139 lines
3.8 KiB
C++
139 lines
3.8 KiB
C++
// Copyright 2019 The Android Open Source Project
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include "host-common/HostmemIdMapping.h"
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#include <utility>
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using android::base::ManagedDescriptor;
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namespace android {
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namespace emulation {
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using Id = uint64_t;
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// static
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const Id HostmemIdMapping::kInvalidHostmemId = 0;
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static HostmemIdMapping* sMapping() {
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static HostmemIdMapping* s = new HostmemIdMapping;
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return s;
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}
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// static
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HostmemIdMapping* HostmemIdMapping::get() {
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return sMapping();
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}
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// TODO: Add registerHostmemFixed version that takes a predetermined id,
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// for snapshots
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Id HostmemIdMapping::add(const struct MemEntry *entry) {
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if (entry->hva == 0 || entry->size == 0) return kInvalidHostmemId;
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Id wantedId;
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if (entry->register_fixed) {
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wantedId = entry->fixed_id;
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mCurrentId = wantedId + 1;
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} else {
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wantedId = mCurrentId++;
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}
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HostmemIdMapping::Entry hostmem_entry;
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hostmem_entry.id = wantedId;
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hostmem_entry.hva = entry->hva;
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hostmem_entry.size = entry->size;
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hostmem_entry.caching = entry->caching;
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mEntries.set(wantedId, hostmem_entry);
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return wantedId;
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}
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void HostmemIdMapping::remove(Id id) {
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mEntries.erase(id);
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}
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void HostmemIdMapping::addMapping(Id id, const struct MemEntry *entry) {
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HostmemIdMapping::Entry hostmem_entry;
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hostmem_entry.id = id;
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hostmem_entry.hva = entry->hva;
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hostmem_entry.size = entry->size;
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hostmem_entry.caching = entry->caching;
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mEntries.set(id, hostmem_entry);
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}
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void HostmemIdMapping::addDescriptorInfo(Id id, ManagedDescriptor descriptor,
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uint32_t handleType, uint32_t caching,
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std::optional<VulkanInfo> vulkanInfoOpt) {
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struct ManagedDescriptorInfo info =
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{
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.descriptor = std::move(descriptor),
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.handleType = handleType,
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.caching = caching,
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.vulkanInfoOpt = std::move(vulkanInfoOpt),
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};
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mDescriptorInfos.insert(std::make_pair(id, std::move(info)));
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}
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std::optional<ManagedDescriptorInfo> HostmemIdMapping::removeDescriptorInfo(Id id) {
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auto found = mDescriptorInfos.find(id);
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if (found != mDescriptorInfos.end()) {
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std::optional<ManagedDescriptorInfo> ret = std::move(found->second);
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mDescriptorInfos.erase(found);
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return ret;
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}
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return std::nullopt;
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}
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HostmemIdMapping::Entry HostmemIdMapping::get(Id id) const {
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const HostmemIdMapping::Entry badEntry {
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kInvalidHostmemId, 0, 0,
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};
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if (kInvalidHostmemId == id) return badEntry;
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auto entry = mEntries.get(id);
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if (!entry) return badEntry;
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return *entry;
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}
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void HostmemIdMapping::clear() {
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mEntries.clear();
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}
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} // namespace android
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} // namespace emulation
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// C interface for use with vm operations
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extern "C" {
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uint64_t android_emulation_hostmem_register(const struct MemEntry *entry) {
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return static_cast<uint64_t>(
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android::emulation::HostmemIdMapping::get()->add(entry));
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}
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void android_emulation_hostmem_unregister(uint64_t id) {
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android::emulation::HostmemIdMapping::get()->remove(id);
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}
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HostmemEntry android_emulation_hostmem_get_info(uint64_t id) {
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return static_cast<HostmemEntry>(
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android::emulation::HostmemIdMapping::get()->get(id));
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}
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} // extern "C"
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