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/*
* Copyright (C) 2018-2021 Intel Corporation
*
* SPDX-License-Identifier: MIT
*
*/
#include "shared/source/memory_manager/address_mapper.h"
#include "shared/source/helpers/aligned_memory.h"
#include <inttypes.h>
#include <iostream>
namespace NEO {
AddressMapper::AddressMapper() : nextPage(1) {
}
AddressMapper::~AddressMapper() {
for (auto &m : mapping)
delete m;
}
uint32_t AddressMapper::map(void *vm, size_t size) {
void *aligned = alignDown(vm, MemoryConstants::pageSize);
size_t alignedSize = alignSizeWholePage(vm, size);
auto it = mapping.begin();
for (; it != mapping.end(); it++) {
if ((*it)->vm == aligned) {
if ((*it)->size == alignedSize) {
return (*it)->ggtt;
}
break;
}
}
if (it != mapping.end()) {
delete *it;
mapping.erase(it);
}
uint32_t numPages = static_cast<uint32_t>(alignedSize / MemoryConstants::pageSize);
auto tmp = nextPage.fetch_add(numPages);
MapInfo *m = new MapInfo;
m->vm = aligned;
m->size = alignedSize;
m->ggtt = static_cast<uint32_t>(tmp * MemoryConstants::pageSize);
mapping.push_back(m);
return m->ggtt;
}
void AddressMapper::unmap(void *vm) {
void *aligned = alignDown(vm, MemoryConstants::pageSize);
auto it = mapping.begin();
for (; it != mapping.end(); it++) {
if ((*it)->vm == aligned) {
break;
}
}
if (it != mapping.end()) {
delete *it;
mapping.erase(it);
}
}
} // namespace NEO
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