suyu/src/video_core/gpu_thread.h
Lioncash 6d0551196d video_core/gpu: Create threads separately from initialization
Like with CPU emulation, we generally don't want to fire off the threads
immediately after the relevant classes are initialized, we want to do
this after all necessary data is done loading first.

This splits the thread creation into its own interface member function
to allow controlling when these threads in particular get created.
2019-04-11 22:11:40 -04:00

175 lines
5 KiB
C++

// Copyright 2019 yuzu Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#pragma once
#include <atomic>
#include <condition_variable>
#include <mutex>
#include <optional>
#include <thread>
#include <variant>
#include "common/threadsafe_queue.h"
#include "video_core/gpu.h"
namespace Tegra {
struct FramebufferConfig;
class DmaPusher;
} // namespace Tegra
namespace Core {
class System;
namespace Timing {
struct EventType;
} // namespace Timing
} // namespace Core
namespace VideoCommon::GPUThread {
/// Command to signal to the GPU thread that processing has ended
struct EndProcessingCommand final {};
/// Command to signal to the GPU thread that a command list is ready for processing
struct SubmitListCommand final {
explicit SubmitListCommand(Tegra::CommandList&& entries) : entries{std::move(entries)} {}
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(CacheAddr addr, u64 size) : addr{addr}, size{size} {}
CacheAddr addr;
u64 size;
};
/// Command to signal to the GPU thread to invalidate a region
struct InvalidateRegionCommand final {
explicit constexpr InvalidateRegionCommand(CacheAddr addr, u64 size) : addr{addr}, size{size} {}
CacheAddr addr;
u64 size;
};
/// Command to signal to the GPU thread to flush and invalidate a region
struct FlushAndInvalidateRegionCommand final {
explicit constexpr FlushAndInvalidateRegionCommand(CacheAddr addr, u64 size)
: addr{addr}, size{size} {}
CacheAddr addr;
u64 size;
};
using CommandData =
std::variant<EndProcessingCommand, SubmitListCommand, SwapBuffersCommand, FlushRegionCommand,
InvalidateRegionCommand, FlushAndInvalidateRegionCommand>;
struct CommandDataContainer {
CommandDataContainer() = default;
CommandDataContainer(CommandData&& data, u64 next_fence)
: data{std::move(data)}, fence{next_fence} {}
CommandDataContainer& operator=(const CommandDataContainer& t) {
data = std::move(t.data);
fence = t.fence;
return *this;
}
CommandData data;
u64 fence{};
};
/// Struct used to synchronize the GPU thread
struct SynchState final {
std::atomic_bool is_running{true};
std::atomic_int queued_frame_count{};
std::mutex synchronization_mutex;
std::mutex commands_mutex;
std::condition_variable commands_condition;
std::condition_variable synchronization_condition;
/// Returns true if the gap in GPU commands is small enough that we can consider the CPU and GPU
/// synchronized. This is entirely empirical.
bool IsSynchronized() const {
constexpr std::size_t max_queue_gap{5};
return queue.Size() <= max_queue_gap;
}
void TrySynchronize() {
if (IsSynchronized()) {
std::lock_guard<std::mutex> lock{synchronization_mutex};
synchronization_condition.notify_one();
}
}
void WaitForSynchronization(u64 fence);
void SignalCommands() {
if (queue.Empty()) {
return;
}
commands_condition.notify_one();
}
void WaitForCommands() {
std::unique_lock lock{commands_mutex};
commands_condition.wait(lock, [this] { return !queue.Empty(); });
}
using CommandQueue = Common::SPSCQueue<CommandDataContainer>;
CommandQueue queue;
u64 last_fence{};
std::atomic<u64> signaled_fence{};
};
/// Class used to manage the GPU thread
class ThreadManager final {
public:
explicit ThreadManager(Core::System& system);
~ThreadManager();
/// Creates and starts the GPU thread.
void StartThread(VideoCore::RendererBase& renderer, Tegra::DmaPusher& dma_pusher);
/// Push GPU command entries to be processed
void SubmitList(Tegra::CommandList&& entries);
/// Swap buffers (render frame)
void SwapBuffers(
std::optional<std::reference_wrapper<const Tegra::FramebufferConfig>> framebuffer);
/// Notify rasterizer that any caches of the specified region should be flushed to Switch memory
void FlushRegion(CacheAddr addr, u64 size);
/// Notify rasterizer that any caches of the specified region should be invalidated
void InvalidateRegion(CacheAddr addr, u64 size);
/// Notify rasterizer that any caches of the specified region should be flushed and invalidated
void FlushAndInvalidateRegion(CacheAddr addr, u64 size);
private:
/// Pushes a command to be executed by the GPU thread
u64 PushCommand(CommandData&& command_data);
private:
SynchState state;
Core::System& system;
Core::Timing::EventType* synchronization_event{};
std::thread thread;
std::thread::id thread_id;
};
} // namespace VideoCommon::GPUThread