cpmac: convert to napi_struct interface

Convert cpmac to new napi_struct API introduced by
bea3348eef27e6044b6161fd04c3152215f96411 [NET]: Make NAPI polling independent
of struct net_device objects.
Only disable rx interrupts if napi actually has been scheduled.

Signed-off-by: Eugene Konev <ejka@imfi.kspu.ru>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

1 files changed, 37 insertions, 31 deletions

diff --git a/drivers/net/cpmac.c b/drivers/net/cpmac.c
index 0598d4d438f5..486c82b2dab6 100644
--- a/drivers/net/cpmac.c
+++ b/drivers/net/cpmac.c
@@ -205,6 +205,7 @@ struct cpmac_priv {
         struct net_device *dev;
         struct work_struct reset_work;
         struct platform_device *pdev;
+        struct napi_struct napi;
 };
 
 static irqreturn_t cpmac_irq(int, void *);
@@ -356,47 +357,48 @@ static void cpmac_set_multicast_list(struct net_device *dev)
         }
 }
 
-static struct sk_buff *cpmac_rx_one(struct net_device *dev,
-                                    struct cpmac_priv *priv,
+static struct sk_buff *cpmac_rx_one(struct cpmac_priv *priv,
                                     struct cpmac_desc *desc)
 {
         struct sk_buff *skb, *result = NULL;
 
         if (unlikely(netif_msg_hw(priv)))
-                cpmac_dump_desc(dev, desc);
+                cpmac_dump_desc(priv->dev, desc);
         cpmac_write(priv->regs, CPMAC_RX_ACK(0), (u32)desc->mapping);
         if (unlikely(!desc->datalen)) {
                 if (netif_msg_rx_err(priv) && net_ratelimit())
                         printk(KERN_WARNING "%s: rx: spurious interrupt\n",
-                               dev->name);
+                               priv->dev->name);
                 return NULL;
         }
 
-        skb = netdev_alloc_skb(dev, CPMAC_SKB_SIZE);
+        skb = netdev_alloc_skb(priv->dev, CPMAC_SKB_SIZE);
         if (likely(skb)) {
                 skb_reserve(skb, 2);
                 skb_put(desc->skb, desc->datalen);
-                desc->skb->protocol = eth_type_trans(desc->skb, dev);
+                desc->skb->protocol = eth_type_trans(desc->skb, priv->dev);
                 desc->skb->ip_summed = CHECKSUM_NONE;
-                dev->stats.rx_packets++;
-                dev->stats.rx_bytes += desc->datalen;
+                priv->dev->stats.rx_packets++;
+                priv->dev->stats.rx_bytes += desc->datalen;
                 result = desc->skb;
-                dma_unmap_single(&dev->dev, desc->data_mapping, CPMAC_SKB_SIZE,
-                                 DMA_FROM_DEVICE);
+                dma_unmap_single(&priv->dev->dev, desc->data_mapping,
+                                 CPMAC_SKB_SIZE, DMA_FROM_DEVICE);
                 desc->skb = skb;
-                desc->data_mapping = dma_map_single(&dev->dev, skb->data,
+                desc->data_mapping = dma_map_single(&priv->dev->dev, skb->data,
                                                     CPMAC_SKB_SIZE,
                                                     DMA_FROM_DEVICE);
                 desc->hw_data = (u32)desc->data_mapping;
                 if (unlikely(netif_msg_pktdata(priv))) {
-                        printk(KERN_DEBUG "%s: received packet:\n", dev->name);
-                        cpmac_dump_skb(dev, result);
+                        printk(KERN_DEBUG "%s: received packet:\n",
+                               priv->dev->name);
+                        cpmac_dump_skb(priv->dev, result);
                 }
         } else {
                 if (netif_msg_rx_err(priv) && net_ratelimit())
                         printk(KERN_WARNING
-                               "%s: low on skbs, dropping packet\n", dev->name);
-                dev->stats.rx_dropped++;
+                               "%s: low on skbs, dropping packet\n",
+                               priv->dev->name);
+                priv->dev->stats.rx_dropped++;
         }
 
         desc->buflen = CPMAC_SKB_SIZE;
@@ -405,25 +407,25 @@ static struct sk_buff *cpmac_rx_one(struct net_device *dev,
         return result;
 }
 
-static int cpmac_poll(struct net_device *dev, int *budget)
+static int cpmac_poll(struct napi_struct *napi, int budget)
 {
         struct sk_buff *skb;
         struct cpmac_desc *desc;
-        int received = 0, quota = min(dev->quota, *budget);
-        struct cpmac_priv *priv = netdev_priv(dev);
+        int received = 0;
+        struct cpmac_priv *priv = container_of(napi, struct cpmac_priv, napi);
 
         spin_lock(&priv->rx_lock);
         if (unlikely(!priv->rx_head)) {
                 if (netif_msg_rx_err(priv) && net_ratelimit())
                         printk(KERN_WARNING "%s: rx: polling, but no queue\n",
-                               dev->name);
-                netif_rx_complete(dev);
+                               priv->dev->name);
+                netif_rx_complete(priv->dev, napi);
                 return 0;
         }
 
         desc = priv->rx_head;
-        while ((received < quota) && ((desc->dataflags & CPMAC_OWN) == 0)) {
-                skb = cpmac_rx_one(dev, priv, desc);
+        while (((desc->dataflags & CPMAC_OWN) == 0) && (received < budget)) {
+                skb = cpmac_rx_one(priv, desc);
                 if (likely(skb)) {
                         netif_receive_skb(skb);
                         received++;
@@ -433,13 +435,11 @@ static int cpmac_poll(struct net_device *dev, int *budget)
 
         priv->rx_head = desc;
         spin_unlock(&priv->rx_lock);
-        *budget -= received;
-        dev->quota -= received;
         if (unlikely(netif_msg_rx_status(priv)))
-                printk(KERN_DEBUG "%s: poll processed %d packets\n", dev->name,
-                       received);
+                printk(KERN_DEBUG "%s: poll processed %d packets\n",
+                       priv->dev->name, received);
         if (desc->dataflags & CPMAC_OWN) {
-                netif_rx_complete(dev);
+                netif_rx_complete(priv->dev, napi);
                 cpmac_write(priv->regs, CPMAC_RX_PTR(0), (u32)desc->mapping);
                 cpmac_write(priv->regs, CPMAC_RX_INT_ENABLE, 1);
                 return 0;
@@ -649,6 +649,7 @@ static void cpmac_hw_error(struct work_struct *work)
         spin_unlock(&priv->rx_lock);
         cpmac_clear_tx(priv->dev);
         cpmac_hw_start(priv->dev);
+        napi_enable(&priv->napi);
         netif_start_queue(priv->dev);
 }
 
@@ -675,8 +676,10 @@ static irqreturn_t cpmac_irq(int irq, void *dev_id)
 
         if (status & MAC_INT_RX) {
                 queue = (status >> 8) & 7;
-                netif_rx_schedule(dev);
-                cpmac_write(priv->regs, CPMAC_RX_INT_CLEAR, 1 << queue);
+                if (netif_rx_schedule_prep(dev, &priv->napi)) {
+                        cpmac_write(priv->regs, CPMAC_RX_INT_CLEAR, 1 << queue);
+                        __netif_rx_schedule(dev, &priv->napi);
+                }
         }
 
         cpmac_write(priv->regs, CPMAC_MAC_EOI_VECTOR, 0);
@@ -686,6 +689,7 @@ static irqreturn_t cpmac_irq(int irq, void *dev_id)
                         printk(KERN_ERR "%s: hw error, resetting...\n",
                                dev->name);
                 netif_stop_queue(dev);
+                napi_disable(&priv->napi);
                 cpmac_hw_stop(dev);
                 schedule_work(&priv->reset_work);
                 if (unlikely(netif_msg_hw(priv)))
@@ -921,6 +925,7 @@ static int cpmac_open(struct net_device *dev)
         INIT_WORK(&priv->reset_work, cpmac_hw_error);
         cpmac_hw_start(dev);
 
+        napi_enable(&priv->napi);
         priv->phy->state = PHY_CHANGELINK;
         phy_start(priv->phy);
 
@@ -959,6 +964,7 @@ static int cpmac_stop(struct net_device *dev)
         netif_stop_queue(dev);
 
         cancel_work_sync(&priv->reset_work);
+        napi_disable(&priv->napi);
         phy_stop(priv->phy);
         phy_disconnect(priv->phy);
         priv->phy = NULL;
@@ -1048,10 +1054,10 @@ static int __devinit cpmac_probe(struct platform_device *pdev)
         dev->set_multicast_list = cpmac_set_multicast_list;
         dev->tx_timeout         = cpmac_tx_timeout;
         dev->ethtool_ops        = &cpmac_ethtool_ops;
-        dev->poll = cpmac_poll;
-        dev->weight = 64;
         dev->features |= NETIF_F_MULTI_QUEUE;
 
+        netif_napi_add(dev, &priv->napi, cpmac_poll, 64);
+
         spin_lock_init(&priv->lock);
         spin_lock_init(&priv->rx_lock);
         priv->dev = dev;