Merge branch 'next' into for-linus

Prepare input updates for 6.6 merge window.

1 files changed, 0 insertions, 2285 deletions

diff --git a/drivers/net/ethernet/intel/ixgb/ixgb_main.c b/drivers/net/ethernet/intel/ixgb/ixgb_main.c
deleted file mode 100644
index b4d47e7a76c8..000000000000
--- a/drivers/net/ethernet/intel/ixgb/ixgb_main.c
+++ /dev/null
@@ -1,2285 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/* Copyright(c) 1999 - 2008 Intel Corporation. */
-
-#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
-
-#include <linux/prefetch.h>
-#include "ixgb.h"
-
-char ixgb_driver_name[] = "ixgb";
-static char ixgb_driver_string[] = "Intel(R) PRO/10GbE Network Driver";
-
-static const char ixgb_copyright[] = "Copyright (c) 1999-2008 Intel Corporation.";
-
-#define IXGB_CB_LENGTH 256
-static unsigned int copybreak __read_mostly = IXGB_CB_LENGTH;
-module_param(copybreak, uint, 0644);
-MODULE_PARM_DESC(copybreak,
-	"Maximum size of packet that is copied to a new buffer on receive");
-
-/* 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 const struct pci_device_id ixgb_pci_tbl[] = {
-	{PCI_VENDOR_ID_INTEL, IXGB_DEVICE_ID_82597EX,
-	 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
-	{PCI_VENDOR_ID_INTEL, IXGB_DEVICE_ID_82597EX_CX4,
-	 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
-	{PCI_VENDOR_ID_INTEL, IXGB_DEVICE_ID_82597EX_SR,
-	 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
-	{PCI_VENDOR_ID_INTEL, 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 */
-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 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(struct timer_list *t);
-static netdev_tx_t ixgb_xmit_frame(struct sk_buff *skb,
-				   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);
-static bool ixgb_clean_tx_irq(struct ixgb_adapter *adapter);
-
-static int ixgb_clean(struct napi_struct *, int);
-static bool ixgb_clean_rx_irq(struct ixgb_adapter *, int *, int);
-static void ixgb_alloc_rx_buffers(struct ixgb_adapter *, int);
-
-static void ixgb_tx_timeout(struct net_device *dev, unsigned int txqueue);
-static void ixgb_tx_timeout_task(struct work_struct *work);
-
-static void ixgb_vlan_strip_enable(struct ixgb_adapter *adapter);
-static void ixgb_vlan_strip_disable(struct ixgb_adapter *adapter);
-static int ixgb_vlan_rx_add_vid(struct net_device *netdev,
-				__be16 proto, u16 vid);
-static int ixgb_vlan_rx_kill_vid(struct net_device *netdev,
-				 __be16 proto, u16 vid);
-static void ixgb_restore_vlan(struct ixgb_adapter *adapter);
-
-static pci_ers_result_t ixgb_io_error_detected (struct pci_dev *pdev,
-                             pci_channel_state_t state);
-static pci_ers_result_t ixgb_io_slot_reset (struct pci_dev *pdev);
-static void ixgb_io_resume (struct pci_dev *pdev);
-
-static const struct pci_error_handlers ixgb_err_handler = {
-	.error_detected = ixgb_io_error_detected,
-	.slot_reset = ixgb_io_slot_reset,
-	.resume = ixgb_io_resume,
-};
-
-static struct pci_driver ixgb_driver = {
-	.name     = ixgb_driver_name,
-	.id_table = ixgb_pci_tbl,
-	.probe    = ixgb_probe,
-	.remove   = ixgb_remove,
-	.err_handler = &ixgb_err_handler
-};
-
-MODULE_AUTHOR("Intel Corporation, <[email protected]>");
-MODULE_DESCRIPTION("Intel(R) PRO/10GbE Network Driver");
-MODULE_LICENSE("GPL v2");
-
-#define DEFAULT_MSG_ENABLE (NETIF_MSG_DRV|NETIF_MSG_PROBE|NETIF_MSG_LINK)
-static int debug = -1;
-module_param(debug, int, 0);
-MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
-
-/**
- * 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)
-{
-	pr_info("%s\n", ixgb_driver_string);
-	pr_info("%s\n", ixgb_copyright);
-
-	return pci_register_driver(&ixgb_driver);
-}
-
-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)
-{
-	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 void
-ixgb_irq_disable(struct ixgb_adapter *adapter)
-{
-	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 void
-ixgb_irq_enable(struct ixgb_adapter *adapter)
-{
-	u32 val = IXGB_INT_RXT0 | IXGB_INT_RXDMT0 |
-		  IXGB_INT_TXDW | IXGB_INT_LSC;
-	if (adapter->hw.subsystem_vendor_id == PCI_VENDOR_ID_SUN)
-		val |= IXGB_INT_GPI0;
-	IXGB_WRITE_REG(&adapter->hw, IMS, val);
-	IXGB_WRITE_FLUSH(&adapter->hw);
-}
-
-int
-ixgb_up(struct ixgb_adapter *adapter)
-{
-	struct net_device *netdev = adapter->netdev;
-	int err, irq_flags = IRQF_SHARED;
-	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_rar_set(hw, netdev->dev_addr, 0);
-	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, IXGB_DESC_UNUSED(&adapter->rx_ring));
-
-	/* disable interrupts and get the hardware into a known state */
-	IXGB_WRITE_REG(&adapter->hw, IMC, 0xffffffff);
-
-	/* only enable MSI if bus is in PCI-X mode */
-	if (IXGB_READ_REG(&adapter->hw, STATUS) & IXGB_STATUS_PCIX_MODE) {
-		err = pci_enable_msi(adapter->pdev);
-		if (!err) {
-			adapter->have_msi = true;
-			irq_flags = 0;
-		}
-		/* proceed to try to request regular interrupt */
-	}
-
-	err = request_irq(adapter->pdev->irq, ixgb_intr, irq_flags,
-	                  netdev->name, netdev);
-	if (err) {
-		if (adapter->have_msi)
-			pci_disable_msi(adapter->pdev);
-		netif_err(adapter, probe, adapter->netdev,
-			  "Unable to allocate interrupt Error: %d\n", err);
-		return err;
-	}
-
-	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) {
-			u32 ctrl0 = IXGB_READ_REG(hw, CTRL0);
-
-			if (!(ctrl0 & IXGB_CTRL0_JFE)) {
-				ctrl0 |= IXGB_CTRL0_JFE;
-				IXGB_WRITE_REG(hw, CTRL0, ctrl0);
-			}
-		}
-	}
-
-	clear_bit(__IXGB_DOWN, &adapter->flags);
-
-	napi_enable(&adapter->napi);
-	ixgb_irq_enable(adapter);
-
-	netif_wake_queue(netdev);
-
-	mod_timer(&adapter->watchdog_timer, jiffies);
-
-	return 0;
-}
-
-void
-ixgb_down(struct ixgb_adapter *adapter, bool kill_watchdog)
-{
-	struct net_device *netdev = adapter->netdev;
-
-	/* prevent the interrupt handler from restarting watchdog */
-	set_bit(__IXGB_DOWN, &adapter->flags);
-
-	netif_carrier_off(netdev);
-
-	napi_disable(&adapter->napi);
-	/* waiting for NAPI to complete can re-enable interrupts */
-	ixgb_irq_disable(adapter);
-	free_irq(adapter->pdev->irq, netdev);
-
-	if (adapter->have_msi)
-		pci_disable_msi(adapter->pdev);
-
-	if (kill_watchdog)
-		del_timer_sync(&adapter->watchdog_timer);
-
-	adapter->link_speed = 0;
-	adapter->link_duplex = 0;
-	netif_stop_queue(netdev);
-
-	ixgb_reset(adapter);
-	ixgb_clean_tx_ring(adapter);
-	ixgb_clean_rx_ring(adapter);
-}
-
-void
-ixgb_reset(struct ixgb_adapter *adapter)
-{
-	struct ixgb_hw *hw = &adapter->hw;
-
-	ixgb_adapter_stop(hw);
-	if (!ixgb_init_hw(hw))
-		netif_err(adapter, probe, adapter->netdev, "ixgb_init_hw failed\n");
-
-	/* restore frame size information */
-	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) {
-		u32 ctrl0 = IXGB_READ_REG(hw, CTRL0);
-		if (!(ctrl0 & IXGB_CTRL0_JFE)) {
-			ctrl0 |= IXGB_CTRL0_JFE;
-			IXGB_WRITE_REG(hw, CTRL0, ctrl0);
-		}
-	}
-}
-
-static netdev_features_t
-ixgb_fix_features(struct net_device *netdev, netdev_features_t features)
-{
-	/*
-	 * Tx VLAN insertion does not work per HW design when Rx stripping is
-	 * disabled.
-	 */
-	if (!(features & NETIF_F_HW_VLAN_CTAG_RX))
-		features &= ~NETIF_F_HW_VLAN_CTAG_TX;
-
-	return features;
-}
-
-static int
-ixgb_set_features(struct net_device *netdev, netdev_features_t features)
-{
-	struct ixgb_adapter *adapter = netdev_priv(netdev);
-	netdev_features_t changed = features ^ netdev->features;
-
-	if (!(changed & (NETIF_F_RXCSUM|NETIF_F_HW_VLAN_CTAG_RX)))
-		return 0;
-
-	adapter->rx_csum = !!(features & NETIF_F_RXCSUM);
-
-	if (netif_running(netdev)) {
-		ixgb_down(adapter, true);
-		ixgb_up(adapter);
-		ixgb_set_speed_duplex(netdev);
-	} else
-		ixgb_reset(adapter);
-
-	return 0;
-}
-
-
-static const struct net_device_ops ixgb_netdev_ops = {
-	.ndo_open 		= ixgb_open,
-	.ndo_stop		= ixgb_close,
-	.ndo_start_xmit		= ixgb_xmit_frame,
-	.ndo_set_rx_mode	= ixgb_set_multi,
-	.ndo_validate_addr	= eth_validate_addr,
-	.ndo_set_mac_address	= ixgb_set_mac,
-	.ndo_change_mtu		= ixgb_change_mtu,
-	.ndo_tx_timeout		= ixgb_tx_timeout,
-	.ndo_vlan_rx_add_vid	= ixgb_vlan_rx_add_vid,
-	.ndo_vlan_rx_kill_vid	= ixgb_vlan_rx_kill_vid,
-	.ndo_fix_features       = ixgb_fix_features,
-	.ndo_set_features       = ixgb_set_features,
-};
-
-/**
- * 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
-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;
-	u8 addr[ETH_ALEN];
-	int i;
-	int err;
-
-	err = pci_enable_device(pdev);
-	if (err)
-		return err;
-
-	err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
-	if (err) {
-		pr_err("No usable DMA configuration, aborting\n");
-		goto err_dma_mask;
-	}
-
-	err = pci_request_regions(pdev, ixgb_driver_name);
-	if (err)
-		goto err_request_regions;
-
-	pci_set_master(pdev);
-
-	netdev = alloc_etherdev(sizeof(struct ixgb_adapter));
-	if (!netdev) {
-		err = -ENOMEM;
-		goto err_alloc_etherdev;
-	}
-
-	SET_NETDEV_DEV(netdev, &pdev->dev);
-
-	pci_set_drvdata(pdev, netdev);
-	adapter = netdev_priv(netdev);
-	adapter->netdev = netdev;
-	adapter->pdev = pdev;
-	adapter->hw.back = adapter;
-	adapter->msg_enable = netif_msg_init(debug, DEFAULT_MSG_ENABLE);
-
-	adapter->hw.hw_addr = pci_ioremap_bar(pdev, BAR_0);
-	if (!adapter->hw.hw_addr) {
-		err = -EIO;
-		goto err_ioremap;
-	}
-
-	for (i = BAR_1; i < PCI_STD_NUM_BARS; 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->netdev_ops = &ixgb_netdev_ops;
-	ixgb_set_ethtool_ops(netdev);
-	netdev->watchdog_timeo = 5 * HZ;
-	netif_napi_add(netdev, &adapter->napi, ixgb_clean);
-
-	strncpy(netdev->name, pci_name(pdev), sizeof(netdev->name) - 1);
-
-	adapter->bd_number = cards_found;
-	adapter->link_speed = 0;
-	adapter->link_duplex = 0;
-
-	/* setup the private structure */
-
-	err = ixgb_sw_init(adapter);
-	if (err)
-		goto err_sw_init;
-
-	netdev->hw_features = NETIF_F_SG |
-			   NETIF_F_TSO |
-			   NETIF_F_HW_CSUM |
-			   NETIF_F_HW_VLAN_CTAG_TX |
-			   NETIF_F_HW_VLAN_CTAG_RX;
-	netdev->features = netdev->hw_features |
-			   NETIF_F_HW_VLAN_CTAG_FILTER;
-	netdev->hw_features |= NETIF_F_RXCSUM;
-
-	netdev->features |= NETIF_F_HIGHDMA;
-	netdev->vlan_features |= NETIF_F_HIGHDMA;
-
-	/* MTU range: 68 - 16114 */
-	netdev->min_mtu = ETH_MIN_MTU;
-	netdev->max_mtu = IXGB_MAX_JUMBO_FRAME_SIZE - ETH_HLEN;
-
-	/* make sure the EEPROM is good */
-
-	if (!ixgb_validate_eeprom_checksum(&adapter->hw)) {
-		netif_err(adapter, probe, adapter->netdev,
-			  "The EEPROM Checksum Is Not Valid\n");
-		err = -EIO;
-		goto err_eeprom;
-	}
-
-	ixgb_get_ee_mac_addr(&adapter->hw, addr);
-	eth_hw_addr_set(netdev, addr);
-
-	if (!is_valid_ether_addr(netdev->dev_addr)) {
-		netif_err(adapter, probe, adapter->netdev, "Invalid MAC Address\n");
-		err = -EIO;
-		goto err_eeprom;
-	}
-
-	adapter->part_num = ixgb_get_ee_pba_number(&adapter->hw);
-
-	timer_setup(&adapter->watchdog_timer, ixgb_watchdog, 0);
-
-	INIT_WORK(&adapter->tx_timeout_task, ixgb_tx_timeout_task);
-
-	strcpy(netdev->name, "eth%d");
-	err = register_netdev(netdev);
-	if (err)
-		goto err_register;
-
-	/* carrier off reporting is important to ethtool even BEFORE open */
-	netif_carrier_off(netdev);
-
-	netif_info(adapter, probe, adapter->netdev,
-		   "Intel(R) PRO/10GbE Network Connection\n");
-	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);
-err_request_regions:
-err_dma_mask:
-	pci_disable_device(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
-ixgb_remove(struct pci_dev *pdev)
-{
-	struct net_device *netdev = pci_get_drvdata(pdev);
-	struct ixgb_adapter *adapter = netdev_priv(netdev);
-
-	cancel_work_sync(&adapter->tx_timeout_task);
-
-	unregister_netdev(netdev);
-
-	iounmap(adapter->hw.hw_addr);
-	pci_release_regions(pdev);
-
-	free_netdev(netdev);
-	pci_disable_device(pdev);
-}
-
-/**
- * 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
-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;
-
-	hw->max_frame_size = netdev->mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH;
-	adapter->rx_buffer_len = hw->max_frame_size + 8; /* + 8 for errata */
-
-	if ((hw->device_id == IXGB_DEVICE_ID_82597EX) ||
-	    (hw->device_id == IXGB_DEVICE_ID_82597EX_CX4) ||
-	    (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 */
-		netif_err(adapter, probe, adapter->netdev, "unsupported device id\n");
-	}
-
-	/* enable flow control to be programmed */
-	hw->fc.send_xon = 1;
-
-	set_bit(__IXGB_DOWN, &adapter->flags);
-	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(netdev);
-	int err;
-
-	/* allocate transmit descriptors */
-	err = ixgb_setup_tx_resources(adapter);
-	if (err)
-		goto err_setup_tx;
-
-	netif_carrier_off(netdev);
-
-	/* allocate receive descriptors */
-
-	err = ixgb_setup_rx_resources(adapter);
-	if (err)
-		goto err_setup_rx;
-
-	err = ixgb_up(adapter);
-	if (err)
-		goto err_up;
-
-	netif_start_queue(netdev);
-
-	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(netdev);
-
-	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 = vzalloc(size);
-	if (!txdr->buffer_info)
-		return -ENOMEM;
-
-	/* round up to nearest 4K */
-
-	txdr->size = txdr->count * sizeof(struct ixgb_tx_desc);
-	txdr->size = ALIGN(txdr->size, 4096);
-
-	txdr->desc = dma_alloc_coherent(&pdev->dev, txdr->size, &txdr->dma,
-					GFP_KERNEL);
-	if (!txdr->desc) {
-		vfree(txdr->buffer_info);
-		return -ENOMEM;
-	}
-
-	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)
-{
-	u64 tdba = adapter->tx_ring.dma;
-	u32 tdlen = adapter->tx_ring.count * sizeof(struct ixgb_tx_desc);
-	u32 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 = vzalloc(size);
-	if (!rxdr->buffer_info)
-		return -ENOMEM;
-
-	/* Round up to nearest 4K */
-
-	rxdr->size = rxdr->count * sizeof(struct ixgb_rx_desc);
-	rxdr->size = ALIGN(rxdr->size, 4096);
-
-	rxdr->desc = dma_alloc_coherent(&pdev->dev, rxdr->size, &rxdr->dma,
-					GFP_KERNEL);
-
-	if (!rxdr->desc) {
-		vfree(rxdr->buffer_info);
-		return -ENOMEM;
-	}
-
-	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)
-{
-	u32 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;
-
-	if (adapter->rx_buffer_len <= IXGB_RXBUFFER_2048)
-		rctl |= IXGB_RCTL_BSIZE_2048;
-	else if (adapter->rx_buffer_len <= IXGB_RXBUFFER_4096)
-		rctl |= IXGB_RCTL_BSIZE_4096;
-	else if (adapter->rx_buffer_len <= IXGB_RXBUFFER_8192)
-		rctl |= IXGB_RCTL_BSIZE_8192;
-	else if (adapter->rx_buffer_len <= IXGB_RXBUFFER_16384)
-		rctl |= IXGB_RCTL_BSIZE_16384;
-
-	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)
-{
-	u64 rdba = adapter->rx_ring.dma;
-	u32 rdlen = adapter->rx_ring.count * sizeof(struct ixgb_rx_desc);
-	struct ixgb_hw *hw = &adapter->hw;
-	u32 rctl;
-	u32 rxcsum;
-
-	/* 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);
-
-	/* due to the hardware errata with RXDCTL, we are unable to use any of
-	 * the performance enhancing features of it without causing other
-	 * subtle bugs, some of the bugs could include receive length
-	 * corruption at high data rates (WTHRESH > 0) and/or receive
-	 * descriptor ring irregularites (particularly in hardware cache) */
-	IXGB_WRITE_REG(hw, RXDCTL, 0);
-
-	/* Enable Receive Checksum Offload for TCP and UDP */
-	if (adapter->rx_csum) {
-		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;
-
-	dma_free_coherent(&pdev->dev, adapter->tx_ring.size,
-			  adapter->tx_ring.desc, adapter->tx_ring.dma);
-
-	adapter->tx_ring.desc = NULL;
-}
-
-static void
-ixgb_unmap_and_free_tx_resource(struct ixgb_adapter *adapter,
-                                struct ixgb_buffer *buffer_info)
-{
-	if (buffer_info->dma) {
-		if (buffer_info->mapped_as_page)
-			dma_unmap_page(&adapter->pdev->dev, buffer_info->dma,
-				       buffer_info->length, DMA_TO_DEVICE);
-		else
-			dma_unmap_single(&adapter->pdev->dev, buffer_info->dma,
-					 buffer_info->length, DMA_TO_DEVICE);
-		buffer_info->dma = 0;
-	}
-
-	if (buffer_info->skb) {
-		dev_kfree_skb_any(buffer_info->skb);
-		buffer_info->skb = NULL;
-	}
-	buffer_info->time_stamp = 0;
-	/* these fields must always be initialized in tx
-	 * buffer_info->length = 0;
-	 * buffer_info->next_to_watch = 0; */
-}
-
-/**
- * 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;
-
-	dma_free_coherent(&pdev->dev, 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->dma) {
-			dma_unmap_single(&pdev->dev,
-					 buffer_info->dma,
-					 buffer_info->length,
-					 DMA_FROM_DEVICE);
-			buffer_info->dma = 0;
-			buffer_info->length = 0;
-		}
-
-		if (buffer_info->skb) {
-			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(netdev);
-	struct sockaddr *addr = p;
-
-	if (!is_valid_ether_addr(addr->sa_data))
-		return -EADDRNOTAVAIL;
-
-	eth_hw_addr_set(netdev, addr->sa_data);
-
-	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(netdev);
-	struct ixgb_hw *hw = &adapter->hw;
-	struct netdev_hw_addr *ha;
-	u32 rctl;
-
-	/* 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);
-		/* disable VLAN filtering */
-		rctl &= ~IXGB_RCTL_CFIEN;
-		rctl &= ~IXGB_RCTL_VFE;
-	} else {
-		if (netdev->flags & IFF_ALLMULTI) {
-			rctl |= IXGB_RCTL_MPE;
-			rctl &= ~IXGB_RCTL_UPE;
-		} else {
-			rctl &= ~(IXGB_RCTL_UPE | IXGB_RCTL_MPE);
-		}
-		/* enable VLAN filtering */
-		rctl |= IXGB_RCTL_VFE;
-		rctl &= ~IXGB_RCTL_CFIEN;
-	}
-
-	if (netdev_mc_count(netdev) > IXGB_MAX_NUM_MULTICAST_ADDRESSES) {
-		rctl |= IXGB_RCTL_MPE;
-		IXGB_WRITE_REG(hw, RCTL, rctl);
-	} else {
-		u8 *mta = kmalloc_array(ETH_ALEN,
-				        IXGB_MAX_NUM_MULTICAST_ADDRESSES,
-				        GFP_ATOMIC);
-		u8 *addr;
-		if (!mta)
-			goto alloc_failed;
-
-		IXGB_WRITE_REG(hw, RCTL, rctl);
-
-		addr = mta;
-		netdev_for_each_mc_addr(ha, netdev) {
-			memcpy(addr, ha->addr, ETH_ALEN);
-			addr += ETH_ALEN;
-		}
-
-		ixgb_mc_addr_list_update(hw, mta, netdev_mc_count(netdev), 0);
-		kfree(mta);
-	}
-
-alloc_failed:
-	if (netdev->features & NETIF_F_HW_VLAN_CTAG_RX)
-		ixgb_vlan_strip_enable(adapter);
-	else
-		ixgb_vlan_strip_disable(adapter);
-
-}
-
-/**
- * ixgb_watchdog - Timer Call-back
- * @t: pointer to timer_list containing our private info pointer
- **/
-
-static void
-ixgb_watchdog(struct timer_list *t)
-{
-	struct ixgb_adapter *adapter = from_timer(adapter, t, watchdog_timer);
-	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)) {
-			netdev_info(netdev,
-				    "NIC Link is Up 10 Gbps Full Duplex, Flow Control: %s\n",
-				    (adapter->hw.fc.type == ixgb_fc_full) ?
-				    "RX/TX" :
-				    (adapter->hw.fc.type == ixgb_fc_rx_pause) ?
-				     "RX" :
-				    (adapter->hw.fc.type == ixgb_fc_tx_pause) ?
-				    "TX" : "None");
-			adapter->link_speed = 10000;
-			adapter->link_duplex = FULL_DUPLEX;
-			netif_carrier_on(netdev);
-		}
-	} else {
-		if (netif_carrier_ok(netdev)) {
-			adapter->link_speed = 0;
-			adapter->link_duplex = 0;
-			netdev_info(netdev, "NIC Link is Down\n");
-			netif_carrier_off(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);
-			/* return immediately since reset is imminent */
-			return;
-		}
-	}
-
-	/* 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 int
-ixgb_tso(struct ixgb_adapter *adapter, struct sk_buff *skb)
-{
-	struct ixgb_context_desc *context_desc;
-	unsigned int i;
-	u8 ipcss, ipcso, tucss, tucso, hdr_len;
-	u16 ipcse, tucse, mss;
-
-	if (likely(skb_is_gso(skb))) {
-		struct ixgb_buffer *buffer_info;
-		struct iphdr *iph;
-		int err;
-
-		err = skb_cow_head(skb, 0);
-		if (err < 0)
-			return err;
-
-		hdr_len = skb_tcp_all_headers(skb);
-		mss = skb_shinfo(skb)->gso_size;
-		iph = ip_hdr(skb);
-		iph->tot_len = 0;
-		iph->check = 0;
-		tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
-							 iph->daddr, 0,
-							 IPPROTO_TCP, 0);
-		ipcss = skb_network_offset(skb);
-		ipcso = (void *)&(iph->check) - (void *)skb->data;
-		ipcse = skb_transport_offset(skb) - 1;
-		tucss = skb_transport_offset(skb);
-		tucso = (void *)&(tcp_hdr(skb)->check) - (void *)skb->data;
-		tucse = 0;
-
-		i = adapter->tx_ring.next_to_use;
-		context_desc = IXGB_CONTEXT_DESC(adapter->tx_ring, i);
-		buffer_info = &adapter->tx_ring.buffer_info[i];
-		WARN_ON(buffer_info->dma != 0);
-
-		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_IDE
-						| (skb->len - (hdr_len)));
-
-
-		if (++i == adapter->tx_ring.count) i = 0;
-		adapter->tx_ring.next_to_use = i;
-
-		return 1;
-	}
-
-	return 0;
-}
-
-static bool
-ixgb_tx_csum(struct ixgb_adapter *adapter, struct sk_buff *skb)
-{
-	struct ixgb_context_desc *context_desc;
-	unsigned int i;
-	u8 css, cso;
-
-	if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
-		struct ixgb_buffer *buffer_info;
-		css = skb_checksum_start_offset(skb);
-		cso = css + skb->csum_offset;
-
-		i = adapter->tx_ring.next_to_use;
-		context_desc = IXGB_CONTEXT_DESC(adapter->tx_ring, i);
-		buffer_info = &adapter->tx_ring.buffer_info[i];
-		WARN_ON(buffer_info->dma != 0);
-
-		context_desc->tucss = css;
-		context_desc->tucso = cso;
-		context_desc->tucse = 0;
-		/* zero out any previously existing data in one instruction */
-		*(u32 *)&(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_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 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 pci_dev *pdev = adapter->pdev;
-	struct ixgb_buffer *buffer_info;
-	int len = skb_headlen(skb);
-	unsigned int offset = 0, size, count = 0, i;
-	unsigned int mss = skb_shinfo(skb)->gso_size;
-	unsigned int nr_frags = skb_shinfo(skb)->nr_frags;
-	unsigned int f;
-
-	i = tx_ring->next_to_use;
-
-	while (len) {
-		buffer_info = &tx_ring->buffer_info[i];
-		size = min(len, IXGB_MAX_DATA_PER_TXD);
-		/* Workaround for premature desc write-backs
-		 * in TSO mode.  Append 4-byte sentinel desc */
-		if (unlikely(mss && !nr_frags && size == len && size > 8))
-			size -= 4;
-
-		buffer_info->length = size;
-		WARN_ON(buffer_info->dma != 0);
-		buffer_info->time_stamp = jiffies;
-		buffer_info->mapped_as_page = false;
-		buffer_info->dma = dma_map_single(&pdev->dev,
-						  skb->data + offset,
-						  size, DMA_TO_DEVICE);
-		if (dma_mapping_error(&pdev->dev, buffer_info->dma))
-			goto dma_error;
-		buffer_info->next_to_watch = 0;
-
-		len -= size;
-		offset += size;
-		count++;
-		if (len) {
-			i++;
-			if (i == tx_ring->count)
-				i = 0;
-		}
-	}
-
-	for (f = 0; f < nr_frags; f++) {
-		const skb_frag_t *frag = &skb_shinfo(skb)->frags[f];
-		len = skb_frag_size(frag);
-		offset = 0;
-
-		while (len) {
-			i++;
-			if (i == tx_ring->count)
-				i = 0;
-
-			buffer_info = &tx_ring->buffer_info[i];
-			size = min(len, IXGB_MAX_DATA_PER_TXD);
-
-			/* Workaround for premature desc write-backs
-			 * in TSO mode.  Append 4-byte sentinel desc */
-			if (unlikely(mss && (f == (nr_frags - 1))
-				     && size == len && size > 8))
-				size -= 4;
-
-			buffer_info->length = size;
-			buffer_info->time_stamp = jiffies;
-			buffer_info->mapped_as_page = true;
-			buffer_info->dma =
-				skb_frag_dma_map(&pdev->dev, frag, offset, size,
-						 DMA_TO_DEVICE);
-			if (dma_mapping_error(&pdev->dev, buffer_info->dma))
-				goto dma_error;
-			buffer_info->next_to_watch = 0;
-
-			len -= size;
-			offset += size;
-			count++;
-		}
-	}
-	tx_ring->buffer_info[i].skb = skb;
-	tx_ring->buffer_info[first].next_to_watch = i;
-
-	return count;
-
-dma_error:
-	dev_err(&pdev->dev, "TX DMA map failed\n");
-	buffer_info->dma = 0;
-	if (count)
-		count--;
-
-	while (count--) {
-		if (i==0)
-			i += tx_ring->count;
-		i--;
-		buffer_info = &tx_ring->buffer_info[i];
-		ixgb_unmap_and_free_tx_resource(adapter, buffer_info);
-	}
-
-	return 0;
-}
-
-static 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;
-	u32 cmd_type_len = adapter->tx_cmd_type;
-	u8 status = 0;
-	u8 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);
-}
-
-static int __ixgb_maybe_stop_tx(struct net_device *netdev, int size)
-{
-	struct ixgb_adapter *adapter = netdev_priv(netdev);
-	struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
-
-	netif_stop_queue(netdev);
-	/* Herbert's original patch had:
-	 *  smp_mb__after_netif_stop_queue();
-	 * but since that doesn't exist yet, just open code it. */
-	smp_mb();
-
-	/* We need to check again in a case another CPU has just
-	 * made room available. */
-	if (likely(IXGB_DESC_UNUSED(tx_ring) < size))
-		return -EBUSY;
-
-	/* A reprieve! */
-	netif_start_queue(netdev);
-	++adapter->restart_queue;
-	return 0;
-}
-
-static int ixgb_maybe_stop_tx(struct net_device *netdev,
-                              struct ixgb_desc_ring *tx_ring, int size)
-{
-	if (likely(IXGB_DESC_UNUSED(tx_ring) >= size))
-		return 0;
-	return __ixgb_maybe_stop_tx(netdev, size);
-}
-
-
-/* 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) /* skb->date */ + \
-	MAX_SKB_FRAGS * TXD_USE_COUNT(PAGE_SIZE) + 1 /* for context */ \
-	+ 1 /* one more needed for sentinel TSO workaround */
-
-static netdev_tx_t
-ixgb_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
-{
-	struct ixgb_adapter *adapter = netdev_priv(netdev);
-	unsigned int first;
-	unsigned int tx_flags = 0;
-	int vlan_id = 0;
-	int count = 0;
-	int tso;
-
-	if (test_bit(__IXGB_DOWN, &adapter->flags)) {
-		dev_kfree_skb_any(skb);
-		return NETDEV_TX_OK;
-	}
-
-	if (skb->len <= 0) {
-		dev_kfree_skb_any(skb);
-		return NETDEV_TX_OK;
-	}
-
-	if (unlikely(ixgb_maybe_stop_tx(netdev, &adapter->tx_ring,
-                     DESC_NEEDED)))
-		return NETDEV_TX_BUSY;
-
-	if (skb_vlan_tag_present(skb)) {
-		tx_flags |= IXGB_TX_FLAGS_VLAN;
-		vlan_id = skb_vlan_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 (likely(tso))
-		tx_flags |= IXGB_TX_FLAGS_TSO;
-	else if (ixgb_tx_csum(adapter, skb))
-		tx_flags |= IXGB_TX_FLAGS_CSUM;
-
-	count = ixgb_tx_map(adapter, skb, first);
-
-	if (count) {
-		ixgb_tx_queue(adapter, count, vlan_id, tx_flags);
-		/* Make sure there is space in the ring for the next send. */
-		ixgb_maybe_stop_tx(netdev, &adapter->tx_ring, DESC_NEEDED);
-
-	} else {
-		dev_kfree_skb_any(skb);
-		adapter->tx_ring.buffer_info[first].time_stamp = 0;
-		adapter->tx_ring.next_to_use = first;
-	}
-
-	return NETDEV_TX_OK;
-}
-
-/**
- * ixgb_tx_timeout - Respond to a Tx Hang
- * @netdev: network interface device structure
- * @txqueue: queue hanging (unused)
- **/
-
-static void
-ixgb_tx_timeout(struct net_device *netdev, unsigned int __always_unused txqueue)
-{
-	struct ixgb_adapter *adapter = netdev_priv(netdev);
-
-	/* Do the reset outside of interrupt context */
-	schedule_work(&adapter->tx_timeout_task);
-}
-
-static void
-ixgb_tx_timeout_task(struct work_struct *work)
-{
-	struct ixgb_adapter *adapter =
-		container_of(work, struct ixgb_adapter, tx_timeout_task);
-
-	adapter->tx_timeout_count++;
-	ixgb_down(adapter, true);
-	ixgb_up(adapter);
-}
-
-/**
- * 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(netdev);
-	int max_frame = new_mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH;
-
-	if (netif_running(netdev))
-		ixgb_down(adapter, true);
-
-	adapter->rx_buffer_len = max_frame + 8; /* + 8 for errata */
-
-	netdev->mtu = new_mtu;
-
-	if (netif_running(netdev))
-		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)
-{
-	struct net_device *netdev = adapter->netdev;
-	struct pci_dev *pdev = adapter->pdev;
-
-	/* Prevent stats update while adapter is being reset */
-	if (pci_channel_offline(pdev))
-		return;
-
-	if ((netdev->flags & IFF_PROMISC) || (netdev->flags & IFF_ALLMULTI) ||
-	   (netdev_mc_count(netdev) > IXGB_MAX_NUM_MULTICAST_ADDRESSES)) {
-		u64 multi = IXGB_READ_REG(&adapter->hw, MPRCL);
-		u32 bcast_l = IXGB_READ_REG(&adapter->hw, BPRCL);
-		u32 bcast_h = IXGB_READ_REG(&adapter->hw, BPRCH);
-		u64 bcast = ((u64)bcast_h << 32) | bcast_l;
-
-		multi |= ((u64)IXGB_READ_REG(&adapter->hw, MPRCH) << 32);
-		/* fix up multicast stats by removing broadcasts */
-		if (multi >= bcast)
-			multi -= bcast;
-
-		adapter->stats.mprcl += (multi & 0xFFFFFFFF);
-		adapter->stats.mprch += (multi >> 32);
-		adapter->stats.bprcl += bcast_l;
-		adapter->stats.bprch += bcast_h;
-	} else {
-		adapter->stats.mprcl += IXGB_READ_REG(&adapter->hw, MPRCL);
-		adapter->stats.mprch += IXGB_READ_REG(&adapter->hw, MPRCH);
-		adapter->stats.bprcl += IXGB_READ_REG(&adapter->hw, BPRCL);
-		adapter->stats.bprch += IXGB_READ_REG(&adapter->hw, BPRCH);
-	}
-	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.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 */
-
-	netdev->stats.rx_packets = adapter->stats.gprcl;
-	netdev->stats.tx_packets = adapter->stats.gptcl;
-	netdev->stats.rx_bytes = adapter->stats.gorcl;
-	netdev->stats.tx_bytes = adapter->stats.gotcl;
-	netdev->stats.multicast = adapter->stats.mprcl;
-	netdev->stats.collisions = 0;
-
-	/* ignore RLEC as it reports errors for padded (<64bytes) frames
-	 * with a length in the type/len field */
-	netdev->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;
-
-	/* see above
-	 * netdev->stats.rx_length_errors = adapter->stats.rlec;
-	 */
-
-	netdev->stats.rx_crc_errors = adapter->stats.crcerrs;
-	netdev->stats.rx_fifo_errors = adapter->stats.mpc;
-	netdev->stats.rx_missed_errors = adapter->stats.mpc;
-	netdev->stats.rx_over_errors = adapter->stats.mpc;
-
-	netdev->stats.tx_errors = 0;
-	netdev->stats.rx_frame_errors = 0;
-	netdev->stats.tx_aborted_errors = 0;
-	netdev->stats.tx_carrier_errors = 0;
-	netdev->stats.tx_fifo_errors = 0;
-	netdev->stats.tx_heartbeat_errors = 0;
-	netdev->stats.tx_window_errors = 0;
-}
-
-/**
- * ixgb_intr - Interrupt Handler
- * @irq: interrupt number
- * @data: pointer to a network interface device structure
- **/
-
-static irqreturn_t
-ixgb_intr(int irq, void *data)
-{
-	struct net_device *netdev = data;
-	struct ixgb_adapter *adapter = netdev_priv(netdev);
-	struct ixgb_hw *hw = &adapter->hw;
-	u32 icr = IXGB_READ_REG(hw, ICR);
-
-	if (unlikely(!icr))
-		return IRQ_NONE;  /* Not our interrupt */
-
-	if (unlikely(icr & (IXGB_INT_RXSEQ | IXGB_INT_LSC)))
-		if (!test_bit(__IXGB_DOWN, &adapter->flags))
-			mod_timer(&adapter->watchdog_timer, jiffies);
-
-	if (napi_schedule_prep(&adapter->napi)) {
-
-		/* Disable interrupts and register for poll. The flush
-		  of the posted write is intentionally left out.
-		*/
-
-		IXGB_WRITE_REG(&adapter->hw, IMC, ~0);
-		__napi_schedule(&adapter->napi);
-	}
-	return IRQ_HANDLED;
-}
-
-/**
- * ixgb_clean - NAPI Rx polling callback
- * @napi: napi struct pointer
- * @budget: max number of receives to clean
- **/
-
-static int
-ixgb_clean(struct napi_struct *napi, int budget)
-{
-	struct ixgb_adapter *adapter = container_of(napi, struct ixgb_adapter, napi);
-	int work_done = 0;
-
-	ixgb_clean_tx_irq(adapter);
-	ixgb_clean_rx_irq(adapter, &work_done, budget);
-
-	/* If budget not fully consumed, exit the polling mode */
-	if (work_done < budget) {
-		napi_complete_done(napi, work_done);
-		if (!test_bit(__IXGB_DOWN, &adapter->flags))
-			ixgb_irq_enable(adapter);
-	}
-
-	return work_done;
-}
-
-/**
- * ixgb_clean_tx_irq - Reclaim resources after transmit completes
- * @adapter: board private structure
- **/
-
-static bool
-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;
-	bool 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) {
-
-		rmb(); /* read buffer_info after eop_desc */
-		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);
-
-			*(u32 *)&(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;
-
-	if (unlikely(cleaned && netif_carrier_ok(netdev) &&
-		     IXGB_DESC_UNUSED(tx_ring) >= DESC_NEEDED)) {
-		/* Make sure that anybody stopping the queue after this
-		 * sees the new next_to_clean. */
-		smp_mb();
-
-		if (netif_queue_stopped(netdev) &&
-		    !(test_bit(__IXGB_DOWN, &adapter->flags))) {
-			netif_wake_queue(netdev);
-			++adapter->restart_queue;
-		}
-	}
-
-	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[eop].time_stamp &&
-		   time_after(jiffies, tx_ring->buffer_info[eop].time_stamp + HZ)
-		   && !(IXGB_READ_REG(&adapter->hw, STATUS) &
-		        IXGB_STATUS_TXOFF)) {
-			/* detected Tx unit hang */
-			netif_err(adapter, drv, adapter->netdev,
-				  "Detected Tx Unit Hang\n"
-				  "  TDH                  <%x>\n"
-				  "  TDT                  <%x>\n"
-				  "  next_to_use          <%x>\n"
-				  "  next_to_clean        <%x>\n"
-				  "buffer_info[next_to_clean]\n"
-				  "  time_stamp           <%lx>\n"
-				  "  next_to_watch        <%x>\n"
-				  "  jiffies              <%lx>\n"
-				  "  next_to_watch.status <%x>\n",
-				  IXGB_READ_REG(&adapter->hw, TDH),
-				  IXGB_READ_REG(&adapter->hw, TDT),
-				  tx_ring->next_to_use,
-				  tx_ring->next_to_clean,
-				  tx_ring->buffer_info[eop].time_stamp,
-				  eop,
-				  jiffies,
-				  eop_desc->status);
-			netif_stop_queue(netdev);
-		}
-	}
-
-	return cleaned;
-}
-
-/**
- * ixgb_rx_checksum - Receive Checksum Offload for 82597.
- * @adapter: board private structure
- * @rx_desc: receive descriptor
- * @skb: socket buffer with received data
- **/
-
-static 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_checksum_none_assert(skb);
-		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_checksum_none_assert(skb);
-		adapter->hw_csum_rx_error++;
-	} else {
-		/* TCP checksum is good */
-		skb->ip_summed = CHECKSUM_UNNECESSARY;
-		adapter->hw_csum_rx_good++;
-	}
-}
-
-/*
- * this should improve performance for small packets with large amounts
- * of reassembly being done in the stack
- */
-static void ixgb_check_copybreak(struct napi_struct *napi,
-				 struct ixgb_buffer *buffer_info,
-				 u32 length, struct sk_buff **skb)
-{
-	struct sk_buff *new_skb;
-
-	if (length > copybreak)
-		return;
-
-	new_skb = napi_alloc_skb(napi, length);
-	if (!new_skb)
-		return;
-
-	skb_copy_to_linear_data_offset(new_skb, -NET_IP_ALIGN,
-				       (*skb)->data - NET_IP_ALIGN,
-				       length + NET_IP_ALIGN);
-	/* save the skb in buffer_info as good */
-	buffer_info->skb = *skb;
-	*skb = new_skb;
-}
-
-/**
- * ixgb_clean_rx_irq - Send received data up the network stack,
- * @adapter: board private structure
- * @work_done: output pointer to amount of packets cleaned
- * @work_to_do: how much work we can complete
- **/
-
-static bool
-ixgb_clean_rx_irq(struct ixgb_adapter *adapter, int *work_done, int work_to_do)
-{
-	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;
-	u32 length;
-	unsigned int i, j;
-	int cleaned_count = 0;
-	bool 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) {
-		struct sk_buff *skb;
-		u8 status;
-
-		if (*work_done >= work_to_do)
-			break;
-
-		(*work_done)++;
-		rmb();	/* read descriptor and rx_buffer_info after status DD */
-		status = rx_desc->status;
-		skb = buffer_info->skb;
-		buffer_info->skb = NULL;
-
-		prefetch(skb->data - NET_IP_ALIGN);
-
-		if (++i == rx_ring->count)
-			i = 0;
-		next_rxd = IXGB_RX_DESC(*rx_ring, i);
-		prefetch(next_rxd);
-
-		j = i + 1;
-		if (j == rx_ring->count)
-			j = 0;
-		next2_buffer = &rx_ring->buffer_info[j];
-		prefetch(next2_buffer);
-
-		next_buffer = &rx_ring->buffer_info[i];
-
-		cleaned = true;
-		cleaned_count++;
-
-		dma_unmap_single(&pdev->dev,
-				 buffer_info->dma,
-				 buffer_info->length,
-				 DMA_FROM_DEVICE);
-		buffer_info->dma = 0;
-
-		length = le16_to_cpu(rx_desc->length);
-		rx_desc->length = 0;
-
-		if (unlikely(!(status & IXGB_RX_DESC_STATUS_EOP))) {
-
-			/* All receives must fit into a single buffer */
-
-			pr_debug("Receive packet consumed multiple buffers length<%x>\n",
-				 length);
-
-			dev_kfree_skb_irq(skb);
-			goto rxdesc_done;
-		}
-
-		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);
-			goto rxdesc_done;
-		}
-
-		ixgb_check_copybreak(&adapter->napi, buffer_info, length, &skb);
-
-		/* Good Receive */
-		skb_put(skb, length);
-
-		/* Receive Checksum Offload */
-		ixgb_rx_checksum(adapter, rx_desc, skb);
-
-		skb->protocol = eth_type_trans(skb, netdev);
-		if (status & IXGB_RX_DESC_STATUS_VP)
-			__vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
-				       le16_to_cpu(rx_desc->special));
-
-		netif_receive_skb(skb);
-
-rxdesc_done:
-		/* clean up descriptor, might be written over by hw */
-		rx_desc->status = 0;
-
-		/* return some buffers to hardware, one at a time is too slow */
-		if (unlikely(cleaned_count >= IXGB_RX_BUFFER_WRITE)) {
-			ixgb_alloc_rx_buffers(adapter, cleaned_count);
-			cleaned_count = 0;
-		}
-
-		/* use prefetched values */
-		rx_desc = next_rxd;
-		buffer_info = next_buffer;
-	}
-
-	rx_ring->next_to_clean = i;
-
-	cleaned_count = IXGB_DESC_UNUSED(rx_ring);
-	if (cleaned_count)
-		ixgb_alloc_rx_buffers(adapter, cleaned_count);
-
-	return cleaned;
-}
-
-/**
- * ixgb_alloc_rx_buffers - Replace used receive buffers
- * @adapter: address of board private structure
- * @cleaned_count: how many buffers to allocate
- **/
-
-static void
-ixgb_alloc_rx_buffers(struct ixgb_adapter *adapter, int cleaned_count)
-{
-	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;
-	long cleancount;
-
-	i = rx_ring->next_to_use;
-	buffer_info = &rx_ring->buffer_info[i];
-	cleancount = IXGB_DESC_UNUSED(rx_ring);
-
-
-	/* leave three descriptors unused */
-	while (--cleancount > 2 && cleaned_count--) {
-		/* recycle! its good for you */
-		skb = buffer_info->skb;
-		if (skb) {
-			skb_trim(skb, 0);
-			goto map_skb;
-		}
-
-		skb = netdev_alloc_skb_ip_align(netdev, adapter->rx_buffer_len);
-		if (unlikely(!skb)) {
-			/* Better luck next round */
-			adapter->alloc_rx_buff_failed++;
-			break;
-		}
-
-		buffer_info->skb = skb;
-		buffer_info->length = adapter->rx_buffer_len;
-map_skb:
-		buffer_info->dma = dma_map_single(&pdev->dev,
-		                                  skb->data,
-		                                  adapter->rx_buffer_len,
-						  DMA_FROM_DEVICE);
-		if (dma_mapping_error(&pdev->dev, buffer_info->dma)) {
-			adapter->alloc_rx_buff_failed++;
-			break;
-		}
-
-		rx_desc = IXGB_RX_DESC(*rx_ring, i);
-		rx_desc->buff_addr = cpu_to_le64(buffer_info->dma);
-		/* guarantee DD bit not set now before h/w gets descriptor
-		 * this is the rest of the workaround for h/w double
-		 * writeback. */
-		rx_desc->status = 0;
-
-
-		if (++i == rx_ring->count)
-			i = 0;
-		buffer_info = &rx_ring->buffer_info[i];
-	}
-
-	if (likely(rx_ring->next_to_use != i)) {
-		rx_ring->next_to_use = i;
-		if (unlikely(i-- == 0))
-			i = (rx_ring->count - 1);
-
-		/* 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);
-	}
-}
-
-static void
-ixgb_vlan_strip_enable(struct ixgb_adapter *adapter)
-{
-	u32 ctrl;
-
-	/* enable VLAN tag insert/strip */
-	ctrl = IXGB_READ_REG(&adapter->hw, CTRL0);
-	ctrl |= IXGB_CTRL0_VME;
-	IXGB_WRITE_REG(&adapter->hw, CTRL0, ctrl);
-}
-
-static void
-ixgb_vlan_strip_disable(struct ixgb_adapter *adapter)
-{
-	u32 ctrl;
-
-	/* disable VLAN tag insert/strip */
-	ctrl = IXGB_READ_REG(&adapter->hw, CTRL0);
-	ctrl &= ~IXGB_CTRL0_VME;
-	IXGB_WRITE_REG(&adapter->hw, CTRL0, ctrl);
-}
-
-static int
-ixgb_vlan_rx_add_vid(struct net_device *netdev, __be16 proto, u16 vid)
-{
-	struct ixgb_adapter *adapter = netdev_priv(netdev);
-	u32 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);
-	set_bit(vid, adapter->active_vlans);
-
-	return 0;
-}
-
-static int
-ixgb_vlan_rx_kill_vid(struct net_device *netdev, __be16 proto, u16 vid)
-{
-	struct ixgb_adapter *adapter = netdev_priv(netdev);
-	u32 vfta, index;
-
-	/* 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);
-	clear_bit(vid, adapter->active_vlans);
-
-	return 0;
-}
-
-static void
-ixgb_restore_vlan(struct ixgb_adapter *adapter)
-{
-	u16 vid;
-
-	for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID)
-		ixgb_vlan_rx_add_vid(adapter->netdev, htons(ETH_P_8021Q), vid);
-}
-
-/**
- * ixgb_io_error_detected - called when PCI error is detected
- * @pdev:    pointer to pci device with error
- * @state:   pci channel state after error
- *
- * This callback is called by the PCI subsystem whenever
- * a PCI bus error is detected.
- */
-static pci_ers_result_t ixgb_io_error_detected(struct pci_dev *pdev,
-                                               pci_channel_state_t state)
-{
-	struct net_device *netdev = pci_get_drvdata(pdev);
-	struct ixgb_adapter *adapter = netdev_priv(netdev);
-
-	netif_device_detach(netdev);
-
-	if (state == pci_channel_io_perm_failure)
-		return PCI_ERS_RESULT_DISCONNECT;
-
-	if (netif_running(netdev))
-		ixgb_down(adapter, true);
-
-	pci_disable_device(pdev);
-
-	/* Request a slot reset. */
-	return PCI_ERS_RESULT_NEED_RESET;
-}
-
-/**
- * ixgb_io_slot_reset - called after the pci bus has been reset.
- * @pdev: pointer to pci device with error
- *
- * This callback is called after the PCI bus has been reset.
- * Basically, this tries to restart the card from scratch.
- * This is a shortened version of the device probe/discovery code,
- * it resembles the first-half of the ixgb_probe() routine.
- */
-static pci_ers_result_t ixgb_io_slot_reset(struct pci_dev *pdev)
-{
-	struct net_device *netdev = pci_get_drvdata(pdev);
-	struct ixgb_adapter *adapter = netdev_priv(netdev);
-	u8 addr[ETH_ALEN];
-
-	if (pci_enable_device(pdev)) {
-		netif_err(adapter, probe, adapter->netdev,
-			  "Cannot re-enable PCI device after reset\n");
-		return PCI_ERS_RESULT_DISCONNECT;
-	}
-
-	/* Perform card reset only on one instance of the card */
-	if (0 != PCI_FUNC (pdev->devfn))
-		return PCI_ERS_RESULT_RECOVERED;
-
-	pci_set_master(pdev);
-
-	netif_carrier_off(netdev);
-	netif_stop_queue(netdev);
-	ixgb_reset(adapter);
-
-	/* Make sure the EEPROM is good */
-	if (!ixgb_validate_eeprom_checksum(&adapter->hw)) {
-		netif_err(adapter, probe, adapter->netdev,
-			  "After reset, the EEPROM checksum is not valid\n");
-		return PCI_ERS_RESULT_DISCONNECT;
-	}
-	ixgb_get_ee_mac_addr(&adapter->hw, addr);
-	eth_hw_addr_set(netdev, addr);
-	memcpy(netdev->perm_addr, netdev->dev_addr, netdev->addr_len);
-
-	if (!is_valid_ether_addr(netdev->perm_addr)) {
-		netif_err(adapter, probe, adapter->netdev,
-			  "After reset, invalid MAC address\n");
-		return PCI_ERS_RESULT_DISCONNECT;
-	}
-
-	return PCI_ERS_RESULT_RECOVERED;
-}
-
-/**
- * ixgb_io_resume - called when its OK to resume normal operations
- * @pdev: pointer to pci device with error
- *
- * The error recovery driver tells us that its OK to resume
- * normal operation. Implementation resembles the second-half
- * of the ixgb_probe() routine.
- */
-static void ixgb_io_resume(struct pci_dev *pdev)
-{
-	struct net_device *netdev = pci_get_drvdata(pdev);
-	struct ixgb_adapter *adapter = netdev_priv(netdev);
-
-	pci_set_master(pdev);
-
-	if (netif_running(netdev)) {
-		if (ixgb_up(adapter)) {
-			pr_err("can't bring device back up after reset\n");
-			return;
-		}
-	}
-
-	netif_device_attach(netdev);
-	mod_timer(&adapter->watchdog_timer, jiffies);
-}
-
-/* ixgb_main.c */