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/*
* Copyright (c) 2011-2012, 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.
*/
#include <linux/ioctl.h>
#include <sys/mman.h>
#include <stdlib.h>
#include <fcntl.h>
#include <cutils/log.h>
#include <errno.h>
#include "gralloc_priv.h"
#include "ionalloc.h"
using gralloc::IonAlloc;
#define ION_DEVICE "/dev/ion"
int IonAlloc::open_device()
{
if(mIonFd == FD_INIT)
mIonFd = open(ION_DEVICE, O_RDONLY);
if(mIonFd < 0 ) {
ALOGE("%s: Failed to open ion device - %s",
__FUNCTION__, strerror(errno));
mIonFd = FD_INIT;
return -errno;
}
return 0;
}
void IonAlloc::close_device()
{
if(mIonFd >= 0)
close(mIonFd);
mIonFd = FD_INIT;
}
int IonAlloc::alloc_buffer(alloc_data& data)
{
Locker::Autolock _l(mLock);
int err = 0;
int ionSyncFd = FD_INIT;
int iFd = FD_INIT;
struct ion_handle_data handle_data;
struct ion_fd_data fd_data;
struct ion_allocation_data ionAllocData;
void *base = 0;
ionAllocData.len = data.size;
ionAllocData.align = data.align;
ionAllocData.flags = data.flags;
err = open_device();
if (err)
return err;
if(data.uncached) {
// Use the sync FD to alloc and map
// when we need uncached memory
// XXX: Change O_SYNC to O_DSYNC when available in bionic
ionSyncFd = open(ION_DEVICE, O_RDONLY|O_SYNC);
if(ionSyncFd < 0) {
ALOGE("%s: Failed to open ion device - %s",
__FUNCTION__, strerror(errno));
return -errno;
}
iFd = ionSyncFd;
} else {
iFd = mIonFd;
}
if(ioctl(iFd, ION_IOC_ALLOC, &ionAllocData)) {
err = -errno;
ALOGE("ION_IOC_ALLOC failed with error - %s", strerror(errno));
if(ionSyncFd >= 0)
close(ionSyncFd);
ionSyncFd = FD_INIT;
return err;
}
fd_data.handle = ionAllocData.handle;
handle_data.handle = ionAllocData.handle;
if(ioctl(iFd, ION_IOC_MAP, &fd_data)) {
err = -errno;
ALOGE("%s: ION_IOC_MAP failed with error - %s",
__FUNCTION__, strerror(errno));
ioctl(mIonFd, ION_IOC_FREE, &handle_data);
if(ionSyncFd >= 0)
close(ionSyncFd);
ionSyncFd = FD_INIT;
return err;
}
if(!(data.flags & ION_SECURE) &&
!(data.allocType & private_handle_t::PRIV_FLAGS_NOT_MAPPED)) {
base = mmap(0, ionAllocData.len, PROT_READ|PROT_WRITE,
MAP_SHARED, fd_data.fd, 0);
if(base == MAP_FAILED) {
err = -errno;
ALOGE("%s: Failed to map the allocated memory: %s",
__FUNCTION__, strerror(errno));
ioctl(mIonFd, ION_IOC_FREE, &handle_data);
ionSyncFd = FD_INIT;
return err;
}
memset(base, 0, ionAllocData.len);
// Clean cache after memset
clean_buffer(base, data.size, data.offset, fd_data.fd);
}
//Close the uncached FD since we no longer need it;
if(ionSyncFd >= 0)
close(ionSyncFd);
ionSyncFd = FD_INIT;
data.base = base;
data.fd = fd_data.fd;
ioctl(mIonFd, ION_IOC_FREE, &handle_data);
ALOGV("ion: Allocated buffer base:%p size:%d fd:%d",
data.base, ionAllocData.len, data.fd);
return 0;
}
int IonAlloc::free_buffer(void* base, size_t size, int offset, int fd)
{
Locker::Autolock _l(mLock);
ALOGV("ion: Freeing buffer base:%p size:%d fd:%d",
base, size, fd);
int err = 0;
err = open_device();
if (err)
return err;
if(base)
err = unmap_buffer(base, size, offset);
close(fd);
return err;
}
int IonAlloc::map_buffer(void **pBase, size_t size, int offset, int fd)
{
int err = 0;
void *base = 0;
// It is a (quirky) requirement of ION to have opened the
// ion fd in the process that is doing the mapping
err = open_device();
if (err)
return err;
base = mmap(0, size, PROT_READ| PROT_WRITE,
MAP_SHARED, fd, 0);
*pBase = base;
if(base == MAP_FAILED) {
err = -errno;
ALOGD("ion: Failed to map memory in the client: %s",
strerror(errno));
} else {
ALOGV("ion: Mapped buffer base:%p size:%d offset:%d fd:%d",
base, size, offset, fd);
}
return err;
}
int IonAlloc::unmap_buffer(void *base, size_t size, int offset)
{
ALOGV("ion: Unmapping buffer base:%p size:%d", base, size);
int err = 0;
if(munmap(base, size)) {
err = -errno;
ALOGE("ion: Failed to unmap memory at %p : %s",
base, strerror(errno));
}
return err;
}
int IonAlloc::clean_buffer(void *base, size_t size, int offset, int fd)
{
struct ion_flush_data flush_data;
struct ion_fd_data fd_data;
struct ion_handle_data handle_data;
struct ion_handle* handle;
int err = 0;
err = open_device();
if (err)
return err;
fd_data.fd = fd;
if (ioctl(mIonFd, ION_IOC_IMPORT, &fd_data)) {
err = -errno;
ALOGE("%s: ION_IOC_IMPORT failed with error - %s",
__FUNCTION__, strerror(errno));
return err;
}
handle_data.handle = fd_data.handle;
flush_data.handle = fd_data.handle;
flush_data.vaddr = base;
flush_data.offset = offset;
flush_data.length = size;
struct ion_custom_data d;
d.cmd = ION_IOC_CLEAN_INV_CACHES;
d.arg = (unsigned long int)&flush_data;
if(ioctl(mIonFd, ION_IOC_CUSTOM, &d)) {
err = -errno;
ALOGE("%s: ION_IOC_CLEAN_INV_CACHES failed with error - %s",
__FUNCTION__, strerror(errno));
ioctl(mIonFd, ION_IOC_FREE, &handle_data);
return err;
}
ioctl(mIonFd, ION_IOC_FREE, &handle_data);
return 0;
}
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