98 lines · plain
1What: /sys/devices/platform/hidma-mgmt*/chanops/chan*/priority2 /sys/devices/platform/QCOM8060:*/chanops/chan*/priority3Date: Nov 20154KernelVersion: 4.45Contact: "Sinan Kaya <okaya@kernel.org>"6Description:7 Contains either 0 or 1 and indicates if the DMA channel is a8 low priority (0) or high priority (1) channel.9 10What: /sys/devices/platform/hidma-mgmt*/chanops/chan*/weight11 /sys/devices/platform/QCOM8060:*/chanops/chan*/weight12Date: Nov 201513KernelVersion: 4.414Contact: "Sinan Kaya <okaya@kernel.org>"15Description:16 Contains 0..15 and indicates the weight of the channel among17 equal priority channels during round robin scheduling.18 19What: /sys/devices/platform/hidma-mgmt*/chreset_timeout_cycles20 /sys/devices/platform/QCOM8060:*/chreset_timeout_cycles21Date: Nov 201522KernelVersion: 4.423Contact: "Sinan Kaya <okaya@kernel.org>"24Description:25 Contains the platform specific cycle value to wait after a26 reset command is issued. If the value is chosen too short,27 then the HW will issue a reset failure interrupt. The value28 is platform specific and should not be changed without29 consultance.30 31What: /sys/devices/platform/hidma-mgmt*/dma_channels32 /sys/devices/platform/QCOM8060:*/dma_channels33Date: Nov 201534KernelVersion: 4.435Contact: "Sinan Kaya <okaya@kernel.org>"36Description:37 Contains the number of dma channels supported by one instance38 of HIDMA hardware. The value may change from chip to chip.39 40What: /sys/devices/platform/hidma-mgmt*/hw_version_major41 /sys/devices/platform/QCOM8060:*/hw_version_major42Date: Nov 201543KernelVersion: 4.444Contact: "Sinan Kaya <okaya@kernel.org>"45Description:46 Version number major for the hardware.47 48What: /sys/devices/platform/hidma-mgmt*/hw_version_minor49 /sys/devices/platform/QCOM8060:*/hw_version_minor50Date: Nov 201551KernelVersion: 4.452Contact: "Sinan Kaya <okaya@kernel.org>"53Description:54 Version number minor for the hardware.55 56What: /sys/devices/platform/hidma-mgmt*/max_rd_xactions57 /sys/devices/platform/QCOM8060:*/max_rd_xactions58Date: Nov 201559KernelVersion: 4.460Contact: "Sinan Kaya <okaya@kernel.org>"61Description:62 Contains a value between 0 and 31. Maximum number of63 read transactions that can be issued back to back.64 Choosing a higher number gives better performance but65 can also cause performance reduction to other peripherals66 sharing the same bus.67 68What: /sys/devices/platform/hidma-mgmt*/max_read_request69 /sys/devices/platform/QCOM8060:*/max_read_request70Date: Nov 201571KernelVersion: 4.472Contact: "Sinan Kaya <okaya@kernel.org>"73Description:74 Size of each read request. The value needs to be a power75 of two and can be between 128 and 1024.76 77What: /sys/devices/platform/hidma-mgmt*/max_wr_xactions78 /sys/devices/platform/QCOM8060:*/max_wr_xactions79Date: Nov 201580KernelVersion: 4.481Contact: "Sinan Kaya <okaya@kernel.org>"82Description:83 Contains a value between 0 and 31. Maximum number of84 write transactions that can be issued back to back.85 Choosing a higher number gives better performance but86 can also cause performance reduction to other peripherals87 sharing the same bus.88 89 90What: /sys/devices/platform/hidma-mgmt*/max_write_request91 /sys/devices/platform/QCOM8060:*/max_write_request92Date: Nov 201593KernelVersion: 4.494Contact: "Sinan Kaya <okaya@kernel.org>"95Description:96 Size of each write request. The value needs to be a power97 of two and can be between 128 and 1024.98