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Date: Wed, 1 Apr 2009 14:39:46 -0700
From: Stephen Hemminger <shemminger@...tta.com>
To: Herbert Xu <herbert@...dor.apana.org.au>,
David Miller <davem@...emloft.net>
Cc: netdev@...r.kernel.org
Subject: [PATCH 2/2] sky2: add GRO support
Add support for generic receive offload. Also cleanup counters so
that only updated once per interrupt.
Signed-off-by: Stephen Hemminger <shemminger@...tta.com>
----
Note: this is experimental at this point (so please hold for 2.6.31)
--- a/drivers/net/sky2.c 2009-04-01 11:51:55.822315655 -0700
+++ b/drivers/net/sky2.c 2009-04-01 13:13:40.275066435 -0700
@@ -2344,11 +2344,46 @@ static inline void sky2_tx_done(struct n
}
}
+static inline void sky2_skb_rx(const struct sky2_port *sky2,
+ u32 status, struct sk_buff *skb)
+{
+#ifdef SKY2_VLAN_TAG_USED
+ u16 vlan_tag = be16_to_cpu(sky2->rx_tag);
+ if (sky2->vlgrp && (status & GMR_FS_VLAN)) {
+ if (skb->ip_summed == CHECKSUM_NONE)
+ vlan_hwaccel_receive_skb(skb, sky2->vlgrp, vlan_tag);
+ else
+ vlan_gro_receive(&sky2->hw->napi, sky2->vlgrp,
+ vlan_tag, skb);
+ return;
+ }
+#endif
+ if (skb->ip_summed == CHECKSUM_NONE)
+ netif_receive_skb(skb);
+ else
+ napi_gro_receive(&sky2->hw->napi, skb);
+}
+
+static void sky2_rx_done(struct sky2_hw *hw, unsigned port,
+ unsigned packets, unsigned bytes)
+{
+ struct net_device *dev = hw->dev[port];
+
+ if (dev) {
+ dev->stats.rx_packets += packets;
+ dev->stats.rx_bytes += bytes;
+ dev->last_rx = jiffies;
+ sky2_rx_update(netdev_priv(dev), rxqaddr[port]);
+ }
+}
+
+
/* Process status response ring */
static int sky2_status_intr(struct sky2_hw *hw, int to_do, u16 idx)
{
int work_done = 0;
- unsigned rx[2] = { 0, 0 };
+ unsigned int total_bytes[2] = { 0 };
+ unsigned int total_packets[2] = { 0 };
rmb();
do {
@@ -2375,7 +2410,8 @@ static int sky2_status_intr(struct sky2_
le->opcode = 0;
switch (opcode & ~HW_OWNER) {
case OP_RXSTAT:
- ++rx[port];
+ total_packets[port]++;
+ total_bytes[port] += length;
skb = sky2_receive(dev, length, status);
if (unlikely(!skb)) {
dev->stats.rx_dropped++;
@@ -2393,18 +2429,8 @@ static int sky2_status_intr(struct sky2_
}
skb->protocol = eth_type_trans(skb, dev);
- dev->stats.rx_packets++;
- dev->stats.rx_bytes += skb->len;
- dev->last_rx = jiffies;
-#ifdef SKY2_VLAN_TAG_USED
- if (sky2->vlgrp && (status & GMR_FS_VLAN)) {
- vlan_hwaccel_receive_skb(skb,
- sky2->vlgrp,
- be16_to_cpu(sky2->rx_tag));
- } else
-#endif
- netif_receive_skb(skb);
+ sky2_skb_rx(sky2, status, skb);
/* Stop after net poll weight */
if (++work_done >= to_do)
@@ -2474,11 +2500,9 @@ static int sky2_status_intr(struct sky2_
sky2_write32(hw, STAT_CTRL, SC_STAT_CLR_IRQ);
exit_loop:
- if (rx[0])
- sky2_rx_update(netdev_priv(hw->dev[0]), Q_R1);
- if (rx[1])
- sky2_rx_update(netdev_priv(hw->dev[1]), Q_R2);
+ sky2_rx_done(hw, 0, total_packets[0], total_bytes[0]);
+ sky2_rx_done(hw, 1, total_packets[1], total_bytes[1]);
return work_done;
}
@@ -4245,6 +4269,7 @@ static __devinit struct net_device *sky2
sky2->port = port;
dev->features |= NETIF_F_TSO | NETIF_F_IP_CSUM | NETIF_F_SG;
+ dev->features |= NETIF_F_GRO;
if (highmem)
dev->features |= NETIF_F_HIGHDMA;
--
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