diff options
Diffstat (limited to 'drivers/net/ethernet/intel/igc/igc_main.c')
| -rw-r--r-- | drivers/net/ethernet/intel/igc/igc_main.c | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/drivers/net/ethernet/intel/igc/igc_main.c b/drivers/net/ethernet/intel/igc/igc_main.c index 7d2f479b57cf..a16c657a1506 100644 --- a/drivers/net/ethernet/intel/igc/igc_main.c +++ b/drivers/net/ethernet/intel/igc/igc_main.c @@ -1201,6 +1201,46 @@ static netdev_tx_t igc_xmit_frame(struct sk_buff *skb, return igc_xmit_frame_ring(skb, igc_tx_queue_mapping(adapter, skb)); } +static void igc_rx_checksum(struct igc_ring *ring, + union igc_adv_rx_desc *rx_desc, + struct sk_buff *skb) +{ + skb_checksum_none_assert(skb); + + /* Ignore Checksum bit is set */ + if (igc_test_staterr(rx_desc, IGC_RXD_STAT_IXSM)) + return; + + /* Rx checksum disabled via ethtool */ + if (!(ring->netdev->features & NETIF_F_RXCSUM)) + return; + + /* TCP/UDP checksum error bit is set */ + if (igc_test_staterr(rx_desc, + IGC_RXDEXT_STATERR_TCPE | + IGC_RXDEXT_STATERR_IPE)) { + /* work around errata with sctp packets where the TCPE aka + * L4E bit is set incorrectly on 64 byte (60 byte w/o crc) + * packets (aka let the stack check the crc32c) + */ + if (!(skb->len == 60 && + test_bit(IGC_RING_FLAG_RX_SCTP_CSUM, &ring->flags))) { + u64_stats_update_begin(&ring->rx_syncp); + ring->rx_stats.csum_err++; + u64_stats_update_end(&ring->rx_syncp); + } + /* let the stack verify checksum errors */ + return; + } + /* It must be a TCP or UDP packet with a valid checksum */ + if (igc_test_staterr(rx_desc, IGC_RXD_STAT_TCPCS | + IGC_RXD_STAT_UDPCS)) + skb->ip_summed = CHECKSUM_UNNECESSARY; + + dev_dbg(ring->dev, "cksum success: bits %08X\n", + le32_to_cpu(rx_desc->wb.upper.status_error)); +} + static inline void igc_rx_hash(struct igc_ring *ring, union igc_adv_rx_desc *rx_desc, struct sk_buff *skb) @@ -1227,6 +1267,8 @@ static void igc_process_skb_fields(struct igc_ring *rx_ring, { igc_rx_hash(rx_ring, rx_desc, skb); + igc_rx_checksum(rx_ring, rx_desc, skb); + skb_record_rx_queue(skb, rx_ring->queue_index); skb->protocol = eth_type_trans(skb, rx_ring->netdev); @@ -4391,6 +4433,7 @@ static int igc_probe(struct pci_dev *pdev, goto err_sw_init; /* Add supported features to the features list*/ + netdev->features |= NETIF_F_RXCSUM; netdev->features |= NETIF_F_HW_CSUM; netdev->features |= NETIF_F_SCTP_CRC; |