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From: Huawei Xie <huawei.xie@intel.com>
To: dev@dpdk.org
Date: Sun, 18 Oct 2015 14:29:04 +0800
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Subject: [dpdk-dev] [PATCH v2 7/7] virtio: pick simple rx/tx func
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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 <huawei.xie@intel.com>
---
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