1 /* SPDX-License-Identifier: BSD-3-Clause
2 * Copyright(c) 2010-2015 Intel Corporation
9 #include "virtio_logs.h"
10 #include "virtio_pci.h"
11 #include "virtio_rxtx_simple.h"
14 * Two types of mbuf to be cleaned:
15 * 1) mbuf that has been consumed by backend but not used by virtio.
16 * 2) mbuf that hasn't been consued by backend.
19 virtqueue_detach_unused(struct virtqueue *vq)
21 struct rte_mbuf *cookie;
30 type = virtio_get_queue_type(hw, vq->vq_queue_index);
31 start = vq->vq_avail_idx & (vq->vq_nentries - 1);
32 end = (vq->vq_avail_idx + vq->vq_free_cnt) & (vq->vq_nentries - 1);
34 for (idx = 0; idx < vq->vq_nentries; idx++) {
35 if (hw->use_simple_rx && type == VTNET_RQ) {
36 if (start <= end && idx >= start && idx < end)
38 if (start > end && (idx >= start || idx < end))
40 cookie = vq->sw_ring[idx];
42 vq->sw_ring[idx] = NULL;
46 cookie = vq->vq_descx[idx].cookie;
48 vq->vq_descx[idx].cookie = NULL;
57 /* Flush the elements in the used ring. */
59 virtqueue_rxvq_flush(struct virtqueue *vq)
61 struct virtnet_rx *rxq = &vq->rxq;
62 struct virtio_hw *hw = vq->hw;
63 struct vring_used_elem *uep;
64 struct vq_desc_extra *dxp;
65 uint16_t used_idx, desc_idx;
68 nb_used = VIRTQUEUE_NUSED(vq);
70 for (i = 0; i < nb_used; i++) {
71 used_idx = vq->vq_used_cons_idx & (vq->vq_nentries - 1);
72 uep = &vq->vq_ring.used->ring[used_idx];
73 if (hw->use_simple_rx) {
75 rte_pktmbuf_free(vq->sw_ring[desc_idx]);
77 } else if (hw->use_inorder_rx) {
78 desc_idx = (uint16_t)uep->id;
79 dxp = &vq->vq_descx[desc_idx];
80 if (dxp->cookie != NULL) {
81 rte_pktmbuf_free(dxp->cookie);
84 vq_ring_free_inorder(vq, desc_idx, 1);
86 desc_idx = (uint16_t)uep->id;
87 dxp = &vq->vq_descx[desc_idx];
88 if (dxp->cookie != NULL) {
89 rte_pktmbuf_free(dxp->cookie);
92 vq_ring_free_chain(vq, desc_idx);
94 vq->vq_used_cons_idx++;
97 if (hw->use_simple_rx) {
98 while (vq->vq_free_cnt >= RTE_VIRTIO_VPMD_RX_REARM_THRESH) {
99 virtio_rxq_rearm_vec(rxq);
100 if (virtqueue_kick_prepare(vq))
101 virtqueue_notify(vq);