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/*
* Copyright (C) 2021 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.
*/
#include "UfsStateResidencyDataProvider.h"
#include <android-base/logging.h>
#include <android-base/parseint.h>
#include <android-base/strings.h>
#include <string>
#include <utility>
using android::base::ParseInt;
using android::base::Split;
using android::base::StartsWith;
using android::base::Trim;
namespace aidl {
namespace android {
namespace hardware {
namespace power {
namespace stats {
const int32_t HIBERNATE_STATE_ID = 0;
const std::string UFS_NAME = "UFS";
UfsStateResidencyDataProvider::UfsStateResidencyDataProvider(std::string prefix) : kPrefix(prefix) {}
bool UfsStateResidencyDataProvider::getStateResidencies(
std::unordered_map<std::string, std::vector<StateResidency>> *residencies) {
StateResidency residency;
residency.id = HIBERNATE_STATE_ID;
// The transform function converts microseconds to milliseconds.
std::function<uint64_t(uint64_t)> usecToMs = [](uint64_t a) { return a / 1000; };
residency.totalTimeInStateMs = usecToMs(readStat(kPrefix + "hibern8_total_us"));
residency.totalStateEntryCount = readStat(kPrefix + "hibern8_exit_cnt");
residency.lastEntryTimestampMs = usecToMs(readStat(kPrefix + "last_hibern8_enter_time"));
residencies->emplace(UFS_NAME, std::vector<StateResidency>{residency});
return true;
}
std::unordered_map<std::string, std::vector<State>> UfsStateResidencyDataProvider::getInfo() {
return {{UFS_NAME, std::vector<State>{{HIBERNATE_STATE_ID, "HIBERN8"}} }};
}
int64_t UfsStateResidencyDataProvider::readStat(std::string path) {
std::unique_ptr<FILE, decltype(&fclose)> fp(fopen(path.c_str(), "r"), fclose);
if (!fp) {
PLOG(ERROR) << __func__ << ":Failed to open file " << path
<< " Error = " << strerror(errno);
return 0;
}
const size_t size = 20;
char buf[size];
(void)fread(&buf, sizeof(char), size, fp.get());
int64_t ret;
if (!ParseInt(Trim(std::string(buf)), &ret)) {
LOG(ERROR) << "Failed to parse int64 from [" << std::string(buf) << "]";
}
return ret;
}
} // namespace stats
} // namespace power
} // namespace hardware
} // namespace android
} // namespace aidl
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