Commit 565cab0a authored by hayeswang's avatar hayeswang Committed by David S. Miller
Browse files

r8152: support rx checksum 



Support hw rx checksum for TCP and UDP packets.

Signed-off-by: default avatarHayes Wang <hayeswang@realtek.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 5e2f7485

drivers/net/usb/r8152.c

+39 −2
Original line number Diff line number Diff line
@@ -467,8 +467,17 @@ enum rtl8152_flags { 
struct rx_desc {

	__le32 opts1;

#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 +1413,32 @@ static int r8152_tx_agg_fill(struct r8152 *tp, struct tx_agg *agg) 
	return ret;

}



static u8 r8152_rx_csum(struct r8152 *tp, struct rx_desc *rx_desc)

{

	u8 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))

			checksum = CHECKSUM_NONE;

		else if ((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);