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net/usb/r8152: enable tx checksum

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Enable tx checksum.

Signed-off-by: Hayes Wang <hayeswang@realtek.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
hayeswang 2013-08-14 20:54:39 +08:00 committed by David S. Miller
parent ebc2ec484d
commit 5bd2388174
1 changed files with 59 additions and 5 deletions
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64
drivers/net/usb/r8152.c
View file

@ -20,6 +20,8 @@
#include <linux/if_vlan.h>
#include <linux/uaccess.h>
#include <linux/list.h>
#include <linux/ip.h>
#include <linux/ipv6.h>
/* Version Information */
#define DRIVER_VERSION "v1.01.0 (2013/08/12)"
@ -314,8 +316,13 @@ struct tx_desc {
u32 opts1;
#define TX_FS (1 << 31) /* First segment of a packet */
#define TX_LS (1 << 30) /* Final segment of a packet */
#define TX_LEN_MASK 0xffff
#define TX_LEN_MASK 0x3ffff
u32 opts2;
#define UDP_CS (1 << 31) /* Calculate UDP/IP checksum */
#define TCP_CS (1 << 30) /* Calculate TCP/IP checksum */
#define IPV4_CS (1 << 29) /* Calculate IPv4 checksum */
#define IPV6_CS (1 << 28) /* Calculate IPv6 checksum */
};
struct rx_agg {
@ -968,6 +975,52 @@ static int alloc_all_mem(struct r8152 *tp)
return -ENOMEM;
}
static void
r8152_tx_csum(struct r8152 *tp, struct tx_desc *desc, struct sk_buff *skb)
{
memset(desc, 0, sizeof(*desc));
desc->opts1 = cpu_to_le32((skb->len & TX_LEN_MASK) | TX_FS | TX_LS);
if (skb->ip_summed == CHECKSUM_PARTIAL) {
__be16 protocol;
u8 ip_protocol;
u32 opts2 = 0;
if (skb->protocol == htons(ETH_P_8021Q))
protocol = vlan_eth_hdr(skb)->h_vlan_encapsulated_proto;
else
protocol = skb->protocol;
switch (protocol) {
case htons(ETH_P_IP):
opts2 |= IPV4_CS;
ip_protocol = ip_hdr(skb)->protocol;
break;
case htons(ETH_P_IPV6):
opts2 |= IPV6_CS;
ip_protocol = ipv6_hdr(skb)->nexthdr;
break;
default:
ip_protocol = IPPROTO_RAW;
break;
}
if (ip_protocol == IPPROTO_TCP) {
opts2 |= TCP_CS;
opts2 |= (skb_transport_offset(skb) & 0x7fff) << 17;
} else if (ip_protocol == IPPROTO_UDP) {
opts2 |= UDP_CS;
} else {
WARN_ON_ONCE(1);
}
desc->opts2 = cpu_to_le32(opts2);
}
}
static void rx_bottom(struct r8152 *tp)
{
struct net_device_stats *stats;
@ -1097,8 +1150,7 @@ static void tx_bottom(struct r8152 *tp)
tx_desc = (struct tx_desc *)tx_data;
tx_data += sizeof(*tx_desc);
tx_desc->opts1 = cpu_to_le32((skb->len & TX_LEN_MASK) | TX_FS |
TX_LS);
r8152_tx_csum(tp, tx_desc, skb);
memcpy(tx_data, skb->data, len);
agg->skb_num++;
agg->skb_len += len;
@ -1256,7 +1308,7 @@ static netdev_tx_t rtl8152_start_xmit(struct sk_buff *skb,
agg->skb_num = agg->skb_len = 0;
len = skb->len;
tx_desc->opts1 = cpu_to_le32((skb->len & TX_LEN_MASK) | TX_FS | TX_LS);
r8152_tx_csum(tp, tx_desc, skb);
memcpy(tx_data, skb->data, len);
dev_kfree_skb_any(skb);
agg->skb_num++;
@ -1977,7 +2029,9 @@ static int rtl8152_probe(struct usb_interface *intf,
tp->netdev = netdev;
netdev->netdev_ops = &rtl8152_netdev_ops;
netdev->watchdog_timeo = RTL8152_TX_TIMEOUT;
netdev->features &= ~NETIF_F_IP_CSUM;
netdev->features |= NETIF_F_IP_CSUM;
netdev->hw_features = NETIF_F_IP_CSUM;
SET_ETHTOOL_OPS(netdev, &ops);
tp->speed = 0;