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Add linux-next specific files for 20110831
[linux-2.6/next.git] / drivers / net / wireless / iwlwifi / iwl-agn-rxon.c
blob1af276739d875f522d43ef0dad29d91889381c67
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 #include "iwl-trans.h"
34 #include "iwl-shared.h"
35
36 static int iwlagn_disable_bss(struct iwl_priv *priv,
37 struct iwl_rxon_context *ctx,
38 struct iwl_rxon_cmd *send)
39 {
40 __le32 old_filter = send->filter_flags;
41 int ret;
42
43 send->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
44 ret = iwl_trans_send_cmd_pdu(trans(priv), ctx->rxon_cmd,
45 CMD_SYNC, sizeof(*send), send);
46
47 send->filter_flags = old_filter;
48
49 if (ret)
50 IWL_ERR(priv, "Error clearing ASSOC_MSK on BSS (%d)\n", ret);
51
52 return ret;
53 }
54
55 static int iwlagn_disable_pan(struct iwl_priv *priv,
56 struct iwl_rxon_context *ctx,
57 struct iwl_rxon_cmd *send)
58 {
59 struct iwl_notification_wait disable_wait;
60 __le32 old_filter = send->filter_flags;
61 u8 old_dev_type = send->dev_type;
62 int ret;
63
64 iwlagn_init_notification_wait(priv, &disable_wait,
65 REPLY_WIPAN_DEACTIVATION_COMPLETE,
66 NULL, NULL);
67
68 send->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
69 send->dev_type = RXON_DEV_TYPE_P2P;
70 ret = iwl_trans_send_cmd_pdu(trans(priv), ctx->rxon_cmd,
71 CMD_SYNC, sizeof(*send), send);
72
73 send->filter_flags = old_filter;
74 send->dev_type = old_dev_type;
75
76 if (ret) {
77 IWL_ERR(priv, "Error disabling PAN (%d)\n", ret);
78 iwlagn_remove_notification(priv, &disable_wait);
79 } else {
80 ret = iwlagn_wait_notification(priv, &disable_wait, HZ);
81 if (ret)
82 IWL_ERR(priv, "Timed out waiting for PAN disable\n");
83 }
84
85 return ret;
86 }
87
88 static int iwlagn_disconn_pan(struct iwl_priv *priv,
89 struct iwl_rxon_context *ctx,
90 struct iwl_rxon_cmd *send)
91 {
92 __le32 old_filter = send->filter_flags;
93 int ret;
94
95 send->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
96 ret = iwl_trans_send_cmd_pdu(trans(priv), ctx->rxon_cmd, CMD_SYNC,
97 sizeof(*send), send);
98
99 send->filter_flags = old_filter;
100
101 return ret;
102 }
103
104 static void iwlagn_update_qos(struct iwl_priv *priv,
105 struct iwl_rxon_context *ctx)
106 {
107 int ret;
108
109 if (!ctx->is_active)
110 return;
111
112 ctx->qos_data.def_qos_parm.qos_flags = 0;
113
114 if (ctx->qos_data.qos_active)
115 ctx->qos_data.def_qos_parm.qos_flags |=
116 QOS_PARAM_FLG_UPDATE_EDCA_MSK;
117
118 if (ctx->ht.enabled)
119 ctx->qos_data.def_qos_parm.qos_flags |= QOS_PARAM_FLG_TGN_MSK;
120
121 IWL_DEBUG_QOS(priv, "send QoS cmd with Qos active=%d FLAGS=0x%X\n",
122 ctx->qos_data.qos_active,
123 ctx->qos_data.def_qos_parm.qos_flags);
124
125 ret = iwl_trans_send_cmd_pdu(trans(priv), ctx->qos_cmd, CMD_SYNC,
126 sizeof(struct iwl_qosparam_cmd),
127 &ctx->qos_data.def_qos_parm);
128 if (ret)
129 IWL_ERR(priv, "Failed to update QoS\n");
130 }
131
132 static int iwlagn_update_beacon(struct iwl_priv *priv,
133 struct ieee80211_vif *vif)
134 {
135 lockdep_assert_held(&priv->shrd->mutex);
136
137 dev_kfree_skb(priv->beacon_skb);
138 priv->beacon_skb = ieee80211_beacon_get(priv->hw, vif);
139 if (!priv->beacon_skb)
140 return -ENOMEM;
141 return iwlagn_send_beacon_cmd(priv);
142 }
143
144 static int iwlagn_send_rxon_assoc(struct iwl_priv *priv,
145 struct iwl_rxon_context *ctx)
146 {
147 int ret = 0;
148 struct iwl_rxon_assoc_cmd rxon_assoc;
149 const struct iwl_rxon_cmd *rxon1 = &ctx->staging;
150 const struct iwl_rxon_cmd *rxon2 = &ctx->active;
151
152 if ((rxon1->flags == rxon2->flags) &&
153 (rxon1->filter_flags == rxon2->filter_flags) &&
154 (rxon1->cck_basic_rates == rxon2->cck_basic_rates) &&
155 (rxon1->ofdm_ht_single_stream_basic_rates ==
156 rxon2->ofdm_ht_single_stream_basic_rates) &&
157 (rxon1->ofdm_ht_dual_stream_basic_rates ==
158 rxon2->ofdm_ht_dual_stream_basic_rates) &&
159 (rxon1->ofdm_ht_triple_stream_basic_rates ==
160 rxon2->ofdm_ht_triple_stream_basic_rates) &&
161 (rxon1->acquisition_data == rxon2->acquisition_data) &&
162 (rxon1->rx_chain == rxon2->rx_chain) &&
163 (rxon1->ofdm_basic_rates == rxon2->ofdm_basic_rates)) {
164 IWL_DEBUG_INFO(priv, "Using current RXON_ASSOC. Not resending.\n");
165 return 0;
166 }
167
168 rxon_assoc.flags = ctx->staging.flags;
169 rxon_assoc.filter_flags = ctx->staging.filter_flags;
170 rxon_assoc.ofdm_basic_rates = ctx->staging.ofdm_basic_rates;
171 rxon_assoc.cck_basic_rates = ctx->staging.cck_basic_rates;
172 rxon_assoc.reserved1 = 0;
173 rxon_assoc.reserved2 = 0;
174 rxon_assoc.reserved3 = 0;
175 rxon_assoc.ofdm_ht_single_stream_basic_rates =
176 ctx->staging.ofdm_ht_single_stream_basic_rates;
177 rxon_assoc.ofdm_ht_dual_stream_basic_rates =
178 ctx->staging.ofdm_ht_dual_stream_basic_rates;
179 rxon_assoc.rx_chain_select_flags = ctx->staging.rx_chain;
180 rxon_assoc.ofdm_ht_triple_stream_basic_rates =
181 ctx->staging.ofdm_ht_triple_stream_basic_rates;
182 rxon_assoc.acquisition_data = ctx->staging.acquisition_data;
183
184 ret = iwl_trans_send_cmd_pdu(trans(priv), ctx->rxon_assoc_cmd,
185 CMD_ASYNC, sizeof(rxon_assoc), &rxon_assoc);
186 return ret;
187 }
188
189 static int iwlagn_rxon_disconn(struct iwl_priv *priv,
190 struct iwl_rxon_context *ctx)
191 {
192 int ret;
193 struct iwl_rxon_cmd *active = (void *)&ctx->active;
194
195 if (ctx->ctxid == IWL_RXON_CTX_BSS) {
196 ret = iwlagn_disable_bss(priv, ctx, &ctx->staging);
197 } else {
198 ret = iwlagn_disable_pan(priv, ctx, &ctx->staging);
199 if (ret)
200 return ret;
201 if (ctx->vif) {
202 ret = iwl_send_rxon_timing(priv, ctx);
203 if (ret) {
204 IWL_ERR(priv, "Failed to send timing (%d)!\n", ret);
205 return ret;
206 }
207 ret = iwlagn_disconn_pan(priv, ctx, &ctx->staging);
208 }
209 }
210 if (ret)
211 return ret;
212
213 /*
214 * Un-assoc RXON clears the station table and WEP
215 * keys, so we have to restore those afterwards.
216 */
217 iwl_clear_ucode_stations(priv, ctx);
218 /* update -- might need P2P now */
219 iwl_update_bcast_station(priv, ctx);
220 iwl_restore_stations(priv, ctx);
221 ret = iwl_restore_default_wep_keys(priv, ctx);
222 if (ret) {
223 IWL_ERR(priv, "Failed to restore WEP keys (%d)\n", ret);
224 return ret;
225 }
226
227 memcpy(active, &ctx->staging, sizeof(*active));
228 return 0;
229 }
230
231 static int iwlagn_rxon_connect(struct iwl_priv *priv,
232 struct iwl_rxon_context *ctx)
233 {
234 int ret;
235 struct iwl_rxon_cmd *active = (void *)&ctx->active;
236
237 /* RXON timing must be before associated RXON */
238 if (ctx->ctxid == IWL_RXON_CTX_BSS) {
239 ret = iwl_send_rxon_timing(priv, ctx);
240 if (ret) {
241 IWL_ERR(priv, "Failed to send timing (%d)!\n", ret);
242 return ret;
243 }
244 }
245 /* QoS info may be cleared by previous un-assoc RXON */
246 iwlagn_update_qos(priv, ctx);
247
248 /*
249 * We'll run into this code path when beaconing is
250 * enabled, but then we also need to send the beacon
251 * to the device.
252 */
253 if (ctx->vif && (ctx->vif->type == NL80211_IFTYPE_AP)) {
254 ret = iwlagn_update_beacon(priv, ctx->vif);
255 if (ret) {
256 IWL_ERR(priv,
257 "Error sending required beacon (%d)!\n",
258 ret);
259 return ret;
260 }
261 }
262
263 priv->start_calib = 0;
264 /*
265 * Apply the new configuration.
266 *
267 * Associated RXON doesn't clear the station table in uCode,
268 * so we don't need to restore stations etc. after this.
269 */
270 ret = iwl_trans_send_cmd_pdu(trans(priv), ctx->rxon_cmd, CMD_SYNC,
271 sizeof(struct iwl_rxon_cmd), &ctx->staging);
272 if (ret) {
273 IWL_ERR(priv, "Error setting new RXON (%d)\n", ret);
274 return ret;
275 }
276 memcpy(active, &ctx->staging, sizeof(*active));
277
278 iwl_reprogram_ap_sta(priv, ctx);
279
280 /* IBSS beacon needs to be sent after setting assoc */
281 if (ctx->vif && (ctx->vif->type == NL80211_IFTYPE_ADHOC))
282 if (iwlagn_update_beacon(priv, ctx->vif))
283 IWL_ERR(priv, "Error sending IBSS beacon\n");
284 iwl_init_sensitivity(priv);
285
286 /*
287 * If we issue a new RXON command which required a tune then
288 * we must send a new TXPOWER command or we won't be able to
289 * Tx any frames.
290 *
291 * It's expected we set power here if channel is changing.
292 */
293 ret = iwl_set_tx_power(priv, priv->tx_power_next, true);
294 if (ret) {
295 IWL_ERR(priv, "Error sending TX power (%d)\n", ret);
296 return ret;
297 }
298
299 if ((ctx->vif && ctx->vif->type == NL80211_IFTYPE_STATION) &&
300 priv->cfg->ht_params->smps_mode)
301 ieee80211_request_smps(ctx->vif,
302 priv->cfg->ht_params->smps_mode);
303
304 return 0;
305 }
306
307 int iwlagn_set_pan_params(struct iwl_priv *priv)
308 {
309 struct iwl_wipan_params_cmd cmd;
310 struct iwl_rxon_context *ctx_bss, *ctx_pan;
311 int slot0 = 300, slot1 = 0;
312 int ret;
313
314 if (priv->valid_contexts == BIT(IWL_RXON_CTX_BSS))
315 return 0;
316
317 BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
318
319 lockdep_assert_held(&priv->shrd->mutex);
320
321 ctx_bss = &priv->contexts[IWL_RXON_CTX_BSS];
322 ctx_pan = &priv->contexts[IWL_RXON_CTX_PAN];
323
324 /*
325 * If the PAN context is inactive, then we don't need
326 * to update the PAN parameters, the last thing we'll
327 * have done before it goes inactive is making the PAN
328 * parameters be WLAN-only.
329 */
330 if (!ctx_pan->is_active)
331 return 0;
332
333 memset(&cmd, 0, sizeof(cmd));
334
335 /* only 2 slots are currently allowed */
336 cmd.num_slots = 2;
337
338 cmd.slots[0].type = 0; /* BSS */
339 cmd.slots[1].type = 1; /* PAN */
340
341 if (priv->hw_roc_setup) {
342 /* both contexts must be used for this to happen */
343 slot1 = IWL_MIN_SLOT_TIME;
344 slot0 = 3000;
345 } else if (ctx_bss->vif && ctx_pan->vif) {
346 int bcnint = ctx_pan->beacon_int;
347 int dtim = ctx_pan->vif->bss_conf.dtim_period ?: 1;
348
349 /* should be set, but seems unused?? */
350 cmd.flags |= cpu_to_le16(IWL_WIPAN_PARAMS_FLG_SLOTTED_MODE);
351
352 if (ctx_pan->vif->type == NL80211_IFTYPE_AP &&
353 bcnint &&
354 bcnint != ctx_bss->beacon_int) {
355 IWL_ERR(priv,
356 "beacon intervals don't match (%d, %d)\n",
357 ctx_bss->beacon_int, ctx_pan->beacon_int);
358 } else
359 bcnint = max_t(int, bcnint,
360 ctx_bss->beacon_int);
361 if (!bcnint)
362 bcnint = DEFAULT_BEACON_INTERVAL;
363 slot0 = bcnint / 2;
364 slot1 = bcnint - slot0;
365
366 if (test_bit(STATUS_SCAN_HW, &priv->shrd->status) ||
367 (!ctx_bss->vif->bss_conf.idle &&
368 !ctx_bss->vif->bss_conf.assoc)) {
369 slot0 = dtim * bcnint * 3 - IWL_MIN_SLOT_TIME;
370 slot1 = IWL_MIN_SLOT_TIME;
371 } else if (!ctx_pan->vif->bss_conf.idle &&
372 !ctx_pan->vif->bss_conf.assoc) {
373 slot1 = bcnint * 3 - IWL_MIN_SLOT_TIME;
374 slot0 = IWL_MIN_SLOT_TIME;
375 }
376 } else if (ctx_pan->vif) {
377 slot0 = 0;
378 slot1 = max_t(int, 1, ctx_pan->vif->bss_conf.dtim_period) *
379 ctx_pan->beacon_int;
380 slot1 = max_t(int, DEFAULT_BEACON_INTERVAL, slot1);
381
382 if (test_bit(STATUS_SCAN_HW, &priv->shrd->status)) {
383 slot0 = slot1 * 3 - IWL_MIN_SLOT_TIME;
384 slot1 = IWL_MIN_SLOT_TIME;
385 }
386 }
387
388 cmd.slots[0].width = cpu_to_le16(slot0);
389 cmd.slots[1].width = cpu_to_le16(slot1);
390
391 ret = iwl_trans_send_cmd_pdu(trans(priv), REPLY_WIPAN_PARAMS, CMD_SYNC,
392 sizeof(cmd), &cmd);
393 if (ret)
394 IWL_ERR(priv, "Error setting PAN parameters (%d)\n", ret);
395
396 return ret;
397 }
398
399 /**
400 * iwlagn_commit_rxon - commit staging_rxon to hardware
401 *
402 * The RXON command in staging_rxon is committed to the hardware and
403 * the active_rxon structure is updated with the new data. This
404 * function correctly transitions out of the RXON_ASSOC_MSK state if
405 * a HW tune is required based on the RXON structure changes.
406 *
407 * The connect/disconnect flow should be as the following:
408 *
409 * 1. make sure send RXON command with association bit unset if not connect
410 * this should include the channel and the band for the candidate
411 * to be connected to
412 * 2. Add Station before RXON association with the AP
413 * 3. RXON_timing has to send before RXON for connection
414 * 4. full RXON command - associated bit set
415 * 5. use RXON_ASSOC command to update any flags changes
416 */
417 int iwlagn_commit_rxon(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
418 {
419 /* cast away the const for active_rxon in this function */
420 struct iwl_rxon_cmd *active = (void *)&ctx->active;
421 bool new_assoc = !!(ctx->staging.filter_flags & RXON_FILTER_ASSOC_MSK);
422 int ret;
423
424 lockdep_assert_held(&priv->shrd->mutex);
425
426 if (test_bit(STATUS_EXIT_PENDING, &priv->shrd->status))
427 return -EINVAL;
428
429 if (!iwl_is_alive(priv->shrd))
430 return -EBUSY;
431
432 /* This function hardcodes a bunch of dual-mode assumptions */
433 BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
434
435 if (!ctx->is_active)
436 return 0;
437
438 /* override BSSID if necessary due to preauth */
439 if (ctx->preauth_bssid)
440 memcpy(ctx->staging.bssid_addr, ctx->bssid, ETH_ALEN);
441
442 /* always get timestamp with Rx frame */
443 ctx->staging.flags |= RXON_FLG_TSF2HOST_MSK;
444
445 /*
446 * force CTS-to-self frames protection if RTS-CTS is not preferred
447 * one aggregation protection method
448 */
449 if (!(priv->cfg->ht_params &&
450 priv->cfg->ht_params->use_rts_for_aggregation))
451 ctx->staging.flags |= RXON_FLG_SELF_CTS_EN;
452
453 if ((ctx->vif && ctx->vif->bss_conf.use_short_slot) ||
454 !(ctx->staging.flags & RXON_FLG_BAND_24G_MSK))
455 ctx->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
456 else
457 ctx->staging.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
458
459 iwl_print_rx_config_cmd(priv, ctx);
460 ret = iwl_check_rxon_cmd(priv, ctx);
461 if (ret) {
462 IWL_ERR(priv, "Invalid RXON configuration. Not committing.\n");
463 return -EINVAL;
464 }
465
466 /*
467 * receive commit_rxon request
468 * abort any previous channel switch if still in process
469 */
470 if (test_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->shrd->status) &&
471 (priv->switch_channel != ctx->staging.channel)) {
472 IWL_DEBUG_11H(priv, "abort channel switch on %d\n",
473 le16_to_cpu(priv->switch_channel));
474 iwl_chswitch_done(priv, false);
475 }
476
477 /*
478 * If we don't need to send a full RXON, we can use
479 * iwl_rxon_assoc_cmd which is used to reconfigure filter
480 * and other flags for the current radio configuration.
481 */
482 if (!iwl_full_rxon_required(priv, ctx)) {
483 ret = iwlagn_send_rxon_assoc(priv, ctx);
484 if (ret) {
485 IWL_ERR(priv, "Error setting RXON_ASSOC (%d)\n", ret);
486 return ret;
487 }
488
489 memcpy(active, &ctx->staging, sizeof(*active));
490 /*
491 * We do not commit tx power settings while channel changing,
492 * do it now if after settings changed.
493 */
494 iwl_set_tx_power(priv, priv->tx_power_next, false);
495
496 /* make sure we are in the right PS state */
497 iwl_power_update_mode(priv, true);
498
499 return 0;
500 }
501
502 iwl_set_rxon_hwcrypto(priv, ctx, !iwlagn_mod_params.sw_crypto);
503
504 IWL_DEBUG_INFO(priv,
505 "Going to commit RXON\n"
506 " * with%s RXON_FILTER_ASSOC_MSK\n"
507 " * channel = %d\n"
508 " * bssid = %pM\n",
509 (new_assoc ? "" : "out"),
510 le16_to_cpu(ctx->staging.channel),
511 ctx->staging.bssid_addr);
512
513 /*
514 * Always clear associated first, but with the correct config.
515 * This is required as for example station addition for the
516 * AP station must be done after the BSSID is set to correctly
517 * set up filters in the device.
518 */
519 ret = iwlagn_rxon_disconn(priv, ctx);
520 if (ret)
521 return ret;
522
523 ret = iwlagn_set_pan_params(priv);
524 if (ret)
525 return ret;
526
527 if (new_assoc)
528 return iwlagn_rxon_connect(priv, ctx);
529
530 return 0;
531 }
532
533 int iwlagn_mac_config(struct ieee80211_hw *hw, u32 changed)
534 {
535 struct iwl_priv *priv = hw->priv;
536 struct iwl_rxon_context *ctx;
537 struct ieee80211_conf *conf = &hw->conf;
538 struct ieee80211_channel *channel = conf->channel;
539 const struct iwl_channel_info *ch_info;
540 int ret = 0;
541
542 IWL_DEBUG_MAC80211(priv, "changed %#x", changed);
543
544 mutex_lock(&priv->shrd->mutex);
545
546 if (unlikely(test_bit(STATUS_SCANNING, &priv->shrd->status))) {
547 IWL_DEBUG_MAC80211(priv, "leave - scanning\n");
548 goto out;
549 }
550
551 if (!iwl_is_ready(priv->shrd)) {
552 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
553 goto out;
554 }
555
556 if (changed & (IEEE80211_CONF_CHANGE_SMPS |
557 IEEE80211_CONF_CHANGE_CHANNEL)) {
558 /* mac80211 uses static for non-HT which is what we want */
559 priv->current_ht_config.smps = conf->smps_mode;
560
561 /*
562 * Recalculate chain counts.
563 *
564 * If monitor mode is enabled then mac80211 will
565 * set up the SM PS mode to OFF if an HT channel is
566 * configured.
567 */
568 for_each_context(priv, ctx)
569 iwlagn_set_rxon_chain(priv, ctx);
570 }
571
572 if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
573 unsigned long flags;
574
575 ch_info = iwl_get_channel_info(priv, channel->band,
576 channel->hw_value);
577 if (!is_channel_valid(ch_info)) {
578 IWL_DEBUG_MAC80211(priv, "leave - invalid channel\n");
579 ret = -EINVAL;
580 goto out;
581 }
582
583 spin_lock_irqsave(&priv->shrd->lock, flags);
584
585 for_each_context(priv, ctx) {
586 /* Configure HT40 channels */
587 if (ctx->ht.enabled != conf_is_ht(conf))
588 ctx->ht.enabled = conf_is_ht(conf);
589
590 if (ctx->ht.enabled) {
591 if (conf_is_ht40_minus(conf)) {
592 ctx->ht.extension_chan_offset =
593 IEEE80211_HT_PARAM_CHA_SEC_BELOW;
594 ctx->ht.is_40mhz = true;
595 } else if (conf_is_ht40_plus(conf)) {
596 ctx->ht.extension_chan_offset =
597 IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
598 ctx->ht.is_40mhz = true;
599 } else {
600 ctx->ht.extension_chan_offset =
601 IEEE80211_HT_PARAM_CHA_SEC_NONE;
602 ctx->ht.is_40mhz = false;
603 }
604 } else
605 ctx->ht.is_40mhz = false;
606
607 /*
608 * Default to no protection. Protection mode will
609 * later be set from BSS config in iwl_ht_conf
610 */
611 ctx->ht.protection = IEEE80211_HT_OP_MODE_PROTECTION_NONE;
612
613 /* if we are switching from ht to 2.4 clear flags
614 * from any ht related info since 2.4 does not
615 * support ht */
616 if (le16_to_cpu(ctx->staging.channel) !=
617 channel->hw_value)
618 ctx->staging.flags = 0;
619
620 iwl_set_rxon_channel(priv, channel, ctx);
621 iwl_set_rxon_ht(priv, &priv->current_ht_config);
622
623 iwl_set_flags_for_band(priv, ctx, channel->band,
624 ctx->vif);
625 }
626
627 spin_unlock_irqrestore(&priv->shrd->lock, flags);
628
629 iwl_update_bcast_stations(priv);
630
631 /*
632 * The list of supported rates and rate mask can be different
633 * for each band; since the band may have changed, reset
634 * the rate mask to what mac80211 lists.
635 */
636 iwl_set_rate(priv);
637 }
638
639 if (changed & (IEEE80211_CONF_CHANGE_PS |
640 IEEE80211_CONF_CHANGE_IDLE)) {
641 ret = iwl_power_update_mode(priv, false);
642 if (ret)
643 IWL_DEBUG_MAC80211(priv, "Error setting sleep level\n");
644 }
645
646 if (changed & IEEE80211_CONF_CHANGE_POWER) {
647 IWL_DEBUG_MAC80211(priv, "TX Power old=%d new=%d\n",
648 priv->tx_power_user_lmt, conf->power_level);
649
650 iwl_set_tx_power(priv, conf->power_level, false);
651 }
652
653 for_each_context(priv, ctx) {
654 if (!memcmp(&ctx->staging, &ctx->active, sizeof(ctx->staging)))
655 continue;
656 iwlagn_commit_rxon(priv, ctx);
657 }
658 out:
659 mutex_unlock(&priv->shrd->mutex);
660 return ret;
661 }
662
663 static void iwlagn_check_needed_chains(struct iwl_priv *priv,
664 struct iwl_rxon_context *ctx,
665 struct ieee80211_bss_conf *bss_conf)
666 {
667 struct ieee80211_vif *vif = ctx->vif;
668 struct iwl_rxon_context *tmp;
669 struct ieee80211_sta *sta;
670 struct iwl_ht_config *ht_conf = &priv->current_ht_config;
671 struct ieee80211_sta_ht_cap *ht_cap;
672 bool need_multiple;
673
674 lockdep_assert_held(&priv->shrd->mutex);
675
676 switch (vif->type) {
677 case NL80211_IFTYPE_STATION:
678 rcu_read_lock();
679 sta = ieee80211_find_sta(vif, bss_conf->bssid);
680 if (!sta) {
681 /*
682 * If at all, this can only happen through a race
683 * when the AP disconnects us while we're still
684 * setting up the connection, in that case mac80211
685 * will soon tell us about that.
686 */
687 need_multiple = false;
688 rcu_read_unlock();
689 break;
690 }
691
692 ht_cap = &sta->ht_cap;
693
694 need_multiple = true;
695
696 /*
697 * If the peer advertises no support for receiving 2 and 3
698 * stream MCS rates, it can't be transmitting them either.
699 */
700 if (ht_cap->mcs.rx_mask[1] == 0 &&
701 ht_cap->mcs.rx_mask[2] == 0) {
702 need_multiple = false;
703 } else if (!(ht_cap->mcs.tx_params &
704 IEEE80211_HT_MCS_TX_DEFINED)) {
705 /* If it can't TX MCS at all ... */
706 need_multiple = false;
707 } else if (ht_cap->mcs.tx_params &
708 IEEE80211_HT_MCS_TX_RX_DIFF) {
709 int maxstreams;
710
711 /*
712 * But if it can receive them, it might still not
713 * be able to transmit them, which is what we need
714 * to check here -- so check the number of streams
715 * it advertises for TX (if different from RX).
716 */
717
718 maxstreams = (ht_cap->mcs.tx_params &
719 IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK);
720 maxstreams >>=
721 IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT;
722 maxstreams += 1;
723
724 if (maxstreams <= 1)
725 need_multiple = false;
726 }
727
728 rcu_read_unlock();
729 break;
730 case NL80211_IFTYPE_ADHOC:
731 /* currently */
732 need_multiple = false;
733 break;
734 default:
735 /* only AP really */
736 need_multiple = true;
737 break;
738 }
739
740 ctx->ht_need_multiple_chains = need_multiple;
741
742 if (!need_multiple) {
743 /* check all contexts */
744 for_each_context(priv, tmp) {
745 if (!tmp->vif)
746 continue;
747 if (tmp->ht_need_multiple_chains) {
748 need_multiple = true;
749 break;
750 }
751 }
752 }
753
754 ht_conf->single_chain_sufficient = !need_multiple;
755 }
756
757 static void iwlagn_chain_noise_reset(struct iwl_priv *priv)
758 {
759 struct iwl_chain_noise_data *data = &priv->chain_noise_data;
760 int ret;
761
762 if ((data->state == IWL_CHAIN_NOISE_ALIVE) &&
763 iwl_is_any_associated(priv)) {
764 struct iwl_calib_chain_noise_reset_cmd cmd;
765
766 /* clear data for chain noise calibration algorithm */
767 data->chain_noise_a = 0;
768 data->chain_noise_b = 0;
769 data->chain_noise_c = 0;
770 data->chain_signal_a = 0;
771 data->chain_signal_b = 0;
772 data->chain_signal_c = 0;
773 data->beacon_count = 0;
774
775 memset(&cmd, 0, sizeof(cmd));
776 iwl_set_calib_hdr(&cmd.hdr,
777 priv->phy_calib_chain_noise_reset_cmd);
778 ret = iwl_trans_send_cmd_pdu(trans(priv),
779 REPLY_PHY_CALIBRATION_CMD,
780 CMD_SYNC, sizeof(cmd), &cmd);
781 if (ret)
782 IWL_ERR(priv,
783 "Could not send REPLY_PHY_CALIBRATION_CMD\n");
784 data->state = IWL_CHAIN_NOISE_ACCUMULATE;
785 IWL_DEBUG_CALIB(priv, "Run chain_noise_calibrate\n");
786 }
787 }
788
789 void iwlagn_bss_info_changed(struct ieee80211_hw *hw,
790 struct ieee80211_vif *vif,
791 struct ieee80211_bss_conf *bss_conf,
792 u32 changes)
793 {
794 struct iwl_priv *priv = hw->priv;
795 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
796 int ret;
797 bool force = false;
798
799 mutex_lock(&priv->shrd->mutex);
800
801 if (unlikely(!iwl_is_ready(priv->shrd))) {
802 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
803 mutex_unlock(&priv->shrd->mutex);
804 return;
805 }
806
807 if (unlikely(!ctx->vif)) {
808 IWL_DEBUG_MAC80211(priv, "leave - vif is NULL\n");
809 mutex_unlock(&priv->shrd->mutex);
810 return;
811 }
812
813 if (changes & BSS_CHANGED_BEACON_INT)
814 force = true;
815
816 if (changes & BSS_CHANGED_QOS) {
817 ctx->qos_data.qos_active = bss_conf->qos;
818 iwlagn_update_qos(priv, ctx);
819 }
820
821 ctx->staging.assoc_id = cpu_to_le16(vif->bss_conf.aid);
822 if (vif->bss_conf.use_short_preamble)
823 ctx->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
824 else
825 ctx->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
826
827 if (changes & BSS_CHANGED_ASSOC) {
828 if (bss_conf->assoc) {
829 priv->timestamp = bss_conf->timestamp;
830 ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
831 } else {
832 /*
833 * If we disassociate while there are pending
834 * frames, just wake up the queues and let the
835 * frames "escape" ... This shouldn't really
836 * be happening to start with, but we should
837 * not get stuck in this case either since it
838 * can happen if userspace gets confused.
839 */
840 if (ctx->last_tx_rejected) {
841 ctx->last_tx_rejected = false;
842 iwl_trans_wake_any_queue(trans(priv),
843 ctx->ctxid);
844 }
845 ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
846
847 if (ctx->ctxid == IWL_RXON_CTX_BSS)
848 priv->have_rekey_data = false;
849 }
850
851 iwlagn_bt_coex_rssi_monitor(priv);
852 }
853
854 if (ctx->ht.enabled) {
855 ctx->ht.protection = bss_conf->ht_operation_mode &
856 IEEE80211_HT_OP_MODE_PROTECTION;
857 ctx->ht.non_gf_sta_present = !!(bss_conf->ht_operation_mode &
858 IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT);
859 iwlagn_check_needed_chains(priv, ctx, bss_conf);
860 iwl_set_rxon_ht(priv, &priv->current_ht_config);
861 }
862
863 iwlagn_set_rxon_chain(priv, ctx);
864
865 if (bss_conf->use_cts_prot && (priv->band != IEEE80211_BAND_5GHZ))
866 ctx->staging.flags |= RXON_FLG_TGG_PROTECT_MSK;
867 else
868 ctx->staging.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
869
870 if (bss_conf->use_cts_prot)
871 ctx->staging.flags |= RXON_FLG_SELF_CTS_EN;
872 else
873 ctx->staging.flags &= ~RXON_FLG_SELF_CTS_EN;
874
875 memcpy(ctx->staging.bssid_addr, bss_conf->bssid, ETH_ALEN);
876
877 if (vif->type == NL80211_IFTYPE_AP ||
878 vif->type == NL80211_IFTYPE_ADHOC) {
879 if (vif->bss_conf.enable_beacon) {
880 ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
881 priv->beacon_ctx = ctx;
882 } else {
883 ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
884 priv->beacon_ctx = NULL;
885 }
886 }
887
888 if (force || memcmp(&ctx->staging, &ctx->active, sizeof(ctx->staging)))
889 iwlagn_commit_rxon(priv, ctx);
890
891 if (changes & BSS_CHANGED_ASSOC && bss_conf->assoc) {
892 /*
893 * The chain noise calibration will enable PM upon
894 * completion. If calibration has already been run
895 * then we need to enable power management here.
896 */
897 if (priv->chain_noise_data.state == IWL_CHAIN_NOISE_DONE)
898 iwl_power_update_mode(priv, false);
899
900 /* Enable RX differential gain and sensitivity calibrations */
901 if (!priv->disable_chain_noise_cal)
902 iwlagn_chain_noise_reset(priv);
903 priv->start_calib = 1;
904 WARN_ON(ctx->preauth_bssid);
905 }
906
907 if (changes & BSS_CHANGED_IBSS) {
908 ret = iwlagn_manage_ibss_station(priv, vif,
909 bss_conf->ibss_joined);
910 if (ret)
911 IWL_ERR(priv, "failed to %s IBSS station %pM\n",
912 bss_conf->ibss_joined ? "add" : "remove",
913 bss_conf->bssid);
914 }
915
916 if (changes & BSS_CHANGED_BEACON && vif->type == NL80211_IFTYPE_ADHOC &&
917 priv->beacon_ctx) {
918 if (iwlagn_update_beacon(priv, vif))
919 IWL_ERR(priv, "Error sending IBSS beacon\n");
920 }
921
922 mutex_unlock(&priv->shrd->mutex);
923 }
924
925 void iwlagn_post_scan(struct iwl_priv *priv)
926 {
927 struct iwl_rxon_context *ctx;
928
929 /*
930 * We do not commit power settings while scan is pending,
931 * do it now if the settings changed.
932 */
933 iwl_power_set_mode(priv, &priv->power_data.sleep_cmd_next, false);
934 iwl_set_tx_power(priv, priv->tx_power_next, false);
935
936 /*
937 * Since setting the RXON may have been deferred while
938 * performing the scan, fire one off if needed
939 */
940 for_each_context(priv, ctx)
941 if (memcmp(&ctx->staging, &ctx->active, sizeof(ctx->staging)))
942 iwlagn_commit_rxon(priv, ctx);
943
944 iwlagn_set_pan_params(priv);
945 }
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