56 lines
1.4 KiB
C
56 lines
1.4 KiB
C
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#ifndef __ION_UTILS_H
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#define __ION_UTILS_H
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#include "ion.h"
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#define SOCKET_NAME "ion_socket"
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#define ION_DEVICE "/dev/ion"
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#define ION_BUFFER_LEN 4096
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#define MAX_HEAP_COUNT ION_HEAP_TYPE_CUSTOM
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struct socket_info {
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int sockfd;
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int datafd;
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unsigned long buflen;
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};
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struct ion_buffer_info {
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int ionfd;
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int buffd;
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unsigned int heap_type;
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unsigned int flag_type;
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unsigned long heap_size;
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unsigned long buflen;
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unsigned char *buffer;
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};
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/* This is used to fill the data into the mapped buffer */
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void write_buffer(void *buffer, unsigned long len);
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/* This is used to read the data from the exported buffer */
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void read_buffer(void *buffer, unsigned long len);
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/* This is used to create an ION buffer FD for the kernel buffer
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* So you can export this same buffer to others in the form of FD
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*/
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int ion_export_buffer_fd(struct ion_buffer_info *ion_info);
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/* This is used to import or map an exported FD.
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* So we point to same buffer without making a copy. Hence zero-copy.
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*/
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int ion_import_buffer_fd(struct ion_buffer_info *ion_info);
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/* This is used to close all references for the ION client */
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void ion_close_buffer_fd(struct ion_buffer_info *ion_info);
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/* This is used to send FD to another process using socket IPC */
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int socket_send_fd(struct socket_info *skinfo);
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/* This is used to receive FD from another process using socket IPC */
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int socket_receive_fd(struct socket_info *skinfo);
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#endif
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