drivers/crypto/qce/dma.h

   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_ */