?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
iwlagn: fix channel switch locking
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / net / wireless / iwlwifi / iwl-agn-rxon.c
blob2532c7db3aff29946a3dcd8950086a604d393bde
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 int ret;
293
294 lockdep_assert_held(&priv->mutex);
295
296 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
297 return -EINVAL;
298
299 if (!iwl_is_alive(priv))
300 return -EBUSY;
301
302 /* This function hardcodes a bunch of dual-mode assumptions */
303 BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
304
305 if (!ctx->is_active)
306 return 0;
307
308 /* always get timestamp with Rx frame */
309 ctx->staging.flags |= RXON_FLG_TSF2HOST_MSK;
310
311 if (ctx->ctxid == IWL_RXON_CTX_PAN && priv->_agn.hw_roc_channel) {
312 struct ieee80211_channel *chan = priv->_agn.hw_roc_channel;
313
314 iwl_set_rxon_channel(priv, chan, ctx);
315 iwl_set_flags_for_band(priv, ctx, chan->band, NULL);
316 ctx->staging.filter_flags |=
317 RXON_FILTER_ASSOC_MSK |
318 RXON_FILTER_PROMISC_MSK |
319 RXON_FILTER_CTL2HOST_MSK;
320 ctx->staging.dev_type = RXON_DEV_TYPE_P2P;
321 new_assoc = true;
322
323 if (memcmp(&ctx->staging, &ctx->active,
324 sizeof(ctx->staging)) == 0)
325 return 0;
326 }
327
328 if ((ctx->vif && ctx->vif->bss_conf.use_short_slot) ||
329 !(ctx->staging.flags & RXON_FLG_BAND_24G_MSK))
330 ctx->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
331 else
332 ctx->staging.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
333
334 iwl_print_rx_config_cmd(priv, ctx);
335 ret = iwl_check_rxon_cmd(priv, ctx);
336 if (ret) {
337 IWL_ERR(priv, "Invalid RXON configuration. Not committing.\n");
338 return -EINVAL;
339 }
340
341 /*
342 * receive commit_rxon request
343 * abort any previous channel switch if still in process
344 */
345 if (test_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status) &&
346 (priv->switch_channel != ctx->staging.channel)) {
347 IWL_DEBUG_11H(priv, "abort channel switch on %d\n",
348 le16_to_cpu(priv->switch_channel));
349 iwl_chswitch_done(priv, false);
350 }
351
352 /*
353 * If we don't need to send a full RXON, we can use
354 * iwl_rxon_assoc_cmd which is used to reconfigure filter
355 * and other flags for the current radio configuration.
356 */
357 if (!iwl_full_rxon_required(priv, ctx)) {
358 ret = iwlagn_send_rxon_assoc(priv, ctx);
359 if (ret) {
360 IWL_ERR(priv, "Error setting RXON_ASSOC (%d)\n", ret);
361 return ret;
362 }
363
364 memcpy(active, &ctx->staging, sizeof(*active));
365 return 0;
366 }
367
368 if (priv->cfg->ops->hcmd->set_pan_params) {
369 ret = priv->cfg->ops->hcmd->set_pan_params(priv);
370 if (ret)
371 return ret;
372 }
373
374 iwl_set_rxon_hwcrypto(priv, ctx, !iwlagn_mod_params.sw_crypto);
375
376 IWL_DEBUG_INFO(priv,
377 "Going to commit RXON\n"
378 " * with%s RXON_FILTER_ASSOC_MSK\n"
379 " * channel = %d\n"
380 " * bssid = %pM\n",
381 (new_assoc ? "" : "out"),
382 le16_to_cpu(ctx->staging.channel),
383 ctx->staging.bssid_addr);
384
385 /*
386 * Always clear associated first, but with the correct config.
387 * This is required as for example station addition for the
388 * AP station must be done after the BSSID is set to correctly
389 * set up filters in the device.
390 */
391 ret = iwlagn_rxon_disconn(priv, ctx);
392 if (ret)
393 return ret;
394
395 if (new_assoc)
396 return iwlagn_rxon_connect(priv, ctx);
397
398 return 0;
399 }
400
401 int iwlagn_mac_config(struct ieee80211_hw *hw, u32 changed)
402 {
403 struct iwl_priv *priv = hw->priv;
404 struct iwl_rxon_context *ctx;
405 struct ieee80211_conf *conf = &hw->conf;
406 struct ieee80211_channel *channel = conf->channel;
407 const struct iwl_channel_info *ch_info;
408 int ret = 0;
409
410 IWL_DEBUG_MAC80211(priv, "changed %#x", changed);
411
412 mutex_lock(&priv->mutex);
413
414 if (unlikely(test_bit(STATUS_SCANNING, &priv->status))) {
415 IWL_DEBUG_MAC80211(priv, "leave - scanning\n");
416 goto out;
417 }
418
419 if (!iwl_is_ready(priv)) {
420 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
421 goto out;
422 }
423
424 if (changed & (IEEE80211_CONF_CHANGE_SMPS |
425 IEEE80211_CONF_CHANGE_CHANNEL)) {
426 /* mac80211 uses static for non-HT which is what we want */
427 priv->current_ht_config.smps = conf->smps_mode;
428
429 /*
430 * Recalculate chain counts.
431 *
432 * If monitor mode is enabled then mac80211 will
433 * set up the SM PS mode to OFF if an HT channel is
434 * configured.
435 */
436 if (priv->cfg->ops->hcmd->set_rxon_chain)
437 for_each_context(priv, ctx)
438 priv->cfg->ops->hcmd->set_rxon_chain(priv, ctx);
439 }
440
441 if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
442 unsigned long flags;
443
444 ch_info = iwl_get_channel_info(priv, channel->band,
445 channel->hw_value);
446 if (!is_channel_valid(ch_info)) {
447 IWL_DEBUG_MAC80211(priv, "leave - invalid channel\n");
448 ret = -EINVAL;
449 goto out;
450 }
451
452 spin_lock_irqsave(&priv->lock, flags);
453
454 for_each_context(priv, ctx) {
455 /* Configure HT40 channels */
456 if (ctx->ht.enabled != conf_is_ht(conf))
457 ctx->ht.enabled = conf_is_ht(conf);
458
459 if (ctx->ht.enabled) {
460 if (conf_is_ht40_minus(conf)) {
461 ctx->ht.extension_chan_offset =
462 IEEE80211_HT_PARAM_CHA_SEC_BELOW;
463 ctx->ht.is_40mhz = true;
464 } else if (conf_is_ht40_plus(conf)) {
465 ctx->ht.extension_chan_offset =
466 IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
467 ctx->ht.is_40mhz = true;
468 } else {
469 ctx->ht.extension_chan_offset =
470 IEEE80211_HT_PARAM_CHA_SEC_NONE;
471 ctx->ht.is_40mhz = false;
472 }
473 } else
474 ctx->ht.is_40mhz = false;
475
476 /*
477 * Default to no protection. Protection mode will
478 * later be set from BSS config in iwl_ht_conf
479 */
480 ctx->ht.protection = IEEE80211_HT_OP_MODE_PROTECTION_NONE;
481
482 /* if we are switching from ht to 2.4 clear flags
483 * from any ht related info since 2.4 does not
484 * support ht */
485 if (le16_to_cpu(ctx->staging.channel) !=
486 channel->hw_value)
487 ctx->staging.flags = 0;
488
489 iwl_set_rxon_channel(priv, channel, ctx);
490 iwl_set_rxon_ht(priv, &priv->current_ht_config);
491
492 iwl_set_flags_for_band(priv, ctx, channel->band,
493 ctx->vif);
494 }
495
496 spin_unlock_irqrestore(&priv->lock, flags);
497
498 iwl_update_bcast_stations(priv);
499
500 /*
501 * The list of supported rates and rate mask can be different
502 * for each band; since the band may have changed, reset
503 * the rate mask to what mac80211 lists.
504 */
505 iwl_set_rate(priv);
506 }
507
508 if (changed & (IEEE80211_CONF_CHANGE_PS |
509 IEEE80211_CONF_CHANGE_IDLE)) {
510 ret = iwl_power_update_mode(priv, false);
511 if (ret)
512 IWL_DEBUG_MAC80211(priv, "Error setting sleep level\n");
513 }
514
515 if (changed & IEEE80211_CONF_CHANGE_POWER) {
516 IWL_DEBUG_MAC80211(priv, "TX Power old=%d new=%d\n",
517 priv->tx_power_user_lmt, conf->power_level);
518
519 iwl_set_tx_power(priv, conf->power_level, false);
520 }
521
522 for_each_context(priv, ctx) {
523 if (!memcmp(&ctx->staging, &ctx->active, sizeof(ctx->staging)))
524 continue;
525 iwlagn_commit_rxon(priv, ctx);
526 }
527 out:
528 mutex_unlock(&priv->mutex);
529 return ret;
530 }
531
532 static void iwlagn_check_needed_chains(struct iwl_priv *priv,
533 struct iwl_rxon_context *ctx,
534 struct ieee80211_bss_conf *bss_conf)
535 {
536 struct ieee80211_vif *vif = ctx->vif;
537 struct iwl_rxon_context *tmp;
538 struct ieee80211_sta *sta;
539 struct iwl_ht_config *ht_conf = &priv->current_ht_config;
540 struct ieee80211_sta_ht_cap *ht_cap;
541 bool need_multiple;
542
543 lockdep_assert_held(&priv->mutex);
544
545 switch (vif->type) {
546 case NL80211_IFTYPE_STATION:
547 rcu_read_lock();
548 sta = ieee80211_find_sta(vif, bss_conf->bssid);
549 if (!sta) {
550 /*
551 * If at all, this can only happen through a race
552 * when the AP disconnects us while we're still
553 * setting up the connection, in that case mac80211
554 * will soon tell us about that.
555 */
556 need_multiple = false;
557 rcu_read_unlock();
558 break;
559 }
560
561 ht_cap = &sta->ht_cap;
562
563 need_multiple = true;
564
565 /*
566 * If the peer advertises no support for receiving 2 and 3
567 * stream MCS rates, it can't be transmitting them either.
568 */
569 if (ht_cap->mcs.rx_mask[1] == 0 &&
570 ht_cap->mcs.rx_mask[2] == 0) {
571 need_multiple = false;
572 } else if (!(ht_cap->mcs.tx_params &
573 IEEE80211_HT_MCS_TX_DEFINED)) {
574 /* If it can't TX MCS at all ... */
575 need_multiple = false;
576 } else if (ht_cap->mcs.tx_params &
577 IEEE80211_HT_MCS_TX_RX_DIFF) {
578 int maxstreams;
579
580 /*
581 * But if it can receive them, it might still not
582 * be able to transmit them, which is what we need
583 * to check here -- so check the number of streams
584 * it advertises for TX (if different from RX).
585 */
586
587 maxstreams = (ht_cap->mcs.tx_params &
588 IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK);
589 maxstreams >>=
590 IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT;
591 maxstreams += 1;
592
593 if (maxstreams <= 1)
594 need_multiple = false;
595 }
596
597 rcu_read_unlock();
598 break;
599 case NL80211_IFTYPE_ADHOC:
600 /* currently */
601 need_multiple = false;
602 break;
603 default:
604 /* only AP really */
605 need_multiple = true;
606 break;
607 }
608
609 ctx->ht_need_multiple_chains = need_multiple;
610
611 if (!need_multiple) {
612 /* check all contexts */
613 for_each_context(priv, tmp) {
614 if (!tmp->vif)
615 continue;
616 if (tmp->ht_need_multiple_chains) {
617 need_multiple = true;
618 break;
619 }
620 }
621 }
622
623 ht_conf->single_chain_sufficient = !need_multiple;
624 }
625
626 void iwlagn_bss_info_changed(struct ieee80211_hw *hw,
627 struct ieee80211_vif *vif,
628 struct ieee80211_bss_conf *bss_conf,
629 u32 changes)
630 {
631 struct iwl_priv *priv = hw->priv;
632 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
633 int ret;
634 bool force = false;
635
636 mutex_lock(&priv->mutex);
637
638 if (unlikely(!iwl_is_ready(priv))) {
639 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
640 mutex_unlock(&priv->mutex);
641 return;
642 }
643
644 if (unlikely(!ctx->vif)) {
645 IWL_DEBUG_MAC80211(priv, "leave - vif is NULL\n");
646 mutex_unlock(&priv->mutex);
647 return;
648 }
649
650 if (changes & BSS_CHANGED_BEACON_INT)
651 force = true;
652
653 if (changes & BSS_CHANGED_QOS) {
654 ctx->qos_data.qos_active = bss_conf->qos;
655 iwlagn_update_qos(priv, ctx);
656 }
657
658 ctx->staging.assoc_id = cpu_to_le16(vif->bss_conf.aid);
659 if (vif->bss_conf.use_short_preamble)
660 ctx->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
661 else
662 ctx->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
663
664 if (changes & BSS_CHANGED_ASSOC) {
665 if (bss_conf->assoc) {
666 priv->timestamp = bss_conf->timestamp;
667 ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
668 } else {
669 /*
670 * If we disassociate while there are pending
671 * frames, just wake up the queues and let the
672 * frames "escape" ... This shouldn't really
673 * be happening to start with, but we should
674 * not get stuck in this case either since it
675 * can happen if userspace gets confused.
676 */
677 if (ctx->last_tx_rejected) {
678 ctx->last_tx_rejected = false;
679 iwl_wake_any_queue(priv, ctx);
680 }
681 ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
682 }
683 }
684
685 if (ctx->ht.enabled) {
686 ctx->ht.protection = bss_conf->ht_operation_mode &
687 IEEE80211_HT_OP_MODE_PROTECTION;
688 ctx->ht.non_gf_sta_present = !!(bss_conf->ht_operation_mode &
689 IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT);
690 iwlagn_check_needed_chains(priv, ctx, bss_conf);
691 iwl_set_rxon_ht(priv, &priv->current_ht_config);
692 }
693
694 if (priv->cfg->ops->hcmd->set_rxon_chain)
695 priv->cfg->ops->hcmd->set_rxon_chain(priv, ctx);
696
697 if (bss_conf->use_cts_prot && (priv->band != IEEE80211_BAND_5GHZ))
698 ctx->staging.flags |= RXON_FLG_TGG_PROTECT_MSK;
699 else
700 ctx->staging.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
701
702 if (bss_conf->use_cts_prot)
703 ctx->staging.flags |= RXON_FLG_SELF_CTS_EN;
704 else
705 ctx->staging.flags &= ~RXON_FLG_SELF_CTS_EN;
706
707 memcpy(ctx->staging.bssid_addr, bss_conf->bssid, ETH_ALEN);
708
709 if (vif->type == NL80211_IFTYPE_AP ||
710 vif->type == NL80211_IFTYPE_ADHOC) {
711 if (vif->bss_conf.enable_beacon) {
712 ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
713 priv->beacon_ctx = ctx;
714 } else {
715 ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
716 priv->beacon_ctx = NULL;
717 }
718 }
719
720 if (force || memcmp(&ctx->staging, &ctx->active, sizeof(ctx->staging)))
721 iwlagn_commit_rxon(priv, ctx);
722
723 if (changes & BSS_CHANGED_ASSOC && bss_conf->assoc) {
724 /*
725 * The chain noise calibration will enable PM upon
726 * completion. If calibration has already been run
727 * then we need to enable power management here.
728 */
729 if (priv->chain_noise_data.state == IWL_CHAIN_NOISE_DONE)
730 iwl_power_update_mode(priv, false);
731
732 /* Enable RX differential gain and sensitivity calibrations */
733 iwl_chain_noise_reset(priv);
734 priv->start_calib = 1;
735 }
736
737 if (changes & BSS_CHANGED_IBSS) {
738 ret = iwlagn_manage_ibss_station(priv, vif,
739 bss_conf->ibss_joined);
740 if (ret)
741 IWL_ERR(priv, "failed to %s IBSS station %pM\n",
742 bss_conf->ibss_joined ? "add" : "remove",
743 bss_conf->bssid);
744 }
745
746 if (changes & BSS_CHANGED_BEACON && vif->type == NL80211_IFTYPE_ADHOC &&
747 priv->beacon_ctx) {
748 if (iwlagn_update_beacon(priv, vif))
749 IWL_ERR(priv, "Error sending IBSS beacon\n");
750 }
751
752 mutex_unlock(&priv->mutex);
753 }
754
755 void iwlagn_post_scan(struct iwl_priv *priv)
756 {
757 struct iwl_rxon_context *ctx;
758
759 /*
760 * Since setting the RXON may have been deferred while
761 * performing the scan, fire one off if needed
762 */
763 for_each_context(priv, ctx)
764 if (memcmp(&ctx->staging, &ctx->active, sizeof(ctx->staging)))
765 iwlagn_commit_rxon(priv, ctx);
766
767 if (priv->cfg->ops->hcmd->set_pan_params)
768 priv->cfg->ops->hcmd->set_pan_params(priv);
769 }
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree