drivers/staging/ccree/ssi_ivgen.h

/*
 * 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__*/