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Message-Id: <20190531035348.7194-3-elder@linaro.org>
Date: Thu, 30 May 2019 22:53:33 -0500
From: Alex Elder <elder@...aro.org>
To: davem@...emloft.net, arnd@...db.de, bjorn.andersson@...aro.org,
ilias.apalodimas@...aro.org, robh+dt@...nel.org,
mark.rutland@....com, devicetree@...r.kernel.org
Cc: evgreen@...omium.org, benchan@...gle.com, ejcaruso@...gle.com,
cpratapa@...eaurora.org, syadagir@...eaurora.org,
subashab@...eaurora.org, abhishek.esse@...il.com,
netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
linux-soc@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
linux-arm-msm@...r.kernel.org
Subject: [PATCH v2 02/17] dt-bindings: soc: qcom: add IPA bindings
Add the binding definitions for the "qcom,ipa" device tree node.
Signed-off-by: Alex Elder <elder@...aro.org>
---
.../devicetree/bindings/net/qcom,ipa.yaml | 180 ++++++++++++++++++
1 file changed, 180 insertions(+)
create mode 100644 Documentation/devicetree/bindings/net/qcom,ipa.yaml
diff --git a/Documentation/devicetree/bindings/net/qcom,ipa.yaml b/Documentation/devicetree/bindings/net/qcom,ipa.yaml
new file mode 100644
index 000000000000..0037fc278a61
--- /dev/null
+++ b/Documentation/devicetree/bindings/net/qcom,ipa.yaml
@@ -0,0 +1,180 @@
+# SPDX-License-Identifier: GPL-2.0
+%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@...nel.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.
+
+ - |
+ -------- ---------
+ | | | |
+ | 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
+
+ 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:
+ 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.
+
+required:
+ - compatible
+ - reg
+ - clocks
+ - interrupts
+ - interconnects
+ - qcom,smem-states
+
+oneOf:
+ - required:
+ - modem-init
+ - required:
+ - memory-region
+
+examples:
+ - |
+ 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@...0000 {
+ compatible = "qcom,sdm845-ipa";
+
+ modem-init;
+
+ reg = <0 0x1e40000 0 0x7000>,
+ <0 0x1e47000 0 0x2000>,
+ <0 0x1e04000 0 0x2c000>;
+ reg-names = "ipa-reg",
+ "ipa-shared";
+ "gsi";
+
+ interrupts-extended = <&intc 0 311 IRQ_TYPE_EDGE_RISING>,
+ <&intc 0 432 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";
+ };
--
2.20.1
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