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net/bnxt: fix MTU setting

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The HW can support maximum frame length of 9600 bytes.
And we are currently capping the max frame size to 9500 bytes.

Fixes: daef48efe5 ("net/bnxt: support set MTU")
Cc: stable@dpdk.org

Signed-off-by: Ajit Khaparde <ajit.khaparde@broadcom.com>
This commit is contained in:
Ajit Khaparde 2018-09-28 18:59:54 -07:00 committed by Ferruh Yigit
parent 63d086a52f
commit 80ad678ae7
2 changed files with 4 additions and 8 deletions
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2
drivers/net/bnxt/bnxt.h
View File

@ -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

10
drivers/net/bnxt/bnxt_ethdev.c
View File

@ -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 |=