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iwlagn: call bt_coex directlly
[deliverable/linux.git] / drivers / net / wireless / iwlwifi / iwl-agn-rxon.c
CommitLineData
2295c66b
JB		 1/******************************************************************************
2 *
901069c7 3 * Copyright(c) 2003 - 2011 Intel Corporation. All rights reserved.
2295c66b
JB		 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"
68b99311 32#include "iwl-helpers.h"
2295c66b
JB		 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{
311dce71 56 struct iwl_notification_wait disable_wait;
2295c66b
JB		 57 __le32 old_filter = send->filter_flags;
58 u8 old_dev_type = send->dev_type;
59 int ret;
60
09f18afe
JB		 61 iwlagn_init_notification_wait(priv, &disable_wait,
62 REPLY_WIPAN_DEACTIVATION_COMPLETE,
63 NULL, NULL);
311dce71 64
2295c66b
JB		 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
311dce71 72 if (ret) {
2295c66b 73 IWL_ERR(priv, "Error disabling PAN (%d)\n", ret);
311dce71
JB		 74 iwlagn_remove_notification(priv, &disable_wait);
75 } else {
a8674a1e
JB		 76 ret = iwlagn_wait_notification(priv, &disable_wait, HZ);
77 if (ret)
311dce71
JB		 78 IWL_ERR(priv, "Timed out waiting for PAN disable\n");
79 }
2295c66b
JB		 80
81 return ret;
82}
83
2b9253d2
JB		 84static int iwlagn_disconn_pan(struct iwl_priv *priv,
85 struct iwl_rxon_context *ctx,
86 struct iwl_rxon_cmd *send)
87{
88 __le32 old_filter = send->filter_flags;
89 int ret;
90
91 send->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
92 ret = iwl_send_cmd_pdu(priv, ctx->rxon_cmd, sizeof(*send), send);
93
94 send->filter_flags = old_filter;
95
96 return ret;
97}
98
f4115d46
SZ		 99static void iwlagn_update_qos(struct iwl_priv *priv,
100 struct iwl_rxon_context *ctx)
101{
102 int ret;
103
104 if (!ctx->is_active)
105 return;
106
107 ctx->qos_data.def_qos_parm.qos_flags = 0;
108
109 if (ctx->qos_data.qos_active)
110 ctx->qos_data.def_qos_parm.qos_flags |=
111 QOS_PARAM_FLG_UPDATE_EDCA_MSK;
112
113 if (ctx->ht.enabled)
114 ctx->qos_data.def_qos_parm.qos_flags |= QOS_PARAM_FLG_TGN_MSK;
115
116 IWL_DEBUG_QOS(priv, "send QoS cmd with Qos active=%d FLAGS=0x%X\n",
117 ctx->qos_data.qos_active,
118 ctx->qos_data.def_qos_parm.qos_flags);
119
120 ret = iwl_send_cmd_pdu(priv, ctx->qos_cmd,
121 sizeof(struct iwl_qosparam_cmd),
122 &ctx->qos_data.def_qos_parm);
123 if (ret)
124 IWL_ERR(priv, "Failed to update QoS\n");
125}
126
bd50a8ab
JB		 127static int iwlagn_update_beacon(struct iwl_priv *priv,
128 struct ieee80211_vif *vif)
129{
130 lockdep_assert_held(&priv->mutex);
131
132 dev_kfree_skb(priv->beacon_skb);
133 priv->beacon_skb = ieee80211_beacon_get(priv->hw, vif);
134 if (!priv->beacon_skb)
135 return -ENOMEM;
136 return iwlagn_send_beacon_cmd(priv);
137}
138
c3f6e9cf
WYG		 139static int iwlagn_send_rxon_assoc(struct iwl_priv *priv,
140 struct iwl_rxon_context *ctx)
141{
142 int ret = 0;
89e746b2 143 struct iwl_rxon_assoc_cmd rxon_assoc;
c3f6e9cf
WYG		 144 const struct iwl_rxon_cmd *rxon1 = &ctx->staging;
145 const struct iwl_rxon_cmd *rxon2 = &ctx->active;
146
147 if ((rxon1->flags == rxon2->flags) &&
148 (rxon1->filter_flags == rxon2->filter_flags) &&
149 (rxon1->cck_basic_rates == rxon2->cck_basic_rates) &&
150 (rxon1->ofdm_ht_single_stream_basic_rates ==
151 rxon2->ofdm_ht_single_stream_basic_rates) &&
152 (rxon1->ofdm_ht_dual_stream_basic_rates ==
153 rxon2->ofdm_ht_dual_stream_basic_rates) &&
154 (rxon1->ofdm_ht_triple_stream_basic_rates ==
155 rxon2->ofdm_ht_triple_stream_basic_rates) &&
156 (rxon1->acquisition_data == rxon2->acquisition_data) &&
157 (rxon1->rx_chain == rxon2->rx_chain) &&
158 (rxon1->ofdm_basic_rates == rxon2->ofdm_basic_rates)) {
159 IWL_DEBUG_INFO(priv, "Using current RXON_ASSOC. Not resending.\n");
160 return 0;
161 }
162
163 rxon_assoc.flags = ctx->staging.flags;
164 rxon_assoc.filter_flags = ctx->staging.filter_flags;
165 rxon_assoc.ofdm_basic_rates = ctx->staging.ofdm_basic_rates;
166 rxon_assoc.cck_basic_rates = ctx->staging.cck_basic_rates;
167 rxon_assoc.reserved1 = 0;
168 rxon_assoc.reserved2 = 0;
169 rxon_assoc.reserved3 = 0;
170 rxon_assoc.ofdm_ht_single_stream_basic_rates =
171 ctx->staging.ofdm_ht_single_stream_basic_rates;
172 rxon_assoc.ofdm_ht_dual_stream_basic_rates =
173 ctx->staging.ofdm_ht_dual_stream_basic_rates;
174 rxon_assoc.rx_chain_select_flags = ctx->staging.rx_chain;
175 rxon_assoc.ofdm_ht_triple_stream_basic_rates =
176 ctx->staging.ofdm_ht_triple_stream_basic_rates;
177 rxon_assoc.acquisition_data = ctx->staging.acquisition_data;
178
179 ret = iwl_send_cmd_pdu_async(priv, ctx->rxon_assoc_cmd,
180 sizeof(rxon_assoc), &rxon_assoc, NULL);
c3f6e9cf
WYG		 181 return ret;
182}
183
c1821c95
WYG		 184static int iwlagn_rxon_disconn(struct iwl_priv *priv,
185 struct iwl_rxon_context *ctx)
186{
187 int ret;
188 struct iwl_rxon_cmd *active = (void *)&ctx->active;
189
2b9253d2 190 if (ctx->ctxid == IWL_RXON_CTX_BSS) {
c1821c95 191 ret = iwlagn_disable_bss(priv, ctx, &ctx->staging);
2b9253d2 192 } else {
c1821c95 193 ret = iwlagn_disable_pan(priv, ctx, &ctx->staging);
2b9253d2
JB		 194 if (ret)
195 return ret;
196 if (ctx->vif) {
197 ret = iwl_send_rxon_timing(priv, ctx);
198 if (ret) {
199 IWL_ERR(priv, "Failed to send timing (%d)!\n", ret);
200 return ret;
201 }
202 ret = iwlagn_disconn_pan(priv, ctx, &ctx->staging);
203 }
204 }
c1821c95
WYG		 205 if (ret)
206 return ret;
207
208 /*
209 * Un-assoc RXON clears the station table and WEP
210 * keys, so we have to restore those afterwards.
211 */
212 iwl_clear_ucode_stations(priv, ctx);
f775aa06
JB		 213 /* update -- might need P2P now */
214 iwl_update_bcast_station(priv, ctx);
c1821c95
WYG		 215 iwl_restore_stations(priv, ctx);
216 ret = iwl_restore_default_wep_keys(priv, ctx);
217 if (ret) {
218 IWL_ERR(priv, "Failed to restore WEP keys (%d)\n", ret);
219 return ret;
220 }
221
222 memcpy(active, &ctx->staging, sizeof(*active));
223 return 0;
224}
225
226static int iwlagn_rxon_connect(struct iwl_priv *priv,
227 struct iwl_rxon_context *ctx)
228{
229 int ret;
230 struct iwl_rxon_cmd *active = (void *)&ctx->active;
231
232 /* RXON timing must be before associated RXON */
2b9253d2
JB		 233 if (ctx->ctxid == IWL_RXON_CTX_BSS) {
234 ret = iwl_send_rxon_timing(priv, ctx);
235 if (ret) {
236 IWL_ERR(priv, "Failed to send timing (%d)!\n", ret);
237 return ret;
238 }
c1821c95
WYG		 239 }
240 /* QoS info may be cleared by previous un-assoc RXON */
241 iwlagn_update_qos(priv, ctx);
242
243 /*
244 * We'll run into this code path when beaconing is
245 * enabled, but then we also need to send the beacon
246 * to the device.
247 */
248 if (ctx->vif && (ctx->vif->type == NL80211_IFTYPE_AP)) {
249 ret = iwlagn_update_beacon(priv, ctx->vif);
250 if (ret) {
251 IWL_ERR(priv,
252 "Error sending required beacon (%d)!\n",
253 ret);
254 return ret;
255 }
256 }
257
258 priv->start_calib = 0;
259 /*
260 * Apply the new configuration.
261 *
262 * Associated RXON doesn't clear the station table in uCode,
263 * so we don't need to restore stations etc. after this.
264 */
265 ret = iwl_send_cmd_pdu(priv, ctx->rxon_cmd,
266 sizeof(struct iwl_rxon_cmd), &ctx->staging);
267 if (ret) {
268 IWL_ERR(priv, "Error setting new RXON (%d)\n", ret);
269 return ret;
270 }
271 memcpy(active, &ctx->staging, sizeof(*active));
272
273 iwl_reprogram_ap_sta(priv, ctx);
274
275 /* IBSS beacon needs to be sent after setting assoc */
276 if (ctx->vif && (ctx->vif->type == NL80211_IFTYPE_ADHOC))
277 if (iwlagn_update_beacon(priv, ctx->vif))
278 IWL_ERR(priv, "Error sending IBSS beacon\n");
279 iwl_init_sensitivity(priv);
280
281 /*
282 * If we issue a new RXON command which required a tune then
283 * we must send a new TXPOWER command or we won't be able to
284 * Tx any frames.
285 *
286 * It's expected we set power here if channel is changing.
287 */
288 ret = iwl_set_tx_power(priv, priv->tx_power_next, true);
289 if (ret) {
290 IWL_ERR(priv, "Error sending TX power (%d)\n", ret);
291 return ret;
292 }
15b3f3b0
WYG		 293
294 if ((ctx->vif && ctx->vif->type == NL80211_IFTYPE_STATION) &&
295 priv->cfg->ht_params->smps_mode)
296 ieee80211_request_smps(ctx->vif,
297 priv->cfg->ht_params->smps_mode);
298
c1821c95
WYG		 299 return 0;
300}
301
2295c66b
JB		 302/**
303 * iwlagn_commit_rxon - commit staging_rxon to hardware
304 *
305 * The RXON command in staging_rxon is committed to the hardware and
306 * the active_rxon structure is updated with the new data. This
307 * function correctly transitions out of the RXON_ASSOC_MSK state if
308 * a HW tune is required based on the RXON structure changes.
c1821c95
WYG		 309 *
310 * The connect/disconnect flow should be as the following:
311 *
312 * 1. make sure send RXON command with association bit unset if not connect
313 * this should include the channel and the band for the candidate
314 * to be connected to
315 * 2. Add Station before RXON association with the AP
316 * 3. RXON_timing has to send before RXON for connection
317 * 4. full RXON command - associated bit set
318 * 5. use RXON_ASSOC command to update any flags changes
2295c66b
JB		 319 */
320int iwlagn_commit_rxon(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
321{
322 /* cast away the const for active_rxon in this function */
323 struct iwl_rxon_cmd *active = (void *)&ctx->active;
2295c66b
JB		 324 bool new_assoc = !!(ctx->staging.filter_flags & RXON_FILTER_ASSOC_MSK);
325 int ret;
326
327 lockdep_assert_held(&priv->mutex);
328
adb90a00
WYG		 329 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
330 return -EINVAL;
331
2295c66b
JB		 332 if (!iwl_is_alive(priv))
333 return -EBUSY;
334
335 /* This function hardcodes a bunch of dual-mode assumptions */
336 BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
337
338 if (!ctx->is_active)
339 return 0;
340
341 /* always get timestamp with Rx frame */
342 ctx->staging.flags |= RXON_FLG_TSF2HOST_MSK;
343
9b9190d9
JB		 344 if (ctx->ctxid == IWL_RXON_CTX_PAN && priv->_agn.hw_roc_channel) {
345 struct ieee80211_channel *chan = priv->_agn.hw_roc_channel;
346
347 iwl_set_rxon_channel(priv, chan, ctx);
348 iwl_set_flags_for_band(priv, ctx, chan->band, NULL);
349 ctx->staging.filter_flags |=
350 RXON_FILTER_ASSOC_MSK |
351 RXON_FILTER_PROMISC_MSK |
352 RXON_FILTER_CTL2HOST_MSK;
353 ctx->staging.dev_type = RXON_DEV_TYPE_P2P;
354 new_assoc = true;
355
356 if (memcmp(&ctx->staging, &ctx->active,
357 sizeof(ctx->staging)) == 0)
358 return 0;
359 }
360
42b70a5f
SG		 361 /*
362 * force CTS-to-self frames protection if RTS-CTS is not preferred
363 * one aggregation protection method
364 */
365 if (!(priv->cfg->ht_params &&
366 priv->cfg->ht_params->use_rts_for_aggregation))
367 ctx->staging.flags |= RXON_FLG_SELF_CTS_EN;
368
2295c66b
JB		 369 if ((ctx->vif && ctx->vif->bss_conf.use_short_slot) ||
370 !(ctx->staging.flags & RXON_FLG_BAND_24G_MSK))
371 ctx->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
372 else
373 ctx->staging.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
374
c1821c95 375 iwl_print_rx_config_cmd(priv, ctx);
2295c66b
JB		 376 ret = iwl_check_rxon_cmd(priv, ctx);
377 if (ret) {
378 IWL_ERR(priv, "Invalid RXON configuration. Not committing.\n");
379 return -EINVAL;
380 }
381
382 /*
383 * receive commit_rxon request
384 * abort any previous channel switch if still in process
385 */
6f213ff1
SG		 386 if (test_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status) &&
387 (priv->switch_channel != ctx->staging.channel)) {
2295c66b 388 IWL_DEBUG_11H(priv, "abort channel switch on %d\n",
6f213ff1 389 le16_to_cpu(priv->switch_channel));
2295c66b
JB		 390 iwl_chswitch_done(priv, false);
391 }
392
393 /*
394 * If we don't need to send a full RXON, we can use
395 * iwl_rxon_assoc_cmd which is used to reconfigure filter
396 * and other flags for the current radio configuration.
397 */
398 if (!iwl_full_rxon_required(priv, ctx)) {
c3f6e9cf 399 ret = iwlagn_send_rxon_assoc(priv, ctx);
2295c66b
JB		 400 if (ret) {
401 IWL_ERR(priv, "Error setting RXON_ASSOC (%d)\n", ret);
402 return ret;
403 }
404
405 memcpy(active, &ctx->staging, sizeof(*active));
891db881
WYG		 406 /*
407 * We do not commit tx power settings while channel changing,
408 * do it now if after settings changed.
409 */
410 iwl_set_tx_power(priv, priv->tx_power_next, false);
15b3f3b0
WYG		 411
412 /* make sure we are in the right PS state */
413 iwl_power_update_mode(priv, true);
414
2295c66b
JB		 415 return 0;
416 }
417
9d143e9a 418 iwl_set_rxon_hwcrypto(priv, ctx, !iwlagn_mod_params.sw_crypto);
2295c66b
JB		 419
420 IWL_DEBUG_INFO(priv,
421 "Going to commit RXON\n"
422 " * with%s RXON_FILTER_ASSOC_MSK\n"
423 " * channel = %d\n"
424 " * bssid = %pM\n",
425 (new_assoc ? "" : "out"),
426 le16_to_cpu(ctx->staging.channel),
427 ctx->staging.bssid_addr);
428
429 /*
52d980c0
JB		 430 * Always clear associated first, but with the correct config.
431 * This is required as for example station addition for the
432 * AP station must be done after the BSSID is set to correctly
433 * set up filters in the device.
2295c66b 434 */
3083d03c
WYG		 435 ret = iwlagn_rxon_disconn(priv, ctx);
436 if (ret)
437 return ret;
2295c66b 438
2b9253d2
JB		 439 if (priv->cfg->ops->hcmd->set_pan_params) {
440 ret = priv->cfg->ops->hcmd->set_pan_params(priv);
441 if (ret)
442 return ret;
443 }
444
c1821c95
WYG		 445 if (new_assoc)
446 return iwlagn_rxon_connect(priv, ctx);
2295c66b
JB		 447
448 return 0;
449}
450
451int iwlagn_mac_config(struct ieee80211_hw *hw, u32 changed)
452{
453 struct iwl_priv *priv = hw->priv;
454 struct iwl_rxon_context *ctx;
455 struct ieee80211_conf *conf = &hw->conf;
456 struct ieee80211_channel *channel = conf->channel;
457 const struct iwl_channel_info *ch_info;
458 int ret = 0;
459
460 IWL_DEBUG_MAC80211(priv, "changed %#x", changed);
461
462 mutex_lock(&priv->mutex);
463
464 if (unlikely(test_bit(STATUS_SCANNING, &priv->status))) {
465 IWL_DEBUG_MAC80211(priv, "leave - scanning\n");
466 goto out;
467 }
468
469 if (!iwl_is_ready(priv)) {
470 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
471 goto out;
472 }
473
474 if (changed & (IEEE80211_CONF_CHANGE_SMPS |
475 IEEE80211_CONF_CHANGE_CHANNEL)) {
476 /* mac80211 uses static for non-HT which is what we want */
477 priv->current_ht_config.smps = conf->smps_mode;
478
479 /*
480 * Recalculate chain counts.
481 *
482 * If monitor mode is enabled then mac80211 will
483 * set up the SM PS mode to OFF if an HT channel is
484 * configured.
485 */
486 if (priv->cfg->ops->hcmd->set_rxon_chain)
487 for_each_context(priv, ctx)
488 priv->cfg->ops->hcmd->set_rxon_chain(priv, ctx);
489 }
490
491 if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
492 unsigned long flags;
493
494 ch_info = iwl_get_channel_info(priv, channel->band,
495 channel->hw_value);
496 if (!is_channel_valid(ch_info)) {
497 IWL_DEBUG_MAC80211(priv, "leave - invalid channel\n");
498 ret = -EINVAL;
499 goto out;
500 }
501
502 spin_lock_irqsave(&priv->lock, flags);
503
504 for_each_context(priv, ctx) {
505 /* Configure HT40 channels */
7caa2316 506 if (ctx->ht.enabled != conf_is_ht(conf))
35a6eb36 507 ctx->ht.enabled = conf_is_ht(conf);
35a6eb36 508
2295c66b
JB		 509 if (ctx->ht.enabled) {
510 if (conf_is_ht40_minus(conf)) {
511 ctx->ht.extension_chan_offset =
512 IEEE80211_HT_PARAM_CHA_SEC_BELOW;
513 ctx->ht.is_40mhz = true;
514 } else if (conf_is_ht40_plus(conf)) {
515 ctx->ht.extension_chan_offset =
516 IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
517 ctx->ht.is_40mhz = true;
518 } else {
519 ctx->ht.extension_chan_offset =
520 IEEE80211_HT_PARAM_CHA_SEC_NONE;
521 ctx->ht.is_40mhz = false;
522 }
523 } else
524 ctx->ht.is_40mhz = false;
525
526 /*
527 * Default to no protection. Protection mode will
528 * later be set from BSS config in iwl_ht_conf
529 */
530 ctx->ht.protection = IEEE80211_HT_OP_MODE_PROTECTION_NONE;
531
532 /* if we are switching from ht to 2.4 clear flags
533 * from any ht related info since 2.4 does not
534 * support ht */
535 if (le16_to_cpu(ctx->staging.channel) !=
536 channel->hw_value)
537 ctx->staging.flags = 0;
538
539 iwl_set_rxon_channel(priv, channel, ctx);
540 iwl_set_rxon_ht(priv, &priv->current_ht_config);
541
542 iwl_set_flags_for_band(priv, ctx, channel->band,
543 ctx->vif);
544 }
545
546 spin_unlock_irqrestore(&priv->lock, flags);
547
548 iwl_update_bcast_stations(priv);
549
550 /*
551 * The list of supported rates and rate mask can be different
552 * for each band; since the band may have changed, reset
553 * the rate mask to what mac80211 lists.
554 */
555 iwl_set_rate(priv);
556 }
557
558 if (changed & (IEEE80211_CONF_CHANGE_PS |
559 IEEE80211_CONF_CHANGE_IDLE)) {
560 ret = iwl_power_update_mode(priv, false);
561 if (ret)
562 IWL_DEBUG_MAC80211(priv, "Error setting sleep level\n");
563 }
564
565 if (changed & IEEE80211_CONF_CHANGE_POWER) {
566 IWL_DEBUG_MAC80211(priv, "TX Power old=%d new=%d\n",
567 priv->tx_power_user_lmt, conf->power_level);
568
569 iwl_set_tx_power(priv, conf->power_level, false);
570 }
571
572 for_each_context(priv, ctx) {
573 if (!memcmp(&ctx->staging, &ctx->active, sizeof(ctx->staging)))
574 continue;
575 iwlagn_commit_rxon(priv, ctx);
576 }
577 out:
578 mutex_unlock(&priv->mutex);
579 return ret;
580}
581
2295c66b
JB		 582static void iwlagn_check_needed_chains(struct iwl_priv *priv,
583 struct iwl_rxon_context *ctx,
584 struct ieee80211_bss_conf *bss_conf)
585{
586 struct ieee80211_vif *vif = ctx->vif;
587 struct iwl_rxon_context *tmp;
588 struct ieee80211_sta *sta;
589 struct iwl_ht_config *ht_conf = &priv->current_ht_config;
850bedcc 590 struct ieee80211_sta_ht_cap *ht_cap;
2295c66b
JB		 591 bool need_multiple;
592
593 lockdep_assert_held(&priv->mutex);
594
595 switch (vif->type) {
596 case NL80211_IFTYPE_STATION:
597 rcu_read_lock();
598 sta = ieee80211_find_sta(vif, bss_conf->bssid);
850bedcc 599 if (!sta) {
2295c66b
JB		 600 /*
601 * If at all, this can only happen through a race
602 * when the AP disconnects us while we're still
603 * setting up the connection, in that case mac80211
604 * will soon tell us about that.
605 */
606 need_multiple = false;
850bedcc
JB		 607 rcu_read_unlock();
608 break;
609 }
610
611 ht_cap = &sta->ht_cap;
612
613 need_multiple = true;
614
615 /*
616 * If the peer advertises no support for receiving 2 and 3
617 * stream MCS rates, it can't be transmitting them either.
618 */
619 if (ht_cap->mcs.rx_mask[1] == 0 &&
620 ht_cap->mcs.rx_mask[2] == 0) {
621 need_multiple = false;
622 } else if (!(ht_cap->mcs.tx_params &
623 IEEE80211_HT_MCS_TX_DEFINED)) {
624 /* If it can't TX MCS at all ... */
625 need_multiple = false;
626 } else if (ht_cap->mcs.tx_params &
627 IEEE80211_HT_MCS_TX_RX_DIFF) {
628 int maxstreams;
629
630 /*
631 * But if it can receive them, it might still not
632 * be able to transmit them, which is what we need
633 * to check here -- so check the number of streams
634 * it advertises for TX (if different from RX).
635 */
636
637 maxstreams = (ht_cap->mcs.tx_params &
638 IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK);
639 maxstreams >>=
640 IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT;
641 maxstreams += 1;
642
643 if (maxstreams <= 1)
644 need_multiple = false;
2295c66b 645 }
850bedcc 646
2295c66b
JB		 647 rcu_read_unlock();
648 break;
649 case NL80211_IFTYPE_ADHOC:
650 /* currently */
651 need_multiple = false;
652 break;
653 default:
654 /* only AP really */
655 need_multiple = true;
656 break;
657 }
658
659 ctx->ht_need_multiple_chains = need_multiple;
660
661 if (!need_multiple) {
662 /* check all contexts */
663 for_each_context(priv, tmp) {
664 if (!tmp->vif)
665 continue;
666 if (tmp->ht_need_multiple_chains) {
667 need_multiple = true;
668 break;
669 }
670 }
671 }
672
673 ht_conf->single_chain_sufficient = !need_multiple;
674}
675
676void iwlagn_bss_info_changed(struct ieee80211_hw *hw,
677 struct ieee80211_vif *vif,
678 struct ieee80211_bss_conf *bss_conf,
679 u32 changes)
680{
681 struct iwl_priv *priv = hw->priv;
682 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
683 int ret;
684 bool force = false;
685
686 mutex_lock(&priv->mutex);
687
ae0b693c 688 if (unlikely(!iwl_is_ready(priv))) {
14a085e7
WYG		 689 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
690 mutex_unlock(&priv->mutex);
ae0b693c
SZ		 691 return;
692 }
693
694 if (unlikely(!ctx->vif)) {
695 IWL_DEBUG_MAC80211(priv, "leave - vif is NULL\n");
893654de
JB		 696 mutex_unlock(&priv->mutex);
697 return;
698 }
699
2295c66b
JB		 700 if (changes & BSS_CHANGED_BEACON_INT)
701 force = true;
702
703 if (changes & BSS_CHANGED_QOS) {
704 ctx->qos_data.qos_active = bss_conf->qos;
705 iwlagn_update_qos(priv, ctx);
706 }
707
708 ctx->staging.assoc_id = cpu_to_le16(vif->bss_conf.aid);
709 if (vif->bss_conf.use_short_preamble)
710 ctx->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
711 else
712 ctx->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
713
714 if (changes & BSS_CHANGED_ASSOC) {
715 if (bss_conf->assoc) {
2295c66b
JB		 716 priv->timestamp = bss_conf->timestamp;
717 ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
718 } else {
68b99311
GT		 719 /*
720 * If we disassociate while there are pending
721 * frames, just wake up the queues and let the
722 * frames "escape" ... This shouldn't really
723 * be happening to start with, but we should
724 * not get stuck in this case either since it
725 * can happen if userspace gets confused.
726 */
727 if (ctx->last_tx_rejected) {
728 ctx->last_tx_rejected = false;
729 iwl_wake_any_queue(priv, ctx);
730 }
2295c66b 731 ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2295c66b
JB		 732 }
733 }
734
735 if (ctx->ht.enabled) {
736 ctx->ht.protection = bss_conf->ht_operation_mode &
737 IEEE80211_HT_OP_MODE_PROTECTION;
738 ctx->ht.non_gf_sta_present = !!(bss_conf->ht_operation_mode &
739 IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT);
740 iwlagn_check_needed_chains(priv, ctx, bss_conf);
b2769b84 741 iwl_set_rxon_ht(priv, &priv->current_ht_config);
2295c66b
JB		 742 }
743
744 if (priv->cfg->ops->hcmd->set_rxon_chain)
745 priv->cfg->ops->hcmd->set_rxon_chain(priv, ctx);
746
747 if (bss_conf->use_cts_prot && (priv->band != IEEE80211_BAND_5GHZ))
748 ctx->staging.flags |= RXON_FLG_TGG_PROTECT_MSK;
749 else
750 ctx->staging.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
751
752 if (bss_conf->use_cts_prot)
753 ctx->staging.flags |= RXON_FLG_SELF_CTS_EN;
754 else
755 ctx->staging.flags &= ~RXON_FLG_SELF_CTS_EN;
756
757 memcpy(ctx->staging.bssid_addr, bss_conf->bssid, ETH_ALEN);
758
759 if (vif->type == NL80211_IFTYPE_AP ||
760 vif->type == NL80211_IFTYPE_ADHOC) {
761 if (vif->bss_conf.enable_beacon) {
762 ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
763 priv->beacon_ctx = ctx;
764 } else {
765 ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
766 priv->beacon_ctx = NULL;
767 }
768 }
769
770 if (force || memcmp(&ctx->staging, &ctx->active, sizeof(ctx->staging)))
771 iwlagn_commit_rxon(priv, ctx);
772
8da8e628
JB		 773 if (changes & BSS_CHANGED_ASSOC && bss_conf->assoc) {
774 /*
775 * The chain noise calibration will enable PM upon
776 * completion. If calibration has already been run
777 * then we need to enable power management here.
778 */
779 if (priv->chain_noise_data.state == IWL_CHAIN_NOISE_DONE)
780 iwl_power_update_mode(priv, false);
781
782 /* Enable RX differential gain and sensitivity calibrations */
783 iwl_chain_noise_reset(priv);
784 priv->start_calib = 1;
785 }
786
2295c66b
JB		 787 if (changes & BSS_CHANGED_IBSS) {
788 ret = iwlagn_manage_ibss_station(priv, vif,
789 bss_conf->ibss_joined);
790 if (ret)
791 IWL_ERR(priv, "failed to %s IBSS station %pM\n",
792 bss_conf->ibss_joined ? "add" : "remove",
793 bss_conf->bssid);
794 }
795
bd50a8ab
JB		 796 if (changes & BSS_CHANGED_BEACON && vif->type == NL80211_IFTYPE_ADHOC &&
797 priv->beacon_ctx) {
798 if (iwlagn_update_beacon(priv, vif))
799 IWL_ERR(priv, "Error sending IBSS beacon\n");
800 }
801
2295c66b
JB		 802 mutex_unlock(&priv->mutex);
803}
ae79d23d
JB		 804
805void iwlagn_post_scan(struct iwl_priv *priv)
806{
807 struct iwl_rxon_context *ctx;
808
c2b821d7
WYG		 809 /*
810 * We do not commit power settings while scan is pending,
811 * do it now if the settings changed.
812 */
813 iwl_power_set_mode(priv, &priv->power_data.sleep_cmd_next, false);
814 iwl_set_tx_power(priv, priv->tx_power_next, false);
815
ae79d23d
JB		 816 /*
817 * Since setting the RXON may have been deferred while
818 * performing the scan, fire one off if needed
819 */
820 for_each_context(priv, ctx)
821 if (memcmp(&ctx->staging, &ctx->active, sizeof(ctx->staging)))
822 iwlagn_commit_rxon(priv, ctx);
823
824 if (priv->cfg->ops->hcmd->set_pan_params)
825 priv->cfg->ops->hcmd->set_pan_params(priv);
826}
Linux kernel - Deliverables
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