cryptodev.c

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/*
 *------------------------------------------------------------------
 * 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/vnet.h>
#include <vpp/app/version.h>

#include <dpdk/buffer.h>
#include <dpdk/device/dpdk.h>
#include <dpdk/device/dpdk_priv.h>
#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>

#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))
#define CRYPTODEV_DIGEST_OFFSET (offsetof (cryptodev_op_t, digest))

/* 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_N_OP_TYPES];
} cryptodev_key_t;

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

typedef struct
{
  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;
  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 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 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 int
cryptodev_session_create (vnet_crypto_key_t * const key,
                          struct rte_mempool *sess_priv_pool,
                          cryptodev_key_t * session_pair, u32 aad_len)
{
  struct rte_crypto_sym_xform xforms_enc[2] = { {0} };
  struct rte_crypto_sym_xform xforms_dec[2] = { {0} };
  cryptodev_main_t *cmt = &cryptodev_main;
  cryptodev_inst_t *dev_inst;
  struct rte_cryptodev *cdev;
  int ret;
  uint8_t dev_id = 0;

  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)
  {
    dev_id = dev_inst->dev_id;
    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 (session_pair->keys[0]->sess_data[cdev->driver_id].data &&
        session_pair->keys[1]->sess_data[cdev->driver_id].data)
      continue;

    ret = rte_cryptodev_sym_session_init (dev_id, session_pair->keys[0],
                                          xforms_enc, sess_priv_pool);
    ret = rte_cryptodev_sym_session_init (dev_id, session_pair->keys[1],
                                          xforms_dec, sess_priv_pool);
    if (ret < 0)
      return ret;
  }
  session_pair->keys[0]->opaque_data = aad_len;
  session_pair->keys[1]->opaque_data = aad_len;

  return 0;
}

static 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 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 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;
  cryptodev_numa_data_t *numa_data;
  vnet_crypto_key_t *key = vnet_crypto_get_key (idx);
  struct rte_mempool *sess_pool, *sess_priv_pool;
  cryptodev_key_t *ckey = 0;
  int ret = 0;

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

      ckey = pool_elt_at_index (cmt->keys, idx);
      cryptodev_session_del (ckey->keys[0]);
      cryptodev_session_del (ckey->keys[1]);
      ckey->keys[0] = 0;
      ckey->keys[1] = 0;
      pool_put (cmt->keys, ckey);
      return;
    }
  else if (kop == VNET_CRYPTO_KEY_OP_MODIFY)
    {
      if (idx >= vec_len (cmt->keys))
        return;

      ckey = pool_elt_at_index (cmt->keys, idx);

      cryptodev_session_del (ckey->keys[0]);
      cryptodev_session_del (ckey->keys[1]);
      ckey->keys[0] = 0;
      ckey->keys[1] = 0;
    }
  else                          /* create key */
    pool_get_zero (cmt->keys, ckey);

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

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

  ckey->keys[0] = rte_cryptodev_sym_session_create (sess_pool);
  if (!ckey->keys[0])
    {
      ret = -1;
      goto clear_key;
    }

  ckey->keys[1] = rte_cryptodev_sym_session_create (sess_pool);
  if (!ckey->keys[1])
    {
      ret = -1;
      goto clear_key;
    }

  ret = cryptodev_session_create (key, sess_priv_pool, ckey, aad_len);

clear_key:
  if (ret != 0)
    {
      cryptodev_session_del (ckey->keys[0]);
      cryptodev_session_del (ckey->keys[1]);
      memset (ckey, 0, sizeof (*ckey));
      pool_put (cmt->keys, ckey);
    }
}

/*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;
  f->state = VNET_CRYPTO_FRAME_STATE_ELT_ERROR;
}

/* when vlib_buffer in chain is adjusted mbuf is not adjusted along, this
 * function does that */
static_always_inline rte_iova_t
cryptodev_validate_mbuf_chain (vlib_main_t * vm, struct rte_mbuf *mb,
                               vlib_buffer_t * b, u8 * digest)
{
  rte_iova_t digest_iova = 0;
  struct rte_mbuf *first_mb = mb, *last_mb = mb; /**< last mbuf */

  first_mb->nb_segs = 1;

  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];

      if (b->data <= digest &&
          b->data + b->current_data + b->current_length > digest)
        digest_iova = rte_pktmbuf_iova (mb) + digest -
          rte_pktmbuf_mtod (mb, u8 *);
    }

  return digest_iova;
}

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,
                                     u32 digest_len)
{
  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;
  vnet_crypto_async_frame_elt_t *fe;
  cryptodev_op_t **cop;
  u32 *bi;
  u32 n_enqueue, n_elts;
  cryptodev_key_t *key;
  u32 last_key_index;

  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;

  key = pool_elt_at_index (cmt->keys, fe->key_index);
  last_key_index = fe->key_index;

  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)
        {
          key = pool_elt_at_index (cmt->keys, fe->key_index);
          last_key_index = fe->key_index;
        }

      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_TRUE (fe->integ_start_offset < 0))
        {
          rte_pktmbuf_prepend (sop->m_src, -fe->integ_start_offset);
          integ_offset = 0;
          crypto_offset = offset_diff;
        }
      sop->session = key->keys[op_type];
      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;
      if (PREDICT_TRUE (!(fe->flags & VNET_CRYPTO_OP_FLAG_CHAINED_BUFFERS)))
        sop->auth.digest.phys_addr = rte_pktmbuf_iova (sop->m_src) +
          fe->digest - rte_pktmbuf_mtod (sop->m_src, u8 *);
      else
        sop->auth.digest.phys_addr =
          cryptodev_validate_mbuf_chain (vm, sop->m_src, b, fe->digest);
      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;
  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;
  cryptodev_op_t **cop;
  u32 *bi;
  u32 n_enqueue = 0, n_elts;
  cryptodev_key_t *key;
  u32 last_key_index;

  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;
  frame->state = VNET_CRYPTO_OP_STATUS_COMPLETED;

  key = pool_elt_at_index (cmt->keys, fe->key_index);
  last_key_index = fe->key_index;

  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)
        {
          u8 sess_aad_len;
          key = pool_elt_at_index (cmt->keys, fe->key_index);
          sess_aad_len = (u8) key->keys[op_type]->opaque_data;
          if (PREDICT_FALSE (sess_aad_len != aad_len))
            {
              cryptodev_sess_handler (vm, VNET_CRYPTO_KEY_OP_MODIFY,
                                      fe->key_index, aad_len);
            }
          last_key_index = fe->key_index;
        }

      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 = key->keys[op_type];
      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;
      if (PREDICT_TRUE (!(fe->flags & VNET_CRYPTO_OP_FLAG_CHAINED_BUFFERS)))
        sop->aead.digest.phys_addr = rte_pktmbuf_iova (sop->m_src) +
          fe->tag - rte_pktmbuf_mtod (sop->m_src, u8 *);
      else
        sop->aead.digest.phys_addr =
          cryptodev_validate_mbuf_chain (vm, sop->m_src, b, fe->tag);
      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)
{
  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);

  return frame;
}

/* *INDENT-OFF* */

#define _(a, b, c, d, e, f) \
static_always_inline int \
cryptodev_enqueue_##a##_AAD##f##_enc (vlib_main_t * vm, \
                                      vnet_crypto_async_frame_t * frame) \
{ \
  return cryptodev_frame_gcm_enqueue (vm, frame, \
                                      CRYPTODEV_OP_TYPE_ENCRYPT, f); \
} \
static_always_inline int \
cryptodev_enqueue_##a##_AAD##f##_dec (vlib_main_t * vm, \
                                      vnet_crypto_async_frame_t * frame) \
{ \
  return cryptodev_frame_gcm_enqueue (vm, frame, \
                                      CRYPTODEV_OP_TYPE_DECRYPT, f); \
}

foreach_vnet_aead_crypto_conversion
#undef _

#define _(a, b, c, d) \
static_always_inline int \
cryptodev_enqueue_##a##_##c##_TAG##d##_enc (vlib_main_t * vm, \
                                      vnet_crypto_async_frame_t * frame) \
{ \
  return cryptodev_frame_linked_algs_enqueue (vm, frame, \
                                              CRYPTODEV_OP_TYPE_ENCRYPT, d); \
} \
static_always_inline int \
cryptodev_enqueue_##a##_##c##_TAG##d##_dec (vlib_main_t * vm, \
                                      vnet_crypto_async_frame_t * frame) \
{ \
  return cryptodev_frame_linked_algs_enqueue (vm, frame, \
                                              CRYPTODEV_OP_TYPE_DECRYPT, d); \
}

foreach_cryptodev_link_async_alg
#undef _

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);
      if (rte_cryptodev_socket_id (i) != numa)
        {
          clib_warning ("DPDK crypto resource %s is in different numa node "
              "as %u, ignored", info.device->name, numa);
          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;
  cryptodev_numa_data_t *numa_data = vec_elt_at_index (cmt->per_numa_data,
                                                       vm->numa_node);
  u32 i;
  int ret;

  cdev = rte_cryptodev_pmd_get_dev (cryptodev_id);
  rte_cryptodev_info_get (cryptodev_id, &info);

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

  /** 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 = vm->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 = numa_data->sess_pool;
          qp_cfg.mp_session_private = numa_data->sess_priv_pool;
          qp_cfg.nb_descriptors = CRYPTODEV_NB_CRYPTO_OPS;

          ret = rte_cryptodev_queue_pair_setup (cryptodev_id, i, &qp_cfg,
                                                vm->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 < info.max_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_create_device (vlib_main_t *vm, u32 n_queues)
{
  char name[RTE_CRYPTODEV_NAME_MAX_LEN], args[128];
  u32 dev_id = 0;
  int ret;

  /* find an unused name to create the device */
  while (dev_id < RTE_CRYPTO_MAX_DEVS)
    {
      snprintf (name, RTE_CRYPTODEV_NAME_MAX_LEN - 1, "%s%u",
                RTE_STR (CRYPTODEV_DEF_DRIVE), dev_id);
      if (rte_cryptodev_get_dev_id (name) < 0)
        break;
      dev_id++;
    }

  if (dev_id == RTE_CRYPTO_MAX_DEVS)
    return -1;

  snprintf (args, 127, "socket_id=%u,max_nb_queue_pairs=%u",
            vm->numa_node, n_queues);

  ret = rte_vdev_init(name, args);
  if (ret < 0)
    return ret;

  clib_warning ("Created cryptodev device %s (%s)", name, args);

  return 0;
}

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

  /* create an AESNI_MB PMD so the service is available */
  if (n_queues < n_workers)
    {
      u32 q_num = max_pow2 (n_workers - n_queues);
      ret = cryptodev_create_device (vm, q_num);
      if (ret < 0)
        return ret;
    }

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

  return 0;
}

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

  if (rte_cryptodev_count () == 0)
    {
      clib_warning ("No cryptodev device available, creating...");
      ret = cryptodev_create_device (vm, max_pow2 (n_workers));
      if (ret < 0)
        {
          clib_warning ("Failed");
          return ret;
        }
    }

  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;

  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 (n_workers * CRYPTODEV_NB_CRYPTO_OPS);

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

  /* create session pool for the numa node */
  name = format (0, "vcryptodev_sess_pool_%u", numa);
  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", numa);
  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", numa);

  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;

  /* 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", i);
      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);
    }

  /* register handler */
  eidx = vnet_crypto_register_engine (vm, "dpdk_cryptodev", 79,
                                      "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_##a##_AAD##f##_enc, \
        cryptodev_frame_dequeue); \
  vnet_crypto_register_async_handler \
    (vm, eidx, VNET_CRYPTO_OP_##a##_TAG##e##_AAD##f##_DEC, \
        cryptodev_enqueue_##a##_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_##a##_##c##_TAG##d##_enc, \
        cryptodev_frame_dequeue); \
  vnet_crypto_register_async_handler \
    (vm, eidx, VNET_CRYPTO_OP_##a##_##c##_TAG##d##_DEC, \
        cryptodev_enqueue_##a##_##c##_TAG##d##_dec, \
        cryptodev_frame_dequeue);

    foreach_cryptodev_link_async_alg
#undef _

  vnet_crypto_register_key_handler (vm, eidx, cryptodev_key_handler);

  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:
 */