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nvdrv: Add MemoryManager class to track GPU memory.

This commit is contained in:
bunnei 2018-02-07 21:54:35 -05:00
parent 196f8dff08
commit c711253798
3 changed files with 162 additions and 0 deletions

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@ -137,6 +137,8 @@ add_library(core STATIC
hle/service/nvdrv/devices/nvmap.h
hle/service/nvdrv/interface.cpp
hle/service/nvdrv/interface.h
hle/service/nvdrv/memory_manager.cpp
hle/service/nvdrv/memory_manager.h
hle/service/nvdrv/nvdrv.cpp
hle/service/nvdrv/nvdrv.h
hle/service/nvdrv/nvmemp.cpp

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@ -0,0 +1,112 @@
// Copyright 2018 yuzu emulator team
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include "common/assert.h"
#include "core/hle/service/nvdrv/memory_manager.h"
namespace Service {
namespace Nvidia {
PAddr MemoryManager::AllocateSpace(u64 size, u64 align) {
boost::optional<PAddr> paddr = FindFreeBlock(size, align);
ASSERT(paddr);
for (u64 offset = 0; offset < size; offset += Memory::PAGE_SIZE) {
PageSlot(*paddr + offset) = static_cast<u64>(PageStatus::Allocated);
}
return *paddr;
}
PAddr MemoryManager::AllocateSpace(PAddr paddr, u64 size, u64 align) {
for (u64 offset = 0; offset < size; offset += Memory::PAGE_SIZE) {
if (IsPageMapped(paddr + offset)) {
return AllocateSpace(size, align);
}
}
for (u64 offset = 0; offset < size; offset += Memory::PAGE_SIZE) {
PageSlot(paddr + offset) = static_cast<u64>(PageStatus::Allocated);
}
return paddr;
}
PAddr MemoryManager::MapBufferEx(VAddr vaddr, u64 size) {
vaddr &= ~Memory::PAGE_MASK;
boost::optional<PAddr> paddr = FindFreeBlock(size);
ASSERT(paddr);
for (u64 offset = 0; offset < size; offset += Memory::PAGE_SIZE) {
PageSlot(*paddr + offset) = vaddr + offset;
}
return *paddr;
}
PAddr MemoryManager::MapBufferEx(VAddr vaddr, PAddr paddr, u64 size) {
vaddr &= ~Memory::PAGE_MASK;
paddr &= ~Memory::PAGE_MASK;
for (u64 offset = 0; offset < size; offset += Memory::PAGE_SIZE) {
if (PageSlot(paddr + offset) != static_cast<u64>(PageStatus::Allocated)) {
return MapBufferEx(vaddr, size);
}
}
for (u64 offset = 0; offset < size; offset += Memory::PAGE_SIZE) {
PageSlot(paddr + offset) = vaddr + offset;
}
return paddr;
}
boost::optional<PAddr> MemoryManager::FindFreeBlock(u64 size, u64 align) {
PAddr paddr{};
u64 free_space{};
align = (align + Memory::PAGE_MASK) & ~Memory::PAGE_MASK;
while (paddr + free_space < MAX_ADDRESS) {
if (!IsPageMapped(paddr + free_space)) {
free_space += Memory::PAGE_SIZE;
if (free_space >= size) {
return paddr;
}
} else {
paddr += free_space + Memory::PAGE_SIZE;
free_space = 0;
const u64 remainder{paddr % align};
if (!remainder) {
paddr = (paddr - remainder) + align;
}
}
}
return {};
}
VAddr MemoryManager::PhysicalToVirtualAddress(PAddr paddr) {
VAddr base_addr = PageSlot(paddr);
ASSERT(base_addr != static_cast<u64>(PageStatus::Unmapped));
return base_addr + (paddr & Memory::PAGE_MASK);
}
bool MemoryManager::IsPageMapped(PAddr paddr) {
return PageSlot(paddr) != static_cast<u64>(PageStatus::Unmapped);
}
VAddr& MemoryManager::PageSlot(PAddr paddr) {
auto& block = page_table[(paddr >> (Memory::PAGE_BITS + PAGE_TABLE_BITS)) & PAGE_TABLE_MASK];
if (!block) {
block = std::make_unique<PageBlock>();
for (unsigned index = 0; index < PAGE_BLOCK_SIZE; index++) {
(*block)[index] = static_cast<u64>(PageStatus::Unmapped);
}
}
return (*block)[(paddr >> Memory::PAGE_BITS) & PAGE_BLOCK_MASK];
}
} // namespace Nvidia
} // namespace Service

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@ -0,0 +1,48 @@
// Copyright 2018 yuzu emulator team
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#pragma once
#include <array>
#include <memory>
#include "common/common_types.h"
#include "core/memory.h"
namespace Service {
namespace Nvidia {
class MemoryManager final {
public:
MemoryManager() = default;
PAddr AllocateSpace(u64 size, u64 align);
PAddr AllocateSpace(PAddr paddr, u64 size, u64 align);
PAddr MapBufferEx(VAddr vaddr, u64 size);
PAddr MapBufferEx(VAddr vaddr, PAddr paddr, u64 size);
VAddr PhysicalToVirtualAddress(PAddr paddr);
private:
boost::optional<PAddr> FindFreeBlock(u64 size, u64 align = 1);
bool IsPageMapped(PAddr paddr);
VAddr& PageSlot(PAddr paddr);
enum class PageStatus : u64 {
Unmapped = 0xFFFFFFFFFFFFFFFFULL,
Allocated = 0xFFFFFFFFFFFFFFFEULL,
};
static constexpr u64 MAX_ADDRESS{0x10000000000ULL};
static constexpr u64 PAGE_TABLE_BITS{14};
static constexpr u64 PAGE_TABLE_SIZE{1 << PAGE_TABLE_BITS};
static constexpr u64 PAGE_TABLE_MASK{PAGE_TABLE_SIZE - 1};
static constexpr u64 PAGE_BLOCK_BITS{14};
static constexpr u64 PAGE_BLOCK_SIZE{1 << PAGE_BLOCK_BITS};
static constexpr u64 PAGE_BLOCK_MASK{PAGE_BLOCK_SIZE - 1};
using PageBlock = std::array<VAddr, PAGE_BLOCK_SIZE>;
std::array<std::unique_ptr<PageBlock>, PAGE_TABLE_SIZE> page_table{};
};
} // namespace Nvidia
} // namespace Service