1 files changed, 88 insertions, 0 deletions
diff --git a/src/vnet/devices/virtio/virtio_process.c b/src/vnet/devices/virtio/virtio_process.c
new file mode 100644
index 00000000000..7a25611bb95
--- /dev/null
+++ b/src/vnet/devices/virtio/virtio_process.c
@@ -0,0 +1,88 @@
+/*
+ *------------------------------------------------------------------
+ * 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 <vlib/vlib.h>
+#include <vnet/devices/virtio/virtio.h>
+#include <vnet/gso/gro_func.h>
+
+static uword
+virtio_send_interrupt_process (vlib_main_t * vm,
+			       vlib_node_runtime_t * rt, vlib_frame_t * f)
+{
+  virtio_if_t *vif;
+  f64 timeout = 3153600000.0 /* 100 years */ ;
+  uword event_type, *event_data = 0;
+  virtio_main_t *vim = &virtio_main;
+
+  while (1)
+    {
+      vlib_process_wait_for_event_or_clock (vm, timeout);
+      event_type = vlib_process_get_events (vm, &event_data);
+      vec_reset_length (event_data);
+
+      switch (event_type)
+	{
+	case VIRTIO_EVENT_STOP_TIMER:
+	  timeout = 3153600000.0;
+	  break;
+
+	case VIRTIO_EVENT_START_TIMER:
+	  timeout = 1e-3;	/* 1 millisecond */
+	  break;
+
+	case ~0:
+          /* *INDENT-OFF* */
+          pool_foreach (vif, vim->interfaces, {
+              if (vif->packet_coalesce || vif->packet_buffering)
+                {
+                  virtio_vring_t *vring;
+                  vec_foreach (vring, vif->rxq_vrings)
+                  {
+                    if (vring->mode == VNET_HW_IF_RX_MODE_INTERRUPT ||
+                        vring->mode == VNET_HW_IF_RX_MODE_ADAPTIVE)
+                      vnet_device_input_set_interrupt_pending (
+                                             vnet_get_main (), vif->hw_if_index,
+                                             RX_QUEUE_ACCESS (vring->queue_id));
+                  }
+                }
+          });
+          /* *INDENT-ON* */
+	  break;
+
+	default:
+	  clib_warning ("BUG: unhandled event type %d", event_type);
+	  break;
+	}
+    }
+  return 0;
+}
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (virtio_send_interrupt_node) = {
+    .function = virtio_send_interrupt_process,
+    .type = VLIB_NODE_TYPE_PROCESS,
+    .name = "virtio-send-interrupt-process",
+};
+/* *INDENT-ON* */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */