fb42387b2e
Add property to set DSP domain as non-secure. ADSP/MDSP/SDSP are by default secured, where as CDSP can be either be secured/unsecured. non-secured Compute DSP would allow users to load unsigned process and run hexagon instructions, but limiting access to secured hardware within the DSP. Based on this flag device nodes for secured and unsecured are created. Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Jeya R <jeyr@codeaurora.org> Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Link: https://lore.kernel.org/r/20220214161002.6831-5-srinivas.kandagatla@linaro.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
84 lines
1.8 KiB
Plaintext
84 lines
1.8 KiB
Plaintext
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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- qcom,non-secure-domain:
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Usage: required
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Value type: <boolean>
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Definition: Property to specify that dsp domain is non-secure.
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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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