/*
   * Header file for SHA hardware acceleration
   *
   * Copyright (c) 2012  Samsung Electronics
   *
   * SPDX-License-Identifier:	GPL-2.0+
   */
  #ifndef __HW_SHA_H
  #define __HW_SHA_H
  #include <hash.h>
  
  /**
   * Computes hash value of input pbuf using h/w acceleration
   *
   * @param in_addr	A pointer to the input buffer
   * @param bufleni	Byte length of input buffer
   * @param out_addr	A pointer to the output buffer. When complete
   *			32 bytes are copied to pout[0]...pout[31]. Thus, a user
   *			should allocate at least 32 bytes at pOut in advance.
   * @param chunk_size	chunk size for sha256
   */
  void hw_sha256(const uchar * in_addr, uint buflen,
  			uchar * out_addr, uint chunk_size);
  
  /**
   * Computes hash value of input pbuf using h/w acceleration
   *
   * @param in_addr	A pointer to the input buffer
   * @param bufleni	Byte length of input buffer
   * @param out_addr	A pointer to the output buffer. When complete
   *			32 bytes are copied to pout[0]...pout[31]. Thus, a user
   *			should allocate at least 32 bytes at pOut in advance.
   * @param chunk_size	chunk_size for sha1
   */
  void hw_sha1(const uchar * in_addr, uint buflen,
  			uchar * out_addr, uint chunk_size);
  
  /*
   * Create the context for sha progressive hashing using h/w acceleration
   *
   * @algo: Pointer to the hash_algo struct
   * @ctxp: Pointer to the pointer of the context for hashing
   * @return 0 if ok, -ve on error
   */
  int hw_sha_init(struct hash_algo *algo, void **ctxp);
  
  /*
   * Update buffer for sha progressive hashing using h/w acceleration
   *
   * The context is freed by this function if an error occurs.
   *
   * @algo: Pointer to the hash_algo struct
   * @ctx: Pointer to the context for hashing
   * @buf: Pointer to the buffer being hashed
   * @size: Size of the buffer being hashed
   * @is_last: 1 if this is the last update; 0 otherwise
   * @return 0 if ok, -ve on error
   */
  int hw_sha_update(struct hash_algo *algo, void *ctx, const void *buf,
  		     unsigned int size, int is_last);
  
  /*
   * Copy sha hash result at destination location
   *
   * The context is freed after completion of hash operation or after an error.
   *
   * @algo: Pointer to the hash_algo struct
   * @ctx: Pointer to the context for hashing
   * @dest_buf: Pointer to the destination buffer where hash is to be copied
   * @size: Size of the buffer being hashed
   * @return 0 if ok, -ve on error
   */
  int hw_sha_finish(struct hash_algo *algo, void *ctx, void *dest_buf,
  		     int size);
  
  #endif