path: root/src/plugins/dpdk/cryptodev/cryptodev.c

/*
 *------------------------------------------------------------------
 * Copyright (c) 2020 Intel and/or its affiliates.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at:
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *------------------------------------------------------------------
 */

#include <vlib/vlib.h>
#include <vnet/plugin/plugin.h>
#include <vnet/crypto/crypto.h>
#include <vnet/ipsec/ipsec.h>
#include <vpp/app/version.h>

#include <dpdk/buffer.h>
#include <dpdk/device/dpdk.h>
#include <dpdk/device/dpdk_priv.h>
#undef always_inline
#include <rte_bus_vdev.h>
#include <rte_cryptodev.h>
#include <rte_crypto_sym.h>
#include <rte_crypto.h>
#include <rte_cryptodev_pmd.h>
#include <rte_config.h>

#if CLIB_DEBUG > 0
#define always_inline static inline
#else
#define always_inline static inline __attribute__ ((__always_inline__))
#endif

#define CRYPTODEV_NB_CRYPTO_OPS 1024
#define CRYPTODEV_NB_SESSION    10240
#define CRYPTODEV_DEF_DRIVE	crypto_aesni_mb

#define CRYPTODEV_IV_OFFSET (offsetof (cryptodev_op_t, iv))
#define CRYPTODEV_AAD_OFFSET (offsetof (cryptodev_op_t, aad))

/* VNET_CRYPTO_ALGO, TYPE, DPDK_CRYPTO_ALGO, IV_LEN, TAG_LEN, AAD_LEN */
#define foreach_vnet_aead_crypto_conversion \
  _(AES_128_GCM, AEAD, AES_GCM, 12, 16, 8)  \
  _(AES_128_GCM, AEAD, AES_GCM, 12, 16, 12) \
  _(AES_192_GCM, AEAD, AES_GCM, 12, 16, 8)  \
  _(AES_192_GCM, AEAD, AES_GCM, 12, 16, 12) \
  _(AES_256_GCM, AEAD, AES_GCM, 12, 16, 8)  \
  _(AES_256_GCM, AEAD, AES_GCM, 12, 16, 12)

/**
 * crypto (alg, cryptodev_alg), hash (alg, digest-size)
 **/
#define foreach_cryptodev_link_async_alg	\
  _ (AES_128_CBC, AES_CBC, SHA1, 12)		\
  _ (AES_192_CBC, AES_CBC, SHA1, 12)		\
  _ (AES_256_CBC, AES_CBC, SHA1, 12)		\
  _ (AES_128_CBC, AES_CBC, SHA224, 14)		\
  _ (AES_192_CBC, AES_CBC, SHA224, 14)		\
  _ (AES_256_CBC, AES_CBC, SHA224, 14)		\
  _ (AES_128_CBC, AES_CBC, SHA256, 16)		\
  _ (AES_192_CBC, AES_CBC, SHA256, 16)		\
  _ (AES_256_CBC, AES_CBC, SHA256, 16)		\
  _ (AES_128_CBC, AES_CBC, SHA384, 24)		\
  _ (AES_192_CBC, AES_CBC, SHA384, 24)		\
  _ (AES_256_CBC, AES_CBC, SHA384, 24)		\
  _ (AES_128_CBC, AES_CBC, SHA512, 32)		\
  _ (AES_192_CBC, AES_CBC, SHA512, 32)		\
  _ (AES_256_CBC, AES_CBC, SHA512, 32)

#define foreach_vnet_crypto_status_conversion \
  _(SUCCESS, COMPLETED)                       \
  _(NOT_PROCESSED, WORK_IN_PROGRESS)          \
  _(AUTH_FAILED, FAIL_BAD_HMAC)               \
  _(INVALID_SESSION, FAIL_ENGINE_ERR)         \
  _(INVALID_ARGS, FAIL_ENGINE_ERR)            \
  _(ERROR, FAIL_ENGINE_ERR)

static const vnet_crypto_op_status_t cryptodev_status_conversion[] = {
#define _(a, b) VNET_CRYPTO_OP_STATUS_##b,
  foreach_vnet_crypto_status_conversion
#undef _
};

typedef struct
{
  CLIB_CACHE_LINE_ALIGN_MARK (cacheline0);
  struct rte_crypto_op op;
  struct rte_crypto_sym_op sop;
  u8 iv[16];
  u8 aad[16];
  vnet_crypto_async_frame_t *frame;
  u32 n_elts;
} cryptodev_op_t;

typedef enum
{
  CRYPTODEV_OP_TYPE_ENCRYPT = 0,
  CRYPTODEV_OP_TYPE_DECRYPT,
  CRYPTODEV_N_OP_TYPES,
} cryptodev_op_type_t;

typedef struct
{
  struct rte_cryptodev_sym_session ***keys;
} cryptodev_key_t;

typedef struct
{
  u32 dev_id;
  u32 q_id;
  char *desc;
} cryptodev_inst_t;

typedef struct
{
  CLIB_CACHE_LINE_ALIGN_MARK (cacheline0);
  struct rte_mempool *cop_pool;
  struct rte_mempool *sess_pool;
  struct rte_mempool *sess_priv_pool;
} cryptodev_numa_data_t;

typedef struct
{
  CLIB_CACHE_LINE_ALIGN_MARK (cacheline0);
  u16 cryptodev_id;
  u16 cryptodev_q;
  u32 inflight;
  cryptodev_op_t **cops;
  struct rte_ring *ring;
} cryptodev_engine_thread_t;

typedef struct
{
  cryptodev_numa_data_t *per_numa_data;
  cryptodev_key_t *keys;
  cryptodev_engine_thread_t *per_thread_data;
  enum rte_iova_mode iova_mode;
  cryptodev_inst_t *cryptodev_inst;
  clib_bitmap_t *active_cdev_inst_mask;
  clib_spinlock_t tlock;
} cryptodev_main_t;

cryptodev_main_t cryptodev_main;

static_always_inline int
prepare_aead_xform (struct rte_crypto_sym_xform *xform,
		    cryptodev_op_type_t op_type, const vnet_crypto_key_t *key,
		    u32 aad_len)
{
  struct rte_crypto_aead_xform *aead_xform = &xform->aead;
  memset (xform, 0, sizeof (*xform));
  xform->type = RTE_CRYPTO_SYM_XFORM_AEAD;
  xform->next = 0;

  if (key->alg != VNET_CRYPTO_ALG_AES_128_GCM &&
      key->alg != VNET_CRYPTO_ALG_AES_192_GCM &&
      key->alg != VNET_CRYPTO_ALG_AES_256_GCM)
    return -1;

  aead_xform->algo = RTE_CRYPTO_AEAD_AES_GCM;
  aead_xform->op = (op_type == CRYPTODEV_OP_TYPE_ENCRYPT) ?
    RTE_CRYPTO_AEAD_OP_ENCRYPT : RTE_CRYPTO_AEAD_OP_DECRYPT;
  aead_xform->aad_length = aad_len;
  aead_xform->digest_length = 16;
  aead_xform->iv.offset = CRYPTODEV_IV_OFFSET;
  aead_xform->iv.length = 12;
  aead_xform->key.data = key->data;
  aead_xform->key.length = vec_len (key->data);

  return 0;
}

static_always_inline int
prepare_linked_xform (struct rte_crypto_sym_xform *xforms,
		      cryptodev_op_type_t op_type,
		      const vnet_crypto_key_t *key)
{
  struct rte_crypto_sym_xform *xform_cipher, *xform_auth;
  vnet_crypto_key_t *key_cipher, *key_auth;
  enum rte_crypto_cipher_algorithm cipher_algo = ~0;
  enum rte_crypto_auth_algorithm auth_algo = ~0;
  u32 digest_len = ~0;

  key_cipher = vnet_crypto_get_key (key->index_crypto);
  key_auth = vnet_crypto_get_key (key->index_integ);
  if (!key_cipher || !key_auth)
    return -1;

  if (op_type == CRYPTODEV_OP_TYPE_ENCRYPT)
    {
      xform_cipher = xforms;
      xform_auth = xforms + 1;
      xform_cipher->cipher.op = RTE_CRYPTO_CIPHER_OP_ENCRYPT;
      xform_auth->auth.op = RTE_CRYPTO_AUTH_OP_GENERATE;
    }
  else
    {
      xform_cipher = xforms + 1;
      xform_auth = xforms;
      xform_cipher->cipher.op = RTE_CRYPTO_CIPHER_OP_DECRYPT;
      xform_auth->auth.op = RTE_CRYPTO_AUTH_OP_VERIFY;
    }

  xform_cipher->type = RTE_CRYPTO_SYM_XFORM_CIPHER;
  xform_auth->type = RTE_CRYPTO_SYM_XFORM_AUTH;
  xforms->next = xforms + 1;

  switch (key->async_alg)
    {
#define _(a, b, c, d) \
  case VNET_CRYPTO_ALG_##a##_##c##_TAG##d:\
    cipher_algo = RTE_CRYPTO_CIPHER_##b; \
    auth_algo = RTE_CRYPTO_AUTH_##c##_HMAC; \
    digest_len = d; \
    break;

      foreach_cryptodev_link_async_alg
#undef _
    default:
      return -1;
    }

  xform_cipher->cipher.algo = cipher_algo;
  xform_cipher->cipher.key.data = key_cipher->data;
  xform_cipher->cipher.key.length = vec_len (key_cipher->data);
  xform_cipher->cipher.iv.length = 16;
  xform_cipher->cipher.iv.offset = CRYPTODEV_IV_OFFSET;

  xform_auth->auth.algo = auth_algo;
  xform_auth->auth.digest_length = digest_len;
  xform_auth->auth.key.data = key_auth->data;
  xform_auth->auth.key.length = vec_len (key_auth->data);

  return 0;
}

static_always_inline void
cryptodev_session_del (struct rte_cryptodev_sym_session *sess)
{
  u32 n_devs, i;

  if (sess == NULL)
    return;

  n_devs = rte_cryptodev_count ();

  for (i = 0; i < n_devs; i++)
    rte_cryptodev_sym_session_clear (i, sess);

  rte_cryptodev_sym_session_free (sess);
}

static_always_inline int
cryptodev_check_supported_vnet_alg (vnet_crypto_key_t *key)
{
  vnet_crypto_alg_t alg;
  if (key->type == VNET_CRYPTO_KEY_TYPE_LINK)
    return 0;

  alg = key->alg;

#define _(a, b, c, d, e, f)	\
  if (alg == VNET_CRYPTO_ALG_##a) \
    return 0;

  foreach_vnet_aead_crypto_conversion
#undef _
    return -1;
}

static_always_inline int
cryptodev_session_create (vlib_main_t *vm, vnet_crypto_key_index_t idx,
			  u32 aad_len)
{
  cryptodev_main_t *cmt = &cryptodev_main;
  cryptodev_numa_data_t *numa_data;
  cryptodev_inst_t *dev_inst;
  vnet_crypto_key_t *key = vnet_crypto_get_key (idx);
  struct rte_mempool *sess_pool, *sess_priv_pool;
  cryptodev_key_t *ckey = vec_elt_at_index (cmt->keys, idx);
  struct rte_crypto_sym_xform xforms_enc[2] = { { 0 } };
  struct rte_crypto_sym_xform xforms_dec[2] = { { 0 } };
  struct rte_cryptodev_sym_session *sessions[CRYPTODEV_N_OP_TYPES] = { 0 };
  u32 numa_node = vm->numa_node;
  int ret;

  numa_data = vec_elt_at_index (cmt->per_numa_data, numa_node);
  sess_pool = numa_data->sess_pool;
  sess_priv_pool = numa_data->sess_priv_pool;

  sessions[CRYPTODEV_OP_TYPE_ENCRYPT] =
    rte_cryptodev_sym_session_create (sess_pool);
  if (!sessions[CRYPTODEV_OP_TYPE_ENCRYPT])
    {
      ret = -1;
      goto clear_key;
    }

  sessions[CRYPTODEV_OP_TYPE_DECRYPT] =
    rte_cryptodev_sym_session_create (sess_pool);
  if (!sessions[CRYPTODEV_OP_TYPE_DECRYPT])
    {
      ret = -1;
      goto clear_key;
    }

  if (key->type == VNET_CRYPTO_KEY_TYPE_LINK)
    ret = prepare_linked_xform (xforms_enc, CRYPTODEV_OP_TYPE_ENCRYPT, key);
  else
    ret =
      prepare_aead_xform (xforms_enc, CRYPTODEV_OP_TYPE_ENCRYPT, key, aad_len);
  if (ret)
    return 0;

  if (key->type == VNET_CRYPTO_KEY_TYPE_LINK)
    prepare_linked_xform (xforms_dec, CRYPTODEV_OP_TYPE_DECRYPT, key);
  else
    prepare_aead_xform (xforms_dec, CRYPTODEV_OP_TYPE_DECRYPT, key, aad_len);

  vec_foreach (dev_inst, cmt->cryptodev_inst)
    {
      u32 dev_id = dev_inst->dev_id;
      struct rte_cryptodev *cdev = rte_cryptodev_pmd_get_dev (dev_id);

      /* if the session is already configured for the driver type, avoid
	 configuring it again to increase the session data's refcnt */
      if (sessions[CRYPTODEV_OP_TYPE_ENCRYPT]
	    ->sess_data[cdev->driver_id]
	    .data &&
	  sessions[CRYPTODEV_OP_TYPE_DECRYPT]->sess_data[cdev->driver_id].data)
	continue;

      ret = rte_cryptodev_sym_session_init (
	dev_id, sessions[CRYPTODEV_OP_TYPE_ENCRYPT], xforms_enc,
	sess_priv_pool);
      ret = rte_cryptodev_sym_session_init (
	dev_id, sessions[CRYPTODEV_OP_TYPE_DECRYPT], xforms_dec,
	sess_priv_pool);
      if (ret < 0)
	return ret;
    }

  sessions[CRYPTODEV_OP_TYPE_ENCRYPT]->opaque_data = aad_len;
  sessions[CRYPTODEV_OP_TYPE_DECRYPT]->opaque_data = aad_len;

  CLIB_MEMORY_STORE_BARRIER ();
  ckey->keys[numa_node][CRYPTODEV_OP_TYPE_ENCRYPT] =
    sessions[CRYPTODEV_OP_TYPE_ENCRYPT];
  ckey->keys[numa_node][CRYPTODEV_OP_TYPE_DECRYPT] =
    sessions[CRYPTODEV_OP_TYPE_DECRYPT];

clear_key:
  if (ret != 0)
    {
      cryptodev_session_del (sessions[CRYPTODEV_OP_TYPE_ENCRYPT]);
      cryptodev_session_del (sessions[CRYPTODEV_OP_TYPE_DECRYPT]);
    }
  return ret;
}

static_always_inline void
cryptodev_sess_handler (vlib_main_t *vm, vnet_crypto_key_op_t kop,
			vnet_crypto_key_index_t idx, u32 aad_len)
{
  cryptodev_main_t *cmt = &cryptodev_main;
  vnet_crypto_key_t *key = vnet_crypto_get_key (idx);
  cryptodev_key_t *ckey = 0;
  u32 i;

  vec_validate (cmt->keys, idx);
  ckey = vec_elt_at_index (cmt->keys, idx);

  if (kop == VNET_CRYPTO_KEY_OP_DEL || kop == VNET_CRYPTO_KEY_OP_MODIFY)
    {
      if (idx >= vec_len (cmt->keys))
	return;

      vec_foreach_index (i, cmt->per_numa_data)
	{
	  if (ckey->keys[i][CRYPTODEV_OP_TYPE_ENCRYPT])
	    {
	      cryptodev_session_del (ckey->keys[i][CRYPTODEV_OP_TYPE_ENCRYPT]);
	      cryptodev_session_del (ckey->keys[i][CRYPTODEV_OP_TYPE_DECRYPT]);

	      CLIB_MEMORY_STORE_BARRIER ();
	      ckey->keys[i][CRYPTODEV_OP_TYPE_ENCRYPT] = 0;
	      ckey->keys[i][CRYPTODEV_OP_TYPE_DECRYPT] = 0;
	    }
	}
      return;
    }

  /* create key */

  /* do not create session for unsupported alg */
  if (cryptodev_check_supported_vnet_alg (key))
    return;

  vec_validate (ckey->keys, vec_len (cmt->per_numa_data) - 1);
  vec_foreach_index (i, ckey->keys)
    vec_validate (ckey->keys[i], CRYPTODEV_N_OP_TYPES - 1);
}

/*static*/ void
cryptodev_key_handler (vlib_main_t * vm, vnet_crypto_key_op_t kop,
		       vnet_crypto_key_index_t idx)
{
  cryptodev_sess_handler (vm, kop, idx, 8);
}

static_always_inline void
cryptodev_mark_frame_err_status (vnet_crypto_async_frame_t * f,
				 vnet_crypto_op_status_t s)
{
  u32 n_elts = f->n_elts, i;

  for (i = 0; i < n_elts; i++)
    f->elts[i].status = s;
}

static_always_inline rte_iova_t
cryptodev_get_iova (clib_pmalloc_main_t * pm, enum rte_iova_mode mode,
		    void *data)
{
  u64 index;
  if (mode == RTE_IOVA_VA)
    return (rte_iova_t) pointer_to_uword (data);

  index = clib_pmalloc_get_page_index (pm, data);
  return pointer_to_uword (data) - pm->lookup_table[index];
}

static_always_inline void
cryptodev_validate_mbuf_chain (vlib_main_t * vm, struct rte_mbuf *mb,
			       vlib_buffer_t * b)
{
  struct rte_mbuf *first_mb = mb, *last_mb = mb; /**< last mbuf */
  /* when input node is not dpdk, mbuf data len is not initialized, for
   * single buffer it is not a problem since the data length is written
   * into cryptodev operation. For chained buffer a reference data length
   * has to be computed through vlib_buffer.
   *
   * even when input node is dpdk, it is possible chained vlib_buffers
   * are updated (either added or removed a buffer) but not not mbuf fields.
   * we have to re-link every mbuf in the chain.
   */
  u16 data_len = b->current_length + (b->data + b->current_data -
				      rte_pktmbuf_mtod (mb, u8 *));

  first_mb->nb_segs = 1;
  first_mb->pkt_len = first_mb->data_len = data_len;

  while (b->flags & VLIB_BUFFER_NEXT_PRESENT)
    {
      b = vlib_get_buffer (vm, b->next_buffer);
      mb = rte_mbuf_from_vlib_buffer (b);
      if (PREDICT_FALSE ((b->flags & VLIB_BUFFER_EXT_HDR_VALID) == 0))
	rte_pktmbuf_reset (mb);
      last_mb->next = mb;
      last_mb = mb;
      mb->data_len = b->current_length;
      mb->pkt_len = b->current_length;
      mb->data_off = VLIB_BUFFER_PRE_DATA_SIZE + b->current_data;
      first_mb->nb_segs++;
      if (PREDICT_FALSE (b->ref_count > 1))
	mb->pool =
	  dpdk_no_cache_mempool_by_buffer_pool_index[b->buffer_pool_index];
    }
}

static_always_inline int
cryptodev_frame_linked_algs_enqueue (vlib_main_t * vm,
				     vnet_crypto_async_frame_t * frame,
				     cryptodev_op_type_t op_type)
{
  cryptodev_main_t *cmt = &cryptodev_main;
  clib_pmalloc_main_t *pm = vm->physmem_main.pmalloc_main;
  cryptodev_numa_data_t *numa = cmt->per_numa_data + vm->numa_node;
  cryptodev_engine_thread_t *cet = cmt->per_thread_data + vm->thread_index;
  vnet_crypto_async_frame_elt_t *fe;
  struct rte_cryptodev_sym_session *sess = 0;
  cryptodev_op_t **cop;
  u32 *bi;
  u32 n_enqueue, n_elts;
  u32 last_key_index = ~0;

  if (PREDICT_FALSE (frame == 0 || frame->n_elts == 0))
    return -1;
  n_elts = frame->n_elts;

  if (PREDICT_FALSE (CRYPTODEV_NB_CRYPTO_OPS - cet->inflight < n_elts))
    {
      cryptodev_mark_frame_err_status (frame,
				       VNET_CRYPTO_OP_STATUS_FAIL_ENGINE_ERR);
      return -1;
    }

  if (PREDICT_FALSE (rte_mempool_get_bulk (numa->cop_pool,
					   (void **) cet->cops, n_elts) < 0))
    {
      cryptodev_mark_frame_err_status (frame,
				       VNET_CRYPTO_OP_STATUS_FAIL_ENGINE_ERR);
      return -1;
    }

  cop = cet->cops;
  fe = frame->elts;
  bi = frame->buffer_indices;
  cop[0]->frame = frame;
  cop[0]->n_elts = n_elts;

  while (n_elts)
    {
      vlib_buffer_t *b = vlib_get_buffer (vm, bi[0]);
      struct rte_crypto_sym_op *sop = &cop[0]->sop;
      i16 crypto_offset = fe->crypto_start_offset;
      i16 integ_offset = fe->integ_start_offset;
      u32 offset_diff = crypto_offset - integ_offset;

      if (n_elts > 2)
	{
	  CLIB_PREFETCH (cop[1], CLIB_CACHE_LINE_BYTES * 3, STORE);
	  CLIB_PREFETCH (cop[2], CLIB_CACHE_LINE_BYTES * 3, STORE);
	  CLIB_PREFETCH (&fe[1], CLIB_CACHE_LINE_BYTES, LOAD);
	  CLIB_PREFETCH (&fe[2], CLIB_CACHE_LINE_BYTES, LOAD);
	}
      if (last_key_index != fe->key_index)
	{
	  cryptodev_key_t *key = vec_elt_at_index (cmt->keys, fe->key_index);
	  last_key_index = fe->key_index;

	  if (key->keys[vm->numa_node][op_type] == 0)
	    {
	      if (PREDICT_FALSE (
		    cryptodev_session_create (vm, last_key_index, 0) < 0))
		{
		  cryptodev_mark_frame_err_status (
		    frame, VNET_CRYPTO_OP_STATUS_FAIL_ENGINE_ERR);
		  return -1;
		}
	    }
	  sess = key->keys[vm->numa_node][op_type];
	}

      sop->m_src = rte_mbuf_from_vlib_buffer (b);
      sop->m_src->data_off = VLIB_BUFFER_PRE_DATA_SIZE;
      sop->m_dst = 0;
      /* mbuf prepend happens in the tx, but vlib_buffer happens in the nodes,
       * so we have to manually adjust mbuf data_off here so cryptodev can
       * correctly compute the data pointer. The prepend here will be later
       * rewritten by tx. */
      if (PREDICT_TRUE (fe->integ_start_offset < 0))
	{
	  sop->m_src->data_off += fe->integ_start_offset;
	  integ_offset = 0;
	  crypto_offset = offset_diff;
	}
      sop->session = sess;
      sop->cipher.data.offset = crypto_offset;
      sop->cipher.data.length = fe->crypto_total_length;
      sop->auth.data.offset = integ_offset;
      sop->auth.data.length = fe->crypto_total_length + fe->integ_length_adj;
      sop->auth.digest.data = fe->digest;
      sop->auth.digest.phys_addr = cryptodev_get_iova (pm, cmt->iova_mode,
						       fe->digest);
      if (PREDICT_FALSE (fe->flags & VNET_CRYPTO_OP_FLAG_CHAINED_BUFFERS))
	cryptodev_validate_mbuf_chain (vm, sop->m_src, b);
      else
	/* for input nodes that are not dpdk-input, it is possible the mbuf
	 * was updated before as one of the chained mbufs. Setting nb_segs
	 * to 1 here to prevent the cryptodev PMD to access potentially
	 * invalid m_src->next pointers.
	 */
	sop->m_src->nb_segs = 1;
      clib_memcpy_fast (cop[0]->iv, fe->iv, 16);
      cop++;
      bi++;
      fe++;
      n_elts--;
    }

  n_enqueue = rte_cryptodev_enqueue_burst (cet->cryptodev_id,
					   cet->cryptodev_q,
					   (struct rte_crypto_op **)
					   cet->cops, frame->n_elts);
  ASSERT (n_enqueue == frame->n_elts);
  cet->inflight += n_enqueue;

  return 0;
}

static_always_inline int
cryptodev_frame_gcm_enqueue (vlib_main_t * vm,
			     vnet_crypto_async_frame_t * frame,
			     cryptodev_op_type_t op_type, u8 aad_len)
{
  cryptodev_main_t *cmt = &cryptodev_main;
  clib_pmalloc_main_t *pm = vm->physmem_main.pmalloc_main;
  cryptodev_numa_data_t *numa = cmt->per_numa_data + vm->numa_node;
  cryptodev_engine_thread_t *cet = cmt->per_thread_data + vm->thread_index;
  vnet_crypto_async_frame_elt_t *fe;
  struct rte_cryptodev_sym_session *sess = 0;
  cryptodev_op_t **cop;
  u32 *bi;
  u32 n_enqueue = 0, n_elts;
  u32 last_key_index = ~0;

  if (PREDICT_FALSE (frame == 0 || frame->n_elts == 0))
    return -1;
  n_elts = frame->n_elts;

  if (PREDICT_FALSE (CRYPTODEV_NB_CRYPTO_OPS - cet->inflight < n_elts))
    {
      cryptodev_mark_frame_err_status (frame,
				       VNET_CRYPTO_OP_STATUS_FAIL_ENGINE_ERR);
      return -1;
    }

  if (PREDICT_FALSE (rte_mempool_get_bulk (numa->cop_pool,
					   (void **) cet->cops, n_elts) < 0))
    {
      cryptodev_mark_frame_err_status (frame,
				       VNET_CRYPTO_OP_STATUS_FAIL_ENGINE_ERR);
      return -1;
    }

  cop = cet->cops;
  fe = frame->elts;
  bi = frame->buffer_indices;
  cop[0]->frame = frame;
  cop[0]->n_elts = n_elts;

  while (n_elts)
    {
      vlib_buffer_t *b = vlib_get_buffer (vm, bi[0]);
      struct rte_crypto_sym_op *sop = &cop[0]->sop;
      u16 crypto_offset = fe->crypto_start_offset;

      if (n_elts > 2)
	{
	  CLIB_PREFETCH (cop[1], CLIB_CACHE_LINE_BYTES * 3, STORE);
	  CLIB_PREFETCH (cop[2], CLIB_CACHE_LINE_BYTES * 3, STORE);
	  CLIB_PREFETCH (&fe[1], CLIB_CACHE_LINE_BYTES, LOAD);
	  CLIB_PREFETCH (&fe[2], CLIB_CACHE_LINE_BYTES, LOAD);
	}
      if (last_key_index != fe->key_index)
	{
	  cryptodev_key_t *key = vec_elt_at_index (cmt->keys, fe->key_index);

	  last_key_index = fe->key_index;
	  if (key->keys[vm->numa_node][op_type] == 0)
	    {
	      if (PREDICT_FALSE (cryptodev_session_create (vm, last_key_index,
							   aad_len) < 0))
		{
		  cryptodev_mark_frame_err_status (
		    frame, VNET_CRYPTO_OP_STATUS_FAIL_ENGINE_ERR);
		  return -1;
		}
	    }
	  else if (PREDICT_FALSE (
		     key->keys[vm->numa_node][op_type]->opaque_data !=
		     aad_len))
	    {
	      cryptodev_sess_handler (vm, VNET_CRYPTO_KEY_OP_DEL,
				      fe->key_index, aad_len);
	      if (PREDICT_FALSE (cryptodev_session_create (vm, last_key_index,
							   aad_len) < 0))
		{
		  cryptodev_mark_frame_err_status (
		    frame, VNET_CRYPTO_OP_STATUS_FAIL_ENGINE_ERR);
		  return -1;
		}
	    }

	  sess = key->keys[vm->numa_node][op_type];
	}

      sop->m_src = rte_mbuf_from_vlib_buffer (b);
      sop->m_dst = 0;
      /* mbuf prepend happens in the tx, but vlib_buffer happens in the nodes,
       * so we have to manually adjust mbuf data_off here so cryptodev can
       * correctly compute the data pointer. The prepend here will be later
       * rewritten by tx. */
      if (PREDICT_FALSE (fe->crypto_start_offset < 0))
	{
	  rte_pktmbuf_prepend (sop->m_src, -fe->crypto_start_offset);
	  crypto_offset = 0;
	}

      sop->session = sess;
      sop->aead.aad.data = cop[0]->aad;
      sop->aead.aad.phys_addr = cop[0]->op.phys_addr + CRYPTODEV_AAD_OFFSET;
      sop->aead.data.length = fe->crypto_total_length;
      sop->aead.data.offset = crypto_offset;
      sop->aead.digest.data = fe->tag;
      sop->aead.digest.phys_addr = cryptodev_get_iova (pm, cmt->iova_mode,
						       fe->tag);
      if (PREDICT_FALSE (fe->flags & VNET_CRYPTO_OP_FLAG_CHAINED_BUFFERS))
	cryptodev_validate_mbuf_chain (vm, sop->m_src, b);
      else
	/* for input nodes that are not dpdk-input, it is possible the mbuf
	 * was updated before as one of the chained mbufs. Setting nb_segs
	 * to 1 here to prevent the cryptodev PMD to access potentially
	 * invalid m_src->next pointers.
	 */
	sop->m_src->nb_segs = 1;
      clib_memcpy_fast (cop[0]->iv, fe->iv, 12);
      clib_memcpy_fast (cop[0]->aad, fe->aad, aad_len);
      cop++;
      bi++;
      fe++;
      n_elts--;
    }

  n_enqueue = rte_cryptodev_enqueue_burst (cet->cryptodev_id,
					   cet->cryptodev_q,
					   (struct rte_crypto_op **)
					   cet->cops, frame->n_elts);
  ASSERT (n_enqueue == frame->n_elts);
  cet->inflight += n_enqueue;

  return 0;
}

static_always_inline cryptodev_op_t *
cryptodev_get_ring_head (struct rte_ring * ring)
{
  cryptodev_op_t **r = (void *) &ring[1];
  return r[ring->cons.head & ring->mask];
}

static_always_inline vnet_crypto_async_frame_t *
cryptodev_frame_dequeue (vlib_main_t * vm, u32 * nb_elts_processed,
			 u32 * enqueue_thread_idx)
{
  cryptodev_main_t *cmt = &cryptodev_main;
  cryptodev_numa_data_t *numa = cmt->per_numa_data + vm->numa_node;
  cryptodev_engine_thread_t *cet = cmt->per_thread_data + vm->thread_index;
  cryptodev_op_t *cop0, **cop = cet->cops;
  vnet_crypto_async_frame_elt_t *fe;
  vnet_crypto_async_frame_t *frame;
  u32 n_elts, n_completed_ops = rte_ring_count (cet->ring);
  u32 ss0 = 0, ss1 = 0, ss2 = 0, ss3 = 0;	/* sum of status */

  if (cet->inflight)
    {
      n_elts = clib_min (CRYPTODEV_NB_CRYPTO_OPS - n_completed_ops,
			 VNET_CRYPTO_FRAME_SIZE);
      n_elts = rte_cryptodev_dequeue_burst
	(cet->cryptodev_id, cet->cryptodev_q,
	 (struct rte_crypto_op **) cet->cops, n_elts);
      cet->inflight -= n_elts;
      n_completed_ops += n_elts;

      rte_ring_sp_enqueue_burst (cet->ring, (void *) cet->cops, n_elts, NULL);
    }

  if (PREDICT_FALSE (n_completed_ops == 0))
    return 0;

  cop0 = cryptodev_get_ring_head (cet->ring);
  /* not a single frame is finished */
  if (PREDICT_FALSE (cop0->n_elts > rte_ring_count (cet->ring)))
    return 0;

  frame = cop0->frame;
  n_elts = cop0->n_elts;
  n_elts = rte_ring_sc_dequeue_bulk (cet->ring, (void **) cet->cops,
				     n_elts, 0);
  fe = frame->elts;

  while (n_elts > 4)
    {
      ss0 |= fe[0].status = cryptodev_status_conversion[cop[0]->op.status];
      ss1 |= fe[1].status = cryptodev_status_conversion[cop[1]->op.status];
      ss2 |= fe[2].status = cryptodev_status_conversion[cop[2]->op.status];
      ss3 |= fe[3].status = cryptodev_status_conversion[cop[3]->op.status];

      cop += 4;
      fe += 4;
      n_elts -= 4;
    }

  while (n_elts)
    {
      ss0 |= fe[0].status = cryptodev_status_conversion[cop[0]->op.status];
      fe++;
      cop++;
      n_elts--;
    }

  frame->state = (ss0 | ss1 | ss2 | ss3) == VNET_CRYPTO_OP_STATUS_COMPLETED ?
    VNET_CRYPTO_FRAME_STATE_SUCCESS : VNET_CRYPTO_FRAME_STATE_ELT_ERROR;

  rte_mempool_put_bulk (numa->cop_pool, (void **) cet->cops, frame->n_elts);
  *nb_elts_processed = frame->n_elts;
  *enqueue_thread_idx = frame->enqueue_thread_index;
  return frame;
}

/* *INDENT-OFF* */
static_always_inline int
cryptodev_enqueue_gcm_aad_8_enc (vlib_main_t * vm,
				 vnet_crypto_async_frame_t * frame)
{
  return cryptodev_frame_gcm_enqueue (vm, frame,
				      CRYPTODEV_OP_TYPE_ENCRYPT, 8);
}
static_always_inline int
cryptodev_enqueue_gcm_aad_12_enc (vlib_main_t * vm,
				 vnet_crypto_async_frame_t * frame)
{
  return cryptodev_frame_gcm_enqueue (vm, frame,
				      CRYPTODEV_OP_TYPE_ENCRYPT, 12);
}

static_always_inline int
cryptodev_enqueue_gcm_aad_8_dec (vlib_main_t * vm,
				 vnet_crypto_async_frame_t * frame)
{
  return cryptodev_frame_gcm_enqueue (vm, frame,
				      CRYPTODEV_OP_TYPE_DECRYPT, 8);
}
static_always_inline int
cryptodev_enqueue_gcm_aad_12_dec (vlib_main_t * vm,
				 vnet_crypto_async_frame_t * frame)
{
  return cryptodev_frame_gcm_enqueue (vm, frame,
				      CRYPTODEV_OP_TYPE_DECRYPT, 12);
}

static_always_inline int
cryptodev_enqueue_linked_alg_enc (vlib_main_t * vm,
				  vnet_crypto_async_frame_t * frame)
{
  return cryptodev_frame_linked_algs_enqueue (vm, frame,
					      CRYPTODEV_OP_TYPE_ENCRYPT);
}

static_always_inline int
cryptodev_enqueue_linked_alg_dec (vlib_main_t * vm,
				  vnet_crypto_async_frame_t * frame)
{
  return cryptodev_frame_linked_algs_enqueue (vm, frame,
					      CRYPTODEV_OP_TYPE_DECRYPT);
}

typedef enum
{
  CRYPTODEV_RESOURCE_ASSIGN_AUTO = 0,
  CRYPTODEV_RESOURCE_ASSIGN_UPDATE,
} cryptodev_resource_assign_op_t;

/**
 *  assign a cryptodev resource to a worker.
 *  @param cet: the worker thread data
 *  @param cryptodev_inst_index: if op is "ASSIGN_AUTO" this param is ignored.
 *  @param op: the assignment method.
 *  @return: 0 if successfully, negative number otherwise.
 **/
static_always_inline int
cryptodev_assign_resource (cryptodev_engine_thread_t * cet,
			   u32 cryptodev_inst_index,
			   cryptodev_resource_assign_op_t op)
{
  cryptodev_main_t *cmt = &cryptodev_main;
  cryptodev_inst_t *cinst = 0;
  uword idx;

  /* assign resource is only allowed when no inflight op is in the queue */
  if (cet->inflight)
    return -EBUSY;

  switch (op)
    {
    case CRYPTODEV_RESOURCE_ASSIGN_AUTO:
      if (clib_bitmap_count_set_bits (cmt->active_cdev_inst_mask) >=
	  vec_len (cmt->cryptodev_inst))
	return -1;

      clib_spinlock_lock (&cmt->tlock);
      idx = clib_bitmap_first_clear (cmt->active_cdev_inst_mask);
      clib_bitmap_set (cmt->active_cdev_inst_mask, idx, 1);
      cinst = vec_elt_at_index (cmt->cryptodev_inst, idx);
      cet->cryptodev_id = cinst->dev_id;
      cet->cryptodev_q = cinst->q_id;
      clib_spinlock_unlock (&cmt->tlock);
      break;
    case CRYPTODEV_RESOURCE_ASSIGN_UPDATE:
      /* assigning a used cryptodev resource is not allowed */
      if (clib_bitmap_get (cmt->active_cdev_inst_mask, cryptodev_inst_index)
	  == 1)
	return -EBUSY;
      vec_foreach_index (idx, cmt->cryptodev_inst)
      {
	cinst = cmt->cryptodev_inst + idx;
	if (cinst->dev_id == cet->cryptodev_id &&
	    cinst->q_id == cet->cryptodev_q)
	  break;
      }
      /* invalid existing worker resource assignment */
      if (idx == vec_len (cmt->cryptodev_inst))
	return -EINVAL;
      clib_spinlock_lock (&cmt->tlock);
      clib_bitmap_set_no_check (cmt->active_cdev_inst_mask, idx, 0);
      clib_bitmap_set_no_check (cmt->active_cdev_inst_mask,
				cryptodev_inst_index, 1);
      cinst = cmt->cryptodev_inst + cryptodev_inst_index;
      cet->cryptodev_id = cinst->dev_id;
      cet->cryptodev_q = cinst->q_id;
      clib_spinlock_unlock (&cmt->tlock);
      break;
    default:
      return -EINVAL;
    }
  return 0;
}

static u8 *
format_cryptodev_inst (u8 * s, va_list * args)
{
  cryptodev_main_t *cmt = &cryptodev_main;
  u32 inst = va_arg (*args, u32);
  cryptodev_inst_t *cit = cmt->cryptodev_inst + inst;
  u32 thread_index = 0;
  struct rte_cryptodev_info info;

  rte_cryptodev_info_get (cit->dev_id, &info);
  s = format (s, "%-25s%-10u", info.device->name, cit->q_id);

  vec_foreach_index (thread_index, cmt->per_thread_data)
  {
    cryptodev_engine_thread_t *cet = cmt->per_thread_data + thread_index;
    if (vlib_num_workers () > 0 && thread_index == 0)
      continue;

    if (cet->cryptodev_id == cit->dev_id && cet->cryptodev_q == cit->q_id)
      {
	s = format (s, "%u (%v)\n", thread_index,
		    vlib_worker_threads[thread_index].name);
	break;
      }
  }

  if (thread_index == vec_len (cmt->per_thread_data))
    s = format (s, "%s\n", "free");

  return s;
}

static clib_error_t *
cryptodev_show_assignment_fn (vlib_main_t * vm, unformat_input_t * input,
			      vlib_cli_command_t * cmd)
{
  cryptodev_main_t *cmt = &cryptodev_main;
  u32 inst;

  vlib_cli_output (vm, "%-5s%-25s%-10s%s\n", "No.", "Name", "Queue-id",
		   "Assigned-to");
  if (vec_len (cmt->cryptodev_inst) == 0)
    {
      vlib_cli_output (vm, "(nil)\n");
      return 0;
    }

  vec_foreach_index (inst, cmt->cryptodev_inst)
    vlib_cli_output (vm, "%-5u%U", inst, format_cryptodev_inst, inst);

  return 0;
}

VLIB_CLI_COMMAND (show_cryptodev_assignment, static) = {
    .path = "show cryptodev assignment",
    .short_help = "show cryptodev assignment",
    .function = cryptodev_show_assignment_fn,
};

static clib_error_t *
cryptodev_set_assignment_fn (vlib_main_t * vm, unformat_input_t * input,
			     vlib_cli_command_t * cmd)
{
  cryptodev_main_t *cmt = &cryptodev_main;
  cryptodev_engine_thread_t *cet;
  unformat_input_t _line_input, *line_input = &_line_input;
  u32 thread_index, inst_index;
  u32 thread_present = 0, inst_present = 0;
  clib_error_t *error = 0;
  int ret;

  /* Get a line of input. */
  if (!unformat_user (input, unformat_line_input, line_input))
    return 0;

  while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
    {
      if (unformat (line_input, "thread %u", &thread_index))
	thread_present = 1;
      else if (unformat (line_input, "resource %u", &inst_index))
	inst_present = 1;
      else
	{
	  error = clib_error_return (0, "unknown input `%U'",
				     format_unformat_error, line_input);
	  return error;
	}
    }

  if (!thread_present || !inst_present)
    {
      error = clib_error_return (0, "mandatory argument(s) missing");
      return error;
    }

  if (thread_index == 0 && vlib_num_workers () > 0)
    {
      error =
	clib_error_return (0, "assign crypto resource for master thread");
      return error;
    }

  if (thread_index > vec_len (cmt->per_thread_data) ||
      inst_index > vec_len (cmt->cryptodev_inst))
    {
      error = clib_error_return (0, "wrong thread id or resource id");
      return error;
    }

  cet = cmt->per_thread_data + thread_index;
  ret = cryptodev_assign_resource (cet, inst_index,
				   CRYPTODEV_RESOURCE_ASSIGN_UPDATE);
  if (ret)
    {
      error = clib_error_return (0, "cryptodev_assign_resource returned %i",
				 ret);
      return error;
    }

  return 0;
}

VLIB_CLI_COMMAND (set_cryptodev_assignment, static) = {
    .path = "set cryptodev assignment",
    .short_help = "set cryptodev assignment thread <thread_index> "
	"resource <inst_index>",
    .function = cryptodev_set_assignment_fn,
};

static int
check_cryptodev_alg_support (u32 dev_id)
{
  const struct rte_cryptodev_symmetric_capability *cap;
  struct rte_cryptodev_sym_capability_idx cap_idx;

#define _(a, b, c, d, e, f) \
  cap_idx.type = RTE_CRYPTO_SYM_XFORM_##b; \
  cap_idx.algo.aead = RTE_CRYPTO_##b##_##c; \
  cap = rte_cryptodev_sym_capability_get (dev_id, &cap_idx); \
  if (!cap) \
    return -RTE_CRYPTO_##b##_##c; \
  else \
    { \
      if (cap->aead.digest_size.min > e || cap->aead.digest_size.max < e) \
	return -RTE_CRYPTO_##b##_##c; \
      if (cap->aead.aad_size.min > f || cap->aead.aad_size.max < f) \
	return -RTE_CRYPTO_##b##_##c; \
      if (cap->aead.iv_size.min > d || cap->aead.iv_size.max < d) \
	return -RTE_CRYPTO_##b##_##c; \
    }

  foreach_vnet_aead_crypto_conversion
#undef _

#define _(a, b, c, d) \
  cap_idx.type = RTE_CRYPTO_SYM_XFORM_CIPHER; \
  cap_idx.algo.cipher = RTE_CRYPTO_CIPHER_##b; \
  cap = rte_cryptodev_sym_capability_get (dev_id, &cap_idx); \
  if (!cap) \
    return -RTE_CRYPTO_CIPHER_##b; \
  cap_idx.type = RTE_CRYPTO_SYM_XFORM_AUTH; \
  cap_idx.algo.auth = RTE_CRYPTO_AUTH_##c##_HMAC; \
  cap = rte_cryptodev_sym_capability_get (dev_id, &cap_idx); \
  if (!cap) \
    return -RTE_CRYPTO_AUTH_##c;

  foreach_cryptodev_link_async_alg
#undef _
    return 0;
}

static u32
cryptodev_count_queue (u32 numa)
{
  struct rte_cryptodev_info info;
  u32 n_cryptodev = rte_cryptodev_count ();
  u32 i, q_count = 0;

  for (i = 0; i < n_cryptodev; i++)
    {
      rte_cryptodev_info_get (i, &info);

      /* only device support symmetric crypto is used */
      if (!(info.feature_flags & RTE_CRYPTODEV_FF_SYMMETRIC_CRYPTO))
	continue;
      q_count += info.max_nb_queue_pairs;
    }

  return q_count;
}

static int
cryptodev_configure (vlib_main_t *vm, uint32_t cryptodev_id)
{
  struct rte_cryptodev_info info;
  struct rte_cryptodev *cdev;
  cryptodev_main_t *cmt = &cryptodev_main;
  u32 i;
  int ret;

  rte_cryptodev_info_get (cryptodev_id, &info);

  /* do not configure the device that does not support symmetric crypto */
  if (!(info.feature_flags & RTE_CRYPTODEV_FF_SYMMETRIC_CRYPTO))
    return 0;

  ret = check_cryptodev_alg_support (cryptodev_id);
  if (ret != 0)
    return ret;

  cdev = rte_cryptodev_pmd_get_dev (cryptodev_id);
  /** If the device is already started, we reuse it, otherwise configure
   *  both the device and queue pair.
   **/
  if (!cdev->data->dev_started)
    {
      struct rte_cryptodev_config cfg;

      cfg.socket_id = info.device->numa_node;
      cfg.nb_queue_pairs = info.max_nb_queue_pairs;

      rte_cryptodev_configure (cryptodev_id, &cfg);

      for (i = 0; i < info.max_nb_queue_pairs; i++)
	{
	  struct rte_cryptodev_qp_conf qp_cfg;

	  int ret;

	  qp_cfg.mp_session = 0;
	  qp_cfg.mp_session_private = 0;
	  qp_cfg.nb_descriptors = CRYPTODEV_NB_CRYPTO_OPS;

	  ret = rte_cryptodev_queue_pair_setup (cryptodev_id, i, &qp_cfg,
						info.device->numa_node);
	  if (ret)
	    break;
	}
      if (i != info.max_nb_queue_pairs)
	return -1;
      /* start the device */
      rte_cryptodev_start (i);
    }

  for (i = 0; i < cdev->data->nb_queue_pairs; i++)
    {
      cryptodev_inst_t *cdev_inst;
      vec_add2(cmt->cryptodev_inst, cdev_inst, 1);
      cdev_inst->desc = vec_new (char, strlen (info.device->name) + 10);
      cdev_inst->dev_id = cryptodev_id;
      cdev_inst->q_id = i;

      snprintf (cdev_inst->desc, strlen (info.device->name) + 9,
		"%s_q%u", info.device->name, i);
    }

  return 0;
}

static int
cryptodev_cmp (void *v1, void *v2)
{
  cryptodev_inst_t *a1 = v1;
  cryptodev_inst_t *a2 = v2;

  if (a1->q_id > a2->q_id)
    return 1;
  if (a1->q_id < a2->q_id)
    return -1;
  return 0;
}

static int
cryptodev_probe (vlib_main_t *vm, u32 n_workers)
{
  cryptodev_main_t *cmt = &cryptodev_main;
  u32 n_queues = cryptodev_count_queue (vm->numa_node);
  u32 i;
  int ret;

  /* If there is not enough queues, exit */
  if (n_queues < n_workers)
      return -1;

  for (i = 0; i < rte_cryptodev_count (); i++)
    {
      ret = cryptodev_configure (vm, i);
      if (ret)
	return ret;
    }

  vec_sort_with_function(cmt->cryptodev_inst, cryptodev_cmp);

  return 0;
}

static int
cryptodev_get_session_sz (vlib_main_t *vm, uint32_t n_workers)
{
  u32 sess_data_sz = 0, i;

  if (rte_cryptodev_count () == 0)
    return -1;

  for (i = 0; i < rte_cryptodev_count (); i++)
    {
      u32 dev_sess_sz = rte_cryptodev_sym_get_private_session_size (i);

      sess_data_sz = dev_sess_sz > sess_data_sz ? dev_sess_sz : sess_data_sz;
    }

  return sess_data_sz;
}

static void
dpdk_disable_cryptodev_engine (vlib_main_t * vm)
{
  cryptodev_main_t *cmt = &cryptodev_main;
  cryptodev_numa_data_t *numa_data;

  vec_validate (cmt->per_numa_data, vm->numa_node);
  numa_data = vec_elt_at_index (cmt->per_numa_data, vm->numa_node);

  if (numa_data->sess_pool)
    rte_mempool_free (numa_data->sess_pool);
  if (numa_data->sess_priv_pool)
    rte_mempool_free (numa_data->sess_priv_pool);
  if (numa_data->cop_pool)
    rte_mempool_free (numa_data->cop_pool);
}

static void
crypto_op_init (struct rte_mempool *mempool,
		void *_arg __attribute__ ((unused)),
		void *_obj, unsigned i __attribute__ ((unused)))
{
  struct rte_crypto_op *op = _obj;

  op->sess_type = RTE_CRYPTO_OP_WITH_SESSION;
  op->type = RTE_CRYPTO_OP_TYPE_SYMMETRIC;
  op->status = RTE_CRYPTO_OP_STATUS_NOT_PROCESSED;
  op->phys_addr = rte_mempool_virt2iova (_obj);
  op->mempool = mempool;
}


clib_error_t *
dpdk_cryptodev_init (vlib_main_t * vm)
{
  cryptodev_main_t *cmt = &cryptodev_main;
  vlib_thread_main_t *tm = vlib_get_thread_main ();
  cryptodev_engine_thread_t *ptd;
  cryptodev_numa_data_t *numa_data;
  struct rte_mempool *mp;
  u32 skip_master = vlib_num_workers () > 0;
  u32 n_workers = tm->n_vlib_mains - skip_master;
  u32 numa = vm->numa_node;
  i32 sess_sz;
  u64 n_cop_elts;
  u32 eidx;
  u32 i;
  u8 *name = 0;
  clib_error_t *error;
  struct rte_crypto_op_pool_private *priv;

  cmt->iova_mode = rte_eal_iova_mode ();

  sess_sz = cryptodev_get_session_sz(vm, n_workers);
  if (sess_sz < 0)
    {
      error = clib_error_return (0, "Not enough cryptodevs");
      return error;
    }

  /* A total of 4 times n_worker threads * frame size as crypto ops */
  n_cop_elts = max_pow2 ((u64)n_workers * CRYPTODEV_NB_CRYPTO_OPS);

  /* probe all cryptodev devices and get queue info */
  if (cryptodev_probe (vm, n_workers) < 0)
    {
      error = clib_error_return (0, "Failed to configure cryptodev");
      goto err_handling;
    }

  clib_bitmap_vec_validate (cmt->active_cdev_inst_mask, tm->n_vlib_mains);
  clib_spinlock_init (&cmt->tlock);

  vec_validate_aligned(cmt->per_thread_data, tm->n_vlib_mains - 1,
		       CLIB_CACHE_LINE_BYTES);
  for (i = skip_master; i < tm->n_vlib_mains; i++)
    {
      ptd = cmt->per_thread_data + i;

      cryptodev_assign_resource (ptd, 0, CRYPTODEV_RESOURCE_ASSIGN_AUTO);
      name = format (0, "frames_ring_%u%c", i, 0);
      ptd->ring = rte_ring_create((char *) name, CRYPTODEV_NB_CRYPTO_OPS,
                                  vm->numa_node, RING_F_SP_ENQ|RING_F_SC_DEQ);
      if (!ptd->ring)
	{
	  error = clib_error_return (0, "Not enough memory for mp %s", name);
	  vec_free (name);
	  goto err_handling;
	}
      vec_validate (ptd->cops, VNET_CRYPTO_FRAME_SIZE - 1);
      vec_free(name);

      numa = vlib_mains[i]->numa_node;

      vec_validate (cmt->per_numa_data, numa);
      numa_data = vec_elt_at_index (cmt->per_numa_data, numa);

      if (numa_data->sess_pool)
	continue;

      /* create session pool for the numa node */
      name = format (0, "vcryptodev_sess_pool_%u%c", numa, 0);
      mp = rte_cryptodev_sym_session_pool_create (
	(char *) name, CRYPTODEV_NB_SESSION, 0, 0, 0, numa);
      if (!mp)
	{
	  error = clib_error_return (0, "Not enough memory for mp %s", name);
	  goto err_handling;
	}
      vec_free (name);

      numa_data->sess_pool = mp;

      /* create session private pool for the numa node */
      name = format (0, "cryptodev_sess_pool_%u%c", numa, 0);
      mp = rte_mempool_create ((char *) name, CRYPTODEV_NB_SESSION, sess_sz, 0,
			       0, NULL, NULL, NULL, NULL, numa, 0);
      if (!mp)
	{
	  error = clib_error_return (0, "Not enough memory for mp %s", name);
	  vec_free (name);
	  goto err_handling;
	}

      vec_free (name);

      numa_data->sess_priv_pool = mp;

      /* create cryptodev op pool */
      name = format (0, "cryptodev_op_pool_%u%c", numa, 0);

      mp = rte_mempool_create ((char *) name, n_cop_elts,
			       sizeof (cryptodev_op_t), VLIB_FRAME_SIZE * 2,
			       sizeof (struct rte_crypto_op_pool_private),
			       NULL, NULL, crypto_op_init, NULL, numa, 0);
      if (!mp)
	{
	  error = clib_error_return (0, "Not enough memory for mp %s", name);
	  vec_free (name);
	  goto err_handling;
	}

      priv = rte_mempool_get_priv (mp);
      priv->priv_size = sizeof (struct rte_crypto_op_pool_private);
      priv->type = RTE_CRYPTO_OP_TYPE_SYMMETRIC;
      vec_free (name);
      numa_data->cop_pool = mp;
    }

  /* register handler */
  eidx = vnet_crypto_register_engine (vm, "dpdk_cryptodev", 100,
				      "DPDK Cryptodev Engine");

#define _(a, b, c, d, e, f) \
  vnet_crypto_register_async_handler \
    (vm, eidx, VNET_CRYPTO_OP_##a##_TAG##e##_AAD##f##_ENC, \
	cryptodev_enqueue_gcm_aad_##f##_enc,\
	cryptodev_frame_dequeue); \
  vnet_crypto_register_async_handler \
    (vm, eidx, VNET_CRYPTO_OP_##a##_TAG##e##_AAD##f##_DEC, \
	cryptodev_enqueue_gcm_aad_##f##_dec, \
	cryptodev_frame_dequeue);

  foreach_vnet_aead_crypto_conversion
#undef _

#define _(a, b, c, d) \
  vnet_crypto_register_async_handler \
    (vm, eidx, VNET_CRYPTO_OP_##a##_##c##_TAG##d##_ENC, \
	cryptodev_enqueue_linked_alg_enc, \
	cryptodev_frame_dequeue); \
  vnet_crypto_register_async_handler \
    (vm, eidx, VNET_CRYPTO_OP_##a##_##c##_TAG##d##_DEC, \
	cryptodev_enqueue_linked_alg_dec, \
	cryptodev_frame_dequeue);

    foreach_cryptodev_link_async_alg
#undef _

  vnet_crypto_register_key_handler (vm, eidx, cryptodev_key_handler);

  /* this engine is only enabled when cryptodev device(s) are presented in
   * startup.conf. Assume it is wanted to be used, turn on async mode here.
   */
  vnet_crypto_request_async_mode (1);
  ipsec_set_async_mode (1);

  return 0;

err_handling:
  dpdk_disable_cryptodev_engine (vm);

  return error;
}
/* *INDENT-On* */

/*
 * fd.io coding-style-patch-verification: ON
 *
 * Local Variables:
 * eval: (c-set-style "gnu")
 * End:
 */