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Linux 2.6.20.7
[linux/fpc-iii.git] / drivers / net / ixgb / ixgb_param.c
blobb27442a121f2fba05b388d0691c118c4170a0b78
1 /*******************************************************************************
2
3 Intel PRO/10GbE Linux driver
4 Copyright(c) 1999 - 2006 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 "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 }
Linux with added FPC-III support