LXR linux/drivers/crypto/caam/sg_sw

   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
  40static 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
  49static 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
  56static 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
  63static 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
  70static 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 */
  83static inline struct qm_sg_entry *
  84sg_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 */
 101static 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 */
 109