/drivers/net/wireless/iwlwifi/iwl-agn-rxon.c
C | 782 lines | 511 code | 118 blank | 153 comment | 118 complexity | 20b8401ee2e145944ee0e33c8943f7bf MD5 | raw file
Possible License(s): GPL-2.0, LGPL-2.0, AGPL-1.0
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
34static 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
52static 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
84static 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
112static 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
124static 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
172static 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
201static 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 */
287int 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 /*
329 * force CTS-to-self frames protection if RTS-CTS is not preferred
330 * one aggregation protection method
331 */
332 if (!(priv->cfg->ht_params &&
333 priv->cfg->ht_params->use_rts_for_aggregation))
334 ctx->staging.flags |= RXON_FLG_SELF_CTS_EN;
335
336 if ((ctx->vif && ctx->vif->bss_conf.use_short_slot) ||
337 !(ctx->staging.flags & RXON_FLG_BAND_24G_MSK))
338 ctx->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
339 else
340 ctx->staging.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
341
342 iwl_print_rx_config_cmd(priv, ctx);
343 ret = iwl_check_rxon_cmd(priv, ctx);
344 if (ret) {
345 IWL_ERR(priv, "Invalid RXON configuration. Not committing.\n");
346 return -EINVAL;
347 }
348
349 /*
350 * receive commit_rxon request
351 * abort any previous channel switch if still in process
352 */
353 if (test_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status) &&
354 (priv->switch_channel != ctx->staging.channel)) {
355 IWL_DEBUG_11H(priv, "abort channel switch on %d\n",
356 le16_to_cpu(priv->switch_channel));
357 iwl_chswitch_done(priv, false);
358 }
359
360 /*
361 * If we don't need to send a full RXON, we can use
362 * iwl_rxon_assoc_cmd which is used to reconfigure filter
363 * and other flags for the current radio configuration.
364 */
365 if (!iwl_full_rxon_required(priv, ctx)) {
366 ret = iwlagn_send_rxon_assoc(priv, ctx);
367 if (ret) {
368 IWL_ERR(priv, "Error setting RXON_ASSOC (%d)\n", ret);
369 return ret;
370 }
371
372 memcpy(active, &ctx->staging, sizeof(*active));
373 /*
374 * We do not commit tx power settings while channel changing,
375 * do it now if after settings changed.
376 */
377 iwl_set_tx_power(priv, priv->tx_power_next, false);
378 return 0;
379 }
380
381 if (priv->cfg->ops->hcmd->set_pan_params) {
382 ret = priv->cfg->ops->hcmd->set_pan_params(priv);
383 if (ret)
384 return ret;
385 }
386
387 iwl_set_rxon_hwcrypto(priv, ctx, !iwlagn_mod_params.sw_crypto);
388
389 IWL_DEBUG_INFO(priv,
390 "Going to commit RXON\n"
391 " * with%s RXON_FILTER_ASSOC_MSK\n"
392 " * channel = %d\n"
393 " * bssid = %pM\n",
394 (new_assoc ? "" : "out"),
395 le16_to_cpu(ctx->staging.channel),
396 ctx->staging.bssid_addr);
397
398 /*
399 * Always clear associated first, but with the correct config.
400 * This is required as for example station addition for the
401 * AP station must be done after the BSSID is set to correctly
402 * set up filters in the device.
403 */
404 ret = iwlagn_rxon_disconn(priv, ctx);
405 if (ret)
406 return ret;
407
408 if (new_assoc)
409 return iwlagn_rxon_connect(priv, ctx);
410
411 return 0;
412}
413
414int iwlagn_mac_config(struct ieee80211_hw *hw, u32 changed)
415{
416 struct iwl_priv *priv = hw->priv;
417 struct iwl_rxon_context *ctx;
418 struct ieee80211_conf *conf = &hw->conf;
419 struct ieee80211_channel *channel = conf->channel;
420 const struct iwl_channel_info *ch_info;
421 int ret = 0;
422
423 IWL_DEBUG_MAC80211(priv, "changed %#x", changed);
424
425 mutex_lock(&priv->mutex);
426
427 if (unlikely(test_bit(STATUS_SCANNING, &priv->status))) {
428 IWL_DEBUG_MAC80211(priv, "leave - scanning\n");
429 goto out;
430 }
431
432 if (!iwl_is_ready(priv)) {
433 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
434 goto out;
435 }
436
437 if (changed & (IEEE80211_CONF_CHANGE_SMPS |
438 IEEE80211_CONF_CHANGE_CHANNEL)) {
439 /* mac80211 uses static for non-HT which is what we want */
440 priv->current_ht_config.smps = conf->smps_mode;
441
442 /*
443 * Recalculate chain counts.
444 *
445 * If monitor mode is enabled then mac80211 will
446 * set up the SM PS mode to OFF if an HT channel is
447 * configured.
448 */
449 if (priv->cfg->ops->hcmd->set_rxon_chain)
450 for_each_context(priv, ctx)
451 priv->cfg->ops->hcmd->set_rxon_chain(priv, ctx);
452 }
453
454 if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
455 unsigned long flags;
456
457 ch_info = iwl_get_channel_info(priv, channel->band,
458 channel->hw_value);
459 if (!is_channel_valid(ch_info)) {
460 IWL_DEBUG_MAC80211(priv, "leave - invalid channel\n");
461 ret = -EINVAL;
462 goto out;
463 }
464
465 spin_lock_irqsave(&priv->lock, flags);
466
467 for_each_context(priv, ctx) {
468 /* Configure HT40 channels */
469 if (ctx->ht.enabled != conf_is_ht(conf))
470 ctx->ht.enabled = conf_is_ht(conf);
471
472 if (ctx->ht.enabled) {
473 if (conf_is_ht40_minus(conf)) {
474 ctx->ht.extension_chan_offset =
475 IEEE80211_HT_PARAM_CHA_SEC_BELOW;
476 ctx->ht.is_40mhz = true;
477 } else if (conf_is_ht40_plus(conf)) {
478 ctx->ht.extension_chan_offset =
479 IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
480 ctx->ht.is_40mhz = true;
481 } else {
482 ctx->ht.extension_chan_offset =
483 IEEE80211_HT_PARAM_CHA_SEC_NONE;
484 ctx->ht.is_40mhz = false;
485 }
486 } else
487 ctx->ht.is_40mhz = false;
488
489 /*
490 * Default to no protection. Protection mode will
491 * later be set from BSS config in iwl_ht_conf
492 */
493 ctx->ht.protection = IEEE80211_HT_OP_MODE_PROTECTION_NONE;
494
495 /* if we are switching from ht to 2.4 clear flags
496 * from any ht related info since 2.4 does not
497 * support ht */
498 if (le16_to_cpu(ctx->staging.channel) !=
499 channel->hw_value)
500 ctx->staging.flags = 0;
501
502 iwl_set_rxon_channel(priv, channel, ctx);
503 iwl_set_rxon_ht(priv, &priv->current_ht_config);
504
505 iwl_set_flags_for_band(priv, ctx, channel->band,
506 ctx->vif);
507 }
508
509 spin_unlock_irqrestore(&priv->lock, flags);
510
511 iwl_update_bcast_stations(priv);
512
513 /*
514 * The list of supported rates and rate mask can be different
515 * for each band; since the band may have changed, reset
516 * the rate mask to what mac80211 lists.
517 */
518 iwl_set_rate(priv);
519 }
520
521 if (changed & (IEEE80211_CONF_CHANGE_PS |
522 IEEE80211_CONF_CHANGE_IDLE)) {
523 ret = iwl_power_update_mode(priv, false);
524 if (ret)
525 IWL_DEBUG_MAC80211(priv, "Error setting sleep level\n");
526 }
527
528 if (changed & IEEE80211_CONF_CHANGE_POWER) {
529 IWL_DEBUG_MAC80211(priv, "TX Power old=%d new=%d\n",
530 priv->tx_power_user_lmt, conf->power_level);
531
532 iwl_set_tx_power(priv, conf->power_level, false);
533 }
534
535 for_each_context(priv, ctx) {
536 if (!memcmp(&ctx->staging, &ctx->active, sizeof(ctx->staging)))
537 continue;
538 iwlagn_commit_rxon(priv, ctx);
539 }
540 out:
541 mutex_unlock(&priv->mutex);
542 return ret;
543}
544
545static void iwlagn_check_needed_chains(struct iwl_priv *priv,
546 struct iwl_rxon_context *ctx,
547 struct ieee80211_bss_conf *bss_conf)
548{
549 struct ieee80211_vif *vif = ctx->vif;
550 struct iwl_rxon_context *tmp;
551 struct ieee80211_sta *sta;
552 struct iwl_ht_config *ht_conf = &priv->current_ht_config;
553 struct ieee80211_sta_ht_cap *ht_cap;
554 bool need_multiple;
555
556 lockdep_assert_held(&priv->mutex);
557
558 switch (vif->type) {
559 case NL80211_IFTYPE_STATION:
560 rcu_read_lock();
561 sta = ieee80211_find_sta(vif, bss_conf->bssid);
562 if (!sta) {
563 /*
564 * If at all, this can only happen through a race
565 * when the AP disconnects us while we're still
566 * setting up the connection, in that case mac80211
567 * will soon tell us about that.
568 */
569 need_multiple = false;
570 rcu_read_unlock();
571 break;
572 }
573
574 ht_cap = &sta->ht_cap;
575
576 need_multiple = true;
577
578 /*
579 * If the peer advertises no support for receiving 2 and 3
580 * stream MCS rates, it can't be transmitting them either.
581 */
582 if (ht_cap->mcs.rx_mask[1] == 0 &&
583 ht_cap->mcs.rx_mask[2] == 0) {
584 need_multiple = false;
585 } else if (!(ht_cap->mcs.tx_params &
586 IEEE80211_HT_MCS_TX_DEFINED)) {
587 /* If it can't TX MCS at all ... */
588 need_multiple = false;
589 } else if (ht_cap->mcs.tx_params &
590 IEEE80211_HT_MCS_TX_RX_DIFF) {
591 int maxstreams;
592
593 /*
594 * But if it can receive them, it might still not
595 * be able to transmit them, which is what we need
596 * to check here -- so check the number of streams
597 * it advertises for TX (if different from RX).
598 */
599
600 maxstreams = (ht_cap->mcs.tx_params &
601 IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK);
602 maxstreams >>=
603 IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT;
604 maxstreams += 1;
605
606 if (maxstreams <= 1)
607 need_multiple = false;
608 }
609
610 rcu_read_unlock();
611 break;
612 case NL80211_IFTYPE_ADHOC:
613 /* currently */
614 need_multiple = false;
615 break;
616 default:
617 /* only AP really */
618 need_multiple = true;
619 break;
620 }
621
622 ctx->ht_need_multiple_chains = need_multiple;
623
624 if (!need_multiple) {
625 /* check all contexts */
626 for_each_context(priv, tmp) {
627 if (!tmp->vif)
628 continue;
629 if (tmp->ht_need_multiple_chains) {
630 need_multiple = true;
631 break;
632 }
633 }
634 }
635
636 ht_conf->single_chain_sufficient = !need_multiple;
637}
638
639void iwlagn_bss_info_changed(struct ieee80211_hw *hw,
640 struct ieee80211_vif *vif,
641 struct ieee80211_bss_conf *bss_conf,
642 u32 changes)
643{
644 struct iwl_priv *priv = hw->priv;
645 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
646 int ret;
647 bool force = false;
648
649 mutex_lock(&priv->mutex);
650
651 if (unlikely(!iwl_is_ready(priv))) {
652 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
653 mutex_unlock(&priv->mutex);
654 return;
655 }
656
657 if (unlikely(!ctx->vif)) {
658 IWL_DEBUG_MAC80211(priv, "leave - vif is NULL\n");
659 mutex_unlock(&priv->mutex);
660 return;
661 }
662
663 if (changes & BSS_CHANGED_BEACON_INT)
664 force = true;
665
666 if (changes & BSS_CHANGED_QOS) {
667 ctx->qos_data.qos_active = bss_conf->qos;
668 iwlagn_update_qos(priv, ctx);
669 }
670
671 ctx->staging.assoc_id = cpu_to_le16(vif->bss_conf.aid);
672 if (vif->bss_conf.use_short_preamble)
673 ctx->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
674 else
675 ctx->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
676
677 if (changes & BSS_CHANGED_ASSOC) {
678 if (bss_conf->assoc) {
679 priv->timestamp = bss_conf->timestamp;
680 ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
681 } else {
682 /*
683 * If we disassociate while there are pending
684 * frames, just wake up the queues and let the
685 * frames "escape" ... This shouldn't really
686 * be happening to start with, but we should
687 * not get stuck in this case either since it
688 * can happen if userspace gets confused.
689 */
690 if (ctx->last_tx_rejected) {
691 ctx->last_tx_rejected = false;
692 iwl_wake_any_queue(priv, ctx);
693 }
694 ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
695 }
696 }
697
698 if (ctx->ht.enabled) {
699 ctx->ht.protection = bss_conf->ht_operation_mode &
700 IEEE80211_HT_OP_MODE_PROTECTION;
701 ctx->ht.non_gf_sta_present = !!(bss_conf->ht_operation_mode &
702 IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT);
703 iwlagn_check_needed_chains(priv, ctx, bss_conf);
704 iwl_set_rxon_ht(priv, &priv->current_ht_config);
705 }
706
707 if (priv->cfg->ops->hcmd->set_rxon_chain)
708 priv->cfg->ops->hcmd->set_rxon_chain(priv, ctx);
709
710 if (bss_conf->use_cts_prot && (priv->band != IEEE80211_BAND_5GHZ))
711 ctx->staging.flags |= RXON_FLG_TGG_PROTECT_MSK;
712 else
713 ctx->staging.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
714
715 if (bss_conf->use_cts_prot)
716 ctx->staging.flags |= RXON_FLG_SELF_CTS_EN;
717 else
718 ctx->staging.flags &= ~RXON_FLG_SELF_CTS_EN;
719
720 memcpy(ctx->staging.bssid_addr, bss_conf->bssid, ETH_ALEN);
721
722 if (vif->type == NL80211_IFTYPE_AP ||
723 vif->type == NL80211_IFTYPE_ADHOC) {
724 if (vif->bss_conf.enable_beacon) {
725 ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
726 priv->beacon_ctx = ctx;
727 } else {
728 ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
729 priv->beacon_ctx = NULL;
730 }
731 }
732
733 if (force || memcmp(&ctx->staging, &ctx->active, sizeof(ctx->staging)))
734 iwlagn_commit_rxon(priv, ctx);
735
736 if (changes & BSS_CHANGED_ASSOC && bss_conf->assoc) {
737 /*
738 * The chain noise calibration will enable PM upon
739 * completion. If calibration has already been run
740 * then we need to enable power management here.
741 */
742 if (priv->chain_noise_data.state == IWL_CHAIN_NOISE_DONE)
743 iwl_power_update_mode(priv, false);
744
745 /* Enable RX differential gain and sensitivity calibrations */
746 iwl_chain_noise_reset(priv);
747 priv->start_calib = 1;
748 }
749
750 if (changes & BSS_CHANGED_IBSS) {
751 ret = iwlagn_manage_ibss_station(priv, vif,
752 bss_conf->ibss_joined);
753 if (ret)
754 IWL_ERR(priv, "failed to %s IBSS station %pM\n",
755 bss_conf->ibss_joined ? "add" : "remove",
756 bss_conf->bssid);
757 }
758
759 if (changes & BSS_CHANGED_BEACON && vif->type == NL80211_IFTYPE_ADHOC &&
760 priv->beacon_ctx) {
761 if (iwlagn_update_beacon(priv, vif))
762 IWL_ERR(priv, "Error sending IBSS beacon\n");
763 }
764
765 mutex_unlock(&priv->mutex);
766}
767
768void iwlagn_post_scan(struct iwl_priv *priv)
769{
770 struct iwl_rxon_context *ctx;
771
772 /*
773 * Since setting the RXON may have been deferred while
774 * performing the scan, fire one off if needed
775 */
776 for_each_context(priv, ctx)
777 if (memcmp(&ctx->staging, &ctx->active, sizeof(ctx->staging)))
778 iwlagn_commit_rxon(priv, ctx);
779
780 if (priv->cfg->ops->hcmd->set_pan_params)
781 priv->cfg->ops->hcmd->set_pan_params(priv);
782}