# SPDX-License-Identifier: GPL-2.0 OR BSD-2-Clause %YAML 1.2 --- $id: http://devicetree.org/schemas/net/qcom,ipa.yaml# $schema: http://devicetree.org/meta-schemas/core.yaml# title: Qualcomm IP Accelerator (IPA) maintainers: - Alex Elder description: This binding describes the Qualcomm IPA. The IPA is capable of offloading certain network processing tasks (e.g. filtering, routing, and NAT) from the main processor. The IPA sits between multiple independent "execution environments," including the Application Processor (AP) and the modem. The IPA presents a Generic Software Interface (GSI) to each execution environment. The GSI is an integral part of the IPA, but it is logically isolated and has a distinct interrupt and a separately-defined address space. See also soc/qcom/qcom,smp2p.txt and interconnect/interconnect.txt. See iommu/iommu.txt and iommu/arm,smmu.yaml for more information about SMMU bindings. - | -------- --------- | | | | | AP +<---. .----+ Modem | | +--. | | .->+ | | | | | | | | | -------- | | | | --------- v | v | --+-+---+-+-- | GSI | |-----------| | | | IPA | | | ------------- properties: compatible: const: "qcom,sdm845-ipa" reg: items: - description: IPA registers - description: IPA shared memory - description: GSI registers reg-names: items: - const: ipa-reg - const: ipa-shared - const: gsi iommus: maxItems: 1 clocks: maxItems: 1 clock-names: const: core interrupts: items: - description: IPA interrupt (hardware IRQ) - description: GSI interrupt (hardware IRQ) - description: Modem clock query interrupt (smp2p interrupt) - description: Modem setup ready interrupt (smp2p interrupt) interrupt-names: items: - const: ipa - const: gsi - const: ipa-clock-query - const: ipa-setup-ready interconnects: items: - description: Interconnect path between IPA and main memory - description: Interconnect path between IPA and internal memory - description: Interconnect path between IPA and the AP subsystem interconnect-names: items: - const: memory - const: imem - const: config qcom,smem-states: $ref: /schemas/types.yaml#/definitions/phandle-array description: State bits used in by the AP to signal the modem. items: - description: Whether the "ipa-clock-enabled" state bit is valid - description: Whether the IPA clock is enabled (if valid) qcom,smem-state-names: $ref: /schemas/types.yaml#/definitions/string-array description: The names of the state bits used for SMP2P output items: - const: ipa-clock-enabled-valid - const: ipa-clock-enabled modem-init: type: boolean description: If present, it indicates that the modem is responsible for performing early IPA initialization, including loading and validating firwmare used by the GSI. memory-region: maxItems: 1 description: If present, a phandle for a reserved memory area that holds the firmware passed to Trust Zone for authentication. Required when Trust Zone (not the modem) performs early initialization. required: - compatible - iommus - reg - clocks - interrupts - interconnects - qcom,smem-states oneOf: - required: - modem-init - required: - memory-region additionalProperties: false examples: - | #include #include #include smp2p-mpss { compatible = "qcom,smp2p"; ipa_smp2p_out: ipa-ap-to-modem { qcom,entry-name = "ipa"; #qcom,smem-state-cells = <1>; }; ipa_smp2p_in: ipa-modem-to-ap { qcom,entry-name = "ipa"; interrupt-controller; #interrupt-cells = <2>; }; }; ipa@1e40000 { compatible = "qcom,sdm845-ipa"; modem-init; iommus = <&apps_smmu 0x720 0x3>; reg = <0x1e40000 0x7000>, <0x1e47000 0x2000>, <0x1e04000 0x2c000>; reg-names = "ipa-reg", "ipa-shared", "gsi"; interrupts-extended = <&intc GIC_SPI 311 IRQ_TYPE_EDGE_RISING>, <&intc GIC_SPI 432 IRQ_TYPE_LEVEL_HIGH>, <&ipa_smp2p_in 0 IRQ_TYPE_EDGE_RISING>, <&ipa_smp2p_in 1 IRQ_TYPE_EDGE_RISING>; interrupt-names = "ipa", "gsi", "ipa-clock-query", "ipa-setup-ready"; clocks = <&rpmhcc RPMH_IPA_CLK>; clock-names = "core"; interconnects = <&rsc_hlos MASTER_IPA &rsc_hlos SLAVE_EBI1>, <&rsc_hlos MASTER_IPA &rsc_hlos SLAVE_IMEM>, <&rsc_hlos MASTER_APPSS_PROC &rsc_hlos SLAVE_IPA_CFG>; interconnect-names = "memory", "imem", "config"; qcom,smem-states = <&ipa_smp2p_out 0>, <&ipa_smp2p_out 1>; qcom,smem-state-names = "ipa-clock-enabled-valid", "ipa-clock-enabled"; };