/*******************************************************************************

  Intel(R) 10GbE PCI Express Linux Network Driver
  Copyright(c) 1999 - 2018 Intel Corporation.

  This program is free software; you can redistribute it and/or modify it
  under the terms and conditions of the GNU General Public License,
  version 2, as published by the Free Software Foundation.

  This program is distributed in the hope it will be useful, but WITHOUT
  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  more details.

  The full GNU General Public License is included in this distribution in
  the file called "COPYING".

  Contact Information:
  Linux NICS <linux.nics@intel.com>
  e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
  Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497

*******************************************************************************/

/******************************************************************************
 Copyright (c)2006 - 2007 Myricom, Inc. for some LRO specific code
******************************************************************************/
#include <linux/types.h>
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/netdevice.h>
#include <linux/vmalloc.h>
#include <linux/highmem.h>
#include <linux/string.h>
#include <linux/in.h>
#include <linux/ip.h>
#include <linux/tcp.h>
#include <linux/pkt_sched.h>
#include <linux/ipv6.h>
#ifdef NETIF_F_TSO
#include <net/checksum.h>
#ifdef NETIF_F_TSO6
#include <net/ipv6.h>
#include <net/ip6_checksum.h>
#endif /* NETIF_F_TSO6 */
#endif /* NETIF_F_TSO */
#ifdef SIOCETHTOOL
#include <linux/ethtool.h>
#endif

#include <linux/if_bridge.h>
#include "ixgbe.h"
#ifdef HAVE_UDP_ENC_RX_OFFLOAD
#include <net/vxlan.h>
#include <net/udp_tunnel.h>
#endif /* HAVE_UDP_ENC_RX_OFFLOAD */
#ifdef HAVE_VXLAN_RX_OFFLOAD
#include <net/vxlan.h>
#endif /* HAVE_VXLAN_RX_OFFLOAD */

#include "ixgbe_dcb_82599.h"
#include "ixgbe_sriov.h"

#define DRV_HW_PERF

#define FPGA

#define DRIVERIOV

#define BYPASS_TAG

#define RELEASE_TAG

#define DRV_VERSION	"5.3.6" \
			DRIVERIOV DRV_HW_PERF FPGA \
			BYPASS_TAG RELEASE_TAG
#define DRV_SUMMARY	"Intel(R) 10GbE PCI Express Linux Network Driver"
const char ixgbe_driver_version[] = DRV_VERSION;
#ifdef HAVE_NON_CONST_PCI_DRIVER_NAME
char ixgbe_driver_name[] = "ixgbe";
#else
const char ixgbe_driver_name[] = "ixgbe";
#endif
static const char ixgbe_driver_string[] = DRV_SUMMARY;
static const char ixgbe_copyright[] = "Copyright(c) 1999 - 2018 Intel Corporation.";
static const char ixgbe_overheat_msg[] =
		"Network adapter has been stopped because it has over heated. "
		"Restart the computer. If the problem persists, "
		"power off the system and replace the adapter";

/* ixgbe_pci_tbl - PCI Device ID Table
 *
 * Wildcard entries (PCI_ANY_ID) should come last
 * Last entry must be all 0s
 *
 * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
 *   Class, Class Mask, private data (not used) }
 */
static const struct pci_device_id ixgbe_pci_tbl[] = {
	{PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598), 0},
	{PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AF_DUAL_PORT), 0},
	{PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AF_SINGLE_PORT), 0},
	{PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AT), 0},
	{PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AT2), 0},
	{PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598EB_CX4), 0},
	{PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598_CX4_DUAL_PORT), 0},
	{PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598_DA_DUAL_PORT), 0},
	{PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598_SR_DUAL_PORT_EM), 0},
	{PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598EB_XF_LR), 0},
	{PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598EB_SFP_LOM), 0},
	{PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598_BX), 0},
	{PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_KX4), 0},
	{PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_XAUI_LOM), 0},
	{PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_KR), 0},
	{PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_SFP), 0},
	{PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_SFP_EM), 0},
	{PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_KX4_MEZZ), 0},
	{PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_CX4), 0},
	{PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_BACKPLANE_FCOE), 0},
	{PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_SFP_FCOE), 0},
	{PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_T3_LOM), 0},
	{PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_COMBO_BACKPLANE), 0},
	{PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X540T), 0},
	{PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_SFP_SF2), 0},
	{PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_LS), 0},
	{PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599EN_SFP), 0},
	{PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_SFP_SF_QP), 0},
	{PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_QSFP_SF_QP), 0},
	{PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X540T1), 0},
	{PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X550T), 0},
	{PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X550T1), 0},
	{PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X550EM_X_KX4), 0},
	{PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X550EM_X_XFI), 0},
	{PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X550EM_X_KR), 0},
	{PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X550EM_X_SFP), 0},
	{PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X550EM_X_10G_T), 0},
	{PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X550EM_X_1G_T), 0},
	{PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X550EM_A_KR), 0},
	{PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X550EM_A_KR_L), 0},
	{PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X550EM_A_SFP_N), 0},
	{PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X550EM_A_SGMII), 0},
	{PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X550EM_A_SGMII_L), 0},
	{PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X550EM_A_10G_T), 0},
	{PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X550EM_A_QSFP), 0},
	{PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X550EM_A_QSFP_N), 0},
	{PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X550EM_A_SFP), 0},
	{PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X550EM_A_1G_T), 0},
	{PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X550EM_A_1G_T_L), 0},
	/* required last entry */
	{ .device = 0 }
};
MODULE_DEVICE_TABLE(pci, ixgbe_pci_tbl);

#if IS_ENABLED(CONFIG_DCA)
static int ixgbe_notify_dca(struct notifier_block *, unsigned long event,
			    void *p);
static struct notifier_block dca_notifier = {
	.notifier_call	= ixgbe_notify_dca,
	.next		= NULL,
	.priority	= 0
};
#endif /* CONFIG_DCA */
static void ixgbe_watchdog_link_is_down(struct ixgbe_adapter *);

MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
MODULE_DESCRIPTION(DRV_SUMMARY);
MODULE_LICENSE("GPL");
MODULE_VERSION(DRV_VERSION);

#define DEFAULT_DEBUG_LEVEL_SHIFT 3

static struct workqueue_struct *ixgbe_wq;

static bool ixgbe_is_sfp(struct ixgbe_hw *hw);
static bool ixgbe_check_cfg_remove(struct ixgbe_hw *hw, struct pci_dev *pdev);

static int ixgbe_read_pci_cfg_word_parent(struct ixgbe_hw *hw,
					  u32 reg, u16 *value)
{
	struct ixgbe_adapter *adapter = hw->back;
	struct pci_dev *parent_dev;
	struct pci_bus *parent_bus;
	int pos;

	parent_bus = adapter->pdev->bus->parent;
	if (!parent_bus)
		return IXGBE_ERR_FEATURE_NOT_SUPPORTED;

	parent_dev = parent_bus->self;
	if (!parent_dev)
		return IXGBE_ERR_FEATURE_NOT_SUPPORTED;

	pos = pci_find_capability(parent_dev, PCI_CAP_ID_EXP);
	if (!pos)
		return IXGBE_ERR_FEATURE_NOT_SUPPORTED;

	pci_read_config_word(parent_dev, pos + reg, value);
	if (*value == IXGBE_FAILED_READ_CFG_WORD &&
	    ixgbe_check_cfg_remove(hw, parent_dev))
		return IXGBE_ERR_FEATURE_NOT_SUPPORTED;
	return IXGBE_SUCCESS;
}

/**
 *  ixgbe_get_parent_bus_info - Set PCI bus info beyond switch
 *  @hw: pointer to hardware structure
 *
 *  Sets the PCI bus info (speed, width, type) within the ixgbe_hw structure
 *  when the device is behind a switch.
 **/
static s32 ixgbe_get_parent_bus_info(struct ixgbe_hw *hw)
{
	u16 link_status = 0;
	int err;

	hw->bus.type = ixgbe_bus_type_pci_express;

	/* Get the negotiated link width and speed from PCI config space of the
	 * parent, as this device is behind a switch
	 */
	err = ixgbe_read_pci_cfg_word_parent(hw, 18, &link_status);

	/* If the read fails, fallback to default */
	if (err)
		link_status = IXGBE_READ_PCIE_WORD(hw, IXGBE_PCI_LINK_STATUS);

	ixgbe_set_pci_config_data_generic(hw, link_status);

	return IXGBE_SUCCESS;
}

/**
 * ixgbe_check_from_parent - determine whether to use parent for PCIe info
 * @hw: hw specific details
 *
 * This function is used by probe to determine whether a device's PCIe info
 * (speed, width, etc) should be obtained from the parent bus or directly. This
 * is useful for specialized device configurations containing PCIe bridges.
 */
static inline bool ixgbe_pcie_from_parent(struct ixgbe_hw *hw)
{
	switch (hw->device_id) {
	case IXGBE_DEV_ID_82599_QSFP_SF_QP:
	case IXGBE_DEV_ID_82599_SFP_SF_QP:
		return true;
	default:
		return false;
	}
}

static void ixgbe_check_minimum_link(struct ixgbe_adapter *adapter,
				     int expected_gts)
{
	struct ixgbe_hw *hw = &adapter->hw;
	int max_gts = 0;
	enum pci_bus_speed speed = PCI_SPEED_UNKNOWN;
	enum pcie_link_width width = PCIE_LNK_WIDTH_UNKNOWN;
	struct pci_dev *pdev;

	/* Some devices are not connected over PCIe and thus do not negotiate
	 * speed. These devices do not have valid bus info, and thus any report
	 * we generate may not be correct.
	 */
	if (hw->bus.type == ixgbe_bus_type_internal)
		return;

	/* determine whether to use the parent device */
	if (ixgbe_pcie_from_parent(&adapter->hw))
		pdev = adapter->pdev->bus->parent->self;
	else
		pdev = adapter->pdev;

	if (pcie_get_minimum_link(pdev, &speed, &width) ||
	    speed == PCI_SPEED_UNKNOWN || width == PCIE_LNK_WIDTH_UNKNOWN) {
		e_dev_warn("Unable to determine PCI Express bandwidth.\n");
		return;
	}

	switch (speed) {
	case PCIE_SPEED_2_5GT:
		/* 8b/10b encoding reduces max throughput by 20% */
		max_gts = 2 * width;
		break;
	case PCIE_SPEED_5_0GT:
		/* 8b/10b encoding reduces max throughput by 20% */
		max_gts = 4 * width;
		break;
	case PCIE_SPEED_8_0GT:
		/* 128b/130b encoding has less than 2% impact on throughput */
		max_gts = 8 * width;
		break;
	default:
		e_dev_warn("Unable to determine PCI Express bandwidth.\n");
		return;
	}

	e_dev_info("PCI Express bandwidth of %dGT/s available\n",
		   max_gts);
	e_dev_info("(Speed:%s, Width: x%d, Encoding Loss:%s)\n",
		   (speed == PCIE_SPEED_8_0GT ? "8.0GT/s" :
		    speed == PCIE_SPEED_5_0GT ? "5.0GT/s" :
		    speed == PCIE_SPEED_2_5GT ? "2.5GT/s" :
		    "Unknown"),
		   hw->bus.width,
		   (speed == PCIE_SPEED_2_5GT ? "20%" :
		    speed == PCIE_SPEED_5_0GT ? "20%" :
		    speed == PCIE_SPEED_8_0GT ? "<2%" :
		    "Unknown"));

	if (max_gts < expected_gts) {
		e_dev_warn("This is not sufficient for optimal performance of this card.\n");
		e_dev_warn("For optimal performance, at least %dGT/s of bandwidth is required.\n",
			expected_gts);
		e_dev_warn("A slot with more lanes and/or higher speed is suggested.\n");
	}
}

/**
 * ixgbe_enumerate_functions - Get the number of ports this device has
 * @adapter: adapter structure
 *
 * This function enumerates the phsyical functions co-located on a single slot,
 * in order to determine how many ports a device has. This is most useful in
 * determining the required GT/s of PCIe bandwidth necessary for optimal
 * performance.
 **/
static inline int ixgbe_enumerate_functions(struct ixgbe_adapter *adapter)
{
	struct pci_dev *entry, *pdev = adapter->pdev;
	int physfns = 0;

	/* Some cards can not use the generic count PCIe functions method,
	 * because they are behind a parent switch, so we hardcode these to
	 * correct number of ports.
	 */
	if (ixgbe_pcie_from_parent(&adapter->hw)) {
		physfns = 4;
	} else {
		list_for_each_entry(entry, &pdev->bus->devices, bus_list) {
#ifdef CONFIG_PCI_IOV
			/* don't count virtual functions */
			if (entry->is_virtfn)
				continue;
#endif

			/* When the devices on the bus don't all match our device ID,
			 * we can't reliably determine the correct number of
			 * functions. This can occur if a function has been direct 
			 * attached to a virtual machine using VT-d, for example. In
			 * this case, simply return -1 to indicate this.
			 */
			if ((entry->vendor != pdev->vendor) ||
			    (entry->device != pdev->device))
				return -1;

			physfns++;
		}
	}

	return physfns;
}

static void ixgbe_service_event_schedule(struct ixgbe_adapter *adapter)
{
	if (!test_bit(__IXGBE_DOWN, &adapter->state) &&
	    !test_bit(__IXGBE_REMOVE, &adapter->state) &&
	    !test_and_set_bit(__IXGBE_SERVICE_SCHED, &adapter->state))
		queue_work(ixgbe_wq, &adapter->service_task);
}

static void ixgbe_service_event_complete(struct ixgbe_adapter *adapter)
{
	BUG_ON(!test_bit(__IXGBE_SERVICE_SCHED, &adapter->state));

	/* flush memory to make sure state is correct before next watchog */
	smp_mb__before_atomic();
	clear_bit(__IXGBE_SERVICE_SCHED, &adapter->state);
}

static void ixgbe_remove_adapter(struct ixgbe_hw *hw)
{
	struct ixgbe_adapter *adapter = hw->back;

	if (!hw->hw_addr)
		return;
	hw->hw_addr = NULL;
	e_dev_err("Adapter removed\n");
	if (test_bit(__IXGBE_SERVICE_INITED, &adapter->state))
		ixgbe_service_event_schedule(adapter);
}

static void ixgbe_check_remove(struct ixgbe_hw *hw, u32 reg)
{
	u32 value;

	/* The following check not only optimizes a bit by not
	 * performing a read on the status register when the
	 * register just read was a status register read that
	 * returned IXGBE_FAILED_READ_REG. It also blocks any
	 * potential recursion.
	 */
	if (reg == IXGBE_STATUS) {
		ixgbe_remove_adapter(hw);
		return;
	}
	value = IXGBE_READ_REG(hw, IXGBE_STATUS);
	if (value == IXGBE_FAILED_READ_REG)
		ixgbe_remove_adapter(hw);
}

static u32
ixgbe_validate_register_read(struct ixgbe_hw *_hw, u32 reg, bool quiet)
{
	int i;
	u32 value;
	u8 __iomem *reg_addr;
	struct ixgbe_adapter *adapter = _hw->back;

	reg_addr = READ_ONCE(_hw->hw_addr);
	if (IXGBE_REMOVED(reg_addr))
		return IXGBE_FAILED_READ_REG;
	for (i = 0; i < IXGBE_DEAD_READ_RETRIES; ++i) {
		value = readl(reg_addr + reg);
		if (value != IXGBE_DEAD_READ_REG)
			break;
	}
	if (quiet)
		return value;
	if (value == IXGBE_DEAD_READ_REG)
		e_err(drv, "%s: register %x read unchanged\n", __func__, reg);
	else
		e_warn(hw, "%s: register %x read recovered after %d retries\n",
			__func__, reg, i + 1);
	return value;
}

u32 ixgbe_read_reg(struct ixgbe_hw *hw, u32 reg, bool quiet)
{
	u32 value;
	u8 __iomem *reg_addr;

	reg_addr = READ_ONCE(hw->hw_addr);
	if (IXGBE_REMOVED(reg_addr))
		return IXGBE_FAILED_READ_REG;
	if (unlikely(hw->phy.nw_mng_if_sel &
		     IXGBE_NW_MNG_IF_SEL_SGMII_ENABLE)) {
		struct ixgbe_adapter *adapter;
		int i;

		for (i = 0; i < 200; ++i) {
			value = readl(reg_addr + IXGBE_MAC_SGMII_BUSY);
			if (likely(!value))
				goto writes_completed;
			if (value == IXGBE_FAILED_READ_REG) {
				ixgbe_remove_adapter(hw);
				return IXGBE_FAILED_READ_REG;
			}
			udelay(5);
		}

		adapter = hw->back;
		e_warn(hw, "register writes incomplete %08x\n", value);
	}

writes_completed:
	value = readl(reg_addr + reg);
	if (unlikely(value == IXGBE_FAILED_READ_REG))
		ixgbe_check_remove(hw, reg);
	if (unlikely(value == IXGBE_DEAD_READ_REG))
		value = ixgbe_validate_register_read(hw, reg, quiet);
	return value;
}

static void ixgbe_release_hw_control(struct ixgbe_adapter *adapter)
{
	u32 ctrl_ext;

	/* Let firmware take over control of h/w */
	ctrl_ext = IXGBE_READ_REG(&adapter->hw, IXGBE_CTRL_EXT);
	IXGBE_WRITE_REG(&adapter->hw, IXGBE_CTRL_EXT,
			ctrl_ext & ~IXGBE_CTRL_EXT_DRV_LOAD);
}

static void ixgbe_get_hw_control(struct ixgbe_adapter *adapter)
{
	u32 ctrl_ext;

	/* Let firmware know the driver has taken over */
	ctrl_ext = IXGBE_READ_REG(&adapter->hw, IXGBE_CTRL_EXT);
	IXGBE_WRITE_REG(&adapter->hw, IXGBE_CTRL_EXT,
			ctrl_ext | IXGBE_CTRL_EXT_DRV_LOAD);
}

/*
 * ixgbe_set_ivar - set the IVAR registers, mapping interrupt causes to vectors
 * @adapter: pointer to adapter struct
 * @direction: 0 for Rx, 1 for Tx, -1 for other causes
 * @queue: queue to map the corresponding interrupt to
 * @msix_vector: the vector to map to the corresponding queue
 *
 */
static void ixgbe_set_ivar(struct ixgbe_adapter *adapter, s8 direction,
			   u8 queue, u8 msix_vector)
{
	u32 ivar, index;
	struct ixgbe_hw *hw = &adapter->hw;
	switch (hw->mac.type) {
	case ixgbe_mac_82598EB:
		msix_vector |= IXGBE_IVAR_ALLOC_VAL;
		if (direction == -1)
			direction = 0;
		index = (((direction * 64) + queue) >> 2) & 0x1F;
		ivar = IXGBE_READ_REG(hw, IXGBE_IVAR(index));
		ivar &= ~(0xFF << (8 * (queue & 0x3)));
		ivar |= (msix_vector << (8 * (queue & 0x3)));
		IXGBE_WRITE_REG(hw, IXGBE_IVAR(index), ivar);
		break;
	case ixgbe_mac_82599EB:
	case ixgbe_mac_X540:
	case ixgbe_mac_X550:
	case ixgbe_mac_X550EM_x:
	case ixgbe_mac_X550EM_a:
		if (direction == -1) {
			/* other causes */
			msix_vector |= IXGBE_IVAR_ALLOC_VAL;
			index = ((queue & 1) * 8);
			ivar = IXGBE_READ_REG(&adapter->hw, IXGBE_IVAR_MISC);
			ivar &= ~(0xFF << index);
			ivar |= (msix_vector << index);
			IXGBE_WRITE_REG(&adapter->hw, IXGBE_IVAR_MISC, ivar);
			break;
		} else {
			/* tx or rx causes */
			msix_vector |= IXGBE_IVAR_ALLOC_VAL;
			index = ((16 * (queue & 1)) + (8 * direction));
			ivar = IXGBE_READ_REG(hw, IXGBE_IVAR(queue >> 1));
			ivar &= ~(0xFF << index);
			ivar |= (msix_vector << index);
			IXGBE_WRITE_REG(hw, IXGBE_IVAR(queue >> 1), ivar);
			break;
		}
	default:
		break;
	}
}

static inline void ixgbe_irq_rearm_queues(struct ixgbe_adapter *adapter,
					  u64 qmask)
{
	u32 mask;

	switch (adapter->hw.mac.type) {
	case ixgbe_mac_82598EB:
		mask = (IXGBE_EIMS_RTX_QUEUE & qmask);
		IXGBE_WRITE_REG(&adapter->hw, IXGBE_EICS, mask);
		break;
	case ixgbe_mac_82599EB:
	case ixgbe_mac_X540:
	case ixgbe_mac_X550:
	case ixgbe_mac_X550EM_x:
	case ixgbe_mac_X550EM_a:
		mask = (qmask & 0xFFFFFFFF);
		IXGBE_WRITE_REG(&adapter->hw, IXGBE_EICS_EX(0), mask);
		mask = (qmask >> 32);
		IXGBE_WRITE_REG(&adapter->hw, IXGBE_EICS_EX(1), mask);
		break;
	default:
		break;
	}
}

static void ixgbe_update_xoff_rx_lfc(struct ixgbe_adapter *adapter)
{
	struct ixgbe_hw *hw = &adapter->hw;
	struct ixgbe_hw_stats *hwstats = &adapter->stats;
	int i;
	u32 data;

	if ((hw->fc.current_mode != ixgbe_fc_full) &&
	    (hw->fc.current_mode != ixgbe_fc_rx_pause))
		return;

	switch (hw->mac.type) {
	case ixgbe_mac_82598EB:
		data = IXGBE_READ_REG(hw, IXGBE_LXOFFRXC);
		break;
	default:
		data = IXGBE_READ_REG(hw, IXGBE_LXOFFRXCNT);
	}
	hwstats->lxoffrxc += data;

	/* refill credits (no tx hang) if we received xoff */
	if (!data)
		return;

	for (i = 0; i < adapter->num_tx_queues; i++)
		clear_bit(__IXGBE_HANG_CHECK_ARMED,
			  &adapter->tx_ring[i]->state);
}

static void ixgbe_update_xoff_received(struct ixgbe_adapter *adapter)
{
	struct ixgbe_hw *hw = &adapter->hw;
	struct ixgbe_hw_stats *hwstats = &adapter->stats;
	u32 xoff[8] = {0};
	int i;
	bool pfc_en = adapter->dcb_cfg.pfc_mode_enable;

#ifdef HAVE_DCBNL_IEEE
	if (adapter->ixgbe_ieee_pfc)
		pfc_en |= !!(adapter->ixgbe_ieee_pfc->pfc_en);

#endif
	if (!(adapter->flags & IXGBE_FLAG_DCB_ENABLED) || !pfc_en) {
		ixgbe_update_xoff_rx_lfc(adapter);
		return;
	}

	/* update stats for each tc, only valid with PFC enabled */
	for (i = 0; i < MAX_TX_PACKET_BUFFERS; i++) {
		switch (hw->mac.type) {
		case ixgbe_mac_82598EB:
			xoff[i] = IXGBE_READ_REG(hw, IXGBE_PXOFFRXC(i));
			break;
		default:
			xoff[i] = IXGBE_READ_REG(hw, IXGBE_PXOFFRXCNT(i));
		}
		hwstats->pxoffrxc[i] += xoff[i];
	}

	/* disarm tx queues that have received xoff frames */
	for (i = 0; i < adapter->num_tx_queues; i++) {
		struct ixgbe_ring *tx_ring = adapter->tx_ring[i];
		u8 tc = tx_ring->dcb_tc;

		if ((tc <= 7) && (xoff[tc]))
			clear_bit(__IXGBE_HANG_CHECK_ARMED, &tx_ring->state);
	}
}

static u64 ixgbe_get_tx_completed(struct ixgbe_ring *ring)
{
	return ring->stats.packets;
}

static u64 ixgbe_get_tx_pending(struct ixgbe_ring *ring)
{
	struct ixgbe_adapter *adapter = ring->q_vector->adapter;
	struct ixgbe_hw *hw;
	u32 head, tail;

	hw = &adapter->hw;
	head = IXGBE_READ_REG(hw, IXGBE_TDH(ring->reg_idx));
	tail = IXGBE_READ_REG(hw, IXGBE_TDT(ring->reg_idx));

	return ((head <= tail) ? tail : tail + ring->count) - head;
}

static bool ixgbe_check_tx_hang(struct ixgbe_ring *tx_ring)
{
	u32 tx_done = ixgbe_get_tx_completed(tx_ring);
	u32 tx_done_old = tx_ring->tx_stats.tx_done_old;
	u32 tx_pending = ixgbe_get_tx_pending(tx_ring);
	bool ret = false;

	clear_check_for_tx_hang(tx_ring);

	/*
	 * Check for a hung queue, but be thorough. This verifies
	 * that a transmit has been completed since the previous
	 * check AND there is at least one packet pending. The
	 * ARMED bit is set to indicate a potential hang. The
	 * bit is cleared if a pause frame is received to remove
	 * false hang detection due to PFC or 802.3x frames. By
	 * requiring this to fail twice we avoid races with
	 * PFC clearing the ARMED bit and conditions where we
	 * run the check_tx_hang logic with a transmit completion
	 * pending but without time to complete it yet.
	 */
	if ((tx_done_old == tx_done) && tx_pending) {
		/* make sure it is true for two checks in a row */
		ret = test_and_set_bit(__IXGBE_HANG_CHECK_ARMED,
				       &tx_ring->state);
	} else {
		/* update completed stats and continue */
		tx_ring->tx_stats.tx_done_old = tx_done;
		/* reset the countdown */
		clear_bit(__IXGBE_HANG_CHECK_ARMED, &tx_ring->state);
	}

	return ret;
}

/**
 * ixgbe_tx_timeout_reset - initiate reset due to Tx timeout
 * @adapter: driver private struct
 **/
static void ixgbe_tx_timeout_reset(struct ixgbe_adapter *adapter)
{

	/* Do the reset outside of interrupt context */
	if (!test_bit(__IXGBE_DOWN, &adapter->state)) {
		set_bit(__IXGBE_RESET_REQUESTED, &adapter->state);
		ixgbe_service_event_schedule(adapter);
	}
}

/**
 * ixgbe_tx_timeout - Respond to a Tx Hang
 * @netdev: network interface device structure
 **/
static void ixgbe_tx_timeout(struct net_device *netdev)
{
struct ixgbe_adapter *adapter = netdev_priv(netdev);
	bool real_tx_hang = false;
	int i;

#define TX_TIMEO_LIMIT 16000
	for (i = 0; i < adapter->num_tx_queues; i++) {
		struct ixgbe_ring *tx_ring = adapter->tx_ring[i];
		if (check_for_tx_hang(tx_ring) && ixgbe_check_tx_hang(tx_ring))
			real_tx_hang = true;
	}

	if (real_tx_hang) {
		ixgbe_tx_timeout_reset(adapter);
	} else {
		e_info(drv, "Fake Tx hang detected with timeout of %d "
			"seconds\n", netdev->watchdog_timeo/HZ);

		/* fake Tx hang - increase the kernel timeout */
		if (netdev->watchdog_timeo < TX_TIMEO_LIMIT)
			netdev->watchdog_timeo *= 2;
	}
}

/**
 * ixgbe_clean_tx_irq - Reclaim resources after transmit completes
 * @q_vector: structure containing interrupt and ring information
 * @tx_ring: tx ring to clean
 **/
static bool ixgbe_clean_tx_irq(struct ixgbe_q_vector *q_vector,
			       struct ixgbe_ring *tx_ring)
{
	struct ixgbe_adapter *adapter = q_vector->adapter;
	struct ixgbe_tx_buffer *tx_buffer;
	union ixgbe_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(__IXGBE_DOWN, &adapter->state))
		return true;

	tx_buffer = &tx_ring->tx_buffer_info[i];
	tx_desc = IXGBE_TX_DESC(tx_ring, i);
	i -= tx_ring->count;

	do {
		union ixgbe_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(IXGBE_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 */
		dma_unmap_len_set(tx_buffer, len, 0);

		/* 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 = IXGBE_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 = IXGBE_TX_DESC(tx_ring, 0);
		}

		/* issue prefetch for next Tx descriptor */
		prefetch(tx_desc);

		/* update budget accounting */
		budget--;
	} while (likely(budget));

	i += tx_ring->count;
	tx_ring->next_to_clean = i;
	u64_stats_update_begin(&tx_ring->syncp);
	tx_ring->stats.bytes += total_bytes;
	tx_ring->stats.packets += total_packets;
	u64_stats_update_end(&tx_ring->syncp);
	q_vector->tx.total_bytes += total_bytes;
	q_vector->tx.total_packets += total_packets;

	if (check_for_tx_hang(tx_ring) && ixgbe_check_tx_hang(tx_ring)) {
		/* schedule immediate reset if we believe we hung */
		struct ixgbe_hw *hw = &adapter->hw;
		e_err(drv, "Detected Tx Unit Hang\n"
			"  Tx Queue             <%d>\n"
			"  TDH, TDT             <%x>, <%x>\n"
			"  next_to_use          <%x>\n"
			"  next_to_clean        <%x>\n",
			tx_ring->queue_index,
			IXGBE_READ_REG(hw, IXGBE_TDH(tx_ring->reg_idx)),
			IXGBE_READ_REG(hw, IXGBE_TDT(tx_ring->reg_idx)),
			tx_ring->next_to_use, i);
		e_err(drv, "tx_buffer_info[next_to_clean]\n"
			"  time_stamp           <%lx>\n"
			"  jiffies              <%lx>\n",
			tx_ring->tx_buffer_info[i].time_stamp, jiffies);

		netif_stop_subqueue(netdev_ring(tx_ring),
				    ring_queue_index(tx_ring));

		e_info(probe,
		       "tx hang %d detected on queue %d, resetting adapter\n",
		       adapter->tx_timeout_count + 1, tx_ring->queue_index);

		ixgbe_tx_timeout_reset(adapter);

		/* the adapter is about to reset, no point in enabling stuff */
		return true;
	}

	netdev_tx_completed_queue(txring_txq(tx_ring),
				  total_packets, total_bytes);

#define TX_WAKE_THRESHOLD (DESC_NEEDED * 2)
	if (unlikely(total_packets && netif_carrier_ok(netdev_ring(tx_ring)) &&
		     (ixgbe_desc_unused(tx_ring) >= TX_WAKE_THRESHOLD))) {
		/* Make sure that anybody stopping the queue after this
		 * sees the new next_to_clean.
		 */
		smp_mb();
#ifdef HAVE_TX_MQ
		if (__netif_subqueue_stopped(netdev_ring(tx_ring),
					     ring_queue_index(tx_ring))
		    && !test_bit(__IXGBE_DOWN, &q_vector->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(__IXGBE_DOWN, &q_vector->adapter->state)) {
			netif_wake_queue(netdev_ring(tx_ring));
			++tx_ring->tx_stats.restart_queue;
		}
#endif
	}

	return !!budget;
}

#if IS_ENABLED(CONFIG_DCA)
static void ixgbe_update_tx_dca(struct ixgbe_adapter *adapter,
				struct ixgbe_ring *tx_ring,
				int cpu)
{
	struct ixgbe_hw *hw = &adapter->hw;
	u32 txctrl = 0;
	u16 reg_offset;

	if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
		txctrl = dca3_get_tag(tx_ring->dev, cpu);

	switch (hw->mac.type) {
	case ixgbe_mac_82598EB:
		reg_offset = IXGBE_DCA_TXCTRL(tx_ring->reg_idx);
		break;
	case ixgbe_mac_82599EB:
	case ixgbe_mac_X540:
		reg_offset = IXGBE_DCA_TXCTRL_82599(tx_ring->reg_idx);
		txctrl <<= IXGBE_DCA_TXCTRL_CPUID_SHIFT_82599;
		break;
	default:
		/* for unknown hardware do not write register */
		return;
	}

	/*
	 * 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 |= IXGBE_DCA_TXCTRL_DESC_RRO_EN |
		  IXGBE_DCA_TXCTRL_DATA_RRO_EN |
		  IXGBE_DCA_TXCTRL_DESC_DCA_EN;

	IXGBE_WRITE_REG(hw, reg_offset, txctrl);
}

static void ixgbe_update_rx_dca(struct ixgbe_adapter *adapter,
				struct ixgbe_ring *rx_ring,
				int cpu)
{
	struct ixgbe_hw *hw = &adapter->hw;
	u32 rxctrl = 0;
	u8 reg_idx = rx_ring->reg_idx;

	if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
		rxctrl = dca3_get_tag(rx_ring->dev, cpu);

	switch (hw->mac.type) {
	case ixgbe_mac_82599EB:
	case ixgbe_mac_X540:
		rxctrl <<= IXGBE_DCA_RXCTRL_CPUID_SHIFT_82599;
		break;
	default:
		break;
	}

	/*
	 * 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 |= IXGBE_DCA_RXCTRL_DESC_RRO_EN |
		  IXGBE_DCA_RXCTRL_DATA_DCA_EN |
		  IXGBE_DCA_RXCTRL_DESC_DCA_EN;

	IXGBE_WRITE_REG(hw, IXGBE_DCA_RXCTRL(reg_idx), rxctrl);
}

static void ixgbe_update_dca(struct ixgbe_q_vector *q_vector)
{
	struct ixgbe_adapter *adapter = q_vector->adapter;
	struct ixgbe_ring *ring;
	int cpu = get_cpu();

	if (q_vector->cpu == cpu)
		goto out_no_update;

	ixgbe_for_each_ring(ring, q_vector->tx)
		ixgbe_update_tx_dca(adapter, ring, cpu);

	ixgbe_for_each_ring(ring, q_vector->rx)
		ixgbe_update_rx_dca(adapter, ring, cpu);

	q_vector->cpu = cpu;
out_no_update:
	put_cpu();
}

static void ixgbe_setup_dca(struct ixgbe_adapter *adapter)
{
	int v_idx;

	/* always use CB2 mode, difference is masked in the CB driver */
	if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
		IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_CTRL,
				IXGBE_DCA_CTRL_DCA_MODE_CB2);
	else
		IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_CTRL,
				IXGBE_DCA_CTRL_DCA_DISABLE);

	for (v_idx = 0; v_idx < adapter->num_q_vectors; v_idx++) {
		adapter->q_vector[v_idx]->cpu = -1;
		ixgbe_update_dca(adapter->q_vector[v_idx]);
	}
}

static int __ixgbe_notify_dca(struct device *dev, void *data)
{
	struct ixgbe_adapter *adapter = dev_get_drvdata(dev);
	unsigned long event = *(unsigned long *)data;

	if (!(adapter->flags & IXGBE_FLAG_DCA_CAPABLE))
		return 0;

	switch (event) {
	case DCA_PROVIDER_ADD:
		/* if we're already enabled, don't do it again */
		if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
			break;
		if (dca_add_requester(dev) == IXGBE_SUCCESS) {
			adapter->flags |= IXGBE_FLAG_DCA_ENABLED;
			IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_CTRL, 2);
			break;
		}
		/* fall through - DCA is disabled */
	case DCA_PROVIDER_REMOVE:
		if (adapter->flags & IXGBE_FLAG_DCA_ENABLED) {
			dca_remove_requester(dev);
			adapter->flags &= ~IXGBE_FLAG_DCA_ENABLED;
			IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_CTRL, 1);
		}
		break;
	}

	return IXGBE_SUCCESS;
}
#endif /* CONFIG_DCA */

#ifdef NETIF_F_RXHASH
#define IXGBE_RSS_L4_TYPES_MASK \
	((1ul << IXGBE_RXDADV_RSSTYPE_IPV4_TCP) | \
	 (1ul << IXGBE_RXDADV_RSSTYPE_IPV4_UDP) | \
	 (1ul << IXGBE_RXDADV_RSSTYPE_IPV6_TCP) | \
	 (1ul << IXGBE_RXDADV_RSSTYPE_IPV6_UDP) | \
	 (1ul << IXGBE_RXDADV_RSSTYPE_IPV6_TCP_EX) | \
	 (1ul << IXGBE_RXDADV_RSSTYPE_IPV6_UDP_EX))

static inline void ixgbe_rx_hash(struct ixgbe_ring *ring,
				 union ixgbe_adv_rx_desc *rx_desc,
				 struct sk_buff *skb)
{
	u16 rss_type; 

	if (!(netdev_ring(ring)->features & NETIF_F_RXHASH))
		return;

	rss_type = le16_to_cpu(rx_desc->wb.lower.lo_dword.hs_rss.pkt_info) &
		   IXGBE_RXDADV_RSSTYPE_MASK;

	if (!rss_type)
		return;

	skb_set_hash(skb, le32_to_cpu(rx_desc->wb.lower.hi_dword.rss),
		     (IXGBE_RSS_L4_TYPES_MASK & (1ul << rss_type)) ?
		     PKT_HASH_TYPE_L4 : PKT_HASH_TYPE_L3);
}
#endif /* NETIF_F_RXHASH */

#if IS_ENABLED(CONFIG_FCOE)
/**
 * ixgbe_rx_is_fcoe - check the rx desc for incoming pkt type
 * @ring: structure containing ring specific data
 * @rx_desc: advanced rx descriptor
 *
 * Returns : true if it is FCoE pkt
 */
static inline bool ixgbe_rx_is_fcoe(struct ixgbe_ring *ring,
				    union ixgbe_adv_rx_desc *rx_desc)
{
	__le16 pkt_info = rx_desc->wb.lower.lo_dword.hs_rss.pkt_info;

	return test_bit(__IXGBE_RX_FCOE, &ring->state) &&
	       ((pkt_info & cpu_to_le16(IXGBE_RXDADV_PKTTYPE_ETQF_MASK)) ==
		(cpu_to_le16(IXGBE_ETQF_FILTER_FCOE <<
			     IXGBE_RXDADV_PKTTYPE_ETQF_SHIFT)));
}
#endif /* CONFIG_FCOE */

/**
 * ixgbe_rx_checksum - indicate in skb if hw indicated a good cksum
 * @ring: structure containing ring specific data
 * @rx_desc: current Rx descriptor being processed
 * @skb: skb currently being received and modified
 **/
static inline void ixgbe_rx_checksum(struct ixgbe_ring *ring,
				     union ixgbe_adv_rx_desc *rx_desc,
				     struct sk_buff *skb)
{
	__le16 pkt_info = rx_desc->wb.lower.lo_dword.hs_rss.pkt_info;
	bool encap_pkt = false;

	skb_checksum_none_assert(skb);

	/* Rx csum disabled */
	if (!(netdev_ring(ring)->features & NETIF_F_RXCSUM))
		return;

	/* check for VXLAN or Geneve packet type */
	if (pkt_info & cpu_to_le16(IXGBE_RXDADV_PKTTYPE_VXLAN)) {
		encap_pkt = true;
#if defined(HAVE_UDP_ENC_RX_OFFLOAD) || defined(HAVE_VXLAN_RX_OFFLOAD)
		skb->encapsulation = 1;
#endif /* HAVE_UDP_ENC_RX_OFFLOAD || HAVE_VXLAN_RX_OFFLOAD */
		skb->ip_summed = CHECKSUM_NONE;
	}

	/* if IP and error */
	if (ixgbe_test_staterr(rx_desc, IXGBE_RXD_STAT_IPCS) &&
	    ixgbe_test_staterr(rx_desc, IXGBE_RXDADV_ERR_IPE)) {
		ring->rx_stats.csum_err++;
		return;
	}

	if (!ixgbe_test_staterr(rx_desc, IXGBE_RXD_STAT_L4CS))
		return;

	if (ixgbe_test_staterr(rx_desc, IXGBE_RXDADV_ERR_TCPE)) {

		/*
		 * 82599 errata, UDP frames with a 0 checksum can be marked as
		 * checksum errors.
		 */
		if ((pkt_info & cpu_to_le16(IXGBE_RXDADV_PKTTYPE_UDP)) &&
		    test_bit(__IXGBE_RX_CSUM_UDP_ZERO_ERR, &ring->state))
			return;

		ring->rx_stats.csum_err++;
		return;
	}

	/* It must be a TCP or UDP packet with a valid checksum */
	skb->ip_summed = CHECKSUM_UNNECESSARY;
	if (encap_pkt) {
		if (!ixgbe_test_staterr(rx_desc, IXGBE_RXD_STAT_OUTERIPCS))
			return;
		
		if (ixgbe_test_staterr(rx_desc, IXGBE_RXDADV_ERR_OUTERIPER)) {
			skb->ip_summed = CHECKSUM_NONE;
			return;
		}
#ifdef HAVE_SKBUFF_CSUM_LEVEL
		/* If we checked the outer header let the stack know */
		skb->csum_level = 1;
#endif /* HAVE_SKBUFF_CSUM_LEVEL */
	}
}

static inline void ixgbe_release_rx_desc(struct ixgbe_ring *rx_ring, u32 val)
{
	rx_ring->next_to_use = val;
#ifndef CONFIG_IXGBE_DISABLE_PACKET_SPLIT

	/* update next to alloc since we have filled the ring */
	rx_ring->next_to_alloc = val;
#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(val, rx_ring->tail);
}

#ifdef CONFIG_IXGBE_DISABLE_PACKET_SPLIT
static bool ixgbe_alloc_mapped_skb(struct ixgbe_ring *rx_ring,
				   struct ixgbe_rx_buffer *bi)
{
	struct sk_buff *skb = bi->skb;
	dma_addr_t dma = bi->dma;

	if (unlikely(dma))
		return true;

	if (likely(!skb)) {
		skb = netdev_alloc_skb_ip_align(netdev_ring(rx_ring),
						rx_ring->rx_buf_len);
		if (unlikely(!skb)) {
			rx_ring->rx_stats.alloc_rx_buff_failed++;
			return false;
		}

		bi->skb = skb;

	}

	dma = dma_map_single(rx_ring->dev, skb->data,
			     rx_ring->rx_buf_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_rx_buff_failed++;
		return false;
	}

	bi->dma = dma;
	return true;
}

#else /* !CONFIG_IXGBE_DISABLE_PACKET_SPLIT */
static inline unsigned int ixgbe_rx_offset(struct ixgbe_ring *rx_ring)
{
	return ring_uses_build_skb(rx_ring) ? IXGBE_SKB_PAD : 0;
}

static bool ixgbe_alloc_mapped_page(struct ixgbe_ring *rx_ring,
				    struct ixgbe_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_pages(GFP_ATOMIC | __GFP_COLD | __GFP_COMP,
			   ixgbe_rx_pg_order(rx_ring));
	if (unlikely(!page)) {
		rx_ring->rx_stats.alloc_rx_page_failed++;
		return false;
	}

	/* map page for use */
	dma = dma_map_page_attrs(rx_ring->dev, page, 0,
				 ixgbe_rx_pg_size(rx_ring),
				 DMA_FROM_DEVICE,
				 IXGBE_RX_DMA_ATTR);

	/*
	 * 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_pages(page, ixgbe_rx_pg_order(rx_ring));

		rx_ring->rx_stats.alloc_rx_page_failed++;
		return false;
	}

	bi->dma = dma;
	bi->page = page;
	bi->page_offset = ixgbe_rx_offset(rx_ring);
	bi->pagecnt_bias = 1;

	return true;
}

#endif /* !CONFIG_IXGBE_DISABLE_PACKET_SPLIT */
/**
 * ixgbe_alloc_rx_buffers - Replace used receive buffers
 * @rx_ring: ring to place buffers on
 * @cleaned_count: number of buffers to replace
 **/
void ixgbe_alloc_rx_buffers(struct ixgbe_ring *rx_ring, u16 cleaned_count)
{
	union ixgbe_adv_rx_desc *rx_desc;
	struct ixgbe_rx_buffer *bi;
	u16 i = rx_ring->next_to_use;
#ifndef CONFIG_IXGBE_DISABLE_PACKET_SPLIT
	u16 bufsz;
#endif

	/* nothing to do */
	if (!cleaned_count)
		return;

	rx_desc = IXGBE_RX_DESC(rx_ring, i);
	bi = &rx_ring->rx_buffer_info[i];
	i -= rx_ring->count;
#ifndef CONFIG_IXGBE_DISABLE_PACKET_SPLIT

	bufsz = ixgbe_rx_bufsz(rx_ring);
#endif

	do {
#ifdef CONFIG_IXGBE_DISABLE_PACKET_SPLIT
		if (!ixgbe_alloc_mapped_skb(rx_ring, bi))
			break;
#else
		if (!ixgbe_alloc_mapped_page(rx_ring, bi))
			break;

		/* sync the buffer for use by the device */
		dma_sync_single_range_for_device(rx_ring->dev, bi->dma,
						 bi->page_offset, bufsz,
						 DMA_FROM_DEVICE);
#endif

		/*
		 * Refresh the desc even if buffer_addrs didn't change
		 * because each write-back erases this info.
		 */
#ifdef CONFIG_IXGBE_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 = IXGBE_RX_DESC(rx_ring, 0);
			bi = rx_ring->rx_buffer_info;
			i -= rx_ring->count;
		}

		/* clear the length for the next_to_use descriptor */
		rx_desc->wb.upper.length = 0;

		cleaned_count--;
	} while (cleaned_count);

	i += rx_ring->count;

	if (rx_ring->next_to_use != i)
		ixgbe_release_rx_desc(rx_ring, i);
}

#ifdef CONFIG_IXGBE_DISABLE_PACKET_SPLIT
/**
 * ixgbe_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 *ixgbe_merge_active_tail(struct sk_buff *tail)
{
	struct sk_buff *head = IXGBE_CB(tail)->head;

	if (!head)
		return tail;

	head->len += tail->len;
	head->data_len += tail->len;
	head->truesize += tail->truesize;

	IXGBE_CB(tail)->head = NULL;

	return head;
}

/**
 * ixgbe_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 ixgbe_merge_active_tail.
 **/
static inline void ixgbe_add_active_tail(struct sk_buff *head,
					 struct sk_buff *tail)
{
	struct sk_buff *old_tail = IXGBE_CB(head)->tail;

	if (old_tail) {
		ixgbe_merge_active_tail(old_tail);
		old_tail->next = tail;
	} else {
		skb_shinfo(head)->frag_list = tail;
	}

	IXGBE_CB(tail)->head = head;
	IXGBE_CB(head)->tail = tail;
}

/**
 * ixgbe_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 ixgbe_close_active_frag_list(struct sk_buff *head)
{
	struct sk_buff *tail = IXGBE_CB(head)->tail;

	if (!tail)
		return false;

	ixgbe_merge_active_tail(tail);

	IXGBE_CB(head)->tail = NULL;

	return true;
}

#endif
#ifdef HAVE_VLAN_RX_REGISTER
/**
 * ixgbe_receive_skb - Send a completed packet up the stack
 * @q_vector: structure containing interrupt and ring information
 * @skb: packet to send up
 **/
static void ixgbe_receive_skb(struct ixgbe_q_vector *q_vector,
			      struct sk_buff *skb)
{
	u16 vlan_tag = IXGBE_CB(skb)->vid;

#if defined(NETIF_F_HW_VLAN_TX) || defined(NETIF_F_HW_VLAN_CTAG_TX)
	if (vlan_tag & VLAN_VID_MASK) {
		/* by placing vlgrp at start of structure we can alias it */
		struct vlan_group **vlgrp = netdev_priv(skb->dev);
		if (!*vlgrp)
			dev_kfree_skb_any(skb);
		else if (q_vector->netpoll_rx)
			vlan_hwaccel_rx(skb, *vlgrp, vlan_tag);
		else
			vlan_gro_receive(&q_vector->napi,
					 *vlgrp, vlan_tag, skb);
	} else {
#endif /* NETIF_F_HW_VLAN_TX || NETIF_F_HW_VLAN_CTAG_TX */
		if (q_vector->netpoll_rx)
			netif_rx(skb);
		else
			napi_gro_receive(&q_vector->napi, skb);
#if defined(NETIF_F_HW_VLAN_TX) || defined(NETIF_F_HW_VLAN_CTAG_TX)
	}
#endif /* NETIF_F_HW_VLAN_TX || NETIF_F_HW_VLAN_CTAG_TX */
}

#endif /* HAVE_VLAN_RX_REGISTER */
#ifdef NETIF_F_GSO
static void ixgbe_set_rsc_gso_size(struct ixgbe_ring __maybe_unused *ring,
				   struct sk_buff *skb)
{
	u16 hdr_len = eth_get_headlen(skb->data, skb_headlen(skb));

	/* set gso_size to avoid messing up TCP MSS */
	skb_shinfo(skb)->gso_size = DIV_ROUND_UP((skb->len - hdr_len),
						 IXGBE_CB(skb)->append_cnt);
	skb_shinfo(skb)->gso_type = SKB_GSO_TCPV4;
}

#endif /* NETIF_F_GSO */
static void ixgbe_update_rsc_stats(struct ixgbe_ring *rx_ring,
				   struct sk_buff *skb)
{
	/* if append_cnt is 0 then frame is not RSC */
	if (!IXGBE_CB(skb)->append_cnt)
		return;

	rx_ring->rx_stats.rsc_count += IXGBE_CB(skb)->append_cnt;
	rx_ring->rx_stats.rsc_flush++;

#ifdef NETIF_F_GSO
	ixgbe_set_rsc_gso_size(rx_ring, skb);

#endif
	/* gso_size is computed using append_cnt so always clear it last */
	IXGBE_CB(skb)->append_cnt = 0;
}

static void ixgbe_rx_vlan(struct ixgbe_ring *ring,
			  union ixgbe_adv_rx_desc *rx_desc,
			  struct sk_buff *skb)
{
#ifdef NETIF_F_HW_VLAN_CTAG_RX
	if ((netdev_ring(ring)->features & NETIF_F_HW_VLAN_CTAG_RX) &&
#else
	if ((netdev_ring(ring)->features & NETIF_F_HW_VLAN_RX) &&
#endif
	    ixgbe_test_staterr(rx_desc, IXGBE_RXD_STAT_VP))
#ifndef HAVE_VLAN_RX_REGISTER
		__vlan_hwaccel_put_tag(skb,
				       htons(ETH_P_8021Q),
				       le16_to_cpu(rx_desc->wb.upper.vlan));
#else
		IXGBE_CB(skb)->vid = le16_to_cpu(rx_desc->wb.upper.vlan);
	else
		IXGBE_CB(skb)->vid = 0;
#endif
}

/**
 * ixgbe_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 ixgbe_process_skb_fields(struct ixgbe_ring *rx_ring,
				     union ixgbe_adv_rx_desc *rx_desc,
				     struct sk_buff *skb)
{
#ifdef HAVE_PTP_1588_CLOCK
	u32 flags = rx_ring->q_vector->adapter->flags;

#endif
	ixgbe_update_rsc_stats(rx_ring, skb);

#ifdef NETIF_F_RXHASH
	ixgbe_rx_hash(rx_ring, rx_desc, skb);

#endif /* NETIF_F_RXHASH */
	ixgbe_rx_checksum(rx_ring, rx_desc, skb);
#ifdef HAVE_PTP_1588_CLOCK
	if (unlikely(flags & IXGBE_FLAG_RX_HWTSTAMP_ENABLED))
		ixgbe_ptp_rx_hwtstamp(rx_ring, rx_desc, skb);

#endif
	ixgbe_rx_vlan(rx_ring, rx_desc, skb);

	skb_record_rx_queue(skb, ring_queue_index(rx_ring));

	skb->protocol = eth_type_trans(skb, netdev_ring(rx_ring));
}

static void ixgbe_rx_skb(struct ixgbe_q_vector *q_vector,
			 struct ixgbe_ring *rx_ring,
			 union ixgbe_adv_rx_desc *rx_desc,
			 struct sk_buff *skb)
{
#ifdef HAVE_NDO_BUSY_POLL
	skb_mark_napi_id(skb, &q_vector->napi);

	if (ixgbe_qv_busy_polling(q_vector) || q_vector->netpoll_rx) {
		netif_receive_skb(skb);
		/* exit early if we busy polled */
		return;
	}
#endif

#ifdef HAVE_VLAN_RX_REGISTER
		ixgbe_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
}

/**
 * ixgbe_is_non_eop - process handling of non-EOP buffers
 * @rx_ring: Rx ring being processed
 * @rx_desc: Rx descriptor for current buffer
 * @skb: Current socket buffer containing buffer in progress
 *
 * 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 ixgbe_is_non_eop(struct ixgbe_ring *rx_ring,
			     union ixgbe_adv_rx_desc *rx_desc,
			     struct sk_buff *skb)
{
#ifdef CONFIG_IXGBE_DISABLE_PACKET_SPLIT
	struct sk_buff *next_skb;
#endif
	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(IXGBE_RX_DESC(rx_ring, ntc));

	/* update RSC append count if present */
	if (ring_is_rsc_enabled(rx_ring)) {
		__le32 rsc_enabled = rx_desc->wb.lower.lo_dword.data &
				     cpu_to_le32(IXGBE_RXDADV_RSCCNT_MASK);

		if (unlikely(rsc_enabled)) {
			u32 rsc_cnt = le32_to_cpu(rsc_enabled);

			rsc_cnt >>= IXGBE_RXDADV_RSCCNT_SHIFT;
			IXGBE_CB(skb)->append_cnt += rsc_cnt - 1;

			/* update ntc based on RSC value */
			ntc = le32_to_cpu(rx_desc->wb.upper.status_error);
			ntc &= IXGBE_RXDADV_NEXTP_MASK;
			ntc >>= IXGBE_RXDADV_NEXTP_SHIFT;
		}
	}

	/* if we are the last buffer then there is nothing else to do */
	if (likely(ixgbe_test_staterr(rx_desc, IXGBE_RXD_STAT_EOP)))
		return false;

	/* place skb in next buffer to be received */
#ifdef CONFIG_IXGBE_DISABLE_PACKET_SPLIT
	next_skb = rx_ring->rx_buffer_info[ntc].skb;

	ixgbe_add_active_tail(skb, next_skb);
	IXGBE_CB(next_skb)->head = skb;
#else
	rx_ring->rx_buffer_info[ntc].skb = skb;
#endif
	rx_ring->rx_stats.non_eop_descs++;

	return true;
}

#ifndef CONFIG_IXGBE_DISABLE_PACKET_SPLIT
/**
 * ixgbe_pull_tail - ixgbe specific version of skb_pull_tail
 * @skb: pointer to current skb being adjusted
 *
 * This function is an ixgbe 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 ixgbe_pull_tail(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);

	/*
	 * 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 = eth_get_headlen(va, IXGBE_RX_HDR_SIZE);

	/* 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;
}

/**
 * ixgbe_dma_sync_frag - perform DMA sync for first frag of SKB
 * @rx_ring: rx descriptor ring packet is being transacted on
 * @skb: pointer to current skb being updated
 *
 * This function provides a basic DMA sync up for the first fragment of an
 * skb.  The reason for doing this is that the first fragment cannot be
 * unmapped until we have reached the end of packet descriptor for a buffer
 * chain.
 */
static void ixgbe_dma_sync_frag(struct ixgbe_ring *rx_ring,
				struct sk_buff *skb)
{
	/* if the page was released unmap it, else just sync our portion */
	if (unlikely(IXGBE_CB(skb)->page_released)) {
		dma_unmap_page_attrs(rx_ring->dev, IXGBE_CB(skb)->dma,
				     ixgbe_rx_pg_size(rx_ring),
				     DMA_FROM_DEVICE,
				     IXGBE_RX_DMA_ATTR);
	} else {
		struct skb_frag_struct *frag = &skb_shinfo(skb)->frags[0];

		dma_sync_single_range_for_cpu(rx_ring->dev,
					      IXGBE_CB(skb)->dma,
					      frag->page_offset,
					      skb_frag_size(frag),
					      DMA_FROM_DEVICE);
	}
}

/**
 * ixgbe_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
 *
 * Check for corrupted packet headers caused by senders on the local L2
 * embedded NIC switch not setting up their Tx Descriptors right.  These
 * should be very rare.
 *
 * Also 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 ixgbe_cleanup_headers(struct ixgbe_ring __maybe_unused *rx_ring,
				  union ixgbe_adv_rx_desc *rx_desc,
				  struct sk_buff *skb)
{
	/* verify that the packet does not have any known errors */
	if (unlikely(ixgbe_test_staterr(rx_desc,
					IXGBE_RXDADV_ERR_FRAME_ERR_MASK))) {
		dev_kfree_skb_any(skb);
		return true;
	}

	/* place header in linear portion of buffer */
	if (!skb_headlen(skb))
		ixgbe_pull_tail(skb);

#if IS_ENABLED(CONFIG_FCOE)
	/* do not attempt to pad FCoE Frames as this will disrupt DDP */
	if (ixgbe_rx_is_fcoe(rx_ring, rx_desc))
		return false;
#endif

	/* if eth_skb_pad returns an error the skb was freed */
	if (eth_skb_pad(skb))
		return true;

	return false;
}

/**
 * ixgbe_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 ixgbe_reuse_rx_page(struct ixgbe_ring *rx_ring,
				struct ixgbe_rx_buffer *old_buff)
{
	struct ixgbe_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.
	 * Move each member individually to avoid possible store
	 * forwarding stalls and unnecessary copy of skb.
	 */
	new_buff->dma		= old_buff->dma;
	new_buff->page		= old_buff->page;
	new_buff->page_offset	= old_buff->page_offset;
	new_buff->pagecnt_bias	= old_buff->pagecnt_bias;
}

static inline bool ixgbe_page_is_reserved(struct page *page)
{
	return (page_to_nid(page) != numa_mem_id()) || page_is_pfmemalloc(page);
}

static bool ixgbe_can_reuse_rx_page(struct ixgbe_rx_buffer *rx_buffer)
{
	unsigned int pagecnt_bias = rx_buffer->pagecnt_bias;
	struct page *page = rx_buffer->page;

	/* avoid re-using remote pages */
	if (unlikely(ixgbe_page_is_reserved(page)))
		return false;

#if (PAGE_SIZE < 8192)
	/* if we are only owner of page we can reuse it */
#ifdef HAVE_PAGE_COUNT_BULK_UPDATE
	if (unlikely((page_ref_count(page) - pagecnt_bias) > 1))
#else
	if (unlikely((page_count(page) - pagecnt_bias) > 1))
#endif
		return false;
#else
	/* The last offset is a bit aggressive in that we assume the
	 * worst case of FCoE being enabled and using a 3K buffer.
	 * However this should have minimal impact as the 1K extra is
	 * still less than one buffer in size.
	 */
#define IXGBE_LAST_OFFSET \
	(SKB_WITH_OVERHEAD(PAGE_SIZE) - IXGBE_RXBUFFER_3K)
	if (rx_buffer->page_offset > IXGBE_LAST_OFFSET)
		return false;
#endif

#ifdef HAVE_PAGE_COUNT_BULK_UPDATE
	/* If we have drained the page fragment pool we need to update
	 * the pagecnt_bias and page count so that we fully restock the
	 * number of references the driver holds.
	 */
	if (unlikely(!pagecnt_bias)) {
		page_ref_add(page, USHRT_MAX);
		rx_buffer->pagecnt_bias = USHRT_MAX;
	}
#else
	/* Even if we own the page, we are not allowed to use atomic_set()
	 * This would break get_page_unless_zero() users.
	 */
	if (likely(!pagecnt_bias)) {
		page_ref_inc(page);
		rx_buffer->pagecnt_bias = 1;
	}
#endif

	return true;
}

/**
 * ixgbe_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 void ixgbe_add_rx_frag(struct ixgbe_ring *rx_ring,
			      struct ixgbe_rx_buffer *rx_buffer,
			      struct sk_buff *skb,
			      unsigned int size)
{
#if (PAGE_SIZE < 8192)
	unsigned int truesize = ixgbe_rx_pg_size(rx_ring) / 2;
#else
	unsigned int truesize = ring_uses_build_skb(rx_ring) ?
				SKB_DATA_ALIGN(IXGBE_SKB_PAD + size) :
				SKB_DATA_ALIGN(size);
#endif

	skb_add_rx_frag(skb, skb_shinfo(skb)->nr_frags, rx_buffer->page,
			rx_buffer->page_offset, size, truesize);

#if (PAGE_SIZE < 8192)
	rx_buffer->page_offset ^= truesize;
#else
	rx_buffer->page_offset += truesize;
#endif
}

static struct ixgbe_rx_buffer *
ixgbe_get_rx_buffer(struct ixgbe_ring *rx_ring,
		    union ixgbe_adv_rx_desc *rx_desc, struct sk_buff **skb,
		    const unsigned int size)
{
	struct ixgbe_rx_buffer *rx_buffer;

	rx_buffer = &rx_ring->rx_buffer_info[rx_ring->next_to_clean];
	prefetchw(rx_buffer->page);
	*skb = rx_buffer->skb;

	/* Delay unmapping of the first packet. It carries the header
	 * information, HW may still access the header after the writeback.
	 * Only unmap it when EOP is reached
	 */
	if (!ixgbe_test_staterr(rx_desc, IXGBE_RXD_STAT_EOP)) {
		if (!*skb)
			goto skip_sync;
	} else {
		if (*skb)
			ixgbe_dma_sync_frag(rx_ring, *skb);
	}

	/* 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,
				      size,
				      DMA_FROM_DEVICE);
skip_sync:
	rx_buffer->pagecnt_bias--;

	return rx_buffer;
}

static void ixgbe_put_rx_buffer(struct ixgbe_ring *rx_ring,
				struct ixgbe_rx_buffer *rx_buffer,
				struct sk_buff *skb)
{
	if (ixgbe_can_reuse_rx_page(rx_buffer)) {
		/* hand second half of page back to the ring */
		ixgbe_reuse_rx_page(rx_ring, rx_buffer);
	} else {
		if (IXGBE_CB(skb)->dma == rx_buffer->dma) {
			/* the page has been released from the ring */
			IXGBE_CB(skb)->page_released = true;
		} else {
			/* we are not reusing the buffer so unmap it */
			dma_unmap_page_attrs(rx_ring->dev, rx_buffer->dma,
					     ixgbe_rx_pg_size(rx_ring),
					     DMA_FROM_DEVICE,
					     IXGBE_RX_DMA_ATTR);
		}
		__page_frag_cache_drain(rx_buffer->page,
					rx_buffer->pagecnt_bias);
	}

	/* clear contents of rx_buffer */
	rx_buffer->page = NULL;
	rx_buffer->skb = NULL;
}

static struct sk_buff *ixgbe_construct_skb(struct ixgbe_ring *rx_ring,
					   struct ixgbe_rx_buffer *rx_buffer,
					   union ixgbe_adv_rx_desc *rx_desc,
					   unsigned int size)
{
	void *va = page_address(rx_buffer->page) + rx_buffer->page_offset;
#if (PAGE_SIZE < 8192)
	unsigned int truesize = ixgbe_rx_pg_size(rx_ring) / 2;
#else
	unsigned int truesize = SKB_DATA_ALIGN(size);
#endif
	struct sk_buff *skb;

	/* prefetch first cache line of first page */
	prefetch(va);
#if L1_CACHE_BYTES < 128
	prefetch(va + L1_CACHE_BYTES);
#endif

	/* allocate a skb to store the frags */
	skb = napi_alloc_skb(&rx_ring->q_vector->napi, IXGBE_RX_HDR_SIZE);
	if (unlikely(!skb))
		return NULL;

	if (size > IXGBE_RX_HDR_SIZE) {
		if (!ixgbe_test_staterr(rx_desc, IXGBE_RXD_STAT_EOP))
			IXGBE_CB(skb)->dma = rx_buffer->dma;

		skb_add_rx_frag(skb, 0, rx_buffer->page,
				rx_buffer->page_offset,
				size, truesize);
#if (PAGE_SIZE < 8192)
		rx_buffer->page_offset ^= truesize;
#else
		rx_buffer->page_offset += truesize;
#endif
	} else {
		memcpy(__skb_put(skb, size), va, ALIGN(size, sizeof(long)));
		rx_buffer->pagecnt_bias++;
	}

	return skb;
}

#ifdef HAVE_SWIOTLB_SKIP_CPU_SYNC
static struct sk_buff *ixgbe_build_skb(struct ixgbe_ring *rx_ring,
				       struct ixgbe_rx_buffer *rx_buffer,
				       union ixgbe_adv_rx_desc *rx_desc,
				       unsigned int size)
{
	void *va = page_address(rx_buffer->page) + rx_buffer->page_offset;
#if (PAGE_SIZE < 8192)
	unsigned int truesize = ixgbe_rx_pg_size(rx_ring) / 2;
#else
	unsigned int truesize = SKB_DATA_ALIGN(sizeof(struct skb_shared_info)) +
				SKB_DATA_ALIGN(IXGBE_SKB_PAD + size);
#endif
	struct sk_buff *skb;

	/* prefetch first cache line of first page */
	prefetch(va);
#if L1_CACHE_BYTES < 128
	prefetch(va + L1_CACHE_BYTES);
#endif

	/* build an skb around the page buffer */
	skb = build_skb(va - IXGBE_SKB_PAD, truesize);
	if (unlikely(!skb))
		return NULL;

	/* update pointers within the skb to store the data */
	skb_reserve(skb, IXGBE_SKB_PAD);
	__skb_put(skb, size);

	/* record DMA address if this is the start of a chain of buffers */
	if (!ixgbe_test_staterr(rx_desc, IXGBE_RXD_STAT_EOP))
		IXGBE_CB(skb)->dma = rx_buffer->dma;

	/* update buffer offset */
#if (PAGE_SIZE < 8192)
	rx_buffer->page_offset ^= truesize;
#else
	rx_buffer->page_offset += truesize;
#endif

	return skb;
}

#endif  /* HAVE_SWIOTLB_SKIP_CPU_SYNC */
/**
 * ixgbe_clean_rx_irq - Clean completed descriptors from Rx ring - bounce buf
 * @q_vector: structure containing interrupt and ring information
 * @rx_ring: rx descriptor ring to transact packets on
 * @budget: Total limit on number of packets to process
 *
 * This function provides a "bounce buffer" approach to Rx interrupt
 * processing.  The advantage to this is that on systems that have
 * expensive overhead for IOMMU access this provides a means of avoiding
 * it by maintaining the mapping of the page to the syste.
 *
 * Returns amount of work completed.
 **/
static int ixgbe_clean_rx_irq(struct ixgbe_q_vector *q_vector,
			       struct ixgbe_ring *rx_ring,
			       int budget)
{
	unsigned int total_rx_bytes = 0, total_rx_packets = 0;
#if IS_ENABLED(CONFIG_FCOE)
	int ddp_bytes;
	unsigned int mss = 0;
#endif /* CONFIG_FCOE */
	u16 cleaned_count = ixgbe_desc_unused(rx_ring);

	while (likely(total_rx_packets < budget)) {
		union ixgbe_adv_rx_desc *rx_desc;
		struct ixgbe_rx_buffer *rx_buffer;
		struct sk_buff *skb;
		unsigned int size;

		/* return some buffers to hardware, one at a time is too slow */
		if (cleaned_count >= IXGBE_RX_BUFFER_WRITE) {
			ixgbe_alloc_rx_buffers(rx_ring, cleaned_count);
			cleaned_count = 0;
		}

		rx_desc = IXGBE_RX_DESC(rx_ring, rx_ring->next_to_clean);
		size = le16_to_cpu(rx_desc->wb.upper.length);
		if (!size)
			break;

		/* This memory barrier is needed to keep us from reading
		 * any other fields out of the rx_desc until we know the
		 * descriptor has been written back
		 */
		dma_rmb();

		rx_buffer = ixgbe_get_rx_buffer(rx_ring, rx_desc, &skb, size);

		/* retrieve a buffer from the ring */
		if (skb)
			ixgbe_add_rx_frag(rx_ring, rx_buffer, skb, size);
#ifdef HAVE_SWIOTLB_SKIP_CPU_SYNC
		else if (ring_uses_build_skb(rx_ring))
			skb = ixgbe_build_skb(rx_ring, rx_buffer,
					      rx_desc, size);
#endif
		else
			skb = ixgbe_construct_skb(rx_ring, rx_buffer, rx_desc,
						  size);

		/* exit if we failed to retrieve a buffer */
		if (!skb) {
			rx_ring->rx_stats.alloc_rx_buff_failed++;
			rx_buffer->pagecnt_bias++;
			break;
		}

		ixgbe_put_rx_buffer(rx_ring, rx_buffer, skb);
		cleaned_count++;

		/* place incomplete frames back on ring for completion */
		if (ixgbe_is_non_eop(rx_ring, rx_desc, skb))
			continue;

		/* verify the packet layout is correct */
		if (ixgbe_cleanup_headers(rx_ring, rx_desc, skb))
			continue;

		/* probably a little skewed due to removing CRC */
		total_rx_bytes += skb->len;

		/* populate checksum, timestamp, VLAN, and protocol */
		ixgbe_process_skb_fields(rx_ring, rx_desc, skb);

#if IS_ENABLED(CONFIG_FCOE)
		/* if ddp, not passing to ULD unless for FCP_RSP or error */
		if (ixgbe_rx_is_fcoe(rx_ring, rx_desc)) {
			ddp_bytes = ixgbe_fcoe_ddp(q_vector->adapter,
						   rx_desc, skb);
			/* include DDPed FCoE data */
			if (ddp_bytes > 0) {
				if (!mss) {
					mss = netdev_ring(rx_ring)->mtu -
						sizeof(struct fcoe_hdr) -
						sizeof(struct fc_frame_header) -
						sizeof(struct fcoe_crc_eof);
					if (mss > 512)
						mss &= ~511;
				}
				total_rx_bytes += ddp_bytes;
				total_rx_packets += DIV_ROUND_UP(ddp_bytes,
								 mss);
			}
			if (!ddp_bytes) {
				dev_kfree_skb_any(skb);
#ifndef NETIF_F_GRO
				netdev_ring(rx_ring)->last_rx = jiffies;
#endif
				continue;
			}
		}
#endif /* CONFIG_FCOE */

		ixgbe_rx_skb(q_vector, rx_ring, rx_desc, skb);

		/* update budget accounting */
		total_rx_packets++;
	}

	u64_stats_update_begin(&rx_ring->syncp);
	rx_ring->stats.packets += total_rx_packets;
	rx_ring->stats.bytes += total_rx_bytes;
	u64_stats_update_end(&rx_ring->syncp);
	q_vector->rx.total_packets += total_rx_packets;
	q_vector->rx.total_bytes += total_rx_bytes;

	return total_rx_packets;
}

#else /* CONFIG_IXGBE_DISABLE_PACKET_SPLIT */
/**
 * ixgbe_clean_rx_irq - Clean completed descriptors from Rx ring - legacy
 * @q_vector: structure containing interrupt and ring information
 * @rx_ring: rx descriptor ring to transact packets on
 * @budget: Total limit on number of packets to process
 *
 * This function provides a legacy approach to Rx interrupt
 * handling.  This version will perform better on systems with a low cost
 * dma mapping API.
 *
 * Returns amount of work completed.
 **/
static int ixgbe_clean_rx_irq(struct ixgbe_q_vector *q_vector,
			       struct ixgbe_ring *rx_ring,
			       int budget)
{
	unsigned int total_rx_bytes = 0, total_rx_packets = 0;
#if IS_ENABLED(CONFIG_FCOE)
	int ddp_bytes;
	unsigned int mss = 0;
#endif /* CONFIG_FCOE */
	u16 len = 0;
	u16 cleaned_count = ixgbe_desc_unused(rx_ring);

	while (likely(total_rx_packets < budget)) {
		struct ixgbe_rx_buffer *rx_buffer;
		union ixgbe_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 >= IXGBE_RX_BUFFER_WRITE) {
			ixgbe_alloc_rx_buffers(rx_ring, cleaned_count);
			cleaned_count = 0;
		}

		ntc = rx_ring->next_to_clean;
		rx_desc = IXGBE_RX_DESC(rx_ring, ntc);
		rx_buffer = &rx_ring->rx_buffer_info[ntc];

		if (!rx_desc->wb.upper.length)
			break;

		/* This memory barrier is needed to keep us from reading
		 * any other fields out of the rx_desc until we know the
		 * descriptor has been written back
		 */
		dma_rmb();

		skb = rx_buffer->skb;

		prefetch(skb->data);

		len = le16_to_cpu(rx_desc->wb.upper.length);
		/* pull the header of the skb in */
		__skb_put(skb, len);

		/*
		 * Delay unmapping of the first packet. It carries the
		 * header information, HW may still access the header after
		 * the writeback.  Only unmap it when EOP is reached
		 */
		if (!IXGBE_CB(skb)->head) {
			IXGBE_CB(skb)->dma = rx_buffer->dma;
		} else {
			skb = ixgbe_merge_active_tail(skb);
			dma_unmap_single(rx_ring->dev,
					 rx_buffer->dma,
					 rx_ring->rx_buf_len,
					 DMA_FROM_DEVICE);
		}

		/* clear skb reference in buffer info structure */
		rx_buffer->skb = NULL;
		rx_buffer->dma = 0;

		cleaned_count++;

		if (ixgbe_is_non_eop(rx_ring, rx_desc, skb))
			continue;

		dma_unmap_single(rx_ring->dev,
				 IXGBE_CB(skb)->dma,
				 rx_ring->rx_buf_len,
				 DMA_FROM_DEVICE);

		IXGBE_CB(skb)->dma = 0;

		if (ixgbe_close_active_frag_list(skb) &&
		    !IXGBE_CB(skb)->append_cnt) {
			/* if we got here without RSC the packet is invalid */
			dev_kfree_skb_any(skb);
			continue;
		}

		/* ERR_MASK will only have valid bits if EOP set */
		if (unlikely(ixgbe_test_staterr(rx_desc,
					   IXGBE_RXDADV_ERR_FRAME_ERR_MASK))) {
			dev_kfree_skb_any(skb);
			continue;
		}

		/* probably a little skewed due to removing CRC */
		total_rx_bytes += skb->len;

		/* populate checksum, timestamp, VLAN, and protocol */
		ixgbe_process_skb_fields(rx_ring, rx_desc, skb);

#if IS_ENABLED(CONFIG_FCOE)
		/* if ddp, not passing to ULD unless for FCP_RSP or error */
		if (ixgbe_rx_is_fcoe(rx_ring, rx_desc)) {
			ddp_bytes = ixgbe_fcoe_ddp(q_vector->adapter,
						   rx_desc, skb);
			/* include DDPed FCoE data */
			if (ddp_bytes > 0) {
				if (!mss) {
					mss = netdev_ring(rx_ring)->mtu -
						sizeof(struct fcoe_hdr) -
						sizeof(struct fc_frame_header) -
						sizeof(struct fcoe_crc_eof);
					if (mss > 512)
						mss &= ~511;
				}
				total_rx_bytes += ddp_bytes;
				total_rx_packets += DIV_ROUND_UP(ddp_bytes,
								 mss);
			}
			if (!ddp_bytes) {
				dev_kfree_skb_any(skb);
#ifndef NETIF_F_GRO
				netdev_ring(rx_ring)->last_rx = jiffies;
#endif
				continue;
			}
		}

#endif /* CONFIG_FCOE */
		ixgbe_rx_skb(q_vector, rx_ring, rx_desc, skb);

		/* update budget accounting */
		total_rx_packets++;
	}

	rx_ring->stats.packets += total_rx_packets;
	rx_ring->stats.bytes += total_rx_bytes;
	q_vector->rx.total_packets += total_rx_packets;
	q_vector->rx.total_bytes += total_rx_bytes;

	if (cleaned_count)
		ixgbe_alloc_rx_buffers(rx_ring, cleaned_count);

	return total_rx_packets;
}

#endif /* CONFIG_IXGBE_DISABLE_PACKET_SPLIT */
#ifdef HAVE_NDO_BUSY_POLL
/* must be called with local_bh_disable()d */
static int ixgbe_busy_poll_recv(struct napi_struct *napi)
{
	struct ixgbe_q_vector *q_vector =
			container_of(napi, struct ixgbe_q_vector, napi);
	struct ixgbe_adapter *adapter = q_vector->adapter;
	struct ixgbe_ring  *ring;
	int found = 0;

	if (test_bit(__IXGBE_DOWN, &adapter->state))
		return LL_FLUSH_FAILED;

	if (!ixgbe_qv_lock_poll(q_vector))
		return LL_FLUSH_BUSY;

	ixgbe_for_each_ring(ring, q_vector->rx) {
		found = ixgbe_clean_rx_irq(q_vector, ring, 4);
#ifdef BP_EXTENDED_STATS
		if (found)
			ring->stats.cleaned += found;
		else
			ring->stats.misses++;
#endif
		if (found)
			break;
	}

	ixgbe_qv_unlock_poll(q_vector);

	return found;
}

#endif /* HAVE_NDO_BUSY_POLL */
/**
 * ixgbe_configure_msix - Configure MSI-X hardware
 * @adapter: board private structure
 *
 * ixgbe_configure_msix sets up the hardware to properly generate MSI-X
 * interrupts.
 **/
static void ixgbe_configure_msix(struct ixgbe_adapter *adapter)
{
	int v_idx;
	u32 mask;

	/* Populate MSIX to EITR Select */
	if (adapter->num_vfs >= 32) {
		u32 eitrsel = (1 << (adapter->num_vfs - 32)) - 1;
		IXGBE_WRITE_REG(&adapter->hw, IXGBE_EITRSEL, eitrsel);
	}

	/*
	 * Populate the IVAR table and set the ITR values to the
	 * corresponding register.
	 */
	for (v_idx = 0; v_idx < adapter->num_q_vectors; v_idx++) {
		struct ixgbe_q_vector *q_vector = adapter->q_vector[v_idx];
		struct ixgbe_ring *ring;

		ixgbe_for_each_ring(ring, q_vector->rx)
			ixgbe_set_ivar(adapter, 0, ring->reg_idx, v_idx);

		ixgbe_for_each_ring(ring, q_vector->tx)
			ixgbe_set_ivar(adapter, 1, ring->reg_idx, v_idx);

		ixgbe_write_eitr(q_vector);
	}

	switch (adapter->hw.mac.type) {
	case ixgbe_mac_82598EB:
		ixgbe_set_ivar(adapter, -1, IXGBE_IVAR_OTHER_CAUSES_INDEX,
			       v_idx);
		break;
	case ixgbe_mac_82599EB:
	case ixgbe_mac_X540:
	case ixgbe_mac_X550:
	case ixgbe_mac_X550EM_x:
	case ixgbe_mac_X550EM_a:
		ixgbe_set_ivar(adapter, -1, 1, v_idx);
		break;
	default:
		break;
	}
	IXGBE_WRITE_REG(&adapter->hw, IXGBE_EITR(v_idx), 1950);

	/* set up to autoclear timer, and the vectors */
	mask = IXGBE_EIMS_ENABLE_MASK;
	mask &= ~(IXGBE_EIMS_OTHER |
		  IXGBE_EIMS_MAILBOX |
		  IXGBE_EIMS_LSC);

	IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIAC, mask);
}

enum latency_range {
	lowest_latency = 0,
	low_latency = 1,
	bulk_latency = 2,
	latency_invalid = 255
};

/**
 * ixgbe_update_itr - update the dynamic ITR value based on statistics
 * @q_vector: structure containing interrupt and ring information
 * @ring_container: structure containing ring performance data
 *
 *      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 ixgbe_param.c)
 **/
static void ixgbe_update_itr(struct ixgbe_q_vector *q_vector,
			     struct ixgbe_ring_container *ring_container)
{
	int bytes = ring_container->total_bytes;
	int packets = ring_container->total_packets;
	u32 timepassed_us;
	u64 bytes_perint;
	u8 itr_setting = ring_container->itr;

	if (packets == 0)
		return;

	/* simple throttlerate management
	 *   0-10MB/s   lowest (100000 ints/s)
	 *  10-20MB/s   low    (20000 ints/s)
	 *  20-1249MB/s bulk   (12000 ints/s)
	 */
	/* what was last interrupt timeslice? */
	timepassed_us = q_vector->itr >> 2;
	if (timepassed_us == 0)
		return;
	bytes_perint = bytes / timepassed_us; /* bytes/usec */

	switch (itr_setting) {
	case lowest_latency:
		if (bytes_perint > 10) {
			itr_setting = low_latency;
		}
		break;
	case low_latency:
		if (bytes_perint > 20) {
			itr_setting = bulk_latency;
		} else if (bytes_perint <= 10) {
			itr_setting = lowest_latency;
		}
		break;
	case bulk_latency:
		if (bytes_perint <= 20) {
			itr_setting = 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 = itr_setting;
}

/**
 * ixgbe_write_eitr - write EITR register in hardware specific way
 * @q_vector: structure containing interrupt and ring information
 *
 * This function is made to be called by ethtool and by the driver
 * when it needs to update EITR registers at runtime.  Hardware
 * specific quirks/differences are taken care of here.
 */
void ixgbe_write_eitr(struct ixgbe_q_vector *q_vector)
{
	struct ixgbe_adapter *adapter = q_vector->adapter;
	struct ixgbe_hw *hw = &adapter->hw;
	int v_idx = q_vector->v_idx;
	u32 itr_reg = q_vector->itr & IXGBE_MAX_EITR;

	switch (adapter->hw.mac.type) {
	case ixgbe_mac_82598EB:
		/* must write high and low 16 bits to reset counter */
		itr_reg |= (itr_reg << 16);
		break;
	case ixgbe_mac_82599EB:
	case ixgbe_mac_X540:
	case ixgbe_mac_X550:
	case ixgbe_mac_X550EM_x:
	case ixgbe_mac_X550EM_a:
		/*
		 * set the WDIS bit to not clear the timer bits and cause an
		 * immediate assertion of the interrupt
		 */
		itr_reg |= IXGBE_EITR_CNT_WDIS;
		break;
	default:
		break;
	}
	IXGBE_WRITE_REG(hw, IXGBE_EITR(v_idx), itr_reg);
}

static void ixgbe_set_itr(struct ixgbe_q_vector *q_vector)
{
	u32 new_itr = q_vector->itr;
	u8 current_itr;

	ixgbe_update_itr(q_vector, &q_vector->tx);
	ixgbe_update_itr(q_vector, &q_vector->rx);

	current_itr = max(q_vector->rx.itr, q_vector->tx.itr);

	switch (current_itr) {
	/* counts and packets in update_itr are dependent on these numbers */
	case lowest_latency:
		new_itr = IXGBE_100K_ITR;
		break;
	case low_latency:
		new_itr = IXGBE_20K_ITR;
		break;
	case bulk_latency:
		new_itr = IXGBE_12K_ITR;
		break;
	default:
		break;
	}

	if (new_itr != q_vector->itr) {
		/* do an exponential smoothing */
		new_itr = (10 * new_itr * q_vector->itr) /
			  ((9 * new_itr) + q_vector->itr);

		/* save the algorithm value here */
		q_vector->itr = new_itr;

		ixgbe_write_eitr(q_vector);
	}
}

/**
 * ixgbe_check_overtemp_subtask - check for over temperature
 * @adapter: pointer to adapter
 **/
static void ixgbe_check_overtemp_subtask(struct ixgbe_adapter *adapter)
{
	struct ixgbe_hw *hw = &adapter->hw;
	u32 eicr = adapter->interrupt_event;
	s32 rc;

	if (test_bit(__IXGBE_DOWN, &adapter->state))
		return;

	if (!(adapter->flags2 & IXGBE_FLAG2_TEMP_SENSOR_EVENT))
		return;

	adapter->flags2 &= ~IXGBE_FLAG2_TEMP_SENSOR_EVENT;

	switch (hw->device_id) {
	case IXGBE_DEV_ID_82599_T3_LOM:
		/*
		 * Since the warning interrupt is for both ports
		 * we don't have to check if:
		 *  - This interrupt wasn't for our port.
		 *  - We may have missed the interrupt so always have to
		 *    check if we  got a LSC
		 */
		if (!(eicr & IXGBE_EICR_GPI_SDP0) &&
		    !(eicr & IXGBE_EICR_LSC))
			return;

		if (!(eicr & IXGBE_EICR_LSC) && hw->mac.ops.check_link) {
			u32 speed;
			bool link_up = false;

			hw->mac.ops.check_link(hw, &speed, &link_up, false);

			if (link_up)
				return;
		}

		/* Check if this is not due to overtemp */
		if (hw->phy.ops.check_overtemp(hw) != IXGBE_ERR_OVERTEMP)
			return;

		break;
	case IXGBE_DEV_ID_X550EM_A_1G_T:
	case IXGBE_DEV_ID_X550EM_A_1G_T_L:
		rc = hw->phy.ops.check_overtemp(hw);
		if (rc != IXGBE_ERR_OVERTEMP)
			return;
		break;
	default:
		if (adapter->hw.mac.type >= ixgbe_mac_X540)
			return;
		if (!(eicr & IXGBE_EICR_GPI_SDP0_BY_MAC(hw)))
			return;
		break;
	}
	e_crit(drv, "%s\n", ixgbe_overheat_msg);

	adapter->interrupt_event = 0;
}

static void ixgbe_check_fan_failure(struct ixgbe_adapter *adapter, u32 eicr)
{
	struct ixgbe_hw *hw = &adapter->hw;

	if ((adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE) &&
	    (eicr & IXGBE_EICR_GPI_SDP1)) {
		e_crit(probe, "Fan has stopped, replace the adapter\n");
		/* write to clear the interrupt */
		IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_GPI_SDP1);
	}
}

static void ixgbe_check_overtemp_event(struct ixgbe_adapter *adapter, u32 eicr)
{
	if (!(adapter->flags2 & IXGBE_FLAG2_TEMP_SENSOR_CAPABLE))
		return;

	switch (adapter->hw.mac.type) {
	case ixgbe_mac_82599EB:
		/*
		 * Need to check link state so complete overtemp check
		 * on service task
		 */
		if (((eicr & IXGBE_EICR_GPI_SDP0) || (eicr & IXGBE_EICR_LSC)) &&
		    (!test_bit(__IXGBE_DOWN, &adapter->state))) {
			adapter->interrupt_event = eicr;
			adapter->flags2 |= IXGBE_FLAG2_TEMP_SENSOR_EVENT;
			ixgbe_service_event_schedule(adapter);
			return;
		}
		return;
	case ixgbe_mac_X550EM_a:
		if (eicr & IXGBE_EICR_GPI_SDP0_X550EM_a) {
			adapter->interrupt_event = eicr;
			adapter->flags2 |= IXGBE_FLAG2_TEMP_SENSOR_EVENT;
			ixgbe_service_event_schedule(adapter);
			IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC,
					IXGBE_EICR_GPI_SDP0_X550EM_a);
			IXGBE_WRITE_REG(&adapter->hw, IXGBE_EICR,
					IXGBE_EICR_GPI_SDP0_X550EM_a);
		}
		return;
	case ixgbe_mac_X550:
	case ixgbe_mac_X540:
		if (!(eicr & IXGBE_EICR_TS))
			return;
		break;
	default:
		return;
	}

	e_crit(drv, "%s\n", ixgbe_overheat_msg);
}

static void ixgbe_check_sfp_event(struct ixgbe_adapter *adapter, u32 eicr)
{
	struct ixgbe_hw *hw = &adapter->hw;
	u32 eicr_mask = IXGBE_EICR_GPI_SDP2_BY_MAC(hw);

	if (!ixgbe_is_sfp(hw))
		return;
	if (hw->mac.type >= ixgbe_mac_X540)
		eicr_mask = IXGBE_EICR_GPI_SDP0_X540;

	if (eicr & eicr_mask) {
		/* Clear the interrupt */
		IXGBE_WRITE_REG(hw, IXGBE_EICR, eicr_mask);
		if (!test_bit(__IXGBE_DOWN, &adapter->state)) {
			adapter->flags2 |= IXGBE_FLAG2_SFP_NEEDS_RESET;
			adapter->sfp_poll_time = 0;
			ixgbe_service_event_schedule(adapter);
		}
	}

	if (adapter->hw.mac.type == ixgbe_mac_82599EB &&
	    (eicr & IXGBE_EICR_GPI_SDP1_BY_MAC(hw))) {
		/* Clear the interrupt */
		IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_GPI_SDP1_BY_MAC(hw));
		if (!test_bit(__IXGBE_DOWN, &adapter->state)) {
			adapter->flags |= IXGBE_FLAG_NEED_LINK_CONFIG;
			ixgbe_service_event_schedule(adapter);
		}
	}
}

static void ixgbe_check_lsc(struct ixgbe_adapter *adapter)
{
	struct ixgbe_hw *hw = &adapter->hw;

	adapter->lsc_int++;
	adapter->flags |= IXGBE_FLAG_NEED_LINK_UPDATE;
	adapter->link_check_timeout = jiffies;
	if (!test_bit(__IXGBE_DOWN, &adapter->state)) {
		IXGBE_WRITE_REG(hw, IXGBE_EIMC, IXGBE_EIMC_LSC);
		IXGBE_WRITE_FLUSH(hw);
		ixgbe_service_event_schedule(adapter);
	}
}

static void ixgbe_irq_enable_queues(struct ixgbe_adapter *adapter, u64 qmask)
{
	u32 mask;
	struct ixgbe_hw *hw = &adapter->hw;

	switch (hw->mac.type) {
	case ixgbe_mac_82598EB:
		mask = (IXGBE_EIMS_RTX_QUEUE & qmask);
		IXGBE_WRITE_REG(hw, IXGBE_EIMS, mask);
		break;
	case ixgbe_mac_82599EB:
	case ixgbe_mac_X540:
	case ixgbe_mac_X550:
	case ixgbe_mac_X550EM_x:
	case ixgbe_mac_X550EM_a:
		mask = (qmask & 0xFFFFFFFF);
		if (mask)
			IXGBE_WRITE_REG(hw, IXGBE_EIMS_EX(0), mask);
		mask = (qmask >> 32);
		if (mask)
			IXGBE_WRITE_REG(hw, IXGBE_EIMS_EX(1), mask);
		break;
	default:
		break;
	}
	/* skip the flush */
}

/**
 * ixgbe_irq_enable - Enable default interrupt generation settings
 * @adapter: board private structure
 **/
static inline void ixgbe_irq_enable(struct ixgbe_adapter *adapter, bool queues,
				    bool flush)
{
	u32 mask = (IXGBE_EIMS_ENABLE_MASK & ~IXGBE_EIMS_RTX_QUEUE);

	/* don't reenable LSC while waiting for link */
	if (adapter->flags & IXGBE_FLAG_NEED_LINK_UPDATE)
		mask &= ~IXGBE_EIMS_LSC;

	if (adapter->flags2 & IXGBE_FLAG2_TEMP_SENSOR_CAPABLE)
		switch (adapter->hw.mac.type) {
		case ixgbe_mac_82599EB:
		case ixgbe_mac_X550EM_a:
			mask |= IXGBE_EIMS_GPI_SDP0_BY_MAC(&adapter->hw);
			break;
		case ixgbe_mac_X540:
		case ixgbe_mac_X550:
			mask |= IXGBE_EIMS_TS;
			break;
		default:
			break;
		}
	if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE)
		mask |= IXGBE_EIMS_GPI_SDP1;
	switch (adapter->hw.mac.type) {
	case ixgbe_mac_82599EB:
		mask |= IXGBE_EIMS_GPI_SDP1;
		mask |= IXGBE_EIMS_GPI_SDP2;
		/* fall through */
	case ixgbe_mac_X540:
	case ixgbe_mac_X550:
	case ixgbe_mac_X550EM_x:
	case ixgbe_mac_X550EM_a:
		if (adapter->hw.device_id == IXGBE_DEV_ID_X550EM_X_SFP ||
		    adapter->hw.device_id == IXGBE_DEV_ID_X550EM_A_SFP ||
		    adapter->hw.device_id == IXGBE_DEV_ID_X550EM_A_SFP_N)
			mask |= IXGBE_EIMS_GPI_SDP0_BY_MAC(&adapter->hw);
		if (adapter->hw.phy.type == ixgbe_phy_x550em_ext_t)
			mask |= IXGBE_EICR_GPI_SDP0_X540;
		mask |= IXGBE_EIMS_ECC;
		mask |= IXGBE_EIMS_MAILBOX;
#ifdef HAVE_PTP_1588_CLOCK
		mask |= IXGBE_EIMS_TIMESYNC;
#endif

		break;
	default:
		break;
	}

	if ((adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) &&
	    !(adapter->flags2 & IXGBE_FLAG2_FDIR_REQUIRES_REINIT))
		mask |= IXGBE_EIMS_FLOW_DIR;

	IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMS, mask);
	if (queues)
		ixgbe_irq_enable_queues(adapter, ~0);
	if (flush)
		IXGBE_WRITE_FLUSH(&adapter->hw);
}

static irqreturn_t ixgbe_msix_other(int __always_unused irq, void *data)
{
	struct ixgbe_adapter *adapter = data;
	struct ixgbe_hw *hw = &adapter->hw;
	u32 eicr;

	/*
	 * Workaround for Silicon errata #26 on 82598.  Use clear-by-write
	 * instead of clear-by-read.  Reading with EICS will return the
	 * interrupt causes without clearing, which later be done
	 * with the write to EICR.
	 */
	eicr = IXGBE_READ_REG(hw, IXGBE_EICS);

	/* The lower 16bits of the EICR register are for the queue interrupts
	 * which should be masked here in order to not accidently clear them if
	 * the bits are high when ixgbe_msix_other is called. There is a race
	 * condition otherwise which results in possible performance loss
	 * especially if the ixgbe_msix_other interrupt is triggering
	 * consistently (as it would when PPS is turned on for the X540 device)
	 */
	eicr &= 0xFFFF0000;

	IXGBE_WRITE_REG(hw, IXGBE_EICR, eicr);

	if (eicr & IXGBE_EICR_LSC)
		ixgbe_check_lsc(adapter);

	if (eicr & IXGBE_EICR_MAILBOX)
		ixgbe_msg_task(adapter);

	switch (hw->mac.type) {
	case ixgbe_mac_82599EB:
	case ixgbe_mac_X540:
	case ixgbe_mac_X550:
	case ixgbe_mac_X550EM_x:
	case ixgbe_mac_X550EM_a:
		if (hw->phy.type == ixgbe_phy_x550em_ext_t &&
		    (eicr & IXGBE_EICR_GPI_SDP0_X540)) {
			adapter->flags2 |= IXGBE_FLAG2_PHY_INTERRUPT;
			ixgbe_service_event_schedule(adapter);
			IXGBE_WRITE_REG(hw, IXGBE_EICR,
					IXGBE_EICR_GPI_SDP0_X540);
		}
		if (eicr & IXGBE_EICR_ECC) {
			e_info(link, "Received unrecoverable ECC Err,"
			       "initiating reset.\n");
			set_bit(__IXGBE_RESET_REQUESTED, &adapter->state);
			ixgbe_service_event_schedule(adapter);
			IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_ECC);
		}
#ifdef HAVE_TX_MQ
		/* Handle Flow Director Full threshold interrupt */
		if (eicr & IXGBE_EICR_FLOW_DIR) {
			int reinit_count = 0;
			int i;
			for (i = 0; i < adapter->num_tx_queues; i++) {
				struct ixgbe_ring *ring = adapter->tx_ring[i];
				if (test_and_clear_bit(
						      __IXGBE_TX_FDIR_INIT_DONE,
						      &ring->state))
					reinit_count++;
			}
			if (reinit_count) {
				/* no more flow director interrupts until
				 * after init
				 */
				IXGBE_WRITE_REG(hw, IXGBE_EIMC,
						IXGBE_EIMC_FLOW_DIR);
				adapter->flags2 |=
					IXGBE_FLAG2_FDIR_REQUIRES_REINIT;
				ixgbe_service_event_schedule(adapter);
			}
		}
#endif
		ixgbe_check_sfp_event(adapter, eicr);
		ixgbe_check_overtemp_event(adapter, eicr);
		break;
	default:
		break;
	}

	ixgbe_check_fan_failure(adapter, eicr);

#ifdef HAVE_PTP_1588_CLOCK
	if (unlikely(eicr & IXGBE_EICR_TIMESYNC))
	    ixgbe_ptp_check_pps_event(adapter);
#endif

	/* re-enable the original interrupt state, no lsc, no queues */
	if (!test_bit(__IXGBE_DOWN, &adapter->state))
		ixgbe_irq_enable(adapter, false, false);

	return IRQ_HANDLED;
}

static irqreturn_t ixgbe_msix_clean_rings(int __always_unused irq, void *data)
{
	struct ixgbe_q_vector *q_vector = data;

	/* EIAM disabled interrupts (on this vector) for us */

	if (q_vector->rx.ring || q_vector->tx.ring)
		napi_schedule_irqoff(&q_vector->napi);

	return IRQ_HANDLED;
}

/**
 * ixgbe_poll - NAPI polling RX/TX cleanup routine
 * @napi: napi struct with our devices info in it
 * @budget: amount of work driver is allowed to do this pass, in packets
 *
 * This function will clean all queues associated with a q_vector.
 **/
int ixgbe_poll(struct napi_struct *napi, int budget)
{
	struct ixgbe_q_vector *q_vector =
			       container_of(napi, struct ixgbe_q_vector, napi);
	struct ixgbe_adapter *adapter = q_vector->adapter;
	struct ixgbe_ring *ring;
	int per_ring_budget, work_done = 0;
	bool clean_complete = true;

#if IS_ENABLED(CONFIG_DCA)
	if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
		ixgbe_update_dca(q_vector);
#endif /* CONFIG_DCA */

	ixgbe_for_each_ring(ring, q_vector->tx)
		clean_complete &= ixgbe_clean_tx_irq(q_vector, ring);

#ifdef HAVE_NDO_BUSY_POLL
	if (test_bit(NAPI_STATE_NPSVC, &napi->state))
		return budget;

	/* Exit if we are called by netpoll or busy polling is active */
	if ((budget <= 0) || !ixgbe_qv_lock_napi(q_vector))
		return budget;
#else
	/* Exit if we are called by netpoll */
	if (budget <= 0)
		return budget;
#endif

	/* attempt to distribute budget to each queue fairly, but don't allow
	 * the budget to go below 1 because we'll exit polling */
	if (q_vector->rx.count > 1)
		per_ring_budget = max(budget/q_vector->rx.count, 1);
	else
		per_ring_budget = budget;

	ixgbe_for_each_ring(ring, q_vector->rx) {
		int cleaned = ixgbe_clean_rx_irq(q_vector, ring,
						 per_ring_budget);
		work_done += cleaned;
		clean_complete &= (cleaned < per_ring_budget);
	}

#ifdef HAVE_NDO_BUSY_POLL
	ixgbe_qv_unlock_napi(q_vector);
#endif

#ifndef HAVE_NETDEV_NAPI_LIST
	if (!netif_running(adapter->netdev))
		clean_complete = true;

#endif
	/* If all work not completed, return budget and keep polling */
	if (!clean_complete)
		return budget;

	/* all work done, exit the polling mode */
	napi_complete_done(napi, work_done);
	if (adapter->rx_itr_setting == 1)
		ixgbe_set_itr(q_vector);
	if (!test_bit(__IXGBE_DOWN, &adapter->state))
		ixgbe_irq_enable_queues(adapter, ((u64)1 << q_vector->v_idx));

	return min(work_done, budget - 1);
}

/**
 * ixgbe_request_msix_irqs - Initialize MSI-X interrupts
 * @adapter: board private structure
 *
 * ixgbe_request_msix_irqs allocates MSI-X vectors and requests
 * interrupts from the kernel.
 **/
static int ixgbe_request_msix_irqs(struct ixgbe_adapter *adapter)
{
	struct net_device *netdev = adapter->netdev;
	unsigned int ri = 0, ti = 0;
	int vector, err;

	for (vector = 0; vector < adapter->num_q_vectors; vector++) {
		struct ixgbe_q_vector *q_vector = adapter->q_vector[vector];
		struct msix_entry *entry = &adapter->msix_entries[vector];

		if (q_vector->tx.ring && q_vector->rx.ring) {
			snprintf(q_vector->name, sizeof(q_vector->name),
				 "%s-TxRx-%u", netdev->name, ri++);
			ti++;
		} else if (q_vector->rx.ring) {
			snprintf(q_vector->name, sizeof(q_vector->name),
				 "%s-rx-%u", netdev->name, ri++);
		} else if (q_vector->tx.ring) {
			snprintf(q_vector->name, sizeof(q_vector->name),
				 "%s-tx-%u", netdev->name, ti++);
		} else {
			/* skip this unused q_vector */
			continue;
		}
		err = request_irq(entry->vector, &ixgbe_msix_clean_rings, 0,
				  q_vector->name, q_vector);
		if (err) {
			e_err(probe, "request_irq failed for MSIX interrupt '%s' "
			      "Error: %d\n", q_vector->name, err);
			goto free_queue_irqs;
		}
#ifdef HAVE_IRQ_AFFINITY_HINT
		/* If Flow Director is enabled, set interrupt affinity */
		if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) {
			/* assign the mask for this irq */
			irq_set_affinity_hint(entry->vector,
					      &q_vector->affinity_mask);
		}
#endif /* HAVE_IRQ_AFFINITY_HINT */
	}

	err = request_irq(adapter->msix_entries[vector].vector,
			  ixgbe_msix_other, 0, netdev->name, adapter);
	if (err) {
		e_err(probe, "request_irq for msix_other failed: %d\n", err);
		goto free_queue_irqs;
	}

	return IXGBE_SUCCESS;

free_queue_irqs:
	while (vector) {
		vector--;
#ifdef HAVE_IRQ_AFFINITY_HINT
		irq_set_affinity_hint(adapter->msix_entries[vector].vector,
				      NULL);
#endif
		free_irq(adapter->msix_entries[vector].vector,
			 adapter->q_vector[vector]);
	}
	adapter->flags &= ~IXGBE_FLAG_MSIX_ENABLED;
	pci_disable_msix(adapter->pdev);
	kfree(adapter->msix_entries);
	adapter->msix_entries = NULL;
	return err;
}

/**
 * ixgbe_intr - legacy mode Interrupt Handler
 * @irq: interrupt number
 * @data: pointer to a network interface device structure
 **/
static irqreturn_t ixgbe_intr(int __always_unused irq, void *data)
{
	struct ixgbe_adapter *adapter = data;
	struct ixgbe_hw *hw = &adapter->hw;
	struct ixgbe_q_vector *q_vector = adapter->q_vector[0];
	u32 eicr;

	/*
	 * Workaround for silicon errata #26 on 82598.  Mask the interrupt
	 * before the read of EICR.
	 */
	IXGBE_WRITE_REG(hw, IXGBE_EIMC, IXGBE_IRQ_CLEAR_MASK);

	/* for NAPI, using EIAM to auto-mask tx/rx interrupt bits on read
	 * therefore no explicit interrupt disable is necessary */
	eicr = IXGBE_READ_REG(hw, IXGBE_EICR);
	if (!eicr) {
		/*
		 * shared interrupt alert!
		 * make sure interrupts are enabled because the read will
		 * have disabled interrupts due to EIAM
		 * finish the workaround of silicon errata on 82598.  Unmask
		 * the interrupt that we masked before the EICR read.
		 */
		if (!test_bit(__IXGBE_DOWN, &adapter->state))
			ixgbe_irq_enable(adapter, true, true);
		return IRQ_NONE;	/* Not our interrupt */
	}

	if (eicr & IXGBE_EICR_LSC)
		ixgbe_check_lsc(adapter);

	switch (hw->mac.type) {
	case ixgbe_mac_82599EB:
	case ixgbe_mac_X540:
	case ixgbe_mac_X550:
	case ixgbe_mac_X550EM_x:
	case ixgbe_mac_X550EM_a:

		if (eicr & IXGBE_EICR_ECC) {
			e_info(link, "Received unrecoverable ECC Err,"
			       "initiating reset.\n");
			set_bit(__IXGBE_RESET_REQUESTED, &adapter->state);
			ixgbe_service_event_schedule(adapter);
			IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_ECC);
		}
		ixgbe_check_sfp_event(adapter, eicr);
		ixgbe_check_overtemp_event(adapter, eicr);
		break;
	default:
		break;
	}

	ixgbe_check_fan_failure(adapter, eicr);
#ifdef HAVE_PTP_1588_CLOCK
	if (unlikely(eicr & IXGBE_EICR_TIMESYNC))
	    ixgbe_ptp_check_pps_event(adapter);
#endif

	/* would disable interrupts here but EIAM disabled it */
	napi_schedule_irqoff(&q_vector->napi);

	/*
	 * re-enable link(maybe) and non-queue interrupts, no flush.
	 * ixgbe_poll will re-enable the queue interrupts
	 */
	if (!test_bit(__IXGBE_DOWN, &adapter->state))
		ixgbe_irq_enable(adapter, false, false);

	return IRQ_HANDLED;
}

/**
 * ixgbe_request_irq - initialize interrupts
 * @adapter: board private structure
 *
 * Attempts to configure interrupts using the best available
 * capabilities of the hardware and kernel.
 **/
static int ixgbe_request_irq(struct ixgbe_adapter *adapter)
{
	struct net_device *netdev = adapter->netdev;
	int err;

	if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED)
		err = ixgbe_request_msix_irqs(adapter);
	else if (adapter->flags & IXGBE_FLAG_MSI_ENABLED)
		err = request_irq(adapter->pdev->irq, &ixgbe_intr, 0,
				  netdev->name, adapter);
	else
		err = request_irq(adapter->pdev->irq, &ixgbe_intr, IRQF_SHARED,
				  netdev->name, adapter);

	if (err)
		e_err(probe, "request_irq failed, Error %d\n", err);

	return err;
}

static void ixgbe_free_irq(struct ixgbe_adapter *adapter)
{
	int vector;

	if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED)) {
		free_irq(adapter->pdev->irq, adapter);
		return;
	}

	if (!adapter->msix_entries)
		return;

	for (vector = 0; vector < adapter->num_q_vectors; vector++) {
		struct ixgbe_q_vector *q_vector = adapter->q_vector[vector];
		struct msix_entry *entry = &adapter->msix_entries[vector];

		/* free only the irqs that were actually requested */
		if (!q_vector->rx.ring && !q_vector->tx.ring)
			continue;

#ifdef HAVE_IRQ_AFFINITY_HINT
		/* clear the affinity_mask in the IRQ descriptor */
		irq_set_affinity_hint(entry->vector, NULL);

#endif
		free_irq(entry->vector, q_vector);
	}

	free_irq(adapter->msix_entries[vector].vector, adapter);
}

/**
 * ixgbe_irq_disable - Mask off interrupt generation on the NIC
 * @adapter: board private structure
 **/
static inline void ixgbe_irq_disable(struct ixgbe_adapter *adapter)
{
	switch (adapter->hw.mac.type) {
	case ixgbe_mac_82598EB:
		IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC, ~0);
		break;
	case ixgbe_mac_82599EB:
	case ixgbe_mac_X540:
	case ixgbe_mac_X550:
	case ixgbe_mac_X550EM_x:
	case ixgbe_mac_X550EM_a:
		IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC, 0xFFFF0000);
		IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC_EX(0), ~0);
		IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC_EX(1), ~0);
		break;
	default:
		break;
	}
	IXGBE_WRITE_FLUSH(&adapter->hw);
	if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
		int vector;

		for (vector = 0; vector < adapter->num_q_vectors; vector++)
			synchronize_irq(adapter->msix_entries[vector].vector);

		synchronize_irq(adapter->msix_entries[vector++].vector);
	} else {
		synchronize_irq(adapter->pdev->irq);
	}
}

/**
 * ixgbe_configure_msi_and_legacy - Initialize PIN (INTA...) and MSI interrupts
 *
 **/
static void ixgbe_configure_msi_and_legacy(struct ixgbe_adapter *adapter)
{
	struct ixgbe_q_vector *q_vector = adapter->q_vector[0];

	ixgbe_write_eitr(q_vector);

	ixgbe_set_ivar(adapter, 0, 0, 0);
	ixgbe_set_ivar(adapter, 1, 0, 0);

	e_info(hw, "Legacy interrupt IVAR setup done\n");
}

/**
 * ixgbe_configure_tx_ring - Configure 8259x Tx ring after Reset
 * @adapter: board private structure
 * @ring: structure containing ring specific data
 *
 * Configure the Tx descriptor ring after a reset.
 **/
void ixgbe_configure_tx_ring(struct ixgbe_adapter *adapter,
			     struct ixgbe_ring *ring)
{
	struct ixgbe_hw *hw = &adapter->hw;
	u64 tdba = ring->dma;
	int wait_loop = 10;
	u32 txdctl = IXGBE_TXDCTL_ENABLE;
	u8 reg_idx = ring->reg_idx;

	/* disable queue to avoid issues while updating state */
	IXGBE_WRITE_REG(hw, IXGBE_TXDCTL(reg_idx), IXGBE_TXDCTL_SWFLSH);
	IXGBE_WRITE_FLUSH(hw);

	IXGBE_WRITE_REG(hw, IXGBE_TDBAL(reg_idx), tdba & DMA_BIT_MASK(32));
	IXGBE_WRITE_REG(hw, IXGBE_TDBAH(reg_idx), tdba >> 32);
	IXGBE_WRITE_REG(hw, IXGBE_TDLEN(reg_idx),
			ring->count * sizeof(union ixgbe_adv_tx_desc));

	/* disable head writeback */
	IXGBE_WRITE_REG(hw, IXGBE_TDWBAH(reg_idx), 0);
	IXGBE_WRITE_REG(hw, IXGBE_TDWBAL(reg_idx), 0);

	/* reset head and tail pointers */
	IXGBE_WRITE_REG(hw, IXGBE_TDH(reg_idx), 0);
	IXGBE_WRITE_REG(hw, IXGBE_TDT(reg_idx), 0);
	ring->tail = adapter->io_addr + IXGBE_TDT(reg_idx);

	/* reset ntu and ntc to place SW in sync with hardwdare */
	ring->next_to_clean = 0;
	ring->next_to_use = 0;

	/*
	 * set WTHRESH to encourage burst writeback, it should not be set
	 * higher than 1 when:
	 * - ITR is 0 as it could cause false TX hangs
	 * - ITR is set to > 100k int/sec and BQL is enabled
	 *
	 * In order to avoid issues WTHRESH + PTHRESH should always be equal
	 * to or less than the number of on chip descriptors, which is
	 * currently 40.
	 */
	if (!ring->q_vector || (ring->q_vector->itr < IXGBE_100K_ITR))
		txdctl |= (1 << 16);	/* WTHRESH = 1 */
	else
		txdctl |= (8 << 16);	/* WTHRESH = 8 */

	/*
	 * Setting PTHRESH to 32 both improves performance
	 * and avoids a TX hang with DFP enabled
	 */
	txdctl |= (1 << 8) |	/* HTHRESH = 1 */
		   32;		/* PTHRESH = 32 */

	/* reinitialize flowdirector state */
	if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) {
		ring->atr_sample_rate = adapter->atr_sample_rate;
		ring->atr_count = 0;
		set_bit(__IXGBE_TX_FDIR_INIT_DONE, &ring->state);
	} else {
		ring->atr_sample_rate = 0;
	}

	/* initialize XPS */
	if (!test_and_set_bit(__IXGBE_TX_XPS_INIT_DONE, &ring->state)) {
		struct ixgbe_q_vector *q_vector = ring->q_vector;

		if (q_vector)
			netif_set_xps_queue(adapter->netdev,
					    &q_vector->affinity_mask,
					    ring->queue_index);
	}

	clear_bit(__IXGBE_HANG_CHECK_ARMED, &ring->state);

	/* reinitialize tx_buffer_info */
	memset(ring->tx_buffer_info, 0,
	       sizeof(struct ixgbe_tx_buffer) * ring->count);

	/* enable queue */
	IXGBE_WRITE_REG(hw, IXGBE_TXDCTL(reg_idx), txdctl);

	/* TXDCTL.EN will return 0 on 82598 if link is down, so skip it */
	if (hw->mac.type == ixgbe_mac_82598EB &&
	    !(IXGBE_READ_REG(hw, IXGBE_LINKS) & IXGBE_LINKS_UP))
		return;

	/* poll to verify queue is enabled */
	do {
		msleep(1);
		txdctl = IXGBE_READ_REG(hw, IXGBE_TXDCTL(reg_idx));
	} while (--wait_loop && !(txdctl & IXGBE_TXDCTL_ENABLE));
	if (!wait_loop)
		hw_dbg(hw, "Could not enable Tx Queue %d\n", reg_idx);
}

static void ixgbe_setup_mtqc(struct ixgbe_adapter *adapter)
{
	struct ixgbe_hw *hw = &adapter->hw;
	u32 rttdcs, mtqc;
	u8 tcs = netdev_get_num_tc(adapter->netdev);

	if (hw->mac.type == ixgbe_mac_82598EB)
		return;

	/* disable the arbiter while setting MTQC */
	rttdcs = IXGBE_READ_REG(hw, IXGBE_RTTDCS);
	rttdcs |= IXGBE_RTTDCS_ARBDIS;
	IXGBE_WRITE_REG(hw, IXGBE_RTTDCS, rttdcs);

	/* set transmit pool layout */
	if (adapter->flags & IXGBE_FLAG_VMDQ_ENABLED) {
		mtqc = IXGBE_MTQC_VT_ENA;
		if (tcs > 4)
			mtqc |= IXGBE_MTQC_RT_ENA | IXGBE_MTQC_8TC_8TQ;
		else if (tcs > 1)
			mtqc |= IXGBE_MTQC_RT_ENA | IXGBE_MTQC_4TC_4TQ;
		else if (adapter->ring_feature[RING_F_VMDQ].mask ==
			 IXGBE_82599_VMDQ_4Q_MASK)
			mtqc |= IXGBE_MTQC_32VF;
		else
			mtqc |= IXGBE_MTQC_64VF;
	} else {
		if (tcs > 4)
			mtqc = IXGBE_MTQC_RT_ENA | IXGBE_MTQC_8TC_8TQ;
		else if (tcs > 1)
			mtqc = IXGBE_MTQC_RT_ENA | IXGBE_MTQC_4TC_4TQ;
		else
			mtqc = IXGBE_MTQC_64Q_1PB;
	}

	IXGBE_WRITE_REG(hw, IXGBE_MTQC, mtqc);

	/* Enable Security TX Buffer IFG for multiple pb */
	if (tcs) {
		u32 sectx = IXGBE_READ_REG(hw, IXGBE_SECTXMINIFG);
		sectx |= IXGBE_SECTX_DCB;
		IXGBE_WRITE_REG(hw, IXGBE_SECTXMINIFG, sectx);
	}

	/* re-enable the arbiter */
	rttdcs &= ~IXGBE_RTTDCS_ARBDIS;
	IXGBE_WRITE_REG(hw, IXGBE_RTTDCS, rttdcs);
}

/**
 * ixgbe_configure_tx - Configure 8259x Transmit Unit after Reset
 * @adapter: board private structure
 *
 * Configure the Tx unit of the MAC after a reset.
 **/
static void ixgbe_configure_tx(struct ixgbe_adapter *adapter)
{
	struct ixgbe_hw *hw = &adapter->hw;
	u32 dmatxctl;
	u32 i;

#ifdef CONFIG_NETDEVICES_MULTIQUEUE
	if (adapter->num_tx_queues > 1)
		adapter->netdev->features |= NETIF_F_MULTI_QUEUE;
	else
		adapter->netdev->features &= ~NETIF_F_MULTI_QUEUE;

#endif
	ixgbe_setup_mtqc(adapter);

	if (hw->mac.type != ixgbe_mac_82598EB) {
		/* DMATXCTL.EN must be before Tx queues are enabled */
		dmatxctl = IXGBE_READ_REG(hw, IXGBE_DMATXCTL);
		dmatxctl |= IXGBE_DMATXCTL_TE;
		IXGBE_WRITE_REG(hw, IXGBE_DMATXCTL, dmatxctl);
	}

	/* Setup the HW Tx Head and Tail descriptor pointers */
	for (i = 0; i < adapter->num_tx_queues; i++)
		ixgbe_configure_tx_ring(adapter, adapter->tx_ring[i]);
}

static void ixgbe_enable_rx_drop(struct ixgbe_adapter *adapter,
				 struct ixgbe_ring *ring)
{
	struct ixgbe_hw *hw = &adapter->hw;
	u8 reg_idx = ring->reg_idx;
	u32 srrctl = IXGBE_READ_REG(hw, IXGBE_SRRCTL(reg_idx));

	srrctl |= IXGBE_SRRCTL_DROP_EN;

	IXGBE_WRITE_REG(hw, IXGBE_SRRCTL(reg_idx), srrctl);
}

static void ixgbe_disable_rx_drop(struct ixgbe_adapter *adapter,
				  struct ixgbe_ring *ring)
{
	struct ixgbe_hw *hw = &adapter->hw;
	u8 reg_idx = ring->reg_idx;
	u32 srrctl = IXGBE_READ_REG(hw, IXGBE_SRRCTL(reg_idx));

	srrctl &= ~IXGBE_SRRCTL_DROP_EN;

	IXGBE_WRITE_REG(hw, IXGBE_SRRCTL(reg_idx), srrctl);
}

void ixgbe_set_rx_drop_en(struct ixgbe_adapter *adapter)
{
	int i;
	bool pfc_en = adapter->dcb_cfg.pfc_mode_enable;

#ifdef HAVE_DCBNL_IEEE
	if (adapter->ixgbe_ieee_pfc)
		pfc_en |= !!(adapter->ixgbe_ieee_pfc->pfc_en);

#endif
	/*
	 * We should set the drop enable bit if:
	 *  SR-IOV is enabled
	 *   or
	 *  Number of Rx queues > 1 and flow control is disabled
	 *
	 *  This allows us to avoid head of line blocking for security
	 *  and performance reasons.
	 */
	if (adapter->num_vfs || (adapter->num_rx_queues > 1 &&
	    !(adapter->hw.fc.current_mode & ixgbe_fc_tx_pause) && !pfc_en)) {
		for (i = 0; i < adapter->num_rx_queues; i++)
			ixgbe_enable_rx_drop(adapter, adapter->rx_ring[i]);
	} else {
		for (i = 0; i < adapter->num_rx_queues; i++)
			ixgbe_disable_rx_drop(adapter, adapter->rx_ring[i]);
	}
}

static void ixgbe_configure_srrctl(struct ixgbe_adapter *adapter,
				   struct ixgbe_ring *rx_ring)
{
	struct ixgbe_hw *hw = &adapter->hw;
	u32 srrctl;
	u8 reg_idx = rx_ring->reg_idx;

	if (hw->mac.type == ixgbe_mac_82598EB) {
		u16 mask = adapter->ring_feature[RING_F_RSS].mask;

		/* program one srrctl register per VMDq index */
		if (adapter->flags & IXGBE_FLAG_VMDQ_ENABLED)
			mask = adapter->ring_feature[RING_F_VMDQ].mask;

		/*
		 * if VMDq is not active we must program one srrctl register
		 * per RSS queue since we have enabled RDRXCTL.MVMEN
		 */
		reg_idx &= mask;

		/* divide by the first bit of the mask to get the indices */
		if (reg_idx)
			reg_idx /= ((~mask) + 1) & mask;
	}

	/* configure header buffer length, needed for RSC */
	srrctl = IXGBE_RX_HDR_SIZE << IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT;

	/* configure the packet buffer length */
#ifdef CONFIG_IXGBE_DISABLE_PACKET_SPLIT
	srrctl |= ALIGN(rx_ring->rx_buf_len, 1024) >>
		  IXGBE_SRRCTL_BSIZEPKT_SHIFT;
#else
	if (test_bit(__IXGBE_RX_3K_BUFFER, &rx_ring->state))
		srrctl |= IXGBE_RXBUFFER_3K >> IXGBE_SRRCTL_BSIZEPKT_SHIFT;
	else
		srrctl |= IXGBE_RXBUFFER_2K >> IXGBE_SRRCTL_BSIZEPKT_SHIFT;
#endif

	/* configure descriptor type */
	srrctl |= IXGBE_SRRCTL_DESCTYPE_ADV_ONEBUF;

	IXGBE_WRITE_REG(hw, IXGBE_SRRCTL(reg_idx), srrctl);
}

/**
 * ixgbe_rss_indir_tbl_entries - Return RSS indirection table entries
 * @adapter: device handle
 *
 *  - 82598/82599/X540:     128
 *  - X550(non-SRIOV mode): 512
 *  - X550(SRIOV mode):     64
 */
u32 ixgbe_rss_indir_tbl_entries(struct ixgbe_adapter *adapter)
{
	if (adapter->hw.mac.type < ixgbe_mac_X550)
		return 128;
	else if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)
		return 64;
	else
		return 512;
}

/**
 * ixgbe_store_key - Write the RSS key to HW
 * @adapter: device handle
 *
 * Write the RSS key stored in adapter.rss_key to HW.
 */
void ixgbe_store_key(struct ixgbe_adapter *adapter)
{
	struct ixgbe_hw *hw = &adapter->hw;
	int i;

	for (i = 0; i < 10; i++)
		IXGBE_WRITE_REG(hw, IXGBE_RSSRK(i), adapter->rss_key[i]);
}

/**
 * ixgbe_init_rss_key - Initialize adapter RSS key
 * @adapter: device handle
 *
 * Allocates and initializes the RSS key if it is not allocated.
 **/
static inline int ixgbe_init_rss_key(struct ixgbe_adapter *adapter)
{
	u32 *rss_key;

	if (!adapter->rss_key) {
		rss_key = kzalloc(IXGBE_RSS_KEY_SIZE, GFP_KERNEL);
		if (unlikely(!rss_key))
			return -ENOMEM;

		netdev_rss_key_fill(rss_key, IXGBE_RSS_KEY_SIZE);
		adapter->rss_key = rss_key;
	}

	return 0;
}

/**
 * ixgbe_store_reta - Write the RETA table to HW
 * @adapter: device handle
 *
 * Write the RSS redirection table stored in adapter.rss_indir_tbl[] to HW.
 */
void ixgbe_store_reta(struct ixgbe_adapter *adapter)
{
	u32 i, reta_entries = ixgbe_rss_indir_tbl_entries(adapter);
	struct ixgbe_hw *hw = &adapter->hw;
	u32 reta = 0;
	u32 indices_multi;
	u8 *indir_tbl = adapter->rss_indir_tbl;

	/* Fill out the redirection table as follows:
	 *  - 82598:      8 bit wide entries containing pair of 4 bit RSS
	 *    indices.
	 *  - 82599/X540: 8 bit wide entries containing 4 bit RSS index
	 *  - X550:       8 bit wide entries containing 6 bit RSS index
	 */
	if (adapter->hw.mac.type == ixgbe_mac_82598EB)
		indices_multi = 0x11;
	else
		indices_multi = 0x1;

	/* Write redirection table to HW */
	for (i = 0; i < reta_entries; i++) {
		reta |= indices_multi * indir_tbl[i] << (i & 0x3) * 8;
		if ((i & 3) == 3) {
			if (i < 128)
				IXGBE_WRITE_REG(hw, IXGBE_RETA(i >> 2), reta);
			else
				IXGBE_WRITE_REG(hw, IXGBE_ERETA((i >> 2) - 32),
						reta);
			reta = 0;
		}
	}
}

/**
 * ixgbe_store_vfreta - Write the RETA table to HW (x550 devices in SRIOV mode)
 * @adapter: device handle
 *
 * Write the RSS redirection table stored in adapter.rss_indir_tbl[] to HW.
 */
static void ixgbe_store_vfreta(struct ixgbe_adapter *adapter)
{
	u32 i, reta_entries = ixgbe_rss_indir_tbl_entries(adapter);
	struct ixgbe_hw *hw = &adapter->hw;
	u32 vfreta = 0;
	unsigned int pf_pool = adapter->num_vfs;

	/* Write redirection table to HW */
	for (i = 0; i < reta_entries; i++) {
		vfreta |= (u32)adapter->rss_indir_tbl[i] << (i & 0x3) * 8;
		if ((i & 3) == 3) {
			IXGBE_WRITE_REG(hw, IXGBE_PFVFRETA(i >> 2, pf_pool),
					vfreta);
			vfreta = 0;
		}
	}
}

static void ixgbe_setup_reta(struct ixgbe_adapter *adapter)
{
	u32 i, j;
	u32 reta_entries = ixgbe_rss_indir_tbl_entries(adapter);
	u16 rss_i = adapter->ring_feature[RING_F_RSS].indices;

	/* Program table for at least 4 queues w/ SR-IOV so that VFs can
	 * make full use of any rings they may have.  We will use the
	 * PSRTYPE register to control how many rings we use within the PF.
	 */
	if ((adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) && (rss_i < 4))
		rss_i = 4;

	/* Fill out hash function seeds */
	ixgbe_store_key(adapter);

	/* Fill out redirection table */
	memset(adapter->rss_indir_tbl, 0, sizeof(adapter->rss_indir_tbl));

	for (i = 0, j = 0; i < reta_entries; i++, j++) {
		if (j == rss_i)
			j = 0;

		adapter->rss_indir_tbl[i] = j;
	}

	ixgbe_store_reta(adapter);
}

static void ixgbe_setup_vfreta(struct ixgbe_adapter *adapter)
{
	struct ixgbe_hw *hw = &adapter->hw;
	u16 rss_i = adapter->ring_feature[RING_F_RSS].indices;
	unsigned int pf_pool = adapter->num_vfs;
	int i, j;

	/* Fill out hash function seeds */
	for (i = 0; i < 10; i++)
		IXGBE_WRITE_REG(hw, IXGBE_PFVFRSSRK(i, pf_pool),
				*(adapter->rss_key + i));

	/* Fill out the redirection table */
	for (i = 0, j = 0; i < 64; i++, j++) {
		if (j == rss_i)
			j = 0;

		adapter->rss_indir_tbl[i] = j;
	}

	ixgbe_store_vfreta(adapter);
}


static void ixgbe_setup_mrqc(struct ixgbe_adapter *adapter)
{
	struct ixgbe_hw *hw = &adapter->hw;
	u32 rxcsum;
	u32 mrqc = 0, rss_field = 0;
	u32 vfmrqc = 0;

	/* Disable indicating checksum in descriptor, enables RSS hash */
	rxcsum = IXGBE_READ_REG(hw, IXGBE_RXCSUM);
	rxcsum |= IXGBE_RXCSUM_PCSD;
	IXGBE_WRITE_REG(hw, IXGBE_RXCSUM, rxcsum);

	if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
		if (adapter->ring_feature[RING_F_RSS].mask)
			mrqc = IXGBE_MRQC_RSSEN;
	} else {
		u8 tcs = netdev_get_num_tc(adapter->netdev);

		if (adapter->flags & IXGBE_FLAG_VMDQ_ENABLED) {
			if (tcs > 4)
				mrqc = IXGBE_MRQC_VMDQRT8TCEN;	/* 8 TCs */
			else if (tcs > 1)
				mrqc = IXGBE_MRQC_VMDQRT4TCEN;	/* 4 TCs */
			else if (adapter->ring_feature[RING_F_VMDQ].mask ==
				 IXGBE_82599_VMDQ_4Q_MASK)
				mrqc = IXGBE_MRQC_VMDQRSS32EN;
			else
				mrqc = IXGBE_MRQC_VMDQRSS64EN;
		} else {
			if (tcs > 4)
				mrqc = IXGBE_MRQC_RTRSS8TCEN;
			else if (tcs > 1)
				mrqc = IXGBE_MRQC_RTRSS4TCEN;
			else
				mrqc = IXGBE_MRQC_RSSEN;
		}

		/* Enable L3/L4 for Tx Switched packets */
		mrqc |= IXGBE_MRQC_L3L4TXSWEN;
	}

	/* Perform hash on these packet types */
	rss_field = IXGBE_MRQC_RSS_FIELD_IPV4 |
		     IXGBE_MRQC_RSS_FIELD_IPV4_TCP |
		     IXGBE_MRQC_RSS_FIELD_IPV6 |
		     IXGBE_MRQC_RSS_FIELD_IPV6_TCP;

	if (adapter->flags2 & IXGBE_FLAG2_RSS_FIELD_IPV4_UDP)
		rss_field |= IXGBE_MRQC_RSS_FIELD_IPV4_UDP;
	if (adapter->flags2 & IXGBE_FLAG2_RSS_FIELD_IPV6_UDP)
		rss_field |= IXGBE_MRQC_RSS_FIELD_IPV6_UDP;

	if ((hw->mac.type >= ixgbe_mac_X550) &&
	    (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)) {
		unsigned int pf_pool = adapter->num_vfs;

		/* Enable VF RSS mode */
		mrqc |= IXGBE_MRQC_MULTIPLE_RSS;
		IXGBE_WRITE_REG(hw, IXGBE_MRQC, mrqc);

		/* Setup RSS through the VF registers */
		ixgbe_setup_vfreta(adapter);
		vfmrqc = IXGBE_MRQC_RSSEN;
		vfmrqc |= rss_field;
		IXGBE_WRITE_REG(hw, IXGBE_PFVFMRQC(pf_pool), vfmrqc);
	} else {
		ixgbe_setup_reta(adapter);
		mrqc |= rss_field;
		IXGBE_WRITE_REG(hw, IXGBE_MRQC, mrqc);
	}
}

/**
 * ixgbe_clear_rscctl - disable RSC for the indicated ring
 * @adapter: address of board private structure
 * @ring: structure containing ring specific data
 **/
void ixgbe_clear_rscctl(struct ixgbe_adapter *adapter,
			struct ixgbe_ring *ring)
{
	struct ixgbe_hw *hw = &adapter->hw;
	u32 rscctrl;
	u8 reg_idx = ring->reg_idx;

	rscctrl = IXGBE_READ_REG(hw, IXGBE_RSCCTL(reg_idx));
	rscctrl &= ~IXGBE_RSCCTL_RSCEN;
	IXGBE_WRITE_REG(hw, IXGBE_RSCCTL(reg_idx), rscctrl);

	clear_ring_rsc_enabled(ring);
}

/**
 * ixgbe_configure_rscctl - enable RSC for the indicated ring
 * @adapter:    address of board private structure
 * @ring: structure containing ring specific data
 **/
void ixgbe_configure_rscctl(struct ixgbe_adapter *adapter,
			    struct ixgbe_ring *ring)
{
	struct ixgbe_hw *hw = &adapter->hw;
	u32 rscctrl;
	u8 reg_idx = ring->reg_idx;

	if (!ring_is_rsc_enabled(ring))
		return;

	rscctrl = IXGBE_READ_REG(hw, IXGBE_RSCCTL(reg_idx));
	rscctrl |= IXGBE_RSCCTL_RSCEN;
	/*
	 * we must limit the number of descriptors so that the
	 * total size of max desc * buf_len is not greater
	 * than 65536
	 */
#ifndef CONFIG_IXGBE_DISABLE_PACKET_SPLIT
#if (MAX_SKB_FRAGS >= 16)
	rscctrl |= IXGBE_RSCCTL_MAXDESC_16;
#elif (MAX_SKB_FRAGS >= 8)
	rscctrl |= IXGBE_RSCCTL_MAXDESC_8;
#elif (MAX_SKB_FRAGS >= 4)
	rscctrl |= IXGBE_RSCCTL_MAXDESC_4;
#else
	rscctrl |= IXGBE_RSCCTL_MAXDESC_1;
#endif
#else /* CONFIG_IXGBE_DISABLE_PACKET_SPLIT */
	if (ring->rx_buf_len <= IXGBE_RXBUFFER_4K)
		rscctrl |= IXGBE_RSCCTL_MAXDESC_16;
	else if (ring->rx_buf_len <= IXGBE_RXBUFFER_8K)
		rscctrl |= IXGBE_RSCCTL_MAXDESC_8;
	else
		rscctrl |= IXGBE_RSCCTL_MAXDESC_4;
#endif /* !CONFIG_IXGBE_DISABLE_PACKET_SPLIT */
	IXGBE_WRITE_REG(hw, IXGBE_RSCCTL(reg_idx), rscctrl);
}

static void ixgbe_rx_desc_queue_enable(struct ixgbe_adapter *adapter,
				       struct ixgbe_ring *ring)
{
	struct ixgbe_hw *hw = &adapter->hw;
	int wait_loop = IXGBE_MAX_RX_DESC_POLL;
	u32 rxdctl;
	u8 reg_idx = ring->reg_idx;

	if (IXGBE_REMOVED(hw->hw_addr))
		return;
	/* RXDCTL.EN will return 0 on 82598 if link is down, so skip it */
	if (hw->mac.type == ixgbe_mac_82598EB &&
	    !(IXGBE_READ_REG(hw, IXGBE_LINKS) & IXGBE_LINKS_UP))
		return;

	do {
		msleep(1);
		rxdctl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(reg_idx));
	} while (--wait_loop && !(rxdctl & IXGBE_RXDCTL_ENABLE));

	if (!wait_loop) {
		e_err(drv, "RXDCTL.ENABLE on Rx queue %d "
		      "not set within the polling period\n", reg_idx);
	}
}

void ixgbe_disable_rx_queue(struct ixgbe_adapter *adapter,
			    struct ixgbe_ring *ring)
{
	struct ixgbe_hw *hw = &adapter->hw;
	int wait_loop = IXGBE_MAX_RX_DESC_POLL;
	u32 rxdctl;
	u8 reg_idx = ring->reg_idx;

	if (IXGBE_REMOVED(hw->hw_addr))
		return;
	rxdctl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(reg_idx));
	rxdctl &= ~IXGBE_RXDCTL_ENABLE;

	/* write value back with RXDCTL.ENABLE bit cleared */
	IXGBE_WRITE_REG(hw, IXGBE_RXDCTL(reg_idx), rxdctl);

	if (hw->mac.type == ixgbe_mac_82598EB &&
	    !(IXGBE_READ_REG(hw, IXGBE_LINKS) & IXGBE_LINKS_UP))
		return;

	/* the hardware may take up to 100us to really disable the rx queue */
	do {
		udelay(10);
		rxdctl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(reg_idx));
	} while (--wait_loop && (rxdctl & IXGBE_RXDCTL_ENABLE));

	if (!wait_loop) {
		e_err(drv, "RXDCTL.ENABLE on Rx queue %d not cleared within "
		      "the polling period\n", reg_idx);
	}
}

void ixgbe_configure_rx_ring(struct ixgbe_adapter *adapter,
			     struct ixgbe_ring *ring)
{
	struct ixgbe_hw *hw = &adapter->hw;
	union ixgbe_adv_rx_desc *rx_desc;
	u64 rdba = ring->dma;
	u32 rxdctl;
	u8 reg_idx = ring->reg_idx;

	/* disable queue to avoid issues while updating state */
	rxdctl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(reg_idx));
	ixgbe_disable_rx_queue(adapter, ring);

	IXGBE_WRITE_REG(hw, IXGBE_RDBAL(reg_idx), rdba & DMA_BIT_MASK(32));
	IXGBE_WRITE_REG(hw, IXGBE_RDBAH(reg_idx), rdba >> 32);
	IXGBE_WRITE_REG(hw, IXGBE_RDLEN(reg_idx),
			ring->count * sizeof(union ixgbe_adv_rx_desc));
	/* Force flushing of IXGBE_RDLEN to prevent MDD */
	IXGBE_WRITE_FLUSH(hw);

	/* reset head and tail pointers */
	IXGBE_WRITE_REG(hw, IXGBE_RDH(reg_idx), 0);
	IXGBE_WRITE_REG(hw, IXGBE_RDT(reg_idx), 0);
	ring->tail = adapter->io_addr + IXGBE_RDT(reg_idx);

	/* reset ntu and ntc to place SW in sync with hardwdare */
	ring->next_to_clean = 0;
	ring->next_to_use = 0;
#ifndef CONFIG_IXGBE_DISABLE_PACKET_SPLIT
	ring->next_to_alloc = 0;
#endif

	ixgbe_configure_srrctl(adapter, ring);
        /* In ESX, RSCCTL configuration is done by on demand */
	ixgbe_configure_rscctl(adapter, ring);

	switch (hw->mac.type) {
	case ixgbe_mac_82598EB:
		/*
		 * enable cache line friendly hardware writes:
		 * PTHRESH=32 descriptors (half the internal cache),
		 * this also removes ugly rx_no_buffer_count increment
		 * HTHRESH=4 descriptors (to minimize latency on fetch)
		 * WTHRESH=8 burst writeback up to two cache lines
		 */
		rxdctl &= ~0x3FFFFF;
		rxdctl |=  0x080420;
		break;
	case ixgbe_mac_X540:
	case ixgbe_mac_X550:
	case ixgbe_mac_X550EM_x:
	case ixgbe_mac_X550EM_a:
#ifndef CONFIG_IXGBE_DISABLE_PACKET_SPLIT
#if (PAGE_SIZE < 8192)
		rxdctl &= ~(IXGBE_RXDCTL_RLPMLMASK |
			    IXGBE_RXDCTL_RLPML_EN);

		/* Limit the maximum frame size so we don't overrun the skb */
		if (ring_uses_build_skb(ring) &&
		    !test_bit(__IXGBE_RX_3K_BUFFER, &ring->state))
			rxdctl |= IXGBE_MAX_2K_FRAME_BUILD_SKB |
				  IXGBE_RXDCTL_RLPML_EN;
#endif
#else /* CONFIG_IXGBE_DISABLE_PACKET_SPLIT */
		/* If operating in IOV mode set RLPML */
		if (!(adapter->flags & IXGBE_FLAG_SRIOV_ENABLED))
			break;
		rxdctl |= ring->rx_buf_len | IXGBE_RXDCTL_RLPML_EN;
#endif /* CONFIG_IXGBE_DISABLE_PACKET_SPLIT */
		break;
	default:
		break;
	}

	/* initialize rx_buffer_info */
	memset(ring->rx_buffer_info, 0,
	       sizeof(struct ixgbe_rx_buffer) * ring->count);

	/* initialize Rx descriptor 0 */
	rx_desc = IXGBE_RX_DESC(ring, 0);
	rx_desc->wb.upper.length = 0;

	/* enable receive descriptor ring */
	rxdctl |= IXGBE_RXDCTL_ENABLE;
	IXGBE_WRITE_REG(hw, IXGBE_RXDCTL(reg_idx), rxdctl);

	ixgbe_rx_desc_queue_enable(adapter, ring);
	ixgbe_alloc_rx_buffers(ring, ixgbe_desc_unused(ring));
}

static void ixgbe_setup_psrtype(struct ixgbe_adapter *adapter)
{
	struct ixgbe_hw *hw = &adapter->hw;
	int rss_i = adapter->ring_feature[RING_F_RSS].indices;
	int p;

	/* PSRTYPE must be initialized in non 82598 adapters */
	u32 psrtype = IXGBE_PSRTYPE_TCPHDR |
		      IXGBE_PSRTYPE_UDPHDR |
		      IXGBE_PSRTYPE_IPV4HDR |
		      IXGBE_PSRTYPE_L2HDR |
		      IXGBE_PSRTYPE_IPV6HDR;

	if (hw->mac.type == ixgbe_mac_82598EB)
		return;

	if (rss_i > 3)
		psrtype |= 2u << 29;
	else if (rss_i > 1)
		psrtype |= 1u << 29;

	for (p = 0; p < adapter->num_rx_pools; p++)
		IXGBE_WRITE_REG(hw, IXGBE_PSRTYPE(VMDQ_P(p)), psrtype);
}

/**
 * ixgbe_configure_bridge_mode - common settings for configuring bridge mode
 * @adapter - the private structure
 *
 * This function's purpose is to remove code duplication and configure some
 * settings require to switch bridge modes.
 **/
static void ixgbe_configure_bridge_mode(struct ixgbe_adapter *adapter)
{
	struct ixgbe_hw * hw = &adapter->hw;
	unsigned int p;
	u32 vmdctl;

	if (adapter->flags & IXGBE_FLAG_SRIOV_VEPA_BRIDGE_MODE) {
		/* disable Tx loopback, rely on switch hairpin mode */
		IXGBE_WRITE_REG(hw, IXGBE_PFDTXGSWC, 0);

		/* must enable Rx switching replication to allow multicast
		 * packet reception on all VFs, and to enable source address
		 * pruning.
		 */
		vmdctl = IXGBE_READ_REG(hw, IXGBE_VMD_CTL);
		vmdctl |= IXGBE_VT_CTL_REPLEN;
		IXGBE_WRITE_REG(hw, IXGBE_VMD_CTL, vmdctl);

		/* enable Rx source address pruning. Note, this requires
		 * replication to be enabled or else it does nothing.
		 */
		for (p = 0; p < (adapter->num_vfs + adapter->num_rx_pools); p++) {
			if (hw->mac.ops.set_source_address_pruning)
				hw->mac.ops.set_source_address_pruning(hw,
								       true,
								       p);
		}
	} else {
		/* enable Tx loopback for internal VF/PF communication */
		IXGBE_WRITE_REG(hw, IXGBE_PFDTXGSWC, IXGBE_PFDTXGSWC_VT_LBEN);

		/* disable Rx switching replication unless we have SR-IOV
		 * virtual functions
		 */
		vmdctl = IXGBE_READ_REG(hw, IXGBE_VMD_CTL);
		if (!adapter->num_vfs)
			vmdctl &= ~IXGBE_VT_CTL_REPLEN;
		IXGBE_WRITE_REG(hw, IXGBE_VMD_CTL, vmdctl);

		/* disable Rx source address pruning, since we don't expect to
		 * be receiving external loopback of our transmitted frames.
		 */
		for (p = 0; p < (adapter->num_vfs + adapter->num_rx_pools); p++) {
			if (hw->mac.ops.set_source_address_pruning)
				hw->mac.ops.set_source_address_pruning(hw,
								       false,
								       p);
		}
	}

}

static void ixgbe_configure_virtualization(struct ixgbe_adapter *adapter)
{
	struct ixgbe_hw *hw = &adapter->hw;
	u32 reg_offset, vf_shift;
	u32 gcr_ext, vmdctl;
	int i;

	if (!(adapter->flags & IXGBE_FLAG_VMDQ_ENABLED))
		return;

	switch (hw->mac.type) {
	case ixgbe_mac_82598EB:
		vmdctl = IXGBE_READ_REG(hw, IXGBE_VMD_CTL);
		vmdctl |= IXGBE_VMD_CTL_VMDQ_EN;
		IXGBE_WRITE_REG(hw, IXGBE_VMD_CTL, vmdctl);
		break;
	case ixgbe_mac_82599EB:
	case ixgbe_mac_X540:
	case ixgbe_mac_X550:
	case ixgbe_mac_X550EM_x:
	case ixgbe_mac_X550EM_a:
		vmdctl = IXGBE_READ_REG(hw, IXGBE_VT_CTL);
		vmdctl |= IXGBE_VT_CTL_VT_ENABLE;
		vmdctl &= ~IXGBE_VT_CTL_POOL_MASK;
		vmdctl |= VMDQ_P(0) << IXGBE_VT_CTL_POOL_SHIFT;
		if (adapter->num_vfs)
			vmdctl |= IXGBE_VT_CTL_REPLEN;
		IXGBE_WRITE_REG(hw, IXGBE_VT_CTL, vmdctl);

		for (i = 1; i < adapter->num_rx_pools; i++) {
			u32 vmolr;
			int pool = VMDQ_P(i);

			/* accept untagged packets until a vlan tag is
			 * specifically set for the VMDQ queue/pool
			 */
			vmolr = IXGBE_READ_REG(hw, IXGBE_VMOLR(pool));
			vmolr |= IXGBE_VMOLR_AUPE;
			IXGBE_WRITE_REG(hw, IXGBE_VMOLR(pool), vmolr);
		}

		vf_shift = VMDQ_P(0) % 32;
		reg_offset = (VMDQ_P(0) >= 32) ? 1 : 0;

		/* Enable only the PF pools for Tx/Rx */
		IXGBE_WRITE_REG(hw, IXGBE_VFRE(reg_offset), (~0) << vf_shift);
		IXGBE_WRITE_REG(hw, IXGBE_VFRE(reg_offset ^ 1), reg_offset - 1);
		IXGBE_WRITE_REG(hw, IXGBE_VFTE(reg_offset), (~0) << vf_shift);
		IXGBE_WRITE_REG(hw, IXGBE_VFTE(reg_offset ^ 1), reg_offset - 1);

		/* clear VLAN promisc flag so VFTA
		 * will be updated if necessary
		 */
		adapter->flags2 &= ~IXGBE_FLAG2_VLAN_PROMISC;
		break;
	default:
		break;
	}

	if (!(adapter->flags & IXGBE_FLAG_SRIOV_ENABLED))
		return;

	/*
	 * Set up VF register offsets for selected VT Mode,
	 * i.e. 32 or 64 VFs for SR-IOV
	 */
	switch (adapter->ring_feature[RING_F_VMDQ].mask) {
	case IXGBE_82599_VMDQ_8Q_MASK:
		gcr_ext = IXGBE_GCR_EXT_VT_MODE_16;
		break;
	case IXGBE_82599_VMDQ_4Q_MASK:
		gcr_ext = IXGBE_GCR_EXT_VT_MODE_32;
		break;
	default:
		gcr_ext = IXGBE_GCR_EXT_VT_MODE_64;
		break;
	}

	IXGBE_WRITE_REG(hw, IXGBE_GCR_EXT, gcr_ext);

	/* configure default bridge settings */
	ixgbe_configure_bridge_mode(adapter);
#if IS_ENABLED(CONFIG_PCI_IOV)
	for (i = 0; i < adapter->num_vfs; i++) {
		/* configure spoof checking */
		ixgbe_ndo_set_vf_spoofchk(adapter->netdev, i,
					  adapter->vfinfo[i].spoofchk_enabled);

#ifdef HAVE_NDO_SET_VF_RSS_QUERY_EN
		/* Enable/Disable RSS query feature  */
		ixgbe_ndo_set_vf_rss_query_en(adapter->netdev, i,
					adapter->vfinfo[i].rss_query_enabled);
#endif /* HAVE_NDO_SET_VF_RSS_QUERY_EN */
	}
#endif /* CONFIG_PCI_IOV */
}

static void ixgbe_set_rx_buffer_len(struct ixgbe_adapter *adapter)
{
	struct ixgbe_hw *hw = &adapter->hw;
	struct net_device *netdev = adapter->netdev;
	int max_frame = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
	struct ixgbe_ring *rx_ring;
	int i;
	u32 mhadd, hlreg0;
#ifdef CONFIG_IXGBE_DISABLE_PACKET_SPLIT
	int rx_buf_len;
#endif

	switch (hw->mac.type) {
	case ixgbe_mac_X550:
	case ixgbe_mac_X550EM_x:
	case ixgbe_mac_X550EM_a:
		max_frame += IXGBE_TS_HDR_LEN;
	default:
		break;
	}

#if IS_ENABLED(CONFIG_FCOE)
	/* adjust max frame to be able to do baby jumbo for FCoE */
	if ((adapter->flags & IXGBE_FLAG_FCOE_ENABLED) &&
	    (max_frame < IXGBE_FCOE_JUMBO_FRAME_SIZE))
		max_frame = IXGBE_FCOE_JUMBO_FRAME_SIZE;
#endif /* CONFIG_FCOE */

	/* 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);

	mhadd = IXGBE_READ_REG(hw, IXGBE_MHADD);
	if (max_frame != (mhadd >> IXGBE_MHADD_MFS_SHIFT)) {
		mhadd &= ~IXGBE_MHADD_MFS_MASK;
		mhadd |= max_frame << IXGBE_MHADD_MFS_SHIFT;

		IXGBE_WRITE_REG(hw, IXGBE_MHADD, mhadd);
	}

#ifdef CONFIG_IXGBE_DISABLE_PACKET_SPLIT
		/* MHADD will allow an extra 4 bytes past for vlan tagged frames */
		max_frame += VLAN_HLEN;

	if (!(adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED) &&
	    (max_frame <= MAXIMUM_ETHERNET_VLAN_SIZE)) {
		rx_buf_len = MAXIMUM_ETHERNET_VLAN_SIZE;
	/*
	 * Make best use of allocation by using all but 1K of a
	 * power of 2 allocation that will be used for skb->head.
	 */
	} else if (max_frame <= IXGBE_RXBUFFER_3K) {
		rx_buf_len = IXGBE_RXBUFFER_3K;
	} else if (max_frame <= IXGBE_RXBUFFER_7K) {
		rx_buf_len = IXGBE_RXBUFFER_7K;
	} else if (max_frame <= IXGBE_RXBUFFER_15K) {
		rx_buf_len = IXGBE_RXBUFFER_15K;
	} else {
		rx_buf_len = IXGBE_MAX_RXBUFFER;
	}

#endif /* CONFIG_IXGBE_DISABLE_PACKET_SPLIT */
	hlreg0 = IXGBE_READ_REG(hw, IXGBE_HLREG0);
	/* set jumbo enable since MHADD.MFS is keeping size locked at
	 * max_frame
	 */
	hlreg0 |= IXGBE_HLREG0_JUMBOEN;
	IXGBE_WRITE_REG(hw, IXGBE_HLREG0, hlreg0);

	/*
	 * 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++) {
		rx_ring = adapter->rx_ring[i];

		clear_ring_rsc_enabled(rx_ring);
		if (adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED)
			set_ring_rsc_enabled(rx_ring);

#ifndef CONFIG_IXGBE_DISABLE_PACKET_SPLIT
		clear_bit(__IXGBE_RX_3K_BUFFER, &rx_ring->state);
		clear_bit(__IXGBE_RX_BUILD_SKB_ENABLED, &rx_ring->state);
#if IS_ENABLED(CONFIG_FCOE)

		if (test_bit(__IXGBE_RX_FCOE, &rx_ring->state))
			set_bit(__IXGBE_RX_3K_BUFFER, &rx_ring->state);
#endif
#ifdef HAVE_SWIOTLB_SKIP_CPU_SYNC

		if (adapter->flags2 & IXGBE_FLAG2_RX_LEGACY)
			continue;

		set_bit(__IXGBE_RX_BUILD_SKB_ENABLED, &rx_ring->state);

#if (PAGE_SIZE < 8192)
		if (adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED)
			set_bit(__IXGBE_RX_3K_BUFFER, &rx_ring->state);

		if (IXGBE_2K_TOO_SMALL_WITH_PADDING ||
		    (max_frame > (ETH_FRAME_LEN + ETH_FCS_LEN)))
			set_bit(__IXGBE_RX_3K_BUFFER, &rx_ring->state);
#endif
#else /* !HAVE_SWIOTLB_SKIP_CPU_SYNC */

		adapter->flags2 |= IXGBE_FLAG2_RX_LEGACY;
#endif /* !HAVE_SWIOTLB_SKIP_CPU_SYNC */
#else /* CONFIG_IXGBE_DISABLE_PACKET_SPLIT */

		rx_ring->rx_buf_len = rx_buf_len;
#if IS_ENABLED(CONFIG_FCOE)

		if (test_bit(__IXGBE_RX_FCOE, &rx_ring->state) &&
		    (rx_buf_len < IXGBE_FCOE_JUMBO_FRAME_SIZE))
			rx_ring->rx_buf_len = IXGBE_FCOE_JUMBO_FRAME_SIZE;
#endif /* CONFIG_FCOE */
#endif /* CONFIG_IXGBE_DISABLE_PACKET_SPLIT */
	}
}

static void ixgbe_setup_rdrxctl(struct ixgbe_adapter *adapter)
{
	struct ixgbe_hw *hw = &adapter->hw;
	u32 rdrxctl = IXGBE_READ_REG(hw, IXGBE_RDRXCTL);

	switch (hw->mac.type) {
	case ixgbe_mac_X550:
	case ixgbe_mac_X550EM_x:
	case ixgbe_mac_X550EM_a:
		if (adapter->num_vfs)
			rdrxctl |= IXGBE_RDRXCTL_PSP;
		/* fall through */
	case ixgbe_mac_82599EB:
	case ixgbe_mac_X540:
		/* Disable RSC for ACK packets */
		IXGBE_WRITE_REG(hw, IXGBE_RSCDBU,
		   (IXGBE_RSCDBU_RSCACKDIS | IXGBE_READ_REG(hw, IXGBE_RSCDBU)));
		rdrxctl &= ~IXGBE_RDRXCTL_RSCFRSTSIZE;
		/* hardware requires some bits to be set by default */
		rdrxctl |= (IXGBE_RDRXCTL_RSCACKC | IXGBE_RDRXCTL_FCOE_WRFIX);
		rdrxctl |= IXGBE_RDRXCTL_CRCSTRIP;
		break;
	case ixgbe_mac_82598EB:
		/*
		 * For VMDq support of different descriptor types or
		 * buffer sizes through the use of multiple SRRCTL
		 * registers, RDRXCTL.MVMEN must be set to 1
		 *
		 * also, the manual doesn't mention it clearly but DCA hints
		 * will only use queue 0's tags unless this bit is set.  Side
		 * effects of setting this bit are only that SRRCTL must be
		 * fully programmed [0..15]
		 */
		rdrxctl |= IXGBE_RDRXCTL_MVMEN;
		break;
	default:
		/* We should do nothing since we don't know this hardware */
		return;
	}

	IXGBE_WRITE_REG(hw, IXGBE_RDRXCTL, rdrxctl);
}

/**
 * ixgbe_configure_rx - Configure 8259x Receive Unit after Reset
 * @adapter: board private structure
 *
 * Configure the Rx unit of the MAC after a reset.
 **/
static void ixgbe_configure_rx(struct ixgbe_adapter *adapter)
{
	struct ixgbe_hw *hw = &adapter->hw;
	int i;
	u32 rxctrl, rfctl;

	/* disable receives while setting up the descriptors */
	ixgbe_disable_rx(hw);

	ixgbe_setup_psrtype(adapter);
	ixgbe_setup_rdrxctl(adapter);

	/* RSC Setup */
	rfctl = IXGBE_READ_REG(hw, IXGBE_RFCTL);
	rfctl &= ~IXGBE_RFCTL_RSC_DIS;
	if (!(adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED))
		rfctl |= IXGBE_RFCTL_RSC_DIS;

	/* disable NFS filtering */
	rfctl |= (IXGBE_RFCTL_NFSW_DIS | IXGBE_RFCTL_NFSR_DIS);
	IXGBE_WRITE_REG(hw, IXGBE_RFCTL, rfctl);

	/* Program registers for the distribution of queues */
	ixgbe_setup_mrqc(adapter);

	/* set_rx_buffer_len must be called before ring initialization */
	ixgbe_set_rx_buffer_len(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++)
		ixgbe_configure_rx_ring(adapter, adapter->rx_ring[i]);

	rxctrl = IXGBE_READ_REG(hw, IXGBE_RXCTRL);
	/* disable drop enable for 82598 parts */
	if (hw->mac.type == ixgbe_mac_82598EB)
		rxctrl |= IXGBE_RXCTRL_DMBYPS;

	/* enable all receives */
	rxctrl |= IXGBE_RXCTRL_RXEN;
	hw->mac.ops.enable_rx_dma(hw, rxctrl);
}

#if defined(NETIF_F_HW_VLAN_TX) || defined(NETIF_F_HW_VLAN_CTAG_TX)
#ifdef HAVE_INT_NDO_VLAN_RX_ADD_VID
#ifdef NETIF_F_HW_VLAN_CTAG_TX
static int ixgbe_vlan_rx_add_vid(struct net_device *netdev,
				 __always_unused __be16 proto, u16 vid)
#else /* !NETIF_F_HW_VLAN_CTAG_TX */
static int ixgbe_vlan_rx_add_vid(struct net_device *netdev, u16 vid)
#endif /* NETIF_F_HW_VLAN_CTAG_TX */
#else /* !HAVE_INT_NDO_VLAN_RX_ADD_VID */
static void ixgbe_vlan_rx_add_vid(struct net_device *netdev, u16 vid)
#endif /* HAVE_INT_NDO_VLAN_RX_ADD_VID */
{
	struct ixgbe_adapter *adapter = netdev_priv(netdev);
	struct ixgbe_hw *hw = &adapter->hw;
	int pool_ndx = VMDQ_P(0);

	/* add VID to filter table */
	if (hw->mac.ops.set_vfta) {
#ifndef HAVE_VLAN_RX_REGISTER
		if (vid < VLAN_N_VID)
			set_bit(vid, adapter->active_vlans);
#endif

		if (!vid || !(adapter->flags2 & IXGBE_FLAG2_VLAN_PROMISC))
			hw->mac.ops.set_vfta(hw, vid, pool_ndx, true, !!vid);

		if (adapter->flags & IXGBE_FLAG_VMDQ_ENABLED &&
		    adapter->hw.mac.type != ixgbe_mac_82598EB) {
			int i;

			/* enable vlan id for all pools */
			for (i = 1; i < adapter->num_rx_pools; i++)
				hw->mac.ops.set_vfta(hw, vid, VMDQ_P(i), true,
#ifdef HAVE_VLAN_RX_REGISTER
						     false);
#else
						     true);
#endif
		}
	}
#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.
	 * Some vlans, such as VLAN 0 for DCB will not have a v_netdev so
	 * we will not have a netdev that needs updating.
	 */
	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 /* HAVE_NETDEV_VLAN_FEATURES */
#ifdef HAVE_INT_NDO_VLAN_RX_ADD_VID
	return 0;
#endif
}

#if defined(HAVE_VLAN_RX_REGISTER) && defined(CONFIG_PCI_IOV)
int ixgbe_find_vlvf_entry(struct ixgbe_hw *hw, u32 vlan)
#else
static int ixgbe_find_vlvf_entry(struct ixgbe_hw *hw, u32 vlan)
#endif
{
	u32 vlvf;
	int idx;

	/* short cut the special case */
	if (vlan == 0)
		return 0;

	/* Search for the vlan id in the VLVF entries */
	for (idx = IXGBE_VLVF_ENTRIES; --idx;) {
		vlvf = IXGBE_READ_REG(hw, IXGBE_VLVF(idx));
		if ((vlvf & VLAN_VID_MASK) == vlan)
			break;
	}

	return idx;
}

void ixgbe_update_pf_promisc_vlvf(struct ixgbe_adapter *adapter, u32 vid)
{
	struct ixgbe_hw *hw = &adapter->hw;
	u32 bits, word;
	int idx;

	idx = ixgbe_find_vlvf_entry(hw, vid);
	if (!idx)
		return;

	/* See if any other pools are set for this VLAN filter
	 * entry other than the PF.
	 */
	word = idx * 2 + (VMDQ_P(0) / 32);
	bits = ~(1 << (VMDQ_P(0)) % 32);
	bits &= IXGBE_READ_REG(hw, IXGBE_VLVFB(word));

	/* Disable the filter so this falls into the default pool. */
	if (!bits && !IXGBE_READ_REG(hw, IXGBE_VLVFB(word ^ 1))) {
		if (!(adapter->flags2 & IXGBE_FLAG2_VLAN_PROMISC))
			IXGBE_WRITE_REG(hw, IXGBE_VLVFB(word), 0);
		IXGBE_WRITE_REG(hw, IXGBE_VLVF(idx), 0);
	}
}

#ifdef HAVE_INT_NDO_VLAN_RX_ADD_VID
#ifdef NETIF_F_HW_VLAN_CTAG_RX
static int ixgbe_vlan_rx_kill_vid(struct net_device *netdev,
				  __always_unused __be16 proto, u16 vid)
#else /* !NETIF_F_HW_VLAN_CTAG_RX */
static int ixgbe_vlan_rx_kill_vid(struct net_device *netdev, u16 vid)
#endif /* NETIF_F_HW_VLAN_CTAG_RX */
#else
static void ixgbe_vlan_rx_kill_vid(struct net_device *netdev, u16 vid)
#endif
{
	struct ixgbe_adapter *adapter = netdev_priv(netdev);
	struct ixgbe_hw *hw = &adapter->hw;
	int pool_ndx = VMDQ_P(0);

	/* User is not allowed to remove vlan ID 0 */
	if (!vid)
#ifdef HAVE_INT_NDO_VLAN_RX_ADD_VID
		return 0;
#else
		return;
#endif

#ifdef HAVE_VLAN_RX_REGISTER
	if (!test_bit(__IXGBE_DOWN, &adapter->state))
		ixgbe_irq_disable(adapter);

	vlan_group_set_device(adapter->vlgrp, vid, NULL);

	if (!test_bit(__IXGBE_DOWN, &adapter->state))
		ixgbe_irq_enable(adapter, true, true);

#endif /* HAVE_VLAN_RX_REGISTER */
	/* remove VID from filter table */
	if (hw->mac.ops.set_vfta) {
		if (vid && !(adapter->flags2 & IXGBE_FLAG2_VLAN_PROMISC))
			hw->mac.ops.set_vfta(hw, vid, pool_ndx, false, true);

		if (adapter->flags & IXGBE_FLAG_VMDQ_ENABLED &&
		    adapter->hw.mac.type != ixgbe_mac_82598EB) {
			int i;

			/* remove vlan id from all pools */
			for (i = 1; i < adapter->num_rx_pools; i++)
				hw->mac.ops.set_vfta(hw, vid, VMDQ_P(i), false,
						     true);
		}
	}
#ifndef HAVE_VLAN_RX_REGISTER

	clear_bit(vid, adapter->active_vlans);
#endif
#ifdef HAVE_INT_NDO_VLAN_RX_ADD_VID
	return 0;
#endif
}

#ifdef HAVE_8021P_SUPPORT
/**
 * ixgbe_vlan_strip_disable - helper to disable vlan tag stripping
 * @adapter: driver data
 */
void ixgbe_vlan_strip_disable(struct ixgbe_adapter *adapter)
{
	struct ixgbe_hw *hw = &adapter->hw;
	u32 vlnctrl;
	int i, j;

	/* leave vlan tag stripping enabled for DCB */
	if (adapter->flags & IXGBE_FLAG_DCB_ENABLED)
		return;

	switch (hw->mac.type) {
	case ixgbe_mac_82598EB:
		vlnctrl = IXGBE_READ_REG(hw, IXGBE_VLNCTRL);
		vlnctrl &= ~IXGBE_VLNCTRL_VME;
		IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl);
		break;
	case ixgbe_mac_82599EB:
	case ixgbe_mac_X540:
	case ixgbe_mac_X550:
	case ixgbe_mac_X550EM_x:
	case ixgbe_mac_X550EM_a:
		for (i = 0; i < adapter->num_rx_queues; i++) {
			struct ixgbe_ring *ring = adapter->rx_ring[i];

			j = ring->reg_idx;
			vlnctrl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(j));
			vlnctrl &= ~IXGBE_RXDCTL_VME;
			IXGBE_WRITE_REG(hw, IXGBE_RXDCTL(j), vlnctrl);
		}
		break;
	default:
		break;
	}
}

#endif /* HAVE_8021P_SUPPORT */
/**
 * ixgbe_vlan_strip_enable - helper to enable vlan tag stripping
 * @adapter: driver data
 */
void ixgbe_vlan_strip_enable(struct ixgbe_adapter *adapter)
{
	struct ixgbe_hw *hw = &adapter->hw;
	u32 vlnctrl;
	int i, j;

	switch (hw->mac.type) {
	case ixgbe_mac_82598EB:
		vlnctrl = IXGBE_READ_REG(hw, IXGBE_VLNCTRL);
		vlnctrl |= IXGBE_VLNCTRL_VME;
		IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl);
		break;
	case ixgbe_mac_82599EB:
	case ixgbe_mac_X540:
	case ixgbe_mac_X550:
	case ixgbe_mac_X550EM_x:
	case ixgbe_mac_X550EM_a:
		for (i = 0; i < adapter->num_rx_queues; i++) {
			struct ixgbe_ring *ring = adapter->rx_ring[i];

			j = ring->reg_idx;
			vlnctrl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(j));
			vlnctrl |= IXGBE_RXDCTL_VME;
			IXGBE_WRITE_REG(hw, IXGBE_RXDCTL(j), vlnctrl);
		}
		break;
	default:
		break;
	}
}

#ifndef HAVE_VLAN_RX_REGISTER
static void ixgbe_vlan_promisc_enable(struct ixgbe_adapter *adapter)
{
	struct ixgbe_hw *hw = &adapter->hw;
	u32 vlnctrl, i;

	vlnctrl = IXGBE_READ_REG(hw, IXGBE_VLNCTRL);

	if (adapter->flags & IXGBE_FLAG_VMDQ_ENABLED) {
	/* we need to keep the VLAN filter on in SRIOV */
		vlnctrl |= IXGBE_VLNCTRL_VFE;
		IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl);
	} else {
		vlnctrl &= ~IXGBE_VLNCTRL_VFE;
		IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl);
		return;
	}

	/* Nothing to do for 82598 */
	if (hw->mac.type == ixgbe_mac_82598EB)
		return;

	/* We are already in VLAN promisc, nothing to do */
	if (adapter->flags2 & IXGBE_FLAG2_VLAN_PROMISC)
		return;

	/* Set flag so we don't redo unnecessary work */
	adapter->flags2 |= IXGBE_FLAG2_VLAN_PROMISC;

	/* Add PF to all active pools */
	for (i = IXGBE_VLVF_ENTRIES; --i;) {
		u32 reg_offset = IXGBE_VLVFB(i * 2 + VMDQ_P(0) / 32);
		u32 vlvfb = IXGBE_READ_REG(hw, reg_offset);

		vlvfb |= 1 << (VMDQ_P(0) % 32);
		IXGBE_WRITE_REG(hw, reg_offset, vlvfb);
	}

	/* Set all bits in the VLAN filter table array */
	for (i = hw->mac.vft_size; i--;)
		IXGBE_WRITE_REG(hw, IXGBE_VFTA(i), ~0U);
}

#define VFTA_BLOCK_SIZE 8
static void ixgbe_scrub_vfta(struct ixgbe_adapter *adapter, u32 vfta_offset)
{
	struct ixgbe_hw *hw = &adapter->hw;
	u32 vfta[VFTA_BLOCK_SIZE] = { 0 };
	u32 vid_start = vfta_offset * 32;
	u32 vid_end = vid_start + (VFTA_BLOCK_SIZE * 32);
	u32 i, vid, word, bits;

	for (i = IXGBE_VLVF_ENTRIES; --i;) {
		u32 vlvf = IXGBE_READ_REG(hw, IXGBE_VLVF(i));

		/* pull VLAN ID from VLVF */
		vid = vlvf & VLAN_VID_MASK;

		/* only concern outselves with a certain range */
		if (vid < vid_start || vid >= vid_end)
			continue;

		if (vlvf) {
			/* record VLAN ID in VFTA */
			vfta[(vid - vid_start) / 32] |= 1 << (vid % 32);

			/* if PF is part of this then continue */
			if (test_bit(vid, adapter->active_vlans))
				continue;
		}

		/* remove PF from the pool */
		word = i * 2 + VMDQ_P(0) / 32;
		bits = ~(1 << (VMDQ_P(0) % 32));
		bits &= IXGBE_READ_REG(hw, IXGBE_VLVFB(word));
		IXGBE_WRITE_REG(hw, IXGBE_VLVFB(word), bits);
	}

	/* extract values from active_vlans and write back to VFTA */
	for (i = VFTA_BLOCK_SIZE; i--;) {
		vid = (vfta_offset + i) * 32;
		word = vid / BITS_PER_LONG;
		bits = vid % BITS_PER_LONG;

		vfta[i] |= adapter->active_vlans[word] >> bits;

		IXGBE_WRITE_REG(hw, IXGBE_VFTA(vfta_offset + i), vfta[i]);
	}
}

static void ixgbe_vlan_promisc_disable(struct ixgbe_adapter *adapter)
{
	struct ixgbe_hw *hw = &adapter->hw;
	u32 vlnctrl, i;

	/* configure vlan filtering */
	vlnctrl = IXGBE_READ_REG(hw, IXGBE_VLNCTRL);
	vlnctrl |= IXGBE_VLNCTRL_VFE;
	IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl);

	if (!(adapter->flags & IXGBE_FLAG_VMDQ_ENABLED) ||
	    hw->mac.type == ixgbe_mac_82598EB)
		return;

	/* We are not in VLAN promisc, nothing to do */
	if (!(adapter->flags2 & IXGBE_FLAG2_VLAN_PROMISC))
		return;

	/* Set flag so we don't redo unnecessary work */
	adapter->flags2 &= ~IXGBE_FLAG2_VLAN_PROMISC;

	for (i = 0; i < hw->mac.vft_size; i += VFTA_BLOCK_SIZE)
		ixgbe_scrub_vfta(adapter, i);
}
#endif /* HAVE_VLAN_RX_REGISTER */

#ifdef HAVE_VLAN_RX_REGISTER
static void ixgbe_vlan_mode(struct net_device *netdev, struct vlan_group *grp)
#else
void ixgbe_vlan_mode(struct net_device *netdev, u32 features)
#endif
{
#if defined(HAVE_VLAN_RX_REGISTER) || defined(HAVE_8021P_SUPPORT)
	struct ixgbe_adapter *adapter = netdev_priv(netdev);
#endif
#ifdef HAVE_8021P_SUPPORT
	bool enable;
#endif

#ifdef HAVE_VLAN_RX_REGISTER
	if (!test_bit(__IXGBE_DOWN, &adapter->state))
		ixgbe_irq_disable(adapter);

	adapter->vlgrp = grp;

	if (!test_bit(__IXGBE_DOWN, &adapter->state))
		ixgbe_irq_enable(adapter, true, true);
#endif
#ifdef HAVE_8021P_SUPPORT
#ifdef HAVE_VLAN_RX_REGISTER
	enable = (grp || (adapter->flags & IXGBE_FLAG_DCB_ENABLED));
#else
#ifdef NETIF_F_HW_VLAN_CTAG_RX
	enable = !!(features & NETIF_F_HW_VLAN_CTAG_RX);
#else
	enable = !!(features & NETIF_F_HW_VLAN_RX);
#endif /* NETIF_F_HW_VLAN_CTAG_RX */
#endif /* HAVE_VLAN_RX_REGISTER */
	if (enable)
		/* enable VLAN tag insert/strip */
		ixgbe_vlan_strip_enable(adapter);
	else
		/* disable VLAN tag insert/strip */
		ixgbe_vlan_strip_disable(adapter);

#endif /* HAVE_8021P_SUPPORT */
}

static void ixgbe_restore_vlan(struct ixgbe_adapter *adapter)
{
	u16 vid = 1;
#ifdef HAVE_VLAN_RX_REGISTER

	ixgbe_vlan_mode(adapter->netdev, adapter->vlgrp);

	/*
	 * add vlan ID 0 and enable vlan tag stripping so we
	 * always accept priority-tagged traffic
	 */
#ifdef NETIF_F_HW_VLAN_CTAG_RX
	ixgbe_vlan_rx_add_vid(adapter->netdev, htons(ETH_P_8021Q), 0);
#else
	ixgbe_vlan_rx_add_vid(adapter->netdev, 0);
#endif
#ifndef HAVE_8021P_SUPPORT
	ixgbe_vlan_strip_enable(adapter);
#endif

	if (adapter->vlgrp) {
		for (; vid < VLAN_N_VID; vid++) {
			if (!vlan_group_get_device(adapter->vlgrp, vid))
				continue;
#ifdef NETIF_F_HW_VLAN_CTAG_RX
			ixgbe_vlan_rx_add_vid(adapter->netdev,
					      htons(ETH_P_8021Q), vid);
#else
			ixgbe_vlan_rx_add_vid(adapter->netdev, vid);
#endif
		}
	}
#else /* !HAVE_VLAN_RX_REGISTER */

#ifdef NETIF_F_HW_VLAN_CTAG_RX
	ixgbe_vlan_rx_add_vid(adapter->netdev, htons(ETH_P_8021Q), 0);
#else
	ixgbe_vlan_rx_add_vid(adapter->netdev, 0);
#endif

	for_each_set_bit_from(vid, adapter->active_vlans, VLAN_N_VID)
#ifdef NETIF_F_HW_VLAN_CTAG_RX
		ixgbe_vlan_rx_add_vid(adapter->netdev, htons(ETH_P_8021Q), vid);
#else
		ixgbe_vlan_rx_add_vid(adapter->netdev, vid);
#endif
#endif /* HAVE_VLAN_RX_REGISTER */
}

#endif
static u8 *ixgbe_addr_list_itr(struct ixgbe_hw __maybe_unused *hw, u8 **mc_addr_ptr, u32 *vmdq)
{
#ifdef NETDEV_HW_ADDR_T_MULTICAST
	struct netdev_hw_addr *mc_ptr;
#else
	struct dev_mc_list *mc_ptr;
#endif
#ifdef CONFIG_PCI_IOV
	struct ixgbe_adapter *adapter = hw->back;
#endif /* CONFIG_PCI_IOV */
	u8 *addr = *mc_addr_ptr;

	/* VMDQ_P implicitely uses the adapter struct when CONFIG_PCI_IOV is
	 * defined, so we have to wrap the pointer above correctly to prevent
	 * a warning.
	 */
	*vmdq = VMDQ_P(0);

#ifdef NETDEV_HW_ADDR_T_MULTICAST
	mc_ptr = container_of(addr, struct netdev_hw_addr, addr[0]);
	if (mc_ptr->list.next) {
		struct netdev_hw_addr *ha;

		ha = list_entry(mc_ptr->list.next, struct netdev_hw_addr, list);
		*mc_addr_ptr = ha->addr;
	}
#else
	mc_ptr = container_of(addr, struct dev_mc_list, dmi_addr[0]);
	if (mc_ptr->next)
		*mc_addr_ptr = mc_ptr->next->dmi_addr;
#endif
	else
		*mc_addr_ptr = NULL;

	return addr;
}

/**
 * ixgbe_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 ixgbe_write_mc_addr_list(struct net_device *netdev)
{
	struct ixgbe_adapter *adapter = netdev_priv(netdev);
	struct ixgbe_hw *hw = &adapter->hw;
#ifdef NETDEV_HW_ADDR_T_MULTICAST
	struct netdev_hw_addr *ha;
#endif
	u8  *addr_list = NULL;
	int addr_count = 0;

	if (!hw->mac.ops.update_mc_addr_list)
		return -ENOMEM;

	if (!netif_running(netdev))
		return 0;


	if (netdev_mc_empty(netdev)) {
		hw->mac.ops.update_mc_addr_list(hw, NULL, 0,
						ixgbe_addr_list_itr, true);
	} else {
#ifdef NETDEV_HW_ADDR_T_MULTICAST
		ha = list_first_entry(&netdev->mc.list,
				      struct netdev_hw_addr, list);
		addr_list = ha->addr;
#else
		addr_list = netdev->mc_list->dmi_addr;
#endif
		addr_count = netdev_mc_count(netdev);

		hw->mac.ops.update_mc_addr_list(hw, addr_list, addr_count,
						ixgbe_addr_list_itr, true);
	}

#ifdef CONFIG_PCI_IOV
	ixgbe_restore_vf_multicasts(adapter);
#endif
	return addr_count;
}

#ifdef CONFIG_PCI_IOV
void ixgbe_full_sync_mac_table(struct ixgbe_adapter *adapter)
{
	struct ixgbe_mac_addr *mac_table = &adapter->mac_table[0];
	struct ixgbe_hw *hw = &adapter->hw;
	int i;

	for (i = 0; i < hw->mac.num_rar_entries; i++, mac_table++) {
		mac_table->state &= ~IXGBE_MAC_STATE_MODIFIED;

		if (mac_table->state & IXGBE_MAC_STATE_IN_USE)
			hw->mac.ops.set_rar(hw, i,
					    mac_table->addr,
					    mac_table->pool,
					    IXGBE_RAH_AV);
		else
			hw->mac.ops.clear_rar(hw, i);
	}
}
#endif

static void ixgbe_sync_mac_table(struct ixgbe_adapter *adapter)
{
	struct ixgbe_mac_addr *mac_table = &adapter->mac_table[0];
	struct ixgbe_hw *hw = &adapter->hw;
	int i;

	for (i = 0; i < hw->mac.num_rar_entries; i++, mac_table++) {
		if (!(mac_table->state & IXGBE_MAC_STATE_MODIFIED))
			continue;

		mac_table->state &= ~IXGBE_MAC_STATE_MODIFIED;

		if (mac_table->state & IXGBE_MAC_STATE_IN_USE)
			hw->mac.ops.set_rar(hw, i,
					    mac_table->addr,
					    mac_table->pool,
					    IXGBE_RAH_AV);
		else
			hw->mac.ops.clear_rar(hw, i);
	}
}

int ixgbe_available_rars(struct ixgbe_adapter *adapter, u16 pool)
{
	struct ixgbe_mac_addr *mac_table = &adapter->mac_table[0];
	struct ixgbe_hw *hw = &adapter->hw;
	int i, count = 0;

	for (i = 0; i < hw->mac.num_rar_entries; i++, mac_table++) {
		/* do not count default RAR as available */
		if (mac_table->state & IXGBE_MAC_STATE_DEFAULT)
			continue;

		/* only count unused and addresses that belong to us */
		if (mac_table->state & IXGBE_MAC_STATE_IN_USE) {
			if (mac_table->pool != pool)
				continue;
		}

		count++;
	}

	return count;
}

/* this function destroys the first RAR entry */
static void ixgbe_mac_set_default_filter(struct ixgbe_adapter *adapter)
{
	struct ixgbe_mac_addr *mac_table = &adapter->mac_table[0];
	struct ixgbe_hw *hw = &adapter->hw;

	ether_addr_copy(mac_table->addr, hw->mac.addr);
	mac_table->pool = VMDQ_P(0);

	mac_table->state = IXGBE_MAC_STATE_DEFAULT | IXGBE_MAC_STATE_IN_USE;

	hw->mac.ops.set_rar(hw, 0, mac_table->addr, mac_table->pool,
			    IXGBE_RAH_AV);
}

int ixgbe_add_mac_filter(struct ixgbe_adapter *adapter,
			 const u8 *addr, u16 pool)
{
	struct ixgbe_mac_addr *mac_table = &adapter->mac_table[0];
	struct ixgbe_hw *hw = &adapter->hw;
	int i;

	if (is_zero_ether_addr(addr))
		return -EINVAL;

	for (i = 0; i < hw->mac.num_rar_entries; i++, mac_table++) {
		if (mac_table->state & IXGBE_MAC_STATE_IN_USE) {
			continue;
		}

		ether_addr_copy(mac_table->addr, addr);
		mac_table->pool = pool;

		mac_table->state |= IXGBE_MAC_STATE_MODIFIED |
				    IXGBE_MAC_STATE_IN_USE;

		ixgbe_sync_mac_table(adapter);

		return i;
	}

	return -ENOMEM;
}

static void ixgbe_flush_sw_mac_table(struct ixgbe_adapter *adapter)
{
	struct ixgbe_mac_addr *mac_table = &adapter->mac_table[0];
	struct ixgbe_hw *hw = &adapter->hw;
	int i;

	for (i = 0; i < hw->mac.num_rar_entries; i++, mac_table++) {
		mac_table->state |= IXGBE_MAC_STATE_MODIFIED;
		mac_table->state &= ~IXGBE_MAC_STATE_IN_USE;
	}

	ixgbe_sync_mac_table(adapter);
}

int ixgbe_del_mac_filter(struct ixgbe_adapter *adapter,
			 const u8 *addr, u16 pool)
{
	struct ixgbe_mac_addr *mac_table = &adapter->mac_table[0];
	struct ixgbe_hw *hw = &adapter->hw;
	int i;

	if (is_zero_ether_addr(addr))
		return -EINVAL;

	/* search table for addr, if found clear IN USE flag and sync */
	for (i = 0; i < hw->mac.num_rar_entries; i++, mac_table++) {
		/* we can only delete an entry if it is in use */
		if (!(mac_table->state & IXGBE_MAC_STATE_IN_USE))
			continue;
		/* we only care about entries that belong to the given pool */
		if (mac_table->pool != pool)
			continue;
		/* we only care about a specific MAC address */
		if (!ether_addr_equal(addr, mac_table->addr))
			continue;

		mac_table->state |= IXGBE_MAC_STATE_MODIFIED;
		mac_table->state &= ~IXGBE_MAC_STATE_IN_USE;

		ixgbe_sync_mac_table(adapter);

		return 0;
	}

	return -ENOMEM;
}

#ifdef HAVE_SET_RX_MODE
/**
 * ixgbe_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
 **/
int ixgbe_write_uc_addr_list(struct net_device *netdev, int vfn)
{
	struct ixgbe_adapter *adapter = netdev_priv(netdev);
	int count = 0;

	/* return ENOMEM indicating insufficient memory for addresses */
	if (netdev_uc_count(netdev) > ixgbe_available_rars(adapter, vfn))
		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
			ixgbe_del_mac_filter(adapter, ha->addr, vfn);
			ixgbe_add_mac_filter(adapter, ha->addr, vfn);
#else
			ixgbe_del_mac_filter(adapter, ha->da_addr, vfn);
			ixgbe_add_mac_filter(adapter, ha->da_addr, vfn);
#endif
			count++;
		}
	}
	return count;
}

static int ixgbe_uc_sync(struct net_device *netdev, const unsigned char *addr)
{
	struct ixgbe_adapter *adapter = netdev_priv(netdev);
	int ret;

	ret = ixgbe_add_mac_filter(adapter, addr, VMDQ_P(0));

	return min_t(int, ret, 0);
}

static int ixgbe_uc_unsync(struct net_device *netdev, const unsigned char *addr)
{
	struct ixgbe_adapter *adapter = netdev_priv(netdev);

	ixgbe_del_mac_filter(adapter, addr, VMDQ_P(0));

	return 0;
}

#endif
/**
 * ixgbe_set_rx_mode - Unicast, Multicast and Promiscuous mode set
 * @netdev: network interface device structure
 *
 * The set_rx_method entry point is called whenever the unicast/multicast
 * address list or the network interface flags are updated.  This routine is
 * responsible for configuring the hardware for proper unicast, multicast and
 * promiscuous mode.
 **/
void ixgbe_set_rx_mode(struct net_device *netdev)
{
	struct ixgbe_adapter *adapter = netdev_priv(netdev);
	struct ixgbe_hw *hw = &adapter->hw;
	u32 fctrl, vmolr = IXGBE_VMOLR_BAM | IXGBE_VMOLR_AUPE;
#if defined(HAVE_VLAN_RX_REGISTER) || defined(ESX55)
	u32 vlnctrl;
#endif
#if defined(NETIF_F_HW_VLAN_CTAG_FILTER) || defined(NETIF_F_HW_VLAN_FILTER)
	netdev_features_t features = netdev->features;
#endif
	int count;

	/* Check for Promiscuous and All Multicast modes */
	fctrl = IXGBE_READ_REG(hw, IXGBE_FCTRL);
#if defined(HAVE_VLAN_RX_REGISTER) || defined(ESX55)
	vlnctrl = IXGBE_READ_REG(hw, IXGBE_VLNCTRL);
#endif

	/* set all bits that we expect to always be set */
	fctrl |= IXGBE_FCTRL_BAM;
	fctrl |= IXGBE_FCTRL_DPF; /* discard pause frames when FC enabled */
	fctrl |= IXGBE_FCTRL_PMCF;

	/* clear the bits we are changing the status of */
	fctrl &= ~(IXGBE_FCTRL_UPE | IXGBE_FCTRL_MPE);
#if defined(HAVE_VLAN_RX_REGISTER) || defined(ESX55)
	vlnctrl  &= ~(IXGBE_VLNCTRL_VFE | IXGBE_VLNCTRL_CFIEN);
#endif
	if (netdev->flags & IFF_PROMISC) {
		hw->addr_ctrl.user_set_promisc = true;
		fctrl |= (IXGBE_FCTRL_UPE | IXGBE_FCTRL_MPE);
		vmolr |= IXGBE_VMOLR_MPE;
#ifdef HAVE_VLAN_RX_REGISTER
		/* Only disable hardware filter vlans in promiscuous mode
		 * if SR-IOV and VMDQ are disabled - otherwise ensure
		 * that hardware VLAN filters remain enabled.
		 */
		if ((adapter->flags & (IXGBE_FLAG_VMDQ_ENABLED |
				       IXGBE_FLAG_SRIOV_ENABLED)))
			vlnctrl |= (IXGBE_VLNCTRL_VFE | IXGBE_VLNCTRL_CFIEN);
#endif
#ifdef NETIF_F_HW_VLAN_CTAG_FILTER
		features &= ~NETIF_F_HW_VLAN_CTAG_FILTER;
#endif
#ifdef NETIF_F_HW_VLAN_FILTER
		features &= ~NETIF_F_HW_VLAN_FILTER;
#endif
	} else {
		if (netdev->flags & IFF_ALLMULTI) {
			fctrl |= IXGBE_FCTRL_MPE;
			vmolr |= IXGBE_VMOLR_MPE;
		}
		hw->addr_ctrl.user_set_promisc = false;
#if defined(HAVE_VLAN_RX_REGISTER) || defined(ESX55)
		/* enable hardware vlan filtering */
		vlnctrl |= IXGBE_VLNCTRL_VFE;
#endif
	}

#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
	 */
	if (__dev_uc_sync(netdev, ixgbe_uc_sync, ixgbe_uc_unsync)) {
		fctrl |= IXGBE_FCTRL_UPE;
		vmolr |= IXGBE_VMOLR_ROPE;
	}

#endif
	/*
	 * 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 = ixgbe_write_mc_addr_list(netdev);
	if (count < 0) {
		fctrl |= IXGBE_FCTRL_MPE;
		vmolr |= IXGBE_VMOLR_MPE;
	} else if (count) {
		vmolr |= IXGBE_VMOLR_ROMPE;
	}

	if (hw->mac.type != ixgbe_mac_82598EB) {
		vmolr |= IXGBE_READ_REG(hw, IXGBE_VMOLR(VMDQ_P(0))) &
			 ~(IXGBE_VMOLR_MPE | IXGBE_VMOLR_ROMPE |
			   IXGBE_VMOLR_ROPE);
		IXGBE_WRITE_REG(hw, IXGBE_VMOLR(VMDQ_P(0)), vmolr);
	}

	IXGBE_WRITE_REG(hw, IXGBE_FCTRL, fctrl);

#ifdef HAVE_8021P_SUPPORT
#ifdef NETIF_F_HW_VLAN_CTAG_RX
	if (features & NETIF_F_HW_VLAN_CTAG_RX)
#else
	if (features & NETIF_F_HW_VLAN_RX)
#endif
		ixgbe_vlan_strip_enable(adapter);
	else
		ixgbe_vlan_strip_disable(adapter);
#endif /* HAVE_8021P_SUPPORT */

#if defined(NETIF_F_HW_VLAN_CTAG_FILTER)
	if (features & NETIF_F_HW_VLAN_CTAG_FILTER)
		ixgbe_vlan_promisc_disable(adapter);
	else
		ixgbe_vlan_promisc_enable(adapter);
#elif defined(NETIF_F_HW_VLAN_FILTER) && !defined(HAVE_VLAN_RX_REGISTER)
	if (features & NETIF_F_HW_VLAN_FILTER)
		ixgbe_vlan_promisc_disable(adapter);
	else
		ixgbe_vlan_promisc_enable(adapter);
#elif defined(HAVE_VLAN_RX_REGISTER) || defined(ESX55)
	IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl);
#endif /* NETIF_F_HW_VLAN_CTAG_FILTER */
}

static void ixgbe_napi_enable_all(struct ixgbe_adapter *adapter)
{
	struct ixgbe_q_vector *q_vector;
	int q_idx;

	for (q_idx = 0; q_idx < adapter->num_q_vectors; q_idx++) {
		q_vector = adapter->q_vector[q_idx];
#ifdef HAVE_NDO_BUSY_POLL
		ixgbe_qv_init_lock(adapter->q_vector[q_idx]);
#endif
		napi_enable(&q_vector->napi);
	}
}

static void ixgbe_napi_disable_all(struct ixgbe_adapter *adapter)
{
	struct ixgbe_q_vector *q_vector;
	int q_idx;

	for (q_idx = 0; q_idx < adapter->num_q_vectors; q_idx++) {
		q_vector = adapter->q_vector[q_idx];
		napi_disable(&q_vector->napi);
#ifdef HAVE_NDO_BUSY_POLL
		while(!ixgbe_qv_disable(adapter->q_vector[q_idx])) {
			pr_info("QV %d locked\n", q_idx);
			usleep_range(1000, 20000);
		}
#endif
	}
}

#ifdef HAVE_DCBNL_IEEE
s32 ixgbe_dcb_hw_ets(struct ixgbe_hw *hw, struct ieee_ets *ets, int max_frame)
{
	__u16 refill[IEEE_8021QAZ_MAX_TCS], max[IEEE_8021QAZ_MAX_TCS];
	__u8 prio_type[IEEE_8021QAZ_MAX_TCS];
	int i;

	/* naively give each TC a bwg to map onto CEE hardware */
	__u8 bwg_id[IEEE_8021QAZ_MAX_TCS] = {0, 1, 2, 3, 4, 5, 6, 7};

	/* Map TSA onto CEE prio type */
	for (i = 0; i < IEEE_8021QAZ_MAX_TCS; i++) {
		switch (ets->tc_tsa[i]) {
		case IEEE_8021QAZ_TSA_STRICT:
			prio_type[i] = 2;
			break;
		case IEEE_8021QAZ_TSA_ETS:
			prio_type[i] = 0;
			break;
		default:
			/* Hardware only supports priority strict or
			 * ETS transmission selection algorithms if
			 * we receive some other value from dcbnl
			 * throw an error
			 */
			return -EINVAL;
		}
	}

	ixgbe_dcb_calculate_tc_credits(ets->tc_tx_bw, refill, max, max_frame);
	return ixgbe_dcb_hw_config(hw, refill, max,
				   bwg_id, prio_type, ets->prio_tc);
}
#endif /* HAVE_DCBNL_IEEE */

#if defined(HAVE_UDP_ENC_RX_OFFLOAD) || defined(HAVE_VXLAN_RX_OFFLOAD)
void ixgbe_clear_udp_tunnel_port(struct ixgbe_adapter *adapter, u32 mask)
{
	struct ixgbe_hw *hw = &adapter->hw;
	u32 vxlanctrl;

	if (!(adapter->flags & (IXGBE_FLAG_VXLAN_OFFLOAD_CAPABLE |
				IXGBE_FLAG_GENEVE_OFFLOAD_CAPABLE)))
		return;

	vxlanctrl = IXGBE_READ_REG(hw, IXGBE_VXLANCTRL) & ~mask;
	IXGBE_WRITE_REG(hw, IXGBE_VXLANCTRL, vxlanctrl);

	if (mask & IXGBE_VXLANCTRL_VXLAN_UDPPORT_MASK)
		adapter->vxlan_port = 0;
#ifdef HAVE_UDP_ENC_RX_OFFLOAD
	if (mask & IXGBE_VXLANCTRL_GENEVE_UDPPORT_MASK)
		adapter->geneve_port = 0;
#endif /* HAVE_UDP_ENC_RX_OFFLOAD */
}
#endif /* HAVE_UDP_ENC_RX_OFFLOAD || HAVE_VXLAN_RX_OFFLOAD */

#ifdef NETIF_F_GSO_PARTIAL
/* NETIF_F_GSO_IPXIP4/6 may not be defined in all distributions */
#ifndef NETIF_F_GSO_IPXIP4
#define NETIF_F_GSO_IPXIP4 0
#endif
#ifndef NETIF_F_GSO_IPXIP6
#define NETIF_F_GSO_IPXIP6 0
#endif
#define IXGBE_GSO_PARTIAL_FEATURES (NETIF_F_GSO_GRE | \
				    NETIF_F_GSO_GRE_CSUM | \
				    NETIF_F_GSO_IPXIP4 | \
				    NETIF_F_GSO_IPXIP6 | \
				    NETIF_F_GSO_UDP_TUNNEL | \
				    NETIF_F_GSO_UDP_TUNNEL_CSUM)
#endif /* NETIF_F_GSO_PARTIAL */

static inline unsigned long ixgbe_tso_features(void)
{
	unsigned long features = 0;

#ifdef NETIF_F_TSO
	features |= NETIF_F_TSO;
#endif /* NETIF_F_TSO */
#ifdef NETIF_F_TSO6
	features |= NETIF_F_TSO6;
#endif /* NETIF_F_TSO6 */
#ifdef NETIF_F_GSO_PARTIAL
	features |= NETIF_F_GSO_PARTIAL | IXGBE_GSO_PARTIAL_FEATURES;
#endif

	return features;
}

/*
 * ixgbe_configure_dcb - Configure DCB hardware support
 * @adapter: ixgbe adapter struct
 *
 * Called when the driver opens or needs to reconfigure DCB related bits.
 */
static void ixgbe_configure_dcb(struct ixgbe_adapter *adapter)
{
	struct ixgbe_hw *hw = &adapter->hw;
	struct net_device *netdev = adapter->netdev;

	int max_frame = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;

	/* The following workaround for 82598EB was originaly hidden inside a
	 * kcompat definition of netif_set_gso_max_size. This workaround is
	 * necessary as the 82598EB hardware does not support TSO and DCB
	 * unless the stack TSO maximum segment size can be reduced. Older
	 * kernels do not support the requisite interface, and thus need TSO
	 * disabled if we want to support DCB.
	 */
	if (!(adapter->flags & IXGBE_FLAG_DCB_ENABLED)) {
		if (hw->mac.type == ixgbe_mac_82598EB) {
#ifdef NETDEV_CAN_SET_GSO_MAX_SIZE
			netif_set_gso_max_size(netdev, 65536);
#else
			/* We previously disabled TSO, so we should enable it
			 * now. */
			netdev->features |= ixgbe_tso_features();
#ifdef NETIF_F_GSO_PARTIAL
			netdev->gso_partial_features =
						     IXGBE_GSO_PARTIAL_FEATURES;
#endif
#endif /* NETDEV_CAN_SET_GSO_MAX_SIZE */
		}
		return;
	}

	if (hw->mac.type == ixgbe_mac_82598EB) {
#ifdef NETDEV_CAN_SET_GSO_MAX_SIZE
		netif_set_gso_max_size(netdev, 32768);
#else
		/* Simply disable TSO since we cannot change the maximum
		 * segment size. */
		netdev->features &= ~ixgbe_tso_features();
#ifdef NETIF_F_GSO_PARTIAL
		netdev->gso_partial_features = 0;
#endif
#endif /* NETDEV_CAN_SET_GSO_MAX_SIZE */
	}

#if IS_ENABLED(CONFIG_FCOE)
	if (netdev->features & NETIF_F_FCOE_MTU)
		max_frame = max_t(int, max_frame,
				  IXGBE_FCOE_JUMBO_FRAME_SIZE);
#endif /* CONFIG_FCOE */

#ifdef HAVE_DCBNL_IEEE
	if (adapter->dcbx_cap & DCB_CAP_DCBX_VER_IEEE) {
		if (adapter->ixgbe_ieee_ets)
			ixgbe_dcb_hw_ets(&adapter->hw,
					 adapter->ixgbe_ieee_ets,
					 max_frame);

		if (adapter->ixgbe_ieee_pfc && adapter->ixgbe_ieee_ets) {
			struct ieee_pfc *pfc = adapter->ixgbe_ieee_pfc;
			u8 *tc = adapter->ixgbe_ieee_ets->prio_tc;

			ixgbe_dcb_config_pfc(&adapter->hw, pfc->pfc_en, tc);
		}
	} else
#endif /* HAVE_DCBNL_IEEE */
	{
		ixgbe_dcb_calculate_tc_credits_cee(hw,
						   &adapter->dcb_cfg,
						   max_frame,
						   IXGBE_DCB_TX_CONFIG);
		ixgbe_dcb_calculate_tc_credits_cee(hw,
						   &adapter->dcb_cfg,
						   max_frame,
						   IXGBE_DCB_RX_CONFIG);
		ixgbe_dcb_hw_config_cee(hw, &adapter->dcb_cfg);
	}

	/* Enable RSS Hash per TC */
	if (hw->mac.type != ixgbe_mac_82598EB) {
		u32 msb = 0;
		u16 rss_i = adapter->ring_feature[RING_F_RSS].indices - 1;

		while (rss_i) {
			msb++;
			rss_i >>= 1;
		}

		/* write msb to all 8 TCs in one write */
		IXGBE_WRITE_REG(hw, IXGBE_RQTC, msb * 0x11111111);
	}
}

#ifndef IXGBE_NO_LLI
static void ixgbe_configure_lli_82599(struct ixgbe_adapter *adapter)
{
	u16 port;

	if (adapter->lli_etype) {
		IXGBE_WRITE_REG(&adapter->hw, IXGBE_L34T_IMIR(0),
				(IXGBE_IMIR_LLI_EN_82599 |
				 IXGBE_IMIR_SIZE_BP_82599 |
				 IXGBE_IMIR_CTRL_BP_82599));
		IXGBE_WRITE_REG(&adapter->hw, IXGBE_ETQS(0), IXGBE_ETQS_LLI);
		IXGBE_WRITE_REG(&adapter->hw, IXGBE_ETQF(0),
				(adapter->lli_etype | IXGBE_ETQF_FILTER_EN));
	}

	if (adapter->lli_port) {
		port = swab16(adapter->lli_port);
		IXGBE_WRITE_REG(&adapter->hw, IXGBE_L34T_IMIR(0),
				(IXGBE_IMIR_LLI_EN_82599 |
				 IXGBE_IMIR_SIZE_BP_82599 |
				 IXGBE_IMIR_CTRL_BP_82599));
		IXGBE_WRITE_REG(&adapter->hw, IXGBE_FTQF(0),
				(IXGBE_FTQF_POOL_MASK_EN |
				 (IXGBE_FTQF_PRIORITY_MASK <<
				  IXGBE_FTQF_PRIORITY_SHIFT) |
				 (IXGBE_FTQF_DEST_PORT_MASK <<
				  IXGBE_FTQF_5TUPLE_MASK_SHIFT)));
		IXGBE_WRITE_REG(&adapter->hw, IXGBE_SDPQF(0), (port << 16));
	}

	if (adapter->flags & IXGBE_FLAG_LLI_PUSH) {
		switch (adapter->hw.mac.type) {
		case ixgbe_mac_82599EB:
			IXGBE_WRITE_REG(&adapter->hw, IXGBE_L34T_IMIR(0),
					(IXGBE_IMIR_LLI_EN_82599 |
					 IXGBE_IMIR_SIZE_BP_82599 |
					 IXGBE_IMIR_CTRL_PSH_82599 |
					 IXGBE_IMIR_CTRL_SYN_82599 |
					 IXGBE_IMIR_CTRL_URG_82599 |
					 IXGBE_IMIR_CTRL_ACK_82599 |
					 IXGBE_IMIR_CTRL_RST_82599 |
					 IXGBE_IMIR_CTRL_FIN_82599));
			IXGBE_WRITE_REG(&adapter->hw, IXGBE_LLITHRESH,
					0xfc000000);
			break;
		case ixgbe_mac_X540:
			IXGBE_WRITE_REG(&adapter->hw, IXGBE_L34T_IMIR(0),
					(IXGBE_IMIR_LLI_EN_82599 |
					 IXGBE_IMIR_SIZE_BP_82599 |
					 IXGBE_IMIR_CTRL_PSH_82599));
			break;
		default:
			break;
		}
		IXGBE_WRITE_REG(&adapter->hw, IXGBE_FTQF(0),
				(IXGBE_FTQF_POOL_MASK_EN |
				 (IXGBE_FTQF_PRIORITY_MASK <<
				  IXGBE_FTQF_PRIORITY_SHIFT) |
				 (IXGBE_FTQF_5TUPLE_MASK_MASK <<
				  IXGBE_FTQF_5TUPLE_MASK_SHIFT)));

		IXGBE_WRITE_REG(&adapter->hw, IXGBE_SYNQF, 0x80000100);
	}

	if (adapter->lli_size) {
		IXGBE_WRITE_REG(&adapter->hw, IXGBE_L34T_IMIR(0),
				(IXGBE_IMIR_LLI_EN_82599 |
				 IXGBE_IMIR_CTRL_BP_82599));
		IXGBE_WRITE_REG(&adapter->hw, IXGBE_LLITHRESH,
				adapter->lli_size);
		IXGBE_WRITE_REG(&adapter->hw, IXGBE_FTQF(0),
				(IXGBE_FTQF_POOL_MASK_EN |
				 (IXGBE_FTQF_PRIORITY_MASK <<
				  IXGBE_FTQF_PRIORITY_SHIFT) |
				 (IXGBE_FTQF_5TUPLE_MASK_MASK <<
				  IXGBE_FTQF_5TUPLE_MASK_SHIFT)));
	}

	if (adapter->lli_vlan_pri) {
		IXGBE_WRITE_REG(&adapter->hw, IXGBE_IMIRVP,
				(IXGBE_IMIRVP_PRIORITY_EN |
				 adapter->lli_vlan_pri));
	}
}

static void ixgbe_configure_lli(struct ixgbe_adapter *adapter)
{
	u16 port;

	/* lli should only be enabled with MSI-X and MSI */
	if (!(adapter->flags & IXGBE_FLAG_MSI_ENABLED) &&
	    !(adapter->flags & IXGBE_FLAG_MSIX_ENABLED))
		return;
	/* LLI not supported on X550 and X550EM_x*/
	if ((adapter->hw.mac.type == ixgbe_mac_X550) ||
	    (adapter->hw.mac.type == ixgbe_mac_X550EM_x))
		return;
	/* LLI not supported on X550EM_a */
	if (adapter->hw.mac.type == ixgbe_mac_X550EM_a)
		return;
	if (adapter->hw.mac.type != ixgbe_mac_82598EB) {
		ixgbe_configure_lli_82599(adapter);
		return;
	}

	if (adapter->lli_port) {
		/* use filter 0 for port */
		port = swab16(adapter->lli_port);
		IXGBE_WRITE_REG(&adapter->hw, IXGBE_IMIR(0),
				(port | IXGBE_IMIR_PORT_IM_EN));
		IXGBE_WRITE_REG(&adapter->hw, IXGBE_IMIREXT(0),
				(IXGBE_IMIREXT_SIZE_BP |
				 IXGBE_IMIREXT_CTRL_BP));
	}

	if (adapter->flags & IXGBE_FLAG_LLI_PUSH) {
		/* use filter 1 for push flag */
		IXGBE_WRITE_REG(&adapter->hw, IXGBE_IMIR(1),
				(IXGBE_IMIR_PORT_BP | IXGBE_IMIR_PORT_IM_EN));
		IXGBE_WRITE_REG(&adapter->hw, IXGBE_IMIREXT(1),
				(IXGBE_IMIREXT_SIZE_BP |
				 IXGBE_IMIREXT_CTRL_PSH));
	}

	if (adapter->lli_size) {
		/* use filter 2 for size */
		IXGBE_WRITE_REG(&adapter->hw, IXGBE_IMIR(2),
				(IXGBE_IMIR_PORT_BP | IXGBE_IMIR_PORT_IM_EN));
		IXGBE_WRITE_REG(&adapter->hw, IXGBE_IMIREXT(2),
				(adapter->lli_size | IXGBE_IMIREXT_CTRL_BP));
	}
}

#endif /* IXGBE_NO_LLI */
/* Additional bittime to account for IXGBE framing */
#define IXGBE_ETH_FRAMING 20

/*
 * ixgbe_hpbthresh - calculate high water mark for flow control
 *
 * @adapter: board private structure to calculate for
 * @pb - packet buffer to calculate
 */
static int ixgbe_hpbthresh(struct ixgbe_adapter *adapter, int pb)
{
	struct ixgbe_hw *hw = &adapter->hw;
	struct net_device *dev = adapter->netdev;
	int link, tc, kb, marker;
	u32 dv_id, rx_pba;

	/* Calculate max LAN frame size */
	tc = link = dev->mtu + ETH_HLEN + ETH_FCS_LEN + IXGBE_ETH_FRAMING;

#if IS_ENABLED(CONFIG_FCOE)
	/* FCoE traffic class uses FCOE jumbo frames */
	if ((dev->features & NETIF_F_FCOE_MTU) &&
	    (tc < IXGBE_FCOE_JUMBO_FRAME_SIZE) &&
	    (pb == netdev_get_prio_tc_map(dev, adapter->fcoe.up)))
		tc = IXGBE_FCOE_JUMBO_FRAME_SIZE;
#endif /* CONFIG_FCOE */

	/* Calculate delay value for device */
	switch (hw->mac.type) {
	case ixgbe_mac_X540:
	case ixgbe_mac_X550:
	case ixgbe_mac_X550EM_x:
	case ixgbe_mac_X550EM_a:
		dv_id = IXGBE_DV_X540(link, tc);
		break;
	default:
		dv_id = IXGBE_DV(link, tc);
		break;
	}

	/* Loopback switch introduces additional latency */
	if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)
		dv_id += IXGBE_B2BT(tc);

	/* Delay value is calculated in bit times convert to KB */
	kb = IXGBE_BT2KB(dv_id);
	rx_pba = IXGBE_READ_REG(hw, IXGBE_RXPBSIZE(pb)) >> 10;

	marker = rx_pba - kb;

	/* It is possible that the packet buffer is not large enough
	 * to provide required headroom. In this case throw an error
	 * to user and a do the best we can.
	 */
	if (marker < 0) {
		e_warn(drv, "Packet Buffer(%i) can not provide enough"
			    "headroom to suppport flow control."
			    "Decrease MTU or number of traffic classes\n", pb);
		marker = tc + 1;
	}

	return marker;
}

/*
 * ixgbe_lpbthresh - calculate low water mark for for flow control
 *
 * @adapter: board private structure to calculate for
 * @pb - packet buffer to calculate
 */
static int ixgbe_lpbthresh(struct ixgbe_adapter *adapter, int __maybe_unused pb)
{
	struct ixgbe_hw *hw = &adapter->hw;
	struct net_device *dev = adapter->netdev;
	int tc;
	u32 dv_id;

	/* Calculate max LAN frame size */
	tc = dev->mtu + ETH_HLEN + ETH_FCS_LEN;

#if IS_ENABLED(CONFIG_FCOE)
	/* FCoE traffic class uses FCOE jumbo frames */
	if ((dev->features & NETIF_F_FCOE_MTU) &&
	    (tc < IXGBE_FCOE_JUMBO_FRAME_SIZE) &&
	    (pb == netdev_get_prio_tc_map(dev, adapter->fcoe.up)))
		tc = IXGBE_FCOE_JUMBO_FRAME_SIZE;
#endif /* CONFIG_FCOE */

	/* Calculate delay value for device */
	switch (hw->mac.type) {
	case ixgbe_mac_X540:
	case ixgbe_mac_X550:
	case ixgbe_mac_X550EM_x:
	case ixgbe_mac_X550EM_a:
		dv_id = IXGBE_LOW_DV_X540(tc);
		break;
	default:
		dv_id = IXGBE_LOW_DV(tc);
		break;
	}

	/* Delay value is calculated in bit times convert to KB */
	return IXGBE_BT2KB(dv_id);
}

/*
 * ixgbe_pbthresh_setup - calculate and setup high low water marks
 */
static void ixgbe_pbthresh_setup(struct ixgbe_adapter *adapter)
{
	struct ixgbe_hw *hw = &adapter->hw;
	int num_tc = netdev_get_num_tc(adapter->netdev);
	int i;

	if (!num_tc)
		num_tc = 1;


	for (i = 0; i < num_tc; i++) {
		hw->fc.high_water[i] = ixgbe_hpbthresh(adapter, i);
		hw->fc.low_water[i] = ixgbe_lpbthresh(adapter, i);

		/* Low water marks must not be larger than high water marks */
		if (hw->fc.low_water[i] > hw->fc.high_water[i])
			hw->fc.low_water[i] = 0;
	}

	for (; i < IXGBE_DCB_MAX_TRAFFIC_CLASS; i++)
		hw->fc.high_water[i] = 0;
}

static void ixgbe_configure_pb(struct ixgbe_adapter *adapter)
{
	struct ixgbe_hw *hw = &adapter->hw;
	int hdrm;
	u8 tc = netdev_get_num_tc(adapter->netdev);

	if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE ||
	    adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE)
		hdrm = 32 << adapter->fdir_pballoc;
	else
		hdrm = 0;

	hw->mac.ops.setup_rxpba(hw, tc, hdrm, PBA_STRATEGY_EQUAL);
	ixgbe_pbthresh_setup(adapter);
}

static void ixgbe_fdir_filter_restore(struct ixgbe_adapter *adapter)
{
	struct ixgbe_hw *hw = &adapter->hw;
	struct hlist_node *node2;
	struct ixgbe_fdir_filter *filter;

	spin_lock(&adapter->fdir_perfect_lock);

	if (!hlist_empty(&adapter->fdir_filter_list))
		ixgbe_fdir_set_input_mask_82599(hw, &adapter->fdir_mask, 
				adapter->cloud_mode);

	hlist_for_each_entry_safe(filter, node2,
				  &adapter->fdir_filter_list, fdir_node) {
		ixgbe_fdir_write_perfect_filter_82599(hw,
				&filter->filter,
				filter->sw_idx,
				(filter->action == IXGBE_FDIR_DROP_QUEUE) ?
				IXGBE_FDIR_DROP_QUEUE :
				adapter->rx_ring[filter->action]->reg_idx,
				adapter->cloud_mode);
	}

	spin_unlock(&adapter->fdir_perfect_lock);
}

/**
 * ixgbe_clean_rx_ring - Free Rx Buffers per Queue
 * @rx_ring: ring to free buffers from
 **/
static void ixgbe_clean_rx_ring(struct ixgbe_ring *rx_ring)
{
	u16 i = rx_ring->next_to_clean;
	struct ixgbe_rx_buffer *rx_buffer = &rx_ring->rx_buffer_info[i];

	/* Free all the Rx ring sk_buffs */
#ifdef CONFIG_IXGBE_DISABLE_PACKET_SPLIT
	while (i != rx_ring->next_to_use) {
#else
	while (i != rx_ring->next_to_alloc) {
#endif
		if (rx_buffer->skb) {
			struct sk_buff *skb = rx_buffer->skb;
#ifndef CONFIG_IXGBE_DISABLE_PACKET_SPLIT
			if (IXGBE_CB(skb)->page_released)
				dma_unmap_page_attrs(rx_ring->dev,
						     IXGBE_CB(skb)->dma,
						     ixgbe_rx_pg_size(rx_ring),
						     DMA_FROM_DEVICE,
						     IXGBE_RX_DMA_ATTR);
#else
			/* We need to clean up RSC frag lists */
			skb = ixgbe_merge_active_tail(skb);
			if (ixgbe_close_active_frag_list(skb))
				dma_unmap_single(rx_ring->dev,
						 IXGBE_CB(skb)->dma,
						 rx_ring->rx_buf_len,
						 DMA_FROM_DEVICE);
			IXGBE_CB(skb)->dma = 0;
#endif /* CONFIG_IXGBE_DISABLE_PACKET_SPLIT */
			dev_kfree_skb(skb);
			rx_buffer->skb = NULL;
		}

#ifndef CONFIG_IXGBE_DISABLE_PACKET_SPLIT
		/* Invalidate cache lines that may have been written to by
		 * device so that we avoid corrupting memory.
		 */
		dma_sync_single_range_for_cpu(rx_ring->dev,
					      rx_buffer->dma,
					      rx_buffer->page_offset,
					      ixgbe_rx_bufsz(rx_ring),
					      DMA_FROM_DEVICE);

		/* free resources associated with mapping */
		dma_unmap_page_attrs(rx_ring->dev, rx_buffer->dma,
				     ixgbe_rx_pg_size(rx_ring),
				     DMA_FROM_DEVICE,
				     IXGBE_RX_DMA_ATTR);

		__page_frag_cache_drain(rx_buffer->page,
					rx_buffer->pagecnt_bias);
#else /* CONFIG_IXGBE_DISABLE_PACKET_SPLIT */
		if (rx_buffer->dma) {
			dma_unmap_single(rx_ring->dev,
					 rx_buffer->dma,
					 rx_ring->rx_buf_len,
					 DMA_FROM_DEVICE);
			rx_buffer->dma = 0;
		}
#endif /* CONFIG_IXGBE_DISABLE_PACKET_SPLIT */
		i++;
		rx_buffer++;
		if (i == rx_ring->count) {
			i = 0;
			rx_buffer = rx_ring->rx_buffer_info;
		}
	}
#ifndef CONFIG_IXGBE_DISABLE_PACKET_SPLIT

	rx_ring->next_to_alloc = 0;
	rx_ring->next_to_clean = 0;
	rx_ring->next_to_use = 0;
#endif
}

static void ixgbe_configure(struct ixgbe_adapter *adapter)
{
	struct ixgbe_hw *hw = &adapter->hw;

	ixgbe_configure_pb(adapter);
	ixgbe_configure_dcb(adapter);

	/*
	 * We must restore virtualization before VLANs or else
	 * the VLVF registers will not be populated
	 */
	ixgbe_configure_virtualization(adapter);

	ixgbe_set_rx_mode(adapter->netdev);
#if defined(NETIF_F_HW_VLAN_TX) || defined(NETIF_F_HW_VLAN_CTAG_TX)
	ixgbe_restore_vlan(adapter);
#endif

	if (adapter->hw.mac.type == ixgbe_mac_82599EB ||
	    adapter->hw.mac.type == ixgbe_mac_X540)
		hw->mac.ops.disable_sec_rx_path(hw);

	if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) {
		ixgbe_init_fdir_signature_82599(&adapter->hw,
						adapter->fdir_pballoc);
	} else if (adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE) {
		ixgbe_init_fdir_perfect_82599(&adapter->hw,
					      adapter->fdir_pballoc, adapter->cloud_mode);
		ixgbe_fdir_filter_restore(adapter);
	}

	if (adapter->hw.mac.type == ixgbe_mac_82599EB ||
	    adapter->hw.mac.type == ixgbe_mac_X540)
		hw->mac.ops.enable_sec_rx_path(hw);

	/* Enable EEE only when supported and enabled */
	if (hw->mac.ops.setup_eee &&
	    (adapter->flags2 & IXGBE_FLAG2_EEE_CAPABLE)) {
		bool eee_enable = !!(adapter->flags2 & IXGBE_FLAG2_EEE_ENABLED);

		hw->mac.ops.setup_eee(hw, eee_enable);
	}

#if IS_ENABLED(CONFIG_DCA)
	/* configure DCA */
	if (adapter->flags & IXGBE_FLAG_DCA_CAPABLE)
		ixgbe_setup_dca(adapter);
#endif

#if IS_ENABLED(CONFIG_FCOE)
	/* configure FCoE L2 filters, redirection table, and Rx control */
	ixgbe_configure_fcoe(adapter);
#endif /* CONFIG_FCOE */

	ixgbe_configure_tx(adapter);
	ixgbe_configure_rx(adapter);
}

static bool ixgbe_is_sfp(struct ixgbe_hw *hw)
{
	switch (hw->mac.type) {
	case ixgbe_mac_82598EB:
		if (hw->phy.type == ixgbe_phy_nl)
			return true;
		return false;
	case ixgbe_mac_82599EB:
		switch (hw->mac.ops.get_media_type(hw)) {
		case ixgbe_media_type_fiber:
		case ixgbe_media_type_fiber_qsfp:
			return true;
		default:
			return false;
		}
	case ixgbe_mac_X550EM_x:
	case ixgbe_mac_X550EM_a:
		if (hw->mac.ops.get_media_type(hw) == ixgbe_media_type_fiber)
			return true;
		return false;
	default:
		return false;
	}
}

/**
 * ixgbe_sfp_link_config - set up SFP+ link
 * @adapter: pointer to private adapter struct
 **/
static void ixgbe_sfp_link_config(struct ixgbe_adapter *adapter)
{
	/*
	 * We are assuming the worst case scenerio here, and that
	 * is that an SFP was inserted/removed after the reset
	 * but before SFP detection was enabled.  As such the best
	 * solution is to just start searching as soon as we start
	 */
	if (adapter->hw.mac.type == ixgbe_mac_82598EB)
		adapter->flags2 |= IXGBE_FLAG2_SEARCH_FOR_SFP;

	adapter->flags2 |= IXGBE_FLAG2_SFP_NEEDS_RESET;
	adapter->sfp_poll_time = 0;
}

/**
 * ixgbe_non_sfp_link_config - set up non-SFP+ link
 * @hw: pointer to private hardware struct
 *
 * Returns 0 on success, negative on failure
 **/
static int ixgbe_non_sfp_link_config(struct ixgbe_hw *hw)
{
	u32 speed;
	bool autoneg, link_up = false;
	u32 ret = IXGBE_ERR_LINK_SETUP;

	if (hw->mac.ops.check_link)
		ret = hw->mac.ops.check_link(hw, &speed, &link_up, false);

	if (ret)
		goto link_cfg_out;

	speed = hw->phy.autoneg_advertised;
	if ((!speed) && (hw->mac.ops.get_link_capabilities))
		ret = hw->mac.ops.get_link_capabilities(hw, &speed,
							&autoneg);
	if (ret)
		goto link_cfg_out;

	if (hw->mac.ops.setup_link)
		ret = hw->mac.ops.setup_link(hw, speed, link_up);
link_cfg_out:
	return ret;
}

/**
 * ixgbe_clear_vf_stats_counters - Clear out VF stats after reset
 * @adapter: board private structure
 *
 * On a reset we need to clear out the VF stats or accounting gets
 * messed up because they're not clear on read.
 **/
static void ixgbe_clear_vf_stats_counters(struct ixgbe_adapter *adapter)
{
	struct ixgbe_hw *hw = &adapter->hw;
	int i;

	for (i = 0; i < adapter->num_vfs; i++) {
		adapter->vfinfo[i].last_vfstats.gprc =
			IXGBE_READ_REG(hw, IXGBE_PVFGPRC(i));
		adapter->vfinfo[i].saved_rst_vfstats.gprc +=
			adapter->vfinfo[i].vfstats.gprc;
		adapter->vfinfo[i].vfstats.gprc = 0;
		adapter->vfinfo[i].last_vfstats.gptc =
			IXGBE_READ_REG(hw, IXGBE_PVFGPTC(i));
		adapter->vfinfo[i].saved_rst_vfstats.gptc +=
			adapter->vfinfo[i].vfstats.gptc;
		adapter->vfinfo[i].vfstats.gptc = 0;
		adapter->vfinfo[i].last_vfstats.gorc =
			IXGBE_READ_REG(hw, IXGBE_PVFGORC_LSB(i));
		adapter->vfinfo[i].saved_rst_vfstats.gorc +=
			adapter->vfinfo[i].vfstats.gorc;
		adapter->vfinfo[i].vfstats.gorc = 0;
		adapter->vfinfo[i].last_vfstats.gotc =
			IXGBE_READ_REG(hw, IXGBE_PVFGOTC_LSB(i));
		adapter->vfinfo[i].saved_rst_vfstats.gotc +=
			adapter->vfinfo[i].vfstats.gotc;
		adapter->vfinfo[i].vfstats.gotc = 0;
		adapter->vfinfo[i].last_vfstats.mprc =
			IXGBE_READ_REG(hw, IXGBE_PVFMPRC(i));
		adapter->vfinfo[i].saved_rst_vfstats.mprc +=
			adapter->vfinfo[i].vfstats.mprc;
		adapter->vfinfo[i].vfstats.mprc = 0;
	}
}

static void ixgbe_setup_gpie(struct ixgbe_adapter *adapter)
{
	struct ixgbe_hw *hw = &adapter->hw;
	u32 gpie = 0;

	if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
		gpie = IXGBE_GPIE_MSIX_MODE | IXGBE_GPIE_PBA_SUPPORT |
		       IXGBE_GPIE_OCD;
		gpie |= IXGBE_GPIE_EIAME;
		/*
		 * use EIAM to auto-mask when MSI-X interrupt is asserted
		 * this saves a register write for every interrupt
		 */
		switch (hw->mac.type) {
		case ixgbe_mac_82598EB:
			IXGBE_WRITE_REG(hw, IXGBE_EIAM, IXGBE_EICS_RTX_QUEUE);
			break;
		case ixgbe_mac_82599EB:
		case ixgbe_mac_X540:
		case ixgbe_mac_X550:
		case ixgbe_mac_X550EM_x:
		case ixgbe_mac_X550EM_a:
		default:
			IXGBE_WRITE_REG(hw, IXGBE_EIAM_EX(0), 0xFFFFFFFF);
			IXGBE_WRITE_REG(hw, IXGBE_EIAM_EX(1), 0xFFFFFFFF);
			break;
		}
	} else {
		/* legacy interrupts, use EIAM to auto-mask when reading EICR,
		 * specifically only auto mask tx and rx interrupts */
		IXGBE_WRITE_REG(hw, IXGBE_EIAM, IXGBE_EICS_RTX_QUEUE);
	}

	if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) {
		gpie &= ~IXGBE_GPIE_VTMODE_MASK;

		switch (adapter->ring_feature[RING_F_VMDQ].mask) {
		case IXGBE_82599_VMDQ_8Q_MASK:
			gpie |= IXGBE_GPIE_VTMODE_16;
			break;
		case IXGBE_82599_VMDQ_4Q_MASK:
			gpie |= IXGBE_GPIE_VTMODE_32;
			break;
		default:
			gpie |= IXGBE_GPIE_VTMODE_64;
			break;
		}
	}

	/* Enable Thermal over heat sensor interrupt */
	if (adapter->flags2 & IXGBE_FLAG2_TEMP_SENSOR_CAPABLE)
		switch (adapter->hw.mac.type) {
		case ixgbe_mac_82599EB:
			gpie |= IXGBE_SDP0_GPIEN;
			break;
		default:
			break;
		}

	/* Enable fan failure interrupt */
	if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE)
		gpie |= IXGBE_SDP1_GPIEN;

	switch (hw->mac.type) {
	case ixgbe_mac_82599EB:
		gpie |= IXGBE_SDP1_GPIEN | IXGBE_SDP2_GPIEN;
		break;
	case ixgbe_mac_X550EM_x:
	case ixgbe_mac_X550EM_a:
		gpie |= IXGBE_SDP0_GPIEN_X540;
		break;
	default:
		break;
	}

	IXGBE_WRITE_REG(hw, IXGBE_GPIE, gpie);
}

static void ixgbe_up_complete(struct ixgbe_adapter *adapter)
{
	struct ixgbe_hw *hw = &adapter->hw;
	int err;
	u32 ctrl_ext;

	ixgbe_get_hw_control(adapter);
	ixgbe_setup_gpie(adapter);

	if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED)
		ixgbe_configure_msix(adapter);
	else
		ixgbe_configure_msi_and_legacy(adapter);

	/* enable the optics for 82599 SFP+ fiber */
	if (hw->mac.ops.enable_tx_laser)
		hw->mac.ops.enable_tx_laser(hw);
	ixgbe_set_phy_power(hw, true);

	smp_mb__before_atomic();
	clear_bit(__IXGBE_DOWN, &adapter->state);
	ixgbe_napi_enable_all(adapter);
#ifndef IXGBE_NO_LLI
	ixgbe_configure_lli(adapter);
#endif

	if (ixgbe_is_sfp(hw)) {
		ixgbe_sfp_link_config(adapter);
	} else if (!hw->phy.reset_disable) {
		err = ixgbe_non_sfp_link_config(hw);
		if (err)
			e_err(probe, "link_config FAILED %d\n", err);
	}

	/* clear any pending interrupts, may auto mask */
	IXGBE_READ_REG(hw, IXGBE_EICR);
	ixgbe_irq_enable(adapter, true, true);

	/*
	 * If this adapter has a fan, check to see if we had a failure
	 * before we enabled the interrupt.
	 */
	if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE) {
		u32 esdp = IXGBE_READ_REG(hw, IXGBE_ESDP);
		if (esdp & IXGBE_ESDP_SDP1)
			e_crit(drv, "Fan has stopped, replace the adapter\n");
	}

	/* enable transmits */
	netif_tx_start_all_queues(adapter->netdev);

	/* bring the link up in the watchdog, this could race with our first
	 * link up interrupt but shouldn't be a problem */
	adapter->flags |= IXGBE_FLAG_NEED_LINK_UPDATE;
	adapter->link_check_timeout = jiffies;
	mod_timer(&adapter->service_timer, jiffies);

	ixgbe_clear_vf_stats_counters(adapter);
	/* Set PF Reset Done bit so PF/VF Mail Ops can work */
	ctrl_ext = IXGBE_READ_REG(hw, IXGBE_CTRL_EXT);
	ctrl_ext |= IXGBE_CTRL_EXT_PFRSTD;
	IXGBE_WRITE_REG(hw, IXGBE_CTRL_EXT, ctrl_ext);
}

void ixgbe_reinit_locked(struct ixgbe_adapter *adapter)
{
	WARN_ON(in_interrupt());
	/* put off any impending NetWatchDogTimeout */
#ifdef HAVE_NETIF_TRANS_UPDATE
	netif_trans_update(adapter->netdev);
#else
	adapter->netdev->trans_start = jiffies;
#endif

	while (test_and_set_bit(__IXGBE_RESETTING, &adapter->state))
		usleep_range(1000, 2000);
	if (adapter->hw.phy.type == ixgbe_phy_fw)
		ixgbe_watchdog_link_is_down(adapter);
	ixgbe_down(adapter);
	/*
	 * If SR-IOV enabled then wait a bit before bringing the adapter
	 * back up to give the VFs time to respond to the reset.  The
	 * two second wait is based upon the watchdog timer cycle in
	 * the VF driver.
	 */
	if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)
		msleep(2000);
	ixgbe_up(adapter);
	clear_bit(__IXGBE_RESETTING, &adapter->state);
}

void ixgbe_up(struct ixgbe_adapter *adapter)
{
	/* hardware has been reset, we need to reload some things */
	ixgbe_configure(adapter);

	ixgbe_up_complete(adapter);
}

void ixgbe_reset(struct ixgbe_adapter *adapter)
{
	struct ixgbe_hw *hw = &adapter->hw;
#ifdef HAVE_SET_RX_MODE
	struct net_device *netdev = adapter->netdev;
#endif
	int err;

	if (IXGBE_REMOVED(hw->hw_addr))
		return;
	/* lock SFP init bit to prevent race conditions with the watchdog */
	while (test_and_set_bit(__IXGBE_IN_SFP_INIT, &adapter->state))
		usleep_range(1000, 2000);

	/* clear all SFP and link config related flags while holding SFP_INIT */
	adapter->flags2 &= ~(IXGBE_FLAG2_SEARCH_FOR_SFP |
			     IXGBE_FLAG2_SFP_NEEDS_RESET);
	adapter->flags &= ~IXGBE_FLAG_NEED_LINK_CONFIG;

	err = hw->mac.ops.init_hw(hw);
	switch (err) {
	case IXGBE_SUCCESS:
	case IXGBE_ERR_SFP_NOT_PRESENT:
	case IXGBE_ERR_SFP_NOT_SUPPORTED:
		break;
	case IXGBE_ERR_MASTER_REQUESTS_PENDING:
		e_dev_err("master disable timed out\n");
		break;
	case IXGBE_ERR_EEPROM_VERSION:
		/* We are running on a pre-production device, log a warning */
		e_dev_warn("This device is a pre-production adapter/LOM. "
			   "Please be aware there may be issues associated "
			   "with your hardware.  If you are experiencing "
			   "problems please contact your Intel or hardware "
			   "representative who provided you with this "
			   "hardware.\n");
		break;
	case IXGBE_ERR_OVERTEMP:
		e_crit(drv, "%s\n", ixgbe_overheat_msg);
		break;
	default:
		e_dev_err("Hardware Error: %d\n", err);
	}

	clear_bit(__IXGBE_IN_SFP_INIT, &adapter->state);

	/* flush entries out of MAC table */
	ixgbe_flush_sw_mac_table(adapter);
#ifdef HAVE_SET_RX_MODE
	__dev_uc_unsync(netdev, NULL);
#endif

	/* do not flush user set addresses */
	ixgbe_mac_set_default_filter(adapter);

	/* update SAN MAC vmdq pool selection */
	if (hw->mac.san_mac_rar_index)
		hw->mac.ops.set_vmdq_san_mac(hw, VMDQ_P(0));

	/* Clear saved DMA coalescing values except for watchdog_timer */
	hw->mac.dmac_config.fcoe_en = false;
	hw->mac.dmac_config.link_speed = 0;
	hw->mac.dmac_config.fcoe_tc = 0;
	hw->mac.dmac_config.num_tcs = 0;

#ifdef HAVE_PTP_1588_CLOCK
	if (test_bit(__IXGBE_PTP_RUNNING, &adapter->state))
		ixgbe_ptp_reset(adapter);
#endif

	if (!netif_running(adapter->netdev) && !adapter->wol)
		ixgbe_set_phy_power(hw, false);
	else
		ixgbe_set_phy_power(hw, true);
}

/**
 * ixgbe_clean_tx_ring - Free Tx Buffers
 * @tx_ring: ring to be cleaned
 **/
static void ixgbe_clean_tx_ring(struct ixgbe_ring *tx_ring)
{
	u16 i = tx_ring->next_to_clean;
	struct ixgbe_tx_buffer *tx_buffer = &tx_ring->tx_buffer_info[i];

	while (i != tx_ring->next_to_use) {
		union ixgbe_adv_tx_desc *eop_desc, *tx_desc;

		/* Free all the Tx ring sk_buffs */
		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);

		/* check for eop_desc to determine the end of the packet */
		eop_desc = tx_buffer->next_to_watch;
		tx_desc = IXGBE_TX_DESC(tx_ring, i);

		/* unmap remaining buffers */
		while (tx_desc != eop_desc) {
			tx_buffer++;
			tx_desc++;
			i++;
			if (unlikely(i == tx_ring->count)) {
				i = 0;
				tx_buffer = tx_ring->tx_buffer_info;
				tx_desc = IXGBE_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);
		}

		/* move us one more past the eop_desc for start of next pkt */
		tx_buffer++;
		i++;
		if (unlikely(i == tx_ring->count)) {
			i = 0;
			tx_buffer = tx_ring->tx_buffer_info;
		}
	}

	/* reset BQL for queue */
	netdev_tx_reset_queue(txring_txq(tx_ring));

	/* reset next_to_use and next_to_clean */
	tx_ring->next_to_use = 0;
	tx_ring->next_to_clean = 0;
}

/**
 * ixgbe_clean_all_rx_rings - Free Rx Buffers for all queues
 * @adapter: board private structure
 **/
static void ixgbe_clean_all_rx_rings(struct ixgbe_adapter *adapter)
{
	int i;

	for (i = 0; i < adapter->num_rx_queues; i++)
		ixgbe_clean_rx_ring(adapter->rx_ring[i]);
}

/**
 * ixgbe_clean_all_tx_rings - Free Tx Buffers for all queues
 * @adapter: board private structure
 **/
static void ixgbe_clean_all_tx_rings(struct ixgbe_adapter *adapter)
{
	int i;

	for (i = 0; i < adapter->num_tx_queues; i++)
		ixgbe_clean_tx_ring(adapter->tx_ring[i]);
}

static void ixgbe_fdir_filter_exit(struct ixgbe_adapter *adapter)
{
	struct hlist_node *node2;
	struct ixgbe_fdir_filter *filter;

	spin_lock(&adapter->fdir_perfect_lock);

	hlist_for_each_entry_safe(filter, node2,
				  &adapter->fdir_filter_list, fdir_node) {
		hlist_del(&filter->fdir_node);
		kfree(filter);
	}
	adapter->fdir_filter_count = 0;

	spin_unlock(&adapter->fdir_perfect_lock);
}

void ixgbe_down(struct ixgbe_adapter *adapter)
{
	struct net_device *netdev = adapter->netdev;
	struct ixgbe_hw *hw = &adapter->hw;
	int i;

	/* signal that we are down to the interrupt handler */
	if (test_and_set_bit(__IXGBE_DOWN, &adapter->state))
		return; /* do nothing if already down */

	/* disable receives */
	ixgbe_disable_rx(hw);

	/* disable all enabled rx queues */
	for (i = 0; i < adapter->num_rx_queues; i++)
		/* this call also flushes the previous write */
		ixgbe_disable_rx_queue(adapter, adapter->rx_ring[i]);

	usleep_range(10000, 20000);

	netif_tx_stop_all_queues(netdev);

	/* call carrier off first to avoid false dev_watchdog timeouts */
	netif_carrier_off(netdev);
	netif_tx_disable(netdev);

	ixgbe_irq_disable(adapter);

	ixgbe_napi_disable_all(adapter);

	adapter->flags2 &= ~(IXGBE_FLAG2_FDIR_REQUIRES_REINIT);
	clear_bit(__IXGBE_RESET_REQUESTED, &adapter->state);
	adapter->flags &= ~IXGBE_FLAG_NEED_LINK_UPDATE;

	del_timer_sync(&adapter->service_timer);

	if (adapter->num_vfs) {
		/* Clear EITR Select mapping */
		IXGBE_WRITE_REG(&adapter->hw, IXGBE_EITRSEL, 0);

		/* Mark all the VFs as inactive */
		for (i = 0 ; i < adapter->num_vfs; i++)
			adapter->vfinfo[i].clear_to_send = 0;

		/* ping all the active vfs to let them know we are going down */
		ixgbe_ping_all_vfs(adapter);

		/* Disable all VFTE/VFRE TX/RX */
		ixgbe_disable_tx_rx(adapter);
	}

	/* disable transmits in the hardware now that interrupts are off */
	for (i = 0; i < adapter->num_tx_queues; i++) {
		u8 reg_idx = adapter->tx_ring[i]->reg_idx;
		IXGBE_WRITE_REG(hw, IXGBE_TXDCTL(reg_idx), IXGBE_TXDCTL_SWFLSH);
	}

	/* Disable the Tx DMA engine on 82599 and X540 */
	switch (hw->mac.type) {
	case ixgbe_mac_82599EB:
	case ixgbe_mac_X540:
	case ixgbe_mac_X550:
	case ixgbe_mac_X550EM_x:
	case ixgbe_mac_X550EM_a:
		IXGBE_WRITE_REG(hw, IXGBE_DMATXCTL,
				(IXGBE_READ_REG(hw, IXGBE_DMATXCTL) &
				 ~IXGBE_DMATXCTL_TE));
		break;
	default:
		break;
	}

#ifdef HAVE_PCI_ERS
	if (!pci_channel_offline(adapter->pdev))
#endif
		ixgbe_reset(adapter);

	/* power down the optics for 82599 SFP+ fiber */
	if (hw->mac.ops.disable_tx_laser)
		hw->mac.ops.disable_tx_laser(hw);

	ixgbe_clean_all_tx_rings(adapter);
	ixgbe_clean_all_rx_rings(adapter);
}

/**
 * ixgbe_eee_capable - helper function to determine EEE support on X550
 *
 **/
static inline void ixgbe_set_eee_capable(struct ixgbe_adapter *adapter)
{
	struct ixgbe_hw *hw = &adapter->hw;

	switch (hw->device_id) {
	case IXGBE_DEV_ID_X550EM_A_1G_T:
	case IXGBE_DEV_ID_X550EM_A_1G_T_L:
		if (!hw->phy.eee_speeds_supported)
			break;
		adapter->flags2 |= IXGBE_FLAG2_EEE_CAPABLE;
		if (!hw->phy.eee_speeds_advertised)
			break;
		adapter->flags2 |= IXGBE_FLAG2_EEE_ENABLED;
		break;
	default:
		adapter->flags2 &= ~IXGBE_FLAG2_EEE_CAPABLE;
		adapter->flags2 &= ~IXGBE_FLAG2_EEE_ENABLED;
		break;
	}
}

#if IS_ENABLED(CONFIG_DCB)
static void ixgbe_init_dcb(struct ixgbe_adapter *adapter)
{
	struct ixgbe_dcb_tc_config *tc;
	int j, bwg_pct;

	/* Configure DCB traffic classes */
	bwg_pct = 100 / adapter->dcb_cfg.num_tcs.pg_tcs;
	for (j = 0; j < adapter->dcb_cfg.num_tcs.pg_tcs; j++) {
		tc = &adapter->dcb_cfg.tc_config[j];
		tc->path[IXGBE_DCB_TX_CONFIG].bwg_id = 0;
		tc->path[IXGBE_DCB_TX_CONFIG].bwg_percent = bwg_pct;
		tc->path[IXGBE_DCB_RX_CONFIG].bwg_id = 0;
		tc->path[IXGBE_DCB_RX_CONFIG].bwg_percent = bwg_pct;
		tc->pfc = ixgbe_dcb_pfc_disabled;
	}

	/* reset back to TC 0 */
	tc = &adapter->dcb_cfg.tc_config[0];

	/* total of all TCs bandwidth needs to be 100 */
	bwg_pct += 100 % adapter->dcb_cfg.num_tcs.pg_tcs;
	tc->path[IXGBE_DCB_TX_CONFIG].bwg_percent = bwg_pct;
	tc->path[IXGBE_DCB_RX_CONFIG].bwg_percent = bwg_pct;

	/* Initialize default user to priority mapping, UPx->TC0 */
	tc->path[IXGBE_DCB_TX_CONFIG].up_to_tc_bitmap = 0xFF;
	tc->path[IXGBE_DCB_RX_CONFIG].up_to_tc_bitmap = 0xFF;

	adapter->dcb_cfg.bw_percentage[IXGBE_DCB_TX_CONFIG][0] = 100;
	adapter->dcb_cfg.bw_percentage[IXGBE_DCB_RX_CONFIG][0] = 100;
	adapter->dcb_cfg.rx_pba_cfg = ixgbe_dcb_pba_equal;
	adapter->dcb_cfg.pfc_mode_enable = false;
	adapter->dcb_cfg.round_robin_enable = false;
	adapter->dcb_set_bitmap = 0x00;
	if (adapter->flags & IXGBE_FLAG_DCB_CAPABLE)
		adapter->dcbx_cap = DCB_CAP_DCBX_HOST | DCB_CAP_DCBX_VER_CEE;
	memcpy(&adapter->temp_dcb_cfg, &adapter->dcb_cfg,
	       sizeof(adapter->temp_dcb_cfg));
}
#endif /*CONFIG_DCB*/

/**
 * ixgbe_sw_init - Initialize general software structures (struct ixgbe_adapter)
 * @adapter: board private structure to initialize
 *
 * ixgbe_sw_init initializes the Adapter private data structure.
 * Fields are initialized based on PCI device information and
 * OS network device settings (MTU size).
 **/
static int __devinit ixgbe_sw_init(struct ixgbe_adapter *adapter)
{
	struct ixgbe_hw *hw = &adapter->hw;
	struct pci_dev *pdev = adapter->pdev;
	int err;
	unsigned int fdir;
	u32 fwsm;
	u16 device_caps;

	/* PCI config space info */

	hw->vendor_id = pdev->vendor;
	hw->device_id = pdev->device;
	pci_read_config_byte(pdev, PCI_REVISION_ID, &hw->revision_id);
	if (hw->revision_id == IXGBE_FAILED_READ_CFG_BYTE &&
	    ixgbe_check_cfg_remove(hw, pdev)) {
		e_err(probe, "read of revision id failed\n");
		err = -ENODEV;
		goto out;
	}
	hw->subsystem_vendor_id = pdev->subsystem_vendor;
	hw->subsystem_device_id = pdev->subsystem_device;

	err = ixgbe_init_shared_code(hw);
	if (err) {
		e_err(probe, "init_shared_code failed: %d\n", err);
		goto out;
	}
	adapter->mac_table = kzalloc(sizeof(struct ixgbe_mac_addr) *
				     hw->mac.num_rar_entries,
				     GFP_ATOMIC);
	if (!adapter->mac_table) {
		err = IXGBE_ERR_OUT_OF_MEM;
		e_err(probe, "mac_table allocation failed: %d\n", err);
		goto out;
	}

	if (ixgbe_init_rss_key(adapter)) {
		err = IXGBE_ERR_OUT_OF_MEM;
		e_err(probe, "rss_key allocation failed: %d\n", err);
		goto out;
	}

	/* Set common capability flags and settings */
#if IS_ENABLED(CONFIG_DCA)
	adapter->flags |= IXGBE_FLAG_DCA_CAPABLE;
#endif
#if IS_ENABLED(CONFIG_DCB)
	adapter->flags |= IXGBE_FLAG_DCB_CAPABLE;
	adapter->flags &= ~IXGBE_FLAG_DCB_ENABLED;
#endif
#if IS_ENABLED(CONFIG_FCOE)
	adapter->flags |= IXGBE_FLAG_FCOE_CAPABLE;
	adapter->flags &= ~IXGBE_FLAG_FCOE_ENABLED;
#if IS_ENABLED(CONFIG_DCB)
	/* Default traffic class to use for FCoE */
	adapter->fcoe.up = IXGBE_FCOE_DEFUP;
	adapter->fcoe.up_set = IXGBE_FCOE_DEFUP;
#endif /* CONFIG_DCB */
#endif /* CONFIG_FCOE */
	adapter->flags2 |= IXGBE_FLAG2_RSC_CAPABLE;
	fdir = min_t(int, IXGBE_MAX_FDIR_INDICES, num_online_cpus());
	adapter->ring_feature[RING_F_FDIR].limit = fdir;
	adapter->max_q_vectors = IXGBE_MAX_MSIX_Q_VECTORS_82599;

	/* Set MAC specific capability flags and exceptions */
	switch (hw->mac.type) {
	case ixgbe_mac_82598EB:
		adapter->flags |= IXGBE_FLAGS_82598_INIT;
		adapter->flags2 &= ~IXGBE_FLAG2_RSC_CAPABLE;

		if (hw->device_id == IXGBE_DEV_ID_82598AT)
			adapter->flags |= IXGBE_FLAG_FAN_FAIL_CAPABLE;

		adapter->max_q_vectors = IXGBE_MAX_MSIX_Q_VECTORS_82598;
		adapter->ring_feature[RING_F_FDIR].limit = 0;
#if IS_ENABLED(CONFIG_FCOE)
		adapter->flags &= ~IXGBE_FLAG_FCOE_CAPABLE;
#if IS_ENABLED(CONFIG_DCB)
		adapter->fcoe.up = 0;
		adapter->fcoe.up_set = 0;
#endif /* IXGBE_DCB */
#endif /* CONFIG_FCOE */
		break;
	case ixgbe_mac_82599EB:
		adapter->flags |= IXGBE_FLAGS_82599_INIT;
		if (hw->device_id == IXGBE_DEV_ID_82599_T3_LOM)
			adapter->flags2 |= IXGBE_FLAG2_TEMP_SENSOR_CAPABLE;
#ifndef IXGBE_NO_SMART_SPEED
		hw->phy.smart_speed = ixgbe_smart_speed_on;
#else
		hw->phy.smart_speed = ixgbe_smart_speed_off;
#endif
		break;
	case ixgbe_mac_X540:
		adapter->flags |= IXGBE_FLAGS_X540_INIT;
		fwsm = IXGBE_READ_REG(hw, IXGBE_FWSM);
		if (fwsm & IXGBE_FWSM_TS_ENABLED)
			adapter->flags2 |= IXGBE_FLAG2_TEMP_SENSOR_CAPABLE;
		break;
	case ixgbe_mac_X550EM_a:
		adapter->flags |= IXGBE_FLAG_GENEVE_OFFLOAD_CAPABLE;
		switch (hw->device_id) {
		case IXGBE_DEV_ID_X550EM_A_1G_T:
		case IXGBE_DEV_ID_X550EM_A_1G_T_L:
			adapter->flags2 |= IXGBE_FLAG2_TEMP_SENSOR_CAPABLE;
			break;
		default:
			break;
		}
		/* fall through */
	case ixgbe_mac_X550EM_x:
#if IS_ENABLED(CONFIG_DCB)
		adapter->flags &= ~IXGBE_FLAG_DCB_CAPABLE;
#endif
#if IS_ENABLED(CONFIG_FCOE)
		adapter->flags &= ~IXGBE_FLAG_FCOE_CAPABLE;
#if IS_ENABLED(CONFIG_DCB)
		adapter->fcoe.up = 0;
		adapter->fcoe.up_set = 0;
#endif /* CONFIG_DCB */
#endif /* CONFIG_FCOE */
	/* fall through */
	case ixgbe_mac_X550:
		if (hw->mac.type == ixgbe_mac_X550)
			adapter->flags2 |= IXGBE_FLAG2_TEMP_SENSOR_CAPABLE;
		ixgbe_set_eee_capable(adapter);
		adapter->flags |= IXGBE_FLAGS_X550_INIT;
#if IS_ENABLED(CONFIG_DCA)
		adapter->flags &= ~IXGBE_FLAG_DCA_CAPABLE;
#endif /* CONFIG_DCA */
	default:
		break;
	}

#if IS_ENABLED(CONFIG_FCOE)
	/* FCoE support exists, always init the FCoE lock */
	spin_lock_init(&adapter->fcoe.lock);
#endif /* CONFIG_FCOE */

	/* n-tuple support exists, always init our spinlock */
	spin_lock_init(&adapter->fdir_perfect_lock);

#if IS_ENABLED(CONFIG_DCB)
	switch (hw->mac.type) {
	case ixgbe_mac_82598EB:
	case ixgbe_mac_82599EB:
		adapter->dcb_cfg.num_tcs.pg_tcs = 8;
		adapter->dcb_cfg.num_tcs.pfc_tcs = 8;
		break;
	case ixgbe_mac_X540:
	case ixgbe_mac_X550:
		adapter->dcb_cfg.num_tcs.pg_tcs = 4;
		adapter->dcb_cfg.num_tcs.pfc_tcs = 4;
		break;
	case ixgbe_mac_X550EM_x:
	case ixgbe_mac_X550EM_a:
	default:
		adapter->dcb_cfg.num_tcs.pg_tcs = 1;
		adapter->dcb_cfg.num_tcs.pfc_tcs = 1;
		break;
	}
	ixgbe_init_dcb(adapter);

#endif /* CONFIG_DCB */

	if (hw->mac.type == ixgbe_mac_82599EB ||
	    hw->mac.type == ixgbe_mac_X550 ||
	    hw->mac.type == ixgbe_mac_X550EM_x ||
	    hw->mac.type == ixgbe_mac_X550EM_a ||
	    hw->mac.type == ixgbe_mac_X540)
		hw->mbx.ops.init_params(hw);

	/* default flow control settings */
	hw->fc.requested_mode = ixgbe_fc_full;
	hw->fc.current_mode = ixgbe_fc_full;	/* init for ethtool output */

	adapter->last_lfc_mode = hw->fc.current_mode;
	ixgbe_pbthresh_setup(adapter);
	hw->fc.pause_time = IXGBE_DEFAULT_FCPAUSE;
	hw->fc.send_xon = true;
	hw->fc.disable_fc_autoneg = false;

	/* set default ring sizes */
	adapter->tx_ring_count = IXGBE_DEFAULT_TXD;
	adapter->rx_ring_count = IXGBE_DEFAULT_RXD;

	/* set default work limits */
	adapter->tx_work_limit = IXGBE_DEFAULT_TX_WORK;
	adapter->rx_work_limit = IXGBE_DEFAULT_RX_WORK;

	/* Cache bit indicating need for crosstalk fix */
	switch (hw->mac.type) {
	case ixgbe_mac_82599EB:
	case ixgbe_mac_X550EM_x:
	case ixgbe_mac_X550EM_a:
		hw->mac.ops.get_device_caps(hw, &device_caps);
		if (device_caps & IXGBE_DEVICE_CAPS_NO_CROSSTALK_WR)
			adapter->need_crosstalk_fix = false;
		else
			adapter->need_crosstalk_fix = true;
		break;
	default:
		adapter->need_crosstalk_fix = false;
		break;
	}
	set_bit(__IXGBE_DOWN, &adapter->state);
out:
	return err;
}

/**
 * ixgbe_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 ixgbe_setup_tx_resources(struct ixgbe_ring *tx_ring)
{
	struct device *dev = tx_ring->dev;
	int orig_node = dev_to_node(dev);
	int numa_node = -1;
	int size;

	size = sizeof(struct ixgbe_tx_buffer) * tx_ring->count;

	if (tx_ring->q_vector)
		numa_node = tx_ring->q_vector->numa_node;

	tx_ring->tx_buffer_info = vmalloc_node(size, numa_node);
	if (!tx_ring->tx_buffer_info)
		tx_ring->tx_buffer_info = vmalloc(size);
	if (!tx_ring->tx_buffer_info)
		goto err;

	/* round up to nearest 4K */
	tx_ring->size = tx_ring->count * sizeof(union ixgbe_adv_tx_desc);
	tx_ring->size = ALIGN(tx_ring->size, 4096);

	set_dev_node(dev, numa_node);
	tx_ring->desc = dma_alloc_coherent(dev,
					   tx_ring->size,
					   &tx_ring->dma,
					   GFP_KERNEL);
	set_dev_node(dev, orig_node);
	if (!tx_ring->desc)
		tx_ring->desc = dma_alloc_coherent(dev, tx_ring->size,
						   &tx_ring->dma, GFP_KERNEL);
	if (!tx_ring->desc)
		goto err;

	return 0;

err:
	vfree(tx_ring->tx_buffer_info);
	tx_ring->tx_buffer_info = NULL;
	dev_err(dev, "Unable to allocate memory for the Tx descriptor ring\n");
	return -ENOMEM;
}

/**
 * ixgbe_setup_all_tx_resources - allocate all queues Tx resources
 * @adapter: board private structure
 *
 * If this function returns with an error, then it's possible one or
 * more of the rings is populated (while the rest are not).  It is the
 * callers duty to clean those orphaned rings.
 *
 * Return 0 on success, negative on failure
 **/
static int ixgbe_setup_all_tx_resources(struct ixgbe_adapter *adapter)
{
	int i, err = 0;

	for (i = 0; i < adapter->num_tx_queues; i++) {

		err = ixgbe_setup_tx_resources(adapter->tx_ring[i]);
		if (!err)
			continue;

		e_err(probe, "Allocation for Tx Queue %u failed\n", i);
		goto err_setup_tx;
	}

	return 0;
err_setup_tx:
	/* rewind the index freeing the rings as we go */
	while (i--)
		ixgbe_free_tx_resources(adapter->tx_ring[i]);
	return err;
}

/**
 * ixgbe_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 ixgbe_setup_rx_resources(struct ixgbe_ring *rx_ring)
{
	struct device *dev = rx_ring->dev;
	int orig_node = dev_to_node(dev);
	int numa_node = -1;
	int size;

	size = sizeof(struct ixgbe_rx_buffer) * rx_ring->count;

	if (rx_ring->q_vector)
		numa_node = rx_ring->q_vector->numa_node;

	rx_ring->rx_buffer_info = vmalloc_node(size, numa_node);
	if (!rx_ring->rx_buffer_info)
		rx_ring->rx_buffer_info = vmalloc(size);
	if (!rx_ring->rx_buffer_info)
		goto err;

	/* Round up to nearest 4K */
	rx_ring->size = rx_ring->count * sizeof(union ixgbe_adv_rx_desc);
	rx_ring->size = ALIGN(rx_ring->size, 4096);

	set_dev_node(dev, numa_node);
	rx_ring->desc = dma_alloc_coherent(dev,
					   rx_ring->size,
					   &rx_ring->dma,
					   GFP_KERNEL);
	set_dev_node(dev, orig_node);
	if (!rx_ring->desc)
		rx_ring->desc = dma_alloc_coherent(dev, rx_ring->size,
						   &rx_ring->dma, GFP_KERNEL);
	if (!rx_ring->desc)
		goto err;

	return 0;
err:
	vfree(rx_ring->rx_buffer_info);
	rx_ring->rx_buffer_info = NULL;
	dev_err(dev, "Unable to allocate memory for the Rx descriptor ring\n");
	return -ENOMEM;
}

/**
 * ixgbe_setup_all_rx_resources - allocate all queues Rx resources
 * @adapter: board private structure
 *
 * If this function returns with an error, then it's possible one or
 * more of the rings is populated (while the rest are not).  It is the
 * callers duty to clean those orphaned rings.
 *
 * Return 0 on success, negative on failure
 **/
static int ixgbe_setup_all_rx_resources(struct ixgbe_adapter *adapter)
{
	int i, err = 0;

	for (i = 0; i < adapter->num_rx_queues; i++) {
		err = ixgbe_setup_rx_resources(adapter->rx_ring[i]);
		if (!err) {
			continue;
		}

		e_err(probe, "Allocation for Rx Queue %u failed\n", i);
		goto err_setup_rx;
	}

#if IS_ENABLED(CONFIG_FCOE)
	err = ixgbe_setup_fcoe_ddp_resources(adapter);
	if (!err)
#endif
		return 0;
err_setup_rx:
	/* rewind the index freeing the rings as we go */
	while (i--)
		ixgbe_free_rx_resources(adapter->rx_ring[i]);
	return err;
}

/**
 * ixgbe_free_tx_resources - Free Tx Resources per Queue
 * @tx_ring: Tx descriptor ring for a specific queue
 *
 * Free all transmit software resources
 **/
void ixgbe_free_tx_resources(struct ixgbe_ring *tx_ring)
{
	ixgbe_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;
}

/**
 * ixgbe_free_all_tx_resources - Free Tx Resources for All Queues
 * @adapter: board private structure
 *
 * Free all transmit software resources
 **/
static void ixgbe_free_all_tx_resources(struct ixgbe_adapter *adapter)
{
	int i;

	for (i = 0; i < adapter->num_tx_queues; i++)
		ixgbe_free_tx_resources(adapter->tx_ring[i]);
}

/**
 * ixgbe_free_rx_resources - Free Rx Resources
 * @rx_ring: ring to clean the resources from
 *
 * Free all receive software resources
 **/
void ixgbe_free_rx_resources(struct ixgbe_ring *rx_ring)
{
	ixgbe_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;
}

/**
 * ixgbe_free_all_rx_resources - Free Rx Resources for All Queues
 * @adapter: board private structure
 *
 * Free all receive software resources
 **/
static void ixgbe_free_all_rx_resources(struct ixgbe_adapter *adapter)
{
	int i;

#if IS_ENABLED(CONFIG_FCOE)
	ixgbe_free_fcoe_ddp_resources(adapter);
#endif

	for (i = 0; i < adapter->num_rx_queues; i++)
		ixgbe_free_rx_resources(adapter->rx_ring[i]);
}

/**
 * ixgbe_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 ixgbe_change_mtu(struct net_device *netdev, int new_mtu)
{
	struct ixgbe_adapter *adapter = netdev_priv(netdev);
#ifndef HAVE_NETDEVICE_MIN_MAX_MTU
	int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
#endif

#ifndef HAVE_NETDEVICE_MIN_MAX_MTU
	/* MTU < 68 is an error and causes problems on some kernels */
	if ((new_mtu < 68) || (max_frame > IXGBE_MAX_JUMBO_FRAME_SIZE))
		return -EINVAL;

#endif
	/*
	 * For 82599EB we cannot allow legacy VFs to enable their receive
	 * paths when MTU greater than 1500 is configured.  So display a
	 * warning that legacy VFs will be disabled.
	 */
	if ((adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) &&
	    (adapter->hw.mac.type == ixgbe_mac_82599EB) &&
#ifndef HAVE_NETDEVICE_MIN_MAX_MTU
	    (max_frame > (ETH_FRAME_LEN + ETH_FCS_LEN)))
#else
	    (new_mtu > ETH_DATA_LEN))
#endif
		e_warn(probe, "Setting MTU > 1500 will disable legacy VFs\n");

	e_info(probe, "changing MTU from %d to %d\n", netdev->mtu, new_mtu);

	/* must set new MTU before calling down or up */
	netdev->mtu = new_mtu;

	if (netif_running(netdev))
		ixgbe_reinit_locked(adapter);

	return 0;
}

/**
 * ixgbe_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 ixgbe_open(struct net_device *netdev)
{
	struct ixgbe_adapter *adapter = netdev_priv(netdev);
	int err;

	/* disallow open during test */
	if (test_bit(__IXGBE_TESTING, &adapter->state))
		return -EBUSY;

	netif_carrier_off(netdev);

	/* allocate transmit descriptors */
	err = ixgbe_setup_all_tx_resources(adapter);
	if (err)
		goto err_setup_tx;

	/* allocate receive descriptors */
	err = ixgbe_setup_all_rx_resources(adapter);
	if (err)
		goto err_setup_rx;

	ixgbe_configure(adapter);

	err = ixgbe_request_irq(adapter);
	if (err)
		goto err_req_irq;

	/* Notify the stack of the actual queue counts. */
	err = netif_set_real_num_tx_queues(netdev,
					   adapter->num_rx_pools > 1 ? 1 :
					   adapter->num_tx_queues);
	if (err)
		goto err_set_queues;

	err = netif_set_real_num_rx_queues(netdev,
					   adapter->num_rx_pools > 1 ? 1 :
					   adapter->num_rx_queues);
	if (err)
		goto err_set_queues;

#ifdef HAVE_PTP_1588_CLOCK
	ixgbe_ptp_init(adapter);
#endif /* HAVE_PTP_1588_CLOCK*/

	ixgbe_up_complete(adapter);

#if defined(HAVE_UDP_ENC_RX_OFFLOAD) || defined(HAVE_VXLAN_RX_OFFLOAD)
	ixgbe_clear_udp_tunnel_port(adapter, IXGBE_VXLANCTRL_ALL_UDPPORT_MASK);
#endif
#ifdef HAVE_UDP_ENC_RX_OFFLOAD
	udp_tunnel_get_rx_info(netdev);
#elif defined(HAVE_VXLAN_RX_OFFLOAD)
	vxlan_get_rx_port(netdev);
#endif /* HAVE_UDP_ENC_RX_OFFLOAD */
	return IXGBE_SUCCESS;

err_set_queues:
	ixgbe_free_irq(adapter);
err_req_irq:
	ixgbe_free_all_rx_resources(adapter);
	if (!adapter->wol)
		ixgbe_set_phy_power(&adapter->hw, false);
err_setup_rx:
	ixgbe_free_all_tx_resources(adapter);
err_setup_tx:
	ixgbe_reset(adapter);

	return err;
}

/**
 * ixgbe_close_suspend - actions necessary to both suspend and close flows
 * @adapter: the private adapter struct
 *
 * This function should contain the necessary work common to both suspending
 * and closing of the device.
 */
static void ixgbe_close_suspend(struct ixgbe_adapter *adapter)
{
#ifdef HAVE_PTP_1588_CLOCK
	ixgbe_ptp_suspend(adapter);
#endif

	if (adapter->hw.phy.ops.enter_lplu) {
		adapter->hw.phy.reset_disable = true;
		ixgbe_down(adapter);
		ixgbe_enter_lplu(&adapter->hw);
		adapter->hw.phy.reset_disable = false;
	} else {
		ixgbe_down(adapter);
	}
	ixgbe_free_irq(adapter);

	ixgbe_free_all_rx_resources(adapter);
	ixgbe_free_all_tx_resources(adapter);
}

/**
 * ixgbe_close - Disables a network interface
 * @netdev: network interface device structure
 *
 * Returns 0, this is not allowed to fail
 *
 * The close entry point is called when an interface is de-activated
 * by the OS.  The hardware is still under the drivers control, but
 * needs to be disabled.  A global MAC reset is issued to stop the
 * hardware, and all transmit and receive resources are freed.
 **/
static int ixgbe_close(struct net_device *netdev)
{
	struct ixgbe_adapter *adapter = netdev_priv(netdev);

#ifdef HAVE_PTP_1588_CLOCK
	ixgbe_ptp_stop(adapter);
#endif

	if (netif_device_present(netdev))
		ixgbe_close_suspend(adapter);

	ixgbe_fdir_filter_exit(adapter);

	ixgbe_release_hw_control(adapter);

	return 0;
}

#ifdef CONFIG_PM
#ifndef USE_LEGACY_PM_SUPPORT
static int ixgbe_resume(struct device *dev)
#else
static int ixgbe_resume(struct pci_dev *pdev)
#endif /* USE_LEGACY_PM_SUPPORT */
{
	struct ixgbe_adapter *adapter;
	struct net_device *netdev;
	u32 err;
#ifndef USE_LEGACY_PM_SUPPORT
	struct pci_dev *pdev = to_pci_dev(dev);
#endif

	adapter = pci_get_drvdata(pdev);
	netdev = adapter->netdev;
	adapter->hw.hw_addr = adapter->io_addr;
	pci_set_power_state(pdev, PCI_D0);
	pci_restore_state(pdev);
	/*
	 * pci_restore_state clears dev->state_saved so call
	 * pci_save_state to restore it.
	 */
	pci_save_state(pdev);

	err = pci_enable_device_mem(pdev);
	if (err) {
		e_dev_err("Cannot enable PCI device from suspend\n");
		return err;
	}
	smp_mb__before_atomic();
	clear_bit(__IXGBE_DISABLED, &adapter->state);
	pci_set_master(pdev);

	pci_wake_from_d3(pdev, false);

	ixgbe_reset(adapter);

	IXGBE_WRITE_REG(&adapter->hw, IXGBE_WUS, ~0);

	rtnl_lock();

	err = ixgbe_init_interrupt_scheme(adapter);
	if (!err && netif_running(netdev))
		err = ixgbe_open(netdev);


	if (!err)
		netif_device_attach(netdev);

	rtnl_unlock();

	return err;
}

#ifndef USE_LEGACY_PM_SUPPORT
/**
 * ixgbe_freeze - quiesce the device (no IRQ's or DMA)
 * @dev: The port's netdev
 */
static int ixgbe_freeze(struct device *dev)
{
	struct ixgbe_adapter *adapter = pci_get_drvdata(to_pci_dev(dev));
	struct net_device *netdev = adapter->netdev;
	bool lplu_enabled = !!adapter->hw.phy.ops.enter_lplu;

	rtnl_lock();
	netif_device_detach(netdev);

	if (netif_running(netdev)) {
		if (lplu_enabled) {
			adapter->hw.phy.reset_disable = true;
			ixgbe_down(adapter);
			adapter->hw.phy.reset_disable = false;
		} else {
			ixgbe_down(adapter);
		}
		ixgbe_free_irq(adapter);
	}

	ixgbe_reset_interrupt_capability(adapter);
	rtnl_unlock();

	return 0;
}

/**
 * ixgbe_thaw - un-quiesce the device
 * @dev: The port's netdev
 */
static int ixgbe_thaw(struct device *dev)
{
	struct ixgbe_adapter *adapter = pci_get_drvdata(to_pci_dev(dev));
	struct net_device *netdev = adapter->netdev;
	bool lplu_enabled = !!adapter->hw.phy.ops.enter_lplu;

	ixgbe_set_interrupt_capability(adapter);

	if (netif_running(netdev)) {
		u32 err = ixgbe_request_irq(adapter);
		if (err)
			return err;

		if (lplu_enabled) {
			adapter->hw.phy.reset_disable = true;
			ixgbe_up(adapter);
			adapter->hw.phy.reset_disable = false;
		} else {
			ixgbe_up(adapter);
		}
	}

	netif_device_attach(netdev);

	return 0;
}
#endif /* USE_LEGACY_PM_SUPPORT */
#endif /* CONFIG_PM */

/*
 * __ixgbe_shutdown is not used when power management
 * is disabled on older kernels (<2.6.12). causes a compile
 * warning/error, because it is defined and not used.
 */
#if defined(CONFIG_PM) || !defined(USE_REBOOT_NOTIFIER)
static int __ixgbe_shutdown(struct pci_dev *pdev, bool *enable_wake)
{
	struct ixgbe_adapter *adapter = pci_get_drvdata(pdev);
	struct net_device *netdev = adapter->netdev;
	struct ixgbe_hw *hw = &adapter->hw;
	u32 ctrl;
	u32 wufc = adapter->wol;
#ifdef CONFIG_PM
	int retval = 0;
#endif

	rtnl_lock();
	netif_device_detach(netdev);

	if (netif_running(netdev))
		ixgbe_close_suspend(adapter);

	ixgbe_clear_interrupt_scheme(adapter);
	rtnl_unlock();

#ifdef CONFIG_PM
	retval = pci_save_state(pdev);
	if (retval)
		return retval;

#endif

	/* this won't stop link of managebility or WoL is enabled */
	if (hw->mac.type == ixgbe_mac_82599EB)
		ixgbe_stop_mac_link_on_d3_82599(hw);

	if (wufc) {
		u32 fctrl;

		ixgbe_set_rx_mode(netdev);

		/* enable the optics for 82599 SFP+ fiber as we can WoL */
		if (hw->mac.ops.enable_tx_laser)
			hw->mac.ops.enable_tx_laser(hw);

		/* enable the reception of multicast packets */
		fctrl = IXGBE_READ_REG(hw, IXGBE_FCTRL);
		fctrl |= IXGBE_FCTRL_MPE;
		IXGBE_WRITE_REG(hw, IXGBE_FCTRL, fctrl);

		ctrl = IXGBE_READ_REG(hw, IXGBE_CTRL);
		ctrl |= IXGBE_CTRL_GIO_DIS;
		IXGBE_WRITE_REG(hw, IXGBE_CTRL, ctrl);

		IXGBE_WRITE_REG(hw, IXGBE_WUFC, wufc);
	} else {
		IXGBE_WRITE_REG(hw, IXGBE_WUC, 0);
		IXGBE_WRITE_REG(hw, IXGBE_WUFC, 0);
	}

	switch (hw->mac.type) {
	case ixgbe_mac_82598EB:
		pci_wake_from_d3(pdev, false);
		break;
	case ixgbe_mac_82599EB:
	case ixgbe_mac_X540:
	case ixgbe_mac_X550:
	case ixgbe_mac_X550EM_x:
	case ixgbe_mac_X550EM_a:
		pci_wake_from_d3(pdev, !!wufc);
		break;
	default:
		break;
	}

	*enable_wake = !!wufc;
	if (!*enable_wake)
		ixgbe_set_phy_power(hw, false);

	ixgbe_release_hw_control(adapter);

	if (!test_and_set_bit(__IXGBE_DISABLED, &adapter->state))
		pci_disable_device(pdev);

	return 0;
}
#endif /* defined(CONFIG_PM) || !defined(USE_REBOOT_NOTIFIER) */

#ifdef CONFIG_PM
#ifndef USE_LEGACY_PM_SUPPORT
static int ixgbe_suspend(struct device *dev)
#else
static int ixgbe_suspend(struct pci_dev *pdev,
			 pm_message_t __always_unused state)
#endif /* USE_LEGACY_PM_SUPPORT */
{
	int retval;
	bool wake;
#ifndef USE_LEGACY_PM_SUPPORT
	struct pci_dev *pdev = to_pci_dev(dev);
#endif

	retval = __ixgbe_shutdown(pdev, &wake);
	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;
}
#endif /* CONFIG_PM */

#ifndef USE_REBOOT_NOTIFIER
static void ixgbe_shutdown(struct pci_dev *pdev)
{
	bool wake;

	__ixgbe_shutdown(pdev, &wake);

	if (system_state == SYSTEM_POWER_OFF) {
		pci_wake_from_d3(pdev, wake);
		pci_set_power_state(pdev, PCI_D3hot);
	}
}

#endif
#ifdef HAVE_NDO_GET_STATS64
/**
 * ixgbe_get_stats64 - Get System Network Statistics
 * @netdev: network interface device structure
 * @stats: storage space for 64bit statistics
 *
 * Returns 64bit statistics, for use in the ndo_get_stats64 callback. This
 * function replaces ixgbe_get_stats for kernels which support it.
 */
#ifdef HAVE_VOID_NDO_GET_STATS64
static void ixgbe_get_stats64(struct net_device *netdev,
			      struct rtnl_link_stats64 *stats)
#else
static struct rtnl_link_stats64 *ixgbe_get_stats64(struct net_device *netdev,
						   struct rtnl_link_stats64 *stats)
#endif
{
	struct ixgbe_adapter *adapter = netdev_priv(netdev);
	int i;

	rcu_read_lock();
	for (i = 0; i < adapter->num_rx_queues; i++) {
		struct ixgbe_ring *ring = READ_ONCE(adapter->rx_ring[i]);
		u64 bytes, packets;
		unsigned int start;

		if (ring) {
			do {
				start = u64_stats_fetch_begin_irq(&ring->syncp);
				packets = ring->stats.packets;
				bytes   = ring->stats.bytes;
			} while (u64_stats_fetch_retry_irq(&ring->syncp, start));
			stats->rx_packets += packets;
			stats->rx_bytes   += bytes;
		}
	}

	for (i = 0; i < adapter->num_tx_queues; i++) {
		struct ixgbe_ring *ring = READ_ONCE(adapter->tx_ring[i]);
		u64 bytes, packets;
		unsigned int start;

		if (ring) {
			do {
				start = u64_stats_fetch_begin_irq(&ring->syncp);
				packets = ring->stats.packets;
				bytes   = ring->stats.bytes;
			} while (u64_stats_fetch_retry_irq(&ring->syncp, start));
			stats->tx_packets += packets;
			stats->tx_bytes   += bytes;
		}
	}
	rcu_read_unlock();
	/* following stats updated by ixgbe_watchdog_task() */
	stats->multicast	= netdev->stats.multicast;
	stats->rx_errors	= netdev->stats.rx_errors;
	stats->rx_length_errors	= netdev->stats.rx_length_errors;
	stats->rx_crc_errors	= netdev->stats.rx_crc_errors;
	stats->rx_missed_errors	= netdev->stats.rx_missed_errors;
#ifndef HAVE_VOID_NDO_GET_STATS64
	return stats;
#endif
}
#else
/**
 * ixgbe_get_stats - Get System Network Statistics
 * @netdev: network interface device structure
 *
 * Returns the address of the device statistics structure.
 * The statistics are actually updated from the timer callback.
 **/
static struct net_device_stats *ixgbe_get_stats(struct net_device *netdev)
{
	struct ixgbe_adapter *adapter = netdev_priv(netdev);

	/* update the stats data */
	ixgbe_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 */
}
#endif
/**
 * ixgbe_update_stats - Update the board statistics counters.
 * @adapter: board private structure
 **/
void ixgbe_update_stats(struct ixgbe_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 ixgbe_hw *hw = &adapter->hw;
	struct ixgbe_hw_stats *hwstats = &adapter->stats;
	u64 total_mpc = 0;
	u32 i, missed_rx = 0, mpc, bprc, lxon, lxoff, xon_off_tot;
	u64 non_eop_descs = 0, restart_queue = 0, tx_busy = 0;
	u64 alloc_rx_page_failed = 0, alloc_rx_buff_failed = 0;
	u64 bytes = 0, packets = 0, hw_csum_rx_error = 0;

	if (test_bit(__IXGBE_DOWN, &adapter->state) ||
	    test_bit(__IXGBE_RESETTING, &adapter->state))
		return;

	if (adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED) {
		u64 rsc_count = 0;
		u64 rsc_flush = 0;
		for (i = 0; i < adapter->num_rx_queues; i++) {
			rsc_count += adapter->rx_ring[i]->rx_stats.rsc_count;
			rsc_flush += adapter->rx_ring[i]->rx_stats.rsc_flush;
		}
		adapter->rsc_total_count = rsc_count;
		adapter->rsc_total_flush = rsc_flush;
	}

	for (i = 0; i < adapter->num_rx_queues; i++) {
		struct ixgbe_ring *rx_ring = adapter->rx_ring[i];
		non_eop_descs += rx_ring->rx_stats.non_eop_descs;
		alloc_rx_page_failed += rx_ring->rx_stats.alloc_rx_page_failed;
		alloc_rx_buff_failed += rx_ring->rx_stats.alloc_rx_buff_failed;
		hw_csum_rx_error += rx_ring->rx_stats.csum_err;
		bytes += rx_ring->stats.bytes;
		packets += rx_ring->stats.packets;

	}
	adapter->non_eop_descs = non_eop_descs;
	adapter->alloc_rx_page_failed = alloc_rx_page_failed;
	adapter->alloc_rx_buff_failed = alloc_rx_buff_failed;
	adapter->hw_csum_rx_error = hw_csum_rx_error;
	net_stats->rx_bytes = bytes;
	net_stats->rx_packets = packets;

	bytes = 0;
	packets = 0;
	/* gather some stats to the adapter struct that are per queue */
	for (i = 0; i < adapter->num_tx_queues; i++) {
		struct ixgbe_ring *tx_ring = adapter->tx_ring[i];
		restart_queue += tx_ring->tx_stats.restart_queue;
		tx_busy += tx_ring->tx_stats.tx_busy;
		bytes += tx_ring->stats.bytes;
		packets += tx_ring->stats.packets;
	}
	adapter->restart_queue = restart_queue;
	adapter->tx_busy = tx_busy;
	net_stats->tx_bytes = bytes;
	net_stats->tx_packets = packets;

	hwstats->crcerrs += IXGBE_READ_REG(hw, IXGBE_CRCERRS);

	/* 8 register reads */
	for (i = 0; i < 8; i++) {
		/* for packet buffers not used, the register should read 0 */
		mpc = IXGBE_READ_REG(hw, IXGBE_MPC(i));
		missed_rx += mpc;
		hwstats->mpc[i] += mpc;
		total_mpc += hwstats->mpc[i];
		hwstats->pxontxc[i] += IXGBE_READ_REG(hw, IXGBE_PXONTXC(i));
		hwstats->pxofftxc[i] += IXGBE_READ_REG(hw, IXGBE_PXOFFTXC(i));
		switch (hw->mac.type) {
		case ixgbe_mac_82598EB:
			hwstats->rnbc[i] += IXGBE_READ_REG(hw, IXGBE_RNBC(i));
			hwstats->qbtc[i] += IXGBE_READ_REG(hw, IXGBE_QBTC(i));
			hwstats->qbrc[i] += IXGBE_READ_REG(hw, IXGBE_QBRC(i));
			hwstats->pxonrxc[i] +=
				IXGBE_READ_REG(hw, IXGBE_PXONRXC(i));
			break;
		case ixgbe_mac_82599EB:
		case ixgbe_mac_X540:
		case ixgbe_mac_X550:
		case ixgbe_mac_X550EM_x:
		case ixgbe_mac_X550EM_a:
			hwstats->pxonrxc[i] +=
				IXGBE_READ_REG(hw, IXGBE_PXONRXCNT(i));
			break;
		default:
			break;
		}
	}

	/*16 register reads */
	for (i = 0; i < 16; i++) {
		hwstats->qptc[i] += IXGBE_READ_REG(hw, IXGBE_QPTC(i));
		hwstats->qprc[i] += IXGBE_READ_REG(hw, IXGBE_QPRC(i));
		if ((hw->mac.type == ixgbe_mac_82599EB) ||
		    (hw->mac.type == ixgbe_mac_X550) ||
		    (hw->mac.type == ixgbe_mac_X550EM_x) ||
		    (hw->mac.type == ixgbe_mac_X550EM_a) ||
		    (hw->mac.type == ixgbe_mac_X540)) {
			hwstats->qbtc[i] += IXGBE_READ_REG(hw, IXGBE_QBTC_L(i));
			IXGBE_READ_REG(hw, IXGBE_QBTC_H(i)); /* to clear */
			hwstats->qbrc[i] += IXGBE_READ_REG(hw, IXGBE_QBRC_L(i));
			IXGBE_READ_REG(hw, IXGBE_QBRC_H(i)); /* to clear */
		}
	}

	hwstats->gprc += IXGBE_READ_REG(hw, IXGBE_GPRC);
	/* work around hardware counting issue */
	hwstats->gprc -= missed_rx;

	ixgbe_update_xoff_received(adapter);

	/* 82598 hardware only has a 32 bit counter in the high register */
	switch (hw->mac.type) {
	case ixgbe_mac_82598EB:
		hwstats->lxonrxc += IXGBE_READ_REG(hw, IXGBE_LXONRXC);
		hwstats->gorc += IXGBE_READ_REG(hw, IXGBE_GORCH);
		hwstats->gotc += IXGBE_READ_REG(hw, IXGBE_GOTCH);
		hwstats->tor += IXGBE_READ_REG(hw, IXGBE_TORH);
		break;
	case ixgbe_mac_X540:
	case ixgbe_mac_X550:
	case ixgbe_mac_X550EM_x:
	case ixgbe_mac_X550EM_a:
		/* OS2BMC stats are X540 only*/
		hwstats->o2bgptc += IXGBE_READ_REG(hw, IXGBE_O2BGPTC);
		hwstats->o2bspc += IXGBE_READ_REG(hw, IXGBE_O2BSPC);
		hwstats->b2ospc += IXGBE_READ_REG(hw, IXGBE_B2OSPC);
		hwstats->b2ogprc += IXGBE_READ_REG(hw, IXGBE_B2OGPRC);
		/* fall through */
	case ixgbe_mac_82599EB:
		for (i = 0; i < 16; i++)
			adapter->hw_rx_no_dma_resources +=
					     IXGBE_READ_REG(hw, IXGBE_QPRDC(i));
		hwstats->gorc += IXGBE_READ_REG(hw, IXGBE_GORCL);
		IXGBE_READ_REG(hw, IXGBE_GORCH); /* to clear */
		hwstats->gotc += IXGBE_READ_REG(hw, IXGBE_GOTCL);
		IXGBE_READ_REG(hw, IXGBE_GOTCH); /* to clear */
		hwstats->tor += IXGBE_READ_REG(hw, IXGBE_TORL);
		IXGBE_READ_REG(hw, IXGBE_TORH); /* to clear */
		hwstats->lxonrxc += IXGBE_READ_REG(hw, IXGBE_LXONRXCNT);
#ifdef HAVE_TX_MQ
		hwstats->fdirmatch += IXGBE_READ_REG(hw, IXGBE_FDIRMATCH);
		hwstats->fdirmiss += IXGBE_READ_REG(hw, IXGBE_FDIRMISS);
#endif /* HAVE_TX_MQ */
#if IS_ENABLED(CONFIG_FCOE)
		hwstats->fccrc += IXGBE_READ_REG(hw, IXGBE_FCCRC);
		hwstats->fclast += IXGBE_READ_REG(hw, IXGBE_FCLAST);
		hwstats->fcoerpdc += IXGBE_READ_REG(hw, IXGBE_FCOERPDC);
		hwstats->fcoeprc += IXGBE_READ_REG(hw, IXGBE_FCOEPRC);
		hwstats->fcoeptc += IXGBE_READ_REG(hw, IXGBE_FCOEPTC);
		hwstats->fcoedwrc += IXGBE_READ_REG(hw, IXGBE_FCOEDWRC);
		hwstats->fcoedwtc += IXGBE_READ_REG(hw, IXGBE_FCOEDWTC);
		/* Add up per cpu counters for total ddp alloc fail */
		if (adapter->fcoe.ddp_pool) {
			struct ixgbe_fcoe *fcoe = &adapter->fcoe;
			struct ixgbe_fcoe_ddp_pool *ddp_pool;
			unsigned int cpu;
			u64 noddp = 0, noddp_ext_buff = 0;
			for_each_possible_cpu(cpu) {
				ddp_pool = per_cpu_ptr(fcoe->ddp_pool, cpu);
				noddp += ddp_pool->noddp;
				noddp_ext_buff += ddp_pool->noddp_ext_buff;
			}
			hwstats->fcoe_noddp = noddp;
			hwstats->fcoe_noddp_ext_buff = noddp_ext_buff;
		}

#endif /* CONFIG_FCOE */
		break;
	default:
		break;
	}
	bprc = IXGBE_READ_REG(hw, IXGBE_BPRC);
	hwstats->bprc += bprc;
	hwstats->mprc += IXGBE_READ_REG(hw, IXGBE_MPRC);
	if (hw->mac.type == ixgbe_mac_82598EB)
		hwstats->mprc -= bprc;
	hwstats->roc += IXGBE_READ_REG(hw, IXGBE_ROC);
	hwstats->prc64 += IXGBE_READ_REG(hw, IXGBE_PRC64);
	hwstats->prc127 += IXGBE_READ_REG(hw, IXGBE_PRC127);
	hwstats->prc255 += IXGBE_READ_REG(hw, IXGBE_PRC255);
	hwstats->prc511 += IXGBE_READ_REG(hw, IXGBE_PRC511);
	hwstats->prc1023 += IXGBE_READ_REG(hw, IXGBE_PRC1023);
	hwstats->prc1522 += IXGBE_READ_REG(hw, IXGBE_PRC1522);
	hwstats->rlec += IXGBE_READ_REG(hw, IXGBE_RLEC);
	lxon = IXGBE_READ_REG(hw, IXGBE_LXONTXC);
	hwstats->lxontxc += lxon;
	lxoff = IXGBE_READ_REG(hw, IXGBE_LXOFFTXC);
	hwstats->lxofftxc += lxoff;
	hwstats->gptc += IXGBE_READ_REG(hw, IXGBE_GPTC);
	hwstats->mptc += IXGBE_READ_REG(hw, IXGBE_MPTC);
	/*
	 * 82598 errata - tx of flow control packets is included in tx counters
	 */
	xon_off_tot = lxon + lxoff;
	hwstats->gptc -= xon_off_tot;
	hwstats->mptc -= xon_off_tot;
	hwstats->gotc -= (xon_off_tot * (ETH_ZLEN + ETH_FCS_LEN));
	hwstats->ruc += IXGBE_READ_REG(hw, IXGBE_RUC);
	hwstats->rfc += IXGBE_READ_REG(hw, IXGBE_RFC);
	hwstats->rjc += IXGBE_READ_REG(hw, IXGBE_RJC);
	hwstats->tpr += IXGBE_READ_REG(hw, IXGBE_TPR);
	hwstats->ptc64 += IXGBE_READ_REG(hw, IXGBE_PTC64);
	hwstats->ptc64 -= xon_off_tot;
	hwstats->ptc127 += IXGBE_READ_REG(hw, IXGBE_PTC127);
	hwstats->ptc255 += IXGBE_READ_REG(hw, IXGBE_PTC255);
	hwstats->ptc511 += IXGBE_READ_REG(hw, IXGBE_PTC511);
	hwstats->ptc1023 += IXGBE_READ_REG(hw, IXGBE_PTC1023);
	hwstats->ptc1522 += IXGBE_READ_REG(hw, IXGBE_PTC1522);
	hwstats->bptc += IXGBE_READ_REG(hw, IXGBE_BPTC);
	/* Fill out the OS statistics structure */
	net_stats->multicast = hwstats->mprc;

	/* Rx Errors */
	net_stats->rx_errors = hwstats->crcerrs +
				       hwstats->rlec;
	net_stats->rx_dropped = 0;
	net_stats->rx_length_errors = hwstats->rlec;
	net_stats->rx_crc_errors = hwstats->crcerrs;
	net_stats->rx_missed_errors = total_mpc;

	/*
	 * VF Stats Collection - skip while resetting because these
	 * are not clear on read and otherwise you'll sometimes get
	 * crazy values.
	 */
	if (!test_bit(__IXGBE_RESETTING, &adapter->state)) {
		for (i = 0; i < adapter->num_vfs; i++) {
			UPDATE_VF_COUNTER_32bit(IXGBE_PVFGPRC(i),	      \
					adapter->vfinfo[i].last_vfstats.gprc, \
					adapter->vfinfo[i].vfstats.gprc);
			UPDATE_VF_COUNTER_32bit(IXGBE_PVFGPTC(i),	      \
					adapter->vfinfo[i].last_vfstats.gptc, \
					adapter->vfinfo[i].vfstats.gptc);
			UPDATE_VF_COUNTER_36bit(IXGBE_PVFGORC_LSB(i),	      \
					IXGBE_PVFGORC_MSB(i),		      \
					adapter->vfinfo[i].last_vfstats.gorc, \
					adapter->vfinfo[i].vfstats.gorc);
			UPDATE_VF_COUNTER_36bit(IXGBE_PVFGOTC_LSB(i),	      \
					IXGBE_PVFGOTC_MSB(i),		      \
					adapter->vfinfo[i].last_vfstats.gotc, \
					adapter->vfinfo[i].vfstats.gotc);
			UPDATE_VF_COUNTER_32bit(IXGBE_PVFMPRC(i),	      \
					adapter->vfinfo[i].last_vfstats.mprc, \
					adapter->vfinfo[i].vfstats.mprc);
		}
	}
}

#ifdef HAVE_TX_MQ
/**
 * ixgbe_fdir_reinit_subtask - worker thread to reinit FDIR filter table
 * @adapter - pointer to the device adapter structure
 **/
static void ixgbe_fdir_reinit_subtask(struct ixgbe_adapter *adapter)
{
	struct ixgbe_hw *hw = &adapter->hw;
	int i;

	if (!(adapter->flags2 & IXGBE_FLAG2_FDIR_REQUIRES_REINIT))
		return;

	adapter->flags2 &= ~IXGBE_FLAG2_FDIR_REQUIRES_REINIT;

	/* if interface is down do nothing */
	if (test_bit(__IXGBE_DOWN, &adapter->state))
		return;

	/* do nothing if we are not using signature filters */
	if (!(adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE))
		return;

	adapter->fdir_overflow++;

	if (ixgbe_reinit_fdir_tables_82599(hw) == IXGBE_SUCCESS) {
		for (i = 0; i < adapter->num_tx_queues; i++)
			set_bit(__IXGBE_TX_FDIR_INIT_DONE,
				&(adapter->tx_ring[i]->state));
		/* re-enable flow director interrupts */
		IXGBE_WRITE_REG(hw, IXGBE_EIMS, IXGBE_EIMS_FLOW_DIR);
	} else {
		e_err(probe, "failed to finish FDIR re-initialization, "
		      "ignored adding FDIR ATR filters\n");
	}
}

#endif /* HAVE_TX_MQ */
/**
 * ixgbe_check_hang_subtask - check for hung queues and dropped interrupts
 * @adapter - pointer to the device adapter structure
 *
 * This function serves two purposes.  First it strobes the interrupt lines
 * in order to make certain interrupts are occurring.  Secondly it sets the
 * bits needed to check for TX hangs.  As a result we should immediately
 * determine if a hang has occurred.
 */
static void ixgbe_check_hang_subtask(struct ixgbe_adapter *adapter)
{
	struct ixgbe_hw *hw = &adapter->hw;
	u64 eics = 0;
	int i;

	/* If we're down or resetting, just bail */
	if (test_bit(__IXGBE_DOWN, &adapter->state) ||
	    test_bit(__IXGBE_REMOVE, &adapter->state) ||
	    test_bit(__IXGBE_RESETTING, &adapter->state))
		return;

	/* Force detection of hung controller */
	if (netif_carrier_ok(adapter->netdev)) {
		for (i = 0; i < adapter->num_tx_queues; i++)
			set_check_for_tx_hang(adapter->tx_ring[i]);
	}

	if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED)) {
		/*
		 * for legacy and MSI interrupts don't set any bits
		 * that are enabled for EIAM, because this operation
		 * would set *both* EIMS and EICS for any bit in EIAM
		 */
		IXGBE_WRITE_REG(hw, IXGBE_EICS,
			(IXGBE_EICS_TCP_TIMER | IXGBE_EICS_OTHER));
	} else {
		/* get one bit for every active tx/rx interrupt vector */
		for (i = 0; i < adapter->num_q_vectors; i++) {
			struct ixgbe_q_vector *qv = adapter->q_vector[i];
			if (qv->rx.ring || qv->tx.ring)
				eics |= ((u64)1 << i);
		}
	}

	/* Cause software interrupt to ensure rings are cleaned */
	ixgbe_irq_rearm_queues(adapter, eics);
}

/**
 * ixgbe_watchdog_update_link - update the link status
 * @adapter - pointer to the device adapter structure
 * @link_speed - pointer to a u32 to store the link_speed
 **/
static void ixgbe_watchdog_update_link(struct ixgbe_adapter *adapter)
{
	struct ixgbe_hw *hw = &adapter->hw;
	u32 link_speed = adapter->link_speed;
	bool link_up = adapter->link_up;
	bool pfc_en = adapter->dcb_cfg.pfc_mode_enable;

	if (!(adapter->flags & IXGBE_FLAG_NEED_LINK_UPDATE))
		return;

	if (hw->mac.ops.check_link) {
		hw->mac.ops.check_link(hw, &link_speed, &link_up, false);
	} else {
		/* always assume link is up, if no check link function */
		link_speed = IXGBE_LINK_SPEED_10GB_FULL;
		link_up = true;
	}

	/* If Crosstalk fix enabled do the sanity check of making sure
	 * the SFP+ cage is empty.
	 */
	if (adapter->need_crosstalk_fix) {
		u32 sfp_cage_full;

		switch (hw->mac.type) {
		case ixgbe_mac_82599EB:
			sfp_cage_full = IXGBE_READ_REG(hw, IXGBE_ESDP) &
					IXGBE_ESDP_SDP2;
			break;
		case ixgbe_mac_X550EM_x:
		case ixgbe_mac_X550EM_a:
			sfp_cage_full = IXGBE_READ_REG(hw, IXGBE_ESDP) &
					IXGBE_ESDP_SDP0;
			break;
		default:
			/* Non-SFP+ system - sanity check */
			sfp_cage_full = false;
			break;
		}

		if (ixgbe_is_sfp(hw) && link_up && !sfp_cage_full)
			link_up = false;
	}

#ifdef HAVE_DCBNL_IEEE
	if (adapter->ixgbe_ieee_pfc)
		pfc_en |= !!(adapter->ixgbe_ieee_pfc->pfc_en);

#endif
	if (link_up && !((adapter->flags & IXGBE_FLAG_DCB_ENABLED) && pfc_en)) {
		hw->mac.ops.fc_enable(hw);
		ixgbe_set_rx_drop_en(adapter);
	}

	if (link_up ||
	    time_after(jiffies, (adapter->link_check_timeout +
				 IXGBE_TRY_LINK_TIMEOUT))) {
		adapter->flags &= ~IXGBE_FLAG_NEED_LINK_UPDATE;
		IXGBE_WRITE_REG(hw, IXGBE_EIMS, IXGBE_EIMC_LSC);
		IXGBE_WRITE_FLUSH(hw);
	}

	adapter->link_up = link_up;
	adapter->link_speed = link_speed;
	if (hw->mac.ops.dmac_config && hw->mac.dmac_config.watchdog_timer) {
		u8 num_tcs = netdev_get_num_tc(adapter->netdev);
#if IS_ENABLED(CONFIG_FCOE)
		u8 fcoe_tc = ixgbe_fcoe_get_tc(adapter);
		bool fcoe_en = !!(adapter->flags & IXGBE_FLAG_FCOE_ENABLED);
#endif /* CONFIG_FCOE */

		if (hw->mac.dmac_config.link_speed != link_speed ||
#if IS_ENABLED(CONFIG_FCOE)
		    hw->mac.dmac_config.fcoe_tc != fcoe_tc ||
		    hw->mac.dmac_config.fcoe_en != fcoe_en ||
#endif /* CONFIG_FCOE */
		    hw->mac.dmac_config.num_tcs != num_tcs) {
			hw->mac.dmac_config.link_speed = link_speed;
			hw->mac.dmac_config.num_tcs = num_tcs;
#if IS_ENABLED(CONFIG_FCOE)
			hw->mac.dmac_config.fcoe_en = fcoe_en;
			hw->mac.dmac_config.fcoe_tc = fcoe_tc;
#endif /* CONFIG_FCOE */
			hw->mac.ops.dmac_config(hw);
		}
	}
}

static void ixgbe_update_default_up(struct ixgbe_adapter *adapter)
{
	u8 up = 0;
#ifdef HAVE_DCBNL_IEEE
	struct net_device *netdev = adapter->netdev;
	struct dcb_app app = {
			      .selector = DCB_APP_IDTYPE_ETHTYPE,
			      .protocol = 0,
			     };
	up = dcb_getapp(netdev, &app);
#endif

#if IS_ENABLED(CONFIG_FCOE)
	adapter->default_up = (up > 1) ? (ffs(up) - 1) : 0;
#else
	adapter->default_up = up;
#endif
}

/**
 * ixgbe_watchdog_link_is_up - update netif_carrier status and
 *                             print link up message
 * @adapter - pointer to the device adapter structure
 **/
static void ixgbe_watchdog_link_is_up(struct ixgbe_adapter *adapter)
{
	struct net_device *netdev = adapter->netdev;
	struct ixgbe_hw *hw = &adapter->hw;
	u32 link_speed = adapter->link_speed;
	const char *speed_str;
	bool flow_rx, flow_tx;

	/* only continue if link was previously down */
	if (netif_carrier_ok(netdev))
		return;

	adapter->flags2 &= ~IXGBE_FLAG2_SEARCH_FOR_SFP;

	switch (hw->mac.type) {
	case ixgbe_mac_82598EB: {
		u32 frctl = IXGBE_READ_REG(hw, IXGBE_FCTRL);
		u32 rmcs = IXGBE_READ_REG(hw, IXGBE_RMCS);
		flow_rx = !!(frctl & IXGBE_FCTRL_RFCE);
		flow_tx = !!(rmcs & IXGBE_RMCS_TFCE_802_3X);
	}
		break;
	case ixgbe_mac_X550:
	case ixgbe_mac_X550EM_x:
	case ixgbe_mac_X550EM_a:
	case ixgbe_mac_82599EB:
	case ixgbe_mac_X540: {
		u32 mflcn = IXGBE_READ_REG(hw, IXGBE_MFLCN);
		u32 fccfg = IXGBE_READ_REG(hw, IXGBE_FCCFG);
		flow_rx = !!(mflcn & IXGBE_MFLCN_RFCE);
		flow_tx = !!(fccfg & IXGBE_FCCFG_TFCE_802_3X);
	}
		break;
	default:
		flow_tx = false;
		flow_rx = false;
		break;
	}

#ifdef HAVE_PTP_1588_CLOCK
	adapter->last_rx_ptp_check = jiffies;

	if (test_bit(__IXGBE_PTP_RUNNING, &adapter->state))
		ixgbe_ptp_start_cyclecounter(adapter);

#endif
	switch (link_speed) {
	case IXGBE_LINK_SPEED_10GB_FULL:
		speed_str = "10 Gbps";
		break;
	case IXGBE_LINK_SPEED_5GB_FULL:
		speed_str = "5 Gbps";
		break;
	case IXGBE_LINK_SPEED_2_5GB_FULL:
		speed_str = "2.5 Gbps";
		break;
	case IXGBE_LINK_SPEED_1GB_FULL:
		speed_str = "1 Gbps";
		break;
	case IXGBE_LINK_SPEED_100_FULL:
		speed_str = "100 Mbps";
		break;
	case IXGBE_LINK_SPEED_10_FULL:
		speed_str = "10 Mbps";
		break;
	default:
		speed_str = "unknown speed";
		break;
	}
	e_info(drv, "NIC Link is Up %s, Flow Control: %s\n", speed_str,
	       ((flow_rx && flow_tx) ? "RX/TX" :
	       (flow_rx ? "RX" :
	       (flow_tx ? "TX" : "None"))));

	netif_carrier_on(netdev);
#ifdef IFLA_VF_MAX
	ixgbe_check_vf_rate_limit(adapter);
#endif /* IFLA_VF_MAX */
	/* Turn on malicious driver detection */
	if ((adapter->num_vfs) && (hw->mac.ops.enable_mdd) &&
		(adapter->flags & IXGBE_FLAG_MDD_ENABLED))
		hw->mac.ops.enable_mdd(hw);

	netif_tx_wake_all_queues(netdev);

	/* update the default user priority for VFs */
	ixgbe_update_default_up(adapter);

	/* ping all the active vfs to let them know link has changed */
	ixgbe_ping_all_vfs(adapter);
}

/**
 * ixgbe_watchdog_link_is_down - update netif_carrier status and
 *                               print link down message
 * @adapter - pointer to the adapter structure
 **/
static void ixgbe_watchdog_link_is_down(struct ixgbe_adapter *adapter)
{
	struct net_device *netdev = adapter->netdev;
	struct ixgbe_hw *hw = &adapter->hw;

	adapter->link_up = false;
	adapter->link_speed = 0;

	/* only continue if link was up previously */
	if (!netif_carrier_ok(netdev))
		return;

	/* poll for SFP+ cable when link is down */
	if (ixgbe_is_sfp(hw) && hw->mac.type == ixgbe_mac_82598EB)
		adapter->flags2 |= IXGBE_FLAG2_SEARCH_FOR_SFP;

#ifdef HAVE_PTP_1588_CLOCK
	if (test_bit(__IXGBE_PTP_RUNNING, &adapter->state))
		ixgbe_ptp_start_cyclecounter(adapter);

#endif
	e_info(drv, "NIC Link is Down\n");
	netif_carrier_off(netdev);
	netif_tx_stop_all_queues(netdev);

	/* ping all the active vfs to let them know link has changed */
	ixgbe_ping_all_vfs(adapter);
}

static bool ixgbe_ring_tx_pending(struct ixgbe_adapter *adapter)
{
	int i;

	for (i = 0; i < adapter->num_tx_queues; i++) {
		struct ixgbe_ring *tx_ring = adapter->tx_ring[i];

		if (tx_ring->next_to_use != tx_ring->next_to_clean)
			return true;
	}

	return false;
}

static bool ixgbe_vf_tx_pending(struct ixgbe_adapter *adapter)
{
	struct ixgbe_hw *hw = &adapter->hw;
	struct ixgbe_ring_feature *vmdq = &adapter->ring_feature[RING_F_VMDQ];
	u32 q_per_pool = __ALIGN_MASK(1, ~vmdq->mask);

	int i, j;

	if (!adapter->num_vfs)
		return false;

	/* resetting the PF is only needed for MACs < X550 */
	if (hw->mac.type >= ixgbe_mac_X550)
		return false;
	for (i = 0; i < adapter->num_vfs; i++) {
		for (j = 0; j < q_per_pool; j++) {
			u32 h, t;

			h = IXGBE_READ_REG(hw, IXGBE_PVFTDHn(q_per_pool, i, j));
			t = IXGBE_READ_REG(hw, IXGBE_PVFTDTn(q_per_pool, i, j));

			if (h != t)
				return true;
		}
	}

	return false;
}

/**
 * ixgbe_watchdog_flush_tx - flush queues on link down
 * @adapter - pointer to the device adapter structure
 **/
static void ixgbe_watchdog_flush_tx(struct ixgbe_adapter *adapter)
{
	if (!netif_carrier_ok(adapter->netdev)) {
		if (ixgbe_ring_tx_pending(adapter) ||
		    ixgbe_vf_tx_pending(adapter)) {
			/* 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).
			 */
			e_warn(drv, "initiating reset due to lost link with pending Tx work\n");
			set_bit(__IXGBE_RESET_REQUESTED, &adapter->state);
		}
	}
}

#ifdef CONFIG_PCI_IOV
static inline void ixgbe_issue_vf_flr(struct ixgbe_adapter *adapter,
				      struct pci_dev *vfdev)
{
	int pos, i;
	u16 status;

	/* wait for pending transactions on the bus */
	for (i = 0; i < 4; i++) {
		if (i)
			msleep((1 << (i - 1)) * 100);

		pcie_capability_read_word(vfdev, PCI_EXP_DEVSTA, &status);
		if (!(status & PCI_EXP_DEVSTA_TRPND))
			goto clear;
	}

	e_dev_warn("Issuing VFLR with pending transactions\n");

clear:
	pos = pci_find_capability(vfdev, PCI_CAP_ID_EXP);
	if (!pos)
		return;

	e_dev_err("Issuing VFLR for VF %s\n", pci_name(vfdev));
	pci_write_config_word(vfdev, pos + PCI_EXP_DEVCTL,
			      PCI_EXP_DEVCTL_BCR_FLR);
	msleep(100);
}

static void ixgbe_check_for_bad_vf(struct ixgbe_adapter *adapter)
{
	struct ixgbe_hw *hw = &adapter->hw;
	struct pci_dev *pdev = adapter->pdev;
	unsigned int vf;
	u32 gpc;

	if (!(netif_carrier_ok(adapter->netdev)))
		return;

	gpc = IXGBE_READ_REG(hw, IXGBE_TXDGPC);
	if (gpc) /* If incrementing then no need for the check below */
		return;
	/*
	 * 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.
	 */

	if (!pdev)
		return;

	/* check status reg for all VFs owned by this PF */
	for (vf = 0; vf < adapter->num_vfs; ++vf) {
		struct pci_dev *vfdev = adapter->vfinfo[vf].vfdev;
		u16 status_reg;

		if (!vfdev)
			continue;
		pci_read_config_word(vfdev, PCI_STATUS, &status_reg);
		if (status_reg != IXGBE_FAILED_READ_CFG_WORD &&
		    status_reg & PCI_STATUS_REC_MASTER_ABORT)
			ixgbe_issue_vf_flr(adapter, vfdev);
	}
}

static void ixgbe_spoof_check(struct ixgbe_adapter *adapter)
{
	u32 ssvpc;

	/* Do not perform spoof check for 82598 or if not in IOV mode */
	if (adapter->hw.mac.type == ixgbe_mac_82598EB ||
	    adapter->num_vfs == 0)
		return;

	ssvpc = IXGBE_READ_REG(&adapter->hw, IXGBE_SSVPC);

	/*
	 * ssvpc register is cleared on read, if zero then no
	 * spoofed packets in the last interval.
	 */
	if (!ssvpc)
		return;

	e_warn(drv, "%d Spoofed packets detected\n", ssvpc);
}

#endif /* CONFIG_PCI_IOV */

/**
 * ixgbe_watchdog_subtask - check and bring link up
 * @adapter - pointer to the device adapter structure
 **/
static void ixgbe_watchdog_subtask(struct ixgbe_adapter *adapter)
{
	/* if interface is down do nothing */
	if (test_bit(__IXGBE_DOWN, &adapter->state) ||
	    test_bit(__IXGBE_REMOVE, &adapter->state) ||
	    test_bit(__IXGBE_RESETTING, &adapter->state))
		return;

	ixgbe_watchdog_update_link(adapter);

	if (adapter->link_up)
		ixgbe_watchdog_link_is_up(adapter);
	else
		ixgbe_watchdog_link_is_down(adapter);
#ifdef CONFIG_PCI_IOV
	ixgbe_spoof_check(adapter);
	ixgbe_check_for_bad_vf(adapter);
#endif /* CONFIG_PCI_IOV */
	ixgbe_update_stats(adapter);

	ixgbe_watchdog_flush_tx(adapter);
}

/**
 * ixgbe_sfp_detection_subtask - poll for SFP+ cable
 * @adapter - the ixgbe adapter structure
 **/
static void ixgbe_sfp_detection_subtask(struct ixgbe_adapter *adapter)
{
	struct ixgbe_hw *hw = &adapter->hw;
	s32 err;

	/* If crosstalk fix enabled verify the SFP+ cage is full */
	if (adapter->need_crosstalk_fix) {
		u32 sfp_cage_full;

		switch (hw->mac.type) {
		case ixgbe_mac_82599EB:
			sfp_cage_full = IXGBE_READ_REG(hw, IXGBE_ESDP) &
					IXGBE_ESDP_SDP2;
			break;
		case ixgbe_mac_X550EM_x:
		case ixgbe_mac_X550EM_a:
			sfp_cage_full = IXGBE_READ_REG(hw, IXGBE_ESDP) &
					IXGBE_ESDP_SDP0;
			break;
		default:
			/* Non-SFP+ system - sanity check */
			sfp_cage_full = false;
			break;
		}
		if (!sfp_cage_full)
			return;
	}

	/* not searching for SFP so there is nothing to do here */
	if (!(adapter->flags2 & IXGBE_FLAG2_SEARCH_FOR_SFP) &&
	    !(adapter->flags2 & IXGBE_FLAG2_SFP_NEEDS_RESET))
		return;

	if (adapter->sfp_poll_time &&
	    time_after(adapter->sfp_poll_time, jiffies))
		return;	/* If not yet time to poll for SFP */

	/* someone else is in init, wait until next service event */
	if (test_and_set_bit(__IXGBE_IN_SFP_INIT, &adapter->state))
		return;

	adapter->sfp_poll_time = jiffies + IXGBE_SFP_POLL_JIFFIES - 1;

	err = hw->phy.ops.identify_sfp(hw);
	if (err == IXGBE_ERR_SFP_NOT_SUPPORTED)
		goto sfp_out;

	if (err == IXGBE_ERR_SFP_NOT_PRESENT) {
		/* If no cable is present, then we need to reset
		 * the next time we find a good cable. */
		adapter->flags2 |= IXGBE_FLAG2_SFP_NEEDS_RESET;
	}

	/* exit on error */
	if (err)
		goto sfp_out;

	/* exit if reset not needed */
	if (!(adapter->flags2 & IXGBE_FLAG2_SFP_NEEDS_RESET))
		goto sfp_out;

	adapter->flags2 &= ~IXGBE_FLAG2_SFP_NEEDS_RESET;

	/*
	 * A module may be identified correctly, but the EEPROM may not have
	 * support for that module.  setup_sfp() will fail in that case, so
	 * we should not allow that module to load.
	 */
	if (hw->mac.type == ixgbe_mac_82598EB)
		err = hw->phy.ops.reset(hw);
	else
		err = hw->mac.ops.setup_sfp(hw);

	if (err == IXGBE_ERR_SFP_NOT_SUPPORTED)
		goto sfp_out;

	adapter->flags |= IXGBE_FLAG_NEED_LINK_CONFIG;
	e_info(probe, "detected SFP+: %d\n", hw->phy.sfp_type);

sfp_out:
	clear_bit(__IXGBE_IN_SFP_INIT, &adapter->state);

	if ((err == IXGBE_ERR_SFP_NOT_SUPPORTED) &&
	    adapter->netdev_registered) {
		e_dev_err("failed to initialize because an unsupported "
			  "SFP+ module type was detected.\n");
		e_dev_err("Reload the driver after installing a "
			  "supported module.\n");
		unregister_netdev(adapter->netdev);
		adapter->netdev_registered = false;
	}
}

/**
 * ixgbe_sfp_link_config_subtask - set up link SFP after module install
 * @adapter - the ixgbe adapter structure
 **/
static void ixgbe_sfp_link_config_subtask(struct ixgbe_adapter *adapter)
{
	struct ixgbe_hw *hw = &adapter->hw;
	u32 cap_speed;
	u32 speed = 0;
	bool autoneg = false;

	if (!(adapter->flags & IXGBE_FLAG_NEED_LINK_CONFIG))
		return;

	/* someone else is in init, wait until next service event */
	if (test_and_set_bit(__IXGBE_IN_SFP_INIT, &adapter->state))
		return;

	adapter->flags &= ~IXGBE_FLAG_NEED_LINK_CONFIG;

	hw->mac.ops.get_link_capabilities(hw, &cap_speed, &autoneg);

	/* Advertise highest capable link speed */
	if (cap_speed & IXGBE_LINK_SPEED_10GB_FULL) {
		if (!autoneg)
			speed = IXGBE_LINK_SPEED_10GB_FULL;
		else
			speed = cap_speed;
	} else if (cap_speed == IXGBE_LINK_SPEED_1GB_FULL) {
		speed = IXGBE_LINK_SPEED_1GB_FULL;
	}

	if (hw->mac.ops.setup_link)
		hw->mac.ops.setup_link(hw, speed, true);

	adapter->flags |= IXGBE_FLAG_NEED_LINK_UPDATE;
	adapter->link_check_timeout = jiffies;
	clear_bit(__IXGBE_IN_SFP_INIT, &adapter->state);
}

/**
 * ixgbe_service_timer - Timer Call-back
 * @t: pointer to timer_list
 **/
static void ixgbe_service_timer(struct timer_list *t)
{
	struct ixgbe_adapter *adapter = from_timer(adapter, t, service_timer);
	unsigned long next_event_offset;

	/* poll faster when waiting for link */
	if (adapter->flags & IXGBE_FLAG_NEED_LINK_UPDATE)
		next_event_offset = HZ / 10;
	else
		next_event_offset = HZ * 2;

	/* Reset the timer */
	mod_timer(&adapter->service_timer, next_event_offset + jiffies);

	ixgbe_service_event_schedule(adapter);
}

static void ixgbe_phy_interrupt_subtask(struct ixgbe_adapter *adapter)
{
	u32 status;

	if (!(adapter->flags2 & IXGBE_FLAG2_PHY_INTERRUPT))
		return;
	adapter->flags2 &= ~IXGBE_FLAG2_PHY_INTERRUPT;
	status = ixgbe_handle_lasi(&adapter->hw);
	if (status != IXGBE_ERR_OVERTEMP)
		return;
	e_crit(drv, "%s\n", ixgbe_overheat_msg);
}

static void ixgbe_reset_subtask(struct ixgbe_adapter *adapter)
{
	if (!test_and_clear_bit(__IXGBE_RESET_REQUESTED, &adapter->state))
		return;

	/* If we're already down or resetting, just bail */
	if (test_bit(__IXGBE_DOWN, &adapter->state) ||
	    test_bit(__IXGBE_REMOVE, &adapter->state) ||
	    test_bit(__IXGBE_RESETTING, &adapter->state))
		return;

	netdev_err(adapter->netdev, "Reset adapter\n");
	adapter->tx_timeout_count++;

	rtnl_lock();
	ixgbe_reinit_locked(adapter);
	rtnl_unlock();
}

/**
 * ixgbe_service_task - manages and runs subtasks
 * @work: pointer to work_struct containing our data
 **/
static void ixgbe_service_task(struct work_struct *work)
{
	struct ixgbe_adapter *adapter = container_of(work,
						     struct ixgbe_adapter,
						     service_task);
	if (IXGBE_REMOVED(adapter->hw.hw_addr)) {
		if (!test_bit(__IXGBE_DOWN, &adapter->state)) {
			rtnl_lock();
			ixgbe_down(adapter);
			rtnl_unlock();
		}
		ixgbe_service_event_complete(adapter);
		return;
	}
#if defined(HAVE_UDP_ENC_RX_OFFLOAD) || defined(HAVE_VXLAN_RX_OFFLOAD)
	if (adapter->flags2 & IXGBE_FLAG2_UDP_TUN_REREG_NEEDED) {
		rtnl_lock();
		adapter->flags2 &= ~IXGBE_FLAG2_UDP_TUN_REREG_NEEDED;
#ifdef HAVE_UDP_ENC_RX_OFFLOAD
		udp_tunnel_get_rx_info(adapter->netdev);
#else
		vxlan_get_rx_port(adapter->netdev);
#endif /* HAVE_UDP_ENC_RX_OFFLOAD */
		rtnl_unlock();
	}
#endif /* HAVE_UDP_ENC_RX_OFFLOAD || HAVE_VXLAN_RX_OFFLOAD */
	ixgbe_reset_subtask(adapter);
	ixgbe_phy_interrupt_subtask(adapter);
	ixgbe_sfp_detection_subtask(adapter);
	ixgbe_sfp_link_config_subtask(adapter);
	ixgbe_check_overtemp_subtask(adapter);
	ixgbe_watchdog_subtask(adapter);
#ifdef HAVE_TX_MQ
	ixgbe_fdir_reinit_subtask(adapter);
#endif
	ixgbe_check_hang_subtask(adapter);
#ifdef HAVE_PTP_1588_CLOCK
	if (test_bit(__IXGBE_PTP_RUNNING, &adapter->state)) {
		ixgbe_ptp_overflow_check(adapter);
		if (unlikely(adapter->flags & IXGBE_FLAG_RX_HWTSTAMP_IN_REGISTER))
			ixgbe_ptp_rx_hang(adapter);
		ixgbe_ptp_tx_hang(adapter);
	}
#endif /* HAVE_PTP_1588_CLOCK */

	ixgbe_service_event_complete(adapter);
}

static int ixgbe_tso(struct ixgbe_ring *tx_ring,
		     struct ixgbe_tx_buffer *first,
		     u8 *hdr_len)
{
#ifdef NETIF_F_TSO
	u32 vlan_macip_lens, type_tucmd, mss_l4len_idx;
	struct sk_buff *skb = first->skb;
	union {
		struct iphdr *v4;
		struct ipv6hdr *v6;
		unsigned char *hdr;
	} ip;
	union {
		struct tcphdr *tcp;
		unsigned char *hdr;
	} l4;
	u32 paylen, l4_offset;
	int err;

	if (skb->ip_summed != CHECKSUM_PARTIAL)
		return 0;

	if (!skb_is_gso(skb))
		return 0;

	err = skb_cow_head(skb, 0);
	if (err < 0)
		return err;

	ip.hdr = skb_network_header(skb);
	l4.hdr = skb_checksum_start(skb);

	/* ADV DTYP TUCMD MKRLOC/ISCSIHEDLEN */
	type_tucmd = IXGBE_ADVTXD_TUCMD_L4T_TCP;

	/* initialize outer IP header fields */
	if (ip.v4->version == 4) {
		unsigned char *csum_start = skb_checksum_start(skb);
		unsigned char *trans_start = ip.hdr + (ip.v4->ihl * 4);

		/* IP header will have to cancel out any data that
		 * is not a part of the outer IP header
		 */
		ip.v4->check = csum_fold(csum_partial(trans_start,
						      csum_start - trans_start,
						      0));
		type_tucmd |= IXGBE_ADVTXD_TUCMD_IPV4;

		ip.v4->tot_len = 0;
		first->tx_flags |= IXGBE_TX_FLAGS_TSO |
				   IXGBE_TX_FLAGS_CSUM |
				   IXGBE_TX_FLAGS_IPV4;
	} else {
		ip.v6->payload_len = 0;
		first->tx_flags |= IXGBE_TX_FLAGS_TSO |
				   IXGBE_TX_FLAGS_CSUM;
	}

	/* determine offset of inner transport header */
	l4_offset = l4.hdr - skb->data;

	/* compute length of segmentation header */
	*hdr_len = (l4.tcp->doff * 4) + l4_offset;

	/* remove payload length from inner checksum */
	paylen = skb->len - l4_offset;
	csum_replace_by_diff(&l4.tcp->check, htonl(paylen));

	/* 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_id: use 0 as index for TSO */
	mss_l4len_idx = (*hdr_len - l4_offset) << IXGBE_ADVTXD_L4LEN_SHIFT;
	mss_l4len_idx |= skb_shinfo(skb)->gso_size << IXGBE_ADVTXD_MSS_SHIFT;

	/* vlan_macip_lens: HEADLEN, MACLEN, VLAN tag */
	vlan_macip_lens = l4.hdr - ip.hdr;
	vlan_macip_lens |= (ip.hdr - skb->data) << IXGBE_ADVTXD_MACLEN_SHIFT;
	vlan_macip_lens |= first->tx_flags & IXGBE_TX_FLAGS_VLAN_MASK;

	ixgbe_tx_ctxtdesc(tx_ring, vlan_macip_lens, 0, type_tucmd,
			  mss_l4len_idx);

	return 1;
#else
	return 0;
#endif /* NETIF_F_TSO */
}

static inline bool ixgbe_ipv6_csum_is_sctp(struct sk_buff *skb)
{
	unsigned int offset = 0;

	ipv6_find_hdr(skb, &offset, IPPROTO_SCTP, NULL, NULL);

	return offset == skb_checksum_start_offset(skb);
}

static void ixgbe_tx_csum(struct ixgbe_ring *tx_ring,
			  struct ixgbe_tx_buffer *first)
{
	struct sk_buff *skb = first->skb;
	u32 vlan_macip_lens = 0;
	u32 type_tucmd = 0;

	if (skb->ip_summed != CHECKSUM_PARTIAL) {
csum_failed:
		if (!(first->tx_flags & (IXGBE_TX_FLAGS_HW_VLAN |
					 IXGBE_TX_FLAGS_CC)))
			return;
		goto no_csum;
	}

	switch (skb->csum_offset) {
	case offsetof(struct tcphdr, check):
		type_tucmd = IXGBE_ADVTXD_TUCMD_L4T_TCP;
		/* fall through */
	case offsetof(struct udphdr, check):
		break;
	case offsetof(struct sctphdr, checksum):
		/* validate that this is actually an SCTP request */
		if (((first->protocol == htons(ETH_P_IP)) &&
		     (ip_hdr(skb)->protocol == IPPROTO_SCTP)) ||
		    ((first->protocol == htons(ETH_P_IPV6)) &&
		     ixgbe_ipv6_csum_is_sctp(skb))) {
			type_tucmd = IXGBE_ADVTXD_TUCMD_L4T_SCTP;
			break;
		}
		/* fall through */
	default:
		skb_checksum_help(skb);
		goto csum_failed;
	}

	/* update TX checksum flag */
	first->tx_flags |= IXGBE_TX_FLAGS_CSUM;
	vlan_macip_lens = skb_checksum_start_offset(skb) -
			  skb_network_offset(skb);
no_csum:
	/* vlan_macip_lens: MACLEN, VLAN tag */
	vlan_macip_lens |= skb_network_offset(skb) << IXGBE_ADVTXD_MACLEN_SHIFT;
	vlan_macip_lens |= first->tx_flags & IXGBE_TX_FLAGS_VLAN_MASK;

	ixgbe_tx_ctxtdesc(tx_ring, vlan_macip_lens, 0, type_tucmd, 0);
}

#define IXGBE_SET_FLAG(_input, _flag, _result) \
	((_flag <= _result) ? \
	 ((u32)(_input & _flag) * (_result / _flag)) : \
	 ((u32)(_input & _flag) / (_flag / _result)))

static u32 ixgbe_tx_cmd_type(u32 tx_flags)
{
	/* set type for advanced descriptor with frame checksum insertion */
	u32 cmd_type = IXGBE_ADVTXD_DTYP_DATA |
		       IXGBE_ADVTXD_DCMD_DEXT |
		       IXGBE_ADVTXD_DCMD_IFCS;

	/* set HW vlan bit if vlan is present */
	cmd_type |= IXGBE_SET_FLAG(tx_flags, IXGBE_TX_FLAGS_HW_VLAN,
				   IXGBE_ADVTXD_DCMD_VLE);

	/* set segmentation enable bits for TSO/FSO */
	cmd_type |= IXGBE_SET_FLAG(tx_flags, IXGBE_TX_FLAGS_TSO,
				   IXGBE_ADVTXD_DCMD_TSE);

	/* set timestamp bit if present */
	cmd_type |= IXGBE_SET_FLAG(tx_flags, IXGBE_TX_FLAGS_TSTAMP,
				   IXGBE_ADVTXD_MAC_TSTAMP);

	return cmd_type;
}

static void ixgbe_tx_olinfo_status(union ixgbe_adv_tx_desc *tx_desc,
				   u32 tx_flags, unsigned int paylen)
{
	u32 olinfo_status = paylen << IXGBE_ADVTXD_PAYLEN_SHIFT;

	/* enable L4 checksum for TSO and TX checksum offload */
	olinfo_status |= IXGBE_SET_FLAG(tx_flags,
					IXGBE_TX_FLAGS_CSUM,
					IXGBE_ADVTXD_POPTS_TXSM);

	/* enble IPv4 checksum for TSO */
	olinfo_status |= IXGBE_SET_FLAG(tx_flags,
					IXGBE_TX_FLAGS_IPV4,
					IXGBE_ADVTXD_POPTS_IXSM);

	/*
	 * Check Context must be set if Tx switch is enabled, which it
	 * always is for case where virtual functions are running
	 */
	olinfo_status |= IXGBE_SET_FLAG(tx_flags,
					IXGBE_TX_FLAGS_CC,
					IXGBE_ADVTXD_CC);

	tx_desc->read.olinfo_status = cpu_to_le32(olinfo_status);
}

static int __ixgbe_maybe_stop_tx(struct ixgbe_ring *tx_ring, u16 size)
{
	netif_stop_subqueue(tx_ring->netdev, tx_ring->queue_index);

	/* Herbert's original patch had:
	 *  smp_mb__after_netif_stop_queue();
	 * but since that doesn't exist yet, just open code it.
	 */
	smp_mb();

	/* We need to check again in a case another CPU has just
	 * made room available.
	 */
	if (likely(ixgbe_desc_unused(tx_ring) < size))
		return -EBUSY;

	/* A reprieve! - use start_queue because it doesn't call schedule */
	netif_start_subqueue(tx_ring->netdev, tx_ring->queue_index);
	++tx_ring->tx_stats.restart_queue;
	return 0;
}

static inline int ixgbe_maybe_stop_tx(struct ixgbe_ring *tx_ring, u16 size)
{
	if (likely(ixgbe_desc_unused(tx_ring) >= size))
		return 0;

	return __ixgbe_maybe_stop_tx(tx_ring, size);
}

#define IXGBE_TXD_CMD (IXGBE_TXD_CMD_EOP | \
		       IXGBE_TXD_CMD_RS)

static int ixgbe_tx_map(struct ixgbe_ring *tx_ring,
			struct ixgbe_tx_buffer *first,
			const u8 hdr_len)
{
	struct sk_buff *skb = first->skb;
	struct ixgbe_tx_buffer *tx_buffer;
	union ixgbe_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 = ixgbe_tx_cmd_type(tx_flags);
	u16 i = tx_ring->next_to_use;

	tx_desc = IXGBE_TX_DESC(tx_ring, i);

	ixgbe_tx_olinfo_status(tx_desc, tx_flags, skb->len - hdr_len);

	size = skb_headlen(skb);
	data_len = skb->data_len;

#if IS_ENABLED(CONFIG_FCOE)
	if (tx_flags & IXGBE_TX_FLAGS_FCOE) {
		if (data_len < sizeof(struct fcoe_crc_eof)) {
			size -= sizeof(struct fcoe_crc_eof) - data_len;
			data_len = 0;
		} else {
			data_len -= sizeof(struct fcoe_crc_eof);
		}
	}
#endif /* CONFIG_FCOE */

	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 > IXGBE_MAX_DATA_PER_TXD)) {
			tx_desc->read.cmd_type_len =
				cpu_to_le32(cmd_type ^ IXGBE_MAX_DATA_PER_TXD);

			i++;
			tx_desc++;
			if (i == tx_ring->count) {
				tx_desc = IXGBE_TX_DESC(tx_ring, 0);
				i = 0;
			}
			tx_desc->read.olinfo_status = 0;

			dma += IXGBE_MAX_DATA_PER_TXD;
			size -= IXGBE_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 = IXGBE_TX_DESC(tx_ring, 0);
			i = 0;
		}
		tx_desc->read.olinfo_status = 0;

#if IS_ENABLED(CONFIG_FCOE)
		size = min_t(unsigned int, data_len, skb_frag_size(frag));
#else
		size = skb_frag_size(frag);
#endif
		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 | IXGBE_TXD_CMD;
	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;

#ifndef HAVE_TRANS_START_IN_QUEUE
	netdev_ring(tx_ring)->trans_start = first->time_stamp;
#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).
	 *
	 * 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;

	ixgbe_maybe_stop_tx(tx_ring, DESC_NEEDED);

#ifdef HAVE_SKB_XMIT_MORE
	if (netif_xmit_stopped(txring_txq(tx_ring)) || !skb->xmit_more) {
		writel(i, tx_ring->tail);

		/* we need this if more than one processor can write to our tail
		 * at a time, it synchronizes IO on IA64/Altix systems
		 */
		mmiowb();
	}
#else
	/* notify HW of packet */
	writel(i, tx_ring->tail);

	/* we need this if more than one processor can write to our tail
	 * at a time, it synchronizes IO on IA64/Altix systems
	 */
	mmiowb();
#endif /* HAVE_SKB_XMIT_MORE */

	return 0;
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];
		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);
		if (tx_buffer == first)
			break;
		if (i == 0)
			i += tx_ring->count;
		i--;
	}

	dev_kfree_skb_any(first->skb);
	first->skb = NULL;

	tx_ring->next_to_use = i;

	return -1;
}

static void ixgbe_atr(struct ixgbe_ring *ring,
		      struct ixgbe_tx_buffer *first)
{
	struct ixgbe_q_vector *q_vector = ring->q_vector;
	union ixgbe_atr_hash_dword input = { .dword = 0 };
	union ixgbe_atr_hash_dword common = { .dword = 0 };
	union {
		unsigned char *network;
		struct iphdr *ipv4;
		struct ipv6hdr *ipv6;
	} hdr;
	struct tcphdr *th;
	struct sk_buff *skb;
	unsigned int hlen;
	__be16 vlan_id;
	int l4_proto;

	/* if ring doesn't have a interrupt vector, cannot perform ATR */
	if (!q_vector)
		return;

	/* do nothing if sampling is disabled */
	if (!ring->atr_sample_rate)
		return;

	ring->atr_count++;

	/* currently only IPv4/IPv6 with TCP is supported */
	if (first->protocol != htons(ETH_P_IP) &&
	    first->protocol != htons(ETH_P_IPV6))
		return;

	/* snag network header to get L4 type and address */
	skb = first->skb;
	hdr.network = skb_network_header(skb);

#if defined(HAVE_UDP_ENC_RX_OFFLOAD) || defined(HAVE_VXLAN_RX_OFFLOAD)
	if (unlikely(hdr.network <= skb->data))
		return;

	if (skb->encapsulation &&
	    first->protocol == htons(ETH_P_IP) &&
	    hdr.ipv4->protocol == IPPROTO_UDP) {
		struct ixgbe_adapter *adapter = q_vector->adapter;

		if (unlikely(skb_tail_pointer(skb) < hdr.network +
			     VXLAN_HEADROOM))
			return;

		/* verify the port is recognized as VXLAN or GENEVE*/
		if (adapter->vxlan_port &&
		    udp_hdr(skb)->dest == adapter->vxlan_port)
			hdr.network = skb_inner_network_header(skb);

#ifdef HAVE_UDP_ENC_RX_OFFLOAD
		if (adapter->geneve_port &&
		    udp_hdr(skb)->dest == adapter->geneve_port)
			hdr.network = skb_inner_network_header(skb);
#endif
	}
#endif /* HAVE_UDP_ENC_RX_OFFLOAD || HAVE_VXLAN_RX_OFFLOAD */

	/* Make sure we have at least [minimum IPv4 header + TCP]
	 * or [IPv6 header] bytes
	 */
	if (unlikely(skb_tail_pointer(skb) < hdr.network + 40))
		return;

	/* Currently only IPv4/IPv6 with TCP is supported */
	switch (hdr.ipv4->version) {
	case IPVERSION:
		/* access ihl as u8 to avoid unaligned access on ia64 */
		hlen = (hdr.network[0] & 0x0F) << 2;
		l4_proto = hdr.ipv4->protocol;
		break;
	case 6:
		hlen = hdr.network - skb->data;
		l4_proto = ipv6_find_hdr(skb, &hlen, IPPROTO_TCP, NULL, NULL);
		hlen -= hdr.network - skb->data;
		break;
	default:
		return;
	}

	if (l4_proto != IPPROTO_TCP)
		return;

	if (unlikely(skb_tail_pointer(skb) < hdr.network +
		     hlen + sizeof(struct tcphdr)))
		return;

	th = (struct tcphdr *)(hdr.network + hlen);

	/* skip this packet since the socket is closing */
	if (th->fin)
		return;

	/* sample on all syn packets or once every atr sample count */
	if (!th->syn && (ring->atr_count < ring->atr_sample_rate))
		return;

	/* reset sample count */
	ring->atr_count = 0;

	vlan_id = htons(first->tx_flags >> IXGBE_TX_FLAGS_VLAN_SHIFT);

	/*
	 * src and dst are inverted, think how the receiver sees them
	 *
	 * The input is broken into two sections, a non-compressed section
	 * containing vm_pool, vlan_id, and flow_type.  The rest of the data
	 * is XORed together and stored in the compressed dword.
	 */
	input.formatted.vlan_id = vlan_id;

	/*
	 * since src port and flex bytes occupy the same word XOR them together
	 * and write the value to source port portion of compressed dword
	 */
	if (first->tx_flags & (IXGBE_TX_FLAGS_SW_VLAN | IXGBE_TX_FLAGS_HW_VLAN))
		common.port.src ^= th->dest ^ htons(ETH_P_8021Q);
	else
		common.port.src ^= th->dest ^ first->protocol;
	common.port.dst ^= th->source;

	switch (hdr.ipv4->version) {
	case IPVERSION:
		input.formatted.flow_type = IXGBE_ATR_FLOW_TYPE_TCPV4;
		common.ip ^= hdr.ipv4->saddr ^ hdr.ipv4->daddr;
		break;
	case 6:
		input.formatted.flow_type = IXGBE_ATR_FLOW_TYPE_TCPV6;
		common.ip ^= hdr.ipv6->saddr.s6_addr32[0] ^
			     hdr.ipv6->saddr.s6_addr32[1] ^
			     hdr.ipv6->saddr.s6_addr32[2] ^
			     hdr.ipv6->saddr.s6_addr32[3] ^
			     hdr.ipv6->daddr.s6_addr32[0] ^
			     hdr.ipv6->daddr.s6_addr32[1] ^
			     hdr.ipv6->daddr.s6_addr32[2] ^
			     hdr.ipv6->daddr.s6_addr32[3];
		break;
	default:
		break;
	}

#if defined(HAVE_UDP_ENC_RX_OFFLOAD) || defined(HAVE_VXLAN_RX_OFFLOAD)
	if (hdr.network != skb_network_header(skb))
		input.formatted.flow_type |= IXGBE_ATR_L4TYPE_TUNNEL_MASK;
#endif /* HAVE_UDP_ENC_RX_OFFLOAD || HAVE_VXLAN_RX_OFFLOAD */

	/* This assumes the Rx queue and Tx queue are bound to the same CPU */
	ixgbe_fdir_add_signature_filter_82599(&q_vector->adapter->hw,
					      input, common, ring->queue_index);
}
#ifdef HAVE_NETDEV_SELECT_QUEUE
#if IS_ENABLED(CONFIG_FCOE)

#if defined(HAVE_NDO_SELECT_QUEUE_ACCEL_FALLBACK)
static u16 ixgbe_select_queue(struct net_device *dev, struct sk_buff *skb,
			      __always_unused void *accel,
			      select_queue_fallback_t fallback)
#elif defined(HAVE_NDO_SELECT_QUEUE_ACCEL)
static u16 ixgbe_select_queue(struct net_device *dev, struct sk_buff *skb,
			      __always_unused void *accel)
#else
static u16 ixgbe_select_queue(struct net_device *dev, struct sk_buff *skb)
#endif /* HAVE_NDO_SELECT_QUEUE_ACCEL_FALLBACK */
{
	struct ixgbe_adapter *adapter = netdev_priv(dev);
	struct ixgbe_ring_feature *f;
	int txq;

	/*
	 * only execute the code below if protocol is FCoE
	 * or FIP and we have FCoE enabled on the adapter
	 */
	switch (vlan_get_protocol(skb)) {
	case __constant_htons(ETH_P_FCOE):
	case __constant_htons(ETH_P_FIP):
		adapter = netdev_priv(dev);

		if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED)
			break;
		/* fall through */
	default:
#ifdef HAVE_NDO_SELECT_QUEUE_ACCEL_FALLBACK
		return fallback(dev, skb);
#else
		return __netdev_pick_tx(dev, skb);
#endif
	}

	f = &adapter->ring_feature[RING_F_FCOE];

	txq = skb_rx_queue_recorded(skb) ? skb_get_rx_queue(skb) :
					   smp_processor_id();

	while (txq >= f->indices)
		txq -= f->indices;

	return txq + f->offset;
}
#endif /* CONFIG_FCOE */
#endif /* HAVE_NETDEV_SELECT_QUEUE */

netdev_tx_t ixgbe_xmit_frame_ring(struct sk_buff *skb,
				  struct ixgbe_adapter __maybe_unused *adapter,
				  struct ixgbe_ring *tx_ring)
{
	struct ixgbe_tx_buffer *first;
	int tso;
	u32 tx_flags = 0;
	unsigned short f;
	u16 count = TXD_USE_COUNT(skb_headlen(skb));
	__be16 protocol = skb->protocol;
	u8 hdr_len = 0;

	/*
	 * need: 1 descriptor per page * PAGE_SIZE/IXGBE_MAX_DATA_PER_TXD,
	 *       + 1 desc for skb_headlen/IXGBE_MAX_DATA_PER_TXD,
	 *       + 2 desc gap to keep tail from touching head,
	 *       + 1 desc for context descriptor,
	 * otherwise try next time
	 */
	for (f = 0; f < skb_shinfo(skb)->nr_frags; f++)
		count += TXD_USE_COUNT(skb_shinfo(skb)->frags[f].size);

	if (ixgbe_maybe_stop_tx(tx_ring, count + 3)) {
		tx_ring->tx_stats.tx_busy++;
		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;

	/* if we have a HW VLAN tag being added default to the HW one */
	if (skb_vlan_tag_present(skb)) {
		tx_flags |= skb_vlan_tag_get(skb) << IXGBE_TX_FLAGS_VLAN_SHIFT;
		tx_flags |= IXGBE_TX_FLAGS_HW_VLAN;
	/* else if it is a SW VLAN check the next protocol and store the tag */
	} else if (protocol == htons(ETH_P_8021Q)) {
		struct vlan_hdr *vhdr, _vhdr;
		vhdr = skb_header_pointer(skb, ETH_HLEN, sizeof(_vhdr), &_vhdr);
		if (!vhdr)
			goto out_drop;

		protocol = vhdr->h_vlan_encapsulated_proto;
		tx_flags |= ntohs(vhdr->h_vlan_TCI) <<
				  IXGBE_TX_FLAGS_VLAN_SHIFT;
		tx_flags |= IXGBE_TX_FLAGS_SW_VLAN;
	}

	skb_tx_timestamp(skb);

#ifdef HAVE_PTP_1588_CLOCK
#ifdef SKB_SHARED_TX_IS_UNION
	if (unlikely(skb_tx(skb)->hardware) &&
	    adapter->ptp_clock) {
		if (!test_and_set_bit_lock(__IXGBE_PTP_TX_IN_PROGRESS,
					   &adapter->state)) {
			skb_tx(skb)->in_progress = 1;
#else
	if (unlikely(skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP) &&
	    adapter->ptp_clock) {
		if (!test_and_set_bit_lock(__IXGBE_PTP_TX_IN_PROGRESS,
				   &adapter->state)) {
			skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS;
#endif
			tx_flags |= IXGBE_TX_FLAGS_TSTAMP;

			/* schedule check for Tx timestamp */
			adapter->ptp_tx_skb = skb_get(skb);
			adapter->ptp_tx_start = jiffies;
			schedule_work(&adapter->ptp_tx_work);
		} else {
			adapter->tx_hwtstamp_skipped++;
		}
	}

#endif
#ifdef CONFIG_PCI_IOV
	/*
	 * Use the l2switch_enable flag - would be false if the DMA
	 * Tx switch had been disabled.
	 */
	if (adapter->flags & IXGBE_FLAG_SRIOV_L2SWITCH_ENABLE)
		tx_flags |= IXGBE_TX_FLAGS_CC;

#endif
#ifdef HAVE_TX_MQ
	if ((adapter->flags & IXGBE_FLAG_DCB_ENABLED) &&
	    ((tx_flags & (IXGBE_TX_FLAGS_HW_VLAN | IXGBE_TX_FLAGS_SW_VLAN)) ||
	     (skb->priority != TC_PRIO_CONTROL))) {
		tx_flags &= ~IXGBE_TX_FLAGS_VLAN_PRIO_MASK;
#if IS_ENABLED(CONFIG_FCOE)
		/* for FCoE with DCB, we force the priority to what
		 * was specified by the switch */
		if ((adapter->flags & IXGBE_FLAG_FCOE_ENABLED) &&
		    ((protocol == htons(ETH_P_FCOE)) ||
		     (protocol == htons(ETH_P_FIP))))
			tx_flags |= adapter->fcoe.up <<
				    IXGBE_TX_FLAGS_VLAN_PRIO_SHIFT;
		else
#endif /* CONFIG_FCOE */
			tx_flags |= skb->priority <<
				    IXGBE_TX_FLAGS_VLAN_PRIO_SHIFT;
		if (tx_flags & IXGBE_TX_FLAGS_SW_VLAN) {
			struct vlan_ethhdr *vhdr;
			if (skb_header_cloned(skb) &&
			    pskb_expand_head(skb, 0, 0, GFP_ATOMIC))
				goto out_drop;
			vhdr = (struct vlan_ethhdr *)skb->data;
			vhdr->h_vlan_TCI = htons(tx_flags >>
						 IXGBE_TX_FLAGS_VLAN_SHIFT);
		} else {
			tx_flags |= IXGBE_TX_FLAGS_HW_VLAN;
		}
	}

#endif /* HAVE_TX_MQ */
	/* record initial flags and protocol */
	first->tx_flags = tx_flags;
	first->protocol = protocol;

#if IS_ENABLED(CONFIG_FCOE)
	/* setup tx offload for FCoE */
	if ((protocol == htons(ETH_P_FCOE)) &&
	    (tx_ring->netdev->features & (NETIF_F_FSO | NETIF_F_FCOE_CRC))) {
		tso = ixgbe_fso(tx_ring, first, &hdr_len);
		if (tso < 0)
			goto out_drop;

		goto xmit_fcoe;
	} else if (protocol ==  htons(ETH_P_FIP)) {
		/* FCoE stack has a bug where it does not set the network
		 * header offset for FIP frames sent resulting into MACLEN
		 * being set to ZERO in the Tx context descriptor.
		 * This will cause MDD events when trying to Tx such frames.
		 */
		if (!skb_network_offset(skb)) {
			if (tx_flags & (IXGBE_TX_FLAGS_HW_VLAN |
			    IXGBE_TX_FLAGS_SW_VLAN))
				skb_set_network_header(skb,
						sizeof(struct ethhdr) +
						sizeof(struct vlan_hdr));
			else
				skb_set_network_header(skb,
						sizeof(struct ethhdr));
		}
	}
#endif /* CONFIG_FCOE */

	tso = ixgbe_tso(tx_ring, first, &hdr_len);
	if (tso < 0)
		goto out_drop;
	else if (!tso)
		ixgbe_tx_csum(tx_ring, first);

	/* add the ATR filter if ATR is on */
	if (test_bit(__IXGBE_TX_FDIR_INIT_DONE, &tx_ring->state))
		ixgbe_atr(tx_ring, first);

#if IS_ENABLED(CONFIG_FCOE)
xmit_fcoe:
#endif /* CONFIG_FCOE */
#ifdef HAVE_PTP_1588_CLOCK
	if (ixgbe_tx_map(tx_ring, first, hdr_len))
		goto cleanup_tx_tstamp;
#else
	ixgbe_tx_map(tx_ring, first, hdr_len);
#endif

	return NETDEV_TX_OK;

out_drop:
	dev_kfree_skb_any(first->skb);
	first->skb = NULL;
#ifdef HAVE_PTP_1588_CLOCK
cleanup_tx_tstamp:
	if (unlikely(tx_flags & IXGBE_TX_FLAGS_TSTAMP)) {
		dev_kfree_skb_any(adapter->ptp_tx_skb);
		adapter->ptp_tx_skb = NULL;
		cancel_work_sync(&adapter->ptp_tx_work);
		clear_bit_unlock(__IXGBE_PTP_TX_IN_PROGRESS, &adapter->state);
	}
#endif

	return NETDEV_TX_OK;
}

static netdev_tx_t __ixgbe_xmit_frame(struct sk_buff *skb,
				      struct net_device *netdev,
				      __always_unused struct ixgbe_ring *ring)
{
	struct ixgbe_adapter *adapter = netdev_priv(netdev);
	struct ixgbe_ring *tx_ring;
#ifdef HAVE_TX_MQ
	unsigned int r_idx = skb->queue_mapping;
#endif

	if (!netif_carrier_ok(netdev)) {
		dev_kfree_skb_any(skb);
		return NETDEV_TX_OK;
	}

	/*
	 * The minimum packet size for olinfo paylen is 17 so pad the skb
	 * in order to meet this minimum size requirement.
	 */
	if (skb_put_padto(skb, 17))
		return NETDEV_TX_OK;

#ifdef HAVE_TX_MQ
	if (r_idx >= adapter->num_tx_queues)
		r_idx = r_idx % adapter->num_tx_queues;
	tx_ring = adapter->tx_ring[r_idx];
#else
	tx_ring = adapter->tx_ring[0];
#endif
	return ixgbe_xmit_frame_ring(skb, adapter, tx_ring);
}

static netdev_tx_t ixgbe_xmit_frame(struct sk_buff *skb,
				    struct net_device *netdev)
{
	return __ixgbe_xmit_frame(skb, netdev, NULL);
}

/**
 * ixgbe_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 ixgbe_set_mac(struct net_device *netdev, void *p)
{
	struct ixgbe_adapter *adapter = netdev_priv(netdev);
	struct ixgbe_hw *hw = &adapter->hw;
	struct sockaddr *addr = p;

	if (!is_valid_ether_addr(addr->sa_data))
		return -EADDRNOTAVAIL;

	memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
	memcpy(hw->mac.addr, addr->sa_data, netdev->addr_len);

	ixgbe_mac_set_default_filter(adapter);

	return 0;
}

#if defined(HAVE_NETDEV_STORAGE_ADDRESS) && defined(NETDEV_HW_ADDR_T_SAN)
/**
 * ixgbe_add_sanmac_netdev - Add the SAN MAC address to the corresponding
 * netdev->dev_addr_list
 * @netdev: network interface device structure
 *
 * Returns non-zero on failure
 **/
static int ixgbe_add_sanmac_netdev(struct net_device *dev)
{
	int err = IXGBE_SUCCESS;
	struct ixgbe_adapter *adapter = netdev_priv(dev);
	struct ixgbe_hw *hw = &adapter->hw;

	if (is_valid_ether_addr(hw->mac.san_addr)) {
		rtnl_lock();
		err = dev_addr_add(dev, hw->mac.san_addr,
				   NETDEV_HW_ADDR_T_SAN);
		rtnl_unlock();

		/* update SAN MAC vmdq pool selection */
		hw->mac.ops.set_vmdq_san_mac(hw, VMDQ_P(0));
	}
	return err;
}

/**
 * ixgbe_del_sanmac_netdev - Removes the SAN MAC address to the corresponding
 * netdev->dev_addr_list
 * @netdev: network interface device structure
 *
 * Returns non-zero on failure
 **/
static int ixgbe_del_sanmac_netdev(struct net_device *dev)
{
	int err = IXGBE_SUCCESS;
	struct ixgbe_adapter *adapter = netdev_priv(dev);
	struct ixgbe_mac_info *mac = &adapter->hw.mac;

	if (is_valid_ether_addr(mac->san_addr)) {
		rtnl_lock();
		err = dev_addr_del(dev, mac->san_addr, NETDEV_HW_ADDR_T_SAN);
		rtnl_unlock();
	}
	return err;
}

#endif /* (HAVE_NETDEV_STORAGE_ADDRESS) && defined(NETDEV_HW_ADDR_T_SAN) */

static int ixgbe_mdio_read(struct net_device *netdev, int prtad, int devad,
			   u16 addr)
{
	struct ixgbe_adapter *adapter = netdev_priv(netdev);
	struct ixgbe_hw *hw = &adapter->hw;
	u16 value;
	int rc;

	if (prtad != hw->phy.addr)
		return -EINVAL;

	if (!hw->phy.ops.read_reg)
		return -EOPNOTSUPP;

	rc = hw->phy.ops.read_reg(hw, addr, devad, &value);
	if (!rc)
		rc = value;

	return rc;
}

static int ixgbe_mdio_write(struct net_device *netdev, int prtad, int devad,
			    u16 addr, u16 value)
{
	struct ixgbe_adapter *adapter = netdev_priv(netdev);
	struct ixgbe_hw *hw = &adapter->hw;

	if (prtad != hw->phy.addr)
		return -EINVAL;

	if (!hw->phy.ops.write_reg)
		return -EOPNOTSUPP;

	return hw->phy.ops.write_reg(hw, addr, devad, value);
}

static int ixgbe_mii_ioctl(struct net_device *netdev, struct ifreq *ifr,
			   int cmd)
{
	struct mii_ioctl_data *mii = (struct mii_ioctl_data *) &ifr->ifr_data;
	int prtad, devad, ret;

	prtad = (mii->phy_id & MDIO_PHY_ID_PRTAD) >> 5;
	devad = (mii->phy_id & MDIO_PHY_ID_DEVAD);

	if (cmd == SIOCGMIIREG) {
		ret = ixgbe_mdio_read(netdev, prtad, devad, mii->reg_num);
		if (ret < 0)
			return ret;
		mii->val_out = ret;
		return 0;
	} else {
		return ixgbe_mdio_write(netdev, prtad, devad, mii->reg_num,
					mii->val_in);
	}
}

static int ixgbe_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
{
#ifdef HAVE_PTP_1588_CLOCK
	struct ixgbe_adapter *adapter = netdev_priv(netdev);

#endif
	switch (cmd) {
#ifdef HAVE_PTP_1588_CLOCK
#ifdef SIOCGHWTSTAMP
	case SIOCGHWTSTAMP:
		return ixgbe_ptp_get_ts_config(adapter, ifr);
#endif
	case SIOCSHWTSTAMP:
		return ixgbe_ptp_set_ts_config(adapter, ifr);
#endif
#ifdef ETHTOOL_OPS_COMPAT
	case SIOCETHTOOL:
		return ethtool_ioctl(ifr);
#endif
	case SIOCGMIIREG:
	case SIOCSMIIREG:
		return ixgbe_mii_ioctl(netdev, ifr, cmd);
	default:
		return -EOPNOTSUPP;
	}
}

#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 ixgbe_netpoll(struct net_device *netdev)
{
	struct ixgbe_adapter *adapter = netdev_priv(netdev);

	/* if interface is down do nothing */
	if (test_bit(__IXGBE_DOWN, &adapter->state))
		return;

	if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
		int i;
		for (i = 0; i < adapter->num_q_vectors; i++) {
			adapter->q_vector[i]->netpoll_rx = true;
			ixgbe_msix_clean_rings(0, adapter->q_vector[i]);
			adapter->q_vector[i]->netpoll_rx = false;
		}
	} else {
		ixgbe_intr(0, adapter);
	}
}
#endif /* CONFIG_NET_POLL_CONTROLLER */

/* ixgbe_validate_rtr - verify 802.1Qp to Rx packet buffer mapping is valid.
 * @adapter: pointer to ixgbe_adapter
 * @tc: number of traffic classes currently enabled
 *
 * Configure a valid 802.1Qp to Rx packet buffer mapping ie confirm
 * 802.1Q priority maps to a packet buffer that exists.
 */
static void ixgbe_validate_rtr(struct ixgbe_adapter *adapter, u8 tc)
{
	struct ixgbe_hw *hw = &adapter->hw;
	u32 reg, rsave;
	int i;

	/* 82598 have a static priority to TC mapping that can not
	 * be changed so no validation is needed.
	 */
	if (hw->mac.type == ixgbe_mac_82598EB)
		return;

	reg = IXGBE_READ_REG(hw, IXGBE_RTRUP2TC);
	rsave = reg;

	for (i = 0; i < IXGBE_DCB_MAX_TRAFFIC_CLASS; i++) {
		u8 up2tc = reg >> (i * IXGBE_RTRUP2TC_UP_SHIFT);

		/* If up2tc is out of bounds default to zero */
		if (up2tc > tc)
			reg &= ~(0x7 << IXGBE_RTRUP2TC_UP_SHIFT);
	}

	if (reg != rsave)
		IXGBE_WRITE_REG(hw, IXGBE_RTRUP2TC, reg);

	return;
}

/**
 * ixgbe_set_prio_tc_map - Configure netdev prio tc map
 * @adapter: Pointer to adapter struct
 *
 * Populate the netdev user priority to tc map
 */
static void ixgbe_set_prio_tc_map(struct ixgbe_adapter __maybe_unused *adapter)
{
#ifdef HAVE_DCBNL_IEEE
	struct net_device *dev = adapter->netdev;
	struct ixgbe_dcb_config *dcb_cfg = &adapter->dcb_cfg;
	struct ieee_ets *ets = adapter->ixgbe_ieee_ets;
	u8 prio;

	for (prio = 0; prio < IXGBE_DCB_MAX_USER_PRIORITY; prio++) {
		u8 tc = 0;

		if (adapter->dcbx_cap & DCB_CAP_DCBX_VER_CEE)
			tc = ixgbe_dcb_get_tc_from_up(dcb_cfg, 0, prio);
		else if (ets)
			tc = ets->prio_tc[prio];

		netdev_set_prio_tc_map(dev, prio, tc);
	}
#endif
}

#ifdef NETIF_F_HW_TC
#ifdef TC_MQPRIO_HW_OFFLOAD_MAX
static int ixgbe_setup_tc_mqprio(struct net_device *dev,
				 struct tc_mqprio_qopt *mqprio)
{
	mqprio->hw = TC_MQPRIO_HW_OFFLOAD_TCS;
	return ixgbe_setup_tc(dev, mqprio->num_tc);
}

#endif
#if defined(HAVE_NDO_SETUP_TC_REMOVE_TC_TO_NETDEV)
static int
__ixgbe_setup_tc(struct net_device *dev, enum tc_setup_type type,
		 void *type_data)
#elif defined(HAVE_NDO_SETUP_TC_CHAIN_INDEX)
static int
__ixgbe_setup_tc(struct net_device *dev, __always_unused u32 handle,
		 u32 chain_index, __always_unused __be16 proto,
		 struct tc_to_netdev *tc)
#else
static int
__ixgbe_setup_tc(struct net_device *dev, __always_unused u32 handle,
		 __always_unused __be16 proto, struct tc_to_netdev *tc)
#endif
{
#ifndef HAVE_NDO_SETUP_TC_REMOVE_TC_TO_NETDEV
	unsigned int type = tc->type;

#ifdef HAVE_NDO_SETUP_TC_CHAIN_INDEX
	if (chain_index)
		return -EOPNOTSUPP;

#endif
#endif
	switch (type) {
	case TC_SETUP_QDISC_MQPRIO:
#if defined(HAVE_NDO_SETUP_TC_REMOVE_TC_TO_NETDEV)
		return ixgbe_setup_tc_mqprio(dev, type_data);
#elif defined(TC_MQPRIO_HW_OFFLOAD_MAX)
		return ixgbe_setup_tc_mqprio(dev, tc->mqprio);
#else
		return ixgbe_setup_tc(dev, tc->tc);
#endif
	default:
		return -EOPNOTSUPP;
	}
}

#endif /* NETIF_F_HW_TC */
/**
 * ixgbe_setup_tc - routine to configure net_device for multiple traffic
 * classes.
 *
 * @netdev: net device to configure
 * @tc: number of traffic classes to enable
 */
int ixgbe_setup_tc(struct net_device *dev, u8 tc)
{
	struct ixgbe_adapter *adapter = netdev_priv(dev);
	struct ixgbe_hw *hw = &adapter->hw;

	/* Hardware supports up to 8 traffic classes */
	if (tc > adapter->dcb_cfg.num_tcs.pg_tcs)
		return -EINVAL;

	if (tc && hw->mac.type == ixgbe_mac_82598EB &&
	    tc < IXGBE_DCB_MAX_TRAFFIC_CLASS)
		return -EINVAL;

	/* Hardware has to reinitialize queues and interrupts to
	 * match packet buffer alignment. Unfortunately, the
	 * hardware is not flexible enough to do this dynamically.
	 */
	if (netif_running(dev))
		ixgbe_close(dev);
	else
		ixgbe_reset(adapter);

	ixgbe_clear_interrupt_scheme(adapter);

	if (tc) {
		netdev_set_num_tc(dev, tc);
		ixgbe_set_prio_tc_map(adapter);

		adapter->flags |= IXGBE_FLAG_DCB_ENABLED;

		if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
			adapter->last_lfc_mode = adapter->hw.fc.requested_mode;
			adapter->hw.fc.requested_mode = ixgbe_fc_none;
		}
	} else {
		netdev_reset_tc(dev);

		if (adapter->hw.mac.type == ixgbe_mac_82598EB)
			adapter->hw.fc.requested_mode = adapter->last_lfc_mode;

		adapter->flags &= ~IXGBE_FLAG_DCB_ENABLED;

		adapter->temp_dcb_cfg.pfc_mode_enable = false;
		adapter->dcb_cfg.pfc_mode_enable = false;
	}

	ixgbe_validate_rtr(adapter, tc);

	ixgbe_init_interrupt_scheme(adapter);
	if (netif_running(dev))
		ixgbe_open(dev);

	return 0;
}

#ifdef CONFIG_PCI_IOV
void ixgbe_sriov_reinit(struct ixgbe_adapter *adapter)
{
	struct net_device *netdev = adapter->netdev;

	rtnl_lock();
	ixgbe_setup_tc(netdev, netdev_get_num_tc(netdev));
	rtnl_unlock();
}
#endif

void ixgbe_do_reset(struct net_device *netdev)
{
	struct ixgbe_adapter *adapter = netdev_priv(netdev);

	if (netif_running(netdev))
		ixgbe_reinit_locked(adapter);
	else
		ixgbe_reset(adapter);
}

#ifdef HAVE_NDO_SET_FEATURES
#ifdef HAVE_RHEL6_NET_DEVICE_OPS_EXT
static u32 ixgbe_fix_features(struct net_device *netdev, u32 features)
#else
static netdev_features_t ixgbe_fix_features(struct net_device *netdev,
					    netdev_features_t features)
#endif
{
	struct ixgbe_adapter *adapter = netdev_priv(netdev);

#if IS_ENABLED(CONFIG_DCB)
	if (adapter->flags & IXGBE_FLAG_DCB_ENABLED)
#ifdef NETIF_F_HW_VLAN_CTAG_RX
		features |= NETIF_F_HW_VLAN_CTAG_RX;
#else
		features |= NETIF_F_HW_VLAN_RX;
#endif
#endif /* CONFIG_DCB */

	/* If Rx checksum is disabled, then RSC/LRO should also be disabled */
	if (!(features & NETIF_F_RXCSUM))
		features &= ~NETIF_F_LRO;

	/* Turn off LRO if not RSC capable */
	if (!(adapter->flags2 & IXGBE_FLAG2_RSC_CAPABLE))
		features &= ~NETIF_F_LRO;

	return features;
}

#ifdef HAVE_RHEL6_NET_DEVICE_OPS_EXT
static int ixgbe_set_features(struct net_device *netdev, u32 features)
#else
static int ixgbe_set_features(struct net_device *netdev,
			      netdev_features_t features)
#endif
{
	struct ixgbe_adapter *adapter = netdev_priv(netdev);
	bool need_reset = false;
	netdev_features_t changed = netdev->features ^ features;

	/* Make sure RSC matches LRO, reset if change */
	if (!(features & NETIF_F_LRO)) {
		if (adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED)
			need_reset = true;
		adapter->flags2 &= ~IXGBE_FLAG2_RSC_ENABLED;
	} else if ((adapter->flags2 & IXGBE_FLAG2_RSC_CAPABLE) &&
		   !(adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED)) {
		if (adapter->rx_itr_setting == 1 ||
		    adapter->rx_itr_setting > IXGBE_MIN_RSC_ITR) {
			adapter->flags2 |= IXGBE_FLAG2_RSC_ENABLED;
			need_reset = true;
		} else if (changed & NETIF_F_LRO) {
			e_info(probe, "rx-usecs set too low, "
			       "disabling RSC\n");
		}
	}

	/*
	 * Check if Flow Director n-tuple support was enabled or disabled.  If
	 * the state changed, we need to reset.
	 */
	switch (features & NETIF_F_NTUPLE) {
	case NETIF_F_NTUPLE:
		/* turn off ATR, enable perfect filters and reset */
		if (!(adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE))
			need_reset = true;

		adapter->flags &= ~IXGBE_FLAG_FDIR_HASH_CAPABLE;
		adapter->flags |= IXGBE_FLAG_FDIR_PERFECT_CAPABLE;
		break;
	default:
		/* turn off perfect filters, enable ATR and reset */
		if (adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE)
			need_reset = true;

		adapter->flags &= ~IXGBE_FLAG_FDIR_PERFECT_CAPABLE;

		/* We cannot enable ATR if VMDq is enabled */
		if (adapter->flags & IXGBE_FLAG_VMDQ_ENABLED)
			break;

		/* We cannot enable ATR if we have 2 or more traffic classes */
		if (netdev_get_num_tc(netdev) > 1)
			break;

		/* We cannot enable ATR if RSS is disabled */
		if (adapter->ring_feature[RING_F_RSS].limit <= 1)
			break;

		/* A sample rate of 0 indicates ATR disabled */
		if (!adapter->atr_sample_rate)
			break;

		adapter->flags |= IXGBE_FLAG_FDIR_HASH_CAPABLE;
		break;
	}

	netdev->features = features;

#if defined(HAVE_UDP_ENC_RX_OFFLOAD) || defined(HAVE_VXLAN_RX_OFFLOAD)
	if (adapter->flags & IXGBE_FLAG_VXLAN_OFFLOAD_CAPABLE &&
	    features & NETIF_F_RXCSUM) {
		if (!need_reset)
			adapter->flags2 |= IXGBE_FLAG2_UDP_TUN_REREG_NEEDED;
	} else {
		u32 port_mask = IXGBE_VXLANCTRL_VXLAN_UDPPORT_MASK;

		ixgbe_clear_udp_tunnel_port(adapter, port_mask);
	}
#endif /* HAVE_UDP_ENC_RX_OFFLOAD || HAVE_VXLAN_RX_OFFLOAD */

#ifdef HAVE_UDP_ENC_RX_OFFLOAD
	if (adapter->flags & IXGBE_FLAG_GENEVE_OFFLOAD_CAPABLE &&
	    features & NETIF_F_RXCSUM) {
		if (!need_reset)
			adapter->flags2 |= IXGBE_FLAG2_UDP_TUN_REREG_NEEDED;
	} else {
		u32 port_mask = IXGBE_VXLANCTRL_GENEVE_UDPPORT_MASK;

		ixgbe_clear_udp_tunnel_port(adapter, port_mask);
	}
#endif /* HAVE_UDP_ENC_RX_OFFLOAD */
	if (need_reset)
		ixgbe_do_reset(netdev);
#ifdef NETIF_F_HW_VLAN_CTAG_FILTER
	else if (changed & (NETIF_F_HW_VLAN_CTAG_RX |
			    NETIF_F_HW_VLAN_CTAG_FILTER))
		ixgbe_set_rx_mode(netdev);
#endif
#ifdef NETIF_F_HW_VLAN_FILTER
	else if (changed & (NETIF_F_HW_VLAN_RX |
			    NETIF_F_HW_VLAN_FILTER))
		ixgbe_set_rx_mode(netdev);
#endif
	return 0;

}
#endif /* HAVE_NDO_SET_FEATURES */

#ifdef HAVE_UDP_ENC_RX_OFFLOAD
/**
 * ixgbe_add_udp_tunnel_port - Get notifications about adding UDP tunnel ports
 * @dev: The port's netdev
 * @ti: Tunnel endpoint information
 **/
static void ixgbe_add_udp_tunnel_port(struct net_device *dev,
				      struct udp_tunnel_info *ti)
{
	struct ixgbe_adapter *adapter = netdev_priv(dev);
	struct ixgbe_hw *hw = &adapter->hw;
	__be16 port = ti->port;
	u32 port_shift = 0;
	u32 reg;

	if (ti->sa_family != AF_INET)
		return;

	switch (ti->type) {
	case UDP_TUNNEL_TYPE_VXLAN:
		if (!(adapter->flags & IXGBE_FLAG_VXLAN_OFFLOAD_CAPABLE))
			return;

		if (adapter->vxlan_port == port)
			return;

		if (adapter->vxlan_port) {
			netdev_info(dev,
				    "VXLAN port %d set, not adding port %d\n",
				    ntohs(adapter->vxlan_port),
				    ntohs(port));
			return;
		}

		adapter->vxlan_port = port;
		break;
	case UDP_TUNNEL_TYPE_GENEVE:
		if (!(adapter->flags & IXGBE_FLAG_GENEVE_OFFLOAD_CAPABLE))
			return;

		if (adapter->geneve_port == port)
			return;

		if (adapter->geneve_port) {
			netdev_info(dev,
				    "GENEVE port %d set, not adding port %d\n",
				    ntohs(adapter->geneve_port),
				    ntohs(port));
			return;
		}

		port_shift = IXGBE_VXLANCTRL_GENEVE_UDPPORT_SHIFT;
		adapter->geneve_port = port;
		break;
	default:
		return;
	}

	reg = IXGBE_READ_REG(hw, IXGBE_VXLANCTRL) | ntohs(port) << port_shift;
	IXGBE_WRITE_REG(hw, IXGBE_VXLANCTRL, reg);
}

/**
 * ixgbe_del_udp_tunnel_port - Get notifications about removing UDP tunnel ports
 * @dev: The port's netdev
 * @ti: Tunnel endpoint information
 **/
static void ixgbe_del_udp_tunnel_port(struct net_device *dev,
				      struct udp_tunnel_info *ti)
{
	struct ixgbe_adapter *adapter = netdev_priv(dev);
	u32 port_mask;

	if (ti->type != UDP_TUNNEL_TYPE_VXLAN &&
	    ti->type != UDP_TUNNEL_TYPE_GENEVE)
		return;

	if (ti->sa_family != AF_INET)
		return;

	switch (ti->type) {
	case UDP_TUNNEL_TYPE_VXLAN:
		if (!(adapter->flags & IXGBE_FLAG_VXLAN_OFFLOAD_CAPABLE))
			return;

		if (adapter->vxlan_port != ti->port) {
			netdev_info(dev, "VXLAN port %d not found\n",
				    ntohs(ti->port));
			return;
		}

		port_mask = IXGBE_VXLANCTRL_VXLAN_UDPPORT_MASK;
		break;
	case UDP_TUNNEL_TYPE_GENEVE:
		if (!(adapter->flags & IXGBE_FLAG_GENEVE_OFFLOAD_CAPABLE))
			return;

		if (adapter->geneve_port != ti->port) {
			netdev_info(dev, "GENEVE port %d not found\n",
				    ntohs(ti->port));
			return;
		}

		port_mask = IXGBE_VXLANCTRL_GENEVE_UDPPORT_MASK;
		break;
	default:
		return;
	}

	ixgbe_clear_udp_tunnel_port(adapter, port_mask);
	adapter->flags2 |= IXGBE_FLAG2_UDP_TUN_REREG_NEEDED;
}
#elif defined(HAVE_VXLAN_RX_OFFLOAD)
/**
 * ixgbe_add_vxlan_port - Get notifications about VXLAN ports that come up
 * @dev: The port's netdev
 * @sa_family: Socket Family that VXLAN is notifiying us about
 * @port: New UDP port number that VXLAN started listening to
 * @type: Enumerated type specifying UDP tunnel type
 */
static void ixgbe_add_vxlan_port(struct net_device *dev, sa_family_t sa_family,
				 __be16 port)
{
	struct ixgbe_adapter *adapter = netdev_priv(dev);
	struct ixgbe_hw *hw = &adapter->hw;

	if (sa_family != AF_INET)
		return;

	if (!(adapter->flags & IXGBE_FLAG_VXLAN_OFFLOAD_ENABLE))
		return;

	if (adapter->vxlan_port == port)
		return;

	if (adapter->vxlan_port) {
		netdev_info(dev,
			    "Hit Max num of VXLAN ports, not adding port %d\n",
			    ntohs(port));
		return;
	}

	adapter->vxlan_port = port;
	IXGBE_WRITE_REG(hw, IXGBE_VXLANCTRL, ntohs(port));
}

/**
 * ixgbe_del_vxlan_port - Get notifications about VXLAN ports that go away
 * @dev: The port's netdev
 * @sa_family: Socket Family that VXLAN is notifying us about
 * @port: UDP port number that VXLAN stopped listening to
 * @type: Enumerated type specifying UDP tunnel type
 */
static void ixgbe_del_vxlan_port(struct net_device *dev, sa_family_t sa_family,
				 __be16 port)
{
	struct ixgbe_adapter *adapter = netdev_priv(dev);

	if (!(adapter->flags & IXGBE_FLAG_VXLAN_OFFLOAD_ENABLE))
		return;

	if (sa_family != AF_INET)
		return;

	if (adapter->vxlan_port != port) {
		netdev_info(dev, "Port %d was not found, not deleting\n",
			    ntohs(port));
		return;
	}

	ixgbe_clear_udp_tunnel_port(adapter, IXGBE_VXLANCTRL_ALL_UDPPORT_MASK);
	adapter->flags2 |= IXGBE_FLAG2_UDP_TUN_REREG_NEEDED;
}
#endif /* HAVE_VXLAN_RX_OFFLOAD */

#ifdef HAVE_NDO_GSO_CHECK
static bool
ixgbe_gso_check(struct sk_buff *skb, __always_unused struct net_device *dev)
{
	return vxlan_gso_check(skb);
}
#endif /* HAVE_NDO_GSO_CHECK */

#ifdef HAVE_FDB_OPS
#ifdef USE_CONST_DEV_UC_CHAR
static int ixgbe_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
			     u16 flags)
#else
static int ixgbe_ndo_fdb_add(struct ndmsg *ndm,
			     struct net_device *dev,
			     unsigned char *addr,
			     u16 flags)
#endif /* USE_CONST_DEV_UC_CHAR */
{
	/* guarantee we can provide a unique filter for the unicast address */
	if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr)) {
		struct ixgbe_adapter *adapter = netdev_priv(dev);
		u16 pool = VMDQ_P(0);

		if (netdev_uc_count(dev) >= ixgbe_available_rars(adapter, pool))
			return -ENOMEM;
	}

#ifdef USE_CONST_DEV_UC_CHAR
#ifdef HAVE_NDO_FDB_ADD_VID
	return ndo_dflt_fdb_add(ndm, tb, dev, addr, vid, flags);
#else
	return ndo_dflt_fdb_add(ndm, tb, dev, addr, flags);
#endif /* HAVE_NDO_FDB_ADD_VID */
#else
	return ndo_dflt_fdb_add(ndm, dev, addr, flags);
#endif /* USE_CONST_DEV_UC_CHAR */
}

#ifdef HAVE_BRIDGE_ATTRIBS
#ifdef HAVE_NDO_BRIDGE_SET_DEL_LINK_FLAGS
static int ixgbe_ndo_bridge_setlink(struct net_device *dev,
				    struct nlmsghdr *nlh,
				    __always_unused u16 flags)
#else
static int ixgbe_ndo_bridge_setlink(struct net_device *dev,
				    struct nlmsghdr *nlh)
#endif /* HAVE_NDO_BRIDGE_SET_DEL_LINK_FLAGS */
{
	struct ixgbe_adapter *adapter = netdev_priv(dev);
	struct nlattr *attr, *br_spec;
	int rem;

	if (!(adapter->flags & IXGBE_FLAG_SRIOV_ENABLED))
		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) {
			adapter->flags |= IXGBE_FLAG_SRIOV_VEPA_BRIDGE_MODE;
		} else if (mode == BRIDGE_MODE_VEB) {
			adapter->flags &= ~IXGBE_FLAG_SRIOV_VEPA_BRIDGE_MODE;
		} else {
			return -EINVAL;
		}

		adapter->bridge_mode = mode;

		/* re-configure settings related to bridge mode */
		ixgbe_configure_bridge_mode(adapter);

		e_info(drv, "enabling bridge mode: %s\n",
			mode == BRIDGE_MODE_VEPA ? "VEPA" : "VEB");
	}

	return 0;
}

#ifdef HAVE_NDO_BRIDGE_GETLINK_NLFLAGS
static int ixgbe_ndo_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
				    struct net_device *dev,
				    u32 __maybe_unused filter_mask,
				    int nlflags)
#elif defined(HAVE_BRIDGE_FILTER)
static int ixgbe_ndo_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
				    struct net_device *dev,
				    u32 __always_unused filter_mask)
#else
static int ixgbe_ndo_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
				    struct net_device *dev)
#endif /* HAVE_NDO_BRIDGE_GETLINK_NLFLAGS */
{
	struct ixgbe_adapter *adapter = netdev_priv(dev);
	u16 mode;

	if (!(adapter->flags & IXGBE_FLAG_SRIOV_ENABLED))
		return 0;

	mode = adapter->bridge_mode;
#ifdef HAVE_NDO_DFLT_BRIDGE_GETLINK_VLAN_SUPPORT
	return ndo_dflt_bridge_getlink(skb, pid, seq, dev, mode, 0, 0, nlflags,
				       filter_mask, NULL);
#elif defined(HAVE_NDO_BRIDGE_GETLINK_NLFLAGS)
	return ndo_dflt_bridge_getlink(skb, pid, seq, dev, mode, 0, 0, nlflags);
#elif defined(HAVE_NDO_FDB_ADD_VID) || \
      defined NDO_DFLT_BRIDGE_GETLINK_HAS_BRFLAGS
	return ndo_dflt_bridge_getlink(skb, pid, seq, dev, mode, 0, 0);
#else
	return ndo_dflt_bridge_getlink(skb, pid, seq, dev, mode);
#endif /* HAVE_NDO_BRIDGE_GETLINK_NLFLAGS */
}
#endif /* HAVE_BRIDGE_ATTRIBS */
#endif /* HAVE_FDB_OPS */

#ifdef HAVE_NDO_FEATURES_CHECK
#define IXGBE_MAX_TUNNEL_HDR_LEN 80
#ifdef NETIF_F_GSO_PARTIAL
#define IXGBE_MAX_MAC_HDR_LEN		127
#define IXGBE_MAX_NETWORK_HDR_LEN	511

static netdev_features_t
ixgbe_features_check(struct sk_buff *skb, struct net_device *dev,
		     netdev_features_t features)
{
	unsigned int network_hdr_len, mac_hdr_len;

	/* Make certain the headers can be described by a context descriptor */
	mac_hdr_len = skb_network_header(skb) - skb->data;
	if (unlikely(mac_hdr_len > IXGBE_MAX_MAC_HDR_LEN))
		return features & ~(NETIF_F_HW_CSUM |
				    NETIF_F_SCTP_CRC |
				    NETIF_F_HW_VLAN_CTAG_TX |
				    NETIF_F_TSO |
				    NETIF_F_TSO6);

	network_hdr_len = skb_checksum_start(skb) - skb_network_header(skb);
	if (unlikely(network_hdr_len >  IXGBE_MAX_NETWORK_HDR_LEN))
		return features & ~(NETIF_F_HW_CSUM |
				    NETIF_F_SCTP_CRC |
				    NETIF_F_TSO |
				    NETIF_F_TSO6);

	/* We can only support IPV4 TSO in tunnels if we can mangle the
	 * inner IP ID field, so strip TSO if MANGLEID is not supported.
	 */
	if (skb->encapsulation && !(features & NETIF_F_TSO_MANGLEID))
		features &= ~NETIF_F_TSO;

	return features;
}
#else
static netdev_features_t
ixgbe_features_check(struct sk_buff *skb, struct net_device *dev,
		     netdev_features_t features)
{
	if (!skb->encapsulation)
		return features;

	if (unlikely(skb_inner_mac_header(skb) - skb_transport_header(skb) >
		     IXGBE_MAX_TUNNEL_HDR_LEN))
		return features & ~NETIF_F_CSUM_MASK;

	return features;
}
#endif /* NETIF_F_GSO_PARTIAL */
#endif /* HAVE_NDO_FEATURES_CHECK */

#ifdef HAVE_NET_DEVICE_OPS
static const struct net_device_ops ixgbe_netdev_ops = {
	.ndo_open		= ixgbe_open,
	.ndo_stop		= ixgbe_close,
	.ndo_start_xmit		= ixgbe_xmit_frame,
#ifdef HAVE_NETDEV_SELECT_QUEUE
#if IS_ENABLED(CONFIG_FCOE)
	.ndo_select_queue	= ixgbe_select_queue,
#else
#ifndef HAVE_MQPRIO
	.ndo_select_queue	= __netdev_pick_tx,
#endif
#endif /* CONFIG_FCOE */
#endif /* HAVE_NETDEV_SELECT_QUEUE */
	.ndo_set_rx_mode	= ixgbe_set_rx_mode,
	.ndo_validate_addr	= eth_validate_addr,
	.ndo_set_mac_address	= ixgbe_set_mac,
	.ndo_change_mtu		= ixgbe_change_mtu,
	.ndo_tx_timeout		= ixgbe_tx_timeout,
#if defined(NETIF_F_HW_VLAN_TX) || defined(NETIF_F_HW_VLAN_CTAG_TX)
	.ndo_vlan_rx_add_vid	= ixgbe_vlan_rx_add_vid,
	.ndo_vlan_rx_kill_vid	= ixgbe_vlan_rx_kill_vid,
#endif
	.ndo_do_ioctl		= ixgbe_ioctl,
#ifdef HAVE_RHEL7_NET_DEVICE_OPS_EXT
/* RHEL7 requires this to be defined to enable extended ops.  RHEL7 uses the
 * function get_ndo_ext to retrieve offsets for extended fields from with the
 * net_device_ops struct and ndo_size is checked to determine whether or not
 * the offset is valid.
 */
	.ndo_size		= sizeof(const struct net_device_ops),
#endif
#ifdef IFLA_VF_MAX
	.ndo_set_vf_mac		= ixgbe_ndo_set_vf_mac,
#ifdef HAVE_RHEL7_NETDEV_OPS_EXT_NDO_SET_VF_VLAN
	.extended.ndo_set_vf_vlan = ixgbe_ndo_set_vf_vlan,
#else
	.ndo_set_vf_vlan	= ixgbe_ndo_set_vf_vlan,
#endif
#ifdef HAVE_NDO_SET_VF_MIN_MAX_TX_RATE
	.ndo_set_vf_rate	= ixgbe_ndo_set_vf_bw,
#else
	.ndo_set_vf_tx_rate	= ixgbe_ndo_set_vf_bw,
#endif /* HAVE_NDO_SET_VF_MIN_MAX_TX_RATE */
#if defined(HAVE_VF_SPOOFCHK_CONFIGURE) && IS_ENABLED(CONFIG_PCI_IOV)
	.ndo_set_vf_spoofchk	= ixgbe_ndo_set_vf_spoofchk,
#endif
#ifdef HAVE_NDO_SET_VF_RSS_QUERY_EN
	.ndo_set_vf_rss_query_en = ixgbe_ndo_set_vf_rss_query_en,
#endif
#ifdef HAVE_NDO_SET_VF_TRUST
#ifdef HAVE_RHEL7_NET_DEVICE_OPS_EXT
	.extended.ndo_set_vf_trust = ixgbe_ndo_set_vf_trust,
#else
	.ndo_set_vf_trust	= ixgbe_ndo_set_vf_trust,
#endif /* HAVE_RHEL7_NET_DEVICE_OPS_EXT */
#endif /* HAVE_NDO_SET_VF_TRUST */
	.ndo_get_vf_config	= ixgbe_ndo_get_vf_config,
#endif /* IFLA_VF_MAX */
#ifdef HAVE_NDO_GET_STATS64
	.ndo_get_stats64	= ixgbe_get_stats64,
#else
	.ndo_get_stats		= ixgbe_get_stats,
#endif /* HAVE_NDO_GET_STATS64 */
#ifdef HAVE_SETUP_TC
#ifdef NETIF_F_HW_TC
	.ndo_setup_tc		= __ixgbe_setup_tc,
#else
	.ndo_setup_tc		= ixgbe_setup_tc,
#endif /* NETIF_F_HW_TC */
#endif
#ifdef CONFIG_NET_POLL_CONTROLLER
	.ndo_poll_controller	= ixgbe_netpoll,
#endif
#ifndef HAVE_RHEL6_NET_DEVICE_EXTENDED
#ifdef HAVE_NDO_BUSY_POLL
	.ndo_busy_poll		= ixgbe_busy_poll_recv,
#endif /* HAVE_NDO_BUSY_POLL */
#endif /* !HAVE_RHEL6_NET_DEVICE_EXTENDED */
#if IS_ENABLED(CONFIG_FCOE)
	.ndo_fcoe_ddp_setup = ixgbe_fcoe_ddp_get,
#ifdef HAVE_NETDEV_OPS_FCOE_DDP_TARGET
	.ndo_fcoe_ddp_target = ixgbe_fcoe_ddp_target,
#endif
	.ndo_fcoe_ddp_done = ixgbe_fcoe_ddp_put,
#ifdef HAVE_NETDEV_OPS_FCOE_ENABLE
	.ndo_fcoe_enable = ixgbe_fcoe_enable,
	.ndo_fcoe_disable = ixgbe_fcoe_disable,
#endif
#ifdef HAVE_NETDEV_OPS_FCOE_GETWWN
	.ndo_fcoe_get_wwn = ixgbe_fcoe_get_wwn,
#endif
#endif /* CONFIG_FCOE */
#ifdef HAVE_VLAN_RX_REGISTER
	.ndo_vlan_rx_register	= &ixgbe_vlan_mode,
#endif
#ifdef HAVE_FDB_OPS
	.ndo_fdb_add		= ixgbe_ndo_fdb_add,
#ifndef USE_DEFAULT_FDB_DEL_DUMP
	.ndo_fdb_del		= ndo_dflt_fdb_del,
	.ndo_fdb_dump		= ndo_dflt_fdb_dump,
#endif
#ifdef HAVE_BRIDGE_ATTRIBS
	.ndo_bridge_setlink	= ixgbe_ndo_bridge_setlink,
	.ndo_bridge_getlink	= ixgbe_ndo_bridge_getlink,
#endif /* HAVE_BRIDGE_ATTRIBS */
#endif
#ifdef HAVE_UDP_ENC_RX_OFFLOAD
#ifdef HAVE_RHEL7_NETDEV_OPS_EXT_NDO_UDP_TUNNEL
	.extended.ndo_udp_tunnel_add = ixgbe_add_udp_tunnel_port,
	.extended.ndo_udp_tunnel_del = ixgbe_del_udp_tunnel_port,
#else
	.ndo_udp_tunnel_add	= ixgbe_add_udp_tunnel_port,
	.ndo_udp_tunnel_del	= ixgbe_del_udp_tunnel_port,
#endif
#elif defined(HAVE_VXLAN_RX_OFFLOAD)
	.ndo_add_vxlan_port	= ixgbe_add_vxlan_port,
	.ndo_del_vxlan_port	= ixgbe_del_vxlan_port,
#endif /* HAVE_UDP_ENC_RX_OFFLOAD */
#ifdef HAVE_NDO_GSO_CHECK
	.ndo_gso_check		= ixgbe_gso_check,
#endif /* HAVE_NDO_GSO_CHECK */
#ifdef HAVE_NDO_FEATURES_CHECK
	.ndo_features_check	= ixgbe_features_check,
#endif /* HAVE_NDO_FEATURES_CHECK */
#ifdef HAVE_RHEL6_NET_DEVICE_OPS_EXT
};

/* RHEL6 keeps these operations in a separate structure */
static const struct net_device_ops_ext ixgbe_netdev_ops_ext = {
	.size = sizeof(struct net_device_ops_ext),
#endif /* HAVE_RHEL6_NET_DEVICE_OPS_EXT */
#ifdef HAVE_NDO_SET_FEATURES
	.ndo_set_features = ixgbe_set_features,
	.ndo_fix_features = ixgbe_fix_features,
#endif /* HAVE_NDO_SET_FEATURES */
};
#endif /* HAVE_NET_DEVICE_OPS */

void ixgbe_assign_netdev_ops(struct net_device *dev)
{
#ifdef HAVE_NET_DEVICE_OPS
	dev->netdev_ops = &ixgbe_netdev_ops;
#ifdef HAVE_RHEL6_NET_DEVICE_OPS_EXT
	set_netdev_ops_ext(dev, &ixgbe_netdev_ops_ext);
#endif /* HAVE_RHEL6_NET_DEVICE_OPS_EXT */
#else /* HAVE_NET_DEVICE_OPS */
	dev->open = &ixgbe_open;
	dev->stop = &ixgbe_close;
	dev->hard_start_xmit = &ixgbe_xmit_frame;
	dev->get_stats = &ixgbe_get_stats;
#ifdef HAVE_SET_RX_MODE
	dev->set_rx_mode = &ixgbe_set_rx_mode;
#endif
	dev->set_multicast_list = &ixgbe_set_rx_mode;
	dev->set_mac_address = &ixgbe_set_mac;
	dev->change_mtu = &ixgbe_change_mtu;
	dev->do_ioctl = &ixgbe_ioctl;
#ifdef HAVE_TX_TIMEOUT
	dev->tx_timeout = &ixgbe_tx_timeout;
#endif
#if defined(NETIF_F_HW_VLAN_TX) || defined(NETIF_F_HW_VLAN_CTAG_TX)
	dev->vlan_rx_register = &ixgbe_vlan_mode;
	dev->vlan_rx_add_vid = &ixgbe_vlan_rx_add_vid;
	dev->vlan_rx_kill_vid = &ixgbe_vlan_rx_kill_vid;
#endif
#ifdef CONFIG_NET_POLL_CONTROLLER
	dev->poll_controller = &ixgbe_netpoll;
#endif
#ifdef HAVE_NETDEV_SELECT_QUEUE
#if IS_ENABLED(CONFIG_FCOE)
	dev->select_queue = &ixgbe_select_queue;
#else
	dev->select_queue = &__netdev_pick_tx;
#endif
#endif /* HAVE_NETDEV_SELECT_QUEUE */
#endif /* HAVE_NET_DEVICE_OPS */

#ifdef HAVE_RHEL6_NET_DEVICE_EXTENDED
#ifdef HAVE_NDO_BUSY_POLL
	netdev_extended(dev)->ndo_busy_poll		= ixgbe_busy_poll_recv;
#endif /* HAVE_NDO_BUSY_POLL */
#endif /* HAVE_RHEL6_NET_DEVICE_EXTENDED */

	ixgbe_set_ethtool_ops(dev);
	dev->watchdog_timeo = 5 * HZ;
}

/**
 * ixgbe_wol_supported - Check whether device supports WoL
 * @adapter: the adapter private structure
 * @device_id: the device ID
 * @subdev_id: the subsystem device ID
 *
 * This function is used by probe and ethtool to determine
 * which devices have WoL support
 *
 **/
bool ixgbe_wol_supported(struct ixgbe_adapter *adapter, u16 device_id,
			 u16 subdevice_id)
{
	struct ixgbe_hw *hw = &adapter->hw;
	u16 wol_cap = adapter->eeprom_cap & IXGBE_DEVICE_CAPS_WOL_MASK;

	/* WOL not supported on 82598 */
	if (hw->mac.type == ixgbe_mac_82598EB)
		return false;

	/* check eeprom to see if WOL is enabled for X540 and newer */
	if (hw->mac.type >= ixgbe_mac_X540) {
		if ((wol_cap == IXGBE_DEVICE_CAPS_WOL_PORT0_1) ||
		    ((wol_cap == IXGBE_DEVICE_CAPS_WOL_PORT0) &&
		     (hw->bus.func == 0)))
			return true;
	}

	/* WOL is determined based on device IDs for 82599 MACs */
	switch (device_id) {
	case IXGBE_DEV_ID_82599_SFP:
		/* Only these subdevices could supports WOL */
		switch (subdevice_id) {
		case IXGBE_SUBDEV_ID_82599_560FLR:
		case IXGBE_SUBDEV_ID_82599_LOM_SNAP6:
		case IXGBE_SUBDEV_ID_82599_SFP_WOL0:
		case IXGBE_SUBDEV_ID_82599_SFP_2OCP:
			/* only support first port */
			if (hw->bus.func != 0)
				break;
			/* fall through */
		case IXGBE_SUBDEV_ID_82599_SP_560FLR:
		case IXGBE_SUBDEV_ID_82599_SFP:
		case IXGBE_SUBDEV_ID_82599_RNDC:
		case IXGBE_SUBDEV_ID_82599_ECNA_DP:
		case IXGBE_SUBDEV_ID_82599_SFP_1OCP:
		case IXGBE_SUBDEV_ID_82599_SFP_LOM_OEM1:
		case IXGBE_SUBDEV_ID_82599_SFP_LOM_OEM2:
			return true;
		}
		break;
	case IXGBE_DEV_ID_82599EN_SFP:
		/* Only these subdevices support WoL */
		switch (subdevice_id) {
		case IXGBE_SUBDEV_ID_82599EN_SFP_OCP1:
			return true;
		}
		break;
	case IXGBE_DEV_ID_82599_COMBO_BACKPLANE:
		/* All except this subdevice support WOL */
		if (subdevice_id != IXGBE_SUBDEV_ID_82599_KX4_KR_MEZZ)
			return true;
		break;
	case IXGBE_DEV_ID_82599_KX4:
		return  true;
	default:
		break;
	}

	return false;
}

/**
 * ixgbe_set_fw_version - Set FW version
 * @adapter: the adapter private structure
 *
 * This function is used by probe and ethtool to determine the FW version to
 * format to display. The FW version is taken from the EEPROM/NVM.
 *
 **/
static void ixgbe_set_fw_version(struct ixgbe_adapter *adapter)
{
	struct ixgbe_hw *hw = &adapter->hw;
	u16 eeprom_verh = 0, eeprom_verl = 0;
	u16 offset = 0;
	u32 etrack_id;

	/* Check for OEM Product Version block format */
	hw->eeprom.ops.read(hw, 0x1b, &offset);

	/* Make sure offset to OEM Product Version block is valid */
	if (!(offset == 0x0) && !(offset == 0xffff)) {
		u16 mod_len = 0, cap = 0, prod_ver = 0, rel_num = 0;
		u16 build, major, patch;

		/* Read product version block */
		hw->eeprom.ops.read(hw, offset, &mod_len);
		hw->eeprom.ops.read(hw, offset + 0x1, &cap);
		hw->eeprom.ops.read(hw, offset + 0x2, &prod_ver);
		hw->eeprom.ops.read(hw, offset + 0x3, &rel_num);

		/* Only display OEM product version if valid block */
		if (mod_len == 0x3 && (cap & 0xf) == 0x0) {
			major = prod_ver >> 8;
			build = prod_ver & 0xff;
			patch = rel_num;

			snprintf(adapter->eeprom_id, sizeof(adapter->eeprom_id),
				 "%x.%x.%x", major, build, patch);
			return;
		}
	}

	/*
	 * Save off EEPROM version number and Option Rom version which
	 * together make a unique identify for the eeprom
	 */
	hw->eeprom.ops.read(hw, 0x2e, &eeprom_verh);
	hw->eeprom.ops.read(hw, 0x2d, &eeprom_verl);
	etrack_id = (eeprom_verh << 16) | eeprom_verl;

	/* Check for SCSI block version format */
	hw->eeprom.ops.read(hw, 0x17, &offset);

	/* Make sure offset to SCSI block is valid */
	if (!(offset == 0x0) && !(offset == 0xffff)) {
		u16 eeprom_cfg_blkh = 0, eeprom_cfg_blkl = 0;
		u16 build, major, patch;

		hw->eeprom.ops.read(hw, offset + 0x84, &eeprom_cfg_blkh);
		hw->eeprom.ops.read(hw, offset + 0x83, &eeprom_cfg_blkl);

		/* Only display Option Rom if exist */
		if (eeprom_cfg_blkl && eeprom_cfg_blkh) {
			major = eeprom_cfg_blkl >> 8;
			build = (eeprom_cfg_blkl << 8) | (eeprom_cfg_blkh >> 8);
			patch = eeprom_cfg_blkh & 0x00ff;

			snprintf(adapter->eeprom_id, sizeof(adapter->eeprom_id),
				 "0x%08x, %d.%d.%d", etrack_id, major, build,
				 patch);
			return;
		}
	}

	/* Set ETrack ID format */
	snprintf(adapter->eeprom_id, sizeof(adapter->eeprom_id),
		 "0x%08x", etrack_id);
}

/**
 * ixgbe_probe - Device Initialization Routine
 * @pdev: PCI device information struct
 * @ent: entry in ixgbe_pci_tbl
 *
 * Returns 0 on success, negative on failure
 *
 * ixgbe_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 ixgbe_probe(struct pci_dev *pdev,
				 const struct pci_device_id __always_unused *ent)
{
	struct net_device *netdev;
	struct ixgbe_adapter *adapter = NULL;
	struct ixgbe_hw *hw = NULL;
	static int cards_found;
	int err, pci_using_dac, expected_gts;
	char *info_string, *i_s_var;
	u8 part_str[IXGBE_PBANUM_LENGTH];
	enum ixgbe_mac_type mac_type = ixgbe_mac_unknown;
#ifdef HAVE_TX_MQ
	unsigned int indices = MAX_TX_QUEUES;
#endif /* HAVE_TX_MQ */
	bool disable_dev = false;
#if IS_ENABLED(CONFIG_FCOE)
	u16 device_caps;
#endif
#ifndef NETIF_F_GSO_PARTIAL
#ifdef HAVE_NDO_SET_FEATURES
#ifndef HAVE_RHEL6_NET_DEVICE_OPS_EXT
	netdev_features_t hw_features;
#else
	u32 hw_features;
#endif
#endif
#endif /* NETIF_F_GSO_PARTIAL */

	err = pci_enable_device_mem(pdev);
	if (err)
		return err;

	if (!dma_set_mask(pci_dev_to_dev(pdev), DMA_BIT_MASK(64)) &&
	    !dma_set_coherent_mask(pci_dev_to_dev(pdev), DMA_BIT_MASK(64))) {
		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) {
				dev_err(pci_dev_to_dev(pdev), "No usable DMA "
					"configuration, aborting\n");
				goto err_dma;
			}
		}
		pci_using_dac = 0;
	}

	err = pci_request_mem_regions(pdev, ixgbe_driver_name);
	if (err) {
		dev_err(pci_dev_to_dev(pdev),
			"pci_request_selected_regions failed 0x%x\n", err);
		goto err_pci_reg;
	}

	/*
	 * The mac_type is needed before we have the adapter is  set up
	 * so rather than maintain two devID -> MAC tables we dummy up
	 * an ixgbe_hw stuct and use ixgbe_set_mac_type.
	 */
	hw = vmalloc(sizeof(struct ixgbe_hw));
	if (!hw) {
		pr_info("Unable to allocate memory for early mac "
			"check\n");
	} else {
		hw->vendor_id = pdev->vendor;
		hw->device_id = pdev->device;
		ixgbe_set_mac_type(hw);
		mac_type = hw->mac.type;
		vfree(hw);
	}

	/*
	 * Workaround of Silicon errata on 82598. Disable LOs in the PCI switch
	 * port to which the 82598 is connected to prevent duplicate
	 * completions caused by LOs.  We need the mac type so that we only
	 * do this on 82598 devices, ixgbe_set_mac_type does this for us if
	 * we set it's device ID.
	 */
	if (mac_type == ixgbe_mac_82598EB)
		pci_disable_link_state(pdev, PCIE_LINK_STATE_L0S);

	pci_enable_pcie_error_reporting(pdev);

	pci_set_master(pdev);

#ifdef HAVE_TX_MQ
	if (mac_type == ixgbe_mac_82598EB) {
#if IS_ENABLED(CONFIG_DCB)
		indices = IXGBE_MAX_DCB_INDICES * 4;
#else /* CONFIG_DCB */
		indices = IXGBE_MAX_RSS_INDICES;
#endif /* !CONFIG_DCB */
	}

	netdev = alloc_etherdev_mq(sizeof(struct ixgbe_adapter), indices);
#else /* HAVE_TX_MQ */
	netdev = alloc_etherdev(sizeof(struct ixgbe_adapter));
#endif /* HAVE_TX_MQ */
	if (!netdev) {
		err = -ENOMEM;
		goto err_alloc_etherdev;
	}

	SET_MODULE_OWNER(netdev);
	SET_NETDEV_DEV(netdev, pci_dev_to_dev(pdev));

	adapter = netdev_priv(netdev);
#ifdef HAVE_TX_MQ
#ifndef HAVE_NETDEV_SELECT_QUEUE
	adapter->indices = indices;
#endif
#endif
	adapter->netdev = netdev;
	adapter->pdev = pdev;
	hw = &adapter->hw;
	hw->back = adapter;
	adapter->msg_enable = (1 << DEFAULT_DEBUG_LEVEL_SHIFT) - 1;

	hw->hw_addr = ioremap(pci_resource_start(pdev, 0),
			      pci_resource_len(pdev, 0));
	adapter->io_addr = hw->hw_addr;
	if (!hw->hw_addr) {
		err = -EIO;
		goto err_ioremap;
	}

	ixgbe_assign_netdev_ops(netdev);

	strncpy(netdev->name, pci_name(pdev), sizeof(netdev->name) - 1);

	adapter->bd_number = cards_found;

	ixgbe_get_hw_control(adapter);
	/* setup the private structure */
	err = ixgbe_sw_init(adapter);
	if (err)
		goto err_sw_init;

	/* Make sure the SWFW semaphore is in a valid state */
	if (hw->mac.ops.init_swfw_sync)
		hw->mac.ops.init_swfw_sync(hw);

	/* Make it possible the adapter to be woken up via WOL */
	switch (adapter->hw.mac.type) {
	case ixgbe_mac_82599EB:
	case ixgbe_mac_X540:
	case ixgbe_mac_X550:
	case ixgbe_mac_X550EM_x:
	case ixgbe_mac_X550EM_a:
		IXGBE_WRITE_REG(&adapter->hw, IXGBE_WUS, ~0);
		break;
	default:
		break;
	}

	/*
	 * If we have a fan, this is as early we know, warn if we
	 * have had a failure.
	 */
	if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE) {
		u32 esdp = IXGBE_READ_REG(hw, IXGBE_ESDP);
		if (esdp & IXGBE_ESDP_SDP1)
			e_crit(probe, "Fan has stopped, replace the adapter\n");
	}

	/*
	 * check_options must be called before setup_link to set up
	 * hw->fc completely
	 */
	ixgbe_check_options(adapter);

	/* reset_hw fills in the perm_addr as well */
	hw->phy.reset_if_overtemp = true;
	err = hw->mac.ops.reset_hw(hw);
	hw->phy.reset_if_overtemp = false;
	if (err == IXGBE_ERR_SFP_NOT_PRESENT) {
		err = IXGBE_SUCCESS;
	} else if (err == IXGBE_ERR_SFP_NOT_SUPPORTED) {
		e_dev_err("failed to load because an unsupported SFP+ or QSFP "
			  "module type was detected.\n");
		e_dev_err("Reload the driver after installing a supported "
			  "module.\n");
		goto err_sw_init;
	} else if (err) {
		e_dev_err("HW Init failed: %d\n", err);
		goto err_sw_init;
	}

#ifdef CONFIG_PCI_IOV
#if defined(HAVE_SRIOV_CONFIGURE) || defined(HAVE_RHEL6_SRIOV_CONFIGURE)
	if (adapter->max_vfs > 0) {
		e_dev_warn("Enabling SR-IOV VFs using the max_vfs module parameter is deprecated.\n");
		e_dev_warn("Please use the pci sysfs interface instead. Ex:\n");
		e_dev_warn("echo '%d' > /sys/bus/pci/devices/%04x:%02x:%02x.%1x/sriov_numvfs\n",
			   adapter->max_vfs,
			   pci_domain_nr(pdev->bus),
			   pdev->bus->number,
			   PCI_SLOT(pdev->devfn),
			   PCI_FUNC(pdev->devfn)
			   );
	}

#endif
	if (adapter->flags & IXGBE_FLAG_SRIOV_CAPABLE) {
		pci_sriov_set_totalvfs(pdev, IXGBE_MAX_VFS_DRV_LIMIT);
		ixgbe_enable_sriov(adapter);
	}

#endif /* CONFIG_PCI_IOV */

#ifdef NETIF_F_GSO_PARTIAL
	netdev->features = NETIF_F_SG |
			   NETIF_F_TSO |
			   NETIF_F_TSO6 |
			   NETIF_F_RXHASH |
			   NETIF_F_RXCSUM |
			   NETIF_F_HW_CSUM;

	netdev->gso_partial_features = IXGBE_GSO_PARTIAL_FEATURES;
	netdev->features |= NETIF_F_GSO_PARTIAL |
			    IXGBE_GSO_PARTIAL_FEATURES;

	if (hw->mac.type >= ixgbe_mac_82599EB)
		netdev->features |= NETIF_F_SCTP_CRC;

	/* copy netdev features into list of user selectable features */
	netdev->hw_features |= netdev->features |
			       NETIF_F_HW_VLAN_CTAG_FILTER |
			       NETIF_F_HW_VLAN_CTAG_RX |
			       NETIF_F_HW_VLAN_CTAG_TX |
			       NETIF_F_RXALL;

	if (hw->mac.type >= ixgbe_mac_82599EB)
		netdev->hw_features |= NETIF_F_NTUPLE |
				       NETIF_F_HW_TC;

	if (pci_using_dac)
		netdev->features |= NETIF_F_HIGHDMA;

	netdev->vlan_features |= netdev->features | NETIF_F_TSO_MANGLEID;
	netdev->hw_enc_features |= netdev->vlan_features;
	netdev->mpls_features |= NETIF_F_HW_CSUM;

	/* set this bit last since it cannot be part of vlan_features */
	netdev->features |= NETIF_F_HW_VLAN_CTAG_FILTER |
			    NETIF_F_HW_VLAN_CTAG_RX |
			    NETIF_F_HW_VLAN_CTAG_TX;

	netdev->priv_flags |= IFF_UNICAST_FLT;
	netdev->priv_flags |= IFF_SUPP_NOFCS;

	/* give us the option of enabling RSC/LRO later */
	if (adapter->flags2 & IXGBE_FLAG2_RSC_CAPABLE)
		netdev->hw_features |= NETIF_F_LRO;

#else	/* NETIF_F_GSO_PARTIAL */
	netdev->features |= NETIF_F_SG |
			    NETIF_F_IP_CSUM;

#ifdef NETIF_F_IPV6_CSUM
	netdev->features |= NETIF_F_IPV6_CSUM;
#endif

#ifdef NETIF_F_HW_VLAN_CTAG_TX
	netdev->features |= NETIF_F_HW_VLAN_CTAG_TX |
			    NETIF_F_HW_VLAN_CTAG_FILTER |
			    NETIF_F_HW_VLAN_CTAG_RX;
#endif

#ifdef NETIF_F_HW_VLAN_TX
	netdev->features |= NETIF_F_HW_VLAN_TX |
			    NETIF_F_HW_VLAN_FILTER |
			    NETIF_F_HW_VLAN_RX;
#endif
	netdev->features |= ixgbe_tso_features();
#ifdef NETIF_F_RXHASH
	netdev->features |= NETIF_F_RXHASH;
#endif /* NETIF_F_RXHASH */
	netdev->features |= NETIF_F_RXCSUM;

#ifdef HAVE_NDO_SET_FEATURES
	/* copy netdev features into list of user selectable features */
#ifndef HAVE_RHEL6_NET_DEVICE_OPS_EXT
	hw_features = netdev->hw_features;
#else
	hw_features = get_netdev_hw_features(netdev);
#endif
	hw_features |= netdev->features;

	/* give us the option of enabling RSC/LRO later */
	if (adapter->flags2 & IXGBE_FLAG2_RSC_CAPABLE)
		hw_features |= NETIF_F_LRO;

#else
#ifdef NETIF_F_GRO

	/* this is only needed on kernels prior to 2.6.39 */
	netdev->features |= NETIF_F_GRO;
#endif /* NETIF_F_GRO */
#endif /* HAVE_NDO_SET_FEATURES */

	switch (adapter->hw.mac.type) {
	case ixgbe_mac_82599EB:
	case ixgbe_mac_X540:
	case ixgbe_mac_X550:
	case ixgbe_mac_X550EM_x:
	case ixgbe_mac_X550EM_a:
		netdev->features |= NETIF_F_SCTP_CSUM;
#ifdef HAVE_NDO_SET_FEATURES
		hw_features |= NETIF_F_SCTP_CSUM |
				       NETIF_F_NTUPLE;
#endif
		break;
	default:
		break;
	}
#ifdef HAVE_NDO_SET_FEATURES
#ifdef HAVE_RHEL6_NET_DEVICE_OPS_EXT
	set_netdev_hw_features(netdev, hw_features);
#else
	netdev->hw_features = hw_features;
#endif
#endif

#ifdef HAVE_NETDEV_VLAN_FEATURES
	netdev->vlan_features |= NETIF_F_SG |
				 NETIF_F_IP_CSUM |
				 NETIF_F_IPV6_CSUM |
				 NETIF_F_TSO |
				 NETIF_F_TSO6;

#endif /* HAVE_NETDEV_VLAN_FEATURES */
#ifdef HAVE_ENCAP_CSUM_OFFLOAD
	netdev->hw_enc_features |= NETIF_F_SG;
#endif /* HAVE_ENCAP_CSUM_OFFLOAD */
#ifdef HAVE_VXLAN_RX_OFFLOAD
	if (adapter->flags & IXGBE_FLAG_VXLAN_OFFLOAD_CAPABLE) {
		netdev->hw_enc_features |= NETIF_F_IP_CSUM |
					   NETIF_F_IPV6_CSUM;
	}
#endif /* NETIF_F_GSO_PARTIAL */

#endif /* HAVE_VXLAN_RX_OFFLOAD */
	if (netdev->features & NETIF_F_LRO) {
		if ((adapter->flags2 & IXGBE_FLAG2_RSC_CAPABLE) &&
		    ((adapter->rx_itr_setting == 1) ||
		     (adapter->rx_itr_setting > IXGBE_MIN_RSC_ITR))) {
			adapter->flags2 |= IXGBE_FLAG2_RSC_ENABLED;
		} else if (adapter->flags2 & IXGBE_FLAG2_RSC_CAPABLE) {
			e_dev_info("InterruptThrottleRate set too high, "
				   "disabling RSC\n");
		}
	}
#ifdef IFF_UNICAST_FLT
	netdev->priv_flags |= IFF_UNICAST_FLT;
#endif
#ifdef IFF_SUPP_NOFCS
	netdev->priv_flags |= IFF_SUPP_NOFCS;
#endif

#ifdef HAVE_NETDEVICE_MIN_MAX_MTU
	/* MTU range: 68 - 9710 */
	netdev->min_mtu = ETH_MIN_MTU;
	netdev->max_mtu = IXGBE_MAX_JUMBO_FRAME_SIZE - (ETH_HLEN + ETH_FCS_LEN);

#endif
#if IS_ENABLED(CONFIG_DCB)
	if (adapter->flags & IXGBE_FLAG_DCB_CAPABLE)
		netdev->dcbnl_ops = &ixgbe_dcbnl_ops;

#endif /* CONFIG_DCB */
#if IS_ENABLED(CONFIG_FCOE)
#ifdef NETIF_F_FSO
	if (adapter->flags & IXGBE_FLAG_FCOE_CAPABLE) {
		unsigned int fcoe_l;

		hw->mac.ops.get_device_caps(hw, &device_caps);
		if (device_caps & IXGBE_DEVICE_CAPS_FCOE_OFFLOADS) {
			adapter->flags &= ~IXGBE_FLAG_FCOE_ENABLED;
			adapter->flags &= ~IXGBE_FLAG_FCOE_CAPABLE;
			e_dev_info("FCoE offload feature is not available. "
				   "Disabling FCoE offload feature\n");
		} else {
			netdev->features |= NETIF_F_FSO |
					    NETIF_F_FCOE_CRC;
#ifndef HAVE_NETDEV_OPS_FCOE_ENABLE
			ixgbe_fcoe_ddp_enable(adapter);
			adapter->flags |= IXGBE_FLAG_FCOE_ENABLED;
			netdev->features |= NETIF_F_FCOE_MTU;
#endif /* HAVE_NETDEV_OPS_FCOE_ENABLE */
		}

		fcoe_l = min_t(int, IXGBE_FCRETA_SIZE, num_online_cpus());
		adapter->ring_feature[RING_F_FCOE].limit = fcoe_l;

#ifdef HAVE_NETDEV_VLAN_FEATURES
		netdev->vlan_features |= NETIF_F_FSO |
					 NETIF_F_FCOE_CRC |
					 NETIF_F_FCOE_MTU;
#endif /* HAVE_NETDEV_VLAN_FEATURES */
	}
#endif /* NETIF_F_FSO */
#endif /* CONFIG_FCOE */
	if (pci_using_dac) {
		netdev->features |= NETIF_F_HIGHDMA;
#ifdef HAVE_NETDEV_VLAN_FEATURES
		netdev->vlan_features |= NETIF_F_HIGHDMA;
#endif /* HAVE_NETDEV_VLAN_FEATURES */
	}

	/* make sure the EEPROM is good */
	if (hw->eeprom.ops.validate_checksum &&
	    (hw->eeprom.ops.validate_checksum(hw, NULL) < 0)) {
		e_dev_err("The EEPROM Checksum Is Not Valid\n");
		err = -EIO;
		goto err_sw_init;
	}

	memcpy(netdev->dev_addr, hw->mac.perm_addr, netdev->addr_len);
#ifdef ETHTOOL_GPERMADDR
	memcpy(netdev->perm_addr, hw->mac.perm_addr, netdev->addr_len);
#endif

	if (!is_valid_ether_addr(netdev->dev_addr)) {
		e_dev_err("invalid MAC address\n");
		err = -EIO;
		goto err_sw_init;
	}

	/* Set hw->mac.addr to permanent MAC address */
	ether_addr_copy(hw->mac.addr, hw->mac.perm_addr);
	ixgbe_mac_set_default_filter(adapter);

	timer_setup(&adapter->service_timer, ixgbe_service_timer, 0);

	if (IXGBE_REMOVED(hw->hw_addr)) {
		err = -EIO;
		goto err_sw_init;
	}
	INIT_WORK(&adapter->service_task, ixgbe_service_task);
	set_bit(__IXGBE_SERVICE_INITED, &adapter->state);
	clear_bit(__IXGBE_SERVICE_SCHED, &adapter->state);

	err = ixgbe_init_interrupt_scheme(adapter);
	if (err)
		goto err_sw_init;

	/* WOL not supported for all devices */
	adapter->wol = 0;
	hw->eeprom.ops.read(hw, 0x2c, &adapter->eeprom_cap);
	if (ixgbe_wol_supported(adapter, pdev->device, pdev->subsystem_device))
		adapter->wol = IXGBE_WUFC_MAG;

	hw->wol_enabled = !!(adapter->wol);

	device_set_wakeup_enable(pci_dev_to_dev(adapter->pdev), adapter->wol);

	ixgbe_set_fw_version(adapter);

	/* reset the hardware with the new settings */
	err = hw->mac.ops.start_hw(hw);
	if (err == IXGBE_ERR_EEPROM_VERSION) {
		/* We are running on a pre-production device, log a warning */
		e_dev_warn("This device is a pre-production adapter/LOM. "
			   "Please be aware there may be issues associated "
			   "with your hardware.  If you are experiencing "
			   "problems please contact your Intel or hardware "
			   "representative who provided you with this "
			   "hardware.\n");
	} else if (err == IXGBE_ERR_OVERTEMP) {
		e_crit(drv, "%s\n", ixgbe_overheat_msg);
		goto err_register;
	} else if (err) {
		e_dev_err("HW init failed\n");
		goto err_register;
	}

	/* pick up the PCI bus settings for reporting later */
	if (ixgbe_pcie_from_parent(hw))
		ixgbe_get_parent_bus_info(hw);
	else
		if (hw->mac.ops.get_bus_info)
			hw->mac.ops.get_bus_info(hw);

	strcpy(netdev->name, "eth%d");
	err = register_netdev(netdev);
	if (err)
		goto err_register;

	pci_set_drvdata(pdev, adapter);
	adapter->netdev_registered = true;
#ifdef HAVE_PCI_ERS
	/*
	 * call save state here in standalone driver because it relies on
	 * adapter struct to exist, and needs to call netdev_priv
	 */
	pci_save_state(pdev);

#endif

	/* power down the optics for 82599 SFP+ fiber */
	if (hw->mac.ops.disable_tx_laser)
		hw->mac.ops.disable_tx_laser(hw);

	/* carrier off reporting is important to ethtool even BEFORE open */
	netif_carrier_off(netdev);
	/* keep stopping all the transmit queues for older kernels */
	netif_tx_stop_all_queues(netdev);

#if IS_ENABLED(CONFIG_DCA)
	if (adapter->flags & IXGBE_FLAG_DCA_CAPABLE) {
		err = dca_add_requester(pci_dev_to_dev(pdev));
		switch (err) {
		case IXGBE_SUCCESS:
			adapter->flags |= IXGBE_FLAG_DCA_ENABLED;
			ixgbe_setup_dca(adapter);
			break;
		/* -19 is returned from the kernel when no provider is found */
		case -19:
			e_info(rx_err, "No DCA provider found. Please "
			       "start ioatdma for DCA functionality.\n");
			break;
		default:
			e_info(probe, "DCA registration failed: %d\n", err);
			break;
		}
	}
#endif

	/* print all messages at the end so that we use our eth%d name */

	/* calculate the expected PCIe bandwidth required for optimal
	 * performance. Note that some older parts will never have enough
	 * bandwidth due to being older generation PCIe parts. We clamp these
	 * parts to ensure that no warning is displayed, as this could confuse
	 * users otherwise. */
	switch(hw->mac.type) {
	case ixgbe_mac_82598EB:
		expected_gts = min(ixgbe_enumerate_functions(adapter) * 10, 16);
		break;
	default:
		expected_gts = ixgbe_enumerate_functions(adapter) * 10;
		break;
	}

	/* don't check link if we failed to enumerate functions */
	if (expected_gts > 0)
		ixgbe_check_minimum_link(adapter, expected_gts);

	/* First try to read PBA as a string */
	err = ixgbe_read_pba_string(hw, part_str, IXGBE_PBANUM_LENGTH);
	if (err)
		strncpy(part_str, "Unknown", IXGBE_PBANUM_LENGTH);
	if (ixgbe_is_sfp(hw) && hw->phy.sfp_type != ixgbe_sfp_type_not_present)
		e_info(probe, "MAC: %d, PHY: %d, SFP+: %d, PBA No: %s\n",
		       hw->mac.type, hw->phy.type, hw->phy.sfp_type, part_str);
	else
		e_info(probe, "MAC: %d, PHY: %d, PBA No: %s\n",
		      hw->mac.type, hw->phy.type, part_str);

	e_dev_info("%02x:%02x:%02x:%02x:%02x:%02x\n",
		   netdev->dev_addr[0], netdev->dev_addr[1],
		   netdev->dev_addr[2], netdev->dev_addr[3],
		   netdev->dev_addr[4], netdev->dev_addr[5]);

#define INFO_STRING_LEN 255
	info_string = kzalloc(INFO_STRING_LEN, GFP_KERNEL);
	if (!info_string) {
		e_err(probe, "allocation for info string failed\n");
		goto no_info_string;
	}
	i_s_var = info_string;
	i_s_var += sprintf(info_string, "Enabled Features: ");
	i_s_var += sprintf(i_s_var, "RxQ: %d TxQ: %d ",
			   adapter->num_rx_queues, adapter->num_tx_queues);
#if IS_ENABLED(CONFIG_FCOE)
	if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED)
		i_s_var += sprintf(i_s_var, "FCoE ");
#endif
	if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE)
		i_s_var += sprintf(i_s_var, "FdirHash ");
	if (adapter->flags & IXGBE_FLAG_DCB_ENABLED)
		i_s_var += sprintf(i_s_var, "DCB ");
	if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
		i_s_var += sprintf(i_s_var, "DCA ");
	if (adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED)
		i_s_var += sprintf(i_s_var, "RSC ");
	if (adapter->flags & IXGBE_FLAG_VXLAN_OFFLOAD_ENABLE)
		i_s_var += sprintf(i_s_var, "vxlan_rx ");

	BUG_ON(i_s_var > (info_string + INFO_STRING_LEN));
	/* end features printing */
	e_info(probe, "%s\n", info_string);
	kfree(info_string);
no_info_string:
#ifdef CONFIG_PCI_IOV
	if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) {
		int i;
		for (i = 0; i < adapter->num_vfs; i++)
			ixgbe_vf_configuration(pdev, (i | 0x10000000));
	}
#endif

	/* Initialize the LED link active for LED blink support */
	if (hw->mac.ops.init_led_link_act)
		hw->mac.ops.init_led_link_act(hw);

	/* firmware requires blank numerical version */
	if (hw->mac.ops.set_fw_drv_ver)
		hw->mac.ops.set_fw_drv_ver(hw, 0xFF, 0xFF, 0xFF, 0xFF,
					   sizeof(ixgbe_driver_version) - 1,
					   ixgbe_driver_version);

#if defined(HAVE_NETDEV_STORAGE_ADDRESS) && defined(NETDEV_HW_ADDR_T_SAN)
	/* add san mac addr to netdev */
	ixgbe_add_sanmac_netdev(netdev);

#endif /* (HAVE_NETDEV_STORAGE_ADDRESS) && (NETDEV_HW_ADDR_T_SAN) */
	e_info(probe, "Intel(R) 10 Gigabit Network Connection\n");
	cards_found++;

#ifdef IXGBE_SYSFS
	if (ixgbe_sysfs_init(adapter))
		e_err(probe, "failed to allocate sysfs resources\n");
#else
#ifdef IXGBE_PROCFS
	if (ixgbe_procfs_init(adapter))
		e_err(probe, "failed to allocate procfs resources\n");
#endif /* IXGBE_PROCFS */
#endif /* IXGBE_SYSFS */
#ifdef HAVE_IXGBE_DEBUG_FS

	ixgbe_dbg_adapter_init(adapter);
#endif /* HAVE_IXGBE_DEBUG_FS */

	/* setup link for SFP devices with MNG FW, else wait for IXGBE_UP */
	if (ixgbe_mng_enabled(hw) && ixgbe_is_sfp(hw) && hw->mac.ops.setup_link)
		hw->mac.ops.setup_link(hw,
			IXGBE_LINK_SPEED_10GB_FULL | IXGBE_LINK_SPEED_1GB_FULL,
			true);

	if (hw->mac.ops.setup_eee &&
	    (adapter->flags2 & IXGBE_FLAG2_EEE_CAPABLE)) {
		bool eee_enable = !!(adapter->flags2 & IXGBE_FLAG2_EEE_ENABLED);

		hw->mac.ops.setup_eee(hw, eee_enable);
	}

	return 0;

err_register:
	ixgbe_clear_interrupt_scheme(adapter);
err_sw_init:
	ixgbe_release_hw_control(adapter);
#ifdef CONFIG_PCI_IOV
	ixgbe_disable_sriov(adapter);
#endif /* CONFIG_PCI_IOV */
	adapter->flags2 &= ~IXGBE_FLAG2_SEARCH_FOR_SFP;
	kfree(adapter->mac_table);
	kfree(adapter->rss_key);
	iounmap(adapter->io_addr);
err_ioremap:
	disable_dev = !test_and_set_bit(__IXGBE_DISABLED, &adapter->state);
	free_netdev(netdev);
err_alloc_etherdev:
	pci_release_mem_regions(pdev);
err_pci_reg:
err_dma:
	if (!adapter || disable_dev)
		pci_disable_device(pdev);
	return err;
}

/**
 * ixgbe_remove - Device Removal Routine
 * @pdev: PCI device information struct
 *
 * ixgbe_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 ixgbe_remove(struct pci_dev *pdev)
{
	struct ixgbe_adapter *adapter = pci_get_drvdata(pdev);
	struct net_device *netdev;
	bool disable_dev;

	/* if !adapter then we already cleaned up in probe */
	if (!adapter)
		return;

	netdev = adapter->netdev;
#ifdef HAVE_IXGBE_DEBUG_FS
	ixgbe_dbg_adapter_exit(adapter);

#endif /*HAVE_IXGBE_DEBUG_FS */
	set_bit(__IXGBE_REMOVE, &adapter->state);
	cancel_work_sync(&adapter->service_task);

#if IS_ENABLED(CONFIG_DCA)
	if (adapter->flags & IXGBE_FLAG_DCA_ENABLED) {
		adapter->flags &= ~IXGBE_FLAG_DCA_ENABLED;
		dca_remove_requester(pci_dev_to_dev(pdev));
		IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_CTRL,
				IXGBE_DCA_CTRL_DCA_DISABLE);
	}
#endif /* CONFIG_DCA */

#ifdef IXGBE_SYSFS
	ixgbe_sysfs_exit(adapter);
#else
#ifdef IXGBE_PROCFS
	ixgbe_procfs_exit(adapter);
#endif /* IXGBE_PROCFS */
#endif /* IXGBE-SYSFS */

#if defined(HAVE_NETDEV_STORAGE_ADDRESS) && defined(NETDEV_HW_ADDR_T_SAN)
	/* remove the added san mac */
	ixgbe_del_sanmac_netdev(netdev);

#endif /* (HAVE_NETDEV_STORAGE_ADDRESS) && (NETDEV_HW_ADDR_T_SAN) */

#ifdef CONFIG_PCI_IOV
	ixgbe_disable_sriov(adapter);
#endif /* CONFIG_PCI_IOV */
	if (adapter->netdev_registered) {
		unregister_netdev(netdev);
		adapter->netdev_registered = false;
	}

#if IS_ENABLED(CONFIG_FCOE)
#ifndef HAVE_NETDEV_OPS_FCOE_ENABLE
	ixgbe_fcoe_ddp_disable(adapter);
#endif
#endif /* CONFIG_FCOE */
	ixgbe_clear_interrupt_scheme(adapter);
	ixgbe_release_hw_control(adapter);

#ifdef HAVE_DCBNL_IEEE
	kfree(adapter->ixgbe_ieee_pfc);
	kfree(adapter->ixgbe_ieee_ets);

#endif
	iounmap(adapter->io_addr);
	pci_release_mem_regions(pdev);

	kfree(adapter->mac_table);
	kfree(adapter->rss_key);
	disable_dev = !test_and_set_bit(__IXGBE_DISABLED, &adapter->state);
	free_netdev(netdev);

	pci_disable_pcie_error_reporting(pdev);

	if (disable_dev)
		pci_disable_device(pdev);

}

static bool ixgbe_check_cfg_remove(struct ixgbe_hw *hw, struct pci_dev *pdev)
{
	u16 value;

	pci_read_config_word(pdev, PCI_VENDOR_ID, &value);
	if (value == IXGBE_FAILED_READ_CFG_WORD) {
		ixgbe_remove_adapter(hw);
		return true;
	}
	return false;
}

u16 ixgbe_read_pci_cfg_word(struct ixgbe_hw *hw, u32 reg)
{
	struct ixgbe_adapter *adapter = hw->back;
	u16 value;

	if (IXGBE_REMOVED(hw->hw_addr))
		return IXGBE_FAILED_READ_CFG_WORD;
	pci_read_config_word(adapter->pdev, reg, &value);
	if (value == IXGBE_FAILED_READ_CFG_WORD &&
	    ixgbe_check_cfg_remove(hw, adapter->pdev))
		return IXGBE_FAILED_READ_CFG_WORD;
	return value;
}

#ifdef HAVE_PCI_ERS
#ifdef CONFIG_PCI_IOV
static u32 ixgbe_read_pci_cfg_dword(struct ixgbe_hw *hw, u32 reg)
{
	struct ixgbe_adapter *adapter = hw->back;
	u32 value;

	if (IXGBE_REMOVED(hw->hw_addr))
		return IXGBE_FAILED_READ_CFG_DWORD;
	pci_read_config_dword(adapter->pdev, reg, &value);
	if (value == IXGBE_FAILED_READ_CFG_DWORD &&
	    ixgbe_check_cfg_remove(hw, adapter->pdev))
		return IXGBE_FAILED_READ_CFG_DWORD;
	return value;
}
#endif /* CONFIG_PCI_IOV */
#endif /* HAVE_PCI_ERS */

void ixgbe_write_pci_cfg_word(struct ixgbe_hw *hw, u32 reg, u16 value)
{
	struct ixgbe_adapter *adapter = hw->back;

	if (IXGBE_REMOVED(hw->hw_addr))
		return;
	pci_write_config_word(adapter->pdev, reg, value);
}

void ewarn(struct ixgbe_hw *hw, const char *st)
{
	struct ixgbe_adapter *adapter = hw->back;

	netif_warn(adapter, drv, adapter->netdev,  "%s", st);
}

#ifdef HAVE_PCI_ERS
/**
 * ixgbe_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 ixgbe_io_error_detected(struct pci_dev *pdev,
						pci_channel_state_t state)
{
	struct ixgbe_adapter *adapter = pci_get_drvdata(pdev);
	struct net_device *netdev = adapter->netdev;

#ifdef CONFIG_PCI_IOV
	struct ixgbe_hw *hw = &adapter->hw;
	struct pci_dev *bdev, *vfdev;
	u32 dw0, dw1, dw2, dw3;
	int vf, pos;
	u16 req_id, pf_func;

	if (adapter->hw.mac.type == ixgbe_mac_82598EB ||
	    adapter->num_vfs == 0)
		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;

	dw0 = ixgbe_read_pci_cfg_dword(hw, pos + PCI_ERR_HEADER_LOG);
	dw1 = ixgbe_read_pci_cfg_dword(hw, pos + PCI_ERR_HEADER_LOG + 4);
	dw2 = ixgbe_read_pci_cfg_dword(hw, pos + PCI_ERR_HEADER_LOG + 8);
	dw3 = ixgbe_read_pci_cfg_dword(hw, pos + PCI_ERR_HEADER_LOG + 12);
	if (IXGBE_REMOVED(hw->hw_addr))
		goto skip_bad_vf_detection;

	req_id = dw1 >> 16;
	/* On the 82599 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)) {
		unsigned int device_id;

		vf = (req_id & 0x7F) >> 1;
		e_dev_err("VF %d has caused a PCIe error\n", vf);
		e_dev_err("TLP: dw0: %8.8x\tdw1: %8.8x\tdw2: "
				"%8.8x\tdw3: %8.8x\n",
		dw0, dw1, dw2, dw3);
		switch (adapter->hw.mac.type) {
		case ixgbe_mac_82599EB:
			device_id = IXGBE_DEV_ID_82599_VF;
			break;
		case ixgbe_mac_X540:
			device_id = IXGBE_DEV_ID_X540_VF;
			break;
		case ixgbe_mac_X550:
			device_id = IXGBE_DEV_ID_X550_VF;
			break;
		case ixgbe_mac_X550EM_x:
			device_id = IXGBE_DEV_ID_X550EM_X_VF;
			break;
		case ixgbe_mac_X550EM_a:
			device_id = IXGBE_DEV_ID_X550EM_A_VF;
			break;
		default:
			device_id = 0;
			break;
		}

		/* Find the pci device of the offending VF */
		vfdev = pci_get_device(PCI_VENDOR_ID_INTEL, device_id, NULL);
		while (vfdev) {
			if (vfdev->devfn == (req_id & 0xFF))
				break;
			vfdev = pci_get_device(PCI_VENDOR_ID_INTEL,
					       device_id, 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) {
			ixgbe_issue_vf_flr(adapter, vfdev);
			/* Free device reference count */
			pci_dev_put(vfdev);
		}

		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 */
	if (!test_bit(__IXGBE_SERVICE_INITED, &adapter->state))
		return PCI_ERS_RESULT_DISCONNECT;

	if (!netif_device_present(netdev))
		return PCI_ERS_RESULT_DISCONNECT;

	rtnl_lock();
	netif_device_detach(netdev);

	if (state == pci_channel_io_perm_failure) {
		rtnl_unlock();
		return PCI_ERS_RESULT_DISCONNECT;
	}

	if (netif_running(netdev))
		ixgbe_close_suspend(adapter);

	if (!test_and_set_bit(__IXGBE_DISABLED, &adapter->state))
		pci_disable_device(pdev);
	rtnl_unlock();

	/* Request a slot reset. */
	return PCI_ERS_RESULT_NEED_RESET;
}

/**
 * ixgbe_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.
 */
static pci_ers_result_t ixgbe_io_slot_reset(struct pci_dev *pdev)
{
	struct ixgbe_adapter *adapter = pci_get_drvdata(pdev);
	pci_ers_result_t result;

	if (pci_enable_device_mem(pdev)) {
		e_err(probe, "Cannot re-enable PCI device after reset.\n");
		result = PCI_ERS_RESULT_DISCONNECT;
	} else {
		smp_mb__before_atomic();
		clear_bit(__IXGBE_DISABLED, &adapter->state);
		adapter->hw.hw_addr = adapter->io_addr;
		pci_set_master(pdev);
		pci_restore_state(pdev);
		/*
		 * After second error pci->state_saved is false, this
		 * resets it so EEH doesn't break.
		 */
		pci_save_state(pdev);

		pci_wake_from_d3(pdev, false);

		set_bit(__IXGBE_RESET_REQUESTED, &adapter->state);
		ixgbe_service_event_schedule(adapter);

		IXGBE_WRITE_REG(&adapter->hw, IXGBE_WUS, ~0);
		result = PCI_ERS_RESULT_RECOVERED;
	}

	pci_cleanup_aer_uncorrect_error_status(pdev);

	return result;
}

/**
 * ixgbe_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.
 */
static void ixgbe_io_resume(struct pci_dev *pdev)
{
	struct ixgbe_adapter *adapter = pci_get_drvdata(pdev);
	struct net_device *netdev = adapter->netdev;

#ifdef CONFIG_PCI_IOV
	if (adapter->vferr_refcount) {
		e_info(drv, "Resuming after VF err\n");
		adapter->vferr_refcount--;
		return;
	}

#endif
	rtnl_lock();
	if (netif_running(netdev))
		ixgbe_open(netdev);

	netif_device_attach(netdev);
	rtnl_unlock();
}

#ifdef HAVE_CONST_STRUCT_PCI_ERROR_HANDLERS
static const struct pci_error_handlers ixgbe_err_handler = {
#else
static struct pci_error_handlers ixgbe_err_handler = {
#endif
	.error_detected = ixgbe_io_error_detected,
	.slot_reset = ixgbe_io_slot_reset,
	.resume = ixgbe_io_resume,
};
#endif /* HAVE_PCI_ERS */

struct net_device *ixgbe_hw_to_netdev(const struct ixgbe_hw *hw)
{
	return ((struct ixgbe_adapter *)hw->back)->netdev;
}
struct ixgbe_msg *ixgbe_hw_to_msg(const struct ixgbe_hw *hw)
{
	struct ixgbe_adapter *adapter =
		container_of(hw, struct ixgbe_adapter, hw);
	return (struct ixgbe_msg *)&adapter->msg_enable;
}

#ifdef HAVE_RHEL6_SRIOV_CONFIGURE
static struct pci_driver_rh ixgbe_driver_rh = {
	.sriov_configure = ixgbe_pci_sriov_configure,
};
#endif

#ifdef CONFIG_PM
#ifndef USE_LEGACY_PM_SUPPORT
static const struct dev_pm_ops ixgbe_pm_ops = {
	.suspend        = ixgbe_suspend,
	.resume         = ixgbe_resume,
	.freeze         = ixgbe_freeze,
	.thaw           = ixgbe_thaw,
	.poweroff       = ixgbe_suspend,
	.restore        = ixgbe_resume,
};
#endif /* USE_LEGACY_PM_SUPPORT */
#endif

static struct pci_driver ixgbe_driver = {
	.name     = ixgbe_driver_name,
	.id_table = ixgbe_pci_tbl,
	.probe    = ixgbe_probe,
	.remove   = __devexit_p(ixgbe_remove),
#ifdef CONFIG_PM
#ifndef USE_LEGACY_PM_SUPPORT
	.driver = {
		.pm = &ixgbe_pm_ops,
	},
#else
	.suspend  = ixgbe_suspend,
	.resume   = ixgbe_resume,
#endif /* USE_LEGACY_PM_SUPPORT */
#endif
#ifndef USE_REBOOT_NOTIFIER
	.shutdown = ixgbe_shutdown,
#endif
#if defined(HAVE_SRIOV_CONFIGURE)
	.sriov_configure = ixgbe_pci_sriov_configure,
#elif defined(HAVE_RHEL6_SRIOV_CONFIGURE)
	.rh_reserved = &ixgbe_driver_rh,
#endif /* HAVE_SRIOV_CONFIGURE */
#ifdef HAVE_PCI_ERS
	.err_handler = &ixgbe_err_handler
#endif
};

bool ixgbe_is_ixgbe(struct pci_dev *pcidev)
{
	if (pci_dev_driver(pcidev) != &ixgbe_driver)
		return false;
	else
		return true;
}

/**
 * ixgbe_init_module - Driver Registration Routine
 *
 * ixgbe_init_module is the first routine called when the driver is
 * loaded. All it does is register with the PCI subsystem.
 **/
static int __init ixgbe_init_module(void)
{
	int ret;
	pr_info("%s - version %s\n", ixgbe_driver_string, ixgbe_driver_version);
	pr_info("%s\n", ixgbe_copyright);

	ixgbe_wq = create_singlethread_workqueue(ixgbe_driver_name);
	if (!ixgbe_wq) {
		pr_err("%s: Failed to create workqueue\n", ixgbe_driver_name);
		return -ENOMEM;
	}

#ifdef IXGBE_PROCFS
	if (ixgbe_procfs_topdir_init())
		pr_info("Procfs failed to initialize topdir\n");
#endif

#ifdef HAVE_IXGBE_DEBUG_FS
	ixgbe_dbg_init();
#endif /* HAVE_IXGBE_DEBUG_FS */

	ret = pci_register_driver(&ixgbe_driver);
	if (ret) {
		destroy_workqueue(ixgbe_wq);
#ifdef HAVE_IXGBE_DEBUG_FS
		ixgbe_dbg_exit();
#endif /* HAVE_IXGBE_DEBUG_FS */
#ifdef IXGBE_PROCFS
		ixgbe_procfs_topdir_exit();
#endif
		return ret;
}
#if IS_ENABLED(CONFIG_DCA)

	dca_register_notify(&dca_notifier);
#endif

	return ret;
}

module_init(ixgbe_init_module);

/**
 * ixgbe_exit_module - Driver Exit Cleanup Routine
 *
 * ixgbe_exit_module is called just before the driver is removed
 * from memory.
 **/
static void __exit ixgbe_exit_module(void)
{
#if IS_ENABLED(CONFIG_DCA)
	dca_unregister_notify(&dca_notifier);
#endif
	pci_unregister_driver(&ixgbe_driver);
#ifdef IXGBE_PROCFS
	ixgbe_procfs_topdir_exit();
#endif
	destroy_workqueue(ixgbe_wq);
#ifdef HAVE_IXGBE_DEBUG_FS
	ixgbe_dbg_exit();
#endif /* HAVE_IXGBE_DEBUG_FS */
}

#if IS_ENABLED(CONFIG_DCA)
static int ixgbe_notify_dca(struct notifier_block __always_unused *nb, unsigned long event,
			    void __always_unused *p)
{
	int ret_val;

	ret_val = driver_for_each_device(&ixgbe_driver.driver, NULL, &event,
					 __ixgbe_notify_dca);

	return ret_val ? NOTIFY_BAD : NOTIFY_DONE;
}
#endif
module_exit(ixgbe_exit_module);

/* ixgbe_main.c */

