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pcmcia: CompactFlash driver for PA Semi Electra boards
[pv_ops_mirror.git] / drivers / net / ixgb / ixgb_param.c
blob5d5ddabf4360ccfdf6f15fb9c4600aa7c395933e
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 /**
249 * ixgb_check_options - Range Checking for Command Line Parameters
250 * @adapter: board private structure
251 *
252 * This routine checks all command line parameters for valid user
253 * input. If an invalid value is given, or if no user specified
254 * value exists, a default value is used. The final value is stored
255 * in a variable in the adapter structure.
256 **/
257
258 void __devinit
259 ixgb_check_options(struct ixgb_adapter *adapter)
260 {
261 int bd = adapter->bd_number;
262 if(bd >= IXGB_MAX_NIC) {
263 printk(KERN_NOTICE
264 "Warning: no configuration for board #%i\n", bd);
265 printk(KERN_NOTICE "Using defaults for all values\n");
266 }
267
268 { /* Transmit Descriptor Count */
269 struct ixgb_option opt = {
270 .type = range_option,
271 .name = "Transmit Descriptors",
272 .err = "using default of " __MODULE_STRING(DEFAULT_TXD),
273 .def = DEFAULT_TXD,
274 .arg = { .r = { .min = MIN_TXD,
275 .max = MAX_TXD}}
276 };
277 struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
278
279 if(num_TxDescriptors > bd) {
280 tx_ring->count = TxDescriptors[bd];
281 ixgb_validate_option(&tx_ring->count, &opt);
282 } else {
283 tx_ring->count = opt.def;
284 }
285 tx_ring->count = ALIGN(tx_ring->count, IXGB_REQ_TX_DESCRIPTOR_MULTIPLE);
286 }
287 { /* Receive Descriptor Count */
288 struct ixgb_option opt = {
289 .type = range_option,
290 .name = "Receive Descriptors",
291 .err = "using default of " __MODULE_STRING(DEFAULT_RXD),
292 .def = DEFAULT_RXD,
293 .arg = { .r = { .min = MIN_RXD,
294 .max = MAX_RXD}}
295 };
296 struct ixgb_desc_ring *rx_ring = &adapter->rx_ring;
297
298 if(num_RxDescriptors > bd) {
299 rx_ring->count = RxDescriptors[bd];
300 ixgb_validate_option(&rx_ring->count, &opt);
301 } else {
302 rx_ring->count = opt.def;
303 }
304 rx_ring->count = ALIGN(rx_ring->count, IXGB_REQ_RX_DESCRIPTOR_MULTIPLE);
305 }
306 { /* Receive Checksum Offload Enable */
307 struct ixgb_option opt = {
308 .type = enable_option,
309 .name = "Receive Checksum Offload",
310 .err = "defaulting to Enabled",
311 .def = OPTION_ENABLED
312 };
313
314 if(num_XsumRX > bd) {
315 int rx_csum = XsumRX[bd];
316 ixgb_validate_option(&rx_csum, &opt);
317 adapter->rx_csum = rx_csum;
318 } else {
319 adapter->rx_csum = opt.def;
320 }
321 }
322 { /* Flow Control */
323
324 struct ixgb_opt_list fc_list[] =
325 {{ ixgb_fc_none, "Flow Control Disabled" },
326 { ixgb_fc_rx_pause,"Flow Control Receive Only" },
327 { ixgb_fc_tx_pause,"Flow Control Transmit Only" },
328 { ixgb_fc_full, "Flow Control Enabled" },
329 { ixgb_fc_default, "Flow Control Hardware Default" }};
330
331 struct ixgb_option opt = {
332 .type = list_option,
333 .name = "Flow Control",
334 .err = "reading default settings from EEPROM",
335 .def = ixgb_fc_tx_pause,
336 .arg = { .l = { .nr = ARRAY_SIZE(fc_list),
337 .p = fc_list }}
338 };
339
340 if(num_FlowControl > bd) {
341 int fc = FlowControl[bd];
342 ixgb_validate_option(&fc, &opt);
343 adapter->hw.fc.type = fc;
344 } else {
345 adapter->hw.fc.type = opt.def;
346 }
347 }
348 { /* Receive Flow Control High Threshold */
349 struct ixgb_option opt = {
350 .type = range_option,
351 .name = "Rx Flow Control High Threshold",
352 .err = "using default of " __MODULE_STRING(DEFAULT_FCRTH),
353 .def = DEFAULT_FCRTH,
354 .arg = { .r = { .min = MIN_FCRTH,
355 .max = MAX_FCRTH}}
356 };
357
358 if(num_RxFCHighThresh > bd) {
359 adapter->hw.fc.high_water = RxFCHighThresh[bd];
360 ixgb_validate_option(&adapter->hw.fc.high_water, &opt);
361 } else {
362 adapter->hw.fc.high_water = opt.def;
363 }
364 if (!(adapter->hw.fc.type & ixgb_fc_tx_pause) )
365 printk (KERN_INFO
366 "Ignoring RxFCHighThresh when no RxFC\n");
367 }
368 { /* Receive Flow Control Low Threshold */
369 struct ixgb_option opt = {
370 .type = range_option,
371 .name = "Rx Flow Control Low Threshold",
372 .err = "using default of " __MODULE_STRING(DEFAULT_FCRTL),
373 .def = DEFAULT_FCRTL,
374 .arg = { .r = { .min = MIN_FCRTL,
375 .max = MAX_FCRTL}}
376 };
377
378 if(num_RxFCLowThresh > bd) {
379 adapter->hw.fc.low_water = RxFCLowThresh[bd];
380 ixgb_validate_option(&adapter->hw.fc.low_water, &opt);
381 } else {
382 adapter->hw.fc.low_water = opt.def;
383 }
384 if (!(adapter->hw.fc.type & ixgb_fc_tx_pause) )
385 printk (KERN_INFO
386 "Ignoring RxFCLowThresh when no RxFC\n");
387 }
388 { /* Flow Control Pause Time Request*/
389 struct ixgb_option opt = {
390 .type = range_option,
391 .name = "Flow Control Pause Time Request",
392 .err = "using default of "__MODULE_STRING(DEFAULT_FCPAUSE),
393 .def = DEFAULT_FCPAUSE,
394 .arg = { .r = { .min = MIN_FCPAUSE,
395 .max = MAX_FCPAUSE}}
396 };
397
398 if(num_FCReqTimeout > bd) {
399 int pause_time = FCReqTimeout[bd];
400 ixgb_validate_option(&pause_time, &opt);
401 adapter->hw.fc.pause_time = pause_time;
402 } else {
403 adapter->hw.fc.pause_time = opt.def;
404 }
405 if (!(adapter->hw.fc.type & ixgb_fc_tx_pause) )
406 printk (KERN_INFO
407 "Ignoring FCReqTimeout when no RxFC\n");
408 }
409 /* high low and spacing check for rx flow control thresholds */
410 if (adapter->hw.fc.type & ixgb_fc_tx_pause) {
411 /* high must be greater than low */
412 if (adapter->hw.fc.high_water < (adapter->hw.fc.low_water + 8)) {
413 /* set defaults */
414 printk (KERN_INFO
415 "RxFCHighThresh must be >= (RxFCLowThresh + 8), "
416 "Using Defaults\n");
417 adapter->hw.fc.high_water = DEFAULT_FCRTH;
418 adapter->hw.fc.low_water = DEFAULT_FCRTL;
419 }
420 }
421 { /* Receive Interrupt Delay */
422 struct ixgb_option opt = {
423 .type = range_option,
424 .name = "Receive Interrupt Delay",
425 .err = "using default of " __MODULE_STRING(DEFAULT_RDTR),
426 .def = DEFAULT_RDTR,
427 .arg = { .r = { .min = MIN_RDTR,
428 .max = MAX_RDTR}}
429 };
430
431 if(num_RxIntDelay > bd) {
432 adapter->rx_int_delay = RxIntDelay[bd];
433 ixgb_validate_option(&adapter->rx_int_delay, &opt);
434 } else {
435 adapter->rx_int_delay = opt.def;
436 }
437 }
438 { /* Transmit Interrupt Delay */
439 struct ixgb_option opt = {
440 .type = range_option,
441 .name = "Transmit Interrupt Delay",
442 .err = "using default of " __MODULE_STRING(DEFAULT_TIDV),
443 .def = DEFAULT_TIDV,
444 .arg = { .r = { .min = MIN_TIDV,
445 .max = MAX_TIDV}}
446 };
447
448 if(num_TxIntDelay > bd) {
449 adapter->tx_int_delay = TxIntDelay[bd];
450 ixgb_validate_option(&adapter->tx_int_delay, &opt);
451 } else {
452 adapter->tx_int_delay = opt.def;
453 }
454 }
455
456 { /* Transmit Interrupt Delay Enable */
457 struct ixgb_option opt = {
458 .type = enable_option,
459 .name = "Tx Interrupt Delay Enable",
460 .err = "defaulting to Enabled",
461 .def = OPTION_ENABLED
462 };
463
464 if(num_IntDelayEnable > bd) {
465 int ide = IntDelayEnable[bd];
466 ixgb_validate_option(&ide, &opt);
467 adapter->tx_int_delay_enable = ide;
468 } else {
469 adapter->tx_int_delay_enable = opt.def;
470 }
471 }
472 }
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