net/octeontx: fix jumbo frame flag condition for MTU set

The jumbo frame uses the 'RTE_ETHER_MAX_LEN' as boundary condition,
but the Ether overhead is larger than 18 when it supports dual VLAN tags.
That will cause the jumbo flag rx offload is wrong when MTU size is
'RTE_ETHER_MTU'.

This fix will change the boundary condition with 'RTE_ETHER_MTU' and
overhead, that perhaps impacts the cases of the jumbo frame related.

Fixes: 3151e6a687a3 ("net/octeontx: support MTU")
Cc: stable@dpdk.org
Signed-off-by: Steve Yang <stevex.yang@intel.com>
Reviewed-by: Ferruh Yigit <ferruh.yigit@intel.com>
Acked-by: Harman Kalra <hkalra@marvell.com>

diff --git a/drivers/net/octeontx/octeontx_ethdev.c b/drivers/net/octeontx/octeontx_ethdev.c
index 3ee7b04..8177988 100644 (file)
--- a/drivers/net/octeontx/octeontx_ethdev.c
+++ b/drivers/net/octeontx/octeontx_ethdev.c
@@ -552,7 +552,7 @@ octeontx_dev_mtu_set(struct rte_eth_dev *eth_dev, uint16_t mtu)
        if (rc)
                return rc;
 
-       if (frame_size > RTE_ETHER_MAX_LEN)
+       if (frame_size > OCCTX_L2_MAX_LEN)
                nic->rx_offloads |= DEV_RX_OFFLOAD_JUMBO_FRAME;
        else
                nic->rx_offloads &= ~DEV_RX_OFFLOAD_JUMBO_FRAME;

diff --git a/drivers/net/octeontx/octeontx_ethdev.h b/drivers/net/octeontx/octeontx_ethdev.h
index 7246fb6..780a094 100644 (file)
--- a/drivers/net/octeontx/octeontx_ethdev.h
+++ b/drivers/net/octeontx/octeontx_ethdev.h
@@ -44,6 +44,7 @@
 /* ETH_HLEN+ETH_FCS+2*VLAN_HLEN */
 #define OCCTX_L2_OVERHEAD      (RTE_ETHER_HDR_LEN + RTE_ETHER_CRC_LEN + \
                                 OCCTX_MAX_VTAG_ACT_SIZE)
+#define OCCTX_L2_MAX_LEN       (RTE_ETHER_MTU + OCCTX_L2_OVERHEAD)
 
 /* Since HW FRS includes NPC VTAG insertion space, user has reduced FRS */
 #define OCCTX_MAX_FRS  \