net/iavf: remove outer UDP checksum offload for X710 VF

According to the X710 datasheet, X710 devices do not support outer
checksum offload.

"""
8.4.4.2 Transmit L3 and L4 Integrity Offload

Tunneling UDP headers and GRE header are not offloaded while the
X710/XXV710/XL710 leaves their checksum field as is.
If a checksum is required, software should provide it as well as the inner
checksum value(s) that are required for the outer checksum.
"""

Fix Tx offload capabilities depending on the VF type.

Bugzilla ID: 1406
Fixes: f7c8c36 ("net/iavf: enable inner and outer Tx checksum offload")
Cc: [email protected]

Signed-off-by: David Marchand <[email protected]>
Tested-by: Ali Alnubani <[email protected]>

doc/guides/nics/features/iavf.ini

@@ -33,7 +33,7 @@ L3 checksum offload  = Y
 L4 checksum offload  = Y
 Timestamp offload    = Y
 Inner L3 checksum    = Y
-Inner L4 checksum    = Y
+Inner L4 checksum    = P
 Packet type parsing  = Y
 Rx descriptor status = Y
 Tx descriptor status = Y

drivers/net/iavf/iavf_ethdev.c

@@ -1163,7 +1163,6 @@ iavf_dev_info_get(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info)
 		RTE_ETH_TX_OFFLOAD_TCP_CKSUM |
 		RTE_ETH_TX_OFFLOAD_SCTP_CKSUM |
 		RTE_ETH_TX_OFFLOAD_OUTER_IPV4_CKSUM |
-		RTE_ETH_TX_OFFLOAD_OUTER_UDP_CKSUM |
 		RTE_ETH_TX_OFFLOAD_TCP_TSO |
 		RTE_ETH_TX_OFFLOAD_VXLAN_TNL_TSO |
 		RTE_ETH_TX_OFFLOAD_GRE_TNL_TSO |
@@ -1172,6 +1171,10 @@ iavf_dev_info_get(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info)
 		RTE_ETH_TX_OFFLOAD_MULTI_SEGS |
 		RTE_ETH_TX_OFFLOAD_MBUF_FAST_FREE;
 
+	/* X710 does not support outer udp checksum */
+	if (adapter->hw.mac.type != IAVF_MAC_XL710)
+		dev_info->tx_offload_capa |= RTE_ETH_TX_OFFLOAD_OUTER_UDP_CKSUM;
+
 	if (vf->vf_res->vf_cap_flags & VIRTCHNL_VF_OFFLOAD_CRC)
 		dev_info->rx_offload_capa |= RTE_ETH_RX_OFFLOAD_KEEP_CRC;