X-Git-Url: https://gerrit.fd.io/r/gitweb?a=blobdiff_plain;f=src%2Fplugins%2Favf%2Finput.c;h=8072e94346b422cd9d4454f822545de59ea93248;hb=c879c149d66d556b9b8183374c601004cecbf982;hp=931bfa39de94f60a909e7b6b919ce188931bb7cc;hpb=d4ac4bb26618053b1960dcdf963225884af54d4f;p=vpp.git

diff --git a/src/plugins/avf/input.c b/src/plugins/avf/input.c
index 931bfa39de9..8072e94346b 100644
--- a/src/plugins/avf/input.c
+++ b/src/plugins/avf/input.c
@@ -24,8 +24,7 @@
 #include <avf/avf.h>
 
 #define foreach_avf_input_error \
-  _(BUFFER_ALLOC, "buffer alloc error") \
-  _(RX_PACKET_ERROR, "Rx packet errors")
+  _(BUFFER_ALLOC, "buffer alloc error")
 
 typedef enum
 {
@@ -41,110 +40,192 @@ static __clib_unused char *avf_input_error_strings[] = {
 #undef _
 };
 
-#define AVF_RX_DESC_STATUS(x)		(1 << x)
-#define AVF_RX_DESC_STATUS_DD		AVF_RX_DESC_STATUS(0)
-#define AVF_RX_DESC_STATUS_EOP		AVF_RX_DESC_STATUS(1)
+#define AVF_INPUT_REFILL_TRESHOLD 32
 
 static_always_inline void
-avf_input_trace (vlib_main_t * vm, vlib_node_runtime_t * node, u32 next0,
-		 vlib_buffer_t * b0, uword * n_trace, avf_device_t * ad,
-		 avf_rx_vector_entry_t * rxve)
+avf_rx_desc_write (avf_rx_desc_t * d, u64 addr)
 {
-  avf_input_trace_t *tr;
-  vlib_trace_buffer (vm, node, next0, b0, /* follow_chain */ 0);
-  vlib_set_trace_count (vm, node, --(*n_trace));
-  tr = vlib_add_trace (vm, node, b0, sizeof (*tr));
-  tr->next_index = next0;
-  tr->hw_if_index = ad->hw_if_index;
-  clib_memcpy (&tr->rxve, rxve, sizeof (avf_rx_vector_entry_t));
+#ifdef CLIB_HAVE_VEC256
+  u64x4 v = { addr, 0, 0, 0 };
+  u64x4_store_unaligned (v, (void *) d);
+#else
+  d->qword[0] = addr;
+  d->qword[1] = 0;
+#endif
 }
 
-#define AVF_INPUT_REFILL_TRESHOLD 32
 static_always_inline void
 avf_rxq_refill (vlib_main_t * vm, vlib_node_runtime_t * node, avf_rxq_t * rxq,
-		int use_iova)
+		int use_va_dma)
 {
-  u16 n_refill, mask, n_alloc, slot;
-  avf_rx_desc_t *d;
-
-  n_refill = rxq->size - 1 - rxq->n_bufs;
+  u16 n_refill, mask, n_alloc, slot, size;
+  vlib_buffer_t *b[8];
+  avf_rx_desc_t *d, *first_d;
+  void *p[8];
+
+  size = rxq->size;
+  mask = size - 1;
+  n_refill = mask - rxq->n_enqueued;
   if (PREDICT_TRUE (n_refill <= AVF_INPUT_REFILL_TRESHOLD))
     return;
 
-  mask = rxq->size - 1;
   slot = (rxq->next - n_refill - 1) & mask;
 
   n_refill &= ~7;		/* round to 8 */
-  n_alloc = vlib_buffer_alloc_to_ring (vm, rxq->bufs, slot, rxq->size,
-				       n_refill);
+  n_alloc = vlib_buffer_alloc_to_ring (vm, rxq->bufs, slot, size, n_refill);
 
   if (PREDICT_FALSE (n_alloc != n_refill))
     {
       vlib_error_count (vm, node->node_index,
 			AVF_INPUT_ERROR_BUFFER_ALLOC, 1);
       if (n_alloc)
-	vlib_buffer_free (vm, rxq->bufs + slot, n_alloc);
+	vlib_buffer_free_from_ring (vm, rxq->bufs, slot, size, n_alloc);
       return;
     }
 
-  rxq->n_bufs += n_alloc;
+  rxq->n_enqueued += n_alloc;
+  first_d = rxq->descs;
+
+  ASSERT (slot % 8 == 0);
 
-  while (n_alloc--)
+  while (n_alloc >= 8)
     {
-      u64 addr;
-      d = ((avf_rx_desc_t *) rxq->descs) + slot;
-      if (use_iova)
+      d = first_d + slot;
+
+      if (use_va_dma)
 	{
-	  vlib_buffer_t *b = vlib_get_buffer (vm, rxq->bufs[slot]);
-	  addr = pointer_to_uword (b->data);
+	  vlib_get_buffers_with_offset (vm, rxq->bufs + slot, p, 8,
+					sizeof (vlib_buffer_t));
+	  avf_rx_desc_write (d + 0, pointer_to_uword (p[0]));
+	  avf_rx_desc_write (d + 1, pointer_to_uword (p[1]));
+	  avf_rx_desc_write (d + 2, pointer_to_uword (p[2]));
+	  avf_rx_desc_write (d + 3, pointer_to_uword (p[3]));
+	  avf_rx_desc_write (d + 4, pointer_to_uword (p[4]));
+	  avf_rx_desc_write (d + 5, pointer_to_uword (p[5]));
+	  avf_rx_desc_write (d + 6, pointer_to_uword (p[6]));
+	  avf_rx_desc_write (d + 7, pointer_to_uword (p[7]));
 	}
       else
-	addr = vlib_get_buffer_data_physical_address (vm, rxq->bufs[slot]);
-      d->qword[0] = addr;
-      d->qword[1] = 0;
-      slot = (slot + 1) & mask;
+	{
+	  vlib_get_buffers (vm, rxq->bufs + slot, b, 8);
+	  avf_rx_desc_write (d + 0, vlib_buffer_get_pa (vm, b[0]));
+	  avf_rx_desc_write (d + 1, vlib_buffer_get_pa (vm, b[1]));
+	  avf_rx_desc_write (d + 2, vlib_buffer_get_pa (vm, b[2]));
+	  avf_rx_desc_write (d + 3, vlib_buffer_get_pa (vm, b[3]));
+	  avf_rx_desc_write (d + 4, vlib_buffer_get_pa (vm, b[4]));
+	  avf_rx_desc_write (d + 5, vlib_buffer_get_pa (vm, b[5]));
+	  avf_rx_desc_write (d + 6, vlib_buffer_get_pa (vm, b[6]));
+	  avf_rx_desc_write (d + 7, vlib_buffer_get_pa (vm, b[7]));
+	}
+
+      /* next */
+      slot = (slot + 8) & mask;
+      n_alloc -= 8;
     }
 
-  CLIB_MEMORY_BARRIER ();
+  CLIB_MEMORY_STORE_BARRIER ();
   *(rxq->qrx_tail) = slot;
 }
 
-static_always_inline void
-avf_check_for_error (vlib_node_runtime_t * node, avf_rx_vector_entry_t * rxve,
-		     vlib_buffer_t * b, u32 * next)
+
+static_always_inline uword
+avf_rx_attach_tail (vlib_main_t * vm, vlib_buffer_t * bt, vlib_buffer_t * b,
+		    u64 qw1, avf_rx_tail_t * t)
 {
-  avf_main_t *am = &avf_main;
-  avf_ptype_t *ptype;
-  if (PREDICT_FALSE (rxve->error))
+  vlib_buffer_t *hb = b;
+  u32 tlnifb = 0, i = 0;
+
+  if (qw1 & AVF_RXD_STATUS_EOP)
+    return 0;
+
+  while ((qw1 & AVF_RXD_STATUS_EOP) == 0)
     {
-      b->error = node->errors[AVF_INPUT_ERROR_RX_PACKET_ERROR];
-      ptype = am->ptypes + rxve->ptype;
-      /* retract */
-      vlib_buffer_advance (b, --ptype->buffer_advance);
-      *next = VNET_DEVICE_INPUT_NEXT_DROP;
+      ASSERT (i < AVF_RX_MAX_DESC_IN_CHAIN - 1);
+      ASSERT (qw1 & AVF_RXD_STATUS_DD);
+      qw1 = t->qw1s[i];
+      b->next_buffer = t->buffers[i];
+      b->flags |= VLIB_BUFFER_NEXT_PRESENT;
+      b = vlib_get_buffer (vm, b->next_buffer);
+      clib_memcpy_fast (b, bt, sizeof (vlib_buffer_t));
+      tlnifb += b->current_length = qw1 >> AVF_RXD_LEN_SHIFT;
+      i++;
     }
+
+  hb->total_length_not_including_first_buffer = tlnifb;
+  hb->flags |= VLIB_BUFFER_TOTAL_LENGTH_VALID;
+  return tlnifb;
 }
 
-static_always_inline u32
-avf_find_next (avf_rx_vector_entry_t * rxve, vlib_buffer_t * b,
-	       int maybe_tagged)
+static_always_inline uword
+avf_process_rx_burst (vlib_main_t * vm, vlib_node_runtime_t * node,
+		      avf_per_thread_data_t * ptd, u32 n_left,
+		      int maybe_multiseg)
 {
-  avf_main_t *am = &avf_main;
-  ethernet_header_t *e = (ethernet_header_t *) b->data;
-  avf_ptype_t *ptype;
-  if (maybe_tagged && ethernet_frame_is_tagged (e->type))
-    return VNET_DEVICE_INPUT_NEXT_ETHERNET_INPUT;
-  ptype = am->ptypes + rxve->ptype;
-  vlib_buffer_advance (b, ptype->buffer_advance);
-  b->flags |= ptype->flags;
-  return ptype->next_node;
-}
+  vlib_buffer_t *bt = &ptd->buffer_template;
+  vlib_buffer_t **b = ptd->bufs;
+  u64 *qw1 = ptd->qw1s;
+  avf_rx_tail_t *tail = ptd->tails;
+  uword n_rx_bytes = 0;
 
+  while (n_left >= 4)
+    {
+      if (n_left >= 12)
+	{
+	  vlib_prefetch_buffer_header (b[8], LOAD);
+	  vlib_prefetch_buffer_header (b[9], LOAD);
+	  vlib_prefetch_buffer_header (b[10], LOAD);
+	  vlib_prefetch_buffer_header (b[11], LOAD);
+	}
+
+      clib_memcpy64_x4 (b[0], b[1], b[2], b[3], bt);
+
+      n_rx_bytes += b[0]->current_length = qw1[0] >> AVF_RXD_LEN_SHIFT;
+      n_rx_bytes += b[1]->current_length = qw1[1] >> AVF_RXD_LEN_SHIFT;
+      n_rx_bytes += b[2]->current_length = qw1[2] >> AVF_RXD_LEN_SHIFT;
+      n_rx_bytes += b[3]->current_length = qw1[3] >> AVF_RXD_LEN_SHIFT;
+
+      if (maybe_multiseg)
+	{
+	  n_rx_bytes += avf_rx_attach_tail (vm, bt, b[0], qw1[0], tail + 0);
+	  n_rx_bytes += avf_rx_attach_tail (vm, bt, b[1], qw1[1], tail + 1);
+	  n_rx_bytes += avf_rx_attach_tail (vm, bt, b[2], qw1[2], tail + 2);
+	  n_rx_bytes += avf_rx_attach_tail (vm, bt, b[3], qw1[3], tail + 3);
+	}
+
+      VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b[0]);
+      VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b[1]);
+      VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b[2]);
+      VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b[3]);
+
+      /* next */
+      qw1 += 4;
+      tail += 4;
+      b += 4;
+      n_left -= 4;
+    }
+  while (n_left)
+    {
+      clib_memcpy_fast (b[0], bt, sizeof (vlib_buffer_t));
+
+      n_rx_bytes += b[0]->current_length = qw1[0] >> AVF_RXD_LEN_SHIFT;
+
+      if (maybe_multiseg)
+	n_rx_bytes += avf_rx_attach_tail (vm, bt, b[0], qw1[0], tail + 0);
+
+      VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b[0]);
+
+      /* next */
+      qw1 += 1;
+      tail += 1;
+      b += 1;
+      n_left -= 1;
+    }
+  return n_rx_bytes;
+}
 
 static_always_inline uword
 avf_device_input_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
-			 vlib_frame_t * frame, avf_device_t * ad, u16 qid,
-			 int with_features_or_tracing)
+			 vlib_frame_t * frame, avf_device_t * ad, u16 qid)
 {
   avf_main_t *am = &avf_main;
   vnet_main_t *vnm = vnet_get_main ();
@@ -152,231 +233,198 @@ avf_device_input_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
   avf_per_thread_data_t *ptd =
     vec_elt_at_index (am->per_thread_data, thr_idx);
   avf_rxq_t *rxq = vec_elt_at_index (ad->rxqs, qid);
-  avf_rx_vector_entry_t *rxve;
-  uword n_trace = vlib_get_trace_count (vm, node);
+  u32 n_trace, n_rx_packets = 0, n_rx_bytes = 0;
+  u16 n_tail_desc = 0;
+  u64 or_qw1 = 0;
+  u32 *bi, *to_next, n_left_to_next;
+  vlib_buffer_t *bt = &ptd->buffer_template;
   u32 next_index = VNET_DEVICE_INPUT_NEXT_ETHERNET_INPUT;
-  avf_rx_desc_t *d;
-  u32 *to_next = 0;
-  u32 n_rx_packets = 0;
-  u32 n_rx_bytes = 0;
-  u32 sw_if_idx[VLIB_N_RX_TX] = {[VLIB_RX] = ad->sw_if_index,[VLIB_TX] = ~0 };
-  u16 mask = rxq->size - 1;
-  u16 n_rxv = 0;
-  u8 maybe_error = 0;
+  u16 next = rxq->next;
+  u16 size = rxq->size;
+  u16 mask = size - 1;
+  avf_rx_desc_t *d, *fd = rxq->descs;
+#ifdef CLIB_HAVE_VEC256
+  u64x4 q1x4, or_q1x4 = { 0 };
+  u64x4 dd_eop_mask4 = u64x4_splat (AVF_RXD_STATUS_DD | AVF_RXD_STATUS_EOP);
+#endif
+
+  /* is there anything on the ring */
+  d = fd + next;
+  if ((d->qword[1] & AVF_RXD_STATUS_DD) == 0)
+    goto done;
+
+  if (PREDICT_FALSE (ad->per_interface_next_index != ~0))
+    next_index = ad->per_interface_next_index;
+  vlib_get_new_next_frame (vm, node, next_index, to_next, n_left_to_next);
 
   /* fetch up to AVF_RX_VECTOR_SZ from the rx ring, unflatten them and
      copy needed data from descriptor to rx vector */
-  d = rxq->descs + rxq->next;
-  while ((d->qword[1] & AVF_RX_DESC_STATUS_DD) && n_rxv < AVF_RX_VECTOR_SZ)
-    {
-      u16 next_pf = (rxq->next + 8) & mask;
-      CLIB_PREFETCH (rxq->descs + next_pf, CLIB_CACHE_LINE_BYTES, LOAD);
-      rxve = ptd->rx_vector + n_rxv;
-      rxve->bi = rxq->bufs[rxq->next];
-      rxve->status = avf_get_u64_bits (d, 8, 18, 0);
-      rxve->error = avf_get_u64_bits (d, 8, 26, 19);
-      rxve->ptype = avf_get_u64_bits (d, 8, 37, 30);
-      rxve->length = avf_get_u64_bits (d, 8, 63, 38);
-      maybe_error |= rxve->error;
+  bi = to_next;
 
-      /* deal with chained buffers */
-      while (PREDICT_FALSE ((d->qword[1] & AVF_RX_DESC_STATUS_EOP) == 0))
+  while (n_rx_packets < AVF_RX_VECTOR_SZ)
+    {
+      if (next + 11 < size)
 	{
-	  clib_error ("fixme");
+	  int stride = 8;
+	  CLIB_PREFETCH ((void *) (fd + (next + stride)),
+			 CLIB_CACHE_LINE_BYTES, LOAD);
+	  CLIB_PREFETCH ((void *) (fd + (next + stride + 1)),
+			 CLIB_CACHE_LINE_BYTES, LOAD);
+	  CLIB_PREFETCH ((void *) (fd + (next + stride + 2)),
+			 CLIB_CACHE_LINE_BYTES, LOAD);
+	  CLIB_PREFETCH ((void *) (fd + (next + stride + 3)),
+			 CLIB_CACHE_LINE_BYTES, LOAD);
 	}
 
-      /* next */
-      rxq->next = (rxq->next + 1) & mask;
-      d = rxq->descs + rxq->next;
-      n_rxv++;
-      rxq->n_bufs--;
-    }
+#ifdef CLIB_HAVE_VEC256
+      if (n_rx_packets >= AVF_RX_VECTOR_SZ - 4 || next >= size - 4)
+	goto one_by_one;
 
-  if (n_rxv == 0)
-    return 0;
+      q1x4 = u64x4_gather ((void *) &d[0].qword[1], (void *) &d[1].qword[1],
+			   (void *) &d[2].qword[1], (void *) &d[3].qword[1]);
 
-  /* refill rx ring */
-  if (ad->flags & AVF_DEVICE_F_IOVA)
-    avf_rxq_refill (vm, node, rxq, 1 /* use_iova */ );
-  else
-    avf_rxq_refill (vm, node, rxq, 0 /* use_iova */ );
+      /* not all packets are ready or at least one of them is chained */
+      if (!u64x4_is_equal (q1x4 & dd_eop_mask4, dd_eop_mask4))
+	goto one_by_one;
 
-  n_rx_packets = n_rxv;
-  rxve = ptd->rx_vector;
-  while (n_rxv)
-    {
-      u32 n_left_to_next;
-      u32 bi0, bi1, bi2, bi3;
-      vlib_buffer_t *b0, *b1, *b2, *b3;
-      u32 next0, next1, next2, next3;
+      or_q1x4 |= q1x4;
+      u64x4_store_unaligned (q1x4, ptd->qw1s + n_rx_packets);
+      clib_memcpy_fast (bi, rxq->bufs + next, 4 * sizeof (u32));
 
-      vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
+      /* next */
+      next = (next + 4) & mask;
+      d = fd + next;
+      n_rx_packets += 4;
+      bi += 4;
+      continue;
+    one_by_one:
+#endif
+      CLIB_PREFETCH ((void *) (fd + ((next + 8) & mask)),
+		     CLIB_CACHE_LINE_BYTES, LOAD);
 
-      while (n_rxv >= 12 && n_left_to_next >= 4)
+      if (avf_rxd_is_not_dd (d))
+	break;
+
+      bi[0] = rxq->bufs[next];
+
+      /* deal with chained buffers */
+      if (PREDICT_FALSE (avf_rxd_is_not_eop (d)))
 	{
-	  vlib_buffer_t *p;
-	  p = vlib_get_buffer (vm, rxve[8].bi);
-	  vlib_prefetch_buffer_header (p, LOAD);
-	  CLIB_PREFETCH (p->data, CLIB_CACHE_LINE_BYTES, LOAD);
-
-	  p = vlib_get_buffer (vm, rxve[9].bi);
-	  vlib_prefetch_buffer_header (p, LOAD);
-	  CLIB_PREFETCH (p->data, CLIB_CACHE_LINE_BYTES, LOAD);
-
-	  p = vlib_get_buffer (vm, rxve[10].bi);
-	  vlib_prefetch_buffer_header (p, LOAD);
-	  CLIB_PREFETCH (p->data, CLIB_CACHE_LINE_BYTES, LOAD);
-
-	  p = vlib_get_buffer (vm, rxve[11].bi);
-	  vlib_prefetch_buffer_header (p, LOAD);
-	  CLIB_PREFETCH (p->data, CLIB_CACHE_LINE_BYTES, LOAD);
-
-	  to_next[0] = bi0 = rxve[0].bi;
-	  to_next[1] = bi1 = rxve[1].bi;
-	  to_next[2] = bi2 = rxve[2].bi;
-	  to_next[3] = bi3 = rxve[3].bi;
-
-	  b0 = vlib_get_buffer (vm, bi0);
-	  b1 = vlib_get_buffer (vm, bi1);
-	  b2 = vlib_get_buffer (vm, bi2);
-	  b3 = vlib_get_buffer (vm, bi3);
-
-	  b0->current_length = rxve[0].length;
-	  b1->current_length = rxve[1].length;
-	  b2->current_length = rxve[2].length;
-	  b3->current_length = rxve[3].length;
-
-	  n_rx_bytes += b0->current_length;
-	  n_rx_bytes += b1->current_length;
-	  n_rx_bytes += b2->current_length;
-	  n_rx_bytes += b3->current_length;
-
-	  if (PREDICT_TRUE (ad->per_interface_next_index == ~0))
+	  u16 tail_desc = 0;
+	  u16 tail_next = next;
+	  avf_rx_tail_t *tail = ptd->tails + n_rx_packets;
+	  avf_rx_desc_t *td;
+	  do
 	    {
-	      ethernet_header_t *e0, *e1, *e2, *e3;
-
-	      e0 = (ethernet_header_t *) b0->data;
-	      e1 = (ethernet_header_t *) b1->data;
-	      e2 = (ethernet_header_t *) b2->data;
-	      e3 = (ethernet_header_t *) b3->data;
-
-	      if (ethernet_frame_is_any_tagged_x4 (e0->type, e1->type,
-						   e2->type, e3->type))
-		{
-		  next0 = avf_find_next (rxve, b0, 1);
-		  next1 = avf_find_next (rxve + 1, b1, 1);
-		  next2 = avf_find_next (rxve + 2, b2, 1);
-		  next3 = avf_find_next (rxve + 3, b3, 1);
-		}
-	      else
-		{
-		  next0 = avf_find_next (rxve, b0, 0);
-		  next1 = avf_find_next (rxve + 1, b1, 0);
-		  next2 = avf_find_next (rxve + 2, b2, 0);
-		  next3 = avf_find_next (rxve + 3, b3, 0);
-		}
-
-	      if (with_features_or_tracing)
-		vnet_feature_start_device_input_x4 (ad->sw_if_index, &next0,
-						    &next1, &next2, &next3,
-						    b0, b1, b2, b3);
-
-	      if (PREDICT_FALSE (maybe_error))
-		{
-		  avf_check_for_error (node, rxve + 0, b0, &next0);
-		  avf_check_for_error (node, rxve + 1, b1, &next1);
-		  avf_check_for_error (node, rxve + 2, b2, &next2);
-		  avf_check_for_error (node, rxve + 3, b3, &next3);
-		}
-	    }
-	  else
-	    next0 = next1 = next2 = next3 = ad->per_interface_next_index;
-
-	  clib_memcpy (vnet_buffer (b0)->sw_if_index, sw_if_idx,
-		       sizeof (sw_if_idx));
-	  clib_memcpy (vnet_buffer (b1)->sw_if_index, sw_if_idx,
-		       sizeof (sw_if_idx));
-	  clib_memcpy (vnet_buffer (b2)->sw_if_index, sw_if_idx,
-		       sizeof (sw_if_idx));
-	  clib_memcpy (vnet_buffer (b3)->sw_if_index, sw_if_idx,
-		       sizeof (sw_if_idx));
-
-	  VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b0);
-	  VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b1);
-	  VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b2);
-	  VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b3);
-
-	  if (with_features_or_tracing && PREDICT_FALSE (n_trace))
-	    {
-	      avf_input_trace (vm, node, next0, b0, &n_trace, ad, rxve);
-	      if (n_trace)
-		avf_input_trace (vm, node, next1, b1, &n_trace, ad, rxve + 1);
-	      if (n_trace)
-		avf_input_trace (vm, node, next2, b2, &n_trace, ad, rxve + 2);
-	      if (n_trace)
-		avf_input_trace (vm, node, next3, b3, &n_trace, ad, rxve + 3);
-	    }
+	      tail_next = (tail_next + 1) & mask;
+	      td = fd + tail_next;
 
-	  /* next */
-	  to_next += 4;
-	  n_left_to_next -= 4;
-	  rxve += 4;
-	  n_rxv -= 4;
-
-	  /* enqueue */
-	  vlib_validate_buffer_enqueue_x4 (vm, node, next_index, to_next,
-					   n_left_to_next, bi0, bi1, bi2, bi3,
-					   next0, next1, next2, next3);
+	      /* bail out in case of incomplete transaction */
+	      if (avf_rxd_is_not_dd (td))
+		goto no_more_desc;
+
+	      or_qw1 |= tail->qw1s[tail_desc] = td[0].qword[1];
+	      tail->buffers[tail_desc] = rxq->bufs[tail_next];
+	      tail_desc++;
+	    }
+	  while (avf_rxd_is_not_eop (td));
+	  next = tail_next;
+	  n_tail_desc += tail_desc;
 	}
-      while (n_rxv && n_left_to_next)
-	{
-	  bi0 = rxve[0].bi;
-	  to_next[0] = bi0;
-	  b0 = vlib_get_buffer (vm, bi0);
 
-	  b0->current_length = rxve->length;
-	  n_rx_bytes += b0->current_length;
+      or_qw1 |= ptd->qw1s[n_rx_packets] = d[0].qword[1];
 
-	  if (PREDICT_TRUE (ad->per_interface_next_index == ~0))
-	    {
-	      next0 = avf_find_next (rxve, b0, 1);
-	      if (with_features_or_tracing)
-		vnet_feature_start_device_input_x1 (ad->sw_if_index, &next0,
-						    b0);
-	      avf_check_for_error (node, rxve + 0, b0, &next0);
-	    }
-	  else
-	    next0 = ad->per_interface_next_index;
+      /* next */
+      next = (next + 1) & mask;
+      d = fd + next;
+      n_rx_packets++;
+      bi++;
+    }
+no_more_desc:
 
-	  clib_memcpy (vnet_buffer (b0)->sw_if_index, sw_if_idx,
-		       sizeof (sw_if_idx));
+  if (n_rx_packets == 0)
+    goto done;
 
-	  VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b0);
-	  if (with_features_or_tracing && PREDICT_FALSE (n_trace > 0))
-	    avf_input_trace (vm, node, next0, b0, &n_trace, ad, rxve);
+  rxq->next = next;
+  rxq->n_enqueued -= n_rx_packets + n_tail_desc;
+
+#ifdef CLIB_HAVE_VEC256
+  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;
+  vnet_buffer (bt)->sw_if_index[VLIB_TX] = ~0;
+
+  if (n_tail_desc)
+    n_rx_bytes = avf_process_rx_burst (vm, node, ptd, n_rx_packets, 1);
+  else
+    n_rx_bytes = avf_process_rx_burst (vm, node, ptd, n_rx_packets, 0);
+
+  /* packet trace if enabled */
+  if (PREDICT_FALSE ((n_trace = vlib_get_trace_count (vm, node))))
+    {
+      u32 n_left = n_rx_packets, i = 0, j;
+      bi = to_next;
+
+      while (n_trace && n_left)
+	{
+	  vlib_buffer_t *b;
+	  avf_input_trace_t *tr;
+	  b = vlib_get_buffer (vm, bi[0]);
+	  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->hw_if_index = ad->hw_if_index;
+	  tr->qw1s[0] = ptd->qw1s[i];
+	  for (j = 1; j < AVF_RX_MAX_DESC_IN_CHAIN; j++)
+	    tr->qw1s[j] = ptd->tails[i].qw1s[j - 1];
 
 	  /* next */
-	  to_next += 1;
-	  n_left_to_next -= 1;
-	  rxve += 1;
-	  n_rxv -= 1;
-
-	  /* enqueue */
-	  vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
-					   n_left_to_next, bi0, next0);
+	  n_trace--;
+	  n_left--;
+	  bi++;
+	  i++;
 	}
-      vlib_put_next_frame (vm, node, next_index, n_left_to_next);
+      vlib_set_trace_count (vm, node, n_trace);
+    }
+
+  if (PREDICT_TRUE (next_index == VNET_DEVICE_INPUT_NEXT_ETHERNET_INPUT))
+    {
+      vlib_next_frame_t *nf;
+      vlib_frame_t *f;
+      ethernet_input_frame_t *ef;
+      nf = vlib_node_runtime_get_next_frame (vm, node, next_index);
+      f = vlib_get_frame (vm, nf->frame_index);
+      f->flags = ETH_INPUT_FRAME_F_SINGLE_SW_IF_IDX;
+
+      ef = vlib_frame_scalar_args (f);
+      ef->sw_if_index = ad->sw_if_index;
+      ef->hw_if_index = ad->hw_if_index;
+
+      if ((or_qw1 & AVF_RXD_ERROR_IPE) == 0)
+	f->flags |= ETH_INPUT_FRAME_F_IP4_CKSUM_OK;
     }
 
+  n_left_to_next -= n_rx_packets;
+  vlib_put_next_frame (vm, node, next_index, n_left_to_next);
+
   vlib_increment_combined_counter (vnm->interface_main.combined_sw_if_counters
 				   + VNET_INTERFACE_COUNTER_RX, thr_idx,
 				   ad->hw_if_index, n_rx_packets, n_rx_bytes);
 
+done:
   return n_rx_packets;
 }
 
-uword
-CLIB_MULTIARCH_FN (avf_input) (vlib_main_t * vm, vlib_node_runtime_t * node,
+VLIB_NODE_FN (avf_input_node) (vlib_main_t * vm, vlib_node_runtime_t * node,
 			       vlib_frame_t * frame)
 {
   u32 n_rx = 0;
@@ -390,19 +438,13 @@ CLIB_MULTIARCH_FN (avf_input) (vlib_main_t * vm, vlib_node_runtime_t * node,
     ad = vec_elt_at_index (am->devices, dq->dev_instance);
     if ((ad->flags & AVF_DEVICE_F_ADMIN_UP) == 0)
       continue;
-    if (vnet_device_input_have_features (ad->sw_if_index) ||
-	vlib_get_trace_count (vm, node))
-      n_rx += avf_device_input_inline (vm, node, frame, ad, dq->queue_id, 1);
-    else
-      n_rx += avf_device_input_inline (vm, node, frame, ad, dq->queue_id, 0);
+    n_rx += avf_device_input_inline (vm, node, frame, ad, dq->queue_id);
   }
   return n_rx;
 }
 
-#ifndef CLIB_MULTIARCH_VARIANT
 /* *INDENT-OFF* */
 VLIB_REGISTER_NODE (avf_input_node) = {
-  .function = avf_input,
   .name = "avf-input",
   .sibling_of = "device-input",
   .format_trace = format_avf_input_trace,
@@ -412,21 +454,6 @@ VLIB_REGISTER_NODE (avf_input_node) = {
   .error_strings = avf_input_error_strings,
 };
 
-#if __x86_64__
-vlib_node_function_t __clib_weak avf_input_avx512;
-vlib_node_function_t __clib_weak avf_input_avx2;
-static void __clib_constructor
-avf_input_multiarch_select (void)
-{
-  if (avf_input_avx512 && clib_cpu_supports_avx512f ())
-    avf_input_node.function = avf_input_avx512;
-  else if (avf_input_avx2 && clib_cpu_supports_avx2 ())
-    avf_input_node.function = avf_input_avx2;
-}
-
-#endif
-#endif
-
 /* *INDENT-ON* */