1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
|
// 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, VideoCore::RendererBase& renderer,
Tegra::DmaPusher& dma_pusher);
~ThreadManager();
/// 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
|
