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cxgb4: set skb->rxhash 

Implement the ->set_flags ethtool method to control NETIF_F_RXHASH and
set skb->rxhash to the HW calculated hash accordingly.

Follow Eric Dumazet's suggestion and use the hash value raw.

Signed-off-by: Dimitris Michailidis <dm@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Dimitris Michailidis 2010-04-27 16:22:42 -07:00 committed by David S. Miller
parent 8cd9b13207
commit 87b6cf51ac
3 changed files with 21 additions and 2 deletions
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15
drivers/net/cxgb4/cxgb4_main.c
View File

@ -1711,6 +1711,18 @@ static int set_tso(struct net_device *dev, u32 value)
return 0;
}
static int set_flags(struct net_device *dev, u32 flags)
{
if (flags & ~ETH_FLAG_RXHASH)
return -EOPNOTSUPP;
if (flags & ETH_FLAG_RXHASH)
dev->features |= NETIF_F_RXHASH;
else
dev->features &= ~NETIF_F_RXHASH;
return 0;
}
static struct ethtool_ops cxgb_ethtool_ops = {
.get_settings = get_settings,
.set_settings = set_settings,
@ -1741,6 +1753,7 @@ static struct ethtool_ops cxgb_ethtool_ops = {
.get_wol = get_wol,
.set_wol = set_wol,
.set_tso = set_tso,
.set_flags = set_flags,
.flash_device = set_flash,
};
@ -3203,7 +3216,7 @@ static int __devinit init_one(struct pci_dev *pdev,
netdev->features |= NETIF_F_SG | NETIF_F_TSO | NETIF_F_TSO6;
netdev->features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
netdev->features |= NETIF_F_GRO | highdma;
netdev->features |= NETIF_F_GRO | NETIF_F_RXHASH | highdma;
netdev->features |= NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX;
netdev->vlan_features = netdev->features & VLAN_FEAT;

7
drivers/net/cxgb4/sge.c
View File

@ -1524,6 +1524,8 @@ static void do_gro(struct sge_eth_rxq *rxq, const struct pkt_gl *gl,
skb->truesize += skb->data_len;
skb->ip_summed = CHECKSUM_UNNECESSARY;
skb_record_rx_queue(skb, rxq->rspq.idx);
if (rxq->rspq.netdev->features & NETIF_F_RXHASH)
skb->rxhash = (__force u32)pkt->rsshdr.hash_val;
if (unlikely(pkt->vlan_ex)) {
struct port_info *pi = netdev_priv(rxq->rspq.netdev);
@ -1565,7 +1567,7 @@ int t4_ethrx_handler(struct sge_rspq *q, const __be64 *rsp,
if (unlikely(*(u8 *)rsp == CPL_TRACE_PKT))
return handle_trace_pkt(q->adap, si);
pkt = (void *)&rsp[1];
pkt = (const struct cpl_rx_pkt *)rsp;
csum_ok = pkt->csum_calc && !pkt->err_vec;
if ((pkt->l2info & htonl(RXF_TCP)) &&
(q->netdev->features & NETIF_F_GRO) && csum_ok && !pkt->ip_frag) {
@ -1583,6 +1585,9 @@ int t4_ethrx_handler(struct sge_rspq *q, const __be64 *rsp,
__skb_pull(skb, RX_PKT_PAD); /* remove ethernet header padding */
skb->protocol = eth_type_trans(skb, q->netdev);
skb_record_rx_queue(skb, q->idx);
if (skb->dev->features & NETIF_F_RXHASH)
skb->rxhash = (__force u32)pkt->rsshdr.hash_val;
pi = netdev_priv(skb->dev);
rxq->stats.pkts++;

1
drivers/net/cxgb4/t4_msg.h
View File

@ -503,6 +503,7 @@ struct cpl_rx_data_ack {
};
struct cpl_rx_pkt {
struct rss_header rsshdr;
u8 opcode;
#if defined(__LITTLE_ENDIAN_BITFIELD)
u8 iff:4;