Quelle  sysfs-platform-hidma-mgmt   Sprache: C

What:  /sys/devices/platform/hidma-mgmt*/chanops/chan*/priority
  /sys/devices/platform/QCOM8060:*/chanops/chan*/priority
Date:  Nov 2015
KernelVersion: 4.4
Contact: "Sinan Kaya <okaya@kernel.org>"
Description:
  Contains either 0 or 1 and indicates if the DMA channel is a
  low priority (0) or high priority (1) channel.

What:  /sys/devices/platform/hidma-mgmt*/chanops/chan*/weight
  /sys/devices/platform/QCOM8060:*/chanops/chan*/weight
Date:  Nov 2015
KernelVersion: 4.4
Contact: "Sinan Kaya <okaya@kernel.org>"
Description:
  Contains 0..15 and indicates the weight of the channel among
  equal priority channels during round robin scheduling.

What:  /sys/devices/platform/hidma-mgmt*/chreset_timeout_cycles
  /sys/devices/platform/QCOM8060:*/chreset_timeout_cycles
Date:  Nov 2015
KernelVersion: 4.4
Contact: "Sinan Kaya <okaya@kernel.org>"
Description:
  Contains the platform specific cycle value to wait after a
  reset command is issued. If the value is chosen too short,
  then the HW will issue a reset failure interrupt. The value
  is platform specific and should not be changed without
  consultance.

What:  /sys/devices/platform/hidma-mgmt*/dma_channels
  /sys/devices/platform/QCOM8060:*/dma_channels
Date:  Nov 2015
KernelVersion: 4.4
Contact: "Sinan Kaya <okaya@kernel.org>"
Description:
  Contains the number of dma channels supported by one instance
  of HIDMA hardware. The value may change from chip to chip.

What:  /sys/devices/platform/hidma-mgmt*/hw_version_major
  /sys/devices/platform/QCOM8060:*/hw_version_major
Date:  Nov 2015
KernelVersion: 4.4
Contact: "Sinan Kaya <okaya@kernel.org>"
Description:
  Version number major for the hardware.

What:  /sys/devices/platform/hidma-mgmt*/hw_version_minor
  /sys/devices/platform/QCOM8060:*/hw_version_minor
Date:  Nov 2015
KernelVersion: 4.4
Contact: "Sinan Kaya <okaya@kernel.org>"
Description:
  Version number minor for the hardware.

What:  /sys/devices/platform/hidma-mgmt*/max_rd_xactions
  /sys/devices/platform/QCOM8060:*/max_rd_xactions
Date:  Nov 2015
KernelVersion: 4.4
Contact: "Sinan Kaya <okaya@kernel.org>"
Description:
  Contains a value between 0 and 31. Maximum number of
  read transactions that can be issued back to back.
  Choosing a higher number gives better performance but
  can also cause performance reduction to other peripherals
  sharing the same bus.

What:  /sys/devices/platform/hidma-mgmt*/max_read_request
  /sys/devices/platform/QCOM8060:*/max_read_request
Date:  Nov 2015
KernelVersion: 4.4
Contact: "Sinan Kaya <okaya@kernel.org>"
Description:
  Size of each read request. The value needs to be a power
  of two and can be between 128 and 1024.

What:  /sys/devices/platform/hidma-mgmt*/max_wr_xactions
  /sys/devices/platform/QCOM8060:*/max_wr_xactions
Date:  Nov 2015
KernelVersion: 4.4
Contact: "Sinan Kaya <okaya@kernel.org>"
Description:
  Contains a value between 0 and 31. Maximum number of
  write transactions that can be issued back to back.
  Choosing a higher number gives better performance but
  can also cause performance reduction to other peripherals
  sharing the same bus.


What:  /sys/devices/platform/hidma-mgmt*/max_write_request
  /sys/devices/platform/QCOM8060:*/max_write_request
Date:  Nov 2015
KernelVersion: 4.4
Contact: "Sinan Kaya <okaya@kernel.org>"
Description:
  Size of each write request. The value needs to be a power
  of two and can be between 128 and 1024.