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[mirror_ubuntu-zesty-kernel.git] / drivers / net / ethernet / intel / ixgbe / ixgbe_common.c

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

  Intel 10 Gigabit PCI Express Linux driver
  Copyright(c) 1999 - 2016 Intel Corporation.

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

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

  You should have received a copy of the GNU General Public License along with
  this program; if not, write to the Free Software Foundation, Inc.,
  51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.

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

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

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

#include <linux/pci.h>
#include <linux/delay.h>
#include <linux/sched.h>
#include <linux/netdevice.h>

#include "ixgbe.h"
#include "ixgbe_common.h"
#include "ixgbe_phy.h"

static s32 ixgbe_acquire_eeprom(struct ixgbe_hw *hw);
static s32 ixgbe_get_eeprom_semaphore(struct ixgbe_hw *hw);
static void ixgbe_release_eeprom_semaphore(struct ixgbe_hw *hw);
static s32 ixgbe_ready_eeprom(struct ixgbe_hw *hw);
static void ixgbe_standby_eeprom(struct ixgbe_hw *hw);
static void ixgbe_shift_out_eeprom_bits(struct ixgbe_hw *hw, u16 data,
                                        u16 count);
static u16 ixgbe_shift_in_eeprom_bits(struct ixgbe_hw *hw, u16 count);
static void ixgbe_raise_eeprom_clk(struct ixgbe_hw *hw, u32 *eec);
static void ixgbe_lower_eeprom_clk(struct ixgbe_hw *hw, u32 *eec);
static void ixgbe_release_eeprom(struct ixgbe_hw *hw);

static s32 ixgbe_mta_vector(struct ixgbe_hw *hw, u8 *mc_addr);
static s32 ixgbe_poll_eerd_eewr_done(struct ixgbe_hw *hw, u32 ee_reg);
static s32 ixgbe_read_eeprom_buffer_bit_bang(struct ixgbe_hw *hw, u16 offset,
                                             u16 words, u16 *data);
static s32 ixgbe_write_eeprom_buffer_bit_bang(struct ixgbe_hw *hw, u16 offset,
                                             u16 words, u16 *data);
static s32 ixgbe_detect_eeprom_page_size_generic(struct ixgbe_hw *hw,
                                                 u16 offset);
static s32 ixgbe_disable_pcie_master(struct ixgbe_hw *hw);

/* Base table for registers values that change by MAC */
const u32 ixgbe_mvals_8259X[IXGBE_MVALS_IDX_LIMIT] = {
        IXGBE_MVALS_INIT(8259X)
};

/**
 *  ixgbe_device_supports_autoneg_fc - Check if phy supports autoneg flow
 *  control
 *  @hw: pointer to hardware structure
 *
 *  There are several phys that do not support autoneg flow control. This
 *  function check the device id to see if the associated phy supports
 *  autoneg flow control.
 **/
bool ixgbe_device_supports_autoneg_fc(struct ixgbe_hw *hw)
{
        bool supported = false;
        ixgbe_link_speed speed;
        bool link_up;

        switch (hw->phy.media_type) {
        case ixgbe_media_type_fiber:
                hw->mac.ops.check_link(hw, &speed, &link_up, false);
                /* if link is down, assume supported */
                if (link_up)
                        supported = speed == IXGBE_LINK_SPEED_1GB_FULL ?
                                true : false;
                else
                        supported = true;
                break;
        case ixgbe_media_type_backplane:
                supported = true;
                break;
        case ixgbe_media_type_copper:
                /* only some copper devices support flow control autoneg */
                switch (hw->device_id) {
                case IXGBE_DEV_ID_82599_T3_LOM:
                case IXGBE_DEV_ID_X540T:
                case IXGBE_DEV_ID_X540T1:
                case IXGBE_DEV_ID_X550T:
                case IXGBE_DEV_ID_X550T1:
                case IXGBE_DEV_ID_X550EM_X_10G_T:
                        supported = true;
                        break;
                default:
                        break;
                }
        default:
                break;
        }

        return supported;
}

/**
 *  ixgbe_setup_fc_generic - Set up flow control
 *  @hw: pointer to hardware structure
 *
 *  Called at init time to set up flow control.
 **/
s32 ixgbe_setup_fc_generic(struct ixgbe_hw *hw)
{
        s32 ret_val = 0;
        u32 reg = 0, reg_bp = 0;
        u16 reg_cu = 0;
        bool locked = false;

        /*
         * Validate the requested mode.  Strict IEEE mode does not allow
         * ixgbe_fc_rx_pause because it will cause us to fail at UNH.
         */
        if (hw->fc.strict_ieee && hw->fc.requested_mode == ixgbe_fc_rx_pause) {
                hw_dbg(hw, "ixgbe_fc_rx_pause not valid in strict IEEE mode\n");
                return IXGBE_ERR_INVALID_LINK_SETTINGS;
        }

        /*
         * 10gig parts do not have a word in the EEPROM to determine the
         * default flow control setting, so we explicitly set it to full.
         */
        if (hw->fc.requested_mode == ixgbe_fc_default)
                hw->fc.requested_mode = ixgbe_fc_full;

        /*
         * Set up the 1G and 10G flow control advertisement registers so the
         * HW will be able to do fc autoneg once the cable is plugged in.  If
         * we link at 10G, the 1G advertisement is harmless and vice versa.
         */
        switch (hw->phy.media_type) {
        case ixgbe_media_type_backplane:
                /* some MAC's need RMW protection on AUTOC */
                ret_val = hw->mac.ops.prot_autoc_read(hw, &locked, &reg_bp);
                if (ret_val)
                        return ret_val;

                /* only backplane uses autoc so fall though */
        case ixgbe_media_type_fiber:
                reg = IXGBE_READ_REG(hw, IXGBE_PCS1GANA);

                break;
        case ixgbe_media_type_copper:
                hw->phy.ops.read_reg(hw, MDIO_AN_ADVERTISE,
                                        MDIO_MMD_AN, &reg_cu);
                break;
        default:
                break;
        }

        /*
         * The possible values of fc.requested_mode are:
         * 0: Flow control is completely disabled
         * 1: Rx flow control is enabled (we can receive pause frames,
         *    but not send pause frames).
         * 2: Tx flow control is enabled (we can send pause frames but
         *    we do not support receiving pause frames).
         * 3: Both Rx and Tx flow control (symmetric) are enabled.
         * other: Invalid.
         */
        switch (hw->fc.requested_mode) {
        case ixgbe_fc_none:
                /* Flow control completely disabled by software override. */
                reg &= ~(IXGBE_PCS1GANA_SYM_PAUSE | IXGBE_PCS1GANA_ASM_PAUSE);
                if (hw->phy.media_type == ixgbe_media_type_backplane)
                        reg_bp &= ~(IXGBE_AUTOC_SYM_PAUSE |
                                    IXGBE_AUTOC_ASM_PAUSE);
                else if (hw->phy.media_type == ixgbe_media_type_copper)
                        reg_cu &= ~(IXGBE_TAF_SYM_PAUSE | IXGBE_TAF_ASM_PAUSE);
                break;
        case ixgbe_fc_tx_pause:
                /*
                 * Tx Flow control is enabled, and Rx Flow control is
                 * disabled by software override.
                 */
                reg |= IXGBE_PCS1GANA_ASM_PAUSE;
                reg &= ~IXGBE_PCS1GANA_SYM_PAUSE;
                if (hw->phy.media_type == ixgbe_media_type_backplane) {
                        reg_bp |= IXGBE_AUTOC_ASM_PAUSE;
                        reg_bp &= ~IXGBE_AUTOC_SYM_PAUSE;
                } else if (hw->phy.media_type == ixgbe_media_type_copper) {
                        reg_cu |= IXGBE_TAF_ASM_PAUSE;
                        reg_cu &= ~IXGBE_TAF_SYM_PAUSE;
                }
                break;
        case ixgbe_fc_rx_pause:
                /*
                 * Rx Flow control is enabled and Tx Flow control is
                 * disabled by software override. Since there really
                 * isn't a way to advertise that we are capable of RX
                 * Pause ONLY, we will advertise that we support both
                 * symmetric and asymmetric Rx PAUSE, as such we fall
                 * through to the fc_full statement.  Later, we will
                 * disable the adapter's ability to send PAUSE frames.
                 */
        case ixgbe_fc_full:
                /* Flow control (both Rx and Tx) is enabled by SW override. */
                reg |= IXGBE_PCS1GANA_SYM_PAUSE | IXGBE_PCS1GANA_ASM_PAUSE;
                if (hw->phy.media_type == ixgbe_media_type_backplane)
                        reg_bp |= IXGBE_AUTOC_SYM_PAUSE |
                                  IXGBE_AUTOC_ASM_PAUSE;
                else if (hw->phy.media_type == ixgbe_media_type_copper)
                        reg_cu |= IXGBE_TAF_SYM_PAUSE | IXGBE_TAF_ASM_PAUSE;
                break;
        default:
                hw_dbg(hw, "Flow control param set incorrectly\n");
                return IXGBE_ERR_CONFIG;
        }

        if (hw->mac.type != ixgbe_mac_X540) {
                /*
                 * Enable auto-negotiation between the MAC & PHY;
                 * the MAC will advertise clause 37 flow control.
                 */
                IXGBE_WRITE_REG(hw, IXGBE_PCS1GANA, reg);
                reg = IXGBE_READ_REG(hw, IXGBE_PCS1GLCTL);

                /* Disable AN timeout */
                if (hw->fc.strict_ieee)
                        reg &= ~IXGBE_PCS1GLCTL_AN_1G_TIMEOUT_EN;

                IXGBE_WRITE_REG(hw, IXGBE_PCS1GLCTL, reg);
                hw_dbg(hw, "Set up FC; PCS1GLCTL = 0x%08X\n", reg);
        }

        /*
         * AUTOC restart handles negotiation of 1G and 10G on backplane
         * and copper. There is no need to set the PCS1GCTL register.
         *
         */
        if (hw->phy.media_type == ixgbe_media_type_backplane) {
                /* Need the SW/FW semaphore around AUTOC writes if 82599 and
                 * LESM is on, likewise reset_pipeline requries the lock as
                 * it also writes AUTOC.
                 */
                ret_val = hw->mac.ops.prot_autoc_write(hw, reg_bp, locked);
                if (ret_val)
                        return ret_val;

        } else if ((hw->phy.media_type == ixgbe_media_type_copper) &&
                   ixgbe_device_supports_autoneg_fc(hw)) {
                hw->phy.ops.write_reg(hw, MDIO_AN_ADVERTISE,
                                      MDIO_MMD_AN, reg_cu);
        }

        hw_dbg(hw, "Set up FC; IXGBE_AUTOC = 0x%08X\n", reg);
        return ret_val;
}

/**
 *  ixgbe_start_hw_generic - Prepare hardware for Tx/Rx
 *  @hw: pointer to hardware structure
 *
 *  Starts the hardware by filling the bus info structure and media type, clears
 *  all on chip counters, initializes receive address registers, multicast
 *  table, VLAN filter table, calls routine to set up link and flow control
 *  settings, and leaves transmit and receive units disabled and uninitialized
 **/
s32 ixgbe_start_hw_generic(struct ixgbe_hw *hw)
{
        s32 ret_val;
        u32 ctrl_ext;
        u16 device_caps;

        /* Set the media type */
        hw->phy.media_type = hw->mac.ops.get_media_type(hw);

        /* Identify the PHY */
        hw->phy.ops.identify(hw);

        /* Clear the VLAN filter table */
        hw->mac.ops.clear_vfta(hw);

        /* Clear statistics registers */
        hw->mac.ops.clear_hw_cntrs(hw);

        /* Set No Snoop Disable */
        ctrl_ext = IXGBE_READ_REG(hw, IXGBE_CTRL_EXT);
        ctrl_ext |= IXGBE_CTRL_EXT_NS_DIS;
        IXGBE_WRITE_REG(hw, IXGBE_CTRL_EXT, ctrl_ext);
        IXGBE_WRITE_FLUSH(hw);

        /* Setup flow control */
        ret_val = hw->mac.ops.setup_fc(hw);
        if (ret_val)
                return ret_val;

        /* Cashe bit indicating need for crosstalk fix */
        switch (hw->mac.type) {
        case ixgbe_mac_82599EB:
        case ixgbe_mac_X550EM_x:
        case ixgbe_mac_x550em_a:
                hw->mac.ops.get_device_caps(hw, &device_caps);
                if (device_caps & IXGBE_DEVICE_CAPS_NO_CROSSTALK_WR)
                        hw->need_crosstalk_fix = false;
                else
                        hw->need_crosstalk_fix = true;
                break;
        default:
                hw->need_crosstalk_fix = false;
                break;
        }

        /* Clear adapter stopped flag */
        hw->adapter_stopped = false;

        return 0;
}

/**
 *  ixgbe_start_hw_gen2 - Init sequence for common device family
 *  @hw: pointer to hw structure
 *
 * Performs the init sequence common to the second generation
 * of 10 GbE devices.
 * Devices in the second generation:
 *     82599
 *     X540
 **/
s32 ixgbe_start_hw_gen2(struct ixgbe_hw *hw)
{
        u32 i;

        /* Clear the rate limiters */
        for (i = 0; i < hw->mac.max_tx_queues; i++) {
                IXGBE_WRITE_REG(hw, IXGBE_RTTDQSEL, i);
                IXGBE_WRITE_REG(hw, IXGBE_RTTBCNRC, 0);
        }
        IXGBE_WRITE_FLUSH(hw);

#ifndef CONFIG_SPARC
        /* Disable relaxed ordering */
        for (i = 0; i < hw->mac.max_tx_queues; i++) {
                u32 regval;

                regval = IXGBE_READ_REG(hw, IXGBE_DCA_TXCTRL_82599(i));
                regval &= ~IXGBE_DCA_TXCTRL_DESC_WRO_EN;
                IXGBE_WRITE_REG(hw, IXGBE_DCA_TXCTRL_82599(i), regval);
        }

        for (i = 0; i < hw->mac.max_rx_queues; i++) {
                u32 regval;

                regval = IXGBE_READ_REG(hw, IXGBE_DCA_RXCTRL(i));
                regval &= ~(IXGBE_DCA_RXCTRL_DATA_WRO_EN |
                            IXGBE_DCA_RXCTRL_HEAD_WRO_EN);
                IXGBE_WRITE_REG(hw, IXGBE_DCA_RXCTRL(i), regval);
        }
#endif
        return 0;
}

/**
 *  ixgbe_init_hw_generic - Generic hardware initialization
 *  @hw: pointer to hardware structure
 *
 *  Initialize the hardware by resetting the hardware, filling the bus info
 *  structure and media type, clears all on chip counters, initializes receive
 *  address registers, multicast table, VLAN filter table, calls routine to set
 *  up link and flow control settings, and leaves transmit and receive units
 *  disabled and uninitialized
 **/
s32 ixgbe_init_hw_generic(struct ixgbe_hw *hw)
{
        s32 status;

        /* Reset the hardware */
        status = hw->mac.ops.reset_hw(hw);

        if (status == 0) {
                /* Start the HW */
                status = hw->mac.ops.start_hw(hw);
        }

        return status;
}

/**
 *  ixgbe_clear_hw_cntrs_generic - Generic clear hardware counters
 *  @hw: pointer to hardware structure
 *
 *  Clears all hardware statistics counters by reading them from the hardware
 *  Statistics counters are clear on read.
 **/
s32 ixgbe_clear_hw_cntrs_generic(struct ixgbe_hw *hw)
{
        u16 i = 0;

        IXGBE_READ_REG(hw, IXGBE_CRCERRS);
        IXGBE_READ_REG(hw, IXGBE_ILLERRC);
        IXGBE_READ_REG(hw, IXGBE_ERRBC);
        IXGBE_READ_REG(hw, IXGBE_MSPDC);
        for (i = 0; i < 8; i++)
                IXGBE_READ_REG(hw, IXGBE_MPC(i));

        IXGBE_READ_REG(hw, IXGBE_MLFC);
        IXGBE_READ_REG(hw, IXGBE_MRFC);
        IXGBE_READ_REG(hw, IXGBE_RLEC);
        IXGBE_READ_REG(hw, IXGBE_LXONTXC);
        IXGBE_READ_REG(hw, IXGBE_LXOFFTXC);
        if (hw->mac.type >= ixgbe_mac_82599EB) {
                IXGBE_READ_REG(hw, IXGBE_LXONRXCNT);
                IXGBE_READ_REG(hw, IXGBE_LXOFFRXCNT);
        } else {
                IXGBE_READ_REG(hw, IXGBE_LXONRXC);
                IXGBE_READ_REG(hw, IXGBE_LXOFFRXC);
        }

        for (i = 0; i < 8; i++) {
                IXGBE_READ_REG(hw, IXGBE_PXONTXC(i));
                IXGBE_READ_REG(hw, IXGBE_PXOFFTXC(i));
                if (hw->mac.type >= ixgbe_mac_82599EB) {
                        IXGBE_READ_REG(hw, IXGBE_PXONRXCNT(i));
                        IXGBE_READ_REG(hw, IXGBE_PXOFFRXCNT(i));
                } else {
                        IXGBE_READ_REG(hw, IXGBE_PXONRXC(i));
                        IXGBE_READ_REG(hw, IXGBE_PXOFFRXC(i));
                }
        }
        if (hw->mac.type >= ixgbe_mac_82599EB)
                for (i = 0; i < 8; i++)
                        IXGBE_READ_REG(hw, IXGBE_PXON2OFFCNT(i));
        IXGBE_READ_REG(hw, IXGBE_PRC64);
        IXGBE_READ_REG(hw, IXGBE_PRC127);
        IXGBE_READ_REG(hw, IXGBE_PRC255);
        IXGBE_READ_REG(hw, IXGBE_PRC511);
        IXGBE_READ_REG(hw, IXGBE_PRC1023);
        IXGBE_READ_REG(hw, IXGBE_PRC1522);
        IXGBE_READ_REG(hw, IXGBE_GPRC);
        IXGBE_READ_REG(hw, IXGBE_BPRC);
        IXGBE_READ_REG(hw, IXGBE_MPRC);
        IXGBE_READ_REG(hw, IXGBE_GPTC);
        IXGBE_READ_REG(hw, IXGBE_GORCL);
        IXGBE_READ_REG(hw, IXGBE_GORCH);
        IXGBE_READ_REG(hw, IXGBE_GOTCL);
        IXGBE_READ_REG(hw, IXGBE_GOTCH);
        if (hw->mac.type == ixgbe_mac_82598EB)
                for (i = 0; i < 8; i++)
                        IXGBE_READ_REG(hw, IXGBE_RNBC(i));
        IXGBE_READ_REG(hw, IXGBE_RUC);
        IXGBE_READ_REG(hw, IXGBE_RFC);
        IXGBE_READ_REG(hw, IXGBE_ROC);
        IXGBE_READ_REG(hw, IXGBE_RJC);
        IXGBE_READ_REG(hw, IXGBE_MNGPRC);
        IXGBE_READ_REG(hw, IXGBE_MNGPDC);
        IXGBE_READ_REG(hw, IXGBE_MNGPTC);
        IXGBE_READ_REG(hw, IXGBE_TORL);
        IXGBE_READ_REG(hw, IXGBE_TORH);
        IXGBE_READ_REG(hw, IXGBE_TPR);
        IXGBE_READ_REG(hw, IXGBE_TPT);
        IXGBE_READ_REG(hw, IXGBE_PTC64);
        IXGBE_READ_REG(hw, IXGBE_PTC127);
        IXGBE_READ_REG(hw, IXGBE_PTC255);
        IXGBE_READ_REG(hw, IXGBE_PTC511);
        IXGBE_READ_REG(hw, IXGBE_PTC1023);
        IXGBE_READ_REG(hw, IXGBE_PTC1522);
        IXGBE_READ_REG(hw, IXGBE_MPTC);
        IXGBE_READ_REG(hw, IXGBE_BPTC);
        for (i = 0; i < 16; i++) {
                IXGBE_READ_REG(hw, IXGBE_QPRC(i));
                IXGBE_READ_REG(hw, IXGBE_QPTC(i));
                if (hw->mac.type >= ixgbe_mac_82599EB) {
                        IXGBE_READ_REG(hw, IXGBE_QBRC_L(i));
                        IXGBE_READ_REG(hw, IXGBE_QBRC_H(i));
                        IXGBE_READ_REG(hw, IXGBE_QBTC_L(i));
                        IXGBE_READ_REG(hw, IXGBE_QBTC_H(i));
                        IXGBE_READ_REG(hw, IXGBE_QPRDC(i));
                } else {
                        IXGBE_READ_REG(hw, IXGBE_QBRC(i));
                        IXGBE_READ_REG(hw, IXGBE_QBTC(i));
                }
        }

        if (hw->mac.type == ixgbe_mac_X550 || hw->mac.type == ixgbe_mac_X540) {
                if (hw->phy.id == 0)
                        hw->phy.ops.identify(hw);
                hw->phy.ops.read_reg(hw, IXGBE_PCRC8ECL, MDIO_MMD_PCS, &i);
                hw->phy.ops.read_reg(hw, IXGBE_PCRC8ECH, MDIO_MMD_PCS, &i);
                hw->phy.ops.read_reg(hw, IXGBE_LDPCECL, MDIO_MMD_PCS, &i);
                hw->phy.ops.read_reg(hw, IXGBE_LDPCECH, MDIO_MMD_PCS, &i);
        }

        return 0;
}

/**
 *  ixgbe_read_pba_string_generic - Reads part number string from EEPROM
 *  @hw: pointer to hardware structure
 *  @pba_num: stores the part number string from the EEPROM
 *  @pba_num_size: part number string buffer length
 *
 *  Reads the part number string from the EEPROM.
 **/
s32 ixgbe_read_pba_string_generic(struct ixgbe_hw *hw, u8 *pba_num,
                                  u32 pba_num_size)
{
        s32 ret_val;
        u16 data;
        u16 pba_ptr;
        u16 offset;
        u16 length;

        if (pba_num == NULL) {
                hw_dbg(hw, "PBA string buffer was null\n");
                return IXGBE_ERR_INVALID_ARGUMENT;
        }

        ret_val = hw->eeprom.ops.read(hw, IXGBE_PBANUM0_PTR, &data);
        if (ret_val) {
                hw_dbg(hw, "NVM Read Error\n");
                return ret_val;
        }

        ret_val = hw->eeprom.ops.read(hw, IXGBE_PBANUM1_PTR, &pba_ptr);
        if (ret_val) {
                hw_dbg(hw, "NVM Read Error\n");
                return ret_val;
        }

        /*
         * if data is not ptr guard the PBA must be in legacy format which
         * means pba_ptr is actually our second data word for the PBA number
         * and we can decode it into an ascii string
         */
        if (data != IXGBE_PBANUM_PTR_GUARD) {
                hw_dbg(hw, "NVM PBA number is not stored as string\n");

                /* we will need 11 characters to store the PBA */
                if (pba_num_size < 11) {
                        hw_dbg(hw, "PBA string buffer too small\n");
                        return IXGBE_ERR_NO_SPACE;
                }

                /* extract hex string from data and pba_ptr */
                pba_num[0] = (data >> 12) & 0xF;
                pba_num[1] = (data >> 8) & 0xF;
                pba_num[2] = (data >> 4) & 0xF;
                pba_num[3] = data & 0xF;
                pba_num[4] = (pba_ptr >> 12) & 0xF;
                pba_num[5] = (pba_ptr >> 8) & 0xF;
                pba_num[6] = '-';
                pba_num[7] = 0;
                pba_num[8] = (pba_ptr >> 4) & 0xF;
                pba_num[9] = pba_ptr & 0xF;

                /* put a null character on the end of our string */
                pba_num[10] = '\0';

                /* switch all the data but the '-' to hex char */
                for (offset = 0; offset < 10; offset++) {
                        if (pba_num[offset] < 0xA)
                                pba_num[offset] += '0';
                        else if (pba_num[offset] < 0x10)
                                pba_num[offset] += 'A' - 0xA;
                }

                return 0;
        }

        ret_val = hw->eeprom.ops.read(hw, pba_ptr, &length);
        if (ret_val) {
                hw_dbg(hw, "NVM Read Error\n");
                return ret_val;
        }

        if (length == 0xFFFF || length == 0) {
                hw_dbg(hw, "NVM PBA number section invalid length\n");
                return IXGBE_ERR_PBA_SECTION;
        }

        /* check if pba_num buffer is big enough */
        if (pba_num_size  < (((u32)length * 2) - 1)) {
                hw_dbg(hw, "PBA string buffer too small\n");
                return IXGBE_ERR_NO_SPACE;
        }

        /* trim pba length from start of string */
        pba_ptr++;
        length--;

        for (offset = 0; offset < length; offset++) {
                ret_val = hw->eeprom.ops.read(hw, pba_ptr + offset, &data);
                if (ret_val) {
                        hw_dbg(hw, "NVM Read Error\n");
                        return ret_val;
                }
                pba_num[offset * 2] = (u8)(data >> 8);
                pba_num[(offset * 2) + 1] = (u8)(data & 0xFF);
        }
        pba_num[offset * 2] = '\0';

        return 0;
}

/**
 *  ixgbe_get_mac_addr_generic - Generic get MAC address
 *  @hw: pointer to hardware structure
 *  @mac_addr: Adapter MAC address
 *
 *  Reads the adapter's MAC address from first Receive Address Register (RAR0)
 *  A reset of the adapter must be performed prior to calling this function
 *  in order for the MAC address to have been loaded from the EEPROM into RAR0
 **/
s32 ixgbe_get_mac_addr_generic(struct ixgbe_hw *hw, u8 *mac_addr)
{
        u32 rar_high;
        u32 rar_low;
        u16 i;

        rar_high = IXGBE_READ_REG(hw, IXGBE_RAH(0));
        rar_low = IXGBE_READ_REG(hw, IXGBE_RAL(0));

        for (i = 0; i < 4; i++)
                mac_addr[i] = (u8)(rar_low >> (i*8));

        for (i = 0; i < 2; i++)
                mac_addr[i+4] = (u8)(rar_high >> (i*8));

        return 0;
}

enum ixgbe_bus_width ixgbe_convert_bus_width(u16 link_status)
{
        switch (link_status & IXGBE_PCI_LINK_WIDTH) {
        case IXGBE_PCI_LINK_WIDTH_1:
                return ixgbe_bus_width_pcie_x1;
        case IXGBE_PCI_LINK_WIDTH_2:
                return ixgbe_bus_width_pcie_x2;
        case IXGBE_PCI_LINK_WIDTH_4:
                return ixgbe_bus_width_pcie_x4;
        case IXGBE_PCI_LINK_WIDTH_8:
                return ixgbe_bus_width_pcie_x8;
        default:
                return ixgbe_bus_width_unknown;
        }
}

enum ixgbe_bus_speed ixgbe_convert_bus_speed(u16 link_status)
{
        switch (link_status & IXGBE_PCI_LINK_SPEED) {
        case IXGBE_PCI_LINK_SPEED_2500:
                return ixgbe_bus_speed_2500;
        case IXGBE_PCI_LINK_SPEED_5000:
                return ixgbe_bus_speed_5000;
        case IXGBE_PCI_LINK_SPEED_8000:
                return ixgbe_bus_speed_8000;
        default:
                return ixgbe_bus_speed_unknown;
        }
}

/**
 *  ixgbe_get_bus_info_generic - Generic set PCI bus info
 *  @hw: pointer to hardware structure
 *
 *  Sets the PCI bus info (speed, width, type) within the ixgbe_hw structure
 **/
s32 ixgbe_get_bus_info_generic(struct ixgbe_hw *hw)
{
        u16 link_status;

        hw->bus.type = ixgbe_bus_type_pci_express;

        /* Get the negotiated link width and speed from PCI config space */
        link_status = ixgbe_read_pci_cfg_word(hw, IXGBE_PCI_LINK_STATUS);

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

        hw->mac.ops.set_lan_id(hw);

        return 0;
}

/**
 *  ixgbe_set_lan_id_multi_port_pcie - Set LAN id for PCIe multiple port devices
 *  @hw: pointer to the HW structure
 *
 *  Determines the LAN function id by reading memory-mapped registers
 *  and swaps the port value if requested.
 **/
void ixgbe_set_lan_id_multi_port_pcie(struct ixgbe_hw *hw)
{
        struct ixgbe_bus_info *bus = &hw->bus;
        u16 ee_ctrl_4;
        u32 reg;

        reg = IXGBE_READ_REG(hw, IXGBE_STATUS);
        bus->func = (reg & IXGBE_STATUS_LAN_ID) >> IXGBE_STATUS_LAN_ID_SHIFT;
        bus->lan_id = bus->func;

        /* check for a port swap */
        reg = IXGBE_READ_REG(hw, IXGBE_FACTPS(hw));
        if (reg & IXGBE_FACTPS_LFS)
                bus->func ^= 0x1;

        /* Get MAC instance from EEPROM for configuring CS4227 */
        if (hw->device_id == IXGBE_DEV_ID_X550EM_A_SFP) {
                hw->eeprom.ops.read(hw, IXGBE_EEPROM_CTRL_4, &ee_ctrl_4);
                bus->instance_id = (ee_ctrl_4 & IXGBE_EE_CTRL_4_INST_ID) >>
                                   IXGBE_EE_CTRL_4_INST_ID_SHIFT;
        }
}

/**
 *  ixgbe_stop_adapter_generic - Generic stop Tx/Rx units
 *  @hw: pointer to hardware structure
 *
 *  Sets the adapter_stopped flag within ixgbe_hw struct. Clears interrupts,
 *  disables transmit and receive units. The adapter_stopped flag is used by
 *  the shared code and drivers to determine if the adapter is in a stopped
 *  state and should not touch the hardware.
 **/
s32 ixgbe_stop_adapter_generic(struct ixgbe_hw *hw)
{
        u32 reg_val;
        u16 i;

        /*
         * Set the adapter_stopped flag so other driver functions stop touching
         * the hardware
         */
        hw->adapter_stopped = true;

        /* Disable the receive unit */
        hw->mac.ops.disable_rx(hw);

        /* Clear interrupt mask to stop interrupts from being generated */
        IXGBE_WRITE_REG(hw, IXGBE_EIMC, IXGBE_IRQ_CLEAR_MASK);

        /* Clear any pending interrupts, flush previous writes */
        IXGBE_READ_REG(hw, IXGBE_EICR);

        /* Disable the transmit unit.  Each queue must be disabled. */
        for (i = 0; i < hw->mac.max_tx_queues; i++)
                IXGBE_WRITE_REG(hw, IXGBE_TXDCTL(i), IXGBE_TXDCTL_SWFLSH);

        /* Disable the receive unit by stopping each queue */
        for (i = 0; i < hw->mac.max_rx_queues; i++) {
                reg_val = IXGBE_READ_REG(hw, IXGBE_RXDCTL(i));
                reg_val &= ~IXGBE_RXDCTL_ENABLE;
                reg_val |= IXGBE_RXDCTL_SWFLSH;
                IXGBE_WRITE_REG(hw, IXGBE_RXDCTL(i), reg_val);
        }

        /* flush all queues disables */
        IXGBE_WRITE_FLUSH(hw);
        usleep_range(1000, 2000);

        /*
         * Prevent the PCI-E bus from from hanging by disabling PCI-E master
         * access and verify no pending requests
         */
        return ixgbe_disable_pcie_master(hw);
}

/**
 *  ixgbe_led_on_generic - Turns on the software controllable LEDs.
 *  @hw: pointer to hardware structure
 *  @index: led number to turn on
 **/
s32 ixgbe_led_on_generic(struct ixgbe_hw *hw, u32 index)
{
        u32 led_reg = IXGBE_READ_REG(hw, IXGBE_LEDCTL);

        if (index > 3)
                return IXGBE_ERR_PARAM;

        /* To turn on the LED, set mode to ON. */
        led_reg &= ~IXGBE_LED_MODE_MASK(index);
        led_reg |= IXGBE_LED_ON << IXGBE_LED_MODE_SHIFT(index);
        IXGBE_WRITE_REG(hw, IXGBE_LEDCTL, led_reg);
        IXGBE_WRITE_FLUSH(hw);

        return 0;
}

/**
 *  ixgbe_led_off_generic - Turns off the software controllable LEDs.
 *  @hw: pointer to hardware structure
 *  @index: led number to turn off
 **/
s32 ixgbe_led_off_generic(struct ixgbe_hw *hw, u32 index)
{
        u32 led_reg = IXGBE_READ_REG(hw, IXGBE_LEDCTL);

        if (index > 3)
                return IXGBE_ERR_PARAM;

        /* To turn off the LED, set mode to OFF. */
        led_reg &= ~IXGBE_LED_MODE_MASK(index);
        led_reg |= IXGBE_LED_OFF << IXGBE_LED_MODE_SHIFT(index);
        IXGBE_WRITE_REG(hw, IXGBE_LEDCTL, led_reg);
        IXGBE_WRITE_FLUSH(hw);

        return 0;
}

/**
 *  ixgbe_init_eeprom_params_generic - Initialize EEPROM params
 *  @hw: pointer to hardware structure
 *
 *  Initializes the EEPROM parameters ixgbe_eeprom_info within the
 *  ixgbe_hw struct in order to set up EEPROM access.
 **/
s32 ixgbe_init_eeprom_params_generic(struct ixgbe_hw *hw)
{
        struct ixgbe_eeprom_info *eeprom = &hw->eeprom;
        u32 eec;
        u16 eeprom_size;

        if (eeprom->type == ixgbe_eeprom_uninitialized) {
                eeprom->type = ixgbe_eeprom_none;
                /* Set default semaphore delay to 10ms which is a well
                 * tested value */
                eeprom->semaphore_delay = 10;
                /* Clear EEPROM page size, it will be initialized as needed */
                eeprom->word_page_size = 0;

                /*
                 * Check for EEPROM present first.
                 * If not present leave as none
                 */
                eec = IXGBE_READ_REG(hw, IXGBE_EEC(hw));
                if (eec & IXGBE_EEC_PRES) {
                        eeprom->type = ixgbe_eeprom_spi;

                        /*
                         * SPI EEPROM is assumed here.  This code would need to
                         * change if a future EEPROM is not SPI.
                         */
                        eeprom_size = (u16)((eec & IXGBE_EEC_SIZE) >>
                                            IXGBE_EEC_SIZE_SHIFT);
                        eeprom->word_size = BIT(eeprom_size +
                                                 IXGBE_EEPROM_WORD_SIZE_SHIFT);
                }

                if (eec & IXGBE_EEC_ADDR_SIZE)
                        eeprom->address_bits = 16;
                else
                        eeprom->address_bits = 8;
                hw_dbg(hw, "Eeprom params: type = %d, size = %d, address bits: %d\n",
                       eeprom->type, eeprom->word_size, eeprom->address_bits);
        }

        return 0;
}

/**
 *  ixgbe_write_eeprom_buffer_bit_bang_generic - Write EEPROM using bit-bang
 *  @hw: pointer to hardware structure
 *  @offset: offset within the EEPROM to write
 *  @words: number of words
 *  @data: 16 bit word(s) to write to EEPROM
 *
 *  Reads 16 bit word(s) from EEPROM through bit-bang method
 **/
s32 ixgbe_write_eeprom_buffer_bit_bang_generic(struct ixgbe_hw *hw, u16 offset,
                                               u16 words, u16 *data)
{
        s32 status;
        u16 i, count;

        hw->eeprom.ops.init_params(hw);

        if (words == 0)
                return IXGBE_ERR_INVALID_ARGUMENT;

        if (offset + words > hw->eeprom.word_size)
                return IXGBE_ERR_EEPROM;

        /*
         * The EEPROM page size cannot be queried from the chip. We do lazy
         * initialization. It is worth to do that when we write large buffer.
         */
        if ((hw->eeprom.word_page_size == 0) &&
            (words > IXGBE_EEPROM_PAGE_SIZE_MAX))
                ixgbe_detect_eeprom_page_size_generic(hw, offset);

        /*
         * We cannot hold synchronization semaphores for too long
         * to avoid other entity starvation. However it is more efficient
         * to read in bursts than synchronizing access for each word.
         */
        for (i = 0; i < words; i += IXGBE_EEPROM_RD_BUFFER_MAX_COUNT) {
                count = (words - i) / IXGBE_EEPROM_RD_BUFFER_MAX_COUNT > 0 ?
                         IXGBE_EEPROM_RD_BUFFER_MAX_COUNT : (words - i);
                status = ixgbe_write_eeprom_buffer_bit_bang(hw, offset + i,
                                                            count, &data[i]);

                if (status != 0)
                        break;
        }

        return status;
}

/**
 *  ixgbe_write_eeprom_buffer_bit_bang - Writes 16 bit word(s) to EEPROM
 *  @hw: pointer to hardware structure
 *  @offset: offset within the EEPROM to be written to
 *  @words: number of word(s)
 *  @data: 16 bit word(s) to be written to the EEPROM
 *
 *  If ixgbe_eeprom_update_checksum is not called after this function, the
 *  EEPROM will most likely contain an invalid checksum.
 **/
static s32 ixgbe_write_eeprom_buffer_bit_bang(struct ixgbe_hw *hw, u16 offset,
                                              u16 words, u16 *data)
{
        s32 status;
        u16 word;
        u16 page_size;
        u16 i;
        u8 write_opcode = IXGBE_EEPROM_WRITE_OPCODE_SPI;

        /* Prepare the EEPROM for writing  */
        status = ixgbe_acquire_eeprom(hw);
        if (status)
                return status;

        if (ixgbe_ready_eeprom(hw) != 0) {
                ixgbe_release_eeprom(hw);
                return IXGBE_ERR_EEPROM;
        }

        for (i = 0; i < words; i++) {
                ixgbe_standby_eeprom(hw);

                /* Send the WRITE ENABLE command (8 bit opcode) */
                ixgbe_shift_out_eeprom_bits(hw,
                                            IXGBE_EEPROM_WREN_OPCODE_SPI,
                                            IXGBE_EEPROM_OPCODE_BITS);

                ixgbe_standby_eeprom(hw);

                /* Some SPI eeproms use the 8th address bit embedded
                 * in the opcode
                 */
                if ((hw->eeprom.address_bits == 8) &&
                    ((offset + i) >= 128))
                        write_opcode |= IXGBE_EEPROM_A8_OPCODE_SPI;

                /* Send the Write command (8-bit opcode + addr) */
                ixgbe_shift_out_eeprom_bits(hw, write_opcode,
                                            IXGBE_EEPROM_OPCODE_BITS);
                ixgbe_shift_out_eeprom_bits(hw, (u16)((offset + i) * 2),
                                            hw->eeprom.address_bits);

                page_size = hw->eeprom.word_page_size;

                /* Send the data in burst via SPI */
                do {
                        word = data[i];
                        word = (word >> 8) | (word << 8);
                        ixgbe_shift_out_eeprom_bits(hw, word, 16);

                        if (page_size == 0)
                                break;

                        /* do not wrap around page */
                        if (((offset + i) & (page_size - 1)) ==
                            (page_size - 1))
                                break;
                } while (++i < words);

                ixgbe_standby_eeprom(hw);
                usleep_range(10000, 20000);
        }
        /* Done with writing - release the EEPROM */
        ixgbe_release_eeprom(hw);

        return 0;
}

/**
 *  ixgbe_write_eeprom_generic - Writes 16 bit value to EEPROM
 *  @hw: pointer to hardware structure
 *  @offset: offset within the EEPROM to be written to
 *  @data: 16 bit word to be written to the EEPROM
 *
 *  If ixgbe_eeprom_update_checksum is not called after this function, the
 *  EEPROM will most likely contain an invalid checksum.
 **/
s32 ixgbe_write_eeprom_generic(struct ixgbe_hw *hw, u16 offset, u16 data)
{
        hw->eeprom.ops.init_params(hw);

        if (offset >= hw->eeprom.word_size)
                return IXGBE_ERR_EEPROM;

        return ixgbe_write_eeprom_buffer_bit_bang(hw, offset, 1, &data);
}

/**
 *  ixgbe_read_eeprom_buffer_bit_bang_generic - Read EEPROM using bit-bang
 *  @hw: pointer to hardware structure
 *  @offset: offset within the EEPROM to be read
 *  @words: number of word(s)
 *  @data: read 16 bit words(s) from EEPROM
 *
 *  Reads 16 bit word(s) from EEPROM through bit-bang method
 **/
s32 ixgbe_read_eeprom_buffer_bit_bang_generic(struct ixgbe_hw *hw, u16 offset,
                                              u16 words, u16 *data)
{
        s32 status;
        u16 i, count;

        hw->eeprom.ops.init_params(hw);

        if (words == 0)
                return IXGBE_ERR_INVALID_ARGUMENT;

        if (offset + words > hw->eeprom.word_size)
                return IXGBE_ERR_EEPROM;

        /*
         * We cannot hold synchronization semaphores for too long
         * to avoid other entity starvation. However it is more efficient
         * to read in bursts than synchronizing access for each word.
         */
        for (i = 0; i < words; i += IXGBE_EEPROM_RD_BUFFER_MAX_COUNT) {
                count = (words - i) / IXGBE_EEPROM_RD_BUFFER_MAX_COUNT > 0 ?
                         IXGBE_EEPROM_RD_BUFFER_MAX_COUNT : (words - i);

                status = ixgbe_read_eeprom_buffer_bit_bang(hw, offset + i,
                                                           count, &data[i]);

                if (status)
                        return status;
        }

        return 0;
}

/**
 *  ixgbe_read_eeprom_buffer_bit_bang - Read EEPROM using bit-bang
 *  @hw: pointer to hardware structure
 *  @offset: offset within the EEPROM to be read
 *  @words: number of word(s)
 *  @data: read 16 bit word(s) from EEPROM
 *
 *  Reads 16 bit word(s) from EEPROM through bit-bang method
 **/
static s32 ixgbe_read_eeprom_buffer_bit_bang(struct ixgbe_hw *hw, u16 offset,
                                             u16 words, u16 *data)
{
        s32 status;
        u16 word_in;
        u8 read_opcode = IXGBE_EEPROM_READ_OPCODE_SPI;
        u16 i;

        /* Prepare the EEPROM for reading  */
        status = ixgbe_acquire_eeprom(hw);
        if (status)
                return status;

        if (ixgbe_ready_eeprom(hw) != 0) {
                ixgbe_release_eeprom(hw);
                return IXGBE_ERR_EEPROM;
        }

        for (i = 0; i < words; i++) {
                ixgbe_standby_eeprom(hw);
                /* Some SPI eeproms use the 8th address bit embedded
                 * in the opcode
                 */
                if ((hw->eeprom.address_bits == 8) &&
                    ((offset + i) >= 128))
                        read_opcode |= IXGBE_EEPROM_A8_OPCODE_SPI;

                /* Send the READ command (opcode + addr) */
                ixgbe_shift_out_eeprom_bits(hw, read_opcode,
                                            IXGBE_EEPROM_OPCODE_BITS);
                ixgbe_shift_out_eeprom_bits(hw, (u16)((offset + i) * 2),
                                            hw->eeprom.address_bits);

                /* Read the data. */
                word_in = ixgbe_shift_in_eeprom_bits(hw, 16);
                data[i] = (word_in >> 8) | (word_in << 8);
        }

        /* End this read operation */
        ixgbe_release_eeprom(hw);

        return 0;
}

/**
 *  ixgbe_read_eeprom_bit_bang_generic - Read EEPROM word using bit-bang
 *  @hw: pointer to hardware structure
 *  @offset: offset within the EEPROM to be read
 *  @data: read 16 bit value from EEPROM
 *
 *  Reads 16 bit value from EEPROM through bit-bang method
 **/
s32 ixgbe_read_eeprom_bit_bang_generic(struct ixgbe_hw *hw, u16 offset,
                                       u16 *data)
{
        hw->eeprom.ops.init_params(hw);

        if (offset >= hw->eeprom.word_size)
                return IXGBE_ERR_EEPROM;

        return ixgbe_read_eeprom_buffer_bit_bang(hw, offset, 1, data);
}

/**
 *  ixgbe_read_eerd_buffer_generic - Read EEPROM word(s) using EERD
 *  @hw: pointer to hardware structure
 *  @offset: offset of word in the EEPROM to read
 *  @words: number of word(s)
 *  @data: 16 bit word(s) from the EEPROM
 *
 *  Reads a 16 bit word(s) from the EEPROM using the EERD register.
 **/
s32 ixgbe_read_eerd_buffer_generic(struct ixgbe_hw *hw, u16 offset,
                                   u16 words, u16 *data)
{
        u32 eerd;
        s32 status;
        u32 i;

        hw->eeprom.ops.init_params(hw);

        if (words == 0)
                return IXGBE_ERR_INVALID_ARGUMENT;

        if (offset >= hw->eeprom.word_size)
                return IXGBE_ERR_EEPROM;

        for (i = 0; i < words; i++) {
                eerd = ((offset + i) << IXGBE_EEPROM_RW_ADDR_SHIFT) |
                       IXGBE_EEPROM_RW_REG_START;

                IXGBE_WRITE_REG(hw, IXGBE_EERD, eerd);
                status = ixgbe_poll_eerd_eewr_done(hw, IXGBE_NVM_POLL_READ);

                if (status == 0) {
                        data[i] = (IXGBE_READ_REG(hw, IXGBE_EERD) >>
                                   IXGBE_EEPROM_RW_REG_DATA);
                } else {
                        hw_dbg(hw, "Eeprom read timed out\n");
                        return status;
                }
        }

        return 0;
}

/**
 *  ixgbe_detect_eeprom_page_size_generic - Detect EEPROM page size
 *  @hw: pointer to hardware structure
 *  @offset: offset within the EEPROM to be used as a scratch pad
 *
 *  Discover EEPROM page size by writing marching data at given offset.
 *  This function is called only when we are writing a new large buffer
 *  at given offset so the data would be overwritten anyway.
 **/
static s32 ixgbe_detect_eeprom_page_size_generic(struct ixgbe_hw *hw,
                                                 u16 offset)
{
        u16 data[IXGBE_EEPROM_PAGE_SIZE_MAX];
        s32 status;
        u16 i;

        for (i = 0; i < IXGBE_EEPROM_PAGE_SIZE_MAX; i++)
                data[i] = i;

        hw->eeprom.word_page_size = IXGBE_EEPROM_PAGE_SIZE_MAX;
        status = ixgbe_write_eeprom_buffer_bit_bang(hw, offset,
                                             IXGBE_EEPROM_PAGE_SIZE_MAX, data);
        hw->eeprom.word_page_size = 0;
        if (status)
                return status;

        status = ixgbe_read_eeprom_buffer_bit_bang(hw, offset, 1, data);
        if (status)
                return status;

        /*
         * When writing in burst more than the actual page size
         * EEPROM address wraps around current page.
         */
        hw->eeprom.word_page_size = IXGBE_EEPROM_PAGE_SIZE_MAX - data[0];

        hw_dbg(hw, "Detected EEPROM page size = %d words.\n",
               hw->eeprom.word_page_size);
        return 0;
}

/**
 *  ixgbe_read_eerd_generic - Read EEPROM word using EERD
 *  @hw: pointer to hardware structure
 *  @offset: offset of  word in the EEPROM to read
 *  @data: word read from the EEPROM
 *
 *  Reads a 16 bit word from the EEPROM using the EERD register.
 **/
s32 ixgbe_read_eerd_generic(struct ixgbe_hw *hw, u16 offset, u16 *data)
{
        return ixgbe_read_eerd_buffer_generic(hw, offset, 1, data);
}

/**
 *  ixgbe_write_eewr_buffer_generic - Write EEPROM word(s) using EEWR
 *  @hw: pointer to hardware structure
 *  @offset: offset of  word in the EEPROM to write
 *  @words: number of words
 *  @data: word(s) write to the EEPROM
 *
 *  Write a 16 bit word(s) to the EEPROM using the EEWR register.
 **/
s32 ixgbe_write_eewr_buffer_generic(struct ixgbe_hw *hw, u16 offset,
                                    u16 words, u16 *data)
{
        u32 eewr;
        s32 status;
        u16 i;

        hw->eeprom.ops.init_params(hw);

        if (words == 0)
                return IXGBE_ERR_INVALID_ARGUMENT;

        if (offset >= hw->eeprom.word_size)
                return IXGBE_ERR_EEPROM;

        for (i = 0; i < words; i++) {
                eewr = ((offset + i) << IXGBE_EEPROM_RW_ADDR_SHIFT) |
                       (data[i] << IXGBE_EEPROM_RW_REG_DATA) |
                       IXGBE_EEPROM_RW_REG_START;

                status = ixgbe_poll_eerd_eewr_done(hw, IXGBE_NVM_POLL_WRITE);
                if (status) {
                        hw_dbg(hw, "Eeprom write EEWR timed out\n");
                        return status;
                }

                IXGBE_WRITE_REG(hw, IXGBE_EEWR, eewr);

                status = ixgbe_poll_eerd_eewr_done(hw, IXGBE_NVM_POLL_WRITE);
                if (status) {
                        hw_dbg(hw, "Eeprom write EEWR timed out\n");
                        return status;
                }
        }

        return 0;
}

/**
 *  ixgbe_write_eewr_generic - Write EEPROM word using EEWR
 *  @hw: pointer to hardware structure
 *  @offset: offset of  word in the EEPROM to write
 *  @data: word write to the EEPROM
 *
 *  Write a 16 bit word to the EEPROM using the EEWR register.
 **/
s32 ixgbe_write_eewr_generic(struct ixgbe_hw *hw, u16 offset, u16 data)
{
        return ixgbe_write_eewr_buffer_generic(hw, offset, 1, &data);
}

/**
 *  ixgbe_poll_eerd_eewr_done - Poll EERD read or EEWR write status
 *  @hw: pointer to hardware structure
 *  @ee_reg: EEPROM flag for polling
 *
 *  Polls the status bit (bit 1) of the EERD or EEWR to determine when the
 *  read or write is done respectively.
 **/
static s32 ixgbe_poll_eerd_eewr_done(struct ixgbe_hw *hw, u32 ee_reg)
{
        u32 i;
        u32 reg;

        for (i = 0; i < IXGBE_EERD_EEWR_ATTEMPTS; i++) {
                if (ee_reg == IXGBE_NVM_POLL_READ)
                        reg = IXGBE_READ_REG(hw, IXGBE_EERD);
                else
                        reg = IXGBE_READ_REG(hw, IXGBE_EEWR);

                if (reg & IXGBE_EEPROM_RW_REG_DONE) {
                        return 0;
                }
                udelay(5);
        }
        return IXGBE_ERR_EEPROM;
}

/**
 *  ixgbe_acquire_eeprom - Acquire EEPROM using bit-bang
 *  @hw: pointer to hardware structure
 *
 *  Prepares EEPROM for access using bit-bang method. This function should
 *  be called before issuing a command to the EEPROM.
 **/
static s32 ixgbe_acquire_eeprom(struct ixgbe_hw *hw)
{
        u32 eec;
        u32 i;

        if (hw->mac.ops.acquire_swfw_sync(hw, IXGBE_GSSR_EEP_SM) != 0)
                return IXGBE_ERR_SWFW_SYNC;

        eec = IXGBE_READ_REG(hw, IXGBE_EEC(hw));

        /* Request EEPROM Access */
        eec |= IXGBE_EEC_REQ;
        IXGBE_WRITE_REG(hw, IXGBE_EEC(hw), eec);

        for (i = 0; i < IXGBE_EEPROM_GRANT_ATTEMPTS; i++) {
                eec = IXGBE_READ_REG(hw, IXGBE_EEC(hw));
                if (eec & IXGBE_EEC_GNT)
                        break;
                udelay(5);
        }

        /* Release if grant not acquired */
        if (!(eec & IXGBE_EEC_GNT)) {
                eec &= ~IXGBE_EEC_REQ;
                IXGBE_WRITE_REG(hw, IXGBE_EEC(hw), eec);
                hw_dbg(hw, "Could not acquire EEPROM grant\n");

                hw->mac.ops.release_swfw_sync(hw, IXGBE_GSSR_EEP_SM);
                return IXGBE_ERR_EEPROM;
        }

        /* Setup EEPROM for Read/Write */
        /* Clear CS and SK */
        eec &= ~(IXGBE_EEC_CS | IXGBE_EEC_SK);
        IXGBE_WRITE_REG(hw, IXGBE_EEC(hw), eec);
        IXGBE_WRITE_FLUSH(hw);
        udelay(1);
        return 0;
}

/**
 *  ixgbe_get_eeprom_semaphore - Get hardware semaphore
 *  @hw: pointer to hardware structure
 *
 *  Sets the hardware semaphores so EEPROM access can occur for bit-bang method
 **/
static s32 ixgbe_get_eeprom_semaphore(struct ixgbe_hw *hw)
{
        u32 timeout = 2000;
        u32 i;
        u32 swsm;

        /* Get SMBI software semaphore between device drivers first */
        for (i = 0; i < timeout; i++) {
                /*
                 * If the SMBI bit is 0 when we read it, then the bit will be
                 * set and we have the semaphore
                 */
                swsm = IXGBE_READ_REG(hw, IXGBE_SWSM(hw));
                if (!(swsm & IXGBE_SWSM_SMBI))
                        break;
                usleep_range(50, 100);
        }

        if (i == timeout) {
                hw_dbg(hw, "Driver can't access the Eeprom - SMBI Semaphore not granted.\n");
                /* this release is particularly important because our attempts
                 * above to get the semaphore may have succeeded, and if there
                 * was a timeout, we should unconditionally clear the semaphore
                 * bits to free the driver to make progress
                 */
                ixgbe_release_eeprom_semaphore(hw);

                usleep_range(50, 100);
                /* one last try
                 * If the SMBI bit is 0 when we read it, then the bit will be
                 * set and we have the semaphore
                 */
                swsm = IXGBE_READ_REG(hw, IXGBE_SWSM(hw));
                if (swsm & IXGBE_SWSM_SMBI) {
                        hw_dbg(hw, "Software semaphore SMBI between device drivers not granted.\n");
                        return IXGBE_ERR_EEPROM;
                }
        }

        /* Now get the semaphore between SW/FW through the SWESMBI bit */
        for (i = 0; i < timeout; i++) {
                swsm = IXGBE_READ_REG(hw, IXGBE_SWSM(hw));

                /* Set the SW EEPROM semaphore bit to request access */
                swsm |= IXGBE_SWSM_SWESMBI;
                IXGBE_WRITE_REG(hw, IXGBE_SWSM(hw), swsm);

                /* If we set the bit successfully then we got the
                 * semaphore.
                 */
                swsm = IXGBE_READ_REG(hw, IXGBE_SWSM(hw));
                if (swsm & IXGBE_SWSM_SWESMBI)
                        break;

                usleep_range(50, 100);
        }

        /* Release semaphores and return error if SW EEPROM semaphore
         * was not granted because we don't have access to the EEPROM
         */
        if (i >= timeout) {
                hw_dbg(hw, "SWESMBI Software EEPROM semaphore not granted.\n");
                ixgbe_release_eeprom_semaphore(hw);
                return IXGBE_ERR_EEPROM;
        }

        return 0;
}

/**
 *  ixgbe_release_eeprom_semaphore - Release hardware semaphore
 *  @hw: pointer to hardware structure
 *
 *  This function clears hardware semaphore bits.
 **/
static void ixgbe_release_eeprom_semaphore(struct ixgbe_hw *hw)
{
        u32 swsm;

        swsm = IXGBE_READ_REG(hw, IXGBE_SWSM(hw));

        /* Release both semaphores by writing 0 to the bits SWESMBI and SMBI */
        swsm &= ~(IXGBE_SWSM_SWESMBI | IXGBE_SWSM_SMBI);
        IXGBE_WRITE_REG(hw, IXGBE_SWSM(hw), swsm);
        IXGBE_WRITE_FLUSH(hw);
}

/**
 *  ixgbe_ready_eeprom - Polls for EEPROM ready
 *  @hw: pointer to hardware structure
 **/
static s32 ixgbe_ready_eeprom(struct ixgbe_hw *hw)
{
        u16 i;
        u8 spi_stat_reg;

        /*
         * Read "Status Register" repeatedly until the LSB is cleared.  The
         * EEPROM will signal that the command has been completed by clearing
         * bit 0 of the internal status register.  If it's not cleared within
         * 5 milliseconds, then error out.
         */
        for (i = 0; i < IXGBE_EEPROM_MAX_RETRY_SPI; i += 5) {
                ixgbe_shift_out_eeprom_bits(hw, IXGBE_EEPROM_RDSR_OPCODE_SPI,
                                            IXGBE_EEPROM_OPCODE_BITS);
                spi_stat_reg = (u8)ixgbe_shift_in_eeprom_bits(hw, 8);
                if (!(spi_stat_reg & IXGBE_EEPROM_STATUS_RDY_SPI))
                        break;

                udelay(5);
                ixgbe_standby_eeprom(hw);
        }

        /*
         * On some parts, SPI write time could vary from 0-20mSec on 3.3V
         * devices (and only 0-5mSec on 5V devices)
         */
        if (i >= IXGBE_EEPROM_MAX_RETRY_SPI) {
                hw_dbg(hw, "SPI EEPROM Status error\n");
                return IXGBE_ERR_EEPROM;
        }

        return 0;
}

/**
 *  ixgbe_standby_eeprom - Returns EEPROM to a "standby" state
 *  @hw: pointer to hardware structure
 **/
static void ixgbe_standby_eeprom(struct ixgbe_hw *hw)
{
        u32 eec;

        eec = IXGBE_READ_REG(hw, IXGBE_EEC(hw));

        /* Toggle CS to flush commands */
        eec |= IXGBE_EEC_CS;
        IXGBE_WRITE_REG(hw, IXGBE_EEC(hw), eec);
        IXGBE_WRITE_FLUSH(hw);
        udelay(1);
        eec &= ~IXGBE_EEC_CS;
        IXGBE_WRITE_REG(hw, IXGBE_EEC(hw), eec);
        IXGBE_WRITE_FLUSH(hw);
        udelay(1);
}

/**
 *  ixgbe_shift_out_eeprom_bits - Shift data bits out to the EEPROM.
 *  @hw: pointer to hardware structure
 *  @data: data to send to the EEPROM
 *  @count: number of bits to shift out
 **/
static void ixgbe_shift_out_eeprom_bits(struct ixgbe_hw *hw, u16 data,
                                        u16 count)
{
        u32 eec;
        u32 mask;
        u32 i;

        eec = IXGBE_READ_REG(hw, IXGBE_EEC(hw));

        /*
         * Mask is used to shift "count" bits of "data" out to the EEPROM
         * one bit at a time.  Determine the starting bit based on count
         */
        mask = BIT(count - 1);

        for (i = 0; i < count; i++) {
                /*
                 * A "1" is shifted out to the EEPROM by setting bit "DI" to a
                 * "1", and then raising and then lowering the clock (the SK
                 * bit controls the clock input to the EEPROM).  A "0" is
                 * shifted out to the EEPROM by setting "DI" to "0" and then
                 * raising and then lowering the clock.
                 */
                if (data & mask)
                        eec |= IXGBE_EEC_DI;
                else
                        eec &= ~IXGBE_EEC_DI;

                IXGBE_WRITE_REG(hw, IXGBE_EEC(hw), eec);
                IXGBE_WRITE_FLUSH(hw);

                udelay(1);

                ixgbe_raise_eeprom_clk(hw, &eec);
                ixgbe_lower_eeprom_clk(hw, &eec);

                /*
                 * Shift mask to signify next bit of data to shift in to the
                 * EEPROM
                 */
                mask = mask >> 1;
        }

        /* We leave the "DI" bit set to "0" when we leave this routine. */
        eec &= ~IXGBE_EEC_DI;
        IXGBE_WRITE_REG(hw, IXGBE_EEC(hw), eec);
        IXGBE_WRITE_FLUSH(hw);
}

/**
 *  ixgbe_shift_in_eeprom_bits - Shift data bits in from the EEPROM
 *  @hw: pointer to hardware structure
 **/
static u16 ixgbe_shift_in_eeprom_bits(struct ixgbe_hw *hw, u16 count)
{
        u32 eec;
        u32 i;
        u16 data = 0;

        /*
         * In order to read a register from the EEPROM, we need to shift
         * 'count' bits in from the EEPROM. Bits are "shifted in" by raising
         * the clock input to the EEPROM (setting the SK bit), and then reading
         * the value of the "DO" bit.  During this "shifting in" process the
         * "DI" bit should always be clear.
         */
        eec = IXGBE_READ_REG(hw, IXGBE_EEC(hw));

        eec &= ~(IXGBE_EEC_DO | IXGBE_EEC_DI);

        for (i = 0; i < count; i++) {
                data = data << 1;
                ixgbe_raise_eeprom_clk(hw, &eec);

                eec = IXGBE_READ_REG(hw, IXGBE_EEC(hw));

                eec &= ~(IXGBE_EEC_DI);
                if (eec & IXGBE_EEC_DO)
                        data |= 1;

                ixgbe_lower_eeprom_clk(hw, &eec);
        }

        return data;
}

/**
 *  ixgbe_raise_eeprom_clk - Raises the EEPROM's clock input.
 *  @hw: pointer to hardware structure
 *  @eec: EEC register's current value
 **/
static void ixgbe_raise_eeprom_clk(struct ixgbe_hw *hw, u32 *eec)
{
        /*
         * Raise the clock input to the EEPROM
         * (setting the SK bit), then delay
         */
        *eec = *eec | IXGBE_EEC_SK;
        IXGBE_WRITE_REG(hw, IXGBE_EEC(hw), *eec);
        IXGBE_WRITE_FLUSH(hw);
        udelay(1);
}

/**
 *  ixgbe_lower_eeprom_clk - Lowers the EEPROM's clock input.
 *  @hw: pointer to hardware structure
 *  @eecd: EECD's current value
 **/
static void ixgbe_lower_eeprom_clk(struct ixgbe_hw *hw, u32 *eec)
{
        /*
         * Lower the clock input to the EEPROM (clearing the SK bit), then
         * delay
         */
        *eec = *eec & ~IXGBE_EEC_SK;
        IXGBE_WRITE_REG(hw, IXGBE_EEC(hw), *eec);
        IXGBE_WRITE_FLUSH(hw);
        udelay(1);
}

/**
 *  ixgbe_release_eeprom - Release EEPROM, release semaphores
 *  @hw: pointer to hardware structure
 **/
static void ixgbe_release_eeprom(struct ixgbe_hw *hw)
{
        u32 eec;

        eec = IXGBE_READ_REG(hw, IXGBE_EEC(hw));

        eec |= IXGBE_EEC_CS;  /* Pull CS high */
        eec &= ~IXGBE_EEC_SK; /* Lower SCK */

        IXGBE_WRITE_REG(hw, IXGBE_EEC(hw), eec);
        IXGBE_WRITE_FLUSH(hw);

        udelay(1);

        /* Stop requesting EEPROM access */
        eec &= ~IXGBE_EEC_REQ;
        IXGBE_WRITE_REG(hw, IXGBE_EEC(hw), eec);

        hw->mac.ops.release_swfw_sync(hw, IXGBE_GSSR_EEP_SM);

        /*
         * Delay before attempt to obtain semaphore again to allow FW
         * access. semaphore_delay is in ms we need us for usleep_range
         */
        usleep_range(hw->eeprom.semaphore_delay * 1000,
                     hw->eeprom.semaphore_delay * 2000);
}

/**
 *  ixgbe_calc_eeprom_checksum_generic - Calculates and returns the checksum
 *  @hw: pointer to hardware structure
 **/
s32 ixgbe_calc_eeprom_checksum_generic(struct ixgbe_hw *hw)
{
        u16 i;
        u16 j;
        u16 checksum = 0;
        u16 length = 0;
        u16 pointer = 0;
        u16 word = 0;

        /* Include 0x0-0x3F in the checksum */
        for (i = 0; i < IXGBE_EEPROM_CHECKSUM; i++) {
                if (hw->eeprom.ops.read(hw, i, &word)) {
                        hw_dbg(hw, "EEPROM read failed\n");
                        break;
                }
                checksum += word;
        }

        /* Include all data from pointers except for the fw pointer */
        for (i = IXGBE_PCIE_ANALOG_PTR; i < IXGBE_FW_PTR; i++) {
                if (hw->eeprom.ops.read(hw, i, &pointer)) {
                        hw_dbg(hw, "EEPROM read failed\n");
                        return IXGBE_ERR_EEPROM;
                }

                /* If the pointer seems invalid */
                if (pointer == 0xFFFF || pointer == 0)
                        continue;

                if (hw->eeprom.ops.read(hw, pointer, &length)) {
                        hw_dbg(hw, "EEPROM read failed\n");
                        return IXGBE_ERR_EEPROM;
                }

                if (length == 0xFFFF || length == 0)
                        continue;

                for (j = pointer + 1; j <= pointer + length; j++) {
                        if (hw->eeprom.ops.read(hw, j, &word)) {
                                hw_dbg(hw, "EEPROM read failed\n");
                                return IXGBE_ERR_EEPROM;
                        }
                        checksum += word;
                }
        }

        checksum = (u16)IXGBE_EEPROM_SUM - checksum;

        return (s32)checksum;
}

/**
 *  ixgbe_validate_eeprom_checksum_generic - Validate EEPROM checksum
 *  @hw: pointer to hardware structure
 *  @checksum_val: calculated checksum
 *
 *  Performs checksum calculation and validates the EEPROM checksum.  If the
 *  caller does not need checksum_val, the value can be NULL.
 **/
s32 ixgbe_validate_eeprom_checksum_generic(struct ixgbe_hw *hw,
                                           u16 *checksum_val)
{
        s32 status;
        u16 checksum;
        u16 read_checksum = 0;

        /*
         * Read the first word from the EEPROM. If this times out or fails, do
         * not continue or we could be in for a very long wait while every
         * EEPROM read fails
         */
        status = hw->eeprom.ops.read(hw, 0, &checksum);
        if (status) {
                hw_dbg(hw, "EEPROM read failed\n");
                return status;
        }

        status = hw->eeprom.ops.calc_checksum(hw);
        if (status < 0)
                return status;

        checksum = (u16)(status & 0xffff);

        status = hw->eeprom.ops.read(hw, IXGBE_EEPROM_CHECKSUM, &read_checksum);
        if (status) {
                hw_dbg(hw, "EEPROM read failed\n");
                return status;
        }

        /* Verify read checksum from EEPROM is the same as
         * calculated checksum
         */
        if (read_checksum != checksum)
                status = IXGBE_ERR_EEPROM_CHECKSUM;

        /* If the user cares, return the calculated checksum */
        if (checksum_val)
                *checksum_val = checksum;

        return status;
}

/**
 *  ixgbe_update_eeprom_checksum_generic - Updates the EEPROM checksum
 *  @hw: pointer to hardware structure
 **/
s32 ixgbe_update_eeprom_checksum_generic(struct ixgbe_hw *hw)
{
        s32 status;
        u16 checksum;

        /*
         * Read the first word from the EEPROM. If this times out or fails, do
         * not continue or we could be in for a very long wait while every
         * EEPROM read fails
         */
        status = hw->eeprom.ops.read(hw, 0, &checksum);
        if (status) {
                hw_dbg(hw, "EEPROM read failed\n");
                return status;
        }

        status = hw->eeprom.ops.calc_checksum(hw);
        if (status < 0)
                return status;

        checksum = (u16)(status & 0xffff);

        status = hw->eeprom.ops.write(hw, IXGBE_EEPROM_CHECKSUM, checksum);

        return status;
}

/**
 *  ixgbe_set_rar_generic - Set Rx address register
 *  @hw: pointer to hardware structure
 *  @index: Receive address register to write
 *  @addr: Address to put into receive address register
 *  @vmdq: VMDq "set" or "pool" index
 *  @enable_addr: set flag that address is active
 *
 *  Puts an ethernet address into a receive address register.
 **/
s32 ixgbe_set_rar_generic(struct ixgbe_hw *hw, u32 index, u8 *addr, u32 vmdq,
                          u32 enable_addr)
{
        u32 rar_low, rar_high;
        u32 rar_entries = hw->mac.num_rar_entries;

        /* Make sure we are using a valid rar index range */
        if (index >= rar_entries) {
                hw_dbg(hw, "RAR index %d is out of range.\n", index);
                return IXGBE_ERR_INVALID_ARGUMENT;
        }

        /* setup VMDq pool selection before this RAR gets enabled */
        hw->mac.ops.set_vmdq(hw, index, vmdq);

        /*
         * HW expects these in little endian so we reverse the byte
         * order from network order (big endian) to little endian
         */
        rar_low = ((u32)addr[0] |
                   ((u32)addr[1] << 8) |
                   ((u32)addr[2] << 16) |
                   ((u32)addr[3] << 24));
        /*
         * Some parts put the VMDq setting in the extra RAH bits,
         * so save everything except the lower 16 bits that hold part
         * of the address and the address valid bit.
         */
        rar_high = IXGBE_READ_REG(hw, IXGBE_RAH(index));
        rar_high &= ~(0x0000FFFF | IXGBE_RAH_AV);
        rar_high |= ((u32)addr[4] | ((u32)addr[5] << 8));

        if (enable_addr != 0)
                rar_high |= IXGBE_RAH_AV;

        IXGBE_WRITE_REG(hw, IXGBE_RAL(index), rar_low);
        IXGBE_WRITE_REG(hw, IXGBE_RAH(index), rar_high);

        return 0;
}

/**
 *  ixgbe_clear_rar_generic - Remove Rx address register
 *  @hw: pointer to hardware structure
 *  @index: Receive address register to write
 *
 *  Clears an ethernet address from a receive address register.
 **/
s32 ixgbe_clear_rar_generic(struct ixgbe_hw *hw, u32 index)
{
        u32 rar_high;
        u32 rar_entries = hw->mac.num_rar_entries;

        /* Make sure we are using a valid rar index range */
        if (index >= rar_entries) {
                hw_dbg(hw, "RAR index %d is out of range.\n", index);
                return IXGBE_ERR_INVALID_ARGUMENT;
        }

        /*
         * Some parts put the VMDq setting in the extra RAH bits,
         * so save everything except the lower 16 bits that hold part
         * of the address and the address valid bit.
         */
        rar_high = IXGBE_READ_REG(hw, IXGBE_RAH(index));
        rar_high &= ~(0x0000FFFF | IXGBE_RAH_AV);

        IXGBE_WRITE_REG(hw, IXGBE_RAL(index), 0);
        IXGBE_WRITE_REG(hw, IXGBE_RAH(index), rar_high);

        /* clear VMDq pool/queue selection for this RAR */
        hw->mac.ops.clear_vmdq(hw, index, IXGBE_CLEAR_VMDQ_ALL);

        return 0;
}

/**
 *  ixgbe_init_rx_addrs_generic - Initializes receive address filters.
 *  @hw: pointer to hardware structure
 *
 *  Places the MAC address in receive address register 0 and clears the rest
 *  of the receive address registers. Clears the multicast table. Assumes
 *  the receiver is in reset when the routine is called.
 **/
s32 ixgbe_init_rx_addrs_generic(struct ixgbe_hw *hw)
{
        u32 i;
        u32 rar_entries = hw->mac.num_rar_entries;

        /*
         * If the current mac address is valid, assume it is a software override
         * to the permanent address.
         * Otherwise, use the permanent address from the eeprom.
         */
        if (!is_valid_ether_addr(hw->mac.addr)) {
                /* Get the MAC address from the RAR0 for later reference */
                hw->mac.ops.get_mac_addr(hw, hw->mac.addr);

                hw_dbg(hw, " Keeping Current RAR0 Addr =%pM\n", hw->mac.addr);
        } else {
                /* Setup the receive address. */
                hw_dbg(hw, "Overriding MAC Address in RAR[0]\n");
                hw_dbg(hw, " New MAC Addr =%pM\n", hw->mac.addr);

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

        /*  clear VMDq pool/queue selection for RAR 0 */
        hw->mac.ops.clear_vmdq(hw, 0, IXGBE_CLEAR_VMDQ_ALL);

        hw->addr_ctrl.overflow_promisc = 0;

        hw->addr_ctrl.rar_used_count = 1;

        /* Zero out the other receive addresses. */
        hw_dbg(hw, "Clearing RAR[1-%d]\n", rar_entries - 1);
        for (i = 1; i < rar_entries; i++) {
                IXGBE_WRITE_REG(hw, IXGBE_RAL(i), 0);
                IXGBE_WRITE_REG(hw, IXGBE_RAH(i), 0);
        }

        /* Clear the MTA */
        hw->addr_ctrl.mta_in_use = 0;
        IXGBE_WRITE_REG(hw, IXGBE_MCSTCTRL, hw->mac.mc_filter_type);

        hw_dbg(hw, " Clearing MTA\n");
        for (i = 0; i < hw->mac.mcft_size; i++)
                IXGBE_WRITE_REG(hw, IXGBE_MTA(i), 0);

        if (hw->mac.ops.init_uta_tables)
                hw->mac.ops.init_uta_tables(hw);

        return 0;
}

/**
 *  ixgbe_mta_vector - Determines bit-vector in multicast table to set
 *  @hw: pointer to hardware structure
 *  @mc_addr: the multicast address
 *
 *  Extracts the 12 bits, from a multicast address, to determine which
 *  bit-vector to set in the multicast table. The hardware uses 12 bits, from
 *  incoming rx multicast addresses, to determine the bit-vector to check in
 *  the MTA. Which of the 4 combination, of 12-bits, the hardware uses is set
 *  by the MO field of the MCSTCTRL. The MO field is set during initialization
 *  to mc_filter_type.
 **/
static s32 ixgbe_mta_vector(struct ixgbe_hw *hw, u8 *mc_addr)
{
        u32 vector = 0;

        switch (hw->mac.mc_filter_type) {
        case 0:   /* use bits [47:36] of the address */
                vector = ((mc_addr[4] >> 4) | (((u16)mc_addr[5]) << 4));
                break;
        case 1:   /* use bits [46:35] of the address */
                vector = ((mc_addr[4] >> 3) | (((u16)mc_addr[5]) << 5));
                break;
        case 2:   /* use bits [45:34] of the address */
                vector = ((mc_addr[4] >> 2) | (((u16)mc_addr[5]) << 6));
                break;
        case 3:   /* use bits [43:32] of the address */
                vector = ((mc_addr[4]) | (((u16)mc_addr[5]) << 8));
                break;
        default:  /* Invalid mc_filter_type */
                hw_dbg(hw, "MC filter type param set incorrectly\n");
                break;
        }

        /* vector can only be 12-bits or boundary will be exceeded */
        vector &= 0xFFF;
        return vector;
}

/**
 *  ixgbe_set_mta - Set bit-vector in multicast table
 *  @hw: pointer to hardware structure
 *  @hash_value: Multicast address hash value
 *
 *  Sets the bit-vector in the multicast table.
 **/
static void ixgbe_set_mta(struct ixgbe_hw *hw, u8 *mc_addr)
{
        u32 vector;
        u32 vector_bit;
        u32 vector_reg;

        hw->addr_ctrl.mta_in_use++;

        vector = ixgbe_mta_vector(hw, mc_addr);
        hw_dbg(hw, " bit-vector = 0x%03X\n", vector);

        /*
         * The MTA is a register array of 128 32-bit registers. It is treated
         * like an array of 4096 bits.  We want to set bit
         * BitArray[vector_value]. So we figure out what register the bit is
         * in, read it, OR in the new bit, then write back the new value.  The
         * register is determined by the upper 7 bits of the vector value and
         * the bit within that register are determined by the lower 5 bits of
         * the value.
         */
        vector_reg = (vector >> 5) & 0x7F;
        vector_bit = vector & 0x1F;
        hw->mac.mta_shadow[vector_reg] |= BIT(vector_bit);
}

/**
 *  ixgbe_update_mc_addr_list_generic - Updates MAC list of multicast addresses
 *  @hw: pointer to hardware structure
 *  @netdev: pointer to net device structure
 *
 *  The given list replaces any existing list. Clears the MC addrs from receive
 *  address registers and the multicast table. Uses unused receive address
 *  registers for the first multicast addresses, and hashes the rest into the
 *  multicast table.
 **/
s32 ixgbe_update_mc_addr_list_generic(struct ixgbe_hw *hw,
                                      struct net_device *netdev)
{
        struct netdev_hw_addr *ha;
        u32 i;

        /*
         * Set the new number of MC addresses that we are being requested to
         * use.
         */
        hw->addr_ctrl.num_mc_addrs = netdev_mc_count(netdev);
        hw->addr_ctrl.mta_in_use = 0;

        /* Clear mta_shadow */
        hw_dbg(hw, " Clearing MTA\n");
        memset(&hw->mac.mta_shadow, 0, sizeof(hw->mac.mta_shadow));

        /* Update mta shadow */
        netdev_for_each_mc_addr(ha, netdev) {
                hw_dbg(hw, " Adding the multicast addresses:\n");
                ixgbe_set_mta(hw, ha->addr);
        }

        /* Enable mta */
        for (i = 0; i < hw->mac.mcft_size; i++)
                IXGBE_WRITE_REG_ARRAY(hw, IXGBE_MTA(0), i,
                                      hw->mac.mta_shadow[i]);

        if (hw->addr_ctrl.mta_in_use > 0)
                IXGBE_WRITE_REG(hw, IXGBE_MCSTCTRL,
                                IXGBE_MCSTCTRL_MFE | hw->mac.mc_filter_type);

        hw_dbg(hw, "ixgbe_update_mc_addr_list_generic Complete\n");
        return 0;
}

/**
 *  ixgbe_enable_mc_generic - Enable multicast address in RAR
 *  @hw: pointer to hardware structure
 *
 *  Enables multicast address in RAR and the use of the multicast hash table.
 **/
s32 ixgbe_enable_mc_generic(struct ixgbe_hw *hw)
{
        struct ixgbe_addr_filter_info *a = &hw->addr_ctrl;

        if (a->mta_in_use > 0)
                IXGBE_WRITE_REG(hw, IXGBE_MCSTCTRL, IXGBE_MCSTCTRL_MFE |
                                hw->mac.mc_filter_type);

        return 0;
}

/**
 *  ixgbe_disable_mc_generic - Disable multicast address in RAR
 *  @hw: pointer to hardware structure
 *
 *  Disables multicast address in RAR and the use of the multicast hash table.
 **/
s32 ixgbe_disable_mc_generic(struct ixgbe_hw *hw)
{
        struct ixgbe_addr_filter_info *a = &hw->addr_ctrl;

        if (a->mta_in_use > 0)
                IXGBE_WRITE_REG(hw, IXGBE_MCSTCTRL, hw->mac.mc_filter_type);

        return 0;
}

/**
 *  ixgbe_fc_enable_generic - Enable flow control
 *  @hw: pointer to hardware structure
 *
 *  Enable flow control according to the current settings.
 **/
s32 ixgbe_fc_enable_generic(struct ixgbe_hw *hw)
{
        u32 mflcn_reg, fccfg_reg;
        u32 reg;
        u32 fcrtl, fcrth;
        int i;

        /* Validate the water mark configuration. */
        if (!hw->fc.pause_time)
                return IXGBE_ERR_INVALID_LINK_SETTINGS;

        /* Low water mark of zero causes XOFF floods */
        for (i = 0; i < MAX_TRAFFIC_CLASS; i++) {
                if ((hw->fc.current_mode & ixgbe_fc_tx_pause) &&
                    hw->fc.high_water[i]) {
                        if (!hw->fc.low_water[i] ||
                            hw->fc.low_water[i] >= hw->fc.high_water[i]) {
                                hw_dbg(hw, "Invalid water mark configuration\n");
                                return IXGBE_ERR_INVALID_LINK_SETTINGS;
                        }
                }
        }

        /* Negotiate the fc mode to use */
        ixgbe_fc_autoneg(hw);

        /* Disable any previous flow control settings */
        mflcn_reg = IXGBE_READ_REG(hw, IXGBE_MFLCN);
        mflcn_reg &= ~(IXGBE_MFLCN_RPFCE_MASK | IXGBE_MFLCN_RFCE);

        fccfg_reg = IXGBE_READ_REG(hw, IXGBE_FCCFG);
        fccfg_reg &= ~(IXGBE_FCCFG_TFCE_802_3X | IXGBE_FCCFG_TFCE_PRIORITY);

        /*
         * The possible values of fc.current_mode are:
         * 0: Flow control is completely disabled
         * 1: Rx flow control is enabled (we can receive pause frames,
         *    but not send pause frames).
         * 2: Tx flow control is enabled (we can send pause frames but
         *    we do not support receiving pause frames).
         * 3: Both Rx and Tx flow control (symmetric) are enabled.
         * other: Invalid.
         */
        switch (hw->fc.current_mode) {
        case ixgbe_fc_none:
                /*
                 * Flow control is disabled by software override or autoneg.
                 * The code below will actually disable it in the HW.
                 */
                break;
        case ixgbe_fc_rx_pause:
                /*
                 * Rx Flow control is enabled and Tx Flow control is
                 * disabled by software override. Since there really
                 * isn't a way to advertise that we are capable of RX
                 * Pause ONLY, we will advertise that we support both
                 * symmetric and asymmetric Rx PAUSE.  Later, we will
                 * disable the adapter's ability to send PAUSE frames.
                 */
                mflcn_reg |= IXGBE_MFLCN_RFCE;
                break;
        case ixgbe_fc_tx_pause:
                /*
                 * Tx Flow control is enabled, and Rx Flow control is
                 * disabled by software override.
                 */
                fccfg_reg |= IXGBE_FCCFG_TFCE_802_3X;
                break;
        case ixgbe_fc_full:
                /* Flow control (both Rx and Tx) is enabled by SW override. */
                mflcn_reg |= IXGBE_MFLCN_RFCE;
                fccfg_reg |= IXGBE_FCCFG_TFCE_802_3X;
                break;
        default:
                hw_dbg(hw, "Flow control param set incorrectly\n");
                return IXGBE_ERR_CONFIG;
        }

        /* Set 802.3x based flow control settings. */
        mflcn_reg |= IXGBE_MFLCN_DPF;
        IXGBE_WRITE_REG(hw, IXGBE_MFLCN, mflcn_reg);
        IXGBE_WRITE_REG(hw, IXGBE_FCCFG, fccfg_reg);

        /* Set up and enable Rx high/low water mark thresholds, enable XON. */
        for (i = 0; i < MAX_TRAFFIC_CLASS; i++) {
                if ((hw->fc.current_mode & ixgbe_fc_tx_pause) &&
                    hw->fc.high_water[i]) {
                        fcrtl = (hw->fc.low_water[i] << 10) | IXGBE_FCRTL_XONE;
                        IXGBE_WRITE_REG(hw, IXGBE_FCRTL_82599(i), fcrtl);
                        fcrth = (hw->fc.high_water[i] << 10) | IXGBE_FCRTH_FCEN;
                } else {
                        IXGBE_WRITE_REG(hw, IXGBE_FCRTL_82599(i), 0);
                        /*
                         * In order to prevent Tx hangs when the internal Tx
                         * switch is enabled we must set the high water mark
                         * to the Rx packet buffer size - 24KB.  This allows
                         * the Tx switch to function even under heavy Rx
                         * workloads.
                         */
                        fcrth = IXGBE_READ_REG(hw, IXGBE_RXPBSIZE(i)) - 24576;
                }

                IXGBE_WRITE_REG(hw, IXGBE_FCRTH_82599(i), fcrth);
        }

        /* Configure pause time (2 TCs per register) */
        reg = hw->fc.pause_time * 0x00010001;
        for (i = 0; i < (MAX_TRAFFIC_CLASS / 2); i++)
                IXGBE_WRITE_REG(hw, IXGBE_FCTTV(i), reg);

        IXGBE_WRITE_REG(hw, IXGBE_FCRTV, hw->fc.pause_time / 2);

        return 0;
}

/**
 *  ixgbe_negotiate_fc - Negotiate flow control
 *  @hw: pointer to hardware structure
 *  @adv_reg: flow control advertised settings
 *  @lp_reg: link partner's flow control settings
 *  @adv_sym: symmetric pause bit in advertisement
 *  @adv_asm: asymmetric pause bit in advertisement
 *  @lp_sym: symmetric pause bit in link partner advertisement
 *  @lp_asm: asymmetric pause bit in link partner advertisement
 *
 *  Find the intersection between advertised settings and link partner's
 *  advertised settings
 **/
static s32 ixgbe_negotiate_fc(struct ixgbe_hw *hw, u32 adv_reg, u32 lp_reg,
                              u32 adv_sym, u32 adv_asm, u32 lp_sym, u32 lp_asm)
{
        if ((!(adv_reg)) ||  (!(lp_reg)))
                return IXGBE_ERR_FC_NOT_NEGOTIATED;

        if ((adv_reg & adv_sym) && (lp_reg & lp_sym)) {
                /*
                 * Now we need to check if the user selected Rx ONLY
                 * of pause frames.  In this case, we had to advertise
                 * FULL flow control because we could not advertise RX
                 * ONLY. Hence, we must now check to see if we need to
                 * turn OFF the TRANSMISSION of PAUSE frames.
                 */
                if (hw->fc.requested_mode == ixgbe_fc_full) {
                        hw->fc.current_mode = ixgbe_fc_full;
                        hw_dbg(hw, "Flow Control = FULL.\n");
                } else {
                        hw->fc.current_mode = ixgbe_fc_rx_pause;
                        hw_dbg(hw, "Flow Control=RX PAUSE frames only\n");
                }
        } else if (!(adv_reg & adv_sym) && (adv_reg & adv_asm) &&
                   (lp_reg & lp_sym) && (lp_reg & lp_asm)) {
                hw->fc.current_mode = ixgbe_fc_tx_pause;
                hw_dbg(hw, "Flow Control = TX PAUSE frames only.\n");
        } else if ((adv_reg & adv_sym) && (adv_reg & adv_asm) &&
                   !(lp_reg & lp_sym) && (lp_reg & lp_asm)) {
                hw->fc.current_mode = ixgbe_fc_rx_pause;
                hw_dbg(hw, "Flow Control = RX PAUSE frames only.\n");
        } else {
                hw->fc.current_mode = ixgbe_fc_none;
                hw_dbg(hw, "Flow Control = NONE.\n");
        }
        return 0;
}

/**
 *  ixgbe_fc_autoneg_fiber - Enable flow control on 1 gig fiber
 *  @hw: pointer to hardware structure
 *
 *  Enable flow control according on 1 gig fiber.
 **/
static s32 ixgbe_fc_autoneg_fiber(struct ixgbe_hw *hw)
{
        u32 pcs_anadv_reg, pcs_lpab_reg, linkstat;
        s32 ret_val;

        /*
         * On multispeed fiber at 1g, bail out if
         * - link is up but AN did not complete, or if
         * - link is up and AN completed but timed out
         */

        linkstat = IXGBE_READ_REG(hw, IXGBE_PCS1GLSTA);
        if ((!!(linkstat & IXGBE_PCS1GLSTA_AN_COMPLETE) == 0) ||
            (!!(linkstat & IXGBE_PCS1GLSTA_AN_TIMED_OUT) == 1))
                return IXGBE_ERR_FC_NOT_NEGOTIATED;

        pcs_anadv_reg = IXGBE_READ_REG(hw, IXGBE_PCS1GANA);
        pcs_lpab_reg = IXGBE_READ_REG(hw, IXGBE_PCS1GANLP);

        ret_val =  ixgbe_negotiate_fc(hw, pcs_anadv_reg,
                               pcs_lpab_reg, IXGBE_PCS1GANA_SYM_PAUSE,
                               IXGBE_PCS1GANA_ASM_PAUSE,
                               IXGBE_PCS1GANA_SYM_PAUSE,
                               IXGBE_PCS1GANA_ASM_PAUSE);

        return ret_val;
}

/**
 *  ixgbe_fc_autoneg_backplane - Enable flow control IEEE clause 37
 *  @hw: pointer to hardware structure
 *
 *  Enable flow control according to IEEE clause 37.
 **/
static s32 ixgbe_fc_autoneg_backplane(struct ixgbe_hw *hw)
{
        u32 links2, anlp1_reg, autoc_reg, links;
        s32 ret_val;

        /*
         * On backplane, bail out if
         * - backplane autoneg was not completed, or if
         * - we are 82599 and link partner is not AN enabled
         */
        links = IXGBE_READ_REG(hw, IXGBE_LINKS);
        if ((links & IXGBE_LINKS_KX_AN_COMP) == 0)
                return IXGBE_ERR_FC_NOT_NEGOTIATED;

        if (hw->mac.type == ixgbe_mac_82599EB) {
                links2 = IXGBE_READ_REG(hw, IXGBE_LINKS2);
                if ((links2 & IXGBE_LINKS2_AN_SUPPORTED) == 0)
                        return IXGBE_ERR_FC_NOT_NEGOTIATED;
        }
        /*
         * Read the 10g AN autoc and LP ability registers and resolve
         * local flow control settings accordingly
         */
        autoc_reg = IXGBE_READ_REG(hw, IXGBE_AUTOC);
        anlp1_reg = IXGBE_READ_REG(hw, IXGBE_ANLP1);

        ret_val = ixgbe_negotiate_fc(hw, autoc_reg,
                anlp1_reg, IXGBE_AUTOC_SYM_PAUSE, IXGBE_AUTOC_ASM_PAUSE,
                IXGBE_ANLP1_SYM_PAUSE, IXGBE_ANLP1_ASM_PAUSE);

        return ret_val;
}

/**
 *  ixgbe_fc_autoneg_copper - Enable flow control IEEE clause 37
 *  @hw: pointer to hardware structure
 *
 *  Enable flow control according to IEEE clause 37.
 **/
static s32 ixgbe_fc_autoneg_copper(struct ixgbe_hw *hw)
{
        u16 technology_ability_reg = 0;
        u16 lp_technology_ability_reg = 0;

        hw->phy.ops.read_reg(hw, MDIO_AN_ADVERTISE,
                             MDIO_MMD_AN,
                             &technology_ability_reg);
        hw->phy.ops.read_reg(hw, MDIO_AN_LPA,
                             MDIO_MMD_AN,
                             &lp_technology_ability_reg);

        return ixgbe_negotiate_fc(hw, (u32)technology_ability_reg,
                                  (u32)lp_technology_ability_reg,
                                  IXGBE_TAF_SYM_PAUSE, IXGBE_TAF_ASM_PAUSE,
                                  IXGBE_TAF_SYM_PAUSE, IXGBE_TAF_ASM_PAUSE);
}

/**
 *  ixgbe_fc_autoneg - Configure flow control
 *  @hw: pointer to hardware structure
 *
 *  Compares our advertised flow control capabilities to those advertised by
 *  our link partner, and determines the proper flow control mode to use.
 **/
void ixgbe_fc_autoneg(struct ixgbe_hw *hw)
{
        s32 ret_val = IXGBE_ERR_FC_NOT_NEGOTIATED;
        ixgbe_link_speed speed;
        bool link_up;

        /*
         * AN should have completed when the cable was plugged in.
         * Look for reasons to bail out.  Bail out if:
         * - FC autoneg is disabled, or if
         * - link is not up.
         *
         * Since we're being called from an LSC, link is already known to be up.
         * So use link_up_wait_to_complete=false.
         */
        if (hw->fc.disable_fc_autoneg)
                goto out;

        hw->mac.ops.check_link(hw, &speed, &link_up, false);
        if (!link_up)
                goto out;

        switch (hw->phy.media_type) {
        /* Autoneg flow control on fiber adapters */
        case ixgbe_media_type_fiber:
                if (speed == IXGBE_LINK_SPEED_1GB_FULL)
                        ret_val = ixgbe_fc_autoneg_fiber(hw);
                break;

        /* Autoneg flow control on backplane adapters */
        case ixgbe_media_type_backplane:
                ret_val = ixgbe_fc_autoneg_backplane(hw);
                break;

        /* Autoneg flow control on copper adapters */
        case ixgbe_media_type_copper:
                if (ixgbe_device_supports_autoneg_fc(hw))
                        ret_val = ixgbe_fc_autoneg_copper(hw);
                break;

        default:
                break;
        }

out:
        if (ret_val == 0) {
                hw->fc.fc_was_autonegged = true;
        } else {
                hw->fc.fc_was_autonegged = false;
                hw->fc.current_mode = hw->fc.requested_mode;
        }
}

/**
 * ixgbe_pcie_timeout_poll - Return number of times to poll for completion
 * @hw: pointer to hardware structure
 *
 * System-wide timeout range is encoded in PCIe Device Control2 register.
 *
 *  Add 10% to specified maximum and return the number of times to poll for
 *  completion timeout, in units of 100 microsec.  Never return less than
 *  800 = 80 millisec.
 **/
static u32 ixgbe_pcie_timeout_poll(struct ixgbe_hw *hw)
{
        s16 devctl2;
        u32 pollcnt;

        devctl2 = ixgbe_read_pci_cfg_word(hw, IXGBE_PCI_DEVICE_CONTROL2);
        devctl2 &= IXGBE_PCIDEVCTRL2_TIMEO_MASK;

        switch (devctl2) {
        case IXGBE_PCIDEVCTRL2_65_130ms:
                 pollcnt = 1300;         /* 130 millisec */
                break;
        case IXGBE_PCIDEVCTRL2_260_520ms:
                pollcnt = 5200;         /* 520 millisec */
                break;
        case IXGBE_PCIDEVCTRL2_1_2s:
                pollcnt = 20000;        /* 2 sec */
                break;
        case IXGBE_PCIDEVCTRL2_4_8s:
                pollcnt = 80000;        /* 8 sec */
                break;
        case IXGBE_PCIDEVCTRL2_17_34s:
                pollcnt = 34000;        /* 34 sec */
                break;
        case IXGBE_PCIDEVCTRL2_50_100us:        /* 100 microsecs */
        case IXGBE_PCIDEVCTRL2_1_2ms:           /* 2 millisecs */
        case IXGBE_PCIDEVCTRL2_16_32ms:         /* 32 millisec */
        case IXGBE_PCIDEVCTRL2_16_32ms_def:     /* 32 millisec default */
        default:
                pollcnt = 800;          /* 80 millisec minimum */
                break;
        }

        /* add 10% to spec maximum */
        return (pollcnt * 11) / 10;
}

/**
 *  ixgbe_disable_pcie_master - Disable PCI-express master access
 *  @hw: pointer to hardware structure
 *
 *  Disables PCI-Express master access and verifies there are no pending
 *  requests. IXGBE_ERR_MASTER_REQUESTS_PENDING is returned if master disable
 *  bit hasn't caused the master requests to be disabled, else 0
 *  is returned signifying master requests disabled.
 **/
static s32 ixgbe_disable_pcie_master(struct ixgbe_hw *hw)
{
        u32 i, poll;
        u16 value;

        /* Always set this bit to ensure any future transactions are blocked */
        IXGBE_WRITE_REG(hw, IXGBE_CTRL, IXGBE_CTRL_GIO_DIS);

        /* Poll for bit to read as set */
        for (i = 0; i < IXGBE_PCI_MASTER_DISABLE_TIMEOUT; i++) {
                if (IXGBE_READ_REG(hw, IXGBE_CTRL) & IXGBE_CTRL_GIO_DIS)
                        break;
                usleep_range(100, 120);
        }
        if (i >= IXGBE_PCI_MASTER_DISABLE_TIMEOUT) {
                hw_dbg(hw, "GIO disable did not set - requesting resets\n");
                goto gio_disable_fail;
        }

        /* Exit if master requests are blocked */
        if (!(IXGBE_READ_REG(hw, IXGBE_STATUS) & IXGBE_STATUS_GIO) ||
            ixgbe_removed(hw->hw_addr))
                return 0;

        /* Poll for master request bit to clear */
        for (i = 0; i < IXGBE_PCI_MASTER_DISABLE_TIMEOUT; i++) {
                udelay(100);
                if (!(IXGBE_READ_REG(hw, IXGBE_STATUS) & IXGBE_STATUS_GIO))
                        return 0;
        }

        /*
         * Two consecutive resets are required via CTRL.RST per datasheet
         * 5.2.5.3.2 Master Disable.  We set a flag to inform the reset routine
         * of this need.  The first reset prevents new master requests from
         * being issued by our device.  We then must wait 1usec or more for any
         * remaining completions from the PCIe bus to trickle in, and then reset
         * again to clear out any effects they may have had on our device.
         */
        hw_dbg(hw, "GIO Master Disable bit didn't clear - requesting resets\n");
gio_disable_fail:
        hw->mac.flags |= IXGBE_FLAGS_DOUBLE_RESET_REQUIRED;

        if (hw->mac.type >= ixgbe_mac_X550)
                return 0;

        /*
         * Before proceeding, make sure that the PCIe block does not have
         * transactions pending.
         */
        poll = ixgbe_pcie_timeout_poll(hw);
        for (i = 0; i < poll; i++) {
                udelay(100);
                value = ixgbe_read_pci_cfg_word(hw, IXGBE_PCI_DEVICE_STATUS);
                if (ixgbe_removed(hw->hw_addr))
                        return 0;
                if (!(value & IXGBE_PCI_DEVICE_STATUS_TRANSACTION_PENDING))
                        return 0;
        }

        hw_dbg(hw, "PCIe transaction pending bit also did not clear.\n");
        return IXGBE_ERR_MASTER_REQUESTS_PENDING;
}

/**
 *  ixgbe_acquire_swfw_sync - Acquire SWFW semaphore
 *  @hw: pointer to hardware structure
 *  @mask: Mask to specify which semaphore to acquire
 *
 *  Acquires the SWFW semaphore through the GSSR register for the specified
 *  function (CSR, PHY0, PHY1, EEPROM, Flash)
 **/
s32 ixgbe_acquire_swfw_sync(struct ixgbe_hw *hw, u32 mask)
{
        u32 gssr = 0;
        u32 swmask = mask;
        u32 fwmask = mask << 5;
        u32 timeout = 200;
        u32 i;

        for (i = 0; i < timeout; i++) {
                /*
                 * SW NVM semaphore bit is used for access to all
                 * SW_FW_SYNC bits (not just NVM)
                 */
                if (ixgbe_get_eeprom_semaphore(hw))
                        return IXGBE_ERR_SWFW_SYNC;

                gssr = IXGBE_READ_REG(hw, IXGBE_GSSR);
                if (!(gssr & (fwmask | swmask))) {
                        gssr |= swmask;
                        IXGBE_WRITE_REG(hw, IXGBE_GSSR, gssr);
                        ixgbe_release_eeprom_semaphore(hw);
                        return 0;
                } else {
                        /* Resource is currently in use by FW or SW */
                        ixgbe_release_eeprom_semaphore(hw);
                        usleep_range(5000, 10000);
                }
        }

        /* If time expired clear the bits holding the lock and retry */
        if (gssr & (fwmask | swmask))
                ixgbe_release_swfw_sync(hw, gssr & (fwmask | swmask));

        usleep_range(5000, 10000);
        return IXGBE_ERR_SWFW_SYNC;
}

/**
 *  ixgbe_release_swfw_sync - Release SWFW semaphore
 *  @hw: pointer to hardware structure
 *  @mask: Mask to specify which semaphore to release
 *
 *  Releases the SWFW semaphore through the GSSR register for the specified
 *  function (CSR, PHY0, PHY1, EEPROM, Flash)
 **/
void ixgbe_release_swfw_sync(struct ixgbe_hw *hw, u32 mask)
{
        u32 gssr;
        u32 swmask = mask;

        ixgbe_get_eeprom_semaphore(hw);

        gssr = IXGBE_READ_REG(hw, IXGBE_GSSR);
        gssr &= ~swmask;
        IXGBE_WRITE_REG(hw, IXGBE_GSSR, gssr);

        ixgbe_release_eeprom_semaphore(hw);
}

/**
 * prot_autoc_read_generic - Hides MAC differences needed for AUTOC read
 * @hw: pointer to hardware structure
 * @reg_val: Value we read from AUTOC
 * @locked: bool to indicate whether the SW/FW lock should be taken.  Never
 *          true in this the generic case.
 *
 * The default case requires no protection so just to the register read.
 **/
s32 prot_autoc_read_generic(struct ixgbe_hw *hw, bool *locked, u32 *reg_val)
{
        *locked = false;
        *reg_val = IXGBE_READ_REG(hw, IXGBE_AUTOC);
        return 0;
}

/**
 * prot_autoc_write_generic - Hides MAC differences needed for AUTOC write
 * @hw: pointer to hardware structure
 * @reg_val: value to write to AUTOC
 * @locked: bool to indicate whether the SW/FW lock was already taken by
 *          previous read.
 **/
s32 prot_autoc_write_generic(struct ixgbe_hw *hw, u32 reg_val, bool locked)
{
        IXGBE_WRITE_REG(hw, IXGBE_AUTOC, reg_val);
        return 0;
}

/**
 *  ixgbe_disable_rx_buff_generic - Stops the receive data path
 *  @hw: pointer to hardware structure
 *
 *  Stops the receive data path and waits for the HW to internally
 *  empty the Rx security block.
 **/
s32 ixgbe_disable_rx_buff_generic(struct ixgbe_hw *hw)
{
#define IXGBE_MAX_SECRX_POLL 40
        int i;
        int secrxreg;

        secrxreg = IXGBE_READ_REG(hw, IXGBE_SECRXCTRL);
        secrxreg |= IXGBE_SECRXCTRL_RX_DIS;
        IXGBE_WRITE_REG(hw, IXGBE_SECRXCTRL, secrxreg);
        for (i = 0; i < IXGBE_MAX_SECRX_POLL; i++) {
                secrxreg = IXGBE_READ_REG(hw, IXGBE_SECRXSTAT);
                if (secrxreg & IXGBE_SECRXSTAT_SECRX_RDY)
                        break;
                else
                        /* Use interrupt-safe sleep just in case */
                        udelay(1000);
        }

        /* For informational purposes only */
        if (i >= IXGBE_MAX_SECRX_POLL)
                hw_dbg(hw, "Rx unit being enabled before security path fully disabled. Continuing with init.\n");

        return 0;

}

/**
 *  ixgbe_enable_rx_buff - Enables the receive data path
 *  @hw: pointer to hardware structure
 *
 *  Enables the receive data path
 **/
s32 ixgbe_enable_rx_buff_generic(struct ixgbe_hw *hw)
{
        u32 secrxreg;

        secrxreg = IXGBE_READ_REG(hw, IXGBE_SECRXCTRL);
        secrxreg &= ~IXGBE_SECRXCTRL_RX_DIS;
        IXGBE_WRITE_REG(hw, IXGBE_SECRXCTRL, secrxreg);
        IXGBE_WRITE_FLUSH(hw);

        return 0;
}

/**
 *  ixgbe_enable_rx_dma_generic - Enable the Rx DMA unit
 *  @hw: pointer to hardware structure
 *  @regval: register value to write to RXCTRL
 *
 *  Enables the Rx DMA unit
 **/
s32 ixgbe_enable_rx_dma_generic(struct ixgbe_hw *hw, u32 regval)
{
        if (regval & IXGBE_RXCTRL_RXEN)
                hw->mac.ops.enable_rx(hw);
        else
                hw->mac.ops.disable_rx(hw);

        return 0;
}

/**
 *  ixgbe_blink_led_start_generic - Blink LED based on index.
 *  @hw: pointer to hardware structure
 *  @index: led number to blink
 **/
s32 ixgbe_blink_led_start_generic(struct ixgbe_hw *hw, u32 index)
{
        ixgbe_link_speed speed = 0;
        bool link_up = false;
        u32 autoc_reg = IXGBE_READ_REG(hw, IXGBE_AUTOC);
        u32 led_reg = IXGBE_READ_REG(hw, IXGBE_LEDCTL);
        bool locked = false;
        s32 ret_val;

        if (index > 3)
                return IXGBE_ERR_PARAM;

        /*
         * Link must be up to auto-blink the LEDs;
         * Force it if link is down.
         */
        hw->mac.ops.check_link(hw, &speed, &link_up, false);

        if (!link_up) {
                ret_val = hw->mac.ops.prot_autoc_read(hw, &locked, &autoc_reg);
                if (ret_val)
                        return ret_val;

                autoc_reg |= IXGBE_AUTOC_AN_RESTART;
                autoc_reg |= IXGBE_AUTOC_FLU;

                ret_val = hw->mac.ops.prot_autoc_write(hw, autoc_reg, locked);
                if (ret_val)
                        return ret_val;

                IXGBE_WRITE_FLUSH(hw);

                usleep_range(10000, 20000);
        }

        led_reg &= ~IXGBE_LED_MODE_MASK(index);
        led_reg |= IXGBE_LED_BLINK(index);
        IXGBE_WRITE_REG(hw, IXGBE_LEDCTL, led_reg);
        IXGBE_WRITE_FLUSH(hw);

        return 0;
}

/**
 *  ixgbe_blink_led_stop_generic - Stop blinking LED based on index.
 *  @hw: pointer to hardware structure
 *  @index: led number to stop blinking
 **/
s32 ixgbe_blink_led_stop_generic(struct ixgbe_hw *hw, u32 index)
{
        u32 autoc_reg = 0;
        u32 led_reg = IXGBE_READ_REG(hw, IXGBE_LEDCTL);
        bool locked = false;
        s32 ret_val;

        if (index > 3)
                return IXGBE_ERR_PARAM;

        ret_val = hw->mac.ops.prot_autoc_read(hw, &locked, &autoc_reg);
        if (ret_val)
                return ret_val;

        autoc_reg &= ~IXGBE_AUTOC_FLU;
        autoc_reg |= IXGBE_AUTOC_AN_RESTART;

        ret_val = hw->mac.ops.prot_autoc_write(hw, autoc_reg, locked);
        if (ret_val)
                return ret_val;

        led_reg &= ~IXGBE_LED_MODE_MASK(index);
        led_reg &= ~IXGBE_LED_BLINK(index);
        led_reg |= IXGBE_LED_LINK_ACTIVE << IXGBE_LED_MODE_SHIFT(index);
        IXGBE_WRITE_REG(hw, IXGBE_LEDCTL, led_reg);
        IXGBE_WRITE_FLUSH(hw);

        return 0;
}

/**
 *  ixgbe_get_san_mac_addr_offset - Get SAN MAC address offset from the EEPROM
 *  @hw: pointer to hardware structure
 *  @san_mac_offset: SAN MAC address offset
 *
 *  This function will read the EEPROM location for the SAN MAC address
 *  pointer, and returns the value at that location.  This is used in both
 *  get and set mac_addr routines.
 **/
static s32 ixgbe_get_san_mac_addr_offset(struct ixgbe_hw *hw,
                                        u16 *san_mac_offset)
{
        s32 ret_val;

        /*
         * First read the EEPROM pointer to see if the MAC addresses are
         * available.
         */
        ret_val = hw->eeprom.ops.read(hw, IXGBE_SAN_MAC_ADDR_PTR,
                                      san_mac_offset);
        if (ret_val)
                hw_err(hw, "eeprom read at offset %d failed\n",
                       IXGBE_SAN_MAC_ADDR_PTR);

        return ret_val;
}

/**
 *  ixgbe_get_san_mac_addr_generic - SAN MAC address retrieval from the EEPROM
 *  @hw: pointer to hardware structure
 *  @san_mac_addr: SAN MAC address
 *
 *  Reads the SAN MAC address from the EEPROM, if it's available.  This is
 *  per-port, so set_lan_id() must be called before reading the addresses.
 *  set_lan_id() is called by identify_sfp(), but this cannot be relied
 *  upon for non-SFP connections, so we must call it here.
 **/
s32 ixgbe_get_san_mac_addr_generic(struct ixgbe_hw *hw, u8 *san_mac_addr)
{
        u16 san_mac_data, san_mac_offset;
        u8 i;
        s32 ret_val;

        /*
         * First read the EEPROM pointer to see if the MAC addresses are
         * available.  If they're not, no point in calling set_lan_id() here.
         */
        ret_val = ixgbe_get_san_mac_addr_offset(hw, &san_mac_offset);
        if (ret_val || san_mac_offset == 0 || san_mac_offset == 0xFFFF)

                goto san_mac_addr_clr;

        /* make sure we know which port we need to program */
        hw->mac.ops.set_lan_id(hw);
        /* apply the port offset to the address offset */
        (hw->bus.func) ? (san_mac_offset += IXGBE_SAN_MAC_ADDR_PORT1_OFFSET) :
                         (san_mac_offset += IXGBE_SAN_MAC_ADDR_PORT0_OFFSET);
        for (i = 0; i < 3; i++) {
                ret_val = hw->eeprom.ops.read(hw, san_mac_offset,
                                              &san_mac_data);
                if (ret_val) {
                        hw_err(hw, "eeprom read at offset %d failed\n",
                               san_mac_offset);
                        goto san_mac_addr_clr;
                }
                san_mac_addr[i * 2] = (u8)(san_mac_data);
                san_mac_addr[i * 2 + 1] = (u8)(san_mac_data >> 8);
                san_mac_offset++;
        }
        return 0;

san_mac_addr_clr:
        /* No addresses available in this EEPROM.  It's not necessarily an
         * error though, so just wipe the local address and return.
         */
        for (i = 0; i < 6; i++)
                san_mac_addr[i] = 0xFF;
        return ret_val;
}

/**
 *  ixgbe_get_pcie_msix_count_generic - Gets MSI-X vector count
 *  @hw: pointer to hardware structure
 *
 *  Read PCIe configuration space, and get the MSI-X vector count from
 *  the capabilities table.
 **/
u16 ixgbe_get_pcie_msix_count_generic(struct ixgbe_hw *hw)
{
        u16 msix_count;
        u16 max_msix_count;
        u16 pcie_offset;

        switch (hw->mac.type) {
        case ixgbe_mac_82598EB:
                pcie_offset = IXGBE_PCIE_MSIX_82598_CAPS;
                max_msix_count = IXGBE_MAX_MSIX_VECTORS_82598;
                break;
        case ixgbe_mac_82599EB:
        case ixgbe_mac_X540:
        case ixgbe_mac_X550:
        case ixgbe_mac_X550EM_x:
        case ixgbe_mac_x550em_a:
                pcie_offset = IXGBE_PCIE_MSIX_82599_CAPS;
                max_msix_count = IXGBE_MAX_MSIX_VECTORS_82599;
                break;
        default:
                return 1;
        }

        msix_count = ixgbe_read_pci_cfg_word(hw, pcie_offset);
        if (ixgbe_removed(hw->hw_addr))
                msix_count = 0;
        msix_count &= IXGBE_PCIE_MSIX_TBL_SZ_MASK;

        /* MSI-X count is zero-based in HW */
        msix_count++;

        if (msix_count > max_msix_count)
                msix_count = max_msix_count;

        return msix_count;
}

/**
 *  ixgbe_clear_vmdq_generic - Disassociate a VMDq pool index from a rx address
 *  @hw: pointer to hardware struct
 *  @rar: receive address register index to disassociate
 *  @vmdq: VMDq pool index to remove from the rar
 **/
s32 ixgbe_clear_vmdq_generic(struct ixgbe_hw *hw, u32 rar, u32 vmdq)
{
        u32 mpsar_lo, mpsar_hi;
        u32 rar_entries = hw->mac.num_rar_entries;

        /* Make sure we are using a valid rar index range */
        if (rar >= rar_entries) {
                hw_dbg(hw, "RAR index %d is out of range.\n", rar);
                return IXGBE_ERR_INVALID_ARGUMENT;
        }

        mpsar_lo = IXGBE_READ_REG(hw, IXGBE_MPSAR_LO(rar));
        mpsar_hi = IXGBE_READ_REG(hw, IXGBE_MPSAR_HI(rar));

        if (ixgbe_removed(hw->hw_addr))
                return 0;

        if (!mpsar_lo && !mpsar_hi)
                return 0;

        if (vmdq == IXGBE_CLEAR_VMDQ_ALL) {
                if (mpsar_lo) {
                        IXGBE_WRITE_REG(hw, IXGBE_MPSAR_LO(rar), 0);
                        mpsar_lo = 0;
                }
                if (mpsar_hi) {
                        IXGBE_WRITE_REG(hw, IXGBE_MPSAR_HI(rar), 0);
                        mpsar_hi = 0;
                }
        } else if (vmdq < 32) {
                mpsar_lo &= ~BIT(vmdq);
                IXGBE_WRITE_REG(hw, IXGBE_MPSAR_LO(rar), mpsar_lo);
        } else {
                mpsar_hi &= ~BIT(vmdq - 32);
                IXGBE_WRITE_REG(hw, IXGBE_MPSAR_HI(rar), mpsar_hi);
        }

        /* was that the last pool using this rar? */
        if (mpsar_lo == 0 && mpsar_hi == 0 &&
            rar != 0 && rar != hw->mac.san_mac_rar_index)
                hw->mac.ops.clear_rar(hw, rar);

        return 0;
}

/**
 *  ixgbe_set_vmdq_generic - Associate a VMDq pool index with a rx address
 *  @hw: pointer to hardware struct
 *  @rar: receive address register index to associate with a VMDq index
 *  @vmdq: VMDq pool index
 **/
s32 ixgbe_set_vmdq_generic(struct ixgbe_hw *hw, u32 rar, u32 vmdq)
{
        u32 mpsar;
        u32 rar_entries = hw->mac.num_rar_entries;

        /* Make sure we are using a valid rar index range */
        if (rar >= rar_entries) {
                hw_dbg(hw, "RAR index %d is out of range.\n", rar);
                return IXGBE_ERR_INVALID_ARGUMENT;
        }

        if (vmdq < 32) {
                mpsar = IXGBE_READ_REG(hw, IXGBE_MPSAR_LO(rar));
                mpsar |= BIT(vmdq);
                IXGBE_WRITE_REG(hw, IXGBE_MPSAR_LO(rar), mpsar);
        } else {
                mpsar = IXGBE_READ_REG(hw, IXGBE_MPSAR_HI(rar));
                mpsar |= BIT(vmdq - 32);
                IXGBE_WRITE_REG(hw, IXGBE_MPSAR_HI(rar), mpsar);
        }
        return 0;
}

/**
 *  This function should only be involved in the IOV mode.
 *  In IOV mode, Default pool is next pool after the number of
 *  VFs advertized and not 0.
 *  MPSAR table needs to be updated for SAN_MAC RAR [hw->mac.san_mac_rar_index]
 *
 *  ixgbe_set_vmdq_san_mac - Associate default VMDq pool index with a rx address
 *  @hw: pointer to hardware struct
 *  @vmdq: VMDq pool index
 **/
s32 ixgbe_set_vmdq_san_mac_generic(struct ixgbe_hw *hw, u32 vmdq)
{
        u32 rar = hw->mac.san_mac_rar_index;

        if (vmdq < 32) {
                IXGBE_WRITE_REG(hw, IXGBE_MPSAR_LO(rar), BIT(vmdq));
                IXGBE_WRITE_REG(hw, IXGBE_MPSAR_HI(rar), 0);
        } else {
                IXGBE_WRITE_REG(hw, IXGBE_MPSAR_LO(rar), 0);
                IXGBE_WRITE_REG(hw, IXGBE_MPSAR_HI(rar), BIT(vmdq - 32));
        }

        return 0;
}

/**
 *  ixgbe_init_uta_tables_generic - Initialize the Unicast Table Array
 *  @hw: pointer to hardware structure
 **/
s32 ixgbe_init_uta_tables_generic(struct ixgbe_hw *hw)
{
        int i;

        for (i = 0; i < 128; i++)
                IXGBE_WRITE_REG(hw, IXGBE_UTA(i), 0);

        return 0;
}

/**
 *  ixgbe_find_vlvf_slot - find the vlanid or the first empty slot
 *  @hw: pointer to hardware structure
 *  @vlan: VLAN id to write to VLAN filter
 *
 *  return the VLVF index where this VLAN id should be placed
 *
 **/
static s32 ixgbe_find_vlvf_slot(struct ixgbe_hw *hw, u32 vlan, bool vlvf_bypass)
{
        s32 regindex, first_empty_slot;
        u32 bits;

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

        /* if vlvf_bypass is set we don't want to use an empty slot, we
         * will simply bypass the VLVF if there are no entries present in the
         * VLVF that contain our VLAN
         */
        first_empty_slot = vlvf_bypass ? IXGBE_ERR_NO_SPACE : 0;

        /* add VLAN enable bit for comparison */
        vlan |= IXGBE_VLVF_VIEN;

        /* Search for the vlan id in the VLVF entries. Save off the first empty
         * slot found along the way.
         *
         * pre-decrement loop covering (IXGBE_VLVF_ENTRIES - 1) .. 1
         */
        for (regindex = IXGBE_VLVF_ENTRIES; --regindex;) {
                bits = IXGBE_READ_REG(hw, IXGBE_VLVF(regindex));
                if (bits == vlan)
                        return regindex;
                if (!first_empty_slot && !bits)
                        first_empty_slot = regindex;
        }

        /* If we are here then we didn't find the VLAN.  Return first empty
         * slot we found during our search, else error.
         */
        if (!first_empty_slot)
                hw_dbg(hw, "No space in VLVF.\n");

        return first_empty_slot ? : IXGBE_ERR_NO_SPACE;
}

/**
 *  ixgbe_set_vfta_generic - Set VLAN filter table
 *  @hw: pointer to hardware structure
 *  @vlan: VLAN id to write to VLAN filter
 *  @vind: VMDq output index that maps queue to VLAN id in VFVFB
 *  @vlan_on: boolean flag to turn on/off VLAN in VFVF
 *  @vlvf_bypass: boolean flag indicating updating default pool is okay
 *
 *  Turn on/off specified VLAN in the VLAN filter table.
 **/
s32 ixgbe_set_vfta_generic(struct ixgbe_hw *hw, u32 vlan, u32 vind,
                           bool vlan_on, bool vlvf_bypass)
{
        u32 regidx, vfta_delta, vfta, bits;
        s32 vlvf_index;

        if ((vlan > 4095) || (vind > 63))
                return IXGBE_ERR_PARAM;

        /*
         * this is a 2 part operation - first the VFTA, then the
         * VLVF and VLVFB if VT Mode is set
         * We don't write the VFTA until we know the VLVF part succeeded.
         */

        /* Part 1
         * The VFTA is a bitstring made up of 128 32-bit registers
         * that enable the particular VLAN id, much like the MTA:
         *    bits[11-5]: which register
         *    bits[4-0]:  which bit in the register
         */
        regidx = vlan / 32;
        vfta_delta = BIT(vlan % 32);
        vfta = IXGBE_READ_REG(hw, IXGBE_VFTA(regidx));

        /* vfta_delta represents the difference between the current value
         * of vfta and the value we want in the register.  Since the diff
         * is an XOR mask we can just update vfta using an XOR.
         */
        vfta_delta &= vlan_on ? ~vfta : vfta;
        vfta ^= vfta_delta;

        /* Part 2
         * If VT Mode is set
         *   Either vlan_on
         *     make sure the vlan is in VLVF
         *     set the vind bit in the matching VLVFB
         *   Or !vlan_on
         *     clear the pool bit and possibly the vind
         */
        if (!(IXGBE_READ_REG(hw, IXGBE_VT_CTL) & IXGBE_VT_CTL_VT_ENABLE))
                goto vfta_update;

        vlvf_index = ixgbe_find_vlvf_slot(hw, vlan, vlvf_bypass);
        if (vlvf_index < 0) {
                if (vlvf_bypass)
                        goto vfta_update;
                return vlvf_index;
        }

        bits = IXGBE_READ_REG(hw, IXGBE_VLVFB(vlvf_index * 2 + vind / 32));

        /* set the pool bit */
        bits |= BIT(vind % 32);
        if (vlan_on)
                goto vlvf_update;

        /* clear the pool bit */
        bits ^= BIT(vind % 32);

        if (!bits &&
            !IXGBE_READ_REG(hw, IXGBE_VLVFB(vlvf_index * 2 + 1 - vind / 32))) {
                /* Clear VFTA first, then disable VLVF.  Otherwise
                 * we run the risk of stray packets leaking into
                 * the PF via the default pool
                 */
                if (vfta_delta)
                        IXGBE_WRITE_REG(hw, IXGBE_VFTA(regidx), vfta);

                /* disable VLVF and clear remaining bit from pool */
                IXGBE_WRITE_REG(hw, IXGBE_VLVF(vlvf_index), 0);
                IXGBE_WRITE_REG(hw, IXGBE_VLVFB(vlvf_index * 2 + vind / 32), 0);

                return 0;
        }

        /* If there are still bits set in the VLVFB registers
         * for the VLAN ID indicated we need to see if the
         * caller is requesting that we clear the VFTA entry bit.
         * If the caller has requested that we clear the VFTA
         * entry bit but there are still pools/VFs using this VLAN
         * ID entry then ignore the request.  We're not worried
         * about the case where we're turning the VFTA VLAN ID
         * entry bit on, only when requested to turn it off as
         * there may be multiple pools and/or VFs using the
         * VLAN ID entry.  In that case we cannot clear the
         * VFTA bit until all pools/VFs using that VLAN ID have also
         * been cleared.  This will be indicated by "bits" being
         * zero.
         */
        vfta_delta = 0;

vlvf_update:
        /* record pool change and enable VLAN ID if not already enabled */
        IXGBE_WRITE_REG(hw, IXGBE_VLVFB(vlvf_index * 2 + vind / 32), bits);
        IXGBE_WRITE_REG(hw, IXGBE_VLVF(vlvf_index), IXGBE_VLVF_VIEN | vlan);

vfta_update:
        /* Update VFTA now that we are ready for traffic */
        if (vfta_delta)
                IXGBE_WRITE_REG(hw, IXGBE_VFTA(regidx), vfta);

        return 0;
}

/**
 *  ixgbe_clear_vfta_generic - Clear VLAN filter table
 *  @hw: pointer to hardware structure
 *
 *  Clears the VLAN filer table, and the VMDq index associated with the filter
 **/
s32 ixgbe_clear_vfta_generic(struct ixgbe_hw *hw)
{
        u32 offset;

        for (offset = 0; offset < hw->mac.vft_size; offset++)
                IXGBE_WRITE_REG(hw, IXGBE_VFTA(offset), 0);

        for (offset = 0; offset < IXGBE_VLVF_ENTRIES; offset++) {
                IXGBE_WRITE_REG(hw, IXGBE_VLVF(offset), 0);
                IXGBE_WRITE_REG(hw, IXGBE_VLVFB(offset * 2), 0);
                IXGBE_WRITE_REG(hw, IXGBE_VLVFB(offset * 2 + 1), 0);
        }

        return 0;
}

/**
 *  ixgbe_need_crosstalk_fix - Determine if we need to do cross talk fix
 *  @hw: pointer to hardware structure
 *
 *  Contains the logic to identify if we need to verify link for the
 *  crosstalk fix
 **/
static bool ixgbe_need_crosstalk_fix(struct ixgbe_hw *hw)
{
        /* Does FW say we need the fix */
        if (!hw->need_crosstalk_fix)
                return false;

        /* Only consider SFP+ PHYs i.e. media type fiber */
        switch (hw->mac.ops.get_media_type(hw)) {
        case ixgbe_media_type_fiber:
        case ixgbe_media_type_fiber_qsfp:
                break;
        default:
                return false;
        }

        return true;
}

/**
 *  ixgbe_check_mac_link_generic - Determine link and speed status
 *  @hw: pointer to hardware structure
 *  @speed: pointer to link speed
 *  @link_up: true when link is up
 *  @link_up_wait_to_complete: bool used to wait for link up or not
 *
 *  Reads the links register to determine if link is up and the current speed
 **/
s32 ixgbe_check_mac_link_generic(struct ixgbe_hw *hw, ixgbe_link_speed *speed,
                                 bool *link_up, bool link_up_wait_to_complete)
{
        u32 links_reg, links_orig;
        u32 i;

        /* If Crosstalk fix enabled do the sanity check of making sure
         * the SFP+ cage is full.
         */
        if (ixgbe_need_crosstalk_fix(hw)) {
                u32 sfp_cage_full;

                switch (hw->mac.type) {
                case ixgbe_mac_82599EB:
                        sfp_cage_full = IXGBE_READ_REG(hw, IXGBE_ESDP) &
                                        IXGBE_ESDP_SDP2;
                        break;
                case ixgbe_mac_X550EM_x:
                case ixgbe_mac_x550em_a:
                        sfp_cage_full = IXGBE_READ_REG(hw, IXGBE_ESDP) &
                                        IXGBE_ESDP_SDP0;
                        break;
                default:
                        /* sanity check - No SFP+ devices here */
                        sfp_cage_full = false;
                        break;
                }

                if (!sfp_cage_full) {
                        *link_up = false;
                        *speed = IXGBE_LINK_SPEED_UNKNOWN;
                        return 0;
                }
        }

        /* clear the old state */
        links_orig = IXGBE_READ_REG(hw, IXGBE_LINKS);

        links_reg = IXGBE_READ_REG(hw, IXGBE_LINKS);

        if (links_orig != links_reg) {
                hw_dbg(hw, "LINKS changed from %08X to %08X\n",
                       links_orig, links_reg);
        }

        if (link_up_wait_to_complete) {
                for (i = 0; i < IXGBE_LINK_UP_TIME; i++) {
                        if (links_reg & IXGBE_LINKS_UP) {
                                *link_up = true;
                                break;
                        } else {
                                *link_up = false;
                        }
                        msleep(100);
                        links_reg = IXGBE_READ_REG(hw, IXGBE_LINKS);
                }
        } else {
                if (links_reg & IXGBE_LINKS_UP)
                        *link_up = true;
                else
                        *link_up = false;
        }

        switch (links_reg & IXGBE_LINKS_SPEED_82599) {
        case IXGBE_LINKS_SPEED_10G_82599:
                if ((hw->mac.type >= ixgbe_mac_X550) &&
                    (links_reg & IXGBE_LINKS_SPEED_NON_STD))
                        *speed = IXGBE_LINK_SPEED_2_5GB_FULL;
                else
                        *speed = IXGBE_LINK_SPEED_10GB_FULL;
                break;
        case IXGBE_LINKS_SPEED_1G_82599:
                *speed = IXGBE_LINK_SPEED_1GB_FULL;
                break;
        case IXGBE_LINKS_SPEED_100_82599:
                if ((hw->mac.type >= ixgbe_mac_X550) &&
                    (links_reg & IXGBE_LINKS_SPEED_NON_STD))
                        *speed = IXGBE_LINK_SPEED_5GB_FULL;
                else
                        *speed = IXGBE_LINK_SPEED_100_FULL;
                break;
        default:
                *speed = IXGBE_LINK_SPEED_UNKNOWN;
        }

        return 0;
}

/**
 *  ixgbe_get_wwn_prefix_generic - Get alternative WWNN/WWPN prefix from
 *  the EEPROM
 *  @hw: pointer to hardware structure
 *  @wwnn_prefix: the alternative WWNN prefix
 *  @wwpn_prefix: the alternative WWPN prefix
 *
 *  This function will read the EEPROM from the alternative SAN MAC address
 *  block to check the support for the alternative WWNN/WWPN prefix support.
 **/
s32 ixgbe_get_wwn_prefix_generic(struct ixgbe_hw *hw, u16 *wwnn_prefix,
                                        u16 *wwpn_prefix)
{
        u16 offset, caps;
        u16 alt_san_mac_blk_offset;

        /* clear output first */
        *wwnn_prefix = 0xFFFF;
        *wwpn_prefix = 0xFFFF;

        /* check if alternative SAN MAC is supported */
        offset = IXGBE_ALT_SAN_MAC_ADDR_BLK_PTR;
        if (hw->eeprom.ops.read(hw, offset, &alt_san_mac_blk_offset))
                goto wwn_prefix_err;

        if ((alt_san_mac_blk_offset == 0) ||
            (alt_san_mac_blk_offset == 0xFFFF))
                return 0;

        /* check capability in alternative san mac address block */
        offset = alt_san_mac_blk_offset + IXGBE_ALT_SAN_MAC_ADDR_CAPS_OFFSET;
        if (hw->eeprom.ops.read(hw, offset, &caps))
                goto wwn_prefix_err;
        if (!(caps & IXGBE_ALT_SAN_MAC_ADDR_CAPS_ALTWWN))
                return 0;

        /* get the corresponding prefix for WWNN/WWPN */
        offset = alt_san_mac_blk_offset + IXGBE_ALT_SAN_MAC_ADDR_WWNN_OFFSET;
        if (hw->eeprom.ops.read(hw, offset, wwnn_prefix))
                hw_err(hw, "eeprom read at offset %d failed\n", offset);

        offset = alt_san_mac_blk_offset + IXGBE_ALT_SAN_MAC_ADDR_WWPN_OFFSET;
        if (hw->eeprom.ops.read(hw, offset, wwpn_prefix))
                goto wwn_prefix_err;

        return 0;

wwn_prefix_err:
        hw_err(hw, "eeprom read at offset %d failed\n", offset);
        return 0;
}

/**
 *  ixgbe_set_mac_anti_spoofing - Enable/Disable MAC anti-spoofing
 *  @hw: pointer to hardware structure
 *  @enable: enable or disable switch for MAC anti-spoofing
 *  @vf: Virtual Function pool - VF Pool to set for MAC anti-spoofing
 *
 **/
void ixgbe_set_mac_anti_spoofing(struct ixgbe_hw *hw, bool enable, int vf)
{
        int vf_target_reg = vf >> 3;
        int vf_target_shift = vf % 8;
        u32 pfvfspoof;

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

        pfvfspoof = IXGBE_READ_REG(hw, IXGBE_PFVFSPOOF(vf_target_reg));
        if (enable)
                pfvfspoof |= BIT(vf_target_shift);
        else
                pfvfspoof &= ~BIT(vf_target_shift);
        IXGBE_WRITE_REG(hw, IXGBE_PFVFSPOOF(vf_target_reg), pfvfspoof);
}

/**
 *  ixgbe_set_vlan_anti_spoofing - Enable/Disable VLAN anti-spoofing
 *  @hw: pointer to hardware structure
 *  @enable: enable or disable switch for VLAN anti-spoofing
 *  @pf: Virtual Function pool - VF Pool to set for VLAN anti-spoofing
 *
 **/
void ixgbe_set_vlan_anti_spoofing(struct ixgbe_hw *hw, bool enable, int vf)
{
        int vf_target_reg = vf >> 3;
        int vf_target_shift = vf % 8 + IXGBE_SPOOF_VLANAS_SHIFT;
        u32 pfvfspoof;

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

        pfvfspoof = IXGBE_READ_REG(hw, IXGBE_PFVFSPOOF(vf_target_reg));
        if (enable)
                pfvfspoof |= BIT(vf_target_shift);
        else
                pfvfspoof &= ~BIT(vf_target_shift);
        IXGBE_WRITE_REG(hw, IXGBE_PFVFSPOOF(vf_target_reg), pfvfspoof);
}

/**
 *  ixgbe_get_device_caps_generic - Get additional device capabilities
 *  @hw: pointer to hardware structure
 *  @device_caps: the EEPROM word with the extra device capabilities
 *
 *  This function will read the EEPROM location for the device capabilities,
 *  and return the word through device_caps.
 **/
s32 ixgbe_get_device_caps_generic(struct ixgbe_hw *hw, u16 *device_caps)
{
        hw->eeprom.ops.read(hw, IXGBE_DEVICE_CAPS, device_caps);

        return 0;
}

/**
 * ixgbe_set_rxpba_generic - Initialize RX packet buffer
 * @hw: pointer to hardware structure
 * @num_pb: number of packet buffers to allocate
 * @headroom: reserve n KB of headroom
 * @strategy: packet buffer allocation strategy
 **/
void ixgbe_set_rxpba_generic(struct ixgbe_hw *hw,
                             int num_pb,
                             u32 headroom,
                             int strategy)
{
        u32 pbsize = hw->mac.rx_pb_size;
        int i = 0;
        u32 rxpktsize, txpktsize, txpbthresh;

        /* Reserve headroom */
        pbsize -= headroom;

        if (!num_pb)
                num_pb = 1;

        /* Divide remaining packet buffer space amongst the number
         * of packet buffers requested using supplied strategy.
         */
        switch (strategy) {
        case (PBA_STRATEGY_WEIGHTED):
                /* pba_80_48 strategy weight first half of packet buffer with
                 * 5/8 of the packet buffer space.
                 */
                rxpktsize = ((pbsize * 5 * 2) / (num_pb * 8));
                pbsize -= rxpktsize * (num_pb / 2);
                rxpktsize <<= IXGBE_RXPBSIZE_SHIFT;
                for (; i < (num_pb / 2); i++)
                        IXGBE_WRITE_REG(hw, IXGBE_RXPBSIZE(i), rxpktsize);
                /* Fall through to configure remaining packet buffers */
        case (PBA_STRATEGY_EQUAL):
                /* Divide the remaining Rx packet buffer evenly among the TCs */
                rxpktsize = (pbsize / (num_pb - i)) << IXGBE_RXPBSIZE_SHIFT;
                for (; i < num_pb; i++)
                        IXGBE_WRITE_REG(hw, IXGBE_RXPBSIZE(i), rxpktsize);
                break;
        default:
                break;
        }

        /*
         * Setup Tx packet buffer and threshold equally for all TCs
         * TXPBTHRESH register is set in K so divide by 1024 and subtract
         * 10 since the largest packet we support is just over 9K.
         */
        txpktsize = IXGBE_TXPBSIZE_MAX / num_pb;
        txpbthresh = (txpktsize / 1024) - IXGBE_TXPKT_SIZE_MAX;
        for (i = 0; i < num_pb; i++) {
                IXGBE_WRITE_REG(hw, IXGBE_TXPBSIZE(i), txpktsize);
                IXGBE_WRITE_REG(hw, IXGBE_TXPBTHRESH(i), txpbthresh);
        }

        /* Clear unused TCs, if any, to zero buffer size*/
        for (; i < IXGBE_MAX_PB; i++) {
                IXGBE_WRITE_REG(hw, IXGBE_RXPBSIZE(i), 0);
                IXGBE_WRITE_REG(hw, IXGBE_TXPBSIZE(i), 0);
                IXGBE_WRITE_REG(hw, IXGBE_TXPBTHRESH(i), 0);
        }
}

/**
 *  ixgbe_calculate_checksum - Calculate checksum for buffer
 *  @buffer: pointer to EEPROM
 *  @length: size of EEPROM to calculate a checksum for
 *
 *  Calculates the checksum for some buffer on a specified length.  The
 *  checksum calculated is returned.
 **/
static u8 ixgbe_calculate_checksum(u8 *buffer, u32 length)
{
        u32 i;
        u8 sum = 0;

        if (!buffer)
                return 0;

        for (i = 0; i < length; i++)
                sum += buffer[i];

        return (u8) (0 - sum);
}

/**
 *  ixgbe_host_interface_command - Issue command to manageability block
 *  @hw: pointer to the HW structure
 *  @buffer: contains the command to write and where the return status will
 *           be placed
 *  @length: length of buffer, must be multiple of 4 bytes
 *  @timeout: time in ms to wait for command completion
 *  @return_data: read and return data from the buffer (true) or not (false)
 *  Needed because FW structures are big endian and decoding of
 *  these fields can be 8 bit or 16 bit based on command. Decoding
 *  is not easily understood without making a table of commands.
 *  So we will leave this up to the caller to read back the data
 *  in these cases.
 *
 *  Communicates with the manageability block.  On success return 0
 *  else return IXGBE_ERR_HOST_INTERFACE_COMMAND.
 **/
s32 ixgbe_host_interface_command(struct ixgbe_hw *hw, void *buffer,
                                 u32 length, u32 timeout,
                                 bool return_data)
{
        u32 hdr_size = sizeof(struct ixgbe_hic_hdr);
        u32 hicr, i, bi, fwsts;
        u16 buf_len, dword_len;
        union {
                struct ixgbe_hic_hdr hdr;
                u32 u32arr[1];
        } *bp = buffer;
        s32 status;

        if (!length || length > IXGBE_HI_MAX_BLOCK_BYTE_LENGTH) {
                hw_dbg(hw, "Buffer length failure buffersize-%d.\n", length);
                return IXGBE_ERR_HOST_INTERFACE_COMMAND;
        }
        /* Take management host interface semaphore */
        status = hw->mac.ops.acquire_swfw_sync(hw, IXGBE_GSSR_SW_MNG_SM);
        if (status)
                return status;

        /* Set bit 9 of FWSTS clearing FW reset indication */
        fwsts = IXGBE_READ_REG(hw, IXGBE_FWSTS);
        IXGBE_WRITE_REG(hw, IXGBE_FWSTS, fwsts | IXGBE_FWSTS_FWRI);

        /* Check that the host interface is enabled. */
        hicr = IXGBE_READ_REG(hw, IXGBE_HICR);
        if (!(hicr & IXGBE_HICR_EN)) {
                hw_dbg(hw, "IXGBE_HOST_EN bit disabled.\n");
                status = IXGBE_ERR_HOST_INTERFACE_COMMAND;
                goto rel_out;
        }

        /* Calculate length in DWORDs. We must be DWORD aligned */
        if (length % sizeof(u32)) {
                hw_dbg(hw, "Buffer length failure, not aligned to dword");
                status = IXGBE_ERR_INVALID_ARGUMENT;
                goto rel_out;
        }

        dword_len = length >> 2;

        /* The device driver writes the relevant command block
         * into the ram area.
         */
        for (i = 0; i < dword_len; i++)
                IXGBE_WRITE_REG_ARRAY(hw, IXGBE_FLEX_MNG,
                                      i, cpu_to_le32(bp->u32arr[i]));

        /* Setting this bit tells the ARC that a new command is pending. */
        IXGBE_WRITE_REG(hw, IXGBE_HICR, hicr | IXGBE_HICR_C);

        for (i = 0; i < timeout; i++) {
                hicr = IXGBE_READ_REG(hw, IXGBE_HICR);
                if (!(hicr & IXGBE_HICR_C))
                        break;
                usleep_range(1000, 2000);
        }

        /* Check command successful completion. */
        if ((timeout && i == timeout) ||
            !(IXGBE_READ_REG(hw, IXGBE_HICR) & IXGBE_HICR_SV)) {
                hw_dbg(hw, "Command has failed with no status valid.\n");
                status = IXGBE_ERR_HOST_INTERFACE_COMMAND;
                goto rel_out;
        }

        if (!return_data)
                goto rel_out;

        /* Calculate length in DWORDs */
        dword_len = hdr_size >> 2;

        /* first pull in the header so we know the buffer length */
        for (bi = 0; bi < dword_len; bi++) {
                bp->u32arr[bi] = IXGBE_READ_REG_ARRAY(hw, IXGBE_FLEX_MNG, bi);
                le32_to_cpus(&bp->u32arr[bi]);
        }

        /* If there is any thing in data position pull it in */
        buf_len = bp->hdr.buf_len;
        if (!buf_len)
                goto rel_out;

        if (length < round_up(buf_len, 4) + hdr_size) {
                hw_dbg(hw, "Buffer not large enough for reply message.\n");
                status = IXGBE_ERR_HOST_INTERFACE_COMMAND;
                goto rel_out;
        }

        /* Calculate length in DWORDs, add 3 for odd lengths */
        dword_len = (buf_len + 3) >> 2;

        /* Pull in the rest of the buffer (bi is where we left off) */
        for (; bi <= dword_len; bi++) {
                bp->u32arr[bi] = IXGBE_READ_REG_ARRAY(hw, IXGBE_FLEX_MNG, bi);
                le32_to_cpus(&bp->u32arr[bi]);
        }

rel_out:
        hw->mac.ops.release_swfw_sync(hw, IXGBE_GSSR_SW_MNG_SM);

        return status;
}

/**
 *  ixgbe_set_fw_drv_ver_generic - Sends driver version to firmware
 *  @hw: pointer to the HW structure
 *  @maj: driver version major number
 *  @min: driver version minor number
 *  @build: driver version build number
 *  @sub: driver version sub build number
 *
 *  Sends driver version number to firmware through the manageability
 *  block.  On success return 0
 *  else returns IXGBE_ERR_SWFW_SYNC when encountering an error acquiring
 *  semaphore or IXGBE_ERR_HOST_INTERFACE_COMMAND when command fails.
 **/
s32 ixgbe_set_fw_drv_ver_generic(struct ixgbe_hw *hw, u8 maj, u8 min,
                                 u8 build, u8 sub)
{
        struct ixgbe_hic_drv_info fw_cmd;
        int i;
        s32 ret_val;

        fw_cmd.hdr.cmd = FW_CEM_CMD_DRIVER_INFO;
        fw_cmd.hdr.buf_len = FW_CEM_CMD_DRIVER_INFO_LEN;
        fw_cmd.hdr.cmd_or_resp.cmd_resv = FW_CEM_CMD_RESERVED;
        fw_cmd.port_num = hw->bus.func;
        fw_cmd.ver_maj = maj;
        fw_cmd.ver_min = min;
        fw_cmd.ver_build = build;
        fw_cmd.ver_sub = sub;
        fw_cmd.hdr.checksum = 0;
        fw_cmd.hdr.checksum = ixgbe_calculate_checksum((u8 *)&fw_cmd,
                                (FW_CEM_HDR_LEN + fw_cmd.hdr.buf_len));
        fw_cmd.pad = 0;
        fw_cmd.pad2 = 0;

        for (i = 0; i <= FW_CEM_MAX_RETRIES; i++) {
                ret_val = ixgbe_host_interface_command(hw, &fw_cmd,
                                                       sizeof(fw_cmd),
                                                       IXGBE_HI_COMMAND_TIMEOUT,
                                                       true);
                if (ret_val != 0)
                        continue;

                if (fw_cmd.hdr.cmd_or_resp.ret_status ==
                    FW_CEM_RESP_STATUS_SUCCESS)
                        ret_val = 0;
                else
                        ret_val = IXGBE_ERR_HOST_INTERFACE_COMMAND;

                break;
        }

        return ret_val;
}

/**
 * ixgbe_clear_tx_pending - Clear pending TX work from the PCIe fifo
 * @hw: pointer to the hardware structure
 *
 * The 82599 and x540 MACs can experience issues if TX work is still pending
 * when a reset occurs.  This function prevents this by flushing the PCIe
 * buffers on the system.
 **/
void ixgbe_clear_tx_pending(struct ixgbe_hw *hw)
{
        u32 gcr_ext, hlreg0, i, poll;
        u16 value;

        /*
         * If double reset is not requested then all transactions should
         * already be clear and as such there is no work to do
         */
        if (!(hw->mac.flags & IXGBE_FLAGS_DOUBLE_RESET_REQUIRED))
                return;

        /*
         * Set loopback enable to prevent any transmits from being sent
         * should the link come up.  This assumes that the RXCTRL.RXEN bit
         * has already been cleared.
         */
        hlreg0 = IXGBE_READ_REG(hw, IXGBE_HLREG0);
        IXGBE_WRITE_REG(hw, IXGBE_HLREG0, hlreg0 | IXGBE_HLREG0_LPBK);

        /* wait for a last completion before clearing buffers */
        IXGBE_WRITE_FLUSH(hw);
        usleep_range(3000, 6000);

        /* Before proceeding, make sure that the PCIe block does not have
         * transactions pending.
         */
        poll = ixgbe_pcie_timeout_poll(hw);
        for (i = 0; i < poll; i++) {
                usleep_range(100, 200);
                value = ixgbe_read_pci_cfg_word(hw, IXGBE_PCI_DEVICE_STATUS);
                if (ixgbe_removed(hw->hw_addr))
                        break;
                if (!(value & IXGBE_PCI_DEVICE_STATUS_TRANSACTION_PENDING))
                        break;
        }

        /* initiate cleaning flow for buffers in the PCIe transaction layer */
        gcr_ext = IXGBE_READ_REG(hw, IXGBE_GCR_EXT);
        IXGBE_WRITE_REG(hw, IXGBE_GCR_EXT,
                        gcr_ext | IXGBE_GCR_EXT_BUFFERS_CLEAR);

        /* Flush all writes and allow 20usec for all transactions to clear */
        IXGBE_WRITE_FLUSH(hw);
        udelay(20);

        /* restore previous register values */
        IXGBE_WRITE_REG(hw, IXGBE_GCR_EXT, gcr_ext);
        IXGBE_WRITE_REG(hw, IXGBE_HLREG0, hlreg0);
}

static const u8 ixgbe_emc_temp_data[4] = {
        IXGBE_EMC_INTERNAL_DATA,
        IXGBE_EMC_DIODE1_DATA,
        IXGBE_EMC_DIODE2_DATA,
        IXGBE_EMC_DIODE3_DATA
};
static const u8 ixgbe_emc_therm_limit[4] = {
        IXGBE_EMC_INTERNAL_THERM_LIMIT,
        IXGBE_EMC_DIODE1_THERM_LIMIT,
        IXGBE_EMC_DIODE2_THERM_LIMIT,
        IXGBE_EMC_DIODE3_THERM_LIMIT
};

/**
 *  ixgbe_get_ets_data - Extracts the ETS bit data
 *  @hw: pointer to hardware structure
 *  @ets_cfg: extected ETS data
 *  @ets_offset: offset of ETS data
 *
 *  Returns error code.
 **/
static s32 ixgbe_get_ets_data(struct ixgbe_hw *hw, u16 *ets_cfg,
                              u16 *ets_offset)
{
        s32 status;

        status = hw->eeprom.ops.read(hw, IXGBE_ETS_CFG, ets_offset);
        if (status)
                return status;

        if ((*ets_offset == 0x0000) || (*ets_offset == 0xFFFF))
                return IXGBE_NOT_IMPLEMENTED;

        status = hw->eeprom.ops.read(hw, *ets_offset, ets_cfg);
        if (status)
                return status;

        if ((*ets_cfg & IXGBE_ETS_TYPE_MASK) != IXGBE_ETS_TYPE_EMC_SHIFTED)
                return IXGBE_NOT_IMPLEMENTED;

        return 0;
}

/**
 *  ixgbe_get_thermal_sensor_data - Gathers thermal sensor data
 *  @hw: pointer to hardware structure
 *
 *  Returns the thermal sensor data structure
 **/
s32 ixgbe_get_thermal_sensor_data_generic(struct ixgbe_hw *hw)
{
        s32 status;
        u16 ets_offset;
        u16 ets_cfg;
        u16 ets_sensor;
        u8  num_sensors;
        u8  i;
        struct ixgbe_thermal_sensor_data *data = &hw->mac.thermal_sensor_data;

        /* Only support thermal sensors attached to physical port 0 */
        if ((IXGBE_READ_REG(hw, IXGBE_STATUS) & IXGBE_STATUS_LAN_ID_1))
                return IXGBE_NOT_IMPLEMENTED;

        status = ixgbe_get_ets_data(hw, &ets_cfg, &ets_offset);
        if (status)
                return status;

        num_sensors = (ets_cfg & IXGBE_ETS_NUM_SENSORS_MASK);
        if (num_sensors > IXGBE_MAX_SENSORS)
                num_sensors = IXGBE_MAX_SENSORS;

        for (i = 0; i < num_sensors; i++) {
                u8  sensor_index;
                u8  sensor_location;

                status = hw->eeprom.ops.read(hw, (ets_offset + 1 + i),
                                             &ets_sensor);
                if (status)
                        return status;

                sensor_index = ((ets_sensor & IXGBE_ETS_DATA_INDEX_MASK) >>
                                IXGBE_ETS_DATA_INDEX_SHIFT);
                sensor_location = ((ets_sensor & IXGBE_ETS_DATA_LOC_MASK) >>
                                   IXGBE_ETS_DATA_LOC_SHIFT);

                if (sensor_location != 0) {
                        status = hw->phy.ops.read_i2c_byte(hw,
                                        ixgbe_emc_temp_data[sensor_index],
                                        IXGBE_I2C_THERMAL_SENSOR_ADDR,
                                        &data->sensor[i].temp);
                        if (status)
                                return status;
                }
        }

        return 0;
}

/**
 * ixgbe_init_thermal_sensor_thresh_generic - Inits thermal sensor thresholds
 * @hw: pointer to hardware structure
 *
 * Inits the thermal sensor thresholds according to the NVM map
 * and save off the threshold and location values into mac.thermal_sensor_data
 **/
s32 ixgbe_init_thermal_sensor_thresh_generic(struct ixgbe_hw *hw)
{
        s32 status;
        u16 ets_offset;
        u16 ets_cfg;
        u16 ets_sensor;
        u8  low_thresh_delta;
        u8  num_sensors;
        u8  therm_limit;
        u8  i;
        struct ixgbe_thermal_sensor_data *data = &hw->mac.thermal_sensor_data;

        memset(data, 0, sizeof(struct ixgbe_thermal_sensor_data));

        /* Only support thermal sensors attached to physical port 0 */
        if ((IXGBE_READ_REG(hw, IXGBE_STATUS) & IXGBE_STATUS_LAN_ID_1))
                return IXGBE_NOT_IMPLEMENTED;

        status = ixgbe_get_ets_data(hw, &ets_cfg, &ets_offset);
        if (status)
                return status;

        low_thresh_delta = ((ets_cfg & IXGBE_ETS_LTHRES_DELTA_MASK) >>
                             IXGBE_ETS_LTHRES_DELTA_SHIFT);
        num_sensors = (ets_cfg & IXGBE_ETS_NUM_SENSORS_MASK);
        if (num_sensors > IXGBE_MAX_SENSORS)
                num_sensors = IXGBE_MAX_SENSORS;

        for (i = 0; i < num_sensors; i++) {
                u8  sensor_index;
                u8  sensor_location;

                if (hw->eeprom.ops.read(hw, ets_offset + 1 + i, &ets_sensor)) {
                        hw_err(hw, "eeprom read at offset %d failed\n",
                               ets_offset + 1 + i);
                        continue;
                }
                sensor_index = ((ets_sensor & IXGBE_ETS_DATA_INDEX_MASK) >>
                                IXGBE_ETS_DATA_INDEX_SHIFT);
                sensor_location = ((ets_sensor & IXGBE_ETS_DATA_LOC_MASK) >>
                                   IXGBE_ETS_DATA_LOC_SHIFT);
                therm_limit = ets_sensor & IXGBE_ETS_DATA_HTHRESH_MASK;

                hw->phy.ops.write_i2c_byte(hw,
                        ixgbe_emc_therm_limit[sensor_index],
                        IXGBE_I2C_THERMAL_SENSOR_ADDR, therm_limit);

                if (sensor_location == 0)
                        continue;

                data->sensor[i].location = sensor_location;
                data->sensor[i].caution_thresh = therm_limit;
                data->sensor[i].max_op_thresh = therm_limit - low_thresh_delta;
        }

        return 0;
}

void ixgbe_disable_rx_generic(struct ixgbe_hw *hw)
{
        u32 rxctrl;

        rxctrl = IXGBE_READ_REG(hw, IXGBE_RXCTRL);
        if (rxctrl & IXGBE_RXCTRL_RXEN) {
                if (hw->mac.type != ixgbe_mac_82598EB) {
                        u32 pfdtxgswc;

                        pfdtxgswc = IXGBE_READ_REG(hw, IXGBE_PFDTXGSWC);
                        if (pfdtxgswc & IXGBE_PFDTXGSWC_VT_LBEN) {
                                pfdtxgswc &= ~IXGBE_PFDTXGSWC_VT_LBEN;
                                IXGBE_WRITE_REG(hw, IXGBE_PFDTXGSWC, pfdtxgswc);
                                hw->mac.set_lben = true;
                        } else {
                                hw->mac.set_lben = false;
                        }
                }
                rxctrl &= ~IXGBE_RXCTRL_RXEN;
                IXGBE_WRITE_REG(hw, IXGBE_RXCTRL, rxctrl);
        }
}

void ixgbe_enable_rx_generic(struct ixgbe_hw *hw)
{
        u32 rxctrl;

        rxctrl = IXGBE_READ_REG(hw, IXGBE_RXCTRL);
        IXGBE_WRITE_REG(hw, IXGBE_RXCTRL, (rxctrl | IXGBE_RXCTRL_RXEN));

        if (hw->mac.type != ixgbe_mac_82598EB) {
                if (hw->mac.set_lben) {
                        u32 pfdtxgswc;

                        pfdtxgswc = IXGBE_READ_REG(hw, IXGBE_PFDTXGSWC);
                        pfdtxgswc |= IXGBE_PFDTXGSWC_VT_LBEN;
                        IXGBE_WRITE_REG(hw, IXGBE_PFDTXGSWC, pfdtxgswc);
                        hw->mac.set_lben = false;
                }
        }
}

/** ixgbe_mng_present - returns true when management capability is present
 * @hw: pointer to hardware structure
 **/
bool ixgbe_mng_present(struct ixgbe_hw *hw)
{
        u32 fwsm;

        if (hw->mac.type < ixgbe_mac_82599EB)
                return false;

        fwsm = IXGBE_READ_REG(hw, IXGBE_FWSM(hw));
        fwsm &= IXGBE_FWSM_MODE_MASK;
        return fwsm == IXGBE_FWSM_FW_MODE_PT;
}

/**
 *  ixgbe_setup_mac_link_multispeed_fiber - Set MAC link speed
 *  @hw: pointer to hardware structure
 *  @speed: new link speed
 *  @autoneg_wait_to_complete: true when waiting for completion is needed
 *
 *  Set the link speed in the MAC and/or PHY register and restarts link.
 */
s32 ixgbe_setup_mac_link_multispeed_fiber(struct ixgbe_hw *hw,
                                          ixgbe_link_speed speed,
                                          bool autoneg_wait_to_complete)
{
        ixgbe_link_speed link_speed = IXGBE_LINK_SPEED_UNKNOWN;
        ixgbe_link_speed highest_link_speed = IXGBE_LINK_SPEED_UNKNOWN;
        s32 status = 0;
        u32 speedcnt = 0;
        u32 i = 0;
        bool autoneg, link_up = false;

        /* Mask off requested but non-supported speeds */
        status = hw->mac.ops.get_link_capabilities(hw, &link_speed, &autoneg);
        if (status)
                return status;

        speed &= link_speed;

        /* Try each speed one by one, highest priority first.  We do this in
         * software because 10Gb fiber doesn't support speed autonegotiation.
         */
        if (speed & IXGBE_LINK_SPEED_10GB_FULL) {
                speedcnt++;
                highest_link_speed = IXGBE_LINK_SPEED_10GB_FULL;

                /* If we already have link at this speed, just jump out */
                status = hw->mac.ops.check_link(hw, &link_speed, &link_up,
                                                false);
                if (status)
                        return status;

                if (link_speed == IXGBE_LINK_SPEED_10GB_FULL && link_up)
                        goto out;

                /* Set the module link speed */
                switch (hw->phy.media_type) {
                case ixgbe_media_type_fiber:
                        hw->mac.ops.set_rate_select_speed(hw,
                                                    IXGBE_LINK_SPEED_10GB_FULL);
                        break;
                case ixgbe_media_type_fiber_qsfp:
                        /* QSFP module automatically detects MAC link speed */
                        break;
                default:
                        hw_dbg(hw, "Unexpected media type\n");
                        break;
                }

                /* Allow module to change analog characteristics (1G->10G) */
                msleep(40);

                status = hw->mac.ops.setup_mac_link(hw,
                                                    IXGBE_LINK_SPEED_10GB_FULL,
                                                    autoneg_wait_to_complete);
                if (status)
                        return status;

                /* Flap the Tx laser if it has not already been done */
                if (hw->mac.ops.flap_tx_laser)
                        hw->mac.ops.flap_tx_laser(hw);

                /* Wait for the controller to acquire link.  Per IEEE 802.3ap,
                 * Section 73.10.2, we may have to wait up to 500ms if KR is
                 * attempted.  82599 uses the same timing for 10g SFI.
                 */
                for (i = 0; i < 5; i++) {
                        /* Wait for the link partner to also set speed */
                        msleep(100);

                        /* If we have link, just jump out */
                        status = hw->mac.ops.check_link(hw, &link_speed,
                                                        &link_up, false);
                        if (status)
                                return status;

                        if (link_up)
                                goto out;
                }
        }

        if (speed & IXGBE_LINK_SPEED_1GB_FULL) {
                speedcnt++;
                if (highest_link_speed == IXGBE_LINK_SPEED_UNKNOWN)
                        highest_link_speed = IXGBE_LINK_SPEED_1GB_FULL;

                /* If we already have link at this speed, just jump out */
                status = hw->mac.ops.check_link(hw, &link_speed, &link_up,
                                                false);
                if (status)
                        return status;

                if (link_speed == IXGBE_LINK_SPEED_1GB_FULL && link_up)
                        goto out;

                /* Set the module link speed */
                switch (hw->phy.media_type) {
                case ixgbe_media_type_fiber:
                        hw->mac.ops.set_rate_select_speed(hw,
                                                     IXGBE_LINK_SPEED_1GB_FULL);
                        break;
                case ixgbe_media_type_fiber_qsfp:
                        /* QSFP module automatically detects link speed */
                        break;
                default:
                        hw_dbg(hw, "Unexpected media type\n");
                        break;
                }

                /* Allow module to change analog characteristics (10G->1G) */
                msleep(40);

                status = hw->mac.ops.setup_mac_link(hw,
                                                    IXGBE_LINK_SPEED_1GB_FULL,
                                                    autoneg_wait_to_complete);
                if (status)
                        return status;

                /* Flap the Tx laser if it has not already been done */
                if (hw->mac.ops.flap_tx_laser)
                        hw->mac.ops.flap_tx_laser(hw);

                /* Wait for the link partner to also set speed */
                msleep(100);

                /* If we have link, just jump out */
                status = hw->mac.ops.check_link(hw, &link_speed, &link_up,
                                                false);
                if (status)
                        return status;

                if (link_up)
                        goto out;
        }

        /* We didn't get link.  Configure back to the highest speed we tried,
         * (if there was more than one).  We call ourselves back with just the
         * single highest speed that the user requested.
         */
        if (speedcnt > 1)
                status = ixgbe_setup_mac_link_multispeed_fiber(hw,
                                                      highest_link_speed,
                                                      autoneg_wait_to_complete);

out:
        /* Set autoneg_advertised value based on input link speed */
        hw->phy.autoneg_advertised = 0;

        if (speed & IXGBE_LINK_SPEED_10GB_FULL)
                hw->phy.autoneg_advertised |= IXGBE_LINK_SPEED_10GB_FULL;

        if (speed & IXGBE_LINK_SPEED_1GB_FULL)
                hw->phy.autoneg_advertised |= IXGBE_LINK_SPEED_1GB_FULL;

        return status;
}

/**
 *  ixgbe_set_soft_rate_select_speed - Set module link speed
 *  @hw: pointer to hardware structure
 *  @speed: link speed to set
 *
 *  Set module link speed via the soft rate select.
 */
void ixgbe_set_soft_rate_select_speed(struct ixgbe_hw *hw,
                                      ixgbe_link_speed speed)
{
        s32 status;
        u8 rs, eeprom_data;

        switch (speed) {
        case IXGBE_LINK_SPEED_10GB_FULL:
                /* one bit mask same as setting on */
                rs = IXGBE_SFF_SOFT_RS_SELECT_10G;
                break;
        case IXGBE_LINK_SPEED_1GB_FULL:
                rs = IXGBE_SFF_SOFT_RS_SELECT_1G;
                break;
        default:
                hw_dbg(hw, "Invalid fixed module speed\n");
                return;
        }

        /* Set RS0 */
        status = hw->phy.ops.read_i2c_byte(hw, IXGBE_SFF_SFF_8472_OSCB,
                                           IXGBE_I2C_EEPROM_DEV_ADDR2,
                                           &eeprom_data);
        if (status) {
                hw_dbg(hw, "Failed to read Rx Rate Select RS0\n");
                return;
        }

        eeprom_data = (eeprom_data & ~IXGBE_SFF_SOFT_RS_SELECT_MASK) | rs;

        status = hw->phy.ops.write_i2c_byte(hw, IXGBE_SFF_SFF_8472_OSCB,
                                            IXGBE_I2C_EEPROM_DEV_ADDR2,
                                            eeprom_data);
        if (status) {
                hw_dbg(hw, "Failed to write Rx Rate Select RS0\n");
                return;
        }
}