41 lines
1.2 KiB
C
41 lines
1.2 KiB
C
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/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright (C) 2016 MediaTek Inc.
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*/
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#ifndef __CCCI_RINGBUF_H__
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#define __CCCI_RINGBUF_H__
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enum ccci_ringbuf_error {
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CCCI_RINGBUF_OK = 0,
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CCCI_RINGBUF_PARAM_ERR,
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CCCI_RINGBUF_NOT_ENOUGH,
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CCCI_RINGBUF_BAD_HEADER,
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CCCI_RINGBUF_BAD_FOOTER,
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CCCI_RINGBUF_NOT_COMPLETE,
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CCCI_RINGBUF_EMPTY,
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};
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struct ccci_ringbuf {
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struct {
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unsigned int read;
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unsigned int write;
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unsigned int length;
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} rx_control, tx_control;
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unsigned char buffer[0];
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};
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#define CCCI_RINGBUF_CTL_LEN (8+sizeof(struct ccci_ringbuf)+8)
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int ccci_ringbuf_readable(int md_id, struct ccci_ringbuf *ringbuf);
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int ccci_ringbuf_writeable(int md_id, struct ccci_ringbuf *ringbuf,
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unsigned int write_size);
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struct ccci_ringbuf *ccci_create_ringbuf(int md_id, unsigned char *buf,
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int buf_size, int rx_size, int tx_size);
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int ccci_ringbuf_read(int md_id, struct ccci_ringbuf *ringbuf,
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unsigned char *buf, int read_size);
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int ccci_ringbuf_write(int md_id, struct ccci_ringbuf *ringbuf,
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unsigned char *data, int data_len);
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void ccci_ringbuf_move_rpointer(int md_id, struct ccci_ringbuf *ringbuf,
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int read_size);
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void ccci_ringbuf_reset(int md_id, struct ccci_ringbuf *ringbuf, int dir);
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#endif /* __CCCI_RINGBUF_H__ */
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