Add Memshare service for GPS

Documentation/devicetree/bindings/soc/qcom/qcom,memshare.yaml

@@ -0,0 +1,109 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: "http://devicetree.org/schemas/soc/qcom/qcom,memshare.yaml#"
+$schema: "http://devicetree.org/meta-schemas/core.yaml#"
+
+title: Qualcomm QMI Shared Memory Service
+
+description: |
+  This driver provides a QMI service that allows remote processors (like modem)
+  to request additional memory. It is used for applications like GPS in modem.
+
+maintainers:
+  - Nikita Travkin <nikitos.tr@gmail.com>
+
+properties:
+  compatible:
+    const: qcom,memshare
+
+  qcom,legacy-client:
+    $ref: /schemas/types.yaml#/definitions/phandle
+    description: Phandle to a memshare client node used for legacy requests.
+
+  "#address-cells":
+    const: 1
+
+  "#size-cells":
+    const: 0
+
+patternProperties:
+  "^.*@[0-9]+$":
+    type: object
+
+    properties:
+      reg:
+        description: Proc-ID for clients in this node.
+
+      qcom,qrtr-node:
+        $ref: /schemas/types.yaml#/definitions/uint32
+        description: Node from which the requests are expected.
+
+      "#address-cells":
+        const: 1
+
+      "#size-cells":
+        const: 0
+
+    patternProperties:
+      "^.*@[0-9]+$":
+        type: object
+
+        properties:
+          reg:
+            description: ID of this client.
+
+          memory-region:
+            $ref: /schemas/types.yaml#/definitions/phandle
+            description: |
+              Reserved memory region that should be used for allocation.
+
+        required:
+          - reg
+
+    required:
+      - reg
+      - qcom,qrtr-node
+
+required:
+  - compatible
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/soc/qcom,memshare.h>
+
+    reserved-memory {
+
+      #address-cells = <2>;
+      #size-cells = <2>;
+
+      gps_mem: gps@93c00000 {
+        reg = <0x0 0x93c00000 0x0 0x200000>;
+        no-map;
+      };
+    };
+
+    memshare {
+      compatible = "qcom,memshare";
+      qcom,legacy-client = <&memshare_gps>;
+
+      #address-cells = <1>;
+      #size-cells = <0>;
+
+      mpss@0 {
+        reg = <MEMSHARE_PROC_MPSS_V01>;
+        qcom,qrtr-node = <0>;
+
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        memshare_gps: gps@0 {
+          reg = <0>;
+          memory-region = <&gps_mem>;
+        };
+      };
+    };
+
+...

arch/arm/boot/dts/qcom-msm8916-samsung-serranovelte.dts

@@ -37,13 +37,19 @@
 			no-map;
 		};
 
-		wcnss_mem: wcnss@8c200000 {
-			reg = <0x0 0x8c200000 0x0 0x600000>;
+		gps_mem: gps@8c200000 {
+			status = "disabled";
+			reg = <0x0 0x8c200000 0x0 0x200000>;
+			no-map;
+		};
+
+		wcnss_mem: wcnss@8c400000 {
+			reg = <0x0 0x8c400000 0x0 0x600000>;
 			no-map;
 		};
 
-		venus_mem: venus@8c800000 {
-			reg = <0x0 0x8c800000 0x0 0x600000>;
+		venus_mem: venus@8ca00000 {
+			reg = <0x0 0x8ca00000 0x0 0x600000>;
 			no-map;
 		};
 	};

arch/arm64/boot/dts/qcom/msm8916-asus-z00l.dts

@@ -69,13 +69,19 @@
 			no-map;
 		};
 
-		wcnss_mem: wcnss@8bd00000 {
-			reg = <0x0 0x8bd00000 0x0 0x600000>;
+		gps_mem: gps@8bd00000 {
+			status = "disabled";
+			reg = <0x0 0x8bd00000 0x0 0x200000>;
+			no-map;
+		};
+
+		wcnss_mem: wcnss@8bf00000 {
+			reg = <0x0 0x8bf00000 0x0 0x600000>;
 			no-map;
 		};
 
-		venus_mem: venus@8c300000 {
-			reg = <0x0 0x8c300000 0x0 0x600000>;
+		venus_mem: venus@8c500000 {
+			reg = <0x0 0x8c500000 0x0 0x600000>;
 			no-map;
 		};
 	};

arch/arm64/boot/dts/qcom/msm8916-asus-z010d.dts

@@ -64,13 +64,19 @@
 			no-map;
 		};
 
-		wcnss_mem: wcnss@8bd00000 {
-			reg = <0x0 0x8bd00000 0x0 0x600000>;
+		gps_mem: gps@8bd00000 {
+			status = "disabled";
+			reg = <0x0 0x8bd00000 0x0 0x200000>;
+			no-map;
+		};
+
+		wcnss_mem: wcnss@8bf00000 {
+			reg = <0x0 0x8bf00000 0x0 0x600000>;
 			no-map;
 		};
 
-		venus_mem: venus@8c300000 {
-			reg = <0x0 0x8c300000 0x0 0x600000>;
+		venus_mem: venus@8c500000 {
+			reg = <0x0 0x8c500000 0x0 0x600000>;
 			no-map;
 		};
 	};

arch/arm64/boot/dts/qcom/msm8916-lg-m216.dts

@@ -29,13 +29,19 @@
 			no-map;
 		};
 
-		wcnss_mem: wcnss@8b200000 {
-			reg = <0x0 0x8b200000 0x0 0x600000>;
+		gps_mem: gps@8b200000 {
+			status = "disabled";
+			reg = <0x0 0x8b200000 0x0 0x200000>;
+			no-map;
+		};
+
+		wcnss_mem: wcnss@8b400000 {
+			reg = <0x0 0x8b400000 0x0 0x600000>;
 			no-map;
 		};
 
-		venus_mem: venus@8b800000 {
-			reg = <0x0 0x8b800000 0x0 0x600000>;
+		venus_mem: venus@8ba00000 {
+			reg = <0x0 0x8ba00000 0x0 0x600000>;
 			no-map;
 		};
 	};

arch/arm64/boot/dts/qcom/msm8916-longcheer-l8150.dts

@@ -55,6 +55,12 @@
 			reg = <0x0 0x8ec00000 0x0 0x5000000>;
 			no-map;
 		};
+
+		gps_mem: gps@93c00000 {
+			status = "disabled";
+			reg = <0x0 0x93c00000 0x0 0x200000>;
+			no-map;
+		};
 	};
 
 	backlight: backlight {

arch/arm64/boot/dts/qcom/msm8916-longcheer-l8910.dts

@@ -32,13 +32,19 @@
 			no-map;
 		};
 
-		wcnss_mem: wcnss@8b800000 {
-			reg = <0x0 0x8b800000 0x0 0x600000>;
+		gps_mem: gps@8b800000 {
+			status = "disabled";
+			reg = <0x0 0x8b800000 0x0 0x200000>;
+			no-map;
+		};
+
+		wcnss_mem: wcnss@8ba00000 {
+			reg = <0x0 0x8ba00000 0x0 0x600000>;
 			no-map;
 		};
 
-		venus_mem: venus@8be00000 {
-			reg = <0x0 0x8be00000 0x0 0x600000>;
+		venus_mem: venus@8c000000 {
+			reg = <0x0 0x8c000000 0x0 0x600000>;
 			no-map;
 		};
 	};

arch/arm64/boot/dts/qcom/msm8916-modem.dtsi

@@ -15,10 +15,22 @@
 	status = "okay";
 };
 
+&gps_mem {
+	status = "okay";
+};
+
 &lpass {
 	status = "disabled";
 };
 
+&memshare {
+	status = "okay";
+};
+
+&memshare_gps {
+	memory-region = <&gps_mem>;
+};
+
 &mpss {
 	status = "okay";
 };

arch/arm64/boot/dts/qcom/msm8916-motorola-harpia.dts

@@ -31,13 +31,19 @@
 			no-map;
 		};
 
-		wcnss_mem: wcnss@8bd00000 {
-			reg = <0x0 0x8bd00000 0x0 0x600000>;
+		gps_mem: gps@8bd00000 {
+			status = "disabled";
+			reg = <0x0 0x8bd00000 0x0 0x200000>;
+			no-map;
+		};
+
+		wcnss_mem: wcnss@8bf00000 {
+			reg = <0x0 0x8bf00000 0x0 0x600000>;
 			no-map;
 		};
 
-		venus_mem: venus@8c300000 {
-			reg = <0x0 0x8c300000 0x0 0x600000>;
+		venus_mem: venus@8c500000 {
+			reg = <0x0 0x8c500000 0x0 0x600000>;
 			no-map;
 		};
 	};

arch/arm64/boot/dts/qcom/msm8916-motorola-osprey.dts

@@ -32,13 +32,19 @@
 			no-map;
 		};
 
-		wcnss_mem: wcnss@8bd00000 {
-			reg = <0x0 0x8bd00000 0x0 0x600000>;
+		gps_mem: gps@8bd00000 {
+			status = "disabled";
+			reg = <0x0 0x8bd00000 0x0 0x200000>;
+			no-map;
+		};
+
+		wcnss_mem: wcnss@8bf00000 {
+			reg = <0x0 0x8bf00000 0x0 0x600000>;
 			no-map;
 		};
 
-		venus_mem: venus@8c300000 {
-			reg = <0x0 0x8c300000 0x0 0x600000>;
+		venus_mem: venus@8c500000 {
+			reg = <0x0 0x8c500000 0x0 0x600000>;
 			no-map;
 		};
 	};

arch/arm64/boot/dts/qcom/msm8916-samsung-a2015-common.dtsi

@@ -32,13 +32,19 @@
 			no-map;
 		};
 
-		wcnss_mem: wcnss@8bc00000 {
-			reg = <0x0 0x8bc00000 0x0 0x600000>;
+		gps_mem: gps@8bc00000 {
+			status = "disabled";
+			reg = <0x0 0x8bc00000 0x0 0x200000>;
+			no-map;
+		};
+
+		wcnss_mem: wcnss@8be00000 {
+			reg = <0x0 0x8be00000 0x0 0x600000>;
 			no-map;
 		};
 
-		venus_mem: venus@8c200000 {
-			reg = <0x0 0x8c200000 0x0 0x600000>;
+		venus_mem: venus@8c400000 {
+			reg = <0x0 0x8c400000 0x0 0x600000>;
 			no-map;
 		};
 	};

arch/arm64/boot/dts/qcom/msm8916-wingtech-wt86518-modem.dts

@@ -1,3 +1,6 @@
 // SPDX-License-Identifier: GPL-2.0-only
 #include "msm8916-wingtech-wt86518.dts"
 #include "msm8916-wingtech-wt865x8-modem.dtsi"
+
+&memshare { status = "disabled"; };
+&gps_mem { status = "disabled"; };

arch/arm64/boot/dts/qcom/msm8916-wingtech-wt865x8.dtsi

@@ -25,13 +25,19 @@
 			no-map;
 		};
 
-		wcnss_mem: wcnss@8bd00000 {
-			reg = <0x0 0x8bd00000 0x0 0x600000>;
+		gps_mem: gps@8bd00000 {
+			status = "disabled";
+			reg = <0x0 0x8bd00000 0x0 0x200000>;
+			no-map;
+		};
+
+		wcnss_mem: wcnss@8bf00000 {
+			reg = <0x0 0x8bf00000 0x0 0x600000>;
 			no-map;
 		};
 
-		venus_mem: venus@8c300000 {
-			reg = <0x0 0x8c300000 0x0 0x600000>;
+		venus_mem: venus@8c500000 {
+			reg = <0x0 0x8c500000 0x0 0x600000>;
 			no-map;
 		};
 	};

arch/arm64/boot/dts/qcom/msm8916-wingtech-wt88047-modem.dts

@@ -2,6 +2,17 @@
 #include "msm8916-wingtech-wt88047.dts"
 #include "msm8916-modem.dtsi"
 
+/*
+ * The modem firmware sends a "query_size" memshare request for client ID 1,
+ * but basically does not do anything with it. GPS works only if:
+ *   - Memshare is not present or
+ *   - Memshare replies to the request with an error
+ * Overall it seems pointless to enable memshare for this device.
+ */
+&memshare {
+	status = "disabled";
+};
+
 &sound {
 	/delete-node/ dai-link-primary;
 	/delete-node/ dai-link-tertiary;

arch/arm64/boot/dts/qcom/msm8916-wingtech-wt88047.dts

@@ -26,7 +26,7 @@
 		/delete-node/ wcnss@89300000;
 		/delete-node/ venus@89900000;
 
-		mpss_mem: mpss@86800000 {
+		mpss_mem: gps_mem: mpss@86800000 {
 			status = "disabled";
 			reg = <0x0 0x86800000 0x0 0x5100000>;
 			no-map;