Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 2166 insertions, 0 deletions

diff --git a/drivers/net/ixgb/ixgb_main.c b/drivers/net/ixgb/ixgb_main.c
new file mode 100644
index 000000000000..7d26623d8592
--- /dev/null
+++ b/drivers/net/ixgb/ixgb_main.c
@@ -0,0 +1,2166 @@
+/*******************************************************************************
+
+  
+  Copyright(c) 1999 - 2005 Intel Corporation. All rights reserved.
+  
+  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 Free 
+  Software Foundation; either version 2 of the License, or (at your option) 
+  any later version.
+  
+  This program is distributed in the hope that it will be useful, but WITHOUT 
+  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 
+  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for 
+  more details.
+  
+  You should have received a copy of the GNU General Public License along with
+  this program; if not, write to the Free Software Foundation, Inc., 59 
+  Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+  
+  The full GNU General Public License is included in this distribution in the
+  file called LICENSE.
+  
+  Contact Information:
+  Linux NICS <linux.nics@intel.com>
+  Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
+
+*******************************************************************************/
+
+#include "ixgb.h"
+
+/* Change Log
+ * 1.0.88 01/05/05
+ * - include fix to the condition that determines when to quit NAPI - Robert Olsson
+ * - use netif_poll_{disable/enable} to synchronize between NAPI and i/f up/down
+ * 1.0.84 10/26/04
+ * - reset buffer_info->dma in Tx resource cleanup logic
+ * 1.0.83 10/12/04
+ * - sparse cleanup - shemminger@osdl.org
+ * - fix tx resource cleanup logic
+ */
+
+char ixgb_driver_name[] = "ixgb";
+char ixgb_driver_string[] = "Intel(R) PRO/10GbE Network Driver";
+
+#ifndef CONFIG_IXGB_NAPI
+#define DRIVERNAPI
+#else
+#define DRIVERNAPI "-NAPI"
+#endif
+char ixgb_driver_version[] = "1.0.90-k2"DRIVERNAPI;
+char ixgb_copyright[] = "Copyright (c) 1999-2005 Intel Corporation.";
+
+/* ixgb_pci_tbl - PCI Device ID Table
+ *
+ * Wildcard entries (PCI_ANY_ID) should come last
+ * Last entry must be all 0s
+ *
+ * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
+ *   Class, Class Mask, private data (not used) }
+ */
+static struct pci_device_id ixgb_pci_tbl[] = {
+	{INTEL_VENDOR_ID, IXGB_DEVICE_ID_82597EX,
+	 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
+	{INTEL_VENDOR_ID, IXGB_DEVICE_ID_82597EX_SR,
+	 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
+	{INTEL_VENDOR_ID, IXGB_DEVICE_ID_82597EX_LR,  
+	 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
+
+	/* required last entry */
+	{0,}
+};
+
+MODULE_DEVICE_TABLE(pci, ixgb_pci_tbl);
+
+/* Local Function Prototypes */
+
+int ixgb_up(struct ixgb_adapter *adapter);
+void ixgb_down(struct ixgb_adapter *adapter, boolean_t kill_watchdog);
+void ixgb_reset(struct ixgb_adapter *adapter);
+int ixgb_setup_tx_resources(struct ixgb_adapter *adapter);
+int ixgb_setup_rx_resources(struct ixgb_adapter *adapter);
+void ixgb_free_tx_resources(struct ixgb_adapter *adapter);
+void ixgb_free_rx_resources(struct ixgb_adapter *adapter);
+void ixgb_update_stats(struct ixgb_adapter *adapter);
+
+static int ixgb_init_module(void);
+static void ixgb_exit_module(void);
+static int ixgb_probe(struct pci_dev *pdev, const struct pci_device_id *ent);
+static void __devexit ixgb_remove(struct pci_dev *pdev);
+static int ixgb_sw_init(struct ixgb_adapter *adapter);
+static int ixgb_open(struct net_device *netdev);
+static int ixgb_close(struct net_device *netdev);
+static void ixgb_configure_tx(struct ixgb_adapter *adapter);
+static void ixgb_configure_rx(struct ixgb_adapter *adapter);
+static void ixgb_setup_rctl(struct ixgb_adapter *adapter);
+static void ixgb_clean_tx_ring(struct ixgb_adapter *adapter);
+static void ixgb_clean_rx_ring(struct ixgb_adapter *adapter);
+static void ixgb_set_multi(struct net_device *netdev);
+static void ixgb_watchdog(unsigned long data);
+static int ixgb_xmit_frame(struct sk_buff *skb, struct net_device *netdev);
+static struct net_device_stats *ixgb_get_stats(struct net_device *netdev);
+static int ixgb_change_mtu(struct net_device *netdev, int new_mtu);
+static int ixgb_set_mac(struct net_device *netdev, void *p);
+static irqreturn_t ixgb_intr(int irq, void *data, struct pt_regs *regs);
+static boolean_t ixgb_clean_tx_irq(struct ixgb_adapter *adapter);
+#ifdef CONFIG_IXGB_NAPI
+static int ixgb_clean(struct net_device *netdev, int *budget);
+static boolean_t ixgb_clean_rx_irq(struct ixgb_adapter *adapter,
+				   int *work_done, int work_to_do);
+#else
+static boolean_t ixgb_clean_rx_irq(struct ixgb_adapter *adapter);
+#endif
+static void ixgb_alloc_rx_buffers(struct ixgb_adapter *adapter);
+void ixgb_set_ethtool_ops(struct net_device *netdev);
+static void ixgb_tx_timeout(struct net_device *dev);
+static void ixgb_tx_timeout_task(struct net_device *dev);
+static void ixgb_vlan_rx_register(struct net_device *netdev,
+				  struct vlan_group *grp);
+static void ixgb_vlan_rx_add_vid(struct net_device *netdev, uint16_t vid);
+static void ixgb_vlan_rx_kill_vid(struct net_device *netdev, uint16_t vid);
+static void ixgb_restore_vlan(struct ixgb_adapter *adapter);
+
+static int ixgb_notify_reboot(struct notifier_block *, unsigned long event,
+			      void *ptr);
+static int ixgb_suspend(struct pci_dev *pdev, uint32_t state);
+
+#ifdef CONFIG_NET_POLL_CONTROLLER
+/* for netdump / net console */
+static void ixgb_netpoll(struct net_device *dev);
+#endif
+
+struct notifier_block ixgb_notifier_reboot = {
+	.notifier_call = ixgb_notify_reboot,
+	.next = NULL,
+	.priority = 0
+};
+
+/* Exported from other modules */
+
+extern void ixgb_check_options(struct ixgb_adapter *adapter);
+
+static struct pci_driver ixgb_driver = {
+	.name = ixgb_driver_name,
+	.id_table = ixgb_pci_tbl,
+	.probe = ixgb_probe,
+	.remove = __devexit_p(ixgb_remove),
+	/* Power Managment Hooks */
+	.suspend = NULL,
+	.resume = NULL
+};
+
+MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
+MODULE_DESCRIPTION("Intel(R) PRO/10GbE Network Driver");
+MODULE_LICENSE("GPL");
+
+/* some defines for controlling descriptor fetches in h/w */
+#define RXDCTL_PTHRESH_DEFAULT 128	/* chip considers prefech below this */
+#define RXDCTL_HTHRESH_DEFAULT 16	/* chip will only prefetch if tail is 
+					   pushed this many descriptors from head */
+#define RXDCTL_WTHRESH_DEFAULT 16	/* chip writes back at this many or RXT0 */
+
+/**
+ * ixgb_init_module - Driver Registration Routine
+ *
+ * ixgb_init_module is the first routine called when the driver is
+ * loaded. All it does is register with the PCI subsystem.
+ **/
+
+static int __init
+ixgb_init_module(void)
+{
+	int ret;
+	printk(KERN_INFO "%s - version %s\n",
+	       ixgb_driver_string, ixgb_driver_version);
+
+	printk(KERN_INFO "%s\n", ixgb_copyright);
+
+	ret = pci_module_init(&ixgb_driver);
+	if(ret >= 0) {
+		register_reboot_notifier(&ixgb_notifier_reboot);
+	}
+	return ret;
+}
+
+module_init(ixgb_init_module);
+
+/**
+ * ixgb_exit_module - Driver Exit Cleanup Routine
+ *
+ * ixgb_exit_module is called just before the driver is removed
+ * from memory.
+ **/
+
+static void __exit
+ixgb_exit_module(void)
+{
+	unregister_reboot_notifier(&ixgb_notifier_reboot);
+	pci_unregister_driver(&ixgb_driver);
+}
+
+module_exit(ixgb_exit_module);
+
+/**
+ * ixgb_irq_disable - Mask off interrupt generation on the NIC
+ * @adapter: board private structure
+ **/
+
+static inline void
+ixgb_irq_disable(struct ixgb_adapter *adapter)
+{
+	atomic_inc(&adapter->irq_sem);
+	IXGB_WRITE_REG(&adapter->hw, IMC, ~0);
+	IXGB_WRITE_FLUSH(&adapter->hw);
+	synchronize_irq(adapter->pdev->irq);
+}
+
+/**
+ * ixgb_irq_enable - Enable default interrupt generation settings
+ * @adapter: board private structure
+ **/
+
+static inline void
+ixgb_irq_enable(struct ixgb_adapter *adapter)
+{
+	if(atomic_dec_and_test(&adapter->irq_sem)) {
+		IXGB_WRITE_REG(&adapter->hw, IMS,
+			   IXGB_INT_RXT0 | IXGB_INT_RXDMT0 | IXGB_INT_TXDW |
+			   IXGB_INT_RXO | IXGB_INT_LSC);
+		IXGB_WRITE_FLUSH(&adapter->hw);
+	}
+}
+
+int
+ixgb_up(struct ixgb_adapter *adapter)
+{
+	struct net_device *netdev = adapter->netdev;
+	int err;
+	int max_frame = netdev->mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH;
+	struct ixgb_hw *hw = &adapter->hw;
+
+	/* hardware has been reset, we need to reload some things */
+
+	ixgb_set_multi(netdev);
+
+	ixgb_restore_vlan(adapter);
+
+	ixgb_configure_tx(adapter);
+	ixgb_setup_rctl(adapter);
+	ixgb_configure_rx(adapter);
+	ixgb_alloc_rx_buffers(adapter);
+
+#ifdef CONFIG_PCI_MSI
+	{
+	boolean_t pcix = (IXGB_READ_REG(&adapter->hw, STATUS) & 
+						  IXGB_STATUS_PCIX_MODE) ? TRUE : FALSE;
+	adapter->have_msi = TRUE;
+
+	if (!pcix)
+	   adapter->have_msi = FALSE;
+	else if((err = pci_enable_msi(adapter->pdev))) {
+		printk (KERN_ERR
+		 "Unable to allocate MSI interrupt Error: %d\n", err);
+		adapter->have_msi = FALSE;
+		/* proceed to try to request regular interrupt */
+	}
+	}
+
+#endif
+	if((err = request_irq(adapter->pdev->irq, &ixgb_intr,
+				  SA_SHIRQ | SA_SAMPLE_RANDOM,
+				  netdev->name, netdev)))
+		return err;
+
+	/* disable interrupts and get the hardware into a known state */
+	IXGB_WRITE_REG(&adapter->hw, IMC, 0xffffffff);
+
+	if((hw->max_frame_size != max_frame) ||
+		(hw->max_frame_size !=
+		(IXGB_READ_REG(hw, MFS) >> IXGB_MFS_SHIFT))) {
+
+		hw->max_frame_size = max_frame;
+
+		IXGB_WRITE_REG(hw, MFS, hw->max_frame_size << IXGB_MFS_SHIFT);
+
+		if(hw->max_frame_size >
+		   IXGB_MAX_ENET_FRAME_SIZE_WITHOUT_FCS + ENET_FCS_LENGTH) {
+			uint32_t ctrl0 = IXGB_READ_REG(hw, CTRL0);
+
+			if(!(ctrl0 & IXGB_CTRL0_JFE)) {
+				ctrl0 |= IXGB_CTRL0_JFE;
+				IXGB_WRITE_REG(hw, CTRL0, ctrl0);
+			}
+		}
+	}
+
+	mod_timer(&adapter->watchdog_timer, jiffies);
+	ixgb_irq_enable(adapter);
+
+#ifdef CONFIG_IXGB_NAPI
+	netif_poll_enable(netdev);
+#endif
+	return 0;
+}
+
+void
+ixgb_down(struct ixgb_adapter *adapter, boolean_t kill_watchdog)
+{
+	struct net_device *netdev = adapter->netdev;
+
+	ixgb_irq_disable(adapter);
+	free_irq(adapter->pdev->irq, netdev);
+#ifdef CONFIG_PCI_MSI
+	if(adapter->have_msi == TRUE)
+		pci_disable_msi(adapter->pdev);
+
+#endif
+	if(kill_watchdog)
+		del_timer_sync(&adapter->watchdog_timer);
+#ifdef CONFIG_IXGB_NAPI
+	netif_poll_disable(netdev);
+#endif
+	adapter->link_speed = 0;
+	adapter->link_duplex = 0;
+	netif_carrier_off(netdev);
+	netif_stop_queue(netdev);
+
+	ixgb_reset(adapter);
+	ixgb_clean_tx_ring(adapter);
+	ixgb_clean_rx_ring(adapter);
+}
+
+void
+ixgb_reset(struct ixgb_adapter *adapter)
+{
+
+	ixgb_adapter_stop(&adapter->hw);
+	if(!ixgb_init_hw(&adapter->hw))
+		IXGB_DBG("ixgb_init_hw failed.\n");
+}
+
+/**
+ * ixgb_probe - Device Initialization Routine
+ * @pdev: PCI device information struct
+ * @ent: entry in ixgb_pci_tbl
+ *
+ * Returns 0 on success, negative on failure
+ *
+ * ixgb_probe initializes an adapter identified by a pci_dev structure.
+ * The OS initialization, configuring of the adapter private structure,
+ * and a hardware reset occur.
+ **/
+
+static int __devinit
+ixgb_probe(struct pci_dev *pdev,
+		const struct pci_device_id *ent)
+{
+	struct net_device *netdev = NULL;
+	struct ixgb_adapter *adapter;
+	static int cards_found = 0;
+	unsigned long mmio_start;
+	int mmio_len;
+	int pci_using_dac;
+	int i;
+	int err;
+
+	if((err = pci_enable_device(pdev)))
+		return err;
+
+	if(!(err = pci_set_dma_mask(pdev, DMA_64BIT_MASK))) {
+		pci_using_dac = 1;
+	} else {
+		if((err = pci_set_dma_mask(pdev, DMA_32BIT_MASK))) {
+			IXGB_ERR("No usable DMA configuration, aborting\n");
+			return err;
+		}
+		pci_using_dac = 0;
+	}
+
+	if((err = pci_request_regions(pdev, ixgb_driver_name)))
+		return err;
+
+	pci_set_master(pdev);
+
+	netdev = alloc_etherdev(sizeof(struct ixgb_adapter));
+	if(!netdev) {
+		err = -ENOMEM;
+		goto err_alloc_etherdev;
+	}
+
+	SET_MODULE_OWNER(netdev);
+	SET_NETDEV_DEV(netdev, &pdev->dev);
+
+	pci_set_drvdata(pdev, netdev);
+	adapter = netdev->priv;
+	adapter->netdev = netdev;
+	adapter->pdev = pdev;
+	adapter->hw.back = adapter;
+
+	mmio_start = pci_resource_start(pdev, BAR_0);
+	mmio_len = pci_resource_len(pdev, BAR_0);
+
+	adapter->hw.hw_addr = ioremap(mmio_start, mmio_len);
+	if(!adapter->hw.hw_addr) {
+		err = -EIO;
+		goto err_ioremap;
+	}
+
+	for(i = BAR_1; i <= BAR_5; i++) {
+		if(pci_resource_len(pdev, i) == 0)
+			continue;
+		if(pci_resource_flags(pdev, i) & IORESOURCE_IO) {
+			adapter->hw.io_base = pci_resource_start(pdev, i);
+			break;
+		}
+	}
+
+	netdev->open = &ixgb_open;
+	netdev->stop = &ixgb_close;
+	netdev->hard_start_xmit = &ixgb_xmit_frame;
+	netdev->get_stats = &ixgb_get_stats;
+	netdev->set_multicast_list = &ixgb_set_multi;
+	netdev->set_mac_address = &ixgb_set_mac;
+	netdev->change_mtu = &ixgb_change_mtu;
+	ixgb_set_ethtool_ops(netdev);
+	netdev->tx_timeout = &ixgb_tx_timeout;
+	netdev->watchdog_timeo = HZ;
+#ifdef CONFIG_IXGB_NAPI
+	netdev->poll = &ixgb_clean;
+	netdev->weight = 64;
+#endif
+	netdev->vlan_rx_register = ixgb_vlan_rx_register;
+	netdev->vlan_rx_add_vid = ixgb_vlan_rx_add_vid;
+	netdev->vlan_rx_kill_vid = ixgb_vlan_rx_kill_vid;
+#ifdef CONFIG_NET_POLL_CONTROLLER
+	netdev->poll_controller = ixgb_netpoll;
+#endif
+
+	netdev->mem_start = mmio_start;
+	netdev->mem_end = mmio_start + mmio_len;
+	netdev->base_addr = adapter->hw.io_base;
+
+	adapter->bd_number = cards_found;
+	adapter->link_speed = 0;
+	adapter->link_duplex = 0;
+
+	/* setup the private structure */
+
+	if((err = ixgb_sw_init(adapter)))
+		goto err_sw_init;
+
+	netdev->features = NETIF_F_SG |
+			   NETIF_F_HW_CSUM |
+			   NETIF_F_HW_VLAN_TX |
+			   NETIF_F_HW_VLAN_RX |
+			   NETIF_F_HW_VLAN_FILTER;
+#ifdef NETIF_F_TSO
+	netdev->features |= NETIF_F_TSO;
+#endif
+
+	if(pci_using_dac)
+		netdev->features |= NETIF_F_HIGHDMA;
+
+	/* make sure the EEPROM is good */
+
+	if(!ixgb_validate_eeprom_checksum(&adapter->hw)) {
+		printk(KERN_ERR "The EEPROM Checksum Is Not Valid\n");
+		err = -EIO;
+		goto err_eeprom;
+	}
+
+	ixgb_get_ee_mac_addr(&adapter->hw, netdev->dev_addr);
+
+	if(!is_valid_ether_addr(netdev->dev_addr)) {
+		err = -EIO;
+		goto err_eeprom;
+	}
+
+	adapter->part_num = ixgb_get_ee_pba_number(&adapter->hw);
+
+	init_timer(&adapter->watchdog_timer);
+	adapter->watchdog_timer.function = &ixgb_watchdog;
+	adapter->watchdog_timer.data = (unsigned long)adapter;
+
+	INIT_WORK(&adapter->tx_timeout_task,
+		  (void (*)(void *))ixgb_tx_timeout_task, netdev);
+
+	if((err = register_netdev(netdev)))
+		goto err_register;
+
+	/* we're going to reset, so assume we have no link for now */
+
+	netif_carrier_off(netdev);
+	netif_stop_queue(netdev);
+
+	printk(KERN_INFO "%s: Intel(R) PRO/10GbE Network Connection\n",
+		   netdev->name);
+	ixgb_check_options(adapter);
+	/* reset the hardware with the new settings */
+
+	ixgb_reset(adapter);
+
+	cards_found++;
+	return 0;
+
+err_register:
+err_sw_init:
+err_eeprom:
+	iounmap(adapter->hw.hw_addr);
+err_ioremap:
+	free_netdev(netdev);
+err_alloc_etherdev:
+	pci_release_regions(pdev);
+	return err;
+}
+
+/**
+ * ixgb_remove - Device Removal Routine
+ * @pdev: PCI device information struct
+ *
+ * ixgb_remove is called by the PCI subsystem to alert the driver
+ * that it should release a PCI device.  The could be caused by a
+ * Hot-Plug event, or because the driver is going to be removed from
+ * memory.
+ **/
+
+static void __devexit
+ixgb_remove(struct pci_dev *pdev)
+{
+	struct net_device *netdev = pci_get_drvdata(pdev);
+	struct ixgb_adapter *adapter = netdev->priv;
+
+	unregister_netdev(netdev);
+
+	iounmap(adapter->hw.hw_addr);
+	pci_release_regions(pdev);
+
+	free_netdev(netdev);
+}
+
+/**
+ * ixgb_sw_init - Initialize general software structures (struct ixgb_adapter)
+ * @adapter: board private structure to initialize
+ *
+ * ixgb_sw_init initializes the Adapter private data structure.
+ * Fields are initialized based on PCI device information and
+ * OS network device settings (MTU size).
+ **/
+
+static int __devinit
+ixgb_sw_init(struct ixgb_adapter *adapter)
+{
+	struct ixgb_hw *hw = &adapter->hw;
+	struct net_device *netdev = adapter->netdev;
+	struct pci_dev *pdev = adapter->pdev;
+
+	/* PCI config space info */
+
+	hw->vendor_id = pdev->vendor;
+	hw->device_id = pdev->device;
+	hw->subsystem_vendor_id = pdev->subsystem_vendor;
+	hw->subsystem_id = pdev->subsystem_device;
+
+	adapter->rx_buffer_len = IXGB_RXBUFFER_2048;
+
+	hw->max_frame_size = netdev->mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH;
+
+	if((hw->device_id == IXGB_DEVICE_ID_82597EX)
+	   ||(hw->device_id == IXGB_DEVICE_ID_82597EX_LR)
+	   ||(hw->device_id == IXGB_DEVICE_ID_82597EX_SR))
+			hw->mac_type = ixgb_82597;
+	else {
+		/* should never have loaded on this device */
+		printk(KERN_ERR "ixgb: unsupported device id\n");
+	}
+
+	/* enable flow control to be programmed */
+	hw->fc.send_xon = 1;
+
+	atomic_set(&adapter->irq_sem, 1);
+	spin_lock_init(&adapter->tx_lock);
+
+	return 0;
+}
+
+/**
+ * ixgb_open - Called when a network interface is made active
+ * @netdev: network interface device structure
+ *
+ * Returns 0 on success, negative value on failure
+ *
+ * The open entry point is called when a network interface is made
+ * active by the system (IFF_UP).  At this point all resources needed
+ * for transmit and receive operations are allocated, the interrupt
+ * handler is registered with the OS, the watchdog timer is started,
+ * and the stack is notified that the interface is ready.
+ **/
+
+static int
+ixgb_open(struct net_device *netdev)
+{
+	struct ixgb_adapter *adapter = netdev->priv;
+	int err;
+
+	/* allocate transmit descriptors */
+
+	if((err = ixgb_setup_tx_resources(adapter)))
+		goto err_setup_tx;
+
+	/* allocate receive descriptors */
+
+	if((err = ixgb_setup_rx_resources(adapter)))
+		goto err_setup_rx;
+
+	if((err = ixgb_up(adapter)))
+		goto err_up;
+
+	return 0;
+
+err_up:
+	ixgb_free_rx_resources(adapter);
+err_setup_rx:
+	ixgb_free_tx_resources(adapter);
+err_setup_tx:
+	ixgb_reset(adapter);
+
+	return err;
+}
+
+/**
+ * ixgb_close - Disables a network interface
+ * @netdev: network interface device structure
+ *
+ * Returns 0, this is not allowed to fail
+ *
+ * The close entry point is called when an interface is de-activated
+ * by the OS.  The hardware is still under the drivers control, but
+ * needs to be disabled.  A global MAC reset is issued to stop the
+ * hardware, and all transmit and receive resources are freed.
+ **/
+
+static int
+ixgb_close(struct net_device *netdev)
+{
+	struct ixgb_adapter *adapter = netdev->priv;
+
+	ixgb_down(adapter, TRUE);
+
+	ixgb_free_tx_resources(adapter);
+	ixgb_free_rx_resources(adapter);
+
+	return 0;
+}
+
+/**
+ * ixgb_setup_tx_resources - allocate Tx resources (Descriptors)
+ * @adapter: board private structure
+ *
+ * Return 0 on success, negative on failure
+ **/
+
+int
+ixgb_setup_tx_resources(struct ixgb_adapter *adapter)
+{
+	struct ixgb_desc_ring *txdr = &adapter->tx_ring;
+	struct pci_dev *pdev = adapter->pdev;
+	int size;
+
+	size = sizeof(struct ixgb_buffer) * txdr->count;
+	txdr->buffer_info = vmalloc(size);
+	if(!txdr->buffer_info) {
+		return -ENOMEM;
+	}
+	memset(txdr->buffer_info, 0, size);
+
+	/* round up to nearest 4K */
+
+	txdr->size = txdr->count * sizeof(struct ixgb_tx_desc);
+	IXGB_ROUNDUP(txdr->size, 4096);
+
+	txdr->desc = pci_alloc_consistent(pdev, txdr->size, &txdr->dma);
+	if(!txdr->desc) {
+		vfree(txdr->buffer_info);
+		return -ENOMEM;
+	}
+	memset(txdr->desc, 0, txdr->size);
+
+	txdr->next_to_use = 0;
+	txdr->next_to_clean = 0;
+
+	return 0;
+}
+
+/**
+ * ixgb_configure_tx - Configure 82597 Transmit Unit after Reset.
+ * @adapter: board private structure
+ *
+ * Configure the Tx unit of the MAC after a reset.
+ **/
+
+static void
+ixgb_configure_tx(struct ixgb_adapter *adapter)
+{
+	uint64_t tdba = adapter->tx_ring.dma;
+	uint32_t tdlen = adapter->tx_ring.count * sizeof(struct ixgb_tx_desc);
+	uint32_t tctl;
+	struct ixgb_hw *hw = &adapter->hw;
+
+	/* Setup the Base and Length of the Tx Descriptor Ring 
+	 * tx_ring.dma can be either a 32 or 64 bit value 
+	 */
+
+	IXGB_WRITE_REG(hw, TDBAL, (tdba & 0x00000000ffffffffULL));
+	IXGB_WRITE_REG(hw, TDBAH, (tdba >> 32));
+
+	IXGB_WRITE_REG(hw, TDLEN, tdlen);
+
+	/* Setup the HW Tx Head and Tail descriptor pointers */
+
+	IXGB_WRITE_REG(hw, TDH, 0);
+	IXGB_WRITE_REG(hw, TDT, 0);
+
+	/* don't set up txdctl, it induces performance problems if configured
+	 * incorrectly */
+	/* Set the Tx Interrupt Delay register */
+
+	IXGB_WRITE_REG(hw, TIDV, adapter->tx_int_delay);
+
+	/* Program the Transmit Control Register */
+
+	tctl = IXGB_TCTL_TCE | IXGB_TCTL_TXEN | IXGB_TCTL_TPDE;
+	IXGB_WRITE_REG(hw, TCTL, tctl);
+
+	/* Setup Transmit Descriptor Settings for this adapter */
+	adapter->tx_cmd_type =
+		IXGB_TX_DESC_TYPE 
+		| (adapter->tx_int_delay_enable ? IXGB_TX_DESC_CMD_IDE : 0);
+}
+
+/**
+ * ixgb_setup_rx_resources - allocate Rx resources (Descriptors)
+ * @adapter: board private structure
+ *
+ * Returns 0 on success, negative on failure
+ **/
+
+int
+ixgb_setup_rx_resources(struct ixgb_adapter *adapter)
+{
+	struct ixgb_desc_ring *rxdr = &adapter->rx_ring;
+	struct pci_dev *pdev = adapter->pdev;
+	int size;
+
+	size = sizeof(struct ixgb_buffer) * rxdr->count;
+	rxdr->buffer_info = vmalloc(size);
+	if(!rxdr->buffer_info) {
+		return -ENOMEM;
+	}
+	memset(rxdr->buffer_info, 0, size);
+
+	/* Round up to nearest 4K */
+
+	rxdr->size = rxdr->count * sizeof(struct ixgb_rx_desc);
+	IXGB_ROUNDUP(rxdr->size, 4096);
+
+	rxdr->desc = pci_alloc_consistent(pdev, rxdr->size, &rxdr->dma);
+
+	if(!rxdr->desc) {
+		vfree(rxdr->buffer_info);
+		return -ENOMEM;
+	}
+	memset(rxdr->desc, 0, rxdr->size);
+
+	rxdr->next_to_clean = 0;
+	rxdr->next_to_use = 0;
+
+	return 0;
+}
+
+/**
+ * ixgb_setup_rctl - configure the receive control register
+ * @adapter: Board private structure
+ **/
+
+static void
+ixgb_setup_rctl(struct ixgb_adapter *adapter)
+{
+	uint32_t rctl;
+
+	rctl = IXGB_READ_REG(&adapter->hw, RCTL);
+
+	rctl &= ~(3 << IXGB_RCTL_MO_SHIFT);
+
+	rctl |=
+		IXGB_RCTL_BAM | IXGB_RCTL_RDMTS_1_2 | 
+		IXGB_RCTL_RXEN | IXGB_RCTL_CFF | 
+		(adapter->hw.mc_filter_type << IXGB_RCTL_MO_SHIFT);
+
+	rctl |= IXGB_RCTL_SECRC;
+
+	switch (adapter->rx_buffer_len) {
+	case IXGB_RXBUFFER_2048:
+	default:
+		rctl |= IXGB_RCTL_BSIZE_2048;
+		break;
+	case IXGB_RXBUFFER_4096:
+		rctl |= IXGB_RCTL_BSIZE_4096;
+		break;
+	case IXGB_RXBUFFER_8192:
+		rctl |= IXGB_RCTL_BSIZE_8192;
+		break;
+	case IXGB_RXBUFFER_16384:
+		rctl |= IXGB_RCTL_BSIZE_16384;
+		break;
+	}
+
+	IXGB_WRITE_REG(&adapter->hw, RCTL, rctl);
+}
+
+/**
+ * ixgb_configure_rx - Configure 82597 Receive Unit after Reset.
+ * @adapter: board private structure
+ *
+ * Configure the Rx unit of the MAC after a reset.
+ **/
+
+static void
+ixgb_configure_rx(struct ixgb_adapter *adapter)
+{
+	uint64_t rdba = adapter->rx_ring.dma;
+	uint32_t rdlen = adapter->rx_ring.count * sizeof(struct ixgb_rx_desc);
+	struct ixgb_hw *hw = &adapter->hw;
+	uint32_t rctl;
+	uint32_t rxcsum;
+	uint32_t rxdctl;
+
+	/* make sure receives are disabled while setting up the descriptors */
+
+	rctl = IXGB_READ_REG(hw, RCTL);
+	IXGB_WRITE_REG(hw, RCTL, rctl & ~IXGB_RCTL_RXEN);
+
+	/* set the Receive Delay Timer Register */
+
+	IXGB_WRITE_REG(hw, RDTR, adapter->rx_int_delay);
+
+	/* Setup the Base and Length of the Rx Descriptor Ring */
+
+	IXGB_WRITE_REG(hw, RDBAL, (rdba & 0x00000000ffffffffULL));
+	IXGB_WRITE_REG(hw, RDBAH, (rdba >> 32));
+
+	IXGB_WRITE_REG(hw, RDLEN, rdlen);
+
+	/* Setup the HW Rx Head and Tail Descriptor Pointers */
+	IXGB_WRITE_REG(hw, RDH, 0);
+	IXGB_WRITE_REG(hw, RDT, 0);
+
+	/* set up pre-fetching of receive buffers so we get some before we
+	 * run out (default hardware behavior is to run out before fetching
+	 * more).  This sets up to fetch if HTHRESH rx descriptors are avail
+	 * and the descriptors in hw cache are below PTHRESH.  This avoids
+	 * the hardware behavior of fetching <=512 descriptors in a single
+	 * burst that pre-empts all other activity, usually causing fifo
+	 * overflows. */
+	/* use WTHRESH to burst write 16 descriptors or burst when RXT0 */
+	rxdctl = RXDCTL_WTHRESH_DEFAULT << IXGB_RXDCTL_WTHRESH_SHIFT |
+	         RXDCTL_HTHRESH_DEFAULT << IXGB_RXDCTL_HTHRESH_SHIFT |
+	         RXDCTL_PTHRESH_DEFAULT << IXGB_RXDCTL_PTHRESH_SHIFT;
+	IXGB_WRITE_REG(hw, RXDCTL, rxdctl);
+
+	/* Enable Receive Checksum Offload for TCP and UDP */
+	if(adapter->rx_csum == TRUE) {
+		rxcsum = IXGB_READ_REG(hw, RXCSUM);
+		rxcsum |= IXGB_RXCSUM_TUOFL;
+		IXGB_WRITE_REG(hw, RXCSUM, rxcsum);
+	}
+
+	/* Enable Receives */
+
+	IXGB_WRITE_REG(hw, RCTL, rctl);
+}
+
+/**
+ * ixgb_free_tx_resources - Free Tx Resources
+ * @adapter: board private structure
+ *
+ * Free all transmit software resources
+ **/
+
+void
+ixgb_free_tx_resources(struct ixgb_adapter *adapter)
+{
+	struct pci_dev *pdev = adapter->pdev;
+
+	ixgb_clean_tx_ring(adapter);
+
+	vfree(adapter->tx_ring.buffer_info);
+	adapter->tx_ring.buffer_info = NULL;
+
+	pci_free_consistent(pdev, adapter->tx_ring.size,
+			    adapter->tx_ring.desc, adapter->tx_ring.dma);
+
+	adapter->tx_ring.desc = NULL;
+}
+
+static inline void
+ixgb_unmap_and_free_tx_resource(struct ixgb_adapter *adapter,
+					struct ixgb_buffer *buffer_info)
+{
+	struct pci_dev *pdev = adapter->pdev;
+	if(buffer_info->dma) {
+		pci_unmap_page(pdev,
+			   buffer_info->dma,
+			   buffer_info->length,
+			   PCI_DMA_TODEVICE);
+		buffer_info->dma = 0;
+	}
+	if(buffer_info->skb) {
+		dev_kfree_skb_any(buffer_info->skb);
+		buffer_info->skb = NULL;
+	}
+}
+
+/**
+ * ixgb_clean_tx_ring - Free Tx Buffers
+ * @adapter: board private structure
+ **/
+
+static void
+ixgb_clean_tx_ring(struct ixgb_adapter *adapter)
+{
+	struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
+	struct ixgb_buffer *buffer_info;
+	unsigned long size;
+	unsigned int i;
+
+	/* Free all the Tx ring sk_buffs */
+
+	for(i = 0; i < tx_ring->count; i++) {
+		buffer_info = &tx_ring->buffer_info[i];
+		ixgb_unmap_and_free_tx_resource(adapter, buffer_info);
+	}
+
+	size = sizeof(struct ixgb_buffer) * tx_ring->count;
+	memset(tx_ring->buffer_info, 0, size);
+
+	/* Zero out the descriptor ring */
+
+	memset(tx_ring->desc, 0, tx_ring->size);
+
+	tx_ring->next_to_use = 0;
+	tx_ring->next_to_clean = 0;
+
+	IXGB_WRITE_REG(&adapter->hw, TDH, 0);
+	IXGB_WRITE_REG(&adapter->hw, TDT, 0);
+}
+
+/**
+ * ixgb_free_rx_resources - Free Rx Resources
+ * @adapter: board private structure
+ *
+ * Free all receive software resources
+ **/
+
+void
+ixgb_free_rx_resources(struct ixgb_adapter *adapter)
+{
+	struct ixgb_desc_ring *rx_ring = &adapter->rx_ring;
+	struct pci_dev *pdev = adapter->pdev;
+
+	ixgb_clean_rx_ring(adapter);
+
+	vfree(rx_ring->buffer_info);
+	rx_ring->buffer_info = NULL;
+
+	pci_free_consistent(pdev, rx_ring->size, rx_ring->desc, rx_ring->dma);
+
+	rx_ring->desc = NULL;
+}
+
+/**
+ * ixgb_clean_rx_ring - Free Rx Buffers
+ * @adapter: board private structure
+ **/
+
+static void
+ixgb_clean_rx_ring(struct ixgb_adapter *adapter)
+{
+	struct ixgb_desc_ring *rx_ring = &adapter->rx_ring;
+	struct ixgb_buffer *buffer_info;
+	struct pci_dev *pdev = adapter->pdev;
+	unsigned long size;
+	unsigned int i;
+
+	/* Free all the Rx ring sk_buffs */
+
+	for(i = 0; i < rx_ring->count; i++) {
+		buffer_info = &rx_ring->buffer_info[i];
+		if(buffer_info->skb) {
+
+			pci_unmap_single(pdev,
+					 buffer_info->dma,
+					 buffer_info->length,
+					 PCI_DMA_FROMDEVICE);
+
+			dev_kfree_skb(buffer_info->skb);
+
+			buffer_info->skb = NULL;
+		}
+	}
+
+	size = sizeof(struct ixgb_buffer) * rx_ring->count;
+	memset(rx_ring->buffer_info, 0, size);
+
+	/* Zero out the descriptor ring */
+
+	memset(rx_ring->desc, 0, rx_ring->size);
+
+	rx_ring->next_to_clean = 0;
+	rx_ring->next_to_use = 0;
+
+	IXGB_WRITE_REG(&adapter->hw, RDH, 0);
+	IXGB_WRITE_REG(&adapter->hw, RDT, 0);
+}
+
+/**
+ * ixgb_set_mac - Change the Ethernet Address of the NIC
+ * @netdev: network interface device structure
+ * @p: pointer to an address structure
+ *
+ * Returns 0 on success, negative on failure
+ **/
+
+static int
+ixgb_set_mac(struct net_device *netdev, void *p)
+{
+	struct ixgb_adapter *adapter = netdev->priv;
+	struct sockaddr *addr = p;
+
+	if(!is_valid_ether_addr(addr->sa_data))
+		return -EADDRNOTAVAIL;
+
+	memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
+
+	ixgb_rar_set(&adapter->hw, addr->sa_data, 0);
+
+	return 0;
+}
+
+/**
+ * ixgb_set_multi - Multicast and Promiscuous mode set
+ * @netdev: network interface device structure
+ *
+ * The set_multi entry point is called whenever the multicast address
+ * list or the network interface flags are updated.  This routine is
+ * responsible for configuring the hardware for proper multicast,
+ * promiscuous mode, and all-multi behavior.
+ **/
+
+static void
+ixgb_set_multi(struct net_device *netdev)
+{
+	struct ixgb_adapter *adapter = netdev->priv;
+	struct ixgb_hw *hw = &adapter->hw;
+	struct dev_mc_list *mc_ptr;
+	uint32_t rctl;
+	int i;
+
+	/* Check for Promiscuous and All Multicast modes */
+
+	rctl = IXGB_READ_REG(hw, RCTL);
+
+	if(netdev->flags & IFF_PROMISC) {
+		rctl |= (IXGB_RCTL_UPE | IXGB_RCTL_MPE);
+	} else if(netdev->flags & IFF_ALLMULTI) {
+		rctl |= IXGB_RCTL_MPE;
+		rctl &= ~IXGB_RCTL_UPE;
+	} else {
+		rctl &= ~(IXGB_RCTL_UPE | IXGB_RCTL_MPE);
+	}
+
+	if(netdev->mc_count > IXGB_MAX_NUM_MULTICAST_ADDRESSES) {
+		rctl |= IXGB_RCTL_MPE;
+		IXGB_WRITE_REG(hw, RCTL, rctl);
+	} else {
+		uint8_t mta[netdev->mc_count * IXGB_ETH_LENGTH_OF_ADDRESS];
+
+		IXGB_WRITE_REG(hw, RCTL, rctl);
+
+		for(i = 0, mc_ptr = netdev->mc_list; mc_ptr;
+			i++, mc_ptr = mc_ptr->next)
+			memcpy(&mta[i * IXGB_ETH_LENGTH_OF_ADDRESS],
+				   mc_ptr->dmi_addr, IXGB_ETH_LENGTH_OF_ADDRESS);
+
+		ixgb_mc_addr_list_update(hw, mta, netdev->mc_count, 0);
+	}
+}
+
+/**
+ * ixgb_watchdog - Timer Call-back
+ * @data: pointer to netdev cast into an unsigned long
+ **/
+
+static void
+ixgb_watchdog(unsigned long data)
+{
+	struct ixgb_adapter *adapter = (struct ixgb_adapter *)data;
+	struct net_device *netdev = adapter->netdev;
+	struct ixgb_desc_ring *txdr = &adapter->tx_ring;
+
+	ixgb_check_for_link(&adapter->hw);
+
+	if (ixgb_check_for_bad_link(&adapter->hw)) {
+		/* force the reset path */
+		netif_stop_queue(netdev);
+	}
+
+	if(adapter->hw.link_up) {
+		if(!netif_carrier_ok(netdev)) {
+			printk(KERN_INFO "ixgb: %s NIC Link is Up %d Mbps %s\n",
+				   netdev->name, 10000, "Full Duplex");
+			adapter->link_speed = 10000;
+			adapter->link_duplex = FULL_DUPLEX;
+			netif_carrier_on(netdev);
+			netif_wake_queue(netdev);
+		}
+	} else {
+		if(netif_carrier_ok(netdev)) {
+			adapter->link_speed = 0;
+			adapter->link_duplex = 0;
+			printk(KERN_INFO
+				   "ixgb: %s NIC Link is Down\n",
+				   netdev->name);
+			netif_carrier_off(netdev);
+			netif_stop_queue(netdev);
+
+		}
+	}
+
+	ixgb_update_stats(adapter);
+
+	if(!netif_carrier_ok(netdev)) {
+		if(IXGB_DESC_UNUSED(txdr) + 1 < txdr->count) {
+			/* We've lost link, so the controller stops DMA,
+			 * but we've got queued Tx work that's never going
+			 * to get done, so reset controller to flush Tx.
+			 * (Do the reset outside of interrupt context). */
+			schedule_work(&adapter->tx_timeout_task);
+		}
+	}
+
+	/* Force detection of hung controller every watchdog period */
+	adapter->detect_tx_hung = TRUE;
+
+	/* generate an interrupt to force clean up of any stragglers */
+	IXGB_WRITE_REG(&adapter->hw, ICS, IXGB_INT_TXDW);
+
+	/* Reset the timer */
+	mod_timer(&adapter->watchdog_timer, jiffies + 2 * HZ);
+}
+
+#define IXGB_TX_FLAGS_CSUM		0x00000001
+#define IXGB_TX_FLAGS_VLAN		0x00000002
+#define IXGB_TX_FLAGS_TSO		0x00000004
+
+static inline int
+ixgb_tso(struct ixgb_adapter *adapter, struct sk_buff *skb)
+{
+#ifdef NETIF_F_TSO
+	struct ixgb_context_desc *context_desc;
+	unsigned int i;
+	uint8_t ipcss, ipcso, tucss, tucso, hdr_len;
+	uint16_t ipcse, tucse, mss;
+	int err;
+
+	if(likely(skb_shinfo(skb)->tso_size)) {
+		if (skb_header_cloned(skb)) {
+			err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
+			if (err)
+				return err;
+		}
+
+		hdr_len = ((skb->h.raw - skb->data) + (skb->h.th->doff << 2));
+		mss = skb_shinfo(skb)->tso_size;
+		skb->nh.iph->tot_len = 0;
+		skb->nh.iph->check = 0;
+		skb->h.th->check = ~csum_tcpudp_magic(skb->nh.iph->saddr,
+						      skb->nh.iph->daddr,
+						      0, IPPROTO_TCP, 0);
+		ipcss = skb->nh.raw - skb->data;
+		ipcso = (void *)&(skb->nh.iph->check) - (void *)skb->data;
+		ipcse = skb->h.raw - skb->data - 1;
+		tucss = skb->h.raw - skb->data;
+		tucso = (void *)&(skb->h.th->check) - (void *)skb->data;
+		tucse = 0;
+
+		i = adapter->tx_ring.next_to_use;
+		context_desc = IXGB_CONTEXT_DESC(adapter->tx_ring, i);
+
+		context_desc->ipcss = ipcss;
+		context_desc->ipcso = ipcso;
+		context_desc->ipcse = cpu_to_le16(ipcse);
+		context_desc->tucss = tucss;
+		context_desc->tucso = tucso;
+		context_desc->tucse = cpu_to_le16(tucse);
+		context_desc->mss = cpu_to_le16(mss);
+		context_desc->hdr_len = hdr_len;
+		context_desc->status = 0;
+		context_desc->cmd_type_len = cpu_to_le32(
+						  IXGB_CONTEXT_DESC_TYPE 
+						| IXGB_CONTEXT_DESC_CMD_TSE
+						| IXGB_CONTEXT_DESC_CMD_IP
+						| IXGB_CONTEXT_DESC_CMD_TCP
+						| IXGB_CONTEXT_DESC_CMD_RS
+						| IXGB_CONTEXT_DESC_CMD_IDE
+						| (skb->len - (hdr_len)));
+
+		if(++i == adapter->tx_ring.count) i = 0;
+		adapter->tx_ring.next_to_use = i;
+
+		return 1;
+	}
+#endif
+
+	return 0;
+}
+
+static inline boolean_t
+ixgb_tx_csum(struct ixgb_adapter *adapter, struct sk_buff *skb)
+{
+	struct ixgb_context_desc *context_desc;
+	unsigned int i;
+	uint8_t css, cso;
+
+	if(likely(skb->ip_summed == CHECKSUM_HW)) {
+		css = skb->h.raw - skb->data;
+		cso = (skb->h.raw + skb->csum) - skb->data;
+
+		i = adapter->tx_ring.next_to_use;
+		context_desc = IXGB_CONTEXT_DESC(adapter->tx_ring, i);
+
+		context_desc->tucss = css;
+		context_desc->tucso = cso;
+		context_desc->tucse = 0;
+		/* zero out any previously existing data in one instruction */
+		*(uint32_t *)&(context_desc->ipcss) = 0;
+		context_desc->status = 0;
+		context_desc->hdr_len = 0;
+		context_desc->mss = 0;
+		context_desc->cmd_type_len =
+			cpu_to_le32(IXGB_CONTEXT_DESC_TYPE
+					| IXGB_TX_DESC_CMD_RS 
+					| IXGB_TX_DESC_CMD_IDE);
+
+		if(++i == adapter->tx_ring.count) i = 0;
+		adapter->tx_ring.next_to_use = i;
+
+		return TRUE;
+	}
+
+	return FALSE;
+}
+
+#define IXGB_MAX_TXD_PWR	14
+#define IXGB_MAX_DATA_PER_TXD	(1<<IXGB_MAX_TXD_PWR)
+
+static inline int
+ixgb_tx_map(struct ixgb_adapter *adapter, struct sk_buff *skb,
+	    unsigned int first)
+{
+	struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
+	struct ixgb_buffer *buffer_info;
+	int len = skb->len;
+	unsigned int offset = 0, size, count = 0, i;
+
+	unsigned int nr_frags = skb_shinfo(skb)->nr_frags;
+	unsigned int f;
+	len -= skb->data_len;
+
+	i = tx_ring->next_to_use;
+
+	while(len) {
+		buffer_info = &tx_ring->buffer_info[i];
+		size = min(len, IXGB_MAX_JUMBO_FRAME_SIZE);
+		buffer_info->length = size;
+		buffer_info->dma =
+			pci_map_single(adapter->pdev,
+				skb->data + offset,
+				size,
+				PCI_DMA_TODEVICE);
+		buffer_info->time_stamp = jiffies;
+
+		len -= size;
+		offset += size;
+		count++;
+		if(++i == tx_ring->count) i = 0;
+	}
+
+	for(f = 0; f < nr_frags; f++) {
+		struct skb_frag_struct *frag;
+
+		frag = &skb_shinfo(skb)->frags[f];
+		len = frag->size;
+		offset = 0;
+
+		while(len) {
+			buffer_info = &tx_ring->buffer_info[i];
+			size = min(len, IXGB_MAX_JUMBO_FRAME_SIZE);
+			buffer_info->length = size;
+			buffer_info->dma =
+				pci_map_page(adapter->pdev,
+					frag->page,
+					frag->page_offset + offset,
+					size,
+					PCI_DMA_TODEVICE);
+			buffer_info->time_stamp = jiffies;
+
+			len -= size;
+			offset += size;
+			count++;
+			if(++i == tx_ring->count) i = 0;
+		}
+	}
+	i = (i == 0) ? tx_ring->count - 1 : i - 1;
+	tx_ring->buffer_info[i].skb = skb;
+	tx_ring->buffer_info[first].next_to_watch = i;
+
+	return count;
+}
+
+static inline void
+ixgb_tx_queue(struct ixgb_adapter *adapter, int count, int vlan_id,int tx_flags)
+{
+	struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
+	struct ixgb_tx_desc *tx_desc = NULL;
+	struct ixgb_buffer *buffer_info;
+	uint32_t cmd_type_len = adapter->tx_cmd_type;
+	uint8_t status = 0;
+	uint8_t popts = 0;
+	unsigned int i;
+
+	if(tx_flags & IXGB_TX_FLAGS_TSO) {
+		cmd_type_len |= IXGB_TX_DESC_CMD_TSE;
+		popts |= (IXGB_TX_DESC_POPTS_IXSM | IXGB_TX_DESC_POPTS_TXSM);
+	}
+
+	if(tx_flags & IXGB_TX_FLAGS_CSUM)
+		popts |= IXGB_TX_DESC_POPTS_TXSM;
+
+	if(tx_flags & IXGB_TX_FLAGS_VLAN) {
+		cmd_type_len |= IXGB_TX_DESC_CMD_VLE;
+	}
+
+	i = tx_ring->next_to_use;
+
+	while(count--) {
+		buffer_info = &tx_ring->buffer_info[i];
+		tx_desc = IXGB_TX_DESC(*tx_ring, i);
+		tx_desc->buff_addr = cpu_to_le64(buffer_info->dma);
+		tx_desc->cmd_type_len =
+			cpu_to_le32(cmd_type_len | buffer_info->length);
+		tx_desc->status = status;
+		tx_desc->popts = popts;
+		tx_desc->vlan = cpu_to_le16(vlan_id);
+
+		if(++i == tx_ring->count) i = 0;
+	}
+
+	tx_desc->cmd_type_len |= cpu_to_le32(IXGB_TX_DESC_CMD_EOP 
+				| IXGB_TX_DESC_CMD_RS );
+
+	/* Force memory writes to complete before letting h/w
+	 * know there are new descriptors to fetch.  (Only
+	 * applicable for weak-ordered memory model archs,
+	 * such as IA-64). */
+	wmb();
+
+	tx_ring->next_to_use = i;
+	IXGB_WRITE_REG(&adapter->hw, TDT, i);
+}
+
+/* Tx Descriptors needed, worst case */
+#define TXD_USE_COUNT(S) (((S) >> IXGB_MAX_TXD_PWR) + \
+			 (((S) & (IXGB_MAX_DATA_PER_TXD - 1)) ? 1 : 0))
+#define DESC_NEEDED TXD_USE_COUNT(IXGB_MAX_DATA_PER_TXD) + \
+	MAX_SKB_FRAGS * TXD_USE_COUNT(PAGE_SIZE) + 1
+
+static int
+ixgb_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
+{
+	struct ixgb_adapter *adapter = netdev->priv;
+	unsigned int first;
+	unsigned int tx_flags = 0;
+	unsigned long flags;
+	int vlan_id = 0;
+	int tso;
+
+	if(skb->len <= 0) {
+		dev_kfree_skb_any(skb);
+		return 0;
+	}
+
+	spin_lock_irqsave(&adapter->tx_lock, flags);
+	if(unlikely(IXGB_DESC_UNUSED(&adapter->tx_ring) < DESC_NEEDED)) {
+		netif_stop_queue(netdev);
+		spin_unlock_irqrestore(&adapter->tx_lock, flags);
+		return 1;
+	}
+	spin_unlock_irqrestore(&adapter->tx_lock, flags);
+
+	if(adapter->vlgrp && vlan_tx_tag_present(skb)) {
+		tx_flags |= IXGB_TX_FLAGS_VLAN;
+		vlan_id = vlan_tx_tag_get(skb);
+	}
+
+	first = adapter->tx_ring.next_to_use;
+	
+	tso = ixgb_tso(adapter, skb);
+	if (tso < 0) {
+		dev_kfree_skb_any(skb);
+		return NETDEV_TX_OK;
+	}
+
+	if (tso)
+		tx_flags |= IXGB_TX_FLAGS_TSO;
+	else if(ixgb_tx_csum(adapter, skb))
+		tx_flags |= IXGB_TX_FLAGS_CSUM;
+
+	ixgb_tx_queue(adapter, ixgb_tx_map(adapter, skb, first), vlan_id,
+			tx_flags);
+
+	netdev->trans_start = jiffies;
+
+	return 0;
+}
+
+/**
+ * ixgb_tx_timeout - Respond to a Tx Hang
+ * @netdev: network interface device structure
+ **/
+
+static void
+ixgb_tx_timeout(struct net_device *netdev)
+{
+	struct ixgb_adapter *adapter = netdev->priv;
+
+	/* Do the reset outside of interrupt context */
+	schedule_work(&adapter->tx_timeout_task);
+}
+
+static void
+ixgb_tx_timeout_task(struct net_device *netdev)
+{
+	struct ixgb_adapter *adapter = netdev->priv;
+
+	ixgb_down(adapter, TRUE);
+	ixgb_up(adapter);
+}
+
+/**
+ * ixgb_get_stats - Get System Network Statistics
+ * @netdev: network interface device structure
+ *
+ * Returns the address of the device statistics structure.
+ * The statistics are actually updated from the timer callback.
+ **/
+
+static struct net_device_stats *
+ixgb_get_stats(struct net_device *netdev)
+{
+	struct ixgb_adapter *adapter = netdev->priv;
+
+	return &adapter->net_stats;
+}
+
+/**
+ * ixgb_change_mtu - Change the Maximum Transfer Unit
+ * @netdev: network interface device structure
+ * @new_mtu: new value for maximum frame size
+ *
+ * Returns 0 on success, negative on failure
+ **/
+
+static int
+ixgb_change_mtu(struct net_device *netdev, int new_mtu)
+{
+	struct ixgb_adapter *adapter = netdev->priv;
+	int max_frame = new_mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH;
+	int old_max_frame = netdev->mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH;
+
+
+	if((max_frame < IXGB_MIN_ENET_FRAME_SIZE_WITHOUT_FCS + ENET_FCS_LENGTH)
+	   || (max_frame > IXGB_MAX_JUMBO_FRAME_SIZE + ENET_FCS_LENGTH)) {
+		IXGB_ERR("Invalid MTU setting\n");
+		return -EINVAL;
+	}
+
+	if((max_frame <= IXGB_MAX_ENET_FRAME_SIZE_WITHOUT_FCS + ENET_FCS_LENGTH)
+	   || (max_frame <= IXGB_RXBUFFER_2048)) {
+		adapter->rx_buffer_len = IXGB_RXBUFFER_2048;
+
+	} else if(max_frame <= IXGB_RXBUFFER_4096) {
+		adapter->rx_buffer_len = IXGB_RXBUFFER_4096;
+
+	} else if(max_frame <= IXGB_RXBUFFER_8192) {
+		adapter->rx_buffer_len = IXGB_RXBUFFER_8192;
+
+	} else {
+		adapter->rx_buffer_len = IXGB_RXBUFFER_16384;
+	}
+
+	netdev->mtu = new_mtu;
+
+	if(old_max_frame != max_frame && netif_running(netdev)) {
+
+		ixgb_down(adapter, TRUE);
+		ixgb_up(adapter);
+	}
+
+	return 0;
+}
+
+/**
+ * ixgb_update_stats - Update the board statistics counters.
+ * @adapter: board private structure
+ **/
+
+void
+ixgb_update_stats(struct ixgb_adapter *adapter)
+{
+	adapter->stats.tprl += IXGB_READ_REG(&adapter->hw, TPRL);
+	adapter->stats.tprh += IXGB_READ_REG(&adapter->hw, TPRH);
+	adapter->stats.gprcl += IXGB_READ_REG(&adapter->hw, GPRCL);
+	adapter->stats.gprch += IXGB_READ_REG(&adapter->hw, GPRCH);
+	adapter->stats.bprcl += IXGB_READ_REG(&adapter->hw, BPRCL);
+	adapter->stats.bprch += IXGB_READ_REG(&adapter->hw, BPRCH);
+	adapter->stats.mprcl += IXGB_READ_REG(&adapter->hw, MPRCL);
+	adapter->stats.mprch += IXGB_READ_REG(&adapter->hw, MPRCH);
+	adapter->stats.uprcl += IXGB_READ_REG(&adapter->hw, UPRCL);
+	adapter->stats.uprch += IXGB_READ_REG(&adapter->hw, UPRCH);
+	adapter->stats.vprcl += IXGB_READ_REG(&adapter->hw, VPRCL);
+	adapter->stats.vprch += IXGB_READ_REG(&adapter->hw, VPRCH);
+	adapter->stats.jprcl += IXGB_READ_REG(&adapter->hw, JPRCL);
+	adapter->stats.jprch += IXGB_READ_REG(&adapter->hw, JPRCH);
+	adapter->stats.gorcl += IXGB_READ_REG(&adapter->hw, GORCL);
+	adapter->stats.gorch += IXGB_READ_REG(&adapter->hw, GORCH);
+	adapter->stats.torl += IXGB_READ_REG(&adapter->hw, TORL);
+	adapter->stats.torh += IXGB_READ_REG(&adapter->hw, TORH);
+	adapter->stats.rnbc += IXGB_READ_REG(&adapter->hw, RNBC);
+	adapter->stats.ruc += IXGB_READ_REG(&adapter->hw, RUC);
+	adapter->stats.roc += IXGB_READ_REG(&adapter->hw, ROC);
+	adapter->stats.rlec += IXGB_READ_REG(&adapter->hw, RLEC);
+	adapter->stats.crcerrs += IXGB_READ_REG(&adapter->hw, CRCERRS);
+	adapter->stats.icbc += IXGB_READ_REG(&adapter->hw, ICBC);
+	adapter->stats.ecbc += IXGB_READ_REG(&adapter->hw, ECBC);
+	adapter->stats.mpc += IXGB_READ_REG(&adapter->hw, MPC);
+	adapter->stats.tptl += IXGB_READ_REG(&adapter->hw, TPTL);
+	adapter->stats.tpth += IXGB_READ_REG(&adapter->hw, TPTH);
+	adapter->stats.gptcl += IXGB_READ_REG(&adapter->hw, GPTCL);
+	adapter->stats.gptch += IXGB_READ_REG(&adapter->hw, GPTCH);
+	adapter->stats.bptcl += IXGB_READ_REG(&adapter->hw, BPTCL);
+	adapter->stats.bptch += IXGB_READ_REG(&adapter->hw, BPTCH);
+	adapter->stats.mptcl += IXGB_READ_REG(&adapter->hw, MPTCL);
+	adapter->stats.mptch += IXGB_READ_REG(&adapter->hw, MPTCH);
+	adapter->stats.uptcl += IXGB_READ_REG(&adapter->hw, UPTCL);
+	adapter->stats.uptch += IXGB_READ_REG(&adapter->hw, UPTCH);
+	adapter->stats.vptcl += IXGB_READ_REG(&adapter->hw, VPTCL);
+	adapter->stats.vptch += IXGB_READ_REG(&adapter->hw, VPTCH);
+	adapter->stats.jptcl += IXGB_READ_REG(&adapter->hw, JPTCL);
+	adapter->stats.jptch += IXGB_READ_REG(&adapter->hw, JPTCH);
+	adapter->stats.gotcl += IXGB_READ_REG(&adapter->hw, GOTCL);
+	adapter->stats.gotch += IXGB_READ_REG(&adapter->hw, GOTCH);
+	adapter->stats.totl += IXGB_READ_REG(&adapter->hw, TOTL);
+	adapter->stats.toth += IXGB_READ_REG(&adapter->hw, TOTH);
+	adapter->stats.dc += IXGB_READ_REG(&adapter->hw, DC);
+	adapter->stats.plt64c += IXGB_READ_REG(&adapter->hw, PLT64C);
+	adapter->stats.tsctc += IXGB_READ_REG(&adapter->hw, TSCTC);
+	adapter->stats.tsctfc += IXGB_READ_REG(&adapter->hw, TSCTFC);
+	adapter->stats.ibic += IXGB_READ_REG(&adapter->hw, IBIC);
+	adapter->stats.rfc += IXGB_READ_REG(&adapter->hw, RFC);
+	adapter->stats.lfc += IXGB_READ_REG(&adapter->hw, LFC);
+	adapter->stats.pfrc += IXGB_READ_REG(&adapter->hw, PFRC);
+	adapter->stats.pftc += IXGB_READ_REG(&adapter->hw, PFTC);
+	adapter->stats.mcfrc += IXGB_READ_REG(&adapter->hw, MCFRC);
+	adapter->stats.mcftc += IXGB_READ_REG(&adapter->hw, MCFTC);
+	adapter->stats.xonrxc += IXGB_READ_REG(&adapter->hw, XONRXC);
+	adapter->stats.xontxc += IXGB_READ_REG(&adapter->hw, XONTXC);
+	adapter->stats.xoffrxc += IXGB_READ_REG(&adapter->hw, XOFFRXC);
+	adapter->stats.xofftxc += IXGB_READ_REG(&adapter->hw, XOFFTXC);
+	adapter->stats.rjc += IXGB_READ_REG(&adapter->hw, RJC);
+
+	/* Fill out the OS statistics structure */
+
+	adapter->net_stats.rx_packets = adapter->stats.gprcl;
+	adapter->net_stats.tx_packets = adapter->stats.gptcl;
+	adapter->net_stats.rx_bytes = adapter->stats.gorcl;
+	adapter->net_stats.tx_bytes = adapter->stats.gotcl;
+	adapter->net_stats.multicast = adapter->stats.mprcl;
+	adapter->net_stats.collisions = 0;
+
+	/* ignore RLEC as it reports errors for padded (<64bytes) frames
+	 * with a length in the type/len field */
+	adapter->net_stats.rx_errors =
+	    /* adapter->stats.rnbc + */ adapter->stats.crcerrs +
+	    adapter->stats.ruc +
+	    adapter->stats.roc /*+ adapter->stats.rlec */  +
+	    adapter->stats.icbc +
+	    adapter->stats.ecbc + adapter->stats.mpc;
+
+	adapter->net_stats.rx_dropped = adapter->stats.mpc;
+
+	/* see above
+	 * adapter->net_stats.rx_length_errors = adapter->stats.rlec;
+	 */
+
+	adapter->net_stats.rx_crc_errors = adapter->stats.crcerrs;
+	adapter->net_stats.rx_fifo_errors = adapter->stats.mpc;
+	adapter->net_stats.rx_missed_errors = adapter->stats.mpc;
+	adapter->net_stats.rx_over_errors = adapter->stats.mpc;
+
+	adapter->net_stats.tx_errors = 0;
+	adapter->net_stats.rx_frame_errors = 0;
+	adapter->net_stats.tx_aborted_errors = 0;
+	adapter->net_stats.tx_carrier_errors = 0;
+	adapter->net_stats.tx_fifo_errors = 0;
+	adapter->net_stats.tx_heartbeat_errors = 0;
+	adapter->net_stats.tx_window_errors = 0;
+}
+
+#define IXGB_MAX_INTR 10
+/**
+ * ixgb_intr - Interrupt Handler
+ * @irq: interrupt number
+ * @data: pointer to a network interface device structure
+ * @pt_regs: CPU registers structure
+ **/
+
+static irqreturn_t
+ixgb_intr(int irq, void *data, struct pt_regs *regs)
+{
+	struct net_device *netdev = data;
+	struct ixgb_adapter *adapter = netdev->priv;
+	struct ixgb_hw *hw = &adapter->hw;
+	uint32_t icr = IXGB_READ_REG(hw, ICR);
+#ifndef CONFIG_IXGB_NAPI
+	unsigned int i;
+#endif
+
+	if(unlikely(!icr))
+		return IRQ_NONE;  /* Not our interrupt */
+
+	if(unlikely(icr & (IXGB_INT_RXSEQ | IXGB_INT_LSC))) {
+		mod_timer(&adapter->watchdog_timer, jiffies);
+	}
+
+#ifdef CONFIG_IXGB_NAPI
+	if(netif_rx_schedule_prep(netdev)) {
+
+		/* Disable interrupts and register for poll. The flush 
+		  of the posted write is intentionally left out.
+		*/
+
+		atomic_inc(&adapter->irq_sem);
+		IXGB_WRITE_REG(&adapter->hw, IMC, ~0);
+		__netif_rx_schedule(netdev);
+	}
+#else
+	/* yes, that is actually a & and it is meant to make sure that
+	 * every pass through this for loop checks both receive and
+	 * transmit queues for completed descriptors, intended to
+	 * avoid starvation issues and assist tx/rx fairness. */
+	for(i = 0; i < IXGB_MAX_INTR; i++)
+		if(!ixgb_clean_rx_irq(adapter) &
+		   !ixgb_clean_tx_irq(adapter))
+			break;
+#endif 
+	return IRQ_HANDLED;
+}
+
+#ifdef CONFIG_IXGB_NAPI
+/**
+ * ixgb_clean - NAPI Rx polling callback
+ * @adapter: board private structure
+ **/
+
+static int
+ixgb_clean(struct net_device *netdev, int *budget)
+{
+	struct ixgb_adapter *adapter = netdev->priv;
+	int work_to_do = min(*budget, netdev->quota);
+	int tx_cleaned;
+	int work_done = 0;
+
+	tx_cleaned = ixgb_clean_tx_irq(adapter);
+	ixgb_clean_rx_irq(adapter, &work_done, work_to_do);
+
+	*budget -= work_done;
+	netdev->quota -= work_done;
+
+	/* if no Tx and not enough Rx work done, exit the polling mode */
+	if((!tx_cleaned && (work_done == 0)) || !netif_running(netdev)) {
+		netif_rx_complete(netdev);
+		ixgb_irq_enable(adapter);
+		return 0;
+	}
+
+	return 1;
+}
+#endif
+
+/**
+ * ixgb_clean_tx_irq - Reclaim resources after transmit completes
+ * @adapter: board private structure
+ **/
+
+static boolean_t
+ixgb_clean_tx_irq(struct ixgb_adapter *adapter)
+{
+	struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
+	struct net_device *netdev = adapter->netdev;
+	struct ixgb_tx_desc *tx_desc, *eop_desc;
+	struct ixgb_buffer *buffer_info;
+	unsigned int i, eop;
+	boolean_t cleaned = FALSE;
+
+	i = tx_ring->next_to_clean;
+	eop = tx_ring->buffer_info[i].next_to_watch;
+	eop_desc = IXGB_TX_DESC(*tx_ring, eop);
+
+	while(eop_desc->status & IXGB_TX_DESC_STATUS_DD) {
+
+		for(cleaned = FALSE; !cleaned; ) {
+			tx_desc = IXGB_TX_DESC(*tx_ring, i);
+			buffer_info = &tx_ring->buffer_info[i];
+
+			if (tx_desc->popts
+			    & (IXGB_TX_DESC_POPTS_TXSM |
+			       IXGB_TX_DESC_POPTS_IXSM))
+				adapter->hw_csum_tx_good++;
+
+			ixgb_unmap_and_free_tx_resource(adapter, buffer_info);
+
+			*(uint32_t *)&(tx_desc->status) = 0;
+
+			cleaned = (i == eop);
+			if(++i == tx_ring->count) i = 0;
+		}
+
+		eop = tx_ring->buffer_info[i].next_to_watch;
+		eop_desc = IXGB_TX_DESC(*tx_ring, eop);
+	}
+
+	tx_ring->next_to_clean = i;
+
+	spin_lock(&adapter->tx_lock);
+	if(cleaned && netif_queue_stopped(netdev) && netif_carrier_ok(netdev) &&
+	   (IXGB_DESC_UNUSED(tx_ring) > IXGB_TX_QUEUE_WAKE)) {
+
+		netif_wake_queue(netdev);
+	}
+	spin_unlock(&adapter->tx_lock);
+
+	if(adapter->detect_tx_hung) {
+		/* detect a transmit hang in hardware, this serializes the
+		 * check with the clearing of time_stamp and movement of i */
+		adapter->detect_tx_hung = FALSE;
+		if(tx_ring->buffer_info[i].dma &&
+		   time_after(jiffies, tx_ring->buffer_info[i].time_stamp + HZ)
+		   && !(IXGB_READ_REG(&adapter->hw, STATUS) &
+			IXGB_STATUS_TXOFF))
+			netif_stop_queue(netdev);
+	}
+
+	return cleaned;
+}
+
+/**
+ * ixgb_rx_checksum - Receive Checksum Offload for 82597.
+ * @adapter: board private structure
+ * @rx_desc: receive descriptor
+ * @sk_buff: socket buffer with received data
+ **/
+
+static inline void
+ixgb_rx_checksum(struct ixgb_adapter *adapter,
+		 struct ixgb_rx_desc *rx_desc,
+		 struct sk_buff *skb)
+{
+	/* Ignore Checksum bit is set OR
+	 * TCP Checksum has not been calculated
+	 */
+	if((rx_desc->status & IXGB_RX_DESC_STATUS_IXSM) ||
+	   (!(rx_desc->status & IXGB_RX_DESC_STATUS_TCPCS))) {
+		skb->ip_summed = CHECKSUM_NONE;
+		return;
+	}
+
+	/* At this point we know the hardware did the TCP checksum */
+	/* now look at the TCP checksum error bit */
+	if(rx_desc->errors & IXGB_RX_DESC_ERRORS_TCPE) {
+		/* let the stack verify checksum errors */
+		skb->ip_summed = CHECKSUM_NONE;
+		adapter->hw_csum_rx_error++;
+	} else {
+		/* TCP checksum is good */
+		skb->ip_summed = CHECKSUM_UNNECESSARY;
+		adapter->hw_csum_rx_good++;
+	}
+}
+
+/**
+ * ixgb_clean_rx_irq - Send received data up the network stack,
+ * @adapter: board private structure
+ **/
+
+static boolean_t
+#ifdef CONFIG_IXGB_NAPI
+ixgb_clean_rx_irq(struct ixgb_adapter *adapter, int *work_done, int work_to_do)
+#else
+ixgb_clean_rx_irq(struct ixgb_adapter *adapter)
+#endif
+{
+	struct ixgb_desc_ring *rx_ring = &adapter->rx_ring;
+	struct net_device *netdev = adapter->netdev;
+	struct pci_dev *pdev = adapter->pdev;
+	struct ixgb_rx_desc *rx_desc, *next_rxd;
+	struct ixgb_buffer *buffer_info, *next_buffer, *next2_buffer;
+	struct sk_buff *skb, *next_skb;
+	uint32_t length;
+	unsigned int i, j;
+	boolean_t cleaned = FALSE;
+
+	i = rx_ring->next_to_clean;
+	rx_desc = IXGB_RX_DESC(*rx_ring, i);
+	buffer_info = &rx_ring->buffer_info[i];
+
+	while(rx_desc->status & IXGB_RX_DESC_STATUS_DD) {
+
+#ifdef CONFIG_IXGB_NAPI
+		if(*work_done >= work_to_do)
+			break;
+
+		(*work_done)++;
+#endif
+		skb = buffer_info->skb;
+		prefetch(skb->data);
+
+		if(++i == rx_ring->count) i = 0;
+		next_rxd = IXGB_RX_DESC(*rx_ring, i);
+		prefetch(next_rxd);
+
+		if((j = i + 1) == rx_ring->count) j = 0;
+		next2_buffer = &rx_ring->buffer_info[j];
+		prefetch(next2_buffer);
+
+		next_buffer = &rx_ring->buffer_info[i];
+		next_skb = next_buffer->skb;
+		prefetch(next_skb);
+
+
+		cleaned = TRUE;
+
+		pci_unmap_single(pdev,
+				 buffer_info->dma,
+				 buffer_info->length,
+				 PCI_DMA_FROMDEVICE);
+
+		length = le16_to_cpu(rx_desc->length);
+
+		if(unlikely(!(rx_desc->status & IXGB_RX_DESC_STATUS_EOP))) {
+
+			/* All receives must fit into a single buffer */
+
+			IXGB_DBG("Receive packet consumed multiple buffers "
+					 "length<%x>\n", length);
+
+			dev_kfree_skb_irq(skb);
+			rx_desc->status = 0;
+			buffer_info->skb = NULL;
+
+			rx_desc = next_rxd;
+			buffer_info = next_buffer;
+			continue;
+		}
+
+		if (unlikely(rx_desc->errors
+			     & (IXGB_RX_DESC_ERRORS_CE | IXGB_RX_DESC_ERRORS_SE
+				| IXGB_RX_DESC_ERRORS_P |
+				IXGB_RX_DESC_ERRORS_RXE))) {
+
+			dev_kfree_skb_irq(skb);
+			rx_desc->status = 0;
+			buffer_info->skb = NULL;
+
+			rx_desc = next_rxd;
+			buffer_info = next_buffer;
+			continue;
+		}
+
+		/* Good Receive */
+		skb_put(skb, length);
+
+		/* Receive Checksum Offload */
+		ixgb_rx_checksum(adapter, rx_desc, skb);
+
+		skb->protocol = eth_type_trans(skb, netdev);
+#ifdef CONFIG_IXGB_NAPI
+		if(adapter->vlgrp && (rx_desc->status & IXGB_RX_DESC_STATUS_VP)) {
+			vlan_hwaccel_receive_skb(skb, adapter->vlgrp,
+				le16_to_cpu(rx_desc->special) &
+					IXGB_RX_DESC_SPECIAL_VLAN_MASK);
+		} else {
+			netif_receive_skb(skb);
+		}
+#else /* CONFIG_IXGB_NAPI */
+		if(adapter->vlgrp && (rx_desc->status & IXGB_RX_DESC_STATUS_VP)) {
+			vlan_hwaccel_rx(skb, adapter->vlgrp,
+				le16_to_cpu(rx_desc->special) &
+					IXGB_RX_DESC_SPECIAL_VLAN_MASK);
+		} else {
+			netif_rx(skb);
+		}
+#endif /* CONFIG_IXGB_NAPI */
+		netdev->last_rx = jiffies;
+
+		rx_desc->status = 0;
+		buffer_info->skb = NULL;
+
+		rx_desc = next_rxd;
+		buffer_info = next_buffer;
+	}
+
+	rx_ring->next_to_clean = i;
+
+	ixgb_alloc_rx_buffers(adapter);
+
+	return cleaned;
+}
+
+/**
+ * ixgb_alloc_rx_buffers - Replace used receive buffers
+ * @adapter: address of board private structure
+ **/
+
+static void
+ixgb_alloc_rx_buffers(struct ixgb_adapter *adapter)
+{
+	struct ixgb_desc_ring *rx_ring = &adapter->rx_ring;
+	struct net_device *netdev = adapter->netdev;
+	struct pci_dev *pdev = adapter->pdev;
+	struct ixgb_rx_desc *rx_desc;
+	struct ixgb_buffer *buffer_info;
+	struct sk_buff *skb;
+	unsigned int i;
+	int num_group_tail_writes;
+	long cleancount;
+
+	i = rx_ring->next_to_use;
+	buffer_info = &rx_ring->buffer_info[i];
+	cleancount = IXGB_DESC_UNUSED(rx_ring);
+
+	num_group_tail_writes = IXGB_RX_BUFFER_WRITE;
+
+	/* leave one descriptor unused */
+	while(--cleancount > 0) {
+		rx_desc = IXGB_RX_DESC(*rx_ring, i);
+
+		skb = dev_alloc_skb(adapter->rx_buffer_len + NET_IP_ALIGN);
+
+		if(unlikely(!skb)) {
+			/* Better luck next round */
+			break;
+		}
+
+		/* Make buffer alignment 2 beyond a 16 byte boundary
+		 * this will result in a 16 byte aligned IP header after
+		 * the 14 byte MAC header is removed
+		 */
+		skb_reserve(skb, NET_IP_ALIGN);
+
+		skb->dev = netdev;
+
+		buffer_info->skb = skb;
+		buffer_info->length = adapter->rx_buffer_len;
+		buffer_info->dma =
+			pci_map_single(pdev,
+				   skb->data,
+				   adapter->rx_buffer_len,
+				   PCI_DMA_FROMDEVICE);
+
+		rx_desc->buff_addr = cpu_to_le64(buffer_info->dma);
+
+		if((i & ~(num_group_tail_writes- 1)) == i) {
+			/* Force memory writes to complete before letting h/w
+			 * know there are new descriptors to fetch.  (Only
+			 * applicable for weak-ordered memory model archs,
+			 * such as IA-64). */
+			wmb();
+
+			IXGB_WRITE_REG(&adapter->hw, RDT, i);
+		}
+
+		if(++i == rx_ring->count) i = 0;
+		buffer_info = &rx_ring->buffer_info[i];
+	}
+
+	rx_ring->next_to_use = i;
+}
+
+/**
+ * ixgb_vlan_rx_register - enables or disables vlan tagging/stripping.
+ * 
+ * @param netdev network interface device structure
+ * @param grp indicates to enable or disable tagging/stripping
+ **/
+static void
+ixgb_vlan_rx_register(struct net_device *netdev, struct vlan_group *grp)
+{
+	struct ixgb_adapter *adapter = netdev->priv;
+	uint32_t ctrl, rctl;
+
+	ixgb_irq_disable(adapter);
+	adapter->vlgrp = grp;
+
+	if(grp) {
+		/* enable VLAN tag insert/strip */
+		ctrl = IXGB_READ_REG(&adapter->hw, CTRL0);
+		ctrl |= IXGB_CTRL0_VME;
+		IXGB_WRITE_REG(&adapter->hw, CTRL0, ctrl);
+
+		/* enable VLAN receive filtering */
+
+		rctl = IXGB_READ_REG(&adapter->hw, RCTL);
+		rctl |= IXGB_RCTL_VFE;
+		rctl &= ~IXGB_RCTL_CFIEN;
+		IXGB_WRITE_REG(&adapter->hw, RCTL, rctl);
+	} else {
+		/* disable VLAN tag insert/strip */
+
+		ctrl = IXGB_READ_REG(&adapter->hw, CTRL0);
+		ctrl &= ~IXGB_CTRL0_VME;
+		IXGB_WRITE_REG(&adapter->hw, CTRL0, ctrl);
+
+		/* disable VLAN filtering */
+
+		rctl = IXGB_READ_REG(&adapter->hw, RCTL);
+		rctl &= ~IXGB_RCTL_VFE;
+		IXGB_WRITE_REG(&adapter->hw, RCTL, rctl);
+	}
+
+	ixgb_irq_enable(adapter);
+}
+
+static void
+ixgb_vlan_rx_add_vid(struct net_device *netdev, uint16_t vid)
+{
+	struct ixgb_adapter *adapter = netdev->priv;
+	uint32_t vfta, index;
+
+	/* add VID to filter table */
+
+	index = (vid >> 5) & 0x7F;
+	vfta = IXGB_READ_REG_ARRAY(&adapter->hw, VFTA, index);
+	vfta |= (1 << (vid & 0x1F));
+	ixgb_write_vfta(&adapter->hw, index, vfta);
+}
+
+static void
+ixgb_vlan_rx_kill_vid(struct net_device *netdev, uint16_t vid)
+{
+	struct ixgb_adapter *adapter = netdev->priv;
+	uint32_t vfta, index;
+
+	ixgb_irq_disable(adapter);
+
+	if(adapter->vlgrp)
+		adapter->vlgrp->vlan_devices[vid] = NULL;
+
+	ixgb_irq_enable(adapter);
+
+	/* remove VID from filter table*/
+
+	index = (vid >> 5) & 0x7F;
+	vfta = IXGB_READ_REG_ARRAY(&adapter->hw, VFTA, index);
+	vfta &= ~(1 << (vid & 0x1F));
+	ixgb_write_vfta(&adapter->hw, index, vfta);
+}
+
+static void
+ixgb_restore_vlan(struct ixgb_adapter *adapter)
+{
+	ixgb_vlan_rx_register(adapter->netdev, adapter->vlgrp);
+
+	if(adapter->vlgrp) {
+		uint16_t vid;
+		for(vid = 0; vid < VLAN_GROUP_ARRAY_LEN; vid++) {
+			if(!adapter->vlgrp->vlan_devices[vid])
+				continue;
+			ixgb_vlan_rx_add_vid(adapter->netdev, vid);
+		}
+	}
+}
+
+/**
+ * ixgb_notify_reboot - handles OS notification of reboot event.
+ * @param nb notifier block, unused
+ * @param event Event being passed to driver to act upon
+ * @param p A pointer to our net device
+ **/
+static int
+ixgb_notify_reboot(struct notifier_block *nb, unsigned long event, void *p)
+{
+	struct pci_dev *pdev = NULL;
+
+	switch(event) {
+	case SYS_DOWN:
+	case SYS_HALT:
+	case SYS_POWER_OFF:
+		while ((pdev = pci_find_device(PCI_ANY_ID, PCI_ANY_ID, pdev))) {
+			if (pci_dev_driver(pdev) == &ixgb_driver)
+				ixgb_suspend(pdev, 3);
+		}
+	}
+	return NOTIFY_DONE;
+}
+
+/**
+ * ixgb_suspend - driver suspend function called from notify.
+ * @param pdev pci driver structure used for passing to
+ * @param state power state to enter 
+ **/
+static int
+ixgb_suspend(struct pci_dev *pdev, uint32_t state)
+{
+	struct net_device *netdev = pci_get_drvdata(pdev);
+	struct ixgb_adapter *adapter = netdev->priv;
+
+	netif_device_detach(netdev);
+
+	if(netif_running(netdev))
+		ixgb_down(adapter, TRUE);
+
+	pci_save_state(pdev);
+
+	state = (state > 0) ? 3 : 0;
+	pci_set_power_state(pdev, state);
+	msec_delay(200);
+
+	return 0;
+}
+
+#ifdef CONFIG_NET_POLL_CONTROLLER
+/*
+ * Polling 'interrupt' - used by things like netconsole to send skbs
+ * without having to re-enable interrupts. It's not called while
+ * the interrupt routine is executing.
+ */
+
+static void ixgb_netpoll(struct net_device *dev)
+{
+	struct ixgb_adapter *adapter = dev->priv;
+	disable_irq(adapter->pdev->irq);
+	ixgb_intr(adapter->pdev->irq, dev, NULL);
+	enable_irq(adapter->pdev->irq);
+}
+#endif
+
+/* ixgb_main.c */