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bng_en: Add ndo_features_check support

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Implement ndo_features_check to validate hardware constraints per-packet:
- Disable SG if nr_frags exceeds hardware limit.
- Disable GSO if packet/fragment length exceeds supported maximum.

Signed-off-by: Bhargava Marreddy <bhargava.marreddy@broadcom.com>
Reviewed-by: Vikas Gupta <vikas.gupta@broadcom.com>
Reviewed-by: Ajit Kumar Khaparde <ajit.khaparde@broadcom.com>
Reviewed-by: Rahul Gupta <rahul-rg.gupta@broadcom.com>
Link: https://patch.msgid.link/20260128185623.26559-6-bhargava.marreddy@broadcom.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Bhargava Marreddy
2026-01-29 00:26:20 +05:30
committed by Jakub Kicinski
parent bd5ad9c052
commit 5deaeae186
3 changed files with 28 additions and 0 deletions
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1
drivers/net/ethernet/broadcom/bnge/bnge_netdev.c
View File

@@ -2421,6 +2421,7 @@ static const struct net_device_ops bnge_netdev_ops = {
.ndo_open = bnge_open,
.ndo_stop = bnge_close,
.ndo_start_xmit = bnge_start_xmit,
.ndo_features_check = bnge_features_check,
};
static void bnge_init_mac_addr(struct bnge_dev *bd)

24
drivers/net/ethernet/broadcom/bnge/bnge_txrx.c
View File

@@ -966,3 +966,27 @@ netdev_tx_t bnge_start_xmit(struct sk_buff *skb, struct net_device *dev)
dev_core_stats_tx_dropped_inc(dev);
return NETDEV_TX_OK;
}
netdev_features_t bnge_features_check(struct sk_buff *skb,
struct net_device *dev,
netdev_features_t features)
{
u32 len;
features = vlan_features_check(skb, features);
#if (MAX_SKB_FRAGS > TX_MAX_FRAGS)
if (skb_shinfo(skb)->nr_frags > TX_MAX_FRAGS)
features &= ~NETIF_F_SG;
#endif
if (skb_is_gso(skb))
len = bnge_get_gso_hdr_len(skb) + skb_shinfo(skb)->gso_size;
else
len = skb->len;
len >>= 9;
if (unlikely(len >= ARRAY_SIZE(bnge_lhint_arr)))
features &= ~(NETIF_F_CSUM_MASK | NETIF_F_GSO_MASK);
return features;
}

3
drivers/net/ethernet/broadcom/bnge/bnge_txrx.h
View File

@@ -119,4 +119,7 @@ irqreturn_t bnge_msix(int irq, void *dev_instance);
netdev_tx_t bnge_start_xmit(struct sk_buff *skb, struct net_device *dev);
void bnge_reuse_rx_data(struct bnge_rx_ring_info *rxr, u16 cons, void *data);
int bnge_napi_poll(struct napi_struct *napi, int budget);
netdev_features_t bnge_features_check(struct sk_buff *skb,
struct net_device *dev,
netdev_features_t features);
#endif /* _BNGE_TXRX_H_ */