linux_kernel/drivers/net/ethernet/intel/e1000/e1000_param.c

// SPDX-License-Identifier: GPL-2.0
/*******************************************************************************

  Intel PRO/1000 Linux driver
  Copyright(c) 1999 - 2006 Intel Corporation.

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

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

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

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

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

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

#include "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
#define AUTONEG_ADV_MASK     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");
#define FLOW_CONTROL_DEFAULT FLOW_CONTROL_FULL

/* 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");
		/* fall through */
	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");
	}
}