drivers/net/ixgb/ixgb_param.c

   1 /*******************************************************************************
   2
   3
   4   Copyright(c) 1999 - 2006 Intel Corporation. All rights reserved.
   5
   6   This program is free software; you can redistribute it and/or modify it
   7   under the terms of the GNU General Public License as published by the Free
   8   Software Foundation; either version 2 of the License, or (at your option)
   9   any later version.
  10
  11   This program is distributed in the hope that it will be useful, but WITHOUT
  12   ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13   FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  14   more details.
  15
  16   You should have received a copy of the GNU General Public License along with
  17   this program; if not, write to the Free Software Foundation, Inc., 59
  18   Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  19
  20   The full GNU General Public License is included in this distribution in the
  21   file called LICENSE.
  22
  23   Contact Information:
  24   Linux NICS <linux.nics@intel.com>
  25   Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  26
  27 *******************************************************************************/
  28
  29 #include "ixgb.h"
  30
  31 /* This is the only thing that needs to be changed to adjust the
  32  * maximum number of ports that the driver can manage.
  33  */
  34
  35 #define IXGB_MAX_NIC 8
  36
  37 #define OPTION_UNSET    -1
  38 #define OPTION_DISABLED 0
  39 #define OPTION_ENABLED  1
  40
  41 /* All parameters are treated the same, as an integer array of values.
  42  * This macro just reduces the need to repeat the same declaration code
  43  * over and over (plus this helps to avoid typo bugs).
  44  */
  45
  46 #define IXGB_PARAM_INIT { [0 ... IXGB_MAX_NIC] = OPTION_UNSET }
  47 #define IXGB_PARAM(X, desc) \
  48         static int __devinitdata X[IXGB_MAX_NIC+1] = IXGB_PARAM_INIT; \
  49         static int num_##X = 0; \
  50         module_param_array_named(X, X, int, &num_##X, 0); \
  51         MODULE_PARM_DESC(X, desc);
  52
  53 /* Transmit Descriptor Count
  54  *
  55  * Valid Range: 64-4096
  56  *
  57  * Default Value: 256
  58  */
  59
  60 IXGB_PARAM(TxDescriptors, "Number of transmit descriptors");
  61
  62 /* Receive Descriptor Count
  63  *
  64  * Valid Range: 64-4096
  65  *
  66  * Default Value: 1024
  67  */
  68
  69 IXGB_PARAM(RxDescriptors, "Number of receive descriptors");
  70
  71 /* User Specified Flow Control Override
  72  *
  73  * Valid Range: 0-3
  74  *  - 0 - No Flow Control
  75  *  - 1 - Rx only, respond to PAUSE frames but do not generate them
  76  *  - 2 - Tx only, generate PAUSE frames but ignore them on receive
  77  *  - 3 - Full Flow Control Support
  78  *
  79  * Default Value: 2 - Tx only (silicon bug avoidance)
  80  */
  81
  82 IXGB_PARAM(FlowControl, "Flow Control setting");
  83
  84 /* XsumRX - Receive Checksum Offload Enable/Disable
  85  *
  86  * Valid Range: 0, 1
  87  *  - 0 - disables all checksum offload
  88  *  - 1 - enables receive IP/TCP/UDP checksum offload
  89  *        on 82597 based NICs
  90  *
  91  * Default Value: 1
  92  */
  93
  94 IXGB_PARAM(XsumRX, "Disable or enable Receive Checksum offload");
  95
  96 /* Transmit Interrupt Delay in units of 0.8192 microseconds
  97  *
  98  * Valid Range: 0-65535
  99  *
 100  * Default Value: 32
 101  */
 102
 103 IXGB_PARAM(TxIntDelay, "Transmit Interrupt Delay");
 104
 105 /* Receive Interrupt Delay in units of 0.8192 microseconds
 106  *
 107  * Valid Range: 0-65535
 108  *
 109  * Default Value: 72
 110  */
 111
 112 IXGB_PARAM(RxIntDelay, "Receive Interrupt Delay");
 113
 114 /* Receive Flow control high threshold (when we send a pause frame)
 115  * (FCRTH)
 116  *
 117  * Valid Range: 1,536 - 262,136 (0x600 - 0x3FFF8, 8 byte granularity)
 118  *
 119  * Default Value: 196,608 (0x30000)
 120  */
 121
 122 IXGB_PARAM(RxFCHighThresh, "Receive Flow Control High Threshold");
 123
 124 /* Receive Flow control low threshold (when we send a resume frame)
 125  * (FCRTL)
 126  *
 127  * Valid Range: 64 - 262,136 (0x40 - 0x3FFF8, 8 byte granularity)
 128  *              must be less than high threshold by at least 8 bytes
 129  *
 130  * Default Value:  163,840 (0x28000)
 131  */
 132
 133 IXGB_PARAM(RxFCLowThresh, "Receive Flow Control Low Threshold");
 134
 135 /* Flow control request timeout (how long to pause the link partner's tx)
 136  * (PAP 15:0)
 137  *
 138  * Valid Range: 1 - 65535
 139  *
 140  * Default Value:  65535 (0xffff) (we'll send an xon if we recover)
 141  */
 142
 143 IXGB_PARAM(FCReqTimeout, "Flow Control Request Timeout");
 144
 145 /* Interrupt Delay Enable
 146  *
 147  * Valid Range: 0, 1
 148  *
 149  *  - 0 - disables transmit interrupt delay
 150  *  - 1 - enables transmmit interrupt delay
 151  *
 152  * Default Value: 1
 153  */
 154
 155 IXGB_PARAM(IntDelayEnable, "Transmit Interrupt Delay Enable");
 156
 157
 158 #define DEFAULT_TIDV                         32
 159 #define MAX_TIDV                         0xFFFF
 160 #define MIN_TIDV                              0
 161
 162 #define DEFAULT_RDTR                         72
 163 #define MAX_RDTR                         0xFFFF
 164 #define MIN_RDTR                              0
 165
 166 #define XSUMRX_DEFAULT           OPTION_ENABLED
 167
 168 #define DEFAULT_FCRTL                   0x28000
 169 #define DEFAULT_FCRTH                   0x30000
 170 #define MIN_FCRTL                             0
 171 #define MAX_FCRTL                       0x3FFE8
 172 #define MIN_FCRTH                             8
 173 #define MAX_FCRTH                       0x3FFF0
 174
 175 #define MIN_FCPAUSE                           1
 176 #define MAX_FCPAUSE                      0xffff
 177 #define DEFAULT_FCPAUSE                  0xFFFF /* this may be too long */
 178
 179 struct ixgb_option {
 180         enum { enable_option, range_option, list_option } type;
 181         char *name;
 182         char *err;
 183         int def;
 184         union {
 185                 struct {        /* range_option info */
 186                         int min;
 187                         int max;
 188                 } r;
 189                 struct {        /* list_option info */
 190                         int nr;
 191                         struct ixgb_opt_list {
 192                                 int i;
 193                                 char *str;
 194                         } *p;
 195                 } l;
 196         } arg;
 197 };
 198
 199 static int __devinit
 200 ixgb_validate_option(int *value, struct ixgb_option *opt)
 201 {
 202         if(*value == OPTION_UNSET) {
 203                 *value = opt->def;
 204                 return 0;
 205         }
 206
 207         switch (opt->type) {
 208         case enable_option:
 209                 switch (*value) {
 210                 case OPTION_ENABLED:
 211                         printk(KERN_INFO "%s Enabled\n", opt->name);
 212                         return 0;
 213                 case OPTION_DISABLED:
 214                         printk(KERN_INFO "%s Disabled\n", opt->name);
 215                         return 0;
 216                 }
 217                 break;
 218         case range_option:
 219                 if(*value >= opt->arg.r.min && *value <= opt->arg.r.max) {
 220                         printk(KERN_INFO "%s set to %i\n", opt->name, *value);
 221                         return 0;
 222                 }
 223                 break;
 224         case list_option: {
 225                 int i;
 226                 struct ixgb_opt_list *ent;
 227
 228                 for(i = 0; i < opt->arg.l.nr; i++) {
 229                         ent = &opt->arg.l.p[i];
 230                         if(*value == ent->i) {
 231                                 if(ent->str[0] != '\0')
 232                                         printk(KERN_INFO "%s\n", ent->str);
 233                                 return 0;
 234                         }
 235                 }
 236         }
 237                 break;
 238         default:
 239                 BUG();
 240         }
 241
 242         printk(KERN_INFO "Invalid %s specified (%i) %s\n",
 243                    opt->name, *value, opt->err);
 244         *value = opt->def;
 245         return -1;
 246 }
 247
 248 #define LIST_LEN(l) (sizeof(l) / sizeof(l[0]))
 249
 250 /**
 251  * ixgb_check_options - Range Checking for Command Line Parameters
 252  * @adapter: board private structure
 253  *
 254  * This routine checks all command line parameters for valid user
 255  * input.  If an invalid value is given, or if no user specified
 256  * value exists, a default value is used.  The final value is stored
 257  * in a variable in the adapter structure.
 258  **/
 259
 260 void __devinit
 261 ixgb_check_options(struct ixgb_adapter *adapter)
 262 {
 263         int bd = adapter->bd_number;
 264         if(bd >= IXGB_MAX_NIC) {
 265                 printk(KERN_NOTICE
 266                            "Warning: no configuration for board #%i\n", bd);
 267                 printk(KERN_NOTICE "Using defaults for all values\n");
 268         }
 269
 270         { /* Transmit Descriptor Count */
 271                 struct ixgb_option opt = {
 272                         .type = range_option,
 273                         .name = "Transmit Descriptors",
 274                         .err  = "using default of " __MODULE_STRING(DEFAULT_TXD),
 275                         .def  = DEFAULT_TXD,
 276                         .arg  = { .r = { .min = MIN_TXD,
 277                                          .max = MAX_TXD}}
 278                 };
 279                 struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
 280
 281                 if(num_TxDescriptors > bd) {
 282                         tx_ring->count = TxDescriptors[bd];
 283                         ixgb_validate_option(&tx_ring->count, &opt);
 284                 } else {
 285                         tx_ring->count = opt.def;
 286                 }
 287                 IXGB_ROUNDUP(tx_ring->count, IXGB_REQ_TX_DESCRIPTOR_MULTIPLE);
 288         }
 289         { /* Receive Descriptor Count */
 290                 struct ixgb_option opt = {
 291                         .type = range_option,
 292                         .name = "Receive Descriptors",
 293                         .err  = "using default of " __MODULE_STRING(DEFAULT_RXD),
 294                         .def  = DEFAULT_RXD,
 295                         .arg  = { .r = { .min = MIN_RXD,
 296                                          .max = MAX_RXD}}
 297                 };
 298                 struct ixgb_desc_ring *rx_ring = &adapter->rx_ring;
 299
 300                 if(num_RxDescriptors > bd) {
 301                         rx_ring->count = RxDescriptors[bd];
 302                         ixgb_validate_option(&rx_ring->count, &opt);
 303                 } else {
 304                         rx_ring->count = opt.def;
 305                 }
 306                 IXGB_ROUNDUP(rx_ring->count, IXGB_REQ_RX_DESCRIPTOR_MULTIPLE);
 307         }
 308         { /* Receive Checksum Offload Enable */
 309                 struct ixgb_option opt = {
 310                         .type = enable_option,
 311                         .name = "Receive Checksum Offload",
 312                         .err  = "defaulting to Enabled",
 313                         .def  = OPTION_ENABLED
 314                 };
 315
 316                 if(num_XsumRX > bd) {
 317                         int rx_csum = XsumRX[bd];
 318                         ixgb_validate_option(&rx_csum, &opt);
 319                         adapter->rx_csum = rx_csum;
 320                 } else {
 321                         adapter->rx_csum = opt.def;
 322                 }
 323         }
 324         { /* Flow Control */
 325
 326                 struct ixgb_opt_list fc_list[] =
 327                         {{ ixgb_fc_none,        "Flow Control Disabled" },
 328                          { ixgb_fc_rx_pause,"Flow Control Receive Only" },
 329                          { ixgb_fc_tx_pause,"Flow Control Transmit Only" },
 330                          { ixgb_fc_full,        "Flow Control Enabled" },
 331                          { ixgb_fc_default, "Flow Control Hardware Default" }};
 332
 333                 struct ixgb_option opt = {
 334                         .type = list_option,
 335                         .name = "Flow Control",
 336                         .err  = "reading default settings from EEPROM",
 337                         .def  = ixgb_fc_tx_pause,
 338                         .arg  = { .l = { .nr = LIST_LEN(fc_list),
 339                                          .p = fc_list }}
 340                 };
 341
 342                 if(num_FlowControl > bd) {
 343                         int fc = FlowControl[bd];
 344                         ixgb_validate_option(&fc, &opt);
 345                         adapter->hw.fc.type = fc;
 346                 } else {
 347                         adapter->hw.fc.type = opt.def;
 348                 }
 349         }
 350         { /* Receive Flow Control High Threshold */
 351                 struct ixgb_option opt = {
 352                         .type = range_option,
 353                         .name = "Rx Flow Control High Threshold",
 354                         .err  = "using default of " __MODULE_STRING(DEFAULT_FCRTH),
 355                         .def  = DEFAULT_FCRTH,
 356                         .arg  = { .r = { .min = MIN_FCRTH,
 357                                          .max = MAX_FCRTH}}
 358                 };
 359
 360                 if(num_RxFCHighThresh > bd) {
 361                         adapter->hw.fc.high_water = RxFCHighThresh[bd];
 362                         ixgb_validate_option(&adapter->hw.fc.high_water, &opt);
 363                 } else {
 364                         adapter->hw.fc.high_water = opt.def;
 365                 }
 366                 if (!(adapter->hw.fc.type & ixgb_fc_tx_pause) )
 367                         printk (KERN_INFO
 368                                 "Ignoring RxFCHighThresh when no RxFC\n");
 369         }
 370         { /* Receive Flow Control Low Threshold */
 371                 struct ixgb_option opt = {
 372                         .type = range_option,
 373                         .name = "Rx Flow Control Low Threshold",
 374                         .err  = "using default of " __MODULE_STRING(DEFAULT_FCRTL),
 375                         .def  = DEFAULT_FCRTL,
 376                         .arg  = { .r = { .min = MIN_FCRTL,
 377                                          .max = MAX_FCRTL}}
 378                 };
 379
 380                 if(num_RxFCLowThresh > bd) {
 381                         adapter->hw.fc.low_water = RxFCLowThresh[bd];
 382                         ixgb_validate_option(&adapter->hw.fc.low_water, &opt);
 383                 } else {
 384                         adapter->hw.fc.low_water = opt.def;
 385                 }
 386                 if (!(adapter->hw.fc.type & ixgb_fc_tx_pause) )
 387                         printk (KERN_INFO
 388                                 "Ignoring RxFCLowThresh when no RxFC\n");
 389         }
 390         { /* Flow Control Pause Time Request*/
 391                 struct ixgb_option opt = {
 392                         .type = range_option,
 393                         .name = "Flow Control Pause Time Request",
 394                         .err  = "using default of "__MODULE_STRING(DEFAULT_FCPAUSE),
 395                         .def  = DEFAULT_FCPAUSE,
 396                         .arg = { .r = { .min = MIN_FCPAUSE,
 397                                         .max = MAX_FCPAUSE}}
 398                 };
 399
 400                 if(num_FCReqTimeout > bd) {
 401                         int pause_time = FCReqTimeout[bd];
 402                         ixgb_validate_option(&pause_time, &opt);
 403                         adapter->hw.fc.pause_time = pause_time;
 404                 } else {
 405                         adapter->hw.fc.pause_time = opt.def;
 406                 }
 407                 if (!(adapter->hw.fc.type & ixgb_fc_tx_pause) )
 408                         printk (KERN_INFO
 409                                 "Ignoring FCReqTimeout when no RxFC\n");
 410         }
 411         /* high low and spacing check for rx flow control thresholds */
 412         if (adapter->hw.fc.type & ixgb_fc_tx_pause) {
 413                 /* high must be greater than low */
 414                 if (adapter->hw.fc.high_water < (adapter->hw.fc.low_water + 8)) {
 415                         /* set defaults */
 416                         printk (KERN_INFO
 417                                 "RxFCHighThresh must be >= (RxFCLowThresh + 8), "
 418                                 "Using Defaults\n");
 419                         adapter->hw.fc.high_water = DEFAULT_FCRTH;
 420                         adapter->hw.fc.low_water  = DEFAULT_FCRTL;
 421                 }
 422         }
 423         { /* Receive Interrupt Delay */
 424                 struct ixgb_option opt = {
 425                         .type = range_option,
 426                         .name = "Receive Interrupt Delay",
 427                         .err  = "using default of " __MODULE_STRING(DEFAULT_RDTR),
 428                         .def  = DEFAULT_RDTR,
 429                         .arg  = { .r = { .min = MIN_RDTR,
 430                                          .max = MAX_RDTR}}
 431                 };
 432
 433                 if(num_RxIntDelay > bd) {
 434                         adapter->rx_int_delay = RxIntDelay[bd];
 435                         ixgb_validate_option(&adapter->rx_int_delay, &opt);
 436                 } else {
 437                         adapter->rx_int_delay = opt.def;
 438                 }
 439         }
 440         { /* Transmit Interrupt Delay */
 441                 struct ixgb_option opt = {
 442                         .type = range_option,
 443                         .name = "Transmit Interrupt Delay",
 444                         .err  = "using default of " __MODULE_STRING(DEFAULT_TIDV),
 445                         .def  = DEFAULT_TIDV,
 446                         .arg  = { .r = { .min = MIN_TIDV,
 447                                          .max = MAX_TIDV}}
 448                 };
 449
 450                 if(num_TxIntDelay > bd) {
 451                         adapter->tx_int_delay = TxIntDelay[bd];
 452                         ixgb_validate_option(&adapter->tx_int_delay, &opt);
 453                 } else {
 454                         adapter->tx_int_delay = opt.def;
 455                 }
 456         }
 457
 458         { /* Transmit Interrupt Delay Enable */
 459                 struct ixgb_option opt = {
 460                         .type = enable_option,
 461                         .name = "Tx Interrupt Delay Enable",
 462                         .err  = "defaulting to Enabled",
 463                         .def  = OPTION_ENABLED
 464                 };
 465
 466                 if(num_IntDelayEnable > bd) {
 467                         int ide = IntDelayEnable[bd];
 468                         ixgb_validate_option(&ide, &opt);
 469                         adapter->tx_int_delay_enable = ide;
 470                 } else {
 471                         adapter->tx_int_delay_enable = opt.def;
 472                 }
 473         }
 474 }