426 lines
15 KiB
C++
426 lines
15 KiB
C++
// Copyright 2018 yuzu emulator team
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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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#include "common/alignment.h"
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#include "common/assert.h"
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#include "common/logging/log.h"
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#include "core/core.h"
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#include "core/memory.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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#include "video_core/renderer_base.h"
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namespace Tegra {
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MemoryManager::MemoryManager() {
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std::fill(page_table.pointers.begin(), page_table.pointers.end(), nullptr);
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std::fill(page_table.attributes.begin(), page_table.attributes.end(),
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Common::PageType::Unmapped);
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page_table.Resize(address_space_width);
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// Initialize the map with a single free region covering the entire managed space.
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VirtualMemoryArea initial_vma;
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initial_vma.size = address_space_end;
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vma_map.emplace(initial_vma.base, initial_vma);
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UpdatePageTableForVMA(initial_vma);
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}
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GPUVAddr MemoryManager::AllocateSpace(u64 size, u64 align) {
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const GPUVAddr gpu_addr{
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FindFreeRegion(address_space_base, size, align, VirtualMemoryArea::Type::Unmapped)};
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AllocateMemory(gpu_addr, 0, size);
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return gpu_addr;
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}
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GPUVAddr MemoryManager::AllocateSpace(GPUVAddr gpu_addr, u64 size, u64 align) {
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AllocateMemory(gpu_addr, 0, size);
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return gpu_addr;
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}
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GPUVAddr MemoryManager::MapBufferEx(GPUVAddr cpu_addr, u64 size) {
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const GPUVAddr gpu_addr{
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FindFreeRegion(address_space_base, size, page_size, VirtualMemoryArea::Type::Unmapped)};
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MapBackingMemory(gpu_addr, Memory::GetPointer(cpu_addr), ((size + page_mask) & ~page_mask),
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cpu_addr);
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return gpu_addr;
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}
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GPUVAddr MemoryManager::MapBufferEx(GPUVAddr cpu_addr, GPUVAddr gpu_addr, u64 size) {
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ASSERT((gpu_addr & page_mask) == 0);
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MapBackingMemory(gpu_addr, Memory::GetPointer(cpu_addr), ((size + page_mask) & ~page_mask),
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cpu_addr);
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return gpu_addr;
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}
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GPUVAddr MemoryManager::UnmapBuffer(GPUVAddr gpu_addr, u64 size) {
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ASSERT((gpu_addr & page_mask) == 0);
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const CacheAddr cache_addr{ToCacheAddr(GetPointer(gpu_addr))};
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Core::System::GetInstance().Renderer().Rasterizer().FlushAndInvalidateRegion(cache_addr, size);
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UnmapRange(gpu_addr, ((size + page_mask) & ~page_mask));
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return gpu_addr;
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}
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GPUVAddr MemoryManager::FindFreeRegion(GPUVAddr region_start, u64 size, u64 align,
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VirtualMemoryArea::Type vma_type) {
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align = (align + page_mask) & ~page_mask;
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// Find the first Free VMA.
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const GPUVAddr base = region_start;
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const VMAHandle vma_handle = std::find_if(vma_map.begin(), vma_map.end(), [&](const auto& vma) {
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if (vma.second.type != vma_type)
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return false;
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const VAddr vma_end = vma.second.base + vma.second.size;
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return vma_end > base && vma_end >= base + size;
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});
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if (vma_handle == vma_map.end()) {
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return {};
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}
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return std::max(base, vma_handle->second.base);
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}
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std::optional<VAddr> MemoryManager::GpuToCpuAddress(GPUVAddr gpu_addr) {
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VAddr cpu_addr = page_table.backing_addr[gpu_addr >> page_bits];
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if (cpu_addr) {
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return cpu_addr + (gpu_addr & page_mask);
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}
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return {};
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}
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template <typename T>
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T MemoryManager::Read(GPUVAddr vaddr) {
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const u8* page_pointer = page_table.pointers[vaddr >> page_bits];
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if (page_pointer) {
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// NOTE: Avoid adding any extra logic to this fast-path block
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T value;
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std::memcpy(&value, &page_pointer[vaddr & page_mask], sizeof(T));
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return value;
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}
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Common::PageType type = page_table.attributes[vaddr >> page_bits];
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switch (type) {
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case Common::PageType::Unmapped:
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LOG_ERROR(HW_GPU, "Unmapped Read{} @ 0x{:08X}", sizeof(T) * 8, vaddr);
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return 0;
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case Common::PageType::Memory:
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ASSERT_MSG(false, "Mapped memory page without a pointer @ {:016X}", vaddr);
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break;
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default:
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UNREACHABLE();
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}
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return {};
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}
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template <typename T>
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void MemoryManager::Write(GPUVAddr vaddr, T data) {
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u8* page_pointer = page_table.pointers[vaddr >> page_bits];
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if (page_pointer) {
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// NOTE: Avoid adding any extra logic to this fast-path block
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std::memcpy(&page_pointer[vaddr & page_mask], &data, sizeof(T));
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return;
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}
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Common::PageType type = page_table.attributes[vaddr >> page_bits];
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switch (type) {
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case Common::PageType::Unmapped:
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LOG_ERROR(HW_GPU, "Unmapped Write{} 0x{:08X} @ 0x{:016X}", sizeof(data) * 8,
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static_cast<u32>(data), vaddr);
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return;
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case Common::PageType::Memory:
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ASSERT_MSG(false, "Mapped memory page without a pointer @ {:016X}", vaddr);
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break;
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default:
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UNREACHABLE();
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}
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}
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template u8 MemoryManager::Read<u8>(GPUVAddr addr);
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template u16 MemoryManager::Read<u16>(GPUVAddr addr);
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template u32 MemoryManager::Read<u32>(GPUVAddr addr);
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template u64 MemoryManager::Read<u64>(GPUVAddr addr);
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template void MemoryManager::Write<u8>(GPUVAddr addr, u8 data);
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template void MemoryManager::Write<u16>(GPUVAddr addr, u16 data);
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template void MemoryManager::Write<u32>(GPUVAddr addr, u32 data);
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template void MemoryManager::Write<u64>(GPUVAddr addr, u64 data);
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u8* MemoryManager::GetPointer(GPUVAddr addr) {
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u8* page_pointer = page_table.pointers[addr >> page_bits];
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if (page_pointer) {
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return page_pointer + (addr & page_mask);
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}
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LOG_ERROR(HW_GPU, "Unknown GetPointer @ 0x{:016X}", addr);
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return {};
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}
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void MemoryManager::ReadBlock(GPUVAddr src_addr, void* dest_buffer, std::size_t size) {
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std::memcpy(dest_buffer, GetPointer(src_addr), size);
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}
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void MemoryManager::WriteBlock(GPUVAddr dest_addr, const void* src_buffer, std::size_t size) {
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std::memcpy(GetPointer(dest_addr), src_buffer, size);
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}
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void MemoryManager::CopyBlock(GPUVAddr dest_addr, GPUVAddr src_addr, std::size_t size) {
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std::memcpy(GetPointer(dest_addr), GetPointer(src_addr), size);
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}
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void MemoryManager::MapPages(GPUVAddr base, u64 size, u8* memory, Common::PageType type,
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VAddr backing_addr) {
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LOG_DEBUG(HW_GPU, "Mapping {} onto {:016X}-{:016X}", fmt::ptr(memory), base * page_size,
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(base + size) * page_size);
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VAddr end = base + size;
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ASSERT_MSG(end <= page_table.pointers.size(), "out of range mapping at {:016X}",
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base + page_table.pointers.size());
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std::fill(page_table.attributes.begin() + base, page_table.attributes.begin() + end, type);
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if (memory == nullptr) {
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std::fill(page_table.pointers.begin() + base, page_table.pointers.begin() + end, memory);
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std::fill(page_table.backing_addr.begin() + base, page_table.backing_addr.begin() + end,
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backing_addr);
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} else {
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while (base != end) {
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page_table.pointers[base] = memory;
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page_table.backing_addr[base] = backing_addr;
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base += 1;
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memory += page_size;
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backing_addr += page_size;
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}
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}
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}
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void MemoryManager::MapMemoryRegion(GPUVAddr base, u64 size, u8* target, VAddr backing_addr) {
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ASSERT_MSG((size & page_mask) == 0, "non-page aligned size: {:016X}", size);
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ASSERT_MSG((base & page_mask) == 0, "non-page aligned base: {:016X}", base);
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MapPages(base / page_size, size / page_size, target, Common::PageType::Memory, backing_addr);
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}
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void MemoryManager::UnmapRegion(GPUVAddr base, u64 size) {
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ASSERT_MSG((size & page_mask) == 0, "non-page aligned size: {:016X}", size);
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ASSERT_MSG((base & page_mask) == 0, "non-page aligned base: {:016X}", base);
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MapPages(base / page_size, size / page_size, nullptr, Common::PageType::Unmapped);
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}
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bool VirtualMemoryArea::CanBeMergedWith(const VirtualMemoryArea& next) const {
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ASSERT(base + size == next.base);
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if (type != next.type) {
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return {};
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}
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if (type == VirtualMemoryArea::Type::Allocated && (offset + size != next.offset)) {
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return {};
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}
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if (type == VirtualMemoryArea::Type::Mapped && backing_memory + size != next.backing_memory) {
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return {};
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}
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return true;
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}
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MemoryManager::VMAHandle MemoryManager::FindVMA(GPUVAddr target) const {
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if (target >= address_space_end) {
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return vma_map.end();
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} else {
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return std::prev(vma_map.upper_bound(target));
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}
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}
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MemoryManager::VMAHandle MemoryManager::AllocateMemory(GPUVAddr target, std::size_t offset,
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u64 size) {
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// This is the appropriately sized VMA that will turn into our allocation.
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VMAIter vma_handle = CarveVMA(target, size);
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VirtualMemoryArea& final_vma = vma_handle->second;
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ASSERT(final_vma.size == size);
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final_vma.type = VirtualMemoryArea::Type::Allocated;
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final_vma.offset = offset;
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UpdatePageTableForVMA(final_vma);
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return MergeAdjacent(vma_handle);
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}
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MemoryManager::VMAHandle MemoryManager::MapBackingMemory(GPUVAddr target, u8* memory, u64 size,
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VAddr backing_addr) {
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// This is the appropriately sized VMA that will turn into our allocation.
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VMAIter vma_handle = CarveVMA(target, size);
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VirtualMemoryArea& final_vma = vma_handle->second;
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ASSERT(final_vma.size == size);
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final_vma.type = VirtualMemoryArea::Type::Mapped;
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final_vma.backing_memory = memory;
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final_vma.backing_addr = backing_addr;
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UpdatePageTableForVMA(final_vma);
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return MergeAdjacent(vma_handle);
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}
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MemoryManager::VMAIter MemoryManager::Unmap(VMAIter vma_handle) {
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VirtualMemoryArea& vma = vma_handle->second;
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vma.type = VirtualMemoryArea::Type::Allocated;
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vma.offset = 0;
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vma.backing_memory = nullptr;
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UpdatePageTableForVMA(vma);
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return MergeAdjacent(vma_handle);
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}
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void MemoryManager::UnmapRange(GPUVAddr target, u64 size) {
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VMAIter vma = CarveVMARange(target, size);
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const VAddr target_end = target + size;
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const VMAIter end = vma_map.end();
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// The comparison against the end of the range must be done using addresses since VMAs can be
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// merged during this process, causing invalidation of the iterators.
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while (vma != end && vma->second.base < target_end) {
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vma = std::next(Unmap(vma));
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}
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ASSERT(FindVMA(target)->second.size >= size);
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}
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MemoryManager::VMAIter MemoryManager::StripIterConstness(const VMAHandle& iter) {
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// This uses a neat C++ trick to convert a const_iterator to a regular iterator, given
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// non-const access to its container.
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return vma_map.erase(iter, iter); // Erases an empty range of elements
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}
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MemoryManager::VMAIter MemoryManager::CarveVMA(GPUVAddr base, u64 size) {
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ASSERT_MSG((size & Tegra::MemoryManager::page_mask) == 0, "non-page aligned size: 0x{:016X}",
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size);
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ASSERT_MSG((base & Tegra::MemoryManager::page_mask) == 0, "non-page aligned base: 0x{:016X}",
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base);
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VMAIter vma_handle = StripIterConstness(FindVMA(base));
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if (vma_handle == vma_map.end()) {
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// Target address is outside the range managed by the kernel
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return {};
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}
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const VirtualMemoryArea& vma = vma_handle->second;
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if (vma.type == VirtualMemoryArea::Type::Mapped) {
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// Region is already allocated
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return {};
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}
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const VAddr start_in_vma = base - vma.base;
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const VAddr end_in_vma = start_in_vma + size;
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if (end_in_vma < vma.size) {
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// Split VMA at the end of the allocated region
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SplitVMA(vma_handle, end_in_vma);
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}
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if (start_in_vma != 0) {
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// Split VMA at the start of the allocated region
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vma_handle = SplitVMA(vma_handle, start_in_vma);
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}
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return vma_handle;
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}
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MemoryManager::VMAIter MemoryManager::CarveVMARange(GPUVAddr target, u64 size) {
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ASSERT_MSG((size & Tegra::MemoryManager::page_mask) == 0, "non-page aligned size: 0x{:016X}",
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size);
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ASSERT_MSG((target & Tegra::MemoryManager::page_mask) == 0, "non-page aligned base: 0x{:016X}",
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target);
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const VAddr target_end = target + size;
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ASSERT(target_end >= target);
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ASSERT(size > 0);
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VMAIter begin_vma = StripIterConstness(FindVMA(target));
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const VMAIter i_end = vma_map.lower_bound(target_end);
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if (std::any_of(begin_vma, i_end, [](const auto& entry) {
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return entry.second.type == VirtualMemoryArea::Type::Unmapped;
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})) {
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return {};
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}
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if (target != begin_vma->second.base) {
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begin_vma = SplitVMA(begin_vma, target - begin_vma->second.base);
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}
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VMAIter end_vma = StripIterConstness(FindVMA(target_end));
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if (end_vma != vma_map.end() && target_end != end_vma->second.base) {
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end_vma = SplitVMA(end_vma, target_end - end_vma->second.base);
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}
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return begin_vma;
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}
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MemoryManager::VMAIter MemoryManager::SplitVMA(VMAIter vma_handle, u64 offset_in_vma) {
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VirtualMemoryArea& old_vma = vma_handle->second;
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VirtualMemoryArea new_vma = old_vma; // Make a copy of the VMA
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// For now, don't allow no-op VMA splits (trying to split at a boundary) because it's probably
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// a bug. This restriction might be removed later.
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ASSERT(offset_in_vma < old_vma.size);
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ASSERT(offset_in_vma > 0);
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old_vma.size = offset_in_vma;
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new_vma.base += offset_in_vma;
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new_vma.size -= offset_in_vma;
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switch (new_vma.type) {
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case VirtualMemoryArea::Type::Unmapped:
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break;
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case VirtualMemoryArea::Type::Allocated:
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new_vma.offset += offset_in_vma;
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break;
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case VirtualMemoryArea::Type::Mapped:
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new_vma.backing_memory += offset_in_vma;
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break;
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}
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ASSERT(old_vma.CanBeMergedWith(new_vma));
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return vma_map.emplace_hint(std::next(vma_handle), new_vma.base, new_vma);
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}
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MemoryManager::VMAIter MemoryManager::MergeAdjacent(VMAIter iter) {
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const VMAIter next_vma = std::next(iter);
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if (next_vma != vma_map.end() && iter->second.CanBeMergedWith(next_vma->second)) {
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iter->second.size += next_vma->second.size;
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vma_map.erase(next_vma);
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}
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if (iter != vma_map.begin()) {
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VMAIter prev_vma = std::prev(iter);
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if (prev_vma->second.CanBeMergedWith(iter->second)) {
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prev_vma->second.size += iter->second.size;
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vma_map.erase(iter);
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iter = prev_vma;
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}
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}
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return iter;
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}
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void MemoryManager::UpdatePageTableForVMA(const VirtualMemoryArea& vma) {
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switch (vma.type) {
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case VirtualMemoryArea::Type::Unmapped:
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UnmapRegion(vma.base, vma.size);
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break;
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case VirtualMemoryArea::Type::Allocated:
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MapMemoryRegion(vma.base, vma.size, nullptr, vma.backing_addr);
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break;
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case VirtualMemoryArea::Type::Mapped:
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MapMemoryRegion(vma.base, vma.size, vma.backing_memory, vma.backing_addr);
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break;
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}
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}
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} // namespace Tegra
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