virtio: add default Tx configuration

When I tried to launch test-pmd on KVM guest of Fedora21, I got following error:

Configuring Port 0 (socket 0)
Fail to configure port 0 tx queues
EAL: Error - exiting with code: 1
  Cause: Start ports failed

I found that the error caused here, and actual error message was
"TX checksum offload not supported".

This patch adds default_txconf on virtio pmd, to avoid the error.

Signed-off-by: Takuya Asada <syuu@cloudius-systems.com>
Acked-by: Pablo de Lara <pablo.de.lara.guarch@intel.com>

diff --git a/lib/librte_pmd_virtio/virtio_ethdev.c b/lib/librte_pmd_virtio/virtio_ethdev.c
index d239083..c7a0d75 100644 (file)
--- a/lib/librte_pmd_virtio/virtio_ethdev.c
+++ b/lib/librte_pmd_virtio/virtio_ethdev.c
@@ -1471,6 +1471,9 @@ virtio_dev_info_get(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info)
        dev_info->min_rx_bufsize = VIRTIO_MIN_RX_BUFSIZE;
        dev_info->max_rx_pktlen = VIRTIO_MAX_RX_PKTLEN;
        dev_info->max_mac_addrs = VIRTIO_MAX_MAC_ADDRS;
+       dev_info->default_txconf = (struct rte_eth_txconf) {
+               .txq_flags = ETH_TXQ_FLAGS_NOOFFLOADS
+       };
 }
 
 /*