[v2,15/22] net/thunderx: fix the jumbo frame flag condition for mtu set
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Commit Message
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.
Fixes: 65d9804edc05 ("net/thunderx: support MTU configuration")
Signed-off-by: Steve Yang <stevex.yang@intel.com>
---
drivers/net/thunderx/base/nicvf_hw_defs.h | 1 +
drivers/net/thunderx/nicvf_ethdev.c | 2 +-
2 files changed, 2 insertions(+), 1 deletion(-)
@@ -176,6 +176,7 @@
#define NIC_HW_MAX_MTU (9190)
#define NIC_HW_MAX_FRS (NIC_HW_MAX_MTU + NIC_HW_L2_OVERHEAD)
#define NIC_HW_MAX_SEGS (12)
+#define NIC_HW_L2_MAX_LEN (RTE_ETHER_MTU + NIC_HW_L2_OVERHEAD)
/* Descriptor alignments */
#define NICVF_RBDR_BASE_ALIGN_BYTES (128) /* 7 bits */
@@ -176,7 +176,7 @@ nicvf_dev_set_mtu(struct rte_eth_dev *dev, uint16_t mtu)
(frame_size + 2 * VLAN_TAG_SIZE > buffsz * NIC_HW_MAX_SEGS))
return -EINVAL;
- if (frame_size > RTE_ETHER_MAX_LEN)
+ if (frame_size > NIC_HW_L2_MAX_LEN)
rxmode->offloads |= DEV_RX_OFFLOAD_JUMBO_FRAME;
else
rxmode->offloads &= ~DEV_RX_OFFLOAD_JUMBO_FRAME;