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Date: Wed, 3 Sep 2008 14:29:33 +0200
From: Lennert Buytenhek <buytenh@...tstofly.org>
To: netdev@...r.kernel.org
Cc: Dale Farnsworth <dale@...nsworth.org>
Subject: [PATCH 06/17] mv643xx_eth: make napi unconditional
Make napi unconditional on the receive side, so that we can get rid
of all the locking and local interrupt disabling in the receive path.
Signed-off-by: Lennert Buytenhek <buytenh@...vell.com>
---
drivers/net/mv643xx_eth.c | 31 +++----------------------------
1 files changed, 3 insertions(+), 28 deletions(-)
diff --git a/drivers/net/mv643xx_eth.c b/drivers/net/mv643xx_eth.c
index b41860d..2b7e76d 100644
--- a/drivers/net/mv643xx_eth.c
+++ b/drivers/net/mv643xx_eth.c
@@ -58,7 +58,6 @@ static char mv643xx_eth_driver_name[] = "mv643xx_eth";
static char mv643xx_eth_driver_version[] = "1.3";
#define MV643XX_ETH_CHECKSUM_OFFLOAD_TX
-#define MV643XX_ETH_NAPI
#define MV643XX_ETH_TX_FAST_REFILL
#ifdef MV643XX_ETH_CHECKSUM_OFFLOAD_TX
@@ -616,7 +615,7 @@ static int rxq_process(struct rx_queue *rxq, int budget)
if (cmd_sts & ERROR_SUMMARY)
stats->rx_errors++;
- dev_kfree_skb_irq(skb);
+ dev_kfree_skb(skb);
} else {
/*
* The -4 is for the CRC in the trailer of the
@@ -630,11 +629,7 @@ static int rxq_process(struct rx_queue *rxq, int budget)
(cmd_sts & 0x0007fff8) >> 3);
}
skb->protocol = eth_type_trans(skb, mp->dev);
-#ifdef MV643XX_ETH_NAPI
netif_receive_skb(skb);
-#else
- netif_rx(skb);
-#endif
}
mp->dev->last_rx = jiffies;
@@ -645,7 +640,6 @@ static int rxq_process(struct rx_queue *rxq, int budget)
return rx;
}
-#ifdef MV643XX_ETH_NAPI
static int mv643xx_eth_poll(struct napi_struct *napi, int budget)
{
struct mv643xx_eth_private *mp;
@@ -681,7 +675,6 @@ static int mv643xx_eth_poll(struct napi_struct *napi, int budget)
return rx;
}
-#endif
/* tx ***********************************************************************/
@@ -1856,7 +1849,6 @@ static irqreturn_t mv643xx_eth_irq(int irq, void *dev_id)
/*
* RxBuffer or RxError set for any of the 8 queues?
*/
-#ifdef MV643XX_ETH_NAPI
if (int_cause & INT_RX) {
wrl(mp, INT_CAUSE(mp->port_num), ~(int_cause & INT_RX));
wrl(mp, INT_MASK(mp->port_num), 0x00000000);
@@ -1864,15 +1856,6 @@ static irqreturn_t mv643xx_eth_irq(int irq, void *dev_id)
netif_rx_schedule(dev, &mp->napi);
}
-#else
- if (int_cause & INT_RX) {
- int i;
-
- for (i = 7; i >= 0; i--)
- if (mp->rxq_mask & (1 << i))
- rxq_process(mp->rxq + i, INT_MAX);
- }
-#endif
/*
* TxBuffer or TxError set for any of the 8 queues?
@@ -2101,9 +2084,7 @@ static int mv643xx_eth_open(struct net_device *dev)
}
}
-#ifdef MV643XX_ETH_NAPI
napi_enable(&mp->napi);
-#endif
netif_carrier_off(dev);
netif_stop_queue(dev);
@@ -2167,9 +2148,8 @@ static int mv643xx_eth_stop(struct net_device *dev)
wrl(mp, INT_MASK(mp->port_num), 0x00000000);
rdl(mp, INT_MASK(mp->port_num));
-#ifdef MV643XX_ETH_NAPI
napi_disable(&mp->napi);
-#endif
+
netif_carrier_off(dev);
netif_stop_queue(dev);
@@ -2632,9 +2612,8 @@ static int mv643xx_eth_probe(struct platform_device *pdev)
mp->port_num = pd->port_number;
mp->dev = dev;
-#ifdef MV643XX_ETH_NAPI
+
netif_napi_add(dev, &mp->napi, mv643xx_eth_poll, 64);
-#endif
set_params(mp, pd);
@@ -2700,10 +2679,6 @@ static int mv643xx_eth_probe(struct platform_device *pdev)
if (dev->features & NETIF_F_IP_CSUM)
dev_printk(KERN_NOTICE, &dev->dev, "tx checksum offload\n");
-#ifdef MV643XX_ETH_NAPI
- dev_printk(KERN_NOTICE, &dev->dev, "napi enabled\n");
-#endif
-
if (mp->tx_desc_sram_size > 0)
dev_printk(KERN_NOTICE, &dev->dev, "configured with sram\n");
--
1.5.6.4
--
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