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authorFernando Sahmkow <fsahmkow27@gmail.com>2019-07-19 16:50:40 +0200
committerFernandoS27 <fsahmkow27@gmail.com>2019-08-21 18:14:22 +0200
commit862bec001b7ada13ba0e97f95d6ad108ae8a8d0c (patch)
treed366f7768d0acd4cbe1514a57b9fddcfb4c79eaa /src/video_core/buffer_cache
parentMerge pull request #2748 from FernandoS27/align-memory (diff)
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Diffstat (limited to 'src/video_core/buffer_cache')
-rw-r--r--src/video_core/buffer_cache/buffer_block.h78
-rw-r--r--src/video_core/buffer_cache/buffer_cache.h372
-rw-r--r--src/video_core/buffer_cache/map_interval.h48
3 files changed, 498 insertions, 0 deletions
diff --git a/src/video_core/buffer_cache/buffer_block.h b/src/video_core/buffer_cache/buffer_block.h
new file mode 100644
index 000000000..2c739a586
--- /dev/null
+++ b/src/video_core/buffer_cache/buffer_block.h
@@ -0,0 +1,78 @@
+// Copyright 2019 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <unordered_set>
+#include <utility>
+
+#include "common/alignment.h"
+#include "common/common_types.h"
+#include "video_core/gpu.h"
+
+namespace VideoCommon {
+
+class BufferBlock {
+public:
+ bool Overlaps(const CacheAddr start, const CacheAddr end) const {
+ return (cache_addr < end) && (cache_addr_end > start);
+ }
+
+ bool IsInside(const CacheAddr other_start, const CacheAddr other_end) {
+ return (cache_addr <= other_start && other_end <= cache_addr_end);
+ }
+
+ u8* GetWritableHostPtr() const {
+ return FromCacheAddr(cache_addr);
+ }
+
+ u8* GetWritableHostPtr(std::size_t offset) const {
+ return FromCacheAddr(cache_addr + offset);
+ }
+
+ std::size_t GetOffset(const CacheAddr in_addr) {
+ return static_cast<std::size_t>(in_addr - cache_addr);
+ }
+
+ CacheAddr GetCacheAddr() const {
+ return cache_addr;
+ }
+
+ CacheAddr GetCacheAddrEnd() const {
+ return cache_addr_end;
+ }
+
+ void SetCacheAddr(const CacheAddr new_addr) {
+ cache_addr = new_addr;
+ cache_addr_end = new_addr + size;
+ }
+
+ std::size_t GetSize() const {
+ return size;
+ }
+
+ void SetEpoch(u64 new_epoch) {
+ epoch = new_epoch;
+ }
+
+ u64 GetEpoch() {
+ return epoch;
+ }
+
+protected:
+ explicit BufferBlock(CacheAddr cache_addr,const std::size_t size)
+ : size{size} {
+ SetCacheAddr(cache_addr);
+ }
+ ~BufferBlock() = default;
+
+private:
+ CacheAddr cache_addr{};
+ CacheAddr cache_addr_end{};
+ u64 pages{};
+ std::size_t size{};
+ u64 epoch{};
+};
+
+} // namespace VideoCommon
diff --git a/src/video_core/buffer_cache/buffer_cache.h b/src/video_core/buffer_cache/buffer_cache.h
new file mode 100644
index 000000000..6c467eb80
--- /dev/null
+++ b/src/video_core/buffer_cache/buffer_cache.h
@@ -0,0 +1,372 @@
+// 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/buffer_cache/map_interval.h"
+#include "video_core/buffer_cache/buffer_block.h"
+#include "video_core/memory_manager.h"
+
+namespace VideoCore {
+class RasterizerInterface;
+}
+
+namespace VideoCommon {
+
+template <typename TBuffer, typename TBufferType, typename StreamBuffer>
+class BufferCache {
+public:
+ using BufferInfo = std::pair<const TBufferType*, u64>;
+
+ BufferInfo UploadMemory(GPUVAddr gpu_addr, std::size_t size, std::size_t alignment = 4,
+ bool is_written = false) {
+ std::lock_guard lock{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);
+
+ auto block = GetBlock(cache_addr, size);
+ MapAddress(block, gpu_addr, cache_addr, size, is_written);
+
+ const u64 offset = static_cast<u64>(block->GetOffset(cache_addr));
+
+ return {ToHandle(block), offset};
+ }
+
+ /// Uploads from a host memory. Returns the OpenGL buffer where it's located and its offset.
+ BufferInfo UploadHostMemory(const void* raw_pointer, std::size_t size,
+ std::size_t alignment = 4) {
+ std::lock_guard lock{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);
+ }
+
+ void TickFrame() {
+ ++epoch;
+ while (!pending_destruction.empty()) {
+ if (pending_destruction.front()->GetEpoch() + 1 > epoch) {
+ break;
+ }
+ pending_destruction.pop_front();
+ }
+ }
+
+ /// Write any cached resources overlapping the specified region back to memory
+ void FlushRegion(CacheAddr addr, std::size_t size) {
+ std::lock_guard lock{mutex};
+
+ // TODO
+ }
+
+ /// Mark the specified region as being invalidated
+ void InvalidateRegion(CacheAddr addr, u64 size) {
+ std::lock_guard lock{mutex};
+
+ std::vector<MapInterval> objects = GetMapsInRange(addr, size);
+ for (auto& object : objects) {
+ Unregister(object);
+ }
+ }
+
+ virtual const TBufferType* GetEmptyBuffer(std::size_t size) = 0;
+
+protected:
+ explicit BufferCache(VideoCore::RasterizerInterface& rasterizer, Core::System& system,
+ std::unique_ptr<StreamBuffer> stream_buffer)
+ : rasterizer{rasterizer}, system{system}, stream_buffer{std::move(stream_buffer)},
+ stream_buffer_handle{this->stream_buffer->GetHandle()} {}
+
+ ~BufferCache() = default;
+
+ virtual const TBufferType* ToHandle(const TBuffer& storage) = 0;
+
+ virtual void WriteBarrier() = 0;
+
+ virtual TBuffer CreateBlock(CacheAddr cache_addr, std::size_t size) = 0;
+
+ virtual void UploadBlockData(const TBuffer& buffer, std::size_t offset, std::size_t size,
+ const u8* data) = 0;
+
+ virtual void DownloadBlockData(const TBuffer& buffer, std::size_t offset, std::size_t size,
+ u8* data) = 0;
+
+ virtual void CopyBlock(const TBuffer& src, const TBuffer& dst, std::size_t src_offset,
+ std::size_t dst_offset, std::size_t size) = 0;
+
+ /// Register an object into the cache
+ void Register(const MapInterval& new_interval, const GPUVAddr gpu_addr) {
+ const CacheAddr cache_ptr = new_interval.start;
+ const std::size_t size = new_interval.end - new_interval.start;
+ const std::optional<VAddr> cpu_addr =
+ system.GPU().MemoryManager().GpuToCpuAddress(gpu_addr);
+ if (!cache_ptr || !cpu_addr) {
+ LOG_CRITICAL(HW_GPU, "Failed to register buffer with unmapped gpu_address 0x{:016x}",
+ gpu_addr);
+ return;
+ }
+ const IntervalType interval{new_interval.start, new_interval.end};
+ mapped_addresses.insert(interval);
+ map_storage[new_interval] = MapInfo{gpu_addr, *cpu_addr};
+
+ rasterizer.UpdatePagesCachedCount(*cpu_addr, size, 1);
+ }
+
+ /// Unregisters an object from the cache
+ void Unregister(const MapInterval& interval) {
+ const MapInfo info = map_storage[interval];
+ const std::size_t size = interval.end - interval.start;
+ rasterizer.UpdatePagesCachedCount(info.cpu_addr, size, -1);
+ const IntervalType delete_interval{interval.start, interval.end};
+ mapped_addresses.erase(delete_interval);
+ map_storage.erase(interval);
+ }
+
+private:
+ void MapAddress(const TBuffer& block, const GPUVAddr gpu_addr, const CacheAddr cache_addr,
+ const std::size_t size, bool is_written) {
+
+ std::vector<MapInterval> overlaps = GetMapsInRange(cache_addr, size);
+ if (overlaps.empty()) {
+ const CacheAddr cache_addr_end = cache_addr + size;
+ MapInterval new_interval{cache_addr, cache_addr_end};
+ if (!is_written) {
+ u8* host_ptr = FromCacheAddr(cache_addr);
+ UploadBlockData(block, block->GetOffset(cache_addr), size, host_ptr);
+ }
+ Register(new_interval, gpu_addr);
+ return;
+ }
+
+ if (overlaps.size() == 1) {
+ MapInterval current_map = overlaps[0];
+ const CacheAddr cache_addr_end = cache_addr + size;
+ if (current_map.IsInside(cache_addr, cache_addr_end)) {
+ return;
+ }
+ const CacheAddr new_start = std::min(cache_addr, current_map.start);
+ const CacheAddr new_end = std::max(cache_addr_end, current_map.end);
+ const GPUVAddr new_gpu_addr = gpu_addr + new_start - cache_addr;
+ const std::size_t new_size = static_cast<std::size_t>(new_end - new_start);
+ MapInterval new_interval{new_start, new_end};
+ const std::size_t offset = current_map.start - new_start;
+ const std::size_t size = current_map.end - current_map.start;
+ // Upload the remaining data
+ if (!is_written) {
+ u8* host_ptr = FromCacheAddr(new_start);
+ if (new_start == cache_addr && new_end == cache_addr_end) {
+ std::size_t first_size = current_map.start - new_start;
+ if (first_size > 0) {
+ UploadBlockData(block, block->GetOffset(new_start), first_size, host_ptr);
+ }
+
+ std::size_t second_size = new_end - current_map.end;
+ if (second_size > 0) {
+ u8* host_ptr2 = FromCacheAddr(current_map.end);
+ UploadBlockData(block, block->GetOffset(current_map.end), second_size,
+ host_ptr2);
+ }
+ } else {
+ if (new_start == cache_addr) {
+ std::size_t second_size = new_end - current_map.end;
+ if (second_size > 0) {
+ u8* host_ptr2 = FromCacheAddr(current_map.end);
+ UploadBlockData(block, block->GetOffset(current_map.end), second_size,
+ host_ptr2);
+ }
+ } else {
+ std::size_t first_size = current_map.start - new_start;
+ if (first_size > 0) {
+ UploadBlockData(block, block->GetOffset(new_start), first_size, host_ptr);
+ }
+ }
+ }
+ }
+ Unregister(current_map);
+ Register(new_interval, new_gpu_addr);
+ } else {
+ // Calculate new buffer parameters
+ GPUVAddr new_gpu_addr = gpu_addr;
+ CacheAddr start = cache_addr;
+ CacheAddr end = cache_addr + size;
+ for (auto& overlap : overlaps) {
+ start = std::min(overlap.start, start);
+ end = std::max(overlap.end, end);
+ }
+ new_gpu_addr = gpu_addr + start - cache_addr;
+ MapInterval new_interval{start, end};
+ for (auto& overlap : overlaps) {
+ Unregister(overlap);
+ }
+ std::size_t new_size = end - start;
+ if (!is_written) {
+ u8* host_ptr = FromCacheAddr(start);
+ UploadBlockData(block, block->GetOffset(start), new_size, host_ptr);
+ }
+ Register(new_interval, new_gpu_addr);
+ }
+ }
+
+ std::vector<MapInterval> GetMapsInRange(CacheAddr addr, std::size_t size) {
+ if (size == 0) {
+ return {};
+ }
+
+ std::vector<MapInterval> objects{};
+ const IntervalType interval{addr, addr + size};
+ for (auto& pair : boost::make_iterator_range(mapped_addresses.equal_range(interval))) {
+ objects.emplace_back(pair.lower(), pair.upper());
+ }
+
+ return objects;
+ }
+
+ /// Returns a ticks counter used for tracking when cached objects were last modified
+ u64 GetModifiedTicks() {
+ return ++modified_ticks;
+ }
+
+ 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};
+ }
+
+ 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;
+ }
+
+ TBuffer EnlargeBlock(TBuffer buffer) {
+ const std::size_t old_size = buffer->GetSize();
+ const std::size_t new_size = old_size + block_page_size;
+ const CacheAddr cache_addr = buffer->GetCacheAddr();
+ TBuffer new_buffer = CreateBlock(cache_addr, new_size);
+ CopyBlock(buffer, new_buffer, 0, 0, old_size);
+ buffer->SetEpoch(epoch);
+ pending_destruction.push_back(buffer);
+ const CacheAddr cache_addr_end = cache_addr + new_size - 1;
+ u64 page_start = cache_addr >> block_page_bits;
+ const u64 page_end = cache_addr_end >> block_page_bits;
+ while (page_start <= page_end) {
+ blocks[page_start] = new_buffer;
+ ++page_start;
+ }
+ return new_buffer;
+ }
+
+ TBuffer MergeBlocks(TBuffer first, TBuffer second) {
+ const std::size_t size_1 = first->GetSize();
+ const std::size_t size_2 = second->GetSize();
+ const CacheAddr first_addr = first->GetCacheAddr();
+ const CacheAddr second_addr = second->GetCacheAddr();
+ const CacheAddr new_addr = std::min(first_addr, second_addr);
+ const std::size_t new_size = size_1 + size_2;
+ TBuffer new_buffer = CreateBlock(new_addr, new_size);
+ CopyBlock(first, new_buffer, 0, new_buffer->GetOffset(first_addr), size_1);
+ CopyBlock(second, new_buffer, 0, new_buffer->GetOffset(second_addr), size_2);
+ first->SetEpoch(epoch);
+ second->SetEpoch(epoch);
+ pending_destruction.push_back(first);
+ pending_destruction.push_back(second);
+ const CacheAddr cache_addr_end = new_addr + new_size - 1;
+ u64 page_start = new_addr >> block_page_bits;
+ const u64 page_end = cache_addr_end >> block_page_bits;
+ while (page_start <= page_end) {
+ blocks[page_start] = new_buffer;
+ ++page_start;
+ }
+ return new_buffer;
+ }
+
+ TBuffer GetBlock(const CacheAddr cache_addr, const std::size_t size) {
+ TBuffer found{};
+ const CacheAddr cache_addr_end = cache_addr + size - 1;
+ u64 page_start = cache_addr >> block_page_bits;
+ const u64 page_end = cache_addr_end >> block_page_bits;
+ const u64 num_pages = page_end - page_start + 1;
+ while (page_start <= page_end) {
+ auto it = blocks.find(page_start);
+ if (it == blocks.end()) {
+ if (found) {
+ found = EnlargeBlock(found);
+ } else {
+ const CacheAddr start_addr = (page_start << block_page_bits);
+ found = CreateBlock(start_addr, block_page_size);
+ blocks[page_start] = found;
+ }
+ } else {
+ if (found) {
+ if (found == it->second) {
+ ++page_start;
+ continue;
+ }
+ found = MergeBlocks(found, it->second);
+ } else {
+ found = it->second;
+ }
+ }
+ ++page_start;
+ }
+ return found;
+ }
+
+ std::unique_ptr<StreamBuffer> stream_buffer;
+ TBufferType stream_buffer_handle{};
+
+ bool invalidated = false;
+
+ u8* buffer_ptr = nullptr;
+ u64 buffer_offset = 0;
+ u64 buffer_offset_base = 0;
+
+ using IntervalCache = boost::icl::interval_set<CacheAddr>;
+ using IntervalType = typename IntervalCache::interval_type;
+ IntervalCache mapped_addresses{};
+ std::unordered_map<MapInterval, MapInfo> map_storage;
+
+ static constexpr u64 block_page_bits{24};
+ static constexpr u64 block_page_size{1 << block_page_bits};
+ std::unordered_map<u64, TBuffer> blocks;
+
+ std::list<TBuffer> pending_destruction;
+ u64 epoch{};
+ u64 modified_ticks{};
+ VideoCore::RasterizerInterface& rasterizer;
+ Core::System& system;
+ std::recursive_mutex mutex;
+};
+
+} // namespace VideoCommon
diff --git a/src/video_core/buffer_cache/map_interval.h b/src/video_core/buffer_cache/map_interval.h
new file mode 100644
index 000000000..652a35dcd
--- /dev/null
+++ b/src/video_core/buffer_cache/map_interval.h
@@ -0,0 +1,48 @@
+// Copyright 2019 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <boost/functional/hash.hpp>
+#include "common/common_types.h"
+#include "video_core/gpu.h"
+
+namespace VideoCommon {
+
+struct MapInterval {
+ MapInterval(const CacheAddr start, const CacheAddr end) : start{start}, end{end} {}
+ CacheAddr start;
+ CacheAddr end;
+ bool IsInside(const CacheAddr other_start, const CacheAddr other_end) {
+ return (start <= other_start && other_end <= end);
+ }
+
+ bool operator==(const MapInterval& rhs) const {
+ return std::tie(start, end) == std::tie(rhs.start, rhs.end);
+ }
+
+ bool operator!=(const MapInterval& rhs) const {
+ return !operator==(rhs);
+ }
+};
+
+struct MapInfo {
+ GPUVAddr gpu_addr;
+ VAddr cpu_addr;
+};
+
+} // namespace VideoCommon
+
+namespace std {
+
+template <>
+struct hash<VideoCommon::MapInterval> {
+ std::size_t operator()(const VideoCommon::MapInterval& k) const noexcept {
+ std::size_t a = std::hash<CacheAddr>()(k.start);
+ boost::hash_combine(a, std::hash<CacheAddr>()(k.end));
+ return a;
+ }
+};
+
+} // namespace std