thermal-hal: Add support for new thermal HAl v2 binary

Add support for new thermal HAL v2 binary, which can listen to the thermal
framework netlink messages instead of the uevents sent by the userspace
governor. This new binary should be selected only for the kernel version
supporting the new netlink messages in thermal framework.

Change-Id: I31cdb93fb73d59ff3eb94eb76d6e42b3448c3ee9

1 files changed, 295 insertions, 0 deletions

diff --git a/thermalMonitorNetlink.cpp b/thermalMonitorNetlink.cpp
new file mode 100644
index 0000000..b8e7128
--- /dev/null
+++ b/thermalMonitorNetlink.cpp
@@ -0,0 +1,295 @@
+/*
+ * Copyright (c) 2021, The Linux Foundation. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *	* Redistributions of source code must retain the above copyright
+ *	  notice, this list of conditions and the following disclaimer.
+ *	* Redistributions in binary form must reproduce the above
+ *	  copyright notice, this list of conditions and the following
+ *	  disclaimer in the documentation and/or other materials provided
+ *	  with the distribution.
+ *	* Neither the name of The Linux Foundation nor the names of its
+ *	  contributors may be used to endorse or promote products derived
+ *	  from this software without specific prior written permission.
+ *
+ *
+ * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+ * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <unistd.h>
+#include <linux/thermal.h>
+#include <android-base/logging.h>
+#include <android-base/properties.h>
+#include <android-base/stringprintf.h>
+
+#include "thermalMonitorNetlink.h"
+
+namespace android {
+namespace hardware {
+namespace thermal {
+namespace V2_0 {
+namespace implementation {
+
+using pollCB = std::function<bool()>;
+using familyCB = std::function<int(struct nl_msg *, void *)>;
+
+void thermal_listen(struct nl_sock *soc, const pollCB &stopCB)
+{
+	while (!stopCB())
+		nl_recvmsgs_default(soc);
+
+	LOG(INFO) << "thermal_listen_event Exit" << std::endl;
+	return;
+}
+
+int thermal_event_cb(struct nl_msg *n, void *data)
+{
+	ThermalMonitor *t = (ThermalMonitor *)data;
+	return t->event_parse(n, NULL);
+}
+
+int thermal_sample_cb(struct nl_msg *n, void *data)
+{
+	ThermalMonitor *t = (ThermalMonitor *)data;
+	return t->sample_parse(n, NULL);
+}
+
+int thermal_family_cb(struct nl_msg *n, void *data)
+{
+	ThermalMonitor *t = (ThermalMonitor *)data;
+	return t->family_msg_cb(n, NULL);
+}
+
+ThermalMonitor::ThermalMonitor(const eventMonitorCB &inp_event_cb,
+				const eventMonitorCB &inp_sample_cb):
+	event_group(-1),
+	sample_group(-1),
+	event_cb(inp_event_cb),
+	sample_cb(inp_sample_cb)
+{
+	monitor_shutdown = false;
+}
+
+ThermalMonitor::~ThermalMonitor()
+{
+	monitor_shutdown = true;
+	event_th.join();
+	sample_th.join();
+	if (sample_soc)
+		nl_socket_free(sample_soc);
+	if (event_soc)
+		nl_socket_free(event_soc);
+}
+
+int ThermalMonitor::event_parse(struct nl_msg *n, void *data)
+{
+	struct nlmsghdr *nl_hdr = nlmsg_hdr(n);
+	struct genlmsghdr *hdr = genlmsg_hdr(nl_hdr);
+	struct nlattr *attrs[THERMAL_GENL_ATTR_MAX + 1];
+	int tzn = -1, trip = -1;
+
+	genlmsg_parse(nl_hdr, 0, attrs, THERMAL_GENL_ATTR_MAX, NULL);
+
+	switch (hdr->cmd) {
+	case THERMAL_GENL_EVENT_TZ_TRIP_UP:
+	case THERMAL_GENL_EVENT_TZ_TRIP_DOWN:
+		if (attrs[THERMAL_GENL_ATTR_TZ_ID])
+			tzn = nla_get_u32(attrs[THERMAL_GENL_ATTR_TZ_ID]);
+
+		if (attrs[THERMAL_GENL_ATTR_TZ_TRIP_ID])
+			trip = nla_get_u32(
+					attrs[THERMAL_GENL_ATTR_TZ_TRIP_ID]);
+		LOG(INFO) << "thermal_nl_event: TZ:" << tzn << " Trip:"
+		       << trip << "event:" << hdr->cmd << std::endl;
+		event_cb(tzn, trip);
+		break;
+	}
+
+	return 0;
+
+}
+
+int ThermalMonitor::sample_parse(struct nl_msg *n, void *data)
+{
+	struct nlmsghdr *nl_hdr = nlmsg_hdr(n);
+	struct genlmsghdr *hdr = genlmsg_hdr(nl_hdr);
+	struct nlattr *attrs[THERMAL_GENL_ATTR_MAX + 1];
+	int tzn = -1, temp = -1;
+
+	genlmsg_parse(nl_hdr, 0, attrs, THERMAL_GENL_ATTR_MAX, NULL);
+
+	switch (hdr->cmd) {
+	case THERMAL_GENL_SAMPLING_TEMP:
+		if (attrs[THERMAL_GENL_ATTR_TZ_ID])
+			tzn = nla_get_u32(attrs[THERMAL_GENL_ATTR_TZ_ID]);
+
+		if (attrs[THERMAL_GENL_ATTR_TZ_TEMP])
+			temp = nla_get_u32(attrs[THERMAL_GENL_ATTR_TZ_TEMP]);
+
+		LOG(INFO) << "thermal_sample_event: TZ:" << tzn << " temp:"
+			<< temp << std::endl;
+		sample_cb(tzn, temp);
+		break;
+	}
+
+	return 0;
+
+}
+
+int ThermalMonitor::family_msg_cb(struct nl_msg *msg, void *data)
+{
+	struct nlattr *tb[CTRL_ATTR_MAX + 1];
+	struct genlmsghdr *gnlh = genlmsg_hdr(nlmsg_hdr(msg));
+	struct nlattr *mc_group;
+	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) << "Multicast group not available\n";
+		return -1;
+	}
+
+	nla_for_each_nested(mc_group, tb[CTRL_ATTR_MCAST_GROUPS], rem_mcgrp) {
+
+		struct nlattr *nl_group[CTRL_ATTR_MCAST_GRP_MAX + 1];
+
+		nla_parse(nl_group, CTRL_ATTR_MCAST_GRP_MAX,
+			  (struct nlattr *)nla_data(mc_group),
+			  nla_len(mc_group), NULL);
+
+		if (!nl_group[CTRL_ATTR_MCAST_GRP_NAME] ||
+		    !nl_group[CTRL_ATTR_MCAST_GRP_ID])
+			continue;
+		std::string family((char *)nla_data(
+					nl_group[CTRL_ATTR_MCAST_GRP_NAME]));
+		LOG(DEBUG) << "Family:" << family << std::endl;
+		if (family == THERMAL_GENL_EVENT_GROUP_NAME)
+			event_group = nla_get_u32(
+					nl_group[CTRL_ATTR_MCAST_GRP_ID]);
+
+		if (family == THERMAL_GENL_SAMPLING_GROUP_NAME)
+			sample_group = nla_get_u32(
+					nl_group[CTRL_ATTR_MCAST_GRP_ID]);
+	}
+
+	return 0;
+}
+
+int ThermalMonitor::send_nl_msg(struct nl_msg *msg)
+{
+	int ret = 0;
+
+	ret = nl_send_auto(event_soc, msg);
+	if (ret < 0) {
+		LOG(ERROR) << "Error sending NL message\n";
+		return ret;
+	}
+	nl_socket_disable_seq_check(event_soc);
+	nl_socket_modify_cb(event_soc, NL_CB_VALID, NL_CB_CUSTOM,
+			thermal_family_cb, this);
+	ret = nl_recvmsgs_default(event_soc);
+
+	return ret;
+}
+
+int ThermalMonitor::fetch_group_id(void)
+{
+	struct nl_msg *msg;
+	int ctrlid, ret = 0;
+
+	msg = nlmsg_alloc();
+	if (!msg)
+		return -1;
+
+	ctrlid = genl_ctrl_resolve(event_soc, "nlctrl");
+	genlmsg_put(msg, 0, 0, ctrlid, 0, 0, CTRL_CMD_GETFAMILY, 0);
+
+	nla_put_string(msg, CTRL_ATTR_FAMILY_NAME, THERMAL_GENL_FAMILY_NAME);
+	send_nl_msg(msg);
+
+	nlmsg_free(msg);
+
+	if (event_group != -1 && sample_group != -1) {
+		LOG(DEBUG) << "Event: " << event_group <<
+			" Sample:" << sample_group << std::endl;
+		ret = nl_socket_add_membership(event_soc, event_group);
+		if (ret) {
+			LOG(ERROR) << "Event Socket membership add error\n";
+			return ret;
+		}
+
+		ret = nl_socket_add_membership(sample_soc, sample_group);
+		if (ret) {
+			LOG(ERROR) << "sample Socket membership add error\n";
+			return ret;
+		}
+	}
+	return 0;
+}
+
+void ThermalMonitor::start()
+{
+	struct nl_msg *msg;
+
+	event_soc = nl_socket_alloc();
+	if (!event_soc) {
+		LOG(ERROR) << "Event socket alloc failed\n";
+		return;
+	}
+
+	if (genl_connect(event_soc)) {
+		LOG(ERROR) << "Event socket connect failed\n";
+		nl_socket_free(event_soc);
+		event_soc = nullptr;
+		return;
+	}
+	sample_soc = nl_socket_alloc();
+	if (!sample_soc) {
+		LOG(ERROR) << "Sample socket alloc failed\n";
+		nl_socket_free(event_soc);
+		event_soc = nullptr;
+		return;
+	}
+
+	if (genl_connect(sample_soc)) {
+		LOG(ERROR) << "Sample socket connect failed\n";
+		nl_socket_free(sample_soc);
+		nl_socket_free(event_soc);
+		event_soc = nullptr;
+		sample_soc = nullptr;
+		return;
+	}
+	if (fetch_group_id())
+		return;
+	nl_socket_disable_seq_check(sample_soc);
+	nl_socket_modify_cb(sample_soc, NL_CB_VALID, NL_CB_CUSTOM,
+			thermal_sample_cb, this);
+	nl_socket_disable_seq_check(event_soc);
+	nl_socket_modify_cb(event_soc, NL_CB_VALID, NL_CB_CUSTOM,
+			thermal_event_cb, this);
+	event_th = std::thread(thermal_listen, event_soc,
+		std::bind(&ThermalMonitor::stopPolling, this));
+
+	sample_th = std::thread(thermal_listen, sample_soc,
+		std::bind(&ThermalMonitor::stopPolling, this));
+}
+
+}  // namespace implementation
+}  // namespace V2_0
+}  // namespace thermal
+}  // namespace hardware
+}  // namespace android