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gianfar: Add support for skb recycling 

Signed-off-by: Andy Fleming <afleming@freescale.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Andy Fleming 2009-02-04 16:43:16 -08:00 committed by David S. Miller
parent 1577ecef76
commit 0fd56bb5be
2 changed files with 21 additions and 4 deletions
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23
drivers/net/gianfar.c
View File

@ -1181,6 +1181,8 @@ static int gfar_enet_open(struct net_device *dev)
napi_enable(&priv->napi);
skb_queue_head_init(&priv->rx_recycle);
/* Initialize a bunch of registers */
init_registers(dev);
@ -1399,6 +1401,7 @@ static int gfar_close(struct net_device *dev)
napi_disable(&priv->napi);
skb_queue_purge(&priv->rx_recycle);
cancel_work_sync(&priv->reset_task);
stop_gfar(dev);
@ -1595,7 +1598,17 @@ static int gfar_clean_tx_ring(struct net_device *dev)
bdp = next_txbd(bdp, base, tx_ring_size);
}
dev_kfree_skb_any(skb);
/*
* If there's room in the queue (limit it to rx_buffer_size)
* we add this skb back into the pool, if it's the right size
*/
if (skb_queue_len(&priv->rx_recycle) < priv->rx_ring_size &&
skb_recycle_check(skb, priv->rx_buffer_size +
RXBUF_ALIGNMENT))
__skb_queue_head(&priv->rx_recycle, skb);
else
dev_kfree_skb_any(skb);
priv->tx_skbuff[skb_dirtytx] = NULL;
skb_dirtytx = (skb_dirtytx + 1) &
@ -1668,8 +1681,10 @@ struct sk_buff * gfar_new_skb(struct net_device *dev)
struct gfar_private *priv = netdev_priv(dev);
struct sk_buff *skb = NULL;
/* We have to allocate the skb, so keep trying till we succeed */
skb = netdev_alloc_skb(dev, priv->rx_buffer_size + RXBUF_ALIGNMENT);
skb = __skb_dequeue(&priv->rx_recycle);
if (!skb)
skb = netdev_alloc_skb(dev,
priv->rx_buffer_size + RXBUF_ALIGNMENT);
if (!skb)
return NULL;
@ -1817,7 +1832,7 @@ int gfar_clean_rx_ring(struct net_device *dev, int rx_work_limit)
if (unlikely(!newskb))
newskb = skb;
else if (skb)
dev_kfree_skb_any(skb);
__skb_queue_head(&priv->rx_recycle, skb);
} else {
/* Increment the number of packets */
dev->stats.rx_packets++;

2
drivers/net/gianfar.h
View File

@ -758,6 +758,8 @@ struct gfar_private {
unsigned int rx_stash_size;
unsigned int rx_stash_index;
struct sk_buff_head rx_recycle;
struct vlan_group *vlgrp;
/* Unprotected fields */