drivers/crypto/caam/caampkc.h

   1 /*
   2  * caam - Freescale FSL CAAM support for Public Key Cryptography descriptors
   3  *
   4  * Copyright 2016 Freescale Semiconductor, Inc.
   5  *
   6  * There is no Shared Descriptor for PKC so that the Job Descriptor must carry
   7  * all the desired key parameters, input and output pointers.
   8  */
   9
  10 #ifndef _PKC_DESC_H_
  11 #define _PKC_DESC_H_
  12 #include "compat.h"
  13 #include "pdb.h"
  14
  15 /**
  16  * caam_rsa_key - CAAM RSA key structure. Keys are allocated in DMA zone.
  17  * @n           : RSA modulus raw byte stream
  18  * @e           : RSA public exponent raw byte stream
  19  * @d           : RSA private exponent raw byte stream
  20  * @n_sz        : length in bytes of RSA modulus n
  21  * @e_sz        : length in bytes of RSA public exponent
  22  * @d_sz        : length in bytes of RSA private exponent
  23  */
  24 struct caam_rsa_key {
  25         u8 *n;
  26         u8 *e;
  27         u8 *d;
  28         size_t n_sz;
  29         size_t e_sz;
  30         size_t d_sz;
  31 };
  32
  33 /**
  34  * caam_rsa_ctx - per session context.
  35  * @key         : RSA key in DMA zone
  36  * @dev         : device structure
  37  */
  38 struct caam_rsa_ctx {
  39         struct caam_rsa_key key;
  40         struct device *dev;
  41 };
  42
  43 /**
  44  * rsa_edesc - s/w-extended rsa descriptor
  45  * @src_nents     : number of segments in input scatterlist
  46  * @dst_nents     : number of segments in output scatterlist
  47  * @sec4_sg_bytes : length of h/w link table
  48  * @sec4_sg_dma   : dma address of h/w link table
  49  * @sec4_sg       : pointer to h/w link table
  50  * @pdb           : specific RSA Protocol Data Block (PDB)
  51  * @hw_desc       : descriptor followed by link tables if any
  52  */
  53 struct rsa_edesc {
  54         int src_nents;
  55         int dst_nents;
  56         int sec4_sg_bytes;
  57         dma_addr_t sec4_sg_dma;
  58         struct sec4_sg_entry *sec4_sg;
  59         union {
  60                 struct rsa_pub_pdb pub;
  61                 struct rsa_priv_f1_pdb priv_f1;
  62         } pdb;
  63         u32 hw_desc[];
  64 };
  65
  66 /* Descriptor construction primitives. */
  67 void init_rsa_pub_desc(u32 *desc, struct rsa_pub_pdb *pdb);
  68 void init_rsa_priv_f1_desc(u32 *desc, struct rsa_priv_f1_pdb *pdb);
  69
  70 #endif