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// 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/microprofile.h"
#include "core/frontend/scope_acquire_window_context.h"
#include "core/settings.h"
#include "video_core/dma_pusher.h"
#include "video_core/gpu.h"
#include "video_core/gpu_thread.h"
#include "video_core/renderer_base.h"
namespace VideoCommon::GPUThread {
/// Executes a single GPU thread command
static void ExecuteCommand(CommandData* command, VideoCore::RendererBase& renderer,
Tegra::DmaPusher& dma_pusher) {
if (const auto submit_list = std::get_if<SubmitListCommand>(command)) {
dma_pusher.Push(std::move(submit_list->entries));
dma_pusher.DispatchCalls();
} else if (const auto data = std::get_if<SwapBuffersCommand>(command)) {
renderer.SwapBuffers(data->framebuffer);
} else if (const auto data = std::get_if<FlushRegionCommand>(command)) {
renderer.Rasterizer().FlushRegion(data->addr, data->size);
} else if (const auto data = std::get_if<InvalidateRegionCommand>(command)) {
renderer.Rasterizer().InvalidateRegion(data->addr, data->size);
} else if (const auto data = std::get_if<FlushAndInvalidateRegionCommand>(command)) {
renderer.Rasterizer().FlushAndInvalidateRegion(data->addr, data->size);
} else {
UNREACHABLE();
}
}
/// Runs the GPU thread
static void RunThread(VideoCore::RendererBase& renderer, Tegra::DmaPusher& dma_pusher,
SynchState& state) {
MicroProfileOnThreadCreate("GpuThread");
auto WaitForWakeup = [&]() {
std::unique_lock<std::mutex> lock{state.signal_mutex};
state.signal_condition.wait(lock, [&] { return !state.IsIdle() || !state.is_running; });
};
// Wait for first GPU command before acquiring the window context
WaitForWakeup();
// If emulation was stopped during disk shader loading, abort before trying to acquire context
if (!state.is_running) {
return;
}
Core::Frontend::ScopeAcquireWindowContext acquire_context{renderer.GetRenderWindow()};
while (state.is_running) {
if (!state.is_running) {
return;
}
{
// Thread has been woken up, so make the previous write queue the next read queue
std::lock_guard<std::mutex> lock{state.signal_mutex};
std::swap(state.push_queue, state.pop_queue);
}
// Execute all of the GPU commands
while (!state.pop_queue->empty()) {
ExecuteCommand(&state.pop_queue->front(), renderer, dma_pusher);
state.pop_queue->pop();
}
// Signal that the GPU thread has finished processing commands
if (state.IsIdle()) {
state.idle_condition.notify_one();
}
// Wait for CPU thread to send more GPU commands
WaitForWakeup();
}
}
ThreadManager::ThreadManager(VideoCore::RendererBase& renderer, Tegra::DmaPusher& dma_pusher)
: renderer{renderer}, dma_pusher{dma_pusher}, thread{RunThread, std::ref(renderer),
std::ref(dma_pusher), std::ref(state)},
thread_id{thread.get_id()} {}
ThreadManager::~ThreadManager() {
{
// Notify GPU thread that a shutdown is pending
std::lock_guard<std::mutex> lock{state.signal_mutex};
state.is_running = false;
}
state.signal_condition.notify_one();
thread.join();
}
void ThreadManager::SubmitList(Tegra::CommandList&& entries) {
if (entries.empty()) {
return;
}
PushCommand(SubmitListCommand(std::move(entries)), false, false);
}
void ThreadManager::SwapBuffers(
std::optional<std::reference_wrapper<const Tegra::FramebufferConfig>> framebuffer) {
PushCommand(SwapBuffersCommand(std::move(framebuffer)), true, false);
}
void ThreadManager::FlushRegion(VAddr addr, u64 size) {
// Block the CPU when using accurate emulation
PushCommand(FlushRegionCommand(addr, size), Settings::values.use_accurate_gpu_emulation, false);
}
void ThreadManager::InvalidateRegion(VAddr addr, u64 size) {
PushCommand(InvalidateRegionCommand(addr, size), true, true);
}
void ThreadManager::FlushAndInvalidateRegion(VAddr addr, u64 size) {
InvalidateRegion(addr, size);
}
void ThreadManager::PushCommand(CommandData&& command_data, bool wait_for_idle, bool allow_on_cpu) {
{
std::lock_guard<std::mutex> lock{state.signal_mutex};
if ((allow_on_cpu && state.IsIdle()) || IsGpuThread()) {
// Execute the command synchronously on the current thread
ExecuteCommand(&command_data, renderer, dma_pusher);
return;
}
// Push the command to the GPU thread
state.push_queue->emplace(command_data);
}
// Signal the GPU thread that commands are pending
state.signal_condition.notify_one();
if (wait_for_idle) {
// Wait for the GPU to be idle (all commands to be executed)
std::unique_lock<std::mutex> lock{state.idle_mutex};
state.idle_condition.wait(lock, [this] { return state.IsIdle(); });
}
}
} // namespace VideoCommon::GPUThread
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