// SPDX-License-Identifier: GPL-2.0
/* Intel PRO/1000 Linux driver
 * Copyright(c) 1999 - 2015 Intel Corporation.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms and conditions of the GNU General Public License,
 * version 2, as published by the Free Software Foundation.
 *
 * This program is distributed in the hope it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 * more details.
 *
 * The full GNU General Public License is included in this distribution in
 * the file called "COPYING".
 *
 * Contact Information:
 * Linux NICS <linux.nics@intel.com>
 * e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
 */

/* ethtool support for e1000 */

#include <linux/netdevice.h>
#include <linux/interrupt.h>
#include <linux/ethtool.h>
#include <linux/pci.h>
#include <linux/slab.h>
#include <linux/delay.h>
#include <linux/vmalloc.h>
#include <linux/pm_runtime.h>

#include "e1000.h"

enum { NETDEV_STATS, E1000_STATS };

struct e1000_stats {
        char stat_string[ETH_GSTRING_LEN];
        int type;
        int sizeof_stat;
        int stat_offset;
};

#define E1000_STAT(str, m) { \
                .stat_string = str, \
                .type = E1000_STATS, \
                .sizeof_stat = sizeof(((struct e1000_adapter *)0)->m), \
                .stat_offset = offsetof(struct e1000_adapter, m) }
#define E1000_NETDEV_STAT(str, m) { \
                .stat_string = str, \
                .type = NETDEV_STATS, \
                .sizeof_stat = sizeof(((struct rtnl_link_stats64 *)0)->m), \
                .stat_offset = offsetof(struct rtnl_link_stats64, m) }

static const struct e1000_stats e1000_gstrings_stats[] = {
        E1000_STAT("rx_packets", stats.gprc),
        E1000_STAT("tx_packets", stats.gptc),
        E1000_STAT("rx_bytes", stats.gorc),
        E1000_STAT("tx_bytes", stats.gotc),
        E1000_STAT("rx_broadcast", stats.bprc),
        E1000_STAT("tx_broadcast", stats.bptc),
        E1000_STAT("rx_multicast", stats.mprc),
        E1000_STAT("tx_multicast", stats.mptc),
        E1000_NETDEV_STAT("rx_errors", rx_errors),
        E1000_NETDEV_STAT("tx_errors", tx_errors),
        E1000_NETDEV_STAT("tx_dropped", tx_dropped),
        E1000_STAT("multicast", stats.mprc),
        E1000_STAT("collisions", stats.colc),
        E1000_NETDEV_STAT("rx_length_errors", rx_length_errors),
        E1000_NETDEV_STAT("rx_over_errors", rx_over_errors),
        E1000_STAT("rx_crc_errors", stats.crcerrs),
        E1000_NETDEV_STAT("rx_frame_errors", rx_frame_errors),
        E1000_STAT("rx_no_buffer_count", stats.rnbc),
        E1000_STAT("rx_missed_errors", stats.mpc),
        E1000_STAT("tx_aborted_errors", stats.ecol),
        E1000_STAT("tx_carrier_errors", stats.tncrs),
        E1000_NETDEV_STAT("tx_fifo_errors", tx_fifo_errors),
        E1000_NETDEV_STAT("tx_heartbeat_errors", tx_heartbeat_errors),
        E1000_STAT("tx_window_errors", stats.latecol),
        E1000_STAT("tx_abort_late_coll", stats.latecol),
        E1000_STAT("tx_deferred_ok", stats.dc),
        E1000_STAT("tx_single_coll_ok", stats.scc),
        E1000_STAT("tx_multi_coll_ok", stats.mcc),
        E1000_STAT("tx_timeout_count", tx_timeout_count),
        E1000_STAT("tx_restart_queue", restart_queue),
        E1000_STAT("rx_long_length_errors", stats.roc),
        E1000_STAT("rx_short_length_errors", stats.ruc),
        E1000_STAT("rx_align_errors", stats.algnerrc),
        E1000_STAT("tx_tcp_seg_good", stats.tsctc),
        E1000_STAT("tx_tcp_seg_failed", stats.tsctfc),
        E1000_STAT("rx_flow_control_xon", stats.xonrxc),
        E1000_STAT("rx_flow_control_xoff", stats.xoffrxc),
        E1000_STAT("tx_flow_control_xon", stats.xontxc),
        E1000_STAT("tx_flow_control_xoff", stats.xofftxc),
        E1000_STAT("rx_csum_offload_good", hw_csum_good),
        E1000_STAT("rx_csum_offload_errors", hw_csum_err),
        E1000_STAT("rx_header_split", rx_hdr_split),
        E1000_STAT("alloc_rx_buff_failed", alloc_rx_buff_failed),
        E1000_STAT("tx_smbus", stats.mgptc),
        E1000_STAT("rx_smbus", stats.mgprc),
        E1000_STAT("dropped_smbus", stats.mgpdc),
        E1000_STAT("rx_dma_failed", rx_dma_failed),
        E1000_STAT("tx_dma_failed", tx_dma_failed),
        E1000_STAT("rx_hwtstamp_cleared", rx_hwtstamp_cleared),
        E1000_STAT("uncorr_ecc_errors", uncorr_errors),
        E1000_STAT("corr_ecc_errors", corr_errors),
        E1000_STAT("tx_hwtstamp_timeouts", tx_hwtstamp_timeouts),
        E1000_STAT("tx_hwtstamp_skipped", tx_hwtstamp_skipped),
};

#define E1000_GLOBAL_STATS_LEN  ARRAY_SIZE(e1000_gstrings_stats)
#define E1000_STATS_LEN (E1000_GLOBAL_STATS_LEN)
static const char e1000_gstrings_test[][ETH_GSTRING_LEN] = {
        "Register test  (offline)", "Eeprom test    (offline)",
        "Interrupt test (offline)", "Loopback test  (offline)",
        "Link test   (on/offline)"
};

#define E1000_TEST_LEN ARRAY_SIZE(e1000_gstrings_test)

static int e1000_get_link_ksettings(struct net_device *netdev,
                                    struct ethtool_link_ksettings *cmd)
{
        struct e1000_adapter *adapter = netdev_priv(netdev);
        struct e1000_hw *hw = &adapter->hw;
        u32 speed, supported, advertising;

        if (hw->phy.media_type == e1000_media_type_copper) {
                supported = (SUPPORTED_10baseT_Half |
                             SUPPORTED_10baseT_Full |
                             SUPPORTED_100baseT_Half |
                             SUPPORTED_100baseT_Full |
                             SUPPORTED_1000baseT_Full |
                             SUPPORTED_Autoneg |
                             SUPPORTED_TP);
                if (hw->phy.type == e1000_phy_ife)
                        supported &= ~SUPPORTED_1000baseT_Full;
                advertising = ADVERTISED_TP;

                if (hw->mac.autoneg == 1) {
                        advertising |= ADVERTISED_Autoneg;
                        /* the e1000 autoneg seems to match ethtool nicely */
                        advertising |= hw->phy.autoneg_advertised;
                }

                cmd->base.port = PORT_TP;
                cmd->base.phy_address = hw->phy.addr;
        } else {
                supported   = (SUPPORTED_1000baseT_Full |
                               SUPPORTED_FIBRE |
                               SUPPORTED_Autoneg);

                advertising = (ADVERTISED_1000baseT_Full |
                               ADVERTISED_FIBRE |
                               ADVERTISED_Autoneg);

                cmd->base.port = PORT_FIBRE;
        }

        speed = SPEED_UNKNOWN;
        cmd->base.duplex = DUPLEX_UNKNOWN;

        if (netif_running(netdev)) {
                if (netif_carrier_ok(netdev)) {
                        speed = adapter->link_speed;
                        cmd->base.duplex = adapter->link_duplex - 1;
                }
        } else if (!pm_runtime_suspended(netdev->dev.parent)) {
                u32 status = er32(STATUS);

                if (status & E1000_STATUS_LU) {
                        if (status & E1000_STATUS_SPEED_1000)
                                speed = SPEED_1000;
                        else if (status & E1000_STATUS_SPEED_100)
                                speed = SPEED_100;
                        else
                                speed = SPEED_10;

                        if (status & E1000_STATUS_FD)
                                cmd->base.duplex = DUPLEX_FULL;
                        else
                                cmd->base.duplex = DUPLEX_HALF;
                }
        }

        cmd->base.speed = speed;
        cmd->base.autoneg = ((hw->phy.media_type == e1000_media_type_fiber) ||
                         hw->mac.autoneg) ? AUTONEG_ENABLE : AUTONEG_DISABLE;

        /* MDI-X => 2; MDI =>1; Invalid =>0 */
        if ((hw->phy.media_type == e1000_media_type_copper) &&
            netif_carrier_ok(netdev))
                cmd->base.eth_tp_mdix = hw->phy.is_mdix ?
                        ETH_TP_MDI_X : ETH_TP_MDI;
        else
                cmd->base.eth_tp_mdix = ETH_TP_MDI_INVALID;

        if (hw->phy.mdix == AUTO_ALL_MODES)
                cmd->base.eth_tp_mdix_ctrl = ETH_TP_MDI_AUTO;
        else
                cmd->base.eth_tp_mdix_ctrl = hw->phy.mdix;

        if (hw->phy.media_type != e1000_media_type_copper)
                cmd->base.eth_tp_mdix_ctrl = ETH_TP_MDI_INVALID;

        ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported,
                                                supported);
        ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising,
                                                advertising);

        return 0;
}

static int e1000_set_spd_dplx(struct e1000_adapter *adapter, u32 spd, u8 dplx)
{
        struct e1000_mac_info *mac = &adapter->hw.mac;

        mac->autoneg = 0;

        /* Make sure dplx is at most 1 bit and lsb of speed is not set
         * for the switch() below to work
         */
        if ((spd & 1) || (dplx & ~1))
                goto err_inval;

        /* Fiber NICs only allow 1000 gbps Full duplex */
        if ((adapter->hw.phy.media_type == e1000_media_type_fiber) &&
            (spd != SPEED_1000) && (dplx != DUPLEX_FULL)) {
                goto err_inval;
        }

        switch (spd + dplx) {
        case SPEED_10 + DUPLEX_HALF:
                mac->forced_speed_duplex = ADVERTISE_10_HALF;
                break;
        case SPEED_10 + DUPLEX_FULL:
                mac->forced_speed_duplex = ADVERTISE_10_FULL;
                break;
        case SPEED_100 + DUPLEX_HALF:
                mac->forced_speed_duplex = ADVERTISE_100_HALF;
                break;
        case SPEED_100 + DUPLEX_FULL:
                mac->forced_speed_duplex = ADVERTISE_100_FULL;
                break;
        case SPEED_1000 + DUPLEX_FULL:
                if (adapter->hw.phy.media_type == e1000_media_type_copper) {
                        mac->autoneg = 1;
                        adapter->hw.phy.autoneg_advertised =
                                ADVERTISE_1000_FULL;
                } else {
                        mac->forced_speed_duplex = ADVERTISE_1000_FULL;
                }
                break;
        case SPEED_1000 + DUPLEX_HALF:  /* not supported */
        default:
                goto err_inval;
        }

        /* clear MDI, MDI(-X) override is only allowed when autoneg enabled */
        adapter->hw.phy.mdix = AUTO_ALL_MODES;

        return 0;

err_inval:
        e_err("Unsupported Speed/Duplex configuration\n");
        return -EINVAL;
}

static int e1000_set_link_ksettings(struct net_device *netdev,
                                    const struct ethtool_link_ksettings *cmd)
{
        struct e1000_adapter *adapter = netdev_priv(netdev);
        struct e1000_hw *hw = &adapter->hw;
        int ret_val = 0;
        u32 advertising;

        ethtool_convert_link_mode_to_legacy_u32(&advertising,
                                                cmd->link_modes.advertising);

        pm_runtime_get_sync(netdev->dev.parent);

        /* When SoL/IDER sessions are active, autoneg/speed/duplex
         * cannot be changed
         */
        if (hw->phy.ops.check_reset_block &&
            hw->phy.ops.check_reset_block(hw)) {
                e_err("Cannot change link characteristics when SoL/IDER is active.\n");
                ret_val = -EINVAL;
                goto out;
        }

        /* MDI setting is only allowed when autoneg enabled because
         * some hardware doesn't allow MDI setting when speed or
         * duplex is forced.
         */
        if (cmd->base.eth_tp_mdix_ctrl) {
                if (hw->phy.media_type != e1000_media_type_copper) {
                        ret_val = -EOPNOTSUPP;
                        goto out;
                }

                if ((cmd->base.eth_tp_mdix_ctrl != ETH_TP_MDI_AUTO) &&
                    (cmd->base.autoneg != AUTONEG_ENABLE)) {
                        e_err("forcing MDI/MDI-X state is not supported when link speed and/or duplex are forced\n");
                        ret_val = -EINVAL;
                        goto out;
                }
        }

        while (test_and_set_bit(__E1000_RESETTING, &adapter->state))
                usleep_range(1000, 2000);

        if (cmd->base.autoneg == AUTONEG_ENABLE) {
                hw->mac.autoneg = 1;
                if (hw->phy.media_type == e1000_media_type_fiber)
                        hw->phy.autoneg_advertised = ADVERTISED_1000baseT_Full |
                            ADVERTISED_FIBRE | ADVERTISED_Autoneg;
                else
                        hw->phy.autoneg_advertised = advertising |
                            ADVERTISED_TP | ADVERTISED_Autoneg;
                advertising = hw->phy.autoneg_advertised;
                if (adapter->fc_autoneg)
                        hw->fc.requested_mode = e1000_fc_default;
        } else {
                u32 speed = cmd->base.speed;
                /* calling this overrides forced MDI setting */
                if (e1000_set_spd_dplx(adapter, speed, cmd->base.duplex)) {
                        ret_val = -EINVAL;
                        goto out;
                }
        }

        /* MDI-X => 2; MDI => 1; Auto => 3 */
        if (cmd->base.eth_tp_mdix_ctrl) {
                /* fix up the value for auto (3 => 0) as zero is mapped
                 * internally to auto
                 */
                if (cmd->base.eth_tp_mdix_ctrl == ETH_TP_MDI_AUTO)
                        hw->phy.mdix = AUTO_ALL_MODES;
                else
                        hw->phy.mdix = cmd->base.eth_tp_mdix_ctrl;
        }

        /* reset the link */
        if (netif_running(adapter->netdev)) {
                e1000e_down(adapter, true);
                e1000e_up(adapter);
        } else {
                e1000e_reset(adapter);
        }

out:
        pm_runtime_put_sync(netdev->dev.parent);
        clear_bit(__E1000_RESETTING, &adapter->state);
        return ret_val;
}

static void e1000_get_pauseparam(struct net_device *netdev,
                                 struct ethtool_pauseparam *pause)
{
        struct e1000_adapter *adapter = netdev_priv(netdev);
        struct e1000_hw *hw = &adapter->hw;

        pause->autoneg =
            (adapter->fc_autoneg ? AUTONEG_ENABLE : AUTONEG_DISABLE);

        if (hw->fc.current_mode == e1000_fc_rx_pause) {
                pause->rx_pause = 1;
        } else if (hw->fc.current_mode == e1000_fc_tx_pause) {
                pause->tx_pause = 1;
        } else if (hw->fc.current_mode == e1000_fc_full) {
                pause->rx_pause = 1;
                pause->tx_pause = 1;
        }
}

static int e1000_set_pauseparam(struct net_device *netdev,
                                struct ethtool_pauseparam *pause)
{
        struct e1000_adapter *adapter = netdev_priv(netdev);
        struct e1000_hw *hw = &adapter->hw;
        int retval = 0;

        adapter->fc_autoneg = pause->autoneg;

        while (test_and_set_bit(__E1000_RESETTING, &adapter->state))
                usleep_range(1000, 2000);

        pm_runtime_get_sync(netdev->dev.parent);

        if (adapter->fc_autoneg == AUTONEG_ENABLE) {
                hw->fc.requested_mode = e1000_fc_default;
                if (netif_running(adapter->netdev)) {
                        e1000e_down(adapter, true);
                        e1000e_up(adapter);
                } else {
                        e1000e_reset(adapter);
                }
        } else {
                if (pause->rx_pause && pause->tx_pause)
                        hw->fc.requested_mode = e1000_fc_full;
                else if (pause->rx_pause && !pause->tx_pause)
                        hw->fc.requested_mode = e1000_fc_rx_pause;
                else if (!pause->rx_pause && pause->tx_pause)
                        hw->fc.requested_mode = e1000_fc_tx_pause;
                else if (!pause->rx_pause && !pause->tx_pause)
                        hw->fc.requested_mode = e1000_fc_none;

                hw->fc.current_mode = hw->fc.requested_mode;

                if (hw->phy.media_type == e1000_media_type_fiber) {
                        retval = hw->mac.ops.setup_link(hw);
                        /* implicit goto out */
                } else {
                        retval = e1000e_force_mac_fc(hw);
                        if (retval)
                                goto out;
                        e1000e_set_fc_watermarks(hw);
                }
        }

out:
        pm_runtime_put_sync(netdev->dev.parent);
        clear_bit(__E1000_RESETTING, &adapter->state);
        return retval;
}

static u32 e1000_get_msglevel(struct net_device *netdev)
{
        struct e1000_adapter *adapter = netdev_priv(netdev);
        return adapter->msg_enable;
}

static void e1000_set_msglevel(struct net_device *netdev, u32 data)
{
        struct e1000_adapter *adapter = netdev_priv(netdev);
        adapter->msg_enable = data;
}

static int e1000_get_regs_len(struct net_device __always_unused *netdev)
{
#define E1000_REGS_LEN 32       /* overestimate */
        return E1000_REGS_LEN * sizeof(u32);
}

static void e1000_get_regs(struct net_device *netdev,
                           struct ethtool_regs *regs, void *p)
{
        struct e1000_adapter *adapter = netdev_priv(netdev);
        struct e1000_hw *hw = &adapter->hw;
        u32 *regs_buff = p;
        u16 phy_data;

        pm_runtime_get_sync(netdev->dev.parent);

        memset(p, 0, E1000_REGS_LEN * sizeof(u32));

        regs->version = (1u << 24) |
                        (adapter->pdev->revision << 16) |
                        adapter->pdev->device;

        regs_buff[0] = er32(CTRL);
        regs_buff[1] = er32(STATUS);

        regs_buff[2] = er32(RCTL);
        regs_buff[3] = er32(RDLEN(0));
        regs_buff[4] = er32(RDH(0));
        regs_buff[5] = er32(RDT(0));
        regs_buff[6] = er32(RDTR);

        regs_buff[7] = er32(TCTL);
        regs_buff[8] = er32(TDLEN(0));
        regs_buff[9] = er32(TDH(0));
        regs_buff[10] = er32(TDT(0));
        regs_buff[11] = er32(TIDV);

        regs_buff[12] = adapter->hw.phy.type;   /* PHY type (IGP=1, M88=0) */

        /* ethtool doesn't use anything past this point, so all this
         * code is likely legacy junk for apps that may or may not exist
         */
        if (hw->phy.type == e1000_phy_m88) {
                e1e_rphy(hw, M88E1000_PHY_SPEC_STATUS, &phy_data);
                regs_buff[13] = (u32)phy_data; /* cable length */
                regs_buff[14] = 0;  /* Dummy (to align w/ IGP phy reg dump) */
                regs_buff[15] = 0;  /* Dummy (to align w/ IGP phy reg dump) */
                regs_buff[16] = 0;  /* Dummy (to align w/ IGP phy reg dump) */
                e1e_rphy(hw, M88E1000_PHY_SPEC_CTRL, &phy_data);
                regs_buff[17] = (u32)phy_data; /* extended 10bt distance */
                regs_buff[18] = regs_buff[13]; /* cable polarity */
                regs_buff[19] = 0;  /* Dummy (to align w/ IGP phy reg dump) */
                regs_buff[20] = regs_buff[17]; /* polarity correction */
                /* phy receive errors */
                regs_buff[22] = adapter->phy_stats.receive_errors;
                regs_buff[23] = regs_buff[13]; /* mdix mode */
        }
        regs_buff[21] = 0;      /* was idle_errors */
        e1e_rphy(hw, MII_STAT1000, &phy_data);
        regs_buff[24] = (u32)phy_data;  /* phy local receiver status */
        regs_buff[25] = regs_buff[24];  /* phy remote receiver status */

        pm_runtime_put_sync(netdev->dev.parent);
}

static int e1000_get_eeprom_len(struct net_device *netdev)
{
        struct e1000_adapter *adapter = netdev_priv(netdev);
        return adapter->hw.nvm.word_size * 2;
}

static int e1000_get_eeprom(struct net_device *netdev,
                            struct ethtool_eeprom *eeprom, u8 *bytes)
{
        struct e1000_adapter *adapter = netdev_priv(netdev);
        struct e1000_hw *hw = &adapter->hw;
        u16 *eeprom_buff;
        int first_word;
        int last_word;
        int ret_val = 0;
        u16 i;

        if (eeprom->len == 0)
                return -EINVAL;

        eeprom->magic = adapter->pdev->vendor | (adapter->pdev->device << 16);

        first_word = eeprom->offset >> 1;
        last_word = (eeprom->offset + eeprom->len - 1) >> 1;

        eeprom_buff = kmalloc(sizeof(u16) * (last_word - first_word + 1),
                              GFP_KERNEL);
        if (!eeprom_buff)
                return -ENOMEM;

        pm_runtime_get_sync(netdev->dev.parent);

        if (hw->nvm.type == e1000_nvm_eeprom_spi) {
                ret_val = e1000_read_nvm(hw, first_word,
                                         last_word - first_word + 1,
                                         eeprom_buff);
        } else {
                for (i = 0; i < last_word - first_word + 1; i++) {
                        ret_val = e1000_read_nvm(hw, first_word + i, 1,
                                                 &eeprom_buff[i]);
                        if (ret_val)
                                break;
                }
        }

        pm_runtime_put_sync(netdev->dev.parent);

        if (ret_val) {
                /* a read error occurred, throw away the result */
                memset(eeprom_buff, 0xff, sizeof(u16) *
                       (last_word - first_word + 1));
        } else {
                /* Device's eeprom is always little-endian, word addressable */
                for (i = 0; i < last_word - first_word + 1; i++)
                        le16_to_cpus(&eeprom_buff[i]);
        }

        memcpy(bytes, (u8 *)eeprom_buff + (eeprom->offset & 1), eeprom->len);
        kfree(eeprom_buff);

        return ret_val;
}

static int e1000_set_eeprom(struct net_device *netdev,
                            struct ethtool_eeprom *eeprom, u8 *bytes)
{
        struct e1000_adapter *adapter = netdev_priv(netdev);
        struct e1000_hw *hw = &adapter->hw;
        u16 *eeprom_buff;
        void *ptr;
        int max_len;
        int first_word;
        int last_word;
        int ret_val = 0;
        u16 i;

        if (eeprom->len == 0)
                return -EOPNOTSUPP;

        if (eeprom->magic !=
            (adapter->pdev->vendor | (adapter->pdev->device << 16)))
                return -EFAULT;

        if (adapter->flags & FLAG_READ_ONLY_NVM)
                return -EINVAL;

        max_len = hw->nvm.word_size * 2;

        first_word = eeprom->offset >> 1;
        last_word = (eeprom->offset + eeprom->len - 1) >> 1;
        eeprom_buff = kmalloc(max_len, GFP_KERNEL);
        if (!eeprom_buff)
                return -ENOMEM;

        ptr = (void *)eeprom_buff;

        pm_runtime_get_sync(netdev->dev.parent);

        if (eeprom->offset & 1) {
                /* need read/modify/write of first changed EEPROM word */
                /* only the second byte of the word is being modified */
                ret_val = e1000_read_nvm(hw, first_word, 1, &eeprom_buff[0]);
                ptr++;
        }
        if (((eeprom->offset + eeprom->len) & 1) && (!ret_val))
                /* need read/modify/write of last changed EEPROM word */
                /* only the first byte of the word is being modified */
                ret_val = e1000_read_nvm(hw, last_word, 1,
                                         &eeprom_buff[last_word - first_word]);

        if (ret_val)
                goto out;

        /* Device's eeprom is always little-endian, word addressable */
        for (i = 0; i < last_word - first_word + 1; i++)
                le16_to_cpus(&eeprom_buff[i]);

        memcpy(ptr, bytes, eeprom->len);

        for (i = 0; i < last_word - first_word + 1; i++)
                cpu_to_le16s(&eeprom_buff[i]);

        ret_val = e1000_write_nvm(hw, first_word,
                                  last_word - first_word + 1, eeprom_buff);

        if (ret_val)
                goto out;

        /* Update the checksum over the first part of the EEPROM if needed
         * and flush shadow RAM for applicable controllers
         */
        if ((first_word <= NVM_CHECKSUM_REG) ||
            (hw->mac.type == e1000_82583) ||
            (hw->mac.type == e1000_82574) ||
            (hw->mac.type == e1000_82573))
                ret_val = e1000e_update_nvm_checksum(hw);

out:
        pm_runtime_put_sync(netdev->dev.parent);
        kfree(eeprom_buff);
        return ret_val;
}

static void e1000_get_drvinfo(struct net_device *netdev,
                              struct ethtool_drvinfo *drvinfo)
{
        struct e1000_adapter *adapter = netdev_priv(netdev);

        strlcpy(drvinfo->driver, e1000e_driver_name, sizeof(drvinfo->driver));
        strlcpy(drvinfo->version, e1000e_driver_version,
                sizeof(drvinfo->version));

        /* EEPROM image version # is reported as firmware version # for
         * PCI-E controllers
         */
        snprintf(drvinfo->fw_version, sizeof(drvinfo->fw_version),
                 "%d.%d-%d",
                 (adapter->eeprom_vers & 0xF000) >> 12,
                 (adapter->eeprom_vers & 0x0FF0) >> 4,
                 (adapter->eeprom_vers & 0x000F));

        strlcpy(drvinfo->bus_info, pci_name(adapter->pdev),
                sizeof(drvinfo->bus_info));
}

static void e1000_get_ringparam(struct net_device *netdev,
                                struct ethtool_ringparam *ring)
{
        struct e1000_adapter *adapter = netdev_priv(netdev);

        ring->rx_max_pending = E1000_MAX_RXD;
        ring->tx_max_pending = E1000_MAX_TXD;
        ring->rx_pending = adapter->rx_ring_count;
        ring->tx_pending = adapter->tx_ring_count;
}

static int e1000_set_ringparam(struct net_device *netdev,
                               struct ethtool_ringparam *ring)
{
        struct e1000_adapter *adapter = netdev_priv(netdev);
        struct e1000_ring *temp_tx = NULL, *temp_rx = NULL;
        int err = 0, size = sizeof(struct e1000_ring);
        bool set_tx = false, set_rx = false;
        u16 new_rx_count, new_tx_count;

        if ((ring->rx_mini_pending) || (ring->rx_jumbo_pending))
                return -EINVAL;

        new_rx_count = clamp_t(u32, ring->rx_pending, E1000_MIN_RXD,
                               E1000_MAX_RXD);
        new_rx_count = ALIGN(new_rx_count, REQ_RX_DESCRIPTOR_MULTIPLE);

        new_tx_count = clamp_t(u32, ring->tx_pending, E1000_MIN_TXD,
                               E1000_MAX_TXD);
        new_tx_count = ALIGN(new_tx_count, REQ_TX_DESCRIPTOR_MULTIPLE);

        if ((new_tx_count == adapter->tx_ring_count) &&
            (new_rx_count == adapter->rx_ring_count))
                /* nothing to do */
                return 0;

        while (test_and_set_bit(__E1000_RESETTING, &adapter->state))
                usleep_range(1000, 2000);

        if (!netif_running(adapter->netdev)) {
                /* Set counts now and allocate resources during open() */
                adapter->tx_ring->count = new_tx_count;
                adapter->rx_ring->count = new_rx_count;
                adapter->tx_ring_count = new_tx_count;
                adapter->rx_ring_count = new_rx_count;
                goto clear_reset;
        }

        set_tx = (new_tx_count != adapter->tx_ring_count);
        set_rx = (new_rx_count != adapter->rx_ring_count);

        /* Allocate temporary storage for ring updates */
        if (set_tx) {
                temp_tx = vmalloc(size);
                if (!temp_tx) {
                        err = -ENOMEM;
                        goto free_temp;
                }
        }
        if (set_rx) {
                temp_rx = vmalloc(size);
                if (!temp_rx) {
                        err = -ENOMEM;
                        goto free_temp;
                }
        }

        pm_runtime_get_sync(netdev->dev.parent);

        e1000e_down(adapter, true);

        /* We can't just free everything and then setup again, because the
         * ISRs in MSI-X mode get passed pointers to the Tx and Rx ring
         * structs.  First, attempt to allocate new resources...
         */
        if (set_tx) {
                memcpy(temp_tx, adapter->tx_ring, size);
                temp_tx->count = new_tx_count;
                err = e1000e_setup_tx_resources(temp_tx);
                if (err)
                        goto err_setup;
        }
        if (set_rx) {
                memcpy(temp_rx, adapter->rx_ring, size);
                temp_rx->count = new_rx_count;
                err = e1000e_setup_rx_resources(temp_rx);
                if (err)
                        goto err_setup_rx;
        }

        /* ...then free the old resources and copy back any new ring data */
        if (set_tx) {
                e1000e_free_tx_resources(adapter->tx_ring);
                memcpy(adapter->tx_ring, temp_tx, size);
                adapter->tx_ring_count = new_tx_count;
        }
        if (set_rx) {
                e1000e_free_rx_resources(adapter->rx_ring);
                memcpy(adapter->rx_ring, temp_rx, size);
                adapter->rx_ring_count = new_rx_count;
        }

err_setup_rx:
        if (err && set_tx)
                e1000e_free_tx_resources(temp_tx);
err_setup:
        e1000e_up(adapter);
        pm_runtime_put_sync(netdev->dev.parent);
free_temp:
        vfree(temp_tx);
        vfree(temp_rx);
clear_reset:
        clear_bit(__E1000_RESETTING, &adapter->state);
        return err;
}

static bool reg_pattern_test(struct e1000_adapter *adapter, u64 *data,
                             int reg, int offset, u32 mask, u32 write)
{
        u32 pat, val;
        static const u32 test[] = {
                0x5A5A5A5A, 0xA5A5A5A5, 0x00000000, 0xFFFFFFFF
        };
        for (pat = 0; pat < ARRAY_SIZE(test); pat++) {
                E1000_WRITE_REG_ARRAY(&adapter->hw, reg, offset,
                                      (test[pat] & write));
                val = E1000_READ_REG_ARRAY(&adapter->hw, reg, offset);
                if (val != (test[pat] & write & mask)) {
                        e_err("pattern test failed (reg 0x%05X): got 0x%08X expected 0x%08X\n",
                              reg + (offset << 2), val,
                              (test[pat] & write & mask));
                        *data = reg;
                        return true;
                }
        }
        return false;
}

static bool reg_set_and_check(struct e1000_adapter *adapter, u64 *data,
                              int reg, u32 mask, u32 write)
{
        u32 val;

        __ew32(&adapter->hw, reg, write & mask);
        val = __er32(&adapter->hw, reg);
        if ((write & mask) != (val & mask)) {
                e_err("set/check test failed (reg 0x%05X): got 0x%08X expected 0x%08X\n",
                      reg, (val & mask), (write & mask));
                *data = reg;
                return true;
        }
        return false;
}

#define REG_PATTERN_TEST_ARRAY(reg, offset, mask, write)                       \
        do {                                                                   \
                if (reg_pattern_test(adapter, data, reg, offset, mask, write)) \
                        return 1;                                              \
        } while (0)
#define REG_PATTERN_TEST(reg, mask, write)                                     \
        REG_PATTERN_TEST_ARRAY(reg, 0, mask, write)

#define REG_SET_AND_CHECK(reg, mask, write)                                    \
        do {                                                                   \
                if (reg_set_and_check(adapter, data, reg, mask, write))        \
                        return 1;                                              \
        } while (0)

static int e1000_reg_test(struct e1000_adapter *adapter, u64 *data)
{
        struct e1000_hw *hw = &adapter->hw;
        struct e1000_mac_info *mac = &adapter->hw.mac;
        u32 value;
        u32 before;
        u32 after;
        u32 i;
        u32 toggle;
        u32 mask;
        u32 wlock_mac = 0;

        /* The status register is Read Only, so a write should fail.
         * Some bits that get toggled are ignored.  There are several bits
         * on newer hardware that are r/w.
         */
        switch (mac->type) {
        case e1000_82571:
        case e1000_82572:
        case e1000_80003es2lan:
                toggle = 0x7FFFF3FF;
                break;
        default:
                toggle = 0x7FFFF033;
                break;
        }

        before = er32(STATUS);
        value = (er32(STATUS) & toggle);
        ew32(STATUS, toggle);
        after = er32(STATUS) & toggle;
        if (value != after) {
                e_err("failed STATUS register test got: 0x%08X expected: 0x%08X\n",
                      after, value);
                *data = 1;
                return 1;
        }
        /* restore previous status */
        ew32(STATUS, before);

        if (!(adapter->flags & FLAG_IS_ICH)) {
                REG_PATTERN_TEST(E1000_FCAL, 0xFFFFFFFF, 0xFFFFFFFF);
                REG_PATTERN_TEST(E1000_FCAH, 0x0000FFFF, 0xFFFFFFFF);
                REG_PATTERN_TEST(E1000_FCT, 0x0000FFFF, 0xFFFFFFFF);
                REG_PATTERN_TEST(E1000_VET, 0x0000FFFF, 0xFFFFFFFF);
        }

        REG_PATTERN_TEST(E1000_RDTR, 0x0000FFFF, 0xFFFFFFFF);
        REG_PATTERN_TEST(E1000_RDBAH(0), 0xFFFFFFFF, 0xFFFFFFFF);
        REG_PATTERN_TEST(E1000_RDLEN(0), 0x000FFF80, 0x000FFFFF);
        REG_PATTERN_TEST(E1000_RDH(0), 0x0000FFFF, 0x0000FFFF);
        REG_PATTERN_TEST(E1000_RDT(0), 0x0000FFFF, 0x0000FFFF);
        REG_PATTERN_TEST(E1000_FCRTH, 0x0000FFF8, 0x0000FFF8);
        REG_PATTERN_TEST(E1000_FCTTV, 0x0000FFFF, 0x0000FFFF);
        REG_PATTERN_TEST(E1000_TIPG, 0x3FFFFFFF, 0x3FFFFFFF);
        REG_PATTERN_TEST(E1000_TDBAH(0), 0xFFFFFFFF, 0xFFFFFFFF);
        REG_PATTERN_TEST(E1000_TDLEN(0), 0x000FFF80, 0x000FFFFF);

        REG_SET_AND_CHECK(E1000_RCTL, 0xFFFFFFFF, 0x00000000);

        before = ((adapter->flags & FLAG_IS_ICH) ? 0x06C3B33E : 0x06DFB3FE);
        REG_SET_AND_CHECK(E1000_RCTL, before, 0x003FFFFB);
        REG_SET_AND_CHECK(E1000_TCTL, 0xFFFFFFFF, 0x00000000);

        REG_SET_AND_CHECK(E1000_RCTL, before, 0xFFFFFFFF);
        REG_PATTERN_TEST(E1000_RDBAL(0), 0xFFFFFFF0, 0xFFFFFFFF);
        if (!(adapter->flags & FLAG_IS_ICH))
                REG_PATTERN_TEST(E1000_TXCW, 0xC000FFFF, 0x0000FFFF);
        REG_PATTERN_TEST(E1000_TDBAL(0), 0xFFFFFFF0, 0xFFFFFFFF);
        REG_PATTERN_TEST(E1000_TIDV, 0x0000FFFF, 0x0000FFFF);
        mask = 0x8003FFFF;
        switch (mac->type) {
        case e1000_ich10lan:
        case e1000_pchlan:
        case e1000_pch2lan:
        case e1000_pch_lpt:
        case e1000_pch_spt:
                /* fall through */
        case e1000_pch_cnp:
                mask |= BIT(18);
                break;
        default:
                break;
        }

        if (mac->type >= e1000_pch_lpt)
                wlock_mac = (er32(FWSM) & E1000_FWSM_WLOCK_MAC_MASK) >>
                    E1000_FWSM_WLOCK_MAC_SHIFT;

        for (i = 0; i < mac->rar_entry_count; i++) {
                if (mac->type >= e1000_pch_lpt) {
                        /* Cannot test write-protected SHRAL[n] registers */
                        if ((wlock_mac == 1) || (wlock_mac && (i > wlock_mac)))
                                continue;

                        /* SHRAH[9] different than the others */
                        if (i == 10)
                                mask |= BIT(30);
                        else
                                mask &= ~BIT(30);
                }
                if (mac->type == e1000_pch2lan) {
                        /* SHRAH[0,1,2] different than previous */
                        if (i == 1)
                                mask &= 0xFFF4FFFF;
                        /* SHRAH[3] different than SHRAH[0,1,2] */
                        if (i == 4)
                                mask |= BIT(30);
                        /* RAR[1-6] owned by management engine - skipping */
                        if (i > 0)
                                i += 6;
                }

                REG_PATTERN_TEST_ARRAY(E1000_RA, ((i << 1) + 1), mask,
                                       0xFFFFFFFF);
                /* reset index to actual value */
                if ((mac->type == e1000_pch2lan) && (i > 6))
                        i -= 6;
        }

        for (i = 0; i < mac->mta_reg_count; i++)
                REG_PATTERN_TEST_ARRAY(E1000_MTA, i, 0xFFFFFFFF, 0xFFFFFFFF);

        *data = 0;

        return 0;
}

static int e1000_eeprom_test(struct e1000_adapter *adapter, u64 *data)
{
        u16 temp;
        u16 checksum = 0;
        u16 i;

        *data = 0;
        /* Read and add up the contents of the EEPROM */
        for (i = 0; i < (NVM_CHECKSUM_REG + 1); i++) {
                if ((e1000_read_nvm(&adapter->hw, i, 1, &temp)) < 0) {
                        *data = 1;
                        return *data;
                }
                checksum += temp;
        }

        /* If Checksum is not Correct return error else test passed */
        if ((checksum != (u16)NVM_SUM) && !(*data))
                *data = 2;

        return *data;
}

static irqreturn_t e1000_test_intr(int __always_unused irq, void *data)
{
        struct net_device *netdev = (struct net_device *)data;
        struct e1000_adapter *adapter = netdev_priv(netdev);
        struct e1000_hw *hw = &adapter->hw;

        adapter->test_icr |= er32(ICR);

        return IRQ_HANDLED;
}

static int e1000_intr_test(struct e1000_adapter *adapter, u64 *data)
{
        struct net_device *netdev = adapter->netdev;
        struct e1000_hw *hw = &adapter->hw;
        u32 mask;
        u32 shared_int = 1;
        u32 irq = adapter->pdev->irq;
        int i;
        int ret_val = 0;
        int int_mode = E1000E_INT_MODE_LEGACY;

        *data = 0;

        /* NOTE: we don't test MSI/MSI-X interrupts here, yet */
        if (adapter->int_mode == E1000E_INT_MODE_MSIX) {
                int_mode = adapter->int_mode;
                e1000e_reset_interrupt_capability(adapter);
                adapter->int_mode = E1000E_INT_MODE_LEGACY;
                e1000e_set_interrupt_capability(adapter);
        }
        /* Hook up test interrupt handler just for this test */
        if (!request_irq(irq, e1000_test_intr, IRQF_PROBE_SHARED, netdev->name,
                         netdev)) {
                shared_int = 0;
        } else if (request_irq(irq, e1000_test_intr, IRQF_SHARED, netdev->name,
                               netdev)) {
                *data = 1;
                ret_val = -1;
                goto out;
        }
        e_info("testing %s interrupt\n", (shared_int ? "shared" : "unshared"));

        /* Disable all the interrupts */
        ew32(IMC, 0xFFFFFFFF);
        e1e_flush();
        usleep_range(10000, 20000);

        /* Test each interrupt */
        for (i = 0; i < 10; i++) {
                /* Interrupt to test */
                mask = BIT(i);

                if (adapter->flags & FLAG_IS_ICH) {
                        switch (mask) {
                        case E1000_ICR_RXSEQ:
                                continue;
                        case 0x00000100:
                                if (adapter->hw.mac.type == e1000_ich8lan ||
                                    adapter->hw.mac.type == e1000_ich9lan)
                                        continue;
                                break;
                        default:
                                break;
                        }
                }

                if (!shared_int) {
                        /* Disable the interrupt to be reported in
                         * the cause register and then force the same
                         * interrupt and see if one gets posted.  If
                         * an interrupt was posted to the bus, the
                         * test failed.
                         */
                        adapter->test_icr = 0;
                        ew32(IMC, mask);
                        ew32(ICS, mask);
                        e1e_flush();
                        usleep_range(10000, 20000);

                        if (adapter->test_icr & mask) {
                                *data = 3;
                                break;
                        }
                }

                /* Enable the interrupt to be reported in
                 * the cause register and then force the same
                 * interrupt and see if one gets posted.  If
                 * an interrupt was not posted to the bus, the
                 * test failed.
                 */
                adapter->test_icr = 0;
                ew32(IMS, mask);
                ew32(ICS, mask);
                e1e_flush();
                usleep_range(10000, 20000);

                if (!(adapter->test_icr & mask)) {
                        *data = 4;
                        break;
                }

                if (!shared_int) {
                        /* Disable the other interrupts to be reported in
                         * the cause register and then force the other
                         * interrupts and see if any get posted.  If
                         * an interrupt was posted to the bus, the
                         * test failed.
                         */
                        adapter->test_icr = 0;
                        ew32(IMC, ~mask & 0x00007FFF);
                        ew32(ICS, ~mask & 0x00007FFF);
                        e1e_flush();
                        usleep_range(10000, 20000);

                        if (adapter->test_icr) {
                                *data = 5;
                                break;
                        }
                }
        }

        /* Disable all the interrupts */
        ew32(IMC, 0xFFFFFFFF);
        e1e_flush();
        usleep_range(10000, 20000);

        /* Unhook test interrupt handler */
        free_irq(irq, netdev);

out:
        if (int_mode == E1000E_INT_MODE_MSIX) {
                e1000e_reset_interrupt_capability(adapter);
                adapter->int_mode = int_mode;
                e1000e_set_interrupt_capability(adapter);
        }

        return ret_val;
}

static void e1000_free_desc_rings(struct e1000_adapter *adapter)
{
        struct e1000_ring *tx_ring = &adapter->test_tx_ring;
        struct e1000_ring *rx_ring = &adapter->test_rx_ring;
        struct pci_dev *pdev = adapter->pdev;
        struct e1000_buffer *buffer_info;
        int i;

        if (tx_ring->desc && tx_ring->buffer_info) {
                for (i = 0; i < tx_ring->count; i++) {
                        buffer_info = &tx_ring->buffer_info[i];

                        if (buffer_info->dma)
                                dma_unmap_single(&pdev->dev,
                                                 buffer_info->dma,
                                                 buffer_info->length,
                                                 DMA_TO_DEVICE);
                        if (buffer_info->skb)
                                dev_kfree_skb(buffer_info->skb);
                }
        }

        if (rx_ring->desc && rx_ring->buffer_info) {
                for (i = 0; i < rx_ring->count; i++) {
                        buffer_info = &rx_ring->buffer_info[i];

                        if (buffer_info->dma)
                                dma_unmap_single(&pdev->dev,
                                                 buffer_info->dma,
                                                 2048, DMA_FROM_DEVICE);
                        if (buffer_info->skb)
                                dev_kfree_skb(buffer_info->skb);
                }
        }

        if (tx_ring->desc) {
                dma_free_coherent(&pdev->dev, tx_ring->size, tx_ring->desc,
                                  tx_ring->dma);
                tx_ring->desc = NULL;
        }
        if (rx_ring->desc) {
                dma_free_coherent(&pdev->dev, rx_ring->size, rx_ring->desc,
                                  rx_ring->dma);
                rx_ring->desc = NULL;
        }

        kfree(tx_ring->buffer_info);
        tx_ring->buffer_info = NULL;
        kfree(rx_ring->buffer_info);
        rx_ring->buffer_info = NULL;
}

static int e1000_setup_desc_rings(struct e1000_adapter *adapter)
{
        struct e1000_ring *tx_ring = &adapter->test_tx_ring;
        struct e1000_ring *rx_ring = &adapter->test_rx_ring;
        struct pci_dev *pdev = adapter->pdev;
        struct e1000_hw *hw = &adapter->hw;
        u32 rctl;
        int i;
        int ret_val;

        /* Setup Tx descriptor ring and Tx buffers */

        if (!tx_ring->count)
                tx_ring->count = E1000_DEFAULT_TXD;

        tx_ring->buffer_info = kcalloc(tx_ring->count,
                                       sizeof(struct e1000_buffer), GFP_KERNEL);
        if (!tx_ring->buffer_info) {
                ret_val = 1;
                goto err_nomem;
        }

        tx_ring->size = tx_ring->count * sizeof(struct e1000_tx_desc);
        tx_ring->size = ALIGN(tx_ring->size, 4096);
        tx_ring->desc = dma_alloc_coherent(&pdev->dev, tx_ring->size,
                                           &tx_ring->dma, GFP_KERNEL);
        if (!tx_ring->desc) {
                ret_val = 2;
                goto err_nomem;
        }
        tx_ring->next_to_use = 0;
        tx_ring->next_to_clean = 0;

        ew32(TDBAL(0), ((u64)tx_ring->dma & 0x00000000FFFFFFFF));
        ew32(TDBAH(0), ((u64)tx_ring->dma >> 32));
        ew32(TDLEN(0), tx_ring->count * sizeof(struct e1000_tx_desc));
        ew32(TDH(0), 0);
        ew32(TDT(0), 0);
        ew32(TCTL, E1000_TCTL_PSP | E1000_TCTL_EN | E1000_TCTL_MULR |
             E1000_COLLISION_THRESHOLD << E1000_CT_SHIFT |
             E1000_COLLISION_DISTANCE << E1000_COLD_SHIFT);

        for (i = 0; i < tx_ring->count; i++) {
                struct e1000_tx_desc *tx_desc = E1000_TX_DESC(*tx_ring, i);
                struct sk_buff *skb;
                unsigned int skb_size = 1024;

                skb = alloc_skb(skb_size, GFP_KERNEL);
                if (!skb) {
                        ret_val = 3;
                        goto err_nomem;
                }
                skb_put(skb, skb_size);
                tx_ring->buffer_info[i].skb = skb;
                tx_ring->buffer_info[i].length = skb->len;
                tx_ring->buffer_info[i].dma =
                    dma_map_single(&pdev->dev, skb->data, skb->len,
                                   DMA_TO_DEVICE);
                if (dma_mapping_error(&pdev->dev,
                                      tx_ring->buffer_info[i].dma)) {
                        ret_val = 4;
                        goto err_nomem;
                }
                tx_desc->buffer_addr = cpu_to_le64(tx_ring->buffer_info[i].dma);
                tx_desc->lower.data = cpu_to_le32(skb->len);
                tx_desc->lower.data |= cpu_to_le32(E1000_TXD_CMD_EOP |
                                                   E1000_TXD_CMD_IFCS |
                                                   E1000_TXD_CMD_RS);
                tx_desc->upper.data = 0;
        }

        /* Setup Rx descriptor ring and Rx buffers */

        if (!rx_ring->count)
                rx_ring->count = E1000_DEFAULT_RXD;

        rx_ring->buffer_info = kcalloc(rx_ring->count,
                                       sizeof(struct e1000_buffer), GFP_KERNEL);
        if (!rx_ring->buffer_info) {
                ret_val = 5;
                goto err_nomem;
        }

        rx_ring->size = rx_ring->count * sizeof(union e1000_rx_desc_extended);
        rx_ring->desc = dma_alloc_coherent(&pdev->dev, rx_ring->size,
                                           &rx_ring->dma, GFP_KERNEL);
        if (!rx_ring->desc) {
                ret_val = 6;
                goto err_nomem;
        }
        rx_ring->next_to_use = 0;
        rx_ring->next_to_clean = 0;

        rctl = er32(RCTL);
        if (!(adapter->flags2 & FLAG2_NO_DISABLE_RX))
                ew32(RCTL, rctl & ~E1000_RCTL_EN);
        ew32(RDBAL(0), ((u64)rx_ring->dma & 0xFFFFFFFF));
        ew32(RDBAH(0), ((u64)rx_ring->dma >> 32));
        ew32(RDLEN(0), rx_ring->size);
        ew32(RDH(0), 0);
        ew32(RDT(0), 0);
        rctl = E1000_RCTL_EN | E1000_RCTL_BAM | E1000_RCTL_SZ_2048 |
            E1000_RCTL_UPE | E1000_RCTL_MPE | E1000_RCTL_LPE |
            E1000_RCTL_SBP | E1000_RCTL_SECRC |
            E1000_RCTL_LBM_NO | E1000_RCTL_RDMTS_HALF |
            (adapter->hw.mac.mc_filter_type << E1000_RCTL_MO_SHIFT);
        ew32(RCTL, rctl);

        for (i = 0; i < rx_ring->count; i++) {
                union e1000_rx_desc_extended *rx_desc;
                struct sk_buff *skb;

                skb = alloc_skb(2048 + NET_IP_ALIGN, GFP_KERNEL);
                if (!skb) {
                        ret_val = 7;
                        goto err_nomem;
                }
                skb_reserve(skb, NET_IP_ALIGN);
                rx_ring->buffer_info[i].skb = skb;
                rx_ring->buffer_info[i].dma =
                    dma_map_single(&pdev->dev, skb->data, 2048,
                                   DMA_FROM_DEVICE);
                if (dma_mapping_error(&pdev->dev,
                                      rx_ring->buffer_info[i].dma)) {
                        ret_val = 8;
                        goto err_nomem;
                }
                rx_desc = E1000_RX_DESC_EXT(*rx_ring, i);
                rx_desc->read.buffer_addr =
                    cpu_to_le64(rx_ring->buffer_info[i].dma);
                memset(skb->data, 0x00, skb->len);
        }

        return 0;

err_nomem:
        e1000_free_desc_rings(adapter);
        return ret_val;
}

static void e1000_phy_disable_receiver(struct e1000_adapter *adapter)
{
        /* Write out to PHY registers 29 and 30 to disable the Receiver. */
        e1e_wphy(&adapter->hw, 29, 0x001F);
        e1e_wphy(&adapter->hw, 30, 0x8FFC);
        e1e_wphy(&adapter->hw, 29, 0x001A);
        e1e_wphy(&adapter->hw, 30, 0x8FF0);
}

static int e1000_integrated_phy_loopback(struct e1000_adapter *adapter)
{
        struct e1000_hw *hw = &adapter->hw;
        u32 ctrl_reg = 0;
        u16 phy_reg = 0;
        s32 ret_val = 0;

        hw->mac.autoneg = 0;

        if (hw->phy.type == e1000_phy_ife) {
                /* force 100, set loopback */
                e1e_wphy(hw, MII_BMCR, 0x6100);

                /* Now set up the MAC to the same speed/duplex as the PHY. */
                ctrl_reg = er32(CTRL);
                ctrl_reg &= ~E1000_CTRL_SPD_SEL; /* Clear the speed sel bits */
                ctrl_reg |= (E1000_CTRL_FRCSPD | /* Set the Force Speed Bit */
                             E1000_CTRL_FRCDPX | /* Set the Force Duplex Bit */
                             E1000_CTRL_SPD_100 |/* Force Speed to 100 */
                             E1000_CTRL_FD);     /* Force Duplex to FULL */

                ew32(CTRL, ctrl_reg);
                e1e_flush();
                usleep_range(500, 1000);

                return 0;
        }

        /* Specific PHY configuration for loopback */
        switch (hw->phy.type) {
        case e1000_phy_m88:
                /* Auto-MDI/MDIX Off */
                e1e_wphy(hw, M88E1000_PHY_SPEC_CTRL, 0x0808);
                /* reset to update Auto-MDI/MDIX */
                e1e_wphy(hw, MII_BMCR, 0x9140);
                /* autoneg off */
                e1e_wphy(hw, MII_BMCR, 0x8140);
                break;
        case e1000_phy_gg82563:
                e1e_wphy(hw, GG82563_PHY_KMRN_MODE_CTRL, 0x1CC);
                break;
        case e1000_phy_bm:
                /* Set Default MAC Interface speed to 1GB */
                e1e_rphy(hw, PHY_REG(2, 21), &phy_reg);
                phy_reg &= ~0x0007;
                phy_reg |= 0x006;
                e1e_wphy(hw, PHY_REG(2, 21), phy_reg);
                /* Assert SW reset for above settings to take effect */
                hw->phy.ops.commit(hw);
                usleep_range(1000, 2000);
                /* Force Full Duplex */
                e1e_rphy(hw, PHY_REG(769, 16), &phy_reg);
                e1e_wphy(hw, PHY_REG(769, 16), phy_reg | 0x000C);
                /* Set Link Up (in force link) */
                e1e_rphy(hw, PHY_REG(776, 16), &phy_reg);
                e1e_wphy(hw, PHY_REG(776, 16), phy_reg | 0x0040);
                /* Force Link */
                e1e_rphy(hw, PHY_REG(769, 16), &phy_reg);
                e1e_wphy(hw, PHY_REG(769, 16), phy_reg | 0x0040);
                /* Set Early Link Enable */
                e1e_rphy(hw, PHY_REG(769, 20), &phy_reg);
                e1e_wphy(hw, PHY_REG(769, 20), phy_reg | 0x0400);
                break;
        case e1000_phy_82577:
        case e1000_phy_82578:
                /* Workaround: K1 must be disabled for stable 1Gbps operation */
                ret_val = hw->phy.ops.acquire(hw);
                if (ret_val) {
                        e_err("Cannot setup 1Gbps loopback.\n");
                        return ret_val;
                }
                e1000_configure_k1_ich8lan(hw, false);
                hw->phy.ops.release(hw);
                break;
        case e1000_phy_82579:
                /* Disable PHY energy detect power down */
                e1e_rphy(hw, PHY_REG(0, 21), &phy_reg);
                e1e_wphy(hw, PHY_REG(0, 21), phy_reg & ~BIT(3));
                /* Disable full chip energy detect */
                e1e_rphy(hw, PHY_REG(776, 18), &phy_reg);
                e1e_wphy(hw, PHY_REG(776, 18), phy_reg | 1);
                /* Enable loopback on the PHY */
                e1e_wphy(hw, I82577_PHY_LBK_CTRL, 0x8001);
                break;
        default:
                break;
        }

        /* force 1000, set loopback */
        e1e_wphy(hw, MII_BMCR, 0x4140);
        msleep(250);

        /* Now set up the MAC to the same speed/duplex as the PHY. */
        ctrl_reg = er32(CTRL);
        ctrl_reg &= ~E1000_CTRL_SPD_SEL; /* Clear the speed sel bits */
        ctrl_reg |= (E1000_CTRL_FRCSPD | /* Set the Force Speed Bit */
                     E1000_CTRL_FRCDPX | /* Set the Force Duplex Bit */
                     E1000_CTRL_SPD_1000 |/* Force Speed to 1000 */
                     E1000_CTRL_FD);     /* Force Duplex to FULL */

        if (adapter->flags & FLAG_IS_ICH)
                ctrl_reg |= E1000_CTRL_SLU;     /* Set Link Up */

        if (hw->phy.media_type == e1000_media_type_copper &&
            hw->phy.type == e1000_phy_m88) {
                ctrl_reg |= E1000_CTRL_ILOS;    /* Invert Loss of Signal */
        } else {
                /* Set the ILOS bit on the fiber Nic if half duplex link is
                 * detected.
                 */
                if ((er32(STATUS) & E1000_STATUS_FD) == 0)
                        ctrl_reg |= (E1000_CTRL_ILOS | E1000_CTRL_SLU);
        }

        ew32(CTRL, ctrl_reg);

        /* Disable the receiver on the PHY so when a cable is plugged in, the
         * PHY does not begin to autoneg when a cable is reconnected to the NIC.
         */
        if (hw->phy.type == e1000_phy_m88)
                e1000_phy_disable_receiver(adapter);

        usleep_range(500, 1000);

        return 0;
}

static int e1000_set_82571_fiber_loopback(struct e1000_adapter *adapter)
{
        struct e1000_hw *hw = &adapter->hw;
        u32 ctrl = er32(CTRL);
        int link;

        /* special requirements for 82571/82572 fiber adapters */

        /* jump through hoops to make sure link is up because serdes
         * link is hardwired up
         */
        ctrl |= E1000_CTRL_SLU;
        ew32(CTRL, ctrl);

        /* disable autoneg */
        ctrl = er32(TXCW);
        ctrl &= ~BIT(31);
        ew32(TXCW, ctrl);

        link = (er32(STATUS) & E1000_STATUS_LU);

        if (!link) {
                /* set invert loss of signal */
                ctrl = er32(CTRL);
                ctrl |= E1000_CTRL_ILOS;
                ew32(CTRL, ctrl);
        }

        /* special write to serdes control register to enable SerDes analog
         * loopback
         */
        ew32(SCTL, E1000_SCTL_ENABLE_SERDES_LOOPBACK);
        e1e_flush();
        usleep_range(10000, 20000);

        return 0;
}

/* only call this for fiber/serdes connections to es2lan */
static int e1000_set_es2lan_mac_loopback(struct e1000_adapter *adapter)
{
        struct e1000_hw *hw = &adapter->hw;
        u32 ctrlext = er32(CTRL_EXT);
        u32 ctrl = er32(CTRL);

        /* save CTRL_EXT to restore later, reuse an empty variable (unused
         * on mac_type 80003es2lan)
         */
        adapter->tx_fifo_head = ctrlext;

        /* clear the serdes mode bits, putting the device into mac loopback */
        ctrlext &= ~E1000_CTRL_EXT_LINK_MODE_PCIE_SERDES;
        ew32(CTRL_EXT, ctrlext);

        /* force speed to 1000/FD, link up */
        ctrl &= ~(E1000_CTRL_SPD_1000 | E1000_CTRL_SPD_100);
        ctrl |= (E1000_CTRL_SLU | E1000_CTRL_FRCSPD | E1000_CTRL_FRCDPX |
                 E1000_CTRL_SPD_1000 | E1000_CTRL_FD);
        ew32(CTRL, ctrl);

        /* set mac loopback */
        ctrl = er32(RCTL);
        ctrl |= E1000_RCTL_LBM_MAC;
        ew32(RCTL, ctrl);

        /* set testing mode parameters (no need to reset later) */
#define KMRNCTRLSTA_OPMODE (0x1F << 16)
#define KMRNCTRLSTA_OPMODE_1GB_FD_GMII 0x0582
        ew32(KMRNCTRLSTA,
             (KMRNCTRLSTA_OPMODE | KMRNCTRLSTA_OPMODE_1GB_FD_GMII));

        return 0;
}

static int e1000_setup_loopback_test(struct e1000_adapter *adapter)
{
        struct e1000_hw *hw = &adapter->hw;
        u32 rctl, fext_nvm11, tarc0;

        if (hw->mac.type >= e1000_pch_spt) {
                fext_nvm11 = er32(FEXTNVM11);
                fext_nvm11 |= E1000_FEXTNVM11_DISABLE_MULR_FIX;
                ew32(FEXTNVM11, fext_nvm11);
                tarc0 = er32(TARC(0));
                /* clear bits 28 & 29 (control of MULR concurrent requests) */
                tarc0 &= 0xcfffffff;
                /* set bit 29 (value of MULR requests is now 2) */
                tarc0 |= 0x20000000;
                ew32(TARC(0), tarc0);
        }
        if (hw->phy.media_type == e1000_media_type_fiber ||
            hw->phy.media_type == e1000_media_type_internal_serdes) {
                switch (hw->mac.type) {
                case e1000_80003es2lan:
                        return e1000_set_es2lan_mac_loopback(adapter);
                case e1000_82571:
                case e1000_82572:
                        return e1000_set_82571_fiber_loopback(adapter);
                default:
                        rctl = er32(RCTL);
                        rctl |= E1000_RCTL_LBM_TCVR;
                        ew32(RCTL, rctl);
                        return 0;
                }
        } else if (hw->phy.media_type == e1000_media_type_copper) {
                return e1000_integrated_phy_loopback(adapter);
        }

        return 7;
}

static void e1000_loopback_cleanup(struct e1000_adapter *adapter)
{
        struct e1000_hw *hw = &adapter->hw;
        u32 rctl, fext_nvm11, tarc0;
        u16 phy_reg;

        rctl = er32(RCTL);
        rctl &= ~(E1000_RCTL_LBM_TCVR | E1000_RCTL_LBM_MAC);
        ew32(RCTL, rctl);

        switch (hw->mac.type) {
        case e1000_pch_spt:
        case e1000_pch_cnp:
                fext_nvm11 = er32(FEXTNVM11);
                fext_nvm11 &= ~E1000_FEXTNVM11_DISABLE_MULR_FIX;
                ew32(FEXTNVM11, fext_nvm11);
                tarc0 = er32(TARC(0));
                /* clear bits 28 & 29 (control of MULR concurrent requests) */
                /* set bit 29 (value of MULR requests is now 0) */
                tarc0 &= 0xcfffffff;
                ew32(TARC(0), tarc0);
                /* fall through */
        case e1000_80003es2lan:
                if (hw->phy.media_type == e1000_media_type_fiber ||
                    hw->phy.media_type == e1000_media_type_internal_serdes) {
                        /* restore CTRL_EXT, stealing space from tx_fifo_head */
                        ew32(CTRL_EXT, adapter->tx_fifo_head);
                        adapter->tx_fifo_head = 0;
                }
                /* fall through */
        case e1000_82571:
        case e1000_82572:
                if (hw->phy.media_type == e1000_media_type_fiber ||
                    hw->phy.media_type == e1000_media_type_internal_serdes) {
                        ew32(SCTL, E1000_SCTL_DISABLE_SERDES_LOOPBACK);
                        e1e_flush();
                        usleep_range(10000, 20000);
                        break;
                }
                /* Fall Through */
        default:
                hw->mac.autoneg = 1;
                if (hw->phy.type == e1000_phy_gg82563)
                        e1e_wphy(hw, GG82563_PHY_KMRN_MODE_CTRL, 0x180);
                e1e_rphy(hw, MII_BMCR, &phy_reg);
                if (phy_reg & BMCR_LOOPBACK) {
                        phy_reg &= ~BMCR_LOOPBACK;
                        e1e_wphy(hw, MII_BMCR, phy_reg);
                        if (hw->phy.ops.commit)
                                hw->phy.ops.commit(hw);
                }
                break;
        }
}

static void e1000_create_lbtest_frame(struct sk_buff *skb,
                                      unsigned int frame_size)
{
        memset(skb->data, 0xFF, frame_size);
        frame_size &= ~1;
        memset(&skb->data[frame_size / 2], 0xAA, frame_size / 2 - 1);
        memset(&skb->data[frame_size / 2 + 10], 0xBE, 1);
        memset(&skb->data[frame_size / 2 + 12], 0xAF, 1);
}

static int e1000_check_lbtest_frame(struct sk_buff *skb,
                                    unsigned int frame_size)
{
        frame_size &= ~1;
        if (*(skb->data + 3) == 0xFF)
                if ((*(skb->data + frame_size / 2 + 10) == 0xBE) &&
                    (*(skb->data + frame_size / 2 + 12) == 0xAF))
                        return 0;
        return 13;
}

static int e1000_run_loopback_test(struct e1000_adapter *adapter)
{
        struct e1000_ring *tx_ring = &adapter->test_tx_ring;
        struct e1000_ring *rx_ring = &adapter->test_rx_ring;
        struct pci_dev *pdev = adapter->pdev;
        struct e1000_hw *hw = &adapter->hw;
        struct e1000_buffer *buffer_info;
        int i, j, k, l;
        int lc;
        int good_cnt;
        int ret_val = 0;
        unsigned long time;

        ew32(RDT(0), rx_ring->count - 1);

        /* Calculate the loop count based on the largest descriptor ring
         * The idea is to wrap the largest ring a number of times using 64
         * send/receive pairs during each loop
         */

        if (rx_ring->count <= tx_ring->count)
                lc = ((tx_ring->count / 64) * 2) + 1;
        else
                lc = ((rx_ring->count / 64) * 2) + 1;

        k = 0;
        l = 0;
        /* loop count loop */
        for (j = 0; j <= lc; j++) {
                /* send the packets */
                for (i = 0; i < 64; i++) {
                        buffer_info = &tx_ring->buffer_info[k];

                        e1000_create_lbtest_frame(buffer_info->skb, 1024);
                        dma_sync_single_for_device(&pdev->dev,
                                                   buffer_info->dma,
                                                   buffer_info->length,
                                                   DMA_TO_DEVICE);
                        k++;
                        if (k == tx_ring->count)
                                k = 0;
                }
                ew32(TDT(0), k);
                e1e_flush();
                msleep(200);
                time = jiffies; /* set the start time for the receive */
                good_cnt = 0;
                /* receive the sent packets */
                do {
                        buffer_info = &rx_ring->buffer_info[l];

                        dma_sync_single_for_cpu(&pdev->dev,
                                                buffer_info->dma, 2048,
                                                DMA_FROM_DEVICE);

                        ret_val = e1000_check_lbtest_frame(buffer_info->skb,
                                                           1024);
                        if (!ret_val)
                                good_cnt++;
                        l++;
                        if (l == rx_ring->count)
                                l = 0;
                        /* time + 20 msecs (200 msecs on 2.4) is more than
                         * enough time to complete the receives, if it's
                         * exceeded, break and error off
                         */
                } while ((good_cnt < 64) && !time_after(jiffies, time + 20));
                if (good_cnt != 64) {
                        ret_val = 13;   /* ret_val is the same as mis-compare */
                        break;
                }
                if (time_after(jiffies, time + 20)) {
                        ret_val = 14;   /* error code for time out error */
                        break;
                }
        }
        return ret_val;
}

static int e1000_loopback_test(struct e1000_adapter *adapter, u64 *data)
{
        struct e1000_hw *hw = &adapter->hw;

        /* PHY loopback cannot be performed if SoL/IDER sessions are active */
        if (hw->phy.ops.check_reset_block &&
            hw->phy.ops.check_reset_block(hw)) {
                e_err("Cannot do PHY loopback test when SoL/IDER is active.\n");
                *data = 0;
                goto out;
        }

        *data = e1000_setup_desc_rings(adapter);
        if (*data)
                goto out;

        *data = e1000_setup_loopback_test(adapter);
        if (*data)
                goto err_loopback;

        *data = e1000_run_loopback_test(adapter);
        e1000_loopback_cleanup(adapter);

err_loopback:
        e1000_free_desc_rings(adapter);
out:
        return *data;
}

static int e1000_link_test(struct e1000_adapter *adapter, u64 *data)
{
        struct e1000_hw *hw = &adapter->hw;

        *data = 0;
        if (hw->phy.media_type == e1000_media_type_internal_serdes) {
                int i = 0;

                hw->mac.serdes_has_link = false;

                /* On some blade server designs, link establishment
                 * could take as long as 2-3 minutes
                 */
                do {
                        hw->mac.ops.check_for_link(hw);
                        if (hw->mac.serdes_has_link)
                                return *data;
                        msleep(20);
                } while (i++ < 3750);

                *data = 1;
        } else {
                hw->mac.ops.check_for_link(hw);
                if (hw->mac.autoneg)
                        /* On some Phy/switch combinations, link establishment
                         * can take a few seconds more than expected.
                         */
                        msleep_interruptible(5000);

                if (!(er32(STATUS) & E1000_STATUS_LU))
                        *data = 1;
        }
        return *data;
}

static int e1000e_get_sset_count(struct net_device __always_unused *netdev,
                                 int sset)
{
        switch (sset) {
        case ETH_SS_TEST:
                return E1000_TEST_LEN;
        case ETH_SS_STATS:
                return E1000_STATS_LEN;
        default:
                return -EOPNOTSUPP;
        }
}

static void e1000_diag_test(struct net_device *netdev,
                            struct ethtool_test *eth_test, u64 *data)
{
        struct e1000_adapter *adapter = netdev_priv(netdev);
        u16 autoneg_advertised;
        u8 forced_speed_duplex;
        u8 autoneg;
        bool if_running = netif_running(netdev);

        pm_runtime_get_sync(netdev->dev.parent);

        set_bit(__E1000_TESTING, &adapter->state);

        if (!if_running) {
                /* Get control of and reset hardware */
                if (adapter->flags & FLAG_HAS_AMT)
                        e1000e_get_hw_control(adapter);

                e1000e_power_up_phy(adapter);

                adapter->hw.phy.autoneg_wait_to_complete = 1;
                e1000e_reset(adapter);
                adapter->hw.phy.autoneg_wait_to_complete = 0;
        }

        if (eth_test->flags == ETH_TEST_FL_OFFLINE) {
                /* Offline tests */

                /* save speed, duplex, autoneg settings */
                autoneg_advertised = adapter->hw.phy.autoneg_advertised;
                forced_speed_duplex = adapter->hw.mac.forced_speed_duplex;
                autoneg = adapter->hw.mac.autoneg;

                e_info("offline testing starting\n");

                if (if_running)
                        /* indicate we're in test mode */
                        e1000e_close(netdev);

                if (e1000_reg_test(adapter, &data[0]))
                        eth_test->flags |= ETH_TEST_FL_FAILED;

                e1000e_reset(adapter);
                if (e1000_eeprom_test(adapter, &data[1]))
                        eth_test->flags |= ETH_TEST_FL_FAILED;

                e1000e_reset(adapter);
                if (e1000_intr_test(adapter, &data[2]))
                        eth_test->flags |= ETH_TEST_FL_FAILED;

                e1000e_reset(adapter);
                if (e1000_loopback_test(adapter, &data[3]))
                        eth_test->flags |= ETH_TEST_FL_FAILED;

                /* force this routine to wait until autoneg complete/timeout */
                adapter->hw.phy.autoneg_wait_to_complete = 1;
                e1000e_reset(adapter);
                adapter->hw.phy.autoneg_wait_to_complete = 0;

                if (e1000_link_test(adapter, &data[4]))
                        eth_test->flags |= ETH_TEST_FL_FAILED;

                /* restore speed, duplex, autoneg settings */
                adapter->hw.phy.autoneg_advertised = autoneg_advertised;
                adapter->hw.mac.forced_speed_duplex = forced_speed_duplex;
                adapter->hw.mac.autoneg = autoneg;
                e1000e_reset(adapter);

                clear_bit(__E1000_TESTING, &adapter->state);
                if (if_running)
                        e1000e_open(netdev);
        } else {
                /* Online tests */

                e_info("online testing starting\n");

                /* register, eeprom, intr and loopback tests not run online */
                data[0] = 0;
                data[1] = 0;
                data[2] = 0;
                data[3] = 0;

                if (e1000_link_test(adapter, &data[4]))
                        eth_test->flags |= ETH_TEST_FL_FAILED;

                clear_bit(__E1000_TESTING, &adapter->state);
        }

        if (!if_running) {
                e1000e_reset(adapter);

                if (adapter->flags & FLAG_HAS_AMT)
                        e1000e_release_hw_control(adapter);
        }

        msleep_interruptible(4 * 1000);

        pm_runtime_put_sync(netdev->dev.parent);
}

static void e1000_get_wol(struct net_device *netdev,
                          struct ethtool_wolinfo *wol)
{
        struct e1000_adapter *adapter = netdev_priv(netdev);

        wol->supported = 0;
        wol->wolopts = 0;

        if (!(adapter->flags & FLAG_HAS_WOL) ||
            !device_can_wakeup(&adapter->pdev->dev))
                return;

        wol->supported = WAKE_UCAST | WAKE_MCAST |
            WAKE_BCAST | WAKE_MAGIC | WAKE_PHY;

        /* apply any specific unsupported masks here */
        if (adapter->flags & FLAG_NO_WAKE_UCAST) {
                wol->supported &= ~WAKE_UCAST;

                if (adapter->wol & E1000_WUFC_EX)
                        e_err("Interface does not support directed (unicast) frame wake-up packets\n");
        }

        if (adapter->wol & E1000_WUFC_EX)
                wol->wolopts |= WAKE_UCAST;
        if (adapter->wol & E1000_WUFC_MC)
                wol->wolopts |= WAKE_MCAST;
        if (adapter->wol & E1000_WUFC_BC)
                wol->wolopts |= WAKE_BCAST;
        if (adapter->wol & E1000_WUFC_MAG)
                wol->wolopts |= WAKE_MAGIC;
        if (adapter->wol & E1000_WUFC_LNKC)
                wol->wolopts |= WAKE_PHY;
}

static int e1000_set_wol(struct net_device *netdev, struct ethtool_wolinfo *wol)
{
        struct e1000_adapter *adapter = netdev_priv(netdev);

        if (!(adapter->flags & FLAG_HAS_WOL) ||
            !device_can_wakeup(&adapter->pdev->dev) ||
            (wol->wolopts & ~(WAKE_UCAST | WAKE_MCAST | WAKE_BCAST |
                              WAKE_MAGIC | WAKE_PHY)))
                return -EOPNOTSUPP;

        /* these settings will always override what we currently have */
        adapter->wol = 0;

        if (wol->wolopts & WAKE_UCAST)
                adapter->wol |= E1000_WUFC_EX;
        if (wol->wolopts & WAKE_MCAST)
                adapter->wol |= E1000_WUFC_MC;
        if (wol->wolopts & WAKE_BCAST)
                adapter->wol |= E1000_WUFC_BC;
        if (wol->wolopts & WAKE_MAGIC)
                adapter->wol |= E1000_WUFC_MAG;
        if (wol->wolopts & WAKE_PHY)
                adapter->wol |= E1000_WUFC_LNKC;

        device_set_wakeup_enable(&adapter->pdev->dev, adapter->wol);

        return 0;
}

static int e1000_set_phys_id(struct net_device *netdev,
                             enum ethtool_phys_id_state state)
{
        struct e1000_adapter *adapter = netdev_priv(netdev);
        struct e1000_hw *hw = &adapter->hw;

        switch (state) {
        case ETHTOOL_ID_ACTIVE:
                pm_runtime_get_sync(netdev->dev.parent);

                if (!hw->mac.ops.blink_led)
                        return 2;       /* cycle on/off twice per second */

                hw->mac.ops.blink_led(hw);
                break;

        case ETHTOOL_ID_INACTIVE:
                if (hw->phy.type == e1000_phy_ife)
                        e1e_wphy(hw, IFE_PHY_SPECIAL_CONTROL_LED, 0);
                hw->mac.ops.led_off(hw);
                hw->mac.ops.cleanup_led(hw);
                pm_runtime_put_sync(netdev->dev.parent);
                break;

        case ETHTOOL_ID_ON:
                hw->mac.ops.led_on(hw);
                break;

        case ETHTOOL_ID_OFF:
                hw->mac.ops.led_off(hw);
                break;
        }

        return 0;
}

static int e1000_get_coalesce(struct net_device *netdev,
                              struct ethtool_coalesce *ec)
{
        struct e1000_adapter *adapter = netdev_priv(netdev);

        if (adapter->itr_setting <= 4)
                ec->rx_coalesce_usecs = adapter->itr_setting;
        else
                ec->rx_coalesce_usecs = 1000000 / adapter->itr_setting;

        return 0;
}

static int e1000_set_coalesce(struct net_device *netdev,
                              struct ethtool_coalesce *ec)
{
        struct e1000_adapter *adapter = netdev_priv(netdev);

        if ((ec->rx_coalesce_usecs > E1000_MAX_ITR_USECS) ||
            ((ec->rx_coalesce_usecs > 4) &&
             (ec->rx_coalesce_usecs < E1000_MIN_ITR_USECS)) ||
            (ec->rx_coalesce_usecs == 2))
                return -EINVAL;

        if (ec->rx_coalesce_usecs == 4) {
                adapter->itr_setting = 4;
                adapter->itr = adapter->itr_setting;
        } else if (ec->rx_coalesce_usecs <= 3) {
                adapter->itr = 20000;
                adapter->itr_setting = ec->rx_coalesce_usecs;
        } else {
                adapter->itr = (1000000 / ec->rx_coalesce_usecs);
                adapter->itr_setting = adapter->itr & ~3;
        }

        pm_runtime_get_sync(netdev->dev.parent);

        if (adapter->itr_setting != 0)
                e1000e_write_itr(adapter, adapter->itr);
        else
                e1000e_write_itr(adapter, 0);

        pm_runtime_put_sync(netdev->dev.parent);

        return 0;
}

static int e1000_nway_reset(struct net_device *netdev)
{
        struct e1000_adapter *adapter = netdev_priv(netdev);

        if (!netif_running(netdev))
                return -EAGAIN;

        if (!adapter->hw.mac.autoneg)
                return -EINVAL;

        pm_runtime_get_sync(netdev->dev.parent);
        e1000e_reinit_locked(adapter);
        pm_runtime_put_sync(netdev->dev.parent);

        return 0;
}

static void e1000_get_ethtool_stats(struct net_device *netdev,
                                    struct ethtool_stats __always_unused *stats,
                                    u64 *data)
{
        struct e1000_adapter *adapter = netdev_priv(netdev);
        struct rtnl_link_stats64 net_stats;
        int i;
        char *p = NULL;

        pm_runtime_get_sync(netdev->dev.parent);

        dev_get_stats(netdev, &net_stats);

        pm_runtime_put_sync(netdev->dev.parent);

        for (i = 0; i < E1000_GLOBAL_STATS_LEN; i++) {
                switch (e1000_gstrings_stats[i].type) {
                case NETDEV_STATS:
                        p = (char *)&net_stats +
                            e1000_gstrings_stats[i].stat_offset;
                        break;
                case E1000_STATS:
                        p = (char *)adapter +
                            e1000_gstrings_stats[i].stat_offset;
                        break;
                default:
                        data[i] = 0;
                        continue;
                }

                data[i] = (e1000_gstrings_stats[i].sizeof_stat ==
                           sizeof(u64)) ? *(u64 *)p : *(u32 *)p;
        }
}

static void e1000_get_strings(struct net_device __always_unused *netdev,
                              u32 stringset, u8 *data)
{
        u8 *p = data;
        int i;

        switch (stringset) {
        case ETH_SS_TEST:
                memcpy(data, e1000_gstrings_test, sizeof(e1000_gstrings_test));
                break;
        case ETH_SS_STATS:
                for (i = 0; i < E1000_GLOBAL_STATS_LEN; i++) {
                        memcpy(p, e1000_gstrings_stats[i].stat_string,
                               ETH_GSTRING_LEN);
                        p += ETH_GSTRING_LEN;
                }
                break;
        }
}

static int e1000_get_rxnfc(struct net_device *netdev,
                           struct ethtool_rxnfc *info,
                           u32 __always_unused *rule_locs)
{
        info->data = 0;

        switch (info->cmd) {
        case ETHTOOL_GRXFH: {
                struct e1000_adapter *adapter = netdev_priv(netdev);
                struct e1000_hw *hw = &adapter->hw;
                u32 mrqc;

                pm_runtime_get_sync(netdev->dev.parent);
                mrqc = er32(MRQC);
                pm_runtime_put_sync(netdev->dev.parent);

                if (!(mrqc & E1000_MRQC_RSS_FIELD_MASK))
                        return 0;

                switch (info->flow_type) {
                case TCP_V4_FLOW:
                        if (mrqc & E1000_MRQC_RSS_FIELD_IPV4_TCP)
                                info->data |= RXH_L4_B_0_1 | RXH_L4_B_2_3;
                        /* fall through */
                case UDP_V4_FLOW:
                case SCTP_V4_FLOW:
                case AH_ESP_V4_FLOW:
                case IPV4_FLOW:
                        if (mrqc & E1000_MRQC_RSS_FIELD_IPV4)
                                info->data |= RXH_IP_SRC | RXH_IP_DST;
                        break;
                case TCP_V6_FLOW:
                        if (mrqc & E1000_MRQC_RSS_FIELD_IPV6_TCP)
                                info->data |= RXH_L4_B_0_1 | RXH_L4_B_2_3;
                        /* fall through */
                case UDP_V6_FLOW:
                case SCTP_V6_FLOW:
                case AH_ESP_V6_FLOW:
                case IPV6_FLOW:
                        if (mrqc & E1000_MRQC_RSS_FIELD_IPV6)
                                info->data |= RXH_IP_SRC | RXH_IP_DST;
                        break;
                default:
                        break;
                }
                return 0;
        }
        default:
                return -EOPNOTSUPP;
        }
}

static int e1000e_get_eee(struct net_device *netdev, struct ethtool_eee *edata)
{
        struct e1000_adapter *adapter = netdev_priv(netdev);
        struct e1000_hw *hw = &adapter->hw;
        u16 cap_addr, lpa_addr, pcs_stat_addr, phy_data;
        u32 ret_val;

        if (!(adapter->flags2 & FLAG2_HAS_EEE))
                return -EOPNOTSUPP;

        switch (hw->phy.type) {
        case e1000_phy_82579:
                cap_addr = I82579_EEE_CAPABILITY;
                lpa_addr = I82579_EEE_LP_ABILITY;
                pcs_stat_addr = I82579_EEE_PCS_STATUS;
                break;
        case e1000_phy_i217:
                cap_addr = I217_EEE_CAPABILITY;
                lpa_addr = I217_EEE_LP_ABILITY;
                pcs_stat_addr = I217_EEE_PCS_STATUS;
                break;
        default:
                return -EOPNOTSUPP;
        }

        pm_runtime_get_sync(netdev->dev.parent);

        ret_val = hw->phy.ops.acquire(hw);
        if (ret_val) {
                pm_runtime_put_sync(netdev->dev.parent);
                return -EBUSY;
        }

        /* EEE Capability */
        ret_val = e1000_read_emi_reg_locked(hw, cap_addr, &phy_data);
        if (ret_val)
                goto release;
        edata->supported = mmd_eee_cap_to_ethtool_sup_t(phy_data);

        /* EEE Advertised */
        edata->advertised = mmd_eee_adv_to_ethtool_adv_t(adapter->eee_advert);

        /* EEE Link Partner Advertised */
        ret_val = e1000_read_emi_reg_locked(hw, lpa_addr, &phy_data);
        if (ret_val)
                goto release;
        edata->lp_advertised = mmd_eee_adv_to_ethtool_adv_t(phy_data);

        /* EEE PCS Status */
        ret_val = e1000_read_emi_reg_locked(hw, pcs_stat_addr, &phy_data);
        if (ret_val)
                goto release;
        if (hw->phy.type == e1000_phy_82579)
                phy_data <<= 8;

        /* Result of the EEE auto negotiation - there is no register that
         * has the status of the EEE negotiation so do a best-guess based
         * on whether Tx or Rx LPI indications have been received.
         */
        if (phy_data & (E1000_EEE_TX_LPI_RCVD | E1000_EEE_RX_LPI_RCVD))
                edata->eee_active = true;

        edata->eee_enabled = !hw->dev_spec.ich8lan.eee_disable;
        edata->tx_lpi_enabled = true;
        edata->tx_lpi_timer = er32(LPIC) >> E1000_LPIC_LPIET_SHIFT;

release:
        hw->phy.ops.release(hw);
        if (ret_val)
                ret_val = -ENODATA;

        pm_runtime_put_sync(netdev->dev.parent);

        return ret_val;
}

static int e1000e_set_eee(struct net_device *netdev, struct ethtool_eee *edata)
{
        struct e1000_adapter *adapter = netdev_priv(netdev);
        struct e1000_hw *hw = &adapter->hw;
        struct ethtool_eee eee_curr;
        s32 ret_val;

        ret_val = e1000e_get_eee(netdev, &eee_curr);
        if (ret_val)
                return ret_val;

        if (eee_curr.tx_lpi_enabled != edata->tx_lpi_enabled) {
                e_err("Setting EEE tx-lpi is not supported\n");
                return -EINVAL;
        }

        if (eee_curr.tx_lpi_timer != edata->tx_lpi_timer) {
                e_err("Setting EEE Tx LPI timer is not supported\n");
                return -EINVAL;
        }

        if (edata->advertised & ~(ADVERTISE_100_FULL | ADVERTISE_1000_FULL)) {
                e_err("EEE advertisement supports only 100TX and/or 1000T full-duplex\n");
                return -EINVAL;
        }

        adapter->eee_advert = ethtool_adv_to_mmd_eee_adv_t(edata->advertised);

        hw->dev_spec.ich8lan.eee_disable = !edata->eee_enabled;

        pm_runtime_get_sync(netdev->dev.parent);

        /* reset the link */
        if (netif_running(netdev))
                e1000e_reinit_locked(adapter);
        else
                e1000e_reset(adapter);

        pm_runtime_put_sync(netdev->dev.parent);

        return 0;
}

static int e1000e_get_ts_info(struct net_device *netdev,
                              struct ethtool_ts_info *info)
{
        struct e1000_adapter *adapter = netdev_priv(netdev);

        ethtool_op_get_ts_info(netdev, info);

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

        info->so_timestamping |= (SOF_TIMESTAMPING_TX_HARDWARE |
                                  SOF_TIMESTAMPING_RX_HARDWARE |
                                  SOF_TIMESTAMPING_RAW_HARDWARE);

        info->tx_types = BIT(HWTSTAMP_TX_OFF) | BIT(HWTSTAMP_TX_ON);

        info->rx_filters = (BIT(HWTSTAMP_FILTER_NONE) |
                            BIT(HWTSTAMP_FILTER_PTP_V1_L4_SYNC) |
                            BIT(HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ) |
                            BIT(HWTSTAMP_FILTER_PTP_V2_L4_SYNC) |
                            BIT(HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ) |
                            BIT(HWTSTAMP_FILTER_PTP_V2_L2_SYNC) |
                            BIT(HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ) |
                            BIT(HWTSTAMP_FILTER_PTP_V2_EVENT) |
                            BIT(HWTSTAMP_FILTER_PTP_V2_SYNC) |
                            BIT(HWTSTAMP_FILTER_PTP_V2_DELAY_REQ) |
                            BIT(HWTSTAMP_FILTER_ALL));

        if (adapter->ptp_clock)
                info->phc_index = ptp_clock_index(adapter->ptp_clock);

        return 0;
}

static const struct ethtool_ops e1000_ethtool_ops = {
        .get_drvinfo            = e1000_get_drvinfo,
        .get_regs_len           = e1000_get_regs_len,
        .get_regs               = e1000_get_regs,
        .get_wol                = e1000_get_wol,
        .set_wol                = e1000_set_wol,
        .get_msglevel           = e1000_get_msglevel,
        .set_msglevel           = e1000_set_msglevel,
        .nway_reset             = e1000_nway_reset,
        .get_link               = ethtool_op_get_link,
        .get_eeprom_len         = e1000_get_eeprom_len,
        .get_eeprom             = e1000_get_eeprom,
        .set_eeprom             = e1000_set_eeprom,
        .get_ringparam          = e1000_get_ringparam,
        .set_ringparam          = e1000_set_ringparam,
        .get_pauseparam         = e1000_get_pauseparam,
        .set_pauseparam         = e1000_set_pauseparam,
        .self_test              = e1000_diag_test,
        .get_strings            = e1000_get_strings,
        .set_phys_id            = e1000_set_phys_id,
        .get_ethtool_stats      = e1000_get_ethtool_stats,
        .get_sset_count         = e1000e_get_sset_count,
        .get_coalesce           = e1000_get_coalesce,
        .set_coalesce           = e1000_set_coalesce,
        .get_rxnfc              = e1000_get_rxnfc,
        .get_ts_info            = e1000e_get_ts_info,
        .get_eee                = e1000e_get_eee,
        .set_eee                = e1000e_set_eee,
        .get_link_ksettings     = e1000_get_link_ksettings,
        .set_link_ksettings     = e1000_set_link_ksettings,
};

void e1000e_set_ethtool_ops(struct net_device *netdev)
{
        netdev->ethtool_ops = &e1000_ethtool_ops;
}