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37 #include "virtqueue.h"
38 #include "virtio_logs.h"
39 #include "virtio_pci.h"
40 #include "virtio_rxtx_simple.h"
43 virtqueue_disable_intr(struct virtqueue *vq)
46 * Set VRING_AVAIL_F_NO_INTERRUPT to hint host
47 * not to interrupt when it consumes packets
48 * Note: this is only considered a hint to the host
50 vq->vq_ring.avail->flags |= VRING_AVAIL_F_NO_INTERRUPT;
54 * Two types of mbuf to be cleaned:
55 * 1) mbuf that has been consumed by backend but not used by virtio.
56 * 2) mbuf that hasn't been consued by backend.
59 virtqueue_detach_unused(struct virtqueue *vq)
61 struct rte_mbuf *cookie;
70 type = virtio_get_queue_type(hw, vq->vq_queue_index);
71 start = vq->vq_avail_idx & (vq->vq_nentries - 1);
72 end = (vq->vq_avail_idx + vq->vq_free_cnt) & (vq->vq_nentries - 1);
74 for (idx = 0; idx < vq->vq_nentries; idx++) {
75 if (hw->use_simple_rxtx && type == VTNET_RQ) {
76 if (start <= end && idx >= start && idx < end)
78 if (start > end && (idx >= start || idx < end))
80 cookie = vq->sw_ring[idx];
82 vq->sw_ring[idx] = NULL;
86 cookie = vq->vq_descx[idx].cookie;
88 vq->vq_descx[idx].cookie = NULL;
97 /* Flush the elements in the used ring. */
99 virtqueue_rxvq_flush(struct virtqueue *vq)
101 struct virtnet_rx *rxq = &vq->rxq;
102 struct virtio_hw *hw = vq->hw;
103 struct vring_used_elem *uep;
104 struct vq_desc_extra *dxp;
105 uint16_t used_idx, desc_idx;
108 nb_used = VIRTQUEUE_NUSED(vq);
110 for (i = 0; i < nb_used; i++) {
111 used_idx = vq->vq_used_cons_idx & (vq->vq_nentries - 1);
112 uep = &vq->vq_ring.used->ring[used_idx];
113 if (hw->use_simple_rxtx) {
115 rte_pktmbuf_free(vq->sw_ring[desc_idx]);
118 desc_idx = (uint16_t)uep->id;
119 dxp = &vq->vq_descx[desc_idx];
120 if (dxp->cookie != NULL) {
121 rte_pktmbuf_free(dxp->cookie);
124 vq_ring_free_chain(vq, desc_idx);
126 vq->vq_used_cons_idx++;
129 if (hw->use_simple_rxtx) {
130 while (vq->vq_free_cnt >= RTE_VIRTIO_VPMD_RX_REARM_THRESH) {
131 virtio_rxq_rearm_vec(rxq);
132 if (virtqueue_kick_prepare(vq))
133 virtqueue_notify(vq);