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

1 files changed, 184 insertions, 0 deletions

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:
+ */