drivers/crypto/caam/sg_sw_sec4.h

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