| # 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 <elder@kernel.org> |
| |
| 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: |
| enum: |
| - qcom,msm8998-ipa |
| - qcom,sc7180-ipa |
| - qcom,sc7280-ipa |
| - qcom,sdm845-ipa |
| - qcom,sdx55-ipa |
| - qcom,sm8350-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: |
| 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. |
| |
| firmware-name: |
| $ref: /schemas/types.yaml#/definitions/string |
| description: |
| If present, name (or relative path) of the file within the |
| firmware search path containing the firmware image used when |
| initializing IPA hardware. Optional, and only used when |
| Trust Zone performs early initialization. |
| |
| required: |
| - compatible |
| - iommus |
| - reg |
| - clocks |
| - interrupts |
| - interconnects |
| - qcom,smem-states |
| |
| # Either modem-init is present, or memory-region must be present. |
| oneOf: |
| - required: |
| - modem-init |
| - required: |
| - memory-region |
| |
| # If memory-region is present, firmware-name may optionally be present. |
| # But if modem-init is present, firmware-name must not be present. |
| if: |
| required: |
| - modem-init |
| then: |
| not: |
| required: |
| - firmware-name |
| |
| additionalProperties: false |
| |
| examples: |
| - | |
| #include <dt-bindings/interrupt-controller/arm-gic.h> |
| #include <dt-bindings/clock/qcom,rpmh.h> |
| #include <dt-bindings/interconnect/qcom,sdm845.h> |
| |
| 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"; |
| }; |
