avf: use atomic store instead of barrier

[vpp.git] / src / plugins / avf / input.c

diff --git a/src/plugins/avf/input.c b/src/plugins/avf/input.c
index fcc5518..9d677ab 100644 (file)
--- a/src/plugins/avf/input.c
+++ b/src/plugins/avf/input.c
@@ -125,8 +125,7 @@ avf_rxq_refill (vlib_main_t * vm, vlib_node_runtime_t * node, avf_rxq_t * rxq,
       n_alloc -= 8;
     }
 
-  CLIB_MEMORY_STORE_BARRIER ();
-  *(rxq->qrx_tail) = slot;
+  clib_atomic_store_rel_n (rxq->qrx_tail, slot);
 }
 
 
@@ -364,12 +363,6 @@ no_more_desc:
   or_qw1 |= or_q1x4[0] | or_q1x4[1] | or_q1x4[2] | or_q1x4[3];
 #endif
 
-  /* refill rx ring */
-  if (ad->flags & AVF_DEVICE_F_VA_DMA)
-    avf_rxq_refill (vm, node, rxq, 1 /* use_va_dma */ );
-  else
-    avf_rxq_refill (vm, node, rxq, 0 /* use_va_dma */ );
-
   vlib_get_buffers (vm, to_next, ptd->bufs, n_rx_packets);
 
   vnet_buffer (bt)->sw_if_index[VLIB_RX] = ad->sw_if_index;
@@ -396,6 +389,7 @@ no_more_desc:
          vlib_trace_buffer (vm, node, next_index, b, /* follow_chain */ 0);
          tr = vlib_add_trace (vm, node, b, sizeof (*tr));
          tr->next_index = next_index;
+         tr->qid = qid;
          tr->hw_if_index = ad->hw_if_index;
          tr->qw1s[0] = ptd->qw1s[i];
          for (j = 1; j < AVF_RX_MAX_DESC_IN_CHAIN; j++)
@@ -436,6 +430,12 @@ no_more_desc:
                                   ad->hw_if_index, n_rx_packets, n_rx_bytes);
 
 done:
+  /* refill rx ring */
+  if (ad->flags & AVF_DEVICE_F_VA_DMA)
+    avf_rxq_refill (vm, node, rxq, 1 /* use_va_dma */ );
+  else
+    avf_rxq_refill (vm, node, rxq, 0 /* use_va_dma */ );
+
   return n_rx_packets;
 }
 
@@ -443,14 +443,13 @@ VLIB_NODE_FN (avf_input_node) (vlib_main_t * vm, vlib_node_runtime_t * node,
                               vlib_frame_t * frame)
 {
   u32 n_rx = 0;
-  avf_main_t *am = &avf_main;
   vnet_device_input_runtime_t *rt = (void *) node->runtime_data;
   vnet_device_and_queue_t *dq;
 
   foreach_device_and_queue (dq, rt->devices_and_queues)
   {
     avf_device_t *ad;
-    ad = vec_elt_at_index (am->devices, dq->dev_instance);
+    ad = avf_get_device (dq->dev_instance);
     if ((ad->flags & AVF_DEVICE_F_ADMIN_UP) == 0)
       continue;
     n_rx += avf_device_input_inline (vm, node, frame, ad, dq->queue_id);
@@ -467,6 +466,7 @@ VLIB_REGISTER_NODE (avf_input_node) = {
   .state = VLIB_NODE_STATE_DISABLED,
   .n_errors = AVF_INPUT_N_ERROR,
   .error_strings = avf_input_error_strings,
+  .flags = VLIB_NODE_FLAG_TRACE_SUPPORTED,
 };
 
 /* *INDENT-ON* */