/*
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* Copyright (C) 2016 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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*/
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#define LOG_TAG "HidlMemoryCache"
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#include "HidlMemoryCache.h"
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#include <android/hidl/memory/1.0/IMemory.h>
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#include <android/hidl/memory/token/1.0/IMemoryToken.h>
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#include <hidlmemory/mapping.h>
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#include <sys/mman.h>
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#include <utils/Log.h>
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namespace android {
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namespace hardware {
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using IMemoryToken = ::android::hidl::memory::token::V1_0::IMemoryToken;
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using IMemory = ::android::hidl::memory::V1_0::IMemory;
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class MemoryDecorator : public virtual IMemory {
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public:
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MemoryDecorator(const sp<IMemory>& heap) : mHeap(heap) {}
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virtual ~MemoryDecorator() {}
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Return<void> update() override { return mHeap->update(); }
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Return<void> read() override { return mHeap->read(); }
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Return<void> updateRange(uint64_t start, uint64_t length) override {
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return mHeap->updateRange(start, length);
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}
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Return<void> readRange(uint64_t start, uint64_t length) override {
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return mHeap->readRange(start, length);
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}
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Return<void> commit() override { return mHeap->commit(); }
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Return<void*> getPointer() override { return mHeap->getPointer(); }
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Return<uint64_t> getSize() override { return mHeap->getSize(); }
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protected:
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sp<IMemory> mHeap;
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};
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class MemoryCacheable : public virtual MemoryDecorator {
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public:
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MemoryCacheable(const sp<IMemory>& heap, sp<IMemoryToken> key)
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: MemoryDecorator(heap), mKey(key) {}
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virtual ~MemoryCacheable() { HidlMemoryCache::getInstance()->flush(mKey); }
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protected:
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sp<IMemoryToken> mKey;
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};
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class MemoryBlockImpl : public virtual IMemory {
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public:
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MemoryBlockImpl(const sp<IMemory>& heap, uint64_t size, uint64_t offset)
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: mHeap(heap), mSize(size), mOffset(offset), mHeapSize(heap->getSize()) {}
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bool validRange(uint64_t start, uint64_t length) {
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return (start + length <= mSize) && (start + length >= start) &&
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(mOffset + mSize <= mHeapSize);
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}
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Return<void> readRange(uint64_t start, uint64_t length) override {
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if (!validRange(start, length)) {
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ALOGE("IMemoryBlock::readRange: out of range");
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return Void();
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}
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return mHeap->readRange(mOffset + start, length);
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}
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Return<void> updateRange(uint64_t start, uint64_t length) override {
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if (!validRange(start, length)) {
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ALOGE("IMemoryBlock::updateRange: out of range");
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return Void();
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}
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return mHeap->updateRange(mOffset + start, length);
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}
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Return<void> read() override { return this->readRange(0, mSize); }
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Return<void> update() override { return this->updateRange(0, mSize); }
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Return<void> commit() override { return mHeap->commit(); }
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Return<uint64_t> getSize() override { return mSize; }
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Return<void*> getPointer() override {
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void* p = mHeap->getPointer();
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return (static_cast<char*>(p) + mOffset);
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}
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protected:
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sp<IMemory> mHeap;
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uint64_t mSize;
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uint64_t mOffset;
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uint64_t mHeapSize;
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};
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sp<HidlMemoryCache> HidlMemoryCache::getInstance() {
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static sp<HidlMemoryCache> instance = new HidlMemoryCache();
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return instance;
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}
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sp<IMemory> HidlMemoryCache::fillLocked(const sp<IMemoryToken>& key) {
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sp<IMemory> memory = nullptr;
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Return<void> ret = key->get(
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[&](const hidl_memory& mem) { memory = new MemoryCacheable(mapMemory(mem), key); });
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if (!ret.isOk()) {
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ALOGE("HidlMemoryCache::fill: cannot IMemoryToken::get.");
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return nullptr;
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}
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mCached[key] = memory;
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return memory;
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}
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sp<IMemory> HidlMemoryCache::map(const MemoryBlock& memblk) {
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sp<IMemoryToken> token = memblk.token;
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sp<IMemory> heap = fetch(token);
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if (heap == nullptr) {
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return nullptr;
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}
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return new MemoryBlockImpl(heap, memblk.size, memblk.offset);
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}
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} // namespace hardware
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} // namespace android
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