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