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// SPDX-FileCopyrightText: Copyright 2019 yuzu Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later
#pragma once
#include <atomic>
#include <condition_variable>
#include <mutex>
#include <optional>
#include <thread>
#include <variant>
#include "common/bounded_threadsafe_queue.h"
#include "common/polyfill_thread.h"
#include "video_core/framebuffer_config.h"
namespace Tegra {
struct FramebufferConfig;
namespace Control {
class Scheduler;
}
} // namespace Tegra
namespace Core {
namespace Frontend {
class GraphicsContext;
}
class System;
} // namespace Core
namespace VideoCore {
class RasterizerInterface;
class RendererBase;
} // namespace VideoCore
namespace VideoCommon::GPUThread {
/// Command to signal to the GPU thread that a command list is ready for processing
struct SubmitListCommand final {
explicit SubmitListCommand(s32 channel_, Tegra::CommandList&& entries_)
: channel{channel_}, entries{std::move(entries_)} {}
s32 channel;
Tegra::CommandList entries;
};
/// Command to signal to the GPU thread that a swap buffers is pending
struct SwapBuffersCommand final {
explicit SwapBuffersCommand(std::optional<const Tegra::FramebufferConfig> framebuffer_)
: framebuffer{std::move(framebuffer_)} {}
std::optional<Tegra::FramebufferConfig> framebuffer;
};
/// Command to signal to the GPU thread to flush a region
struct FlushRegionCommand final {
explicit constexpr FlushRegionCommand(VAddr addr_, u64 size_) : addr{addr_}, size{size_} {}
VAddr addr;
u64 size;
};
/// Command to signal to the GPU thread to invalidate a region
struct InvalidateRegionCommand final {
explicit constexpr InvalidateRegionCommand(VAddr addr_, u64 size_) : addr{addr_}, size{size_} {}
VAddr addr;
u64 size;
};
/// Command to signal to the GPU thread to flush and invalidate a region
struct FlushAndInvalidateRegionCommand final {
explicit constexpr FlushAndInvalidateRegionCommand(VAddr addr_, u64 size_)
: addr{addr_}, size{size_} {}
VAddr addr;
u64 size;
};
/// Command to make the gpu look into pending requests
struct GPUTickCommand final {};
using CommandData =
std::variant<std::monostate, SubmitListCommand, SwapBuffersCommand, FlushRegionCommand,
InvalidateRegionCommand, FlushAndInvalidateRegionCommand, GPUTickCommand>;
struct CommandDataContainer {
CommandDataContainer() = default;
explicit CommandDataContainer(CommandData&& data_, u64 next_fence_, bool block_)
: data{std::move(data_)}, fence{next_fence_}, block(block_) {}
CommandData data;
u64 fence{};
bool block{};
};
/// Struct used to synchronize the GPU thread
struct SynchState final {
using CommandQueue = Common::MPSCQueue<CommandDataContainer>;
std::mutex write_lock;
CommandQueue queue;
u64 last_fence{};
std::atomic<u64> signaled_fence{};
std::condition_variable_any cv;
};
/// Class used to manage the GPU thread
class ThreadManager final {
public:
explicit ThreadManager(Core::System& system_, bool is_async_);
~ThreadManager();
/// Creates and starts the GPU thread.
void StartThread(VideoCore::RendererBase& renderer, Core::Frontend::GraphicsContext& context,
Tegra::Control::Scheduler& scheduler);
/// Push GPU command entries to be processed
void SubmitList(s32 channel, Tegra::CommandList&& entries);
/// Swap buffers (render frame)
void SwapBuffers(const Tegra::FramebufferConfig* framebuffer);
/// Notify rasterizer that any caches of the specified region should be flushed to Switch memory
void FlushRegion(VAddr addr, u64 size);
/// Notify rasterizer that any caches of the specified region should be invalidated
void InvalidateRegion(VAddr addr, u64 size);
/// Notify rasterizer that any caches of the specified region should be flushed and invalidated
void FlushAndInvalidateRegion(VAddr addr, u64 size);
void TickGPU();
private:
/// Pushes a command to be executed by the GPU thread
u64 PushCommand(CommandData&& command_data, bool block = false);
Core::System& system;
const bool is_async;
VideoCore::RasterizerInterface* rasterizer = nullptr;
SynchState state;
std::jthread thread;
};
} // namespace VideoCommon::GPUThread
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