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 sg_count,
  29             struct dpaa2_sg_entry *qm_sg_ptr, u16 offset)
  30 {
  31         while (sg_count && sg) {
  32                 dma_to_qm_sg_one(qm_sg_ptr, sg_dma_address(sg),
  33                                  sg_dma_len(sg), offset);
  34                 qm_sg_ptr++;
  35                 sg = sg_next(sg);
  36                 sg_count--;
  37         }
  38         return qm_sg_ptr - 1;
  39 }
  40
  41 /*
  42  * convert scatterlist to h/w link table format
  43  * scatterlist must have been previously dma mapped
  44  */
  45 static inline void sg_to_qm_sg_last(struct scatterlist *sg, int sg_count,
  46                                     struct dpaa2_sg_entry *qm_sg_ptr,
  47                                     u16 offset)
  48 {
  49         qm_sg_ptr = sg_to_qm_sg(sg, sg_count, qm_sg_ptr, offset);
  50         dpaa2_sg_set_final(qm_sg_ptr, true);
  51 }
  52
  53 #endif /* _SG_SW_QM2_H_ */