LXR linux/drivers/crypto/caam/sg_sw

   1/* SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause) */
   2/*
   3 * Copyright 2015-2016 Freescale Semiconductor, Inc.
   4 * Copyright 2017 NXP
   5 */
   6
   7#ifndef _SG_SW_QM2_H_
   8#define _SG_SW_QM2_H_
   9
  10#include <soc/fsl/dpaa2-fd.h>
  11
  12static inline void dma_to_qm_sg_one(struct dpaa2_sg_entry *qm_sg_ptr,
  13                                    dma_addr_t dma, u32 len, u16 offset)
  14{
  15        dpaa2_sg_set_addr(qm_sg_ptr, dma);
  16        dpaa2_sg_set_format(qm_sg_ptr, dpaa2_sg_single);
  17        dpaa2_sg_set_final(qm_sg_ptr, false);
  18        dpaa2_sg_set_len(qm_sg_ptr, len);
  19        dpaa2_sg_set_bpid(qm_sg_ptr, 0);
  20        dpaa2_sg_set_offset(qm_sg_ptr, offset);
  21}
  22
  23/*
  24 * convert scatterlist to h/w link table format
  25 * but does not have final bit; instead, returns last entry
  26 */
  27static inline struct dpaa2_sg_entry *
  28sg_to_qm_sg(struct scatterlist *sg, int len,
  29            struct dpaa2_sg_entry *qm_sg_ptr, u16 offset)
  30{
  31        int ent_len;
  32
  33        while (len) {
  34                ent_len = min_t(int, sg_dma_len(sg), len);
  35
  36                dma_to_qm_sg_one(qm_sg_ptr, sg_dma_address(sg), ent_len,
  37                                 offset);
  38                qm_sg_ptr++;
  39                sg = sg_next(sg);
  40                len -= ent_len;
  41        }
  42        return qm_sg_ptr - 1;
  43}
  44
  45/*
  46 * convert scatterlist to h/w link table format
  47 * scatterlist must have been previously dma mapped
  48 */
  49static inline void sg_to_qm_sg_last(struct scatterlist *sg, int len,
  50                                    struct dpaa2_sg_entry *qm_sg_ptr,
  51                                    u16 offset)
  52{
  53        qm_sg_ptr = sg_to_qm_sg(sg, len, qm_sg_ptr, offset);
  54        dpaa2_sg_set_final(qm_sg_ptr, true);
  55}
  56
  57#endif /* _SG_SW_QM2_H_ */
  58