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Date: Thu, 16 Sep 2010 22:14:39 -0700
From: Amit Kumar Salecha <amit.salecha@...gic.com>
To: davem@...emloft.net
Cc: netdev@...r.kernel.org, ameen.rahman@...gic.com,
anirban.chakraborty@...gic.com
Subject: [PATCHv2 NEXT 1/5] 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@...gic.com>
---
drivers/net/qlcnic/qlcnic.h | 1 +
drivers/net/qlcnic/qlcnic_init.c | 59 ++++++++++++++++++++++----------------
drivers/net/qlcnic/qlcnic_main.c | 10 ++++++-
3 files changed, 44 insertions(+), 26 deletions(-)
diff --git a/drivers/net/qlcnic/qlcnic.h b/drivers/net/qlcnic/qlcnic.h
index cc8385a..c8caec9 100644
--- a/drivers/net/qlcnic/qlcnic.h
+++ b/drivers/net/qlcnic/qlcnic.h
@@ -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;
diff --git a/drivers/net/qlcnic/qlcnic_init.c b/drivers/net/qlcnic/qlcnic_init.c
index 26a7d6b..10cebb1 100644
--- a/drivers/net/qlcnic/qlcnic_init.c
+++ b/drivers/net/qlcnic/qlcnic_init.c
@@ -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;
diff --git a/drivers/net/qlcnic/qlcnic_main.c b/drivers/net/qlcnic/qlcnic_main.c
index 5fd2abd..9eb0ced 100644
--- a/drivers/net/qlcnic/qlcnic_main.c
+++ b/drivers/net/qlcnic/qlcnic_main.c
@@ -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);
--
1.6.0.2
--
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