[dpdk-dev] [PATCH v3 03/15] net/bnxt: fix MTU setting
Ajit Khaparde
ajit.khaparde at broadcom.com
Sat Sep 29 03:59:54 CEST 2018
The HW can support maximum frame length of 9600 bytes.
And we are currently capping the max frame size to 9500 bytes.
Fixes: daef48efe5e5 ("net/bnxt: support set MTU")
Cc: stable at dpdk.org
Signed-off-by: Ajit Khaparde <ajit.khaparde at broadcom.com>
---
drivers/net/bnxt/bnxt.h | 2 +-
drivers/net/bnxt/bnxt_ethdev.c | 10 +++-------
2 files changed, 4 insertions(+), 8 deletions(-)
diff --git a/drivers/net/bnxt/bnxt.h b/drivers/net/bnxt/bnxt.h
index 8aae0426a..c580ec22b 100644
--- a/drivers/net/bnxt/bnxt.h
+++ b/drivers/net/bnxt/bnxt.h
@@ -20,7 +20,7 @@
#include "bnxt_cpr.h"
-#define BNXT_MAX_MTU 9500
+#define BNXT_MAX_MTU 9574
#define VLAN_TAG_SIZE 4
#define BNXT_VF_RSV_NUM_RSS_CTX 1
#define BNXT_VF_RSV_NUM_L2_CTX 4
diff --git a/drivers/net/bnxt/bnxt_ethdev.c b/drivers/net/bnxt/bnxt_ethdev.c
index 28e2be7e8..8c156e263 100644
--- a/drivers/net/bnxt/bnxt_ethdev.c
+++ b/drivers/net/bnxt/bnxt_ethdev.c
@@ -451,7 +451,7 @@ static void bnxt_dev_info_get_op(struct rte_eth_dev *eth_dev,
/* Fast path specifics */
dev_info->min_rx_bufsize = 1;
dev_info->max_rx_pktlen = BNXT_MAX_MTU + ETHER_HDR_LEN + ETHER_CRC_LEN
- + VLAN_TAG_SIZE;
+ + VLAN_TAG_SIZE * 2;
dev_info->rx_offload_capa = BNXT_DEV_RX_OFFLOAD_SUPPORT;
if (bp->flags & BNXT_FLAG_PTP_SUPPORTED)
@@ -1564,21 +1564,17 @@ static int bnxt_mtu_set_op(struct rte_eth_dev *eth_dev, uint16_t new_mtu)
{
struct bnxt *bp = eth_dev->data->dev_private;
struct rte_eth_dev_info dev_info;
- uint32_t max_dev_mtu;
uint32_t rc = 0;
uint32_t i;
bnxt_dev_info_get_op(eth_dev, &dev_info);
- max_dev_mtu = dev_info.max_rx_pktlen -
- ETHER_HDR_LEN - ETHER_CRC_LEN - VLAN_TAG_SIZE * 2;
- if (new_mtu < ETHER_MIN_MTU || new_mtu > max_dev_mtu) {
+ if (new_mtu < ETHER_MIN_MTU || new_mtu > BNXT_MAX_MTU) {
PMD_DRV_LOG(ERR, "MTU requested must be within (%d, %d)\n",
- ETHER_MIN_MTU, max_dev_mtu);
+ ETHER_MIN_MTU, BNXT_MAX_MTU);
return -EINVAL;
}
-
if (new_mtu > ETHER_MTU) {
bp->flags |= BNXT_FLAG_JUMBO;
bp->eth_dev->data->dev_conf.rxmode.offloads |=
--
2.17.1 (Apple Git-112)
More information about the dev
mailing list