net/virtio: add missing backend features negotiation

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

diff --git a/drivers/net/virtio/virtqueue.c b/drivers/net/virtio/virtqueue.c
index 5a8b212..2702e12 100644 (file)
--- a/drivers/net/virtio/virtqueue.c
+++ b/drivers/net/virtio/virtqueue.c
@@ -16,7 +16,7 @@
  * 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;
        struct virtio_hw *hw;
@@ -32,7 +32,8 @@ virtqueue_detatch_unused(struct virtqueue *vq)
        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_rx && type == VTNET_RQ) {
+               if (hw->use_vec_rx && !vtpci_packed_queue(hw) &&
+                   type == VTNET_RQ) {
                        if (start <= end && idx >= start && idx < end)
                                continue;
                        if (start > end && (idx >= start || idx < end))
@@ -54,9 +55,36 @@ virtqueue_detatch_unused(struct virtqueue *vq)
        return NULL;
 }
 
+/* Flush used descs */
+static void
+virtqueue_rxvq_flush_packed(struct virtqueue *vq)
+{
+       struct vq_desc_extra *dxp;
+       uint16_t i;
+
+       struct vring_packed_desc *descs = vq->vq_packed.ring.desc;
+       int cnt = 0;
+
+       i = vq->vq_used_cons_idx;
+       while (desc_is_used(&descs[i], vq) && cnt++ < vq->vq_nentries) {
+               dxp = &vq->vq_descx[descs[i].id];
+               if (dxp->cookie != NULL) {
+                       rte_pktmbuf_free(dxp->cookie);
+                       dxp->cookie = NULL;
+               }
+               vq->vq_free_cnt++;
+               vq->vq_used_cons_idx++;
+               if (vq->vq_used_cons_idx >= vq->vq_nentries) {
+                       vq->vq_used_cons_idx -= vq->vq_nentries;
+                       vq->vq_packed.used_wrap_counter ^= 1;
+               }
+               i = vq->vq_used_cons_idx;
+       }
+}
+
 /* Flush the elements in the used ring. */
-void
-virtqueue_rxvq_flush(struct virtqueue *vq)
+static void
+virtqueue_rxvq_flush_split(struct virtqueue *vq)
 {
        struct virtnet_rx *rxq = &vq->rxq;
        struct virtio_hw *hw = vq->hw;
@@ -65,15 +93,23 @@ virtqueue_rxvq_flush(struct virtqueue *vq)
        uint16_t used_idx, desc_idx;
        uint16_t nb_used, i;
 
-       nb_used = VIRTQUEUE_NUSED(vq);
+       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_rx) {
+               uep = &vq->vq_split.ring.used->ring[used_idx];
+               if (hw->use_vec_rx) {
                        desc_idx = used_idx;
                        rte_pktmbuf_free(vq->sw_ring[desc_idx]);
                        vq->vq_free_cnt++;
+               } else if (hw->use_inorder_rx) {
+                       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_inorder(vq, desc_idx, 1);
                } else {
                        desc_idx = (uint16_t)uep->id;
                        dxp = &vq->vq_descx[desc_idx];
@@ -86,7 +122,7 @@ virtqueue_rxvq_flush(struct virtqueue *vq)
                vq->vq_used_cons_idx++;
        }
 
-       if (hw->use_simple_rx) {
+       if (hw->use_vec_rx) {
                while (vq->vq_free_cnt >= RTE_VIRTIO_VPMD_RX_REARM_THRESH) {
                        virtio_rxq_rearm_vec(rxq);
                        if (virtqueue_kick_prepare(vq))
@@ -94,3 +130,88 @@ virtqueue_rxvq_flush(struct virtqueue *vq)
                }
        }
 }
+
+/* Flush the elements in the used ring. */
+void
+virtqueue_rxvq_flush(struct virtqueue *vq)
+{
+       struct virtio_hw *hw = vq->hw;
+
+       if (vtpci_packed_queue(hw))
+               virtqueue_rxvq_flush_packed(vq);
+       else
+               virtqueue_rxvq_flush_split(vq);
+}
+
+int
+virtqueue_rxvq_reset_packed(struct virtqueue *vq)
+{
+       int size = vq->vq_nentries;
+       struct vq_desc_extra *dxp;
+       struct virtnet_rx *rxvq;
+       uint16_t desc_idx;
+
+       vq->vq_used_cons_idx = 0;
+       vq->vq_desc_head_idx = 0;
+       vq->vq_avail_idx = 0;
+       vq->vq_desc_tail_idx = (uint16_t)(vq->vq_nentries - 1);
+       vq->vq_free_cnt = vq->vq_nentries;
+
+       vq->vq_packed.used_wrap_counter = 1;
+       vq->vq_packed.cached_flags = VRING_PACKED_DESC_F_AVAIL;
+       vq->vq_packed.event_flags_shadow = 0;
+       vq->vq_packed.cached_flags |= VRING_DESC_F_WRITE;
+
+       rxvq = &vq->rxq;
+       memset(rxvq->mz->addr, 0, rxvq->mz->len);
+
+       for (desc_idx = 0; desc_idx < vq->vq_nentries; desc_idx++) {
+               dxp = &vq->vq_descx[desc_idx];
+               if (dxp->cookie != NULL) {
+                       rte_pktmbuf_free(dxp->cookie);
+                       dxp->cookie = NULL;
+               }
+       }
+
+       vring_desc_init_packed(vq, size);
+
+       virtqueue_disable_intr(vq);
+       return 0;
+}
+
+int
+virtqueue_txvq_reset_packed(struct virtqueue *vq)
+{
+       int size = vq->vq_nentries;
+       struct vq_desc_extra *dxp;
+       struct virtnet_tx *txvq;
+       uint16_t desc_idx;
+
+       vq->vq_used_cons_idx = 0;
+       vq->vq_desc_head_idx = 0;
+       vq->vq_avail_idx = 0;
+       vq->vq_desc_tail_idx = (uint16_t)(vq->vq_nentries - 1);
+       vq->vq_free_cnt = vq->vq_nentries;
+
+       vq->vq_packed.used_wrap_counter = 1;
+       vq->vq_packed.cached_flags = VRING_PACKED_DESC_F_AVAIL;
+       vq->vq_packed.event_flags_shadow = 0;
+
+       txvq = &vq->txq;
+       memset(txvq->mz->addr, 0, txvq->mz->len);
+       memset(txvq->virtio_net_hdr_mz->addr, 0,
+               txvq->virtio_net_hdr_mz->len);
+
+       for (desc_idx = 0; desc_idx < vq->vq_nentries; desc_idx++) {
+               dxp = &vq->vq_descx[desc_idx];
+               if (dxp->cookie != NULL) {
+                       rte_pktmbuf_free(dxp->cookie);
+                       dxp->cookie = NULL;
+               }
+       }
+
+       vring_desc_init_packed(vq, size);
+
+       virtqueue_disable_intr(vq);
+       return 0;
+}