LXR linux/drivers/crypto/caam/sg_sw

   1/* SPDX-License-Identifier: GPL-2.0 */
   2/*
   3 * CAAM/SEC 4.x functions for using scatterlists in caam driver
   4 *
   5 * Copyright 2008-2011 Freescale Semiconductor, Inc.
   6 *
   7 */
   8
   9#ifndef _SG_SW_SEC4_H_
  10#define _SG_SW_SEC4_H_
  11
  12#include "ctrl.h"
  13#include "regs.h"
  14#include "sg_sw_qm2.h"
  15#include "../../../drivers/staging/fsl-mc/include/dpaa2-fd.h"
  16
  17struct sec4_sg_entry {
  18        u64 ptr;
  19        u32 len;
  20        u32 bpid_offset;
  21};
  22
  23/*
  24 * convert single dma address to h/w link table format
  25 */
  26static inline void dma_to_sec4_sg_one(struct sec4_sg_entry *sec4_sg_ptr,
  27                                      dma_addr_t dma, u32 len, u16 offset)
  28{
  29        if (caam_dpaa2) {
  30                dma_to_qm_sg_one((struct dpaa2_sg_entry *)sec4_sg_ptr, dma, len,
  31                                 offset);
  32        } else {
  33                sec4_sg_ptr->ptr = cpu_to_caam_dma64(dma);
  34                sec4_sg_ptr->len = cpu_to_caam32(len);
  35                sec4_sg_ptr->bpid_offset = cpu_to_caam32(offset &
  36                                                         SEC4_SG_OFFSET_MASK);
  37        }
  38#ifdef DEBUG
  39        print_hex_dump(KERN_ERR, "sec4_sg_ptr@: ",
  40                       DUMP_PREFIX_ADDRESS, 16, 4, sec4_sg_ptr,
  41                       sizeof(struct sec4_sg_entry), 1);
  42#endif
  43}
  44
  45/*
  46 * convert scatterlist to h/w link table format
  47 * but does not have final bit; instead, returns last entry
  48 */
  49static inline struct sec4_sg_entry *
  50sg_to_sec4_sg(struct scatterlist *sg, int sg_count,
  51              struct sec4_sg_entry *sec4_sg_ptr, u16 offset)
  52{
  53        while (sg_count) {
  54                dma_to_sec4_sg_one(sec4_sg_ptr, sg_dma_address(sg),
  55                                   sg_dma_len(sg), offset);
  56                sec4_sg_ptr++;
  57                sg = sg_next(sg);
  58                sg_count--;
  59        }
  60        return sec4_sg_ptr - 1;
  61}
  62
  63static inline void sg_to_sec4_set_last(struct sec4_sg_entry *sec4_sg_ptr)
  64{
  65        if (caam_dpaa2)
  66                dpaa2_sg_set_final((struct dpaa2_sg_entry *)sec4_sg_ptr, true);
  67        else
  68                sec4_sg_ptr->len |= cpu_to_caam32(SEC4_SG_LEN_FIN);
  69}
  70
  71/*
  72 * convert scatterlist to h/w link table format
  73 * scatterlist must have been previously dma mapped
  74 */
  75static inline void sg_to_sec4_sg_last(struct scatterlist *sg, int sg_count,
  76                                      struct sec4_sg_entry *sec4_sg_ptr,
  77                                      u16 offset)
  78{
  79        sec4_sg_ptr = sg_to_sec4_sg(sg, sg_count, sec4_sg_ptr, offset);
  80        sg_to_sec4_set_last(sec4_sg_ptr);
  81}
  82
  83#endif /* _SG_SW_SEC4_H_ */
  84