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/*
* caam - Freescale FSL CAAM support for Public Key Cryptography descriptors
*
* Copyright 2016 Freescale Semiconductor, Inc.
*
* There is no Shared Descriptor for PKC so that the Job Descriptor must carry
* all the desired key parameters, input and output pointers.
*/
#ifndef _PKC_DESC_H_
#define _PKC_DESC_H_
#include "compat.h"
#include "pdb.h"
/**
* caam_rsa_key - CAAM RSA key structure. Keys are allocated in DMA zone.
* @n : RSA modulus raw byte stream
* @e : RSA public exponent raw byte stream
* @d : RSA private exponent raw byte stream
* @n_sz : length in bytes of RSA modulus n
* @e_sz : length in bytes of RSA public exponent
* @d_sz : length in bytes of RSA private exponent
*/
struct caam_rsa_key {
u8 *n;
u8 *e;
u8 *d;
size_t n_sz;
size_t e_sz;
size_t d_sz;
};
/**
* caam_rsa_ctx - per session context.
* @key : RSA key in DMA zone
* @dev : device structure
*/
struct caam_rsa_ctx {
struct caam_rsa_key key;
struct device *dev;
};
/**
* rsa_edesc - s/w-extended rsa descriptor
* @src_nents : number of segments in input scatterlist
* @dst_nents : number of segments in output scatterlist
* @sec4_sg_bytes : length of h/w link table
* @sec4_sg_dma : dma address of h/w link table
* @sec4_sg : pointer to h/w link table
* @pdb : specific RSA Protocol Data Block (PDB)
* @hw_desc : descriptor followed by link tables if any
*/
struct rsa_edesc {
int src_nents;
int dst_nents;
int sec4_sg_bytes;
dma_addr_t sec4_sg_dma;
struct sec4_sg_entry *sec4_sg;
union {
struct rsa_pub_pdb pub;
struct rsa_priv_f1_pdb priv_f1;
} pdb;
u32 hw_desc[];
};
/* Descriptor construction primitives. */
void init_rsa_pub_desc(u32 *desc, struct rsa_pub_pdb *pdb);
void init_rsa_priv_f1_desc(u32 *desc, struct rsa_priv_f1_pdb *pdb);
#endif
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