Documentation/ABI/stable/sysfs-driver-dma-idxd

   1 What:           /sys/bus/dsa/devices/dsa<m>/version
   2 Date:           Apr 15, 2020
   3 KernelVersion:  5.8.0
   4 Contact:        dmaengine@vger.kernel.org
   5 Description:    The hardware version number.
   6
   7 What:           /sys/bus/dsa/devices/dsa<m>/cdev_major
   8 Date:           Oct 25, 2019
   9 KernelVersion:  5.6.0
  10 Contact:        dmaengine@vger.kernel.org
  11 Description:    The major number that the character device driver assigned to
  12                 this device.
  13
  14 What:           /sys/bus/dsa/devices/dsa<m>/errors
  15 Date:           Oct 25, 2019
  16 KernelVersion:  5.6.0
  17 Contact:        dmaengine@vger.kernel.org
  18 Description:    The error information for this device.
  19
  20 What:           /sys/bus/dsa/devices/dsa<m>/max_batch_size
  21 Date:           Oct 25, 2019
  22 KernelVersion:  5.6.0
  23 Contact:        dmaengine@vger.kernel.org
  24 Description:    The largest number of work descriptors in a batch.
  25
  26 What:           /sys/bus/dsa/devices/dsa<m>/max_work_queues_size
  27 Date:           Oct 25, 2019
  28 KernelVersion:  5.6.0
  29 Contact:        dmaengine@vger.kernel.org
  30 Description:    The maximum work queue size supported by this device.
  31
  32 What:           /sys/bus/dsa/devices/dsa<m>/max_engines
  33 Date:           Oct 25, 2019
  34 KernelVersion:  5.6.0
  35 Contact:        dmaengine@vger.kernel.org
  36 Description:    The maximum number of engines supported by this device.
  37
  38 What:           /sys/bus/dsa/devices/dsa<m>/max_groups
  39 Date:           Oct 25, 2019
  40 KernelVersion:  5.6.0
  41 Contact:        dmaengine@vger.kernel.org
  42 Description:    The maximum number of groups can be created under this device.
  43
  44 What:           /sys/bus/dsa/devices/dsa<m>/max_tokens
  45 Date:           Oct 25, 2019
  46 KernelVersion:  5.6.0
  47 Contact:        dmaengine@vger.kernel.org
  48 Description:    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
  53 What:           /sys/bus/dsa/devices/dsa<m>/max_transfer_size
  54 Date:           Oct 25, 2019
  55 KernelVersion:  5.6.0
  56 Contact:        dmaengine@vger.kernel.org
  57 Description:    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
  61 What:           /sys/bus/dsa/devices/dsa<m>/max_work_queues
  62 Date:           Oct 25, 2019
  63 KernelVersion:  5.6.0
  64 Contact:        dmaengine@vger.kernel.org
  65 Description:    The maximum work queue number that this device supports.
  66
  67 What:           /sys/bus/dsa/devices/dsa<m>/numa_node
  68 Date:           Oct 25, 2019
  69 KernelVersion:  5.6.0
  70 Contact:        dmaengine@vger.kernel.org
  71 Description:    The numa node number for this device.
  72
  73 What:           /sys/bus/dsa/devices/dsa<m>/op_cap
  74 Date:           Oct 25, 2019
  75 KernelVersion:  5.6.0
  76 Contact:        dmaengine@vger.kernel.org
  77 Description:    The operation capability bit mask specify the operation types
  78                 supported by the this device.
  79
  80 What:           /sys/bus/dsa/devices/dsa<m>/state
  81 Date:           Oct 25, 2019
  82 KernelVersion:  5.6.0
  83 Contact:        dmaengine@vger.kernel.org
  84 Description:    The state information of this device. It can be either enabled
  85                 or disabled.
  86
  87 What:           /sys/bus/dsa/devices/dsa<m>/group<m>.<n>
  88 Date:           Oct 25, 2019
  89 KernelVersion:  5.6.0
  90 Contact:        dmaengine@vger.kernel.org
  91 Description:    The assigned group under this device.
  92
  93 What:           /sys/bus/dsa/devices/dsa<m>/engine<m>.<n>
  94 Date:           Oct 25, 2019
  95 KernelVersion:  5.6.0
  96 Contact:        dmaengine@vger.kernel.org
  97 Description:    The assigned engine under this device.
  98
  99 What:           /sys/bus/dsa/devices/dsa<m>/wq<m>.<n>
 100 Date:           Oct 25, 2019
 101 KernelVersion:  5.6.0
 102 Contact:        dmaengine@vger.kernel.org
 103 Description:    The assigned work queue under this device.
 104
 105 What:           /sys/bus/dsa/devices/dsa<m>/configurable
 106 Date:           Oct 25, 2019
 107 KernelVersion:  5.6.0
 108 Contact:        dmaengine@vger.kernel.org
 109 Description:    To indicate if this device is configurable or not.
 110
 111 What:           /sys/bus/dsa/devices/dsa<m>/token_limit
 112 Date:           Oct 25, 2019
 113 KernelVersion:  5.6.0
 114 Contact:        dmaengine@vger.kernel.org
 115 Description:    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
 119 What:           /sys/bus/dsa/devices/dsa<m>/cmd_status
 120 Date:           Aug 28, 2020
 121 KernelVersion:  5.10.0
 122 Contact:        dmaengine@vger.kernel.org
 123 Description:    The last executed device administrative command's status/error.
 124
 125 What:           /sys/bus/dsa/devices/wq<m>.<n>/group_id
 126 Date:           Oct 25, 2019
 127 KernelVersion:  5.6.0
 128 Contact:        dmaengine@vger.kernel.org
 129 Description:    The group id that this work queue belongs to.
 130
 131 What:           /sys/bus/dsa/devices/wq<m>.<n>/size
 132 Date:           Oct 25, 2019
 133 KernelVersion:  5.6.0
 134 Contact:        dmaengine@vger.kernel.org
 135 Description:    The work queue size for this work queue.
 136
 137 What:           /sys/bus/dsa/devices/wq<m>.<n>/type
 138 Date:           Oct 25, 2019
 139 KernelVersion:  5.6.0
 140 Contact:        dmaengine@vger.kernel.org
 141 Description:    The type of this work queue, it can be "kernel" type for work
 142                 queue usages in the kernel space or "user" type for work queue
 143                 usages by applications in user space.
 144
 145 What:           /sys/bus/dsa/devices/wq<m>.<n>/cdev_minor
 146 Date:           Oct 25, 2019
 147 KernelVersion:  5.6.0
 148 Contact:        dmaengine@vger.kernel.org
 149 Description:    The minor number assigned to this work queue by the character
 150                 device driver.
 151
 152 What:           /sys/bus/dsa/devices/wq<m>.<n>/mode
 153 Date:           Oct 25, 2019
 154 KernelVersion:  5.6.0
 155 Contact:        dmaengine@vger.kernel.org
 156 Description:    The work queue mode type for this work queue.
 157
 158 What:           /sys/bus/dsa/devices/wq<m>.<n>/priority
 159 Date:           Oct 25, 2019
 160 KernelVersion:  5.6.0
 161 Contact:        dmaengine@vger.kernel.org
 162 Description:    The priority value of this work queue, it is a vlue relative to
 163                 other work queue in the same group to control quality of service
 164                 for dispatching work from multiple workqueues in the same group.
 165
 166 What:           /sys/bus/dsa/devices/wq<m>.<n>/state
 167 Date:           Oct 25, 2019
 168 KernelVersion:  5.6.0
 169 Contact:        dmaengine@vger.kernel.org
 170 Description:    The current state of the work queue.
 171
 172 What:           /sys/bus/dsa/devices/wq<m>.<n>/threshold
 173 Date:           Oct 25, 2019
 174 KernelVersion:  5.6.0
 175 Contact:        dmaengine@vger.kernel.org
 176 Description:    The number of entries in this work queue that may be filled
 177                 via a limited portal.
 178
 179 What:           /sys/bus/dsa/devices/wq<m>.<n>/max_transfer_size
 180 Date:           Aug 28, 2020
 181 KernelVersion:  5.10.0
 182 Contact:        dmaengine@vger.kernel.org
 183 Description:    The max transfer sized for this workqueue. Cannot exceed device
 184                 max transfer size. Configurable parameter.
 185
 186 What:           /sys/bus/dsa/devices/wq<m>.<n>/max_batch_size
 187 Date:           Aug 28, 2020
 188 KernelVersion:  5.10.0
 189 Contact:        dmaengine@vger.kernel.org
 190 Description:    The max batch size for this workqueue. Cannot exceed device
 191                 max batch size. Configurable parameter.
 192
 193 What:           /sys/bus/dsa/devices/engine<m>.<n>/group_id
 194 Date:           Oct 25, 2019
 195 KernelVersion:  5.6.0
 196 Contact:        dmaengine@vger.kernel.org
 197 Description:    The group that this engine belongs to.