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// Copyright 2019 yuzu Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include <cstring>
#include <memory>
#include <optional>
#include <tuple>
#include "common/alignment.h"
#include "common/assert.h"
#include "core/memory.h"
#include "video_core/renderer_vulkan/declarations.h"
#include "video_core/renderer_vulkan/vk_buffer_cache.h"
#include "video_core/renderer_vulkan/vk_scheduler.h"
#include "video_core/renderer_vulkan/vk_stream_buffer.h"
namespace Vulkan {
VKBufferCache::VKBufferCache(Tegra::MemoryManager& tegra_memory_manager,
VideoCore::RasterizerInterface& rasterizer, const VKDevice& device,
VKMemoryManager& memory_manager, VKScheduler& scheduler, u64 size)
: RasterizerCache{rasterizer}, tegra_memory_manager{tegra_memory_manager} {
const auto usage = vk::BufferUsageFlagBits::eVertexBuffer |
vk::BufferUsageFlagBits::eIndexBuffer |
vk::BufferUsageFlagBits::eUniformBuffer;
const auto access = vk::AccessFlagBits::eVertexAttributeRead | vk::AccessFlagBits::eIndexRead |
vk::AccessFlagBits::eUniformRead;
stream_buffer =
std::make_unique<VKStreamBuffer>(device, memory_manager, scheduler, size, usage, access,
vk::PipelineStageFlagBits::eAllCommands);
buffer_handle = stream_buffer->GetBuffer();
}
VKBufferCache::~VKBufferCache() = default;
u64 VKBufferCache::UploadMemory(Tegra::GPUVAddr gpu_addr, std::size_t size, u64 alignment,
bool cache) {
const auto cpu_addr{tegra_memory_manager.GpuToCpuAddress(gpu_addr)};
ASSERT(cpu_addr);
// Cache management is a big overhead, so only cache entries with a given size.
// TODO: Figure out which size is the best for given games.
cache &= size >= 2048;
if (cache) {
if (auto entry = TryGet(*cpu_addr); entry) {
if (entry->size >= size && entry->alignment == alignment) {
return entry->offset;
}
Unregister(entry);
}
}
AlignBuffer(alignment);
const u64 uploaded_offset = buffer_offset;
Memory::ReadBlock(*cpu_addr, buffer_ptr, size);
buffer_ptr += size;
buffer_offset += size;
if (cache) {
auto entry = std::make_shared<CachedBufferEntry>();
entry->offset = uploaded_offset;
entry->size = size;
entry->alignment = alignment;
entry->addr = *cpu_addr;
Register(entry);
}
return uploaded_offset;
}
u64 VKBufferCache::UploadHostMemory(const u8* raw_pointer, std::size_t size, u64 alignment) {
AlignBuffer(alignment);
std::memcpy(buffer_ptr, raw_pointer, size);
const u64 uploaded_offset = buffer_offset;
buffer_ptr += size;
buffer_offset += size;
return uploaded_offset;
}
std::tuple<u8*, u64> VKBufferCache::ReserveMemory(std::size_t size, u64 alignment) {
AlignBuffer(alignment);
u8* const uploaded_ptr = buffer_ptr;
const u64 uploaded_offset = buffer_offset;
buffer_ptr += size;
buffer_offset += size;
return {uploaded_ptr, uploaded_offset};
}
void VKBufferCache::Reserve(std::size_t max_size) {
bool invalidate;
std::tie(buffer_ptr, buffer_offset_base, invalidate) = stream_buffer->Reserve(max_size);
buffer_offset = buffer_offset_base;
if (invalidate) {
InvalidateAll();
}
}
VKExecutionContext VKBufferCache::Send(VKExecutionContext exctx) {
return stream_buffer->Send(exctx, buffer_offset - buffer_offset_base);
}
void VKBufferCache::AlignBuffer(std::size_t alignment) {
// Align the offset, not the mapped pointer
const u64 offset_aligned = Common::AlignUp(buffer_offset, alignment);
buffer_ptr += offset_aligned - buffer_offset;
buffer_offset = offset_aligned;
}
} // namespace Vulkan
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