| 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
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| 2 | /* |
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| 3 | * Copyright (c) 2011-2014, The Linux Foundation. All rights reserved. |
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| 4 | */ |
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| 5 | |
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| 6 | #ifndef _DMA_H_ |
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| 7 | #define _DMA_H_ |
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| 8 | |
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| 9 | #include <linux/dmaengine.h> |
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| 10 | |
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| 11 | /* maximum data transfer block size between BAM and CE */ |
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| 12 | #define QCE_BAM_BURST_SIZE 64 |
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| 13 | |
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| 14 | #define QCE_AUTHIV_REGS_CNT 16 |
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| 15 | #define QCE_AUTH_BYTECOUNT_REGS_CNT 4 |
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| 16 | #define QCE_CNTRIV_REGS_CNT 4 |
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| 17 | |
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| 18 | struct qce_result_dump { |
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| 19 | u32 auth_iv[QCE_AUTHIV_REGS_CNT]; |
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| 20 | u32 auth_byte_count[QCE_AUTH_BYTECOUNT_REGS_CNT]; |
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| 21 | u32 encr_cntr_iv[QCE_CNTRIV_REGS_CNT]; |
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| 22 | u32 status; |
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| 23 | u32 status2; |
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| 24 | }; |
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| 25 | |
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| 26 | #define QCE_IGNORE_BUF_SZ (2 * QCE_BAM_BURST_SIZE) |
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| 27 | #define QCE_RESULT_BUF_SZ \ |
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| 28 | ALIGN(sizeof(struct qce_result_dump), QCE_BAM_BURST_SIZE) |
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| 29 | |
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| 30 | struct qce_dma_data { |
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| 31 | struct dma_chan *txchan; |
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| 32 | struct dma_chan *rxchan; |
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| 33 | struct qce_result_dump *result_buf; |
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| 34 | void *ignore_buf; |
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| 35 | }; |
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| 36 | |
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| 37 | int qce_dma_request(struct device *dev, struct qce_dma_data *dma); |
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| 38 | void qce_dma_release(struct qce_dma_data *dma); |
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| 39 | int qce_dma_prep_sgs(struct qce_dma_data *dma, struct scatterlist *sg_in, |
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| 40 | int in_ents, struct scatterlist *sg_out, int out_ents, |
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| 41 | dma_async_tx_callback cb, void *cb_param); |
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| 42 | void qce_dma_issue_pending(struct qce_dma_data *dma); |
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| 43 | int qce_dma_terminate_all(struct qce_dma_data *dma); |
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| 44 | struct scatterlist * |
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| 45 | qce_sgtable_add(struct sg_table *sgt, struct scatterlist *sg_add, |
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| 46 | unsigned int max_len); |
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| 47 | |
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| 48 | #endif /* _DMA_H_ */ |
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| 49 | |
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