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1/* SPDX-License-Identifier: GPL-2.0 */
2/* Copyright (C) 2012-2019 ARM Limited (or its affiliates). */
3
4#ifndef __CC_IVGEN_H__
5#define __CC_IVGEN_H__
6
7#include "cc_hw_queue_defs.h"
8
9#define CC_IVPOOL_SEQ_LEN 8
10
11/*!
12 * Allocates iv-pool and maps resources.
13 * This function generates the first IV pool.
14 *
15 * \param drvdata Driver's private context
16 *
17 * \return int Zero for success, negative value otherwise.
18 */
19int cc_ivgen_init(struct cc_drvdata *drvdata);
20
21/*!
22 * Free iv-pool and ivgen context.
23 *
24 * \param drvdata
25 */
26void cc_ivgen_fini(struct cc_drvdata *drvdata);
27
28/*!
29 * Generates the initial pool in SRAM.
30 * This function should be invoked when resuming DX driver.
31 *
32 * \param drvdata
33 *
34 * \return int Zero for success, negative value otherwise.
35 */
36int cc_init_iv_sram(struct cc_drvdata *drvdata);
37
38/*!
39 * Acquires 16 Bytes IV from the iv-pool
40 *
41 * \param drvdata Driver private context
42 * \param iv_out_dma Array of physical IV out addresses
43 * \param iv_out_dma_len Length of iv_out_dma array (additional elements of
44 * iv_out_dma array are ignore)
45 * \param iv_out_size May be 8 or 16 bytes long
46 * \param iv_seq IN/OUT array to the descriptors sequence
47 * \param iv_seq_len IN/OUT pointer to the sequence length
48 *
49 * \return int Zero for success, negative value otherwise.
50 */
51int cc_get_iv(struct cc_drvdata *drvdata, dma_addr_t iv_out_dma[],
52 unsigned int iv_out_dma_len, unsigned int iv_out_size,
53 struct cc_hw_desc iv_seq[], unsigned int *iv_seq_len);
54
55#endif /*__CC_IVGEN_H__*/