| Tom Rini | 53633a8 | 2024-02-29 12:33:36 -0500 | [diff] [blame^] | 1 | # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) |
| 2 | %YAML 1.2 |
| 3 | --- |
| 4 | $id: http://devicetree.org/schemas/misc/qcom,fastrpc.yaml# |
| 5 | $schema: http://devicetree.org/meta-schemas/core.yaml# |
| 6 | |
| 7 | title: Qualcomm FastRPC Driver |
| 8 | |
| 9 | maintainers: |
| 10 | - Srinivas Kandagatla <srinivas.kandagatla@linaro.org> |
| 11 | |
| 12 | description: | |
| 13 | The FastRPC implements an IPC (Inter-Processor Communication) |
| 14 | mechanism that allows for clients to transparently make remote method |
| 15 | invocations across DSP and APPS boundaries. This enables developers |
| 16 | to offload tasks to the DSP and free up the application processor for |
| 17 | other tasks. |
| 18 | |
| 19 | properties: |
| 20 | compatible: |
| 21 | const: qcom,fastrpc |
| 22 | |
| 23 | label: |
| 24 | enum: |
| 25 | - adsp |
| 26 | - mdsp |
| 27 | - sdsp |
| 28 | - cdsp |
| 29 | |
| 30 | memory-region: |
| 31 | maxItems: 1 |
| 32 | description: |
| 33 | Phandle to a node describing memory to be used for remote heap CMA. |
| 34 | |
| 35 | qcom,glink-channels: |
| 36 | description: |
| 37 | A list of channels tied to this function, used for matching |
| 38 | the function to a set of virtual channels. |
| 39 | $ref: /schemas/types.yaml#/definitions/string-array |
| 40 | items: |
| 41 | - const: fastrpcglink-apps-dsp |
| 42 | |
| 43 | qcom,non-secure-domain: |
| 44 | description: |
| 45 | Used to mark the current domain as non-secure. |
| 46 | type: boolean |
| 47 | |
| 48 | qcom,smd-channels: |
| 49 | description: |
| 50 | Channel name used for the RPM communication |
| 51 | $ref: /schemas/types.yaml#/definitions/string-array |
| 52 | items: |
| 53 | - const: fastrpcsmd-apps-dsp |
| 54 | |
| 55 | qcom,vmids: |
| 56 | description: |
| 57 | Virtual machine IDs for remote processor. |
| 58 | $ref: /schemas/types.yaml#/definitions/uint32-array |
| 59 | |
| 60 | "#address-cells": |
| 61 | const: 1 |
| 62 | |
| 63 | "#size-cells": |
| 64 | const: 0 |
| 65 | |
| 66 | patternProperties: |
| 67 | "(compute-)?cb@[0-9]*$": |
| 68 | type: object |
| 69 | |
| 70 | description: > |
| 71 | Each subnode of the Fastrpc represents compute context banks available on the dsp. |
| 72 | |
| 73 | properties: |
| 74 | compatible: |
| 75 | const: qcom,fastrpc-compute-cb |
| 76 | |
| 77 | reg: |
| 78 | maxItems: 1 |
| 79 | |
| 80 | iommus: |
| 81 | minItems: 1 |
| 82 | maxItems: 3 |
| 83 | |
| 84 | qcom,nsessions: |
| 85 | $ref: /schemas/types.yaml#/definitions/uint32 |
| 86 | default: 1 |
| 87 | description: > |
| 88 | A value indicating how many sessions can share this context bank. |
| 89 | |
| 90 | required: |
| 91 | - compatible |
| 92 | - reg |
| 93 | |
| 94 | additionalProperties: false |
| 95 | |
| 96 | required: |
| 97 | - compatible |
| 98 | - label |
| 99 | - "#address-cells" |
| 100 | - "#size-cells" |
| 101 | |
| 102 | additionalProperties: false |
| 103 | |
| 104 | examples: |
| 105 | - | |
| 106 | #include <dt-bindings/interrupt-controller/arm-gic.h> |
| 107 | #include <dt-bindings/mailbox/qcom-ipcc.h> |
| 108 | |
| 109 | glink-edge { |
| 110 | interrupts-extended = <&ipcc IPCC_CLIENT_LPASS |
| 111 | IPCC_MPROC_SIGNAL_GLINK_QMP |
| 112 | IRQ_TYPE_EDGE_RISING>; |
| 113 | mboxes = <&ipcc IPCC_CLIENT_LPASS |
| 114 | IPCC_MPROC_SIGNAL_GLINK_QMP>; |
| 115 | label = "lpass"; |
| 116 | qcom,remote-pid = <2>; |
| 117 | |
| 118 | fastrpc { |
| 119 | compatible = "qcom,fastrpc"; |
| 120 | qcom,glink-channels = "fastrpcglink-apps-dsp"; |
| 121 | label = "sdsp"; |
| 122 | qcom,non-secure-domain; |
| 123 | #address-cells = <1>; |
| 124 | #size-cells = <0>; |
| 125 | |
| 126 | compute-cb@1 { |
| 127 | compatible = "qcom,fastrpc-compute-cb"; |
| 128 | reg = <1>; |
| 129 | iommus = <&apps_smmu 0x0541 0x0>; |
| 130 | }; |
| 131 | |
| 132 | compute-cb@2 { |
| 133 | compatible = "qcom,fastrpc-compute-cb"; |
| 134 | reg = <2>; |
| 135 | iommus = <&apps_smmu 0x0542 0x0>; |
| 136 | }; |
| 137 | |
| 138 | compute-cb@3 { |
| 139 | compatible = "qcom,fastrpc-compute-cb"; |
| 140 | reg = <3>; |
| 141 | iommus = <&apps_smmu 0x0543 0x0>; |
| 142 | }; |
| 143 | }; |
| 144 | }; |