1 /* 2 * Copyright (c) 2011-2014, The Linux Foundation. All rights reserved. 3 * 4 * This program is free software; you can redistribute it and/or modify 5 * it under the terms of the GNU General Public License version 2 and 6 * only version 2 as published by the Free Software Foundation. 7 * 8 * This program is distributed in the hope that it will be useful, 9 * but WITHOUT ANY WARRANTY; without even the implied warranty of 10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 11 * GNU General Public License for more details. 12 */ 13 14 #ifndef _DMA_H_ 15 #define _DMA_H_ 16 17 #include <linux/dmaengine.h> 18 19 /* maximum data transfer block size between BAM and CE */ 20 #define QCE_BAM_BURST_SIZE 64 21 22 #define QCE_AUTHIV_REGS_CNT 16 23 #define QCE_AUTH_BYTECOUNT_REGS_CNT 4 24 #define QCE_CNTRIV_REGS_CNT 4 25 26 struct qce_result_dump { 27 u32 auth_iv[QCE_AUTHIV_REGS_CNT]; 28 u32 auth_byte_count[QCE_AUTH_BYTECOUNT_REGS_CNT]; 29 u32 encr_cntr_iv[QCE_CNTRIV_REGS_CNT]; 30 u32 status; 31 u32 status2; 32 }; 33 34 #define QCE_IGNORE_BUF_SZ (2 * QCE_BAM_BURST_SIZE) 35 #define QCE_RESULT_BUF_SZ \ 36 ALIGN(sizeof(struct qce_result_dump), QCE_BAM_BURST_SIZE) 37 38 struct qce_dma_data { 39 struct dma_chan *txchan; 40 struct dma_chan *rxchan; 41 struct qce_result_dump *result_buf; 42 void *ignore_buf; 43 }; 44 45 int qce_dma_request(struct device *dev, struct qce_dma_data *dma); 46 void qce_dma_release(struct qce_dma_data *dma); 47 int qce_dma_prep_sgs(struct qce_dma_data *dma, struct scatterlist *sg_in, 48 int in_ents, struct scatterlist *sg_out, int out_ents, 49 dma_async_tx_callback cb, void *cb_param); 50 void qce_dma_issue_pending(struct qce_dma_data *dma); 51 int qce_dma_terminate_all(struct qce_dma_data *dma); 52 int qce_countsg(struct scatterlist *sg_list, int nbytes, bool *chained); 53 void qce_unmapsg(struct device *dev, struct scatterlist *sg, int nents, 54 enum dma_data_direction dir, bool chained); 55 int qce_mapsg(struct device *dev, struct scatterlist *sg, int nents, 56 enum dma_data_direction dir, bool chained); 57 struct scatterlist * 58 qce_sgtable_add(struct sg_table *sgt, struct scatterlist *sg_add); 59 60 #endif /* _DMA_H_ */ 61