LXR linux/drivers/crypto/qce/dma.h

   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