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/*
* Copyright (c) 2011, The Linux Foundation. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials provided
* with the distribution.
* * Neither the name of The Linux Foundation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
* IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef OVERLAY_MEM_H
#define OVERLAY_MEM_H
#include <sys/mman.h>
#include <fcntl.h>
#include <alloc_controller.h>
#include <memalloc.h>
#include "gralloc_priv.h"
#include "overlayUtils.h"
#define SIZE_1M 0x00100000
namespace overlay {
/*
* Holds base address, offset and the fd
* */
class OvMem {
public:
/* ctor init*/
explicit OvMem();
/* dtor DO NOT call close so it can be copied */
~OvMem();
/* Use libgralloc to retrieve fd, base addr, alloc type */
bool open(uint32_t numbufs,
uint32_t bufSz, bool isSecure);
/* close fd. assign base address to invalid*/
bool close();
/* return underlying fd */
int getFD() const;
/* return true if fd is valid and base address is valid */
bool valid() const;
/* dump the state of the object */
void dump() const;
/* return underlying address */
void* addr() const;
/* return underlying offset */
uint32_t bufSz() const;
/* return number of bufs */
uint32_t numBufs() const ;
private:
/* actual os fd */
int mFd;
/* points to base addr (mmap)*/
void* mBaseAddr;
/* allocated buffer type determined by gralloc (ashmem, ion, etc) */
int mAllocType;
/* holds buf size sent down by the client */
uint32_t mBufSz;
/* num of bufs */
uint32_t mNumBuffers;
/* gralloc alloc controller */
gralloc::IAllocController* mAlloc;
/*Holds the aligned buffer size used for actual allocation*/
uint32_t mBufSzAligned;
};
//-------------------Inlines-----------------------------------
using gralloc::IMemAlloc;
using gralloc::alloc_data;
inline OvMem::OvMem() {
mFd = -1;
mBaseAddr = MAP_FAILED;
mAllocType = 0;
mBufSz = 0;
mNumBuffers = 0;
mAlloc = gralloc::IAllocController::getInstance();
}
inline OvMem::~OvMem() { }
inline bool OvMem::open(uint32_t numbufs,
uint32_t bufSz, bool isSecure)
{
alloc_data data;
int allocFlags = GRALLOC_USAGE_PRIVATE_IOMMU_HEAP;
int err = 0;
OVASSERT(numbufs && bufSz, "numbufs=%d bufSz=%d", numbufs, bufSz);
mBufSz = bufSz;
if(isSecure) {
allocFlags = GRALLOC_USAGE_PRIVATE_MM_HEAP;
allocFlags |= GRALLOC_USAGE_PROTECTED;
mBufSzAligned = utils::align(bufSz, SIZE_1M);
data.align = SIZE_1M;
} else {
mBufSzAligned = bufSz;
data.align = getpagesize();
}
// Allocate uncached rotator buffers
allocFlags |= GRALLOC_USAGE_PRIVATE_UNCACHED;
mNumBuffers = numbufs;
data.base = 0;
data.fd = -1;
data.offset = 0;
data.size = mBufSzAligned * mNumBuffers;
data.uncached = true;
err = mAlloc->allocate(data, allocFlags);
if (err != 0) {
ALOGE("OvMem: Error allocating memory");
return false;
}
mFd = data.fd;
mBaseAddr = data.base;
mAllocType = data.allocType;
return true;
}
inline bool OvMem::close()
{
int ret = 0;
if(!valid()) {
return true;
}
IMemAlloc* memalloc = mAlloc->getAllocator(mAllocType);
ret = memalloc->free_buffer(mBaseAddr, mBufSzAligned * mNumBuffers, 0, mFd);
if (ret != 0) {
ALOGE("OvMem: error freeing buffer");
return false;
}
mFd = -1;
mBaseAddr = MAP_FAILED;
mAllocType = 0;
mBufSz = 0;
mBufSzAligned = 0;
mNumBuffers = 0;
return true;
}
inline bool OvMem::valid() const
{
return (mFd != -1) && (mBaseAddr != MAP_FAILED);
}
inline int OvMem::getFD() const
{
return mFd;
}
inline void* OvMem::addr() const
{
return mBaseAddr;
}
inline uint32_t OvMem::bufSz() const
{
return mBufSz;
}
inline uint32_t OvMem::numBufs() const
{
return mNumBuffers;
}
inline void OvMem::dump() const
{
ALOGE("== Dump OvMem start ==");
ALOGE("fd=%d addr=%p type=%d bufsz=%u AlignedBufSz=%u",
mFd, mBaseAddr, mAllocType, mBufSz, mBufSzAligned);
ALOGE("== Dump OvMem end ==");
}
} // overlay
#endif // OVERLAY_MEM_H
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