Add D3D GPU Sensors (#426)

Thanks to @kolos.

LibreHardwareMonitorLib/Hardware/D3DDisplayDevice.cs

@@ -0,0 +1,238 @@
+// This Source Code Form is subject to the terms of the Mozilla Public License, v. 2.0.
+// If a copy of the MPL was not distributed with this file, You can obtain one at http://mozilla.org/MPL/2.0/.
+// Copyright (C) LibreHardwareMonitor and Contributors.
+// All Rights Reserved.
+// Ported from: https://github.com/processhacker/processhacker/blob/master/plugins/ExtendedTools/gpumon.c
+
+using System;
+using System.Linq;
+using System.Runtime.InteropServices;
+using LibreHardwareMonitor.Interop;
+
+namespace LibreHardwareMonitor.Hardware
+{
+    internal static class D3DDisplayDevice
+    {
+        public static string[] GetDeviceIdentifiers()
+        {
+            if (CfgMgr32.CM_Get_Device_Interface_List_Size(out uint size, ref CfgMgr32.GUID_DISPLAY_DEVICE_ARRIVAL, null, CfgMgr32.CM_GET_DEVICE_INTERFACE_LIST_PRESENT) != CfgMgr32.CR_SUCCESS)
+                return null;
+
+
+            char[] data = new char[size];
+            if (CfgMgr32.CM_Get_Device_Interface_List(ref CfgMgr32.GUID_DISPLAY_DEVICE_ARRIVAL, null, data, (uint)data.Length, CfgMgr32.CM_GET_DEVICE_INTERFACE_LIST_PRESENT) == CfgMgr32.CR_SUCCESS)
+                return new string(data).Split('\0').Where(m => !string.IsNullOrEmpty(m)).ToArray();
+
+
+            return null;
+        }
+
+        public static bool GetDeviceInfoByIdentifier(string deviceIdentifier, out D3DDeviceInfo deviceInfo)
+        {
+            deviceInfo = new D3DDeviceInfo();
+
+            OpenAdapterFromDeviceName(out uint status, deviceIdentifier, out D3dkmth.D3DKMT_OPENADAPTERFROMDEVICENAME adapter);
+            if (status != WinNt.STATUS_SUCCESS)
+                return false;
+
+
+            GetAdapterType(out status, adapter, out D3dkmth.D3DKMT_ADAPTERTYPE adapterType);
+            if (status != WinNt.STATUS_SUCCESS)
+                return false;
+
+            if (!adapterType.Value.HasFlag(D3dkmth.D3DKMT_ADAPTERTYPE_FLAGS.SoftwareDevice))
+                return false;
+
+
+            GetQueryStatisticsAdapterInformation(out status, adapter, out D3dkmth.D3DKMT_QUERYSTATISTICS_ADAPTER_INFORMATION adapterInformation);
+            if (status != WinNt.STATUS_SUCCESS)
+                return false;
+
+
+            uint segmentCount = adapterInformation.NbSegments;
+            uint nodeCount = adapterInformation.NodeCount;
+
+            deviceInfo.Nodes = new D3DDeviceNodeInfo[nodeCount];
+
+            for (uint nodeId = 0; nodeId < nodeCount; nodeId++)
+            {
+                GetNodeMetaData(out status, adapter, nodeId, out D3dkmth.D3DKMT_NODEMETADATA nodeMetaData);
+                if (status != WinNt.STATUS_SUCCESS)
+                    return false;
+
+
+                GetQueryStatisticsNode(out status, adapter, nodeId, out D3dkmth.D3DKMT_QUERYSTATISTICS_NODE_INFORMATION nodeInformation);
+                if (status != WinNt.STATUS_SUCCESS)
+                    return false;
+
+
+                deviceInfo.Nodes[nodeId] = new D3DDeviceNodeInfo
+                {
+                    Id = nodeId, Name = GetNodeEngineTypeString(nodeMetaData), RunningTime = nodeInformation.GlobalInformation.RunningTime.QuadPart, QueryTime = DateTime.Now
+                };
+            }
+
+            for (uint segmentId = 0; segmentId < segmentCount; segmentId++)
+            {
+                GetQueryStatisticsSegment(out status, adapter, segmentId, out D3dkmth.D3DKMT_QUERYSTATISTICS_SEGMENT_INFORMATION segmentInformation);
+                if (status != WinNt.STATUS_SUCCESS)
+                    return false;
+
+
+                ulong commitLimit = segmentInformation.CommitLimit;
+                ulong bytesResident = segmentInformation.BytesResident;
+                ulong bytesCommitted = segmentInformation.BytesCommitted;
+
+                uint aperture = segmentInformation.Aperture;
+
+                if (aperture == 1)
+                {
+                    deviceInfo.GpuSharedLimit += commitLimit;
+                    deviceInfo.GpuSharedUsed += bytesResident;
+                    deviceInfo.GpuSharedMax += bytesCommitted;
+                }
+                else
+                {
+                    deviceInfo.GpuDedicatedLimit += commitLimit;
+                    deviceInfo.GpuDedicatedUsed += bytesResident;
+                    deviceInfo.GpuDedicatedMax += bytesCommitted;
+                }
+            }
+
+            CloseAdapter(out status, adapter);
+            return status == WinNt.STATUS_SUCCESS;
+        }
+
+        private static string GetNodeEngineTypeString(D3dkmth.D3DKMT_NODEMETADATA nodeMetaData)
+        {
+            return nodeMetaData.NodeData.EngineType switch
+            {
+                D3dkmdt.DXGK_ENGINE_TYPE.DXGK_ENGINE_TYPE_OTHER => "D3D " + nodeMetaData.NodeData.FriendlyName,
+                D3dkmdt.DXGK_ENGINE_TYPE.DXGK_ENGINE_TYPE_3D => "D3D 3D",
+                D3dkmdt.DXGK_ENGINE_TYPE.DXGK_ENGINE_TYPE_VIDEO_DECODE => "D3D Video Decode",
+                D3dkmdt.DXGK_ENGINE_TYPE.DXGK_ENGINE_TYPE_VIDEO_ENCODE => "D3D Video Encode",
+                D3dkmdt.DXGK_ENGINE_TYPE.DXGK_ENGINE_TYPE_VIDEO_PROCESSING => "D3D Video Processing",
+                D3dkmdt.DXGK_ENGINE_TYPE.DXGK_ENGINE_TYPE_SCENE_ASSEMBLY => "D3D Scene Assembly",
+                D3dkmdt.DXGK_ENGINE_TYPE.DXGK_ENGINE_TYPE_COPY => "D3D Copy",
+                D3dkmdt.DXGK_ENGINE_TYPE.DXGK_ENGINE_TYPE_OVERLAY => "D3D Overlay",
+                D3dkmdt.DXGK_ENGINE_TYPE.DXGK_ENGINE_TYPE_CRYPTO => "D3D Crypto",
+                _ => "D3D Unknown",
+            };
+        }
+
+        private static void GetNodeMetaData(out uint status, D3dkmth.D3DKMT_OPENADAPTERFROMDEVICENAME adapter, uint nodeId, out D3dkmth.D3DKMT_NODEMETADATA nodeMetaDataResult)
+        {
+            IntPtr nodeMetaDataPtr = Marshal.AllocHGlobal(Marshal.SizeOf(typeof(D3dkmth.D3DKMT_NODEMETADATA)));
+            nodeMetaDataResult = new D3dkmth.D3DKMT_NODEMETADATA { NodeOrdinalAndAdapterIndex = nodeId };
+            Marshal.StructureToPtr(nodeMetaDataResult, nodeMetaDataPtr, true);
+
+            var queryAdapterInfo = new D3dkmth.D3DKMT_QUERYADAPTERINFO
+            {
+                hAdapter = adapter.hAdapter,
+                Type = D3dkmth.KMTQUERYADAPTERINFOTYPE.KMTQAITYPE_NODEMETADATA,
+                pPrivateDriverData = nodeMetaDataPtr,
+                PrivateDriverDataSize = Marshal.SizeOf(typeof(D3dkmth.D3DKMT_NODEMETADATA))
+            };
+
+            status = Gdi32.D3DKMTQueryAdapterInfo(ref queryAdapterInfo);
+            nodeMetaDataResult = Marshal.PtrToStructure<D3dkmth.D3DKMT_NODEMETADATA>(nodeMetaDataPtr);
+            Marshal.FreeHGlobal(nodeMetaDataPtr);
+        }
+
+        private static void GetQueryStatisticsNode(out uint status, D3dkmth.D3DKMT_OPENADAPTERFROMDEVICENAME adapter, uint nodeId, out D3dkmth.D3DKMT_QUERYSTATISTICS_NODE_INFORMATION nodeInformation)
+        {
+            var queryElement = new D3dkmth.D3DKMT_QUERYSTATISTICS_QUERY_ELEMENT { QueryNode = { NodeId = nodeId } };
+
+            var queryStatistics = new D3dkmth.D3DKMT_QUERYSTATISTICS
+            {
+                AdapterLuid = adapter.AdapterLuid, Type = D3dkmth.D3DKMT_QUERYSTATISTICS_TYPE.D3DKMT_QUERYSTATISTICS_NODE, QueryElement = queryElement
+            };
+
+            status = Gdi32.D3DKMTQueryStatistics(ref queryStatistics);
+
+            nodeInformation = queryStatistics.QueryResult.NodeInformation;
+        }
+
+        private static void GetQueryStatisticsSegment
+        (
+            out uint status,
+            D3dkmth.D3DKMT_OPENADAPTERFROMDEVICENAME adapter,
+            uint segmentId,
+            out D3dkmth.D3DKMT_QUERYSTATISTICS_SEGMENT_INFORMATION segmentInformation)
+        {
+            var queryElement = new D3dkmth.D3DKMT_QUERYSTATISTICS_QUERY_ELEMENT { QuerySegment = { SegmentId = segmentId } };
+
+            var queryStatistics = new D3dkmth.D3DKMT_QUERYSTATISTICS
+            {
+                AdapterLuid = adapter.AdapterLuid, Type = D3dkmth.D3DKMT_QUERYSTATISTICS_TYPE.D3DKMT_QUERYSTATISTICS_SEGMENT, QueryElement = queryElement
+            };
+
+            status = Gdi32.D3DKMTQueryStatistics(ref queryStatistics);
+
+            segmentInformation = queryStatistics.QueryResult.SegmentInformation;
+        }
+
+        private static void GetQueryStatisticsAdapterInformation
+        (
+            out uint status,
+            D3dkmth.D3DKMT_OPENADAPTERFROMDEVICENAME adapter,
+            out D3dkmth.D3DKMT_QUERYSTATISTICS_ADAPTER_INFORMATION adapterInformation)
+        {
+            var queryStatistics = new D3dkmth.D3DKMT_QUERYSTATISTICS { AdapterLuid = adapter.AdapterLuid, Type = D3dkmth.D3DKMT_QUERYSTATISTICS_TYPE.D3DKMT_QUERYSTATISTICS_ADAPTER, };
+
+            status = Gdi32.D3DKMTQueryStatistics(ref queryStatistics);
+
+            adapterInformation = queryStatistics.QueryResult.AdapterInformation;
+        }
+
+        private static void GetAdapterType(out uint status, D3dkmth.D3DKMT_OPENADAPTERFROMDEVICENAME adapter, out D3dkmth.D3DKMT_ADAPTERTYPE adapterTypeResult)
+        {
+            IntPtr adapterTypePtr = Marshal.AllocHGlobal(Marshal.SizeOf(typeof(D3dkmth.D3DKMT_ADAPTERTYPE)));
+            var queryAdapterInfo = new D3dkmth.D3DKMT_QUERYADAPTERINFO
+            {
+                hAdapter = adapter.hAdapter,
+                Type = D3dkmth.KMTQUERYADAPTERINFOTYPE.KMTQAITYPE_ADAPTERTYPE,
+                pPrivateDriverData = adapterTypePtr,
+                PrivateDriverDataSize = Marshal.SizeOf(typeof(D3dkmth.D3DKMT_ADAPTERTYPE))
+            };
+
+            status = Gdi32.D3DKMTQueryAdapterInfo(ref queryAdapterInfo);
+            adapterTypeResult = Marshal.PtrToStructure<D3dkmth.D3DKMT_ADAPTERTYPE>(adapterTypePtr);
+            Marshal.FreeHGlobal(adapterTypePtr);
+        }
+
+        private static void OpenAdapterFromDeviceName(out uint status, string displayDeviceName, out D3dkmth.D3DKMT_OPENADAPTERFROMDEVICENAME adapter)
+        {
+            adapter = new D3dkmth.D3DKMT_OPENADAPTERFROMDEVICENAME { pDeviceName = displayDeviceName };
+            status = Gdi32.D3DKMTOpenAdapterFromDeviceName(ref adapter);
+        }
+
+        private static void CloseAdapter(out uint status, D3dkmth.D3DKMT_OPENADAPTERFROMDEVICENAME adapter)
+        {
+            var closeAdapter = new D3dkmth.D3DKMT_CLOSEADAPTER { hAdapter = adapter.hAdapter };
+            status = Gdi32.D3DKMTCloseAdapter(ref closeAdapter);
+        }
+
+        public struct D3DDeviceNodeInfo
+        {
+            public ulong Id;
+            public string Name;
+            public long RunningTime;
+            public DateTime QueryTime;
+        }
+
+        public struct D3DDeviceInfo
+        {
+            public ulong GpuSharedLimit;
+            public ulong GpuDedicatedLimit;
+
+            public ulong GpuSharedUsed;
+            public ulong GpuDedicatedUsed;
+
+            public ulong GpuSharedMax;
+            public ulong GpuDedicatedMax;
+
+            public D3DDeviceNodeInfo[] Nodes;
+        }
+    }
+}

LibreHardwareMonitorLib/Hardware/Gpu/AmdGpu.cs

@@ -16,19 +16,26 @@ namespace LibreHardwareMonitor.Hardware.Gpu
         private readonly int _adapterIndex;
 
         private readonly IntPtr _context = IntPtr.Zero;
-        private readonly bool _framemetricsStarted = false;
-
         private readonly Sensor _controlSensor;
         private readonly Sensor _coreClock;
         private readonly Sensor _coreLoad;
         private readonly Sensor _coreVoltage;
-        private readonly bool _overdriveApiSupported;
         private readonly int _currentOverdriveApiLevel;
         private readonly Sensor _fan;
         private readonly Control _fanControl;
+        private readonly bool _frameMetricsStarted;
+        private readonly Sensor _fullscreenFps;
+        private readonly Sensor _gpuDedicatedMemoryUsage;
+        private readonly Sensor[] _gpuNodeUsage;
+        private readonly DateTime[] _gpuNodeUsagePrevTick;
+        private readonly long[] _gpuNodeUsagePrevValue;
+        private readonly Sensor _gpuSharedMemoryUsage;
         private readonly Sensor _memoryClock;
         private readonly Sensor _memoryLoad;
+        private readonly int _memorySensorIndex;
         private readonly Sensor _memoryVoltage;
+        private readonly int _nodeSensorIndex;
+        private readonly bool _overdriveApiSupported;
         private readonly Sensor _powerCore;
         private readonly Sensor _powerPpt;
         private readonly Sensor _powerSoC;
@@ -43,14 +50,14 @@ namespace LibreHardwareMonitor.Hardware.Gpu
         private readonly Sensor _temperaturePlx;
         private readonly Sensor _temperatureSoC;
         private readonly Sensor _temperatureVddc;
-        private readonly Sensor _fullscreenFPS;
+        private readonly string _windowsDeviceName;
 
-        public AmdGpu(string name, int adapterIndex, int busNumber, int deviceNumber, ISettings settings)
-            : base(name, new Identifier("gpu-amd", adapterIndex.ToString(CultureInfo.InvariantCulture)), settings)
+        public AmdGpu(AtiAdlxx.ADLAdapterInfo adapterInfo, ISettings settings)
+            : base(adapterInfo.AdapterName.Trim(), new Identifier("gpu-amd", adapterInfo.AdapterIndex.ToString(CultureInfo.InvariantCulture)), settings)
         {
-            _adapterIndex = adapterIndex;
-            BusNumber = busNumber;
-            DeviceNumber = deviceNumber;
+            _adapterIndex = adapterInfo.AdapterIndex;
+            BusNumber = adapterInfo.BusNumber;
+            DeviceNumber = adapterInfo.DeviceNumber;
 
             _temperatureCore = new Sensor("GPU Core", 0, SensorType.Temperature, this, settings);
             _temperatureMemory = new Sensor("GPU Memory", 1, SensorType.Temperature, this, settings);
@@ -81,7 +88,40 @@ namespace LibreHardwareMonitor.Hardware.Gpu
             _powerSoC = new Sensor("GPU SoC", 2, SensorType.Power, this, settings);
             _powerTotal = new Sensor("GPU Package", 3, SensorType.Power, this, settings);
 
-            _fullscreenFPS = new Sensor("Fullscreen FPS", 0, SensorType.Factor, this, settings);
+            _fullscreenFps = new Sensor("Fullscreen FPS", 0, SensorType.Factor, this, settings);
+
+            if (!Software.OperatingSystem.IsUnix)
+            {
+                string convertedPnpString = adapterInfo.PNPString.Replace("\\", "#");
+                string[] deviceIdentifiers = D3DDisplayDevice.GetDeviceIdentifiers();
+                if (deviceIdentifiers != null)
+                {
+                    foreach (string deviceIdentifier in deviceIdentifiers)
+                    {
+                        if (deviceIdentifier.IndexOf(convertedPnpString, StringComparison.OrdinalIgnoreCase) != -1 &&
+                            D3DDisplayDevice.GetDeviceInfoByIdentifier(deviceIdentifier, out D3DDisplayDevice.D3DDeviceInfo deviceInfo))
+                        {
+                            _windowsDeviceName = deviceIdentifier;
+
+                            _gpuDedicatedMemoryUsage = new Sensor("D3D Dedicated Memory Used", _memorySensorIndex++, SensorType.SmallData, this, settings);
+                            _gpuSharedMemoryUsage = new Sensor("D3D Shared Memory Used", _memorySensorIndex++, SensorType.SmallData, this, settings);
+
+                            _gpuNodeUsage = new Sensor[deviceInfo.Nodes.Length];
+                            _gpuNodeUsagePrevValue = new long[deviceInfo.Nodes.Length];
+                            _gpuNodeUsagePrevTick = new DateTime[deviceInfo.Nodes.Length];
+
+                            foreach (D3DDisplayDevice.D3DDeviceNodeInfo node in deviceInfo.Nodes)
+                            {
+                                _gpuNodeUsage[node.Id] = new Sensor(node.Name, _nodeSensorIndex++, SensorType.Load, this, settings);
+                                _gpuNodeUsagePrevValue[node.Id] = node.RunningTime;
+                                _gpuNodeUsagePrevTick[node.Id] = node.QueryTime;
+                            }
+
+                            break;
+                        }
+                    }
+                }
+            }
 
             int supported = 0;
             int enabled = 0;
@@ -91,9 +131,9 @@ namespace LibreHardwareMonitor.Hardware.Gpu
             {
                 if (supported == AtiAdlxx.ADL_TRUE && AtiAdlxx.ADL2_Adapter_FrameMetrics_Start(_context, _adapterIndex, 0) == AtiAdlxx.ADLStatus.ADL_OK)
                 {
-                    _framemetricsStarted = true;
-                    _fullscreenFPS.Value = -1;
-                    ActivateSensor(_fullscreenFPS);
+                    _frameMetricsStarted = true;
+                    _fullscreenFps.Value = -1;
+                    ActivateSensor(_fullscreenFps);
                 }
             }
 
@@ -107,12 +147,12 @@ namespace LibreHardwareMonitor.Hardware.Gpu
 
             if (_currentOverdriveApiLevel >= 6)
             {
-                if (AtiAdlxx.ADL2_Main_Control_Create(AtiAdlxx.Main_Memory_Alloc, adapterIndex, ref _context) == AtiAdlxx.ADLStatus.ADL_OK)
+                if (AtiAdlxx.ADL2_Main_Control_Create(AtiAdlxx.Main_Memory_Alloc, _adapterIndex, ref _context) == AtiAdlxx.ADLStatus.ADL_OK)
                     _context = IntPtr.Zero;
             }
 
-            AtiAdlxx.ADLFanSpeedInfo fanSpeedInfo = new AtiAdlxx.ADLFanSpeedInfo();
-            if (AtiAdlxx.ADL_Overdrive5_FanSpeedInfo_Get(adapterIndex, 0, ref fanSpeedInfo) != AtiAdlxx.ADLStatus.ADL_OK)
+            AtiAdlxx.ADLFanSpeedInfo fanSpeedInfo = new();
+            if (AtiAdlxx.ADL_Overdrive5_FanSpeedInfo_Get(_adapterIndex, 0, ref fanSpeedInfo) != AtiAdlxx.ADLStatus.ADL_OK)
             {
                 fanSpeedInfo.MaxPercent = 100;
                 fanSpeedInfo.MinPercent = 0;
@@ -139,11 +179,9 @@ namespace LibreHardwareMonitor.Hardware.Gpu
         {
             if (control.ControlMode == ControlMode.Software)
             {
-                AtiAdlxx.ADLFanSpeedValue fanSpeedValue = new AtiAdlxx.ADLFanSpeedValue
+                AtiAdlxx.ADLFanSpeedValue fanSpeedValue = new()
                 {
-                    SpeedType = AtiAdlxx.ADL_DL_FANCTRL_SPEED_TYPE_PERCENT,
-                    Flags = AtiAdlxx.ADL_DL_FANCTRL_FLAG_USER_DEFINED_SPEED,
-                    FanSpeed = (int)control.SoftwareValue
+                    SpeedType = AtiAdlxx.ADL_DL_FANCTRL_SPEED_TYPE_PERCENT, Flags = AtiAdlxx.ADL_DL_FANCTRL_FLAG_USER_DEFINED_SPEED, FanSpeed = (int)control.SoftwareValue
                 };
 
                 AtiAdlxx.ADL_Overdrive5_FanSpeed_Set(_adapterIndex, 0, ref fanSpeedValue);
@@ -177,16 +215,35 @@ namespace LibreHardwareMonitor.Hardware.Gpu
 
         public override void Update()
         {
-            if(_framemetricsStarted)
+            if (_windowsDeviceName != null && D3DDisplayDevice.GetDeviceInfoByIdentifier(_windowsDeviceName, out D3DDisplayDevice.D3DDeviceInfo deviceInfo))
+            {
+                _gpuDedicatedMemoryUsage.Value = 1f * deviceInfo.GpuDedicatedUsed / 1024 / 1024;
+                _gpuSharedMemoryUsage.Value = 1f * deviceInfo.GpuSharedUsed / 1024 / 1024;
+                ActivateSensor(_gpuDedicatedMemoryUsage);
+                ActivateSensor(_gpuSharedMemoryUsage);
+
+                foreach (D3DDisplayDevice.D3DDeviceNodeInfo node in deviceInfo.Nodes)
+                {
+                    long runningTimeDiff = node.RunningTime - _gpuNodeUsagePrevValue[node.Id];
+                    long timeDiff = node.QueryTime.Ticks - _gpuNodeUsagePrevTick[node.Id].Ticks;
+
+                    _gpuNodeUsage[node.Id].Value = 100f * runningTimeDiff / timeDiff;
+                    _gpuNodeUsagePrevValue[node.Id] = node.RunningTime;
+                    _gpuNodeUsagePrevTick[node.Id] = node.QueryTime;
+                    ActivateSensor(_gpuNodeUsage[node.Id]);
+                }
+            }
+
+            if (_frameMetricsStarted)
             {
                 float framesPerSecond = 0;
                 if (AtiAdlxx.ADL2_Adapter_FrameMetrics_Get(_context, _adapterIndex, 0, ref framesPerSecond) == AtiAdlxx.ADLStatus.ADL_OK)
                 {
-                    _fullscreenFPS.Value = framesPerSecond;
+                    _fullscreenFps.Value = framesPerSecond;
                 }
             }
 
-            if (_currentOverdriveApiLevel < 8)
+            if (_overdriveApiSupported)
             {
                 if (_currentOverdriveApiLevel >= 6)
                 {
@@ -217,7 +274,7 @@ namespace LibreHardwareMonitor.Hardware.Gpu
             }
             else
             {
-                AtiAdlxx.ADLPMLogDataOutput logDataOutput = new AtiAdlxx.ADLPMLogDataOutput();
+                AtiAdlxx.ADLPMLogDataOutput logDataOutput = new();
                 if (AtiAdlxx.ADL2_New_QueryPMLogData_Get(_context, _adapterIndex, ref logDataOutput) == AtiAdlxx.ADLStatus.ADL_OK)
                 {
                     GetPMLog(logDataOutput, AtiAdlxx.ADLSensorType.PMLOG_TEMPERATURE_EDGE, _temperatureCore);
@@ -266,7 +323,7 @@ namespace LibreHardwareMonitor.Hardware.Gpu
 
         private void GetOD5CurrentActivity()
         {
-            AtiAdlxx.ADLPMActivity adlpmActivity = new AtiAdlxx.ADLPMActivity();
+            AtiAdlxx.ADLPMActivity adlpmActivity = new();
             if (AtiAdlxx.ADL_Overdrive5_CurrentActivity_Get(_adapterIndex, ref adlpmActivity) == AtiAdlxx.ADLStatus.ADL_OK)
             {
                 if (adlpmActivity.EngineClock > 0)
@@ -313,7 +370,7 @@ namespace LibreHardwareMonitor.Hardware.Gpu
 
         private void GetOD5FanSpeed(int speedType, Sensor sensor)
         {
-            AtiAdlxx.ADLFanSpeedValue fanSpeedValue = new AtiAdlxx.ADLFanSpeedValue { SpeedType = speedType };
+            AtiAdlxx.ADLFanSpeedValue fanSpeedValue = new() { SpeedType = speedType };
             if (AtiAdlxx.ADL_Overdrive5_FanSpeed_Get(_adapterIndex, 0, ref fanSpeedValue) == AtiAdlxx.ADLStatus.ADL_OK)
             {
                 sensor.Value = fanSpeedValue.FanSpeed;
@@ -325,17 +382,17 @@ namespace LibreHardwareMonitor.Hardware.Gpu
             }
         }
 
-        private void GetOD5Temperature(Sensor _temperatureCore)
+        private void GetOD5Temperature(Sensor temperatureCore)
         {
-            AtiAdlxx.ADLTemperature temperature = new AtiAdlxx.ADLTemperature();
+            AtiAdlxx.ADLTemperature temperature = new();
             if (AtiAdlxx.ADL_Overdrive5_Temperature_Get(_adapterIndex, 0, ref temperature) == AtiAdlxx.ADLStatus.ADL_OK)
             {
-                _temperatureCore.Value = 0.001f * temperature.Temperature;
-                ActivateSensor(_temperatureCore);
+                temperatureCore.Value = 0.001f * temperature.Temperature;
+                ActivateSensor(temperatureCore);
             }
             else
             {
-                _temperatureCore.Value = null;
+                temperatureCore.Value = null;
             }
         }
 
@@ -344,6 +401,8 @@ namespace LibreHardwareMonitor.Hardware.Gpu
         /// </summary>
         /// <param name="type">The type.</param>
         /// <param name="sensor">The sensor.</param>
+        /// <param name="minTemperature">The minimum temperature.</param>
+        /// <param name="scale">The scale.</param>
         private void GetODNTemperature(AtiAdlxx.ADLODNTemperatureType type, Sensor sensor, double minTemperature = -200, double scale = 1)
         {
             // If a sensor isn't available, some cards report 54000 degrees C. 110C is expected for Navi, so 100 more than that should be enough to use as a maximum.
@@ -410,7 +469,7 @@ namespace LibreHardwareMonitor.Hardware.Gpu
             if (_fanControl.ControlMode != ControlMode.Undefined)
                 SetDefaultFanSpeed();
 
-            if (_framemetricsStarted)
+            if (_frameMetricsStarted)
                 AtiAdlxx.ADL2_Adapter_FrameMetrics_Stop(_context, _adapterIndex, 0);
 
             if (_context != IntPtr.Zero)

LibreHardwareMonitorLib/Hardware/Gpu/AmdGpuGroup.cs

@@ -80,12 +80,7 @@ namespace LibreHardwareMonitor.Hardware.Gpu
                                         }
 
                                     if (!found)
-                                        _hardware.Add(new AmdGpu(
-                                                                 adapterInfo[i].AdapterName.Trim(),
-                                                                 adapterInfo[i].AdapterIndex,
-                                                                 adapterInfo[i].BusNumber,
-                                                                 adapterInfo[i].DeviceNumber,
-                                                                 settings));
+                                        _hardware.Add(new AmdGpu(adapterInfo[i], settings));
                                 }
 
                                 _report.AppendLine();

LibreHardwareMonitorLib/Hardware/Gpu/NvidiaGpu.cs

@@ -8,6 +8,7 @@ using System;
 using System.Globalization;
 using System.Text;
 using LibreHardwareMonitor.Interop;
+using Microsoft.Win32;
 
 namespace LibreHardwareMonitor.Hardware.Gpu
 {
@@ -19,17 +20,25 @@ namespace LibreHardwareMonitor.Hardware.Gpu
         private readonly NvApi.NvDisplayHandle? _displayHandle;
         private readonly Sensor _fan;
         private readonly Control _fanControl;
+        private readonly Sensor _gpuDedicatedMemoryUsage;
+        private readonly Sensor[] _gpuNodeUsage;
+        private readonly DateTime[] _gpuNodeUsagePrevTick;
+        private readonly long[] _gpuNodeUsagePrevValue;
+        private readonly Sensor _gpuSharedMemoryUsage;
         private readonly NvApi.NvPhysicalGpuHandle _handle;
         private readonly Sensor[] _loads;
         private readonly Sensor _memoryAvail;
         private readonly Sensor _memoryFree;
         private readonly Sensor _memoryLoad;
+        private readonly int _memorySensorIndex;
         private readonly Sensor _memoryUsed;
+        private readonly int _nodeSensorIndex;
         private readonly NvidiaML.NvmlDevice? _nvmlDevice;
         private readonly Sensor _pcieThroughputRx;
         private readonly Sensor _pcieThroughputTx;
         private readonly Sensor _powerUsage;
         private readonly Sensor[] _temperatures;
+        private readonly string _windowsDeviceName;
 
         public NvidiaGpu(int adapterIndex, NvApi.NvPhysicalGpuHandle handle, NvApi.NvDisplayHandle? displayHandle, ISettings settings)
             : base(GetName(handle), new Identifier("gpu-nvidia", adapterIndex.ToString(CultureInfo.InvariantCulture)), settings)
@@ -120,6 +129,101 @@ namespace LibreHardwareMonitor.Hardware.Gpu
 
                     _pcieThroughputRx = new Sensor("GPU PCIe Rx", 0, SensorType.Throughput, this, settings);
                     _pcieThroughputTx = new Sensor("GPU PCIe Tx", 1, SensorType.Throughput, this, settings);
+
+                    if (!Software.OperatingSystem.IsUnix)
+                    {
+                        NvidiaML.NvmlPciInfo? pciInfo = NvidiaML.NvmlDeviceGetPciInfo(_nvmlDevice.Value);
+
+                        if (pciInfo is { } pci)
+                        {
+                            string[] deviceIdentifiers = D3DDisplayDevice.GetDeviceIdentifiers();
+                            if (deviceIdentifiers != null)
+                            {
+                                foreach (string deviceIdentifier in deviceIdentifiers)
+                                {
+                                    if (deviceIdentifier.IndexOf("VEN_" + pci.pciVendorId.ToString("X"), StringComparison.OrdinalIgnoreCase) != -1 &&
+                                        deviceIdentifier.IndexOf("DEV_" + pci.pciDeviceId.ToString("X"), StringComparison.OrdinalIgnoreCase) != -1 &&
+                                        deviceIdentifier.IndexOf("SUBSYS_" + pci.pciSubSystemId.ToString("X"), StringComparison.OrdinalIgnoreCase) != -1)
+                                    {
+                                        bool isMatch = false;
+
+                                        try
+                                        {
+                                            if (Registry.GetValue(@"HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\nvlddmkm\Enum", adapterIndex.ToString(), null) is string adapterPnpId)
+                                            {
+                                                if (deviceIdentifier.IndexOf(adapterPnpId.Replace('\\', '#'), StringComparison.OrdinalIgnoreCase) != -1)
+                                                    isMatch = true;
+                                            }
+                                        }
+                                        catch
+                                        {
+                                            // Ignored.
+                                        }
+
+                                        if (!isMatch)
+                                        {
+                                            try
+                                            {
+                                                string path = deviceIdentifier;
+                                                if (path.StartsWith(@"\\?\"))
+                                                    path = path.Substring(4);
+
+                                                path = path.Replace('#', '\\');
+                                                int index = path.IndexOf('{');
+                                                if (index != -1)
+                                                    path = path.Substring(0, index);
+
+                                                path = @"HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Enum\" + path;
+
+                                                if (Registry.GetValue(path, "LocationInformation", null) is string locationInformation)
+                                                {
+                                                    // For example:
+                                                    // @System32\drivers\pci.sys,#65536;PCI bus %1, device %2, function %3;(38,0,0)
+
+                                                    index = locationInformation.IndexOf('(');
+                                                    if (index != -1)
+                                                    {
+                                                        index++;
+                                                        int secondIndex = locationInformation.IndexOf(',', index);
+                                                        if (secondIndex != -1)
+                                                        {
+                                                            string bus = locationInformation.Substring(index, secondIndex - index);
+
+                                                            if (pci.bus.ToString() == bus)
+                                                                isMatch = true;
+                                                        }
+                                                    }
+                                                }
+                                            }
+                                            catch
+                                            {
+                                                // Ignored.
+                                            }
+                                        }
+
+                                        if (isMatch && D3DDisplayDevice.GetDeviceInfoByIdentifier(deviceIdentifier, out D3DDisplayDevice.D3DDeviceInfo deviceInfo))
+                                        {
+                                            _windowsDeviceName = deviceIdentifier;
+
+                                            _gpuDedicatedMemoryUsage = new Sensor("D3D Dedicated Memory Used", _memorySensorIndex++, SensorType.SmallData, this, settings);
+                                            _gpuSharedMemoryUsage = new Sensor("D3D Shared Memory Used", _memorySensorIndex++, SensorType.SmallData, this, settings);
+
+                                            _gpuNodeUsage = new Sensor[deviceInfo.Nodes.Length];
+                                            _gpuNodeUsagePrevValue = new long[deviceInfo.Nodes.Length];
+                                            _gpuNodeUsagePrevTick = new DateTime[deviceInfo.Nodes.Length];
+
+                                            foreach (D3DDisplayDevice.D3DDeviceNodeInfo node in deviceInfo.Nodes)
+                                            {
+                                                _gpuNodeUsage[node.Id] = new Sensor(node.Name, _nodeSensorIndex++, SensorType.Load, this, settings);
+                                                _gpuNodeUsagePrevValue[node.Id] = node.RunningTime;
+                                                _gpuNodeUsagePrevTick[node.Id] = node.QueryTime;
+                                            }
+                                        }
+                                    }
+                                }
+                            }
+                        }
+                    }
                 }
             }
 
@@ -143,7 +247,7 @@ namespace LibreHardwareMonitor.Hardware.Gpu
 
         private NvApi.NvGPUThermalSettings GetThermalSettings()
         {
-            NvApi.NvGPUThermalSettings settings = new NvApi.NvGPUThermalSettings
+            NvApi.NvGPUThermalSettings settings = new()
             {
                 Version = NvApi.GPU_THERMAL_SETTINGS_VER, Count = NvApi.MAX_THERMAL_SENSORS_PER_GPU, Sensor = new NvApi.NvSensor[NvApi.MAX_THERMAL_SENSORS_PER_GPU]
             };
@@ -170,7 +274,7 @@ namespace LibreHardwareMonitor.Hardware.Gpu
 
         private NvApi.NvGPUCoolerSettings GetCoolerSettings()
         {
-            NvApi.NvGPUCoolerSettings settings = new NvApi.NvGPUCoolerSettings { Version = NvApi.GPU_COOLER_SETTINGS_VER, Cooler = new NvApi.NvCooler[NvApi.MAX_COOLER_PER_GPU] };
+            NvApi.NvGPUCoolerSettings settings = new() { Version = NvApi.GPU_COOLER_SETTINGS_VER, Cooler = new NvApi.NvCooler[NvApi.MAX_COOLER_PER_GPU] };
             if (!(NvApi.NvAPI_GPU_GetCoolerSettings != null && NvApi.NvAPI_GPU_GetCoolerSettings(_handle, 0, ref settings) == NvApi.NvStatus.OK))
             {
                 settings.Count = 0;
@@ -181,7 +285,7 @@ namespace LibreHardwareMonitor.Hardware.Gpu
 
         private uint[] GetClocks()
         {
-            NvApi.NvClocks allClocks = new NvApi.NvClocks { Version = NvApi.GPU_CLOCKS_VER, Clock = new uint[NvApi.MAX_CLOCKS_PER_GPU] };
+            NvApi.NvClocks allClocks = new() { Version = NvApi.GPU_CLOCKS_VER, Clock = new uint[NvApi.MAX_CLOCKS_PER_GPU] };
             if (NvApi.NvAPI_GPU_GetAllClocks != null && NvApi.NvAPI_GPU_GetAllClocks(_handle, ref allClocks) == NvApi.NvStatus.OK)
             {
                 return allClocks.Clock;
@@ -192,6 +296,25 @@ namespace LibreHardwareMonitor.Hardware.Gpu
 
         public override void Update()
         {
+            if (_windowsDeviceName != null && D3DDisplayDevice.GetDeviceInfoByIdentifier(_windowsDeviceName, out D3DDisplayDevice.D3DDeviceInfo deviceInfo))
+            {
+                _gpuDedicatedMemoryUsage.Value = 1f * deviceInfo.GpuDedicatedUsed / 1024 / 1024;
+                _gpuSharedMemoryUsage.Value = 1f * deviceInfo.GpuSharedUsed / 1024 / 1024;
+                ActivateSensor(_gpuDedicatedMemoryUsage);
+                ActivateSensor(_gpuSharedMemoryUsage);
+
+                foreach (D3DDisplayDevice.D3DDeviceNodeInfo node in deviceInfo.Nodes)
+                {
+                    long runningTimeDiff = node.RunningTime - _gpuNodeUsagePrevValue[node.Id];
+                    long timeDiff = node.QueryTime.Ticks - _gpuNodeUsagePrevTick[node.Id].Ticks;
+
+                    _gpuNodeUsage[node.Id].Value = 100f * runningTimeDiff / timeDiff;
+                    _gpuNodeUsagePrevValue[node.Id] = node.RunningTime;
+                    _gpuNodeUsagePrevTick[node.Id] = node.QueryTime;
+                    ActivateSensor(_gpuNodeUsage[node.Id]);
+                }
+            }
+
             NvApi.NvGPUThermalSettings settings = GetThermalSettings();
             // settings.Count is 0 when no valid data available, this happens when you try to read out this value with a high polling interval.
             if (settings.Count > 0)
@@ -228,7 +351,7 @@ namespace LibreHardwareMonitor.Hardware.Gpu
                 }
             }
 
-            NvApi.NvPStates states = new NvApi.NvPStates { Version = NvApi.GPU_PSTATES_VER, PStates = new NvApi.NvPState[NvApi.MAX_PSTATES_PER_GPU] };
+            NvApi.NvPStates states = new() { Version = NvApi.GPU_PSTATES_VER, PStates = new NvApi.NvPState[NvApi.MAX_PSTATES_PER_GPU] };
             if (NvApi.NvAPI_GPU_GetPStates != null && NvApi.NvAPI_GPU_GetPStates(_handle, ref states) == NvApi.NvStatus.OK)
             {
                 for (int i = 0; i < _loads.Length; i++)
@@ -242,7 +365,7 @@ namespace LibreHardwareMonitor.Hardware.Gpu
             }
             else
             {
-                NvApi.NvUsages usages = new NvApi.NvUsages { Version = NvApi.GPU_USAGES_VER, Usage = new uint[NvApi.MAX_USAGES_PER_GPU] };
+                NvApi.NvUsages usages = new() { Version = NvApi.GPU_USAGES_VER, Usage = new uint[NvApi.MAX_USAGES_PER_GPU] };
                 if (NvApi.NvAPI_GPU_GetUsages != null && NvApi.NvAPI_GPU_GetUsages(_handle, ref usages) == NvApi.NvStatus.OK)
                 {
                     _loads[0].Value = usages.Usage[2];
@@ -282,7 +405,7 @@ namespace LibreHardwareMonitor.Hardware.Gpu
                 }
             }
 
-            NvApi.NvMemoryInfo memoryInfo = new NvApi.NvMemoryInfo { Version = NvApi.GPU_MEMORY_INFO_VER, Values = new uint[NvApi.MAX_MEMORY_VALUES_PER_GPU] };
+            NvApi.NvMemoryInfo memoryInfo = new() { Version = NvApi.GPU_MEMORY_INFO_VER, Values = new uint[NvApi.MAX_MEMORY_VALUES_PER_GPU] };
             if (NvApi.NvAPI_GPU_GetMemoryInfo != null && _displayHandle.HasValue && NvApi.NvAPI_GPU_GetMemoryInfo(_displayHandle.Value, ref memoryInfo) == NvApi.NvStatus.OK)
             {
                 uint totalMemory = memoryInfo.Values[0];
@@ -326,7 +449,7 @@ namespace LibreHardwareMonitor.Hardware.Gpu
 
         public override string GetReport()
         {
-            StringBuilder r = new StringBuilder();
+            StringBuilder r = new();
 
             r.AppendLine("Nvidia GPU");
             r.AppendLine();
@@ -335,7 +458,7 @@ namespace LibreHardwareMonitor.Hardware.Gpu
 
             if (_displayHandle.HasValue && NvApi.NvAPI_GetDisplayDriverVersion != null)
             {
-                NvApi.NvDisplayDriverVersion driverVersion = new NvApi.NvDisplayDriverVersion { Version = NvApi.DISPLAY_DRIVER_VERSION_VER };
+                NvApi.NvDisplayDriverVersion driverVersion = new() { Version = NvApi.DISPLAY_DRIVER_VERSION_VER };
                 if (NvApi.NvAPI_GetDisplayDriverVersion(_displayHandle.Value, ref driverVersion) == NvApi.NvStatus.OK)
                 {
                     r.Append("Driver Version: ");
@@ -369,7 +492,7 @@ namespace LibreHardwareMonitor.Hardware.Gpu
 
             if (NvApi.NvAPI_GPU_GetThermalSettings != null)
             {
-                NvApi.NvGPUThermalSettings settings = new NvApi.NvGPUThermalSettings
+                NvApi.NvGPUThermalSettings settings = new()
                 {
                     Version = NvApi.GPU_THERMAL_SETTINGS_VER, Count = NvApi.MAX_THERMAL_SENSORS_PER_GPU, Sensor = new NvApi.NvSensor[NvApi.MAX_THERMAL_SENSORS_PER_GPU]
                 };
@@ -399,7 +522,7 @@ namespace LibreHardwareMonitor.Hardware.Gpu
 
             if (NvApi.NvAPI_GPU_GetAllClocks != null)
             {
-                NvApi.NvClocks allClocks = new NvApi.NvClocks { Version = NvApi.GPU_CLOCKS_VER, Clock = new uint[NvApi.MAX_CLOCKS_PER_GPU] };
+                NvApi.NvClocks allClocks = new() { Version = NvApi.GPU_CLOCKS_VER, Clock = new uint[NvApi.MAX_CLOCKS_PER_GPU] };
                 NvApi.NvStatus status = NvApi.NvAPI_GPU_GetAllClocks(_handle, ref allClocks);
 
                 r.AppendLine("Clocks");
@@ -442,7 +565,7 @@ namespace LibreHardwareMonitor.Hardware.Gpu
 
             if (NvApi.NvAPI_GPU_GetPStates != null)
             {
-                NvApi.NvPStates states = new NvApi.NvPStates { Version = NvApi.GPU_PSTATES_VER, PStates = new NvApi.NvPState[NvApi.MAX_PSTATES_PER_GPU] };
+                NvApi.NvPStates states = new() { Version = NvApi.GPU_PSTATES_VER, PStates = new NvApi.NvPState[NvApi.MAX_PSTATES_PER_GPU] };
                 NvApi.NvStatus status = NvApi.NvAPI_GPU_GetPStates(_handle, ref states);
 
                 r.AppendLine("P-States");
@@ -466,7 +589,7 @@ namespace LibreHardwareMonitor.Hardware.Gpu
 
             if (NvApi.NvAPI_GPU_GetUsages != null)
             {
-                NvApi.NvUsages usages = new NvApi.NvUsages { Version = NvApi.GPU_USAGES_VER, Usage = new uint[NvApi.MAX_USAGES_PER_GPU] };
+                NvApi.NvUsages usages = new() { Version = NvApi.GPU_USAGES_VER, Usage = new uint[NvApi.MAX_USAGES_PER_GPU] };
                 NvApi.NvStatus status = NvApi.NvAPI_GPU_GetUsages(_handle, ref usages);
 
                 r.AppendLine("Usages");
@@ -490,7 +613,7 @@ namespace LibreHardwareMonitor.Hardware.Gpu
 
             if (NvApi.NvAPI_GPU_GetCoolerSettings != null)
             {
-                NvApi.NvGPUCoolerSettings settings = new NvApi.NvGPUCoolerSettings { Version = NvApi.GPU_COOLER_SETTINGS_VER, Cooler = new NvApi.NvCooler[NvApi.MAX_COOLER_PER_GPU] };
+                NvApi.NvGPUCoolerSettings settings = new() { Version = NvApi.GPU_COOLER_SETTINGS_VER, Cooler = new NvApi.NvCooler[NvApi.MAX_COOLER_PER_GPU] };
                 NvApi.NvStatus status = NvApi.NvAPI_GPU_GetCoolerSettings(_handle, 0, ref settings);
                 r.AppendLine("Cooler Settings");
                 r.AppendLine();
@@ -523,11 +646,7 @@ namespace LibreHardwareMonitor.Hardware.Gpu
 
             if (NvApi.NvAPI_GPU_ClientFanCoolersGetStatus != null)
             {
-                var coolers = new NvApi.NvFanCoolersStatus
-                {
-                    Version = NvApi.GPU_FAN_COOLERS_STATUS_VER,
-                    Items = new NvApi.NvFanCoolersStatusItem[NvApi.MAX_FAN_COOLERS_STATUS_ITEMS]
-                };
+                var coolers = new NvApi.NvFanCoolersStatus { Version = NvApi.GPU_FAN_COOLERS_STATUS_VER, Items = new NvApi.NvFanCoolersStatusItem[NvApi.MAX_FAN_COOLERS_STATUS_ITEMS] };
 
                 NvApi.NvStatus status = NvApi.NvAPI_GPU_ClientFanCoolersGetStatus(_handle, ref coolers);
 
@@ -537,16 +656,30 @@ namespace LibreHardwareMonitor.Hardware.Gpu
                 {
                     for (int i = 0; i < coolers.Count; i++)
                     {
-                        r.AppendFormat(" Items[{0}].Type: {1}{2}", i,
-                                       coolers.Items[i].Type, Environment.NewLine);
-                        r.AppendFormat(" Items[{0}].CurrentRpm: {1}{2}", i,
-                                       coolers.Items[i].CurrentRpm, Environment.NewLine);
-                        r.AppendFormat(" Items[{0}].CurrentMinLevel: {1}{2}", i,
-                                       coolers.Items[i].CurrentMinLevel, Environment.NewLine);
-                        r.AppendFormat(" Items[{0}].CurrentMaxLevel: {1}{2}", i,
-                                       coolers.Items[i].CurrentMaxLevel, Environment.NewLine);
-                        r.AppendFormat(" Items[{0}].CurrentLevel: {1}{2}", i,
-                                       coolers.Items[i].CurrentLevel, Environment.NewLine);
+                        r.AppendFormat(" Items[{0}].Type: {1}{2}",
+                                       i,
+                                       coolers.Items[i].Type,
+                                       Environment.NewLine);
+
+                        r.AppendFormat(" Items[{0}].CurrentRpm: {1}{2}",
+                                       i,
+                                       coolers.Items[i].CurrentRpm,
+                                       Environment.NewLine);
+
+                        r.AppendFormat(" Items[{0}].CurrentMinLevel: {1}{2}",
+                                       i,
+                                       coolers.Items[i].CurrentMinLevel,
+                                       Environment.NewLine);
+
+                        r.AppendFormat(" Items[{0}].CurrentMaxLevel: {1}{2}",
+                                       i,
+                                       coolers.Items[i].CurrentMaxLevel,
+                                       Environment.NewLine);
+
+                        r.AppendFormat(" Items[{0}].CurrentLevel: {1}{2}",
+                                       i,
+                                       coolers.Items[i].CurrentLevel,
+                                       Environment.NewLine);
                     }
                 }
                 else
@@ -554,12 +687,13 @@ namespace LibreHardwareMonitor.Hardware.Gpu
                     r.Append(" Status: ");
                     r.AppendLine(status.ToString());
                 }
+
                 r.AppendLine();
             }
 
             if (NvApi.NvAPI_GPU_GetMemoryInfo != null && _displayHandle.HasValue)
             {
-                NvApi.NvMemoryInfo memoryInfo = new NvApi.NvMemoryInfo { Version = NvApi.GPU_MEMORY_INFO_VER, Values = new uint[NvApi.MAX_MEMORY_VALUES_PER_GPU] };
+                NvApi.NvMemoryInfo memoryInfo = new() { Version = NvApi.GPU_MEMORY_INFO_VER, Values = new uint[NvApi.MAX_MEMORY_VALUES_PER_GPU] };
                 NvApi.NvStatus status = NvApi.NvAPI_GPU_GetMemoryInfo(_displayHandle.Value, ref memoryInfo);
 
                 r.AppendLine("Memory Info");
@@ -583,7 +717,7 @@ namespace LibreHardwareMonitor.Hardware.Gpu
 
         private void SoftwareControlValueChanged(IControl control)
         {
-            NvApi.NvGPUCoolerLevels coolerLevels = new NvApi.NvGPUCoolerLevels { Version = NvApi.GPU_COOLER_LEVELS_VER, Levels = new NvApi.NvLevel[NvApi.MAX_COOLER_PER_GPU] };
+            NvApi.NvGPUCoolerLevels coolerLevels = new() { Version = NvApi.GPU_COOLER_LEVELS_VER, Levels = new NvApi.NvLevel[NvApi.MAX_COOLER_PER_GPU] };
             coolerLevels.Levels[0].Level = (int)control.SoftwareValue;
             coolerLevels.Levels[0].Policy = 1;
             NvApi.NvAPI_GPU_SetCoolerLevels(_handle, 0, ref coolerLevels);
@@ -608,7 +742,7 @@ namespace LibreHardwareMonitor.Hardware.Gpu
 
         private void SetDefaultFanSpeed()
         {
-            NvApi.NvGPUCoolerLevels coolerLevels = new NvApi.NvGPUCoolerLevels { Version = NvApi.GPU_COOLER_LEVELS_VER, Levels = new NvApi.NvLevel[NvApi.MAX_COOLER_PER_GPU] };
+            NvApi.NvGPUCoolerLevels coolerLevels = new() { Version = NvApi.GPU_COOLER_LEVELS_VER, Levels = new NvApi.NvLevel[NvApi.MAX_COOLER_PER_GPU] };
             coolerLevels.Levels[0].Policy = 0x20;
             NvApi.NvAPI_GPU_SetCoolerLevels(_handle, 0, ref coolerLevels);
         }

LibreHardwareMonitorLib/Hardware/Gpu/NvidiaGroup.cs

@@ -13,8 +13,8 @@ namespace LibreHardwareMonitor.Hardware.Gpu
 {
     internal class NvidiaGroup : IGroup
     {
-        private readonly List<Hardware> _hardware = new List<Hardware>();
-        private readonly StringBuilder _report = new StringBuilder();
+        private readonly List<Hardware> _hardware = new();
+        private readonly StringBuilder _report = new();
 
         public NvidiaGroup(ISettings settings)
         {
@@ -54,7 +54,7 @@ namespace LibreHardwareMonitor.Hardware.Gpu
                 int i = 0;
                 while (status == NvApi.NvStatus.OK)
                 {
-                    NvApi.NvDisplayHandle displayHandle = new NvApi.NvDisplayHandle();
+                    NvApi.NvDisplayHandle displayHandle = new();
                     status = NvApi.NvAPI_EnumNvidiaDisplayHandle(i, ref displayHandle);
                     i++;
                     

LibreHardwareMonitorLib/Interop/CfgMgr32.cs

@@ -0,0 +1,28 @@
+// This Source Code Form is subject to the terms of the Mozilla Public License, v. 2.0.
+// If a copy of the MPL was not distributed with this file, You can obtain one at http://mozilla.org/MPL/2.0/.
+// Copyright (C) LibreHardwareMonitor and Contributors.
+// All Rights Reserved.
+
+// ReSharper disable IdentifierTypo
+// ReSharper disable InconsistentNaming
+
+using System;
+using System.Runtime.InteropServices;
+
+namespace LibreHardwareMonitor.Interop
+{
+    internal static class CfgMgr32
+    {
+        internal const uint CM_GET_DEVICE_INTERFACE_LIST_PRESENT = 0;
+        internal const int CR_SUCCESS = 0;
+        internal static Guid GUID_DISPLAY_DEVICE_ARRIVAL = new("1CA05180-A699-450A-9A0C-DE4FBE3DDD89");
+        
+        internal const string DllName = "CfgMgr32.dll";
+
+        [DllImport(DllName, CharSet = CharSet.Unicode)]
+        internal static extern uint CM_Get_Device_Interface_List_Size(out uint size, ref Guid interfaceClassGuid, string deviceID, uint flags);
+
+        [DllImport(DllName, CharSet = CharSet.Unicode)]
+        internal static extern uint CM_Get_Device_Interface_List(ref Guid interfaceClassGuid, string deviceID, char[] buffer, uint bufferLength, uint flags);
+    }
+}

LibreHardwareMonitorLib/Interop/D3dkmdt.cs

@@ -0,0 +1,48 @@
+// This Source Code Form is subject to the terms of the Mozilla Public License, v. 2.0.
+// If a copy of the MPL was not distributed with this file, You can obtain one at http://mozilla.org/MPL/2.0/.
+// Copyright (C) LibreHardwareMonitor and Contributors.
+// All Rights Reserved.
+
+// ReSharper disable IdentifierTypo
+// ReSharper disable InconsistentNaming
+
+using System.Runtime.InteropServices;
+
+namespace LibreHardwareMonitor.Interop
+{
+    internal static class D3dkmdt
+    {
+        internal enum DXGK_ENGINE_TYPE
+        {
+            DXGK_ENGINE_TYPE_OTHER = 0,
+            DXGK_ENGINE_TYPE_3D = 1,
+            DXGK_ENGINE_TYPE_VIDEO_DECODE = 2,
+            DXGK_ENGINE_TYPE_VIDEO_ENCODE = 3,
+            DXGK_ENGINE_TYPE_VIDEO_PROCESSING = 4,
+            DXGK_ENGINE_TYPE_SCENE_ASSEMBLY = 5,
+            DXGK_ENGINE_TYPE_COPY = 6,
+            DXGK_ENGINE_TYPE_OVERLAY = 7,
+            DXGK_ENGINE_TYPE_CRYPTO,
+            DXGK_ENGINE_TYPE_MAX
+        }
+
+        [StructLayout(LayoutKind.Sequential)]
+        internal struct DXGK_NODEMETADATA_FLAGS
+        {
+            public uint Value;
+        }
+
+        [StructLayout(LayoutKind.Sequential, Pack = 1, CharSet = CharSet.Unicode)]
+        internal struct DXGK_NODEMETADATA
+        {
+            public DXGK_ENGINE_TYPE EngineType;
+
+            [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 32)]
+            public string FriendlyName;
+
+            public DXGK_NODEMETADATA_FLAGS Flags;
+            public byte GpuMmuSupported;
+            public byte IoMmuSupported;
+        }
+    }
+}

LibreHardwareMonitorLib/Interop/D3dkmth.cs

@@ -0,0 +1,563 @@
+// This Source Code Form is subject to the terms of the Mozilla Public License, v. 2.0.
+// If a copy of the MPL was not distributed with this file, You can obtain one at http://mozilla.org/MPL/2.0/.
+// Copyright (C) LibreHardwareMonitor and Contributors.
+// All Rights Reserved.
+
+// ReSharper disable IdentifierTypo
+// ReSharper disable InconsistentNaming
+
+using System;
+using System.Runtime.InteropServices;
+
+namespace LibreHardwareMonitor.Interop
+{
+    internal static class D3dkmth
+    {
+        [StructLayout(LayoutKind.Sequential)]
+        internal struct D3DKMT_CLOSEADAPTER
+        {
+            public uint hAdapter;
+        }
+
+        [StructLayout(LayoutKind.Sequential)]
+        internal struct D3DKMT_QUERYADAPTERINFO
+        {
+            public uint hAdapter;
+            public KMTQUERYADAPTERINFOTYPE Type;
+            public IntPtr pPrivateDriverData;
+            public int PrivateDriverDataSize;
+        }
+
+        [StructLayout(LayoutKind.Sequential)]
+        internal struct D3DKMT_OPENADAPTERFROMDEVICENAME
+        {
+            [MarshalAs(UnmanagedType.LPWStr)]
+            public string pDeviceName;
+
+            public uint hAdapter;
+            public WinNt.LUID AdapterLuid;
+        }
+
+        [StructLayout(LayoutKind.Sequential)]
+        internal struct D3DKMT_ADAPTERTYPE
+        {
+            public D3DKMT_ADAPTERTYPE_FLAGS Value;
+        }
+
+        [StructLayout(LayoutKind.Sequential)]
+        internal struct D3DKMT_QUERYSTATISTICS_QUERY_SEGMENT
+        {
+            public uint SegmentId;
+        }
+
+        [StructLayout(LayoutKind.Sequential)]
+        internal struct D3DKMT_QUERYSTATISTICS_QUERY_NODE
+        {
+            public uint NodeId;
+        }
+
+        [StructLayout(LayoutKind.Sequential)]
+        internal struct D3DKMT_QUERYSTATISTICS_QUERY_VIDPNSOURCE
+        {
+            public uint VidPnSourceId;
+        }
+
+        [StructLayout(LayoutKind.Sequential)]
+        internal struct D3DKMT_QUERYSTATISTICS_REFERENCE_DMA_BUFFER
+        {
+            public uint NbCall;
+            public uint NbAllocationsReferenced;
+            public uint MaxNbAllocationsReferenced;
+            public uint NbNULLReference;
+            public uint NbWriteReference;
+            public uint NbRenamedAllocationsReferenced;
+            public uint NbIterationSearchingRenamedAllocation;
+            public uint NbLockedAllocationReferenced;
+            public uint NbAllocationWithValidPrepatchingInfoReferenced;
+            public uint NbAllocationWithInvalidPrepatchingInfoReferenced;
+            public uint NbDMABufferSuccessfullyPrePatched;
+            public uint NbPrimariesReferencesOverflow;
+            public uint NbAllocationWithNonPreferredResources;
+            public uint NbAllocationInsertedInMigrationTable;
+        }
+
+        [StructLayout(LayoutKind.Sequential)]
+        internal struct D3DKMT_SEGMENTSIZEINFO
+        {
+            public ulong DedicatedVideoMemorySize;
+            public ulong DedicatedSystemMemorySize;
+            public ulong SharedSystemMemorySize;
+        }
+
+        [StructLayout(LayoutKind.Sequential)]
+        internal struct D3DKMT_QUERYSTATISTICS_RENAMING
+        {
+            public uint NbAllocationsRenamed;
+            public uint NbAllocationsShrinked;
+            public uint NbRenamedBuffer;
+            public uint MaxRenamingListLength;
+            public uint NbFailuresDueToRenamingLimit;
+            public uint NbFailuresDueToCreateAllocation;
+            public uint NbFailuresDueToOpenAllocation;
+            public uint NbFailuresDueToLowResource;
+            public uint NbFailuresDueToNonRetiredLimit;
+        }
+
+        [StructLayout(LayoutKind.Sequential)]
+        internal struct D3DKMT_QUERYSTATISTICS_COUNTER
+        {
+            public uint Count;
+            public ulong Bytes;
+        }
+
+        [StructLayout(LayoutKind.Sequential)]
+        internal struct D3DKMT_QUERYSTATISTICS_PREPRATION
+        {
+            public uint BroadcastStall;
+            public uint NbDMAPrepared;
+            public uint NbDMAPreparedLongPath;
+            public uint ImmediateHighestPreparationPass;
+            public D3DKMT_QUERYSTATISTICS_COUNTER AllocationsTrimmed;
+        }
+
+        [StructLayout(LayoutKind.Sequential)]
+        internal struct D3DKMT_QUERYSTATISTICS_PAGING_FAULT
+        {
+            public D3DKMT_QUERYSTATISTICS_COUNTER Faults;
+            public D3DKMT_QUERYSTATISTICS_COUNTER FaultsFirstTimeAccess;
+            public D3DKMT_QUERYSTATISTICS_COUNTER FaultsReclaimed;
+            public D3DKMT_QUERYSTATISTICS_COUNTER FaultsMigration;
+            public D3DKMT_QUERYSTATISTICS_COUNTER FaultsIncorrectResource;
+            public D3DKMT_QUERYSTATISTICS_COUNTER FaultsLostContent;
+            public D3DKMT_QUERYSTATISTICS_COUNTER FaultsEvicted;
+            public D3DKMT_QUERYSTATISTICS_COUNTER AllocationsMEM_RESET;
+            public D3DKMT_QUERYSTATISTICS_COUNTER AllocationsUnresetSuccess;
+            public D3DKMT_QUERYSTATISTICS_COUNTER AllocationsUnresetFail;
+
+            public uint AllocationsUnresetSuccessRead;
+            public uint AllocationsUnresetFailRead;
+
+            public D3DKMT_QUERYSTATISTICS_COUNTER Evictions;
+            public D3DKMT_QUERYSTATISTICS_COUNTER EvictionsDueToPreparation;
+            public D3DKMT_QUERYSTATISTICS_COUNTER EvictionsDueToLock;
+            public D3DKMT_QUERYSTATISTICS_COUNTER EvictionsDueToClose;
+            public D3DKMT_QUERYSTATISTICS_COUNTER EvictionsDueToPurge;
+            public D3DKMT_QUERYSTATISTICS_COUNTER EvictionsDueToSuspendCPUAccess;
+        }
+
+        [StructLayout(LayoutKind.Sequential)]
+        internal struct D3DKMT_QUERYSTATISTICS_PAGING_TRANSFER
+        {
+            public ulong BytesFilled;
+            public ulong BytesDiscarded;
+            public ulong BytesMappedIntoAperture;
+            public ulong BytesUnmappedFromAperture;
+            public ulong BytesTransferredFromMdlToMemory;
+            public ulong BytesTransferredFromMemoryToMdl;
+            public ulong BytesTransferredFromApertureToMemory;
+            public ulong BytesTransferredFromMemoryToAperture;
+        }
+
+        [StructLayout(LayoutKind.Sequential)]
+        internal struct D3DKMT_QUERYSTATISTICS_SWIZZLING_RANGE
+        {
+            public uint NbRangesAcquired;
+            public uint NbRangesReleased;
+        }
+
+        [StructLayout(LayoutKind.Sequential)]
+        internal struct D3DKMT_QUERYSTATISTICS_LOCKS
+        {
+            public uint NbLocks;
+            public uint NbLocksWaitFlag;
+            public uint NbLocksDiscardFlag;
+            public uint NbLocksNoOverwrite;
+            public uint NbLocksNoReadSync;
+            public uint NbLocksLinearization;
+            public uint NbComplexLocks;
+        }
+
+        [StructLayout(LayoutKind.Sequential)]
+        internal struct D3DKMT_QUERYSTATISTICS_ALLOCATIONS
+        {
+            public D3DKMT_QUERYSTATISTICS_COUNTER Created;
+            public D3DKMT_QUERYSTATISTICS_COUNTER Destroyed;
+            public D3DKMT_QUERYSTATISTICS_COUNTER Opened;
+            public D3DKMT_QUERYSTATISTICS_COUNTER Closed;
+            public D3DKMT_QUERYSTATISTICS_COUNTER MigratedSuccess;
+            public D3DKMT_QUERYSTATISTICS_COUNTER MigratedFail;
+            public D3DKMT_QUERYSTATISTICS_COUNTER MigratedAbandoned;
+        }
+
+        [StructLayout(LayoutKind.Sequential)]
+        internal struct D3DKMT_QUERYSTATISTICS_TERMINATIONS
+        {
+            public D3DKMT_QUERYSTATISTICS_COUNTER TerminatedShared;
+            public D3DKMT_QUERYSTATISTICS_COUNTER TerminatedNonShared;
+            public D3DKMT_QUERYSTATISTICS_COUNTER DestroyedShared;
+            public D3DKMT_QUERYSTATISTICS_COUNTER DestroyedNonShared;
+        }
+
+        [StructLayout(LayoutKind.Sequential)]
+        internal struct D3DKMT_QUERYSTATISTICS_ADAPTER_INFORMATION
+        {
+            public uint NbSegments;
+            public uint NodeCount;
+            public uint VidPnSourceCount;
+
+            public uint VSyncEnabled;
+            public uint TdrDetectedCount;
+
+            public long ZeroLengthDmaBuffers;
+            public ulong RestartedPeriod;
+
+            public D3DKMT_QUERYSTATISTICS_REFERENCE_DMA_BUFFER ReferenceDmaBuffer;
+            public D3DKMT_QUERYSTATISTICS_RENAMING Renaming;
+            public D3DKMT_QUERYSTATISTICS_PREPRATION Preparation;
+            public D3DKMT_QUERYSTATISTICS_PAGING_FAULT PagingFault;
+            public D3DKMT_QUERYSTATISTICS_PAGING_TRANSFER PagingTransfer;
+            public D3DKMT_QUERYSTATISTICS_SWIZZLING_RANGE SwizzlingRange;
+            public D3DKMT_QUERYSTATISTICS_LOCKS Locks;
+            public D3DKMT_QUERYSTATISTICS_ALLOCATIONS Allocations;
+            public D3DKMT_QUERYSTATISTICS_TERMINATIONS Terminations;
+
+            private readonly ulong Reserved;
+            private readonly ulong Reserved1;
+            private readonly ulong Reserved2;
+            private readonly ulong Reserved3;
+            private readonly ulong Reserved4;
+            private readonly ulong Reserved5;
+            private readonly ulong Reserved6;
+            private readonly ulong Reserved7;
+        }
+
+        [StructLayout(LayoutKind.Sequential)]
+        internal struct D3DKMT_QUERYSTATISTICS_MEMORY
+        {
+            public ulong TotalBytesEvicted;
+            public uint AllocsCommitted;
+            public uint AllocsResident;
+        }
+
+        [StructLayout(LayoutKind.Sequential)]
+        internal unsafe struct D3DKMT_QUERYSTATISTICS_SEGMENT_INFORMATION
+        {
+            public ulong CommitLimit;
+            public ulong BytesCommitted;
+            public ulong BytesResident;
+            public D3DKMT_QUERYSTATISTICS_MEMORY Memory;
+            public uint Aperture; // boolean
+            public fixed ulong TotalBytesEvictedByPriority[5]; // D3DKMT_QUERYSTATISTICS_SEGMENT_PREFERENCE_MAX
+            public ulong SystemMemoryEndAddress;
+            public D3DKMT_QUERYSTATISTICS_SEGMENT_INFORMATION_POWER_FLAGS PowerFlags;
+            public fixed ulong Reserved[6];
+        }
+
+        [StructLayout(LayoutKind.Explicit)]
+        internal struct D3DKMT_QUERYSTATISTICS_SEGMENT_INFORMATION_POWER_FLAGS
+        {
+            [FieldOffset(0)]
+            public ulong PreservedDuringStandby;
+
+            [FieldOffset(1)]
+            public ulong PreservedDuringHibernate;
+
+            [FieldOffset(2)]
+            public ulong PartiallyPreservedDuringHibernate;
+
+            [FieldOffset(3)]
+            public ulong Reserved;
+        }
+
+        [StructLayout(LayoutKind.Sequential)]
+        internal struct D3DKMT_QUERYSTATISTICS_VIDEO_MEMORY
+        {
+            public uint AllocsCommitted;
+            public D3DKMT_QUERYSTATISTICS_COUNTER AllocsResidentIn0;
+            public D3DKMT_QUERYSTATISTICS_COUNTER AllocsResidentIn1;
+            public D3DKMT_QUERYSTATISTICS_COUNTER AllocsResidentIn2;
+            public D3DKMT_QUERYSTATISTICS_COUNTER AllocsResidentIn3;
+            public D3DKMT_QUERYSTATISTICS_COUNTER AllocsResidentIn4;
+            public D3DKMT_QUERYSTATISTICS_COUNTER AllocsResidentInNonPreferred;
+            public ulong TotalBytesEvictedDueToPreparation;
+        }
+
+        [StructLayout(LayoutKind.Sequential)]
+        internal struct D3DKMT_QUERYSTATISTICS_PROCESS_SEGMENT_POLICY
+        {
+            public ulong UseMRU;
+        }
+
+        [StructLayout(LayoutKind.Sequential)]
+        internal unsafe struct D3DKMT_QUERYSTATISTICS_PROCESS_SEGMENT_INFORMATION
+        {
+            public ulong BytesCommitted;
+            public ulong MaximumWorkingSet;
+            public ulong MinimumWorkingSet;
+
+            public uint NbReferencedAllocationEvictedInPeriod;
+
+            public D3DKMT_QUERYSTATISTICS_VIDEO_MEMORY VideoMemory;
+            public D3DKMT_QUERYSTATISTICS_PROCESS_SEGMENT_POLICY _Policy;
+
+            public fixed ulong Reserved[8];
+        }
+
+        [StructLayout(LayoutKind.Sequential)]
+        internal struct D3DKMT_QUERYSTATISTICS_PREEMPTION_INFORMATION
+        {
+            public uint PreemptionCounter;
+            public uint PreemptionCounter1;
+            public uint PreemptionCounter2;
+            public uint PreemptionCounter3;
+            public uint PreemptionCounter4;
+            public uint PreemptionCounter5;
+            public uint PreemptionCounter6;
+            public uint PreemptionCounter7;
+            public uint PreemptionCounter8;
+            public uint PreemptionCounter9;
+            public uint PreemptionCounter10;
+            public uint PreemptionCounter11;
+            public uint PreemptionCounter12;
+            public uint PreemptionCounter13;
+            public uint PreemptionCounter14;
+            public uint PreemptionCounter15;
+        }
+
+        [StructLayout(LayoutKind.Sequential)]
+        internal unsafe struct D3DKMT_QUERYSTATISTICS_PROCESS_NODE_INFORMATION
+        {
+            public WinNt.LARGE_INTEGER RunningTime; // 100ns
+            public uint ContextSwitch;
+            readonly D3DKMT_QUERYSTATISTICS_PREEMPTION_INFORMATION PreemptionStatistics;
+            readonly D3DKMT_QUERYSTATISTICS_PACKET_INFORMATION PacketStatistics;
+            private fixed ulong Reserved[8];
+        }
+
+        [StructLayout(LayoutKind.Sequential)]
+        internal unsafe struct D3DKMT_QUERYSTATISTICS_NODE_INFORMATION
+        {
+            public D3DKMT_QUERYSTATISTICS_PROCESS_NODE_INFORMATION GlobalInformation; // global
+
+            public D3DKMT_QUERYSTATISTICS_PROCESS_NODE_INFORMATION SystemInformation; // system thread
+
+            //public UInt32 NodeId; // Win10
+            public fixed ulong Reserved[8];
+        }
+
+        internal struct D3DKMT_QUERYSTATISTICS_DMA_PACKET_TYPE_INFORMATION
+        {
+            public uint PacketSubmitted;
+            public uint PacketCompleted;
+            public uint PacketPreempted;
+            public uint PacketFaulted;
+        }
+
+        [StructLayout(LayoutKind.Sequential)]
+        internal struct D3DKMT_QUERYSTATISTICS_QUEUE_PACKET_TYPE_INFORMATION
+        {
+            public uint PacketSubmited;
+            public uint PacketCompleted;
+        }
+
+        [StructLayout(LayoutKind.Sequential)]
+        internal struct D3DKMT_QUERYSTATISTICS_PACKET_INFORMATION
+        {
+            public D3DKMT_QUERYSTATISTICS_QUEUE_PACKET_TYPE_INFORMATION QueuePacket;
+            public D3DKMT_QUERYSTATISTICS_QUEUE_PACKET_TYPE_INFORMATION QueuePacket1;
+            public D3DKMT_QUERYSTATISTICS_QUEUE_PACKET_TYPE_INFORMATION QueuePacket2;
+            public D3DKMT_QUERYSTATISTICS_QUEUE_PACKET_TYPE_INFORMATION QueuePacket3;
+            public D3DKMT_QUERYSTATISTICS_QUEUE_PACKET_TYPE_INFORMATION QueuePacket4;
+            public D3DKMT_QUERYSTATISTICS_QUEUE_PACKET_TYPE_INFORMATION QueuePacket5;
+            public D3DKMT_QUERYSTATISTICS_QUEUE_PACKET_TYPE_INFORMATION QueuePacket6;
+            public D3DKMT_QUERYSTATISTICS_QUEUE_PACKET_TYPE_INFORMATION QueuePacket7;
+
+            public D3DKMT_QUERYSTATISTICS_DMA_PACKET_TYPE_INFORMATION DmaPacket;
+            public D3DKMT_QUERYSTATISTICS_DMA_PACKET_TYPE_INFORMATION DmaPacket1;
+            public D3DKMT_QUERYSTATISTICS_DMA_PACKET_TYPE_INFORMATION DmaPacket2;
+            public D3DKMT_QUERYSTATISTICS_DMA_PACKET_TYPE_INFORMATION DmaPacket3;
+        }
+
+        [StructLayout(LayoutKind.Explicit)]
+        internal struct D3DKMT_QUERYSTATISTICS_RESULT
+        {
+            [FieldOffset(8)]
+            public D3DKMT_QUERYSTATISTICS_ADAPTER_INFORMATION AdapterInformation;
+
+            [FieldOffset(8)]
+            public D3DKMT_QUERYSTATISTICS_SEGMENT_INFORMATION SegmentInformation;
+
+            [FieldOffset(8)]
+            public D3DKMT_QUERYSTATISTICS_PROCESS_SEGMENT_INFORMATION ProcessSegmentInformation;
+
+            [FieldOffset(8)]
+            public D3DKMT_QUERYSTATISTICS_NODE_INFORMATION NodeInformation;
+
+            // D3DKMT_QUERYSTATISTICS_PROCESS_INFORMATION ProcessInformation;
+            // D3DKMT_QUERYSTATISTICS_PROCESS_NODE_INFORMATION ProcessNodeInformation;
+            // D3DKMT_QUERYSTATISTICS_PHYSICAL_ADAPTER_INFORMATION PhysAdapterInformation;
+            // D3DKMT_QUERYSTATISTICS_SEGMENT_INFORMATION_V1 SegmentInformationV1; // WIN7
+            // D3DKMT_QUERYSTATISTICS_VIDPNSOURCE_INFORMATION VidPnSourceInformation;
+            // D3DKMT_QUERYSTATISTICS_PROCESS_ADAPTER_INFORMATION ProcessAdapterInformation;
+            // D3DKMT_QUERYSTATISTICS_PROCESS_VIDPNSOURCE_INFORMATION ProcessVidPnSourceInformation;
+            // D3DKMT_QUERYSTATISTICS_PROCESS_SEGMENT_GROUP_INFORMATION ProcessSegmentGroupInformation;
+        }
+
+        [StructLayout(LayoutKind.Explicit)]
+        internal struct D3DKMT_QUERYSTATISTICS_QUERY_ELEMENT
+        {
+            [FieldOffset(0)]
+            public D3DKMT_QUERYSTATISTICS_QUERY_SEGMENT QuerySegment;
+
+            [FieldOffset(0)]
+            public D3DKMT_QUERYSTATISTICS_QUERY_SEGMENT QueryProcessSegment;
+
+            [FieldOffset(0)]
+            public D3DKMT_QUERYSTATISTICS_QUERY_NODE QueryNode;
+
+            [FieldOffset(0)]
+            public D3DKMT_QUERYSTATISTICS_QUERY_NODE QueryProcessNode;
+
+            [FieldOffset(0)]
+            public D3DKMT_QUERYSTATISTICS_QUERY_VIDPNSOURCE QueryVidPnSource;
+
+            [FieldOffset(0)]
+            public D3DKMT_QUERYSTATISTICS_QUERY_VIDPNSOURCE QueryProcessVidPnSource;
+        }
+
+        [StructLayout(LayoutKind.Sequential)]
+        internal struct D3DKMT_QUERYSTATISTICS
+        {
+            public D3DKMT_QUERYSTATISTICS_TYPE Type;
+            public WinNt.LUID AdapterLuid;
+            public uint ProcessHandle;
+            public D3DKMT_QUERYSTATISTICS_RESULT QueryResult;
+            public D3DKMT_QUERYSTATISTICS_QUERY_ELEMENT QueryElement;
+        }
+        
+        [StructLayout(LayoutKind.Sequential, Pack = 1)]
+        internal struct D3DKMT_NODEMETADATA
+        {
+            public uint NodeOrdinalAndAdapterIndex;
+            public D3dkmdt.DXGK_NODEMETADATA NodeData;
+        }
+
+        [Flags]
+        internal enum D3DKMT_ADAPTERTYPE_FLAGS : uint
+        {
+            RenderSupported = 0,
+            DisplaySupported = 1,
+            SoftwareDevice = 2,
+            PostDevice = 4,
+            HybridDiscrete = 8,
+            HybridIntegrated = 16,
+            IndirectDisplayDevice = 32,
+            Paravirtualized = 64,
+            ACGSupported = 128,
+            SupportSetTimingsFromVidPn = 256,
+            Detachable = 512,
+            ComputeOnly = 1024,
+            Prototype = 2045
+        }
+
+        internal enum D3DKMT_QUERYSTATISTICS_TYPE
+        {
+            D3DKMT_QUERYSTATISTICS_ADAPTER,
+            D3DKMT_QUERYSTATISTICS_PROCESS,
+            D3DKMT_QUERYSTATISTICS_PROCESS_ADAPTER,
+            D3DKMT_QUERYSTATISTICS_SEGMENT,
+            D3DKMT_QUERYSTATISTICS_PROCESS_SEGMENT,
+            D3DKMT_QUERYSTATISTICS_NODE,
+            D3DKMT_QUERYSTATISTICS_PROCESS_NODE,
+            D3DKMT_QUERYSTATISTICS_VIDPNSOURCE,
+            D3DKMT_QUERYSTATISTICS_PROCESS_VIDPNSOURCE,
+            D3DKMT_QUERYSTATISTICS_PROCESS_SEGMENT_GROUP,
+            D3DKMT_QUERYSTATISTICS_PHYSICAL_ADAPTER
+        }
+
+        internal enum D3DKMT_QUERYSTATISTICS_DMA_PACKET_TYPE
+        {
+            D3DKMT_ClientRenderBuffer = 0,
+            D3DKMT_ClientPagingBuffer = 1,
+            D3DKMT_SystemPagingBuffer = 2,
+            D3DKMT_SystemPreemptionBuffer = 3,
+            D3DKMT_DmaPacketTypeMax
+        }
+
+        internal enum KMTQUERYADAPTERINFOTYPE
+        {
+            KMTQAITYPE_UMDRIVERPRIVATE = 0,
+            KMTQAITYPE_UMDRIVERNAME = 1,
+            KMTQAITYPE_UMOPENGLINFO = 2,
+            KMTQAITYPE_GETSEGMENTSIZE = 3,
+            KMTQAITYPE_ADAPTERGUID = 4,
+            KMTQAITYPE_FLIPQUEUEINFO = 5,
+            KMTQAITYPE_ADAPTERADDRESS = 6,
+            KMTQAITYPE_SETWORKINGSETINFO = 7,
+            KMTQAITYPE_ADAPTERREGISTRYINFO = 8,
+            KMTQAITYPE_CURRENTDISPLAYMODE = 9,
+            KMTQAITYPE_MODELIST = 10,
+            KMTQAITYPE_CHECKDRIVERUPDATESTATUS = 11,
+            KMTQAITYPE_VIRTUALADDRESSINFO = 12,
+            KMTQAITYPE_DRIVERVERSION = 13,
+            KMTQAITYPE_ADAPTERTYPE = 15,
+            KMTQAITYPE_OUTPUTDUPLCONTEXTSCOUNT = 16,
+            KMTQAITYPE_WDDM_1_2_CAPS = 17,
+            KMTQAITYPE_UMD_DRIVER_VERSION = 18,
+            KMTQAITYPE_DIRECTFLIP_SUPPORT = 19,
+            KMTQAITYPE_MULTIPLANEOVERLAY_SUPPORT = 20,
+            KMTQAITYPE_DLIST_DRIVER_NAME = 21,
+            KMTQAITYPE_WDDM_1_3_CAPS = 22,
+            KMTQAITYPE_MULTIPLANEOVERLAY_HUD_SUPPORT = 23,
+            KMTQAITYPE_WDDM_2_0_CAPS = 24,
+            KMTQAITYPE_NODEMETADATA = 25,
+            KMTQAITYPE_CPDRIVERNAME = 26,
+            KMTQAITYPE_XBOX = 27,
+            KMTQAITYPE_INDEPENDENTFLIP_SUPPORT = 28,
+            KMTQAITYPE_MIRACASTCOMPANIONDRIVERNAME = 29,
+            KMTQAITYPE_PHYSICALADAPTERCOUNT = 30,
+            KMTQAITYPE_PHYSICALADAPTERDEVICEIDS = 31,
+            KMTQAITYPE_DRIVERCAPS_EXT = 32,
+            KMTQAITYPE_QUERY_MIRACAST_DRIVER_TYPE = 33,
+            KMTQAITYPE_QUERY_GPUMMU_CAPS = 34,
+            KMTQAITYPE_QUERY_MULTIPLANEOVERLAY_DECODE_SUPPORT = 35,
+            KMTQAITYPE_QUERY_HW_PROTECTION_TEARDOWN_COUNT = 36,
+            KMTQAITYPE_QUERY_ISBADDRIVERFORHWPROTECTIONDISABLED = 37,
+            KMTQAITYPE_MULTIPLANEOVERLAY_SECONDARY_SUPPORT = 38,
+            KMTQAITYPE_INDEPENDENTFLIP_SECONDARY_SUPPORT = 39,
+            KMTQAITYPE_PANELFITTER_SUPPORT = 40,
+            KMTQAITYPE_PHYSICALADAPTERPNPKEY = 41,
+            KMTQAITYPE_GETSEGMENTGROUPSIZE = 42,
+            KMTQAITYPE_MPO3DDI_SUPPORT = 43,
+            KMTQAITYPE_HWDRM_SUPPORT = 44,
+            KMTQAITYPE_MPOKERNELCAPS_SUPPORT = 45,
+            KMTQAITYPE_MULTIPLANEOVERLAY_STRETCH_SUPPORT = 46,
+            KMTQAITYPE_GET_DEVICE_VIDPN_OWNERSHIP_INFO = 47,
+            KMTQAITYPE_QUERYREGISTRY = 48,
+            KMTQAITYPE_KMD_DRIVER_VERSION = 49,
+            KMTQAITYPE_BLOCKLIST_KERNEL = 50,
+            KMTQAITYPE_BLOCKLIST_RUNTIME = 51,
+            KMTQAITYPE_ADAPTERGUID_RENDER = 52,
+            KMTQAITYPE_ADAPTERADDRESS_RENDER = 53,
+            KMTQAITYPE_ADAPTERREGISTRYINFO_RENDER = 54,
+            KMTQAITYPE_CHECKDRIVERUPDATESTATUS_RENDER = 55,
+            KMTQAITYPE_DRIVERVERSION_RENDER = 56,
+            KMTQAITYPE_ADAPTERTYPE_RENDER = 57,
+            KMTQAITYPE_WDDM_1_2_CAPS_RENDER = 58,
+            KMTQAITYPE_WDDM_1_3_CAPS_RENDER = 59,
+            KMTQAITYPE_QUERY_ADAPTER_UNIQUE_GUID = 60,
+            KMTQAITYPE_NODEPERFDATA = 61,
+            KMTQAITYPE_ADAPTERPERFDATA = 62,
+            KMTQAITYPE_ADAPTERPERFDATA_CAPS = 63,
+            KMTQUITYPE_GPUVERSION = 64,
+            KMTQAITYPE_DRIVER_DESCRIPTION = 65,
+            KMTQAITYPE_DRIVER_DESCRIPTION_RENDER = 66,
+            KMTQAITYPE_SCANOUT_CAPS = 67,
+            KMTQAITYPE_DISPLAY_UMDRIVERNAME = 71,
+            KMTQAITYPE_PARAVIRTUALIZATION_RENDER = 68,
+            KMTQAITYPE_SERVICENAME = 69,
+            KMTQAITYPE_WDDM_2_7_CAPS = 70,
+            KMTQAITYPE_TRACKEDWORKLOAD_SUPPORT = 72,
+        }
+    }
+}

LibreHardwareMonitorLib/Interop/Gdi32.cs

@@ -0,0 +1,29 @@
+// This Source Code Form is subject to the terms of the Mozilla Public License, v. 2.0.
+// If a copy of the MPL was not distributed with this file, You can obtain one at http://mozilla.org/MPL/2.0/.
+// Copyright (C) LibreHardwareMonitor and Contributors.
+// All Rights Reserved.
+
+// ReSharper disable IdentifierTypo
+// ReSharper disable InconsistentNaming
+
+using System.Runtime.InteropServices;
+
+namespace LibreHardwareMonitor.Interop
+{
+    internal static class Gdi32
+    {
+        internal const string DllName = "Gdi32.dll";
+        
+        [DllImport(DllName, ExactSpelling = true)]
+        internal static extern uint D3DKMTCloseAdapter(ref D3dkmth.D3DKMT_CLOSEADAPTER closeAdapter);
+
+        [DllImport(DllName, ExactSpelling = true)]
+        internal static extern uint D3DKMTOpenAdapterFromDeviceName(ref D3dkmth.D3DKMT_OPENADAPTERFROMDEVICENAME openAdapterFromDeviceName);
+
+        [DllImport(DllName, ExactSpelling = true)]
+        internal static extern uint D3DKMTQueryAdapterInfo(ref D3dkmth.D3DKMT_QUERYADAPTERINFO queryAdapterInfo);
+
+        [DllImport(DllName, ExactSpelling = true)]
+        internal static extern uint D3DKMTQueryStatistics(ref D3dkmth.D3DKMT_QUERYSTATISTICS queryStatistics);
+    }
+}

LibreHardwareMonitorLib/Interop/NvidiaML.cs

@@ -14,291 +14,25 @@ namespace LibreHardwareMonitor.Interop
         private const string LinuxDllName = "nvidia-ml";
         private const string WindowsDllName = "nvml.dll";
 
-        private static readonly object SyncRoot = new object();
+        private static readonly object _syncRoot = new();
+
+        private static IntPtr _windowsDll;
 
         private static WindowsNvmlGetHandleDelegate _windowsNvmlDeviceGetHandleByIndex;
-        private static WindowsNvmlGetPowerUsageDelegate _windowsNvmlDeviceGetPowerUsage;
-        private static WindowsNvmlDeviceGetPcieThroughputDelegate _windowsNvmlDeviceGetPcieThroughputDelegate;
         private static WindowsNvmlGetHandleByPciBusIdDelegate _windowsNvmlDeviceGetHandleByPciBusId;
+        private static WindowsNvmlDeviceGetPcieThroughputDelegate _windowsNvmlDeviceGetPcieThroughputDelegate;
+        private static WindowsNvmlGetPowerUsageDelegate _windowsNvmlDeviceGetPowerUsage;
+        private static WindowsNvmlDeviceGetPciInfo _windowsNvmlDeviceGetPciInfo;
         private static WindowsNvmlDelegate _windowsNvmlInit;
         private static WindowsNvmlDelegate _windowsNvmlShutdown;
 
-        private static IntPtr WindowsDll;
-
-        internal static bool IsAvailable { get; private set; }
-
-        internal static bool Initialize()
-        {
-            lock (SyncRoot)
-            {
-                if (IsAvailable)
-                {
-                    return true;
-                }
-
-                if (Software.OperatingSystem.IsUnix)
-                {
-                    try
-                    {
-                        IsAvailable = nvmlInit() == NvmlReturn.Success;
-                    }
-                    catch (DllNotFoundException)
-                    { }
-                    catch (EntryPointNotFoundException)
-                    {
-                        try
-                        {
-                            IsAvailable = nvmlInitLegacy() == NvmlReturn.Success;
-                        }
-                        catch (EntryPointNotFoundException)
-                        { }
-                    }
-                }
-                else if (IsNvmlCompatibleWindowsVersion())
-                {
-                    // Attempt to load the Nvidia Management Library from the
-                    // windows standard search order for applications. This will
-                    // help installations that either have the library in
-                    // %windir%/system32 or provide their own library
-                    WindowsDll = Kernel32.LoadLibrary(WindowsDllName);
-
-                    // If there is no dll in the path, then attempt to load it
-                    // from program files
-                    if (WindowsDll == IntPtr.Zero)
-                    {
-                        string programFilesDirectory = Environment.ExpandEnvironmentVariables("%ProgramW6432%");
-                        string dllPath = Path.Combine(programFilesDirectory, @"NVIDIA Corporation\NVSMI", WindowsDllName);
-
-                        WindowsDll = Kernel32.LoadLibrary(dllPath);
-                    }
-
-                    IsAvailable = (WindowsDll != IntPtr.Zero) 
-                        && InitialiseDelegates() 
-                        && (_windowsNvmlInit() == NvmlReturn.Success);
-                }
-
-                return IsAvailable;
-            }
-        }
-
-        private static bool IsNvmlCompatibleWindowsVersion()
-        {
-            return Software.OperatingSystem.Is64Bit && ((Environment.OSVersion.Version.Major > 6) || (Environment.OSVersion.Version.Major == 6 && Environment.OSVersion.Version.Minor >= 1));
-        }
-
-        private static bool InitialiseDelegates()
-        {
-            IntPtr nvmlInit = Kernel32.GetProcAddress(WindowsDll, "nvmlInit_v2");
-
-            if (nvmlInit != IntPtr.Zero)
-            {
-                _windowsNvmlInit = (WindowsNvmlDelegate)Marshal.GetDelegateForFunctionPointer(nvmlInit, typeof(WindowsNvmlDelegate));
-            }
-            else
-            {
-                nvmlInit = Kernel32.GetProcAddress(WindowsDll, "nvmlInit");
-                if (nvmlInit != IntPtr.Zero)
-                    _windowsNvmlInit = (WindowsNvmlDelegate)Marshal.GetDelegateForFunctionPointer(nvmlInit, typeof(WindowsNvmlDelegate));
-                else
-                    return false;
-            }
-
-            IntPtr nvmlShutdown = Kernel32.GetProcAddress(WindowsDll, "nvmlShutdown");
-            if (nvmlShutdown != IntPtr.Zero)
-                _windowsNvmlShutdown = (WindowsNvmlDelegate)Marshal.GetDelegateForFunctionPointer(nvmlShutdown, typeof(WindowsNvmlDelegate));
-            else
-                return false;
-
-
-            IntPtr nvmlGetHandle = Kernel32.GetProcAddress(WindowsDll, "nvmlDeviceGetHandleByIndex_v2");
-            if (nvmlGetHandle != IntPtr.Zero)
-            {
-                _windowsNvmlDeviceGetHandleByIndex = (WindowsNvmlGetHandleDelegate)Marshal.GetDelegateForFunctionPointer(nvmlGetHandle, typeof(WindowsNvmlGetHandleDelegate));
-            }
-            else
-            {
-                nvmlGetHandle = Kernel32.GetProcAddress(WindowsDll, "nvmlDeviceGetHandleByIndex");
-                if (nvmlGetHandle != IntPtr.Zero)
-                    _windowsNvmlDeviceGetHandleByIndex = (WindowsNvmlGetHandleDelegate)Marshal.GetDelegateForFunctionPointer(nvmlGetHandle, typeof(WindowsNvmlGetHandleDelegate));
-                else
-                    return false;
-            }
-
-            IntPtr nvmlGetPowerUsage = Kernel32.GetProcAddress(WindowsDll, "nvmlDeviceGetPowerUsage");
-            if (nvmlGetPowerUsage != IntPtr.Zero)
-                _windowsNvmlDeviceGetPowerUsage = (WindowsNvmlGetPowerUsageDelegate)Marshal.GetDelegateForFunctionPointer(nvmlGetPowerUsage, typeof(WindowsNvmlGetPowerUsageDelegate));
-            else
-                return false;
-
-            IntPtr nvmlGetPcieThroughput = Kernel32.GetProcAddress(WindowsDll, "nvmlDeviceGetPcieThroughput");
-            if (nvmlGetPcieThroughput != IntPtr.Zero)
-                _windowsNvmlDeviceGetPcieThroughputDelegate = (WindowsNvmlDeviceGetPcieThroughputDelegate)Marshal.GetDelegateForFunctionPointer(nvmlGetPcieThroughput, typeof(WindowsNvmlDeviceGetPcieThroughputDelegate));
-            else
-                return false;
-
-            IntPtr nvmlGetHandlePciBus = Kernel32.GetProcAddress(WindowsDll, "nvmlDeviceGetHandleByPciBusId_v2");
-            if (nvmlGetHandlePciBus != IntPtr.Zero)
-                _windowsNvmlDeviceGetHandleByPciBusId = (WindowsNvmlGetHandleByPciBusIdDelegate)Marshal.GetDelegateForFunctionPointer(nvmlGetHandlePciBus, typeof(WindowsNvmlGetHandleByPciBusIdDelegate));
-            else
-                return false;
-
-            return true;
-        }
-
-        internal static void Close()
-        {
-            lock (SyncRoot)
-            {
-                if (IsAvailable)
-                {
-                    if (Software.OperatingSystem.IsUnix)
-                    {
-                        nvmlShutdown();
-                    }
-                    else if (WindowsDll != IntPtr.Zero)
-                    {
-                        _windowsNvmlShutdown();
-                        Kernel32.FreeLibrary(WindowsDll);
-                    }
-
-                    IsAvailable = false;
-                }
-            }
-        }
-
-        internal static NvmlDevice? NvmlDeviceGetHandleByIndex(int index)
-        {
-            if (IsAvailable)
-            {
-                NvmlDevice nvmlDevice;
-                if (Software.OperatingSystem.IsUnix)
-                {
-                    try
-                    {
-                        if (nvmlDeviceGetHandleByIndex(index, out nvmlDevice) == NvmlReturn.Success)
-                            return nvmlDevice;
-                    }
-                    catch (EntryPointNotFoundException)
-                    {
-                        if (nvmlDeviceGetHandleByIndexLegacy(index, out nvmlDevice) == NvmlReturn.Success)
-                            return nvmlDevice;
-                    }
-                }
-                else if (_windowsNvmlDeviceGetHandleByIndex(index, out nvmlDevice) == NvmlReturn.Success)
-                {
-                    return nvmlDevice;
-                }
-            }
-
-            return null;
-        }
-
-
-        internal static NvmlDevice? NvmlDeviceGetHandleByPciBusId(string pciBusId)
-        {
-            if (IsAvailable)
-            {
-                NvmlDevice nvmlDevice;
-                if (Software.OperatingSystem.IsUnix)
-                {
-                    if (nvmlDeviceGetHandleByPciBusId(pciBusId, out nvmlDevice) == NvmlReturn.Success)
-                        return nvmlDevice;
-                }
-                else if (_windowsNvmlDeviceGetHandleByPciBusId(pciBusId, out nvmlDevice) == NvmlReturn.Success)
-                {
-                    return nvmlDevice;
-                }
-            }
-
-            return null;
-        }
-
-        internal static int? NvmlDeviceGetPowerUsage(NvmlDevice nvmlDevice)
-        {
-            if (IsAvailable)
-            {
-                int powerUsage;
-                if (Software.OperatingSystem.IsUnix)
-                {
-                    if (nvmlDeviceGetPowerUsage(nvmlDevice, out powerUsage) == NvmlReturn.Success)
-                        return powerUsage;
-                }
-                else if (_windowsNvmlDeviceGetPowerUsage(nvmlDevice, out powerUsage) == NvmlReturn.Success)
-                {
-                    return powerUsage;
-                }
-            }
-
-            return null;
-        }
-
-        internal static uint? NvmlDeviceGetPcieThroughput(NvmlDevice nvmlDevice, NvmlPcieUtilCounter counter)
-        {
-            if (IsAvailable)
-            {
-                uint pcieThroughput;
-                if (Software.OperatingSystem.IsUnix)
-                {
-                    if (nvmlDeviceGetPcieThroughput(nvmlDevice, counter, out pcieThroughput) == NvmlReturn.Success)
-                        return pcieThroughput;
-                }
-                else if (_windowsNvmlDeviceGetPcieThroughputDelegate(nvmlDevice, counter, out pcieThroughput) == NvmlReturn.Success)
-                {
-                    return pcieThroughput;
-                }
-            }
-
-            return null;
-        }
-
-
-        [DllImport(LinuxDllName, EntryPoint = "nvmlInit_v2", ExactSpelling = true)]
-        private static extern NvmlReturn nvmlInit();
-
-        [DllImport(LinuxDllName, EntryPoint = "nvmlInit", ExactSpelling = true)]
-        private static extern NvmlReturn nvmlInitLegacy();
-
-        [DllImport(LinuxDllName, EntryPoint = "nvmlShutdown", ExactSpelling = true)]
-        private static extern NvmlReturn nvmlShutdown();
-
-        [DllImport(LinuxDllName, EntryPoint = "nvmlDeviceGetHandleByIndex_v2", ExactSpelling = true)]
-        private static extern NvmlReturn nvmlDeviceGetHandleByIndex(int index, out NvmlDevice device);
-
-        [DllImport(LinuxDllName, EntryPoint = "nvmlDeviceGetHandleByPciBusId_v2", ExactSpelling = true)]
-        private static extern NvmlReturn nvmlDeviceGetHandleByPciBusId([MarshalAs(UnmanagedType.LPStr)] string pciBusId, out NvmlDevice device);
-
-        [DllImport(LinuxDllName, EntryPoint = "nvmlDeviceGetHandleByIndex", ExactSpelling = true)]
-        private static extern NvmlReturn nvmlDeviceGetHandleByIndexLegacy(int index, out NvmlDevice device);
-
-        [DllImport(LinuxDllName, EntryPoint = "nvmlDeviceGetPowerUsage", ExactSpelling = true)]
-        private static extern NvmlReturn nvmlDeviceGetPowerUsage(NvmlDevice device, out int power);
-
-        [DllImport(LinuxDllName, EntryPoint = "nvmlDeviceGetPcieThroughput", ExactSpelling = true)]
-        private static extern NvmlReturn nvmlDeviceGetPcieThroughput(NvmlDevice device, NvmlPcieUtilCounter counter, out uint value);
-
-        private delegate NvmlReturn WindowsNvmlDelegate();
-
-        private delegate NvmlReturn WindowsNvmlGetHandleDelegate(int index, out NvmlDevice device);
-
-        private delegate NvmlReturn WindowsNvmlGetHandleByPciBusIdDelegate([MarshalAs(UnmanagedType.LPStr)] string pciBusId, out NvmlDevice device);
-
-        private delegate NvmlReturn WindowsNvmlGetPowerUsageDelegate(NvmlDevice device, out int power);
-
-        private delegate NvmlReturn WindowsNvmlDeviceGetPcieThroughputDelegate(NvmlDevice device, NvmlPcieUtilCounter counter, out uint value);
-
-        internal enum NvmlPcieUtilCounter
+        public enum NvmlPcieUtilCounter
         {
             TxBytes = 0,
             RxBytes = 1
         }
 
-        [StructLayout(LayoutKind.Sequential)]
-        internal struct NvmlDevice
-        {
-            public IntPtr Handle;
-        }
-
-        internal enum NvmlReturn
+        public enum NvmlReturn
         {
             /// <summary>
             /// The operation was successful
@@ -396,9 +130,317 @@ namespace LibreHardwareMonitor.Interop
             InUse = 19,
 
             /// <summary>
-            /// An internal driver error occurred
+            /// An public driver error occurred
             /// </summary>
             Unknown = 999
         }
+
+        public static bool IsAvailable { get; private set; }
+
+        public static bool Initialize()
+        {
+            lock (_syncRoot)
+            {
+                if (IsAvailable)
+                {
+                    return true;
+                }
+
+                if (Software.OperatingSystem.IsUnix)
+                {
+                    try
+                    {
+                        IsAvailable = nvmlInit() == NvmlReturn.Success;
+                    }
+                    catch (DllNotFoundException)
+                    { }
+                    catch (EntryPointNotFoundException)
+                    {
+                        try
+                        {
+                            IsAvailable = nvmlInitLegacy() == NvmlReturn.Success;
+                        }
+                        catch (EntryPointNotFoundException)
+                        { }
+                    }
+                }
+                else if (IsNvmlCompatibleWindowsVersion())
+                {
+                    // Attempt to load the Nvidia Management Library from the
+                    // windows standard search order for applications. This will
+                    // help installations that either have the library in
+                    // %windir%/system32 or provide their own library
+                    _windowsDll = Kernel32.LoadLibrary(WindowsDllName);
+
+                    // If there is no dll in the path, then attempt to load it
+                    // from program files
+                    if (_windowsDll == IntPtr.Zero)
+                    {
+                        string programFilesDirectory = Environment.ExpandEnvironmentVariables("%ProgramW6432%");
+                        string dllPath = Path.Combine(programFilesDirectory, @"NVIDIA Corporation\NVSMI", WindowsDllName);
+
+                        _windowsDll = Kernel32.LoadLibrary(dllPath);
+                    }
+
+                    IsAvailable = (_windowsDll != IntPtr.Zero) && InitialiseDelegates() && (_windowsNvmlInit() == NvmlReturn.Success);
+                }
+
+                return IsAvailable;
+            }
+        }
+
+        private static bool IsNvmlCompatibleWindowsVersion()
+        {
+            return Software.OperatingSystem.Is64Bit && ((Environment.OSVersion.Version.Major > 6) || (Environment.OSVersion.Version.Major == 6 && Environment.OSVersion.Version.Minor >= 1));
+        }
+
+        private static bool InitialiseDelegates()
+        {
+            IntPtr nvmlInit = Kernel32.GetProcAddress(_windowsDll, "nvmlInit_v2");
+
+            if (nvmlInit != IntPtr.Zero)
+            {
+                _windowsNvmlInit = (WindowsNvmlDelegate)Marshal.GetDelegateForFunctionPointer(nvmlInit, typeof(WindowsNvmlDelegate));
+            }
+            else
+            {
+                nvmlInit = Kernel32.GetProcAddress(_windowsDll, "nvmlInit");
+                if (nvmlInit != IntPtr.Zero)
+                    _windowsNvmlInit = (WindowsNvmlDelegate)Marshal.GetDelegateForFunctionPointer(nvmlInit, typeof(WindowsNvmlDelegate));
+                else
+                    return false;
+            }
+
+            IntPtr nvmlShutdown = Kernel32.GetProcAddress(_windowsDll, "nvmlShutdown");
+            if (nvmlShutdown != IntPtr.Zero)
+                _windowsNvmlShutdown = (WindowsNvmlDelegate)Marshal.GetDelegateForFunctionPointer(nvmlShutdown, typeof(WindowsNvmlDelegate));
+            else
+                return false;
+
+
+            IntPtr nvmlGetHandle = Kernel32.GetProcAddress(_windowsDll, "nvmlDeviceGetHandleByIndex_v2");
+            if (nvmlGetHandle != IntPtr.Zero)
+                _windowsNvmlDeviceGetHandleByIndex = (WindowsNvmlGetHandleDelegate)Marshal.GetDelegateForFunctionPointer(nvmlGetHandle, typeof(WindowsNvmlGetHandleDelegate));
+            else
+            {
+                nvmlGetHandle = Kernel32.GetProcAddress(_windowsDll, "nvmlDeviceGetHandleByIndex");
+                if (nvmlGetHandle != IntPtr.Zero)
+                    _windowsNvmlDeviceGetHandleByIndex = (WindowsNvmlGetHandleDelegate)Marshal.GetDelegateForFunctionPointer(nvmlGetHandle, typeof(WindowsNvmlGetHandleDelegate));
+                else
+                    return false;
+            }
+
+            IntPtr nvmlGetPowerUsage = Kernel32.GetProcAddress(_windowsDll, "nvmlDeviceGetPowerUsage");
+            if (nvmlGetPowerUsage != IntPtr.Zero)
+                _windowsNvmlDeviceGetPowerUsage = (WindowsNvmlGetPowerUsageDelegate)Marshal.GetDelegateForFunctionPointer(nvmlGetPowerUsage, typeof(WindowsNvmlGetPowerUsageDelegate));
+            else
+                return false;
+
+
+            IntPtr nvmlGetPcieThroughput = Kernel32.GetProcAddress(_windowsDll, "nvmlDeviceGetPcieThroughput");
+            if (nvmlGetPcieThroughput != IntPtr.Zero)
+                _windowsNvmlDeviceGetPcieThroughputDelegate = (WindowsNvmlDeviceGetPcieThroughputDelegate)Marshal.GetDelegateForFunctionPointer(nvmlGetPcieThroughput, typeof(WindowsNvmlDeviceGetPcieThroughputDelegate));
+            else
+                return false;
+
+
+            IntPtr nvmlGetHandlePciBus = Kernel32.GetProcAddress(_windowsDll, "nvmlDeviceGetHandleByPciBusId_v2");
+            if (nvmlGetHandlePciBus != IntPtr.Zero)
+                _windowsNvmlDeviceGetHandleByPciBusId = (WindowsNvmlGetHandleByPciBusIdDelegate)Marshal.GetDelegateForFunctionPointer(nvmlGetHandlePciBus, typeof(WindowsNvmlGetHandleByPciBusIdDelegate));
+            else
+                return false;
+            
+            IntPtr nvmlDeviceGetPciInfo = Kernel32.GetProcAddress(_windowsDll, "nvmlDeviceGetPciInfo_v2");
+            if (nvmlDeviceGetPciInfo != IntPtr.Zero)
+                _windowsNvmlDeviceGetPciInfo = (WindowsNvmlDeviceGetPciInfo)Marshal.GetDelegateForFunctionPointer(nvmlDeviceGetPciInfo, typeof(WindowsNvmlDeviceGetPciInfo));
+            else
+                return false;
+
+            return true;
+        }
+
+        public static void Close()
+        {
+            lock (_syncRoot)
+            {
+                if (IsAvailable)
+                {
+                    if (Software.OperatingSystem.IsUnix)
+                    {
+                        nvmlShutdown();
+                    }
+                    else if (_windowsDll != IntPtr.Zero)
+                    {
+                        _windowsNvmlShutdown();
+                        Kernel32.FreeLibrary(_windowsDll);
+                    }
+
+                    IsAvailable = false;
+                }
+            }
+        }
+
+        public static NvmlDevice? NvmlDeviceGetHandleByIndex(int index)
+        {
+            if (IsAvailable)
+            {
+                NvmlDevice nvmlDevice;
+                if (Software.OperatingSystem.IsUnix)
+                {
+                    try
+                    {
+                        if (nvmlDeviceGetHandleByIndex(index, out nvmlDevice) == NvmlReturn.Success)
+                            return nvmlDevice;
+                    }
+                    catch (EntryPointNotFoundException)
+                    {
+                        if (nvmlDeviceGetHandleByIndexLegacy(index, out nvmlDevice) == NvmlReturn.Success)
+                            return nvmlDevice;
+                    }
+                }
+                else if (_windowsNvmlDeviceGetHandleByIndex(index, out nvmlDevice) == NvmlReturn.Success)
+                    return nvmlDevice;
+            }
+
+            return null;
+        }
+
+        public static NvmlDevice? NvmlDeviceGetHandleByPciBusId(string pciBusId)
+        {
+            if (IsAvailable)
+            {
+                NvmlDevice nvmlDevice;
+                if (Software.OperatingSystem.IsUnix)
+                {
+                    if (nvmlDeviceGetHandleByPciBusId(pciBusId, out nvmlDevice) == NvmlReturn.Success)
+                        return nvmlDevice;
+                }
+                else if (_windowsNvmlDeviceGetHandleByPciBusId(pciBusId, out nvmlDevice) == NvmlReturn.Success)
+                    return nvmlDevice;
+            }
+
+            return null;
+        }
+
+        public static int? NvmlDeviceGetPowerUsage(NvmlDevice nvmlDevice)
+        {
+            if (IsAvailable)
+            {
+                int powerUsage;
+                if (Software.OperatingSystem.IsUnix)
+                {
+                    if (nvmlDeviceGetPowerUsage(nvmlDevice, out powerUsage) == NvmlReturn.Success)
+                        return powerUsage;
+                }
+                else if (_windowsNvmlDeviceGetPowerUsage(nvmlDevice, out powerUsage) == NvmlReturn.Success)
+                    return powerUsage;
+            }
+
+            return null;
+        }
+
+        public static uint? NvmlDeviceGetPcieThroughput(NvmlDevice nvmlDevice, NvmlPcieUtilCounter counter)
+        {
+            if (IsAvailable)
+            {
+                uint pcieThroughput;
+                if (Software.OperatingSystem.IsUnix)
+                {
+                    if (nvmlDeviceGetPcieThroughput(nvmlDevice, counter, out pcieThroughput) == NvmlReturn.Success)
+                        return pcieThroughput;
+                }
+                else if (_windowsNvmlDeviceGetPcieThroughputDelegate(nvmlDevice, counter, out pcieThroughput) == NvmlReturn.Success)
+                    return pcieThroughput;
+            }
+
+            return null;
+        }
+
+        public static NvmlPciInfo? NvmlDeviceGetPciInfo(NvmlDevice nvmlDevice)
+        {
+            if (IsAvailable)
+            {
+                var pci = new NvmlPciInfo();
+
+                if (Software.OperatingSystem.IsUnix)
+                {
+                    if (nvmlDeviceGetPciInfo(nvmlDevice, ref pci) == NvmlReturn.Success)
+                        return pci;
+                }
+                else if (_windowsNvmlDeviceGetPciInfo(nvmlDevice, ref pci) == NvmlReturn.Success)
+                    return pci;
+            }
+
+            return null;
+        }
+
+        [DllImport(LinuxDllName, EntryPoint = "nvmlInit_v2", ExactSpelling = true)]
+        private static extern NvmlReturn nvmlInit();
+
+        [DllImport(LinuxDllName, EntryPoint = "nvmlInit", ExactSpelling = true)]
+        private static extern NvmlReturn nvmlInitLegacy();
+
+        [DllImport(LinuxDllName, EntryPoint = "nvmlShutdown", ExactSpelling = true)]
+        private static extern NvmlReturn nvmlShutdown();
+
+        [DllImport(LinuxDllName, EntryPoint = "nvmlDeviceGetHandleByIndex_v2", ExactSpelling = true)]
+        private static extern NvmlReturn nvmlDeviceGetHandleByIndex(int index, out NvmlDevice device);
+
+        [DllImport(LinuxDllName, EntryPoint = "nvmlDeviceGetHandleByPciBusId_v2", ExactSpelling = true)]
+        private static extern NvmlReturn nvmlDeviceGetHandleByPciBusId([MarshalAs(UnmanagedType.LPStr)] string pciBusId, out NvmlDevice device);
+
+        [DllImport(LinuxDllName, EntryPoint = "nvmlDeviceGetHandleByIndex", ExactSpelling = true)]
+        private static extern NvmlReturn nvmlDeviceGetHandleByIndexLegacy(int index, out NvmlDevice device);
+
+        [DllImport(LinuxDllName, EntryPoint = "nvmlDeviceGetPowerUsage", ExactSpelling = true)]
+        private static extern NvmlReturn nvmlDeviceGetPowerUsage(NvmlDevice device, out int power);
+
+        [DllImport(LinuxDllName, EntryPoint = "nvmlDeviceGetPcieThroughput", ExactSpelling = true)]
+        private static extern NvmlReturn nvmlDeviceGetPcieThroughput(NvmlDevice device, NvmlPcieUtilCounter counter, out uint value);
+        
+        [DllImport(LinuxDllName, EntryPoint = "nvmlDeviceGetPciInfo_v2")]
+        private static extern NvmlReturn nvmlDeviceGetPciInfo(NvmlDevice device, ref NvmlPciInfo pci);
+
+        private delegate NvmlReturn WindowsNvmlDelegate();
+
+        private delegate NvmlReturn WindowsNvmlGetHandleDelegate(int index, out NvmlDevice device);
+
+        private delegate NvmlReturn WindowsNvmlGetHandleByPciBusIdDelegate([MarshalAs(UnmanagedType.LPStr)] string pciBusId, out NvmlDevice device);
+
+        private delegate NvmlReturn WindowsNvmlGetPowerUsageDelegate(NvmlDevice device, out int power);
+
+        private delegate NvmlReturn WindowsNvmlDeviceGetPcieThroughputDelegate(NvmlDevice device, NvmlPcieUtilCounter counter, out uint value);
+
+        private delegate NvmlReturn WindowsNvmlDeviceGetPciInfo(NvmlDevice device, ref NvmlPciInfo pci);
+
+        [StructLayout(LayoutKind.Sequential)]
+        public struct NvmlDevice
+        {
+            public IntPtr Handle;
+        }
+
+        [StructLayout(LayoutKind.Sequential)]
+        public struct NvmlPciInfo
+        {
+            [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 16)]
+            public string busId;
+
+            public uint domain;
+
+            public uint bus;
+
+            public uint device;
+
+            public ushort pciVendorId;
+
+            public ushort pciDeviceId;
+
+            public uint pciSubSystemId;
+
+            public uint reserved0;
+            public uint reserved1;
+            public uint reserved2;
+            public uint reserved3;
+        }
     }
 }

LibreHardwareMonitorLib/Interop/WinNt.cs

@@ -0,0 +1,37 @@
+// This Source Code Form is subject to the terms of the Mozilla Public License, v. 2.0.
+// If a copy of the MPL was not distributed with this file, You can obtain one at http://mozilla.org/MPL/2.0/.
+// Copyright (C) LibreHardwareMonitor and Contributors.
+// All Rights Reserved.
+
+// ReSharper disable IdentifierTypo
+// ReSharper disable InconsistentNaming
+
+using System.Runtime.InteropServices;
+
+namespace LibreHardwareMonitor.Interop
+{
+    internal static class WinNt
+    {
+        internal const int STATUS_SUCCESS = 0;
+
+        [StructLayout(LayoutKind.Sequential)]
+        internal struct LUID
+        {
+            public readonly uint LowPart;
+            public readonly int HighPart;
+        }
+
+        [StructLayout(LayoutKind.Explicit, Size = 8)]
+        internal struct LARGE_INTEGER
+        {
+            [FieldOffset(0)]
+            public long QuadPart;
+
+            [FieldOffset(0)]
+            public uint LowPart;
+
+            [FieldOffset(4)]
+            public int HighPart;
+        }
+    }
+}