xref: /freebsd/sys/dev/ixgbe/if_ix.c (revision 89d4096950c4db748e39758c941cfb708c2ff808)

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

  Copyright (c) 2001-2017, 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.

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

#include "opt_inet.h"
#include "opt_inet6.h"
#include "opt_rss.h"

#include "ixgbe.h"
#include "ixgbe_sriov.h"
#include "ifdi_if.h"

#include <net/netmap.h>
#include <dev/netmap/netmap_kern.h>

/************************************************************************
 * Driver version
 ************************************************************************/
static const char ixgbe_driver_version[] = "4.0.1-k";

/************************************************************************
 * 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 const pci_vendor_info_t ixgbe_vendor_info_array[] =
{
	PVID(IXGBE_INTEL_VENDOR_ID, IXGBE_DEV_ID_82598AF_DUAL_PORT,
    "Intel(R) 82598EB AF (Dual Fiber)"),
	PVID(IXGBE_INTEL_VENDOR_ID, IXGBE_DEV_ID_82598AF_SINGLE_PORT,
    "Intel(R) 82598EB AF (Fiber)"),
	PVID(IXGBE_INTEL_VENDOR_ID, IXGBE_DEV_ID_82598EB_CX4,
    "Intel(R) 82598EB AT (CX4)"),
	PVID(IXGBE_INTEL_VENDOR_ID, IXGBE_DEV_ID_82598AT,
    "Intel(R) 82598EB AT"),
	PVID(IXGBE_INTEL_VENDOR_ID, IXGBE_DEV_ID_82598AT2,
    "Intel(R) 82598EB AT2"),
	PVID(IXGBE_INTEL_VENDOR_ID, IXGBE_DEV_ID_82598, "Intel(R) 82598"),
	PVID(IXGBE_INTEL_VENDOR_ID, IXGBE_DEV_ID_82598_DA_DUAL_PORT,
    "Intel(R) 82598EB AF DA (Dual Fiber)"),
	PVID(IXGBE_INTEL_VENDOR_ID, IXGBE_DEV_ID_82598_CX4_DUAL_PORT,
    "Intel(R) 82598EB AT (Dual CX4)"),
	PVID(IXGBE_INTEL_VENDOR_ID, IXGBE_DEV_ID_82598EB_XF_LR,
    "Intel(R) 82598EB AF (Dual Fiber LR)"),
	PVID(IXGBE_INTEL_VENDOR_ID, IXGBE_DEV_ID_82598_SR_DUAL_PORT_EM,
    "Intel(R) 82598EB AF (Dual Fiber SR)"),
	PVID(IXGBE_INTEL_VENDOR_ID, IXGBE_DEV_ID_82598EB_SFP_LOM,
    "Intel(R) 82598EB LOM"),
	PVID(IXGBE_INTEL_VENDOR_ID, IXGBE_DEV_ID_82599_KX4,
    "Intel(R) X520 82599 (KX4)"),
	PVID(IXGBE_INTEL_VENDOR_ID, IXGBE_DEV_ID_82599_KX4_MEZZ,
    "Intel(R) X520 82599 (KX4 Mezzanine)"),
	PVID(IXGBE_INTEL_VENDOR_ID, IXGBE_DEV_ID_82599_SFP,
    "Intel(R) X520 82599ES (SFI/SFP+)"),
	PVID(IXGBE_INTEL_VENDOR_ID, IXGBE_DEV_ID_82599_XAUI_LOM,
    "Intel(R) X520 82599 (XAUI/BX4)"),
	PVID(IXGBE_INTEL_VENDOR_ID, IXGBE_DEV_ID_82599_CX4,
    "Intel(R) X520 82599 (Dual CX4)"),
	PVID(IXGBE_INTEL_VENDOR_ID, IXGBE_DEV_ID_82599_T3_LOM,
    "Intel(R) X520-T 82599 LOM"),
	PVID(IXGBE_INTEL_VENDOR_ID, IXGBE_DEV_ID_82599_LS,
    "Intel(R) X520 82599 LS"),
	PVID(IXGBE_INTEL_VENDOR_ID, IXGBE_DEV_ID_82599_COMBO_BACKPLANE,
    "Intel(R) X520 82599 (Combined Backplane)"),
	PVID(IXGBE_INTEL_VENDOR_ID, IXGBE_DEV_ID_82599_BACKPLANE_FCOE,
    "Intel(R) X520 82599 (Backplane w/FCoE)"),
	PVID(IXGBE_INTEL_VENDOR_ID, IXGBE_DEV_ID_82599_SFP_SF2,
    "Intel(R) X520 82599 (Dual SFP+)"),
	PVID(IXGBE_INTEL_VENDOR_ID, IXGBE_DEV_ID_82599_SFP_FCOE,
    "Intel(R) X520 82599 (Dual SFP+ w/FCoE)"),
	PVID(IXGBE_INTEL_VENDOR_ID, IXGBE_DEV_ID_82599EN_SFP,
    "Intel(R) X520-1 82599EN (SFP+)"),
	PVID(IXGBE_INTEL_VENDOR_ID, IXGBE_DEV_ID_82599_SFP_SF_QP,
    "Intel(R) X520-4 82599 (Quad SFP+)"),
	PVID(IXGBE_INTEL_VENDOR_ID, IXGBE_DEV_ID_82599_QSFP_SF_QP,
    "Intel(R) X520-Q1 82599 (QSFP+)"),
	PVID(IXGBE_INTEL_VENDOR_ID, IXGBE_DEV_ID_X540T,
    "Intel(R) X540-AT2"),
	PVID(IXGBE_INTEL_VENDOR_ID, IXGBE_DEV_ID_X540T1,  "Intel(R) X540-T1"),
	PVID(IXGBE_INTEL_VENDOR_ID, IXGBE_DEV_ID_X550T,  "Intel(R) X550-T2"),
	PVID(IXGBE_INTEL_VENDOR_ID, IXGBE_DEV_ID_X550T1, "Intel(R) X550-T1"),
	PVID(IXGBE_INTEL_VENDOR_ID, IXGBE_DEV_ID_X550EM_X_KR,
    "Intel(R) X552 (KR Backplane)"),
	PVID(IXGBE_INTEL_VENDOR_ID, IXGBE_DEV_ID_X550EM_X_KX4,
    "Intel(R) X552 (KX4 Backplane)"),
	PVID(IXGBE_INTEL_VENDOR_ID, IXGBE_DEV_ID_X550EM_X_10G_T,
    "Intel(R) X552/X557-AT (10GBASE-T)"),
	PVID(IXGBE_INTEL_VENDOR_ID, IXGBE_DEV_ID_X550EM_X_1G_T,
    "Intel(R) X552 (1000BASE-T)"),
	PVID(IXGBE_INTEL_VENDOR_ID, IXGBE_DEV_ID_X550EM_X_SFP,
    "Intel(R) X552 (SFP+)"),
	PVID(IXGBE_INTEL_VENDOR_ID, IXGBE_DEV_ID_X550EM_A_KR,
    "Intel(R) X553 (KR Backplane)"),
	PVID(IXGBE_INTEL_VENDOR_ID, IXGBE_DEV_ID_X550EM_A_KR_L,
    "Intel(R) X553 L (KR Backplane)"),
	PVID(IXGBE_INTEL_VENDOR_ID, IXGBE_DEV_ID_X550EM_A_SFP,
    "Intel(R) X553 (SFP+)"),
	PVID(IXGBE_INTEL_VENDOR_ID, IXGBE_DEV_ID_X550EM_A_SFP_N,
    "Intel(R) X553 N (SFP+)"),
	PVID(IXGBE_INTEL_VENDOR_ID, IXGBE_DEV_ID_X550EM_A_SGMII,
    "Intel(R) X553 (1GbE SGMII)"),
	PVID(IXGBE_INTEL_VENDOR_ID, IXGBE_DEV_ID_X550EM_A_SGMII_L,
    "Intel(R) X553 L (1GbE SGMII)"),
	PVID(IXGBE_INTEL_VENDOR_ID, IXGBE_DEV_ID_X550EM_A_10G_T,
    "Intel(R) X553/X557-AT (10GBASE-T)"),
	PVID(IXGBE_INTEL_VENDOR_ID, IXGBE_DEV_ID_X550EM_A_1G_T,
    "Intel(R) X553 (1GbE)"),
	PVID(IXGBE_INTEL_VENDOR_ID, IXGBE_DEV_ID_X550EM_A_1G_T_L,
    "Intel(R) X553 L (1GbE)"),
	PVID(IXGBE_INTEL_VENDOR_ID, IXGBE_DEV_ID_X540_BYPASS,
    "Intel(R) X540-T2 (Bypass)"),
	PVID(IXGBE_INTEL_VENDOR_ID, IXGBE_DEV_ID_82599_BYPASS,
    "Intel(R) X520 82599 (Bypass)"),
	/* required last entry */
	PVID_END
};

static void *ixgbe_register(device_t);
static int  ixgbe_if_attach_pre(if_ctx_t);
static int  ixgbe_if_attach_post(if_ctx_t);
static int  ixgbe_if_detach(if_ctx_t);
static int  ixgbe_if_shutdown(if_ctx_t);
static int  ixgbe_if_suspend(if_ctx_t);
static int  ixgbe_if_resume(if_ctx_t);

static void ixgbe_if_stop(if_ctx_t);
void ixgbe_if_enable_intr(if_ctx_t);
static void ixgbe_if_disable_intr(if_ctx_t);
static void ixgbe_link_intr_enable(if_ctx_t);
static int  ixgbe_if_rx_queue_intr_enable(if_ctx_t, uint16_t);
static void ixgbe_if_media_status(if_ctx_t, struct ifmediareq *);
static int  ixgbe_if_media_change(if_ctx_t);
static int  ixgbe_if_msix_intr_assign(if_ctx_t, int);
static int  ixgbe_if_mtu_set(if_ctx_t, uint32_t);
static void ixgbe_if_crcstrip_set(if_ctx_t, int, int);
static void ixgbe_if_multi_set(if_ctx_t);
static int  ixgbe_if_promisc_set(if_ctx_t, int);
static int  ixgbe_if_tx_queues_alloc(if_ctx_t, caddr_t *, uint64_t *, int,
    int);
static int  ixgbe_if_rx_queues_alloc(if_ctx_t, caddr_t *, uint64_t *, int,
   int);
static void ixgbe_if_queues_free(if_ctx_t);
static void ixgbe_if_timer(if_ctx_t, uint16_t);
static void ixgbe_if_update_admin_status(if_ctx_t);
static void ixgbe_if_vlan_register(if_ctx_t, u16);
static void ixgbe_if_vlan_unregister(if_ctx_t, u16);
static int  ixgbe_if_i2c_req(if_ctx_t, struct ifi2creq *);
static bool ixgbe_if_needs_restart(if_ctx_t, enum iflib_restart_event);
int ixgbe_intr(void *);

/************************************************************************
 * Function prototypes
 ************************************************************************/
static uint64_t ixgbe_if_get_counter(if_ctx_t, ift_counter);

static void ixgbe_enable_queue(struct ixgbe_softc *, u32);
static void ixgbe_disable_queue(struct ixgbe_softc *, u32);
static void ixgbe_add_device_sysctls(if_ctx_t);
static int  ixgbe_allocate_pci_resources(if_ctx_t);
static int  ixgbe_setup_low_power_mode(if_ctx_t);

static void ixgbe_config_dmac(struct ixgbe_softc *);
static void ixgbe_configure_ivars(struct ixgbe_softc *);
static void ixgbe_set_ivar(struct ixgbe_softc *, u8, u8, s8);
static u8   *ixgbe_mc_array_itr(struct ixgbe_hw *, u8 **, u32 *);
static bool ixgbe_sfp_probe(if_ctx_t);

static void ixgbe_free_pci_resources(if_ctx_t);

static int  ixgbe_msix_link(void *);
static int  ixgbe_msix_que(void *);
static void ixgbe_initialize_rss_mapping(struct ixgbe_softc *);
static void ixgbe_initialize_receive_units(if_ctx_t);
static void ixgbe_initialize_transmit_units(if_ctx_t);

static int  ixgbe_setup_interface(if_ctx_t);
static void ixgbe_init_device_features(struct ixgbe_softc *);
static void ixgbe_check_fan_failure(struct ixgbe_softc *, u32, bool);
static void ixgbe_sbuf_fw_version(struct ixgbe_hw *, struct sbuf *);
static void ixgbe_print_fw_version(if_ctx_t);
static void ixgbe_add_media_types(if_ctx_t);
static void ixgbe_update_stats_counters(struct ixgbe_softc *);
static void ixgbe_config_link(if_ctx_t);
static void ixgbe_get_slot_info(struct ixgbe_softc *);
static void ixgbe_fw_mode_timer(void *);
static void ixgbe_check_wol_support(struct ixgbe_softc *);
static void ixgbe_enable_rx_drop(struct ixgbe_softc *);
static void ixgbe_disable_rx_drop(struct ixgbe_softc *);

static void ixgbe_add_hw_stats(struct ixgbe_softc *);
static int  ixgbe_set_flowcntl(struct ixgbe_softc *, int);
static int  ixgbe_set_advertise(struct ixgbe_softc *, int);
static int  ixgbe_get_default_advertise(struct ixgbe_softc *);
static void ixgbe_setup_vlan_hw_support(if_ctx_t);
static void ixgbe_config_gpie(struct ixgbe_softc *);
static void ixgbe_config_delay_values(struct ixgbe_softc *);

/* Sysctl handlers */
static int  ixgbe_sysctl_flowcntl(SYSCTL_HANDLER_ARGS);
static int  ixgbe_sysctl_advertise(SYSCTL_HANDLER_ARGS);
static int  ixgbe_sysctl_interrupt_rate_handler(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_print_fw_version(SYSCTL_HANDLER_ARGS);
#ifdef IXGBE_DEBUG
static int  ixgbe_sysctl_power_state(SYSCTL_HANDLER_ARGS);
static int  ixgbe_sysctl_print_rss_config(SYSCTL_HANDLER_ARGS);
#endif
static int  ixgbe_sysctl_rdh_handler(SYSCTL_HANDLER_ARGS);
static int  ixgbe_sysctl_rdt_handler(SYSCTL_HANDLER_ARGS);
static int  ixgbe_sysctl_tdt_handler(SYSCTL_HANDLER_ARGS);
static int  ixgbe_sysctl_tdh_handler(SYSCTL_HANDLER_ARGS);
static int  ixgbe_sysctl_eee_state(SYSCTL_HANDLER_ARGS);
static int  ixgbe_sysctl_wol_enable(SYSCTL_HANDLER_ARGS);
static int  ixgbe_sysctl_wufc(SYSCTL_HANDLER_ARGS);
static int  ixgbe_sysctl_tso_tcp_flags_mask(SYSCTL_HANDLER_ARGS);

/* Deferred interrupt tasklets */
static void ixgbe_handle_msf(void *);
static void ixgbe_handle_mod(void *);
static void ixgbe_handle_phy(void *);

/************************************************************************
 *  FreeBSD Device Interface Entry Points
 ************************************************************************/
static device_method_t ix_methods[] = {
	/* Device interface */
	DEVMETHOD(device_register, ixgbe_register),
	DEVMETHOD(device_probe, iflib_device_probe),
	DEVMETHOD(device_attach, iflib_device_attach),
	DEVMETHOD(device_detach, iflib_device_detach),
	DEVMETHOD(device_shutdown, iflib_device_shutdown),
	DEVMETHOD(device_suspend, iflib_device_suspend),
	DEVMETHOD(device_resume, iflib_device_resume),
#ifdef PCI_IOV
	DEVMETHOD(pci_iov_init, iflib_device_iov_init),
	DEVMETHOD(pci_iov_uninit, iflib_device_iov_uninit),
	DEVMETHOD(pci_iov_add_vf, iflib_device_iov_add_vf),
#endif /* PCI_IOV */
	DEVMETHOD_END
};

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

DRIVER_MODULE(ix, pci, ix_driver, 0, 0);
IFLIB_PNP_INFO(pci, ix_driver, ixgbe_vendor_info_array);
MODULE_DEPEND(ix, pci, 1, 1, 1);
MODULE_DEPEND(ix, ether, 1, 1, 1);
MODULE_DEPEND(ix, iflib, 1, 1, 1);

static device_method_t ixgbe_if_methods[] = {
	DEVMETHOD(ifdi_attach_pre, ixgbe_if_attach_pre),
	DEVMETHOD(ifdi_attach_post, ixgbe_if_attach_post),
	DEVMETHOD(ifdi_detach, ixgbe_if_detach),
	DEVMETHOD(ifdi_shutdown, ixgbe_if_shutdown),
	DEVMETHOD(ifdi_suspend, ixgbe_if_suspend),
	DEVMETHOD(ifdi_resume, ixgbe_if_resume),
	DEVMETHOD(ifdi_init, ixgbe_if_init),
	DEVMETHOD(ifdi_stop, ixgbe_if_stop),
	DEVMETHOD(ifdi_msix_intr_assign, ixgbe_if_msix_intr_assign),
	DEVMETHOD(ifdi_intr_enable, ixgbe_if_enable_intr),
	DEVMETHOD(ifdi_intr_disable, ixgbe_if_disable_intr),
	DEVMETHOD(ifdi_link_intr_enable, ixgbe_link_intr_enable),
	DEVMETHOD(ifdi_tx_queue_intr_enable, ixgbe_if_rx_queue_intr_enable),
	DEVMETHOD(ifdi_rx_queue_intr_enable, ixgbe_if_rx_queue_intr_enable),
	DEVMETHOD(ifdi_tx_queues_alloc, ixgbe_if_tx_queues_alloc),
	DEVMETHOD(ifdi_rx_queues_alloc, ixgbe_if_rx_queues_alloc),
	DEVMETHOD(ifdi_queues_free, ixgbe_if_queues_free),
	DEVMETHOD(ifdi_update_admin_status, ixgbe_if_update_admin_status),
	DEVMETHOD(ifdi_multi_set, ixgbe_if_multi_set),
	DEVMETHOD(ifdi_mtu_set, ixgbe_if_mtu_set),
	DEVMETHOD(ifdi_crcstrip_set, ixgbe_if_crcstrip_set),
	DEVMETHOD(ifdi_media_status, ixgbe_if_media_status),
	DEVMETHOD(ifdi_media_change, ixgbe_if_media_change),
	DEVMETHOD(ifdi_promisc_set, ixgbe_if_promisc_set),
	DEVMETHOD(ifdi_timer, ixgbe_if_timer),
	DEVMETHOD(ifdi_vlan_register, ixgbe_if_vlan_register),
	DEVMETHOD(ifdi_vlan_unregister, ixgbe_if_vlan_unregister),
	DEVMETHOD(ifdi_get_counter, ixgbe_if_get_counter),
	DEVMETHOD(ifdi_i2c_req, ixgbe_if_i2c_req),
	DEVMETHOD(ifdi_needs_restart, ixgbe_if_needs_restart),
#ifdef PCI_IOV
	DEVMETHOD(ifdi_iov_init, ixgbe_if_iov_init),
	DEVMETHOD(ifdi_iov_uninit, ixgbe_if_iov_uninit),
	DEVMETHOD(ifdi_iov_vf_add, ixgbe_if_iov_vf_add),
#endif /* PCI_IOV */
	DEVMETHOD_END
};

/*
 * TUNEABLE PARAMETERS:
 */

static SYSCTL_NODE(_hw, OID_AUTO, ix, CTLFLAG_RD | CTLFLAG_MPSAFE, 0,
    "IXGBE driver parameters");
static driver_t ixgbe_if_driver = {
  "ixgbe_if", ixgbe_if_methods, sizeof(struct ixgbe_softc)
};

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");

/* Flow control setting, default to full */
static int ixgbe_flow_control = ixgbe_fc_full;
SYSCTL_INT(_hw_ix, OID_AUTO, flow_control, CTLFLAG_RDTUN,
    &ixgbe_flow_control, 0, "Default flow control used for all adapters");

/* Advertise Speed, default to 0 (auto) */
static int ixgbe_advertise_speed = 0;
SYSCTL_INT(_hw_ix, OID_AUTO, advertise_speed, CTLFLAG_RDTUN,
    &ixgbe_advertise_speed, 0, "Default advertised speed for all adapters");

/*
 * 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;

/*
 * MSI-X 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");

/*
 * 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;
SYSCTL_INT(_hw_ix, OID_AUTO, unsupported_sfp, CTLFLAG_RDTUN,
    &allow_unsupported_sfp, 0,
    "Allow unsupported SFP modules...use at your own risk");

/*
 * Not sure if Flow Director is fully baked,
 * so we'll default to turning it off.
 */
static int ixgbe_enable_fdir = 0;
SYSCTL_INT(_hw_ix, OID_AUTO, enable_fdir, CTLFLAG_RDTUN, &ixgbe_enable_fdir,
    0,
    "Enable Flow Director");

/* Receive-Side Scaling */
static int ixgbe_enable_rss = 1;
SYSCTL_INT(_hw_ix, OID_AUTO, enable_rss, CTLFLAG_RDTUN, &ixgbe_enable_rss,
    0,
    "Enable Receive-Side Scaling (RSS)");

/*
 * 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 = false;
SYSCTL_INT(_hw_ix, OID_AUTO, enable_aim, CTLFLAG_RWTUN, &ixgbe_enable_aim,
    0,
    "Enable adaptive interrupt moderation");

#if 0
/* Keep running tab on them for sanity check */
static int ixgbe_total_ports;
#endif

MALLOC_DEFINE(M_IXGBE, "ix", "ix driver allocations");

/*
 * For Flow Director: this is the number of TX packets we sample
 * for the filter pool, this means every 20th packet will be probed.
 *
 * This feature can be disabled by setting this to 0.
 */
static int atr_sample_rate = 20;

extern struct if_txrx ixgbe_txrx;

static struct if_shared_ctx ixgbe_sctx_init = {
	.isc_magic = IFLIB_MAGIC,
	.isc_q_align = PAGE_SIZE,/* max(DBA_ALIGN, PAGE_SIZE) */
	.isc_tx_maxsize = IXGBE_TSO_SIZE + sizeof(struct ether_vlan_header),
	.isc_tx_maxsegsize = PAGE_SIZE,
	.isc_tso_maxsize = IXGBE_TSO_SIZE + sizeof(struct ether_vlan_header),
	.isc_tso_maxsegsize = PAGE_SIZE,
	.isc_rx_maxsize = PAGE_SIZE*4,
	.isc_rx_nsegments = 1,
	.isc_rx_maxsegsize = PAGE_SIZE*4,
	.isc_nfl = 1,
	.isc_ntxqs = 1,
	.isc_nrxqs = 1,

	.isc_admin_intrcnt = 1,
	.isc_vendor_info = ixgbe_vendor_info_array,
	.isc_driver_version = ixgbe_driver_version,
	.isc_driver = &ixgbe_if_driver,
	.isc_flags = IFLIB_TSO_INIT_IP,

	.isc_nrxd_min = {MIN_RXD},
	.isc_ntxd_min = {MIN_TXD},
	.isc_nrxd_max = {MAX_RXD},
	.isc_ntxd_max = {MAX_TXD},
	.isc_nrxd_default = {DEFAULT_RXD},
	.isc_ntxd_default = {DEFAULT_TXD},
};

/************************************************************************
 * ixgbe_if_tx_queues_alloc
 ************************************************************************/
static int
ixgbe_if_tx_queues_alloc(if_ctx_t ctx, caddr_t *vaddrs, uint64_t *paddrs,
    int ntxqs, int ntxqsets)
{
	struct ixgbe_softc *sc = iflib_get_softc(ctx);
	if_softc_ctx_t scctx = sc->shared;
	struct ix_tx_queue *que;
	int i, j, error;

	MPASS(sc->num_tx_queues > 0);
	MPASS(sc->num_tx_queues == ntxqsets);
	MPASS(ntxqs == 1);

	/* Allocate queue structure memory */
	sc->tx_queues =
	    (struct ix_tx_queue *)malloc(sizeof(struct ix_tx_queue) *
	    ntxqsets, M_IXGBE, M_NOWAIT | M_ZERO);
	if (!sc->tx_queues) {
		device_printf(iflib_get_dev(ctx),
		    "Unable to allocate TX ring memory\n");
		return (ENOMEM);
	}

	for (i = 0, que = sc->tx_queues; i < ntxqsets; i++, que++) {
		struct tx_ring *txr = &que->txr;

		/* In case SR-IOV is enabled, align the index properly */
		txr->me = ixgbe_vf_que_index(sc->iov_mode, sc->pool, i);

		txr->sc = que->sc = sc;

		/* Allocate report status array */
		txr->tx_rsq = (qidx_t *)malloc(sizeof(qidx_t) *
		    scctx->isc_ntxd[0], M_IXGBE, M_NOWAIT | M_ZERO);
		if (txr->tx_rsq == NULL) {
			error = ENOMEM;
			goto fail;
		}
		for (j = 0; j < scctx->isc_ntxd[0]; j++)
			txr->tx_rsq[j] = QIDX_INVALID;
		/* get virtual and physical address of the hardware queues */
		txr->tail = IXGBE_TDT(txr->me);
		txr->tx_base = (union ixgbe_adv_tx_desc *)vaddrs[i];
		txr->tx_paddr = paddrs[i];

		txr->bytes = 0;
		txr->total_packets = 0;

		/* Set the rate at which we sample packets */
		if (sc->feat_en & IXGBE_FEATURE_FDIR)
			txr->atr_sample = atr_sample_rate;

	}

	device_printf(iflib_get_dev(ctx), "allocated for %d queues\n",
	    sc->num_tx_queues);

	return (0);

fail:
	ixgbe_if_queues_free(ctx);

	return (error);
} /* ixgbe_if_tx_queues_alloc */

/************************************************************************
 * ixgbe_if_rx_queues_alloc
 ************************************************************************/
static int
ixgbe_if_rx_queues_alloc(if_ctx_t ctx, caddr_t *vaddrs, uint64_t *paddrs,
    int nrxqs, int nrxqsets)
{
	struct ixgbe_softc *sc = iflib_get_softc(ctx);
	struct ix_rx_queue *que;
	int i;

	MPASS(sc->num_rx_queues > 0);
	MPASS(sc->num_rx_queues == nrxqsets);
	MPASS(nrxqs == 1);

	/* Allocate queue structure memory */
	sc->rx_queues =
	    (struct ix_rx_queue *)malloc(sizeof(struct ix_rx_queue)*nrxqsets,
	    M_IXGBE, M_NOWAIT | M_ZERO);
	if (!sc->rx_queues) {
		device_printf(iflib_get_dev(ctx),
		    "Unable to allocate TX ring memory\n");
		return (ENOMEM);
	}

	for (i = 0, que = sc->rx_queues; i < nrxqsets; i++, que++) {
		struct rx_ring *rxr = &que->rxr;

		/* In case SR-IOV is enabled, align the index properly */
		rxr->me = ixgbe_vf_que_index(sc->iov_mode, sc->pool, i);

		rxr->sc = que->sc = sc;

		/* get the virtual and physical address of the hw queues */
		rxr->tail = IXGBE_RDT(rxr->me);
		rxr->rx_base = (union ixgbe_adv_rx_desc *)vaddrs[i];
		rxr->rx_paddr = paddrs[i];
		rxr->bytes = 0;
		rxr->que = que;
	}

	device_printf(iflib_get_dev(ctx), "allocated for %d rx queues\n",
	    sc->num_rx_queues);

	return (0);
} /* ixgbe_if_rx_queues_alloc */

/************************************************************************
 * ixgbe_if_queues_free
 ************************************************************************/
static void
ixgbe_if_queues_free(if_ctx_t ctx)
{
	struct ixgbe_softc *sc = iflib_get_softc(ctx);
	struct ix_tx_queue *tx_que = sc->tx_queues;
	struct ix_rx_queue *rx_que = sc->rx_queues;
	int i;

	if (tx_que != NULL) {
		for (i = 0; i < sc->num_tx_queues; i++, tx_que++) {
			struct tx_ring *txr = &tx_que->txr;
			if (txr->tx_rsq == NULL)
				break;

			free(txr->tx_rsq, M_IXGBE);
			txr->tx_rsq = NULL;
		}

		free(sc->tx_queues, M_IXGBE);
		sc->tx_queues = NULL;
	}
	if (rx_que != NULL) {
		free(sc->rx_queues, M_IXGBE);
		sc->rx_queues = NULL;
	}
} /* ixgbe_if_queues_free */

/************************************************************************
 * ixgbe_initialize_rss_mapping
 ************************************************************************/
static void
ixgbe_initialize_rss_mapping(struct ixgbe_softc *sc)
{
	struct ixgbe_hw *hw = &sc->hw;
	u32 reta = 0, mrqc, rss_key[10];
	int queue_id, table_size, index_mult;
	int i, j;
	u32 rss_hash_config;

	if (sc->feat_en & IXGBE_FEATURE_RSS) {
		/* Fetch the configured RSS key */
		rss_getkey((uint8_t *)&rss_key);
	} else {
		/* set up random bits */
		arc4rand(&rss_key, sizeof(rss_key), 0);
	}

	/* Set multiplier for RETA setup and table size based on MAC */
	index_mult = 0x1;
	table_size = 128;
	switch (sc->hw.mac.type) {
	case ixgbe_mac_82598EB:
		index_mult = 0x11;
		break;
	case ixgbe_mac_X550:
	case ixgbe_mac_X550EM_x:
	case ixgbe_mac_X550EM_a:
		table_size = 512;
		break;
	default:
		break;
	}

	/* Set up the redirection table */
	for (i = 0, j = 0; i < table_size; i++, j++) {
		if (j == sc->num_rx_queues)
			j = 0;

		if (sc->feat_en & IXGBE_FEATURE_RSS) {
			/*
			 * Fetch the RSS bucket id for the given indirection
			 * entry. Cap it at the number of configured buckets
			 * (which is num_rx_queues.)
			 */
			queue_id = rss_get_indirection_to_bucket(i);
			queue_id = queue_id % sc->num_rx_queues;
		} else
			queue_id = (j * index_mult);

		/*
		 * 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 (i = 0; i < 10; i++)
		IXGBE_WRITE_REG(hw, IXGBE_RSSRK(i), rss_key[i]);

	/* Perform hash on these packet types */
	if (sc->feat_en & IXGBE_FEATURE_RSS)
		rss_hash_config = rss_gethashconfig();
	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.
		 */
		rss_hash_config = RSS_HASHTYPE_RSS_IPV4 |
		    RSS_HASHTYPE_RSS_TCP_IPV4 |
		    RSS_HASHTYPE_RSS_IPV6 |
		    RSS_HASHTYPE_RSS_TCP_IPV6 |
		    RSS_HASHTYPE_RSS_IPV6_EX |
		    RSS_HASHTYPE_RSS_TCP_IPV6_EX;
	}

	mrqc = IXGBE_MRQC_RSSEN;
	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_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;
	mrqc |= ixgbe_get_mrqc(sc->iov_mode);
	IXGBE_WRITE_REG(hw, IXGBE_MRQC, mrqc);
} /* ixgbe_initialize_rss_mapping */

/************************************************************************
 * ixgbe_initialize_receive_units - Setup receive registers and features.
 ************************************************************************/
#define BSIZEPKT_ROUNDUP ((1<<IXGBE_SRRCTL_BSIZEPKT_SHIFT)-1)

static void
ixgbe_initialize_receive_units(if_ctx_t ctx)
{
	struct ixgbe_softc *sc = iflib_get_softc(ctx);
	if_softc_ctx_t scctx = sc->shared;
	struct ixgbe_hw *hw = &sc->hw;
	if_t ifp = iflib_get_ifp(ctx);
	struct ix_rx_queue *que;
	int i, j;
	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 (sc->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 (if_getmtu(ifp) > ETHERMTU)
		hlreg |= IXGBE_HLREG0_JUMBOEN;
	else
		hlreg &= ~IXGBE_HLREG0_JUMBOEN;
	IXGBE_WRITE_REG(hw, IXGBE_HLREG0, hlreg);

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

	/* Setup the Base and Length of the Rx Descriptor Ring */
	for (i = 0, que = sc->rx_queues; i < sc->num_rx_queues; i++, que++) {
		struct rx_ring *rxr = &que->rxr;
		u64 rdba = rxr->rx_paddr;

		j = rxr->me;

		/* Setup the Base and Length of the Rx Descriptor Ring */
		IXGBE_WRITE_REG(hw, IXGBE_RDBAL(j),
		    (rdba & 0x00000000ffffffffULL));
		IXGBE_WRITE_REG(hw, IXGBE_RDBAH(j), (rdba >> 32));
		IXGBE_WRITE_REG(hw, IXGBE_RDLEN(j),
		     scctx->isc_nrxd[0] * sizeof(union ixgbe_adv_rx_desc));

		/* Set up the SRRCTL register */
		srrctl = IXGBE_READ_REG(hw, IXGBE_SRRCTL(j));
		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 (sc->num_rx_queues > 1 &&
		    sc->hw.fc.requested_mode == ixgbe_fc_none) {
			srrctl |= IXGBE_SRRCTL_DROP_EN;
		} else {
			srrctl &= ~IXGBE_SRRCTL_DROP_EN;
		}

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

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

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

	if (sc->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_initialize_rss_mapping(sc);

	if (sc->feat_en & IXGBE_FEATURE_RSS) {
		/* RSS and RX IPP Checksum are mutually exclusive */
		rxcsum |= IXGBE_RXCSUM_PCSD;
	}

	if (if_getcapenable(ifp) & IFCAP_RXCSUM)
		rxcsum |= IXGBE_RXCSUM_PCSD;

	/* This is useful for calculating UDP/IP fragment checksums */
	if (!(rxcsum & IXGBE_RXCSUM_PCSD))
		rxcsum |= IXGBE_RXCSUM_IPPCSE;

	IXGBE_WRITE_REG(hw, IXGBE_RXCSUM, rxcsum);

} /* ixgbe_initialize_receive_units */

/************************************************************************
 * ixgbe_initialize_transmit_units - Enable transmit units.
 ************************************************************************/
static void
ixgbe_initialize_transmit_units(if_ctx_t ctx)
{
	struct ixgbe_softc *sc = iflib_get_softc(ctx);
	struct ixgbe_hw *hw = &sc->hw;
	if_softc_ctx_t scctx = sc->shared;
	struct ix_tx_queue *que;
	int i;

	/* Setup the Base and Length of the Tx Descriptor Ring */
	for (i = 0, que = sc->tx_queues; i < sc->num_tx_queues;
	    i++, que++) {
		struct tx_ring	   *txr = &que->txr;
		u64 tdba = txr->tx_paddr;
		u32 txctrl = 0;
		int j = txr->me;

		IXGBE_WRITE_REG(hw, IXGBE_TDBAL(j),
		    (tdba & 0x00000000ffffffffULL));
		IXGBE_WRITE_REG(hw, IXGBE_TDBAH(j), (tdba >> 32));
		IXGBE_WRITE_REG(hw, IXGBE_TDLEN(j),
		    scctx->isc_ntxd[0] * sizeof(union ixgbe_adv_tx_desc));

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

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

		txr->tx_rs_cidx = txr->tx_rs_pidx;
		txr->tx_cidx_processed = scctx->isc_ntxd[0] - 1;
		for (int k = 0; k < scctx->isc_ntxd[0]; k++)
			txr->tx_rsq[k] = QIDX_INVALID;

		/* Disable Head Writeback */
		/*
		 * Note: for X550 series devices, these registers are actually
		 * prefixed with TPH_ isntead of DCA_, but the addresses and
		 * fields remain the same.
		 */
		switch (hw->mac.type) {
		case ixgbe_mac_82598EB:
			txctrl = IXGBE_READ_REG(hw, IXGBE_DCA_TXCTRL(j));
			break;
		default:
			txctrl =
			    IXGBE_READ_REG(hw, IXGBE_DCA_TXCTRL_82599(j));
			break;
		}
		txctrl &= ~IXGBE_DCA_TXCTRL_DESC_WRO_EN;
		switch (hw->mac.type) {
		case ixgbe_mac_82598EB:
			IXGBE_WRITE_REG(hw, IXGBE_DCA_TXCTRL(j), txctrl);
			break;
		default:
			IXGBE_WRITE_REG(hw, IXGBE_DCA_TXCTRL_82599(j),
			    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_get_mtqc(sc->iov_mode));
		rttdcs &= ~IXGBE_RTTDCS_ARBDIS;
		IXGBE_WRITE_REG(hw, IXGBE_RTTDCS, rttdcs);
	}

} /* ixgbe_initialize_transmit_units */

/************************************************************************
 * ixgbe_register
 ************************************************************************/
static void *
ixgbe_register(device_t dev)
{
	return (&ixgbe_sctx_init);
} /* ixgbe_register */

/************************************************************************
 * ixgbe_if_attach_pre - Device initialization routine, part 1
 *
 *   Called when the driver is being loaded.
 *   Identifies the type of hardware, initializes the hardware,
 *   and initializes iflib structures.
 *
 *   return 0 on success, positive on failure
 ************************************************************************/
static int
ixgbe_if_attach_pre(if_ctx_t ctx)
{
	struct ixgbe_softc *sc;
	device_t dev;
	if_softc_ctx_t scctx;
	struct ixgbe_hw *hw;
	int error = 0;
	u32 ctrl_ext;
	size_t i;

	INIT_DEBUGOUT("ixgbe_attach: begin");

	/* Allocate, clear, and link in our adapter structure */
	dev = iflib_get_dev(ctx);
	sc = iflib_get_softc(ctx);
	sc->hw.back = sc;
	sc->ctx = ctx;
	sc->dev = dev;
	scctx = sc->shared = iflib_get_softc_ctx(ctx);
	sc->media = iflib_get_media(ctx);
	hw = &sc->hw;

	/* Determine hardware revision */
	hw->vendor_id = pci_get_vendor(dev);
	hw->device_id = pci_get_device(dev);
	hw->revision_id = pci_get_revid(dev);
	hw->subsystem_vendor_id = pci_get_subvendor(dev);
	hw->subsystem_device_id = pci_get_subdevice(dev);

	/* Do base PCI setup - map BAR0 */
	if (ixgbe_allocate_pci_resources(ctx)) {
		device_printf(dev, "Allocation of PCI resources failed\n");
		return (ENXIO);
	}

	/* 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);

	/*
	 * Initialize the shared code
	 */
	if (ixgbe_init_shared_code(hw) != 0) {
		device_printf(dev, "Unable to initialize the shared code\n");
		error = ENXIO;
		goto err_pci;
	}

	if (hw->mac.ops.fw_recovery_mode &&
	    hw->mac.ops.fw_recovery_mode(hw)) {
		device_printf(dev,
		    "Firmware recovery mode detected. Limiting "
		    "functionality.\nRefer to the Intel(R) Ethernet Adapters "
		    "and Devices User Guide for details on firmware recovery "
		    "mode.");
		error = ENOSYS;
		goto err_pci;
	}

	/* 82598 Does not support SR-IOV, initialize everything else */
	if (hw->mac.type >= ixgbe_mac_82599_vf) {
		for (i = 0; i < sc->num_vfs; i++)
			hw->mbx.ops[i].init_params(hw);
	}

	hw->allow_unsupported_sfp = allow_unsupported_sfp;

	if (hw->mac.type != ixgbe_mac_82598EB)
		hw->phy.smart_speed = ixgbe_smart_speed;

	ixgbe_init_device_features(sc);

	/* Enable WoL (if supported) */
	ixgbe_check_wol_support(sc);

	/* Verify adapter fan is still functional (if applicable) */
	if (sc->feat_en & IXGBE_FEATURE_FAN_FAIL) {
		u32 esdp = IXGBE_READ_REG(hw, IXGBE_ESDP);
		ixgbe_check_fan_failure(sc, esdp, false);
	}

	/* Ensure SW/FW semaphore is free */
	ixgbe_init_swfw_semaphore(hw);

	/* Set an initial default flow control value */
	hw->fc.requested_mode = ixgbe_flow_control;

	hw->phy.reset_if_overtemp = true;
	error = ixgbe_reset_hw(hw);
	hw->phy.reset_if_overtemp = false;
	if (error == IXGBE_ERR_SFP_NOT_PRESENT) {
		/*
		 * No optics in this port, set up
		 * so the timer routine will probe
		 * for later insertion.
		 */
		sc->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_pci;
	} else if (error) {
		device_printf(dev, "Hardware initialization failed\n");
		error = EIO;
		goto err_pci;
	}

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

	error = ixgbe_start_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.\nIf 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_pci;
	case IXGBE_ERR_SFP_NOT_PRESENT:
		device_printf(dev, "No SFP+ Module found\n");
		/* falls thru */
	default:
		break;
	}

	/* Most of the iflib initialization... */

	iflib_set_mac(ctx, hw->mac.addr);
	switch (sc->hw.mac.type) {
	case ixgbe_mac_X550:
	case ixgbe_mac_X550EM_x:
	case ixgbe_mac_X550EM_a:
		scctx->isc_rss_table_size = 512;
		scctx->isc_ntxqsets_max = scctx->isc_nrxqsets_max = 64;
		break;
	default:
		scctx->isc_rss_table_size = 128;
		scctx->isc_ntxqsets_max = scctx->isc_nrxqsets_max = 16;
	}

	/* Allow legacy interrupts */
	ixgbe_txrx.ift_legacy_intr = ixgbe_intr;

	scctx->isc_txqsizes[0] =
	    roundup2(scctx->isc_ntxd[0] * sizeof(union ixgbe_adv_tx_desc) +
	    sizeof(u32), DBA_ALIGN),
	scctx->isc_rxqsizes[0] =
	    roundup2(scctx->isc_nrxd[0] * sizeof(union ixgbe_adv_rx_desc),
	    DBA_ALIGN);

	/* XXX */
	scctx->isc_tx_csum_flags = CSUM_IP | CSUM_TCP | CSUM_UDP | CSUM_TSO |
	    CSUM_IP6_TCP | CSUM_IP6_UDP | CSUM_IP6_TSO;
	if (sc->hw.mac.type == ixgbe_mac_82598EB) {
		scctx->isc_tx_nsegments = IXGBE_82598_SCATTER;
	} else {
		scctx->isc_tx_csum_flags |= CSUM_SCTP |CSUM_IP6_SCTP;
		scctx->isc_tx_nsegments = IXGBE_82599_SCATTER;
	}

	scctx->isc_msix_bar = pci_msix_table_bar(dev);

	scctx->isc_tx_tso_segments_max = scctx->isc_tx_nsegments;
	scctx->isc_tx_tso_size_max = IXGBE_TSO_SIZE;
	scctx->isc_tx_tso_segsize_max = PAGE_SIZE;

	scctx->isc_txrx = &ixgbe_txrx;

	scctx->isc_capabilities = scctx->isc_capenable = IXGBE_CAPS;

	return (0);

err_pci:
	ctrl_ext = IXGBE_READ_REG(&sc->hw, IXGBE_CTRL_EXT);
	ctrl_ext &= ~IXGBE_CTRL_EXT_DRV_LOAD;
	IXGBE_WRITE_REG(&sc->hw, IXGBE_CTRL_EXT, ctrl_ext);
	ixgbe_free_pci_resources(ctx);

	return (error);
} /* ixgbe_if_attach_pre */

 /*********************************************************************
 * ixgbe_if_attach_post - Device initialization routine, part 2
 *
 *   Called during driver load, but after interrupts and
 *   resources have been allocated and configured.
 *   Sets up some data structures not relevant to iflib.
 *
 *   return 0 on success, positive on failure
 *********************************************************************/
static int
ixgbe_if_attach_post(if_ctx_t ctx)
{
	device_t dev;
	struct ixgbe_softc *sc;
	struct ixgbe_hw *hw;
	int error = 0;

	dev = iflib_get_dev(ctx);
	sc = iflib_get_softc(ctx);
	hw = &sc->hw;

	if (sc->intr_type == IFLIB_INTR_LEGACY &&
		(sc->feat_cap & IXGBE_FEATURE_LEGACY_IRQ) == 0) {
		device_printf(dev, "Device does not support legacy interrupts");
		error = ENXIO;
		goto err;
	}

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

	/* hw.ix defaults init */
	ixgbe_set_advertise(sc, ixgbe_advertise_speed);

	/* Enable the optics for 82599 SFP+ fiber */
	ixgbe_enable_tx_laser(hw);

	/* Enable power to the phy. */
	ixgbe_set_phy_power(hw, true);

	ixgbe_initialize_iov(sc);

	error = ixgbe_setup_interface(ctx);
	if (error) {
		device_printf(dev, "Interface setup failed: %d\n", error);
		goto err;
	}

	ixgbe_if_update_admin_status(ctx);

	/* Initialize statistics */
	ixgbe_update_stats_counters(sc);
	ixgbe_add_hw_stats(sc);

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

	/*
	 * Do time init and sysctl init here, but
	 * only on the first port of a bypass sc.
	 */
	ixgbe_bypass_init(sc);

	/* Display NVM and Option ROM versions */
	ixgbe_print_fw_version(ctx);

	/* Set an initial dmac value */
	sc->dmac = 0;
	/* Set initial advertised speeds (if applicable) */
	sc->advertise = ixgbe_get_default_advertise(sc);

	if (sc->feat_cap & IXGBE_FEATURE_SRIOV)
		ixgbe_define_iov_schemas(dev, &error);

	/* Add sysctls */
	ixgbe_add_device_sysctls(ctx);

	/* Init recovery mode timer and state variable */
	if (sc->feat_en & IXGBE_FEATURE_RECOVERY_MODE) {
		sc->recovery_mode = 0;

		/* Set up the timer callout */
		callout_init(&sc->fw_mode_timer, true);

		/* Start the task */
		callout_reset(&sc->fw_mode_timer, hz, ixgbe_fw_mode_timer, sc);
	}

	return (0);
err:
	return (error);
} /* ixgbe_if_attach_post */

/************************************************************************
 * ixgbe_check_wol_support
 *
 *   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 ixgbe_softc *sc)
{
	struct ixgbe_hw *hw = &sc->hw;
	u16 dev_caps = 0;

	/* Find out WoL support for port */
	sc->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))
		sc->wol_support = hw->wol_enabled = 1;

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

	return;
} /* ixgbe_check_wol_support */

/************************************************************************
 * ixgbe_setup_interface
 *
 *   Setup networking device structure and register an interface.
 ************************************************************************/
static int
ixgbe_setup_interface(if_ctx_t ctx)
{
	if_t ifp = iflib_get_ifp(ctx);
	struct ixgbe_softc *sc = iflib_get_softc(ctx);

	INIT_DEBUGOUT("ixgbe_setup_interface: begin");

	if_setbaudrate(ifp, IF_Gbps(10));

	sc->max_frame_size = if_getmtu(ifp) + ETHER_HDR_LEN + ETHER_CRC_LEN;

	sc->phy_layer = ixgbe_get_supported_physical_layer(&sc->hw);

	ixgbe_add_media_types(ctx);

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

	return (0);
} /* ixgbe_setup_interface */

/************************************************************************
 * ixgbe_if_get_counter
 ************************************************************************/
static uint64_t
ixgbe_if_get_counter(if_ctx_t ctx, ift_counter cnt)
{
	struct ixgbe_softc *sc = iflib_get_softc(ctx);
	if_t ifp = iflib_get_ifp(ctx);

	switch (cnt) {
	case IFCOUNTER_IPACKETS:
		return (sc->ipackets);
	case IFCOUNTER_OPACKETS:
		return (sc->opackets);
	case IFCOUNTER_IBYTES:
		return (sc->ibytes);
	case IFCOUNTER_OBYTES:
		return (sc->obytes);
	case IFCOUNTER_IMCASTS:
		return (sc->imcasts);
	case IFCOUNTER_OMCASTS:
		return (sc->omcasts);
	case IFCOUNTER_COLLISIONS:
		return (0);
	case IFCOUNTER_IQDROPS:
		return (sc->iqdrops);
	case IFCOUNTER_OQDROPS:
		return (0);
	case IFCOUNTER_IERRORS:
		return (sc->ierrors);
	default:
		return (if_get_counter_default(ifp, cnt));
	}
} /* ixgbe_if_get_counter */

/************************************************************************
 * ixgbe_if_i2c_req
 ************************************************************************/
static int
ixgbe_if_i2c_req(if_ctx_t ctx, struct ifi2creq *req)
{
	struct ixgbe_softc *sc = iflib_get_softc(ctx);
	struct ixgbe_hw *hw = &sc->hw;
	int i;

	if (hw->phy.ops.read_i2c_byte == NULL)
		return (ENXIO);
	for (i = 0; i < req->len; i++)
		hw->phy.ops.read_i2c_byte(hw, req->offset + i,
		    req->dev_addr, &req->data[i]);
	return (0);
} /* ixgbe_if_i2c_req */

/* ixgbe_if_needs_restart - Tell iflib when the driver needs to be
 * reinitialized
 * @ctx: iflib context
 * @event: event code to check
 *
 * Defaults to returning false for unknown events.
 *
 * @returns true if iflib needs to reinit the interface
 */
static bool
ixgbe_if_needs_restart(if_ctx_t ctx __unused, enum iflib_restart_event event)
{
	switch (event) {
	case IFLIB_RESTART_VLAN_CONFIG:
	default:
		return (false);
	}
}

/************************************************************************
 * ixgbe_add_media_types
 ************************************************************************/
static void
ixgbe_add_media_types(if_ctx_t ctx)
{
	struct ixgbe_softc *sc = iflib_get_softc(ctx);
	struct ixgbe_hw *hw = &sc->hw;
	device_t dev = iflib_get_dev(ctx);
	u64 layer;

	layer = sc->phy_layer = ixgbe_get_supported_physical_layer(hw);

	/* Media types with matching FreeBSD media defines */
	if (layer & IXGBE_PHYSICAL_LAYER_10GBASE_T)
		ifmedia_add(sc->media, IFM_ETHER | IFM_10G_T, 0, NULL);
	if (layer & IXGBE_PHYSICAL_LAYER_1000BASE_T)
		ifmedia_add(sc->media, IFM_ETHER | IFM_1000_T, 0, NULL);
	if (layer & IXGBE_PHYSICAL_LAYER_100BASE_TX)
		ifmedia_add(sc->media, IFM_ETHER | IFM_100_TX, 0, NULL);
	if (layer & IXGBE_PHYSICAL_LAYER_10BASE_T)
		ifmedia_add(sc->media, IFM_ETHER | IFM_10_T, 0, NULL);

	if (hw->mac.type == ixgbe_mac_X550) {
		ifmedia_add(sc->media, IFM_ETHER | IFM_2500_T, 0, NULL);
		ifmedia_add(sc->media, IFM_ETHER | IFM_5000_T, 0, NULL);
	}

	if (layer & IXGBE_PHYSICAL_LAYER_SFP_PLUS_CU ||
	    layer & IXGBE_PHYSICAL_LAYER_SFP_ACTIVE_DA) {
		ifmedia_add(sc->media, IFM_ETHER | IFM_10G_TWINAX, 0,
		    NULL);
		ifmedia_add(sc->media, IFM_ETHER | IFM_1000_KX, 0, NULL);
	}

	if (layer & IXGBE_PHYSICAL_LAYER_10GBASE_LR) {
		ifmedia_add(sc->media, IFM_ETHER | IFM_10G_LR, 0, NULL);
		if (hw->phy.multispeed_fiber)
			ifmedia_add(sc->media, IFM_ETHER | IFM_1000_LX, 0,
			    NULL);
	}
	if (layer & IXGBE_PHYSICAL_LAYER_10GBASE_SR) {
		ifmedia_add(sc->media, IFM_ETHER | IFM_10G_SR, 0, NULL);
		if (hw->phy.multispeed_fiber)
			ifmedia_add(sc->media, IFM_ETHER | IFM_1000_SX, 0,
			    NULL);
	} else if (layer & IXGBE_PHYSICAL_LAYER_1000BASE_SX)
		ifmedia_add(sc->media, IFM_ETHER | IFM_1000_SX, 0, NULL);
	if (layer & IXGBE_PHYSICAL_LAYER_10GBASE_CX4)
		ifmedia_add(sc->media, IFM_ETHER | IFM_10G_CX4, 0, NULL);

#ifdef IFM_ETH_XTYPE
	if (layer & IXGBE_PHYSICAL_LAYER_10GBASE_KR)
		ifmedia_add(sc->media, IFM_ETHER | IFM_10G_KR, 0, NULL);
	if (layer & IXGBE_PHYSICAL_LAYER_10GBASE_KX4)
		ifmedia_add( sc->media, IFM_ETHER | IFM_10G_KX4, 0, NULL);
	if (layer & IXGBE_PHYSICAL_LAYER_1000BASE_KX)
		ifmedia_add(sc->media, IFM_ETHER | IFM_1000_KX, 0, NULL);
	if (layer & IXGBE_PHYSICAL_LAYER_2500BASE_KX)
		ifmedia_add(sc->media, IFM_ETHER | IFM_2500_KX, 0, NULL);
#else
	if (layer & IXGBE_PHYSICAL_LAYER_10GBASE_KR) {
		device_printf(dev, "Media supported: 10GbaseKR\n");
		device_printf(dev, "10GbaseKR mapped to 10GbaseSR\n");
		ifmedia_add(sc->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(sc->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(sc->media, IFM_ETHER | IFM_1000_CX, 0, NULL);
	}
	if (layer & IXGBE_PHYSICAL_LAYER_2500BASE_KX) {
		device_printf(dev, "Media supported: 2500baseKX\n");
		device_printf(dev, "2500baseKX mapped to 2500baseSX\n");
		ifmedia_add(sc->media, IFM_ETHER | IFM_2500_SX, 0, NULL);
	}
#endif
	if (layer & IXGBE_PHYSICAL_LAYER_1000BASE_BX) {
		device_printf(dev, "Media supported: 1000baseBX\n");
		ifmedia_add(sc->media, IFM_ETHER | IFM_1000_BX, 0, NULL);
	}

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

	ifmedia_add(sc->media, IFM_ETHER | IFM_AUTO, 0, NULL);
} /* ixgbe_add_media_types */

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

/************************************************************************
 * ixgbe_config_link
 ************************************************************************/
static void
ixgbe_config_link(if_ctx_t ctx)
{
	struct ixgbe_softc *sc = iflib_get_softc(ctx);
	struct ixgbe_hw *hw = &sc->hw;
	u32 autoneg, err = 0;
	bool sfp, negotiate;

	sfp = ixgbe_is_sfp(hw);

	if (sfp) {
		sc->task_requests |= IXGBE_REQUEST_TASK_MOD;
		iflib_admin_intr_deferred(ctx);
	} else {
		if (hw->mac.ops.check_link)
			err = ixgbe_check_link(hw, &sc->link_speed,
			    &sc->link_up, false);
		if (err)
			return;
		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)
			return;

		if (hw->mac.type == ixgbe_mac_X550 &&
		    hw->phy.autoneg_advertised == 0) {
			/*
			 * 2.5G and 5G autonegotiation speeds on X550
			 * are disabled by default due to reported
			 * interoperability issues with some switches.
			 *
			 * The second condition checks if any operations
			 * involving setting autonegotiation speeds have
			 * been performed prior to this ixgbe_config_link()
			 * call.
			 *
			 * If hw->phy.autoneg_advertised does not
			 * equal 0, this means that the user might have
			 * set autonegotiation speeds via the sysctl
			 * before bringing the interface up. In this
			 * case, we should not disable 2.5G and 5G
			 * since that speeds might be selected by the
			 * user.
			 *
			 * Otherwise (i.e. if hw->phy.autoneg_advertised
			 * is set to 0), it is the first time we set
			 * autonegotiation preferences and the default
			 * set of speeds should exclude 2.5G and 5G.
			 */
			autoneg &= ~(IXGBE_LINK_SPEED_2_5GB_FULL |
			    IXGBE_LINK_SPEED_5GB_FULL);
		}

		if (hw->mac.ops.setup_link)
			err = hw->mac.ops.setup_link(hw, autoneg,
			    sc->link_up);
	}
} /* ixgbe_config_link */

/************************************************************************
 * ixgbe_update_stats_counters - Update board statistics counters.
 ************************************************************************/
static void
ixgbe_update_stats_counters(struct ixgbe_softc *sc)
{
	struct ixgbe_hw *hw = &sc->hw;
	struct ixgbe_hw_stats *stats = &sc->stats.pf;
	u32 missed_rx = 0, bprc, lxon, lxoff, total;
	u32 lxoffrxc;
	u64 total_missed_rx = 0;

	stats->crcerrs += IXGBE_READ_REG(hw, IXGBE_CRCERRS);
	stats->illerrc += IXGBE_READ_REG(hw, IXGBE_ILLERRC);
	stats->errbc += IXGBE_READ_REG(hw, IXGBE_ERRBC);
	stats->mspdc += IXGBE_READ_REG(hw, IXGBE_MSPDC);
	stats->mpc[0] += IXGBE_READ_REG(hw, IXGBE_MPC(0));

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

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

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

	/*
	 * For watchdog management we need to know if we have been paused
	 * during the last interval, so capture that here.
	*/
	if (lxoffrxc)
		sc->shared->isc_pause_frames = 1;

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

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

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

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

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

	/* Fill out the OS statistics structure */
	IXGBE_SET_IPACKETS(sc, stats->gprc);
	IXGBE_SET_OPACKETS(sc, stats->gptc);
	IXGBE_SET_IBYTES(sc, stats->gorc);
	IXGBE_SET_OBYTES(sc, stats->gotc);
	IXGBE_SET_IMCASTS(sc, stats->mprc);
	IXGBE_SET_OMCASTS(sc, stats->mptc);
	IXGBE_SET_COLLISIONS(sc, 0);
	IXGBE_SET_IQDROPS(sc, total_missed_rx);

	/*
	 * Aggregate following types of errors as RX errors:
	 * - CRC error count,
	 * - illegal byte error count,
	 * - missed packets count,
	 * - length error count,
	 * - undersized packets count,
	 * - fragmented packets count,
	 * - oversized packets count,
	 * - jabber count.
	 */
	IXGBE_SET_IERRORS(sc, stats->crcerrs + stats->illerrc +
	    stats->mpc[0] + stats->rlec + stats->ruc + stats->rfc +
	    stats->roc + stats->rjc);
} /* ixgbe_update_stats_counters */

/************************************************************************
 * ixgbe_add_hw_stats
 *
 *   Add sysctl variables, one per statistic, to the system.
 ************************************************************************/
static void
ixgbe_add_hw_stats(struct ixgbe_softc *sc)
{
	device_t dev = iflib_get_dev(sc->ctx);
	struct ix_rx_queue *rx_que;
	struct ix_tx_queue *tx_que;
	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 = &sc->stats.pf;
	struct sysctl_oid *stat_node, *queue_node;
	struct sysctl_oid_list *stat_list, *queue_list;
	int i;

#define QUEUE_NAME_LEN 32
	char namebuf[QUEUE_NAME_LEN];

	/* Driver Statistics */
	SYSCTL_ADD_ULONG(ctx, child, OID_AUTO, "dropped",
	    CTLFLAG_RD, &sc->dropped_pkts, "Driver dropped packets");
	SYSCTL_ADD_ULONG(ctx, child, OID_AUTO, "watchdog_events",
	    CTLFLAG_RD, &sc->watchdog_events, "Watchdog timeouts");
	SYSCTL_ADD_ULONG(ctx, child, OID_AUTO, "link_irq",
	    CTLFLAG_RD, &sc->link_irq, "Link MSI-X IRQ Handled");

	for (i = 0, tx_que = sc->tx_queues; i < sc->num_tx_queues;
	    i++, tx_que++) {
		struct tx_ring *txr = &tx_que->txr;
		snprintf(namebuf, QUEUE_NAME_LEN, "queue%d", i);
		queue_node = SYSCTL_ADD_NODE(ctx, child, OID_AUTO, namebuf,
		    CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, "Queue Name");
		queue_list = SYSCTL_CHILDREN(queue_node);

		SYSCTL_ADD_PROC(ctx, queue_list, OID_AUTO, "txd_head",
		    CTLTYPE_UINT | CTLFLAG_RD, txr, 0,
		    ixgbe_sysctl_tdh_handler, "IU",
		    "Transmit Descriptor Head");
		SYSCTL_ADD_PROC(ctx, queue_list, OID_AUTO, "txd_tail",
		    CTLTYPE_UINT | CTLFLAG_RD, txr, 0,
		    ixgbe_sysctl_tdt_handler, "IU",
		    "Transmit Descriptor Tail");
		SYSCTL_ADD_UQUAD(ctx, queue_list, OID_AUTO, "tso_tx",
		    CTLFLAG_RD, &txr->tso_tx, "TSO");
		SYSCTL_ADD_UQUAD(ctx, queue_list, OID_AUTO, "tx_packets",
		    CTLFLAG_RD, &txr->total_packets,
		    "Queue Packets Transmitted");
	}

	for (i = 0, rx_que = sc->rx_queues; i < sc->num_rx_queues;
	    i++, rx_que++) {
		struct rx_ring *rxr = &rx_que->rxr;
		snprintf(namebuf, QUEUE_NAME_LEN, "queue%d", i);
		queue_node = SYSCTL_ADD_NODE(ctx, child, OID_AUTO, namebuf,
		    CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, "Queue Name");
		queue_list = SYSCTL_CHILDREN(queue_node);

		SYSCTL_ADD_PROC(ctx, queue_list, OID_AUTO, "interrupt_rate",
		    CTLTYPE_UINT | CTLFLAG_RW,
		    &sc->rx_queues[i], 0,
		    ixgbe_sysctl_interrupt_rate_handler, "IU",
		    "Interrupt Rate");
		SYSCTL_ADD_UQUAD(ctx, queue_list, OID_AUTO, "irqs",
		    CTLFLAG_RD, &(sc->rx_queues[i].irqs),
		    "irqs on this queue");
		SYSCTL_ADD_PROC(ctx, queue_list, OID_AUTO, "rxd_head",
		    CTLTYPE_UINT | CTLFLAG_RD, rxr, 0,
		    ixgbe_sysctl_rdh_handler, "IU",
		    "Receive Descriptor Head");
		SYSCTL_ADD_PROC(ctx, queue_list, OID_AUTO, "rxd_tail",
		    CTLTYPE_UINT | CTLFLAG_RD, rxr, 0,
		    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_UQUAD(ctx, queue_list, OID_AUTO, "rx_discarded",
		    CTLFLAG_RD, &rxr->rx_discarded, "Discarded RX packets");
	}

	/* MAC stats get their own sub node */
	stat_node = SYSCTL_ADD_NODE(ctx, child, OID_AUTO, "mac_stats",
	    CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, "MAC Statistics");
	stat_list = SYSCTL_CHILDREN(stat_node);

	SYSCTL_ADD_UQUAD(ctx, stat_list, OID_AUTO, "rx_errs",
	    CTLFLAG_RD, &sc->ierrors, IXGBE_SYSCTL_DESC_RX_ERRS);
	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");
	SYSCTL_ADD_UQUAD(ctx, stat_list, OID_AUTO, "rx_missed_packets",
	    CTLFLAG_RD, &stats->mpc[0], "RX Missed Packet Count");

	/* 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");
} /* ixgbe_add_hw_stats */

/************************************************************************
 * ixgbe_sysctl_tdh_handler - Transmit Descriptor Head handler function
 *
 *   Retrieves the TDH value from the hardware
 ************************************************************************/
static int
ixgbe_sysctl_tdh_handler(SYSCTL_HANDLER_ARGS)
{
	struct tx_ring *txr = ((struct tx_ring *)oidp->oid_arg1);
	int error;
	unsigned int val;

	if (!txr)
		return (0);


	if (atomic_load_acq_int(&txr->sc->recovery_mode))
		return (EPERM);

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

	return (0);
} /* ixgbe_sysctl_tdh_handler */

/************************************************************************
 * ixgbe_sysctl_tdt_handler - Transmit Descriptor Tail handler function
 *
 *   Retrieves the TDT value from the hardware
 ************************************************************************/
static int
ixgbe_sysctl_tdt_handler(SYSCTL_HANDLER_ARGS)
{
	struct tx_ring *txr = ((struct tx_ring *)oidp->oid_arg1);
	int error;
	unsigned int val;

	if (!txr)
		return (0);

	if (atomic_load_acq_int(&txr->sc->recovery_mode))
		return (EPERM);

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

	return (0);
} /* ixgbe_sysctl_tdt_handler */

/************************************************************************
 * ixgbe_sysctl_rdh_handler - Receive Descriptor Head handler function
 *
 *   Retrieves the RDH value from the hardware
 ************************************************************************/
static int
ixgbe_sysctl_rdh_handler(SYSCTL_HANDLER_ARGS)
{
	struct rx_ring *rxr = ((struct rx_ring *)oidp->oid_arg1);
	int error;
	unsigned int val;

	if (!rxr)
		return (0);

	if (atomic_load_acq_int(&rxr->sc->recovery_mode))
		return (EPERM);

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

	return (0);
} /* ixgbe_sysctl_rdh_handler */

/************************************************************************
 * ixgbe_sysctl_rdt_handler - Receive Descriptor Tail handler function
 *
 *   Retrieves the RDT value from the hardware
 ************************************************************************/
static int
ixgbe_sysctl_rdt_handler(SYSCTL_HANDLER_ARGS)
{
	struct rx_ring *rxr = ((struct rx_ring *)oidp->oid_arg1);
	int error;
	unsigned int val;

	if (!rxr)
		return (0);

	if (atomic_load_acq_int(&rxr->sc->recovery_mode))
		return (EPERM);

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

	return (0);
} /* ixgbe_sysctl_rdt_handler */

/************************************************************************
 * ixgbe_if_vlan_register
 *
 *   Run via 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_if_vlan_register(if_ctx_t ctx, u16 vtag)
{
	struct ixgbe_softc *sc = iflib_get_softc(ctx);
	u16 index, bit;

	index = (vtag >> 5) & 0x7F;
	bit = vtag & 0x1F;
	sc->shadow_vfta[index] |= (1 << bit);
	++sc->num_vlans;
	ixgbe_setup_vlan_hw_support(ctx);
} /* ixgbe_if_vlan_register */

/************************************************************************
 * ixgbe_if_vlan_unregister
 *
 *   Run via vlan unconfig EVENT, remove our entry in the soft vfta.
 ************************************************************************/
static void
ixgbe_if_vlan_unregister(if_ctx_t ctx, u16 vtag)
{
	struct ixgbe_softc *sc = iflib_get_softc(ctx);
	u16 index, bit;

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

/************************************************************************
 * ixgbe_setup_vlan_hw_support
 ************************************************************************/
static void
ixgbe_setup_vlan_hw_support(if_ctx_t ctx)
{
	if_t ifp = iflib_get_ifp(ctx);
	struct ixgbe_softc *sc = iflib_get_softc(ctx);
	struct ixgbe_hw *hw = &sc->hw;
	struct rx_ring *rxr;
	int i;
	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 (sc->num_vlans == 0 ||
	    (if_getcapenable(ifp) & IFCAP_VLAN_HWTAGGING) == 0) {
		/* Clear the vlan hw flag */
		for (i = 0; i < sc->num_rx_queues; i++) {
			rxr = &sc->rx_queues[i].rxr;
			/* On 82599 the VLAN enable is per/queue in RXDCTL */
			if (hw->mac.type != ixgbe_mac_82598EB) {
				ctrl = IXGBE_READ_REG(hw,
				    IXGBE_RXDCTL(rxr->me));
				ctrl &= ~IXGBE_RXDCTL_VME;
				IXGBE_WRITE_REG(hw, IXGBE_RXDCTL(rxr->me),
				    ctrl);
			}
			rxr->vtag_strip = false;
		}
		ctrl = IXGBE_READ_REG(hw, IXGBE_VLNCTRL);
		/* Enable the Filter Table if enabled */
		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);
		return;
	}

	/* Setup the queues for vlans */
	if (if_getcapenable(ifp) & IFCAP_VLAN_HWTAGGING) {
		for (i = 0; i < sc->num_rx_queues; i++) {
			rxr = &sc->rx_queues[i].rxr;
			/* On 82599 the VLAN enable is per/queue in RXDCTL */
			if (hw->mac.type != ixgbe_mac_82598EB) {
				ctrl = IXGBE_READ_REG(hw,
				    IXGBE_RXDCTL(rxr->me));
				ctrl |= IXGBE_RXDCTL_VME;
				IXGBE_WRITE_REG(hw, IXGBE_RXDCTL(rxr->me),
				    ctrl);
			}
			rxr->vtag_strip = true;
		}
	}

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

	ctrl = IXGBE_READ_REG(hw, IXGBE_VLNCTRL);
	/* Enable the Filter Table if enabled */
	if (if_getcapenable(ifp) & 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);
} /* ixgbe_setup_vlan_hw_support */

/************************************************************************
 * ixgbe_get_slot_info
 *
 *   Get the width and transaction speed of
 *   the slot this adapter is plugged into.
 ************************************************************************/
static void
ixgbe_get_slot_info(struct ixgbe_softc *sc)
{
	device_t dev = iflib_get_dev(sc->ctx);
	struct ixgbe_hw *hw = &sc->hw;
	int bus_info_valid = true;
	u32 offset;
	u16 link;

	/* Some devices are behind an internal bridge */
	switch (hw->device_id) {
	case IXGBE_DEV_ID_82599_SFP_SF_QP:
	case IXGBE_DEV_ID_82599_QSFP_SF_QP:
		goto get_parent_info;
	default:
		break;
	}

	ixgbe_get_bus_info(hw);

	/*
	 * Some devices don't use PCI-E, but there is no need
	 * to display "Unknown" for bus speed and width.
	 */
	switch (hw->mac.type) {
	case ixgbe_mac_X550EM_x:
	case ixgbe_mac_X550EM_a:
		return;
	default:
		goto display;
	}

get_parent_info:
	/*
	 * 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 */
	if (pci_find_cap(dev, PCIY_EXPRESS, &offset)) {
		/*
		 * Hmm...can't get PCI-Express capabilities.
		 * Falling back to default method.
		 */
		bus_info_valid = false;
		ixgbe_get_bus_info(hw);
		goto display;
	}
	/* ...and read the Link Status Register */
	link = pci_read_config(dev, offset + PCIER_LINK_STA, 2);
	ixgbe_set_pci_config_data_generic(hw, link);

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 (bus_info_valid) {
		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"
			    " 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"
			    " is not sufficient for optimal performance.\n");
			device_printf(dev,
			    "For optimal performance a x8 PCIE Gen3 slot is"
			    " required.\n");
		}
	} else
		device_printf(dev,
		    "Unable to determine slot speed/width. The speed/width"
		    " reported are that of the internal switch.\n");

	return;
} /* ixgbe_get_slot_info */

/************************************************************************
 * ixgbe_if_msix_intr_assign
 *
 *   Setup MSI-X Interrupt resources and handlers
 ************************************************************************/
static int
ixgbe_if_msix_intr_assign(if_ctx_t ctx, int msix)
{
	struct ixgbe_softc *sc = iflib_get_softc(ctx);
	struct ix_rx_queue *rx_que = sc->rx_queues;
	struct ix_tx_queue *tx_que;
	int error, rid, vector = 0;
	char buf[16];

	/* Admin Que is vector 0*/
	rid = vector + 1;
	for (int i = 0; i < sc->num_rx_queues; i++, vector++, rx_que++) {
		rid = vector + 1;

		snprintf(buf, sizeof(buf), "rxq%d", i);
		error = iflib_irq_alloc_generic(ctx, &rx_que->que_irq, rid,
		    IFLIB_INTR_RXTX, ixgbe_msix_que, rx_que, rx_que->rxr.me,
		    buf);

		if (error) {
			device_printf(iflib_get_dev(ctx),
			    "Failed to allocate que int %d err: %d",
			    i,error);
			sc->num_rx_queues = i + 1;
			goto fail;
		}

		rx_que->msix = vector;
	}
	for (int i = 0; i < sc->num_tx_queues; i++) {
		snprintf(buf, sizeof(buf), "txq%d", i);
		tx_que = &sc->tx_queues[i];
		tx_que->msix = i % sc->num_rx_queues;
		iflib_softirq_alloc_generic(ctx,
		    &sc->rx_queues[tx_que->msix].que_irq,
		    IFLIB_INTR_TX, tx_que, tx_que->txr.me, buf);
	}
	rid = vector + 1;
	error = iflib_irq_alloc_generic(ctx, &sc->irq, rid,
	    IFLIB_INTR_ADMIN, ixgbe_msix_link, sc, 0, "aq");
	if (error) {
		device_printf(iflib_get_dev(ctx),
		    "Failed to register admin handler");
		return (error);
	}

	sc->vector = vector;

	return (0);
fail:
	iflib_irq_free(ctx, &sc->irq);
	rx_que = sc->rx_queues;
	for (int i = 0; i < sc->num_rx_queues; i++, rx_que++)
		iflib_irq_free(ctx, &rx_que->que_irq);

	return (error);
} /* ixgbe_if_msix_intr_assign */

static inline void
ixgbe_perform_aim(struct ixgbe_softc *sc, struct ix_rx_queue *que)
{
	uint32_t newitr = 0;
	struct rx_ring *rxr = &que->rxr;
	/* FIXME struct tx_ring *txr = ... ->txr; */

	/*
	 * 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(&sc->hw, IXGBE_EITR(que->msix),
		    que->eitr_setting);
	}

	que->eitr_setting = 0;
	/* Idle, do nothing */
	if (rxr->bytes == 0) {
		/* FIXME && txr->bytes == 0 */
		return;
	}

	if ((rxr->bytes) && (rxr->packets))
		newitr = rxr->bytes / rxr->packets;
	/* FIXME for transmit accounting
	 * 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 (sc->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 */
	/* FIXME txr->bytes = 0; */
	/* FIXME txr->packets = 0; */
	rxr->bytes = 0;
	rxr->packets = 0;

	return;
}

/*********************************************************************
 * ixgbe_msix_que - MSI-X Queue Interrupt Service routine
 **********************************************************************/
static int
ixgbe_msix_que(void *arg)
{
	struct ix_rx_queue *que = arg;
	struct ixgbe_softc *sc = que->sc;
	if_t ifp = iflib_get_ifp(que->sc->ctx);

	/* Protect against spurious interrupts */
	if ((if_getdrvflags(ifp) & IFF_DRV_RUNNING) == 0)
		return (FILTER_HANDLED);

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

	/* Check for AIM */
	if (sc->enable_aim) {
		ixgbe_perform_aim(sc, que);
	}

	return (FILTER_SCHEDULE_THREAD);
} /* ixgbe_msix_que */

/************************************************************************
 * ixgbe_media_status - Media Ioctl callback
 *
 *   Called whenever the user queries the status of
 *   the interface using ifconfig.
 ************************************************************************/
static void
ixgbe_if_media_status(if_ctx_t ctx, struct ifmediareq * ifmr)
{
	struct ixgbe_softc *sc = iflib_get_softc(ctx);
	struct ixgbe_hw *hw = &sc->hw;
	int layer;

	INIT_DEBUGOUT("ixgbe_if_media_status: begin");

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

	if (!sc->link_active)
		return;

	ifmr->ifm_status |= IFM_ACTIVE;
	layer = sc->phy_layer;

	if (layer & IXGBE_PHYSICAL_LAYER_10GBASE_T ||
	    layer & IXGBE_PHYSICAL_LAYER_1000BASE_T ||
	    layer & IXGBE_PHYSICAL_LAYER_100BASE_TX ||
	    layer & IXGBE_PHYSICAL_LAYER_10BASE_T)
		switch (sc->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;
		case IXGBE_LINK_SPEED_10_FULL:
			ifmr->ifm_active |= IFM_10_T | IFM_FDX;
			break;
		}
	if (hw->mac.type == ixgbe_mac_X550)
		switch (sc->link_speed) {
		case IXGBE_LINK_SPEED_5GB_FULL:
			ifmr->ifm_active |= IFM_5000_T | IFM_FDX;
			break;
		case IXGBE_LINK_SPEED_2_5GB_FULL:
			ifmr->ifm_active |= IFM_2500_T | IFM_FDX;
			break;
		}
	if (layer & IXGBE_PHYSICAL_LAYER_SFP_PLUS_CU ||
	    layer & IXGBE_PHYSICAL_LAYER_SFP_ACTIVE_DA)
		switch (sc->link_speed) {
		case IXGBE_LINK_SPEED_10GB_FULL:
			ifmr->ifm_active |= IFM_10G_TWINAX | IFM_FDX;
			break;
		case IXGBE_LINK_SPEED_1GB_FULL:
			ifmr->ifm_active |= IFM_1000_KX | IFM_FDX;
			break;
		}
	if (layer & IXGBE_PHYSICAL_LAYER_10GBASE_LR)
		switch (sc->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 (sc->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 (sc->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 (sc->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.
	 */
#ifndef IFM_ETH_XTYPE
	if (layer & IXGBE_PHYSICAL_LAYER_10GBASE_KR)
		switch (sc->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_2500BASE_KX ||
	    layer & IXGBE_PHYSICAL_LAYER_1000BASE_KX)
		switch (sc->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;
		}
#else
	if (layer & IXGBE_PHYSICAL_LAYER_10GBASE_KR)
		switch (sc->link_speed) {
		case IXGBE_LINK_SPEED_10GB_FULL:
			ifmr->ifm_active |= IFM_10G_KR | IFM_FDX;
			break;
		case IXGBE_LINK_SPEED_2_5GB_FULL:
			ifmr->ifm_active |= IFM_2500_KX | IFM_FDX;
			break;
		case IXGBE_LINK_SPEED_1GB_FULL:
			ifmr->ifm_active |= IFM_1000_KX | IFM_FDX;
			break;
		}
	else if (layer & IXGBE_PHYSICAL_LAYER_10GBASE_KX4 ||
	    layer & IXGBE_PHYSICAL_LAYER_2500BASE_KX ||
	    layer & IXGBE_PHYSICAL_LAYER_1000BASE_KX)
		switch (sc->link_speed) {
		case IXGBE_LINK_SPEED_10GB_FULL:
			ifmr->ifm_active |= IFM_10G_KX4 | IFM_FDX;
			break;
		case IXGBE_LINK_SPEED_2_5GB_FULL:
			ifmr->ifm_active |= IFM_2500_KX | IFM_FDX;
			break;
		case IXGBE_LINK_SPEED_1GB_FULL:
			ifmr->ifm_active |= IFM_1000_KX | IFM_FDX;
			break;
		}
#endif

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

	/* 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;
} /* ixgbe_media_status */

/************************************************************************
 * ixgbe_media_change - Media Ioctl callback
 *
 *   Called when the user changes speed/duplex using
 *   media/mediopt option with ifconfig.
 ************************************************************************/
static int
ixgbe_if_media_change(if_ctx_t ctx)
{
	struct ixgbe_softc *sc = iflib_get_softc(ctx);
	struct ifmedia *ifm = iflib_get_media(ctx);
	struct ixgbe_hw *hw = &sc->hw;
	ixgbe_link_speed speed = 0;

	INIT_DEBUGOUT("ixgbe_if_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;
		speed |= IXGBE_LINK_SPEED_1GB_FULL;
		speed |= IXGBE_LINK_SPEED_10GB_FULL;
		break;
	case IFM_10G_LRM:
	case IFM_10G_LR:
#ifndef IFM_ETH_XTYPE
	case IFM_10G_SR: /* KR, too */
	case IFM_10G_CX4: /* KX4 */
#else
	case IFM_10G_KR:
	case IFM_10G_KX4:
#endif
		speed |= IXGBE_LINK_SPEED_1GB_FULL;
		speed |= IXGBE_LINK_SPEED_10GB_FULL;
		break;
#ifndef IFM_ETH_XTYPE
	case IFM_1000_CX: /* KX */
#else
	case IFM_1000_KX:
#endif
	case IFM_1000_LX:
	case IFM_1000_SX:
	case IFM_1000_BX:
		speed |= IXGBE_LINK_SPEED_1GB_FULL;
		break;
	case IFM_1000_T:
		speed |= IXGBE_LINK_SPEED_100_FULL;
		speed |= IXGBE_LINK_SPEED_1GB_FULL;
		break;
	case IFM_10G_TWINAX:
		speed |= IXGBE_LINK_SPEED_10GB_FULL;
		break;
	case IFM_5000_T:
		speed |= IXGBE_LINK_SPEED_5GB_FULL;
		break;
	case IFM_2500_T:
		speed |= IXGBE_LINK_SPEED_2_5GB_FULL;
		break;
	case IFM_100_TX:
		speed |= IXGBE_LINK_SPEED_100_FULL;
		break;
	case IFM_10_T:
		speed |= IXGBE_LINK_SPEED_10_FULL;
		break;
	default:
		goto invalid;
	}

	hw->mac.autotry_restart = true;
	hw->mac.ops.setup_link(hw, speed, true);
	sc->advertise =
	    ((speed & IXGBE_LINK_SPEED_10GB_FULL)  ? 0x4  : 0) |
	    ((speed & IXGBE_LINK_SPEED_5GB_FULL)   ? 0x20 : 0) |
	    ((speed & IXGBE_LINK_SPEED_2_5GB_FULL) ? 0x10 : 0) |
	    ((speed & IXGBE_LINK_SPEED_1GB_FULL)   ? 0x2  : 0) |
	    ((speed & IXGBE_LINK_SPEED_100_FULL)   ? 0x1  : 0) |
	    ((speed & IXGBE_LINK_SPEED_10_FULL)    ? 0x8  : 0);

	return (0);

invalid:
	device_printf(iflib_get_dev(ctx), "Invalid media type!\n");

	return (EINVAL);
} /* ixgbe_if_media_change */

/************************************************************************
 * ixgbe_set_promisc
 ************************************************************************/
static int
ixgbe_if_promisc_set(if_ctx_t ctx, int flags)
{
	struct ixgbe_softc *sc = iflib_get_softc(ctx);
	if_t ifp = iflib_get_ifp(ctx);
	u32 rctl;
	int mcnt = 0;

	rctl = IXGBE_READ_REG(&sc->hw, IXGBE_FCTRL);
	rctl &= (~IXGBE_FCTRL_UPE);
	if (if_getflags(ifp) & IFF_ALLMULTI)
		mcnt = MAX_NUM_MULTICAST_ADDRESSES;
	else {
		mcnt = min(if_llmaddr_count(ifp),
		    MAX_NUM_MULTICAST_ADDRESSES);
	}
	if (mcnt < MAX_NUM_MULTICAST_ADDRESSES)
		rctl &= (~IXGBE_FCTRL_MPE);
	IXGBE_WRITE_REG(&sc->hw, IXGBE_FCTRL, rctl);

	if (if_getflags(ifp) & IFF_PROMISC) {
		rctl |= (IXGBE_FCTRL_UPE | IXGBE_FCTRL_MPE);
		IXGBE_WRITE_REG(&sc->hw, IXGBE_FCTRL, rctl);
	} else if (if_getflags(ifp) & IFF_ALLMULTI) {
		rctl |= IXGBE_FCTRL_MPE;
		rctl &= ~IXGBE_FCTRL_UPE;
		IXGBE_WRITE_REG(&sc->hw, IXGBE_FCTRL, rctl);
	}
	return (0);
} /* ixgbe_if_promisc_set */

/************************************************************************
 * ixgbe_msix_link - Link status change ISR (MSI/MSI-X)
 ************************************************************************/
static int
ixgbe_msix_link(void *arg)
{
	struct ixgbe_softc *sc = arg;
	struct ixgbe_hw *hw = &sc->hw;
	u32 eicr, eicr_mask;
	s32 retval;

	++sc->link_irq;

	/* Pause other interrupts */
	IXGBE_WRITE_REG(hw, IXGBE_EIMC, IXGBE_EIMC_OTHER);

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

	/* Link status change */
	if (eicr & IXGBE_EICR_LSC) {
		IXGBE_WRITE_REG(hw, IXGBE_EIMC, IXGBE_EIMC_LSC);
		sc->task_requests |= IXGBE_REQUEST_TASK_LSC;
	}

	if (sc->hw.mac.type != ixgbe_mac_82598EB) {
		if ((sc->feat_en & IXGBE_FEATURE_FDIR) &&
		    (eicr & IXGBE_EICR_FLOW_DIR)) {
			/* This is probably overkill :) */
			if (!atomic_cmpset_int(&sc->fdir_reinit, 0, 1))
				return (FILTER_HANDLED);
			/* Disable the interrupt */
			IXGBE_WRITE_REG(hw, IXGBE_EIMC, IXGBE_EICR_FLOW_DIR);
			sc->task_requests |= IXGBE_REQUEST_TASK_FDIR;
		} else
			if (eicr & IXGBE_EICR_ECC) {
				device_printf(iflib_get_dev(sc->ctx),
				    "Received ECC Err, initiating reset\n");
				hw->mac.flags |=
				    ~IXGBE_FLAGS_DOUBLE_RESET_REQUIRED;
				ixgbe_reset_hw(hw);
				IXGBE_WRITE_REG(hw, IXGBE_EICR,
				    IXGBE_EICR_ECC);
			}

		/* Check for over temp condition */
		if (sc->feat_en & IXGBE_FEATURE_TEMP_SENSOR) {
			switch (sc->hw.mac.type) {
			case ixgbe_mac_X550EM_a:
				if (!(eicr & IXGBE_EICR_GPI_SDP0_X550EM_a))
					break;
				IXGBE_WRITE_REG(hw, IXGBE_EIMC,
				    IXGBE_EICR_GPI_SDP0_X550EM_a);
				IXGBE_WRITE_REG(hw, IXGBE_EICR,
				    IXGBE_EICR_GPI_SDP0_X550EM_a);
				retval = hw->phy.ops.check_overtemp(hw);
				if (retval != IXGBE_ERR_OVERTEMP)
					break;
				device_printf(iflib_get_dev(sc->ctx),
				    "\nCRITICAL: OVER TEMP!!"
				    " PHY IS SHUT DOWN!!\n");
				device_printf(iflib_get_dev(sc->ctx),
				    "System shutdown required!\n");
				break;
			default:
				if (!(eicr & IXGBE_EICR_TS))
					break;
				retval = hw->phy.ops.check_overtemp(hw);
				if (retval != IXGBE_ERR_OVERTEMP)
					break;
				device_printf(iflib_get_dev(sc->ctx),
				    "\nCRITICAL: OVER TEMP!!"
				    " PHY IS SHUT DOWN!!\n");
				device_printf(iflib_get_dev(sc->ctx),
				    "System shutdown required!\n");
				IXGBE_WRITE_REG(hw, IXGBE_EICR,
				    IXGBE_EICR_TS);
				break;
			}
		}

		/* Check for VF message */
		if ((sc->feat_en & IXGBE_FEATURE_SRIOV) &&
		    (eicr & IXGBE_EICR_MAILBOX))
			sc->task_requests |= IXGBE_REQUEST_TASK_MBX;
	}

	if (ixgbe_is_sfp(hw)) {
		/* Pluggable optics-related interrupt */
		if (hw->mac.type >= ixgbe_mac_X540)
			eicr_mask = IXGBE_EICR_GPI_SDP0_X540;
		else
			eicr_mask = IXGBE_EICR_GPI_SDP2_BY_MAC(hw);

		if (eicr & eicr_mask) {
			IXGBE_WRITE_REG(hw, IXGBE_EICR, eicr_mask);
			sc->task_requests |= IXGBE_REQUEST_TASK_MOD;
		}

		if ((hw->mac.type == ixgbe_mac_82599EB) &&
		    (eicr & IXGBE_EICR_GPI_SDP1_BY_MAC(hw))) {
			IXGBE_WRITE_REG(hw, IXGBE_EICR,
			    IXGBE_EICR_GPI_SDP1_BY_MAC(hw));
			sc->task_requests |= IXGBE_REQUEST_TASK_MSF;
		}
	}

	/* Check for fan failure */
	if (sc->feat_en & IXGBE_FEATURE_FAN_FAIL) {
		ixgbe_check_fan_failure(sc, eicr, true);
		IXGBE_WRITE_REG(hw, IXGBE_EICR,
		    IXGBE_EICR_GPI_SDP1_BY_MAC(hw));
	}

	/* External PHY interrupt */
	if ((hw->phy.type == ixgbe_phy_x550em_ext_t) &&
	    (eicr & IXGBE_EICR_GPI_SDP0_X540)) {
		IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_GPI_SDP0_X540);
		sc->task_requests |= IXGBE_REQUEST_TASK_PHY;
	}

	return (sc->task_requests != 0) ?
	    FILTER_SCHEDULE_THREAD : FILTER_HANDLED;
} /* ixgbe_msix_link */

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

	if (atomic_load_acq_int(&que->sc->recovery_mode))
		return (EPERM);

	reg = IXGBE_READ_REG(&que->sc->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->sc->hw, IXGBE_EITR(que->msix), reg);

	return (0);
} /* ixgbe_sysctl_interrupt_rate_handler */

/************************************************************************
 * ixgbe_add_device_sysctls
 ************************************************************************/
static void
ixgbe_add_device_sysctls(if_ctx_t ctx)
{
	struct ixgbe_softc *sc = iflib_get_softc(ctx);
	device_t dev = iflib_get_dev(ctx);
	struct ixgbe_hw *hw = &sc->hw;
	struct sysctl_oid_list *child;
	struct sysctl_ctx_list *ctx_list;

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

	/* Sysctls for all devices */
	SYSCTL_ADD_PROC(ctx_list, child, OID_AUTO, "fc",
	    CTLTYPE_INT | CTLFLAG_RW,
	    sc, 0, ixgbe_sysctl_flowcntl, "I",
	    IXGBE_SYSCTL_DESC_SET_FC);

	SYSCTL_ADD_PROC(ctx_list, child, OID_AUTO, "advertise_speed",
	    CTLTYPE_INT | CTLFLAG_RW,
	    sc, 0, ixgbe_sysctl_advertise, "I",
	    IXGBE_SYSCTL_DESC_ADV_SPEED);

	sc->enable_aim = ixgbe_enable_aim;
	SYSCTL_ADD_INT(ctx_list, child, OID_AUTO, "enable_aim", CTLFLAG_RW,
	    &sc->enable_aim, 0, "Interrupt Moderation");

	SYSCTL_ADD_PROC(ctx_list, child, OID_AUTO, "fw_version",
	    CTLTYPE_STRING | CTLFLAG_RD, sc, 0,
	    ixgbe_sysctl_print_fw_version, "A", "Prints FW/NVM Versions");

	SYSCTL_ADD_PROC(ctx_list, child, OID_AUTO,
	    "tso_tcp_flags_mask_first_segment",
	    CTLTYPE_UINT | CTLFLAG_RW | CTLFLAG_NEEDGIANT,
	    sc, 0, ixgbe_sysctl_tso_tcp_flags_mask, "IU",
	    "TSO TCP flags mask for first segment");

	SYSCTL_ADD_PROC(ctx_list, child, OID_AUTO,
	    "tso_tcp_flags_mask_middle_segment",
	    CTLTYPE_UINT | CTLFLAG_RW | CTLFLAG_NEEDGIANT,
	    sc, 1, ixgbe_sysctl_tso_tcp_flags_mask, "IU",
	    "TSO TCP flags mask for middle segment");

	SYSCTL_ADD_PROC(ctx_list, child, OID_AUTO,
	    "tso_tcp_flags_mask_last_segment",
	    CTLTYPE_UINT | CTLFLAG_RW | CTLFLAG_NEEDGIANT,
	    sc, 2, ixgbe_sysctl_tso_tcp_flags_mask, "IU",
	    "TSO TCP flags mask for last segment");

#ifdef IXGBE_DEBUG
	/* testing sysctls (for all devices) */
	SYSCTL_ADD_PROC(ctx_list, child, OID_AUTO, "power_state",
	    CTLTYPE_INT | CTLFLAG_RW,
	    sc, 0, ixgbe_sysctl_power_state,
	    "I", "PCI Power State");

	SYSCTL_ADD_PROC(ctx_list, child, OID_AUTO, "print_rss_config",
	    CTLTYPE_STRING | CTLFLAG_RD, sc, 0,
	    ixgbe_sysctl_print_rss_config, "A", "Prints RSS Configuration");
#endif
	/* for X550 series devices */
	if (hw->mac.type >= ixgbe_mac_X550)
		SYSCTL_ADD_PROC(ctx_list, child, OID_AUTO, "dmac",
		    CTLTYPE_U16 | CTLFLAG_RW,
		    sc, 0, ixgbe_sysctl_dmac,
		    "I", "DMA Coalesce");

	/* for WoL-capable devices */
	if (hw->device_id == IXGBE_DEV_ID_X550EM_X_10G_T) {
		SYSCTL_ADD_PROC(ctx_list, child, OID_AUTO, "wol_enable",
		    CTLTYPE_INT | CTLFLAG_RW, sc, 0,
		    ixgbe_sysctl_wol_enable, "I",
		    "Enable/Disable Wake on LAN");

		SYSCTL_ADD_PROC(ctx_list, child, OID_AUTO, "wufc",
		    CTLTYPE_U32 | CTLFLAG_RW,
		    sc, 0, ixgbe_sysctl_wufc,
		    "I", "Enable/Disable Wake Up Filters");
	}

	/* for X552/X557-AT 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_list, child, OID_AUTO, "phy",
		    CTLFLAG_RD | CTLFLAG_MPSAFE, NULL,
		    "External PHY sysctls");
		phy_list = SYSCTL_CHILDREN(phy_node);

		SYSCTL_ADD_PROC(ctx_list, phy_list, OID_AUTO, "temp",
		    CTLTYPE_U16 | CTLFLAG_RD,
		    sc, 0, ixgbe_sysctl_phy_temp,
		    "I", "Current External PHY Temperature (Celsius)");

		SYSCTL_ADD_PROC(ctx_list, phy_list, OID_AUTO,
		    "overtemp_occurred",
		    CTLTYPE_U16 | CTLFLAG_RD, sc, 0,
		    ixgbe_sysctl_phy_overtemp_occurred, "I",
		    "External PHY High Temperature Event Occurred");
	}

	if (sc->feat_cap & IXGBE_FEATURE_EEE) {
		SYSCTL_ADD_PROC(ctx_list, child, OID_AUTO, "eee_state",
		    CTLTYPE_INT | CTLFLAG_RW, sc, 0,
		    ixgbe_sysctl_eee_state, "I", "EEE Power Save State");
	}
} /* ixgbe_add_device_sysctls */

/************************************************************************
 * ixgbe_allocate_pci_resources
 ************************************************************************/
static int
ixgbe_allocate_pci_resources(if_ctx_t ctx)
{
	struct ixgbe_softc *sc = iflib_get_softc(ctx);
	device_t dev = iflib_get_dev(ctx);
	int rid;

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

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

	/* Save bus_space values for READ/WRITE_REG macros */
	sc->osdep.mem_bus_space_tag = rman_get_bustag(sc->pci_mem);
	sc->osdep.mem_bus_space_handle =
	    rman_get_bushandle(sc->pci_mem);
	/* Set hw values for shared code */
	sc->hw.hw_addr = (u8 *)&sc->osdep.mem_bus_space_handle;

	return (0);
} /* ixgbe_allocate_pci_resources */

/************************************************************************
 * ixgbe_detach - Device removal routine
 *
 *   Called when the driver is being removed.
 *   Stops the adapter and deallocates all the resources
 *   that were allocated for driver operation.
 *
 *   return 0 on success, positive on failure
 ************************************************************************/
static int
ixgbe_if_detach(if_ctx_t ctx)
{
	struct ixgbe_softc *sc = iflib_get_softc(ctx);
	device_t dev = iflib_get_dev(ctx);
	u32 ctrl_ext;

	INIT_DEBUGOUT("ixgbe_detach: begin");

	if (ixgbe_pci_iov_detach(dev) != 0) {
		device_printf(dev, "SR-IOV in use; detach first.\n");
		return (EBUSY);
	}

	ixgbe_setup_low_power_mode(ctx);

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

	callout_drain(&sc->fw_mode_timer);

	ixgbe_free_pci_resources(ctx);
	free(sc->mta, M_IXGBE);

	return (0);
} /* ixgbe_if_detach */

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

	if (!hw->wol_enabled)
		ixgbe_set_phy_power(hw, false);

	/* 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_BY_MAC(hw),
		    IXGBE_READ_REG(hw, IXGBE_GRC_BY_MAC(hw)) & ~(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, sc->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_if_stop(ctx);
		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_if_stop(ctx);
	}

	return error;
} /* ixgbe_setup_low_power_mode */

/************************************************************************
 * ixgbe_shutdown - Shutdown entry point
 ************************************************************************/
static int
ixgbe_if_shutdown(if_ctx_t ctx)
{
	int error = 0;

	INIT_DEBUGOUT("ixgbe_shutdown: begin");

	error = ixgbe_setup_low_power_mode(ctx);

	return (error);
} /* ixgbe_if_shutdown */

/************************************************************************
 * ixgbe_suspend
 *
 *   From D0 to D3
 ************************************************************************/
static int
ixgbe_if_suspend(if_ctx_t ctx)
{
	int error = 0;

	INIT_DEBUGOUT("ixgbe_suspend: begin");

	error = ixgbe_setup_low_power_mode(ctx);

	return (error);
} /* ixgbe_if_suspend */

/************************************************************************
 * ixgbe_resume
 *
 *   From D3 to D0
 ************************************************************************/
static int
ixgbe_if_resume(if_ctx_t ctx)
{
	struct ixgbe_softc *sc = iflib_get_softc(ctx);
	device_t dev = iflib_get_dev(ctx);
	if_t ifp = iflib_get_ifp(ctx);
	struct ixgbe_hw *hw = &sc->hw;
	u32 wus;

	INIT_DEBUGOUT("ixgbe_resume: begin");

	/* 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 (if_getflags(ifp) & IFF_UP)
		ixgbe_if_init(ctx);

	return (0);
} /* ixgbe_if_resume */

/************************************************************************
 * ixgbe_if_mtu_set - Ioctl mtu entry point
 *
 *   Return 0 on success, EINVAL on failure
 ************************************************************************/
static int
ixgbe_if_mtu_set(if_ctx_t ctx, uint32_t mtu)
{
	struct ixgbe_softc *sc = iflib_get_softc(ctx);
	int error = 0;

	IOCTL_DEBUGOUT("ioctl: SIOCIFMTU (Set Interface MTU)");

	if (mtu > IXGBE_MAX_MTU) {
		error = EINVAL;
	} else {
		sc->max_frame_size = mtu + IXGBE_MTU_HDR;
	}

	return error;
} /* ixgbe_if_mtu_set */

/************************************************************************
 * ixgbe_if_crcstrip_set
 ************************************************************************/
static void
ixgbe_if_crcstrip_set(if_ctx_t ctx, int onoff, int crcstrip)
{
	struct ixgbe_softc *sc = iflib_get_softc(ctx);
	struct ixgbe_hw *hw = &sc->hw;
	/* crc stripping is set in two places:
	 * IXGBE_HLREG0 (modified on init_locked and hw reset)
	 * IXGBE_RDRXCTL (set by the original driver in
	 *	ixgbe_setup_hw_rsc() called in init_locked.
	 *	We disable the setting when netmap is compiled in).
	 * We update the values here, but also in ixgbe.c because
	 * init_locked sometimes is called outside our control.
	 */
	uint32_t hl, rxc;

	hl = IXGBE_READ_REG(hw, IXGBE_HLREG0);
	rxc = IXGBE_READ_REG(hw, IXGBE_RDRXCTL);
#ifdef NETMAP
	if (netmap_verbose)
		D("%s read  HLREG 0x%x rxc 0x%x",
			onoff ? "enter" : "exit", hl, rxc);
#endif
	/* hw requirements ... */
	rxc &= ~IXGBE_RDRXCTL_RSCFRSTSIZE;
	rxc |= IXGBE_RDRXCTL_RSCACKC;
	if (onoff && !crcstrip) {
		/* keep the crc. Fast rx */
		hl &= ~IXGBE_HLREG0_RXCRCSTRP;
		rxc &= ~IXGBE_RDRXCTL_CRCSTRIP;
	} else {
		/* reset default mode */
		hl |= IXGBE_HLREG0_RXCRCSTRP;
		rxc |= IXGBE_RDRXCTL_CRCSTRIP;
	}
#ifdef NETMAP
	if (netmap_verbose)
		D("%s write HLREG 0x%x rxc 0x%x",
			onoff ? "enter" : "exit", hl, rxc);
#endif
	IXGBE_WRITE_REG(hw, IXGBE_HLREG0, hl);
	IXGBE_WRITE_REG(hw, IXGBE_RDRXCTL, rxc);
} /* ixgbe_if_crcstrip_set */

/*********************************************************************
 * ixgbe_if_init - Init entry point
 *
 *   Used in two ways: It is used by the stack as an 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
 **********************************************************************/
void
ixgbe_if_init(if_ctx_t ctx)
{
	struct ixgbe_softc *sc = iflib_get_softc(ctx);
	if_t ifp = iflib_get_ifp(ctx);
	device_t dev = iflib_get_dev(ctx);
	struct ixgbe_hw *hw = &sc->hw;
	struct ix_rx_queue *rx_que;
	struct ix_tx_queue *tx_que;
	u32 txdctl, mhadd;
	u32 rxdctl, rxctrl;
	u32 ctrl_ext;

	int i, j, err;

	INIT_DEBUGOUT("ixgbe_if_init: begin");

	/* Queue indices may change with IOV mode */
	ixgbe_align_all_queue_indices(sc);

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

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

	ixgbe_init_hw(hw);

	ixgbe_initialize_iov(sc);

	ixgbe_initialize_transmit_units(ctx);

	/* Setup Multicast table */
	ixgbe_if_multi_set(ctx);

	/* Determine the correct mbuf pool, based on frame size */
	sc->rx_mbuf_sz = iflib_get_rx_mbuf_sz(ctx);

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

	/*
	 * Initialize variable holding task enqueue requests
	 * from MSI-X interrupts
	 */
	sc->task_requests = 0;

	/* Enable SDP & MSI-X interrupts based on adapter */
	ixgbe_config_gpie(sc);

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

	/* Now enable all the queues */
	for (i = 0, tx_que = sc->tx_queues; i < sc->num_tx_queues;
	    i++, tx_que++) {
		struct tx_ring *txr = &tx_que->txr;

		txdctl = IXGBE_READ_REG(hw, IXGBE_TXDCTL(txr->me));
		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(txr->me), txdctl);
	}

	for (i = 0, rx_que = sc->rx_queues; i < sc->num_rx_queues;
	    i++, rx_que++) {
		struct rx_ring *rxr = &rx_que->rxr;

		rxdctl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(rxr->me));
		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(rxr->me), rxdctl);
		for (j = 0; j < 10; j++) {
			if (IXGBE_READ_REG(hw, IXGBE_RXDCTL(rxr->me)) &
			    IXGBE_RXDCTL_ENABLE)
				break;
			else
				msec_delay(1);
		}
		wmb();
	}

	/* 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);

	/* Set up MSI/MSI-X routing */
	if (ixgbe_enable_msix)  {
		ixgbe_configure_ivars(sc);
		/* 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(sc, 0, 0, 0);
		ixgbe_set_ivar(sc, 0, 0, 1);
		IXGBE_WRITE_REG(hw, IXGBE_EIAM, IXGBE_EICS_RTX_QUEUE);
	}

	ixgbe_init_fdir(sc);

	/*
	 * Check on any SFP devices that
	 * need to be kick-started
	 */
	if (hw->phy.type == ixgbe_phy_none) {
		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(sc->vector), IXGBE_LINK_ITR);

	/* Enable power to the phy. */
	ixgbe_set_phy_power(hw, true);

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

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

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

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

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

	/* And now turn on interrupts */
	ixgbe_if_enable_intr(ctx);

	/* Enable the use of the MBX by the VF's */
	if (sc->feat_en & IXGBE_FEATURE_SRIOV) {
		ctrl_ext = IXGBE_READ_REG(hw, IXGBE_CTRL_EXT);
		ctrl_ext |= IXGBE_CTRL_EXT_PFRSTD;
		IXGBE_WRITE_REG(hw, IXGBE_CTRL_EXT, ctrl_ext);
	}

} /* ixgbe_init_locked */

/************************************************************************
 * ixgbe_set_ivar
 *
 *   Setup the correct IVAR register for a particular MSI-X interrupt
 *     (yes this is all very magic and confusing :)
 *    - entry is the register array entry
 *    - vector is the MSI-X vector for this queue
 *    - type is RX/TX/MISC
 ************************************************************************/
static void
ixgbe_set_ivar(struct ixgbe_softc *sc, u8 entry, u8 vector, s8 type)
{
	struct ixgbe_hw *hw = &sc->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(&sc->hw, IXGBE_IVAR(index), ivar);
		break;
	case ixgbe_mac_82599EB:
	case ixgbe_mac_X540:
	case ixgbe_mac_X550:
	case ixgbe_mac_X550EM_x:
	case ixgbe_mac_X550EM_a:
		if (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;
	}
} /* ixgbe_set_ivar */

/************************************************************************
 * ixgbe_configure_ivars
 ************************************************************************/
static void
ixgbe_configure_ivars(struct ixgbe_softc *sc)
{
	struct ix_rx_queue *rx_que = sc->rx_queues;
	struct ix_tx_queue *tx_que = sc->tx_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.
		 */
		sc->dmac = 0;
		newitr = 0;
	}

	for (int i = 0; i < sc->num_rx_queues; i++, rx_que++) {
		struct rx_ring *rxr = &rx_que->rxr;

		/* First the RX queue entry */
		ixgbe_set_ivar(sc, rxr->me, rx_que->msix, 0);

		/* Set an Initial EITR value */
		IXGBE_WRITE_REG(&sc->hw, IXGBE_EITR(rx_que->msix), newitr);
	}
	for (int i = 0; i < sc->num_tx_queues; i++, tx_que++) {
		struct tx_ring *txr = &tx_que->txr;

		/* ... and the TX */
		ixgbe_set_ivar(sc, txr->me, tx_que->msix, 1);
	}
	/* For the Link interrupt */
	ixgbe_set_ivar(sc, 1, sc->vector, -1);
} /* ixgbe_configure_ivars */

/************************************************************************
 * ixgbe_config_gpie
 ************************************************************************/
static void
ixgbe_config_gpie(struct ixgbe_softc *sc)
{
	struct ixgbe_hw *hw = &sc->hw;
	u32 gpie;

	gpie = IXGBE_READ_REG(hw, IXGBE_GPIE);

	if (sc->intr_type == IFLIB_INTR_MSIX) {
		/* Enable Enhanced MSI-X mode */
		gpie |= IXGBE_GPIE_MSIX_MODE |
		    IXGBE_GPIE_EIAME |
		    IXGBE_GPIE_PBA_SUPPORT |
		    IXGBE_GPIE_OCD;
	}

	/* Fan Failure Interrupt */
	if (sc->feat_en & IXGBE_FEATURE_FAN_FAIL)
		gpie |= IXGBE_SDP1_GPIEN;

	/* Thermal Sensor Interrupt */
	if (sc->feat_en & IXGBE_FEATURE_TEMP_SENSOR)
		gpie |= IXGBE_SDP0_GPIEN_X540;

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

	IXGBE_WRITE_REG(hw, IXGBE_GPIE, gpie);

} /* ixgbe_config_gpie */

/************************************************************************
 * ixgbe_config_delay_values
 *
 *   Requires sc->max_frame_size to be set.
 ************************************************************************/
static void
ixgbe_config_delay_values(struct ixgbe_softc *sc)
{
	struct ixgbe_hw *hw = &sc->hw;
	u32 rxpb, frame, size, tmp;

	frame = sc->max_frame_size;

	/* Calculate High Water */
	switch (hw->mac.type) {
	case ixgbe_mac_X540:
	case ixgbe_mac_X550:
	case ixgbe_mac_X550EM_x:
	case ixgbe_mac_X550EM_a:
		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:
	case ixgbe_mac_X550EM_a:
		tmp = IXGBE_LOW_DV_X540(frame);
		break;
	default:
		tmp = IXGBE_LOW_DV(frame);
		break;
	}
	hw->fc.low_water[0] = IXGBE_BT2KB(tmp);

	hw->fc.pause_time = IXGBE_FC_PAUSE;
	hw->fc.send_xon = true;
} /* ixgbe_config_delay_values */

/************************************************************************
 * ixgbe_set_multi - Multicast Update
 *
 *   Called whenever multicast address list is updated.
 ************************************************************************/
static u_int
ixgbe_mc_filter_apply(void *arg, struct sockaddr_dl *sdl, u_int idx)
{
	struct ixgbe_softc *sc = arg;
	struct ixgbe_mc_addr *mta = sc->mta;

	if (idx == MAX_NUM_MULTICAST_ADDRESSES)
		return (0);
	bcopy(LLADDR(sdl), mta[idx].addr, IXGBE_ETH_LENGTH_OF_ADDRESS);
	mta[idx].vmdq = sc->pool;

	return (1);
} /* ixgbe_mc_filter_apply */

static void
ixgbe_if_multi_set(if_ctx_t ctx)
{
	struct ixgbe_softc *sc = iflib_get_softc(ctx);
	struct ixgbe_mc_addr *mta;
	if_t ifp = iflib_get_ifp(ctx);
	u8 *update_ptr;
	u32 fctrl;
	u_int mcnt;

	IOCTL_DEBUGOUT("ixgbe_if_multi_set: begin");

	mta = sc->mta;
	bzero(mta, sizeof(*mta) * MAX_NUM_MULTICAST_ADDRESSES);

	mcnt = if_foreach_llmaddr(iflib_get_ifp(ctx), ixgbe_mc_filter_apply,
	    sc);

	if (mcnt < MAX_NUM_MULTICAST_ADDRESSES) {
		update_ptr = (u8 *)mta;
		ixgbe_update_mc_addr_list(&sc->hw, update_ptr, mcnt,
		    ixgbe_mc_array_itr, true);
	}

	fctrl = IXGBE_READ_REG(&sc->hw, IXGBE_FCTRL);

	if (if_getflags(ifp) & IFF_PROMISC)
		fctrl |= (IXGBE_FCTRL_UPE | IXGBE_FCTRL_MPE);
	else if (mcnt >= MAX_NUM_MULTICAST_ADDRESSES ||
	    if_getflags(ifp) & IFF_ALLMULTI) {
		fctrl |= IXGBE_FCTRL_MPE;
		fctrl &= ~IXGBE_FCTRL_UPE;
	} else
		fctrl &= ~(IXGBE_FCTRL_UPE | IXGBE_FCTRL_MPE);

	IXGBE_WRITE_REG(&sc->hw, IXGBE_FCTRL, fctrl);
} /* ixgbe_if_multi_set */

/************************************************************************
 * ixgbe_mc_array_itr
 *
 *   An iterator function needed by the multicast shared code.
 *   It 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)
{
	struct ixgbe_mc_addr *mta;

	mta = (struct ixgbe_mc_addr *)*update_ptr;
	*vmdq = mta->vmdq;

	*update_ptr = (u8*)(mta + 1);

	return (mta->addr);
} /* ixgbe_mc_array_itr */

/************************************************************************
 * ixgbe_local_timer - Timer routine
 *
 *   Checks for link status, updates statistics,
 *   and runs the watchdog check.
 ************************************************************************/
static void
ixgbe_if_timer(if_ctx_t ctx, uint16_t qid)
{
	struct ixgbe_softc *sc = iflib_get_softc(ctx);

	if (qid != 0)
		return;

	/* Check for pluggable optics */
	if (sc->sfp_probe)
		if (!ixgbe_sfp_probe(ctx))
			return; /* Nothing to do */

	ixgbe_check_link(&sc->hw, &sc->link_speed, &sc->link_up, 0);

	/* Fire off the adminq task */
	iflib_admin_intr_deferred(ctx);

} /* ixgbe_if_timer */

/************************************************************************
 * ixgbe_fw_mode_timer - FW mode timer routine
 ************************************************************************/
static void
ixgbe_fw_mode_timer(void *arg)
{
	struct ixgbe_softc *sc = arg;
	struct ixgbe_hw *hw = &sc->hw;

	if (ixgbe_fw_recovery_mode(hw)) {
		if (atomic_cmpset_acq_int(&sc->recovery_mode, 0, 1)) {
			/* Firmware error detected, entering recovery mode */
			device_printf(sc->dev,
			    "Firmware recovery mode detected. Limiting"
			    " functionality. Refer to the Intel(R) Ethernet"
			    " Adapters and Devices User Guide for details on"
			    " firmware recovery mode.\n");

			if (hw->adapter_stopped == FALSE)
				ixgbe_if_stop(sc->ctx);
		}
	} else
		atomic_cmpset_acq_int(&sc->recovery_mode, 1, 0);


	callout_reset(&sc->fw_mode_timer, hz,
	    ixgbe_fw_mode_timer, sc);
} /* ixgbe_fw_mode_timer */

/************************************************************************
 * ixgbe_sfp_probe
 *
 *   Determine if a port had optics inserted.
 ************************************************************************/
static bool
ixgbe_sfp_probe(if_ctx_t ctx)
{
	struct ixgbe_softc *sc = iflib_get_softc(ctx);
	struct ixgbe_hw *hw = &sc->hw;
	device_t dev = iflib_get_dev(ctx);
	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);
		sc->sfp_probe = false;
		if (ret == IXGBE_ERR_SFP_NOT_SUPPORTED) {
			device_printf(dev,
			    "Unsupported SFP+ module detected!");
			device_printf(dev,
			    "Reload driver with supported module.\n");
			goto out;
		} else
			device_printf(dev, "SFP+ module detected!\n");
		/* We now have supported optics */
		result = true;
	}
out:

	return (result);
} /* ixgbe_sfp_probe */

/************************************************************************
 * ixgbe_handle_mod - Tasklet for SFP module interrupts
 ************************************************************************/
static void
ixgbe_handle_mod(void *context)
{
	if_ctx_t ctx = context;
	struct ixgbe_softc *sc = iflib_get_softc(ctx);
	struct ixgbe_hw *hw = &sc->hw;
	device_t dev = iflib_get_dev(ctx);
	u32 err, cage_full = 0;

	if (sc->hw.need_crosstalk_fix) {
		switch (hw->mac.type) {
		case ixgbe_mac_82599EB:
			cage_full = IXGBE_READ_REG(hw, IXGBE_ESDP) &
			    IXGBE_ESDP_SDP2;
			break;
		case ixgbe_mac_X550EM_x:
		case ixgbe_mac_X550EM_a:
			cage_full = IXGBE_READ_REG(hw, IXGBE_ESDP) &
			    IXGBE_ESDP_SDP0;
			break;
		default:
			break;
		}

		if (!cage_full)
			goto handle_mod_out;
	}

	err = hw->phy.ops.identify_sfp(hw);
	if (err == IXGBE_ERR_SFP_NOT_SUPPORTED) {
		device_printf(dev,
		    "Unsupported SFP+ module type was detected.\n");
		goto handle_mod_out;
	}

	if (hw->mac.type == ixgbe_mac_82598EB)
		err = hw->phy.ops.reset(hw);
	else
		err = hw->mac.ops.setup_sfp(hw);

	if (err == IXGBE_ERR_SFP_NOT_SUPPORTED) {
		device_printf(dev,
		    "Setup failure - unsupported SFP+ module type.\n");
		goto handle_mod_out;
	}
	sc->task_requests |= IXGBE_REQUEST_TASK_MSF;
	return;

handle_mod_out:
	sc->task_requests &= ~(IXGBE_REQUEST_TASK_MSF);
} /* ixgbe_handle_mod */


/************************************************************************
 * ixgbe_handle_msf - Tasklet for MSF (multispeed fiber) interrupts
 ************************************************************************/
static void
ixgbe_handle_msf(void *context)
{
	if_ctx_t ctx = context;
	struct ixgbe_softc *sc = iflib_get_softc(ctx);
	struct ixgbe_hw *hw = &sc->hw;
	u32 autoneg;
	bool negotiate;

	/* get_supported_phy_layer will call hw->phy.ops.identify_sfp() */
	sc->phy_layer = ixgbe_get_supported_physical_layer(hw);

	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);

	/* Adjust media types shown in ifconfig */
	ifmedia_removeall(sc->media);
	ixgbe_add_media_types(sc->ctx);
	ifmedia_set(sc->media, IFM_ETHER | IFM_AUTO);
} /* ixgbe_handle_msf */

/************************************************************************
 * ixgbe_handle_phy - Tasklet for external PHY interrupts
 ************************************************************************/
static void
ixgbe_handle_phy(void *context)
{
	if_ctx_t ctx = context;
	struct ixgbe_softc *sc = iflib_get_softc(ctx);
	struct ixgbe_hw *hw = &sc->hw;
	int error;

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

/************************************************************************
 * ixgbe_if_stop - Stop the hardware
 *
 *   Disables all traffic on the adapter by issuing a
 *   global reset on the MAC and deallocates TX/RX buffers.
 ************************************************************************/
static void
ixgbe_if_stop(if_ctx_t ctx)
{
	struct ixgbe_softc *sc = iflib_get_softc(ctx);
	struct ixgbe_hw *hw = &sc->hw;

	INIT_DEBUGOUT("ixgbe_if_stop: begin\n");

	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 */
	sc->link_up = false;
	ixgbe_if_update_admin_status(ctx);

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

	return;
} /* ixgbe_if_stop */

/************************************************************************
 * ixgbe_update_link_status - Update OS on link state
 *
 * Note: Only updates the OS on the cached link state.
 *       The real check of the hardware only happens with
 *       a link interrupt.
 ************************************************************************/
static void
ixgbe_if_update_admin_status(if_ctx_t ctx)
{
	struct ixgbe_softc *sc = iflib_get_softc(ctx);
	device_t dev = iflib_get_dev(ctx);

	if (sc->link_up) {
		if (sc->link_active == false) {
			if (bootverbose)
				device_printf(dev, "Link is up %d Gbps %s \n",
				    ((sc->link_speed == 128) ? 10 : 1),
				    "Full Duplex");
			sc->link_active = true;
			/* Update any Flow Control changes */
			ixgbe_fc_enable(&sc->hw);
			/* Update DMA coalescing config */
			ixgbe_config_dmac(sc);
			iflib_link_state_change(ctx, LINK_STATE_UP,
			    ixgbe_link_speed_to_baudrate(sc->link_speed));

			if (sc->feat_en & IXGBE_FEATURE_SRIOV)
				ixgbe_ping_all_vfs(sc);
		}
	} else { /* Link down */
		if (sc->link_active == true) {
			if (bootverbose)
				device_printf(dev, "Link is Down\n");
			iflib_link_state_change(ctx, LINK_STATE_DOWN, 0);
			sc->link_active = false;
			if (sc->feat_en & IXGBE_FEATURE_SRIOV)
				ixgbe_ping_all_vfs(sc);
		}
	}

	/* Handle task requests from msix_link() */
	if (sc->task_requests & IXGBE_REQUEST_TASK_MOD)
		ixgbe_handle_mod(ctx);
	if (sc->task_requests & IXGBE_REQUEST_TASK_MSF)
		ixgbe_handle_msf(ctx);
	if (sc->task_requests & IXGBE_REQUEST_TASK_MBX)
		ixgbe_handle_mbx(ctx);
	if (sc->task_requests & IXGBE_REQUEST_TASK_FDIR)
		ixgbe_reinit_fdir(ctx);
	if (sc->task_requests & IXGBE_REQUEST_TASK_PHY)
		ixgbe_handle_phy(ctx);
	sc->task_requests = 0;

	ixgbe_update_stats_counters(sc);
} /* ixgbe_if_update_admin_status */

/************************************************************************
 * ixgbe_config_dmac - Configure DMA Coalescing
 ************************************************************************/
static void
ixgbe_config_dmac(struct ixgbe_softc *sc)
{
	struct ixgbe_hw *hw = &sc->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 ^ sc->dmac ||
	    dcfg->link_speed ^ sc->link_speed) {
		dcfg->watchdog_timer = sc->dmac;
		dcfg->fcoe_en = false;
		dcfg->link_speed = sc->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);
	}
} /* ixgbe_config_dmac */

/************************************************************************
 * ixgbe_if_enable_intr
 ************************************************************************/
void
ixgbe_if_enable_intr(if_ctx_t ctx)
{
	struct ixgbe_softc *sc = iflib_get_softc(ctx);
	struct ixgbe_hw *hw = &sc->hw;
	struct ix_rx_queue *que = sc->rx_queues;
	u32 mask, fwsm;

	mask = (IXGBE_EIMS_ENABLE_MASK & ~IXGBE_EIMS_RTX_QUEUE);

	switch (sc->hw.mac.type) {
	case ixgbe_mac_82599EB:
		mask |= IXGBE_EIMS_ECC;
		/* Temperature sensor on some scs */
		mask |= IXGBE_EIMS_GPI_SDP0;
		/* SFP+ (RX_LOS_N & MOD_ABS_N) */
		mask |= IXGBE_EIMS_GPI_SDP1;
		mask |= IXGBE_EIMS_GPI_SDP2;
		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;
		break;
	case ixgbe_mac_X550:
		/* MAC thermal sensor is automatically enabled */
		mask |= IXGBE_EIMS_TS;
		mask |= IXGBE_EIMS_ECC;
		break;
	case ixgbe_mac_X550EM_x:
	case ixgbe_mac_X550EM_a:
		/* Some devices use SDP0 for important information */
		if (hw->device_id == IXGBE_DEV_ID_X550EM_X_SFP ||
		    hw->device_id == IXGBE_DEV_ID_X550EM_A_SFP ||
		    hw->device_id == IXGBE_DEV_ID_X550EM_A_SFP_N ||
		    hw->device_id == IXGBE_DEV_ID_X550EM_X_10G_T)
			mask |= IXGBE_EIMS_GPI_SDP0_BY_MAC(hw);
		if (hw->phy.type == ixgbe_phy_x550em_ext_t)
			mask |= IXGBE_EICR_GPI_SDP0_X540;
		mask |= IXGBE_EIMS_ECC;
		break;
	default:
		break;
	}

	/* Enable Fan Failure detection */
	if (sc->feat_en & IXGBE_FEATURE_FAN_FAIL)
		mask |= IXGBE_EIMS_GPI_SDP1;
	/* Enable SR-IOV */
	if (sc->feat_en & IXGBE_FEATURE_SRIOV)
		mask |= IXGBE_EIMS_MAILBOX;
	/* Enable Flow Director */
	if (sc->feat_en & IXGBE_FEATURE_FDIR)
		mask |= IXGBE_EIMS_FLOW_DIR;

	IXGBE_WRITE_REG(hw, IXGBE_EIMS, mask);

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

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

	IXGBE_WRITE_FLUSH(hw);

} /* ixgbe_if_enable_intr */

/************************************************************************
 * ixgbe_disable_intr
 ************************************************************************/
static void
ixgbe_if_disable_intr(if_ctx_t ctx)
{
	struct ixgbe_softc *sc = iflib_get_softc(ctx);

	if (sc->intr_type == IFLIB_INTR_MSIX)
		IXGBE_WRITE_REG(&sc->hw, IXGBE_EIAC, 0);
	if (sc->hw.mac.type == ixgbe_mac_82598EB) {
		IXGBE_WRITE_REG(&sc->hw, IXGBE_EIMC, ~0);
	} else {
		IXGBE_WRITE_REG(&sc->hw, IXGBE_EIMC, 0xFFFF0000);
		IXGBE_WRITE_REG(&sc->hw, IXGBE_EIMC_EX(0), ~0);
		IXGBE_WRITE_REG(&sc->hw, IXGBE_EIMC_EX(1), ~0);
	}
	IXGBE_WRITE_FLUSH(&sc->hw);

} /* ixgbe_if_disable_intr */

/************************************************************************
 * ixgbe_link_intr_enable
 ************************************************************************/
static void
ixgbe_link_intr_enable(if_ctx_t ctx)
{
	struct ixgbe_hw *hw =
	    &((struct ixgbe_softc *)iflib_get_softc(ctx))->hw;

	/* Re-enable other interrupts */
	IXGBE_WRITE_REG(hw, IXGBE_EIMS, IXGBE_EIMS_OTHER | IXGBE_EIMS_LSC);
} /* ixgbe_link_intr_enable */

/************************************************************************
 * ixgbe_if_rx_queue_intr_enable
 ************************************************************************/
static int
ixgbe_if_rx_queue_intr_enable(if_ctx_t ctx, uint16_t rxqid)
{
	struct ixgbe_softc *sc = iflib_get_softc(ctx);
	struct ix_rx_queue *que = &sc->rx_queues[rxqid];

	ixgbe_enable_queue(sc, que->msix);

	return (0);
} /* ixgbe_if_rx_queue_intr_enable */

/************************************************************************
 * ixgbe_enable_queue
 ************************************************************************/
static void
ixgbe_enable_queue(struct ixgbe_softc *sc, u32 vector)
{
	struct ixgbe_hw *hw = &sc->hw;
	u64 queue = 1ULL << 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);
	}
} /* ixgbe_enable_queue */

/************************************************************************
 * ixgbe_disable_queue
 ************************************************************************/
static void
ixgbe_disable_queue(struct ixgbe_softc *sc, u32 vector)
{
	struct ixgbe_hw *hw = &sc->hw;
	u64 queue = 1ULL << 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);
	}
} /* ixgbe_disable_queue */

/************************************************************************
 * ixgbe_intr - Legacy Interrupt Service Routine
 ************************************************************************/
int
ixgbe_intr(void *arg)
{
	struct ixgbe_softc *sc = arg;
	struct ix_rx_queue *que = sc->rx_queues;
	struct ixgbe_hw *hw = &sc->hw;
	if_ctx_t ctx = sc->ctx;
	u32 eicr, eicr_mask;

	eicr = IXGBE_READ_REG(hw, IXGBE_EICR);

	++que->irqs;
	if (eicr == 0) {
		ixgbe_if_enable_intr(ctx);
		return (FILTER_HANDLED);
	}

	/* Check for fan failure */
	if ((sc->feat_en & IXGBE_FEATURE_FAN_FAIL) &&
	    (eicr & IXGBE_EICR_GPI_SDP1)) {
		device_printf(sc->dev,
		    "\nCRITICAL: FAN FAILURE!! REPLACE IMMEDIATELY!!\n");
		IXGBE_WRITE_REG(hw, IXGBE_EIMS,
		    IXGBE_EICR_GPI_SDP1_BY_MAC(hw));
	}

	/* Link status change */
	if (eicr & IXGBE_EICR_LSC) {
		IXGBE_WRITE_REG(hw, IXGBE_EIMC, IXGBE_EIMC_LSC);
		iflib_admin_intr_deferred(ctx);
	}

	if (ixgbe_is_sfp(hw)) {
		/* Pluggable optics-related interrupt */
		if (hw->mac.type >= ixgbe_mac_X540)
			eicr_mask = IXGBE_EICR_GPI_SDP0_X540;
		else
			eicr_mask = IXGBE_EICR_GPI_SDP2_BY_MAC(hw);

		if (eicr & eicr_mask) {
			IXGBE_WRITE_REG(hw, IXGBE_EICR, eicr_mask);
			sc->task_requests |= IXGBE_REQUEST_TASK_MOD;
		}

		if ((hw->mac.type == ixgbe_mac_82599EB) &&
		    (eicr & IXGBE_EICR_GPI_SDP1_BY_MAC(hw))) {
			IXGBE_WRITE_REG(hw, IXGBE_EICR,
			    IXGBE_EICR_GPI_SDP1_BY_MAC(hw));
			sc->task_requests |= IXGBE_REQUEST_TASK_MSF;
		}
	}

	/* External PHY interrupt */
	if ((hw->phy.type == ixgbe_phy_x550em_ext_t) &&
	    (eicr & IXGBE_EICR_GPI_SDP0_X540))
		sc->task_requests |= IXGBE_REQUEST_TASK_PHY;

	return (FILTER_SCHEDULE_THREAD);
} /* ixgbe_intr */

/************************************************************************
 * ixgbe_free_pci_resources
 ************************************************************************/
static void
ixgbe_free_pci_resources(if_ctx_t ctx)
{
	struct ixgbe_softc *sc = iflib_get_softc(ctx);
	struct ix_rx_queue *que = sc->rx_queues;
	device_t dev = iflib_get_dev(ctx);

	/* Release all MSI-X queue resources */
	if (sc->intr_type == IFLIB_INTR_MSIX)
		iflib_irq_free(ctx, &sc->irq);

	if (que != NULL) {
		for (int i = 0; i < sc->num_rx_queues; i++, que++) {
			iflib_irq_free(ctx, &que->que_irq);
		}
	}

	if (sc->pci_mem != NULL)
		bus_release_resource(dev, SYS_RES_MEMORY,
		    rman_get_rid(sc->pci_mem), sc->pci_mem);
} /* ixgbe_free_pci_resources */

/************************************************************************
 * ixgbe_sysctl_flowcntl
 *
 *   SYSCTL wrapper around setting Flow Control
 ************************************************************************/
static int
ixgbe_sysctl_flowcntl(SYSCTL_HANDLER_ARGS)
{
	struct ixgbe_softc *sc;
	int error, fc;

	sc = (struct ixgbe_softc *)arg1;
	fc = sc->hw.fc.current_mode;

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

	/* Don't bother if it's not changed */
	if (fc == sc->hw.fc.current_mode)
		return (0);

	return ixgbe_set_flowcntl(sc, fc);
} /* ixgbe_sysctl_flowcntl */

/************************************************************************
 * ixgbe_set_flowcntl - Set flow control
 *
 *   Flow control values:
 *     0 - off
 *     1 - rx pause
 *     2 - tx pause
 *     3 - full
 ************************************************************************/
static int
ixgbe_set_flowcntl(struct ixgbe_softc *sc, int fc)
{
	switch (fc) {
	case ixgbe_fc_rx_pause:
	case ixgbe_fc_tx_pause:
	case ixgbe_fc_full:
		sc->hw.fc.requested_mode = fc;
		if (sc->num_rx_queues > 1)
			ixgbe_disable_rx_drop(sc);
		break;
	case ixgbe_fc_none:
		sc->hw.fc.requested_mode = ixgbe_fc_none;
		if (sc->num_rx_queues > 1)
			ixgbe_enable_rx_drop(sc);
		break;
	default:
		return (EINVAL);
	}

	/* Don't autoneg if forcing a value */
	sc->hw.fc.disable_fc_autoneg = true;
	ixgbe_fc_enable(&sc->hw);

	return (0);
} /* ixgbe_set_flowcntl */

/************************************************************************
 * ixgbe_enable_rx_drop
 *
 *   Enable the hardware to drop packets when the buffer is
 *   full. This is useful with multiqueue, so that no single
 *   queue being full stalls the entire RX engine. We only
 *   enable this when Multiqueue is enabled AND Flow Control
 *   is disabled.
 ************************************************************************/
static void
ixgbe_enable_rx_drop(struct ixgbe_softc *sc)
{
	struct ixgbe_hw *hw = &sc->hw;
	struct rx_ring *rxr;
	u32 srrctl;

	for (int i = 0; i < sc->num_rx_queues; i++) {
		rxr = &sc->rx_queues[i].rxr;
		srrctl = IXGBE_READ_REG(hw, IXGBE_SRRCTL(rxr->me));
		srrctl |= IXGBE_SRRCTL_DROP_EN;
		IXGBE_WRITE_REG(hw, IXGBE_SRRCTL(rxr->me), srrctl);
	}

	/* enable drop for each vf */
	for (int i = 0; i < sc->num_vfs; i++) {
		IXGBE_WRITE_REG(hw, IXGBE_QDE,
		    (IXGBE_QDE_WRITE |
		    (i << IXGBE_QDE_IDX_SHIFT) |
		    IXGBE_QDE_ENABLE));
	}
} /* ixgbe_enable_rx_drop */

/************************************************************************
 * ixgbe_disable_rx_drop
 ************************************************************************/
static void
ixgbe_disable_rx_drop(struct ixgbe_softc *sc)
{
	struct ixgbe_hw *hw = &sc->hw;
	struct rx_ring *rxr;
	u32 srrctl;

	for (int i = 0; i < sc->num_rx_queues; i++) {
		rxr = &sc->rx_queues[i].rxr;
		srrctl = IXGBE_READ_REG(hw, IXGBE_SRRCTL(rxr->me));
		srrctl &= ~IXGBE_SRRCTL_DROP_EN;
		IXGBE_WRITE_REG(hw, IXGBE_SRRCTL(rxr->me), srrctl);
	}

	/* disable drop for each vf */
	for (int i = 0; i < sc->num_vfs; i++) {
		IXGBE_WRITE_REG(hw, IXGBE_QDE,
		    (IXGBE_QDE_WRITE | (i << IXGBE_QDE_IDX_SHIFT)));
	}
} /* ixgbe_disable_rx_drop */

/************************************************************************
 * ixgbe_sysctl_advertise
 *
 *   SYSCTL wrapper around setting advertised speed
 ************************************************************************/
static int
ixgbe_sysctl_advertise(SYSCTL_HANDLER_ARGS)
{
	struct ixgbe_softc *sc;
	int error, advertise;

	sc = (struct ixgbe_softc *)arg1;
	if (atomic_load_acq_int(&sc->recovery_mode))
		return (EPERM);

	advertise = sc->advertise;

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

	return ixgbe_set_advertise(sc, advertise);
} /* ixgbe_sysctl_advertise */

/************************************************************************
 * ixgbe_set_advertise - Control advertised link speed
 *
 *   Flags:
 *     0x1  - advertise 100 Mb
 *     0x2  - advertise 1G
 *     0x4  - advertise 10G
 *     0x8  - advertise 10 Mb (yes, Mb)
 *     0x10 - advertise 2.5G (disabled by default)
 *     0x20 - advertise 5G (disabled by default)
 *
 ************************************************************************/
static int
ixgbe_set_advertise(struct ixgbe_softc *sc, int advertise)
{
	device_t dev = iflib_get_dev(sc->ctx);
	struct ixgbe_hw *hw;
	ixgbe_link_speed speed = 0;
	ixgbe_link_speed link_caps = 0;
	s32 err = IXGBE_NOT_IMPLEMENTED;
	bool negotiate = false;

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

	hw = &sc->hw;

	/* No speed changes for backplane media */
	if (hw->phy.media_type == ixgbe_media_type_backplane)
		return (ENODEV);

	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 (advertise < 0x1 || advertise > 0x3F) {
		device_printf(dev,
		    "Invalid advertised speed; valid modes are 0x1 through"
		    " 0x3F\n");
		return (EINVAL);
	}

	if (hw->mac.ops.get_link_capabilities) {
		err = hw->mac.ops.get_link_capabilities(hw, &link_caps,
		    &negotiate);
		if (err != IXGBE_SUCCESS) {
			device_printf(dev,
			    "Unable to determine supported advertise speeds"
			    "\n");
			return (ENODEV);
		}
	}

	/* Set new value and report new advertised mode */
	if (advertise & 0x1) {
		if (!(link_caps & IXGBE_LINK_SPEED_100_FULL)) {
			device_printf(dev,
			    "Interface does not support 100Mb advertised"
			    " speed\n");
			return (EINVAL);
		}
		speed |= IXGBE_LINK_SPEED_100_FULL;
	}
	if (advertise & 0x2) {
		if (!(link_caps & IXGBE_LINK_SPEED_1GB_FULL)) {
			device_printf(dev,
			    "Interface does not support 1Gb advertised speed"
			    "\n");
			return (EINVAL);
		}
		speed |= IXGBE_LINK_SPEED_1GB_FULL;
	}
	if (advertise & 0x4) {
		if (!(link_caps & IXGBE_LINK_SPEED_10GB_FULL)) {
			device_printf(dev,
			    "Interface does not support 10Gb advertised speed"
			    "\n");
			return (EINVAL);
		}
		speed |= IXGBE_LINK_SPEED_10GB_FULL;
	}
	if (advertise & 0x8) {
		if (!(link_caps & IXGBE_LINK_SPEED_10_FULL)) {
			device_printf(dev,
			    "Interface does not support 10Mb advertised speed"
			    "\n");
			return (EINVAL);
		}
		speed |= IXGBE_LINK_SPEED_10_FULL;
	}
	if (advertise & 0x10) {
		if (!(link_caps & IXGBE_LINK_SPEED_2_5GB_FULL)) {
			device_printf(dev,
			    "Interface does not support 2.5G advertised speed"
			    "\n");
			return (EINVAL);
		}
		speed |= IXGBE_LINK_SPEED_2_5GB_FULL;
	}
	if (advertise & 0x20) {
		if (!(link_caps & IXGBE_LINK_SPEED_5GB_FULL)) {
			device_printf(dev,
			    "Interface does not support 5G advertised speed"
			    "\n");
			return (EINVAL);
		}
		speed |= IXGBE_LINK_SPEED_5GB_FULL;
	}

	hw->mac.autotry_restart = true;
	hw->mac.ops.setup_link(hw, speed, true);
	sc->advertise = advertise;

	return (0);
} /* ixgbe_set_advertise */

/************************************************************************
 * ixgbe_get_default_advertise - Get default advertised speed settings
 *
 *   Formatted for sysctl usage.
 *   Flags:
 *     0x1 - advertise 100 Mb
 *     0x2 - advertise 1G
 *     0x4 - advertise 10G
 *     0x8 - advertise 10 Mb (yes, Mb)
 *     0x10 - advertise 2.5G (disabled by default)
 *     0x20 - advertise 5G (disabled by default)
 ************************************************************************/
static int
ixgbe_get_default_advertise(struct ixgbe_softc *sc)
{
	struct ixgbe_hw *hw = &sc->hw;
	int speed;
	ixgbe_link_speed link_caps = 0;
	s32 err;
	bool negotiate = false;

	/*
	 * Advertised speed means nothing unless it's copper or
	 * multi-speed fiber
	 */
	if (!(hw->phy.media_type == ixgbe_media_type_copper) &&
	    !(hw->phy.multispeed_fiber))
		return (0);

	err = hw->mac.ops.get_link_capabilities(hw, &link_caps, &negotiate);
	if (err != IXGBE_SUCCESS)
		return (0);

	if (hw->mac.type == ixgbe_mac_X550) {
		/*
		 * 2.5G and 5G autonegotiation speeds on X550
		 * are disabled by default due to reported
		 * interoperability issues with some switches.
		 */
		link_caps &= ~(IXGBE_LINK_SPEED_2_5GB_FULL |
		    IXGBE_LINK_SPEED_5GB_FULL);
	}

	speed =
	    ((link_caps & IXGBE_LINK_SPEED_10GB_FULL)  ? 0x4  : 0) |
	    ((link_caps & IXGBE_LINK_SPEED_5GB_FULL)   ? 0x20 : 0) |
	    ((link_caps & IXGBE_LINK_SPEED_2_5GB_FULL) ? 0x10 : 0) |
	    ((link_caps & IXGBE_LINK_SPEED_1GB_FULL)   ? 0x2  : 0) |
	    ((link_caps & IXGBE_LINK_SPEED_100_FULL)   ? 0x1  : 0) |
	    ((link_caps & IXGBE_LINK_SPEED_10_FULL)    ? 0x8  : 0);

	return speed;
} /* ixgbe_get_default_advertise */

/************************************************************************
 * ixgbe_sysctl_dmac - 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 ixgbe_softc *sc = (struct ixgbe_softc *)arg1;
	if_t ifp = iflib_get_ifp(sc->ctx);
	int error;
	u16 newval;

	newval = sc->dmac;
	error = sysctl_handle_16(oidp, &newval, 0, req);
	if ((error) || (req->newptr == NULL))
		return (error);

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

	/* Re-initialize hardware if it's already running */
	if (if_getdrvflags(ifp) & IFF_DRV_RUNNING)
		if_init(ifp, ifp);

	return (0);
} /* ixgbe_sysctl_dmac */

#ifdef IXGBE_DEBUG
/************************************************************************
 * ixgbe_sysctl_power_state
 *
 *   Sysctl to test power states
 *   Values:
 *     0      - set device to D0
 *     3      - set device to D3
 *     (none) - get current device power state
 ************************************************************************/
static int
ixgbe_sysctl_power_state(SYSCTL_HANDLER_ARGS)
{
	struct ixgbe_softc *sc = (struct ixgbe_softc *)arg1;
	device_t dev = sc->dev;
	int curr_ps, new_ps, error = 0;

	curr_ps = new_ps = pci_get_powerstate(dev);

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

	if (new_ps == curr_ps)
		return (0);

	if (new_ps == 3 && curr_ps == 0)
		error = DEVICE_SUSPEND(dev);
	else if (new_ps == 0 && curr_ps == 3)
		error = DEVICE_RESUME(dev);
	else
		return (EINVAL);

	device_printf(dev, "New state: %d\n", pci_get_powerstate(dev));

	return (error);
} /* ixgbe_sysctl_power_state */
#endif

/************************************************************************
 * ixgbe_sysctl_wol_enable
 *
 *   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 ixgbe_softc  *sc = (struct ixgbe_softc *)arg1;
	struct ixgbe_hw *hw = &sc->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);
	new_wol_enabled = !!(new_wol_enabled);
	if (new_wol_enabled == hw->wol_enabled)
		return (0);

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

	return (0);
} /* ixgbe_sysctl_wol_enable */

/************************************************************************
 * ixgbe_sysctl_wufc - Wake Up Filter Control
 *
 *   Sysctl to enable/disable the types of packets that the
 *   adapter will wake up on upon receipt.
 *   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
 *
 *   Settings not listed above will cause the sysctl to return an error.
 ************************************************************************/
static int
ixgbe_sysctl_wufc(SYSCTL_HANDLER_ARGS)
{
	struct ixgbe_softc *sc = (struct ixgbe_softc *)arg1;
	int error = 0;
	u32 new_wufc;

	new_wufc = sc->wufc;

	error = sysctl_handle_32(oidp, &new_wufc, 0, req);
	if ((error) || (req->newptr == NULL))
		return (error);
	if (new_wufc == sc->wufc)
		return (0);

	if (new_wufc & 0xffffff00)
		return (EINVAL);

	new_wufc &= 0xff;
	new_wufc |= (0xffffff & sc->wufc);
	sc->wufc = new_wufc;

	return (0);
} /* ixgbe_sysctl_wufc */

#ifdef IXGBE_DEBUG
/************************************************************************
 * ixgbe_sysctl_print_rss_config
 ************************************************************************/
static int
ixgbe_sysctl_print_rss_config(SYSCTL_HANDLER_ARGS)
{
	struct ixgbe_softc *sc = (struct ixgbe_softc *)arg1;
	struct ixgbe_hw *hw = &sc->hw;
	device_t dev = sc->dev;
	struct sbuf *buf;
	int error = 0, reta_size;
	u32 reg;

	if (atomic_load_acq_int(&sc->recovery_mode))
		return (EPERM);

	buf = sbuf_new_for_sysctl(NULL, NULL, 128, req);
	if (!buf) {
		device_printf(dev, "Could not allocate sbuf for output.\n");
		return (ENOMEM);
	}

	// TODO: use sbufs to make a string to print out
	/* Set multiplier for RETA setup and table size based on MAC */
	switch (sc->hw.mac.type) {
	case ixgbe_mac_X550:
	case ixgbe_mac_X550EM_x:
	case ixgbe_mac_X550EM_a:
		reta_size = 128;
		break;
	default:
		reta_size = 32;
		break;
	}

	/* Print out the redirection table */
	sbuf_cat(buf, "\n");
	for (int i = 0; i < reta_size; i++) {
		if (i < 32) {
			reg = IXGBE_READ_REG(hw, IXGBE_RETA(i));
			sbuf_printf(buf, "RETA(%2d): 0x%08x\n", i, reg);
		} else {
			reg = IXGBE_READ_REG(hw, IXGBE_ERETA(i - 32));
			sbuf_printf(buf, "ERETA(%2d): 0x%08x\n", i - 32, reg);
		}
	}

	// TODO: print more config

	error = sbuf_finish(buf);
	if (error)
		device_printf(dev, "Error finishing sbuf: %d\n", error);

	sbuf_delete(buf);

	return (0);
} /* ixgbe_sysctl_print_rss_config */
#endif /* IXGBE_DEBUG */

/************************************************************************
 * ixgbe_sysctl_phy_temp - Retrieve temperature of PHY
 *
 *   For X552/X557-AT devices using an external PHY
 ************************************************************************/
static int
ixgbe_sysctl_phy_temp(SYSCTL_HANDLER_ARGS)
{
	struct ixgbe_softc *sc = (struct ixgbe_softc *)arg1;
	struct ixgbe_hw *hw = &sc->hw;
	u16 reg;

	if (atomic_load_acq_int(&sc->recovery_mode))
		return (EPERM);

	if (hw->device_id != IXGBE_DEV_ID_X550EM_X_10G_T) {
		device_printf(iflib_get_dev(sc->ctx),
		    "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(iflib_get_dev(sc->ctx),
		    "Error reading from PHY's current temperature register"
		    "\n");
		return (EAGAIN);
	}

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

	return (sysctl_handle_16(oidp, NULL, reg, req));
} /* ixgbe_sysctl_phy_temp */

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

	if (atomic_load_acq_int(&sc->recovery_mode))
		return (EPERM);

	if (hw->device_id != IXGBE_DEV_ID_X550EM_X_10G_T) {
		device_printf(iflib_get_dev(sc->ctx),
		    "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(iflib_get_dev(sc->ctx),
		    "Error reading from PHY's temperature status register\n");
		return (EAGAIN);
	}

	/* Get occurrence bit */
	reg = !!(reg & 0x4000);

	return (sysctl_handle_16(oidp, 0, reg, req));
} /* ixgbe_sysctl_phy_overtemp_occurred */

/************************************************************************
 * ixgbe_sysctl_eee_state
 *
 *   Sysctl to set EEE power saving feature
 *   Values:
 *     0      - disable EEE
 *     1      - enable EEE
 *     (none) - get current device EEE state
 ************************************************************************/
static int
ixgbe_sysctl_eee_state(SYSCTL_HANDLER_ARGS)
{
	struct ixgbe_softc *sc = (struct ixgbe_softc *)arg1;
	device_t dev = sc->dev;
	if_t ifp = iflib_get_ifp(sc->ctx);
	int curr_eee, new_eee, error = 0;
	s32 retval;

	if (atomic_load_acq_int(&sc->recovery_mode))
		return (EPERM);

	curr_eee = new_eee = !!(sc->feat_en & IXGBE_FEATURE_EEE);

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

	/* Nothing to do */
	if (new_eee == curr_eee)
		return (0);

	/* Not supported */
	if (!(sc->feat_cap & IXGBE_FEATURE_EEE))
		return (EINVAL);

	/* Bounds checking */
	if ((new_eee < 0) || (new_eee > 1))
		return (EINVAL);

	retval = ixgbe_setup_eee(&sc->hw, new_eee);
	if (retval) {
		device_printf(dev, "Error in EEE setup: 0x%08X\n", retval);
		return (EINVAL);
	}

	/* Restart auto-neg */
	if_init(ifp, ifp);

	device_printf(dev, "New EEE state: %d\n", new_eee);

	/* Cache new value */
	if (new_eee)
		sc->feat_en |= IXGBE_FEATURE_EEE;
	else
		sc->feat_en &= ~IXGBE_FEATURE_EEE;

	return (error);
} /* ixgbe_sysctl_eee_state */

static int
ixgbe_sysctl_tso_tcp_flags_mask(SYSCTL_HANDLER_ARGS)
{
	struct ixgbe_softc *sc;
	u32 reg, val, shift;
	int error, mask;

	sc = oidp->oid_arg1;
	switch (oidp->oid_arg2) {
	case 0:
		reg = IXGBE_DTXTCPFLGL;
		shift = 0;
		break;
	case 1:
		reg = IXGBE_DTXTCPFLGL;
		shift = 16;
		break;
	case 2:
		reg = IXGBE_DTXTCPFLGH;
		shift = 0;
		break;
	default:
		return (EINVAL);
		break;
	}
	val = IXGBE_READ_REG(&sc->hw, reg);
	mask = (val >> shift) & 0xfff;
	error = sysctl_handle_int(oidp, &mask, 0, req);
	if (error != 0 || req->newptr == NULL)
		return (error);
	if (mask < 0 || mask > 0xfff)
		return (EINVAL);
	val = (val & ~(0xfff << shift)) | (mask << shift);
	IXGBE_WRITE_REG(&sc->hw, reg, val);
	return (0);
}

/************************************************************************
 * ixgbe_init_device_features
 ************************************************************************/
static void
ixgbe_init_device_features(struct ixgbe_softc *sc)
{
	sc->feat_cap = IXGBE_FEATURE_NETMAP |
	    IXGBE_FEATURE_RSS |
	    IXGBE_FEATURE_MSI |
	    IXGBE_FEATURE_MSIX |
	    IXGBE_FEATURE_LEGACY_IRQ;

	/* Set capabilities first... */
	switch (sc->hw.mac.type) {
	case ixgbe_mac_82598EB:
		if (sc->hw.device_id == IXGBE_DEV_ID_82598AT)
			sc->feat_cap |= IXGBE_FEATURE_FAN_FAIL;
		break;
	case ixgbe_mac_X540:
		sc->feat_cap |= IXGBE_FEATURE_SRIOV;
		sc->feat_cap |= IXGBE_FEATURE_FDIR;
		if ((sc->hw.device_id == IXGBE_DEV_ID_X540_BYPASS) &&
		    (sc->hw.bus.func == 0))
			sc->feat_cap |= IXGBE_FEATURE_BYPASS;
		break;
	case ixgbe_mac_X550:
		sc->feat_cap |= IXGBE_FEATURE_RECOVERY_MODE;
		sc->feat_cap |= IXGBE_FEATURE_TEMP_SENSOR;
		sc->feat_cap |= IXGBE_FEATURE_SRIOV;
		sc->feat_cap |= IXGBE_FEATURE_FDIR;
		break;
	case ixgbe_mac_X550EM_x:
		sc->feat_cap |= IXGBE_FEATURE_RECOVERY_MODE;
		sc->feat_cap |= IXGBE_FEATURE_SRIOV;
		sc->feat_cap |= IXGBE_FEATURE_FDIR;
		if (sc->hw.device_id == IXGBE_DEV_ID_X550EM_X_KR)
			sc->feat_cap |= IXGBE_FEATURE_EEE;
		break;
	case ixgbe_mac_X550EM_a:
		sc->feat_cap |= IXGBE_FEATURE_RECOVERY_MODE;
		sc->feat_cap |= IXGBE_FEATURE_SRIOV;
		sc->feat_cap |= IXGBE_FEATURE_FDIR;
		sc->feat_cap &= ~IXGBE_FEATURE_LEGACY_IRQ;
		if ((sc->hw.device_id == IXGBE_DEV_ID_X550EM_A_1G_T) ||
		    (sc->hw.device_id == IXGBE_DEV_ID_X550EM_A_1G_T_L)) {
			sc->feat_cap |= IXGBE_FEATURE_TEMP_SENSOR;
			sc->feat_cap |= IXGBE_FEATURE_EEE;
		}
		break;
	case ixgbe_mac_82599EB:
		sc->feat_cap |= IXGBE_FEATURE_SRIOV;
		sc->feat_cap |= IXGBE_FEATURE_FDIR;
		if ((sc->hw.device_id == IXGBE_DEV_ID_82599_BYPASS) &&
		    (sc->hw.bus.func == 0))
			sc->feat_cap |= IXGBE_FEATURE_BYPASS;
		if (sc->hw.device_id == IXGBE_DEV_ID_82599_QSFP_SF_QP)
			sc->feat_cap &= ~IXGBE_FEATURE_LEGACY_IRQ;
		break;
	default:
		break;
	}

	/* Enabled by default... */
	/* Fan failure detection */
	if (sc->feat_cap & IXGBE_FEATURE_FAN_FAIL)
		sc->feat_en |= IXGBE_FEATURE_FAN_FAIL;
	/* Netmap */
	if (sc->feat_cap & IXGBE_FEATURE_NETMAP)
		sc->feat_en |= IXGBE_FEATURE_NETMAP;
	/* EEE */
	if (sc->feat_cap & IXGBE_FEATURE_EEE)
		sc->feat_en |= IXGBE_FEATURE_EEE;
	/* Thermal Sensor */
	if (sc->feat_cap & IXGBE_FEATURE_TEMP_SENSOR)
		sc->feat_en |= IXGBE_FEATURE_TEMP_SENSOR;
	/* Recovery mode */
	if (sc->feat_cap & IXGBE_FEATURE_RECOVERY_MODE)
		sc->feat_en |= IXGBE_FEATURE_RECOVERY_MODE;

	/* Enabled via global sysctl... */
	/* Flow Director */
	if (ixgbe_enable_fdir) {
		if (sc->feat_cap & IXGBE_FEATURE_FDIR)
			sc->feat_en |= IXGBE_FEATURE_FDIR;
		else
			device_printf(sc->dev,
			    "Device does not support Flow Director."
			    " Leaving disabled.");
	}
	/*
	 * Message Signal Interrupts - Extended (MSI-X)
	 * Normal MSI is only enabled if MSI-X calls fail.
	 */
	if (!ixgbe_enable_msix)
		sc->feat_cap &= ~IXGBE_FEATURE_MSIX;
	/* Receive-Side Scaling (RSS) */
	if ((sc->feat_cap & IXGBE_FEATURE_RSS) && ixgbe_enable_rss)
		sc->feat_en |= IXGBE_FEATURE_RSS;

	/* Disable features with unmet dependencies... */
	/* No MSI-X */
	if (!(sc->feat_cap & IXGBE_FEATURE_MSIX)) {
		sc->feat_cap &= ~IXGBE_FEATURE_RSS;
		sc->feat_cap &= ~IXGBE_FEATURE_SRIOV;
		sc->feat_en &= ~IXGBE_FEATURE_RSS;
		sc->feat_en &= ~IXGBE_FEATURE_SRIOV;
	}
} /* ixgbe_init_device_features */

/************************************************************************
 * ixgbe_check_fan_failure
 ************************************************************************/
static void
ixgbe_check_fan_failure(struct ixgbe_softc *sc, u32 reg, bool in_interrupt)
{
	u32 mask;

	mask = (in_interrupt) ? IXGBE_EICR_GPI_SDP1_BY_MAC(&sc->hw) :
	    IXGBE_ESDP_SDP1;

	if (reg & mask)
		device_printf(sc->dev,
		    "\nCRITICAL: FAN FAILURE!! REPLACE IMMEDIATELY!!\n");
} /* ixgbe_check_fan_failure */

/************************************************************************
 * ixgbe_sbuf_fw_version
 ************************************************************************/
static void
ixgbe_sbuf_fw_version(struct ixgbe_hw *hw, struct sbuf *buf)
{
	struct ixgbe_nvm_version nvm_ver = {0};
	const char *space = "";

	ixgbe_get_nvm_version(hw, &nvm_ver); /* NVM version */
	ixgbe_get_oem_prod_version(hw, &nvm_ver); /* OEM's NVM version */
	ixgbe_get_etk_id(hw, &nvm_ver); /* eTrack a build ID in Intel's SCM */
	ixgbe_get_orom_version(hw, &nvm_ver); /* Option ROM */

	/* FW version */
	if ((nvm_ver.phy_fw_maj == 0x0 &&
	    nvm_ver.phy_fw_min == 0x0 &&
	    nvm_ver.phy_fw_id == 0x0) ||
		(nvm_ver.phy_fw_maj == 0xF &&
	    nvm_ver.phy_fw_min == 0xFF &&
	    nvm_ver.phy_fw_id == 0xF)) {
		/* If major, minor and id numbers are set to 0,
		 * reading FW version is unsupported. If major number
		 * is set to 0xF, minor is set to 0xFF and id is set
		 * to 0xF, this means that number read is invalid. */
	} else
		sbuf_printf(buf, "fw %d.%d.%d ",
		    nvm_ver.phy_fw_maj, nvm_ver.phy_fw_min,
		    nvm_ver.phy_fw_id);

	/* NVM version */
	if ((nvm_ver.nvm_major == 0x0 &&
	    nvm_ver.nvm_minor == 0x0 &&
	    nvm_ver.nvm_id == 0x0) ||
		(nvm_ver.nvm_major == 0xF &&
	    nvm_ver.nvm_minor == 0xFF &&
	    nvm_ver.nvm_id == 0xF)) {
		/* If major, minor and id numbers are set to 0,
		 * reading NVM version is unsupported. If major number
		 * is set to 0xF, minor is set to 0xFF and id is set
		 * to 0xF, this means that number read is invalid. */
	} else
		sbuf_printf(buf, "nvm %x.%02x.%x ",
		    nvm_ver.nvm_major, nvm_ver.nvm_minor, nvm_ver.nvm_id);

	if (nvm_ver.oem_valid) {
		sbuf_printf(buf, "NVM OEM V%d.%d R%d", nvm_ver.oem_major,
		    nvm_ver.oem_minor, nvm_ver.oem_release);
		space = " ";
	}

	if (nvm_ver.or_valid) {
		sbuf_printf(buf, "%sOption ROM V%d-b%d-p%d",
		    space, nvm_ver.or_major, nvm_ver.or_build,
		    nvm_ver.or_patch);
		space = " ";
	}

	if (nvm_ver.etk_id != ((NVM_VER_INVALID << NVM_ETK_SHIFT) |
	    NVM_VER_INVALID | 0xFFFFFFFF)) {
		sbuf_printf(buf, "%seTrack 0x%08x", space, nvm_ver.etk_id);
	}
} /* ixgbe_sbuf_fw_version */

/************************************************************************
 * ixgbe_print_fw_version
 ************************************************************************/
static void
ixgbe_print_fw_version(if_ctx_t ctx)
{
	struct ixgbe_softc *sc = iflib_get_softc(ctx);
	struct ixgbe_hw *hw = &sc->hw;
	device_t dev = sc->dev;
	struct sbuf *buf;
	int error = 0;

	buf = sbuf_new_auto();
	if (!buf) {
		device_printf(dev, "Could not allocate sbuf for output.\n");
		return;
	}

	ixgbe_sbuf_fw_version(hw, buf);

	error = sbuf_finish(buf);
	if (error)
		device_printf(dev, "Error finishing sbuf: %d\n", error);
	else if (sbuf_len(buf))
		device_printf(dev, "%s\n", sbuf_data(buf));

	sbuf_delete(buf);
} /* ixgbe_print_fw_version */

/************************************************************************
 * ixgbe_sysctl_print_fw_version
 ************************************************************************/
static int
ixgbe_sysctl_print_fw_version(SYSCTL_HANDLER_ARGS)
{
	struct ixgbe_softc *sc = (struct ixgbe_softc *)arg1;
	struct ixgbe_hw *hw = &sc->hw;
	device_t dev = sc->dev;
	struct sbuf *buf;
	int error = 0;

	buf = sbuf_new_for_sysctl(NULL, NULL, 128, req);
	if (!buf) {
		device_printf(dev, "Could not allocate sbuf for output.\n");
		return (ENOMEM);
	}

	ixgbe_sbuf_fw_version(hw, buf);

	error = sbuf_finish(buf);
	if (error)
		device_printf(dev, "Error finishing sbuf: %d\n", error);

	sbuf_delete(buf);

	return (0);
} /* ixgbe_sysctl_print_fw_version */