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>/state 81Date: Oct 25, 2019 82KernelVersion: 5.6.0 83Contact: dmaengine@vger.kernel.org 84Description: The state information of this device. It can be either enabled 85 or disabled. 86 87What: /sys/bus/dsa/devices/dsa<m>/group<m>.<n> 88Date: Oct 25, 2019 89KernelVersion: 5.6.0 90Contact: dmaengine@vger.kernel.org 91Description: The assigned group under this device. 92 93What: /sys/bus/dsa/devices/dsa<m>/engine<m>.<n> 94Date: Oct 25, 2019 95KernelVersion: 5.6.0 96Contact: dmaengine@vger.kernel.org 97Description: The assigned engine under this device. 98 99What: /sys/bus/dsa/devices/dsa<m>/wq<m>.<n> 100Date: Oct 25, 2019 101KernelVersion: 5.6.0 102Contact: dmaengine@vger.kernel.org 103Description: The assigned work queue under this device. 104 105What: /sys/bus/dsa/devices/dsa<m>/configurable 106Date: Oct 25, 2019 107KernelVersion: 5.6.0 108Contact: dmaengine@vger.kernel.org 109Description: To indicate if this device is configurable or not. 110 111What: /sys/bus/dsa/devices/dsa<m>/token_limit 112Date: Oct 25, 2019 113KernelVersion: 5.6.0 114Contact: dmaengine@vger.kernel.org 115Description: The maximum number of bandwidth tokens that may be in use at 116 one time by operations that access low bandwidth memory in the 117 device. 118 119What: /sys/bus/dsa/devices/wq<m>.<n>/group_id 120Date: Oct 25, 2019 121KernelVersion: 5.6.0 122Contact: dmaengine@vger.kernel.org 123Description: The group id that this work queue belongs to. 124 125What: /sys/bus/dsa/devices/wq<m>.<n>/size 126Date: Oct 25, 2019 127KernelVersion: 5.6.0 128Contact: dmaengine@vger.kernel.org 129Description: The work queue size for this work queue. 130 131What: /sys/bus/dsa/devices/wq<m>.<n>/type 132Date: Oct 25, 2019 133KernelVersion: 5.6.0 134Contact: dmaengine@vger.kernel.org 135Description: The type of this work queue, it can be "kernel" type for work 136 queue usages in the kernel space or "user" type for work queue 137 usages by applications in user space. 138 139What: /sys/bus/dsa/devices/wq<m>.<n>/cdev_minor 140Date: Oct 25, 2019 141KernelVersion: 5.6.0 142Contact: dmaengine@vger.kernel.org 143Description: The minor number assigned to this work queue by the character 144 device driver. 145 146What: /sys/bus/dsa/devices/wq<m>.<n>/mode 147Date: Oct 25, 2019 148KernelVersion: 5.6.0 149Contact: dmaengine@vger.kernel.org 150Description: The work queue mode type for this work queue. 151 152What: /sys/bus/dsa/devices/wq<m>.<n>/priority 153Date: Oct 25, 2019 154KernelVersion: 5.6.0 155Contact: dmaengine@vger.kernel.org 156Description: The priority value of this work queue, it is a vlue relative to 157 other work queue in the same group to control quality of service 158 for dispatching work from multiple workqueues in the same group. 159 160What: /sys/bus/dsa/devices/wq<m>.<n>/state 161Date: Oct 25, 2019 162KernelVersion: 5.6.0 163Contact: dmaengine@vger.kernel.org 164Description: The current state of the work queue. 165 166What: /sys/bus/dsa/devices/wq<m>.<n>/threshold 167Date: Oct 25, 2019 168KernelVersion: 5.6.0 169Contact: dmaengine@vger.kernel.org 170Description: The number of entries in this work queue that may be filled 171 via a limited portal. 172 173What: /sys/bus/dsa/devices/wq<m>.<n>/max_transfer_size 174Date: Aug 28, 2020 175KernelVersion: 5.10.0 176Contact: dmaengine@vger.kernel.org 177Description: The max transfer sized for this workqueue. Cannot exceed device 178 max transfer size. Configurable parameter. 179 180What: /sys/bus/dsa/devices/wq<m>.<n>/max_batch_size 181Date: Aug 28, 2020 182KernelVersion: 5.10.0 183Contact: dmaengine@vger.kernel.org 184Description: The max batch size for this workqueue. Cannot exceed device 185 max batch size. Configurable parameter. 186 187What: /sys/bus/dsa/devices/engine<m>.<n>/group_id 188Date: Oct 25, 2019 189KernelVersion: 5.6.0 190Contact: dmaengine@vger.kernel.org 191Description: The group that this engine belongs to. 192