[dpdk-dev] [PATCH 2/3] net/enic: add missing Tx offload flags

[Hyong Youb Kim <hyonkim@cisco.com>]

The following commit has added a number of existing offload flags such
as PKT_TX_IPV4 and PKT_TX_IPV6 to PKT_TX_OFFLOAD_MASK defined in
rte_mbuf.h. That change breaks the enic driver's Tx prepare handler.

commit ef28cfa73822 ("mbuf: fix Tx offload mask")

The enic driver keeps the supported offload flags in a local variable
(tx_offload_mask), which is strictly a subset of
PKT_TX_OFFLOAD_MASK. This variable is then used to compute the
unsupported flags (tx_offload_notsup_mask), and the Tx prepare handler
(tx_pkt_prepare) uses it to reject packets with unsupported offload
flags.

As is, tx_offload_notsup_mask ends up containing flags like
PKT_TX_IPV4 that are actually supported by the driver, which then
breaks any application that uses checksum offloads and calls the Tx
prepare handler. So add the flags to tx_offload_mask that the driver
supports but were missing in PKT_TX_OFFLOAD_MASK.

Signed-off-by: Hyong Youb Kim <hyonkim@cisco.com>
Reviewed-by: John Daley <johndale@cisco.com>
---
 drivers/net/enic/enic_main.c | 6 ++----
 drivers/net/enic/enic_res.c  | 2 ++
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/net/enic/enic_main.c b/drivers/net/enic/enic_main.c
index b2581322d..e81c3f3b7 100644
--- a/drivers/net/enic/enic_main.c
+++ b/drivers/net/enic/enic_main.c
@@ -1710,11 +1710,9 @@ static int enic_dev_init(struct enic *enic)
 			DEV_TX_OFFLOAD_OUTER_IPV4_CKSUM |
 			DEV_TX_OFFLOAD_GENEVE_TNL_TSO |
 			DEV_TX_OFFLOAD_VXLAN_TNL_TSO;
-		/*
-		 * Do not add PKT_TX_OUTER_{IPV4,IPV6} as they are not
-		 * 'offload' flags (i.e. not part of PKT_TX_OFFLOAD_MASK).
-		 */
 		enic->tx_offload_mask |=
+			PKT_TX_OUTER_IPV6 |
+			PKT_TX_OUTER_IPV4 |
 			PKT_TX_OUTER_IP_CKSUM |
 			PKT_TX_TUNNEL_MASK;
 		enic->overlay_offload = true;
diff --git a/drivers/net/enic/enic_res.c b/drivers/net/enic/enic_res.c
index 28ae823f4..24b2844f3 100644
--- a/drivers/net/enic/enic_res.c
+++ b/drivers/net/enic/enic_res.c
@@ -202,6 +202,8 @@ int enic_get_vnic_config(struct enic *enic)
 		DEV_RX_OFFLOAD_UDP_CKSUM |
 		DEV_RX_OFFLOAD_TCP_CKSUM;
 	enic->tx_offload_mask =
+		PKT_TX_IPV6 |
+		PKT_TX_IPV4 |
 		PKT_TX_VLAN |
 		PKT_TX_IP_CKSUM |
 		PKT_TX_L4_MASK |
-- 
2.16.2