Add AGS lib to D3D11 for efficient UAV writes overlaps on AMD GPUs

Source/Engine/GraphicsDevice/DirectX/DX11/GPUContextDX11.cpp

@@ -18,6 +18,10 @@
 #include <ThirdParty/nvapi/nvapi.h>
 extern bool EnableNvapi;
 #endif
+#if COMPILE_WITH_AGS
+#include <ThirdParty/AGS/amd_ags.h>
+extern AGSContext* AgsContext;
+#endif
 
 #define DX11_CLEAR_SR_ON_STAGE_DISABLE 0
 
@@ -920,7 +924,16 @@ void GPUContextDX11::OverlapUA(bool end)
         return;
     }
 #endif
-    // TODO: add support for AMD extensions to overlap UAV writes (agsDriverExtensionsDX11_BeginUAVOverlap/agsDriverExtensionsDX11_EndUAVOverlap)
+#if COMPILE_WITH_AGS
+    if (AgsContext)
+    {
+        if (end)
+            agsDriverExtensionsDX11_EndUAVOverlap(AgsContext, _context);
+        else
+            agsDriverExtensionsDX11_BeginUAVOverlap(AgsContext, _context);
+        return;
+    }
+#endif
     // TODO: add support for Intel extensions to overlap UAV writes (INTC_D3D11_BeginUAVOverlap/INTC_D3D11_EndUAVOverlap)
 }
 

Source/Engine/GraphicsDevice/DirectX/DX11/GPUDeviceDX11.cpp

@@ -24,6 +24,10 @@
 #include <ThirdParty/nvapi/nvapi.h>
 bool EnableNvapi = false;
 #endif
+#if COMPILE_WITH_AGS
+#include <ThirdParty/AGS/amd_ags.h>
+AGSContext* AgsContext = nullptr;
+#endif
 #if !USE_EDITOR && PLATFORM_WINDOWS
 #include "Engine/Core/Config/PlatformSettings.h"
 #endif
@@ -436,7 +440,7 @@ bool GPUDeviceDX11::Init()
             NvAPI_ShortString buildBranch("");
             if (NvAPI_SYS_GetDriverAndBranchVersion(&driverVersion, buildBranch) == NVAPI_OK)
             {
-                LOG(Info, "NvApi driver version: {}, {}", driverVersion, StringAsUTF16<>(buildBranch).Get());
+                LOG(Info, "NvApi driver version: {}, {}", driverVersion, TO_UTF16(buildBranch));
             }
         }
         else
@@ -447,6 +451,44 @@ bool GPUDeviceDX11::Init()
         }
     }
 #endif
+#if COMPILE_WITH_AGS
+    if (_adapter->IsAMD())
+    {
+        AGSGPUInfo gpuInfo = {};
+        AGSConfiguration config = {};
+        AGSReturnCode returnCode = agsInitialize(AGS_CURRENT_VERSION, &config, &AgsContext, &gpuInfo);
+        if (returnCode == AGS_SUCCESS)
+        {
+            LOG(Info, "AMD driver version: {}, Radeon Software Version {}", TO_UTF16(gpuInfo.driverVersion), TO_UTF16(gpuInfo.radeonSoftwareVersion));
+            for (int32 i = 0; i < gpuInfo.numDevices; i++)
+            {
+                AGSDeviceInfo& deviceInfo = gpuInfo.devices[i];
+                const Char* asicFamily[] =
+                {
+                    TEXT("Unknown"),
+                    TEXT("Pre GCN"),
+                    TEXT("GCN Gen1"),
+                    TEXT("GCN Gen2"),
+                    TEXT("GCN Gen3"),
+                    TEXT("GCN Gen4"),
+                    TEXT("Vega"),
+                    TEXT("RDNA"),
+                    TEXT("RDNA2"),
+                    TEXT("RDNA3"),
+                    TEXT("RDNA4"),
+                };
+                LOG(Info, " > GPU {}: {} ({})", i, TO_UTF16(deviceInfo.adapterString), asicFamily[deviceInfo.asicFamily <= AGSAsicFamily_RDNA4 ? deviceInfo.asicFamily : 0]);
+                LOG(Info, "   CUs: {}, WGPs: {}, ROPs: {}", deviceInfo.numCUs, deviceInfo.numWGPs, deviceInfo.numROPs);
+                LOG(Info, "   Core clock: {} MHz, Memory clock: {} MHz, {:.2f} Tflops", deviceInfo.coreClock, deviceInfo.memoryClock, deviceInfo.teraFlops);
+                LOG(Info, "   Local memory: {} MB ({:.2f} GB/s), Shared memory: {} MB", (int32)(deviceInfo.localMemoryInBytes / (1024ull * 1024ull)), (float)deviceInfo.memoryBandwidth / 1024.0f, (int32)(deviceInfo.sharedMemoryInBytes / (1024ull * 1024ull)));
+            }
+        }
+        else
+        {
+            LOG(Warning, "agsInitialize failed with result {} ({})", (int32)returnCode);
+        }
+    }
+#endif
 
     // Get DXGI adapter
     ComPtr<IDXGIAdapter> adapter;

Source/Engine/GraphicsDevice/DirectX/DX11/GraphicsDeviceDX11.Build.cs

@@ -16,5 +16,7 @@ public class GraphicsDeviceDX11 : GraphicsDeviceBaseModule
         options.OutputFiles.Add("d3d11.lib");
         if (nvapi.Use(options))
             options.PrivateDependencies.Add("nvapi");
+        if (AGS.Use(options))
+            options.PrivateDependencies.Add("AGS");
     }
 }

Source/Engine/Utilities/StringConverter.h

@@ -133,6 +133,8 @@ public:
     }
 };
 
+#define TO_UTF16(str) StringAsUTF16<>(str).Get()
+
 template<typename CharType = Char>
 class StringAsTerminated
 {