universal7885: parts: Implement swap on /data ctrl

universal7885-common/hardware/interfaces/hardware/parts/1.0/Android.bp

@@ -6,6 +6,7 @@ hidl_interface {
        "IBatteryStats.hal",
        "IFlashBrightness.hal",
        "IDisplayConfigs.hal",
+       "ISwapOnData.hal",
     ],
     interfaces: [ "android.hidl.base@1.0" ],
     gen_java: false,

universal7885-common/hardware/interfaces/hardware/parts/1.0/ISwapOnData.hal

@@ -0,0 +1,21 @@
+// Copyright (C) 2021 Eureka Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package vendor.eureka.hardware.parts@1.0;
+
+interface ISwapOnData {
+	setSwapSize(int32_t size /* Size in megabytes */);
+	setSwapOn();
+	setSwapOff();
+};

universal7885-common/hardware/interfaces/hardware/parts/1.0/default/Android.bp

@@ -7,7 +7,8 @@ cc_binary {
         "Battery.cpp",
         "FlashLight.cpp",
         "Display.cpp",
-	"service.cpp",
+        "Swap.cpp",
+        "service.cpp",
     ],
     shared_libs: [
         "libhidlbase",

universal7885-common/hardware/interfaces/hardware/parts/1.0/default/Swap.cpp

@@ -0,0 +1,52 @@
+// Copyright (C) 2021 Eureka Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "Swap.h"
+#include <fstream>
+#include <iostream>
+
+static int mSwapSize = 100;
+
+#define SWAP_PATH "/data/swap/swapfile"
+using namespace std;
+namespace vendor::eureka::hardware::parts::V1_0 {
+
+Return<void> SwapOnData::setSwapSize(int32_t size) {
+  mSwapSize = size;
+  return Void();
+}
+
+Return<void> SwapOnData::setSwapOn(){
+	string cmd = string("dd if=/dev/zero of=") + string(SWAP_PATH) + string(" bs=") + std::to_string(mSwapSize) 
+		+ " count=10";
+	system(cmd.c_str());
+	cmd = string("mkswap ") + string(SWAP_PATH);
+	system(cmd.c_str());
+	cmd = string("swapon ") + string(SWAP_PATH);
+	system(cmd.c_str());
+	return Void();
+}
+
+Return<void> SwapOnData::setSwapOff(){
+	std::string cmd = string("swapoff ") + string(SWAP_PATH);
+	system(cmd.c_str());
+	cmd = string("rm ") + string(SWAP_PATH);
+	system(cmd.c_str());
+	return Void();
+}
+
+ISwapOnData *SwapOnData::getInstance(void) {
+  return new SwapOnData();
+}
+} // namespace vendor::eureka::hardware::parts::V1_0

universal7885-common/hardware/interfaces/hardware/parts/1.0/default/Swap.h

@@ -0,0 +1,40 @@
+// Copyright (C) 2021 Eureka Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#pragma once
+
+#include <hidl/MQDescriptor.h>
+#include <hidl/Status.h>
+#include <vendor/eureka/hardware/parts/1.0/ISwapOnData.h>
+
+namespace vendor::eureka::hardware::parts::V1_0 {
+
+using ::android::sp;
+using ::android::hardware::hidl_array;
+using ::android::hardware::hidl_memory;
+using ::android::hardware::hidl_string;
+using ::android::hardware::hidl_vec;
+using ::android::hardware::Return;
+using ::android::hardware::Void;
+
+struct SwapOnData : public ISwapOnData {
+  // Methods from ::vendor::eureka::hardware::parts::V1_0::ISwapOnData
+  // follow.
+  Return<void> setSwapSize(int32_t size);
+  Return<void> setSwapOn();
+  Return<void> setSwapOff();
+  // Methods from ::android::hidl::base::V2_0::IBase follow.
+  static ISwapOnData *getInstance(void);
+};
+} // namespace vendor::eureka::hardware::parts::V1_0

universal7885-common/hardware/interfaces/hardware/parts/1.0/default/service.cpp

@@ -18,10 +18,12 @@
 #include <vendor/eureka/hardware/parts/1.0/IBatteryStats.h>
 #include <vendor/eureka/hardware/parts/1.0/IDisplayConfigs.h>
 #include <vendor/eureka/hardware/parts/1.0/IFlashBrightness.h>
+#include <vendor/eureka/hardware/parts/1.0/ISwapOnData.h>
 
 #include "Battery.h"
 #include "Display.h"
 #include "FlashLight.h"
+#include "Swap.h"
 
 using android::sp;
 using android::hardware::configureRpcThreadpool;
@@ -29,9 +31,11 @@ using android::hardware::joinRpcThreadpool;
 using vendor::eureka::hardware::parts::V1_0::BatteryStats;
 using vendor::eureka::hardware::parts::V1_0::DisplayConfigs;
 using vendor::eureka::hardware::parts::V1_0::FlashBrightness;
+using vendor::eureka::hardware::parts::V1_0::SwapOnData;
 using vendor::eureka::hardware::parts::V1_0::IBatteryStats;
 using vendor::eureka::hardware::parts::V1_0::IDisplayConfigs;
 using vendor::eureka::hardware::parts::V1_0::IFlashBrightness;
+using vendor::eureka::hardware::parts::V1_0::ISwapOnData;
 
 int main() {
   int ret;
@@ -39,6 +43,7 @@ int main() {
   android::sp<IFlashBrightness> mFlashLightService =
       FlashBrightness::getInstance();
   android::sp<IDisplayConfigs> mDisplayService = DisplayConfigs::getInstance();
+  android::sp<ISwapOnData> mSwapService = SwapOnData::getInstance();
   configureRpcThreadpool(4, true /*callerWillJoin*/);
 
   if (mBatteryService != nullptr) {
@@ -71,6 +76,16 @@ int main() {
   } else {
     ALOGE("Can't create instance of Display HAL, nullptr");
   }
+  if (mSwapService != nullptr) {
+    ret = mSwapService->registerAsService();
+    if (ret != 0) {
+      ALOGE("Can't register instance of Swap HAL, nullptr");
+    } else {
+      ALOGI("registered Swap HAL");
+    }
+  } else {
+    ALOGE("Can't create instance of Swap HAL, nullptr");
+  }
   joinRpcThreadpool();
 
   return -1; // should never get here

universal7885-common/hardware/interfaces/hardware/parts/1.0/default/vendor.eureka.hardware.parts@1.0-service.rc

@@ -2,6 +2,7 @@ service vendor.parts-hal /vendor/bin/vendor.eureka.hardware.parts@1.0-service
     interface vendor.eureka.hardware.parts@1.0::IBatteryStats default
     interface vendor.eureka.hardware.parts@1.0::IDisplayConfigs default
     interface vendor.eureka.hardware.parts@1.0::IFlashBrightness default
+    interface vendor.eureka.hardware.parts@1.0::ISwapOnData default
     class hal
     user root
     group root

universal7885-common/hardware/interfaces/hardware/parts/1.0/default/vendor.eureka.hardware.parts@1.0.xml

@@ -16,5 +16,9 @@
 			<name>IDisplayConfigs</name>
 			<instance>default</instance>
 		</interface>
+		<interface>
+			<name>ISwapOnData</name>
+			<instance>default</instance>
+		</interface>
 	</hal>
 </manifest>