yuzu/src/video_core/rasterizer_cache.h

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// Copyright 2018 yuzu Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#pragma once
#include <mutex>
#include <set>
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#include <unordered_map>
#include <boost/icl/interval_map.hpp>
#include <boost/range/iterator_range_core.hpp>
#include "common/common_types.h"
#include "core/settings.h"
#include "video_core/gpu.h"
#include "video_core/rasterizer_interface.h"
class RasterizerCacheObject {
public:
explicit RasterizerCacheObject(const VAddr cpu_addr) : cpu_addr{cpu_addr} {}
virtual ~RasterizerCacheObject();
VAddr GetCpuAddr() const {
return cpu_addr;
}
/// Gets the size of the shader in guest memory, required for cache management
virtual std::size_t GetSizeInBytes() const = 0;
/// Sets whether the cached object should be considered registered
void SetIsRegistered(bool registered) {
is_registered = registered;
}
/// Returns true if the cached object is registered
bool IsRegistered() const {
return is_registered;
}
/// Returns true if the cached object is dirty
bool IsDirty() const {
return is_dirty;
}
/// Returns ticks from when this cached object was last modified
u64 GetLastModifiedTicks() const {
return last_modified_ticks;
}
/// Marks an object as recently modified, used to specify whether it is clean or dirty
template <class T>
void MarkAsModified(bool dirty, T& cache) {
is_dirty = dirty;
last_modified_ticks = cache.GetModifiedTicks();
}
void SetMemoryMarked(bool is_memory_marked_) {
is_memory_marked = is_memory_marked_;
}
bool IsMemoryMarked() const {
return is_memory_marked;
}
void SetSyncPending(bool is_sync_pending_) {
is_sync_pending = is_sync_pending_;
}
bool IsSyncPending() const {
return is_sync_pending;
}
private:
bool is_registered{}; ///< Whether the object is currently registered with the cache
bool is_dirty{}; ///< Whether the object is dirty (out of sync with guest memory)
bool is_memory_marked{}; ///< Whether the object is marking rasterizer memory.
bool is_sync_pending{}; ///< Whether the object is pending deletion.
u64 last_modified_ticks{}; ///< When the object was last modified, used for in-order flushing
VAddr cpu_addr{}; ///< Cpu address memory, unique from emulated virtual address space
};
template <class T>
class RasterizerCache : NonCopyable {
friend class RasterizerCacheObject;
public:
explicit RasterizerCache(VideoCore::RasterizerInterface& rasterizer) : rasterizer{rasterizer} {}
/// Write any cached resources overlapping the specified region back to memory
void FlushRegion(VAddr addr, std::size_t size) {
std::lock_guard lock{mutex};
const auto& objects{GetSortedObjectsFromRegion(addr, size)};
for (auto& object : objects) {
FlushObject(object);
}
}
/// Mark the specified region as being invalidated
void InvalidateRegion(VAddr addr, u64 size) {
std::lock_guard lock{mutex};
const auto& objects{GetSortedObjectsFromRegion(addr, size)};
for (auto& object : objects) {
if (!object->IsRegistered()) {
// Skip duplicates
continue;
}
Unregister(object);
}
}
void OnCPUWrite(VAddr addr, std::size_t size) {
std::lock_guard lock{mutex};
for (const auto& object : GetSortedObjectsFromRegion(addr, size)) {
if (object->IsRegistered()) {
UnmarkMemory(object);
object->SetSyncPending(true);
marked_for_unregister.emplace_back(object);
}
}
}
void SyncGuestHost() {
std::lock_guard lock{mutex};
for (const auto& object : marked_for_unregister) {
if (object->IsRegistered()) {
object->SetSyncPending(false);
Unregister(object);
}
}
marked_for_unregister.clear();
}
/// Invalidates everything in the cache
void InvalidateAll() {
std::lock_guard lock{mutex};
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while (interval_cache.begin() != interval_cache.end()) {
Unregister(*interval_cache.begin()->second.begin());
}
}
protected:
/// Tries to get an object from the cache with the specified cache address
T TryGet(VAddr addr) const {
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const auto iter = map_cache.find(addr);
if (iter != map_cache.end())
return iter->second;
return nullptr;
}
/// Register an object into the cache
virtual void Register(const T& object) {
std::lock_guard lock{mutex};
object->SetIsRegistered(true);
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interval_cache.add({GetInterval(object), ObjectSet{object}});
map_cache.insert({object->GetCpuAddr(), object});
rasterizer.UpdatePagesCachedCount(object->GetCpuAddr(), object->GetSizeInBytes(), 1);
object->SetMemoryMarked(true);
}
/// Unregisters an object from the cache
virtual void Unregister(const T& object) {
std::lock_guard lock{mutex};
UnmarkMemory(object);
object->SetIsRegistered(false);
if (object->IsSyncPending()) {
marked_for_unregister.remove(object);
object->SetSyncPending(false);
}
const VAddr addr = object->GetCpuAddr();
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interval_cache.subtract({GetInterval(object), ObjectSet{object}});
map_cache.erase(addr);
}
void UnmarkMemory(const T& object) {
if (!object->IsMemoryMarked()) {
return;
}
rasterizer.UpdatePagesCachedCount(object->GetCpuAddr(), object->GetSizeInBytes(), -1);
object->SetMemoryMarked(false);
}
/// Returns a ticks counter used for tracking when cached objects were last modified
u64 GetModifiedTicks() {
std::lock_guard lock{mutex};
return ++modified_ticks;
}
virtual void FlushObjectInner(const T& object) = 0;
/// Flushes the specified object, updating appropriate cache state as needed
void FlushObject(const T& object) {
std::lock_guard lock{mutex};
if (!object->IsDirty()) {
return;
}
FlushObjectInner(object);
object->MarkAsModified(false, *this);
}
std::recursive_mutex mutex;
private:
/// Returns a list of cached objects from the specified memory region, ordered by access time
std::vector<T> GetSortedObjectsFromRegion(VAddr addr, u64 size) {
if (size == 0) {
return {};
}
std::vector<T> objects;
const ObjectInterval interval{addr, addr + size};
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for (auto& pair : boost::make_iterator_range(interval_cache.equal_range(interval))) {
for (auto& cached_object : pair.second) {
if (!cached_object) {
continue;
}
objects.push_back(cached_object);
}
}
std::sort(objects.begin(), objects.end(), [](const T& a, const T& b) -> bool {
return a->GetLastModifiedTicks() < b->GetLastModifiedTicks();
});
return objects;
}
using ObjectSet = std::set<T>;
using ObjectCache = std::unordered_map<VAddr, T>;
using IntervalCache = boost::icl::interval_map<VAddr, ObjectSet>;
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using ObjectInterval = typename IntervalCache::interval_type;
static auto GetInterval(const T& object) {
return ObjectInterval::right_open(object->GetCpuAddr(),
object->GetCpuAddr() + object->GetSizeInBytes());
}
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ObjectCache map_cache;
IntervalCache interval_cache; ///< Cache of objects
u64 modified_ticks{}; ///< Counter of cache state ticks, used for in-order flushing
VideoCore::RasterizerInterface& rasterizer;
std::list<T> marked_for_unregister;
};