text: // SPDX-License-Identifier: GPL-2.0
  /*******************************************************************************
  
    Intel(R) Gigabit Ethernet Linux driver
    Copyright(c) 2007-2013 Intel Corporation.
  
    Contact Information:
    e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
    Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  
  *******************************************************************************/
  
  #include <linux/module.h>
  #include <linux/types.h>
  #include <linux/init.h>
  #include <linux/vmalloc.h>
  #include <linux/pagemap.h>
  #include <linux/netdevice.h>
  #include <linux/tcp.h>
  #ifdef NETIF_F_TSO
  #include <net/checksum.h>
  #ifdef NETIF_F_TSO6
  #include <linux/ipv6.h>
  #include <net/ip6_checksum.h>
  #endif
  #endif
  #ifdef SIOCGMIIPHY
  #include <linux/mii.h>
  #endif
  #ifdef SIOCETHTOOL
  #include <linux/ethtool.h>
  #endif
  #include <linux/if_vlan.h>
  #ifdef CONFIG_PM_RUNTIME
  #include <linux/pm_runtime.h>
  #endif /* CONFIG_PM_RUNTIME */
  
  #include <linux/if_bridge.h>
  #include "igb.h"
  #include "igb_vmdq.h"
  
  #include <linux/uio_driver.h>
  
  #if defined(DEBUG) || defined (DEBUG_DUMP) || defined (DEBUG_ICR) || defined(DEBUG_ITR)
  #define DRV_DEBUG "_debug"
  #else
  #define DRV_DEBUG
  #endif
  #define DRV_HW_PERF
  #define VERSION_SUFFIX
  
  #define MAJ 5
  #define MIN 0
  #define BUILD 6
  #define DRV_VERSION __stringify(MAJ) "." __stringify(MIN) "." __stringify(BUILD) VERSION_SUFFIX DRV_DEBUG DRV_HW_PERF
  
  char igb_driver_name[] = "igb";
  char igb_driver_version[] = DRV_VERSION;
  static const char igb_driver_string[] =
                                  "Intel(R) Gigabit Ethernet Network Driver";
  static const char igb_copyright[] =
  				"Copyright (c) 2007-2013 Intel Corporation.";
  
  const struct pci_device_id igb_pci_tbl[] = {
  	{ PCI_VDEVICE(INTEL, E1000_DEV_ID_I354_BACKPLANE_1GBPS) },
  	{ PCI_VDEVICE(INTEL, E1000_DEV_ID_I354_SGMII) },
  	{ PCI_VDEVICE(INTEL, E1000_DEV_ID_I354_BACKPLANE_2_5GBPS) },
  	{ PCI_VDEVICE(INTEL, E1000_DEV_ID_I210_COPPER) },
  	{ PCI_VDEVICE(INTEL, E1000_DEV_ID_I210_FIBER) },
  	{ PCI_VDEVICE(INTEL, E1000_DEV_ID_I210_SERDES) },
  	{ PCI_VDEVICE(INTEL, E1000_DEV_ID_I210_SGMII) },
  	{ PCI_VDEVICE(INTEL, E1000_DEV_ID_I210_COPPER_FLASHLESS) },
  	{ PCI_VDEVICE(INTEL, E1000_DEV_ID_I210_SERDES_FLASHLESS) },
  	{ PCI_VDEVICE(INTEL, E1000_DEV_ID_I211_COPPER) },
  	{ PCI_VDEVICE(INTEL, E1000_DEV_ID_I350_COPPER) },
  	{ PCI_VDEVICE(INTEL, E1000_DEV_ID_I350_FIBER) },
  	{ PCI_VDEVICE(INTEL, E1000_DEV_ID_I350_SERDES) },
  	{ PCI_VDEVICE(INTEL, E1000_DEV_ID_I350_SGMII) },
  	{ PCI_VDEVICE(INTEL, E1000_DEV_ID_82580_COPPER) },
  	{ PCI_VDEVICE(INTEL, E1000_DEV_ID_82580_FIBER) },
  	{ PCI_VDEVICE(INTEL, E1000_DEV_ID_82580_QUAD_FIBER) },
  	{ PCI_VDEVICE(INTEL, E1000_DEV_ID_82580_SERDES) },
  	{ PCI_VDEVICE(INTEL, E1000_DEV_ID_82580_SGMII) },
  	{ PCI_VDEVICE(INTEL, E1000_DEV_ID_82580_COPPER_DUAL) },
  	{ PCI_VDEVICE(INTEL, E1000_DEV_ID_DH89XXCC_SGMII) },
  	{ PCI_VDEVICE(INTEL, E1000_DEV_ID_DH89XXCC_SERDES) },
  	{ PCI_VDEVICE(INTEL, E1000_DEV_ID_DH89XXCC_BACKPLANE) },
  	{ PCI_VDEVICE(INTEL, E1000_DEV_ID_DH89XXCC_SFP) },
  	{ PCI_VDEVICE(INTEL, E1000_DEV_ID_82576) },
  	{ PCI_VDEVICE(INTEL, E1000_DEV_ID_82576_NS) },
  	{ PCI_VDEVICE(INTEL, E1000_DEV_ID_82576_NS_SERDES) },
  	{ PCI_VDEVICE(INTEL, E1000_DEV_ID_82576_FIBER) },
  	{ PCI_VDEVICE(INTEL, E1000_DEV_ID_82576_SERDES) },
  	{ PCI_VDEVICE(INTEL, E1000_DEV_ID_82576_SERDES_QUAD) },
  	{ PCI_VDEVICE(INTEL, E1000_DEV_ID_82576_QUAD_COPPER_ET2) },
  	{ PCI_VDEVICE(INTEL, E1000_DEV_ID_82576_QUAD_COPPER) },
  	{ PCI_VDEVICE(INTEL, E1000_DEV_ID_82575EB_COPPER) },
  	{ PCI_VDEVICE(INTEL, E1000_DEV_ID_82575EB_FIBER_SERDES) },
  	{ PCI_VDEVICE(INTEL, E1000_DEV_ID_82575GB_QUAD_COPPER) },
  	/* required last entry */
  	{0, }
  };
  
  //MODULE_DEVICE_TABLE(pci, igb_pci_tbl);
  static void igb_set_sriov_capability(struct igb_adapter *adapter) __attribute__((__unused__));
  void igb_reset(struct igb_adapter *);
  static int igb_setup_all_tx_resources(struct igb_adapter *);
  static int igb_setup_all_rx_resources(struct igb_adapter *);
  static void igb_free_all_tx_resources(struct igb_adapter *);
  static void igb_free_all_rx_resources(struct igb_adapter *);
  static void igb_setup_mrqc(struct igb_adapter *);
  void igb_update_stats(struct igb_adapter *);
  static int igb_probe(struct pci_dev *, const struct pci_device_id *);
  static void __devexit igb_remove(struct pci_dev *pdev);
  static int igb_sw_init(struct igb_adapter *);
  static int igb_open(struct net_device *);
  static int igb_close(struct net_device *);
  static void igb_configure(struct igb_adapter *);
  static void igb_configure_tx(struct igb_adapter *);
  static void igb_configure_rx(struct igb_adapter *);
  static void igb_clean_all_tx_rings(struct igb_adapter *);
  static void igb_clean_all_rx_rings(struct igb_adapter *);
  static void igb_clean_tx_ring(struct igb_ring *);
  static void igb_set_rx_mode(struct net_device *);
  #ifdef HAVE_TIMER_SETUP
  static void igb_update_phy_info(struct timer_list *);
  static void igb_watchdog(struct timer_list *);
  #else
  static void igb_update_phy_info(unsigned long);
  static void igb_watchdog(unsigned long);
  #endif
  static void igb_watchdog_task(struct work_struct *);
  static void igb_dma_err_task(struct work_struct *);
  #ifdef HAVE_TIMER_SETUP
  static void igb_dma_err_timer(struct timer_list *);
  #else
  static void igb_dma_err_timer(unsigned long data);
  #endif
  static netdev_tx_t igb_xmit_frame(struct sk_buff *skb, struct net_device *);
  static struct net_device_stats *igb_get_stats(struct net_device *);
  static int igb_change_mtu(struct net_device *, int);
  void igb_full_sync_mac_table(struct igb_adapter *adapter);
  static int igb_set_mac(struct net_device *, void *);
  static void igb_set_uta(struct igb_adapter *adapter);
  static irqreturn_t igb_intr(int irq, void *);
  static irqreturn_t igb_intr_msi(int irq, void *);
  static irqreturn_t igb_msix_other(int irq, void *);
  static irqreturn_t igb_msix_ring(int irq, void *);
  #ifdef IGB_DCA
  static void igb_update_dca(struct igb_q_vector *);
  static void igb_setup_dca(struct igb_adapter *);
  #endif /* IGB_DCA */
  static int igb_poll(struct napi_struct *, int);
  static bool igb_clean_tx_irq(struct igb_q_vector *);
  static bool igb_clean_rx_irq(struct igb_q_vector *, int);
  static int igb_ioctl(struct net_device *, struct ifreq *, int cmd);
  static void igb_tx_timeout(struct net_device *);
  static void igb_reset_task(struct work_struct *);
  #ifdef HAVE_VLAN_RX_REGISTER
  static void igb_vlan_mode(struct net_device *, struct vlan_group *);
  #endif
  #ifdef HAVE_VLAN_PROTOCOL
  static int igb_vlan_rx_add_vid(struct net_device *,
                                 __be16 proto, u16);
  static int igb_vlan_rx_kill_vid(struct net_device *,
                                  __be16 proto, u16);
  #elif defined HAVE_INT_NDO_VLAN_RX_ADD_VID
  #ifdef NETIF_F_HW_VLAN_CTAG_RX
  static int igb_vlan_rx_add_vid(struct net_device *,
  			       __always_unused __be16 proto, u16);
  static int igb_vlan_rx_kill_vid(struct net_device *,
  			        __always_unused __be16 proto, u16);
  #else
  static int igb_vlan_rx_add_vid(struct net_device *, u16);
  static int igb_vlan_rx_kill_vid(struct net_device *, u16);
  #endif
  #else
  static void igb_vlan_rx_add_vid(struct net_device *, u16);
  static void igb_vlan_rx_kill_vid(struct net_device *, u16);
  #endif
  static void igb_restore_vlan(struct igb_adapter *);
  void igb_rar_set(struct igb_adapter *adapter, u32 index);
  static void igb_ping_all_vfs(struct igb_adapter *);
  static void igb_msg_task(struct igb_adapter *);
  static void igb_vmm_control(struct igb_adapter *);
  static int igb_set_vf_mac(struct igb_adapter *, int, unsigned char *);
  static void igb_restore_vf_multicasts(struct igb_adapter *adapter);
  static void igb_process_mdd_event(struct igb_adapter *);
  #ifdef IFLA_VF_MAX
  static int igb_ndo_set_vf_mac( struct net_device *netdev, int vf, u8 *mac);
  static int igb_ndo_set_vf_vlan(struct net_device *netdev,
  #ifdef HAVE_VF_VLAN_PROTO
  				int vf, u16 vlan, u8 qos, __be16 vlan_proto);
  #else
  				int vf, u16 vlan, u8 qos);
  #endif
  #ifdef HAVE_VF_SPOOFCHK_CONFIGURE
  static int igb_ndo_set_vf_spoofchk(struct net_device *netdev, int vf,
  				bool setting);
  #endif
  #ifdef HAVE_VF_MIN_MAX_TXRATE
  static int igb_ndo_set_vf_bw(struct net_device *, int, int, int);
  #else /* HAVE_VF_MIN_MAX_TXRATE */
  static int igb_ndo_set_vf_bw(struct net_device *netdev, int vf, int tx_rate);
  #endif /* HAVE_VF_MIN_MAX_TXRATE */
  static int igb_ndo_get_vf_config(struct net_device *netdev, int vf,
  				 struct ifla_vf_info *ivi);
  static void igb_check_vf_rate_limit(struct igb_adapter *);
  #endif
  static int igb_vf_configure(struct igb_adapter *adapter, int vf);
  #ifdef CONFIG_PM
  #ifdef HAVE_SYSTEM_SLEEP_PM_OPS
  static int igb_suspend(struct device *dev);
  static int igb_resume(struct device *dev);
  #ifdef CONFIG_PM_RUNTIME
  static int igb_runtime_suspend(struct device *dev);
  static int igb_runtime_resume(struct device *dev);
  static int igb_runtime_idle(struct device *dev);
  #endif /* CONFIG_PM_RUNTIME */
  static const struct dev_pm_ops igb_pm_ops = {
  #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,34)
          .suspend = igb_suspend,
          .resume = igb_resume,
          .freeze = igb_suspend,
          .thaw = igb_resume,
          .poweroff = igb_suspend,
          .restore = igb_resume,
  #ifdef CONFIG_PM_RUNTIME
          .runtime_suspend = igb_runtime_suspend,
          .runtime_resume = igb_runtime_resume,
          .runtime_idle = igb_runtime_idle,
  #endif
  #else /* Linux >= 2.6.34 */
  	SET_SYSTEM_SLEEP_PM_OPS(igb_suspend, igb_resume)
  #ifdef CONFIG_PM_RUNTIME
  	SET_RUNTIME_PM_OPS(igb_runtime_suspend, igb_runtime_resume,
  			igb_runtime_idle)
  #endif /* CONFIG_PM_RUNTIME */
  #endif /* Linux version */
  };
  #else
  static int igb_suspend(struct pci_dev *pdev, pm_message_t state);
  static int igb_resume(struct pci_dev *pdev);
  #endif /* HAVE_SYSTEM_SLEEP_PM_OPS */
  #endif /* CONFIG_PM */
  #ifndef USE_REBOOT_NOTIFIER
  static void igb_shutdown(struct pci_dev *);
  #else
  static int igb_notify_reboot(struct notifier_block *, unsigned long, void *);
  static struct notifier_block igb_notifier_reboot = {
  	.notifier_call	= igb_notify_reboot,
  	.next		= NULL,
  	.priority	= 0
  };
  #endif
  #ifdef IGB_DCA
  static int igb_notify_dca(struct notifier_block *, unsigned long, void *);
  static struct notifier_block dca_notifier = {
  	.notifier_call	= igb_notify_dca,
  	.next		= NULL,
  	.priority	= 0
  };
  #endif
  #ifdef CONFIG_NET_POLL_CONTROLLER
  /* for netdump / net console */
  static void igb_netpoll(struct net_device *);
  #endif
  
  #ifdef HAVE_PCI_ERS
  static pci_ers_result_t igb_io_error_detected(struct pci_dev *,
  		     pci_channel_state_t);
  static pci_ers_result_t igb_io_slot_reset(struct pci_dev *);
  static void igb_io_resume(struct pci_dev *);
  
  static struct pci_error_handlers igb_err_handler = {
  	.error_detected = igb_io_error_detected,
  	.slot_reset = igb_io_slot_reset,
  	.resume = igb_io_resume,
  };
  #endif
  
  static void igb_init_fw(struct igb_adapter *adapter);
  static void igb_init_dmac(struct igb_adapter *adapter, u32 pba);
  
  static struct pci_driver igb_driver = {
  	.name     = igb_driver_name,
  	.id_table = igb_pci_tbl,
  	.probe    = igb_probe,
  	.remove   = __devexit_p(igb_remove),
  #ifdef CONFIG_PM
  #ifdef HAVE_SYSTEM_SLEEP_PM_OPS
  	.driver.pm = &igb_pm_ops,
  #else
  	.suspend  = igb_suspend,
  	.resume   = igb_resume,
  #endif /* HAVE_SYSTEM_SLEEP_PM_OPS */
  #endif /* CONFIG_PM */
  #ifndef USE_REBOOT_NOTIFIER
  	.shutdown = igb_shutdown,
  #endif
  #ifdef HAVE_PCI_ERS
  	.err_handler = &igb_err_handler
  #endif
  };
  
  //MODULE_AUTHOR("Intel Corporation, <e1000-devel@lists.sourceforge.net>");
  //MODULE_DESCRIPTION("Intel(R) Gigabit Ethernet Network Driver");
  //MODULE_LICENSE("GPL");
  //MODULE_VERSION(DRV_VERSION);
  
  static void igb_vfta_set(struct igb_adapter *adapter, u32 vid, bool add)
  {
  	struct e1000_hw *hw = &adapter->hw;
  	struct e1000_host_mng_dhcp_cookie *mng_cookie = &hw->mng_cookie;
  	u32 index = (vid >> E1000_VFTA_ENTRY_SHIFT) & E1000_VFTA_ENTRY_MASK;
  	u32 mask = 1 << (vid & E1000_VFTA_ENTRY_BIT_SHIFT_MASK);
  	u32 vfta;
  
  	/*
  	 * if this is the management vlan the only option is to add it in so
  	 * that the management pass through will continue to work
  	 */
  	if ((mng_cookie->status & E1000_MNG_DHCP_COOKIE_STATUS_VLAN) &&
  	    (vid == mng_cookie->vlan_id))
  		add = TRUE;
  
  	vfta = adapter->shadow_vfta[index];
  
  	if (add)
  		vfta |= mask;
  	else
  		vfta &= ~mask;
  
  	e1000_write_vfta(hw, index, vfta);
  	adapter->shadow_vfta[index] = vfta;
  }
  
  static int debug = NETIF_MSG_DRV | NETIF_MSG_PROBE;
  //module_param(debug, int, 0);
  //MODULE_PARM_DESC(debug, "Debug level (0=none, ..., 16=all)");
  
  /**
   * igb_init_module - Driver Registration Routine
   *
   * igb_init_module is the first routine called when the driver is
   * loaded. All it does is register with the PCI subsystem.
   **/
  static int __init igb_init_module(void)
  {
  	int ret;
  
  	printk(KERN_INFO "%s - version %s\n",
  	       igb_driver_string, igb_driver_version);
  
  	printk(KERN_INFO "%s\n", igb_copyright);
  #ifdef IGB_HWMON
  /* only use IGB_PROCFS if IGB_HWMON is not defined */
  #else
  #ifdef IGB_PROCFS
  	if (igb_procfs_topdir_init())
  		printk(KERN_INFO "Procfs failed to initialize topdir\n");
  #endif /* IGB_PROCFS */
  #endif /* IGB_HWMON  */
  
  #ifdef IGB_DCA
  	dca_register_notify(&dca_notifier);
  #endif
  	ret = pci_register_driver(&igb_driver);
  #ifdef USE_REBOOT_NOTIFIER
  	if (ret >= 0) {
  		register_reboot_notifier(&igb_notifier_reboot);
  	}
  #endif
  	return ret;
  }
  
  #undef module_init
  #define module_init(x) static int x(void)  __attribute__((__unused__));
  module_init(igb_init_module);
  
  /**
   * igb_exit_module - Driver Exit Cleanup Routine
   *
   * igb_exit_module is called just before the driver is removed
   * from memory.
   **/
  static void __exit igb_exit_module(void)
  {
  #ifdef IGB_DCA
  	dca_unregister_notify(&dca_notifier);
  #endif
  #ifdef USE_REBOOT_NOTIFIER
  	unregister_reboot_notifier(&igb_notifier_reboot);
  #endif
  	pci_unregister_driver(&igb_driver);
  
  #ifdef IGB_HWMON
  /* only compile IGB_PROCFS if IGB_HWMON is not defined */
  #else
  #ifdef IGB_PROCFS
  	igb_procfs_topdir_exit();
  #endif /* IGB_PROCFS */
  #endif /* IGB_HWMON */
  }
  
  #undef module_exit
  #define module_exit(x) static void x(void)  __attribute__((__unused__));
  module_exit(igb_exit_module);
  
  #define Q_IDX_82576(i) (((i & 0x1) << 3) + (i >> 1))
  /**
   * igb_cache_ring_register - Descriptor ring to register mapping
   * @adapter: board private structure to initialize
   *
   * Once we know the feature-set enabled for the device, we'll cache
   * the register offset the descriptor ring is assigned to.
   **/
  static void igb_cache_ring_register(struct igb_adapter *adapter)
  {
  	int i = 0, j = 0;
  	u32 rbase_offset = adapter->vfs_allocated_count;
  
  	switch (adapter->hw.mac.type) {
  	case e1000_82576:
  		/* The queues are allocated for virtualization such that VF 0
  		 * is allocated queues 0 and 8, VF 1 queues 1 and 9, etc.
  		 * In order to avoid collision we start at the first free queue
  		 * and continue consuming queues in the same sequence
  		 */
  		if ((adapter->rss_queues > 1) && adapter->vmdq_pools) {
  			for (; i < adapter->rss_queues; i++)
  				adapter->rx_ring[i]->reg_idx = rbase_offset +
  				                               Q_IDX_82576(i);
  		}
  	case e1000_82575:
  	case e1000_82580:
  	case e1000_i350:
  	case e1000_i354:
  	case e1000_i210:
  	case e1000_i211:
  	default:
  		for (; i < adapter->num_rx_queues; i++)
  			adapter->rx_ring[i]->reg_idx = rbase_offset + i;
  		for (; j < adapter->num_tx_queues; j++)
  			adapter->tx_ring[j]->reg_idx = rbase_offset + j;
  		break;
  	}
  }
  
  static void igb_configure_lli(struct igb_adapter *adapter)
  {
  	struct e1000_hw *hw = &adapter->hw;
  	u16 port;
  
  	/* LLI should only be enabled for MSI-X or MSI interrupts */
  	if (!adapter->msix_entries && !(adapter->flags & IGB_FLAG_HAS_MSI))
  		return;
  
  	if (adapter->lli_port) {
  		/* use filter 0 for port */
  		port = htons((u16)adapter->lli_port);
  		E1000_WRITE_REG(hw, E1000_IMIR(0),
  			(port | E1000_IMIR_PORT_IM_EN));
  		E1000_WRITE_REG(hw, E1000_IMIREXT(0),
  			(E1000_IMIREXT_SIZE_BP | E1000_IMIREXT_CTRL_BP));
  	}
  
  	if (adapter->flags & IGB_FLAG_LLI_PUSH) {
  		/* use filter 1 for push flag */
  		E1000_WRITE_REG(hw, E1000_IMIR(1),
  			(E1000_IMIR_PORT_BP | E1000_IMIR_PORT_IM_EN));
  		E1000_WRITE_REG(hw, E1000_IMIREXT(1),
  			(E1000_IMIREXT_SIZE_BP | E1000_IMIREXT_CTRL_PSH));
  	}
  
  	if (adapter->lli_size) {
  		/* use filter 2 for size */
  		E1000_WRITE_REG(hw, E1000_IMIR(2),
  			(E1000_IMIR_PORT_BP | E1000_IMIR_PORT_IM_EN));
  		E1000_WRITE_REG(hw, E1000_IMIREXT(2),
  			(adapter->lli_size | E1000_IMIREXT_CTRL_BP));
  	}
  
  }
  
  /**
   *  igb_write_ivar - configure ivar for given MSI-X vector
   *  @hw: pointer to the HW structure
   *  @msix_vector: vector number we are allocating to a given ring
   *  @index: row index of IVAR register to write within IVAR table
   *  @offset: column offset of in IVAR, should be multiple of 8
   *
   *  This function is intended to handle the writing of the IVAR register
   *  for adapters 82576 and newer.  The IVAR table consists of 2 columns,
   *  each containing an cause allocation for an Rx and Tx ring, and a
   *  variable number of rows depending on the number of queues supported.
   **/
  static void igb_write_ivar(struct e1000_hw *hw, int msix_vector,
  			   int index, int offset)
  {
  	u32 ivar = E1000_READ_REG_ARRAY(hw, E1000_IVAR0, index);
  
  	/* clear any bits that are currently set */
  	ivar &= ~((u32)0xFF << offset);
  
  	/* write vector and valid bit */
  	ivar |= (msix_vector | E1000_IVAR_VALID) << offset;
  
  	E1000_WRITE_REG_ARRAY(hw, E1000_IVAR0, index, ivar);
  }
  
  #define IGB_N0_QUEUE -1
  static void igb_assign_vector(struct igb_q_vector *q_vector, int msix_vector)
  {
  	struct igb_adapter *adapter = q_vector->adapter;
  	struct e1000_hw *hw = &adapter->hw;
  	int rx_queue = IGB_N0_QUEUE;
  	int tx_queue = IGB_N0_QUEUE;
  	u32 msixbm = 0;
  
  	if (q_vector->rx.ring)
  		rx_queue = q_vector->rx.ring->reg_idx;
  	if (q_vector->tx.ring)
  		tx_queue = q_vector->tx.ring->reg_idx;
  
  	switch (hw->mac.type) {
  	case e1000_82575:
  		/* The 82575 assigns vectors using a bitmask, which matches the
  		   bitmask for the EICR/EIMS/EIMC registers.  To assign one
  		   or more queues to a vector, we write the appropriate bits
  		   into the MSIXBM register for that vector. */
  		if (rx_queue > IGB_N0_QUEUE)
  			msixbm = E1000_EICR_RX_QUEUE0 << rx_queue;
  		if (tx_queue > IGB_N0_QUEUE)
  			msixbm |= E1000_EICR_TX_QUEUE0 << tx_queue;
  		if (!adapter->msix_entries && msix_vector == 0)
  			msixbm |= E1000_EIMS_OTHER;
  		E1000_WRITE_REG_ARRAY(hw, E1000_MSIXBM(0), msix_vector, msixbm);
  		q_vector->eims_value = msixbm;
  		break;
  	case e1000_82576:
  		/*
  		 * 82576 uses a table that essentially consists of 2 columns
  		 * with 8 rows.  The ordering is column-major so we use the
  		 * lower 3 bits as the row index, and the 4th bit as the
  		 * column offset.
  		 */
  		if (rx_queue > IGB_N0_QUEUE)
  			igb_write_ivar(hw, msix_vector,
  				       rx_queue & 0x7,
  				       (rx_queue & 0x8) << 1);
  		if (tx_queue > IGB_N0_QUEUE)
  			igb_write_ivar(hw, msix_vector,
  				       tx_queue & 0x7,
  				       ((tx_queue & 0x8) << 1) + 8);
  		q_vector->eims_value = 1 << msix_vector;
  		break;
  	case e1000_82580:
  	case e1000_i350:
  	case e1000_i354:
  	case e1000_i210:
  	case e1000_i211:
  		/*
  		 * On 82580 and newer adapters the scheme is similar to 82576
  		 * however instead of ordering column-major we have things
  		 * ordered row-major.  So we traverse the table by using
  		 * bit 0 as the column offset, and the remaining bits as the
  		 * row index.
  		 */
  		if (rx_queue > IGB_N0_QUEUE)
  			igb_write_ivar(hw, msix_vector,
  				       rx_queue >> 1,
  				       (rx_queue & 0x1) << 4);
  		if (tx_queue > IGB_N0_QUEUE)
  			igb_write_ivar(hw, msix_vector,
  				       tx_queue >> 1,
  				       ((tx_queue & 0x1) << 4) + 8);
  		q_vector->eims_value = 1 << msix_vector;
  		break;
  	default:
  		BUG();
  		break;
  	}
  
  	/* add q_vector eims value to global eims_enable_mask */
  	adapter->eims_enable_mask |= q_vector->eims_value;
  
  	/* configure q_vector to set itr on first interrupt */
  	q_vector->set_itr = 1;
  }
  
  /**
   * igb_configure_msix - Configure MSI-X hardware
   *
   * igb_configure_msix sets up the hardware to properly
   * generate MSI-X interrupts.
   **/
  static void igb_configure_msix(struct igb_adapter *adapter)
  {
  	u32 tmp;
  	int i, vector = 0;
  	struct e1000_hw *hw = &adapter->hw;
  
  	adapter->eims_enable_mask = 0;
  
  	/* set vector for other causes, i.e. link changes */
  	switch (hw->mac.type) {
  	case e1000_82575:
  		tmp = E1000_READ_REG(hw, E1000_CTRL_EXT);
  		/* enable MSI-X PBA support*/
  		tmp |= E1000_CTRL_EXT_PBA_CLR;
  
  		/* Auto-Mask interrupts upon ICR read. */
  		tmp |= E1000_CTRL_EXT_EIAME;
  		tmp |= E1000_CTRL_EXT_IRCA;
  
  		E1000_WRITE_REG(hw, E1000_CTRL_EXT, tmp);
  
  		/* enable msix_other interrupt */
  		E1000_WRITE_REG_ARRAY(hw, E1000_MSIXBM(0), vector++,
  		                      E1000_EIMS_OTHER);
  		adapter->eims_other = E1000_EIMS_OTHER;
  
  		break;
  
  	case e1000_82576:
  	case e1000_82580:
  	case e1000_i350:
  	case e1000_i354:
  	case e1000_i210:
  	case e1000_i211:
  		/* Turn on MSI-X capability first, or our settings
  		 * won't stick.  And it will take days to debug. */
  		E1000_WRITE_REG(hw, E1000_GPIE, E1000_GPIE_MSIX_MODE |
  		                E1000_GPIE_PBA | E1000_GPIE_EIAME |
  		                E1000_GPIE_NSICR);
  
  		/* enable msix_other interrupt */
  		adapter->eims_other = 1 << vector;
  		tmp = (vector++ | E1000_IVAR_VALID) << 8;
  
  		E1000_WRITE_REG(hw, E1000_IVAR_MISC, tmp);
  		break;
  	default:
  		/* do nothing, since nothing else supports MSI-X */
  		break;
  	} /* switch (hw->mac.type) */
  
  	adapter->eims_enable_mask |= adapter->eims_other;
  
  	for (i = 0; i < adapter->num_q_vectors; i++)
  		igb_assign_vector(adapter->q_vector[i], vector++);
  
  	E1000_WRITE_FLUSH(hw);
  }
  
  /**
   * igb_request_msix - Initialize MSI-X interrupts
   *
   * igb_request_msix allocates MSI-X vectors and requests interrupts from the
   * kernel.
   **/
  static int igb_request_msix(struct igb_adapter *adapter)
  {
  	struct net_device *netdev = adapter->netdev;
  	struct e1000_hw *hw = &adapter->hw;
  	int i, err = 0, vector = 0, free_vector = 0;
  
  	err = request_irq(adapter->msix_entries[vector].vector,
  	                  &igb_msix_other, 0, netdev->name, adapter);
  	if (err)
  		goto err_out;
  
  	for (i = 0; i < adapter->num_q_vectors; i++) {
  		struct igb_q_vector *q_vector = adapter->q_vector[i];
  
  		vector++;
  
  		q_vector->itr_register = hw->hw_addr + E1000_EITR(vector);
  
  		if (q_vector->rx.ring && q_vector->tx.ring)
  			sprintf(q_vector->name, "%s-TxRx-%u", netdev->name,
  			        q_vector->rx.ring->queue_index);
  		else if (q_vector->tx.ring)
  			sprintf(q_vector->name, "%s-tx-%u", netdev->name,
  			        q_vector->tx.ring->queue_index);
  		else if (q_vector->rx.ring)
  			sprintf(q_vector->name, "%s-rx-%u", netdev->name,
  			        q_vector->rx.ring->queue_index);
  		else
  			sprintf(q_vector->name, "%s-unused", netdev->name);
  
  		err = request_irq(adapter->msix_entries[vector].vector,
  		                  igb_msix_ring, 0, q_vector->name,
  		                  q_vector);
  		if (err)
  			goto err_free;
  	}
  
  	igb_configure_msix(adapter);
  	return 0;
  
  err_free:
  	/* free already assigned IRQs */
  	free_irq(adapter->msix_entries[free_vector++].vector, adapter);
  
  	vector--;
  	for (i = 0; i < vector; i++) {
  		free_irq(adapter->msix_entries[free_vector++].vector,
  			 adapter->q_vector[i]);
  	}
  err_out:
  	return err;
  }
  
  static void igb_reset_interrupt_capability(struct igb_adapter *adapter)
  {
  	if (adapter->msix_entries) {
  		pci_disable_msix(adapter->pdev);
  		kfree(adapter->msix_entries);
  		adapter->msix_entries = NULL;
  	} else if (adapter->flags & IGB_FLAG_HAS_MSI) {
  		pci_disable_msi(adapter->pdev);
  	}
  }
  
  /**
   * igb_free_q_vector - Free memory allocated for specific interrupt vector
   * @adapter: board private structure to initialize
   * @v_idx: Index of vector to be freed
   *
   * This function frees the memory allocated to the q_vector.  In addition if
   * NAPI is enabled it will delete any references to the NAPI struct prior
   * to freeing the q_vector.
   **/
  static void igb_free_q_vector(struct igb_adapter *adapter, int v_idx)
  {
  	struct igb_q_vector *q_vector = adapter->q_vector[v_idx];
  
  	if (q_vector->tx.ring)
  		adapter->tx_ring[q_vector->tx.ring->queue_index] = NULL;
  
  	if (q_vector->rx.ring)
  		adapter->tx_ring[q_vector->rx.ring->queue_index] = NULL;
  
  	adapter->q_vector[v_idx] = NULL;
  	netif_napi_del(&q_vector->napi);
  #ifndef IGB_NO_LRO
  	__skb_queue_purge(&q_vector->lrolist.active);
  #endif
  	kfree(q_vector);
  }
  
  /**
   * igb_free_q_vectors - Free memory allocated for interrupt vectors
   * @adapter: board private structure to initialize
   *
   * This function frees the memory allocated to the q_vectors.  In addition if
   * NAPI is enabled it will delete any references to the NAPI struct prior
   * to freeing the q_vector.
   **/
  static void igb_free_q_vectors(struct igb_adapter *adapter)
  {
  	int v_idx = adapter->num_q_vectors;
  
  	adapter->num_tx_queues = 0;
  	adapter->num_rx_queues = 0;
  	adapter->num_q_vectors = 0;
  
  	while (v_idx--)
  		igb_free_q_vector(adapter, v_idx);
  }
  
  /**
   * igb_clear_interrupt_scheme - reset the device to a state of no interrupts
   *
   * This function resets the device so that it has 0 rx queues, tx queues, and
   * MSI-X interrupts allocated.
   */
  static void igb_clear_interrupt_scheme(struct igb_adapter *adapter)
  {
  	igb_free_q_vectors(adapter);
  	igb_reset_interrupt_capability(adapter);
  }
  
  /**
   * igb_process_mdd_event
   * @adapter - board private structure
   *
   * Identify a malicious VF, disable the VF TX/RX queues and log a message.
   */
  static void igb_process_mdd_event(struct igb_adapter *adapter)
  {
  	struct e1000_hw *hw = &adapter->hw;
  	u32 lvmmc, vfte, vfre, mdfb;
  	u8 vf_queue;
  
  	lvmmc = E1000_READ_REG(hw, E1000_LVMMC);
  	vf_queue = lvmmc >> 29;
  
  	/* VF index cannot be bigger or equal to VFs allocated */
  	if (vf_queue >= adapter->vfs_allocated_count)
  		return;
  
  	netdev_info(adapter->netdev,
  	            "VF %d misbehaved. VF queues are disabled. "
  	            "VM misbehavior code is 0x%x\n", vf_queue, lvmmc);
  
  	/* Disable VFTE and VFRE related bits */
  	vfte = E1000_READ_REG(hw, E1000_VFTE);
  	vfte &= ~(1 << vf_queue);
  	E1000_WRITE_REG(hw, E1000_VFTE, vfte);
  
  	vfre = E1000_READ_REG(hw, E1000_VFRE);
  	vfre &= ~(1 << vf_queue);
  	E1000_WRITE_REG(hw, E1000_VFRE, vfre);
  
  	/* Disable MDFB related bit. Clear on write */
  	mdfb = E1000_READ_REG(hw, E1000_MDFB);
  	mdfb |= (1 << vf_queue);
  	E1000_WRITE_REG(hw, E1000_MDFB, mdfb);
  
  	/* Reset the specific VF */
  	E1000_WRITE_REG(hw, E1000_VTCTRL(vf_queue), E1000_VTCTRL_RST);
  }
  
  /**
   * igb_disable_mdd
   * @adapter - board private structure
   *
   * Disable MDD behavior in the HW
   **/
  static void igb_disable_mdd(struct igb_adapter *adapter)
  {
  	struct e1000_hw *hw = &adapter->hw;
  	u32 reg;
  
  	if ((hw->mac.type != e1000_i350) ||
  	    (hw->mac.type != e1000_i354))
  		return;
  
  	reg = E1000_READ_REG(hw, E1000_DTXCTL);
  	reg &= (~E1000_DTXCTL_MDP_EN);
  	E1000_WRITE_REG(hw, E1000_DTXCTL, reg);
  }
  
  /**
   * igb_enable_mdd
   * @adapter - board private structure
   *
   * Enable the HW to detect malicious driver and sends an interrupt to
   * the driver.
   **/
  static void igb_enable_mdd(struct igb_adapter *adapter)
  {
  	struct e1000_hw *hw = &adapter->hw;
  	u32 reg;
  
  	/* Only available on i350 device */
  	if (hw->mac.type != e1000_i350)
  		return;
  
  	reg = E1000_READ_REG(hw, E1000_DTXCTL);
  	reg |= E1000_DTXCTL_MDP_EN;
  	E1000_WRITE_REG(hw, E1000_DTXCTL, reg);
  }
  
  /**
   * igb_reset_sriov_capability - disable SR-IOV if enabled
   *
   * Attempt to disable single root IO virtualization capabilites present in the
   * kernel.
   **/
  static void igb_reset_sriov_capability(struct igb_adapter *adapter)
  {
  	struct pci_dev *pdev = adapter->pdev;
  	struct e1000_hw *hw = &adapter->hw;
  
  	/* reclaim resources allocated to VFs */
  	if (adapter->vf_data) {
  		if (!pci_vfs_assigned(pdev)) {
  			/*
  			 * disable iov and allow time for transactions to
  			 * clear
  			 */
  			pci_disable_sriov(pdev);
  			msleep(500);
  
  			dev_info(pci_dev_to_dev(pdev), "IOV Disabled\n");
  		} else {
  			dev_info(pci_dev_to_dev(pdev), "IOV Not Disabled\n "
  					"VF(s) are assigned to guests!\n");
  		}
  		/* Disable Malicious Driver Detection */
  		igb_disable_mdd(adapter);
  
  		/* free vf data storage */
  		kfree(adapter->vf_data);
  		adapter->vf_data = NULL;
  
  		/* switch rings back to PF ownership */
  		E1000_WRITE_REG(hw, E1000_IOVCTL,
  				E1000_IOVCTL_REUSE_VFQ);
  		E1000_WRITE_FLUSH(hw);
  		msleep(100);
  	}
  
  	adapter->vfs_allocated_count = 0;
  }
  
  /**
   * igb_set_sriov_capability - setup SR-IOV if supported
   *
   * Attempt to enable single root IO virtualization capabilites present in the
   * kernel.
   **/
  static void igb_set_sriov_capability(struct igb_adapter *adapter)
  {
  	struct pci_dev *pdev = adapter->pdev;
  	int old_vfs = 0;
  	int i;
  
  	old_vfs = pci_num_vf(pdev);
  	if (old_vfs) {
  		dev_info(pci_dev_to_dev(pdev),
  				"%d pre-allocated VFs found - override "
  				"max_vfs setting of %d\n", old_vfs,
  				adapter->vfs_allocated_count);
  		adapter->vfs_allocated_count = old_vfs;
  	}
  	/* no VFs requested, do nothing */
  	if (!adapter->vfs_allocated_count)
  		return;
  
  	/* allocate vf data storage */
  	adapter->vf_data = kcalloc(adapter->vfs_allocated_count,
  	                           sizeof(struct vf_data_storage),
  	                           GFP_KERNEL);
  
  	if (adapter->vf_data) {
  		if (!old_vfs) {
  			if (pci_enable_sriov(pdev,
  					adapter->vfs_allocated_count))
  				goto err_out;
  		}
  		for (i = 0; i < adapter->vfs_allocated_count; i++)
  			igb_vf_configure(adapter, i);
  
  		switch (adapter->hw.mac.type) {
  		case e1000_82576:
  		case e1000_i350:
  			/* Enable VM to VM loopback by default */
  			adapter->flags |= IGB_FLAG_LOOPBACK_ENABLE;
  			break;
  		default:
  			/* Currently no other hardware supports loopback */
  			break;
  		}
  
  		/* DMA Coalescing is not supported in IOV mode. */
  		if (adapter->hw.mac.type >= e1000_i350)
  		adapter->dmac = IGB_DMAC_DISABLE;
  		if (adapter->hw.mac.type < e1000_i350)
  		adapter->flags |= IGB_FLAG_DETECT_BAD_DMA;
  		return;
  
  	}
  
  err_out:
  	kfree(adapter->vf_data);
  	adapter->vf_data = NULL;
  	adapter->vfs_allocated_count = 0;
  	dev_warn(pci_dev_to_dev(pdev),
  			"Failed to initialize SR-IOV virtualization\n");
  }
  
  /**
   * igb_set_interrupt_capability - set MSI or MSI-X if supported
   *
   * Attempt to configure interrupts using the best available
   * capabilities of the hardware and kernel.
   **/
  static void igb_set_interrupt_capability(struct igb_adapter *adapter, bool msix)
  {
  	struct pci_dev *pdev = adapter->pdev;
  	int err;
  	int numvecs, i;
  
  	if (!msix)
  		adapter->int_mode = IGB_INT_MODE_MSI;
  
  	/* Number of supported queues. */
  	adapter->num_rx_queues = adapter->rss_queues;
  
  	if (adapter->vmdq_pools > 1)
  		adapter->num_rx_queues += adapter->vmdq_pools - 1;
  
  #ifdef HAVE_TX_MQ
  	if (adapter->vmdq_pools)
  		adapter->num_tx_queues = adapter->vmdq_pools;
  	else
  		adapter->num_tx_queues = adapter->num_rx_queues;
  #else
  	adapter->num_tx_queues = max_t(u32, 1, adapter->vmdq_pools);
  #endif
  
  	switch (adapter->int_mode) {
  	case IGB_INT_MODE_MSIX:
  		/* start with one vector for every rx queue */
  		numvecs = adapter->num_rx_queues;
  
  		/* if tx handler is separate add 1 for every tx queue */
  		if (!(adapter->flags & IGB_FLAG_QUEUE_PAIRS))
  			numvecs += adapter->num_tx_queues;
  
  		/* store the number of vectors reserved for queues */
  		adapter->num_q_vectors = numvecs;
  
  		/* add 1 vector for link status interrupts */
  		numvecs++;
  		adapter->msix_entries = kcalloc(numvecs,
  		                                sizeof(struct msix_entry),
  		                                GFP_KERNEL);
  		if (adapter->msix_entries) {
  			for (i = 0; i < numvecs; i++)
  				adapter->msix_entries[i].entry = i;
  
  #ifdef HAVE_PCI_ENABLE_MSIX
  			err = pci_enable_msix(pdev,
  			                      adapter->msix_entries, numvecs);
  #else
  			err = pci_enable_msix_range(pdev,
  					adapter->msix_entries,
  					numvecs,
  					numvecs);
  #endif
  			if (err == 0)
  				break;
  		}
  		/* MSI-X failed, so fall through and try MSI */
  		dev_warn(pci_dev_to_dev(pdev), "Failed to initialize MSI-X interrupts. "
  		         "Falling back to MSI interrupts.\n");
  		igb_reset_interrupt_capability(adapter);
  	case IGB_INT_MODE_MSI:
  		if (!pci_enable_msi(pdev))
  			adapter->flags |= IGB_FLAG_HAS_MSI;
  		else
  			dev_warn(pci_dev_to_dev(pdev), "Failed to initialize MSI "
  			         "interrupts.  Falling back to legacy "
  			         "interrupts.\n");
  		/* Fall through */
  	case IGB_INT_MODE_LEGACY:
  		/* disable advanced features and set number of queues to 1 */
  		igb_reset_sriov_capability(adapter);
  		adapter->vmdq_pools = 0;
  		adapter->rss_queues = 1;
  		adapter->flags |= IGB_FLAG_QUEUE_PAIRS;
  		adapter->num_rx_queues = 1;
  		adapter->num_tx_queues = 1;
  		adapter->num_q_vectors = 1;
  		/* Don't do anything; this is system default */
  		break;
  	}
  }
  
  static void igb_add_ring(struct igb_ring *ring,
  			 struct igb_ring_container *head)
  {
  	head->ring = ring;
  	head->count++;
  }
  
  /**
   * igb_alloc_q_vector - Allocate memory for a single interrupt vector
   * @adapter: board private structure to initialize
   * @v_count: q_vectors allocated on adapter, used for ring interleaving
   * @v_idx: index of vector in adapter struct
   * @txr_count: total number of Tx rings to allocate
   * @txr_idx: index of first Tx ring to allocate
   * @rxr_count: total number of Rx rings to allocate
   * @rxr_idx: index of first Rx ring to allocate
   *
   * We allocate one q_vector.  If allocation fails we return -ENOMEM.
   **/
  static int igb_alloc_q_vector(struct igb_adapter *adapter,
  			      unsigned int v_count, unsigned int v_idx,
  			      unsigned int txr_count, unsigned int txr_idx,
  			      unsigned int rxr_count, unsigned int rxr_idx)
  {
  	struct igb_q_vector *q_vector;
  	struct igb_ring *ring;
  	int ring_count, size;
  
  	/* igb only supports 1 Tx and/or 1 Rx queue per vector */
  	if (txr_count > 1 || rxr_count > 1)
  		return -ENOMEM;
  
  	ring_count = txr_count + rxr_count;
  	size = sizeof(struct igb_q_vector) +
  	       (sizeof(struct igb_ring) * ring_count);
  
  	/* allocate q_vector and rings */
  	q_vector = kzalloc(size, GFP_KERNEL);
  	if (!q_vector)
  		return -ENOMEM;
  
  #ifndef IGB_NO_LRO
  	/* initialize LRO */
  	__skb_queue_head_init(&q_vector->lrolist.active);
  
  #endif
  	/* initialize NAPI */
  	netif_napi_add(adapter->netdev, &q_vector->napi,
  		       igb_poll, 64);
  
  	/* tie q_vector and adapter together */
  	adapter->q_vector[v_idx] = q_vector;
  	q_vector->adapter = adapter;
  
  	/* initialize work limits */
  	q_vector->tx.work_limit = adapter->tx_work_limit;
  
  	/* initialize ITR configuration */
  	q_vector->itr_register = adapter->hw.hw_addr + E1000_EITR(0);
  	q_vector->itr_val = IGB_START_ITR;
  
  	/* initialize pointer to rings */
  	ring = q_vector->ring;
  
  	/* initialize ITR */
  	if (rxr_count) {
  		/* rx or rx/tx vector */
  		if (!adapter->rx_itr_setting || adapter->rx_itr_setting > 3)
  			q_vector->itr_val = adapter->rx_itr_setting;
  	} else {
  		/* tx only vector */
  		if (!adapter->tx_itr_setting || adapter->tx_itr_setting > 3)
  			q_vector->itr_val = adapter->tx_itr_setting;
  	}
  
  	if (txr_count) {
  		/* assign generic ring traits */
  		ring->dev = &adapter->pdev->dev;
  		ring->netdev = adapter->netdev;
  
  		/* configure backlink on ring */
  		ring->q_vector = q_vector;
  
  		/* update q_vector Tx values */
  		igb_add_ring(ring, &q_vector->tx);
  
  		/* For 82575, context index must be unique per ring. */
  		if (adapter->hw.mac.type == e1000_82575)
  			set_bit(IGB_RING_FLAG_TX_CTX_IDX, &ring->flags);
  
  		/* apply Tx specific ring traits */
  		ring->count = adapter->tx_ring_count;
  		ring->queue_index = txr_idx;
  
  		/* assign ring to adapter */
  		adapter->tx_ring[txr_idx] = ring;
  
  		/* push pointer to next ring */
  		ring++;
  	}
  
  	if (rxr_count) {
  		/* assign generic ring traits */
  		ring->dev = &adapter->pdev->dev;
  		ring->netdev = adapter->netdev;
  
  		/* configure backlink on ring */
  		ring->q_vector = q_vector;
  
  		/* update q_vector Rx values */
  		igb_add_ring(ring, &q_vector->rx);
  
  #ifndef HAVE_NDO_SET_FEATURES
  		/* enable rx checksum */
  		set_bit(IGB_RING_FLAG_RX_CSUM, &ring->flags);
  
  #endif
  		/* set flag indicating ring supports SCTP checksum offload */
  		if (adapter->hw.mac.type >= e1000_82576)
  			set_bit(IGB_RING_FLAG_RX_SCTP_CSUM, &ring->flags);
  
  		if ((adapter->hw.mac.type == e1000_i350) ||
  		    (adapter->hw.mac.type == e1000_i354))
  			set_bit(IGB_RING_FLAG_RX_LB_VLAN_BSWAP, &ring->flags);
  
  		/* apply Rx specific ring traits */
  		ring->count = adapter->rx_ring_count;
  		ring->queue_index = rxr_idx;
  
  		/* assign ring to adapter */
  		adapter->rx_ring[rxr_idx] = ring;
  	}
  
  	return 0;
  }
  
  /**
   * igb_alloc_q_vectors - Allocate memory for interrupt vectors
   * @adapter: board private structure to initialize
   *
   * We allocate one q_vector per queue interrupt.  If allocation fails we
   * return -ENOMEM.
   **/
  static int igb_alloc_q_vectors(struct igb_adapter *adapter)
  {
  	int q_vectors = adapter->num_q_vectors;
  	int rxr_remaining = adapter->num_rx_queues;
  	int txr_remaining = adapter->num_tx_queues;
  	int rxr_idx = 0, txr_idx = 0, v_idx = 0;
  	int err;
  
  	if (q_vectors >= (rxr_remaining + txr_remaining)) {
  		for (; rxr_remaining; v_idx++) {
  			err = igb_alloc_q_vector(adapter, q_vectors, v_idx,
  						 0, 0, 1, rxr_idx);
  
  			if (err)
  				goto err_out;
  
  			/* update counts and index */
  			rxr_remaining--;
  			rxr_idx++;
  		}
  	}
  
  	for (; v_idx < q_vectors; v_idx++) {
  		int rqpv = DIV_ROUND_UP(rxr_remaining, q_vectors - v_idx);
  		int tqpv = DIV_ROUND_UP(txr_remaining, q_vectors - v_idx);
  		err = igb_alloc_q_vector(adapter, q_vectors, v_idx,
  					 tqpv, txr_idx, rqpv, rxr_idx);
  
  		if (err)
  			goto err_out;
  
  		/* update counts and index */
  		rxr_remaining -= rqpv;
  		txr_remaining -= tqpv;
  		rxr_idx++;
  		txr_idx++;
  	}
  
  	return 0;
  
  err_out:
  	adapter->num_tx_queues = 0;
  	adapter->num_rx_queues = 0;
  	adapter->num_q_vectors = 0;
  
  	while (v_idx--)
  		igb_free_q_vector(adapter, v_idx);
  
  	return -ENOMEM;
  }
  
  /**
   * igb_init_interrupt_scheme - initialize interrupts, allocate queues/vectors
   *
   * This function initializes the interrupts and allocates all of the queues.
   **/
  static int igb_init_interrupt_scheme(struct igb_adapter *adapter, bool msix)
  {
  	struct pci_dev *pdev = adapter->pdev;
  	int err;
  
  	igb_set_interrupt_capability(adapter, msix);
  
  	err = igb_alloc_q_vectors(adapter);
  	if (err) {
  		dev_err(pci_dev_to_dev(pdev), "Unable to allocate memory for vectors\n");
  		goto err_alloc_q_vectors;
  	}
  
  	igb_cache_ring_register(adapter);
  
  	return 0;
  
  err_alloc_q_vectors:
  	igb_reset_interrupt_capability(adapter);
  	return err;
  }
  
  /**
   * igb_request_irq - initialize interrupts
   *
   * Attempts to configure interrupts using the best available
   * capabilities of the hardware and kernel.
   **/
  static int igb_request_irq(struct igb_adapter *adapter)
  {
  	struct net_device *netdev = adapter->netdev;
  	struct pci_dev *pdev = adapter->pdev;
  	int err = 0;
  
  	if (adapter->msix_entries) {
  		err = igb_request_msix(adapter);
  		if (!err)
  			goto request_done;
  		/* fall back to MSI */
  		igb_free_all_tx_resources(adapter);
  		igb_free_all_rx_resources(adapter);
  
  		igb_clear_interrupt_scheme(adapter);
  		igb_reset_sriov_capability(adapter);
  		err = igb_init_interrupt_scheme(adapter, false);
  		if (err)
  			goto request_done;
  		igb_setup_all_tx_resources(adapter);
  		igb_setup_all_rx_resources(adapter);
  		igb_configure(adapter);
  	}
  
  	igb_assign_vector(adapter->q_vector[0], 0);
  
  	if (adapter->flags & IGB_FLAG_HAS_MSI) {
  		err = request_irq(pdev->irq, &igb_intr_msi, 0,
  				  netdev->name, adapter);
  		if (!err)
  			goto request_done;
  
  		/* fall back to legacy interrupts */
  		igb_reset_interrupt_capability(adapter);
  		adapter->flags &= ~IGB_FLAG_HAS_MSI;
  	}
  
  	err = request_irq(pdev->irq, &igb_intr, IRQF_SHARED,
  			  netdev->name, adapter);
  
  	if (err)
  		dev_err(pci_dev_to_dev(pdev), "Error %d getting interrupt\n",
  			err);
  
  request_done:
  	return err;
  }
  
  static void igb_free_irq(struct igb_adapter *adapter)
  {
  	if (adapter->msix_entries) {
  		int vector = 0, i;
  
  		free_irq(adapter->msix_entries[vector++].vector, adapter);
  
  		for (i = 0; i < adapter->num_q_vectors; i++)
  			free_irq(adapter->msix_entries[vector++].vector,
  			         adapter->q_vector[i]);
  	} else {
  		free_irq(adapter->pdev->irq, adapter);
  	}
  }
  
  /**
   * igb_irq_disable - Mask off interrupt generation on the NIC
   * @adapter: board private structure
   **/
  static void igb_irq_disable(struct igb_adapter *adapter)
  {
  	struct e1000_hw *hw = &adapter->hw;
  
  	/*
  	 * we need to be careful when disabling interrupts.  The VFs are also
  	 * mapped into these registers and so clearing the bits can cause
  	 * issues on the VF drivers so we only need to clear what we set
  	 */
  	if (adapter->msix_entries) {
  		u32 regval = E1000_READ_REG(hw, E1000_EIAM);
  		E1000_WRITE_REG(hw, E1000_EIAM, regval & ~adapter->eims_enable_mask);
  		E1000_WRITE_REG(hw, E1000_EIMC, adapter->eims_enable_mask);
  		regval = E1000_READ_REG(hw, E1000_EIAC);
  		E1000_WRITE_REG(hw, E1000_EIAC, regval & ~adapter->eims_enable_mask);
  	}
  
  	E1000_WRITE_REG(hw, E1000_IAM, 0);
  	E1000_WRITE_REG(hw, E1000_IMC, ~0);
  	E1000_WRITE_FLUSH(hw);
  
  	if (adapter->msix_entries) {
  		int vector = 0, i;
  
  		synchronize_irq(adapter->msix_entries[vector++].vector);
  
  		for (i = 0; i < adapter->num_q_vectors; i++)
  			synchronize_irq(adapter->msix_entries[vector++].vector);
  	} else {
  		synchronize_irq(adapter->pdev->irq);
  	}
  }
  
  /**
   * igb_irq_enable - Enable default interrupt generation settings
   * @adapter: board private structure
   **/
  static void igb_irq_enable(struct igb_adapter *adapter)
  {
  	struct e1000_hw *hw = &adapter->hw;
  
  	if (adapter->msix_entries) {
  		u32 ims = E1000_IMS_LSC | E1000_IMS_DOUTSYNC | E1000_IMS_DRSTA;
  		u32 regval = E1000_READ_REG(hw, E1000_EIAC);
  		E1000_WRITE_REG(hw, E1000_EIAC, regval | adapter->eims_enable_mask);
  		regval = E1000_READ_REG(hw, E1000_EIAM);
  		E1000_WRITE_REG(hw, E1000_EIAM, regval | adapter->eims_enable_mask);
  		E1000_WRITE_REG(hw, E1000_EIMS, adapter->eims_enable_mask);
  		if (adapter->vfs_allocated_count) {
  			E1000_WRITE_REG(hw, E1000_MBVFIMR, 0xFF);
  			ims |= E1000_IMS_VMMB;
  			if (adapter->mdd)
  				if ((adapter->hw.mac.type == e1000_i350) ||
  				    (adapter->hw.mac.type == e1000_i354))
  				ims |= E1000_IMS_MDDET;
  		}
  		E1000_WRITE_REG(hw, E1000_IMS, ims);
  	} else {
  		E1000_WRITE_REG(hw, E1000_IMS, IMS_ENABLE_MASK |
  				E1000_IMS_DRSTA);
  		E1000_WRITE_REG(hw, E1000_IAM, IMS_ENABLE_MASK |
  				E1000_IMS_DRSTA);
  	}
  }
  
  static void igb_update_mng_vlan(struct igb_adapter *adapter)
  {
  	struct e1000_hw *hw = &adapter->hw;
  	u16 vid = adapter->hw.mng_cookie.vlan_id;
  	u16 old_vid = adapter->mng_vlan_id;
  
  	if (hw->mng_cookie.status & E1000_MNG_DHCP_COOKIE_STATUS_VLAN) {
  		/* add VID to filter table */
  		igb_vfta_set(adapter, vid, TRUE);
  		adapter->mng_vlan_id = vid;
  	} else {
  		adapter->mng_vlan_id = IGB_MNG_VLAN_NONE;
  	}
  
  	if ((old_vid != (u16)IGB_MNG_VLAN_NONE) &&
  	    (vid != old_vid) &&
  #ifdef HAVE_VLAN_RX_REGISTER
  	    !vlan_group_get_device(adapter->vlgrp, old_vid)) {
  #else
  	    !test_bit(old_vid, adapter->active_vlans)) {
  #endif
  		/* remove VID from filter table */
  		igb_vfta_set(adapter, old_vid, FALSE);
  	}
  }
  
  /**
   * igb_release_hw_control - release control of the h/w to f/w
   * @adapter: address of board private structure
   *
   * igb_release_hw_control resets CTRL_EXT:DRV_LOAD bit.
   * For ASF and Pass Through versions of f/w this means that the
   * driver is no longer loaded.
   *
   **/
  static void igb_release_hw_control(struct igb_adapter *adapter)
  {
  	struct e1000_hw *hw = &adapter->hw;
  	u32 ctrl_ext;
  
  	/* Let firmware take over control of h/w */
  	ctrl_ext = E1000_READ_REG(hw, E1000_CTRL_EXT);
  	E1000_WRITE_REG(hw, E1000_CTRL_EXT,
  			ctrl_ext & ~E1000_CTRL_EXT_DRV_LOAD);
  }
  
  /**
   * igb_get_hw_control - get control of the h/w from f/w
   * @adapter: address of board private structure
   *
   * igb_get_hw_control sets CTRL_EXT:DRV_LOAD bit.
   * For ASF and Pass Through versions of f/w this means that
   * the driver is loaded.
   *
   **/
  static void igb_get_hw_control(struct igb_adapter *adapter)
  {
  	struct e1000_hw *hw = &adapter->hw;
  	u32 ctrl_ext;
  
  	/* Let firmware know the driver has taken over */
  	ctrl_ext = E1000_READ_REG(hw, E1000_CTRL_EXT);
  	E1000_WRITE_REG(hw, E1000_CTRL_EXT,
  			ctrl_ext | E1000_CTRL_EXT_DRV_LOAD);
  }
  
  /**
   * igb_configure - configure the hardware for RX and TX
   * @adapter: private board structure
   **/
  static void igb_configure(struct igb_adapter *adapter)
  {
  	struct net_device *netdev = adapter->netdev;
  	int i;
  
  	igb_get_hw_control(adapter);
  	igb_set_rx_mode(netdev);
  
  	igb_restore_vlan(adapter);
  
  	igb_setup_tctl(adapter);
  	igb_setup_mrqc(adapter);
  	igb_setup_rctl(adapter);
  
  	igb_configure_tx(adapter);
  	igb_configure_rx(adapter);
  
  	e1000_rx_fifo_flush_82575(&adapter->hw);
  #ifdef CONFIG_NETDEVICES_MULTIQUEUE
  	if (adapter->num_tx_queues > 1)
  		netdev->features |= NETIF_F_MULTI_QUEUE;
  	else
  		netdev->features &= ~NETIF_F_MULTI_QUEUE;
  #endif
  
  	/* call igb_desc_unused which always leaves
  	 * at least 1 descriptor unused to make sure
  	 * next_to_use != next_to_clean */
  	for (i = 0; i < adapter->num_rx_queues; i++) {
  		struct igb_ring *ring = adapter->rx_ring[i];
  		igb_alloc_rx_buffers(ring, igb_desc_unused(ring));
  	}
  }
  
  /**
   * igb_power_up_link - Power up the phy/serdes link
   * @adapter: address of board private structure
   **/
  void igb_power_up_link(struct igb_adapter *adapter)
  {
  	e1000_phy_hw_reset(&adapter->hw);
  
  	if (adapter->hw.phy.media_type == e1000_media_type_copper)
  		e1000_power_up_phy(&adapter->hw);
  	else
  		e1000_power_up_fiber_serdes_link(&adapter->hw);
  }
  
  /**
   * igb_power_down_link - Power down the phy/serdes link
   * @adapter: address of board private structure
   */
  static void igb_power_down_link(struct igb_adapter *adapter)
  {
  	if (adapter->hw.phy.media_type == e1000_media_type_copper)
  		e1000_power_down_phy(&adapter->hw);
  	else
  		e1000_shutdown_fiber_serdes_link(&adapter->hw);
  }
  
  /* Detect and switch function for Media Auto Sense */
  static void igb_check_swap_media(struct igb_adapter *adapter)
  {
  	struct e1000_hw *hw = &adapter->hw;
  	u32 ctrl_ext, connsw;
  	bool swap_now = false;
  	bool link;
  
  	ctrl_ext = E1000_READ_REG(hw, E1000_CTRL_EXT);
  	connsw = E1000_READ_REG(hw, E1000_CONNSW);
  	link = igb_has_link(adapter);
  	(void) link;
  
  	/* need to live swap if current media is copper and we have fiber/serdes
  	 * to go to.
  	 */
  
  	if ((hw->phy.media_type == e1000_media_type_copper) &&
  	    (!(connsw & E1000_CONNSW_AUTOSENSE_EN))) {
  		swap_now = true;
  	} else if (!(connsw & E1000_CONNSW_SERDESD)) {
  		/* copper signal takes time to appear */
  		if (adapter->copper_tries < 2) {
  			adapter->copper_tries++;
  			connsw |= E1000_CONNSW_AUTOSENSE_CONF;
  			E1000_WRITE_REG(hw, E1000_CONNSW, connsw);
  			return;
  		} else {
  			adapter->copper_tries = 0;
  			if ((connsw & E1000_CONNSW_PHYSD) &&
  			    (!(connsw & E1000_CONNSW_PHY_PDN))) {
  				swap_now = true;
  				connsw &= ~E1000_CONNSW_AUTOSENSE_CONF;
  				E1000_WRITE_REG(hw, E1000_CONNSW, connsw);
  			}
  		}
  	}
  
  	if (swap_now) {
  		switch (hw->phy.media_type) {
  		case e1000_media_type_copper:
  			dev_info(pci_dev_to_dev(adapter->pdev),
  				 "%s:MAS: changing media to fiber/serdes\n",
  			adapter->netdev->name);
  			ctrl_ext |=
  				E1000_CTRL_EXT_LINK_MODE_PCIE_SERDES;
  			adapter->flags |= IGB_FLAG_MEDIA_RESET;
  			adapter->copper_tries = 0;
  			break;
  		case e1000_media_type_internal_serdes:
  		case e1000_media_type_fiber:
  			dev_info(pci_dev_to_dev(adapter->pdev),
  				 "%s:MAS: changing media to copper\n",
  				 adapter->netdev->name);
  			ctrl_ext &=
  				~E1000_CTRL_EXT_LINK_MODE_PCIE_SERDES;
  			adapter->flags |= IGB_FLAG_MEDIA_RESET;
  			break;
  		default:
  			/* shouldn't get here during regular operation */
  			dev_err(pci_dev_to_dev(adapter->pdev),
  				"%s:AMS: Invalid media type found, returning\n",
  				adapter->netdev->name);
  			break;
  		}
  		E1000_WRITE_REG(hw, E1000_CTRL_EXT, ctrl_ext);
  	}
  }
  
  #ifdef HAVE_I2C_SUPPORT
  /*  igb_get_i2c_data - Reads the I2C SDA data bit
   *  @hw: pointer to hardware structure
   *  @i2cctl: Current value of I2CCTL register
   *
   *  Returns the I2C data bit value
   */
  static int igb_get_i2c_data(void *data)
  {
  	struct igb_adapter *adapter = data;
  	struct e1000_hw *hw = &adapter->hw;
  	s32 i2cctl = E1000_READ_REG(hw, E1000_I2CPARAMS);
  
  	return (i2cctl & E1000_I2C_DATA_IN) != 0;
  }
  
  /* igb_set_i2c_data - Sets the I2C data bit
   *  @data: pointer to hardware structure
   *  @state: I2C data value (0 or 1) to set
   *
   *  Sets the I2C data bit
   */
  static void igb_set_i2c_data(void *data, int state)
  {
  	struct igb_adapter *adapter = data;
  	struct e1000_hw *hw = &adapter->hw;
  	s32 i2cctl = E1000_READ_REG(hw, E1000_I2CPARAMS);
  
  	if (state)
  		i2cctl |= E1000_I2C_DATA_OUT;
  	else
  		i2cctl &= ~E1000_I2C_DATA_OUT;
  
  	i2cctl &= ~E1000_I2C_DATA_OE_N;
  	i2cctl |= E1000_I2C_CLK_OE_N;
  
  	E1000_WRITE_REG(hw, E1000_I2CPARAMS, i2cctl);
  	E1000_WRITE_FLUSH(hw);
  
  }
  
  /* igb_set_i2c_clk - Sets the I2C SCL clock
   *  @data: pointer to hardware structure
   *  @state: state to set clock
   *
   *  Sets the I2C clock line to state
   */
  static void igb_set_i2c_clk(void *data, int state)
  {
  	struct igb_adapter *adapter = data;
  	struct e1000_hw *hw = &adapter->hw;
  	s32 i2cctl = E1000_READ_REG(hw, E1000_I2CPARAMS);
  
  	if (state) {
  		i2cctl |= E1000_I2C_CLK_OUT;
  		i2cctl &= ~E1000_I2C_CLK_OE_N;
  	} else {
  		i2cctl &= ~E1000_I2C_CLK_OUT;
  		i2cctl &= ~E1000_I2C_CLK_OE_N;
  	}
  	E1000_WRITE_REG(hw, E1000_I2CPARAMS, i2cctl);
  	E1000_WRITE_FLUSH(hw);
  }
  
  /* igb_get_i2c_clk - Gets the I2C SCL clock state
   *  @data: pointer to hardware structure
   *
   *  Gets the I2C clock state
   */
  static int igb_get_i2c_clk(void *data)
  {
  	struct igb_adapter *adapter = data;
  	struct e1000_hw *hw = &adapter->hw;
  	s32 i2cctl = E1000_READ_REG(hw, E1000_I2CPARAMS);
  
  	return (i2cctl & E1000_I2C_CLK_IN) != 0;
  }
  
  static const struct i2c_algo_bit_data igb_i2c_algo = {
  	.setsda		= igb_set_i2c_data,
  	.setscl		= igb_set_i2c_clk,
  	.getsda		= igb_get_i2c_data,
  	.getscl		= igb_get_i2c_clk,
  	.udelay		= 5,
  	.timeout	= 20,
  };
  
  /*  igb_init_i2c - Init I2C interface
   *  @adapter: pointer to adapter structure
   *
   */
  static s32 igb_init_i2c(struct igb_adapter *adapter)
  {
  	s32 status = E1000_SUCCESS;
  
  	/* I2C interface supported on i350 devices */
  	if (adapter->hw.mac.type != e1000_i350)
  		return E1000_SUCCESS;
  
  	/* Initialize the i2c bus which is controlled by the registers.
  	 * This bus will use the i2c_algo_bit structue that implements
  	 * the protocol through toggling of the 4 bits in the register.
  	 */
  	adapter->i2c_adap.owner = THIS_MODULE;
  	adapter->i2c_algo = igb_i2c_algo;
  	adapter->i2c_algo.data = adapter;
  	adapter->i2c_adap.algo_data = &adapter->i2c_algo;
  	adapter->i2c_adap.dev.parent = &adapter->pdev->dev;
  	strlcpy(adapter->i2c_adap.name, "igb BB",
  		sizeof(adapter->i2c_adap.name));
  	status = i2c_bit_add_bus(&adapter->i2c_adap);
  	return status;
  }
  
  #endif /* HAVE_I2C_SUPPORT */
  /**
   * igb_up - Open the interface and prepare it to handle traffic
   * @adapter: board private structure
   **/
  int igb_up(struct igb_adapter *adapter)
  {
  	struct e1000_hw *hw = &adapter->hw;
  	int i;
  
  	/* hardware has been reset, we need to reload some things */
  	igb_configure(adapter);
  
  	clear_bit(__IGB_DOWN, &adapter->state);
  
  	for (i = 0; i < adapter->num_q_vectors; i++)
  		napi_enable(&(adapter->q_vector[i]->napi));
  
  	if (adapter->msix_entries)
  		igb_configure_msix(adapter);
  	else
  		igb_assign_vector(adapter->q_vector[0], 0);
  
  	igb_configure_lli(adapter);
  
  	/* Clear any pending interrupts. */
  	E1000_READ_REG(hw, E1000_ICR);
  	igb_irq_enable(adapter);
  
  	/* notify VFs that reset has been completed */
  	if (adapter->vfs_allocated_count) {
  		u32 reg_data = E1000_READ_REG(hw, E1000_CTRL_EXT);
  		reg_data |= E1000_CTRL_EXT_PFRSTD;
  		E1000_WRITE_REG(hw, E1000_CTRL_EXT, reg_data);
  	}
  
  	netif_tx_start_all_queues(adapter->netdev);
  
  	if (adapter->flags & IGB_FLAG_DETECT_BAD_DMA)
  		schedule_work(&adapter->dma_err_task);
  	/* start the watchdog. */
  	hw->mac.get_link_status = 1;
  	schedule_work(&adapter->watchdog_task);
  
  	if ((adapter->flags & IGB_FLAG_EEE) &&
  	    (!hw->dev_spec._82575.eee_disable))
  		adapter->eee_advert = MDIO_EEE_100TX | MDIO_EEE_1000T;
  
  	return 0;
  }
  
  void igb_down(struct igb_adapter *adapter)
  {
  	struct net_device *netdev = adapter->netdev;
  	struct e1000_hw *hw = &adapter->hw;
  	u32 tctl, rctl;
  	int i;
  
  	/* signal that we're down so the interrupt handler does not
  	 * reschedule our watchdog timer */
  	set_bit(__IGB_DOWN, &adapter->state);
  
  	/* disable receives in the hardware */
  	rctl = E1000_READ_REG(hw, E1000_RCTL);
  	E1000_WRITE_REG(hw, E1000_RCTL, rctl & ~E1000_RCTL_EN);
  	/* flush and sleep below */
  
  	netif_tx_stop_all_queues(netdev);
  
  	/* disable transmits in the hardware */
  	tctl = E1000_READ_REG(hw, E1000_TCTL);
  	tctl &= ~E1000_TCTL_EN;
  	E1000_WRITE_REG(hw, E1000_TCTL, tctl);
  	/* flush both disables and wait for them to finish */
  	E1000_WRITE_FLUSH(hw);
  	usleep_range(10000, 20000);
  
  	for (i = 0; i < adapter->num_q_vectors; i++)
  		napi_disable(&(adapter->q_vector[i]->napi));
  
  	igb_irq_disable(adapter);
  
  	adapter->flags &= ~IGB_FLAG_NEED_LINK_UPDATE;
  
  	del_timer_sync(&adapter->watchdog_timer);
  	if (adapter->flags & IGB_FLAG_DETECT_BAD_DMA)
  		del_timer_sync(&adapter->dma_err_timer);
  	del_timer_sync(&adapter->phy_info_timer);
  
  	netif_carrier_off(netdev);
  
  	/* record the stats before reset*/
  	igb_update_stats(adapter);
  
  	adapter->link_speed = 0;
  	adapter->link_duplex = 0;
  
  #ifdef HAVE_PCI_ERS
  	if (!pci_channel_offline(adapter->pdev))
  		igb_reset(adapter);
  #else
  	igb_reset(adapter);
  #endif
  	igb_clean_all_tx_rings(adapter);
  	igb_clean_all_rx_rings(adapter);
  #ifdef IGB_DCA
  	/* since we reset the hardware DCA settings were cleared */
  	igb_setup_dca(adapter);
  #endif
  }
  
  void igb_reinit_locked(struct igb_adapter *adapter)
  {
  	WARN_ON(in_interrupt());
  	while (test_and_set_bit(__IGB_RESETTING, &adapter->state))
  		usleep_range(1000, 2000);
  	igb_down(adapter);
  	igb_up(adapter);
  	clear_bit(__IGB_RESETTING, &adapter->state);
  }
  
  /**
   * igb_enable_mas - Media Autosense re-enable after swap
   *
   * @adapter: adapter struct
   **/
  static s32  igb_enable_mas(struct igb_adapter *adapter)
  {
  	struct e1000_hw *hw = &adapter->hw;
  	u32 connsw;
  	s32 ret_val = E1000_SUCCESS;
  
  	connsw = E1000_READ_REG(hw, E1000_CONNSW);
  	if (hw->phy.media_type == e1000_media_type_copper) {
  		/* configure for SerDes media detect */
  		if (!(connsw & E1000_CONNSW_SERDESD)) {
  			connsw |= E1000_CONNSW_ENRGSRC;
  			connsw |= E1000_CONNSW_AUTOSENSE_EN;
  			E1000_WRITE_REG(hw, E1000_CONNSW, connsw);
  			E1000_WRITE_FLUSH(hw);
  		} else if (connsw & E1000_CONNSW_SERDESD) {
  			/* already SerDes, no need to enable anything */
  			return ret_val;
  		} else {
  			dev_info(pci_dev_to_dev(adapter->pdev),
  			"%s:MAS: Unable to configure feature, disabling..\n",
  			adapter->netdev->name);
  			adapter->flags &= ~IGB_FLAG_MAS_ENABLE;
  		}
  	}
  	return ret_val;
  }
  
  void igb_reset(struct igb_adapter *adapter)
  {
  	struct pci_dev *pdev = adapter->pdev;
  	struct e1000_hw *hw = &adapter->hw;
  	struct e1000_mac_info *mac = &hw->mac;
  	struct e1000_fc_info *fc = &hw->fc;
  	u32 pba = 0, tx_space, min_tx_space, min_rx_space, hwm;
  
  	/* Repartition Pba for greater than 9k mtu
  	 * To take effect CTRL.RST is required.
  	 */
  	switch (mac->type) {
  	case e1000_i350:
  	case e1000_82580:
  	case e1000_i354:
  		pba = E1000_READ_REG(hw, E1000_RXPBS);
  		pba = e1000_rxpbs_adjust_82580(pba);
  		break;
  	case e1000_82576:
  		pba = E1000_READ_REG(hw, E1000_RXPBS);
  		pba &= E1000_RXPBS_SIZE_MASK_82576;
  		break;
  	case e1000_82575:
  	case e1000_i210:
  	case e1000_i211:
  	default:
  		pba = E1000_PBA_34K;
  		break;
  	}
  
  	if ((adapter->max_frame_size > ETH_FRAME_LEN + ETH_FCS_LEN) &&
  	    (mac->type < e1000_82576)) {
  		/* adjust PBA for jumbo frames */
  		E1000_WRITE_REG(hw, E1000_PBA, pba);
  
  		/* To maintain wire speed transmits, the Tx FIFO should be
  		 * large enough to accommodate two full transmit packets,
  		 * rounded up to the next 1KB and expressed in KB.  Likewise,
  		 * the Rx FIFO should be large enough to accommodate at least
  		 * one full receive packet and is similarly rounded up and
  		 * expressed in KB. */
  		pba = E1000_READ_REG(hw, E1000_PBA);
  		/* upper 16 bits has Tx packet buffer allocation size in KB */
  		tx_space = pba >> 16;
  		/* lower 16 bits has Rx packet buffer allocation size in KB */
  		pba &= 0xffff;
  		/* the tx fifo also stores 16 bytes of information about the tx
  		 * but don't include ethernet FCS because hardware appends it */
  		min_tx_space = (adapter->max_frame_size +
  				sizeof(union e1000_adv_tx_desc) -
  				ETH_FCS_LEN) * 2;
  		min_tx_space = ALIGN(min_tx_space, 1024);
  		min_tx_space >>= 10;
  		/* software strips receive CRC, so leave room for it */
  		min_rx_space = adapter->max_frame_size;
  		min_rx_space = ALIGN(min_rx_space, 1024);
  		min_rx_space >>= 10;
  
  		/* If current Tx allocation is less than the min Tx FIFO size,
  		 * and the min Tx FIFO size is less than the current Rx FIFO
  		 * allocation, take space away from current Rx allocation */
  		if (tx_space < min_tx_space &&
  		    ((min_tx_space - tx_space) < pba)) {
  			pba = pba - (min_tx_space - tx_space);
  
  			/* if short on rx space, rx wins and must trump tx
  			 * adjustment */
  			if (pba < min_rx_space)
  				pba = min_rx_space;
  		}
  		E1000_WRITE_REG(hw, E1000_PBA, pba);
  	}
  
  	/* flow control settings */
  	/* The high water mark must be low enough to fit one full frame
  	 * (or the size used for early receive) above it in the Rx FIFO.
  	 * Set it to the lower of:
  	 * - 90% of the Rx FIFO size, or
  	 * - the full Rx FIFO size minus one full frame */
  	hwm = min(((pba << 10) * 9 / 10),
  			((pba << 10) - 2 * adapter->max_frame_size));
  
  	fc->high_water = hwm & 0xFFFFFFF0;	/* 16-byte granularity */
  	fc->low_water = fc->high_water - 16;
  	fc->pause_time = 0xFFFF;
  	fc->send_xon = 1;
  	fc->current_mode = fc->requested_mode;
  
  	/* disable receive for all VFs and wait one second */
  	if (adapter->vfs_allocated_count) {
  		int i;
  		/*
  		 * Clear all flags except indication that the PF has set
  		 * the VF MAC addresses administratively
  		 */
  		for (i = 0 ; i < adapter->vfs_allocated_count; i++)
  			adapter->vf_data[i].flags &= IGB_VF_FLAG_PF_SET_MAC;
  
  		/* ping all the active vfs to let them know we are going down */
  		igb_ping_all_vfs(adapter);
  
  		/* disable transmits and receives */
  		E1000_WRITE_REG(hw, E1000_VFRE, 0);
  		E1000_WRITE_REG(hw, E1000_VFTE, 0);
  	}
  
  	/* Allow time for pending master requests to run */
  	e1000_reset_hw(hw);
  	E1000_WRITE_REG(hw, E1000_WUC, 0);
  
  	if (adapter->flags & IGB_FLAG_MEDIA_RESET) {
  		e1000_setup_init_funcs(hw, TRUE);
  		igb_check_options(adapter);
  		e1000_get_bus_info(hw);
  		adapter->flags &= ~IGB_FLAG_MEDIA_RESET;
  	}
  	if (adapter->flags & IGB_FLAG_MAS_ENABLE) {
  		if (igb_enable_mas(adapter))
  			dev_err(pci_dev_to_dev(pdev),
  				"Error enabling Media Auto Sense\n");
  	}
  	if (e1000_init_hw(hw))
  		dev_err(pci_dev_to_dev(pdev), "Hardware Error\n");
  
  	/*
  	 * Flow control settings reset on hardware reset, so guarantee flow
  	 * control is off when forcing speed.
  	 */
  	if (!hw->mac.autoneg)
  		e1000_force_mac_fc(hw);
  
  	igb_init_dmac(adapter, pba);
  	/* Re-initialize the thermal sensor on i350 devices. */
  	if (mac->type == e1000_i350 && hw->bus.func == 0) {
  		/*
  		 * If present, re-initialize the external thermal sensor
  		 * interface.
  		 */
  		if (adapter->ets)
  			e1000_set_i2c_bb(hw);
  		e1000_init_thermal_sensor_thresh(hw);
  	}
  
  	/*Re-establish EEE setting */
  	if (hw->phy.media_type == e1000_media_type_copper) {
  		switch (mac->type) {
  		case e1000_i350:
  		case e1000_i210:
  		case e1000_i211:
  			e1000_set_eee_i350(hw);
  			break;
  		case e1000_i354:
  			e1000_set_eee_i354(hw);
  			break;
  		default:
  			break;
  		}
  	}
  
  	if (!netif_running(adapter->netdev))
  		igb_power_down_link(adapter);
  
  	igb_update_mng_vlan(adapter);
  
  	/* Enable h/w to recognize an 802.1Q VLAN Ethernet packet */
  	E1000_WRITE_REG(hw, E1000_VET, ETHERNET_IEEE_VLAN_TYPE);
  
  
  #ifdef HAVE_PTP_1588_CLOCK
  	/* Re-enable PTP, where applicable. */
  	igb_ptp_reset(adapter);
  #endif /* HAVE_PTP_1588_CLOCK */
  
  	e1000_get_phy_info(hw);
  
  	adapter->devrc++;
  }
  
  #ifdef HAVE_NDO_SET_FEATURES
  static kni_netdev_features_t igb_fix_features(struct net_device *netdev,
  					      kni_netdev_features_t features)
  {
  	/*
  	 * Since there is no support for separate tx vlan accel
  	 * enabled make sure tx flag is cleared if rx is.
  	 */
  #ifdef NETIF_F_HW_VLAN_CTAG_RX
  	if (!(features & NETIF_F_HW_VLAN_CTAG_RX))
  		features &= ~NETIF_F_HW_VLAN_CTAG_TX;
  #else
  	if (!(features & NETIF_F_HW_VLAN_RX))
  		features &= ~NETIF_F_HW_VLAN_TX;
  #endif
  
  	/* If Rx checksum is disabled, then LRO should also be disabled */
  	if (!(features & NETIF_F_RXCSUM))
  		features &= ~NETIF_F_LRO;
  
  	return features;
  }
  
  static int igb_set_features(struct net_device *netdev,
  			    kni_netdev_features_t features)
  {
  	u32 changed = netdev->features ^ features;
  
  #ifdef NETIF_F_HW_VLAN_CTAG_RX
  	if (changed & NETIF_F_HW_VLAN_CTAG_RX)
  #else
  	if (changed & NETIF_F_HW_VLAN_RX)
  #endif
  		igb_vlan_mode(netdev, features);
  
  	return 0;
  }
  
  #ifdef NTF_SELF
  #ifdef USE_CONST_DEV_UC_CHAR
  static int igb_ndo_fdb_add(struct ndmsg *ndm, struct nlattr *tb[],
  			   struct net_device *dev,
  			   const unsigned char *addr,
  #ifdef HAVE_NDO_FDB_ADD_VID
  			   u16 vid,
  #endif
  #ifdef HAVE_NDO_FDB_ADD_EXTACK
  			   u16 flags,
  			   struct netlink_ext_ack *extack)
  #else
  			   u16 flags)
  #endif
  
  #else
  static int igb_ndo_fdb_add(struct ndmsg *ndm,
  			   struct net_device *dev,
  			   unsigned char *addr,
  			   u16 flags)
  #endif
  {
  	struct igb_adapter *adapter = netdev_priv(dev);
  	struct e1000_hw *hw = &adapter->hw;
  	int err;
  
  	if (!(adapter->vfs_allocated_count))
  		return -EOPNOTSUPP;
  
  	/* Hardware does not support aging addresses so if a
  	 * ndm_state is given only allow permanent addresses
  	 */
  	if (ndm->ndm_state && !(ndm->ndm_state & NUD_PERMANENT)) {
  		pr_info("%s: FDB only supports static addresses\n",
  			igb_driver_name);
  		return -EINVAL;
  	}
  
  	if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr)) {
  		u32 rar_uc_entries = hw->mac.rar_entry_count -
  					(adapter->vfs_allocated_count + 1);
  
  		if (netdev_uc_count(dev) < rar_uc_entries)
  			err = dev_uc_add_excl(dev, addr);
  		else
  			err = -ENOMEM;
  	} else if (is_multicast_ether_addr(addr)) {
  		err = dev_mc_add_excl(dev, addr);
  	} else {
  		err = -EINVAL;
  	}
  
  	/* Only return duplicate errors if NLM_F_EXCL is set */
  	if (err == -EEXIST && !(flags & NLM_F_EXCL))
  		err = 0;
  
  	return err;
  }
  
  #ifndef USE_DEFAULT_FDB_DEL_DUMP
  #ifdef USE_CONST_DEV_UC_CHAR
  static int igb_ndo_fdb_del(struct ndmsg *ndm,
  			   struct net_device *dev,
  			   const unsigned char *addr)
  #else
  static int igb_ndo_fdb_del(struct ndmsg *ndm,
  			   struct net_device *dev,
  			   unsigned char *addr)
  #endif
  {
  	struct igb_adapter *adapter = netdev_priv(dev);
  	int err = -EOPNOTSUPP;
  
  	if (ndm->ndm_state & NUD_PERMANENT) {
  		pr_info("%s: FDB only supports static addresses\n",
  			igb_driver_name);
  		return -EINVAL;
  	}
  
  	if (adapter->vfs_allocated_count) {
  		if (is_unicast_ether_addr(addr))
  			err = dev_uc_del(dev, addr);
  		else if (is_multicast_ether_addr(addr))
  			err = dev_mc_del(dev, addr);
  		else
  			err = -EINVAL;
  	}
  
  	return err;
  }
  
  static int igb_ndo_fdb_dump(struct sk_buff *skb,
  			    struct netlink_callback *cb,
  			    struct net_device *dev,
  			    int idx)
  {
  	struct igb_adapter *adapter = netdev_priv(dev);
  
  	if (adapter->vfs_allocated_count)
  		idx = ndo_dflt_fdb_dump(skb, cb, dev, idx);
  
  	return idx;
  }
  #endif /* USE_DEFAULT_FDB_DEL_DUMP */
  
  #ifdef HAVE_BRIDGE_ATTRIBS
  #ifdef HAVE_NDO_BRIDGE_SET_DEL_LINK_FLAGS
  static int igb_ndo_bridge_setlink(struct net_device *dev,
  				  struct nlmsghdr *nlh,
  #ifdef HAVE_NDO_BRIDGE_SETLINK_EXTACK
  				  u16 flags, struct netlink_ext_ack *extack)
  #else
  				  u16 flags)
  #endif
  
  #else
  static int igb_ndo_bridge_setlink(struct net_device *dev,
  				  struct nlmsghdr *nlh)
  #endif /* HAVE_NDO_BRIDGE_SET_DEL_LINK_FLAGS */
  {
  	struct igb_adapter *adapter = netdev_priv(dev);
  	struct e1000_hw *hw = &adapter->hw;
  	struct nlattr *attr, *br_spec;
  	int rem;
  
  	if (!(adapter->vfs_allocated_count))
  		return -EOPNOTSUPP;
  
  	switch (adapter->hw.mac.type) {
  	case e1000_82576:
  	case e1000_i350:
  	case e1000_i354:
  		break;
  	default:
  		return -EOPNOTSUPP;
  	}
  
  	br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
  
  	nla_for_each_nested(attr, br_spec, rem) {
  		__u16 mode;
  
  		if (nla_type(attr) != IFLA_BRIDGE_MODE)
  			continue;
  
  		mode = nla_get_u16(attr);
  		if (mode == BRIDGE_MODE_VEPA) {
  			e1000_vmdq_set_loopback_pf(hw, 0);
  			adapter->flags &= ~IGB_FLAG_LOOPBACK_ENABLE;
  		} else if (mode == BRIDGE_MODE_VEB) {
  			e1000_vmdq_set_loopback_pf(hw, 1);
  			adapter->flags |= IGB_FLAG_LOOPBACK_ENABLE;
  		} else
  			return -EINVAL;
  
  		netdev_info(adapter->netdev, "enabling bridge mode: %s\n",
  			    mode == BRIDGE_MODE_VEPA ? "VEPA" : "VEB");
  	}
  
  	return 0;
  }
  
  #ifdef HAVE_BRIDGE_FILTER
  #ifdef HAVE_NDO_BRIDGE_GETLINK_NLFLAGS
  static int igb_ndo_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
  				  struct net_device *dev, u32 filter_mask,
  				  int nlflags)
  #else
  static int igb_ndo_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
  				  struct net_device *dev, u32 filter_mask)
  #endif /* HAVE_NDO_BRIDGE_GETLINK_NLFLAGS */
  #else
  static int igb_ndo_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
  				  struct net_device *dev)
  #endif
  {
  	struct igb_adapter *adapter = netdev_priv(dev);
  	u16 mode;
  
  	if (!(adapter->vfs_allocated_count))
  		return -EOPNOTSUPP;
  
  	if (adapter->flags & IGB_FLAG_LOOPBACK_ENABLE)
  		mode = BRIDGE_MODE_VEB;
  	else
  		mode = BRIDGE_MODE_VEPA;
  
  #ifdef HAVE_NDO_DFLT_BRIDGE_ADD_MASK
  #ifdef HAVE_NDO_BRIDGE_GETLINK_NLFLAGS
  #ifdef HAVE_NDO_BRIDGE_GETLINK_FILTER_MASK_VLAN_FILL
  	return ndo_dflt_bridge_getlink(skb, pid, seq, dev, mode, 0, 0,
  				nlflags, filter_mask, NULL);
  #else
  	return ndo_dflt_bridge_getlink(skb, pid, seq, dev, mode, 0, 0, nlflags);
  #endif /* HAVE_NDO_BRIDGE_GETLINK_FILTER_MASK_VLAN_FILL */
  #else
  	return ndo_dflt_bridge_getlink(skb, pid, seq, dev, mode, 0, 0);
  #endif /* HAVE_NDO_BRIDGE_GETLINK_NLFLAGS */
  #else
  	return ndo_dflt_bridge_getlink(skb, pid, seq, dev, mode);
  #endif /* HAVE_NDO_DFLT_BRIDGE_ADD_MASK */
  }
  #endif /* HAVE_BRIDGE_ATTRIBS */
  #endif /* NTF_SELF */
  
  #endif /* HAVE_NDO_SET_FEATURES */
  #ifdef HAVE_NET_DEVICE_OPS
  static const struct net_device_ops igb_netdev_ops = {
  	.ndo_open		= igb_open,
  	.ndo_stop		= igb_close,
  	.ndo_start_xmit		= igb_xmit_frame,
  	.ndo_get_stats		= igb_get_stats,
  	.ndo_set_rx_mode	= igb_set_rx_mode,
  	.ndo_set_mac_address	= igb_set_mac,
  	.ndo_change_mtu		= igb_change_mtu,
  	.ndo_do_ioctl		= igb_ioctl,
  	.ndo_tx_timeout		= igb_tx_timeout,
  	.ndo_validate_addr	= eth_validate_addr,
  	.ndo_vlan_rx_add_vid	= igb_vlan_rx_add_vid,
  	.ndo_vlan_rx_kill_vid	= igb_vlan_rx_kill_vid,
  #ifdef IFLA_VF_MAX
  	.ndo_set_vf_mac		= igb_ndo_set_vf_mac,
  	.ndo_set_vf_vlan	= igb_ndo_set_vf_vlan,
  #ifdef HAVE_VF_MIN_MAX_TXRATE
  	.ndo_set_vf_rate	= igb_ndo_set_vf_bw,
  #else /* HAVE_VF_MIN_MAX_TXRATE */
  	.ndo_set_vf_tx_rate	= igb_ndo_set_vf_bw,
  #endif /* HAVE_VF_MIN_MAX_TXRATE */
  	.ndo_get_vf_config	= igb_ndo_get_vf_config,
  #ifdef HAVE_VF_SPOOFCHK_CONFIGURE
  	.ndo_set_vf_spoofchk	= igb_ndo_set_vf_spoofchk,
  #endif /* HAVE_VF_SPOOFCHK_CONFIGURE */
  #endif /* IFLA_VF_MAX */
  #ifdef CONFIG_NET_POLL_CONTROLLER
  	.ndo_poll_controller	= igb_netpoll,
  #endif
  #ifdef HAVE_NDO_SET_FEATURES
  	.ndo_fix_features	= igb_fix_features,
  	.ndo_set_features	= igb_set_features,
  #endif
  #ifdef HAVE_VLAN_RX_REGISTER
  	.ndo_vlan_rx_register	= igb_vlan_mode,
  #endif
  #ifndef HAVE_RHEL6_NETDEV_OPS_EXT_FDB
  #ifdef NTF_SELF
  	.ndo_fdb_add		= igb_ndo_fdb_add,
  #ifndef USE_DEFAULT_FDB_DEL_DUMP
  	.ndo_fdb_del		= igb_ndo_fdb_del,
  	.ndo_fdb_dump		= igb_ndo_fdb_dump,
  #endif
  #endif /* ! HAVE_RHEL6_NETDEV_OPS_EXT_FDB */
  #ifdef HAVE_BRIDGE_ATTRIBS
  	.ndo_bridge_setlink	= igb_ndo_bridge_setlink,
  	.ndo_bridge_getlink	= igb_ndo_bridge_getlink,
  #endif /* HAVE_BRIDGE_ATTRIBS */
  #endif
  };
  
  #ifdef CONFIG_IGB_VMDQ_NETDEV
  static const struct net_device_ops igb_vmdq_ops = {
  	.ndo_open		= &igb_vmdq_open,
  	.ndo_stop		= &igb_vmdq_close,
  	.ndo_start_xmit		= &igb_vmdq_xmit_frame,
  	.ndo_get_stats		= &igb_vmdq_get_stats,
  	.ndo_set_rx_mode	= &igb_vmdq_set_rx_mode,
  	.ndo_validate_addr	= eth_validate_addr,
  	.ndo_set_mac_address	= &igb_vmdq_set_mac,
  	.ndo_change_mtu		= &igb_vmdq_change_mtu,
  	.ndo_tx_timeout		= &igb_vmdq_tx_timeout,
  	.ndo_vlan_rx_register	= &igb_vmdq_vlan_rx_register,
  	.ndo_vlan_rx_add_vid	= &igb_vmdq_vlan_rx_add_vid,
  	.ndo_vlan_rx_kill_vid	= &igb_vmdq_vlan_rx_kill_vid,
  };
  
  #endif /* CONFIG_IGB_VMDQ_NETDEV */
  #endif /* HAVE_NET_DEVICE_OPS */
  #ifdef CONFIG_IGB_VMDQ_NETDEV
  void igb_assign_vmdq_netdev_ops(struct net_device *vnetdev)
  {
  #ifdef HAVE_NET_DEVICE_OPS
  	vnetdev->netdev_ops = &igb_vmdq_ops;
  #else
  	dev->open = &igb_vmdq_open;
  	dev->stop = &igb_vmdq_close;
  	dev->hard_start_xmit = &igb_vmdq_xmit_frame;
  	dev->get_stats = &igb_vmdq_get_stats;
  #ifdef HAVE_SET_RX_MODE
  	dev->set_rx_mode = &igb_vmdq_set_rx_mode;
  #endif
  	dev->set_multicast_list = &igb_vmdq_set_rx_mode;
  	dev->set_mac_address = &igb_vmdq_set_mac;
  	dev->change_mtu = &igb_vmdq_change_mtu;
  #ifdef HAVE_TX_TIMEOUT
  	dev->tx_timeout = &igb_vmdq_tx_timeout;
  #endif
  #if defined(NETIF_F_HW_VLAN_TX) || defined(NETIF_F_HW_VLAN_CTAG_TX)
  	dev->vlan_rx_register = &igb_vmdq_vlan_rx_register;
  	dev->vlan_rx_add_vid = &igb_vmdq_vlan_rx_add_vid;
  	dev->vlan_rx_kill_vid = &igb_vmdq_vlan_rx_kill_vid;
  #endif
  #endif
  	igb_vmdq_set_ethtool_ops(vnetdev);
  	vnetdev->watchdog_timeo = 5 * HZ;
  
  }
  
  int igb_init_vmdq_netdevs(struct igb_adapter *adapter)
  {
  	int pool, err = 0, base_queue;
  	struct net_device *vnetdev;
  	struct igb_vmdq_adapter *vmdq_adapter;
  
  	for (pool = 1; pool < adapter->vmdq_pools; pool++) {
  		int qpp = (!adapter->rss_queues ? 1 : adapter->rss_queues);
  		base_queue = pool * qpp;
  		vnetdev = alloc_etherdev(sizeof(struct igb_vmdq_adapter));
  		if (!vnetdev) {
  			err = -ENOMEM;
  			break;
  		}
  		vmdq_adapter = netdev_priv(vnetdev);
  		vmdq_adapter->vnetdev = vnetdev;
  		vmdq_adapter->real_adapter = adapter;
  		vmdq_adapter->rx_ring = adapter->rx_ring[base_queue];
  		vmdq_adapter->tx_ring = adapter->tx_ring[base_queue];
  		igb_assign_vmdq_netdev_ops(vnetdev);
  		snprintf(vnetdev->name, IFNAMSIZ, "%sv%d",
  			 adapter->netdev->name, pool);
  		vnetdev->features = adapter->netdev->features;
  #ifdef HAVE_NETDEV_VLAN_FEATURES
  		vnetdev->vlan_features = adapter->netdev->vlan_features;
  #endif
  		adapter->vmdq_netdev[pool-1] = vnetdev;
  		err = register_netdev(vnetdev);
  		if (err)
  			break;
  	}
  	return err;
  }
  
  int igb_remove_vmdq_netdevs(struct igb_adapter *adapter)
  {
  	int pool, err = 0;
  
  	for (pool = 1; pool < adapter->vmdq_pools; pool++) {
  		unregister_netdev(adapter->vmdq_netdev[pool-1]);
  		free_netdev(adapter->vmdq_netdev[pool-1]);
  		adapter->vmdq_netdev[pool-1] = NULL;
  	}
  	return err;
  }
  #endif /* CONFIG_IGB_VMDQ_NETDEV */
  
  /**
   * igb_set_fw_version - Configure version string for ethtool
   * @adapter: adapter struct
   *
   **/
  static void igb_set_fw_version(struct igb_adapter *adapter)
  {
  	struct e1000_hw *hw = &adapter->hw;
  	struct e1000_fw_version fw;
  
  	e1000_get_fw_version(hw, &fw);
  
  	switch (hw->mac.type) {
  	case e1000_i210:
  	case e1000_i211:
  		if (!(e1000_get_flash_presence_i210(hw))) {
  			snprintf(adapter->fw_version,
  			    sizeof(adapter->fw_version),
  			    "%2d.%2d-%d",
  			    fw.invm_major, fw.invm_minor, fw.invm_img_type);
  			break;
  		}
  		/* fall through */
  	default:
  		/* if option rom is valid, display its version too*/
  		if (fw.or_valid) {
  			snprintf(adapter->fw_version,
  			    sizeof(adapter->fw_version),
  			    "%d.%d, 0x%08x, %d.%d.%d",
  			    fw.eep_major, fw.eep_minor, fw.etrack_id,
  			    fw.or_major, fw.or_build, fw.or_patch);
  		/* no option rom */
  		} else {
  			if (fw.etrack_id != 0X0000) {
  			snprintf(adapter->fw_version,
  			    sizeof(adapter->fw_version),
  			    "%d.%d, 0x%08x",
  			    fw.eep_major, fw.eep_minor, fw.etrack_id);
  			} else {
  			snprintf(adapter->fw_version,
  			    sizeof(adapter->fw_version),
  			    "%d.%d.%d",
  			    fw.eep_major, fw.eep_minor, fw.eep_build);
  			}
  		}
  		break;
  	}
  
  	return;
  }
  
  /**
   * igb_init_mas - init Media Autosense feature if enabled in the NVM
   *
   * @adapter: adapter struct
   **/
  static void igb_init_mas(struct igb_adapter *adapter)
  {
  	struct e1000_hw *hw = &adapter->hw;
  	u16 eeprom_data;
  
  	e1000_read_nvm(hw, NVM_COMPAT, 1, &eeprom_data);
  	switch (hw->bus.func) {
  	case E1000_FUNC_0:
  		if (eeprom_data & IGB_MAS_ENABLE_0)
  			adapter->flags |= IGB_FLAG_MAS_ENABLE;
  		break;
  	case E1000_FUNC_1:
  		if (eeprom_data & IGB_MAS_ENABLE_1)
  			adapter->flags |= IGB_FLAG_MAS_ENABLE;
  		break;
  	case E1000_FUNC_2:
  		if (eeprom_data & IGB_MAS_ENABLE_2)
  			adapter->flags |= IGB_FLAG_MAS_ENABLE;
  		break;
  	case E1000_FUNC_3:
  		if (eeprom_data & IGB_MAS_ENABLE_3)
  			adapter->flags |= IGB_FLAG_MAS_ENABLE;
  		break;
  	default:
  		/* Shouldn't get here */
  		dev_err(pci_dev_to_dev(adapter->pdev),
  			"%s:AMS: Invalid port configuration, returning\n",
  			adapter->netdev->name);
  		break;
  	}
  }
  
  /**
   * igb_probe - Device Initialization Routine
   * @pdev: PCI device information struct
   * @ent: entry in igb_pci_tbl
   *
   * Returns 0 on success, negative on failure
   *
   * igb_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 igb_probe(struct pci_dev *pdev,
  			       const struct pci_device_id *ent)
  {
  	struct net_device *netdev;
  	struct igb_adapter *adapter;
  	struct e1000_hw *hw;
  	u16 eeprom_data = 0;
  	u8 pba_str[E1000_PBANUM_LENGTH];
  	s32 ret_val;
  	static int global_quad_port_a; /* global quad port a indication */
  	int i, err, pci_using_dac;
  	static int cards_found;
  
  	err = pci_enable_device_mem(pdev);
  	if (err)
  		return err;
  
  	pci_using_dac = 0;
  	err = dma_set_mask(pci_dev_to_dev(pdev), DMA_BIT_MASK(64));
  	if (!err) {
  		err = dma_set_coherent_mask(pci_dev_to_dev(pdev), DMA_BIT_MASK(64));
  		if (!err)
  			pci_using_dac = 1;
  	} else {
  		err = dma_set_mask(pci_dev_to_dev(pdev), DMA_BIT_MASK(32));
  		if (err) {
  			err = dma_set_coherent_mask(pci_dev_to_dev(pdev), DMA_BIT_MASK(32));
  			if (err) {
  				IGB_ERR("No usable DMA configuration, "
  				        "aborting\n");
  				goto err_dma;
  			}
  		}
  	}
  
  #ifndef HAVE_ASPM_QUIRKS
  	/* 82575 requires that the pci-e link partner disable the L0s state */
  	switch (pdev->device) {
  	case E1000_DEV_ID_82575EB_COPPER:
  	case E1000_DEV_ID_82575EB_FIBER_SERDES:
  	case E1000_DEV_ID_82575GB_QUAD_COPPER:
  		pci_disable_link_state(pdev, PCIE_LINK_STATE_L0S);
  	default:
  		break;
  	}
  
  #endif /* HAVE_ASPM_QUIRKS */
  	err = pci_request_selected_regions(pdev,
  	                                   pci_select_bars(pdev,
                                                             IORESOURCE_MEM),
  	                                   igb_driver_name);
  	if (err)
  		goto err_pci_reg;
  
  	pci_enable_pcie_error_reporting(pdev);
  
  	pci_set_master(pdev);
  
  	err = -ENOMEM;
  #ifdef HAVE_TX_MQ
  	netdev = alloc_etherdev_mq(sizeof(struct igb_adapter),
  	                           IGB_MAX_TX_QUEUES);
  #else
  	netdev = alloc_etherdev(sizeof(struct igb_adapter));
  #endif /* HAVE_TX_MQ */
  	if (!netdev)
  		goto err_alloc_etherdev;
  
  	SET_MODULE_OWNER(netdev);
  	SET_NETDEV_DEV(netdev, &pdev->dev);
  
  	pci_set_drvdata(pdev, netdev);
  	adapter = netdev_priv(netdev);
  	adapter->netdev = netdev;
  	adapter->pdev = pdev;
  	hw = &adapter->hw;
  	hw->back = adapter;
  	adapter->port_num = hw->bus.func;
  	adapter->msg_enable = (1 << debug) - 1;
  
  #ifdef HAVE_PCI_ERS
  	err = pci_save_state(pdev);
  	if (err)
  		goto err_ioremap;
  #endif
  	err = -EIO;
  	hw->hw_addr = ioremap(pci_resource_start(pdev, 0),
  	                      pci_resource_len(pdev, 0));
  	if (!hw->hw_addr)
  		goto err_ioremap;
  
  #ifdef HAVE_NET_DEVICE_OPS
  	netdev->netdev_ops = &igb_netdev_ops;
  #else /* HAVE_NET_DEVICE_OPS */
  	netdev->open = &igb_open;
  	netdev->stop = &igb_close;
  	netdev->get_stats = &igb_get_stats;
  #ifdef HAVE_SET_RX_MODE
  	netdev->set_rx_mode = &igb_set_rx_mode;
  #endif
  	netdev->set_multicast_list = &igb_set_rx_mode;
  	netdev->set_mac_address = &igb_set_mac;
  	netdev->change_mtu = &igb_change_mtu;
  	netdev->do_ioctl = &igb_ioctl;
  #ifdef HAVE_TX_TIMEOUT
  	netdev->tx_timeout = &igb_tx_timeout;
  #endif
  	netdev->vlan_rx_register = igb_vlan_mode;
  	netdev->vlan_rx_add_vid = igb_vlan_rx_add_vid;
  	netdev->vlan_rx_kill_vid = igb_vlan_rx_kill_vid;
  #ifdef CONFIG_NET_POLL_CONTROLLER
  	netdev->poll_controller = igb_netpoll;
  #endif
  	netdev->hard_start_xmit = &igb_xmit_frame;
  #endif /* HAVE_NET_DEVICE_OPS */
  	igb_set_ethtool_ops(netdev);
  #ifdef HAVE_TX_TIMEOUT
  	netdev->watchdog_timeo = 5 * HZ;
  #endif
  
  	strncpy(netdev->name, pci_name(pdev), sizeof(netdev->name) - 1);
  
  	adapter->bd_number = cards_found;
  
  	/* setup the private structure */
  	err = igb_sw_init(adapter);
  	if (err)
  		goto err_sw_init;
  
  	e1000_get_bus_info(hw);
  
  	hw->phy.autoneg_wait_to_complete = FALSE;
  	hw->mac.adaptive_ifs = FALSE;
  
  	/* Copper options */
  	if (hw->phy.media_type == e1000_media_type_copper) {
  		hw->phy.mdix = AUTO_ALL_MODES;
  		hw->phy.disable_polarity_correction = FALSE;
  		hw->phy.ms_type = e1000_ms_hw_default;
  	}
  
  	if (e1000_check_reset_block(hw))
  		dev_info(pci_dev_to_dev(pdev),
  			"PHY reset is blocked due to SOL/IDER session.\n");
  
  	/*
  	 * features is initialized to 0 in allocation, it might have bits
  	 * set by igb_sw_init so we should use an or instead of an
  	 * assignment.
  	 */
  	netdev->features |= NETIF_F_SG |
  			    NETIF_F_IP_CSUM |
  #ifdef NETIF_F_IPV6_CSUM
  			    NETIF_F_IPV6_CSUM |
  #endif
  #ifdef NETIF_F_TSO
  			    NETIF_F_TSO |
  #ifdef NETIF_F_TSO6
  			    NETIF_F_TSO6 |
  #endif
  #endif /* NETIF_F_TSO */
  #ifdef NETIF_F_RXHASH
  			    NETIF_F_RXHASH |
  #endif
  			    NETIF_F_RXCSUM |
  #ifdef NETIF_F_HW_VLAN_CTAG_RX
  			    NETIF_F_HW_VLAN_CTAG_RX |
  			    NETIF_F_HW_VLAN_CTAG_TX;
  #else
  			    NETIF_F_HW_VLAN_RX |
  			    NETIF_F_HW_VLAN_TX;
  #endif
  
  	if (hw->mac.type >= e1000_82576)
  		netdev->features |= NETIF_F_SCTP_CSUM;
  
  #ifdef HAVE_NDO_SET_FEATURES
  	/* copy netdev features into list of user selectable features */
  	netdev->hw_features |= netdev->features;
  #ifndef IGB_NO_LRO
  
  	/* give us the option of enabling LRO later */
  	netdev->hw_features |= NETIF_F_LRO;
  #endif
  #else
  #ifdef NETIF_F_GRO
  
  	/* this is only needed on kernels prior to 2.6.39 */
  	netdev->features |= NETIF_F_GRO;
  #endif
  #endif
  
  	/* set this bit last since it cannot be part of hw_features */
  #ifdef NETIF_F_HW_VLAN_CTAG_FILTER
  	netdev->features |= NETIF_F_HW_VLAN_CTAG_FILTER;
  #else
  	netdev->features |= NETIF_F_HW_VLAN_FILTER;
  #endif
  
  #ifdef HAVE_NETDEV_VLAN_FEATURES
  	netdev->vlan_features |= NETIF_F_TSO |
  				 NETIF_F_TSO6 |
  				 NETIF_F_IP_CSUM |
  				 NETIF_F_IPV6_CSUM |
  				 NETIF_F_SG;
  
  #endif
  	if (pci_using_dac)
  		netdev->features |= NETIF_F_HIGHDMA;
  
  	adapter->en_mng_pt = e1000_enable_mng_pass_thru(hw);
  #ifdef DEBUG
  	if (adapter->dmac != IGB_DMAC_DISABLE)
  		printk("%s: DMA Coalescing is enabled..\n", netdev->name);
  #endif
  
  	/* before reading the NVM, reset the controller to put the device in a
  	 * known good starting state */
  	e1000_reset_hw(hw);
  
  	/* make sure the NVM is good */
  	if (e1000_validate_nvm_checksum(hw) < 0) {
  		dev_err(pci_dev_to_dev(pdev), "The NVM Checksum Is Not"
  		        " Valid\n");
  		err = -EIO;
  		goto err_eeprom;
  	}
  
  	/* copy the MAC address out of the NVM */
  	if (e1000_read_mac_addr(hw))
  		dev_err(pci_dev_to_dev(pdev), "NVM Read Error\n");
  	memcpy(netdev->dev_addr, hw->mac.addr, netdev->addr_len);
  #ifdef ETHTOOL_GPERMADDR
  	memcpy(netdev->perm_addr, hw->mac.addr, netdev->addr_len);
  
  	if (!is_valid_ether_addr(netdev->perm_addr)) {
  #else
  	if (!is_valid_ether_addr(netdev->dev_addr)) {
  #endif
  		dev_err(pci_dev_to_dev(pdev), "Invalid MAC Address\n");
  		err = -EIO;
  		goto err_eeprom;
  	}
  
  	memcpy(&adapter->mac_table[0].addr, hw->mac.addr, netdev->addr_len);
  	adapter->mac_table[0].queue = adapter->vfs_allocated_count;
  	adapter->mac_table[0].state = (IGB_MAC_STATE_DEFAULT | IGB_MAC_STATE_IN_USE);
  	igb_rar_set(adapter, 0);
  
  	/* get firmware version for ethtool -i */
  	igb_set_fw_version(adapter);
  
  	/* Check if Media Autosense is enabled */
  	if (hw->mac.type == e1000_82580)
  		igb_init_mas(adapter);
  #ifdef HAVE_TIMER_SETUP
  	timer_setup(&adapter->watchdog_timer, &igb_watchdog, 0);
  	if (adapter->flags & IGB_FLAG_DETECT_BAD_DMA)
  		timer_setup(&adapter->dma_err_timer, &igb_dma_err_timer, 0);
  	timer_setup(&adapter->phy_info_timer, &igb_update_phy_info, 0);
  #else
  	setup_timer(&adapter->watchdog_timer, &igb_watchdog,
  	            (unsigned long) adapter);
  	if (adapter->flags & IGB_FLAG_DETECT_BAD_DMA)
  		setup_timer(&adapter->dma_err_timer, &igb_dma_err_timer,
  			    (unsigned long) adapter);
  	setup_timer(&adapter->phy_info_timer, &igb_update_phy_info,
  	            (unsigned long) adapter);
  #endif
  
  	INIT_WORK(&adapter->reset_task, igb_reset_task);
  	INIT_WORK(&adapter->watchdog_task, igb_watchdog_task);
  	if (adapter->flags & IGB_FLAG_DETECT_BAD_DMA)
  		INIT_WORK(&adapter->dma_err_task, igb_dma_err_task);
  
  	/* Initialize link properties that are user-changeable */
  	adapter->fc_autoneg = true;
  	hw->mac.autoneg = true;
  	hw->phy.autoneg_advertised = 0x2f;
  
  	hw->fc.requested_mode = e1000_fc_default;
  	hw->fc.current_mode = e1000_fc_default;
  
  	e1000_validate_mdi_setting(hw);
  
  	/* By default, support wake on port A */
  	if (hw->bus.func == 0)
  		adapter->flags |= IGB_FLAG_WOL_SUPPORTED;
  
  	/* Check the NVM for wake support for non-port A ports */
  	if (hw->mac.type >= e1000_82580)
  		hw->nvm.ops.read(hw, NVM_INIT_CONTROL3_PORT_A +
  		                 NVM_82580_LAN_FUNC_OFFSET(hw->bus.func), 1,
  		                 &eeprom_data);
  	else if (hw->bus.func == 1)
  		e1000_read_nvm(hw, NVM_INIT_CONTROL3_PORT_B, 1, &eeprom_data);
  
  	if (eeprom_data & IGB_EEPROM_APME)
  		adapter->flags |= IGB_FLAG_WOL_SUPPORTED;
  
  	/* now that we have the eeprom settings, apply the special cases where
  	 * the eeprom may be wrong or the board simply won't support wake on
  	 * lan on a particular port */
  	switch (pdev->device) {
  	case E1000_DEV_ID_82575GB_QUAD_COPPER:
  		adapter->flags &= ~IGB_FLAG_WOL_SUPPORTED;
  		break;
  	case E1000_DEV_ID_82575EB_FIBER_SERDES:
  	case E1000_DEV_ID_82576_FIBER:
  	case E1000_DEV_ID_82576_SERDES:
  		/* Wake events only supported on port A for dual fiber
  		 * regardless of eeprom setting */
  		if (E1000_READ_REG(hw, E1000_STATUS) & E1000_STATUS_FUNC_1)
  			adapter->flags &= ~IGB_FLAG_WOL_SUPPORTED;
  		break;
  	case E1000_DEV_ID_82576_QUAD_COPPER:
  	case E1000_DEV_ID_82576_QUAD_COPPER_ET2:
  		/* if quad port adapter, disable WoL on all but port A */
  		if (global_quad_port_a != 0)
  			adapter->flags &= ~IGB_FLAG_WOL_SUPPORTED;
  		else
  			adapter->flags |= IGB_FLAG_QUAD_PORT_A;
  		/* Reset for multiple quad port adapters */
  		if (++global_quad_port_a == 4)
  			global_quad_port_a = 0;
  		break;
  	default:
  		/* If the device can't wake, don't set software support */
  		if (!device_can_wakeup(&adapter->pdev->dev))
  			adapter->flags &= ~IGB_FLAG_WOL_SUPPORTED;
  		break;
  	}
  
  	/* initialize the wol settings based on the eeprom settings */
  	if (adapter->flags & IGB_FLAG_WOL_SUPPORTED)
  		adapter->wol |= E1000_WUFC_MAG;
  
  	/* Some vendors want WoL disabled by default, but still supported */
  	if ((hw->mac.type == e1000_i350) &&
  	    (pdev->subsystem_vendor == PCI_VENDOR_ID_HP)) {
  		adapter->flags |= IGB_FLAG_WOL_SUPPORTED;
  		adapter->wol = 0;
  	}
  
  	device_set_wakeup_enable(pci_dev_to_dev(adapter->pdev),
  				 adapter->flags & IGB_FLAG_WOL_SUPPORTED);
  
  	/* reset the hardware with the new settings */
  	igb_reset(adapter);
  	adapter->devrc = 0;
  
  #ifdef HAVE_I2C_SUPPORT
  	/* Init the I2C interface */
  	err = igb_init_i2c(adapter);
  	if (err) {
  		dev_err(&pdev->dev, "failed to init i2c interface\n");
  		goto err_eeprom;
  	}
  #endif /* HAVE_I2C_SUPPORT */
  
  	/* let the f/w know that the h/w is now under the control of the
  	 * driver. */
  	igb_get_hw_control(adapter);
  
  	strncpy(netdev->name, "eth%d", IFNAMSIZ);
  	err = register_netdev(netdev);
  	if (err)
  		goto err_register;
  
  #ifdef CONFIG_IGB_VMDQ_NETDEV
  	err = igb_init_vmdq_netdevs(adapter);
  	if (err)
  		goto err_register;
  #endif
  	/* carrier off reporting is important to ethtool even BEFORE open */
  	netif_carrier_off(netdev);
  
  #ifdef IGB_DCA
  	if (dca_add_requester(&pdev->dev) == E1000_SUCCESS) {
  		adapter->flags |= IGB_FLAG_DCA_ENABLED;
  		dev_info(pci_dev_to_dev(pdev), "DCA enabled\n");
  		igb_setup_dca(adapter);
  	}
  
  #endif
  #ifdef HAVE_PTP_1588_CLOCK
  	/* do hw tstamp init after resetting */
  	igb_ptp_init(adapter);
  #endif /* HAVE_PTP_1588_CLOCK */
  
  	dev_info(pci_dev_to_dev(pdev), "Intel(R) Gigabit Ethernet Network Connection\n");
  	/* print bus type/speed/width info */
  	dev_info(pci_dev_to_dev(pdev), "%s: (PCIe:%s:%s) ",
  	         netdev->name,
  	         ((hw->bus.speed == e1000_bus_speed_2500) ? "2.5GT/s" :
  	          (hw->bus.speed == e1000_bus_speed_5000) ? "5.0GT/s" :
  		  (hw->mac.type == e1000_i354) ? "integrated" :
  	                                                    "unknown"),
  	         ((hw->bus.width == e1000_bus_width_pcie_x4) ? "Width x4" :
  	          (hw->bus.width == e1000_bus_width_pcie_x2) ? "Width x2" :
  	          (hw->bus.width == e1000_bus_width_pcie_x1) ? "Width x1" :
  		  (hw->mac.type == e1000_i354) ? "integrated" :
  	           "unknown"));
  	dev_info(pci_dev_to_dev(pdev), "%s: MAC: ", netdev->name);
  	for (i = 0; i < 6; i++)
  		printk("%2.2x%c", netdev->dev_addr[i], i == 5 ? '\n' : ':');
  
  	ret_val = e1000_read_pba_string(hw, pba_str, E1000_PBANUM_LENGTH);
  	if (ret_val)
  		strncpy(pba_str, "Unknown", sizeof(pba_str) - 1);
  	dev_info(pci_dev_to_dev(pdev), "%s: PBA No: %s\n", netdev->name,
  		 pba_str);
  
  
  	/* Initialize the thermal sensor on i350 devices. */
  	if (hw->mac.type == e1000_i350) {
  		if (hw->bus.func == 0) {
  			u16 ets_word;
  
  			/*
  			 * Read the NVM to determine if this i350 device
  			 * supports an external thermal sensor.
  			 */
  			e1000_read_nvm(hw, NVM_ETS_CFG, 1, &ets_word);
  			if (ets_word != 0x0000 && ets_word != 0xFFFF)
  				adapter->ets = true;
  			else
  				adapter->ets = false;
  		}
  #ifdef IGB_HWMON
  
  		igb_sysfs_init(adapter);
  #else
  #ifdef IGB_PROCFS
  
  		igb_procfs_init(adapter);
  #endif /* IGB_PROCFS */
  #endif /* IGB_HWMON */
  	} else {
  		adapter->ets = false;
  	}
  
  	if (hw->phy.media_type == e1000_media_type_copper) {
  		switch (hw->mac.type) {
  		case e1000_i350:
  		case e1000_i210:
  		case e1000_i211:
  			/* Enable EEE for internal copper PHY devices */
  			err = e1000_set_eee_i350(hw);
  			if (!err &&
  			    (adapter->flags & IGB_FLAG_EEE))
  				adapter->eee_advert =
  					MDIO_EEE_100TX | MDIO_EEE_1000T;
  			break;
  		case e1000_i354:
  			if ((E1000_READ_REG(hw, E1000_CTRL_EXT)) &
  			    (E1000_CTRL_EXT_LINK_MODE_SGMII)) {
  				err = e1000_set_eee_i354(hw);
  				if ((!err) &&
  				    (adapter->flags & IGB_FLAG_EEE))
  					adapter->eee_advert =
  					   MDIO_EEE_100TX | MDIO_EEE_1000T;
  			}
  			break;
  		default:
  			break;
  		}
  	}
  
  	/* send driver version info to firmware */
  	if (hw->mac.type >= e1000_i350)
  		igb_init_fw(adapter);
  
  #ifndef IGB_NO_LRO
  	if (netdev->features & NETIF_F_LRO)
  		dev_info(pci_dev_to_dev(pdev), "Internal LRO is enabled \n");
  	else
  		dev_info(pci_dev_to_dev(pdev), "LRO is disabled \n");
  #endif
  	dev_info(pci_dev_to_dev(pdev),
  	         "Using %s interrupts. %d rx queue(s), %d tx queue(s)\n",
  	         adapter->msix_entries ? "MSI-X" :
  	         (adapter->flags & IGB_FLAG_HAS_MSI) ? "MSI" : "legacy",
  	         adapter->num_rx_queues, adapter->num_tx_queues);
  
  	cards_found++;
  
  	pm_runtime_put_noidle(&pdev->dev);
  	return 0;
  
  err_register:
  	igb_release_hw_control(adapter);
  #ifdef HAVE_I2C_SUPPORT
  	memset(&adapter->i2c_adap, 0, sizeof(adapter->i2c_adap));
  #endif /* HAVE_I2C_SUPPORT */
  err_eeprom:
  	if (!e1000_check_reset_block(hw))
  		e1000_phy_hw_reset(hw);
  
  	if (hw->flash_address)
  		iounmap(hw->flash_address);
  err_sw_init:
  	igb_clear_interrupt_scheme(adapter);
  	igb_reset_sriov_capability(adapter);
  	iounmap(hw->hw_addr);
  err_ioremap:
  	free_netdev(netdev);
  err_alloc_etherdev:
  	pci_release_selected_regions(pdev,
  	                             pci_select_bars(pdev, IORESOURCE_MEM));
  err_pci_reg:
  err_dma:
  	pci_disable_device(pdev);
  	return err;
  }
  #ifdef HAVE_I2C_SUPPORT
  /*
   *  igb_remove_i2c - Cleanup  I2C interface
   *  @adapter: pointer to adapter structure
   *
   */
  static void igb_remove_i2c(struct igb_adapter *adapter)
  {
  
  	/* free the adapter bus structure */
  	i2c_del_adapter(&adapter->i2c_adap);
  }
  #endif /* HAVE_I2C_SUPPORT */
  
  /**
   * igb_remove - Device Removal Routine
   * @pdev: PCI device information struct
   *
   * igb_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 igb_remove(struct pci_dev *pdev)
  {
  	struct net_device *netdev = pci_get_drvdata(pdev);
  	struct igb_adapter *adapter = netdev_priv(netdev);
  	struct e1000_hw *hw = &adapter->hw;
  
  	pm_runtime_get_noresume(&pdev->dev);
  #ifdef HAVE_I2C_SUPPORT
  	igb_remove_i2c(adapter);
  #endif /* HAVE_I2C_SUPPORT */
  #ifdef HAVE_PTP_1588_CLOCK
  	igb_ptp_stop(adapter);
  #endif /* HAVE_PTP_1588_CLOCK */
  
  	/* flush_scheduled work may reschedule our watchdog task, so
  	 * explicitly disable watchdog tasks from being rescheduled  */
  	set_bit(__IGB_DOWN, &adapter->state);
  	del_timer_sync(&adapter->watchdog_timer);
  	if (adapter->flags & IGB_FLAG_DETECT_BAD_DMA)
  		del_timer_sync(&adapter->dma_err_timer);
  	del_timer_sync(&adapter->phy_info_timer);
  
  	flush_scheduled_work();
  
  #ifdef IGB_DCA
  	if (adapter->flags & IGB_FLAG_DCA_ENABLED) {
  		dev_info(pci_dev_to_dev(pdev), "DCA disabled\n");
  		dca_remove_requester(&pdev->dev);
  		adapter->flags &= ~IGB_FLAG_DCA_ENABLED;
  		E1000_WRITE_REG(hw, E1000_DCA_CTRL, E1000_DCA_CTRL_DCA_DISABLE);
  	}
  #endif
  
  	/* Release control of h/w to f/w.  If f/w is AMT enabled, this
  	 * would have already happened in close and is redundant. */
  	igb_release_hw_control(adapter);
  
  	unregister_netdev(netdev);
  #ifdef CONFIG_IGB_VMDQ_NETDEV
  	igb_remove_vmdq_netdevs(adapter);
  #endif
  
  	igb_clear_interrupt_scheme(adapter);
  	igb_reset_sriov_capability(adapter);
  
  	iounmap(hw->hw_addr);
  	if (hw->flash_address)
  		iounmap(hw->flash_address);
  	pci_release_selected_regions(pdev,
  	                             pci_select_bars(pdev, IORESOURCE_MEM));
  
  #ifdef IGB_HWMON
  	igb_sysfs_exit(adapter);
  #else
  #ifdef IGB_PROCFS
  	igb_procfs_exit(adapter);
  #endif /* IGB_PROCFS */
  #endif /* IGB_HWMON */
  	kfree(adapter->mac_table);
  	kfree(adapter->shadow_vfta);
  	free_netdev(netdev);
  
  	pci_disable_pcie_error_reporting(pdev);
  
  	pci_disable_device(pdev);
  }
  
  /**
   * igb_sw_init - Initialize general software structures (struct igb_adapter)
   * @adapter: board private structure to initialize
   *
   * igb_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 igb_sw_init(struct igb_adapter *adapter)
  {
  	struct e1000_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_device_id = pdev->subsystem_device;
  
  	pci_read_config_byte(pdev, PCI_REVISION_ID, &hw->revision_id);
  
  	pci_read_config_word(pdev, PCI_COMMAND, &hw->bus.pci_cmd_word);
  
  	/* set default ring sizes */
  	adapter->tx_ring_count = IGB_DEFAULT_TXD;
  	adapter->rx_ring_count = IGB_DEFAULT_RXD;
  
  	/* set default work limits */
  	adapter->tx_work_limit = IGB_DEFAULT_TX_WORK;
  
  	adapter->max_frame_size = netdev->mtu + ETH_HLEN + ETH_FCS_LEN +
  					      VLAN_HLEN;
  
  	/* Initialize the hardware-specific values */
  	if (e1000_setup_init_funcs(hw, TRUE)) {
  		dev_err(pci_dev_to_dev(pdev), "Hardware Initialization Failure\n");
  		return -EIO;
  	}
  
  	adapter->mac_table = kzalloc(sizeof(struct igb_mac_addr) *
  				     hw->mac.rar_entry_count,
  				     GFP_ATOMIC);
  
  	/* Setup and initialize a copy of the hw vlan table array */
  	adapter->shadow_vfta = kzalloc(sizeof(u32) * E1000_VFTA_ENTRIES,
  				       GFP_ATOMIC);
  #ifdef NO_KNI
  	/* These calls may decrease the number of queues */
  	if (hw->mac.type < e1000_i210) {
  		igb_set_sriov_capability(adapter);
  	}
  
  	if (igb_init_interrupt_scheme(adapter, true)) {
  		dev_err(pci_dev_to_dev(pdev), "Unable to allocate memory for queues\n");
  		return -ENOMEM;
  	}
  
  	/* Explicitly disable IRQ since the NIC can be in any state. */
  	igb_irq_disable(adapter);
  
  	set_bit(__IGB_DOWN, &adapter->state);
  #endif
  	return 0;
  }
  
  /**
   * igb_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 __igb_open(struct net_device *netdev, bool resuming)
  {
  	struct igb_adapter *adapter = netdev_priv(netdev);
  	struct e1000_hw *hw = &adapter->hw;
  #ifdef CONFIG_PM_RUNTIME
  	struct pci_dev *pdev = adapter->pdev;
  #endif /* CONFIG_PM_RUNTIME */
  	int err;
  	int i;
  
  	/* disallow open during test */
  	if (test_bit(__IGB_TESTING, &adapter->state)) {
  		WARN_ON(resuming);
  		return -EBUSY;
  	}
  
  #ifdef CONFIG_PM_RUNTIME
  	if (!resuming)
  		pm_runtime_get_sync(&pdev->dev);
  #endif /* CONFIG_PM_RUNTIME */
  
  	netif_carrier_off(netdev);
  
  	/* allocate transmit descriptors */
  	err = igb_setup_all_tx_resources(adapter);
  	if (err)
  		goto err_setup_tx;
  
  	/* allocate receive descriptors */
  	err = igb_setup_all_rx_resources(adapter);
  	if (err)
  		goto err_setup_rx;
  
  	igb_power_up_link(adapter);
  
  	/* before we allocate an interrupt, we must be ready to handle it.
  	 * Setting DEBUG_SHIRQ in the kernel makes it fire an interrupt
  	 * as soon as we call pci_request_irq, so we have to setup our
  	 * clean_rx handler before we do so.  */
  	igb_configure(adapter);
  
  	err = igb_request_irq(adapter);
  	if (err)
  		goto err_req_irq;
  
  	/* Notify the stack of the actual queue counts. */
  	netif_set_real_num_tx_queues(netdev,
  				     adapter->vmdq_pools ? 1 :
  				     adapter->num_tx_queues);
  
  	err = netif_set_real_num_rx_queues(netdev,
  					   adapter->vmdq_pools ? 1 :
  					   adapter->num_rx_queues);
  	if (err)
  		goto err_set_queues;
  
  	/* From here on the code is the same as igb_up() */
  	clear_bit(__IGB_DOWN, &adapter->state);
  
  	for (i = 0; i < adapter->num_q_vectors; i++)
  		napi_enable(&(adapter->q_vector[i]->napi));
  	igb_configure_lli(adapter);
  
  	/* Clear any pending interrupts. */
  	E1000_READ_REG(hw, E1000_ICR);
  
  	igb_irq_enable(adapter);
  
  	/* notify VFs that reset has been completed */
  	if (adapter->vfs_allocated_count) {
  		u32 reg_data = E1000_READ_REG(hw, E1000_CTRL_EXT);
  		reg_data |= E1000_CTRL_EXT_PFRSTD;
  		E1000_WRITE_REG(hw, E1000_CTRL_EXT, reg_data);
  	}
  
  	netif_tx_start_all_queues(netdev);
  
  	if (adapter->flags & IGB_FLAG_DETECT_BAD_DMA)
  		schedule_work(&adapter->dma_err_task);
  
  	/* start the watchdog. */
  	hw->mac.get_link_status = 1;
  	schedule_work(&adapter->watchdog_task);
  
  	return E1000_SUCCESS;
  
  err_set_queues:
  	igb_free_irq(adapter);
  err_req_irq:
  	igb_release_hw_control(adapter);
  	igb_power_down_link(adapter);
  	igb_free_all_rx_resources(adapter);
  err_setup_rx:
  	igb_free_all_tx_resources(adapter);
  err_setup_tx:
  	igb_reset(adapter);
  
  #ifdef CONFIG_PM_RUNTIME
  	if (!resuming)
  		pm_runtime_put(&pdev->dev);
  #endif /* CONFIG_PM_RUNTIME */
  
  	return err;
  }
  
  static int igb_open(struct net_device *netdev)
  {
  	return __igb_open(netdev, false);
  }
  
  /**
   * igb_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 driver's 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 __igb_close(struct net_device *netdev, bool suspending)
  {
  	struct igb_adapter *adapter = netdev_priv(netdev);
  #ifdef CONFIG_PM_RUNTIME
  	struct pci_dev *pdev = adapter->pdev;
  #endif /* CONFIG_PM_RUNTIME */
  
  	WARN_ON(test_bit(__IGB_RESETTING, &adapter->state));
  
  #ifdef CONFIG_PM_RUNTIME
  	if (!suspending)
  		pm_runtime_get_sync(&pdev->dev);
  #endif /* CONFIG_PM_RUNTIME */
  
  	igb_down(adapter);
  
  	igb_release_hw_control(adapter);
  
  	igb_free_irq(adapter);
  
  	igb_free_all_tx_resources(adapter);
  	igb_free_all_rx_resources(adapter);
  
  #ifdef CONFIG_PM_RUNTIME
  	if (!suspending)
  		pm_runtime_put_sync(&pdev->dev);
  #endif /* CONFIG_PM_RUNTIME */
  
  	return 0;
  }
  
  static int igb_close(struct net_device *netdev)
  {
  	return __igb_close(netdev, false);
  }
  
  /**
   * igb_setup_tx_resources - allocate Tx resources (Descriptors)
   * @tx_ring: tx descriptor ring (for a specific queue) to setup
   *
   * Return 0 on success, negative on failure
   **/
  int igb_setup_tx_resources(struct igb_ring *tx_ring)
  {
  	struct device *dev = tx_ring->dev;
  	int size;
  
  	size = sizeof(struct igb_tx_buffer) * tx_ring->count;
  	tx_ring->tx_buffer_info = vzalloc(size);
  	if (!tx_ring->tx_buffer_info)
  		goto err;
  
  	/* round up to nearest 4K */
  	tx_ring->size = tx_ring->count * sizeof(union e1000_adv_tx_desc);
  	tx_ring->size = ALIGN(tx_ring->size, 4096);
  
  	tx_ring->desc = dma_alloc_coherent(dev, tx_ring->size,
  					   &tx_ring->dma, GFP_KERNEL);
  
  	if (!tx_ring->desc)
  		goto err;
  
  	tx_ring->next_to_use = 0;
  	tx_ring->next_to_clean = 0;
  
  	return 0;
  
  err:
  	vfree(tx_ring->tx_buffer_info);
  	dev_err(dev,
  		"Unable to allocate memory for the transmit descriptor ring\n");
  	return -ENOMEM;
  }
  
  /**
   * igb_setup_all_tx_resources - wrapper to allocate Tx resources
   *				  (Descriptors) for all queues
   * @adapter: board private structure
   *
   * Return 0 on success, negative on failure
   **/
  static int igb_setup_all_tx_resources(struct igb_adapter *adapter)
  {
  	struct pci_dev *pdev = adapter->pdev;
  	int i, err = 0;
  
  	for (i = 0; i < adapter->num_tx_queues; i++) {
  		err = igb_setup_tx_resources(adapter->tx_ring[i]);
  		if (err) {
  			dev_err(pci_dev_to_dev(pdev),
  				"Allocation for Tx Queue %u failed\n", i);
  			for (i--; i >= 0; i--)
  				igb_free_tx_resources(adapter->tx_ring[i]);
  			break;
  		}
  	}
  
  	return err;
  }
  
  /**
   * igb_setup_tctl - configure the transmit control registers
   * @adapter: Board private structure
   **/
  void igb_setup_tctl(struct igb_adapter *adapter)
  {
  	struct e1000_hw *hw = &adapter->hw;
  	u32 tctl;
  
  	/* disable queue 0 which is enabled by default on 82575 and 82576 */
  	E1000_WRITE_REG(hw, E1000_TXDCTL(0), 0);
  
  	/* Program the Transmit Control Register */
  	tctl = E1000_READ_REG(hw, E1000_TCTL);
  	tctl &= ~E1000_TCTL_CT;
  	tctl |= E1000_TCTL_PSP | E1000_TCTL_RTLC |
  		(E1000_COLLISION_THRESHOLD << E1000_CT_SHIFT);
  
  	e1000_config_collision_dist(hw);
  
  	/* Enable transmits */
  	tctl |= E1000_TCTL_EN;
  
  	E1000_WRITE_REG(hw, E1000_TCTL, tctl);
  }
  
  static u32 igb_tx_wthresh(struct igb_adapter *adapter)
  {
  	struct e1000_hw *hw = &adapter->hw;
  	switch (hw->mac.type) {
  	case e1000_i354:
  		return 4;
  	case e1000_82576:
  		if (adapter->msix_entries)
  			return 1;
  	default:
  		break;
  	}
  
  	return 16;
  }
  
  /**
   * igb_configure_tx_ring - Configure transmit ring after Reset
   * @adapter: board private structure
   * @ring: tx ring to configure
   *
   * Configure a transmit ring after a reset.
   **/
  void igb_configure_tx_ring(struct igb_adapter *adapter,
                             struct igb_ring *ring)
  {
  	struct e1000_hw *hw = &adapter->hw;
  	u32 txdctl = 0;
  	u64 tdba = ring->dma;
  	int reg_idx = ring->reg_idx;
  
  	/* disable the queue */
  	E1000_WRITE_REG(hw, E1000_TXDCTL(reg_idx), 0);
  	E1000_WRITE_FLUSH(hw);
  	mdelay(10);
  
  	E1000_WRITE_REG(hw, E1000_TDLEN(reg_idx),
  	                ring->count * sizeof(union e1000_adv_tx_desc));
  	E1000_WRITE_REG(hw, E1000_TDBAL(reg_idx),
  	                tdba & 0x00000000ffffffffULL);
  	E1000_WRITE_REG(hw, E1000_TDBAH(reg_idx), tdba >> 32);
  
  	ring->tail = hw->hw_addr + E1000_TDT(reg_idx);
  	E1000_WRITE_REG(hw, E1000_TDH(reg_idx), 0);
  	writel(0, ring->tail);
  
  	txdctl |= IGB_TX_PTHRESH;
  	txdctl |= IGB_TX_HTHRESH << 8;
  	txdctl |= igb_tx_wthresh(adapter) << 16;
  
  	txdctl |= E1000_TXDCTL_QUEUE_ENABLE;
  	E1000_WRITE_REG(hw, E1000_TXDCTL(reg_idx), txdctl);
  }
  
  /**
   * igb_configure_tx - Configure transmit Unit after Reset
   * @adapter: board private structure
   *
   * Configure the Tx unit of the MAC after a reset.
   **/
  static void igb_configure_tx(struct igb_adapter *adapter)
  {
  	int i;
  
  	for (i = 0; i < adapter->num_tx_queues; i++)
  		igb_configure_tx_ring(adapter, adapter->tx_ring[i]);
  }
  
  /**
   * igb_setup_rx_resources - allocate Rx resources (Descriptors)
   * @rx_ring:    rx descriptor ring (for a specific queue) to setup
   *
   * Returns 0 on success, negative on failure
   **/
  int igb_setup_rx_resources(struct igb_ring *rx_ring)
  {
  	struct device *dev = rx_ring->dev;
  	int size, desc_len;
  
  	size = sizeof(struct igb_rx_buffer) * rx_ring->count;
  	rx_ring->rx_buffer_info = vzalloc(size);
  	if (!rx_ring->rx_buffer_info)
  		goto err;
  
  	desc_len = sizeof(union e1000_adv_rx_desc);
  
  	/* Round up to nearest 4K */
  	rx_ring->size = rx_ring->count * desc_len;
  	rx_ring->size = ALIGN(rx_ring->size, 4096);
  
  	rx_ring->desc = dma_alloc_coherent(dev, rx_ring->size,
  					   &rx_ring->dma, GFP_KERNEL);
  
  	if (!rx_ring->desc)
  		goto err;
  
  	rx_ring->next_to_alloc = 0;
  	rx_ring->next_to_clean = 0;
  	rx_ring->next_to_use = 0;
  
  	return 0;
  
  err:
  	vfree(rx_ring->rx_buffer_info);
  	rx_ring->rx_buffer_info = NULL;
  	dev_err(dev, "Unable to allocate memory for the receive descriptor"
  		" ring\n");
  	return -ENOMEM;
  }
  
  /**
   * igb_setup_all_rx_resources - wrapper to allocate Rx resources
   *				  (Descriptors) for all queues
   * @adapter: board private structure
   *
   * Return 0 on success, negative on failure
   **/
  static int igb_setup_all_rx_resources(struct igb_adapter *adapter)
  {
  	struct pci_dev *pdev = adapter->pdev;
  	int i, err = 0;
  
  	for (i = 0; i < adapter->num_rx_queues; i++) {
  		err = igb_setup_rx_resources(adapter->rx_ring[i]);
  		if (err) {
  			dev_err(pci_dev_to_dev(pdev),
  				"Allocation for Rx Queue %u failed\n", i);
  			for (i--; i >= 0; i--)
  				igb_free_rx_resources(adapter->rx_ring[i]);
  			break;
  		}
  	}
  
  	return err;
  }
  
  /**
   * igb_setup_mrqc - configure the multiple receive queue control registers
   * @adapter: Board private structure
   **/
  static void igb_setup_mrqc(struct igb_adapter *adapter)
  {
  	struct e1000_hw *hw = &adapter->hw;
  	u32 mrqc, rxcsum;
  	u32 j, num_rx_queues, shift = 0, shift2 = 0;
  	static const u32 rsskey[10] = { 0xDA565A6D, 0xC20E5B25, 0x3D256741,
  					0xB08FA343, 0xCB2BCAD0, 0xB4307BAE,
  					0xA32DCB77, 0x0CF23080, 0x3BB7426A,
  					0xFA01ACBE };
  
  	/* Fill out hash function seeds */
  	for (j = 0; j < 10; j++)
  		E1000_WRITE_REG(hw, E1000_RSSRK(j), rsskey[j]);
  
  	num_rx_queues = adapter->rss_queues;
  
  	/* 82575 and 82576 supports 2 RSS queues for VMDq */
  	switch (hw->mac.type) {
  	case e1000_82575:
  		if (adapter->vmdq_pools) {
  			shift = 2;
  			shift2 = 6;
  			break;
  		}
  		shift = 6;
  		break;
  	case e1000_82576:
  		/* 82576 supports 2 RSS queues for SR-IOV */
  		if (adapter->vfs_allocated_count || adapter->vmdq_pools) {
  			shift = 3;
  			num_rx_queues = 2;
  		}
  		break;
  	default:
  		break;
  	}
  
  	/*
  	 * Populate the redirection table 4 entries at a time.  To do this
  	 * we are generating the results for n and n+2 and then interleaving
  	 * those with the results with n+1 and n+3.
  	 */
  	for (j = 0; j < 32; j++) {
  		/* first pass generates n and n+2 */
  		u32 base = ((j * 0x00040004) + 0x00020000) * num_rx_queues;
  		u32 reta = (base & 0x07800780) >> (7 - shift);
  
  		/* second pass generates n+1 and n+3 */
  		base += 0x00010001 * num_rx_queues;
  		reta |= (base & 0x07800780) << (1 + shift);
  
  		/* generate 2nd table for 82575 based parts */
  		if (shift2)
  			reta |= (0x01010101 * num_rx_queues) << shift2;
  
  		E1000_WRITE_REG(hw, E1000_RETA(j), reta);
  	}
  
  	/*
  	 * Disable raw packet checksumming so that RSS hash is placed in
  	 * descriptor on writeback.  No need to enable TCP/UDP/IP checksum
  	 * offloads as they are enabled by default
  	 */
  	rxcsum = E1000_READ_REG(hw, E1000_RXCSUM);
  	rxcsum |= E1000_RXCSUM_PCSD;
  
  	if (adapter->hw.mac.type >= e1000_82576)
  		/* Enable Receive Checksum Offload for SCTP */
  		rxcsum |= E1000_RXCSUM_CRCOFL;
  
  	/* Don't need to set TUOFL or IPOFL, they default to 1 */
  	E1000_WRITE_REG(hw, E1000_RXCSUM, rxcsum);
  
  	/* Generate RSS hash based on packet types, TCP/UDP
  	 * port numbers and/or IPv4/v6 src and dst addresses
  	 */
  	mrqc = E1000_MRQC_RSS_FIELD_IPV4 |
  	       E1000_MRQC_RSS_FIELD_IPV4_TCP |
  	       E1000_MRQC_RSS_FIELD_IPV6 |
  	       E1000_MRQC_RSS_FIELD_IPV6_TCP |
  	       E1000_MRQC_RSS_FIELD_IPV6_TCP_EX;
  
  	if (adapter->flags & IGB_FLAG_RSS_FIELD_IPV4_UDP)
  		mrqc |= E1000_MRQC_RSS_FIELD_IPV4_UDP;
  	if (adapter->flags & IGB_FLAG_RSS_FIELD_IPV6_UDP)
  		mrqc |= E1000_MRQC_RSS_FIELD_IPV6_UDP;
  
  	/* If VMDq is enabled then we set the appropriate mode for that, else
  	 * we default to RSS so that an RSS hash is calculated per packet even
  	 * if we are only using one queue */
  	if (adapter->vfs_allocated_count || adapter->vmdq_pools) {
  		if (hw->mac.type > e1000_82575) {
  			/* Set the default pool for the PF's first queue */
  			u32 vtctl = E1000_READ_REG(hw, E1000_VT_CTL);
  			vtctl &= ~(E1000_VT_CTL_DEFAULT_POOL_MASK |
  				   E1000_VT_CTL_DISABLE_DEF_POOL);
  			vtctl |= adapter->vfs_allocated_count <<
  				E1000_VT_CTL_DEFAULT_POOL_SHIFT;
  			E1000_WRITE_REG(hw, E1000_VT_CTL, vtctl);
  		} else if (adapter->rss_queues > 1) {
  			/* set default queue for pool 1 to queue 2 */
  			E1000_WRITE_REG(hw, E1000_VT_CTL,
  				        adapter->rss_queues << 7);
  		}
  		if (adapter->rss_queues > 1)
  			mrqc |= E1000_MRQC_ENABLE_VMDQ_RSS_2Q;
  		else
  			mrqc |= E1000_MRQC_ENABLE_VMDQ;
  	} else {
  		mrqc |= E1000_MRQC_ENABLE_RSS_4Q;
  	}
  	igb_vmm_control(adapter);
  
  	E1000_WRITE_REG(hw, E1000_MRQC, mrqc);
  }
  
  /**
   * igb_setup_rctl - configure the receive control registers
   * @adapter: Board private structure
   **/
  void igb_setup_rctl(struct igb_adapter *adapter)
  {
  	struct e1000_hw *hw = &adapter->hw;
  	u32 rctl;
  
  	rctl = E1000_READ_REG(hw, E1000_RCTL);
  
  	rctl &= ~(3 << E1000_RCTL_MO_SHIFT);
  	rctl &= ~(E1000_RCTL_LBM_TCVR | E1000_RCTL_LBM_MAC);
  
  	rctl |= E1000_RCTL_EN | E1000_RCTL_BAM | E1000_RCTL_RDMTS_HALF |
  		(hw->mac.mc_filter_type << E1000_RCTL_MO_SHIFT);
  
  	/*
  	 * enable stripping of CRC. It's unlikely this will break BMC
  	 * redirection as it did with e1000. Newer features require
  	 * that the HW strips the CRC.
  	 */
  	rctl |= E1000_RCTL_SECRC;
  
  	/* disable store bad packets and clear size bits. */
  	rctl &= ~(E1000_RCTL_SBP | E1000_RCTL_SZ_256);
  
  	/* enable LPE to prevent packets larger than max_frame_size */
  	rctl |= E1000_RCTL_LPE;
  
  	/* disable queue 0 to prevent tail write w/o re-config */
  	E1000_WRITE_REG(hw, E1000_RXDCTL(0), 0);
  
  	/* Attention!!!  For SR-IOV PF driver operations you must enable
  	 * queue drop for all VF and PF queues to prevent head of line blocking
  	 * if an un-trusted VF does not provide descriptors to hardware.
  	 */
  	if (adapter->vfs_allocated_count) {
  		/* set all queue drop enable bits */
  		E1000_WRITE_REG(hw, E1000_QDE, ALL_QUEUES);
  	}
  
  	E1000_WRITE_REG(hw, E1000_RCTL, rctl);
  }
  
  static inline int igb_set_vf_rlpml(struct igb_adapter *adapter, int size,
                                     int vfn)
  {
  	struct e1000_hw *hw = &adapter->hw;
  	u32 vmolr;
  
  	/* if it isn't the PF check to see if VFs are enabled and
  	 * increase the size to support vlan tags */
  	if (vfn < adapter->vfs_allocated_count &&
  	    adapter->vf_data[vfn].vlans_enabled)
  		size += VLAN_HLEN;
  
  #ifdef CONFIG_IGB_VMDQ_NETDEV
  	if (vfn >= adapter->vfs_allocated_count) {
  		int queue = vfn - adapter->vfs_allocated_count;
  		struct igb_vmdq_adapter *vadapter;
  
  		vadapter = netdev_priv(adapter->vmdq_netdev[queue-1]);
  		if (vadapter->vlgrp)
  			size += VLAN_HLEN;
  	}
  #endif
  	vmolr = E1000_READ_REG(hw, E1000_VMOLR(vfn));
  	vmolr &= ~E1000_VMOLR_RLPML_MASK;
  	vmolr |= size | E1000_VMOLR_LPE;
  	E1000_WRITE_REG(hw, E1000_VMOLR(vfn), vmolr);
  
  	return 0;
  }
  
  /**
   * igb_rlpml_set - set maximum receive packet size
   * @adapter: board private structure
   *
   * Configure maximum receivable packet size.
   **/
  static void igb_rlpml_set(struct igb_adapter *adapter)
  {
  	u32 max_frame_size = adapter->max_frame_size;
  	struct e1000_hw *hw = &adapter->hw;
  	u16 pf_id = adapter->vfs_allocated_count;
  
  	if (adapter->vmdq_pools && hw->mac.type != e1000_82575) {
  		int i;
  		for (i = 0; i < adapter->vmdq_pools; i++)
  			igb_set_vf_rlpml(adapter, max_frame_size, pf_id + i);
  		/*
  		 * If we're in VMDQ or SR-IOV mode, then set global RLPML
  		 * to our max jumbo frame size, in case we need to enable
  		 * jumbo frames on one of the rings later.
  		 * This will not pass over-length frames into the default
  		 * queue because it's gated by the VMOLR.RLPML.
  		 */
  		max_frame_size = MAX_JUMBO_FRAME_SIZE;
  	}
  	/* Set VF RLPML for the PF device. */
  	if (adapter->vfs_allocated_count)
  		igb_set_vf_rlpml(adapter, max_frame_size, pf_id);
  
  	E1000_WRITE_REG(hw, E1000_RLPML, max_frame_size);
  }
  
  static inline void igb_set_vf_vlan_strip(struct igb_adapter *adapter,
  					int vfn, bool enable)
  {
  	struct e1000_hw *hw = &adapter->hw;
  	u32 val;
  	void __iomem *reg;
  
  	if (hw->mac.type < e1000_82576)
  		return;
  
  	if (hw->mac.type == e1000_i350)
  		reg = hw->hw_addr + E1000_DVMOLR(vfn);
  	else
  		reg = hw->hw_addr + E1000_VMOLR(vfn);
  
  	val = readl(reg);
  	if (enable)
  		val |= E1000_VMOLR_STRVLAN;
  	else
  		val &= ~(E1000_VMOLR_STRVLAN);
  	writel(val, reg);
  }
  static inline void igb_set_vmolr(struct igb_adapter *adapter,
  				 int vfn, bool aupe)
  {
  	struct e1000_hw *hw = &adapter->hw;
  	u32 vmolr;
  
  	/*
  	 * This register exists only on 82576 and newer so if we are older then
  	 * we should exit and do nothing
  	 */
  	if (hw->mac.type < e1000_82576)
  		return;
  
  	vmolr = E1000_READ_REG(hw, E1000_VMOLR(vfn));
  
  	if (aupe)
  		vmolr |= E1000_VMOLR_AUPE;        /* Accept untagged packets */
  	else
  		vmolr &= ~(E1000_VMOLR_AUPE); /* Tagged packets ONLY */
  
  	/* clear all bits that might not be set */
  	vmolr &= ~E1000_VMOLR_RSSE;
  
  	if (adapter->rss_queues > 1 && vfn == adapter->vfs_allocated_count)
  		vmolr |= E1000_VMOLR_RSSE; /* enable RSS */
  
  	vmolr |= E1000_VMOLR_BAM;	   /* Accept broadcast */
  	vmolr |= E1000_VMOLR_LPE;	   /* Accept long packets */
  
  	E1000_WRITE_REG(hw, E1000_VMOLR(vfn), vmolr);
  }
  
  /**
   * igb_configure_rx_ring - Configure a receive ring after Reset
   * @adapter: board private structure
   * @ring: receive ring to be configured
   *
   * Configure the Rx unit of the MAC after a reset.
   **/
  void igb_configure_rx_ring(struct igb_adapter *adapter,
                             struct igb_ring *ring)
  {
  	struct e1000_hw *hw = &adapter->hw;
  	u64 rdba = ring->dma;
  	int reg_idx = ring->reg_idx;
  	u32 srrctl = 0, rxdctl = 0;
  
  #ifdef CONFIG_IGB_DISABLE_PACKET_SPLIT
  	/*
  	 * RLPML prevents us from receiving a frame larger than max_frame so
  	 * it is safe to just set the rx_buffer_len to max_frame without the
  	 * risk of an skb over panic.
  	 */
  	ring->rx_buffer_len = max_t(u32, adapter->max_frame_size,
  				    MAXIMUM_ETHERNET_VLAN_SIZE);
  
  #endif
  	/* disable the queue */
  	E1000_WRITE_REG(hw, E1000_RXDCTL(reg_idx), 0);
  
  	/* Set DMA base address registers */
  	E1000_WRITE_REG(hw, E1000_RDBAL(reg_idx),
  	                rdba & 0x00000000ffffffffULL);
  	E1000_WRITE_REG(hw, E1000_RDBAH(reg_idx), rdba >> 32);
  	E1000_WRITE_REG(hw, E1000_RDLEN(reg_idx),
  	               ring->count * sizeof(union e1000_adv_rx_desc));
  
  	/* initialize head and tail */
  	ring->tail = hw->hw_addr + E1000_RDT(reg_idx);
  	E1000_WRITE_REG(hw, E1000_RDH(reg_idx), 0);
  	writel(0, ring->tail);
  
  	/* reset next-to- use/clean to place SW in sync with hardwdare */
  	ring->next_to_clean = 0;
  	ring->next_to_use = 0;
  #ifndef CONFIG_IGB_DISABLE_PACKET_SPLIT
  	ring->next_to_alloc = 0;
  
  #endif
  	/* set descriptor configuration */
  #ifndef CONFIG_IGB_DISABLE_PACKET_SPLIT
  	srrctl = IGB_RX_HDR_LEN << E1000_SRRCTL_BSIZEHDRSIZE_SHIFT;
  	srrctl |= IGB_RX_BUFSZ >> E1000_SRRCTL_BSIZEPKT_SHIFT;
  #else /* CONFIG_IGB_DISABLE_PACKET_SPLIT */
  	srrctl = ALIGN(ring->rx_buffer_len, 1024) >>
  	         E1000_SRRCTL_BSIZEPKT_SHIFT;
  #endif /* CONFIG_IGB_DISABLE_PACKET_SPLIT */
  	srrctl |= E1000_SRRCTL_DESCTYPE_ADV_ONEBUF;
  #ifdef HAVE_PTP_1588_CLOCK
  	if (hw->mac.type >= e1000_82580)
  		srrctl |= E1000_SRRCTL_TIMESTAMP;
  #endif /* HAVE_PTP_1588_CLOCK */
  	/*
  	 * We should set the drop enable bit if:
  	 *  SR-IOV is enabled
  	 *   or
  	 *  Flow Control is disabled and number of RX queues > 1
  	 *
  	 *  This allows us to avoid head of line blocking for security
  	 *  and performance reasons.
  	 */
  	if (adapter->vfs_allocated_count ||
  	    (adapter->num_rx_queues > 1 &&
  	     (hw->fc.requested_mode == e1000_fc_none ||
  	      hw->fc.requested_mode == e1000_fc_rx_pause)))
  		srrctl |= E1000_SRRCTL_DROP_EN;
  
  	E1000_WRITE_REG(hw, E1000_SRRCTL(reg_idx), srrctl);
  
  	/* set filtering for VMDQ pools */
  	igb_set_vmolr(adapter, reg_idx & 0x7, true);
  
  	rxdctl |= IGB_RX_PTHRESH;
  	rxdctl |= IGB_RX_HTHRESH << 8;
  	rxdctl |= IGB_RX_WTHRESH << 16;
  
  	/* enable receive descriptor fetching */
  	rxdctl |= E1000_RXDCTL_QUEUE_ENABLE;
  	E1000_WRITE_REG(hw, E1000_RXDCTL(reg_idx), rxdctl);
  }
  
  /**
   * igb_configure_rx - Configure receive Unit after Reset
   * @adapter: board private structure
   *
   * Configure the Rx unit of the MAC after a reset.
   **/
  static void igb_configure_rx(struct igb_adapter *adapter)
  {
  	int i;
  
  	/* set UTA to appropriate mode */
  	igb_set_uta(adapter);
  
  	igb_full_sync_mac_table(adapter);
  	/* Setup the HW Rx Head and Tail Descriptor Pointers and
  	 * the Base and Length of the Rx Descriptor Ring */
  	for (i = 0; i < adapter->num_rx_queues; i++)
  		igb_configure_rx_ring(adapter, adapter->rx_ring[i]);
  }
  
  /**
   * igb_free_tx_resources - Free Tx Resources per Queue
   * @tx_ring: Tx descriptor ring for a specific queue
   *
   * Free all transmit software resources
   **/
  void igb_free_tx_resources(struct igb_ring *tx_ring)
  {
  	igb_clean_tx_ring(tx_ring);
  
  	vfree(tx_ring->tx_buffer_info);
  	tx_ring->tx_buffer_info = NULL;
  
  	/* if not set, then don't free */
  	if (!tx_ring->desc)
  		return;
  
  	dma_free_coherent(tx_ring->dev, tx_ring->size,
  			  tx_ring->desc, tx_ring->dma);
  
  	tx_ring->desc = NULL;
  }
  
  /**
   * igb_free_all_tx_resources - Free Tx Resources for All Queues
   * @adapter: board private structure
   *
   * Free all transmit software resources
   **/
  static void igb_free_all_tx_resources(struct igb_adapter *adapter)
  {
  	int i;
  
  	for (i = 0; i < adapter->num_tx_queues; i++)
  		igb_free_tx_resources(adapter->tx_ring[i]);
  }
  
  void igb_unmap_and_free_tx_resource(struct igb_ring *ring,
  				    struct igb_tx_buffer *tx_buffer)
  {
  	if (tx_buffer->skb) {
  		dev_kfree_skb_any(tx_buffer->skb);
  		if (dma_unmap_len(tx_buffer, len))
  			dma_unmap_single(ring->dev,
  			                 dma_unmap_addr(tx_buffer, dma),
  			                 dma_unmap_len(tx_buffer, len),
  			                 DMA_TO_DEVICE);
  	} else if (dma_unmap_len(tx_buffer, len)) {
  		dma_unmap_page(ring->dev,
  		               dma_unmap_addr(tx_buffer, dma),
  		               dma_unmap_len(tx_buffer, len),
  		               DMA_TO_DEVICE);
  	}
  	tx_buffer->next_to_watch = NULL;
  	tx_buffer->skb = NULL;
  	dma_unmap_len_set(tx_buffer, len, 0);
  	/* buffer_info must be completely set up in the transmit path */
  }
  
  /**
   * igb_clean_tx_ring - Free Tx Buffers
   * @tx_ring: ring to be cleaned
   **/
  static void igb_clean_tx_ring(struct igb_ring *tx_ring)
  {
  	struct igb_tx_buffer *buffer_info;
  	unsigned long size;
  	u16 i;
  
  	if (!tx_ring->tx_buffer_info)
  		return;
  	/* Free all the Tx ring sk_buffs */
  
  	for (i = 0; i < tx_ring->count; i++) {
  		buffer_info = &tx_ring->tx_buffer_info[i];
  		igb_unmap_and_free_tx_resource(tx_ring, buffer_info);
  	}
  
  	netdev_tx_reset_queue(txring_txq(tx_ring));
  
  	size = sizeof(struct igb_tx_buffer) * tx_ring->count;
  	memset(tx_ring->tx_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;
  }
  
  /**
   * igb_clean_all_tx_rings - Free Tx Buffers for all queues
   * @adapter: board private structure
   **/
  static void igb_clean_all_tx_rings(struct igb_adapter *adapter)
  {
  	int i;
  
  	for (i = 0; i < adapter->num_tx_queues; i++)
  		igb_clean_tx_ring(adapter->tx_ring[i]);
  }
  
  /**
   * igb_free_rx_resources - Free Rx Resources
   * @rx_ring: ring to clean the resources from
   *
   * Free all receive software resources
   **/
  void igb_free_rx_resources(struct igb_ring *rx_ring)
  {
  	igb_clean_rx_ring(rx_ring);
  
  	vfree(rx_ring->rx_buffer_info);
  	rx_ring->rx_buffer_info = NULL;
  
  	/* if not set, then don't free */
  	if (!rx_ring->desc)
  		return;
  
  	dma_free_coherent(rx_ring->dev, rx_ring->size,
  			  rx_ring->desc, rx_ring->dma);
  
  	rx_ring->desc = NULL;
  }
  
  /**
   * igb_free_all_rx_resources - Free Rx Resources for All Queues
   * @adapter: board private structure
   *
   * Free all receive software resources
   **/
  static void igb_free_all_rx_resources(struct igb_adapter *adapter)
  {
  	int i;
  
  	for (i = 0; i < adapter->num_rx_queues; i++)
  		igb_free_rx_resources(adapter->rx_ring[i]);
  }
  
  /**
   * igb_clean_rx_ring - Free Rx Buffers per Queue
   * @rx_ring: ring to free buffers from
   **/
  void igb_clean_rx_ring(struct igb_ring *rx_ring)
  {
  	unsigned long size;
  	u16 i;
  
  	if (!rx_ring->rx_buffer_info)
  		return;
  
  #ifndef CONFIG_IGB_DISABLE_PACKET_SPLIT
  	if (rx_ring->skb)
  		dev_kfree_skb(rx_ring->skb);
  	rx_ring->skb = NULL;
  
  #endif
  	/* Free all the Rx ring sk_buffs */
  	for (i = 0; i < rx_ring->count; i++) {
  		struct igb_rx_buffer *buffer_info = &rx_ring->rx_buffer_info[i];
  #ifdef CONFIG_IGB_DISABLE_PACKET_SPLIT
  		if (buffer_info->dma) {
  			dma_unmap_single(rx_ring->dev,
  			                 buffer_info->dma,
  					 rx_ring->rx_buffer_len,
  					 DMA_FROM_DEVICE);
  			buffer_info->dma = 0;
  		}
  
  		if (buffer_info->skb) {
  			dev_kfree_skb(buffer_info->skb);
  			buffer_info->skb = NULL;
  		}
  #else
  		if (!buffer_info->page)
  			continue;
  
  		dma_unmap_page(rx_ring->dev,
  			       buffer_info->dma,
  			       PAGE_SIZE,
  			       DMA_FROM_DEVICE);
  		__free_page(buffer_info->page);
  
  		buffer_info->page = NULL;
  #endif
  	}
  
  	size = sizeof(struct igb_rx_buffer) * rx_ring->count;
  	memset(rx_ring->rx_buffer_info, 0, size);
  
  	/* Zero out the descriptor ring */
  	memset(rx_ring->desc, 0, rx_ring->size);
  
  	rx_ring->next_to_alloc = 0;
  	rx_ring->next_to_clean = 0;
  	rx_ring->next_to_use = 0;
  }
  
  /**
   * igb_clean_all_rx_rings - Free Rx Buffers for all queues
   * @adapter: board private structure
   **/
  static void igb_clean_all_rx_rings(struct igb_adapter *adapter)
  {
  	int i;
  
  	for (i = 0; i < adapter->num_rx_queues; i++)
  		igb_clean_rx_ring(adapter->rx_ring[i]);
  }
  
  /**
   * igb_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 igb_set_mac(struct net_device *netdev, void *p)
  {
  	struct igb_adapter *adapter = netdev_priv(netdev);
  	struct e1000_hw *hw = &adapter->hw;
  	struct sockaddr *addr = p;
  
  	if (!is_valid_ether_addr(addr->sa_data))
  		return -EADDRNOTAVAIL;
  
  	igb_del_mac_filter(adapter, hw->mac.addr,
  			   adapter->vfs_allocated_count);
  	memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
  	memcpy(hw->mac.addr, addr->sa_data, netdev->addr_len);
  
  	/* set the correct pool for the new PF MAC address in entry 0 */
  	return igb_add_mac_filter(adapter, hw->mac.addr,
  	                   adapter->vfs_allocated_count);
  }
  
  /**
   * igb_write_mc_addr_list - write multicast addresses to MTA
   * @netdev: network interface device structure
   *
   * Writes multicast address list to the MTA hash table.
   * Returns: -ENOMEM on failure
   *                0 on no addresses written
   *                X on writing X addresses to MTA
   **/
  int igb_write_mc_addr_list(struct net_device *netdev)
  {
  	struct igb_adapter *adapter = netdev_priv(netdev);
  	struct e1000_hw *hw = &adapter->hw;
  #ifdef NETDEV_HW_ADDR_T_MULTICAST
  	struct netdev_hw_addr *ha;
  #else
  	struct dev_mc_list *ha;
  #endif
  	u8  *mta_list;
  	int i, count;
  #ifdef CONFIG_IGB_VMDQ_NETDEV
  	int vm;
  #endif
  	count = netdev_mc_count(netdev);
  #ifdef CONFIG_IGB_VMDQ_NETDEV
  	for (vm = 1; vm < adapter->vmdq_pools; vm++) {
  		if (!adapter->vmdq_netdev[vm])
  			break;
  		if (!netif_running(adapter->vmdq_netdev[vm]))
  			continue;
  		count += netdev_mc_count(adapter->vmdq_netdev[vm]);
  	}
  #endif
  
  	if (!count) {
  		e1000_update_mc_addr_list(hw, NULL, 0);
  		return 0;
  	}
  	mta_list = kzalloc(count * 6, GFP_ATOMIC);
  	if (!mta_list)
  		return -ENOMEM;
  
  	/* The shared function expects a packed array of only addresses. */
  	i = 0;
  	netdev_for_each_mc_addr(ha, netdev)
  #ifdef NETDEV_HW_ADDR_T_MULTICAST
  		memcpy(mta_list + (i++ * ETH_ALEN), ha->addr, ETH_ALEN);
  #else
  		memcpy(mta_list + (i++ * ETH_ALEN), ha->dmi_addr, ETH_ALEN);
  #endif
  #ifdef CONFIG_IGB_VMDQ_NETDEV
  	for (vm = 1; vm < adapter->vmdq_pools; vm++) {
  		if (!adapter->vmdq_netdev[vm])
  			break;
  		if (!netif_running(adapter->vmdq_netdev[vm]) ||
  		    !netdev_mc_count(adapter->vmdq_netdev[vm]))
  			continue;
  		netdev_for_each_mc_addr(ha, adapter->vmdq_netdev[vm])
  #ifdef NETDEV_HW_ADDR_T_MULTICAST
  			memcpy(mta_list + (i++ * ETH_ALEN),
  			       ha->addr, ETH_ALEN);
  #else
  			memcpy(mta_list + (i++ * ETH_ALEN),
  			       ha->dmi_addr, ETH_ALEN);
  #endif
  	}
  #endif
  	e1000_update_mc_addr_list(hw, mta_list, i);
  	kfree(mta_list);
  
  	return count;
  }
  
  void igb_rar_set(struct igb_adapter *adapter, u32 index)
  {
  	u32 rar_low, rar_high;
  	struct e1000_hw *hw = &adapter->hw;
  	u8 *addr = adapter->mac_table[index].addr;
  	/* HW expects these in little endian so we reverse the byte order
  	 * from network order (big endian) to little endian
  	 */
  	rar_low = ((u32) addr[0] | ((u32) addr[1] << 8) |
  	          ((u32) addr[2] << 16) | ((u32) addr[3] << 24));
  	rar_high = ((u32) addr[4] | ((u32) addr[5] << 8));
  
  	/* Indicate to hardware the Address is Valid. */
  	if (adapter->mac_table[index].state & IGB_MAC_STATE_IN_USE)
  		rar_high |= E1000_RAH_AV;
  
  	if (hw->mac.type == e1000_82575)
  		rar_high |= E1000_RAH_POOL_1 * adapter->mac_table[index].queue;
  	else
  		rar_high |= E1000_RAH_POOL_1 << adapter->mac_table[index].queue;
  
  	E1000_WRITE_REG(hw, E1000_RAL(index), rar_low);
  	E1000_WRITE_FLUSH(hw);
  	E1000_WRITE_REG(hw, E1000_RAH(index), rar_high);
  	E1000_WRITE_FLUSH(hw);
  }
  
  void igb_full_sync_mac_table(struct igb_adapter *adapter)
  {
  	struct e1000_hw *hw = &adapter->hw;
  	int i;
  	for (i = 0; i < hw->mac.rar_entry_count; i++) {
  			igb_rar_set(adapter, i);
  	}
  }
  
  void igb_sync_mac_table(struct igb_adapter *adapter)
  {
  	struct e1000_hw *hw = &adapter->hw;
  	int i;
  	for (i = 0; i < hw->mac.rar_entry_count; i++) {
  		if (adapter->mac_table[i].state & IGB_MAC_STATE_MODIFIED)
  			igb_rar_set(adapter, i);
  		adapter->mac_table[i].state &= ~(IGB_MAC_STATE_MODIFIED);
  	}
  }
  
  int igb_available_rars(struct igb_adapter *adapter)
  {
  	struct e1000_hw *hw = &adapter->hw;
  	int i, count = 0;
  
  	for (i = 0; i < hw->mac.rar_entry_count; i++) {
  		if (adapter->mac_table[i].state == 0)
  			count++;
  	}
  	return count;
  }
  
  #ifdef HAVE_SET_RX_MODE
  /**
   * igb_write_uc_addr_list - write unicast addresses to RAR table
   * @netdev: network interface device structure
   *
   * Writes unicast address list to the RAR table.
   * Returns: -ENOMEM on failure/insufficient address space
   *                0 on no addresses written
   *                X on writing X addresses to the RAR table
   **/
  static int igb_write_uc_addr_list(struct net_device *netdev)
  {
  	struct igb_adapter *adapter = netdev_priv(netdev);
  	unsigned int vfn = adapter->vfs_allocated_count;
  	int count = 0;
  
  	/* return ENOMEM indicating insufficient memory for addresses */
  	if (netdev_uc_count(netdev) > igb_available_rars(adapter))
  		return -ENOMEM;
  	if (!netdev_uc_empty(netdev)) {
  #ifdef NETDEV_HW_ADDR_T_UNICAST
  		struct netdev_hw_addr *ha;
  #else
  		struct dev_mc_list *ha;
  #endif
  		netdev_for_each_uc_addr(ha, netdev) {
  #ifdef NETDEV_HW_ADDR_T_UNICAST
  			igb_del_mac_filter(adapter, ha->addr, vfn);
  			igb_add_mac_filter(adapter, ha->addr, vfn);
  #else
  			igb_del_mac_filter(adapter, ha->da_addr, vfn);
  			igb_add_mac_filter(adapter, ha->da_addr, vfn);
  #endif
  			count++;
  		}
  	}
  	return count;
  }
  
  #endif /* HAVE_SET_RX_MODE */
  /**
   * igb_set_rx_mode - Secondary Unicast, Multicast and Promiscuous mode set
   * @netdev: network interface device structure
   *
   * The set_rx_mode entry point is called whenever the unicast or multicast
   * address lists or the network interface flags are updated.  This routine is
   * responsible for configuring the hardware for proper unicast, multicast,
   * promiscuous mode, and all-multi behavior.
   **/
  static void igb_set_rx_mode(struct net_device *netdev)
  {
  	struct igb_adapter *adapter = netdev_priv(netdev);
  	struct e1000_hw *hw = &adapter->hw;
  	unsigned int vfn = adapter->vfs_allocated_count;
  	u32 rctl, vmolr = 0;
  	int count;
  
  	/* Check for Promiscuous and All Multicast modes */
  	rctl = E1000_READ_REG(hw, E1000_RCTL);
  
  	/* clear the effected bits */
  	rctl &= ~(E1000_RCTL_UPE | E1000_RCTL_MPE | E1000_RCTL_VFE);
  
  	if (netdev->flags & IFF_PROMISC) {
  		rctl |= (E1000_RCTL_UPE | E1000_RCTL_MPE);
  		vmolr |= (E1000_VMOLR_ROPE | E1000_VMOLR_MPME);
  		/* retain VLAN HW filtering if in VT mode */
  		if (adapter->vfs_allocated_count || adapter->vmdq_pools)
  			rctl |= E1000_RCTL_VFE;
  	} else {
  		if (netdev->flags & IFF_ALLMULTI) {
  			rctl |= E1000_RCTL_MPE;
  			vmolr |= E1000_VMOLR_MPME;
  		} else {
  			/*
  			 * Write addresses to the MTA, if the attempt fails
  			 * then we should just turn on promiscuous mode so
  			 * that we can at least receive multicast traffic
  			 */
  			count = igb_write_mc_addr_list(netdev);
  			if (count < 0) {
  				rctl |= E1000_RCTL_MPE;
  				vmolr |= E1000_VMOLR_MPME;
  			} else if (count) {
  				vmolr |= E1000_VMOLR_ROMPE;
  			}
  		}
  #ifdef HAVE_SET_RX_MODE
  		/*
  		 * Write addresses to available RAR registers, if there is not
  		 * sufficient space to store all the addresses then enable
  		 * unicast promiscuous mode
  		 */
  		count = igb_write_uc_addr_list(netdev);
  		if (count < 0) {
  			rctl |= E1000_RCTL_UPE;
  			vmolr |= E1000_VMOLR_ROPE;
  		}
  #endif /* HAVE_SET_RX_MODE */
  		rctl |= E1000_RCTL_VFE;
  	}
  	E1000_WRITE_REG(hw, E1000_RCTL, rctl);
  
  	/*
  	 * In order to support SR-IOV and eventually VMDq it is necessary to set
  	 * the VMOLR to enable the appropriate modes.  Without this workaround
  	 * we will have issues with VLAN tag stripping not being done for frames
  	 * that are only arriving because we are the default pool
  	 */
  	if (hw->mac.type < e1000_82576)
  		return;
  
  	vmolr |= E1000_READ_REG(hw, E1000_VMOLR(vfn)) &
  	         ~(E1000_VMOLR_ROPE | E1000_VMOLR_MPME | E1000_VMOLR_ROMPE);
  	E1000_WRITE_REG(hw, E1000_VMOLR(vfn), vmolr);
  	igb_restore_vf_multicasts(adapter);
  }
  
  static void igb_check_wvbr(struct igb_adapter *adapter)
  {
  	struct e1000_hw *hw = &adapter->hw;
  	u32 wvbr = 0;
  
  	switch (hw->mac.type) {
  	case e1000_82576:
  	case e1000_i350:
  		if (!(wvbr = E1000_READ_REG(hw, E1000_WVBR)))
  			return;
  		break;
  	default:
  		break;
  	}
  
  	adapter->wvbr |= wvbr;
  }
  
  #define IGB_STAGGERED_QUEUE_OFFSET 8
  
  static void igb_spoof_check(struct igb_adapter *adapter)
  {
  	int j;
  
  	if (!adapter->wvbr)
  		return;
  
  	switch (adapter->hw.mac.type) {
  	case e1000_82576:
  		for (j = 0; j < adapter->vfs_allocated_count; j++) {
  			if (adapter->wvbr & (1 << j) ||
  			    adapter->wvbr & (1 << (j + IGB_STAGGERED_QUEUE_OFFSET))) {
  				DPRINTK(DRV, WARNING,
  					"Spoof event(s) detected on VF %d\n", j);
  				adapter->wvbr &=
  					~((1 << j) |
  					  (1 << (j + IGB_STAGGERED_QUEUE_OFFSET)));
  			}
  		}
  		break;
  	case e1000_i350:
  		for (j = 0; j < adapter->vfs_allocated_count; j++) {
  			if (adapter->wvbr & (1 << j)) {
  				DPRINTK(DRV, WARNING,
  					"Spoof event(s) detected on VF %d\n", j);
  				adapter->wvbr &= ~(1 << j);
  			}
  		}
  		break;
  	default:
  		break;
  	}
  }
  
  /* Need to wait a few seconds after link up to get diagnostic information from
   * the phy */
  #ifdef HAVE_TIMER_SETUP
  static void igb_update_phy_info(struct timer_list *t)
  {
  	struct igb_adapter *adapter = from_timer(adapter, t, phy_info_timer);
  #else
  static void igb_update_phy_info(unsigned long data)
  {
  	struct igb_adapter *adapter = (struct igb_adapter *) data;
  #endif
  	e1000_get_phy_info(&adapter->hw);
  }
  
  /**
   * igb_has_link - check shared code for link and determine up/down
   * @adapter: pointer to driver private info
   **/
  bool igb_has_link(struct igb_adapter *adapter)
  {
  	struct e1000_hw *hw = &adapter->hw;
  	bool link_active = FALSE;
  
  	/* get_link_status is set on LSC (link status) interrupt or
  	 * rx sequence error interrupt.  get_link_status will stay
  	 * false until the e1000_check_for_link establishes link
  	 * for copper adapters ONLY
  	 */
  	switch (hw->phy.media_type) {
  	case e1000_media_type_copper:
  		if (!hw->mac.get_link_status)
  			return true;
  	case e1000_media_type_internal_serdes:
  		e1000_check_for_link(hw);
  		link_active = !hw->mac.get_link_status;
  		break;
  	case e1000_media_type_unknown:
  	default:
  		break;
  	}
  
  	if (((hw->mac.type == e1000_i210) ||
  	     (hw->mac.type == e1000_i211)) &&
  	     (hw->phy.id == I210_I_PHY_ID)) {
  		if (!netif_carrier_ok(adapter->netdev)) {
  			adapter->flags &= ~IGB_FLAG_NEED_LINK_UPDATE;
  		} else if (!(adapter->flags & IGB_FLAG_NEED_LINK_UPDATE)) {
  			adapter->flags |= IGB_FLAG_NEED_LINK_UPDATE;
  			adapter->link_check_timeout = jiffies;
  		}
  	}
  
  	return link_active;
  }
  
  /**
   * igb_watchdog - Timer Call-back
   * @data: pointer to adapter cast into an unsigned long
   **/
  #ifdef HAVE_TIMER_SETUP
  static void igb_watchdog(struct timer_list *t)
  {
  	struct igb_adapter *adapter = from_timer(adapter, t, watchdog_timer);
  #else
  static void igb_watchdog(unsigned long data)
  {
  	struct igb_adapter *adapter = (struct igb_adapter *)data;
  #endif
  	/* Do the rest outside of interrupt context */
  	schedule_work(&adapter->watchdog_task);
  }
  
  static void igb_watchdog_task(struct work_struct *work)
  {
  	struct igb_adapter *adapter = container_of(work,
  	                                           struct igb_adapter,
                                                     watchdog_task);
  	struct e1000_hw *hw = &adapter->hw;
  	struct net_device *netdev = adapter->netdev;
  	u32 link;
  	int i;
  	u32 thstat, ctrl_ext;
  	u32 connsw;
  
  	link = igb_has_link(adapter);
  	/* Force link down if we have fiber to swap to */
  	if (adapter->flags & IGB_FLAG_MAS_ENABLE) {
  		if (hw->phy.media_type == e1000_media_type_copper) {
  			connsw = E1000_READ_REG(hw, E1000_CONNSW);
  			if (!(connsw & E1000_CONNSW_AUTOSENSE_EN))
  				link = 0;
  		}
  	}
  
  	if (adapter->flags & IGB_FLAG_NEED_LINK_UPDATE) {
  		if (time_after(jiffies, (adapter->link_check_timeout + HZ)))
  			adapter->flags &= ~IGB_FLAG_NEED_LINK_UPDATE;
  		else
  			link = FALSE;
  	}
  
  	if (link) {
  		/* Perform a reset if the media type changed. */
  		if (hw->dev_spec._82575.media_changed) {
  			hw->dev_spec._82575.media_changed = false;
  			adapter->flags |= IGB_FLAG_MEDIA_RESET;
  			igb_reset(adapter);
  		}
  
  		/* Cancel scheduled suspend requests. */
  		pm_runtime_resume(netdev->dev.parent);
  
  		if (!netif_carrier_ok(netdev)) {
  			u32 ctrl;
  			e1000_get_speed_and_duplex(hw,
  			                           &adapter->link_speed,
  			                           &adapter->link_duplex);
  
  			ctrl = E1000_READ_REG(hw, E1000_CTRL);
  			/* Links status message must follow this format */
  			printk(KERN_INFO "igb: %s NIC Link is Up %d Mbps %s, "
  				 "Flow Control: %s\n",
  			       netdev->name,
  			       adapter->link_speed,
  			       adapter->link_duplex == FULL_DUPLEX ?
  				 "Full Duplex" : "Half Duplex",
  			       ((ctrl & E1000_CTRL_TFCE) &&
  			        (ctrl & E1000_CTRL_RFCE)) ? "RX/TX":
  			       ((ctrl & E1000_CTRL_RFCE) ?  "RX" :
  			       ((ctrl & E1000_CTRL_TFCE) ?  "TX" : "None")));
  			/* adjust timeout factor according to speed/duplex */
  			adapter->tx_timeout_factor = 1;
  			switch (adapter->link_speed) {
  			case SPEED_10:
  				adapter->tx_timeout_factor = 14;
  				break;
  			case SPEED_100:
  				/* maybe add some timeout factor ? */
  				break;
  			default:
  				break;
  			}
  
  			netif_carrier_on(netdev);
  			netif_tx_wake_all_queues(netdev);
  
  			igb_ping_all_vfs(adapter);
  #ifdef IFLA_VF_MAX
  			igb_check_vf_rate_limit(adapter);
  #endif /* IFLA_VF_MAX */
  
  			/* link state has changed, schedule phy info update */
  			if (!test_bit(__IGB_DOWN, &adapter->state))
  				mod_timer(&adapter->phy_info_timer,
  					  round_jiffies(jiffies + 2 * HZ));
  		}
  	} else {
  		if (netif_carrier_ok(netdev)) {
  			adapter->link_speed = 0;
  			adapter->link_duplex = 0;
  			/* check for thermal sensor event on i350 */
  			if (hw->mac.type == e1000_i350) {
  				thstat = E1000_READ_REG(hw, E1000_THSTAT);
  				ctrl_ext = E1000_READ_REG(hw, E1000_CTRL_EXT);
  				if ((hw->phy.media_type ==
  					e1000_media_type_copper) &&
  					!(ctrl_ext &
  					E1000_CTRL_EXT_LINK_MODE_SGMII)) {
  					if (thstat & E1000_THSTAT_PWR_DOWN) {
  						printk(KERN_ERR "igb: %s The "
  						"network adapter was stopped "
  						"because it overheated.\n",
  						netdev->name);
  					}
  					if (thstat & E1000_THSTAT_LINK_THROTTLE) {
  						printk(KERN_INFO
  							"igb: %s The network "
  							"adapter supported "
  							"link speed "
  							"was downshifted "
  							"because it "
  							"overheated.\n",
  							netdev->name);
  					}
  				}
  			}
  
  			/* Links status message must follow this format */
  			printk(KERN_INFO "igb: %s NIC Link is Down\n",
  			       netdev->name);
  			netif_carrier_off(netdev);
  			netif_tx_stop_all_queues(netdev);
  
  			igb_ping_all_vfs(adapter);
  
  			/* link state has changed, schedule phy info update */
  			if (!test_bit(__IGB_DOWN, &adapter->state))
  				mod_timer(&adapter->phy_info_timer,
  					  round_jiffies(jiffies + 2 * HZ));
  			/* link is down, time to check for alternate media */
  			if (adapter->flags & IGB_FLAG_MAS_ENABLE) {
  				igb_check_swap_media(adapter);
  				if (adapter->flags & IGB_FLAG_MEDIA_RESET) {
  					schedule_work(&adapter->reset_task);
  					/* return immediately */
  					return;
  				}
  			}
  			pm_schedule_suspend(netdev->dev.parent,
  					    MSEC_PER_SEC * 5);
  
  		/* also check for alternate media here */
  		} else if (!netif_carrier_ok(netdev) &&
  			   (adapter->flags & IGB_FLAG_MAS_ENABLE)) {
  			hw->mac.ops.power_up_serdes(hw);
  			igb_check_swap_media(adapter);
  			if (adapter->flags & IGB_FLAG_MEDIA_RESET) {
  				schedule_work(&adapter->reset_task);
  				/* return immediately */
  				return;
  			}
  		}
  	}
  
  	igb_update_stats(adapter);
  
  	for (i = 0; i < adapter->num_tx_queues; i++) {
  		struct igb_ring *tx_ring = adapter->tx_ring[i];
  		if (!netif_carrier_ok(netdev)) {
  			/* 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). */
  			if (igb_desc_unused(tx_ring) + 1 < tx_ring->count) {
  				adapter->tx_timeout_count++;
  				schedule_work(&adapter->reset_task);
  				/* return immediately since reset is imminent */
  				return;
  			}
  		}
  
  		/* Force detection of hung controller every watchdog period */
  		set_bit(IGB_RING_FLAG_TX_DETECT_HANG, &tx_ring->flags);
  	}
  
  	/* Cause software interrupt to ensure rx ring is cleaned */
  	if (adapter->msix_entries) {
  		u32 eics = 0;
  		for (i = 0; i < adapter->num_q_vectors; i++)
  			eics |= adapter->q_vector[i]->eims_value;
  		E1000_WRITE_REG(hw, E1000_EICS, eics);
  	} else {
  		E1000_WRITE_REG(hw, E1000_ICS, E1000_ICS_RXDMT0);
  	}
  
  	igb_spoof_check(adapter);
  
  	/* Reset the timer */
  	if (!test_bit(__IGB_DOWN, &adapter->state)) {
  		if (adapter->flags & IGB_FLAG_NEED_LINK_UPDATE)
  			mod_timer(&adapter->watchdog_timer,
  				  round_jiffies(jiffies +  HZ));
  		else
  			mod_timer(&adapter->watchdog_timer,
  				  round_jiffies(jiffies + 2 * HZ));
  	}
  }
  
  static void igb_dma_err_task(struct work_struct *work)
  {
  	struct igb_adapter *adapter = container_of(work,
  	                                           struct igb_adapter,
                                                     dma_err_task);
  	int vf;
  	struct e1000_hw *hw = &adapter->hw;
  	struct net_device *netdev = adapter->netdev;
  	u32 hgptc;
  	u32 ciaa, ciad;
  
  	hgptc = E1000_READ_REG(hw, E1000_HGPTC);
  	if (hgptc) /* If incrementing then no need for the check below */
  		goto dma_timer_reset;
  	/*
  	 * Check to see if a bad DMA write target from an errant or
  	 * malicious VF has caused a PCIe error.  If so then we can
  	 * issue a VFLR to the offending VF(s) and then resume without
  	 * requesting a full slot reset.
  	 */
  
  	for (vf = 0; vf < adapter->vfs_allocated_count; vf++) {
  		ciaa = (vf << 16) | 0x80000000;
  		/* 32 bit read so align, we really want status at offset 6 */
  		ciaa |= PCI_COMMAND;
  		E1000_WRITE_REG(hw, E1000_CIAA, ciaa);
  		ciad = E1000_READ_REG(hw, E1000_CIAD);
  		ciaa &= 0x7FFFFFFF;
  		/* disable debug mode asap after reading data */
  		E1000_WRITE_REG(hw, E1000_CIAA, ciaa);
  		/* Get the upper 16 bits which will be the PCI status reg */
  		ciad >>= 16;
  		if (ciad & (PCI_STATUS_REC_MASTER_ABORT |
  			    PCI_STATUS_REC_TARGET_ABORT |
  			    PCI_STATUS_SIG_SYSTEM_ERROR)) {
  			netdev_err(netdev, "VF %d suffered error\n", vf);
  			/* Issue VFLR */
  			ciaa = (vf << 16) | 0x80000000;
  			ciaa |= 0xA8;
  			E1000_WRITE_REG(hw, E1000_CIAA, ciaa);
  			ciad = 0x00008000;  /* VFLR */
  			E1000_WRITE_REG(hw, E1000_CIAD, ciad);
  			ciaa &= 0x7FFFFFFF;
  			E1000_WRITE_REG(hw, E1000_CIAA, ciaa);
  		}
  	}
  dma_timer_reset:
  	/* Reset the timer */
  	if (!test_bit(__IGB_DOWN, &adapter->state))
  		mod_timer(&adapter->dma_err_timer,
  			  round_jiffies(jiffies + HZ / 10));
  }
  
  /**
   * igb_dma_err_timer - Timer Call-back
   * @data: pointer to adapter cast into an unsigned long
   **/
  #ifdef HAVE_TIMER_SETUP
  static void igb_dma_err_timer(struct timer_list *t)
  {
  	struct igb_adapter *adapter = from_timer(adapter, t, dma_err_timer);
  #else
  static void igb_dma_err_timer(unsigned long data)
  {
  	struct igb_adapter *adapter = (struct igb_adapter *)data;
  #endif
  	/* Do the rest outside of interrupt context */
  	schedule_work(&adapter->dma_err_task);
  }
  
  enum latency_range {
  	lowest_latency = 0,
  	low_latency = 1,
  	bulk_latency = 2,
  	latency_invalid = 255
  };
  
  /**
   * igb_update_ring_itr - update the dynamic ITR value based on packet size
   *
   *      Stores a new ITR value based on strictly on packet size.  This
   *      algorithm is less sophisticated than that used in igb_update_itr,
   *      due to the difficulty of synchronizing statistics across multiple
   *      receive rings.  The divisors and thresholds used by this function
   *      were determined based on theoretical maximum wire speed and testing
   *      data, in order to minimize response time while increasing bulk
   *      throughput.
   *      This functionality is controlled by the InterruptThrottleRate module
   *      parameter (see igb_param.c)
   *      NOTE:  This function is called only when operating in a multiqueue
   *             receive environment.
   * @q_vector: pointer to q_vector
   **/
  static void igb_update_ring_itr(struct igb_q_vector *q_vector)
  {
  	int new_val = q_vector->itr_val;
  	int avg_wire_size = 0;
  	struct igb_adapter *adapter = q_vector->adapter;
  	unsigned int packets;
  
  	/* For non-gigabit speeds, just fix the interrupt rate at 4000
  	 * ints/sec - ITR timer value of 120 ticks.
  	 */
  	switch (adapter->link_speed) {
  	case SPEED_10:
  	case SPEED_100:
  		new_val = IGB_4K_ITR;
  		goto set_itr_val;
  	default:
  		break;
  	}
  
  	packets = q_vector->rx.total_packets;
  	if (packets)
  		avg_wire_size = q_vector->rx.total_bytes / packets;
  
  	packets = q_vector->tx.total_packets;
  	if (packets)
  		avg_wire_size = max_t(u32, avg_wire_size,
  		                      q_vector->tx.total_bytes / packets);
  
  	/* if avg_wire_size isn't set no work was done */
  	if (!avg_wire_size)
  		goto clear_counts;
  
  	/* Add 24 bytes to size to account for CRC, preamble, and gap */
  	avg_wire_size += 24;
  
  	/* Don't starve jumbo frames */
  	avg_wire_size = min(avg_wire_size, 3000);
  
  	/* Give a little boost to mid-size frames */
  	if ((avg_wire_size > 300) && (avg_wire_size < 1200))
  		new_val = avg_wire_size / 3;
  	else
  		new_val = avg_wire_size / 2;
  
  	/* conservative mode (itr 3) eliminates the lowest_latency setting */
  	if (new_val < IGB_20K_ITR &&
  	    ((q_vector->rx.ring && adapter->rx_itr_setting == 3) ||
  	     (!q_vector->rx.ring && adapter->tx_itr_setting == 3)))
  		new_val = IGB_20K_ITR;
  
  set_itr_val:
  	if (new_val != q_vector->itr_val) {
  		q_vector->itr_val = new_val;
  		q_vector->set_itr = 1;
  	}
  clear_counts:
  	q_vector->rx.total_bytes = 0;
  	q_vector->rx.total_packets = 0;
  	q_vector->tx.total_bytes = 0;
  	q_vector->tx.total_packets = 0;
  }
  
  /**
   * igb_update_itr - update the dynamic ITR value based on statistics
   *      Stores a new ITR value based on packets and byte
   *      counts during the last interrupt.  The advantage of per interrupt
   *      computation is faster updates and more accurate ITR for the current
   *      traffic pattern.  Constants in this function were computed
   *      based on theoretical maximum wire speed and thresholds were set based
   *      on testing data as well as attempting to minimize response time
   *      while increasing bulk throughput.
   *      this functionality is controlled by the InterruptThrottleRate module
   *      parameter (see igb_param.c)
   *      NOTE:  These calculations are only valid when operating in a single-
   *             queue environment.
   * @q_vector: pointer to q_vector
   * @ring_container: ring info to update the itr for
   **/
  static void igb_update_itr(struct igb_q_vector *q_vector,
  			   struct igb_ring_container *ring_container)
  {
  	unsigned int packets = ring_container->total_packets;
  	unsigned int bytes = ring_container->total_bytes;
  	u8 itrval = ring_container->itr;
  
  	/* no packets, exit with status unchanged */
  	if (packets == 0)
  		return;
  
  	switch (itrval) {
  	case lowest_latency:
  		/* handle TSO and jumbo frames */
  		if (bytes/packets > 8000)
  			itrval = bulk_latency;
  		else if ((packets < 5) && (bytes > 512))
  			itrval = low_latency;
  		break;
  	case low_latency:  /* 50 usec aka 20000 ints/s */
  		if (bytes > 10000) {
  			/* this if handles the TSO accounting */
  			if (bytes/packets > 8000) {
  				itrval = bulk_latency;
  			} else if ((packets < 10) || ((bytes/packets) > 1200)) {
  				itrval = bulk_latency;
  			} else if (packets > 35) {
  				itrval = lowest_latency;
  			}
  		} else if (bytes/packets > 2000) {
  			itrval = bulk_latency;
  		} else if (packets <= 2 && bytes < 512) {
  			itrval = lowest_latency;
  		}
  		break;
  	case bulk_latency: /* 250 usec aka 4000 ints/s */
  		if (bytes > 25000) {
  			if (packets > 35)
  				itrval = low_latency;
  		} else if (bytes < 1500) {
  			itrval = low_latency;
  		}
  		break;
  	}
  
  	/* clear work counters since we have the values we need */
  	ring_container->total_bytes = 0;
  	ring_container->total_packets = 0;
  
  	/* write updated itr to ring container */
  	ring_container->itr = itrval;
  }
  
  static void igb_set_itr(struct igb_q_vector *q_vector)
  {
  	struct igb_adapter *adapter = q_vector->adapter;
  	u32 new_itr = q_vector->itr_val;
  	u8 current_itr = 0;
  
  	/* for non-gigabit speeds, just fix the interrupt rate at 4000 */
  	switch (adapter->link_speed) {
  	case SPEED_10:
  	case SPEED_100:
  		current_itr = 0;
  		new_itr = IGB_4K_ITR;
  		goto set_itr_now;
  	default:
  		break;
  	}
  
  	igb_update_itr(q_vector, &q_vector->tx);
  	igb_update_itr(q_vector, &q_vector->rx);
  
  	current_itr = max(q_vector->rx.itr, q_vector->tx.itr);
  
  	/* conservative mode (itr 3) eliminates the lowest_latency setting */
  	if (current_itr == lowest_latency &&
  	    ((q_vector->rx.ring && adapter->rx_itr_setting == 3) ||
  	     (!q_vector->rx.ring && adapter->tx_itr_setting == 3)))
  		current_itr = low_latency;
  
  	switch (current_itr) {
  	/* counts and packets in update_itr are dependent on these numbers */
  	case lowest_latency:
  		new_itr = IGB_70K_ITR; /* 70,000 ints/sec */
  		break;
  	case low_latency:
  		new_itr = IGB_20K_ITR; /* 20,000 ints/sec */
  		break;
  	case bulk_latency:
  		new_itr = IGB_4K_ITR;  /* 4,000 ints/sec */
  		break;
  	default:
  		break;
  	}
  
  set_itr_now:
  	if (new_itr != q_vector->itr_val) {
  		/* this attempts to bias the interrupt rate towards Bulk
  		 * by adding intermediate steps when interrupt rate is
  		 * increasing */
  		new_itr = new_itr > q_vector->itr_val ?
  		             max((new_itr * q_vector->itr_val) /
  		                 (new_itr + (q_vector->itr_val >> 2)),
  				 new_itr) :
  			     new_itr;
  		/* Don't write the value here; it resets the adapter's
  		 * internal timer, and causes us to delay far longer than
  		 * we should between interrupts.  Instead, we write the ITR
  		 * value at the beginning of the next interrupt so the timing
  		 * ends up being correct.
  		 */
  		q_vector->itr_val = new_itr;
  		q_vector->set_itr = 1;
  	}
  }
  
  void igb_tx_ctxtdesc(struct igb_ring *tx_ring, u32 vlan_macip_lens,
  		     u32 type_tucmd, u32 mss_l4len_idx)
  {
  	struct e1000_adv_tx_context_desc *context_desc;
  	u16 i = tx_ring->next_to_use;
  
  	context_desc = IGB_TX_CTXTDESC(tx_ring, i);
  
  	i++;
  	tx_ring->next_to_use = (i < tx_ring->count) ? i : 0;
  
  	/* set bits to identify this as an advanced context descriptor */
  	type_tucmd |= E1000_TXD_CMD_DEXT | E1000_ADVTXD_DTYP_CTXT;
  
  	/* For 82575, context index must be unique per ring. */
  	if (test_bit(IGB_RING_FLAG_TX_CTX_IDX, &tx_ring->flags))
  		mss_l4len_idx |= tx_ring->reg_idx << 4;
  
  	context_desc->vlan_macip_lens	= cpu_to_le32(vlan_macip_lens);
  	context_desc->seqnum_seed	= 0;
  	context_desc->type_tucmd_mlhl	= cpu_to_le32(type_tucmd);
  	context_desc->mss_l4len_idx	= cpu_to_le32(mss_l4len_idx);
  }
  
  static int igb_tso(struct igb_ring *tx_ring,
  		   struct igb_tx_buffer *first,
  		   u8 *hdr_len)
  {
  #ifdef NETIF_F_TSO
  	struct sk_buff *skb = first->skb;
  	u32 vlan_macip_lens, type_tucmd;
  	u32 mss_l4len_idx, l4len;
  
  	if (skb->ip_summed != CHECKSUM_PARTIAL)
  		return 0;
  
  	if (!skb_is_gso(skb))
  #endif /* NETIF_F_TSO */
  		return 0;
  #ifdef NETIF_F_TSO
  
  	if (skb_header_cloned(skb)) {
  		int err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
  		if (err)
  			return err;
  	}
  
  	/* ADV DTYP TUCMD MKRLOC/ISCSIHEDLEN */
  	type_tucmd = E1000_ADVTXD_TUCMD_L4T_TCP;
  
  	if (first->protocol == __constant_htons(ETH_P_IP)) {
  		struct iphdr *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);
  		type_tucmd |= E1000_ADVTXD_TUCMD_IPV4;
  		first->tx_flags |= IGB_TX_FLAGS_TSO |
  				   IGB_TX_FLAGS_CSUM |
  				   IGB_TX_FLAGS_IPV4;
  #ifdef NETIF_F_TSO6
  	} else if (skb_is_gso_v6(skb)) {
  		ipv6_hdr(skb)->payload_len = 0;
  		tcp_hdr(skb)->check = ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
  						       &ipv6_hdr(skb)->daddr,
  						       0, IPPROTO_TCP, 0);
  		first->tx_flags |= IGB_TX_FLAGS_TSO |
  				   IGB_TX_FLAGS_CSUM;
  #endif
  	}
  
  	/* compute header lengths */
  	l4len = tcp_hdrlen(skb);
  	*hdr_len = skb_transport_offset(skb) + l4len;
  
  	/* update gso size and bytecount with header size */
  	first->gso_segs = skb_shinfo(skb)->gso_segs;
  	first->bytecount += (first->gso_segs - 1) * *hdr_len;
  
  	/* MSS L4LEN IDX */
  	mss_l4len_idx = l4len << E1000_ADVTXD_L4LEN_SHIFT;
  	mss_l4len_idx |= skb_shinfo(skb)->gso_size << E1000_ADVTXD_MSS_SHIFT;
  
  	/* VLAN MACLEN IPLEN */
  	vlan_macip_lens = skb_network_header_len(skb);
  	vlan_macip_lens |= skb_network_offset(skb) << E1000_ADVTXD_MACLEN_SHIFT;
  	vlan_macip_lens |= first->tx_flags & IGB_TX_FLAGS_VLAN_MASK;
  
  	igb_tx_ctxtdesc(tx_ring, vlan_macip_lens, type_tucmd, mss_l4len_idx);
  
  	return 1;
  #endif  /* NETIF_F_TSO */
  }
  
  static void igb_tx_csum(struct igb_ring *tx_ring, struct igb_tx_buffer *first)
  {
  	struct sk_buff *skb = first->skb;
  	u32 vlan_macip_lens = 0;
  	u32 mss_l4len_idx = 0;
  	u32 type_tucmd = 0;
  
  	if (skb->ip_summed != CHECKSUM_PARTIAL) {
  		if (!(first->tx_flags & IGB_TX_FLAGS_VLAN))
  			return;
  	} else {
  		u8 nexthdr = 0;
  		switch (first->protocol) {
  		case __constant_htons(ETH_P_IP):
  			vlan_macip_lens |= skb_network_header_len(skb);
  			type_tucmd |= E1000_ADVTXD_TUCMD_IPV4;
  			nexthdr = ip_hdr(skb)->protocol;
  			break;
  #ifdef NETIF_F_IPV6_CSUM
  		case __constant_htons(ETH_P_IPV6):
  			vlan_macip_lens |= skb_network_header_len(skb);
  			nexthdr = ipv6_hdr(skb)->nexthdr;
  			break;
  #endif
  		default:
  			if (unlikely(net_ratelimit())) {
  				dev_warn(tx_ring->dev,
  				 "partial checksum but proto=%x!\n",
  				 first->protocol);
  			}
  			break;
  		}
  
  		switch (nexthdr) {
  		case IPPROTO_TCP:
  			type_tucmd |= E1000_ADVTXD_TUCMD_L4T_TCP;
  			mss_l4len_idx = tcp_hdrlen(skb) <<
  					E1000_ADVTXD_L4LEN_SHIFT;
  			break;
  #ifdef HAVE_SCTP
  		case IPPROTO_SCTP:
  			type_tucmd |= E1000_ADVTXD_TUCMD_L4T_SCTP;
  			mss_l4len_idx = sizeof(struct sctphdr) <<
  					E1000_ADVTXD_L4LEN_SHIFT;
  			break;
  #endif
  		case IPPROTO_UDP:
  			mss_l4len_idx = sizeof(struct udphdr) <<
  					E1000_ADVTXD_L4LEN_SHIFT;
  			break;
  		default:
  			if (unlikely(net_ratelimit())) {
  				dev_warn(tx_ring->dev,
  				 "partial checksum but l4 proto=%x!\n",
  				 nexthdr);
  			}
  			break;
  		}
  
  		/* update TX checksum flag */
  		first->tx_flags |= IGB_TX_FLAGS_CSUM;
  	}
  
  	vlan_macip_lens |= skb_network_offset(skb) << E1000_ADVTXD_MACLEN_SHIFT;
  	vlan_macip_lens |= first->tx_flags & IGB_TX_FLAGS_VLAN_MASK;
  
  	igb_tx_ctxtdesc(tx_ring, vlan_macip_lens, type_tucmd, mss_l4len_idx);
  }
  
  #define IGB_SET_FLAG(_input, _flag, _result) \
  	((_flag <= _result) ? \
  	 ((u32)(_input & _flag) * (_result / _flag)) : \
  	 ((u32)(_input & _flag) / (_flag / _result)))
  
  static u32 igb_tx_cmd_type(struct sk_buff *skb, u32 tx_flags)
  {
  	/* set type for advanced descriptor with frame checksum insertion */
  	u32 cmd_type = E1000_ADVTXD_DTYP_DATA |
  		       E1000_ADVTXD_DCMD_DEXT |
  		       E1000_ADVTXD_DCMD_IFCS;
  
  	/* set HW vlan bit if vlan is present */
  	cmd_type |= IGB_SET_FLAG(tx_flags, IGB_TX_FLAGS_VLAN,
  				 (E1000_ADVTXD_DCMD_VLE));
  
  	/* set segmentation bits for TSO */
  	cmd_type |= IGB_SET_FLAG(tx_flags, IGB_TX_FLAGS_TSO,
  				 (E1000_ADVTXD_DCMD_TSE));
  
  	/* set timestamp bit if present */
  	cmd_type |= IGB_SET_FLAG(tx_flags, IGB_TX_FLAGS_TSTAMP,
  				 (E1000_ADVTXD_MAC_TSTAMP));
  
  	return cmd_type;
  }
  
  static void igb_tx_olinfo_status(struct igb_ring *tx_ring,
  				 union e1000_adv_tx_desc *tx_desc,
  				 u32 tx_flags, unsigned int paylen)
  {
  	u32 olinfo_status = paylen << E1000_ADVTXD_PAYLEN_SHIFT;
  
  	/* 82575 requires a unique index per ring */
  	if (test_bit(IGB_RING_FLAG_TX_CTX_IDX, &tx_ring->flags))
  		olinfo_status |= tx_ring->reg_idx << 4;
  
  	/* insert L4 checksum */
  	olinfo_status |= IGB_SET_FLAG(tx_flags,
  				      IGB_TX_FLAGS_CSUM,
  				      (E1000_TXD_POPTS_TXSM << 8));
  
  	/* insert IPv4 checksum */
  	olinfo_status |= IGB_SET_FLAG(tx_flags,
  				      IGB_TX_FLAGS_IPV4,
  				      (E1000_TXD_POPTS_IXSM << 8));
  
  	tx_desc->read.olinfo_status = cpu_to_le32(olinfo_status);
  }
  
  static void igb_tx_map(struct igb_ring *tx_ring,
  		       struct igb_tx_buffer *first,
  		       const u8 hdr_len)
  {
  	struct sk_buff *skb = first->skb;
  	struct igb_tx_buffer *tx_buffer;
  	union e1000_adv_tx_desc *tx_desc;
  	struct skb_frag_struct *frag;
  	dma_addr_t dma;
  	unsigned int data_len, size;
  	u32 tx_flags = first->tx_flags;
  	u32 cmd_type = igb_tx_cmd_type(skb, tx_flags);
  	u16 i = tx_ring->next_to_use;
  
  	tx_desc = IGB_TX_DESC(tx_ring, i);
  
  	igb_tx_olinfo_status(tx_ring, tx_desc, tx_flags, skb->len - hdr_len);
  
  	size = skb_headlen(skb);
  	data_len = skb->data_len;
  
  	dma = dma_map_single(tx_ring->dev, skb->data, size, DMA_TO_DEVICE);
  
  	tx_buffer = first;
  
  	for (frag = &skb_shinfo(skb)->frags[0];; frag++) {
  		if (dma_mapping_error(tx_ring->dev, dma))
  			goto dma_error;
  
  		/* record length, and DMA address */
  		dma_unmap_len_set(tx_buffer, len, size);
  		dma_unmap_addr_set(tx_buffer, dma, dma);
  
  		tx_desc->read.buffer_addr = cpu_to_le64(dma);
  
  		while (unlikely(size > IGB_MAX_DATA_PER_TXD)) {
  			tx_desc->read.cmd_type_len =
  				cpu_to_le32(cmd_type ^ IGB_MAX_DATA_PER_TXD);
  
  			i++;
  			tx_desc++;
  			if (i == tx_ring->count) {
  				tx_desc = IGB_TX_DESC(tx_ring, 0);
  				i = 0;
  			}
  			tx_desc->read.olinfo_status = 0;
  
  			dma += IGB_MAX_DATA_PER_TXD;
  			size -= IGB_MAX_DATA_PER_TXD;
  
  			tx_desc->read.buffer_addr = cpu_to_le64(dma);
  		}
  
  		if (likely(!data_len))
  			break;
  
  		tx_desc->read.cmd_type_len = cpu_to_le32(cmd_type ^ size);
  
  		i++;
  		tx_desc++;
  		if (i == tx_ring->count) {
  			tx_desc = IGB_TX_DESC(tx_ring, 0);
  			i = 0;
  		}
  		tx_desc->read.olinfo_status = 0;
  
  		size = skb_frag_size(frag);
  		data_len -= size;
  
  		dma = skb_frag_dma_map(tx_ring->dev, frag, 0,
  				       size, DMA_TO_DEVICE);
  
  		tx_buffer = &tx_ring->tx_buffer_info[i];
  	}
  
  	/* write last descriptor with RS and EOP bits */
  	cmd_type |= size | IGB_TXD_DCMD;
  	tx_desc->read.cmd_type_len = cpu_to_le32(cmd_type);
  
  	netdev_tx_sent_queue(txring_txq(tx_ring), first->bytecount);
  	/* set the timestamp */
  	first->time_stamp = jiffies;
  
  	/*
  	 * 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).
  	 *
  	 * We also need this memory barrier to make certain all of the
  	 * status bits have been updated before next_to_watch is written.
  	 */
  	wmb();
  
  	/* set next_to_watch value indicating a packet is present */
  	first->next_to_watch = tx_desc;
  
  	i++;
  	if (i == tx_ring->count)
  		i = 0;
  
  	tx_ring->next_to_use = i;
  
  	writel(i, tx_ring->tail);
  
  	/* we need this if more than one processor can write to our tail
  	 * at a time, it syncronizes IO on IA64/Altix systems */
  	mmiowb();
  
  	return;
  
  dma_error:
  	dev_err(tx_ring->dev, "TX DMA map failed\n");
  
  	/* clear dma mappings for failed tx_buffer_info map */
  	for (;;) {
  		tx_buffer = &tx_ring->tx_buffer_info[i];
  		igb_unmap_and_free_tx_resource(tx_ring, tx_buffer);
  		if (tx_buffer == first)
  			break;
  		if (i == 0)
  			i = tx_ring->count;
  		i--;
  	}
  
  	tx_ring->next_to_use = i;
  }
  
  static int __igb_maybe_stop_tx(struct igb_ring *tx_ring, const u16 size)
  {
  	struct net_device *netdev = netdev_ring(tx_ring);
  
  	if (netif_is_multiqueue(netdev))
  		netif_stop_subqueue(netdev, ring_queue_index(tx_ring));
  	else
  		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 (igb_desc_unused(tx_ring) < size)
  		return -EBUSY;
  
  	/* A reprieve! */
  	if (netif_is_multiqueue(netdev))
  		netif_wake_subqueue(netdev, ring_queue_index(tx_ring));
  	else
  		netif_wake_queue(netdev);
  
  	tx_ring->tx_stats.restart_queue++;
  
  	return 0;
  }
  
  static inline int igb_maybe_stop_tx(struct igb_ring *tx_ring, const u16 size)
  {
  	if (igb_desc_unused(tx_ring) >= size)
  		return 0;
  	return __igb_maybe_stop_tx(tx_ring, size);
  }
  
  netdev_tx_t igb_xmit_frame_ring(struct sk_buff *skb,
  				struct igb_ring *tx_ring)
  {
  	struct igb_tx_buffer *first;
  	int tso;
  	u32 tx_flags = 0;
  #if PAGE_SIZE > IGB_MAX_DATA_PER_TXD
  	unsigned short f;
  #endif
  	u16 count = TXD_USE_COUNT(skb_headlen(skb));
  	__be16 protocol = vlan_get_protocol(skb);
  	u8 hdr_len = 0;
  
  	/*
  	 * need: 1 descriptor per page * PAGE_SIZE/IGB_MAX_DATA_PER_TXD,
  	 *       + 1 desc for skb_headlen/IGB_MAX_DATA_PER_TXD,
  	 *       + 2 desc gap to keep tail from touching head,
  	 *       + 1 desc for context descriptor,
  	 * otherwise try next time
  	 */
  #if PAGE_SIZE > IGB_MAX_DATA_PER_TXD
  	for (f = 0; f < skb_shinfo(skb)->nr_frags; f++)
  		count += TXD_USE_COUNT(skb_shinfo(skb)->frags[f].size);
  #else
  	count += skb_shinfo(skb)->nr_frags;
  #endif
  	if (igb_maybe_stop_tx(tx_ring, count + 3)) {
  		/* this is a hard error */
  		return NETDEV_TX_BUSY;
  	}
  
  	/* record the location of the first descriptor for this packet */
  	first = &tx_ring->tx_buffer_info[tx_ring->next_to_use];
  	first->skb = skb;
  	first->bytecount = skb->len;
  	first->gso_segs = 1;
  
  	skb_tx_timestamp(skb);
  
  #ifdef HAVE_PTP_1588_CLOCK
  	if (unlikely(skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP)) {
  		struct igb_adapter *adapter = netdev_priv(tx_ring->netdev);
  		if (!adapter->ptp_tx_skb) {
  			skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS;
  			tx_flags |= IGB_TX_FLAGS_TSTAMP;
  
  			adapter->ptp_tx_skb = skb_get(skb);
  			adapter->ptp_tx_start = jiffies;
  			if (adapter->hw.mac.type == e1000_82576)
  				schedule_work(&adapter->ptp_tx_work);
  		}
  	}
  #endif /* HAVE_PTP_1588_CLOCK */
  
  	if (vlan_tx_tag_present(skb)) {
  		tx_flags |= IGB_TX_FLAGS_VLAN;
  		tx_flags |= (vlan_tx_tag_get(skb) << IGB_TX_FLAGS_VLAN_SHIFT);
  	}
  
  	/* record initial flags and protocol */
  	first->tx_flags = tx_flags;
  	first->protocol = protocol;
  
  	tso = igb_tso(tx_ring, first, &hdr_len);
  	if (tso < 0)
  		goto out_drop;
  	else if (!tso)
  		igb_tx_csum(tx_ring, first);
  
  	igb_tx_map(tx_ring, first, hdr_len);
  
  #ifndef HAVE_TRANS_START_IN_QUEUE
  	netdev_ring(tx_ring)->trans_start = jiffies;
  
  #endif
  	/* Make sure there is space in the ring for the next send. */
  	igb_maybe_stop_tx(tx_ring, DESC_NEEDED);
  
  	return NETDEV_TX_OK;
  
  out_drop:
  	igb_unmap_and_free_tx_resource(tx_ring, first);
  
  	return NETDEV_TX_OK;
  }
  
  #ifdef HAVE_TX_MQ
  static inline struct igb_ring *igb_tx_queue_mapping(struct igb_adapter *adapter,
                                                      struct sk_buff *skb)
  {
  	unsigned int r_idx = skb->queue_mapping;
  
  	if (r_idx >= adapter->num_tx_queues)
  		r_idx = r_idx % adapter->num_tx_queues;
  
  	return adapter->tx_ring[r_idx];
  }
  #else
  #define igb_tx_queue_mapping(_adapter, _skb) (_adapter)->tx_ring[0]
  #endif
  
  static netdev_tx_t igb_xmit_frame(struct sk_buff *skb,
                                    struct net_device *netdev)
  {
  	struct igb_adapter *adapter = netdev_priv(netdev);
  
  	if (test_bit(__IGB_DOWN, &adapter->state)) {
  		dev_kfree_skb_any(skb);
  		return NETDEV_TX_OK;
  	}
  
  	if (skb->len <= 0) {
  		dev_kfree_skb_any(skb);
  		return NETDEV_TX_OK;
  	}
  
  	/*
  	 * The minimum packet size with TCTL.PSP set is 17 so pad the skb
  	 * in order to meet this minimum size requirement.
  	 */
  	if (skb->len < 17) {
  		if (skb_padto(skb, 17))
  			return NETDEV_TX_OK;
  		skb->len = 17;
  	}
  
  	return igb_xmit_frame_ring(skb, igb_tx_queue_mapping(adapter, skb));
  }
  
  /**
   * igb_tx_timeout - Respond to a Tx Hang
   * @netdev: network interface device structure
   **/
  static void igb_tx_timeout(struct net_device *netdev)
  {
  	struct igb_adapter *adapter = netdev_priv(netdev);
  	struct e1000_hw *hw = &adapter->hw;
  
  	/* Do the reset outside of interrupt context */
  	adapter->tx_timeout_count++;
  
  	if (hw->mac.type >= e1000_82580)
  		hw->dev_spec._82575.global_device_reset = true;
  
  	schedule_work(&adapter->reset_task);
  	E1000_WRITE_REG(hw, E1000_EICS,
  			(adapter->eims_enable_mask & ~adapter->eims_other));
  }
  
  static void igb_reset_task(struct work_struct *work)
  {
  	struct igb_adapter *adapter;
  	adapter = container_of(work, struct igb_adapter, reset_task);
  
  	igb_reinit_locked(adapter);
  }
  
  /**
   * igb_get_stats - Get System Network Statistics
   * @netdev: network interface device structure
   *
   * Returns the address of the device statistics structure.
   * The statistics are updated here and also from the timer callback.
   **/
  static struct net_device_stats *igb_get_stats(struct net_device *netdev)
  {
  	struct igb_adapter *adapter = netdev_priv(netdev);
  
  	if (!test_bit(__IGB_RESETTING, &adapter->state))
  		igb_update_stats(adapter);
  
  #ifdef HAVE_NETDEV_STATS_IN_NETDEV
  	/* only return the current stats */
  	return &netdev->stats;
  #else
  	/* only return the current stats */
  	return &adapter->net_stats;
  #endif /* HAVE_NETDEV_STATS_IN_NETDEV */
  }
  
  /**
   * igb_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 igb_change_mtu(struct net_device *netdev, int new_mtu)
  {
  	struct igb_adapter *adapter = netdev_priv(netdev);
  	struct e1000_hw *hw = &adapter->hw;
  	struct pci_dev *pdev = adapter->pdev;
  	int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN;
  
  	if ((new_mtu < 68) || (max_frame > MAX_JUMBO_FRAME_SIZE)) {
  		dev_err(pci_dev_to_dev(pdev), "Invalid MTU setting\n");
  		return -EINVAL;
  	}
  
  #define MAX_STD_JUMBO_FRAME_SIZE 9238
  	if (max_frame > MAX_STD_JUMBO_FRAME_SIZE) {
  		dev_err(pci_dev_to_dev(pdev), "MTU > 9216 not supported.\n");
  		return -EINVAL;
  	}
  
  	/* adjust max frame to be at least the size of a standard frame */
  	if (max_frame < (ETH_FRAME_LEN + ETH_FCS_LEN))
  		max_frame = ETH_FRAME_LEN + ETH_FCS_LEN;
  
  	while (test_and_set_bit(__IGB_RESETTING, &adapter->state))
  		usleep_range(1000, 2000);
  
  	/* igb_down has a dependency on max_frame_size */
  	adapter->max_frame_size = max_frame;
  
  	if (netif_running(netdev))
  		igb_down(adapter);
  
  	dev_info(pci_dev_to_dev(pdev), "changing MTU from %d to %d\n",
  	        netdev->mtu, new_mtu);
  	netdev->mtu = new_mtu;
  	hw->dev_spec._82575.mtu = new_mtu;
  
  	if (netif_running(netdev))
  		igb_up(adapter);
  	else
  		igb_reset(adapter);
  
  	clear_bit(__IGB_RESETTING, &adapter->state);
  
  	return 0;
  }
  
  /**
   * igb_update_stats - Update the board statistics counters
   * @adapter: board private structure
   **/
  
  void igb_update_stats(struct igb_adapter *adapter)
  {
  #ifdef HAVE_NETDEV_STATS_IN_NETDEV
  	struct net_device_stats *net_stats = &adapter->netdev->stats;
  #else
  	struct net_device_stats *net_stats = &adapter->net_stats;
  #endif /* HAVE_NETDEV_STATS_IN_NETDEV */
  	struct e1000_hw *hw = &adapter->hw;
  #ifdef HAVE_PCI_ERS
  	struct pci_dev *pdev = adapter->pdev;
  #endif
  	u32 reg, mpc;
  	u16 phy_tmp;
  	int i;
  	u64 bytes, packets;
  #ifndef IGB_NO_LRO
  	u32 flushed = 0, coal = 0;
  	struct igb_q_vector *q_vector;
  #endif
  
  #define PHY_IDLE_ERROR_COUNT_MASK 0x00FF
  
  	/*
  	 * Prevent stats update while adapter is being reset, or if the pci
  	 * connection is down.
  	 */
  	if (adapter->link_speed == 0)
  		return;
  #ifdef HAVE_PCI_ERS
  	if (pci_channel_offline(pdev))
  		return;
  
  #endif
  #ifndef IGB_NO_LRO
  	for (i = 0; i < adapter->num_q_vectors; i++) {
  		q_vector = adapter->q_vector[i];
  		if (!q_vector)
  			continue;
  		flushed += q_vector->lrolist.stats.flushed;
  		coal += q_vector->lrolist.stats.coal;
  	}
  	adapter->lro_stats.flushed = flushed;
  	adapter->lro_stats.coal = coal;
  
  #endif
  	bytes = 0;
  	packets = 0;
  	for (i = 0; i < adapter->num_rx_queues; i++) {
  		u32 rqdpc_tmp = E1000_READ_REG(hw, E1000_RQDPC(i)) & 0x0FFF;
  		struct igb_ring *ring = adapter->rx_ring[i];
  		ring->rx_stats.drops += rqdpc_tmp;
  		net_stats->rx_fifo_errors += rqdpc_tmp;
  #ifdef CONFIG_IGB_VMDQ_NETDEV
  		if (!ring->vmdq_netdev) {
  			bytes += ring->rx_stats.bytes;
  			packets += ring->rx_stats.packets;
  		}
  #else
  		bytes += ring->rx_stats.bytes;
  		packets += ring->rx_stats.packets;
  #endif
  	}
  
  	net_stats->rx_bytes = bytes;
  	net_stats->rx_packets = packets;
  
  	bytes = 0;
  	packets = 0;
  	for (i = 0; i < adapter->num_tx_queues; i++) {
  		struct igb_ring *ring = adapter->tx_ring[i];
  #ifdef CONFIG_IGB_VMDQ_NETDEV
  		if (!ring->vmdq_netdev) {
  			bytes += ring->tx_stats.bytes;
  			packets += ring->tx_stats.packets;
  		}
  #else
  		bytes += ring->tx_stats.bytes;
  		packets += ring->tx_stats.packets;
  #endif
  	}
  	net_stats->tx_bytes = bytes;
  	net_stats->tx_packets = packets;
  
  	/* read stats registers */
  	adapter->stats.crcerrs += E1000_READ_REG(hw, E1000_CRCERRS);
  	adapter->stats.gprc += E1000_READ_REG(hw, E1000_GPRC);
  	adapter->stats.gorc += E1000_READ_REG(hw, E1000_GORCL);
  	E1000_READ_REG(hw, E1000_GORCH); /* clear GORCL */
  	adapter->stats.bprc += E1000_READ_REG(hw, E1000_BPRC);
  	adapter->stats.mprc += E1000_READ_REG(hw, E1000_MPRC);
  	adapter->stats.roc += E1000_READ_REG(hw, E1000_ROC);
  
  	adapter->stats.prc64 += E1000_READ_REG(hw, E1000_PRC64);
  	adapter->stats.prc127 += E1000_READ_REG(hw, E1000_PRC127);
  	adapter->stats.prc255 += E1000_READ_REG(hw, E1000_PRC255);
  	adapter->stats.prc511 += E1000_READ_REG(hw, E1000_PRC511);
  	adapter->stats.prc1023 += E1000_READ_REG(hw, E1000_PRC1023);
  	adapter->stats.prc1522 += E1000_READ_REG(hw, E1000_PRC1522);
  	adapter->stats.symerrs += E1000_READ_REG(hw, E1000_SYMERRS);
  	adapter->stats.sec += E1000_READ_REG(hw, E1000_SEC);
  
  	mpc = E1000_READ_REG(hw, E1000_MPC);
  	adapter->stats.mpc += mpc;
  	net_stats->rx_fifo_errors += mpc;
  	adapter->stats.scc += E1000_READ_REG(hw, E1000_SCC);
  	adapter->stats.ecol += E1000_READ_REG(hw, E1000_ECOL);
  	adapter->stats.mcc += E1000_READ_REG(hw, E1000_MCC);
  	adapter->stats.latecol += E1000_READ_REG(hw, E1000_LATECOL);
  	adapter->stats.dc += E1000_READ_REG(hw, E1000_DC);
  	adapter->stats.rlec += E1000_READ_REG(hw, E1000_RLEC);
  	adapter->stats.xonrxc += E1000_READ_REG(hw, E1000_XONRXC);
  	adapter->stats.xontxc += E1000_READ_REG(hw, E1000_XONTXC);
  	adapter->stats.xoffrxc += E1000_READ_REG(hw, E1000_XOFFRXC);
  	adapter->stats.xofftxc += E1000_READ_REG(hw, E1000_XOFFTXC);
  	adapter->stats.fcruc += E1000_READ_REG(hw, E1000_FCRUC);
  	adapter->stats.gptc += E1000_READ_REG(hw, E1000_GPTC);
  	adapter->stats.gotc += E1000_READ_REG(hw, E1000_GOTCL);
  	E1000_READ_REG(hw, E1000_GOTCH); /* clear GOTCL */
  	adapter->stats.rnbc += E1000_READ_REG(hw, E1000_RNBC);
  	adapter->stats.ruc += E1000_READ_REG(hw, E1000_RUC);
  	adapter->stats.rfc += E1000_READ_REG(hw, E1000_RFC);
  	adapter->stats.rjc += E1000_READ_REG(hw, E1000_RJC);
  	adapter->stats.tor += E1000_READ_REG(hw, E1000_TORH);
  	adapter->stats.tot += E1000_READ_REG(hw, E1000_TOTH);
  	adapter->stats.tpr += E1000_READ_REG(hw, E1000_TPR);
  
  	adapter->stats.ptc64 += E1000_READ_REG(hw, E1000_PTC64);
  	adapter->stats.ptc127 += E1000_READ_REG(hw, E1000_PTC127);
  	adapter->stats.ptc255 += E1000_READ_REG(hw, E1000_PTC255);
  	adapter->stats.ptc511 += E1000_READ_REG(hw, E1000_PTC511);
  	adapter->stats.ptc1023 += E1000_READ_REG(hw, E1000_PTC1023);
  	adapter->stats.ptc1522 += E1000_READ_REG(hw, E1000_PTC1522);
  
  	adapter->stats.mptc += E1000_READ_REG(hw, E1000_MPTC);
  	adapter->stats.bptc += E1000_READ_REG(hw, E1000_BPTC);
  
  	adapter->stats.tpt += E1000_READ_REG(hw, E1000_TPT);
  	adapter->stats.colc += E1000_READ_REG(hw, E1000_COLC);
  
  	adapter->stats.algnerrc += E1000_READ_REG(hw, E1000_ALGNERRC);
  	/* read internal phy sepecific stats */
  	reg = E1000_READ_REG(hw, E1000_CTRL_EXT);
  	if (!(reg & E1000_CTRL_EXT_LINK_MODE_MASK)) {
  		adapter->stats.rxerrc += E1000_READ_REG(hw, E1000_RXERRC);
  
  		/* this stat has invalid values on i210/i211 */
  		if ((hw->mac.type != e1000_i210) &&
  		    (hw->mac.type != e1000_i211))
  			adapter->stats.tncrs += E1000_READ_REG(hw, E1000_TNCRS);
  	}
  	adapter->stats.tsctc += E1000_READ_REG(hw, E1000_TSCTC);
  	adapter->stats.tsctfc += E1000_READ_REG(hw, E1000_TSCTFC);
  
  	adapter->stats.iac += E1000_READ_REG(hw, E1000_IAC);
  	adapter->stats.icrxoc += E1000_READ_REG(hw, E1000_ICRXOC);
  	adapter->stats.icrxptc += E1000_READ_REG(hw, E1000_ICRXPTC);
  	adapter->stats.icrxatc += E1000_READ_REG(hw, E1000_ICRXATC);
  	adapter->stats.ictxptc += E1000_READ_REG(hw, E1000_ICTXPTC);
  	adapter->stats.ictxatc += E1000_READ_REG(hw, E1000_ICTXATC);
  	adapter->stats.ictxqec += E1000_READ_REG(hw, E1000_ICTXQEC);
  	adapter->stats.ictxqmtc += E1000_READ_REG(hw, E1000_ICTXQMTC);
  	adapter->stats.icrxdmtc += E1000_READ_REG(hw, E1000_ICRXDMTC);
  
  	/* Fill out the OS statistics structure */
  	net_stats->multicast = adapter->stats.mprc;
  	net_stats->collisions = adapter->stats.colc;
  
  	/* Rx Errors */
  
  	/* RLEC on some newer hardware can be incorrect so build
  	 * our own version based on RUC and ROC */
  	net_stats->rx_errors = adapter->stats.rxerrc +
  		adapter->stats.crcerrs + adapter->stats.algnerrc +
  		adapter->stats.ruc + adapter->stats.roc +
  		adapter->stats.cexterr;
  	net_stats->rx_length_errors = adapter->stats.ruc +
  				      adapter->stats.roc;
  	net_stats->rx_crc_errors = adapter->stats.crcerrs;
  	net_stats->rx_frame_errors = adapter->stats.algnerrc;
  	net_stats->rx_missed_errors = adapter->stats.mpc;
  
  	/* Tx Errors */
  	net_stats->tx_errors = adapter->stats.ecol +
  			       adapter->stats.latecol;
  	net_stats->tx_aborted_errors = adapter->stats.ecol;
  	net_stats->tx_window_errors = adapter->stats.latecol;
  	net_stats->tx_carrier_errors = adapter->stats.tncrs;
  
  	/* Tx Dropped needs to be maintained elsewhere */
  
  	/* Phy Stats */
  	if (hw->phy.media_type == e1000_media_type_copper) {
  		if ((adapter->link_speed == SPEED_1000) &&
  		   (!e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_tmp))) {
  			phy_tmp &= PHY_IDLE_ERROR_COUNT_MASK;
  			adapter->phy_stats.idle_errors += phy_tmp;
  		}
  	}
  
  	/* Management Stats */
  	adapter->stats.mgptc += E1000_READ_REG(hw, E1000_MGTPTC);
  	adapter->stats.mgprc += E1000_READ_REG(hw, E1000_MGTPRC);
  	if (hw->mac.type > e1000_82580) {
  		adapter->stats.o2bgptc += E1000_READ_REG(hw, E1000_O2BGPTC);
  		adapter->stats.o2bspc += E1000_READ_REG(hw, E1000_O2BSPC);
  		adapter->stats.b2ospc += E1000_READ_REG(hw, E1000_B2OSPC);
  		adapter->stats.b2ogprc += E1000_READ_REG(hw, E1000_B2OGPRC);
  	}
  }
  
  static irqreturn_t igb_msix_other(int irq, void *data)
  {
  	struct igb_adapter *adapter = data;
  	struct e1000_hw *hw = &adapter->hw;
  	u32 icr = E1000_READ_REG(hw, E1000_ICR);
  	/* reading ICR causes bit 31 of EICR to be cleared */
  
  	if (icr & E1000_ICR_DRSTA)
  		schedule_work(&adapter->reset_task);
  
  	if (icr & E1000_ICR_DOUTSYNC) {
  		/* HW is reporting DMA is out of sync */
  		adapter->stats.doosync++;
  		/* The DMA Out of Sync is also indication of a spoof event
  		 * in IOV mode. Check the Wrong VM Behavior register to
  		 * see if it is really a spoof event. */
  		igb_check_wvbr(adapter);
  	}
  
  	/* Check for a mailbox event */
  	if (icr & E1000_ICR_VMMB)
  		igb_msg_task(adapter);
  
  	if (icr & E1000_ICR_LSC) {
  		hw->mac.get_link_status = 1;
  		/* guard against interrupt when we're going down */
  		if (!test_bit(__IGB_DOWN, &adapter->state))
  			mod_timer(&adapter->watchdog_timer, jiffies + 1);
  	}
  
  #ifdef HAVE_PTP_1588_CLOCK
  	if (icr & E1000_ICR_TS) {
  		u32 tsicr = E1000_READ_REG(hw, E1000_TSICR);
  
  		if (tsicr & E1000_TSICR_TXTS) {
  			/* acknowledge the interrupt */
  			E1000_WRITE_REG(hw, E1000_TSICR, E1000_TSICR_TXTS);
  			/* retrieve hardware timestamp */
  			schedule_work(&adapter->ptp_tx_work);
  		}
  	}
  #endif /* HAVE_PTP_1588_CLOCK */
  
  	/* Check for MDD event */
  	if (icr & E1000_ICR_MDDET)
  		igb_process_mdd_event(adapter);
  
  	E1000_WRITE_REG(hw, E1000_EIMS, adapter->eims_other);
  
  	return IRQ_HANDLED;
  }
  
  static void igb_write_itr(struct igb_q_vector *q_vector)
  {
  	struct igb_adapter *adapter = q_vector->adapter;
  	u32 itr_val = q_vector->itr_val & 0x7FFC;
  
  	if (!q_vector->set_itr)
  		return;
  
  	if (!itr_val)
  		itr_val = 0x4;
  
  	if (adapter->hw.mac.type == e1000_82575)
  		itr_val |= itr_val << 16;
  	else
  		itr_val |= E1000_EITR_CNT_IGNR;
  
  	writel(itr_val, q_vector->itr_register);
  	q_vector->set_itr = 0;
  }
  
  static irqreturn_t igb_msix_ring(int irq, void *data)
  {
  	struct igb_q_vector *q_vector = data;
  
  	/* Write the ITR value calculated from the previous interrupt. */
  	igb_write_itr(q_vector);
  
  	napi_schedule(&q_vector->napi);
  
  	return IRQ_HANDLED;
  }
  
  #ifdef IGB_DCA
  static void igb_update_tx_dca(struct igb_adapter *adapter,
  			      struct igb_ring *tx_ring,
  			      int cpu)
  {
  	struct e1000_hw *hw = &adapter->hw;
  	u32 txctrl = dca3_get_tag(tx_ring->dev, cpu);
  
  	if (hw->mac.type != e1000_82575)
  		txctrl <<= E1000_DCA_TXCTRL_CPUID_SHIFT_82576;
  
  	/*
  	 * We can enable relaxed ordering for reads, but not writes when
  	 * DCA is enabled.  This is due to a known issue in some chipsets
  	 * which will cause the DCA tag to be cleared.
  	 */
  	txctrl |= E1000_DCA_TXCTRL_DESC_RRO_EN |
  		  E1000_DCA_TXCTRL_DATA_RRO_EN |
  		  E1000_DCA_TXCTRL_DESC_DCA_EN;
  
  	E1000_WRITE_REG(hw, E1000_DCA_TXCTRL(tx_ring->reg_idx), txctrl);
  }
  
  static void igb_update_rx_dca(struct igb_adapter *adapter,
  			      struct igb_ring *rx_ring,
  			      int cpu)
  {
  	struct e1000_hw *hw = &adapter->hw;
  	u32 rxctrl = dca3_get_tag(&adapter->pdev->dev, cpu);
  
  	if (hw->mac.type != e1000_82575)
  		rxctrl <<= E1000_DCA_RXCTRL_CPUID_SHIFT_82576;
  
  	/*
  	 * We can enable relaxed ordering for reads, but not writes when
  	 * DCA is enabled.  This is due to a known issue in some chipsets
  	 * which will cause the DCA tag to be cleared.
  	 */
  	rxctrl |= E1000_DCA_RXCTRL_DESC_RRO_EN |
  		  E1000_DCA_RXCTRL_DESC_DCA_EN;
  
  	E1000_WRITE_REG(hw, E1000_DCA_RXCTRL(rx_ring->reg_idx), rxctrl);
  }
  
  static void igb_update_dca(struct igb_q_vector *q_vector)
  {
  	struct igb_adapter *adapter = q_vector->adapter;
  	int cpu = get_cpu();
  
  	if (q_vector->cpu == cpu)
  		goto out_no_update;
  
  	if (q_vector->tx.ring)
  		igb_update_tx_dca(adapter, q_vector->tx.ring, cpu);
  
  	if (q_vector->rx.ring)
  		igb_update_rx_dca(adapter, q_vector->rx.ring, cpu);
  
  	q_vector->cpu = cpu;
  out_no_update:
  	put_cpu();
  }
  
  static void igb_setup_dca(struct igb_adapter *adapter)
  {
  	struct e1000_hw *hw = &adapter->hw;
  	int i;
  
  	if (!(adapter->flags & IGB_FLAG_DCA_ENABLED))
  		return;
  
  	/* Always use CB2 mode, difference is masked in the CB driver. */
  	E1000_WRITE_REG(hw, E1000_DCA_CTRL, E1000_DCA_CTRL_DCA_MODE_CB2);
  
  	for (i = 0; i < adapter->num_q_vectors; i++) {
  		adapter->q_vector[i]->cpu = -1;
  		igb_update_dca(adapter->q_vector[i]);
  	}
  }
  
  static int __igb_notify_dca(struct device *dev, void *data)
  {
  	struct net_device *netdev = dev_get_drvdata(dev);
  	struct igb_adapter *adapter = netdev_priv(netdev);
  	struct pci_dev *pdev = adapter->pdev;
  	struct e1000_hw *hw = &adapter->hw;
  	unsigned long event = *(unsigned long *)data;
  
  	switch (event) {
  	case DCA_PROVIDER_ADD:
  		/* if already enabled, don't do it again */
  		if (adapter->flags & IGB_FLAG_DCA_ENABLED)
  			break;
  		if (dca_add_requester(dev) == E1000_SUCCESS) {
  			adapter->flags |= IGB_FLAG_DCA_ENABLED;
  			dev_info(pci_dev_to_dev(pdev), "DCA enabled\n");
  			igb_setup_dca(adapter);
  			break;
  		}
  		/* Fall Through since DCA is disabled. */
  	case DCA_PROVIDER_REMOVE:
  		if (adapter->flags & IGB_FLAG_DCA_ENABLED) {
  			/* without this a class_device is left
  			 * hanging around in the sysfs model */
  			dca_remove_requester(dev);
  			dev_info(pci_dev_to_dev(pdev), "DCA disabled\n");
  			adapter->flags &= ~IGB_FLAG_DCA_ENABLED;
  			E1000_WRITE_REG(hw, E1000_DCA_CTRL, E1000_DCA_CTRL_DCA_DISABLE);
  		}
  		break;
  	}
  
  	return E1000_SUCCESS;
  }
  
  static int igb_notify_dca(struct notifier_block *nb, unsigned long event,
                            void *p)
  {
  	int ret_val;
  
  	ret_val = driver_for_each_device(&igb_driver.driver, NULL, &event,
  	                                 __igb_notify_dca);
  
  	return ret_val ? NOTIFY_BAD : NOTIFY_DONE;
  }
  #endif /* IGB_DCA */
  
  static int igb_vf_configure(struct igb_adapter *adapter, int vf)
  {
  	unsigned char mac_addr[ETH_ALEN];
  
  	random_ether_addr(mac_addr);
  	igb_set_vf_mac(adapter, vf, mac_addr);
  
  #ifdef IFLA_VF_MAX
  #ifdef HAVE_VF_SPOOFCHK_CONFIGURE
  	/* By default spoof check is enabled for all VFs */
  	adapter->vf_data[vf].spoofchk_enabled = true;
  #endif
  #endif
  
  	return true;
  }
  
  static void igb_ping_all_vfs(struct igb_adapter *adapter)
  {
  	struct e1000_hw *hw = &adapter->hw;
  	u32 ping;
  	int i;
  
  	for (i = 0 ; i < adapter->vfs_allocated_count; i++) {
  		ping = E1000_PF_CONTROL_MSG;
  		if (adapter->vf_data[i].flags & IGB_VF_FLAG_CTS)
  			ping |= E1000_VT_MSGTYPE_CTS;
  		e1000_write_mbx(hw, &ping, 1, i);
  	}
  }
  
  /**
   *  igb_mta_set_ - Set multicast filter table address
   *  @adapter: pointer to the adapter structure
   *  @hash_value: determines the MTA register and bit to set
   *
   *  The multicast table address is a register array of 32-bit registers.
   *  The hash_value is used to determine what register the bit is in, the
   *  current value is read, the new bit is OR'd in and the new value is
   *  written back into the register.
   **/
  void igb_mta_set(struct igb_adapter *adapter, u32 hash_value)
  {
  	struct e1000_hw *hw = &adapter->hw;
  	u32 hash_bit, hash_reg, mta;
  
  	/*
  	 * The MTA is a register array of 32-bit registers. It is
  	 * treated like an array of (32*mta_reg_count) bits.  We want to
  	 * set bit BitArray[hash_value]. So we figure out what register
  	 * the bit is in, read it, OR in the new bit, then write
  	 * back the new value.  The (hw->mac.mta_reg_count - 1) serves as a
  	 * mask to bits 31:5 of the hash value which gives us the
  	 * register we're modifying.  The hash bit within that register
  	 * is determined by the lower 5 bits of the hash value.
  	 */
  	hash_reg = (hash_value >> 5) & (hw->mac.mta_reg_count - 1);
  	hash_bit = hash_value & 0x1F;
  
  	mta = E1000_READ_REG_ARRAY(hw, E1000_MTA, hash_reg);
  
  	mta |= (1 << hash_bit);
  
  	E1000_WRITE_REG_ARRAY(hw, E1000_MTA, hash_reg, mta);
  	E1000_WRITE_FLUSH(hw);
  }
  
  static int igb_set_vf_promisc(struct igb_adapter *adapter, u32 *msgbuf, u32 vf)
  {
  
  	struct e1000_hw *hw = &adapter->hw;
  	u32 vmolr = E1000_READ_REG(hw, E1000_VMOLR(vf));
  	struct vf_data_storage *vf_data = &adapter->vf_data[vf];
  
  	vf_data->flags &= ~(IGB_VF_FLAG_UNI_PROMISC |
  	                    IGB_VF_FLAG_MULTI_PROMISC);
  	vmolr &= ~(E1000_VMOLR_ROPE | E1000_VMOLR_ROMPE | E1000_VMOLR_MPME);
  
  #ifdef IGB_ENABLE_VF_PROMISC
  	if (*msgbuf & E1000_VF_SET_PROMISC_UNICAST) {
  		vmolr |= E1000_VMOLR_ROPE;
  		vf_data->flags |= IGB_VF_FLAG_UNI_PROMISC;
  		*msgbuf &= ~E1000_VF_SET_PROMISC_UNICAST;
  	}
  #endif
  	if (*msgbuf & E1000_VF_SET_PROMISC_MULTICAST) {
  		vmolr |= E1000_VMOLR_MPME;
  		vf_data->flags |= IGB_VF_FLAG_MULTI_PROMISC;
  		*msgbuf &= ~E1000_VF_SET_PROMISC_MULTICAST;
  	} else {
  		/*
  		 * if we have hashes and we are clearing a multicast promisc
  		 * flag we need to write the hashes to the MTA as this step
  		 * was previously skipped
  		 */
  		if (vf_data->num_vf_mc_hashes > 30) {
  			vmolr |= E1000_VMOLR_MPME;
  		} else if (vf_data->num_vf_mc_hashes) {
  			int j;
  			vmolr |= E1000_VMOLR_ROMPE;
  			for (j = 0; j < vf_data->num_vf_mc_hashes; j++)
  				igb_mta_set(adapter, vf_data->vf_mc_hashes[j]);
  		}
  	}
  
  	E1000_WRITE_REG(hw, E1000_VMOLR(vf), vmolr);
  
  	/* there are flags left unprocessed, likely not supported */
  	if (*msgbuf & E1000_VT_MSGINFO_MASK)
  		return -EINVAL;
  
  	return 0;
  
  }
  
  static int igb_set_vf_multicasts(struct igb_adapter *adapter,
  				  u32 *msgbuf, u32 vf)
  {
  	int n = (msgbuf[0] & E1000_VT_MSGINFO_MASK) >> E1000_VT_MSGINFO_SHIFT;
  	u16 *hash_list = (u16 *)&msgbuf[1];
  	struct vf_data_storage *vf_data = &adapter->vf_data[vf];
  	int i;
  
  	/* salt away the number of multicast addresses assigned
  	 * to this VF for later use to restore when the PF multi cast
  	 * list changes
  	 */
  	vf_data->num_vf_mc_hashes = n;
  
  	/* only up to 30 hash values supported */
  	if (n > 30)
  		n = 30;
  
  	/* store the hashes for later use */
  	for (i = 0; i < n; i++)
  		vf_data->vf_mc_hashes[i] = hash_list[i];
  
  	/* Flush and reset the mta with the new values */
  	igb_set_rx_mode(adapter->netdev);
  
  	return 0;
  }
  
  static void igb_restore_vf_multicasts(struct igb_adapter *adapter)
  {
  	struct e1000_hw *hw = &adapter->hw;
  	struct vf_data_storage *vf_data;
  	int i, j;
  
  	for (i = 0; i < adapter->vfs_allocated_count; i++) {
  		u32 vmolr = E1000_READ_REG(hw, E1000_VMOLR(i));
  		vmolr &= ~(E1000_VMOLR_ROMPE | E1000_VMOLR_MPME);
  
  		vf_data = &adapter->vf_data[i];
  
  		if ((vf_data->num_vf_mc_hashes > 30) ||
  		    (vf_data->flags & IGB_VF_FLAG_MULTI_PROMISC)) {
  			vmolr |= E1000_VMOLR_MPME;
  		} else if (vf_data->num_vf_mc_hashes) {
  			vmolr |= E1000_VMOLR_ROMPE;
  			for (j = 0; j < vf_data->num_vf_mc_hashes; j++)
  				igb_mta_set(adapter, vf_data->vf_mc_hashes[j]);
  		}
  		E1000_WRITE_REG(hw, E1000_VMOLR(i), vmolr);
  	}
  }
  
  static void igb_clear_vf_vfta(struct igb_adapter *adapter, u32 vf)
  {
  	struct e1000_hw *hw = &adapter->hw;
  	u32 pool_mask, reg, vid;
  	u16 vlan_default;
  	int i;
  
  	pool_mask = 1 << (E1000_VLVF_POOLSEL_SHIFT + vf);
  
  	/* Find the vlan filter for this id */
  	for (i = 0; i < E1000_VLVF_ARRAY_SIZE; i++) {
  		reg = E1000_READ_REG(hw, E1000_VLVF(i));
  
  		/* remove the vf from the pool */
  		reg &= ~pool_mask;
  
  		/* if pool is empty then remove entry from vfta */
  		if (!(reg & E1000_VLVF_POOLSEL_MASK) &&
  		    (reg & E1000_VLVF_VLANID_ENABLE)) {
  			reg = 0;
  			vid = reg & E1000_VLVF_VLANID_MASK;
  			igb_vfta_set(adapter, vid, FALSE);
  		}
  
  		E1000_WRITE_REG(hw, E1000_VLVF(i), reg);
  	}
  
  	adapter->vf_data[vf].vlans_enabled = 0;
  
  	vlan_default = adapter->vf_data[vf].default_vf_vlan_id;
  	if (vlan_default)
  		igb_vlvf_set(adapter, vlan_default, true, vf);
  }
  
  s32 igb_vlvf_set(struct igb_adapter *adapter, u32 vid, bool add, u32 vf)
  {
  	struct e1000_hw *hw = &adapter->hw;
  	u32 reg, i;
  
  	/* The vlvf table only exists on 82576 hardware and newer */
  	if (hw->mac.type < e1000_82576)
  		return -1;
  
  	/* we only need to do this if VMDq is enabled */
  	if (!adapter->vmdq_pools)
  		return -1;
  
  	/* Find the vlan filter for this id */
  	for (i = 0; i < E1000_VLVF_ARRAY_SIZE; i++) {
  		reg = E1000_READ_REG(hw, E1000_VLVF(i));
  		if ((reg & E1000_VLVF_VLANID_ENABLE) &&
  		    vid == (reg & E1000_VLVF_VLANID_MASK))
  			break;
  	}
  
  	if (add) {
  		if (i == E1000_VLVF_ARRAY_SIZE) {
  			/* Did not find a matching VLAN ID entry that was
  			 * enabled.  Search for a free filter entry, i.e.
  			 * one without the enable bit set
  			 */
  			for (i = 0; i < E1000_VLVF_ARRAY_SIZE; i++) {
  				reg = E1000_READ_REG(hw, E1000_VLVF(i));
  				if (!(reg & E1000_VLVF_VLANID_ENABLE))
  					break;
  			}
  		}
  		if (i < E1000_VLVF_ARRAY_SIZE) {
  			/* Found an enabled/available entry */
  			reg |= 1 << (E1000_VLVF_POOLSEL_SHIFT + vf);
  
  			/* if !enabled we need to set this up in vfta */
  			if (!(reg & E1000_VLVF_VLANID_ENABLE)) {
  				/* add VID to filter table */
  				igb_vfta_set(adapter, vid, TRUE);
  				reg |= E1000_VLVF_VLANID_ENABLE;
  			}
  			reg &= ~E1000_VLVF_VLANID_MASK;
  			reg |= vid;
  			E1000_WRITE_REG(hw, E1000_VLVF(i), reg);
  
  			/* do not modify RLPML for PF devices */
  			if (vf >= adapter->vfs_allocated_count)
  				return E1000_SUCCESS;
  
  			if (!adapter->vf_data[vf].vlans_enabled) {
  				u32 size;
  				reg = E1000_READ_REG(hw, E1000_VMOLR(vf));
  				size = reg & E1000_VMOLR_RLPML_MASK;
  				size += 4;
  				reg &= ~E1000_VMOLR_RLPML_MASK;
  				reg |= size;
  				E1000_WRITE_REG(hw, E1000_VMOLR(vf), reg);
  			}
  
  			adapter->vf_data[vf].vlans_enabled++;
  		}
  	} else {
  		if (i < E1000_VLVF_ARRAY_SIZE) {
  			/* remove vf from the pool */
  			reg &= ~(1 << (E1000_VLVF_POOLSEL_SHIFT + vf));
  			/* if pool is empty then remove entry from vfta */
  			if (!(reg & E1000_VLVF_POOLSEL_MASK)) {
  				reg = 0;
  				igb_vfta_set(adapter, vid, FALSE);
  			}
  			E1000_WRITE_REG(hw, E1000_VLVF(i), reg);
  
  			/* do not modify RLPML for PF devices */
  			if (vf >= adapter->vfs_allocated_count)
  				return E1000_SUCCESS;
  
  			adapter->vf_data[vf].vlans_enabled--;
  			if (!adapter->vf_data[vf].vlans_enabled) {
  				u32 size;
  				reg = E1000_READ_REG(hw, E1000_VMOLR(vf));
  				size = reg & E1000_VMOLR_RLPML_MASK;
  				size -= 4;
  				reg &= ~E1000_VMOLR_RLPML_MASK;
  				reg |= size;
  				E1000_WRITE_REG(hw, E1000_VMOLR(vf), reg);
  			}
  		}
  	}
  	return E1000_SUCCESS;
  }
  
  #ifdef IFLA_VF_MAX
  static void igb_set_vmvir(struct igb_adapter *adapter, u32 vid, u32 vf)
  {
  	struct e1000_hw *hw = &adapter->hw;
  
  	if (vid)
  		E1000_WRITE_REG(hw, E1000_VMVIR(vf), (vid | E1000_VMVIR_VLANA_DEFAULT));
  	else
  		E1000_WRITE_REG(hw, E1000_VMVIR(vf), 0);
  }
  
  static int igb_ndo_set_vf_vlan(struct net_device *netdev,
  #ifdef HAVE_VF_VLAN_PROTO
  			       int vf, u16 vlan, u8 qos, __be16 vlan_proto)
  #else
  			       int vf, u16 vlan, u8 qos)
  #endif
  {
  	int err = 0;
  	struct igb_adapter *adapter = netdev_priv(netdev);
  
  	/* VLAN IDs accepted range 0-4094 */
  	if ((vf >= adapter->vfs_allocated_count) || (vlan > VLAN_VID_MASK-1) || (qos > 7))
  		return -EINVAL;
  
  #ifdef HAVE_VF_VLAN_PROTO
  	if (vlan_proto != htons(ETH_P_8021Q))
  		return -EPROTONOSUPPORT;
  #endif
  
  	if (vlan || qos) {
  		err = igb_vlvf_set(adapter, vlan, !!vlan, vf);
  		if (err)
  			goto out;
  		igb_set_vmvir(adapter, vlan | (qos << VLAN_PRIO_SHIFT), vf);
  		igb_set_vmolr(adapter, vf, !vlan);
  		adapter->vf_data[vf].pf_vlan = vlan;
  		adapter->vf_data[vf].pf_qos = qos;
  		igb_set_vf_vlan_strip(adapter, vf, true);
  		dev_info(&adapter->pdev->dev,
  			 "Setting VLAN %d, QOS 0x%x on VF %d\n", vlan, qos, vf);
  		if (test_bit(__IGB_DOWN, &adapter->state)) {
  			dev_warn(&adapter->pdev->dev,
  				 "The VF VLAN has been set,"
  				 " but the PF device is not up.\n");
  			dev_warn(&adapter->pdev->dev,
  				 "Bring the PF device up before"
  				 " attempting to use the VF device.\n");
  		}
  	} else {
  		if (adapter->vf_data[vf].pf_vlan)
  			dev_info(&adapter->pdev->dev,
  				 "Clearing VLAN on VF %d\n", vf);
  		igb_vlvf_set(adapter, adapter->vf_data[vf].pf_vlan,
  				   false, vf);
  		igb_set_vmvir(adapter, vlan, vf);
  		igb_set_vmolr(adapter, vf, true);
  		igb_set_vf_vlan_strip(adapter, vf, false);
  		adapter->vf_data[vf].pf_vlan = 0;
  		adapter->vf_data[vf].pf_qos = 0;
         }
  out:
         return err;
  }
  
  #ifdef HAVE_VF_SPOOFCHK_CONFIGURE
  static int igb_ndo_set_vf_spoofchk(struct net_device *netdev, int vf,
  				bool setting)
  {
  	struct igb_adapter *adapter = netdev_priv(netdev);
  	struct e1000_hw *hw = &adapter->hw;
  	u32 dtxswc, reg_offset;
  
  	if (!adapter->vfs_allocated_count)
  		return -EOPNOTSUPP;
  
  	if (vf >= adapter->vfs_allocated_count)
  		return -EINVAL;
  
  	reg_offset = (hw->mac.type == e1000_82576) ? E1000_DTXSWC : E1000_TXSWC;
  	dtxswc = E1000_READ_REG(hw, reg_offset);
  	if (setting)
  		dtxswc |= ((1 << vf) |
  			   (1 << (vf + E1000_DTXSWC_VLAN_SPOOF_SHIFT)));
  	else
  		dtxswc &= ~((1 << vf) |
  			    (1 << (vf + E1000_DTXSWC_VLAN_SPOOF_SHIFT)));
  	E1000_WRITE_REG(hw, reg_offset, dtxswc);
  
  	adapter->vf_data[vf].spoofchk_enabled = setting;
  	return E1000_SUCCESS;
  }
  #endif /* HAVE_VF_SPOOFCHK_CONFIGURE */
  #endif /* IFLA_VF_MAX */
  
  static int igb_find_vlvf_entry(struct igb_adapter *adapter, int vid)
  {
  	struct e1000_hw *hw = &adapter->hw;
  	int i;
  	u32 reg;
  
  	/* Find the vlan filter for this id */
  	for (i = 0; i < E1000_VLVF_ARRAY_SIZE; i++) {
  		reg = E1000_READ_REG(hw, E1000_VLVF(i));
  		if ((reg & E1000_VLVF_VLANID_ENABLE) &&
  		    vid == (reg & E1000_VLVF_VLANID_MASK))
  			break;
  	}
  
  	if (i >= E1000_VLVF_ARRAY_SIZE)
  		i = -1;
  
  	return i;
  }
  
  static int igb_set_vf_vlan(struct igb_adapter *adapter, u32 *msgbuf, u32 vf)
  {
  	struct e1000_hw *hw = &adapter->hw;
  	int add = (msgbuf[0] & E1000_VT_MSGINFO_MASK) >> E1000_VT_MSGINFO_SHIFT;
  	int vid = (msgbuf[1] & E1000_VLVF_VLANID_MASK);
  	int err = 0;
  
  	if (vid)
  		igb_set_vf_vlan_strip(adapter, vf, true);
  	else
  		igb_set_vf_vlan_strip(adapter, vf, false);
  
  	/* If in promiscuous mode we need to make sure the PF also has
  	 * the VLAN filter set.
  	 */
  	if (add && (adapter->netdev->flags & IFF_PROMISC))
  		err = igb_vlvf_set(adapter, vid, add,
  				   adapter->vfs_allocated_count);
  	if (err)
  		goto out;
  
  	err = igb_vlvf_set(adapter, vid, add, vf);
  
  	if (err)
  		goto out;
  
  	/* Go through all the checks to see if the VLAN filter should
  	 * be wiped completely.
  	 */
  	if (!add && (adapter->netdev->flags & IFF_PROMISC)) {
  		u32 vlvf, bits;
  
  		int regndx = igb_find_vlvf_entry(adapter, vid);
  		if (regndx < 0)
  			goto out;
  		/* See if any other pools are set for this VLAN filter
  		 * entry other than the PF.
  		 */
  		vlvf = bits = E1000_READ_REG(hw, E1000_VLVF(regndx));
  		bits &= 1 << (E1000_VLVF_POOLSEL_SHIFT +
  			      adapter->vfs_allocated_count);
  		/* If the filter was removed then ensure PF pool bit
  		 * is cleared if the PF only added itself to the pool
  		 * because the PF is in promiscuous mode.
  		 */
  		if ((vlvf & VLAN_VID_MASK) == vid &&
  #ifndef HAVE_VLAN_RX_REGISTER
  		    !test_bit(vid, adapter->active_vlans) &&
  #endif
  		    !bits)
  			igb_vlvf_set(adapter, vid, add,
  				     adapter->vfs_allocated_count);
  	}
  
  out:
  	return err;
  }
  
  static inline void igb_vf_reset(struct igb_adapter *adapter, u32 vf)
  {
  	struct e1000_hw *hw = &adapter->hw;
  
  	/* clear flags except flag that the PF has set the MAC */
  	adapter->vf_data[vf].flags &= IGB_VF_FLAG_PF_SET_MAC;
  	adapter->vf_data[vf].last_nack = jiffies;
  
  	/* reset offloads to defaults */
  	igb_set_vmolr(adapter, vf, true);
  
  	/* reset vlans for device */
  	igb_clear_vf_vfta(adapter, vf);
  #ifdef IFLA_VF_MAX
  	if (adapter->vf_data[vf].pf_vlan)
  		igb_ndo_set_vf_vlan(adapter->netdev, vf,
  				    adapter->vf_data[vf].pf_vlan,
  #ifdef HAVE_VF_VLAN_PROTO
  				    adapter->vf_data[vf].pf_qos,
  				    htons(ETH_P_8021Q));
  #else
  				    adapter->vf_data[vf].pf_qos);
  #endif
  	else
  		igb_clear_vf_vfta(adapter, vf);
  #endif
  
  	/* reset multicast table array for vf */
  	adapter->vf_data[vf].num_vf_mc_hashes = 0;
  
  	/* Flush and reset the mta with the new values */
  	igb_set_rx_mode(adapter->netdev);
  
  	/*
  	 * Reset the VFs TDWBAL and TDWBAH registers which are not
  	 * cleared by a VFLR
  	 */
  	E1000_WRITE_REG(hw, E1000_TDWBAH(vf), 0);
  	E1000_WRITE_REG(hw, E1000_TDWBAL(vf), 0);
  	if (hw->mac.type == e1000_82576) {
  		E1000_WRITE_REG(hw, E1000_TDWBAH(IGB_MAX_VF_FUNCTIONS + vf), 0);
  		E1000_WRITE_REG(hw, E1000_TDWBAL(IGB_MAX_VF_FUNCTIONS + vf), 0);
  	}
  }
  
  static void igb_vf_reset_event(struct igb_adapter *adapter, u32 vf)
  {
  	unsigned char *vf_mac = adapter->vf_data[vf].vf_mac_addresses;
  
  	/* generate a new mac address as we were hotplug removed/added */
  	if (!(adapter->vf_data[vf].flags & IGB_VF_FLAG_PF_SET_MAC))
  		random_ether_addr(vf_mac);
  
  	/* process remaining reset events */
  	igb_vf_reset(adapter, vf);
  }
  
  static void igb_vf_reset_msg(struct igb_adapter *adapter, u32 vf)
  {
  	struct e1000_hw *hw = &adapter->hw;
  	unsigned char *vf_mac = adapter->vf_data[vf].vf_mac_addresses;
  	u32 reg, msgbuf[3];
  	u8 *addr = (u8 *)(&msgbuf[1]);
  
  	/* process all the same items cleared in a function level reset */
  	igb_vf_reset(adapter, vf);
  
  	/* set vf mac address */
  	igb_del_mac_filter(adapter, vf_mac, vf);
  	igb_add_mac_filter(adapter, vf_mac, vf);
  
  	/* enable transmit and receive for vf */
  	reg = E1000_READ_REG(hw, E1000_VFTE);
  	E1000_WRITE_REG(hw, E1000_VFTE, reg | (1 << vf));
  	reg = E1000_READ_REG(hw, E1000_VFRE);
  	E1000_WRITE_REG(hw, E1000_VFRE, reg | (1 << vf));
  
  	adapter->vf_data[vf].flags |= IGB_VF_FLAG_CTS;
  
  	/* reply to reset with ack and vf mac address */
  	msgbuf[0] = E1000_VF_RESET | E1000_VT_MSGTYPE_ACK;
  	memcpy(addr, vf_mac, 6);
  	e1000_write_mbx(hw, msgbuf, 3, vf);
  }
  
  static int igb_set_vf_mac_addr(struct igb_adapter *adapter, u32 *msg, int vf)
  {
  	/*
  	 * The VF MAC Address is stored in a packed array of bytes
  	 * starting at the second 32 bit word of the msg array
  	 */
  	unsigned char *addr = (unsigned char *)&msg[1];
  	int err = -1;
  
  	if (is_valid_ether_addr(addr))
  		err = igb_set_vf_mac(adapter, vf, addr);
  
  	return err;
  }
  
  static void igb_rcv_ack_from_vf(struct igb_adapter *adapter, u32 vf)
  {
  	struct e1000_hw *hw = &adapter->hw;
  	struct vf_data_storage *vf_data = &adapter->vf_data[vf];
  	u32 msg = E1000_VT_MSGTYPE_NACK;
  
  	/* if device isn't clear to send it shouldn't be reading either */
  	if (!(vf_data->flags & IGB_VF_FLAG_CTS) &&
  	    time_after(jiffies, vf_data->last_nack + (2 * HZ))) {
  		e1000_write_mbx(hw, &msg, 1, vf);
  		vf_data->last_nack = jiffies;
  	}
  }
  
  static void igb_rcv_msg_from_vf(struct igb_adapter *adapter, u32 vf)
  {
  	struct pci_dev *pdev = adapter->pdev;
  	u32 msgbuf[E1000_VFMAILBOX_SIZE];
  	struct e1000_hw *hw = &adapter->hw;
  	struct vf_data_storage *vf_data = &adapter->vf_data[vf];
  	s32 retval;
  
  	retval = e1000_read_mbx(hw, msgbuf, E1000_VFMAILBOX_SIZE, vf);
  
  	if (retval) {
  		dev_err(pci_dev_to_dev(pdev), "Error receiving message from VF\n");
  		return;
  	}
  
  	/* this is a message we already processed, do nothing */
  	if (msgbuf[0] & (E1000_VT_MSGTYPE_ACK | E1000_VT_MSGTYPE_NACK))
  		return;
  
  	/*
  	 * until the vf completes a reset it should not be
  	 * allowed to start any configuration.
  	 */
  
  	if (msgbuf[0] == E1000_VF_RESET) {
  		igb_vf_reset_msg(adapter, vf);
  		return;
  	}
  
  	if (!(vf_data->flags & IGB_VF_FLAG_CTS)) {
  		msgbuf[0] = E1000_VT_MSGTYPE_NACK;
  		if (time_after(jiffies, vf_data->last_nack + (2 * HZ))) {
  			e1000_write_mbx(hw, msgbuf, 1, vf);
  			vf_data->last_nack = jiffies;
  		}
  		return;
  	}
  
  	switch ((msgbuf[0] & 0xFFFF)) {
  	case E1000_VF_SET_MAC_ADDR:
  		retval = -EINVAL;
  #ifndef IGB_DISABLE_VF_MAC_SET
  		if (!(vf_data->flags & IGB_VF_FLAG_PF_SET_MAC))
  			retval = igb_set_vf_mac_addr(adapter, msgbuf, vf);
  		else
  			DPRINTK(DRV, INFO,
  				"VF %d attempted to override administratively "
  				"set MAC address\nReload the VF driver to "
  				"resume operations\n", vf);
  #endif
  		break;
  	case E1000_VF_SET_PROMISC:
  		retval = igb_set_vf_promisc(adapter, msgbuf, vf);
  		break;
  	case E1000_VF_SET_MULTICAST:
  		retval = igb_set_vf_multicasts(adapter, msgbuf, vf);
  		break;
  	case E1000_VF_SET_LPE:
  		retval = igb_set_vf_rlpml(adapter, msgbuf[1], vf);
  		break;
  	case E1000_VF_SET_VLAN:
  		retval = -1;
  #ifdef IFLA_VF_MAX
  		if (vf_data->pf_vlan)
  			DPRINTK(DRV, INFO,
  				"VF %d attempted to override administratively "
  				"set VLAN tag\nReload the VF driver to "
  				"resume operations\n", vf);
  		else
  #endif
  			retval = igb_set_vf_vlan(adapter, msgbuf, vf);
  		break;
  	default:
  		dev_err(pci_dev_to_dev(pdev), "Unhandled Msg %08x\n", msgbuf[0]);
  		retval = -E1000_ERR_MBX;
  		break;
  	}
  
  	/* notify the VF of the results of what it sent us */
  	if (retval)
  		msgbuf[0] |= E1000_VT_MSGTYPE_NACK;
  	else
  		msgbuf[0] |= E1000_VT_MSGTYPE_ACK;
  
  	msgbuf[0] |= E1000_VT_MSGTYPE_CTS;
  
  	e1000_write_mbx(hw, msgbuf, 1, vf);
  }
  
  static void igb_msg_task(struct igb_adapter *adapter)
  {
  	struct e1000_hw *hw = &adapter->hw;
  	u32 vf;
  
  	for (vf = 0; vf < adapter->vfs_allocated_count; vf++) {
  		/* process any reset requests */
  		if (!e1000_check_for_rst(hw, vf))
  			igb_vf_reset_event(adapter, vf);
  
  		/* process any messages pending */
  		if (!e1000_check_for_msg(hw, vf))
  			igb_rcv_msg_from_vf(adapter, vf);
  
  		/* process any acks */
  		if (!e1000_check_for_ack(hw, vf))
  			igb_rcv_ack_from_vf(adapter, vf);
  	}
  }
  
  /**
   *  igb_set_uta - Set unicast filter table address
   *  @adapter: board private structure
   *
   *  The unicast table address is a register array of 32-bit registers.
   *  The table is meant to be used in a way similar to how the MTA is used
   *  however due to certain limitations in the hardware it is necessary to
   *  set all the hash bits to 1 and use the VMOLR ROPE bit as a promiscuous
   *  enable bit to allow vlan tag stripping when promiscuous mode is enabled
   **/
  static void igb_set_uta(struct igb_adapter *adapter)
  {
  	struct e1000_hw *hw = &adapter->hw;
  	int i;
  
  	/* The UTA table only exists on 82576 hardware and newer */
  	if (hw->mac.type < e1000_82576)
  		return;
  
  	/* we only need to do this if VMDq is enabled */
  	if (!adapter->vmdq_pools)
  		return;
  
  	for (i = 0; i < hw->mac.uta_reg_count; i++)
  		E1000_WRITE_REG_ARRAY(hw, E1000_UTA, i, ~0);
  }
  
  /**
   * igb_intr_msi - Interrupt Handler
   * @irq: interrupt number
   * @data: pointer to a network interface device structure
   **/
  static irqreturn_t igb_intr_msi(int irq, void *data)
  {
  	struct igb_adapter *adapter = data;
  	struct igb_q_vector *q_vector = adapter->q_vector[0];
  	struct e1000_hw *hw = &adapter->hw;
  	/* read ICR disables interrupts using IAM */
  	u32 icr = E1000_READ_REG(hw, E1000_ICR);
  
  	igb_write_itr(q_vector);
  
  	if (icr & E1000_ICR_DRSTA)
  		schedule_work(&adapter->reset_task);
  
  	if (icr & E1000_ICR_DOUTSYNC) {
  		/* HW is reporting DMA is out of sync */
  		adapter->stats.doosync++;
  	}
  
  	if (icr & (E1000_ICR_RXSEQ | E1000_ICR_LSC)) {
  		hw->mac.get_link_status = 1;
  		if (!test_bit(__IGB_DOWN, &adapter->state))
  			mod_timer(&adapter->watchdog_timer, jiffies + 1);
  	}
  
  #ifdef HAVE_PTP_1588_CLOCK
  	if (icr & E1000_ICR_TS) {
  		u32 tsicr = E1000_READ_REG(hw, E1000_TSICR);
  
  		if (tsicr & E1000_TSICR_TXTS) {
  			/* acknowledge the interrupt */
  			E1000_WRITE_REG(hw, E1000_TSICR, E1000_TSICR_TXTS);
  			/* retrieve hardware timestamp */
  			schedule_work(&adapter->ptp_tx_work);
  		}
  	}
  #endif /* HAVE_PTP_1588_CLOCK */
  
  	napi_schedule(&q_vector->napi);
  
  	return IRQ_HANDLED;
  }
  
  /**
   * igb_intr - Legacy Interrupt Handler
   * @irq: interrupt number
   * @data: pointer to a network interface device structure
   **/
  static irqreturn_t igb_intr(int irq, void *data)
  {
  	struct igb_adapter *adapter = data;
  	struct igb_q_vector *q_vector = adapter->q_vector[0];
  	struct e1000_hw *hw = &adapter->hw;
  	/* Interrupt Auto-Mask...upon reading ICR, interrupts are masked.  No
  	 * need for the IMC write */
  	u32 icr = E1000_READ_REG(hw, E1000_ICR);
  
  	/* IMS will not auto-mask if INT_ASSERTED is not set, and if it is
  	 * not set, then the adapter didn't send an interrupt */
  	if (!(icr & E1000_ICR_INT_ASSERTED))
  		return IRQ_NONE;
  
  	igb_write_itr(q_vector);
  
  	if (icr & E1000_ICR_DRSTA)
  		schedule_work(&adapter->reset_task);
  
  	if (icr & E1000_ICR_DOUTSYNC) {
  		/* HW is reporting DMA is out of sync */
  		adapter->stats.doosync++;
  	}
  
  	if (icr & (E1000_ICR_RXSEQ | E1000_ICR_LSC)) {
  		hw->mac.get_link_status = 1;
  		/* guard against interrupt when we're going down */
  		if (!test_bit(__IGB_DOWN, &adapter->state))
  			mod_timer(&adapter->watchdog_timer, jiffies + 1);
  	}
  
  #ifdef HAVE_PTP_1588_CLOCK
  	if (icr & E1000_ICR_TS) {
  		u32 tsicr = E1000_READ_REG(hw, E1000_TSICR);
  
  		if (tsicr & E1000_TSICR_TXTS) {
  			/* acknowledge the interrupt */
  			E1000_WRITE_REG(hw, E1000_TSICR, E1000_TSICR_TXTS);
  			/* retrieve hardware timestamp */
  			schedule_work(&adapter->ptp_tx_work);
  		}
  	}
  #endif /* HAVE_PTP_1588_CLOCK */
  
  	napi_schedule(&q_vector->napi);
  
  	return IRQ_HANDLED;
  }
  
  void igb_ring_irq_enable(struct igb_q_vector *q_vector)
  {
  	struct igb_adapter *adapter = q_vector->adapter;
  	struct e1000_hw *hw = &adapter->hw;
  
  	if ((q_vector->rx.ring && (adapter->rx_itr_setting & 3)) ||
  	    (!q_vector->rx.ring && (adapter->tx_itr_setting & 3))) {
  		if ((adapter->num_q_vectors == 1) && !adapter->vf_data)
  			igb_set_itr(q_vector);
  		else
  			igb_update_ring_itr(q_vector);
  	}
  
  	if (!test_bit(__IGB_DOWN, &adapter->state)) {
  		if (adapter->msix_entries)
  			E1000_WRITE_REG(hw, E1000_EIMS, q_vector->eims_value);
  		else
  			igb_irq_enable(adapter);
  	}
  }
  
  /**
   * igb_poll - NAPI Rx polling callback
   * @napi: napi polling structure
   * @budget: count of how many packets we should handle
   **/
  static int igb_poll(struct napi_struct *napi, int budget)
  {
  	struct igb_q_vector *q_vector = container_of(napi, struct igb_q_vector, napi);
  	bool clean_complete = true;
  
  #ifdef IGB_DCA
  	if (q_vector->adapter->flags & IGB_FLAG_DCA_ENABLED)
  		igb_update_dca(q_vector);
  #endif
  	if (q_vector->tx.ring)
  		clean_complete = igb_clean_tx_irq(q_vector);
  
  	if (q_vector->rx.ring)
  		clean_complete &= igb_clean_rx_irq(q_vector, budget);
  
  #ifndef HAVE_NETDEV_NAPI_LIST
  	/* if netdev is disabled we need to stop polling */
  	if (!netif_running(q_vector->adapter->netdev))
  		clean_complete = true;
  
  #endif
  	/* If all work not completed, return budget and keep polling */
  	if (!clean_complete)
  		return budget;
  
  	/* If not enough Rx work done, exit the polling mode */
  	napi_complete(napi);
  	igb_ring_irq_enable(q_vector);
  
  	return 0;
  }
  
  /**
   * igb_clean_tx_irq - Reclaim resources after transmit completes
   * @q_vector: pointer to q_vector containing needed info
   * returns TRUE if ring is completely cleaned
   **/
  static bool igb_clean_tx_irq(struct igb_q_vector *q_vector)
  {
  	struct igb_adapter *adapter = q_vector->adapter;
  	struct igb_ring *tx_ring = q_vector->tx.ring;
  	struct igb_tx_buffer *tx_buffer;
  	union e1000_adv_tx_desc *tx_desc;
  	unsigned int total_bytes = 0, total_packets = 0;
  	unsigned int budget = q_vector->tx.work_limit;
  	unsigned int i = tx_ring->next_to_clean;
  
  	if (test_bit(__IGB_DOWN, &adapter->state))
  		return true;
  
  	tx_buffer = &tx_ring->tx_buffer_info[i];
  	tx_desc = IGB_TX_DESC(tx_ring, i);
  	i -= tx_ring->count;
  
  	do {
  		union e1000_adv_tx_desc *eop_desc = tx_buffer->next_to_watch;
  
  		/* if next_to_watch is not set then there is no work pending */
  		if (!eop_desc)
  			break;
  
  		/* prevent any other reads prior to eop_desc */
  		read_barrier_depends();
  
  		/* if DD is not set pending work has not been completed */
  		if (!(eop_desc->wb.status & cpu_to_le32(E1000_TXD_STAT_DD)))
  			break;
  
  		/* clear next_to_watch to prevent false hangs */
  		tx_buffer->next_to_watch = NULL;
  
  		/* update the statistics for this packet */
  		total_bytes += tx_buffer->bytecount;
  		total_packets += tx_buffer->gso_segs;
  
  		/* free the skb */
  		dev_kfree_skb_any(tx_buffer->skb);
  
  		/* unmap skb header data */
  		dma_unmap_single(tx_ring->dev,
  		                 dma_unmap_addr(tx_buffer, dma),
  		                 dma_unmap_len(tx_buffer, len),
  		                 DMA_TO_DEVICE);
  
  		/* clear tx_buffer data */
  		tx_buffer->skb = NULL;
  		dma_unmap_len_set(tx_buffer, len, 0);
  
  		/* clear last DMA location and unmap remaining buffers */
  		while (tx_desc != eop_desc) {
  			tx_buffer++;
  			tx_desc++;
  			i++;
  			if (unlikely(!i)) {
  				i -= tx_ring->count;
  				tx_buffer = tx_ring->tx_buffer_info;
  				tx_desc = IGB_TX_DESC(tx_ring, 0);
  			}
  
  			/* unmap any remaining paged data */
  			if (dma_unmap_len(tx_buffer, len)) {
  				dma_unmap_page(tx_ring->dev,
  				               dma_unmap_addr(tx_buffer, dma),
  				               dma_unmap_len(tx_buffer, len),
  				               DMA_TO_DEVICE);
  				dma_unmap_len_set(tx_buffer, len, 0);
  			}
  		}
  
  		/* move us one more past the eop_desc for start of next pkt */
  		tx_buffer++;
  		tx_desc++;
  		i++;
  		if (unlikely(!i)) {
  			i -= tx_ring->count;
  			tx_buffer = tx_ring->tx_buffer_info;
  			tx_desc = IGB_TX_DESC(tx_ring, 0);
  		}
  
  		/* issue prefetch for next Tx descriptor */
  		prefetch(tx_desc);
  
  		/* update budget accounting */
  		budget--;
  	} while (likely(budget));
  
  	netdev_tx_completed_queue(txring_txq(tx_ring),
  				  total_packets, total_bytes);
  
  	i += tx_ring->count;
  	tx_ring->next_to_clean = i;
  	tx_ring->tx_stats.bytes += total_bytes;
  	tx_ring->tx_stats.packets += total_packets;
  	q_vector->tx.total_bytes += total_bytes;
  	q_vector->tx.total_packets += total_packets;
  
  #ifdef DEBUG
  	if (test_bit(IGB_RING_FLAG_TX_DETECT_HANG, &tx_ring->flags) &&
  	    !(adapter->disable_hw_reset && adapter->tx_hang_detected)) {
  #else
  	if (test_bit(IGB_RING_FLAG_TX_DETECT_HANG, &tx_ring->flags)) {
  #endif
  		struct e1000_hw *hw = &adapter->hw;
  
  		/* Detect a transmit hang in hardware, this serializes the
  		 * check with the clearing of time_stamp and movement of i */
  		clear_bit(IGB_RING_FLAG_TX_DETECT_HANG, &tx_ring->flags);
  		if (tx_buffer->next_to_watch &&
  		    time_after(jiffies, tx_buffer->time_stamp +
  		               (adapter->tx_timeout_factor * HZ))
  		    && !(E1000_READ_REG(hw, E1000_STATUS) &
  		         E1000_STATUS_TXOFF)) {
  
  			/* detected Tx unit hang */
  #ifdef DEBUG
  			adapter->tx_hang_detected = TRUE;
  			if (adapter->disable_hw_reset) {
  				DPRINTK(DRV, WARNING,
  					"Deactivating netdev watchdog timer\n");
  				if (del_timer(&netdev_ring(tx_ring)->watchdog_timer))
  					dev_put(netdev_ring(tx_ring));
  #ifndef HAVE_NET_DEVICE_OPS
  				netdev_ring(tx_ring)->tx_timeout = NULL;
  #endif
  			}
  #endif /* DEBUG */
  			dev_err(tx_ring->dev,
  				"Detected Tx Unit Hang\n"
  				"  Tx Queue             <%d>\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        <%p>\n"
  				"  jiffies              <%lx>\n"
  				"  desc.status          <%x>\n",
  				tx_ring->queue_index,
  				E1000_READ_REG(hw, E1000_TDH(tx_ring->reg_idx)),
  				readl(tx_ring->tail),
  				tx_ring->next_to_use,
  				tx_ring->next_to_clean,
  				tx_buffer->time_stamp,
  				tx_buffer->next_to_watch,
  				jiffies,
  				tx_buffer->next_to_watch->wb.status);
  			if (netif_is_multiqueue(netdev_ring(tx_ring)))
  				netif_stop_subqueue(netdev_ring(tx_ring),
  						    ring_queue_index(tx_ring));
  			else
  				netif_stop_queue(netdev_ring(tx_ring));
  
  			/* we are about to reset, no point in enabling stuff */
  			return true;
  		}
  	}
  
  #define TX_WAKE_THRESHOLD (DESC_NEEDED * 2)
  	if (unlikely(total_packets &&
  		     netif_carrier_ok(netdev_ring(tx_ring)) &&
  		     igb_desc_unused(tx_ring) >= TX_WAKE_THRESHOLD)) {
  		/* Make sure that anybody stopping the queue after this
  		 * sees the new next_to_clean.
  		 */
  		smp_mb();
  		if (netif_is_multiqueue(netdev_ring(tx_ring))) {
  			if (__netif_subqueue_stopped(netdev_ring(tx_ring),
  						     ring_queue_index(tx_ring)) &&
  			    !(test_bit(__IGB_DOWN, &adapter->state))) {
  				netif_wake_subqueue(netdev_ring(tx_ring),
  						    ring_queue_index(tx_ring));
  				tx_ring->tx_stats.restart_queue++;
  			}
  		} else {
  			if (netif_queue_stopped(netdev_ring(tx_ring)) &&
  			    !(test_bit(__IGB_DOWN, &adapter->state))) {
  				netif_wake_queue(netdev_ring(tx_ring));
  				tx_ring->tx_stats.restart_queue++;
  			}
  		}
  	}
  
  	return !!budget;
  }
  
  #ifdef HAVE_VLAN_RX_REGISTER
  /**
   * igb_receive_skb - helper function to handle rx indications
   * @q_vector: structure containing interrupt and ring information
   * @skb: packet to send up
   **/
  static void igb_receive_skb(struct igb_q_vector *q_vector,
                              struct sk_buff *skb)
  {
  	struct vlan_group **vlgrp = netdev_priv(skb->dev);
  
  	if (IGB_CB(skb)->vid) {
  		if (*vlgrp) {
  			vlan_gro_receive(&q_vector->napi, *vlgrp,
  					 IGB_CB(skb)->vid, skb);
  		} else {
  			dev_kfree_skb_any(skb);
  		}
  	} else {
  		napi_gro_receive(&q_vector->napi, skb);
  	}
  }
  
  #endif /* HAVE_VLAN_RX_REGISTER */
  #ifndef CONFIG_IGB_DISABLE_PACKET_SPLIT
  /**
   * igb_reuse_rx_page - page flip buffer and store it back on the ring
   * @rx_ring: rx descriptor ring to store buffers on
   * @old_buff: donor buffer to have page reused
   *
   * Synchronizes page for reuse by the adapter
   **/
  static void igb_reuse_rx_page(struct igb_ring *rx_ring,
  			      struct igb_rx_buffer *old_buff)
  {
  	struct igb_rx_buffer *new_buff;
  	u16 nta = rx_ring->next_to_alloc;
  
  	new_buff = &rx_ring->rx_buffer_info[nta];
  
  	/* update, and store next to alloc */
  	nta++;
  	rx_ring->next_to_alloc = (nta < rx_ring->count) ? nta : 0;
  
  	/* transfer page from old buffer to new buffer */
  	memcpy(new_buff, old_buff, sizeof(struct igb_rx_buffer));
  
  	/* sync the buffer for use by the device */
  	dma_sync_single_range_for_device(rx_ring->dev, old_buff->dma,
  					 old_buff->page_offset,
  					 IGB_RX_BUFSZ,
  					 DMA_FROM_DEVICE);
  }
  
  static bool igb_can_reuse_rx_page(struct igb_rx_buffer *rx_buffer,
  				  struct page *page,
  				  unsigned int truesize)
  {
  	/* avoid re-using remote pages */
  	if (unlikely(page_to_nid(page) != numa_node_id()))
  		return false;
  
  #if (PAGE_SIZE < 8192)
  	/* if we are only owner of page we can reuse it */
  	if (unlikely(page_count(page) != 1))
  		return false;
  
  	/* flip page offset to other buffer */
  	rx_buffer->page_offset ^= IGB_RX_BUFSZ;
  
  #else
  	/* move offset up to the next cache line */
  	rx_buffer->page_offset += truesize;
  
  	if (rx_buffer->page_offset > (PAGE_SIZE - IGB_RX_BUFSZ))
  		return false;
  #endif
  
  	/* bump ref count on page before it is given to the stack */
  	get_page(page);
  
  	return true;
  }
  
  /**
   * igb_add_rx_frag - Add contents of Rx buffer to sk_buff
   * @rx_ring: rx descriptor ring to transact packets on
   * @rx_buffer: buffer containing page to add
   * @rx_desc: descriptor containing length of buffer written by hardware
   * @skb: sk_buff to place the data into
   *
   * This function will add the data contained in rx_buffer->page to the skb.
   * This is done either through a direct copy if the data in the buffer is
   * less than the skb header size, otherwise it will just attach the page as
   * a frag to the skb.
   *
   * The function will then update the page offset if necessary and return
   * true if the buffer can be reused by the adapter.
   **/
  static bool igb_add_rx_frag(struct igb_ring *rx_ring,
  			    struct igb_rx_buffer *rx_buffer,
  			    union e1000_adv_rx_desc *rx_desc,
  			    struct sk_buff *skb)
  {
  	struct page *page = rx_buffer->page;
  	unsigned int size = le16_to_cpu(rx_desc->wb.upper.length);
  #if (PAGE_SIZE < 8192)
  	unsigned int truesize = IGB_RX_BUFSZ;
  #else
  	unsigned int truesize = ALIGN(size, L1_CACHE_BYTES);
  #endif
  
  	if ((size <= IGB_RX_HDR_LEN) && !skb_is_nonlinear(skb)) {
  		unsigned char *va = page_address(page) + rx_buffer->page_offset;
  
  #ifdef HAVE_PTP_1588_CLOCK
  		if (igb_test_staterr(rx_desc, E1000_RXDADV_STAT_TSIP)) {
  			igb_ptp_rx_pktstamp(rx_ring->q_vector, va, skb);
  			va += IGB_TS_HDR_LEN;
  			size -= IGB_TS_HDR_LEN;
  		}
  #endif /* HAVE_PTP_1588_CLOCK */
  
  		memcpy(__skb_put(skb, size), va, ALIGN(size, sizeof(long)));
  
  		/* we can reuse buffer as-is, just make sure it is local */
  		if (likely(page_to_nid(page) == numa_node_id()))
  			return true;
  
  		/* this page cannot be reused so discard it */
  		put_page(page);
  		return false;
  	}
  
  	skb_add_rx_frag(skb, skb_shinfo(skb)->nr_frags, page,
  			rx_buffer->page_offset, size, truesize);
  
  	return igb_can_reuse_rx_page(rx_buffer, page, truesize);
  }
  
  static struct sk_buff *igb_fetch_rx_buffer(struct igb_ring *rx_ring,
  					   union e1000_adv_rx_desc *rx_desc,
  					   struct sk_buff *skb)
  {
  	struct igb_rx_buffer *rx_buffer;
  	struct page *page;
  
  	rx_buffer = &rx_ring->rx_buffer_info[rx_ring->next_to_clean];
  
  	page = rx_buffer->page;
  	prefetchw(page);
  
  	if (likely(!skb)) {
  		void *page_addr = page_address(page) +
  				  rx_buffer->page_offset;
  
  		/* prefetch first cache line of first page */
  		prefetch(page_addr);
  #if L1_CACHE_BYTES < 128
  		prefetch(page_addr + L1_CACHE_BYTES);
  #endif
  
  		/* allocate a skb to store the frags */
  		skb = netdev_alloc_skb_ip_align(rx_ring->netdev,
  						IGB_RX_HDR_LEN);
  		if (unlikely(!skb)) {
  			rx_ring->rx_stats.alloc_failed++;
  			return NULL;
  		}
  
  		/*
  		 * we will be copying header into skb->data in
  		 * pskb_may_pull so it is in our interest to prefetch
  		 * it now to avoid a possible cache miss
  		 */
  		prefetchw(skb->data);
  	}
  
  	/* we are reusing so sync this buffer for CPU use */
  	dma_sync_single_range_for_cpu(rx_ring->dev,
  				      rx_buffer->dma,
  				      rx_buffer->page_offset,
  				      IGB_RX_BUFSZ,
  				      DMA_FROM_DEVICE);
  
  	/* pull page into skb */
  	if (igb_add_rx_frag(rx_ring, rx_buffer, rx_desc, skb)) {
  		/* hand second half of page back to the ring */
  		igb_reuse_rx_page(rx_ring, rx_buffer);
  	} else {
  		/* we are not reusing the buffer so unmap it */
  		dma_unmap_page(rx_ring->dev, rx_buffer->dma,
  			       PAGE_SIZE, DMA_FROM_DEVICE);
  	}
  
  	/* clear contents of rx_buffer */
  	rx_buffer->page = NULL;
  
  	return skb;
  }
  
  #endif
  static inline void igb_rx_checksum(struct igb_ring *ring,
  				   union e1000_adv_rx_desc *rx_desc,
  				   struct sk_buff *skb)
  {
  	skb_checksum_none_assert(skb);
  
  	/* Ignore Checksum bit is set */
  	if (igb_test_staterr(rx_desc, E1000_RXD_STAT_IXSM))
  		return;
  
  	/* Rx checksum disabled via ethtool */
  	if (!(netdev_ring(ring)->features & NETIF_F_RXCSUM))
  		return;
  
  	/* TCP/UDP checksum error bit is set */
  	if (igb_test_staterr(rx_desc,
  			     E1000_RXDEXT_STATERR_TCPE |
  			     E1000_RXDEXT_STATERR_IPE)) {
  		/*
  		 * work around errata with sctp packets where the TCPE aka
  		 * L4E bit is set incorrectly on 64 byte (60 byte w/o crc)
  		 * packets, (aka let the stack check the crc32c)
  		 */
  		if (!((skb->len == 60) &&
  		      test_bit(IGB_RING_FLAG_RX_SCTP_CSUM, &ring->flags)))
  			ring->rx_stats.csum_err++;
  
  		/* let the stack verify checksum errors */
  		return;
  	}
  	/* It must be a TCP or UDP packet with a valid checksum */
  	if (igb_test_staterr(rx_desc, E1000_RXD_STAT_TCPCS |
  				      E1000_RXD_STAT_UDPCS))
  		skb->ip_summed = CHECKSUM_UNNECESSARY;
  }
  
  #ifdef NETIF_F_RXHASH
  static inline void igb_rx_hash(struct igb_ring *ring,
  			       union e1000_adv_rx_desc *rx_desc,
  			       struct sk_buff *skb)
  {
  	if (netdev_ring(ring)->features & NETIF_F_RXHASH)
  		skb_set_hash(skb, le32_to_cpu(rx_desc->wb.lower.hi_dword.rss),
  			     PKT_HASH_TYPE_L3);
  }
  
  #endif
  #ifndef IGB_NO_LRO
  #ifdef CONFIG_IGB_DISABLE_PACKET_SPLIT
  /**
   * igb_merge_active_tail - merge active tail into lro skb
   * @tail: pointer to active tail in frag_list
   *
   * This function merges the length and data of an active tail into the
   * skb containing the frag_list.  It resets the tail's pointer to the head,
   * but it leaves the heads pointer to tail intact.
   **/
  static inline struct sk_buff *igb_merge_active_tail(struct sk_buff *tail)
  {
  	struct sk_buff *head = IGB_CB(tail)->head;
  
  	if (!head)
  		return tail;
  
  	head->len += tail->len;
  	head->data_len += tail->len;
  	head->truesize += tail->len;
  
  	IGB_CB(tail)->head = NULL;
  
  	return head;
  }
  
  /**
   * igb_add_active_tail - adds an active tail into the skb frag_list
   * @head: pointer to the start of the skb
   * @tail: pointer to active tail to add to frag_list
   *
   * This function adds an active tail to the end of the frag list.  This tail
   * will still be receiving data so we cannot yet ad it's stats to the main
   * skb.  That is done via igb_merge_active_tail.
   **/
  static inline void igb_add_active_tail(struct sk_buff *head, struct sk_buff *tail)
  {
  	struct sk_buff *old_tail = IGB_CB(head)->tail;
  
  	if (old_tail) {
  		igb_merge_active_tail(old_tail);
  		old_tail->next = tail;
  	} else {
  		skb_shinfo(head)->frag_list = tail;
  	}
  
  	IGB_CB(tail)->head = head;
  	IGB_CB(head)->tail = tail;
  
  	IGB_CB(head)->append_cnt++;
  }
  
  /**
   * igb_close_active_frag_list - cleanup pointers on a frag_list skb
   * @head: pointer to head of an active frag list
   *
   * This function will clear the frag_tail_tracker pointer on an active
   * frag_list and returns true if the pointer was actually set
   **/
  static inline bool igb_close_active_frag_list(struct sk_buff *head)
  {
  	struct sk_buff *tail = IGB_CB(head)->tail;
  
  	if (!tail)
  		return false;
  
  	igb_merge_active_tail(tail);
  
  	IGB_CB(head)->tail = NULL;
  
  	return true;
  }
  
  #endif /* CONFIG_IGB_DISABLE_PACKET_SPLIT */
  /**
   * igb_can_lro - returns true if packet is TCP/IPV4 and LRO is enabled
   * @adapter: board private structure
   * @rx_desc: pointer to the rx descriptor
   * @skb: pointer to the skb to be merged
   *
   **/
  static inline bool igb_can_lro(struct igb_ring *rx_ring,
  			       union e1000_adv_rx_desc *rx_desc,
  			       struct sk_buff *skb)
  {
  	struct iphdr *iph = (struct iphdr *)skb->data;
  	__le16 pkt_info = rx_desc->wb.lower.lo_dword.hs_rss.pkt_info;
  
  	/* verify hardware indicates this is IPv4/TCP */
  	if((!(pkt_info & cpu_to_le16(E1000_RXDADV_PKTTYPE_TCP)) ||
  	    !(pkt_info & cpu_to_le16(E1000_RXDADV_PKTTYPE_IPV4))))
  		return false;
  
  	/* .. and LRO is enabled */
  	if (!(netdev_ring(rx_ring)->features & NETIF_F_LRO))
  		return false;
  
  	/* .. and we are not in promiscuous mode */
  	if (netdev_ring(rx_ring)->flags & IFF_PROMISC)
  		return false;
  
  	/* .. and the header is large enough for us to read IP/TCP fields */
  	if (!pskb_may_pull(skb, sizeof(struct igb_lrohdr)))
  		return false;
  
  	/* .. and there are no VLANs on packet */
  	if (skb->protocol != __constant_htons(ETH_P_IP))
  		return false;
  
  	/* .. and we are version 4 with no options */
  	if (*(u8 *)iph != 0x45)
  		return false;
  
  	/* .. and the packet is not fragmented */
  	if (iph->frag_off & htons(IP_MF | IP_OFFSET))
  		return false;
  
  	/* .. and that next header is TCP */
  	if (iph->protocol != IPPROTO_TCP)
  		return false;
  
  	return true;
  }
  
  static inline struct igb_lrohdr *igb_lro_hdr(struct sk_buff *skb)
  {
  	return (struct igb_lrohdr *)skb->data;
  }
  
  /**
   * igb_lro_flush - Indicate packets to upper layer.
   *
   * Update IP and TCP header part of head skb if more than one
   * skb's chained and indicate packets to upper layer.
   **/
  static void igb_lro_flush(struct igb_q_vector *q_vector,
  			  struct sk_buff *skb)
  {
  	struct igb_lro_list *lrolist = &q_vector->lrolist;
  
  	__skb_unlink(skb, &lrolist->active);
  
  	if (IGB_CB(skb)->append_cnt) {
  		struct igb_lrohdr *lroh = igb_lro_hdr(skb);
  
  #ifdef CONFIG_IGB_DISABLE_PACKET_SPLIT
  		/* close any active lro contexts */
  		igb_close_active_frag_list(skb);
  
  #endif
  		/* incorporate ip header and re-calculate checksum */
  		lroh->iph.tot_len = ntohs(skb->len);
  		lroh->iph.check = 0;
  
  		/* header length is 5 since we know no options exist */
  		lroh->iph.check = ip_fast_csum((u8 *)lroh, 5);
  
  		/* clear TCP checksum to indicate we are an LRO frame */
  		lroh->th.check = 0;
  
  		/* incorporate latest timestamp into the tcp header */
  		if (IGB_CB(skb)->tsecr) {
  			lroh->ts[2] = IGB_CB(skb)->tsecr;
  			lroh->ts[1] = htonl(IGB_CB(skb)->tsval);
  		}
  #ifdef NETIF_F_GSO
  
  		skb_shinfo(skb)->gso_size = IGB_CB(skb)->mss;
  		skb_shinfo(skb)->gso_type = SKB_GSO_TCPV4;
  #endif
  	}
  
  #ifdef HAVE_VLAN_RX_REGISTER
  	igb_receive_skb(q_vector, skb);
  #else
  	napi_gro_receive(&q_vector->napi, skb);
  #endif
  	lrolist->stats.flushed++;
  }
  
  static void igb_lro_flush_all(struct igb_q_vector *q_vector)
  {
  	struct igb_lro_list *lrolist = &q_vector->lrolist;
  	struct sk_buff *skb, *tmp;
  
  	skb_queue_reverse_walk_safe(&lrolist->active, skb, tmp)
  		igb_lro_flush(q_vector, skb);
  }
  
  /*
   * igb_lro_header_ok - Main LRO function.
   **/
  static void igb_lro_header_ok(struct sk_buff *skb)
  {
  	struct igb_lrohdr *lroh = igb_lro_hdr(skb);
  	u16 opt_bytes, data_len;
  
  #ifdef CONFIG_IGB_DISABLE_PACKET_SPLIT
  	IGB_CB(skb)->tail = NULL;
  #endif
  	IGB_CB(skb)->tsecr = 0;
  	IGB_CB(skb)->append_cnt = 0;
  	IGB_CB(skb)->mss = 0;
  
  	/* ensure that the checksum is valid */
  	if (skb->ip_summed != CHECKSUM_UNNECESSARY)
  		return;
  
  	/* If we see CE codepoint in IP header, packet is not mergeable */
  	if (INET_ECN_is_ce(ipv4_get_dsfield(&lroh->iph)))
  		return;
  
  	/* ensure no bits set besides ack or psh */
  	if (lroh->th.fin || lroh->th.syn || lroh->th.rst ||
  	    lroh->th.urg || lroh->th.ece || lroh->th.cwr ||
  	    !lroh->th.ack)
  		return;
  
  	/* store the total packet length */
  	data_len = ntohs(lroh->iph.tot_len);
  
  	/* remove any padding from the end of the skb */
  	__pskb_trim(skb, data_len);
  
  	/* remove header length from data length */
  	data_len -= sizeof(struct igb_lrohdr);
  
  	/*
  	 * check for timestamps. Since the only option we handle are timestamps,
  	 * we only have to handle the simple case of aligned timestamps
  	 */
  	opt_bytes = (lroh->th.doff << 2) - sizeof(struct tcphdr);
  	if (opt_bytes != 0) {
  		if ((opt_bytes != TCPOLEN_TSTAMP_ALIGNED) ||
  		    !pskb_may_pull(skb, sizeof(struct igb_lrohdr) +
  					TCPOLEN_TSTAMP_ALIGNED) ||
  		    (lroh->ts[0] != htonl((TCPOPT_NOP << 24) |
  					     (TCPOPT_NOP << 16) |
  					     (TCPOPT_TIMESTAMP << 8) |
  					      TCPOLEN_TIMESTAMP)) ||
  		    (lroh->ts[2] == 0)) {
  			return;
  		}
  
  		IGB_CB(skb)->tsval = ntohl(lroh->ts[1]);
  		IGB_CB(skb)->tsecr = lroh->ts[2];
  
  		data_len -= TCPOLEN_TSTAMP_ALIGNED;
  	}
  
  	/* record data_len as mss for the packet */
  	IGB_CB(skb)->mss = data_len;
  	IGB_CB(skb)->next_seq = ntohl(lroh->th.seq);
  }
  
  #ifndef CONFIG_IGB_DISABLE_PACKET_SPLIT
  static void igb_merge_frags(struct sk_buff *lro_skb, struct sk_buff *new_skb)
  {
  	struct skb_shared_info *sh_info;
  	struct skb_shared_info *new_skb_info;
  	unsigned int data_len;
  
  	sh_info = skb_shinfo(lro_skb);
  	new_skb_info = skb_shinfo(new_skb);
  
  	/* copy frags into the last skb */
  	memcpy(sh_info->frags + sh_info->nr_frags,
  	       new_skb_info->frags,
  	       new_skb_info->nr_frags * sizeof(skb_frag_t));
  
  	/* copy size data over */
  	sh_info->nr_frags += new_skb_info->nr_frags;
  	data_len = IGB_CB(new_skb)->mss;
  	lro_skb->len += data_len;
  	lro_skb->data_len += data_len;
  	lro_skb->truesize += data_len;
  
  	/* wipe record of data from new_skb */
  	new_skb_info->nr_frags = 0;
  	new_skb->len = new_skb->data_len = 0;
  	dev_kfree_skb_any(new_skb);
  }
  
  #endif /* CONFIG_IGB_DISABLE_PACKET_SPLIT */
  /**
   * igb_lro_receive - if able, queue skb into lro chain
   * @q_vector: structure containing interrupt and ring information
   * @new_skb: pointer to current skb being checked
   *
   * Checks whether the skb given is eligible for LRO and if that's
   * fine chains it to the existing lro_skb based on flowid. If an LRO for
   * the flow doesn't exist create one.
   **/
  static void igb_lro_receive(struct igb_q_vector *q_vector,
  			    struct sk_buff *new_skb)
  {
  	struct sk_buff *lro_skb;
  	struct igb_lro_list *lrolist = &q_vector->lrolist;
  	struct igb_lrohdr *lroh = igb_lro_hdr(new_skb);
  	__be32 saddr = lroh->iph.saddr;
  	__be32 daddr = lroh->iph.daddr;
  	__be32 tcp_ports = *(__be32 *)&lroh->th;
  	u16 data_len;
  #ifdef HAVE_VLAN_RX_REGISTER
  	u16 vid = IGB_CB(new_skb)->vid;
  #else
  	u16 vid = new_skb->vlan_tci;
  #endif
  
  	igb_lro_header_ok(new_skb);
  
  	/*
  	 * we have a packet that might be eligible for LRO,
  	 * so see if it matches anything we might expect
  	 */
  	skb_queue_walk(&lrolist->active, lro_skb) {
  		if (*(__be32 *)&igb_lro_hdr(lro_skb)->th != tcp_ports ||
  		    igb_lro_hdr(lro_skb)->iph.saddr != saddr ||
  		    igb_lro_hdr(lro_skb)->iph.daddr != daddr)
  			continue;
  
  #ifdef HAVE_VLAN_RX_REGISTER
  		if (IGB_CB(lro_skb)->vid != vid)
  #else
  		if (lro_skb->vlan_tci != vid)
  #endif
  			continue;
  
  		/* out of order packet */
  		if (IGB_CB(lro_skb)->next_seq != IGB_CB(new_skb)->next_seq) {
  			igb_lro_flush(q_vector, lro_skb);
  			IGB_CB(new_skb)->mss = 0;
  			break;
  		}
  
  		/* TCP timestamp options have changed */
  		if (!IGB_CB(lro_skb)->tsecr != !IGB_CB(new_skb)->tsecr) {
  			igb_lro_flush(q_vector, lro_skb);
  			break;
  		}
  
  		/* make sure timestamp values are increasing */
  		if (IGB_CB(lro_skb)->tsecr &&
  		    IGB_CB(lro_skb)->tsval > IGB_CB(new_skb)->tsval) {
  			igb_lro_flush(q_vector, lro_skb);
  			IGB_CB(new_skb)->mss = 0;
  			break;
  		}
  
  		data_len = IGB_CB(new_skb)->mss;
  
  		/* Check for all of the above below
  		 *   malformed header
  		 *   no tcp data
  		 *   resultant packet would be too large
  		 *   new skb is larger than our current mss
  		 *   data would remain in header
  		 *   we would consume more frags then the sk_buff contains
  		 *   ack sequence numbers changed
  		 *   window size has changed
  		 */
  		if (data_len == 0 ||
  		    data_len > IGB_CB(lro_skb)->mss ||
  		    data_len > IGB_CB(lro_skb)->free ||
  #ifndef CONFIG_IGB_DISABLE_PACKET_SPLIT
  		    data_len != new_skb->data_len ||
  		    skb_shinfo(new_skb)->nr_frags >=
  		    (MAX_SKB_FRAGS - skb_shinfo(lro_skb)->nr_frags) ||
  #endif
  		    igb_lro_hdr(lro_skb)->th.ack_seq != lroh->th.ack_seq ||
  		    igb_lro_hdr(lro_skb)->th.window != lroh->th.window) {
  			igb_lro_flush(q_vector, lro_skb);
  			break;
  		}
  
  		/* Remove IP and TCP header*/
  		skb_pull(new_skb, new_skb->len - data_len);
  
  		/* update timestamp and timestamp echo response */
  		IGB_CB(lro_skb)->tsval = IGB_CB(new_skb)->tsval;
  		IGB_CB(lro_skb)->tsecr = IGB_CB(new_skb)->tsecr;
  
  		/* update sequence and free space */
  		IGB_CB(lro_skb)->next_seq += data_len;
  		IGB_CB(lro_skb)->free -= data_len;
  
  		/* update append_cnt */
  		IGB_CB(lro_skb)->append_cnt++;
  
  #ifndef CONFIG_IGB_DISABLE_PACKET_SPLIT
  		/* if header is empty pull pages into current skb */
  		igb_merge_frags(lro_skb, new_skb);
  #else
  		/* chain this new skb in frag_list */
  		igb_add_active_tail(lro_skb, new_skb);
  #endif
  
  		if ((data_len < IGB_CB(lro_skb)->mss) || lroh->th.psh ||
  		    skb_shinfo(lro_skb)->nr_frags == MAX_SKB_FRAGS) {
  			igb_lro_hdr(lro_skb)->th.psh |= lroh->th.psh;
  			igb_lro_flush(q_vector, lro_skb);
  		}
  
  		lrolist->stats.coal++;
  		return;
  	}
  
  	if (IGB_CB(new_skb)->mss && !lroh->th.psh) {
  		/* if we are at capacity flush the tail */
  		if (skb_queue_len(&lrolist->active) >= IGB_LRO_MAX) {
  			lro_skb = skb_peek_tail(&lrolist->active);
  			if (lro_skb)
  				igb_lro_flush(q_vector, lro_skb);
  		}
  
  		/* update sequence and free space */
  		IGB_CB(new_skb)->next_seq += IGB_CB(new_skb)->mss;
  		IGB_CB(new_skb)->free = 65521 - new_skb->len;
  
  		/* .. and insert at the front of the active list */
  		__skb_queue_head(&lrolist->active, new_skb);
  
  		lrolist->stats.coal++;
  		return;
  	}
  
  	/* packet not handled by any of the above, pass it to the stack */
  #ifdef HAVE_VLAN_RX_REGISTER
  	igb_receive_skb(q_vector, new_skb);
  #else
  	napi_gro_receive(&q_vector->napi, new_skb);
  #endif
  }
  
  #endif /* IGB_NO_LRO */
  /**
   * igb_process_skb_fields - Populate skb header fields from Rx descriptor
   * @rx_ring: rx descriptor ring packet is being transacted on
   * @rx_desc: pointer to the EOP Rx descriptor
   * @skb: pointer to current skb being populated
   *
   * This function checks the ring, descriptor, and packet information in
   * order to populate the hash, checksum, VLAN, timestamp, protocol, and
   * other fields within the skb.
   **/
  static void igb_process_skb_fields(struct igb_ring *rx_ring,
  				   union e1000_adv_rx_desc *rx_desc,
  				   struct sk_buff *skb)
  {
  	struct net_device *dev = rx_ring->netdev;
  	__le16 pkt_info = rx_desc->wb.lower.lo_dword.hs_rss.pkt_info;
  
  #ifdef NETIF_F_RXHASH
  	igb_rx_hash(rx_ring, rx_desc, skb);
  
  #endif
  	igb_rx_checksum(rx_ring, rx_desc, skb);
  
      /* update packet type stats */
  	if (pkt_info & cpu_to_le16(E1000_RXDADV_PKTTYPE_IPV4))
  		rx_ring->rx_stats.ipv4_packets++;
  	else if (pkt_info & cpu_to_le16(E1000_RXDADV_PKTTYPE_IPV4_EX))
  		rx_ring->rx_stats.ipv4e_packets++;
  	else if (pkt_info & cpu_to_le16(E1000_RXDADV_PKTTYPE_IPV6))
  		rx_ring->rx_stats.ipv6_packets++;
  	else if (pkt_info & cpu_to_le16(E1000_RXDADV_PKTTYPE_IPV6_EX))
  		rx_ring->rx_stats.ipv6e_packets++;
  	else if (pkt_info & cpu_to_le16(E1000_RXDADV_PKTTYPE_TCP))
  		rx_ring->rx_stats.tcp_packets++;
  	else if (pkt_info & cpu_to_le16(E1000_RXDADV_PKTTYPE_UDP))
  		rx_ring->rx_stats.udp_packets++;
  	else if (pkt_info & cpu_to_le16(E1000_RXDADV_PKTTYPE_SCTP))
  		rx_ring->rx_stats.sctp_packets++;
  	else if (pkt_info & cpu_to_le16(E1000_RXDADV_PKTTYPE_NFS))
  		rx_ring->rx_stats.nfs_packets++;
  
  #ifdef HAVE_PTP_1588_CLOCK
  	igb_ptp_rx_hwtstamp(rx_ring, rx_desc, skb);
  #endif /* HAVE_PTP_1588_CLOCK */
  
  #ifdef NETIF_F_HW_VLAN_CTAG_RX
  	if ((dev->features & NETIF_F_HW_VLAN_CTAG_RX) &&
  #else
  	if ((dev->features & NETIF_F_HW_VLAN_RX) &&
  #endif
  	    igb_test_staterr(rx_desc, E1000_RXD_STAT_VP)) {
  		u16 vid = 0;
  		if (igb_test_staterr(rx_desc, E1000_RXDEXT_STATERR_LB) &&
  		    test_bit(IGB_RING_FLAG_RX_LB_VLAN_BSWAP, &rx_ring->flags))
  			vid = be16_to_cpu(rx_desc->wb.upper.vlan);
  		else
  			vid = le16_to_cpu(rx_desc->wb.upper.vlan);
  #ifdef HAVE_VLAN_RX_REGISTER
  		IGB_CB(skb)->vid = vid;
  	} else {
  		IGB_CB(skb)->vid = 0;
  #else
  
  #ifdef HAVE_VLAN_PROTOCOL
  		__vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid);
  #else
  		__vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid);
  #endif
  
  
  #endif
  	}
  
  	skb_record_rx_queue(skb, rx_ring->queue_index);
  
  	skb->protocol = eth_type_trans(skb, dev);
  }
  
  /**
   * igb_is_non_eop - process handling of non-EOP buffers
   * @rx_ring: Rx ring being processed
   * @rx_desc: Rx descriptor for current buffer
   *
   * This function updates next to clean.  If the buffer is an EOP buffer
   * this function exits returning false, otherwise it will place the
   * sk_buff in the next buffer to be chained and return true indicating
   * that this is in fact a non-EOP buffer.
   **/
  static bool igb_is_non_eop(struct igb_ring *rx_ring,
  			   union e1000_adv_rx_desc *rx_desc)
  {
  	u32 ntc = rx_ring->next_to_clean + 1;
  
  	/* fetch, update, and store next to clean */
  	ntc = (ntc < rx_ring->count) ? ntc : 0;
  	rx_ring->next_to_clean = ntc;
  
  	prefetch(IGB_RX_DESC(rx_ring, ntc));
  
  	if (likely(igb_test_staterr(rx_desc, E1000_RXD_STAT_EOP)))
  		return false;
  
  	return true;
  }
  
  #ifdef CONFIG_IGB_DISABLE_PACKET_SPLIT
  /* igb_clean_rx_irq -- * legacy */
  static bool igb_clean_rx_irq(struct igb_q_vector *q_vector, int budget)
  {
  	struct igb_ring *rx_ring = q_vector->rx.ring;
  	unsigned int total_bytes = 0, total_packets = 0;
  	u16 cleaned_count = igb_desc_unused(rx_ring);
  
  	do {
  		struct igb_rx_buffer *rx_buffer;
  		union e1000_adv_rx_desc *rx_desc;
  		struct sk_buff *skb;
  		u16 ntc;
  
  		/* return some buffers to hardware, one at a time is too slow */
  		if (cleaned_count >= IGB_RX_BUFFER_WRITE) {
  			igb_alloc_rx_buffers(rx_ring, cleaned_count);
  			cleaned_count = 0;
  		}
  
  		ntc = rx_ring->next_to_clean;
  		rx_desc = IGB_RX_DESC(rx_ring, ntc);
  		rx_buffer = &rx_ring->rx_buffer_info[ntc];
  
  		if (!igb_test_staterr(rx_desc, E1000_RXD_STAT_DD))
  			break;
  
  		/*
  		 * This memory barrier is needed to keep us from reading
  		 * any other fields out of the rx_desc until we know the
  		 * RXD_STAT_DD bit is set
  		 */
  		rmb();
  
  		skb = rx_buffer->skb;
  
  		prefetch(skb->data);
  
  		/* pull the header of the skb in */
  		__skb_put(skb, le16_to_cpu(rx_desc->wb.upper.length));
  
  		/* clear skb reference in buffer info structure */
  		rx_buffer->skb = NULL;
  
  		cleaned_count++;
  
  		BUG_ON(igb_is_non_eop(rx_ring, rx_desc));
  
  		dma_unmap_single(rx_ring->dev, rx_buffer->dma,
  				 rx_ring->rx_buffer_len,
  				 DMA_FROM_DEVICE);
  		rx_buffer->dma = 0;
  
  		if (igb_test_staterr(rx_desc,
  				     E1000_RXDEXT_ERR_FRAME_ERR_MASK)) {
  			dev_kfree_skb_any(skb);
  			continue;
  		}
  
  		total_bytes += skb->len;
  
  		/* populate checksum, timestamp, VLAN, and protocol */
  		igb_process_skb_fields(rx_ring, rx_desc, skb);
  
  #ifndef IGB_NO_LRO
  		if (igb_can_lro(rx_ring, rx_desc, skb))
  			igb_lro_receive(q_vector, skb);
  		else
  #endif
  #ifdef HAVE_VLAN_RX_REGISTER
  			igb_receive_skb(q_vector, skb);
  #else
  			napi_gro_receive(&q_vector->napi, skb);
  #endif
  
  #ifndef NETIF_F_GRO
  		netdev_ring(rx_ring)->last_rx = jiffies;
  
  #endif
  		/* update budget accounting */
  		total_packets++;
  	} while (likely(total_packets < budget));
  
  	rx_ring->rx_stats.packets += total_packets;
  	rx_ring->rx_stats.bytes += total_bytes;
  	q_vector->rx.total_packets += total_packets;
  	q_vector->rx.total_bytes += total_bytes;
  
  	if (cleaned_count)
  		igb_alloc_rx_buffers(rx_ring, cleaned_count);
  
  #ifndef IGB_NO_LRO
  	igb_lro_flush_all(q_vector);
  
  #endif /* IGB_NO_LRO */
  	return total_packets < budget;
  }
  #else /* CONFIG_IGB_DISABLE_PACKET_SPLIT */
  /**
   * igb_get_headlen - determine size of header for LRO/GRO
   * @data: pointer to the start of the headers
   * @max_len: total length of section to find headers in
   *
   * This function is meant to determine the length of headers that will
   * be recognized by hardware for LRO, and GRO offloads.  The main
   * motivation of doing this is to only perform one pull for IPv4 TCP
   * packets so that we can do basic things like calculating the gso_size
   * based on the average data per packet.
   **/
  static unsigned int igb_get_headlen(unsigned char *data,
  				    unsigned int max_len)
  {
  	union {
  		unsigned char *network;
  		/* l2 headers */
  		struct ethhdr *eth;
  		struct vlan_hdr *vlan;
  		/* l3 headers */
  		struct iphdr *ipv4;
  		struct ipv6hdr *ipv6;
  	} hdr;
  	__be16 protocol;
  	u8 nexthdr = 0;	/* default to not TCP */
  	u8 hlen;
  
  	/* this should never happen, but better safe than sorry */
  	if (max_len < ETH_HLEN)
  		return max_len;
  
  	/* initialize network frame pointer */
  	hdr.network = data;
  
  	/* set first protocol and move network header forward */
  	protocol = hdr.eth->h_proto;
  	hdr.network += ETH_HLEN;
  
  	/* handle any vlan tag if present */
  	if (protocol == __constant_htons(ETH_P_8021Q)) {
  		if ((hdr.network - data) > (max_len - VLAN_HLEN))
  			return max_len;
  
  		protocol = hdr.vlan->h_vlan_encapsulated_proto;
  		hdr.network += VLAN_HLEN;
  	}
  
  	/* handle L3 protocols */
  	if (protocol == __constant_htons(ETH_P_IP)) {
  		if ((hdr.network - data) > (max_len - sizeof(struct iphdr)))
  			return max_len;
  
  		/* access ihl as a u8 to avoid unaligned access on ia64 */
  		hlen = (hdr.network[0] & 0x0F) << 2;
  
  		/* verify hlen meets minimum size requirements */
  		if (hlen < sizeof(struct iphdr))
  			return hdr.network - data;
  
  		/* record next protocol if header is present */
  		if (!(hdr.ipv4->frag_off & htons(IP_OFFSET)))
  			nexthdr = hdr.ipv4->protocol;
  #ifdef NETIF_F_TSO6
  	} else if (protocol == __constant_htons(ETH_P_IPV6)) {
  		if ((hdr.network - data) > (max_len - sizeof(struct ipv6hdr)))
  			return max_len;
  
  		/* record next protocol */
  		nexthdr = hdr.ipv6->nexthdr;
  		hlen = sizeof(struct ipv6hdr);
  #endif /* NETIF_F_TSO6 */
  	} else {
  		return hdr.network - data;
  	}
  
  	/* relocate pointer to start of L4 header */
  	hdr.network += hlen;
  
  	/* finally sort out TCP */
  	if (nexthdr == IPPROTO_TCP) {
  		if ((hdr.network - data) > (max_len - sizeof(struct tcphdr)))
  			return max_len;
  
  		/* access doff as a u8 to avoid unaligned access on ia64 */
  		hlen = (hdr.network[12] & 0xF0) >> 2;
  
  		/* verify hlen meets minimum size requirements */
  		if (hlen < sizeof(struct tcphdr))
  			return hdr.network - data;
  
  		hdr.network += hlen;
  	} else if (nexthdr == IPPROTO_UDP) {
  		if ((hdr.network - data) > (max_len - sizeof(struct udphdr)))
  			return max_len;
  
  		hdr.network += sizeof(struct udphdr);
  	}
  
  	/*
  	 * If everything has gone correctly hdr.network should be the
  	 * data section of the packet and will be the end of the header.
  	 * If not then it probably represents the end of the last recognized
  	 * header.
  	 */
  	if ((hdr.network - data) < max_len)
  		return hdr.network - data;
  	else
  		return max_len;
  }
  
  /**
   * igb_pull_tail - igb specific version of skb_pull_tail
   * @rx_ring: rx descriptor ring packet is being transacted on
   * @rx_desc: pointer to the EOP Rx descriptor
   * @skb: pointer to current skb being adjusted
   *
   * This function is an igb specific version of __pskb_pull_tail.  The
   * main difference between this version and the original function is that
   * this function can make several assumptions about the state of things
   * that allow for significant optimizations versus the standard function.
   * As a result we can do things like drop a frag and maintain an accurate
   * truesize for the skb.
   */
  static void igb_pull_tail(struct igb_ring *rx_ring,
  			  union e1000_adv_rx_desc *rx_desc,
  			  struct sk_buff *skb)
  {
  	struct skb_frag_struct *frag = &skb_shinfo(skb)->frags[0];
  	unsigned char *va;
  	unsigned int pull_len;
  
  	/*
  	 * it is valid to use page_address instead of kmap since we are
  	 * working with pages allocated out of the lomem pool per
  	 * alloc_page(GFP_ATOMIC)
  	 */
  	va = skb_frag_address(frag);
  
  #ifdef HAVE_PTP_1588_CLOCK
  	if (igb_test_staterr(rx_desc, E1000_RXDADV_STAT_TSIP)) {
  		/* retrieve timestamp from buffer */
  		igb_ptp_rx_pktstamp(rx_ring->q_vector, va, skb);
  
  		/* update pointers to remove timestamp header */
  		skb_frag_size_sub(frag, IGB_TS_HDR_LEN);
  		frag->page_offset += IGB_TS_HDR_LEN;
  		skb->data_len -= IGB_TS_HDR_LEN;
  		skb->len -= IGB_TS_HDR_LEN;
  
  		/* move va to start of packet data */
  		va += IGB_TS_HDR_LEN;
  	}
  #endif /* HAVE_PTP_1588_CLOCK */
  
  	/*
  	 * we need the header to contain the greater of either ETH_HLEN or
  	 * 60 bytes if the skb->len is less than 60 for skb_pad.
  	 */
  	pull_len = igb_get_headlen(va, IGB_RX_HDR_LEN);
  
  	/* align pull length to size of long to optimize memcpy performance */
  	skb_copy_to_linear_data(skb, va, ALIGN(pull_len, sizeof(long)));
  
  	/* update all of the pointers */
  	skb_frag_size_sub(frag, pull_len);
  	frag->page_offset += pull_len;
  	skb->data_len -= pull_len;
  	skb->tail += pull_len;
  }
  
  /**
   * igb_cleanup_headers - Correct corrupted or empty headers
   * @rx_ring: rx descriptor ring packet is being transacted on
   * @rx_desc: pointer to the EOP Rx descriptor
   * @skb: pointer to current skb being fixed
   *
   * Address the case where we are pulling data in on pages only
   * and as such no data is present in the skb header.
   *
   * In addition if skb is not at least 60 bytes we need to pad it so that
   * it is large enough to qualify as a valid Ethernet frame.
   *
   * Returns true if an error was encountered and skb was freed.
   **/
  static bool igb_cleanup_headers(struct igb_ring *rx_ring,
  				union e1000_adv_rx_desc *rx_desc,
  				struct sk_buff *skb)
  {
  
  	if (unlikely((igb_test_staterr(rx_desc,
  				       E1000_RXDEXT_ERR_FRAME_ERR_MASK)))) {
  		struct net_device *netdev = rx_ring->netdev;
  		if (!(netdev->features & NETIF_F_RXALL)) {
  			dev_kfree_skb_any(skb);
  			return true;
  		}
  	}
  
  	/* place header in linear portion of buffer */
  	if (skb_is_nonlinear(skb))
  		igb_pull_tail(rx_ring, rx_desc, skb);
  
  	/* if skb_pad returns an error the skb was freed */
  	if (unlikely(skb->len < 60)) {
  		int pad_len = 60 - skb->len;
  
  		if (skb_pad(skb, pad_len))
  			return true;
  		__skb_put(skb, pad_len);
  	}
  
  	return false;
  }
  
  /* igb_clean_rx_irq -- * packet split */
  static bool igb_clean_rx_irq(struct igb_q_vector *q_vector, int budget)
  {
  	struct igb_ring *rx_ring = q_vector->rx.ring;
  	struct sk_buff *skb = rx_ring->skb;
  	unsigned int total_bytes = 0, total_packets = 0;
  	u16 cleaned_count = igb_desc_unused(rx_ring);
  
  	do {
  		union e1000_adv_rx_desc *rx_desc;
  
  		/* return some buffers to hardware, one at a time is too slow */
  		if (cleaned_count >= IGB_RX_BUFFER_WRITE) {
  			igb_alloc_rx_buffers(rx_ring, cleaned_count);
  			cleaned_count = 0;
  		}
  
  		rx_desc = IGB_RX_DESC(rx_ring, rx_ring->next_to_clean);
  
  		if (!igb_test_staterr(rx_desc, E1000_RXD_STAT_DD))
  			break;
  
  		/*
  		 * This memory barrier is needed to keep us from reading
  		 * any other fields out of the rx_desc until we know the
  		 * RXD_STAT_DD bit is set
  		 */
  		rmb();
  
  		/* retrieve a buffer from the ring */
  		skb = igb_fetch_rx_buffer(rx_ring, rx_desc, skb);
  
  		/* exit if we failed to retrieve a buffer */
  		if (!skb)
  			break;
  
  		cleaned_count++;
  
  		/* fetch next buffer in frame if non-eop */
  		if (igb_is_non_eop(rx_ring, rx_desc))
  			continue;
  
  		/* verify the packet layout is correct */
  		if (igb_cleanup_headers(rx_ring, rx_desc, skb)) {
  			skb = NULL;
  			continue;
  		}
  
  		/* probably a little skewed due to removing CRC */
  		total_bytes += skb->len;
  
  		/* populate checksum, timestamp, VLAN, and protocol */
  		igb_process_skb_fields(rx_ring, rx_desc, skb);
  
  #ifndef IGB_NO_LRO
  		if (igb_can_lro(rx_ring, rx_desc, skb))
  			igb_lro_receive(q_vector, skb);
  		else
  #endif
  #ifdef HAVE_VLAN_RX_REGISTER
  			igb_receive_skb(q_vector, skb);
  #else
  			napi_gro_receive(&q_vector->napi, skb);
  #endif
  #ifndef NETIF_F_GRO
  
  		netdev_ring(rx_ring)->last_rx = jiffies;
  #endif
  
  		/* reset skb pointer */
  		skb = NULL;
  
  		/* update budget accounting */
  		total_packets++;
  	} while (likely(total_packets < budget));
  
  	/* place incomplete frames back on ring for completion */
  	rx_ring->skb = skb;
  
  	rx_ring->rx_stats.packets += total_packets;
  	rx_ring->rx_stats.bytes += total_bytes;
  	q_vector->rx.total_packets += total_packets;
  	q_vector->rx.total_bytes += total_bytes;
  
  	if (cleaned_count)
  		igb_alloc_rx_buffers(rx_ring, cleaned_count);
  
  #ifndef IGB_NO_LRO
  	igb_lro_flush_all(q_vector);
  
  #endif /* IGB_NO_LRO */
  	return total_packets < budget;
  }
  #endif /* CONFIG_IGB_DISABLE_PACKET_SPLIT */
  
  #ifdef CONFIG_IGB_DISABLE_PACKET_SPLIT
  static bool igb_alloc_mapped_skb(struct igb_ring *rx_ring,
  				 struct igb_rx_buffer *bi)
  {
  	struct sk_buff *skb = bi->skb;
  	dma_addr_t dma = bi->dma;
  
  	if (dma)
  		return true;
  
  	if (likely(!skb)) {
  		skb = netdev_alloc_skb_ip_align(netdev_ring(rx_ring),
  						rx_ring->rx_buffer_len);
  		bi->skb = skb;
  		if (!skb) {
  			rx_ring->rx_stats.alloc_failed++;
  			return false;
  		}
  
  		/* initialize skb for ring */
  		skb_record_rx_queue(skb, ring_queue_index(rx_ring));
  	}
  
  	dma = dma_map_single(rx_ring->dev, skb->data,
  			     rx_ring->rx_buffer_len, DMA_FROM_DEVICE);
  
  	/* if mapping failed free memory back to system since
  	 * there isn't much point in holding memory we can't use
  	 */
  	if (dma_mapping_error(rx_ring->dev, dma)) {
  		dev_kfree_skb_any(skb);
  		bi->skb = NULL;
  
  		rx_ring->rx_stats.alloc_failed++;
  		return false;
  	}
  
  	bi->dma = dma;
  	return true;
  }
  
  #else /* CONFIG_IGB_DISABLE_PACKET_SPLIT */
  static bool igb_alloc_mapped_page(struct igb_ring *rx_ring,
  				  struct igb_rx_buffer *bi)
  {
  	struct page *page = bi->page;
  	dma_addr_t dma;
  
  	/* since we are recycling buffers we should seldom need to alloc */
  	if (likely(page))
  		return true;
  
  	/* alloc new page for storage */
  	page = alloc_page(GFP_ATOMIC | __GFP_COLD);
  	if (unlikely(!page)) {
  		rx_ring->rx_stats.alloc_failed++;
  		return false;
  	}
  
  	/* map page for use */
  	dma = dma_map_page(rx_ring->dev, page, 0, PAGE_SIZE, DMA_FROM_DEVICE);
  
  	/*
  	 * if mapping failed free memory back to system since
  	 * there isn't much point in holding memory we can't use
  	 */
  	if (dma_mapping_error(rx_ring->dev, dma)) {
  		__free_page(page);
  
  		rx_ring->rx_stats.alloc_failed++;
  		return false;
  	}
  
  	bi->dma = dma;
  	bi->page = page;
  	bi->page_offset = 0;
  
  	return true;
  }
  
  #endif /* CONFIG_IGB_DISABLE_PACKET_SPLIT */
  /**
   * igb_alloc_rx_buffers - Replace used receive buffers; packet split
   * @adapter: address of board private structure
   **/
  void igb_alloc_rx_buffers(struct igb_ring *rx_ring, u16 cleaned_count)
  {
  	union e1000_adv_rx_desc *rx_desc;
  	struct igb_rx_buffer *bi;
  	u16 i = rx_ring->next_to_use;
  
  	/* nothing to do */
  	if (!cleaned_count)
  		return;
  
  	rx_desc = IGB_RX_DESC(rx_ring, i);
  	bi = &rx_ring->rx_buffer_info[i];
  	i -= rx_ring->count;
  
  	do {
  #ifdef CONFIG_IGB_DISABLE_PACKET_SPLIT
  		if (!igb_alloc_mapped_skb(rx_ring, bi))
  #else
  		if (!igb_alloc_mapped_page(rx_ring, bi))
  #endif /* CONFIG_IGB_DISABLE_PACKET_SPLIT */
  			break;
  
  		/*
  		 * Refresh the desc even if buffer_addrs didn't change
  		 * because each write-back erases this info.
  		 */
  #ifdef CONFIG_IGB_DISABLE_PACKET_SPLIT
  		rx_desc->read.pkt_addr = cpu_to_le64(bi->dma);
  #else
  		rx_desc->read.pkt_addr = cpu_to_le64(bi->dma + bi->page_offset);
  #endif
  
  		rx_desc++;
  		bi++;
  		i++;
  		if (unlikely(!i)) {
  			rx_desc = IGB_RX_DESC(rx_ring, 0);
  			bi = rx_ring->rx_buffer_info;
  			i -= rx_ring->count;
  		}
  
  		/* clear the hdr_addr for the next_to_use descriptor */
  		rx_desc->read.hdr_addr = 0;
  
  		cleaned_count--;
  	} while (cleaned_count);
  
  	i += rx_ring->count;
  
  	if (rx_ring->next_to_use != i) {
  		/* record the next descriptor to use */
  		rx_ring->next_to_use = i;
  
  #ifndef CONFIG_IGB_DISABLE_PACKET_SPLIT
  		/* update next to alloc since we have filled the ring */
  		rx_ring->next_to_alloc = i;
  
  #endif
  		/*
  		 * 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();
  		writel(i, rx_ring->tail);
  	}
  }
  
  #ifdef SIOCGMIIPHY
  /**
   * igb_mii_ioctl -
   * @netdev:
   * @ifreq:
   * @cmd:
   **/
  static int igb_mii_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
  {
  	struct igb_adapter *adapter = netdev_priv(netdev);
  	struct mii_ioctl_data *data = if_mii(ifr);
  
  	if (adapter->hw.phy.media_type != e1000_media_type_copper)
  		return -EOPNOTSUPP;
  
  	switch (cmd) {
  	case SIOCGMIIPHY:
  		data->phy_id = adapter->hw.phy.addr;
  		break;
  	case SIOCGMIIREG:
  		if (!capable(CAP_NET_ADMIN))
  			return -EPERM;
  		if (e1000_read_phy_reg(&adapter->hw, data->reg_num & 0x1F,
  				   &data->val_out))
  			return -EIO;
  		break;
  	case SIOCSMIIREG:
  	default:
  		return -EOPNOTSUPP;
  	}
  	return E1000_SUCCESS;
  }
  
  #endif
  /**
   * igb_ioctl -
   * @netdev:
   * @ifreq:
   * @cmd:
   **/
  static int igb_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
  {
  	switch (cmd) {
  #ifdef SIOCGMIIPHY
  	case SIOCGMIIPHY:
  	case SIOCGMIIREG:
  	case SIOCSMIIREG:
  		return igb_mii_ioctl(netdev, ifr, cmd);
  #endif
  #ifdef HAVE_PTP_1588_CLOCK
  	case SIOCSHWTSTAMP:
  		return igb_ptp_hwtstamp_ioctl(netdev, ifr, cmd);
  #endif /* HAVE_PTP_1588_CLOCK */
  #ifdef ETHTOOL_OPS_COMPAT
  	case SIOCETHTOOL:
  		return ethtool_ioctl(ifr);
  #endif
  	default:
  		return -EOPNOTSUPP;
  	}
  }
  
  s32 e1000_read_pcie_cap_reg(struct e1000_hw *hw, u32 reg, u16 *value)
  {
  	struct igb_adapter *adapter = hw->back;
  	u16 cap_offset;
  
  	cap_offset = pci_find_capability(adapter->pdev, PCI_CAP_ID_EXP);
  	if (!cap_offset)
  		return -E1000_ERR_CONFIG;
  
  	pci_read_config_word(adapter->pdev, cap_offset + reg, value);
  
  	return E1000_SUCCESS;
  }
  
  s32 e1000_write_pcie_cap_reg(struct e1000_hw *hw, u32 reg, u16 *value)
  {
  	struct igb_adapter *adapter = hw->back;
  	u16 cap_offset;
  
  	cap_offset = pci_find_capability(adapter->pdev, PCI_CAP_ID_EXP);
  	if (!cap_offset)
  		return -E1000_ERR_CONFIG;
  
  	pci_write_config_word(adapter->pdev, cap_offset + reg, *value);
  
  	return E1000_SUCCESS;
  }
  
  #ifdef HAVE_VLAN_RX_REGISTER
  static void igb_vlan_mode(struct net_device *netdev, struct vlan_group *vlgrp)
  #else
  void igb_vlan_mode(struct net_device *netdev, u32 features)
  #endif
  {
  	struct igb_adapter *adapter = netdev_priv(netdev);
  	struct e1000_hw *hw = &adapter->hw;
  	u32 ctrl, rctl;
  	int i;
  #ifdef HAVE_VLAN_RX_REGISTER
  	bool enable = !!vlgrp;
  
  	igb_irq_disable(adapter);
  
  	adapter->vlgrp = vlgrp;
  
  	if (!test_bit(__IGB_DOWN, &adapter->state))
  		igb_irq_enable(adapter);
  #else
  #ifdef NETIF_F_HW_VLAN_CTAG_RX
  	bool enable = !!(features & NETIF_F_HW_VLAN_CTAG_RX);
  #else
  	bool enable = !!(features & NETIF_F_HW_VLAN_RX);
  #endif
  #endif
  
  	if (enable) {
  		/* enable VLAN tag insert/strip */
  		ctrl = E1000_READ_REG(hw, E1000_CTRL);
  		ctrl |= E1000_CTRL_VME;
  		E1000_WRITE_REG(hw, E1000_CTRL, ctrl);
  
  		/* Disable CFI check */
  		rctl = E1000_READ_REG(hw, E1000_RCTL);
  		rctl &= ~E1000_RCTL_CFIEN;
  		E1000_WRITE_REG(hw, E1000_RCTL, rctl);
  	} else {
  		/* disable VLAN tag insert/strip */
  		ctrl = E1000_READ_REG(hw, E1000_CTRL);
  		ctrl &= ~E1000_CTRL_VME;
  		E1000_WRITE_REG(hw, E1000_CTRL, ctrl);
  	}
  
  #ifndef CONFIG_IGB_VMDQ_NETDEV
  	for (i = 0; i < adapter->vmdq_pools; i++) {
  		igb_set_vf_vlan_strip(adapter,
  				      adapter->vfs_allocated_count + i,
  				      enable);
  	}
  
  #else
  	igb_set_vf_vlan_strip(adapter,
  			      adapter->vfs_allocated_count,
  			      enable);
  
  	for (i = 1; i < adapter->vmdq_pools; i++) {
  #ifdef HAVE_VLAN_RX_REGISTER
  		struct igb_vmdq_adapter *vadapter;
  		vadapter = netdev_priv(adapter->vmdq_netdev[i-1]);
  		enable = !!vadapter->vlgrp;
  #else
  		struct net_device *vnetdev;
  		vnetdev = adapter->vmdq_netdev[i-1];
  #ifdef NETIF_F_HW_VLAN_CTAG_RX
  		enable = !!(vnetdev->features & NETIF_F_HW_VLAN_CTAG_RX);
  #else
  		enable = !!(vnetdev->features & NETIF_F_HW_VLAN_RX);
  #endif
  #endif
  		igb_set_vf_vlan_strip(adapter,
  				      adapter->vfs_allocated_count + i,
  				      enable);
  	}
  
  #endif
  	igb_rlpml_set(adapter);
  }
  
  #ifdef HAVE_VLAN_PROTOCOL
  static int igb_vlan_rx_add_vid(struct net_device *netdev, __be16 proto, u16 vid)
  #elif defined HAVE_INT_NDO_VLAN_RX_ADD_VID
  #ifdef NETIF_F_HW_VLAN_CTAG_RX
  static int igb_vlan_rx_add_vid(struct net_device *netdev,
  			       __always_unused __be16 proto, u16 vid)
  #else
  static int igb_vlan_rx_add_vid(struct net_device *netdev, u16 vid)
  #endif
  #else
  static void igb_vlan_rx_add_vid(struct net_device *netdev, u16 vid)
  #endif
  {
  	struct igb_adapter *adapter = netdev_priv(netdev);
  	int pf_id = adapter->vfs_allocated_count;
  
  	/* attempt to add filter to vlvf array */
  	igb_vlvf_set(adapter, vid, TRUE, pf_id);
  
  	/* add the filter since PF can receive vlans w/o entry in vlvf */
  	igb_vfta_set(adapter, vid, TRUE);
  #ifndef HAVE_NETDEV_VLAN_FEATURES
  
  	/* Copy feature flags from netdev to the vlan netdev for this vid.
  	 * This allows things like TSO to bubble down to our vlan device.
  	 * There is no need to update netdev for vlan 0 (DCB), since it
  	 * wouldn't has v_netdev.
  	 */
  	if (adapter->vlgrp) {
  		struct vlan_group *vlgrp = adapter->vlgrp;
  		struct net_device *v_netdev = vlan_group_get_device(vlgrp, vid);
  		if (v_netdev) {
  			v_netdev->features |= netdev->features;
  			vlan_group_set_device(vlgrp, vid, v_netdev);
  		}
  	}
  #endif
  #ifndef HAVE_VLAN_RX_REGISTER
  
  	set_bit(vid, adapter->active_vlans);
  #endif
  #ifdef HAVE_INT_NDO_VLAN_RX_ADD_VID
  	return 0;
  #endif
  }
  
  #ifdef HAVE_VLAN_PROTOCOL
  static int igb_vlan_rx_kill_vid(struct net_device *netdev, __be16 proto, u16 vid)
  #elif defined HAVE_INT_NDO_VLAN_RX_ADD_VID
  #ifdef NETIF_F_HW_VLAN_CTAG_RX
  static int igb_vlan_rx_kill_vid(struct net_device *netdev,
  				__always_unused __be16 proto, u16 vid)
  #else
  static int igb_vlan_rx_kill_vid(struct net_device *netdev, u16 vid)
  #endif
  #else
  static void igb_vlan_rx_kill_vid(struct net_device *netdev, u16 vid)
  #endif
  {
  	struct igb_adapter *adapter = netdev_priv(netdev);
  	int pf_id = adapter->vfs_allocated_count;
  	s32 err;
  
  #ifdef HAVE_VLAN_RX_REGISTER
  	igb_irq_disable(adapter);
  
  	vlan_group_set_device(adapter->vlgrp, vid, NULL);
  
  	if (!test_bit(__IGB_DOWN, &adapter->state))
  		igb_irq_enable(adapter);
  
  #endif /* HAVE_VLAN_RX_REGISTER */
  	/* remove vlan from VLVF table array */
  	err = igb_vlvf_set(adapter, vid, FALSE, pf_id);
  
  	/* if vid was not present in VLVF just remove it from table */
  	if (err)
  		igb_vfta_set(adapter, vid, FALSE);
  #ifndef HAVE_VLAN_RX_REGISTER
  
  	clear_bit(vid, adapter->active_vlans);
  #endif
  #ifdef HAVE_INT_NDO_VLAN_RX_ADD_VID
  	return 0;
  #endif
  }
  
  static void igb_restore_vlan(struct igb_adapter *adapter)
  {
  #ifdef HAVE_VLAN_RX_REGISTER
  	igb_vlan_mode(adapter->netdev, adapter->vlgrp);
  
  	if (adapter->vlgrp) {
  		u16 vid;
  		for (vid = 0; vid < VLAN_N_VID; vid++) {
  			if (!vlan_group_get_device(adapter->vlgrp, vid))
  				continue;
  #ifdef NETIF_F_HW_VLAN_CTAG_RX
  			igb_vlan_rx_add_vid(adapter->netdev,
  					    htons(ETH_P_8021Q), vid);
  #else
  			igb_vlan_rx_add_vid(adapter->netdev, vid);
  #endif
  		}
  	}
  #else
  	u16 vid;
  
  	igb_vlan_mode(adapter->netdev, adapter->netdev->features);
  
  	for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID)
  #ifdef NETIF_F_HW_VLAN_CTAG_RX
  		igb_vlan_rx_add_vid(adapter->netdev,
  				    htons(ETH_P_8021Q), vid);
  #else
  		igb_vlan_rx_add_vid(adapter->netdev, vid);
  #endif
  #endif
  }
  
  int igb_set_spd_dplx(struct igb_adapter *adapter, u16 spddplx)
  {
  	struct pci_dev *pdev = adapter->pdev;
  	struct e1000_mac_info *mac = &adapter->hw.mac;
  
  	mac->autoneg = 0;
  
  	/* SerDes device's does not support 10Mbps Full/duplex
  	 * and 100Mbps Half duplex
  	 */
  	if (adapter->hw.phy.media_type == e1000_media_type_internal_serdes) {
  		switch (spddplx) {
  		case SPEED_10 + DUPLEX_HALF:
  		case SPEED_10 + DUPLEX_FULL:
  		case SPEED_100 + DUPLEX_HALF:
  			dev_err(pci_dev_to_dev(pdev),
  				"Unsupported Speed/Duplex configuration\n");
  			return -EINVAL;
  		default:
  			break;
  		}
  	}
  
  	switch (spddplx) {
  	case SPEED_10 + DUPLEX_HALF:
  		mac->forced_speed_duplex = ADVERTISE_10_HALF;
  		break;
  	case SPEED_10 + DUPLEX_FULL:
  		mac->forced_speed_duplex = ADVERTISE_10_FULL;
  		break;
  	case SPEED_100 + DUPLEX_HALF:
  		mac->forced_speed_duplex = ADVERTISE_100_HALF;
  		break;
  	case SPEED_100 + DUPLEX_FULL:
  		mac->forced_speed_duplex = ADVERTISE_100_FULL;
  		break;
  	case SPEED_1000 + DUPLEX_FULL:
  		mac->autoneg = 1;
  		adapter->hw.phy.autoneg_advertised = ADVERTISE_1000_FULL;
  		break;
  	case SPEED_1000 + DUPLEX_HALF: /* not supported */
  	default:
  		dev_err(pci_dev_to_dev(pdev), "Unsupported Speed/Duplex configuration\n");
  		return -EINVAL;
  	}
  
  	/* clear MDI, MDI(-X) override is only allowed when autoneg enabled */
  	adapter->hw.phy.mdix = AUTO_ALL_MODES;
  
  	return 0;
  }
  
  static int __igb_shutdown(struct pci_dev *pdev, bool *enable_wake,
  			  bool runtime)
  {
  	struct net_device *netdev = pci_get_drvdata(pdev);
  	struct igb_adapter *adapter = netdev_priv(netdev);
  	struct e1000_hw *hw = &adapter->hw;
  	u32 ctrl, rctl, status;
  	u32 wufc = runtime ? E1000_WUFC_LNKC : adapter->wol;
  #ifdef CONFIG_PM
  	int retval = 0;
  #endif
  
  	netif_device_detach(netdev);
  
  	status = E1000_READ_REG(hw, E1000_STATUS);
  	if (status & E1000_STATUS_LU)
  		wufc &= ~E1000_WUFC_LNKC;
  
  	if (netif_running(netdev))
  		__igb_close(netdev, true);
  
  	igb_clear_interrupt_scheme(adapter);
  
  #ifdef CONFIG_PM
  	retval = pci_save_state(pdev);
  	if (retval)
  		return retval;
  #endif
  
  	if (wufc) {
  		igb_setup_rctl(adapter);
  		igb_set_rx_mode(netdev);
  
  		/* turn on all-multi mode if wake on multicast is enabled */
  		if (wufc & E1000_WUFC_MC) {
  			rctl = E1000_READ_REG(hw, E1000_RCTL);
  			rctl |= E1000_RCTL_MPE;
  			E1000_WRITE_REG(hw, E1000_RCTL, rctl);
  		}
  
  		ctrl = E1000_READ_REG(hw, E1000_CTRL);
  		/* phy power management enable */
  		#define E1000_CTRL_EN_PHY_PWR_MGMT 0x00200000
  		ctrl |= E1000_CTRL_ADVD3WUC;
  		E1000_WRITE_REG(hw, E1000_CTRL, ctrl);
  
  		/* Allow time for pending master requests to run */
  		e1000_disable_pcie_master(hw);
  
  		E1000_WRITE_REG(hw, E1000_WUC, E1000_WUC_PME_EN);
  		E1000_WRITE_REG(hw, E1000_WUFC, wufc);
  	} else {
  		E1000_WRITE_REG(hw, E1000_WUC, 0);
  		E1000_WRITE_REG(hw, E1000_WUFC, 0);
  	}
  
  	*enable_wake = wufc || adapter->en_mng_pt;
  	if (!*enable_wake)
  		igb_power_down_link(adapter);
  	else
  		igb_power_up_link(adapter);
  
  	/* Release control of h/w to f/w.  If f/w is AMT enabled, this
  	 * would have already happened in close and is redundant. */
  	igb_release_hw_control(adapter);
  
  	pci_disable_device(pdev);
  
  	return 0;
  }
  
  #ifdef CONFIG_PM
  #ifdef HAVE_SYSTEM_SLEEP_PM_OPS
  static int igb_suspend(struct device *dev)
  #else
  static int igb_suspend(struct pci_dev *pdev, pm_message_t state)
  #endif /* HAVE_SYSTEM_SLEEP_PM_OPS */
  {
  #ifdef HAVE_SYSTEM_SLEEP_PM_OPS
  	struct pci_dev *pdev = to_pci_dev(dev);
  #endif /* HAVE_SYSTEM_SLEEP_PM_OPS */
  	int retval;
  	bool wake;
  
  	retval = __igb_shutdown(pdev, &wake, 0);
  	if (retval)
  		return retval;
  
  	if (wake) {
  		pci_prepare_to_sleep(pdev);
  	} else {
  		pci_wake_from_d3(pdev, false);
  		pci_set_power_state(pdev, PCI_D3hot);
  	}
  
  	return 0;
  }
  
  #ifdef HAVE_SYSTEM_SLEEP_PM_OPS
  static int igb_resume(struct device *dev)
  #else
  static int igb_resume(struct pci_dev *pdev)
  #endif /* HAVE_SYSTEM_SLEEP_PM_OPS */
  {
  #ifdef HAVE_SYSTEM_SLEEP_PM_OPS
  	struct pci_dev *pdev = to_pci_dev(dev);
  #endif /* HAVE_SYSTEM_SLEEP_PM_OPS */
  	struct net_device *netdev = pci_get_drvdata(pdev);
  	struct igb_adapter *adapter = netdev_priv(netdev);
  	struct e1000_hw *hw = &adapter->hw;
  	u32 err;
  
  	pci_set_power_state(pdev, PCI_D0);
  	pci_restore_state(pdev);
  	pci_save_state(pdev);
  
  	err = pci_enable_device_mem(pdev);
  	if (err) {
  		dev_err(pci_dev_to_dev(pdev),
  			"igb: Cannot enable PCI device from suspend\n");
  		return err;
  	}
  	pci_set_master(pdev);
  
  	pci_enable_wake(pdev, PCI_D3hot, 0);
  	pci_enable_wake(pdev, PCI_D3cold, 0);
  
  	if (igb_init_interrupt_scheme(adapter, true)) {
  		dev_err(pci_dev_to_dev(pdev), "Unable to allocate memory for queues\n");
  		return -ENOMEM;
  	}
  
  	igb_reset(adapter);
  
  	/* let the f/w know that the h/w is now under the control of the
  	 * driver. */
  	igb_get_hw_control(adapter);
  
  	E1000_WRITE_REG(hw, E1000_WUS, ~0);
  
  	if (netdev->flags & IFF_UP) {
  		rtnl_lock();
  		err = __igb_open(netdev, true);
  		rtnl_unlock();
  		if (err)
  			return err;
  	}
  
  	netif_device_attach(netdev);
  
  	return 0;
  }
  
  #ifdef CONFIG_PM_RUNTIME
  #ifdef HAVE_SYSTEM_SLEEP_PM_OPS
  static int igb_runtime_idle(struct device *dev)
  {
  	struct pci_dev *pdev = to_pci_dev(dev);
  	struct net_device *netdev = pci_get_drvdata(pdev);
  	struct igb_adapter *adapter = netdev_priv(netdev);
  
  	if (!igb_has_link(adapter))
  		pm_schedule_suspend(dev, MSEC_PER_SEC * 5);
  
  	return -EBUSY;
  }
  
  static int igb_runtime_suspend(struct device *dev)
  {
  	struct pci_dev *pdev = to_pci_dev(dev);
  	int retval;
  	bool wake;
  
  	retval = __igb_shutdown(pdev, &wake, 1);
  	if (retval)
  		return retval;
  
  	if (wake) {
  		pci_prepare_to_sleep(pdev);
  	} else {
  		pci_wake_from_d3(pdev, false);
  		pci_set_power_state(pdev, PCI_D3hot);
  	}
  
  	return 0;
  }
  
  static int igb_runtime_resume(struct device *dev)
  {
  	return igb_resume(dev);
  }
  #endif /* HAVE_SYSTEM_SLEEP_PM_OPS */
  #endif /* CONFIG_PM_RUNTIME */
  #endif /* CONFIG_PM */
  
  #ifdef USE_REBOOT_NOTIFIER
  /* only want to do this for 2.4 kernels? */
  static int igb_notify_reboot(struct notifier_block *nb, unsigned long event,
                               void *p)
  {
  	struct pci_dev *pdev = NULL;
  	bool wake;
  
  	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) == &igb_driver) {
  				__igb_shutdown(pdev, &wake, 0);
  				if (event == SYS_POWER_OFF) {
  					pci_wake_from_d3(pdev, wake);
  					pci_set_power_state(pdev, PCI_D3hot);
  				}
  			}
  		}
  	}
  	return NOTIFY_DONE;
  }
  #else
  static void igb_shutdown(struct pci_dev *pdev)
  {
  	bool wake = false;
  
  	__igb_shutdown(pdev, &wake, 0);
  
  	if (system_state == SYSTEM_POWER_OFF) {
  		pci_wake_from_d3(pdev, wake);
  		pci_set_power_state(pdev, PCI_D3hot);
  	}
  }
  #endif /* USE_REBOOT_NOTIFIER */
  
  #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 igb_netpoll(struct net_device *netdev)
  {
  	struct igb_adapter *adapter = netdev_priv(netdev);
  	struct e1000_hw *hw = &adapter->hw;
  	struct igb_q_vector *q_vector;
  	int i;
  
  	for (i = 0; i < adapter->num_q_vectors; i++) {
  		q_vector = adapter->q_vector[i];
  		if (adapter->msix_entries)
  			E1000_WRITE_REG(hw, E1000_EIMC, q_vector->eims_value);
  		else
  			igb_irq_disable(adapter);
  		napi_schedule(&q_vector->napi);
  	}
  }
  #endif /* CONFIG_NET_POLL_CONTROLLER */
  
  #ifdef HAVE_PCI_ERS
  #define E1000_DEV_ID_82576_VF 0x10CA
  /**
   * igb_io_error_detected - called when PCI error is detected
   * @pdev: Pointer to PCI device
   * @state: The current pci connection state
   *
   * This function is called after a PCI bus error affecting
   * this device has been detected.
   */
  static pci_ers_result_t igb_io_error_detected(struct pci_dev *pdev,
  					      pci_channel_state_t state)
  {
  	struct net_device *netdev = pci_get_drvdata(pdev);
  	struct igb_adapter *adapter = netdev_priv(netdev);
  
  #ifdef CONFIG_PCI_IOV__UNUSED
  	struct pci_dev *bdev, *vfdev;
  	u32 dw0, dw1, dw2, dw3;
  	int vf, pos;
  	u16 req_id, pf_func;
  
  	if (!(adapter->flags & IGB_FLAG_DETECT_BAD_DMA))
  		goto skip_bad_vf_detection;
  
  	bdev = pdev->bus->self;
  	while (bdev && (pci_pcie_type(bdev) != PCI_EXP_TYPE_ROOT_PORT))
  		bdev = bdev->bus->self;
  
  	if (!bdev)
  		goto skip_bad_vf_detection;
  
  	pos = pci_find_ext_capability(bdev, PCI_EXT_CAP_ID_ERR);
  	if (!pos)
  		goto skip_bad_vf_detection;
  
  	pci_read_config_dword(bdev, pos + PCI_ERR_HEADER_LOG, &dw0);
  	pci_read_config_dword(bdev, pos + PCI_ERR_HEADER_LOG + 4, &dw1);
  	pci_read_config_dword(bdev, pos + PCI_ERR_HEADER_LOG + 8, &dw2);
  	pci_read_config_dword(bdev, pos + PCI_ERR_HEADER_LOG + 12, &dw3);
  
  	req_id = dw1 >> 16;
  	/* On the 82576 if bit 7 of the requestor ID is set then it's a VF */
  	if (!(req_id & 0x0080))
  		goto skip_bad_vf_detection;
  
  	pf_func = req_id & 0x01;
  	if ((pf_func & 1) == (pdev->devfn & 1)) {
  
  		vf = (req_id & 0x7F) >> 1;
  		dev_err(pci_dev_to_dev(pdev),
  			"VF %d has caused a PCIe error\n", vf);
  		dev_err(pci_dev_to_dev(pdev),
  			"TLP: dw0: %8.8x\tdw1: %8.8x\tdw2: "
  			"%8.8x\tdw3: %8.8x\n",
  			dw0, dw1, dw2, dw3);
  
  		/* Find the pci device of the offending VF */
  		vfdev = pci_get_device(PCI_VENDOR_ID_INTEL,
  				       E1000_DEV_ID_82576_VF, NULL);
  		while (vfdev) {
  			if (vfdev->devfn == (req_id & 0xFF))
  				break;
  			vfdev = pci_get_device(PCI_VENDOR_ID_INTEL,
  					       E1000_DEV_ID_82576_VF, vfdev);
  		}
  		/*
  		 * There's a slim chance the VF could have been hot plugged,
  		 * so if it is no longer present we don't need to issue the
  		 * VFLR.  Just clean up the AER in that case.
  		 */
  		if (vfdev) {
  			dev_err(pci_dev_to_dev(pdev),
  				"Issuing VFLR to VF %d\n", vf);
  			pci_write_config_dword(vfdev, 0xA8, 0x00008000);
  		}
  
  		pci_cleanup_aer_uncorrect_error_status(pdev);
  	}
  
  	/*
  	 * Even though the error may have occurred on the other port
  	 * we still need to increment the vf error reference count for
  	 * both ports because the I/O resume function will be called
  	 * for both of them.
  	 */
  	adapter->vferr_refcount++;
  
  	return PCI_ERS_RESULT_RECOVERED;
  
  skip_bad_vf_detection:
  #endif /* CONFIG_PCI_IOV */
  
  	netif_device_detach(netdev);
  
  	if (state == pci_channel_io_perm_failure)
  		return PCI_ERS_RESULT_DISCONNECT;
  
  	if (netif_running(netdev))
  		igb_down(adapter);
  	pci_disable_device(pdev);
  
  	/* Request a slot slot reset. */
  	return PCI_ERS_RESULT_NEED_RESET;
  }
  
  /**
   * igb_io_slot_reset - called after the pci bus has been reset.
   * @pdev: Pointer to PCI device
   *
   * Restart the card from scratch, as if from a cold-boot. Implementation
   * resembles the first-half of the igb_resume routine.
   */
  static pci_ers_result_t igb_io_slot_reset(struct pci_dev *pdev)
  {
  	struct net_device *netdev = pci_get_drvdata(pdev);
  	struct igb_adapter *adapter = netdev_priv(netdev);
  	struct e1000_hw *hw = &adapter->hw;
  	pci_ers_result_t result;
  
  	if (pci_enable_device_mem(pdev)) {
  		dev_err(pci_dev_to_dev(pdev),
  			"Cannot re-enable PCI device after reset.\n");
  		result = PCI_ERS_RESULT_DISCONNECT;
  	} else {
  		pci_set_master(pdev);
  		pci_restore_state(pdev);
  		pci_save_state(pdev);
  
  		pci_enable_wake(pdev, PCI_D3hot, 0);
  		pci_enable_wake(pdev, PCI_D3cold, 0);
  
  		schedule_work(&adapter->reset_task);
  		E1000_WRITE_REG(hw, E1000_WUS, ~0);
  		result = PCI_ERS_RESULT_RECOVERED;
  	}
  
  	pci_cleanup_aer_uncorrect_error_status(pdev);
  
  	return result;
  }
  
  /**
   * igb_io_resume - called when traffic can start flowing again.
   * @pdev: Pointer to PCI device
   *
   * This callback is called when the error recovery driver tells us that
   * its OK to resume normal operation. Implementation resembles the
   * second-half of the igb_resume routine.
   */
  static void igb_io_resume(struct pci_dev *pdev)
  {
  	struct net_device *netdev = pci_get_drvdata(pdev);
  	struct igb_adapter *adapter = netdev_priv(netdev);
  
  	if (adapter->vferr_refcount) {
  		dev_info(pci_dev_to_dev(pdev), "Resuming after VF err\n");
  		adapter->vferr_refcount--;
  		return;
  	}
  
  	if (netif_running(netdev)) {
  		if (igb_up(adapter)) {
  			dev_err(pci_dev_to_dev(pdev), "igb_up failed after reset\n");
  			return;
  		}
  	}
  
  	netif_device_attach(netdev);
  
  	/* let the f/w know that the h/w is now under the control of the
  	 * driver. */
  	igb_get_hw_control(adapter);
  }
  
  #endif /* HAVE_PCI_ERS */
  
  int igb_add_mac_filter(struct igb_adapter *adapter, u8 *addr, u16 queue)
  {
  	struct e1000_hw *hw = &adapter->hw;
  	int i;
  
  	if (is_zero_ether_addr(addr))
  		return 0;
  
  	for (i = 0; i < hw->mac.rar_entry_count; i++) {
  		if (adapter->mac_table[i].state & IGB_MAC_STATE_IN_USE)
  			continue;
  		adapter->mac_table[i].state = (IGB_MAC_STATE_MODIFIED |
  						   IGB_MAC_STATE_IN_USE);
  		memcpy(adapter->mac_table[i].addr, addr, ETH_ALEN);
  		adapter->mac_table[i].queue = queue;
  		igb_sync_mac_table(adapter);
  		return 0;
  	}
  	return -ENOMEM;
  }
  int igb_del_mac_filter(struct igb_adapter *adapter, u8* addr, u16 queue)
  {
  	/* search table for addr, if found, set to 0 and sync */
  	int i;
  	struct e1000_hw *hw = &adapter->hw;
  
  	if (is_zero_ether_addr(addr))
  		return 0;
  	for (i = 0; i < hw->mac.rar_entry_count; i++) {
  		if (ether_addr_equal(addr, adapter->mac_table[i].addr) &&
  		    adapter->mac_table[i].queue == queue) {
  			adapter->mac_table[i].state = IGB_MAC_STATE_MODIFIED;
  			memset(adapter->mac_table[i].addr, 0, ETH_ALEN);
  			adapter->mac_table[i].queue = 0;
  			igb_sync_mac_table(adapter);
  			return 0;
  		}
  	}
  	return -ENOMEM;
  }
  static int igb_set_vf_mac(struct igb_adapter *adapter,
                            int vf, unsigned char *mac_addr)
  {
  	igb_del_mac_filter(adapter, adapter->vf_data[vf].vf_mac_addresses, vf);
  	memcpy(adapter->vf_data[vf].vf_mac_addresses, mac_addr, ETH_ALEN);
  
  	igb_add_mac_filter(adapter, mac_addr, vf);
  
  	return 0;
  }
  
  #ifdef IFLA_VF_MAX
  static int igb_ndo_set_vf_mac(struct net_device *netdev, int vf, u8 *mac)
  {
  	struct igb_adapter *adapter = netdev_priv(netdev);
  	if (!is_valid_ether_addr(mac) || (vf >= adapter->vfs_allocated_count))
  		return -EINVAL;
  	adapter->vf_data[vf].flags |= IGB_VF_FLAG_PF_SET_MAC;
  	dev_info(&adapter->pdev->dev, "setting MAC %pM on VF %d\n", mac, vf);
  	dev_info(&adapter->pdev->dev, "Reload the VF driver to make this"
  				      " change effective.\n");
  	if (test_bit(__IGB_DOWN, &adapter->state)) {
  		dev_warn(&adapter->pdev->dev, "The VF MAC address has been set,"
  			 " but the PF device is not up.\n");
  		dev_warn(&adapter->pdev->dev, "Bring the PF device up before"
  			 " attempting to use the VF device.\n");
  	}
  	return igb_set_vf_mac(adapter, vf, mac);
  }
  
  static int igb_link_mbps(int internal_link_speed)
  {
  	switch (internal_link_speed) {
  	case SPEED_100:
  		return 100;
  	case SPEED_1000:
  		return 1000;
  	case SPEED_2500:
  		return 2500;
  	default:
  		return 0;
  	}
  }
  
  static void igb_set_vf_rate_limit(struct e1000_hw *hw, int vf, int tx_rate,
  			int link_speed)
  {
  	int rf_dec, rf_int;
  	u32 bcnrc_val;
  
  	if (tx_rate != 0) {
  		/* Calculate the rate factor values to set */
  		rf_int = link_speed / tx_rate;
  		rf_dec = (link_speed - (rf_int * tx_rate));
  		rf_dec = (rf_dec * (1<<E1000_RTTBCNRC_RF_INT_SHIFT)) / tx_rate;
  
  		bcnrc_val = E1000_RTTBCNRC_RS_ENA;
  		bcnrc_val |= ((rf_int<<E1000_RTTBCNRC_RF_INT_SHIFT) &
  				E1000_RTTBCNRC_RF_INT_MASK);
  		bcnrc_val |= (rf_dec & E1000_RTTBCNRC_RF_DEC_MASK);
  	} else {
  		bcnrc_val = 0;
  	}
  
  	E1000_WRITE_REG(hw, E1000_RTTDQSEL, vf); /* vf X uses queue X */
  	/*
  	 * Set global transmit compensation time to the MMW_SIZE in RTTBCNRM
  	 * register. MMW_SIZE=0x014 if 9728-byte jumbo is supported.
  	 */
  	E1000_WRITE_REG(hw, E1000_RTTBCNRM(0), 0x14);
  	E1000_WRITE_REG(hw, E1000_RTTBCNRC, bcnrc_val);
  }
  
  static void igb_check_vf_rate_limit(struct igb_adapter *adapter)
  {
  	int actual_link_speed, i;
  	bool reset_rate = false;
  
  	/* VF TX rate limit was not set */
  	if ((adapter->vf_rate_link_speed == 0) ||
  		(adapter->hw.mac.type != e1000_82576))
  		return;
  
  	actual_link_speed = igb_link_mbps(adapter->link_speed);
  	if (actual_link_speed != adapter->vf_rate_link_speed) {
  		reset_rate = true;
  		adapter->vf_rate_link_speed = 0;
  		dev_info(&adapter->pdev->dev,
  		"Link speed has been changed. VF Transmit rate is disabled\n");
  	}
  
  	for (i = 0; i < adapter->vfs_allocated_count; i++) {
  		if (reset_rate)
  			adapter->vf_data[i].tx_rate = 0;
  
  		igb_set_vf_rate_limit(&adapter->hw, i,
  			adapter->vf_data[i].tx_rate, actual_link_speed);
  	}
  }
  
  #ifdef HAVE_VF_MIN_MAX_TXRATE
  static int igb_ndo_set_vf_bw(struct net_device *netdev, int vf, int min_tx_rate,
  			     int tx_rate)
  #else /* HAVE_VF_MIN_MAX_TXRATE */
  static int igb_ndo_set_vf_bw(struct net_device *netdev, int vf, int tx_rate)
  #endif /* HAVE_VF_MIN_MAX_TXRATE */
  {
  	struct igb_adapter *adapter = netdev_priv(netdev);
  	struct e1000_hw *hw = &adapter->hw;
  	int actual_link_speed;
  
  	if (hw->mac.type != e1000_82576)
  		return -EOPNOTSUPP;
  
  #ifdef HAVE_VF_MIN_MAX_TXRATE
  	if (min_tx_rate)
  		return -EINVAL;
  #endif /* HAVE_VF_MIN_MAX_TXRATE */
  
  	actual_link_speed = igb_link_mbps(adapter->link_speed);
  	if ((vf >= adapter->vfs_allocated_count) ||
  		(!(E1000_READ_REG(hw, E1000_STATUS) & E1000_STATUS_LU)) ||
  		(tx_rate < 0) || (tx_rate > actual_link_speed))
  		return -EINVAL;
  
  	adapter->vf_rate_link_speed = actual_link_speed;
  	adapter->vf_data[vf].tx_rate = (u16)tx_rate;
  	igb_set_vf_rate_limit(hw, vf, tx_rate, actual_link_speed);
  
  	return 0;
  }
  
  static int igb_ndo_get_vf_config(struct net_device *netdev,
  				 int vf, struct ifla_vf_info *ivi)
  {
  	struct igb_adapter *adapter = netdev_priv(netdev);
  	if (vf >= adapter->vfs_allocated_count)
  		return -EINVAL;
  	ivi->vf = vf;
  	memcpy(&ivi->mac, adapter->vf_data[vf].vf_mac_addresses, ETH_ALEN);
  #ifdef HAVE_VF_MIN_MAX_TXRATE
  	ivi->max_tx_rate = adapter->vf_data[vf].tx_rate;
  	ivi->min_tx_rate = 0;
  #else /* HAVE_VF_MIN_MAX_TXRATE */
  	ivi->tx_rate = adapter->vf_data[vf].tx_rate;
  #endif /* HAVE_VF_MIN_MAX_TXRATE */
  	ivi->vlan = adapter->vf_data[vf].pf_vlan;
  	ivi->qos = adapter->vf_data[vf].pf_qos;
  #ifdef HAVE_VF_SPOOFCHK_CONFIGURE
  	ivi->spoofchk = adapter->vf_data[vf].spoofchk_enabled;
  #endif
  	return 0;
  }
  #endif
  static void igb_vmm_control(struct igb_adapter *adapter)
  {
  	struct e1000_hw *hw = &adapter->hw;
  	int count;
  	u32 reg;
  
  	switch (hw->mac.type) {
  	case e1000_82575:
  	default:
  		/* replication is not supported for 82575 */
  		return;
  	case e1000_82576:
  		/* notify HW that the MAC is adding vlan tags */
  		reg = E1000_READ_REG(hw, E1000_DTXCTL);
  		reg |= (E1000_DTXCTL_VLAN_ADDED |
  			E1000_DTXCTL_SPOOF_INT);
  		E1000_WRITE_REG(hw, E1000_DTXCTL, reg);
  	case e1000_82580:
  		/* enable replication vlan tag stripping */
  		reg = E1000_READ_REG(hw, E1000_RPLOLR);
  		reg |= E1000_RPLOLR_STRVLAN;
  		E1000_WRITE_REG(hw, E1000_RPLOLR, reg);
  	case e1000_i350:
  	case e1000_i354:
  		/* none of the above registers are supported by i350 */
  		break;
  	}
  
  	/* Enable Malicious Driver Detection */
  	if ((adapter->vfs_allocated_count) &&
  	    (adapter->mdd)) {
  		if (hw->mac.type == e1000_i350)
  			igb_enable_mdd(adapter);
  	}
  
  		/* enable replication and loopback support */
  		count = adapter->vfs_allocated_count || adapter->vmdq_pools;
  		if (adapter->flags & IGB_FLAG_LOOPBACK_ENABLE && count)
  			e1000_vmdq_set_loopback_pf(hw, 1);
  		e1000_vmdq_set_anti_spoofing_pf(hw,
  			adapter->vfs_allocated_count || adapter->vmdq_pools,
  			adapter->vfs_allocated_count);
  	e1000_vmdq_set_replication_pf(hw, adapter->vfs_allocated_count ||
  				      adapter->vmdq_pools);
  }
  
  static void igb_init_fw(struct igb_adapter *adapter)
  {
  	struct e1000_fw_drv_info fw_cmd;
  	struct e1000_hw *hw = &adapter->hw;
  	int i;
  	u16 mask;
  
  	if (hw->mac.type == e1000_i210)
  		mask = E1000_SWFW_EEP_SM;
  	else
  		mask = E1000_SWFW_PHY0_SM;
  	/* i211 parts do not support this feature */
  	if (hw->mac.type == e1000_i211)
  		hw->mac.arc_subsystem_valid = false;
  
  	if (!hw->mac.ops.acquire_swfw_sync(hw, mask)) {
  		for (i = 0; i <= FW_MAX_RETRIES; i++) {
  			E1000_WRITE_REG(hw, E1000_FWSTS, E1000_FWSTS_FWRI);
  			fw_cmd.hdr.cmd = FW_CMD_DRV_INFO;
  			fw_cmd.hdr.buf_len = FW_CMD_DRV_INFO_LEN;
  			fw_cmd.hdr.cmd_or_resp.cmd_resv = FW_CMD_RESERVED;
  			fw_cmd.port_num = hw->bus.func;
  			fw_cmd.drv_version = FW_FAMILY_DRV_VER;
  			fw_cmd.hdr.checksum = 0;
  			fw_cmd.hdr.checksum = e1000_calculate_checksum((u8 *)&fw_cmd,
  			                                           (FW_HDR_LEN +
  			                                            fw_cmd.hdr.buf_len));
  			 e1000_host_interface_command(hw, (u8*)&fw_cmd,
  			                             sizeof(fw_cmd));
  			if (fw_cmd.hdr.cmd_or_resp.ret_status == FW_STATUS_SUCCESS)
  				break;
  		}
  	} else
  		dev_warn(pci_dev_to_dev(adapter->pdev),
  			 "Unable to get semaphore, firmware init failed.\n");
  	hw->mac.ops.release_swfw_sync(hw, mask);
  }
  
  static void igb_init_dmac(struct igb_adapter *adapter, u32 pba)
  {
  	struct e1000_hw *hw = &adapter->hw;
  	u32 dmac_thr;
  	u16 hwm;
  	u32 status;
  
  	if (hw->mac.type == e1000_i211)
  		return;
  
  	if (hw->mac.type > e1000_82580) {
  		if (adapter->dmac != IGB_DMAC_DISABLE) {
  			u32 reg;
  
  			/* force threshold to 0.  */
  			E1000_WRITE_REG(hw, E1000_DMCTXTH, 0);
  
  			/*
  			 * DMA Coalescing high water mark needs to be greater
  			 * than the Rx threshold. Set hwm to PBA - max frame
  			 * size in 16B units, capping it at PBA - 6KB.
  			 */
  			hwm = 64 * pba - adapter->max_frame_size / 16;
  			if (hwm < 64 * (pba - 6))
  				hwm = 64 * (pba - 6);
  			reg = E1000_READ_REG(hw, E1000_FCRTC);
  			reg &= ~E1000_FCRTC_RTH_COAL_MASK;
  			reg |= ((hwm << E1000_FCRTC_RTH_COAL_SHIFT)
  				& E1000_FCRTC_RTH_COAL_MASK);
  			E1000_WRITE_REG(hw, E1000_FCRTC, reg);
  
  			/*
  			 * Set the DMA Coalescing Rx threshold to PBA - 2 * max
  			 * frame size, capping it at PBA - 10KB.
  			 */
  			dmac_thr = pba - adapter->max_frame_size / 512;
  			if (dmac_thr < pba - 10)
  				dmac_thr = pba - 10;
  			reg = E1000_READ_REG(hw, E1000_DMACR);
  			reg &= ~E1000_DMACR_DMACTHR_MASK;
  			reg |= ((dmac_thr << E1000_DMACR_DMACTHR_SHIFT)
  				& E1000_DMACR_DMACTHR_MASK);
  
  			/* transition to L0x or L1 if available..*/
  			reg |= (E1000_DMACR_DMAC_EN | E1000_DMACR_DMAC_LX_MASK);
  
  			/* Check if status is 2.5Gb backplane connection
  			 * before configuration of watchdog timer, which is
  			 * in msec values in 12.8usec intervals
  			 * watchdog timer= msec values in 32usec intervals
  			 * for non 2.5Gb connection
  			 */
  			if (hw->mac.type == e1000_i354) {
  				status = E1000_READ_REG(hw, E1000_STATUS);
  				if ((status & E1000_STATUS_2P5_SKU) &&
  				    (!(status & E1000_STATUS_2P5_SKU_OVER)))
  					reg |= ((adapter->dmac * 5) >> 6);
  				else
  					reg |= ((adapter->dmac) >> 5);
  			} else {
  				reg |= ((adapter->dmac) >> 5);
  			}
  
  			/*
  			 * Disable BMC-to-OS Watchdog enable
  			 * on devices that support OS-to-BMC
  			 */
  			if (hw->mac.type != e1000_i354)
  				reg &= ~E1000_DMACR_DC_BMC2OSW_EN;
  			E1000_WRITE_REG(hw, E1000_DMACR, reg);
  
  			/* no lower threshold to disable coalescing(smart fifb)-UTRESH=0*/
  			E1000_WRITE_REG(hw, E1000_DMCRTRH, 0);
  
  			/* This sets the time to wait before requesting
  			 * transition to low power state to number of usecs
  			 * needed to receive 1 512 byte frame at gigabit
  			 * line rate. On i350 device, time to make transition
  			 * to Lx state is delayed by 4 usec with flush disable
  			 * bit set to avoid losing mailbox interrupts
  			 */
  			reg = E1000_READ_REG(hw, E1000_DMCTLX);
  			if (hw->mac.type == e1000_i350)
  				reg |= IGB_DMCTLX_DCFLUSH_DIS;
  
  			/* in 2.5Gb connection, TTLX unit is 0.4 usec
  			 * which is 0x4*2 = 0xA. But delay is still 4 usec
  			 */
  			if (hw->mac.type == e1000_i354) {
  				status = E1000_READ_REG(hw, E1000_STATUS);
  				if ((status & E1000_STATUS_2P5_SKU) &&
  				    (!(status & E1000_STATUS_2P5_SKU_OVER)))
  					reg |= 0xA;
  				else
  					reg |= 0x4;
  			} else {
  				reg |= 0x4;
  			}
  			E1000_WRITE_REG(hw, E1000_DMCTLX, reg);
  
  			/* free space in tx packet buffer to wake from DMA coal */
  			E1000_WRITE_REG(hw, E1000_DMCTXTH, (IGB_MIN_TXPBSIZE -
  				(IGB_TX_BUF_4096 + adapter->max_frame_size)) >> 6);
  
  			/* make low power state decision controlled by DMA coal */
  			reg = E1000_READ_REG(hw, E1000_PCIEMISC);
  			reg &= ~E1000_PCIEMISC_LX_DECISION;
  			E1000_WRITE_REG(hw, E1000_PCIEMISC, reg);
  		} /* endif adapter->dmac is not disabled */
  	} else if (hw->mac.type == e1000_82580) {
  		u32 reg = E1000_READ_REG(hw, E1000_PCIEMISC);
  		E1000_WRITE_REG(hw, E1000_PCIEMISC,
  		                reg & ~E1000_PCIEMISC_LX_DECISION);
  		E1000_WRITE_REG(hw, E1000_DMACR, 0);
  	}
  }
  
  #ifdef HAVE_I2C_SUPPORT
  /*  igb_read_i2c_byte - Reads 8 bit word over I2C
   *  @hw: pointer to hardware structure
   *  @byte_offset: byte offset to read
   *  @dev_addr: device address
   *  @data: value read
   *
   *  Performs byte read operation over I2C interface at
   *  a specified device address.
   */
  s32 igb_read_i2c_byte(struct e1000_hw *hw, u8 byte_offset,
  				u8 dev_addr, u8 *data)
  {
  	struct igb_adapter *adapter = container_of(hw, struct igb_adapter, hw);
  	struct i2c_client *this_client = adapter->i2c_client;
  	s32 status;
  	u16 swfw_mask = 0;
  
  	if (!this_client)
  		return E1000_ERR_I2C;
  
  	swfw_mask = E1000_SWFW_PHY0_SM;
  
  	if (hw->mac.ops.acquire_swfw_sync(hw, swfw_mask)
  	    != E1000_SUCCESS)
  		return E1000_ERR_SWFW_SYNC;
  
  	status = i2c_smbus_read_byte_data(this_client, byte_offset);
  	hw->mac.ops.release_swfw_sync(hw, swfw_mask);
  
  	if (status < 0)
  		return E1000_ERR_I2C;
  	else {
  		*data = status;
  		return E1000_SUCCESS;
  	}
  }
  
  /*  igb_write_i2c_byte - Writes 8 bit word over I2C
   *  @hw: pointer to hardware structure
   *  @byte_offset: byte offset to write
   *  @dev_addr: device address
   *  @data: value to write
   *
   *  Performs byte write operation over I2C interface at
   *  a specified device address.
   */
  s32 igb_write_i2c_byte(struct e1000_hw *hw, u8 byte_offset,
  				 u8 dev_addr, u8 data)
  {
  	struct igb_adapter *adapter = container_of(hw, struct igb_adapter, hw);
  	struct i2c_client *this_client = adapter->i2c_client;
  	s32 status;
  	u16 swfw_mask = E1000_SWFW_PHY0_SM;
  
  	if (!this_client)
  		return E1000_ERR_I2C;
  
  	if (hw->mac.ops.acquire_swfw_sync(hw, swfw_mask) != E1000_SUCCESS)
  		return E1000_ERR_SWFW_SYNC;
  	status = i2c_smbus_write_byte_data(this_client, byte_offset, data);
  	hw->mac.ops.release_swfw_sync(hw, swfw_mask);
  
  	if (status)
  		return E1000_ERR_I2C;
  	else
  		return E1000_SUCCESS;
  }
  #endif /*  HAVE_I2C_SUPPORT */
  /* igb_main.c */
  
  
  /**
   * igb_probe - Device Initialization Routine
   * @pdev: PCI device information struct
   * @ent: entry in igb_pci_tbl
   *
   * Returns 0 on success, negative on failure
   *
   * igb_probe initializes an adapter identified by a pci_dev structure.
   * The OS initialization, configuring of the adapter private structure,
   * and a hardware reset occur.
   **/
  int igb_kni_probe(struct pci_dev *pdev,
  			       struct net_device **lad_dev)
  {
  	struct net_device *netdev;
  	struct igb_adapter *adapter;
  	struct e1000_hw *hw;
  	u16 eeprom_data = 0;
  	u8 pba_str[E1000_PBANUM_LENGTH];
  	s32 ret_val;
  	static int global_quad_port_a; /* global quad port a indication */
  	int i, err, pci_using_dac = 0;
  	static int cards_found;
  
  	err = pci_enable_device_mem(pdev);
  	if (err)
  		return err;
  
  #ifdef NO_KNI
  	pci_using_dac = 0;
  	err = dma_set_mask(pci_dev_to_dev(pdev), DMA_BIT_MASK(64));
  	if (!err) {
  		err = dma_set_coherent_mask(pci_dev_to_dev(pdev), DMA_BIT_MASK(64));
  		if (!err)
  			pci_using_dac = 1;
  	} else {
  		err = dma_set_mask(pci_dev_to_dev(pdev), DMA_BIT_MASK(32));
  		if (err) {
  			err = dma_set_coherent_mask(pci_dev_to_dev(pdev), DMA_BIT_MASK(32));
  			if (err) {
  				IGB_ERR("No usable DMA configuration, "
  				        "aborting\n");
  				goto err_dma;
  			}
  		}
  	}
  
  #ifndef HAVE_ASPM_QUIRKS
  	/* 82575 requires that the pci-e link partner disable the L0s state */
  	switch (pdev->device) {
  	case E1000_DEV_ID_82575EB_COPPER:
  	case E1000_DEV_ID_82575EB_FIBER_SERDES:
  	case E1000_DEV_ID_82575GB_QUAD_COPPER:
  		pci_disable_link_state(pdev, PCIE_LINK_STATE_L0S);
  	default:
  		break;
  	}
  
  #endif /* HAVE_ASPM_QUIRKS */
  	err = pci_request_selected_regions(pdev,
  	                                   pci_select_bars(pdev,
                                                             IORESOURCE_MEM),
  	                                   igb_driver_name);
  	if (err)
  		goto err_pci_reg;
  
  	pci_enable_pcie_error_reporting(pdev);
  
  	pci_set_master(pdev);
  
  	err = -ENOMEM;
  #endif /* NO_KNI */
  #ifdef HAVE_TX_MQ
  	netdev = alloc_etherdev_mq(sizeof(struct igb_adapter),
  	                           IGB_MAX_TX_QUEUES);
  #else
  	netdev = alloc_etherdev(sizeof(struct igb_adapter));
  #endif /* HAVE_TX_MQ */
  	if (!netdev)
  		goto err_alloc_etherdev;
  
  	SET_MODULE_OWNER(netdev);
  	SET_NETDEV_DEV(netdev, &pdev->dev);
  
  	//pci_set_drvdata(pdev, netdev);
  	adapter = netdev_priv(netdev);
  	adapter->netdev = netdev;
  	adapter->pdev = pdev;
  	hw = &adapter->hw;
  	hw->back = adapter;
  	adapter->port_num = hw->bus.func;
  	adapter->msg_enable = (1 << debug) - 1;
  
  #ifdef HAVE_PCI_ERS
  	err = pci_save_state(pdev);
  	if (err)
  		goto err_ioremap;
  #endif
  	err = -EIO;
  	hw->hw_addr = ioremap(pci_resource_start(pdev, 0),
  	                      pci_resource_len(pdev, 0));
  	if (!hw->hw_addr)
  		goto err_ioremap;
  
  #ifdef HAVE_NET_DEVICE_OPS
  	netdev->netdev_ops = &igb_netdev_ops;
  #else /* HAVE_NET_DEVICE_OPS */
  	netdev->open = &igb_open;
  	netdev->stop = &igb_close;
  	netdev->get_stats = &igb_get_stats;
  #ifdef HAVE_SET_RX_MODE
  	netdev->set_rx_mode = &igb_set_rx_mode;
  #endif
  	netdev->set_multicast_list = &igb_set_rx_mode;
  	netdev->set_mac_address = &igb_set_mac;
  	netdev->change_mtu = &igb_change_mtu;
  	netdev->do_ioctl = &igb_ioctl;
  #ifdef HAVE_TX_TIMEOUT
  	netdev->tx_timeout = &igb_tx_timeout;
  #endif
  	netdev->vlan_rx_register = igb_vlan_mode;
  	netdev->vlan_rx_add_vid = igb_vlan_rx_add_vid;
  	netdev->vlan_rx_kill_vid = igb_vlan_rx_kill_vid;
  #ifdef CONFIG_NET_POLL_CONTROLLER
  	netdev->poll_controller = igb_netpoll;
  #endif
  	netdev->hard_start_xmit = &igb_xmit_frame;
  #endif /* HAVE_NET_DEVICE_OPS */
  	igb_set_ethtool_ops(netdev);
  #ifdef HAVE_TX_TIMEOUT
  	netdev->watchdog_timeo = 5 * HZ;
  #endif
  
  	strncpy(netdev->name, pci_name(pdev), sizeof(netdev->name) - 1);
  
  	adapter->bd_number = cards_found;
  
  	/* setup the private structure */
  	err = igb_sw_init(adapter);
  	if (err)
  		goto err_sw_init;
  
  	e1000_get_bus_info(hw);
  
  	hw->phy.autoneg_wait_to_complete = FALSE;
  	hw->mac.adaptive_ifs = FALSE;
  
  	/* Copper options */
  	if (hw->phy.media_type == e1000_media_type_copper) {
  		hw->phy.mdix = AUTO_ALL_MODES;
  		hw->phy.disable_polarity_correction = FALSE;
  		hw->phy.ms_type = e1000_ms_hw_default;
  	}
  
  	if (e1000_check_reset_block(hw))
  		dev_info(pci_dev_to_dev(pdev),
  			"PHY reset is blocked due to SOL/IDER session.\n");
  
  	/*
  	 * features is initialized to 0 in allocation, it might have bits
  	 * set by igb_sw_init so we should use an or instead of an
  	 * assignment.
  	 */
  	netdev->features |= NETIF_F_SG |
  			    NETIF_F_IP_CSUM |
  #ifdef NETIF_F_IPV6_CSUM
  			    NETIF_F_IPV6_CSUM |
  #endif
  #ifdef NETIF_F_TSO
  			    NETIF_F_TSO |
  #ifdef NETIF_F_TSO6
  			    NETIF_F_TSO6 |
  #endif
  #endif /* NETIF_F_TSO */
  #ifdef NETIF_F_RXHASH
  			    NETIF_F_RXHASH |
  #endif
  			    NETIF_F_RXCSUM |
  #ifdef NETIF_F_HW_VLAN_CTAG_RX
  			    NETIF_F_HW_VLAN_CTAG_RX |
  			    NETIF_F_HW_VLAN_CTAG_TX;
  #else
  			    NETIF_F_HW_VLAN_RX |
  			    NETIF_F_HW_VLAN_TX;
  #endif
  
  	if (hw->mac.type >= e1000_82576)
  		netdev->features |= NETIF_F_SCTP_CSUM;
  
  #ifdef HAVE_NDO_SET_FEATURES
  	/* copy netdev features into list of user selectable features */
  	netdev->hw_features |= netdev->features;
  #ifndef IGB_NO_LRO
  
  	/* give us the option of enabling LRO later */
  	netdev->hw_features |= NETIF_F_LRO;
  #endif
  #else
  #ifdef NETIF_F_GRO
  
  	/* this is only needed on kernels prior to 2.6.39 */
  	netdev->features |= NETIF_F_GRO;
  #endif
  #endif
  
  	/* set this bit last since it cannot be part of hw_features */
  #ifdef NETIF_F_HW_VLAN_CTAG_FILTER
  	netdev->features |= NETIF_F_HW_VLAN_CTAG_FILTER;
  #else
  	netdev->features |= NETIF_F_HW_VLAN_FILTER;
  #endif
  
  #ifdef HAVE_NETDEV_VLAN_FEATURES
  	netdev->vlan_features |= NETIF_F_TSO |
  				 NETIF_F_TSO6 |
  				 NETIF_F_IP_CSUM |
  				 NETIF_F_IPV6_CSUM |
  				 NETIF_F_SG;
  
  #endif
  	if (pci_using_dac)
  		netdev->features |= NETIF_F_HIGHDMA;
  
  #ifdef NO_KNI
  	adapter->en_mng_pt = e1000_enable_mng_pass_thru(hw);
  #ifdef DEBUG
  	if (adapter->dmac != IGB_DMAC_DISABLE)
  		printk("%s: DMA Coalescing is enabled..\n", netdev->name);
  #endif
  
  	/* before reading the NVM, reset the controller to put the device in a
  	 * known good starting state */
  	e1000_reset_hw(hw);
  #endif /* NO_KNI */
  
  	/* make sure the NVM is good */
  	if (e1000_validate_nvm_checksum(hw) < 0) {
  		dev_err(pci_dev_to_dev(pdev), "The NVM Checksum Is Not"
  		        " Valid\n");
  		err = -EIO;
  		goto err_eeprom;
  	}
  
  	/* copy the MAC address out of the NVM */
  	if (e1000_read_mac_addr(hw))
  		dev_err(pci_dev_to_dev(pdev), "NVM Read Error\n");
  	memcpy(netdev->dev_addr, hw->mac.addr, netdev->addr_len);
  #ifdef ETHTOOL_GPERMADDR
  	memcpy(netdev->perm_addr, hw->mac.addr, netdev->addr_len);
  
  	if (!is_valid_ether_addr(netdev->perm_addr)) {
  #else
  	if (!is_valid_ether_addr(netdev->dev_addr)) {
  #endif
  		dev_err(pci_dev_to_dev(pdev), "Invalid MAC Address\n");
  		err = -EIO;
  		goto err_eeprom;
  	}
  
  	memcpy(&adapter->mac_table[0].addr, hw->mac.addr, netdev->addr_len);
  	adapter->mac_table[0].queue = adapter->vfs_allocated_count;
  	adapter->mac_table[0].state = (IGB_MAC_STATE_DEFAULT | IGB_MAC_STATE_IN_USE);
  	igb_rar_set(adapter, 0);
  
  	/* get firmware version for ethtool -i */
  	igb_set_fw_version(adapter);
  
  	/* Check if Media Autosense is enabled */
  	if (hw->mac.type == e1000_82580)
  		igb_init_mas(adapter);
  
  #ifdef NO_KNI
  #ifdef HAVE_TIMER_SETUP
  	timer_setup(&adapter->watchdog_timer, &igb_watchdog, 0);
  	if (adapter->flags & IGB_FLAG_DETECT_BAD_DMA)
  		timer_setup(&adapter->dma_err_timer, &igb_dma_err_timer, 0);
  	timer_setup(&adapter->phy_info_timer, &igb_update_phy_info, 0);
  #else
  	setup_timer(&adapter->watchdog_timer, &igb_watchdog,
  	            (unsigned long) adapter);
  	if (adapter->flags & IGB_FLAG_DETECT_BAD_DMA)
  		setup_timer(&adapter->dma_err_timer, &igb_dma_err_timer,
  			    (unsigned long) adapter);
  	setup_timer(&adapter->phy_info_timer, &igb_update_phy_info,
  	            (unsigned long) adapter);
  #endif
  
  	INIT_WORK(&adapter->reset_task, igb_reset_task);
  	INIT_WORK(&adapter->watchdog_task, igb_watchdog_task);
  	if (adapter->flags & IGB_FLAG_DETECT_BAD_DMA)
  		INIT_WORK(&adapter->dma_err_task, igb_dma_err_task);
  #endif
  
  	/* Initialize link properties that are user-changeable */
  	adapter->fc_autoneg = true;
  	hw->mac.autoneg = true;
  	hw->phy.autoneg_advertised = 0x2f;
  
  	hw->fc.requested_mode = e1000_fc_default;
  	hw->fc.current_mode = e1000_fc_default;
  
  	e1000_validate_mdi_setting(hw);
  
  	/* By default, support wake on port A */
  	if (hw->bus.func == 0)
  		adapter->flags |= IGB_FLAG_WOL_SUPPORTED;
  
  	/* Check the NVM for wake support for non-port A ports */
  	if (hw->mac.type >= e1000_82580)
  		hw->nvm.ops.read(hw, NVM_INIT_CONTROL3_PORT_A +
  		                 NVM_82580_LAN_FUNC_OFFSET(hw->bus.func), 1,
  		                 &eeprom_data);
  	else if (hw->bus.func == 1)
  		e1000_read_nvm(hw, NVM_INIT_CONTROL3_PORT_B, 1, &eeprom_data);
  
  	if (eeprom_data & IGB_EEPROM_APME)
  		adapter->flags |= IGB_FLAG_WOL_SUPPORTED;
  
  	/* now that we have the eeprom settings, apply the special cases where
  	 * the eeprom may be wrong or the board simply won't support wake on
  	 * lan on a particular port */
  	switch (pdev->device) {
  	case E1000_DEV_ID_82575GB_QUAD_COPPER:
  		adapter->flags &= ~IGB_FLAG_WOL_SUPPORTED;
  		break;
  	case E1000_DEV_ID_82575EB_FIBER_SERDES:
  	case E1000_DEV_ID_82576_FIBER:
  	case E1000_DEV_ID_82576_SERDES:
  		/* Wake events only supported on port A for dual fiber
  		 * regardless of eeprom setting */
  		if (E1000_READ_REG(hw, E1000_STATUS) & E1000_STATUS_FUNC_1)
  			adapter->flags &= ~IGB_FLAG_WOL_SUPPORTED;
  		break;
  	case E1000_DEV_ID_82576_QUAD_COPPER:
  	case E1000_DEV_ID_82576_QUAD_COPPER_ET2:
  		/* if quad port adapter, disable WoL on all but port A */
  		if (global_quad_port_a != 0)
  			adapter->flags &= ~IGB_FLAG_WOL_SUPPORTED;
  		else
  			adapter->flags |= IGB_FLAG_QUAD_PORT_A;
  		/* Reset for multiple quad port adapters */
  		if (++global_quad_port_a == 4)
  			global_quad_port_a = 0;
  		break;
  	default:
  		/* If the device can't wake, don't set software support */
  		if (!device_can_wakeup(&adapter->pdev->dev))
  			adapter->flags &= ~IGB_FLAG_WOL_SUPPORTED;
  		break;
  	}
  
  	/* initialize the wol settings based on the eeprom settings */
  	if (adapter->flags & IGB_FLAG_WOL_SUPPORTED)
  		adapter->wol |= E1000_WUFC_MAG;
  
  	/* Some vendors want WoL disabled by default, but still supported */
  	if ((hw->mac.type == e1000_i350) &&
  	    (pdev->subsystem_vendor == PCI_VENDOR_ID_HP)) {
  		adapter->flags |= IGB_FLAG_WOL_SUPPORTED;
  		adapter->wol = 0;
  	}
  
  #ifdef NO_KNI
  	device_set_wakeup_enable(pci_dev_to_dev(adapter->pdev),
  				 adapter->flags & IGB_FLAG_WOL_SUPPORTED);
  
  	/* reset the hardware with the new settings */
  	igb_reset(adapter);
  	adapter->devrc = 0;
  
  #ifdef HAVE_I2C_SUPPORT
  	/* Init the I2C interface */
  	err = igb_init_i2c(adapter);
  	if (err) {
  		dev_err(&pdev->dev, "failed to init i2c interface\n");
  		goto err_eeprom;
  	}
  #endif /* HAVE_I2C_SUPPORT */
  
  	/* let the f/w know that the h/w is now under the control of the
  	 * driver. */
  	igb_get_hw_control(adapter);
  
  	strncpy(netdev->name, "eth%d", IFNAMSIZ);
  	err = register_netdev(netdev);
  	if (err)
  		goto err_register;
  
  #ifdef CONFIG_IGB_VMDQ_NETDEV
  	err = igb_init_vmdq_netdevs(adapter);
  	if (err)
  		goto err_register;
  #endif
  	/* carrier off reporting is important to ethtool even BEFORE open */
  	netif_carrier_off(netdev);
  
  #ifdef IGB_DCA
  	if (dca_add_requester(&pdev->dev) == E1000_SUCCESS) {
  		adapter->flags |= IGB_FLAG_DCA_ENABLED;
  		dev_info(pci_dev_to_dev(pdev), "DCA enabled\n");
  		igb_setup_dca(adapter);
  	}
  
  #endif
  #ifdef HAVE_PTP_1588_CLOCK
  	/* do hw tstamp init after resetting */
  	igb_ptp_init(adapter);
  #endif /* HAVE_PTP_1588_CLOCK */
  
  #endif /* NO_KNI */
  	dev_info(pci_dev_to_dev(pdev), "Intel(R) Gigabit Ethernet Network Connection\n");
  	/* print bus type/speed/width info */
  	dev_info(pci_dev_to_dev(pdev), "%s: (PCIe:%s:%s) ",
  	         netdev->name,
  	         ((hw->bus.speed == e1000_bus_speed_2500) ? "2.5GT/s" :
  	          (hw->bus.speed == e1000_bus_speed_5000) ? "5.0GT/s" :
  		  (hw->mac.type == e1000_i354) ? "integrated" :
  	                                                    "unknown"),
  	         ((hw->bus.width == e1000_bus_width_pcie_x4) ? "Width x4" :
  	          (hw->bus.width == e1000_bus_width_pcie_x2) ? "Width x2" :
  	          (hw->bus.width == e1000_bus_width_pcie_x1) ? "Width x1" :
  		  (hw->mac.type == e1000_i354) ? "integrated" :
  	           "unknown"));
  	dev_info(pci_dev_to_dev(pdev), "%s: MAC: ", netdev->name);
  	for (i = 0; i < 6; i++)
  		printk("%2.2x%c", netdev->dev_addr[i], i == 5 ? '\n' : ':');
  
  	ret_val = e1000_read_pba_string(hw, pba_str, E1000_PBANUM_LENGTH);
  	if (ret_val)
  		strncpy(pba_str, "Unknown", sizeof(pba_str) - 1);
  	dev_info(pci_dev_to_dev(pdev), "%s: PBA No: %s\n", netdev->name,
  		 pba_str);
  
  
  	/* Initialize the thermal sensor on i350 devices. */
  	if (hw->mac.type == e1000_i350) {
  		if (hw->bus.func == 0) {
  			u16 ets_word;
  
  			/*
  			 * Read the NVM to determine if this i350 device
  			 * supports an external thermal sensor.
  			 */
  			e1000_read_nvm(hw, NVM_ETS_CFG, 1, &ets_word);
  			if (ets_word != 0x0000 && ets_word != 0xFFFF)
  				adapter->ets = true;
  			else
  				adapter->ets = false;
  		}
  #ifdef NO_KNI
  #ifdef IGB_HWMON
  
  		igb_sysfs_init(adapter);
  #else
  #ifdef IGB_PROCFS
  
  		igb_procfs_init(adapter);
  #endif /* IGB_PROCFS */
  #endif /* IGB_HWMON */
  #endif /* NO_KNI */
  	} else {
  		adapter->ets = false;
  	}
  
  	if (hw->phy.media_type == e1000_media_type_copper) {
  		switch (hw->mac.type) {
  		case e1000_i350:
  		case e1000_i210:
  		case e1000_i211:
  			/* Enable EEE for internal copper PHY devices */
  			err = e1000_set_eee_i350(hw);
  			if ((!err) &&
  			    (adapter->flags & IGB_FLAG_EEE))
  				adapter->eee_advert =
  					MDIO_EEE_100TX | MDIO_EEE_1000T;
  			break;
  		case e1000_i354:
  			if ((E1000_READ_REG(hw, E1000_CTRL_EXT)) &
  			    (E1000_CTRL_EXT_LINK_MODE_SGMII)) {
  				err = e1000_set_eee_i354(hw);
  				if ((!err) &&
  				    (adapter->flags & IGB_FLAG_EEE))
  					adapter->eee_advert =
  					   MDIO_EEE_100TX | MDIO_EEE_1000T;
  			}
  			break;
  		default:
  			break;
  		}
  	}
  
  	/* send driver version info to firmware */
  	if (hw->mac.type >= e1000_i350)
  		igb_init_fw(adapter);
  
  #ifndef IGB_NO_LRO
  	if (netdev->features & NETIF_F_LRO)
  		dev_info(pci_dev_to_dev(pdev), "Internal LRO is enabled \n");
  	else
  		dev_info(pci_dev_to_dev(pdev), "LRO is disabled \n");
  #endif
  	dev_info(pci_dev_to_dev(pdev),
  	         "Using %s interrupts. %d rx queue(s), %d tx queue(s)\n",
  	         adapter->msix_entries ? "MSI-X" :
  	         (adapter->flags & IGB_FLAG_HAS_MSI) ? "MSI" : "legacy",
  	         adapter->num_rx_queues, adapter->num_tx_queues);
  
  	cards_found++;
  	*lad_dev = netdev;
  
  	pm_runtime_put_noidle(&pdev->dev);
  	return 0;
  
  //err_register:
  //	igb_release_hw_control(adapter);
  #ifdef HAVE_I2C_SUPPORT
  	memset(&adapter->i2c_adap, 0, sizeof(adapter->i2c_adap));
  #endif /* HAVE_I2C_SUPPORT */
  err_eeprom:
  //	if (!e1000_check_reset_block(hw))
  //		e1000_phy_hw_reset(hw);
  
  	if (hw->flash_address)
  		iounmap(hw->flash_address);
  err_sw_init:
  //	igb_clear_interrupt_scheme(adapter);
  //	igb_reset_sriov_capability(adapter);
  	iounmap(hw->hw_addr);
  err_ioremap:
  	free_netdev(netdev);
  err_alloc_etherdev:
  //	pci_release_selected_regions(pdev,
  //	                             pci_select_bars(pdev, IORESOURCE_MEM));
  //err_pci_reg:
  //err_dma:
  	pci_disable_device(pdev);
  	return err;
  }
  
  
  void igb_kni_remove(struct pci_dev *pdev)
  {
  	pci_disable_device(pdev);
  }
  