r8152: support rx checksum
Support hw rx checksum for TCP and UDP packets. Signed-off-by: Hayes Wang <hayeswang@realtek.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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5e2f7485d2
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565cab0a69
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@ -467,8 +467,17 @@ enum rtl8152_flags {
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struct rx_desc {
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__le32 opts1;
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#define RX_LEN_MASK 0x7fff
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__le32 opts2;
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#define RD_UDP_CS (1 << 23)
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#define RD_TCP_CS (1 << 22)
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#define RD_IPV4_CS (1 << 19)
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__le32 opts3;
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#define IPF (1 << 23) /* IP checksum fail */
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#define UDPF (1 << 22) /* UDP checksum fail */
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#define TCPF (1 << 21) /* TCP checksum fail */
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__le32 opts4;
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__le32 opts5;
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__le32 opts6;
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@ -1404,6 +1413,32 @@ out_tx_fill:
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return ret;
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}
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static u8 r8152_rx_csum(struct r8152 *tp, struct rx_desc *rx_desc)
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{
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u8 checksum = CHECKSUM_NONE;
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u32 opts2, opts3;
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if (tp->version == RTL_VER_01)
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goto return_result;
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opts2 = le32_to_cpu(rx_desc->opts2);
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opts3 = le32_to_cpu(rx_desc->opts3);
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if (opts2 & RD_IPV4_CS) {
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if (opts3 & IPF)
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checksum = CHECKSUM_NONE;
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else if ((opts2 & RD_UDP_CS) && (opts3 & UDPF))
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checksum = CHECKSUM_NONE;
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else if ((opts2 & RD_TCP_CS) && (opts3 & TCPF))
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checksum = CHECKSUM_NONE;
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else
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checksum = CHECKSUM_UNNECESSARY;
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}
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return_result:
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return checksum;
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}
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static void rx_bottom(struct r8152 *tp)
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{
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unsigned long flags;
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@ -1458,6 +1493,8 @@ static void rx_bottom(struct r8152 *tp)
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stats->rx_dropped++;
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goto find_next_rx;
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}
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skb->ip_summed = r8152_rx_csum(tp, rx_desc);
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memcpy(skb->data, rx_data, pkt_len);
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skb_put(skb, pkt_len);
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skb->protocol = eth_type_trans(skb, netdev);
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@ -3103,8 +3140,8 @@ static int rtl8152_probe(struct usb_interface *intf,
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netdev->netdev_ops = &rtl8152_netdev_ops;
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netdev->watchdog_timeo = RTL8152_TX_TIMEOUT;
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netdev->features |= NETIF_F_IP_CSUM;
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netdev->hw_features = NETIF_F_IP_CSUM;
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netdev->features |= NETIF_F_RXCSUM | NETIF_F_IP_CSUM;
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netdev->hw_features = NETIF_F_RXCSUM | NETIF_F_IP_CSUM;
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SET_ETHTOOL_OPS(netdev, &ops);
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