net/dpaa: 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 VLAN tag.
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: 25f854197abc ("net/dpaa: support jumbo frames")
Cc: stable@dpdk.org
Signed-off-by: Steve Yang <stevex.yang@intel.com>
Acked-by: Hemant Agrawal <hemant.agrawal@nxp.com>

diff --git a/drivers/net/dpaa/dpaa_ethdev.c b/drivers/net/dpaa/dpaa_ethdev.c
index f00279e..0c87c13 100644 (file)
--- a/drivers/net/dpaa/dpaa_ethdev.c
+++ b/drivers/net/dpaa/dpaa_ethdev.c
@@ -184,7 +184,7 @@ dpaa_mtu_set(struct rte_eth_dev *dev, uint16_t mtu)
                return -EINVAL;
        }
 
-       if (frame_size > RTE_ETHER_MAX_LEN)
+       if (frame_size > DPAA_ETH_MAX_LEN)
                dev->data->dev_conf.rxmode.offloads |=
                                                DEV_RX_OFFLOAD_JUMBO_FRAME;
        else

diff --git a/drivers/net/dpaa/dpaa_ethdev.h b/drivers/net/dpaa/dpaa_ethdev.h
index 659bceb..a858b13 100644 (file)
--- a/drivers/net/dpaa/dpaa_ethdev.h
+++ b/drivers/net/dpaa/dpaa_ethdev.h
@@ -51,6 +51,10 @@
 #define VLAN_TAG_SIZE   4 /** < Vlan Header Length */
 #endif
 
+#define DPAA_ETH_MAX_LEN (RTE_ETHER_MTU + \
+                         RTE_ETHER_HDR_LEN + RTE_ETHER_CRC_LEN + \
+                         VLAN_TAG_SIZE)
+
 /* PCD frame queues */
 #define DPAA_DEFAULT_NUM_PCD_QUEUES    1
 #define DPAA_VSP_PROFILE_MAX_NUM       8