net/dpaa2: 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: e16408499412 ("net/dpaa2: configure 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/dpaa2/dpaa2_ethdev.c b/drivers/net/dpaa2/dpaa2_ethdev.c
index ab68633..6f38da3 100644 (file)
--- a/drivers/net/dpaa2/dpaa2_ethdev.c
+++ b/drivers/net/dpaa2/dpaa2_ethdev.c
@@ -1420,7 +1420,7 @@ dpaa2_dev_mtu_set(struct rte_eth_dev *dev, uint16_t mtu)
        if (mtu < RTE_ETHER_MIN_MTU || frame_size > DPAA2_MAX_RX_PKT_LEN)
                return -EINVAL;
 
-       if (frame_size > RTE_ETHER_MAX_LEN)
+       if (frame_size > DPAA2_ETH_MAX_LEN)
                dev->data->dev_conf.rxmode.offloads |=
                                                DEV_RX_OFFLOAD_JUMBO_FRAME;
        else

diff --git a/drivers/net/dpaa2/dpaa2_ethdev.h b/drivers/net/dpaa2/dpaa2_ethdev.h
index 8d82f74..cacb11b 100644 (file)
--- a/drivers/net/dpaa2/dpaa2_ethdev.h
+++ b/drivers/net/dpaa2/dpaa2_ethdev.h
@@ -26,6 +26,10 @@
 
 #define DPAA2_RX_DEFAULT_NBDESC 512
 
+#define DPAA2_ETH_MAX_LEN (RTE_ETHER_MTU + \
+                          RTE_ETHER_HDR_LEN + RTE_ETHER_CRC_LEN + \
+                          VLAN_TAG_SIZE)
+
 /*default tc to be used for ,congestion, distribution etc configuration. */
 #define DPAA2_DEF_TC           0