/* SPDX-License-Identifier: GPL-2.0-only */
/*
 * Copyright (c) 2011-2014, The Linux Foundation. All rights reserved.
 */

#ifndef _DMA_H_
#define _DMA_H_

#include <linux/dmaengine.h>

/* maximum data transfer block size between BAM and CE */
#define QCE_BAM_BURST_SIZE              64

#define QCE_AUTHIV_REGS_CNT             16
#define QCE_AUTH_BYTECOUNT_REGS_CNT     4
#define QCE_CNTRIV_REGS_CNT             4

struct qce_result_dump {
        u32 auth_iv[QCE_AUTHIV_REGS_CNT];
        u32 auth_byte_count[QCE_AUTH_BYTECOUNT_REGS_CNT];
        u32 encr_cntr_iv[QCE_CNTRIV_REGS_CNT];
        u32 status;
        u32 status2;
};

#define QCE_IGNORE_BUF_SZ       (2 * QCE_BAM_BURST_SIZE)
#define QCE_RESULT_BUF_SZ       \
                ALIGN(sizeof(struct qce_result_dump), QCE_BAM_BURST_SIZE)

struct qce_dma_data {
        struct dma_chan *txchan;
        struct dma_chan *rxchan;
        struct qce_result_dump *result_buf;
        void *ignore_buf;
};

int devm_qce_dma_request(struct device *dev, struct qce_dma_data *dma);
int qce_dma_prep_sgs(struct qce_dma_data *dma, struct scatterlist *sg_in,
                     int in_ents, struct scatterlist *sg_out, int out_ents,
                     dma_async_tx_callback cb, void *cb_param);
void qce_dma_issue_pending(struct qce_dma_data *dma);
int qce_dma_terminate_all(struct qce_dma_data *dma);
struct scatterlist *
qce_sgtable_add(struct sg_table *sgt, struct scatterlist *sg_add,
                unsigned int max_len);

#endif /* _DMA_H_ */