[deliverable/linux.git] / drivers / crypto / qce / dma.h

/*
 * Copyright (c) 2011-2014, The Linux Foundation. All rights reserved.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 and
 * only version 2 as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 */

#ifndef _DMA_H_
#define _DMA_H_

#include <linux/dmaengine.h>

/* maximum data transfer block size between BAM and CE */
#define QCE_BAM_BURST_SIZE		64

#define QCE_AUTHIV_REGS_CNT		16
#define QCE_AUTH_BYTECOUNT_REGS_CNT	4
#define QCE_CNTRIV_REGS_CNT		4

struct qce_result_dump {
	u32 auth_iv[QCE_AUTHIV_REGS_CNT];
	u32 auth_byte_count[QCE_AUTH_BYTECOUNT_REGS_CNT];
	u32 encr_cntr_iv[QCE_CNTRIV_REGS_CNT];
	u32 status;
	u32 status2;
};

#define QCE_IGNORE_BUF_SZ	(2 * QCE_BAM_BURST_SIZE)
#define QCE_RESULT_BUF_SZ	\
		ALIGN(sizeof(struct qce_result_dump), QCE_BAM_BURST_SIZE)

struct qce_dma_data {
	struct dma_chan *txchan;
	struct dma_chan *rxchan;
	struct qce_result_dump *result_buf;
	void *ignore_buf;
};

int qce_dma_request(struct device *dev, struct qce_dma_data *dma);
void qce_dma_release(struct qce_dma_data *dma);
int qce_dma_prep_sgs(struct qce_dma_data *dma, struct scatterlist *sg_in,
		     int in_ents, struct scatterlist *sg_out, int out_ents,
		     dma_async_tx_callback cb, void *cb_param);
void qce_dma_issue_pending(struct qce_dma_data *dma);
int qce_dma_terminate_all(struct qce_dma_data *dma);
struct scatterlist *
qce_sgtable_add(struct sg_table *sgt, struct scatterlist *sg_add);

#endif /* _DMA_H_ */
Commit	Line	Data
ec8f5d8f SV	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
f89f4a06 LT	17	#include <linux/dmaengine.h>
f89f4a06 LT	18
ec8f5d8f SV	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);
ec8f5d8f SV	52	struct scatterlist *
	53	qce_sgtable_add(struct sg_table sgt, struct scatterlist sg_add);
	54
	55	#endif /* _DMA_H_ */