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>/pasid_enabled
  81 Date:           Oct 27, 2020
  82 KernelVersion:  5.11.0
  83 Contact:        dmaengine@vger.kernel.org
  84 Description:    To indicate if PASID (process address space identifier) is
  85                 enabled or not for this device.
  86
  87 What:           /sys/bus/dsa/devices/dsa<m>/state
  88 Date:           Oct 25, 2019
  89 KernelVersion:  5.6.0
  90 Contact:        dmaengine@vger.kernel.org
  91 Description:    The state information of this device. It can be either enabled
  92                 or disabled.
  93
  94 What:           /sys/bus/dsa/devices/dsa<m>/group<m>.<n>
  95 Date:           Oct 25, 2019
  96 KernelVersion:  5.6.0
  97 Contact:        dmaengine@vger.kernel.org
  98 Description:    The assigned group under this device.
  99
 100 What:           /sys/bus/dsa/devices/dsa<m>/engine<m>.<n>
 101 Date:           Oct 25, 2019
 102 KernelVersion:  5.6.0
 103 Contact:        dmaengine@vger.kernel.org
 104 Description:    The assigned engine under this device.
 105
 106 What:           /sys/bus/dsa/devices/dsa<m>/wq<m>.<n>
 107 Date:           Oct 25, 2019
 108 KernelVersion:  5.6.0
 109 Contact:        dmaengine@vger.kernel.org
 110 Description:    The assigned work queue under this device.
 111
 112 What:           /sys/bus/dsa/devices/dsa<m>/configurable
 113 Date:           Oct 25, 2019
 114 KernelVersion:  5.6.0
 115 Contact:        dmaengine@vger.kernel.org
 116 Description:    To indicate if this device is configurable or not.
 117
 118 What:           /sys/bus/dsa/devices/dsa<m>/token_limit
 119 Date:           Oct 25, 2019
 120 KernelVersion:  5.6.0
 121 Contact:        dmaengine@vger.kernel.org
 122 Description:    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
 126 What:           /sys/bus/dsa/devices/dsa<m>/cmd_status
 127 Date:           Aug 28, 2020
 128 KernelVersion:  5.10.0
 129 Contact:        dmaengine@vger.kernel.org
 130 Description:    The last executed device administrative command's status/error.
 131
 132 What:           /sys/bus/dsa/devices/wq<m>.<n>/block_on_fault
 133 Date:           Oct 27, 2020
 134 KernelVersion:  5.11.0
 135 Contact:        dmaengine@vger.kernel.org
 136 Description:    To indicate block on fault is allowed or not for the work queue
 137                 to support on demand paging.
 138
 139 What:           /sys/bus/dsa/devices/wq<m>.<n>/group_id
 140 Date:           Oct 25, 2019
 141 KernelVersion:  5.6.0
 142 Contact:        dmaengine@vger.kernel.org
 143 Description:    The group id that this work queue belongs to.
 144
 145 What:           /sys/bus/dsa/devices/wq<m>.<n>/size
 146 Date:           Oct 25, 2019
 147 KernelVersion:  5.6.0
 148 Contact:        dmaengine@vger.kernel.org
 149 Description:    The work queue size for this work queue.
 150
 151 What:           /sys/bus/dsa/devices/wq<m>.<n>/type
 152 Date:           Oct 25, 2019
 153 KernelVersion:  5.6.0
 154 Contact:        dmaengine@vger.kernel.org
 155 Description:    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
 159 What:           /sys/bus/dsa/devices/wq<m>.<n>/cdev_minor
 160 Date:           Oct 25, 2019
 161 KernelVersion:  5.6.0
 162 Contact:        dmaengine@vger.kernel.org
 163 Description:    The minor number assigned to this work queue by the character
 164                 device driver.
 165
 166 What:           /sys/bus/dsa/devices/wq<m>.<n>/mode
 167 Date:           Oct 25, 2019
 168 KernelVersion:  5.6.0
 169 Contact:        dmaengine@vger.kernel.org
 170 Description:    The work queue mode type for this work queue.
 171
 172 What:           /sys/bus/dsa/devices/wq<m>.<n>/priority
 173 Date:           Oct 25, 2019
 174 KernelVersion:  5.6.0
 175 Contact:        dmaengine@vger.kernel.org
 176 Description:    The priority value of this work queue, it is a vlue 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
 180 What:           /sys/bus/dsa/devices/wq<m>.<n>/state
 181 Date:           Oct 25, 2019
 182 KernelVersion:  5.6.0
 183 Contact:        dmaengine@vger.kernel.org
 184 Description:    The current state of the work queue.
 185
 186 What:           /sys/bus/dsa/devices/wq<m>.<n>/threshold
 187 Date:           Oct 25, 2019
 188 KernelVersion:  5.6.0
 189 Contact:        dmaengine@vger.kernel.org
 190 Description:    The number of entries in this work queue that may be filled
 191                 via a limited portal.
 192
 193 What:           /sys/bus/dsa/devices/wq<m>.<n>/max_transfer_size
 194 Date:           Aug 28, 2020
 195 KernelVersion:  5.10.0
 196 Contact:        dmaengine@vger.kernel.org
 197 Description:    The max transfer sized for this workqueue. Cannot exceed device
 198                 max transfer size. Configurable parameter.
 199
 200 What:           /sys/bus/dsa/devices/wq<m>.<n>/max_batch_size
 201 Date:           Aug 28, 2020
 202 KernelVersion:  5.10.0
 203 Contact:        dmaengine@vger.kernel.org
 204 Description:    The max batch size for this workqueue. Cannot exceed device
 205                 max batch size. Configurable parameter.
 206
 207 What:           /sys/bus/dsa/devices/wq<m>.<n>/ats_disable
 208 Date:           Nov 13, 2020
 209 KernelVersion:  5.11.0
 210 Contact:        dmaengine@vger.kernel.org
 211 Description:    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
 214 What:           /sys/bus/dsa/devices/engine<m>.<n>/group_id
 215 Date:           Oct 25, 2019
 216 KernelVersion:  5.6.0
 217 Contact:        dmaengine@vger.kernel.org
 218 Description:    The group that this engine belongs to.