drivers/crypto/chelsio/chcr_crypto.h - arm/linux - Git at Google

 /*
  * This file is part of the Chelsio T6 Crypto driver for Linux.
  *
  * Copyright (c) 2003-2016 Chelsio Communications, Inc. All rights reserved.
  *
  * This software is available to you under a choice of one of two
  * licenses.  You may choose to be licensed under the terms of the GNU
  * General Public License (GPL) Version 2, available from the file
  * COPYING in the main directory of this source tree, or the
  * OpenIB.org BSD license below:
  *
  *     Redistribution and use in source and binary forms, with or
  *     without modification, are permitted provided that the following
  *     conditions are met:
  *
  *      - Redistributions of source code must retain the above
  *        copyright notice, this list of conditions and the following
  *        disclaimer.
  *
  *      - Redistributions in binary form must reproduce the above
  *        copyright notice, this list of conditions and the following
  *        disclaimer in the documentation and/or other materials
  *        provided with the distribution.
  *
  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  * SOFTWARE.
  *
  */

 #ifndef __CHCR_CRYPTO_H__
 #define __CHCR_CRYPTO_H__

 #define GHASH_BLOCK_SIZE    16
 #define GHASH_DIGEST_SIZE   16

 #define CCM_B0_SIZE             16
 #define CCM_AAD_FIELD_SIZE      2
 #define T6_MAX_AAD_SIZE 511


 /* Define following if h/w is not dropping the AAD and IV data before
  * giving the processed data
  */

 #define CHCR_CRA_PRIORITY 500
 #define CHCR_AEAD_PRIORITY 6000
 #define CHCR_AES_MAX_KEY_LEN  (2 * (AES_MAX_KEY_SIZE)) /* consider xts */
 #define CHCR_MAX_CRYPTO_IV_LEN 16 /* AES IV len */

 #define CHCR_MAX_AUTHENC_AES_KEY_LEN 32 /* max aes key length*/
 #define CHCR_MAX_AUTHENC_SHA_KEY_LEN 128 /* max sha key length*/

 #define CHCR_GIVENCRYPT_OP 2
 /* CPL/SCMD parameters */

 #define CHCR_ENCRYPT_OP 0
 #define CHCR_DECRYPT_OP 1

 #define CHCR_SCMD_SEQ_NO_CTRL_32BIT     1
 #define CHCR_SCMD_SEQ_NO_CTRL_48BIT     2
 #define CHCR_SCMD_SEQ_NO_CTRL_64BIT     3

 #define CHCR_SCMD_PROTO_VERSION_GENERIC 4

 #define CHCR_SCMD_AUTH_CTRL_AUTH_CIPHER 0
 #define CHCR_SCMD_AUTH_CTRL_CIPHER_AUTH 1

 #define CHCR_SCMD_CIPHER_MODE_NOP               0
 #define CHCR_SCMD_CIPHER_MODE_AES_CBC           1
 #define CHCR_SCMD_CIPHER_MODE_AES_GCM           2
 #define CHCR_SCMD_CIPHER_MODE_AES_CTR           3
 #define CHCR_SCMD_CIPHER_MODE_GENERIC_AES       4
 #define CHCR_SCMD_CIPHER_MODE_AES_XTS           6
 #define CHCR_SCMD_CIPHER_MODE_AES_CCM           7

 #define CHCR_SCMD_AUTH_MODE_NOP             0
 #define CHCR_SCMD_AUTH_MODE_SHA1            1
 #define CHCR_SCMD_AUTH_MODE_SHA224          2
 #define CHCR_SCMD_AUTH_MODE_SHA256          3
 #define CHCR_SCMD_AUTH_MODE_GHASH           4
 #define CHCR_SCMD_AUTH_MODE_SHA512_224      5
 #define CHCR_SCMD_AUTH_MODE_SHA512_256      6
 #define CHCR_SCMD_AUTH_MODE_SHA512_384      7
 #define CHCR_SCMD_AUTH_MODE_SHA512_512      8
 #define CHCR_SCMD_AUTH_MODE_CBCMAC          9
 #define CHCR_SCMD_AUTH_MODE_CMAC            10

 #define CHCR_SCMD_HMAC_CTRL_NOP             0
 #define CHCR_SCMD_HMAC_CTRL_NO_TRUNC        1
 #define CHCR_SCMD_HMAC_CTRL_TRUNC_RFC4366   2
 #define CHCR_SCMD_HMAC_CTRL_IPSEC_96BIT     3
 #define CHCR_SCMD_HMAC_CTRL_PL1		    4
 #define CHCR_SCMD_HMAC_CTRL_PL2		    5
 #define CHCR_SCMD_HMAC_CTRL_PL3		    6
 #define CHCR_SCMD_HMAC_CTRL_DIV2	    7
 #define VERIFY_HW 0
 #define VERIFY_SW 1

 #define CHCR_SCMD_IVGEN_CTRL_HW             0
 #define CHCR_SCMD_IVGEN_CTRL_SW             1
 /* This are not really mac key size. They are intermediate values
  * of sha engine and its size
  */
 #define CHCR_KEYCTX_MAC_KEY_SIZE_128        0
 #define CHCR_KEYCTX_MAC_KEY_SIZE_160        1
 #define CHCR_KEYCTX_MAC_KEY_SIZE_192        2
 #define CHCR_KEYCTX_MAC_KEY_SIZE_256        3
 #define CHCR_KEYCTX_MAC_KEY_SIZE_512        4
 #define CHCR_KEYCTX_CIPHER_KEY_SIZE_128     0
 #define CHCR_KEYCTX_CIPHER_KEY_SIZE_192     1
 #define CHCR_KEYCTX_CIPHER_KEY_SIZE_256     2
 #define CHCR_KEYCTX_NO_KEY                  15

 #define CHCR_CPL_FW4_PLD_IV_OFFSET          (5 * 64) /* bytes. flt #5 and #6 */
 #define CHCR_CPL_FW4_PLD_HASH_RESULT_OFFSET (7 * 64) /* bytes. flt #7 */
 #define CHCR_CPL_FW4_PLD_DATA_SIZE          (4 * 64) /* bytes. flt #4 to #7 */

 #define KEY_CONTEXT_HDR_SALT_AND_PAD	    16
 #define flits_to_bytes(x)  (x * 8)

 #define IV_NOP                  0
 #define IV_IMMEDIATE            1
 #define IV_DSGL			2

 #define AEAD_H_SIZE             16

 #define CRYPTO_ALG_SUB_TYPE_MASK            0x0f000000
 #define CRYPTO_ALG_SUB_TYPE_HASH_HMAC       0x01000000
 #define CRYPTO_ALG_SUB_TYPE_AEAD_RFC4106    0x02000000
 #define CRYPTO_ALG_SUB_TYPE_AEAD_GCM	    0x03000000
 #define CRYPTO_ALG_SUB_TYPE_AEAD_AUTHENC    0x04000000
 #define CRYPTO_ALG_SUB_TYPE_AEAD_CCM        0x05000000
 #define CRYPTO_ALG_SUB_TYPE_AEAD_RFC4309    0x06000000
 #define CRYPTO_ALG_SUB_TYPE_AEAD_NULL       0x07000000
 #define CRYPTO_ALG_SUB_TYPE_CTR             0x08000000
 #define CRYPTO_ALG_SUB_TYPE_CTR_RFC3686     0x09000000
 #define CRYPTO_ALG_SUB_TYPE_XTS		    0x0a000000
 #define CRYPTO_ALG_SUB_TYPE_CBC		    0x0b000000
 #define CRYPTO_ALG_TYPE_HMAC (CRYPTO_ALG_TYPE_AHASH |\
 			      CRYPTO_ALG_SUB_TYPE_HASH_HMAC)

 #define MAX_SCRATCH_PAD_SIZE    32

 #define CHCR_HASH_MAX_BLOCK_SIZE_64  64
 #define CHCR_HASH_MAX_BLOCK_SIZE_128 128
 #define CHCR_SG_SIZE 2048

 /* Aligned to 128 bit boundary */

 struct ablk_ctx {
 	struct crypto_skcipher *sw_cipher;
 	struct crypto_cipher *aes_generic;
 	__be32 key_ctx_hdr;
 	unsigned int enckey_len;
 	unsigned char ciph_mode;
 	u8 key[CHCR_AES_MAX_KEY_LEN];
 	u8 nonce[4];
 	u8 rrkey[AES_MAX_KEY_SIZE];
 };
 struct chcr_aead_reqctx {
 	struct	sk_buff	*skb;
 	struct scatterlist *dst;
 	struct scatterlist *newdstsg;
 	struct scatterlist srcffwd[2];
 	struct scatterlist dstffwd[2];
 	short int dst_nents;
 	u16 verify;
 	u8 iv[CHCR_MAX_CRYPTO_IV_LEN];
 	unsigned char scratch_pad[MAX_SCRATCH_PAD_SIZE];
 };

 struct chcr_gcm_ctx {
 	u8 ghash_h[AEAD_H_SIZE];
 };

 struct chcr_authenc_ctx {
 	u8 dec_rrkey[AES_MAX_KEY_SIZE];
 	u8 h_iopad[2 * CHCR_HASH_MAX_DIGEST_SIZE];
 	unsigned char auth_mode;
 };

 struct __aead_ctx {
 	struct chcr_gcm_ctx gcm[0];
 	struct chcr_authenc_ctx authenc[0];
 };


 struct chcr_aead_ctx {
 	__be32 key_ctx_hdr;
 	unsigned int enckey_len;
 	struct crypto_skcipher *null;
 	struct crypto_aead *sw_cipher;
 	u8 salt[MAX_SALT];
 	u8 key[CHCR_AES_MAX_KEY_LEN];
 	u16 hmac_ctrl;
 	u16 mayverify;
 	struct	__aead_ctx ctx[0];
 };


 struct hmac_ctx {
 	struct crypto_shash *base_hash;
 	u8 ipad[CHCR_HASH_MAX_BLOCK_SIZE_128];
 	u8 opad[CHCR_HASH_MAX_BLOCK_SIZE_128];
 };

 struct __crypto_ctx {
 	struct hmac_ctx hmacctx[0];
 	struct ablk_ctx ablkctx[0];
 	struct chcr_aead_ctx aeadctx[0];
 };

 struct chcr_context {
 	struct chcr_dev *dev;
 	unsigned char tx_qidx;
 	unsigned char rx_qidx;
 	struct __crypto_ctx crypto_ctx[0];
 };

 struct chcr_ahash_req_ctx {
 	u32 result;
 	u8 bfr1[CHCR_HASH_MAX_BLOCK_SIZE_128];
 	u8 bfr2[CHCR_HASH_MAX_BLOCK_SIZE_128];
 	u8 *reqbfr;
 	u8 *skbfr;
 	u8 reqlen;
 	/* DMA the partial hash in it */
 	u8 partial_hash[CHCR_HASH_MAX_DIGEST_SIZE];
 	u64 data_len;  /* Data len till time */
 	/* SKB which is being sent to the hardware for processing */
 	struct sk_buff *skb;
 };

 struct chcr_blkcipher_req_ctx {
 	struct sk_buff *skb;
 	struct scatterlist srcffwd[2];
 	struct scatterlist dstffwd[2];
 	struct scatterlist *dstsg;
 	struct scatterlist *dst;
 	struct scatterlist *newdstsg;
 	unsigned int processed;
 	unsigned int op;
 	short int dst_nents;
 	u8 iv[CHCR_MAX_CRYPTO_IV_LEN];
 };

 struct chcr_alg_template {
 	u32 type;
 	u32 is_registered;
 	union {
 		struct crypto_alg crypto;
 		struct ahash_alg hash;
 		struct aead_alg aead;
 	} alg;
 };

 struct chcr_req_ctx {
 	union {
 		struct ahash_request *ahash_req;
 		struct aead_request *aead_req;
 		struct ablkcipher_request *ablk_req;
 	} req;
 	union {
 		struct chcr_ahash_req_ctx *ahash_ctx;
 		struct chcr_aead_reqctx *reqctx;
 		struct chcr_blkcipher_req_ctx *ablk_ctx;
 	} ctx;
 };

 struct sge_opaque_hdr {
 	void *dev;
 	dma_addr_t addr[MAX_SKB_FRAGS + 1];
 };

 typedef struct sk_buff *(*create_wr_t)(struct aead_request *req,
 				       unsigned short qid,
 				       int size,
 				       unsigned short op_type);

 static int chcr_aead_op(struct aead_request *req_base,
 			  unsigned short op_type,
 			  int size,
 			  create_wr_t create_wr_fn);
 static inline int get_aead_subtype(struct crypto_aead *aead);
 static int is_newsg(struct scatterlist *sgl, unsigned int *newents);
 static struct scatterlist *alloc_new_sg(struct scatterlist *sgl,
 					unsigned int nents);
 static inline void free_new_sg(struct scatterlist *sgl);
 static int chcr_handle_cipher_resp(struct ablkcipher_request *req,
 				   unsigned char *input, int err);
 #endif /* __CHCR_CRYPTO_H__ */
	/*
	* This file is part of the Chelsio T6 Crypto driver for Linux.
	*
	* Copyright (c) 2003-2016 Chelsio Communications, Inc. All rights reserved.
	*
	* This software is available to you under a choice of one of two
	* licenses. You may choose to be licensed under the terms of the GNU
	* General Public License (GPL) Version 2, available from the file
	* COPYING in the main directory of this source tree, or the
	* OpenIB.org BSD license below:
	*
	* Redistribution and use in source and binary forms, with or
	* without modification, are permitted provided that the following
	* conditions are met:
	*
	* - Redistributions of source code must retain the above
	* copyright notice, this list of conditions and the following
	* disclaimer.
	*
	* - Redistributions in binary form must reproduce the above
	* copyright notice, this list of conditions and the following
	* disclaimer in the documentation and/or other materials
	* provided with the distribution.
	*
	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
	* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
	* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
	* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
	* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
	* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
	* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
	* SOFTWARE.
	*
	*/

	#ifndef __CHCR_CRYPTO_H__
	#define __CHCR_CRYPTO_H__

	#define GHASH_BLOCK_SIZE 16
	#define GHASH_DIGEST_SIZE 16

	#define CCM_B0_SIZE 16
	#define CCM_AAD_FIELD_SIZE 2
	#define T6_MAX_AAD_SIZE 511


	/* Define following if h/w is not dropping the AAD and IV data before
	* giving the processed data
	*/

	#define CHCR_CRA_PRIORITY 500
	#define CHCR_AEAD_PRIORITY 6000
	#define CHCR_AES_MAX_KEY_LEN (2 * (AES_MAX_KEY_SIZE)) /* consider xts */
	#define CHCR_MAX_CRYPTO_IV_LEN 16 /* AES IV len */

	#define CHCR_MAX_AUTHENC_AES_KEY_LEN 32 /* max aes key length*/
	#define CHCR_MAX_AUTHENC_SHA_KEY_LEN 128 /* max sha key length*/

	#define CHCR_GIVENCRYPT_OP 2
	/* CPL/SCMD parameters */

	#define CHCR_ENCRYPT_OP 0
	#define CHCR_DECRYPT_OP 1

	#define CHCR_SCMD_SEQ_NO_CTRL_32BIT 1
	#define CHCR_SCMD_SEQ_NO_CTRL_48BIT 2
	#define CHCR_SCMD_SEQ_NO_CTRL_64BIT 3

	#define CHCR_SCMD_PROTO_VERSION_GENERIC 4

	#define CHCR_SCMD_AUTH_CTRL_AUTH_CIPHER 0
	#define CHCR_SCMD_AUTH_CTRL_CIPHER_AUTH 1

	#define CHCR_SCMD_CIPHER_MODE_NOP 0
	#define CHCR_SCMD_CIPHER_MODE_AES_CBC 1
	#define CHCR_SCMD_CIPHER_MODE_AES_GCM 2
	#define CHCR_SCMD_CIPHER_MODE_AES_CTR 3
	#define CHCR_SCMD_CIPHER_MODE_GENERIC_AES 4
	#define CHCR_SCMD_CIPHER_MODE_AES_XTS 6
	#define CHCR_SCMD_CIPHER_MODE_AES_CCM 7

	#define CHCR_SCMD_AUTH_MODE_NOP 0
	#define CHCR_SCMD_AUTH_MODE_SHA1 1
	#define CHCR_SCMD_AUTH_MODE_SHA224 2
	#define CHCR_SCMD_AUTH_MODE_SHA256 3
	#define CHCR_SCMD_AUTH_MODE_GHASH 4
	#define CHCR_SCMD_AUTH_MODE_SHA512_224 5
	#define CHCR_SCMD_AUTH_MODE_SHA512_256 6
	#define CHCR_SCMD_AUTH_MODE_SHA512_384 7
	#define CHCR_SCMD_AUTH_MODE_SHA512_512 8
	#define CHCR_SCMD_AUTH_MODE_CBCMAC 9
	#define CHCR_SCMD_AUTH_MODE_CMAC 10

	#define CHCR_SCMD_HMAC_CTRL_NOP 0
	#define CHCR_SCMD_HMAC_CTRL_NO_TRUNC 1
	#define CHCR_SCMD_HMAC_CTRL_TRUNC_RFC4366 2
	#define CHCR_SCMD_HMAC_CTRL_IPSEC_96BIT 3
	#define CHCR_SCMD_HMAC_CTRL_PL1 4
	#define CHCR_SCMD_HMAC_CTRL_PL2 5
	#define CHCR_SCMD_HMAC_CTRL_PL3 6
	#define CHCR_SCMD_HMAC_CTRL_DIV2 7
	#define VERIFY_HW 0
	#define VERIFY_SW 1

	#define CHCR_SCMD_IVGEN_CTRL_HW 0
	#define CHCR_SCMD_IVGEN_CTRL_SW 1
	/* This are not really mac key size. They are intermediate values
	* of sha engine and its size
	*/
	#define CHCR_KEYCTX_MAC_KEY_SIZE_128 0
	#define CHCR_KEYCTX_MAC_KEY_SIZE_160 1
	#define CHCR_KEYCTX_MAC_KEY_SIZE_192 2
	#define CHCR_KEYCTX_MAC_KEY_SIZE_256 3
	#define CHCR_KEYCTX_MAC_KEY_SIZE_512 4
	#define CHCR_KEYCTX_CIPHER_KEY_SIZE_128 0
	#define CHCR_KEYCTX_CIPHER_KEY_SIZE_192 1
	#define CHCR_KEYCTX_CIPHER_KEY_SIZE_256 2
	#define CHCR_KEYCTX_NO_KEY 15

	#define CHCR_CPL_FW4_PLD_IV_OFFSET (5 * 64) /* bytes. flt #5 and #6 */
	#define CHCR_CPL_FW4_PLD_HASH_RESULT_OFFSET (7 * 64) /* bytes. flt #7 */
	#define CHCR_CPL_FW4_PLD_DATA_SIZE (4 * 64) /* bytes. flt #4 to #7 */

	#define KEY_CONTEXT_HDR_SALT_AND_PAD 16
	#define flits_to_bytes(x) (x * 8)

	#define IV_NOP 0
	#define IV_IMMEDIATE 1
	#define IV_DSGL 2

	#define AEAD_H_SIZE 16

	#define CRYPTO_ALG_SUB_TYPE_MASK 0x0f000000
	#define CRYPTO_ALG_SUB_TYPE_HASH_HMAC 0x01000000
	#define CRYPTO_ALG_SUB_TYPE_AEAD_RFC4106 0x02000000
	#define CRYPTO_ALG_SUB_TYPE_AEAD_GCM 0x03000000
	#define CRYPTO_ALG_SUB_TYPE_AEAD_AUTHENC 0x04000000
	#define CRYPTO_ALG_SUB_TYPE_AEAD_CCM 0x05000000
	#define CRYPTO_ALG_SUB_TYPE_AEAD_RFC4309 0x06000000
	#define CRYPTO_ALG_SUB_TYPE_AEAD_NULL 0x07000000
	#define CRYPTO_ALG_SUB_TYPE_CTR 0x08000000
	#define CRYPTO_ALG_SUB_TYPE_CTR_RFC3686 0x09000000
	#define CRYPTO_ALG_SUB_TYPE_XTS 0x0a000000
	#define CRYPTO_ALG_SUB_TYPE_CBC 0x0b000000
	#define CRYPTO_ALG_TYPE_HMAC (CRYPTO_ALG_TYPE_AHASH \|\
	CRYPTO_ALG_SUB_TYPE_HASH_HMAC)

	#define MAX_SCRATCH_PAD_SIZE 32

	#define CHCR_HASH_MAX_BLOCK_SIZE_64 64
	#define CHCR_HASH_MAX_BLOCK_SIZE_128 128
	#define CHCR_SG_SIZE 2048

	/* Aligned to 128 bit boundary */

	struct ablk_ctx {
	struct crypto_skcipher *sw_cipher;
	struct crypto_cipher *aes_generic;
	__be32 key_ctx_hdr;
	unsigned int enckey_len;
	unsigned char ciph_mode;
	u8 key[CHCR_AES_MAX_KEY_LEN];
	u8 nonce[4];
	u8 rrkey[AES_MAX_KEY_SIZE];
	};
	struct chcr_aead_reqctx {
	struct sk_buff *skb;
	struct scatterlist *dst;
	struct scatterlist *newdstsg;
	struct scatterlist srcffwd[2];
	struct scatterlist dstffwd[2];
	short int dst_nents;
	u16 verify;
	u8 iv[CHCR_MAX_CRYPTO_IV_LEN];
	unsigned char scratch_pad[MAX_SCRATCH_PAD_SIZE];
	};

	struct chcr_gcm_ctx {
	u8 ghash_h[AEAD_H_SIZE];
	};

	struct chcr_authenc_ctx {
	u8 dec_rrkey[AES_MAX_KEY_SIZE];
	u8 h_iopad[2 * CHCR_HASH_MAX_DIGEST_SIZE];
	unsigned char auth_mode;
	};

	struct __aead_ctx {
	struct chcr_gcm_ctx gcm[0];
	struct chcr_authenc_ctx authenc[0];
	};



	struct chcr_aead_ctx {
	__be32 key_ctx_hdr;
	unsigned int enckey_len;
	struct crypto_skcipher *null;
	struct crypto_aead *sw_cipher;
	u8 salt[MAX_SALT];
	u8 key[CHCR_AES_MAX_KEY_LEN];
	u16 hmac_ctrl;
	u16 mayverify;
	struct __aead_ctx ctx[0];
	};



	struct hmac_ctx {
	struct crypto_shash *base_hash;
	u8 ipad[CHCR_HASH_MAX_BLOCK_SIZE_128];
	u8 opad[CHCR_HASH_MAX_BLOCK_SIZE_128];
	};

	struct __crypto_ctx {
	struct hmac_ctx hmacctx[0];
	struct ablk_ctx ablkctx[0];
	struct chcr_aead_ctx aeadctx[0];
	};

	struct chcr_context {
	struct chcr_dev *dev;
	unsigned char tx_qidx;
	unsigned char rx_qidx;
	struct __crypto_ctx crypto_ctx[0];
	};

	struct chcr_ahash_req_ctx {
	u32 result;
	u8 bfr1[CHCR_HASH_MAX_BLOCK_SIZE_128];
	u8 bfr2[CHCR_HASH_MAX_BLOCK_SIZE_128];
	u8 *reqbfr;
	u8 *skbfr;
	u8 reqlen;
	/* DMA the partial hash in it */
	u8 partial_hash[CHCR_HASH_MAX_DIGEST_SIZE];
	u64 data_len; /* Data len till time */
	/* SKB which is being sent to the hardware for processing */
	struct sk_buff *skb;
	};

	struct chcr_blkcipher_req_ctx {
	struct sk_buff *skb;
	struct scatterlist srcffwd[2];
	struct scatterlist dstffwd[2];
	struct scatterlist *dstsg;
	struct scatterlist *dst;
	struct scatterlist *newdstsg;
	unsigned int processed;
	unsigned int op;
	short int dst_nents;
	u8 iv[CHCR_MAX_CRYPTO_IV_LEN];
	};

	struct chcr_alg_template {
	u32 type;
	u32 is_registered;
	union {
	struct crypto_alg crypto;
	struct ahash_alg hash;
	struct aead_alg aead;
	} alg;
	};

	struct chcr_req_ctx {
	union {
	struct ahash_request *ahash_req;
	struct aead_request *aead_req;
	struct ablkcipher_request *ablk_req;
	} req;
	union {
	struct chcr_ahash_req_ctx *ahash_ctx;
	struct chcr_aead_reqctx *reqctx;
	struct chcr_blkcipher_req_ctx *ablk_ctx;
	} ctx;
	};

	struct sge_opaque_hdr {
	void *dev;
	dma_addr_t addr[MAX_SKB_FRAGS + 1];
	};

	typedef struct sk_buff (create_wr_t)(struct aead_request *req,
	unsigned short qid,
	int size,
	unsigned short op_type);

	static int chcr_aead_op(struct aead_request *req_base,
	unsigned short op_type,
	int size,
	create_wr_t create_wr_fn);
	static inline int get_aead_subtype(struct crypto_aead *aead);
	static int is_newsg(struct scatterlist sgl, unsigned int newents);
	static struct scatterlist alloc_new_sg(struct scatterlist sgl,
	unsigned int nents);
	static inline void free_new_sg(struct scatterlist *sgl);
	static int chcr_handle_cipher_resp(struct ablkcipher_request *req,
	unsigned char *input, int err);
	#endif /* __CHCR_CRYPTO_H__ */