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

   1 What:           sys/bus/dsa/devices/dsa<m>/cdev_major
   2 Date:           Oct 25, 2019
   3 KernelVersion:  5.6.0
   4 Contact:        dmaengine@vger.kernel.org
   5 Description:    The major number that the character device driver assigned to
   6                 this device.
   7
   8 What:           sys/bus/dsa/devices/dsa<m>/errors
   9 Date:           Oct 25, 2019
  10 KernelVersion:  5.6.0
  11 Contact:        dmaengine@vger.kernel.org
  12 Description:    The error information for this device.
  13
  14 What:           sys/bus/dsa/devices/dsa<m>/max_batch_size
  15 Date:           Oct 25, 2019
  16 KernelVersion:  5.6.0
  17 Contact:        dmaengine@vger.kernel.org
  18 Description:    The largest number of work descriptors in a batch.
  19
  20 What:           sys/bus/dsa/devices/dsa<m>/max_work_queues_size
  21 Date:           Oct 25, 2019
  22 KernelVersion:  5.6.0
  23 Contact:        dmaengine@vger.kernel.org
  24 Description:    The maximum work queue size supported by this device.
  25
  26 What:           sys/bus/dsa/devices/dsa<m>/max_engines
  27 Date:           Oct 25, 2019
  28 KernelVersion:  5.6.0
  29 Contact:        dmaengine@vger.kernel.org
  30 Description:    The maximum number of engines supported by this device.
  31
  32 What:           sys/bus/dsa/devices/dsa<m>/max_groups
  33 Date:           Oct 25, 2019
  34 KernelVersion:  5.6.0
  35 Contact:        dmaengine@vger.kernel.org
  36 Description:    The maximum number of groups can be created under this device.
  37
  38 What:           sys/bus/dsa/devices/dsa<m>/max_tokens
  39 Date:           Oct 25, 2019
  40 KernelVersion:  5.6.0
  41 Contact:        dmaengine@vger.kernel.org
  42 Description:    The total number of bandwidth tokens supported by this device.
  43                 The bandwidth tokens represent resources within the DSA
  44                 implementation, and these resources are allocated by engines to
  45                 support operations.
  46
  47 What:           sys/bus/dsa/devices/dsa<m>/max_transfer_size
  48 Date:           Oct 25, 2019
  49 KernelVersion:  5.6.0
  50 Contact:        dmaengine@vger.kernel.org
  51 Description:    The number of bytes to be read from the source address to
  52                 perform the operation. The maximum transfer size is dependent on
  53                 the workqueue the descriptor was submitted to.
  54
  55 What:           sys/bus/dsa/devices/dsa<m>/max_work_queues
  56 Date:           Oct 25, 2019
  57 KernelVersion:  5.6.0
  58 Contact:        dmaengine@vger.kernel.org
  59 Description:    The maximum work queue number that this device supports.
  60
  61 What:           sys/bus/dsa/devices/dsa<m>/numa_node
  62 Date:           Oct 25, 2019
  63 KernelVersion:  5.6.0
  64 Contact:        dmaengine@vger.kernel.org
  65 Description:    The numa node number for this device.
  66
  67 What:           sys/bus/dsa/devices/dsa<m>/op_cap
  68 Date:           Oct 25, 2019
  69 KernelVersion:  5.6.0
  70 Contact:        dmaengine@vger.kernel.org
  71 Description:    The operation capability bit mask specify the operation types
  72                 supported by the this device.
  73
  74 What:           sys/bus/dsa/devices/dsa<m>/state
  75 Date:           Oct 25, 2019
  76 KernelVersion:  5.6.0
  77 Contact:        dmaengine@vger.kernel.org
  78 Description:    The state information of this device. It can be either enabled
  79                 or disabled.
  80
  81 What:           sys/bus/dsa/devices/dsa<m>/group<m>.<n>
  82 Date:           Oct 25, 2019
  83 KernelVersion:  5.6.0
  84 Contact:        dmaengine@vger.kernel.org
  85 Description:    The assigned group under this device.
  86
  87 What:           sys/bus/dsa/devices/dsa<m>/engine<m>.<n>
  88 Date:           Oct 25, 2019
  89 KernelVersion:  5.6.0
  90 Contact:        dmaengine@vger.kernel.org
  91 Description:    The assigned engine under this device.
  92
  93 What:           sys/bus/dsa/devices/dsa<m>/wq<m>.<n>
  94 Date:           Oct 25, 2019
  95 KernelVersion:  5.6.0
  96 Contact:        dmaengine@vger.kernel.org
  97 Description:    The assigned work queue under this device.
  98
  99 What:           sys/bus/dsa/devices/dsa<m>/configurable
 100 Date:           Oct 25, 2019
 101 KernelVersion:  5.6.0
 102 Contact:        dmaengine@vger.kernel.org
 103 Description:    To indicate if this device is configurable or not.
 104
 105 What:           sys/bus/dsa/devices/dsa<m>/token_limit
 106 Date:           Oct 25, 2019
 107 KernelVersion:  5.6.0
 108 Contact:        dmaengine@vger.kernel.org
 109 Description:    The maximum number of bandwidth tokens that may be in use at
 110                 one time by operations that access low bandwidth memory in the
 111                 device.
 112
 113 What:           sys/bus/dsa/devices/wq<m>.<n>/group_id
 114 Date:           Oct 25, 2019
 115 KernelVersion:  5.6.0
 116 Contact:        dmaengine@vger.kernel.org
 117 Description:    The group id that this work queue belongs to.
 118
 119 What:           sys/bus/dsa/devices/wq<m>.<n>/size
 120 Date:           Oct 25, 2019
 121 KernelVersion:  5.6.0
 122 Contact:        dmaengine@vger.kernel.org
 123 Description:    The work queue size for this work queue.
 124
 125 What:           sys/bus/dsa/devices/wq<m>.<n>/type
 126 Date:           Oct 25, 2019
 127 KernelVersion:  5.6.0
 128 Contact:        dmaengine@vger.kernel.org
 129 Description:    The type of this work queue, it can be "kernel" type for work
 130                 queue usages in the kernel space or "user" type for work queue
 131                 usages by applications in user space.
 132
 133 What:           sys/bus/dsa/devices/wq<m>.<n>/cdev_minor
 134 Date:           Oct 25, 2019
 135 KernelVersion:  5.6.0
 136 Contact:        dmaengine@vger.kernel.org
 137 Description:    The minor number assigned to this work queue by the character
 138                 device driver.
 139
 140 What:           sys/bus/dsa/devices/wq<m>.<n>/mode
 141 Date:           Oct 25, 2019
 142 KernelVersion:  5.6.0
 143 Contact:        dmaengine@vger.kernel.org
 144 Description:    The work queue mode type for this work queue.
 145
 146 What:           sys/bus/dsa/devices/wq<m>.<n>/priority
 147 Date:           Oct 25, 2019
 148 KernelVersion:  5.6.0
 149 Contact:        dmaengine@vger.kernel.org
 150 Description:    The priority value of this work queue, it is a vlue relative to
 151                 other work queue in the same group to control quality of service
 152                 for dispatching work from multiple workqueues in the same group.
 153
 154 What:           sys/bus/dsa/devices/wq<m>.<n>/state
 155 Date:           Oct 25, 2019
 156 KernelVersion:  5.6.0
 157 Contact:        dmaengine@vger.kernel.org
 158 Description:    The current state of the work queue.
 159
 160 What:           sys/bus/dsa/devices/wq<m>.<n>/threshold
 161 Date:           Oct 25, 2019
 162 KernelVersion:  5.6.0
 163 Contact:        dmaengine@vger.kernel.org
 164 Description:    The number of entries in this work queue that may be filled
 165                 via a limited portal.
 166
 167 What:           sys/bus/dsa/devices/engine<m>.<n>/group_id
 168 Date:           Oct 25, 2019
 169 KernelVersion:  5.6.0
 170 Contact:        dmaengine@vger.kernel.org
 171 Description:    The group that this engine belongs to.