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// Copyright 2018 yuzu Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include <algorithm>
#include <optional>
#include <tuple>
#include <vector>
#include "common/alignment.h"
#include "common/assert.h"
#include "common/common_types.h"
#include "common/logging/log.h"
#include "video_core/renderer_vulkan/vk_device.h"
#include "video_core/renderer_vulkan/vk_memory_manager.h"
#include "video_core/vulkan_common/vulkan_wrapper.h"
namespace Vulkan {
namespace {
u64 GetAllocationChunkSize(u64 required_size) {
static constexpr u64 sizes[] = {16ULL << 20, 32ULL << 20, 64ULL << 20, 128ULL << 20};
auto it = std::lower_bound(std::begin(sizes), std::end(sizes), required_size);
return it != std::end(sizes) ? *it : Common::AlignUp(required_size, 256ULL << 20);
}
} // Anonymous namespace
class VKMemoryAllocation final {
public:
explicit VKMemoryAllocation(const VKDevice& device_, vk::DeviceMemory memory_,
VkMemoryPropertyFlags properties_, u64 allocation_size_, u32 type_)
: device{device_}, memory{std::move(memory_)}, properties{properties_},
allocation_size{allocation_size_}, shifted_type{ShiftType(type_)} {}
VKMemoryCommit Commit(VkDeviceSize commit_size, VkDeviceSize alignment) {
auto found = TryFindFreeSection(free_iterator, allocation_size,
static_cast<u64>(commit_size), static_cast<u64>(alignment));
if (!found) {
found = TryFindFreeSection(0, free_iterator, static_cast<u64>(commit_size),
static_cast<u64>(alignment));
if (!found) {
// Signal out of memory, it'll try to do more allocations.
return nullptr;
}
}
auto commit = std::make_unique<VKMemoryCommitImpl>(device, this, memory, *found,
*found + commit_size);
commits.push_back(commit.get());
// Last commit's address is highly probable to be free.
free_iterator = *found + commit_size;
return commit;
}
void Free(const VKMemoryCommitImpl* commit) {
ASSERT(commit);
const auto it = std::find(std::begin(commits), std::end(commits), commit);
if (it == commits.end()) {
UNREACHABLE_MSG("Freeing unallocated commit!");
return;
}
commits.erase(it);
}
/// Returns whether this allocation is compatible with the arguments.
bool IsCompatible(VkMemoryPropertyFlags wanted_properties, u32 type_mask) const {
return (wanted_properties & properties) && (type_mask & shifted_type) != 0;
}
private:
static constexpr u32 ShiftType(u32 type) {
return 1U << type;
}
/// A memory allocator, it may return a free region between "start" and "end" with the solicited
/// requirements.
std::optional<u64> TryFindFreeSection(u64 start, u64 end, u64 size, u64 alignment) const {
u64 iterator = Common::AlignUp(start, alignment);
while (iterator + size <= end) {
const u64 try_left = iterator;
const u64 try_right = try_left + size;
bool overlap = false;
for (const auto& commit : commits) {
const auto [commit_left, commit_right] = commit->interval;
if (try_left < commit_right && commit_left < try_right) {
// There's an overlap, continue the search where the overlapping commit ends.
iterator = Common::AlignUp(commit_right, alignment);
overlap = true;
break;
}
}
if (!overlap) {
// A free address has been found.
return try_left;
}
}
// No free regions where found, return an empty optional.
return std::nullopt;
}
const VKDevice& device; ///< Vulkan device.
const vk::DeviceMemory memory; ///< Vulkan memory allocation handler.
const VkMemoryPropertyFlags properties; ///< Vulkan properties.
const u64 allocation_size; ///< Size of this allocation.
const u32 shifted_type; ///< Stored Vulkan type of this allocation, shifted.
/// Hints where the next free region is likely going to be.
u64 free_iterator{};
/// Stores all commits done from this allocation.
std::vector<const VKMemoryCommitImpl*> commits;
};
VKMemoryManager::VKMemoryManager(const VKDevice& device_)
: device{device_}, properties{device_.GetPhysical().GetMemoryProperties()} {}
VKMemoryManager::~VKMemoryManager() = default;
VKMemoryCommit VKMemoryManager::Commit(const VkMemoryRequirements& requirements,
bool host_visible) {
const u64 chunk_size = GetAllocationChunkSize(requirements.size);
// When a host visible commit is asked, search for host visible and coherent, otherwise search
// for a fast device local type.
const VkMemoryPropertyFlags wanted_properties =
host_visible ? VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT | VK_MEMORY_PROPERTY_HOST_COHERENT_BIT
: VK_MEMORY_PROPERTY_DEVICE_LOCAL_BIT;
if (auto commit = TryAllocCommit(requirements, wanted_properties)) {
return commit;
}
// Commit has failed, allocate more memory.
if (!AllocMemory(wanted_properties, requirements.memoryTypeBits, chunk_size)) {
// TODO(Rodrigo): Handle these situations in some way like flushing to guest memory.
// Allocation has failed, panic.
UNREACHABLE_MSG("Ran out of VRAM!");
return {};
}
// Commit again, this time it won't fail since there's a fresh allocation above. If it does,
// there's a bug.
auto commit = TryAllocCommit(requirements, wanted_properties);
ASSERT(commit);
return commit;
}
VKMemoryCommit VKMemoryManager::Commit(const vk::Buffer& buffer, bool host_visible) {
auto commit = Commit(device.GetLogical().GetBufferMemoryRequirements(*buffer), host_visible);
buffer.BindMemory(commit->GetMemory(), commit->GetOffset());
return commit;
}
VKMemoryCommit VKMemoryManager::Commit(const vk::Image& image, bool host_visible) {
auto commit = Commit(device.GetLogical().GetImageMemoryRequirements(*image), host_visible);
image.BindMemory(commit->GetMemory(), commit->GetOffset());
return commit;
}
bool VKMemoryManager::AllocMemory(VkMemoryPropertyFlags wanted_properties, u32 type_mask,
u64 size) {
const u32 type = [&] {
for (u32 type_index = 0; type_index < properties.memoryTypeCount; ++type_index) {
const auto flags = properties.memoryTypes[type_index].propertyFlags;
if ((type_mask & (1U << type_index)) && (flags & wanted_properties)) {
// The type matches in type and in the wanted properties.
return type_index;
}
}
UNREACHABLE_MSG("Couldn't find a compatible memory type!");
return 0U;
}();
// Try to allocate found type.
vk::DeviceMemory memory = device.GetLogical().TryAllocateMemory({
.sType = VK_STRUCTURE_TYPE_MEMORY_ALLOCATE_INFO,
.pNext = nullptr,
.allocationSize = size,
.memoryTypeIndex = type,
});
if (!memory) {
LOG_CRITICAL(Render_Vulkan, "Device allocation failed!");
return false;
}
allocations.push_back(std::make_unique<VKMemoryAllocation>(device, std::move(memory),
wanted_properties, size, type));
return true;
}
VKMemoryCommit VKMemoryManager::TryAllocCommit(const VkMemoryRequirements& requirements,
VkMemoryPropertyFlags wanted_properties) {
for (auto& allocation : allocations) {
if (!allocation->IsCompatible(wanted_properties, requirements.memoryTypeBits)) {
continue;
}
if (auto commit = allocation->Commit(requirements.size, requirements.alignment)) {
return commit;
}
}
return {};
}
VKMemoryCommitImpl::VKMemoryCommitImpl(const VKDevice& device_, VKMemoryAllocation* allocation_,
const vk::DeviceMemory& memory_, u64 begin_, u64 end_)
: device{device_}, memory{memory_}, interval{begin_, end_}, allocation{allocation_} {}
VKMemoryCommitImpl::~VKMemoryCommitImpl() {
allocation->Free(this);
}
MemoryMap VKMemoryCommitImpl::Map(u64 size, u64 offset_) const {
return MemoryMap(this, std::span<u8>(memory.Map(interval.first + offset_, size), size));
}
void VKMemoryCommitImpl::Unmap() const {
memory.Unmap();
}
MemoryMap VKMemoryCommitImpl::Map() const {
return Map(interval.second - interval.first);
}
} // namespace Vulkan
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