ssi_ivgen.h
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/*
* Copyright (C) 2012-2017 ARM Limited or its affiliates.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#ifndef __SSI_IVGEN_H__
#define __SSI_IVGEN_H__
#include "cc_hw_queue_defs.h"
#define SSI_IVPOOL_SEQ_LEN 8
/*!
* Allocates iv-pool and maps resources.
* This function generates the first IV pool.
*
* \param drvdata Driver's private context
*
* \return int Zero for success, negative value otherwise.
*/
int ssi_ivgen_init(struct ssi_drvdata *drvdata);
/*!
* Free iv-pool and ivgen context.
*
* \param drvdata
*/
void ssi_ivgen_fini(struct ssi_drvdata *drvdata);
/*!
* Generates the initial pool in SRAM.
* This function should be invoked when resuming DX driver.
*
* \param drvdata
*
* \return int Zero for success, negative value otherwise.
*/
int ssi_ivgen_init_sram_pool(struct ssi_drvdata *drvdata);
/*!
* Acquires 16 Bytes IV from the iv-pool
*
* \param drvdata Driver private context
* \param iv_out_dma Array of physical IV out addresses
* \param iv_out_dma_len Length of iv_out_dma array (additional elements of iv_out_dma array are ignore)
* \param iv_out_size May be 8 or 16 bytes long
* \param iv_seq IN/OUT array to the descriptors sequence
* \param iv_seq_len IN/OUT pointer to the sequence length
*
* \return int Zero for success, negative value otherwise.
*/
int ssi_ivgen_getiv(
struct ssi_drvdata *drvdata,
dma_addr_t iv_out_dma[],
unsigned int iv_out_dma_len,
unsigned int iv_out_size,
struct cc_hw_desc iv_seq[],
unsigned int *iv_seq_len);
#endif /*__SSI_IVGEN_H__*/