New upstream version 16.11.5

[deb_dpdk.git] / drivers / net / virtio / virtqueue.c

diff --git a/drivers/net/virtio/virtqueue.c b/drivers/net/virtio/virtqueue.c
index 7f60e3e..0e9e03c 100644 (file)
--- a/drivers/net/virtio/virtqueue.c
+++ b/drivers/net/virtio/virtqueue.c
@@ -37,6 +37,7 @@
 #include "virtqueue.h"
 #include "virtio_logs.h"
 #include "virtio_pci.h"
+#include "virtio_rxtx_simple.h"
 
 void
 virtqueue_disable_intr(struct virtqueue *vq)
@@ -55,18 +56,81 @@ virtqueue_disable_intr(struct virtqueue *vq)
  * 2) mbuf that hasn't been consued by backend.
  */
 struct rte_mbuf *
-virtqueue_detatch_unused(struct virtqueue *vq)
+virtqueue_detach_unused(struct virtqueue *vq)
 {
        struct rte_mbuf *cookie;
-       int idx;
+       struct virtio_hw *hw;
+       uint16_t start, end;
+       int type, idx;
 
-       if (vq != NULL)
-               for (idx = 0; idx < vq->vq_nentries; idx++) {
+       if (vq == NULL)
+               return NULL;
+
+       hw = vq->hw;
+       type = virtio_get_queue_type(hw, vq->vq_queue_index);
+       start = vq->vq_avail_idx & (vq->vq_nentries - 1);
+       end = (vq->vq_avail_idx + vq->vq_free_cnt) & (vq->vq_nentries - 1);
+
+       for (idx = 0; idx < vq->vq_nentries; idx++) {
+               if (hw->use_simple_rxtx && type == VTNET_RQ) {
+                       if (start <= end && idx >= start && idx < end)
+                               continue;
+                       if (start > end && (idx >= start || idx < end))
+                               continue;
+                       cookie = vq->sw_ring[idx];
+                       if (cookie != NULL) {
+                               vq->sw_ring[idx] = NULL;
+                               return cookie;
+                       }
+               } else {
                        cookie = vq->vq_descx[idx].cookie;
                        if (cookie != NULL) {
                                vq->vq_descx[idx].cookie = NULL;
                                return cookie;
                        }
                }
+       }
+
        return NULL;
 }
+
+/* Flush the elements in the used ring. */
+void
+virtqueue_rxvq_flush(struct virtqueue *vq)
+{
+       struct virtnet_rx *rxq = &vq->rxq;
+       struct virtio_hw *hw = vq->hw;
+       struct vring_used_elem *uep;
+       struct vq_desc_extra *dxp;
+       uint16_t used_idx, desc_idx;
+       uint16_t nb_used, i;
+
+       nb_used = VIRTQUEUE_NUSED(vq);
+
+       for (i = 0; i < nb_used; i++) {
+               used_idx = vq->vq_used_cons_idx & (vq->vq_nentries - 1);
+               uep = &vq->vq_ring.used->ring[used_idx];
+               if (hw->use_simple_rxtx) {
+                       desc_idx = used_idx;
+                       rte_pktmbuf_free(vq->sw_ring[desc_idx]);
+                       vq->vq_free_cnt++;
+               } else {
+                       desc_idx = (uint16_t)uep->id;
+                       dxp = &vq->vq_descx[desc_idx];
+                       if (dxp->cookie != NULL) {
+                               rte_pktmbuf_free(dxp->cookie);
+                               dxp->cookie = NULL;
+                       }
+                       vq_ring_free_chain(vq, desc_idx);
+               }
+               vq->vq_used_cons_idx++;
+       }
+
+       if (hw->use_simple_rxtx) {
+               while (vq->vq_free_cnt >= RTE_VIRTIO_VPMD_RX_REARM_THRESH) {
+                       virtio_rxq_rearm_vec(rxq);
+                       if (virtqueue_kick_prepare(vq))
+                               virtqueue_notify(vq);
+               }
+       }
+}