drivers/crypto/caam/sg_sw_sec4.h

   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
  17 struct 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  */
  26 static 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  */
  47 static inline struct sec4_sg_entry *
  48 sg_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
  65 static 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  */
  77 static 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_ */