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/*
* Copyright (C) 2021-2025 Intel Corporation
*
* SPDX-License-Identifier: MIT
*
*/
#include "shared/source/memory_manager/allocations_list.h"
#include "shared/source/command_stream/command_stream_receiver.h"
#include "shared/source/command_stream/task_count_helper.h"
#include "shared/source/device/device.h"
#include "shared/source/os_interface/os_context.h"
namespace {
struct ReusableAllocationRequirements {
ReusableAllocationRequirements() = delete;
ReusableAllocationRequirements(NEO::CommandStreamReceiver *csr, const void *requiredPtr, size_t requiredMinimalSize, NEO::AllocationType allocationType, bool forceSystemMemoryFlag)
: requiredPtr(requiredPtr), requiredMinimalSize(requiredMinimalSize), allocationType(allocationType), forceSystemMemoryFlag(forceSystemMemoryFlag) {
if (csr) {
csrTagAddress = csr->getTagAddress();
contextId = csr->getOsContext().getContextId();
rootDeviceIndex = csr->getRootDeviceIndex();
deviceBitfield = csr->getOsContext().getDeviceBitfield();
tagOffset = csr->getImmWritePostSyncWriteOffset();
}
}
const void *requiredPtr = nullptr;
size_t requiredMinimalSize = 0;
volatile TagAddressType *csrTagAddress = nullptr;
NEO::AllocationType allocationType = NEO::AllocationType::unknown;
NEO::DeviceBitfield deviceBitfield = 1;
uint32_t contextId = std::numeric_limits<uint32_t>::max();
uint32_t rootDeviceIndex = 0;
uint32_t tagOffset = 0;
bool forceSystemMemoryFlag = false;
};
bool checkTagAddressReady(ReusableAllocationRequirements *requirements, NEO::GraphicsAllocation *gfxAllocation) {
auto tagAddress = requirements->csrTagAddress;
auto taskCount = gfxAllocation->getTaskCount(requirements->contextId);
for (uint32_t count = 0; count < requirements->deviceBitfield.count(); count++) {
if (*tagAddress < taskCount) {
return false;
}
tagAddress = ptrOffset(tagAddress, requirements->tagOffset);
}
return true;
}
} // namespace
namespace NEO {
AllocationsList::AllocationsList(AllocationUsage allocationUsage)
: allocationUsage(allocationUsage) {}
std::unique_ptr<GraphicsAllocation> AllocationsList::detachAllocation(size_t requiredMinimalSize, const void *requiredPtr, CommandStreamReceiver *commandStreamReceiver, AllocationType allocationType) {
return this->detachAllocation(requiredMinimalSize, requiredPtr, false, commandStreamReceiver, allocationType);
}
std::unique_ptr<GraphicsAllocation> AllocationsList::detachAllocation(size_t requiredMinimalSize, const void *requiredPtr, bool forceSystemMemoryFlag, CommandStreamReceiver *commandStreamReceiver, AllocationType allocationType) {
ReusableAllocationRequirements req(commandStreamReceiver, requiredPtr, requiredMinimalSize, allocationType, forceSystemMemoryFlag);
GraphicsAllocation *a = nullptr;
GraphicsAllocation *retAlloc = processLocked<AllocationsList, &AllocationsList::detachAllocationImpl>(a, static_cast<void *>(&req));
return std::unique_ptr<GraphicsAllocation>(retAlloc);
}
GraphicsAllocation *AllocationsList::detachAllocationImpl(GraphicsAllocation *, void *data) {
ReusableAllocationRequirements *req = static_cast<ReusableAllocationRequirements *>(data);
auto *curr = head;
while (curr != nullptr) {
if ((req->allocationType == curr->getAllocationType()) &&
(curr->getUnderlyingBufferSize() >= req->requiredMinimalSize) &&
(curr->storageInfo.systemMemoryForced == req->forceSystemMemoryFlag)) {
if (req->csrTagAddress == nullptr) {
return removeOneImpl(curr, nullptr);
}
bool usageMatch = (this->allocationUsage == TEMPORARY_ALLOCATION || checkTagAddressReady(req, curr));
bool ptrMatch = (req->requiredPtr == nullptr || req->requiredPtr == curr->getUnderlyingBuffer());
bool tileMatch = (req->deviceBitfield == curr->storageInfo.subDeviceBitfield) || (curr->storageInfo.subDeviceBitfield == 0);
bool placementMatch = (req->rootDeviceIndex == curr->getRootDeviceIndex()) && tileMatch;
if (usageMatch && ptrMatch && placementMatch) {
if (this->allocationUsage == TEMPORARY_ALLOCATION) {
// We may not have proper task count yet, so set notReady to avoid releasing in a different thread
curr->updateTaskCount(CompletionStamp::notReady, req->contextId);
}
return removeOneImpl(curr, nullptr);
}
}
curr = curr->next;
}
return nullptr;
}
void AllocationsList::freeAllGraphicsAllocations(Device *neoDevice) {
auto *curr = head;
while (curr != nullptr) {
auto currNext = curr->next;
neoDevice->getMemoryManager()->freeGraphicsMemory(curr);
curr = currNext;
}
head = nullptr;
tail = nullptr;
}
} // namespace NEO
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