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Commit 78fff83b authored by Lennert Buytenhek's avatar Lennert Buytenhek Committed by Lennert Buytenhek
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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: default avatarLennert Buytenhek <buytenh@marvell.com>
parent 45c5d3bc

drivers/net/mv643xx_eth.c

+3 −28
Original line number Diff line number Diff line
@@ -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");