// SPDX-License-Identifier: GPL-2.0
/* Copyright(c) 1999 - 2006 Intel Corporation. */

#include "e1000.h"

/* This is the only thing that needs to be changed to adjust the
 * maximum number of ports that the driver can manage.
 */

#define E1000_MAX_NIC 32

#define OPTION_UNSET   -1
#define OPTION_DISABLED 0
#define OPTION_ENABLED  1

/* All parameters are treated the same, as an integer array of values.
 * This macro just reduces the need to repeat the same declaration code
 * over and over (plus this helps to avoid typo bugs).
 */

#define E1000_PARAM_INIT { [0 ... E1000_MAX_NIC] = OPTION_UNSET }
#define E1000_PARAM(X, desc) \
        static int X[E1000_MAX_NIC+1] = E1000_PARAM_INIT; \
        static unsigned int num_##X; \
        module_param_array_named(X, X, int, &num_##X, 0); \
        MODULE_PARM_DESC(X, desc);

/* Transmit Descriptor Count
 *
 * Valid Range: 80-256 for 82542 and 82543 gigabit ethernet controllers
 * Valid Range: 80-4096 for 82544 and newer
 *
 * Default Value: 256
 */
E1000_PARAM(TxDescriptors, "Number of transmit descriptors");

/* Receive Descriptor Count
 *
 * Valid Range: 80-256 for 82542 and 82543 gigabit ethernet controllers
 * Valid Range: 80-4096 for 82544 and newer
 *
 * Default Value: 256
 */
E1000_PARAM(RxDescriptors, "Number of receive descriptors");

/* User Specified Speed Override
 *
 * Valid Range: 0, 10, 100, 1000
 *  - 0    - auto-negotiate at all supported speeds
 *  - 10   - only link at 10 Mbps
 *  - 100  - only link at 100 Mbps
 *  - 1000 - only link at 1000 Mbps
 *
 * Default Value: 0
 */
E1000_PARAM(Speed, "Speed setting");

/* User Specified Duplex Override
 *
 * Valid Range: 0-2
 *  - 0 - auto-negotiate for duplex
 *  - 1 - only link at half duplex
 *  - 2 - only link at full duplex
 *
 * Default Value: 0
 */
E1000_PARAM(Duplex, "Duplex setting");

/* Auto-negotiation Advertisement Override
 *
 * Valid Range: 0x01-0x0F, 0x20-0x2F (copper); 0x20 (fiber)
 *
 * The AutoNeg value is a bit mask describing which speed and duplex
 * combinations should be advertised during auto-negotiation.
 * The supported speed and duplex modes are listed below
 *
 * Bit           7     6     5      4      3     2     1      0
 * Speed (Mbps)  N/A   N/A   1000   N/A    100   100   10     10
 * Duplex                    Full          Full  Half  Full   Half
 *
 * Default Value: 0x2F (copper); 0x20 (fiber)
 */
E1000_PARAM(AutoNeg, "Advertised auto-negotiation setting");
#define AUTONEG_ADV_DEFAULT  0x2F

/* User Specified Flow Control Override
 *
 * Valid Range: 0-3
 *  - 0 - No Flow Control
 *  - 1 - Rx only, respond to PAUSE frames but do not generate them
 *  - 2 - Tx only, generate PAUSE frames but ignore them on receive
 *  - 3 - Full Flow Control Support
 *
 * Default Value: Read flow control settings from the EEPROM
 */
E1000_PARAM(FlowControl, "Flow Control setting");

/* XsumRX - Receive Checksum Offload Enable/Disable
 *
 * Valid Range: 0, 1
 *  - 0 - disables all checksum offload
 *  - 1 - enables receive IP/TCP/UDP checksum offload
 *        on 82543 and newer -based NICs
 *
 * Default Value: 1
 */
E1000_PARAM(XsumRX, "Disable or enable Receive Checksum offload");

/* Transmit Interrupt Delay in units of 1.024 microseconds
 *  Tx interrupt delay needs to typically be set to something non zero
 *
 * Valid Range: 0-65535
 */
E1000_PARAM(TxIntDelay, "Transmit Interrupt Delay");
#define DEFAULT_TIDV                   8
#define MAX_TXDELAY               0xFFFF
#define MIN_TXDELAY                    0

/* Transmit Absolute Interrupt Delay in units of 1.024 microseconds
 *
 * Valid Range: 0-65535
 */
E1000_PARAM(TxAbsIntDelay, "Transmit Absolute Interrupt Delay");
#define DEFAULT_TADV                  32
#define MAX_TXABSDELAY            0xFFFF
#define MIN_TXABSDELAY                 0

/* Receive Interrupt Delay in units of 1.024 microseconds
 *   hardware will likely hang if you set this to anything but zero.
 *
 * Valid Range: 0-65535
 */
E1000_PARAM(RxIntDelay, "Receive Interrupt Delay");
#define DEFAULT_RDTR                   0
#define MAX_RXDELAY               0xFFFF
#define MIN_RXDELAY                    0

/* Receive Absolute Interrupt Delay in units of 1.024 microseconds
 *
 * Valid Range: 0-65535
 */
E1000_PARAM(RxAbsIntDelay, "Receive Absolute Interrupt Delay");
#define DEFAULT_RADV                   8
#define MAX_RXABSDELAY            0xFFFF
#define MIN_RXABSDELAY                 0

/* Interrupt Throttle Rate (interrupts/sec)
 *
 * Valid Range: 100-100000 (0=off, 1=dynamic, 3=dynamic conservative)
 */
E1000_PARAM(InterruptThrottleRate, "Interrupt Throttling Rate");
#define DEFAULT_ITR                    3
#define MAX_ITR                   100000
#define MIN_ITR                      100

/* Enable Smart Power Down of the PHY
 *
 * Valid Range: 0, 1
 *
 * Default Value: 0 (disabled)
 */
E1000_PARAM(SmartPowerDownEnable, "Enable PHY smart power down");

struct e1000_option {
        enum { enable_option, range_option, list_option } type;
        const char *name;
        const char *err;
        int def;
        union {
                struct { /* range_option info */
                        int min;
                        int max;
                } r;
                struct { /* list_option info */
                        int nr;
                        const struct e1000_opt_list { int i; char *str; } *p;
                } l;
        } arg;
};

static int e1000_validate_option(unsigned int *value,
                                 const struct e1000_option *opt,
                                 struct e1000_adapter *adapter)
{
        if (*value == OPTION_UNSET) {
                *value = opt->def;
                return 0;
        }

        switch (opt->type) {
        case enable_option:
                switch (*value) {
                case OPTION_ENABLED:
                        e_dev_info("%s Enabled\n", opt->name);
                        return 0;
                case OPTION_DISABLED:
                        e_dev_info("%s Disabled\n", opt->name);
                        return 0;
                }
                break;
        case range_option:
                if (*value >= opt->arg.r.min && *value <= opt->arg.r.max) {
                        e_dev_info("%s set to %i\n", opt->name, *value);
                        return 0;
                }
                break;
        case list_option: {
                int i;
                const struct e1000_opt_list *ent;

                for (i = 0; i < opt->arg.l.nr; i++) {
                        ent = &opt->arg.l.p[i];
                        if (*value == ent->i) {
                                if (ent->str[0] != '\0')
                                        e_dev_info("%s\n", ent->str);
                                return 0;
                        }
                }
        }
                break;
        default:
                BUG();
        }

        e_dev_info("Invalid %s value specified (%i) %s\n",
               opt->name, *value, opt->err);
        *value = opt->def;
        return -1;
}

static void e1000_check_fiber_options(struct e1000_adapter *adapter);
static void e1000_check_copper_options(struct e1000_adapter *adapter);

/**
 * e1000_check_options - Range Checking for Command Line Parameters
 * @adapter: board private structure
 *
 * This routine checks all command line parameters for valid user
 * input.  If an invalid value is given, or if no user specified
 * value exists, a default value is used.  The final value is stored
 * in a variable in the adapter structure.
 **/
void e1000_check_options(struct e1000_adapter *adapter)
{
        struct e1000_option opt;
        int bd = adapter->bd_number;

        if (bd >= E1000_MAX_NIC) {
                e_dev_warn("Warning: no configuration for board #%i "
                           "using defaults for all values\n", bd);
        }

        { /* Transmit Descriptor Count */
                struct e1000_tx_ring *tx_ring = adapter->tx_ring;
                int i;
                e1000_mac_type mac_type = adapter->hw.mac_type;

                opt = (struct e1000_option) {
                        .type = range_option,
                        .name = "Transmit Descriptors",
                        .err  = "using default of "
                                __MODULE_STRING(E1000_DEFAULT_TXD),
                        .def  = E1000_DEFAULT_TXD,
                        .arg  = { .r = {
                                .min = E1000_MIN_TXD,
                                .max = mac_type < e1000_82544 ? E1000_MAX_TXD : E1000_MAX_82544_TXD
                                }}
                };

                if (num_TxDescriptors > bd) {
                        tx_ring->count = TxDescriptors[bd];
                        e1000_validate_option(&tx_ring->count, &opt, adapter);
                        tx_ring->count = ALIGN(tx_ring->count,
                                                REQ_TX_DESCRIPTOR_MULTIPLE);
                } else {
                        tx_ring->count = opt.def;
                }
                for (i = 0; i < adapter->num_tx_queues; i++)
                        tx_ring[i].count = tx_ring->count;
        }
        { /* Receive Descriptor Count */
                struct e1000_rx_ring *rx_ring = adapter->rx_ring;
                int i;
                e1000_mac_type mac_type = adapter->hw.mac_type;

                opt = (struct e1000_option) {
                        .type = range_option,
                        .name = "Receive Descriptors",
                        .err  = "using default of "
                                __MODULE_STRING(E1000_DEFAULT_RXD),
                        .def  = E1000_DEFAULT_RXD,
                        .arg  = { .r = {
                                .min = E1000_MIN_RXD,
                                .max = mac_type < e1000_82544 ? E1000_MAX_RXD :
                                       E1000_MAX_82544_RXD
                        }}
                };

                if (num_RxDescriptors > bd) {
                        rx_ring->count = RxDescriptors[bd];
                        e1000_validate_option(&rx_ring->count, &opt, adapter);
                        rx_ring->count = ALIGN(rx_ring->count,
                                                REQ_RX_DESCRIPTOR_MULTIPLE);
                } else {
                        rx_ring->count = opt.def;
                }
                for (i = 0; i < adapter->num_rx_queues; i++)
                        rx_ring[i].count = rx_ring->count;
        }
        { /* Checksum Offload Enable/Disable */
                opt = (struct e1000_option) {
                        .type = enable_option,
                        .name = "Checksum Offload",
                        .err  = "defaulting to Enabled",
                        .def  = OPTION_ENABLED
                };

                if (num_XsumRX > bd) {
                        unsigned int rx_csum = XsumRX[bd];
                        e1000_validate_option(&rx_csum, &opt, adapter);
                        adapter->rx_csum = rx_csum;
                } else {
                        adapter->rx_csum = opt.def;
                }
        }
        { /* Flow Control */

                static const struct e1000_opt_list fc_list[] = {
                       { E1000_FC_NONE, "Flow Control Disabled" },
                       { E1000_FC_RX_PAUSE, "Flow Control Receive Only" },
                       { E1000_FC_TX_PAUSE, "Flow Control Transmit Only" },
                       { E1000_FC_FULL, "Flow Control Enabled" },
                       { E1000_FC_DEFAULT, "Flow Control Hardware Default" }
                };

                opt = (struct e1000_option) {
                        .type = list_option,
                        .name = "Flow Control",
                        .err  = "reading default settings from EEPROM",
                        .def  = E1000_FC_DEFAULT,
                        .arg  = { .l = { .nr = ARRAY_SIZE(fc_list),
                                         .p = fc_list }}
                };

                if (num_FlowControl > bd) {
                        unsigned int fc = FlowControl[bd];
                        e1000_validate_option(&fc, &opt, adapter);
                        adapter->hw.fc = adapter->hw.original_fc = fc;
                } else {
                        adapter->hw.fc = adapter->hw.original_fc = opt.def;
                }
        }
        { /* Transmit Interrupt Delay */
                opt = (struct e1000_option) {
                        .type = range_option,
                        .name = "Transmit Interrupt Delay",
                        .err  = "using default of " __MODULE_STRING(DEFAULT_TIDV),
                        .def  = DEFAULT_TIDV,
                        .arg  = { .r = { .min = MIN_TXDELAY,
                                         .max = MAX_TXDELAY }}
                };

                if (num_TxIntDelay > bd) {
                        adapter->tx_int_delay = TxIntDelay[bd];
                        e1000_validate_option(&adapter->tx_int_delay, &opt,
                                              adapter);
                } else {
                        adapter->tx_int_delay = opt.def;
                }
        }
        { /* Transmit Absolute Interrupt Delay */
                opt = (struct e1000_option) {
                        .type = range_option,
                        .name = "Transmit Absolute Interrupt Delay",
                        .err  = "using default of " __MODULE_STRING(DEFAULT_TADV),
                        .def  = DEFAULT_TADV,
                        .arg  = { .r = { .min = MIN_TXABSDELAY,
                                         .max = MAX_TXABSDELAY }}
                };

                if (num_TxAbsIntDelay > bd) {
                        adapter->tx_abs_int_delay = TxAbsIntDelay[bd];
                        e1000_validate_option(&adapter->tx_abs_int_delay, &opt,
                                              adapter);
                } else {
                        adapter->tx_abs_int_delay = opt.def;
                }
        }
        { /* Receive Interrupt Delay */
                opt = (struct e1000_option) {
                        .type = range_option,
                        .name = "Receive Interrupt Delay",
                        .err  = "using default of " __MODULE_STRING(DEFAULT_RDTR),
                        .def  = DEFAULT_RDTR,
                        .arg  = { .r = { .min = MIN_RXDELAY,
                                         .max = MAX_RXDELAY }}
                };

                if (num_RxIntDelay > bd) {
                        adapter->rx_int_delay = RxIntDelay[bd];
                        e1000_validate_option(&adapter->rx_int_delay, &opt,
                                              adapter);
                } else {
                        adapter->rx_int_delay = opt.def;
                }
        }
        { /* Receive Absolute Interrupt Delay */
                opt = (struct e1000_option) {
                        .type = range_option,
                        .name = "Receive Absolute Interrupt Delay",
                        .err  = "using default of " __MODULE_STRING(DEFAULT_RADV),
                        .def  = DEFAULT_RADV,
                        .arg  = { .r = { .min = MIN_RXABSDELAY,
                                         .max = MAX_RXABSDELAY }}
                };

                if (num_RxAbsIntDelay > bd) {
                        adapter->rx_abs_int_delay = RxAbsIntDelay[bd];
                        e1000_validate_option(&adapter->rx_abs_int_delay, &opt,
                                              adapter);
                } else {
                        adapter->rx_abs_int_delay = opt.def;
                }
        }
        { /* Interrupt Throttling Rate */
                opt = (struct e1000_option) {
                        .type = range_option,
                        .name = "Interrupt Throttling Rate (ints/sec)",
                        .err  = "using default of " __MODULE_STRING(DEFAULT_ITR),
                        .def  = DEFAULT_ITR,
                        .arg  = { .r = { .min = MIN_ITR,
                                         .max = MAX_ITR }}
                };

                if (num_InterruptThrottleRate > bd) {
                        adapter->itr = InterruptThrottleRate[bd];
                        switch (adapter->itr) {
                        case 0:
                                e_dev_info("%s turned off\n", opt.name);
                                break;
                        case 1:
                                e_dev_info("%s set to dynamic mode\n",
                                           opt.name);
                                adapter->itr_setting = adapter->itr;
                                adapter->itr = 20000;
                                break;
                        case 3:
                                e_dev_info("%s set to dynamic conservative "
                                           "mode\n", opt.name);
                                adapter->itr_setting = adapter->itr;
                                adapter->itr = 20000;
                                break;
                        case 4:
                                e_dev_info("%s set to simplified "
                                           "(2000-8000) ints mode\n", opt.name);
                                adapter->itr_setting = adapter->itr;
                                break;
                        default:
                                e1000_validate_option(&adapter->itr, &opt,
                                                      adapter);
                                /* save the setting, because the dynamic bits
                                 * change itr.
                                 * clear the lower two bits because they are
                                 * used as control
                                 */
                                adapter->itr_setting = adapter->itr & ~3;
                                break;
                        }
                } else {
                        adapter->itr_setting = opt.def;
                        adapter->itr = 20000;
                }
        }
        { /* Smart Power Down */
                opt = (struct e1000_option) {
                        .type = enable_option,
                        .name = "PHY Smart Power Down",
                        .err  = "defaulting to Disabled",
                        .def  = OPTION_DISABLED
                };

                if (num_SmartPowerDownEnable > bd) {
                        unsigned int spd = SmartPowerDownEnable[bd];
                        e1000_validate_option(&spd, &opt, adapter);
                        adapter->smart_power_down = spd;
                } else {
                        adapter->smart_power_down = opt.def;
                }
        }

        switch (adapter->hw.media_type) {
        case e1000_media_type_fiber:
        case e1000_media_type_internal_serdes:
                e1000_check_fiber_options(adapter);
                break;
        case e1000_media_type_copper:
                e1000_check_copper_options(adapter);
                break;
        default:
                BUG();
        }
}

/**
 * e1000_check_fiber_options - Range Checking for Link Options, Fiber Version
 * @adapter: board private structure
 *
 * Handles speed and duplex options on fiber adapters
 **/
static void e1000_check_fiber_options(struct e1000_adapter *adapter)
{
        int bd = adapter->bd_number;
        if (num_Speed > bd) {
                e_dev_info("Speed not valid for fiber adapters, parameter "
                           "ignored\n");
        }

        if (num_Duplex > bd) {
                e_dev_info("Duplex not valid for fiber adapters, parameter "
                           "ignored\n");
        }

        if ((num_AutoNeg > bd) && (AutoNeg[bd] != 0x20)) {
                e_dev_info("AutoNeg other than 1000/Full is not valid for fiber"
                           "adapters, parameter ignored\n");
        }
}

/**
 * e1000_check_copper_options - Range Checking for Link Options, Copper Version
 * @adapter: board private structure
 *
 * Handles speed and duplex options on copper adapters
 **/
static void e1000_check_copper_options(struct e1000_adapter *adapter)
{
        struct e1000_option opt;
        unsigned int speed, dplx, an;
        int bd = adapter->bd_number;

        { /* Speed */
                static const struct e1000_opt_list speed_list[] = {
                        {          0, "" },
                        {   SPEED_10, "" },
                        {  SPEED_100, "" },
                        { SPEED_1000, "" }};

                opt = (struct e1000_option) {
                        .type = list_option,
                        .name = "Speed",
                        .err  = "parameter ignored",
                        .def  = 0,
                        .arg  = { .l = { .nr = ARRAY_SIZE(speed_list),
                                         .p = speed_list }}
                };

                if (num_Speed > bd) {
                        speed = Speed[bd];
                        e1000_validate_option(&speed, &opt, adapter);
                } else {
                        speed = opt.def;
                }
        }
        { /* Duplex */
                static const struct e1000_opt_list dplx_list[] = {
                        {           0, "" },
                        { HALF_DUPLEX, "" },
                        { FULL_DUPLEX, "" }};

                opt = (struct e1000_option) {
                        .type = list_option,
                        .name = "Duplex",
                        .err  = "parameter ignored",
                        .def  = 0,
                        .arg  = { .l = { .nr = ARRAY_SIZE(dplx_list),
                                         .p = dplx_list }}
                };

                if (num_Duplex > bd) {
                        dplx = Duplex[bd];
                        e1000_validate_option(&dplx, &opt, adapter);
                } else {
                        dplx = opt.def;
                }
        }

        if ((num_AutoNeg > bd) && (speed != 0 || dplx != 0)) {
                e_dev_info("AutoNeg specified along with Speed or Duplex, "
                           "parameter ignored\n");
                adapter->hw.autoneg_advertised = AUTONEG_ADV_DEFAULT;
        } else { /* Autoneg */
                static const struct e1000_opt_list an_list[] =
                        #define AA "AutoNeg advertising "
                        {{ 0x01, AA "10/HD" },
                         { 0x02, AA "10/FD" },
                         { 0x03, AA "10/FD, 10/HD" },
                         { 0x04, AA "100/HD" },
                         { 0x05, AA "100/HD, 10/HD" },
                         { 0x06, AA "100/HD, 10/FD" },
                         { 0x07, AA "100/HD, 10/FD, 10/HD" },
                         { 0x08, AA "100/FD" },
                         { 0x09, AA "100/FD, 10/HD" },
                         { 0x0a, AA "100/FD, 10/FD" },
                         { 0x0b, AA "100/FD, 10/FD, 10/HD" },
                         { 0x0c, AA "100/FD, 100/HD" },
                         { 0x0d, AA "100/FD, 100/HD, 10/HD" },
                         { 0x0e, AA "100/FD, 100/HD, 10/FD" },
                         { 0x0f, AA "100/FD, 100/HD, 10/FD, 10/HD" },
                         { 0x20, AA "1000/FD" },
                         { 0x21, AA "1000/FD, 10/HD" },
                         { 0x22, AA "1000/FD, 10/FD" },
                         { 0x23, AA "1000/FD, 10/FD, 10/HD" },
                         { 0x24, AA "1000/FD, 100/HD" },
                         { 0x25, AA "1000/FD, 100/HD, 10/HD" },
                         { 0x26, AA "1000/FD, 100/HD, 10/FD" },
                         { 0x27, AA "1000/FD, 100/HD, 10/FD, 10/HD" },
                         { 0x28, AA "1000/FD, 100/FD" },
                         { 0x29, AA "1000/FD, 100/FD, 10/HD" },
                         { 0x2a, AA "1000/FD, 100/FD, 10/FD" },
                         { 0x2b, AA "1000/FD, 100/FD, 10/FD, 10/HD" },
                         { 0x2c, AA "1000/FD, 100/FD, 100/HD" },
                         { 0x2d, AA "1000/FD, 100/FD, 100/HD, 10/HD" },
                         { 0x2e, AA "1000/FD, 100/FD, 100/HD, 10/FD" },
                         { 0x2f, AA "1000/FD, 100/FD, 100/HD, 10/FD, 10/HD" }};

                opt = (struct e1000_option) {
                        .type = list_option,
                        .name = "AutoNeg",
                        .err  = "parameter ignored",
                        .def  = AUTONEG_ADV_DEFAULT,
                        .arg  = { .l = { .nr = ARRAY_SIZE(an_list),
                                         .p = an_list }}
                };

                if (num_AutoNeg > bd) {
                        an = AutoNeg[bd];
                        e1000_validate_option(&an, &opt, adapter);
                } else {
                        an = opt.def;
                }
                adapter->hw.autoneg_advertised = an;
        }

        switch (speed + dplx) {
        case 0:
                adapter->hw.autoneg = adapter->fc_autoneg = 1;
                if ((num_Speed > bd) && (speed != 0 || dplx != 0))
                        e_dev_info("Speed and duplex autonegotiation "
                                   "enabled\n");
                break;
        case HALF_DUPLEX:
                e_dev_info("Half Duplex specified without Speed\n");
                e_dev_info("Using Autonegotiation at Half Duplex only\n");
                adapter->hw.autoneg = adapter->fc_autoneg = 1;
                adapter->hw.autoneg_advertised = ADVERTISE_10_HALF |
                                                 ADVERTISE_100_HALF;
                break;
        case FULL_DUPLEX:
                e_dev_info("Full Duplex specified without Speed\n");
                e_dev_info("Using Autonegotiation at Full Duplex only\n");
                adapter->hw.autoneg = adapter->fc_autoneg = 1;
                adapter->hw.autoneg_advertised = ADVERTISE_10_FULL |
                                                 ADVERTISE_100_FULL |
                                                 ADVERTISE_1000_FULL;
                break;
        case SPEED_10:
                e_dev_info("10 Mbps Speed specified without Duplex\n");
                e_dev_info("Using Autonegotiation at 10 Mbps only\n");
                adapter->hw.autoneg = adapter->fc_autoneg = 1;
                adapter->hw.autoneg_advertised = ADVERTISE_10_HALF |
                                                 ADVERTISE_10_FULL;
                break;
        case SPEED_10 + HALF_DUPLEX:
                e_dev_info("Forcing to 10 Mbps Half Duplex\n");
                adapter->hw.autoneg = adapter->fc_autoneg = 0;
                adapter->hw.forced_speed_duplex = e1000_10_half;
                adapter->hw.autoneg_advertised = 0;
                break;
        case SPEED_10 + FULL_DUPLEX:
                e_dev_info("Forcing to 10 Mbps Full Duplex\n");
                adapter->hw.autoneg = adapter->fc_autoneg = 0;
                adapter->hw.forced_speed_duplex = e1000_10_full;
                adapter->hw.autoneg_advertised = 0;
                break;
        case SPEED_100:
                e_dev_info("100 Mbps Speed specified without Duplex\n");
                e_dev_info("Using Autonegotiation at 100 Mbps only\n");
                adapter->hw.autoneg = adapter->fc_autoneg = 1;
                adapter->hw.autoneg_advertised = ADVERTISE_100_HALF |
                                                 ADVERTISE_100_FULL;
                break;
        case SPEED_100 + HALF_DUPLEX:
                e_dev_info("Forcing to 100 Mbps Half Duplex\n");
                adapter->hw.autoneg = adapter->fc_autoneg = 0;
                adapter->hw.forced_speed_duplex = e1000_100_half;
                adapter->hw.autoneg_advertised = 0;
                break;
        case SPEED_100 + FULL_DUPLEX:
                e_dev_info("Forcing to 100 Mbps Full Duplex\n");
                adapter->hw.autoneg = adapter->fc_autoneg = 0;
                adapter->hw.forced_speed_duplex = e1000_100_full;
                adapter->hw.autoneg_advertised = 0;
                break;
        case SPEED_1000:
                e_dev_info("1000 Mbps Speed specified without Duplex\n");
                goto full_duplex_only;
        case SPEED_1000 + HALF_DUPLEX:
                e_dev_info("Half Duplex is not supported at 1000 Mbps\n");
                fallthrough;
        case SPEED_1000 + FULL_DUPLEX:
full_duplex_only:
                e_dev_info("Using Autonegotiation at 1000 Mbps Full Duplex "
                           "only\n");
                adapter->hw.autoneg = adapter->fc_autoneg = 1;
                adapter->hw.autoneg_advertised = ADVERTISE_1000_FULL;
                break;
        default:
                BUG();
        }

        /* Speed, AutoNeg and MDI/MDI-X must all play nice */
        if (e1000_validate_mdi_setting(&(adapter->hw)) < 0) {
                e_dev_info("Speed, AutoNeg and MDI-X specs are incompatible. "
                           "Setting MDI-X to a compatible value.\n");
        }
}