drivers/crypto/caam/sg_sw_qm2.h

   1 /*
   2  * Copyright 2015-2016 Freescale Semiconductor, Inc.
   3  * Copyright 2017 NXP
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions are met:
   7  *     * Redistributions of source code must retain the above copyright
   8  *       notice, this list of conditions and the following disclaimer.
   9  *     * Redistributions in binary form must reproduce the above copyright
  10  *       notice, this list of conditions and the following disclaimer in the
  11  *       documentation and/or other materials provided with the distribution.
  12  *     * Neither the names of the above-listed copyright holders nor the
  13  *       names of any contributors may be used to endorse or promote products
  14  *       derived from this software without specific prior written permission.
  15  *
  16  *
  17  * ALTERNATIVELY, this software may be distributed under the terms of the
  18  * GNU General Public License ("GPL") as published by the Free Software
  19  * Foundation, either version 2 of that License or (at your option) any
  20  * later version.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  23  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  25  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE
  26  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  27  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  28  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  29  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  30  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  31  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  32  * POSSIBILITY OF SUCH DAMAGE.
  33  */
  34
  35 #ifndef _SG_SW_QM2_H_
  36 #define _SG_SW_QM2_H_
  37
  38 #include <soc/fsl/dpaa2-fd.h>
  39
  40 static inline void dma_to_qm_sg_one(struct dpaa2_sg_entry *qm_sg_ptr,
  41                                     dma_addr_t dma, u32 len, u16 offset)
  42 {
  43         dpaa2_sg_set_addr(qm_sg_ptr, dma);
  44         dpaa2_sg_set_format(qm_sg_ptr, dpaa2_sg_single);
  45         dpaa2_sg_set_final(qm_sg_ptr, false);
  46         dpaa2_sg_set_len(qm_sg_ptr, len);
  47         dpaa2_sg_set_bpid(qm_sg_ptr, 0);
  48         dpaa2_sg_set_offset(qm_sg_ptr, offset);
  49 }
  50
  51 /*
  52  * convert scatterlist to h/w link table format
  53  * but does not have final bit; instead, returns last entry
  54  */
  55 static inline struct dpaa2_sg_entry *
  56 sg_to_qm_sg(struct scatterlist *sg, int sg_count,
  57             struct dpaa2_sg_entry *qm_sg_ptr, u16 offset)
  58 {
  59         while (sg_count && sg) {
  60                 dma_to_qm_sg_one(qm_sg_ptr, sg_dma_address(sg),
  61                                  sg_dma_len(sg), offset);
  62                 qm_sg_ptr++;
  63                 sg = sg_next(sg);
  64                 sg_count--;
  65         }
  66         return qm_sg_ptr - 1;
  67 }
  68
  69 /*
  70  * convert scatterlist to h/w link table format
  71  * scatterlist must have been previously dma mapped
  72  */
  73 static inline void sg_to_qm_sg_last(struct scatterlist *sg, int sg_count,
  74                                     struct dpaa2_sg_entry *qm_sg_ptr,
  75                                     u16 offset)
  76 {
  77         qm_sg_ptr = sg_to_qm_sg(sg, sg_count, qm_sg_ptr, offset);
  78         dpaa2_sg_set_final(qm_sg_ptr, true);
  79 }
  80
  81 #endif /* _SG_SW_QM2_H_ */