drivers/net/ethernet/intel/e1000e/param.c

   1 /* Intel PRO/1000 Linux driver
   2  * Copyright(c) 1999 - 2015 Intel Corporation.
   3  *
   4  * This program is free software; you can redistribute it and/or modify it
   5  * under the terms and conditions of the GNU General Public License,
   6  * version 2, as published by the Free Software Foundation.
   7  *
   8  * This program is distributed in the hope it will be useful, but WITHOUT
   9  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  10  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  11  * more details.
  12  *
  13  * The full GNU General Public License is included in this distribution in
  14  * the file called "COPYING".
  15  *
  16  * Contact Information:
  17  * Linux NICS <[email protected]>
  18  * e1000-devel Mailing List <[email protected]>
  19  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  20  */
  21
  22 #include <linux/netdevice.h>
  23 #include <linux/module.h>
  24 #include <linux/pci.h>
  25
  26 #include "e1000.h"
  27
  28 /* This is the only thing that needs to be changed to adjust the
  29  * maximum number of ports that the driver can manage.
  30  */
  31 #define E1000_MAX_NIC 32
  32
  33 #define OPTION_UNSET   -1
  34 #define OPTION_DISABLED 0
  35 #define OPTION_ENABLED  1
  36
  37 #define COPYBREAK_DEFAULT 256
  38 unsigned int copybreak = COPYBREAK_DEFAULT;
  39 module_param(copybreak, uint, 0644);
  40 MODULE_PARM_DESC(copybreak,
  41                  "Maximum size of packet that is copied to a new buffer on receive");
  42
  43 /* All parameters are treated the same, as an integer array of values.
  44  * This macro just reduces the need to repeat the same declaration code
  45  * over and over (plus this helps to avoid typo bugs).
  46  */
  47 #define E1000_PARAM_INIT { [0 ... E1000_MAX_NIC] = OPTION_UNSET }
  48 #define E1000_PARAM(X, desc)                                    \
  49         static int X[E1000_MAX_NIC+1] = E1000_PARAM_INIT;       \
  50         static unsigned int num_##X;                            \
  51         module_param_array_named(X, X, int, &num_##X, 0);       \
  52         MODULE_PARM_DESC(X, desc);
  53
  54 /* Transmit Interrupt Delay in units of 1.024 microseconds
  55  * Tx interrupt delay needs to typically be set to something non-zero
  56  *
  57  * Valid Range: 0-65535
  58  */
  59 E1000_PARAM(TxIntDelay, "Transmit Interrupt Delay");
  60 #define DEFAULT_TIDV 8
  61 #define MAX_TXDELAY 0xFFFF
  62 #define MIN_TXDELAY 0
  63
  64 /* Transmit Absolute Interrupt Delay in units of 1.024 microseconds
  65  *
  66  * Valid Range: 0-65535
  67  */
  68 E1000_PARAM(TxAbsIntDelay, "Transmit Absolute Interrupt Delay");
  69 #define DEFAULT_TADV 32
  70 #define MAX_TXABSDELAY 0xFFFF
  71 #define MIN_TXABSDELAY 0
  72
  73 /* Receive Interrupt Delay in units of 1.024 microseconds
  74  * hardware will likely hang if you set this to anything but zero.
  75  *
  76  * Burst variant is used as default if device has FLAG2_DMA_BURST.
  77  *
  78  * Valid Range: 0-65535
  79  */
  80 E1000_PARAM(RxIntDelay, "Receive Interrupt Delay");
  81 #define DEFAULT_RDTR    0
  82 #define BURST_RDTR      0x20
  83 #define MAX_RXDELAY 0xFFFF
  84 #define MIN_RXDELAY 0
  85
  86 /* Receive Absolute Interrupt Delay in units of 1.024 microseconds
  87  *
  88  * Burst variant is used as default if device has FLAG2_DMA_BURST.
  89  *
  90  * Valid Range: 0-65535
  91  */
  92 E1000_PARAM(RxAbsIntDelay, "Receive Absolute Interrupt Delay");
  93 #define DEFAULT_RADV    8
  94 #define BURST_RADV      0x20
  95 #define MAX_RXABSDELAY 0xFFFF
  96 #define MIN_RXABSDELAY 0
  97
  98 /* Interrupt Throttle Rate (interrupts/sec)
  99  *
 100  * Valid Range: 100-100000 or one of: 0=off, 1=dynamic, 3=dynamic conservative
 101  */
 102 E1000_PARAM(InterruptThrottleRate, "Interrupt Throttling Rate");
 103 #define DEFAULT_ITR 3
 104 #define MAX_ITR 100000
 105 #define MIN_ITR 100
 106
 107 /* IntMode (Interrupt Mode)
 108  *
 109  * Valid Range: varies depending on kernel configuration & hardware support
 110  *
 111  * legacy=0, MSI=1, MSI-X=2
 112  *
 113  * When MSI/MSI-X support is enabled in kernel-
 114  *   Default Value: 2 (MSI-X) when supported by hardware, 1 (MSI) otherwise
 115  * When MSI/MSI-X support is not enabled in kernel-
 116  *   Default Value: 0 (legacy)
 117  *
 118  * When a mode is specified that is not allowed/supported, it will be
 119  * demoted to the most advanced interrupt mode available.
 120  */
 121 E1000_PARAM(IntMode, "Interrupt Mode");
 122 #define MAX_INTMODE     2
 123 #define MIN_INTMODE     0
 124
 125 /* Enable Smart Power Down of the PHY
 126  *
 127  * Valid Range: 0, 1
 128  *
 129  * Default Value: 0 (disabled)
 130  */
 131 E1000_PARAM(SmartPowerDownEnable, "Enable PHY smart power down");
 132
 133 /* Enable Kumeran Lock Loss workaround
 134  *
 135  * Valid Range: 0, 1
 136  *
 137  * Default Value: 1 (enabled)
 138  */
 139 E1000_PARAM(KumeranLockLoss, "Enable Kumeran lock loss workaround");
 140
 141 /* Write Protect NVM
 142  *
 143  * Valid Range: 0, 1
 144  *
 145  * Default Value: 1 (enabled)
 146  */
 147 E1000_PARAM(WriteProtectNVM,
 148             "Write-protect NVM [WARNING: disabling this can lead to corrupted NVM]");
 149
 150 /* Enable CRC Stripping
 151  *
 152  * Valid Range: 0, 1
 153  *
 154  * Default Value: 1 (enabled)
 155  */
 156 E1000_PARAM(CrcStripping,
 157             "Enable CRC Stripping, disable if your BMC needs the CRC");
 158
 159 struct e1000_option {
 160         enum { enable_option, range_option, list_option } type;
 161         const char *name;
 162         const char *err;
 163         int def;
 164         union {
 165                 /* range_option info */
 166                 struct {
 167                         int min;
 168                         int max;
 169                 } r;
 170                 /* list_option info */
 171                 struct {
 172                         int nr;
 173                         struct e1000_opt_list {
 174                                 int i;
 175                                 char *str;
 176                         } *p;
 177                 } l;
 178         } arg;
 179 };
 180
 181 static int e1000_validate_option(unsigned int *value,
 182                                  const struct e1000_option *opt,
 183                                  struct e1000_adapter *adapter)
 184 {
 185         if (*value == OPTION_UNSET) {
 186                 *value = opt->def;
 187                 return 0;
 188         }
 189
 190         switch (opt->type) {
 191         case enable_option:
 192                 switch (*value) {
 193                 case OPTION_ENABLED:
 194                         dev_info(&adapter->pdev->dev, "%s Enabled\n",
 195                                  opt->name);
 196                         return 0;
 197                 case OPTION_DISABLED:
 198                         dev_info(&adapter->pdev->dev, "%s Disabled\n",
 199                                  opt->name);
 200                         return 0;
 201                 }
 202                 break;
 203         case range_option:
 204                 if (*value >= opt->arg.r.min && *value <= opt->arg.r.max) {
 205                         dev_info(&adapter->pdev->dev, "%s set to %i\n",
 206                                  opt->name, *value);
 207                         return 0;
 208                 }
 209                 break;
 210         case list_option: {
 211                 int i;
 212                 struct e1000_opt_list *ent;
 213
 214                 for (i = 0; i < opt->arg.l.nr; i++) {
 215                         ent = &opt->arg.l.p[i];
 216                         if (*value == ent->i) {
 217                                 if (ent->str[0] != '\0')
 218                                         dev_info(&adapter->pdev->dev, "%s\n",
 219                                                  ent->str);
 220                                 return 0;
 221                         }
 222                 }
 223         }
 224                 break;
 225         default:
 226                 BUG();
 227         }
 228
 229         dev_info(&adapter->pdev->dev, "Invalid %s value specified (%i) %s\n",
 230                  opt->name, *value, opt->err);
 231         *value = opt->def;
 232         return -1;
 233 }
 234
 235 /**
 236  * e1000e_check_options - Range Checking for Command Line Parameters
 237  * @adapter: board private structure
 238  *
 239  * This routine checks all command line parameters for valid user
 240  * input.  If an invalid value is given, or if no user specified
 241  * value exists, a default value is used.  The final value is stored
 242  * in a variable in the adapter structure.
 243  **/
 244 void e1000e_check_options(struct e1000_adapter *adapter)
 245 {
 246         struct e1000_hw *hw = &adapter->hw;
 247         int bd = adapter->bd_number;
 248
 249         if (bd >= E1000_MAX_NIC) {
 250                 dev_notice(&adapter->pdev->dev,
 251                            "Warning: no configuration for board #%i\n", bd);
 252                 dev_notice(&adapter->pdev->dev,
 253                            "Using defaults for all values\n");
 254         }
 255
 256         /* Transmit Interrupt Delay */
 257         {
 258                 static const struct e1000_option opt = {
 259                         .type = range_option,
 260                         .name = "Transmit Interrupt Delay",
 261                         .err  = "using default of "
 262                                 __MODULE_STRING(DEFAULT_TIDV),
 263                         .def  = DEFAULT_TIDV,
 264                         .arg  = { .r = { .min = MIN_TXDELAY,
 265                                          .max = MAX_TXDELAY } }
 266                 };
 267
 268                 if (num_TxIntDelay > bd) {
 269                         adapter->tx_int_delay = TxIntDelay[bd];
 270                         e1000_validate_option(&adapter->tx_int_delay, &opt,
 271                                               adapter);
 272                 } else {
 273                         adapter->tx_int_delay = opt.def;
 274                 }
 275         }
 276         /* Transmit Absolute Interrupt Delay */
 277         {
 278                 static const struct e1000_option opt = {
 279                         .type = range_option,
 280                         .name = "Transmit Absolute Interrupt Delay",
 281                         .err  = "using default of "
 282                                 __MODULE_STRING(DEFAULT_TADV),
 283                         .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         {
 298                 static struct e1000_option opt = {
 299                         .type = range_option,
 300                         .name = "Receive Interrupt Delay",
 301                         .err  = "using default of "
 302                                 __MODULE_STRING(DEFAULT_RDTR),
 303                         .def  = DEFAULT_RDTR,
 304                         .arg  = { .r = { .min = MIN_RXDELAY,
 305                                          .max = MAX_RXDELAY } }
 306                 };
 307
 308                 if (adapter->flags2 & FLAG2_DMA_BURST)
 309                         opt.def = BURST_RDTR;
 310
 311                 if (num_RxIntDelay > bd) {
 312                         adapter->rx_int_delay = RxIntDelay[bd];
 313                         e1000_validate_option(&adapter->rx_int_delay, &opt,
 314                                               adapter);
 315                 } else {
 316                         adapter->rx_int_delay = opt.def;
 317                 }
 318         }
 319         /* Receive Absolute Interrupt Delay */
 320         {
 321                 static struct e1000_option opt = {
 322                         .type = range_option,
 323                         .name = "Receive Absolute Interrupt Delay",
 324                         .err  = "using default of "
 325                                 __MODULE_STRING(DEFAULT_RADV),
 326                         .def  = DEFAULT_RADV,
 327                         .arg  = { .r = { .min = MIN_RXABSDELAY,
 328                                          .max = MAX_RXABSDELAY } }
 329                 };
 330
 331                 if (adapter->flags2 & FLAG2_DMA_BURST)
 332                         opt.def = BURST_RADV;
 333
 334                 if (num_RxAbsIntDelay > bd) {
 335                         adapter->rx_abs_int_delay = RxAbsIntDelay[bd];
 336                         e1000_validate_option(&adapter->rx_abs_int_delay, &opt,
 337                                               adapter);
 338                 } else {
 339                         adapter->rx_abs_int_delay = opt.def;
 340                 }
 341         }
 342         /* Interrupt Throttling Rate */
 343         {
 344                 static const struct e1000_option opt = {
 345                         .type = range_option,
 346                         .name = "Interrupt Throttling Rate (ints/sec)",
 347                         .err  = "using default of "
 348                                 __MODULE_STRING(DEFAULT_ITR),
 349                         .def  = DEFAULT_ITR,
 350                         .arg  = { .r = { .min = MIN_ITR,
 351                                          .max = MAX_ITR } }
 352                 };
 353
 354                 if (num_InterruptThrottleRate > bd) {
 355                         adapter->itr = InterruptThrottleRate[bd];
 356
 357                         /* Make sure a message is printed for non-special
 358                          * values. And in case of an invalid option, display
 359                          * warning, use default and go through itr/itr_setting
 360                          * adjustment logic below
 361                          */
 362                         if ((adapter->itr > 4) &&
 363                             e1000_validate_option(&adapter->itr, &opt, adapter))
 364                                 adapter->itr = opt.def;
 365                 } else {
 366                         /* If no option specified, use default value and go
 367                          * through the logic below to adjust itr/itr_setting
 368                          */
 369                         adapter->itr = opt.def;
 370
 371                         /* Make sure a message is printed for non-special
 372                          * default values
 373                          */
 374                         if (adapter->itr > 4)
 375                                 dev_info(&adapter->pdev->dev,
 376                                          "%s set to default %d\n", opt.name,
 377                                          adapter->itr);
 378                 }
 379
 380                 adapter->itr_setting = adapter->itr;
 381                 switch (adapter->itr) {
 382                 case 0:
 383                         dev_info(&adapter->pdev->dev, "%s turned off\n",
 384                                  opt.name);
 385                         break;
 386                 case 1:
 387                         dev_info(&adapter->pdev->dev,
 388                                  "%s set to dynamic mode\n", opt.name);
 389                         adapter->itr = 20000;
 390                         break;
 391                 case 2:
 392                         dev_info(&adapter->pdev->dev,
 393                                  "%s Invalid mode - setting default\n",
 394                                  opt.name);
 395                         adapter->itr_setting = opt.def;
 396                         /* fall-through */
 397                 case 3:
 398                         dev_info(&adapter->pdev->dev,
 399                                  "%s set to dynamic conservative mode\n",
 400                                  opt.name);
 401                         adapter->itr = 20000;
 402                         break;
 403                 case 4:
 404                         dev_info(&adapter->pdev->dev,
 405                                  "%s set to simplified (2000-8000 ints) mode\n",
 406                                  opt.name);
 407                         break;
 408                 default:
 409                         /* Save the setting, because the dynamic bits
 410                          * change itr.
 411                          *
 412                          * Clear the lower two bits because
 413                          * they are used as control.
 414                          */
 415                         adapter->itr_setting &= ~3;
 416                         break;
 417                 }
 418         }
 419         /* Interrupt Mode */
 420         {
 421                 static struct e1000_option opt = {
 422                         .type = range_option,
 423                         .name = "Interrupt Mode",
 424 #ifndef CONFIG_PCI_MSI
 425                         .err  = "defaulting to 0 (legacy)",
 426                         .def  = E1000E_INT_MODE_LEGACY,
 427                         .arg  = { .r = { .min = 0,
 428                                          .max = 0 } }
 429 #endif
 430                 };
 431
 432 #ifdef CONFIG_PCI_MSI
 433                 if (adapter->flags & FLAG_HAS_MSIX) {
 434                         opt.err = kstrdup("defaulting to 2 (MSI-X)",
 435                                           GFP_KERNEL);
 436                         opt.def = E1000E_INT_MODE_MSIX;
 437                         opt.arg.r.max = E1000E_INT_MODE_MSIX;
 438                 } else {
 439                         opt.err = kstrdup("defaulting to 1 (MSI)", GFP_KERNEL);
 440                         opt.def = E1000E_INT_MODE_MSI;
 441                         opt.arg.r.max = E1000E_INT_MODE_MSI;
 442                 }
 443
 444                 if (!opt.err) {
 445                         dev_err(&adapter->pdev->dev,
 446                                 "Failed to allocate memory\n");
 447                         return;
 448                 }
 449 #endif
 450
 451                 if (num_IntMode > bd) {
 452                         unsigned int int_mode = IntMode[bd];
 453
 454                         e1000_validate_option(&int_mode, &opt, adapter);
 455                         adapter->int_mode = int_mode;
 456                 } else {
 457                         adapter->int_mode = opt.def;
 458                 }
 459
 460 #ifdef CONFIG_PCI_MSI
 461                 kfree(opt.err);
 462 #endif
 463         }
 464         /* Smart Power Down */
 465         {
 466                 static const struct e1000_option opt = {
 467                         .type = enable_option,
 468                         .name = "PHY Smart Power Down",
 469                         .err  = "defaulting to Disabled",
 470                         .def  = OPTION_DISABLED
 471                 };
 472
 473                 if (num_SmartPowerDownEnable > bd) {
 474                         unsigned int spd = SmartPowerDownEnable[bd];
 475
 476                         e1000_validate_option(&spd, &opt, adapter);
 477                         if ((adapter->flags & FLAG_HAS_SMART_POWER_DOWN) && spd)
 478                                 adapter->flags |= FLAG_SMART_POWER_DOWN;
 479                 }
 480         }
 481         /* CRC Stripping */
 482         {
 483                 static const struct e1000_option opt = {
 484                         .type = enable_option,
 485                         .name = "CRC Stripping",
 486                         .err  = "defaulting to Enabled",
 487                         .def  = OPTION_ENABLED
 488                 };
 489
 490                 if (num_CrcStripping > bd) {
 491                         unsigned int crc_stripping = CrcStripping[bd];
 492
 493                         e1000_validate_option(&crc_stripping, &opt, adapter);
 494                         if (crc_stripping == OPTION_ENABLED) {
 495                                 adapter->flags2 |= FLAG2_CRC_STRIPPING;
 496                                 adapter->flags2 |= FLAG2_DFLT_CRC_STRIPPING;
 497                         }
 498                 } else {
 499                         adapter->flags2 |= FLAG2_CRC_STRIPPING;
 500                         adapter->flags2 |= FLAG2_DFLT_CRC_STRIPPING;
 501                 }
 502         }
 503         /* Kumeran Lock Loss Workaround */
 504         {
 505                 static const struct e1000_option opt = {
 506                         .type = enable_option,
 507                         .name = "Kumeran Lock Loss Workaround",
 508                         .err  = "defaulting to Enabled",
 509                         .def  = OPTION_ENABLED
 510                 };
 511                 bool enabled = opt.def;
 512
 513                 if (num_KumeranLockLoss > bd) {
 514                         unsigned int kmrn_lock_loss = KumeranLockLoss[bd];
 515
 516                         e1000_validate_option(&kmrn_lock_loss, &opt, adapter);
 517                         enabled = kmrn_lock_loss;
 518                 }
 519
 520                 if (hw->mac.type == e1000_ich8lan)
 521                         e1000e_set_kmrn_lock_loss_workaround_ich8lan(hw,
 522                                                                      enabled);
 523         }
 524         /* Write-protect NVM */
 525         {
 526                 static const struct e1000_option opt = {
 527                         .type = enable_option,
 528                         .name = "Write-protect NVM",
 529                         .err  = "defaulting to Enabled",
 530                         .def  = OPTION_ENABLED
 531                 };
 532
 533                 if (adapter->flags & FLAG_IS_ICH) {
 534                         if (num_WriteProtectNVM > bd) {
 535                                 unsigned int write_protect_nvm =
 536                                     WriteProtectNVM[bd];
 537                                 e1000_validate_option(&write_protect_nvm, &opt,
 538                                                       adapter);
 539                                 if (write_protect_nvm)
 540                                         adapter->flags |= FLAG_READ_ONLY_NVM;
 541                         } else {
 542                                 if (opt.def)
 543                                         adapter->flags |= FLAG_READ_ONLY_NVM;
 544                         }
 545                 }
 546         }
 547 }