numam-dpdk/lib/librte_cryptodev/rte_cryptodev.c

/* SPDX-License-Identifier: BSD-3-Clause
 * Copyright(c) 2015-2017 Intel Corporation
 */

#include <sys/types.h>
#include <sys/queue.h>
#include <ctype.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdarg.h>
#include <errno.h>
#include <stdint.h>
#include <inttypes.h>
#include <netinet/in.h>

#include <rte_byteorder.h>
#include <rte_log.h>
#include <rte_debug.h>
#include <rte_dev.h>
#include <rte_interrupts.h>
#include <rte_memory.h>
#include <rte_memcpy.h>
#include <rte_memzone.h>
#include <rte_launch.h>
#include <rte_tailq.h>
#include <rte_eal.h>
#include <rte_per_lcore.h>
#include <rte_lcore.h>
#include <rte_atomic.h>
#include <rte_branch_prediction.h>
#include <rte_common.h>
#include <rte_mempool.h>
#include <rte_malloc.h>
#include <rte_mbuf.h>
#include <rte_errno.h>
#include <rte_spinlock.h>
#include <rte_string_fns.h>

#include "rte_crypto.h"
#include "rte_cryptodev.h"
#include "rte_cryptodev_pmd.h"

static uint8_t nb_drivers;

static struct rte_cryptodev rte_crypto_devices[RTE_CRYPTO_MAX_DEVS];

struct rte_cryptodev *rte_cryptodevs = rte_crypto_devices;

static struct rte_cryptodev_global cryptodev_globals = {
		.devs			= rte_crypto_devices,
		.data			= { NULL },
		.nb_devs		= 0,
		.max_devs		= RTE_CRYPTO_MAX_DEVS
};

/* spinlock for crypto device callbacks */
static rte_spinlock_t rte_cryptodev_cb_lock = RTE_SPINLOCK_INITIALIZER;


/**
 * The user application callback description.
 *
 * It contains callback address to be registered by user application,
 * the pointer to the parameters for callback, and the event type.
 */
struct rte_cryptodev_callback {
	TAILQ_ENTRY(rte_cryptodev_callback) next; /**< Callbacks list */
	rte_cryptodev_cb_fn cb_fn;		/**< Callback address */
	void *cb_arg;				/**< Parameter for callback */
	enum rte_cryptodev_event_type event;	/**< Interrupt event type */
	uint32_t active;			/**< Callback is executing */
};

/**
 * The crypto cipher algorithm strings identifiers.
 * It could be used in application command line.
 */
const char *
rte_crypto_cipher_algorithm_strings[] = {
	[RTE_CRYPTO_CIPHER_3DES_CBC]	= "3des-cbc",
	[RTE_CRYPTO_CIPHER_3DES_ECB]	= "3des-ecb",
	[RTE_CRYPTO_CIPHER_3DES_CTR]	= "3des-ctr",

	[RTE_CRYPTO_CIPHER_AES_CBC]	= "aes-cbc",
	[RTE_CRYPTO_CIPHER_AES_CTR]	= "aes-ctr",
	[RTE_CRYPTO_CIPHER_AES_DOCSISBPI]	= "aes-docsisbpi",
	[RTE_CRYPTO_CIPHER_AES_ECB]	= "aes-ecb",
	[RTE_CRYPTO_CIPHER_AES_F8]	= "aes-f8",
	[RTE_CRYPTO_CIPHER_AES_XTS]	= "aes-xts",

	[RTE_CRYPTO_CIPHER_ARC4]	= "arc4",

	[RTE_CRYPTO_CIPHER_DES_CBC]     = "des-cbc",
	[RTE_CRYPTO_CIPHER_DES_DOCSISBPI]	= "des-docsisbpi",

	[RTE_CRYPTO_CIPHER_NULL]	= "null",

	[RTE_CRYPTO_CIPHER_KASUMI_F8]	= "kasumi-f8",
	[RTE_CRYPTO_CIPHER_SNOW3G_UEA2]	= "snow3g-uea2",
	[RTE_CRYPTO_CIPHER_ZUC_EEA3]	= "zuc-eea3"
};

/**
 * The crypto cipher operation strings identifiers.
 * It could be used in application command line.
 */
const char *
rte_crypto_cipher_operation_strings[] = {
		[RTE_CRYPTO_CIPHER_OP_ENCRYPT]	= "encrypt",
		[RTE_CRYPTO_CIPHER_OP_DECRYPT]	= "decrypt"
};

/**
 * The crypto auth algorithm strings identifiers.
 * It could be used in application command line.
 */
const char *
rte_crypto_auth_algorithm_strings[] = {
	[RTE_CRYPTO_AUTH_AES_CBC_MAC]	= "aes-cbc-mac",
	[RTE_CRYPTO_AUTH_AES_CMAC]	= "aes-cmac",
	[RTE_CRYPTO_AUTH_AES_GMAC]	= "aes-gmac",
	[RTE_CRYPTO_AUTH_AES_XCBC_MAC]	= "aes-xcbc-mac",

	[RTE_CRYPTO_AUTH_MD5]		= "md5",
	[RTE_CRYPTO_AUTH_MD5_HMAC]	= "md5-hmac",

	[RTE_CRYPTO_AUTH_NULL]		= "null",

	[RTE_CRYPTO_AUTH_SHA1]		= "sha1",
	[RTE_CRYPTO_AUTH_SHA1_HMAC]	= "sha1-hmac",

	[RTE_CRYPTO_AUTH_SHA224]	= "sha2-224",
	[RTE_CRYPTO_AUTH_SHA224_HMAC]	= "sha2-224-hmac",
	[RTE_CRYPTO_AUTH_SHA256]	= "sha2-256",
	[RTE_CRYPTO_AUTH_SHA256_HMAC]	= "sha2-256-hmac",
	[RTE_CRYPTO_AUTH_SHA384]	= "sha2-384",
	[RTE_CRYPTO_AUTH_SHA384_HMAC]	= "sha2-384-hmac",
	[RTE_CRYPTO_AUTH_SHA512]	= "sha2-512",
	[RTE_CRYPTO_AUTH_SHA512_HMAC]	= "sha2-512-hmac",

	[RTE_CRYPTO_AUTH_KASUMI_F9]	= "kasumi-f9",
	[RTE_CRYPTO_AUTH_SNOW3G_UIA2]	= "snow3g-uia2",
	[RTE_CRYPTO_AUTH_ZUC_EIA3]	= "zuc-eia3"
};

/**
 * The crypto AEAD algorithm strings identifiers.
 * It could be used in application command line.
 */
const char *
rte_crypto_aead_algorithm_strings[] = {
	[RTE_CRYPTO_AEAD_AES_CCM]	= "aes-ccm",
	[RTE_CRYPTO_AEAD_AES_GCM]	= "aes-gcm",
};

/**
 * The crypto AEAD operation strings identifiers.
 * It could be used in application command line.
 */
const char *
rte_crypto_aead_operation_strings[] = {
	[RTE_CRYPTO_AEAD_OP_ENCRYPT]	= "encrypt",
	[RTE_CRYPTO_AEAD_OP_DECRYPT]	= "decrypt"
};

/**
 * Asymmetric crypto transform operation strings identifiers.
 */
const char *rte_crypto_asym_xform_strings[] = {
	[RTE_CRYPTO_ASYM_XFORM_NONE]	= "none",
	[RTE_CRYPTO_ASYM_XFORM_RSA]	= "rsa",
	[RTE_CRYPTO_ASYM_XFORM_MODEX]	= "modexp",
	[RTE_CRYPTO_ASYM_XFORM_MODINV]	= "modinv",
	[RTE_CRYPTO_ASYM_XFORM_DH]	= "dh",
	[RTE_CRYPTO_ASYM_XFORM_DSA]	= "dsa",
};

/**
 * Asymmetric crypto operation strings identifiers.
 */
const char *rte_crypto_asym_op_strings[] = {
	[RTE_CRYPTO_ASYM_OP_ENCRYPT]	= "encrypt",
	[RTE_CRYPTO_ASYM_OP_DECRYPT]	= "decrypt",
	[RTE_CRYPTO_ASYM_OP_SIGN]	= "sign",
	[RTE_CRYPTO_ASYM_OP_VERIFY]	= "verify",
	[RTE_CRYPTO_ASYM_OP_PRIVATE_KEY_GENERATE]	= "priv_key_generate",
	[RTE_CRYPTO_ASYM_OP_PUBLIC_KEY_GENERATE] = "pub_key_generate",
	[RTE_CRYPTO_ASYM_OP_SHARED_SECRET_COMPUTE] = "sharedsecret_compute",
};

/**
 * The private data structure stored in the session mempool private data.
 */
struct rte_cryptodev_sym_session_pool_private_data {
	uint16_t nb_drivers;
	/**< number of elements in sess_data array */
	uint16_t user_data_sz;
	/**< session user data will be placed after sess_data */
};

int
rte_cryptodev_get_cipher_algo_enum(enum rte_crypto_cipher_algorithm *algo_enum,
		const char *algo_string)
{
	unsigned int i;

	for (i = 1; i < RTE_DIM(rte_crypto_cipher_algorithm_strings); i++) {
		if (strcmp(algo_string, rte_crypto_cipher_algorithm_strings[i]) == 0) {
			*algo_enum = (enum rte_crypto_cipher_algorithm) i;
			return 0;
		}
	}

	/* Invalid string */
	return -1;
}

int
rte_cryptodev_get_auth_algo_enum(enum rte_crypto_auth_algorithm *algo_enum,
		const char *algo_string)
{
	unsigned int i;

	for (i = 1; i < RTE_DIM(rte_crypto_auth_algorithm_strings); i++) {
		if (strcmp(algo_string, rte_crypto_auth_algorithm_strings[i]) == 0) {
			*algo_enum = (enum rte_crypto_auth_algorithm) i;
			return 0;
		}
	}

	/* Invalid string */
	return -1;
}

int
rte_cryptodev_get_aead_algo_enum(enum rte_crypto_aead_algorithm *algo_enum,
		const char *algo_string)
{
	unsigned int i;

	for (i = 1; i < RTE_DIM(rte_crypto_aead_algorithm_strings); i++) {
		if (strcmp(algo_string, rte_crypto_aead_algorithm_strings[i]) == 0) {
			*algo_enum = (enum rte_crypto_aead_algorithm) i;
			return 0;
		}
	}

	/* Invalid string */
	return -1;
}

int
rte_cryptodev_asym_get_xform_enum(enum rte_crypto_asym_xform_type *xform_enum,
		const char *xform_string)
{
	unsigned int i;

	for (i = 1; i < RTE_DIM(rte_crypto_asym_xform_strings); i++) {
		if (strcmp(xform_string,
			rte_crypto_asym_xform_strings[i]) == 0) {
			*xform_enum = (enum rte_crypto_asym_xform_type) i;
			return 0;
		}
	}

	/* Invalid string */
	return -1;
}

/**
 * The crypto auth operation strings identifiers.
 * It could be used in application command line.
 */
const char *
rte_crypto_auth_operation_strings[] = {
		[RTE_CRYPTO_AUTH_OP_VERIFY]	= "verify",
		[RTE_CRYPTO_AUTH_OP_GENERATE]	= "generate"
};

const struct rte_cryptodev_symmetric_capability *
rte_cryptodev_sym_capability_get(uint8_t dev_id,
		const struct rte_cryptodev_sym_capability_idx *idx)
{
	const struct rte_cryptodev_capabilities *capability;
	struct rte_cryptodev_info dev_info;
	int i = 0;

	rte_cryptodev_info_get(dev_id, &dev_info);

	while ((capability = &dev_info.capabilities[i++])->op !=
			RTE_CRYPTO_OP_TYPE_UNDEFINED) {
		if (capability->op != RTE_CRYPTO_OP_TYPE_SYMMETRIC)
			continue;

		if (capability->sym.xform_type != idx->type)
			continue;

		if (idx->type == RTE_CRYPTO_SYM_XFORM_AUTH &&
			capability->sym.auth.algo == idx->algo.auth)
			return &capability->sym;

		if (idx->type == RTE_CRYPTO_SYM_XFORM_CIPHER &&
			capability->sym.cipher.algo == idx->algo.cipher)
			return &capability->sym;

		if (idx->type == RTE_CRYPTO_SYM_XFORM_AEAD &&
				capability->sym.aead.algo == idx->algo.aead)
			return &capability->sym;
	}

	return NULL;

}

static int
param_range_check(uint16_t size, const struct rte_crypto_param_range *range)
{
	unsigned int next_size;

	/* Check lower/upper bounds */
	if (size < range->min)
		return -1;

	if (size > range->max)
		return -1;

	/* If range is actually only one value, size is correct */
	if (range->increment == 0)
		return 0;

	/* Check if value is one of the supported sizes */
	for (next_size = range->min; next_size <= range->max;
			next_size += range->increment)
		if (size == next_size)
			return 0;

	return -1;
}

const struct rte_cryptodev_asymmetric_xform_capability *
rte_cryptodev_asym_capability_get(uint8_t dev_id,
		const struct rte_cryptodev_asym_capability_idx *idx)
{
	const struct rte_cryptodev_capabilities *capability;
	struct rte_cryptodev_info dev_info;
	unsigned int i = 0;

	memset(&dev_info, 0, sizeof(struct rte_cryptodev_info));
	rte_cryptodev_info_get(dev_id, &dev_info);

	while ((capability = &dev_info.capabilities[i++])->op !=
			RTE_CRYPTO_OP_TYPE_UNDEFINED) {
		if (capability->op != RTE_CRYPTO_OP_TYPE_ASYMMETRIC)
			continue;

		if (capability->asym.xform_capa.xform_type == idx->type)
			return &capability->asym.xform_capa;
	}
	return NULL;
};

int
rte_cryptodev_sym_capability_check_cipher(
		const struct rte_cryptodev_symmetric_capability *capability,
		uint16_t key_size, uint16_t iv_size)
{
	if (param_range_check(key_size, &capability->cipher.key_size) != 0)
		return -1;

	if (param_range_check(iv_size, &capability->cipher.iv_size) != 0)
		return -1;

	return 0;
}

int
rte_cryptodev_sym_capability_check_auth(
		const struct rte_cryptodev_symmetric_capability *capability,
		uint16_t key_size, uint16_t digest_size, uint16_t iv_size)
{
	if (param_range_check(key_size, &capability->auth.key_size) != 0)
		return -1;

	if (param_range_check(digest_size, &capability->auth.digest_size) != 0)
		return -1;

	if (param_range_check(iv_size, &capability->auth.iv_size) != 0)
		return -1;

	return 0;
}

int
rte_cryptodev_sym_capability_check_aead(
		const struct rte_cryptodev_symmetric_capability *capability,
		uint16_t key_size, uint16_t digest_size, uint16_t aad_size,
		uint16_t iv_size)
{
	if (param_range_check(key_size, &capability->aead.key_size) != 0)
		return -1;

	if (param_range_check(digest_size, &capability->aead.digest_size) != 0)
		return -1;

	if (param_range_check(aad_size, &capability->aead.aad_size) != 0)
		return -1;

	if (param_range_check(iv_size, &capability->aead.iv_size) != 0)
		return -1;

	return 0;
}
int
rte_cryptodev_asym_xform_capability_check_optype(
	const struct rte_cryptodev_asymmetric_xform_capability *capability,
	enum rte_crypto_asym_op_type op_type)
{
	if (capability->op_types & (1 << op_type))
		return 1;

	return 0;
}

int
rte_cryptodev_asym_xform_capability_check_modlen(
	const struct rte_cryptodev_asymmetric_xform_capability *capability,
	uint16_t modlen)
{
	/* no need to check for limits, if min or max = 0 */
	if (capability->modlen.min != 0) {
		if (modlen < capability->modlen.min)
			return -1;
	}

	if (capability->modlen.max != 0) {
		if (modlen > capability->modlen.max)
			return -1;
	}

	/* in any case, check if given modlen is module increment */
	if (capability->modlen.increment != 0) {
		if (modlen % (capability->modlen.increment))
			return -1;
	}

	return 0;
}


const char *
rte_cryptodev_get_feature_name(uint64_t flag)
{
	switch (flag) {
	case RTE_CRYPTODEV_FF_SYMMETRIC_CRYPTO:
		return "SYMMETRIC_CRYPTO";
	case RTE_CRYPTODEV_FF_ASYMMETRIC_CRYPTO:
		return "ASYMMETRIC_CRYPTO";
	case RTE_CRYPTODEV_FF_SYM_OPERATION_CHAINING:
		return "SYM_OPERATION_CHAINING";
	case RTE_CRYPTODEV_FF_CPU_SSE:
		return "CPU_SSE";
	case RTE_CRYPTODEV_FF_CPU_AVX:
		return "CPU_AVX";
	case RTE_CRYPTODEV_FF_CPU_AVX2:
		return "CPU_AVX2";
	case RTE_CRYPTODEV_FF_CPU_AVX512:
		return "CPU_AVX512";
	case RTE_CRYPTODEV_FF_CPU_AESNI:
		return "CPU_AESNI";
	case RTE_CRYPTODEV_FF_HW_ACCELERATED:
		return "HW_ACCELERATED";
	case RTE_CRYPTODEV_FF_IN_PLACE_SGL:
		return "IN_PLACE_SGL";
	case RTE_CRYPTODEV_FF_OOP_SGL_IN_SGL_OUT:
		return "OOP_SGL_IN_SGL_OUT";
	case RTE_CRYPTODEV_FF_OOP_SGL_IN_LB_OUT:
		return "OOP_SGL_IN_LB_OUT";
	case RTE_CRYPTODEV_FF_OOP_LB_IN_SGL_OUT:
		return "OOP_LB_IN_SGL_OUT";
	case RTE_CRYPTODEV_FF_OOP_LB_IN_LB_OUT:
		return "OOP_LB_IN_LB_OUT";
	case RTE_CRYPTODEV_FF_CPU_NEON:
		return "CPU_NEON";
	case RTE_CRYPTODEV_FF_CPU_ARM_CE:
		return "CPU_ARM_CE";
	case RTE_CRYPTODEV_FF_SECURITY:
		return "SECURITY_PROTOCOL";
	case RTE_CRYPTODEV_FF_RSA_PRIV_OP_KEY_EXP:
		return "RSA_PRIV_OP_KEY_EXP";
	case RTE_CRYPTODEV_FF_RSA_PRIV_OP_KEY_QT:
		return "RSA_PRIV_OP_KEY_QT";
	default:
		return NULL;
	}
}

struct rte_cryptodev *
rte_cryptodev_pmd_get_dev(uint8_t dev_id)
{
	return &cryptodev_globals.devs[dev_id];
}

struct rte_cryptodev *
rte_cryptodev_pmd_get_named_dev(const char *name)
{
	struct rte_cryptodev *dev;
	unsigned int i;

	if (name == NULL)
		return NULL;

	for (i = 0; i < cryptodev_globals.max_devs; i++) {
		dev = &cryptodev_globals.devs[i];

		if ((dev->attached == RTE_CRYPTODEV_ATTACHED) &&
				(strcmp(dev->data->name, name) == 0))
			return dev;
	}

	return NULL;
}

unsigned int
rte_cryptodev_pmd_is_valid_dev(uint8_t dev_id)
{
	struct rte_cryptodev *dev = NULL;

	if (dev_id >= cryptodev_globals.nb_devs)
		return 0;

	dev = rte_cryptodev_pmd_get_dev(dev_id);
	if (dev->attached != RTE_CRYPTODEV_ATTACHED)
		return 0;
	else
		return 1;
}


int
rte_cryptodev_get_dev_id(const char *name)
{
	unsigned i;

	if (name == NULL)
		return -1;

	for (i = 0; i < cryptodev_globals.nb_devs; i++)
		if ((strcmp(cryptodev_globals.devs[i].data->name, name)
				== 0) &&
				(cryptodev_globals.devs[i].attached ==
						RTE_CRYPTODEV_ATTACHED))
			return i;

	return -1;
}

uint8_t
rte_cryptodev_count(void)
{
	return cryptodev_globals.nb_devs;
}

uint8_t
rte_cryptodev_device_count_by_driver(uint8_t driver_id)
{
	uint8_t i, dev_count = 0;

	for (i = 0; i < cryptodev_globals.max_devs; i++)
		if (cryptodev_globals.devs[i].driver_id == driver_id &&
			cryptodev_globals.devs[i].attached ==
					RTE_CRYPTODEV_ATTACHED)
			dev_count++;

	return dev_count;
}

uint8_t
rte_cryptodev_devices_get(const char *driver_name, uint8_t *devices,
	uint8_t nb_devices)
{
	uint8_t i, count = 0;
	struct rte_cryptodev *devs = cryptodev_globals.devs;
	uint8_t max_devs = cryptodev_globals.max_devs;

	for (i = 0; i < max_devs && count < nb_devices;	i++) {

		if (devs[i].attached == RTE_CRYPTODEV_ATTACHED) {
			int cmp;

			cmp = strncmp(devs[i].device->driver->name,
					driver_name,
					strlen(driver_name) + 1);

			if (cmp == 0)
				devices[count++] = devs[i].data->dev_id;
		}
	}

	return count;
}

void *
rte_cryptodev_get_sec_ctx(uint8_t dev_id)
{
	if (rte_crypto_devices[dev_id].feature_flags &
			RTE_CRYPTODEV_FF_SECURITY)
		return rte_crypto_devices[dev_id].security_ctx;

	return NULL;
}

int
rte_cryptodev_socket_id(uint8_t dev_id)
{
	struct rte_cryptodev *dev;

	if (!rte_cryptodev_pmd_is_valid_dev(dev_id))
		return -1;

	dev = rte_cryptodev_pmd_get_dev(dev_id);

	return dev->data->socket_id;
}

static inline int
rte_cryptodev_data_alloc(uint8_t dev_id, struct rte_cryptodev_data **data,
		int socket_id)
{
	char mz_name[RTE_CRYPTODEV_NAME_MAX_LEN];
	const struct rte_memzone *mz;
	int n;

	/* generate memzone name */
	n = snprintf(mz_name, sizeof(mz_name), "rte_cryptodev_data_%u", dev_id);
	if (n >= (int)sizeof(mz_name))
		return -EINVAL;

	if (rte_eal_process_type() == RTE_PROC_PRIMARY) {
		mz = rte_memzone_reserve(mz_name,
				sizeof(struct rte_cryptodev_data),
				socket_id, 0);
	} else
		mz = rte_memzone_lookup(mz_name);

	if (mz == NULL)
		return -ENOMEM;

	*data = mz->addr;
	if (rte_eal_process_type() == RTE_PROC_PRIMARY)
		memset(*data, 0, sizeof(struct rte_cryptodev_data));

	return 0;
}

static uint8_t
rte_cryptodev_find_free_device_index(void)
{
	uint8_t dev_id;

	for (dev_id = 0; dev_id < RTE_CRYPTO_MAX_DEVS; dev_id++) {
		if (rte_crypto_devices[dev_id].attached ==
				RTE_CRYPTODEV_DETACHED)
			return dev_id;
	}
	return RTE_CRYPTO_MAX_DEVS;
}

struct rte_cryptodev *
rte_cryptodev_pmd_allocate(const char *name, int socket_id)
{
	struct rte_cryptodev *cryptodev;
	uint8_t dev_id;

	if (rte_cryptodev_pmd_get_named_dev(name) != NULL) {
		CDEV_LOG_ERR("Crypto device with name %s already "
				"allocated!", name);
		return NULL;
	}

	dev_id = rte_cryptodev_find_free_device_index();
	if (dev_id == RTE_CRYPTO_MAX_DEVS) {
		CDEV_LOG_ERR("Reached maximum number of crypto devices");
		return NULL;
	}

	cryptodev = rte_cryptodev_pmd_get_dev(dev_id);

	if (cryptodev->data == NULL) {
		struct rte_cryptodev_data *cryptodev_data =
				cryptodev_globals.data[dev_id];

		int retval = rte_cryptodev_data_alloc(dev_id, &cryptodev_data,
				socket_id);

		if (retval < 0 || cryptodev_data == NULL)
			return NULL;

		cryptodev->data = cryptodev_data;

		strlcpy(cryptodev->data->name, name,
			RTE_CRYPTODEV_NAME_MAX_LEN);

		cryptodev->data->dev_id = dev_id;
		cryptodev->data->socket_id = socket_id;
		cryptodev->data->dev_started = 0;

		/* init user callbacks */
		TAILQ_INIT(&(cryptodev->link_intr_cbs));

		cryptodev->attached = RTE_CRYPTODEV_ATTACHED;

		cryptodev_globals.nb_devs++;
	}

	return cryptodev;
}

int
rte_cryptodev_pmd_release_device(struct rte_cryptodev *cryptodev)
{
	int ret;

	if (cryptodev == NULL)
		return -EINVAL;

	/* Close device only if device operations have been set */
	if (cryptodev->dev_ops) {
		ret = rte_cryptodev_close(cryptodev->data->dev_id);
		if (ret < 0)
			return ret;
	}

	cryptodev->attached = RTE_CRYPTODEV_DETACHED;
	cryptodev_globals.nb_devs--;
	return 0;
}

uint16_t
rte_cryptodev_queue_pair_count(uint8_t dev_id)
{
	struct rte_cryptodev *dev;

	dev = &rte_crypto_devices[dev_id];
	return dev->data->nb_queue_pairs;
}

static int
rte_cryptodev_queue_pairs_config(struct rte_cryptodev *dev, uint16_t nb_qpairs,
		int socket_id)
{
	struct rte_cryptodev_info dev_info;
	void **qp;
	unsigned i;

	if ((dev == NULL) || (nb_qpairs < 1)) {
		CDEV_LOG_ERR("invalid param: dev %p, nb_queues %u",
							dev, nb_qpairs);
		return -EINVAL;
	}

	CDEV_LOG_DEBUG("Setup %d queues pairs on device %u",
			nb_qpairs, dev->data->dev_id);

	memset(&dev_info, 0, sizeof(struct rte_cryptodev_info));

	RTE_FUNC_PTR_OR_ERR_RET(*dev->dev_ops->dev_infos_get, -ENOTSUP);
	(*dev->dev_ops->dev_infos_get)(dev, &dev_info);

	if (nb_qpairs > (dev_info.max_nb_queue_pairs)) {
		CDEV_LOG_ERR("Invalid num queue_pairs (%u) for dev %u",
				nb_qpairs, dev->data->dev_id);
	    return -EINVAL;
	}

	if (dev->data->queue_pairs == NULL) { /* first time configuration */
		dev->data->queue_pairs = rte_zmalloc_socket(
				"cryptodev->queue_pairs",
				sizeof(dev->data->queue_pairs[0]) * nb_qpairs,
				RTE_CACHE_LINE_SIZE, socket_id);

		if (dev->data->queue_pairs == NULL) {
			dev->data->nb_queue_pairs = 0;
			CDEV_LOG_ERR("failed to get memory for qp meta data, "
							"nb_queues %u",
							nb_qpairs);
			return -(ENOMEM);
		}
	} else { /* re-configure */
		int ret;
		uint16_t old_nb_queues = dev->data->nb_queue_pairs;

		qp = dev->data->queue_pairs;

		RTE_FUNC_PTR_OR_ERR_RET(*dev->dev_ops->queue_pair_release,
				-ENOTSUP);

		for (i = nb_qpairs; i < old_nb_queues; i++) {
			ret = (*dev->dev_ops->queue_pair_release)(dev, i);
			if (ret < 0)
				return ret;
		}

		qp = rte_realloc(qp, sizeof(qp[0]) * nb_qpairs,
				RTE_CACHE_LINE_SIZE);
		if (qp == NULL) {
			CDEV_LOG_ERR("failed to realloc qp meta data,"
						" nb_queues %u", nb_qpairs);
			return -(ENOMEM);
		}

		if (nb_qpairs > old_nb_queues) {
			uint16_t new_qs = nb_qpairs - old_nb_queues;

			memset(qp + old_nb_queues, 0,
				sizeof(qp[0]) * new_qs);
		}

		dev->data->queue_pairs = qp;

	}
	dev->data->nb_queue_pairs = nb_qpairs;
	return 0;
}

int
rte_cryptodev_configure(uint8_t dev_id, struct rte_cryptodev_config *config)
{
	struct rte_cryptodev *dev;
	int diag;

	if (!rte_cryptodev_pmd_is_valid_dev(dev_id)) {
		CDEV_LOG_ERR("Invalid dev_id=%" PRIu8, dev_id);
		return -EINVAL;
	}

	dev = &rte_crypto_devices[dev_id];

	if (dev->data->dev_started) {
		CDEV_LOG_ERR(
		    "device %d must be stopped to allow configuration", dev_id);
		return -EBUSY;
	}

	RTE_FUNC_PTR_OR_ERR_RET(*dev->dev_ops->dev_configure, -ENOTSUP);

	/* Setup new number of queue pairs and reconfigure device. */
	diag = rte_cryptodev_queue_pairs_config(dev, config->nb_queue_pairs,
			config->socket_id);
	if (diag != 0) {
		CDEV_LOG_ERR("dev%d rte_crypto_dev_queue_pairs_config = %d",
				dev_id, diag);
		return diag;
	}

	return (*dev->dev_ops->dev_configure)(dev, config);
}


int
rte_cryptodev_start(uint8_t dev_id)
{
	struct rte_cryptodev *dev;
	int diag;

	CDEV_LOG_DEBUG("Start dev_id=%" PRIu8, dev_id);

	if (!rte_cryptodev_pmd_is_valid_dev(dev_id)) {
		CDEV_LOG_ERR("Invalid dev_id=%" PRIu8, dev_id);
		return -EINVAL;
	}

	dev = &rte_crypto_devices[dev_id];

	RTE_FUNC_PTR_OR_ERR_RET(*dev->dev_ops->dev_start, -ENOTSUP);

	if (dev->data->dev_started != 0) {
		CDEV_LOG_ERR("Device with dev_id=%" PRIu8 " already started",
			dev_id);
		return 0;
	}

	diag = (*dev->dev_ops->dev_start)(dev);
	if (diag == 0)
		dev->data->dev_started = 1;
	else
		return diag;

	return 0;
}

void
rte_cryptodev_stop(uint8_t dev_id)
{
	struct rte_cryptodev *dev;

	if (!rte_cryptodev_pmd_is_valid_dev(dev_id)) {
		CDEV_LOG_ERR("Invalid dev_id=%" PRIu8, dev_id);
		return;
	}

	dev = &rte_crypto_devices[dev_id];

	RTE_FUNC_PTR_OR_RET(*dev->dev_ops->dev_stop);

	if (dev->data->dev_started == 0) {
		CDEV_LOG_ERR("Device with dev_id=%" PRIu8 " already stopped",
			dev_id);
		return;
	}

	(*dev->dev_ops->dev_stop)(dev);
	dev->data->dev_started = 0;
}

int
rte_cryptodev_close(uint8_t dev_id)
{
	struct rte_cryptodev *dev;
	int retval;

	if (!rte_cryptodev_pmd_is_valid_dev(dev_id)) {
		CDEV_LOG_ERR("Invalid dev_id=%" PRIu8, dev_id);
		return -1;
	}

	dev = &rte_crypto_devices[dev_id];

	/* Device must be stopped before it can be closed */
	if (dev->data->dev_started == 1) {
		CDEV_LOG_ERR("Device %u must be stopped before closing",
				dev_id);
		return -EBUSY;
	}

	/* We can't close the device if there are outstanding sessions in use */
	if (dev->data->session_pool != NULL) {
		if (!rte_mempool_full(dev->data->session_pool)) {
			CDEV_LOG_ERR("dev_id=%u close failed, session mempool "
					"has sessions still in use, free "
					"all sessions before calling close",
					(unsigned)dev_id);
			return -EBUSY;
		}
	}

	RTE_FUNC_PTR_OR_ERR_RET(*dev->dev_ops->dev_close, -ENOTSUP);
	retval = (*dev->dev_ops->dev_close)(dev);

	if (retval < 0)
		return retval;

	return 0;
}

int
rte_cryptodev_queue_pair_setup(uint8_t dev_id, uint16_t queue_pair_id,
		const struct rte_cryptodev_qp_conf *qp_conf, int socket_id)

{
	struct rte_cryptodev *dev;

	if (!rte_cryptodev_pmd_is_valid_dev(dev_id)) {
		CDEV_LOG_ERR("Invalid dev_id=%" PRIu8, dev_id);
		return -EINVAL;
	}

	dev = &rte_crypto_devices[dev_id];
	if (queue_pair_id >= dev->data->nb_queue_pairs) {
		CDEV_LOG_ERR("Invalid queue_pair_id=%d", queue_pair_id);
		return -EINVAL;
	}

	if (!qp_conf) {
		CDEV_LOG_ERR("qp_conf cannot be NULL\n");
		return -EINVAL;
	}

	if ((qp_conf->mp_session && !qp_conf->mp_session_private) ||
			(!qp_conf->mp_session && qp_conf->mp_session_private)) {
		CDEV_LOG_ERR("Invalid mempools\n");
		return -EINVAL;
	}

	if (qp_conf->mp_session) {
		struct rte_cryptodev_sym_session_pool_private_data *pool_priv;
		uint32_t obj_size = qp_conf->mp_session->elt_size;
		uint32_t obj_priv_size = qp_conf->mp_session_private->elt_size;
		struct rte_cryptodev_sym_session s = {0};

		pool_priv = rte_mempool_get_priv(qp_conf->mp_session);
		if (!pool_priv || qp_conf->mp_session->private_data_size <
				sizeof(*pool_priv)) {
			CDEV_LOG_ERR("Invalid mempool\n");
			return -EINVAL;
		}

		s.nb_drivers = pool_priv->nb_drivers;
		s.user_data_sz = pool_priv->user_data_sz;

		if ((rte_cryptodev_sym_get_existing_header_session_size(&s) >
			obj_size) || (s.nb_drivers <= dev->driver_id) ||
			rte_cryptodev_sym_get_private_session_size(dev_id) >
				obj_priv_size) {
			CDEV_LOG_ERR("Invalid mempool\n");
			return -EINVAL;
		}
	}

	if (dev->data->dev_started) {
		CDEV_LOG_ERR(
		    "device %d must be stopped to allow configuration", dev_id);
		return -EBUSY;
	}

	RTE_FUNC_PTR_OR_ERR_RET(*dev->dev_ops->queue_pair_setup, -ENOTSUP);

	return (*dev->dev_ops->queue_pair_setup)(dev, queue_pair_id, qp_conf,
			socket_id);
}


int
rte_cryptodev_stats_get(uint8_t dev_id, struct rte_cryptodev_stats *stats)
{
	struct rte_cryptodev *dev;

	if (!rte_cryptodev_pmd_is_valid_dev(dev_id)) {
		CDEV_LOG_ERR("Invalid dev_id=%d", dev_id);
		return -ENODEV;
	}

	if (stats == NULL) {
		CDEV_LOG_ERR("Invalid stats ptr");
		return -EINVAL;
	}

	dev = &rte_crypto_devices[dev_id];
	memset(stats, 0, sizeof(*stats));

	RTE_FUNC_PTR_OR_ERR_RET(*dev->dev_ops->stats_get, -ENOTSUP);
	(*dev->dev_ops->stats_get)(dev, stats);
	return 0;
}

void
rte_cryptodev_stats_reset(uint8_t dev_id)
{
	struct rte_cryptodev *dev;

	if (!rte_cryptodev_pmd_is_valid_dev(dev_id)) {
		CDEV_LOG_ERR("Invalid dev_id=%" PRIu8, dev_id);
		return;
	}

	dev = &rte_crypto_devices[dev_id];

	RTE_FUNC_PTR_OR_RET(*dev->dev_ops->stats_reset);
	(*dev->dev_ops->stats_reset)(dev);
}


void
rte_cryptodev_info_get(uint8_t dev_id, struct rte_cryptodev_info *dev_info)
{
	struct rte_cryptodev *dev;

	if (dev_id >= cryptodev_globals.nb_devs) {
		CDEV_LOG_ERR("Invalid dev_id=%d", dev_id);
		return;
	}

	dev = &rte_crypto_devices[dev_id];

	memset(dev_info, 0, sizeof(struct rte_cryptodev_info));

	RTE_FUNC_PTR_OR_RET(*dev->dev_ops->dev_infos_get);
	(*dev->dev_ops->dev_infos_get)(dev, dev_info);

	dev_info->driver_name = dev->device->driver->name;
	dev_info->device = dev->device;
}


int
rte_cryptodev_callback_register(uint8_t dev_id,
			enum rte_cryptodev_event_type event,
			rte_cryptodev_cb_fn cb_fn, void *cb_arg)
{
	struct rte_cryptodev *dev;
	struct rte_cryptodev_callback *user_cb;

	if (!cb_fn)
		return -EINVAL;

	if (!rte_cryptodev_pmd_is_valid_dev(dev_id)) {
		CDEV_LOG_ERR("Invalid dev_id=%" PRIu8, dev_id);
		return -EINVAL;
	}

	dev = &rte_crypto_devices[dev_id];
	rte_spinlock_lock(&rte_cryptodev_cb_lock);

	TAILQ_FOREACH(user_cb, &(dev->link_intr_cbs), next) {
		if (user_cb->cb_fn == cb_fn &&
			user_cb->cb_arg == cb_arg &&
			user_cb->event == event) {
			break;
		}
	}

	/* create a new callback. */
	if (user_cb == NULL) {
		user_cb = rte_zmalloc("INTR_USER_CALLBACK",
				sizeof(struct rte_cryptodev_callback), 0);
		if (user_cb != NULL) {
			user_cb->cb_fn = cb_fn;
			user_cb->cb_arg = cb_arg;
			user_cb->event = event;
			TAILQ_INSERT_TAIL(&(dev->link_intr_cbs), user_cb, next);
		}
	}

	rte_spinlock_unlock(&rte_cryptodev_cb_lock);
	return (user_cb == NULL) ? -ENOMEM : 0;
}

int
rte_cryptodev_callback_unregister(uint8_t dev_id,
			enum rte_cryptodev_event_type event,
			rte_cryptodev_cb_fn cb_fn, void *cb_arg)
{
	int ret;
	struct rte_cryptodev *dev;
	struct rte_cryptodev_callback *cb, *next;

	if (!cb_fn)
		return -EINVAL;

	if (!rte_cryptodev_pmd_is_valid_dev(dev_id)) {
		CDEV_LOG_ERR("Invalid dev_id=%" PRIu8, dev_id);
		return -EINVAL;
	}

	dev = &rte_crypto_devices[dev_id];
	rte_spinlock_lock(&rte_cryptodev_cb_lock);

	ret = 0;
	for (cb = TAILQ_FIRST(&dev->link_intr_cbs); cb != NULL; cb = next) {

		next = TAILQ_NEXT(cb, next);

		if (cb->cb_fn != cb_fn || cb->event != event ||
				(cb->cb_arg != (void *)-1 &&
				cb->cb_arg != cb_arg))
			continue;

		/*
		 * if this callback is not executing right now,
		 * then remove it.
		 */
		if (cb->active == 0) {
			TAILQ_REMOVE(&(dev->link_intr_cbs), cb, next);
			rte_free(cb);
		} else {
			ret = -EAGAIN;
		}
	}

	rte_spinlock_unlock(&rte_cryptodev_cb_lock);
	return ret;
}

void
rte_cryptodev_pmd_callback_process(struct rte_cryptodev *dev,
	enum rte_cryptodev_event_type event)
{
	struct rte_cryptodev_callback *cb_lst;
	struct rte_cryptodev_callback dev_cb;

	rte_spinlock_lock(&rte_cryptodev_cb_lock);
	TAILQ_FOREACH(cb_lst, &(dev->link_intr_cbs), next) {
		if (cb_lst->cb_fn == NULL || cb_lst->event != event)
			continue;
		dev_cb = *cb_lst;
		cb_lst->active = 1;
		rte_spinlock_unlock(&rte_cryptodev_cb_lock);
		dev_cb.cb_fn(dev->data->dev_id, dev_cb.event,
						dev_cb.cb_arg);
		rte_spinlock_lock(&rte_cryptodev_cb_lock);
		cb_lst->active = 0;
	}
	rte_spinlock_unlock(&rte_cryptodev_cb_lock);
}


int
rte_cryptodev_sym_session_init(uint8_t dev_id,
		struct rte_cryptodev_sym_session *sess,
		struct rte_crypto_sym_xform *xforms,
		struct rte_mempool *mp)
{
	struct rte_cryptodev *dev;
	uint32_t sess_priv_sz = rte_cryptodev_sym_get_private_session_size(
			dev_id);
	uint8_t index;
	int ret;

	dev = rte_cryptodev_pmd_get_dev(dev_id);

	if (sess == NULL || xforms == NULL || dev == NULL)
		return -EINVAL;

	if (mp->elt_size < sess_priv_sz)
		return -EINVAL;

	index = dev->driver_id;
	if (index >= sess->nb_drivers)
		return -EINVAL;

	RTE_FUNC_PTR_OR_ERR_RET(*dev->dev_ops->sym_session_configure, -ENOTSUP);

	if (sess->sess_data[index].refcnt == 0) {
		ret = dev->dev_ops->sym_session_configure(dev, xforms,
							sess, mp);
		if (ret < 0) {
			CDEV_LOG_ERR(
				"dev_id %d failed to configure session details",
				dev_id);
			return ret;
		}
	}

	sess->sess_data[index].refcnt++;
	return 0;
}

int
rte_cryptodev_asym_session_init(uint8_t dev_id,
		struct rte_cryptodev_asym_session *sess,
		struct rte_crypto_asym_xform *xforms,
		struct rte_mempool *mp)
{
	struct rte_cryptodev *dev;
	uint8_t index;
	int ret;

	dev = rte_cryptodev_pmd_get_dev(dev_id);

	if (sess == NULL || xforms == NULL || dev == NULL)
		return -EINVAL;

	index = dev->driver_id;

	RTE_FUNC_PTR_OR_ERR_RET(*dev->dev_ops->asym_session_configure,
				-ENOTSUP);

	if (sess->sess_private_data[index] == NULL) {
		ret = dev->dev_ops->asym_session_configure(dev,
							xforms,
							sess, mp);
		if (ret < 0) {
			CDEV_LOG_ERR(
				"dev_id %d failed to configure session details",
				dev_id);
			return ret;
		}
	}

	return 0;
}

struct rte_mempool *
rte_cryptodev_sym_session_pool_create(const char *name, uint32_t nb_elts,
	uint32_t elt_size, uint32_t cache_size, uint16_t user_data_size,
	int socket_id)
{
	struct rte_mempool *mp;
	struct rte_cryptodev_sym_session_pool_private_data *pool_priv;
	uint32_t obj_sz;

	obj_sz = rte_cryptodev_sym_get_header_session_size() + user_data_size;
	if (obj_sz > elt_size)
		CDEV_LOG_INFO("elt_size %u is expanded to %u\n", elt_size,
				obj_sz);
	else
		obj_sz = elt_size;

	mp = rte_mempool_create(name, nb_elts, obj_sz, cache_size,
			(uint32_t)(sizeof(*pool_priv)),
			NULL, NULL, NULL, NULL,
			socket_id, 0);
	if (mp == NULL) {
		CDEV_LOG_ERR("%s(name=%s) failed, rte_errno=%d\n",
			__func__, name, rte_errno);
		return NULL;
	}

	pool_priv = rte_mempool_get_priv(mp);
	if (!pool_priv) {
		CDEV_LOG_ERR("%s(name=%s) failed to get private data\n",
			__func__, name);
		rte_mempool_free(mp);
		return NULL;
	}

	pool_priv->nb_drivers = nb_drivers;
	pool_priv->user_data_sz = user_data_size;

	return mp;
}

static unsigned int
rte_cryptodev_sym_session_data_size(struct rte_cryptodev_sym_session *sess)
{
	return (sizeof(sess->sess_data[0]) * sess->nb_drivers) +
			sess->user_data_sz;
}

struct rte_cryptodev_sym_session *
rte_cryptodev_sym_session_create(struct rte_mempool *mp)
{
	struct rte_cryptodev_sym_session *sess;
	struct rte_cryptodev_sym_session_pool_private_data *pool_priv;

	if (!mp) {
		CDEV_LOG_ERR("Invalid mempool\n");
		return NULL;
	}

	pool_priv = rte_mempool_get_priv(mp);

	if (!pool_priv || mp->private_data_size < sizeof(*pool_priv)) {
		CDEV_LOG_ERR("Invalid mempool\n");
		return NULL;
	}

	/* Allocate a session structure from the session pool */
	if (rte_mempool_get(mp, (void **)&sess)) {
		CDEV_LOG_ERR("couldn't get object from session mempool");
		return NULL;
	}

	sess->nb_drivers = pool_priv->nb_drivers;
	sess->user_data_sz = pool_priv->user_data_sz;
	sess->opaque_data = 0;

	/* Clear device session pointer.
	 * Include the flag indicating presence of user data
	 */
	memset(sess->sess_data, 0,
			rte_cryptodev_sym_session_data_size(sess));

	return sess;
}

struct rte_cryptodev_asym_session *
rte_cryptodev_asym_session_create(struct rte_mempool *mp)
{
	struct rte_cryptodev_asym_session *sess;

	/* Allocate a session structure from the session pool */
	if (rte_mempool_get(mp, (void **)&sess)) {
		CDEV_LOG_ERR("couldn't get object from session mempool");
		return NULL;
	}

	/* Clear device session pointer.
	 * Include the flag indicating presence of private data
	 */
	memset(sess, 0, (sizeof(void *) * nb_drivers) + sizeof(uint8_t));

	return sess;
}

int
rte_cryptodev_sym_session_clear(uint8_t dev_id,
		struct rte_cryptodev_sym_session *sess)
{
	struct rte_cryptodev *dev;
	uint8_t driver_id;

	dev = rte_cryptodev_pmd_get_dev(dev_id);

	if (dev == NULL || sess == NULL)
		return -EINVAL;

	driver_id = dev->driver_id;
	if (sess->sess_data[driver_id].refcnt == 0)
		return 0;
	if (--sess->sess_data[driver_id].refcnt != 0)
		return -EBUSY;

	RTE_FUNC_PTR_OR_ERR_RET(*dev->dev_ops->sym_session_clear, -ENOTSUP);

	dev->dev_ops->sym_session_clear(dev, sess);

	return 0;
}

int
rte_cryptodev_asym_session_clear(uint8_t dev_id,
		struct rte_cryptodev_asym_session *sess)
{
	struct rte_cryptodev *dev;

	dev = rte_cryptodev_pmd_get_dev(dev_id);

	if (dev == NULL || sess == NULL)
		return -EINVAL;

	RTE_FUNC_PTR_OR_ERR_RET(*dev->dev_ops->asym_session_clear, -ENOTSUP);

	dev->dev_ops->asym_session_clear(dev, sess);

	return 0;
}

int
rte_cryptodev_sym_session_free(struct rte_cryptodev_sym_session *sess)
{
	uint8_t i;
	struct rte_mempool *sess_mp;

	if (sess == NULL)
		return -EINVAL;

	/* Check that all device private data has been freed */
	for (i = 0; i < sess->nb_drivers; i++) {
		if (sess->sess_data[i].refcnt != 0)
			return -EBUSY;
	}

	/* Return session to mempool */
	sess_mp = rte_mempool_from_obj(sess);
	rte_mempool_put(sess_mp, sess);

	return 0;
}

int
rte_cryptodev_asym_session_free(struct rte_cryptodev_asym_session *sess)
{
	uint8_t i;
	void *sess_priv;
	struct rte_mempool *sess_mp;

	if (sess == NULL)
		return -EINVAL;

	/* Check that all device private data has been freed */
	for (i = 0; i < nb_drivers; i++) {
		sess_priv = get_asym_session_private_data(sess, i);
		if (sess_priv != NULL)
			return -EBUSY;
	}

	/* Return session to mempool */
	sess_mp = rte_mempool_from_obj(sess);
	rte_mempool_put(sess_mp, sess);

	return 0;
}

unsigned int
rte_cryptodev_sym_get_header_session_size(void)
{
	/*
	 * Header contains pointers to the private data of all registered
	 * drivers and all necessary information to ensure safely clear
	 * or free al session.
	 */
	struct rte_cryptodev_sym_session s = {0};

	s.nb_drivers = nb_drivers;

	return (unsigned int)(sizeof(s) +
			rte_cryptodev_sym_session_data_size(&s));
}

unsigned int
rte_cryptodev_sym_get_existing_header_session_size(
		struct rte_cryptodev_sym_session *sess)
{
	if (!sess)
		return 0;
	else
		return (unsigned int)(sizeof(*sess) +
				rte_cryptodev_sym_session_data_size(sess));
}

unsigned int
rte_cryptodev_asym_get_header_session_size(void)
{
	/*
	 * Header contains pointers to the private data
	 * of all registered drivers, and a flag which
	 * indicates presence of private data
	 */
	return ((sizeof(void *) * nb_drivers) + sizeof(uint8_t));
}

unsigned int
rte_cryptodev_sym_get_private_session_size(uint8_t dev_id)
{
	struct rte_cryptodev *dev;
	unsigned int priv_sess_size;

	if (!rte_cryptodev_pmd_is_valid_dev(dev_id))
		return 0;

	dev = rte_cryptodev_pmd_get_dev(dev_id);

	if (*dev->dev_ops->sym_session_get_size == NULL)
		return 0;

	priv_sess_size = (*dev->dev_ops->sym_session_get_size)(dev);

	return priv_sess_size;
}

unsigned int
rte_cryptodev_asym_get_private_session_size(uint8_t dev_id)
{
	struct rte_cryptodev *dev;
	unsigned int header_size = sizeof(void *) * nb_drivers;
	unsigned int priv_sess_size;

	if (!rte_cryptodev_pmd_is_valid_dev(dev_id))
		return 0;

	dev = rte_cryptodev_pmd_get_dev(dev_id);

	if (*dev->dev_ops->asym_session_get_size == NULL)
		return 0;

	priv_sess_size = (*dev->dev_ops->asym_session_get_size)(dev);
	if (priv_sess_size < header_size)
		return header_size;

	return priv_sess_size;

}

int
rte_cryptodev_sym_session_set_user_data(
					struct rte_cryptodev_sym_session *sess,
					void *data,
					uint16_t size)
{
	if (sess == NULL)
		return -EINVAL;

	if (sess->user_data_sz < size)
		return -ENOMEM;

	rte_memcpy(sess->sess_data + sess->nb_drivers, data, size);
	return 0;
}

void *
rte_cryptodev_sym_session_get_user_data(
					struct rte_cryptodev_sym_session *sess)
{
	if (sess == NULL || sess->user_data_sz == 0)
		return NULL;

	return (void *)(sess->sess_data + sess->nb_drivers);
}

/** Initialise rte_crypto_op mempool element */
static void
rte_crypto_op_init(struct rte_mempool *mempool,
		void *opaque_arg,
		void *_op_data,
		__rte_unused unsigned i)
{
	struct rte_crypto_op *op = _op_data;
	enum rte_crypto_op_type type = *(enum rte_crypto_op_type *)opaque_arg;

	memset(_op_data, 0, mempool->elt_size);

	__rte_crypto_op_reset(op, type);

	op->phys_addr = rte_mem_virt2iova(_op_data);
	op->mempool = mempool;
}


struct rte_mempool *
rte_crypto_op_pool_create(const char *name, enum rte_crypto_op_type type,
		unsigned nb_elts, unsigned cache_size, uint16_t priv_size,
		int socket_id)
{
	struct rte_crypto_op_pool_private *priv;

	unsigned elt_size = sizeof(struct rte_crypto_op) +
			priv_size;

	if (type == RTE_CRYPTO_OP_TYPE_SYMMETRIC) {
		elt_size += sizeof(struct rte_crypto_sym_op);
	} else if (type == RTE_CRYPTO_OP_TYPE_ASYMMETRIC) {
		elt_size += sizeof(struct rte_crypto_asym_op);
	} else if (type == RTE_CRYPTO_OP_TYPE_UNDEFINED) {
		elt_size += RTE_MAX(sizeof(struct rte_crypto_sym_op),
		                    sizeof(struct rte_crypto_asym_op));
	} else {
		CDEV_LOG_ERR("Invalid op_type\n");
		return NULL;
	}

	/* lookup mempool in case already allocated */
	struct rte_mempool *mp = rte_mempool_lookup(name);

	if (mp != NULL) {
		priv = (struct rte_crypto_op_pool_private *)
				rte_mempool_get_priv(mp);

		if (mp->elt_size != elt_size ||
				mp->cache_size < cache_size ||
				mp->size < nb_elts ||
				priv->priv_size <  priv_size) {
			mp = NULL;
			CDEV_LOG_ERR("Mempool %s already exists but with "
					"incompatible parameters", name);
			return NULL;
		}
		return mp;
	}

	mp = rte_mempool_create(
			name,
			nb_elts,
			elt_size,
			cache_size,
			sizeof(struct rte_crypto_op_pool_private),
			NULL,
			NULL,
			rte_crypto_op_init,
			&type,
			socket_id,
			0);

	if (mp == NULL) {
		CDEV_LOG_ERR("Failed to create mempool %s", name);
		return NULL;
	}

	priv = (struct rte_crypto_op_pool_private *)
			rte_mempool_get_priv(mp);

	priv->priv_size = priv_size;
	priv->type = type;

	return mp;
}

int
rte_cryptodev_pmd_create_dev_name(char *name, const char *dev_name_prefix)
{
	struct rte_cryptodev *dev = NULL;
	uint32_t i = 0;

	if (name == NULL)
		return -EINVAL;

	for (i = 0; i < RTE_CRYPTO_MAX_DEVS; i++) {
		int ret = snprintf(name, RTE_CRYPTODEV_NAME_MAX_LEN,
				"%s_%u", dev_name_prefix, i);

		if (ret < 0)
			return ret;

		dev = rte_cryptodev_pmd_get_named_dev(name);
		if (!dev)
			return 0;
	}

	return -1;
}

TAILQ_HEAD(cryptodev_driver_list, cryptodev_driver);

static struct cryptodev_driver_list cryptodev_driver_list =
	TAILQ_HEAD_INITIALIZER(cryptodev_driver_list);

int
rte_cryptodev_driver_id_get(const char *name)
{
	struct cryptodev_driver *driver;
	const char *driver_name;

	if (name == NULL) {
		RTE_LOG(DEBUG, CRYPTODEV, "name pointer NULL");
		return -1;
	}

	TAILQ_FOREACH(driver, &cryptodev_driver_list, next) {
		driver_name = driver->driver->name;
		if (strncmp(driver_name, name, strlen(driver_name) + 1) == 0)
			return driver->id;
	}
	return -1;
}

const char *
rte_cryptodev_name_get(uint8_t dev_id)
{
	struct rte_cryptodev *dev = rte_cryptodev_pmd_get_dev(dev_id);

	if (dev == NULL)
		return NULL;

	return dev->data->name;
}

const char *
rte_cryptodev_driver_name_get(uint8_t driver_id)
{
	struct cryptodev_driver *driver;

	TAILQ_FOREACH(driver, &cryptodev_driver_list, next)
		if (driver->id == driver_id)
			return driver->driver->name;
	return NULL;
}

uint8_t
rte_cryptodev_allocate_driver(struct cryptodev_driver *crypto_drv,
		const struct rte_driver *drv)
{
	crypto_drv->driver = drv;
	crypto_drv->id = nb_drivers;

	TAILQ_INSERT_TAIL(&cryptodev_driver_list, crypto_drv, next);

	return nb_drivers++;
}