Merge pull request #2146 from ReinUsesLisp/vulkan-scheduler

vk_scheduler: Implement a scheduler

src/video_core/CMakeLists.txt

@@ -109,7 +109,9 @@ if (ENABLE_VULKAN)
         renderer_vulkan/vk_memory_manager.cpp
         renderer_vulkan/vk_memory_manager.h
         renderer_vulkan/vk_resource_manager.cpp
-        renderer_vulkan/vk_resource_manager.h)
+        renderer_vulkan/vk_resource_manager.h
+        renderer_vulkan/vk_scheduler.cpp
+        renderer_vulkan/vk_scheduler.h)
 
     target_include_directories(video_core PRIVATE ../../externals/Vulkan-Headers/include)
     target_compile_definitions(video_core PRIVATE HAS_VULKAN)

src/video_core/renderer_vulkan/vk_scheduler.cpp

@@ -0,0 +1,60 @@
+// Copyright 2019 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include "common/assert.h"
+#include "common/logging/log.h"
+#include "video_core/renderer_vulkan/declarations.h"
+#include "video_core/renderer_vulkan/vk_device.h"
+#include "video_core/renderer_vulkan/vk_resource_manager.h"
+#include "video_core/renderer_vulkan/vk_scheduler.h"
+
+namespace Vulkan {
+
+VKScheduler::VKScheduler(const VKDevice& device, VKResourceManager& resource_manager)
+    : device{device}, resource_manager{resource_manager} {
+    next_fence = &resource_manager.CommitFence();
+    AllocateNewContext();
+}
+
+VKScheduler::~VKScheduler() = default;
+
+VKExecutionContext VKScheduler::GetExecutionContext() const {
+    return VKExecutionContext(current_fence, current_cmdbuf);
+}
+
+VKExecutionContext VKScheduler::Flush(vk::Semaphore semaphore) {
+    SubmitExecution(semaphore);
+    current_fence->Release();
+    AllocateNewContext();
+    return GetExecutionContext();
+}
+
+VKExecutionContext VKScheduler::Finish(vk::Semaphore semaphore) {
+    SubmitExecution(semaphore);
+    current_fence->Wait();
+    current_fence->Release();
+    AllocateNewContext();
+    return GetExecutionContext();
+}
+
+void VKScheduler::SubmitExecution(vk::Semaphore semaphore) {
+    const auto& dld = device.GetDispatchLoader();
+    current_cmdbuf.end(dld);
+
+    const auto queue = device.GetGraphicsQueue();
+    const vk::SubmitInfo submit_info(0, nullptr, nullptr, 1, &current_cmdbuf, semaphore ? 1u : 0u,
+                                     &semaphore);
+    queue.submit({submit_info}, *current_fence, dld);
+}
+
+void VKScheduler::AllocateNewContext() {
+    current_fence = next_fence;
+    current_cmdbuf = resource_manager.CommitCommandBuffer(*current_fence);
+    next_fence = &resource_manager.CommitFence();
+
+    const auto& dld = device.GetDispatchLoader();
+    current_cmdbuf.begin({vk::CommandBufferUsageFlagBits::eOneTimeSubmit}, dld);
+}
+
+} // namespace Vulkan

src/video_core/renderer_vulkan/vk_scheduler.h

@@ -0,0 +1,69 @@
+// Copyright 2019 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include "common/common_types.h"
+#include "video_core/renderer_vulkan/declarations.h"
+
+namespace Vulkan {
+
+class VKDevice;
+class VKExecutionContext;
+class VKFence;
+class VKResourceManager;
+
+/// The scheduler abstracts command buffer and fence management with an interface that's able to do
+/// OpenGL-like operations on Vulkan command buffers.
+class VKScheduler {
+public:
+    explicit VKScheduler(const VKDevice& device, VKResourceManager& resource_manager);
+    ~VKScheduler();
+
+    /// Gets the current execution context.
+    [[nodiscard]] VKExecutionContext GetExecutionContext() const;
+
+    /// Sends the current execution context to the GPU. It invalidates the current execution context
+    /// and returns a new one.
+    VKExecutionContext Flush(vk::Semaphore semaphore = nullptr);
+
+    /// Sends the current execution context to the GPU and waits for it to complete. It invalidates
+    /// the current execution context and returns a new one.
+    VKExecutionContext Finish(vk::Semaphore semaphore = nullptr);
+
+private:
+    void SubmitExecution(vk::Semaphore semaphore);
+
+    void AllocateNewContext();
+
+    const VKDevice& device;
+    VKResourceManager& resource_manager;
+    vk::CommandBuffer current_cmdbuf;
+    VKFence* current_fence = nullptr;
+    VKFence* next_fence = nullptr;
+};
+
+class VKExecutionContext {
+    friend class VKScheduler;
+
+public:
+    VKExecutionContext() = default;
+
+    VKFence& GetFence() const {
+        return *fence;
+    }
+
+    vk::CommandBuffer GetCommandBuffer() const {
+        return cmdbuf;
+    }
+
+private:
+    explicit VKExecutionContext(VKFence* fence, vk::CommandBuffer cmdbuf)
+        : fence{fence}, cmdbuf{cmdbuf} {}
+
+    VKFence* fence{};
+    vk::CommandBuffer cmdbuf;
+};
+
+} // namespace Vulkan