efi: Change down_interruptible() in virt_efi_reset_system() to down_trylock()

[mirror_ubuntu-jammy-kernel.git] / drivers / net / ethernet / intel / ixgbe / ixgbe_main.c

// SPDX-License-Identifier: GPL-2.0
/* Copyright(c) 1999 - 2018 Intel Corporation. */

#include <linux/types.h>
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/netdevice.h>
#include <linux/vmalloc.h>
#include <linux/string.h>
#include <linux/in.h>
#include <linux/interrupt.h>
#include <linux/ip.h>
#include <linux/tcp.h>
#include <linux/sctp.h>
#include <linux/pkt_sched.h>
#include <linux/ipv6.h>
#include <linux/slab.h>
#include <net/checksum.h>
#include <net/ip6_checksum.h>
#include <linux/etherdevice.h>
#include <linux/ethtool.h>
#include <linux/if.h>
#include <linux/if_vlan.h>
#include <linux/if_macvlan.h>
#include <linux/if_bridge.h>
#include <linux/prefetch.h>
#include <linux/bpf.h>
#include <linux/bpf_trace.h>
#include <linux/atomic.h>
#include <linux/numa.h>
#include <generated/utsrelease.h>
#include <scsi/fc/fc_fcoe.h>
#include <net/udp_tunnel.h>
#include <net/pkt_cls.h>
#include <net/tc_act/tc_gact.h>
#include <net/tc_act/tc_mirred.h>
#include <net/vxlan.h>
#include <net/mpls.h>
#include <net/xdp_sock_drv.h>
#include <net/xfrm.h>

#include "ixgbe.h"
#include "ixgbe_common.h"
#include "ixgbe_dcb_82599.h"
#include "ixgbe_phy.h"
#include "ixgbe_sriov.h"
#include "ixgbe_model.h"
#include "ixgbe_txrx_common.h"

char ixgbe_driver_name[] = "ixgbe";
static const char ixgbe_driver_string[] =
                              "Intel(R) 10 Gigabit PCI Express Network Driver";
#ifdef IXGBE_FCOE
char ixgbe_default_device_descr[] =
                              "Intel(R) 10 Gigabit Network Connection";
#else
static char ixgbe_default_device_descr[] =
                              "Intel(R) 10 Gigabit Network Connection";
#endif
static const char ixgbe_copyright[] =
                                "Copyright (c) 1999-2016 Intel Corporation.";

static const char ixgbe_overheat_msg[] = "Network adapter has been stopped because it has over heated. Restart the computer. If the problem persists, power off the system and replace the adapter";

static const struct ixgbe_info *ixgbe_info_tbl[] = {
        [board_82598]           = &ixgbe_82598_info,
        [board_82599]           = &ixgbe_82599_info,
        [board_X540]            = &ixgbe_X540_info,
        [board_X550]            = &ixgbe_X550_info,
        [board_X550EM_x]        = &ixgbe_X550EM_x_info,
        [board_x550em_x_fw]     = &ixgbe_x550em_x_fw_info,
        [board_x550em_a]        = &ixgbe_x550em_a_info,
        [board_x550em_a_fw]     = &ixgbe_x550em_a_fw_info,
};

/* ixgbe_pci_tbl - PCI Device ID Table
 *
 * Wildcard entries (PCI_ANY_ID) should come last
 * Last entry must be all 0s
 *
 * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
 *   Class, Class Mask, private data (not used) }
 */
static const struct pci_device_id ixgbe_pci_tbl[] = {
        {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598), board_82598 },
        {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AF_DUAL_PORT), board_82598 },
        {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AF_SINGLE_PORT), board_82598 },
        {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AT), board_82598 },
        {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AT2), board_82598 },
        {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598EB_CX4), board_82598 },
        {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598_CX4_DUAL_PORT), board_82598 },
        {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598_DA_DUAL_PORT), board_82598 },
        {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598_SR_DUAL_PORT_EM), board_82598 },
        {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598EB_XF_LR), board_82598 },
        {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598EB_SFP_LOM), board_82598 },
        {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598_BX), board_82598 },
        {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_KX4), board_82599 },
        {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_XAUI_LOM), board_82599 },
        {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_KR), board_82599 },
        {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_SFP), board_82599 },
        {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_SFP_EM), board_82599 },
        {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_KX4_MEZZ), board_82599 },
        {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_CX4), board_82599 },
        {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_BACKPLANE_FCOE), board_82599 },
        {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_SFP_FCOE), board_82599 },
        {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_T3_LOM), board_82599 },
        {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_COMBO_BACKPLANE), board_82599 },
        {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X540T), board_X540 },
        {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_SFP_SF2), board_82599 },
        {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_LS), board_82599 },
        {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_QSFP_SF_QP), board_82599 },
        {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599EN_SFP), board_82599 },
        {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_SFP_SF_QP), board_82599 },
        {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X540T1), board_X540 },
        {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X550T), board_X550},
        {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X550T1), board_X550},
        {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X550EM_X_KX4), board_X550EM_x},
        {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X550EM_X_XFI), board_X550EM_x},
        {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X550EM_X_KR), board_X550EM_x},
        {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X550EM_X_10G_T), board_X550EM_x},
        {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X550EM_X_SFP), board_X550EM_x},
        {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X550EM_X_1G_T), board_x550em_x_fw},
        {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X550EM_A_KR), board_x550em_a },
        {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X550EM_A_KR_L), board_x550em_a },
        {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X550EM_A_SFP_N), board_x550em_a },
        {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X550EM_A_SGMII), board_x550em_a },
        {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X550EM_A_SGMII_L), board_x550em_a },
        {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X550EM_A_10G_T), board_x550em_a},
        {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X550EM_A_SFP), board_x550em_a },
        {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X550EM_A_1G_T), board_x550em_a_fw },
        {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X550EM_A_1G_T_L), board_x550em_a_fw },
        /* required last entry */
        {0, }
};
MODULE_DEVICE_TABLE(pci, ixgbe_pci_tbl);

#ifdef CONFIG_IXGBE_DCA
static int ixgbe_notify_dca(struct notifier_block *, unsigned long event,
                            void *p);
static struct notifier_block dca_notifier = {
        .notifier_call = ixgbe_notify_dca,
        .next          = NULL,
        .priority      = 0
};
#endif

#ifdef CONFIG_PCI_IOV
static unsigned int max_vfs;
module_param(max_vfs, uint, 0);
MODULE_PARM_DESC(max_vfs,
                 "Maximum number of virtual functions to allocate per physical function - default is zero and maximum value is 63. (Deprecated)");
#endif /* CONFIG_PCI_IOV */

static unsigned int allow_unsupported_sfp;
module_param(allow_unsupported_sfp, uint, 0);
MODULE_PARM_DESC(allow_unsupported_sfp,
                 "Allow unsupported and untested SFP+ modules on 82599-based adapters");

#define DEFAULT_MSG_ENABLE (NETIF_MSG_DRV|NETIF_MSG_PROBE|NETIF_MSG_LINK)
static int debug = -1;
module_param(debug, int, 0);
MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");

MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
MODULE_DESCRIPTION("Intel(R) 10 Gigabit PCI Express Network Driver");
MODULE_LICENSE("GPL v2");

static struct workqueue_struct *ixgbe_wq;

static bool ixgbe_check_cfg_remove(struct ixgbe_hw *hw, struct pci_dev *pdev);
static void ixgbe_watchdog_link_is_down(struct ixgbe_adapter *);

static const struct net_device_ops ixgbe_netdev_ops;

static bool netif_is_ixgbe(struct net_device *dev)
{
        return dev && (dev->netdev_ops == &ixgbe_netdev_ops);
}

static int ixgbe_read_pci_cfg_word_parent(struct ixgbe_adapter *adapter,
                                          u32 reg, u16 *value)
{
        struct pci_dev *parent_dev;
        struct pci_bus *parent_bus;

        parent_bus = adapter->pdev->bus->parent;
        if (!parent_bus)
                return -1;

        parent_dev = parent_bus->self;
        if (!parent_dev)
                return -1;

        if (!pci_is_pcie(parent_dev))
                return -1;

        pcie_capability_read_word(parent_dev, reg, value);
        if (*value == IXGBE_FAILED_READ_CFG_WORD &&
            ixgbe_check_cfg_remove(&adapter->hw, parent_dev))
                return -1;
        return 0;
}

static s32 ixgbe_get_parent_bus_info(struct ixgbe_adapter *adapter)
{
        struct ixgbe_hw *hw = &adapter->hw;
        u16 link_status = 0;
        int err;

        hw->bus.type = ixgbe_bus_type_pci_express;

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

        /* assume caller will handle error case */
        if (err)
                return err;

        hw->bus.width = ixgbe_convert_bus_width(link_status);
        hw->bus.speed = ixgbe_convert_bus_speed(link_status);

        return 0;
}

/**
 * ixgbe_pcie_from_parent - Determine whether PCIe info should come from parent
 * @hw: hw specific details
 *
 * This function is used by probe to determine whether a device's PCI-Express
 * bandwidth details should be gathered from the parent bus instead of from the
 * device. Used to ensure that various locations all have the correct device ID
 * checks.
 */
static inline bool ixgbe_pcie_from_parent(struct ixgbe_hw *hw)
{
        switch (hw->device_id) {
        case IXGBE_DEV_ID_82599_SFP_SF_QP:
        case IXGBE_DEV_ID_82599_QSFP_SF_QP:
                return true;
        default:
                return false;
        }
}

static void ixgbe_check_minimum_link(struct ixgbe_adapter *adapter,
                                     int expected_gts)
{
        struct ixgbe_hw *hw = &adapter->hw;
        struct pci_dev *pdev;

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

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

        pcie_print_link_status(pdev);
}

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

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

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

static u32 ixgbe_check_remove(struct ixgbe_hw *hw, u32 reg)
{
        u8 __iomem *reg_addr;
        u32 value;
        int i;

        reg_addr = READ_ONCE(hw->hw_addr);
        if (ixgbe_removed(reg_addr))
                return IXGBE_FAILED_READ_REG;

        /* Register read of 0xFFFFFFF can indicate the adapter has been removed,
         * so perform several status register reads to determine if the adapter
         * has been removed.
         */
        for (i = 0; i < IXGBE_FAILED_READ_RETRIES; i++) {
                value = readl(reg_addr + IXGBE_STATUS);
                if (value != IXGBE_FAILED_READ_REG)
                        break;
                mdelay(3);
        }

        if (value == IXGBE_FAILED_READ_REG)
                ixgbe_remove_adapter(hw);
        else
                value = readl(reg_addr + reg);
        return value;
}

/**
 * ixgbe_read_reg - Read from device register
 * @hw: hw specific details
 * @reg: offset of register to read
 *
 * Returns : value read or IXGBE_FAILED_READ_REG if removed
 *
 * This function is used to read device registers. It checks for device
 * removal by confirming any read that returns all ones by checking the
 * status register value for all ones. This function avoids reading from
 * the hardware if a removal was previously detected in which case it
 * returns IXGBE_FAILED_READ_REG (all ones).
 */
u32 ixgbe_read_reg(struct ixgbe_hw *hw, u32 reg)
{
        u8 __iomem *reg_addr = READ_ONCE(hw->hw_addr);
        u32 value;

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

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

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

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

static bool ixgbe_check_cfg_remove(struct ixgbe_hw *hw, struct pci_dev *pdev)
{
        u16 value;

        pci_read_config_word(pdev, PCI_VENDOR_ID, &value);
        if (value == IXGBE_FAILED_READ_CFG_WORD) {
                ixgbe_remove_adapter(hw);
                return true;
        }
        return false;
}

u16 ixgbe_read_pci_cfg_word(struct ixgbe_hw *hw, u32 reg)
{
        struct ixgbe_adapter *adapter = hw->back;
        u16 value;

        if (ixgbe_removed(hw->hw_addr))
                return IXGBE_FAILED_READ_CFG_WORD;
        pci_read_config_word(adapter->pdev, reg, &value);
        if (value == IXGBE_FAILED_READ_CFG_WORD &&
            ixgbe_check_cfg_remove(hw, adapter->pdev))
                return IXGBE_FAILED_READ_CFG_WORD;
        return value;
}

#ifdef CONFIG_PCI_IOV
static u32 ixgbe_read_pci_cfg_dword(struct ixgbe_hw *hw, u32 reg)
{
        struct ixgbe_adapter *adapter = hw->back;
        u32 value;

        if (ixgbe_removed(hw->hw_addr))
                return IXGBE_FAILED_READ_CFG_DWORD;
        pci_read_config_dword(adapter->pdev, reg, &value);
        if (value == IXGBE_FAILED_READ_CFG_DWORD &&
            ixgbe_check_cfg_remove(hw, adapter->pdev))
                return IXGBE_FAILED_READ_CFG_DWORD;
        return value;
}
#endif /* CONFIG_PCI_IOV */

void ixgbe_write_pci_cfg_word(struct ixgbe_hw *hw, u32 reg, u16 value)
{
        struct ixgbe_adapter *adapter = hw->back;

        if (ixgbe_removed(hw->hw_addr))
                return;
        pci_write_config_word(adapter->pdev, reg, value);
}

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

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

struct ixgbe_reg_info {
        u32 ofs;
        char *name;
};

static const struct ixgbe_reg_info ixgbe_reg_info_tbl[] = {

        /* General Registers */
        {IXGBE_CTRL, "CTRL"},
        {IXGBE_STATUS, "STATUS"},
        {IXGBE_CTRL_EXT, "CTRL_EXT"},

        /* Interrupt Registers */
        {IXGBE_EICR, "EICR"},

        /* RX Registers */
        {IXGBE_SRRCTL(0), "SRRCTL"},
        {IXGBE_DCA_RXCTRL(0), "DRXCTL"},
        {IXGBE_RDLEN(0), "RDLEN"},
        {IXGBE_RDH(0), "RDH"},
        {IXGBE_RDT(0), "RDT"},
        {IXGBE_RXDCTL(0), "RXDCTL"},
        {IXGBE_RDBAL(0), "RDBAL"},
        {IXGBE_RDBAH(0), "RDBAH"},

        /* TX Registers */
        {IXGBE_TDBAL(0), "TDBAL"},
        {IXGBE_TDBAH(0), "TDBAH"},
        {IXGBE_TDLEN(0), "TDLEN"},
        {IXGBE_TDH(0), "TDH"},
        {IXGBE_TDT(0), "TDT"},
        {IXGBE_TXDCTL(0), "TXDCTL"},

        /* List Terminator */
        { .name = NULL }
};


/*
 * ixgbe_regdump - register printout routine
 */
static void ixgbe_regdump(struct ixgbe_hw *hw, struct ixgbe_reg_info *reginfo)
{
        int i;
        char rname[16];
        u32 regs[64];

        switch (reginfo->ofs) {
        case IXGBE_SRRCTL(0):
                for (i = 0; i < 64; i++)
                        regs[i] = IXGBE_READ_REG(hw, IXGBE_SRRCTL(i));
                break;
        case IXGBE_DCA_RXCTRL(0):
                for (i = 0; i < 64; i++)
                        regs[i] = IXGBE_READ_REG(hw, IXGBE_DCA_RXCTRL(i));
                break;
        case IXGBE_RDLEN(0):
                for (i = 0; i < 64; i++)
                        regs[i] = IXGBE_READ_REG(hw, IXGBE_RDLEN(i));
                break;
        case IXGBE_RDH(0):
                for (i = 0; i < 64; i++)
                        regs[i] = IXGBE_READ_REG(hw, IXGBE_RDH(i));
                break;
        case IXGBE_RDT(0):
                for (i = 0; i < 64; i++)
                        regs[i] = IXGBE_READ_REG(hw, IXGBE_RDT(i));
                break;
        case IXGBE_RXDCTL(0):
                for (i = 0; i < 64; i++)
                        regs[i] = IXGBE_READ_REG(hw, IXGBE_RXDCTL(i));
                break;
        case IXGBE_RDBAL(0):
                for (i = 0; i < 64; i++)
                        regs[i] = IXGBE_READ_REG(hw, IXGBE_RDBAL(i));
                break;
        case IXGBE_RDBAH(0):
                for (i = 0; i < 64; i++)
                        regs[i] = IXGBE_READ_REG(hw, IXGBE_RDBAH(i));
                break;
        case IXGBE_TDBAL(0):
                for (i = 0; i < 64; i++)
                        regs[i] = IXGBE_READ_REG(hw, IXGBE_TDBAL(i));
                break;
        case IXGBE_TDBAH(0):
                for (i = 0; i < 64; i++)
                        regs[i] = IXGBE_READ_REG(hw, IXGBE_TDBAH(i));
                break;
        case IXGBE_TDLEN(0):
                for (i = 0; i < 64; i++)
                        regs[i] = IXGBE_READ_REG(hw, IXGBE_TDLEN(i));
                break;
        case IXGBE_TDH(0):
                for (i = 0; i < 64; i++)
                        regs[i] = IXGBE_READ_REG(hw, IXGBE_TDH(i));
                break;
        case IXGBE_TDT(0):
                for (i = 0; i < 64; i++)
                        regs[i] = IXGBE_READ_REG(hw, IXGBE_TDT(i));
                break;
        case IXGBE_TXDCTL(0):
                for (i = 0; i < 64; i++)
                        regs[i] = IXGBE_READ_REG(hw, IXGBE_TXDCTL(i));
                break;
        default:
                pr_info("%-15s %08x\n",
                        reginfo->name, IXGBE_READ_REG(hw, reginfo->ofs));
                return;
        }

        i = 0;
        while (i < 64) {
                int j;
                char buf[9 * 8 + 1];
                char *p = buf;

                snprintf(rname, 16, "%s[%d-%d]", reginfo->name, i, i + 7);
                for (j = 0; j < 8; j++)
                        p += sprintf(p, " %08x", regs[i++]);
                pr_err("%-15s%s\n", rname, buf);
        }

}

static void ixgbe_print_buffer(struct ixgbe_ring *ring, int n)
{
        struct ixgbe_tx_buffer *tx_buffer;

        tx_buffer = &ring->tx_buffer_info[ring->next_to_clean];
        pr_info(" %5d %5X %5X %016llX %08X %p %016llX\n",
                n, ring->next_to_use, ring->next_to_clean,
                (u64)dma_unmap_addr(tx_buffer, dma),
                dma_unmap_len(tx_buffer, len),
                tx_buffer->next_to_watch,
                (u64)tx_buffer->time_stamp);
}

/*
 * ixgbe_dump - Print registers, tx-rings and rx-rings
 */
static void ixgbe_dump(struct ixgbe_adapter *adapter)
{
        struct net_device *netdev = adapter->netdev;
        struct ixgbe_hw *hw = &adapter->hw;
        struct ixgbe_reg_info *reginfo;
        int n = 0;
        struct ixgbe_ring *ring;
        struct ixgbe_tx_buffer *tx_buffer;
        union ixgbe_adv_tx_desc *tx_desc;
        struct my_u0 { u64 a; u64 b; } *u0;
        struct ixgbe_ring *rx_ring;
        union ixgbe_adv_rx_desc *rx_desc;
        struct ixgbe_rx_buffer *rx_buffer_info;
        int i = 0;

        if (!netif_msg_hw(adapter))
                return;

        /* Print netdevice Info */
        if (netdev) {
                dev_info(&adapter->pdev->dev, "Net device Info\n");
                pr_info("Device Name     state            "
                        "trans_start\n");
                pr_info("%-15s %016lX %016lX\n",
                        netdev->name,
                        netdev->state,
                        dev_trans_start(netdev));
        }

        /* Print Registers */
        dev_info(&adapter->pdev->dev, "Register Dump\n");
        pr_info(" Register Name   Value\n");
        for (reginfo = (struct ixgbe_reg_info *)ixgbe_reg_info_tbl;
             reginfo->name; reginfo++) {
                ixgbe_regdump(hw, reginfo);
        }

        /* Print TX Ring Summary */
        if (!netdev || !netif_running(netdev))
                return;

        dev_info(&adapter->pdev->dev, "TX Rings Summary\n");
        pr_info(" %s     %s              %s        %s\n",
                "Queue [NTU] [NTC] [bi(ntc)->dma  ]",
                "leng", "ntw", "timestamp");
        for (n = 0; n < adapter->num_tx_queues; n++) {
                ring = adapter->tx_ring[n];
                ixgbe_print_buffer(ring, n);
        }

        for (n = 0; n < adapter->num_xdp_queues; n++) {
                ring = adapter->xdp_ring[n];
                ixgbe_print_buffer(ring, n);
        }

        /* Print TX Rings */
        if (!netif_msg_tx_done(adapter))
                goto rx_ring_summary;

        dev_info(&adapter->pdev->dev, "TX Rings Dump\n");

        /* Transmit Descriptor Formats
         *
         * 82598 Advanced Transmit Descriptor
         *   +--------------------------------------------------------------+
         * 0 |         Buffer Address [63:0]                                |
         *   +--------------------------------------------------------------+
         * 8 |  PAYLEN  | POPTS  | IDX | STA | DCMD  |DTYP |  RSV |  DTALEN |
         *   +--------------------------------------------------------------+
         *   63       46 45    40 39 36 35 32 31   24 23 20 19              0
         *
         * 82598 Advanced Transmit Descriptor (Write-Back Format)
         *   +--------------------------------------------------------------+
         * 0 |                          RSV [63:0]                          |
         *   +--------------------------------------------------------------+
         * 8 |            RSV           |  STA  |          NXTSEQ           |
         *   +--------------------------------------------------------------+
         *   63                       36 35   32 31                         0
         *
         * 82599+ Advanced Transmit Descriptor
         *   +--------------------------------------------------------------+
         * 0 |         Buffer Address [63:0]                                |
         *   +--------------------------------------------------------------+
         * 8 |PAYLEN  |POPTS|CC|IDX  |STA  |DCMD  |DTYP |MAC  |RSV  |DTALEN |
         *   +--------------------------------------------------------------+
         *   63     46 45 40 39 38 36 35 32 31  24 23 20 19 18 17 16 15     0
         *
         * 82599+ Advanced Transmit Descriptor (Write-Back Format)
         *   +--------------------------------------------------------------+
         * 0 |                          RSV [63:0]                          |
         *   +--------------------------------------------------------------+
         * 8 |            RSV           |  STA  |           RSV             |
         *   +--------------------------------------------------------------+
         *   63                       36 35   32 31                         0
         */

        for (n = 0; n < adapter->num_tx_queues; n++) {
                ring = adapter->tx_ring[n];
                pr_info("------------------------------------\n");
                pr_info("TX QUEUE INDEX = %d\n", ring->queue_index);
                pr_info("------------------------------------\n");
                pr_info("%s%s    %s              %s        %s          %s\n",
                        "T [desc]     [address 63:0  ] ",
                        "[PlPOIdStDDt Ln] [bi->dma       ] ",
                        "leng", "ntw", "timestamp", "bi->skb");

                for (i = 0; ring->desc && (i < ring->count); i++) {
                        tx_desc = IXGBE_TX_DESC(ring, i);
                        tx_buffer = &ring->tx_buffer_info[i];
                        u0 = (struct my_u0 *)tx_desc;
                        if (dma_unmap_len(tx_buffer, len) > 0) {
                                const char *ring_desc;

                                if (i == ring->next_to_use &&
                                    i == ring->next_to_clean)
                                        ring_desc = " NTC/U";
                                else if (i == ring->next_to_use)
                                        ring_desc = " NTU";
                                else if (i == ring->next_to_clean)
                                        ring_desc = " NTC";
                                else
                                        ring_desc = "";
                                pr_info("T [0x%03X]    %016llX %016llX %016llX %08X %p %016llX %p%s",
                                        i,
                                        le64_to_cpu((__force __le64)u0->a),
                                        le64_to_cpu((__force __le64)u0->b),
                                        (u64)dma_unmap_addr(tx_buffer, dma),
                                        dma_unmap_len(tx_buffer, len),
                                        tx_buffer->next_to_watch,
                                        (u64)tx_buffer->time_stamp,
                                        tx_buffer->skb,
                                        ring_desc);

                                if (netif_msg_pktdata(adapter) &&
                                    tx_buffer->skb)
                                        print_hex_dump(KERN_INFO, "",
                                                DUMP_PREFIX_ADDRESS, 16, 1,
                                                tx_buffer->skb->data,
                                                dma_unmap_len(tx_buffer, len),
                                                true);
                        }
                }
        }

        /* Print RX Rings Summary */
rx_ring_summary:
        dev_info(&adapter->pdev->dev, "RX Rings Summary\n");
        pr_info("Queue [NTU] [NTC]\n");
        for (n = 0; n < adapter->num_rx_queues; n++) {
                rx_ring = adapter->rx_ring[n];
                pr_info("%5d %5X %5X\n",
                        n, rx_ring->next_to_use, rx_ring->next_to_clean);
        }

        /* Print RX Rings */
        if (!netif_msg_rx_status(adapter))
                return;

        dev_info(&adapter->pdev->dev, "RX Rings Dump\n");

        /* Receive Descriptor Formats
         *
         * 82598 Advanced Receive Descriptor (Read) Format
         *    63                                           1        0
         *    +-----------------------------------------------------+
         *  0 |       Packet Buffer Address [63:1]           |A0/NSE|
         *    +----------------------------------------------+------+
         *  8 |       Header Buffer Address [63:1]           |  DD  |
         *    +-----------------------------------------------------+
         *
         *
         * 82598 Advanced Receive Descriptor (Write-Back) Format
         *
         *   63       48 47    32 31  30      21 20 16 15   4 3     0
         *   +------------------------------------------------------+
         * 0 |       RSS Hash /  |SPH| HDR_LEN  | RSV |Packet|  RSS |
         *   | Packet   | IP     |   |          |     | Type | Type |
         *   | Checksum | Ident  |   |          |     |      |      |
         *   +------------------------------------------------------+
         * 8 | VLAN Tag | Length | Extended Error | Extended Status |
         *   +------------------------------------------------------+
         *   63       48 47    32 31            20 19               0
         *
         * 82599+ Advanced Receive Descriptor (Read) Format
         *    63                                           1        0
         *    +-----------------------------------------------------+
         *  0 |       Packet Buffer Address [63:1]           |A0/NSE|
         *    +----------------------------------------------+------+
         *  8 |       Header Buffer Address [63:1]           |  DD  |
         *    +-----------------------------------------------------+
         *
         *
         * 82599+ Advanced Receive Descriptor (Write-Back) Format
         *
         *   63       48 47    32 31  30      21 20 17 16   4 3     0
         *   +------------------------------------------------------+
         * 0 |RSS / Frag Checksum|SPH| HDR_LEN  |RSC- |Packet|  RSS |
         *   |/ RTT / PCoE_PARAM |   |          | CNT | Type | Type |
         *   |/ Flow Dir Flt ID  |   |          |     |      |      |
         *   +------------------------------------------------------+
         * 8 | VLAN Tag | Length |Extended Error| Xtnd Status/NEXTP |
         *   +------------------------------------------------------+
         *   63       48 47    32 31          20 19                 0
         */

        for (n = 0; n < adapter->num_rx_queues; n++) {
                rx_ring = adapter->rx_ring[n];
                pr_info("------------------------------------\n");
                pr_info("RX QUEUE INDEX = %d\n", rx_ring->queue_index);
                pr_info("------------------------------------\n");
                pr_info("%s%s%s\n",
                        "R  [desc]      [ PktBuf     A0] ",
                        "[  HeadBuf   DD] [bi->dma       ] [bi->skb       ] ",
                        "<-- Adv Rx Read format");
                pr_info("%s%s%s\n",
                        "RWB[desc]      [PcsmIpSHl PtRs] ",
                        "[vl er S cks ln] ---------------- [bi->skb       ] ",
                        "<-- Adv Rx Write-Back format");

                for (i = 0; i < rx_ring->count; i++) {
                        const char *ring_desc;

                        if (i == rx_ring->next_to_use)
                                ring_desc = " NTU";
                        else if (i == rx_ring->next_to_clean)
                                ring_desc = " NTC";
                        else
                                ring_desc = "";

                        rx_buffer_info = &rx_ring->rx_buffer_info[i];
                        rx_desc = IXGBE_RX_DESC(rx_ring, i);
                        u0 = (struct my_u0 *)rx_desc;
                        if (rx_desc->wb.upper.length) {
                                /* Descriptor Done */
                                pr_info("RWB[0x%03X]     %016llX %016llX ---------------- %p%s\n",
                                        i,
                                        le64_to_cpu((__force __le64)u0->a),
                                        le64_to_cpu((__force __le64)u0->b),
                                        rx_buffer_info->skb,
                                        ring_desc);
                        } else {
                                pr_info("R  [0x%03X]     %016llX %016llX %016llX %p%s\n",
                                        i,
                                        le64_to_cpu((__force __le64)u0->a),
                                        le64_to_cpu((__force __le64)u0->b),
                                        (u64)rx_buffer_info->dma,
                                        rx_buffer_info->skb,
                                        ring_desc);

                                if (netif_msg_pktdata(adapter) &&
                                    rx_buffer_info->dma) {
                                        print_hex_dump(KERN_INFO, "",
                                           DUMP_PREFIX_ADDRESS, 16, 1,
                                           page_address(rx_buffer_info->page) +
                                                    rx_buffer_info->page_offset,
                                           ixgbe_rx_bufsz(rx_ring), true);
                                }
                        }
                }
        }
}

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

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

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

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

/**
 * ixgbe_set_ivar - set the IVAR registers, mapping interrupt causes to vectors
 * @adapter: pointer to adapter struct
 * @direction: 0 for Rx, 1 for Tx, -1 for other causes
 * @queue: queue to map the corresponding interrupt to
 * @msix_vector: the vector to map to the corresponding queue
 *
 */
static void ixgbe_set_ivar(struct ixgbe_adapter *adapter, s8 direction,
                           u8 queue, u8 msix_vector)
{
        u32 ivar, index;
        struct ixgbe_hw *hw = &adapter->hw;
        switch (hw->mac.type) {
        case ixgbe_mac_82598EB:
                msix_vector |= IXGBE_IVAR_ALLOC_VAL;
                if (direction == -1)
                        direction = 0;
                index = (((direction * 64) + queue) >> 2) & 0x1F;
                ivar = IXGBE_READ_REG(hw, IXGBE_IVAR(index));
                ivar &= ~(0xFF << (8 * (queue & 0x3)));
                ivar |= (msix_vector << (8 * (queue & 0x3)));
                IXGBE_WRITE_REG(hw, IXGBE_IVAR(index), ivar);
                break;
        case ixgbe_mac_82599EB:
        case ixgbe_mac_X540:
        case ixgbe_mac_X550:
        case ixgbe_mac_X550EM_x:
        case ixgbe_mac_x550em_a:
                if (direction == -1) {
                        /* other causes */
                        msix_vector |= IXGBE_IVAR_ALLOC_VAL;
                        index = ((queue & 1) * 8);
                        ivar = IXGBE_READ_REG(&adapter->hw, IXGBE_IVAR_MISC);
                        ivar &= ~(0xFF << index);
                        ivar |= (msix_vector << index);
                        IXGBE_WRITE_REG(&adapter->hw, IXGBE_IVAR_MISC, ivar);
                        break;
                } else {
                        /* tx or rx causes */
                        msix_vector |= IXGBE_IVAR_ALLOC_VAL;
                        index = ((16 * (queue & 1)) + (8 * direction));
                        ivar = IXGBE_READ_REG(hw, IXGBE_IVAR(queue >> 1));
                        ivar &= ~(0xFF << index);
                        ivar |= (msix_vector << index);
                        IXGBE_WRITE_REG(hw, IXGBE_IVAR(queue >> 1), ivar);
                        break;
                }
        default:
                break;
        }
}

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

        switch (adapter->hw.mac.type) {
        case ixgbe_mac_82598EB:
                mask = (IXGBE_EIMS_RTX_QUEUE & qmask);
                IXGBE_WRITE_REG(&adapter->hw, IXGBE_EICS, mask);
                break;
        case ixgbe_mac_82599EB:
        case ixgbe_mac_X540:
        case ixgbe_mac_X550:
        case ixgbe_mac_X550EM_x:
        case ixgbe_mac_x550em_a:
                mask = (qmask & 0xFFFFFFFF);
                IXGBE_WRITE_REG(&adapter->hw, IXGBE_EICS_EX(0), mask);
                mask = (qmask >> 32);
                IXGBE_WRITE_REG(&adapter->hw, IXGBE_EICS_EX(1), mask);
                break;
        default:
                break;
        }
}

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

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

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

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

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

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

static void ixgbe_update_xoff_received(struct ixgbe_adapter *adapter)
{
        struct ixgbe_hw *hw = &adapter->hw;
        struct ixgbe_hw_stats *hwstats = &adapter->stats;
        u32 xoff[8] = {0};
        u8 tc;
        int i;
        bool pfc_en = adapter->dcb_cfg.pfc_mode_enable;

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

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

        /* update stats for each tc, only valid with PFC enabled */
        for (i = 0; i < MAX_TX_PACKET_BUFFERS; i++) {
                u32 pxoffrxc;

                switch (hw->mac.type) {
                case ixgbe_mac_82598EB:
                        pxoffrxc = IXGBE_READ_REG(hw, IXGBE_PXOFFRXC(i));
                        break;
                default:
                        pxoffrxc = IXGBE_READ_REG(hw, IXGBE_PXOFFRXCNT(i));
                }
                hwstats->pxoffrxc[i] += pxoffrxc;
                /* Get the TC for given UP */
                tc = netdev_get_prio_tc_map(adapter->netdev, i);
                xoff[tc] += pxoffrxc;
        }

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

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

        for (i = 0; i < adapter->num_xdp_queues; i++) {
                struct ixgbe_ring *xdp_ring = adapter->xdp_ring[i];

                tc = xdp_ring->dcb_tc;
                if (xoff[tc])
                        clear_bit(__IXGBE_HANG_CHECK_ARMED, &xdp_ring->state);
        }
}

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

static u64 ixgbe_get_tx_pending(struct ixgbe_ring *ring)
{
        unsigned int head, tail;

        head = ring->next_to_clean;
        tail = ring->next_to_use;

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

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

        clear_check_for_tx_hang(tx_ring);

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

        return false;
}

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

        /* Do the reset outside of interrupt context */
        if (!test_bit(__IXGBE_DOWN, &adapter->state)) {
                set_bit(__IXGBE_RESET_REQUESTED, &adapter->state);
                e_warn(drv, "initiating reset due to tx timeout\n");
                ixgbe_service_event_schedule(adapter);
        }
}

/**
 * ixgbe_tx_maxrate - callback to set the maximum per-queue bitrate
 * @netdev: network interface device structure
 * @queue_index: Tx queue to set
 * @maxrate: desired maximum transmit bitrate
 **/
static int ixgbe_tx_maxrate(struct net_device *netdev,
                            int queue_index, u32 maxrate)
{
        struct ixgbe_adapter *adapter = netdev_priv(netdev);
        struct ixgbe_hw *hw = &adapter->hw;
        u32 bcnrc_val = ixgbe_link_mbps(adapter);

        if (!maxrate)
                return 0;

        /* Calculate the rate factor values to set */
        bcnrc_val <<= IXGBE_RTTBCNRC_RF_INT_SHIFT;
        bcnrc_val /= maxrate;

        /* clear everything but the rate factor */
        bcnrc_val &= IXGBE_RTTBCNRC_RF_INT_MASK |
        IXGBE_RTTBCNRC_RF_DEC_MASK;

        /* enable the rate scheduler */
        bcnrc_val |= IXGBE_RTTBCNRC_RS_ENA;

        IXGBE_WRITE_REG(hw, IXGBE_RTTDQSEL, queue_index);
        IXGBE_WRITE_REG(hw, IXGBE_RTTBCNRC, bcnrc_val);

        return 0;
}

/**
 * ixgbe_clean_tx_irq - Reclaim resources after transmit completes
 * @q_vector: structure containing interrupt and ring information
 * @tx_ring: tx ring to clean
 * @napi_budget: Used to determine if we are in netpoll
 **/
static bool ixgbe_clean_tx_irq(struct ixgbe_q_vector *q_vector,
                               struct ixgbe_ring *tx_ring, int napi_budget)
{
        struct ixgbe_adapter *adapter = q_vector->adapter;
        struct ixgbe_tx_buffer *tx_buffer;
        union ixgbe_adv_tx_desc *tx_desc;
        unsigned int total_bytes = 0, total_packets = 0, total_ipsec = 0;
        unsigned int budget = q_vector->tx.work_limit;
        unsigned int i = tx_ring->next_to_clean;

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

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

        do {
                union ixgbe_adv_tx_desc *eop_desc = tx_buffer->next_to_watch;

                /* if next_to_watch is not set then there is no work pending */
                if (!eop_desc)
                        break;

                /* prevent any other reads prior to eop_desc */
                smp_rmb();

                /* if DD is not set pending work has not been completed */
                if (!(eop_desc->wb.status & cpu_to_le32(IXGBE_TXD_STAT_DD)))
                        break;

                /* clear next_to_watch to prevent false hangs */
                tx_buffer->next_to_watch = NULL;

                /* update the statistics for this packet */
                total_bytes += tx_buffer->bytecount;
                total_packets += tx_buffer->gso_segs;
                if (tx_buffer->tx_flags & IXGBE_TX_FLAGS_IPSEC)
                        total_ipsec++;

                /* free the skb */
                if (ring_is_xdp(tx_ring))
                        xdp_return_frame(tx_buffer->xdpf);
                else
                        napi_consume_skb(tx_buffer->skb, napi_budget);

                /* unmap skb header data */
                dma_unmap_single(tx_ring->dev,
                                 dma_unmap_addr(tx_buffer, dma),
                                 dma_unmap_len(tx_buffer, len),
                                 DMA_TO_DEVICE);

                /* clear tx_buffer data */
                dma_unmap_len_set(tx_buffer, len, 0);

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

                        /* unmap any remaining paged data */
                        if (dma_unmap_len(tx_buffer, len)) {
                                dma_unmap_page(tx_ring->dev,
                                               dma_unmap_addr(tx_buffer, dma),
                                               dma_unmap_len(tx_buffer, len),
                                               DMA_TO_DEVICE);
                                dma_unmap_len_set(tx_buffer, len, 0);
                        }
                }

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

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

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

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

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

                if (!ring_is_xdp(tx_ring))
                        netif_stop_subqueue(tx_ring->netdev,
                                            tx_ring->queue_index);

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

                /* schedule immediate reset if we believe we hung */
                ixgbe_tx_timeout_reset(adapter);

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

        if (ring_is_xdp(tx_ring))
                return !!budget;

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

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

        return !!budget;
}

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

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

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

        /*
         * We can enable relaxed ordering for reads, but not writes when
         * DCA is enabled.  This is due to a known issue in some chipsets
         * which will cause the DCA tag to be cleared.
         */
        txctrl |= IXGBE_DCA_TXCTRL_DESC_RRO_EN |
                  IXGBE_DCA_TXCTRL_DATA_RRO_EN |
                  IXGBE_DCA_TXCTRL_DESC_DCA_EN;

        IXGBE_WRITE_REG(hw, reg_offset, txctrl);
}

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

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

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

        /*
         * We can enable relaxed ordering for reads, but not writes when
         * DCA is enabled.  This is due to a known issue in some chipsets
         * which will cause the DCA tag to be cleared.
         */
        rxctrl |= IXGBE_DCA_RXCTRL_DESC_RRO_EN |
                  IXGBE_DCA_RXCTRL_DATA_DCA_EN |
                  IXGBE_DCA_RXCTRL_DESC_DCA_EN;

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

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

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

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

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

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

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

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

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

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

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

        switch (event) {
        case DCA_PROVIDER_ADD:
                /* if we're already enabled, don't do it again */
                if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
                        break;
                if (dca_add_requester(dev) == 0) {
                        adapter->flags |= IXGBE_FLAG_DCA_ENABLED;
                        IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_CTRL,
                                        IXGBE_DCA_CTRL_DCA_MODE_CB2);
                        break;
                }
                fallthrough; /* DCA is disabled. */
        case DCA_PROVIDER_REMOVE:
                if (adapter->flags & IXGBE_FLAG_DCA_ENABLED) {
                        dca_remove_requester(dev);
                        adapter->flags &= ~IXGBE_FLAG_DCA_ENABLED;
                        IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_CTRL,
                                        IXGBE_DCA_CTRL_DCA_DISABLE);
                }
                break;
        }

        return 0;
}

#endif /* CONFIG_IXGBE_DCA */

#define IXGBE_RSS_L4_TYPES_MASK \
        ((1ul << IXGBE_RXDADV_RSSTYPE_IPV4_TCP) | \
         (1ul << IXGBE_RXDADV_RSSTYPE_IPV4_UDP) | \
         (1ul << IXGBE_RXDADV_RSSTYPE_IPV6_TCP) | \
         (1ul << IXGBE_RXDADV_RSSTYPE_IPV6_UDP))

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

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

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

        if (!rss_type)
                return;

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

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

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

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

        skb_checksum_none_assert(skb);

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

        /* check for VXLAN and Geneve packets */
        if (pkt_info & cpu_to_le16(IXGBE_RXDADV_PKTTYPE_VXLAN)) {
                encap_pkt = true;
                skb->encapsulation = 1;
        }

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

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

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

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

        /* It must be a TCP or UDP packet with a valid checksum */
        skb->ip_summed = CHECKSUM_UNNECESSARY;
        if (encap_pkt) {
                if (!ixgbe_test_staterr(rx_desc, IXGBE_RXD_STAT_OUTERIPCS))
                        return;

                if (ixgbe_test_staterr(rx_desc, IXGBE_RXDADV_ERR_OUTERIPER)) {
                        skb->ip_summed = CHECKSUM_NONE;
                        return;
                }
                /* If we checked the outer header let the stack know */
                skb->csum_level = 1;
        }
}

static unsigned int ixgbe_rx_offset(struct ixgbe_ring *rx_ring)
{
        return ring_uses_build_skb(rx_ring) ? IXGBE_SKB_PAD : 0;
}

static bool ixgbe_alloc_mapped_page(struct ixgbe_ring *rx_ring,
                                    struct ixgbe_rx_buffer *bi)
{
        struct page *page = bi->page;
        dma_addr_t dma;

        /* since we are recycling buffers we should seldom need to alloc */
        if (likely(page))
                return true;

        /* alloc new page for storage */
        page = dev_alloc_pages(ixgbe_rx_pg_order(rx_ring));
        if (unlikely(!page)) {
                rx_ring->rx_stats.alloc_rx_page_failed++;
                return false;
        }

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

        /*
         * if mapping failed free memory back to system since
         * there isn't much point in holding memory we can't use
         */
        if (dma_mapping_error(rx_ring->dev, dma)) {
                __free_pages(page, ixgbe_rx_pg_order(rx_ring));

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

        bi->dma = dma;
        bi->page = page;
        bi->page_offset = rx_ring->rx_offset;
        page_ref_add(page, USHRT_MAX - 1);
        bi->pagecnt_bias = USHRT_MAX;
        rx_ring->rx_stats.alloc_rx_page++;

        return true;
}

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

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

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

        bufsz = ixgbe_rx_bufsz(rx_ring);

        do {
                if (!ixgbe_alloc_mapped_page(rx_ring, bi))
                        break;

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

                /*
                 * Refresh the desc even if buffer_addrs didn't change
                 * because each write-back erases this info.
                 */
                rx_desc->read.pkt_addr = cpu_to_le64(bi->dma + bi->page_offset);

                rx_desc++;
                bi++;
                i++;
                if (unlikely(!i)) {
                        rx_desc = IXGBE_RX_DESC(rx_ring, 0);
                        bi = rx_ring->rx_buffer_info;
                        i -= rx_ring->count;
                }

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

                cleaned_count--;
        } while (cleaned_count);

        i += rx_ring->count;

        if (rx_ring->next_to_use != i) {
                rx_ring->next_to_use = i;

                /* update next to alloc since we have filled the ring */
                rx_ring->next_to_alloc = i;

                /* Force memory writes to complete before letting h/w
                 * know there are new descriptors to fetch.  (Only
                 * applicable for weak-ordered memory model archs,
                 * such as IA-64).
                 */
                wmb();
                writel(i, rx_ring->tail);
        }
}

static void ixgbe_set_rsc_gso_size(struct ixgbe_ring *ring,
                                   struct sk_buff *skb)
{
        u16 hdr_len = skb_headlen(skb);

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

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

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

        ixgbe_set_rsc_gso_size(rx_ring, skb);

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

/**
 * ixgbe_process_skb_fields - Populate skb header fields from Rx descriptor
 * @rx_ring: rx descriptor ring packet is being transacted on
 * @rx_desc: pointer to the EOP Rx descriptor
 * @skb: pointer to current skb being populated
 *
 * This function checks the ring, descriptor, and packet information in
 * order to populate the hash, checksum, VLAN, timestamp, protocol, and
 * other fields within the skb.
 **/
void ixgbe_process_skb_fields(struct ixgbe_ring *rx_ring,
                              union ixgbe_adv_rx_desc *rx_desc,
                              struct sk_buff *skb)
{
        struct net_device *dev = rx_ring->netdev;
        u32 flags = rx_ring->q_vector->adapter->flags;

        ixgbe_update_rsc_stats(rx_ring, skb);

        ixgbe_rx_hash(rx_ring, rx_desc, skb);

        ixgbe_rx_checksum(rx_ring, rx_desc, skb);

        if (unlikely(flags & IXGBE_FLAG_RX_HWTSTAMP_ENABLED))
                ixgbe_ptp_rx_hwtstamp(rx_ring, rx_desc, skb);

        if ((dev->features & NETIF_F_HW_VLAN_CTAG_RX) &&
            ixgbe_test_staterr(rx_desc, IXGBE_RXD_STAT_VP)) {
                u16 vid = le16_to_cpu(rx_desc->wb.upper.vlan);
                __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid);
        }

        if (ixgbe_test_staterr(rx_desc, IXGBE_RXDADV_STAT_SECP))
                ixgbe_ipsec_rx(rx_ring, rx_desc, skb);

        /* record Rx queue, or update MACVLAN statistics */
        if (netif_is_ixgbe(dev))
                skb_record_rx_queue(skb, rx_ring->queue_index);
        else
                macvlan_count_rx(netdev_priv(dev), skb->len + ETH_HLEN, true,
                                 false);

        skb->protocol = eth_type_trans(skb, dev);
}

void ixgbe_rx_skb(struct ixgbe_q_vector *q_vector,
                  struct sk_buff *skb)
{
        napi_gro_receive(&q_vector->napi, skb);
}

/**
 * ixgbe_is_non_eop - process handling of non-EOP buffers
 * @rx_ring: Rx ring being processed
 * @rx_desc: Rx descriptor for current buffer
 * @skb: Current socket buffer containing buffer in progress
 *
 * This function updates next to clean.  If the buffer is an EOP buffer
 * this function exits returning false, otherwise it will place the
 * sk_buff in the next buffer to be chained and return true indicating
 * that this is in fact a non-EOP buffer.
 **/
static bool ixgbe_is_non_eop(struct ixgbe_ring *rx_ring,
                             union ixgbe_adv_rx_desc *rx_desc,
                             struct sk_buff *skb)
{
        u32 ntc = rx_ring->next_to_clean + 1;

        /* fetch, update, and store next to clean */
        ntc = (ntc < rx_ring->count) ? ntc : 0;
        rx_ring->next_to_clean = ntc;

        prefetch(IXGBE_RX_DESC(rx_ring, ntc));

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

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

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

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

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

        /* place skb in next buffer to be received */
        rx_ring->rx_buffer_info[ntc].skb = skb;
        rx_ring->rx_stats.non_eop_descs++;

        return true;
}

/**
 * ixgbe_pull_tail - ixgbe specific version of skb_pull_tail
 * @rx_ring: rx descriptor ring packet is being transacted on
 * @skb: pointer to current skb being adjusted
 *
 * This function is an ixgbe specific version of __pskb_pull_tail.  The
 * main difference between this version and the original function is that
 * this function can make several assumptions about the state of things
 * that allow for significant optimizations versus the standard function.
 * As a result we can do things like drop a frag and maintain an accurate
 * truesize for the skb.
 */
static void ixgbe_pull_tail(struct ixgbe_ring *rx_ring,
                            struct sk_buff *skb)
{
        skb_frag_t *frag = &skb_shinfo(skb)->frags[0];
        unsigned char *va;
        unsigned int pull_len;

        /*
         * it is valid to use page_address instead of kmap since we are
         * working with pages allocated out of the lomem pool per
         * alloc_page(GFP_ATOMIC)
         */
        va = skb_frag_address(frag);

        /*
         * we need the header to contain the greater of either ETH_HLEN or
         * 60 bytes if the skb->len is less than 60 for skb_pad.
         */
        pull_len = eth_get_headlen(skb->dev, va, IXGBE_RX_HDR_SIZE);

        /* align pull length to size of long to optimize memcpy performance */
        skb_copy_to_linear_data(skb, va, ALIGN(pull_len, sizeof(long)));

        /* update all of the pointers */
        skb_frag_size_sub(frag, pull_len);
        skb_frag_off_add(frag, pull_len);
        skb->data_len -= pull_len;
        skb->tail += pull_len;
}

/**
 * ixgbe_dma_sync_frag - perform DMA sync for first frag of SKB
 * @rx_ring: rx descriptor ring packet is being transacted on
 * @skb: pointer to current skb being updated
 *
 * This function provides a basic DMA sync up for the first fragment of an
 * skb.  The reason for doing this is that the first fragment cannot be
 * unmapped until we have reached the end of packet descriptor for a buffer
 * chain.
 */
static void ixgbe_dma_sync_frag(struct ixgbe_ring *rx_ring,
                                struct sk_buff *skb)
{
        if (ring_uses_build_skb(rx_ring)) {
                unsigned long mask = (unsigned long)ixgbe_rx_pg_size(rx_ring) - 1;
                unsigned long offset = (unsigned long)(skb->data) & mask;

                dma_sync_single_range_for_cpu(rx_ring->dev,
                                              IXGBE_CB(skb)->dma,
                                              offset,
                                              skb_headlen(skb),
                                              DMA_FROM_DEVICE);
        } else {
                skb_frag_t *frag = &skb_shinfo(skb)->frags[0];

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

        /* If the page was released, just unmap it. */
        if (unlikely(IXGBE_CB(skb)->page_released)) {
                dma_unmap_page_attrs(rx_ring->dev, IXGBE_CB(skb)->dma,
                                     ixgbe_rx_pg_size(rx_ring),
                                     DMA_FROM_DEVICE,
                                     IXGBE_RX_DMA_ATTR);
        }
}

/**
 * ixgbe_cleanup_headers - Correct corrupted or empty headers
 * @rx_ring: rx descriptor ring packet is being transacted on
 * @rx_desc: pointer to the EOP Rx descriptor
 * @skb: pointer to current skb being fixed
 *
 * Check if the skb is valid in the XDP case it will be an error pointer.
 * Return true in this case to abort processing and advance to next
 * descriptor.
 *
 * Check for corrupted packet headers caused by senders on the local L2
 * embedded NIC switch not setting up their Tx Descriptors right.  These
 * should be very rare.
 *
 * Also address the case where we are pulling data in on pages only
 * and as such no data is present in the skb header.
 *
 * In addition if skb is not at least 60 bytes we need to pad it so that
 * it is large enough to qualify as a valid Ethernet frame.
 *
 * Returns true if an error was encountered and skb was freed.
 **/
bool ixgbe_cleanup_headers(struct ixgbe_ring *rx_ring,
                           union ixgbe_adv_rx_desc *rx_desc,
                           struct sk_buff *skb)
{
        struct net_device *netdev = rx_ring->netdev;

        /* XDP packets use error pointer so abort at this point */
        if (IS_ERR(skb))
                return true;

        /* Verify netdev is present, and that packet does not have any
         * errors that would be unacceptable to the netdev.
         */
        if (!netdev ||
            (unlikely(ixgbe_test_staterr(rx_desc,
                                         IXGBE_RXDADV_ERR_FRAME_ERR_MASK) &&
             !(netdev->features & NETIF_F_RXALL)))) {
                dev_kfree_skb_any(skb);
                return true;
        }

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

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

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

        return false;
}

/**
 * ixgbe_reuse_rx_page - page flip buffer and store it back on the ring
 * @rx_ring: rx descriptor ring to store buffers on
 * @old_buff: donor buffer to have page reused
 *
 * Synchronizes page for reuse by the adapter
 **/
static void ixgbe_reuse_rx_page(struct ixgbe_ring *rx_ring,
                                struct ixgbe_rx_buffer *old_buff)
{
        struct ixgbe_rx_buffer *new_buff;
        u16 nta = rx_ring->next_to_alloc;

        new_buff = &rx_ring->rx_buffer_info[nta];

        /* update, and store next to alloc */
        nta++;
        rx_ring->next_to_alloc = (nta < rx_ring->count) ? nta : 0;

        /* Transfer page from old buffer to new buffer.
         * Move each member individually to avoid possible store
         * forwarding stalls and unnecessary copy of skb.
         */
        new_buff->dma           = old_buff->dma;
        new_buff->page          = old_buff->page;
        new_buff->page_offset   = old_buff->page_offset;
        new_buff->pagecnt_bias  = old_buff->pagecnt_bias;
}

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

        /* avoid re-using remote and pfmemalloc pages */
        if (!dev_page_is_reusable(page))
                return false;

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

        /* If we have drained the page fragment pool we need to update
         * the pagecnt_bias and page count so that we fully restock the
         * number of references the driver holds.
         */
        if (unlikely(pagecnt_bias == 1)) {
                page_ref_add(page, USHRT_MAX - 1);
                rx_buffer->pagecnt_bias = USHRT_MAX;
        }

        return true;
}

/**
 * ixgbe_add_rx_frag - Add contents of Rx buffer to sk_buff
 * @rx_ring: rx descriptor ring to transact packets on
 * @rx_buffer: buffer containing page to add
 * @skb: sk_buff to place the data into
 * @size: size of data in rx_buffer
 *
 * This function will add the data contained in rx_buffer->page to the skb.
 * This is done either through a direct copy if the data in the buffer is
 * less than the skb header size, otherwise it will just attach the page as
 * a frag to the skb.
 *
 * The function will then update the page offset if necessary and return
 * true if the buffer can be reused by the adapter.
 **/
static void ixgbe_add_rx_frag(struct ixgbe_ring *rx_ring,
                              struct ixgbe_rx_buffer *rx_buffer,
                              struct sk_buff *skb,
                              unsigned int size)
{
#if (PAGE_SIZE < 8192)
        unsigned int truesize = ixgbe_rx_pg_size(rx_ring) / 2;
#else
        unsigned int truesize = rx_ring->rx_offset ?
                                SKB_DATA_ALIGN(rx_ring->rx_offset + size) :
                                SKB_DATA_ALIGN(size);
#endif
        skb_add_rx_frag(skb, skb_shinfo(skb)->nr_frags, rx_buffer->page,
                        rx_buffer->page_offset, size, truesize);
#if (PAGE_SIZE < 8192)
        rx_buffer->page_offset ^= truesize;
#else
        rx_buffer->page_offset += truesize;
#endif
}

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

        rx_buffer = &rx_ring->rx_buffer_info[rx_ring->next_to_clean];
        *rx_buffer_pgcnt =
#if (PAGE_SIZE < 8192)
                page_count(rx_buffer->page);
#else
                0;
#endif
        prefetchw(rx_buffer->page);
        *skb = rx_buffer->skb;

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

        /* we are reusing so sync this buffer for CPU use */
        dma_sync_single_range_for_cpu(rx_ring->dev,
                                      rx_buffer->dma,
                                      rx_buffer->page_offset,
                                      size,
                                      DMA_FROM_DEVICE);
skip_sync:
        rx_buffer->pagecnt_bias--;

        return rx_buffer;
}

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

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

static struct sk_buff *ixgbe_construct_skb(struct ixgbe_ring *rx_ring,
                                           struct ixgbe_rx_buffer *rx_buffer,
                                           struct xdp_buff *xdp,
                                           union ixgbe_adv_rx_desc *rx_desc)
{
        unsigned int size = xdp->data_end - xdp->data;
#if (PAGE_SIZE < 8192)
        unsigned int truesize = ixgbe_rx_pg_size(rx_ring) / 2;
#else
        unsigned int truesize = SKB_DATA_ALIGN(xdp->data_end -
                                               xdp->data_hard_start);
#endif
        struct sk_buff *skb;

        /* prefetch first cache line of first page */
        net_prefetch(xdp->data);

        /* Note, we get here by enabling legacy-rx via:
         *
         *    ethtool --set-priv-flags <dev> legacy-rx on
         *
         * In this mode, we currently get 0 extra XDP headroom as
         * opposed to having legacy-rx off, where we process XDP
         * packets going to stack via ixgbe_build_skb(). The latter
         * provides us currently with 192 bytes of headroom.
         *
         * For ixgbe_construct_skb() mode it means that the
         * xdp->data_meta will always point to xdp->data, since
         * the helper cannot expand the head. Should this ever
         * change in future for legacy-rx mode on, then lets also
         * add xdp->data_meta handling here.
         */

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

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

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

        return skb;
}

static struct sk_buff *ixgbe_build_skb(struct ixgbe_ring *rx_ring,
                                       struct ixgbe_rx_buffer *rx_buffer,
                                       struct xdp_buff *xdp,
                                       union ixgbe_adv_rx_desc *rx_desc)
{
        unsigned int metasize = xdp->data - xdp->data_meta;
#if (PAGE_SIZE < 8192)
        unsigned int truesize = ixgbe_rx_pg_size(rx_ring) / 2;
#else
        unsigned int truesize = SKB_DATA_ALIGN(sizeof(struct skb_shared_info)) +
                                SKB_DATA_ALIGN(xdp->data_end -
                                               xdp->data_hard_start);
#endif
        struct sk_buff *skb;

        /* Prefetch first cache line of first page. If xdp->data_meta
         * is unused, this points extactly as xdp->data, otherwise we
         * likely have a consumer accessing first few bytes of meta
         * data, and then actual data.
         */
        net_prefetch(xdp->data_meta);

        /* build an skb to around the page buffer */
        skb = build_skb(xdp->data_hard_start, truesize);
        if (unlikely(!skb))
                return NULL;

        /* update pointers within the skb to store the data */
        skb_reserve(skb, xdp->data - xdp->data_hard_start);
        __skb_put(skb, xdp->data_end - xdp->data);
        if (metasize)
                skb_metadata_set(skb, metasize);

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

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

        return skb;
}

static struct sk_buff *ixgbe_run_xdp(struct ixgbe_adapter *adapter,
                                     struct ixgbe_ring *rx_ring,
                                     struct xdp_buff *xdp)
{
        int err, result = IXGBE_XDP_PASS;
        struct bpf_prog *xdp_prog;
        struct xdp_frame *xdpf;
        u32 act;

        xdp_prog = READ_ONCE(rx_ring->xdp_prog);

        if (!xdp_prog)
                goto xdp_out;

        prefetchw(xdp->data_hard_start); /* xdp_frame write */

        act = bpf_prog_run_xdp(xdp_prog, xdp);
        switch (act) {
        case XDP_PASS:
                break;
        case XDP_TX:
                xdpf = xdp_convert_buff_to_frame(xdp);
                if (unlikely(!xdpf))
                        goto out_failure;
                result = ixgbe_xmit_xdp_ring(adapter, xdpf);
                if (result == IXGBE_XDP_CONSUMED)
                        goto out_failure;
                break;
        case XDP_REDIRECT:
                err = xdp_do_redirect(adapter->netdev, xdp, xdp_prog);
                if (err)
                        goto out_failure;
                result = IXGBE_XDP_REDIR;
                break;
        default:
                bpf_warn_invalid_xdp_action(act);
                fallthrough;
        case XDP_ABORTED:
out_failure:
                trace_xdp_exception(rx_ring->netdev, xdp_prog, act);
                fallthrough; /* handle aborts by dropping packet */
        case XDP_DROP:
                result = IXGBE_XDP_CONSUMED;
                break;
        }
xdp_out:
        return ERR_PTR(-result);
}

static unsigned int ixgbe_rx_frame_truesize(struct ixgbe_ring *rx_ring,
                                            unsigned int size)
{
        unsigned int truesize;

#if (PAGE_SIZE < 8192)
        truesize = ixgbe_rx_pg_size(rx_ring) / 2; /* Must be power-of-2 */
#else
        truesize = rx_ring->rx_offset ?
                SKB_DATA_ALIGN(rx_ring->rx_offset + size) +
                SKB_DATA_ALIGN(sizeof(struct skb_shared_info)) :
                SKB_DATA_ALIGN(size);
#endif
        return truesize;
}

static void ixgbe_rx_buffer_flip(struct ixgbe_ring *rx_ring,
                                 struct ixgbe_rx_buffer *rx_buffer,
                                 unsigned int size)
{
        unsigned int truesize = ixgbe_rx_frame_truesize(rx_ring, size);
#if (PAGE_SIZE < 8192)
        rx_buffer->page_offset ^= truesize;
#else
        rx_buffer->page_offset += truesize;
#endif
}

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

        /* Frame size depend on rx_ring setup when PAGE_SIZE=4K */
#if (PAGE_SIZE < 8192)
        frame_sz = ixgbe_rx_frame_truesize(rx_ring, 0);
#endif
        xdp_init_buff(&xdp, frame_sz, &rx_ring->xdp_rxq);

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

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

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

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

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

                /* retrieve a buffer from the ring */
                if (!skb) {
                        unsigned char *hard_start;

                        hard_start = page_address(rx_buffer->page) +
                                     rx_buffer->page_offset - offset;
                        xdp_prepare_buff(&xdp, hard_start, offset, size, true);
#if (PAGE_SIZE > 4096)
                        /* At larger PAGE_SIZE, frame_sz depend on len size */
                        xdp.frame_sz = ixgbe_rx_frame_truesize(rx_ring, size);
#endif
                        skb = ixgbe_run_xdp(adapter, rx_ring, &xdp);
                }

                if (IS_ERR(skb)) {
                        unsigned int xdp_res = -PTR_ERR(skb);

                        if (xdp_res & (IXGBE_XDP_TX | IXGBE_XDP_REDIR)) {
                                xdp_xmit |= xdp_res;
                                ixgbe_rx_buffer_flip(rx_ring, rx_buffer, size);
                        } else {
                                rx_buffer->pagecnt_bias++;
                        }
                        total_rx_packets++;
                        total_rx_bytes += size;
                } else if (skb) {
                        ixgbe_add_rx_frag(rx_ring, rx_buffer, skb, size);
                } else if (ring_uses_build_skb(rx_ring)) {
                        skb = ixgbe_build_skb(rx_ring, rx_buffer,
                                              &xdp, rx_desc);
                } else {
                        skb = ixgbe_construct_skb(rx_ring, rx_buffer,
                                                  &xdp, rx_desc);
                }

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

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

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

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

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

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

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

#endif /* IXGBE_FCOE */
                ixgbe_rx_skb(q_vector, skb);

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

        if (xdp_xmit & IXGBE_XDP_REDIR)
                xdp_do_flush_map();

        if (xdp_xmit & IXGBE_XDP_TX) {
                struct ixgbe_ring *ring = adapter->xdp_ring[smp_processor_id()];

                /* Force memory writes to complete before letting h/w
                 * know there are new descriptors to fetch.
                 */
                wmb();
                writel(ring->next_to_use, ring->tail);
        }

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

        return total_rx_packets;
}

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

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

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

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

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

                ixgbe_write_eitr(q_vector);
        }

        switch (adapter->hw.mac.type) {
        case ixgbe_mac_82598EB:
                ixgbe_set_ivar(adapter, -1, IXGBE_IVAR_OTHER_CAUSES_INDEX,
                               v_idx);
                break;
        case ixgbe_mac_82599EB:
        case ixgbe_mac_X540:
        case ixgbe_mac_X550:
        case ixgbe_mac_X550EM_x:
        case ixgbe_mac_x550em_a:
                ixgbe_set_ivar(adapter, -1, 1, v_idx);
                break;
        default:
                break;
        }
        IXGBE_WRITE_REG(&adapter->hw, IXGBE_EITR(v_idx), 1950);

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

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

/**
 * ixgbe_update_itr - update the dynamic ITR value based on statistics
 * @q_vector: structure containing interrupt and ring information
 * @ring_container: structure containing ring performance data
 *
 *      Stores a new ITR value based on packets and byte
 *      counts during the last interrupt.  The advantage of per interrupt
 *      computation is faster updates and more accurate ITR for the current
 *      traffic pattern.  Constants in this function were computed
 *      based on theoretical maximum wire speed and thresholds were set based
 *      on testing data as well as attempting to minimize response time
 *      while increasing bulk throughput.
 **/
static void ixgbe_update_itr(struct ixgbe_q_vector *q_vector,
                             struct ixgbe_ring_container *ring_container)
{
        unsigned int itr = IXGBE_ITR_ADAPTIVE_MIN_USECS |
                           IXGBE_ITR_ADAPTIVE_LATENCY;
        unsigned int avg_wire_size, packets, bytes;
        unsigned long next_update = jiffies;

        /* If we don't have any rings just leave ourselves set for maximum
         * possible latency so we take ourselves out of the equation.
         */
        if (!ring_container->ring)
                return;

        /* If we didn't update within up to 1 - 2 jiffies we can assume
         * that either packets are coming in so slow there hasn't been
         * any work, or that there is so much work that NAPI is dealing
         * with interrupt moderation and we don't need to do anything.
         */
        if (time_after(next_update, ring_container->next_update))
                goto clear_counts;

        packets = ring_container->total_packets;

        /* We have no packets to actually measure against. This means
         * either one of the other queues on this vector is active or
         * we are a Tx queue doing TSO with too high of an interrupt rate.
         *
         * When this occurs just tick up our delay by the minimum value
         * and hope that this extra delay will prevent us from being called
         * without any work on our queue.
         */
        if (!packets) {
                itr = (q_vector->itr >> 2) + IXGBE_ITR_ADAPTIVE_MIN_INC;
                if (itr > IXGBE_ITR_ADAPTIVE_MAX_USECS)
                        itr = IXGBE_ITR_ADAPTIVE_MAX_USECS;
                itr += ring_container->itr & IXGBE_ITR_ADAPTIVE_LATENCY;
                goto clear_counts;
        }

        bytes = ring_container->total_bytes;

        /* If packets are less than 4 or bytes are less than 9000 assume
         * insufficient data to use bulk rate limiting approach. We are
         * likely latency driven.
         */
        if (packets < 4 && bytes < 9000) {
                itr = IXGBE_ITR_ADAPTIVE_LATENCY;
                goto adjust_by_size;
        }

        /* Between 4 and 48 we can assume that our current interrupt delay
         * is only slightly too low. As such we should increase it by a small
         * fixed amount.
         */
        if (packets < 48) {
                itr = (q_vector->itr >> 2) + IXGBE_ITR_ADAPTIVE_MIN_INC;
                if (itr > IXGBE_ITR_ADAPTIVE_MAX_USECS)
                        itr = IXGBE_ITR_ADAPTIVE_MAX_USECS;
                goto clear_counts;
        }

        /* Between 48 and 96 is our "goldilocks" zone where we are working
         * out "just right". Just report that our current ITR is good for us.
         */
        if (packets < 96) {
                itr = q_vector->itr >> 2;
                goto clear_counts;
        }

        /* If packet count is 96 or greater we are likely looking at a slight
         * overrun of the delay we want. Try halving our delay to see if that
         * will cut the number of packets in half per interrupt.
         */
        if (packets < 256) {
                itr = q_vector->itr >> 3;
                if (itr < IXGBE_ITR_ADAPTIVE_MIN_USECS)
                        itr = IXGBE_ITR_ADAPTIVE_MIN_USECS;
                goto clear_counts;
        }

        /* The paths below assume we are dealing with a bulk ITR since number
         * of packets is 256 or greater. We are just going to have to compute
         * a value and try to bring the count under control, though for smaller
         * packet sizes there isn't much we can do as NAPI polling will likely
         * be kicking in sooner rather than later.
         */
        itr = IXGBE_ITR_ADAPTIVE_BULK;

adjust_by_size:
        /* If packet counts are 256 or greater we can assume we have a gross
         * overestimation of what the rate should be. Instead of trying to fine
         * tune it just use the formula below to try and dial in an exact value
         * give the current packet size of the frame.
         */
        avg_wire_size = bytes / packets;

        /* The following is a crude approximation of:
         *  wmem_default / (size + overhead) = desired_pkts_per_int
         *  rate / bits_per_byte / (size + ethernet overhead) = pkt_rate
         *  (desired_pkt_rate / pkt_rate) * usecs_per_sec = ITR value
         *
         * Assuming wmem_default is 212992 and overhead is 640 bytes per
         * packet, (256 skb, 64 headroom, 320 shared info), we can reduce the
         * formula down to
         *
         *  (170 * (size + 24)) / (size + 640) = ITR
         *
         * We first do some math on the packet size and then finally bitshift
         * by 8 after rounding up. We also have to account for PCIe link speed
         * difference as ITR scales based on this.
         */
        if (avg_wire_size <= 60) {
                /* Start at 50k ints/sec */
                avg_wire_size = 5120;
        } else if (avg_wire_size <= 316) {
                /* 50K ints/sec to 16K ints/sec */
                avg_wire_size *= 40;
                avg_wire_size += 2720;
        } else if (avg_wire_size <= 1084) {
                /* 16K ints/sec to 9.2K ints/sec */
                avg_wire_size *= 15;
                avg_wire_size += 11452;
        } else if (avg_wire_size < 1968) {
                /* 9.2K ints/sec to 8K ints/sec */
                avg_wire_size *= 5;
                avg_wire_size += 22420;
        } else {
                /* plateau at a limit of 8K ints/sec */
                avg_wire_size = 32256;
        }

        /* If we are in low latency mode half our delay which doubles the rate
         * to somewhere between 100K to 16K ints/sec
         */
        if (itr & IXGBE_ITR_ADAPTIVE_LATENCY)
                avg_wire_size >>= 1;

        /* Resultant value is 256 times larger than it needs to be. This
         * gives us room to adjust the value as needed to either increase
         * or decrease the value based on link speeds of 10G, 2.5G, 1G, etc.
         *
         * Use addition as we have already recorded the new latency flag
         * for the ITR value.
         */
        switch (q_vector->adapter->link_speed) {
        case IXGBE_LINK_SPEED_10GB_FULL:
        case IXGBE_LINK_SPEED_100_FULL:
        default:
                itr += DIV_ROUND_UP(avg_wire_size,
                                    IXGBE_ITR_ADAPTIVE_MIN_INC * 256) *
                       IXGBE_ITR_ADAPTIVE_MIN_INC;
                break;
        case IXGBE_LINK_SPEED_2_5GB_FULL:
        case IXGBE_LINK_SPEED_1GB_FULL:
        case IXGBE_LINK_SPEED_10_FULL:
                if (avg_wire_size > 8064)
                        avg_wire_size = 8064;
                itr += DIV_ROUND_UP(avg_wire_size,
                                    IXGBE_ITR_ADAPTIVE_MIN_INC * 64) *
                       IXGBE_ITR_ADAPTIVE_MIN_INC;
                break;
        }

clear_counts:
        /* write back value */
        ring_container->itr = itr;

        /* next update should occur within next jiffy */
        ring_container->next_update = next_update + 1;

        ring_container->total_bytes = 0;
        ring_container->total_packets = 0;
}

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

        switch (adapter->hw.mac.type) {
        case ixgbe_mac_82598EB:
                /* must write high and low 16 bits to reset counter */
                itr_reg |= (itr_reg << 16);
                break;
        case ixgbe_mac_82599EB:
        case ixgbe_mac_X540:
        case ixgbe_mac_X550:
        case ixgbe_mac_X550EM_x:
        case ixgbe_mac_x550em_a:
                /*
                 * set the WDIS bit to not clear the timer bits and cause an
                 * immediate assertion of the interrupt
                 */
                itr_reg |= IXGBE_EITR_CNT_WDIS;
                break;
        default:
                break;
        }
        IXGBE_WRITE_REG(hw, IXGBE_EITR(v_idx), itr_reg);
}

static void ixgbe_set_itr(struct ixgbe_q_vector *q_vector)
{
        u32 new_itr;

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

        /* use the smallest value of new ITR delay calculations */
        new_itr = min(q_vector->rx.itr, q_vector->tx.itr);

        /* Clear latency flag if set, shift into correct position */
        new_itr &= ~IXGBE_ITR_ADAPTIVE_LATENCY;
        new_itr <<= 2;

        if (new_itr != q_vector->itr) {
                /* save the algorithm value here */
                q_vector->itr = new_itr;

                ixgbe_write_eitr(q_vector);
        }
}

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

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

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

        adapter->flags2 &= ~IXGBE_FLAG2_TEMP_SENSOR_EVENT;

        switch (hw->device_id) {
        case IXGBE_DEV_ID_82599_T3_LOM:
                /*
                 * Since the warning interrupt is for both ports
                 * we don't have to check if:
                 *  - This interrupt wasn't for our port.
                 *  - We may have missed the interrupt so always have to
                 *    check if we  got a LSC
                 */
                if (!(eicr & IXGBE_EICR_GPI_SDP0_8259X) &&
                    !(eicr & IXGBE_EICR_LSC))
                        return;

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

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

                        if (link_up)
                                return;
                }

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

                break;
        case IXGBE_DEV_ID_X550EM_A_1G_T:
        case IXGBE_DEV_ID_X550EM_A_1G_T_L:
                rc = hw->phy.ops.check_overtemp(hw);
                if (rc != IXGBE_ERR_OVERTEMP)
                        return;
                break;
        default:
                if (adapter->hw.mac.type >= ixgbe_mac_X540)
                        return;
                if (!(eicr & IXGBE_EICR_GPI_SDP0(hw)))
                        return;
                break;
        }
        e_crit(drv, "%s\n", ixgbe_overheat_msg);

        adapter->interrupt_event = 0;
}

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

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

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

        if (!(adapter->flags2 & IXGBE_FLAG2_TEMP_SENSOR_CAPABLE))
                return;

        switch (adapter->hw.mac.type) {
        case ixgbe_mac_82599EB:
                /*
                 * Need to check link state so complete overtemp check
                 * on service task
                 */
                if (((eicr & IXGBE_EICR_GPI_SDP0(hw)) ||
                     (eicr & IXGBE_EICR_LSC)) &&
                    (!test_bit(__IXGBE_DOWN, &adapter->state))) {
                        adapter->interrupt_event = eicr;
                        adapter->flags2 |= IXGBE_FLAG2_TEMP_SENSOR_EVENT;
                        ixgbe_service_event_schedule(adapter);
                        return;
                }
                return;
        case ixgbe_mac_x550em_a:
                if (eicr & IXGBE_EICR_GPI_SDP0_X550EM_a) {
                        adapter->interrupt_event = eicr;
                        adapter->flags2 |= IXGBE_FLAG2_TEMP_SENSOR_EVENT;
                        ixgbe_service_event_schedule(adapter);
                        IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC,
                                        IXGBE_EICR_GPI_SDP0_X550EM_a);
                        IXGBE_WRITE_REG(&adapter->hw, IXGBE_EICR,
                                        IXGBE_EICR_GPI_SDP0_X550EM_a);
                }
                return;
        case ixgbe_mac_X550:
        case ixgbe_mac_X540:
                if (!(eicr & IXGBE_EICR_TS))
                        return;
                break;
        default:
                return;
        }

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

static 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:
        case ixgbe_mac_X550EM_x:
        case ixgbe_mac_x550em_a:
                switch (hw->mac.ops.get_media_type(hw)) {
                case ixgbe_media_type_fiber:
                case ixgbe_media_type_fiber_qsfp:
                        return true;
                default:
                        return false;
                }
        default:
                return false;
        }
}

static void ixgbe_check_sfp_event(struct ixgbe_adapter *adapter, u32 eicr)
{
        struct ixgbe_hw *hw = &adapter->hw;
        u32 eicr_mask = IXGBE_EICR_GPI_SDP2(hw);

        if (!ixgbe_is_sfp(hw))
                return;

        /* Later MAC's use different SDP */
        if (hw->mac.type >= ixgbe_mac_X540)
                eicr_mask = IXGBE_EICR_GPI_SDP0_X540;

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

        if (adapter->hw.mac.type == ixgbe_mac_82599EB &&
            (eicr & IXGBE_EICR_GPI_SDP1(hw))) {
                /* Clear the interrupt */
                IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_GPI_SDP1(hw));
                if (!test_bit(__IXGBE_DOWN, &adapter->state)) {
                        adapter->flags |= IXGBE_FLAG_NEED_LINK_CONFIG;
                        ixgbe_service_event_schedule(adapter);
                }
        }
}

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

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

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

        switch (hw->mac.type) {
        case ixgbe_mac_82598EB:
                mask = (IXGBE_EIMS_RTX_QUEUE & qmask);
                IXGBE_WRITE_REG(hw, IXGBE_EIMS, mask);
                break;
        case ixgbe_mac_82599EB:
        case ixgbe_mac_X540:
        case ixgbe_mac_X550:
        case ixgbe_mac_X550EM_x:
        case ixgbe_mac_x550em_a:
                mask = (qmask & 0xFFFFFFFF);
                if (mask)
                        IXGBE_WRITE_REG(hw, IXGBE_EIMS_EX(0), mask);
                mask = (qmask >> 32);
                if (mask)
                        IXGBE_WRITE_REG(hw, IXGBE_EIMS_EX(1), mask);
                break;
        default:
                break;
        }
        /* skip the flush */
}

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

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

        if (adapter->flags2 & IXGBE_FLAG2_TEMP_SENSOR_CAPABLE)
                switch (adapter->hw.mac.type) {
                case ixgbe_mac_82599EB:
                        mask |= IXGBE_EIMS_GPI_SDP0(hw);
                        break;
                case ixgbe_mac_X540:
                case ixgbe_mac_X550:
                case ixgbe_mac_X550EM_x:
                case ixgbe_mac_x550em_a:
                        mask |= IXGBE_EIMS_TS;
                        break;
                default:
                        break;
                }
        if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE)
                mask |= IXGBE_EIMS_GPI_SDP1(hw);
        switch (adapter->hw.mac.type) {
        case ixgbe_mac_82599EB:
                mask |= IXGBE_EIMS_GPI_SDP1(hw);
                mask |= IXGBE_EIMS_GPI_SDP2(hw);
                fallthrough;
        case ixgbe_mac_X540:
        case ixgbe_mac_X550:
        case ixgbe_mac_X550EM_x:
        case ixgbe_mac_x550em_a:
                if (adapter->hw.device_id == IXGBE_DEV_ID_X550EM_X_SFP ||
                    adapter->hw.device_id == IXGBE_DEV_ID_X550EM_A_SFP ||
                    adapter->hw.device_id == IXGBE_DEV_ID_X550EM_A_SFP_N)
                        mask |= IXGBE_EIMS_GPI_SDP0(&adapter->hw);
                if (adapter->hw.phy.type == ixgbe_phy_x550em_ext_t)
                        mask |= IXGBE_EICR_GPI_SDP0_X540;
                mask |= IXGBE_EIMS_ECC;
                mask |= IXGBE_EIMS_MAILBOX;
                break;
        default:
                break;
        }

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

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

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

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

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

        IXGBE_WRITE_REG(hw, IXGBE_EICR, eicr);

        if (eicr & IXGBE_EICR_LSC)
                ixgbe_check_lsc(adapter);

        if (eicr & IXGBE_EICR_MAILBOX)
                ixgbe_msg_task(adapter);

        switch (hw->mac.type) {
        case ixgbe_mac_82599EB:
        case ixgbe_mac_X540:
        case ixgbe_mac_X550:
        case ixgbe_mac_X550EM_x:
        case ixgbe_mac_x550em_a:
                if (hw->phy.type == ixgbe_phy_x550em_ext_t &&
                    (eicr & IXGBE_EICR_GPI_SDP0_X540)) {
                        adapter->flags2 |= IXGBE_FLAG2_PHY_INTERRUPT;
                        ixgbe_service_event_schedule(adapter);
                        IXGBE_WRITE_REG(hw, IXGBE_EICR,
                                        IXGBE_EICR_GPI_SDP0_X540);
                }
                if (eicr & IXGBE_EICR_ECC) {
                        e_info(link, "Received ECC Err, initiating reset\n");
                        set_bit(__IXGBE_RESET_REQUESTED, &adapter->state);
                        ixgbe_service_event_schedule(adapter);
                        IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_ECC);
                }
                /* Handle Flow Director Full threshold interrupt */
                if (eicr & IXGBE_EICR_FLOW_DIR) {
                        int reinit_count = 0;
                        int i;
                        for (i = 0; i < adapter->num_tx_queues; i++) {
                                struct ixgbe_ring *ring = adapter->tx_ring[i];
                                if (test_and_clear_bit(__IXGBE_TX_FDIR_INIT_DONE,
                                                       &ring->state))
                                        reinit_count++;
                        }
                        if (reinit_count) {
                                /* no more flow director interrupts until after init */
                                IXGBE_WRITE_REG(hw, IXGBE_EIMC, IXGBE_EIMC_FLOW_DIR);
                                adapter->flags2 |= IXGBE_FLAG2_FDIR_REQUIRES_REINIT;
                                ixgbe_service_event_schedule(adapter);
                        }
                }
                ixgbe_check_sfp_event(adapter, eicr);
                ixgbe_check_overtemp_event(adapter, eicr);
                break;
        default:
                break;
        }

        ixgbe_check_fan_failure(adapter, eicr);

        if (unlikely(eicr & IXGBE_EICR_TIMESYNC))
                ixgbe_ptp_check_pps_event(adapter);

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

        return IRQ_HANDLED;
}

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

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

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

        return IRQ_HANDLED;
}

/**
 * ixgbe_poll - NAPI Rx polling callback
 * @napi: structure for representing this polling device
 * @budget: how many packets driver is allowed to clean
 *
 * This function is used for legacy and MSI, NAPI mode
 **/
int ixgbe_poll(struct napi_struct *napi, int budget)
{
        struct ixgbe_q_vector *q_vector =
                                container_of(napi, struct ixgbe_q_vector, napi);
        struct ixgbe_adapter *adapter = q_vector->adapter;
        struct ixgbe_ring *ring;
        int per_ring_budget, work_done = 0;
        bool clean_complete = true;

#ifdef CONFIG_IXGBE_DCA
        if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
                ixgbe_update_dca(q_vector);
#endif

        ixgbe_for_each_ring(ring, q_vector->tx) {
                bool wd = ring->xsk_pool ?
                          ixgbe_clean_xdp_tx_irq(q_vector, ring, budget) :
                          ixgbe_clean_tx_irq(q_vector, ring, budget);

                if (!wd)
                        clean_complete = false;
        }

        /* Exit if we are called by netpoll */
        if (budget <= 0)
                return budget;

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

        ixgbe_for_each_ring(ring, q_vector->rx) {
                int cleaned = ring->xsk_pool ?
                              ixgbe_clean_rx_irq_zc(q_vector, ring,
                                                    per_ring_budget) :
                              ixgbe_clean_rx_irq(q_vector, ring,
                                                 per_ring_budget);

                work_done += cleaned;
                if (cleaned >= per_ring_budget)
                        clean_complete = false;
        }

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

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

        return min(work_done, budget - 1);
}

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

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

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

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

        return 0;

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

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

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

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

        if (eicr & IXGBE_EICR_LSC)
                ixgbe_check_lsc(adapter);

        switch (hw->mac.type) {
        case ixgbe_mac_82599EB:
                ixgbe_check_sfp_event(adapter, eicr);
                fallthrough;
        case ixgbe_mac_X540:
        case ixgbe_mac_X550:
        case ixgbe_mac_X550EM_x:
        case ixgbe_mac_x550em_a:
                if (eicr & IXGBE_EICR_ECC) {
                        e_info(link, "Received ECC Err, initiating reset\n");
                        set_bit(__IXGBE_RESET_REQUESTED, &adapter->state);
                        ixgbe_service_event_schedule(adapter);
                        IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_ECC);
                }
                ixgbe_check_overtemp_event(adapter, eicr);
                break;
        default:
                break;
        }

        ixgbe_check_fan_failure(adapter, eicr);
        if (unlikely(eicr & IXGBE_EICR_TIMESYNC))
                ixgbe_ptp_check_pps_event(adapter);

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

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

        return IRQ_HANDLED;
}

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

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

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

        return err;
}

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

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

        if (!adapter->msix_entries)
                return;

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

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

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

                free_irq(entry->vector, q_vector);
        }

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

/**
 * ixgbe_irq_disable - Mask off interrupt generation on the NIC
 * @adapter: board private structure
 **/
static inline void ixgbe_irq_disable(struct ixgbe_adapter *adapter)
{
        switch (adapter->hw.mac.type) {
        case ixgbe_mac_82598EB:
                IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC, ~0);
                break;
        case ixgbe_mac_82599EB:
        case ixgbe_mac_X540:
        case ixgbe_mac_X550:
        case ixgbe_mac_X550EM_x:
        case ixgbe_mac_x550em_a:
                IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC, 0xFFFF0000);
                IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC_EX(0), ~0);
                IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC_EX(1), ~0);
                break;
        default:
                break;
        }
        IXGBE_WRITE_FLUSH(&adapter->hw);
        if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
                int vector;

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

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

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

        ixgbe_write_eitr(q_vector);

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

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

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

        ring->xsk_pool = NULL;
        if (ring_is_xdp(ring))
                ring->xsk_pool = ixgbe_xsk_pool(adapter, ring);

        /* disable queue to avoid issues while updating state */
        IXGBE_WRITE_REG(hw, IXGBE_TXDCTL(reg_idx), 0);
        IXGBE_WRITE_FLUSH(hw);

        IXGBE_WRITE_REG(hw, IXGBE_TDBAL(reg_idx),
                        (tdba & DMA_BIT_MASK(32)));
        IXGBE_WRITE_REG(hw, IXGBE_TDBAH(reg_idx), (tdba >> 32));
        IXGBE_WRITE_REG(hw, IXGBE_TDLEN(reg_idx),
                        ring->count * sizeof(union ixgbe_adv_tx_desc));
        IXGBE_WRITE_REG(hw, IXGBE_TDH(reg_idx), 0);
        IXGBE_WRITE_REG(hw, IXGBE_TDT(reg_idx), 0);
        ring->tail = adapter->io_addr + IXGBE_TDT(reg_idx);

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

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

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

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

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

        clear_bit(__IXGBE_HANG_CHECK_ARMED, &ring->state);

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

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

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

        /* poll to verify queue is enabled */
        do {
                usleep_range(1000, 2000);
                txdctl = IXGBE_READ_REG(hw, IXGBE_TXDCTL(reg_idx));
        } while (--wait_loop && !(txdctl & IXGBE_TXDCTL_ENABLE));
        if (!wait_loop)
                hw_dbg(hw, "Could not enable Tx Queue %d\n", reg_idx);
}

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

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

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

        /* set transmit pool layout */
        if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) {
                mtqc = IXGBE_MTQC_VT_ENA;
                if (tcs > 4)
                        mtqc |= IXGBE_MTQC_RT_ENA | IXGBE_MTQC_8TC_8TQ;
                else if (tcs > 1)
                        mtqc |= IXGBE_MTQC_RT_ENA | IXGBE_MTQC_4TC_4TQ;
                else if (adapter->ring_feature[RING_F_VMDQ].mask ==
                         IXGBE_82599_VMDQ_4Q_MASK)
                        mtqc |= IXGBE_MTQC_32VF;
                else
                        mtqc |= IXGBE_MTQC_64VF;
        } else {
                if (tcs > 4) {
                        mtqc = IXGBE_MTQC_RT_ENA | IXGBE_MTQC_8TC_8TQ;
                } else if (tcs > 1) {
                        mtqc = IXGBE_MTQC_RT_ENA | IXGBE_MTQC_4TC_4TQ;
                } else {
                        u8 max_txq = adapter->num_tx_queues +
                                adapter->num_xdp_queues;
                        if (max_txq > 63)
                                mtqc = IXGBE_MTQC_RT_ENA | IXGBE_MTQC_4TC_4TQ;
                        else
                                mtqc = IXGBE_MTQC_64Q_1PB;
                }
        }

        IXGBE_WRITE_REG(hw, IXGBE_MTQC, mtqc);

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

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

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

        ixgbe_setup_mtqc(adapter);

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

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

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

        srrctl |= IXGBE_SRRCTL_DROP_EN;

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

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

        srrctl &= ~IXGBE_SRRCTL_DROP_EN;

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

#ifdef CONFIG_IXGBE_DCB
void ixgbe_set_rx_drop_en(struct ixgbe_adapter *adapter)
#else
static void ixgbe_set_rx_drop_en(struct ixgbe_adapter *adapter)
#endif
{
        int i;
        bool pfc_en = adapter->dcb_cfg.pfc_mode_enable;

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

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

#define IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT 2

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

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

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

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

        /* configure the packet buffer length */
        if (rx_ring->xsk_pool) {
                u32 xsk_buf_len = xsk_pool_get_rx_frame_size(rx_ring->xsk_pool);

                /* If the MAC support setting RXDCTL.RLPML, the
                 * SRRCTL[n].BSIZEPKT is set to PAGE_SIZE and
                 * RXDCTL.RLPML is set to the actual UMEM buffer
                 * size. If not, then we are stuck with a 1k buffer
                 * size resolution. In this case frames larger than
                 * the UMEM buffer size viewed in a 1k resolution will
                 * be dropped.
                 */
                if (hw->mac.type != ixgbe_mac_82599EB)
                        srrctl |= PAGE_SIZE >> IXGBE_SRRCTL_BSIZEPKT_SHIFT;
                else
                        srrctl |= xsk_buf_len >> IXGBE_SRRCTL_BSIZEPKT_SHIFT;
        } else if (test_bit(__IXGBE_RX_3K_BUFFER, &rx_ring->state)) {
                srrctl |= IXGBE_RXBUFFER_3K >> IXGBE_SRRCTL_BSIZEPKT_SHIFT;
        } else {
                srrctl |= IXGBE_RXBUFFER_2K >> IXGBE_SRRCTL_BSIZEPKT_SHIFT;
        }

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

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

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

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

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

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

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

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

        return 0;
}

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

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

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

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

        /* Write redirection table to HW */
        for (i = 0; i < reta_entries; i++) {
                u16 pool = adapter->num_rx_pools;

                vfreta |= (u32)adapter->rss_indir_tbl[i] << (i & 0x3) * 8;
                if ((i & 3) != 3)
                        continue;

                while (pool--)
                        IXGBE_WRITE_REG(hw,
                                        IXGBE_PFVFRETA(i >> 2, VMDQ_P(pool)),
                                        vfreta);
                vfreta = 0;
        }
}

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

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

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

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

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

                adapter->rss_indir_tbl[i] = j;
        }

        ixgbe_store_reta(adapter);
}

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

        /* Fill out hash function seeds */
        for (i = 0; i < 10; i++) {
                u16 pool = adapter->num_rx_pools;

                while (pool--)
                        IXGBE_WRITE_REG(hw,
                                        IXGBE_PFVFRSSRK(i, VMDQ_P(pool)),
                                        *(adapter->rss_key + i));
        }

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

                adapter->rss_indir_tbl[i] = j;
        }

        ixgbe_store_vfreta(adapter);
}

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

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

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

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

                        /* Enable L3/L4 for Tx Switched packets only for X550,
                         * older devices do not support this feature
                         */
                        if (hw->mac.type >= ixgbe_mac_X550)
                                mrqc |= IXGBE_MRQC_L3L4TXSWEN;
                } else {
                        if (tcs > 4)
                                mrqc = IXGBE_MRQC_RTRSS8TCEN;
                        else if (tcs > 1)
                                mrqc = IXGBE_MRQC_RTRSS4TCEN;
                        else
                                mrqc = IXGBE_MRQC_RSSEN;
                }
        }

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

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

        if ((hw->mac.type >= ixgbe_mac_X550) &&
            (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)) {
                u16 pool = adapter->num_rx_pools;

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

                /* Setup RSS through the VF registers */
                ixgbe_setup_vfreta(adapter);
                vfmrqc = IXGBE_MRQC_RSSEN;
                vfmrqc |= rss_field;

                while (pool--)
                        IXGBE_WRITE_REG(hw,
                                        IXGBE_PFVFMRQC(VMDQ_P(pool)),
                                        vfmrqc);
        } else {
                ixgbe_setup_reta(adapter);
                mrqc |= rss_field;
                IXGBE_WRITE_REG(hw, IXGBE_MRQC, mrqc);
        }
}

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

        if (!ring_is_rsc_enabled(ring))
                return;

        rscctrl = IXGBE_READ_REG(hw, IXGBE_RSCCTL(reg_idx));
        rscctrl |= IXGBE_RSCCTL_RSCEN;
        /*
         * we must limit the number of descriptors so that the
         * total size of max desc * buf_len is not greater
         * than 65536
         */
        rscctrl |= IXGBE_RSCCTL_MAXDESC_16;
        IXGBE_WRITE_REG(hw, IXGBE_RSCCTL(reg_idx), rscctrl);
}

#define IXGBE_MAX_RX_DESC_POLL 10
static void ixgbe_rx_desc_queue_enable(struct ixgbe_adapter *adapter,
                                       struct ixgbe_ring *ring)
{
        struct ixgbe_hw *hw = &adapter->hw;
        int wait_loop = IXGBE_MAX_RX_DESC_POLL;
        u32 rxdctl;
        u8 reg_idx = ring->reg_idx;

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

        do {
                usleep_range(1000, 2000);
                rxdctl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(reg_idx));
        } while (--wait_loop && !(rxdctl & IXGBE_RXDCTL_ENABLE));

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

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

        xdp_rxq_info_unreg_mem_model(&ring->xdp_rxq);
        ring->xsk_pool = ixgbe_xsk_pool(adapter, ring);
        if (ring->xsk_pool) {
                WARN_ON(xdp_rxq_info_reg_mem_model(&ring->xdp_rxq,
                                                   MEM_TYPE_XSK_BUFF_POOL,
                                                   NULL));
                xsk_pool_set_rxq_info(ring->xsk_pool, &ring->xdp_rxq);
        } else {
                WARN_ON(xdp_rxq_info_reg_mem_model(&ring->xdp_rxq,
                                                   MEM_TYPE_PAGE_SHARED, NULL));
        }

        /* disable queue to avoid use of these values while updating state */
        rxdctl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(reg_idx));
        rxdctl &= ~IXGBE_RXDCTL_ENABLE;

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

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

        IXGBE_WRITE_REG(hw, IXGBE_RDH(reg_idx), 0);
        IXGBE_WRITE_REG(hw, IXGBE_RDT(reg_idx), 0);
        ring->tail = adapter->io_addr + IXGBE_RDT(reg_idx);

        ixgbe_configure_srrctl(adapter, ring);
        ixgbe_configure_rscctl(adapter, ring);

        if (hw->mac.type == ixgbe_mac_82598EB) {
                /*
                 * enable cache line friendly hardware writes:
                 * PTHRESH=32 descriptors (half the internal cache),
                 * this also removes ugly rx_no_buffer_count increment
                 * HTHRESH=4 descriptors (to minimize latency on fetch)
                 * WTHRESH=8 burst writeback up to two cache lines
                 */
                rxdctl &= ~0x3FFFFF;
                rxdctl |=  0x080420;
#if (PAGE_SIZE < 8192)
        /* RXDCTL.RLPML does not work on 82599 */
        } else if (hw->mac.type != ixgbe_mac_82599EB) {
                rxdctl &= ~(IXGBE_RXDCTL_RLPMLMASK |
                            IXGBE_RXDCTL_RLPML_EN);

                /* Limit the maximum frame size so we don't overrun the skb.
                 * This can happen in SRIOV mode when the MTU of the VF is
                 * higher than the MTU of the PF.
                 */
                if (ring_uses_build_skb(ring) &&
                    !test_bit(__IXGBE_RX_3K_BUFFER, &ring->state))
                        rxdctl |= IXGBE_MAX_2K_FRAME_BUILD_SKB |
                                  IXGBE_RXDCTL_RLPML_EN;
#endif
        }

        ring->rx_offset = ixgbe_rx_offset(ring);

        if (ring->xsk_pool && hw->mac.type != ixgbe_mac_82599EB) {
                u32 xsk_buf_len = xsk_pool_get_rx_frame_size(ring->xsk_pool);

                rxdctl &= ~(IXGBE_RXDCTL_RLPMLMASK |
                            IXGBE_RXDCTL_RLPML_EN);
                rxdctl |= xsk_buf_len | IXGBE_RXDCTL_RLPML_EN;

                ring->rx_buf_len = xsk_buf_len;
        }

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

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

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

        ixgbe_rx_desc_queue_enable(adapter, ring);
        if (ring->xsk_pool)
                ixgbe_alloc_rx_buffers_zc(ring, ixgbe_desc_unused(ring));
        else
                ixgbe_alloc_rx_buffers(ring, ixgbe_desc_unused(ring));
}

static void ixgbe_setup_psrtype(struct ixgbe_adapter *adapter)
{
        struct ixgbe_hw *hw = &adapter->hw;
        int rss_i = adapter->ring_feature[RING_F_RSS].indices;
        u16 pool = adapter->num_rx_pools;

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

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

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

        while (pool--)
                IXGBE_WRITE_REG(hw, IXGBE_PSRTYPE(VMDQ_P(pool)), psrtype);
}

static void ixgbe_configure_virtualization(struct ixgbe_adapter *adapter)
{
        struct ixgbe_hw *hw = &adapter->hw;
        u16 pool = adapter->num_rx_pools;
        u32 reg_offset, vf_shift, vmolr;
        u32 gcr_ext, vmdctl;
        int i;

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

        vmdctl = IXGBE_READ_REG(hw, IXGBE_VT_CTL);
        vmdctl |= IXGBE_VMD_CTL_VMDQ_EN;
        vmdctl &= ~IXGBE_VT_CTL_POOL_MASK;
        vmdctl |= VMDQ_P(0) << IXGBE_VT_CTL_POOL_SHIFT;
        vmdctl |= IXGBE_VT_CTL_REPLEN;
        IXGBE_WRITE_REG(hw, IXGBE_VT_CTL, vmdctl);

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

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

        /* Enable only the PF's pool for Tx/Rx */
        IXGBE_WRITE_REG(hw, IXGBE_VFRE(reg_offset), GENMASK(31, vf_shift));
        IXGBE_WRITE_REG(hw, IXGBE_VFRE(reg_offset ^ 1), reg_offset - 1);
        IXGBE_WRITE_REG(hw, IXGBE_VFTE(reg_offset), GENMASK(31, vf_shift));
        IXGBE_WRITE_REG(hw, IXGBE_VFTE(reg_offset ^ 1), reg_offset - 1);
        if (adapter->bridge_mode == BRIDGE_MODE_VEB)
                IXGBE_WRITE_REG(hw, IXGBE_PFDTXGSWC, IXGBE_PFDTXGSWC_VT_LBEN);

        /* Map PF MAC address in RAR Entry 0 to first pool following VFs */
        hw->mac.ops.set_vmdq(hw, 0, VMDQ_P(0));

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

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

        IXGBE_WRITE_REG(hw, IXGBE_GCR_EXT, gcr_ext);

        for (i = 0; i < adapter->num_vfs; i++) {
                /* configure spoof checking */
                ixgbe_ndo_set_vf_spoofchk(adapter->netdev, i,
                                          adapter->vfinfo[i].spoofchk_enabled);

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

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

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

#endif /* IXGBE_FCOE */

        /* adjust max frame to be at least the size of a standard frame */
        if (max_frame < (ETH_FRAME_LEN + ETH_FCS_LEN))
                max_frame = (ETH_FRAME_LEN + ETH_FCS_LEN);

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

                IXGBE_WRITE_REG(hw, IXGBE_MHADD, mhadd);
        }

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

        /*
         * Setup the HW Rx Head and Tail Descriptor Pointers and
         * the Base and Length of the Rx Descriptor Ring
         */
        for (i = 0; i < adapter->num_rx_queues; i++) {
                rx_ring = adapter->rx_ring[i];

                clear_ring_rsc_enabled(rx_ring);
                clear_bit(__IXGBE_RX_3K_BUFFER, &rx_ring->state);
                clear_bit(__IXGBE_RX_BUILD_SKB_ENABLED, &rx_ring->state);

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

                if (test_bit(__IXGBE_RX_FCOE, &rx_ring->state))
                        set_bit(__IXGBE_RX_3K_BUFFER, &rx_ring->state);

                if (adapter->flags2 & IXGBE_FLAG2_RX_LEGACY)
                        continue;

                set_bit(__IXGBE_RX_BUILD_SKB_ENABLED, &rx_ring->state);

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

                if (IXGBE_2K_TOO_SMALL_WITH_PADDING ||
                    (max_frame > (ETH_FRAME_LEN + ETH_FCS_LEN)))
                        set_bit(__IXGBE_RX_3K_BUFFER, &rx_ring->state);
#endif
        }
}

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

        switch (hw->mac.type) {
        case ixgbe_mac_82598EB:
                /*
                 * For VMDq support of different descriptor types or
                 * buffer sizes through the use of multiple SRRCTL
                 * registers, RDRXCTL.MVMEN must be set to 1
                 *
                 * also, the manual doesn't mention it clearly but DCA hints
                 * will only use queue 0's tags unless this bit is set.  Side
                 * effects of setting this bit are only that SRRCTL must be
                 * fully programmed [0..15]
                 */
                rdrxctl |= IXGBE_RDRXCTL_MVMEN;
                break;
        case ixgbe_mac_X550:
        case ixgbe_mac_X550EM_x:
        case ixgbe_mac_x550em_a:
                if (adapter->num_vfs)
                        rdrxctl |= IXGBE_RDRXCTL_PSP;
                fallthrough;
        case ixgbe_mac_82599EB:
        case ixgbe_mac_X540:
                /* Disable RSC for ACK packets */
                IXGBE_WRITE_REG(hw, IXGBE_RSCDBU,
                   (IXGBE_RSCDBU_RSCACKDIS | IXGBE_READ_REG(hw, IXGBE_RSCDBU)));
                rdrxctl &= ~IXGBE_RDRXCTL_RSCFRSTSIZE;
                /* hardware requires some bits to be set by default */
                rdrxctl |= (IXGBE_RDRXCTL_RSCACKC | IXGBE_RDRXCTL_FCOE_WRFIX);
                rdrxctl |= IXGBE_RDRXCTL_CRCSTRIP;
                break;
        default:
                /* We should do nothing since we don't know this hardware */
                return;
        }

        IXGBE_WRITE_REG(hw, IXGBE_RDRXCTL, rdrxctl);
}

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

        /* disable receives while setting up the descriptors */
        hw->mac.ops.disable_rx(hw);

        ixgbe_setup_psrtype(adapter);
        ixgbe_setup_rdrxctl(adapter);

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

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

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

        /* set_rx_buffer_len must be called before ring initialization */
        ixgbe_set_rx_buffer_len(adapter);

        /*
         * Setup the HW Rx Head and Tail Descriptor Pointers and
         * the Base and Length of the Rx Descriptor Ring
         */
        for (i = 0; i < adapter->num_rx_queues; i++)
                ixgbe_configure_rx_ring(adapter, adapter->rx_ring[i]);

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

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

static int ixgbe_vlan_rx_add_vid(struct net_device *netdev,
                                 __be16 proto, u16 vid)
{
        struct ixgbe_adapter *adapter = netdev_priv(netdev);
        struct ixgbe_hw *hw = &adapter->hw;

        /* add VID to filter table */
        if (!vid || !(adapter->flags2 & IXGBE_FLAG2_VLAN_PROMISC))
                hw->mac.ops.set_vfta(&adapter->hw, vid, VMDQ_P(0), true, !!vid);

        set_bit(vid, adapter->active_vlans);

        return 0;
}

static int ixgbe_find_vlvf_entry(struct ixgbe_hw *hw, u32 vlan)
{
        u32 vlvf;
        int idx;

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

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

        return idx;
}

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

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

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

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

static int ixgbe_vlan_rx_kill_vid(struct net_device *netdev,
                                  __be16 proto, u16 vid)
{
        struct ixgbe_adapter *adapter = netdev_priv(netdev);
        struct ixgbe_hw *hw = &adapter->hw;

        /* remove VID from filter table */
        if (vid && !(adapter->flags2 & IXGBE_FLAG2_VLAN_PROMISC))
                hw->mac.ops.set_vfta(hw, vid, VMDQ_P(0), false, true);

        clear_bit(vid, adapter->active_vlans);

        return 0;
}

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

        switch (hw->mac.type) {
        case ixgbe_mac_82598EB:
                vlnctrl = IXGBE_READ_REG(hw, IXGBE_VLNCTRL);
                vlnctrl &= ~IXGBE_VLNCTRL_VME;
                IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl);
                break;
        case ixgbe_mac_82599EB:
        case ixgbe_mac_X540:
        case ixgbe_mac_X550:
        case ixgbe_mac_X550EM_x:
        case ixgbe_mac_x550em_a:
                for (i = 0; i < adapter->num_rx_queues; i++) {
                        struct ixgbe_ring *ring = adapter->rx_ring[i];

                        if (!netif_is_ixgbe(ring->netdev))
                                continue;

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

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

        switch (hw->mac.type) {
        case ixgbe_mac_82598EB:
                vlnctrl = IXGBE_READ_REG(hw, IXGBE_VLNCTRL);
                vlnctrl |= IXGBE_VLNCTRL_VME;
                IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl);
                break;
        case ixgbe_mac_82599EB:
        case ixgbe_mac_X540:
        case ixgbe_mac_X550:
        case ixgbe_mac_X550EM_x:
        case ixgbe_mac_x550em_a:
                for (i = 0; i < adapter->num_rx_queues; i++) {
                        struct ixgbe_ring *ring = adapter->rx_ring[i];

                        if (!netif_is_ixgbe(ring->netdev))
                                continue;

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

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

        vlnctrl = IXGBE_READ_REG(hw, IXGBE_VLNCTRL);

        if (adapter->flags & IXGBE_FLAG_VMDQ_ENABLED) {
        /* For VMDq and SR-IOV we must leave VLAN filtering enabled */
                vlnctrl |= IXGBE_VLNCTRL_VFE;
                IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl);
        } else {
                vlnctrl &= ~IXGBE_VLNCTRL_VFE;
                IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl);
                return;
        }

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

        /* Set VLAN filtering to enabled */
        vlnctrl = IXGBE_READ_REG(hw, IXGBE_VLNCTRL);
        vlnctrl |= IXGBE_VLNCTRL_VFE;
        IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl);

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

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

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

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

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

        ixgbe_vlan_rx_add_vid(adapter->netdev, htons(ETH_P_8021Q), 0);

        for_each_set_bit_from(vid, adapter->active_vlans, VLAN_N_VID)
                ixgbe_vlan_rx_add_vid(adapter->netdev, htons(ETH_P_8021Q), vid);
}

/**
 * ixgbe_write_mc_addr_list - write multicast addresses to MTA
 * @netdev: network interface device structure
 *
 * Writes multicast address list to the MTA hash table.
 * Returns: -ENOMEM on failure
 *                0 on no addresses written
 *                X on writing X addresses to MTA
 **/
static int ixgbe_write_mc_addr_list(struct net_device *netdev)
{
        struct ixgbe_adapter *adapter = netdev_priv(netdev);
        struct ixgbe_hw *hw = &adapter->hw;

        if (!netif_running(netdev))
                return 0;

        if (hw->mac.ops.update_mc_addr_list)
                hw->mac.ops.update_mc_addr_list(hw, netdev);
        else
                return -ENOMEM;

#ifdef CONFIG_PCI_IOV
        ixgbe_restore_vf_multicasts(adapter);
#endif

        return netdev_mc_count(netdev);
}

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

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

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

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

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

                mac_table->state &= ~IXGBE_MAC_STATE_MODIFIED;

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

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

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

        ixgbe_sync_mac_table(adapter);
}

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

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

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

                count++;
        }

        return count;
}

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

        memcpy(&mac_table->addr, hw->mac.addr, ETH_ALEN);
        mac_table->pool = VMDQ_P(0);

        mac_table->state = IXGBE_MAC_STATE_DEFAULT | IXGBE_MAC_STATE_IN_USE;

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

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

        if (is_zero_ether_addr(addr))
                return -EINVAL;

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

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

                mac_table->state |= IXGBE_MAC_STATE_MODIFIED |
                                    IXGBE_MAC_STATE_IN_USE;

                ixgbe_sync_mac_table(adapter);

                return i;
        }

        return -ENOMEM;
}

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

        if (is_zero_ether_addr(addr))
                return -EINVAL;

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

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

                ixgbe_sync_mac_table(adapter);

                return 0;
        }

        return -ENOMEM;
}

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

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

        return min_t(int, ret, 0);
}

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

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

        return 0;
}

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

        /* Check for Promiscuous and All Multicast modes */
        fctrl = IXGBE_READ_REG(hw, IXGBE_FCTRL);

        /* set all bits that we expect to always be set */
        fctrl &= ~IXGBE_FCTRL_SBP; /* disable store-bad-packets */
        fctrl |= IXGBE_FCTRL_BAM;
        fctrl |= IXGBE_FCTRL_DPF; /* discard pause frames when FC enabled */
        fctrl |= IXGBE_FCTRL_PMCF;

        /* clear the bits we are changing the status of */
        fctrl &= ~(IXGBE_FCTRL_UPE | IXGBE_FCTRL_MPE);
        if (netdev->flags & IFF_PROMISC) {
                hw->addr_ctrl.user_set_promisc = true;
                fctrl |= (IXGBE_FCTRL_UPE | IXGBE_FCTRL_MPE);
                vmolr |= IXGBE_VMOLR_MPE;
                features &= ~NETIF_F_HW_VLAN_CTAG_FILTER;
        } else {
                if (netdev->flags & IFF_ALLMULTI) {
                        fctrl |= IXGBE_FCTRL_MPE;
                        vmolr |= IXGBE_VMOLR_MPE;
                }
                hw->addr_ctrl.user_set_promisc = false;
        }

        /*
         * Write addresses to available RAR registers, if there is not
         * sufficient space to store all the addresses then enable
         * unicast promiscuous mode
         */
        if (__dev_uc_sync(netdev, ixgbe_uc_sync, ixgbe_uc_unsync)) {
                fctrl |= IXGBE_FCTRL_UPE;
                vmolr |= IXGBE_VMOLR_ROPE;
        }

        /* Write addresses to the MTA, if the attempt fails
         * then we should just turn on promiscuous mode so
         * that we can at least receive multicast traffic
         */
        count = ixgbe_write_mc_addr_list(netdev);
        if (count < 0) {
                fctrl |= IXGBE_FCTRL_MPE;
                vmolr |= IXGBE_VMOLR_MPE;
        } else if (count) {
                vmolr |= IXGBE_VMOLR_ROMPE;
        }

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

        /* This is useful for sniffing bad packets. */
        if (features & NETIF_F_RXALL) {
                /* UPE and MPE will be handled by normal PROMISC logic
                 * in e1000e_set_rx_mode */
                fctrl |= (IXGBE_FCTRL_SBP | /* Receive bad packets */
                          IXGBE_FCTRL_BAM | /* RX All Bcast Pkts */
                          IXGBE_FCTRL_PMCF); /* RX All MAC Ctrl Pkts */

                fctrl &= ~(IXGBE_FCTRL_DPF);
                /* NOTE:  VLAN filtering is disabled by setting PROMISC */
        }

        IXGBE_WRITE_REG(hw, IXGBE_FCTRL, fctrl);

        if (features & NETIF_F_HW_VLAN_CTAG_RX)
                ixgbe_vlan_strip_enable(adapter);
        else
                ixgbe_vlan_strip_disable(adapter);

        if (features & NETIF_F_HW_VLAN_CTAG_FILTER)
                ixgbe_vlan_promisc_disable(adapter);
        else
                ixgbe_vlan_promisc_enable(adapter);
}

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

        for (q_idx = 0; q_idx < adapter->num_q_vectors; q_idx++)
                napi_enable(&adapter->q_vector[q_idx]->napi);
}

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

        for (q_idx = 0; q_idx < adapter->num_q_vectors; q_idx++)
                napi_disable(&adapter->q_vector[q_idx]->napi);
}

static int ixgbe_udp_tunnel_sync(struct net_device *dev, unsigned int table)
{
        struct ixgbe_adapter *adapter = netdev_priv(dev);
        struct ixgbe_hw *hw = &adapter->hw;
        struct udp_tunnel_info ti;

        udp_tunnel_nic_get_port(dev, table, 0, &ti);
        if (ti.type == UDP_TUNNEL_TYPE_VXLAN)
                adapter->vxlan_port = ti.port;
        else
                adapter->geneve_port = ti.port;

        IXGBE_WRITE_REG(hw, IXGBE_VXLANCTRL,
                        ntohs(adapter->vxlan_port) |
                        ntohs(adapter->geneve_port) <<
                                IXGBE_VXLANCTRL_GENEVE_UDPPORT_SHIFT);
        return 0;
}

static const struct udp_tunnel_nic_info ixgbe_udp_tunnels_x550 = {
        .sync_table     = ixgbe_udp_tunnel_sync,
        .flags          = UDP_TUNNEL_NIC_INFO_IPV4_ONLY,
        .tables         = {
                { .n_entries = 1, .tunnel_types = UDP_TUNNEL_TYPE_VXLAN,  },
        },
};

static const struct udp_tunnel_nic_info ixgbe_udp_tunnels_x550em_a = {
        .sync_table     = ixgbe_udp_tunnel_sync,
        .flags          = UDP_TUNNEL_NIC_INFO_IPV4_ONLY,
        .tables         = {
                { .n_entries = 1, .tunnel_types = UDP_TUNNEL_TYPE_VXLAN,  },
                { .n_entries = 1, .tunnel_types = UDP_TUNNEL_TYPE_GENEVE, },
        },
};

#ifdef CONFIG_IXGBE_DCB
/**
 * ixgbe_configure_dcb - Configure DCB hardware
 * @adapter: ixgbe adapter struct
 *
 * This is called by the driver on open to configure the DCB hardware.
 * This is also called by the gennetlink interface when reconfiguring
 * the DCB state.
 */
static void ixgbe_configure_dcb(struct ixgbe_adapter *adapter)
{
        struct ixgbe_hw *hw = &adapter->hw;
        int max_frame = adapter->netdev->mtu + ETH_HLEN + ETH_FCS_LEN;

        if (!(adapter->flags & IXGBE_FLAG_DCB_ENABLED)) {
                if (hw->mac.type == ixgbe_mac_82598EB)
                        netif_set_gso_max_size(adapter->netdev, 65536);
                return;
        }

        if (hw->mac.type == ixgbe_mac_82598EB)
                netif_set_gso_max_size(adapter->netdev, 32768);

#ifdef IXGBE_FCOE
        if (adapter->netdev->features & NETIF_F_FCOE_MTU)
                max_frame = max(max_frame, IXGBE_FCOE_JUMBO_FRAME_SIZE);
#endif

        /* reconfigure the hardware */
        if (adapter->dcbx_cap & DCB_CAP_DCBX_VER_CEE) {
                ixgbe_dcb_calculate_tc_credits(hw, &adapter->dcb_cfg, max_frame,
                                                DCB_TX_CONFIG);
                ixgbe_dcb_calculate_tc_credits(hw, &adapter->dcb_cfg, max_frame,
                                                DCB_RX_CONFIG);
                ixgbe_dcb_hw_config(hw, &adapter->dcb_cfg);
        } else if (adapter->ixgbe_ieee_ets && adapter->ixgbe_ieee_pfc) {
                ixgbe_dcb_hw_ets(&adapter->hw,
                                 adapter->ixgbe_ieee_ets,
                                 max_frame);
                ixgbe_dcb_hw_pfc_config(&adapter->hw,
                                        adapter->ixgbe_ieee_pfc->pfc_en,
                                        adapter->ixgbe_ieee_ets->prio_tc);
        }

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

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

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

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

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

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

#ifdef IXGBE_FCOE
        /* FCoE traffic class uses FCOE jumbo frames */
        if ((dev->features & NETIF_F_FCOE_MTU) &&
            (tc < IXGBE_FCOE_JUMBO_FRAME_SIZE) &&
            (pb == ixgbe_fcoe_get_tc(adapter)))
                tc = IXGBE_FCOE_JUMBO_FRAME_SIZE;
#endif

        /* Calculate delay value for device */
        switch (hw->mac.type) {
        case ixgbe_mac_X540:
        case ixgbe_mac_X550:
        case ixgbe_mac_X550EM_x:
        case ixgbe_mac_x550em_a:
                dv_id = IXGBE_DV_X540(link, tc);
                break;
        default:
                dv_id = IXGBE_DV(link, tc);
                break;
        }

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

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

        marker = rx_pba - kb;

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

        return marker;
}

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

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

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

        /* Calculate delay value for device */
        switch (hw->mac.type) {
        case ixgbe_mac_X540:
        case ixgbe_mac_X550:
        case ixgbe_mac_X550EM_x:
        case ixgbe_mac_x550em_a:
                dv_id = IXGBE_LOW_DV_X540(tc);
                break;
        default:
                dv_id = IXGBE_LOW_DV(tc);
                break;
        }

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

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

        if (!num_tc)
                num_tc = 1;

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

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

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

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

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

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

static void ixgbe_fdir_filter_restore(struct ixgbe_adapter *adapter)
{
        struct ixgbe_hw *hw = &adapter->hw;
        struct hlist_node *node2;
        struct ixgbe_fdir_filter *filter;
        u8 queue;

        spin_lock(&adapter->fdir_perfect_lock);

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

        hlist_for_each_entry_safe(filter, node2,
                                  &adapter->fdir_filter_list, fdir_node) {
                if (filter->action == IXGBE_FDIR_DROP_QUEUE) {
                        queue = IXGBE_FDIR_DROP_QUEUE;
                } else {
                        u32 ring = ethtool_get_flow_spec_ring(filter->action);
                        u8 vf = ethtool_get_flow_spec_ring_vf(filter->action);

                        if (!vf && (ring >= adapter->num_rx_queues)) {
                                e_err(drv, "FDIR restore failed without VF, ring: %u\n",
                                      ring);
                                continue;
                        } else if (vf &&
                                   ((vf > adapter->num_vfs) ||
                                     ring >= adapter->num_rx_queues_per_pool)) {
                                e_err(drv, "FDIR restore failed with VF, vf: %hhu, ring: %u\n",
                                      vf, ring);
                                continue;
                        }

                        /* Map the ring onto the absolute queue index */
                        if (!vf)
                                queue = adapter->rx_ring[ring]->reg_idx;
                        else
                                queue = ((vf - 1) *
                                        adapter->num_rx_queues_per_pool) + ring;
                }

                ixgbe_fdir_write_perfect_filter_82599(hw,
                                &filter->filter, filter->sw_idx, queue);
        }

        spin_unlock(&adapter->fdir_perfect_lock);
}

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

        if (rx_ring->xsk_pool) {
                ixgbe_xsk_clean_rx_ring(rx_ring);
                goto skip_free;
        }

        /* Free all the Rx ring sk_buffs */
        while (i != rx_ring->next_to_alloc) {
                if (rx_buffer->skb) {
                        struct sk_buff *skb = rx_buffer->skb;
                        if (IXGBE_CB(skb)->page_released)
                                dma_unmap_page_attrs(rx_ring->dev,
                                                     IXGBE_CB(skb)->dma,
                                                     ixgbe_rx_pg_size(rx_ring),
                                                     DMA_FROM_DEVICE,
                                                     IXGBE_RX_DMA_ATTR);
                        dev_kfree_skb(skb);
                }

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

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

                i++;
                rx_buffer++;
                if (i == rx_ring->count) {
                        i = 0;
                        rx_buffer = rx_ring->rx_buffer_info;
                }
        }

skip_free:
        rx_ring->next_to_alloc = 0;
        rx_ring->next_to_clean = 0;
        rx_ring->next_to_use = 0;
}

static int ixgbe_fwd_ring_up(struct ixgbe_adapter *adapter,
                             struct ixgbe_fwd_adapter *accel)
{
        u16 rss_i = adapter->ring_feature[RING_F_RSS].indices;
        int num_tc = netdev_get_num_tc(adapter->netdev);
        struct net_device *vdev = accel->netdev;
        int i, baseq, err;

        baseq = accel->pool * adapter->num_rx_queues_per_pool;
        netdev_dbg(vdev, "pool %i:%i queues %i:%i\n",
                   accel->pool, adapter->num_rx_pools,
                   baseq, baseq + adapter->num_rx_queues_per_pool);

        accel->rx_base_queue = baseq;
        accel->tx_base_queue = baseq;

        /* record configuration for macvlan interface in vdev */
        for (i = 0; i < num_tc; i++)
                netdev_bind_sb_channel_queue(adapter->netdev, vdev,
                                             i, rss_i, baseq + (rss_i * i));

        for (i = 0; i < adapter->num_rx_queues_per_pool; i++)
                adapter->rx_ring[baseq + i]->netdev = vdev;

        /* Guarantee all rings are updated before we update the
         * MAC address filter.
         */
        wmb();

        /* ixgbe_add_mac_filter will return an index if it succeeds, so we
         * need to only treat it as an error value if it is negative.
         */
        err = ixgbe_add_mac_filter(adapter, vdev->dev_addr,
                                   VMDQ_P(accel->pool));
        if (err >= 0)
                return 0;

        /* if we cannot add the MAC rule then disable the offload */
        macvlan_release_l2fw_offload(vdev);

        for (i = 0; i < adapter->num_rx_queues_per_pool; i++)
                adapter->rx_ring[baseq + i]->netdev = NULL;

        netdev_err(vdev, "L2FW offload disabled due to L2 filter error\n");

        /* unbind the queues and drop the subordinate channel config */
        netdev_unbind_sb_channel(adapter->netdev, vdev);
        netdev_set_sb_channel(vdev, 0);

        clear_bit(accel->pool, adapter->fwd_bitmask);
        kfree(accel);

        return err;
}

static int ixgbe_macvlan_up(struct net_device *vdev,
                            struct netdev_nested_priv *priv)
{
        struct ixgbe_adapter *adapter = (struct ixgbe_adapter *)priv->data;
        struct ixgbe_fwd_adapter *accel;

        if (!netif_is_macvlan(vdev))
                return 0;

        accel = macvlan_accel_priv(vdev);
        if (!accel)
                return 0;

        ixgbe_fwd_ring_up(adapter, accel);

        return 0;
}

static void ixgbe_configure_dfwd(struct ixgbe_adapter *adapter)
{
        struct netdev_nested_priv priv = {
                .data = (void *)adapter,
        };

        netdev_walk_all_upper_dev_rcu(adapter->netdev,
                                      ixgbe_macvlan_up, &priv);
}

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

        ixgbe_configure_pb(adapter);
#ifdef CONFIG_IXGBE_DCB
        ixgbe_configure_dcb(adapter);
#endif
        /*
         * We must restore virtualization before VLANs or else
         * the VLVF registers will not be populated
         */
        ixgbe_configure_virtualization(adapter);

        ixgbe_set_rx_mode(adapter->netdev);
        ixgbe_restore_vlan(adapter);
        ixgbe_ipsec_restore(adapter);

        switch (hw->mac.type) {
        case ixgbe_mac_82599EB:
        case ixgbe_mac_X540:
                hw->mac.ops.disable_rx_buff(hw);
                break;
        default:
                break;
        }

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

        switch (hw->mac.type) {
        case ixgbe_mac_82599EB:
        case ixgbe_mac_X540:
                hw->mac.ops.enable_rx_buff(hw);
                break;
        default:
                break;
        }

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

#ifdef IXGBE_FCOE
        /* configure FCoE L2 filters, redirection table, and Rx control */
        ixgbe_configure_fcoe(adapter);

#endif /* IXGBE_FCOE */
        ixgbe_configure_tx(adapter);
        ixgbe_configure_rx(adapter);
        ixgbe_configure_dfwd(adapter);
}

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

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

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

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

        if (ret)
                return ret;

        speed = hw->phy.autoneg_advertised;
        if (!speed && hw->mac.ops.get_link_capabilities) {
                ret = hw->mac.ops.get_link_capabilities(hw, &speed,
                                                        &autoneg);
                speed &= ~(IXGBE_LINK_SPEED_5GB_FULL |
                           IXGBE_LINK_SPEED_2_5GB_FULL);
        }

        if (ret)
                return ret;

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

        return ret;
}

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

        if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
                gpie = IXGBE_GPIE_MSIX_MODE | IXGBE_GPIE_PBA_SUPPORT |
                       IXGBE_GPIE_OCD;
                gpie |= IXGBE_GPIE_EIAME;
                /*
                 * use EIAM to auto-mask when MSI-X interrupt is asserted
                 * this saves a register write for every interrupt
                 */
                switch (hw->mac.type) {
                case ixgbe_mac_82598EB:
                        IXGBE_WRITE_REG(hw, IXGBE_EIAM, IXGBE_EICS_RTX_QUEUE);
                        break;
                case ixgbe_mac_82599EB:
                case ixgbe_mac_X540:
                case ixgbe_mac_X550:
                case ixgbe_mac_X550EM_x:
                case ixgbe_mac_x550em_a:
                default:
                        IXGBE_WRITE_REG(hw, IXGBE_EIAM_EX(0), 0xFFFFFFFF);
                        IXGBE_WRITE_REG(hw, IXGBE_EIAM_EX(1), 0xFFFFFFFF);
                        break;
                }
        } else {
                /* legacy interrupts, use EIAM to auto-mask when reading EICR,
                 * specifically only auto mask tx and rx interrupts */
                IXGBE_WRITE_REG(hw, IXGBE_EIAM, IXGBE_EICS_RTX_QUEUE);
        }

        /* XXX: to interrupt immediately for EICS writes, enable this */
        /* gpie |= IXGBE_GPIE_EIMEN; */

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

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

        /* Enable Thermal over heat sensor interrupt */
        if (adapter->flags2 & IXGBE_FLAG2_TEMP_SENSOR_CAPABLE) {
                switch (adapter->hw.mac.type) {
                case ixgbe_mac_82599EB:
                        gpie |= IXGBE_SDP0_GPIEN_8259X;
                        break;
                default:
                        break;
                }
        }

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

        switch (hw->mac.type) {
        case ixgbe_mac_82599EB:
                gpie |= IXGBE_SDP1_GPIEN_8259X | IXGBE_SDP2_GPIEN_8259X;
                break;
        case ixgbe_mac_X550EM_x:
        case ixgbe_mac_x550em_a:
                gpie |= IXGBE_SDP0_GPIEN_X540;
                break;
        default:
                break;
        }

        IXGBE_WRITE_REG(hw, IXGBE_GPIE, gpie);
}

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

        ixgbe_get_hw_control(adapter);
        ixgbe_setup_gpie(adapter);

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

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

        if (hw->phy.ops.set_phy_power)
                hw->phy.ops.set_phy_power(hw, true);

        smp_mb__before_atomic();
        clear_bit(__IXGBE_DOWN, &adapter->state);
        ixgbe_napi_enable_all(adapter);

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

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

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

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

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

void ixgbe_reinit_locked(struct ixgbe_adapter *adapter)
{
        /* put off any impending NetWatchDogTimeout */
        netif_trans_update(adapter->netdev);

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

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

        ixgbe_up_complete(adapter);
}

static unsigned long ixgbe_get_completion_timeout(struct ixgbe_adapter *adapter)
{
        u16 devctl2;

        pcie_capability_read_word(adapter->pdev, PCI_EXP_DEVCTL2, &devctl2);

        switch (devctl2 & IXGBE_PCIDEVCTRL2_TIMEO_MASK) {
        case IXGBE_PCIDEVCTRL2_17_34s:
        case IXGBE_PCIDEVCTRL2_4_8s:
                /* For now we cap the upper limit on delay to 2 seconds
                 * as we end up going up to 34 seconds of delay in worst
                 * case timeout value.
                 */
        case IXGBE_PCIDEVCTRL2_1_2s:
                return 2000000ul;       /* 2.0 s */
        case IXGBE_PCIDEVCTRL2_260_520ms:
                return 520000ul;        /* 520 ms */
        case IXGBE_PCIDEVCTRL2_65_130ms:
                return 130000ul;        /* 130 ms */
        case IXGBE_PCIDEVCTRL2_16_32ms:
                return 32000ul;         /* 32 ms */
        case IXGBE_PCIDEVCTRL2_1_2ms:
                return 2000ul;          /* 2 ms */
        case IXGBE_PCIDEVCTRL2_50_100us:
                return 100ul;           /* 100 us */
        case IXGBE_PCIDEVCTRL2_16_32ms_def:
                return 32000ul;         /* 32 ms */
        default:
                break;
        }

        /* We shouldn't need to hit this path, but just in case default as
         * though completion timeout is not supported and support 32ms.
         */
        return 32000ul;
}

void ixgbe_disable_rx(struct ixgbe_adapter *adapter)
{
        unsigned long wait_delay, delay_interval;
        struct ixgbe_hw *hw = &adapter->hw;
        int i, wait_loop;
        u32 rxdctl;

        /* disable receives */
        hw->mac.ops.disable_rx(hw);

        if (ixgbe_removed(hw->hw_addr))
                return;

        /* disable all enabled Rx queues */
        for (i = 0; i < adapter->num_rx_queues; i++) {
                struct ixgbe_ring *ring = adapter->rx_ring[i];
                u8 reg_idx = ring->reg_idx;

                rxdctl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(reg_idx));
                rxdctl &= ~IXGBE_RXDCTL_ENABLE;
                rxdctl |= IXGBE_RXDCTL_SWFLSH;

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

        /* RXDCTL.EN may not change on 82598 if link is down, so skip it */
        if (hw->mac.type == ixgbe_mac_82598EB &&
            !(IXGBE_READ_REG(hw, IXGBE_LINKS) & IXGBE_LINKS_UP))
                return;

        /* Determine our minimum delay interval. We will increase this value
         * with each subsequent test. This way if the device returns quickly
         * we should spend as little time as possible waiting, however as
         * the time increases we will wait for larger periods of time.
         *
         * The trick here is that we increase the interval using the
         * following pattern: 1x 3x 5x 7x 9x 11x 13x 15x 17x 19x. The result
         * of that wait is that it totals up to 100x whatever interval we
         * choose. Since our minimum wait is 100us we can just divide the
         * total timeout by 100 to get our minimum delay interval.
         */
        delay_interval = ixgbe_get_completion_timeout(adapter) / 100;

        wait_loop = IXGBE_MAX_RX_DESC_POLL;
        wait_delay = delay_interval;

        while (wait_loop--) {
                usleep_range(wait_delay, wait_delay + 10);
                wait_delay += delay_interval * 2;
                rxdctl = 0;

                /* OR together the reading of all the active RXDCTL registers,
                 * and then test the result. We need the disable to complete
                 * before we start freeing the memory and invalidating the
                 * DMA mappings.
                 */
                for (i = 0; i < adapter->num_rx_queues; i++) {
                        struct ixgbe_ring *ring = adapter->rx_ring[i];
                        u8 reg_idx = ring->reg_idx;

                        rxdctl |= IXGBE_READ_REG(hw, IXGBE_RXDCTL(reg_idx));
                }

                if (!(rxdctl & IXGBE_RXDCTL_ENABLE))
                        return;
        }

        e_err(drv,
              "RXDCTL.ENABLE for one or more queues not cleared within the polling period\n");
}

void ixgbe_disable_tx(struct ixgbe_adapter *adapter)
{
        unsigned long wait_delay, delay_interval;
        struct ixgbe_hw *hw = &adapter->hw;
        int i, wait_loop;
        u32 txdctl;

        if (ixgbe_removed(hw->hw_addr))
                return;

        /* disable all enabled Tx queues */
        for (i = 0; i < adapter->num_tx_queues; i++) {
                struct ixgbe_ring *ring = adapter->tx_ring[i];
                u8 reg_idx = ring->reg_idx;

                IXGBE_WRITE_REG(hw, IXGBE_TXDCTL(reg_idx), IXGBE_TXDCTL_SWFLSH);
        }

        /* disable all enabled XDP Tx queues */
        for (i = 0; i < adapter->num_xdp_queues; i++) {
                struct ixgbe_ring *ring = adapter->xdp_ring[i];
                u8 reg_idx = ring->reg_idx;

                IXGBE_WRITE_REG(hw, IXGBE_TXDCTL(reg_idx), IXGBE_TXDCTL_SWFLSH);
        }

        /* If the link is not up there shouldn't be much in the way of
         * pending transactions. Those that are left will be flushed out
         * when the reset logic goes through the flush sequence to clean out
         * the pending Tx transactions.
         */
        if (!(IXGBE_READ_REG(hw, IXGBE_LINKS) & IXGBE_LINKS_UP))
                goto dma_engine_disable;

        /* Determine our minimum delay interval. We will increase this value
         * with each subsequent test. This way if the device returns quickly
         * we should spend as little time as possible waiting, however as
         * the time increases we will wait for larger periods of time.
         *
         * The trick here is that we increase the interval using the
         * following pattern: 1x 3x 5x 7x 9x 11x 13x 15x 17x 19x. The result
         * of that wait is that it totals up to 100x whatever interval we
         * choose. Since our minimum wait is 100us we can just divide the
         * total timeout by 100 to get our minimum delay interval.
         */
        delay_interval = ixgbe_get_completion_timeout(adapter) / 100;

        wait_loop = IXGBE_MAX_RX_DESC_POLL;
        wait_delay = delay_interval;

        while (wait_loop--) {
                usleep_range(wait_delay, wait_delay + 10);
                wait_delay += delay_interval * 2;
                txdctl = 0;

                /* OR together the reading of all the active TXDCTL registers,
                 * and then test the result. We need the disable to complete
                 * before we start freeing the memory and invalidating the
                 * DMA mappings.
                 */
                for (i = 0; i < adapter->num_tx_queues; i++) {
                        struct ixgbe_ring *ring = adapter->tx_ring[i];
                        u8 reg_idx = ring->reg_idx;

                        txdctl |= IXGBE_READ_REG(hw, IXGBE_TXDCTL(reg_idx));
                }
                for (i = 0; i < adapter->num_xdp_queues; i++) {
                        struct ixgbe_ring *ring = adapter->xdp_ring[i];
                        u8 reg_idx = ring->reg_idx;

                        txdctl |= IXGBE_READ_REG(hw, IXGBE_TXDCTL(reg_idx));
                }

                if (!(txdctl & IXGBE_TXDCTL_ENABLE))
                        goto dma_engine_disable;
        }

        e_err(drv,
              "TXDCTL.ENABLE for one or more queues not cleared within the polling period\n");

dma_engine_disable:
        /* Disable the Tx DMA engine on 82599 and later MAC */
        switch (hw->mac.type) {
        case ixgbe_mac_82599EB:
        case ixgbe_mac_X540:
        case ixgbe_mac_X550:
        case ixgbe_mac_X550EM_x:
        case ixgbe_mac_x550em_a:
                IXGBE_WRITE_REG(hw, IXGBE_DMATXCTL,
                                (IXGBE_READ_REG(hw, IXGBE_DMATXCTL) &
                                 ~IXGBE_DMATXCTL_TE));
                fallthrough;
        default:
                break;
        }
}

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

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

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

        err = hw->mac.ops.init_hw(hw);
        switch (err) {
        case 0:
        case IXGBE_ERR_SFP_NOT_PRESENT:
        case IXGBE_ERR_SFP_NOT_SUPPORTED:
                break;
        case IXGBE_ERR_MASTER_REQUESTS_PENDING:
                e_dev_err("master disable timed out\n");
                break;
        case IXGBE_ERR_EEPROM_VERSION:
                /* We are running on a pre-production device, log a warning */
                e_dev_warn("This device is a pre-production adapter/LOM. "
                           "Please be aware there may be issues associated with "
                           "your hardware.  If you are experiencing problems "
                           "please contact your Intel or hardware "
                           "representative who provided you with this "
                           "hardware.\n");
                break;
        default:
                e_dev_err("Hardware Error: %d\n", err);
        }

        clear_bit(__IXGBE_IN_SFP_INIT, &adapter->state);

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

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

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

        if (test_bit(__IXGBE_PTP_RUNNING, &adapter->state))
                ixgbe_ptp_reset(adapter);

        if (hw->phy.ops.set_phy_power) {
                if (!netif_running(adapter->netdev) && !adapter->wol)
                        hw->phy.ops.set_phy_power(hw, false);
                else
                        hw->phy.ops.set_phy_power(hw, true);
        }
}

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

        if (tx_ring->xsk_pool) {
                ixgbe_xsk_clean_tx_ring(tx_ring);
                goto out;
        }

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

                /* Free all the Tx ring sk_buffs */
                if (ring_is_xdp(tx_ring))
                        xdp_return_frame(tx_buffer->xdpf);
                else
                        dev_kfree_skb_any(tx_buffer->skb);

                /* unmap skb header data */
                dma_unmap_single(tx_ring->dev,
                                 dma_unmap_addr(tx_buffer, dma),
                                 dma_unmap_len(tx_buffer, len),
                                 DMA_TO_DEVICE);

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

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

                        /* unmap any remaining paged data */
                        if (dma_unmap_len(tx_buffer, len))
                                dma_unmap_page(tx_ring->dev,
                                               dma_unmap_addr(tx_buffer, dma),
                                               dma_unmap_len(tx_buffer, len),
                                               DMA_TO_DEVICE);
                }

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

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

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

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

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

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

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

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

        spin_lock(&adapter->fdir_perfect_lock);

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

        spin_unlock(&adapter->fdir_perfect_lock);
}

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

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

        /* Shut off incoming Tx traffic */
        netif_tx_stop_all_queues(netdev);

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

        /* Disable Rx */
        ixgbe_disable_rx(adapter);

        /* synchronize_rcu() needed for pending XDP buffers to drain */
        if (adapter->xdp_ring[0])
                synchronize_rcu();

        ixgbe_irq_disable(adapter);

        ixgbe_napi_disable_all(adapter);

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

        del_timer_sync(&adapter->service_timer);

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

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

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

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

        /* disable transmits in the hardware now that interrupts are off */
        ixgbe_disable_tx(adapter);

        if (!pci_channel_offline(adapter->pdev))
                ixgbe_reset(adapter);

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

        ixgbe_clean_all_tx_rings(adapter);
        ixgbe_clean_all_rx_rings(adapter);
}

/**
 * ixgbe_set_eee_capable - helper function to determine EEE support on X550
 * @adapter: board private structure
 */
static void ixgbe_set_eee_capable(struct ixgbe_adapter *adapter)
{
        struct ixgbe_hw *hw = &adapter->hw;

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

/**
 * ixgbe_tx_timeout - Respond to a Tx Hang
 * @netdev: network interface device structure
 * @txqueue: queue number that timed out
 **/
static void ixgbe_tx_timeout(struct net_device *netdev, unsigned int __always_unused txqueue)
{
        struct ixgbe_adapter *adapter = netdev_priv(netdev);

        /* Do the reset outside of interrupt context */
        ixgbe_tx_timeout_reset(adapter);
}

#ifdef CONFIG_IXGBE_DCB
static void ixgbe_init_dcb(struct ixgbe_adapter *adapter)
{
        struct ixgbe_hw *hw = &adapter->hw;
        struct tc_configuration *tc;
        int j;

        switch (hw->mac.type) {
        case ixgbe_mac_82598EB:
        case ixgbe_mac_82599EB:
                adapter->dcb_cfg.num_tcs.pg_tcs = MAX_TRAFFIC_CLASS;
                adapter->dcb_cfg.num_tcs.pfc_tcs = MAX_TRAFFIC_CLASS;
                break;
        case ixgbe_mac_X540:
        case ixgbe_mac_X550:
                adapter->dcb_cfg.num_tcs.pg_tcs = X540_TRAFFIC_CLASS;
                adapter->dcb_cfg.num_tcs.pfc_tcs = X540_TRAFFIC_CLASS;
                break;
        case ixgbe_mac_X550EM_x:
        case ixgbe_mac_x550em_a:
        default:
                adapter->dcb_cfg.num_tcs.pg_tcs = DEF_TRAFFIC_CLASS;
                adapter->dcb_cfg.num_tcs.pfc_tcs = DEF_TRAFFIC_CLASS;
                break;
        }

        /* Configure DCB traffic classes */
        for (j = 0; j < MAX_TRAFFIC_CLASS; j++) {
                tc = &adapter->dcb_cfg.tc_config[j];
                tc->path[DCB_TX_CONFIG].bwg_id = 0;
                tc->path[DCB_TX_CONFIG].bwg_percent = 12 + (j & 1);
                tc->path[DCB_RX_CONFIG].bwg_id = 0;
                tc->path[DCB_RX_CONFIG].bwg_percent = 12 + (j & 1);
                tc->dcb_pfc = pfc_disabled;
        }

        /* Initialize default user to priority mapping, UPx->TC0 */
        tc = &adapter->dcb_cfg.tc_config[0];
        tc->path[DCB_TX_CONFIG].up_to_tc_bitmap = 0xFF;
        tc->path[DCB_RX_CONFIG].up_to_tc_bitmap = 0xFF;

        adapter->dcb_cfg.bw_percentage[DCB_TX_CONFIG][0] = 100;
        adapter->dcb_cfg.bw_percentage[DCB_RX_CONFIG][0] = 100;
        adapter->dcb_cfg.pfc_mode_enable = false;
        adapter->dcb_set_bitmap = 0x00;
        if (adapter->flags & IXGBE_FLAG_DCB_CAPABLE)
                adapter->dcbx_cap = DCB_CAP_DCBX_HOST | DCB_CAP_DCBX_VER_CEE;
        memcpy(&adapter->temp_dcb_cfg, &adapter->dcb_cfg,
               sizeof(adapter->temp_dcb_cfg));
}
#endif

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

        /* PCI config space info */

        hw->vendor_id = pdev->vendor;
        hw->device_id = pdev->device;
        hw->revision_id = pdev->revision;
        hw->subsystem_vendor_id = pdev->subsystem_vendor;
        hw->subsystem_device_id = pdev->subsystem_device;

        /* get_invariants needs the device IDs */
        ii->get_invariants(hw);

        /* Set common capability flags and settings */
        rss = min_t(int, ixgbe_max_rss_indices(adapter), num_online_cpus());
        adapter->ring_feature[RING_F_RSS].limit = rss;
        adapter->flags2 |= IXGBE_FLAG2_RSC_CAPABLE;
        adapter->max_q_vectors = MAX_Q_VECTORS_82599;
        adapter->atr_sample_rate = 20;
        fdir = min_t(int, IXGBE_MAX_FDIR_INDICES, num_online_cpus());
        adapter->ring_feature[RING_F_FDIR].limit = fdir;
        adapter->fdir_pballoc = IXGBE_FDIR_PBALLOC_64K;
        adapter->ring_feature[RING_F_VMDQ].limit = 1;
#ifdef CONFIG_IXGBE_DCA
        adapter->flags |= IXGBE_FLAG_DCA_CAPABLE;
#endif
#ifdef CONFIG_IXGBE_DCB
        adapter->flags |= IXGBE_FLAG_DCB_CAPABLE;
        adapter->flags &= ~IXGBE_FLAG_DCB_ENABLED;
#endif
#ifdef IXGBE_FCOE
        adapter->flags |= IXGBE_FLAG_FCOE_CAPABLE;
        adapter->flags &= ~IXGBE_FLAG_FCOE_ENABLED;
#ifdef CONFIG_IXGBE_DCB
        /* Default traffic class to use for FCoE */
        adapter->fcoe.up = IXGBE_FCOE_DEFTC;
#endif /* CONFIG_IXGBE_DCB */
#endif /* IXGBE_FCOE */

        /* initialize static ixgbe jump table entries */
        adapter->jump_tables[0] = kzalloc(sizeof(*adapter->jump_tables[0]),
                                          GFP_KERNEL);
        if (!adapter->jump_tables[0])
                return -ENOMEM;
        adapter->jump_tables[0]->mat = ixgbe_ipv4_fields;

        for (i = 1; i < IXGBE_MAX_LINK_HANDLE; i++)
                adapter->jump_tables[i] = NULL;

        adapter->mac_table = kcalloc(hw->mac.num_rar_entries,
                                     sizeof(struct ixgbe_mac_addr),
                                     GFP_KERNEL);
        if (!adapter->mac_table)
                return -ENOMEM;

        if (ixgbe_init_rss_key(adapter))
                return -ENOMEM;

        adapter->af_xdp_zc_qps = bitmap_zalloc(MAX_XDP_QUEUES, GFP_KERNEL);
        if (!adapter->af_xdp_zc_qps)
                return -ENOMEM;

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

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

                adapter->max_q_vectors = MAX_Q_VECTORS_82598;
                adapter->ring_feature[RING_F_FDIR].limit = 0;
                adapter->atr_sample_rate = 0;
                adapter->fdir_pballoc = 0;
#ifdef IXGBE_FCOE
                adapter->flags &= ~IXGBE_FLAG_FCOE_CAPABLE;
                adapter->flags &= ~IXGBE_FLAG_FCOE_ENABLED;
#ifdef CONFIG_IXGBE_DCB
                adapter->fcoe.up = 0;
#endif /* IXGBE_DCB */
#endif /* IXGBE_FCOE */
                break;
        case ixgbe_mac_82599EB:
                if (hw->device_id == IXGBE_DEV_ID_82599_T3_LOM)
                        adapter->flags2 |= IXGBE_FLAG2_TEMP_SENSOR_CAPABLE;
                break;
        case ixgbe_mac_X540:
                fwsm = IXGBE_READ_REG(hw, IXGBE_FWSM(hw));
                if (fwsm & IXGBE_FWSM_TS_ENABLED)
                        adapter->flags2 |= IXGBE_FLAG2_TEMP_SENSOR_CAPABLE;
                break;
        case ixgbe_mac_x550em_a:
                switch (hw->device_id) {
                case IXGBE_DEV_ID_X550EM_A_1G_T:
                case IXGBE_DEV_ID_X550EM_A_1G_T_L:
                        adapter->flags2 |= IXGBE_FLAG2_TEMP_SENSOR_CAPABLE;
                        break;
                default:
                        break;
                }
                fallthrough;
        case ixgbe_mac_X550EM_x:
#ifdef CONFIG_IXGBE_DCB
                adapter->flags &= ~IXGBE_FLAG_DCB_CAPABLE;
#endif
#ifdef IXGBE_FCOE
                adapter->flags &= ~IXGBE_FLAG_FCOE_CAPABLE;
#ifdef CONFIG_IXGBE_DCB
                adapter->fcoe.up = 0;
#endif /* IXGBE_DCB */
#endif /* IXGBE_FCOE */
                fallthrough;
        case ixgbe_mac_X550:
                if (hw->mac.type == ixgbe_mac_X550)
                        adapter->flags2 |= IXGBE_FLAG2_TEMP_SENSOR_CAPABLE;
#ifdef CONFIG_IXGBE_DCA
                adapter->flags &= ~IXGBE_FLAG_DCA_CAPABLE;
#endif
                break;
        default:
                break;
        }

#ifdef IXGBE_FCOE
        /* FCoE support exists, always init the FCoE lock */
        spin_lock_init(&adapter->fcoe.lock);

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

#ifdef CONFIG_IXGBE_DCB
        ixgbe_init_dcb(adapter);
#endif
        ixgbe_init_ipsec_offload(adapter);

        /* default flow control settings */
        hw->fc.requested_mode = ixgbe_fc_full;
        hw->fc.current_mode = ixgbe_fc_full;    /* init for ethtool output */
        ixgbe_pbthresh_setup(adapter);
        hw->fc.pause_time = IXGBE_DEFAULT_FCPAUSE;
        hw->fc.send_xon = true;
        hw->fc.disable_fc_autoneg = ixgbe_device_supports_autoneg_fc(hw);

#ifdef CONFIG_PCI_IOV
        if (max_vfs > 0)
                e_dev_warn("Enabling SR-IOV VFs using the max_vfs module parameter is deprecated - please use the pci sysfs interface instead.\n");

        /* assign number of SR-IOV VFs */
        if (hw->mac.type != ixgbe_mac_82598EB) {
                if (max_vfs > IXGBE_MAX_VFS_DRV_LIMIT) {
                        max_vfs = 0;
                        e_dev_warn("max_vfs parameter out of range. Not assigning any SR-IOV VFs\n");
                }
        }
#endif /* CONFIG_PCI_IOV */

        /* enable itr by default in dynamic mode */
        adapter->rx_itr_setting = 1;
        adapter->tx_itr_setting = 1;

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

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

        /* initialize eeprom parameters */
        if (ixgbe_init_eeprom_params_generic(hw)) {
                e_dev_err("EEPROM initialization failed\n");
                return -EIO;
        }

        /* PF holds first pool slot */
        set_bit(0, adapter->fwd_bitmask);
        set_bit(__IXGBE_DOWN, &adapter->state);

        return 0;
}

/**
 * ixgbe_setup_tx_resources - allocate Tx resources (Descriptors)
 * @tx_ring:    tx descriptor ring (for a specific queue) to setup
 *
 * Return 0 on success, negative on failure
 **/
int ixgbe_setup_tx_resources(struct ixgbe_ring *tx_ring)
{
        struct device *dev = tx_ring->dev;
        int orig_node = dev_to_node(dev);
        int ring_node = NUMA_NO_NODE;
        int size;

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

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

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

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

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

        tx_ring->next_to_use = 0;
        tx_ring->next_to_clean = 0;
        return 0;

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

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

        for (i = 0; i < adapter->num_tx_queues; i++) {
                err = ixgbe_setup_tx_resources(adapter->tx_ring[i]);
                if (!err)
                        continue;

                e_err(probe, "Allocation for Tx Queue %u failed\n", i);
                goto err_setup_tx;
        }
        for (j = 0; j < adapter->num_xdp_queues; j++) {
                err = ixgbe_setup_tx_resources(adapter->xdp_ring[j]);
                if (!err)
                        continue;

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

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

static int ixgbe_rx_napi_id(struct ixgbe_ring *rx_ring)
{
        struct ixgbe_q_vector *q_vector = rx_ring->q_vector;

        return q_vector ? q_vector->napi.napi_id : 0;
}

/**
 * ixgbe_setup_rx_resources - allocate Rx resources (Descriptors)
 * @adapter: pointer to ixgbe_adapter
 * @rx_ring:    rx descriptor ring (for a specific queue) to setup
 *
 * Returns 0 on success, negative on failure
 **/
int ixgbe_setup_rx_resources(struct ixgbe_adapter *adapter,
                             struct ixgbe_ring *rx_ring)
{
        struct device *dev = rx_ring->dev;
        int orig_node = dev_to_node(dev);
        int ring_node = NUMA_NO_NODE;
        int size;

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

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

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

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

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

        rx_ring->next_to_clean = 0;
        rx_ring->next_to_use = 0;

        /* XDP RX-queue info */
        if (xdp_rxq_info_reg(&rx_ring->xdp_rxq, adapter->netdev,
                             rx_ring->queue_index, ixgbe_rx_napi_id(rx_ring)) < 0)
                goto err;

        rx_ring->xdp_prog = adapter->xdp_prog;

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

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

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

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

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

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

        vfree(tx_ring->tx_buffer_info);
        tx_ring->tx_buffer_info = NULL;

        /* if not set, then don't free */
        if (!tx_ring->desc)
                return;

        dma_free_coherent(tx_ring->dev, tx_ring->size,
                          tx_ring->desc, tx_ring->dma);

        tx_ring->desc = NULL;
}

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

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

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

        rx_ring->xdp_prog = NULL;
        xdp_rxq_info_unreg(&rx_ring->xdp_rxq);
        vfree(rx_ring->rx_buffer_info);
        rx_ring->rx_buffer_info = NULL;

        /* if not set, then don't free */
        if (!rx_ring->desc)
                return;

        dma_free_coherent(rx_ring->dev, rx_ring->size,
                          rx_ring->desc, rx_ring->dma);

        rx_ring->desc = NULL;
}

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

#ifdef IXGBE_FCOE
        ixgbe_free_fcoe_ddp_resources(adapter);

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

/**
 * ixgbe_change_mtu - Change the Maximum Transfer Unit
 * @netdev: network interface device structure
 * @new_mtu: new value for maximum frame size
 *
 * Returns 0 on success, negative on failure
 **/
static int ixgbe_change_mtu(struct net_device *netdev, int new_mtu)
{
        struct ixgbe_adapter *adapter = netdev_priv(netdev);

        if (adapter->xdp_prog) {
                int new_frame_size = new_mtu + ETH_HLEN + ETH_FCS_LEN +
                                     VLAN_HLEN;
                int i;

                for (i = 0; i < adapter->num_rx_queues; i++) {
                        struct ixgbe_ring *ring = adapter->rx_ring[i];

                        if (new_frame_size > ixgbe_rx_bufsz(ring)) {
                                e_warn(probe, "Requested MTU size is not supported with XDP\n");
                                return -EINVAL;
                        }
                }
        }

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

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

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

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

        return 0;
}

/**
 * ixgbe_open - Called when a network interface is made active
 * @netdev: network interface device structure
 *
 * Returns 0 on success, negative value on failure
 *
 * The open entry point is called when a network interface is made
 * active by the system (IFF_UP).  At this point all resources needed
 * for transmit and receive operations are allocated, the interrupt
 * handler is registered with the OS, the watchdog timer is started,
 * and the stack is notified that the interface is ready.
 **/
int ixgbe_open(struct net_device *netdev)
{
        struct ixgbe_adapter *adapter = netdev_priv(netdev);
        struct ixgbe_hw *hw = &adapter->hw;
        int err, queues;

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

        netif_carrier_off(netdev);

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

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

        ixgbe_configure(adapter);

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

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

        queues = adapter->num_rx_queues;
        err = netif_set_real_num_rx_queues(netdev, queues);
        if (err)
                goto err_set_queues;

        ixgbe_ptp_init(adapter);

        ixgbe_up_complete(adapter);

        udp_tunnel_nic_reset_ntf(netdev);

        return 0;

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

        return err;
}

static void ixgbe_close_suspend(struct ixgbe_adapter *adapter)
{
        ixgbe_ptp_suspend(adapter);

        if (adapter->hw.phy.ops.enter_lplu) {
                adapter->hw.phy.reset_disable = true;
                ixgbe_down(adapter);
                adapter->hw.phy.ops.enter_lplu(&adapter->hw);
                adapter->hw.phy.reset_disable = false;
        } else {
                ixgbe_down(adapter);
        }

        ixgbe_free_irq(adapter);

        ixgbe_free_all_tx_resources(adapter);
        ixgbe_free_all_rx_resources(adapter);
}

/**
 * ixgbe_close - Disables a network interface
 * @netdev: network interface device structure
 *
 * Returns 0, this is not allowed to fail
 *
 * The close entry point is called when an interface is de-activated
 * by the OS.  The hardware is still under the drivers control, but
 * needs to be disabled.  A global MAC reset is issued to stop the
 * hardware, and all transmit and receive resources are freed.
 **/
int ixgbe_close(struct net_device *netdev)
{
        struct ixgbe_adapter *adapter = netdev_priv(netdev);

        ixgbe_ptp_stop(adapter);

        if (netif_device_present(netdev))
                ixgbe_close_suspend(adapter);

        ixgbe_fdir_filter_exit(adapter);

        ixgbe_release_hw_control(adapter);

        return 0;
}

static int __maybe_unused ixgbe_resume(struct device *dev_d)
{
        struct pci_dev *pdev = to_pci_dev(dev_d);
        struct ixgbe_adapter *adapter = pci_get_drvdata(pdev);
        struct net_device *netdev = adapter->netdev;
        u32 err;

        adapter->hw.hw_addr = adapter->io_addr;

        err = pci_enable_device_mem(pdev);
        if (err) {
                e_dev_err("Cannot enable PCI device from suspend\n");
                return err;
        }
        smp_mb__before_atomic();
        clear_bit(__IXGBE_DISABLED, &adapter->state);
        pci_set_master(pdev);

        device_wakeup_disable(dev_d);

        ixgbe_reset(adapter);

        IXGBE_WRITE_REG(&adapter->hw, IXGBE_WUS, ~0);

        rtnl_lock();
        err = ixgbe_init_interrupt_scheme(adapter);
        if (!err && netif_running(netdev))
                err = ixgbe_open(netdev);


        if (!err)
                netif_device_attach(netdev);
        rtnl_unlock();

        return err;
}

static int __ixgbe_shutdown(struct pci_dev *pdev, bool *enable_wake)
{
        struct ixgbe_adapter *adapter = pci_get_drvdata(pdev);
        struct net_device *netdev = adapter->netdev;
        struct ixgbe_hw *hw = &adapter->hw;
        u32 ctrl;
        u32 wufc = adapter->wol;

        rtnl_lock();
        netif_device_detach(netdev);

        if (netif_running(netdev))
                ixgbe_close_suspend(adapter);

        ixgbe_clear_interrupt_scheme(adapter);
        rtnl_unlock();

        if (hw->mac.ops.stop_link_on_d3)
                hw->mac.ops.stop_link_on_d3(hw);

        if (wufc) {
                u32 fctrl;

                ixgbe_set_rx_mode(netdev);

                /* enable the optics for 82599 SFP+ fiber as we can WoL */
                if (hw->mac.ops.enable_tx_laser)
                        hw->mac.ops.enable_tx_laser(hw);

                /* enable the reception of multicast packets */
                fctrl = IXGBE_READ_REG(hw, IXGBE_FCTRL);
                fctrl |= IXGBE_FCTRL_MPE;
                IXGBE_WRITE_REG(hw, IXGBE_FCTRL, fctrl);

                ctrl = IXGBE_READ_REG(hw, IXGBE_CTRL);
                ctrl |= IXGBE_CTRL_GIO_DIS;
                IXGBE_WRITE_REG(hw, IXGBE_CTRL, ctrl);

                IXGBE_WRITE_REG(hw, IXGBE_WUFC, wufc);
        } else {
                IXGBE_WRITE_REG(hw, IXGBE_WUC, 0);
                IXGBE_WRITE_REG(hw, IXGBE_WUFC, 0);
        }

        switch (hw->mac.type) {
        case ixgbe_mac_82598EB:
                pci_wake_from_d3(pdev, false);
                break;
        case ixgbe_mac_82599EB:
        case ixgbe_mac_X540:
        case ixgbe_mac_X550:
        case ixgbe_mac_X550EM_x:
        case ixgbe_mac_x550em_a:
                pci_wake_from_d3(pdev, !!wufc);
                break;
        default:
                break;
        }

        *enable_wake = !!wufc;
        if (hw->phy.ops.set_phy_power && !*enable_wake)
                hw->phy.ops.set_phy_power(hw, false);

        ixgbe_release_hw_control(adapter);

        if (!test_and_set_bit(__IXGBE_DISABLED, &adapter->state))
                pci_disable_device(pdev);

        return 0;
}

static int __maybe_unused ixgbe_suspend(struct device *dev_d)
{
        struct pci_dev *pdev = to_pci_dev(dev_d);
        int retval;
        bool wake;

        retval = __ixgbe_shutdown(pdev, &wake);

        device_set_wakeup_enable(dev_d, wake);

        return retval;
}

static void ixgbe_shutdown(struct pci_dev *pdev)
{
        bool wake;

        __ixgbe_shutdown(pdev, &wake);

        if (system_state == SYSTEM_POWER_OFF) {
                pci_wake_from_d3(pdev, wake);
                pci_set_power_state(pdev, PCI_D3hot);
        }
}

/**
 * ixgbe_update_stats - Update the board statistics counters.
 * @adapter: board private structure
 **/
void ixgbe_update_stats(struct ixgbe_adapter *adapter)
{
        struct net_device *netdev = adapter->netdev;
        struct ixgbe_hw *hw = &adapter->hw;
        struct ixgbe_hw_stats *hwstats = &adapter->stats;
        u64 total_mpc = 0;
        u32 i, missed_rx = 0, mpc, bprc, lxon, lxoff, xon_off_tot;
        u64 non_eop_descs = 0, restart_queue = 0, tx_busy = 0;
        u64 alloc_rx_page_failed = 0, alloc_rx_buff_failed = 0;
        u64 alloc_rx_page = 0;
        u64 bytes = 0, packets = 0, hw_csum_rx_error = 0;

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

        if (adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED) {
                u64 rsc_count = 0;
                u64 rsc_flush = 0;
                for (i = 0; i < adapter->num_rx_queues; i++) {
                        rsc_count += adapter->rx_ring[i]->rx_stats.rsc_count;
                        rsc_flush += adapter->rx_ring[i]->rx_stats.rsc_flush;
                }
                adapter->rsc_total_count = rsc_count;
                adapter->rsc_total_flush = rsc_flush;
        }

        for (i = 0; i < adapter->num_rx_queues; i++) {
                struct ixgbe_ring *rx_ring = READ_ONCE(adapter->rx_ring[i]);

                if (!rx_ring)
                        continue;
                non_eop_descs += rx_ring->rx_stats.non_eop_descs;
                alloc_rx_page += rx_ring->rx_stats.alloc_rx_page;
                alloc_rx_page_failed += rx_ring->rx_stats.alloc_rx_page_failed;
                alloc_rx_buff_failed += rx_ring->rx_stats.alloc_rx_buff_failed;
                hw_csum_rx_error += rx_ring->rx_stats.csum_err;
                bytes += rx_ring->stats.bytes;
                packets += rx_ring->stats.packets;
        }
        adapter->non_eop_descs = non_eop_descs;
        adapter->alloc_rx_page = alloc_rx_page;
        adapter->alloc_rx_page_failed = alloc_rx_page_failed;
        adapter->alloc_rx_buff_failed = alloc_rx_buff_failed;
        adapter->hw_csum_rx_error = hw_csum_rx_error;
        netdev->stats.rx_bytes = bytes;
        netdev->stats.rx_packets = packets;

        bytes = 0;
        packets = 0;
        /* gather some stats to the adapter struct that are per queue */
        for (i = 0; i < adapter->num_tx_queues; i++) {
                struct ixgbe_ring *tx_ring = READ_ONCE(adapter->tx_ring[i]);

                if (!tx_ring)
                        continue;
                restart_queue += tx_ring->tx_stats.restart_queue;
                tx_busy += tx_ring->tx_stats.tx_busy;
                bytes += tx_ring->stats.bytes;
                packets += tx_ring->stats.packets;
        }
        for (i = 0; i < adapter->num_xdp_queues; i++) {
                struct ixgbe_ring *xdp_ring = READ_ONCE(adapter->xdp_ring[i]);

                if (!xdp_ring)
                        continue;
                restart_queue += xdp_ring->tx_stats.restart_queue;
                tx_busy += xdp_ring->tx_stats.tx_busy;
                bytes += xdp_ring->stats.bytes;
                packets += xdp_ring->stats.packets;
        }
        adapter->restart_queue = restart_queue;
        adapter->tx_busy = tx_busy;
        netdev->stats.tx_bytes = bytes;
        netdev->stats.tx_packets = packets;

        hwstats->crcerrs += IXGBE_READ_REG(hw, IXGBE_CRCERRS);

        /* 8 register reads */
        for (i = 0; i < 8; i++) {
                /* for packet buffers not used, the register should read 0 */
                mpc = IXGBE_READ_REG(hw, IXGBE_MPC(i));
                missed_rx += mpc;
                hwstats->mpc[i] += mpc;
                total_mpc += hwstats->mpc[i];
                hwstats->pxontxc[i] += IXGBE_READ_REG(hw, IXGBE_PXONTXC(i));
                hwstats->pxofftxc[i] += IXGBE_READ_REG(hw, IXGBE_PXOFFTXC(i));
                switch (hw->mac.type) {
                case ixgbe_mac_82598EB:
                        hwstats->rnbc[i] += IXGBE_READ_REG(hw, IXGBE_RNBC(i));
                        hwstats->qbtc[i] += IXGBE_READ_REG(hw, IXGBE_QBTC(i));
                        hwstats->qbrc[i] += IXGBE_READ_REG(hw, IXGBE_QBRC(i));
                        hwstats->pxonrxc[i] +=
                                IXGBE_READ_REG(hw, IXGBE_PXONRXC(i));
                        break;
                case ixgbe_mac_82599EB:
                case ixgbe_mac_X540:
                case ixgbe_mac_X550:
                case ixgbe_mac_X550EM_x:
                case ixgbe_mac_x550em_a:
                        hwstats->pxonrxc[i] +=
                                IXGBE_READ_REG(hw, IXGBE_PXONRXCNT(i));
                        break;
                default:
                        break;
                }
        }

        /*16 register reads */
        for (i = 0; i < 16; i++) {
                hwstats->qptc[i] += IXGBE_READ_REG(hw, IXGBE_QPTC(i));
                hwstats->qprc[i] += IXGBE_READ_REG(hw, IXGBE_QPRC(i));
                if ((hw->mac.type == ixgbe_mac_82599EB) ||
                    (hw->mac.type == ixgbe_mac_X540) ||
                    (hw->mac.type == ixgbe_mac_X550) ||
                    (hw->mac.type == ixgbe_mac_X550EM_x) ||
                    (hw->mac.type == ixgbe_mac_x550em_a)) {
                        hwstats->qbtc[i] += IXGBE_READ_REG(hw, IXGBE_QBTC_L(i));
                        IXGBE_READ_REG(hw, IXGBE_QBTC_H(i)); /* to clear */
                        hwstats->qbrc[i] += IXGBE_READ_REG(hw, IXGBE_QBRC_L(i));
                        IXGBE_READ_REG(hw, IXGBE_QBRC_H(i)); /* to clear */
                }
        }

        hwstats->gprc += IXGBE_READ_REG(hw, IXGBE_GPRC);
        /* work around hardware counting issue */
        hwstats->gprc -= missed_rx;

        ixgbe_update_xoff_received(adapter);

        /* 82598 hardware only has a 32 bit counter in the high register */
        switch (hw->mac.type) {
        case ixgbe_mac_82598EB:
                hwstats->lxonrxc += IXGBE_READ_REG(hw, IXGBE_LXONRXC);
                hwstats->gorc += IXGBE_READ_REG(hw, IXGBE_GORCH);
                hwstats->gotc += IXGBE_READ_REG(hw, IXGBE_GOTCH);
                hwstats->tor += IXGBE_READ_REG(hw, IXGBE_TORH);
                break;
        case ixgbe_mac_X540:
        case ixgbe_mac_X550:
        case ixgbe_mac_X550EM_x:
        case ixgbe_mac_x550em_a:
                /* OS2BMC stats are X540 and later */
                hwstats->o2bgptc += IXGBE_READ_REG(hw, IXGBE_O2BGPTC);
                hwstats->o2bspc += IXGBE_READ_REG(hw, IXGBE_O2BSPC);
                hwstats->b2ospc += IXGBE_READ_REG(hw, IXGBE_B2OSPC);
                hwstats->b2ogprc += IXGBE_READ_REG(hw, IXGBE_B2OGPRC);
                fallthrough;
        case ixgbe_mac_82599EB:
                for (i = 0; i < 16; i++)
                        adapter->hw_rx_no_dma_resources +=
                                             IXGBE_READ_REG(hw, IXGBE_QPRDC(i));
                hwstats->gorc += IXGBE_READ_REG(hw, IXGBE_GORCL);
                IXGBE_READ_REG(hw, IXGBE_GORCH); /* to clear */
                hwstats->gotc += IXGBE_READ_REG(hw, IXGBE_GOTCL);
                IXGBE_READ_REG(hw, IXGBE_GOTCH); /* to clear */
                hwstats->tor += IXGBE_READ_REG(hw, IXGBE_TORL);
                IXGBE_READ_REG(hw, IXGBE_TORH); /* to clear */
                hwstats->lxonrxc += IXGBE_READ_REG(hw, IXGBE_LXONRXCNT);
                hwstats->fdirmatch += IXGBE_READ_REG(hw, IXGBE_FDIRMATCH);
                hwstats->fdirmiss += IXGBE_READ_REG(hw, IXGBE_FDIRMISS);
#ifdef IXGBE_FCOE
                hwstats->fccrc += IXGBE_READ_REG(hw, IXGBE_FCCRC);
                hwstats->fcoerpdc += IXGBE_READ_REG(hw, IXGBE_FCOERPDC);
                hwstats->fcoeprc += IXGBE_READ_REG(hw, IXGBE_FCOEPRC);
                hwstats->fcoeptc += IXGBE_READ_REG(hw, IXGBE_FCOEPTC);
                hwstats->fcoedwrc += IXGBE_READ_REG(hw, IXGBE_FCOEDWRC);
                hwstats->fcoedwtc += IXGBE_READ_REG(hw, IXGBE_FCOEDWTC);
                /* Add up per cpu counters for total ddp aloc fail */
                if (adapter->fcoe.ddp_pool) {
                        struct ixgbe_fcoe *fcoe = &adapter->fcoe;
                        struct ixgbe_fcoe_ddp_pool *ddp_pool;
                        unsigned int cpu;
                        u64 noddp = 0, noddp_ext_buff = 0;
                        for_each_possible_cpu(cpu) {
                                ddp_pool = per_cpu_ptr(fcoe->ddp_pool, cpu);
                                noddp += ddp_pool->noddp;
                                noddp_ext_buff += ddp_pool->noddp_ext_buff;
                        }
                        hwstats->fcoe_noddp = noddp;
                        hwstats->fcoe_noddp_ext_buff = noddp_ext_buff;
                }
#endif /* IXGBE_FCOE */
                break;
        default:
                break;
        }
        bprc = IXGBE_READ_REG(hw, IXGBE_BPRC);
        hwstats->bprc += bprc;
        hwstats->mprc += IXGBE_READ_REG(hw, IXGBE_MPRC);
        if (hw->mac.type == ixgbe_mac_82598EB)
                hwstats->mprc -= bprc;
        hwstats->roc += IXGBE_READ_REG(hw, IXGBE_ROC);
        hwstats->prc64 += IXGBE_READ_REG(hw, IXGBE_PRC64);
        hwstats->prc127 += IXGBE_READ_REG(hw, IXGBE_PRC127);
        hwstats->prc255 += IXGBE_READ_REG(hw, IXGBE_PRC255);
        hwstats->prc511 += IXGBE_READ_REG(hw, IXGBE_PRC511);
        hwstats->prc1023 += IXGBE_READ_REG(hw, IXGBE_PRC1023);
        hwstats->prc1522 += IXGBE_READ_REG(hw, IXGBE_PRC1522);
        hwstats->rlec += IXGBE_READ_REG(hw, IXGBE_RLEC);
        lxon = IXGBE_READ_REG(hw, IXGBE_LXONTXC);
        hwstats->lxontxc += lxon;
        lxoff = IXGBE_READ_REG(hw, IXGBE_LXOFFTXC);
        hwstats->lxofftxc += lxoff;
        hwstats->gptc += IXGBE_READ_REG(hw, IXGBE_GPTC);
        hwstats->mptc += IXGBE_READ_REG(hw, IXGBE_MPTC);
        /*
         * 82598 errata - tx of flow control packets is included in tx counters
         */
        xon_off_tot = lxon + lxoff;
        hwstats->gptc -= xon_off_tot;
        hwstats->mptc -= xon_off_tot;
        hwstats->gotc -= (xon_off_tot * (ETH_ZLEN + ETH_FCS_LEN));
        hwstats->ruc += IXGBE_READ_REG(hw, IXGBE_RUC);
        hwstats->rfc += IXGBE_READ_REG(hw, IXGBE_RFC);
        hwstats->rjc += IXGBE_READ_REG(hw, IXGBE_RJC);
        hwstats->tpr += IXGBE_READ_REG(hw, IXGBE_TPR);
        hwstats->ptc64 += IXGBE_READ_REG(hw, IXGBE_PTC64);
        hwstats->ptc64 -= xon_off_tot;
        hwstats->ptc127 += IXGBE_READ_REG(hw, IXGBE_PTC127);
        hwstats->ptc255 += IXGBE_READ_REG(hw, IXGBE_PTC255);
        hwstats->ptc511 += IXGBE_READ_REG(hw, IXGBE_PTC511);
        hwstats->ptc1023 += IXGBE_READ_REG(hw, IXGBE_PTC1023);
        hwstats->ptc1522 += IXGBE_READ_REG(hw, IXGBE_PTC1522);
        hwstats->bptc += IXGBE_READ_REG(hw, IXGBE_BPTC);

        /* Fill out the OS statistics structure */
        netdev->stats.multicast = hwstats->mprc;

        /* Rx Errors */
        netdev->stats.rx_errors = hwstats->crcerrs + hwstats->rlec;
        netdev->stats.rx_dropped = 0;
        netdev->stats.rx_length_errors = hwstats->rlec;
        netdev->stats.rx_crc_errors = hwstats->crcerrs;
        netdev->stats.rx_missed_errors = total_mpc;
}

/**
 * ixgbe_fdir_reinit_subtask - worker thread to reinit FDIR filter table
 * @adapter: pointer to the device adapter structure
 **/
static void ixgbe_fdir_reinit_subtask(struct ixgbe_adapter *adapter)
{
        struct ixgbe_hw *hw = &adapter->hw;
        int i;

        if (!(adapter->flags2 & IXGBE_FLAG2_FDIR_REQUIRES_REINIT))
                return;

        adapter->flags2 &= ~IXGBE_FLAG2_FDIR_REQUIRES_REINIT;

        /* if interface is down do nothing */
        if (test_bit(__IXGBE_DOWN, &adapter->state))
                return;

        /* do nothing if we are not using signature filters */
        if (!(adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE))
                return;

        adapter->fdir_overflow++;

        if (ixgbe_reinit_fdir_tables_82599(hw) == 0) {
                for (i = 0; i < adapter->num_tx_queues; i++)
                        set_bit(__IXGBE_TX_FDIR_INIT_DONE,
                                &(adapter->tx_ring[i]->state));
                for (i = 0; i < adapter->num_xdp_queues; i++)
                        set_bit(__IXGBE_TX_FDIR_INIT_DONE,
                                &adapter->xdp_ring[i]->state);
                /* re-enable flow director interrupts */
                IXGBE_WRITE_REG(hw, IXGBE_EIMS, IXGBE_EIMS_FLOW_DIR);
        } else {
                e_err(probe, "failed to finish FDIR re-initialization, "
                      "ignored adding FDIR ATR filters\n");
        }
}

/**
 * ixgbe_check_hang_subtask - check for hung queues and dropped interrupts
 * @adapter: pointer to the device adapter structure
 *
 * This function serves two purposes.  First it strobes the interrupt lines
 * in order to make certain interrupts are occurring.  Secondly it sets the
 * bits needed to check for TX hangs.  As a result we should immediately
 * determine if a hang has occurred.
 */
static void ixgbe_check_hang_subtask(struct ixgbe_adapter *adapter)
{
        struct ixgbe_hw *hw = &adapter->hw;
        u64 eics = 0;
        int i;

        /* If we're down, removing or resetting, just bail */
        if (test_bit(__IXGBE_DOWN, &adapter->state) ||
            test_bit(__IXGBE_REMOVING, &adapter->state) ||
            test_bit(__IXGBE_RESETTING, &adapter->state))
                return;

        /* Force detection of hung controller */
        if (netif_carrier_ok(adapter->netdev)) {
                for (i = 0; i < adapter->num_tx_queues; i++)
                        set_check_for_tx_hang(adapter->tx_ring[i]);
                for (i = 0; i < adapter->num_xdp_queues; i++)
                        set_check_for_tx_hang(adapter->xdp_ring[i]);
        }

        if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED)) {
                /*
                 * for legacy and MSI interrupts don't set any bits
                 * that are enabled for EIAM, because this operation
                 * would set *both* EIMS and EICS for any bit in EIAM
                 */
                IXGBE_WRITE_REG(hw, IXGBE_EICS,
                        (IXGBE_EICS_TCP_TIMER | IXGBE_EICS_OTHER));
        } else {
                /* get one bit for every active tx/rx interrupt vector */
                for (i = 0; i < adapter->num_q_vectors; i++) {
                        struct ixgbe_q_vector *qv = adapter->q_vector[i];
                        if (qv->rx.ring || qv->tx.ring)
                                eics |= BIT_ULL(i);
                }
        }

        /* Cause software interrupt to ensure rings are cleaned */
        ixgbe_irq_rearm_queues(adapter, eics);
}

/**
 * ixgbe_watchdog_update_link - update the link status
 * @adapter: pointer to the device adapter structure
 **/
static void ixgbe_watchdog_update_link(struct ixgbe_adapter *adapter)
{
        struct ixgbe_hw *hw = &adapter->hw;
        u32 link_speed = adapter->link_speed;
        bool link_up = adapter->link_up;
        bool pfc_en = adapter->dcb_cfg.pfc_mode_enable;

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

        if (hw->mac.ops.check_link) {
                hw->mac.ops.check_link(hw, &link_speed, &link_up, false);
        } else {
                /* always assume link is up, if no check link function */
                link_speed = IXGBE_LINK_SPEED_10GB_FULL;
                link_up = true;
        }

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

        if (link_up && !((adapter->flags & IXGBE_FLAG_DCB_ENABLED) && pfc_en)) {
                hw->mac.ops.fc_enable(hw);
                ixgbe_set_rx_drop_en(adapter);
        }

        if (link_up ||
            time_after(jiffies, (adapter->link_check_timeout +
                                 IXGBE_TRY_LINK_TIMEOUT))) {
                adapter->flags &= ~IXGBE_FLAG_NEED_LINK_UPDATE;
                IXGBE_WRITE_REG(hw, IXGBE_EIMS, IXGBE_EIMC_LSC);
                IXGBE_WRITE_FLUSH(hw);
        }

        adapter->link_up = link_up;
        adapter->link_speed = link_speed;
}

static void ixgbe_update_default_up(struct ixgbe_adapter *adapter)
{
#ifdef CONFIG_IXGBE_DCB
        struct net_device *netdev = adapter->netdev;
        struct dcb_app app = {
                              .selector = IEEE_8021QAZ_APP_SEL_ETHERTYPE,
                              .protocol = 0,
                             };
        u8 up = 0;

        if (adapter->dcbx_cap & DCB_CAP_DCBX_VER_IEEE)
                up = dcb_ieee_getapp_mask(netdev, &app);

        adapter->default_up = (up > 1) ? (ffs(up) - 1) : 0;
#endif
}

/**
 * ixgbe_watchdog_link_is_up - update netif_carrier status and
 *                             print link up message
 * @adapter: pointer to the device adapter structure
 **/
static void ixgbe_watchdog_link_is_up(struct ixgbe_adapter *adapter)
{
        struct net_device *netdev = adapter->netdev;
        struct ixgbe_hw *hw = &adapter->hw;
        u32 link_speed = adapter->link_speed;
        const char *speed_str;
        bool flow_rx, flow_tx;

        /* only continue if link was previously down */
        if (netif_carrier_ok(netdev))
                return;

        adapter->flags2 &= ~IXGBE_FLAG2_SEARCH_FOR_SFP;

        switch (hw->mac.type) {
        case ixgbe_mac_82598EB: {
                u32 frctl = IXGBE_READ_REG(hw, IXGBE_FCTRL);
                u32 rmcs = IXGBE_READ_REG(hw, IXGBE_RMCS);
                flow_rx = !!(frctl & IXGBE_FCTRL_RFCE);
                flow_tx = !!(rmcs & IXGBE_RMCS_TFCE_802_3X);
        }
                break;
        case ixgbe_mac_X540:
        case ixgbe_mac_X550:
        case ixgbe_mac_X550EM_x:
        case ixgbe_mac_x550em_a:
        case ixgbe_mac_82599EB: {
                u32 mflcn = IXGBE_READ_REG(hw, IXGBE_MFLCN);
                u32 fccfg = IXGBE_READ_REG(hw, IXGBE_FCCFG);
                flow_rx = !!(mflcn & IXGBE_MFLCN_RFCE);
                flow_tx = !!(fccfg & IXGBE_FCCFG_TFCE_802_3X);
        }
                break;
        default:
                flow_tx = false;
                flow_rx = false;
                break;
        }

        adapter->last_rx_ptp_check = jiffies;

        if (test_bit(__IXGBE_PTP_RUNNING, &adapter->state))
                ixgbe_ptp_start_cyclecounter(adapter);

        switch (link_speed) {
        case IXGBE_LINK_SPEED_10GB_FULL:
                speed_str = "10 Gbps";
                break;
        case IXGBE_LINK_SPEED_5GB_FULL:
                speed_str = "5 Gbps";
                break;
        case IXGBE_LINK_SPEED_2_5GB_FULL:
                speed_str = "2.5 Gbps";
                break;
        case IXGBE_LINK_SPEED_1GB_FULL:
                speed_str = "1 Gbps";
                break;
        case IXGBE_LINK_SPEED_100_FULL:
                speed_str = "100 Mbps";
                break;
        case IXGBE_LINK_SPEED_10_FULL:
                speed_str = "10 Mbps";
                break;
        default:
                speed_str = "unknown speed";
                break;
        }
        e_info(drv, "NIC Link is Up %s, Flow Control: %s\n", speed_str,
               ((flow_rx && flow_tx) ? "RX/TX" :
               (flow_rx ? "RX" :
               (flow_tx ? "TX" : "None"))));

        netif_carrier_on(netdev);
        ixgbe_check_vf_rate_limit(adapter);

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

        /* update the default user priority for VFs */
        ixgbe_update_default_up(adapter);

        /* ping all the active vfs to let them know link has changed */
        ixgbe_ping_all_vfs(adapter);
}

/**
 * ixgbe_watchdog_link_is_down - update netif_carrier status and
 *                               print link down message
 * @adapter: pointer to the adapter structure
 **/
static void ixgbe_watchdog_link_is_down(struct ixgbe_adapter *adapter)
{
        struct net_device *netdev = adapter->netdev;
        struct ixgbe_hw *hw = &adapter->hw;

        adapter->link_up = false;
        adapter->link_speed = 0;

        /* only continue if link was up previously */
        if (!netif_carrier_ok(netdev))
                return;

        /* poll for SFP+ cable when link is down */
        if (ixgbe_is_sfp(hw) && hw->mac.type == ixgbe_mac_82598EB)
                adapter->flags2 |= IXGBE_FLAG2_SEARCH_FOR_SFP;

        if (test_bit(__IXGBE_PTP_RUNNING, &adapter->state))
                ixgbe_ptp_start_cyclecounter(adapter);

        e_info(drv, "NIC Link is Down\n");
        netif_carrier_off(netdev);

        /* ping all the active vfs to let them know link has changed */
        ixgbe_ping_all_vfs(adapter);
}

static bool ixgbe_ring_tx_pending(struct ixgbe_adapter *adapter)
{
        int i;

        for (i = 0; i < adapter->num_tx_queues; i++) {
                struct ixgbe_ring *tx_ring = adapter->tx_ring[i];

                if (tx_ring->next_to_use != tx_ring->next_to_clean)
                        return true;
        }

        for (i = 0; i < adapter->num_xdp_queues; i++) {
                struct ixgbe_ring *ring = adapter->xdp_ring[i];

                if (ring->next_to_use != ring->next_to_clean)
                        return true;
        }

        return false;
}

static bool ixgbe_vf_tx_pending(struct ixgbe_adapter *adapter)
{
        struct ixgbe_hw *hw = &adapter->hw;
        struct ixgbe_ring_feature *vmdq = &adapter->ring_feature[RING_F_VMDQ];
        u32 q_per_pool = __ALIGN_MASK(1, ~vmdq->mask);

        int i, j;

        if (!adapter->num_vfs)
                return false;

        /* resetting the PF is only needed for MAC before X550 */
        if (hw->mac.type >= ixgbe_mac_X550)
                return false;

        for (i = 0; i < adapter->num_vfs; i++) {
                for (j = 0; j < q_per_pool; j++) {
                        u32 h, t;

                        h = IXGBE_READ_REG(hw, IXGBE_PVFTDHN(q_per_pool, i, j));
                        t = IXGBE_READ_REG(hw, IXGBE_PVFTDTN(q_per_pool, i, j));

                        if (h != t)
                                return true;
                }
        }

        return false;
}

/**
 * ixgbe_watchdog_flush_tx - flush queues on link down
 * @adapter: pointer to the device adapter structure
 **/
static void ixgbe_watchdog_flush_tx(struct ixgbe_adapter *adapter)
{
        if (!netif_carrier_ok(adapter->netdev)) {
                if (ixgbe_ring_tx_pending(adapter) ||
                    ixgbe_vf_tx_pending(adapter)) {
                        /* We've lost link, so the controller stops DMA,
                         * but we've got queued Tx work that's never going
                         * to get done, so reset controller to flush Tx.
                         * (Do the reset outside of interrupt context).
                         */
                        e_warn(drv, "initiating reset to clear Tx work after link loss\n");
                        set_bit(__IXGBE_RESET_REQUESTED, &adapter->state);
                }
        }
}

#ifdef CONFIG_PCI_IOV
static void ixgbe_check_for_bad_vf(struct ixgbe_adapter *adapter)
{
        struct ixgbe_hw *hw = &adapter->hw;
        struct pci_dev *pdev = adapter->pdev;
        unsigned int vf;
        u32 gpc;

        if (!(netif_carrier_ok(adapter->netdev)))
                return;

        gpc = IXGBE_READ_REG(hw, IXGBE_TXDGPC);
        if (gpc) /* If incrementing then no need for the check below */
                return;
        /* Check to see if a bad DMA write target from an errant or
         * malicious VF has caused a PCIe error.  If so then we can
         * issue a VFLR to the offending VF(s) and then resume without
         * requesting a full slot reset.
         */

        if (!pdev)
                return;

        /* check status reg for all VFs owned by this PF */
        for (vf = 0; vf < adapter->num_vfs; ++vf) {
                struct pci_dev *vfdev = adapter->vfinfo[vf].vfdev;
                u16 status_reg;

                if (!vfdev)
                        continue;
                pci_read_config_word(vfdev, PCI_STATUS, &status_reg);
                if (status_reg != IXGBE_FAILED_READ_CFG_WORD &&
                    status_reg & PCI_STATUS_REC_MASTER_ABORT)
                        pcie_flr(vfdev);
        }
}

static void ixgbe_spoof_check(struct ixgbe_adapter *adapter)
{
        u32 ssvpc;

        /* Do not perform spoof check for 82598 or if not in IOV mode */
        if (adapter->hw.mac.type == ixgbe_mac_82598EB ||
            adapter->num_vfs == 0)
                return;

        ssvpc = IXGBE_READ_REG(&adapter->hw, IXGBE_SSVPC);

        /*
         * ssvpc register is cleared on read, if zero then no
         * spoofed packets in the last interval.
         */
        if (!ssvpc)
                return;

        e_warn(drv, "%u Spoofed packets detected\n", ssvpc);
}
#else
static void ixgbe_spoof_check(struct ixgbe_adapter __always_unused *adapter)
{
}

static void
ixgbe_check_for_bad_vf(struct ixgbe_adapter __always_unused *adapter)
{
}
#endif /* CONFIG_PCI_IOV */


/**
 * ixgbe_watchdog_subtask - check and bring link up
 * @adapter: pointer to the device adapter structure
 **/
static void ixgbe_watchdog_subtask(struct ixgbe_adapter *adapter)
{
        /* if interface is down, removing or resetting, do nothing */
        if (test_bit(__IXGBE_DOWN, &adapter->state) ||
            test_bit(__IXGBE_REMOVING, &adapter->state) ||
            test_bit(__IXGBE_RESETTING, &adapter->state))
                return;

        ixgbe_watchdog_update_link(adapter);

        if (adapter->link_up)
                ixgbe_watchdog_link_is_up(adapter);
        else
                ixgbe_watchdog_link_is_down(adapter);

        ixgbe_check_for_bad_vf(adapter);
        ixgbe_spoof_check(adapter);
        ixgbe_update_stats(adapter);

        ixgbe_watchdog_flush_tx(adapter);
}

/**
 * ixgbe_sfp_detection_subtask - poll for SFP+ cable
 * @adapter: the ixgbe adapter structure
 **/
static void ixgbe_sfp_detection_subtask(struct ixgbe_adapter *adapter)
{
        struct ixgbe_hw *hw = &adapter->hw;
        s32 err;

        /* not searching for SFP so there is nothing to do here */
        if (!(adapter->flags2 & IXGBE_FLAG2_SEARCH_FOR_SFP) &&
            !(adapter->flags2 & IXGBE_FLAG2_SFP_NEEDS_RESET))
                return;

        if (adapter->sfp_poll_time &&
            time_after(adapter->sfp_poll_time, jiffies))
                return; /* If not yet time to poll for SFP */

        /* someone else is in init, wait until next service event */
        if (test_and_set_bit(__IXGBE_IN_SFP_INIT, &adapter->state))
                return;

        adapter->sfp_poll_time = jiffies + IXGBE_SFP_POLL_JIFFIES - 1;

        err = hw->phy.ops.identify_sfp(hw);
        if (err == IXGBE_ERR_SFP_NOT_SUPPORTED)
                goto sfp_out;

        if (err == IXGBE_ERR_SFP_NOT_PRESENT) {
                /* If no cable is present, then we need to reset
                 * the next time we find a good cable. */
                adapter->flags2 |= IXGBE_FLAG2_SFP_NEEDS_RESET;
        }

        /* exit on error */
        if (err)
                goto sfp_out;

        /* exit if reset not needed */
        if (!(adapter->flags2 & IXGBE_FLAG2_SFP_NEEDS_RESET))
                goto sfp_out;

        adapter->flags2 &= ~IXGBE_FLAG2_SFP_NEEDS_RESET;

        /*
         * A module may be identified correctly, but the EEPROM may not have
         * support for that module.  setup_sfp() will fail in that case, so
         * we should not allow that module to load.
         */
        if (hw->mac.type == ixgbe_mac_82598EB)
                err = hw->phy.ops.reset(hw);
        else
                err = hw->mac.ops.setup_sfp(hw);

        if (err == IXGBE_ERR_SFP_NOT_SUPPORTED)
                goto sfp_out;

        adapter->flags |= IXGBE_FLAG_NEED_LINK_CONFIG;
        e_info(probe, "detected SFP+: %d\n", hw->phy.sfp_type);

sfp_out:
        clear_bit(__IXGBE_IN_SFP_INIT, &adapter->state);

        if ((err == IXGBE_ERR_SFP_NOT_SUPPORTED) &&
            (adapter->netdev->reg_state == NETREG_REGISTERED)) {
                e_dev_err("failed to initialize because an unsupported "
                          "SFP+ module type was detected.\n");
                e_dev_err("Reload the driver after installing a "
                          "supported module.\n");
                unregister_netdev(adapter->netdev);
        }
}

/**
 * ixgbe_sfp_link_config_subtask - set up link SFP after module install
 * @adapter: the ixgbe adapter structure
 **/
static void ixgbe_sfp_link_config_subtask(struct ixgbe_adapter *adapter)
{
        struct ixgbe_hw *hw = &adapter->hw;
        u32 cap_speed;
        u32 speed;
        bool autoneg = false;

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

        /* someone else is in init, wait until next service event */
        if (test_and_set_bit(__IXGBE_IN_SFP_INIT, &adapter->state))
                return;

        adapter->flags &= ~IXGBE_FLAG_NEED_LINK_CONFIG;

        hw->mac.ops.get_link_capabilities(hw, &cap_speed, &autoneg);

        /* advertise highest capable link speed */
        if (!autoneg && (cap_speed & IXGBE_LINK_SPEED_10GB_FULL))
                speed = IXGBE_LINK_SPEED_10GB_FULL;
        else
                speed = cap_speed & (IXGBE_LINK_SPEED_10GB_FULL |
                                     IXGBE_LINK_SPEED_1GB_FULL);

        if (hw->mac.ops.setup_link)
                hw->mac.ops.setup_link(hw, speed, true);

        adapter->flags |= IXGBE_FLAG_NEED_LINK_UPDATE;
        adapter->link_check_timeout = jiffies;
        clear_bit(__IXGBE_IN_SFP_INIT, &adapter->state);
}

/**
 * ixgbe_service_timer - Timer Call-back
 * @t: pointer to timer_list structure
 **/
static void ixgbe_service_timer(struct timer_list *t)
{
        struct ixgbe_adapter *adapter = from_timer(adapter, t, service_timer);
        unsigned long next_event_offset;

        /* poll faster when waiting for link */
        if (adapter->flags & IXGBE_FLAG_NEED_LINK_UPDATE)
                next_event_offset = HZ / 10;
        else
                next_event_offset = HZ * 2;

        /* Reset the timer */
        mod_timer(&adapter->service_timer, next_event_offset + jiffies);

        ixgbe_service_event_schedule(adapter);
}

static void ixgbe_phy_interrupt_subtask(struct ixgbe_adapter *adapter)
{
        struct ixgbe_hw *hw = &adapter->hw;
        u32 status;

        if (!(adapter->flags2 & IXGBE_FLAG2_PHY_INTERRUPT))
                return;

        adapter->flags2 &= ~IXGBE_FLAG2_PHY_INTERRUPT;

        if (!hw->phy.ops.handle_lasi)
                return;

        status = hw->phy.ops.handle_lasi(&adapter->hw);
        if (status != IXGBE_ERR_OVERTEMP)
                return;

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

static void ixgbe_reset_subtask(struct ixgbe_adapter *adapter)
{
        if (!test_and_clear_bit(__IXGBE_RESET_REQUESTED, &adapter->state))
                return;

        rtnl_lock();
        /* If we're already down, removing or resetting, just bail */
        if (test_bit(__IXGBE_DOWN, &adapter->state) ||
            test_bit(__IXGBE_REMOVING, &adapter->state) ||
            test_bit(__IXGBE_RESETTING, &adapter->state)) {
                rtnl_unlock();
                return;
        }

        ixgbe_dump(adapter);
        netdev_err(adapter->netdev, "Reset adapter\n");
        adapter->tx_timeout_count++;

        ixgbe_reinit_locked(adapter);
        rtnl_unlock();
}

/**
 * ixgbe_check_fw_error - Check firmware for errors
 * @adapter: the adapter private structure
 *
 * Check firmware errors in register FWSM
 */
static bool ixgbe_check_fw_error(struct ixgbe_adapter *adapter)
{
        struct ixgbe_hw *hw = &adapter->hw;
        u32 fwsm;

        /* read fwsm.ext_err_ind register and log errors */
        fwsm = IXGBE_READ_REG(hw, IXGBE_FWSM(hw));

        if (fwsm & IXGBE_FWSM_EXT_ERR_IND_MASK ||
            !(fwsm & IXGBE_FWSM_FW_VAL_BIT))
                e_dev_warn("Warning firmware error detected FWSM: 0x%08X\n",
                           fwsm);

        if (hw->mac.ops.fw_recovery_mode && hw->mac.ops.fw_recovery_mode(hw)) {
                e_dev_err("Firmware recovery mode detected. Limiting functionality. Refer to the Intel(R) Ethernet Adapters and Devices User Guide for details on firmware recovery mode.\n");
                return true;
        }

        return false;
}

/**
 * ixgbe_service_task - manages and runs subtasks
 * @work: pointer to work_struct containing our data
 **/
static void ixgbe_service_task(struct work_struct *work)
{
        struct ixgbe_adapter *adapter = container_of(work,
                                                     struct ixgbe_adapter,
                                                     service_task);
        if (ixgbe_removed(adapter->hw.hw_addr)) {
                if (!test_bit(__IXGBE_DOWN, &adapter->state)) {
                        rtnl_lock();
                        ixgbe_down(adapter);
                        rtnl_unlock();
                }
                ixgbe_service_event_complete(adapter);
                return;
        }
        if (ixgbe_check_fw_error(adapter)) {
                if (!test_bit(__IXGBE_DOWN, &adapter->state))
                        unregister_netdev(adapter->netdev);
                ixgbe_service_event_complete(adapter);
                return;
        }
        ixgbe_reset_subtask(adapter);
        ixgbe_phy_interrupt_subtask(adapter);
        ixgbe_sfp_detection_subtask(adapter);
        ixgbe_sfp_link_config_subtask(adapter);
        ixgbe_check_overtemp_subtask(adapter);
        ixgbe_watchdog_subtask(adapter);
        ixgbe_fdir_reinit_subtask(adapter);
        ixgbe_check_hang_subtask(adapter);

        if (test_bit(__IXGBE_PTP_RUNNING, &adapter->state)) {
                ixgbe_ptp_overflow_check(adapter);
                if (adapter->flags & IXGBE_FLAG_RX_HWTSTAMP_IN_REGISTER)
                        ixgbe_ptp_rx_hang(adapter);
                ixgbe_ptp_tx_hang(adapter);
        }

        ixgbe_service_event_complete(adapter);
}

static int ixgbe_tso(struct ixgbe_ring *tx_ring,
                     struct ixgbe_tx_buffer *first,
                     u8 *hdr_len,
                     struct ixgbe_ipsec_tx_data *itd)
{
        u32 vlan_macip_lens, type_tucmd, mss_l4len_idx;
        struct sk_buff *skb = first->skb;
        union {
                struct iphdr *v4;
                struct ipv6hdr *v6;
                unsigned char *hdr;
        } ip;
        union {
                struct tcphdr *tcp;
                struct udphdr *udp;
                unsigned char *hdr;
        } l4;
        u32 paylen, l4_offset;
        u32 fceof_saidx = 0;
        int err;

        if (skb->ip_summed != CHECKSUM_PARTIAL)
                return 0;

        if (!skb_is_gso(skb))
                return 0;

        err = skb_cow_head(skb, 0);
        if (err < 0)
                return err;

        if (eth_p_mpls(first->protocol))
                ip.hdr = skb_inner_network_header(skb);
        else
                ip.hdr = skb_network_header(skb);
        l4.hdr = skb_checksum_start(skb);

        /* ADV DTYP TUCMD MKRLOC/ISCSIHEDLEN */
        type_tucmd = (skb_shinfo(skb)->gso_type & SKB_GSO_UDP_L4) ?
                      IXGBE_ADVTXD_TUCMD_L4T_UDP : IXGBE_ADVTXD_TUCMD_L4T_TCP;

        /* initialize outer IP header fields */
        if (ip.v4->version == 4) {
                unsigned char *csum_start = skb_checksum_start(skb);
                unsigned char *trans_start = ip.hdr + (ip.v4->ihl * 4);
                int len = csum_start - trans_start;

                /* IP header will have to cancel out any data that
                 * is not a part of the outer IP header, so set to
                 * a reverse csum if needed, else init check to 0.
                 */
                ip.v4->check = (skb_shinfo(skb)->gso_type & SKB_GSO_PARTIAL) ?
                                           csum_fold(csum_partial(trans_start,
                                                                  len, 0)) : 0;
                type_tucmd |= IXGBE_ADVTXD_TUCMD_IPV4;

                ip.v4->tot_len = 0;
                first->tx_flags |= IXGBE_TX_FLAGS_TSO |
                                   IXGBE_TX_FLAGS_CSUM |
                                   IXGBE_TX_FLAGS_IPV4;
        } else {
                ip.v6->payload_len = 0;
                first->tx_flags |= IXGBE_TX_FLAGS_TSO |
                                   IXGBE_TX_FLAGS_CSUM;
        }

        /* determine offset of inner transport header */
        l4_offset = l4.hdr - skb->data;

        /* remove payload length from inner checksum */
        paylen = skb->len - l4_offset;

        if (type_tucmd & IXGBE_ADVTXD_TUCMD_L4T_TCP) {
                /* compute length of segmentation header */
                *hdr_len = (l4.tcp->doff * 4) + l4_offset;
                csum_replace_by_diff(&l4.tcp->check,
                                     (__force __wsum)htonl(paylen));
        } else {
                /* compute length of segmentation header */
                *hdr_len = sizeof(*l4.udp) + l4_offset;
                csum_replace_by_diff(&l4.udp->check,
                                     (__force __wsum)htonl(paylen));
        }

        /* update gso size and bytecount with header size */
        first->gso_segs = skb_shinfo(skb)->gso_segs;
        first->bytecount += (first->gso_segs - 1) * *hdr_len;

        /* mss_l4len_id: use 0 as index for TSO */
        mss_l4len_idx = (*hdr_len - l4_offset) << IXGBE_ADVTXD_L4LEN_SHIFT;
        mss_l4len_idx |= skb_shinfo(skb)->gso_size << IXGBE_ADVTXD_MSS_SHIFT;

        fceof_saidx |= itd->sa_idx;
        type_tucmd |= itd->flags | itd->trailer_len;

        /* vlan_macip_lens: HEADLEN, MACLEN, VLAN tag */
        vlan_macip_lens = l4.hdr - ip.hdr;
        vlan_macip_lens |= (ip.hdr - skb->data) << IXGBE_ADVTXD_MACLEN_SHIFT;
        vlan_macip_lens |= first->tx_flags & IXGBE_TX_FLAGS_VLAN_MASK;

        ixgbe_tx_ctxtdesc(tx_ring, vlan_macip_lens, fceof_saidx, type_tucmd,
                          mss_l4len_idx);

        return 1;
}

static void ixgbe_tx_csum(struct ixgbe_ring *tx_ring,
                          struct ixgbe_tx_buffer *first,
                          struct ixgbe_ipsec_tx_data *itd)
{
        struct sk_buff *skb = first->skb;
        u32 vlan_macip_lens = 0;
        u32 fceof_saidx = 0;
        u32 type_tucmd = 0;

        if (skb->ip_summed != CHECKSUM_PARTIAL) {
csum_failed:
                if (!(first->tx_flags & (IXGBE_TX_FLAGS_HW_VLAN |
                                         IXGBE_TX_FLAGS_CC)))
                        return;
                goto no_csum;
        }

        switch (skb->csum_offset) {
        case offsetof(struct tcphdr, check):
                type_tucmd = IXGBE_ADVTXD_TUCMD_L4T_TCP;
                fallthrough;
        case offsetof(struct udphdr, check):
                break;
        case offsetof(struct sctphdr, checksum):
                /* validate that this is actually an SCTP request */
                if (skb_csum_is_sctp(skb)) {
                        type_tucmd = IXGBE_ADVTXD_TUCMD_L4T_SCTP;
                        break;
                }
                fallthrough;
        default:
                skb_checksum_help(skb);
                goto csum_failed;
        }

        /* update TX checksum flag */
        first->tx_flags |= IXGBE_TX_FLAGS_CSUM;
        vlan_macip_lens = skb_checksum_start_offset(skb) -
                          skb_network_offset(skb);
no_csum:
        /* vlan_macip_lens: MACLEN, VLAN tag */
        vlan_macip_lens |= skb_network_offset(skb) << IXGBE_ADVTXD_MACLEN_SHIFT;
        vlan_macip_lens |= first->tx_flags & IXGBE_TX_FLAGS_VLAN_MASK;

        fceof_saidx |= itd->sa_idx;
        type_tucmd |= itd->flags | itd->trailer_len;

        ixgbe_tx_ctxtdesc(tx_ring, vlan_macip_lens, fceof_saidx, type_tucmd, 0);
}

#define IXGBE_SET_FLAG(_input, _flag, _result) \
        ((_flag <= _result) ? \
         ((u32)(_input & _flag) * (_result / _flag)) : \
         ((u32)(_input & _flag) / (_flag / _result)))

static u32 ixgbe_tx_cmd_type(struct sk_buff *skb, u32 tx_flags)
{
        /* set type for advanced descriptor with frame checksum insertion */
        u32 cmd_type = IXGBE_ADVTXD_DTYP_DATA |
                       IXGBE_ADVTXD_DCMD_DEXT |
                       IXGBE_ADVTXD_DCMD_IFCS;

        /* set HW vlan bit if vlan is present */
        cmd_type |= IXGBE_SET_FLAG(tx_flags, IXGBE_TX_FLAGS_HW_VLAN,
                                   IXGBE_ADVTXD_DCMD_VLE);

        /* set segmentation enable bits for TSO/FSO */
        cmd_type |= IXGBE_SET_FLAG(tx_flags, IXGBE_TX_FLAGS_TSO,
                                   IXGBE_ADVTXD_DCMD_TSE);

        /* set timestamp bit if present */
        cmd_type |= IXGBE_SET_FLAG(tx_flags, IXGBE_TX_FLAGS_TSTAMP,
                                   IXGBE_ADVTXD_MAC_TSTAMP);

        /* insert frame checksum */
        cmd_type ^= IXGBE_SET_FLAG(skb->no_fcs, 1, IXGBE_ADVTXD_DCMD_IFCS);

        return cmd_type;
}

static void ixgbe_tx_olinfo_status(union ixgbe_adv_tx_desc *tx_desc,
                                   u32 tx_flags, unsigned int paylen)
{
        u32 olinfo_status = paylen << IXGBE_ADVTXD_PAYLEN_SHIFT;

        /* enable L4 checksum for TSO and TX checksum offload */
        olinfo_status |= IXGBE_SET_FLAG(tx_flags,
                                        IXGBE_TX_FLAGS_CSUM,
                                        IXGBE_ADVTXD_POPTS_TXSM);

        /* enable IPv4 checksum for TSO */
        olinfo_status |= IXGBE_SET_FLAG(tx_flags,
                                        IXGBE_TX_FLAGS_IPV4,
                                        IXGBE_ADVTXD_POPTS_IXSM);

        /* enable IPsec */
        olinfo_status |= IXGBE_SET_FLAG(tx_flags,
                                        IXGBE_TX_FLAGS_IPSEC,
                                        IXGBE_ADVTXD_POPTS_IPSEC);

        /*
         * Check Context must be set if Tx switch is enabled, which it
         * always is for case where virtual functions are running
         */
        olinfo_status |= IXGBE_SET_FLAG(tx_flags,
                                        IXGBE_TX_FLAGS_CC,
                                        IXGBE_ADVTXD_CC);

        tx_desc->read.olinfo_status = cpu_to_le32(olinfo_status);
}

static int __ixgbe_maybe_stop_tx(struct ixgbe_ring *tx_ring, u16 size)
{
        netif_stop_subqueue(tx_ring->netdev, tx_ring->queue_index);

        /* Herbert's original patch had:
         *  smp_mb__after_netif_stop_queue();
         * but since that doesn't exist yet, just open code it.
         */
        smp_mb();

        /* We need to check again in a case another CPU has just
         * made room available.
         */
        if (likely(ixgbe_desc_unused(tx_ring) < size))
                return -EBUSY;

        /* A reprieve! - use start_queue because it doesn't call schedule */
        netif_start_subqueue(tx_ring->netdev, tx_ring->queue_index);
        ++tx_ring->tx_stats.restart_queue;
        return 0;
}

static inline int ixgbe_maybe_stop_tx(struct ixgbe_ring *tx_ring, u16 size)
{
        if (likely(ixgbe_desc_unused(tx_ring) >= size))
                return 0;

        return __ixgbe_maybe_stop_tx(tx_ring, size);
}

static int ixgbe_tx_map(struct ixgbe_ring *tx_ring,
                        struct ixgbe_tx_buffer *first,
                        const u8 hdr_len)
{
        struct sk_buff *skb = first->skb;
        struct ixgbe_tx_buffer *tx_buffer;
        union ixgbe_adv_tx_desc *tx_desc;
        skb_frag_t *frag;
        dma_addr_t dma;
        unsigned int data_len, size;
        u32 tx_flags = first->tx_flags;
        u32 cmd_type = ixgbe_tx_cmd_type(skb, tx_flags);
        u16 i = tx_ring->next_to_use;

        tx_desc = IXGBE_TX_DESC(tx_ring, i);

        ixgbe_tx_olinfo_status(tx_desc, tx_flags, skb->len - hdr_len);

        size = skb_headlen(skb);
        data_len = skb->data_len;

#ifdef IXGBE_FCOE
        if (tx_flags & IXGBE_TX_FLAGS_FCOE) {
                if (data_len < sizeof(struct fcoe_crc_eof)) {
                        size -= sizeof(struct fcoe_crc_eof) - data_len;
                        data_len = 0;
                } else {
                        data_len -= sizeof(struct fcoe_crc_eof);
                }
        }

#endif
        dma = dma_map_single(tx_ring->dev, skb->data, size, DMA_TO_DEVICE);

        tx_buffer = first;

        for (frag = &skb_shinfo(skb)->frags[0];; frag++) {
                if (dma_mapping_error(tx_ring->dev, dma))
                        goto dma_error;

                /* record length, and DMA address */
                dma_unmap_len_set(tx_buffer, len, size);
                dma_unmap_addr_set(tx_buffer, dma, dma);

                tx_desc->read.buffer_addr = cpu_to_le64(dma);

                while (unlikely(size > IXGBE_MAX_DATA_PER_TXD)) {
                        tx_desc->read.cmd_type_len =
                                cpu_to_le32(cmd_type ^ IXGBE_MAX_DATA_PER_TXD);

                        i++;
                        tx_desc++;
                        if (i == tx_ring->count) {
                                tx_desc = IXGBE_TX_DESC(tx_ring, 0);
                                i = 0;
                        }
                        tx_desc->read.olinfo_status = 0;

                        dma += IXGBE_MAX_DATA_PER_TXD;
                        size -= IXGBE_MAX_DATA_PER_TXD;

                        tx_desc->read.buffer_addr = cpu_to_le64(dma);
                }

                if (likely(!data_len))
                        break;

                tx_desc->read.cmd_type_len = cpu_to_le32(cmd_type ^ size);

                i++;
                tx_desc++;
                if (i == tx_ring->count) {
                        tx_desc = IXGBE_TX_DESC(tx_ring, 0);
                        i = 0;
                }
                tx_desc->read.olinfo_status = 0;

#ifdef IXGBE_FCOE
                size = min_t(unsigned int, data_len, skb_frag_size(frag));
#else
                size = skb_frag_size(frag);
#endif
                data_len -= size;

                dma = skb_frag_dma_map(tx_ring->dev, frag, 0, size,
                                       DMA_TO_DEVICE);

                tx_buffer = &tx_ring->tx_buffer_info[i];
        }

        /* write last descriptor with RS and EOP bits */
        cmd_type |= size | IXGBE_TXD_CMD;
        tx_desc->read.cmd_type_len = cpu_to_le32(cmd_type);

        netdev_tx_sent_queue(txring_txq(tx_ring), first->bytecount);

        /* set the timestamp */
        first->time_stamp = jiffies;

        skb_tx_timestamp(skb);

        /*
         * Force memory writes to complete before letting h/w know there
         * are new descriptors to fetch.  (Only applicable for weak-ordered
         * memory model archs, such as IA-64).
         *
         * We also need this memory barrier to make certain all of the
         * status bits have been updated before next_to_watch is written.
         */
        wmb();

        /* set next_to_watch value indicating a packet is present */
        first->next_to_watch = tx_desc;

        i++;
        if (i == tx_ring->count)
                i = 0;

        tx_ring->next_to_use = i;

        ixgbe_maybe_stop_tx(tx_ring, DESC_NEEDED);

        if (netif_xmit_stopped(txring_txq(tx_ring)) || !netdev_xmit_more()) {
                writel(i, tx_ring->tail);
        }

        return 0;
dma_error:
        dev_err(tx_ring->dev, "TX DMA map failed\n");

        /* clear dma mappings for failed tx_buffer_info map */
        for (;;) {
                tx_buffer = &tx_ring->tx_buffer_info[i];
                if (dma_unmap_len(tx_buffer, len))
                        dma_unmap_page(tx_ring->dev,
                                       dma_unmap_addr(tx_buffer, dma),
                                       dma_unmap_len(tx_buffer, len),
                                       DMA_TO_DEVICE);
                dma_unmap_len_set(tx_buffer, len, 0);
                if (tx_buffer == first)
                        break;
                if (i == 0)
                        i += tx_ring->count;
                i--;
        }

        dev_kfree_skb_any(first->skb);
        first->skb = NULL;

        tx_ring->next_to_use = i;

        return -1;
}

static void ixgbe_atr(struct ixgbe_ring *ring,
                      struct ixgbe_tx_buffer *first)
{
        struct ixgbe_q_vector *q_vector = ring->q_vector;
        union ixgbe_atr_hash_dword input = { .dword = 0 };
        union ixgbe_atr_hash_dword common = { .dword = 0 };
        union {
                unsigned char *network;
                struct iphdr *ipv4;
                struct ipv6hdr *ipv6;
        } hdr;
        struct tcphdr *th;
        unsigned int hlen;
        struct sk_buff *skb;
        __be16 vlan_id;
        int l4_proto;

        /* if ring doesn't have a interrupt vector, cannot perform ATR */
        if (!q_vector)
                return;

        /* do nothing if sampling is disabled */
        if (!ring->atr_sample_rate)
                return;

        ring->atr_count++;

        /* currently only IPv4/IPv6 with TCP is supported */
        if ((first->protocol != htons(ETH_P_IP)) &&
            (first->protocol != htons(ETH_P_IPV6)))
                return;

        /* snag network header to get L4 type and address */
        skb = first->skb;
        hdr.network = skb_network_header(skb);
        if (unlikely(hdr.network <= skb->data))
                return;
        if (skb->encapsulation &&
            first->protocol == htons(ETH_P_IP) &&
            hdr.ipv4->protocol == IPPROTO_UDP) {
                struct ixgbe_adapter *adapter = q_vector->adapter;

                if (unlikely(skb_tail_pointer(skb) < hdr.network +
                             VXLAN_HEADROOM))
                        return;

                /* verify the port is recognized as VXLAN */
                if (adapter->vxlan_port &&
                    udp_hdr(skb)->dest == adapter->vxlan_port)
                        hdr.network = skb_inner_network_header(skb);

                if (adapter->geneve_port &&
                    udp_hdr(skb)->dest == adapter->geneve_port)
                        hdr.network = skb_inner_network_header(skb);
        }

        /* Make sure we have at least [minimum IPv4 header + TCP]
         * or [IPv6 header] bytes
         */
        if (unlikely(skb_tail_pointer(skb) < hdr.network + 40))
                return;

        /* Currently only IPv4/IPv6 with TCP is supported */
        switch (hdr.ipv4->version) {
        case IPVERSION:
                /* access ihl as u8 to avoid unaligned access on ia64 */
                hlen = (hdr.network[0] & 0x0F) << 2;
                l4_proto = hdr.ipv4->protocol;
                break;
        case 6:
                hlen = hdr.network - skb->data;
                l4_proto = ipv6_find_hdr(skb, &hlen, IPPROTO_TCP, NULL, NULL);
                hlen -= hdr.network - skb->data;
                break;
        default:
                return;
        }

        if (l4_proto != IPPROTO_TCP)
                return;

        if (unlikely(skb_tail_pointer(skb) < hdr.network +
                     hlen + sizeof(struct tcphdr)))
                return;

        th = (struct tcphdr *)(hdr.network + hlen);

        /* skip this packet since the socket is closing */
        if (th->fin)
                return;

        /* sample on all syn packets or once every atr sample count */
        if (!th->syn && (ring->atr_count < ring->atr_sample_rate))
                return;

        /* reset sample count */
        ring->atr_count = 0;

        vlan_id = htons(first->tx_flags >> IXGBE_TX_FLAGS_VLAN_SHIFT);

        /*
         * src and dst are inverted, think how the receiver sees them
         *
         * The input is broken into two sections, a non-compressed section
         * containing vm_pool, vlan_id, and flow_type.  The rest of the data
         * is XORed together and stored in the compressed dword.
         */
        input.formatted.vlan_id = vlan_id;

        /*
         * since src port and flex bytes occupy the same word XOR them together
         * and write the value to source port portion of compressed dword
         */
        if (first->tx_flags & (IXGBE_TX_FLAGS_SW_VLAN | IXGBE_TX_FLAGS_HW_VLAN))
                common.port.src ^= th->dest ^ htons(ETH_P_8021Q);
        else
                common.port.src ^= th->dest ^ first->protocol;
        common.port.dst ^= th->source;

        switch (hdr.ipv4->version) {
        case IPVERSION:
                input.formatted.flow_type = IXGBE_ATR_FLOW_TYPE_TCPV4;
                common.ip ^= hdr.ipv4->saddr ^ hdr.ipv4->daddr;
                break;
        case 6:
                input.formatted.flow_type = IXGBE_ATR_FLOW_TYPE_TCPV6;
                common.ip ^= hdr.ipv6->saddr.s6_addr32[0] ^
                             hdr.ipv6->saddr.s6_addr32[1] ^
                             hdr.ipv6->saddr.s6_addr32[2] ^
                             hdr.ipv6->saddr.s6_addr32[3] ^
                             hdr.ipv6->daddr.s6_addr32[0] ^
                             hdr.ipv6->daddr.s6_addr32[1] ^
                             hdr.ipv6->daddr.s6_addr32[2] ^
                             hdr.ipv6->daddr.s6_addr32[3];
                break;
        default:
                break;
        }

        if (hdr.network != skb_network_header(skb))
                input.formatted.flow_type |= IXGBE_ATR_L4TYPE_TUNNEL_MASK;

        /* This assumes the Rx queue and Tx queue are bound to the same CPU */
        ixgbe_fdir_add_signature_filter_82599(&q_vector->adapter->hw,
                                              input, common, ring->queue_index);
}

#ifdef IXGBE_FCOE
static u16 ixgbe_select_queue(struct net_device *dev, struct sk_buff *skb,
                              struct net_device *sb_dev)
{
        struct ixgbe_adapter *adapter;
        struct ixgbe_ring_feature *f;
        int txq;

        if (sb_dev) {
                u8 tc = netdev_get_prio_tc_map(dev, skb->priority);
                struct net_device *vdev = sb_dev;

                txq = vdev->tc_to_txq[tc].offset;
                txq += reciprocal_scale(skb_get_hash(skb),
                                        vdev->tc_to_txq[tc].count);

                return txq;
        }

        /*
         * only execute the code below if protocol is FCoE
         * or FIP and we have FCoE enabled on the adapter
         */
        switch (vlan_get_protocol(skb)) {
        case htons(ETH_P_FCOE):
        case htons(ETH_P_FIP):
                adapter = netdev_priv(dev);

                if (!sb_dev && (adapter->flags & IXGBE_FLAG_FCOE_ENABLED))
                        break;
                fallthrough;
        default:
                return netdev_pick_tx(dev, skb, sb_dev);
        }

        f = &adapter->ring_feature[RING_F_FCOE];

        txq = skb_rx_queue_recorded(skb) ? skb_get_rx_queue(skb) :
                                           smp_processor_id();

        while (txq >= f->indices)
                txq -= f->indices;

        return txq + f->offset;
}

#endif
int ixgbe_xmit_xdp_ring(struct ixgbe_adapter *adapter,
                        struct xdp_frame *xdpf)
{
        struct ixgbe_ring *ring = adapter->xdp_ring[smp_processor_id()];
        struct ixgbe_tx_buffer *tx_buffer;
        union ixgbe_adv_tx_desc *tx_desc;
        u32 len, cmd_type;
        dma_addr_t dma;
        u16 i;

        len = xdpf->len;

        if (unlikely(!ixgbe_desc_unused(ring)))
                return IXGBE_XDP_CONSUMED;

        dma = dma_map_single(ring->dev, xdpf->data, len, DMA_TO_DEVICE);
        if (dma_mapping_error(ring->dev, dma))
                return IXGBE_XDP_CONSUMED;

        /* record the location of the first descriptor for this packet */
        tx_buffer = &ring->tx_buffer_info[ring->next_to_use];
        tx_buffer->bytecount = len;
        tx_buffer->gso_segs = 1;
        tx_buffer->protocol = 0;

        i = ring->next_to_use;
        tx_desc = IXGBE_TX_DESC(ring, i);

        dma_unmap_len_set(tx_buffer, len, len);
        dma_unmap_addr_set(tx_buffer, dma, dma);
        tx_buffer->xdpf = xdpf;

        tx_desc->read.buffer_addr = cpu_to_le64(dma);

        /* put descriptor type bits */
        cmd_type = IXGBE_ADVTXD_DTYP_DATA |
                   IXGBE_ADVTXD_DCMD_DEXT |
                   IXGBE_ADVTXD_DCMD_IFCS;
        cmd_type |= len | IXGBE_TXD_CMD;
        tx_desc->read.cmd_type_len = cpu_to_le32(cmd_type);
        tx_desc->read.olinfo_status =
                cpu_to_le32(len << IXGBE_ADVTXD_PAYLEN_SHIFT);

        /* Avoid any potential race with xdp_xmit and cleanup */
        smp_wmb();

        /* set next_to_watch value indicating a packet is present */
        i++;
        if (i == ring->count)
                i = 0;

        tx_buffer->next_to_watch = tx_desc;
        ring->next_to_use = i;

        return IXGBE_XDP_TX;
}

netdev_tx_t ixgbe_xmit_frame_ring(struct sk_buff *skb,
                          struct ixgbe_adapter *adapter,
                          struct ixgbe_ring *tx_ring)
{
        struct ixgbe_tx_buffer *first;
        int tso;
        u32 tx_flags = 0;
        unsigned short f;
        u16 count = TXD_USE_COUNT(skb_headlen(skb));
        struct ixgbe_ipsec_tx_data ipsec_tx = { 0 };
        __be16 protocol = skb->protocol;
        u8 hdr_len = 0;

        /*
         * need: 1 descriptor per page * PAGE_SIZE/IXGBE_MAX_DATA_PER_TXD,
         *       + 1 desc for skb_headlen/IXGBE_MAX_DATA_PER_TXD,
         *       + 2 desc gap to keep tail from touching head,
         *       + 1 desc for context descriptor,
         * otherwise try next time
         */
        for (f = 0; f < skb_shinfo(skb)->nr_frags; f++)
                count += TXD_USE_COUNT(skb_frag_size(
                                                &skb_shinfo(skb)->frags[f]));

        if (ixgbe_maybe_stop_tx(tx_ring, count + 3)) {
                tx_ring->tx_stats.tx_busy++;
                return NETDEV_TX_BUSY;
        }

        /* record the location of the first descriptor for this packet */
        first = &tx_ring->tx_buffer_info[tx_ring->next_to_use];
        first->skb = skb;
        first->bytecount = skb->len;
        first->gso_segs = 1;

        /* if we have a HW VLAN tag being added default to the HW one */
        if (skb_vlan_tag_present(skb)) {
                tx_flags |= skb_vlan_tag_get(skb) << IXGBE_TX_FLAGS_VLAN_SHIFT;
                tx_flags |= IXGBE_TX_FLAGS_HW_VLAN;
        /* else if it is a SW VLAN check the next protocol and store the tag */
        } else if (protocol == htons(ETH_P_8021Q)) {
                struct vlan_hdr *vhdr, _vhdr;
                vhdr = skb_header_pointer(skb, ETH_HLEN, sizeof(_vhdr), &_vhdr);
                if (!vhdr)
                        goto out_drop;

                tx_flags |= ntohs(vhdr->h_vlan_TCI) <<
                                  IXGBE_TX_FLAGS_VLAN_SHIFT;
                tx_flags |= IXGBE_TX_FLAGS_SW_VLAN;
        }
        protocol = vlan_get_protocol(skb);

        if (unlikely(skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP) &&
            adapter->ptp_clock) {
                if (adapter->tstamp_config.tx_type == HWTSTAMP_TX_ON &&
                    !test_and_set_bit_lock(__IXGBE_PTP_TX_IN_PROGRESS,
                                           &adapter->state)) {
                        skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS;
                        tx_flags |= IXGBE_TX_FLAGS_TSTAMP;

                        /* schedule check for Tx timestamp */
                        adapter->ptp_tx_skb = skb_get(skb);
                        adapter->ptp_tx_start = jiffies;
                        schedule_work(&adapter->ptp_tx_work);
                } else {
                        adapter->tx_hwtstamp_skipped++;
                }
        }

#ifdef CONFIG_PCI_IOV
        /*
         * Use the l2switch_enable flag - would be false if the DMA
         * Tx switch had been disabled.
         */
        if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)
                tx_flags |= IXGBE_TX_FLAGS_CC;

#endif
        /* DCB maps skb priorities 0-7 onto 3 bit PCP of VLAN tag. */
        if ((adapter->flags & IXGBE_FLAG_DCB_ENABLED) &&
            ((tx_flags & (IXGBE_TX_FLAGS_HW_VLAN | IXGBE_TX_FLAGS_SW_VLAN)) ||
             (skb->priority != TC_PRIO_CONTROL))) {
                tx_flags &= ~IXGBE_TX_FLAGS_VLAN_PRIO_MASK;
                tx_flags |= (skb->priority & 0x7) <<
                                        IXGBE_TX_FLAGS_VLAN_PRIO_SHIFT;
                if (tx_flags & IXGBE_TX_FLAGS_SW_VLAN) {
                        struct vlan_ethhdr *vhdr;

                        if (skb_cow_head(skb, 0))
                                goto out_drop;
                        vhdr = (struct vlan_ethhdr *)skb->data;
                        vhdr->h_vlan_TCI = htons(tx_flags >>
                                                 IXGBE_TX_FLAGS_VLAN_SHIFT);
                } else {
                        tx_flags |= IXGBE_TX_FLAGS_HW_VLAN;
                }
        }

        /* record initial flags and protocol */
        first->tx_flags = tx_flags;
        first->protocol = protocol;

#ifdef IXGBE_FCOE
        /* setup tx offload for FCoE */
        if ((protocol == htons(ETH_P_FCOE)) &&
            (tx_ring->netdev->features & (NETIF_F_FSO | NETIF_F_FCOE_CRC))) {
                tso = ixgbe_fso(tx_ring, first, &hdr_len);
                if (tso < 0)
                        goto out_drop;

                goto xmit_fcoe;
        }

#endif /* IXGBE_FCOE */

#ifdef CONFIG_IXGBE_IPSEC
        if (xfrm_offload(skb) &&
            !ixgbe_ipsec_tx(tx_ring, first, &ipsec_tx))
                goto out_drop;
#endif
        tso = ixgbe_tso(tx_ring, first, &hdr_len, &ipsec_tx);
        if (tso < 0)
                goto out_drop;
        else if (!tso)
                ixgbe_tx_csum(tx_ring, first, &ipsec_tx);

        /* add the ATR filter if ATR is on */
        if (test_bit(__IXGBE_TX_FDIR_INIT_DONE, &tx_ring->state))
                ixgbe_atr(tx_ring, first);

#ifdef IXGBE_FCOE
xmit_fcoe:
#endif /* IXGBE_FCOE */
        if (ixgbe_tx_map(tx_ring, first, hdr_len))
                goto cleanup_tx_timestamp;

        return NETDEV_TX_OK;

out_drop:
        dev_kfree_skb_any(first->skb);
        first->skb = NULL;
cleanup_tx_timestamp:
        if (unlikely(tx_flags & IXGBE_TX_FLAGS_TSTAMP)) {
                dev_kfree_skb_any(adapter->ptp_tx_skb);
                adapter->ptp_tx_skb = NULL;
                cancel_work_sync(&adapter->ptp_tx_work);
                clear_bit_unlock(__IXGBE_PTP_TX_IN_PROGRESS, &adapter->state);
        }

        return NETDEV_TX_OK;
}

static netdev_tx_t __ixgbe_xmit_frame(struct sk_buff *skb,
                                      struct net_device *netdev,
                                      struct ixgbe_ring *ring)
{
        struct ixgbe_adapter *adapter = netdev_priv(netdev);
        struct ixgbe_ring *tx_ring;

        /*
         * The minimum packet size for olinfo paylen is 17 so pad the skb
         * in order to meet this minimum size requirement.
         */
        if (skb_put_padto(skb, 17))
                return NETDEV_TX_OK;

        tx_ring = ring ? ring : adapter->tx_ring[skb_get_queue_mapping(skb)];
        if (unlikely(test_bit(__IXGBE_TX_DISABLED, &tx_ring->state)))
                return NETDEV_TX_BUSY;

        return ixgbe_xmit_frame_ring(skb, adapter, tx_ring);
}

static netdev_tx_t ixgbe_xmit_frame(struct sk_buff *skb,
                                    struct net_device *netdev)
{
        return __ixgbe_xmit_frame(skb, netdev, NULL);
}

/**
 * ixgbe_set_mac - Change the Ethernet Address of the NIC
 * @netdev: network interface device structure
 * @p: pointer to an address structure
 *
 * Returns 0 on success, negative on failure
 **/
static int ixgbe_set_mac(struct net_device *netdev, void *p)
{
        struct ixgbe_adapter *adapter = netdev_priv(netdev);
        struct ixgbe_hw *hw = &adapter->hw;
        struct sockaddr *addr = p;

        if (!is_valid_ether_addr(addr->sa_data))
                return -EADDRNOTAVAIL;

        memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
        memcpy(hw->mac.addr, addr->sa_data, netdev->addr_len);

        ixgbe_mac_set_default_filter(adapter);

        return 0;
}

static int
ixgbe_mdio_read(struct net_device *netdev, int prtad, int devad, u16 addr)
{
        struct ixgbe_adapter *adapter = netdev_priv(netdev);
        struct ixgbe_hw *hw = &adapter->hw;
        u16 value;
        int rc;

        if (adapter->mii_bus) {
                int regnum = addr;

                if (devad != MDIO_DEVAD_NONE)
                        regnum |= (devad << 16) | MII_ADDR_C45;

                return mdiobus_read(adapter->mii_bus, prtad, regnum);
        }

        if (prtad != hw->phy.mdio.prtad)
                return -EINVAL;
        rc = hw->phy.ops.read_reg(hw, addr, devad, &value);
        if (!rc)
                rc = value;
        return rc;
}

static int ixgbe_mdio_write(struct net_device *netdev, int prtad, int devad,
                            u16 addr, u16 value)
{
        struct ixgbe_adapter *adapter = netdev_priv(netdev);
        struct ixgbe_hw *hw = &adapter->hw;

        if (adapter->mii_bus) {
                int regnum = addr;

                if (devad != MDIO_DEVAD_NONE)
                        regnum |= (devad << 16) | MII_ADDR_C45;

                return mdiobus_write(adapter->mii_bus, prtad, regnum, value);
        }

        if (prtad != hw->phy.mdio.prtad)
                return -EINVAL;
        return hw->phy.ops.write_reg(hw, addr, devad, value);
}

static int ixgbe_ioctl(struct net_device *netdev, struct ifreq *req, int cmd)
{
        struct ixgbe_adapter *adapter = netdev_priv(netdev);

        switch (cmd) {
        case SIOCSHWTSTAMP:
                return ixgbe_ptp_set_ts_config(adapter, req);
        case SIOCGHWTSTAMP:
                return ixgbe_ptp_get_ts_config(adapter, req);
        case SIOCGMIIPHY:
                if (!adapter->hw.phy.ops.read_reg)
                        return -EOPNOTSUPP;
                fallthrough;
        default:
                return mdio_mii_ioctl(&adapter->hw.phy.mdio, if_mii(req), cmd);
        }
}

/**
 * ixgbe_add_sanmac_netdev - Add the SAN MAC address to the corresponding
 * netdev->dev_addrs
 * @dev: network interface device structure
 *
 * Returns non-zero on failure
 **/
static int ixgbe_add_sanmac_netdev(struct net_device *dev)
{
        int err = 0;
        struct ixgbe_adapter *adapter = netdev_priv(dev);
        struct ixgbe_hw *hw = &adapter->hw;

        if (is_valid_ether_addr(hw->mac.san_addr)) {
                rtnl_lock();
                err = dev_addr_add(dev, hw->mac.san_addr, NETDEV_HW_ADDR_T_SAN);
                rtnl_unlock();

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

/**
 * ixgbe_del_sanmac_netdev - Removes the SAN MAC address to the corresponding
 * netdev->dev_addrs
 * @dev: network interface device structure
 *
 * Returns non-zero on failure
 **/
static int ixgbe_del_sanmac_netdev(struct net_device *dev)
{
        int err = 0;
        struct ixgbe_adapter *adapter = netdev_priv(dev);
        struct ixgbe_mac_info *mac = &adapter->hw.mac;

        if (is_valid_ether_addr(mac->san_addr)) {
                rtnl_lock();
                err = dev_addr_del(dev, mac->san_addr, NETDEV_HW_ADDR_T_SAN);
                rtnl_unlock();
        }
        return err;
}

static void ixgbe_get_ring_stats64(struct rtnl_link_stats64 *stats,
                                   struct ixgbe_ring *ring)
{
        u64 bytes, packets;
        unsigned int start;

        if (ring) {
                do {
                        start = u64_stats_fetch_begin_irq(&ring->syncp);
                        packets = ring->stats.packets;
                        bytes   = ring->stats.bytes;
                } while (u64_stats_fetch_retry_irq(&ring->syncp, start));
                stats->tx_packets += packets;
                stats->tx_bytes   += bytes;
        }
}

static void ixgbe_get_stats64(struct net_device *netdev,
                              struct rtnl_link_stats64 *stats)
{
        struct ixgbe_adapter *adapter = netdev_priv(netdev);
        int i;

        rcu_read_lock();
        for (i = 0; i < adapter->num_rx_queues; i++) {
                struct ixgbe_ring *ring = READ_ONCE(adapter->rx_ring[i]);
                u64 bytes, packets;
                unsigned int start;

                if (ring) {
                        do {
                                start = u64_stats_fetch_begin_irq(&ring->syncp);
                                packets = ring->stats.packets;
                                bytes   = ring->stats.bytes;
                        } while (u64_stats_fetch_retry_irq(&ring->syncp, start));
                        stats->rx_packets += packets;
                        stats->rx_bytes   += bytes;
                }
        }

        for (i = 0; i < adapter->num_tx_queues; i++) {
                struct ixgbe_ring *ring = READ_ONCE(adapter->tx_ring[i]);

                ixgbe_get_ring_stats64(stats, ring);
        }
        for (i = 0; i < adapter->num_xdp_queues; i++) {
                struct ixgbe_ring *ring = READ_ONCE(adapter->xdp_ring[i]);

                ixgbe_get_ring_stats64(stats, ring);
        }
        rcu_read_unlock();

        /* following stats updated by ixgbe_watchdog_task() */
        stats->multicast        = netdev->stats.multicast;
        stats->rx_errors        = netdev->stats.rx_errors;
        stats->rx_length_errors = netdev->stats.rx_length_errors;
        stats->rx_crc_errors    = netdev->stats.rx_crc_errors;
        stats->rx_missed_errors = netdev->stats.rx_missed_errors;
}

#ifdef CONFIG_IXGBE_DCB
/**
 * ixgbe_validate_rtr - verify 802.1Qp to Rx packet buffer mapping is valid.
 * @adapter: pointer to ixgbe_adapter
 * @tc: number of traffic classes currently enabled
 *
 * Configure a valid 802.1Qp to Rx packet buffer mapping ie confirm
 * 802.1Q priority maps to a packet buffer that exists.
 */
static void ixgbe_validate_rtr(struct ixgbe_adapter *adapter, u8 tc)
{
        struct ixgbe_hw *hw = &adapter->hw;
        u32 reg, rsave;
        int i;

        /* 82598 have a static priority to TC mapping that can not
         * be changed so no validation is needed.
         */
        if (hw->mac.type == ixgbe_mac_82598EB)
                return;

        reg = IXGBE_READ_REG(hw, IXGBE_RTRUP2TC);
        rsave = reg;

        for (i = 0; i < MAX_TRAFFIC_CLASS; i++) {
                u8 up2tc = reg >> (i * IXGBE_RTRUP2TC_UP_SHIFT);

                /* If up2tc is out of bounds default to zero */
                if (up2tc > tc)
                        reg &= ~(0x7 << IXGBE_RTRUP2TC_UP_SHIFT);
        }

        if (reg != rsave)
                IXGBE_WRITE_REG(hw, IXGBE_RTRUP2TC, reg);

        return;
}

/**
 * ixgbe_set_prio_tc_map - Configure netdev prio tc map
 * @adapter: Pointer to adapter struct
 *
 * Populate the netdev user priority to tc map
 */
static void ixgbe_set_prio_tc_map(struct ixgbe_adapter *adapter)
{
        struct net_device *dev = adapter->netdev;
        struct ixgbe_dcb_config *dcb_cfg = &adapter->dcb_cfg;
        struct ieee_ets *ets = adapter->ixgbe_ieee_ets;
        u8 prio;

        for (prio = 0; prio < MAX_USER_PRIORITY; prio++) {
                u8 tc = 0;

                if (adapter->dcbx_cap & DCB_CAP_DCBX_VER_CEE)
                        tc = ixgbe_dcb_get_tc_from_up(dcb_cfg, 0, prio);
                else if (ets)
                        tc = ets->prio_tc[prio];

                netdev_set_prio_tc_map(dev, prio, tc);
        }
}

#endif /* CONFIG_IXGBE_DCB */
static int ixgbe_reassign_macvlan_pool(struct net_device *vdev,
                                       struct netdev_nested_priv *priv)
{
        struct ixgbe_adapter *adapter = (struct ixgbe_adapter *)priv->data;
        struct ixgbe_fwd_adapter *accel;
        int pool;

        /* we only care about macvlans... */
        if (!netif_is_macvlan(vdev))
                return 0;

        /* that have hardware offload enabled... */
        accel = macvlan_accel_priv(vdev);
        if (!accel)
                return 0;

        /* If we can relocate to a different bit do so */
        pool = find_first_zero_bit(adapter->fwd_bitmask, adapter->num_rx_pools);
        if (pool < adapter->num_rx_pools) {
                set_bit(pool, adapter->fwd_bitmask);
                accel->pool = pool;
                return 0;
        }

        /* if we cannot find a free pool then disable the offload */
        netdev_err(vdev, "L2FW offload disabled due to lack of queue resources\n");
        macvlan_release_l2fw_offload(vdev);

        /* unbind the queues and drop the subordinate channel config */
        netdev_unbind_sb_channel(adapter->netdev, vdev);
        netdev_set_sb_channel(vdev, 0);

        kfree(accel);

        return 0;
}

static void ixgbe_defrag_macvlan_pools(struct net_device *dev)
{
        struct ixgbe_adapter *adapter = netdev_priv(dev);
        struct netdev_nested_priv priv = {
                .data = (void *)adapter,
        };

        /* flush any stale bits out of the fwd bitmask */
        bitmap_clear(adapter->fwd_bitmask, 1, 63);

        /* walk through upper devices reassigning pools */
        netdev_walk_all_upper_dev_rcu(dev, ixgbe_reassign_macvlan_pool,
                                      &priv);
}

/**
 * ixgbe_setup_tc - configure net_device for multiple traffic classes
 *
 * @dev: net device to configure
 * @tc: number of traffic classes to enable
 */
int ixgbe_setup_tc(struct net_device *dev, u8 tc)
{
        struct ixgbe_adapter *adapter = netdev_priv(dev);
        struct ixgbe_hw *hw = &adapter->hw;

        /* Hardware supports up to 8 traffic classes */
        if (tc > adapter->dcb_cfg.num_tcs.pg_tcs)
                return -EINVAL;

        if (hw->mac.type == ixgbe_mac_82598EB && tc && tc < MAX_TRAFFIC_CLASS)
                return -EINVAL;

        /* Hardware has to reinitialize queues and interrupts to
         * match packet buffer alignment. Unfortunately, the
         * hardware is not flexible enough to do this dynamically.
         */
        if (netif_running(dev))
                ixgbe_close(dev);
        else
                ixgbe_reset(adapter);

        ixgbe_clear_interrupt_scheme(adapter);

#ifdef CONFIG_IXGBE_DCB
        if (tc) {
                if (adapter->xdp_prog) {
                        e_warn(probe, "DCB is not supported with XDP\n");

                        ixgbe_init_interrupt_scheme(adapter);
                        if (netif_running(dev))
                                ixgbe_open(dev);
                        return -EINVAL;
                }

                netdev_set_num_tc(dev, tc);
                ixgbe_set_prio_tc_map(adapter);

                adapter->hw_tcs = tc;
                adapter->flags |= IXGBE_FLAG_DCB_ENABLED;

                if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
                        adapter->last_lfc_mode = adapter->hw.fc.requested_mode;
                        adapter->hw.fc.requested_mode = ixgbe_fc_none;
                }
        } else {
                netdev_reset_tc(dev);

                if (adapter->hw.mac.type == ixgbe_mac_82598EB)
                        adapter->hw.fc.requested_mode = adapter->last_lfc_mode;

                adapter->flags &= ~IXGBE_FLAG_DCB_ENABLED;
                adapter->hw_tcs = tc;

                adapter->temp_dcb_cfg.pfc_mode_enable = false;
                adapter->dcb_cfg.pfc_mode_enable = false;
        }

        ixgbe_validate_rtr(adapter, tc);

#endif /* CONFIG_IXGBE_DCB */
        ixgbe_init_interrupt_scheme(adapter);

        ixgbe_defrag_macvlan_pools(dev);

        if (netif_running(dev))
                return ixgbe_open(dev);

        return 0;
}

static int ixgbe_delete_clsu32(struct ixgbe_adapter *adapter,
                               struct tc_cls_u32_offload *cls)
{
        u32 hdl = cls->knode.handle;
        u32 uhtid = TC_U32_USERHTID(cls->knode.handle);
        u32 loc = cls->knode.handle & 0xfffff;
        int err = 0, i, j;
        struct ixgbe_jump_table *jump = NULL;

        if (loc > IXGBE_MAX_HW_ENTRIES)
                return -EINVAL;

        if ((uhtid != 0x800) && (uhtid >= IXGBE_MAX_LINK_HANDLE))
                return -EINVAL;

        /* Clear this filter in the link data it is associated with */
        if (uhtid != 0x800) {
                jump = adapter->jump_tables[uhtid];
                if (!jump)
                        return -EINVAL;
                if (!test_bit(loc - 1, jump->child_loc_map))
                        return -EINVAL;
                clear_bit(loc - 1, jump->child_loc_map);
        }

        /* Check if the filter being deleted is a link */
        for (i = 1; i < IXGBE_MAX_LINK_HANDLE; i++) {
                jump = adapter->jump_tables[i];
                if (jump && jump->link_hdl == hdl) {
                        /* Delete filters in the hardware in the child hash
                         * table associated with this link
                         */
                        for (j = 0; j < IXGBE_MAX_HW_ENTRIES; j++) {
                                if (!test_bit(j, jump->child_loc_map))
                                        continue;
                                spin_lock(&adapter->fdir_perfect_lock);
                                err = ixgbe_update_ethtool_fdir_entry(adapter,
                                                                      NULL,
                                                                      j + 1);
                                spin_unlock(&adapter->fdir_perfect_lock);
                                clear_bit(j, jump->child_loc_map);
                        }
                        /* Remove resources for this link */
                        kfree(jump->input);
                        kfree(jump->mask);
                        kfree(jump);
                        adapter->jump_tables[i] = NULL;
                        return err;
                }
        }

        spin_lock(&adapter->fdir_perfect_lock);
        err = ixgbe_update_ethtool_fdir_entry(adapter, NULL, loc);
        spin_unlock(&adapter->fdir_perfect_lock);
        return err;
}

static int ixgbe_configure_clsu32_add_hnode(struct ixgbe_adapter *adapter,
                                            struct tc_cls_u32_offload *cls)
{
        u32 uhtid = TC_U32_USERHTID(cls->hnode.handle);

        if (uhtid >= IXGBE_MAX_LINK_HANDLE)
                return -EINVAL;

        /* This ixgbe devices do not support hash tables at the moment
         * so abort when given hash tables.
         */
        if (cls->hnode.divisor > 0)
                return -EINVAL;

        set_bit(uhtid - 1, &adapter->tables);
        return 0;
}

static int ixgbe_configure_clsu32_del_hnode(struct ixgbe_adapter *adapter,
                                            struct tc_cls_u32_offload *cls)
{
        u32 uhtid = TC_U32_USERHTID(cls->hnode.handle);

        if (uhtid >= IXGBE_MAX_LINK_HANDLE)
                return -EINVAL;

        clear_bit(uhtid - 1, &adapter->tables);
        return 0;
}

#ifdef CONFIG_NET_CLS_ACT
struct upper_walk_data {
        struct ixgbe_adapter *adapter;
        u64 action;
        int ifindex;
        u8 queue;
};

static int get_macvlan_queue(struct net_device *upper,
                             struct netdev_nested_priv *priv)
{
        if (netif_is_macvlan(upper)) {
                struct ixgbe_fwd_adapter *vadapter = macvlan_accel_priv(upper);
                struct ixgbe_adapter *adapter;
                struct upper_walk_data *data;
                int ifindex;

                data = (struct upper_walk_data *)priv->data;
                ifindex = data->ifindex;
                adapter = data->adapter;
                if (vadapter && upper->ifindex == ifindex) {
                        data->queue = adapter->rx_ring[vadapter->rx_base_queue]->reg_idx;
                        data->action = data->queue;
                        return 1;
                }
        }

        return 0;
}

static int handle_redirect_action(struct ixgbe_adapter *adapter, int ifindex,
                                  u8 *queue, u64 *action)
{
        struct ixgbe_ring_feature *vmdq = &adapter->ring_feature[RING_F_VMDQ];
        unsigned int num_vfs = adapter->num_vfs, vf;
        struct netdev_nested_priv priv;
        struct upper_walk_data data;
        struct net_device *upper;

        /* redirect to a SRIOV VF */
        for (vf = 0; vf < num_vfs; ++vf) {
                upper = pci_get_drvdata(adapter->vfinfo[vf].vfdev);
                if (upper->ifindex == ifindex) {
                        *queue = vf * __ALIGN_MASK(1, ~vmdq->mask);
                        *action = vf + 1;
                        *action <<= ETHTOOL_RX_FLOW_SPEC_RING_VF_OFF;
                        return 0;
                }
        }

        /* redirect to a offloaded macvlan netdev */
        data.adapter = adapter;
        data.ifindex = ifindex;
        data.action = 0;
        data.queue = 0;
        priv.data = (void *)&data;
        if (netdev_walk_all_upper_dev_rcu(adapter->netdev,
                                          get_macvlan_queue, &priv)) {
                *action = data.action;
                *queue = data.queue;

                return 0;
        }

        return -EINVAL;
}

static int parse_tc_actions(struct ixgbe_adapter *adapter,
                            struct tcf_exts *exts, u64 *action, u8 *queue)
{
        const struct tc_action *a;
        int i;

        if (!tcf_exts_has_actions(exts))
                return -EINVAL;

        tcf_exts_for_each_action(i, a, exts) {
                /* Drop action */
                if (is_tcf_gact_shot(a)) {
                        *action = IXGBE_FDIR_DROP_QUEUE;
                        *queue = IXGBE_FDIR_DROP_QUEUE;
                        return 0;
                }

                /* Redirect to a VF or a offloaded macvlan */
                if (is_tcf_mirred_egress_redirect(a)) {
                        struct net_device *dev = tcf_mirred_dev(a);

                        if (!dev)
                                return -EINVAL;
                        return handle_redirect_action(adapter, dev->ifindex,
                                                      queue, action);
                }

                return -EINVAL;
        }

        return -EINVAL;
}
#else
static int parse_tc_actions(struct ixgbe_adapter *adapter,
                            struct tcf_exts *exts, u64 *action, u8 *queue)
{
        return -EINVAL;
}
#endif /* CONFIG_NET_CLS_ACT */

static int ixgbe_clsu32_build_input(struct ixgbe_fdir_filter *input,
                                    union ixgbe_atr_input *mask,
                                    struct tc_cls_u32_offload *cls,
                                    struct ixgbe_mat_field *field_ptr,
                                    struct ixgbe_nexthdr *nexthdr)
{
        int i, j, off;
        __be32 val, m;
        bool found_entry = false, found_jump_field = false;

        for (i = 0; i < cls->knode.sel->nkeys; i++) {
                off = cls->knode.sel->keys[i].off;
                val = cls->knode.sel->keys[i].val;
                m = cls->knode.sel->keys[i].mask;

                for (j = 0; field_ptr[j].val; j++) {
                        if (field_ptr[j].off == off) {
                                field_ptr[j].val(input, mask, (__force u32)val,
                                                 (__force u32)m);
                                input->filter.formatted.flow_type |=
                                        field_ptr[j].type;
                                found_entry = true;
                                break;
                        }
                }
                if (nexthdr) {
                        if (nexthdr->off == cls->knode.sel->keys[i].off &&
                            nexthdr->val ==
                            (__force u32)cls->knode.sel->keys[i].val &&
                            nexthdr->mask ==
                            (__force u32)cls->knode.sel->keys[i].mask)
                                found_jump_field = true;
                        else
                                continue;
                }
        }

        if (nexthdr && !found_jump_field)
                return -EINVAL;

        if (!found_entry)
                return 0;

        mask->formatted.flow_type = IXGBE_ATR_L4TYPE_IPV6_MASK |
                                    IXGBE_ATR_L4TYPE_MASK;

        if (input->filter.formatted.flow_type == IXGBE_ATR_FLOW_TYPE_IPV4)
                mask->formatted.flow_type &= IXGBE_ATR_L4TYPE_IPV6_MASK;

        return 0;
}

static int ixgbe_configure_clsu32(struct ixgbe_adapter *adapter,
                                  struct tc_cls_u32_offload *cls)
{
        __be16 protocol = cls->common.protocol;
        u32 loc = cls->knode.handle & 0xfffff;
        struct ixgbe_hw *hw = &adapter->hw;
        struct ixgbe_mat_field *field_ptr;
        struct ixgbe_fdir_filter *input = NULL;
        union ixgbe_atr_input *mask = NULL;
        struct ixgbe_jump_table *jump = NULL;
        int i, err = -EINVAL;
        u8 queue;
        u32 uhtid, link_uhtid;

        uhtid = TC_U32_USERHTID(cls->knode.handle);
        link_uhtid = TC_U32_USERHTID(cls->knode.link_handle);

        /* At the moment cls_u32 jumps to network layer and skips past
         * L2 headers. The canonical method to match L2 frames is to use
         * negative values. However this is error prone at best but really
         * just broken because there is no way to "know" what sort of hdr
         * is in front of the network layer. Fix cls_u32 to support L2
         * headers when needed.
         */
        if (protocol != htons(ETH_P_IP))
                return err;

        if (loc >= ((1024 << adapter->fdir_pballoc) - 2)) {
                e_err(drv, "Location out of range\n");
                return err;
        }

        /* cls u32 is a graph starting at root node 0x800. The driver tracks
         * links and also the fields used to advance the parser across each
         * link (e.g. nexthdr/eat parameters from 'tc'). This way we can map
         * the u32 graph onto the hardware parse graph denoted in ixgbe_model.h
         * To add support for new nodes update ixgbe_model.h parse structures
         * this function _should_ be generic try not to hardcode values here.
         */
        if (uhtid == 0x800) {
                field_ptr = (adapter->jump_tables[0])->mat;
        } else {
                if (uhtid >= IXGBE_MAX_LINK_HANDLE)
                        return err;
                if (!adapter->jump_tables[uhtid])
                        return err;
                field_ptr = (adapter->jump_tables[uhtid])->mat;
        }

        if (!field_ptr)
                return err;

        /* At this point we know the field_ptr is valid and need to either
         * build cls_u32 link or attach filter. Because adding a link to
         * a handle that does not exist is invalid and the same for adding
         * rules to handles that don't exist.
         */

        if (link_uhtid) {
                struct ixgbe_nexthdr *nexthdr = ixgbe_ipv4_jumps;

                if (link_uhtid >= IXGBE_MAX_LINK_HANDLE)
                        return err;

                if (!test_bit(link_uhtid - 1, &adapter->tables))
                        return err;

                /* Multiple filters as links to the same hash table are not
                 * supported. To add a new filter with the same next header
                 * but different match/jump conditions, create a new hash table
                 * and link to it.
                 */
                if (adapter->jump_tables[link_uhtid] &&
                    (adapter->jump_tables[link_uhtid])->link_hdl) {
                        e_err(drv, "Link filter exists for link: %x\n",
                              link_uhtid);
                        return err;
                }

                for (i = 0; nexthdr[i].jump; i++) {
                        if (nexthdr[i].o != cls->knode.sel->offoff ||
                            nexthdr[i].s != cls->knode.sel->offshift ||
                            nexthdr[i].m !=
                            (__force u32)cls->knode.sel->offmask)
                                return err;

                        jump = kzalloc(sizeof(*jump), GFP_KERNEL);
                        if (!jump)
                                return -ENOMEM;
                        input = kzalloc(sizeof(*input), GFP_KERNEL);
                        if (!input) {
                                err = -ENOMEM;
                                goto free_jump;
                        }
                        mask = kzalloc(sizeof(*mask), GFP_KERNEL);
                        if (!mask) {
                                err = -ENOMEM;
                                goto free_input;
                        }
                        jump->input = input;
                        jump->mask = mask;
                        jump->link_hdl = cls->knode.handle;

                        err = ixgbe_clsu32_build_input(input, mask, cls,
                                                       field_ptr, &nexthdr[i]);
                        if (!err) {
                                jump->mat = nexthdr[i].jump;
                                adapter->jump_tables[link_uhtid] = jump;
                                break;
                        } else {
                                kfree(mask);
                                kfree(input);
                                kfree(jump);
                        }
                }
                return 0;
        }

        input = kzalloc(sizeof(*input), GFP_KERNEL);
        if (!input)
                return -ENOMEM;
        mask = kzalloc(sizeof(*mask), GFP_KERNEL);
        if (!mask) {
                err = -ENOMEM;
                goto free_input;
        }

        if ((uhtid != 0x800) && (adapter->jump_tables[uhtid])) {
                if ((adapter->jump_tables[uhtid])->input)
                        memcpy(input, (adapter->jump_tables[uhtid])->input,
                               sizeof(*input));
                if ((adapter->jump_tables[uhtid])->mask)
                        memcpy(mask, (adapter->jump_tables[uhtid])->mask,
                               sizeof(*mask));

                /* Lookup in all child hash tables if this location is already
                 * filled with a filter
                 */
                for (i = 1; i < IXGBE_MAX_LINK_HANDLE; i++) {
                        struct ixgbe_jump_table *link = adapter->jump_tables[i];

                        if (link && (test_bit(loc - 1, link->child_loc_map))) {
                                e_err(drv, "Filter exists in location: %x\n",
                                      loc);
                                err = -EINVAL;
                                goto err_out;
                        }
                }
        }
        err = ixgbe_clsu32_build_input(input, mask, cls, field_ptr, NULL);
        if (err)
                goto err_out;

        err = parse_tc_actions(adapter, cls->knode.exts, &input->action,
                               &queue);
        if (err < 0)
                goto err_out;

        input->sw_idx = loc;

        spin_lock(&adapter->fdir_perfect_lock);

        if (hlist_empty(&adapter->fdir_filter_list)) {
                memcpy(&adapter->fdir_mask, mask, sizeof(*mask));
                err = ixgbe_fdir_set_input_mask_82599(hw, mask);
                if (err)
                        goto err_out_w_lock;
        } else if (memcmp(&adapter->fdir_mask, mask, sizeof(*mask))) {
                err = -EINVAL;
                goto err_out_w_lock;
        }

        ixgbe_atr_compute_perfect_hash_82599(&input->filter, mask);
        err = ixgbe_fdir_write_perfect_filter_82599(hw, &input->filter,
                                                    input->sw_idx, queue);
        if (err)
                goto err_out_w_lock;

        ixgbe_update_ethtool_fdir_entry(adapter, input, input->sw_idx);
        spin_unlock(&adapter->fdir_perfect_lock);

        if ((uhtid != 0x800) && (adapter->jump_tables[uhtid]))
                set_bit(loc - 1, (adapter->jump_tables[uhtid])->child_loc_map);

        kfree(mask);
        return err;
err_out_w_lock:
        spin_unlock(&adapter->fdir_perfect_lock);
err_out:
        kfree(mask);
free_input:
        kfree(input);
free_jump:
        kfree(jump);
        return err;
}

static int ixgbe_setup_tc_cls_u32(struct ixgbe_adapter *adapter,
                                  struct tc_cls_u32_offload *cls_u32)
{
        switch (cls_u32->command) {
        case TC_CLSU32_NEW_KNODE:
        case TC_CLSU32_REPLACE_KNODE:
                return ixgbe_configure_clsu32(adapter, cls_u32);
        case TC_CLSU32_DELETE_KNODE:
                return ixgbe_delete_clsu32(adapter, cls_u32);
        case TC_CLSU32_NEW_HNODE:
        case TC_CLSU32_REPLACE_HNODE:
                return ixgbe_configure_clsu32_add_hnode(adapter, cls_u32);
        case TC_CLSU32_DELETE_HNODE:
                return ixgbe_configure_clsu32_del_hnode(adapter, cls_u32);
        default:
                return -EOPNOTSUPP;
        }
}

static int ixgbe_setup_tc_block_cb(enum tc_setup_type type, void *type_data,
                                   void *cb_priv)
{
        struct ixgbe_adapter *adapter = cb_priv;

        if (!tc_cls_can_offload_and_chain0(adapter->netdev, type_data))
                return -EOPNOTSUPP;

        switch (type) {
        case TC_SETUP_CLSU32:
                return ixgbe_setup_tc_cls_u32(adapter, type_data);
        default:
                return -EOPNOTSUPP;
        }
}

static int ixgbe_setup_tc_mqprio(struct net_device *dev,
                                 struct tc_mqprio_qopt *mqprio)
{
        mqprio->hw = TC_MQPRIO_HW_OFFLOAD_TCS;
        return ixgbe_setup_tc(dev, mqprio->num_tc);
}

static LIST_HEAD(ixgbe_block_cb_list);

static int __ixgbe_setup_tc(struct net_device *dev, enum tc_setup_type type,
                            void *type_data)
{
        struct ixgbe_adapter *adapter = netdev_priv(dev);

        switch (type) {
        case TC_SETUP_BLOCK:
                return flow_block_cb_setup_simple(type_data,
                                                  &ixgbe_block_cb_list,
                                                  ixgbe_setup_tc_block_cb,
                                                  adapter, adapter, true);
        case TC_SETUP_QDISC_MQPRIO:
                return ixgbe_setup_tc_mqprio(dev, type_data);
        default:
                return -EOPNOTSUPP;
        }
}

#ifdef CONFIG_PCI_IOV
void ixgbe_sriov_reinit(struct ixgbe_adapter *adapter)
{
        struct net_device *netdev = adapter->netdev;

        rtnl_lock();
        ixgbe_setup_tc(netdev, adapter->hw_tcs);
        rtnl_unlock();
}

#endif
void ixgbe_do_reset(struct net_device *netdev)
{
        struct ixgbe_adapter *adapter = netdev_priv(netdev);

        if (netif_running(netdev))
                ixgbe_reinit_locked(adapter);
        else
                ixgbe_reset(adapter);
}

static netdev_features_t ixgbe_fix_features(struct net_device *netdev,
                                            netdev_features_t features)
{
        struct ixgbe_adapter *adapter = netdev_priv(netdev);

        /* If Rx checksum is disabled, then RSC/LRO should also be disabled */
        if (!(features & NETIF_F_RXCSUM))
                features &= ~NETIF_F_LRO;

        /* Turn off LRO if not RSC capable */
        if (!(adapter->flags2 & IXGBE_FLAG2_RSC_CAPABLE))
                features &= ~NETIF_F_LRO;

        if (adapter->xdp_prog && (features & NETIF_F_LRO)) {
                e_dev_err("LRO is not supported with XDP\n");
                features &= ~NETIF_F_LRO;
        }

        return features;
}

static void ixgbe_reset_l2fw_offload(struct ixgbe_adapter *adapter)
{
        int rss = min_t(int, ixgbe_max_rss_indices(adapter),
                        num_online_cpus());

        /* go back to full RSS if we're not running SR-IOV */
        if (!adapter->ring_feature[RING_F_VMDQ].offset)
                adapter->flags &= ~(IXGBE_FLAG_VMDQ_ENABLED |
                                    IXGBE_FLAG_SRIOV_ENABLED);

        adapter->ring_feature[RING_F_RSS].limit = rss;
        adapter->ring_feature[RING_F_VMDQ].limit = 1;

        ixgbe_setup_tc(adapter->netdev, adapter->hw_tcs);
}

static int ixgbe_set_features(struct net_device *netdev,
                              netdev_features_t features)
{
        struct ixgbe_adapter *adapter = netdev_priv(netdev);
        netdev_features_t changed = netdev->features ^ features;
        bool need_reset = false;

        /* Make sure RSC matches LRO, reset if change */
        if (!(features & NETIF_F_LRO)) {
                if (adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED)
                        need_reset = true;
                adapter->flags2 &= ~IXGBE_FLAG2_RSC_ENABLED;
        } else if ((adapter->flags2 & IXGBE_FLAG2_RSC_CAPABLE) &&
                   !(adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED)) {
                if (adapter->rx_itr_setting == 1 ||
                    adapter->rx_itr_setting > IXGBE_MIN_RSC_ITR) {
                        adapter->flags2 |= IXGBE_FLAG2_RSC_ENABLED;
                        need_reset = true;
                } else if ((changed ^ features) & NETIF_F_LRO) {
                        e_info(probe, "rx-usecs set too low, "
                               "disabling RSC\n");
                }
        }

        /*
         * Check if Flow Director n-tuple support or hw_tc support was
         * enabled or disabled.  If the state changed, we need to reset.
         */
        if ((features & NETIF_F_NTUPLE) || (features & NETIF_F_HW_TC)) {
                /* turn off ATR, enable perfect filters and reset */
                if (!(adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE))
                        need_reset = true;

                adapter->flags &= ~IXGBE_FLAG_FDIR_HASH_CAPABLE;
                adapter->flags |= IXGBE_FLAG_FDIR_PERFECT_CAPABLE;
        } else {
                /* turn off perfect filters, enable ATR and reset */
                if (adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE)
                        need_reset = true;

                adapter->flags &= ~IXGBE_FLAG_FDIR_PERFECT_CAPABLE;

                /* We cannot enable ATR if SR-IOV is enabled */
                if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED ||
                    /* We cannot enable ATR if we have 2 or more tcs */
                    (adapter->hw_tcs > 1) ||
                    /* We cannot enable ATR if RSS is disabled */
                    (adapter->ring_feature[RING_F_RSS].limit <= 1) ||
                    /* A sample rate of 0 indicates ATR disabled */
                    (!adapter->atr_sample_rate))
                        ; /* do nothing not supported */
                else /* otherwise supported and set the flag */
                        adapter->flags |= IXGBE_FLAG_FDIR_HASH_CAPABLE;
        }

        if (changed & NETIF_F_RXALL)
                need_reset = true;

        netdev->features = features;

        if ((changed & NETIF_F_HW_L2FW_DOFFLOAD) && adapter->num_rx_pools > 1)
                ixgbe_reset_l2fw_offload(adapter);
        else if (need_reset)
                ixgbe_do_reset(netdev);
        else if (changed & (NETIF_F_HW_VLAN_CTAG_RX |
                            NETIF_F_HW_VLAN_CTAG_FILTER))
                ixgbe_set_rx_mode(netdev);

        return 1;
}

static int ixgbe_ndo_fdb_add(struct ndmsg *ndm, struct nlattr *tb[],
                             struct net_device *dev,
                             const unsigned char *addr, u16 vid,
                             u16 flags,
                             struct netlink_ext_ack *extack)
{
        /* guarantee we can provide a unique filter for the unicast address */
        if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr)) {
                struct ixgbe_adapter *adapter = netdev_priv(dev);
                u16 pool = VMDQ_P(0);

                if (netdev_uc_count(dev) >= ixgbe_available_rars(adapter, pool))
                        return -ENOMEM;
        }

        return ndo_dflt_fdb_add(ndm, tb, dev, addr, vid, flags);
}

/**
 * ixgbe_configure_bridge_mode - set various bridge modes
 * @adapter: the private structure
 * @mode: requested bridge mode
 *
 * Configure some settings require for various bridge modes.
 **/
static int ixgbe_configure_bridge_mode(struct ixgbe_adapter *adapter,
                                       __u16 mode)
{
        struct ixgbe_hw *hw = &adapter->hw;
        unsigned int p, num_pools;
        u32 vmdctl;

        switch (mode) {
        case BRIDGE_MODE_VEPA:
                /* disable Tx loopback, rely on switch hairpin mode */
                IXGBE_WRITE_REG(&adapter->hw, IXGBE_PFDTXGSWC, 0);

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

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

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

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

        adapter->bridge_mode = mode;

        e_info(drv, "enabling bridge mode: %s\n",
               mode == BRIDGE_MODE_VEPA ? "VEPA" : "VEB");

        return 0;
}

static int ixgbe_ndo_bridge_setlink(struct net_device *dev,
                                    struct nlmsghdr *nlh, u16 flags,
                                    struct netlink_ext_ack *extack)
{
        struct ixgbe_adapter *adapter = netdev_priv(dev);
        struct nlattr *attr, *br_spec;
        int rem;

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

        br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
        if (!br_spec)
                return -EINVAL;

        nla_for_each_nested(attr, br_spec, rem) {
                int status;
                __u16 mode;

                if (nla_type(attr) != IFLA_BRIDGE_MODE)
                        continue;

                if (nla_len(attr) < sizeof(mode))
                        return -EINVAL;

                mode = nla_get_u16(attr);
                status = ixgbe_configure_bridge_mode(adapter, mode);
                if (status)
                        return status;

                break;
        }

        return 0;
}

static int ixgbe_ndo_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
                                    struct net_device *dev,
                                    u32 filter_mask, int nlflags)
{
        struct ixgbe_adapter *adapter = netdev_priv(dev);

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

        return ndo_dflt_bridge_getlink(skb, pid, seq, dev,
                                       adapter->bridge_mode, 0, 0, nlflags,
                                       filter_mask, NULL);
}

static void *ixgbe_fwd_add(struct net_device *pdev, struct net_device *vdev)
{
        struct ixgbe_adapter *adapter = netdev_priv(pdev);
        struct ixgbe_fwd_adapter *accel;
        int tcs = adapter->hw_tcs ? : 1;
        int pool, err;

        if (adapter->xdp_prog) {
                e_warn(probe, "L2FW offload is not supported with XDP\n");
                return ERR_PTR(-EINVAL);
        }

        /* The hardware supported by ixgbe only filters on the destination MAC
         * address. In order to avoid issues we only support offloading modes
         * where the hardware can actually provide the functionality.
         */
        if (!macvlan_supports_dest_filter(vdev))
                return ERR_PTR(-EMEDIUMTYPE);

        /* We need to lock down the macvlan to be a single queue device so that
         * we can reuse the tc_to_txq field in the macvlan netdev to represent
         * the queue mapping to our netdev.
         */
        if (netif_is_multiqueue(vdev))
                return ERR_PTR(-ERANGE);

        pool = find_first_zero_bit(adapter->fwd_bitmask, adapter->num_rx_pools);
        if (pool == adapter->num_rx_pools) {
                u16 used_pools = adapter->num_vfs + adapter->num_rx_pools;
                u16 reserved_pools;

                if (((adapter->flags & IXGBE_FLAG_DCB_ENABLED) &&
                     adapter->num_rx_pools >= (MAX_TX_QUEUES / tcs)) ||
                    adapter->num_rx_pools > IXGBE_MAX_MACVLANS)
                        return ERR_PTR(-EBUSY);

                /* Hardware has a limited number of available pools. Each VF,
                 * and the PF require a pool. Check to ensure we don't
                 * attempt to use more then the available number of pools.
                 */
                if (used_pools >= IXGBE_MAX_VF_FUNCTIONS)
                        return ERR_PTR(-EBUSY);

                /* Enable VMDq flag so device will be set in VM mode */
                adapter->flags |= IXGBE_FLAG_VMDQ_ENABLED |
                                  IXGBE_FLAG_SRIOV_ENABLED;

                /* Try to reserve as many queues per pool as possible,
                 * we start with the configurations that support 4 queues
                 * per pools, followed by 2, and then by just 1 per pool.
                 */
                if (used_pools < 32 && adapter->num_rx_pools < 16)
                        reserved_pools = min_t(u16,
                                               32 - used_pools,
                                               16 - adapter->num_rx_pools);
                else if (adapter->num_rx_pools < 32)
                        reserved_pools = min_t(u16,
                                               64 - used_pools,
                                               32 - adapter->num_rx_pools);
                else
                        reserved_pools = 64 - used_pools;


                if (!reserved_pools)
                        return ERR_PTR(-EBUSY);

                adapter->ring_feature[RING_F_VMDQ].limit += reserved_pools;

                /* Force reinit of ring allocation with VMDQ enabled */
                err = ixgbe_setup_tc(pdev, adapter->hw_tcs);
                if (err)
                        return ERR_PTR(err);

                if (pool >= adapter->num_rx_pools)
                        return ERR_PTR(-ENOMEM);
        }

        accel = kzalloc(sizeof(*accel), GFP_KERNEL);
        if (!accel)
                return ERR_PTR(-ENOMEM);

        set_bit(pool, adapter->fwd_bitmask);
        netdev_set_sb_channel(vdev, pool);
        accel->pool = pool;
        accel->netdev = vdev;

        if (!netif_running(pdev))
                return accel;

        err = ixgbe_fwd_ring_up(adapter, accel);
        if (err)
                return ERR_PTR(err);

        return accel;
}

static void ixgbe_fwd_del(struct net_device *pdev, void *priv)
{
        struct ixgbe_fwd_adapter *accel = priv;
        struct ixgbe_adapter *adapter = netdev_priv(pdev);
        unsigned int rxbase = accel->rx_base_queue;
        unsigned int i;

        /* delete unicast filter associated with offloaded interface */
        ixgbe_del_mac_filter(adapter, accel->netdev->dev_addr,
                             VMDQ_P(accel->pool));

        /* Allow remaining Rx packets to get flushed out of the
         * Rx FIFO before we drop the netdev for the ring.
         */
        usleep_range(10000, 20000);

        for (i = 0; i < adapter->num_rx_queues_per_pool; i++) {
                struct ixgbe_ring *ring = adapter->rx_ring[rxbase + i];
                struct ixgbe_q_vector *qv = ring->q_vector;

                /* Make sure we aren't processing any packets and clear
                 * netdev to shut down the ring.
                 */
                if (netif_running(adapter->netdev))
                        napi_synchronize(&qv->napi);
                ring->netdev = NULL;
        }

        /* unbind the queues and drop the subordinate channel config */
        netdev_unbind_sb_channel(pdev, accel->netdev);
        netdev_set_sb_channel(accel->netdev, 0);

        clear_bit(accel->pool, adapter->fwd_bitmask);
        kfree(accel);
}

#define IXGBE_MAX_MAC_HDR_LEN           127
#define IXGBE_MAX_NETWORK_HDR_LEN       511

static netdev_features_t
ixgbe_features_check(struct sk_buff *skb, struct net_device *dev,
                     netdev_features_t features)
{
        unsigned int network_hdr_len, mac_hdr_len;

        /* Make certain the headers can be described by a context descriptor */
        mac_hdr_len = skb_network_header(skb) - skb->data;
        if (unlikely(mac_hdr_len > IXGBE_MAX_MAC_HDR_LEN))
                return features & ~(NETIF_F_HW_CSUM |
                                    NETIF_F_SCTP_CRC |
                                    NETIF_F_GSO_UDP_L4 |
                                    NETIF_F_HW_VLAN_CTAG_TX |
                                    NETIF_F_TSO |
                                    NETIF_F_TSO6);

        network_hdr_len = skb_checksum_start(skb) - skb_network_header(skb);
        if (unlikely(network_hdr_len >  IXGBE_MAX_NETWORK_HDR_LEN))
                return features & ~(NETIF_F_HW_CSUM |
                                    NETIF_F_SCTP_CRC |
                                    NETIF_F_GSO_UDP_L4 |
                                    NETIF_F_TSO |
                                    NETIF_F_TSO6);

        /* We can only support IPV4 TSO in tunnels if we can mangle the
         * inner IP ID field, so strip TSO if MANGLEID is not supported.
         * IPsec offoad sets skb->encapsulation but still can handle
         * the TSO, so it's the exception.
         */
        if (skb->encapsulation && !(features & NETIF_F_TSO_MANGLEID)) {
#ifdef CONFIG_IXGBE_IPSEC
                if (!secpath_exists(skb))
#endif
                        features &= ~NETIF_F_TSO;
        }

        return features;
}

static int ixgbe_xdp_setup(struct net_device *dev, struct bpf_prog *prog)
{
        int i, frame_size = dev->mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN;
        struct ixgbe_adapter *adapter = netdev_priv(dev);
        struct bpf_prog *old_prog;
        bool need_reset;

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

        if (adapter->flags & IXGBE_FLAG_DCB_ENABLED)
                return -EINVAL;

        /* verify ixgbe ring attributes are sufficient for XDP */
        for (i = 0; i < adapter->num_rx_queues; i++) {
                struct ixgbe_ring *ring = adapter->rx_ring[i];

                if (ring_is_rsc_enabled(ring))
                        return -EINVAL;

                if (frame_size > ixgbe_rx_bufsz(ring))
                        return -EINVAL;
        }

        if (nr_cpu_ids > MAX_XDP_QUEUES)
                return -ENOMEM;

        old_prog = xchg(&adapter->xdp_prog, prog);
        need_reset = (!!prog != !!old_prog);

        /* If transitioning XDP modes reconfigure rings */
        if (need_reset) {
                int err;

                if (!prog)
                        /* Wait until ndo_xsk_wakeup completes. */
                        synchronize_rcu();
                err = ixgbe_setup_tc(dev, adapter->hw_tcs);

                if (err) {
                        rcu_assign_pointer(adapter->xdp_prog, old_prog);
                        return -EINVAL;
                }
        } else {
                for (i = 0; i < adapter->num_rx_queues; i++)
                        (void)xchg(&adapter->rx_ring[i]->xdp_prog,
                            adapter->xdp_prog);
        }

        if (old_prog)
                bpf_prog_put(old_prog);

        /* Kick start the NAPI context if there is an AF_XDP socket open
         * on that queue id. This so that receiving will start.
         */
        if (need_reset && prog)
                for (i = 0; i < adapter->num_rx_queues; i++)
                        if (adapter->xdp_ring[i]->xsk_pool)
                                (void)ixgbe_xsk_wakeup(adapter->netdev, i,
                                                       XDP_WAKEUP_RX);

        return 0;
}

static int ixgbe_xdp(struct net_device *dev, struct netdev_bpf *xdp)
{
        struct ixgbe_adapter *adapter = netdev_priv(dev);

        switch (xdp->command) {
        case XDP_SETUP_PROG:
                return ixgbe_xdp_setup(dev, xdp->prog);
        case XDP_SETUP_XSK_POOL:
                return ixgbe_xsk_pool_setup(adapter, xdp->xsk.pool,
                                            xdp->xsk.queue_id);

        default:
                return -EINVAL;
        }
}

void ixgbe_xdp_ring_update_tail(struct ixgbe_ring *ring)
{
        /* Force memory writes to complete before letting h/w know there
         * are new descriptors to fetch.
         */
        wmb();
        writel(ring->next_to_use, ring->tail);
}

static int ixgbe_xdp_xmit(struct net_device *dev, int n,
                          struct xdp_frame **frames, u32 flags)
{
        struct ixgbe_adapter *adapter = netdev_priv(dev);
        struct ixgbe_ring *ring;
        int nxmit = 0;
        int i;

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

        if (unlikely(flags & ~XDP_XMIT_FLAGS_MASK))
                return -EINVAL;

        /* During program transitions its possible adapter->xdp_prog is assigned
         * but ring has not been configured yet. In this case simply abort xmit.
         */
        ring = adapter->xdp_prog ? adapter->xdp_ring[smp_processor_id()] : NULL;
        if (unlikely(!ring))
                return -ENXIO;

        if (unlikely(test_bit(__IXGBE_TX_DISABLED, &ring->state)))
                return -ENXIO;

        for (i = 0; i < n; i++) {
                struct xdp_frame *xdpf = frames[i];
                int err;

                err = ixgbe_xmit_xdp_ring(adapter, xdpf);
                if (err != IXGBE_XDP_TX)
                        break;
                nxmit++;
        }

        if (unlikely(flags & XDP_XMIT_FLUSH))
                ixgbe_xdp_ring_update_tail(ring);

        return nxmit;
}

static const struct net_device_ops ixgbe_netdev_ops = {
        .ndo_open               = ixgbe_open,
        .ndo_stop               = ixgbe_close,
        .ndo_start_xmit         = ixgbe_xmit_frame,
        .ndo_set_rx_mode        = ixgbe_set_rx_mode,
        .ndo_validate_addr      = eth_validate_addr,
        .ndo_set_mac_address    = ixgbe_set_mac,
        .ndo_change_mtu         = ixgbe_change_mtu,
        .ndo_tx_timeout         = ixgbe_tx_timeout,
        .ndo_set_tx_maxrate     = ixgbe_tx_maxrate,
        .ndo_vlan_rx_add_vid    = ixgbe_vlan_rx_add_vid,
        .ndo_vlan_rx_kill_vid   = ixgbe_vlan_rx_kill_vid,
        .ndo_eth_ioctl          = ixgbe_ioctl,
        .ndo_set_vf_mac         = ixgbe_ndo_set_vf_mac,
        .ndo_set_vf_vlan        = ixgbe_ndo_set_vf_vlan,
        .ndo_set_vf_rate        = ixgbe_ndo_set_vf_bw,
        .ndo_set_vf_spoofchk    = ixgbe_ndo_set_vf_spoofchk,
        .ndo_set_vf_rss_query_en = ixgbe_ndo_set_vf_rss_query_en,
        .ndo_set_vf_trust       = ixgbe_ndo_set_vf_trust,
        .ndo_get_vf_config      = ixgbe_ndo_get_vf_config,
        .ndo_get_stats64        = ixgbe_get_stats64,
        .ndo_setup_tc           = __ixgbe_setup_tc,
#ifdef IXGBE_FCOE
        .ndo_select_queue       = ixgbe_select_queue,
        .ndo_fcoe_ddp_setup = ixgbe_fcoe_ddp_get,
        .ndo_fcoe_ddp_target = ixgbe_fcoe_ddp_target,
        .ndo_fcoe_ddp_done = ixgbe_fcoe_ddp_put,
        .ndo_fcoe_enable = ixgbe_fcoe_enable,
        .ndo_fcoe_disable = ixgbe_fcoe_disable,
        .ndo_fcoe_get_wwn = ixgbe_fcoe_get_wwn,
        .ndo_fcoe_get_hbainfo = ixgbe_fcoe_get_hbainfo,
#endif /* IXGBE_FCOE */
        .ndo_set_features = ixgbe_set_features,
        .ndo_fix_features = ixgbe_fix_features,
        .ndo_fdb_add            = ixgbe_ndo_fdb_add,
        .ndo_bridge_setlink     = ixgbe_ndo_bridge_setlink,
        .ndo_bridge_getlink     = ixgbe_ndo_bridge_getlink,
        .ndo_dfwd_add_station   = ixgbe_fwd_add,
        .ndo_dfwd_del_station   = ixgbe_fwd_del,
        .ndo_features_check     = ixgbe_features_check,
        .ndo_bpf                = ixgbe_xdp,
        .ndo_xdp_xmit           = ixgbe_xdp_xmit,
        .ndo_xsk_wakeup         = ixgbe_xsk_wakeup,
};

static void ixgbe_disable_txr_hw(struct ixgbe_adapter *adapter,
                                 struct ixgbe_ring *tx_ring)
{
        unsigned long wait_delay, delay_interval;
        struct ixgbe_hw *hw = &adapter->hw;
        u8 reg_idx = tx_ring->reg_idx;
        int wait_loop;
        u32 txdctl;

        IXGBE_WRITE_REG(hw, IXGBE_TXDCTL(reg_idx), IXGBE_TXDCTL_SWFLSH);

        /* delay mechanism from ixgbe_disable_tx */
        delay_interval = ixgbe_get_completion_timeout(adapter) / 100;

        wait_loop = IXGBE_MAX_RX_DESC_POLL;
        wait_delay = delay_interval;

        while (wait_loop--) {
                usleep_range(wait_delay, wait_delay + 10);
                wait_delay += delay_interval * 2;
                txdctl = IXGBE_READ_REG(hw, IXGBE_TXDCTL(reg_idx));

                if (!(txdctl & IXGBE_TXDCTL_ENABLE))
                        return;
        }

        e_err(drv, "TXDCTL.ENABLE not cleared within the polling period\n");
}

static void ixgbe_disable_txr(struct ixgbe_adapter *adapter,
                              struct ixgbe_ring *tx_ring)
{
        set_bit(__IXGBE_TX_DISABLED, &tx_ring->state);
        ixgbe_disable_txr_hw(adapter, tx_ring);
}

static void ixgbe_disable_rxr_hw(struct ixgbe_adapter *adapter,
                                 struct ixgbe_ring *rx_ring)
{
        unsigned long wait_delay, delay_interval;
        struct ixgbe_hw *hw = &adapter->hw;
        u8 reg_idx = rx_ring->reg_idx;
        int wait_loop;
        u32 rxdctl;

        rxdctl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(reg_idx));
        rxdctl &= ~IXGBE_RXDCTL_ENABLE;
        rxdctl |= IXGBE_RXDCTL_SWFLSH;

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

        /* RXDCTL.EN may not change on 82598 if link is down, so skip it */
        if (hw->mac.type == ixgbe_mac_82598EB &&
            !(IXGBE_READ_REG(hw, IXGBE_LINKS) & IXGBE_LINKS_UP))
                return;

        /* delay mechanism from ixgbe_disable_rx */
        delay_interval = ixgbe_get_completion_timeout(adapter) / 100;

        wait_loop = IXGBE_MAX_RX_DESC_POLL;
        wait_delay = delay_interval;

        while (wait_loop--) {
                usleep_range(wait_delay, wait_delay + 10);
                wait_delay += delay_interval * 2;
                rxdctl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(reg_idx));

                if (!(rxdctl & IXGBE_RXDCTL_ENABLE))
                        return;
        }

        e_err(drv, "RXDCTL.ENABLE not cleared within the polling period\n");
}

static void ixgbe_reset_txr_stats(struct ixgbe_ring *tx_ring)
{
        memset(&tx_ring->stats, 0, sizeof(tx_ring->stats));
        memset(&tx_ring->tx_stats, 0, sizeof(tx_ring->tx_stats));
}

static void ixgbe_reset_rxr_stats(struct ixgbe_ring *rx_ring)
{
        memset(&rx_ring->stats, 0, sizeof(rx_ring->stats));
        memset(&rx_ring->rx_stats, 0, sizeof(rx_ring->rx_stats));
}

/**
 * ixgbe_txrx_ring_disable - Disable Rx/Tx/XDP Tx rings
 * @adapter: adapter structure
 * @ring: ring index
 *
 * This function disables a certain Rx/Tx/XDP Tx ring. The function
 * assumes that the netdev is running.
 **/
void ixgbe_txrx_ring_disable(struct ixgbe_adapter *adapter, int ring)
{
        struct ixgbe_ring *rx_ring, *tx_ring, *xdp_ring;

        rx_ring = adapter->rx_ring[ring];
        tx_ring = adapter->tx_ring[ring];
        xdp_ring = adapter->xdp_ring[ring];

        ixgbe_disable_txr(adapter, tx_ring);
        if (xdp_ring)
                ixgbe_disable_txr(adapter, xdp_ring);
        ixgbe_disable_rxr_hw(adapter, rx_ring);

        if (xdp_ring)
                synchronize_rcu();

        /* Rx/Tx/XDP Tx share the same napi context. */
        napi_disable(&rx_ring->q_vector->napi);

        ixgbe_clean_tx_ring(tx_ring);
        if (xdp_ring)
                ixgbe_clean_tx_ring(xdp_ring);
        ixgbe_clean_rx_ring(rx_ring);

        ixgbe_reset_txr_stats(tx_ring);
        if (xdp_ring)
                ixgbe_reset_txr_stats(xdp_ring);
        ixgbe_reset_rxr_stats(rx_ring);
}

/**
 * ixgbe_txrx_ring_enable - Enable Rx/Tx/XDP Tx rings
 * @adapter: adapter structure
 * @ring: ring index
 *
 * This function enables a certain Rx/Tx/XDP Tx ring. The function
 * assumes that the netdev is running.
 **/
void ixgbe_txrx_ring_enable(struct ixgbe_adapter *adapter, int ring)
{
        struct ixgbe_ring *rx_ring, *tx_ring, *xdp_ring;

        rx_ring = adapter->rx_ring[ring];
        tx_ring = adapter->tx_ring[ring];
        xdp_ring = adapter->xdp_ring[ring];

        /* Rx/Tx/XDP Tx share the same napi context. */
        napi_enable(&rx_ring->q_vector->napi);

        ixgbe_configure_tx_ring(adapter, tx_ring);
        if (xdp_ring)
                ixgbe_configure_tx_ring(adapter, xdp_ring);
        ixgbe_configure_rx_ring(adapter, rx_ring);

        clear_bit(__IXGBE_TX_DISABLED, &tx_ring->state);
        if (xdp_ring)
                clear_bit(__IXGBE_TX_DISABLED, &xdp_ring->state);
}

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

        /* Some cards can not use the generic count PCIe functions method,
         * because they are behind a parent switch, so we hardcode these with
         * the correct number of functions.
         */
        if (ixgbe_pcie_from_parent(&adapter->hw))
                physfns = 4;

        list_for_each_entry(entry, &adapter->pdev->bus->devices, bus_list) {
                /* don't count virtual functions */
                if (entry->is_virtfn)
                        continue;

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

                physfns++;
        }

        return physfns;
}

/**
 * ixgbe_wol_supported - Check whether device supports WoL
 * @adapter: the adapter private structure
 * @device_id: the device ID
 * @subdevice_id: the subsystem device ID
 *
 * This function is used by probe and ethtool to determine
 * which devices have WoL support
 *
 **/
bool ixgbe_wol_supported(struct ixgbe_adapter *adapter, u16 device_id,
                         u16 subdevice_id)
{
        struct ixgbe_hw *hw = &adapter->hw;
        u16 wol_cap = adapter->eeprom_cap & IXGBE_DEVICE_CAPS_WOL_MASK;

        /* WOL not supported on 82598 */
        if (hw->mac.type == ixgbe_mac_82598EB)
                return false;

        /* check eeprom to see if WOL is enabled for X540 and newer */
        if (hw->mac.type >= ixgbe_mac_X540) {
                if ((wol_cap == IXGBE_DEVICE_CAPS_WOL_PORT0_1) ||
                    ((wol_cap == IXGBE_DEVICE_CAPS_WOL_PORT0) &&
                     (hw->bus.func == 0)))
                        return true;
        }

        /* WOL is determined based on device IDs for 82599 MACs */
        switch (device_id) {
        case IXGBE_DEV_ID_82599_SFP:
                /* Only these subdevices could supports WOL */
                switch (subdevice_id) {
                case IXGBE_SUBDEV_ID_82599_560FLR:
                case IXGBE_SUBDEV_ID_82599_LOM_SNAP6:
                case IXGBE_SUBDEV_ID_82599_SFP_WOL0:
                case IXGBE_SUBDEV_ID_82599_SFP_2OCP:
                        /* only support first port */
                        if (hw->bus.func != 0)
                                break;
                        fallthrough;
                case IXGBE_SUBDEV_ID_82599_SP_560FLR:
                case IXGBE_SUBDEV_ID_82599_SFP:
                case IXGBE_SUBDEV_ID_82599_RNDC:
                case IXGBE_SUBDEV_ID_82599_ECNA_DP:
                case IXGBE_SUBDEV_ID_82599_SFP_1OCP:
                case IXGBE_SUBDEV_ID_82599_SFP_LOM_OEM1:
                case IXGBE_SUBDEV_ID_82599_SFP_LOM_OEM2:
                        return true;
                }
                break;
        case IXGBE_DEV_ID_82599EN_SFP:
                /* Only these subdevices support WOL */
                switch (subdevice_id) {
                case IXGBE_SUBDEV_ID_82599EN_SFP_OCP1:
                        return true;
                }
                break;
        case IXGBE_DEV_ID_82599_COMBO_BACKPLANE:
                /* All except this subdevice support WOL */
                if (subdevice_id != IXGBE_SUBDEV_ID_82599_KX4_KR_MEZZ)
                        return true;
                break;
        case IXGBE_DEV_ID_82599_KX4:
                return  true;
        default:
                break;
        }

        return false;
}

/**
 * ixgbe_set_fw_version - Set FW version
 * @adapter: the adapter private structure
 *
 * This function is used by probe and ethtool to determine the FW version to
 * format to display. The FW version is taken from the EEPROM/NVM.
 */
static void ixgbe_set_fw_version(struct ixgbe_adapter *adapter)
{
        struct ixgbe_hw *hw = &adapter->hw;
        struct ixgbe_nvm_version nvm_ver;

        ixgbe_get_oem_prod_version(hw, &nvm_ver);
        if (nvm_ver.oem_valid) {
                snprintf(adapter->eeprom_id, sizeof(adapter->eeprom_id),
                         "%x.%x.%x", nvm_ver.oem_major, nvm_ver.oem_minor,
                         nvm_ver.oem_release);
                return;
        }

        ixgbe_get_etk_id(hw, &nvm_ver);
        ixgbe_get_orom_version(hw, &nvm_ver);

        if (nvm_ver.or_valid) {
                snprintf(adapter->eeprom_id, sizeof(adapter->eeprom_id),
                         "0x%08x, %d.%d.%d", nvm_ver.etk_id, nvm_ver.or_major,
                         nvm_ver.or_build, nvm_ver.or_patch);
                return;
        }

        /* Set ETrack ID format */
        snprintf(adapter->eeprom_id, sizeof(adapter->eeprom_id),
                 "0x%08x", nvm_ver.etk_id);
}

/**
 * ixgbe_probe - Device Initialization Routine
 * @pdev: PCI device information struct
 * @ent: entry in ixgbe_pci_tbl
 *
 * Returns 0 on success, negative on failure
 *
 * ixgbe_probe initializes an adapter identified by a pci_dev structure.
 * The OS initialization, configuring of the adapter private structure,
 * and a hardware reset occur.
 **/
static int ixgbe_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
{
        struct net_device *netdev;
        struct ixgbe_adapter *adapter = NULL;
        struct ixgbe_hw *hw;
        const struct ixgbe_info *ii = ixgbe_info_tbl[ent->driver_data];
        int i, err, pci_using_dac, expected_gts;
        unsigned int indices = MAX_TX_QUEUES;
        u8 part_str[IXGBE_PBANUM_LENGTH];
        bool disable_dev = false;
#ifdef IXGBE_FCOE
        u16 device_caps;
#endif
        u32 eec;

        /* Catch broken hardware that put the wrong VF device ID in
         * the PCIe SR-IOV capability.
         */
        if (pdev->is_virtfn) {
                WARN(1, KERN_ERR "%s (%hx:%hx) should not be a VF!\n",
                     pci_name(pdev), pdev->vendor, pdev->device);
                return -EINVAL;
        }

        err = pci_enable_device_mem(pdev);
        if (err)
                return err;

        if (!dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64))) {
                pci_using_dac = 1;
        } else {
                err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
                if (err) {
                        dev_err(&pdev->dev,
                                "No usable DMA configuration, aborting\n");
                        goto err_dma;
                }
                pci_using_dac = 0;
        }

        err = pci_request_mem_regions(pdev, ixgbe_driver_name);
        if (err) {
                dev_err(&pdev->dev,
                        "pci_request_selected_regions failed 0x%x\n", err);
                goto err_pci_reg;
        }

        pci_enable_pcie_error_reporting(pdev);

        pci_set_master(pdev);
        pci_save_state(pdev);

        if (ii->mac == ixgbe_mac_82598EB) {
#ifdef CONFIG_IXGBE_DCB
                /* 8 TC w/ 4 queues per TC */
                indices = 4 * MAX_TRAFFIC_CLASS;
#else
                indices = IXGBE_MAX_RSS_INDICES;
#endif
        }

        netdev = alloc_etherdev_mq(sizeof(struct ixgbe_adapter), indices);
        if (!netdev) {
                err = -ENOMEM;
                goto err_alloc_etherdev;
        }

        SET_NETDEV_DEV(netdev, &pdev->dev);

        adapter = netdev_priv(netdev);

        adapter->netdev = netdev;
        adapter->pdev = pdev;
        hw = &adapter->hw;
        hw->back = adapter;
        adapter->msg_enable = netif_msg_init(debug, DEFAULT_MSG_ENABLE);

        hw->hw_addr = ioremap(pci_resource_start(pdev, 0),
                              pci_resource_len(pdev, 0));
        adapter->io_addr = hw->hw_addr;
        if (!hw->hw_addr) {
                err = -EIO;
                goto err_ioremap;
        }

        netdev->netdev_ops = &ixgbe_netdev_ops;
        ixgbe_set_ethtool_ops(netdev);
        netdev->watchdog_timeo = 5 * HZ;
        strlcpy(netdev->name, pci_name(pdev), sizeof(netdev->name));

        /* Setup hw api */
        hw->mac.ops   = *ii->mac_ops;
        hw->mac.type  = ii->mac;
        hw->mvals     = ii->mvals;
        if (ii->link_ops)
                hw->link.ops  = *ii->link_ops;

        /* EEPROM */
        hw->eeprom.ops = *ii->eeprom_ops;
        eec = IXGBE_READ_REG(hw, IXGBE_EEC(hw));
        if (ixgbe_removed(hw->hw_addr)) {
                err = -EIO;
                goto err_ioremap;
        }
        /* If EEPROM is valid (bit 8 = 1), use default otherwise use bit bang */
        if (!(eec & BIT(8)))
                hw->eeprom.ops.read = &ixgbe_read_eeprom_bit_bang_generic;

        /* PHY */
        hw->phy.ops = *ii->phy_ops;
        hw->phy.sfp_type = ixgbe_sfp_type_unknown;
        /* ixgbe_identify_phy_generic will set prtad and mmds properly */
        hw->phy.mdio.prtad = MDIO_PRTAD_NONE;
        hw->phy.mdio.mmds = 0;
        hw->phy.mdio.mode_support = MDIO_SUPPORTS_C45 | MDIO_EMULATE_C22;
        hw->phy.mdio.dev = netdev;
        hw->phy.mdio.mdio_read = ixgbe_mdio_read;
        hw->phy.mdio.mdio_write = ixgbe_mdio_write;

        /* setup the private structure */
        err = ixgbe_sw_init(adapter, ii);
        if (err)
                goto err_sw_init;

        switch (adapter->hw.mac.type) {
        case ixgbe_mac_X550:
        case ixgbe_mac_X550EM_x:
                netdev->udp_tunnel_nic_info = &ixgbe_udp_tunnels_x550;
                break;
        case ixgbe_mac_x550em_a:
                netdev->udp_tunnel_nic_info = &ixgbe_udp_tunnels_x550em_a;
                break;
        default:
                break;
        }

        /* Make sure the SWFW semaphore is in a valid state */
        if (hw->mac.ops.init_swfw_sync)
                hw->mac.ops.init_swfw_sync(hw);

        /* Make it possible the adapter to be woken up via WOL */
        switch (adapter->hw.mac.type) {
        case ixgbe_mac_82599EB:
        case ixgbe_mac_X540:
        case ixgbe_mac_X550:
        case ixgbe_mac_X550EM_x:
        case ixgbe_mac_x550em_a:
                IXGBE_WRITE_REG(&adapter->hw, IXGBE_WUS, ~0);
                break;
        default:
                break;
        }

        /*
         * If there is a fan on this device and it has failed log the
         * failure.
         */
        if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE) {
                u32 esdp = IXGBE_READ_REG(hw, IXGBE_ESDP);
                if (esdp & IXGBE_ESDP_SDP1)
                        e_crit(probe, "Fan has stopped, replace the adapter\n");
        }

        if (allow_unsupported_sfp)
                hw->allow_unsupported_sfp = allow_unsupported_sfp;

        /* reset_hw fills in the perm_addr as well */
        hw->phy.reset_if_overtemp = true;
        err = hw->mac.ops.reset_hw(hw);
        hw->phy.reset_if_overtemp = false;
        ixgbe_set_eee_capable(adapter);
        if (err == IXGBE_ERR_SFP_NOT_PRESENT) {
                err = 0;
        } else if (err == IXGBE_ERR_SFP_NOT_SUPPORTED) {
                e_dev_err("failed to load because an unsupported SFP+ or QSFP module type was detected.\n");
                e_dev_err("Reload the driver after installing a supported module.\n");
                goto err_sw_init;
        } else if (err) {
                e_dev_err("HW Init failed: %d\n", err);
                goto err_sw_init;
        }

#ifdef CONFIG_PCI_IOV
        /* SR-IOV not supported on the 82598 */
        if (adapter->hw.mac.type == ixgbe_mac_82598EB)
                goto skip_sriov;
        /* Mailbox */
        ixgbe_init_mbx_params_pf(hw);
        hw->mbx.ops = ii->mbx_ops;
        pci_sriov_set_totalvfs(pdev, IXGBE_MAX_VFS_DRV_LIMIT);
        ixgbe_enable_sriov(adapter, max_vfs);
skip_sriov:

#endif
        netdev->features = NETIF_F_SG |
                           NETIF_F_TSO |
                           NETIF_F_TSO6 |
                           NETIF_F_RXHASH |
                           NETIF_F_RXCSUM |
                           NETIF_F_HW_CSUM;

#define IXGBE_GSO_PARTIAL_FEATURES (NETIF_F_GSO_GRE | \
                                    NETIF_F_GSO_GRE_CSUM | \
                                    NETIF_F_GSO_IPXIP4 | \
                                    NETIF_F_GSO_IPXIP6 | \
                                    NETIF_F_GSO_UDP_TUNNEL | \
                                    NETIF_F_GSO_UDP_TUNNEL_CSUM)

        netdev->gso_partial_features = IXGBE_GSO_PARTIAL_FEATURES;
        netdev->features |= NETIF_F_GSO_PARTIAL |
                            IXGBE_GSO_PARTIAL_FEATURES;

        if (hw->mac.type >= ixgbe_mac_82599EB)
                netdev->features |= NETIF_F_SCTP_CRC | NETIF_F_GSO_UDP_L4;

#ifdef CONFIG_IXGBE_IPSEC
#define IXGBE_ESP_FEATURES      (NETIF_F_HW_ESP | \
                                 NETIF_F_HW_ESP_TX_CSUM | \
                                 NETIF_F_GSO_ESP)

        if (adapter->ipsec)
                netdev->features |= IXGBE_ESP_FEATURES;
#endif
        /* copy netdev features into list of user selectable features */
        netdev->hw_features |= netdev->features |
                               NETIF_F_HW_VLAN_CTAG_FILTER |
                               NETIF_F_HW_VLAN_CTAG_RX |
                               NETIF_F_HW_VLAN_CTAG_TX |
                               NETIF_F_RXALL |
                               NETIF_F_HW_L2FW_DOFFLOAD;

        if (hw->mac.type >= ixgbe_mac_82599EB)
                netdev->hw_features |= NETIF_F_NTUPLE |
                                       NETIF_F_HW_TC;

        if (pci_using_dac)
                netdev->features |= NETIF_F_HIGHDMA;

        netdev->vlan_features |= netdev->features | NETIF_F_TSO_MANGLEID;
        netdev->hw_enc_features |= netdev->vlan_features;
        netdev->mpls_features |= NETIF_F_SG |
                                 NETIF_F_TSO |
                                 NETIF_F_TSO6 |
                                 NETIF_F_HW_CSUM;
        netdev->mpls_features |= IXGBE_GSO_PARTIAL_FEATURES;

        /* set this bit last since it cannot be part of vlan_features */
        netdev->features |= NETIF_F_HW_VLAN_CTAG_FILTER |
                            NETIF_F_HW_VLAN_CTAG_RX |
                            NETIF_F_HW_VLAN_CTAG_TX;

        netdev->priv_flags |= IFF_UNICAST_FLT;
        netdev->priv_flags |= IFF_SUPP_NOFCS;

        /* MTU range: 68 - 9710 */
        netdev->min_mtu = ETH_MIN_MTU;
        netdev->max_mtu = IXGBE_MAX_JUMBO_FRAME_SIZE - (ETH_HLEN + ETH_FCS_LEN);

#ifdef CONFIG_IXGBE_DCB
        if (adapter->flags & IXGBE_FLAG_DCB_CAPABLE)
                netdev->dcbnl_ops = &ixgbe_dcbnl_ops;
#endif

#ifdef IXGBE_FCOE
        if (adapter->flags & IXGBE_FLAG_FCOE_CAPABLE) {
                unsigned int fcoe_l;

                if (hw->mac.ops.get_device_caps) {
                        hw->mac.ops.get_device_caps(hw, &device_caps);
                        if (device_caps & IXGBE_DEVICE_CAPS_FCOE_OFFLOADS)
                                adapter->flags &= ~IXGBE_FLAG_FCOE_CAPABLE;
                }


                fcoe_l = min_t(int, IXGBE_FCRETA_SIZE, num_online_cpus());
                adapter->ring_feature[RING_F_FCOE].limit = fcoe_l;

                netdev->features |= NETIF_F_FSO |
                                    NETIF_F_FCOE_CRC;

                netdev->vlan_features |= NETIF_F_FSO |
                                         NETIF_F_FCOE_CRC |
                                         NETIF_F_FCOE_MTU;
        }
#endif /* IXGBE_FCOE */
        if (adapter->flags2 & IXGBE_FLAG2_RSC_CAPABLE)
                netdev->hw_features |= NETIF_F_LRO;
        if (adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED)
                netdev->features |= NETIF_F_LRO;

        if (ixgbe_check_fw_error(adapter)) {
                err = -EIO;
                goto err_sw_init;
        }

        /* make sure the EEPROM is good */
        if (hw->eeprom.ops.validate_checksum(hw, NULL) < 0) {
                e_dev_err("The EEPROM Checksum Is Not Valid\n");
                err = -EIO;
                goto err_sw_init;
        }

        eth_platform_get_mac_address(&adapter->pdev->dev,
                                     adapter->hw.mac.perm_addr);

        memcpy(netdev->dev_addr, hw->mac.perm_addr, netdev->addr_len);

        if (!is_valid_ether_addr(netdev->dev_addr)) {
                e_dev_err("invalid MAC address\n");
                err = -EIO;
                goto err_sw_init;
        }

        /* Set hw->mac.addr to permanent MAC address */
        ether_addr_copy(hw->mac.addr, hw->mac.perm_addr);
        ixgbe_mac_set_default_filter(adapter);

        timer_setup(&adapter->service_timer, ixgbe_service_timer, 0);

        if (ixgbe_removed(hw->hw_addr)) {
                err = -EIO;
                goto err_sw_init;
        }
        INIT_WORK(&adapter->service_task, ixgbe_service_task);
        set_bit(__IXGBE_SERVICE_INITED, &adapter->state);
        clear_bit(__IXGBE_SERVICE_SCHED, &adapter->state);

        err = ixgbe_init_interrupt_scheme(adapter);
        if (err)
                goto err_sw_init;

        for (i = 0; i < adapter->num_rx_queues; i++)
                u64_stats_init(&adapter->rx_ring[i]->syncp);
        for (i = 0; i < adapter->num_tx_queues; i++)
                u64_stats_init(&adapter->tx_ring[i]->syncp);
        for (i = 0; i < adapter->num_xdp_queues; i++)
                u64_stats_init(&adapter->xdp_ring[i]->syncp);

        /* WOL not supported for all devices */
        adapter->wol = 0;
        hw->eeprom.ops.read(hw, 0x2c, &adapter->eeprom_cap);
        hw->wol_enabled = ixgbe_wol_supported(adapter, pdev->device,
                                                pdev->subsystem_device);
        if (hw->wol_enabled)
                adapter->wol = IXGBE_WUFC_MAG;

        device_set_wakeup_enable(&adapter->pdev->dev, adapter->wol);

        /* save off EEPROM version number */
        ixgbe_set_fw_version(adapter);

        /* pick up the PCI bus settings for reporting later */
        if (ixgbe_pcie_from_parent(hw))
                ixgbe_get_parent_bus_info(adapter);
        else
                 hw->mac.ops.get_bus_info(hw);

        /* calculate the expected PCIe bandwidth required for optimal
         * performance. Note that some older parts will never have enough
         * bandwidth due to being older generation PCIe parts. We clamp these
         * parts to ensure no warning is displayed if it can't be fixed.
         */
        switch (hw->mac.type) {
        case ixgbe_mac_82598EB:
                expected_gts = min(ixgbe_enumerate_functions(adapter) * 10, 16);
                break;
        default:
                expected_gts = ixgbe_enumerate_functions(adapter) * 10;
                break;
        }

        /* don't check link if we failed to enumerate functions */
        if (expected_gts > 0)
                ixgbe_check_minimum_link(adapter, expected_gts);

        err = ixgbe_read_pba_string_generic(hw, part_str, sizeof(part_str));
        if (err)
                strlcpy(part_str, "Unknown", sizeof(part_str));
        if (ixgbe_is_sfp(hw) && hw->phy.sfp_type != ixgbe_sfp_type_not_present)
                e_dev_info("MAC: %d, PHY: %d, SFP+: %d, PBA No: %s\n",
                           hw->mac.type, hw->phy.type, hw->phy.sfp_type,
                           part_str);
        else
                e_dev_info("MAC: %d, PHY: %d, PBA No: %s\n",
                           hw->mac.type, hw->phy.type, part_str);

        e_dev_info("%pM\n", netdev->dev_addr);

        /* reset the hardware with the new settings */
        err = hw->mac.ops.start_hw(hw);
        if (err == IXGBE_ERR_EEPROM_VERSION) {
                /* We are running on a pre-production device, log a warning */
                e_dev_warn("This device is a pre-production adapter/LOM. "
                           "Please be aware there may be issues associated "
                           "with your hardware.  If you are experiencing "
                           "problems please contact your Intel or hardware "
                           "representative who provided you with this "
                           "hardware.\n");
        }
        strcpy(netdev->name, "eth%d");
        pci_set_drvdata(pdev, adapter);
        err = register_netdev(netdev);
        if (err)
                goto err_register;


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

        /* carrier off reporting is important to ethtool even BEFORE open */
        netif_carrier_off(netdev);

#ifdef CONFIG_IXGBE_DCA
        if (dca_add_requester(&pdev->dev) == 0) {
                adapter->flags |= IXGBE_FLAG_DCA_ENABLED;
                ixgbe_setup_dca(adapter);
        }
#endif
        if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) {
                e_info(probe, "IOV is enabled with %d VFs\n", adapter->num_vfs);
                for (i = 0; i < adapter->num_vfs; i++)
                        ixgbe_vf_configuration(pdev, (i | 0x10000000));
        }

        /* firmware requires driver version to be 0xFFFFFFFF
         * since os does not support feature
         */
        if (hw->mac.ops.set_fw_drv_ver)
                hw->mac.ops.set_fw_drv_ver(hw, 0xFF, 0xFF, 0xFF, 0xFF,
                                           sizeof(UTS_RELEASE) - 1,
                                           UTS_RELEASE);

        /* add san mac addr to netdev */
        ixgbe_add_sanmac_netdev(netdev);

        e_dev_info("%s\n", ixgbe_default_device_descr);

#ifdef CONFIG_IXGBE_HWMON
        if (ixgbe_sysfs_init(adapter))
                e_err(probe, "failed to allocate sysfs resources\n");
#endif /* CONFIG_IXGBE_HWMON */

        ixgbe_dbg_adapter_init(adapter);

        /* setup link for SFP devices with MNG FW, else wait for IXGBE_UP */
        if (ixgbe_mng_enabled(hw) && ixgbe_is_sfp(hw) && hw->mac.ops.setup_link)
                hw->mac.ops.setup_link(hw,
                        IXGBE_LINK_SPEED_10GB_FULL | IXGBE_LINK_SPEED_1GB_FULL,
                        true);

        err = ixgbe_mii_bus_init(hw);
        if (err)
                goto err_netdev;

        return 0;

err_netdev:
        unregister_netdev(netdev);
err_register:
        ixgbe_release_hw_control(adapter);
        ixgbe_clear_interrupt_scheme(adapter);
err_sw_init:
        ixgbe_disable_sriov(adapter);
        adapter->flags2 &= ~IXGBE_FLAG2_SEARCH_FOR_SFP;
        iounmap(adapter->io_addr);
        kfree(adapter->jump_tables[0]);
        kfree(adapter->mac_table);
        kfree(adapter->rss_key);
        bitmap_free(adapter->af_xdp_zc_qps);
err_ioremap:
        disable_dev = !test_and_set_bit(__IXGBE_DISABLED, &adapter->state);
        free_netdev(netdev);
err_alloc_etherdev:
        pci_disable_pcie_error_reporting(pdev);
        pci_release_mem_regions(pdev);
err_pci_reg:
err_dma:
        if (!adapter || disable_dev)
                pci_disable_device(pdev);
        return err;
}

/**
 * ixgbe_remove - Device Removal Routine
 * @pdev: PCI device information struct
 *
 * ixgbe_remove is called by the PCI subsystem to alert the driver
 * that it should release a PCI device.  The could be caused by a
 * Hot-Plug event, or because the driver is going to be removed from
 * memory.
 **/
static void ixgbe_remove(struct pci_dev *pdev)
{
        struct ixgbe_adapter *adapter = pci_get_drvdata(pdev);
        struct net_device *netdev;
        bool disable_dev;
        int i;

        /* if !adapter then we already cleaned up in probe */
        if (!adapter)
                return;

        netdev  = adapter->netdev;
        ixgbe_dbg_adapter_exit(adapter);

        set_bit(__IXGBE_REMOVING, &adapter->state);
        cancel_work_sync(&adapter->service_task);

        if (adapter->mii_bus)
                mdiobus_unregister(adapter->mii_bus);

#ifdef CONFIG_IXGBE_DCA
        if (adapter->flags & IXGBE_FLAG_DCA_ENABLED) {
                adapter->flags &= ~IXGBE_FLAG_DCA_ENABLED;
                dca_remove_requester(&pdev->dev);
                IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_CTRL,
                                IXGBE_DCA_CTRL_DCA_DISABLE);
        }

#endif
#ifdef CONFIG_IXGBE_HWMON
        ixgbe_sysfs_exit(adapter);
#endif /* CONFIG_IXGBE_HWMON */

        /* remove the added san mac */
        ixgbe_del_sanmac_netdev(netdev);

#ifdef CONFIG_PCI_IOV
        ixgbe_disable_sriov(adapter);
#endif
        if (netdev->reg_state == NETREG_REGISTERED)
                unregister_netdev(netdev);

        ixgbe_stop_ipsec_offload(adapter);
        ixgbe_clear_interrupt_scheme(adapter);

        ixgbe_release_hw_control(adapter);

#ifdef CONFIG_DCB
        kfree(adapter->ixgbe_ieee_pfc);
        kfree(adapter->ixgbe_ieee_ets);

#endif
        iounmap(adapter->io_addr);
        pci_release_mem_regions(pdev);

        e_dev_info("complete\n");

        for (i = 0; i < IXGBE_MAX_LINK_HANDLE; i++) {
                if (adapter->jump_tables[i]) {
                        kfree(adapter->jump_tables[i]->input);
                        kfree(adapter->jump_tables[i]->mask);
                }
                kfree(adapter->jump_tables[i]);
        }

        kfree(adapter->mac_table);
        kfree(adapter->rss_key);
        bitmap_free(adapter->af_xdp_zc_qps);
        disable_dev = !test_and_set_bit(__IXGBE_DISABLED, &adapter->state);
        free_netdev(netdev);

        pci_disable_pcie_error_reporting(pdev);

        if (disable_dev)
                pci_disable_device(pdev);
}

/**
 * ixgbe_io_error_detected - called when PCI error is detected
 * @pdev: Pointer to PCI device
 * @state: The current pci connection state
 *
 * This function is called after a PCI bus error affecting
 * this device has been detected.
 */
static pci_ers_result_t ixgbe_io_error_detected(struct pci_dev *pdev,
                                                pci_channel_state_t state)
{
        struct ixgbe_adapter *adapter = pci_get_drvdata(pdev);
        struct net_device *netdev = adapter->netdev;

#ifdef CONFIG_PCI_IOV
        struct ixgbe_hw *hw = &adapter->hw;
        struct pci_dev *bdev, *vfdev;
        u32 dw0, dw1, dw2, dw3;
        int vf, pos;
        u16 req_id, pf_func;

        if (adapter->hw.mac.type == ixgbe_mac_82598EB ||
            adapter->num_vfs == 0)
                goto skip_bad_vf_detection;

        bdev = pdev->bus->self;
        while (bdev && (pci_pcie_type(bdev) != PCI_EXP_TYPE_ROOT_PORT))
                bdev = bdev->bus->self;

        if (!bdev)
                goto skip_bad_vf_detection;

        pos = pci_find_ext_capability(bdev, PCI_EXT_CAP_ID_ERR);
        if (!pos)
                goto skip_bad_vf_detection;

        dw0 = ixgbe_read_pci_cfg_dword(hw, pos + PCI_ERR_HEADER_LOG);
        dw1 = ixgbe_read_pci_cfg_dword(hw, pos + PCI_ERR_HEADER_LOG + 4);
        dw2 = ixgbe_read_pci_cfg_dword(hw, pos + PCI_ERR_HEADER_LOG + 8);
        dw3 = ixgbe_read_pci_cfg_dword(hw, pos + PCI_ERR_HEADER_LOG + 12);
        if (ixgbe_removed(hw->hw_addr))
                goto skip_bad_vf_detection;

        req_id = dw1 >> 16;
        /* On the 82599 if bit 7 of the requestor ID is set then it's a VF */
        if (!(req_id & 0x0080))
                goto skip_bad_vf_detection;

        pf_func = req_id & 0x01;
        if ((pf_func & 1) == (pdev->devfn & 1)) {
                unsigned int device_id;

                vf = (req_id & 0x7F) >> 1;
                e_dev_err("VF %d has caused a PCIe error\n", vf);
                e_dev_err("TLP: dw0: %8.8x\tdw1: %8.8x\tdw2: "
                                "%8.8x\tdw3: %8.8x\n",
                dw0, dw1, dw2, dw3);
                switch (adapter->hw.mac.type) {
                case ixgbe_mac_82599EB:
                        device_id = IXGBE_82599_VF_DEVICE_ID;
                        break;
                case ixgbe_mac_X540:
                        device_id = IXGBE_X540_VF_DEVICE_ID;
                        break;
                case ixgbe_mac_X550:
                        device_id = IXGBE_DEV_ID_X550_VF;
                        break;
                case ixgbe_mac_X550EM_x:
                        device_id = IXGBE_DEV_ID_X550EM_X_VF;
                        break;
                case ixgbe_mac_x550em_a:
                        device_id = IXGBE_DEV_ID_X550EM_A_VF;
                        break;
                default:
                        device_id = 0;
                        break;
                }

                /* Find the pci device of the offending VF */
                vfdev = pci_get_device(PCI_VENDOR_ID_INTEL, device_id, NULL);
                while (vfdev) {
                        if (vfdev->devfn == (req_id & 0xFF))
                                break;
                        vfdev = pci_get_device(PCI_VENDOR_ID_INTEL,
                                               device_id, vfdev);
                }
                /*
                 * There's a slim chance the VF could have been hot plugged,
                 * so if it is no longer present we don't need to issue the
                 * VFLR.  Just clean up the AER in that case.
                 */
                if (vfdev) {
                        pcie_flr(vfdev);
                        /* Free device reference count */
                        pci_dev_put(vfdev);
                }
        }

        /*
         * Even though the error may have occurred on the other port
         * we still need to increment the vf error reference count for
         * both ports because the I/O resume function will be called
         * for both of them.
         */
        adapter->vferr_refcount++;

        return PCI_ERS_RESULT_RECOVERED;

skip_bad_vf_detection:
#endif /* CONFIG_PCI_IOV */
        if (!test_bit(__IXGBE_SERVICE_INITED, &adapter->state))
                return PCI_ERS_RESULT_DISCONNECT;

        if (!netif_device_present(netdev))
                return PCI_ERS_RESULT_DISCONNECT;

        rtnl_lock();
        netif_device_detach(netdev);

        if (netif_running(netdev))
                ixgbe_close_suspend(adapter);

        if (state == pci_channel_io_perm_failure) {
                rtnl_unlock();
                return PCI_ERS_RESULT_DISCONNECT;
        }

        if (!test_and_set_bit(__IXGBE_DISABLED, &adapter->state))
                pci_disable_device(pdev);
        rtnl_unlock();

        /* Request a slot reset. */
        return PCI_ERS_RESULT_NEED_RESET;
}

/**
 * ixgbe_io_slot_reset - called after the pci bus has been reset.
 * @pdev: Pointer to PCI device
 *
 * Restart the card from scratch, as if from a cold-boot.
 */
static pci_ers_result_t ixgbe_io_slot_reset(struct pci_dev *pdev)
{
        struct ixgbe_adapter *adapter = pci_get_drvdata(pdev);
        pci_ers_result_t result;

        if (pci_enable_device_mem(pdev)) {
                e_err(probe, "Cannot re-enable PCI device after reset.\n");
                result = PCI_ERS_RESULT_DISCONNECT;
        } else {
                smp_mb__before_atomic();
                clear_bit(__IXGBE_DISABLED, &adapter->state);
                adapter->hw.hw_addr = adapter->io_addr;
                pci_set_master(pdev);
                pci_restore_state(pdev);
                pci_save_state(pdev);

                pci_wake_from_d3(pdev, false);

                ixgbe_reset(adapter);
                IXGBE_WRITE_REG(&adapter->hw, IXGBE_WUS, ~0);
                result = PCI_ERS_RESULT_RECOVERED;
        }

        return result;
}

/**
 * ixgbe_io_resume - called when traffic can start flowing again.
 * @pdev: Pointer to PCI device
 *
 * This callback is called when the error recovery driver tells us that
 * its OK to resume normal operation.
 */
static void ixgbe_io_resume(struct pci_dev *pdev)
{
        struct ixgbe_adapter *adapter = pci_get_drvdata(pdev);
        struct net_device *netdev = adapter->netdev;

#ifdef CONFIG_PCI_IOV
        if (adapter->vferr_refcount) {
                e_info(drv, "Resuming after VF err\n");
                adapter->vferr_refcount--;
                return;
        }

#endif
        rtnl_lock();
        if (netif_running(netdev))
                ixgbe_open(netdev);

        netif_device_attach(netdev);
        rtnl_unlock();
}

static const struct pci_error_handlers ixgbe_err_handler = {
        .error_detected = ixgbe_io_error_detected,
        .slot_reset = ixgbe_io_slot_reset,
        .resume = ixgbe_io_resume,
};

static SIMPLE_DEV_PM_OPS(ixgbe_pm_ops, ixgbe_suspend, ixgbe_resume);

static struct pci_driver ixgbe_driver = {
        .name      = ixgbe_driver_name,
        .id_table  = ixgbe_pci_tbl,
        .probe     = ixgbe_probe,
        .remove    = ixgbe_remove,
        .driver.pm = &ixgbe_pm_ops,
        .shutdown  = ixgbe_shutdown,
        .sriov_configure = ixgbe_pci_sriov_configure,
        .err_handler = &ixgbe_err_handler
};

/**
 * ixgbe_init_module - Driver Registration Routine
 *
 * ixgbe_init_module is the first routine called when the driver is
 * loaded. All it does is register with the PCI subsystem.
 **/
static int __init ixgbe_init_module(void)
{
        int ret;
        pr_info("%s\n", ixgbe_driver_string);
        pr_info("%s\n", ixgbe_copyright);

        ixgbe_wq = create_singlethread_workqueue(ixgbe_driver_name);
        if (!ixgbe_wq) {
                pr_err("%s: Failed to create workqueue\n", ixgbe_driver_name);
                return -ENOMEM;
        }

        ixgbe_dbg_init();

        ret = pci_register_driver(&ixgbe_driver);
        if (ret) {
                destroy_workqueue(ixgbe_wq);
                ixgbe_dbg_exit();
                return ret;
        }

#ifdef CONFIG_IXGBE_DCA
        dca_register_notify(&dca_notifier);
#endif

        return 0;
}

module_init(ixgbe_init_module);

/**
 * ixgbe_exit_module - Driver Exit Cleanup Routine
 *
 * ixgbe_exit_module is called just before the driver is removed
 * from memory.
 **/
static void __exit ixgbe_exit_module(void)
{
#ifdef CONFIG_IXGBE_DCA
        dca_unregister_notify(&dca_notifier);
#endif
        pci_unregister_driver(&ixgbe_driver);

        ixgbe_dbg_exit();
        if (ixgbe_wq) {
                destroy_workqueue(ixgbe_wq);
                ixgbe_wq = NULL;
        }
}

#ifdef CONFIG_IXGBE_DCA
static int ixgbe_notify_dca(struct notifier_block *nb, unsigned long event,
                            void *p)
{
        int ret_val;

        ret_val = driver_for_each_device(&ixgbe_driver.driver, NULL, &event,
                                         __ixgbe_notify_dca);

        return ret_val ? NOTIFY_BAD : NOTIFY_DONE;
}

#endif /* CONFIG_IXGBE_DCA */

module_exit(ixgbe_exit_module);

/* ixgbe_main.c */