summaryrefslogtreecommitdiffstats
diff options
context:
space:
mode:
-rw-r--r--src/video_core/CMakeLists.txt1
-rw-r--r--src/video_core/buffer_cache.h300
2 files changed, 301 insertions, 0 deletions
diff --git a/src/video_core/CMakeLists.txt b/src/video_core/CMakeLists.txt
index 7aefd4035..8753383b8 100644
--- a/src/video_core/CMakeLists.txt
+++ b/src/video_core/CMakeLists.txt
@@ -1,4 +1,5 @@
add_library(video_core STATIC
+ buffer_cache.h
dma_pusher.cpp
dma_pusher.h
debug_utils/debug_utils.cpp
diff --git a/src/video_core/buffer_cache.h b/src/video_core/buffer_cache.h
new file mode 100644
index 000000000..eb0ec45c2
--- /dev/null
+++ b/src/video_core/buffer_cache.h
@@ -0,0 +1,300 @@
+// Copyright 2019 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <array>
+#include <memory>
+#include <mutex>
+#include <unordered_map>
+#include <unordered_set>
+#include <utility>
+#include <vector>
+
+#include "common/alignment.h"
+#include "common/common_types.h"
+#include "core/core.h"
+#include "video_core/memory_manager.h"
+#include "video_core/rasterizer_cache.h"
+
+namespace VideoCore {
+class RasterizerInterface;
+}
+
+namespace VideoCommon {
+
+template <typename BufferStorageType>
+class CachedBuffer final : public RasterizerCacheObject {
+public:
+ explicit CachedBuffer(VAddr cpu_addr, u8* host_ptr)
+ : RasterizerCacheObject{host_ptr}, host_ptr{host_ptr}, cpu_addr{cpu_addr} {}
+ ~CachedBuffer() override = default;
+
+ VAddr GetCpuAddr() const override {
+ return cpu_addr;
+ }
+
+ std::size_t GetSizeInBytes() const override {
+ return size;
+ }
+
+ u8* GetWritableHostPtr() const {
+ return host_ptr;
+ }
+
+ std::size_t GetSize() const {
+ return size;
+ }
+
+ std::size_t GetCapacity() const {
+ return capacity;
+ }
+
+ bool IsInternalized() const {
+ return is_internal;
+ }
+
+ const BufferStorageType& GetBuffer() const {
+ return buffer;
+ }
+
+ void SetSize(std::size_t new_size) {
+ size = new_size;
+ }
+
+ void SetInternalState(bool is_internal_) {
+ is_internal = is_internal_;
+ }
+
+ BufferStorageType ExchangeBuffer(BufferStorageType buffer_, std::size_t new_capacity) {
+ capacity = new_capacity;
+ std::swap(buffer, buffer_);
+ return buffer_;
+ }
+
+private:
+ u8* host_ptr{};
+ VAddr cpu_addr{};
+ std::size_t size{};
+ std::size_t capacity{};
+ bool is_internal{};
+ BufferStorageType buffer;
+};
+
+template <typename BufferStorageType, typename BufferType, typename StreamBuffer>
+class BufferCache : public RasterizerCache<std::shared_ptr<CachedBuffer<BufferStorageType>>> {
+public:
+ using Buffer = std::shared_ptr<CachedBuffer<BufferStorageType>>;
+ using BufferInfo = std::pair<const BufferType*, u64>;
+
+ explicit BufferCache(VideoCore::RasterizerInterface& rasterizer, Core::System& system,
+ std::unique_ptr<StreamBuffer> stream_buffer)
+ : RasterizerCache<Buffer>{rasterizer}, system{system},
+ stream_buffer{std::move(stream_buffer)}, stream_buffer_handle{
+ this->stream_buffer->GetHandle()} {}
+ ~BufferCache() = default;
+
+ void Unregister(const Buffer& entry) override {
+ std::lock_guard lock{RasterizerCache<Buffer>::mutex};
+ if (entry->IsInternalized()) {
+ internalized_entries.erase(entry->GetCacheAddr());
+ }
+ ReserveBuffer(entry);
+ RasterizerCache<Buffer>::Unregister(entry);
+ }
+
+ void TickFrame() {
+ marked_for_destruction_index =
+ (marked_for_destruction_index + 1) % marked_for_destruction_ring_buffer.size();
+ MarkedForDestruction().clear();
+ }
+
+ [[nodiscard]] BufferInfo UploadMemory(GPUVAddr gpu_addr, std::size_t size,
+ std::size_t alignment = 4, bool internalize = false,
+ bool is_written = false) {
+ std::lock_guard lock{RasterizerCache<Buffer>::mutex};
+
+ auto& memory_manager = system.GPU().MemoryManager();
+ const auto host_ptr = memory_manager.GetPointer(gpu_addr);
+ if (!host_ptr) {
+ return {GetEmptyBuffer(size), 0};
+ }
+ const auto cache_addr = ToCacheAddr(host_ptr);
+
+ // 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.
+ constexpr std::size_t max_stream_size = 0x800;
+ if (!internalize && size < max_stream_size &&
+ internalized_entries.find(cache_addr) == internalized_entries.end()) {
+ return StreamBufferUpload(host_ptr, size, alignment);
+ }
+
+ auto entry = RasterizerCache<Buffer>::TryGet(cache_addr);
+ if (!entry) {
+ return FixedBufferUpload(gpu_addr, host_ptr, size, internalize, is_written);
+ }
+
+ if (entry->GetSize() < size) {
+ IncreaseBufferSize(entry, size);
+ }
+ if (is_written) {
+ entry->MarkAsModified(true, *this);
+ }
+ return {ToHandle(entry->GetBuffer()), 0};
+ }
+
+ /// Uploads from a host memory. Returns the OpenGL buffer where it's located and its offset.
+ [[nodiscard]] BufferInfo UploadHostMemory(const void* raw_pointer, std::size_t size,
+ std::size_t alignment = 4) {
+ std::lock_guard lock{RasterizerCache<Buffer>::mutex};
+ return StreamBufferUpload(raw_pointer, size, alignment);
+ }
+
+ void Map(std::size_t max_size) {
+ std::tie(buffer_ptr, buffer_offset_base, invalidated) = stream_buffer->Map(max_size, 4);
+ buffer_offset = buffer_offset_base;
+ }
+
+ /// Finishes the upload stream, returns true on bindings invalidation.
+ bool Unmap() {
+ stream_buffer->Unmap(buffer_offset - buffer_offset_base);
+ return std::exchange(invalidated, false);
+ }
+
+protected:
+ void FlushObjectInner(const Buffer& entry) override {
+ DownloadBufferData(entry->GetBuffer(), 0, entry->GetSize(), entry->GetWritableHostPtr());
+ }
+
+ virtual BufferStorageType CreateBuffer(std::size_t size) = 0;
+
+ virtual const BufferType* ToHandle(const BufferStorageType& storage) = 0;
+
+ virtual const BufferType* GetEmptyBuffer(std::size_t size) = 0;
+
+ virtual void UploadBufferData(const BufferStorageType& buffer, std::size_t offset,
+ std::size_t size, const u8* data) = 0;
+
+ virtual void DownloadBufferData(const BufferStorageType& buffer, std::size_t offset,
+ std::size_t size, u8* data) = 0;
+
+ virtual void CopyBufferData(const BufferStorageType& src, const BufferStorageType& dst,
+ std::size_t src_offset, std::size_t dst_offset,
+ std::size_t size) = 0;
+
+private:
+ BufferInfo StreamBufferUpload(const void* raw_pointer, std::size_t size,
+ std::size_t alignment) {
+ AlignBuffer(alignment);
+ const std::size_t uploaded_offset = buffer_offset;
+ std::memcpy(buffer_ptr, raw_pointer, size);
+
+ buffer_ptr += size;
+ buffer_offset += size;
+ return {&stream_buffer_handle, uploaded_offset};
+ }
+
+ BufferInfo FixedBufferUpload(GPUVAddr gpu_addr, u8* host_ptr, std::size_t size,
+ bool internalize, bool is_written) {
+ auto& memory_manager = Core::System::GetInstance().GPU().MemoryManager();
+ const auto cpu_addr = memory_manager.GpuToCpuAddress(gpu_addr);
+ ASSERT(cpu_addr);
+
+ auto entry = GetUncachedBuffer(*cpu_addr, host_ptr);
+ entry->SetSize(size);
+ entry->SetInternalState(internalize);
+ RasterizerCache<Buffer>::Register(entry);
+
+ if (internalize) {
+ internalized_entries.emplace(ToCacheAddr(host_ptr));
+ }
+ if (is_written) {
+ entry->MarkAsModified(true, *this);
+ }
+
+ if (entry->GetCapacity() < size) {
+ MarkedForDestruction().push_back(entry->ExchangeBuffer(CreateBuffer(size), size));
+ }
+
+ UploadBufferData(entry->GetBuffer(), 0, size, host_ptr);
+ return {ToHandle(entry->GetBuffer()), 0};
+ }
+
+ void IncreaseBufferSize(Buffer& entry, std::size_t new_size) {
+ const std::size_t old_size = entry->GetSize();
+ if (entry->GetCapacity() < new_size) {
+ const auto& old_buffer = entry->GetBuffer();
+ auto new_buffer = CreateBuffer(new_size);
+
+ // Copy bits from the old buffer to the new buffer.
+ CopyBufferData(old_buffer, new_buffer, 0, 0, old_size);
+ MarkedForDestruction().push_back(
+ entry->ExchangeBuffer(std::move(new_buffer), new_size));
+
+ // This buffer could have been used
+ invalidated = true;
+ }
+ // Upload the new bits.
+ const std::size_t size_diff = new_size - old_size;
+ UploadBufferData(entry->GetBuffer(), old_size, size_diff, entry->GetHostPtr() + old_size);
+
+ // Update entry's size in the object and in the cache.
+ Unregister(entry);
+
+ entry->SetSize(new_size);
+ RasterizerCache<Buffer>::Register(entry);
+ }
+
+ Buffer GetUncachedBuffer(VAddr cpu_addr, u8* host_ptr) {
+ if (auto entry = TryGetReservedBuffer(host_ptr)) {
+ return entry;
+ }
+ return std::make_shared<Buffer::element_type>(cpu_addr, host_ptr);
+ }
+
+ Buffer TryGetReservedBuffer(u8* host_ptr) {
+ const auto it = buffer_reserve.find(ToCacheAddr(host_ptr));
+ if (it == buffer_reserve.end()) {
+ return {};
+ }
+ auto& reserve = it->second;
+ auto entry = reserve.back();
+ reserve.pop_back();
+ return entry;
+ }
+
+ void ReserveBuffer(Buffer entry) {
+ buffer_reserve[entry->GetCacheAddr()].push_back(std::move(entry));
+ }
+
+ void AlignBuffer(std::size_t alignment) {
+ // Align the offset, not the mapped pointer
+ const std::size_t offset_aligned = Common::AlignUp(buffer_offset, alignment);
+ buffer_ptr += offset_aligned - buffer_offset;
+ buffer_offset = offset_aligned;
+ }
+
+ std::vector<BufferStorageType>& MarkedForDestruction() {
+ return marked_for_destruction_ring_buffer[marked_for_destruction_index];
+ }
+
+ Core::System& system;
+
+ std::unique_ptr<StreamBuffer> stream_buffer;
+ BufferType stream_buffer_handle{};
+
+ bool invalidated = false;
+
+ u8* buffer_ptr = nullptr;
+ u64 buffer_offset = 0;
+ u64 buffer_offset_base = 0;
+
+ std::size_t marked_for_destruction_index = 0;
+ std::array<std::vector<BufferStorageType>, 4> marked_for_destruction_ring_buffer;
+
+ std::unordered_set<CacheAddr> internalized_entries;
+ std::unordered_map<CacheAddr, std::vector<Buffer>> buffer_reserve;
+};
+
+} // namespace VideoCommon