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1// SPDX-License-Identifier: GPL-2.0
2/* Copyright(c) 1999 - 2018 Intel Corporation. */
3
4#include <linux/netdevice.h>
5#include <linux/module.h>
6#include <linux/pci.h>
7
8#include "e1000.h"
9
10/* This is the only thing that needs to be changed to adjust the
11 * maximum number of ports that the driver can manage.
12 */
13#define E1000_MAX_NIC 32
14
15#define OPTION_UNSET -1
16#define OPTION_DISABLED 0
17#define OPTION_ENABLED 1
18
19#define COPYBREAK_DEFAULT 256
20unsigned int copybreak = COPYBREAK_DEFAULT;
21module_param(copybreak, uint, 0644);
22MODULE_PARM_DESC(copybreak,
23 "Maximum size of packet that is copied to a new buffer on receive");
24
25/* All parameters are treated the same, as an integer array of values.
26 * This macro just reduces the need to repeat the same declaration code
27 * over and over (plus this helps to avoid typo bugs).
28 */
29#define E1000_PARAM_INIT { [0 ... E1000_MAX_NIC] = OPTION_UNSET }
30#define E1000_PARAM(X, desc) \
31 static int X[E1000_MAX_NIC+1] = E1000_PARAM_INIT; \
32 static unsigned int num_##X; \
33 module_param_array_named(X, X, int, &num_##X, 0); \
34 MODULE_PARM_DESC(X, desc);
35
36/* Transmit Interrupt Delay in units of 1.024 microseconds
37 * Tx interrupt delay needs to typically be set to something non-zero
38 *
39 * Valid Range: 0-65535
40 */
41E1000_PARAM(TxIntDelay, "Transmit Interrupt Delay");
42#define DEFAULT_TIDV 8
43#define MAX_TXDELAY 0xFFFF
44#define MIN_TXDELAY 0
45
46/* Transmit Absolute Interrupt Delay in units of 1.024 microseconds
47 *
48 * Valid Range: 0-65535
49 */
50E1000_PARAM(TxAbsIntDelay, "Transmit Absolute Interrupt Delay");
51#define DEFAULT_TADV 32
52#define MAX_TXABSDELAY 0xFFFF
53#define MIN_TXABSDELAY 0
54
55/* Receive Interrupt Delay in units of 1.024 microseconds
56 * hardware will likely hang if you set this to anything but zero.
57 *
58 * Burst variant is used as default if device has FLAG2_DMA_BURST.
59 *
60 * Valid Range: 0-65535
61 */
62E1000_PARAM(RxIntDelay, "Receive Interrupt Delay");
63#define DEFAULT_RDTR 0
64#define BURST_RDTR 0x20
65#define MAX_RXDELAY 0xFFFF
66#define MIN_RXDELAY 0
67
68/* Receive Absolute Interrupt Delay in units of 1.024 microseconds
69 *
70 * Burst variant is used as default if device has FLAG2_DMA_BURST.
71 *
72 * Valid Range: 0-65535
73 */
74E1000_PARAM(RxAbsIntDelay, "Receive Absolute Interrupt Delay");
75#define DEFAULT_RADV 8
76#define BURST_RADV 0x20
77#define MAX_RXABSDELAY 0xFFFF
78#define MIN_RXABSDELAY 0
79
80/* Interrupt Throttle Rate (interrupts/sec)
81 *
82 * Valid Range: 100-100000 or one of: 0=off, 1=dynamic, 3=dynamic conservative
83 */
84E1000_PARAM(InterruptThrottleRate, "Interrupt Throttling Rate");
85#define DEFAULT_ITR 3
86#define MAX_ITR 100000
87#define MIN_ITR 100
88
89/* IntMode (Interrupt Mode)
90 *
91 * Valid Range: varies depending on kernel configuration & hardware support
92 *
93 * legacy=0, MSI=1, MSI-X=2
94 *
95 * When MSI/MSI-X support is enabled in kernel-
96 * Default Value: 2 (MSI-X) when supported by hardware, 1 (MSI) otherwise
97 * When MSI/MSI-X support is not enabled in kernel-
98 * Default Value: 0 (legacy)
99 *
100 * When a mode is specified that is not allowed/supported, it will be
101 * demoted to the most advanced interrupt mode available.
102 */
103E1000_PARAM(IntMode, "Interrupt Mode");
104#define MAX_INTMODE 2
105#define MIN_INTMODE 0
106
107/* Enable Smart Power Down of the PHY
108 *
109 * Valid Range: 0, 1
110 *
111 * Default Value: 0 (disabled)
112 */
113E1000_PARAM(SmartPowerDownEnable, "Enable PHY smart power down");
114
115/* Enable Kumeran Lock Loss workaround
116 *
117 * Valid Range: 0, 1
118 *
119 * Default Value: 1 (enabled)
120 */
121E1000_PARAM(KumeranLockLoss, "Enable Kumeran lock loss workaround");
122
123/* Write Protect NVM
124 *
125 * Valid Range: 0, 1
126 *
127 * Default Value: 1 (enabled)
128 */
129E1000_PARAM(WriteProtectNVM,
130 "Write-protect NVM [WARNING: disabling this can lead to corrupted NVM]");
131
132/* Enable CRC Stripping
133 *
134 * Valid Range: 0, 1
135 *
136 * Default Value: 1 (enabled)
137 */
138E1000_PARAM(CrcStripping,
139 "Enable CRC Stripping, disable if your BMC needs the CRC");
140
141struct e1000_option {
142 enum { enable_option, range_option, list_option } type;
143 const char *name;
144 const char *err;
145 int def;
146 union {
147 /* range_option info */
148 struct {
149 int min;
150 int max;
151 } r;
152 /* list_option info */
153 struct {
154 int nr;
155 struct e1000_opt_list {
156 int i;
157 char *str;
158 } *p;
159 } l;
160 } arg;
161};
162
163static int e1000_validate_option(unsigned int *value,
164 const struct e1000_option *opt,
165 struct e1000_adapter *adapter)
166{
167 if (*value == OPTION_UNSET) {
168 *value = opt->def;
169 return 0;
170 }
171
172 switch (opt->type) {
173 case enable_option:
174 switch (*value) {
175 case OPTION_ENABLED:
176 dev_info(&adapter->pdev->dev, "%s Enabled\n",
177 opt->name);
178 return 0;
179 case OPTION_DISABLED:
180 dev_info(&adapter->pdev->dev, "%s Disabled\n",
181 opt->name);
182 return 0;
183 }
184 break;
185 case range_option:
186 if (*value >= opt->arg.r.min && *value <= opt->arg.r.max) {
187 dev_info(&adapter->pdev->dev, "%s set to %i\n",
188 opt->name, *value);
189 return 0;
190 }
191 break;
192 case list_option: {
193 int i;
194 struct e1000_opt_list *ent;
195
196 for (i = 0; i < opt->arg.l.nr; i++) {
197 ent = &opt->arg.l.p[i];
198 if (*value == ent->i) {
199 if (ent->str[0] != '\0')
200 dev_info(&adapter->pdev->dev, "%s\n",
201 ent->str);
202 return 0;
203 }
204 }
205 }
206 break;
207 default:
208 BUG();
209 }
210
211 dev_info(&adapter->pdev->dev, "Invalid %s value specified (%i) %s\n",
212 opt->name, *value, opt->err);
213 *value = opt->def;
214 return -1;
215}
216
217/**
218 * e1000e_check_options - Range Checking for Command Line Parameters
219 * @adapter: board private structure
220 *
221 * This routine checks all command line parameters for valid user
222 * input. If an invalid value is given, or if no user specified
223 * value exists, a default value is used. The final value is stored
224 * in a variable in the adapter structure.
225 **/
226void e1000e_check_options(struct e1000_adapter *adapter)
227{
228 struct e1000_hw *hw = &adapter->hw;
229 int bd = adapter->bd_number;
230
231 if (bd >= E1000_MAX_NIC) {
232 dev_notice(&adapter->pdev->dev,
233 "Warning: no configuration for board #%i\n", bd);
234 dev_notice(&adapter->pdev->dev,
235 "Using defaults for all values\n");
236 }
237
238 /* Transmit Interrupt Delay */
239 {
240 static const struct e1000_option opt = {
241 .type = range_option,
242 .name = "Transmit Interrupt Delay",
243 .err = "using default of "
244 __MODULE_STRING(DEFAULT_TIDV),
245 .def = DEFAULT_TIDV,
246 .arg = { .r = { .min = MIN_TXDELAY,
247 .max = MAX_TXDELAY } }
248 };
249
250 if (num_TxIntDelay > bd) {
251 adapter->tx_int_delay = TxIntDelay[bd];
252 e1000_validate_option(&adapter->tx_int_delay, &opt,
253 adapter);
254 } else {
255 adapter->tx_int_delay = opt.def;
256 }
257 }
258 /* Transmit Absolute Interrupt Delay */
259 {
260 static const struct e1000_option opt = {
261 .type = range_option,
262 .name = "Transmit Absolute Interrupt Delay",
263 .err = "using default of "
264 __MODULE_STRING(DEFAULT_TADV),
265 .def = DEFAULT_TADV,
266 .arg = { .r = { .min = MIN_TXABSDELAY,
267 .max = MAX_TXABSDELAY } }
268 };
269
270 if (num_TxAbsIntDelay > bd) {
271 adapter->tx_abs_int_delay = TxAbsIntDelay[bd];
272 e1000_validate_option(&adapter->tx_abs_int_delay, &opt,
273 adapter);
274 } else {
275 adapter->tx_abs_int_delay = opt.def;
276 }
277 }
278 /* Receive Interrupt Delay */
279 {
280 static struct e1000_option opt = {
281 .type = range_option,
282 .name = "Receive Interrupt Delay",
283 .err = "using default of "
284 __MODULE_STRING(DEFAULT_RDTR),
285 .def = DEFAULT_RDTR,
286 .arg = { .r = { .min = MIN_RXDELAY,
287 .max = MAX_RXDELAY } }
288 };
289
290 if (adapter->flags2 & FLAG2_DMA_BURST)
291 opt.def = BURST_RDTR;
292
293 if (num_RxIntDelay > bd) {
294 adapter->rx_int_delay = RxIntDelay[bd];
295 e1000_validate_option(&adapter->rx_int_delay, &opt,
296 adapter);
297 } else {
298 adapter->rx_int_delay = opt.def;
299 }
300 }
301 /* Receive Absolute Interrupt Delay */
302 {
303 static struct e1000_option opt = {
304 .type = range_option,
305 .name = "Receive Absolute Interrupt Delay",
306 .err = "using default of "
307 __MODULE_STRING(DEFAULT_RADV),
308 .def = DEFAULT_RADV,
309 .arg = { .r = { .min = MIN_RXABSDELAY,
310 .max = MAX_RXABSDELAY } }
311 };
312
313 if (adapter->flags2 & FLAG2_DMA_BURST)
314 opt.def = BURST_RADV;
315
316 if (num_RxAbsIntDelay > bd) {
317 adapter->rx_abs_int_delay = RxAbsIntDelay[bd];
318 e1000_validate_option(&adapter->rx_abs_int_delay, &opt,
319 adapter);
320 } else {
321 adapter->rx_abs_int_delay = opt.def;
322 }
323 }
324 /* Interrupt Throttling Rate */
325 {
326 static const struct e1000_option opt = {
327 .type = range_option,
328 .name = "Interrupt Throttling Rate (ints/sec)",
329 .err = "using default of "
330 __MODULE_STRING(DEFAULT_ITR),
331 .def = DEFAULT_ITR,
332 .arg = { .r = { .min = MIN_ITR,
333 .max = MAX_ITR } }
334 };
335
336 if (num_InterruptThrottleRate > bd) {
337 adapter->itr = InterruptThrottleRate[bd];
338
339 /* Make sure a message is printed for non-special
340 * values. And in case of an invalid option, display
341 * warning, use default and go through itr/itr_setting
342 * adjustment logic below
343 */
344 if ((adapter->itr > 4) &&
345 e1000_validate_option(&adapter->itr, &opt, adapter))
346 adapter->itr = opt.def;
347 } else {
348 /* If no option specified, use default value and go
349 * through the logic below to adjust itr/itr_setting
350 */
351 adapter->itr = opt.def;
352
353 /* Make sure a message is printed for non-special
354 * default values
355 */
356 if (adapter->itr > 4)
357 dev_info(&adapter->pdev->dev,
358 "%s set to default %d\n", opt.name,
359 adapter->itr);
360 }
361
362 adapter->itr_setting = adapter->itr;
363 switch (adapter->itr) {
364 case 0:
365 dev_info(&adapter->pdev->dev, "%s turned off\n",
366 opt.name);
367 break;
368 case 1:
369 dev_info(&adapter->pdev->dev,
370 "%s set to dynamic mode\n", opt.name);
371 adapter->itr = 20000;
372 break;
373 case 2:
374 dev_info(&adapter->pdev->dev,
375 "%s Invalid mode - setting default\n",
376 opt.name);
377 adapter->itr_setting = opt.def;
378 /* fall-through */
379 case 3:
380 dev_info(&adapter->pdev->dev,
381 "%s set to dynamic conservative mode\n",
382 opt.name);
383 adapter->itr = 20000;
384 break;
385 case 4:
386 dev_info(&adapter->pdev->dev,
387 "%s set to simplified (2000-8000 ints) mode\n",
388 opt.name);
389 break;
390 default:
391 /* Save the setting, because the dynamic bits
392 * change itr.
393 *
394 * Clear the lower two bits because
395 * they are used as control.
396 */
397 adapter->itr_setting &= ~3;
398 break;
399 }
400 }
401 /* Interrupt Mode */
402 {
403 static struct e1000_option opt = {
404 .type = range_option,
405 .name = "Interrupt Mode",
406#ifndef CONFIG_PCI_MSI
407 .err = "defaulting to 0 (legacy)",
408 .def = E1000E_INT_MODE_LEGACY,
409 .arg = { .r = { .min = 0,
410 .max = 0 } }
411#endif
412 };
413
414#ifdef CONFIG_PCI_MSI
415 if (adapter->flags & FLAG_HAS_MSIX) {
416 opt.err = kstrdup("defaulting to 2 (MSI-X)",
417 GFP_KERNEL);
418 opt.def = E1000E_INT_MODE_MSIX;
419 opt.arg.r.max = E1000E_INT_MODE_MSIX;
420 } else {
421 opt.err = kstrdup("defaulting to 1 (MSI)", GFP_KERNEL);
422 opt.def = E1000E_INT_MODE_MSI;
423 opt.arg.r.max = E1000E_INT_MODE_MSI;
424 }
425
426 if (!opt.err) {
427 dev_err(&adapter->pdev->dev,
428 "Failed to allocate memory\n");
429 return;
430 }
431#endif
432
433 if (num_IntMode > bd) {
434 unsigned int int_mode = IntMode[bd];
435
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 {
448 static const struct e1000_option opt = {
449 .type = enable_option,
450 .name = "PHY Smart Power Down",
451 .err = "defaulting to Disabled",
452 .def = OPTION_DISABLED
453 };
454
455 if (num_SmartPowerDownEnable > bd) {
456 unsigned int spd = SmartPowerDownEnable[bd];
457
458 e1000_validate_option(&spd, &opt, adapter);
459 if ((adapter->flags & FLAG_HAS_SMART_POWER_DOWN) && spd)
460 adapter->flags |= FLAG_SMART_POWER_DOWN;
461 }
462 }
463 /* CRC Stripping */
464 {
465 static const struct e1000_option opt = {
466 .type = enable_option,
467 .name = "CRC Stripping",
468 .err = "defaulting to Enabled",
469 .def = OPTION_ENABLED
470 };
471
472 if (num_CrcStripping > bd) {
473 unsigned int crc_stripping = CrcStripping[bd];
474
475 e1000_validate_option(&crc_stripping, &opt, adapter);
476 if (crc_stripping == OPTION_ENABLED) {
477 adapter->flags2 |= FLAG2_CRC_STRIPPING;
478 adapter->flags2 |= FLAG2_DFLT_CRC_STRIPPING;
479 }
480 } else {
481 adapter->flags2 |= FLAG2_CRC_STRIPPING;
482 adapter->flags2 |= FLAG2_DFLT_CRC_STRIPPING;
483 }
484 }
485 /* Kumeran Lock Loss Workaround */
486 {
487 static const struct e1000_option opt = {
488 .type = enable_option,
489 .name = "Kumeran Lock Loss Workaround",
490 .err = "defaulting to Enabled",
491 .def = OPTION_ENABLED
492 };
493 bool enabled = opt.def;
494
495 if (num_KumeranLockLoss > bd) {
496 unsigned int kmrn_lock_loss = KumeranLockLoss[bd];
497
498 e1000_validate_option(&kmrn_lock_loss, &opt, adapter);
499 enabled = kmrn_lock_loss;
500 }
501
502 if (hw->mac.type == e1000_ich8lan)
503 e1000e_set_kmrn_lock_loss_workaround_ich8lan(hw,
504 enabled);
505 }
506 /* Write-protect NVM */
507 {
508 static const struct e1000_option opt = {
509 .type = enable_option,
510 .name = "Write-protect NVM",
511 .err = "defaulting to Enabled",
512 .def = OPTION_ENABLED
513 };
514
515 if (adapter->flags & FLAG_IS_ICH) {
516 if (num_WriteProtectNVM > bd) {
517 unsigned int write_protect_nvm =
518 WriteProtectNVM[bd];
519 e1000_validate_option(&write_protect_nvm, &opt,
520 adapter);
521 if (write_protect_nvm)
522 adapter->flags |= FLAG_READ_ONLY_NVM;
523 } else {
524 if (opt.def)
525 adapter->flags |= FLAG_READ_ONLY_NVM;
526 }
527 }
528 }
529}