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37 #include "virtqueue.h"
38 #include "virtio_logs.h"
39 #include "virtio_pci.h"
42 * Two types of mbuf to be cleaned:
43 * 1) mbuf that has been consumed by backend but not used by virtio.
44 * 2) mbuf that hasn't been consued by backend.
47 virtqueue_detatch_unused(struct virtqueue *vq)
49 struct rte_mbuf *cookie;
53 for (idx = 0; idx < vq->vq_nentries; idx++) {
54 cookie = vq->vq_descx[idx].cookie;
56 vq->vq_descx[idx].cookie = NULL;
63 /* Flush the elements in the used ring. */
65 virtqueue_flush(struct virtqueue *vq)
67 struct vring_used_elem *uep;
68 struct vq_desc_extra *dxp;
69 uint16_t used_idx, desc_idx;
72 nb_used = VIRTQUEUE_NUSED(vq);
74 for (i = 0; i < nb_used; i++) {
75 used_idx = vq->vq_used_cons_idx & (vq->vq_nentries - 1);
76 uep = &vq->vq_ring.used->ring[used_idx];
77 desc_idx = (uint16_t)uep->id;
78 dxp = &vq->vq_descx[desc_idx];
79 if (dxp->cookie != NULL) {
80 rte_pktmbuf_free(dxp->cookie);
83 vq->vq_used_cons_idx++;
84 vq_ring_free_chain(vq, desc_idx);