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query_cache: Abstract OpenGL implementation
query_cache: Abstract OpenGL implementation
Abstract the current OpenGL implementation into the VideoCommon namespace and reimplement it on top of that. Doing this avoids repeating code and logic in the Vulkan implementation.pull/15/merge
ReinUsesLisp
6 years ago
4 changed files with 394 additions and 339 deletions
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1src/video_core/CMakeLists.txt
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323src/video_core/query_cache.h
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287src/video_core/renderer_opengl/gl_query_cache.cpp
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122src/video_core/renderer_opengl/gl_query_cache.h
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// Copyright 2020 yuzu Emulator Project |
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// Licensed under GPLv2 or any later version |
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// Refer to the license.txt file included. |
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#pragma once |
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#include <algorithm> |
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#include <array> |
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#include <cstring> |
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#include <iterator> |
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#include <memory> |
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#include <optional> |
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#include <unordered_map> |
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#include <vector> |
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#include "common/assert.h" |
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#include "core/core.h" |
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#include "video_core/engines/maxwell_3d.h" |
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#include "video_core/gpu.h" |
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#include "video_core/memory_manager.h" |
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#include "video_core/rasterizer_interface.h" |
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namespace VideoCommon { |
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template <class QueryCache, class HostCounter> |
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class CounterStreamBase { |
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public: |
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explicit CounterStreamBase(QueryCache& cache, VideoCore::QueryType type) |
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: cache{cache}, type{type} {} |
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/// Updates the state of the stream, enabling or disabling as needed. |
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void Update(bool enabled) { |
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if (enabled) { |
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Enable(); |
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} else { |
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Disable(); |
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} |
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} |
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/// Resets the stream to zero. It doesn't disable the query after resetting. |
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void Reset() { |
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if (current) { |
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current->EndQuery(); |
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// Immediately start a new query to avoid disabling its state. |
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current = cache.Counter(nullptr, type); |
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} |
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last = nullptr; |
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} |
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/// Returns the current counter slicing as needed. |
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std::shared_ptr<HostCounter> Current() { |
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if (!current) { |
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return nullptr; |
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} |
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current->EndQuery(); |
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last = std::move(current); |
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current = cache.Counter(last, type); |
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return last; |
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} |
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/// Returns true when the counter stream is enabled. |
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bool IsEnabled() const { |
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return static_cast<bool>(current); |
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} |
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private: |
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/// Enables the stream. |
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void Enable() { |
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if (current) { |
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return; |
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} |
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current = cache.Counter(last, type); |
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} |
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// Disables the stream. |
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void Disable() { |
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if (current) { |
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current->EndQuery(); |
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} |
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last = std::exchange(current, nullptr); |
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} |
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QueryCache& cache; |
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const VideoCore::QueryType type; |
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std::shared_ptr<HostCounter> current; |
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std::shared_ptr<HostCounter> last; |
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}; |
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template <class QueryCache, class CachedQuery, class CounterStream, class HostCounter> |
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class QueryCacheBase { |
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public: |
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explicit QueryCacheBase(Core::System& system, VideoCore::RasterizerInterface& rasterizer) |
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: system{system}, rasterizer{rasterizer}, streams{{CounterStream{ |
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static_cast<QueryCache&>(*this), |
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VideoCore::QueryType::SamplesPassed}}} {} |
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void InvalidateRegion(CacheAddr addr, std::size_t size) { |
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FlushAndRemoveRegion(addr, size); |
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} |
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void FlushRegion(CacheAddr addr, std::size_t size) { |
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FlushAndRemoveRegion(addr, size); |
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} |
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/** |
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* Records a query in GPU mapped memory, potentially marked with a timestamp. |
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* @param gpu_addr GPU address to flush to when the mapped memory is read. |
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* @param type Query type, e.g. SamplesPassed. |
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* @param timestamp Timestamp, when empty the flushed query is assumed to be short. |
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*/ |
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void Query(GPUVAddr gpu_addr, VideoCore::QueryType type, std::optional<u64> timestamp) { |
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auto& memory_manager = system.GPU().MemoryManager(); |
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const auto host_ptr = memory_manager.GetPointer(gpu_addr); |
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CachedQuery* query = TryGet(ToCacheAddr(host_ptr)); |
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if (!query) { |
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const auto cpu_addr = memory_manager.GpuToCpuAddress(gpu_addr); |
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ASSERT_OR_EXECUTE(cpu_addr, return;); |
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query = Register(type, *cpu_addr, host_ptr, timestamp.has_value()); |
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} |
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query->BindCounter(Stream(type).Current(), timestamp); |
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} |
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/// Updates counters from GPU state. Expected to be called once per draw, clear or dispatch. |
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void UpdateCounters() { |
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const auto& regs = system.GPU().Maxwell3D().regs; |
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Stream(VideoCore::QueryType::SamplesPassed).Update(regs.samplecnt_enable); |
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} |
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/// Resets a counter to zero. It doesn't disable the query after resetting. |
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void ResetCounter(VideoCore::QueryType type) { |
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Stream(type).Reset(); |
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} |
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/// Returns a new host counter. |
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std::shared_ptr<HostCounter> Counter(std::shared_ptr<HostCounter> dependency, |
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VideoCore::QueryType type) { |
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return std::make_shared<HostCounter>(static_cast<QueryCache&>(*this), std::move(dependency), |
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type); |
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} |
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/// Returns the counter stream of the specified type. |
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CounterStream& Stream(VideoCore::QueryType type) { |
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return streams[static_cast<std::size_t>(type)]; |
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} |
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private: |
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/// Flushes a memory range to guest memory and removes it from the cache. |
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void FlushAndRemoveRegion(CacheAddr addr, std::size_t size) { |
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const u64 addr_begin = static_cast<u64>(addr); |
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const u64 addr_end = addr_begin + static_cast<u64>(size); |
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const auto in_range = [addr_begin, addr_end](CachedQuery& query) { |
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const u64 cache_begin = query.CacheAddr(); |
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const u64 cache_end = cache_begin + query.SizeInBytes(); |
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return cache_begin < addr_end && addr_begin < cache_end; |
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}; |
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const u64 page_end = addr_end >> PAGE_SHIFT; |
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for (u64 page = addr_begin >> PAGE_SHIFT; page <= page_end; ++page) { |
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const auto& it = cached_queries.find(page); |
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if (it == std::end(cached_queries)) { |
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continue; |
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} |
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auto& contents = it->second; |
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for (auto& query : contents) { |
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if (!in_range(query)) { |
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continue; |
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} |
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rasterizer.UpdatePagesCachedCount(query.CpuAddr(), query.SizeInBytes(), -1); |
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query.Flush(); |
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} |
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contents.erase(std::remove_if(std::begin(contents), std::end(contents), in_range), |
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std::end(contents)); |
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} |
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} |
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/// Registers the passed parameters as cached and returns a pointer to the stored cached query. |
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CachedQuery* Register(VideoCore::QueryType type, VAddr cpu_addr, u8* host_ptr, bool timestamp) { |
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rasterizer.UpdatePagesCachedCount(cpu_addr, CachedQuery::SizeInBytes(timestamp), 1); |
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const u64 page = static_cast<u64>(ToCacheAddr(host_ptr)) >> PAGE_SHIFT; |
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return &cached_queries[page].emplace_back(static_cast<QueryCache&>(*this), type, cpu_addr, |
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host_ptr); |
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} |
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/// Tries to a get a cached query. Returns nullptr on failure. |
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CachedQuery* TryGet(CacheAddr addr) { |
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const u64 page = static_cast<u64>(addr) >> PAGE_SHIFT; |
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const auto it = cached_queries.find(page); |
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if (it == std::end(cached_queries)) { |
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return nullptr; |
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} |
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auto& contents = it->second; |
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const auto found = std::find_if(std::begin(contents), std::end(contents), |
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[addr](auto& query) { return query.CacheAddr() == addr; }); |
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return found != std::end(contents) ? &*found : nullptr; |
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} |
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static constexpr std::uintptr_t PAGE_SIZE = 4096; |
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static constexpr int PAGE_SHIFT = 12; |
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Core::System& system; |
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VideoCore::RasterizerInterface& rasterizer; |
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std::unordered_map<u64, std::vector<CachedQuery>> cached_queries; |
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std::array<CounterStream, VideoCore::NumQueryTypes> streams; |
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}; |
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template <class QueryCache, class HostCounter> |
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class HostCounterBase { |
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public: |
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explicit HostCounterBase(std::shared_ptr<HostCounter> dependency) |
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: dependency{std::move(dependency)} {} |
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/// Returns the current value of the query. |
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u64 Query() { |
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if (result) { |
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return *result; |
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} |
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u64 value = BlockingQuery(); |
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if (dependency) { |
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value += dependency->Query(); |
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} |
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return *(result = value); |
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} |
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/// Returns true when flushing this query will potentially wait. |
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bool WaitPending() const noexcept { |
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return result.has_value(); |
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} |
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protected: |
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/// Returns the value of query from the backend API blocking as needed. |
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virtual u64 BlockingQuery() const = 0; |
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private: |
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std::shared_ptr<HostCounter> dependency; ///< Counter to add to this value. |
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std::optional<u64> result; ///< Filled with the already returned value. |
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}; |
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template <class HostCounter> |
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class CachedQueryBase { |
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public: |
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explicit CachedQueryBase(VAddr cpu_addr, u8* host_ptr) |
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: cpu_addr{cpu_addr}, host_ptr{host_ptr} {} |
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CachedQueryBase(CachedQueryBase&& rhs) noexcept |
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: cpu_addr{rhs.cpu_addr}, host_ptr{rhs.host_ptr}, counter{std::move(rhs.counter)}, |
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timestamp{rhs.timestamp} {} |
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CachedQueryBase(const CachedQueryBase&) = delete; |
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CachedQueryBase& operator=(CachedQueryBase&& rhs) noexcept { |
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cpu_addr = rhs.cpu_addr; |
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host_ptr = rhs.host_ptr; |
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counter = std::move(rhs.counter); |
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timestamp = rhs.timestamp; |
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return *this; |
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} |
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/// Flushes the query to guest memory. |
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virtual void Flush() { |
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// When counter is nullptr it means that it's just been reseted. We are supposed to write a |
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// zero in these cases. |
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const u64 value = counter ? counter->Query() : 0; |
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std::memcpy(host_ptr, &value, sizeof(u64)); |
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if (timestamp) { |
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std::memcpy(host_ptr + TIMESTAMP_OFFSET, &*timestamp, sizeof(u64)); |
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} |
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} |
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/// Binds a counter to this query. |
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void BindCounter(std::shared_ptr<HostCounter> counter_, std::optional<u64> timestamp_) { |
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if (counter) { |
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// If there's an old counter set it means the query is being rewritten by the game. |
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// To avoid losing the data forever, flush here. |
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Flush(); |
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} |
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counter = std::move(counter_); |
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timestamp = timestamp_; |
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} |
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VAddr CpuAddr() const noexcept { |
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return cpu_addr; |
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} |
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CacheAddr CacheAddr() const noexcept { |
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return ToCacheAddr(host_ptr); |
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} |
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u64 SizeInBytes() const noexcept { |
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return SizeInBytes(timestamp.has_value()); |
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} |
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static u64 SizeInBytes(bool with_timestamp) { |
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return with_timestamp ? LARGE_QUERY_SIZE : SMALL_QUERY_SIZE; |
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} |
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protected: |
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/// Returns true when querying the counter may potentially block. |
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bool WaitPending() const noexcept { |
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return counter && counter->WaitPending(); |
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} |
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private: |
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static constexpr std::size_t SMALL_QUERY_SIZE = 8; // Query size without timestamp. |
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static constexpr std::size_t LARGE_QUERY_SIZE = 16; // Query size with timestamp. |
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static constexpr std::intptr_t TIMESTAMP_OFFSET = 8; // Timestamp offset in a large query. |
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VAddr cpu_addr; ///< Guest CPU address. |
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u8* host_ptr; ///< Writable host pointer. |
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std::shared_ptr<HostCounter> counter; ///< Host counter to query, owns the dependency tree. |
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std::optional<u64> timestamp; ///< Timestamp to flush to guest memory. |
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}; |
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} // namespace VideoCommon |
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