1Qualcomm Technologies, Inc. FastRPC Driver 2 3The FastRPC implements an IPC (Inter-Processor Communication) 4mechanism that allows for clients to transparently make remote method 5invocations across DSP and APPS boundaries. This enables developers 6to offload tasks to the DSP and free up the application processor for 7other tasks. 8 9- compatible: 10 Usage: required 11 Value type: <stringlist> 12 Definition: must be "qcom,fastrpc" 13 14- label 15 Usage: required 16 Value type: <string> 17 Definition: should specify the dsp domain name this fastrpc 18 corresponds to. must be one of this: "adsp", "mdsp", "sdsp", "cdsp" 19 20- qcom,non-secure-domain: 21 Usage: required 22 Value type: <boolean> 23 Definition: Property to specify that dsp domain is non-secure. 24 25- qcom,vmids: 26 Usage: optional 27 Value type: <u32 array> 28 Definition: Virtual machine IDs for remote processor. 29 30- #address-cells 31 Usage: required 32 Value type: <u32> 33 Definition: Must be 1 34 35- #size-cells 36 Usage: required 37 Value type: <u32> 38 Definition: Must be 0 39 40= COMPUTE BANKS 41Each subnode of the Fastrpc represents compute context banks available 42on the dsp. 43- All Compute context banks MUST contain the following properties: 44 45- compatible: 46 Usage: required 47 Value type: <stringlist> 48 Definition: must be "qcom,fastrpc-compute-cb" 49 50- reg 51 Usage: required 52 Value type: <u32> 53 Definition: Context Bank ID. 54 55- qcom,nsessions: 56 Usage: Optional 57 Value type: <u32> 58 Defination: A value indicating how many sessions can share this 59 context bank. Defaults to 1 when this property 60 is not specified. 61 62Example: 63 64adsp-pil { 65 compatible = "qcom,msm8996-adsp-pil"; 66 ... 67 smd-edge { 68 label = "lpass"; 69 fastrpc { 70 compatible = "qcom,fastrpc"; 71 qcom,smd-channels = "fastrpcsmd-apps-dsp"; 72 label = "adsp"; 73 #address-cells = <1>; 74 #size-cells = <0>; 75 76 cb@1 { 77 compatible = "qcom,fastrpc-compute-cb"; 78 reg = <1>; 79 }; 80 81 cb@2 { 82 compatible = "qcom,fastrpc-compute-cb"; 83 reg = <2>; 84 }; 85 ... 86 }; 87 }; 88}; 89