diff mbox series

[v4,15/22] net/thunderx: fix the jumbo frame flag condition for mtu set

Message ID 20210118070428.36998-16-stevex.yang@intel.com (mailing list archive)
State Accepted, archived
Delegated to: Ferruh Yigit
Headers show
Series fix rx packets dropped issue | expand

Checks

Context Check Description
ci/checkpatch success coding style OK

Commit Message

Steve Yang Jan. 18, 2021, 7:04 a.m. UTC
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: 65d9804edc05 ("net/thunderx: support MTU configuration")

Cc: Jerin Jacob <jerinj@marvell.com>
Cc: Maciej Czekaj <mczekaj@marvell.com>

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(-)
diff mbox series

Patch

diff --git a/drivers/net/thunderx/base/nicvf_hw_defs.h b/drivers/net/thunderx/base/nicvf_hw_defs.h
index b12c8ec50a..adc8ec943d 100644
--- a/drivers/net/thunderx/base/nicvf_hw_defs.h
+++ b/drivers/net/thunderx/base/nicvf_hw_defs.h
@@ -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 */
diff --git a/drivers/net/thunderx/nicvf_ethdev.c b/drivers/net/thunderx/nicvf_ethdev.c
index b6bb05e500..c2e7c334d4 100644
--- a/drivers/net/thunderx/nicvf_ethdev.c
+++ b/drivers/net/thunderx/nicvf_ethdev.c
@@ -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;