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// SPDX-FileCopyrightText: Copyright 2020 yuzu Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later
#pragma once
#include <algorithm>
#include <cstring>
#include <deque>
#include <functional>
#include <memory>
#include <queue>
#include "common/common_types.h"
#include "video_core/delayed_destruction_ring.h"
#include "video_core/gpu.h"
#include "video_core/host1x/host1x.h"
#include "video_core/host1x/syncpoint_manager.h"
#include "video_core/rasterizer_interface.h"
namespace VideoCommon {
class FenceBase {
public:
explicit FenceBase(bool is_stubbed_) : is_stubbed{is_stubbed_} {}
protected:
bool is_stubbed;
};
template <typename TFence, typename TTextureCache, typename TTBufferCache, typename TQueryCache>
class FenceManager {
public:
/// Notify the fence manager about a new frame
void TickFrame() {
delayed_destruction_ring.Tick();
}
// Unlike other fences, this one doesn't
void SignalOrdering() {
std::scoped_lock lock{buffer_cache.mutex};
buffer_cache.AccumulateFlushes();
}
void SyncOperation(std::function<void()>&& func) {
uncommitted_operations.emplace_back(std::move(func));
}
void SignalFence(std::function<void()>&& func) {
TryReleasePendingFences();
const bool should_flush = ShouldFlush();
CommitAsyncFlushes();
uncommitted_operations.emplace_back(std::move(func));
CommitOperations();
TFence new_fence = CreateFence(!should_flush);
fences.push(new_fence);
QueueFence(new_fence);
if (should_flush) {
rasterizer.FlushCommands();
}
}
void SignalSyncPoint(u32 value) {
syncpoint_manager.IncrementGuest(value);
std::function<void()> func([this, value] { syncpoint_manager.IncrementHost(value); });
SignalFence(std::move(func));
}
void WaitPendingFences() {
while (!fences.empty()) {
TFence& current_fence = fences.front();
if (ShouldWait()) {
WaitFence(current_fence);
}
PopAsyncFlushes();
auto operations = std::move(pending_operations.front());
pending_operations.pop_front();
for (auto& operation : operations) {
operation();
}
PopFence();
}
}
protected:
explicit FenceManager(VideoCore::RasterizerInterface& rasterizer_, Tegra::GPU& gpu_,
TTextureCache& texture_cache_, TTBufferCache& buffer_cache_,
TQueryCache& query_cache_)
: rasterizer{rasterizer_}, gpu{gpu_}, syncpoint_manager{gpu.Host1x().GetSyncpointManager()},
texture_cache{texture_cache_}, buffer_cache{buffer_cache_}, query_cache{query_cache_} {}
virtual ~FenceManager() = default;
/// Creates a Fence Interface, does not create a backend fence if 'is_stubbed' is
/// true
virtual TFence CreateFence(bool is_stubbed) = 0;
/// Queues a fence into the backend if the fence isn't stubbed.
virtual void QueueFence(TFence& fence) = 0;
/// Notifies that the backend fence has been signaled/reached in host GPU.
virtual bool IsFenceSignaled(TFence& fence) const = 0;
/// Waits until a fence has been signalled by the host GPU.
virtual void WaitFence(TFence& fence) = 0;
VideoCore::RasterizerInterface& rasterizer;
Tegra::GPU& gpu;
Tegra::Host1x::SyncpointManager& syncpoint_manager;
TTextureCache& texture_cache;
TTBufferCache& buffer_cache;
TQueryCache& query_cache;
private:
void TryReleasePendingFences() {
while (!fences.empty()) {
TFence& current_fence = fences.front();
if (ShouldWait() && !IsFenceSignaled(current_fence)) {
return;
}
PopAsyncFlushes();
auto operations = std::move(pending_operations.front());
pending_operations.pop_front();
for (auto& operation : operations) {
operation();
}
PopFence();
}
}
bool ShouldWait() const {
std::scoped_lock lock{buffer_cache.mutex, texture_cache.mutex};
return texture_cache.ShouldWaitAsyncFlushes() || buffer_cache.ShouldWaitAsyncFlushes() ||
query_cache.ShouldWaitAsyncFlushes();
}
bool ShouldFlush() const {
std::scoped_lock lock{buffer_cache.mutex, texture_cache.mutex};
return texture_cache.HasUncommittedFlushes() || buffer_cache.HasUncommittedFlushes() ||
query_cache.HasUncommittedFlushes();
}
void PopAsyncFlushes() {
{
std::scoped_lock lock{buffer_cache.mutex, texture_cache.mutex};
texture_cache.PopAsyncFlushes();
buffer_cache.PopAsyncFlushes();
}
query_cache.PopAsyncFlushes();
}
void CommitAsyncFlushes() {
{
std::scoped_lock lock{buffer_cache.mutex, texture_cache.mutex};
texture_cache.CommitAsyncFlushes();
buffer_cache.CommitAsyncFlushes();
}
query_cache.CommitAsyncFlushes();
}
void PopFence() {
delayed_destruction_ring.Push(std::move(fences.front()));
fences.pop();
}
void CommitOperations() {
pending_operations.emplace_back(std::move(uncommitted_operations));
}
std::queue<TFence> fences;
std::deque<std::function<void()>> uncommitted_operations;
std::deque<std::deque<std::function<void()>>> pending_operations;
DelayedDestructionRing<TFence, 6> delayed_destruction_ring;
};
} // namespace VideoCommon
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