Support hw rx checksum for TCP and UDP packets.
Signed-off-by: Hayes Wang <hayesw...@realtek.com>
---
drivers/net/usb/r8152.c | 41 +++++++++++++++++++++++++++++++++++++++--
1 file changed, 39 insertions(+), 2 deletions(-)
diff --git a/drivers/net/usb/r8152.c b/drivers/net/usb/r8152.c
index 08f4e870..c76e018 100644
--- a/drivers/net/usb/r8152.c
+++ b/drivers/net/usb/r8152.c
@@ -466,9 +466,19 @@ enum rtl8152_flags {
struct rx_desc {
__le32 opts1;
+#define RD_CRC (1 << 15)
#define RX_LEN_MASK 0x7fff
+
__le32 opts2;
+#define RD_UDP_CS (1 << 23)
+#define RD_TCP_CS (1 << 22)
+#define RD_IPV4_CS (1 << 19)
+
__le32 opts3;
+#define IPF (1 << 23) /* IP checksum fail */
+#define UDPF (1 << 22) /* UDP checksum fail */
+#define TCPF (1 << 21) /* TCP checksum fail */
+
__le32 opts4;
__le32 opts5;
__le32 opts6;
@@ -1404,6 +1414,31 @@ out_tx_fill:
return ret;
}
+static int r8152_rx_csum(struct r8152 *tp, struct rx_desc *rx_desc)
+{
+ int checksum = CHECKSUM_NONE;
+ u32 opts2, opts3;
+
+ if (tp->version == RTL_VER_01)
+ goto return_result;
+
+ opts2 = le32_to_cpu(rx_desc->opts2);
+ opts3 = le32_to_cpu(rx_desc->opts3);
+
+ if (opts2 & RD_IPV4_CS) {
+ if (opts3 & IPF)
+ checksum = CHECKSUM_NONE;
+ else if (((opts2 & RD_UDP_CS) && (opts3 & UDPF)) ||
+ ((opts2 & RD_TCP_CS) && (opts3 & TCPF)))
+ checksum = CHECKSUM_NONE;
+ else
+ checksum = CHECKSUM_UNNECESSARY;
+ }
+
+return_result:
+ return checksum;
+}
+
static void rx_bottom(struct r8152 *tp)
{
unsigned long flags;
@@ -1458,6 +1493,8 @@ static void rx_bottom(struct r8152 *tp)
stats->rx_dropped++;
goto find_next_rx;
}
+
+ skb->ip_summed = r8152_rx_csum(tp, rx_desc);
memcpy(skb->data, rx_data, pkt_len);
skb_put(skb, pkt_len);
skb->protocol = eth_type_trans(skb, netdev);
@@ -3103,8 +3140,8 @@ static int rtl8152_probe(struct usb_interface *intf,
netdev->netdev_ops = &rtl8152_netdev_ops;
netdev->watchdog_timeo = RTL8152_TX_TIMEOUT;
- netdev->features |= NETIF_F_IP_CSUM;
- netdev->hw_features = NETIF_F_IP_CSUM;
+ netdev->features |= NETIF_F_RXCSUM | NETIF_F_IP_CSUM;
+ netdev->hw_features = NETIF_F_RXCSUM | NETIF_F_IP_CSUM;
SET_ETHTOOL_OPS(netdev, &ops);
--
1.8.4.2
--
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