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libsecion for Exynos 4412
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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); | |
} | |
struct 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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/* | |
* 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. | |
*/ | |
#ifndef _LIB_SECION_H_ | |
#define _LIB_SECION_H_ | |
#include <unistd.h> | |
typedef unsigned long ion_phys_addr_t; | |
typedef int ion_client; | |
typedef int ion_buffer; | |
enum ION_MSYNC_FLAGS { | |
IMSYNC_DEV_TO_READ = 0, | |
IMSYNC_DEV_TO_WRITE = 1, | |
IMSYNC_DEV_TO_RW = 2, | |
IMSYNC_SYNC_FOR_DEV = 0x10000, | |
IMSYNC_SYNC_FOR_CPU = 0x20000, | |
}; | |
struct secion_param { | |
ion_client client; | |
ion_buffer buffer; | |
size_t size; | |
void *memory; | |
ion_phys_addr_t physaddr; | |
}; | |
#ifdef __cplusplus | |
extern "C" { | |
#endif | |
ion_client ion_client_create(void); | |
void ion_client_destroy(ion_client client); | |
ion_buffer ion_alloc(ion_client client, size_t len, size_t align, unsigned int flags); | |
void ion_free(ion_buffer buffer); | |
void *ion_map(ion_buffer buffer, size_t len, off_t offset); | |
int ion_unmap(void *addr, size_t len); | |
int ion_msync(ion_client client, ion_buffer buffer, enum ION_MSYNC_FLAGS flags, size_t size, off_t offset); | |
ion_phys_addr_t ion_getphys(ion_client client, ion_buffer buffer); | |
int createIONMem(struct secion_param *param, size_t size, unsigned int flags); | |
int destroyIONMem(struct secion_param *param); | |
#ifdef __cplusplus | |
} | |
#endif | |
#endif /* _LIB_SECION_H_ */ |
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