[dpdk-dev] [PATCH v3 18/21] net/virtio: add support for mergeable buffers with packed virtqueues
Maxime Coquelin
maxime.coquelin at redhat.com
Fri Apr 6 12:05:02 CEST 2018
Maybe better to place this patch right after the non-mrg one.
On 04/05/2018 12:10 PM, Jens Freimann wrote:
> Implement support for receiving merged buffers in virtio when packed virtqueues
> are enabled.
>
> Signed-off-by: Jens Freimann <jfreimann at redhat.com>
> ---
> drivers/net/virtio/virtio_ethdev.c | 10 ++--
> drivers/net/virtio/virtio_rxtx.c | 107 +++++++++++++++++++++++++++++++++----
> drivers/net/virtio/virtqueue.h | 1 +
> 3 files changed, 104 insertions(+), 14 deletions(-)
>
> diff --git a/drivers/net/virtio/virtio_ethdev.c b/drivers/net/virtio/virtio_ethdev.c
> index 7367d9c5d..a3c3376d7 100644
> --- a/drivers/net/virtio/virtio_ethdev.c
> +++ b/drivers/net/virtio/virtio_ethdev.c
> @@ -1322,15 +1322,15 @@ set_rxtx_funcs(struct rte_eth_dev *eth_dev)
> {
> struct virtio_hw *hw = eth_dev->data->dev_private;
>
> - /* workarount for packed vqs which don't support mrg_rxbuf at this point */
> - if (vtpci_packed_queue(hw) && vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF)) {
> - eth_dev->rx_pkt_burst = &virtio_recv_pkts_packed;
> - } else if (hw->use_simple_rx) {
> + if (hw->use_simple_rx) {
> PMD_INIT_LOG(INFO, "virtio: using simple Rx path on port %u",
> eth_dev->data->port_id);
> eth_dev->rx_pkt_burst = virtio_recv_pkts_vec;
> } else if (vtpci_packed_queue(hw)) {
> - eth_dev->rx_pkt_burst = &virtio_recv_pkts_packed;
> + if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF))
> + eth_dev->rx_pkt_burst = &virtio_recv_mergeable_pkts;
> + else
> + eth_dev->rx_pkt_burst = &virtio_recv_pkts_packed;
> } else if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF)) {
> PMD_INIT_LOG(INFO,
> "virtio: using mergeable buffer Rx path on port %u",
> diff --git a/drivers/net/virtio/virtio_rxtx.c b/drivers/net/virtio/virtio_rxtx.c
> index 9220ae661..a48ca6aaa 100644
> --- a/drivers/net/virtio/virtio_rxtx.c
> +++ b/drivers/net/virtio/virtio_rxtx.c
> @@ -155,8 +155,8 @@ vq_ring_free_chain(struct virtqueue *vq, uint16_t desc_idx)
> vq->vq_free_cnt = (uint16_t)(vq->vq_free_cnt + dxp->ndescs);
> if ((dp->flags & VRING_DESC_F_INDIRECT) == 0) {
> while (dp->flags & VRING_DESC_F_NEXT) {
> - desc_idx_last = dp->next;
> - dp = &vq->vq_ring.desc[dp->next];
> + desc_idx_last = desc_idx++;
> + dp = &vq->vq_ring.desc[desc_idx];
Are you sure this change is in the right patch?
> }
> }
> dxp->ndescs = 0;
> @@ -177,6 +177,76 @@ vq_ring_free_chain(struct virtqueue *vq, uint16_t desc_idx)
> dp->next = VQ_RING_DESC_CHAIN_END;
> }
>
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