+static clib_error_t *
+dpdk_rx_read_ready (clib_file_t *uf)
+{
+ vnet_main_t *vnm = vnet_get_main ();
+ dpdk_main_t *dm = &dpdk_main;
+ u32 qidx = uf->private_data;
+ vnet_hw_if_rx_queue_t *rxq = vnet_hw_if_get_rx_queue (vnm, qidx);
+ dpdk_device_t *xd = vec_elt_at_index (dm->devices, rxq->dev_instance);
+
+ u64 b;
+ CLIB_UNUSED (ssize_t size) = read (uf->file_descriptor, &b, sizeof (b));
+ if (rxq->mode != VNET_HW_IF_RX_MODE_POLLING)
+ {
+ vnet_hw_if_rx_queue_set_int_pending (vnm, uf->private_data);
+ rte_eth_dev_rx_intr_enable (xd->port_id, rxq->queue_id);
+ }
+
+ return 0;
+}
+
+static void
+dpdk_setup_interrupts (dpdk_device_t *xd)
+{
+ vnet_main_t *vnm = vnet_get_main ();
+ vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, xd->hw_if_index);
+ if (!hi)
+ return;
+
+ if (!xd->port_conf.intr_conf.rxq)
+ return;
+
+ /* Probe for interrupt support */
+ if (rte_eth_dev_rx_intr_enable (xd->port_id, 0))
+ {
+ dpdk_log_info ("probe for interrupt mode for device %U. Failed.\n",
+ format_dpdk_device_name, xd->port_id);
+ }
+ else
+ {
+ xd->flags |= DPDK_DEVICE_FLAG_INT_SUPPORTED;
+ rte_eth_dev_rx_intr_disable (xd->port_id, 0);
+ dpdk_log_info ("Probe for interrupt mode for device %U. Success.\n",
+ format_dpdk_device_name, xd->port_id);
+ }
+
+ if (xd->flags & DPDK_DEVICE_FLAG_INT_SUPPORTED)
+ {
+ hi->flags |= VNET_HW_INTERFACE_FLAG_SUPPORTS_INT_MODE;
+ for (int q = 0; q < xd->rx_q_used; q++)
+ {
+ dpdk_rx_queue_t *rxq = vec_elt_at_index (xd->rx_queues, q);
+ clib_file_t f = { 0 };
+ rxq->efd = rte_eth_dev_rx_intr_ctl_q_get_fd (xd->port_id, q);
+ if (rxq->efd < 0)
+ {
+ xd->flags &= ~DPDK_DEVICE_FLAG_INT_SUPPORTED;
+ hi->flags &= ~VNET_HW_INTERFACE_FLAG_SUPPORTS_INT_MODE;
+ break;
+ }
+ f.read_function = dpdk_rx_read_ready;
+ f.flags = UNIX_FILE_EVENT_EDGE_TRIGGERED;
+ f.file_descriptor = rxq->efd;
+ f.private_data = rxq->queue_index;
+ f.description =
+ format (0, "%U queue %u", format_dpdk_device_name, xd->port_id, q);
+ rxq->clib_file_index = clib_file_add (&file_main, &f);
+ vnet_hw_if_set_rx_queue_file_index (vnm, rxq->queue_index,
+ rxq->clib_file_index);
+ }
+ }
+ vnet_hw_if_update_runtime_data (vnm, xd->hw_if_index);
+}
+