diff options
Diffstat (limited to '')
| -rw-r--r-- | src/video_core/CMakeLists.txt | 1 | ||||
| -rw-r--r-- | src/video_core/shader_cache.h | 228 |
2 files changed, 229 insertions, 0 deletions
diff --git a/src/video_core/CMakeLists.txt b/src/video_core/CMakeLists.txt index 2bf8d68ce..cf1885f92 100644 --- a/src/video_core/CMakeLists.txt +++ b/src/video_core/CMakeLists.txt @@ -93,6 +93,7 @@ add_library(video_core STATIC renderer_opengl/utils.h sampler_cache.cpp sampler_cache.h + shader_cache.h shader/decode/arithmetic.cpp shader/decode/arithmetic_immediate.cpp shader/decode/bfe.cpp diff --git a/src/video_core/shader_cache.h b/src/video_core/shader_cache.h new file mode 100644 index 000000000..a23c23886 --- /dev/null +++ b/src/video_core/shader_cache.h @@ -0,0 +1,228 @@ +// Copyright 2020 yuzu Emulator Project +// Licensed under GPLv2 or any later version +// Refer to the license.txt file included. + +#pragma once + +#include <algorithm> +#include <memory> +#include <mutex> +#include <unordered_map> +#include <utility> +#include <vector> + +#include "common/assert.h" +#include "common/common_types.h" +#include "video_core/rasterizer_interface.h" + +namespace VideoCommon { + +template <class T> +class ShaderCache { + static constexpr u64 PAGE_SHIFT = 14; + + struct Entry { + VAddr addr_start; + VAddr addr_end; + T* data; + + bool is_memory_marked = true; + + constexpr bool Overlaps(VAddr start, VAddr end) const noexcept { + return start < addr_end && addr_start < end; + } + }; + +public: + virtual ~ShaderCache() = default; + + /// @brief Removes shaders inside a given region + /// @note Checks for ranges + /// @param addr Start address of the invalidation + /// @param size Number of bytes of the invalidation + void InvalidateRegion(VAddr addr, std::size_t size) { + std::scoped_lock lock{invalidation_mutex}; + InvalidatePagesInRegion(addr, size); + RemovePendingShaders(); + } + + /// @brief Unmarks a memory region as cached and marks it for removal + /// @param addr Start address of the CPU write operation + /// @param size Number of bytes of the CPU write operation + void OnCPUWrite(VAddr addr, std::size_t size) { + std::lock_guard lock{invalidation_mutex}; + InvalidatePagesInRegion(addr, size); + } + + /// @brief Flushes delayed removal operations + void SyncGuestHost() { + std::scoped_lock lock{invalidation_mutex}; + RemovePendingShaders(); + } + + /// @brief Tries to obtain a cached shader starting in a given address + /// @note Doesn't check for ranges, the given address has to be the start of the shader + /// @param addr Start address of the shader, this doesn't cache for region + /// @return Pointer to a valid shader, nullptr when nothing is found + T* TryGet(VAddr addr) const { + std::scoped_lock lock{lookup_mutex}; + + const auto it = lookup_cache.find(addr); + if (it == lookup_cache.end()) { + return nullptr; + } + return it->second->data; + } + +protected: + explicit ShaderCache(VideoCore::RasterizerInterface& rasterizer_) : rasterizer{rasterizer_} {} + + /// @brief Register in the cache a given entry + /// @param data Shader to store in the cache + /// @param addr Start address of the shader that will be registered + /// @param size Size in bytes of the shader + void Register(std::unique_ptr<T> data, VAddr addr, std::size_t size) { + std::scoped_lock lock{invalidation_mutex, lookup_mutex}; + + const VAddr addr_end = addr + size; + Entry* const entry = NewEntry(addr, addr_end, data.get()); + + const u64 page_end = addr_end >> PAGE_SHIFT; + for (u64 page = addr >> PAGE_SHIFT; page <= page_end; ++page) { + invalidation_cache[page].push_back(entry); + } + + storage.push_back(std::move(data)); + + rasterizer.UpdatePagesCachedCount(addr, size, 1); + } + + /// @brief Called when a shader is going to be removed + /// @param shader Shader that will be removed + /// @pre invalidation_cache is locked + /// @pre lookup_mutex is locked + virtual void OnShaderRemoval([[maybe_unused]] T* shader) {} + +private: + /// @brief Invalidate pages in a given region + /// @pre invalidation_mutex is locked + void InvalidatePagesInRegion(VAddr addr, std::size_t size) { + const VAddr addr_end = addr + size; + const u64 page_end = addr_end >> PAGE_SHIFT; + for (u64 page = addr >> PAGE_SHIFT; page <= page_end; ++page) { + const auto it = invalidation_cache.find(page); + if (it == invalidation_cache.end()) { + continue; + } + + std::vector<Entry*>& entries = it->second; + InvalidatePageEntries(entries, addr, addr_end); + + // If there's nothing else in this page, remove it to avoid overpopulating the hash map. + if (entries.empty()) { + invalidation_cache.erase(it); + } + } + } + + /// @brief Remove shaders marked for deletion + /// @pre invalidation_mutex is locked + void RemovePendingShaders() { + if (marked_for_removal.empty()) { + return; + } + std::scoped_lock lock{lookup_mutex}; + + std::vector<T*> removed_shaders; + removed_shaders.reserve(marked_for_removal.size()); + + for (Entry* const entry : marked_for_removal) { + if (lookup_cache.erase(entry->addr_start) > 0) { + removed_shaders.push_back(entry->data); + } + } + marked_for_removal.clear(); + + if (!removed_shaders.empty()) { + RemoveShadersFromStorage(std::move(removed_shaders)); + } + } + + /// @brief Invalidates entries in a given range for the passed page + /// @param entries Vector of entries in the page, it will be modified on overlaps + /// @param addr Start address of the invalidation + /// @param addr_end Non-inclusive end address of the invalidation + /// @pre invalidation_mutex is locked + void InvalidatePageEntries(std::vector<Entry*>& entries, VAddr addr, VAddr addr_end) { + auto it = entries.begin(); + while (it != entries.end()) { + Entry* const entry = *it; + if (!entry->Overlaps(addr, addr_end)) { + ++it; + continue; + } + UnmarkMemory(entry); + marked_for_removal.push_back(entry); + + it = entries.erase(it); + } + } + + /// @brief Unmarks an entry from the rasterizer cache + /// @param entry Entry to unmark from memory + void UnmarkMemory(Entry* entry) { + if (!entry->is_memory_marked) { + return; + } + entry->is_memory_marked = false; + + const VAddr addr = entry->addr_start; + const std::size_t size = entry->addr_end - addr; + rasterizer.UpdatePagesCachedCount(addr, size, -1); + } + + /// @brief Removes a vector of shaders from a list + /// @param removed_shaders Shaders to be removed from the storage, it can contain duplicates + /// @pre invalidation_mutex is locked + /// @pre lookup_mutex is locked + void RemoveShadersFromStorage(std::vector<T*> removed_shaders) { + // Remove duplicates + std::sort(removed_shaders.begin(), removed_shaders.end()); + removed_shaders.erase(std::unique(removed_shaders.begin(), removed_shaders.end()), + removed_shaders.end()); + + // Now that there are no duplicates, we can notify removals + for (T* const shader : removed_shaders) { + OnShaderRemoval(shader); + } + + // Remove them from the cache + const auto is_removed = [&removed_shaders](std::unique_ptr<T>& shader) { + return std::find(removed_shaders.begin(), removed_shaders.end(), shader.get()) != + removed_shaders.end(); + }; + storage.erase(std::remove_if(storage.begin(), storage.end(), is_removed), storage.end()); + } + + /// @brief Creates a new entry in the lookup cache and returns its pointer + /// @pre lookup_mutex is locked + Entry* NewEntry(VAddr addr, VAddr addr_end, T* data) { + auto entry = std::make_unique<Entry>(Entry{addr, addr_end, data}); + Entry* const entry_pointer = entry.get(); + + lookup_cache.emplace(addr, std::move(entry)); + return entry_pointer; + } + + VideoCore::RasterizerInterface& rasterizer; + + mutable std::mutex lookup_mutex; + std::mutex invalidation_mutex; + + std::unordered_map<u64, std::unique_ptr<Entry>> lookup_cache; + std::unordered_map<u64, std::vector<Entry*>> invalidation_cache; + std::vector<std::unique_ptr<T>> storage; + std::vector<Entry*> marked_for_removal; +}; + +} // namespace VideoCommon |