/*
 * 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/>.
 */

/* \file buffer_mgr.h
   Buffer Manager
 */

#ifndef __SSI_BUFFER_MGR_H__
#define __SSI_BUFFER_MGR_H__

#include <crypto/algapi.h>

#include "ssi_config.h"
#include "ssi_driver.h"


enum ssi_req_dma_buf_type {
	SSI_DMA_BUF_NULL = 0,
	SSI_DMA_BUF_DLLI,
	SSI_DMA_BUF_MLLI
};

enum ssi_sg_cpy_direct {
	SSI_SG_TO_BUF = 0,
	SSI_SG_FROM_BUF = 1
};

struct ssi_mlli {
	ssi_sram_addr_t sram_addr;
	unsigned int nents; //sg nents
	unsigned int mlli_nents; //mlli nents might be different than the above
};

struct mlli_params {
	struct dma_pool *curr_pool;
	u8 *mlli_virt_addr;
	dma_addr_t mlli_dma_addr;
	u32 mlli_len;
};

int ssi_buffer_mgr_init(struct ssi_drvdata *drvdata);

int ssi_buffer_mgr_fini(struct ssi_drvdata *drvdata);

int ssi_buffer_mgr_map_blkcipher_request(
	struct ssi_drvdata *drvdata,
	void *ctx,
	unsigned int ivsize,
	unsigned int nbytes,
	void *info,
	struct scatterlist *src,
	struct scatterlist *dst);

void ssi_buffer_mgr_unmap_blkcipher_request(
	struct device *dev,
	void *ctx,
	unsigned int ivsize,
	struct scatterlist *src,
	struct scatterlist *dst);

int ssi_buffer_mgr_map_aead_request(struct ssi_drvdata *drvdata, struct aead_request *req);

void ssi_buffer_mgr_unmap_aead_request(struct device *dev, struct aead_request *req);

int ssi_buffer_mgr_map_hash_request_final(struct ssi_drvdata *drvdata, void *ctx, struct scatterlist *src, unsigned int nbytes, bool do_update);

int ssi_buffer_mgr_map_hash_request_update(struct ssi_drvdata *drvdata, void *ctx, struct scatterlist *src, unsigned int nbytes, unsigned int block_size);

void ssi_buffer_mgr_unmap_hash_request(struct device *dev, void *ctx, struct scatterlist *src, bool do_revert);

void ssi_buffer_mgr_copy_scatterlist_portion(u8 *dest, struct scatterlist *sg, u32 to_skip, u32 end, enum ssi_sg_cpy_direct direct);

void ssi_buffer_mgr_zero_sgl(struct scatterlist *sgl, u32 data_len);


#ifdef CC_DMA_48BIT_SIM
dma_addr_t ssi_buff_mgr_update_dma_addr(dma_addr_t orig_addr, u32 data_len);
dma_addr_t ssi_buff_mgr_restore_dma_addr(dma_addr_t orig_addr);

#define SSI_UPDATE_DMA_ADDR_TO_48BIT(addr,size) addr = \
					ssi_buff_mgr_update_dma_addr(addr,size)
#define SSI_RESTORE_DMA_ADDR_TO_48BIT(addr) addr = \
					ssi_buff_mgr_restore_dma_addr(addr)
#else

#define SSI_UPDATE_DMA_ADDR_TO_48BIT(addr,size) addr = addr
#define SSI_RESTORE_DMA_ADDR_TO_48BIT(addr) addr = addr

#endif

#endif /*__BUFFER_MGR_H__*/