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android13/hardware/google/pixel/thermal/utils/thermal_watcher.cpp

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/*
* 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 ATRACE_TAG (ATRACE_TAG_THERMAL | ATRACE_TAG_HAL)
#include "thermal_watcher.h"
#include <android-base/file.h>
#include <android-base/logging.h>
#include <android-base/stringprintf.h>
#include <android-base/strings.h>
#include <cutils/uevent.h>
#include <dirent.h>
#include <linux/netlink.h>
#include <linux/thermal.h>
#include <sys/inotify.h>
#include <sys/resource.h>
#include <sys/types.h>
#include <utils/Trace.h>
#include <chrono>
#include <fstream>
#include "thermal-helper.h"
namespace android {
namespace hardware {
namespace thermal {
namespace V2_0 {
namespace implementation {
namespace {
static int nlErrorHandle(struct sockaddr_nl *nla, struct nlmsgerr *err, void *arg) {
int *ret = reinterpret_cast<int *>(arg);
*ret = err->error;
LOG(ERROR) << __func__ << "nl_groups: " << nla->nl_groups << ", nl_pid: " << nla->nl_pid;
return NL_STOP;
}
static int nlFinishHandle(struct nl_msg *msg, void *arg) {
int *ret = reinterpret_cast<int *>(arg);
*ret = 1;
struct nlmsghdr *nlh = nlmsg_hdr(msg);
LOG(VERBOSE) << __func__ << ": nlmsg type: " << nlh->nlmsg_type;
return NL_OK;
}
static int nlAckHandle(struct nl_msg *msg, void *arg) {
int *ret = reinterpret_cast<int *>(arg);
*ret = 1;
struct nlmsghdr *nlh = nlmsg_hdr(msg);
LOG(VERBOSE) << __func__ << ": nlmsg type: " << nlh->nlmsg_type;
return NL_OK;
}
static int nlSeqCheckHandle(struct nl_msg *msg, void *arg) {
int *ret = reinterpret_cast<int *>(arg);
*ret = 1;
struct nlmsghdr *nlh = nlmsg_hdr(msg);
LOG(VERBOSE) << __func__ << ": nlmsg type: " << nlh->nlmsg_type;
return NL_OK;
}
struct HandlerArgs {
const char *group;
int id;
};
static int nlSendMsg(struct nl_sock *sock, struct nl_msg *msg,
int (*rx_handler)(struct nl_msg *, void *), void *data) {
int err, done = 0;
std::unique_ptr<nl_cb, decltype(&nl_cb_put)> cb(nl_cb_alloc(NL_CB_DEFAULT), nl_cb_put);
err = nl_send_auto_complete(sock, msg);
if (err < 0)
return err;
err = 0;
nl_cb_err(cb.get(), NL_CB_CUSTOM, nlErrorHandle, &err);
nl_cb_set(cb.get(), NL_CB_FINISH, NL_CB_CUSTOM, nlFinishHandle, &done);
nl_cb_set(cb.get(), NL_CB_ACK, NL_CB_CUSTOM, nlAckHandle, &done);
if (rx_handler != NULL)
nl_cb_set(cb.get(), NL_CB_VALID, NL_CB_CUSTOM, rx_handler, data);
while (err == 0 && done == 0) nl_recvmsgs(sock, cb.get());
return err;
}
static int nlFamilyHandle(struct nl_msg *msg, void *arg) {
struct HandlerArgs *grp = reinterpret_cast<struct HandlerArgs *>(arg);
struct nlattr *tb[CTRL_ATTR_MAX + 1];
struct genlmsghdr *gnlh = (struct genlmsghdr *)nlmsg_data(nlmsg_hdr(msg));
struct nlattr *mcgrp;
int rem_mcgrp;
nla_parse(tb, CTRL_ATTR_MAX, genlmsg_attrdata(gnlh, 0), genlmsg_attrlen(gnlh, 0), NULL);
if (!tb[CTRL_ATTR_MCAST_GROUPS]) {
LOG(ERROR) << __func__ << "Multicast group not found";
return -1;
}
nla_for_each_nested(mcgrp, tb[CTRL_ATTR_MCAST_GROUPS], rem_mcgrp) {
struct nlattr *tb_mcgrp[CTRL_ATTR_MCAST_GRP_MAX + 1];
nla_parse(tb_mcgrp, CTRL_ATTR_MCAST_GRP_MAX, reinterpret_cast<nlattr *>(nla_data(mcgrp)),
nla_len(mcgrp), NULL);
if (!tb_mcgrp[CTRL_ATTR_MCAST_GRP_NAME] || !tb_mcgrp[CTRL_ATTR_MCAST_GRP_ID])
continue;
if (strncmp(reinterpret_cast<char *>(nla_data(tb_mcgrp[CTRL_ATTR_MCAST_GRP_NAME])),
grp->group, nla_len(tb_mcgrp[CTRL_ATTR_MCAST_GRP_NAME])) != 0)
continue;
grp->id = nla_get_u32(tb_mcgrp[CTRL_ATTR_MCAST_GRP_ID]);
break;
}
return 0;
}
static int nlGetMulticastId(struct nl_sock *sock, const char *family, const char *group) {
int err = 0, ctrlid;
struct HandlerArgs grp = {
.group = group,
.id = -ENOENT,
};
std::unique_ptr<nl_msg, decltype(&nlmsg_free)> msg(nlmsg_alloc(), nlmsg_free);
ctrlid = genl_ctrl_resolve(sock, "nlctrl");
genlmsg_put(msg.get(), 0, 0, ctrlid, 0, 0, CTRL_CMD_GETFAMILY, 0);
nla_put_string(msg.get(), CTRL_ATTR_FAMILY_NAME, family);
err = nlSendMsg(sock, msg.get(), nlFamilyHandle, &grp);
if (err)
return err;
err = grp.id;
LOG(INFO) << group << " multicast_id: " << grp.id;
return err;
}
static bool socketAddMembership(struct nl_sock *sock, const char *group) {
int mcid = nlGetMulticastId(sock, THERMAL_GENL_FAMILY_NAME, group);
if (mcid < 0) {
LOG(ERROR) << "Failed to get multicast id: " << group;
return false;
}
if (nl_socket_add_membership(sock, mcid)) {
LOG(ERROR) << "Failed to add netlink socket membership: " << group;
return false;
}
LOG(INFO) << "Added netlink socket membership: " << group;
return true;
}
static int handleEvent(struct nl_msg *n, void *arg) {
struct nlmsghdr *nlh = nlmsg_hdr(n);
struct genlmsghdr *glh = genlmsg_hdr(nlh);
struct nlattr *attrs[THERMAL_GENL_ATTR_MAX + 1];
int *tz_id = reinterpret_cast<int *>(arg);
genlmsg_parse(nlh, 0, attrs, THERMAL_GENL_ATTR_MAX, NULL);
if (glh->cmd == THERMAL_GENL_EVENT_TZ_TRIP_UP) {
LOG(INFO) << "THERMAL_GENL_EVENT_TZ_TRIP_UP";
if (attrs[THERMAL_GENL_ATTR_TZ_ID]) {
LOG(INFO) << "Thermal zone id: " << nla_get_u32(attrs[THERMAL_GENL_ATTR_TZ_ID]);
*tz_id = nla_get_u32(attrs[THERMAL_GENL_ATTR_TZ_ID]);
}
if (attrs[THERMAL_GENL_ATTR_TZ_TRIP_ID])
LOG(INFO) << "Thermal zone trip id: "
<< nla_get_u32(attrs[THERMAL_GENL_ATTR_TZ_TRIP_ID]);
}
if (glh->cmd == THERMAL_GENL_EVENT_TZ_TRIP_DOWN) {
LOG(INFO) << "THERMAL_GENL_EVENT_TZ_TRIP_DOWN";
if (attrs[THERMAL_GENL_ATTR_TZ_ID]) {
LOG(INFO) << "Thermal zone id: " << nla_get_u32(attrs[THERMAL_GENL_ATTR_TZ_ID]);
*tz_id = nla_get_u32(attrs[THERMAL_GENL_ATTR_TZ_ID]);
}
if (attrs[THERMAL_GENL_ATTR_TZ_TRIP_ID])
LOG(INFO) << "Thermal zone trip id: "
<< nla_get_u32(attrs[THERMAL_GENL_ATTR_TZ_TRIP_ID]);
}
if (glh->cmd == THERMAL_GENL_EVENT_TZ_GOV_CHANGE) {
LOG(INFO) << "THERMAL_GENL_EVENT_TZ_GOV_CHANGE";
if (attrs[THERMAL_GENL_ATTR_TZ_ID]) {
LOG(INFO) << "Thermal zone id: " << nla_get_u32(attrs[THERMAL_GENL_ATTR_TZ_ID]);
*tz_id = nla_get_u32(attrs[THERMAL_GENL_ATTR_TZ_ID]);
}
if (attrs[THERMAL_GENL_ATTR_GOV_NAME])
LOG(INFO) << "Governor name: " << nla_get_string(attrs[THERMAL_GENL_ATTR_GOV_NAME]);
}
if (glh->cmd == THERMAL_GENL_EVENT_TZ_CREATE) {
LOG(INFO) << "THERMAL_GENL_EVENT_TZ_CREATE";
if (attrs[THERMAL_GENL_ATTR_TZ_ID]) {
LOG(INFO) << "Thermal zone id: " << nla_get_u32(attrs[THERMAL_GENL_ATTR_TZ_ID]);
*tz_id = nla_get_u32(attrs[THERMAL_GENL_ATTR_TZ_ID]);
}
if (attrs[THERMAL_GENL_ATTR_TZ_NAME])
LOG(INFO) << "Thermal zone name: " << nla_get_string(attrs[THERMAL_GENL_ATTR_TZ_NAME]);
}
if (glh->cmd == THERMAL_GENL_EVENT_TZ_DELETE) {
LOG(INFO) << "THERMAL_GENL_EVENT_TZ_DELETE";
if (attrs[THERMAL_GENL_ATTR_TZ_ID]) {
LOG(INFO) << "Thermal zone id: " << nla_get_u32(attrs[THERMAL_GENL_ATTR_TZ_ID]);
*tz_id = nla_get_u32(attrs[THERMAL_GENL_ATTR_TZ_ID]);
}
}
if (glh->cmd == THERMAL_GENL_EVENT_TZ_DISABLE) {
LOG(INFO) << "THERMAL_GENL_EVENT_TZ_DISABLE";
if (attrs[THERMAL_GENL_ATTR_TZ_ID]) {
LOG(INFO) << "Thermal zone id: " << nla_get_u32(attrs[THERMAL_GENL_ATTR_TZ_ID]);
*tz_id = nla_get_u32(attrs[THERMAL_GENL_ATTR_TZ_ID]);
}
}
if (glh->cmd == THERMAL_GENL_EVENT_TZ_ENABLE) {
LOG(INFO) << "THERMAL_GENL_EVENT_TZ_ENABLE";
if (attrs[THERMAL_GENL_ATTR_TZ_ID]) {
LOG(INFO) << "Thermal zone id: " << nla_get_u32(attrs[THERMAL_GENL_ATTR_TZ_ID]);
*tz_id = nla_get_u32(attrs[THERMAL_GENL_ATTR_TZ_ID]);
}
}
if (glh->cmd == THERMAL_GENL_EVENT_TZ_TRIP_CHANGE) {
LOG(INFO) << "THERMAL_GENL_EVENT_TZ_TRIP_CHANGE";
if (attrs[THERMAL_GENL_ATTR_TZ_ID]) {
LOG(INFO) << "Thermal zone id: " << nla_get_u32(attrs[THERMAL_GENL_ATTR_TZ_ID]);
*tz_id = nla_get_u32(attrs[THERMAL_GENL_ATTR_TZ_ID]);
}
if (attrs[THERMAL_GENL_ATTR_TZ_TRIP_ID])
LOG(INFO) << "Trip id:: " << nla_get_u32(attrs[THERMAL_GENL_ATTR_TZ_TRIP_ID]);
if (attrs[THERMAL_GENL_ATTR_TZ_TRIP_TYPE])
LOG(INFO) << "Trip type: " << nla_get_u32(attrs[THERMAL_GENL_ATTR_TZ_TRIP_TYPE]);
if (attrs[THERMAL_GENL_ATTR_TZ_TRIP_TEMP])
LOG(INFO) << "Trip temp: " << nla_get_u32(attrs[THERMAL_GENL_ATTR_TZ_TRIP_TEMP]);
if (attrs[THERMAL_GENL_ATTR_TZ_TRIP_HYST])
LOG(INFO) << "Trip hyst: " << nla_get_u32(attrs[THERMAL_GENL_ATTR_TZ_TRIP_HYST]);
}
if (glh->cmd == THERMAL_GENL_EVENT_TZ_TRIP_ADD) {
LOG(INFO) << "THERMAL_GENL_EVENT_TZ_TRIP_ADD";
if (attrs[THERMAL_GENL_ATTR_TZ_ID])
LOG(INFO) << "Thermal zone id: " << nla_get_u32(attrs[THERMAL_GENL_ATTR_TZ_ID]);
if (attrs[THERMAL_GENL_ATTR_TZ_TRIP_ID])
LOG(INFO) << "Trip id:: " << nla_get_u32(attrs[THERMAL_GENL_ATTR_TZ_TRIP_ID]);
if (attrs[THERMAL_GENL_ATTR_TZ_TRIP_TYPE])
LOG(INFO) << "Trip type: " << nla_get_u32(attrs[THERMAL_GENL_ATTR_TZ_TRIP_TYPE]);
if (attrs[THERMAL_GENL_ATTR_TZ_TRIP_TEMP])
LOG(INFO) << "Trip temp: " << nla_get_u32(attrs[THERMAL_GENL_ATTR_TZ_TRIP_TEMP]);
if (attrs[THERMAL_GENL_ATTR_TZ_TRIP_HYST])
LOG(INFO) << "Trip hyst: " << nla_get_u32(attrs[THERMAL_GENL_ATTR_TZ_TRIP_HYST]);
}
if (glh->cmd == THERMAL_GENL_EVENT_TZ_TRIP_DELETE) {
LOG(INFO) << "THERMAL_GENL_EVENT_TZ_TRIP_DELETE";
if (attrs[THERMAL_GENL_ATTR_TZ_ID]) {
LOG(INFO) << "Thermal zone id: " << nla_get_u32(attrs[THERMAL_GENL_ATTR_TZ_ID]);
*tz_id = nla_get_u32(attrs[THERMAL_GENL_ATTR_TZ_ID]);
}
if (attrs[THERMAL_GENL_ATTR_TZ_TRIP_ID])
LOG(INFO) << "Trip id:: " << nla_get_u32(attrs[THERMAL_GENL_ATTR_TZ_TRIP_ID]);
}
if (glh->cmd == THERMAL_GENL_EVENT_CDEV_STATE_UPDATE) {
LOG(INFO) << "THERMAL_GENL_EVENT_CDEV_STATE_UPDATE";
if (attrs[THERMAL_GENL_ATTR_CDEV_ID])
LOG(INFO) << "Cooling device id: " << nla_get_u32(attrs[THERMAL_GENL_ATTR_CDEV_ID]);
if (attrs[THERMAL_GENL_ATTR_CDEV_CUR_STATE])
LOG(INFO) << "Cooling device current state: "
<< nla_get_u32(attrs[THERMAL_GENL_ATTR_CDEV_CUR_STATE]);
}
if (glh->cmd == THERMAL_GENL_EVENT_CDEV_ADD) {
LOG(INFO) << "THERMAL_GENL_EVENT_CDEV_ADD";
if (attrs[THERMAL_GENL_ATTR_CDEV_NAME])
LOG(INFO) << "Cooling device name: " << nla_get_u32(attrs[THERMAL_GENL_ATTR_CDEV_NAME]);
if (attrs[THERMAL_GENL_ATTR_CDEV_ID])
LOG(INFO) << "Cooling device id: " << nla_get_u32(attrs[THERMAL_GENL_ATTR_CDEV_ID]);
if (attrs[THERMAL_GENL_ATTR_CDEV_MAX_STATE])
LOG(INFO) << "Cooling device max state: "
<< nla_get_u32(attrs[THERMAL_GENL_ATTR_CDEV_MAX_STATE]);
}
if (glh->cmd == THERMAL_GENL_EVENT_CDEV_DELETE) {
LOG(INFO) << "THERMAL_GENL_EVENT_CDEV_DELETE";
if (attrs[THERMAL_GENL_ATTR_CDEV_ID])
LOG(INFO) << "Cooling device id: " << nla_get_u32(attrs[THERMAL_GENL_ATTR_CDEV_ID]);
}
if (glh->cmd == THERMAL_GENL_SAMPLING_TEMP) {
LOG(INFO) << "THERMAL_GENL_SAMPLING_TEMP";
if (attrs[THERMAL_GENL_ATTR_TZ_ID]) {
LOG(INFO) << "Thermal zone id: " << nla_get_u32(attrs[THERMAL_GENL_ATTR_TZ_ID]);
*tz_id = nla_get_u32(attrs[THERMAL_GENL_ATTR_TZ_ID]);
}
if (attrs[THERMAL_GENL_ATTR_TZ_TEMP])
LOG(INFO) << "Thermal zone temp: " << nla_get_u32(attrs[THERMAL_GENL_ATTR_TZ_TEMP]);
}
return 0;
}
} // namespace
void ThermalWatcher::registerFilesToWatch(const std::set<std::string> &sensors_to_watch) {
LOG(INFO) << "Uevent register file to watch...";
monitored_sensors_.insert(sensors_to_watch.begin(), sensors_to_watch.end());
uevent_fd_.reset((TEMP_FAILURE_RETRY(uevent_open_socket(64 * 1024, true))));
if (uevent_fd_.get() < 0) {
LOG(ERROR) << "failed to open uevent socket";
return;
}
fcntl(uevent_fd_, F_SETFL, O_NONBLOCK);
looper_->addFd(uevent_fd_.get(), 0, Looper::EVENT_INPUT, nullptr, nullptr);
sleep_ms_ = std::chrono::milliseconds(0);
last_update_time_ = boot_clock::now();
}
void ThermalWatcher::registerFilesToWatchNl(const std::set<std::string> &sensors_to_watch) {
LOG(INFO) << "Thermal genl register file to watch...";
monitored_sensors_.insert(sensors_to_watch.begin(), sensors_to_watch.end());
sk_thermal = nl_socket_alloc();
if (!sk_thermal) {
LOG(ERROR) << "nl_socket_alloc failed";
return;
}
if (genl_connect(sk_thermal)) {
LOG(ERROR) << "genl_connect failed: sk_thermal";
return;
}
thermal_genl_fd_.reset(nl_socket_get_fd(sk_thermal));
if (thermal_genl_fd_.get() < 0) {
LOG(ERROR) << "Failed to create thermal netlink socket";
return;
}
if (!socketAddMembership(sk_thermal, THERMAL_GENL_EVENT_GROUP_NAME)) {
return;
}
/*
* Currently, only the update_temperature() will send thermal genl samlping events
* from kernel. To avoid thermal-hal busy because samlping events are sent
* too frequently, ignore thermal genl samlping events until we figure out how to use it.
*
if (!socketAddMembership(sk_thermal, THERMAL_GENL_SAMPLING_GROUP_NAME)) {
return;
}
*/
fcntl(thermal_genl_fd_, F_SETFL, O_NONBLOCK);
looper_->addFd(thermal_genl_fd_.get(), 0, Looper::EVENT_INPUT, nullptr, nullptr);
sleep_ms_ = std::chrono::milliseconds(0);
last_update_time_ = boot_clock::now();
}
bool ThermalWatcher::startWatchingDeviceFiles() {
if (cb_) {
auto ret = this->run("FileWatcherThread", PRIORITY_HIGHEST);
if (ret != NO_ERROR) {
LOG(ERROR) << "ThermalWatcherThread start fail";
return false;
} else {
LOG(INFO) << "ThermalWatcherThread started";
return true;
}
}
return false;
}
void ThermalWatcher::parseUevent(std::set<std::string> *sensors_set) {
bool thermal_event = false;
constexpr int kUeventMsgLen = 2048;
char msg[kUeventMsgLen + 2];
char *cp;
while (true) {
int n = uevent_kernel_multicast_recv(uevent_fd_.get(), msg, kUeventMsgLen);
if (n <= 0) {
if (errno != EAGAIN && errno != EWOULDBLOCK) {
LOG(ERROR) << "Error reading from Uevent Fd";
}
break;
}
if (n >= kUeventMsgLen) {
LOG(ERROR) << "Uevent overflowed buffer, discarding";
continue;
}
msg[n] = '\0';
msg[n + 1] = '\0';
cp = msg;
while (*cp) {
std::string uevent = cp;
auto findSubSystemThermal = uevent.find("SUBSYSTEM=thermal");
if (!thermal_event) {
if (!uevent.find("SUBSYSTEM=")) {
if (findSubSystemThermal != std::string::npos) {
thermal_event = true;
} else {
break;
}
}
} else {
auto start_pos = uevent.find("NAME=");
if (start_pos != std::string::npos) {
start_pos += 5;
std::string name = uevent.substr(start_pos);
if (std::find(monitored_sensors_.begin(), monitored_sensors_.end(), name) !=
monitored_sensors_.end()) {
sensors_set->insert(name);
}
break;
}
}
while (*cp++) {
}
}
}
}
// TODO(b/175367921): Consider for potentially adding more type of event in the function
// instead of just add the sensors to the list.
void ThermalWatcher::parseGenlink(std::set<std::string> *sensors_set) {
int err = 0, done = 0, tz_id = -1;
std::unique_ptr<nl_cb, decltype(&nl_cb_put)> cb(nl_cb_alloc(NL_CB_DEFAULT), nl_cb_put);
nl_cb_err(cb.get(), NL_CB_CUSTOM, nlErrorHandle, &err);
nl_cb_set(cb.get(), NL_CB_FINISH, NL_CB_CUSTOM, nlFinishHandle, &done);
nl_cb_set(cb.get(), NL_CB_ACK, NL_CB_CUSTOM, nlAckHandle, &done);
nl_cb_set(cb.get(), NL_CB_SEQ_CHECK, NL_CB_CUSTOM, nlSeqCheckHandle, &done);
nl_cb_set(cb.get(), NL_CB_VALID, NL_CB_CUSTOM, handleEvent, &tz_id);
while (!done && !err) {
nl_recvmsgs(sk_thermal, cb.get());
if (tz_id < 0) {
break;
}
std::string name;
if (getThermalZoneTypeById(tz_id, &name) &&
std::find(monitored_sensors_.begin(), monitored_sensors_.end(), name) !=
monitored_sensors_.end()) {
sensors_set->insert(name);
}
}
}
void ThermalWatcher::wake() {
looper_->wake();
}
bool ThermalWatcher::threadLoop() {
LOG(VERBOSE) << "ThermalWatcher polling...";
int fd;
std::set<std::string> sensors;
auto time_elapsed_ms = std::chrono::duration_cast<std::chrono::milliseconds>(boot_clock::now() -
last_update_time_);
if (time_elapsed_ms < sleep_ms_ &&
looper_->pollOnce(sleep_ms_.count(), &fd, nullptr, nullptr) >= 0) {
ATRACE_NAME("ThermalWatcher::threadLoop - receive event");
if (fd != uevent_fd_.get() && fd != thermal_genl_fd_.get()) {
return true;
} else if (fd == thermal_genl_fd_.get()) {
parseGenlink(&sensors);
} else if (fd == uevent_fd_.get()) {
parseUevent(&sensors);
}
// Ignore cb_ if uevent is not from monitored sensors
if (sensors.size() == 0) {
return true;
}
}
sleep_ms_ = cb_(sensors);
last_update_time_ = boot_clock::now();
return true;
}
} // namespace implementation
} // namespace V2_0
} // namespace thermal
} // namespace hardware
} // namespace android
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