/*
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* Copyright (C) 2016 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "SensorDevice.h"
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#include "SensorDirectConnection.h"
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#include <hardware/sensors.h>
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#define UNUSED(x) (void)(x)
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namespace android {
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SensorService::SensorDirectConnection::SensorDirectConnection(const sp<SensorService>& service,
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uid_t uid, const sensors_direct_mem_t *mem, int32_t halChannelHandle,
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const String16& opPackageName)
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: mService(service), mUid(uid), mMem(*mem),
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mHalChannelHandle(halChannelHandle),
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mOpPackageName(opPackageName), mDestroyed(false) {
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ALOGD_IF(DEBUG_CONNECTIONS, "Created SensorDirectConnection");
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}
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SensorService::SensorDirectConnection::~SensorDirectConnection() {
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ALOGD_IF(DEBUG_CONNECTIONS, "~SensorDirectConnection %p", this);
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destroy();
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}
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void SensorService::SensorDirectConnection::destroy() {
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Mutex::Autolock _l(mDestroyLock);
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// destroy once only
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if (mDestroyed) {
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return;
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}
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stopAll();
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mService->cleanupConnection(this);
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if (mMem.handle != nullptr) {
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native_handle_close(mMem.handle);
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native_handle_delete(const_cast<struct native_handle*>(mMem.handle));
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}
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mDestroyed = true;
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}
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void SensorService::SensorDirectConnection::onFirstRef() {
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}
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void SensorService::SensorDirectConnection::dump(String8& result) const {
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Mutex::Autolock _l(mConnectionLock);
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result.appendFormat("\tPackage %s, HAL channel handle %d, total sensor activated %zu\n",
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String8(mOpPackageName).string(), getHalChannelHandle(), mActivated.size());
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for (auto &i : mActivated) {
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result.appendFormat("\t\tSensor %#08x, rate %d\n", i.first, i.second);
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}
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}
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sp<BitTube> SensorService::SensorDirectConnection::getSensorChannel() const {
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return nullptr;
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}
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status_t SensorService::SensorDirectConnection::enableDisable(
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int handle, bool enabled, nsecs_t samplingPeriodNs, nsecs_t maxBatchReportLatencyNs,
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int reservedFlags) {
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// SensorDirectConnection does not support enableDisable, parameters not used
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UNUSED(handle);
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UNUSED(enabled);
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UNUSED(samplingPeriodNs);
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UNUSED(maxBatchReportLatencyNs);
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UNUSED(reservedFlags);
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return INVALID_OPERATION;
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}
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status_t SensorService::SensorDirectConnection::setEventRate(
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int handle, nsecs_t samplingPeriodNs) {
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// SensorDirectConnection does not support setEventRate, parameters not used
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UNUSED(handle);
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UNUSED(samplingPeriodNs);
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return INVALID_OPERATION;
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}
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status_t SensorService::SensorDirectConnection::flush() {
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// SensorDirectConnection does not support flush
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return INVALID_OPERATION;
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}
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int32_t SensorService::SensorDirectConnection::configureChannel(int handle, int rateLevel) {
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if (handle == -1 && rateLevel == SENSOR_DIRECT_RATE_STOP) {
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stopAll();
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return NO_ERROR;
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}
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if (!mService->isOperationPermitted(mOpPackageName)) {
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return PERMISSION_DENIED;
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}
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sp<SensorInterface> si = mService->getSensorInterfaceFromHandle(handle);
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if (si == nullptr) {
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return NAME_NOT_FOUND;
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}
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const Sensor& s = si->getSensor();
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if (!SensorService::canAccessSensor(s, "config direct channel", mOpPackageName)) {
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return PERMISSION_DENIED;
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}
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if (s.getHighestDirectReportRateLevel() == 0
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|| rateLevel > s.getHighestDirectReportRateLevel()
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|| !s.isDirectChannelTypeSupported(mMem.type)) {
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return INVALID_OPERATION;
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}
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struct sensors_direct_cfg_t config = {
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.rate_level = rateLevel
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};
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Mutex::Autolock _l(mConnectionLock);
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SensorDevice& dev(SensorDevice::getInstance());
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int ret = dev.configureDirectChannel(handle, getHalChannelHandle(), &config);
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if (rateLevel == SENSOR_DIRECT_RATE_STOP) {
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if (ret == NO_ERROR) {
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mActivated.erase(handle);
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} else if (ret > 0) {
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ret = UNKNOWN_ERROR;
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}
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} else {
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if (ret > 0) {
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mActivated[handle] = rateLevel;
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}
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}
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return ret;
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}
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void SensorService::SensorDirectConnection::stopAll(bool backupRecord) {
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struct sensors_direct_cfg_t config = {
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.rate_level = SENSOR_DIRECT_RATE_STOP
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};
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Mutex::Autolock _l(mConnectionLock);
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SensorDevice& dev(SensorDevice::getInstance());
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for (auto &i : mActivated) {
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dev.configureDirectChannel(i.first, getHalChannelHandle(), &config);
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}
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if (backupRecord && mActivatedBackup.empty()) {
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mActivatedBackup = mActivated;
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}
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mActivated.clear();
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}
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void SensorService::SensorDirectConnection::recoverAll() {
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stopAll(false);
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Mutex::Autolock _l(mConnectionLock);
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SensorDevice& dev(SensorDevice::getInstance());
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// recover list of report from backup
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mActivated = mActivatedBackup;
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mActivatedBackup.clear();
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// re-enable them
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for (auto &i : mActivated) {
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struct sensors_direct_cfg_t config = {
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.rate_level = i.second
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};
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dev.configureDirectChannel(i.first, getHalChannelHandle(), &config);
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}
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}
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int32_t SensorService::SensorDirectConnection::getHalChannelHandle() const {
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return mHalChannelHandle;
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}
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bool SensorService::SensorDirectConnection::isEquivalent(const sensors_direct_mem_t *mem) const {
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bool ret = false;
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if (mMem.type == mem->type) {
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switch (mMem.type) {
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case SENSOR_DIRECT_MEM_TYPE_ASHMEM: {
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// there is no known method to test if two ashmem fds are equivalent besides
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// trivially comparing the fd values (ino number from fstat() are always the
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// same, pointing to "/dev/ashmem").
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int fd1 = mMem.handle->data[0];
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int fd2 = mem->handle->data[0];
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ret = (fd1 == fd2);
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break;
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}
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case SENSOR_DIRECT_MEM_TYPE_GRALLOC:
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// there is no known method to test if two gralloc handle are equivalent
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ret = false;
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break;
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default:
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// should never happen
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ALOGE("Unexpected mem type %d", mMem.type);
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ret = true;
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break;
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}
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}
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return ret;
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}
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} // namespace android
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