Merge "Move android.hardware.health@2.0-impl to hardware/interfaces" (f6fb84e0) · Commits · e / os / android_hardware_interfaces

health/2.0/default/Android.bp

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		cc_library_static {
		name: "android.hardware.health@2.0-impl",
		vendor_available: true,
		srcs: [
		"Health.cpp",
		"healthd_common.cpp",
		],

		cflags: ["-DHEALTHD_USE_HEALTH_2_0"],

		export_include_dirs: ["include"],

		shared_libs: [
		"libbase",
		"libhidlbase",
		"libhidltransport",
		"libhwbinder",
		"liblog",
		"libutils",
		"libcutils",
		"android.hardware.health@2.0",
		],

		static_libs: [
		"libbatterymonitor",
		"android.hardware.health@1.0-convert",
		],
		}

health/2.0/default/Health.cpp

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		#define LOG_TAG "android.hardware.health@2.0-impl"
		#include <android-base/logging.h>

		#include <health2/Health.h>

		#include <hidl/HidlTransportSupport.h>

		extern void healthd_battery_update_internal(bool);

		namespace android {
		namespace hardware {
		namespace health {
		namespace V2_0 {
		namespace implementation {

		sp<Health> Health::instance_;

		Health::Health(struct healthd_config* c) {
		// TODO(b/69268160): remove when libhealthd is removed.
		healthd_board_init(c);
		battery_monitor_ = std::make_unique<BatteryMonitor>();
		battery_monitor_->init(c);
		}

		// Methods from IHealth follow.
		Return<Result> Health::registerCallback(const sp<IHealthInfoCallback>& callback) {
		if (callback == nullptr) {
		return Result::SUCCESS;
		}

		{
		std::lock_guard<std::mutex> _lock(callbacks_lock_);
		callbacks_.push_back(callback);
		// unlock
		}

		auto linkRet = callback->linkToDeath(this, 0u /* cookie */);
		if (!linkRet.withDefault(false)) {
		LOG(WARNING) << __func__ << "Cannot link to death: "
		<< (linkRet.isOk() ? "linkToDeath returns false" : linkRet.description());
		// ignore the error
		}

		return update();
		}

		bool Health::unregisterCallbackInternal(const sp<IBase>& callback) {
		if (callback == nullptr) return false;

		bool removed = false;
		std::lock_guard<std::mutex> _lock(callbacks_lock_);
		for (auto it = callbacks_.begin(); it != callbacks_.end();) {
		if (interfacesEqual(*it, callback)) {
		it = callbacks_.erase(it);
		removed = true;
		} else {
		++it;
		}
		}
		(void)callback->unlinkToDeath(this).isOk(); // ignore errors
		return removed;
		}

		Return<Result> Health::unregisterCallback(const sp<IHealthInfoCallback>& callback) {
		return unregisterCallbackInternal(callback) ? Result::SUCCESS : Result::NOT_FOUND;
		}

		template <typename T>
		void getProperty(const std::unique_ptr<BatteryMonitor>& monitor, int id, T defaultValue,
		const std::function<void(Result, T)>& callback) {
		struct BatteryProperty prop;
		T ret = defaultValue;
		Result result = Result::SUCCESS;
		status_t err = monitor->getProperty(static_cast<int>(id), &prop);
		if (err != OK) {
		LOG(DEBUG) << "getProperty(" << id << ")"
		<< " fails: (" << err << ") " << strerror(-err);
		} else {
		ret = static_cast<T>(prop.valueInt64);
		}
		switch (err) {
		case OK:
		result = Result::SUCCESS;
		break;
		case NAME_NOT_FOUND:
		result = Result::NOT_SUPPORTED;
		break;
		default:
		result = Result::UNKNOWN;
		break;
		}
		callback(result, static_cast<T>(ret));
		}

		Return<void> Health::getChargeCounter(getChargeCounter_cb _hidl_cb) {
		getProperty(battery_monitor_, BATTERY_PROP_CHARGE_COUNTER, INT32_MIN, _hidl_cb);
		return Void();
		}

		Return<void> Health::getCurrentNow(getCurrentNow_cb _hidl_cb) {
		getProperty(battery_monitor_, BATTERY_PROP_CURRENT_NOW, INT32_MIN, _hidl_cb);
		return Void();
		}

		Return<void> Health::getCurrentAverage(getCurrentAverage_cb _hidl_cb) {
		getProperty(battery_monitor_, BATTERY_PROP_CURRENT_AVG, INT32_MIN, _hidl_cb);
		return Void();
		}

		Return<void> Health::getCapacity(getCapacity_cb _hidl_cb) {
		getProperty(battery_monitor_, BATTERY_PROP_CAPACITY, INT32_MIN, _hidl_cb);
		return Void();
		}

		Return<void> Health::getEnergyCounter(getEnergyCounter_cb _hidl_cb) {
		getProperty(battery_monitor_, BATTERY_PROP_ENERGY_COUNTER, INT64_MIN, _hidl_cb);
		return Void();
		}

		Return<void> Health::getChargeStatus(getChargeStatus_cb _hidl_cb) {
		getProperty(battery_monitor_, BATTERY_PROP_BATTERY_STATUS, BatteryStatus::UNKNOWN, _hidl_cb);
		return Void();
		}

		Return<Result> Health::update() {
		if (!healthd_mode_ops \|\| !healthd_mode_ops->battery_update) {
		LOG(WARNING) << "health@2.0: update: not initialized. "
		<< "update() should not be called in charger / recovery.";
		return Result::UNKNOWN;
		}

		// Retrieve all information and call healthd_mode_ops->battery_update, which calls
		// notifyListeners.
		bool chargerOnline = battery_monitor_->update();

		// adjust uevent / wakealarm periods
		healthd_battery_update_internal(chargerOnline);

		return Result::SUCCESS;
		}

		void Health::notifyListeners(const HealthInfo& info) {
		std::lock_guard<std::mutex> _lock(callbacks_lock_);
		for (auto it = callbacks_.begin(); it != callbacks_.end();) {
		auto ret = (*it)->healthInfoChanged(info);
		if (!ret.isOk() && ret.isDeadObject()) {
		it = callbacks_.erase(it);
		} else {
		++it;
		}
		}
		}

		Return<void> Health::debug(const hidl_handle& handle, const hidl_vec<hidl_string>&) {
		if (handle != nullptr && handle->numFds >= 1) {
		int fd = handle->data[0];
		battery_monitor_->dumpState(fd);
		fsync(fd);
		}
		return Void();
		}

		void Health::serviceDied(uint64_t /* cookie */, const wp<IBase>& who) {
		(void)unregisterCallbackInternal(who.promote());
		}

		sp<IHealth> Health::initInstance(struct healthd_config* c) {
		if (instance_ == nullptr) {
		instance_ = new Health(c);
		}
		return instance_;
		}

		sp<Health> Health::getImplementation() {
		CHECK(instance_ != nullptr);
		return instance_;
		}

		} // namespace implementation
		} // namespace V2_0
		} // namespace health
		} // namespace hardware
		} // namespace android

health/2.0/default/healthd_common.cpp

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		/*
		* Copyright (C) 2013 The Android Open Source Project
		*
		* 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.
		*/

		#define LOG_TAG "android.hardware.health@2.0-impl"
		#define KLOG_LEVEL 6

		#include <healthd/BatteryMonitor.h>
		#include <healthd/healthd.h>

		#include <batteryservice/BatteryService.h>
		#include <cutils/klog.h>
		#include <cutils/uevent.h>
		#include <errno.h>
		#include <libgen.h>
		#include <stdio.h>
		#include <stdlib.h>
		#include <string.h>
		#include <sys/epoll.h>
		#include <sys/timerfd.h>
		#include <unistd.h>
		#include <utils/Errors.h>

		#include <health2/Health.h>

		using namespace android;

		// Periodic chores fast interval in seconds
		#define DEFAULT_PERIODIC_CHORES_INTERVAL_FAST (60 * 1)
		// Periodic chores fast interval in seconds
		#define DEFAULT_PERIODIC_CHORES_INTERVAL_SLOW (60 * 10)

		static struct healthd_config healthd_config = {
		.periodic_chores_interval_fast = DEFAULT_PERIODIC_CHORES_INTERVAL_FAST,
		.periodic_chores_interval_slow = DEFAULT_PERIODIC_CHORES_INTERVAL_SLOW,
		.batteryStatusPath = String8(String8::kEmptyString),
		.batteryHealthPath = String8(String8::kEmptyString),
		.batteryPresentPath = String8(String8::kEmptyString),
		.batteryCapacityPath = String8(String8::kEmptyString),
		.batteryVoltagePath = String8(String8::kEmptyString),
		.batteryTemperaturePath = String8(String8::kEmptyString),
		.batteryTechnologyPath = String8(String8::kEmptyString),
		.batteryCurrentNowPath = String8(String8::kEmptyString),
		.batteryCurrentAvgPath = String8(String8::kEmptyString),
		.batteryChargeCounterPath = String8(String8::kEmptyString),
		.batteryFullChargePath = String8(String8::kEmptyString),
		.batteryCycleCountPath = String8(String8::kEmptyString),
		.energyCounter = NULL,
		.boot_min_cap = 0,
		.screen_on = NULL,
		};

		static int eventct;
		static int epollfd;

		#define POWER_SUPPLY_SUBSYSTEM "power_supply"

		// epoll_create() parameter is actually unused
		#define MAX_EPOLL_EVENTS 40
		static int uevent_fd;
		static int wakealarm_fd;

		// -1 for no epoll timeout
		static int awake_poll_interval = -1;

		static int wakealarm_wake_interval = DEFAULT_PERIODIC_CHORES_INTERVAL_FAST;

		using ::android::hardware::health::V2_0::implementation::Health;

		struct healthd_mode_ops* healthd_mode_ops = nullptr;

		int healthd_register_event(int fd, void (*handler)(uint32_t), EventWakeup wakeup) {
		struct epoll_event ev;

		ev.events = EPOLLIN;

		if (wakeup == EVENT_WAKEUP_FD) ev.events \|= EPOLLWAKEUP;

		ev.data.ptr = (void*)handler;
		if (epoll_ctl(epollfd, EPOLL_CTL_ADD, fd, &ev) == -1) {
		KLOG_ERROR(LOG_TAG, "epoll_ctl failed; errno=%d\n", errno);
		return -1;
		}

		eventct++;
		return 0;
		}

		static void wakealarm_set_interval(int interval) {
		struct itimerspec itval;

		if (wakealarm_fd == -1) return;

		wakealarm_wake_interval = interval;

		if (interval == -1) interval = 0;

		itval.it_interval.tv_sec = interval;
		itval.it_interval.tv_nsec = 0;
		itval.it_value.tv_sec = interval;
		itval.it_value.tv_nsec = 0;

		if (timerfd_settime(wakealarm_fd, 0, &itval, NULL) == -1)
		KLOG_ERROR(LOG_TAG, "wakealarm_set_interval: timerfd_settime failed\n");
		}

		void healthd_battery_update_internal(bool charger_online) {
		// Fast wake interval when on charger (watch for overheat);
		// slow wake interval when on battery (watch for drained battery).

		int new_wake_interval = charger_online ? healthd_config.periodic_chores_interval_fast
		: healthd_config.periodic_chores_interval_slow;

		if (new_wake_interval != wakealarm_wake_interval) wakealarm_set_interval(new_wake_interval);

		// During awake periods poll at fast rate. If wake alarm is set at fast
		// rate then just use the alarm; if wake alarm is set at slow rate then
		// poll at fast rate while awake and let alarm wake up at slow rate when
		// asleep.

		if (healthd_config.periodic_chores_interval_fast == -1)
		awake_poll_interval = -1;
		else
		awake_poll_interval = new_wake_interval == healthd_config.periodic_chores_interval_fast
		? -1
		: healthd_config.periodic_chores_interval_fast * 1000;
		}

		static void healthd_battery_update(void) {
		Health::getImplementation()->update();
		}

		static void periodic_chores() {
		healthd_battery_update();
		}

		#define UEVENT_MSG_LEN 2048
		static void uevent_event(uint32_t /epevents/) {
		char msg[UEVENT_MSG_LEN + 2];
		char* cp;
		int n;

		n = uevent_kernel_multicast_recv(uevent_fd, msg, UEVENT_MSG_LEN);
		if (n <= 0) return;
		if (n >= UEVENT_MSG_LEN) /* overflow -- discard */
		return;

		msg[n] = '\0';
		msg[n + 1] = '\0';
		cp = msg;

		while (*cp) {
		if (!strcmp(cp, "SUBSYSTEM=" POWER_SUPPLY_SUBSYSTEM)) {
		healthd_battery_update();
		break;
		}

		/* advance to after the next \0 */
		while (*cp++)
		;
		}
		}

		static void uevent_init(void) {
		uevent_fd = uevent_open_socket(64 * 1024, true);

		if (uevent_fd < 0) {
		KLOG_ERROR(LOG_TAG, "uevent_init: uevent_open_socket failed\n");
		return;
		}

		fcntl(uevent_fd, F_SETFL, O_NONBLOCK);
		if (healthd_register_event(uevent_fd, uevent_event, EVENT_WAKEUP_FD))
		KLOG_ERROR(LOG_TAG, "register for uevent events failed\n");
		}

		static void wakealarm_event(uint32_t /epevents/) {
		unsigned long long wakeups;

		if (read(wakealarm_fd, &wakeups, sizeof(wakeups)) == -1) {
		KLOG_ERROR(LOG_TAG, "wakealarm_event: read wakealarm fd failed\n");
		return;
		}

		periodic_chores();
		}

		static void wakealarm_init(void) {
		wakealarm_fd = timerfd_create(CLOCK_BOOTTIME_ALARM, TFD_NONBLOCK);
		if (wakealarm_fd == -1) {
		KLOG_ERROR(LOG_TAG, "wakealarm_init: timerfd_create failed\n");
		return;
		}

		if (healthd_register_event(wakealarm_fd, wakealarm_event, EVENT_WAKEUP_FD))
		KLOG_ERROR(LOG_TAG, "Registration of wakealarm event failed\n");

		wakealarm_set_interval(healthd_config.periodic_chores_interval_fast);
		}

		static void healthd_mainloop(void) {
		int nevents = 0;
		while (1) {
		struct epoll_event events[eventct];
		int timeout = awake_poll_interval;
		int mode_timeout;

		/* Don't wait for first timer timeout to run periodic chores */
		if (!nevents) periodic_chores();

		healthd_mode_ops->heartbeat();

		mode_timeout = healthd_mode_ops->preparetowait();
		if (timeout < 0 \|\| (mode_timeout > 0 && mode_timeout < timeout)) timeout = mode_timeout;
		nevents = epoll_wait(epollfd, events, eventct, timeout);
		if (nevents == -1) {
		if (errno == EINTR) continue;
		KLOG_ERROR(LOG_TAG, "healthd_mainloop: epoll_wait failed\n");
		break;
		}

		for (int n = 0; n < nevents; ++n) {
		if (events[n].data.ptr) ((void ()(int))events[n].data.ptr)(events[n].events);
		}
		}

		return;
		}

		static int healthd_init() {
		epollfd = epoll_create(MAX_EPOLL_EVENTS);
		if (epollfd == -1) {
		KLOG_ERROR(LOG_TAG, "epoll_create failed; errno=%d\n", errno);
		return -1;
		}

		healthd_mode_ops->init(&healthd_config);
		wakealarm_init();
		uevent_init();

		return 0;
		}

		int healthd_main() {
		int ret;

		klog_set_level(KLOG_LEVEL);

		if (!healthd_mode_ops) {
		KLOG_ERROR("healthd ops not set, exiting\n");
		exit(1);
		}

		ret = healthd_init();
		if (ret) {
		KLOG_ERROR("Initialization failed, exiting\n");
		exit(2);
		}

		healthd_mainloop();
		KLOG_ERROR("Main loop terminated, exiting\n");
		return 3;
		}

health/2.0/default/include/health2/Health.h

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		#ifndef ANDROID_HARDWARE_HEALTH_V2_0_HEALTH_H
		#define ANDROID_HARDWARE_HEALTH_V2_0_HEALTH_H

		#include <memory>
		#include <vector>

		#include <android/hardware/health/1.0/types.h>
		#include <android/hardware/health/2.0/IHealth.h>
		#include <healthd/BatteryMonitor.h>
		#include <hidl/Status.h>

		namespace android {
		namespace hardware {
		namespace health {
		namespace V2_0 {
		namespace implementation {

		using V1_0::BatteryStatus;
		using V1_0::HealthInfo;

		using ::android::hidl::base::V1_0::IBase;

		struct Health : public IHealth, hidl_death_recipient {
		public:
		static sp<IHealth> initInstance(struct healthd_config* c);
		// Should only be called by implementation itself (-impl, -service).
		// Clients should not call this function. Instead, initInstance() initializes and returns the
		// global instance that has fewer functions.
		// TODO(b/62229583): clean up and hide these functions after update() logic is simplified.
		static sp<Health> getImplementation();

		Health(struct healthd_config* c);

		// TODO(b/62229583): clean up and hide these functions after update() logic is simplified.
		void notifyListeners(const HealthInfo& info);

		// Methods from IHealth follow.
		Return<Result> registerCallback(const sp<IHealthInfoCallback>& callback) override;
		Return<Result> unregisterCallback(const sp<IHealthInfoCallback>& callback) override;
		Return<Result> update() override;
		Return<void> getChargeCounter(getChargeCounter_cb _hidl_cb) override;
		Return<void> getCurrentNow(getCurrentNow_cb _hidl_cb) override;
		Return<void> getCurrentAverage(getCurrentAverage_cb _hidl_cb) override;
		Return<void> getCapacity(getCapacity_cb _hidl_cb) override;
		Return<void> getEnergyCounter(getEnergyCounter_cb _hidl_cb) override;
		Return<void> getChargeStatus(getChargeStatus_cb _hidl_cb) override;

		// Methods from ::android::hidl::base::V1_0::IBase follow.
		Return<void> debug(const hidl_handle& fd, const hidl_vec<hidl_string>& args) override;

		void serviceDied(uint64_t cookie, const wp<IBase>& /* who */) override;

		private:
		static sp<Health> instance_;

		std::mutex callbacks_lock_;
		std::vector<sp<IHealthInfoCallback>> callbacks_;
		std::unique_ptr<BatteryMonitor> battery_monitor_;

		bool unregisterCallbackInternal(const sp<IBase>& cb);
		};

		} // namespace implementation
		} // namespace V2_0
		} // namespace health
		} // namespace hardware
		} // namespace android

		#endif // ANDROID_HARDWARE_HEALTH_V2_0_HEALTH_H