82 lines
2.5 KiB
C++
82 lines
2.5 KiB
C++
/*
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* Copyright (c) 2017 - 2018, Intel Corporation
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included
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* in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include "runtime/helpers/aligned_memory.h"
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#include "runtime/memory_manager/address_mapper.h"
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#include <inttypes.h>
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#include <iostream>
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namespace OCLRT {
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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 OCLRT
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