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