renderer_vulkan: add locks to avoid scheduler flushes from CPU

src/video_core/fence_manager.h

@@ -86,7 +86,10 @@ public:
             uncommitted_operations.emplace_back(std::move(func));
         }
         pending_operations.emplace_back(std::move(uncommitted_operations));
+        {
+            std::scoped_lock lock{buffer_cache.mutex, texture_cache.mutex};
             QueueFence(new_fence);
+        }
         if (!delay_fence) {
             func();
         }

src/video_core/renderer_vulkan/renderer_vulkan.cpp

@@ -132,12 +132,16 @@ void RendererVulkan::SwapBuffers(const Tegra::FramebufferConfig* framebuffer) {
     const bool use_accelerated =
         rasterizer.AccelerateDisplay(*framebuffer, framebuffer_addr, framebuffer->stride);
     const bool is_srgb = use_accelerated && screen_info.is_srgb;
+
+    {
+        std::scoped_lock lock{rasterizer.LockCaches()};
         RenderScreenshot(*framebuffer, use_accelerated);
 
         Frame* frame = present_manager.GetRenderFrame();
         blit_screen.DrawToSwapchain(frame, *framebuffer, use_accelerated, is_srgb);
         scheduler.Flush(*frame->render_ready);
         present_manager.Present(frame);
+    }
 
     gpu.RendererFrameEndNotify();
     rasterizer.TickFrame();

src/video_core/renderer_vulkan/vk_rasterizer.cpp

@@ -198,7 +198,7 @@ void RasterizerVulkan::PrepareDraw(bool is_indexed, Func&& draw_func) {
     if (!pipeline) {
         return;
     }
-    std::scoped_lock lock{buffer_cache.mutex, texture_cache.mutex};
+    std::scoped_lock lock{LockCaches()};
     // update engine as channel may be different.
     pipeline->SetEngine(maxwell3d, gpu_memory);
     pipeline->Configure(is_indexed);
@@ -708,6 +708,7 @@ void RasterizerVulkan::TiledCacheBarrier() {
 }
 
 void RasterizerVulkan::FlushCommands() {
+    std::scoped_lock lock{LockCaches()};
     if (draw_counter == 0) {
         return;
     }
@@ -805,6 +806,7 @@ void RasterizerVulkan::FlushWork() {
     if ((++draw_counter & 7) != 7) {
         return;
     }
+    std::scoped_lock lock{LockCaches()};
     if (draw_counter < DRAWS_TO_DISPATCH) {
         // Send recorded tasks to the worker thread
         scheduler.DispatchWork();
@@ -1486,7 +1488,7 @@ void RasterizerVulkan::UpdateVertexInput(Tegra::Engines::Maxwell3D::Regs& regs)
 void RasterizerVulkan::InitializeChannel(Tegra::Control::ChannelState& channel) {
     CreateChannel(channel);
     {
-        std::scoped_lock lock{buffer_cache.mutex, texture_cache.mutex};
+        std::scoped_lock lock{LockCaches()};
         texture_cache.CreateChannel(channel);
         buffer_cache.CreateChannel(channel);
     }
@@ -1499,7 +1501,7 @@ void RasterizerVulkan::BindChannel(Tegra::Control::ChannelState& channel) {
     const s32 channel_id = channel.bind_id;
     BindToChannel(channel_id);
     {
-        std::scoped_lock lock{buffer_cache.mutex, texture_cache.mutex};
+        std::scoped_lock lock{LockCaches()};
         texture_cache.BindToChannel(channel_id);
         buffer_cache.BindToChannel(channel_id);
     }
@@ -1512,7 +1514,7 @@ void RasterizerVulkan::BindChannel(Tegra::Control::ChannelState& channel) {
 void RasterizerVulkan::ReleaseChannel(s32 channel_id) {
     EraseChannel(channel_id);
     {
-        std::scoped_lock lock{buffer_cache.mutex, texture_cache.mutex};
+        std::scoped_lock lock{LockCaches()};
         texture_cache.EraseChannel(channel_id);
         buffer_cache.EraseChannel(channel_id);
     }

src/video_core/renderer_vulkan/vk_rasterizer.h

@@ -133,6 +133,10 @@ public:
 
     void ReleaseChannel(s32 channel_id) override;
 
+    std::scoped_lock<std::recursive_mutex, std::recursive_mutex> LockCaches() {
+        return std::scoped_lock{buffer_cache.mutex, texture_cache.mutex};
+    }
+
 private:
     static constexpr size_t MAX_TEXTURES = 192;
     static constexpr size_t MAX_IMAGES = 48;