openwrt-xburst/target/linux/adm5120/patches-2.6.24/900-adm5120_switch_napi.patch

Index: linux-2.6.24/drivers/net/adm5120sw.c
===================================================================
--- linux-2.6.24.orig/drivers/net/adm5120sw.c
+++ linux-2.6.24/drivers/net/adm5120sw.c
@@ -93,8 +93,14 @@
 /* ------------------------------------------------------------------------ */
 
 struct adm5120_if_priv {
+	struct net_device *dev;
+
 	unsigned int	vlan_no;
 	unsigned int	port_mask;
+
+#ifdef CONFIG_ADM5120_SWITCH_NAPI
+	struct napi_struct napi;
+#endif
 };
 
 struct dma_desc {
@@ -333,7 +339,6 @@ static void sw_dump_regs(void)
 	SW_DBG("rlda: %08X\n", t);
 }
 
-
 /* ------------------------------------------------------------------------ */
 
 static inline void adm5120_rx_dma_update(struct dma_desc *desc,
@@ -495,9 +500,11 @@ static void adm5120_switch_tx(void)
 }
 
 #ifdef CONFIG_ADM5120_SWITCH_NAPI
-static int adm5120_if_poll(struct net_device *dev, int *budget)
+static int adm5120_if_poll(struct napi_struct *napi, int limit)
 {
-	int limit = min(dev->quota, *budget);
+	struct adm5120_if_priv *priv = container_of(napi,
+				struct adm5120_if_priv, napi);
+	struct net_device *dev = priv->dev;
 	int done;
 	u32 status;
 
@@ -509,13 +516,10 @@ static int adm5120_if_poll(struct net_de
 	SW_DBG("%s: processing RX ring\n", dev->name);
 	done = adm5120_switch_rx(limit);
 
-	*budget -= done;
-	dev->quota -= done;
-
 	status = sw_int_status() & SWITCH_INTS_POLL;
 	if ((done < limit) && (!status)) {
 		SW_DBG("disable polling mode for %s\n", dev->name);
-		netif_rx_complete(dev);
+		netif_rx_complete(dev, napi);
 		sw_int_unmask(SWITCH_INTS_POLL);
 		return 0;
 	}
@@ -541,10 +545,12 @@ static irqreturn_t adm5120_switch_irq(in
 
 	if (status & SWITCH_INTS_POLL) {
 		struct net_device *dev = dev_id;
+		struct adm5120_if_priv *priv = netdev_priv(dev);
+
 		sw_dump_intr_mask("poll ints", status);
 		SW_DBG("enable polling mode for %s\n", dev->name);
 		sw_int_mask(SWITCH_INTS_POLL);
-		netif_rx_schedule(dev);
+		netif_rx_schedule(dev, &priv->napi);
 	}
 #else
 	sw_int_ack(status);
@@ -779,12 +785,31 @@ static void adm5120_switch_set_vlan_port
 
 /* ------------------------------------------------------------------------ */
 
+#ifdef CONFIG_ADM5120_SWITCH_NAPI
+static inline void adm5120_if_napi_enable(struct net_device *dev)
+{
+	struct adm5120_if_priv *priv = netdev_priv(dev);
+	napi_enable(&priv->napi);
+}
+
+static inline void adm5120_if_napi_disable(struct net_device *dev)
+{
+	struct adm5120_if_priv *priv = netdev_priv(dev);
+	napi_disable(&priv->napi);
+}
+#else
+static inline void adm5120_if_napi_enable(struct net_device *dev) {}
+static inline void adm5120_if_napi_disable(struct net_device *dev) {}
+#endif /* CONFIG_ADM5120_SWITCH_NAPI */
+
 static int adm5120_if_open(struct net_device *dev)
 {
 	u32 t;
 	int err;
 	int i;
 
+	adm5120_if_napi_enable(dev);
+
 	err = request_irq(dev->irq, adm5120_switch_irq,
 		(IRQF_SHARED | IRQF_DISABLED), dev->name, dev);
 	if (err) {
@@ -809,6 +834,7 @@ static int adm5120_if_open(struct net_de
 	return 0;
 
 err:
+	adm5120_if_napi_disable(dev);
 	return err;
 }
 
@@ -818,6 +844,7 @@ static int adm5120_if_stop(struct net_de
 	int i;
 
 	netif_stop_queue(dev);
+	adm5120_if_napi_disable(dev);
 
 	/* disable port if not assigned to other devices */
 	t = sw_read_reg(SWITCH_REG_PORT_CONF0);
@@ -1001,6 +1028,9 @@ static struct net_device *adm5120_if_all
 	if (!dev)
 		return NULL;
 
+	priv = netdev_priv(dev);
+	priv->dev = dev;
+
 	dev->irq		= ADM5120_IRQ_SWITCH;
 	dev->open		= adm5120_if_open;
 	dev->hard_start_xmit 	= adm5120_if_hard_start_xmit;
@@ -1010,13 +1040,11 @@ static struct net_device *adm5120_if_all
 	dev->tx_timeout		= adm5120_if_tx_timeout;
 	dev->watchdog_timeo 	= TX_TIMEOUT;
 	dev->set_mac_address 	= adm5120_if_set_mac_address;
+
 #ifdef CONFIG_ADM5120_SWITCH_NAPI
-	dev->poll		= adm5120_if_poll;
-	dev->weight		= 64;
+	netif_napi_add(dev, &priv->napi, adm5120_if_poll, 64);
 #endif
 
-	SET_MODULE_OWNER(dev);
-
 	return dev;
 }