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iwlagn: remove unused variable
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / net / wireless / iwlwifi / iwl-agn-rxon.c
blob02387430f7fe0dddae5006aa80e59301c19ecaec
1 /******************************************************************************
2 *
3 * Copyright(c) 2003 - 2011 Intel Corporation. All rights reserved.
4 *
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of version 2 of the GNU General Public License as
7 * published by the Free Software Foundation.
8 *
9 * This program is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
12 * more details.
13 *
14 * You should have received a copy of the GNU General Public License along with
15 * this program; if not, write to the Free Software Foundation, Inc.,
16 * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
17 *
18 * The full GNU General Public License is included in this distribution in the
19 * file called LICENSE.
20 *
21 * Contact Information:
22 * Intel Linux Wireless <ilw@linux.intel.com>
23 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
24 *
25 *****************************************************************************/
26
27 #include "iwl-dev.h"
28 #include "iwl-agn.h"
29 #include "iwl-sta.h"
30 #include "iwl-core.h"
31 #include "iwl-agn-calib.h"
32 #include "iwl-helpers.h"
33
34 static int iwlagn_disable_bss(struct iwl_priv *priv,
35 struct iwl_rxon_context *ctx,
36 struct iwl_rxon_cmd *send)
37 {
38 __le32 old_filter = send->filter_flags;
39 int ret;
40
41 send->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
42 ret = iwl_send_cmd_pdu(priv, ctx->rxon_cmd, sizeof(*send), send);
43
44 send->filter_flags = old_filter;
45
46 if (ret)
47 IWL_ERR(priv, "Error clearing ASSOC_MSK on BSS (%d)\n", ret);
48
49 return ret;
50 }
51
52 static int iwlagn_disable_pan(struct iwl_priv *priv,
53 struct iwl_rxon_context *ctx,
54 struct iwl_rxon_cmd *send)
55 {
56 struct iwl_notification_wait disable_wait;
57 __le32 old_filter = send->filter_flags;
58 u8 old_dev_type = send->dev_type;
59 int ret;
60
61 iwlagn_init_notification_wait(priv, &disable_wait,
62 REPLY_WIPAN_DEACTIVATION_COMPLETE,
63 NULL, NULL);
64
65 send->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
66 send->dev_type = RXON_DEV_TYPE_P2P;
67 ret = iwl_send_cmd_pdu(priv, ctx->rxon_cmd, sizeof(*send), send);
68
69 send->filter_flags = old_filter;
70 send->dev_type = old_dev_type;
71
72 if (ret) {
73 IWL_ERR(priv, "Error disabling PAN (%d)\n", ret);
74 iwlagn_remove_notification(priv, &disable_wait);
75 } else {
76 ret = iwlagn_wait_notification(priv, &disable_wait, HZ);
77 if (ret)
78 IWL_ERR(priv, "Timed out waiting for PAN disable\n");
79 }
80
81 return ret;
82 }
83
84 static void iwlagn_update_qos(struct iwl_priv *priv,
85 struct iwl_rxon_context *ctx)
86 {
87 int ret;
88
89 if (!ctx->is_active)
90 return;
91
92 ctx->qos_data.def_qos_parm.qos_flags = 0;
93
94 if (ctx->qos_data.qos_active)
95 ctx->qos_data.def_qos_parm.qos_flags |=
96 QOS_PARAM_FLG_UPDATE_EDCA_MSK;
97
98 if (ctx->ht.enabled)
99 ctx->qos_data.def_qos_parm.qos_flags |= QOS_PARAM_FLG_TGN_MSK;
100
101 IWL_DEBUG_QOS(priv, "send QoS cmd with Qos active=%d FLAGS=0x%X\n",
102 ctx->qos_data.qos_active,
103 ctx->qos_data.def_qos_parm.qos_flags);
104
105 ret = iwl_send_cmd_pdu(priv, ctx->qos_cmd,
106 sizeof(struct iwl_qosparam_cmd),
107 &ctx->qos_data.def_qos_parm);
108 if (ret)
109 IWL_ERR(priv, "Failed to update QoS\n");
110 }
111
112 static int iwlagn_update_beacon(struct iwl_priv *priv,
113 struct ieee80211_vif *vif)
114 {
115 lockdep_assert_held(&priv->mutex);
116
117 dev_kfree_skb(priv->beacon_skb);
118 priv->beacon_skb = ieee80211_beacon_get(priv->hw, vif);
119 if (!priv->beacon_skb)
120 return -ENOMEM;
121 return iwlagn_send_beacon_cmd(priv);
122 }
123
124 static int iwlagn_send_rxon_assoc(struct iwl_priv *priv,
125 struct iwl_rxon_context *ctx)
126 {
127 int ret = 0;
128 struct iwl_rxon_assoc_cmd rxon_assoc;
129 const struct iwl_rxon_cmd *rxon1 = &ctx->staging;
130 const struct iwl_rxon_cmd *rxon2 = &ctx->active;
131
132 if ((rxon1->flags == rxon2->flags) &&
133 (rxon1->filter_flags == rxon2->filter_flags) &&
134 (rxon1->cck_basic_rates == rxon2->cck_basic_rates) &&
135 (rxon1->ofdm_ht_single_stream_basic_rates ==
136 rxon2->ofdm_ht_single_stream_basic_rates) &&
137 (rxon1->ofdm_ht_dual_stream_basic_rates ==
138 rxon2->ofdm_ht_dual_stream_basic_rates) &&
139 (rxon1->ofdm_ht_triple_stream_basic_rates ==
140 rxon2->ofdm_ht_triple_stream_basic_rates) &&
141 (rxon1->acquisition_data == rxon2->acquisition_data) &&
142 (rxon1->rx_chain == rxon2->rx_chain) &&
143 (rxon1->ofdm_basic_rates == rxon2->ofdm_basic_rates)) {
144 IWL_DEBUG_INFO(priv, "Using current RXON_ASSOC. Not resending.\n");
145 return 0;
146 }
147
148 rxon_assoc.flags = ctx->staging.flags;
149 rxon_assoc.filter_flags = ctx->staging.filter_flags;
150 rxon_assoc.ofdm_basic_rates = ctx->staging.ofdm_basic_rates;
151 rxon_assoc.cck_basic_rates = ctx->staging.cck_basic_rates;
152 rxon_assoc.reserved1 = 0;
153 rxon_assoc.reserved2 = 0;
154 rxon_assoc.reserved3 = 0;
155 rxon_assoc.ofdm_ht_single_stream_basic_rates =
156 ctx->staging.ofdm_ht_single_stream_basic_rates;
157 rxon_assoc.ofdm_ht_dual_stream_basic_rates =
158 ctx->staging.ofdm_ht_dual_stream_basic_rates;
159 rxon_assoc.rx_chain_select_flags = ctx->staging.rx_chain;
160 rxon_assoc.ofdm_ht_triple_stream_basic_rates =
161 ctx->staging.ofdm_ht_triple_stream_basic_rates;
162 rxon_assoc.acquisition_data = ctx->staging.acquisition_data;
163
164 ret = iwl_send_cmd_pdu_async(priv, ctx->rxon_assoc_cmd,
165 sizeof(rxon_assoc), &rxon_assoc, NULL);
166 if (ret)
167 return ret;
168
169 return ret;
170 }
171
172 static int iwlagn_rxon_disconn(struct iwl_priv *priv,
173 struct iwl_rxon_context *ctx)
174 {
175 int ret;
176 struct iwl_rxon_cmd *active = (void *)&ctx->active;
177
178 if (ctx->ctxid == IWL_RXON_CTX_BSS)
179 ret = iwlagn_disable_bss(priv, ctx, &ctx->staging);
180 else
181 ret = iwlagn_disable_pan(priv, ctx, &ctx->staging);
182 if (ret)
183 return ret;
184
185 /*
186 * Un-assoc RXON clears the station table and WEP
187 * keys, so we have to restore those afterwards.
188 */
189 iwl_clear_ucode_stations(priv, ctx);
190 iwl_restore_stations(priv, ctx);
191 ret = iwl_restore_default_wep_keys(priv, ctx);
192 if (ret) {
193 IWL_ERR(priv, "Failed to restore WEP keys (%d)\n", ret);
194 return ret;
195 }
196
197 memcpy(active, &ctx->staging, sizeof(*active));
198 return 0;
199 }
200
201 static int iwlagn_rxon_connect(struct iwl_priv *priv,
202 struct iwl_rxon_context *ctx)
203 {
204 int ret;
205 struct iwl_rxon_cmd *active = (void *)&ctx->active;
206
207 /* RXON timing must be before associated RXON */
208 ret = iwl_send_rxon_timing(priv, ctx);
209 if (ret) {
210 IWL_ERR(priv, "Failed to send timing (%d)!\n", ret);
211 return ret;
212 }
213 /* QoS info may be cleared by previous un-assoc RXON */
214 iwlagn_update_qos(priv, ctx);
215
216 /*
217 * We'll run into this code path when beaconing is
218 * enabled, but then we also need to send the beacon
219 * to the device.
220 */
221 if (ctx->vif && (ctx->vif->type == NL80211_IFTYPE_AP)) {
222 ret = iwlagn_update_beacon(priv, ctx->vif);
223 if (ret) {
224 IWL_ERR(priv,
225 "Error sending required beacon (%d)!\n",
226 ret);
227 return ret;
228 }
229 }
230
231 priv->start_calib = 0;
232 /*
233 * Apply the new configuration.
234 *
235 * Associated RXON doesn't clear the station table in uCode,
236 * so we don't need to restore stations etc. after this.
237 */
238 ret = iwl_send_cmd_pdu(priv, ctx->rxon_cmd,
239 sizeof(struct iwl_rxon_cmd), &ctx->staging);
240 if (ret) {
241 IWL_ERR(priv, "Error setting new RXON (%d)\n", ret);
242 return ret;
243 }
244 memcpy(active, &ctx->staging, sizeof(*active));
245
246 iwl_reprogram_ap_sta(priv, ctx);
247
248 /* IBSS beacon needs to be sent after setting assoc */
249 if (ctx->vif && (ctx->vif->type == NL80211_IFTYPE_ADHOC))
250 if (iwlagn_update_beacon(priv, ctx->vif))
251 IWL_ERR(priv, "Error sending IBSS beacon\n");
252 iwl_init_sensitivity(priv);
253
254 /*
255 * If we issue a new RXON command which required a tune then
256 * we must send a new TXPOWER command or we won't be able to
257 * Tx any frames.
258 *
259 * It's expected we set power here if channel is changing.
260 */
261 ret = iwl_set_tx_power(priv, priv->tx_power_next, true);
262 if (ret) {
263 IWL_ERR(priv, "Error sending TX power (%d)\n", ret);
264 return ret;
265 }
266 return 0;
267 }
268
269 /**
270 * iwlagn_commit_rxon - commit staging_rxon to hardware
271 *
272 * The RXON command in staging_rxon is committed to the hardware and
273 * the active_rxon structure is updated with the new data. This
274 * function correctly transitions out of the RXON_ASSOC_MSK state if
275 * a HW tune is required based on the RXON structure changes.
276 *
277 * The connect/disconnect flow should be as the following:
278 *
279 * 1. make sure send RXON command with association bit unset if not connect
280 * this should include the channel and the band for the candidate
281 * to be connected to
282 * 2. Add Station before RXON association with the AP
283 * 3. RXON_timing has to send before RXON for connection
284 * 4. full RXON command - associated bit set
285 * 5. use RXON_ASSOC command to update any flags changes
286 */
287 int iwlagn_commit_rxon(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
288 {
289 /* cast away the const for active_rxon in this function */
290 struct iwl_rxon_cmd *active = (void *)&ctx->active;
291 bool new_assoc = !!(ctx->staging.filter_flags & RXON_FILTER_ASSOC_MSK);
292 bool old_assoc = !!(ctx->active.filter_flags & RXON_FILTER_ASSOC_MSK);
293 int ret;
294
295 lockdep_assert_held(&priv->mutex);
296
297 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
298 return -EINVAL;
299
300 if (!iwl_is_alive(priv))
301 return -EBUSY;
302
303 /* This function hardcodes a bunch of dual-mode assumptions */
304 BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
305
306 if (!ctx->is_active)
307 return 0;
308
309 /* always get timestamp with Rx frame */
310 ctx->staging.flags |= RXON_FLG_TSF2HOST_MSK;
311
312 if (ctx->ctxid == IWL_RXON_CTX_PAN && priv->_agn.hw_roc_channel) {
313 struct ieee80211_channel *chan = priv->_agn.hw_roc_channel;
314
315 iwl_set_rxon_channel(priv, chan, ctx);
316 iwl_set_flags_for_band(priv, ctx, chan->band, NULL);
317 ctx->staging.filter_flags |=
318 RXON_FILTER_ASSOC_MSK |
319 RXON_FILTER_PROMISC_MSK |
320 RXON_FILTER_CTL2HOST_MSK;
321 ctx->staging.dev_type = RXON_DEV_TYPE_P2P;
322 new_assoc = true;
323
324 if (memcmp(&ctx->staging, &ctx->active,
325 sizeof(ctx->staging)) == 0)
326 return 0;
327 }
328
329 if ((ctx->vif && ctx->vif->bss_conf.use_short_slot) ||
330 !(ctx->staging.flags & RXON_FLG_BAND_24G_MSK))
331 ctx->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
332 else
333 ctx->staging.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
334
335 iwl_print_rx_config_cmd(priv, ctx);
336 ret = iwl_check_rxon_cmd(priv, ctx);
337 if (ret) {
338 IWL_ERR(priv, "Invalid RXON configuration. Not committing.\n");
339 return -EINVAL;
340 }
341
342 /*
343 * receive commit_rxon request
344 * abort any previous channel switch if still in process
345 */
346 if (priv->switch_rxon.switch_in_progress &&
347 (priv->switch_rxon.channel != ctx->staging.channel)) {
348 IWL_DEBUG_11H(priv, "abort channel switch on %d\n",
349 le16_to_cpu(priv->switch_rxon.channel));
350 iwl_chswitch_done(priv, false);
351 }
352
353 /*
354 * If we don't need to send a full RXON, we can use
355 * iwl_rxon_assoc_cmd which is used to reconfigure filter
356 * and other flags for the current radio configuration.
357 */
358 if (!iwl_full_rxon_required(priv, ctx)) {
359 ret = iwlagn_send_rxon_assoc(priv, ctx);
360 if (ret) {
361 IWL_ERR(priv, "Error setting RXON_ASSOC (%d)\n", ret);
362 return ret;
363 }
364
365 memcpy(active, &ctx->staging, sizeof(*active));
366 return 0;
367 }
368
369 if (priv->cfg->ops->hcmd->set_pan_params) {
370 ret = priv->cfg->ops->hcmd->set_pan_params(priv);
371 if (ret)
372 return ret;
373 }
374
375 iwl_set_rxon_hwcrypto(priv, ctx, !iwlagn_mod_params.sw_crypto);
376
377 IWL_DEBUG_INFO(priv,
378 "Going to commit RXON\n"
379 " * with%s RXON_FILTER_ASSOC_MSK\n"
380 " * channel = %d\n"
381 " * bssid = %pM\n",
382 (new_assoc ? "" : "out"),
383 le16_to_cpu(ctx->staging.channel),
384 ctx->staging.bssid_addr);
385
386 /*
387 * Always clear associated first, but with the correct config.
388 * This is required as for example station addition for the
389 * AP station must be done after the BSSID is set to correctly
390 * set up filters in the device.
391 */
392 if ((old_assoc && new_assoc) || !new_assoc) {
393 ret = iwlagn_rxon_disconn(priv, ctx);
394 if (ret)
395 return ret;
396 }
397
398 if (new_assoc)
399 return iwlagn_rxon_connect(priv, ctx);
400
401 return 0;
402 }
403
404 int iwlagn_mac_config(struct ieee80211_hw *hw, u32 changed)
405 {
406 struct iwl_priv *priv = hw->priv;
407 struct iwl_rxon_context *ctx;
408 struct ieee80211_conf *conf = &hw->conf;
409 struct ieee80211_channel *channel = conf->channel;
410 const struct iwl_channel_info *ch_info;
411 int ret = 0;
412
413 IWL_DEBUG_MAC80211(priv, "changed %#x", changed);
414
415 mutex_lock(&priv->mutex);
416
417 if (unlikely(test_bit(STATUS_SCANNING, &priv->status))) {
418 IWL_DEBUG_MAC80211(priv, "leave - scanning\n");
419 goto out;
420 }
421
422 if (!iwl_is_ready(priv)) {
423 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
424 goto out;
425 }
426
427 if (changed & (IEEE80211_CONF_CHANGE_SMPS |
428 IEEE80211_CONF_CHANGE_CHANNEL)) {
429 /* mac80211 uses static for non-HT which is what we want */
430 priv->current_ht_config.smps = conf->smps_mode;
431
432 /*
433 * Recalculate chain counts.
434 *
435 * If monitor mode is enabled then mac80211 will
436 * set up the SM PS mode to OFF if an HT channel is
437 * configured.
438 */
439 if (priv->cfg->ops->hcmd->set_rxon_chain)
440 for_each_context(priv, ctx)
441 priv->cfg->ops->hcmd->set_rxon_chain(priv, ctx);
442 }
443
444 if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
445 unsigned long flags;
446
447 ch_info = iwl_get_channel_info(priv, channel->band,
448 channel->hw_value);
449 if (!is_channel_valid(ch_info)) {
450 IWL_DEBUG_MAC80211(priv, "leave - invalid channel\n");
451 ret = -EINVAL;
452 goto out;
453 }
454
455 spin_lock_irqsave(&priv->lock, flags);
456
457 for_each_context(priv, ctx) {
458 /* Configure HT40 channels */
459 if (ctx->ht.enabled != conf_is_ht(conf))
460 ctx->ht.enabled = conf_is_ht(conf);
461
462 if (ctx->ht.enabled) {
463 if (conf_is_ht40_minus(conf)) {
464 ctx->ht.extension_chan_offset =
465 IEEE80211_HT_PARAM_CHA_SEC_BELOW;
466 ctx->ht.is_40mhz = true;
467 } else if (conf_is_ht40_plus(conf)) {
468 ctx->ht.extension_chan_offset =
469 IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
470 ctx->ht.is_40mhz = true;
471 } else {
472 ctx->ht.extension_chan_offset =
473 IEEE80211_HT_PARAM_CHA_SEC_NONE;
474 ctx->ht.is_40mhz = false;
475 }
476 } else
477 ctx->ht.is_40mhz = false;
478
479 /*
480 * Default to no protection. Protection mode will
481 * later be set from BSS config in iwl_ht_conf
482 */
483 ctx->ht.protection = IEEE80211_HT_OP_MODE_PROTECTION_NONE;
484
485 /* if we are switching from ht to 2.4 clear flags
486 * from any ht related info since 2.4 does not
487 * support ht */
488 if (le16_to_cpu(ctx->staging.channel) !=
489 channel->hw_value)
490 ctx->staging.flags = 0;
491
492 iwl_set_rxon_channel(priv, channel, ctx);
493 iwl_set_rxon_ht(priv, &priv->current_ht_config);
494
495 iwl_set_flags_for_band(priv, ctx, channel->band,
496 ctx->vif);
497 }
498
499 spin_unlock_irqrestore(&priv->lock, flags);
500
501 iwl_update_bcast_stations(priv);
502
503 /*
504 * The list of supported rates and rate mask can be different
505 * for each band; since the band may have changed, reset
506 * the rate mask to what mac80211 lists.
507 */
508 iwl_set_rate(priv);
509 }
510
511 if (changed & (IEEE80211_CONF_CHANGE_PS |
512 IEEE80211_CONF_CHANGE_IDLE)) {
513 ret = iwl_power_update_mode(priv, false);
514 if (ret)
515 IWL_DEBUG_MAC80211(priv, "Error setting sleep level\n");
516 }
517
518 if (changed & IEEE80211_CONF_CHANGE_POWER) {
519 IWL_DEBUG_MAC80211(priv, "TX Power old=%d new=%d\n",
520 priv->tx_power_user_lmt, conf->power_level);
521
522 iwl_set_tx_power(priv, conf->power_level, false);
523 }
524
525 for_each_context(priv, ctx) {
526 if (!memcmp(&ctx->staging, &ctx->active, sizeof(ctx->staging)))
527 continue;
528 iwlagn_commit_rxon(priv, ctx);
529 }
530 out:
531 mutex_unlock(&priv->mutex);
532 return ret;
533 }
534
535 static void iwlagn_check_needed_chains(struct iwl_priv *priv,
536 struct iwl_rxon_context *ctx,
537 struct ieee80211_bss_conf *bss_conf)
538 {
539 struct ieee80211_vif *vif = ctx->vif;
540 struct iwl_rxon_context *tmp;
541 struct ieee80211_sta *sta;
542 struct iwl_ht_config *ht_conf = &priv->current_ht_config;
543 struct ieee80211_sta_ht_cap *ht_cap;
544 bool need_multiple;
545
546 lockdep_assert_held(&priv->mutex);
547
548 switch (vif->type) {
549 case NL80211_IFTYPE_STATION:
550 rcu_read_lock();
551 sta = ieee80211_find_sta(vif, bss_conf->bssid);
552 if (!sta) {
553 /*
554 * If at all, this can only happen through a race
555 * when the AP disconnects us while we're still
556 * setting up the connection, in that case mac80211
557 * will soon tell us about that.
558 */
559 need_multiple = false;
560 rcu_read_unlock();
561 break;
562 }
563
564 ht_cap = &sta->ht_cap;
565
566 need_multiple = true;
567
568 /*
569 * If the peer advertises no support for receiving 2 and 3
570 * stream MCS rates, it can't be transmitting them either.
571 */
572 if (ht_cap->mcs.rx_mask[1] == 0 &&
573 ht_cap->mcs.rx_mask[2] == 0) {
574 need_multiple = false;
575 } else if (!(ht_cap->mcs.tx_params &
576 IEEE80211_HT_MCS_TX_DEFINED)) {
577 /* If it can't TX MCS at all ... */
578 need_multiple = false;
579 } else if (ht_cap->mcs.tx_params &
580 IEEE80211_HT_MCS_TX_RX_DIFF) {
581 int maxstreams;
582
583 /*
584 * But if it can receive them, it might still not
585 * be able to transmit them, which is what we need
586 * to check here -- so check the number of streams
587 * it advertises for TX (if different from RX).
588 */
589
590 maxstreams = (ht_cap->mcs.tx_params &
591 IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK);
592 maxstreams >>=
593 IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT;
594 maxstreams += 1;
595
596 if (maxstreams <= 1)
597 need_multiple = false;
598 }
599
600 rcu_read_unlock();
601 break;
602 case NL80211_IFTYPE_ADHOC:
603 /* currently */
604 need_multiple = false;
605 break;
606 default:
607 /* only AP really */
608 need_multiple = true;
609 break;
610 }
611
612 ctx->ht_need_multiple_chains = need_multiple;
613
614 if (!need_multiple) {
615 /* check all contexts */
616 for_each_context(priv, tmp) {
617 if (!tmp->vif)
618 continue;
619 if (tmp->ht_need_multiple_chains) {
620 need_multiple = true;
621 break;
622 }
623 }
624 }
625
626 ht_conf->single_chain_sufficient = !need_multiple;
627 }
628
629 void iwlagn_bss_info_changed(struct ieee80211_hw *hw,
630 struct ieee80211_vif *vif,
631 struct ieee80211_bss_conf *bss_conf,
632 u32 changes)
633 {
634 struct iwl_priv *priv = hw->priv;
635 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
636 int ret;
637 bool force = false;
638
639 mutex_lock(&priv->mutex);
640
641 if (unlikely(!iwl_is_ready(priv))) {
642 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
643 mutex_unlock(&priv->mutex);
644 return;
645 }
646
647 if (unlikely(!ctx->vif)) {
648 IWL_DEBUG_MAC80211(priv, "leave - vif is NULL\n");
649 mutex_unlock(&priv->mutex);
650 return;
651 }
652
653 if (changes & BSS_CHANGED_BEACON_INT)
654 force = true;
655
656 if (changes & BSS_CHANGED_QOS) {
657 ctx->qos_data.qos_active = bss_conf->qos;
658 iwlagn_update_qos(priv, ctx);
659 }
660
661 ctx->staging.assoc_id = cpu_to_le16(vif->bss_conf.aid);
662 if (vif->bss_conf.use_short_preamble)
663 ctx->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
664 else
665 ctx->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
666
667 if (changes & BSS_CHANGED_ASSOC) {
668 if (bss_conf->assoc) {
669 priv->timestamp = bss_conf->timestamp;
670 ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
671 } else {
672 /*
673 * If we disassociate while there are pending
674 * frames, just wake up the queues and let the
675 * frames "escape" ... This shouldn't really
676 * be happening to start with, but we should
677 * not get stuck in this case either since it
678 * can happen if userspace gets confused.
679 */
680 if (ctx->last_tx_rejected) {
681 ctx->last_tx_rejected = false;
682 iwl_wake_any_queue(priv, ctx);
683 }
684 ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
685 }
686 }
687
688 if (ctx->ht.enabled) {
689 ctx->ht.protection = bss_conf->ht_operation_mode &
690 IEEE80211_HT_OP_MODE_PROTECTION;
691 ctx->ht.non_gf_sta_present = !!(bss_conf->ht_operation_mode &
692 IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT);
693 iwlagn_check_needed_chains(priv, ctx, bss_conf);
694 iwl_set_rxon_ht(priv, &priv->current_ht_config);
695 }
696
697 if (priv->cfg->ops->hcmd->set_rxon_chain)
698 priv->cfg->ops->hcmd->set_rxon_chain(priv, ctx);
699
700 if (bss_conf->use_cts_prot && (priv->band != IEEE80211_BAND_5GHZ))
701 ctx->staging.flags |= RXON_FLG_TGG_PROTECT_MSK;
702 else
703 ctx->staging.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
704
705 if (bss_conf->use_cts_prot)
706 ctx->staging.flags |= RXON_FLG_SELF_CTS_EN;
707 else
708 ctx->staging.flags &= ~RXON_FLG_SELF_CTS_EN;
709
710 memcpy(ctx->staging.bssid_addr, bss_conf->bssid, ETH_ALEN);
711
712 if (vif->type == NL80211_IFTYPE_AP ||
713 vif->type == NL80211_IFTYPE_ADHOC) {
714 if (vif->bss_conf.enable_beacon) {
715 ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
716 priv->beacon_ctx = ctx;
717 } else {
718 ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
719 priv->beacon_ctx = NULL;
720 }
721 }
722
723 if (force || memcmp(&ctx->staging, &ctx->active, sizeof(ctx->staging)))
724 iwlagn_commit_rxon(priv, ctx);
725
726 if (changes & BSS_CHANGED_ASSOC && bss_conf->assoc) {
727 /*
728 * The chain noise calibration will enable PM upon
729 * completion. If calibration has already been run
730 * then we need to enable power management here.
731 */
732 if (priv->chain_noise_data.state == IWL_CHAIN_NOISE_DONE)
733 iwl_power_update_mode(priv, false);
734
735 /* Enable RX differential gain and sensitivity calibrations */
736 iwl_chain_noise_reset(priv);
737 priv->start_calib = 1;
738 }
739
740 if (changes & BSS_CHANGED_IBSS) {
741 ret = iwlagn_manage_ibss_station(priv, vif,
742 bss_conf->ibss_joined);
743 if (ret)
744 IWL_ERR(priv, "failed to %s IBSS station %pM\n",
745 bss_conf->ibss_joined ? "add" : "remove",
746 bss_conf->bssid);
747 }
748
749 if (changes & BSS_CHANGED_BEACON && vif->type == NL80211_IFTYPE_ADHOC &&
750 priv->beacon_ctx) {
751 if (iwlagn_update_beacon(priv, vif))
752 IWL_ERR(priv, "Error sending IBSS beacon\n");
753 }
754
755 mutex_unlock(&priv->mutex);
756 }
757
758 void iwlagn_post_scan(struct iwl_priv *priv)
759 {
760 struct iwl_rxon_context *ctx;
761
762 /*
763 * Since setting the RXON may have been deferred while
764 * performing the scan, fire one off if needed
765 */
766 for_each_context(priv, ctx)
767 if (memcmp(&ctx->staging, &ctx->active, sizeof(ctx->staging)))
768 iwlagn_commit_rxon(priv, ctx);
769
770 if (priv->cfg->ops->hcmd->set_pan_params)
771 priv->cfg->ops->hcmd->set_pan_params(priv);
772 }
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree