[PATCH v2 7/7] virtio: pick simple rx/tx func
From: Huawei Xie <hidden>
Date: 2015-10-18 06:29:35
Subsystem:
networking drivers, the rest · Maintainers:
Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
simple rx/tx func is enabled when user specifies single segment, no offload support. merge-able should be disabled to use simple rxtx. Signed-off-by: Huawei Xie <redacted> --- drivers/net/virtio/virtio_rxtx.c | 12 ++++++++++++ 1 file changed, 12 insertions(+)
diff --git a/drivers/net/virtio/virtio_rxtx.c b/drivers/net/virtio/virtio_rxtx.c
index 947fc46..71f8cd4 100644
--- a/drivers/net/virtio/virtio_rxtx.c
+++ b/drivers/net/virtio/virtio_rxtx.c@@ -62,6 +62,10 @@ #define VIRTIO_DUMP_PACKET(m, len) do { } while (0) #endif + +#define VIRTIO_SIMPLE_FLAGS ((uint32_t)ETH_TXQ_FLAGS_NOMULTSEGS | \ + ETH_TXQ_FLAGS_NOOFFLOADS) + static int use_simple_rxtx; static void
@@ -471,6 +475,14 @@ virtio_dev_tx_queue_setup(struct rte_eth_dev *dev, return -EINVAL; } + /* Use simple rx/tx func if single segment and no offloads */ + if ((tx_conf->txq_flags & VIRTIO_SIMPLE_FLAGS) == VIRTIO_SIMPLE_FLAGS) { + PMD_INIT_LOG(INFO, "Using simple rx/tx path"); + dev->tx_pkt_burst = virtio_xmit_pkts_simple; + dev->rx_pkt_burst = virtio_recv_pkts_vec; + use_simple_rxtx = 1; + } + ret = virtio_dev_queue_setup(dev, VTNET_TQ, queue_idx, vtpci_queue_idx, nb_desc, socket_id, &vq); if (ret < 0) {
--
1.8.1.4