From 1644008a7eb9d5b3534807af16f9c3125d195ab2 Mon Sep 17 00:00:00 2001
From: Jens Peters <jp7677@gmail.com>
Date: Wed, 8 Dec 2021 21:01:15 +0100
Subject: [PATCH] nvapi-d3d: Add NvAPI_D3D_ImplicitSLIControl

---
 src/nvapi_d3d.cpp       |  9 +++++++++
 src/nvapi_interface.cpp |  1 +
 tests/nvapi_d3d.cpp     | 10 +++++++++-
 3 files changed, 19 insertions(+), 1 deletion(-)

diff --git a/src/nvapi_d3d.cpp b/src/nvapi_d3d.cpp
index 58bee635..88c20cc2 100644
--- a/src/nvapi_d3d.cpp
+++ b/src/nvapi_d3d.cpp
@@ -52,6 +52,15 @@ extern "C" {
         return Ok(n, alreadyLoggedOk);
     }
 
+    NvAPI_Status __cdecl NvAPI_D3D_ImplicitSLIControl(IMPLICIT_SLI_CONTROL implicitSLIControl) {
+        constexpr auto n = __func__;
+
+        if (implicitSLIControl == ENABLE_IMPLICIT_SLI)
+            return Error(n); // No SLI with this implementation
+
+        return Ok(n);
+    }
+
     NvAPI_Status __cdecl NvAPI_D3D1x_GetGraphicsCapabilities(IUnknown *pDevice,
                                                     NvU32 structVersion,
                                                     NV_D3D1x_GRAPHICS_CAPS *pGraphicsCaps) {
diff --git a/src/nvapi_interface.cpp b/src/nvapi_interface.cpp
index f90b2f7a..80f6e4ee 100644
--- a/src/nvapi_interface.cpp
+++ b/src/nvapi_interface.cpp
@@ -70,6 +70,7 @@ extern "C" {
         INSERT_AND_RETURN_WHEN_EQUALS(NvAPI_D3D_GetObjectHandleForResource)
         INSERT_AND_RETURN_WHEN_EQUALS(NvAPI_D3D_SetResourceHint)
         INSERT_AND_RETURN_WHEN_EQUALS(NvAPI_D3D_GetCurrentSLIState)
+        INSERT_AND_RETURN_WHEN_EQUALS(NvAPI_D3D_ImplicitSLIControl)
         INSERT_AND_RETURN_WHEN_EQUALS(NvAPI_D3D_BeginResourceRendering)
         INSERT_AND_RETURN_WHEN_EQUALS(NvAPI_D3D_EndResourceRendering)
         INSERT_AND_RETURN_WHEN_EQUALS(NvAPI_GPU_GetGPUType)
diff --git a/tests/nvapi_d3d.cpp b/tests/nvapi_d3d.cpp
index 46f69b6e..f70789ae 100644
--- a/tests/nvapi_d3d.cpp
+++ b/tests/nvapi_d3d.cpp
@@ -13,7 +13,7 @@ TEST_CASE("D3D methods succeed", "[.d3d]") {
         REQUIRE(NvAPI_D3D_SetResourceHint(&unknown, NVDX_ObjectHandle(), NVAPI_D3D_SRH_CATEGORY_SLI, 1, &value) == NVAPI_NO_IMPLEMENTATION);
     }
 
-    SECTION("SetResourceHint returns NoImplementation") {
+    SECTION("SetResourceHint returns no-implementation") {
         REQUIRE(NvAPI_D3D_SetResourceHint(&unknown, NVDX_ObjectHandle(), NVAPI_D3D_SRH_CATEGORY_SLI, 0, nullptr) == NVAPI_NO_IMPLEMENTATION);
     }
 
@@ -38,6 +38,14 @@ TEST_CASE("D3D methods succeed", "[.d3d]") {
         REQUIRE(state.numVRSLIGpus == 0);
     }
 
+    SECTION("ImplicitSLIControl returns OK") {
+        REQUIRE(NvAPI_D3D_ImplicitSLIControl(DISABLE_IMPLICIT_SLI) == NVAPI_OK);
+    }
+
+    SECTION("ImplicitSLIControl returns error when enabling SLI") {
+        REQUIRE(NvAPI_D3D_ImplicitSLIControl(ENABLE_IMPLICIT_SLI) == NVAPI_ERROR);
+    }
+
     SECTION("GetGraphicsCapabilities (V1) returns OK") {
         NV_D3D1x_GRAPHICS_CAPS_V1 caps;
         REQUIRE(NvAPI_D3D1x_GetGraphicsCapabilities(&unknown, NV_D3D1x_GRAPHICS_CAPS_VER1, reinterpret_cast<NV_D3D1x_GRAPHICS_CAPS*>(&caps)) == NVAPI_OK);