FreeBSD/Linux Kernel Cross Reference
sys/contrib/device-tree/Bindings/reserved-memory/qcom,rmtfs-mem.txt

     Qualcomm Remote File System Memory binding
     
     This binding describes the Qualcomm remote filesystem memory, which serves the
     purpose of describing the shared memory region used for remote processors to
     access block device data using the Remote Filesystem protocol.
     
     - compatible:
             Usage: required
             Value type: <stringlist>
            Definition: must be:
                        "qcom,rmtfs-mem"
    
    - reg:
            Usage: required for static allocation
            Value type: <prop-encoded-array>
            Definition: must specify base address and size of the memory region,
                        as described in reserved-memory.txt
    
    - size:
            Usage: required for dynamic allocation
            Value type: <prop-encoded-array>
            Definition: must specify a size of the memory region, as described in
                        reserved-memory.txt
    
    - qcom,client-id:
            Usage: required
            Value type: <u32>
            Definition: identifier of the client to use this region for buffers.
    
    - qcom,vmid:
            Usage: optional
            Value type: <u32>
            Definition: vmid of the remote processor, to set up memory protection.
    
    = EXAMPLE
    The following example shows the remote filesystem memory setup for APQ8016,
    with the rmtfs region for the Hexagon DSP (id #1) located at 0x86700000.
    
            reserved-memory {
                    #address-cells = <2>;
                    #size-cells = <2>;
                    ranges;
    
                    rmtfs@86700000 {
                            compatible = "qcom,rmtfs-mem";
                            reg = <0x0 0x86700000 0x0 0xe0000>;
                            no-map;
    
                            qcom,client-id = <1>;
                    };
            };

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