blob: abd53da6f16fd217dbdb7d00cebff511ab7fdad2 [file] [log] [blame]
// Copyright 2017 The Dawn Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "dawn_native/vulkan/MemoryAllocator.h"
#include "dawn_native/vulkan/DeviceVk.h"
#include "dawn_native/vulkan/FencedDeleter.h"
namespace dawn_native { namespace vulkan {
DeviceMemoryAllocation::~DeviceMemoryAllocation() {
ASSERT(mMemory == VK_NULL_HANDLE);
}
VkDeviceMemory DeviceMemoryAllocation::GetMemory() const {
return mMemory;
}
size_t DeviceMemoryAllocation::GetMemoryOffset() const {
return mOffset;
}
uint8_t* DeviceMemoryAllocation::GetMappedPointer() const {
return mMappedPointer;
}
MemoryAllocator::MemoryAllocator(Device* device) : mDevice(device) {
}
MemoryAllocator::~MemoryAllocator() {
}
int MemoryAllocator::FindBestTypeIndex(VkMemoryRequirements requirements, bool mappable) {
const VulkanDeviceInfo& info = mDevice->GetDeviceInfo();
// Find a suitable memory type for this allocation
int bestType = -1;
for (size_t i = 0; i < info.memoryTypes.size(); ++i) {
// Resource must support this memory type
if ((requirements.memoryTypeBits & (1 << i)) == 0) {
continue;
}
// Mappable resource must be host visible
if (mappable &&
(info.memoryTypes[i].propertyFlags & VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT) == 0) {
continue;
}
// Mappable must also be host coherent.
if (mappable &&
(info.memoryTypes[i].propertyFlags & VK_MEMORY_PROPERTY_HOST_COHERENT_BIT) == 0) {
continue;
}
// Found the first candidate memory type
if (bestType == -1) {
bestType = static_cast<int>(i);
continue;
}
// For non-mappable resources, favor device local memory.
if (!mappable) {
if ((info.memoryTypes[bestType].propertyFlags &
VK_MEMORY_PROPERTY_DEVICE_LOCAL_BIT) == 0 &&
(info.memoryTypes[i].propertyFlags & VK_MEMORY_PROPERTY_DEVICE_LOCAL_BIT) !=
0) {
bestType = static_cast<int>(i);
continue;
}
}
// All things equal favor the memory in the biggest heap
VkDeviceSize bestTypeHeapSize =
info.memoryHeaps[info.memoryTypes[bestType].heapIndex].size;
VkDeviceSize candidateHeapSize = info.memoryHeaps[info.memoryTypes[i].heapIndex].size;
if (candidateHeapSize > bestTypeHeapSize) {
bestType = static_cast<int>(i);
continue;
}
}
return bestType;
}
bool MemoryAllocator::Allocate(VkMemoryRequirements requirements,
bool mappable,
DeviceMemoryAllocation* allocation) {
int bestType = FindBestTypeIndex(requirements, mappable);
// TODO(cwallez@chromium.org): I think the Vulkan spec guarantees this should never happen
if (bestType == -1) {
ASSERT(false);
return false;
}
VkMemoryAllocateInfo allocateInfo;
allocateInfo.sType = VK_STRUCTURE_TYPE_MEMORY_ALLOCATE_INFO;
allocateInfo.pNext = nullptr;
allocateInfo.allocationSize = requirements.size;
allocateInfo.memoryTypeIndex = static_cast<uint32_t>(bestType);
VkDeviceMemory allocatedMemory = VK_NULL_HANDLE;
if (mDevice->fn.AllocateMemory(mDevice->GetVkDevice(), &allocateInfo, nullptr,
&allocatedMemory) != VK_SUCCESS) {
return false;
}
void* mappedPointer = nullptr;
if (mappable) {
if (mDevice->fn.MapMemory(mDevice->GetVkDevice(), allocatedMemory, 0, requirements.size,
0, &mappedPointer) != VK_SUCCESS) {
return false;
}
}
allocation->mMemory = allocatedMemory;
allocation->mOffset = 0;
allocation->mMappedPointer = static_cast<uint8_t*>(mappedPointer);
return true;
}
void MemoryAllocator::Free(DeviceMemoryAllocation* allocation) {
mDevice->GetFencedDeleter()->DeleteWhenUnused(allocation->mMemory);
allocation->mMemory = VK_NULL_HANDLE;
allocation->mOffset = 0;
allocation->mMappedPointer = nullptr;
}
void MemoryAllocator::Tick(Serial) {
}
}} // namespace dawn_native::vulkan