324 lines
11 KiB
C++
324 lines
11 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 "core/core.h"
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#include "core/hle/kernel/memory/page_table.h"
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#include "core/hle/kernel/process.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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namespace Tegra {
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MemoryManager::MemoryManager(Core::System& system, VideoCore::RasterizerInterface& rasterizer)
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: system{system}, rasterizer{rasterizer}, page_table(page_table_size) {}
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MemoryManager::~MemoryManager() = default;
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GPUVAddr MemoryManager::UpdateRange(GPUVAddr gpu_addr, PageEntry page_entry, std::size_t size) {
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u64 remaining_size{size};
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for (u64 offset{}; offset < size; offset += page_size) {
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if (remaining_size < page_size) {
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SetPageEntry(gpu_addr + offset, page_entry + offset, remaining_size);
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} else {
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SetPageEntry(gpu_addr + offset, page_entry + offset);
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}
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remaining_size -= page_size;
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}
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return gpu_addr;
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}
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GPUVAddr MemoryManager::Map(VAddr cpu_addr, GPUVAddr gpu_addr, std::size_t size) {
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return UpdateRange(gpu_addr, cpu_addr, size);
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}
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GPUVAddr MemoryManager::MapAllocate(VAddr cpu_addr, std::size_t size, std::size_t align) {
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return Map(cpu_addr, *FindFreeRange(size, align), size);
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}
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void MemoryManager::Unmap(GPUVAddr gpu_addr, std::size_t size) {
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if (!size) {
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return;
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}
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// Flush and invalidate through the GPU interface, to be asynchronous if possible.
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system.GPU().FlushAndInvalidateRegion(*GpuToCpuAddress(gpu_addr), size);
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UpdateRange(gpu_addr, PageEntry::State::Unmapped, size);
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}
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std::optional<GPUVAddr> MemoryManager::AllocateFixed(GPUVAddr gpu_addr, std::size_t size) {
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for (u64 offset{}; offset < size; offset += page_size) {
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if (!GetPageEntry(gpu_addr + offset).IsUnmapped()) {
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return {};
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}
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}
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return UpdateRange(gpu_addr, PageEntry::State::Allocated, size);
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}
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GPUVAddr MemoryManager::Allocate(std::size_t size, std::size_t align) {
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return *AllocateFixed(*FindFreeRange(size, align), size);
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}
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void MemoryManager::TryLockPage(PageEntry page_entry, std::size_t size) {
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if (!page_entry.IsValid()) {
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return;
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}
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ASSERT(system.CurrentProcess()
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->PageTable()
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.LockForDeviceAddressSpace(page_entry.ToAddress(), size)
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.IsSuccess());
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}
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void MemoryManager::TryUnlockPage(PageEntry page_entry, std::size_t size) {
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if (!page_entry.IsValid()) {
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return;
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}
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ASSERT(system.CurrentProcess()
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->PageTable()
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.UnlockForDeviceAddressSpace(page_entry.ToAddress(), size)
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.IsSuccess());
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}
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PageEntry MemoryManager::GetPageEntry(GPUVAddr gpu_addr) const {
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return page_table[PageEntryIndex(gpu_addr)];
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}
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void MemoryManager::SetPageEntry(GPUVAddr gpu_addr, PageEntry page_entry, std::size_t size) {
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// TODO(bunnei): We should lock/unlock device regions. This currently causes issues due to
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// improper tracking, but should be fixed in the future.
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//// Unlock the old page
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// TryUnlockPage(page_table[PageEntryIndex(gpu_addr)], size);
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//// Lock the new page
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// TryLockPage(page_entry, size);
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page_table[PageEntryIndex(gpu_addr)] = page_entry;
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}
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std::optional<GPUVAddr> MemoryManager::FindFreeRange(std::size_t size, std::size_t align) const {
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if (!align) {
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align = page_size;
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} else {
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align = Common::AlignUp(align, page_size);
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}
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u64 available_size{};
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GPUVAddr gpu_addr{address_space_start};
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while (gpu_addr + available_size < address_space_size) {
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if (GetPageEntry(gpu_addr + available_size).IsUnmapped()) {
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available_size += page_size;
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if (available_size >= size) {
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return gpu_addr;
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}
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} else {
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gpu_addr += available_size + page_size;
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available_size = 0;
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const auto remainder{gpu_addr % align};
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if (remainder) {
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gpu_addr = (gpu_addr - remainder) + align;
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}
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}
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}
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return {};
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}
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std::optional<VAddr> MemoryManager::GpuToCpuAddress(GPUVAddr gpu_addr) const {
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const auto page_entry{GetPageEntry(gpu_addr)};
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if (!page_entry.IsValid()) {
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return {};
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}
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return page_entry.ToAddress() + (gpu_addr & page_mask);
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}
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template <typename T>
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T MemoryManager::Read(GPUVAddr addr) const {
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if (auto page_pointer{GetPointer(addr)}; 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, sizeof(T));
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return value;
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}
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UNREACHABLE();
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return {};
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}
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template <typename T>
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void MemoryManager::Write(GPUVAddr addr, T data) {
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if (auto page_pointer{GetPointer(addr)}; 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, &data, sizeof(T));
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return;
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}
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UNREACHABLE();
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}
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template u8 MemoryManager::Read<u8>(GPUVAddr addr) const;
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template u16 MemoryManager::Read<u16>(GPUVAddr addr) const;
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template u32 MemoryManager::Read<u32>(GPUVAddr addr) const;
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template u64 MemoryManager::Read<u64>(GPUVAddr addr) const;
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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 gpu_addr) {
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if (!GetPageEntry(gpu_addr).IsValid()) {
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return {};
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}
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const auto address{GpuToCpuAddress(gpu_addr)};
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if (!address) {
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return {};
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}
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return system.Memory().GetPointer(*address);
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}
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const u8* MemoryManager::GetPointer(GPUVAddr gpu_addr) const {
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if (!GetPageEntry(gpu_addr).IsValid()) {
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return {};
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}
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const auto address{GpuToCpuAddress(gpu_addr)};
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if (!address) {
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return {};
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}
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return system.Memory().GetPointer(*address);
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}
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void MemoryManager::ReadBlock(GPUVAddr gpu_src_addr, void* dest_buffer, std::size_t size) const {
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std::size_t remaining_size{size};
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std::size_t page_index{gpu_src_addr >> page_bits};
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std::size_t page_offset{gpu_src_addr & page_mask};
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while (remaining_size > 0) {
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const std::size_t copy_amount{
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std::min(static_cast<std::size_t>(page_size) - page_offset, remaining_size)};
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if (const auto page_addr{GpuToCpuAddress(page_index << page_bits)}; page_addr) {
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const auto src_addr{*page_addr + page_offset};
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// Flush must happen on the rasterizer interface, such that memory is always synchronous
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// when it is read (even when in asynchronous GPU mode). Fixes Dead Cells title menu.
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rasterizer.FlushRegion(src_addr, copy_amount);
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system.Memory().ReadBlockUnsafe(src_addr, dest_buffer, copy_amount);
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}
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page_index++;
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page_offset = 0;
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dest_buffer = static_cast<u8*>(dest_buffer) + copy_amount;
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remaining_size -= copy_amount;
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}
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}
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void MemoryManager::ReadBlockUnsafe(GPUVAddr gpu_src_addr, void* dest_buffer,
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const std::size_t size) const {
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std::size_t remaining_size{size};
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std::size_t page_index{gpu_src_addr >> page_bits};
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std::size_t page_offset{gpu_src_addr & page_mask};
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while (remaining_size > 0) {
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const std::size_t copy_amount{
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std::min(static_cast<std::size_t>(page_size) - page_offset, remaining_size)};
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if (const auto page_addr{GpuToCpuAddress(page_index << page_bits)}; page_addr) {
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const auto src_addr{*page_addr + page_offset};
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system.Memory().ReadBlockUnsafe(src_addr, dest_buffer, copy_amount);
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} else {
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std::memset(dest_buffer, 0, copy_amount);
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}
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page_index++;
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page_offset = 0;
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dest_buffer = static_cast<u8*>(dest_buffer) + copy_amount;
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remaining_size -= copy_amount;
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}
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}
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void MemoryManager::WriteBlock(GPUVAddr gpu_dest_addr, const void* src_buffer, std::size_t size) {
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std::size_t remaining_size{size};
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std::size_t page_index{gpu_dest_addr >> page_bits};
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std::size_t page_offset{gpu_dest_addr & page_mask};
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while (remaining_size > 0) {
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const std::size_t copy_amount{
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std::min(static_cast<std::size_t>(page_size) - page_offset, remaining_size)};
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if (const auto page_addr{GpuToCpuAddress(page_index << page_bits)}; page_addr) {
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const auto dest_addr{*page_addr + page_offset};
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// Invalidate must happen on the rasterizer interface, such that memory is always
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// synchronous when it is written (even when in asynchronous GPU mode).
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rasterizer.InvalidateRegion(dest_addr, copy_amount);
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system.Memory().WriteBlockUnsafe(dest_addr, src_buffer, copy_amount);
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}
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page_index++;
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page_offset = 0;
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src_buffer = static_cast<const u8*>(src_buffer) + copy_amount;
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remaining_size -= copy_amount;
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}
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}
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void MemoryManager::WriteBlockUnsafe(GPUVAddr gpu_dest_addr, const void* src_buffer,
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std::size_t size) {
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std::size_t remaining_size{size};
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std::size_t page_index{gpu_dest_addr >> page_bits};
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std::size_t page_offset{gpu_dest_addr & page_mask};
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while (remaining_size > 0) {
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const std::size_t copy_amount{
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std::min(static_cast<std::size_t>(page_size) - page_offset, remaining_size)};
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if (const auto page_addr{GpuToCpuAddress(page_index << page_bits)}; page_addr) {
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const auto dest_addr{*page_addr + page_offset};
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system.Memory().WriteBlockUnsafe(dest_addr, src_buffer, copy_amount);
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}
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page_index++;
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page_offset = 0;
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src_buffer = static_cast<const u8*>(src_buffer) + copy_amount;
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remaining_size -= copy_amount;
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}
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}
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void MemoryManager::CopyBlock(GPUVAddr gpu_dest_addr, GPUVAddr gpu_src_addr, std::size_t size) {
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std::vector<u8> tmp_buffer(size);
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ReadBlock(gpu_src_addr, tmp_buffer.data(), size);
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WriteBlock(gpu_dest_addr, tmp_buffer.data(), size);
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}
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void MemoryManager::CopyBlockUnsafe(GPUVAddr gpu_dest_addr, GPUVAddr gpu_src_addr,
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std::size_t size) {
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std::vector<u8> tmp_buffer(size);
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ReadBlockUnsafe(gpu_src_addr, tmp_buffer.data(), size);
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WriteBlockUnsafe(gpu_dest_addr, tmp_buffer.data(), size);
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}
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bool MemoryManager::IsGranularRange(GPUVAddr gpu_addr, std::size_t size) const {
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const auto cpu_addr{GpuToCpuAddress(gpu_addr)};
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if (!cpu_addr) {
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return false;
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}
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const std::size_t page{(*cpu_addr & Core::Memory::PAGE_MASK) + size};
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return page <= Core::Memory::PAGE_SIZE;
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}
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} // namespace Tegra
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