GPU Vulkan: Fix recursive Submit calls causing defrag to fail (#12718)

---------

Co-authored-by: Sam Lantinga <slouken@libsdl.org>

src/gpu/vulkan/SDL_gpu_vulkan.c

@@ -1195,7 +1195,7 @@ struct VulkanRenderer
 
 // Forward declarations
 
-static bool VULKAN_INTERNAL_DefragmentMemory(VulkanRenderer *renderer);
+static bool VULKAN_INTERNAL_DefragmentMemory(VulkanRenderer *renderer, VulkanCommandBuffer *commandBuffer);
 static bool VULKAN_INTERNAL_BeginCommandBuffer(VulkanRenderer *renderer, VulkanCommandBuffer *commandBuffer);
 static void VULKAN_ReleaseWindow(SDL_GPURenderer *driverData, SDL_Window *window);
 static bool VULKAN_Wait(SDL_GPURenderer *driverData);
@@ -5578,6 +5578,7 @@ static void VULKAN_PopDebugGroup(
 
 static VulkanTexture *VULKAN_INTERNAL_CreateTexture(
     VulkanRenderer *renderer,
+    bool transitionToDefaultLayout,
     const SDL_GPUTextureCreateInfo *createinfo)
 {
     VkResult vulkanResult;
@@ -5805,6 +5806,7 @@ static VulkanTexture *VULKAN_INTERNAL_CreateTexture(
             &nameInfo);
     }
 
+    if (transitionToDefaultLayout) {
         // Let's transition to the default barrier state, because for some reason Vulkan doesn't let us do that with initialLayout.
         VulkanCommandBuffer *barrierCommandBuffer = (VulkanCommandBuffer *)VULKAN_AcquireCommandBuffer((SDL_GPURenderer *)renderer);
         VULKAN_INTERNAL_TextureTransitionToDefaultUsage(
@@ -5814,6 +5816,7 @@ static VulkanTexture *VULKAN_INTERNAL_CreateTexture(
             texture);
         VULKAN_INTERNAL_TrackTexture(barrierCommandBuffer, texture);
         VULKAN_Submit((SDL_GPUCommandBuffer *)barrierCommandBuffer);
+    }
 
     return texture;
 }
@@ -5863,6 +5866,7 @@ static void VULKAN_INTERNAL_CycleActiveBuffer(
 
 static void VULKAN_INTERNAL_CycleActiveTexture(
     VulkanRenderer *renderer,
+    VulkanCommandBuffer *commandBuffer,
     VulkanTextureContainer *container)
 {
     VulkanTexture *texture;
@@ -5880,8 +5884,15 @@ static void VULKAN_INTERNAL_CycleActiveTexture(
     // No texture is available, generate a new one.
     texture = VULKAN_INTERNAL_CreateTexture(
         renderer,
+        false,
         &container->header.info);
 
+    VULKAN_INTERNAL_TextureTransitionToDefaultUsage(
+        renderer,
+        commandBuffer,
+        VULKAN_TEXTURE_USAGE_MODE_UNINITIALIZED,
+        texture);
+
     if (!texture) {
         return;
     }
@@ -5945,6 +5956,7 @@ static VulkanTextureSubresource *VULKAN_INTERNAL_PrepareTextureSubresourceForWri
         SDL_GetAtomicInt(&textureContainer->activeTexture->referenceCount) > 0) {
         VULKAN_INTERNAL_CycleActiveTexture(
             renderer,
+            commandBuffer,
             textureContainer);
 
         textureSubresource = VULKAN_INTERNAL_FetchTextureSubresource(
@@ -6726,6 +6738,7 @@ static SDL_GPUTexture *VULKAN_CreateTexture(
 
     texture = VULKAN_INTERNAL_CreateTexture(
         renderer,
+        true,
         createinfo);
 
     if (texture == NULL) {
@@ -6900,7 +6913,7 @@ static void VULKAN_INTERNAL_ReleaseBuffer(
     renderer->buffersToDestroy[renderer->buffersToDestroyCount] = vulkanBuffer;
     renderer->buffersToDestroyCount += 1;
 
-    vulkanBuffer->markedForDestroy = 1;
+    vulkanBuffer->markedForDestroy = true;
     vulkanBuffer->container = NULL;
 
     SDL_UnlockMutex(renderer->disposeLock);
@@ -10417,7 +10430,7 @@ static bool VULKAN_Submit(
     Uint32 swapchainImageIndex;
     VulkanTextureSubresource *swapchainTextureSubresource;
     VulkanMemorySubAllocator *allocator;
-    bool presenting = false;
+    bool presenting = (vulkanCommandBuffer->presentDataCount > 0);
 
     SDL_LockMutex(renderer->submitLock);
 
@@ -10440,6 +10453,15 @@ static bool VULKAN_Submit(
             swapchainTextureSubresource);
     }
 
+    if (presenting &&
+        renderer->allocationsToDefragCount > 0 &&
+        !renderer->defragInProgress) {
+        if (!VULKAN_INTERNAL_DefragmentMemory(renderer, vulkanCommandBuffer))
+        {
+            SDL_LogError(SDL_LOG_CATEGORY_GPU, "%s", "Failed to defragment memory, likely OOM!");
+        }
+    }
+
     if (!VULKAN_INTERNAL_EndCommandBuffer(renderer, vulkanCommandBuffer)) {
         SDL_UnlockMutex(renderer->submitLock);
         return false;
@@ -10477,11 +10499,7 @@ static bool VULKAN_Submit(
     }
 
     // Present, if applicable
-    bool result = true;
-
     for (Uint32 j = 0; j < vulkanCommandBuffer->presentDataCount; j += 1) {
-        presenting = true;
-
         presentData = &vulkanCommandBuffer->presentDatas[j];
 
         presentInfo.sType = VK_STRUCTURE_TYPE_PRESENT_INFO_KHR;
@@ -10519,8 +10537,8 @@ static bool VULKAN_Submit(
             (presentData->windowData->frameCounter + 1) % renderer->allowedFramesInFlight;
     }
 
-    // Check if we can perform any cleanups
+    // If presenting, check if we can perform any cleanups
-
+    if (presenting) {
         for (Sint32 i = renderer->submittedCommandBufferCount - 1; i >= 0; i -= 1) {
             vulkanResult = renderer->vkGetFenceStatus(
                 renderer->logicalDevice,
@@ -10555,24 +10573,15 @@ static bool VULKAN_Submit(
             SDL_UnlockMutex(renderer->allocatorLock);
         }
 
-    // Check pending destroys
         VULKAN_INTERNAL_PerformPendingDestroys(renderer);
-
-    // Defrag!
-    if (
-        presenting &&
-        renderer->allocationsToDefragCount > 0 &&
-        !renderer->defragInProgress) {
-        result = VULKAN_INTERNAL_DefragmentMemory(renderer);
     }
 
     // Mark command buffer as submitted
-    // This must happen after defrag, because it will try to acquire new command buffers.
     VULKAN_INTERNAL_ReleaseCommandBuffer(vulkanCommandBuffer);
 
     SDL_UnlockMutex(renderer->submitLock);
 
-    return result;
+    return true;
 }
 
 static bool VULKAN_Cancel(
@@ -10599,43 +10608,28 @@ static bool VULKAN_Cancel(
 }
 
 static bool VULKAN_INTERNAL_DefragmentMemory(
-    VulkanRenderer *renderer)
+    VulkanRenderer *renderer,
+    VulkanCommandBuffer *commandBuffer)
 {
-    VulkanMemoryAllocation *allocation;
-    VulkanMemoryUsedRegion *currentRegion;
-    VulkanBuffer *newBuffer;
-    VulkanTexture *newTexture;
-    VkBufferCopy bufferCopy;
-    VkImageCopy imageCopy;
-    VulkanCommandBuffer *commandBuffer;
-    VulkanTextureSubresource *srcSubresource;
-    VulkanTextureSubresource *dstSubresource;
-    Uint32 i, subresourceIndex;
-
     renderer->defragInProgress = 1;
-
-    commandBuffer = (VulkanCommandBuffer *)VULKAN_AcquireCommandBuffer((SDL_GPURenderer *)renderer);
-    if (commandBuffer == NULL) {
-        return false;
-    }
     commandBuffer->isDefrag = 1;
 
     SDL_LockMutex(renderer->allocatorLock);
 
-    allocation = renderer->allocationsToDefrag[renderer->allocationsToDefragCount - 1];
+    VulkanMemoryAllocation *allocation = renderer->allocationsToDefrag[renderer->allocationsToDefragCount - 1];
     renderer->allocationsToDefragCount -= 1;
 
     /* For each used region in the allocation
      * create a new resource, copy the data
      * and re-point the resource containers
      */
-    for (i = 0; i < allocation->usedRegionCount; i += 1) {
+    for (Uint32 i = 0; i < allocation->usedRegionCount; i += 1) {
-        currentRegion = allocation->usedRegions[i];
+        VulkanMemoryUsedRegion *currentRegion = allocation->usedRegions[i];
 
         if (currentRegion->isBuffer && !currentRegion->vulkanBuffer->markedForDestroy) {
             currentRegion->vulkanBuffer->usage |= VK_BUFFER_USAGE_TRANSFER_DST_BIT;
 
-            newBuffer = VULKAN_INTERNAL_CreateBuffer(
+            VulkanBuffer *newBuffer = VULKAN_INTERNAL_CreateBuffer(
                 renderer,
                 currentRegion->vulkanBuffer->size,
                 currentRegion->vulkanBuffer->usage,
@@ -10645,6 +10639,7 @@ static bool VULKAN_INTERNAL_DefragmentMemory(
 
             if (newBuffer == NULL) {
                 SDL_UnlockMutex(renderer->allocatorLock);
+                SDL_LogError(SDL_LOG_CATEGORY_GPU, "%s", "Failed to allocate defrag buffer!");
                 return false;
             }
 
@@ -10663,6 +10658,7 @@ static bool VULKAN_INTERNAL_DefragmentMemory(
                     VULKAN_BUFFER_USAGE_MODE_COPY_DESTINATION,
                     newBuffer);
 
+                VkBufferCopy bufferCopy;
                 bufferCopy.srcOffset = 0;
                 bufferCopy.dstOffset = 0;
                 bufferCopy.size = currentRegion->resourceSize;
@@ -10702,20 +10698,22 @@ static bool VULKAN_INTERNAL_DefragmentMemory(
 
             VULKAN_INTERNAL_ReleaseBuffer(renderer, currentRegion->vulkanBuffer);
         } else if (!currentRegion->isBuffer && !currentRegion->vulkanTexture->markedForDestroy) {
-            newTexture = VULKAN_INTERNAL_CreateTexture(
+            VulkanTexture *newTexture = VULKAN_INTERNAL_CreateTexture(
                 renderer,
+                false,
                 &currentRegion->vulkanTexture->container->header.info);
 
             if (newTexture == NULL) {
                 SDL_UnlockMutex(renderer->allocatorLock);
+                SDL_LogError(SDL_LOG_CATEGORY_GPU, "%s", "Failed to allocate defrag buffer!");
                 return false;
             }
 
             SDL_GPUTextureCreateInfo info = currentRegion->vulkanTexture->container->header.info;
-            for (subresourceIndex = 0; subresourceIndex < currentRegion->vulkanTexture->subresourceCount; subresourceIndex += 1) {
+            for (Uint32 subresourceIndex = 0; subresourceIndex < currentRegion->vulkanTexture->subresourceCount; subresourceIndex += 1) {
                 // copy subresource if necessary
-                srcSubresource = &currentRegion->vulkanTexture->subresources[subresourceIndex];
+                VulkanTextureSubresource *srcSubresource = &currentRegion->vulkanTexture->subresources[subresourceIndex];
-                dstSubresource = &newTexture->subresources[subresourceIndex];
+                VulkanTextureSubresource *dstSubresource = &newTexture->subresources[subresourceIndex];
 
                 VULKAN_INTERNAL_TextureSubresourceTransitionFromDefaultUsage(
                     renderer,
@@ -10723,12 +10721,14 @@ static bool VULKAN_INTERNAL_DefragmentMemory(
                     VULKAN_TEXTURE_USAGE_MODE_COPY_SOURCE,
                     srcSubresource);
 
-                VULKAN_INTERNAL_TextureSubresourceTransitionFromDefaultUsage(
+                VULKAN_INTERNAL_TextureSubresourceMemoryBarrier(
                     renderer,
                     commandBuffer,
+                    VULKAN_TEXTURE_USAGE_MODE_UNINITIALIZED,
                     VULKAN_TEXTURE_USAGE_MODE_COPY_DESTINATION,
                     dstSubresource);
 
+                VkImageCopy imageCopy;
                 imageCopy.srcOffset.x = 0;
                 imageCopy.srcOffset.y = 0;
                 imageCopy.srcOffset.z = 0;
@@ -10780,8 +10780,7 @@ static bool VULKAN_INTERNAL_DefragmentMemory(
 
     SDL_UnlockMutex(renderer->allocatorLock);
 
-    return VULKAN_Submit(
+    return true;
-        (SDL_GPUCommandBuffer *)commandBuffer);
 }
 
 // Format Info