5c7dd7acc3
repo: https://github.com/T-head-Semi/linux commit: b1313fe517ca3703119dcc99ef3bbf75ab42bcfb Change-Id: I6cbb35294024ea3a66140e311f4bb705fd7fd626
79 lines
1.7 KiB
Plaintext
79 lines
1.7 KiB
Plaintext
Qualcomm Technologies, Inc. FastRPC Driver
|
|
|
|
The FastRPC implements an IPC (Inter-Processor Communication)
|
|
mechanism that allows for clients to transparently make remote method
|
|
invocations across DSP and APPS boundaries. This enables developers
|
|
to offload tasks to the DSP and free up the application processor for
|
|
other tasks.
|
|
|
|
- compatible:
|
|
Usage: required
|
|
Value type: <stringlist>
|
|
Definition: must be "qcom,fastrpc"
|
|
|
|
- label
|
|
Usage: required
|
|
Value type: <string>
|
|
Definition: should specify the dsp domain name this fastrpc
|
|
corresponds to. must be one of this: "adsp", "mdsp", "sdsp", "cdsp"
|
|
|
|
- #address-cells
|
|
Usage: required
|
|
Value type: <u32>
|
|
Definition: Must be 1
|
|
|
|
- #size-cells
|
|
Usage: required
|
|
Value type: <u32>
|
|
Definition: Must be 0
|
|
|
|
= COMPUTE BANKS
|
|
Each subnode of the Fastrpc represents compute context banks available
|
|
on the dsp.
|
|
- All Compute context banks MUST contain the following properties:
|
|
|
|
- compatible:
|
|
Usage: required
|
|
Value type: <stringlist>
|
|
Definition: must be "qcom,fastrpc-compute-cb"
|
|
|
|
- reg
|
|
Usage: required
|
|
Value type: <u32>
|
|
Definition: Context Bank ID.
|
|
|
|
- qcom,nsessions:
|
|
Usage: Optional
|
|
Value type: <u32>
|
|
Defination: A value indicating how many sessions can share this
|
|
context bank. Defaults to 1 when this property
|
|
is not specified.
|
|
|
|
Example:
|
|
|
|
adsp-pil {
|
|
compatible = "qcom,msm8996-adsp-pil";
|
|
...
|
|
smd-edge {
|
|
label = "lpass";
|
|
fastrpc {
|
|
compatible = "qcom,fastrpc";
|
|
qcom,smd-channels = "fastrpcsmd-apps-dsp";
|
|
label = "adsp";
|
|
#address-cells = <1>;
|
|
#size-cells = <0>;
|
|
|
|
cb@1 {
|
|
compatible = "qcom,fastrpc-compute-cb";
|
|
reg = <1>;
|
|
};
|
|
|
|
cb@2 {
|
|
compatible = "qcom,fastrpc-compute-cb";
|
|
reg = <2>;
|
|
};
|
|
...
|
|
};
|
|
};
|
|
};
|