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/*
* Copyright (C) 2016 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#define LOG_TAG "HidlMemoryCache"
#include "HidlMemoryCache.h"
#include <android/hidl/memory/1.0/IMemory.h>
#include <android/hidl/memory/token/1.0/IMemoryToken.h>
#include <hidlmemory/mapping.h>
#include <sys/mman.h>
#include <utils/Log.h>
namespace android {
namespace hardware {
using IMemoryToken = ::android::hidl::memory::token::V1_0::IMemoryToken;
using IMemory = ::android::hidl::memory::V1_0::IMemory;
class MemoryDecorator : public virtual IMemory {
public:
MemoryDecorator(const sp<IMemory>& heap) : mHeap(heap) {}
virtual ~MemoryDecorator() {}
Return<void> update() override { return mHeap->update(); }
Return<void> read() override { return mHeap->read(); }
Return<void> updateRange(uint64_t start, uint64_t length) override {
return mHeap->updateRange(start, length);
}
Return<void> readRange(uint64_t start, uint64_t length) override {
return mHeap->readRange(start, length);
}
Return<void> commit() override { return mHeap->commit(); }
Return<void*> getPointer() override { return mHeap->getPointer(); }
Return<uint64_t> getSize() override { return mHeap->getSize(); }
protected:
sp<IMemory> mHeap;
};
class MemoryCacheable : public virtual MemoryDecorator {
public:
MemoryCacheable(const sp<IMemory>& heap, sp<IMemoryToken> key)
: MemoryDecorator(heap), mKey(key) {}
virtual ~MemoryCacheable() { HidlMemoryCache::getInstance()->flush(mKey); }
protected:
sp<IMemoryToken> mKey;
};
class MemoryBlockImpl : public virtual IMemory {
public:
MemoryBlockImpl(const sp<IMemory>& heap, uint64_t size, uint64_t offset)
: mHeap(heap), mSize(size), mOffset(offset), mHeapSize(heap->getSize()) {}
bool validRange(uint64_t start, uint64_t length) {
return (start + length <= mSize) && (start + length >= start) &&
(mOffset + mSize <= mHeapSize);
}
Return<void> readRange(uint64_t start, uint64_t length) override {
if (!validRange(start, length)) {
ALOGE("IMemoryBlock::readRange: out of range");
return Void();
}
return mHeap->readRange(mOffset + start, length);
}
Return<void> updateRange(uint64_t start, uint64_t length) override {
if (!validRange(start, length)) {
ALOGE("IMemoryBlock::updateRange: out of range");
return Void();
}
return mHeap->updateRange(mOffset + start, length);
}
Return<void> read() override { return this->readRange(0, mSize); }
Return<void> update() override { return this->updateRange(0, mSize); }
Return<void> commit() override { return mHeap->commit(); }
Return<uint64_t> getSize() override { return mSize; }
Return<void*> getPointer() override {
void* p = mHeap->getPointer();
return (static_cast<char*>(p) + mOffset);
}
protected:
sp<IMemory> mHeap;
uint64_t mSize;
uint64_t mOffset;
uint64_t mHeapSize;
};
sp<HidlMemoryCache> HidlMemoryCache::getInstance() {
static sp<HidlMemoryCache> instance = new HidlMemoryCache();
return instance;
}
sp<IMemory> HidlMemoryCache::fillLocked(const sp<IMemoryToken>& key) {
sp<IMemory> memory = nullptr;
Return<void> ret = key->get(
[&](const hidl_memory& mem) { memory = new MemoryCacheable(mapMemory(mem), key); });
if (!ret.isOk()) {
ALOGE("HidlMemoryCache::fill: cannot IMemoryToken::get.");
return nullptr;
}
mCached[key] = memory;
return memory;
}
sp<IMemory> HidlMemoryCache::map(const MemoryBlock& memblk) {
sp<IMemoryToken> token = memblk.token;
sp<IMemory> heap = fetch(token);
if (heap == nullptr) {
return nullptr;
}
return new MemoryBlockImpl(heap, memblk.size, memblk.offset);
}
} // namespace hardware
} // namespace android
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