drivers/net/e1000e/param.c

   1 /*******************************************************************************
   2
   3   Intel PRO/1000 Linux driver
   4   Copyright(c) 1999 - 2010 Intel Corporation.
   5
   6   This program is free software; you can redistribute it and/or modify it
   7   under the terms and conditions of the GNU General Public License,
   8   version 2, as published by the Free Software Foundation.
   9
  10   This program is distributed in the hope it will be useful, but WITHOUT
  11   ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12   FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  13   more details.
  14
  15   You should have received a copy of the GNU General Public License along with
  16   this program; if not, write to the Free Software Foundation, Inc.,
  17   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
  26
  27 *******************************************************************************/
  28
  29 #include <linux/netdevice.h>
  30 #include <linux/pci.h>
  31
  32 #include "e1000.h"
  33
  34 /*
  35  * This is the only thing that needs to be changed to adjust the
  36  * maximum number of ports that the driver can manage.
  37  */
  38
  39 #define E1000_MAX_NIC 32
  40
  41 #define OPTION_UNSET   -1
  42 #define OPTION_DISABLED 0
  43 #define OPTION_ENABLED  1
  44
  45 #define COPYBREAK_DEFAULT 256
  46 unsigned int copybreak = COPYBREAK_DEFAULT;
  47 module_param(copybreak, uint, 0644);
  48 MODULE_PARM_DESC(copybreak,
  49         "Maximum size of packet that is copied to a new buffer on receive");
  50
  51 /*
  52  * All parameters are treated the same, as an integer array of values.
  53  * This macro just reduces the need to repeat the same declaration code
  54  * over and over (plus this helps to avoid typo bugs).
  55  */
  56
  57 #define E1000_PARAM_INIT { [0 ... E1000_MAX_NIC] = OPTION_UNSET }
  58 #define E1000_PARAM(X, desc)                                    \
  59         static int __devinitdata X[E1000_MAX_NIC+1]             \
  60                 = E1000_PARAM_INIT;                             \
  61         static unsigned int num_##X;                            \
  62         module_param_array_named(X, X, int, &num_##X, 0);       \
  63         MODULE_PARM_DESC(X, desc);
  64
  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
  79  *
  80  * Valid Range: 0-65535
  81  */
  82 E1000_PARAM(TxAbsIntDelay, "Transmit Absolute Interrupt Delay");
  83 #define DEFAULT_TADV 32
  84 #define MAX_TXABSDELAY 0xFFFF
  85 #define MIN_TXABSDELAY 0
  86
  87 /*
  88  * Receive Interrupt Delay in units of 1.024 microseconds
  89  * 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 DEFAULT_RDTR 0
  95 #define MAX_RXDELAY 0xFFFF
  96 #define MIN_RXDELAY 0
  97
  98 /*
  99  * Receive Absolute Interrupt Delay in units of 1.024 microseconds
 100  *
 101  * Valid Range: 0-65535
 102  */
 103 E1000_PARAM(RxAbsIntDelay, "Receive Absolute Interrupt Delay");
 104 #define DEFAULT_RADV 8
 105 #define MAX_RXABSDELAY 0xFFFF
 106 #define MIN_RXABSDELAY 0
 107
 108 /*
 109  * Interrupt Throttle Rate (interrupts/sec)
 110  *
 111  * Valid Range: 100-100000 (0=off, 1=dynamic, 3=dynamic conservative)
 112  */
 113 E1000_PARAM(InterruptThrottleRate, "Interrupt Throttling Rate");
 114 #define DEFAULT_ITR 3
 115 #define MAX_ITR 100000
 116 #define MIN_ITR 100
 117 /* IntMode (Interrupt Mode)
 118  *
 119  * Valid Range: 0 - 2
 120  *
 121  * Default Value: 2 (MSI-X)
 122  */
 123 E1000_PARAM(IntMode, "Interrupt Mode");
 124 #define MAX_INTMODE     2
 125 #define MIN_INTMODE     0
 126
 127 /*
 128  * Enable Smart Power Down of the PHY
 129  *
 130  * Valid Range: 0, 1
 131  *
 132  * Default Value: 0 (disabled)
 133  */
 134 E1000_PARAM(SmartPowerDownEnable, "Enable PHY smart power down");
 135
 136 /*
 137  * Enable Kumeran Lock Loss workaround
 138  *
 139  * Valid Range: 0, 1
 140  *
 141  * Default Value: 1 (enabled)
 142  */
 143 E1000_PARAM(KumeranLockLoss, "Enable Kumeran lock loss workaround");
 144
 145 /*
 146  * Write Protect NVM
 147  *
 148  * Valid Range: 0, 1
 149  *
 150  * Default Value: 1 (enabled)
 151  */
 152 E1000_PARAM(WriteProtectNVM, "Write-protect NVM [WARNING: disabling this can lead to corrupted NVM]");
 153
 154 /*
 155  * Enable CRC Stripping
 156  *
 157  * Valid Range: 0, 1
 158  *
 159  * Default Value: 1 (enabled)
 160  */
 161 E1000_PARAM(CrcStripping, "Enable CRC Stripping, disable if your BMC needs " \
 162                           "the CRC");
 163
 164 struct e1000_option {
 165         enum { enable_option, range_option, list_option } type;
 166         const char *name;
 167         const char *err;
 168         int def;
 169         union {
 170                 struct { /* range_option info */
 171                         int min;
 172                         int max;
 173                 } r;
 174                 struct { /* list_option info */
 175                         int nr;
 176                         struct e1000_opt_list { int i; char *str; } *p;
 177                 } l;
 178         } arg;
 179 };
 180
 181 static int __devinit 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                         e_info("%s Enabled\n", opt->name);
 195                         return 0;
 196                 case OPTION_DISABLED:
 197                         e_info("%s Disabled\n", opt->name);
 198                         return 0;
 199                 }
 200                 break;
 201         case range_option:
 202                 if (*value >= opt->arg.r.min && *value <= opt->arg.r.max) {
 203                         e_info("%s set to %i\n", opt->name, *value);
 204                         return 0;
 205                 }
 206                 break;
 207         case list_option: {
 208                 int i;
 209                 struct e1000_opt_list *ent;
 210
 211                 for (i = 0; i < opt->arg.l.nr; i++) {
 212                         ent = &opt->arg.l.p[i];
 213                         if (*value == ent->i) {
 214                                 if (ent->str[0] != '\0')
 215                                         e_info("%s\n", ent->str);
 216                                 return 0;
 217                         }
 218                 }
 219         }
 220                 break;
 221         default:
 222                 BUG();
 223         }
 224
 225         e_info("Invalid %s value specified (%i) %s\n", opt->name, *value,
 226                opt->err);
 227         *value = opt->def;
 228         return -1;
 229 }
 230
 231 /**
 232  * e1000e_check_options - Range Checking for Command Line Parameters
 233  * @adapter: board private structure
 234  *
 235  * This routine checks all command line parameters for valid user
 236  * input.  If an invalid value is given, or if no user specified
 237  * value exists, a default value is used.  The final value is stored
 238  * in a variable in the adapter structure.
 239  **/
 240 void __devinit e1000e_check_options(struct e1000_adapter *adapter)
 241 {
 242         struct e1000_hw *hw = &adapter->hw;
 243         int bd = adapter->bd_number;
 244
 245         if (bd >= E1000_MAX_NIC) {
 246                 e_notice("Warning: no configuration for board #%i\n", bd);
 247                 e_notice("Using defaults for all values\n");
 248         }
 249
 250         { /* Transmit Interrupt Delay */
 251                 static const struct e1000_option opt = {
 252                         .type = range_option,
 253                         .name = "Transmit Interrupt Delay",
 254                         .err  = "using default of "
 255                                 __MODULE_STRING(DEFAULT_TIDV),
 256                         .def  = DEFAULT_TIDV,
 257                         .arg  = { .r = { .min = MIN_TXDELAY,
 258                                          .max = MAX_TXDELAY } }
 259                 };
 260
 261                 if (num_TxIntDelay > bd) {
 262                         adapter->tx_int_delay = TxIntDelay[bd];
 263                         e1000_validate_option(&adapter->tx_int_delay, &opt,
 264                                               adapter);
 265                 } else {
 266                         adapter->tx_int_delay = opt.def;
 267                 }
 268         }
 269         { /* Transmit Absolute Interrupt Delay */
 270                 static const struct e1000_option opt = {
 271                         .type = range_option,
 272                         .name = "Transmit Absolute Interrupt Delay",
 273                         .err  = "using default of "
 274                                 __MODULE_STRING(DEFAULT_TADV),
 275                         .def  = DEFAULT_TADV,
 276                         .arg  = { .r = { .min = MIN_TXABSDELAY,
 277                                          .max = MAX_TXABSDELAY } }
 278                 };
 279
 280                 if (num_TxAbsIntDelay > bd) {
 281                         adapter->tx_abs_int_delay = TxAbsIntDelay[bd];
 282                         e1000_validate_option(&adapter->tx_abs_int_delay, &opt,
 283                                               adapter);
 284                 } else {
 285                         adapter->tx_abs_int_delay = opt.def;
 286                 }
 287         }
 288         { /* Receive Interrupt Delay */
 289                 static struct e1000_option opt = {
 290                         .type = range_option,
 291                         .name = "Receive Interrupt Delay",
 292                         .err  = "using default of "
 293                                 __MODULE_STRING(DEFAULT_RDTR),
 294                         .def  = DEFAULT_RDTR,
 295                         .arg  = { .r = { .min = MIN_RXDELAY,
 296                                          .max = MAX_RXDELAY } }
 297                 };
 298
 299                 if (num_RxIntDelay > bd) {
 300                         adapter->rx_int_delay = RxIntDelay[bd];
 301                         e1000_validate_option(&adapter->rx_int_delay, &opt,
 302                                               adapter);
 303                 } else {
 304                         adapter->rx_int_delay = opt.def;
 305                 }
 306         }
 307         { /* Receive Absolute Interrupt Delay */
 308                 static const struct e1000_option opt = {
 309                         .type = range_option,
 310                         .name = "Receive Absolute Interrupt Delay",
 311                         .err  = "using default of "
 312                                 __MODULE_STRING(DEFAULT_RADV),
 313                         .def  = DEFAULT_RADV,
 314                         .arg  = { .r = { .min = MIN_RXABSDELAY,
 315                                          .max = MAX_RXABSDELAY } }
 316                 };
 317
 318                 if (num_RxAbsIntDelay > bd) {
 319                         adapter->rx_abs_int_delay = RxAbsIntDelay[bd];
 320                         e1000_validate_option(&adapter->rx_abs_int_delay, &opt,
 321                                               adapter);
 322                 } else {
 323                         adapter->rx_abs_int_delay = opt.def;
 324                 }
 325         }
 326         { /* Interrupt Throttling Rate */
 327                 static const struct e1000_option opt = {
 328                         .type = range_option,
 329                         .name = "Interrupt Throttling Rate (ints/sec)",
 330                         .err  = "using default of "
 331                                 __MODULE_STRING(DEFAULT_ITR),
 332                         .def  = DEFAULT_ITR,
 333                         .arg  = { .r = { .min = MIN_ITR,
 334                                          .max = MAX_ITR } }
 335                 };
 336
 337                 if (num_InterruptThrottleRate > bd) {
 338                         adapter->itr = InterruptThrottleRate[bd];
 339                         switch (adapter->itr) {
 340                         case 0:
 341                                 e_info("%s turned off\n", opt.name);
 342                                 break;
 343                         case 1:
 344                                 e_info("%s set to dynamic mode\n", opt.name);
 345                                 adapter->itr_setting = adapter->itr;
 346                                 adapter->itr = 20000;
 347                                 break;
 348                         case 3:
 349                                 e_info("%s set to dynamic conservative mode\n",
 350                                         opt.name);
 351                                 adapter->itr_setting = adapter->itr;
 352                                 adapter->itr = 20000;
 353                                 break;
 354                         case 4:
 355                                 e_info("%s set to simplified (2000-8000 ints) "
 356                                        "mode\n", opt.name);
 357                                 adapter->itr_setting = 4;
 358                                 break;
 359                         default:
 360                                 /*
 361                                  * Save the setting, because the dynamic bits
 362                                  * change itr.
 363                                  */
 364                                 if (e1000_validate_option(&adapter->itr, &opt,
 365                                                           adapter) &&
 366                                     (adapter->itr == 3)) {
 367                                         /*
 368                                          * In case of invalid user value,
 369                                          * default to conservative mode.
 370                                          */
 371                                         adapter->itr_setting = adapter->itr;
 372                                         adapter->itr = 20000;
 373                                 } else {
 374                                         /*
 375                                          * Clear the lower two bits because
 376                                          * they are used as control.
 377                                          */
 378                                         adapter->itr_setting =
 379                                                 adapter->itr & ~3;
 380                                 }
 381                                 break;
 382                         }
 383                 } else {
 384                         adapter->itr_setting = opt.def;
 385                         adapter->itr = 20000;
 386                 }
 387         }
 388         { /* Interrupt Mode */
 389                 static struct e1000_option opt = {
 390                         .type = range_option,
 391                         .name = "Interrupt Mode",
 392                         .err  = "defaulting to 2 (MSI-X)",
 393                         .def  = E1000E_INT_MODE_MSIX,
 394                         .arg  = { .r = { .min = MIN_INTMODE,
 395                                          .max = MAX_INTMODE } }
 396                 };
 397
 398                 if (num_IntMode > bd) {
 399                         unsigned int int_mode = IntMode[bd];
 400                         e1000_validate_option(&int_mode, &opt, adapter);
 401                         adapter->int_mode = int_mode;
 402                 } else {
 403                         adapter->int_mode = opt.def;
 404                 }
 405         }
 406         { /* Smart Power Down */
 407                 static const struct e1000_option opt = {
 408                         .type = enable_option,
 409                         .name = "PHY Smart Power Down",
 410                         .err  = "defaulting to Disabled",
 411                         .def  = OPTION_DISABLED
 412                 };
 413
 414                 if (num_SmartPowerDownEnable > bd) {
 415                         unsigned int spd = SmartPowerDownEnable[bd];
 416                         e1000_validate_option(&spd, &opt, adapter);
 417                         if ((adapter->flags & FLAG_HAS_SMART_POWER_DOWN)
 418                             && spd)
 419                                 adapter->flags |= FLAG_SMART_POWER_DOWN;
 420                 }
 421         }
 422         { /* CRC Stripping */
 423                 static const struct e1000_option opt = {
 424                         .type = enable_option,
 425                         .name = "CRC Stripping",
 426                         .err  = "defaulting to enabled",
 427                         .def  = OPTION_ENABLED
 428                 };
 429
 430                 if (num_CrcStripping > bd) {
 431                         unsigned int crc_stripping = CrcStripping[bd];
 432                         e1000_validate_option(&crc_stripping, &opt, adapter);
 433                         if (crc_stripping == OPTION_ENABLED)
 434                                 adapter->flags2 |= FLAG2_CRC_STRIPPING;
 435                 } else {
 436                         adapter->flags2 |= FLAG2_CRC_STRIPPING;
 437                 }
 438         }
 439         { /* Kumeran Lock Loss Workaround */
 440                 static const struct e1000_option opt = {
 441                         .type = enable_option,
 442                         .name = "Kumeran Lock Loss Workaround",
 443                         .err  = "defaulting to Enabled",
 444                         .def  = OPTION_ENABLED
 445                 };
 446
 447                 if (num_KumeranLockLoss > bd) {
 448                         unsigned int kmrn_lock_loss = KumeranLockLoss[bd];
 449                         e1000_validate_option(&kmrn_lock_loss, &opt, adapter);
 450                         if (hw->mac.type == e1000_ich8lan)
 451                                 e1000e_set_kmrn_lock_loss_workaround_ich8lan(hw,
 452                                                                 kmrn_lock_loss);
 453                 } else {
 454                         if (hw->mac.type == e1000_ich8lan)
 455                                 e1000e_set_kmrn_lock_loss_workaround_ich8lan(hw,
 456                                                                        opt.def);
 457                 }
 458         }
 459         { /* Write-protect NVM */
 460                 static const struct e1000_option opt = {
 461                         .type = enable_option,
 462                         .name = "Write-protect NVM",
 463                         .err  = "defaulting to Enabled",
 464                         .def  = OPTION_ENABLED
 465                 };
 466
 467                 if (adapter->flags & FLAG_IS_ICH) {
 468                         if (num_WriteProtectNVM > bd) {
 469                                 unsigned int write_protect_nvm = WriteProtectNVM[bd];
 470                                 e1000_validate_option(&write_protect_nvm, &opt,
 471                                                       adapter);
 472                                 if (write_protect_nvm)
 473                                         adapter->flags |= FLAG_READ_ONLY_NVM;
 474                         } else {
 475                                 if (opt.def)
 476                                         adapter->flags |= FLAG_READ_ONLY_NVM;
 477                         }
 478                 }
 479         }
 480 }