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iwlagn: remove hcmd ops
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / net / wireless / iwlwifi / iwl-agn-rxon.c
blobc6bb73a66d9f74a6e6f07fc9ea25bed7112c4f08
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 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
99 static 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
127 static 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
139 static int iwlagn_send_rxon_assoc(struct iwl_priv *priv,
140 struct iwl_rxon_context *ctx)
141 {
142 int ret = 0;
143 struct iwl_rxon_assoc_cmd rxon_assoc;
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);
181 return ret;
182 }
183
184 static 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
190 if (ctx->ctxid == IWL_RXON_CTX_BSS) {
191 ret = iwlagn_disable_bss(priv, ctx, &ctx->staging);
192 } else {
193 ret = iwlagn_disable_pan(priv, ctx, &ctx->staging);
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 }
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);
213 /* update -- might need P2P now */
214 iwl_update_bcast_station(priv, ctx);
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
226 static 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 */
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 }
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 }
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
299 return 0;
300 }
301
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.
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
319 */
320 int 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;
324 bool new_assoc = !!(ctx->staging.filter_flags & RXON_FILTER_ASSOC_MSK);
325 int ret;
326
327 lockdep_assert_held(&priv->mutex);
328
329 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
330 return -EINVAL;
331
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
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
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
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
375 iwl_print_rx_config_cmd(priv, ctx);
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 */
386 if (test_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status) &&
387 (priv->switch_channel != ctx->staging.channel)) {
388 IWL_DEBUG_11H(priv, "abort channel switch on %d\n",
389 le16_to_cpu(priv->switch_channel));
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)) {
399 ret = iwlagn_send_rxon_assoc(priv, ctx);
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));
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);
411
412 /* make sure we are in the right PS state */
413 iwl_power_update_mode(priv, true);
414
415 return 0;
416 }
417
418 iwl_set_rxon_hwcrypto(priv, ctx, !iwlagn_mod_params.sw_crypto);
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 /*
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.
434 */
435 ret = iwlagn_rxon_disconn(priv, ctx);
436 if (ret)
437 return ret;
438
439 ret = iwlagn_set_pan_params(priv);
440 if (ret)
441 return ret;
442
443 if (new_assoc)
444 return iwlagn_rxon_connect(priv, ctx);
445
446 return 0;
447 }
448
449 int iwlagn_mac_config(struct ieee80211_hw *hw, u32 changed)
450 {
451 struct iwl_priv *priv = hw->priv;
452 struct iwl_rxon_context *ctx;
453 struct ieee80211_conf *conf = &hw->conf;
454 struct ieee80211_channel *channel = conf->channel;
455 const struct iwl_channel_info *ch_info;
456 int ret = 0;
457
458 IWL_DEBUG_MAC80211(priv, "changed %#x", changed);
459
460 mutex_lock(&priv->mutex);
461
462 if (unlikely(test_bit(STATUS_SCANNING, &priv->status))) {
463 IWL_DEBUG_MAC80211(priv, "leave - scanning\n");
464 goto out;
465 }
466
467 if (!iwl_is_ready(priv)) {
468 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
469 goto out;
470 }
471
472 if (changed & (IEEE80211_CONF_CHANGE_SMPS |
473 IEEE80211_CONF_CHANGE_CHANNEL)) {
474 /* mac80211 uses static for non-HT which is what we want */
475 priv->current_ht_config.smps = conf->smps_mode;
476
477 /*
478 * Recalculate chain counts.
479 *
480 * If monitor mode is enabled then mac80211 will
481 * set up the SM PS mode to OFF if an HT channel is
482 * configured.
483 */
484 for_each_context(priv, ctx)
485 iwlagn_set_rxon_chain(priv, ctx);
486 }
487
488 if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
489 unsigned long flags;
490
491 ch_info = iwl_get_channel_info(priv, channel->band,
492 channel->hw_value);
493 if (!is_channel_valid(ch_info)) {
494 IWL_DEBUG_MAC80211(priv, "leave - invalid channel\n");
495 ret = -EINVAL;
496 goto out;
497 }
498
499 spin_lock_irqsave(&priv->lock, flags);
500
501 for_each_context(priv, ctx) {
502 /* Configure HT40 channels */
503 if (ctx->ht.enabled != conf_is_ht(conf))
504 ctx->ht.enabled = conf_is_ht(conf);
505
506 if (ctx->ht.enabled) {
507 if (conf_is_ht40_minus(conf)) {
508 ctx->ht.extension_chan_offset =
509 IEEE80211_HT_PARAM_CHA_SEC_BELOW;
510 ctx->ht.is_40mhz = true;
511 } else if (conf_is_ht40_plus(conf)) {
512 ctx->ht.extension_chan_offset =
513 IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
514 ctx->ht.is_40mhz = true;
515 } else {
516 ctx->ht.extension_chan_offset =
517 IEEE80211_HT_PARAM_CHA_SEC_NONE;
518 ctx->ht.is_40mhz = false;
519 }
520 } else
521 ctx->ht.is_40mhz = false;
522
523 /*
524 * Default to no protection. Protection mode will
525 * later be set from BSS config in iwl_ht_conf
526 */
527 ctx->ht.protection = IEEE80211_HT_OP_MODE_PROTECTION_NONE;
528
529 /* if we are switching from ht to 2.4 clear flags
530 * from any ht related info since 2.4 does not
531 * support ht */
532 if (le16_to_cpu(ctx->staging.channel) !=
533 channel->hw_value)
534 ctx->staging.flags = 0;
535
536 iwl_set_rxon_channel(priv, channel, ctx);
537 iwl_set_rxon_ht(priv, &priv->current_ht_config);
538
539 iwl_set_flags_for_band(priv, ctx, channel->band,
540 ctx->vif);
541 }
542
543 spin_unlock_irqrestore(&priv->lock, flags);
544
545 iwl_update_bcast_stations(priv);
546
547 /*
548 * The list of supported rates and rate mask can be different
549 * for each band; since the band may have changed, reset
550 * the rate mask to what mac80211 lists.
551 */
552 iwl_set_rate(priv);
553 }
554
555 if (changed & (IEEE80211_CONF_CHANGE_PS |
556 IEEE80211_CONF_CHANGE_IDLE)) {
557 ret = iwl_power_update_mode(priv, false);
558 if (ret)
559 IWL_DEBUG_MAC80211(priv, "Error setting sleep level\n");
560 }
561
562 if (changed & IEEE80211_CONF_CHANGE_POWER) {
563 IWL_DEBUG_MAC80211(priv, "TX Power old=%d new=%d\n",
564 priv->tx_power_user_lmt, conf->power_level);
565
566 iwl_set_tx_power(priv, conf->power_level, false);
567 }
568
569 for_each_context(priv, ctx) {
570 if (!memcmp(&ctx->staging, &ctx->active, sizeof(ctx->staging)))
571 continue;
572 iwlagn_commit_rxon(priv, ctx);
573 }
574 out:
575 mutex_unlock(&priv->mutex);
576 return ret;
577 }
578
579 static void iwlagn_check_needed_chains(struct iwl_priv *priv,
580 struct iwl_rxon_context *ctx,
581 struct ieee80211_bss_conf *bss_conf)
582 {
583 struct ieee80211_vif *vif = ctx->vif;
584 struct iwl_rxon_context *tmp;
585 struct ieee80211_sta *sta;
586 struct iwl_ht_config *ht_conf = &priv->current_ht_config;
587 struct ieee80211_sta_ht_cap *ht_cap;
588 bool need_multiple;
589
590 lockdep_assert_held(&priv->mutex);
591
592 switch (vif->type) {
593 case NL80211_IFTYPE_STATION:
594 rcu_read_lock();
595 sta = ieee80211_find_sta(vif, bss_conf->bssid);
596 if (!sta) {
597 /*
598 * If at all, this can only happen through a race
599 * when the AP disconnects us while we're still
600 * setting up the connection, in that case mac80211
601 * will soon tell us about that.
602 */
603 need_multiple = false;
604 rcu_read_unlock();
605 break;
606 }
607
608 ht_cap = &sta->ht_cap;
609
610 need_multiple = true;
611
612 /*
613 * If the peer advertises no support for receiving 2 and 3
614 * stream MCS rates, it can't be transmitting them either.
615 */
616 if (ht_cap->mcs.rx_mask[1] == 0 &&
617 ht_cap->mcs.rx_mask[2] == 0) {
618 need_multiple = false;
619 } else if (!(ht_cap->mcs.tx_params &
620 IEEE80211_HT_MCS_TX_DEFINED)) {
621 /* If it can't TX MCS at all ... */
622 need_multiple = false;
623 } else if (ht_cap->mcs.tx_params &
624 IEEE80211_HT_MCS_TX_RX_DIFF) {
625 int maxstreams;
626
627 /*
628 * But if it can receive them, it might still not
629 * be able to transmit them, which is what we need
630 * to check here -- so check the number of streams
631 * it advertises for TX (if different from RX).
632 */
633
634 maxstreams = (ht_cap->mcs.tx_params &
635 IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK);
636 maxstreams >>=
637 IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT;
638 maxstreams += 1;
639
640 if (maxstreams <= 1)
641 need_multiple = false;
642 }
643
644 rcu_read_unlock();
645 break;
646 case NL80211_IFTYPE_ADHOC:
647 /* currently */
648 need_multiple = false;
649 break;
650 default:
651 /* only AP really */
652 need_multiple = true;
653 break;
654 }
655
656 ctx->ht_need_multiple_chains = need_multiple;
657
658 if (!need_multiple) {
659 /* check all contexts */
660 for_each_context(priv, tmp) {
661 if (!tmp->vif)
662 continue;
663 if (tmp->ht_need_multiple_chains) {
664 need_multiple = true;
665 break;
666 }
667 }
668 }
669
670 ht_conf->single_chain_sufficient = !need_multiple;
671 }
672
673 void iwlagn_bss_info_changed(struct ieee80211_hw *hw,
674 struct ieee80211_vif *vif,
675 struct ieee80211_bss_conf *bss_conf,
676 u32 changes)
677 {
678 struct iwl_priv *priv = hw->priv;
679 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
680 int ret;
681 bool force = false;
682
683 mutex_lock(&priv->mutex);
684
685 if (unlikely(!iwl_is_ready(priv))) {
686 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
687 mutex_unlock(&priv->mutex);
688 return;
689 }
690
691 if (unlikely(!ctx->vif)) {
692 IWL_DEBUG_MAC80211(priv, "leave - vif is NULL\n");
693 mutex_unlock(&priv->mutex);
694 return;
695 }
696
697 if (changes & BSS_CHANGED_BEACON_INT)
698 force = true;
699
700 if (changes & BSS_CHANGED_QOS) {
701 ctx->qos_data.qos_active = bss_conf->qos;
702 iwlagn_update_qos(priv, ctx);
703 }
704
705 ctx->staging.assoc_id = cpu_to_le16(vif->bss_conf.aid);
706 if (vif->bss_conf.use_short_preamble)
707 ctx->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
708 else
709 ctx->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
710
711 if (changes & BSS_CHANGED_ASSOC) {
712 if (bss_conf->assoc) {
713 priv->timestamp = bss_conf->timestamp;
714 ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
715 } else {
716 /*
717 * If we disassociate while there are pending
718 * frames, just wake up the queues and let the
719 * frames "escape" ... This shouldn't really
720 * be happening to start with, but we should
721 * not get stuck in this case either since it
722 * can happen if userspace gets confused.
723 */
724 if (ctx->last_tx_rejected) {
725 ctx->last_tx_rejected = false;
726 iwl_wake_any_queue(priv, ctx);
727 }
728 ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
729 }
730 }
731
732 if (ctx->ht.enabled) {
733 ctx->ht.protection = bss_conf->ht_operation_mode &
734 IEEE80211_HT_OP_MODE_PROTECTION;
735 ctx->ht.non_gf_sta_present = !!(bss_conf->ht_operation_mode &
736 IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT);
737 iwlagn_check_needed_chains(priv, ctx, bss_conf);
738 iwl_set_rxon_ht(priv, &priv->current_ht_config);
739 }
740
741 iwlagn_set_rxon_chain(priv, ctx);
742
743 if (bss_conf->use_cts_prot && (priv->band != IEEE80211_BAND_5GHZ))
744 ctx->staging.flags |= RXON_FLG_TGG_PROTECT_MSK;
745 else
746 ctx->staging.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
747
748 if (bss_conf->use_cts_prot)
749 ctx->staging.flags |= RXON_FLG_SELF_CTS_EN;
750 else
751 ctx->staging.flags &= ~RXON_FLG_SELF_CTS_EN;
752
753 memcpy(ctx->staging.bssid_addr, bss_conf->bssid, ETH_ALEN);
754
755 if (vif->type == NL80211_IFTYPE_AP ||
756 vif->type == NL80211_IFTYPE_ADHOC) {
757 if (vif->bss_conf.enable_beacon) {
758 ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
759 priv->beacon_ctx = ctx;
760 } else {
761 ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
762 priv->beacon_ctx = NULL;
763 }
764 }
765
766 if (force || memcmp(&ctx->staging, &ctx->active, sizeof(ctx->staging)))
767 iwlagn_commit_rxon(priv, ctx);
768
769 if (changes & BSS_CHANGED_ASSOC && bss_conf->assoc) {
770 /*
771 * The chain noise calibration will enable PM upon
772 * completion. If calibration has already been run
773 * then we need to enable power management here.
774 */
775 if (priv->chain_noise_data.state == IWL_CHAIN_NOISE_DONE)
776 iwl_power_update_mode(priv, false);
777
778 /* Enable RX differential gain and sensitivity calibrations */
779 iwl_chain_noise_reset(priv);
780 priv->start_calib = 1;
781 }
782
783 if (changes & BSS_CHANGED_IBSS) {
784 ret = iwlagn_manage_ibss_station(priv, vif,
785 bss_conf->ibss_joined);
786 if (ret)
787 IWL_ERR(priv, "failed to %s IBSS station %pM\n",
788 bss_conf->ibss_joined ? "add" : "remove",
789 bss_conf->bssid);
790 }
791
792 if (changes & BSS_CHANGED_BEACON && vif->type == NL80211_IFTYPE_ADHOC &&
793 priv->beacon_ctx) {
794 if (iwlagn_update_beacon(priv, vif))
795 IWL_ERR(priv, "Error sending IBSS beacon\n");
796 }
797
798 mutex_unlock(&priv->mutex);
799 }
800
801 void iwlagn_post_scan(struct iwl_priv *priv)
802 {
803 struct iwl_rxon_context *ctx;
804
805 /*
806 * We do not commit power settings while scan is pending,
807 * do it now if the settings changed.
808 */
809 iwl_power_set_mode(priv, &priv->power_data.sleep_cmd_next, false);
810 iwl_set_tx_power(priv, priv->tx_power_next, false);
811
812 /*
813 * Since setting the RXON may have been deferred while
814 * performing the scan, fire one off if needed
815 */
816 for_each_context(priv, ctx)
817 if (memcmp(&ctx->staging, &ctx->active, sizeof(ctx->staging)))
818 iwlagn_commit_rxon(priv, ctx);
819
820 iwlagn_set_pan_params(priv);
821 }
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree