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[dxgi] Under-report iGPU memory if dGPUs are present

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Should help games pick the correct GPU on setups with integrated graphics.
This commit is contained in:
Philip Rebohle 2024-08-19 19:06:52 +02:00 committed by Philip Rebohle
parent 02d8fa593b
commit be45907479
1 changed files with 23 additions and 14 deletions
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37
src/dxgi/dxgi_adapter.cpp
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@ -326,38 +326,47 @@ namespace dxvk {
sizeof(pDesc->Description) / sizeof(pDesc->Description[0]) - 1,
description.c_str(), description.size());
// Get amount of video memory
// based on the Vulkan heaps
// Get amount of video memory based on the Vulkan heaps
VkDeviceSize deviceMemory = 0;
VkDeviceSize sharedMemory = 0;
for (uint32_t i = 0; i < memoryProp.memoryHeapCount; i++) {
VkMemoryHeap heap = memoryProp.memoryHeaps[i];
if (heap.flags & VK_MEMORY_HEAP_DEVICE_LOCAL_BIT)
deviceMemory += heap.size;
else
if (heap.flags & VK_MEMORY_HEAP_DEVICE_LOCAL_BIT) {
// In general we'll have one large device-local heap, and an additional
// smaller heap on dGPUs in case ReBAR is not supported. Assume that
// the largest available heap is the total amount of available VRAM.
deviceMemory = std::max(heap.size, deviceMemory);
} else {
// This is typically plain sysmem, don't care too much about limits here
sharedMemory += heap.size;
}
}
// Some games think we are on Intel given a lack of
// NVAPI or AGS/atiadlxx support.
// Report our device memory as shared memory,
// and some small amount for the carveout.
if (options->emulateUMA && !m_adapter->isUnifiedMemoryArchitecture()) {
// This can happen on integrated GPUs with one memory heap, over-report
// here since some games may be allergic to reporting no shared memory.
if (!sharedMemory)
sharedMemory = deviceMemory;
deviceMemory = 128 * (1 << 20);
// Some games will default to the GPU with the highest amount of dedicated memory,
// which can be an integrated GPU on some systems. Report available memory as shared
// memory and a small amount as dedicated carve-out if a dedicated GPU is present,
// otherwise report memory normally to not unnecessarily confuse games on Deck.
if ((m_adapter->isLinkedToDGPU() && deviceProp.deviceType == VK_PHYSICAL_DEVICE_TYPE_INTEGRATED_GPU) || options->emulateUMA) {
sharedMemory = std::max(sharedMemory, deviceMemory);
deviceMemory = 512ull << 20;
}
// Some games are silly and need their memory limited
if (options->maxDeviceMemory > 0
&& options->maxDeviceMemory < deviceMemory)
deviceMemory = options->maxDeviceMemory;
if (options->maxSharedMemory > 0
&& options->maxSharedMemory < sharedMemory)
sharedMemory = options->maxSharedMemory;
if (env::is32BitHostPlatform()) {
// The value returned by DXGI is a 32-bit value
// on 32-bit platforms, so we need to clamp it