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cxgb - fix T2 GSO

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The patch ensures that a GSO skb has enough headroom
to push an encapsulating cpl_tx_pkt_lso header.

Signed-off-by: Divy Le Ray <divy@chelsio.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
This commit is contained in:
Divy Le Ray 2007-11-27 13:30:09 -08:00 committed by Jeff Garzik
parent bd0ceaab86
commit 7832ee034b
3 changed files with 18 additions and 20 deletions
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3
drivers/net/chelsio/cxgb2.c Normal file → Executable file
View File

@ -401,7 +401,8 @@ static char stats_strings[][ETH_GSTRING_LEN] = {
"TxTso",
"RxVlan",
"TxVlan",
"TxNeedHeadroom",
/* Interrupt stats */
"rx drops",
"pure_rsps",

34
drivers/net/chelsio/sge.c Normal file → Executable file
View File

@ -991,6 +991,7 @@ void t1_sge_get_port_stats(const struct sge *sge, int port,
ss->tx_packets += st->tx_packets;
ss->tx_cso += st->tx_cso;
ss->tx_tso += st->tx_tso;
ss->tx_need_hdrroom += st->tx_need_hdrroom;
ss->vlan_xtract += st->vlan_xtract;
ss->vlan_insert += st->vlan_insert;
}
@ -1848,7 +1849,8 @@ int t1_start_xmit(struct sk_buff *skb, struct net_device *dev)
{
struct adapter *adapter = dev->priv;
struct sge *sge = adapter->sge;
struct sge_port_stats *st = per_cpu_ptr(sge->port_stats[dev->if_port], smp_processor_id());
struct sge_port_stats *st = per_cpu_ptr(sge->port_stats[dev->if_port],
smp_processor_id());
struct cpl_tx_pkt *cpl;
struct sk_buff *orig_skb = skb;
int ret;
@ -1856,6 +1858,18 @@ int t1_start_xmit(struct sk_buff *skb, struct net_device *dev)
if (skb->protocol == htons(ETH_P_CPL5))
goto send;
/*
* We are using a non-standard hard_header_len.
* Allocate more header room in the rare cases it is not big enough.
*/
if (unlikely(skb_headroom(skb) < dev->hard_header_len - ETH_HLEN)) {
skb = skb_realloc_headroom(skb, sizeof(struct cpl_tx_pkt_lso));
++st->tx_need_hdrroom;
dev_kfree_skb_any(orig_skb);
if (!skb)
return NETDEV_TX_OK;
}
if (skb_shinfo(skb)->gso_size) {
int eth_type;
struct cpl_tx_pkt_lso *hdr;
@ -1889,24 +1903,6 @@ int t1_start_xmit(struct sk_buff *skb, struct net_device *dev)
return NETDEV_TX_OK;
}
/*
* We are using a non-standard hard_header_len and some kernel
* components, such as pktgen, do not handle it right.
* Complain when this happens but try to fix things up.
*/
if (unlikely(skb_headroom(skb) < dev->hard_header_len - ETH_HLEN)) {
pr_debug("%s: headroom %d header_len %d\n", dev->name,
skb_headroom(skb), dev->hard_header_len);
if (net_ratelimit())
printk(KERN_ERR "%s: inadequate headroom in "
"Tx packet\n", dev->name);
skb = skb_realloc_headroom(skb, sizeof(*cpl));
dev_kfree_skb_any(orig_skb);
if (!skb)
return NETDEV_TX_OK;
}
if (!(adapter->flags & UDP_CSUM_CAPABLE) &&
skb->ip_summed == CHECKSUM_PARTIAL &&
ip_hdr(skb)->protocol == IPPROTO_UDP) {

1
drivers/net/chelsio/sge.h Normal file → Executable file
View File

@ -64,6 +64,7 @@ struct sge_port_stats {
u64 tx_tso; /* # of TSO requests */
u64 vlan_xtract; /* # of VLAN tag extractions */
u64 vlan_insert; /* # of VLAN tag insertions */
u64 tx_need_hdrroom; /* # of TX skbs in need of more header room */
};
struct sk_buff;