amd8111e.c

		netif_carrier_off(dev);
	}
		
	return 0;
}
/*
This function reads the mib counters. 	 
*/
static int amd8111e_read_mib(void __iomem *mmio, u8 MIB_COUNTER)
{
	unsigned int  status;
	unsigned  int data;
	unsigned int repeat = REPEAT_CNT;

	writew( MIB_RD_CMD | MIB_COUNTER, mmio + MIB_ADDR);
	do {
		status = readw(mmio + MIB_ADDR);
		udelay(2);	/* controller takes MAX 2 us to get mib data */
	}
	while (--repeat && (status & MIB_CMD_ACTIVE));

	data = readl(mmio + MIB_DATA);
	return data;
}

/*
This function reads the mib registers and returns the hardware statistics. It  updates previous internal driver statistics with new values.
*/ 
static struct net_device_stats *amd8111e_get_stats(struct net_device * dev)
{
	struct amd8111e_priv *lp = netdev_priv(dev);
	void __iomem *mmio = lp->mmio;
	unsigned long flags;
	/* struct net_device_stats *prev_stats = &lp->prev_stats; */
	struct net_device_stats* new_stats = &lp->stats;
	
	if(!lp->opened)
		return &lp->stats;	
	spin_lock_irqsave (&lp->lock, flags);

	/* stats.rx_packets */
	new_stats->rx_packets = amd8111e_read_mib(mmio, rcv_broadcast_pkts)+
				amd8111e_read_mib(mmio, rcv_multicast_pkts)+
				amd8111e_read_mib(mmio, rcv_unicast_pkts);

	/* stats.tx_packets */
	new_stats->tx_packets = amd8111e_read_mib(mmio, xmt_packets);

	/*stats.rx_bytes */
	new_stats->rx_bytes = amd8111e_read_mib(mmio, rcv_octets);

	/* stats.tx_bytes */
	new_stats->tx_bytes = amd8111e_read_mib(mmio, xmt_octets);

	/* stats.rx_errors */
	/* hw errors + errors driver reported */
	new_stats->rx_errors = amd8111e_read_mib(mmio, rcv_undersize_pkts)+
				amd8111e_read_mib(mmio, rcv_fragments)+
				amd8111e_read_mib(mmio, rcv_jabbers)+
				amd8111e_read_mib(mmio, rcv_alignment_errors)+
				amd8111e_read_mib(mmio, rcv_fcs_errors)+
				amd8111e_read_mib(mmio, rcv_miss_pkts)+
				lp->drv_rx_errors;

	/* stats.tx_errors */
	new_stats->tx_errors = amd8111e_read_mib(mmio, xmt_underrun_pkts);

	/* stats.rx_dropped*/
	new_stats->rx_dropped = amd8111e_read_mib(mmio, rcv_miss_pkts);

	/* stats.tx_dropped*/
	new_stats->tx_dropped = amd8111e_read_mib(mmio,  xmt_underrun_pkts);

	/* stats.multicast*/
	new_stats->multicast = amd8111e_read_mib(mmio, rcv_multicast_pkts);

	/* stats.collisions*/
	new_stats->collisions = amd8111e_read_mib(mmio, xmt_collisions);

	/* stats.rx_length_errors*/
	new_stats->rx_length_errors = 
		amd8111e_read_mib(mmio, rcv_undersize_pkts)+
		amd8111e_read_mib(mmio, rcv_oversize_pkts);

	/* stats.rx_over_errors*/
	new_stats->rx_over_errors = amd8111e_read_mib(mmio, rcv_miss_pkts);

	/* stats.rx_crc_errors*/
	new_stats->rx_crc_errors = amd8111e_read_mib(mmio, rcv_fcs_errors);

	/* stats.rx_frame_errors*/
	new_stats->rx_frame_errors =
		amd8111e_read_mib(mmio, rcv_alignment_errors);

	/* stats.rx_fifo_errors */
	new_stats->rx_fifo_errors = amd8111e_read_mib(mmio, rcv_miss_pkts);

	/* stats.rx_missed_errors */
	new_stats->rx_missed_errors = amd8111e_read_mib(mmio, rcv_miss_pkts);

	/* stats.tx_aborted_errors*/
	new_stats->tx_aborted_errors = 
		amd8111e_read_mib(mmio, xmt_excessive_collision);

	/* stats.tx_carrier_errors*/
	new_stats->tx_carrier_errors = 
		amd8111e_read_mib(mmio, xmt_loss_carrier);

	/* stats.tx_fifo_errors*/
	new_stats->tx_fifo_errors = amd8111e_read_mib(mmio, xmt_underrun_pkts);

	/* stats.tx_window_errors*/
	new_stats->tx_window_errors =
		amd8111e_read_mib(mmio, xmt_late_collision);

	/* Reset the mibs for collecting new statistics */
	/* writew(MIB_CLEAR, mmio + MIB_ADDR);*/
		
	spin_unlock_irqrestore (&lp->lock, flags);

	return new_stats;
}
/* This function recalculate the interupt coalescing  mode on every interrupt 
according to the datarate and the packet rate.
*/
static int amd8111e_calc_coalesce(struct net_device *dev)
{
	struct amd8111e_priv *lp = netdev_priv(dev);
	struct amd8111e_coalesce_conf * coal_conf = &lp->coal_conf;
	int tx_pkt_rate;
	int rx_pkt_rate;
	int tx_data_rate;
	int rx_data_rate;
	int rx_pkt_size;
	int tx_pkt_size;

	tx_pkt_rate = coal_conf->tx_packets - coal_conf->tx_prev_packets;
	coal_conf->tx_prev_packets =  coal_conf->tx_packets;
	
	tx_data_rate = coal_conf->tx_bytes - coal_conf->tx_prev_bytes;
	coal_conf->tx_prev_bytes =  coal_conf->tx_bytes;
	
	rx_pkt_rate = coal_conf->rx_packets - coal_conf->rx_prev_packets;
	coal_conf->rx_prev_packets =  coal_conf->rx_packets;
	
	rx_data_rate = coal_conf->rx_bytes - coal_conf->rx_prev_bytes;
	coal_conf->rx_prev_bytes =  coal_conf->rx_bytes;
	
	if(rx_pkt_rate < 800){
		if(coal_conf->rx_coal_type != NO_COALESCE){
			
			coal_conf->rx_timeout = 0x0;
			coal_conf->rx_event_count = 0;
			amd8111e_set_coalesce(dev,RX_INTR_COAL);
			coal_conf->rx_coal_type = NO_COALESCE;
		}
	}
	else{
	
		rx_pkt_size = rx_data_rate/rx_pkt_rate;
		if (rx_pkt_size < 128){
			if(coal_conf->rx_coal_type != NO_COALESCE){
			
				coal_conf->rx_timeout = 0;
				coal_conf->rx_event_count = 0;
				amd8111e_set_coalesce(dev,RX_INTR_COAL);
				coal_conf->rx_coal_type = NO_COALESCE;
			}

		}
		else if ( (rx_pkt_size >= 128) && (rx_pkt_size < 512) ){
	
			if(coal_conf->rx_coal_type !=  LOW_COALESCE){
				coal_conf->rx_timeout = 1;
				coal_conf->rx_event_count = 4;
				amd8111e_set_coalesce(dev,RX_INTR_COAL);
				coal_conf->rx_coal_type = LOW_COALESCE;
			}
		}
		else if ((rx_pkt_size >= 512) && (rx_pkt_size < 1024)){
			
			if(coal_conf->rx_coal_type !=  MEDIUM_COALESCE){
				coal_conf->rx_timeout = 1;
				coal_conf->rx_event_count = 4;
				amd8111e_set_coalesce(dev,RX_INTR_COAL);
				coal_conf->rx_coal_type = MEDIUM_COALESCE;
			}		
				
		}
		else if(rx_pkt_size >= 1024){
			if(coal_conf->rx_coal_type !=  HIGH_COALESCE){
				coal_conf->rx_timeout = 2;
				coal_conf->rx_event_count = 3;
				amd8111e_set_coalesce(dev,RX_INTR_COAL);
				coal_conf->rx_coal_type = HIGH_COALESCE;
			}		
		}
	}
    	/* NOW FOR TX INTR COALESC */
	if(tx_pkt_rate < 800){
		if(coal_conf->tx_coal_type != NO_COALESCE){
			
			coal_conf->tx_timeout = 0x0;
			coal_conf->tx_event_count = 0;
			amd8111e_set_coalesce(dev,TX_INTR_COAL);
			coal_conf->tx_coal_type = NO_COALESCE;
		}
	}
	else{
	
		tx_pkt_size = tx_data_rate/tx_pkt_rate;
		if (tx_pkt_size < 128){
		
			if(coal_conf->tx_coal_type != NO_COALESCE){
			
				coal_conf->tx_timeout = 0;
				coal_conf->tx_event_count = 0;
				amd8111e_set_coalesce(dev,TX_INTR_COAL);
				coal_conf->tx_coal_type = NO_COALESCE;
			}

		}
		else if ( (tx_pkt_size >= 128) && (tx_pkt_size < 512) ){
	
			if(coal_conf->tx_coal_type !=  LOW_COALESCE){
				coal_conf->tx_timeout = 1;
				coal_conf->tx_event_count = 2;
				amd8111e_set_coalesce(dev,TX_INTR_COAL);
				coal_conf->tx_coal_type = LOW_COALESCE;

			}
		}
		else if ((tx_pkt_size >= 512) && (tx_pkt_size < 1024)){
			
			if(coal_conf->tx_coal_type !=  MEDIUM_COALESCE){
				coal_conf->tx_timeout = 2;
				coal_conf->tx_event_count = 5;
				amd8111e_set_coalesce(dev,TX_INTR_COAL);
				coal_conf->tx_coal_type = MEDIUM_COALESCE;
			}		
				
		}
		else if(tx_pkt_size >= 1024){
			if (tx_pkt_size >= 1024){
				if(coal_conf->tx_coal_type !=  HIGH_COALESCE){
					coal_conf->tx_timeout = 4;
					coal_conf->tx_event_count = 8;
					amd8111e_set_coalesce(dev,TX_INTR_COAL);
					coal_conf->tx_coal_type = HIGH_COALESCE;
				}		
			}
		}
	}
	return 0;

}
/*
This is device interrupt function. It handles transmit, receive,link change and hardware timer interrupts.
*/
static irqreturn_t amd8111e_interrupt(int irq, void *dev_id, struct pt_regs *regs)
{

	struct net_device * dev = (struct net_device *) dev_id;
	struct amd8111e_priv *lp = netdev_priv(dev);
	void __iomem *mmio = lp->mmio;
	unsigned int intr0, intren0;
	unsigned int handled = 1;

	if(unlikely(dev == NULL))
		return IRQ_NONE;

	spin_lock(&lp->lock);

	/* disabling interrupt */
	writel(INTREN, mmio + CMD0);

	/* Read interrupt status */
	intr0 = readl(mmio + INT0);
	intren0 = readl(mmio + INTEN0);

	/* Process all the INT event until INTR bit is clear. */

	if (!(intr0 & INTR)){
		handled = 0;
		goto err_no_interrupt;
	}
		 
	/* Current driver processes 4 interrupts : RINT,TINT,LCINT,STINT */
	writel(intr0, mmio + INT0);

	/* Check if Receive Interrupt has occurred. */
#ifdef CONFIG_AMD8111E_NAPI
	if(intr0 & RINT0){
		if(netif_rx_schedule_prep(dev)){
			/* Disable receive interupts */
			writel(RINTEN0, mmio + INTEN0);
			/* Schedule a polling routine */
			__netif_rx_schedule(dev);
		}
		else if (intren0 & RINTEN0) {
			printk("************Driver bug! \
				interrupt while in poll\n");
			/* Fix by disable receive interrupts */
			writel(RINTEN0, mmio + INTEN0);
		}
	}
#else
	if(intr0 & RINT0){
		amd8111e_rx(dev);
		writel(VAL2 | RDMD0, mmio + CMD0);
	}
#endif /* CONFIG_AMD8111E_NAPI */
	/* Check if  Transmit Interrupt has occurred. */
	if(intr0 & TINT0)
		amd8111e_tx(dev);
		
	/* Check if  Link Change Interrupt has occurred. */
	if (intr0 & LCINT)
		amd8111e_link_change(dev);

	/* Check if Hardware Timer Interrupt has occurred. */
	if (intr0 & STINT)
		amd8111e_calc_coalesce(dev);

err_no_interrupt:
	writel( VAL0 | INTREN,mmio + CMD0);
	
	spin_unlock(&lp->lock);
	
	return IRQ_RETVAL(handled);
}

#ifdef CONFIG_NET_POLL_CONTROLLER
static void amd8111e_poll(struct net_device *dev)
{ 
	unsigned long flags;
	local_save_flags(flags); 
	local_irq_disable();
	amd8111e_interrupt(0, dev, NULL);
	local_irq_restore(flags); 
} 
#endif


/*
This function closes the network interface and updates the statistics so that most recent statistics will be available after the interface is down.
*/
static int amd8111e_close(struct net_device * dev)
{
	struct amd8111e_priv *lp = netdev_priv(dev);
	netif_stop_queue(dev);
	
	spin_lock_irq(&lp->lock);
	
	amd8111e_disable_interrupt(lp);
	amd8111e_stop_chip(lp);
	amd8111e_free_ring(lp);
	
	netif_carrier_off(lp->amd8111e_net_dev);

	/* Delete ipg timer */
	if(lp->options & OPTION_DYN_IPG_ENABLE)	        
		del_timer_sync(&lp->ipg_data.ipg_timer);

	spin_unlock_irq(&lp->lock);
	free_irq(dev->irq, dev);
	
	/* Update the statistics before closing */
	amd8111e_get_stats(dev);
	lp->opened = 0;
	return 0;
}
/* This function opens new interface.It requests irq for the device, initializes the device,buffers and descriptors, and starts the device. 
*/
static int amd8111e_open(struct net_device * dev )
{
	struct amd8111e_priv *lp = netdev_priv(dev);

	if(dev->irq ==0 || request_irq(dev->irq, amd8111e_interrupt, SA_SHIRQ,
					 dev->name, dev)) 
		return -EAGAIN;

	spin_lock_irq(&lp->lock);

	amd8111e_init_hw_default(lp);

	if(amd8111e_restart(dev)){
		spin_unlock_irq(&lp->lock);
		if (dev->irq)
			free_irq(dev->irq, dev);
		return -ENOMEM;
	}
	/* Start ipg timer */
	if(lp->options & OPTION_DYN_IPG_ENABLE){	        
		add_timer(&lp->ipg_data.ipg_timer);
		printk(KERN_INFO "%s: Dynamic IPG Enabled.\n",dev->name);
	}

	lp->opened = 1;

	spin_unlock_irq(&lp->lock);

	netif_start_queue(dev);

	return 0;		
}
/* 
This function checks if there is any transmit  descriptors available to queue more packet.
*/
static int amd8111e_tx_queue_avail(struct amd8111e_priv* lp )
{	
	int tx_index = lp->tx_idx & TX_BUFF_MOD_MASK;
	if(lp->tx_skbuff[tx_index] != 0)
		return -1;
	else
		return 0;
	
}
/* 
This function will queue the transmit packets to the descriptors and will trigger the send operation. It also initializes the transmit descriptors with buffer physical address, byte count, ownership to hardware etc.
*/

static int amd8111e_start_xmit(struct sk_buff *skb, struct net_device * dev)
{
	struct amd8111e_priv *lp = netdev_priv(dev);
	int tx_index;
	unsigned long flags;

	spin_lock_irqsave(&lp->lock, flags);

	tx_index = lp->tx_idx & TX_RING_DR_MOD_MASK;

	lp->tx_ring[tx_index].buff_count = cpu_to_le16(skb->len);

	lp->tx_skbuff[tx_index] = skb;
	lp->tx_ring[tx_index].tx_flags = 0;

#if AMD8111E_VLAN_TAG_USED
	if((lp->vlgrp != NULL) && vlan_tx_tag_present(skb)){
		lp->tx_ring[tx_index].tag_ctrl_cmd |= 
				cpu_to_le16(TCC_VLAN_INSERT);	
		lp->tx_ring[tx_index].tag_ctrl_info = 
				cpu_to_le16(vlan_tx_tag_get(skb));

	}
#endif
	lp->tx_dma_addr[tx_index] =
	    pci_map_single(lp->pci_dev, skb->data, skb->len, PCI_DMA_TODEVICE);
	lp->tx_ring[tx_index].buff_phy_addr =
	    (u32) cpu_to_le32(lp->tx_dma_addr[tx_index]);

	/*  Set FCS and LTINT bits */
	wmb();
	lp->tx_ring[tx_index].tx_flags |=
	    cpu_to_le16(OWN_BIT | STP_BIT | ENP_BIT|ADD_FCS_BIT|LTINT_BIT);

	lp->tx_idx++;

	/* Trigger an immediate send poll. */
	writel( VAL1 | TDMD0, lp->mmio + CMD0);
	writel( VAL2 | RDMD0,lp->mmio + CMD0);

	dev->trans_start = jiffies;

	if(amd8111e_tx_queue_avail(lp) < 0){
		netif_stop_queue(dev);
	}
	spin_unlock_irqrestore(&lp->lock, flags);
	return 0;
}
/*
This function returns all the memory mapped registers of the device.
*/
static void amd8111e_read_regs(struct amd8111e_priv *lp, u32 *buf)
{
	void __iomem *mmio = lp->mmio;
	/* Read only necessary registers */
	buf[0] = readl(mmio + XMT_RING_BASE_ADDR0);
	buf[1] = readl(mmio + XMT_RING_LEN0);
	buf[2] = readl(mmio + RCV_RING_BASE_ADDR0);
	buf[3] = readl(mmio + RCV_RING_LEN0);
	buf[4] = readl(mmio + CMD0);
	buf[5] = readl(mmio + CMD2);
	buf[6] = readl(mmio + CMD3);
	buf[7] = readl(mmio + CMD7);
	buf[8] = readl(mmio + INT0);
	buf[9] = readl(mmio + INTEN0);
	buf[10] = readl(mmio + LADRF);
	buf[11] = readl(mmio + LADRF+4);
	buf[12] = readl(mmio + STAT0);
}

/*
amd8111e crc generator implementation is different from the kernel
ether_crc() function.
*/
static int amd8111e_ether_crc(int len, char* mac_addr)
{
	int i,byte;
	unsigned char octet;
	u32 crc= INITCRC;

	for(byte=0; byte < len; byte++){
		octet = mac_addr[byte];
		for( i=0;i < 8; i++){
			/*If the next bit form the input stream is 1,subtract				 the divisor (CRC32) from the dividend(crc).*/
			if( (octet & 0x1) ^ (crc & 0x1) ){
				crc >>= 1;
				crc ^= CRC32;
			}
			else
				crc >>= 1;
			
			octet >>= 1;
		}
	}	
	return crc; 
}
/*
This function sets promiscuos mode, all-multi mode or the multicast address 
list to the device.
*/
static void amd8111e_set_multicast_list(struct net_device *dev)
{
	struct dev_mc_list* mc_ptr;
	struct amd8111e_priv *lp = netdev_priv(dev);
	u32 mc_filter[2] ;
	int i,bit_num;
	if(dev->flags & IFF_PROMISC){
		printk(KERN_INFO "%s: Setting  promiscuous mode.\n",dev->name);
		writel( VAL2 | PROM, lp->mmio + CMD2);
		return;
	}
	else
		writel( PROM, lp->mmio + CMD2);
	if(dev->flags & IFF_ALLMULTI || dev->mc_count > MAX_FILTER_SIZE){
		/* get all multicast packet */
		mc_filter[1] = mc_filter[0] = 0xffffffff;
		lp->mc_list = dev->mc_list;
		lp->options |= OPTION_MULTICAST_ENABLE;
		amd8111e_writeq(*(u64*)mc_filter,lp->mmio + LADRF);
		return;
	}
	if( dev->mc_count == 0 ){
		/* get only own packets */
		mc_filter[1] = mc_filter[0] = 0;
		lp->mc_list = NULL;
		lp->options &= ~OPTION_MULTICAST_ENABLE;
		amd8111e_writeq(*(u64*)mc_filter,lp->mmio + LADRF);
		/* disable promiscous mode */
		writel(PROM, lp->mmio + CMD2);
		return;
	}
	/* load all the multicast addresses in the logic filter */
	lp->options |= OPTION_MULTICAST_ENABLE;
	lp->mc_list = dev->mc_list;
	mc_filter[1] = mc_filter[0] = 0;
	for (i = 0, mc_ptr = dev->mc_list; mc_ptr && i < dev->mc_count;
		     i++, mc_ptr = mc_ptr->next) {
		bit_num = ( amd8111e_ether_crc(ETH_ALEN,mc_ptr->dmi_addr)							 >> 26 ) & 0x3f;
		mc_filter[bit_num >> 5] |= 1 << (bit_num & 31);
	}	
	amd8111e_writeq(*(u64*)mc_filter,lp->mmio+ LADRF);

	/* To eliminate PCI posting bug */
	readl(lp->mmio + CMD2);

}

static void amd8111e_get_drvinfo(struct net_device* dev, struct ethtool_drvinfo *info)
{
	struct amd8111e_priv *lp = netdev_priv(dev);
	struct pci_dev *pci_dev = lp->pci_dev;
	strcpy (info->driver, MODULE_NAME);
	strcpy (info->version, MODULE_VERS);
	sprintf(info->fw_version,"%u",chip_version);
	strcpy (info->bus_info, pci_name(pci_dev));
}

static int amd8111e_get_regs_len(struct net_device *dev)
{
	return AMD8111E_REG_DUMP_LEN;
}

static void amd8111e_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *buf)
{
	struct amd8111e_priv *lp = netdev_priv(dev);
	regs->version = 0;
	amd8111e_read_regs(lp, buf);
}

static int amd8111e_get_settings(struct net_device *dev, struct ethtool_cmd *ecmd)
{
	struct amd8111e_priv *lp = netdev_priv(dev);
	spin_lock_irq(&lp->lock);
	mii_ethtool_gset(&lp->mii_if, ecmd);
	spin_unlock_irq(&lp->lock);
	return 0;
}

static int amd8111e_set_settings(struct net_device *dev, struct ethtool_cmd *ecmd)
{
	struct amd8111e_priv *lp = netdev_priv(dev);
	int res;
	spin_lock_irq(&lp->lock);
	res = mii_ethtool_sset(&lp->mii_if, ecmd);
	spin_unlock_irq(&lp->lock);
	return res;
}

static int amd8111e_nway_reset(struct net_device *dev)
{
	struct amd8111e_priv *lp = netdev_priv(dev);
	return mii_nway_restart(&lp->mii_if);
}

static u32 amd8111e_get_link(struct net_device *dev)
{
	struct amd8111e_priv *lp = netdev_priv(dev);
	return mii_link_ok(&lp->mii_if);
}

static void amd8111e_get_wol(struct net_device *dev, struct ethtool_wolinfo *wol_info)
{
	struct amd8111e_priv *lp = netdev_priv(dev);
	wol_info->supported = WAKE_MAGIC|WAKE_PHY;
	if (lp->options & OPTION_WOL_ENABLE)
		wol_info->wolopts = WAKE_MAGIC;
}

static int amd8111e_set_wol(struct net_device *dev, struct ethtool_wolinfo *wol_info)
{
	struct amd8111e_priv *lp = netdev_priv(dev);
	if (wol_info->wolopts & ~(WAKE_MAGIC|WAKE_PHY))
		return -EINVAL;
	spin_lock_irq(&lp->lock);
	if (wol_info->wolopts & WAKE_MAGIC)
		lp->options |= 
			(OPTION_WOL_ENABLE | OPTION_WAKE_MAGIC_ENABLE);
	else if(wol_info->wolopts & WAKE_PHY)
		lp->options |= 
			(OPTION_WOL_ENABLE | OPTION_WAKE_PHY_ENABLE);
	else
		lp->options &= ~OPTION_WOL_ENABLE; 
	spin_unlock_irq(&lp->lock);
	return 0;
}

static struct ethtool_ops ops = {
	.get_drvinfo = amd8111e_get_drvinfo,
	.get_regs_len = amd8111e_get_regs_len,
	.get_regs = amd8111e_get_regs,
	.get_settings = amd8111e_get_settings,
	.set_settings = amd8111e_set_settings,
	.nway_reset = amd8111e_nway_reset,
	.get_link = amd8111e_get_link,
	.get_wol = amd8111e_get_wol,
	.set_wol = amd8111e_set_wol,
};

/*
This function handles all the  ethtool ioctls. It gives driver info, gets/sets driver speed, gets memory mapped register values, forces auto negotiation, sets/gets WOL options for ethtool application. 
*/
	
static int amd8111e_ioctl(struct net_device * dev , struct ifreq *ifr, int cmd)
{
	struct mii_ioctl_data *data = if_mii(ifr);
	struct amd8111e_priv *lp = netdev_priv(dev);
	int err;
	u32 mii_regval;

	if (!capable(CAP_NET_ADMIN))
		return -EPERM;

	switch(cmd) {
	case SIOCGMIIPHY:
		data->phy_id = lp->ext_phy_addr;

	/* fallthru */
	case SIOCGMIIREG: 

		spin_lock_irq(&lp->lock);
		err = amd8111e_read_phy(lp, data->phy_id,
			data->reg_num & PHY_REG_ADDR_MASK, &mii_regval);
		spin_unlock_irq(&lp->lock);

		data->val_out = mii_regval;
		return err;

	case SIOCSMIIREG:

		spin_lock_irq(&lp->lock);
		err = amd8111e_write_phy(lp, data->phy_id,
			data->reg_num & PHY_REG_ADDR_MASK, data->val_in);
		spin_unlock_irq(&lp->lock);

		return err;

	default:
		/* do nothing */
		break;
	}
	return -EOPNOTSUPP;
}
static int amd8111e_set_mac_address(struct net_device *dev, void *p)
{
	struct amd8111e_priv *lp = netdev_priv(dev);
	int i;
	struct sockaddr *addr = p;

	memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
	spin_lock_irq(&lp->lock);
	/* Setting the MAC address to the device */
	for(i = 0; i < ETH_ADDR_LEN; i++)
		writeb( dev->dev_addr[i], lp->mmio + PADR + i ); 
		
	spin_unlock_irq(&lp->lock);

	return 0;
}

/* 
This function changes the mtu of the device. It restarts the device  to initialize the descriptor with new receive buffers.
*/  
static int amd8111e_change_mtu(struct net_device *dev, int new_mtu)
{
	struct amd8111e_priv *lp = netdev_priv(dev);
	int err;

	if ((new_mtu < AMD8111E_MIN_MTU) || (new_mtu > AMD8111E_MAX_MTU))
		return -EINVAL;

	if (!netif_running(dev)) {
		/* new_mtu will be used
		   when device starts netxt time */ 
		dev->mtu = new_mtu;
		return 0;
	}

	spin_lock_irq(&lp->lock);

        /* stop the chip */
	writel(RUN, lp->mmio + CMD0);

	dev->mtu = new_mtu;

	err = amd8111e_restart(dev);
	spin_unlock_irq(&lp->lock);
	if(!err)
		netif_start_queue(dev);
	return err;
}

#if AMD8111E_VLAN_TAG_USED
static void amd8111e_vlan_rx_register(struct net_device *dev, struct vlan_group *grp)
{
	struct  amd8111e_priv *lp = netdev_priv(dev);
	spin_lock_irq(&lp->lock);
	lp->vlgrp = grp;
	spin_unlock_irq(&lp->lock);
}
	
static void amd8111e_vlan_rx_kill_vid(struct net_device *dev, unsigned short vid)
{
	struct amd8111e_priv *lp = netdev_priv(dev);
	spin_lock_irq(&lp->lock);
	if (lp->vlgrp)
		lp->vlgrp->vlan_devices[vid] = NULL;
	spin_unlock_irq(&lp->lock);
}
#endif
static int amd8111e_enable_magicpkt(struct amd8111e_priv* lp)
{
	writel( VAL1|MPPLBA, lp->mmio + CMD3);
	writel( VAL0|MPEN_SW, lp->mmio + CMD7);

	/* To eliminate PCI posting bug */
	readl(lp->mmio + CMD7);
	return 0;
}

static int amd8111e_enable_link_change(struct amd8111e_priv* lp)
{

	/* Adapter is already stoped/suspended/interrupt-disabled */
	writel(VAL0|LCMODE_SW,lp->mmio + CMD7);
	
	/* To eliminate PCI posting bug */
	readl(lp->mmio + CMD7);
	return 0;
}	
/* This function is called when a packet transmission fails to complete within a  resonable period, on the assumption that an interrupts have been failed or the  interface is locked up. This function will reinitialize the hardware */

static void amd8111e_tx_timeout(struct net_device *dev)
{
	struct amd8111e_priv* lp = netdev_priv(dev);
	int err;

	printk(KERN_ERR "%s: transmit timed out, resetting\n",
	 					      dev->name);
	spin_lock_irq(&lp->lock);
	err = amd8111e_restart(dev);
	spin_unlock_irq(&lp->lock);
	if(!err)
		netif_wake_queue(dev);
}
static int amd8111e_suspend(struct pci_dev *pci_dev, pm_message_t state)
{	
	struct net_device *dev = pci_get_drvdata(pci_dev);
	struct amd8111e_priv *lp = netdev_priv(dev);
	
	if (!netif_running(dev))
		return 0;

	/* disable the interrupt */
	spin_lock_irq(&lp->lock);
	amd8111e_disable_interrupt(lp);
	spin_unlock_irq(&lp->lock);

	netif_device_detach(dev);
	
	/* stop chip */
	spin_lock_irq(&lp->lock);
	if(lp->options & OPTION_DYN_IPG_ENABLE)	        
		del_timer_sync(&lp->ipg_data.ipg_timer);
	amd8111e_stop_chip(lp);
	spin_unlock_irq(&lp->lock);

	if(lp->options & OPTION_WOL_ENABLE){
		 /* enable wol */
		if(lp->options & OPTION_WAKE_MAGIC_ENABLE)
			amd8111e_enable_magicpkt(lp);	
		if(lp->options & OPTION_WAKE_PHY_ENABLE)
			amd8111e_enable_link_change(lp);	
		
		pci_enable_wake(pci_dev, PCI_D3hot, 1);
		pci_enable_wake(pci_dev, PCI_D3cold, 1);

	}
	else{		
		pci_enable_wake(pci_dev, PCI_D3hot, 0);
		pci_enable_wake(pci_dev, PCI_D3cold, 0);
	}
	
	pci_save_state(pci_dev);
	pci_set_power_state(pci_dev, PCI_D3hot);

	return 0;
}
static int amd8111e_resume(struct pci_dev *pci_dev)
{
	struct net_device *dev = pci_get_drvdata(pci_dev);
	struct amd8111e_priv *lp = netdev_priv(dev);
	
	if (!netif_running(dev))
		return 0;

	pci_set_power_state(pci_dev, PCI_D0);
	pci_restore_state(pci_dev);

	pci_enable_wake(pci_dev, PCI_D3hot, 0);
	pci_enable_wake(pci_dev, PCI_D3cold, 0); /* D3 cold */

	netif_device_attach(dev);

	spin_lock_irq(&lp->lock);
	amd8111e_restart(dev);
	/* Restart ipg timer */
	if(lp->options & OPTION_DYN_IPG_ENABLE)	        
		mod_timer(&lp->ipg_data.ipg_timer, 
				jiffies + IPG_CONVERGE_JIFFIES);
	spin_unlock_irq(&lp->lock);

	return 0;
}


static void __devexit amd8111e_remove_one(struct pci_dev *pdev)
{
	struct net_device *dev = pci_get_drvdata(pdev);
	if (dev) {
		unregister_netdev(dev);
		iounmap(((struct amd8111e_priv *)netdev_priv(dev))->mmio);
		free_netdev(dev);
		pci_release_regions(pdev);
		pci_disable_device(pdev);
		pci_set_drvdata(pdev, NULL);
	}
}
static void amd8111e_config_ipg(struct net_device* dev)
{
	struct amd8111e_priv *lp = netdev_priv(dev);
	struct ipg_info* ipg_data = &lp->ipg_data;
	void __iomem *mmio = lp->mmio;
	unsigned int prev_col_cnt = ipg_data->col_cnt;
	unsigned int total_col_cnt;
	unsigned int tmp_ipg;
	
	if(lp->link_config.duplex == DUPLEX_FULL){
		ipg_data->ipg = DEFAULT_IPG;
		return;
	}

	if(ipg_data->ipg_state == SSTATE){
		
		if(ipg_data->timer_tick == IPG_STABLE_TIME){
			
			ipg_data->timer_tick = 0;
			ipg_data->ipg = MIN_IPG - IPG_STEP;
			ipg_data->current_ipg = MIN_IPG;
			ipg_data->diff_col_cnt = 0xFFFFFFFF;
			ipg_data->ipg_state = CSTATE;
		}
		else
			ipg_data->timer_tick++;
	}

	if(ipg_data->ipg_state == CSTATE){
		
		/* Get the current collision count */

		total_col_cnt = ipg_data->col_cnt = 
				amd8111e_read_mib(mmio, xmt_collisions);

		if ((total_col_cnt - prev_col_cnt) < 
				(ipg_data->diff_col_cnt)){
			
			ipg_data->diff_col_cnt =
				total_col_cnt - prev_col_cnt ;

			ipg_data->ipg = ipg_data->current_ipg;
		}

		ipg_data->current_ipg += IPG_STEP;

		if (ipg_data->current_ipg <= MAX_IPG)
			tmp_ipg = ipg_data->current_ipg;
		else{
			tmp_ipg = ipg_data->ipg;
			ipg_data->ipg_state = SSTATE;
		}
		writew((u32)tmp_ipg, mmio + IPG); 
		writew((u32)(tmp_ipg - IFS1_DELTA), mmio + IFS1); 
	}
	 mod_timer(&lp->ipg_data.ipg_timer, jiffies + IPG_CONVERGE_JIFFIES);
	return;

}

static void __devinit amd8111e_probe_ext_phy(struct net_device* dev)
{
	struct amd8111e_priv *lp = netdev_priv(dev);
	int i;

	for (i = 0x1e; i >= 0; i--) {
		u32 id1, id2;

		if (amd8111e_read_phy(lp, i, MII_PHYSID1, &id1))
			continue;
		if (amd8111e_read_phy(lp, i, MII_PHYSID2, &id2))
			continue;
		lp->ext_phy_id = (id1 << 16) | id2;
		lp->ext_phy_addr = i;
		return;
	}
	lp->ext_phy_id = 0;
	lp->ext_phy_addr = 1;
}

static int __devinit amd8111e_probe_one(struct pci_dev *pdev,
				  const struct pci_device_id *ent)
{
	int err,i,pm_cap;
	unsigned long reg_addr,reg_len;
	struct amd8111e_priv* lp;
	struct net_device* dev;

	err = pci_enable_device(pdev);
	if(err){
		printk(KERN_ERR "amd8111e: Cannot enable new PCI device,"
			"exiting.\n");
		return err;
	}

	if(!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)){
		printk(KERN_ERR "amd8111e: Cannot find PCI base address"
		       "exiting.\n");
		err = -ENODEV;
		goto err_disable_pdev;
	}

	err = pci_request_regions(pdev, MODULE_NAME);
	if(err){
		printk(KERN_ERR "amd8111e: Cannot obtain PCI resources, "
		       "exiting.\n");
		goto err_disable_pdev;
	}

	pci_set_master(pdev);