1 # SPDX-License-Identifier: GPL-2.0 OR BSD-2-Clause
4 $id: http://devicetree.org/schemas/net/qcom,ipa.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: Qualcomm IP Accelerator (IPA)
10 - Alex Elder <elder@kernel.org>
13 This binding describes the Qualcomm IPA. The IPA is capable of offloading
14 certain network processing tasks (e.g. filtering, routing, and NAT) from
17 The IPA sits between multiple independent "execution environments,"
18 including the Application Processor (AP) and the modem. The IPA presents
19 a Generic Software Interface (GSI) to each execution environment.
20 The GSI is an integral part of the IPA, but it is logically isolated
21 and has a distinct interrupt and a separately-defined address space.
23 See also soc/qcom/qcom,smp2p.txt and interconnect/interconnect.txt. See
24 iommu/iommu.txt and iommu/arm,smmu.yaml for more information about SMMU
31 | AP +<---. .----+ Modem |
34 -------- | | | | ---------
55 - description: IPA registers
56 - description: IPA shared memory
57 - description: GSI registers
76 - description: IPA interrupt (hardware IRQ)
77 - description: GSI interrupt (hardware IRQ)
78 - description: Modem clock query interrupt (smp2p interrupt)
79 - description: Modem setup ready interrupt (smp2p interrupt)
85 - const: ipa-clock-query
86 - const: ipa-setup-ready
90 - description: Interconnect path between IPA and main memory
91 - description: Interconnect path between IPA and internal memory
92 - description: Interconnect path between IPA and the AP subsystem
101 $ref: /schemas/types.yaml#/definitions/phandle-array
102 description: State bits used in by the AP to signal the modem.
104 - description: Whether the "ipa-clock-enabled" state bit is valid
105 - description: Whether the IPA clock is enabled (if valid)
107 qcom,smem-state-names:
108 description: The names of the state bits used for SMP2P output
110 - const: ipa-clock-enabled-valid
111 - const: ipa-clock-enabled
116 If present, it indicates that the modem is responsible for
117 performing early IPA initialization, including loading and
118 validating firwmare used by the GSI.
123 If present, a phandle for a reserved memory area that holds
124 the firmware passed to Trust Zone for authentication. Required
125 when Trust Zone (not the modem) performs early initialization.
128 $ref: /schemas/types.yaml#/definitions/string
130 If present, name (or relative path) of the file within the
131 firmware search path containing the firmware image used when
132 initializing IPA hardware. Optional, and only used when
133 Trust Zone performs early initialization.
144 # Either modem-init is present, or memory-region must be present.
151 # If memory-region is present, firmware-name may optionally be present.
152 # But if modem-init is present, firmware-name must not be present.
161 additionalProperties: false
165 #include <dt-bindings/interrupt-controller/arm-gic.h>
166 #include <dt-bindings/clock/qcom,rpmh.h>
167 #include <dt-bindings/interconnect/qcom,sdm845.h>
170 compatible = "qcom,smp2p";
171 ipa_smp2p_out: ipa-ap-to-modem {
172 qcom,entry-name = "ipa";
173 #qcom,smem-state-cells = <1>;
176 ipa_smp2p_in: ipa-modem-to-ap {
177 qcom,entry-name = "ipa";
178 interrupt-controller;
179 #interrupt-cells = <2>;
183 compatible = "qcom,sdm845-ipa";
187 iommus = <&apps_smmu 0x720 0x3>;
188 reg = <0x1e40000 0x7000>,
191 reg-names = "ipa-reg",
195 interrupts-extended = <&intc GIC_SPI 311 IRQ_TYPE_EDGE_RISING>,
196 <&intc GIC_SPI 432 IRQ_TYPE_LEVEL_HIGH>,
197 <&ipa_smp2p_in 0 IRQ_TYPE_EDGE_RISING>,
198 <&ipa_smp2p_in 1 IRQ_TYPE_EDGE_RISING>;
199 interrupt-names = "ipa",
204 clocks = <&rpmhcc RPMH_IPA_CLK>;
205 clock-names = "core";
208 <&rsc_hlos MASTER_IPA &rsc_hlos SLAVE_EBI1>,
209 <&rsc_hlos MASTER_IPA &rsc_hlos SLAVE_IMEM>,
210 <&rsc_hlos MASTER_APPSS_PROC &rsc_hlos SLAVE_IPA_CFG>;
211 interconnect-names = "memory",
215 qcom,smem-states = <&ipa_smp2p_out 0>,
217 qcom,smem-state-names = "ipa-clock-enabled-valid",