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 <[email protected]>"
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 <[email protected]>"
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 <[email protected]>"
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 <[email protected]>"
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 <[email protected]>"
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 <[email protected]>"
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 <[email protected]>"
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 <[email protected]>"
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 <[email protected]>"
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 <[email protected]>"
Description:
Size of each write request. The value needs to be a power
of two and can be between 128 and 1024.
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