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skge: add GRO support 

- napi_gro_flush() is exported from net/core/dev.c, to avoid
  an irq_save/irq_restore in the packet receive path.
- use napi_gro_receive() instead of netif_receive_skb()
- use napi_gro_flush() before calling __napi_complete()
- turn on NETIF_F_GRO by default
- Tested on a Marvell 88E8001 Gigabit NIC

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric Dumazet 2010-08-31 18:25:32 +00:00 committed by David S. Miller
parent aed5029ead
commit 86cac58b71
3 changed files with 6 additions and 3 deletions
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5
drivers/net/skge.c
View File

@ -3178,8 +3178,7 @@ static int skge_poll(struct napi_struct *napi, int to_do)
skb = skge_rx_get(dev, e, control, rd->status, rd->csum2);
if (likely(skb)) {
netif_receive_skb(skb);
napi_gro_receive(napi, skb);
++work_done;
}
}
@ -3192,6 +3191,7 @@ static int skge_poll(struct napi_struct *napi, int to_do)
if (work_done < to_do) {
unsigned long flags;
napi_gro_flush(napi);
spin_lock_irqsave(&hw->hw_lock, flags);
__napi_complete(napi);
hw->intr_mask |= napimask[skge->port];
@ -3849,6 +3849,7 @@ static struct net_device *skge_devinit(struct skge_hw *hw, int port,
dev->features |= NETIF_F_IP_CSUM | NETIF_F_SG;
skge->rx_csum = 1;
}
dev->features |= NETIF_F_GRO;
/* read the mac address */
memcpy_fromio(dev->dev_addr, hw->regs + B2_MAC_1 + port*8, ETH_ALEN);

1
include/linux/netdevice.h
View File

@ -1702,6 +1702,7 @@ extern gro_result_t dev_gro_receive(struct napi_struct *napi,
extern gro_result_t napi_skb_finish(gro_result_t ret, struct sk_buff *skb);
extern gro_result_t napi_gro_receive(struct napi_struct *napi,
struct sk_buff *skb);
extern void napi_gro_flush(struct napi_struct *napi);
extern void napi_reuse_skb(struct napi_struct *napi,
struct sk_buff *skb);
extern struct sk_buff * napi_get_frags(struct napi_struct *napi);

3
net/core/dev.c
View File

@ -3063,7 +3063,7 @@ out:
return netif_receive_skb(skb);
}
static void napi_gro_flush(struct napi_struct *napi)
inline void napi_gro_flush(struct napi_struct *napi)
{
struct sk_buff *skb, *next;
@ -3076,6 +3076,7 @@ static void napi_gro_flush(struct napi_struct *napi)
napi->gro_count = 0;
napi->gro_list = NULL;
}
EXPORT_SYMBOL(napi_gro_flush);
enum gro_result dev_gro_receive(struct napi_struct *napi, struct sk_buff *skb)
{