drivers/crypto/caam/sg_sw_qm.h

   1 /*
   2  * Copyright 2013-2016 Freescale Semiconductor, Inc.
   3  * Copyright 2016-2017 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 name of Freescale Semiconductor nor the
  13  *       names of its 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 Freescale Semiconductor ``AS IS'' AND ANY
  23  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  24  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  25  * DISCLAIMED. IN NO EVENT SHALL Freescale Semiconductor BE LIABLE FOR ANY
  26  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  27  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  28  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  29  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  30  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  31  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  32  */
  33
  34 #ifndef __SG_SW_QM_H
  35 #define __SG_SW_QM_H
  36
  37 #include <soc/fsl/qman.h>
  38 #include "regs.h"
  39
  40 static inline void __dma_to_qm_sg(struct qm_sg_entry *qm_sg_ptr, dma_addr_t dma,
  41                                   u16 offset)
  42 {
  43         qm_sg_entry_set64(qm_sg_ptr, dma);
  44         qm_sg_ptr->__reserved2 = 0;
  45         qm_sg_ptr->bpid = 0;
  46         qm_sg_ptr->offset = cpu_to_be16(offset & QM_SG_OFF_MASK);
  47 }
  48
  49 static inline void dma_to_qm_sg_one(struct qm_sg_entry *qm_sg_ptr,
  50                                     dma_addr_t dma, u32 len, u16 offset)
  51 {
  52         __dma_to_qm_sg(qm_sg_ptr, dma, offset);
  53         qm_sg_entry_set_len(qm_sg_ptr, len);
  54 }
  55
  56 static inline void dma_to_qm_sg_one_last(struct qm_sg_entry *qm_sg_ptr,
  57                                          dma_addr_t dma, u32 len, u16 offset)
  58 {
  59         __dma_to_qm_sg(qm_sg_ptr, dma, offset);
  60         qm_sg_entry_set_f(qm_sg_ptr, len);
  61 }
  62
  63 static inline void dma_to_qm_sg_one_ext(struct qm_sg_entry *qm_sg_ptr,
  64                                         dma_addr_t dma, u32 len, u16 offset)
  65 {
  66         __dma_to_qm_sg(qm_sg_ptr, dma, offset);
  67         qm_sg_ptr->cfg = cpu_to_be32(QM_SG_EXT | (len & QM_SG_LEN_MASK));
  68 }
  69
  70 static inline void dma_to_qm_sg_one_last_ext(struct qm_sg_entry *qm_sg_ptr,
  71                                              dma_addr_t dma, u32 len,
  72                                              u16 offset)
  73 {
  74         __dma_to_qm_sg(qm_sg_ptr, dma, offset);
  75         qm_sg_ptr->cfg = cpu_to_be32(QM_SG_EXT | QM_SG_FIN |
  76                                      (len & QM_SG_LEN_MASK));
  77 }
  78
  79 /*
  80  * convert scatterlist to h/w link table format
  81  * but does not have final bit; instead, returns last entry
  82  */
  83 static inline struct qm_sg_entry *
  84 sg_to_qm_sg(struct scatterlist *sg, int sg_count,
  85             struct qm_sg_entry *qm_sg_ptr, u16 offset)
  86 {
  87         while (sg_count && sg) {
  88                 dma_to_qm_sg_one(qm_sg_ptr, sg_dma_address(sg),
  89                                  sg_dma_len(sg), offset);
  90                 qm_sg_ptr++;
  91                 sg = sg_next(sg);
  92                 sg_count--;
  93         }
  94         return qm_sg_ptr - 1;
  95 }
  96
  97 /*
  98  * convert scatterlist to h/w link table format
  99  * scatterlist must have been previously dma mapped
 100  */
 101 static inline void sg_to_qm_sg_last(struct scatterlist *sg, int sg_count,
 102                                     struct qm_sg_entry *qm_sg_ptr, u16 offset)
 103 {
 104         qm_sg_ptr = sg_to_qm_sg(sg, sg_count, qm_sg_ptr, offset);
 105         qm_sg_entry_set_f(qm_sg_ptr, qm_sg_entry_get_len(qm_sg_ptr));
 106 }
 107
 108 #endif /* __SG_SW_QM_H */