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/*
* Copyright (C) 2016, 2018-2020 ARM Limited. All rights reserved.
*
* Copyright (C) 2008 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.
*/
#include <hardware/gralloc1.h>
#include "mali_gralloc_buffer.h"
#include "allocator/mali_gralloc_ion.h"
#include "allocator/mali_gralloc_shared_memory.h"
#include "mali_gralloc_bufferallocation.h"
#include "mali_gralloc_debug.h"
static pthread_mutex_t s_map_lock = PTHREAD_MUTEX_INITIALIZER;
int mali_gralloc_reference_retain(buffer_handle_t handle)
{
if (private_handle_t::validate(handle) < 0)
{
MALI_GRALLOC_LOGE("Registering/Retaining invalid buffer %p, returning error", handle);
return -EINVAL;
}
private_handle_t *hnd = (private_handle_t *)handle;
pthread_mutex_lock(&s_map_lock);
if (hnd->allocating_pid == getpid() || hnd->remote_pid == getpid())
{
hnd->ref_count++;
pthread_mutex_unlock(&s_map_lock);
return 0;
}
else
{
hnd->remote_pid = getpid();
hnd->ref_count = 1;
}
int retval= mali_gralloc_ion_map(hnd);
/* Import ION handle to let ION driver know who's using the buffer */
import_exynos_ion_handles(hnd);
pthread_mutex_unlock(&s_map_lock);
return retval;
}
int mali_gralloc_reference_release(buffer_handle_t handle, bool canFree)
{
if (private_handle_t::validate(handle) < 0)
{
MALI_GRALLOC_LOGE("unregistering/releasing invalid buffer %p, returning error", handle);
return -EINVAL;
}
private_handle_t *hnd = (private_handle_t *)handle;
pthread_mutex_lock(&s_map_lock);
if (hnd->ref_count == 0)
{
MALI_GRALLOC_LOGE("Buffer %p should have already been released", handle);
pthread_mutex_unlock(&s_map_lock);
return -EINVAL;
}
if (hnd->allocating_pid == getpid())
{
hnd->ref_count--;
if (hnd->ref_count == 0 && canFree)
{
free_exynos_ion_handles(hnd);
mali_gralloc_dump_buffer_erase(hnd);
mali_gralloc_buffer_free(handle);
delete handle;
}
}
else if (hnd->remote_pid == getpid()) // never unmap buffers that were not imported into this process
{
hnd->ref_count--;
if (hnd->ref_count == 0)
{
mali_gralloc_ion_unmap(hnd);
free_exynos_ion_handles(hnd);
/* TODO: Make this unmapping of shared meta fd into a function? */
if (hnd->attr_base)
{
munmap(hnd->attr_base, hnd->attr_size);
hnd->attr_base = nullptr;
}
}
}
else
{
MALI_GRALLOC_LOGE("Trying to unregister buffer %p from process %d that was not imported into current process: %d", hnd,
hnd->remote_pid, getpid());
}
pthread_mutex_unlock(&s_map_lock);
return 0;
}
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