/* SPDX-License-Identifier: BSD-3-Clause
 * Copyright(c) 2015-2021 Intel Corporation
 */

#include "pmd_aesni_mb_priv.h"

struct aesni_mb_op_buf_data {
	struct rte_mbuf *m;
	uint32_t offset;
};

/**
 * Calculate the authentication pre-computes
 *
 * @param one_block_hash	Function pointer
 *				to calculate digest on ipad/opad
 * @param ipad			Inner pad output byte array
 * @param opad			Outer pad output byte array
 * @param hkey			Authentication key
 * @param hkey_len		Authentication key length
 * @param blocksize		Block size of selected hash algo
 */
static void
calculate_auth_precomputes(hash_one_block_t one_block_hash,
		uint8_t *ipad, uint8_t *opad,
		const uint8_t *hkey, uint16_t hkey_len,
		uint16_t blocksize)
{
	uint32_t i, length;

	uint8_t ipad_buf[blocksize] __rte_aligned(16);
	uint8_t opad_buf[blocksize] __rte_aligned(16);

	/* Setup inner and outer pads */
	memset(ipad_buf, HMAC_IPAD_VALUE, blocksize);
	memset(opad_buf, HMAC_OPAD_VALUE, blocksize);

	/* XOR hash key with inner and outer pads */
	length = hkey_len > blocksize ? blocksize : hkey_len;

	for (i = 0; i < length; i++) {
		ipad_buf[i] ^= hkey[i];
		opad_buf[i] ^= hkey[i];
	}

	/* Compute partial hashes */
	(*one_block_hash)(ipad_buf, ipad);
	(*one_block_hash)(opad_buf, opad);

	/* Clean up stack */
	memset(ipad_buf, 0, blocksize);
	memset(opad_buf, 0, blocksize);
}

static inline int
is_aead_algo(IMB_HASH_ALG hash_alg, IMB_CIPHER_MODE cipher_mode)
{
	return (hash_alg == IMB_AUTH_CHACHA20_POLY1305 ||
		hash_alg == IMB_AUTH_AES_CCM ||
		(hash_alg == IMB_AUTH_AES_GMAC &&
		cipher_mode == IMB_CIPHER_GCM));
}

/** Set session authentication parameters */
static int
aesni_mb_set_session_auth_parameters(const IMB_MGR *mb_mgr,
		struct aesni_mb_session *sess,
		const struct rte_crypto_sym_xform *xform)
{
	hash_one_block_t hash_oneblock_fn = NULL;
	unsigned int key_larger_block_size = 0;
	uint8_t hashed_key[HMAC_MAX_BLOCK_SIZE] = { 0 };
	uint32_t auth_precompute = 1;

	if (xform == NULL) {
		sess->auth.algo = IMB_AUTH_NULL;
		return 0;
	}

	if (xform->type != RTE_CRYPTO_SYM_XFORM_AUTH) {
		IPSEC_MB_LOG(ERR, "Crypto xform struct not of type auth");
		return -1;
	}

	/* Set IV parameters */
	sess->auth_iv.offset = xform->auth.iv.offset;
	sess->auth_iv.length = xform->auth.iv.length;

	/* Set the request digest size */
	sess->auth.req_digest_len = xform->auth.digest_length;

	/* Select auth generate/verify */
	sess->auth.operation = xform->auth.op;

	/* Set Authentication Parameters */
	if (xform->auth.algo == RTE_CRYPTO_AUTH_NULL) {
		sess->auth.algo = IMB_AUTH_NULL;
		sess->auth.gen_digest_len = 0;
		return 0;
	}

	if (xform->auth.algo == RTE_CRYPTO_AUTH_AES_XCBC_MAC) {
		sess->auth.algo = IMB_AUTH_AES_XCBC;

		uint16_t xcbc_mac_digest_len =
			get_truncated_digest_byte_length(IMB_AUTH_AES_XCBC);
		if (sess->auth.req_digest_len != xcbc_mac_digest_len) {
			IPSEC_MB_LOG(ERR, "Invalid digest size\n");
			return -EINVAL;
		}
		sess->auth.gen_digest_len = sess->auth.req_digest_len;

		IMB_AES_XCBC_KEYEXP(mb_mgr, xform->auth.key.data,
				sess->auth.xcbc.k1_expanded,
				sess->auth.xcbc.k2, sess->auth.xcbc.k3);
		return 0;
	}

	if (xform->auth.algo == RTE_CRYPTO_AUTH_AES_CMAC) {
		uint32_t dust[4*15];

		sess->auth.algo = IMB_AUTH_AES_CMAC;

		uint16_t cmac_digest_len =
				get_digest_byte_length(IMB_AUTH_AES_CMAC);

		if (sess->auth.req_digest_len > cmac_digest_len) {
			IPSEC_MB_LOG(ERR, "Invalid digest size\n");
			return -EINVAL;
		}
		/*
		 * Multi-buffer lib supports digest sizes from 4 to 16 bytes
		 * in version 0.50 and sizes of 12 and 16 bytes,
		 * in version 0.49.
		 * If size requested is different, generate the full digest
		 * (16 bytes) in a temporary location and then memcpy
		 * the requested number of bytes.
		 */
		if (sess->auth.req_digest_len < 4)
			sess->auth.gen_digest_len = cmac_digest_len;
		else
			sess->auth.gen_digest_len = sess->auth.req_digest_len;

		IMB_AES_KEYEXP_128(mb_mgr, xform->auth.key.data,
				sess->auth.cmac.expkey, dust);
		IMB_AES_CMAC_SUBKEY_GEN_128(mb_mgr, sess->auth.cmac.expkey,
				sess->auth.cmac.skey1, sess->auth.cmac.skey2);
		return 0;
	}

	if (xform->auth.algo == RTE_CRYPTO_AUTH_AES_GMAC) {
		if (xform->auth.op == RTE_CRYPTO_AUTH_OP_GENERATE) {
			sess->cipher.direction = IMB_DIR_ENCRYPT;
			sess->chain_order = IMB_ORDER_CIPHER_HASH;
		} else
			sess->cipher.direction = IMB_DIR_DECRYPT;

		sess->auth.algo = IMB_AUTH_AES_GMAC;
		if (sess->auth.req_digest_len >
			get_digest_byte_length(IMB_AUTH_AES_GMAC)) {
			IPSEC_MB_LOG(ERR, "Invalid digest size\n");
			return -EINVAL;
		}
		sess->auth.gen_digest_len = sess->auth.req_digest_len;
		sess->iv.length = xform->auth.iv.length;
		sess->iv.offset = xform->auth.iv.offset;

		switch (xform->auth.key.length) {
		case IMB_KEY_128_BYTES:
			IMB_AES128_GCM_PRE(mb_mgr, xform->auth.key.data,
				&sess->cipher.gcm_key);
			sess->cipher.key_length_in_bytes = IMB_KEY_128_BYTES;
			break;
		case IMB_KEY_192_BYTES:
			IMB_AES192_GCM_PRE(mb_mgr, xform->auth.key.data,
				&sess->cipher.gcm_key);
			sess->cipher.key_length_in_bytes = IMB_KEY_192_BYTES;
			break;
		case IMB_KEY_256_BYTES:
			IMB_AES256_GCM_PRE(mb_mgr, xform->auth.key.data,
				&sess->cipher.gcm_key);
			sess->cipher.key_length_in_bytes = IMB_KEY_256_BYTES;
			break;
		default:
			IPSEC_MB_LOG(ERR, "Invalid authentication key length\n");
			return -EINVAL;
		}

		return 0;
	}

	if (xform->auth.algo == RTE_CRYPTO_AUTH_ZUC_EIA3) {
		if (xform->auth.key.length == 16) {
			sess->auth.algo = IMB_AUTH_ZUC_EIA3_BITLEN;

			if (sess->auth.req_digest_len != 4) {
				IPSEC_MB_LOG(ERR, "Invalid digest size\n");
				return -EINVAL;
			}
		} else if (xform->auth.key.length == 32) {
			sess->auth.algo = IMB_AUTH_ZUC256_EIA3_BITLEN;
#if IMB_VERSION(1, 2, 0) < IMB_VERSION_NUM
			if (sess->auth.req_digest_len != 4 &&
					sess->auth.req_digest_len != 8 &&
					sess->auth.req_digest_len != 16) {
#else
			if (sess->auth.req_digest_len != 4) {
#endif
				IPSEC_MB_LOG(ERR, "Invalid digest size\n");
				return -EINVAL;
			}
		} else {
			IPSEC_MB_LOG(ERR, "Invalid authentication key length\n");
			return -EINVAL;
		}

		sess->auth.gen_digest_len = sess->auth.req_digest_len;

		memcpy(sess->auth.zuc_auth_key, xform->auth.key.data,
			xform->auth.key.length);
		return 0;
	} else if (xform->auth.algo == RTE_CRYPTO_AUTH_SNOW3G_UIA2) {
		sess->auth.algo = IMB_AUTH_SNOW3G_UIA2_BITLEN;
		uint16_t snow3g_uia2_digest_len =
			get_truncated_digest_byte_length(
						IMB_AUTH_SNOW3G_UIA2_BITLEN);
		if (sess->auth.req_digest_len != snow3g_uia2_digest_len) {
			IPSEC_MB_LOG(ERR, "Invalid digest size\n");
			return -EINVAL;
		}
		sess->auth.gen_digest_len = sess->auth.req_digest_len;

		IMB_SNOW3G_INIT_KEY_SCHED(mb_mgr, xform->auth.key.data,
					&sess->auth.pKeySched_snow3g_auth);
		return 0;
	} else if (xform->auth.algo == RTE_CRYPTO_AUTH_KASUMI_F9) {
		sess->auth.algo = IMB_AUTH_KASUMI_UIA1;
		uint16_t kasumi_f9_digest_len =
			get_truncated_digest_byte_length(IMB_AUTH_KASUMI_UIA1);
		if (sess->auth.req_digest_len != kasumi_f9_digest_len) {
			IPSEC_MB_LOG(ERR, "Invalid digest size\n");
			return -EINVAL;
		}
		sess->auth.gen_digest_len = sess->auth.req_digest_len;

		IMB_KASUMI_INIT_F9_KEY_SCHED(mb_mgr, xform->auth.key.data,
					&sess->auth.pKeySched_kasumi_auth);
		return 0;
	}

	switch (xform->auth.algo) {
	case RTE_CRYPTO_AUTH_MD5_HMAC:
		sess->auth.algo = IMB_AUTH_MD5;
		hash_oneblock_fn = mb_mgr->md5_one_block;
		break;
	case RTE_CRYPTO_AUTH_SHA1_HMAC:
		sess->auth.algo = IMB_AUTH_HMAC_SHA_1;
		hash_oneblock_fn = mb_mgr->sha1_one_block;
		if (xform->auth.key.length > get_auth_algo_blocksize(
				IMB_AUTH_HMAC_SHA_1)) {
			IMB_SHA1(mb_mgr,
				xform->auth.key.data,
				xform->auth.key.length,
				hashed_key);
			key_larger_block_size = 1;
		}
		break;
	case RTE_CRYPTO_AUTH_SHA1:
		sess->auth.algo = IMB_AUTH_SHA_1;
		auth_precompute = 0;
		break;
	case RTE_CRYPTO_AUTH_SHA224_HMAC:
		sess->auth.algo = IMB_AUTH_HMAC_SHA_224;
		hash_oneblock_fn = mb_mgr->sha224_one_block;
		if (xform->auth.key.length > get_auth_algo_blocksize(
				IMB_AUTH_HMAC_SHA_224)) {
			IMB_SHA224(mb_mgr,
				xform->auth.key.data,
				xform->auth.key.length,
				hashed_key);
			key_larger_block_size = 1;
		}
		break;
	case RTE_CRYPTO_AUTH_SHA224:
		sess->auth.algo = IMB_AUTH_SHA_224;
		auth_precompute = 0;
		break;
	case RTE_CRYPTO_AUTH_SHA256_HMAC:
		sess->auth.algo = IMB_AUTH_HMAC_SHA_256;
		hash_oneblock_fn = mb_mgr->sha256_one_block;
		if (xform->auth.key.length > get_auth_algo_blocksize(
				IMB_AUTH_HMAC_SHA_256)) {
			IMB_SHA256(mb_mgr,
				xform->auth.key.data,
				xform->auth.key.length,
				hashed_key);
			key_larger_block_size = 1;
		}
		break;
	case RTE_CRYPTO_AUTH_SHA256:
		sess->auth.algo = IMB_AUTH_SHA_256;
		auth_precompute = 0;
		break;
	case RTE_CRYPTO_AUTH_SHA384_HMAC:
		sess->auth.algo = IMB_AUTH_HMAC_SHA_384;
		hash_oneblock_fn = mb_mgr->sha384_one_block;
		if (xform->auth.key.length > get_auth_algo_blocksize(
				IMB_AUTH_HMAC_SHA_384)) {
			IMB_SHA384(mb_mgr,
				xform->auth.key.data,
				xform->auth.key.length,
				hashed_key);
			key_larger_block_size = 1;
		}
		break;
	case RTE_CRYPTO_AUTH_SHA384:
		sess->auth.algo = IMB_AUTH_SHA_384;
		auth_precompute = 0;
		break;
	case RTE_CRYPTO_AUTH_SHA512_HMAC:
		sess->auth.algo = IMB_AUTH_HMAC_SHA_512;
		hash_oneblock_fn = mb_mgr->sha512_one_block;
		if (xform->auth.key.length > get_auth_algo_blocksize(
				IMB_AUTH_HMAC_SHA_512)) {
			IMB_SHA512(mb_mgr,
				xform->auth.key.data,
				xform->auth.key.length,
				hashed_key);
			key_larger_block_size = 1;
		}
		break;
	case RTE_CRYPTO_AUTH_SHA512:
		sess->auth.algo = IMB_AUTH_SHA_512;
		auth_precompute = 0;
		break;
	default:
		IPSEC_MB_LOG(ERR,
			"Unsupported authentication algorithm selection");
		return -ENOTSUP;
	}
	uint16_t trunc_digest_size =
			get_truncated_digest_byte_length(sess->auth.algo);
	uint16_t full_digest_size =
			get_digest_byte_length(sess->auth.algo);

	if (sess->auth.req_digest_len > full_digest_size ||
			sess->auth.req_digest_len == 0) {
		IPSEC_MB_LOG(ERR, "Invalid digest size\n");
		return -EINVAL;
	}

	if (sess->auth.req_digest_len != trunc_digest_size &&
			sess->auth.req_digest_len != full_digest_size)
		sess->auth.gen_digest_len = full_digest_size;
	else
		sess->auth.gen_digest_len = sess->auth.req_digest_len;

	/* Plain SHA does not require precompute key */
	if (auth_precompute == 0)
		return 0;

	/* Calculate Authentication precomputes */
	if (key_larger_block_size) {
		calculate_auth_precomputes(hash_oneblock_fn,
			sess->auth.pads.inner, sess->auth.pads.outer,
			hashed_key,
			xform->auth.key.length,
			get_auth_algo_blocksize(sess->auth.algo));
	} else {
		calculate_auth_precomputes(hash_oneblock_fn,
			sess->auth.pads.inner, sess->auth.pads.outer,
			xform->auth.key.data,
			xform->auth.key.length,
			get_auth_algo_blocksize(sess->auth.algo));
	}

	return 0;
}

/** Set session cipher parameters */
static int
aesni_mb_set_session_cipher_parameters(const IMB_MGR *mb_mgr,
		struct aesni_mb_session *sess,
		const struct rte_crypto_sym_xform *xform)
{
	uint8_t is_aes = 0;
	uint8_t is_3DES = 0;
	uint8_t is_docsis = 0;
	uint8_t is_zuc = 0;
	uint8_t is_snow3g = 0;
	uint8_t is_kasumi = 0;

	if (xform == NULL) {
		sess->cipher.mode = IMB_CIPHER_NULL;
		return 0;
	}

	if (xform->type != RTE_CRYPTO_SYM_XFORM_CIPHER) {
		IPSEC_MB_LOG(ERR, "Crypto xform struct not of type cipher");
		return -EINVAL;
	}

	/* Select cipher direction */
	switch (xform->cipher.op) {
	case RTE_CRYPTO_CIPHER_OP_ENCRYPT:
		sess->cipher.direction = IMB_DIR_ENCRYPT;
		break;
	case RTE_CRYPTO_CIPHER_OP_DECRYPT:
		sess->cipher.direction = IMB_DIR_DECRYPT;
		break;
	default:
		IPSEC_MB_LOG(ERR, "Invalid cipher operation parameter");
		return -EINVAL;
	}

	/* Select cipher mode */
	switch (xform->cipher.algo) {
	case RTE_CRYPTO_CIPHER_AES_CBC:
		sess->cipher.mode = IMB_CIPHER_CBC;
		is_aes = 1;
		break;
	case RTE_CRYPTO_CIPHER_AES_CTR:
		sess->cipher.mode = IMB_CIPHER_CNTR;
		is_aes = 1;
		break;
	case RTE_CRYPTO_CIPHER_AES_DOCSISBPI:
		sess->cipher.mode = IMB_CIPHER_DOCSIS_SEC_BPI;
		is_docsis = 1;
		break;
	case RTE_CRYPTO_CIPHER_DES_CBC:
		sess->cipher.mode = IMB_CIPHER_DES;
		break;
	case RTE_CRYPTO_CIPHER_DES_DOCSISBPI:
		sess->cipher.mode = IMB_CIPHER_DOCSIS_DES;
		break;
	case RTE_CRYPTO_CIPHER_3DES_CBC:
		sess->cipher.mode = IMB_CIPHER_DES3;
		is_3DES = 1;
		break;
	case RTE_CRYPTO_CIPHER_AES_ECB:
		sess->cipher.mode = IMB_CIPHER_ECB;
		is_aes = 1;
		break;
	case RTE_CRYPTO_CIPHER_ZUC_EEA3:
		sess->cipher.mode = IMB_CIPHER_ZUC_EEA3;
		is_zuc = 1;
		break;
	case RTE_CRYPTO_CIPHER_SNOW3G_UEA2:
		sess->cipher.mode = IMB_CIPHER_SNOW3G_UEA2_BITLEN;
		is_snow3g = 1;
		break;
	case RTE_CRYPTO_CIPHER_KASUMI_F8:
		sess->cipher.mode = IMB_CIPHER_KASUMI_UEA1_BITLEN;
		is_kasumi = 1;
		break;
	case RTE_CRYPTO_CIPHER_NULL:
		sess->cipher.mode = IMB_CIPHER_NULL;
		sess->cipher.key_length_in_bytes = 0;
		sess->iv.offset = xform->cipher.iv.offset;
		sess->iv.length = xform->cipher.iv.length;
		return 0;
	default:
		IPSEC_MB_LOG(ERR, "Unsupported cipher mode parameter");
		return -ENOTSUP;
	}

	/* Set IV parameters */
	sess->iv.offset = xform->cipher.iv.offset;
	sess->iv.length = xform->cipher.iv.length;

	/* Check key length and choose key expansion function for AES */
	if (is_aes) {
		switch (xform->cipher.key.length) {
		case IMB_KEY_128_BYTES:
			sess->cipher.key_length_in_bytes = IMB_KEY_128_BYTES;
			IMB_AES_KEYEXP_128(mb_mgr, xform->cipher.key.data,
					sess->cipher.expanded_aes_keys.encode,
					sess->cipher.expanded_aes_keys.decode);
			break;
		case IMB_KEY_192_BYTES:
			sess->cipher.key_length_in_bytes = IMB_KEY_192_BYTES;
			IMB_AES_KEYEXP_192(mb_mgr, xform->cipher.key.data,
					sess->cipher.expanded_aes_keys.encode,
					sess->cipher.expanded_aes_keys.decode);
			break;
		case IMB_KEY_256_BYTES:
			sess->cipher.key_length_in_bytes = IMB_KEY_256_BYTES;
			IMB_AES_KEYEXP_256(mb_mgr, xform->cipher.key.data,
					sess->cipher.expanded_aes_keys.encode,
					sess->cipher.expanded_aes_keys.decode);
			break;
		default:
			IPSEC_MB_LOG(ERR, "Invalid cipher key length");
			return -EINVAL;
		}
	} else if (is_docsis) {
		switch (xform->cipher.key.length) {
		case IMB_KEY_128_BYTES:
			sess->cipher.key_length_in_bytes = IMB_KEY_128_BYTES;
			IMB_AES_KEYEXP_128(mb_mgr, xform->cipher.key.data,
					sess->cipher.expanded_aes_keys.encode,
					sess->cipher.expanded_aes_keys.decode);
			break;
		case IMB_KEY_256_BYTES:
			sess->cipher.key_length_in_bytes = IMB_KEY_256_BYTES;
			IMB_AES_KEYEXP_256(mb_mgr, xform->cipher.key.data,
					sess->cipher.expanded_aes_keys.encode,
					sess->cipher.expanded_aes_keys.decode);
			break;
		default:
			IPSEC_MB_LOG(ERR, "Invalid cipher key length");
			return -EINVAL;
		}
	} else if (is_3DES) {
		uint64_t *keys[3] = {sess->cipher.exp_3des_keys.key[0],
				sess->cipher.exp_3des_keys.key[1],
				sess->cipher.exp_3des_keys.key[2]};

		switch (xform->cipher.key.length) {
		case  24:
			IMB_DES_KEYSCHED(mb_mgr, keys[0],
					xform->cipher.key.data);
			IMB_DES_KEYSCHED(mb_mgr, keys[1],
					xform->cipher.key.data + 8);
			IMB_DES_KEYSCHED(mb_mgr, keys[2],
					xform->cipher.key.data + 16);

			/* Initialize keys - 24 bytes: [K1-K2-K3] */
			sess->cipher.exp_3des_keys.ks_ptr[0] = keys[0];
			sess->cipher.exp_3des_keys.ks_ptr[1] = keys[1];
			sess->cipher.exp_3des_keys.ks_ptr[2] = keys[2];
			break;
		case 16:
			IMB_DES_KEYSCHED(mb_mgr, keys[0],
					xform->cipher.key.data);
			IMB_DES_KEYSCHED(mb_mgr, keys[1],
					xform->cipher.key.data + 8);
			/* Initialize keys - 16 bytes: [K1=K1,K2=K2,K3=K1] */
			sess->cipher.exp_3des_keys.ks_ptr[0] = keys[0];
			sess->cipher.exp_3des_keys.ks_ptr[1] = keys[1];
			sess->cipher.exp_3des_keys.ks_ptr[2] = keys[0];
			break;
		case 8:
			IMB_DES_KEYSCHED(mb_mgr, keys[0],
					xform->cipher.key.data);

			/* Initialize keys - 8 bytes: [K1 = K2 = K3] */
			sess->cipher.exp_3des_keys.ks_ptr[0] = keys[0];
			sess->cipher.exp_3des_keys.ks_ptr[1] = keys[0];
			sess->cipher.exp_3des_keys.ks_ptr[2] = keys[0];
			break;
		default:
			IPSEC_MB_LOG(ERR, "Invalid cipher key length");
			return -EINVAL;
		}

		sess->cipher.key_length_in_bytes = 24;
	} else if (is_zuc) {
		if (xform->cipher.key.length != 16 &&
				xform->cipher.key.length != 32) {
			IPSEC_MB_LOG(ERR, "Invalid cipher key length");
			return -EINVAL;
		}
		sess->cipher.key_length_in_bytes = xform->cipher.key.length;
		memcpy(sess->cipher.zuc_cipher_key, xform->cipher.key.data,
			xform->cipher.key.length);
	} else if (is_snow3g) {
		if (xform->cipher.key.length != 16) {
			IPSEC_MB_LOG(ERR, "Invalid cipher key length");
			return -EINVAL;
		}
		sess->cipher.key_length_in_bytes = 16;
		IMB_SNOW3G_INIT_KEY_SCHED(mb_mgr, xform->cipher.key.data,
					&sess->cipher.pKeySched_snow3g_cipher);
	} else if (is_kasumi) {
		if (xform->cipher.key.length != 16) {
			IPSEC_MB_LOG(ERR, "Invalid cipher key length");
			return -EINVAL;
		}
		sess->cipher.key_length_in_bytes = 16;
		IMB_KASUMI_INIT_F8_KEY_SCHED(mb_mgr, xform->cipher.key.data,
					&sess->cipher.pKeySched_kasumi_cipher);
	} else {
		if (xform->cipher.key.length != 8) {
			IPSEC_MB_LOG(ERR, "Invalid cipher key length");
			return -EINVAL;
		}
		sess->cipher.key_length_in_bytes = 8;

		IMB_DES_KEYSCHED(mb_mgr,
			(uint64_t *)sess->cipher.expanded_aes_keys.encode,
				xform->cipher.key.data);
		IMB_DES_KEYSCHED(mb_mgr,
			(uint64_t *)sess->cipher.expanded_aes_keys.decode,
				xform->cipher.key.data);
	}

	return 0;
}

static int
aesni_mb_set_session_aead_parameters(const IMB_MGR *mb_mgr,
		struct aesni_mb_session *sess,
		const struct rte_crypto_sym_xform *xform)
{
	switch (xform->aead.op) {
	case RTE_CRYPTO_AEAD_OP_ENCRYPT:
		sess->cipher.direction = IMB_DIR_ENCRYPT;
		sess->auth.operation = RTE_CRYPTO_AUTH_OP_GENERATE;
		break;
	case RTE_CRYPTO_AEAD_OP_DECRYPT:
		sess->cipher.direction = IMB_DIR_DECRYPT;
		sess->auth.operation = RTE_CRYPTO_AUTH_OP_VERIFY;
		break;
	default:
		IPSEC_MB_LOG(ERR, "Invalid aead operation parameter");
		return -EINVAL;
	}

	/* Set IV parameters */
	sess->iv.offset = xform->aead.iv.offset;
	sess->iv.length = xform->aead.iv.length;

	/* Set digest sizes */
	sess->auth.req_digest_len = xform->aead.digest_length;
	sess->auth.gen_digest_len = sess->auth.req_digest_len;

	switch (xform->aead.algo) {
	case RTE_CRYPTO_AEAD_AES_CCM:
		sess->cipher.mode = IMB_CIPHER_CCM;
		sess->auth.algo = IMB_AUTH_AES_CCM;

		/* Check key length and choose key expansion function for AES */
		switch (xform->aead.key.length) {
		case IMB_KEY_128_BYTES:
			sess->cipher.key_length_in_bytes = IMB_KEY_128_BYTES;
			IMB_AES_KEYEXP_128(mb_mgr, xform->aead.key.data,
					sess->cipher.expanded_aes_keys.encode,
					sess->cipher.expanded_aes_keys.decode);
			break;
		case IMB_KEY_256_BYTES:
			sess->cipher.key_length_in_bytes = IMB_KEY_256_BYTES;
			IMB_AES_KEYEXP_256(mb_mgr, xform->aead.key.data,
					sess->cipher.expanded_aes_keys.encode,
					sess->cipher.expanded_aes_keys.decode);
			break;
		default:
			IPSEC_MB_LOG(ERR, "Invalid cipher key length");
			return -EINVAL;
		}

		/* CCM digests must be between 4 and 16 and an even number */
		if (sess->auth.req_digest_len < AES_CCM_DIGEST_MIN_LEN ||
			sess->auth.req_digest_len > AES_CCM_DIGEST_MAX_LEN ||
			(sess->auth.req_digest_len & 1) == 1) {
			IPSEC_MB_LOG(ERR, "Invalid digest size\n");
			return -EINVAL;
		}
		break;

	case RTE_CRYPTO_AEAD_AES_GCM:
		sess->cipher.mode = IMB_CIPHER_GCM;
		sess->auth.algo = IMB_AUTH_AES_GMAC;

		switch (xform->aead.key.length) {
		case IMB_KEY_128_BYTES:
			sess->cipher.key_length_in_bytes = IMB_KEY_128_BYTES;
			IMB_AES128_GCM_PRE(mb_mgr, xform->aead.key.data,
				&sess->cipher.gcm_key);
			break;
		case IMB_KEY_192_BYTES:
			sess->cipher.key_length_in_bytes = IMB_KEY_192_BYTES;
			IMB_AES192_GCM_PRE(mb_mgr, xform->aead.key.data,
				&sess->cipher.gcm_key);
			break;
		case IMB_KEY_256_BYTES:
			sess->cipher.key_length_in_bytes = IMB_KEY_256_BYTES;
			IMB_AES256_GCM_PRE(mb_mgr, xform->aead.key.data,
				&sess->cipher.gcm_key);
			break;
		default:
			IPSEC_MB_LOG(ERR, "Invalid cipher key length");
			return -EINVAL;
		}

		/* GCM digest size must be between 1 and 16 */
		if (sess->auth.req_digest_len == 0 ||
				sess->auth.req_digest_len > 16) {
			IPSEC_MB_LOG(ERR, "Invalid digest size\n");
			return -EINVAL;
		}
		break;

	case RTE_CRYPTO_AEAD_CHACHA20_POLY1305:
		sess->cipher.mode = IMB_CIPHER_CHACHA20_POLY1305;
		sess->auth.algo = IMB_AUTH_CHACHA20_POLY1305;

		if (xform->aead.key.length != 32) {
			IPSEC_MB_LOG(ERR, "Invalid key length");
			return -EINVAL;
		}
		sess->cipher.key_length_in_bytes = 32;
		memcpy(sess->cipher.expanded_aes_keys.encode,
			xform->aead.key.data, 32);
		if (sess->auth.req_digest_len != 16) {
			IPSEC_MB_LOG(ERR, "Invalid digest size\n");
			return -EINVAL;
		}
		break;
	default:
		IPSEC_MB_LOG(ERR, "Unsupported aead mode parameter");
		return -ENOTSUP;
	}

	return 0;
}

/** Configure a aesni multi-buffer session from a crypto xform chain */
static int
aesni_mb_session_configure(IMB_MGR *mb_mgr,
		void *priv_sess,
		const struct rte_crypto_sym_xform *xform)
{
	const struct rte_crypto_sym_xform *auth_xform = NULL;
	const struct rte_crypto_sym_xform *cipher_xform = NULL;
	const struct rte_crypto_sym_xform *aead_xform = NULL;
	enum ipsec_mb_operation mode;
	struct aesni_mb_session *sess = (struct aesni_mb_session *) priv_sess;
	int ret;

	ret = ipsec_mb_parse_xform(xform, &mode, &auth_xform,
				&cipher_xform, &aead_xform);
	if (ret)
		return ret;

	/* Select Crypto operation - hash then cipher / cipher then hash */
	switch (mode) {
	case IPSEC_MB_OP_HASH_VERIFY_THEN_DECRYPT:
		sess->chain_order = IMB_ORDER_HASH_CIPHER;
		break;
	case IPSEC_MB_OP_ENCRYPT_THEN_HASH_GEN:
	case IPSEC_MB_OP_DECRYPT_THEN_HASH_VERIFY:
		sess->chain_order = IMB_ORDER_CIPHER_HASH;
		break;
	case IPSEC_MB_OP_HASH_GEN_ONLY:
	case IPSEC_MB_OP_HASH_VERIFY_ONLY:
	case IPSEC_MB_OP_HASH_GEN_THEN_ENCRYPT:
		sess->chain_order = IMB_ORDER_HASH_CIPHER;
		break;
	/*
	 * Multi buffer library operates only at two modes,
	 * IMB_ORDER_CIPHER_HASH and IMB_ORDER_HASH_CIPHER.
	 * When doing ciphering only, chain order depends
	 * on cipher operation: encryption is always
	 * the first operation and decryption the last one.
	 */
	case IPSEC_MB_OP_ENCRYPT_ONLY:
		sess->chain_order = IMB_ORDER_CIPHER_HASH;
		break;
	case IPSEC_MB_OP_DECRYPT_ONLY:
		sess->chain_order = IMB_ORDER_HASH_CIPHER;
		break;
	case IPSEC_MB_OP_AEAD_AUTHENTICATED_ENCRYPT:
		sess->chain_order = IMB_ORDER_CIPHER_HASH;
		sess->aead.aad_len = xform->aead.aad_length;
		break;
	case IPSEC_MB_OP_AEAD_AUTHENTICATED_DECRYPT:
		sess->chain_order = IMB_ORDER_HASH_CIPHER;
		sess->aead.aad_len = xform->aead.aad_length;
		break;
	case IPSEC_MB_OP_NOT_SUPPORTED:
	default:
		IPSEC_MB_LOG(ERR,
			"Unsupported operation chain order parameter");
		return -ENOTSUP;
	}

	/* Default IV length = 0 */
	sess->iv.length = 0;
	sess->auth_iv.length = 0;

	ret = aesni_mb_set_session_auth_parameters(mb_mgr, sess, auth_xform);
	if (ret != 0) {
		IPSEC_MB_LOG(ERR,
			"Invalid/unsupported authentication parameters");
		return ret;
	}

	ret = aesni_mb_set_session_cipher_parameters(mb_mgr, sess,
			cipher_xform);
	if (ret != 0) {
		IPSEC_MB_LOG(ERR, "Invalid/unsupported cipher parameters");
		return ret;
	}

	if (aead_xform) {
		ret = aesni_mb_set_session_aead_parameters(mb_mgr, sess,
				aead_xform);
		if (ret != 0) {
			IPSEC_MB_LOG(ERR,
				"Invalid/unsupported aead parameters");
			return ret;
		}
	}

	return 0;
}

#ifdef AESNI_MB_DOCSIS_SEC_ENABLED
/** Check DOCSIS security session configuration is valid */
static int
check_docsis_sec_session(struct rte_security_session_conf *conf)
{
	struct rte_crypto_sym_xform *crypto_sym = conf->crypto_xform;
	struct rte_security_docsis_xform *docsis = &conf->docsis;

	/* Downlink: CRC generate -> Cipher encrypt */
	if (docsis->direction == RTE_SECURITY_DOCSIS_DOWNLINK) {

		if (crypto_sym != NULL &&
		    crypto_sym->type ==	RTE_CRYPTO_SYM_XFORM_CIPHER &&
		    crypto_sym->cipher.op == RTE_CRYPTO_CIPHER_OP_ENCRYPT &&
		    crypto_sym->cipher.algo ==
					RTE_CRYPTO_CIPHER_AES_DOCSISBPI &&
		    (crypto_sym->cipher.key.length == IMB_KEY_128_BYTES ||
		     crypto_sym->cipher.key.length == IMB_KEY_256_BYTES) &&
		    crypto_sym->cipher.iv.length == IMB_AES_BLOCK_SIZE &&
		    crypto_sym->next == NULL) {
			return 0;
		}
	/* Uplink: Cipher decrypt -> CRC verify */
	} else if (docsis->direction == RTE_SECURITY_DOCSIS_UPLINK) {

		if (crypto_sym != NULL &&
		    crypto_sym->type == RTE_CRYPTO_SYM_XFORM_CIPHER &&
		    crypto_sym->cipher.op == RTE_CRYPTO_CIPHER_OP_DECRYPT &&
		    crypto_sym->cipher.algo ==
					RTE_CRYPTO_CIPHER_AES_DOCSISBPI &&
		    (crypto_sym->cipher.key.length == IMB_KEY_128_BYTES ||
		     crypto_sym->cipher.key.length == IMB_KEY_256_BYTES) &&
		    crypto_sym->cipher.iv.length == IMB_AES_BLOCK_SIZE &&
		    crypto_sym->next == NULL) {
			return 0;
		}
	}

	return -EINVAL;
}

/** Set DOCSIS security session auth (CRC) parameters */
static int
aesni_mb_set_docsis_sec_session_auth_parameters(struct aesni_mb_session *sess,
		struct rte_security_docsis_xform *xform)
{
	if (xform == NULL) {
		IPSEC_MB_LOG(ERR, "Invalid DOCSIS xform");
		return -EINVAL;
	}

	/* Select CRC generate/verify */
	if (xform->direction == RTE_SECURITY_DOCSIS_UPLINK) {
		sess->auth.algo = IMB_AUTH_DOCSIS_CRC32;
		sess->auth.operation = RTE_CRYPTO_AUTH_OP_VERIFY;
	} else if (xform->direction == RTE_SECURITY_DOCSIS_DOWNLINK) {
		sess->auth.algo = IMB_AUTH_DOCSIS_CRC32;
		sess->auth.operation = RTE_CRYPTO_AUTH_OP_GENERATE;
	} else {
		IPSEC_MB_LOG(ERR, "Unsupported DOCSIS direction");
		return -ENOTSUP;
	}

	sess->auth.req_digest_len = RTE_ETHER_CRC_LEN;
	sess->auth.gen_digest_len = RTE_ETHER_CRC_LEN;

	return 0;
}

/**
 * Parse DOCSIS security session configuration and set private session
 * parameters
 */
static int
aesni_mb_set_docsis_sec_session_parameters(
		__rte_unused struct rte_cryptodev *dev,
		struct rte_security_session_conf *conf,
		void *sess)
{
	IMB_MGR  *mb_mgr = alloc_init_mb_mgr();
	struct rte_security_docsis_xform *docsis_xform;
	struct rte_crypto_sym_xform *cipher_xform;
	struct aesni_mb_session *ipsec_sess = sess;
	int ret = 0;

	if (!mb_mgr)
		return -ENOMEM;

	ret = check_docsis_sec_session(conf);
	if (ret) {
		IPSEC_MB_LOG(ERR, "Unsupported DOCSIS security configuration");
		goto error_exit;
	}

	switch (conf->docsis.direction) {
	case RTE_SECURITY_DOCSIS_UPLINK:
		ipsec_sess->chain_order = IMB_ORDER_CIPHER_HASH;
		docsis_xform = &conf->docsis;
		cipher_xform = conf->crypto_xform;
		break;
	case RTE_SECURITY_DOCSIS_DOWNLINK:
		ipsec_sess->chain_order = IMB_ORDER_HASH_CIPHER;
		cipher_xform = conf->crypto_xform;
		docsis_xform = &conf->docsis;
		break;
	default:
		IPSEC_MB_LOG(ERR, "Unsupported DOCSIS security configuration");
		ret = -EINVAL;
		goto error_exit;
	}

	/* Default IV length = 0 */
	ipsec_sess->iv.length = 0;

	ret = aesni_mb_set_docsis_sec_session_auth_parameters(ipsec_sess,
			docsis_xform);
	if (ret != 0) {
		IPSEC_MB_LOG(ERR, "Invalid/unsupported DOCSIS parameters");
		goto error_exit;
	}

	ret = aesni_mb_set_session_cipher_parameters(mb_mgr,
			ipsec_sess, cipher_xform);

	if (ret != 0) {
		IPSEC_MB_LOG(ERR, "Invalid/unsupported cipher parameters");
		goto error_exit;
	}

error_exit:
	free_mb_mgr(mb_mgr);
	return ret;
}
#endif

static inline uint64_t
auth_start_offset(struct rte_crypto_op *op, struct aesni_mb_session *session,
		uint32_t oop, const uint32_t auth_offset,
		const uint32_t cipher_offset, const uint32_t auth_length,
		const uint32_t cipher_length, uint8_t lb_sgl)
{
	struct rte_mbuf *m_src, *m_dst;
	uint8_t *p_src, *p_dst;
	uintptr_t u_src, u_dst;
	uint32_t cipher_end, auth_end;

	/* Only cipher then hash needs special calculation. */
	if (!oop || session->chain_order != IMB_ORDER_CIPHER_HASH || lb_sgl)
		return auth_offset;

	m_src = op->sym->m_src;
	m_dst = op->sym->m_dst;

	p_src = rte_pktmbuf_mtod(m_src, uint8_t *);
	p_dst = rte_pktmbuf_mtod(m_dst, uint8_t *);
	u_src = (uintptr_t)p_src;
	u_dst = (uintptr_t)p_dst + auth_offset;

	/**
	 * Copy the content between cipher offset and auth offset for generating
	 * correct digest.
	 */
	if (cipher_offset > auth_offset)
		memcpy(p_dst + auth_offset,
				p_src + auth_offset,
				cipher_offset -
				auth_offset);

	/**
	 * Copy the content between (cipher offset + length) and (auth offset +
	 * length) for generating correct digest
	 */
	cipher_end = cipher_offset + cipher_length;
	auth_end = auth_offset + auth_length;
	if (cipher_end < auth_end)
		memcpy(p_dst + cipher_end, p_src + cipher_end,
				auth_end - cipher_end);

	/**
	 * Since intel-ipsec-mb only supports positive values,
	 * we need to deduct the correct offset between src and dst.
	 */

	return u_src < u_dst ? (u_dst - u_src) :
			(UINT64_MAX - u_src + u_dst + 1);
}

static inline void
set_cpu_mb_job_params(IMB_JOB *job, struct aesni_mb_session *session,
		union rte_crypto_sym_ofs sofs, void *buf, uint32_t len,
		struct rte_crypto_va_iova_ptr *iv,
		struct rte_crypto_va_iova_ptr *aad, void *digest, void *udata)
{
	/* Set crypto operation */
	job->chain_order = session->chain_order;

	/* Set cipher parameters */
	job->cipher_direction = session->cipher.direction;
	job->cipher_mode = session->cipher.mode;

	job->key_len_in_bytes = session->cipher.key_length_in_bytes;

	/* Set authentication parameters */
	job->hash_alg = session->auth.algo;
	job->iv = iv->va;

	switch (job->hash_alg) {
	case IMB_AUTH_AES_XCBC:
		job->u.XCBC._k1_expanded = session->auth.xcbc.k1_expanded;
		job->u.XCBC._k2 = session->auth.xcbc.k2;
		job->u.XCBC._k3 = session->auth.xcbc.k3;
		break;

	case IMB_AUTH_AES_CCM:
		job->u.CCM.aad = (uint8_t *)aad->va + 18;
		job->u.CCM.aad_len_in_bytes = session->aead.aad_len;
		job->enc_keys = session->cipher.expanded_aes_keys.encode;
		job->dec_keys = session->cipher.expanded_aes_keys.decode;
		job->iv++;
		break;

	case IMB_AUTH_AES_CMAC:
		job->u.CMAC._key_expanded = session->auth.cmac.expkey;
		job->u.CMAC._skey1 = session->auth.cmac.skey1;
		job->u.CMAC._skey2 = session->auth.cmac.skey2;
		break;

	case IMB_AUTH_AES_GMAC:
		if (session->cipher.mode == IMB_CIPHER_GCM) {
			job->u.GCM.aad = aad->va;
			job->u.GCM.aad_len_in_bytes = session->aead.aad_len;
		} else {
			/* For GMAC */
			job->u.GCM.aad = buf;
			job->u.GCM.aad_len_in_bytes = len;
			job->cipher_mode = IMB_CIPHER_GCM;
		}
		job->enc_keys = &session->cipher.gcm_key;
		job->dec_keys = &session->cipher.gcm_key;
		break;

	case IMB_AUTH_CHACHA20_POLY1305:
		job->u.CHACHA20_POLY1305.aad = aad->va;
		job->u.CHACHA20_POLY1305.aad_len_in_bytes =
			session->aead.aad_len;
		job->enc_keys = session->cipher.expanded_aes_keys.encode;
		job->dec_keys = session->cipher.expanded_aes_keys.encode;
		break;
	default:
		job->u.HMAC._hashed_auth_key_xor_ipad =
				session->auth.pads.inner;
		job->u.HMAC._hashed_auth_key_xor_opad =
				session->auth.pads.outer;

		if (job->cipher_mode == IMB_CIPHER_DES3) {
			job->enc_keys = session->cipher.exp_3des_keys.ks_ptr;
			job->dec_keys = session->cipher.exp_3des_keys.ks_ptr;
		} else {
			job->enc_keys = session->cipher.expanded_aes_keys.encode;
			job->dec_keys = session->cipher.expanded_aes_keys.decode;
		}
	}

	/*
	 * Multi-buffer library current only support returning a truncated
	 * digest length as specified in the relevant IPsec RFCs
	 */

	/* Set digest location and length */
	job->auth_tag_output = digest;
	job->auth_tag_output_len_in_bytes = session->auth.gen_digest_len;

	/* Set IV parameters */
	job->iv_len_in_bytes = session->iv.length;

	/* Data Parameters */
	job->src = buf;
	job->dst = (uint8_t *)buf + sofs.ofs.cipher.head;
	job->cipher_start_src_offset_in_bytes = sofs.ofs.cipher.head;
	job->hash_start_src_offset_in_bytes = sofs.ofs.auth.head;
	if (job->hash_alg == IMB_AUTH_AES_GMAC &&
			session->cipher.mode != IMB_CIPHER_GCM) {
		job->msg_len_to_hash_in_bytes = 0;
		job->msg_len_to_cipher_in_bytes = 0;
	} else {
		job->msg_len_to_hash_in_bytes = len - sofs.ofs.auth.head -
			sofs.ofs.auth.tail;
		job->msg_len_to_cipher_in_bytes = len - sofs.ofs.cipher.head -
			sofs.ofs.cipher.tail;
	}

	job->user_data = udata;
}

static int
handle_aead_sgl_job(IMB_JOB *job, IMB_MGR *mb_mgr,
		uint32_t *total_len,
		struct aesni_mb_op_buf_data *src_data,
		struct aesni_mb_op_buf_data *dst_data)
{
	uint32_t data_len, part_len;

	if (*total_len == 0) {
		job->sgl_state = IMB_SGL_COMPLETE;
		return 0;
	}

	if (src_data->m == NULL) {
		IPSEC_MB_LOG(ERR, "Invalid source buffer");
		return -EINVAL;
	}

	job->sgl_state = IMB_SGL_UPDATE;

	data_len = src_data->m->data_len - src_data->offset;

	job->src = rte_pktmbuf_mtod_offset(src_data->m, uint8_t *,
			src_data->offset);

	if (dst_data->m != NULL) {
		if (dst_data->m->data_len - dst_data->offset == 0) {
			dst_data->m = dst_data->m->next;
			if (dst_data->m == NULL) {
				IPSEC_MB_LOG(ERR, "Invalid destination buffer");
				return -EINVAL;
			}
			dst_data->offset = 0;
		}
		part_len = RTE_MIN(data_len, (dst_data->m->data_len -
				dst_data->offset));
		job->dst = rte_pktmbuf_mtod_offset(dst_data->m,
				uint8_t *, dst_data->offset);
		dst_data->offset += part_len;
	} else {
		part_len = RTE_MIN(data_len, *total_len);
		job->dst = rte_pktmbuf_mtod_offset(src_data->m, uint8_t *,
			src_data->offset);
	}

	job->msg_len_to_cipher_in_bytes = part_len;
	job->msg_len_to_hash_in_bytes = part_len;

	job = IMB_SUBMIT_JOB(mb_mgr);

	*total_len -= part_len;

	if (part_len != data_len) {
		src_data->offset += part_len;
	} else {
		src_data->m = src_data->m->next;
		src_data->offset = 0;
	}

	return 0;
}

static uint64_t
sgl_linear_cipher_auth_len(IMB_JOB *job, uint64_t *auth_len)
{
	uint64_t cipher_len;

	if (job->cipher_mode == IMB_CIPHER_SNOW3G_UEA2_BITLEN ||
			job->cipher_mode == IMB_CIPHER_KASUMI_UEA1_BITLEN)
		cipher_len = (job->msg_len_to_cipher_in_bits >> 3) +
				(job->cipher_start_src_offset_in_bits >> 3);
	else
		cipher_len = job->msg_len_to_cipher_in_bytes +
				job->cipher_start_src_offset_in_bytes;

	if (job->hash_alg == IMB_AUTH_SNOW3G_UIA2_BITLEN ||
			job->hash_alg == IMB_AUTH_ZUC_EIA3_BITLEN)
		*auth_len = (job->msg_len_to_hash_in_bits >> 3) +
				job->hash_start_src_offset_in_bytes;
	else if (job->hash_alg == IMB_AUTH_AES_GMAC)
		*auth_len = job->u.GCM.aad_len_in_bytes;
	else
		*auth_len = job->msg_len_to_hash_in_bytes +
				job->hash_start_src_offset_in_bytes;

	return RTE_MAX(*auth_len, cipher_len);
}

static int
handle_sgl_linear(IMB_JOB *job, struct rte_crypto_op *op, uint32_t dst_offset,
		struct aesni_mb_session *session)
{
	uint64_t auth_len, total_len;
	uint8_t *src, *linear_buf = NULL;
	int lb_offset = 0;
	struct rte_mbuf *src_seg;
	uint16_t src_len;

	total_len = sgl_linear_cipher_auth_len(job, &auth_len);
	linear_buf = rte_zmalloc(NULL, total_len + job->auth_tag_output_len_in_bytes, 0);
	if (linear_buf == NULL) {
		IPSEC_MB_LOG(ERR, "Error allocating memory for SGL Linear Buffer\n");
		return -1;
	}

	for (src_seg = op->sym->m_src; (src_seg != NULL) &&
			(total_len - lb_offset > 0);
			src_seg = src_seg->next) {
		src = rte_pktmbuf_mtod(src_seg, uint8_t *);
		src_len =  RTE_MIN(src_seg->data_len, total_len - lb_offset);
		rte_memcpy(linear_buf + lb_offset, src, src_len);
		lb_offset += src_len;
	}

	job->src = linear_buf;
	job->dst = linear_buf + dst_offset;
	job->user_data2 = linear_buf;

	if (job->hash_alg == IMB_AUTH_AES_GMAC)
		job->u.GCM.aad = linear_buf;

	if (session->auth.operation == RTE_CRYPTO_AUTH_OP_VERIFY)
		job->auth_tag_output = linear_buf + lb_offset;
	else
		job->auth_tag_output = linear_buf + auth_len;

	return 0;
}

static inline int
imb_lib_support_sgl_algo(IMB_CIPHER_MODE alg)
{
	if (alg == IMB_CIPHER_CHACHA20_POLY1305
			|| alg == IMB_CIPHER_GCM)
		return 1;
	return 0;
}

/**
 * Process a crypto operation and complete a IMB_JOB job structure for
 * submission to the multi buffer library for processing.
 *
 * @param	qp		queue pair
 * @param	job		IMB_JOB structure to fill
 * @param	op		crypto op to process
 * @param	digest_idx	ID for digest to use
 *
 * @return
 * - 0 on success, the IMB_JOB will be filled
 * - -1 if invalid session or errors allocating SGL linear buffer,
 *   IMB_JOB will not be filled
 */
static inline int
set_mb_job_params(IMB_JOB *job, struct ipsec_mb_qp *qp,
		struct rte_crypto_op *op, uint8_t *digest_idx,
		IMB_MGR *mb_mgr)
{
	struct rte_mbuf *m_src = op->sym->m_src, *m_dst;
	struct aesni_mb_qp_data *qp_data = ipsec_mb_get_qp_private_data(qp);
	struct aesni_mb_op_buf_data src_sgl = {0};
	struct aesni_mb_op_buf_data dst_sgl = {0};
	struct aesni_mb_session *session;
	uint32_t m_offset, oop;
	uint32_t auth_off_in_bytes;
	uint32_t ciph_off_in_bytes;
	uint32_t auth_len_in_bytes;
	uint32_t ciph_len_in_bytes;
	uint32_t total_len;
	IMB_JOB base_job;
	uint8_t sgl = 0;
	uint8_t lb_sgl = 0;
	int ret;

	session = ipsec_mb_get_session_private(qp, op);
	if (session == NULL) {
		op->status = RTE_CRYPTO_OP_STATUS_INVALID_SESSION;
		return -1;
	}

	/* Set crypto operation */
	job->chain_order = session->chain_order;

	/* Set cipher parameters */
	job->cipher_direction = session->cipher.direction;
	job->cipher_mode = session->cipher.mode;

	job->key_len_in_bytes = session->cipher.key_length_in_bytes;

	/* Set authentication parameters */
	job->hash_alg = session->auth.algo;

	const int aead = is_aead_algo(job->hash_alg, job->cipher_mode);

	if (job->cipher_mode == IMB_CIPHER_DES3) {
		job->enc_keys = session->cipher.exp_3des_keys.ks_ptr;
		job->dec_keys = session->cipher.exp_3des_keys.ks_ptr;
	} else {
		job->enc_keys = session->cipher.expanded_aes_keys.encode;
		job->dec_keys = session->cipher.expanded_aes_keys.decode;
	}

	if (!op->sym->m_dst) {
		/* in-place operation */
		m_dst = m_src;
		oop = 0;
	} else if (op->sym->m_dst == op->sym->m_src) {
		/* in-place operation */
		m_dst = m_src;
		oop = 0;
	} else {
		/* out-of-place operation */
		m_dst = op->sym->m_dst;
		oop = 1;
	}

	if (m_src->nb_segs > 1 || m_dst->nb_segs > 1) {
		sgl = 1;
		if (!imb_lib_support_sgl_algo(session->cipher.mode))
			lb_sgl = 1;
	}

	switch (job->hash_alg) {
	case IMB_AUTH_AES_XCBC:
		job->u.XCBC._k1_expanded = session->auth.xcbc.k1_expanded;
		job->u.XCBC._k2 = session->auth.xcbc.k2;
		job->u.XCBC._k3 = session->auth.xcbc.k3;
		break;

	case IMB_AUTH_AES_CCM:
		job->u.CCM.aad = op->sym->aead.aad.data + 18;
		job->u.CCM.aad_len_in_bytes = session->aead.aad_len;
		break;

	case IMB_AUTH_AES_CMAC:
		job->u.CMAC._key_expanded = session->auth.cmac.expkey;
		job->u.CMAC._skey1 = session->auth.cmac.skey1;
		job->u.CMAC._skey2 = session->auth.cmac.skey2;
		break;

	case IMB_AUTH_AES_GMAC:
		if (session->cipher.mode == IMB_CIPHER_GCM) {
			job->u.GCM.aad = op->sym->aead.aad.data;
			job->u.GCM.aad_len_in_bytes = session->aead.aad_len;
			if (sgl) {
				job->u.GCM.ctx = &qp_data->gcm_sgl_ctx;
				job->cipher_mode = IMB_CIPHER_GCM_SGL;
				job->hash_alg = IMB_AUTH_GCM_SGL;
			}
		} else {
			/* For GMAC */
			job->u.GCM.aad = rte_pktmbuf_mtod_offset(m_src,
					uint8_t *, op->sym->auth.data.offset);
			job->u.GCM.aad_len_in_bytes = op->sym->auth.data.length;
			job->cipher_mode = IMB_CIPHER_GCM;
		}
		job->enc_keys = &session->cipher.gcm_key;
		job->dec_keys = &session->cipher.gcm_key;
		break;
	case IMB_AUTH_ZUC_EIA3_BITLEN:
	case IMB_AUTH_ZUC256_EIA3_BITLEN:
		job->u.ZUC_EIA3._key = session->auth.zuc_auth_key;
		job->u.ZUC_EIA3._iv = rte_crypto_op_ctod_offset(op, uint8_t *,
						session->auth_iv.offset);
		break;
	case IMB_AUTH_SNOW3G_UIA2_BITLEN:
		job->u.SNOW3G_UIA2._key = (void *)
			&session->auth.pKeySched_snow3g_auth;
		job->u.SNOW3G_UIA2._iv =
			rte_crypto_op_ctod_offset(op, uint8_t *,
						session->auth_iv.offset);
		break;
	case IMB_AUTH_KASUMI_UIA1:
		job->u.KASUMI_UIA1._key = (void *)
			&session->auth.pKeySched_kasumi_auth;
		break;
	case IMB_AUTH_CHACHA20_POLY1305:
		job->u.CHACHA20_POLY1305.aad = op->sym->aead.aad.data;
		job->u.CHACHA20_POLY1305.aad_len_in_bytes =
			session->aead.aad_len;
		if (sgl) {
			job->u.CHACHA20_POLY1305.ctx = &qp_data->chacha_sgl_ctx;
			job->cipher_mode = IMB_CIPHER_CHACHA20_POLY1305_SGL;
			job->hash_alg = IMB_AUTH_CHACHA20_POLY1305_SGL;
		}
		break;
	default:
		job->u.HMAC._hashed_auth_key_xor_ipad =
			session->auth.pads.inner;
		job->u.HMAC._hashed_auth_key_xor_opad =
			session->auth.pads.outer;

	}

	if (aead)
		m_offset = op->sym->aead.data.offset;
	else
		m_offset = op->sym->cipher.data.offset;

	if (job->cipher_mode == IMB_CIPHER_ZUC_EEA3) {
		job->enc_keys = session->cipher.zuc_cipher_key;
		job->dec_keys = session->cipher.zuc_cipher_key;
		m_offset >>= 3;
	} else if (job->cipher_mode == IMB_CIPHER_SNOW3G_UEA2_BITLEN) {
		job->enc_keys = &session->cipher.pKeySched_snow3g_cipher;
		m_offset = 0;
	} else if (job->cipher_mode == IMB_CIPHER_KASUMI_UEA1_BITLEN) {
		job->enc_keys = &session->cipher.pKeySched_kasumi_cipher;
		m_offset = 0;
	}

	/* Set digest output location */
	if (job->hash_alg != IMB_AUTH_NULL &&
			session->auth.operation == RTE_CRYPTO_AUTH_OP_VERIFY) {
		job->auth_tag_output = qp_data->temp_digests[*digest_idx];
		*digest_idx = (*digest_idx + 1) % IMB_MAX_JOBS;
	} else {
		if (aead)
			job->auth_tag_output = op->sym->aead.digest.data;
		else
			job->auth_tag_output = op->sym->auth.digest.data;

		if (session->auth.req_digest_len !=
				session->auth.gen_digest_len) {
			job->auth_tag_output =
				qp_data->temp_digests[*digest_idx];
			*digest_idx = (*digest_idx + 1) % IMB_MAX_JOBS;
		}
	}
	/*
	 * Multi-buffer library current only support returning a truncated
	 * digest length as specified in the relevant IPsec RFCs
	 */

	/* Set digest length */
	job->auth_tag_output_len_in_bytes = session->auth.gen_digest_len;

	/* Set IV parameters */
	job->iv_len_in_bytes = session->iv.length;

	/* Data Parameters */
	if (sgl) {
		job->src = NULL;
		job->dst = NULL;
	} else {
		job->src = rte_pktmbuf_mtod(m_src, uint8_t *);
		job->dst = rte_pktmbuf_mtod_offset(m_dst, uint8_t *, m_offset);
	}

	switch (job->hash_alg) {
	case IMB_AUTH_AES_CCM:
		job->hash_start_src_offset_in_bytes = op->sym->aead.data.offset;
		job->msg_len_to_hash_in_bytes = op->sym->aead.data.length;

		job->iv = rte_crypto_op_ctod_offset(op, uint8_t *,
			session->iv.offset + 1);
		break;

	case IMB_AUTH_AES_GMAC:
		if (session->cipher.mode == IMB_CIPHER_GCM) {
			job->hash_start_src_offset_in_bytes =
					op->sym->aead.data.offset;
			job->msg_len_to_hash_in_bytes =
					op->sym->aead.data.length;
		} else { /* AES-GMAC only, only AAD used */
			job->msg_len_to_hash_in_bytes = 0;
			job->hash_start_src_offset_in_bytes = 0;
		}

		job->iv = rte_crypto_op_ctod_offset(op, uint8_t *,
				session->iv.offset);
		break;

	case IMB_AUTH_GCM_SGL:
	case IMB_AUTH_CHACHA20_POLY1305_SGL:
		job->hash_start_src_offset_in_bytes = 0;
		job->msg_len_to_hash_in_bytes = 0;
		job->iv = rte_crypto_op_ctod_offset(op, uint8_t *,
			session->iv.offset);
		break;

	case IMB_AUTH_CHACHA20_POLY1305:
		job->hash_start_src_offset_in_bytes =
			op->sym->aead.data.offset;
		job->msg_len_to_hash_in_bytes =
					op->sym->aead.data.length;
		job->iv = rte_crypto_op_ctod_offset(op, uint8_t *,
				session->iv.offset);
		break;
	/* ZUC and SNOW3G require length in bits and offset in bytes */
	case IMB_AUTH_ZUC_EIA3_BITLEN:
	case IMB_AUTH_ZUC256_EIA3_BITLEN:
	case IMB_AUTH_SNOW3G_UIA2_BITLEN:
		auth_off_in_bytes = op->sym->auth.data.offset >> 3;
		ciph_off_in_bytes = op->sym->cipher.data.offset >> 3;
		auth_len_in_bytes = op->sym->auth.data.length >> 3;
		ciph_len_in_bytes = op->sym->cipher.data.length >> 3;

		job->hash_start_src_offset_in_bytes = auth_start_offset(op,
				session, oop, auth_off_in_bytes,
				ciph_off_in_bytes, auth_len_in_bytes,
				ciph_len_in_bytes, lb_sgl);
		job->msg_len_to_hash_in_bits = op->sym->auth.data.length;

		job->iv = rte_crypto_op_ctod_offset(op, uint8_t *,
			session->iv.offset);
		break;

	/* KASUMI requires lengths and offset in bytes */
	case IMB_AUTH_KASUMI_UIA1:
		auth_off_in_bytes = op->sym->auth.data.offset >> 3;
		ciph_off_in_bytes = op->sym->cipher.data.offset >> 3;
		auth_len_in_bytes = op->sym->auth.data.length >> 3;
		ciph_len_in_bytes = op->sym->cipher.data.length >> 3;

		job->hash_start_src_offset_in_bytes = auth_start_offset(op,
				session, oop, auth_off_in_bytes,
				ciph_off_in_bytes, auth_len_in_bytes,
				ciph_len_in_bytes, lb_sgl);
		job->msg_len_to_hash_in_bytes = auth_len_in_bytes;

		job->iv = rte_crypto_op_ctod_offset(op, uint8_t *,
			session->iv.offset);
		break;

	default:
		job->hash_start_src_offset_in_bytes = auth_start_offset(op,
				session, oop, op->sym->auth.data.offset,
				op->sym->cipher.data.offset,
				op->sym->auth.data.length,
				op->sym->cipher.data.length, lb_sgl);
		job->msg_len_to_hash_in_bytes = op->sym->auth.data.length;

		job->iv = rte_crypto_op_ctod_offset(op, uint8_t *,
			session->iv.offset);
	}

	switch (job->cipher_mode) {
	/* ZUC requires length and offset in bytes */
	case IMB_CIPHER_ZUC_EEA3:
		job->cipher_start_src_offset_in_bytes =
					op->sym->cipher.data.offset >> 3;
		job->msg_len_to_cipher_in_bytes =
					op->sym->cipher.data.length >> 3;
		break;
	/* ZUC and SNOW3G require length and offset in bits */
	case IMB_CIPHER_SNOW3G_UEA2_BITLEN:
	case IMB_CIPHER_KASUMI_UEA1_BITLEN:
		job->cipher_start_src_offset_in_bits =
					op->sym->cipher.data.offset;
		job->msg_len_to_cipher_in_bits =
					op->sym->cipher.data.length;
		break;
	case IMB_CIPHER_GCM:
		if (session->cipher.mode == IMB_CIPHER_NULL) {
			/* AES-GMAC only (only AAD used) */
			job->msg_len_to_cipher_in_bytes = 0;
			job->cipher_start_src_offset_in_bytes = 0;
		} else {
			job->cipher_start_src_offset_in_bytes =
					op->sym->aead.data.offset;
			job->msg_len_to_cipher_in_bytes = op->sym->aead.data.length;
		}
		break;
	case IMB_CIPHER_CCM:
	case IMB_CIPHER_CHACHA20_POLY1305:
		job->cipher_start_src_offset_in_bytes =
				op->sym->aead.data.offset;
		job->msg_len_to_cipher_in_bytes = op->sym->aead.data.length;
		break;
	case IMB_CIPHER_GCM_SGL:
	case IMB_CIPHER_CHACHA20_POLY1305_SGL:
		job->msg_len_to_cipher_in_bytes = 0;
		job->cipher_start_src_offset_in_bytes = 0;
		break;
	default:
		job->cipher_start_src_offset_in_bytes =
					op->sym->cipher.data.offset;
		job->msg_len_to_cipher_in_bytes = op->sym->cipher.data.length;
	}

	if (job->cipher_mode == IMB_CIPHER_NULL && oop) {
		memcpy(job->dst + job->cipher_start_src_offset_in_bytes,
			job->src + job->cipher_start_src_offset_in_bytes,
			job->msg_len_to_cipher_in_bytes);
	}

	/* Set user data to be crypto operation data struct */
	job->user_data = op;

	if (sgl) {

		if (lb_sgl)
			return handle_sgl_linear(job, op, m_offset, session);

		base_job = *job;
		job->sgl_state = IMB_SGL_INIT;
		job = IMB_SUBMIT_JOB(mb_mgr);
		total_len = op->sym->aead.data.length;

		src_sgl.m = m_src;
		src_sgl.offset = m_offset;

		while (src_sgl.offset >= src_sgl.m->data_len) {
			src_sgl.offset -= src_sgl.m->data_len;
			src_sgl.m = src_sgl.m->next;

			RTE_ASSERT(src_sgl.m != NULL);
		}

		if (oop) {
			dst_sgl.m = m_dst;
			dst_sgl.offset = m_offset;

			while (dst_sgl.offset >= dst_sgl.m->data_len) {
				dst_sgl.offset -= dst_sgl.m->data_len;
				dst_sgl.m = dst_sgl.m->next;

				RTE_ASSERT(dst_sgl.m != NULL);
			}
		}

		while (job->sgl_state != IMB_SGL_COMPLETE) {
			job = IMB_GET_NEXT_JOB(mb_mgr);
			*job = base_job;
			ret = handle_aead_sgl_job(job, mb_mgr, &total_len,
				&src_sgl, &dst_sgl);
			if (ret < 0)
				return ret;
		}
	}

	return 0;
}

#ifdef AESNI_MB_DOCSIS_SEC_ENABLED
/**
 * Process a crypto operation containing a security op and complete a
 * IMB_JOB job structure for submission to the multi buffer library for
 * processing.
 */
static inline int
set_sec_mb_job_params(IMB_JOB *job, struct ipsec_mb_qp *qp,
			struct rte_crypto_op *op, uint8_t *digest_idx)
{
	struct aesni_mb_qp_data *qp_data = ipsec_mb_get_qp_private_data(qp);
	struct rte_mbuf *m_src, *m_dst;
	struct rte_crypto_sym_op *sym;
	struct aesni_mb_session *session = NULL;

	if (unlikely(op->sess_type != RTE_CRYPTO_OP_SECURITY_SESSION)) {
		op->status = RTE_CRYPTO_OP_STATUS_INVALID_SESSION;
		return -1;
	}
	session = SECURITY_GET_SESS_PRIV(op->sym->session);

	if (unlikely(session == NULL)) {
		op->status = RTE_CRYPTO_OP_STATUS_INVALID_SESSION;
		return -1;
	}
	/* Only DOCSIS protocol operations supported now */
	if (session->cipher.mode != IMB_CIPHER_DOCSIS_SEC_BPI ||
			session->auth.algo != IMB_AUTH_DOCSIS_CRC32) {
		op->status = RTE_CRYPTO_OP_STATUS_ERROR;
		return -1;
	}

	sym = op->sym;
	m_src = sym->m_src;

	if (likely(sym->m_dst == NULL || sym->m_dst == m_src)) {
		/* in-place operation */
		m_dst = m_src;
	} else {
		/* out-of-place operation not supported */
		op->status = RTE_CRYPTO_OP_STATUS_ERROR;
		return -ENOTSUP;
	}

	/* Set crypto operation */
	job->chain_order = session->chain_order;

	/* Set cipher parameters */
	job->cipher_direction = session->cipher.direction;
	job->cipher_mode = session->cipher.mode;

	job->key_len_in_bytes = session->cipher.key_length_in_bytes;
	job->enc_keys = session->cipher.expanded_aes_keys.encode;
	job->dec_keys = session->cipher.expanded_aes_keys.decode;

	/* Set IV parameters */
	job->iv_len_in_bytes = session->iv.length;
	job->iv = (uint8_t *)op + session->iv.offset;

	/* Set authentication parameters */
	job->hash_alg = session->auth.algo;

	/* Set digest output location */
	job->auth_tag_output = qp_data->temp_digests[*digest_idx];
	*digest_idx = (*digest_idx + 1) % IMB_MAX_JOBS;

	/* Set digest length */
	job->auth_tag_output_len_in_bytes = session->auth.gen_digest_len;

	/* Set data parameters */
	job->src = rte_pktmbuf_mtod(m_src, uint8_t *);
	job->dst = rte_pktmbuf_mtod_offset(m_dst, uint8_t *,
						sym->cipher.data.offset);

	job->cipher_start_src_offset_in_bytes = sym->cipher.data.offset;
	job->msg_len_to_cipher_in_bytes = sym->cipher.data.length;

	job->hash_start_src_offset_in_bytes = sym->auth.data.offset;
	job->msg_len_to_hash_in_bytes = sym->auth.data.length;

	job->user_data = op;

	return 0;
}

static inline void
verify_docsis_sec_crc(IMB_JOB *job, uint8_t *status)
{
	uint16_t crc_offset;
	uint8_t *crc;

	if (!job->msg_len_to_hash_in_bytes)
		return;

	crc_offset = job->hash_start_src_offset_in_bytes +
			job->msg_len_to_hash_in_bytes -
			job->cipher_start_src_offset_in_bytes;
	crc = job->dst + crc_offset;

	/* Verify CRC (at the end of the message) */
	if (memcmp(job->auth_tag_output, crc, RTE_ETHER_CRC_LEN) != 0)
		*status = RTE_CRYPTO_OP_STATUS_AUTH_FAILED;
}
#endif

static inline void
verify_digest(IMB_JOB *job, void *digest, uint16_t len, uint8_t *status)
{
	/* Verify digest if required */
	if (memcmp(job->auth_tag_output, digest, len) != 0)
		*status = RTE_CRYPTO_OP_STATUS_AUTH_FAILED;
}

static inline void
generate_digest(IMB_JOB *job, struct rte_crypto_op *op,
		struct aesni_mb_session *sess)
{
	/* No extra copy needed */
	if (likely(sess->auth.req_digest_len == sess->auth.gen_digest_len))
		return;

	/*
	 * This can only happen for HMAC, so only digest
	 * for authentication algos is required
	 */
	memcpy(op->sym->auth.digest.data, job->auth_tag_output,
			sess->auth.req_digest_len);
}

static void
post_process_sgl_linear(struct rte_crypto_op *op, IMB_JOB *job,
		struct aesni_mb_session *sess, uint8_t *linear_buf)
{

	int lb_offset = 0;
	struct rte_mbuf *m_dst = op->sym->m_dst == NULL ?
			op->sym->m_src : op->sym->m_dst;
	uint16_t total_len, dst_len;
	uint64_t auth_len;
	uint8_t *dst;

	total_len = sgl_linear_cipher_auth_len(job, &auth_len);

	if (sess->auth.operation != RTE_CRYPTO_AUTH_OP_VERIFY)
		total_len += job->auth_tag_output_len_in_bytes;

	for (; (m_dst != NULL) && (total_len - lb_offset > 0); m_dst = m_dst->next) {
		dst = rte_pktmbuf_mtod(m_dst, uint8_t *);
		dst_len = RTE_MIN(m_dst->data_len, total_len - lb_offset);
		rte_memcpy(dst, linear_buf + lb_offset, dst_len);
		lb_offset += dst_len;
	}
}

/**
 * Process a completed job and return rte_mbuf which job processed
 *
 * @param qp	Queue Pair to process
 * @param job	IMB_JOB job to process
 *
 * @return
 * - Returns processed crypto operation.
 * - Returns NULL on invalid job
 */
static inline struct rte_crypto_op *
post_process_mb_job(struct ipsec_mb_qp *qp, IMB_JOB *job)
{
	struct rte_crypto_op *op = (struct rte_crypto_op *)job->user_data;
	struct aesni_mb_session *sess = NULL;
	uint8_t *linear_buf = NULL;

#ifdef AESNI_MB_DOCSIS_SEC_ENABLED
	uint8_t is_docsis_sec = 0;

	if (op->sess_type == RTE_CRYPTO_OP_SECURITY_SESSION) {
		/*
		 * Assuming at this point that if it's a security type op, that
		 * this is for DOCSIS
		 */
		is_docsis_sec = 1;
		sess = SECURITY_GET_SESS_PRIV(op->sym->session);
	} else
#endif
		sess = CRYPTODEV_GET_SYM_SESS_PRIV(op->sym->session);

	if (likely(op->status == RTE_CRYPTO_OP_STATUS_NOT_PROCESSED)) {
		switch (job->status) {
		case IMB_STATUS_COMPLETED:
			op->status = RTE_CRYPTO_OP_STATUS_SUCCESS;

			if ((op->sym->m_src->nb_segs > 1 ||
					(op->sym->m_dst != NULL &&
					op->sym->m_dst->nb_segs > 1)) &&
					!imb_lib_support_sgl_algo(sess->cipher.mode)) {
				linear_buf = (uint8_t *) job->user_data2;
				post_process_sgl_linear(op, job, sess, linear_buf);
			}

			if (job->hash_alg == IMB_AUTH_NULL)
				break;

			if (sess->auth.operation == RTE_CRYPTO_AUTH_OP_VERIFY) {
				if (is_aead_algo(job->hash_alg,
						sess->cipher.mode))
					verify_digest(job,
						op->sym->aead.digest.data,
						sess->auth.req_digest_len,
						&op->status);
#ifdef AESNI_MB_DOCSIS_SEC_ENABLED
				else if (is_docsis_sec)
					verify_docsis_sec_crc(job,
						&op->status);
#endif
				else
					verify_digest(job,
						op->sym->auth.digest.data,
						sess->auth.req_digest_len,
						&op->status);
			} else
				generate_digest(job, op, sess);
			break;
		default:
			op->status = RTE_CRYPTO_OP_STATUS_ERROR;
		}
		rte_free(linear_buf);
	}

	/* Free session if a session-less crypto op */
	if (op->sess_type == RTE_CRYPTO_OP_SESSIONLESS) {
		memset(sess, 0, sizeof(struct aesni_mb_session));
		rte_mempool_put(qp->sess_mp, op->sym->session);
		op->sym->session = NULL;
	}

	return op;
}

static inline void
post_process_mb_sync_job(IMB_JOB *job)
{
	uint32_t *st;

	st = job->user_data;
	st[0] = (job->status == IMB_STATUS_COMPLETED) ? 0 : EBADMSG;
}

/**
 * Process a completed IMB_JOB job and keep processing jobs until
 * get_completed_job return NULL
 *
 * @param qp		Queue Pair to process
 * @param mb_mgr	IMB_MGR to use
 * @param job		IMB_JOB job
 * @param ops		crypto ops to fill
 * @param nb_ops	number of crypto ops
 *
 * @return
 * - Number of processed jobs
 */
static unsigned
handle_completed_jobs(struct ipsec_mb_qp *qp, IMB_MGR *mb_mgr,
		IMB_JOB *job, struct rte_crypto_op **ops,
		uint16_t nb_ops)
{
	struct rte_crypto_op *op = NULL;
	uint16_t processed_jobs = 0;

	while (job != NULL) {
		op = post_process_mb_job(qp, job);

		if (op) {
			ops[processed_jobs++] = op;
			qp->stats.dequeued_count++;
		} else {
			qp->stats.dequeue_err_count++;
			break;
		}
		if (processed_jobs == nb_ops)
			break;

		job = IMB_GET_COMPLETED_JOB(mb_mgr);
	}

	return processed_jobs;
}

static inline uint32_t
handle_completed_sync_jobs(IMB_JOB *job, IMB_MGR *mb_mgr)
{
	uint32_t i;

	for (i = 0; job != NULL; i++, job = IMB_GET_COMPLETED_JOB(mb_mgr))
		post_process_mb_sync_job(job);

	return i;
}

static inline uint32_t
flush_mb_sync_mgr(IMB_MGR *mb_mgr)
{
	IMB_JOB *job;

	job = IMB_FLUSH_JOB(mb_mgr);
	return handle_completed_sync_jobs(job, mb_mgr);
}

static inline uint16_t
flush_mb_mgr(struct ipsec_mb_qp *qp, IMB_MGR *mb_mgr,
		struct rte_crypto_op **ops, uint16_t nb_ops)
{
	int processed_ops = 0;

	/* Flush the remaining jobs */
	IMB_JOB *job = IMB_FLUSH_JOB(mb_mgr);

	if (job)
		processed_ops += handle_completed_jobs(qp, mb_mgr, job,
				&ops[processed_ops], nb_ops - processed_ops);

	return processed_ops;
}

static inline IMB_JOB *
set_job_null_op(IMB_JOB *job, struct rte_crypto_op *op)
{
	job->chain_order = IMB_ORDER_HASH_CIPHER;
	job->cipher_mode = IMB_CIPHER_NULL;
	job->hash_alg = IMB_AUTH_NULL;
	job->cipher_direction = IMB_DIR_DECRYPT;

	/* Set user data to be crypto operation data struct */
	job->user_data = op;

	return job;
}

static uint16_t
aesni_mb_dequeue_burst(void *queue_pair, struct rte_crypto_op **ops,
		uint16_t nb_ops)
{
	struct ipsec_mb_qp *qp = queue_pair;
	IMB_MGR *mb_mgr = qp->mb_mgr;
	struct rte_crypto_op *op;
	IMB_JOB *job;
	int retval, processed_jobs = 0;

	if (unlikely(nb_ops == 0 || mb_mgr == NULL))
		return 0;

	uint8_t digest_idx = qp->digest_idx;

	do {
		/* Get next free mb job struct from mb manager */
		job = IMB_GET_NEXT_JOB(mb_mgr);
		if (unlikely(job == NULL)) {
			/* if no free mb job structs we need to flush mb_mgr */
			processed_jobs += flush_mb_mgr(qp, mb_mgr,
					&ops[processed_jobs],
					nb_ops - processed_jobs);

			if (nb_ops == processed_jobs)
				break;

			job = IMB_GET_NEXT_JOB(mb_mgr);
		}

		/*
		 * Get next operation to process from ingress queue.
		 * There is no need to return the job to the IMB_MGR
		 * if there are no more operations to process, since the IMB_MGR
		 * can use that pointer again in next get_next calls.
		 */
		retval = rte_ring_dequeue(qp->ingress_queue, (void **)&op);
		if (retval < 0)
			break;

#ifdef AESNI_MB_DOCSIS_SEC_ENABLED
		if (op->sess_type == RTE_CRYPTO_OP_SECURITY_SESSION)
			retval = set_sec_mb_job_params(job, qp, op,
						&digest_idx);
		else
#endif
			retval = set_mb_job_params(job, qp, op,
				&digest_idx, mb_mgr);

		if (unlikely(retval != 0)) {
			qp->stats.dequeue_err_count++;
			set_job_null_op(job, op);
		}

		/* Submit job to multi-buffer for processing */
#ifdef RTE_LIBRTE_PMD_AESNI_MB_DEBUG
		job = IMB_SUBMIT_JOB(mb_mgr);
#else
		job = IMB_SUBMIT_JOB_NOCHECK(mb_mgr);
#endif
		/*
		 * If submit returns a processed job then handle it,
		 * before submitting subsequent jobs
		 */
		if (job)
			processed_jobs += handle_completed_jobs(qp, mb_mgr,
					job, &ops[processed_jobs],
					nb_ops - processed_jobs);

	} while (processed_jobs < nb_ops);

	qp->digest_idx = digest_idx;

	if (processed_jobs < 1)
		processed_jobs += flush_mb_mgr(qp, mb_mgr,
				&ops[processed_jobs],
				nb_ops - processed_jobs);

	return processed_jobs;
}

static inline int
check_crypto_sgl(union rte_crypto_sym_ofs so, const struct rte_crypto_sgl *sgl)
{
	/* no multi-seg support with current AESNI-MB PMD */
	if (sgl->num != 1)
		return -ENOTSUP;
	else if (so.ofs.cipher.head + so.ofs.cipher.tail > sgl->vec[0].len)
		return -EINVAL;
	return 0;
}

static inline IMB_JOB *
submit_sync_job(IMB_MGR *mb_mgr)
{
#ifdef RTE_LIBRTE_PMD_AESNI_MB_DEBUG
	return IMB_SUBMIT_JOB(mb_mgr);
#else
	return IMB_SUBMIT_JOB_NOCHECK(mb_mgr);
#endif
}

static inline uint32_t
generate_sync_dgst(struct rte_crypto_sym_vec *vec,
	const uint8_t dgst[][DIGEST_LENGTH_MAX], uint32_t len)
{
	uint32_t i, k;

	for (i = 0, k = 0; i != vec->num; i++) {
		if (vec->status[i] == 0) {
			memcpy(vec->digest[i].va, dgst[i], len);
			k++;
		}
	}

	return k;
}

static inline uint32_t
verify_sync_dgst(struct rte_crypto_sym_vec *vec,
	const uint8_t dgst[][DIGEST_LENGTH_MAX], uint32_t len)
{
	uint32_t i, k;

	for (i = 0, k = 0; i != vec->num; i++) {
		if (vec->status[i] == 0) {
			if (memcmp(vec->digest[i].va, dgst[i], len) != 0)
				vec->status[i] = EBADMSG;
			else
				k++;
		}
	}

	return k;
}

static uint32_t
aesni_mb_process_bulk(struct rte_cryptodev *dev __rte_unused,
	struct rte_cryptodev_sym_session *sess, union rte_crypto_sym_ofs sofs,
	struct rte_crypto_sym_vec *vec)
{
	int32_t ret;
	uint32_t i, j, k, len;
	void *buf;
	IMB_JOB *job;
	IMB_MGR *mb_mgr;
	struct aesni_mb_session *s = CRYPTODEV_GET_SYM_SESS_PRIV(sess);
	uint8_t tmp_dgst[vec->num][DIGEST_LENGTH_MAX];

	/* get per-thread MB MGR, create one if needed */
	mb_mgr = get_per_thread_mb_mgr();
	if (unlikely(mb_mgr == NULL))
		return 0;

	for (i = 0, j = 0, k = 0; i != vec->num; i++) {
		ret = check_crypto_sgl(sofs, vec->src_sgl + i);
		if (ret != 0) {
			vec->status[i] = ret;
			continue;
		}

		buf = vec->src_sgl[i].vec[0].base;
		len = vec->src_sgl[i].vec[0].len;

		job = IMB_GET_NEXT_JOB(mb_mgr);
		if (job == NULL) {
			k += flush_mb_sync_mgr(mb_mgr);
			job = IMB_GET_NEXT_JOB(mb_mgr);
			RTE_ASSERT(job != NULL);
		}

		/* Submit job for processing */
		set_cpu_mb_job_params(job, s, sofs, buf, len, &vec->iv[i],
			&vec->aad[i], tmp_dgst[i], &vec->status[i]);
		job = submit_sync_job(mb_mgr);
		j++;

		/* handle completed jobs */
		k += handle_completed_sync_jobs(job, mb_mgr);
	}

	/* flush remaining jobs */
	while (k != j)
		k += flush_mb_sync_mgr(mb_mgr);

	/* finish processing for successful jobs: check/update digest */
	if (k != 0) {
		if (s->auth.operation == RTE_CRYPTO_AUTH_OP_VERIFY)
			k = verify_sync_dgst(vec,
				(const uint8_t (*)[DIGEST_LENGTH_MAX])tmp_dgst,
				s->auth.req_digest_len);
		else
			k = generate_sync_dgst(vec,
				(const uint8_t (*)[DIGEST_LENGTH_MAX])tmp_dgst,
				s->auth.req_digest_len);
	}

	return k;
}

struct rte_cryptodev_ops aesni_mb_pmd_ops = {
	.dev_configure = ipsec_mb_config,
	.dev_start = ipsec_mb_start,
	.dev_stop = ipsec_mb_stop,
	.dev_close = ipsec_mb_close,

	.stats_get = ipsec_mb_stats_get,
	.stats_reset = ipsec_mb_stats_reset,

	.dev_infos_get = ipsec_mb_info_get,

	.queue_pair_setup = ipsec_mb_qp_setup,
	.queue_pair_release = ipsec_mb_qp_release,

	.sym_cpu_process = aesni_mb_process_bulk,

	.sym_session_get_size = ipsec_mb_sym_session_get_size,
	.sym_session_configure = ipsec_mb_sym_session_configure,
	.sym_session_clear = ipsec_mb_sym_session_clear
};

#ifdef AESNI_MB_DOCSIS_SEC_ENABLED
/**
 * Configure a aesni multi-buffer session from a security session
 * configuration
 */
static int
aesni_mb_pmd_sec_sess_create(void *dev, struct rte_security_session_conf *conf,
		struct rte_security_session *sess)
{
	void *sess_private_data = SECURITY_GET_SESS_PRIV(sess);
	struct rte_cryptodev *cdev = (struct rte_cryptodev *)dev;
	int ret;

	if (conf->action_type != RTE_SECURITY_ACTION_TYPE_LOOKASIDE_PROTOCOL ||
			conf->protocol != RTE_SECURITY_PROTOCOL_DOCSIS) {
		IPSEC_MB_LOG(ERR, "Invalid security protocol");
		return -EINVAL;
	}

	ret = aesni_mb_set_docsis_sec_session_parameters(cdev, conf,
			sess_private_data);

	if (ret != 0) {
		IPSEC_MB_LOG(ERR, "Failed to configure session parameters");
		return ret;
	}

	return ret;
}

/** Clear the memory of session so it does not leave key material behind */
static int
aesni_mb_pmd_sec_sess_destroy(void *dev __rte_unused,
		struct rte_security_session *sess)
{
	void *sess_priv = SECURITY_GET_SESS_PRIV(sess);

	if (sess_priv) {
		memset(sess_priv, 0, sizeof(struct aesni_mb_session));
	}
	return 0;
}

static unsigned int
aesni_mb_pmd_sec_sess_get_size(void *device __rte_unused)
{
	return sizeof(struct aesni_mb_session);
}

/** Get security capabilities for aesni multi-buffer */
static const struct rte_security_capability *
aesni_mb_pmd_sec_capa_get(void *device __rte_unused)
{
	return aesni_mb_pmd_security_cap;
}

static struct rte_security_ops aesni_mb_pmd_sec_ops = {
		.session_create = aesni_mb_pmd_sec_sess_create,
		.session_update = NULL,
		.session_get_size = aesni_mb_pmd_sec_sess_get_size,
		.session_stats_get = NULL,
		.session_destroy = aesni_mb_pmd_sec_sess_destroy,
		.set_pkt_metadata = NULL,
		.capabilities_get = aesni_mb_pmd_sec_capa_get
};

struct rte_security_ops *rte_aesni_mb_pmd_sec_ops = &aesni_mb_pmd_sec_ops;

static int
aesni_mb_configure_dev(struct rte_cryptodev *dev)
{
	struct rte_security_ctx *security_instance;

	security_instance = rte_malloc("aesni_mb_sec",
				sizeof(struct rte_security_ctx),
				RTE_CACHE_LINE_SIZE);
	if (security_instance != NULL) {
		security_instance->device = (void *)dev;
		security_instance->ops = rte_aesni_mb_pmd_sec_ops;
		security_instance->sess_cnt = 0;
		dev->security_ctx = security_instance;

		return 0;
	}

	return -ENOMEM;
}

#endif

static int
aesni_mb_probe(struct rte_vdev_device *vdev)
{
	return ipsec_mb_create(vdev, IPSEC_MB_PMD_TYPE_AESNI_MB);
}

static struct rte_vdev_driver cryptodev_aesni_mb_pmd_drv = {
	.probe = aesni_mb_probe,
	.remove = ipsec_mb_remove
};

static struct cryptodev_driver aesni_mb_crypto_drv;

RTE_PMD_REGISTER_VDEV(CRYPTODEV_NAME_AESNI_MB_PMD,
	cryptodev_aesni_mb_pmd_drv);
RTE_PMD_REGISTER_ALIAS(CRYPTODEV_NAME_AESNI_MB_PMD, cryptodev_aesni_mb_pmd);
RTE_PMD_REGISTER_PARAM_STRING(CRYPTODEV_NAME_AESNI_MB_PMD,
			"max_nb_queue_pairs=<int> socket_id=<int>");
RTE_PMD_REGISTER_CRYPTO_DRIVER(
	aesni_mb_crypto_drv,
	cryptodev_aesni_mb_pmd_drv.driver,
	pmd_driver_id_aesni_mb);

/* Constructor function to register aesni-mb PMD */
RTE_INIT(ipsec_mb_register_aesni_mb)
{
	struct ipsec_mb_internals *aesni_mb_data =
		&ipsec_mb_pmds[IPSEC_MB_PMD_TYPE_AESNI_MB];

	aesni_mb_data->caps = aesni_mb_capabilities;
	aesni_mb_data->dequeue_burst = aesni_mb_dequeue_burst;
	aesni_mb_data->feature_flags = RTE_CRYPTODEV_FF_SYMMETRIC_CRYPTO |
			RTE_CRYPTODEV_FF_SYM_OPERATION_CHAINING |
			RTE_CRYPTODEV_FF_OOP_LB_IN_LB_OUT |
			RTE_CRYPTODEV_FF_SYM_CPU_CRYPTO |
			RTE_CRYPTODEV_FF_NON_BYTE_ALIGNED_DATA |
			RTE_CRYPTODEV_FF_SYM_SESSIONLESS |
			RTE_CRYPTODEV_FF_IN_PLACE_SGL |
			RTE_CRYPTODEV_FF_OOP_SGL_IN_SGL_OUT |
			RTE_CRYPTODEV_FF_OOP_LB_IN_SGL_OUT |
			RTE_CRYPTODEV_FF_OOP_SGL_IN_LB_OUT;

	aesni_mb_data->internals_priv_size = 0;
	aesni_mb_data->ops = &aesni_mb_pmd_ops;
	aesni_mb_data->qp_priv_size = sizeof(struct aesni_mb_qp_data);
	aesni_mb_data->queue_pair_configure = NULL;
#ifdef AESNI_MB_DOCSIS_SEC_ENABLED
	aesni_mb_data->security_ops = &aesni_mb_pmd_sec_ops;
	aesni_mb_data->dev_config = aesni_mb_configure_dev;
	aesni_mb_data->feature_flags |= RTE_CRYPTODEV_FF_SECURITY;
#endif
	aesni_mb_data->session_configure = aesni_mb_session_configure;
	aesni_mb_data->session_priv_size = sizeof(struct aesni_mb_session);
}
