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/*
* Copyright (C) 2012 Samsung Electronics Co., Ltd.
*
* 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 "libsecion"
#include <secion.h>
#include <fcntl.h>
#include <sys/mman.h>
#include <sys/ioctl.h>
#include <cutils/log.h>
#define ION_IOC_MAGIC 'I'
#define ION_IOC_ALLOC _IOWR(ION_IOC_MAGIC, 0, struct ion_allocation_data)
#define ION_IOC_FREE _IOWR(ION_IOC_MAGIC, 1, struct ion_handle_data)
#define ION_IOC_MAP _IOWR(ION_IOC_MAGIC, 2, struct ion_fd_data)
#define ION_IOC_SHARE _IOWR(ION_IOC_MAGIC, 4, struct ion_fd_data)
#define ION_IOC_IMPORT _IOWR(ION_IOC_MAGIC, 5, int)
#define ION_IOC_CUSTOM _IOWR(ION_IOC_MAGIC, 6, struct ion_custom_data)
typedef unsigned long ion_handle;
struct ion_allocation_data {
size_t len;
size_t align;
unsigned int flags;
ion_handle *handle;
};
struct ion_fd_data {
ion_handle *handle;
int fd;
};
struct ion_handle_data {
ion_handle *handle;
};
struct ion_custom_data {
unsigned int cmd;
unsigned long arg;
};
struct ion_msync_data {
enum ION_MSYNC_FLAGS dir;
int fd;
size_t size;
off_t offset;
};
struct ion_phys_data {
int fd;
ion_phys_addr_t phys;
size_t size;
};
enum ION_EXYNOS_CUSTOM_CMD {
ION_EXYNOS_CUSTOM_MSYNC,
ION_EXYNOS_CUSTOM_PHYS
};
ion_client ion_client_create(void)
{
return open("/dev/ion", O_RDWR);
}
void ion_client_destroy(ion_client client)
{
close(client);
}
ion_buffer ion_alloc(ion_client client, size_t len, size_t align, unsigned int flags)
{
int ret;
struct ion_handle_data arg_free;
struct ion_fd_data arg_share;
struct ion_allocation_data arg_alloc;
arg_alloc.len = len;
arg_alloc.align = align;
arg_alloc.flags = flags;
ret = ioctl(client, ION_IOC_ALLOC, &arg_alloc);
if (ret < 0)
return ret;
arg_share.handle = arg_alloc.handle;
ret = ioctl(client, ION_IOC_SHARE, &arg_share);
arg_free.handle = arg_alloc.handle;
ioctl(client, ION_IOC_FREE, &arg_free);
if (ret < 0)
return ret;
return arg_share.fd;
}
void ion_free(ion_buffer buffer)
{
close(buffer);
}
void *ion_map(ion_buffer buffer, size_t len, off_t offset)
{
return mmap(NULL, len, PROT_READ | PROT_WRITE, MAP_SHARED,
buffer, offset);
}
int ion_unmap(void *addr, size_t len)
{
return munmap(addr, len);
}
int ion_msync(ion_client client, ion_buffer buffer, enum ION_MSYNC_FLAGS flags, size_t size, off_t offset)
{
struct ion_msync_data arg_cdata;
arg_cdata.size = size;
arg_cdata.dir = flags;
arg_cdata.fd = buffer;
arg_cdata.offset = offset;
struct ion_custom_data arg_custom;
arg_custom.cmd = ION_EXYNOS_CUSTOM_MSYNC;
arg_custom.arg = (unsigned long) &arg_cdata;
return ioctl(client, ION_IOC_CUSTOM, &arg_custom);
}
ion_phys_addr_t ion_getphys(ion_client client, ion_buffer buffer)
{
struct ion_phys_data arg_cdata;
arg_cdata.fd = buffer;
struct ion_custom_data arg_custom;
arg_custom.cmd = ION_EXYNOS_CUSTOM_PHYS;
arg_custom.arg = (unsigned long) &arg_cdata;
if(ioctl(client, ION_IOC_CUSTOM, &arg_custom) < 0)
return 0;
return arg_cdata.phys;
}
int createIONMem(struct secion_param *param, size_t size, unsigned int flags)
{
if(param->client < 0 && (param->client = ion_client_create()) < 0) {
ALOGE("createIONMem:: ion_client_create fail\n");
goto fail;
}
if(param->buffer < 0 && (param->buffer = ion_alloc(param->client, size, 0x10000, flags)) < 0) {
ALOGE("createIONMem:: ion_alloc fail\n");
goto fail;
}
if((param->physaddr = ion_getphys(param->client, param->buffer)) == 0) {
ALOGE("createIONMem:: ion_getphys fail, phys_addr = 0\n");
goto fail;
}
if((param->memory = ion_map(param->buffer, size, 0)) == (void*)-1) {
ALOGE("createIONMem:: ion_map fail\n");
goto fail;
} else {
param->size = size;
return 0;
}
fail:
if(param->memory > 0) munmap(param->memory, size);
if(param->buffer > 0) ion_free(param->buffer);
param->buffer = -1;
param->size = 0;
param->memory = 0;
param->physaddr = 0;
return -1;
}
int destroyIONMem(struct secion_param *param)
{
if(param->memory != 0) munmap(param->memory, param->size);
if(param->buffer >= 0) ion_free(param->buffer);
param->buffer = -1;
param->size = 0;
param->memory = 0;
param->physaddr = 0;
return 0;
}
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