1What: /sys/devices/platform/hidma-mgmt*/chanops/chan*/priority 2 /sys/devices/platform/QCOM8060:*/chanops/chan*/priority 3Date: Nov 2015 4KernelVersion: 4.4 5Contact: "Sinan Kaya <okaya@kernel.org>" 6Description: 7 Contains either 0 or 1 and indicates if the DMA channel is a 8 low priority (0) or high priority (1) channel. 9 10What: /sys/devices/platform/hidma-mgmt*/chanops/chan*/weight 11 /sys/devices/platform/QCOM8060:*/chanops/chan*/weight 12Date: Nov 2015 13KernelVersion: 4.4 14Contact: "Sinan Kaya <okaya@kernel.org>" 15Description: 16 Contains 0..15 and indicates the weight of the channel among 17 equal priority channels during round robin scheduling. 18 19What: /sys/devices/platform/hidma-mgmt*/chreset_timeout_cycles 20 /sys/devices/platform/QCOM8060:*/chreset_timeout_cycles 21Date: Nov 2015 22KernelVersion: 4.4 23Contact: "Sinan Kaya <okaya@kernel.org>" 24Description: 25 Contains the platform specific cycle value to wait after a 26 reset command is issued. If the value is chosen too short, 27 then the HW will issue a reset failure interrupt. The value 28 is platform specific and should not be changed without 29 consultance. 30 31What: /sys/devices/platform/hidma-mgmt*/dma_channels 32 /sys/devices/platform/QCOM8060:*/dma_channels 33Date: Nov 2015 34KernelVersion: 4.4 35Contact: "Sinan Kaya <okaya@kernel.org>" 36Description: 37 Contains the number of dma channels supported by one instance 38 of HIDMA hardware. The value may change from chip to chip. 39 40What: /sys/devices/platform/hidma-mgmt*/hw_version_major 41 /sys/devices/platform/QCOM8060:*/hw_version_major 42Date: Nov 2015 43KernelVersion: 4.4 44Contact: "Sinan Kaya <okaya@kernel.org>" 45Description: 46 Version number major for the hardware. 47 48What: /sys/devices/platform/hidma-mgmt*/hw_version_minor 49 /sys/devices/platform/QCOM8060:*/hw_version_minor 50Date: Nov 2015 51KernelVersion: 4.4 52Contact: "Sinan Kaya <okaya@kernel.org>" 53Description: 54 Version number minor for the hardware. 55 56What: /sys/devices/platform/hidma-mgmt*/max_rd_xactions 57 /sys/devices/platform/QCOM8060:*/max_rd_xactions 58Date: Nov 2015 59KernelVersion: 4.4 60Contact: "Sinan Kaya <okaya@kernel.org>" 61Description: 62 Contains a value between 0 and 31. Maximum number of 63 read transactions that can be issued back to back. 64 Choosing a higher number gives better performance but 65 can also cause performance reduction to other peripherals 66 sharing the same bus. 67 68What: /sys/devices/platform/hidma-mgmt*/max_read_request 69 /sys/devices/platform/QCOM8060:*/max_read_request 70Date: Nov 2015 71KernelVersion: 4.4 72Contact: "Sinan Kaya <okaya@kernel.org>" 73Description: 74 Size of each read request. The value needs to be a power 75 of two and can be between 128 and 1024. 76 77What: /sys/devices/platform/hidma-mgmt*/max_wr_xactions 78 /sys/devices/platform/QCOM8060:*/max_wr_xactions 79Date: Nov 2015 80KernelVersion: 4.4 81Contact: "Sinan Kaya <okaya@kernel.org>" 82Description: 83 Contains a value between 0 and 31. Maximum number of 84 write transactions that can be issued back to back. 85 Choosing a higher number gives better performance but 86 can also cause performance reduction to other peripherals 87 sharing the same bus. 88 89 90What: /sys/devices/platform/hidma-mgmt*/max_write_request 91 /sys/devices/platform/QCOM8060:*/max_write_request 92Date: Nov 2015 93KernelVersion: 4.4 94Contact: "Sinan Kaya <okaya@kernel.org>" 95Description: 96 Size of each write request. The value needs to be a power 97 of two and can be between 128 and 1024. 98