@@ -97,7 +97,7 @@
*/
#define E1000_ETH_OVERHEAD (RTE_ETHER_HDR_LEN + RTE_ETHER_CRC_LEN + \
VLAN_TAG_SIZE)
-
+#define E1000_ETH_MAX_LEN (RTE_ETHER_MTU + E1000_ETH_OVERHEAD)
/*
* Maximum number of Ring Descriptors.
*
@@ -1799,8 +1799,7 @@ eth_em_mtu_set(struct rte_eth_dev *dev, uint16_t mtu)
if (ret != 0)
return ret;
- frame_size = mtu + RTE_ETHER_HDR_LEN + RTE_ETHER_CRC_LEN +
- VLAN_TAG_SIZE;
+ frame_size = mtu + E1000_ETH_OVERHEAD;
/* check that mtu is within the allowed range */
if (mtu < RTE_ETHER_MIN_MTU || frame_size > dev_info.max_rx_pktlen)
@@ -1816,7 +1815,7 @@ eth_em_mtu_set(struct rte_eth_dev *dev, uint16_t mtu)
rctl = E1000_READ_REG(hw, E1000_RCTL);
/* switch to jumbo mode if needed */
- if (frame_size > RTE_ETHER_MAX_LEN) {
+ if (frame_size > E1000_ETH_MAX_LEN) {
dev->data->dev_conf.rxmode.offloads |=
DEV_RX_OFFLOAD_JUMBO_FRAME;
rctl |= E1000_RCTL_LPE;
@@ -4369,7 +4369,7 @@ eth_igb_mtu_set(struct rte_eth_dev *dev, uint16_t mtu)
rctl = E1000_READ_REG(hw, E1000_RCTL);
/* switch to jumbo mode if needed */
- if (frame_size > RTE_ETHER_MAX_LEN) {
+ if (frame_size > E1000_ETH_MAX_LEN) {
dev->data->dev_conf.rxmode.offloads |=
DEV_RX_OFFLOAD_JUMBO_FRAME;
rctl |= E1000_RCTL_LPE;
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: ef990fb56e55 ("net/e1000: convert to new Rx offloads API") Cc: Jeff Guo <jia.guo@intel.com> Cc: Haiyue Wang <haiyue.wang@intel.com> Acked-by: Jeff Guo <jia.guo@intel.com> Signed-off-by: Steve Yang <stevex.yang@intel.com> --- drivers/net/e1000/e1000_ethdev.h | 2 +- drivers/net/e1000/em_ethdev.c | 5 ++--- drivers/net/e1000/igb_ethdev.c | 2 +- 3 files changed, 4 insertions(+), 5 deletions(-)