yuzu/src/video_core/shader_cache.cpp

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// Copyright 2021 yuzu Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include <algorithm>
#include <array>
#include <vector>
#include "common/assert.h"
#include "shader_recompiler/frontend/maxwell/control_flow.h"
#include "shader_recompiler/object_pool.h"
#include "video_core/dirty_flags.h"
#include "video_core/engines/kepler_compute.h"
#include "video_core/engines/maxwell_3d.h"
#include "video_core/memory_manager.h"
#include "video_core/shader_cache.h"
#include "video_core/shader_environment.h"
namespace VideoCommon {
void ShaderCache::InvalidateRegion(VAddr addr, size_t size) {
std::scoped_lock lock{invalidation_mutex};
InvalidatePagesInRegion(addr, size);
RemovePendingShaders();
}
void ShaderCache::OnCPUWrite(VAddr addr, size_t size) {
std::lock_guard lock{invalidation_mutex};
InvalidatePagesInRegion(addr, size);
}
void ShaderCache::SyncGuestHost() {
std::scoped_lock lock{invalidation_mutex};
RemovePendingShaders();
}
ShaderCache::ShaderCache(VideoCore::RasterizerInterface& rasterizer_,
Tegra::MemoryManager& gpu_memory_, Tegra::Engines::Maxwell3D& maxwell3d_,
Tegra::Engines::KeplerCompute& kepler_compute_)
: gpu_memory{gpu_memory_}, maxwell3d{maxwell3d_}, kepler_compute{kepler_compute_},
rasterizer{rasterizer_} {}
bool ShaderCache::RefreshStages(std::array<u64, 6>& unique_hashes) {
auto& dirty{maxwell3d.dirty.flags};
if (!dirty[VideoCommon::Dirty::Shaders]) {
return last_shaders_valid;
}
dirty[VideoCommon::Dirty::Shaders] = false;
const GPUVAddr base_addr{maxwell3d.regs.code_address.CodeAddress()};
for (size_t index = 0; index < Tegra::Engines::Maxwell3D::Regs::MaxShaderProgram; ++index) {
if (!maxwell3d.regs.IsShaderConfigEnabled(index)) {
unique_hashes[index] = 0;
continue;
}
const auto& shader_config{maxwell3d.regs.shader_config[index]};
const auto program{static_cast<Tegra::Engines::Maxwell3D::Regs::ShaderProgram>(index)};
const GPUVAddr shader_addr{base_addr + shader_config.offset};
const std::optional<VAddr> cpu_shader_addr{gpu_memory.GpuToCpuAddress(shader_addr)};
if (!cpu_shader_addr) {
LOG_ERROR(HW_GPU, "Invalid GPU address for shader 0x{:016x}", shader_addr);
last_shaders_valid = false;
return false;
}
const ShaderInfo* shader_info{TryGet(*cpu_shader_addr)};
if (!shader_info) {
const u32 start_address{shader_config.offset};
GraphicsEnvironment env{maxwell3d, gpu_memory, program, base_addr, start_address};
shader_info = MakeShaderInfo(env, *cpu_shader_addr);
}
shader_infos[index] = shader_info;
unique_hashes[index] = shader_info->unique_hash;
}
last_shaders_valid = true;
return true;
}
const ShaderInfo* ShaderCache::ComputeShader() {
const GPUVAddr program_base{kepler_compute.regs.code_loc.Address()};
const auto& qmd{kepler_compute.launch_description};
const GPUVAddr shader_addr{program_base + qmd.program_start};
const std::optional<VAddr> cpu_shader_addr{gpu_memory.GpuToCpuAddress(shader_addr)};
if (!cpu_shader_addr) {
LOG_ERROR(HW_GPU, "Invalid GPU address for shader 0x{:016x}", shader_addr);
return nullptr;
}
if (const ShaderInfo* const shader = TryGet(*cpu_shader_addr)) {
return shader;
}
ComputeEnvironment env{kepler_compute, gpu_memory, program_base, qmd.program_start};
return MakeShaderInfo(env, *cpu_shader_addr);
}
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void ShaderCache::GetGraphicsEnvironments(GraphicsEnvironments& result,
const std::array<u64, NUM_PROGRAMS>& unique_hashes) {
size_t env_index{};
const GPUVAddr base_addr{maxwell3d.regs.code_address.CodeAddress()};
for (size_t index = 0; index < NUM_PROGRAMS; ++index) {
if (unique_hashes[index] == 0) {
continue;
}
const auto program{static_cast<Tegra::Engines::Maxwell3D::Regs::ShaderProgram>(index)};
auto& env{result.envs[index]};
const u32 start_address{maxwell3d.regs.shader_config[index].offset};
env = GraphicsEnvironment{maxwell3d, gpu_memory, program, base_addr, start_address};
env.SetCachedSize(shader_infos[index]->size_bytes);
result.env_ptrs[env_index++] = &env;
}
}
ShaderInfo* ShaderCache::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;
}
void ShaderCache::Register(std::unique_ptr<ShaderInfo> data, VAddr addr, 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_SIZE - 1) >> PAGE_BITS;
for (u64 page = addr >> PAGE_BITS; page < page_end; ++page) {
invalidation_cache[page].push_back(entry);
}
storage.push_back(std::move(data));
rasterizer.UpdatePagesCachedCount(addr, size, 1);
}
void ShaderCache::InvalidatePagesInRegion(VAddr addr, size_t size) {
const VAddr addr_end = addr + size;
const u64 page_end = (addr_end + PAGE_SIZE - 1) >> PAGE_BITS;
for (u64 page = addr >> PAGE_BITS; page < page_end; ++page) {
auto it = invalidation_cache.find(page);
if (it == invalidation_cache.end()) {
continue;
}
InvalidatePageEntries(it->second, addr, addr_end);
}
}
void ShaderCache::RemovePendingShaders() {
if (marked_for_removal.empty()) {
return;
}
// Remove duplicates
std::ranges::sort(marked_for_removal);
marked_for_removal.erase(std::unique(marked_for_removal.begin(), marked_for_removal.end()),
marked_for_removal.end());
std::vector<ShaderInfo*> removed_shaders;
removed_shaders.reserve(marked_for_removal.size());
std::scoped_lock lock{lookup_mutex};
for (Entry* const entry : marked_for_removal) {
removed_shaders.push_back(entry->data);
const auto it = lookup_cache.find(entry->addr_start);
ASSERT(it != lookup_cache.end());
lookup_cache.erase(it);
}
marked_for_removal.clear();
if (!removed_shaders.empty()) {
RemoveShadersFromStorage(removed_shaders);
}
}
void ShaderCache::InvalidatePageEntries(std::vector<Entry*>& entries, VAddr addr, VAddr addr_end) {
size_t index = 0;
while (index < entries.size()) {
Entry* const entry = entries[index];
if (!entry->Overlaps(addr, addr_end)) {
++index;
continue;
}
UnmarkMemory(entry);
RemoveEntryFromInvalidationCache(entry);
marked_for_removal.push_back(entry);
}
}
void ShaderCache::RemoveEntryFromInvalidationCache(const Entry* entry) {
const u64 page_end = (entry->addr_end + PAGE_SIZE - 1) >> PAGE_BITS;
for (u64 page = entry->addr_start >> PAGE_BITS; page < page_end; ++page) {
const auto entries_it = invalidation_cache.find(page);
ASSERT(entries_it != invalidation_cache.end());
std::vector<Entry*>& entries = entries_it->second;
const auto entry_it = std::ranges::find(entries, entry);
ASSERT(entry_it != entries.end());
entries.erase(entry_it);
}
}
void ShaderCache::UnmarkMemory(Entry* entry) {
if (!entry->is_memory_marked) {
return;
}
entry->is_memory_marked = false;
const VAddr addr = entry->addr_start;
const size_t size = entry->addr_end - addr;
rasterizer.UpdatePagesCachedCount(addr, size, -1);
}
void ShaderCache::RemoveShadersFromStorage(std::span<ShaderInfo*> removed_shaders) {
// Remove them from the cache
std::erase_if(storage, [&removed_shaders](const std::unique_ptr<ShaderInfo>& shader) {
return std::ranges::find(removed_shaders, shader.get()) != removed_shaders.end();
});
}
ShaderCache::Entry* ShaderCache::NewEntry(VAddr addr, VAddr addr_end, ShaderInfo* 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;
}
const ShaderInfo* ShaderCache::MakeShaderInfo(GenericEnvironment& env, VAddr cpu_addr) {
auto info = std::make_unique<ShaderInfo>();
if (const std::optional<u64> cached_hash{env.Analyze()}) {
info->unique_hash = *cached_hash;
info->size_bytes = env.CachedSize();
} else {
// Slow path, not really hit on commercial games
// Build a control flow graph to get the real shader size
Shader::ObjectPool<Shader::Maxwell::Flow::Block> flow_block;
Shader::Maxwell::Flow::CFG cfg{env, flow_block, env.StartAddress()};
info->unique_hash = env.CalculateHash();
info->size_bytes = env.ReadSize();
}
const size_t size_bytes{info->size_bytes};
const ShaderInfo* const result{info.get()};
Register(std::move(info), cpu_addr, size_bytes);
return result;
}
} // namespace VideoCommon