nvidia-gpu: introduce notion of a device
Perform device discovery tasks only once per device to prepare for
introducing additional gpu sensors.
In the current implementation, sensor updates and device discovery via
MCTP are managed within a single class for simplicity. However, since a
GPU device typically includes multiple sensors, performing device
discovery for each individual sensor is inefficient. Instead, it would
be more effective to execute device discovery once per device.
Tested: Build an image for gb200nvl-obmc machine with the following
patches cherry picked. This patches are needed to enable the mctp stack.
https://gerrit.openbmc.org/c/openbmc/openbmc/+/79422
```
$ curl -k -u 'root:0penBmc' https://10.137.203.137/redfish/v1/Chassis/NVIDIA_GB200_1/Sensors/temperature_NVIDIA_GB200_GPU_0_TEMP_0
{
"@odata.id": "/redfish/v1/Chassis/NVIDIA_GB200_1/Sensors/temperature_NVIDIA_GB200_GPU_0_TEMP_0",
"@odata.type": "#Sensor.v1_2_0.Sensor",
"Id": "temperature_NVIDIA_GB200_GPU_0_TEMP_0",
"Name": "NVIDIA GB200 GPU 0 TEMP 0",
"Reading": 37.6875,
"ReadingRangeMax": 127.0,
"ReadingRangeMin": -128.0,
"ReadingType": "Temperature",
"ReadingUnits": "Cel",
"Status": {
"Health": "OK",
"State": "Enabled"
}
}%
```
Change-Id: Ie3dcd43caa031b4aaa61d8be3f5d71aefd53bc9a
Signed-off-by: Harshit Aghera <haghera@nvidia.com>
diff --git a/src/nvidia-gpu/NvidiaGpuDevice.hpp b/src/nvidia-gpu/NvidiaGpuDevice.hpp
new file mode 100644
index 0000000..3653928
--- /dev/null
+++ b/src/nvidia-gpu/NvidiaGpuDevice.hpp
@@ -0,0 +1,62 @@
+/*
+ * SPDX-FileCopyrightText: Copyright (c) 2024-2025 NVIDIA CORPORATION &
+ * AFFILIATES. All rights reserved.
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#pragma once
+
+#include "MctpRequester.hpp"
+#include "NvidiaDeviceDiscovery.hpp"
+#include "NvidiaGpuSensor.hpp"
+
+#include <boost/asio/io_context.hpp>
+#include <boost/asio/steady_timer.hpp>
+#include <sdbusplus/asio/connection.hpp>
+#include <sdbusplus/asio/object_server.hpp>
+
+#include <chrono>
+#include <cstdint>
+#include <memory>
+#include <string>
+
+class GpuDevice
+{
+ public:
+ GpuDevice(const SensorConfigs& configs, const std::string& name,
+ const std::string& path,
+ const std::shared_ptr<sdbusplus::asio::connection>& conn,
+ uint8_t eid, boost::asio::io_context& io,
+ mctp::MctpRequester& mctpRequester,
+ sdbusplus::asio::object_server& objectServer);
+
+ const std::string& getPath() const
+ {
+ return path;
+ }
+
+ private:
+ void makeSensors();
+
+ void read();
+
+ uint8_t eid{};
+
+ std::chrono::milliseconds sensorPollMs;
+
+ boost::asio::steady_timer waitTimer;
+
+ mctp::MctpRequester& mctpRequester;
+
+ std::shared_ptr<sdbusplus::asio::connection> conn;
+
+ sdbusplus::asio::object_server& objectServer;
+
+ std::shared_ptr<NvidiaGpuTempSensor> tempSensor;
+
+ SensorConfigs configs;
+
+ std::string name;
+
+ std::string path;
+};