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

     2

     3

  Intel PRO/1000 Linux driver

     4

  Copyright(c) 1999 - 2012 Intel Corporation.

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  This program is free software; you can redistribute it and/or modify it

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  under the terms and conditions of the GNU General Public License,

     8

  version 2, as published by the Free Software Foundation.

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  This program is distributed in the hope it will be useful, but WITHOUT

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  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    12

  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for

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  more details.

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    15

  You should have received a copy of the GNU General Public License along with

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  this program; if not, write to the Free Software Foundation, Inc.,

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  51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.

    18

    19

  The full GNU General Public License is included in this distribution in

    20

  the file called "COPYING".

    21

    22

  Contact Information:

    23

  Linux NICS <linux.nics@intel.com>

    24

  e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>

    25

  Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497

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    27

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

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#include <linux/netdevice.h>

    30

#include <linux/module.h>

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#include <linux/pci.h>

    32

    33

#include "e1000.h"

    34

    35

/*

    36

 * This is the only thing that needs to be changed to adjust the

    37

 * maximum number of ports that the driver can manage.

    38

 */

    39

    40

#define E1000_MAX_NIC 32

    41

    42

#define OPTION_UNSET   -1

    43

#define OPTION_DISABLED 0

    44

#define OPTION_ENABLED  1

    45

    46

#define COPYBREAK_DEFAULT 256

    47

unsigned int copybreak = COPYBREAK_DEFAULT;

    48

module_param(copybreak, uint, 0644);

    49

MODULE_PARM_DESC(copybreak,

    50

	"Maximum size of packet that is copied to a new buffer on receive");

    51

    52

/*

    53

 * All parameters are treated the same, as an integer array of values.

    54

 * This macro just reduces the need to repeat the same declaration code

    55

 * over and over (plus this helps to avoid typo bugs).

    56

 */

    57

    58

#define E1000_PARAM_INIT { [0 ... E1000_MAX_NIC] = OPTION_UNSET }

    59

#define E1000_PARAM(X, desc)					\

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	static int __devinitdata X[E1000_MAX_NIC+1]		\

    61

		= E1000_PARAM_INIT;				\

    62

	static unsigned int num_##X;				\

    63

	module_param_array_named(X, X, int, &num_##X, 0);	\

    64

	MODULE_PARM_DESC(X, desc);

    65

    66

/*

    67

 * Transmit Interrupt Delay in units of 1.024 microseconds

    68

 * Tx interrupt delay needs to typically be set to something non-zero

    69

 *

    70

 * Valid Range: 0-65535

    71

 */

    72

E1000_PARAM(TxIntDelay, "Transmit Interrupt Delay");

    73

#define DEFAULT_TIDV 8

    74

#define MAX_TXDELAY 0xFFFF

    75

#define MIN_TXDELAY 0

    76

    77

/*

    78

 * Transmit Absolute Interrupt Delay in units of 1.024 microseconds

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 *

    80

 * Valid Range: 0-65535

    81

 */

    82

E1000_PARAM(TxAbsIntDelay, "Transmit Absolute Interrupt Delay");

    83

#define DEFAULT_TADV 32

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#define MAX_TXABSDELAY 0xFFFF

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#define MIN_TXABSDELAY 0

    86

    87

/*

    88

 * Receive Interrupt Delay in units of 1.024 microseconds

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 * hardware will likely hang if you set this to anything but zero.

    90

 *

    91

 * Valid Range: 0-65535

    92

 */

    93

E1000_PARAM(RxIntDelay, "Receive Interrupt Delay");

    94

#define MAX_RXDELAY 0xFFFF

    95

#define MIN_RXDELAY 0

    96

    97

/*

    98

 * Receive Absolute Interrupt Delay in units of 1.024 microseconds

    99

 *

   100

 * Valid Range: 0-65535

   101

 */

   102

E1000_PARAM(RxAbsIntDelay, "Receive Absolute Interrupt Delay");

   103

#define MAX_RXABSDELAY 0xFFFF

   104

#define MIN_RXABSDELAY 0

   105

   106

/*

   107

 * Interrupt Throttle Rate (interrupts/sec)

   108

 *

   109

 * Valid Range: 100-100000 or one of: 0=off, 1=dynamic, 3=dynamic conservative

   110

 */

   111

E1000_PARAM(InterruptThrottleRate, "Interrupt Throttling Rate");

   112

#define DEFAULT_ITR 3

   113

#define MAX_ITR 100000

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#define MIN_ITR 100

   115

   116

/*

   117

 * IntMode (Interrupt Mode)

   118

 *

   119

 * Valid Range: varies depending on kernel configuration & hardware support

   120

 *

   121

 * legacy=0, MSI=1, MSI-X=2

   122

 *

   123

 * When MSI/MSI-X support is enabled in kernel-

   124

 *   Default Value: 2 (MSI-X) when supported by hardware, 1 (MSI) otherwise

   125

 * When MSI/MSI-X support is not enabled in kernel-

   126

 *   Default Value: 0 (legacy)

   127

 *

   128

 * When a mode is specified that is not allowed/supported, it will be

   129

 * demoted to the most advanced interrupt mode available.

   130

 */

   131

E1000_PARAM(IntMode, "Interrupt Mode");

   132

#define MAX_INTMODE	2

   133

#define MIN_INTMODE	0

   134

   135

/*

   136

 * Enable Smart Power Down of the PHY

   137

 *

   138

 * Valid Range: 0, 1

   139

 *

   140

 * Default Value: 0 (disabled)

   141

 */

   142

E1000_PARAM(SmartPowerDownEnable, "Enable PHY smart power down");

   143

   144

/*

   145

 * Enable Kumeran Lock Loss workaround

   146

 *

   147

 * Valid Range: 0, 1

   148

 *

   149

 * Default Value: 1 (enabled)

   150

 */

   151

E1000_PARAM(KumeranLockLoss, "Enable Kumeran lock loss workaround");

   152

   153

/*

   154

 * Write Protect NVM

   155

 *

   156

 * Valid Range: 0, 1

   157

 *

   158

 * Default Value: 1 (enabled)

   159

 */

   160

E1000_PARAM(WriteProtectNVM, "Write-protect NVM [WARNING: disabling this can lead to corrupted NVM]");

   161

   162

/*

   163

 * Enable CRC Stripping

   164

 *

   165

 * Valid Range: 0, 1

   166

 *

   167

 * Default Value: 1 (enabled)

   168

 */

   169

E1000_PARAM(CrcStripping, "Enable CRC Stripping, disable if your BMC needs " \

   170

                          "the CRC");

   171

   172

struct e1000_option {

   173

	enum { enable_option, range_option, list_option } type;

   174

	const char *name;

   175

	const char *err;

   176

	int def;

   177

	union {

   178

		struct { /* range_option info */

   179

			int min;

   180

			int max;

   181

		} r;

   182

		struct { /* list_option info */

   183

			int nr;

   184

			struct e1000_opt_list { int i; char *str; } *p;

   185

		} l;

   186

	} arg;

   187

};

   188

   189

static int __devinit e1000_validate_option(unsigned int *value,

   190

					   const struct e1000_option *opt,

   191

					   struct e1000_adapter *adapter)

   192

{

   193

	if (*value == OPTION_UNSET) {

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		*value = opt->def;

   195

		return 0;

   196

	}

   197

   198

	switch (opt->type) {

   199

	case enable_option:

   200

		switch (*value) {

   201

		case OPTION_ENABLED:

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			e_info("%s Enabled\n", opt->name);

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			return 0;

   204

		case OPTION_DISABLED:

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			e_info("%s Disabled\n", opt->name);

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			return 0;

   207

		}

   208

		break;

   209

	case range_option:

   210

		if (*value >= opt->arg.r.min && *value <= opt->arg.r.max) {

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			e_info("%s set to %i\n", opt->name, *value);

   212

			return 0;

   213

		}

   214

		break;

   215

	case list_option: {

   216

		int i;

   217

		struct e1000_opt_list *ent;

   218

   219

		for (i = 0; i < opt->arg.l.nr; i++) {

   220

			ent = &opt->arg.l.p[i];

   221

			if (*value == ent->i) {

   222

				if (ent->str[0] != '\0')

   223

					e_info("%s\n", ent->str);

   224

				return 0;

   225

			}

   226

		}

   227

	}

   228

		break;

   229

	default:

   230

		BUG();

   231

	}

   232

   233

	e_info("Invalid %s value specified (%i) %s\n", opt->name, *value,

   234

	       opt->err);

   235

	*value = opt->def;

   236

	return -1;

   237

}

   238

   239

/**

   240

 * e1000e_check_options - Range Checking for Command Line Parameters

   241

 * @adapter: board private structure

   242

 *

   243

 * This routine checks all command line parameters for valid user

   244

 * input.  If an invalid value is given, or if no user specified

   245

 * value exists, a default value is used.  The final value is stored

   246

 * in a variable in the adapter structure.

   247

 **/

   248

void __devinit e1000e_check_options(struct e1000_adapter *adapter)

   249

{

   250

	struct e1000_hw *hw = &adapter->hw;

   251

	int bd = adapter->bd_number;

   252

   253

	if (bd >= E1000_MAX_NIC) {

   254

		e_notice("Warning: no configuration for board #%i\n", bd);

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		e_notice("Using defaults for all values\n");

   256

	}

   257

   258

	{ /* Transmit Interrupt Delay */

   259

		static const struct e1000_option opt = {

   260

			.type = range_option,

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			.name = "Transmit Interrupt Delay",

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			.err  = "using default of "

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				__MODULE_STRING(DEFAULT_TIDV),

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			.def  = DEFAULT_TIDV,

   265

			.arg  = { .r = { .min = MIN_TXDELAY,

   266

					 .max = MAX_TXDELAY } }

   267

		};

   268

   269

		if (num_TxIntDelay > bd) {

   270

			adapter->tx_int_delay = TxIntDelay[bd];

   271

			e1000_validate_option(&adapter->tx_int_delay, &opt,

   272

					      adapter);

   273

		} else {

   274

			adapter->tx_int_delay = opt.def;

   275

		}

   276

	}

   277

	{ /* Transmit Absolute Interrupt Delay */

   278

		static const struct e1000_option opt = {

   279

			.type = range_option,

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			.name = "Transmit Absolute Interrupt Delay",

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			.err  = "using default of "

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				__MODULE_STRING(DEFAULT_TADV),

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			.def  = DEFAULT_TADV,

   284

			.arg  = { .r = { .min = MIN_TXABSDELAY,

   285

					 .max = MAX_TXABSDELAY } }

   286

		};

   287

   288

		if (num_TxAbsIntDelay > bd) {

   289

			adapter->tx_abs_int_delay = TxAbsIntDelay[bd];

   290

			e1000_validate_option(&adapter->tx_abs_int_delay, &opt,

   291

					      adapter);

   292

		} else {

   293

			adapter->tx_abs_int_delay = opt.def;

   294

		}

   295

	}

   296

	{ /* Receive Interrupt Delay */

   297

		static struct e1000_option opt = {

   298

			.type = range_option,

   299

			.name = "Receive Interrupt Delay",

   300

			.err  = "using default of "

   301

				__MODULE_STRING(DEFAULT_RDTR),

   302

			.def  = DEFAULT_RDTR,

   303

			.arg  = { .r = { .min = MIN_RXDELAY,

   304

					 .max = MAX_RXDELAY } }

   305

		};

   306

   307

		if (num_RxIntDelay > bd) {

   308

			adapter->rx_int_delay = RxIntDelay[bd];

   309

			e1000_validate_option(&adapter->rx_int_delay, &opt,

   310

					      adapter);

   311

		} else {

   312

			adapter->rx_int_delay = opt.def;

   313

		}

   314

	}

   315

	{ /* Receive Absolute Interrupt Delay */

   316

		static const struct e1000_option opt = {

   317

			.type = range_option,

   318

			.name = "Receive Absolute Interrupt Delay",

   319

			.err  = "using default of "

   320

				__MODULE_STRING(DEFAULT_RADV),

   321

			.def  = DEFAULT_RADV,

   322

			.arg  = { .r = { .min = MIN_RXABSDELAY,

   323

					 .max = MAX_RXABSDELAY } }

   324

		};

   325

   326

		if (num_RxAbsIntDelay > bd) {

   327

			adapter->rx_abs_int_delay = RxAbsIntDelay[bd];

   328

			e1000_validate_option(&adapter->rx_abs_int_delay, &opt,

   329

					      adapter);

   330

		} else {

   331

			adapter->rx_abs_int_delay = opt.def;

   332

		}

   333

	}

   334

	{ /* Interrupt Throttling Rate */

   335

		static const struct e1000_option opt = {

   336

			.type = range_option,

   337

			.name = "Interrupt Throttling Rate (ints/sec)",

   338

			.err  = "using default of "

   339

				__MODULE_STRING(DEFAULT_ITR),

   340

			.def  = DEFAULT_ITR,

   341

			.arg  = { .r = { .min = MIN_ITR,

   342

					 .max = MAX_ITR } }

   343

		};

   344

   345

		if (num_InterruptThrottleRate > bd) {

   346

			adapter->itr = InterruptThrottleRate[bd];

   347

   348

			/*

   349

			 * Make sure a message is printed for non-special

   350

			 * values.  And in case of an invalid option, display

   351

			 * warning, use default and got through itr/itr_setting

   352

			 * adjustment logic below

   353

			 */

   354

			if ((adapter->itr > 4) &&

   355

			    e1000_validate_option(&adapter->itr, &opt, adapter))

   356

				adapter->itr = opt.def;

   357

		} else {

   358

			/*

   359

			 * If no option specified, use default value and go

   360

			 * through the logic below to adjust itr/itr_setting

   361

			 */

   362

			adapter->itr = opt.def;

   363

   364

			/*

   365

			 * Make sure a message is printed for non-special

   366

			 * default values

   367

			 */

   368

			if (adapter->itr > 40)

   369

				e_info("%s set to default %d\n", opt.name,

   370

				       adapter->itr);

   371

		}

   372

   373

		adapter->itr_setting = adapter->itr;

   374

		switch (adapter->itr) {

   375

		case 0:

   376

			e_info("%s turned off\n", opt.name);

   377

			break;

   378

		case 1:

   379

			e_info("%s set to dynamic mode\n", opt.name);

   380

			adapter->itr = 20000;

   381

			break;

   382

		case 3:

   383

			e_info("%s set to dynamic conservative mode\n",

   384

			       opt.name);

   385

			adapter->itr = 20000;

   386

			break;

   387

		case 4:

   388

			e_info("%s set to simplified (2000-8000 ints) mode\n",

   389

			       opt.name);

   390

			break;

   391

		default:

   392

			/*

   393

			 * Save the setting, because the dynamic bits

   394

			 * change itr.

   395

			 *

   396

			 * Clear the lower two bits because

   397

			 * they are used as control.

   398

			 */

   399

			adapter->itr_setting &= ~3;

   400

			break;

   401

		}

   402

	}

   403

	{ /* Interrupt Mode */

   404

		static struct e1000_option opt = {

   405

			.type = range_option,

   406

			.name = "Interrupt Mode",

   407

#ifndef CONFIG_PCI_MSI

   408

			.err  = "defaulting to 0 (legacy)",

   409

			.def  = E1000E_INT_MODE_LEGACY,

   410

			.arg  = { .r = { .min = 0,

   411

					 .max = 0 } }

   412

#endif

   413

		};

   414

   415

#ifdef CONFIG_PCI_MSI

   416

		if (adapter->flags & FLAG_HAS_MSIX) {

   417

			opt.err = kstrdup("defaulting to 2 (MSI-X)",

   418

					  GFP_KERNEL);

   419

			opt.def = E1000E_INT_MODE_MSIX;

   420

			opt.arg.r.max = E1000E_INT_MODE_MSIX;

   421

		} else {

   422

			opt.err = kstrdup("defaulting to 1 (MSI)", GFP_KERNEL);

   423

			opt.def = E1000E_INT_MODE_MSI;

   424

			opt.arg.r.max = E1000E_INT_MODE_MSI;

   425

		}

   426

   427

		if (!opt.err) {

   428

			dev_err(&adapter->pdev->dev,

   429

				"Failed to allocate memory\n");

   430

			return;

   431

		}

   432

#endif

   433

   434

		if (num_IntMode > bd) {

   435

			unsigned int int_mode = IntMode[bd];

   436

			e1000_validate_option(&int_mode, &opt, adapter);

   437

			adapter->int_mode = int_mode;

   438

		} else {

   439

			adapter->int_mode = opt.def;

   440

		}

   441

   442

#ifdef CONFIG_PCI_MSI

   443

		kfree(opt.err);

   444

#endif

   445

	}

   446

	{ /* Smart Power Down */

   447

		static const struct e1000_option opt = {

   448

			.type = enable_option,

   449

			.name = "PHY Smart Power Down",

   450

			.err  = "defaulting to Disabled",

   451

			.def  = OPTION_DISABLED

   452

		};

   453

   454

		if (num_SmartPowerDownEnable > bd) {

   455

			unsigned int spd = SmartPowerDownEnable[bd];

   456

			e1000_validate_option(&spd, &opt, adapter);

   457

			if ((adapter->flags & FLAG_HAS_SMART_POWER_DOWN)

   458

			    && spd)

   459

				adapter->flags |= FLAG_SMART_POWER_DOWN;

   460

		}

   461

	}

   462

	{ /* CRC Stripping */

   463

		static const struct e1000_option opt = {

   464

			.type = enable_option,

   465

			.name = "CRC Stripping",

   466

			.err  = "defaulting to Enabled",

   467

			.def  = OPTION_ENABLED

   468

		};

   469

   470

		if (num_CrcStripping > bd) {

   471

			unsigned int crc_stripping = CrcStripping[bd];

   472

			e1000_validate_option(&crc_stripping, &opt, adapter);

   473

			if (crc_stripping == OPTION_ENABLED) {

   474

				adapter->flags2 |= FLAG2_CRC_STRIPPING;

   475

				adapter->flags2 |= FLAG2_DFLT_CRC_STRIPPING;

   476

			}

   477

		} else {

   478

			adapter->flags2 |= FLAG2_CRC_STRIPPING;

   479

			adapter->flags2 |= FLAG2_DFLT_CRC_STRIPPING;

   480

		}

   481

	}

   482

	{ /* Kumeran Lock Loss Workaround */

   483

		static const struct e1000_option opt = {

   484

			.type = enable_option,

   485

			.name = "Kumeran Lock Loss Workaround",

   486

			.err  = "defaulting to Enabled",

   487

			.def  = OPTION_ENABLED

   488

		};

   489

   490

		if (num_KumeranLockLoss > bd) {

   491

			unsigned int kmrn_lock_loss = KumeranLockLoss[bd];

   492

			e1000_validate_option(&kmrn_lock_loss, &opt, adapter);

   493

			if (hw->mac.type == e1000_ich8lan)

   494

				e1000e_set_kmrn_lock_loss_workaround_ich8lan(hw,

   495

								kmrn_lock_loss);

   496

		} else {

   497

			if (hw->mac.type == e1000_ich8lan)

   498

				e1000e_set_kmrn_lock_loss_workaround_ich8lan(hw,

   499

								       opt.def);

   500

		}

   501

	}

   502

	{ /* Write-protect NVM */

   503

		static const struct e1000_option opt = {

   504

			.type = enable_option,

   505

			.name = "Write-protect NVM",

   506

			.err  = "defaulting to Enabled",

   507

			.def  = OPTION_ENABLED

   508

		};

   509

   510

		if (adapter->flags & FLAG_IS_ICH) {

   511

			if (num_WriteProtectNVM > bd) {

   512

				unsigned int write_protect_nvm = WriteProtectNVM[bd];

   513

				e1000_validate_option(&write_protect_nvm, &opt,

   514

						      adapter);

   515

				if (write_protect_nvm)

   516

					adapter->flags |= FLAG_READ_ONLY_NVM;

   517

			} else {

   518

				if (opt.def)

   519

					adapter->flags |= FLAG_READ_ONLY_NVM;

   520

			}

   521

		}

   522

	}

   523

}