summaryrefslogtreecommitdiff
path: root/drivers/net/ethernet/intel/e1000e/param.c
blob: aa1923f7ebdd2e56dd0ebd436feb69164426ad7c (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
/* Intel PRO/1000 Linux driver
 * Copyright(c) 1999 - 2014 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
 */

#include <linux/netdevice.h>
#include <linux/module.h>
#include <linux/pci.h>

#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

#define COPYBREAK_DEFAULT 256
unsigned int copybreak = COPYBREAK_DEFAULT;
module_param(copybreak, uint, 0644);
MODULE_PARM_DESC(copybreak,
		 "Maximum size of packet that is copied to a new buffer on receive");

/* 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 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 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 MAX_RXABSDELAY 0xFFFF
#define MIN_RXABSDELAY 0

/* Interrupt Throttle Rate (interrupts/sec)
 *
 * Valid Range: 100-100000 or one of: 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

/* IntMode (Interrupt Mode)
 *
 * Valid Range: varies depending on kernel configuration & hardware support
 *
 * legacy=0, MSI=1, MSI-X=2
 *
 * When MSI/MSI-X support is enabled in kernel-
 *   Default Value: 2 (MSI-X) when supported by hardware, 1 (MSI) otherwise
 * When MSI/MSI-X support is not enabled in kernel-
 *   Default Value: 0 (legacy)
 *
 * When a mode is specified that is not allowed/supported, it will be
 * demoted to the most advanced interrupt mode available.
 */
E1000_PARAM(IntMode, "Interrupt Mode");
#define MAX_INTMODE	2
#define MIN_INTMODE	0

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

/* Enable Kumeran Lock Loss workaround
 *
 * Valid Range: 0, 1
 *
 * Default Value: 1 (enabled)
 */
E1000_PARAM(KumeranLockLoss, "Enable Kumeran lock loss workaround");

/* Write Protect NVM
 *
 * Valid Range: 0, 1
 *
 * Default Value: 1 (enabled)
 */
E1000_PARAM(WriteProtectNVM,
	    "Write-protect NVM [WARNING: disabling this can lead to corrupted NVM]");

/* Enable CRC Stripping
 *
 * Valid Range: 0, 1
 *
 * Default Value: 1 (enabled)
 */
E1000_PARAM(CrcStripping,
	    "Enable CRC Stripping, disable if your BMC needs the CRC");

struct e1000_option {
	enum { enable_option, range_option, list_option } type;
	const char *name;
	const char *err;
	int def;
	union {
		/* range_option info */
		struct {
			int min;
			int max;
		} r;
		/* list_option info */
		struct {
			int nr;
			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:
			dev_info(&adapter->pdev->dev, "%s Enabled\n",
				 opt->name);
			return 0;
		case OPTION_DISABLED:
			dev_info(&adapter->pdev->dev, "%s Disabled\n",
				 opt->name);
			return 0;
		}
		break;
	case range_option:
		if (*value >= opt->arg.r.min && *value <= opt->arg.r.max) {
			dev_info(&adapter->pdev->dev, "%s set to %i\n",
				 opt->name, *value);
			return 0;
		}
		break;
	case list_option: {
		int i;
		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')
					dev_info(&adapter->pdev->dev, "%s\n",
						 ent->str);
				return 0;
			}
		}
	}
		break;
	default:
		BUG();
	}

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

/**
 * e1000e_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 e1000e_check_options(struct e1000_adapter *adapter)
{
	struct e1000_hw *hw = &adapter->hw;
	int bd = adapter->bd_number;

	if (bd >= E1000_MAX_NIC) {
		dev_notice(&adapter->pdev->dev,
			   "Warning: no configuration for board #%i\n", bd);
		dev_notice(&adapter->pdev->dev,
			   "Using defaults for all values\n");
	}

	/* Transmit Interrupt Delay */
	{
		static const struct e1000_option opt = {
			.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 */
	{
		static const struct e1000_option opt = {
			.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 */
	{
		static struct e1000_option opt = {
			.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 */
	{
		static const struct e1000_option opt = {
			.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 */
	{
		static const struct e1000_option opt = {
			.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];

			/* Make sure a message is printed for non-special
			 * values. And in case of an invalid option, display
			 * warning, use default and go through itr/itr_setting
			 * adjustment logic below
			 */
			if ((adapter->itr > 4) &&
			    e1000_validate_option(&adapter->itr, &opt, adapter))
				adapter->itr = opt.def;
		} else {
			/* If no option specified, use default value and go
			 * through the logic below to adjust itr/itr_setting
			 */
			adapter->itr = opt.def;

			/* Make sure a message is printed for non-special
			 * default values
			 */
			if (adapter->itr > 4)
				dev_info(&adapter->pdev->dev,
					 "%s set to default %d\n", opt.name,
					 adapter->itr);
		}

		adapter->itr_setting = adapter->itr;
		switch (adapter->itr) {
		case 0:
			dev_info(&adapter->pdev->dev, "%s turned off\n",
				 opt.name);
			break;
		case 1:
			dev_info(&adapter->pdev->dev,
				 "%s set to dynamic mode\n", opt.name);
			adapter->itr = 20000;
			break;
		case 2:
			dev_info(&adapter->pdev->dev,
				 "%s Invalid mode - setting default\n",
				 opt.name);
			adapter->itr_setting = opt.def;
			/* fall-through */
		case 3:
			dev_info(&adapter->pdev->dev,
				 "%s set to dynamic conservative mode\n",
				 opt.name);
			adapter->itr = 20000;
			break;
		case 4:
			dev_info(&adapter->pdev->dev,
				 "%s set to simplified (2000-8000 ints) mode\n",
				 opt.name);
			break;
		default:
			/* Save the setting, because the dynamic bits
			 * change itr.
			 *
			 * Clear the lower two bits because
			 * they are used as control.
			 */
			adapter->itr_setting &= ~3;
			break;
		}
	}
	/* Interrupt Mode */
	{
		static struct e1000_option opt = {
			.type = range_option,
			.name = "Interrupt Mode",
#ifndef CONFIG_PCI_MSI
			.err  = "defaulting to 0 (legacy)",
			.def  = E1000E_INT_MODE_LEGACY,
			.arg  = { .r = { .min = 0,
					 .max = 0 } }
#endif
		};

#ifdef CONFIG_PCI_MSI
		if (adapter->flags & FLAG_HAS_MSIX) {
			opt.err = kstrdup("defaulting to 2 (MSI-X)",
					  GFP_KERNEL);
			opt.def = E1000E_INT_MODE_MSIX;
			opt.arg.r.max = E1000E_INT_MODE_MSIX;
		} else {
			opt.err = kstrdup("defaulting to 1 (MSI)", GFP_KERNEL);
			opt.def = E1000E_INT_MODE_MSI;
			opt.arg.r.max = E1000E_INT_MODE_MSI;
		}

		if (!opt.err) {
			dev_err(&adapter->pdev->dev,
				"Failed to allocate memory\n");
			return;
		}
#endif

		if (num_IntMode > bd) {
			unsigned int int_mode = IntMode[bd];

			e1000_validate_option(&int_mode, &opt, adapter);
			adapter->int_mode = int_mode;
		} else {
			adapter->int_mode = opt.def;
		}

#ifdef CONFIG_PCI_MSI
		kfree(opt.err);
#endif
	}
	/* Smart Power Down */
	{
		static const struct e1000_option opt = {
			.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);
			if ((adapter->flags & FLAG_HAS_SMART_POWER_DOWN) && spd)
				adapter->flags |= FLAG_SMART_POWER_DOWN;
		}
	}
	/* CRC Stripping */
	{
		static const struct e1000_option opt = {
			.type = enable_option,
			.name = "CRC Stripping",
			.err  = "defaulting to Enabled",
			.def  = OPTION_ENABLED
		};

		if (num_CrcStripping > bd) {
			unsigned int crc_stripping = CrcStripping[bd];

			e1000_validate_option(&crc_stripping, &opt, adapter);
			if (crc_stripping == OPTION_ENABLED) {
				adapter->flags2 |= FLAG2_CRC_STRIPPING;
				adapter->flags2 |= FLAG2_DFLT_CRC_STRIPPING;
			}
		} else {
			adapter->flags2 |= FLAG2_CRC_STRIPPING;
			adapter->flags2 |= FLAG2_DFLT_CRC_STRIPPING;
		}
	}
	/* Kumeran Lock Loss Workaround */
	{
		static const struct e1000_option opt = {
			.type = enable_option,
			.name = "Kumeran Lock Loss Workaround",
			.err  = "defaulting to Enabled",
			.def  = OPTION_ENABLED
		};
		bool enabled = opt.def;

		if (num_KumeranLockLoss > bd) {
			unsigned int kmrn_lock_loss = KumeranLockLoss[bd];

			e1000_validate_option(&kmrn_lock_loss, &opt, adapter);
			enabled = kmrn_lock_loss;
		}

		if (hw->mac.type == e1000_ich8lan)
			e1000e_set_kmrn_lock_loss_workaround_ich8lan(hw,
								     enabled);
	}
	/* Write-protect NVM */
	{
		static const struct e1000_option opt = {
			.type = enable_option,
			.name = "Write-protect NVM",
			.err  = "defaulting to Enabled",
			.def  = OPTION_ENABLED
		};

		if (adapter->flags & FLAG_IS_ICH) {
			if (num_WriteProtectNVM > bd) {
				unsigned int write_protect_nvm =
				    WriteProtectNVM[bd];
				e1000_validate_option(&write_protect_nvm, &opt,
						      adapter);
				if (write_protect_nvm)
					adapter->flags |= FLAG_READ_ONLY_NVM;
			} else {
				if (opt.def)
					adapter->flags |= FLAG_READ_ONLY_NVM;
			}
		}
	}
}