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 <soc/fsl/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
  39        print_hex_dump_debug("sec4_sg_ptr@: ", DUMP_PREFIX_ADDRESS, 16, 4,
  40                             sec4_sg_ptr, sizeof(struct sec4_sg_entry), 1);
  41}
  42
  43/*
  44 * convert scatterlist to h/w link table format
  45 * but does not have final bit; instead, returns last entry
  46 */
  47static inline struct sec4_sg_entry *
  48sg_to_sec4_sg(struct scatterlist *sg, int len,
  49              struct sec4_sg_entry *sec4_sg_ptr, u16 offset)
  50{
  51        int ent_len;
  52
  53        while (len) {
  54                ent_len = min_t(int, sg_dma_len(sg), len);
  55
  56                dma_to_sec4_sg_one(sec4_sg_ptr, sg_dma_address(sg), ent_len,
  57                                   offset);
  58                sec4_sg_ptr++;
  59                sg = sg_next(sg);
  60                len -= ent_len;
  61        }
  62        return sec4_sg_ptr - 1;
  63}
  64
  65static inline void sg_to_sec4_set_last(struct sec4_sg_entry *sec4_sg_ptr)
  66{
  67        if (caam_dpaa2)
  68                dpaa2_sg_set_final((struct dpaa2_sg_entry *)sec4_sg_ptr, true);
  69        else
  70                sec4_sg_ptr->len |= cpu_to_caam32(SEC4_SG_LEN_FIN);
  71}
  72
  73/*
  74 * convert scatterlist to h/w link table format
  75 * scatterlist must have been previously dma mapped
  76 */
  77static inline void sg_to_sec4_sg_last(struct scatterlist *sg, int len,
  78                                      struct sec4_sg_entry *sec4_sg_ptr,
  79                                      u16 offset)
  80{
  81        sec4_sg_ptr = sg_to_sec4_sg(sg, len, sec4_sg_ptr, offset);
  82        sg_to_sec4_set_last(sec4_sg_ptr);
  83}
  84
  85#endif /* _SG_SW_SEC4_H_ */
  86