vger.kernel.org 36Description: The maximum number of engines supported by this device. 37 38What: /sys/bus/dsa/devices/dsa<m>/max_groups 39Date: Oct 25, 2019 40KernelVersion: 5.6.0 41Contact: dmaengine@vger.kernel.org 42Description: The maximum number of groups can be created under this device. 43 44What: /sys/bus/dsa/devices/dsa<m>/max_tokens 45Date: Oct 25, 2019 46KernelVersion: 5.6.0 47Contact: dmaengine@vger.kernel.org 48Description: The total number of bandwidth tokens supported by this device. 49 The bandwidth tokens represent resources within the DSA 50 implementation, and these resources are allocated by engines to 51 support operations. 52 53What: /sys/bus/dsa/devices/dsa<m>/max_transfer_size 54Date: Oct 25, 2019 55KernelVersion: 5.6.0 56Contact: dmaengine@vger.kernel.org 57Description: The number of bytes to be read from the source address to 58 perform the operation. The maximum transfer size is dependent on 59 the workqueue the descriptor was submitted to. 60 61What: /sys/bus/dsa/devices/dsa<m>/max_work_queues 62Date: Oct 25, 2019 63KernelVersion: 5.6.0 64Contact: dmaengine@vger.kernel.org 65Description: The maximum work queue number that this device supports. 66 67What: /sys/bus/dsa/devices/dsa<m>/numa_node 68Date: Oct 25, 2019 69KernelVersion: 5.6.0 70Contact: dmaengine@vger.kernel.org 71Description: The numa node number for this device. 72 73What: /sys/bus/dsa/devices/dsa<m>/op_cap 74Date: Oct 25, 2019 75KernelVersion: 5.6.0 76Contact: dmaengine@vger.kernel.org 77Description: The operation capability bit mask specify the operation types 78 supported by the this device. 79 80What: /sys/bus/dsa/devices/dsa<m>/pasid_enabled 81Date: Oct 27, 2020 82KernelVersion: 5.11.0 83Contact: dmaengine@vger.kernel.org 84Description: To indicate if PASID (process address space identifier) is 85 enabled or not for this device. 86 87What: /sys/bus/dsa/devices/dsa<m>/state 88Date: Oct 25, 2019 89KernelVersion: 5.6.0 90Contact: dmaengine@vger.kernel.org 91Description: The state information of this device. It can be either enabled 92 or disabled. 93 94What: /sys/bus/dsa/devices/dsa<m>/group<m>.<n> 95Date: Oct 25, 2019 96KernelVersion: 5.6.0 97Contact: dmaengine@vger.kernel.org 98Description: The assigned group under this device. 99 100What: /sys/bus/dsa/devices/dsa<m>/engine<m>.<n> 101Date: Oct 25, 2019 102KernelVersion: 5.6.0 103Contact: dmaengine@vger.kernel.org 104Description: The assigned engine under this device. 105 106What: /sys/bus/dsa/devices/dsa<m>/wq<m>.<n> 107Date: Oct 25, 2019 108KernelVersion: 5.6.0 109Contact: dmaengine@vger.kernel.org 110Description: The assigned work queue under this device. 111 112What: /sys/bus/dsa/devices/dsa<m>/configurable 113Date: Oct 25, 2019 114KernelVersion: 5.6.0 115Contact: dmaengine@vger.kernel.org 116Description: To indicate if this device is configurable or not. 117 118What: /sys/bus/dsa/devices/dsa<m>/token_limit 119Date: Oct 25, 2019 120KernelVersion: 5.6.0 121Contact: dmaengine@vger.kernel.org 122Description: The maximum number of bandwidth tokens that may be in use at 123 one time by operations that access low bandwidth memory in the 124 device. 125 126What: /sys/bus/dsa/devices/dsa<m>/cmd_status 127Date: Aug 28, 2020 128KernelVersion: 5.10.0 129Contact: dmaengine@vger.kernel.org 130Description: The last executed device administrative command's status/error. 131 132What: /sys/bus/dsa/devices/wq<m>.<n>/block_on_fault 133Date: Oct 27, 2020 134KernelVersion: 5.11.0 135Contact: dmaengine@vger.kernel.org 136Description: To indicate block on fault is allowed or not for the work queue 137 to support on demand paging. 138 139What: /sys/bus/dsa/devices/wq<m>.<n>/group_id 140Date: Oct 25, 2019 141KernelVersion: 5.6.0 142Contact: dmaengine@vger.kernel.org 143Description: The group id that this work queue belongs to. 144 145What: /sys/bus/dsa/devices/wq<m>.<n>/size 146Date: Oct 25, 2019 147KernelVersion: 5.6.0 148Contact: dmaengine@vger.kernel.org 149Description: The work queue size for this work queue. 150 151What: /sys/bus/dsa/devices/wq<m>.<n>/type 152Date: Oct 25, 2019 153KernelVersion: 5.6.0 154Contact: dmaengine@vger.kernel.org 155Description: The type of this work queue, it can be "kernel" type for work 156 queue usages in the kernel space or "user" type for work queue 157 usages by applications in user space. 158 159What: /sys/bus/dsa/devices/wq<m>.<n>/cdev_minor 160Date: Oct 25, 2019 161KernelVersion: 5.6.0 162Contact: dmaengine@vger.kernel.org 163Description: The minor number assigned to this work queue by the character 164 device driver. 165 166What: /sys/bus/dsa/devices/wq<m>.<n>/mode 167Date: Oct 25, 2019 168KernelVersion: 5.6.0 169Contact: dmaengine@vger.kernel.org 170Description: The work queue mode type for this work queue. 171 172What: /sys/bus/dsa/devices/wq<m>.<n>/priority 173Date: Oct 25, 2019 174KernelVersion: 5.6.0 175Contact: dmaengine@vger.kernel.org 176Description: The priority value of this work queue, it is a value relative to 177 other work queue in the same group to control quality of service 178 for dispatching work from multiple workqueues in the same group. 179 180What: /sys/bus/dsa/devices/wq<m>.<n>/state 181Date: Oct 25, 2019 182KernelVersion: 5.6.0 183Contact: dmaengine@vger.kernel.org 184Description: The current state of the work queue. 185 186What: /sys/bus/dsa/devices/wq<m>.<n>/threshold 187Date: Oct 25, 2019 188KernelVersion: 5.6.0 189Contact: dmaengine@vger.kernel.org 190Description: The number of entries in this work queue that may be filled 191 via a limited portal. 192 193What: /sys/bus/dsa/devices/wq<m>.<n>/max_transfer_size 194Date: Aug 28, 2020 195KernelVersion: 5.10.0 196Contact: dmaengine@vger.kernel.org 197Description: The max transfer sized for this workqueue. Cannot exceed device 198 max transfer size. Configurable parameter. 199 200What: /sys/bus/dsa/devices/wq<m>.<n>/max_batch_size 201Date: Aug 28, 2020 202KernelVersion: 5.10.0 203Contact: dmaengine@vger.kernel.org 204Description: The max batch size for this workqueue. Cannot exceed device 205 max batch size. Configurable parameter. 206 207What: /sys/bus/dsa/devices/wq<m>.<n>/ats_disable 208Date: Nov 13, 2020 209KernelVersion: 5.11.0 210Contact: dmaengine@vger.kernel.org 211Description: Indicate whether ATS disable is turned on for the workqueue. 212 0 indicates ATS is on, and 1 indicates ATS is off for the workqueue. 213 214What: /sys/bus/dsa/devices/wq<m>.<n>/occupancy 215Date May 25, 2021 216KernelVersion: 5.14.0 217Contact: dmaengine@vger.kernel.org 218Description: Show the current number of entries in this WQ if WQ Occupancy 219 Support bit WQ capabilities is 1. 220 221What: /sys/bus/dsa/devices/engine<m>.<n>/group_id 222Date: Oct 25, 2019 223KernelVersion: 5.6.0 224Contact: dmaengine@vger.kernel.org 225Description: The group that this engine belongs to. 226