// SPDX-License-Identifier: (BSD-3-Clause OR GPL-2.0-only)
/* Copyright(c) 2014 - 2020 Intel Corporation */
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/crypto.h>
#include <crypto/internal/aead.h>
#include <crypto/internal/cipher.h>
#include <crypto/internal/skcipher.h>
#include <crypto/aes.h>
#include <crypto/sha1.h>
#include <crypto/sha2.h>
#include <crypto/hash.h>
#include <crypto/hmac.h>
#include <crypto/algapi.h>
#include <crypto/authenc.h>
#include <crypto/scatterwalk.h>
#include <crypto/xts.h>
#include <linux/dma-mapping.h>
#include "adf_accel_devices.h"
#include "qat_algs_send.h"
#include "adf_common_drv.h"
#include "qat_crypto.h"
#include "icp_qat_hw.h"
#include "icp_qat_fw.h"
#include "icp_qat_fw_la.h"
#include "qat_bl.h"

#define QAT_AES_HW_CONFIG_ENC(alg, mode) \
	ICP_QAT_HW_CIPHER_CONFIG_BUILD(mode, alg, \
				       ICP_QAT_HW_CIPHER_NO_CONVERT, \
				       ICP_QAT_HW_CIPHER_ENCRYPT)

#define QAT_AES_HW_CONFIG_DEC(alg, mode) \
	ICP_QAT_HW_CIPHER_CONFIG_BUILD(mode, alg, \
				       ICP_QAT_HW_CIPHER_KEY_CONVERT, \
				       ICP_QAT_HW_CIPHER_DECRYPT)

#define QAT_AES_HW_CONFIG_DEC_NO_CONV(alg, mode) \
	ICP_QAT_HW_CIPHER_CONFIG_BUILD(mode, alg, \
				       ICP_QAT_HW_CIPHER_NO_CONVERT, \
				       ICP_QAT_HW_CIPHER_DECRYPT)

#define HW_CAP_AES_V2(accel_dev) \
	(GET_HW_DATA(accel_dev)->accel_capabilities_mask & \
	 ICP_ACCEL_CAPABILITIES_AES_V2)

static DEFINE_MUTEX(algs_lock);
static unsigned int active_devs;

/* Common content descriptor */
struct qat_alg_cd {
	union {
		struct qat_enc { /* Encrypt content desc */
			struct icp_qat_hw_cipher_algo_blk cipher;
			struct icp_qat_hw_auth_algo_blk hash;
		} qat_enc_cd;
		struct qat_dec { /* Decrypt content desc */
			struct icp_qat_hw_auth_algo_blk hash;
			struct icp_qat_hw_cipher_algo_blk cipher;
		} qat_dec_cd;
	};
} __aligned(64);

struct qat_alg_aead_ctx {
	struct qat_alg_cd *enc_cd;
	struct qat_alg_cd *dec_cd;
	dma_addr_t enc_cd_paddr;
	dma_addr_t dec_cd_paddr;
	struct icp_qat_fw_la_bulk_req enc_fw_req;
	struct icp_qat_fw_la_bulk_req dec_fw_req;
	struct crypto_shash *hash_tfm;
	enum icp_qat_hw_auth_algo qat_hash_alg;
	struct qat_crypto_instance *inst;
	union {
		struct sha1_state sha1;
		struct sha256_state sha256;
		struct sha512_state sha512;
	};
	char ipad[SHA512_BLOCK_SIZE]; /* sufficient for SHA-1/SHA-256 as well */
	char opad[SHA512_BLOCK_SIZE];
};

struct qat_alg_skcipher_ctx {
	struct icp_qat_hw_cipher_algo_blk *enc_cd;
	struct icp_qat_hw_cipher_algo_blk *dec_cd;
	dma_addr_t enc_cd_paddr;
	dma_addr_t dec_cd_paddr;
	struct icp_qat_fw_la_bulk_req enc_fw_req;
	struct icp_qat_fw_la_bulk_req dec_fw_req;
	struct qat_crypto_instance *inst;
	struct crypto_skcipher *ftfm;
	struct crypto_cipher *tweak;
	bool fallback;
	int mode;
};

static int qat_get_inter_state_size(enum icp_qat_hw_auth_algo qat_hash_alg)
{
	switch (qat_hash_alg) {
	case ICP_QAT_HW_AUTH_ALGO_SHA1:
		return ICP_QAT_HW_SHA1_STATE1_SZ;
	case ICP_QAT_HW_AUTH_ALGO_SHA256:
		return ICP_QAT_HW_SHA256_STATE1_SZ;
	case ICP_QAT_HW_AUTH_ALGO_SHA512:
		return ICP_QAT_HW_SHA512_STATE1_SZ;
	default:
		return -EFAULT;
	}
	return -EFAULT;
}

static int qat_alg_do_precomputes(struct icp_qat_hw_auth_algo_blk *hash,
				  struct qat_alg_aead_ctx *ctx,
				  const u8 *auth_key,
				  unsigned int auth_keylen)
{
	SHASH_DESC_ON_STACK(shash, ctx->hash_tfm);
	int block_size = crypto_shash_blocksize(ctx->hash_tfm);
	int digest_size = crypto_shash_digestsize(ctx->hash_tfm);
	__be32 *hash_state_out;
	__be64 *hash512_state_out;
	int i, offset;

	memset(ctx->ipad, 0, block_size);
	memset(ctx->opad, 0, block_size);
	shash->tfm = ctx->hash_tfm;

	if (auth_keylen > block_size) {
		int ret = crypto_shash_digest(shash, auth_key,
					      auth_keylen, ctx->ipad);
		if (ret)
			return ret;

		memcpy(ctx->opad, ctx->ipad, digest_size);
	} else {
		memcpy(ctx->ipad, auth_key, auth_keylen);
		memcpy(ctx->opad, auth_key, auth_keylen);
	}

	for (i = 0; i < block_size; i++) {
		char *ipad_ptr = ctx->ipad + i;
		char *opad_ptr = ctx->opad + i;
		*ipad_ptr ^= HMAC_IPAD_VALUE;
		*opad_ptr ^= HMAC_OPAD_VALUE;
	}

	if (crypto_shash_init(shash))
		return -EFAULT;

	if (crypto_shash_update(shash, ctx->ipad, block_size))
		return -EFAULT;

	hash_state_out = (__be32 *)hash->sha.state1;
	hash512_state_out = (__be64 *)hash_state_out;

	switch (ctx->qat_hash_alg) {
	case ICP_QAT_HW_AUTH_ALGO_SHA1:
		if (crypto_shash_export(shash, &ctx->sha1))
			return -EFAULT;
		for (i = 0; i < digest_size >> 2; i++, hash_state_out++)
			*hash_state_out = cpu_to_be32(ctx->sha1.state[i]);
		break;
	case ICP_QAT_HW_AUTH_ALGO_SHA256:
		if (crypto_shash_export(shash, &ctx->sha256))
			return -EFAULT;
		for (i = 0; i < digest_size >> 2; i++, hash_state_out++)
			*hash_state_out = cpu_to_be32(ctx->sha256.state[i]);
		break;
	case ICP_QAT_HW_AUTH_ALGO_SHA512:
		if (crypto_shash_export(shash, &ctx->sha512))
			return -EFAULT;
		for (i = 0; i < digest_size >> 3; i++, hash512_state_out++)
			*hash512_state_out = cpu_to_be64(ctx->sha512.state[i]);
		break;
	default:
		return -EFAULT;
	}

	if (crypto_shash_init(shash))
		return -EFAULT;

	if (crypto_shash_update(shash, ctx->opad, block_size))
		return -EFAULT;

	offset = round_up(qat_get_inter_state_size(ctx->qat_hash_alg), 8);
	if (offset < 0)
		return -EFAULT;

	hash_state_out = (__be32 *)(hash->sha.state1 + offset);
	hash512_state_out = (__be64 *)hash_state_out;

	switch (ctx->qat_hash_alg) {
	case ICP_QAT_HW_AUTH_ALGO_SHA1:
		if (crypto_shash_export(shash, &ctx->sha1))
			return -EFAULT;
		for (i = 0; i < digest_size >> 2; i++, hash_state_out++)
			*hash_state_out = cpu_to_be32(ctx->sha1.state[i]);
		break;
	case ICP_QAT_HW_AUTH_ALGO_SHA256:
		if (crypto_shash_export(shash, &ctx->sha256))
			return -EFAULT;
		for (i = 0; i < digest_size >> 2; i++, hash_state_out++)
			*hash_state_out = cpu_to_be32(ctx->sha256.state[i]);
		break;
	case ICP_QAT_HW_AUTH_ALGO_SHA512:
		if (crypto_shash_export(shash, &ctx->sha512))
			return -EFAULT;
		for (i = 0; i < digest_size >> 3; i++, hash512_state_out++)
			*hash512_state_out = cpu_to_be64(ctx->sha512.state[i]);
		break;
	default:
		return -EFAULT;
	}
	memzero_explicit(ctx->ipad, block_size);
	memzero_explicit(ctx->opad, block_size);
	return 0;
}

static void qat_alg_init_common_hdr(struct icp_qat_fw_comn_req_hdr *header)
{
	header->hdr_flags =
		ICP_QAT_FW_COMN_HDR_FLAGS_BUILD(ICP_QAT_FW_COMN_REQ_FLAG_SET);
	header->service_type = ICP_QAT_FW_COMN_REQ_CPM_FW_LA;
	header->comn_req_flags =
		ICP_QAT_FW_COMN_FLAGS_BUILD(QAT_COMN_CD_FLD_TYPE_64BIT_ADR,
					    QAT_COMN_PTR_TYPE_SGL);
	ICP_QAT_FW_LA_PARTIAL_SET(header->serv_specif_flags,
				  ICP_QAT_FW_LA_PARTIAL_NONE);
	ICP_QAT_FW_LA_CIPH_IV_FLD_FLAG_SET(header->serv_specif_flags,
					   ICP_QAT_FW_CIPH_IV_16BYTE_DATA);
	ICP_QAT_FW_LA_PROTO_SET(header->serv_specif_flags,
				ICP_QAT_FW_LA_NO_PROTO);
	ICP_QAT_FW_LA_UPDATE_STATE_SET(header->serv_specif_flags,
				       ICP_QAT_FW_LA_NO_UPDATE_STATE);
}

static int qat_alg_aead_init_enc_session(struct crypto_aead *aead_tfm,
					 int alg,
					 struct crypto_authenc_keys *keys,
					 int mode)
{
	struct qat_alg_aead_ctx *ctx = crypto_aead_ctx(aead_tfm);
	unsigned int digestsize = crypto_aead_authsize(aead_tfm);
	struct qat_enc *enc_ctx = &ctx->enc_cd->qat_enc_cd;
	struct icp_qat_hw_cipher_algo_blk *cipher = &enc_ctx->cipher;
	struct icp_qat_hw_auth_algo_blk *hash =
		(struct icp_qat_hw_auth_algo_blk *)((char *)enc_ctx +
		sizeof(struct icp_qat_hw_auth_setup) + keys->enckeylen);
	struct icp_qat_fw_la_bulk_req *req_tmpl = &ctx->enc_fw_req;
	struct icp_qat_fw_comn_req_hdr_cd_pars *cd_pars = &req_tmpl->cd_pars;
	struct icp_qat_fw_comn_req_hdr *header = &req_tmpl->comn_hdr;
	void *ptr = &req_tmpl->cd_ctrl;
	struct icp_qat_fw_cipher_cd_ctrl_hdr *cipher_cd_ctrl = ptr;
	struct icp_qat_fw_auth_cd_ctrl_hdr *hash_cd_ctrl = ptr;

	/* CD setup */
	cipher->aes.cipher_config.val = QAT_AES_HW_CONFIG_ENC(alg, mode);
	memcpy(cipher->aes.key, keys->enckey, keys->enckeylen);
	hash->sha.inner_setup.auth_config.config =
		ICP_QAT_HW_AUTH_CONFIG_BUILD(ICP_QAT_HW_AUTH_MODE1,
					     ctx->qat_hash_alg, digestsize);
	hash->sha.inner_setup.auth_counter.counter =
		cpu_to_be32(crypto_shash_blocksize(ctx->hash_tfm));

	if (qat_alg_do_precomputes(hash, ctx, keys->authkey, keys->authkeylen))
		return -EFAULT;

	/* Request setup */
	qat_alg_init_common_hdr(header);
	header->service_cmd_id = ICP_QAT_FW_LA_CMD_CIPHER_HASH;
	ICP_QAT_FW_LA_DIGEST_IN_BUFFER_SET(header->serv_specif_flags,
					   ICP_QAT_FW_LA_DIGEST_IN_BUFFER);
	ICP_QAT_FW_LA_RET_AUTH_SET(header->serv_specif_flags,
				   ICP_QAT_FW_LA_RET_AUTH_RES);
	ICP_QAT_FW_LA_CMP_AUTH_SET(header->serv_specif_flags,
				   ICP_QAT_FW_LA_NO_CMP_AUTH_RES);
	cd_pars->u.s.content_desc_addr = ctx->enc_cd_paddr;
	cd_pars->u.s.content_desc_params_sz = sizeof(struct qat_alg_cd) >> 3;

	/* Cipher CD config setup */
	cipher_cd_ctrl->cipher_key_sz = keys->enckeylen >> 3;
	cipher_cd_ctrl->cipher_state_sz = AES_BLOCK_SIZE >> 3;
	cipher_cd_ctrl->cipher_cfg_offset = 0;
	ICP_QAT_FW_COMN_CURR_ID_SET(cipher_cd_ctrl, ICP_QAT_FW_SLICE_CIPHER);
	ICP_QAT_FW_COMN_NEXT_ID_SET(cipher_cd_ctrl, ICP_QAT_FW_SLICE_AUTH);
	/* Auth CD config setup */
	hash_cd_ctrl->hash_cfg_offset = ((char *)hash - (char *)cipher) >> 3;
	hash_cd_ctrl->hash_flags = ICP_QAT_FW_AUTH_HDR_FLAG_NO_NESTED;
	hash_cd_ctrl->inner_res_sz = digestsize;
	hash_cd_ctrl->final_sz = digestsize;

	switch (ctx->qat_hash_alg) {
	case ICP_QAT_HW_AUTH_ALGO_SHA1:
		hash_cd_ctrl->inner_state1_sz =
			round_up(ICP_QAT_HW_SHA1_STATE1_SZ, 8);
		hash_cd_ctrl->inner_state2_sz =
			round_up(ICP_QAT_HW_SHA1_STATE2_SZ, 8);
		break;
	case ICP_QAT_HW_AUTH_ALGO_SHA256:
		hash_cd_ctrl->inner_state1_sz = ICP_QAT_HW_SHA256_STATE1_SZ;
		hash_cd_ctrl->inner_state2_sz = ICP_QAT_HW_SHA256_STATE2_SZ;
		break;
	case ICP_QAT_HW_AUTH_ALGO_SHA512:
		hash_cd_ctrl->inner_state1_sz = ICP_QAT_HW_SHA512_STATE1_SZ;
		hash_cd_ctrl->inner_state2_sz = ICP_QAT_HW_SHA512_STATE2_SZ;
		break;
	default:
		break;
	}
	hash_cd_ctrl->inner_state2_offset = hash_cd_ctrl->hash_cfg_offset +
			((sizeof(struct icp_qat_hw_auth_setup) +
			 round_up(hash_cd_ctrl->inner_state1_sz, 8)) >> 3);
	ICP_QAT_FW_COMN_CURR_ID_SET(hash_cd_ctrl, ICP_QAT_FW_SLICE_AUTH);
	ICP_QAT_FW_COMN_NEXT_ID_SET(hash_cd_ctrl, ICP_QAT_FW_SLICE_DRAM_WR);
	return 0;
}

static int qat_alg_aead_init_dec_session(struct crypto_aead *aead_tfm,
					 int alg,
					 struct crypto_authenc_keys *keys,
					 int mode)
{
	struct qat_alg_aead_ctx *ctx = crypto_aead_ctx(aead_tfm);
	unsigned int digestsize = crypto_aead_authsize(aead_tfm);
	struct qat_dec *dec_ctx = &ctx->dec_cd->qat_dec_cd;
	struct icp_qat_hw_auth_algo_blk *hash = &dec_ctx->hash;
	struct icp_qat_hw_cipher_algo_blk *cipher =
		(struct icp_qat_hw_cipher_algo_blk *)((char *)dec_ctx +
		sizeof(struct icp_qat_hw_auth_setup) +
		roundup(crypto_shash_digestsize(ctx->hash_tfm), 8) * 2);
	struct icp_qat_fw_la_bulk_req *req_tmpl = &ctx->dec_fw_req;
	struct icp_qat_fw_comn_req_hdr_cd_pars *cd_pars = &req_tmpl->cd_pars;
	struct icp_qat_fw_comn_req_hdr *header = &req_tmpl->comn_hdr;
	void *ptr = &req_tmpl->cd_ctrl;
	struct icp_qat_fw_cipher_cd_ctrl_hdr *cipher_cd_ctrl = ptr;
	struct icp_qat_fw_auth_cd_ctrl_hdr *hash_cd_ctrl = ptr;
	struct icp_qat_fw_la_auth_req_params *auth_param =
		(struct icp_qat_fw_la_auth_req_params *)
		((char *)&req_tmpl->serv_specif_rqpars +
		sizeof(struct icp_qat_fw_la_cipher_req_params));

	/* CD setup */
	cipher->aes.cipher_config.val = QAT_AES_HW_CONFIG_DEC(alg, mode);
	memcpy(cipher->aes.key, keys->enckey, keys->enckeylen);
	hash->sha.inner_setup.auth_config.config =
		ICP_QAT_HW_AUTH_CONFIG_BUILD(ICP_QAT_HW_AUTH_MODE1,
					     ctx->qat_hash_alg,
					     digestsize);
	hash->sha.inner_setup.auth_counter.counter =
		cpu_to_be32(crypto_shash_blocksize(ctx->hash_tfm));

	if (qat_alg_do_precomputes(hash, ctx, keys->authkey, keys->authkeylen))
		return -EFAULT;

	/* Request setup */
	qat_alg_init_common_hdr(header);
	header->service_cmd_id = ICP_QAT_FW_LA_CMD_HASH_CIPHER;
	ICP_QAT_FW_LA_DIGEST_IN_BUFFER_SET(header->serv_specif_flags,
					   ICP_QAT_FW_LA_DIGEST_IN_BUFFER);
	ICP_QAT_FW_LA_RET_AUTH_SET(header->serv_specif_flags,
				   ICP_QAT_FW_LA_NO_RET_AUTH_RES);
	ICP_QAT_FW_LA_CMP_AUTH_SET(header->serv_specif_flags,
				   ICP_QAT_FW_LA_CMP_AUTH_RES);
	cd_pars->u.s.content_desc_addr = ctx->dec_cd_paddr;
	cd_pars->u.s.content_desc_params_sz = sizeof(struct qat_alg_cd) >> 3;

	/* Cipher CD config setup */
	cipher_cd_ctrl->cipher_key_sz = keys->enckeylen >> 3;
	cipher_cd_ctrl->cipher_state_sz = AES_BLOCK_SIZE >> 3;
	cipher_cd_ctrl->cipher_cfg_offset =
		(sizeof(struct icp_qat_hw_auth_setup) +
		 roundup(crypto_shash_digestsize(ctx->hash_tfm), 8) * 2) >> 3;
	ICP_QAT_FW_COMN_CURR_ID_SET(cipher_cd_ctrl, ICP_QAT_FW_SLICE_CIPHER);
	ICP_QAT_FW_COMN_NEXT_ID_SET(cipher_cd_ctrl, ICP_QAT_FW_SLICE_DRAM_WR);

	/* Auth CD config setup */
	hash_cd_ctrl->hash_cfg_offset = 0;
	hash_cd_ctrl->hash_flags = ICP_QAT_FW_AUTH_HDR_FLAG_NO_NESTED;
	hash_cd_ctrl->inner_res_sz = digestsize;
	hash_cd_ctrl->final_sz = digestsize;

	switch (ctx->qat_hash_alg) {
	case ICP_QAT_HW_AUTH_ALGO_SHA1:
		hash_cd_ctrl->inner_state1_sz =
			round_up(ICP_QAT_HW_SHA1_STATE1_SZ, 8);
		hash_cd_ctrl->inner_state2_sz =
			round_up(ICP_QAT_HW_SHA1_STATE2_SZ, 8);
		break;
	case ICP_QAT_HW_AUTH_ALGO_SHA256:
		hash_cd_ctrl->inner_state1_sz = ICP_QAT_HW_SHA256_STATE1_SZ;
		hash_cd_ctrl->inner_state2_sz = ICP_QAT_HW_SHA256_STATE2_SZ;
		break;
	case ICP_QAT_HW_AUTH_ALGO_SHA512:
		hash_cd_ctrl->inner_state1_sz = ICP_QAT_HW_SHA512_STATE1_SZ;
		hash_cd_ctrl->inner_state2_sz = ICP_QAT_HW_SHA512_STATE2_SZ;
		break;
	default:
		break;
	}

	hash_cd_ctrl->inner_state2_offset = hash_cd_ctrl->hash_cfg_offset +
			((sizeof(struct icp_qat_hw_auth_setup) +
			 round_up(hash_cd_ctrl->inner_state1_sz, 8)) >> 3);
	auth_param->auth_res_sz = digestsize;
	ICP_QAT_FW_COMN_CURR_ID_SET(hash_cd_ctrl, ICP_QAT_FW_SLICE_AUTH);
	ICP_QAT_FW_COMN_NEXT_ID_SET(hash_cd_ctrl, ICP_QAT_FW_SLICE_CIPHER);
	return 0;
}

static void qat_alg_skcipher_init_com(struct qat_alg_skcipher_ctx *ctx,
				      struct icp_qat_fw_la_bulk_req *req,
				      struct icp_qat_hw_cipher_algo_blk *cd,
				      const u8 *key, unsigned int keylen)
{
	struct icp_qat_fw_comn_req_hdr_cd_pars *cd_pars = &req->cd_pars;
	struct icp_qat_fw_comn_req_hdr *header = &req->comn_hdr;
	struct icp_qat_fw_cipher_cd_ctrl_hdr *cd_ctrl = (void *)&req->cd_ctrl;
	bool aes_v2_capable = HW_CAP_AES_V2(ctx->inst->accel_dev);
	int mode = ctx->mode;

	qat_alg_init_common_hdr(header);
	header->service_cmd_id = ICP_QAT_FW_LA_CMD_CIPHER;
	cd_pars->u.s.content_desc_params_sz =
				sizeof(struct icp_qat_hw_cipher_algo_blk) >> 3;

	if (aes_v2_capable && mode == ICP_QAT_HW_CIPHER_XTS_MODE) {
		ICP_QAT_FW_LA_SLICE_TYPE_SET(header->serv_specif_flags,
					     ICP_QAT_FW_LA_USE_UCS_SLICE_TYPE);

		/* Store both XTS keys in CD, only the first key is sent
		 * to the HW, the second key is used for tweak calculation
		 */
		memcpy(cd->ucs_aes.key, key, keylen);
		keylen = keylen / 2;
	} else if (aes_v2_capable && mode == ICP_QAT_HW_CIPHER_CTR_MODE) {
		ICP_QAT_FW_LA_SLICE_TYPE_SET(header->serv_specif_flags,
					     ICP_QAT_FW_LA_USE_UCS_SLICE_TYPE);
		memcpy(cd->ucs_aes.key, key, keylen);
		keylen = round_up(keylen, 16);
	} else {
		memcpy(cd->aes.key, key, keylen);
	}

	/* Cipher CD config setup */
	cd_ctrl->cipher_key_sz = keylen >> 3;
	cd_ctrl->cipher_state_sz = AES_BLOCK_SIZE >> 3;
	cd_ctrl->cipher_cfg_offset = 0;
	ICP_QAT_FW_COMN_CURR_ID_SET(cd_ctrl, ICP_QAT_FW_SLICE_CIPHER);
	ICP_QAT_FW_COMN_NEXT_ID_SET(cd_ctrl, ICP_QAT_FW_SLICE_DRAM_WR);
}

static void qat_alg_skcipher_init_enc(struct qat_alg_skcipher_ctx *ctx,
				      int alg, const u8 *key,
				      unsigned int keylen, int mode)
{
	struct icp_qat_hw_cipher_algo_blk *enc_cd = ctx->enc_cd;
	struct icp_qat_fw_la_bulk_req *req = &ctx->enc_fw_req;
	struct icp_qat_fw_comn_req_hdr_cd_pars *cd_pars = &req->cd_pars;

	qat_alg_skcipher_init_com(ctx, req, enc_cd, key, keylen);
	cd_pars->u.s.content_desc_addr = ctx->enc_cd_paddr;
	enc_cd->aes.cipher_config.val = QAT_AES_HW_CONFIG_ENC(alg, mode);
}

static void qat_alg_xts_reverse_key(const u8 *key_forward, unsigned int keylen,
				    u8 *key_reverse)
{
	struct crypto_aes_ctx aes_expanded;
	int nrounds;
	u8 *key;

	aes_expandkey(&aes_expanded, key_forward, keylen);
	if (keylen == AES_KEYSIZE_128) {
		nrounds = 10;
		key = (u8 *)aes_expanded.key_enc + (AES_BLOCK_SIZE * nrounds);
		memcpy(key_reverse, key, AES_BLOCK_SIZE);
	} else {
		/* AES_KEYSIZE_256 */
		nrounds = 14;
		key = (u8 *)aes_expanded.key_enc + (AES_BLOCK_SIZE * nrounds);
		memcpy(key_reverse, key, AES_BLOCK_SIZE);
		memcpy(key_reverse + AES_BLOCK_SIZE, key - AES_BLOCK_SIZE,
		       AES_BLOCK_SIZE);
	}
}

static void qat_alg_skcipher_init_dec(struct qat_alg_skcipher_ctx *ctx,
				      int alg, const u8 *key,
				      unsigned int keylen, int mode)
{
	struct icp_qat_hw_cipher_algo_blk *dec_cd = ctx->dec_cd;
	struct icp_qat_fw_la_bulk_req *req = &ctx->dec_fw_req;
	struct icp_qat_fw_comn_req_hdr_cd_pars *cd_pars = &req->cd_pars;
	bool aes_v2_capable = HW_CAP_AES_V2(ctx->inst->accel_dev);

	qat_alg_skcipher_init_com(ctx, req, dec_cd, key, keylen);
	cd_pars->u.s.content_desc_addr = ctx->dec_cd_paddr;

	if (aes_v2_capable && mode == ICP_QAT_HW_CIPHER_XTS_MODE) {
		/* Key reversing not supported, set no convert */
		dec_cd->aes.cipher_config.val =
				QAT_AES_HW_CONFIG_DEC_NO_CONV(alg, mode);

		/* In-place key reversal */
		qat_alg_xts_reverse_key(dec_cd->ucs_aes.key, keylen / 2,
					dec_cd->ucs_aes.key);
	} else if (mode != ICP_QAT_HW_CIPHER_CTR_MODE) {
		dec_cd->aes.cipher_config.val =
					QAT_AES_HW_CONFIG_DEC(alg, mode);
	} else {
		dec_cd->aes.cipher_config.val =
					QAT_AES_HW_CONFIG_ENC(alg, mode);
	}
}

static int qat_alg_validate_key(int key_len, int *alg, int mode)
{
	if (mode != ICP_QAT_HW_CIPHER_XTS_MODE) {
		switch (key_len) {
		case AES_KEYSIZE_128:
			*alg = ICP_QAT_HW_CIPHER_ALGO_AES128;
			break;
		case AES_KEYSIZE_192:
			*alg = ICP_QAT_HW_CIPHER_ALGO_AES192;
			break;
		case AES_KEYSIZE_256:
			*alg = ICP_QAT_HW_CIPHER_ALGO_AES256;
			break;
		default:
			return -EINVAL;
		}
	} else {
		switch (key_len) {
		case AES_KEYSIZE_128 << 1:
			*alg = ICP_QAT_HW_CIPHER_ALGO_AES128;
			break;
		case AES_KEYSIZE_256 << 1:
			*alg = ICP_QAT_HW_CIPHER_ALGO_AES256;
			break;
		default:
			return -EINVAL;
		}
	}
	return 0;
}

static int qat_alg_aead_init_sessions(struct crypto_aead *tfm, const u8 *key,
				      unsigned int keylen,  int mode)
{
	struct crypto_authenc_keys keys;
	int alg;

	if (crypto_authenc_extractkeys(&keys, key, keylen))
		goto bad_key;

	if (qat_alg_validate_key(keys.enckeylen, &alg, mode))
		goto bad_key;

	if (qat_alg_aead_init_enc_session(tfm, alg, &keys, mode))
		goto error;

	if (qat_alg_aead_init_dec_session(tfm, alg, &keys, mode))
		goto error;

	memzero_explicit(&keys, sizeof(keys));
	return 0;
bad_key:
	memzero_explicit(&keys, sizeof(keys));
	return -EINVAL;
error:
	memzero_explicit(&keys, sizeof(keys));
	return -EFAULT;
}

static int qat_alg_skcipher_init_sessions(struct qat_alg_skcipher_ctx *ctx,
					  const u8 *key,
					  unsigned int keylen,
					  int mode)
{
	int alg;

	if (qat_alg_validate_key(keylen, &alg, mode))
		return -EINVAL;

	qat_alg_skcipher_init_enc(ctx, alg, key, keylen, mode);
	qat_alg_skcipher_init_dec(ctx, alg, key, keylen, mode);
	return 0;
}

static int qat_alg_aead_rekey(struct crypto_aead *tfm, const u8 *key,
			      unsigned int keylen)
{
	struct qat_alg_aead_ctx *ctx = crypto_aead_ctx(tfm);

	memset(ctx->enc_cd, 0, sizeof(*ctx->enc_cd));
	memset(ctx->dec_cd, 0, sizeof(*ctx->dec_cd));
	memset(&ctx->enc_fw_req, 0, sizeof(ctx->enc_fw_req));
	memset(&ctx->dec_fw_req, 0, sizeof(ctx->dec_fw_req));

	return qat_alg_aead_init_sessions(tfm, key, keylen,
					  ICP_QAT_HW_CIPHER_CBC_MODE);
}

static int qat_alg_aead_newkey(struct crypto_aead *tfm, const u8 *key,
			       unsigned int keylen)
{
	struct qat_alg_aead_ctx *ctx = crypto_aead_ctx(tfm);
	struct qat_crypto_instance *inst = NULL;
	int node = numa_node_id();
	struct device *dev;
	int ret;

	inst = qat_crypto_get_instance_node(node);
	if (!inst)
		return -EINVAL;
	dev = &GET_DEV(inst->accel_dev);
	ctx->inst = inst;
	ctx->enc_cd = dma_alloc_coherent(dev, sizeof(*ctx->enc_cd),
					 &ctx->enc_cd_paddr,
					 GFP_ATOMIC);
	if (!ctx->enc_cd) {
		ret = -ENOMEM;
		goto out_free_inst;
	}
	ctx->dec_cd = dma_alloc_coherent(dev, sizeof(*ctx->dec_cd),
					 &ctx->dec_cd_paddr,
					 GFP_ATOMIC);
	if (!ctx->dec_cd) {
		ret = -ENOMEM;
		goto out_free_enc;
	}

	ret = qat_alg_aead_init_sessions(tfm, key, keylen,
					 ICP_QAT_HW_CIPHER_CBC_MODE);
	if (ret)
		goto out_free_all;

	return 0;

out_free_all:
	memset(ctx->dec_cd, 0, sizeof(struct qat_alg_cd));
	dma_free_coherent(dev, sizeof(struct qat_alg_cd),
			  ctx->dec_cd, ctx->dec_cd_paddr);
	ctx->dec_cd = NULL;
out_free_enc:
	memset(ctx->enc_cd, 0, sizeof(struct qat_alg_cd));
	dma_free_coherent(dev, sizeof(struct qat_alg_cd),
			  ctx->enc_cd, ctx->enc_cd_paddr);
	ctx->enc_cd = NULL;
out_free_inst:
	ctx->inst = NULL;
	qat_crypto_put_instance(inst);
	return ret;
}

static int qat_alg_aead_setkey(struct crypto_aead *tfm, const u8 *key,
			       unsigned int keylen)
{
	struct qat_alg_aead_ctx *ctx = crypto_aead_ctx(tfm);

	if (ctx->enc_cd)
		return qat_alg_aead_rekey(tfm, key, keylen);
	else
		return qat_alg_aead_newkey(tfm, key, keylen);
}

static void qat_aead_alg_callback(struct icp_qat_fw_la_resp *qat_resp,
				  struct qat_crypto_request *qat_req)
{
	struct qat_alg_aead_ctx *ctx = qat_req->aead_ctx;
	struct qat_crypto_instance *inst = ctx->inst;
	struct aead_request *areq = qat_req->aead_req;
	u8 stat_filed = qat_resp->comn_resp.comn_status;
	int res = 0, qat_res = ICP_QAT_FW_COMN_RESP_CRYPTO_STAT_GET(stat_filed);

	qat_bl_free_bufl(inst->accel_dev, &qat_req->buf);
	if (unlikely(qat_res != ICP_QAT_FW_COMN_STATUS_FLAG_OK))
		res = -EBADMSG;
	aead_request_complete(areq, res);
}

static void qat_alg_update_iv_ctr_mode(struct qat_crypto_request *qat_req)
{
	struct skcipher_request *sreq = qat_req->skcipher_req;
	u64 iv_lo_prev;
	u64 iv_lo;
	u64 iv_hi;

	memcpy(qat_req->iv, sreq->iv, AES_BLOCK_SIZE);

	iv_lo = be64_to_cpu(qat_req->iv_lo);
	iv_hi = be64_to_cpu(qat_req->iv_hi);

	iv_lo_prev = iv_lo;
	iv_lo += DIV_ROUND_UP(sreq->cryptlen, AES_BLOCK_SIZE);
	if (iv_lo < iv_lo_prev)
		iv_hi++;

	qat_req->iv_lo = cpu_to_be64(iv_lo);
	qat_req->iv_hi = cpu_to_be64(iv_hi);
}

static void qat_alg_update_iv_cbc_mode(struct qat_crypto_request *qat_req)
{
	struct skcipher_request *sreq = qat_req->skcipher_req;
	int offset = sreq->cryptlen - AES_BLOCK_SIZE;
	struct scatterlist *sgl;

	if (qat_req->encryption)
		sgl = sreq->dst;
	else
		sgl = sreq->src;

	scatterwalk_map_and_copy(qat_req->iv, sgl, offset, AES_BLOCK_SIZE, 0);
}

static void qat_alg_update_iv(struct qat_crypto_request *qat_req)
{
	struct qat_alg_skcipher_ctx *ctx = qat_req->skcipher_ctx;
	struct device *dev = &GET_DEV(ctx->inst->accel_dev);

	switch (ctx->mode) {
	case ICP_QAT_HW_CIPHER_CTR_MODE:
		qat_alg_update_iv_ctr_mode(qat_req);
		break;
	case ICP_QAT_HW_CIPHER_CBC_MODE:
		qat_alg_update_iv_cbc_mode(qat_req);
		break;
	case ICP_QAT_HW_CIPHER_XTS_MODE:
		break;
	default:
		dev_warn(dev, "Unsupported IV update for cipher mode %d\n",
			 ctx->mode);
	}
}

static void qat_skcipher_alg_callback(struct icp_qat_fw_la_resp *qat_resp,
				      struct qat_crypto_request *qat_req)
{
	struct qat_alg_skcipher_ctx *ctx = qat_req->skcipher_ctx;
	struct qat_crypto_instance *inst = ctx->inst;
	struct skcipher_request *sreq = qat_req->skcipher_req;
	u8 stat_filed = qat_resp->comn_resp.comn_status;
	int res = 0, qat_res = ICP_QAT_FW_COMN_RESP_CRYPTO_STAT_GET(stat_filed);

	qat_bl_free_bufl(inst->accel_dev, &qat_req->buf);
	if (unlikely(qat_res != ICP_QAT_FW_COMN_STATUS_FLAG_OK))
		res = -EINVAL;

	if (qat_req->encryption)
		qat_alg_update_iv(qat_req);

	memcpy(sreq->iv, qat_req->iv, AES_BLOCK_SIZE);

	skcipher_request_complete(sreq, res);
}

void qat_alg_callback(void *resp)
{
	struct icp_qat_fw_la_resp *qat_resp = resp;
	struct qat_crypto_request *qat_req =
				(void *)(__force long)qat_resp->opaque_data;
	struct qat_instance_backlog *backlog = qat_req->alg_req.backlog;

	qat_req->cb(qat_resp, qat_req);

	qat_alg_send_backlog(backlog);
}

static int qat_alg_send_sym_message(struct qat_crypto_request *qat_req,
				    struct qat_crypto_instance *inst,
				    struct crypto_async_request *base)
{
	struct qat_alg_req *alg_req = &qat_req->alg_req;

	alg_req->fw_req = (u32 *)&qat_req->req;
	alg_req->tx_ring = inst->sym_tx;
	alg_req->base = base;
	alg_req->backlog = &inst->backlog;

	return qat_alg_send_message(alg_req);
}

static int qat_alg_aead_dec(struct aead_request *areq)
{
	struct crypto_aead *aead_tfm = crypto_aead_reqtfm(areq);
	struct crypto_tfm *tfm = crypto_aead_tfm(aead_tfm);
	struct qat_alg_aead_ctx *ctx = crypto_tfm_ctx(tfm);
	struct qat_crypto_request *qat_req = aead_request_ctx(areq);
	struct icp_qat_fw_la_cipher_req_params *cipher_param;
	struct icp_qat_fw_la_auth_req_params *auth_param;
	struct icp_qat_fw_la_bulk_req *msg;
	int digst_size = crypto_aead_authsize(aead_tfm);
	gfp_t f = qat_algs_alloc_flags(&areq->base);
	int ret;
	u32 cipher_len;

	cipher_len = areq->cryptlen - digst_size;
	if (cipher_len % AES_BLOCK_SIZE != 0)
		return -EINVAL;

	ret = qat_bl_sgl_to_bufl(ctx->inst->accel_dev, areq->src, areq->dst,
				 &qat_req->buf, NULL, f);
	if (unlikely(ret))
		return ret;

	msg = &qat_req->req;
	*msg = ctx->dec_fw_req;
	qat_req->aead_ctx = ctx;
	qat_req->aead_req = areq;
	qat_req->cb = qat_aead_alg_callback;
	qat_req->req.comn_mid.opaque_data = (u64)(__force long)qat_req;
	qat_req->req.comn_mid.src_data_addr = qat_req->buf.blp;
	qat_req->req.comn_mid.dest_data_addr = qat_req->buf.bloutp;
	cipher_param = (void *)&qat_req->req.serv_specif_rqpars;
	cipher_param->cipher_length = cipher_len;
	cipher_param->cipher_offset = areq->assoclen;
	memcpy(cipher_param->u.cipher_IV_array, areq->iv, AES_BLOCK_SIZE);
	auth_param = (void *)((u8 *)cipher_param + sizeof(*cipher_param));
	auth_param->auth_off = 0;
	auth_param->auth_len = areq->assoclen + cipher_param->cipher_length;

	ret = qat_alg_send_sym_message(qat_req, ctx->inst, &areq->base);
	if (ret == -ENOSPC)
		qat_bl_free_bufl(ctx->inst->accel_dev, &qat_req->buf);

	return ret;
}

static int qat_alg_aead_enc(struct aead_request *areq)
{
	struct crypto_aead *aead_tfm = crypto_aead_reqtfm(areq);
	struct crypto_tfm *tfm = crypto_aead_tfm(aead_tfm);
	struct qat_alg_aead_ctx *ctx = crypto_tfm_ctx(tfm);
	struct qat_crypto_request *qat_req = aead_request_ctx(areq);
	struct icp_qat_fw_la_cipher_req_params *cipher_param;
	struct icp_qat_fw_la_auth_req_params *auth_param;
	gfp_t f = qat_algs_alloc_flags(&areq->base);
	struct icp_qat_fw_la_bulk_req *msg;
	u8 *iv = areq->iv;
	int ret;

	if (areq->cryptlen % AES_BLOCK_SIZE != 0)
		return -EINVAL;

	ret = qat_bl_sgl_to_bufl(ctx->inst->accel_dev, areq->src, areq->dst,
				 &qat_req->buf, NULL, f);
	if (unlikely(ret))
		return ret;

	msg = &qat_req->req;
	*msg = ctx->enc_fw_req;
	qat_req->aead_ctx = ctx;
	qat_req->aead_req = areq;
	qat_req->cb = qat_aead_alg_callback;
	qat_req->req.comn_mid.opaque_data = (u64)(__force long)qat_req;
	qat_req->req.comn_mid.src_data_addr = qat_req->buf.blp;
	qat_req->req.comn_mid.dest_data_addr = qat_req->buf.bloutp;
	cipher_param = (void *)&qat_req->req.serv_specif_rqpars;
	auth_param = (void *)((u8 *)cipher_param + sizeof(*cipher_param));

	memcpy(cipher_param->u.cipher_IV_array, iv, AES_BLOCK_SIZE);
	cipher_param->cipher_length = areq->cryptlen;
	cipher_param->cipher_offset = areq->assoclen;

	auth_param->auth_off = 0;
	auth_param->auth_len = areq->assoclen + areq->cryptlen;

	ret = qat_alg_send_sym_message(qat_req, ctx->inst, &areq->base);
	if (ret == -ENOSPC)
		qat_bl_free_bufl(ctx->inst->accel_dev, &qat_req->buf);

	return ret;
}

static int qat_alg_skcipher_rekey(struct qat_alg_skcipher_ctx *ctx,
				  const u8 *key, unsigned int keylen,
				  int mode)
{
	memset(ctx->enc_cd, 0, sizeof(*ctx->enc_cd));
	memset(ctx->dec_cd, 0, sizeof(*ctx->dec_cd));
	memset(&ctx->enc_fw_req, 0, sizeof(ctx->enc_fw_req));
	memset(&ctx->dec_fw_req, 0, sizeof(ctx->dec_fw_req));

	return qat_alg_skcipher_init_sessions(ctx, key, keylen, mode);
}

static int qat_alg_skcipher_newkey(struct qat_alg_skcipher_ctx *ctx,
				   const u8 *key, unsigned int keylen,
				   int mode)
{
	struct qat_crypto_instance *inst = NULL;
	struct device *dev;
	int node = numa_node_id();
	int ret;

	inst = qat_crypto_get_instance_node(node);
	if (!inst)
		return -EINVAL;
	dev = &GET_DEV(inst->accel_dev);
	ctx->inst = inst;
	ctx->enc_cd = dma_alloc_coherent(dev, sizeof(*ctx->enc_cd),
					 &ctx->enc_cd_paddr,
					 GFP_ATOMIC);
	if (!ctx->enc_cd) {
		ret = -ENOMEM;
		goto out_free_instance;
	}
	ctx->dec_cd = dma_alloc_coherent(dev, sizeof(*ctx->dec_cd),
					 &ctx->dec_cd_paddr,
					 GFP_ATOMIC);
	if (!ctx->dec_cd) {
		ret = -ENOMEM;
		goto out_free_enc;
	}

	ret = qat_alg_skcipher_init_sessions(ctx, key, keylen, mode);
	if (ret)
		goto out_free_all;

	return 0;

out_free_all:
	memset(ctx->dec_cd, 0, sizeof(*ctx->dec_cd));
	dma_free_coherent(dev, sizeof(*ctx->dec_cd),
			  ctx->dec_cd, ctx->dec_cd_paddr);
	ctx->dec_cd = NULL;
out_free_enc:
	memset(ctx->enc_cd, 0, sizeof(*ctx->enc_cd));
	dma_free_coherent(dev, sizeof(*ctx->enc_cd),
			  ctx->enc_cd, ctx->enc_cd_paddr);
	ctx->enc_cd = NULL;
out_free_instance:
	ctx->inst = NULL;
	qat_crypto_put_instance(inst);
	return ret;
}

static int qat_alg_skcipher_setkey(struct crypto_skcipher *tfm,
				   const u8 *key, unsigned int keylen,
				   int mode)
{
	struct qat_alg_skcipher_ctx *ctx = crypto_skcipher_ctx(tfm);

	ctx->mode = mode;

	if (ctx->enc_cd)
		return qat_alg_skcipher_rekey(ctx, key, keylen, mode);
	else
		return qat_alg_skcipher_newkey(ctx, key, keylen, mode);
}

static int qat_alg_skcipher_cbc_setkey(struct crypto_skcipher *tfm,
				       const u8 *key, unsigned int keylen)
{
	return qat_alg_skcipher_setkey(tfm, key, keylen,
				       ICP_QAT_HW_CIPHER_CBC_MODE);
}

static int qat_alg_skcipher_ctr_setkey(struct crypto_skcipher *tfm,
				       const u8 *key, unsigned int keylen)
{
	return qat_alg_skcipher_setkey(tfm, key, keylen,
				       ICP_QAT_HW_CIPHER_CTR_MODE);
}

static int qat_alg_skcipher_xts_setkey(struct crypto_skcipher *tfm,
				       const u8 *key, unsigned int keylen)
{
	struct qat_alg_skcipher_ctx *ctx = crypto_skcipher_ctx(tfm);
	int ret;

	ret = xts_verify_key(tfm, key, keylen);
	if (ret)
		return ret;

	if (keylen >> 1 == AES_KEYSIZE_192) {
		ret = crypto_skcipher_setkey(ctx->ftfm, key, keylen);
		if (ret)
			return ret;

		ctx->fallback = true;

		return 0;
	}

	ctx->fallback = false;

	ret = qat_alg_skcipher_setkey(tfm, key, keylen,
				      ICP_QAT_HW_CIPHER_XTS_MODE);
	if (ret)
		return ret;

	if (HW_CAP_AES_V2(ctx->inst->accel_dev))
		ret = crypto_cipher_setkey(ctx->tweak, key + (keylen / 2),
					   keylen / 2);

	return ret;
}

static void qat_alg_set_req_iv(struct qat_crypto_request *qat_req)
{
	struct icp_qat_fw_la_cipher_req_params *cipher_param;
	struct qat_alg_skcipher_ctx *ctx = qat_req->skcipher_ctx;
	bool aes_v2_capable = HW_CAP_AES_V2(ctx->inst->accel_dev);
	u8 *iv = qat_req->skcipher_req->iv;

	cipher_param = (void *)&qat_req->req.serv_specif_rqpars;

	if (aes_v2_capable && ctx->mode == ICP_QAT_HW_CIPHER_XTS_MODE)
		crypto_cipher_encrypt_one(ctx->tweak,
					  (u8 *)cipher_param->u.cipher_IV_array,
					  iv);
	else
		memcpy(cipher_param->u.cipher_IV_array, iv, AES_BLOCK_SIZE);
}

static int qat_alg_skcipher_encrypt(struct skcipher_request *req)
{
	struct crypto_skcipher *stfm = crypto_skcipher_reqtfm(req);
	struct crypto_tfm *tfm = crypto_skcipher_tfm(stfm);
	struct qat_alg_skcipher_ctx *ctx = crypto_tfm_ctx(tfm);
	struct qat_crypto_request *qat_req = skcipher_request_ctx(req);
	struct icp_qat_fw_la_cipher_req_params *cipher_param;
	gfp_t f = qat_algs_alloc_flags(&req->base);
	struct icp_qat_fw_la_bulk_req *msg;
	int ret;

	if (req->cryptlen == 0)
		return 0;

	ret = qat_bl_sgl_to_bufl(ctx->inst->accel_dev, req->src, req->dst,
				 &qat_req->buf, NULL, f);
	if (unlikely(ret))
		return ret;

	msg = &qat_req->req;
	*msg = ctx->enc_fw_req;
	qat_req->skcipher_ctx = ctx;
	qat_req->skcipher_req = req;
	qat_req->cb = qat_skcipher_alg_callback;
	qat_req->req.comn_mid.opaque_data = (u64)(__force long)qat_req;
	qat_req->req.comn_mid.src_data_addr = qat_req->buf.blp;
	qat_req->req.comn_mid.dest_data_addr = qat_req->buf.bloutp;
	qat_req->encryption = true;
	cipher_param = (void *)&qat_req->req.serv_specif_rqpars;
	cipher_param->cipher_length = req->cryptlen;
	cipher_param->cipher_offset = 0;

	qat_alg_set_req_iv(qat_req);

	ret = qat_alg_send_sym_message(qat_req, ctx->inst, &req->base);
	if (ret == -ENOSPC)
		qat_bl_free_bufl(ctx->inst->accel_dev, &qat_req->buf);

	return ret;
}

static int qat_alg_skcipher_blk_encrypt(struct skcipher_request *req)
{
	if (req->cryptlen % AES_BLOCK_SIZE != 0)
		return -EINVAL;

	return qat_alg_skcipher_encrypt(req);
}

static int qat_alg_skcipher_xts_encrypt(struct skcipher_request *req)
{
	struct crypto_skcipher *stfm = crypto_skcipher_reqtfm(req);
	struct qat_alg_skcipher_ctx *ctx = crypto_skcipher_ctx(stfm);
	struct skcipher_request *nreq = skcipher_request_ctx(req);

	if (req->cryptlen < XTS_BLOCK_SIZE)
		return -EINVAL;

	if (ctx->fallback) {
		memcpy(nreq, req, sizeof(*req));
		skcipher_request_set_tfm(nreq, ctx->ftfm);
		return crypto_skcipher_encrypt(nreq);
	}

	return qat_alg_skcipher_encrypt(req);
}

static int qat_alg_skcipher_decrypt(struct skcipher_request *req)
{
	struct crypto_skcipher *stfm = crypto_skcipher_reqtfm(req);
	struct crypto_tfm *tfm = crypto_skcipher_tfm(stfm);
	struct qat_alg_skcipher_ctx *ctx = crypto_tfm_ctx(tfm);
	struct qat_crypto_request *qat_req = skcipher_request_ctx(req);
	struct icp_qat_fw_la_cipher_req_params *cipher_param;
	gfp_t f = qat_algs_alloc_flags(&req->base);
	struct icp_qat_fw_la_bulk_req *msg;
	int ret;

	if (req->cryptlen == 0)
		return 0;

	ret = qat_bl_sgl_to_bufl(ctx->inst->accel_dev, req->src, req->dst,
				 &qat_req->buf, NULL, f);
	if (unlikely(ret))
		return ret;

	msg = &qat_req->req;
	*msg = ctx->dec_fw_req;
	qat_req->skcipher_ctx = ctx;
	qat_req->skcipher_req = req;
	qat_req->cb = qat_skcipher_alg_callback;
	qat_req->req.comn_mid.opaque_data = (u64)(__force long)qat_req;
	qat_req->req.comn_mid.src_data_addr = qat_req->buf.blp;
	qat_req->req.comn_mid.dest_data_addr = qat_req->buf.bloutp;
	qat_req->encryption = false;
	cipher_param = (void *)&qat_req->req.serv_specif_rqpars;
	cipher_param->cipher_length = req->cryptlen;
	cipher_param->cipher_offset = 0;

	qat_alg_set_req_iv(qat_req);
	qat_alg_update_iv(qat_req);

	ret = qat_alg_send_sym_message(qat_req, ctx->inst, &req->base);
	if (ret == -ENOSPC)
		qat_bl_free_bufl(ctx->inst->accel_dev, &qat_req->buf);

	return ret;
}

static int qat_alg_skcipher_blk_decrypt(struct skcipher_request *req)
{
	if (req->cryptlen % AES_BLOCK_SIZE != 0)
		return -EINVAL;

	return qat_alg_skcipher_decrypt(req);
}

static int qat_alg_skcipher_xts_decrypt(struct skcipher_request *req)
{
	struct crypto_skcipher *stfm = crypto_skcipher_reqtfm(req);
	struct qat_alg_skcipher_ctx *ctx = crypto_skcipher_ctx(stfm);
	struct skcipher_request *nreq = skcipher_request_ctx(req);

	if (req->cryptlen < XTS_BLOCK_SIZE)
		return -EINVAL;

	if (ctx->fallback) {
		memcpy(nreq, req, sizeof(*req));
		skcipher_request_set_tfm(nreq, ctx->ftfm);
		return crypto_skcipher_decrypt(nreq);
	}

	return qat_alg_skcipher_decrypt(req);
}

static int qat_alg_aead_init(struct crypto_aead *tfm,
			     enum icp_qat_hw_auth_algo hash,
			     const char *hash_name)
{
	struct qat_alg_aead_ctx *ctx = crypto_aead_ctx(tfm);

	ctx->hash_tfm = crypto_alloc_shash(hash_name, 0, 0);
	if (IS_ERR(ctx->hash_tfm))
		return PTR_ERR(ctx->hash_tfm);
	ctx->qat_hash_alg = hash;
	crypto_aead_set_reqsize(tfm, sizeof(struct qat_crypto_request));
	return 0;
}

static int qat_alg_aead_sha1_init(struct crypto_aead *tfm)
{
	return qat_alg_aead_init(tfm, ICP_QAT_HW_AUTH_ALGO_SHA1, "sha1");
}

static int qat_alg_aead_sha256_init(struct crypto_aead *tfm)
{
	return qat_alg_aead_init(tfm, ICP_QAT_HW_AUTH_ALGO_SHA256, "sha256");
}

static int qat_alg_aead_sha512_init(struct crypto_aead *tfm)
{
	return qat_alg_aead_init(tfm, ICP_QAT_HW_AUTH_ALGO_SHA512, "sha512");
}

static void qat_alg_aead_exit(struct crypto_aead *tfm)
{
	struct qat_alg_aead_ctx *ctx = crypto_aead_ctx(tfm);
	struct qat_crypto_instance *inst = ctx->inst;
	struct device *dev;

	crypto_free_shash(ctx->hash_tfm);

	if (!inst)
		return;

	dev = &GET_DEV(inst->accel_dev);
	if (ctx->enc_cd) {
		memset(ctx->enc_cd, 0, sizeof(struct qat_alg_cd));
		dma_free_coherent(dev, sizeof(struct qat_alg_cd),
				  ctx->enc_cd, ctx->enc_cd_paddr);
	}
	if (ctx->dec_cd) {
		memset(ctx->dec_cd, 0, sizeof(struct qat_alg_cd));
		dma_free_coherent(dev, sizeof(struct qat_alg_cd),
				  ctx->dec_cd, ctx->dec_cd_paddr);
	}
	qat_crypto_put_instance(inst);
}

static int qat_alg_skcipher_init_tfm(struct crypto_skcipher *tfm)
{
	crypto_skcipher_set_reqsize(tfm, sizeof(struct qat_crypto_request));
	return 0;
}

static int qat_alg_skcipher_init_xts_tfm(struct crypto_skcipher *tfm)
{
	struct qat_alg_skcipher_ctx *ctx = crypto_skcipher_ctx(tfm);
	int reqsize;

	ctx->ftfm = crypto_alloc_skcipher("xts(aes)", 0,
					  CRYPTO_ALG_NEED_FALLBACK);
	if (IS_ERR(ctx->ftfm))
		return PTR_ERR(ctx->ftfm);

	ctx->tweak = crypto_alloc_cipher("aes", 0, 0);
	if (IS_ERR(ctx->tweak)) {
		crypto_free_skcipher(ctx->ftfm);
		return PTR_ERR(ctx->tweak);
	}

	reqsize = max(sizeof(struct qat_crypto_request),
		      sizeof(struct skcipher_request) +
		      crypto_skcipher_reqsize(ctx->ftfm));
	crypto_skcipher_set_reqsize(tfm, reqsize);

	return 0;
}

static void qat_alg_skcipher_exit_tfm(struct crypto_skcipher *tfm)
{
	struct qat_alg_skcipher_ctx *ctx = crypto_skcipher_ctx(tfm);
	struct qat_crypto_instance *inst = ctx->inst;
	struct device *dev;

	if (!inst)
		return;

	dev = &GET_DEV(inst->accel_dev);
	if (ctx->enc_cd) {
		memset(ctx->enc_cd, 0,
		       sizeof(struct icp_qat_hw_cipher_algo_blk));
		dma_free_coherent(dev,
				  sizeof(struct icp_qat_hw_cipher_algo_blk),
				  ctx->enc_cd, ctx->enc_cd_paddr);
	}
	if (ctx->dec_cd) {
		memset(ctx->dec_cd, 0,
		       sizeof(struct icp_qat_hw_cipher_algo_blk));
		dma_free_coherent(dev,
				  sizeof(struct icp_qat_hw_cipher_algo_blk),
				  ctx->dec_cd, ctx->dec_cd_paddr);
	}
	qat_crypto_put_instance(inst);
}

static void qat_alg_skcipher_exit_xts_tfm(struct crypto_skcipher *tfm)
{
	struct qat_alg_skcipher_ctx *ctx = crypto_skcipher_ctx(tfm);

	if (ctx->ftfm)
		crypto_free_skcipher(ctx->ftfm);

	if (ctx->tweak)
		crypto_free_cipher(ctx->tweak);

	qat_alg_skcipher_exit_tfm(tfm);
}

static struct aead_alg qat_aeads[] = { {
	.base = {
		.cra_name = "authenc(hmac(sha1),cbc(aes))",
		.cra_driver_name = "qat_aes_cbc_hmac_sha1",
		.cra_priority = 4001,
		.cra_flags = CRYPTO_ALG_ASYNC | CRYPTO_ALG_ALLOCATES_MEMORY,
		.cra_blocksize = AES_BLOCK_SIZE,
		.cra_ctxsize = sizeof(struct qat_alg_aead_ctx),
		.cra_module = THIS_MODULE,
	},
	.init = qat_alg_aead_sha1_init,
	.exit = qat_alg_aead_exit,
	.setkey = qat_alg_aead_setkey,
	.decrypt = qat_alg_aead_dec,
	.encrypt = qat_alg_aead_enc,
	.ivsize = AES_BLOCK_SIZE,
	.maxauthsize = SHA1_DIGEST_SIZE,
}, {
	.base = {
		.cra_name = "authenc(hmac(sha256),cbc(aes))",
		.cra_driver_name = "qat_aes_cbc_hmac_sha256",
		.cra_priority = 4001,
		.cra_flags = CRYPTO_ALG_ASYNC | CRYPTO_ALG_ALLOCATES_MEMORY,
		.cra_blocksize = AES_BLOCK_SIZE,
		.cra_ctxsize = sizeof(struct qat_alg_aead_ctx),
		.cra_module = THIS_MODULE,
	},
	.init = qat_alg_aead_sha256_init,
	.exit = qat_alg_aead_exit,
	.setkey = qat_alg_aead_setkey,
	.decrypt = qat_alg_aead_dec,
	.encrypt = qat_alg_aead_enc,
	.ivsize = AES_BLOCK_SIZE,
	.maxauthsize = SHA256_DIGEST_SIZE,
}, {
	.base = {
		.cra_name = "authenc(hmac(sha512),cbc(aes))",
		.cra_driver_name = "qat_aes_cbc_hmac_sha512",
		.cra_priority = 4001,
		.cra_flags = CRYPTO_ALG_ASYNC | CRYPTO_ALG_ALLOCATES_MEMORY,
		.cra_blocksize = AES_BLOCK_SIZE,
		.cra_ctxsize = sizeof(struct qat_alg_aead_ctx),
		.cra_module = THIS_MODULE,
	},
	.init = qat_alg_aead_sha512_init,
	.exit = qat_alg_aead_exit,
	.setkey = qat_alg_aead_setkey,
	.decrypt = qat_alg_aead_dec,
	.encrypt = qat_alg_aead_enc,
	.ivsize = AES_BLOCK_SIZE,
	.maxauthsize = SHA512_DIGEST_SIZE,
} };

static struct skcipher_alg qat_skciphers[] = { {
	.base.cra_name = "cbc(aes)",
	.base.cra_driver_name = "qat_aes_cbc",
	.base.cra_priority = 4001,
	.base.cra_flags = CRYPTO_ALG_ASYNC | CRYPTO_ALG_ALLOCATES_MEMORY,
	.base.cra_blocksize = AES_BLOCK_SIZE,
	.base.cra_ctxsize = sizeof(struct qat_alg_skcipher_ctx),
	.base.cra_alignmask = 0,
	.base.cra_module = THIS_MODULE,

	.init = qat_alg_skcipher_init_tfm,
	.exit = qat_alg_skcipher_exit_tfm,
	.setkey = qat_alg_skcipher_cbc_setkey,
	.decrypt = qat_alg_skcipher_blk_decrypt,
	.encrypt = qat_alg_skcipher_blk_encrypt,
	.min_keysize = AES_MIN_KEY_SIZE,
	.max_keysize = AES_MAX_KEY_SIZE,
	.ivsize = AES_BLOCK_SIZE,
}, {
	.base.cra_name = "ctr(aes)",
	.base.cra_driver_name = "qat_aes_ctr",
	.base.cra_priority = 4001,
	.base.cra_flags = CRYPTO_ALG_ASYNC | CRYPTO_ALG_ALLOCATES_MEMORY,
	.base.cra_blocksize = 1,
	.base.cra_ctxsize = sizeof(struct qat_alg_skcipher_ctx),
	.base.cra_alignmask = 0,
	.base.cra_module = THIS_MODULE,

	.init = qat_alg_skcipher_init_tfm,
	.exit = qat_alg_skcipher_exit_tfm,
	.setkey = qat_alg_skcipher_ctr_setkey,
	.decrypt = qat_alg_skcipher_decrypt,
	.encrypt = qat_alg_skcipher_encrypt,
	.min_keysize = AES_MIN_KEY_SIZE,
	.max_keysize = AES_MAX_KEY_SIZE,
	.ivsize = AES_BLOCK_SIZE,
}, {
	.base.cra_name = "xts(aes)",
	.base.cra_driver_name = "qat_aes_xts",
	.base.cra_priority = 4001,
	.base.cra_flags = CRYPTO_ALG_ASYNC | CRYPTO_ALG_NEED_FALLBACK |
			  CRYPTO_ALG_ALLOCATES_MEMORY,
	.base.cra_blocksize = AES_BLOCK_SIZE,
	.base.cra_ctxsize = sizeof(struct qat_alg_skcipher_ctx),
	.base.cra_alignmask = 0,
	.base.cra_module = THIS_MODULE,

	.init = qat_alg_skcipher_init_xts_tfm,
	.exit = qat_alg_skcipher_exit_xts_tfm,
	.setkey = qat_alg_skcipher_xts_setkey,
	.decrypt = qat_alg_skcipher_xts_decrypt,
	.encrypt = qat_alg_skcipher_xts_encrypt,
	.min_keysize = 2 * AES_MIN_KEY_SIZE,
	.max_keysize = 2 * AES_MAX_KEY_SIZE,
	.ivsize = AES_BLOCK_SIZE,
} };

int qat_algs_register(void)
{
	int ret = 0;

	mutex_lock(&algs_lock);
	if (++active_devs != 1)
		goto unlock;

	ret = crypto_register_skciphers(qat_skciphers,
					ARRAY_SIZE(qat_skciphers));
	if (ret)
		goto unlock;

	ret = crypto_register_aeads(qat_aeads, ARRAY_SIZE(qat_aeads));
	if (ret)
		goto unreg_algs;

unlock:
	mutex_unlock(&algs_lock);
	return ret;

unreg_algs:
	crypto_unregister_skciphers(qat_skciphers, ARRAY_SIZE(qat_skciphers));
	goto unlock;
}

void qat_algs_unregister(void)
{
	mutex_lock(&algs_lock);
	if (--active_devs != 0)
		goto unlock;

	crypto_unregister_aeads(qat_aeads, ARRAY_SIZE(qat_aeads));
	crypto_unregister_skciphers(qat_skciphers, ARRAY_SIZE(qat_skciphers));

unlock:
	mutex_unlock(&algs_lock);
}