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
26struct 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
38struct 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
45int qce_dma_request(struct device *dev, struct qce_dma_data *dma);
46void qce_dma_release(struct qce_dma_data *dma);
47int 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);
50void qce_dma_issue_pending(struct qce_dma_data *dma);
51int qce_dma_terminate_all(struct qce_dma_data *dma);
52int qce_countsg(struct scatterlist *sg_list, int nbytes, bool *chained);
53void qce_unmapsg(struct device *dev, struct scatterlist *sg, int nents,
54		 enum dma_data_direction dir, bool chained);
55int qce_mapsg(struct device *dev, struct scatterlist *sg, int nents,
56	      enum dma_data_direction dir, bool chained);
57struct scatterlist *
58qce_sgtable_add(struct sg_table *sgt, struct scatterlist *sg_add);
59
60#endif /* _DMA_H_ */
61