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Commit 21d0556c authored by David S. Miller's avatar David S. Miller
Browse files

Merge branch 'korina-performance-fixes-and-cleanup' 



Roman Yeryomin says:

====================
korina: performance fixes and cleanup

Changes from v1:
- use GRO instead of increasing ring size
- use NAPI_POLL_WEIGHT instead of defining own NAPI_WEIGHT
- optimize rx descriptor flags processing
====================

Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parents ca444073 da1d2def

drivers/net/ethernet/korina.c

+78 −152
Original line number Diff line number Diff line
@@ -4,6 +4,7 @@ 
 *  Copyright 2004 IDT Inc. (rischelp@idt.com)

 *  Copyright 2006 Felix Fietkau <nbd@openwrt.org>

 *  Copyright 2008 Florian Fainelli <florian@openwrt.org>

 *  Copyright 2017 Roman Yeryomin <roman@advem.lv>

 *

 *  This program is free software; you can redistribute  it and/or modify it

 *  under  the terms of  the GNU General  Public License as published by the
@@ -65,8 +66,8 @@ 
#include <asm/mach-rc32434/dma_v.h>



#define DRV_NAME	"korina"

#define DRV_VERSION     "0.10"

#define DRV_RELDATE     "04Mar2008"

#define DRV_VERSION	"0.20"

#define DRV_RELDATE	"15Sep2017"



#define STATION_ADDRESS_HIGH(dev) (((dev)->dev_addr[0] << 8) | \

				   ((dev)->dev_addr[1]))
@@ -92,7 +93,11 @@ 


#define TX_TIMEOUT	(6000 * HZ / 1000)



enum chain_status { desc_filled, desc_empty };

enum chain_status {

	desc_filled,

	desc_empty

};



#define IS_DMA_FINISHED(X)	(((X) & (DMA_DESC_FINI)) != 0)

#define IS_DMA_DONE(X)		(((X) & (DMA_DESC_DONE)) != 0)

#define RCVPKT_LENGTH(X)	(((X) & ETH_RX_LEN) >> ETH_RX_LEN_BIT)
@@ -122,8 +127,6 @@ struct korina_private { 


	int rx_irq;

	int tx_irq;

	int ovr_irq;

	int und_irq;



	spinlock_t lock;	/* NIC xmit lock */
@@ -365,11 +368,18 @@ static int korina_rx(struct net_device *dev, int limit) 
		if ((KORINA_RBSIZE - (u32)DMA_COUNT(rd->control)) == 0)

			break;



		/* check that this is a whole packet

		 * WARNING: DMA_FD bit incorrectly set

		 * in Rc32434 (errata ref #077) */

		if (!(devcs & ETH_RX_LD))

			goto next;



		if (!(devcs & ETH_RX_ROK)) {

			/* Update statistics counters */

			dev->stats.rx_errors++;

			dev->stats.rx_dropped++;

			if (devcs & ETH_RX_CRC)

				dev->stats.rx_crc_errors++;

		if (devcs & ETH_RX_LOR)

			dev->stats.rx_length_errors++;

			if (devcs & ETH_RX_LE)

				dev->stats.rx_length_errors++;

			if (devcs & ETH_RX_OVR)
@@ -377,17 +387,11 @@ static int korina_rx(struct net_device *dev, int limit) 
			if (devcs & ETH_RX_CV)

				dev->stats.rx_frame_errors++;

			if (devcs & ETH_RX_CES)

			dev->stats.rx_length_errors++;

		if (devcs & ETH_RX_MP)

			dev->stats.multicast++;

				dev->stats.rx_frame_errors++;



			goto next;

		}



		if ((devcs & ETH_RX_LD) != ETH_RX_LD) {

			/* check that this is a whole packet

			 * WARNING: DMA_FD bit incorrectly set

			 * in Rc32434 (errata ref #077) */

			dev->stats.rx_errors++;

			dev->stats.rx_dropped++;

		} else if ((devcs & ETH_RX_ROK)) {

		pkt_len = RCVPKT_LENGTH(devcs);



		/* must be the (first and) last
@@ -407,7 +411,7 @@ static int korina_rx(struct net_device *dev, int limit) 
		skb->protocol = eth_type_trans(skb, dev);



		/* Pass the packet to upper layers */

			netif_receive_skb(skb);

		napi_gro_receive(&lp->napi, skb);

		dev->stats.rx_packets++;

		dev->stats.rx_bytes += pkt_len;
@@ -416,8 +420,8 @@ static int korina_rx(struct net_device *dev, int limit) 
			dev->stats.multicast++;



		lp->rx_skb[lp->rx_next_done] = skb_new;

		}



next:

		rd->devcs = 0;



		/* Restore descriptor's curr_addr */
@@ -891,8 +895,6 @@ static void korina_restart_task(struct work_struct *work) 
	 */

	disable_irq(lp->rx_irq);

	disable_irq(lp->tx_irq);

	disable_irq(lp->ovr_irq);

	disable_irq(lp->und_irq);



	writel(readl(&lp->tx_dma_regs->dmasm) |

				DMA_STAT_FINI | DMA_STAT_ERR,
@@ -911,40 +913,10 @@ static void korina_restart_task(struct work_struct *work) 
	}

	korina_multicast_list(dev);



	enable_irq(lp->und_irq);

	enable_irq(lp->ovr_irq);

	enable_irq(lp->tx_irq);

	enable_irq(lp->rx_irq);

}



static void korina_clear_and_restart(struct net_device *dev, u32 value)

{

	struct korina_private *lp = netdev_priv(dev);



	netif_stop_queue(dev);

	writel(value, &lp->eth_regs->ethintfc);

	schedule_work(&lp->restart_task);

}



/* Ethernet Tx Underflow interrupt */

static irqreturn_t korina_und_interrupt(int irq, void *dev_id)

{

	struct net_device *dev = dev_id;

	struct korina_private *lp = netdev_priv(dev);

	unsigned int und;



	spin_lock(&lp->lock);



	und = readl(&lp->eth_regs->ethintfc);



	if (und & ETH_INT_FC_UND)

		korina_clear_and_restart(dev, und & ~ETH_INT_FC_UND);



	spin_unlock(&lp->lock);



	return IRQ_HANDLED;

}



static void korina_tx_timeout(struct net_device *dev)

{

	struct korina_private *lp = netdev_priv(dev);
@@ -952,25 +924,6 @@ static void korina_tx_timeout(struct net_device *dev) 
	schedule_work(&lp->restart_task);

}



/* Ethernet Rx Overflow interrupt */

static irqreturn_t

korina_ovr_interrupt(int irq, void *dev_id)

{

	struct net_device *dev = dev_id;

	struct korina_private *lp = netdev_priv(dev);

	unsigned int ovr;



	spin_lock(&lp->lock);

	ovr = readl(&lp->eth_regs->ethintfc);



	if (ovr & ETH_INT_FC_OVR)

		korina_clear_and_restart(dev, ovr & ~ETH_INT_FC_OVR);



	spin_unlock(&lp->lock);



	return IRQ_HANDLED;

}



#ifdef CONFIG_NET_POLL_CONTROLLER

static void korina_poll_controller(struct net_device *dev)

{
@@ -993,8 +946,7 @@ static int korina_open(struct net_device *dev) 
	}



	/* Install the interrupt handler

	 * that handles the Done Finished

	 * Ovr and Und Events */

	 * that handles the Done Finished */

	ret = request_irq(lp->rx_irq, korina_rx_dma_interrupt,

			0, "Korina ethernet Rx", dev);

	if (ret < 0) {
@@ -1010,31 +962,10 @@ static int korina_open(struct net_device *dev) 
		goto err_free_rx_irq;

	}



	/* Install handler for overrun error. */

	ret = request_irq(lp->ovr_irq, korina_ovr_interrupt,

			0, "Ethernet Overflow", dev);

	if (ret < 0) {

		printk(KERN_ERR "%s: unable to get OVR IRQ %d\n",

		    dev->name, lp->ovr_irq);

		goto err_free_tx_irq;

	}



	/* Install handler for underflow error. */

	ret = request_irq(lp->und_irq, korina_und_interrupt,

			0, "Ethernet Underflow", dev);

	if (ret < 0) {

		printk(KERN_ERR "%s: unable to get UND IRQ %d\n",

		    dev->name, lp->und_irq);

		goto err_free_ovr_irq;

	}

	mod_timer(&lp->media_check_timer, jiffies + 1);

out:

	return ret;



err_free_ovr_irq:

	free_irq(lp->ovr_irq, dev);

err_free_tx_irq:

	free_irq(lp->tx_irq, dev);

err_free_rx_irq:

	free_irq(lp->rx_irq, dev);

err_release:
@@ -1052,8 +983,6 @@ static int korina_close(struct net_device *dev) 
	/* Disable interrupts */

	disable_irq(lp->rx_irq);

	disable_irq(lp->tx_irq);

	disable_irq(lp->ovr_irq);

	disable_irq(lp->und_irq);



	korina_abort_tx(dev);

	tmp = readl(&lp->tx_dma_regs->dmasm);
@@ -1073,8 +1002,6 @@ static int korina_close(struct net_device *dev) 


	free_irq(lp->rx_irq, dev);

	free_irq(lp->tx_irq, dev);

	free_irq(lp->ovr_irq, dev);

	free_irq(lp->und_irq, dev);



	return 0;

}
@@ -1113,8 +1040,6 @@ static int korina_probe(struct platform_device *pdev) 


	lp->rx_irq = platform_get_irq_byname(pdev, "korina_rx");

	lp->tx_irq = platform_get_irq_byname(pdev, "korina_tx");

	lp->ovr_irq = platform_get_irq_byname(pdev, "korina_ovr");

	lp->und_irq = platform_get_irq_byname(pdev, "korina_und");



	r = platform_get_resource_byname(pdev, IORESOURCE_MEM, "korina_regs");

	dev->base_addr = r->start;
@@ -1162,7 +1087,7 @@ static int korina_probe(struct platform_device *pdev) 
	dev->netdev_ops = &korina_netdev_ops;

	dev->ethtool_ops = &netdev_ethtool_ops;

	dev->watchdog_timeo = TX_TIMEOUT;

	netif_napi_add(dev, &lp->napi, korina_poll, 64);

	netif_napi_add(dev, &lp->napi, korina_poll, NAPI_POLL_WEIGHT);



	lp->phy_addr = (((lp->rx_irq == 0x2c? 1:0) << 8) | 0x05);

	lp->mii_if.dev = dev;
@@ -1226,5 +1151,6 @@ module_platform_driver(korina_driver); 
MODULE_AUTHOR("Philip Rischel <rischelp@idt.com>");

MODULE_AUTHOR("Felix Fietkau <nbd@openwrt.org>");

MODULE_AUTHOR("Florian Fainelli <florian@openwrt.org>");

MODULE_AUTHOR("Roman Yeryomin <roman@advem.lv>");

MODULE_DESCRIPTION("IDT RC32434 (Korina) Ethernet driver");

MODULE_LICENSE("GPL");