/*
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* Copyright (c) 2011-2014, The Linux Foundation. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 and
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* only version 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#ifndef _DMA_H_
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#define _DMA_H_
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#include <linux/dmaengine.h>
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/* maximum data transfer block size between BAM and CE */
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#define QCE_BAM_BURST_SIZE 64
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#define QCE_AUTHIV_REGS_CNT 16
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#define QCE_AUTH_BYTECOUNT_REGS_CNT 4
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#define QCE_CNTRIV_REGS_CNT 4
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struct qce_result_dump {
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u32 auth_iv[QCE_AUTHIV_REGS_CNT];
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u32 auth_byte_count[QCE_AUTH_BYTECOUNT_REGS_CNT];
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u32 encr_cntr_iv[QCE_CNTRIV_REGS_CNT];
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u32 status;
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u32 status2;
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};
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#define QCE_IGNORE_BUF_SZ (2 * QCE_BAM_BURST_SIZE)
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#define QCE_RESULT_BUF_SZ \
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ALIGN(sizeof(struct qce_result_dump), QCE_BAM_BURST_SIZE)
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struct qce_dma_data {
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struct dma_chan *txchan;
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struct dma_chan *rxchan;
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struct qce_result_dump *result_buf;
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void *ignore_buf;
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};
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int qce_dma_request(struct device *dev, struct qce_dma_data *dma);
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void qce_dma_release(struct qce_dma_data *dma);
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int qce_dma_prep_sgs(struct qce_dma_data *dma, struct scatterlist *sg_in,
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int in_ents, struct scatterlist *sg_out, int out_ents,
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dma_async_tx_callback cb, void *cb_param);
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void qce_dma_issue_pending(struct qce_dma_data *dma);
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int qce_dma_terminate_all(struct qce_dma_data *dma);
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struct scatterlist *
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qce_sgtable_add(struct sg_table *sgt, struct scatterlist *sg_add);
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#endif /* _DMA_H_ */
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