Qualcomm Technologies, Inc. FastRPC Driver
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The FastRPC implements an IPC (Inter-Processor Communication)
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mechanism that allows for clients to transparently make remote method
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invocations across DSP and APPS boundaries. This enables developers
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to offload tasks to the DSP and free up the application processor for
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other tasks.
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- compatible:
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Usage: required
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Value type: <stringlist>
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Definition: must be "qcom,fastrpc"
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- label
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Usage: required
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Value type: <string>
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Definition: should specify the dsp domain name this fastrpc
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corresponds to. must be one of this: "adsp", "mdsp", "sdsp", "cdsp"
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- #address-cells
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Usage: required
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Value type: <u32>
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Definition: Must be 1
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- #size-cells
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Usage: required
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Value type: <u32>
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Definition: Must be 0
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= COMPUTE BANKS
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Each subnode of the Fastrpc represents compute context banks available
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on the dsp.
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- All Compute context banks MUST contain the following properties:
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- compatible:
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Usage: required
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Value type: <stringlist>
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Definition: must be "qcom,fastrpc-compute-cb"
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- reg
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Usage: required
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Value type: <u32>
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Definition: Context Bank ID.
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- qcom,nsessions:
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Usage: Optional
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Value type: <u32>
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Defination: A value indicating how many sessions can share this
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context bank. Defaults to 1 when this property
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is not specified.
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Example:
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adsp-pil {
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compatible = "qcom,msm8996-adsp-pil";
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...
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smd-edge {
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label = "lpass";
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fastrpc {
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compatible = "qcom,fastrpc";
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qcom,smd-channels = "fastrpcsmd-apps-dsp";
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label = "adsp";
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#address-cells = <1>;
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#size-cells = <0>;
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cb@1 {
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compatible = "qcom,fastrpc-compute-cb";
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reg = <1>;
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};
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cb@2 {
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compatible = "qcom,fastrpc-compute-cb";
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reg = <2>;
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};
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...
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};
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};
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};
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