drivers/crypto/caam/sg_sw_qm2.h

   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
  12 static 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  */
  27 static inline struct dpaa2_sg_entry *
  28 sg_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  */
  49 static 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_ */