xref: /freebsd-11.0-release/sys/dev/ixgbe/if_ix.c

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

  Copyright (c) 2001-2015, Intel Corporation
  All rights reserved.

  Redistribution and use in source and binary forms, with or without
  modification, are permitted provided that the following conditions are met:

   1. Redistributions of source code must retain the above copyright notice,
      this list of conditions and the following disclaimer.

   2. Redistributions in binary form must reproduce the above copyright
      notice, this list of conditions and the following disclaimer in the
      documentation and/or other materials provided with the distribution.

   3. Neither the name of the Intel Corporation nor the names of its
      contributors may be used to endorse or promote products derived from
      this software without specific prior written permission.

  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
  LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  POSSIBILITY OF SUCH DAMAGE.

******************************************************************************/
/*$FreeBSD: head/sys/dev/ixgbe/if_ix.c 283882 2015-06-01 17:35:29Z jfv $*/


#ifndef IXGBE_STANDALONE_BUILD
#include "opt_inet.h"
#include "opt_inet6.h"
#include "opt_rss.h"
#endif

#include "ixgbe.h"

#ifdef	RSS
#include <net/rss_config.h>
#include <netinet/in_rss.h>
#endif

/*********************************************************************
 *  Set this to one to display debug statistics
 *********************************************************************/
int             ixgbe_display_debug_stats = 0;

/*********************************************************************
 *  Driver version
 *********************************************************************/
char ixgbe_driver_version[] = "2.8.3";

/*********************************************************************
 *  PCI Device ID Table
 *
 *  Used by probe to select devices to load on
 *  Last field stores an index into ixgbe_strings
 *  Last entry must be all 0s
 *
 *  { Vendor ID, Device ID, SubVendor ID, SubDevice ID, String Index }
 *********************************************************************/

static ixgbe_vendor_info_t ixgbe_vendor_info_array[] =
{
	{IXGBE_INTEL_VENDOR_ID, IXGBE_DEV_ID_82598AF_DUAL_PORT, 0, 0, 0},
	{IXGBE_INTEL_VENDOR_ID, IXGBE_DEV_ID_82598AF_SINGLE_PORT, 0, 0, 0},
	{IXGBE_INTEL_VENDOR_ID, IXGBE_DEV_ID_82598EB_CX4, 0, 0, 0},
	{IXGBE_INTEL_VENDOR_ID, IXGBE_DEV_ID_82598AT, 0, 0, 0},
	{IXGBE_INTEL_VENDOR_ID, IXGBE_DEV_ID_82598AT2, 0, 0, 0},
	{IXGBE_INTEL_VENDOR_ID, IXGBE_DEV_ID_82598, 0, 0, 0},
	{IXGBE_INTEL_VENDOR_ID, IXGBE_DEV_ID_82598_DA_DUAL_PORT, 0, 0, 0},
	{IXGBE_INTEL_VENDOR_ID, IXGBE_DEV_ID_82598_CX4_DUAL_PORT, 0, 0, 0},
	{IXGBE_INTEL_VENDOR_ID, IXGBE_DEV_ID_82598EB_XF_LR, 0, 0, 0},
	{IXGBE_INTEL_VENDOR_ID, IXGBE_DEV_ID_82598_SR_DUAL_PORT_EM, 0, 0, 0},
	{IXGBE_INTEL_VENDOR_ID, IXGBE_DEV_ID_82598EB_SFP_LOM, 0, 0, 0},
	{IXGBE_INTEL_VENDOR_ID, IXGBE_DEV_ID_82599_KX4, 0, 0, 0},
	{IXGBE_INTEL_VENDOR_ID, IXGBE_DEV_ID_82599_KX4_MEZZ, 0, 0, 0},
	{IXGBE_INTEL_VENDOR_ID, IXGBE_DEV_ID_82599_SFP, 0, 0, 0},
	{IXGBE_INTEL_VENDOR_ID, IXGBE_DEV_ID_82599_XAUI_LOM, 0, 0, 0},
	{IXGBE_INTEL_VENDOR_ID, IXGBE_DEV_ID_82599_CX4, 0, 0, 0},
	{IXGBE_INTEL_VENDOR_ID, IXGBE_DEV_ID_82599_T3_LOM, 0, 0, 0},
	{IXGBE_INTEL_VENDOR_ID, IXGBE_DEV_ID_82599_COMBO_BACKPLANE, 0, 0, 0},
	{IXGBE_INTEL_VENDOR_ID, IXGBE_DEV_ID_82599_BACKPLANE_FCOE, 0, 0, 0},
	{IXGBE_INTEL_VENDOR_ID, IXGBE_DEV_ID_82599_SFP_SF2, 0, 0, 0},
	{IXGBE_INTEL_VENDOR_ID, IXGBE_DEV_ID_82599_SFP_FCOE, 0, 0, 0},
	{IXGBE_INTEL_VENDOR_ID, IXGBE_DEV_ID_82599EN_SFP, 0, 0, 0},
	{IXGBE_INTEL_VENDOR_ID, IXGBE_DEV_ID_82599_SFP_SF_QP, 0, 0, 0},
	{IXGBE_INTEL_VENDOR_ID, IXGBE_DEV_ID_82599_QSFP_SF_QP, 0, 0, 0},
	{IXGBE_INTEL_VENDOR_ID, IXGBE_DEV_ID_X540T, 0, 0, 0},
	{IXGBE_INTEL_VENDOR_ID, IXGBE_DEV_ID_X540T1, 0, 0, 0},
	{IXGBE_INTEL_VENDOR_ID, IXGBE_DEV_ID_X550T, 0, 0, 0},
	{IXGBE_INTEL_VENDOR_ID, IXGBE_DEV_ID_X550EM_X_KR, 0, 0, 0},
	{IXGBE_INTEL_VENDOR_ID, IXGBE_DEV_ID_X550EM_X_KX4, 0, 0, 0},
	{IXGBE_INTEL_VENDOR_ID, IXGBE_DEV_ID_X550EM_X_10G_T, 0, 0, 0},
	/* required last entry */
	{0, 0, 0, 0, 0}
};

/*********************************************************************
 *  Table of branding strings
 *********************************************************************/

static char    *ixgbe_strings[] = {
	"Intel(R) PRO/10GbE PCI-Express Network Driver"
};

/*********************************************************************
 *  Function prototypes
 *********************************************************************/
static int      ixgbe_probe(device_t);
static int      ixgbe_attach(device_t);
static int      ixgbe_detach(device_t);
static int      ixgbe_shutdown(device_t);
static int	ixgbe_suspend(device_t);
static int	ixgbe_resume(device_t);
static int      ixgbe_ioctl(struct ifnet *, u_long, caddr_t);
static void	ixgbe_init(void *);
static void	ixgbe_init_locked(struct adapter *);
static void     ixgbe_stop(void *);
#if __FreeBSD_version >= 1100036
static uint64_t	ixgbe_get_counter(struct ifnet *, ift_counter);
#endif
static void	ixgbe_add_media_types(struct adapter *);
static void     ixgbe_media_status(struct ifnet *, struct ifmediareq *);
static int      ixgbe_media_change(struct ifnet *);
static void     ixgbe_identify_hardware(struct adapter *);
static int      ixgbe_allocate_pci_resources(struct adapter *);
static void	ixgbe_get_slot_info(struct ixgbe_hw *);
static int      ixgbe_allocate_msix(struct adapter *);
static int      ixgbe_allocate_legacy(struct adapter *);
static int	ixgbe_setup_msix(struct adapter *);
static void	ixgbe_free_pci_resources(struct adapter *);
static void	ixgbe_local_timer(void *);
static int	ixgbe_setup_interface(device_t, struct adapter *);
static void	ixgbe_config_dmac(struct adapter *);
static void	ixgbe_config_delay_values(struct adapter *);
static void	ixgbe_config_link(struct adapter *);
static void	ixgbe_check_eee_support(struct adapter *);
static void	ixgbe_check_wol_support(struct adapter *);
static int	ixgbe_setup_low_power_mode(struct adapter *);
static void	ixgbe_rearm_queues(struct adapter *, u64);

static void     ixgbe_initialize_transmit_units(struct adapter *);
static void     ixgbe_initialize_receive_units(struct adapter *);
static void	ixgbe_enable_rx_drop(struct adapter *);
static void	ixgbe_disable_rx_drop(struct adapter *);

static void     ixgbe_enable_intr(struct adapter *);
static void     ixgbe_disable_intr(struct adapter *);
static void     ixgbe_update_stats_counters(struct adapter *);
static void     ixgbe_set_promisc(struct adapter *);
static void     ixgbe_set_multi(struct adapter *);
static void     ixgbe_update_link_status(struct adapter *);
static void	ixgbe_set_ivar(struct adapter *, u8, u8, s8);
static void	ixgbe_configure_ivars(struct adapter *);
static u8 *	ixgbe_mc_array_itr(struct ixgbe_hw *, u8 **, u32 *);

static void	ixgbe_setup_vlan_hw_support(struct adapter *);
static void	ixgbe_register_vlan(void *, struct ifnet *, u16);
static void	ixgbe_unregister_vlan(void *, struct ifnet *, u16);

static void	ixgbe_add_device_sysctls(struct adapter *);
static void     ixgbe_add_hw_stats(struct adapter *);

/* Sysctl handlers */
static int	ixgbe_set_flowcntl(SYSCTL_HANDLER_ARGS);
static int	ixgbe_set_advertise(SYSCTL_HANDLER_ARGS);
static int	ixgbe_sysctl_thermal_test(SYSCTL_HANDLER_ARGS);
static int	ixgbe_sysctl_dmac(SYSCTL_HANDLER_ARGS);
static int	ixgbe_sysctl_phy_temp(SYSCTL_HANDLER_ARGS);
static int	ixgbe_sysctl_phy_overtemp_occurred(SYSCTL_HANDLER_ARGS);
static int	ixgbe_sysctl_wol_enable(SYSCTL_HANDLER_ARGS);
static int	ixgbe_sysctl_wufc(SYSCTL_HANDLER_ARGS);
static int	ixgbe_sysctl_eee_enable(SYSCTL_HANDLER_ARGS);
static int	ixgbe_sysctl_eee_negotiated(SYSCTL_HANDLER_ARGS);
static int	ixgbe_sysctl_eee_rx_lpi_status(SYSCTL_HANDLER_ARGS);
static int	ixgbe_sysctl_eee_tx_lpi_status(SYSCTL_HANDLER_ARGS);

/* Support for pluggable optic modules */
static bool	ixgbe_sfp_probe(struct adapter *);
static void	ixgbe_setup_optics(struct adapter *);

/* Legacy (single vector interrupt handler */
static void	ixgbe_legacy_irq(void *);

/* The MSI/X Interrupt handlers */
static void	ixgbe_msix_que(void *);
static void	ixgbe_msix_link(void *);

/* Deferred interrupt tasklets */
static void	ixgbe_handle_que(void *, int);
static void	ixgbe_handle_link(void *, int);
static void	ixgbe_handle_msf(void *, int);
static void	ixgbe_handle_mod(void *, int);
static void	ixgbe_handle_phy(void *, int);

#ifdef IXGBE_FDIR
static void	ixgbe_reinit_fdir(void *, int);
#endif

/*********************************************************************
 *  FreeBSD Device Interface Entry Points
 *********************************************************************/

static device_method_t ix_methods[] = {
	/* Device interface */
	DEVMETHOD(device_probe, ixgbe_probe),
	DEVMETHOD(device_attach, ixgbe_attach),
	DEVMETHOD(device_detach, ixgbe_detach),
	DEVMETHOD(device_shutdown, ixgbe_shutdown),
	DEVMETHOD(device_suspend, ixgbe_suspend),
	DEVMETHOD(device_resume, ixgbe_resume),
	DEVMETHOD_END
};

static driver_t ix_driver = {
	"ix", ix_methods, sizeof(struct adapter),
};

devclass_t ix_devclass;
DRIVER_MODULE(ix, pci, ix_driver, ix_devclass, 0, 0);

MODULE_DEPEND(ix, pci, 1, 1, 1);
MODULE_DEPEND(ix, ether, 1, 1, 1);

/*
** TUNEABLE PARAMETERS:
*/

static SYSCTL_NODE(_hw, OID_AUTO, ix, CTLFLAG_RD, 0,
		   "IXGBE driver parameters");

/*
** AIM: Adaptive Interrupt Moderation
** which means that the interrupt rate
** is varied over time based on the
** traffic for that interrupt vector
*/
static int ixgbe_enable_aim = TRUE;
SYSCTL_INT(_hw_ix, OID_AUTO, enable_aim, CTLFLAG_RWTUN, &ixgbe_enable_aim, 0,
    "Enable adaptive interrupt moderation");

static int ixgbe_max_interrupt_rate = (4000000 / IXGBE_LOW_LATENCY);
SYSCTL_INT(_hw_ix, OID_AUTO, max_interrupt_rate, CTLFLAG_RDTUN,
    &ixgbe_max_interrupt_rate, 0, "Maximum interrupts per second");

/* How many packets rxeof tries to clean at a time */
static int ixgbe_rx_process_limit = 256;
TUNABLE_INT("hw.ixgbe.rx_process_limit", &ixgbe_rx_process_limit);
SYSCTL_INT(_hw_ix, OID_AUTO, rx_process_limit, CTLFLAG_RDTUN,
    &ixgbe_rx_process_limit, 0,
    "Maximum number of received packets to process at a time,"
    "-1 means unlimited");

/* How many packets txeof tries to clean at a time */
static int ixgbe_tx_process_limit = 256;
TUNABLE_INT("hw.ixgbe.tx_process_limit", &ixgbe_tx_process_limit);
SYSCTL_INT(_hw_ix, OID_AUTO, tx_process_limit, CTLFLAG_RDTUN,
    &ixgbe_tx_process_limit, 0,
    "Maximum number of sent packets to process at a time,"
    "-1 means unlimited");

/*
** Smart speed setting, default to on
** this only works as a compile option
** right now as its during attach, set
** this to 'ixgbe_smart_speed_off' to
** disable.
*/
static int ixgbe_smart_speed = ixgbe_smart_speed_on;

/*
 * MSIX should be the default for best performance,
 * but this allows it to be forced off for testing.
 */
static int ixgbe_enable_msix = 1;
SYSCTL_INT(_hw_ix, OID_AUTO, enable_msix, CTLFLAG_RDTUN, &ixgbe_enable_msix, 0,
    "Enable MSI-X interrupts");

/*
 * Number of Queues, can be set to 0,
 * it then autoconfigures based on the
 * number of cpus with a max of 8. This
 * can be overriden manually here.
 */
static int ixgbe_num_queues = 0;
SYSCTL_INT(_hw_ix, OID_AUTO, num_queues, CTLFLAG_RDTUN, &ixgbe_num_queues, 0,
    "Number of queues to configure, 0 indicates autoconfigure");

/*
** Number of TX descriptors per ring,
** setting higher than RX as this seems
** the better performing choice.
*/
static int ixgbe_txd = PERFORM_TXD;
SYSCTL_INT(_hw_ix, OID_AUTO, txd, CTLFLAG_RDTUN, &ixgbe_txd, 0,
    "Number of transmit descriptors per queue");

/* Number of RX descriptors per ring */
static int ixgbe_rxd = PERFORM_RXD;
SYSCTL_INT(_hw_ix, OID_AUTO, rxd, CTLFLAG_RDTUN, &ixgbe_rxd, 0,
    "Number of receive descriptors per queue");

/*
** Defining this on will allow the use
** of unsupported SFP+ modules, note that
** doing so you are on your own :)
*/
static int allow_unsupported_sfp = FALSE;
TUNABLE_INT("hw.ix.unsupported_sfp", &allow_unsupported_sfp);

/* Keep running tab on them for sanity check */
static int ixgbe_total_ports;

#ifdef IXGBE_FDIR
/*
** Flow Director actually 'steals'
** part of the packet buffer as its
** filter pool, this variable controls
** how much it uses:
**  0 = 64K, 1 = 128K, 2 = 256K
*/
static int fdir_pballoc = 1;
#endif

#ifdef DEV_NETMAP
/*
 * The #ifdef DEV_NETMAP / #endif blocks in this file are meant to
 * be a reference on how to implement netmap support in a driver.
 * Additional comments are in ixgbe_netmap.h .
 *
 * <dev/netmap/ixgbe_netmap.h> contains functions for netmap support
 * that extend the standard driver.
 */
#include <dev/netmap/ixgbe_netmap.h>
#endif /* DEV_NETMAP */

/*********************************************************************
 *  Device identification routine
 *
 *  ixgbe_probe determines if the driver should be loaded on
 *  adapter based on PCI vendor/device id of the adapter.
 *
 *  return BUS_PROBE_DEFAULT on success, positive on failure
 *********************************************************************/

static int
ixgbe_probe(device_t dev)
{
	ixgbe_vendor_info_t *ent;

	u16	pci_vendor_id = 0;
	u16	pci_device_id = 0;
	u16	pci_subvendor_id = 0;
	u16	pci_subdevice_id = 0;
	char	adapter_name[256];

	INIT_DEBUGOUT("ixgbe_probe: begin");

	pci_vendor_id = pci_get_vendor(dev);
	if (pci_vendor_id != IXGBE_INTEL_VENDOR_ID)
		return (ENXIO);

	pci_device_id = pci_get_device(dev);
	pci_subvendor_id = pci_get_subvendor(dev);
	pci_subdevice_id = pci_get_subdevice(dev);

	ent = ixgbe_vendor_info_array;
	while (ent->vendor_id != 0) {
		if ((pci_vendor_id == ent->vendor_id) &&
		    (pci_device_id == ent->device_id) &&

		    ((pci_subvendor_id == ent->subvendor_id) ||
		     (ent->subvendor_id == 0)) &&

		    ((pci_subdevice_id == ent->subdevice_id) ||
		     (ent->subdevice_id == 0))) {
			sprintf(adapter_name, "%s, Version - %s",
				ixgbe_strings[ent->index],
				ixgbe_driver_version);
			device_set_desc_copy(dev, adapter_name);
			++ixgbe_total_ports;
			return (BUS_PROBE_DEFAULT);
		}
		ent++;
	}
	return (ENXIO);
}

/*********************************************************************
 *  Device initialization routine
 *
 *  The attach entry point is called when the driver is being loaded.
 *  This routine identifies the type of hardware, allocates all resources
 *  and initializes the hardware.
 *
 *  return 0 on success, positive on failure
 *********************************************************************/

static int
ixgbe_attach(device_t dev)
{
	struct adapter *adapter;
	struct ixgbe_hw *hw;
	int             error = 0;
	u16		csum;
	u32		ctrl_ext;

	INIT_DEBUGOUT("ixgbe_attach: begin");

	/* Allocate, clear, and link in our adapter structure */
	adapter = device_get_softc(dev);
	adapter->dev = adapter->osdep.dev = dev;
	hw = &adapter->hw;

	/* Core Lock Init*/
	IXGBE_CORE_LOCK_INIT(adapter, device_get_nameunit(dev));

	/* Set up the timer callout */
	callout_init_mtx(&adapter->timer, &adapter->core_mtx, 0);

	/* Determine hardware revision */
	ixgbe_identify_hardware(adapter);

	/* Do base PCI setup - map BAR0 */
	if (ixgbe_allocate_pci_resources(adapter)) {
		device_printf(dev, "Allocation of PCI resources failed\n");
		error = ENXIO;
		goto err_out;
	}

	/* Do descriptor calc and sanity checks */
	if (((ixgbe_txd * sizeof(union ixgbe_adv_tx_desc)) % DBA_ALIGN) != 0 ||
	    ixgbe_txd < MIN_TXD || ixgbe_txd > MAX_TXD) {
		device_printf(dev, "TXD config issue, using default!\n");
		adapter->num_tx_desc = DEFAULT_TXD;
	} else
		adapter->num_tx_desc = ixgbe_txd;

	/*
	** With many RX rings it is easy to exceed the
	** system mbuf allocation. Tuning nmbclusters
	** can alleviate this.
	*/
	if (nmbclusters > 0) {
		int s;
		s = (ixgbe_rxd * adapter->num_queues) * ixgbe_total_ports;
		if (s > nmbclusters) {
			device_printf(dev, "RX Descriptors exceed "
			    "system mbuf max, using default instead!\n");
			ixgbe_rxd = DEFAULT_RXD;
		}
	}

	if (((ixgbe_rxd * sizeof(union ixgbe_adv_rx_desc)) % DBA_ALIGN) != 0 ||
	    ixgbe_rxd < MIN_RXD || ixgbe_rxd > MAX_RXD) {
		device_printf(dev, "RXD config issue, using default!\n");
		adapter->num_rx_desc = DEFAULT_RXD;
	} else
		adapter->num_rx_desc = ixgbe_rxd;

	/* Allocate our TX/RX Queues */
	if (ixgbe_allocate_queues(adapter)) {
		error = ENOMEM;
		goto err_out;
	}

	/* Allocate multicast array memory. */
	adapter->mta = malloc(sizeof(u8) * IXGBE_ETH_LENGTH_OF_ADDRESS *
	    MAX_NUM_MULTICAST_ADDRESSES, M_DEVBUF, M_NOWAIT);
	if (adapter->mta == NULL) {
		device_printf(dev, "Can not allocate multicast setup array\n");
		error = ENOMEM;
		goto err_late;
	}

	/* Initialize the shared code */
	hw->allow_unsupported_sfp = allow_unsupported_sfp;
	error = ixgbe_init_shared_code(hw);
	if (error == IXGBE_ERR_SFP_NOT_PRESENT) {
		/*
		** No optics in this port, set up
		** so the timer routine will probe
		** for later insertion.
		*/
		adapter->sfp_probe = TRUE;
		error = 0;
	} else if (error == IXGBE_ERR_SFP_NOT_SUPPORTED) {
		device_printf(dev,"Unsupported SFP+ module detected!\n");
		error = EIO;
		goto err_late;
	} else if (error) {
		device_printf(dev,"Unable to initialize the shared code\n");
		error = EIO;
		goto err_late;
	}

	/* Make sure we have a good EEPROM before we read from it */
	if (ixgbe_validate_eeprom_checksum(&adapter->hw, &csum) < 0) {
		device_printf(dev,"The EEPROM Checksum Is Not Valid\n");
		error = EIO;
		goto err_late;
	}

	error = ixgbe_init_hw(hw);
	switch (error) {
	case IXGBE_ERR_EEPROM_VERSION:
		device_printf(dev, "This device is a pre-production adapter/"
		    "LOM.  Please be aware there may be issues associated "
		    "with your hardware.\n If you are experiencing problems "
		    "please contact your Intel or hardware representative "
		    "who provided you with this hardware.\n");
		break;
	case IXGBE_ERR_SFP_NOT_SUPPORTED:
		device_printf(dev,"Unsupported SFP+ Module\n");
		error = EIO;
		goto err_late;
	case IXGBE_ERR_SFP_NOT_PRESENT:
		device_printf(dev,"No SFP+ Module found\n");
		/* falls thru */
	default:
		break;
	}

	/* Detect and set physical type */
	ixgbe_setup_optics(adapter);

	if ((adapter->msix > 1) && (ixgbe_enable_msix))
		error = ixgbe_allocate_msix(adapter);
	else
		error = ixgbe_allocate_legacy(adapter);
	if (error)
		goto err_late;

	/* Setup OS specific network interface */
	if (ixgbe_setup_interface(dev, adapter) != 0)
		goto err_late;

	/* Initialize statistics */
	ixgbe_update_stats_counters(adapter);

	/* Register for VLAN events */
	adapter->vlan_attach = EVENTHANDLER_REGISTER(vlan_config,
	    ixgbe_register_vlan, adapter, EVENTHANDLER_PRI_FIRST);
	adapter->vlan_detach = EVENTHANDLER_REGISTER(vlan_unconfig,
	    ixgbe_unregister_vlan, adapter, EVENTHANDLER_PRI_FIRST);

        /* Check PCIE slot type/speed/width */
	ixgbe_get_slot_info(hw);


	/* Set an initial default flow control value */
	adapter->fc = ixgbe_fc_full;

	/* Check for certain supported features */
	ixgbe_check_wol_support(adapter);
	ixgbe_check_eee_support(adapter);

	/* Add sysctls */
	ixgbe_add_device_sysctls(adapter);
	ixgbe_add_hw_stats(adapter);

	/* let hardware know driver is loaded */
	ctrl_ext = IXGBE_READ_REG(hw, IXGBE_CTRL_EXT);
	ctrl_ext |= IXGBE_CTRL_EXT_DRV_LOAD;
	IXGBE_WRITE_REG(hw, IXGBE_CTRL_EXT, ctrl_ext);

#ifdef DEV_NETMAP
	ixgbe_netmap_attach(adapter);
#endif /* DEV_NETMAP */
	INIT_DEBUGOUT("ixgbe_attach: end");
	return (0);

err_late:
	ixgbe_free_transmit_structures(adapter);
	ixgbe_free_receive_structures(adapter);
err_out:
	if (adapter->ifp != NULL)
		if_free(adapter->ifp);
	ixgbe_free_pci_resources(adapter);
	free(adapter->mta, M_DEVBUF);
	return (error);
}

/*********************************************************************
 *  Device removal routine
 *
 *  The detach entry point is called when the driver is being removed.
 *  This routine stops the adapter and deallocates all the resources
 *  that were allocated for driver operation.
 *
 *  return 0 on success, positive on failure
 *********************************************************************/

static int
ixgbe_detach(device_t dev)
{
	struct adapter *adapter = device_get_softc(dev);
	struct ix_queue *que = adapter->queues;
	struct tx_ring *txr = adapter->tx_rings;
	u32	ctrl_ext;

	INIT_DEBUGOUT("ixgbe_detach: begin");

	/* Make sure VLANS are not using driver */
	if (adapter->ifp->if_vlantrunk != NULL) {
		device_printf(dev,"Vlan in use, detach first\n");
		return (EBUSY);
	}

	/* Stop the adapter */
	IXGBE_CORE_LOCK(adapter);
	ixgbe_setup_low_power_mode(adapter);
	IXGBE_CORE_UNLOCK(adapter);

	for (int i = 0; i < adapter->num_queues; i++, que++, txr++) {
		if (que->tq) {
#ifndef IXGBE_LEGACY_TX
			taskqueue_drain(que->tq, &txr->txq_task);
#endif
			taskqueue_drain(que->tq, &que->que_task);
			taskqueue_free(que->tq);
		}
	}

	/* Drain the Link queue */
	if (adapter->tq) {
		taskqueue_drain(adapter->tq, &adapter->link_task);
		taskqueue_drain(adapter->tq, &adapter->mod_task);
		taskqueue_drain(adapter->tq, &adapter->msf_task);
		taskqueue_drain(adapter->tq, &adapter->phy_task);
#ifdef IXGBE_FDIR
		taskqueue_drain(adapter->tq, &adapter->fdir_task);
#endif
		taskqueue_free(adapter->tq);
	}

	/* let hardware know driver is unloading */
	ctrl_ext = IXGBE_READ_REG(&adapter->hw, IXGBE_CTRL_EXT);
	ctrl_ext &= ~IXGBE_CTRL_EXT_DRV_LOAD;
	IXGBE_WRITE_REG(&adapter->hw, IXGBE_CTRL_EXT, ctrl_ext);

	/* Unregister VLAN events */
	if (adapter->vlan_attach != NULL)
		EVENTHANDLER_DEREGISTER(vlan_config, adapter->vlan_attach);
	if (adapter->vlan_detach != NULL)
		EVENTHANDLER_DEREGISTER(vlan_unconfig, adapter->vlan_detach);

	ether_ifdetach(adapter->ifp);
	callout_drain(&adapter->timer);
#ifdef DEV_NETMAP
	netmap_detach(adapter->ifp);
#endif /* DEV_NETMAP */
	ixgbe_free_pci_resources(adapter);
	bus_generic_detach(dev);
	if_free(adapter->ifp);

	ixgbe_free_transmit_structures(adapter);
	ixgbe_free_receive_structures(adapter);
	free(adapter->mta, M_DEVBUF);

	IXGBE_CORE_LOCK_DESTROY(adapter);
	return (0);
}

/*********************************************************************
 *
 *  Shutdown entry point
 *
 **********************************************************************/

static int
ixgbe_shutdown(device_t dev)
{
	struct adapter *adapter = device_get_softc(dev);
	int error = 0;

	INIT_DEBUGOUT("ixgbe_shutdown: begin");

	IXGBE_CORE_LOCK(adapter);
	error = ixgbe_setup_low_power_mode(adapter);
	IXGBE_CORE_UNLOCK(adapter);

	return (error);
}

/**
 * Methods for going from:
 * D0 -> D3: ixgbe_suspend
 * D3 -> D0: ixgbe_resume
 */
static int
ixgbe_suspend(device_t dev)
{
	struct adapter *adapter = device_get_softc(dev);
	int error = 0;

	INIT_DEBUGOUT("ixgbe_suspend: begin");

	IXGBE_CORE_LOCK(adapter);

	error = ixgbe_setup_low_power_mode(adapter);

	/* Save state and power down */
	pci_save_state(dev);
	pci_set_powerstate(dev, PCI_POWERSTATE_D3);

	IXGBE_CORE_UNLOCK(adapter);

	return (error);
}

static int
ixgbe_resume(device_t dev)
{
	struct adapter *adapter = device_get_softc(dev);
	struct ifnet *ifp = adapter->ifp;
	struct ixgbe_hw *hw = &adapter->hw;
	u32 wus;

	INIT_DEBUGOUT("ixgbe_resume: begin");

	IXGBE_CORE_LOCK(adapter);

	pci_set_powerstate(dev, PCI_POWERSTATE_D0);
	pci_restore_state(dev);

	/* Read & clear WUS register */
	wus = IXGBE_READ_REG(hw, IXGBE_WUS);
	if (wus)
		device_printf(dev, "Woken up by (WUS): %#010x\n",
		    IXGBE_READ_REG(hw, IXGBE_WUS));
	IXGBE_WRITE_REG(hw, IXGBE_WUS, 0xffffffff);
	/* And clear WUFC until next low-power transition */
	IXGBE_WRITE_REG(hw, IXGBE_WUFC, 0);

	/*
	 * Required after D3->D0 transition;
	 * will re-advertise all previous advertised speeds
	 */
	if (ifp->if_flags & IFF_UP)
		ixgbe_init_locked(adapter);

	IXGBE_CORE_UNLOCK(adapter);

	INIT_DEBUGOUT("ixgbe_resume: end");
	return (0);
}


/*********************************************************************
 *  Ioctl entry point
 *
 *  ixgbe_ioctl is called when the user wants to configure the
 *  interface.
 *
 *  return 0 on success, positive on failure
 **********************************************************************/

static int
ixgbe_ioctl(struct ifnet * ifp, u_long command, caddr_t data)
{
	struct adapter	*adapter = ifp->if_softc;
	struct ifreq	*ifr = (struct ifreq *) data;
#if defined(INET) || defined(INET6)
	struct ifaddr *ifa = (struct ifaddr *)data;
	bool		avoid_reset = FALSE;
#endif
	int             error = 0;

	switch (command) {

        case SIOCSIFADDR:
#ifdef INET
		if (ifa->ifa_addr->sa_family == AF_INET)
			avoid_reset = TRUE;
#endif
#ifdef INET6
		if (ifa->ifa_addr->sa_family == AF_INET6)
			avoid_reset = TRUE;
#endif
#if defined(INET) || defined(INET6)
		/*
		** Calling init results in link renegotiation,
		** so we avoid doing it when possible.
		*/
		if (avoid_reset) {
			ifp->if_flags |= IFF_UP;
			if (!(ifp->if_drv_flags & IFF_DRV_RUNNING))
				ixgbe_init(adapter);
			if (!(ifp->if_flags & IFF_NOARP))
				arp_ifinit(ifp, ifa);
		} else
			error = ether_ioctl(ifp, command, data);
#endif
		break;
	case SIOCSIFMTU:
		IOCTL_DEBUGOUT("ioctl: SIOCSIFMTU (Set Interface MTU)");
		if (ifr->ifr_mtu > IXGBE_MAX_MTU) {
			error = EINVAL;
		} else {
			IXGBE_CORE_LOCK(adapter);
			ifp->if_mtu = ifr->ifr_mtu;
			adapter->max_frame_size =
				ifp->if_mtu + IXGBE_MTU_HDR;
			ixgbe_init_locked(adapter);
			IXGBE_CORE_UNLOCK(adapter);
		}
		break;
	case SIOCSIFFLAGS:
		IOCTL_DEBUGOUT("ioctl: SIOCSIFFLAGS (Set Interface Flags)");
		IXGBE_CORE_LOCK(adapter);
		if (ifp->if_flags & IFF_UP) {
			if ((ifp->if_drv_flags & IFF_DRV_RUNNING)) {
				if ((ifp->if_flags ^ adapter->if_flags) &
				    (IFF_PROMISC | IFF_ALLMULTI)) {
					ixgbe_set_promisc(adapter);
                                }
			} else
				ixgbe_init_locked(adapter);
		} else
			if (ifp->if_drv_flags & IFF_DRV_RUNNING)
				ixgbe_stop(adapter);
		adapter->if_flags = ifp->if_flags;
		IXGBE_CORE_UNLOCK(adapter);
		break;
	case SIOCADDMULTI:
	case SIOCDELMULTI:
		IOCTL_DEBUGOUT("ioctl: SIOC(ADD|DEL)MULTI");
		if (ifp->if_drv_flags & IFF_DRV_RUNNING) {
			IXGBE_CORE_LOCK(adapter);
			ixgbe_disable_intr(adapter);
			ixgbe_set_multi(adapter);
			ixgbe_enable_intr(adapter);
			IXGBE_CORE_UNLOCK(adapter);
		}
		break;
	case SIOCSIFMEDIA:
	case SIOCGIFMEDIA:
		IOCTL_DEBUGOUT("ioctl: SIOCxIFMEDIA (Get/Set Interface Media)");
		error = ifmedia_ioctl(ifp, ifr, &adapter->media, command);
		break;
	case SIOCSIFCAP:
	{
		int mask = ifr->ifr_reqcap ^ ifp->if_capenable;
		IOCTL_DEBUGOUT("ioctl: SIOCSIFCAP (Set Capabilities)");
		if (mask & IFCAP_HWCSUM)
			ifp->if_capenable ^= IFCAP_HWCSUM;
		if (mask & IFCAP_TSO4)
			ifp->if_capenable ^= IFCAP_TSO4;
		if (mask & IFCAP_TSO6)
			ifp->if_capenable ^= IFCAP_TSO6;
		if (mask & IFCAP_LRO)
			ifp->if_capenable ^= IFCAP_LRO;
		if (mask & IFCAP_VLAN_HWTAGGING)
			ifp->if_capenable ^= IFCAP_VLAN_HWTAGGING;
		if (mask & IFCAP_VLAN_HWFILTER)
			ifp->if_capenable ^= IFCAP_VLAN_HWFILTER;
		if (mask & IFCAP_VLAN_HWTSO)
			ifp->if_capenable ^= IFCAP_VLAN_HWTSO;
		if (ifp->if_drv_flags & IFF_DRV_RUNNING) {
			IXGBE_CORE_LOCK(adapter);
			ixgbe_init_locked(adapter);
			IXGBE_CORE_UNLOCK(adapter);
		}
		VLAN_CAPABILITIES(ifp);
		break;
	}
#if __FreeBSD_version >= 1100036
	case SIOCGI2C:
	{
		struct ixgbe_hw *hw = &adapter->hw;
		struct ifi2creq i2c;
		int i;
		IOCTL_DEBUGOUT("ioctl: SIOCGI2C (Get I2C Data)");
		error = copyin(ifr->ifr_data, &i2c, sizeof(i2c));
		if (error != 0)
			break;
		if (i2c.dev_addr != 0xA0 && i2c.dev_addr != 0xA2) {
			error = EINVAL;
			break;
		}
		if (i2c.len > sizeof(i2c.data)) {
			error = EINVAL;
			break;
		}

		for (i = 0; i < i2c.len; i++)
			hw->phy.ops.read_i2c_byte(hw, i2c.offset + i,
			    i2c.dev_addr, &i2c.data[i]);
		error = copyout(&i2c, ifr->ifr_data, sizeof(i2c));
		break;
	}
#endif
	default:
		IOCTL_DEBUGOUT1("ioctl: UNKNOWN (0x%X)\n", (int)command);
		error = ether_ioctl(ifp, command, data);
		break;
	}

	return (error);
}

/*********************************************************************
 *  Init entry point
 *
 *  This routine is used in two ways. It is used by the stack as
 *  init entry point in network interface structure. It is also used
 *  by the driver as a hw/sw initialization routine to get to a
 *  consistent state.
 *
 *  return 0 on success, positive on failure
 **********************************************************************/
#define IXGBE_MHADD_MFS_SHIFT 16

static void
ixgbe_init_locked(struct adapter *adapter)
{
	struct ifnet   *ifp = adapter->ifp;
	device_t 	dev = adapter->dev;
	struct ixgbe_hw *hw = &adapter->hw;
	u32		k, txdctl, mhadd, gpie;
	u32		rxdctl, rxctrl;

	mtx_assert(&adapter->core_mtx, MA_OWNED);
	INIT_DEBUGOUT("ixgbe_init_locked: begin");
	hw->adapter_stopped = FALSE;
	ixgbe_stop_adapter(hw);
        callout_stop(&adapter->timer);

        /* reprogram the RAR[0] in case user changed it. */
        ixgbe_set_rar(hw, 0, adapter->hw.mac.addr, 0, IXGBE_RAH_AV);

	/* Get the latest mac address, User can use a LAA */
	bcopy(IF_LLADDR(adapter->ifp), hw->mac.addr,
	      IXGBE_ETH_LENGTH_OF_ADDRESS);
	ixgbe_set_rar(hw, 0, hw->mac.addr, 0, 1);
	hw->addr_ctrl.rar_used_count = 1;

	/* Set the various hardware offload abilities */
	ifp->if_hwassist = 0;
	if (ifp->if_capenable & IFCAP_TSO)
		ifp->if_hwassist |= CSUM_TSO;
	if (ifp->if_capenable & IFCAP_TXCSUM) {
		ifp->if_hwassist |= (CSUM_TCP | CSUM_UDP);
#if __FreeBSD_version >= 800000
		if (hw->mac.type != ixgbe_mac_82598EB)
			ifp->if_hwassist |= CSUM_SCTP;
#endif
	}

	/* Prepare transmit descriptors and buffers */
	if (ixgbe_setup_transmit_structures(adapter)) {
		device_printf(dev, "Could not setup transmit structures\n");
		ixgbe_stop(adapter);
		return;
	}

	ixgbe_init_hw(hw);
	ixgbe_initialize_transmit_units(adapter);

	/* Setup Multicast table */
	ixgbe_set_multi(adapter);

	/*
	** Determine the correct mbuf pool
	** for doing jumbo frames
	*/
	if (adapter->max_frame_size <= 2048)
		adapter->rx_mbuf_sz = MCLBYTES;
	else if (adapter->max_frame_size <= 4096)
		adapter->rx_mbuf_sz = MJUMPAGESIZE;
	else if (adapter->max_frame_size <= 9216)
		adapter->rx_mbuf_sz = MJUM9BYTES;
	else
		adapter->rx_mbuf_sz = MJUM16BYTES;

	/* Prepare receive descriptors and buffers */
	if (ixgbe_setup_receive_structures(adapter)) {
		device_printf(dev, "Could not setup receive structures\n");
		ixgbe_stop(adapter);
		return;
	}

	/* Configure RX settings */
	ixgbe_initialize_receive_units(adapter);

	gpie = IXGBE_READ_REG(&adapter->hw, IXGBE_GPIE);

	/* Enable Fan Failure Interrupt */
	gpie |= IXGBE_SDP1_GPIEN_BY_MAC(hw);

	/* Add for Module detection */
	if (hw->mac.type == ixgbe_mac_82599EB)
		gpie |= IXGBE_SDP2_GPIEN;

	/*
	 * Thermal Failure Detection (X540)
	 * Link Detection (X552)
	 */
	if (hw->mac.type == ixgbe_mac_X540 ||
	    hw->device_id == IXGBE_DEV_ID_X550EM_X_SFP ||
	    hw->device_id == IXGBE_DEV_ID_X550EM_X_10G_T)
		gpie |= IXGBE_SDP0_GPIEN_X540;

	if (adapter->msix > 1) {
		/* Enable Enhanced MSIX mode */
		gpie |= IXGBE_GPIE_MSIX_MODE;
		gpie |= IXGBE_GPIE_EIAME | IXGBE_GPIE_PBA_SUPPORT |
		    IXGBE_GPIE_OCD;
	}
	IXGBE_WRITE_REG(hw, IXGBE_GPIE, gpie);

	/* Set MTU size */
	if (ifp->if_mtu > ETHERMTU) {
		/* aka IXGBE_MAXFRS on 82599 and newer */
		mhadd = IXGBE_READ_REG(hw, IXGBE_MHADD);
		mhadd &= ~IXGBE_MHADD_MFS_MASK;
		mhadd |= adapter->max_frame_size << IXGBE_MHADD_MFS_SHIFT;
		IXGBE_WRITE_REG(hw, IXGBE_MHADD, mhadd);
	}

	/* Now enable all the queues */
	for (int i = 0; i < adapter->num_queues; i++) {
		txdctl = IXGBE_READ_REG(hw, IXGBE_TXDCTL(i));
		txdctl |= IXGBE_TXDCTL_ENABLE;
		/* Set WTHRESH to 8, burst writeback */
		txdctl |= (8 << 16);
		/*
		 * When the internal queue falls below PTHRESH (32),
		 * start prefetching as long as there are at least
		 * HTHRESH (1) buffers ready. The values are taken
		 * from the Intel linux driver 3.8.21.
		 * Prefetching enables tx line rate even with 1 queue.
		 */
		txdctl |= (32 << 0) | (1 << 8);
		IXGBE_WRITE_REG(hw, IXGBE_TXDCTL(i), txdctl);
	}

	for (int i = 0; i < adapter->num_queues; i++) {
		rxdctl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(i));
		if (hw->mac.type == ixgbe_mac_82598EB) {
			/*
			** PTHRESH = 21
			** HTHRESH = 4
			** WTHRESH = 8
			*/
			rxdctl &= ~0x3FFFFF;
			rxdctl |= 0x080420;
		}
		rxdctl |= IXGBE_RXDCTL_ENABLE;
		IXGBE_WRITE_REG(hw, IXGBE_RXDCTL(i), rxdctl);
		for (k = 0; k < 10; k++) {
			if (IXGBE_READ_REG(hw, IXGBE_RXDCTL(i)) &
			    IXGBE_RXDCTL_ENABLE)
				break;
			else
				msec_delay(1);
		}
		wmb();
#ifdef DEV_NETMAP
		/*
		 * In netmap mode, we must preserve the buffers made
		 * available to userspace before the if_init()
		 * (this is true by default on the TX side, because
		 * init makes all buffers available to userspace).
		 *
		 * netmap_reset() and the device specific routines
		 * (e.g. ixgbe_setup_receive_rings()) map these
		 * buffers at the end of the NIC ring, so here we
		 * must set the RDT (tail) register to make sure
		 * they are not overwritten.
		 *
		 * In this driver the NIC ring starts at RDH = 0,
		 * RDT points to the last slot available for reception (?),
		 * so RDT = num_rx_desc - 1 means the whole ring is available.
		 */
		if (ifp->if_capenable & IFCAP_NETMAP) {
			struct netmap_adapter *na = NA(adapter->ifp);
			struct netmap_kring *kring = &na->rx_rings[i];
			int t = na->num_rx_desc - 1 - nm_kr_rxspace(kring);

			IXGBE_WRITE_REG(hw, IXGBE_RDT(i), t);
		} else
#endif /* DEV_NETMAP */
		IXGBE_WRITE_REG(hw, IXGBE_RDT(i), adapter->num_rx_desc - 1);
	}

	/* Enable Receive engine */
	rxctrl = IXGBE_READ_REG(hw, IXGBE_RXCTRL);
	if (hw->mac.type == ixgbe_mac_82598EB)
		rxctrl |= IXGBE_RXCTRL_DMBYPS;
	rxctrl |= IXGBE_RXCTRL_RXEN;
	ixgbe_enable_rx_dma(hw, rxctrl);

	callout_reset(&adapter->timer, hz, ixgbe_local_timer, adapter);

	/* Set up MSI/X routing */
	if (ixgbe_enable_msix)  {
		ixgbe_configure_ivars(adapter);
		/* Set up auto-mask */
		if (hw->mac.type == ixgbe_mac_82598EB)
			IXGBE_WRITE_REG(hw, IXGBE_EIAM, IXGBE_EICS_RTX_QUEUE);
		else {
			IXGBE_WRITE_REG(hw, IXGBE_EIAM_EX(0), 0xFFFFFFFF);
			IXGBE_WRITE_REG(hw, IXGBE_EIAM_EX(1), 0xFFFFFFFF);
		}
	} else {  /* Simple settings for Legacy/MSI */
                ixgbe_set_ivar(adapter, 0, 0, 0);
                ixgbe_set_ivar(adapter, 0, 0, 1);
		IXGBE_WRITE_REG(hw, IXGBE_EIAM, IXGBE_EICS_RTX_QUEUE);
	}

#ifdef IXGBE_FDIR
	/* Init Flow director */
	if (hw->mac.type != ixgbe_mac_82598EB) {
		u32 hdrm = 32 << fdir_pballoc;

		hw->mac.ops.setup_rxpba(hw, 0, hdrm, PBA_STRATEGY_EQUAL);
		ixgbe_init_fdir_signature_82599(&adapter->hw, fdir_pballoc);
	}
#endif

	/*
	** Check on any SFP devices that
	** need to be kick-started
	*/
	if (hw->phy.type == ixgbe_phy_none) {
		int err = hw->phy.ops.identify(hw);
		if (err == IXGBE_ERR_SFP_NOT_SUPPORTED) {
                	device_printf(dev,
			    "Unsupported SFP+ module type was detected.\n");
			return;
        	}
	}

	/* Set moderation on the Link interrupt */
	IXGBE_WRITE_REG(hw, IXGBE_EITR(adapter->vector), IXGBE_LINK_ITR);

	/* Configure Energy Efficient Ethernet for supported devices */
	if (adapter->eee_support)
		ixgbe_setup_eee(hw, adapter->eee_enabled);

	/* Config/Enable Link */
	ixgbe_config_link(adapter);

	/* Hardware Packet Buffer & Flow Control setup */
	ixgbe_config_delay_values(adapter);

	/* Initialize the FC settings */
	ixgbe_start_hw(hw);

	/* Set up VLAN support and filter */
	ixgbe_setup_vlan_hw_support(adapter);

	/* Setup DMA Coalescing */
	ixgbe_config_dmac(adapter);

	/* And now turn on interrupts */
	ixgbe_enable_intr(adapter);

	/* Now inform the stack we're ready */
	ifp->if_drv_flags |= IFF_DRV_RUNNING;

	return;
}

static void
ixgbe_init(void *arg)
{
	struct adapter *adapter = arg;

	IXGBE_CORE_LOCK(adapter);
	ixgbe_init_locked(adapter);
	IXGBE_CORE_UNLOCK(adapter);
	return;
}

static void
ixgbe_config_delay_values(struct adapter *adapter)
{
	struct ixgbe_hw *hw = &adapter->hw;
	u32 rxpb, frame, size, tmp;

	frame = adapter->max_frame_size;

	/* Calculate High Water */
	switch (hw->mac.type) {
	case ixgbe_mac_X540:
	case ixgbe_mac_X550:
	case ixgbe_mac_X550EM_x:
		tmp = IXGBE_DV_X540(frame, frame);
		break;
	default:
		tmp = IXGBE_DV(frame, frame);
		break;
	}
	size = IXGBE_BT2KB(tmp);
	rxpb = IXGBE_READ_REG(hw, IXGBE_RXPBSIZE(0)) >> 10;
	hw->fc.high_water[0] = rxpb - size;

	/* Now calculate Low Water */
	switch (hw->mac.type) {
	case ixgbe_mac_X540:
	case ixgbe_mac_X550:
	case ixgbe_mac_X550EM_x:
		tmp = IXGBE_LOW_DV_X540(frame);
		break;
	default:
		tmp = IXGBE_LOW_DV(frame);
		break;
	}
	hw->fc.low_water[0] = IXGBE_BT2KB(tmp);

	hw->fc.requested_mode = adapter->fc;
	hw->fc.pause_time = IXGBE_FC_PAUSE;
	hw->fc.send_xon = TRUE;
}

/*
**
** MSIX Interrupt Handlers and Tasklets
**
*/

static inline void
ixgbe_enable_queue(struct adapter *adapter, u32 vector)
{
	struct ixgbe_hw *hw = &adapter->hw;
	u64	queue = (u64)(1 << vector);
	u32	mask;

	if (hw->mac.type == ixgbe_mac_82598EB) {
                mask = (IXGBE_EIMS_RTX_QUEUE & queue);
                IXGBE_WRITE_REG(hw, IXGBE_EIMS, mask);
	} else {
                mask = (queue & 0xFFFFFFFF);
                if (mask)
                        IXGBE_WRITE_REG(hw, IXGBE_EIMS_EX(0), mask);
                mask = (queue >> 32);
                if (mask)
                        IXGBE_WRITE_REG(hw, IXGBE_EIMS_EX(1), mask);
	}
}

static inline void
ixgbe_disable_queue(struct adapter *adapter, u32 vector)
{
	struct ixgbe_hw *hw = &adapter->hw;
	u64	queue = (u64)(1 << vector);
	u32	mask;

	if (hw->mac.type == ixgbe_mac_82598EB) {
                mask = (IXGBE_EIMS_RTX_QUEUE & queue);
                IXGBE_WRITE_REG(hw, IXGBE_EIMC, mask);
	} else {
                mask = (queue & 0xFFFFFFFF);
                if (mask)
                        IXGBE_WRITE_REG(hw, IXGBE_EIMC_EX(0), mask);
                mask = (queue >> 32);
                if (mask)
                        IXGBE_WRITE_REG(hw, IXGBE_EIMC_EX(1), mask);
	}
}

static void
ixgbe_handle_que(void *context, int pending)
{
	struct ix_queue *que = context;
	struct adapter  *adapter = que->adapter;
	struct tx_ring  *txr = que->txr;
	struct ifnet    *ifp = adapter->ifp;
	bool		more;

	if (ifp->if_drv_flags & IFF_DRV_RUNNING) {
		more = ixgbe_rxeof(que);
		IXGBE_TX_LOCK(txr);
		ixgbe_txeof(txr);
#ifndef IXGBE_LEGACY_TX
		if (!drbr_empty(ifp, txr->br))
			ixgbe_mq_start_locked(ifp, txr);
#else
		if (!IFQ_DRV_IS_EMPTY(&ifp->if_snd))
			ixgbe_start_locked(txr, ifp);
#endif
		IXGBE_TX_UNLOCK(txr);
	}

	/* Reenable this interrupt */
	if (que->res != NULL)
		ixgbe_enable_queue(adapter, que->msix);
	else
		ixgbe_enable_intr(adapter);
	return;
}


/*********************************************************************
 *
 *  Legacy Interrupt Service routine
 *
 **********************************************************************/

static void
ixgbe_legacy_irq(void *arg)
{
	struct ix_queue *que = arg;
	struct adapter	*adapter = que->adapter;
	struct ixgbe_hw	*hw = &adapter->hw;
	struct ifnet    *ifp = adapter->ifp;
	struct 		tx_ring *txr = adapter->tx_rings;
	bool		more;
	u32       	reg_eicr;


	reg_eicr = IXGBE_READ_REG(hw, IXGBE_EICR);

	++que->irqs;
	if (reg_eicr == 0) {
		ixgbe_enable_intr(adapter);
		return;
	}

	more = ixgbe_rxeof(que);

	IXGBE_TX_LOCK(txr);
	ixgbe_txeof(txr);
#ifdef IXGBE_LEGACY_TX
	if (!IFQ_DRV_IS_EMPTY(&ifp->if_snd))
		ixgbe_start_locked(txr, ifp);
#else
	if (!drbr_empty(ifp, txr->br))
		ixgbe_mq_start_locked(ifp, txr);
#endif
	IXGBE_TX_UNLOCK(txr);

	/* Check for fan failure */
	if ((hw->phy.media_type == ixgbe_media_type_copper) &&
	    (reg_eicr & IXGBE_EICR_GPI_SDP1_BY_MAC(hw))) {
                device_printf(adapter->dev, "\nCRITICAL: FAN FAILURE!! "
		    "REPLACE IMMEDIATELY!!\n");
		IXGBE_WRITE_REG(hw, IXGBE_EIMS, IXGBE_EICR_GPI_SDP1_BY_MAC(hw));
	}

	/* Link status change */
	if (reg_eicr & IXGBE_EICR_LSC)
		taskqueue_enqueue(adapter->tq, &adapter->link_task);

	/* External PHY interrupt */
	if (hw->device_id == IXGBE_DEV_ID_X550EM_X_10G_T &&
	    (reg_eicr & IXGBE_EICR_GPI_SDP0_X540))
		taskqueue_enqueue(adapter->tq, &adapter->phy_task);

	if (more)
		taskqueue_enqueue(que->tq, &que->que_task);
	else
		ixgbe_enable_intr(adapter);
	return;
}


/*********************************************************************
 *
 *  MSIX Queue Interrupt Service routine
 *
 **********************************************************************/
void
ixgbe_msix_que(void *arg)
{
	struct ix_queue	*que = arg;
	struct adapter  *adapter = que->adapter;
	struct ifnet    *ifp = adapter->ifp;
	struct tx_ring	*txr = que->txr;
	struct rx_ring	*rxr = que->rxr;
	bool		more;
	u32		newitr = 0;

	/* Protect against spurious interrupts */
	if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0)
		return;

	ixgbe_disable_queue(adapter, que->msix);
	++que->irqs;

	more = ixgbe_rxeof(que);

	IXGBE_TX_LOCK(txr);
	ixgbe_txeof(txr);
#ifdef IXGBE_LEGACY_TX
	if (!IFQ_DRV_IS_EMPTY(ifp->if_snd))
		ixgbe_start_locked(txr, ifp);
#else
	if (!drbr_empty(ifp, txr->br))
		ixgbe_mq_start_locked(ifp, txr);
#endif
	IXGBE_TX_UNLOCK(txr);

	/* Do AIM now? */

	if (ixgbe_enable_aim == FALSE)
		goto no_calc;
	/*
	** Do Adaptive Interrupt Moderation:
        **  - Write out last calculated setting
	**  - Calculate based on average size over
	**    the last interval.
	*/
        if (que->eitr_setting)
                IXGBE_WRITE_REG(&adapter->hw,
                    IXGBE_EITR(que->msix), que->eitr_setting);

        que->eitr_setting = 0;

        /* Idle, do nothing */
        if ((txr->bytes == 0) && (rxr->bytes == 0))
                goto no_calc;

	if ((txr->bytes) && (txr->packets))
               	newitr = txr->bytes/txr->packets;
	if ((rxr->bytes) && (rxr->packets))
		newitr = max(newitr,
		    (rxr->bytes / rxr->packets));
	newitr += 24; /* account for hardware frame, crc */

	/* set an upper boundary */
	newitr = min(newitr, 3000);

	/* Be nice to the mid range */
	if ((newitr > 300) && (newitr < 1200))
		newitr = (newitr / 3);
	else
		newitr = (newitr / 2);

        if (adapter->hw.mac.type == ixgbe_mac_82598EB)
                newitr |= newitr << 16;
        else
                newitr |= IXGBE_EITR_CNT_WDIS;

        /* save for next interrupt */
        que->eitr_setting = newitr;

        /* Reset state */
        txr->bytes = 0;
        txr->packets = 0;
        rxr->bytes = 0;
        rxr->packets = 0;

no_calc:
	if (more)
		taskqueue_enqueue(que->tq, &que->que_task);
	else
		ixgbe_enable_queue(adapter, que->msix);
	return;
}


static void
ixgbe_msix_link(void *arg)
{
	struct adapter	*adapter = arg;
	struct ixgbe_hw *hw = &adapter->hw;
	u32		reg_eicr, mod_mask;

	++adapter->link_irq;

	/* First get the cause */
	reg_eicr = IXGBE_READ_REG(hw, IXGBE_EICS);
	/* Be sure the queue bits are not cleared */
	reg_eicr &= ~IXGBE_EICR_RTX_QUEUE;
	/* Clear interrupt with write */
	IXGBE_WRITE_REG(hw, IXGBE_EICR, reg_eicr);

	/* Link status change */
	if (reg_eicr & IXGBE_EICR_LSC)
		taskqueue_enqueue(adapter->tq, &adapter->link_task);

	if (adapter->hw.mac.type != ixgbe_mac_82598EB) {
#ifdef IXGBE_FDIR
		if (reg_eicr & IXGBE_EICR_FLOW_DIR) {
			/* This is probably overkill :) */
			if (!atomic_cmpset_int(&adapter->fdir_reinit, 0, 1))
				return;
                	/* Disable the interrupt */
			IXGBE_WRITE_REG(hw, IXGBE_EIMC, IXGBE_EICR_FLOW_DIR);
			taskqueue_enqueue(adapter->tq, &adapter->fdir_task);
		} else
#endif
		if (reg_eicr & IXGBE_EICR_ECC) {
                	device_printf(adapter->dev, "\nCRITICAL: ECC ERROR!! "
			    "Please Reboot!!\n");
			IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_ECC);
		}

		/* Check for over temp condition */
		if (reg_eicr & IXGBE_EICR_TS) {
			device_printf(adapter->dev, "\nCRITICAL: OVER TEMP!! "
			    "PHY IS SHUT DOWN!!\n");
			device_printf(adapter->dev, "System shutdown required!\n");
			IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_TS);
		}
	}

	/* Pluggable optics-related interrupt */
	if (hw->device_id == IXGBE_DEV_ID_X550EM_X_SFP)
		mod_mask = IXGBE_EICR_GPI_SDP0_X540;
	else
		mod_mask = IXGBE_EICR_GPI_SDP2_BY_MAC(hw);

	if (ixgbe_is_sfp(hw)) {
		if (reg_eicr & IXGBE_EICR_GPI_SDP1_BY_MAC(hw)) {
			IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_GPI_SDP1_BY_MAC(hw));
			taskqueue_enqueue(adapter->tq, &adapter->msf_task);
		} else if (reg_eicr & mod_mask) {
			IXGBE_WRITE_REG(hw, IXGBE_EICR, mod_mask);
			taskqueue_enqueue(adapter->tq, &adapter->mod_task);
		}
	}

	/* Check for fan failure */
	if ((hw->device_id == IXGBE_DEV_ID_82598AT) &&
	    (reg_eicr & IXGBE_EICR_GPI_SDP1)) {
		IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_GPI_SDP1);
                device_printf(adapter->dev, "\nCRITICAL: FAN FAILURE!! "
		    "REPLACE IMMEDIATELY!!\n");
	}

	/* External PHY interrupt */
	if (hw->device_id == IXGBE_DEV_ID_X550EM_X_10G_T &&
	    (reg_eicr & IXGBE_EICR_GPI_SDP0_X540)) {
		IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_GPI_SDP0_X540);
		taskqueue_enqueue(adapter->tq, &adapter->phy_task);
	}

	IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMS, IXGBE_EIMS_OTHER);
	return;
}

/*********************************************************************
 *
 *  Media Ioctl callback
 *
 *  This routine is called whenever the user queries the status of
 *  the interface using ifconfig.
 *
 **********************************************************************/
static void
ixgbe_media_status(struct ifnet * ifp, struct ifmediareq * ifmr)
{
	struct adapter *adapter = ifp->if_softc;
	struct ixgbe_hw *hw = &adapter->hw;
	int layer;

	INIT_DEBUGOUT("ixgbe_media_status: begin");
	IXGBE_CORE_LOCK(adapter);
	ixgbe_update_link_status(adapter);

	ifmr->ifm_status = IFM_AVALID;
	ifmr->ifm_active = IFM_ETHER;

	if (!adapter->link_active) {
		IXGBE_CORE_UNLOCK(adapter);
		return;
	}

	ifmr->ifm_status |= IFM_ACTIVE;
	layer = ixgbe_get_supported_physical_layer(hw);

	if (layer & IXGBE_PHYSICAL_LAYER_10GBASE_T ||
	    layer & IXGBE_PHYSICAL_LAYER_1000BASE_T ||
	    layer & IXGBE_PHYSICAL_LAYER_100BASE_TX)
		switch (adapter->link_speed) {
		case IXGBE_LINK_SPEED_10GB_FULL:
			ifmr->ifm_active |= IFM_10G_T | IFM_FDX;
			break;
		case IXGBE_LINK_SPEED_1GB_FULL:
			ifmr->ifm_active |= IFM_1000_T | IFM_FDX;
			break;
		case IXGBE_LINK_SPEED_100_FULL:
			ifmr->ifm_active |= IFM_100_TX | IFM_FDX;
			break;
		}
	if (layer & IXGBE_PHYSICAL_LAYER_SFP_PLUS_CU ||
	    layer & IXGBE_PHYSICAL_LAYER_SFP_ACTIVE_DA)
		switch (adapter->link_speed) {
		case IXGBE_LINK_SPEED_10GB_FULL:
			ifmr->ifm_active |= IFM_10G_TWINAX | IFM_FDX;
			break;
		}
	if (layer & IXGBE_PHYSICAL_LAYER_10GBASE_LR)
		switch (adapter->link_speed) {
		case IXGBE_LINK_SPEED_10GB_FULL:
			ifmr->ifm_active |= IFM_10G_LR | IFM_FDX;
			break;
		case IXGBE_LINK_SPEED_1GB_FULL:
			ifmr->ifm_active |= IFM_1000_LX | IFM_FDX;
			break;
		}
	if (layer & IXGBE_PHYSICAL_LAYER_10GBASE_LRM)
		switch (adapter->link_speed) {
		case IXGBE_LINK_SPEED_10GB_FULL:
			ifmr->ifm_active |= IFM_10G_LRM | IFM_FDX;
			break;
		case IXGBE_LINK_SPEED_1GB_FULL:
			ifmr->ifm_active |= IFM_1000_LX | IFM_FDX;
			break;
		}
	if (layer & IXGBE_PHYSICAL_LAYER_10GBASE_SR ||
	    layer & IXGBE_PHYSICAL_LAYER_1000BASE_SX)
		switch (adapter->link_speed) {
		case IXGBE_LINK_SPEED_10GB_FULL:
			ifmr->ifm_active |= IFM_10G_SR | IFM_FDX;
			break;
		case IXGBE_LINK_SPEED_1GB_FULL:
			ifmr->ifm_active |= IFM_1000_SX | IFM_FDX;
			break;
		}
	if (layer & IXGBE_PHYSICAL_LAYER_10GBASE_CX4)
		switch (adapter->link_speed) {
		case IXGBE_LINK_SPEED_10GB_FULL:
			ifmr->ifm_active |= IFM_10G_CX4 | IFM_FDX;
			break;
		}
	/*
	** XXX: These need to use the proper media types once
	** they're added.
	*/
	if (layer & IXGBE_PHYSICAL_LAYER_10GBASE_KR)
		switch (adapter->link_speed) {
		case IXGBE_LINK_SPEED_10GB_FULL:
			ifmr->ifm_active |= IFM_10G_SR | IFM_FDX;
			break;
		case IXGBE_LINK_SPEED_2_5GB_FULL:
			ifmr->ifm_active |= IFM_2500_SX | IFM_FDX;
			break;
		case IXGBE_LINK_SPEED_1GB_FULL:
			ifmr->ifm_active |= IFM_1000_CX | IFM_FDX;
			break;
		}
	else if (layer & IXGBE_PHYSICAL_LAYER_10GBASE_KX4
	    || layer & IXGBE_PHYSICAL_LAYER_1000BASE_KX)
		switch (adapter->link_speed) {
		case IXGBE_LINK_SPEED_10GB_FULL:
			ifmr->ifm_active |= IFM_10G_CX4 | IFM_FDX;
			break;
		case IXGBE_LINK_SPEED_2_5GB_FULL:
			ifmr->ifm_active |= IFM_2500_SX | IFM_FDX;
			break;
		case IXGBE_LINK_SPEED_1GB_FULL:
			ifmr->ifm_active |= IFM_1000_CX | IFM_FDX;
			break;
		}

	/* If nothing is recognized... */
	if (IFM_SUBTYPE(ifmr->ifm_active) == 0)
		ifmr->ifm_active |= IFM_UNKNOWN;

#if __FreeBSD_version >= 900025
	/* Display current flow control setting used on link */
	if (hw->fc.current_mode == ixgbe_fc_rx_pause ||
	    hw->fc.current_mode == ixgbe_fc_full)
		ifmr->ifm_active |= IFM_ETH_RXPAUSE;
	if (hw->fc.current_mode == ixgbe_fc_tx_pause ||
	    hw->fc.current_mode == ixgbe_fc_full)
		ifmr->ifm_active |= IFM_ETH_TXPAUSE;
#endif

	IXGBE_CORE_UNLOCK(adapter);

	return;
}

/*********************************************************************
 *
 *  Media Ioctl callback
 *
 *  This routine is called when the user changes speed/duplex using
 *  media/mediopt option with ifconfig.
 *
 **********************************************************************/
static int
ixgbe_media_change(struct ifnet * ifp)
{
	struct adapter *adapter = ifp->if_softc;
	struct ifmedia *ifm = &adapter->media;
	struct ixgbe_hw *hw = &adapter->hw;
	ixgbe_link_speed speed = 0;

	INIT_DEBUGOUT("ixgbe_media_change: begin");

	if (IFM_TYPE(ifm->ifm_media) != IFM_ETHER)
		return (EINVAL);

	if (hw->phy.media_type == ixgbe_media_type_backplane)
		return (EPERM);

	/*
	** We don't actually need to check against the supported
	** media types of the adapter; ifmedia will take care of
	** that for us.
	*/
	switch (IFM_SUBTYPE(ifm->ifm_media)) {
		case IFM_AUTO:
		case IFM_10G_T:
			speed |= IXGBE_LINK_SPEED_100_FULL;
		case IFM_10G_LRM:
		case IFM_10G_SR: /* KR, too */
		case IFM_10G_LR:
		case IFM_10G_CX4: /* KX4 */
			speed |= IXGBE_LINK_SPEED_1GB_FULL;
		case IFM_10G_TWINAX:
			speed |= IXGBE_LINK_SPEED_10GB_FULL;
			break;
		case IFM_1000_T:
			speed |= IXGBE_LINK_SPEED_100_FULL;
		case IFM_1000_LX:
		case IFM_1000_SX:
		case IFM_1000_CX: /* KX */
			speed |= IXGBE_LINK_SPEED_1GB_FULL;
			break;
		case IFM_100_TX:
			speed |= IXGBE_LINK_SPEED_100_FULL;
			break;
		default:
			goto invalid;
	}

	hw->mac.autotry_restart = TRUE;
	hw->mac.ops.setup_link(hw, speed, TRUE);
	adapter->advertise =
		((speed & IXGBE_LINK_SPEED_10GB_FULL) << 2) |
		((speed & IXGBE_LINK_SPEED_1GB_FULL) << 1) |
		((speed & IXGBE_LINK_SPEED_100_FULL) << 0);

	return (0);

invalid:
	device_printf(adapter->dev, "Invalid media type!\n");
	return (EINVAL);
}

static void
ixgbe_set_promisc(struct adapter *adapter)
{
	u_int32_t       reg_rctl;
	struct ifnet   *ifp = adapter->ifp;
	int		mcnt = 0;

	reg_rctl = IXGBE_READ_REG(&adapter->hw, IXGBE_FCTRL);
	reg_rctl &= (~IXGBE_FCTRL_UPE);
	if (ifp->if_flags & IFF_ALLMULTI)
		mcnt = MAX_NUM_MULTICAST_ADDRESSES;
	else {
		struct	ifmultiaddr *ifma;
#if __FreeBSD_version < 800000
		IF_ADDR_LOCK(ifp);
#else
		if_maddr_rlock(ifp);
#endif
		TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) {
			if (ifma->ifma_addr->sa_family != AF_LINK)
				continue;
			if (mcnt == MAX_NUM_MULTICAST_ADDRESSES)
				break;
			mcnt++;
		}
#if __FreeBSD_version < 800000
		IF_ADDR_UNLOCK(ifp);
#else
		if_maddr_runlock(ifp);
#endif
	}
	if (mcnt < MAX_NUM_MULTICAST_ADDRESSES)
		reg_rctl &= (~IXGBE_FCTRL_MPE);
	IXGBE_WRITE_REG(&adapter->hw, IXGBE_FCTRL, reg_rctl);

	if (ifp->if_flags & IFF_PROMISC) {
		reg_rctl |= (IXGBE_FCTRL_UPE | IXGBE_FCTRL_MPE);
		IXGBE_WRITE_REG(&adapter->hw, IXGBE_FCTRL, reg_rctl);
	} else if (ifp->if_flags & IFF_ALLMULTI) {
		reg_rctl |= IXGBE_FCTRL_MPE;
		reg_rctl &= ~IXGBE_FCTRL_UPE;
		IXGBE_WRITE_REG(&adapter->hw, IXGBE_FCTRL, reg_rctl);
	}
	return;
}


/*********************************************************************
 *  Multicast Update
 *
 *  This routine is called whenever multicast address list is updated.
 *
 **********************************************************************/
#define IXGBE_RAR_ENTRIES 16

static void
ixgbe_set_multi(struct adapter *adapter)
{
	u32	fctrl;
	u8	*mta;
	u8	*update_ptr;
	struct	ifmultiaddr *ifma;
	int	mcnt = 0;
	struct ifnet   *ifp = adapter->ifp;

	IOCTL_DEBUGOUT("ixgbe_set_multi: begin");

	mta = adapter->mta;
	bzero(mta, sizeof(u8) * IXGBE_ETH_LENGTH_OF_ADDRESS *
	    MAX_NUM_MULTICAST_ADDRESSES);

#if __FreeBSD_version < 800000
	IF_ADDR_LOCK(ifp);
#else
	if_maddr_rlock(ifp);
#endif
	TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) {
		if (ifma->ifma_addr->sa_family != AF_LINK)
			continue;
		if (mcnt == MAX_NUM_MULTICAST_ADDRESSES)
			break;
		bcopy(LLADDR((struct sockaddr_dl *) ifma->ifma_addr),
		    &mta[mcnt * IXGBE_ETH_LENGTH_OF_ADDRESS],
		    IXGBE_ETH_LENGTH_OF_ADDRESS);
		mcnt++;
	}
#if __FreeBSD_version < 800000
	IF_ADDR_UNLOCK(ifp);
#else
	if_maddr_runlock(ifp);
#endif

	fctrl = IXGBE_READ_REG(&adapter->hw, IXGBE_FCTRL);
	fctrl |= (IXGBE_FCTRL_UPE | IXGBE_FCTRL_MPE);
	if (ifp->if_flags & IFF_PROMISC)
		fctrl |= (IXGBE_FCTRL_UPE | IXGBE_FCTRL_MPE);
	else if (mcnt >= MAX_NUM_MULTICAST_ADDRESSES ||
	    ifp->if_flags & IFF_ALLMULTI) {
		fctrl |= IXGBE_FCTRL_MPE;
		fctrl &= ~IXGBE_FCTRL_UPE;
	} else
		fctrl &= ~(IXGBE_FCTRL_UPE | IXGBE_FCTRL_MPE);

	IXGBE_WRITE_REG(&adapter->hw, IXGBE_FCTRL, fctrl);

	if (mcnt < MAX_NUM_MULTICAST_ADDRESSES) {
		update_ptr = mta;
		ixgbe_update_mc_addr_list(&adapter->hw,
		    update_ptr, mcnt, ixgbe_mc_array_itr, TRUE);
	}

	return;
}

/*
 * This is an iterator function now needed by the multicast
 * shared code. It simply feeds the shared code routine the
 * addresses in the array of ixgbe_set_multi() one by one.
 */
static u8 *
ixgbe_mc_array_itr(struct ixgbe_hw *hw, u8 **update_ptr, u32 *vmdq)
{
	u8 *addr = *update_ptr;
	u8 *newptr;
	*vmdq = 0;

	newptr = addr + IXGBE_ETH_LENGTH_OF_ADDRESS;
	*update_ptr = newptr;
	return addr;
}


/*********************************************************************
 *  Timer routine
 *
 *  This routine checks for link status,updates statistics,
 *  and runs the watchdog check.
 *
 **********************************************************************/

static void
ixgbe_local_timer(void *arg)
{
	struct adapter	*adapter = arg;
	device_t	dev = adapter->dev;
	struct ix_queue *que = adapter->queues;
	u64		queues = 0;
	int		hung = 0;

	mtx_assert(&adapter->core_mtx, MA_OWNED);

	/* Check for pluggable optics */
	if (adapter->sfp_probe)
		if (!ixgbe_sfp_probe(adapter))
			goto out; /* Nothing to do */

	ixgbe_update_link_status(adapter);
	ixgbe_update_stats_counters(adapter);

	/*
	** Check the TX queues status
	**	- mark hung queues so we don't schedule on them
	**      - watchdog only if all queues show hung
	*/
	for (int i = 0; i < adapter->num_queues; i++, que++) {
		/* Keep track of queues with work for soft irq */
		if (que->txr->busy)
			queues |= ((u64)1 << que->me);
		/*
		** Each time txeof runs without cleaning, but there
		** are uncleaned descriptors it increments busy. If
		** we get to the MAX we declare it hung.
		*/
		if (que->busy == IXGBE_QUEUE_HUNG) {
			++hung;
			/* Mark the queue as inactive */
			adapter->active_queues &= ~((u64)1 << que->me);
			continue;
		} else {
			/* Check if we've come back from hung */
			if ((adapter->active_queues & ((u64)1 << que->me)) == 0)
                                adapter->active_queues |= ((u64)1 << que->me);
		}
		if (que->busy >= IXGBE_MAX_TX_BUSY) {
			device_printf(dev,"Warning queue %d "
			    "appears to be hung!\n", i);
			que->txr->busy = IXGBE_QUEUE_HUNG;
			++hung;
		}

	}

	/* Only truly watchdog if all queues show hung */
	if (hung == adapter->num_queues)
		goto watchdog;
	else if (queues != 0) { /* Force an IRQ on queues with work */
		ixgbe_rearm_queues(adapter, queues);
	}

out:
	callout_reset(&adapter->timer, hz, ixgbe_local_timer, adapter);
	return;

watchdog:
	device_printf(adapter->dev, "Watchdog timeout -- resetting\n");
	adapter->ifp->if_drv_flags &= ~IFF_DRV_RUNNING;
	adapter->watchdog_events++;
	ixgbe_init_locked(adapter);
}

/*
** Note: this routine updates the OS on the link state
**	the real check of the hardware only happens with
**	a link interrupt.
*/
static void
ixgbe_update_link_status(struct adapter *adapter)
{
	struct ifnet	*ifp = adapter->ifp;
	device_t dev = adapter->dev;

	if (adapter->link_up){
		if (adapter->link_active == FALSE) {
			if (bootverbose)
				device_printf(dev,"Link is up %d Gbps %s \n",
				    ((adapter->link_speed == 128)? 10:1),
				    "Full Duplex");
			adapter->link_active = TRUE;
			/* Update any Flow Control changes */
			ixgbe_fc_enable(&adapter->hw);
			/* Update DMA coalescing config */
			ixgbe_config_dmac(adapter);
			if_link_state_change(ifp, LINK_STATE_UP);
		}
	} else { /* Link down */
		if (adapter->link_active == TRUE) {
			if (bootverbose)
				device_printf(dev,"Link is Down\n");
			if_link_state_change(ifp, LINK_STATE_DOWN);
			adapter->link_active = FALSE;
		}
	}

	return;
}


/*********************************************************************
 *
 *  This routine disables all traffic on the adapter by issuing a
 *  global reset on the MAC and deallocates TX/RX buffers.
 *
 **********************************************************************/

static void
ixgbe_stop(void *arg)
{
	struct ifnet   *ifp;
	struct adapter *adapter = arg;
	struct ixgbe_hw *hw = &adapter->hw;
	ifp = adapter->ifp;

	mtx_assert(&adapter->core_mtx, MA_OWNED);

	INIT_DEBUGOUT("ixgbe_stop: begin\n");
	ixgbe_disable_intr(adapter);
	callout_stop(&adapter->timer);

	/* Let the stack know...*/
	ifp->if_drv_flags &= ~IFF_DRV_RUNNING;

	ixgbe_reset_hw(hw);
	hw->adapter_stopped = FALSE;
	ixgbe_stop_adapter(hw);
	if (hw->mac.type == ixgbe_mac_82599EB)
		ixgbe_stop_mac_link_on_d3_82599(hw);
	/* Turn off the laser - noop with no optics */
	ixgbe_disable_tx_laser(hw);

	/* Update the stack */
	adapter->link_up = FALSE;
       	ixgbe_update_link_status(adapter);

	/* reprogram the RAR[0] in case user changed it. */
	ixgbe_set_rar(&adapter->hw, 0, adapter->hw.mac.addr, 0, IXGBE_RAH_AV);

	return;
}


/*********************************************************************
 *
 *  Determine hardware revision.
 *
 **********************************************************************/
static void
ixgbe_identify_hardware(struct adapter *adapter)
{
	device_t        dev = adapter->dev;
	struct ixgbe_hw *hw = &adapter->hw;

	/* Save off the information about this board */
	hw->vendor_id = pci_get_vendor(dev);
	hw->device_id = pci_get_device(dev);
	hw->revision_id = pci_read_config(dev, PCIR_REVID, 1);
	hw->subsystem_vendor_id =
	    pci_read_config(dev, PCIR_SUBVEND_0, 2);
	hw->subsystem_device_id =
	    pci_read_config(dev, PCIR_SUBDEV_0, 2);

	/*
	** Make sure BUSMASTER is set
	*/
	pci_enable_busmaster(dev);

	/* We need this here to set the num_segs below */
	ixgbe_set_mac_type(hw);

	/* Pick up the 82599 settings */
	if (hw->mac.type != ixgbe_mac_82598EB) {
		hw->phy.smart_speed = ixgbe_smart_speed;
		adapter->num_segs = IXGBE_82599_SCATTER;
	} else
		adapter->num_segs = IXGBE_82598_SCATTER;

	return;
}

/*********************************************************************
 *
 *  Determine optic type
 *
 **********************************************************************/
static void
ixgbe_setup_optics(struct adapter *adapter)
{
	struct ixgbe_hw *hw = &adapter->hw;
	int		layer;

	layer = ixgbe_get_supported_physical_layer(hw);

	if (layer & IXGBE_PHYSICAL_LAYER_10GBASE_T) {
		adapter->optics = IFM_10G_T;
		return;
	}

	if (layer & IXGBE_PHYSICAL_LAYER_1000BASE_T) {
		adapter->optics = IFM_1000_T;
		return;
	}

	if (layer & IXGBE_PHYSICAL_LAYER_1000BASE_SX) {
		adapter->optics = IFM_1000_SX;
		return;
	}

	if (layer & (IXGBE_PHYSICAL_LAYER_10GBASE_LR |
	    IXGBE_PHYSICAL_LAYER_10GBASE_LRM)) {
		adapter->optics = IFM_10G_LR;
		return;
	}

	if (layer & IXGBE_PHYSICAL_LAYER_10GBASE_SR) {
		adapter->optics = IFM_10G_SR;
		return;
	}

	if (layer & IXGBE_PHYSICAL_LAYER_SFP_PLUS_CU) {
		adapter->optics = IFM_10G_TWINAX;
		return;
	}

	if (layer & (IXGBE_PHYSICAL_LAYER_10GBASE_KX4 |
	    IXGBE_PHYSICAL_LAYER_10GBASE_CX4)) {
		adapter->optics = IFM_10G_CX4;
		return;
	}

	/* If we get here just set the default */
	adapter->optics = IFM_ETHER | IFM_AUTO;
	return;
}

/*********************************************************************
 *
 *  Setup the Legacy or MSI Interrupt handler
 *
 **********************************************************************/
static int
ixgbe_allocate_legacy(struct adapter *adapter)
{
	device_t	dev = adapter->dev;
	struct		ix_queue *que = adapter->queues;
#ifndef IXGBE_LEGACY_TX
	struct tx_ring		*txr = adapter->tx_rings;
#endif
	int		error, rid = 0;

	/* MSI RID at 1 */
	if (adapter->msix == 1)
		rid = 1;

	/* We allocate a single interrupt resource */
	adapter->res = bus_alloc_resource_any(dev,
            SYS_RES_IRQ, &rid, RF_SHAREABLE | RF_ACTIVE);
	if (adapter->res == NULL) {
		device_printf(dev, "Unable to allocate bus resource: "
		    "interrupt\n");
		return (ENXIO);
	}

	/*
	 * Try allocating a fast interrupt and the associated deferred
	 * processing contexts.
	 */
#ifndef IXGBE_LEGACY_TX
	TASK_INIT(&txr->txq_task, 0, ixgbe_deferred_mq_start, txr);
#endif
	TASK_INIT(&que->que_task, 0, ixgbe_handle_que, que);
	que->tq = taskqueue_create_fast("ixgbe_que", M_NOWAIT,
            taskqueue_thread_enqueue, &que->tq);
	taskqueue_start_threads(&que->tq, 1, PI_NET, "%s ixq",
            device_get_nameunit(adapter->dev));

	/* Tasklets for Link, SFP and Multispeed Fiber */
	TASK_INIT(&adapter->link_task, 0, ixgbe_handle_link, adapter);
	TASK_INIT(&adapter->mod_task, 0, ixgbe_handle_mod, adapter);
	TASK_INIT(&adapter->msf_task, 0, ixgbe_handle_msf, adapter);
	TASK_INIT(&adapter->phy_task, 0, ixgbe_handle_phy, adapter);
#ifdef IXGBE_FDIR
	TASK_INIT(&adapter->fdir_task, 0, ixgbe_reinit_fdir, adapter);
#endif
	adapter->tq = taskqueue_create_fast("ixgbe_link", M_NOWAIT,
	    taskqueue_thread_enqueue, &adapter->tq);
	taskqueue_start_threads(&adapter->tq, 1, PI_NET, "%s linkq",
	    device_get_nameunit(adapter->dev));

	if ((error = bus_setup_intr(dev, adapter->res,
            INTR_TYPE_NET | INTR_MPSAFE, NULL, ixgbe_legacy_irq,
            que, &adapter->tag)) != 0) {
		device_printf(dev, "Failed to register fast interrupt "
		    "handler: %d\n", error);
		taskqueue_free(que->tq);
		taskqueue_free(adapter->tq);
		que->tq = NULL;
		adapter->tq = NULL;
		return (error);
	}
	/* For simplicity in the handlers */
	adapter->active_queues = IXGBE_EIMS_ENABLE_MASK;

	return (0);
}


/*********************************************************************
 *
 *  Setup MSIX Interrupt resources and handlers
 *
 **********************************************************************/
static int
ixgbe_allocate_msix(struct adapter *adapter)
{
	device_t        dev = adapter->dev;
	struct 		ix_queue *que = adapter->queues;
	struct  	tx_ring *txr = adapter->tx_rings;
	int 		error, rid, vector = 0;
	int		cpu_id = 0;
#ifdef	RSS
	cpuset_t	cpu_mask;
#endif

#ifdef	RSS
	/*
	 * If we're doing RSS, the number of queues needs to
	 * match the number of RSS buckets that are configured.
	 *
	 * + If there's more queues than RSS buckets, we'll end
	 *   up with queues that get no traffic.
	 *
	 * + If there's more RSS buckets than queues, we'll end
	 *   up having multiple RSS buckets map to the same queue,
	 *   so there'll be some contention.
	 */
	if (adapter->num_queues != rss_getnumbuckets()) {
		device_printf(dev,
		    "%s: number of queues (%d) != number of RSS buckets (%d)"
		    "; performance will be impacted.\n",
		    __func__,
		    adapter->num_queues,
		    rss_getnumbuckets());
	}
#endif

	for (int i = 0; i < adapter->num_queues; i++, vector++, que++, txr++) {
		rid = vector + 1;
		que->res = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid,
		    RF_SHAREABLE | RF_ACTIVE);
		if (que->res == NULL) {
			device_printf(dev,"Unable to allocate"
		    	    " bus resource: que interrupt [%d]\n", vector);
			return (ENXIO);
		}
		/* Set the handler function */
		error = bus_setup_intr(dev, que->res,
		    INTR_TYPE_NET | INTR_MPSAFE, NULL,
		    ixgbe_msix_que, que, &que->tag);
		if (error) {
			que->res = NULL;
			device_printf(dev, "Failed to register QUE handler");
			return (error);
		}
#if __FreeBSD_version >= 800504
		bus_describe_intr(dev, que->res, que->tag, "que %d", i);
#endif
		que->msix = vector;
		adapter->active_queues |= (u64)(1 << que->msix);
#ifdef	RSS
		/*
		 * The queue ID is used as the RSS layer bucket ID.
		 * We look up the queue ID -> RSS CPU ID and select
		 * that.
		 */
		cpu_id = rss_getcpu(i % rss_getnumbuckets());
#else
		/*
		 * Bind the msix vector, and thus the
		 * rings to the corresponding cpu.
		 *
		 * This just happens to match the default RSS round-robin
		 * bucket -> queue -> CPU allocation.
		 */
		if (adapter->num_queues > 1)
			cpu_id = i;
#endif
		if (adapter->num_queues > 1)
			bus_bind_intr(dev, que->res, cpu_id);

#ifdef	RSS
		device_printf(dev,
		    "Bound RSS bucket %d to CPU %d\n",
		    i, cpu_id);
#else
		if (bootverbose)
			device_printf(dev,
			    "Bound queue %d to cpu %d\n",
			    i, cpu_id);
#endif
#ifndef IXGBE_LEGACY_TX
		TASK_INIT(&txr->txq_task, 0, ixgbe_deferred_mq_start, txr);
#endif
		TASK_INIT(&que->que_task, 0, ixgbe_handle_que, que);
		que->tq = taskqueue_create_fast("ixgbe_que", M_NOWAIT,
		    taskqueue_thread_enqueue, &que->tq);
#ifdef	RSS
		CPU_SETOF(cpu_id, &cpu_mask);
		taskqueue_start_threads_cpuset(&que->tq, 1, PI_NET,
		    &cpu_mask,
		    "%s (bucket %d)",
		    device_get_nameunit(adapter->dev),
		    cpu_id);
#else
		taskqueue_start_threads(&que->tq, 1, PI_NET, "%s que",
		    device_get_nameunit(adapter->dev));
#endif
	}

	/* and Link */
	rid = vector + 1;
	adapter->res = bus_alloc_resource_any(dev,
    	    SYS_RES_IRQ, &rid, RF_SHAREABLE | RF_ACTIVE);
	if (!adapter->res) {
		device_printf(dev,"Unable to allocate"
    	    " bus resource: Link interrupt [%d]\n", rid);
		return (ENXIO);
	}
	/* Set the link handler function */
	error = bus_setup_intr(dev, adapter->res,
	    INTR_TYPE_NET | INTR_MPSAFE, NULL,
	    ixgbe_msix_link, adapter, &adapter->tag);
	if (error) {
		adapter->res = NULL;
		device_printf(dev, "Failed to register LINK handler");
		return (error);
	}
#if __FreeBSD_version >= 800504
	bus_describe_intr(dev, adapter->res, adapter->tag, "link");
#endif
	adapter->vector = vector;
	/* Tasklets for Link, SFP and Multispeed Fiber */
	TASK_INIT(&adapter->link_task, 0, ixgbe_handle_link, adapter);
	TASK_INIT(&adapter->mod_task, 0, ixgbe_handle_mod, adapter);
	TASK_INIT(&adapter->msf_task, 0, ixgbe_handle_msf, adapter);
	TASK_INIT(&adapter->phy_task, 0, ixgbe_handle_phy, adapter);
#ifdef IXGBE_FDIR
	TASK_INIT(&adapter->fdir_task, 0, ixgbe_reinit_fdir, adapter);
#endif
	adapter->tq = taskqueue_create_fast("ixgbe_link", M_NOWAIT,
	    taskqueue_thread_enqueue, &adapter->tq);
	taskqueue_start_threads(&adapter->tq, 1, PI_NET, "%s linkq",
	    device_get_nameunit(adapter->dev));

	return (0);
}

/*
 * Setup Either MSI/X or MSI
 */
static int
ixgbe_setup_msix(struct adapter *adapter)
{
	device_t dev = adapter->dev;
	int rid, want, queues, msgs;

	/* Override by tuneable */
	if (ixgbe_enable_msix == 0)
		goto msi;

	/* First try MSI/X */
	msgs = pci_msix_count(dev);
	if (msgs == 0)
		goto msi;
	rid = PCIR_BAR(MSIX_82598_BAR);
	adapter->msix_mem = bus_alloc_resource_any(dev,
	    SYS_RES_MEMORY, &rid, RF_ACTIVE);
       	if (adapter->msix_mem == NULL) {
		rid += 4;	/* 82599 maps in higher BAR */
		adapter->msix_mem = bus_alloc_resource_any(dev,
		    SYS_RES_MEMORY, &rid, RF_ACTIVE);
	}
       	if (adapter->msix_mem == NULL) {
		/* May not be enabled */
		device_printf(adapter->dev,
		    "Unable to map MSIX table \n");
		goto msi;
	}

	/* Figure out a reasonable auto config value */
	queues = (mp_ncpus > (msgs-1)) ? (msgs-1) : mp_ncpus;

#ifdef	RSS
	/* If we're doing RSS, clamp at the number of RSS buckets */
	if (queues > rss_getnumbuckets())
		queues = rss_getnumbuckets();
#endif

	if (ixgbe_num_queues != 0)
		queues = ixgbe_num_queues;

	/* reflect correct sysctl value */
	ixgbe_num_queues = queues;

	/*
	** Want one vector (RX/TX pair) per queue
	** plus an additional for Link.
	*/
	want = queues + 1;
	if (msgs >= want)
		msgs = want;
	else {
               	device_printf(adapter->dev,
		    "MSIX Configuration Problem, "
		    "%d vectors but %d queues wanted!\n",
		    msgs, want);
		goto msi;
	}
	if ((pci_alloc_msix(dev, &msgs) == 0) && (msgs == want)) {
               	device_printf(adapter->dev,
		    "Using MSIX interrupts with %d vectors\n", msgs);
		adapter->num_queues = queues;
		return (msgs);
	}
	/*
	** If MSIX alloc failed or provided us with
	** less than needed, free and fall through to MSI
	*/
	pci_release_msi(dev);

msi:
       	if (adapter->msix_mem != NULL) {
		bus_release_resource(dev, SYS_RES_MEMORY,
		    rid, adapter->msix_mem);
		adapter->msix_mem = NULL;
	}
       	msgs = 1;
       	if (pci_alloc_msi(dev, &msgs) == 0) {
               	device_printf(adapter->dev,"Using an MSI interrupt\n");
		return (msgs);
	}
	device_printf(adapter->dev,"Using a Legacy interrupt\n");
	return (0);
}


static int
ixgbe_allocate_pci_resources(struct adapter *adapter)
{
	int             rid;
	device_t        dev = adapter->dev;

	rid = PCIR_BAR(0);
	adapter->pci_mem = bus_alloc_resource_any(dev, SYS_RES_MEMORY,
	    &rid, RF_ACTIVE);

	if (!(adapter->pci_mem)) {
		device_printf(dev,"Unable to allocate bus resource: memory\n");
		return (ENXIO);
	}

	adapter->osdep.mem_bus_space_tag =
		rman_get_bustag(adapter->pci_mem);
	adapter->osdep.mem_bus_space_handle =
		rman_get_bushandle(adapter->pci_mem);
	adapter->hw.hw_addr = (u8 *) &adapter->osdep.mem_bus_space_handle;

	/* Legacy defaults */
	adapter->num_queues = 1;
	adapter->hw.back = &adapter->osdep;

	/*
	** Now setup MSI or MSI/X, should
	** return us the number of supported
	** vectors. (Will be 1 for MSI)
	*/
	adapter->msix = ixgbe_setup_msix(adapter);
	return (0);
}

static void
ixgbe_free_pci_resources(struct adapter * adapter)
{
	struct 		ix_queue *que = adapter->queues;
	device_t	dev = adapter->dev;
	int		rid, memrid;

	if (adapter->hw.mac.type == ixgbe_mac_82598EB)
		memrid = PCIR_BAR(MSIX_82598_BAR);
	else
		memrid = PCIR_BAR(MSIX_82599_BAR);

	/*
	** There is a slight possibility of a failure mode
	** in attach that will result in entering this function
	** before interrupt resources have been initialized, and
	** in that case we do not want to execute the loops below
	** We can detect this reliably by the state of the adapter
	** res pointer.
	*/
	if (adapter->res == NULL)
		goto mem;

	/*
	**  Release all msix queue resources:
	*/
	for (int i = 0; i < adapter->num_queues; i++, que++) {
		rid = que->msix + 1;
		if (que->tag != NULL) {
			bus_teardown_intr(dev, que->res, que->tag);
			que->tag = NULL;
		}
		if (que->res != NULL)
			bus_release_resource(dev, SYS_RES_IRQ, rid, que->res);
	}


	/* Clean the Legacy or Link interrupt last */
	if (adapter->vector) /* we are doing MSIX */
		rid = adapter->vector + 1;
	else
		(adapter->msix != 0) ? (rid = 1):(rid = 0);

	if (adapter->tag != NULL) {
		bus_teardown_intr(dev, adapter->res, adapter->tag);
		adapter->tag = NULL;
	}
	if (adapter->res != NULL)
		bus_release_resource(dev, SYS_RES_IRQ, rid, adapter->res);

mem:
	if (adapter->msix)
		pci_release_msi(dev);

	if (adapter->msix_mem != NULL)
		bus_release_resource(dev, SYS_RES_MEMORY,
		    memrid, adapter->msix_mem);

	if (adapter->pci_mem != NULL)
		bus_release_resource(dev, SYS_RES_MEMORY,
		    PCIR_BAR(0), adapter->pci_mem);

	return;
}

/*********************************************************************
 *
 *  Setup networking device structure and register an interface.
 *
 **********************************************************************/
static int
ixgbe_setup_interface(device_t dev, struct adapter *adapter)
{
	struct ifnet   *ifp;

	INIT_DEBUGOUT("ixgbe_setup_interface: begin");

	ifp = adapter->ifp = if_alloc(IFT_ETHER);
	if (ifp == NULL) {
		device_printf(dev, "can not allocate ifnet structure\n");
		return (-1);
	}
	if_initname(ifp, device_get_name(dev), device_get_unit(dev));
	ifp->if_baudrate = IF_Gbps(10);
	ifp->if_init = ixgbe_init;
	ifp->if_softc = adapter;
	ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST;
	ifp->if_ioctl = ixgbe_ioctl;
#if __FreeBSD_version >= 1100036
	if_setgetcounterfn(ifp, ixgbe_get_counter);
#endif
#if __FreeBSD_version >= 1100045
	/* TSO parameters */
	ifp->if_hw_tsomax = 65518;
	ifp->if_hw_tsomaxsegcount = IXGBE_82599_SCATTER;
	ifp->if_hw_tsomaxsegsize = 2048;
#endif
#ifndef IXGBE_LEGACY_TX
	ifp->if_transmit = ixgbe_mq_start;
	ifp->if_qflush = ixgbe_qflush;
#else
	ifp->if_start = ixgbe_start;
	IFQ_SET_MAXLEN(&ifp->if_snd, adapter->num_tx_desc - 2);
	ifp->if_snd.ifq_drv_maxlen = adapter->num_tx_desc - 2;
	IFQ_SET_READY(&ifp->if_snd);
#endif

	ether_ifattach(ifp, adapter->hw.mac.addr);

	adapter->max_frame_size =
	    ifp->if_mtu + ETHER_HDR_LEN + ETHER_CRC_LEN;

	/*
	 * Tell the upper layer(s) we support long frames.
	 */
	ifp->if_hdrlen = sizeof(struct ether_vlan_header);

	ifp->if_capabilities |= IFCAP_HWCSUM | IFCAP_TSO | IFCAP_VLAN_HWCSUM;
	ifp->if_capabilities |= IFCAP_JUMBO_MTU;
	ifp->if_capabilities |= IFCAP_LRO;
	ifp->if_capabilities |= IFCAP_VLAN_HWTAGGING
			     |  IFCAP_VLAN_HWTSO
			     |  IFCAP_VLAN_MTU
			     |  IFCAP_HWSTATS;
	ifp->if_capenable = ifp->if_capabilities;

	/*
	** Don't turn this on by default, if vlans are
	** created on another pseudo device (eg. lagg)
	** then vlan events are not passed thru, breaking
	** operation, but with HW FILTER off it works. If
	** using vlans directly on the ixgbe driver you can
	** enable this and get full hardware tag filtering.
	*/
	ifp->if_capabilities |= IFCAP_VLAN_HWFILTER;

	/*
	 * Specify the media types supported by this adapter and register
	 * callbacks to update media and link information
	 */
	ifmedia_init(&adapter->media, IFM_IMASK, ixgbe_media_change,
		    ixgbe_media_status);

	ixgbe_add_media_types(adapter);

	/* Autoselect media by default */
	ifmedia_set(&adapter->media, IFM_ETHER | IFM_AUTO);

	return (0);
}

static void
ixgbe_add_media_types(struct adapter *adapter)
{
	struct ixgbe_hw *hw = &adapter->hw;
	device_t dev = adapter->dev;
	int layer;

	layer = ixgbe_get_supported_physical_layer(hw);

	/* Media types with matching FreeBSD media defines */
	if (layer & IXGBE_PHYSICAL_LAYER_10GBASE_T)
		ifmedia_add(&adapter->media, IFM_ETHER | IFM_10G_T, 0, NULL);
	if (layer & IXGBE_PHYSICAL_LAYER_1000BASE_T)
		ifmedia_add(&adapter->media, IFM_ETHER | IFM_1000_T, 0, NULL);
	if (layer & IXGBE_PHYSICAL_LAYER_100BASE_TX)
		ifmedia_add(&adapter->media, IFM_ETHER | IFM_100_TX, 0, NULL);

	if (layer & IXGBE_PHYSICAL_LAYER_SFP_PLUS_CU ||
	    layer & IXGBE_PHYSICAL_LAYER_SFP_ACTIVE_DA)
		ifmedia_add(&adapter->media, IFM_ETHER | IFM_10G_TWINAX, 0, NULL);

	if (layer & IXGBE_PHYSICAL_LAYER_10GBASE_LR)
		ifmedia_add(&adapter->media, IFM_ETHER | IFM_10G_LR, 0, NULL);
	if (layer & IXGBE_PHYSICAL_LAYER_10GBASE_SR)
		ifmedia_add(&adapter->media, IFM_ETHER | IFM_10G_SR, 0, NULL);
	if (layer & IXGBE_PHYSICAL_LAYER_10GBASE_CX4)
		ifmedia_add(&adapter->media, IFM_ETHER | IFM_10G_CX4, 0, NULL);
	if (layer & IXGBE_PHYSICAL_LAYER_1000BASE_SX)
		ifmedia_add(&adapter->media, IFM_ETHER | IFM_1000_SX, 0, NULL);

	/*
	** Other (no matching FreeBSD media type):
	** To workaround this, we'll assign these completely
	** inappropriate media types.
	*/
	if (layer & IXGBE_PHYSICAL_LAYER_10GBASE_KR) {
		device_printf(dev, "Media supported: 10GbaseKR\n");
		device_printf(dev, "10GbaseKR mapped to 10GbaseSR\n");
		ifmedia_add(&adapter->media, IFM_ETHER | IFM_10G_SR, 0, NULL);
	}
	if (layer & IXGBE_PHYSICAL_LAYER_10GBASE_KX4) {
		device_printf(dev, "Media supported: 10GbaseKX4\n");
		device_printf(dev, "10GbaseKX4 mapped to 10GbaseCX4\n");
		ifmedia_add(&adapter->media, IFM_ETHER | IFM_10G_CX4, 0, NULL);
	}
	if (layer & IXGBE_PHYSICAL_LAYER_1000BASE_KX) {
		device_printf(dev, "Media supported: 1000baseKX\n");
		device_printf(dev, "1000baseKX mapped to 1000baseCX\n");
		ifmedia_add(&adapter->media, IFM_ETHER | IFM_1000_CX, 0, NULL);
	}
	if (layer & IXGBE_PHYSICAL_LAYER_1000BASE_BX) {
		/* Someday, someone will care about you... */
		device_printf(dev, "Media supported: 1000baseBX\n");
	}

	if (hw->device_id == IXGBE_DEV_ID_82598AT) {
		ifmedia_add(&adapter->media,
		    IFM_ETHER | IFM_1000_T | IFM_FDX, 0, NULL);
		ifmedia_add(&adapter->media,
		    IFM_ETHER | IFM_1000_T, 0, NULL);
	}

	ifmedia_add(&adapter->media, IFM_ETHER | IFM_AUTO, 0, NULL);
}

static void
ixgbe_config_link(struct adapter *adapter)
{
	struct ixgbe_hw *hw = &adapter->hw;
	u32	autoneg, err = 0;
	bool	sfp, negotiate;

	sfp = ixgbe_is_sfp(hw);

	if (sfp) {
		if (hw->phy.multispeed_fiber) {
			hw->mac.ops.setup_sfp(hw);
			ixgbe_enable_tx_laser(hw);
			taskqueue_enqueue(adapter->tq, &adapter->msf_task);
		} else
			taskqueue_enqueue(adapter->tq, &adapter->mod_task);
	} else {
		if (hw->mac.ops.check_link)
			err = ixgbe_check_link(hw, &adapter->link_speed,
			    &adapter->link_up, FALSE);
		if (err)
			goto out;
		autoneg = hw->phy.autoneg_advertised;
		if ((!autoneg) && (hw->mac.ops.get_link_capabilities))
                	err  = hw->mac.ops.get_link_capabilities(hw,
			    &autoneg, &negotiate);
		if (err)
			goto out;
		if (hw->mac.ops.setup_link)
                	err = hw->mac.ops.setup_link(hw,
			    autoneg, adapter->link_up);
	}
out:
	return;
}


/*********************************************************************
 *
 *  Enable transmit units.
 *
 **********************************************************************/
static void
ixgbe_initialize_transmit_units(struct adapter *adapter)
{
	struct tx_ring	*txr = adapter->tx_rings;
	struct ixgbe_hw	*hw = &adapter->hw;

	/* Setup the Base and Length of the Tx Descriptor Ring */

	for (int i = 0; i < adapter->num_queues; i++, txr++) {
		u64	tdba = txr->txdma.dma_paddr;
		u32	txctrl = 0;

		IXGBE_WRITE_REG(hw, IXGBE_TDBAL(i),
		       (tdba & 0x00000000ffffffffULL));
		IXGBE_WRITE_REG(hw, IXGBE_TDBAH(i), (tdba >> 32));
		IXGBE_WRITE_REG(hw, IXGBE_TDLEN(i),
		    adapter->num_tx_desc * sizeof(union ixgbe_adv_tx_desc));

		/* Setup the HW Tx Head and Tail descriptor pointers */
		IXGBE_WRITE_REG(hw, IXGBE_TDH(i), 0);
		IXGBE_WRITE_REG(hw, IXGBE_TDT(i), 0);

		/* Cache the tail address */
		txr->tail = IXGBE_TDT(txr->me);

		/* Set the processing limit */
		txr->process_limit = ixgbe_tx_process_limit;

		/* Disable Head Writeback */
		switch (hw->mac.type) {
		case ixgbe_mac_82598EB:
			txctrl = IXGBE_READ_REG(hw, IXGBE_DCA_TXCTRL(i));
			break;
		case ixgbe_mac_82599EB:
		case ixgbe_mac_X540:
		default:
			txctrl = IXGBE_READ_REG(hw, IXGBE_DCA_TXCTRL_82599(i));
			break;
                }
		txctrl &= ~IXGBE_DCA_TXCTRL_DESC_WRO_EN;
		switch (hw->mac.type) {
		case ixgbe_mac_82598EB:
			IXGBE_WRITE_REG(hw, IXGBE_DCA_TXCTRL(i), txctrl);
			break;
		case ixgbe_mac_82599EB:
		case ixgbe_mac_X540:
		default:
			IXGBE_WRITE_REG(hw, IXGBE_DCA_TXCTRL_82599(i), txctrl);
			break;
		}

	}

	if (hw->mac.type != ixgbe_mac_82598EB) {
		u32 dmatxctl, rttdcs;
		dmatxctl = IXGBE_READ_REG(hw, IXGBE_DMATXCTL);
		dmatxctl |= IXGBE_DMATXCTL_TE;
		IXGBE_WRITE_REG(hw, IXGBE_DMATXCTL, dmatxctl);
		/* Disable arbiter to set MTQC */
		rttdcs = IXGBE_READ_REG(hw, IXGBE_RTTDCS);
		rttdcs |= IXGBE_RTTDCS_ARBDIS;
		IXGBE_WRITE_REG(hw, IXGBE_RTTDCS, rttdcs);
		IXGBE_WRITE_REG(hw, IXGBE_MTQC, IXGBE_MTQC_64Q_1PB);
		rttdcs &= ~IXGBE_RTTDCS_ARBDIS;
		IXGBE_WRITE_REG(hw, IXGBE_RTTDCS, rttdcs);
	}

	return;
}

static void
ixgbe_initialise_rss_mapping(struct adapter *adapter)
{
	struct ixgbe_hw	*hw = &adapter->hw;
	uint32_t reta;
	int i, j, queue_id, table_size;
	int index_mult;
	uint32_t rss_key[10];
	uint32_t mrqc;
#ifdef	RSS
	uint32_t rss_hash_config;
#endif

	/* Setup RSS */
	reta = 0;

#ifdef	RSS
	/* Fetch the configured RSS key */
	rss_getkey((uint8_t *) &rss_key);
#else
	/* set up random bits */
	arc4rand(&rss_key, sizeof(rss_key), 0);
#endif

	/* Set multiplier for RETA setup and table size based on MAC */
	index_mult = 0x1;
	table_size = 128;
	switch (adapter->hw.mac.type) {
	case ixgbe_mac_82598EB:
		index_mult = 0x11;
		break;
	case ixgbe_mac_X550:
	case ixgbe_mac_X550EM_x:
		table_size = 512;
		break;
	default:
		break;
	}

	/* Set up the redirection table */
	for (i = 0, j = 0; i < table_size; i++, j++) {
		if (j == adapter->num_queues) j = 0;
#ifdef	RSS
		/*
		 * Fetch the RSS bucket id for the given indirection entry.
		 * Cap it at the number of configured buckets (which is
		 * num_queues.)
		 */
		queue_id = rss_get_indirection_to_bucket(i);
		queue_id = queue_id % adapter->num_queues;
#else
		queue_id = (j * index_mult);
#endif
		/*
		 * The low 8 bits are for hash value (n+0);
		 * The next 8 bits are for hash value (n+1), etc.
		 */
		reta = reta >> 8;
		reta = reta | ( ((uint32_t) queue_id) << 24);
		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;
		}
	}

	/* Now fill our hash function seeds */
	for (int i = 0; i < 10; i++)
		IXGBE_WRITE_REG(hw, IXGBE_RSSRK(i), rss_key[i]);

	/* Perform hash on these packet types */
#ifdef	RSS
	mrqc = IXGBE_MRQC_RSSEN;
	rss_hash_config = rss_gethashconfig();
	if (rss_hash_config & RSS_HASHTYPE_RSS_IPV4)
		mrqc |= IXGBE_MRQC_RSS_FIELD_IPV4;
	if (rss_hash_config & RSS_HASHTYPE_RSS_TCP_IPV4)
		mrqc |= IXGBE_MRQC_RSS_FIELD_IPV4_TCP;
	if (rss_hash_config & RSS_HASHTYPE_RSS_IPV6)
		mrqc |= IXGBE_MRQC_RSS_FIELD_IPV6;
	if (rss_hash_config & RSS_HASHTYPE_RSS_TCP_IPV6)
		mrqc |= IXGBE_MRQC_RSS_FIELD_IPV6_TCP;
	if (rss_hash_config & RSS_HASHTYPE_RSS_IPV6_EX)
		mrqc |= IXGBE_MRQC_RSS_FIELD_IPV6_EX;
	if (rss_hash_config & RSS_HASHTYPE_RSS_TCP_IPV6_EX)
		mrqc |= IXGBE_MRQC_RSS_FIELD_IPV6_EX_TCP;
	if (rss_hash_config & RSS_HASHTYPE_RSS_UDP_IPV4)
		mrqc |= IXGBE_MRQC_RSS_FIELD_IPV4_UDP;
	if (rss_hash_config & RSS_HASHTYPE_RSS_UDP_IPV4_EX)
		device_printf(adapter->dev,
		    "%s: RSS_HASHTYPE_RSS_UDP_IPV4_EX defined, "
		    "but not supported\n", __func__);
	if (rss_hash_config & RSS_HASHTYPE_RSS_UDP_IPV6)
		mrqc |= IXGBE_MRQC_RSS_FIELD_IPV6_UDP;
	if (rss_hash_config & RSS_HASHTYPE_RSS_UDP_IPV6_EX)
		mrqc |= IXGBE_MRQC_RSS_FIELD_IPV6_EX_UDP;
#else
	/*
	 * Disable UDP - IP fragments aren't currently being handled
	 * and so we end up with a mix of 2-tuple and 4-tuple
	 * traffic.
	 */
	mrqc = IXGBE_MRQC_RSSEN
	     | IXGBE_MRQC_RSS_FIELD_IPV4
	     | IXGBE_MRQC_RSS_FIELD_IPV4_TCP
#if 0
	     | IXGBE_MRQC_RSS_FIELD_IPV4_UDP
#endif
	     | IXGBE_MRQC_RSS_FIELD_IPV6_EX_TCP
	     | IXGBE_MRQC_RSS_FIELD_IPV6_EX
	     | IXGBE_MRQC_RSS_FIELD_IPV6
	     | IXGBE_MRQC_RSS_FIELD_IPV6_TCP
#if 0
	     | IXGBE_MRQC_RSS_FIELD_IPV6_UDP
	     | IXGBE_MRQC_RSS_FIELD_IPV6_EX_UDP
#endif
	;
#endif /* RSS */
	IXGBE_WRITE_REG(hw, IXGBE_MRQC, mrqc);
}


/*********************************************************************
 *
 *  Setup receive registers and features.
 *
 **********************************************************************/
#define IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT 2

#define BSIZEPKT_ROUNDUP ((1<<IXGBE_SRRCTL_BSIZEPKT_SHIFT)-1)

static void
ixgbe_initialize_receive_units(struct adapter *adapter)
{
	struct	rx_ring	*rxr = adapter->rx_rings;
	struct ixgbe_hw	*hw = &adapter->hw;
	struct ifnet   *ifp = adapter->ifp;
	u32		bufsz, fctrl, srrctl, rxcsum;
	u32		hlreg;


	/*
	 * Make sure receives are disabled while
	 * setting up the descriptor ring
	 */
	ixgbe_disable_rx(hw);

	/* Enable broadcasts */
	fctrl = IXGBE_READ_REG(hw, IXGBE_FCTRL);
	fctrl |= IXGBE_FCTRL_BAM;
	if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
		fctrl |= IXGBE_FCTRL_DPF;
		fctrl |= IXGBE_FCTRL_PMCF;
	}
	IXGBE_WRITE_REG(hw, IXGBE_FCTRL, fctrl);

	/* Set for Jumbo Frames? */
	hlreg = IXGBE_READ_REG(hw, IXGBE_HLREG0);
	if (ifp->if_mtu > ETHERMTU)
		hlreg |= IXGBE_HLREG0_JUMBOEN;
	else
		hlreg &= ~IXGBE_HLREG0_JUMBOEN;
#ifdef DEV_NETMAP
	/* crcstrip is conditional in netmap (in RDRXCTL too ?) */
	if (ifp->if_capenable & IFCAP_NETMAP && !ix_crcstrip)
		hlreg &= ~IXGBE_HLREG0_RXCRCSTRP;
	else
		hlreg |= IXGBE_HLREG0_RXCRCSTRP;
#endif /* DEV_NETMAP */
	IXGBE_WRITE_REG(hw, IXGBE_HLREG0, hlreg);

	bufsz = (adapter->rx_mbuf_sz +
	    BSIZEPKT_ROUNDUP) >> IXGBE_SRRCTL_BSIZEPKT_SHIFT;

	for (int i = 0; i < adapter->num_queues; i++, rxr++) {
		u64 rdba = rxr->rxdma.dma_paddr;

		/* Setup the Base and Length of the Rx Descriptor Ring */
		IXGBE_WRITE_REG(hw, IXGBE_RDBAL(i),
			       (rdba & 0x00000000ffffffffULL));
		IXGBE_WRITE_REG(hw, IXGBE_RDBAH(i), (rdba >> 32));
		IXGBE_WRITE_REG(hw, IXGBE_RDLEN(i),
		    adapter->num_rx_desc * sizeof(union ixgbe_adv_rx_desc));

		/* Set up the SRRCTL register */
		srrctl = IXGBE_READ_REG(hw, IXGBE_SRRCTL(i));
		srrctl &= ~IXGBE_SRRCTL_BSIZEHDR_MASK;
		srrctl &= ~IXGBE_SRRCTL_BSIZEPKT_MASK;
		srrctl |= bufsz;
		srrctl |= IXGBE_SRRCTL_DESCTYPE_ADV_ONEBUF;

		/*
		 * Set DROP_EN iff we have no flow control and >1 queue.
		 * Note that srrctl was cleared shortly before during reset,
		 * so we do not need to clear the bit, but do it just in case
		 * this code is moved elsewhere.
		 */
		if (adapter->num_queues > 1 &&
		    adapter->hw.fc.requested_mode == ixgbe_fc_none) {
			srrctl |= IXGBE_SRRCTL_DROP_EN;
		} else {
			srrctl &= ~IXGBE_SRRCTL_DROP_EN;
		}

		IXGBE_WRITE_REG(hw, IXGBE_SRRCTL(i), srrctl);

		/* Setup the HW Rx Head and Tail Descriptor Pointers */
		IXGBE_WRITE_REG(hw, IXGBE_RDH(i), 0);
		IXGBE_WRITE_REG(hw, IXGBE_RDT(i), 0);

		/* Set the processing limit */
		rxr->process_limit = ixgbe_rx_process_limit;

		/* Set the driver rx tail address */
		rxr->tail =  IXGBE_RDT(rxr->me);
	}

	if (adapter->hw.mac.type != ixgbe_mac_82598EB) {
		u32 psrtype = IXGBE_PSRTYPE_TCPHDR |
			      IXGBE_PSRTYPE_UDPHDR |
			      IXGBE_PSRTYPE_IPV4HDR |
			      IXGBE_PSRTYPE_IPV6HDR;
		IXGBE_WRITE_REG(hw, IXGBE_PSRTYPE(0), psrtype);
	}

	rxcsum = IXGBE_READ_REG(hw, IXGBE_RXCSUM);

	ixgbe_initialise_rss_mapping(adapter);

	if (adapter->num_queues > 1) {
		/* RSS and RX IPP Checksum are mutually exclusive */
		rxcsum |= IXGBE_RXCSUM_PCSD;
	}

	if (ifp->if_capenable & IFCAP_RXCSUM)
		rxcsum |= IXGBE_RXCSUM_PCSD;

	if (!(rxcsum & IXGBE_RXCSUM_PCSD))
		rxcsum |= IXGBE_RXCSUM_IPPCSE;

	IXGBE_WRITE_REG(hw, IXGBE_RXCSUM, rxcsum);

	return;
}


/*
** This routine is run via an vlan config EVENT,
** it enables us to use the HW Filter table since
** we can get the vlan id. This just creates the
** entry in the soft version of the VFTA, init will
** repopulate the real table.
*/
static void
ixgbe_register_vlan(void *arg, struct ifnet *ifp, u16 vtag)
{
	struct adapter	*adapter = ifp->if_softc;
	u16		index, bit;

	if (ifp->if_softc !=  arg)   /* Not our event */
		return;

	if ((vtag == 0) || (vtag > 4095))	/* Invalid */
		return;

	IXGBE_CORE_LOCK(adapter);
	index = (vtag >> 5) & 0x7F;
	bit = vtag & 0x1F;
	adapter->shadow_vfta[index] |= (1 << bit);
	++adapter->num_vlans;
	ixgbe_setup_vlan_hw_support(adapter);
	IXGBE_CORE_UNLOCK(adapter);
}

/*
** This routine is run via an vlan
** unconfig EVENT, remove our entry
** in the soft vfta.
*/
static void
ixgbe_unregister_vlan(void *arg, struct ifnet *ifp, u16 vtag)
{
	struct adapter	*adapter = ifp->if_softc;
	u16		index, bit;

	if (ifp->if_softc !=  arg)
		return;

	if ((vtag == 0) || (vtag > 4095))	/* Invalid */
		return;

	IXGBE_CORE_LOCK(adapter);
	index = (vtag >> 5) & 0x7F;
	bit = vtag & 0x1F;
	adapter->shadow_vfta[index] &= ~(1 << bit);
	--adapter->num_vlans;
	/* Re-init to load the changes */
	ixgbe_setup_vlan_hw_support(adapter);
	IXGBE_CORE_UNLOCK(adapter);
}

static void
ixgbe_setup_vlan_hw_support(struct adapter *adapter)
{
	struct ifnet 	*ifp = adapter->ifp;
	struct ixgbe_hw *hw = &adapter->hw;
	struct rx_ring	*rxr;
	u32		ctrl;


	/*
	** We get here thru init_locked, meaning
	** a soft reset, this has already cleared
	** the VFTA and other state, so if there
	** have been no vlan's registered do nothing.
	*/
	if (adapter->num_vlans == 0)
		return;

	/* Setup the queues for vlans */
	for (int i = 0; i < adapter->num_queues; i++) {
		rxr = &adapter->rx_rings[i];
		/* On 82599 the VLAN enable is per/queue in RXDCTL */
		if (hw->mac.type != ixgbe_mac_82598EB) {
			ctrl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(i));
			ctrl |= IXGBE_RXDCTL_VME;
			IXGBE_WRITE_REG(hw, IXGBE_RXDCTL(i), ctrl);
		}
		rxr->vtag_strip = TRUE;
	}

	if ((ifp->if_capenable & IFCAP_VLAN_HWFILTER) == 0)
		return;
	/*
	** A soft reset zero's out the VFTA, so
	** we need to repopulate it now.
	*/
	for (int i = 0; i < IXGBE_VFTA_SIZE; i++)
		if (adapter->shadow_vfta[i] != 0)
			IXGBE_WRITE_REG(hw, IXGBE_VFTA(i),
			    adapter->shadow_vfta[i]);

	ctrl = IXGBE_READ_REG(hw, IXGBE_VLNCTRL);
	/* Enable the Filter Table if enabled */
	if (ifp->if_capenable & IFCAP_VLAN_HWFILTER) {
		ctrl &= ~IXGBE_VLNCTRL_CFIEN;
		ctrl |= IXGBE_VLNCTRL_VFE;
	}
	if (hw->mac.type == ixgbe_mac_82598EB)
		ctrl |= IXGBE_VLNCTRL_VME;
	IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, ctrl);
}

static void
ixgbe_enable_intr(struct adapter *adapter)
{
	struct ixgbe_hw	*hw = &adapter->hw;
	struct ix_queue	*que = adapter->queues;
	u32		mask, fwsm;

	mask = (IXGBE_EIMS_ENABLE_MASK & ~IXGBE_EIMS_RTX_QUEUE);
	/* Enable Fan Failure detection */
	if (hw->device_id == IXGBE_DEV_ID_82598AT)
		    mask |= IXGBE_EIMS_GPI_SDP1;

	switch (adapter->hw.mac.type) {
		case ixgbe_mac_82599EB:
			mask |= IXGBE_EIMS_ECC;
			/* Temperature sensor on some adapters */
			mask |= IXGBE_EIMS_GPI_SDP0;
			/* SFP+ (RX_LOS_N & MOD_ABS_N) */
			mask |= IXGBE_EIMS_GPI_SDP1;
			mask |= IXGBE_EIMS_GPI_SDP2;
#ifdef IXGBE_FDIR
			mask |= IXGBE_EIMS_FLOW_DIR;
#endif
			break;
		case ixgbe_mac_X540:
			/* Detect if Thermal Sensor is enabled */
			fwsm = IXGBE_READ_REG(hw, IXGBE_FWSM);
			if (fwsm & IXGBE_FWSM_TS_ENABLED)
				mask |= IXGBE_EIMS_TS;
			mask |= IXGBE_EIMS_ECC;
#ifdef IXGBE_FDIR
			mask |= IXGBE_EIMS_FLOW_DIR;
#endif
			break;
		case ixgbe_mac_X550:
		case ixgbe_mac_X550EM_x:
			/* MAC thermal sensor is automatically enabled */
			mask |= IXGBE_EIMS_TS;
			/* Some devices use SDP0 for important information */
			if (hw->device_id == IXGBE_DEV_ID_X550EM_X_SFP ||
			    hw->device_id == IXGBE_DEV_ID_X550EM_X_10G_T)
				mask |= IXGBE_EIMS_GPI_SDP0_BY_MAC(hw);
			mask |= IXGBE_EIMS_ECC;
#ifdef IXGBE_FDIR
			mask |= IXGBE_EIMS_FLOW_DIR;
#endif
		/* falls through */
		default:
			break;
	}

	IXGBE_WRITE_REG(hw, IXGBE_EIMS, mask);

	/* With MSI-X we use auto clear */
	if (adapter->msix_mem) {
		mask = IXGBE_EIMS_ENABLE_MASK;
		/* Don't autoclear Link */
		mask &= ~IXGBE_EIMS_OTHER;
		mask &= ~IXGBE_EIMS_LSC;
		IXGBE_WRITE_REG(hw, IXGBE_EIAC, mask);
	}

	/*
	** Now enable all queues, this is done separately to
	** allow for handling the extended (beyond 32) MSIX
	** vectors that can be used by 82599
	*/
        for (int i = 0; i < adapter->num_queues; i++, que++)
                ixgbe_enable_queue(adapter, que->msix);

	IXGBE_WRITE_FLUSH(hw);

	return;
}

static void
ixgbe_disable_intr(struct adapter *adapter)
{
	if (adapter->msix_mem)
		IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIAC, 0);
	if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
		IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC, ~0);
	} else {
		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);
	}
	IXGBE_WRITE_FLUSH(&adapter->hw);
	return;
}

/*
** Get the width and transaction speed of
** the slot this adapter is plugged into.
*/
static void
ixgbe_get_slot_info(struct ixgbe_hw *hw)
{
	device_t		dev = ((struct ixgbe_osdep *)hw->back)->dev;
	struct ixgbe_mac_info	*mac = &hw->mac;
	u16			link;
	u32			offset;

	/* For most devices simply call the shared code routine */
	if (hw->device_id != IXGBE_DEV_ID_82599_SFP_SF_QP) {
		ixgbe_get_bus_info(hw);
		/* These devices don't use PCI-E */
		switch (hw->mac.type) {
		case ixgbe_mac_X550EM_x:
			return;
		default:
			goto display;
		}
	}

	/*
	** For the Quad port adapter we need to parse back
	** up the PCI tree to find the speed of the expansion
	** slot into which this adapter is plugged. A bit more work.
	*/
	dev = device_get_parent(device_get_parent(dev));
#ifdef IXGBE_DEBUG
	device_printf(dev, "parent pcib = %x,%x,%x\n",
	    pci_get_bus(dev), pci_get_slot(dev), pci_get_function(dev));
#endif
	dev = device_get_parent(device_get_parent(dev));
#ifdef IXGBE_DEBUG
	device_printf(dev, "slot pcib = %x,%x,%x\n",
	    pci_get_bus(dev), pci_get_slot(dev), pci_get_function(dev));
#endif
	/* Now get the PCI Express Capabilities offset */
	pci_find_cap(dev, PCIY_EXPRESS, &offset);
	/* ...and read the Link Status Register */
	link = pci_read_config(dev, offset + PCIER_LINK_STA, 2);
	switch (link & IXGBE_PCI_LINK_WIDTH) {
	case IXGBE_PCI_LINK_WIDTH_1:
		hw->bus.width = ixgbe_bus_width_pcie_x1;
		break;
	case IXGBE_PCI_LINK_WIDTH_2:
		hw->bus.width = ixgbe_bus_width_pcie_x2;
		break;
	case IXGBE_PCI_LINK_WIDTH_4:
		hw->bus.width = ixgbe_bus_width_pcie_x4;
		break;
	case IXGBE_PCI_LINK_WIDTH_8:
		hw->bus.width = ixgbe_bus_width_pcie_x8;
		break;
	default:
		hw->bus.width = ixgbe_bus_width_unknown;
		break;
	}

	switch (link & IXGBE_PCI_LINK_SPEED) {
	case IXGBE_PCI_LINK_SPEED_2500:
		hw->bus.speed = ixgbe_bus_speed_2500;
		break;
	case IXGBE_PCI_LINK_SPEED_5000:
		hw->bus.speed = ixgbe_bus_speed_5000;
		break;
	case IXGBE_PCI_LINK_SPEED_8000:
		hw->bus.speed = ixgbe_bus_speed_8000;
		break;
	default:
		hw->bus.speed = ixgbe_bus_speed_unknown;
		break;
	}

	mac->ops.set_lan_id(hw);

display:
	device_printf(dev,"PCI Express Bus: Speed %s %s\n",
	    ((hw->bus.speed == ixgbe_bus_speed_8000) ? "8.0GT/s":
	    (hw->bus.speed == ixgbe_bus_speed_5000) ? "5.0GT/s":
	    (hw->bus.speed == ixgbe_bus_speed_2500) ? "2.5GT/s":"Unknown"),
	    (hw->bus.width == ixgbe_bus_width_pcie_x8) ? "Width x8" :
	    (hw->bus.width == ixgbe_bus_width_pcie_x4) ? "Width x4" :
	    (hw->bus.width == ixgbe_bus_width_pcie_x1) ? "Width x1" :
	    ("Unknown"));

	if ((hw->device_id != IXGBE_DEV_ID_82599_SFP_SF_QP) &&
	    ((hw->bus.width <= ixgbe_bus_width_pcie_x4) &&
	    (hw->bus.speed == ixgbe_bus_speed_2500))) {
		device_printf(dev, "PCI-Express bandwidth available"
		    " for this card\n     is not sufficient for"
		    " optimal performance.\n");
		device_printf(dev, "For optimal performance a x8 "
		    "PCIE, or x4 PCIE Gen2 slot is required.\n");
        }
	if ((hw->device_id == IXGBE_DEV_ID_82599_SFP_SF_QP) &&
	    ((hw->bus.width <= ixgbe_bus_width_pcie_x8) &&
	    (hw->bus.speed < ixgbe_bus_speed_8000))) {
		device_printf(dev, "PCI-Express bandwidth available"
		    " for this card\n     is not sufficient for"
		    " optimal performance.\n");
		device_printf(dev, "For optimal performance a x8 "
		    "PCIE Gen3 slot is required.\n");
        }

	return;
}


/*
** Setup the correct IVAR register for a particular MSIX interrupt
**   (yes this is all very magic and confusing :)
**  - entry is the register array entry
**  - vector is the MSIX vector for this queue
**  - type is RX/TX/MISC
*/
static void
ixgbe_set_ivar(struct adapter *adapter, u8 entry, u8 vector, s8 type)
{
	struct ixgbe_hw *hw = &adapter->hw;
	u32 ivar, index;

	vector |= IXGBE_IVAR_ALLOC_VAL;

	switch (hw->mac.type) {

	case ixgbe_mac_82598EB:
		if (type == -1)
			entry = IXGBE_IVAR_OTHER_CAUSES_INDEX;
		else
			entry += (type * 64);
		index = (entry >> 2) & 0x1F;
		ivar = IXGBE_READ_REG(hw, IXGBE_IVAR(index));
		ivar &= ~(0xFF << (8 * (entry & 0x3)));
		ivar |= (vector << (8 * (entry & 0x3)));
		IXGBE_WRITE_REG(&adapter->hw, IXGBE_IVAR(index), ivar);
		break;

	case ixgbe_mac_82599EB:
	case ixgbe_mac_X540:
	case ixgbe_mac_X550:
	case ixgbe_mac_X550EM_x:
		if (type == -1) { /* MISC IVAR */
			index = (entry & 1) * 8;
			ivar = IXGBE_READ_REG(hw, IXGBE_IVAR_MISC);
			ivar &= ~(0xFF << index);
			ivar |= (vector << index);
			IXGBE_WRITE_REG(hw, IXGBE_IVAR_MISC, ivar);
		} else {	/* RX/TX IVARS */
			index = (16 * (entry & 1)) + (8 * type);
			ivar = IXGBE_READ_REG(hw, IXGBE_IVAR(entry >> 1));
			ivar &= ~(0xFF << index);
			ivar |= (vector << index);
			IXGBE_WRITE_REG(hw, IXGBE_IVAR(entry >> 1), ivar);
		}

	default:
		break;
	}
}

static void
ixgbe_configure_ivars(struct adapter *adapter)
{
	struct  ix_queue *que = adapter->queues;
	u32 newitr;

	if (ixgbe_max_interrupt_rate > 0)
		newitr = (4000000 / ixgbe_max_interrupt_rate) & 0x0FF8;
	else {
		/*
		** Disable DMA coalescing if interrupt moderation is
		** disabled.
		*/
		adapter->dmac = 0;
		newitr = 0;
	}

        for (int i = 0; i < adapter->num_queues; i++, que++) {
		/* First the RX queue entry */
                ixgbe_set_ivar(adapter, i, que->msix, 0);
		/* ... and the TX */
		ixgbe_set_ivar(adapter, i, que->msix, 1);
		/* Set an Initial EITR value */
                IXGBE_WRITE_REG(&adapter->hw,
                    IXGBE_EITR(que->msix), newitr);
	}

	/* For the Link interrupt */
        ixgbe_set_ivar(adapter, 1, adapter->vector, -1);
}

/*
** ixgbe_sfp_probe - called in the local timer to
** determine if a port had optics inserted.
*/
static bool ixgbe_sfp_probe(struct adapter *adapter)
{
	struct ixgbe_hw	*hw = &adapter->hw;
	device_t	dev = adapter->dev;
	bool		result = FALSE;

	if ((hw->phy.type == ixgbe_phy_nl) &&
	    (hw->phy.sfp_type == ixgbe_sfp_type_not_present)) {
		s32 ret = hw->phy.ops.identify_sfp(hw);
		if (ret)
                        goto out;
		ret = hw->phy.ops.reset(hw);
		if (ret == IXGBE_ERR_SFP_NOT_SUPPORTED) {
			device_printf(dev,"Unsupported SFP+ module detected!");
			printf(" Reload driver with supported module.\n");
			adapter->sfp_probe = FALSE;
                        goto out;
		} else
			device_printf(dev,"SFP+ module detected!\n");
		/* We now have supported optics */
		adapter->sfp_probe = FALSE;
		/* Set the optics type so system reports correctly */
		ixgbe_setup_optics(adapter);
		result = TRUE;
	}
out:
	return (result);
}

/*
** Tasklet handler for MSIX Link interrupts
**  - do outside interrupt since it might sleep
*/
static void
ixgbe_handle_link(void *context, int pending)
{
	struct adapter  *adapter = context;

	ixgbe_check_link(&adapter->hw,
	    &adapter->link_speed, &adapter->link_up, 0);
	ixgbe_update_link_status(adapter);
}

/*
** Tasklet for handling SFP module interrupts
*/
static void
ixgbe_handle_mod(void *context, int pending)
{
	struct adapter  *adapter = context;
	struct ixgbe_hw *hw = &adapter->hw;
	device_t	dev = adapter->dev;
	u32 err;

	err = hw->phy.ops.identify_sfp(hw);
	if (err == IXGBE_ERR_SFP_NOT_SUPPORTED) {
		device_printf(dev,
		    "Unsupported SFP+ module type was detected.\n");
		return;
	}
	err = hw->mac.ops.setup_sfp(hw);
	if (err == IXGBE_ERR_SFP_NOT_SUPPORTED) {
		device_printf(dev,
		    "Setup failure - unsupported SFP+ module type.\n");
		return;
	}
	taskqueue_enqueue(adapter->tq, &adapter->msf_task);
	return;
}


/*
** Tasklet for handling MSF (multispeed fiber) interrupts
*/
static void
ixgbe_handle_msf(void *context, int pending)
{
	struct adapter  *adapter = context;
	struct ixgbe_hw *hw = &adapter->hw;
	u32 autoneg;
	bool negotiate;
	int err;

	err = hw->phy.ops.identify_sfp(hw);
	if (!err) {
		ixgbe_setup_optics(adapter);
		INIT_DEBUGOUT1("ixgbe_sfp_probe: flags: %X\n", adapter->optics);
	}

	autoneg = hw->phy.autoneg_advertised;
	if ((!autoneg) && (hw->mac.ops.get_link_capabilities))
		hw->mac.ops.get_link_capabilities(hw, &autoneg, &negotiate);
	if (hw->mac.ops.setup_link)
		hw->mac.ops.setup_link(hw, autoneg, TRUE);

	ifmedia_removeall(&adapter->media);
	ixgbe_add_media_types(adapter);
	return;
}

/*
** Tasklet for handling interrupts from an external PHY
*/
static void
ixgbe_handle_phy(void *context, int pending)
{
	struct adapter  *adapter = context;
	struct ixgbe_hw *hw = &adapter->hw;
	int error;

	error = hw->phy.ops.handle_lasi(hw);
	if (error == IXGBE_ERR_OVERTEMP)
		device_printf(adapter->dev,
		    "CRITICAL: EXTERNAL PHY OVER TEMP!! "
		    " PHY will downshift to lower power state!\n");
	else if (error)
		device_printf(adapter->dev,
		    "Error handling LASI interrupt: %d\n",
		    error);
	return;
}

#ifdef IXGBE_FDIR
/*
** Tasklet for reinitializing the Flow Director filter table
*/
static void
ixgbe_reinit_fdir(void *context, int pending)
{
	struct adapter  *adapter = context;
	struct ifnet   *ifp = adapter->ifp;

	if (adapter->fdir_reinit != 1) /* Shouldn't happen */
		return;
	ixgbe_reinit_fdir_tables_82599(&adapter->hw);
	adapter->fdir_reinit = 0;
	/* re-enable flow director interrupts */
	IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMS, IXGBE_EIMS_FLOW_DIR);
	/* Restart the interface */
	ifp->if_drv_flags |= IFF_DRV_RUNNING;
	return;
}
#endif

/*********************************************************************
 *
 *  Configure DMA Coalescing
 *
 **********************************************************************/
static void
ixgbe_config_dmac(struct adapter *adapter)
{
	struct ixgbe_hw *hw = &adapter->hw;
	struct ixgbe_dmac_config *dcfg = &hw->mac.dmac_config;

	if (hw->mac.type < ixgbe_mac_X550 ||
	    !hw->mac.ops.dmac_config)
		return;

	if (dcfg->watchdog_timer ^ adapter->dmac ||
	    dcfg->link_speed ^ adapter->link_speed) {
		dcfg->watchdog_timer = adapter->dmac;
		dcfg->fcoe_en = false;
		dcfg->link_speed = adapter->link_speed;
		dcfg->num_tcs = 1;

		INIT_DEBUGOUT2("dmac settings: watchdog %d, link speed %d\n",
		    dcfg->watchdog_timer, dcfg->link_speed);

		hw->mac.ops.dmac_config(hw);
	}
}

/*
 * Checks whether the adapter supports Energy Efficient Ethernet
 * or not, based on device ID.
 */
static void
ixgbe_check_eee_support(struct adapter *adapter)
{
	struct ixgbe_hw *hw = &adapter->hw;

	adapter->eee_support = adapter->eee_enabled =
	    (hw->device_id == IXGBE_DEV_ID_X550T ||
	        hw->device_id == IXGBE_DEV_ID_X550EM_X_KR);
}

/*
 * Checks whether the adapter's ports are capable of
 * Wake On LAN by reading the adapter's NVM.
 *
 * Sets each port's hw->wol_enabled value depending
 * on the value read here.
 */
static void
ixgbe_check_wol_support(struct adapter *adapter)
{
	struct ixgbe_hw *hw = &adapter->hw;
	u16 dev_caps = 0;

	/* Find out WoL support for port */
	adapter->wol_support = hw->wol_enabled = 0;
	ixgbe_get_device_caps(hw, &dev_caps);
	if ((dev_caps & IXGBE_DEVICE_CAPS_WOL_PORT0_1) ||
	    ((dev_caps & IXGBE_DEVICE_CAPS_WOL_PORT0) &&
	        hw->bus.func == 0))
	    adapter->wol_support = hw->wol_enabled = 1;

	/* Save initial wake up filter configuration */
	adapter->wufc = IXGBE_READ_REG(hw, IXGBE_WUFC);

	return;
}

/*
 * Prepare the adapter/port for LPLU and/or WoL
 */
static int
ixgbe_setup_low_power_mode(struct adapter *adapter)
{
	struct ixgbe_hw *hw = &adapter->hw;
	device_t dev = adapter->dev;
	s32 error = 0;

	mtx_assert(&adapter->core_mtx, MA_OWNED);

	/* Limit power management flow to X550EM baseT */
	if (hw->device_id == IXGBE_DEV_ID_X550EM_X_10G_T
	    && hw->phy.ops.enter_lplu) {
		/* Turn off support for APM wakeup. (Using ACPI instead) */
		IXGBE_WRITE_REG(hw, IXGBE_GRC,
		    IXGBE_READ_REG(hw, IXGBE_GRC) & ~(u32)2);

		/*
		 * Clear Wake Up Status register to prevent any previous wakeup
		 * events from waking us up immediately after we suspend.
		 */
		IXGBE_WRITE_REG(hw, IXGBE_WUS, 0xffffffff);

		/*
		 * Program the Wakeup Filter Control register with user filter
		 * settings
		 */
		IXGBE_WRITE_REG(hw, IXGBE_WUFC, adapter->wufc);

		/* Enable wakeups and power management in Wakeup Control */
		IXGBE_WRITE_REG(hw, IXGBE_WUC,
		    IXGBE_WUC_WKEN | IXGBE_WUC_PME_EN);

		/* X550EM baseT adapters need a special LPLU flow */
		hw->phy.reset_disable = true;
		ixgbe_stop(adapter);
		error = hw->phy.ops.enter_lplu(hw);
		if (error)
			device_printf(dev,
			    "Error entering LPLU: %d\n", error);
		hw->phy.reset_disable = false;
	} else {
		/* Just stop for other adapters */
		ixgbe_stop(adapter);
	}

	return error;
}

/**********************************************************************
 *
 *  Update the board statistics counters.
 *
 **********************************************************************/
static void
ixgbe_update_stats_counters(struct adapter *adapter)
{
	struct ixgbe_hw *hw = &adapter->hw;
	u32 missed_rx = 0, bprc, lxon, lxoff, total;
	u64 total_missed_rx = 0;

	adapter->stats.pf.crcerrs += IXGBE_READ_REG(hw, IXGBE_CRCERRS);
	adapter->stats.pf.illerrc += IXGBE_READ_REG(hw, IXGBE_ILLERRC);
	adapter->stats.pf.errbc += IXGBE_READ_REG(hw, IXGBE_ERRBC);
	adapter->stats.pf.mspdc += IXGBE_READ_REG(hw, IXGBE_MSPDC);

	for (int i = 0; i < 16; i++) {
		adapter->stats.pf.qprc[i] += IXGBE_READ_REG(hw, IXGBE_QPRC(i));
		adapter->stats.pf.qptc[i] += IXGBE_READ_REG(hw, IXGBE_QPTC(i));
		adapter->stats.pf.qprdc[i] += IXGBE_READ_REG(hw, IXGBE_QPRDC(i));
	}
	adapter->stats.pf.mlfc += IXGBE_READ_REG(hw, IXGBE_MLFC);
	adapter->stats.pf.mrfc += IXGBE_READ_REG(hw, IXGBE_MRFC);
	adapter->stats.pf.rlec += IXGBE_READ_REG(hw, IXGBE_RLEC);

	/* Hardware workaround, gprc counts missed packets */
	adapter->stats.pf.gprc += IXGBE_READ_REG(hw, IXGBE_GPRC);
	adapter->stats.pf.gprc -= missed_rx;

	if (hw->mac.type != ixgbe_mac_82598EB) {
		adapter->stats.pf.gorc += IXGBE_READ_REG(hw, IXGBE_GORCL) +
		    ((u64)IXGBE_READ_REG(hw, IXGBE_GORCH) << 32);
		adapter->stats.pf.gotc += IXGBE_READ_REG(hw, IXGBE_GOTCL) +
		    ((u64)IXGBE_READ_REG(hw, IXGBE_GOTCH) << 32);
		adapter->stats.pf.tor += IXGBE_READ_REG(hw, IXGBE_TORL) +
		    ((u64)IXGBE_READ_REG(hw, IXGBE_TORH) << 32);
		adapter->stats.pf.lxonrxc += IXGBE_READ_REG(hw, IXGBE_LXONRXCNT);
		adapter->stats.pf.lxoffrxc += IXGBE_READ_REG(hw, IXGBE_LXOFFRXCNT);
	} else {
		adapter->stats.pf.lxonrxc += IXGBE_READ_REG(hw, IXGBE_LXONRXC);
		adapter->stats.pf.lxoffrxc += IXGBE_READ_REG(hw, IXGBE_LXOFFRXC);
		/* 82598 only has a counter in the high register */
		adapter->stats.pf.gorc += IXGBE_READ_REG(hw, IXGBE_GORCH);
		adapter->stats.pf.gotc += IXGBE_READ_REG(hw, IXGBE_GOTCH);
		adapter->stats.pf.tor += IXGBE_READ_REG(hw, IXGBE_TORH);
	}

	/*
	 * Workaround: mprc hardware is incorrectly counting
	 * broadcasts, so for now we subtract those.
	 */
	bprc = IXGBE_READ_REG(hw, IXGBE_BPRC);
	adapter->stats.pf.bprc += bprc;
	adapter->stats.pf.mprc += IXGBE_READ_REG(hw, IXGBE_MPRC);
	if (hw->mac.type == ixgbe_mac_82598EB)
		adapter->stats.pf.mprc -= bprc;

	adapter->stats.pf.prc64 += IXGBE_READ_REG(hw, IXGBE_PRC64);
	adapter->stats.pf.prc127 += IXGBE_READ_REG(hw, IXGBE_PRC127);
	adapter->stats.pf.prc255 += IXGBE_READ_REG(hw, IXGBE_PRC255);
	adapter->stats.pf.prc511 += IXGBE_READ_REG(hw, IXGBE_PRC511);
	adapter->stats.pf.prc1023 += IXGBE_READ_REG(hw, IXGBE_PRC1023);
	adapter->stats.pf.prc1522 += IXGBE_READ_REG(hw, IXGBE_PRC1522);

	lxon = IXGBE_READ_REG(hw, IXGBE_LXONTXC);
	adapter->stats.pf.lxontxc += lxon;
	lxoff = IXGBE_READ_REG(hw, IXGBE_LXOFFTXC);
	adapter->stats.pf.lxofftxc += lxoff;
	total = lxon + lxoff;

	adapter->stats.pf.gptc += IXGBE_READ_REG(hw, IXGBE_GPTC);
	adapter->stats.pf.mptc += IXGBE_READ_REG(hw, IXGBE_MPTC);
	adapter->stats.pf.ptc64 += IXGBE_READ_REG(hw, IXGBE_PTC64);
	adapter->stats.pf.gptc -= total;
	adapter->stats.pf.mptc -= total;
	adapter->stats.pf.ptc64 -= total;
	adapter->stats.pf.gotc -= total * ETHER_MIN_LEN;

	adapter->stats.pf.ruc += IXGBE_READ_REG(hw, IXGBE_RUC);
	adapter->stats.pf.rfc += IXGBE_READ_REG(hw, IXGBE_RFC);
	adapter->stats.pf.roc += IXGBE_READ_REG(hw, IXGBE_ROC);
	adapter->stats.pf.rjc += IXGBE_READ_REG(hw, IXGBE_RJC);
	adapter->stats.pf.mngprc += IXGBE_READ_REG(hw, IXGBE_MNGPRC);
	adapter->stats.pf.mngpdc += IXGBE_READ_REG(hw, IXGBE_MNGPDC);
	adapter->stats.pf.mngptc += IXGBE_READ_REG(hw, IXGBE_MNGPTC);
	adapter->stats.pf.tpr += IXGBE_READ_REG(hw, IXGBE_TPR);
	adapter->stats.pf.tpt += IXGBE_READ_REG(hw, IXGBE_TPT);
	adapter->stats.pf.ptc127 += IXGBE_READ_REG(hw, IXGBE_PTC127);
	adapter->stats.pf.ptc255 += IXGBE_READ_REG(hw, IXGBE_PTC255);
	adapter->stats.pf.ptc511 += IXGBE_READ_REG(hw, IXGBE_PTC511);
	adapter->stats.pf.ptc1023 += IXGBE_READ_REG(hw, IXGBE_PTC1023);
	adapter->stats.pf.ptc1522 += IXGBE_READ_REG(hw, IXGBE_PTC1522);
	adapter->stats.pf.bptc += IXGBE_READ_REG(hw, IXGBE_BPTC);
	adapter->stats.pf.xec += IXGBE_READ_REG(hw, IXGBE_XEC);
	adapter->stats.pf.fccrc += IXGBE_READ_REG(hw, IXGBE_FCCRC);
	adapter->stats.pf.fclast += IXGBE_READ_REG(hw, IXGBE_FCLAST);
	/* Only read FCOE on 82599 */
	if (hw->mac.type != ixgbe_mac_82598EB) {
		adapter->stats.pf.fcoerpdc += IXGBE_READ_REG(hw, IXGBE_FCOERPDC);
		adapter->stats.pf.fcoeprc += IXGBE_READ_REG(hw, IXGBE_FCOEPRC);
		adapter->stats.pf.fcoeptc += IXGBE_READ_REG(hw, IXGBE_FCOEPTC);
		adapter->stats.pf.fcoedwrc += IXGBE_READ_REG(hw, IXGBE_FCOEDWRC);
		adapter->stats.pf.fcoedwtc += IXGBE_READ_REG(hw, IXGBE_FCOEDWTC);
	}

	/* Fill out the OS statistics structure */
	IXGBE_SET_IPACKETS(adapter, adapter->stats.pf.gprc);
	IXGBE_SET_OPACKETS(adapter, adapter->stats.pf.gptc);
	IXGBE_SET_IBYTES(adapter, adapter->stats.pf.gorc);
	IXGBE_SET_OBYTES(adapter, adapter->stats.pf.gotc);
	IXGBE_SET_IMCASTS(adapter, adapter->stats.pf.mprc);
	IXGBE_SET_OMCASTS(adapter, adapter->stats.pf.mptc);
	IXGBE_SET_COLLISIONS(adapter, 0);
	IXGBE_SET_IQDROPS(adapter, total_missed_rx);
	IXGBE_SET_IERRORS(adapter, adapter->stats.pf.crcerrs
	    + adapter->stats.pf.rlec);
}

#if __FreeBSD_version >= 1100036
static uint64_t
ixgbe_get_counter(struct ifnet *ifp, ift_counter cnt)
{
	struct adapter *adapter;
	struct tx_ring *txr;
	uint64_t rv;

	adapter = if_getsoftc(ifp);

	switch (cnt) {
	case IFCOUNTER_IPACKETS:
		return (adapter->ipackets);
	case IFCOUNTER_OPACKETS:
		return (adapter->opackets);
	case IFCOUNTER_IBYTES:
		return (adapter->ibytes);
	case IFCOUNTER_OBYTES:
		return (adapter->obytes);
	case IFCOUNTER_IMCASTS:
		return (adapter->imcasts);
	case IFCOUNTER_OMCASTS:
		return (adapter->omcasts);
	case IFCOUNTER_COLLISIONS:
		return (0);
	case IFCOUNTER_IQDROPS:
		return (adapter->iqdrops);
	case IFCOUNTER_OQDROPS:
		rv = 0;
		txr = adapter->tx_rings;
		for (int i = 0; i < adapter->num_queues; i++, txr++)
			rv += txr->br->br_drops;
		return (rv);
	case IFCOUNTER_IERRORS:
		return (adapter->ierrors);
	default:
		return (if_get_counter_default(ifp, cnt));
	}
}
#endif

/** ixgbe_sysctl_tdh_handler - Handler function
 *  Retrieves the TDH value from the hardware
 */
static int
ixgbe_sysctl_tdh_handler(SYSCTL_HANDLER_ARGS)
{
	int error;

	struct tx_ring *txr = ((struct tx_ring *)oidp->oid_arg1);
	if (!txr) return 0;

	unsigned val = IXGBE_READ_REG(&txr->adapter->hw, IXGBE_TDH(txr->me));
	error = sysctl_handle_int(oidp, &val, 0, req);
	if (error || !req->newptr)
		return error;
	return 0;
}

/** ixgbe_sysctl_tdt_handler - Handler function
 *  Retrieves the TDT value from the hardware
 */
static int
ixgbe_sysctl_tdt_handler(SYSCTL_HANDLER_ARGS)
{
	int error;

	struct tx_ring *txr = ((struct tx_ring *)oidp->oid_arg1);
	if (!txr) return 0;

	unsigned val = IXGBE_READ_REG(&txr->adapter->hw, IXGBE_TDT(txr->me));
	error = sysctl_handle_int(oidp, &val, 0, req);
	if (error || !req->newptr)
		return error;
	return 0;
}

/** ixgbe_sysctl_rdh_handler - Handler function
 *  Retrieves the RDH value from the hardware
 */
static int
ixgbe_sysctl_rdh_handler(SYSCTL_HANDLER_ARGS)
{
	int error;

	struct rx_ring *rxr = ((struct rx_ring *)oidp->oid_arg1);
	if (!rxr) return 0;

	unsigned val = IXGBE_READ_REG(&rxr->adapter->hw, IXGBE_RDH(rxr->me));
	error = sysctl_handle_int(oidp, &val, 0, req);
	if (error || !req->newptr)
		return error;
	return 0;
}

/** ixgbe_sysctl_rdt_handler - Handler function
 *  Retrieves the RDT value from the hardware
 */
static int
ixgbe_sysctl_rdt_handler(SYSCTL_HANDLER_ARGS)
{
	int error;

	struct rx_ring *rxr = ((struct rx_ring *)oidp->oid_arg1);
	if (!rxr) return 0;

	unsigned val = IXGBE_READ_REG(&rxr->adapter->hw, IXGBE_RDT(rxr->me));
	error = sysctl_handle_int(oidp, &val, 0, req);
	if (error || !req->newptr)
		return error;
	return 0;
}

static int
ixgbe_sysctl_interrupt_rate_handler(SYSCTL_HANDLER_ARGS)
{
	int error;
	struct ix_queue *que = ((struct ix_queue *)oidp->oid_arg1);
	unsigned int reg, usec, rate;

	reg = IXGBE_READ_REG(&que->adapter->hw, IXGBE_EITR(que->msix));
	usec = ((reg & 0x0FF8) >> 3);
	if (usec > 0)
		rate = 500000 / usec;
	else
		rate = 0;
	error = sysctl_handle_int(oidp, &rate, 0, req);
	if (error || !req->newptr)
		return error;
	reg &= ~0xfff; /* default, no limitation */
	ixgbe_max_interrupt_rate = 0;
	if (rate > 0 && rate < 500000) {
		if (rate < 1000)
			rate = 1000;
		ixgbe_max_interrupt_rate = rate;
		reg |= ((4000000/rate) & 0xff8 );
	}
	IXGBE_WRITE_REG(&que->adapter->hw, IXGBE_EITR(que->msix), reg);
	return 0;
}

static void
ixgbe_add_device_sysctls(struct adapter *adapter)
{
	device_t dev = adapter->dev;
	struct ixgbe_hw *hw = &adapter->hw;
	struct sysctl_oid_list *child;
	struct sysctl_ctx_list *ctx;

	ctx = device_get_sysctl_ctx(dev);
	child = SYSCTL_CHILDREN(device_get_sysctl_tree(dev));

	/* Sysctls for all devices */
	SYSCTL_ADD_PROC(ctx, child, OID_AUTO, "fc",
			CTLTYPE_INT | CTLFLAG_RW, adapter, 0,
			ixgbe_set_flowcntl, "I", IXGBE_SYSCTL_DESC_SET_FC);

        SYSCTL_ADD_INT(ctx, child, OID_AUTO, "enable_aim",
			CTLFLAG_RW,
			&ixgbe_enable_aim, 1, "Interrupt Moderation");

	SYSCTL_ADD_PROC(ctx, child, OID_AUTO, "advertise_speed",
			CTLTYPE_INT | CTLFLAG_RW, adapter, 0,
			ixgbe_set_advertise, "I", IXGBE_SYSCTL_DESC_ADV_SPEED);

	SYSCTL_ADD_PROC(ctx, child, OID_AUTO, "thermal_test",
			CTLTYPE_INT | CTLFLAG_RW, adapter, 0,
			ixgbe_sysctl_thermal_test, "I", "Thermal Test");

	/* for X550 devices */
	if (hw->mac.type >= ixgbe_mac_X550)
		SYSCTL_ADD_PROC(ctx, child, OID_AUTO, "dmac",
				CTLTYPE_INT | CTLFLAG_RW, adapter, 0,
				ixgbe_sysctl_dmac, "I", "DMA Coalesce");

	/* for X550T and X550EM backplane devices */
	if (hw->device_id == IXGBE_DEV_ID_X550T ||
	    hw->device_id == IXGBE_DEV_ID_X550EM_X_KR) {
		struct sysctl_oid *eee_node;
		struct sysctl_oid_list *eee_list;

		eee_node = SYSCTL_ADD_NODE(ctx, child, OID_AUTO, "eee",
					   CTLFLAG_RD, NULL,
					   "Energy Efficient Ethernet sysctls");
		eee_list = SYSCTL_CHILDREN(eee_node);

		SYSCTL_ADD_PROC(ctx, eee_list, OID_AUTO, "enable",
				CTLTYPE_INT | CTLFLAG_RW, adapter, 0,
				ixgbe_sysctl_eee_enable, "I",
				"Enable or Disable EEE");

		SYSCTL_ADD_PROC(ctx, eee_list, OID_AUTO, "negotiated",
				CTLTYPE_INT | CTLFLAG_RD, adapter, 0,
				ixgbe_sysctl_eee_negotiated, "I",
				"EEE negotiated on link");

		SYSCTL_ADD_PROC(ctx, eee_list, OID_AUTO, "tx_lpi_status",
				CTLTYPE_INT | CTLFLAG_RD, adapter, 0,
				ixgbe_sysctl_eee_tx_lpi_status, "I",
				"Whether or not TX link is in LPI state");

		SYSCTL_ADD_PROC(ctx, eee_list, OID_AUTO, "rx_lpi_status",
				CTLTYPE_INT | CTLFLAG_RD, adapter, 0,
				ixgbe_sysctl_eee_rx_lpi_status, "I",
				"Whether or not RX link is in LPI state");
	}

	/* for certain 10GBaseT devices */
	if (hw->device_id == IXGBE_DEV_ID_X550T ||
	    hw->device_id == IXGBE_DEV_ID_X550EM_X_10G_T) {
		SYSCTL_ADD_PROC(ctx, child, OID_AUTO, "wol_enable",
				CTLTYPE_INT | CTLFLAG_RW, adapter, 0,
				ixgbe_sysctl_wol_enable, "I",
				"Enable/Disable Wake on LAN");

		SYSCTL_ADD_PROC(ctx, child, OID_AUTO, "wufc",
				CTLTYPE_INT | CTLFLAG_RW, adapter, 0,
				ixgbe_sysctl_wufc, "I",
				"Enable/Disable Wake Up Filters");
	}

	/* for X550EM 10GBaseT devices */
	if (hw->device_id == IXGBE_DEV_ID_X550EM_X_10G_T) {
		struct sysctl_oid *phy_node;
		struct sysctl_oid_list *phy_list;

		phy_node = SYSCTL_ADD_NODE(ctx, child, OID_AUTO, "phy",
					   CTLFLAG_RD, NULL,
					   "External PHY sysctls");
		phy_list = SYSCTL_CHILDREN(phy_node);

		SYSCTL_ADD_PROC(ctx, phy_list, OID_AUTO, "temp",
				CTLTYPE_INT | CTLFLAG_RD, adapter, 0,
				ixgbe_sysctl_phy_temp, "I",
				"Current External PHY Temperature (Celsius)");

		SYSCTL_ADD_PROC(ctx, phy_list, OID_AUTO, "overtemp_occurred",
				CTLTYPE_INT | CTLFLAG_RD, adapter, 0,
				ixgbe_sysctl_phy_overtemp_occurred, "I",
				"External PHY High Temperature Event Occurred");
	}
}

/*
 * Add sysctl variables, one per statistic, to the system.
 */
static void
ixgbe_add_hw_stats(struct adapter *adapter)
{
	device_t dev = adapter->dev;

	struct tx_ring *txr = adapter->tx_rings;
	struct rx_ring *rxr = adapter->rx_rings;

	struct sysctl_ctx_list *ctx = device_get_sysctl_ctx(dev);
	struct sysctl_oid *tree = device_get_sysctl_tree(dev);
	struct sysctl_oid_list *child = SYSCTL_CHILDREN(tree);
	struct ixgbe_hw_stats *stats = &adapter->stats.pf;

	struct sysctl_oid *stat_node, *queue_node;
	struct sysctl_oid_list *stat_list, *queue_list;

#define QUEUE_NAME_LEN 32
	char namebuf[QUEUE_NAME_LEN];

	/* Driver Statistics */
	SYSCTL_ADD_ULONG(ctx, child, OID_AUTO, "dropped",
			CTLFLAG_RD, &adapter->dropped_pkts,
			"Driver dropped packets");
	SYSCTL_ADD_ULONG(ctx, child, OID_AUTO, "mbuf_defrag_failed",
			CTLFLAG_RD, &adapter->mbuf_defrag_failed,
			"m_defrag() failed");
	SYSCTL_ADD_ULONG(ctx, child, OID_AUTO, "watchdog_events",
			CTLFLAG_RD, &adapter->watchdog_events,
			"Watchdog timeouts");
	SYSCTL_ADD_ULONG(ctx, child, OID_AUTO, "link_irq",
			CTLFLAG_RD, &adapter->link_irq,
			"Link MSIX IRQ Handled");

	for (int i = 0; i < adapter->num_queues; i++, txr++) {
		snprintf(namebuf, QUEUE_NAME_LEN, "queue%d", i);
		queue_node = SYSCTL_ADD_NODE(ctx, child, OID_AUTO, namebuf,
					    CTLFLAG_RD, NULL, "Queue Name");
		queue_list = SYSCTL_CHILDREN(queue_node);

		SYSCTL_ADD_PROC(ctx, queue_list, OID_AUTO, "interrupt_rate",
				CTLTYPE_UINT | CTLFLAG_RW, &adapter->queues[i],
				sizeof(&adapter->queues[i]),
				ixgbe_sysctl_interrupt_rate_handler, "IU",
				"Interrupt Rate");
		SYSCTL_ADD_UQUAD(ctx, queue_list, OID_AUTO, "irqs",
				CTLFLAG_RD, &(adapter->queues[i].irqs),
				"irqs on this queue");
		SYSCTL_ADD_PROC(ctx, queue_list, OID_AUTO, "txd_head",
				CTLTYPE_UINT | CTLFLAG_RD, txr, sizeof(txr),
				ixgbe_sysctl_tdh_handler, "IU",
				"Transmit Descriptor Head");
		SYSCTL_ADD_PROC(ctx, queue_list, OID_AUTO, "txd_tail",
				CTLTYPE_UINT | CTLFLAG_RD, txr, sizeof(txr),
				ixgbe_sysctl_tdt_handler, "IU",
				"Transmit Descriptor Tail");
		SYSCTL_ADD_ULONG(ctx, queue_list, OID_AUTO, "tso_tx",
				CTLFLAG_RD, &txr->tso_tx,
				"TSO");
		SYSCTL_ADD_ULONG(ctx, queue_list, OID_AUTO, "no_tx_dma_setup",
				CTLFLAG_RD, &txr->no_tx_dma_setup,
				"Driver tx dma failure in xmit");
		SYSCTL_ADD_UQUAD(ctx, queue_list, OID_AUTO, "no_desc_avail",
				CTLFLAG_RD, &txr->no_desc_avail,
				"Queue No Descriptor Available");
		SYSCTL_ADD_UQUAD(ctx, queue_list, OID_AUTO, "tx_packets",
				CTLFLAG_RD, &txr->total_packets,
				"Queue Packets Transmitted");
		SYSCTL_ADD_UQUAD(ctx, queue_list, OID_AUTO, "br_drops",
				CTLFLAG_RD, &txr->br->br_drops,
				"Packets dropped in buf_ring");
	}

	for (int i = 0; i < adapter->num_queues; i++, rxr++) {
		snprintf(namebuf, QUEUE_NAME_LEN, "queue%d", i);
		queue_node = SYSCTL_ADD_NODE(ctx, child, OID_AUTO, namebuf,
					    CTLFLAG_RD, NULL, "Queue Name");
		queue_list = SYSCTL_CHILDREN(queue_node);

		struct lro_ctrl *lro = &rxr->lro;

		snprintf(namebuf, QUEUE_NAME_LEN, "queue%d", i);
		queue_node = SYSCTL_ADD_NODE(ctx, child, OID_AUTO, namebuf,
					    CTLFLAG_RD, NULL, "Queue Name");
		queue_list = SYSCTL_CHILDREN(queue_node);

		SYSCTL_ADD_PROC(ctx, queue_list, OID_AUTO, "rxd_head",
				CTLTYPE_UINT | CTLFLAG_RD, rxr, sizeof(rxr),
				ixgbe_sysctl_rdh_handler, "IU",
				"Receive Descriptor Head");
		SYSCTL_ADD_PROC(ctx, queue_list, OID_AUTO, "rxd_tail",
				CTLTYPE_UINT | CTLFLAG_RD, rxr, sizeof(rxr),
				ixgbe_sysctl_rdt_handler, "IU",
				"Receive Descriptor Tail");
		SYSCTL_ADD_UQUAD(ctx, queue_list, OID_AUTO, "rx_packets",
				CTLFLAG_RD, &rxr->rx_packets,
				"Queue Packets Received");
		SYSCTL_ADD_UQUAD(ctx, queue_list, OID_AUTO, "rx_bytes",
				CTLFLAG_RD, &rxr->rx_bytes,
				"Queue Bytes Received");
		SYSCTL_ADD_UQUAD(ctx, queue_list, OID_AUTO, "rx_copies",
				CTLFLAG_RD, &rxr->rx_copies,
				"Copied RX Frames");
		SYSCTL_ADD_INT(ctx, queue_list, OID_AUTO, "lro_queued",
				CTLFLAG_RD, &lro->lro_queued, 0,
				"LRO Queued");
		SYSCTL_ADD_INT(ctx, queue_list, OID_AUTO, "lro_flushed",
				CTLFLAG_RD, &lro->lro_flushed, 0,
				"LRO Flushed");
	}

	/* MAC stats get the own sub node */

	stat_node = SYSCTL_ADD_NODE(ctx, child, OID_AUTO, "mac_stats",
				    CTLFLAG_RD, NULL, "MAC Statistics");
	stat_list = SYSCTL_CHILDREN(stat_node);

	SYSCTL_ADD_UQUAD(ctx, stat_list, OID_AUTO, "crc_errs",
			CTLFLAG_RD, &stats->crcerrs,
			"CRC Errors");
	SYSCTL_ADD_UQUAD(ctx, stat_list, OID_AUTO, "ill_errs",
			CTLFLAG_RD, &stats->illerrc,
			"Illegal Byte Errors");
	SYSCTL_ADD_UQUAD(ctx, stat_list, OID_AUTO, "byte_errs",
			CTLFLAG_RD, &stats->errbc,
			"Byte Errors");
	SYSCTL_ADD_UQUAD(ctx, stat_list, OID_AUTO, "short_discards",
			CTLFLAG_RD, &stats->mspdc,
			"MAC Short Packets Discarded");
	SYSCTL_ADD_UQUAD(ctx, stat_list, OID_AUTO, "local_faults",
			CTLFLAG_RD, &stats->mlfc,
			"MAC Local Faults");
	SYSCTL_ADD_UQUAD(ctx, stat_list, OID_AUTO, "remote_faults",
			CTLFLAG_RD, &stats->mrfc,
			"MAC Remote Faults");
	SYSCTL_ADD_UQUAD(ctx, stat_list, OID_AUTO, "rec_len_errs",
			CTLFLAG_RD, &stats->rlec,
			"Receive Length Errors");

	/* Flow Control stats */
	SYSCTL_ADD_UQUAD(ctx, stat_list, OID_AUTO, "xon_txd",
			CTLFLAG_RD, &stats->lxontxc,
			"Link XON Transmitted");
	SYSCTL_ADD_UQUAD(ctx, stat_list, OID_AUTO, "xon_recvd",
			CTLFLAG_RD, &stats->lxonrxc,
			"Link XON Received");
	SYSCTL_ADD_UQUAD(ctx, stat_list, OID_AUTO, "xoff_txd",
			CTLFLAG_RD, &stats->lxofftxc,
			"Link XOFF Transmitted");
	SYSCTL_ADD_UQUAD(ctx, stat_list, OID_AUTO, "xoff_recvd",
			CTLFLAG_RD, &stats->lxoffrxc,
			"Link XOFF Received");

	/* Packet Reception Stats */
	SYSCTL_ADD_UQUAD(ctx, stat_list, OID_AUTO, "total_octets_rcvd",
			CTLFLAG_RD, &stats->tor,
			"Total Octets Received");
	SYSCTL_ADD_UQUAD(ctx, stat_list, OID_AUTO, "good_octets_rcvd",
			CTLFLAG_RD, &stats->gorc,
			"Good Octets Received");
	SYSCTL_ADD_UQUAD(ctx, stat_list, OID_AUTO, "total_pkts_rcvd",
			CTLFLAG_RD, &stats->tpr,
			"Total Packets Received");
	SYSCTL_ADD_UQUAD(ctx, stat_list, OID_AUTO, "good_pkts_rcvd",
			CTLFLAG_RD, &stats->gprc,
			"Good Packets Received");
	SYSCTL_ADD_UQUAD(ctx, stat_list, OID_AUTO, "mcast_pkts_rcvd",
			CTLFLAG_RD, &stats->mprc,
			"Multicast Packets Received");
	SYSCTL_ADD_UQUAD(ctx, stat_list, OID_AUTO, "bcast_pkts_rcvd",
			CTLFLAG_RD, &stats->bprc,
			"Broadcast Packets Received");
	SYSCTL_ADD_UQUAD(ctx, stat_list, OID_AUTO, "rx_frames_64",
			CTLFLAG_RD, &stats->prc64,
			"64 byte frames received ");
	SYSCTL_ADD_UQUAD(ctx, stat_list, OID_AUTO, "rx_frames_65_127",
			CTLFLAG_RD, &stats->prc127,
			"65-127 byte frames received");
	SYSCTL_ADD_UQUAD(ctx, stat_list, OID_AUTO, "rx_frames_128_255",
			CTLFLAG_RD, &stats->prc255,
			"128-255 byte frames received");
	SYSCTL_ADD_UQUAD(ctx, stat_list, OID_AUTO, "rx_frames_256_511",
			CTLFLAG_RD, &stats->prc511,
			"256-511 byte frames received");
	SYSCTL_ADD_UQUAD(ctx, stat_list, OID_AUTO, "rx_frames_512_1023",
			CTLFLAG_RD, &stats->prc1023,
			"512-1023 byte frames received");
	SYSCTL_ADD_UQUAD(ctx, stat_list, OID_AUTO, "rx_frames_1024_1522",
			CTLFLAG_RD, &stats->prc1522,
			"1023-1522 byte frames received");
	SYSCTL_ADD_UQUAD(ctx, stat_list, OID_AUTO, "recv_undersized",
			CTLFLAG_RD, &stats->ruc,
			"Receive Undersized");
	SYSCTL_ADD_UQUAD(ctx, stat_list, OID_AUTO, "recv_fragmented",
			CTLFLAG_RD, &stats->rfc,
			"Fragmented Packets Received ");
	SYSCTL_ADD_UQUAD(ctx, stat_list, OID_AUTO, "recv_oversized",
			CTLFLAG_RD, &stats->roc,
			"Oversized Packets Received");
	SYSCTL_ADD_UQUAD(ctx, stat_list, OID_AUTO, "recv_jabberd",
			CTLFLAG_RD, &stats->rjc,
			"Received Jabber");
	SYSCTL_ADD_UQUAD(ctx, stat_list, OID_AUTO, "management_pkts_rcvd",
			CTLFLAG_RD, &stats->mngprc,
			"Management Packets Received");
	SYSCTL_ADD_UQUAD(ctx, stat_list, OID_AUTO, "management_pkts_drpd",
			CTLFLAG_RD, &stats->mngptc,
			"Management Packets Dropped");
	SYSCTL_ADD_UQUAD(ctx, stat_list, OID_AUTO, "checksum_errs",
			CTLFLAG_RD, &stats->xec,
			"Checksum Errors");

	/* Packet Transmission Stats */
	SYSCTL_ADD_UQUAD(ctx, stat_list, OID_AUTO, "good_octets_txd",
			CTLFLAG_RD, &stats->gotc,
			"Good Octets Transmitted");
	SYSCTL_ADD_UQUAD(ctx, stat_list, OID_AUTO, "total_pkts_txd",
			CTLFLAG_RD, &stats->tpt,
			"Total Packets Transmitted");
	SYSCTL_ADD_UQUAD(ctx, stat_list, OID_AUTO, "good_pkts_txd",
			CTLFLAG_RD, &stats->gptc,
			"Good Packets Transmitted");
	SYSCTL_ADD_UQUAD(ctx, stat_list, OID_AUTO, "bcast_pkts_txd",
			CTLFLAG_RD, &stats->bptc,
			"Broadcast Packets Transmitted");
	SYSCTL_ADD_UQUAD(ctx, stat_list, OID_AUTO, "mcast_pkts_txd",
			CTLFLAG_RD, &stats->mptc,
			"Multicast Packets Transmitted");
	SYSCTL_ADD_UQUAD(ctx, stat_list, OID_AUTO, "management_pkts_txd",
			CTLFLAG_RD, &stats->mngptc,
			"Management Packets Transmitted");
	SYSCTL_ADD_UQUAD(ctx, stat_list, OID_AUTO, "tx_frames_64",
			CTLFLAG_RD, &stats->ptc64,
			"64 byte frames transmitted ");
	SYSCTL_ADD_UQUAD(ctx, stat_list, OID_AUTO, "tx_frames_65_127",
			CTLFLAG_RD, &stats->ptc127,
			"65-127 byte frames transmitted");
	SYSCTL_ADD_UQUAD(ctx, stat_list, OID_AUTO, "tx_frames_128_255",
			CTLFLAG_RD, &stats->ptc255,
			"128-255 byte frames transmitted");
	SYSCTL_ADD_UQUAD(ctx, stat_list, OID_AUTO, "tx_frames_256_511",
			CTLFLAG_RD, &stats->ptc511,
			"256-511 byte frames transmitted");
	SYSCTL_ADD_UQUAD(ctx, stat_list, OID_AUTO, "tx_frames_512_1023",
			CTLFLAG_RD, &stats->ptc1023,
			"512-1023 byte frames transmitted");
	SYSCTL_ADD_UQUAD(ctx, stat_list, OID_AUTO, "tx_frames_1024_1522",
			CTLFLAG_RD, &stats->ptc1522,
			"1024-1522 byte frames transmitted");
}

/*
** Set flow control using sysctl:
** Flow control values:
** 	0 - off
**	1 - rx pause
**	2 - tx pause
**	3 - full
*/
static int
ixgbe_set_flowcntl(SYSCTL_HANDLER_ARGS)
{
	int error, last;
	struct adapter *adapter = (struct adapter *) arg1;

	last = adapter->fc;
	error = sysctl_handle_int(oidp, &adapter->fc, 0, req);
	if ((error) || (req->newptr == NULL))
		return (error);

	/* Don't bother if it's not changed */
	if (adapter->fc == last)
		return (0);

	switch (adapter->fc) {
		case ixgbe_fc_rx_pause:
		case ixgbe_fc_tx_pause:
		case ixgbe_fc_full:
			adapter->hw.fc.requested_mode = adapter->fc;
			if (adapter->num_queues > 1)
				ixgbe_disable_rx_drop(adapter);
			break;
		case ixgbe_fc_none:
			adapter->hw.fc.requested_mode = ixgbe_fc_none;
			if (adapter->num_queues > 1)
				ixgbe_enable_rx_drop(adapter);
			break;
		default:
			adapter->fc = last;
			return (EINVAL);
	}
	/* Don't autoneg if forcing a value */
	adapter->hw.fc.disable_fc_autoneg = TRUE;
	ixgbe_fc_enable(&adapter->hw);
	return error;
}

/*
** Control advertised link speed:
**	Flags:
**	0x1 - advertise 100 Mb
**	0x2 - advertise 1G
**	0x4 - advertise 10G
*/
static int
ixgbe_set_advertise(SYSCTL_HANDLER_ARGS)
{
	int			error = 0, requested;
	struct adapter		*adapter;
	device_t		dev;
	struct ixgbe_hw		*hw;
	ixgbe_link_speed	speed = 0;

	adapter = (struct adapter *) arg1;
	dev = adapter->dev;
	hw = &adapter->hw;

	requested = adapter->advertise;
	error = sysctl_handle_int(oidp, &requested, 0, req);
	if ((error) || (req->newptr == NULL))
		return (error);

	/* Checks to validate new value */
	if (adapter->advertise == requested) /* no change */
		return (0);

	if (!((hw->phy.media_type == ixgbe_media_type_copper) ||
	    (hw->phy.multispeed_fiber))) {
		device_printf(dev,
		    "Advertised speed can only be set on copper or "
		    "multispeed fiber media types.\n");
		return (EINVAL);
	}

	if (requested < 0x1 || requested > 0x7) {
		device_printf(dev,
		    "Invalid advertised speed; valid modes are 0x1 through 0x7\n");
		return (EINVAL);
	}

	if ((requested & 0x1)
	    && (hw->mac.type != ixgbe_mac_X540)
	    && (hw->mac.type != ixgbe_mac_X550)) {
		device_printf(dev, "Set Advertise: 100Mb on X540/X550 only\n");
		return (EINVAL);
	}

	/* Set new value and report new advertised mode */
	if (requested & 0x1)
		speed |= IXGBE_LINK_SPEED_100_FULL;
	if (requested & 0x2)
		speed |= IXGBE_LINK_SPEED_1GB_FULL;
	if (requested & 0x4)
		speed |= IXGBE_LINK_SPEED_10GB_FULL;

	hw->mac.autotry_restart = TRUE;
	hw->mac.ops.setup_link(hw, speed, TRUE);
	adapter->advertise = requested;

	return (error);
}

/*
 * The following two sysctls are for X550 BaseT devices;
 * they deal with the external PHY used in them.
 */
static int
ixgbe_sysctl_phy_temp(SYSCTL_HANDLER_ARGS)
{
	struct adapter	*adapter = (struct adapter *) arg1;
	struct ixgbe_hw *hw = &adapter->hw;
	u16 reg;

	if (hw->device_id != IXGBE_DEV_ID_X550EM_X_10G_T) {
		device_printf(adapter->dev,
		    "Device has no supported external thermal sensor.\n");
		return (ENODEV);
	}

	if (hw->phy.ops.read_reg(hw, IXGBE_PHY_CURRENT_TEMP,
				      IXGBE_MDIO_VENDOR_SPECIFIC_1_DEV_TYPE,
				      &reg)) {
		device_printf(adapter->dev,
		    "Error reading from PHY's current temperature register\n");
		return (EAGAIN);
	}

	/* Shift temp for output */
	reg = reg >> 8;

	return (sysctl_handle_int(oidp, NULL, reg, req));
}

/*
 * Reports whether the current PHY temperature is over
 * the overtemp threshold.
 *  - This is reported directly from the PHY
 */
static int
ixgbe_sysctl_phy_overtemp_occurred(SYSCTL_HANDLER_ARGS)
{
	struct adapter	*adapter = (struct adapter *) arg1;
	struct ixgbe_hw *hw = &adapter->hw;
	u16 reg;

	if (hw->device_id != IXGBE_DEV_ID_X550EM_X_10G_T) {
		device_printf(adapter->dev,
		    "Device has no supported external thermal sensor.\n");
		return (ENODEV);
	}

	if (hw->phy.ops.read_reg(hw, IXGBE_PHY_OVERTEMP_STATUS,
				      IXGBE_MDIO_VENDOR_SPECIFIC_1_DEV_TYPE,
				      &reg)) {
		device_printf(adapter->dev,
		    "Error reading from PHY's temperature status register\n");
		return (EAGAIN);
	}

	/* Get occurrence bit */
	reg = !!(reg & 0x4000);
	return (sysctl_handle_int(oidp, 0, reg, req));
}

/*
** Thermal Shutdown Trigger (internal MAC)
**   - Set this to 1 to cause an overtemp event to occur
*/
static int
ixgbe_sysctl_thermal_test(SYSCTL_HANDLER_ARGS)
{
	struct adapter	*adapter = (struct adapter *) arg1;
	struct ixgbe_hw *hw = &adapter->hw;
	int error, fire = 0;

	error = sysctl_handle_int(oidp, &fire, 0, req);
	if ((error) || (req->newptr == NULL))
		return (error);

	if (fire) {
		u32 reg = IXGBE_READ_REG(hw, IXGBE_EICS);
		reg |= IXGBE_EICR_TS;
		IXGBE_WRITE_REG(hw, IXGBE_EICS, reg);
	}

	return (0);
}

/*
** Manage DMA Coalescing.
** Control values:
** 	0/1 - off / on (use default value of 1000)
**
**	Legal timer values are:
**	50,100,250,500,1000,2000,5000,10000
**
**	Turning off interrupt moderation will also turn this off.
*/
static int
ixgbe_sysctl_dmac(SYSCTL_HANDLER_ARGS)
{
	struct adapter *adapter = (struct adapter *) arg1;
	struct ixgbe_hw *hw = &adapter->hw;
	struct ifnet *ifp = adapter->ifp;
	int		error;
	u16		oldval;

	oldval = adapter->dmac;
	error = sysctl_handle_int(oidp, &adapter->dmac, 0, req);
	if ((error) || (req->newptr == NULL))
		return (error);

	switch (hw->mac.type) {
	case ixgbe_mac_X550:
	case ixgbe_mac_X550EM_x:
		break;
	default:
		device_printf(adapter->dev,
		    "DMA Coalescing is only supported on X550 devices\n");
		return (ENODEV);
	}

	switch (adapter->dmac) {
	case 0:
		/* Disabled */
		break;
	case 1: /* Enable and use default */
		adapter->dmac = 1000;
		break;
	case 50:
	case 100:
	case 250:
	case 500:
	case 1000:
	case 2000:
	case 5000:
	case 10000:
		/* Legal values - allow */
		break;
	default:
		/* Do nothing, illegal value */
		adapter->dmac = oldval;
		return (EINVAL);
	}

	/* Re-initialize hardware if it's already running */
	if (ifp->if_drv_flags & IFF_DRV_RUNNING)
		ixgbe_init(adapter);

	return (0);
}

/*
 * Sysctl to enable/disable the WoL capability, if supported by the adapter.
 * Values:
 *	0 - disabled
 *	1 - enabled
 */
static int
ixgbe_sysctl_wol_enable(SYSCTL_HANDLER_ARGS)
{
	struct adapter *adapter = (struct adapter *) arg1;
	struct ixgbe_hw *hw = &adapter->hw;
	int new_wol_enabled;
	int error = 0;

	new_wol_enabled = hw->wol_enabled;
	error = sysctl_handle_int(oidp, &new_wol_enabled, 0, req);
	if ((error) || (req->newptr == NULL))
		return (error);
	if (new_wol_enabled == hw->wol_enabled)
		return (0);

	if (new_wol_enabled > 0 && !adapter->wol_support)
		return (ENODEV);
	else
		hw->wol_enabled = !!(new_wol_enabled);

	return (0);
}

/*
 * Sysctl to enable/disable the Energy Efficient Ethernet capability,
 * if supported by the adapter.
 * Values:
 *	0 - disabled
 *	1 - enabled
 */
static int
ixgbe_sysctl_eee_enable(SYSCTL_HANDLER_ARGS)
{
	struct adapter *adapter = (struct adapter *) arg1;
	struct ifnet *ifp = adapter->ifp;
	int new_eee_enabled, error = 0;

	new_eee_enabled = adapter->eee_enabled;
	error = sysctl_handle_int(oidp, &new_eee_enabled, 0, req);
	if ((error) || (req->newptr == NULL))
		return (error);
	if (new_eee_enabled == adapter->eee_enabled)
		return (0);

	if (new_eee_enabled > 0 && !adapter->eee_support)
		return (ENODEV);
	else
		adapter->eee_enabled = !!(new_eee_enabled);

	/* Re-initialize hardware if it's already running */
	if (ifp->if_drv_flags & IFF_DRV_RUNNING)
		ixgbe_init(adapter);

	return (0);
}

/*
 * Read-only sysctl indicating whether EEE support was negotiated
 * on the link.
 */
static int
ixgbe_sysctl_eee_negotiated(SYSCTL_HANDLER_ARGS)
{
	struct adapter *adapter = (struct adapter *) arg1;
	struct ixgbe_hw *hw = &adapter->hw;
	bool status;

	status = !!(IXGBE_READ_REG(hw, IXGBE_EEE_STAT) & IXGBE_EEE_STAT_NEG);

	return (sysctl_handle_int(oidp, 0, status, req));
}

/*
 * Read-only sysctl indicating whether RX Link is in LPI state.
 */
static int
ixgbe_sysctl_eee_rx_lpi_status(SYSCTL_HANDLER_ARGS)
{
	struct adapter *adapter = (struct adapter *) arg1;
	struct ixgbe_hw *hw = &adapter->hw;
	bool status;

	status = !!(IXGBE_READ_REG(hw, IXGBE_EEE_STAT) &
	    IXGBE_EEE_RX_LPI_STATUS);

	return (sysctl_handle_int(oidp, 0, status, req));
}

/*
 * Read-only sysctl indicating whether TX Link is in LPI state.
 */
static int
ixgbe_sysctl_eee_tx_lpi_status(SYSCTL_HANDLER_ARGS)
{
	struct adapter *adapter = (struct adapter *) arg1;
	struct ixgbe_hw *hw = &adapter->hw;
	bool status;

	status = !!(IXGBE_READ_REG(hw, IXGBE_EEE_STAT) &
	    IXGBE_EEE_TX_LPI_STATUS);

	return (sysctl_handle_int(oidp, 0, status, req));
}

/*
 * Sysctl to enable/disable the types of packets that the
 * adapter will wake up on upon receipt.
 * WUFC - Wake Up Filter Control
 * Flags:
 *	0x1  - Link Status Change
 *	0x2  - Magic Packet
 *	0x4  - Direct Exact
 *	0x8  - Directed Multicast
 *	0x10 - Broadcast
 *	0x20 - ARP/IPv4 Request Packet
 *	0x40 - Direct IPv4 Packet
 *	0x80 - Direct IPv6 Packet
 *
 * Setting another flag will cause the sysctl to return an
 * error.
 */
static int
ixgbe_sysctl_wufc(SYSCTL_HANDLER_ARGS)
{
	struct adapter *adapter = (struct adapter *) arg1;
	int error = 0;
	u32 new_wufc;

	new_wufc = adapter->wufc;

	error = sysctl_handle_int(oidp, &new_wufc, 0, req);
	if ((error) || (req->newptr == NULL))
		return (error);
	if (new_wufc == adapter->wufc)
		return (0);

	if (new_wufc & 0xffffff00)
		return (EINVAL);
	else {
		new_wufc &= 0xff;
		new_wufc |= (0xffffff & adapter->wufc);
		adapter->wufc = new_wufc;
	}

	return (0);
}

/*
** Enable the hardware to drop packets when the buffer is
** full. This is useful when multiqueue,so that no single
** queue being full stalls the entire RX engine. We only
** enable this when Multiqueue AND when Flow Control is
** disabled.
*/
static void
ixgbe_enable_rx_drop(struct adapter *adapter)
{
        struct ixgbe_hw *hw = &adapter->hw;

	for (int i = 0; i < adapter->num_queues; i++) {
        	u32 srrctl = IXGBE_READ_REG(hw, IXGBE_SRRCTL(i));
        	srrctl |= IXGBE_SRRCTL_DROP_EN;
        	IXGBE_WRITE_REG(hw, IXGBE_SRRCTL(i), srrctl);
	}
}

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

	for (int i = 0; i < adapter->num_queues; i++) {
        	u32 srrctl = IXGBE_READ_REG(hw, IXGBE_SRRCTL(i));
        	srrctl &= ~IXGBE_SRRCTL_DROP_EN;
        	IXGBE_WRITE_REG(hw, IXGBE_SRRCTL(i), srrctl);
	}
}

static void
ixgbe_rearm_queues(struct adapter *adapter, u64 queues)
{
	u32 mask;

	switch (adapter->hw.mac.type) {
	case ixgbe_mac_82598EB:
		mask = (IXGBE_EIMS_RTX_QUEUE & queues);
		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:
		mask = (queues & 0xFFFFFFFF);
		IXGBE_WRITE_REG(&adapter->hw, IXGBE_EICS_EX(0), mask);
		mask = (queues >> 32);
		IXGBE_WRITE_REG(&adapter->hw, IXGBE_EICS_EX(1), mask);
		break;
	default:
		break;
	}
}