qlcnic: support vlan rx accleration

Implemented vlan rx accleration in driver.
This helps in increasing significant performance and
reduces cpu utilization with GRO and LRO.

Eric Dumazet:
	"Its a bit strange you use dev_kfree_skb_any(skb) here."
	"We run in NAPI mode, so you can use dev_kfree_skb()."
Amit:
	Done. Using dev_kfree_skb();

Signed-off-by: Amit Kumar Salecha <amit.salecha@qlogic.com>
Acked-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Amit Kumar Salecha 2010-09-16 19:14:39 +00:00 коммит произвёл David S. Miller
Родитель 0c796f91a5
Коммит d57906633e
3 изменённых файлов: 44 добавлений и 26 удалений

Просмотреть файл

@ -1013,6 +1013,7 @@ struct qlcnic_adapter {
u64 dev_rst_time;
struct vlan_group *vlgrp;
struct qlcnic_npar_info *npars;
struct qlcnic_eswitch *eswitch;
struct qlcnic_nic_template *nic_ops;

Просмотреть файл

@ -1380,24 +1380,28 @@ static struct sk_buff *qlcnic_process_rxbuf(struct qlcnic_adapter *adapter,
}
static int
qlcnic_check_rx_tagging(struct qlcnic_adapter *adapter, struct sk_buff *skb)
qlcnic_check_rx_tagging(struct qlcnic_adapter *adapter, struct sk_buff *skb,
u16 *vlan_tag)
{
u16 vlan_tag;
struct ethhdr *eth_hdr;
if (!__vlan_get_tag(skb, &vlan_tag)) {
if (vlan_tag == adapter->pvid) {
/* strip the tag from the packet and send it up */
eth_hdr = (struct ethhdr *) skb->data;
memmove(skb->data + VLAN_HLEN, eth_hdr, ETH_ALEN * 2);
skb_pull(skb, VLAN_HLEN);
return 0;
}
if (!__vlan_get_tag(skb, vlan_tag)) {
eth_hdr = (struct ethhdr *) skb->data;
memmove(skb->data + VLAN_HLEN, eth_hdr, ETH_ALEN * 2);
skb_pull(skb, VLAN_HLEN);
}
if (!adapter->pvid)
return 0;
if (*vlan_tag == adapter->pvid) {
/* Outer vlan tag. Packet should follow non-vlan path */
*vlan_tag = 0xffff;
return 0;
}
if (adapter->flags & QLCNIC_TAGGING_ENABLED)
return 0;
return -EIO;
return -EINVAL;
}
static struct qlcnic_rx_buffer *
@ -1411,6 +1415,7 @@ qlcnic_process_rcv(struct qlcnic_adapter *adapter,
struct sk_buff *skb;
struct qlcnic_host_rds_ring *rds_ring;
int index, length, cksum, pkt_offset;
u16 vid = 0xffff;
if (unlikely(ring >= adapter->max_rds_rings))
return NULL;
@ -1441,17 +1446,18 @@ qlcnic_process_rcv(struct qlcnic_adapter *adapter,
skb->truesize = skb->len + sizeof(struct sk_buff);
if (unlikely(adapter->pvid)) {
if (qlcnic_check_rx_tagging(adapter, skb)) {
adapter->stats.rxdropped++;
dev_kfree_skb_any(skb);
return buffer;
}
if (unlikely(qlcnic_check_rx_tagging(adapter, skb, &vid))) {
adapter->stats.rxdropped++;
dev_kfree_skb(skb);
return buffer;
}
skb->protocol = eth_type_trans(skb, netdev);
napi_gro_receive(&sds_ring->napi, skb);
if ((vid != 0xffff) && adapter->vlgrp)
vlan_hwaccel_receive_skb(skb, adapter->vlgrp, vid);
else
napi_gro_receive(&sds_ring->napi, skb);
adapter->stats.rx_pkts++;
adapter->stats.rxbytes += length;
@ -1480,6 +1486,7 @@ qlcnic_process_lro(struct qlcnic_adapter *adapter,
int index;
u16 lro_length, length, data_offset;
u32 seq_number;
u16 vid = 0xffff;
if (unlikely(ring > adapter->max_rds_rings))
return NULL;
@ -1514,13 +1521,12 @@ qlcnic_process_lro(struct qlcnic_adapter *adapter,
skb_pull(skb, l2_hdr_offset);
if (unlikely(adapter->pvid)) {
if (qlcnic_check_rx_tagging(adapter, skb)) {
adapter->stats.rxdropped++;
dev_kfree_skb_any(skb);
return buffer;
}
if (unlikely(qlcnic_check_rx_tagging(adapter, skb, &vid))) {
adapter->stats.rxdropped++;
dev_kfree_skb(skb);
return buffer;
}
skb->protocol = eth_type_trans(skb, netdev);
iph = (struct iphdr *)skb->data;
@ -1535,7 +1541,10 @@ qlcnic_process_lro(struct qlcnic_adapter *adapter,
length = skb->len;
netif_receive_skb(skb);
if ((vid != 0xffff) && adapter->vlgrp)
vlan_hwaccel_receive_skb(skb, adapter->vlgrp, vid);
else
netif_receive_skb(skb);
adapter->stats.lro_pkts++;
adapter->stats.lrobytes += length;

Просмотреть файл

@ -371,6 +371,13 @@ static int qlcnic_set_mac(struct net_device *netdev, void *p)
return 0;
}
static void qlcnic_vlan_rx_register(struct net_device *netdev,
struct vlan_group *grp)
{
struct qlcnic_adapter *adapter = netdev_priv(netdev);
adapter->vlgrp = grp;
}
static const struct net_device_ops qlcnic_netdev_ops = {
.ndo_open = qlcnic_open,
.ndo_stop = qlcnic_close,
@ -381,6 +388,7 @@ static const struct net_device_ops qlcnic_netdev_ops = {
.ndo_set_mac_address = qlcnic_set_mac,
.ndo_change_mtu = qlcnic_change_mtu,
.ndo_tx_timeout = qlcnic_tx_timeout,
.ndo_vlan_rx_register = qlcnic_vlan_rx_register,
#ifdef CONFIG_NET_POLL_CONTROLLER
.ndo_poll_controller = qlcnic_poll_controller,
#endif
@ -1446,7 +1454,7 @@ qlcnic_setup_netdev(struct qlcnic_adapter *adapter,
SET_ETHTOOL_OPS(netdev, &qlcnic_ethtool_ops);
netdev->features |= (NETIF_F_SG | NETIF_F_IP_CSUM |
NETIF_F_IPV6_CSUM | NETIF_F_GRO);
NETIF_F_IPV6_CSUM | NETIF_F_GRO | NETIF_F_HW_VLAN_RX);
netdev->vlan_features |= (NETIF_F_SG | NETIF_F_IP_CSUM |
NETIF_F_IPV6_CSUM);