1#ifndef __ION_UTILS_H
2#define __ION_UTILS_H
3
4#include "ion.h"
5
6#define SOCKET_NAME "ion_socket"
7#define ION_DEVICE "/dev/ion"
8
9#define ION_BUFFER_LEN	4096
10#define MAX_HEAP_COUNT	ION_HEAP_TYPE_CUSTOM
11
12struct socket_info {
13	int sockfd;
14	int datafd;
15	unsigned long buflen;
16};
17
18struct ion_buffer_info {
19	int ionfd;
20	int buffd;
21	unsigned int heap_type;
22	unsigned int flag_type;
23	unsigned long heap_size;
24	unsigned long buflen;
25	unsigned char *buffer;
26};
27
28
29/* This is used to fill the data into the mapped buffer */
30void write_buffer(void *buffer, unsigned long len);
31
32/* This is used to read the data from the exported buffer */
33void read_buffer(void *buffer, unsigned long len);
34
35/* This is used to create an ION buffer FD for the kernel buffer
36 * So you can export this same buffer to others in the form of FD
37 */
38int ion_export_buffer_fd(struct ion_buffer_info *ion_info);
39
40/* This is used to import or map an exported FD.
41 * So we point to same buffer without making a copy. Hence zero-copy.
42 */
43int ion_import_buffer_fd(struct ion_buffer_info *ion_info);
44
45/* This is used to close all references for the ION client */
46void ion_close_buffer_fd(struct ion_buffer_info *ion_info);
47
48/* This is used to send FD to another process using socket IPC */
49int socket_send_fd(struct socket_info *skinfo);
50
51/* This is used to receive FD from another process using socket IPC */
52int socket_receive_fd(struct socket_info *skinfo);
53
54
55#endif
56