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// Copyright 2019 yuzu Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include <algorithm>
#include <memory>
#include <optional>
#include <vector>
#include "common/assert.h"
#include "video_core/renderer_vulkan/declarations.h"
#include "video_core/renderer_vulkan/vk_device.h"
#include "video_core/renderer_vulkan/vk_memory_manager.h"
#include "video_core/renderer_vulkan/vk_resource_manager.h"
#include "video_core/renderer_vulkan/vk_scheduler.h"
#include "video_core/renderer_vulkan/vk_stream_buffer.h"
namespace Vulkan {
constexpr u64 WATCHES_INITIAL_RESERVE = 0x4000;
constexpr u64 WATCHES_RESERVE_CHUNK = 0x1000;
VKStreamBuffer::VKStreamBuffer(const VKDevice& device, VKMemoryManager& memory_manager,
VKScheduler& scheduler, u64 size, vk::BufferUsageFlags usage,
vk::AccessFlags access, vk::PipelineStageFlags pipeline_stage)
: device{device}, scheduler{scheduler}, buffer_size{size}, access{access}, pipeline_stage{
pipeline_stage} {
CreateBuffers(memory_manager, usage);
ReserveWatches(WATCHES_INITIAL_RESERVE);
}
VKStreamBuffer::~VKStreamBuffer() = default;
std::tuple<u8*, u64, bool> VKStreamBuffer::Reserve(u64 size) {
ASSERT(size <= buffer_size);
mapped_size = size;
if (offset + size > buffer_size) {
// The buffer would overflow, save the amount of used buffers, signal an invalidation and
// reset the state.
invalidation_mark = used_watches;
used_watches = 0;
offset = 0;
}
return {mapped_pointer + offset, offset, invalidation_mark.has_value()};
}
void VKStreamBuffer::Send(u64 size) {
ASSERT_MSG(size <= mapped_size, "Reserved size is too small");
if (invalidation_mark) {
// TODO(Rodrigo): Find a better way to invalidate than waiting for all watches to finish.
scheduler.Flush();
std::for_each(watches.begin(), watches.begin() + *invalidation_mark,
[&](auto& resource) { resource->Wait(); });
invalidation_mark = std::nullopt;
}
if (used_watches + 1 >= watches.size()) {
// Ensure that there are enough watches.
ReserveWatches(WATCHES_RESERVE_CHUNK);
}
// Add a watch for this allocation.
watches[used_watches++]->Watch(scheduler.GetFence());
offset += size;
}
void VKStreamBuffer::CreateBuffers(VKMemoryManager& memory_manager, vk::BufferUsageFlags usage) {
const vk::BufferCreateInfo buffer_ci({}, buffer_size, usage, vk::SharingMode::eExclusive, 0,
nullptr);
const auto dev = device.GetLogical();
const auto& dld = device.GetDispatchLoader();
buffer = dev.createBufferUnique(buffer_ci, nullptr, dld);
commit = memory_manager.Commit(*buffer, true);
mapped_pointer = commit->GetData();
}
void VKStreamBuffer::ReserveWatches(std::size_t grow_size) {
const std::size_t previous_size = watches.size();
watches.resize(previous_size + grow_size);
std::generate(watches.begin() + previous_size, watches.end(),
[]() { return std::make_unique<VKFenceWatch>(); });
}
} // namespace Vulkan
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