[dpdk-dev] [PATCH] net/virtio: include host features supported in guest

[Gowrishankar Muthukrishnan <gmuthukr@redhat.com>]

Virtio pmd driver can not benefit from tso and csum offload
as they are not included in negotiation check with host. Add
them in virtio dev init and let negotiation decide the fate.

Signed-off-by: Gowrishankar Muthukrishnan <gmuthukr@redhat.com>

--
This patch has been tested with TSO tests in OVS-DPDK:

https://patchwork.ozlabs.org/project/openvswitch/list/?series=176886

## ------------------------------- ##
## openvswitch 2.13.90 test suite. ##
## ------------------------------- ##

OVS-DPDK unit tests

  1: OVS-DPDK - EAL init                             ok
  2: OVS-DPDK - add standard DPDK port               ok
  3: OVS-DPDK - add vhost-user-client port           ok
  4: OVS-DPDK - ping vhost-user ports                ok
  5: OVS-DPDK - ping vhost-user-client ports         ok
  6: OVS-DPDK - validate tso negotiation             ok

## ------------- ##
## Test results. ##
## ------------- ##

All 6 tests were successful.

---
 drivers/net/virtio/virtio_ethdev.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/virtio/virtio_ethdev.c b/drivers/net/virtio/virtio_ethdev.c
index 044eb10..91f6f16 100644
--- a/drivers/net/virtio/virtio_ethdev.c
+++ b/drivers/net/virtio/virtio_ethdev.c
@@ -1914,7 +1914,7 @@ static int virtio_dev_xstats_get_names(struct rte_eth_dev *dev,
 	}
 
 	/* reset device and negotiate default features */
-	ret = virtio_init_device(eth_dev, VIRTIO_PMD_DEFAULT_GUEST_FEATURES);
+	ret = virtio_init_device(eth_dev, VIRTIO_PMD_SUPPORTED_GUEST_FEATURES);
 	if (ret < 0)
 		goto err_virtio_init;
 
@@ -2064,7 +2064,7 @@ static int eth_virtio_pci_remove(struct rte_pci_device *pci_dev)
 	int ret;
 
 	PMD_INIT_LOG(DEBUG, "configure");
-	req_features = VIRTIO_PMD_DEFAULT_GUEST_FEATURES;
+	req_features = VIRTIO_PMD_SUPPORTED_GUEST_FEATURES;
 
 	if (rxmode->mq_mode != ETH_MQ_RX_NONE) {
 		PMD_DRV_LOG(ERR,
-- 
1.8.3.1