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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 10:05:51 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 10:05:51 +0000 |
commit | 5d1646d90e1f2cceb9f0828f4b28318cd0ec7744 (patch) | |
tree | a94efe259b9009378be6d90eb30d2b019d95c194 /Documentation/devicetree/bindings/reserved-memory/qcom,rmtfs-mem.txt | |
parent | Initial commit. (diff) | |
download | linux-430c2fc249ea5c0536abd21c23382884005c9093.tar.xz linux-430c2fc249ea5c0536abd21c23382884005c9093.zip |
Adding upstream version 5.10.209.upstream/5.10.209upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'Documentation/devicetree/bindings/reserved-memory/qcom,rmtfs-mem.txt')
-rw-r--r-- | Documentation/devicetree/bindings/reserved-memory/qcom,rmtfs-mem.txt | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/reserved-memory/qcom,rmtfs-mem.txt b/Documentation/devicetree/bindings/reserved-memory/qcom,rmtfs-mem.txt new file mode 100644 index 000000000..8562ba1dc --- /dev/null +++ b/Documentation/devicetree/bindings/reserved-memory/qcom,rmtfs-mem.txt @@ -0,0 +1,51 @@ +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>; + }; + }; |