crypto: introduce async crypto infra

Type: feature

Signed-off-by: Damjan Marion <damarion@cisco.com>
Signed-off-by: Filip Tehlar <ftehlar@cisco.com>
Signed-off-by: Fan Zhang <roy.fan.zhang@intel.com>
Signed-off-by: Piotr Bronowski <piotrx.bronowski@intel.com>
Signed-off-by: Dariusz Kazimierski <dariuszx.kazimierski@intel.com>
Signed-off-by: Piotr Kleski <piotrx.kleski@intel.com>
Change-Id: I4c3fcccf55c36842b7b48aed260fef2802b5c54b

5 files changed, 1025 insertions, 32 deletions

diff --git a/src/vnet/crypto/cli.c b/src/vnet/crypto/cli.c
index c3383692757..f6778930ef7 100644
--- a/src/vnet/crypto/cli.c
+++ b/src/vnet/crypto/cli.c
@@ -58,26 +58,45 @@ format_vnet_crypto_engine_candidates (u8 * s, va_list * args)
 {
   vnet_crypto_engine_t *e;
   vnet_crypto_main_t *cm = &crypto_main;
-
-  vnet_crypto_op_id_t id = va_arg (*args, vnet_crypto_op_id_t);
+  u32 id = va_arg (*args, u32);
   u32 ei = va_arg (*args, u32);
   int is_chained = va_arg (*args, int);
+  int is_async = va_arg (*args, int);
 
-  vec_foreach (e, cm->engines)
+  if (is_async)
     {
-      void * h = is_chained ? (void *) e->chained_ops_handlers[id]
-        : (void *) e->ops_handlers[id];
-
-      if (h)
-        {
-          s = format (s, "%U", format_vnet_crypto_engine, e - cm->engines);
-          if (ei == e - cm->engines)
-            s = format (s, "%c ", '*');
-          else
-            s = format (s, " ");
-        }
+      vec_foreach (e, cm->engines)
+	{
+	  if (e->enqueue_handlers[id] && e->dequeue_handlers[id])
+	    {
+	      s = format (s, "%U", format_vnet_crypto_engine, e - cm->engines);
+	      if (ei == e - cm->engines)
+		s = format (s, "%c ", '*');
+	      else
+		s = format (s, " ");
+	    }
+	}
+
+      return s;
+    }
+  else
+    {
+      vec_foreach (e, cm->engines)
+	{
+	  void * h = is_chained ? (void *) e->chained_ops_handlers[id]
+	    : (void *) e->ops_handlers[id];
+
+	  if (h)
+	    {
+	      s = format (s, "%U", format_vnet_crypto_engine, e - cm->engines);
+	      if (ei == e - cm->engines)
+		s = format (s, "%c ", '*');
+	      else
+		s = format (s, " ");
+	    }
+	}
+      return s;
     }
-  return s;
 }
 
 static u8 *
@@ -103,9 +122,9 @@ format_vnet_crypto_handlers (u8 * s, va_list * args)
       s = format (s, "%-16U", format_vnet_crypto_op_type, od->type);
 
       s = format (s, "%-28U", format_vnet_crypto_engine_candidates, id,
-          od->active_engine_index_simple, 0);
+          od->active_engine_index_simple, 0, 0);
       s = format (s, "%U", format_vnet_crypto_engine_candidates, id,
-          od->active_engine_index_chained, 1);
+          od->active_engine_index_chained, 1, 0);
       first = 0;
     }
   return s;
@@ -232,6 +251,148 @@ VLIB_CLI_COMMAND (set_crypto_handler_command, static) =
 };
 /* *INDENT-ON* */
 
+static u8 *
+format_vnet_crypto_async_handlers (u8 * s, va_list * args)
+{
+  vnet_crypto_async_alg_t alg = va_arg (*args, vnet_crypto_async_alg_t);
+  vnet_crypto_main_t *cm = &crypto_main;
+  vnet_crypto_async_alg_data_t *d = vec_elt_at_index (cm->async_algs, alg);
+  u32 indent = format_get_indent (s);
+  int i, first = 1;
+
+  for (i = 0; i < VNET_CRYPTO_ASYNC_OP_N_TYPES; i++)
+    {
+      vnet_crypto_async_op_data_t *od;
+      vnet_crypto_async_op_id_t id = d->op_by_type[i];
+
+      if (id == 0)
+	continue;
+
+      od = cm->async_opt_data + id;
+      if (first == 0)
+	s = format (s, "\n%U", format_white_space, indent);
+      s = format (s, "%-16U", format_vnet_crypto_async_op_type, od->type);
+
+      s = format (s, "%U", format_vnet_crypto_engine_candidates, id,
+		  od->active_engine_index_async, 0, 1);
+      first = 0;
+    }
+  return s;
+}
+
+static clib_error_t *
+show_crypto_async_handlers_command_fn (vlib_main_t * vm,
+				       unformat_input_t * input,
+				       vlib_cli_command_t * cmd)
+{
+  unformat_input_t _line_input, *line_input = &_line_input;
+  int i;
+
+  if (unformat_user (input, unformat_line_input, line_input))
+    unformat_free (line_input);
+
+  vlib_cli_output (vm, "%-28s%-16s%s", "Algo", "Type", "Handler");
+
+  for (i = 0; i < VNET_CRYPTO_N_ASYNC_ALGS; i++)
+    vlib_cli_output (vm, "%-28U%U", format_vnet_crypto_async_alg, i,
+		     format_vnet_crypto_async_handlers, i);
+
+  return 0;
+}
+
+/* *INDENT-OFF* */
+VLIB_CLI_COMMAND (show_crypto_async_handlers_command, static) =
+{
+  .path = "show crypto async handlers",
+  .short_help = "show crypto async handlers",
+  .function = show_crypto_async_handlers_command_fn,
+};
+/* *INDENT-ON* */
+
+
+static clib_error_t *
+set_crypto_async_handler_command_fn (vlib_main_t * vm,
+				     unformat_input_t * input,
+				     vlib_cli_command_t * cmd)
+{
+  unformat_input_t _line_input, *line_input = &_line_input;
+  vnet_crypto_main_t *cm = &crypto_main;
+  int rc = 0;
+  char **args = 0, *s, **arg, *engine = 0;
+  int all = 0;
+  clib_error_t *error = 0;
+
+  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, "all"))
+	all = 1;
+      else if (unformat (line_input, "%s", &s))
+	vec_add1 (args, s);
+      else
+	{
+	  error = clib_error_return (0, "invalid params");
+	  goto done;
+	}
+    }
+
+  if ((vec_len (args) < 2 && !all) || (vec_len (args) == 0 && all))
+    {
+      error = clib_error_return (0, "missing cipher or engine!");
+      goto done;
+    }
+
+  engine = vec_elt_at_index (args, vec_len (args) - 1)[0];
+  vec_del1 (args, vec_len (args) - 1);
+
+  if (all)
+    {
+      char *key;
+      u8 *value;
+
+      /* *INDENT-OFF* */
+      hash_foreach_mem (key, value, cm->async_alg_index_by_name,
+      ({
+        (void) value;
+        rc += vnet_crypto_set_async_handler2 (key, engine);
+      }));
+      /* *INDENT-ON* */
+
+      if (rc)
+	vlib_cli_output (vm, "failed to set crypto engine!");
+    }
+  else
+    {
+      vec_foreach (arg, args)
+      {
+	rc = vnet_crypto_set_async_handler2 (arg[0], engine);
+	if (rc)
+	  {
+	    vlib_cli_output (vm, "failed to set engine %s for %s!",
+			     engine, arg[0]);
+	  }
+      }
+    }
+
+done:
+  vec_free (engine);
+  vec_foreach (arg, args) vec_free (arg[0]);
+  vec_free (args);
+  unformat_free (line_input);
+  return error;
+}
+
+/* *INDENT-OFF* */
+VLIB_CLI_COMMAND (set_crypto_async_handler_command, static) =
+{
+  .path = "set crypto async handler",
+  .short_help = "set crypto async handler type [type2 type3 ...] engine",
+  .function = set_crypto_async_handler_command_fn,
+};
+/* *INDENT-ON* */
+
 /*
  * fd.io coding-style-patch-verification: ON
  *
diff --git a/src/vnet/crypto/crypto.c b/src/vnet/crypto/crypto.c
index 1caff71b3e2..288e227821b 100644
--- a/src/vnet/crypto/crypto.c
+++ b/src/vnet/crypto/crypto.c
@@ -61,7 +61,6 @@ vnet_crypto_process_ops_call_handler (vlib_main_t * vm,
   return rv;
 }
 
-
 static_always_inline u32
 vnet_crypto_process_ops_inline (vlib_main_t * vm, vnet_crypto_op_t ops[],
 				vnet_crypto_op_chunk_t * chunks, u32 n_ops)
@@ -267,6 +266,44 @@ vnet_crypto_register_ops_handlers (vlib_main_t * vm, u32 engine_index,
 }
 
 void
+vnet_crypto_register_async_handler (vlib_main_t * vm, u32 engine_index,
+				    vnet_crypto_async_op_id_t opt,
+				    vnet_crypto_frame_enqueue_t * enqueue_hdl,
+				    vnet_crypto_frame_dequeue_t * dequeue_hdl)
+{
+  vnet_crypto_main_t *cm = &crypto_main;
+  vnet_crypto_engine_t *ae, *e = vec_elt_at_index (cm->engines, engine_index);
+  vnet_crypto_async_op_data_t *otd = cm->async_opt_data + opt;
+  vec_validate_aligned (cm->enqueue_handlers, VNET_CRYPTO_ASYNC_OP_N_IDS - 1,
+			CLIB_CACHE_LINE_BYTES);
+  vec_validate_aligned (cm->dequeue_handlers, VNET_CRYPTO_ASYNC_OP_N_IDS - 1,
+			CLIB_CACHE_LINE_BYTES);
+
+  /* both enqueue hdl and dequeue hdl should present */
+  if (!enqueue_hdl && !dequeue_hdl)
+    return;
+
+  e->enqueue_handlers[opt] = enqueue_hdl;
+  e->dequeue_handlers[opt] = dequeue_hdl;
+  if (otd->active_engine_index_async == ~0)
+    {
+      otd->active_engine_index_async = engine_index;
+      cm->enqueue_handlers[opt] = enqueue_hdl;
+      cm->dequeue_handlers[opt] = dequeue_hdl;
+    }
+
+  ae = vec_elt_at_index (cm->engines, otd->active_engine_index_async);
+  if (ae->priority < e->priority)
+    {
+      otd->active_engine_index_async = engine_index;
+      cm->enqueue_handlers[opt] = enqueue_hdl;
+      cm->dequeue_handlers[opt] = dequeue_hdl;
+    }
+
+  return;
+}
+
+void
 vnet_crypto_register_key_handler (vlib_main_t * vm, u32 engine_index,
 				  vnet_crypto_key_handler_t * key_handler)
 {
@@ -318,10 +355,10 @@ vnet_crypto_key_add (vlib_main_t * vm, vnet_crypto_alg_t alg, u8 * data,
 
   pool_get_zero (cm->keys, key);
   index = key - cm->keys;
+  key->type = VNET_CRYPTO_KEY_TYPE_DATA;
   key->alg = alg;
   vec_validate_aligned (key->data, length - 1, CLIB_CACHE_LINE_BYTES);
   clib_memcpy (key->data, data, length);
-
   /* *INDENT-OFF* */
   vec_foreach (engine, cm->engines)
     if (engine->key_op_handler)
@@ -343,11 +380,218 @@ vnet_crypto_key_del (vlib_main_t * vm, vnet_crypto_key_index_t index)
       engine->key_op_handler (vm, VNET_CRYPTO_KEY_OP_DEL, index);
   /* *INDENT-ON* */
 
-  clib_memset (key->data, 0, vec_len (key->data));
-  vec_free (key->data);
+  if (key->type == VNET_CRYPTO_KEY_TYPE_DATA)
+    {
+      clib_memset (key->data, 0, vec_len (key->data));
+      vec_free (key->data);
+    }
+  else if (key->type == VNET_CRYPTO_KEY_TYPE_LINK)
+    {
+      key->index_crypto = key->index_integ = 0;
+    }
+
   pool_put (cm->keys, key);
 }
 
+vnet_crypto_async_alg_t
+vnet_crypto_link_algs (vnet_crypto_alg_t crypto_alg,
+		       vnet_crypto_alg_t integ_alg)
+{
+#define _(c, h, s, k ,d) \
+  if (crypto_alg == VNET_CRYPTO_ALG_##c && \
+      integ_alg == VNET_CRYPTO_ALG_HMAC_##h) \
+    return VNET_CRYPTO_ALG_##c##_##h##_TAG##d;
+  foreach_crypto_link_async_alg
+#undef _
+    return ~0;
+}
+
+u32
+vnet_crypto_key_add_linked (vlib_main_t * vm,
+			    vnet_crypto_key_index_t index_crypto,
+			    vnet_crypto_key_index_t index_integ)
+{
+  u32 index;
+  vnet_crypto_main_t *cm = &crypto_main;
+  vnet_crypto_engine_t *engine;
+  vnet_crypto_key_t *key_crypto, *key_integ, *key;
+  vnet_crypto_async_alg_t linked_alg;
+
+  key_crypto = pool_elt_at_index (cm->keys, index_crypto);
+  key_integ = pool_elt_at_index (cm->keys, index_integ);
+
+  if (!key_crypto || !key_integ)
+    return ~0;
+
+  linked_alg = vnet_crypto_link_algs (key_crypto->alg, key_integ->alg);
+  if (linked_alg == ~0)
+    return ~0;
+
+  pool_get_zero (cm->keys, key);
+  index = key - cm->keys;
+  key->type = VNET_CRYPTO_KEY_TYPE_LINK;
+  key->index_crypto = index_crypto;
+  key->index_integ = index_integ;
+  key->async_alg = linked_alg;
+
+  /* *INDENT-OFF* */
+  vec_foreach (engine, cm->engines)
+    if (engine->key_op_handler)
+      engine->key_op_handler (vm, VNET_CRYPTO_KEY_OP_ADD, index);
+  /* *INDENT-ON* */
+
+  return index;
+}
+
+clib_error_t *
+crypto_dispatch_enable_disable (int is_enable)
+{
+  vlib_main_t *vm = vlib_get_main ();
+  vlib_thread_main_t *tm = vlib_get_thread_main ();
+  vlib_node_t *node = vlib_get_node_by_name (vm, (u8 *) "crypto-dispatch");
+  vnet_crypto_main_t *cm = &crypto_main;
+  u32 skip_master = vlib_num_workers () > 0, i;
+  u32 state_change = 0;
+  vlib_node_state_t state;
+
+  if (is_enable && cm->async_refcnt > 0)
+    {
+      state_change = 1;
+      state = VLIB_NODE_STATE_POLLING;
+    }
+
+  if (!is_enable && cm->async_refcnt == 0)
+    {
+      state_change = 1;
+      state = VLIB_NODE_STATE_DISABLED;
+    }
+
+  if (state_change)
+    for (i = skip_master; i < tm->n_vlib_mains; i++)
+      vlib_node_set_state (vlib_mains[i], node->index, state);
+
+  return 0;
+}
+
+static_always_inline void
+crypto_set_active_async_engine (vnet_crypto_async_op_data_t * od,
+				vnet_crypto_async_op_id_t id, u32 ei)
+{
+  vnet_crypto_main_t *cm = &crypto_main;
+  vnet_crypto_engine_t *ce = vec_elt_at_index (cm->engines, ei);
+
+  if (ce->enqueue_handlers[id] && ce->dequeue_handlers[id])
+    {
+      od->active_engine_index_async = ei;
+      cm->enqueue_handlers[id] = ce->enqueue_handlers[id];
+      cm->dequeue_handlers[id] = ce->dequeue_handlers[id];
+    }
+}
+
+int
+vnet_crypto_set_async_handler2 (char *alg_name, char *engine)
+{
+  uword *p;
+  vnet_crypto_main_t *cm = &crypto_main;
+  vnet_crypto_async_alg_data_t *ad;
+  int i;
+
+  p = hash_get_mem (cm->async_alg_index_by_name, alg_name);
+  if (!p)
+    return -1;
+
+  ad = vec_elt_at_index (cm->async_algs, p[0]);
+
+  p = hash_get_mem (cm->engine_index_by_name, engine);
+  if (!p)
+    return -1;
+
+  for (i = 0; i < VNET_CRYPTO_ASYNC_OP_N_TYPES; i++)
+    {
+      vnet_crypto_async_op_data_t *od;
+      vnet_crypto_async_op_id_t id = ad->op_by_type[i];
+      if (id == 0)
+	continue;
+
+      od = cm->async_opt_data + id;
+      crypto_set_active_async_engine (od, id, p[0]);
+    }
+
+  return 0;
+}
+
+u32
+vnet_crypto_register_post_node (vlib_main_t * vm, char *post_node_name)
+{
+  vnet_crypto_main_t *cm = &crypto_main;
+  vnet_crypto_async_next_node_t *nn = 0;
+  vlib_node_t *cc, *pn;
+  uword index = vec_len (cm->next_nodes);
+
+  pn = vlib_get_node_by_name (vm, (u8 *) post_node_name);
+  if (!pn)
+    return ~0;
+
+  /* *INDENT-OFF* */
+  vec_foreach (cm->next_nodes, nn)
+  {
+    if (nn->node_idx == pn->index)
+      return nn->next_idx;
+  }
+  /* *INDENT-ON* */
+
+  vec_validate (cm->next_nodes, index);
+  nn = vec_elt_at_index (cm->next_nodes, index);
+
+  cc = vlib_get_node_by_name (vm, (u8 *) "crypto-dispatch");
+  nn->next_idx = vlib_node_add_named_next (vm, cc->index, post_node_name);
+  nn->node_idx = pn->index;
+
+  return nn->next_idx;
+}
+
+void
+vnet_crypto_request_async_mode (int is_enable)
+{
+  vlib_main_t *vm = vlib_get_main ();
+  vlib_thread_main_t *tm = vlib_get_thread_main ();
+  vlib_node_t *node = vlib_get_node_by_name (vm, (u8 *) "crypto-dispatch");
+  vnet_crypto_main_t *cm = &crypto_main;
+  u32 skip_master = vlib_num_workers () > 0, i;
+  u32 state_change = 0;
+  vlib_node_state_t state;
+
+  if (is_enable && cm->async_refcnt == 0)
+    {
+      state_change = 1;
+      state = VLIB_NODE_STATE_POLLING;
+    }
+
+  if (!is_enable && cm->async_refcnt == 1)
+    {
+      state_change = 1;
+      state = VLIB_NODE_STATE_DISABLED;
+    }
+
+  if (state_change)
+    for (i = skip_master; i < tm->n_vlib_mains; i++)
+      vlib_node_set_state (vlib_mains[i], node->index, state);
+
+  if (is_enable)
+    cm->async_refcnt += 1;
+  else if (cm->async_refcnt > 0)
+    cm->async_refcnt -= 1;
+}
+
+int
+vnet_crypto_is_set_async_handler (vnet_crypto_async_op_id_t op)
+{
+  vnet_crypto_main_t *cm = &crypto_main;
+
+  return (op < vec_len (cm->enqueue_handlers) &&
+	  NULL != cm->enqueue_handlers[op]);
+}
+
 static void
 vnet_crypto_init_cipher_data (vnet_crypto_alg_t alg, vnet_crypto_op_id_t eid,
 			      vnet_crypto_op_id_t did, char *name, u8 is_aead)
@@ -392,16 +636,44 @@ vnet_crypto_init_hmac_data (vnet_crypto_alg_t alg,
   hash_set_mem (cm->alg_index_by_name, name, alg);
 }
 
+static void
+vnet_crypto_init_async_data (vnet_crypto_async_alg_t alg,
+			     vnet_crypto_async_op_id_t eid,
+			     vnet_crypto_async_op_id_t did, char *name)
+{
+  vnet_crypto_main_t *cm = &crypto_main;
+
+  cm->async_algs[alg].name = name;
+  cm->async_algs[alg].op_by_type[VNET_CRYPTO_ASYNC_OP_TYPE_ENCRYPT] = eid;
+  cm->async_algs[alg].op_by_type[VNET_CRYPTO_ASYNC_OP_TYPE_DECRYPT] = did;
+  cm->async_opt_data[eid].type = VNET_CRYPTO_ASYNC_OP_TYPE_ENCRYPT;
+  cm->async_opt_data[eid].alg = alg;
+  cm->async_opt_data[eid].active_engine_index_async = ~0;
+  cm->async_opt_data[eid].active_engine_index_async = ~0;
+  cm->async_opt_data[did].type = VNET_CRYPTO_ASYNC_OP_TYPE_DECRYPT;
+  cm->async_opt_data[did].alg = alg;
+  cm->async_opt_data[did].active_engine_index_async = ~0;
+  cm->async_opt_data[did].active_engine_index_async = ~0;
+  hash_set_mem (cm->async_alg_index_by_name, name, alg);
+}
+
 clib_error_t *
 vnet_crypto_init (vlib_main_t * vm)
 {
   vnet_crypto_main_t *cm = &crypto_main;
   vlib_thread_main_t *tm = vlib_get_thread_main ();
+  vnet_crypto_thread_t *ct = 0;
   cm->engine_index_by_name = hash_create_string ( /* size */ 0,
 						 sizeof (uword));
   cm->alg_index_by_name = hash_create_string (0, sizeof (uword));
+  cm->async_alg_index_by_name = hash_create_string (0, sizeof (uword));
   vec_validate_aligned (cm->threads, tm->n_vlib_mains, CLIB_CACHE_LINE_BYTES);
+  vec_foreach (ct, cm->threads)
+    pool_alloc_aligned (ct->frame_pool, 256, CLIB_CACHE_LINE_BYTES);
   vec_validate (cm->algs, VNET_CRYPTO_N_ALGS);
+  vec_validate (cm->async_algs, VNET_CRYPTO_N_ASYNC_ALGS);
+  clib_bitmap_validate (cm->async_active_ids, VNET_CRYPTO_ASYNC_OP_N_IDS - 1);
+
 #define _(n, s, l) \
   vnet_crypto_init_cipher_data (VNET_CRYPTO_ALG_##n, \
 				VNET_CRYPTO_OP_##n##_ENC, \
@@ -419,7 +691,21 @@ vnet_crypto_init (vlib_main_t * vm)
 			      VNET_CRYPTO_OP_##n##_HMAC, "hmac-" s);
   foreach_crypto_hmac_alg;
 #undef _
-  return 0;
+#define _(n, s, k, t, a) \
+  vnet_crypto_init_async_data (VNET_CRYPTO_ALG_##n##_TAG##t##_AAD##a, \
+			       VNET_CRYPTO_OP_##n##_TAG##t##_AAD##a##_ENC, \
+			       VNET_CRYPTO_OP_##n##_TAG##t##_AAD##a##_DEC, \
+			       s);
+  foreach_crypto_aead_async_alg
+#undef _
+#define _(c, h, s, k ,d) \
+  vnet_crypto_init_async_data (VNET_CRYPTO_ALG_##c##_##h##_TAG##d, \
+			       VNET_CRYPTO_OP_##c##_##h##_TAG##d##_ENC, \
+			       VNET_CRYPTO_OP_##c##_##h##_TAG##d##_DEC, \
+			       s);
+    foreach_crypto_link_async_alg
+#undef _
+    return 0;
 }
 
 VLIB_INIT_FUNCTION (vnet_crypto_init);
diff --git a/src/vnet/crypto/crypto.h b/src/vnet/crypto/crypto.h
index f89ecf9f3d5..b0a83e08be3 100644
--- a/src/vnet/crypto/crypto.h
+++ b/src/vnet/crypto/crypto.h
@@ -16,10 +16,10 @@
 #ifndef included_vnet_crypto_crypto_h
 #define included_vnet_crypto_crypto_h
 
-#define VNET_CRYPTO_RING_SIZE 512
-
 #include <vlib/vlib.h>
 
+#define VNET_CRYPTO_FRAME_SIZE 32
+
 /* CRYPTO_ID, PRETTY_NAME, KEY_LENGTH_IN_BYTES */
 #define foreach_crypto_cipher_alg \
   _(DES_CBC,     "des-cbc", 7) \
@@ -45,7 +45,6 @@
   _(SHA384, "sha-384")  \
   _(SHA512, "sha-512")
 
-
 #define foreach_crypto_op_type \
   _(ENCRYPT, "encrypt") \
   _(DECRYPT, "decrypt") \
@@ -62,10 +61,46 @@ typedef enum
 } vnet_crypto_op_type_t;
 
 #define foreach_crypto_op_status \
+  _(IDLE, "idle") \
   _(PENDING, "pending") \
+  _(WORK_IN_PROGRESS, "work-in-progress") \
   _(COMPLETED, "completed") \
   _(FAIL_NO_HANDLER, "no-handler") \
-  _(FAIL_BAD_HMAC, "bad-hmac")
+  _(FAIL_BAD_HMAC, "bad-hmac") \
+  _(FAIL_ENGINE_ERR, "engine-error")
+
+/** async crypto **/
+
+/* CRYPTO_ID, PRETTY_NAME, KEY_LENGTH_IN_BYTES, TAG_LEN, AAD_LEN */
+#define foreach_crypto_aead_async_alg \
+  _(AES_128_GCM, "aes-128-gcm-aad8", 16, 16, 8) \
+  _(AES_128_GCM, "aes-128-gcm-aad12", 16, 16, 12) \
+  _(AES_192_GCM, "aes-192-gcm-aad8", 24, 16, 8) \
+  _(AES_192_GCM, "aes-192-gcm-aad12", 24, 16, 12) \
+  _(AES_256_GCM, "aes-256-gcm-aad8", 32, 16, 8) \
+  _(AES_256_GCM, "aes-256-gcm-aad12", 32, 16, 12)
+
+/* CRYPTO_ID, INTEG_ID, PRETTY_NAME, KEY_LENGTH_IN_BYTES, DIGEST_LEN */
+#define foreach_crypto_link_async_alg \
+  _ (AES_128_CBC, SHA1, "aes-128-cbc-hmac-sha-1", 16, 12) \
+  _ (AES_192_CBC, SHA1, "aes-192-cbc-hmac-sha-1", 24, 12) \
+  _ (AES_256_CBC, SHA1, "aes-256-cbc-hmac-sha-1", 32, 12) \
+  _ (AES_128_CBC, SHA224, "aes-128-cbc-hmac-sha-224", 16, 14) \
+  _ (AES_192_CBC, SHA224, "aes-192-cbc-hmac-sha-224", 24, 14) \
+  _ (AES_256_CBC, SHA224, "aes-256-cbc-hmac-sha-224", 32, 14) \
+  _ (AES_128_CBC, SHA256, "aes-128-cbc-hmac-sha-256", 16, 16) \
+  _ (AES_192_CBC, SHA256, "aes-192-cbc-hmac-sha-256", 24, 16) \
+  _ (AES_256_CBC, SHA256, "aes-256-cbc-hmac-sha-256", 32, 16) \
+  _ (AES_128_CBC, SHA384, "aes-128-cbc-hmac-sha-384", 16, 24) \
+  _ (AES_192_CBC, SHA384, "aes-192-cbc-hmac-sha-384", 24, 24) \
+  _ (AES_256_CBC, SHA384, "aes-256-cbc-hmac-sha-384", 32, 24) \
+  _ (AES_128_CBC, SHA512, "aes-128-cbc-hmac-sha-512", 16, 32) \
+  _ (AES_192_CBC, SHA512, "aes-192-cbc-hmac-sha-512", 24, 32) \
+  _ (AES_256_CBC, SHA512, "aes-256-cbc-hmac-sha-512", 32, 32)
+
+#define foreach_crypto_async_op_type \
+  _(ENCRYPT, "async-encrypt") \
+  _(DECRYPT, "async-decrypt")
 
 typedef enum
 {
@@ -96,10 +131,63 @@ typedef enum
   VNET_CRYPTO_N_ALGS,
 } vnet_crypto_alg_t;
 
+typedef enum
+{
+#define _(n, s) VNET_CRYPTO_ASYNC_OP_TYPE_##n,
+  foreach_crypto_async_op_type
+#undef _
+    VNET_CRYPTO_ASYNC_OP_N_TYPES,
+} vnet_crypto_async_op_type_t;
+
+typedef enum
+{
+  VNET_CRYPTO_ASYNC_ALG_NONE = 0,
+#define _(n, s, k, t, a) \
+  VNET_CRYPTO_ALG_##n##_TAG##t##_AAD##a,
+  foreach_crypto_aead_async_alg
+#undef _
+#define _(c, h, s, k ,d) \
+  VNET_CRYPTO_ALG_##c##_##h##_TAG##d,
+  foreach_crypto_link_async_alg
+#undef _
+  VNET_CRYPTO_N_ASYNC_ALGS,
+} vnet_crypto_async_alg_t;
+
+typedef enum
+{
+  VNET_CRYPTO_ASYNC_OP_NONE = 0,
+#define _(n, s, k, t, a) \
+  VNET_CRYPTO_OP_##n##_TAG##t##_AAD##a##_ENC, \
+  VNET_CRYPTO_OP_##n##_TAG##t##_AAD##a##_DEC,
+  foreach_crypto_aead_async_alg
+#undef _
+#define _(c, h, s, k ,d) \
+  VNET_CRYPTO_OP_##c##_##h##_TAG##d##_ENC, \
+  VNET_CRYPTO_OP_##c##_##h##_TAG##d##_DEC,
+  foreach_crypto_link_async_alg
+#undef _
+  VNET_CRYPTO_ASYNC_OP_N_IDS,
+} vnet_crypto_async_op_id_t;
+
 typedef struct
 {
-  u8 *data;
-  vnet_crypto_alg_t alg:8;
+  union
+  {
+    struct
+    {
+      u8 *data;
+      vnet_crypto_alg_t alg:8;
+    };
+    struct
+    {
+      u32 index_crypto;
+      u32 index_integ;
+      vnet_crypto_async_alg_t async_alg:8;
+    };
+  };
+#define VNET_CRYPTO_KEY_TYPE_DATA 0
+#define VNET_CRYPTO_KEY_TYPE_LINK 1
+  u8 type;
 } vnet_crypto_key_t;
 
 typedef enum
@@ -116,6 +204,7 @@ typedef enum
 } vnet_crypto_op_id_t;
 /* *INDENT-ON* */
 
+
 typedef enum
 {
   CRYPTO_OP_SIMPLE,
@@ -196,8 +285,58 @@ typedef struct
 
 typedef struct
 {
+  vnet_crypto_async_op_type_t type;
+  vnet_crypto_async_alg_t alg;
+  u32 active_engine_index_async;
+} vnet_crypto_async_op_data_t;
+
+typedef struct
+{
+  char *name;
+  vnet_crypto_async_op_id_t op_by_type[VNET_CRYPTO_ASYNC_OP_N_TYPES];
+} vnet_crypto_async_alg_data_t;
+
+typedef struct
+{
+  vnet_crypto_op_status_t status:8;
+  u32 key_index;
+  i16 crypto_start_offset;	/* first buffer offset */
+  i16 integ_start_offset;
+  u32 crypto_total_length;
+  /* adj total_length for integ, e.g.4 bytes for IPSec ESN */
+  u16 integ_length_adj;
+  u8 *iv;
+  union
+  {
+    u8 *digest;
+    u8 *tag;
+  };
+  u8 *aad;
+  u8 flags; /**< share same VNET_CRYPTO_OP_FLAG_* values */
+} vnet_crypto_async_frame_elt_t;
+
+typedef struct
+{
   CLIB_CACHE_LINE_ALIGN_MARK (cacheline0);
-  clib_bitmap_t *act_queues;
+#define VNET_CRYPTO_FRAME_STATE_NOT_PROCESSED 0
+#define VNET_CRYPTO_FRAME_STATE_WORK_IN_PROGRESS 1
+#define VNET_CRYPTO_FRAME_STATE_SUCCESS 2
+#define VNET_CRYPTO_FRAME_STATE_ELT_ERROR 3
+  u8 state;
+  vnet_crypto_async_op_id_t op:8;
+  u16 n_elts;
+  vnet_crypto_async_frame_elt_t elts[VNET_CRYPTO_FRAME_SIZE];
+  u32 buffer_indices[VNET_CRYPTO_FRAME_SIZE];
+  u16 next_node_index[VNET_CRYPTO_FRAME_SIZE];
+} vnet_crypto_async_frame_t;
+
+typedef struct
+{
+  CLIB_CACHE_LINE_ALIGN_MARK (cacheline0);
+  vnet_crypto_async_frame_t *frames[VNET_CRYPTO_ASYNC_OP_N_IDS];
+  vnet_crypto_async_frame_t *frame_pool;
+  u32 *buffer_indice;
+  u16 *nexts;
 } vnet_crypto_thread_t;
 
 typedef u32 vnet_crypto_key_index_t;
@@ -214,6 +353,12 @@ typedef void (vnet_crypto_key_handler_t) (vlib_main_t * vm,
 					  vnet_crypto_key_op_t kop,
 					  vnet_crypto_key_index_t idx);
 
+/** async crypto function handlers **/
+typedef int (vnet_crypto_frame_enqueue_t) (vlib_main_t * vm,
+					   vnet_crypto_async_frame_t * frame);
+typedef vnet_crypto_async_frame_t *
+  (vnet_crypto_frame_dequeue_t) (vlib_main_t * vm);
+
 u32 vnet_crypto_register_engine (vlib_main_t * vm, char *name, int prio,
 				 char *desc);
 
@@ -226,6 +371,7 @@ void vnet_crypto_register_chained_ops_handler (vlib_main_t * vm,
 					       vnet_crypto_op_id_t opt,
 					       vnet_crypto_chained_ops_handler_t
 					       * oph);
+
 void vnet_crypto_register_ops_handlers (vlib_main_t * vm, u32 engine_index,
 					vnet_crypto_op_id_t opt,
 					vnet_crypto_ops_handler_t * fn,
@@ -235,6 +381,15 @@ void vnet_crypto_register_ops_handlers (vlib_main_t * vm, u32 engine_index,
 void vnet_crypto_register_key_handler (vlib_main_t * vm, u32 engine_index,
 				       vnet_crypto_key_handler_t * keyh);
 
+/** async crypto register functions */
+u32 vnet_crypto_register_post_node (vlib_main_t * vm, char *post_node_name);
+void vnet_crypto_register_async_handler (vlib_main_t * vm,
+					 u32 engine_index,
+					 vnet_crypto_async_op_id_t opt,
+					 vnet_crypto_frame_enqueue_t * enq_fn,
+					 vnet_crypto_frame_dequeue_t *
+					 deq_fn);
+
 typedef struct
 {
   char *name;
@@ -244,32 +399,46 @@ typedef struct
   vnet_crypto_ops_handler_t *ops_handlers[VNET_CRYPTO_N_OP_IDS];
     vnet_crypto_chained_ops_handler_t
     * chained_ops_handlers[VNET_CRYPTO_N_OP_IDS];
+  vnet_crypto_frame_enqueue_t *enqueue_handlers[VNET_CRYPTO_ASYNC_OP_N_IDS];
+  vnet_crypto_frame_dequeue_t *dequeue_handlers[VNET_CRYPTO_ASYNC_OP_N_IDS];
 } vnet_crypto_engine_t;
 
 typedef struct
 {
+  u32 node_idx;
+  u32 next_idx;
+} vnet_crypto_async_next_node_t;
+
+typedef struct
+{
   vnet_crypto_alg_data_t *algs;
   vnet_crypto_thread_t *threads;
   vnet_crypto_ops_handler_t **ops_handlers;
   vnet_crypto_chained_ops_handler_t **chained_ops_handlers;
+  vnet_crypto_frame_enqueue_t **enqueue_handlers;
+  vnet_crypto_frame_dequeue_t **dequeue_handlers;
+  clib_bitmap_t *async_active_ids;
   vnet_crypto_op_data_t opt_data[VNET_CRYPTO_N_OP_IDS];
+  vnet_crypto_async_op_data_t async_opt_data[VNET_CRYPTO_ASYNC_OP_N_IDS];
   vnet_crypto_engine_t *engines;
   vnet_crypto_key_t *keys;
   uword *engine_index_by_name;
   uword *alg_index_by_name;
+  uword *async_alg_index_by_name;
+  vnet_crypto_async_alg_data_t *async_algs;
+  u32 async_refcnt;
+  vnet_crypto_async_next_node_t *next_nodes;
 } vnet_crypto_main_t;
 
 extern vnet_crypto_main_t crypto_main;
 
-u32 vnet_crypto_submit_ops (vlib_main_t * vm, vnet_crypto_op_t ** jobs,
-			    u32 n_jobs);
-
 u32 vnet_crypto_process_chained_ops (vlib_main_t * vm, vnet_crypto_op_t ops[],
 				     vnet_crypto_op_chunk_t * chunks,
 				     u32 n_ops);
 u32 vnet_crypto_process_ops (vlib_main_t * vm, vnet_crypto_op_t ops[],
 			     u32 n_ops);
 
+
 int vnet_crypto_set_handler2 (char *ops_handler_name, char *engine,
 			      crypto_op_class_type_t oct);
 int vnet_crypto_is_set_handler (vnet_crypto_alg_t alg);
@@ -278,6 +447,27 @@ u32 vnet_crypto_key_add (vlib_main_t * vm, vnet_crypto_alg_t alg,
 			 u8 * data, u16 length);
 void vnet_crypto_key_del (vlib_main_t * vm, vnet_crypto_key_index_t index);
 
+/**
+ * Use 2 created keys to generate new key for linked algs (cipher + integ)
+ * The returned key index is to be used for linked alg only.
+ **/
+u32 vnet_crypto_key_add_linked (vlib_main_t * vm,
+				vnet_crypto_key_index_t index_crypto,
+				vnet_crypto_key_index_t index_integ);
+
+clib_error_t *crypto_dispatch_enable_disable (int is_enable);
+
+int vnet_crypto_set_async_handler2 (char *alg_name, char *engine);
+
+int vnet_crypto_is_set_async_handler (vnet_crypto_async_op_id_t opt);
+
+void vnet_crypto_request_async_mode (int is_enable);
+
+vnet_crypto_async_alg_t vnet_crypto_link_algs (vnet_crypto_alg_t crypto_alg,
+					       vnet_crypto_alg_t integ_alg);
+
+clib_error_t *crypto_dispatch_enable_disable (int is_enable);
+
 format_function_t format_vnet_crypto_alg;
 format_function_t format_vnet_crypto_engine;
 format_function_t format_vnet_crypto_op;
@@ -285,6 +475,10 @@ format_function_t format_vnet_crypto_op_type;
 format_function_t format_vnet_crypto_op_status;
 unformat_function_t unformat_vnet_crypto_alg;
 
+format_function_t format_vnet_crypto_async_op;
+format_function_t format_vnet_crypto_async_alg;
+format_function_t format_vnet_crypto_async_op_type;
+
 static_always_inline void
 vnet_crypto_op_init (vnet_crypto_op_t * op, vnet_crypto_op_id_t type)
 {
@@ -318,6 +512,119 @@ vnet_crypto_set_handler (char *alg_name, char *engine)
   return vnet_crypto_set_handler2 (alg_name, engine, CRYPTO_OP_BOTH);
 }
 
+/** async crypto inline functions **/
+
+static_always_inline vnet_crypto_async_frame_t *
+vnet_crypto_async_get_frame (vlib_main_t * vm, vnet_crypto_async_op_id_t opt)
+{
+  vnet_crypto_main_t *cm = &crypto_main;
+  vnet_crypto_thread_t *ct = cm->threads + vm->thread_index;
+  vnet_crypto_async_frame_t *f = ct->frames[opt];
+
+  if (!f)
+    {
+      pool_get_aligned (ct->frame_pool, f, CLIB_CACHE_LINE_BYTES);
+      if (CLIB_DEBUG > 0)
+	clib_memset (f, 0xfe, sizeof (*f));
+      f->state = VNET_CRYPTO_FRAME_STATE_NOT_PROCESSED;
+      f->op = opt;
+      f->n_elts = 0;
+      ct->frames[opt] = f;
+    }
+  return f;
+}
+
+static_always_inline void
+vnet_crypto_async_free_frame (vlib_main_t * vm,
+			      vnet_crypto_async_frame_t * frame)
+{
+  vnet_crypto_main_t *cm = &crypto_main;
+  vnet_crypto_thread_t *ct = cm->threads + vm->thread_index;
+  pool_put (ct->frame_pool, frame);
+}
+
+static_always_inline int
+vnet_crypto_async_submit_open_frame (vlib_main_t * vm,
+				     vnet_crypto_async_frame_t * frame)
+{
+  vnet_crypto_main_t *cm = &crypto_main;
+  vnet_crypto_thread_t *ct = cm->threads + vm->thread_index;
+  vnet_crypto_async_op_id_t opt = frame->op;
+  int ret = (cm->enqueue_handlers[frame->op]) (vm, frame);
+  clib_bitmap_set_no_check (cm->async_active_ids, opt, 1);
+  if (PREDICT_TRUE (ret == 0))
+    {
+      vnet_crypto_async_frame_t *nf = 0;
+      frame->state = VNET_CRYPTO_FRAME_STATE_WORK_IN_PROGRESS;
+      pool_get_aligned (ct->frame_pool, nf, CLIB_CACHE_LINE_BYTES);
+      if (CLIB_DEBUG > 0)
+	clib_memset (nf, 0xfe, sizeof (*nf));
+      nf->state = VNET_CRYPTO_FRAME_STATE_NOT_PROCESSED;
+      nf->op = opt;
+      nf->n_elts = 0;
+      ct->frames[opt] = nf;
+    }
+  return ret;
+}
+
+static_always_inline int
+vnet_crypto_async_add_to_frame (vlib_main_t * vm,
+				vnet_crypto_async_frame_t ** frame,
+				u32 key_index,
+				u32 crypto_len, i16 integ_len_adj,
+				i16 crypto_start_offset,
+				u16 integ_start_offset,
+				u32 buffer_index,
+				u16 next_node,
+				u8 * iv, u8 * tag, u8 * aad, u8 flags)
+{
+  vnet_crypto_async_frame_t *f = *frame;
+  vnet_crypto_async_frame_elt_t *fe;
+  u16 index;
+
+  if (PREDICT_FALSE (f->n_elts == VNET_CRYPTO_FRAME_SIZE))
+    {
+      vnet_crypto_async_op_id_t opt = f->op;
+      int ret;
+      ret = vnet_crypto_async_submit_open_frame (vm, f);
+      if (PREDICT_FALSE (ret < 0))
+	return -1;
+      f = vnet_crypto_async_get_frame (vm, opt);
+      *frame = f;
+    }
+
+  index = f->n_elts;
+  fe = &f->elts[index];
+  f->n_elts++;
+  fe->key_index = key_index;
+  fe->crypto_total_length = crypto_len;
+  fe->crypto_start_offset = crypto_start_offset;
+  fe->integ_start_offset = integ_start_offset;
+  fe->integ_length_adj = integ_len_adj;
+  fe->iv = iv;
+  fe->tag = tag;
+  fe->aad = aad;
+  fe->flags = flags;
+  f->buffer_indices[index] = buffer_index;
+  f->next_node_index[index] = next_node;
+
+  return 0;
+}
+
+static_always_inline void
+vnet_crypto_async_reset_frame (vnet_crypto_async_frame_t * f)
+{
+  vnet_crypto_async_op_id_t opt;
+  ASSERT (f != 0);
+  ASSERT (f->state == VNET_CRYPTO_FRAME_STATE_NOT_PROCESSED);
+  opt = f->op;
+  if (CLIB_DEBUG > 0)
+    clib_memset (f, 0xfe, sizeof (*f));
+  f->state = VNET_CRYPTO_FRAME_STATE_NOT_PROCESSED;
+  f->op = opt;
+  f->n_elts = 0;
+}
+
 #endif /* included_vnet_crypto_crypto_h */
 
 /*
diff --git a/src/vnet/crypto/format.c b/src/vnet/crypto/format.c
index 715941e0ee7..b58ab7fceb2 100644
--- a/src/vnet/crypto/format.c
+++ b/src/vnet/crypto/format.c
@@ -105,6 +105,61 @@ format_vnet_crypto_engine (u8 * s, va_list * args)
   return format (s, "%s", e->name);
 }
 
+u8 *
+format_vnet_crypto_async_op_type (u8 * s, va_list * args)
+{
+  vnet_crypto_async_op_type_t opt =
+    va_arg (*args, vnet_crypto_async_op_type_t);
+  char *strings[] = {
+#define _(n, s) [VNET_CRYPTO_ASYNC_OP_TYPE_##n] = s,
+    foreach_crypto_async_op_type
+#undef _
+  };
+
+  if (opt >= VNET_CRYPTO_ASYNC_OP_N_TYPES)
+    return format (s, "unknown");
+
+  return format (s, "%s", strings[opt]);
+}
+
+u8 *
+format_vnet_crypto_async_alg (u8 * s, va_list * args)
+{
+  vnet_crypto_async_alg_t alg = va_arg (*args, vnet_crypto_async_alg_t);
+  vnet_crypto_main_t *cm = &crypto_main;
+  vnet_crypto_async_alg_data_t *d = vec_elt_at_index (cm->async_algs, alg);
+  return format (s, "%s", d->name);
+}
+
+u8 *
+format_vnet_crypto_async_op (u8 * s, va_list * args)
+{
+  vnet_crypto_main_t *cm = &crypto_main;
+  vnet_crypto_async_op_id_t op = va_arg (*args, int);	// vnet_crypto_op_id_t);
+  vnet_crypto_async_op_data_t *otd = cm->async_opt_data + op;
+
+  return format (s, "%U-%U", format_vnet_crypto_async_op_type, otd->type,
+		 format_vnet_crypto_async_alg, otd->alg);
+
+  vnet_crypto_async_op_id_t opt = va_arg (*args, vnet_crypto_async_op_id_t);
+  char *strings[] = {
+#define _(n, s, k, t, a) \
+		[VNET_CRYPTO_OP_##n##_TAG##t##_AAD##a##_ENC] = s "-enc", \
+		[VNET_CRYPTO_OP_##n##_TAG##t##_AAD##a##_DEC] = s "-dec",
+    foreach_crypto_aead_async_alg
+#undef _
+#define _(c, h, s, k ,d) \
+		[VNET_CRYPTO_OP_##c##_##h##_TAG##d##_ENC] = s "-enc", \
+		[VNET_CRYPTO_OP_##c##_##h##_TAG##d##_DEC] = s "-dec",
+      foreach_crypto_link_async_alg
+#undef _
+  };
+
+  if (opt >= VNET_CRYPTO_ASYNC_OP_N_IDS)
+    return format (s, "unknown");
+
+  return format (s, "%s", strings[opt]);
+}
 
 /*
  * fd.io coding-style-patch-verification: ON
diff --git a/src/vnet/crypto/node.c b/src/vnet/crypto/node.c
new file mode 100644
index 00000000000..51ee63d1d62
--- /dev/null
+++ b/src/vnet/crypto/node.c
@@ -0,0 +1,184 @@
+/*
+ * Copyright (c) 2020 Cisco 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 <stdbool.h>
+#include <vlib/vlib.h>
+#include <vnet/crypto/crypto.h>
+
+typedef enum
+{
+#define _(sym,str) VNET_CRYPTO_ASYNC_ERROR_##sym,
+  foreach_crypto_op_status
+#undef _
+    VNET_CRYPTO_ASYNC_N_ERROR,
+} vnet_crypto_async_error_t;
+
+static char *vnet_crypto_async_error_strings[] = {
+#define _(sym,string) string,
+  foreach_crypto_op_status
+#undef _
+};
+
+#define foreach_crypto_dispatch_next \
+  _(ERR_DROP, "error-drop")
+
+typedef enum
+{
+#define _(n, s) CRYPTO_DISPATCH_NEXT_##n,
+  foreach_crypto_dispatch_next
+#undef _
+    CRYPTO_DISPATCH_N_NEXT,
+} crypto_dispatch_next_t;
+
+typedef struct
+{
+  vnet_crypto_op_status_t op_status;
+  vnet_crypto_async_op_id_t op;
+} crypto_dispatch_trace_t;
+
+static u8 *
+format_crypto_dispatch_trace (u8 * s, va_list * args)
+{
+  CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
+  CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
+  crypto_dispatch_trace_t *t = va_arg (*args, crypto_dispatch_trace_t *);
+
+  s = format (s, "%U: %U", format_vnet_crypto_async_op, t->op,
+	      format_vnet_crypto_op_status, t->op_status);
+  return s;
+}
+
+static void
+vnet_crypto_async_add_trace (vlib_main_t * vm, vlib_node_runtime_t * node,
+			     vlib_buffer_t * b,
+			     vnet_crypto_async_op_id_t op_id,
+			     vnet_crypto_op_status_t status)
+{
+  crypto_dispatch_trace_t *tr = vlib_add_trace (vm, node, b, sizeof (*tr));
+  tr->op_status = status;
+  tr->op = op_id;
+}
+
+static_always_inline u32
+crypto_dequeue_frame (vlib_main_t * vm, vlib_node_runtime_t * node,
+		      vnet_crypto_thread_t * ct,
+		      vnet_crypto_frame_dequeue_t * hdl,
+		      u32 n_cache, u32 * n_total)
+{
+  vnet_crypto_async_frame_t *cf = (hdl) (vm);
+
+  while (cf)
+    {
+      vec_validate (ct->buffer_indice, n_cache + cf->n_elts);
+      vec_validate (ct->nexts, n_cache + cf->n_elts);
+      clib_memcpy_fast (ct->buffer_indice + n_cache, cf->buffer_indices,
+			sizeof (u32) * cf->n_elts);
+      if (cf->state == VNET_CRYPTO_FRAME_STATE_SUCCESS)
+	{
+	  clib_memcpy_fast (ct->nexts + n_cache, cf->next_node_index,
+			    sizeof (u16) * cf->n_elts);
+	}
+      else
+	{
+	  u32 i;
+	  for (i = 0; i < cf->n_elts; i++)
+	    {
+	      if (cf->elts[i].status != VNET_CRYPTO_OP_STATUS_COMPLETED)
+		{
+		  ct->nexts[i + n_cache] = CRYPTO_DISPATCH_NEXT_ERR_DROP;
+		  vlib_node_increment_counter (vm, node->node_index,
+					       cf->elts[i].status, 1);
+		}
+	      else
+		ct->nexts[i + n_cache] = cf->next_node_index[i];
+	    }
+	}
+      n_cache += cf->n_elts;
+      *n_total += cf->n_elts;
+      if (n_cache >= VLIB_FRAME_SIZE)
+	{
+	  vlib_buffer_enqueue_to_next (vm, node, ct->buffer_indice, ct->nexts,
+				       n_cache);
+	  n_cache = 0;
+	}
+
+      if (PREDICT_FALSE (node->flags & VLIB_NODE_FLAG_TRACE))
+	{
+	  u32 i;
+
+	  for (i = 0; i < cf->n_elts; i++)
+	    {
+	      vlib_buffer_t *b = vlib_get_buffer (vm, cf->buffer_indices[i]);
+	      if (b->flags & VLIB_BUFFER_IS_TRACED)
+		vnet_crypto_async_add_trace (vm, node, b, cf->op,
+					     cf->elts[i].status);
+	    }
+	}
+      vnet_crypto_async_free_frame (vm, cf);
+      cf = (hdl) (vm);
+    }
+
+  return n_cache;
+}
+
+VLIB_NODE_FN (crypto_dispatch_node) (vlib_main_t * vm,
+				     vlib_node_runtime_t * node,
+				     vlib_frame_t * frame)
+{
+  vnet_crypto_main_t *cm = &crypto_main;
+  vnet_crypto_thread_t *ct = cm->threads + vm->thread_index;
+  u32 n_dispatched = 0, n_cache = 0;
+  u32 index;
+
+  /* *INDENT-OFF* */
+  clib_bitmap_foreach (index, cm->async_active_ids, ({
+    n_cache = crypto_dequeue_frame (vm, node, ct, cm->dequeue_handlers[index],
+				    n_cache, &n_dispatched);
+  }));
+  /* *INDENT-ON* */
+  if (n_cache)
+    vlib_buffer_enqueue_to_next (vm, node, ct->buffer_indice, ct->nexts,
+				 n_cache);
+
+  return n_dispatched;
+}
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (crypto_dispatch_node) = {
+  .name = "crypto-dispatch",
+  .type = VLIB_NODE_TYPE_INPUT,
+  .state = VLIB_NODE_STATE_DISABLED,
+  .format_trace = format_crypto_dispatch_trace,
+
+  .n_errors = ARRAY_LEN(vnet_crypto_async_error_strings),
+  .error_strings = vnet_crypto_async_error_strings,
+
+  .n_next_nodes = CRYPTO_DISPATCH_N_NEXT,
+  .next_nodes = {
+#define _(n, s) \
+  [CRYPTO_DISPATCH_NEXT_##n] = s,
+      foreach_crypto_dispatch_next
+#undef _
+  },
+};
+/* *INDENT-ON* */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */