73 lines
2.3 KiB
Plaintext
73 lines
2.3 KiB
Plaintext
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Qualcomm Technologies, Inc. FastRPC Driver
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The MSM FastRPC driver 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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Required properties:
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- compatible : Must be "qcom,msm-fastrpc-adsp"
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Optional subnodes:
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- qcom,msm_fastrpc_compute_cb : Child nodes representing the compute context
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banks
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Subnode properties:
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- compatible : Must be "qcom,msm-fastrpc-compute-cb"
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- label: Label describing the channel this context bank belongs to
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- iommus : A list of phandle and IOMMU specifier pairs that describe the
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IOMMU master interfaces of the device
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Example:
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qcom,msm_fastrpc {
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compatible = "qcom,msm-fastrpc-adsp";
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qcom,msm_fastrpc_compute_cb_1 {
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compatible = "qcom,msm-fastrpc-compute-cb";
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label = "adsprpc-smd";
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iommus = <&lpass_q6_smmu 8>,
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};
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qcom,msm_fastrpc_compute_cb_2 {
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compatible = "qcom,msm-fastrpc-compute-cb";
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label = "adsprpc-smd";
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iommus = <&lpass_q6_smmu 9>,
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};
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};
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Legacy SMMU v1/v2:
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Required properties:
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- compatible : Must be "qcom,msm-fastprc-legacy-compute-cb"
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Required subnode:
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- qcom,msm_fastrpc_compute_cb : Child nodes representing the compute context
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banks
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Required subnode properties:
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- qcom,adsp-shared-phandle: phandle that describe the context bank handle
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- qcom,adsp-shared-sids : A list of SID associated with the context bank
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- qcom,virtual-addr-pool : Virtual address range that the context bank
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will be using
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Example:
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qcom,adsprpc_domains {
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compatible = "qcom,msm-fastrpc-legacy-compute-cb";
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qcom,msm_fastrpc_compute_cb {
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qcom,adsp-shared-phandle = <&adsp_shared>;
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qcom,adsp-shared-sids = <0x8 0x9>;
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qcom,virtual-addr-pool = <0x80000000 0x7FFFFFFF>;
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};
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};
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Remote Heap:
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Required properties:
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- compatible : Must be "qcom,msm-adsprpc-mem-region"
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- memory-region : CMA region which is owned by this device
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Example:
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qcom,adsprpc-mem {
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compatible = "qcom,msm-adsprpc-mem-region";
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memory-region = <&adsp_mem>;
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};
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