From 0fd56bb5be6455d0d42241e65aed057244665e5e Mon Sep 17 00:00:00 2001
From: Andy Fleming <afleming@freescale.com>
Date: Wed, 4 Feb 2009 16:43:16 -0800
Subject: [PATCH] gianfar: Add support for skb recycling
Signed-off-by: Andy Fleming <afleming@freescale.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
drivers/net/gianfar.c | 23 +++++++++++++++++++----
drivers/net/gianfar.h | 2 ++
2 files changed, 21 insertions(+), 4 deletions(-)
diff --git a/drivers/net/gianfar.c b/drivers/net/gianfar.c
index bd21b6d5f13c5..33de25602b32e 100644
--- a/drivers/net/gianfar.c
+++ b/drivers/net/gianfar.c
@@ -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++;
diff --git a/drivers/net/gianfar.h b/drivers/net/gianfar.h
index 3cb901b2e2403..811855bc42312 100644
--- a/drivers/net/gianfar.h
+++ b/drivers/net/gianfar.h
@@ -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 */
--
GitLab