Move slider into gs101 and <device>

from: 026342771c6642980cb4653b1ec4d857a5d8be54

Bug: 167996145
Change-Id: I2ebf7f019afed1cbe9b60dcd82581bd3a52fe109

powerstats/RailDataProvider.cpp

@@ -0,0 +1,340 @@
+/*
+ * Copyright (C) 2018 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 "libpixelpowerstats"
+
+#include "RailDataProvider.h"
+
+#include <android-base/file.h>
+#include <android-base/logging.h>
+#include <android-base/properties.h>
+#include <android-base/stringprintf.h>
+#include <android-base/strings.h>
+#include <inttypes.h>
+#include <stdlib.h>
+
+#include <algorithm>
+#include <exception>
+#include <thread>
+
+namespace android {
+namespace hardware {
+namespace google {
+namespace pixel {
+namespace powerstats {
+
+#define MAX_FILE_PATH_LEN 128
+#define MAX_DEVICE_NAME_LEN 64
+#define MAX_QUEUE_SIZE 8192
+
+constexpr char kIioDirRoot[] = "/sys/bus/iio/devices/";
+const char *const kDeviceNames[] = {"s2mpg10-odpm", "s2mpg11-odpm"};
+constexpr char kDeviceType[] = "iio:device";
+constexpr uint32_t MAX_SAMPLING_RATE = 10;
+constexpr uint64_t WRITE_TIMEOUT_NS = 1000000000;
+
+#define MAX_RAIL_NAME_LEN 50
+#define STR(s) #s
+#define XSTR(s) STR(s)
+
+void RailDataProvider::findIioPowerMonitorNodes() {
+    struct dirent *ent;
+    int fd;
+    char devName[MAX_DEVICE_NAME_LEN];
+    char filePath[MAX_FILE_PATH_LEN];
+    DIR *iioDir = opendir(kIioDirRoot);
+    if (!iioDir) {
+        ALOGE("Error opening directory: %s, error: %d", kIioDirRoot, errno);
+        return;
+    }
+    while (ent = readdir(iioDir), ent) {
+        if (strcmp(ent->d_name, ".") != 0 && strcmp(ent->d_name, "..") != 0 &&
+                strlen(ent->d_name) > strlen(kDeviceType) &&
+                strncmp(ent->d_name, kDeviceType, strlen(kDeviceType)) == 0) {
+            snprintf(filePath, MAX_FILE_PATH_LEN, "%s/%s", ent->d_name, "name");
+            fd = openat(dirfd(iioDir), filePath, O_RDONLY);
+            if (fd < 0) {
+                ALOGW("Failed to open directory: %s, error: %d", filePath, errno);
+                continue;
+            }
+            if (read(fd, devName, MAX_DEVICE_NAME_LEN) < 0) {
+                ALOGW("Failed to read device name from file: %s(%d)", filePath, fd);
+                close(fd);
+                continue;
+            }
+
+            for (const auto &kDeviceName : kDeviceNames) {
+                if (strncmp(devName, kDeviceName, strlen(kDeviceName)) == 0) {
+                    snprintf(filePath, MAX_FILE_PATH_LEN, "%s/%s", kIioDirRoot, ent->d_name);
+                    mOdpm.devicePaths.push_back(filePath);
+                }
+            }
+            close(fd);
+        }
+    }
+    closedir(iioDir);
+    return;
+}
+
+size_t RailDataProvider::parsePowerRails() {
+    std::string data;
+    std::string railFileName;
+    std::string spsFileName;
+    uint32_t index = 0;
+    uint32_t samplingRate;
+    for (const auto &path : mOdpm.devicePaths) {
+        railFileName = path + "/enabled_rails";
+        spsFileName = path + "/sampling_rate";
+        if (!android::base::ReadFileToString(spsFileName, &data)) {
+            ALOGW("Error reading file: %s", spsFileName.c_str());
+            continue;
+        }
+        samplingRate = strtoul(data.c_str(), NULL, 10);
+        if (!samplingRate || samplingRate == ULONG_MAX) {
+            ALOGE("Error parsing: %s", spsFileName.c_str());
+            break;
+        }
+        if (!android::base::ReadFileToString(railFileName, &data)) {
+            ALOGW("Error reading file: %s", railFileName.c_str());
+            continue;
+        }
+        std::istringstream railNames(data);
+        std::string line;
+        while (std::getline(railNames, line)) {
+            std::vector<std::string> words = android::base::Split(line, ":][");
+            if (words.size() == 4) {
+                const std::string channelName = words[1];
+                if (mOdpm.railsInfo.count(channelName) == 0) {
+                    const std::string subsysName = words[3];
+                    mOdpm.railsInfo.emplace(channelName, RailData{.devicePath = path,
+                                                            .index = index,
+                                                            .subsysName = subsysName,
+                                                            .samplingRate = samplingRate});
+                    index++;
+                } else {
+                    ALOGW("There exists rails with the same name (not supported): %s." \
+                        " Only the last occurrence of rail energy will be provided.",
+                        channelName.c_str());
+                }
+            } else {
+                ALOGW("Unexpected format in file: %s", railFileName.c_str());
+            }
+        }
+    }
+    return index;
+}
+
+int RailDataProvider::parseIioEnergyNodeString(const std::string &contents, OnDeviceMmt &odpm) {
+    std::istringstream energyData(contents);
+    std::string line;
+
+    int ret = 0;
+    uint64_t timestamp = 0;
+    bool timestampRead = false;
+
+    while (std::getline(energyData, line)) {
+        bool parseLineSuccess = false;
+
+        if (timestampRead == false) {
+            /* Read timestamp from boot (ms) */
+            if (sscanf(line.c_str(), "t=%" PRIu64, &timestamp) == 1) {
+                if (timestamp == 0 || timestamp == ULLONG_MAX) {
+                    ALOGW("Potentially wrong timestamp: %" PRIu64, timestamp);
+                }
+                timestampRead = true;
+                parseLineSuccess = true;
+            }
+
+        } else {
+            /* Read rail energy */
+            uint64_t energy = 0;
+            char railNameRaw[MAX_RAIL_NAME_LEN + 1];
+            if (sscanf(line.c_str(),
+                       "CH%*d(T=%*" PRIu64 ")[%" XSTR(MAX_RAIL_NAME_LEN) "[^]]], %" PRIu64,
+                       railNameRaw, &energy) == 2) {
+                std::string railName(railNameRaw);
+
+                /* If the count == 0, the rail may not be enabled */
+                /* The count cannot be > 1; mChannelIds is a map */
+                if (odpm.railsInfo.count(railName) == 1) {
+                    size_t index = odpm.railsInfo[railName].index;
+                    odpm.reading[index].index = index;
+                    odpm.reading[index].timestamp = timestamp;
+                    odpm.reading[index].energy = energy;
+                    if (odpm.reading[index].energy == ULLONG_MAX) {
+                        ALOGW("Potentially wrong energy value on rail: %s", railName.c_str());
+                    }
+                }
+                parseLineSuccess = true;
+            }
+        }
+
+        if (parseLineSuccess == false) {
+            ret = -1;
+            break;
+        }
+    }
+
+    return ret;
+}
+
+int RailDataProvider::parseIioEnergyNode(std::string devName) {
+    int ret;
+    std::string data;
+    std::string fileName = devName + "/energy_value";
+    if (!android::base::ReadFileToString(fileName, &data)) {
+        ALOGE("Error reading file: %s", fileName.c_str());
+        return -1;
+    }
+
+    ret = parseIioEnergyNodeString(data, mOdpm);
+    if (ret != 0) {
+        ALOGW("Unexpected format in file: %s", fileName.c_str());
+    }
+    return ret;
+}
+
+Status RailDataProvider::parseIioEnergyNodes() {
+    Status ret = Status::SUCCESS;
+    if (mOdpm.hwEnabled == false) {
+        return Status::NOT_SUPPORTED;
+    }
+
+    for (const auto &devicePath : mOdpm.devicePaths) {
+        if (parseIioEnergyNode(devicePath) < 0) {
+            ALOGE("Error in parsing power stats");
+            ret = Status::FILESYSTEM_ERROR;
+            break;
+        }
+    }
+    return ret;
+}
+
+RailDataProvider::RailDataProvider() {
+    findIioPowerMonitorNodes();
+    size_t numRails = parsePowerRails();
+    if (mOdpm.devicePaths.empty() || numRails == 0) {
+        mOdpm.hwEnabled = false;
+    } else {
+        mOdpm.hwEnabled = true;
+        mOdpm.reading.resize(numRails);
+    }
+}
+
+Return<void> RailDataProvider::getRailInfo(IPowerStats::getRailInfo_cb _hidl_cb) {
+    hidl_vec<RailInfo> rInfo;
+    Status ret = Status::SUCCESS;
+    size_t index;
+    std::lock_guard<std::mutex> _lock(mOdpm.mLock);
+    if (mOdpm.hwEnabled == false) {
+        ALOGI("getRailInfo not supported");
+        _hidl_cb(rInfo, Status::NOT_SUPPORTED);
+        return Void();
+    }
+    rInfo.resize(mOdpm.railsInfo.size());
+    for (const auto &railData : mOdpm.railsInfo) {
+        index = railData.second.index;
+        rInfo[index].railName = railData.first;
+        rInfo[index].subsysName = railData.second.subsysName;
+        rInfo[index].index = index;
+        rInfo[index].samplingRate = railData.second.samplingRate;
+    }
+    _hidl_cb(rInfo, ret);
+    return Void();
+}
+
+Return<void> RailDataProvider::getEnergyData(const hidl_vec<uint32_t> &railIndices,
+                                             IPowerStats::getEnergyData_cb _hidl_cb) {
+    hidl_vec<EnergyData> eVal;
+    std::lock_guard<std::mutex> _lock(mOdpm.mLock);
+    Status ret = parseIioEnergyNodes();
+
+    if (ret != Status::SUCCESS) {
+        ALOGE("Failed to getEnergyData");
+        _hidl_cb(eVal, ret);
+        return Void();
+    }
+
+    if (railIndices.size() == 0) {
+        eVal.resize(mOdpm.railsInfo.size());
+        memcpy(&eVal[0], &mOdpm.reading[0], mOdpm.reading.size() * sizeof(EnergyData));
+    } else {
+        eVal.resize(railIndices.size());
+        int i = 0;
+        for (const auto &railIndex : railIndices) {
+            if (railIndex >= mOdpm.reading.size()) {
+                ret = Status::INVALID_INPUT;
+                eVal.resize(0);
+                break;
+            }
+            memcpy(&eVal[i], &mOdpm.reading[railIndex], sizeof(EnergyData));
+            i++;
+        }
+    }
+    _hidl_cb(eVal, ret);
+    return Void();
+}
+
+Return<void> RailDataProvider::streamEnergyData(uint32_t timeMs, uint32_t samplingRate,
+                                                IPowerStats::streamEnergyData_cb _hidl_cb) {
+    std::lock_guard<std::mutex> _lock(mOdpm.mLock);
+    if (mOdpm.fmqSynchronized != nullptr) {
+        _hidl_cb(MessageQueueSync::Descriptor(), 0, 0, Status::INSUFFICIENT_RESOURCES);
+        return Void();
+    }
+    uint32_t sps = std::min(samplingRate, MAX_SAMPLING_RATE);
+    uint32_t numSamples = timeMs * sps / 1000;
+    mOdpm.fmqSynchronized.reset(new (std::nothrow) MessageQueueSync(MAX_QUEUE_SIZE, true));
+    if (mOdpm.fmqSynchronized == nullptr || mOdpm.fmqSynchronized->isValid() == false) {
+        mOdpm.fmqSynchronized = nullptr;
+        _hidl_cb(MessageQueueSync::Descriptor(), 0, 0, Status::INSUFFICIENT_RESOURCES);
+        return Void();
+    }
+    std::thread pollThread = std::thread([this, sps, numSamples]() {
+        uint64_t sleepTimeUs = 1000000 / sps;
+        uint32_t currSamples = 0;
+        while (currSamples < numSamples) {
+            mOdpm.mLock.lock();
+            if (parseIioEnergyNodes() == Status::SUCCESS) {
+                mOdpm.fmqSynchronized->writeBlocking(&mOdpm.reading[0], mOdpm.reading.size(),
+                                                     WRITE_TIMEOUT_NS);
+                mOdpm.mLock.unlock();
+                currSamples++;
+                if (usleep(sleepTimeUs) < 0) {
+                    ALOGW("Sleep interrupted");
+                    break;
+                }
+            } else {
+                mOdpm.mLock.unlock();
+                break;
+            }
+        }
+        mOdpm.mLock.lock();
+        mOdpm.fmqSynchronized = nullptr;
+        mOdpm.mLock.unlock();
+        return;
+    });
+    pollThread.detach();
+    _hidl_cb(*(mOdpm.fmqSynchronized)->getDesc(), numSamples, mOdpm.reading.size(),
+             Status::SUCCESS);
+    return Void();
+}
+
+}  // namespace powerstats
+}  // namespace pixel
+}  // namespace google
+}  // namespace hardware
+}  // namespace android