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[deliverable/linux.git] / drivers / net / wireless / iwlwifi / iwl-core.c
1 /******************************************************************************
2 *
3 * GPL LICENSE SUMMARY
4 *
5 * Copyright(c) 2008 - 2012 Intel Corporation. All rights reserved.
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of version 2 of the GNU General Public License as
9 * published by the Free Software Foundation.
10 *
11 * This program is distributed in the hope that it will be useful, but
12 * WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
19 * USA
20 *
21 * The full GNU General Public License is included in this distribution
22 * in the file called LICENSE.GPL.
23 *
24 * Contact Information:
25 * Intel Linux Wireless <ilw@linux.intel.com>
26 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
27 *****************************************************************************/
28
29 #include <linux/kernel.h>
30 #include <linux/module.h>
31 #include <linux/etherdevice.h>
32 #include <linux/sched.h>
33 #include <linux/slab.h>
34 #include <net/mac80211.h>
35
36 #include "iwl-eeprom.h"
37 #include "iwl-debug.h"
38 #include "iwl-core.h"
39 #include "iwl-io.h"
40 #include "iwl-power.h"
41 #include "iwl-shared.h"
42 #include "iwl-agn.h"
43 #include "iwl-trans.h"
44
45 const u8 iwl_bcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
46
47 #define MAX_BIT_RATE_40_MHZ 150 /* Mbps */
48 #define MAX_BIT_RATE_20_MHZ 72 /* Mbps */
49 static void iwl_init_ht_hw_capab(const struct iwl_priv *priv,
50 struct ieee80211_sta_ht_cap *ht_info,
51 enum ieee80211_band band)
52 {
53 u16 max_bit_rate = 0;
54 u8 rx_chains_num = hw_params(priv).rx_chains_num;
55 u8 tx_chains_num = hw_params(priv).tx_chains_num;
56
57 ht_info->cap = 0;
58 memset(&ht_info->mcs, 0, sizeof(ht_info->mcs));
59
60 ht_info->ht_supported = true;
61
62 if (cfg(priv)->ht_params &&
63 cfg(priv)->ht_params->ht_greenfield_support)
64 ht_info->cap |= IEEE80211_HT_CAP_GRN_FLD;
65 ht_info->cap |= IEEE80211_HT_CAP_SGI_20;
66 max_bit_rate = MAX_BIT_RATE_20_MHZ;
67 if (hw_params(priv).ht40_channel & BIT(band)) {
68 ht_info->cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40;
69 ht_info->cap |= IEEE80211_HT_CAP_SGI_40;
70 ht_info->mcs.rx_mask[4] = 0x01;
71 max_bit_rate = MAX_BIT_RATE_40_MHZ;
72 }
73
74 if (iwlagn_mod_params.amsdu_size_8K)
75 ht_info->cap |= IEEE80211_HT_CAP_MAX_AMSDU;
76
77 ht_info->ampdu_factor = CFG_HT_RX_AMPDU_FACTOR_DEF;
78 ht_info->ampdu_density = CFG_HT_MPDU_DENSITY_DEF;
79
80 ht_info->mcs.rx_mask[0] = 0xFF;
81 if (rx_chains_num >= 2)
82 ht_info->mcs.rx_mask[1] = 0xFF;
83 if (rx_chains_num >= 3)
84 ht_info->mcs.rx_mask[2] = 0xFF;
85
86 /* Highest supported Rx data rate */
87 max_bit_rate *= rx_chains_num;
88 WARN_ON(max_bit_rate & ~IEEE80211_HT_MCS_RX_HIGHEST_MASK);
89 ht_info->mcs.rx_highest = cpu_to_le16(max_bit_rate);
90
91 /* Tx MCS capabilities */
92 ht_info->mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
93 if (tx_chains_num != rx_chains_num) {
94 ht_info->mcs.tx_params |= IEEE80211_HT_MCS_TX_RX_DIFF;
95 ht_info->mcs.tx_params |= ((tx_chains_num - 1) <<
96 IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT);
97 }
98 }
99
100 /**
101 * iwl_init_geos - Initialize mac80211's geo/channel info based from eeprom
102 */
103 int iwl_init_geos(struct iwl_priv *priv)
104 {
105 struct iwl_channel_info *ch;
106 struct ieee80211_supported_band *sband;
107 struct ieee80211_channel *channels;
108 struct ieee80211_channel *geo_ch;
109 struct ieee80211_rate *rates;
110 int i = 0;
111 s8 max_tx_power = IWLAGN_TX_POWER_TARGET_POWER_MIN;
112
113 if (priv->bands[IEEE80211_BAND_2GHZ].n_bitrates ||
114 priv->bands[IEEE80211_BAND_5GHZ].n_bitrates) {
115 IWL_DEBUG_INFO(priv, "Geography modes already initialized.\n");
116 set_bit(STATUS_GEO_CONFIGURED, &priv->shrd->status);
117 return 0;
118 }
119
120 channels = kcalloc(priv->channel_count,
121 sizeof(struct ieee80211_channel), GFP_KERNEL);
122 if (!channels)
123 return -ENOMEM;
124
125 rates = kcalloc(IWL_RATE_COUNT_LEGACY, sizeof(struct ieee80211_rate),
126 GFP_KERNEL);
127 if (!rates) {
128 kfree(channels);
129 return -ENOMEM;
130 }
131
132 /* 5.2GHz channels start after the 2.4GHz channels */
133 sband = &priv->bands[IEEE80211_BAND_5GHZ];
134 sband->channels = &channels[ARRAY_SIZE(iwl_eeprom_band_1)];
135 /* just OFDM */
136 sband->bitrates = &rates[IWL_FIRST_OFDM_RATE];
137 sband->n_bitrates = IWL_RATE_COUNT_LEGACY - IWL_FIRST_OFDM_RATE;
138
139 if (hw_params(priv).sku & EEPROM_SKU_CAP_11N_ENABLE)
140 iwl_init_ht_hw_capab(priv, &sband->ht_cap,
141 IEEE80211_BAND_5GHZ);
142
143 sband = &priv->bands[IEEE80211_BAND_2GHZ];
144 sband->channels = channels;
145 /* OFDM & CCK */
146 sband->bitrates = rates;
147 sband->n_bitrates = IWL_RATE_COUNT_LEGACY;
148
149 if (hw_params(priv).sku & EEPROM_SKU_CAP_11N_ENABLE)
150 iwl_init_ht_hw_capab(priv, &sband->ht_cap,
151 IEEE80211_BAND_2GHZ);
152
153 priv->ieee_channels = channels;
154 priv->ieee_rates = rates;
155
156 for (i = 0; i < priv->channel_count; i++) {
157 ch = &priv->channel_info[i];
158
159 /* FIXME: might be removed if scan is OK */
160 if (!is_channel_valid(ch))
161 continue;
162
163 sband = &priv->bands[ch->band];
164
165 geo_ch = &sband->channels[sband->n_channels++];
166
167 geo_ch->center_freq =
168 ieee80211_channel_to_frequency(ch->channel, ch->band);
169 geo_ch->max_power = ch->max_power_avg;
170 geo_ch->max_antenna_gain = 0xff;
171 geo_ch->hw_value = ch->channel;
172
173 if (is_channel_valid(ch)) {
174 if (!(ch->flags & EEPROM_CHANNEL_IBSS))
175 geo_ch->flags |= IEEE80211_CHAN_NO_IBSS;
176
177 if (!(ch->flags & EEPROM_CHANNEL_ACTIVE))
178 geo_ch->flags |= IEEE80211_CHAN_PASSIVE_SCAN;
179
180 if (ch->flags & EEPROM_CHANNEL_RADAR)
181 geo_ch->flags |= IEEE80211_CHAN_RADAR;
182
183 geo_ch->flags |= ch->ht40_extension_channel;
184
185 if (ch->max_power_avg > max_tx_power)
186 max_tx_power = ch->max_power_avg;
187 } else {
188 geo_ch->flags |= IEEE80211_CHAN_DISABLED;
189 }
190
191 IWL_DEBUG_INFO(priv, "Channel %d Freq=%d[%sGHz] %s flag=0x%X\n",
192 ch->channel, geo_ch->center_freq,
193 is_channel_a_band(ch) ? "5.2" : "2.4",
194 geo_ch->flags & IEEE80211_CHAN_DISABLED ?
195 "restricted" : "valid",
196 geo_ch->flags);
197 }
198
199 priv->tx_power_device_lmt = max_tx_power;
200 priv->tx_power_user_lmt = max_tx_power;
201 priv->tx_power_next = max_tx_power;
202
203 if ((priv->bands[IEEE80211_BAND_5GHZ].n_channels == 0) &&
204 hw_params(priv).sku & EEPROM_SKU_CAP_BAND_52GHZ) {
205 IWL_INFO(priv, "Incorrectly detected BG card as ABG. "
206 "Please send your %s to maintainer.\n",
207 trans(priv)->hw_id_str);
208 hw_params(priv).sku &= ~EEPROM_SKU_CAP_BAND_52GHZ;
209 }
210
211 IWL_INFO(priv, "Tunable channels: %d 802.11bg, %d 802.11a channels\n",
212 priv->bands[IEEE80211_BAND_2GHZ].n_channels,
213 priv->bands[IEEE80211_BAND_5GHZ].n_channels);
214
215 set_bit(STATUS_GEO_CONFIGURED, &priv->shrd->status);
216
217 return 0;
218 }
219
220 /*
221 * iwl_free_geos - undo allocations in iwl_init_geos
222 */
223 void iwl_free_geos(struct iwl_priv *priv)
224 {
225 kfree(priv->ieee_channels);
226 kfree(priv->ieee_rates);
227 clear_bit(STATUS_GEO_CONFIGURED, &priv->shrd->status);
228 }
229
230 static bool iwl_is_channel_extension(struct iwl_priv *priv,
231 enum ieee80211_band band,
232 u16 channel, u8 extension_chan_offset)
233 {
234 const struct iwl_channel_info *ch_info;
235
236 ch_info = iwl_get_channel_info(priv, band, channel);
237 if (!is_channel_valid(ch_info))
238 return false;
239
240 if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_ABOVE)
241 return !(ch_info->ht40_extension_channel &
242 IEEE80211_CHAN_NO_HT40PLUS);
243 else if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_BELOW)
244 return !(ch_info->ht40_extension_channel &
245 IEEE80211_CHAN_NO_HT40MINUS);
246
247 return false;
248 }
249
250 bool iwl_is_ht40_tx_allowed(struct iwl_priv *priv,
251 struct iwl_rxon_context *ctx,
252 struct ieee80211_sta_ht_cap *ht_cap)
253 {
254 if (!ctx->ht.enabled || !ctx->ht.is_40mhz)
255 return false;
256
257 /*
258 * We do not check for IEEE80211_HT_CAP_SUP_WIDTH_20_40
259 * the bit will not set if it is pure 40MHz case
260 */
261 if (ht_cap && !ht_cap->ht_supported)
262 return false;
263
264 #ifdef CONFIG_IWLWIFI_DEBUGFS
265 if (priv->disable_ht40)
266 return false;
267 #endif
268
269 return iwl_is_channel_extension(priv, priv->band,
270 le16_to_cpu(ctx->staging.channel),
271 ctx->ht.extension_chan_offset);
272 }
273
274 static u16 iwl_adjust_beacon_interval(u16 beacon_val, u16 max_beacon_val)
275 {
276 u16 new_val;
277 u16 beacon_factor;
278
279 /*
280 * If mac80211 hasn't given us a beacon interval, program
281 * the default into the device (not checking this here
282 * would cause the adjustment below to return the maximum
283 * value, which may break PAN.)
284 */
285 if (!beacon_val)
286 return DEFAULT_BEACON_INTERVAL;
287
288 /*
289 * If the beacon interval we obtained from the peer
290 * is too large, we'll have to wake up more often
291 * (and in IBSS case, we'll beacon too much)
292 *
293 * For example, if max_beacon_val is 4096, and the
294 * requested beacon interval is 7000, we'll have to
295 * use 3500 to be able to wake up on the beacons.
296 *
297 * This could badly influence beacon detection stats.
298 */
299
300 beacon_factor = (beacon_val + max_beacon_val) / max_beacon_val;
301 new_val = beacon_val / beacon_factor;
302
303 if (!new_val)
304 new_val = max_beacon_val;
305
306 return new_val;
307 }
308
309 int iwl_send_rxon_timing(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
310 {
311 u64 tsf;
312 s32 interval_tm, rem;
313 struct ieee80211_conf *conf = NULL;
314 u16 beacon_int;
315 struct ieee80211_vif *vif = ctx->vif;
316
317 conf = &priv->hw->conf;
318
319 lockdep_assert_held(&priv->shrd->mutex);
320
321 memset(&ctx->timing, 0, sizeof(struct iwl_rxon_time_cmd));
322
323 ctx->timing.timestamp = cpu_to_le64(priv->timestamp);
324 ctx->timing.listen_interval = cpu_to_le16(conf->listen_interval);
325
326 beacon_int = vif ? vif->bss_conf.beacon_int : 0;
327
328 /*
329 * TODO: For IBSS we need to get atim_window from mac80211,
330 * for now just always use 0
331 */
332 ctx->timing.atim_window = 0;
333
334 if (ctx->ctxid == IWL_RXON_CTX_PAN &&
335 (!ctx->vif || ctx->vif->type != NL80211_IFTYPE_STATION) &&
336 iwl_is_associated(priv, IWL_RXON_CTX_BSS) &&
337 priv->contexts[IWL_RXON_CTX_BSS].vif &&
338 priv->contexts[IWL_RXON_CTX_BSS].vif->bss_conf.beacon_int) {
339 ctx->timing.beacon_interval =
340 priv->contexts[IWL_RXON_CTX_BSS].timing.beacon_interval;
341 beacon_int = le16_to_cpu(ctx->timing.beacon_interval);
342 } else if (ctx->ctxid == IWL_RXON_CTX_BSS &&
343 iwl_is_associated(priv, IWL_RXON_CTX_PAN) &&
344 priv->contexts[IWL_RXON_CTX_PAN].vif &&
345 priv->contexts[IWL_RXON_CTX_PAN].vif->bss_conf.beacon_int &&
346 (!iwl_is_associated_ctx(ctx) || !ctx->vif ||
347 !ctx->vif->bss_conf.beacon_int)) {
348 ctx->timing.beacon_interval =
349 priv->contexts[IWL_RXON_CTX_PAN].timing.beacon_interval;
350 beacon_int = le16_to_cpu(ctx->timing.beacon_interval);
351 } else {
352 beacon_int = iwl_adjust_beacon_interval(beacon_int,
353 IWL_MAX_UCODE_BEACON_INTERVAL * TIME_UNIT);
354 ctx->timing.beacon_interval = cpu_to_le16(beacon_int);
355 }
356
357 ctx->beacon_int = beacon_int;
358
359 tsf = priv->timestamp; /* tsf is modifed by do_div: copy it */
360 interval_tm = beacon_int * TIME_UNIT;
361 rem = do_div(tsf, interval_tm);
362 ctx->timing.beacon_init_val = cpu_to_le32(interval_tm - rem);
363
364 ctx->timing.dtim_period = vif ? (vif->bss_conf.dtim_period ?: 1) : 1;
365
366 IWL_DEBUG_ASSOC(priv,
367 "beacon interval %d beacon timer %d beacon tim %d\n",
368 le16_to_cpu(ctx->timing.beacon_interval),
369 le32_to_cpu(ctx->timing.beacon_init_val),
370 le16_to_cpu(ctx->timing.atim_window));
371
372 return iwl_dvm_send_cmd_pdu(priv, ctx->rxon_timing_cmd,
373 CMD_SYNC, sizeof(ctx->timing), &ctx->timing);
374 }
375
376 void iwl_set_rxon_hwcrypto(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
377 int hw_decrypt)
378 {
379 struct iwl_rxon_cmd *rxon = &ctx->staging;
380
381 if (hw_decrypt)
382 rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
383 else
384 rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;
385
386 }
387
388 /* validate RXON structure is valid */
389 int iwl_check_rxon_cmd(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
390 {
391 struct iwl_rxon_cmd *rxon = &ctx->staging;
392 u32 errors = 0;
393
394 if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
395 if (rxon->flags & RXON_FLG_TGJ_NARROW_BAND_MSK) {
396 IWL_WARN(priv, "check 2.4G: wrong narrow\n");
397 errors |= BIT(0);
398 }
399 if (rxon->flags & RXON_FLG_RADAR_DETECT_MSK) {
400 IWL_WARN(priv, "check 2.4G: wrong radar\n");
401 errors |= BIT(1);
402 }
403 } else {
404 if (!(rxon->flags & RXON_FLG_SHORT_SLOT_MSK)) {
405 IWL_WARN(priv, "check 5.2G: not short slot!\n");
406 errors |= BIT(2);
407 }
408 if (rxon->flags & RXON_FLG_CCK_MSK) {
409 IWL_WARN(priv, "check 5.2G: CCK!\n");
410 errors |= BIT(3);
411 }
412 }
413 if ((rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1) {
414 IWL_WARN(priv, "mac/bssid mcast!\n");
415 errors |= BIT(4);
416 }
417
418 /* make sure basic rates 6Mbps and 1Mbps are supported */
419 if ((rxon->ofdm_basic_rates & IWL_RATE_6M_MASK) == 0 &&
420 (rxon->cck_basic_rates & IWL_RATE_1M_MASK) == 0) {
421 IWL_WARN(priv, "neither 1 nor 6 are basic\n");
422 errors |= BIT(5);
423 }
424
425 if (le16_to_cpu(rxon->assoc_id) > 2007) {
426 IWL_WARN(priv, "aid > 2007\n");
427 errors |= BIT(6);
428 }
429
430 if ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK))
431 == (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK)) {
432 IWL_WARN(priv, "CCK and short slot\n");
433 errors |= BIT(7);
434 }
435
436 if ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK))
437 == (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK)) {
438 IWL_WARN(priv, "CCK and auto detect");
439 errors |= BIT(8);
440 }
441
442 if ((rxon->flags & (RXON_FLG_AUTO_DETECT_MSK |
443 RXON_FLG_TGG_PROTECT_MSK)) ==
444 RXON_FLG_TGG_PROTECT_MSK) {
445 IWL_WARN(priv, "TGg but no auto-detect\n");
446 errors |= BIT(9);
447 }
448
449 if (rxon->channel == 0) {
450 IWL_WARN(priv, "zero channel is invalid\n");
451 errors |= BIT(10);
452 }
453
454 WARN(errors, "Invalid RXON (%#x), channel %d",
455 errors, le16_to_cpu(rxon->channel));
456
457 return errors ? -EINVAL : 0;
458 }
459
460 /**
461 * iwl_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed
462 * @priv: staging_rxon is compared to active_rxon
463 *
464 * If the RXON structure is changing enough to require a new tune,
465 * or is clearing the RXON_FILTER_ASSOC_MSK, then return 1 to indicate that
466 * a new tune (full RXON command, rather than RXON_ASSOC cmd) is required.
467 */
468 int iwl_full_rxon_required(struct iwl_priv *priv,
469 struct iwl_rxon_context *ctx)
470 {
471 const struct iwl_rxon_cmd *staging = &ctx->staging;
472 const struct iwl_rxon_cmd *active = &ctx->active;
473
474 #define CHK(cond) \
475 if ((cond)) { \
476 IWL_DEBUG_INFO(priv, "need full RXON - " #cond "\n"); \
477 return 1; \
478 }
479
480 #define CHK_NEQ(c1, c2) \
481 if ((c1) != (c2)) { \
482 IWL_DEBUG_INFO(priv, "need full RXON - " \
483 #c1 " != " #c2 " - %d != %d\n", \
484 (c1), (c2)); \
485 return 1; \
486 }
487
488 /* These items are only settable from the full RXON command */
489 CHK(!iwl_is_associated_ctx(ctx));
490 CHK(compare_ether_addr(staging->bssid_addr, active->bssid_addr));
491 CHK(compare_ether_addr(staging->node_addr, active->node_addr));
492 CHK(compare_ether_addr(staging->wlap_bssid_addr,
493 active->wlap_bssid_addr));
494 CHK_NEQ(staging->dev_type, active->dev_type);
495 CHK_NEQ(staging->channel, active->channel);
496 CHK_NEQ(staging->air_propagation, active->air_propagation);
497 CHK_NEQ(staging->ofdm_ht_single_stream_basic_rates,
498 active->ofdm_ht_single_stream_basic_rates);
499 CHK_NEQ(staging->ofdm_ht_dual_stream_basic_rates,
500 active->ofdm_ht_dual_stream_basic_rates);
501 CHK_NEQ(staging->ofdm_ht_triple_stream_basic_rates,
502 active->ofdm_ht_triple_stream_basic_rates);
503 CHK_NEQ(staging->assoc_id, active->assoc_id);
504
505 /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
506 * be updated with the RXON_ASSOC command -- however only some
507 * flag transitions are allowed using RXON_ASSOC */
508
509 /* Check if we are not switching bands */
510 CHK_NEQ(staging->flags & RXON_FLG_BAND_24G_MSK,
511 active->flags & RXON_FLG_BAND_24G_MSK);
512
513 /* Check if we are switching association toggle */
514 CHK_NEQ(staging->filter_flags & RXON_FILTER_ASSOC_MSK,
515 active->filter_flags & RXON_FILTER_ASSOC_MSK);
516
517 #undef CHK
518 #undef CHK_NEQ
519
520 return 0;
521 }
522
523 static void _iwl_set_rxon_ht(struct iwl_priv *priv,
524 struct iwl_ht_config *ht_conf,
525 struct iwl_rxon_context *ctx)
526 {
527 struct iwl_rxon_cmd *rxon = &ctx->staging;
528
529 if (!ctx->ht.enabled) {
530 rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |
531 RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK |
532 RXON_FLG_HT40_PROT_MSK |
533 RXON_FLG_HT_PROT_MSK);
534 return;
535 }
536
537 /* FIXME: if the definition of ht.protection changed, the "translation"
538 * will be needed for rxon->flags
539 */
540 rxon->flags |= cpu_to_le32(ctx->ht.protection << RXON_FLG_HT_OPERATING_MODE_POS);
541
542 /* Set up channel bandwidth:
543 * 20 MHz only, 20/40 mixed or pure 40 if ht40 ok */
544 /* clear the HT channel mode before set the mode */
545 rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |
546 RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
547 if (iwl_is_ht40_tx_allowed(priv, ctx, NULL)) {
548 /* pure ht40 */
549 if (ctx->ht.protection == IEEE80211_HT_OP_MODE_PROTECTION_20MHZ) {
550 rxon->flags |= RXON_FLG_CHANNEL_MODE_PURE_40;
551 /* Note: control channel is opposite of extension channel */
552 switch (ctx->ht.extension_chan_offset) {
553 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
554 rxon->flags &= ~RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
555 break;
556 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
557 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
558 break;
559 }
560 } else {
561 /* Note: control channel is opposite of extension channel */
562 switch (ctx->ht.extension_chan_offset) {
563 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
564 rxon->flags &= ~(RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
565 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
566 break;
567 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
568 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
569 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
570 break;
571 case IEEE80211_HT_PARAM_CHA_SEC_NONE:
572 default:
573 /* channel location only valid if in Mixed mode */
574 IWL_ERR(priv, "invalid extension channel offset\n");
575 break;
576 }
577 }
578 } else {
579 rxon->flags |= RXON_FLG_CHANNEL_MODE_LEGACY;
580 }
581
582 iwlagn_set_rxon_chain(priv, ctx);
583
584 IWL_DEBUG_ASSOC(priv, "rxon flags 0x%X operation mode :0x%X "
585 "extension channel offset 0x%x\n",
586 le32_to_cpu(rxon->flags), ctx->ht.protection,
587 ctx->ht.extension_chan_offset);
588 }
589
590 void iwl_set_rxon_ht(struct iwl_priv *priv, struct iwl_ht_config *ht_conf)
591 {
592 struct iwl_rxon_context *ctx;
593
594 for_each_context(priv, ctx)
595 _iwl_set_rxon_ht(priv, ht_conf, ctx);
596 }
597
598 /* Return valid, unused, channel for a passive scan to reset the RF */
599 u8 iwl_get_single_channel_number(struct iwl_priv *priv,
600 enum ieee80211_band band)
601 {
602 const struct iwl_channel_info *ch_info;
603 int i;
604 u8 channel = 0;
605 u8 min, max;
606 struct iwl_rxon_context *ctx;
607
608 if (band == IEEE80211_BAND_5GHZ) {
609 min = 14;
610 max = priv->channel_count;
611 } else {
612 min = 0;
613 max = 14;
614 }
615
616 for (i = min; i < max; i++) {
617 bool busy = false;
618
619 for_each_context(priv, ctx) {
620 busy = priv->channel_info[i].channel ==
621 le16_to_cpu(ctx->staging.channel);
622 if (busy)
623 break;
624 }
625
626 if (busy)
627 continue;
628
629 channel = priv->channel_info[i].channel;
630 ch_info = iwl_get_channel_info(priv, band, channel);
631 if (is_channel_valid(ch_info))
632 break;
633 }
634
635 return channel;
636 }
637
638 /**
639 * iwl_set_rxon_channel - Set the band and channel values in staging RXON
640 * @ch: requested channel as a pointer to struct ieee80211_channel
641
642 * NOTE: Does not commit to the hardware; it sets appropriate bit fields
643 * in the staging RXON flag structure based on the ch->band
644 */
645 void iwl_set_rxon_channel(struct iwl_priv *priv, struct ieee80211_channel *ch,
646 struct iwl_rxon_context *ctx)
647 {
648 enum ieee80211_band band = ch->band;
649 u16 channel = ch->hw_value;
650
651 if ((le16_to_cpu(ctx->staging.channel) == channel) &&
652 (priv->band == band))
653 return;
654
655 ctx->staging.channel = cpu_to_le16(channel);
656 if (band == IEEE80211_BAND_5GHZ)
657 ctx->staging.flags &= ~RXON_FLG_BAND_24G_MSK;
658 else
659 ctx->staging.flags |= RXON_FLG_BAND_24G_MSK;
660
661 priv->band = band;
662
663 IWL_DEBUG_INFO(priv, "Staging channel set to %d [%d]\n", channel, band);
664
665 }
666
667 void iwl_set_flags_for_band(struct iwl_priv *priv,
668 struct iwl_rxon_context *ctx,
669 enum ieee80211_band band,
670 struct ieee80211_vif *vif)
671 {
672 if (band == IEEE80211_BAND_5GHZ) {
673 ctx->staging.flags &=
674 ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK
675 | RXON_FLG_CCK_MSK);
676 ctx->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
677 } else {
678 /* Copied from iwl_post_associate() */
679 if (vif && vif->bss_conf.use_short_slot)
680 ctx->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
681 else
682 ctx->staging.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
683
684 ctx->staging.flags |= RXON_FLG_BAND_24G_MSK;
685 ctx->staging.flags |= RXON_FLG_AUTO_DETECT_MSK;
686 ctx->staging.flags &= ~RXON_FLG_CCK_MSK;
687 }
688 }
689
690 /*
691 * initialize rxon structure with default values from eeprom
692 */
693 void iwl_connection_init_rx_config(struct iwl_priv *priv,
694 struct iwl_rxon_context *ctx)
695 {
696 const struct iwl_channel_info *ch_info;
697
698 memset(&ctx->staging, 0, sizeof(ctx->staging));
699
700 if (!ctx->vif) {
701 ctx->staging.dev_type = ctx->unused_devtype;
702 } else switch (ctx->vif->type) {
703 case NL80211_IFTYPE_AP:
704 ctx->staging.dev_type = ctx->ap_devtype;
705 break;
706
707 case NL80211_IFTYPE_STATION:
708 ctx->staging.dev_type = ctx->station_devtype;
709 ctx->staging.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
710 break;
711
712 case NL80211_IFTYPE_ADHOC:
713 ctx->staging.dev_type = ctx->ibss_devtype;
714 ctx->staging.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
715 ctx->staging.filter_flags = RXON_FILTER_BCON_AWARE_MSK |
716 RXON_FILTER_ACCEPT_GRP_MSK;
717 break;
718
719 default:
720 IWL_ERR(priv, "Unsupported interface type %d\n",
721 ctx->vif->type);
722 break;
723 }
724
725 #if 0
726 /* TODO: Figure out when short_preamble would be set and cache from
727 * that */
728 if (!hw_to_local(priv->hw)->short_preamble)
729 ctx->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
730 else
731 ctx->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
732 #endif
733
734 ch_info = iwl_get_channel_info(priv, priv->band,
735 le16_to_cpu(ctx->active.channel));
736
737 if (!ch_info)
738 ch_info = &priv->channel_info[0];
739
740 ctx->staging.channel = cpu_to_le16(ch_info->channel);
741 priv->band = ch_info->band;
742
743 iwl_set_flags_for_band(priv, ctx, priv->band, ctx->vif);
744
745 ctx->staging.ofdm_basic_rates =
746 (IWL_OFDM_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
747 ctx->staging.cck_basic_rates =
748 (IWL_CCK_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
749
750 /* clear both MIX and PURE40 mode flag */
751 ctx->staging.flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED |
752 RXON_FLG_CHANNEL_MODE_PURE_40);
753 if (ctx->vif)
754 memcpy(ctx->staging.node_addr, ctx->vif->addr, ETH_ALEN);
755
756 ctx->staging.ofdm_ht_single_stream_basic_rates = 0xff;
757 ctx->staging.ofdm_ht_dual_stream_basic_rates = 0xff;
758 ctx->staging.ofdm_ht_triple_stream_basic_rates = 0xff;
759 }
760
761 void iwl_set_rate(struct iwl_priv *priv)
762 {
763 const struct ieee80211_supported_band *hw = NULL;
764 struct ieee80211_rate *rate;
765 struct iwl_rxon_context *ctx;
766 int i;
767
768 hw = iwl_get_hw_mode(priv, priv->band);
769 if (!hw) {
770 IWL_ERR(priv, "Failed to set rate: unable to get hw mode\n");
771 return;
772 }
773
774 priv->active_rate = 0;
775
776 for (i = 0; i < hw->n_bitrates; i++) {
777 rate = &(hw->bitrates[i]);
778 if (rate->hw_value < IWL_RATE_COUNT_LEGACY)
779 priv->active_rate |= (1 << rate->hw_value);
780 }
781
782 IWL_DEBUG_RATE(priv, "Set active_rate = %0x\n", priv->active_rate);
783
784 for_each_context(priv, ctx) {
785 ctx->staging.cck_basic_rates =
786 (IWL_CCK_BASIC_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
787
788 ctx->staging.ofdm_basic_rates =
789 (IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
790 }
791 }
792
793 void iwl_chswitch_done(struct iwl_priv *priv, bool is_success)
794 {
795 /*
796 * MULTI-FIXME
797 * See iwlagn_mac_channel_switch.
798 */
799 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
800
801 if (test_bit(STATUS_EXIT_PENDING, &priv->shrd->status))
802 return;
803
804 if (test_and_clear_bit(STATUS_CHANNEL_SWITCH_PENDING,
805 &priv->shrd->status))
806 ieee80211_chswitch_done(ctx->vif, is_success);
807 }
808
809 #ifdef CONFIG_IWLWIFI_DEBUG
810 void iwl_print_rx_config_cmd(struct iwl_priv *priv,
811 enum iwl_rxon_context_id ctxid)
812 {
813 struct iwl_rxon_context *ctx = &priv->contexts[ctxid];
814 struct iwl_rxon_cmd *rxon = &ctx->staging;
815
816 IWL_DEBUG_RADIO(priv, "RX CONFIG:\n");
817 iwl_print_hex_dump(priv, IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
818 IWL_DEBUG_RADIO(priv, "u16 channel: 0x%x\n", le16_to_cpu(rxon->channel));
819 IWL_DEBUG_RADIO(priv, "u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
820 IWL_DEBUG_RADIO(priv, "u32 filter_flags: 0x%08x\n",
821 le32_to_cpu(rxon->filter_flags));
822 IWL_DEBUG_RADIO(priv, "u8 dev_type: 0x%x\n", rxon->dev_type);
823 IWL_DEBUG_RADIO(priv, "u8 ofdm_basic_rates: 0x%02x\n",
824 rxon->ofdm_basic_rates);
825 IWL_DEBUG_RADIO(priv, "u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates);
826 IWL_DEBUG_RADIO(priv, "u8[6] node_addr: %pM\n", rxon->node_addr);
827 IWL_DEBUG_RADIO(priv, "u8[6] bssid_addr: %pM\n", rxon->bssid_addr);
828 IWL_DEBUG_RADIO(priv, "u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id));
829 }
830 #endif
831
832 static void iwlagn_fw_error(struct iwl_priv *priv, bool ondemand)
833 {
834 unsigned int reload_msec;
835 unsigned long reload_jiffies;
836
837 #ifdef CONFIG_IWLWIFI_DEBUG
838 if (iwl_have_debug_level(IWL_DL_FW_ERRORS))
839 iwl_print_rx_config_cmd(priv, IWL_RXON_CTX_BSS);
840 #endif
841
842 /* Set the FW error flag -- cleared on iwl_down */
843 set_bit(STATUS_FW_ERROR, &priv->shrd->status);
844
845 /* Cancel currently queued command. */
846 clear_bit(STATUS_HCMD_ACTIVE, &priv->shrd->status);
847
848 iwl_abort_notification_waits(priv->shrd);
849
850 /* Keep the restart process from trying to send host
851 * commands by clearing the ready bit */
852 clear_bit(STATUS_READY, &priv->shrd->status);
853
854 wake_up(&priv->shrd->wait_command_queue);
855
856 if (!ondemand) {
857 /*
858 * If firmware keep reloading, then it indicate something
859 * serious wrong and firmware having problem to recover
860 * from it. Instead of keep trying which will fill the syslog
861 * and hang the system, let's just stop it
862 */
863 reload_jiffies = jiffies;
864 reload_msec = jiffies_to_msecs((long) reload_jiffies -
865 (long) priv->reload_jiffies);
866 priv->reload_jiffies = reload_jiffies;
867 if (reload_msec <= IWL_MIN_RELOAD_DURATION) {
868 priv->reload_count++;
869 if (priv->reload_count >= IWL_MAX_CONTINUE_RELOAD_CNT) {
870 IWL_ERR(priv, "BUG_ON, Stop restarting\n");
871 return;
872 }
873 } else
874 priv->reload_count = 0;
875 }
876
877 if (!test_bit(STATUS_EXIT_PENDING, &priv->shrd->status)) {
878 if (iwlagn_mod_params.restart_fw) {
879 IWL_DEBUG_FW_ERRORS(priv,
880 "Restarting adapter due to uCode error.\n");
881 queue_work(priv->workqueue, &priv->restart);
882 } else
883 IWL_DEBUG_FW_ERRORS(priv,
884 "Detected FW error, but not restarting\n");
885 }
886 }
887
888 int iwl_set_tx_power(struct iwl_priv *priv, s8 tx_power, bool force)
889 {
890 int ret;
891 s8 prev_tx_power;
892 bool defer;
893 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
894
895 lockdep_assert_held(&priv->shrd->mutex);
896
897 if (priv->tx_power_user_lmt == tx_power && !force)
898 return 0;
899
900 if (tx_power < IWLAGN_TX_POWER_TARGET_POWER_MIN) {
901 IWL_WARN(priv,
902 "Requested user TXPOWER %d below lower limit %d.\n",
903 tx_power,
904 IWLAGN_TX_POWER_TARGET_POWER_MIN);
905 return -EINVAL;
906 }
907
908 if (tx_power > priv->tx_power_device_lmt) {
909 IWL_WARN(priv,
910 "Requested user TXPOWER %d above upper limit %d.\n",
911 tx_power, priv->tx_power_device_lmt);
912 return -EINVAL;
913 }
914
915 if (!iwl_is_ready_rf(priv->shrd))
916 return -EIO;
917
918 /* scan complete and commit_rxon use tx_power_next value,
919 * it always need to be updated for newest request */
920 priv->tx_power_next = tx_power;
921
922 /* do not set tx power when scanning or channel changing */
923 defer = test_bit(STATUS_SCANNING, &priv->shrd->status) ||
924 memcmp(&ctx->active, &ctx->staging, sizeof(ctx->staging));
925 if (defer && !force) {
926 IWL_DEBUG_INFO(priv, "Deferring tx power set\n");
927 return 0;
928 }
929
930 prev_tx_power = priv->tx_power_user_lmt;
931 priv->tx_power_user_lmt = tx_power;
932
933 ret = iwlagn_send_tx_power(priv);
934
935 /* if fail to set tx_power, restore the orig. tx power */
936 if (ret) {
937 priv->tx_power_user_lmt = prev_tx_power;
938 priv->tx_power_next = prev_tx_power;
939 }
940 return ret;
941 }
942
943 void iwl_send_bt_config(struct iwl_priv *priv)
944 {
945 struct iwl_bt_cmd bt_cmd = {
946 .lead_time = BT_LEAD_TIME_DEF,
947 .max_kill = BT_MAX_KILL_DEF,
948 .kill_ack_mask = 0,
949 .kill_cts_mask = 0,
950 };
951
952 if (!iwlagn_mod_params.bt_coex_active)
953 bt_cmd.flags = BT_COEX_DISABLE;
954 else
955 bt_cmd.flags = BT_COEX_ENABLE;
956
957 priv->bt_enable_flag = bt_cmd.flags;
958 IWL_DEBUG_INFO(priv, "BT coex %s\n",
959 (bt_cmd.flags == BT_COEX_DISABLE) ? "disable" : "active");
960
961 if (iwl_dvm_send_cmd_pdu(priv, REPLY_BT_CONFIG,
962 CMD_SYNC, sizeof(struct iwl_bt_cmd), &bt_cmd))
963 IWL_ERR(priv, "failed to send BT Coex Config\n");
964 }
965
966 int iwl_send_statistics_request(struct iwl_priv *priv, u8 flags, bool clear)
967 {
968 struct iwl_statistics_cmd statistics_cmd = {
969 .configuration_flags =
970 clear ? IWL_STATS_CONF_CLEAR_STATS : 0,
971 };
972
973 if (flags & CMD_ASYNC)
974 return iwl_dvm_send_cmd_pdu(priv, REPLY_STATISTICS_CMD,
975 CMD_ASYNC,
976 sizeof(struct iwl_statistics_cmd),
977 &statistics_cmd);
978 else
979 return iwl_dvm_send_cmd_pdu(priv, REPLY_STATISTICS_CMD,
980 CMD_SYNC,
981 sizeof(struct iwl_statistics_cmd),
982 &statistics_cmd);
983 }
984
985
986
987
988 #ifdef CONFIG_IWLWIFI_DEBUGFS
989
990 #define IWL_TRAFFIC_DUMP_SIZE (IWL_TRAFFIC_ENTRY_SIZE * IWL_TRAFFIC_ENTRIES)
991
992 void iwl_reset_traffic_log(struct iwl_priv *priv)
993 {
994 priv->tx_traffic_idx = 0;
995 priv->rx_traffic_idx = 0;
996 if (priv->tx_traffic)
997 memset(priv->tx_traffic, 0, IWL_TRAFFIC_DUMP_SIZE);
998 if (priv->rx_traffic)
999 memset(priv->rx_traffic, 0, IWL_TRAFFIC_DUMP_SIZE);
1000 }
1001
1002 int iwl_alloc_traffic_mem(struct iwl_priv *priv)
1003 {
1004 u32 traffic_size = IWL_TRAFFIC_DUMP_SIZE;
1005
1006 if (iwl_have_debug_level(IWL_DL_TX)) {
1007 if (!priv->tx_traffic) {
1008 priv->tx_traffic =
1009 kzalloc(traffic_size, GFP_KERNEL);
1010 if (!priv->tx_traffic)
1011 return -ENOMEM;
1012 }
1013 }
1014 if (iwl_have_debug_level(IWL_DL_RX)) {
1015 if (!priv->rx_traffic) {
1016 priv->rx_traffic =
1017 kzalloc(traffic_size, GFP_KERNEL);
1018 if (!priv->rx_traffic)
1019 return -ENOMEM;
1020 }
1021 }
1022 iwl_reset_traffic_log(priv);
1023 return 0;
1024 }
1025
1026 void iwl_free_traffic_mem(struct iwl_priv *priv)
1027 {
1028 kfree(priv->tx_traffic);
1029 priv->tx_traffic = NULL;
1030
1031 kfree(priv->rx_traffic);
1032 priv->rx_traffic = NULL;
1033 }
1034
1035 void iwl_dbg_log_tx_data_frame(struct iwl_priv *priv,
1036 u16 length, struct ieee80211_hdr *header)
1037 {
1038 __le16 fc;
1039 u16 len;
1040
1041 if (likely(!iwl_have_debug_level(IWL_DL_TX)))
1042 return;
1043
1044 if (!priv->tx_traffic)
1045 return;
1046
1047 fc = header->frame_control;
1048 if (ieee80211_is_data(fc)) {
1049 len = (length > IWL_TRAFFIC_ENTRY_SIZE)
1050 ? IWL_TRAFFIC_ENTRY_SIZE : length;
1051 memcpy((priv->tx_traffic +
1052 (priv->tx_traffic_idx * IWL_TRAFFIC_ENTRY_SIZE)),
1053 header, len);
1054 priv->tx_traffic_idx =
1055 (priv->tx_traffic_idx + 1) % IWL_TRAFFIC_ENTRIES;
1056 }
1057 }
1058
1059 void iwl_dbg_log_rx_data_frame(struct iwl_priv *priv,
1060 u16 length, struct ieee80211_hdr *header)
1061 {
1062 __le16 fc;
1063 u16 len;
1064
1065 if (likely(!iwl_have_debug_level(IWL_DL_RX)))
1066 return;
1067
1068 if (!priv->rx_traffic)
1069 return;
1070
1071 fc = header->frame_control;
1072 if (ieee80211_is_data(fc)) {
1073 len = (length > IWL_TRAFFIC_ENTRY_SIZE)
1074 ? IWL_TRAFFIC_ENTRY_SIZE : length;
1075 memcpy((priv->rx_traffic +
1076 (priv->rx_traffic_idx * IWL_TRAFFIC_ENTRY_SIZE)),
1077 header, len);
1078 priv->rx_traffic_idx =
1079 (priv->rx_traffic_idx + 1) % IWL_TRAFFIC_ENTRIES;
1080 }
1081 }
1082
1083 const char *get_mgmt_string(int cmd)
1084 {
1085 switch (cmd) {
1086 IWL_CMD(MANAGEMENT_ASSOC_REQ);
1087 IWL_CMD(MANAGEMENT_ASSOC_RESP);
1088 IWL_CMD(MANAGEMENT_REASSOC_REQ);
1089 IWL_CMD(MANAGEMENT_REASSOC_RESP);
1090 IWL_CMD(MANAGEMENT_PROBE_REQ);
1091 IWL_CMD(MANAGEMENT_PROBE_RESP);
1092 IWL_CMD(MANAGEMENT_BEACON);
1093 IWL_CMD(MANAGEMENT_ATIM);
1094 IWL_CMD(MANAGEMENT_DISASSOC);
1095 IWL_CMD(MANAGEMENT_AUTH);
1096 IWL_CMD(MANAGEMENT_DEAUTH);
1097 IWL_CMD(MANAGEMENT_ACTION);
1098 default:
1099 return "UNKNOWN";
1100
1101 }
1102 }
1103
1104 const char *get_ctrl_string(int cmd)
1105 {
1106 switch (cmd) {
1107 IWL_CMD(CONTROL_BACK_REQ);
1108 IWL_CMD(CONTROL_BACK);
1109 IWL_CMD(CONTROL_PSPOLL);
1110 IWL_CMD(CONTROL_RTS);
1111 IWL_CMD(CONTROL_CTS);
1112 IWL_CMD(CONTROL_ACK);
1113 IWL_CMD(CONTROL_CFEND);
1114 IWL_CMD(CONTROL_CFENDACK);
1115 default:
1116 return "UNKNOWN";
1117
1118 }
1119 }
1120
1121 void iwl_clear_traffic_stats(struct iwl_priv *priv)
1122 {
1123 memset(&priv->tx_stats, 0, sizeof(struct traffic_stats));
1124 memset(&priv->rx_stats, 0, sizeof(struct traffic_stats));
1125 }
1126
1127 /*
1128 * if CONFIG_IWLWIFI_DEBUGFS defined, iwl_update_stats function will
1129 * record all the MGMT, CTRL and DATA pkt for both TX and Rx pass.
1130 * Use debugFs to display the rx/rx_statistics
1131 * if CONFIG_IWLWIFI_DEBUGFS not being defined, then no MGMT and CTRL
1132 * information will be recorded, but DATA pkt still will be recorded
1133 * for the reason of iwl_led.c need to control the led blinking based on
1134 * number of tx and rx data.
1135 *
1136 */
1137 void iwl_update_stats(struct iwl_priv *priv, bool is_tx, __le16 fc, u16 len)
1138 {
1139 struct traffic_stats *stats;
1140
1141 if (is_tx)
1142 stats = &priv->tx_stats;
1143 else
1144 stats = &priv->rx_stats;
1145
1146 if (ieee80211_is_mgmt(fc)) {
1147 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
1148 case cpu_to_le16(IEEE80211_STYPE_ASSOC_REQ):
1149 stats->mgmt[MANAGEMENT_ASSOC_REQ]++;
1150 break;
1151 case cpu_to_le16(IEEE80211_STYPE_ASSOC_RESP):
1152 stats->mgmt[MANAGEMENT_ASSOC_RESP]++;
1153 break;
1154 case cpu_to_le16(IEEE80211_STYPE_REASSOC_REQ):
1155 stats->mgmt[MANAGEMENT_REASSOC_REQ]++;
1156 break;
1157 case cpu_to_le16(IEEE80211_STYPE_REASSOC_RESP):
1158 stats->mgmt[MANAGEMENT_REASSOC_RESP]++;
1159 break;
1160 case cpu_to_le16(IEEE80211_STYPE_PROBE_REQ):
1161 stats->mgmt[MANAGEMENT_PROBE_REQ]++;
1162 break;
1163 case cpu_to_le16(IEEE80211_STYPE_PROBE_RESP):
1164 stats->mgmt[MANAGEMENT_PROBE_RESP]++;
1165 break;
1166 case cpu_to_le16(IEEE80211_STYPE_BEACON):
1167 stats->mgmt[MANAGEMENT_BEACON]++;
1168 break;
1169 case cpu_to_le16(IEEE80211_STYPE_ATIM):
1170 stats->mgmt[MANAGEMENT_ATIM]++;
1171 break;
1172 case cpu_to_le16(IEEE80211_STYPE_DISASSOC):
1173 stats->mgmt[MANAGEMENT_DISASSOC]++;
1174 break;
1175 case cpu_to_le16(IEEE80211_STYPE_AUTH):
1176 stats->mgmt[MANAGEMENT_AUTH]++;
1177 break;
1178 case cpu_to_le16(IEEE80211_STYPE_DEAUTH):
1179 stats->mgmt[MANAGEMENT_DEAUTH]++;
1180 break;
1181 case cpu_to_le16(IEEE80211_STYPE_ACTION):
1182 stats->mgmt[MANAGEMENT_ACTION]++;
1183 break;
1184 }
1185 } else if (ieee80211_is_ctl(fc)) {
1186 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
1187 case cpu_to_le16(IEEE80211_STYPE_BACK_REQ):
1188 stats->ctrl[CONTROL_BACK_REQ]++;
1189 break;
1190 case cpu_to_le16(IEEE80211_STYPE_BACK):
1191 stats->ctrl[CONTROL_BACK]++;
1192 break;
1193 case cpu_to_le16(IEEE80211_STYPE_PSPOLL):
1194 stats->ctrl[CONTROL_PSPOLL]++;
1195 break;
1196 case cpu_to_le16(IEEE80211_STYPE_RTS):
1197 stats->ctrl[CONTROL_RTS]++;
1198 break;
1199 case cpu_to_le16(IEEE80211_STYPE_CTS):
1200 stats->ctrl[CONTROL_CTS]++;
1201 break;
1202 case cpu_to_le16(IEEE80211_STYPE_ACK):
1203 stats->ctrl[CONTROL_ACK]++;
1204 break;
1205 case cpu_to_le16(IEEE80211_STYPE_CFEND):
1206 stats->ctrl[CONTROL_CFEND]++;
1207 break;
1208 case cpu_to_le16(IEEE80211_STYPE_CFENDACK):
1209 stats->ctrl[CONTROL_CFENDACK]++;
1210 break;
1211 }
1212 } else {
1213 /* data */
1214 stats->data_cnt++;
1215 stats->data_bytes += len;
1216 }
1217 }
1218 #endif
1219
1220 static void iwl_force_rf_reset(struct iwl_priv *priv)
1221 {
1222 if (test_bit(STATUS_EXIT_PENDING, &priv->shrd->status))
1223 return;
1224
1225 if (!iwl_is_any_associated(priv)) {
1226 IWL_DEBUG_SCAN(priv, "force reset rejected: not associated\n");
1227 return;
1228 }
1229 /*
1230 * There is no easy and better way to force reset the radio,
1231 * the only known method is switching channel which will force to
1232 * reset and tune the radio.
1233 * Use internal short scan (single channel) operation to should
1234 * achieve this objective.
1235 * Driver should reset the radio when number of consecutive missed
1236 * beacon, or any other uCode error condition detected.
1237 */
1238 IWL_DEBUG_INFO(priv, "perform radio reset.\n");
1239 iwl_internal_short_hw_scan(priv);
1240 }
1241
1242
1243 int iwl_force_reset(struct iwl_priv *priv, int mode, bool external)
1244 {
1245 struct iwl_force_reset *force_reset;
1246
1247 if (test_bit(STATUS_EXIT_PENDING, &priv->shrd->status))
1248 return -EINVAL;
1249
1250 if (mode >= IWL_MAX_FORCE_RESET) {
1251 IWL_DEBUG_INFO(priv, "invalid reset request.\n");
1252 return -EINVAL;
1253 }
1254 force_reset = &priv->force_reset[mode];
1255 force_reset->reset_request_count++;
1256 if (!external) {
1257 if (force_reset->last_force_reset_jiffies &&
1258 time_after(force_reset->last_force_reset_jiffies +
1259 force_reset->reset_duration, jiffies)) {
1260 IWL_DEBUG_INFO(priv, "force reset rejected\n");
1261 force_reset->reset_reject_count++;
1262 return -EAGAIN;
1263 }
1264 }
1265 force_reset->reset_success_count++;
1266 force_reset->last_force_reset_jiffies = jiffies;
1267 IWL_DEBUG_INFO(priv, "perform force reset (%d)\n", mode);
1268 switch (mode) {
1269 case IWL_RF_RESET:
1270 iwl_force_rf_reset(priv);
1271 break;
1272 case IWL_FW_RESET:
1273 /*
1274 * if the request is from external(ex: debugfs),
1275 * then always perform the request in regardless the module
1276 * parameter setting
1277 * if the request is from internal (uCode error or driver
1278 * detect failure), then fw_restart module parameter
1279 * need to be check before performing firmware reload
1280 */
1281 if (!external && !iwlagn_mod_params.restart_fw) {
1282 IWL_DEBUG_INFO(priv, "Cancel firmware reload based on "
1283 "module parameter setting\n");
1284 break;
1285 }
1286 IWL_ERR(priv, "On demand firmware reload\n");
1287 iwlagn_fw_error(priv, true);
1288 break;
1289 }
1290 return 0;
1291 }
1292
1293
1294 int iwl_cmd_echo_test(struct iwl_priv *priv)
1295 {
1296 int ret;
1297 struct iwl_host_cmd cmd = {
1298 .id = REPLY_ECHO,
1299 .len = { 0 },
1300 .flags = CMD_SYNC,
1301 };
1302
1303 ret = iwl_dvm_send_cmd(priv, &cmd);
1304 if (ret)
1305 IWL_ERR(priv, "echo testing fail: 0X%x\n", ret);
1306 else
1307 IWL_DEBUG_INFO(priv, "echo testing pass\n");
1308 return ret;
1309 }
1310
1311 static inline int iwl_check_stuck_queue(struct iwl_priv *priv, int txq)
1312 {
1313 if (iwl_trans_check_stuck_queue(trans(priv), txq)) {
1314 int ret;
1315 ret = iwl_force_reset(priv, IWL_FW_RESET, false);
1316 return (ret == -EAGAIN) ? 0 : 1;
1317 }
1318 return 0;
1319 }
1320
1321 /*
1322 * Making watchdog tick be a quarter of timeout assure we will
1323 * discover the queue hung between timeout and 1.25*timeout
1324 */
1325 #define IWL_WD_TICK(timeout) ((timeout) / 4)
1326
1327 /*
1328 * Watchdog timer callback, we check each tx queue for stuck, if if hung
1329 * we reset the firmware. If everything is fine just rearm the timer.
1330 */
1331 void iwl_bg_watchdog(unsigned long data)
1332 {
1333 struct iwl_priv *priv = (struct iwl_priv *)data;
1334 int cnt;
1335 unsigned long timeout;
1336
1337 if (test_bit(STATUS_EXIT_PENDING, &priv->shrd->status))
1338 return;
1339
1340 if (iwl_is_rfkill(priv->shrd))
1341 return;
1342
1343 timeout = cfg(priv)->base_params->wd_timeout;
1344 if (timeout == 0)
1345 return;
1346
1347 /* monitor and check for stuck queues */
1348 for (cnt = 0; cnt < hw_params(priv).max_txq_num; cnt++)
1349 if (iwl_check_stuck_queue(priv, cnt))
1350 return;
1351
1352 mod_timer(&priv->watchdog, jiffies +
1353 msecs_to_jiffies(IWL_WD_TICK(timeout)));
1354 }
1355
1356 void iwl_setup_watchdog(struct iwl_priv *priv)
1357 {
1358 unsigned int timeout = cfg(priv)->base_params->wd_timeout;
1359
1360 if (!iwlagn_mod_params.wd_disable) {
1361 /* use system default */
1362 if (timeout && !cfg(priv)->base_params->wd_disable)
1363 mod_timer(&priv->watchdog,
1364 jiffies +
1365 msecs_to_jiffies(IWL_WD_TICK(timeout)));
1366 else
1367 del_timer(&priv->watchdog);
1368 } else {
1369 /* module parameter overwrite default configuration */
1370 if (timeout && iwlagn_mod_params.wd_disable == 2)
1371 mod_timer(&priv->watchdog,
1372 jiffies +
1373 msecs_to_jiffies(IWL_WD_TICK(timeout)));
1374 else
1375 del_timer(&priv->watchdog);
1376 }
1377 }
1378
1379 /**
1380 * iwl_beacon_time_mask_low - mask of lower 32 bit of beacon time
1381 * @priv -- pointer to iwl_priv data structure
1382 * @tsf_bits -- number of bits need to shift for masking)
1383 */
1384 static inline u32 iwl_beacon_time_mask_low(struct iwl_priv *priv,
1385 u16 tsf_bits)
1386 {
1387 return (1 << tsf_bits) - 1;
1388 }
1389
1390 /**
1391 * iwl_beacon_time_mask_high - mask of higher 32 bit of beacon time
1392 * @priv -- pointer to iwl_priv data structure
1393 * @tsf_bits -- number of bits need to shift for masking)
1394 */
1395 static inline u32 iwl_beacon_time_mask_high(struct iwl_priv *priv,
1396 u16 tsf_bits)
1397 {
1398 return ((1 << (32 - tsf_bits)) - 1) << tsf_bits;
1399 }
1400
1401 /*
1402 * extended beacon time format
1403 * time in usec will be changed into a 32-bit value in extended:internal format
1404 * the extended part is the beacon counts
1405 * the internal part is the time in usec within one beacon interval
1406 */
1407 u32 iwl_usecs_to_beacons(struct iwl_priv *priv, u32 usec, u32 beacon_interval)
1408 {
1409 u32 quot;
1410 u32 rem;
1411 u32 interval = beacon_interval * TIME_UNIT;
1412
1413 if (!interval || !usec)
1414 return 0;
1415
1416 quot = (usec / interval) &
1417 (iwl_beacon_time_mask_high(priv, IWLAGN_EXT_BEACON_TIME_POS) >>
1418 IWLAGN_EXT_BEACON_TIME_POS);
1419 rem = (usec % interval) & iwl_beacon_time_mask_low(priv,
1420 IWLAGN_EXT_BEACON_TIME_POS);
1421
1422 return (quot << IWLAGN_EXT_BEACON_TIME_POS) + rem;
1423 }
1424
1425 /* base is usually what we get from ucode with each received frame,
1426 * the same as HW timer counter counting down
1427 */
1428 __le32 iwl_add_beacon_time(struct iwl_priv *priv, u32 base,
1429 u32 addon, u32 beacon_interval)
1430 {
1431 u32 base_low = base & iwl_beacon_time_mask_low(priv,
1432 IWLAGN_EXT_BEACON_TIME_POS);
1433 u32 addon_low = addon & iwl_beacon_time_mask_low(priv,
1434 IWLAGN_EXT_BEACON_TIME_POS);
1435 u32 interval = beacon_interval * TIME_UNIT;
1436 u32 res = (base & iwl_beacon_time_mask_high(priv,
1437 IWLAGN_EXT_BEACON_TIME_POS)) +
1438 (addon & iwl_beacon_time_mask_high(priv,
1439 IWLAGN_EXT_BEACON_TIME_POS));
1440
1441 if (base_low > addon_low)
1442 res += base_low - addon_low;
1443 else if (base_low < addon_low) {
1444 res += interval + base_low - addon_low;
1445 res += (1 << IWLAGN_EXT_BEACON_TIME_POS);
1446 } else
1447 res += (1 << IWLAGN_EXT_BEACON_TIME_POS);
1448
1449 return cpu_to_le32(res);
1450 }
1451
1452 void iwl_nic_error(struct iwl_op_mode *op_mode)
1453 {
1454 struct iwl_priv *priv = IWL_OP_MODE_GET_DVM(op_mode);
1455
1456 iwlagn_fw_error(priv, false);
1457 }
1458
1459 void iwl_set_hw_rfkill_state(struct iwl_op_mode *op_mode, bool state)
1460 {
1461 struct iwl_priv *priv = IWL_OP_MODE_GET_DVM(op_mode);
1462
1463 wiphy_rfkill_set_hw_state(priv->hw->wiphy, state);
1464 }
1465
1466 void iwl_nic_config(struct iwl_priv *priv)
1467 {
1468 cfg(priv)->lib->nic_config(priv);
1469 }
1470
1471 void iwl_free_skb(struct iwl_op_mode *op_mode, struct sk_buff *skb)
1472 {
1473 struct iwl_priv *priv = IWL_OP_MODE_GET_DVM(op_mode);
1474 struct ieee80211_tx_info *info;
1475
1476 info = IEEE80211_SKB_CB(skb);
1477 kmem_cache_free(priv->tx_cmd_pool, (info->driver_data[1]));
1478 dev_kfree_skb_any(skb);
1479 }
1480
1481 void iwl_stop_sw_queue(struct iwl_op_mode *op_mode, u8 ac)
1482 {
1483 struct iwl_priv *priv = IWL_OP_MODE_GET_DVM(op_mode);
1484
1485 ieee80211_stop_queue(priv->hw, ac);
1486 }
1487
1488 void iwl_wake_sw_queue(struct iwl_op_mode *op_mode, u8 ac)
1489 {
1490 struct iwl_priv *priv = IWL_OP_MODE_GET_DVM(op_mode);
1491
1492 ieee80211_wake_queue(priv->hw, ac);
1493 }
Linux kernel - Deliverables
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