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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
35static int iwlagn_disable_bss(struct iwl_priv *priv,
36 struct iwl_rxon_context *ctx,
37 struct iwl_rxon_cmd *send)
38{
39 __le32 old_filter = send->filter_flags;
40 int ret;
41
42 send->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
43 ret = trans_send_cmd_pdu(&priv->trans, ctx->rxon_cmd,
44 CMD_SYNC, sizeof(*send), send);
45
46 send->filter_flags = old_filter;
47
48 if (ret)
49 IWL_ERR(priv, "Error clearing ASSOC_MSK on BSS (%d)\n", ret);
50
51 return ret;
52}
53
54static int iwlagn_disable_pan(struct iwl_priv *priv,
55 struct iwl_rxon_context *ctx,
56 struct iwl_rxon_cmd *send)
57{
58 struct iwl_notification_wait disable_wait;
59 __le32 old_filter = send->filter_flags;
60 u8 old_dev_type = send->dev_type;
61 int ret;
62
63 iwlagn_init_notification_wait(priv, &disable_wait,
64 REPLY_WIPAN_DEACTIVATION_COMPLETE,
65 NULL, NULL);
66
67 send->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
68 send->dev_type = RXON_DEV_TYPE_P2P;
69 ret = trans_send_cmd_pdu(&priv->trans, ctx->rxon_cmd,
70 CMD_SYNC, sizeof(*send), send);
71
72 send->filter_flags = old_filter;
73 send->dev_type = old_dev_type;
74
75 if (ret) {
76 IWL_ERR(priv, "Error disabling PAN (%d)\n", ret);
77 iwlagn_remove_notification(priv, &disable_wait);
78 } else {
79 ret = iwlagn_wait_notification(priv, &disable_wait, HZ);
80 if (ret)
81 IWL_ERR(priv, "Timed out waiting for PAN disable\n");
82 }
83
84 return ret;
85}
86
87static int iwlagn_disconn_pan(struct iwl_priv *priv,
88 struct iwl_rxon_context *ctx,
89 struct iwl_rxon_cmd *send)
90{
91 __le32 old_filter = send->filter_flags;
92 int ret;
93
94 send->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
95 ret = trans_send_cmd_pdu(&priv->trans, ctx->rxon_cmd, CMD_SYNC,
96 sizeof(*send), send);
97
98 send->filter_flags = old_filter;
99
100 return ret;
101}
102
103static void iwlagn_update_qos(struct iwl_priv *priv,
104 struct iwl_rxon_context *ctx)
105{
106 int ret;
107
108 if (!ctx->is_active)
109 return;
110
111 ctx->qos_data.def_qos_parm.qos_flags = 0;
112
113 if (ctx->qos_data.qos_active)
114 ctx->qos_data.def_qos_parm.qos_flags |=
115 QOS_PARAM_FLG_UPDATE_EDCA_MSK;
116
117 if (ctx->ht.enabled)
118 ctx->qos_data.def_qos_parm.qos_flags |= QOS_PARAM_FLG_TGN_MSK;
119
120 IWL_DEBUG_QOS(priv, "send QoS cmd with Qos active=%d FLAGS=0x%X\n",
121 ctx->qos_data.qos_active,
122 ctx->qos_data.def_qos_parm.qos_flags);
123
124 ret = trans_send_cmd_pdu(&priv->trans, ctx->qos_cmd, CMD_SYNC,
125 sizeof(struct iwl_qosparam_cmd),
126 &ctx->qos_data.def_qos_parm);
127 if (ret)
128 IWL_ERR(priv, "Failed to update QoS\n");
129}
130
131static int iwlagn_update_beacon(struct iwl_priv *priv,
132 struct ieee80211_vif *vif)
133{
134 lockdep_assert_held(&priv->mutex);
135
136 dev_kfree_skb(priv->beacon_skb);
137 priv->beacon_skb = ieee80211_beacon_get(priv->hw, vif);
138 if (!priv->beacon_skb)
139 return -ENOMEM;
140 return iwlagn_send_beacon_cmd(priv);
141}
142
143static int iwlagn_send_rxon_assoc(struct iwl_priv *priv,
144 struct iwl_rxon_context *ctx)
145{
146 int ret = 0;
147 struct iwl_rxon_assoc_cmd rxon_assoc;
148 const struct iwl_rxon_cmd *rxon1 = &ctx->staging;
149 const struct iwl_rxon_cmd *rxon2 = &ctx->active;
150
151 if ((rxon1->flags == rxon2->flags) &&
152 (rxon1->filter_flags == rxon2->filter_flags) &&
153 (rxon1->cck_basic_rates == rxon2->cck_basic_rates) &&
154 (rxon1->ofdm_ht_single_stream_basic_rates ==
155 rxon2->ofdm_ht_single_stream_basic_rates) &&
156 (rxon1->ofdm_ht_dual_stream_basic_rates ==
157 rxon2->ofdm_ht_dual_stream_basic_rates) &&
158 (rxon1->ofdm_ht_triple_stream_basic_rates ==
159 rxon2->ofdm_ht_triple_stream_basic_rates) &&
160 (rxon1->acquisition_data == rxon2->acquisition_data) &&
161 (rxon1->rx_chain == rxon2->rx_chain) &&
162 (rxon1->ofdm_basic_rates == rxon2->ofdm_basic_rates)) {
163 IWL_DEBUG_INFO(priv, "Using current RXON_ASSOC. Not resending.\n");
164 return 0;
165 }
166
167 rxon_assoc.flags = ctx->staging.flags;
168 rxon_assoc.filter_flags = ctx->staging.filter_flags;
169 rxon_assoc.ofdm_basic_rates = ctx->staging.ofdm_basic_rates;
170 rxon_assoc.cck_basic_rates = ctx->staging.cck_basic_rates;
171 rxon_assoc.reserved1 = 0;
172 rxon_assoc.reserved2 = 0;
173 rxon_assoc.reserved3 = 0;
174 rxon_assoc.ofdm_ht_single_stream_basic_rates =
175 ctx->staging.ofdm_ht_single_stream_basic_rates;
176 rxon_assoc.ofdm_ht_dual_stream_basic_rates =
177 ctx->staging.ofdm_ht_dual_stream_basic_rates;
178 rxon_assoc.rx_chain_select_flags = ctx->staging.rx_chain;
179 rxon_assoc.ofdm_ht_triple_stream_basic_rates =
180 ctx->staging.ofdm_ht_triple_stream_basic_rates;
181 rxon_assoc.acquisition_data = ctx->staging.acquisition_data;
182
183 ret = trans_send_cmd_pdu(&priv->trans, ctx->rxon_assoc_cmd,
184 CMD_ASYNC, sizeof(rxon_assoc), &rxon_assoc);
185 return ret;
186}
187
188static int iwlagn_rxon_disconn(struct iwl_priv *priv,
189 struct iwl_rxon_context *ctx)
190{
191 int ret;
192 struct iwl_rxon_cmd *active = (void *)&ctx->active;
193
194 if (ctx->ctxid == IWL_RXON_CTX_BSS) {
195 ret = iwlagn_disable_bss(priv, ctx, &ctx->staging);
196 } else {
197 ret = iwlagn_disable_pan(priv, ctx, &ctx->staging);
198 if (ret)
199 return ret;
200 if (ctx->vif) {
201 ret = iwl_send_rxon_timing(priv, ctx);
202 if (ret) {
203 IWL_ERR(priv, "Failed to send timing (%d)!\n", ret);
204 return ret;
205 }
206 ret = iwlagn_disconn_pan(priv, ctx, &ctx->staging);
207 }
208 }
209 if (ret)
210 return ret;
211
212 /*
213 * Un-assoc RXON clears the station table and WEP
214 * keys, so we have to restore those afterwards.
215 */
216 iwl_clear_ucode_stations(priv, ctx);
217 /* update -- might need P2P now */
218 iwl_update_bcast_station(priv, ctx);
219 iwl_restore_stations(priv, ctx);
220 ret = iwl_restore_default_wep_keys(priv, ctx);
221 if (ret) {
222 IWL_ERR(priv, "Failed to restore WEP keys (%d)\n", ret);
223 return ret;
224 }
225
226 memcpy(active, &ctx->staging, sizeof(*active));
227 return 0;
228}
229
230static int iwlagn_rxon_connect(struct iwl_priv *priv,
231 struct iwl_rxon_context *ctx)
232{
233 int ret;
234 struct iwl_rxon_cmd *active = (void *)&ctx->active;
235
236 /* RXON timing must be before associated RXON */
237 if (ctx->ctxid == IWL_RXON_CTX_BSS) {
238 ret = iwl_send_rxon_timing(priv, ctx);
239 if (ret) {
240 IWL_ERR(priv, "Failed to send timing (%d)!\n", ret);
241 return ret;
242 }
243 }
244 /* QoS info may be cleared by previous un-assoc RXON */
245 iwlagn_update_qos(priv, ctx);
246
247 /*
248 * We'll run into this code path when beaconing is
249 * enabled, but then we also need to send the beacon
250 * to the device.
251 */
252 if (ctx->vif && (ctx->vif->type == NL80211_IFTYPE_AP)) {
253 ret = iwlagn_update_beacon(priv, ctx->vif);
254 if (ret) {
255 IWL_ERR(priv,
256 "Error sending required beacon (%d)!\n",
257 ret);
258 return ret;
259 }
260 }
261
262 priv->start_calib = 0;
263 /*
264 * Apply the new configuration.
265 *
266 * Associated RXON doesn't clear the station table in uCode,
267 * so we don't need to restore stations etc. after this.
268 */
269 ret = trans_send_cmd_pdu(&priv->trans, ctx->rxon_cmd, CMD_SYNC,
270 sizeof(struct iwl_rxon_cmd), &ctx->staging);
271 if (ret) {
272 IWL_ERR(priv, "Error setting new RXON (%d)\n", ret);
273 return ret;
274 }
275 memcpy(active, &ctx->staging, sizeof(*active));
276
277 iwl_reprogram_ap_sta(priv, ctx);
278
279 /* IBSS beacon needs to be sent after setting assoc */
280 if (ctx->vif && (ctx->vif->type == NL80211_IFTYPE_ADHOC))
281 if (iwlagn_update_beacon(priv, ctx->vif))
282 IWL_ERR(priv, "Error sending IBSS beacon\n");
283 iwl_init_sensitivity(priv);
284
285 /*
286 * If we issue a new RXON command which required a tune then
287 * we must send a new TXPOWER command or we won't be able to
288 * Tx any frames.
289 *
290 * It's expected we set power here if channel is changing.
291 */
292 ret = iwl_set_tx_power(priv, priv->tx_power_next, true);
293 if (ret) {
294 IWL_ERR(priv, "Error sending TX power (%d)\n", ret);
295 return ret;
296 }
297
298 if ((ctx->vif && ctx->vif->type == NL80211_IFTYPE_STATION) &&
299 priv->cfg->ht_params->smps_mode)
300 ieee80211_request_smps(ctx->vif,
301 priv->cfg->ht_params->smps_mode);
302
303 return 0;
304}
305
306int iwlagn_set_pan_params(struct iwl_priv *priv)
307{
308 struct iwl_wipan_params_cmd cmd;
309 struct iwl_rxon_context *ctx_bss, *ctx_pan;
310 int slot0 = 300, slot1 = 0;
311 int ret;
312
313 if (priv->valid_contexts == BIT(IWL_RXON_CTX_BSS))
314 return 0;
315
316 BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
317
318 lockdep_assert_held(&priv->mutex);
319
320 ctx_bss = &priv->contexts[IWL_RXON_CTX_BSS];
321 ctx_pan = &priv->contexts[IWL_RXON_CTX_PAN];
322
323 /*
324 * If the PAN context is inactive, then we don't need
325 * to update the PAN parameters, the last thing we'll
326 * have done before it goes inactive is making the PAN
327 * parameters be WLAN-only.
328 */
329 if (!ctx_pan->is_active)
330 return 0;
331
332 memset(&cmd, 0, sizeof(cmd));
333
334 /* only 2 slots are currently allowed */
335 cmd.num_slots = 2;
336
337 cmd.slots[0].type = 0; /* BSS */
338 cmd.slots[1].type = 1; /* PAN */
339
340 if (priv->hw_roc_channel) {
341 /* both contexts must be used for this to happen */
342 slot1 = priv->hw_roc_duration;
343 slot0 = IWL_MIN_SLOT_TIME;
344 } else if (ctx_bss->vif && ctx_pan->vif) {
345 int bcnint = ctx_pan->beacon_int;
346 int dtim = ctx_pan->vif->bss_conf.dtim_period ?: 1;
347
348 /* should be set, but seems unused?? */
349 cmd.flags |= cpu_to_le16(IWL_WIPAN_PARAMS_FLG_SLOTTED_MODE);
350
351 if (ctx_pan->vif->type == NL80211_IFTYPE_AP &&
352 bcnint &&
353 bcnint != ctx_bss->beacon_int) {
354 IWL_ERR(priv,
355 "beacon intervals don't match (%d, %d)\n",
356 ctx_bss->beacon_int, ctx_pan->beacon_int);
357 } else
358 bcnint = max_t(int, bcnint,
359 ctx_bss->beacon_int);
360 if (!bcnint)
361 bcnint = DEFAULT_BEACON_INTERVAL;
362 slot0 = bcnint / 2;
363 slot1 = bcnint - slot0;
364
365 if (test_bit(STATUS_SCAN_HW, &priv->status) ||
366 (!ctx_bss->vif->bss_conf.idle &&
367 !ctx_bss->vif->bss_conf.assoc)) {
368 slot0 = dtim * bcnint * 3 - IWL_MIN_SLOT_TIME;
369 slot1 = IWL_MIN_SLOT_TIME;
370 } else if (!ctx_pan->vif->bss_conf.idle &&
371 !ctx_pan->vif->bss_conf.assoc) {
372 slot1 = bcnint * 3 - IWL_MIN_SLOT_TIME;
373 slot0 = IWL_MIN_SLOT_TIME;
374 }
375 } else if (ctx_pan->vif) {
376 slot0 = 0;
377 slot1 = max_t(int, 1, ctx_pan->vif->bss_conf.dtim_period) *
378 ctx_pan->beacon_int;
379 slot1 = max_t(int, DEFAULT_BEACON_INTERVAL, slot1);
380
381 if (test_bit(STATUS_SCAN_HW, &priv->status)) {
382 slot0 = slot1 * 3 - IWL_MIN_SLOT_TIME;
383 slot1 = IWL_MIN_SLOT_TIME;
384 }
385 }
386
387 cmd.slots[0].width = cpu_to_le16(slot0);
388 cmd.slots[1].width = cpu_to_le16(slot1);
389
390 ret = trans_send_cmd_pdu(&priv->trans, REPLY_WIPAN_PARAMS, CMD_SYNC,
391 sizeof(cmd), &cmd);
392 if (ret)
393 IWL_ERR(priv, "Error setting PAN parameters (%d)\n", ret);
394
395 return ret;
396}
397
398/**
399 * iwlagn_commit_rxon - commit staging_rxon to hardware
400 *
401 * The RXON command in staging_rxon is committed to the hardware and
402 * the active_rxon structure is updated with the new data. This
403 * function correctly transitions out of the RXON_ASSOC_MSK state if
404 * a HW tune is required based on the RXON structure changes.
405 *
406 * The connect/disconnect flow should be as the following:
407 *
408 * 1. make sure send RXON command with association bit unset if not connect
409 * this should include the channel and the band for the candidate
410 * to be connected to
411 * 2. Add Station before RXON association with the AP
412 * 3. RXON_timing has to send before RXON for connection
413 * 4. full RXON command - associated bit set
414 * 5. use RXON_ASSOC command to update any flags changes
415 */
416int iwlagn_commit_rxon(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
417{
418 /* cast away the const for active_rxon in this function */
419 struct iwl_rxon_cmd *active = (void *)&ctx->active;
420 bool new_assoc = !!(ctx->staging.filter_flags & RXON_FILTER_ASSOC_MSK);
421 int ret;
422
423 lockdep_assert_held(&priv->mutex);
424
425 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
426 return -EINVAL;
427
428 if (!iwl_is_alive(priv))
429 return -EBUSY;
430
431 /* This function hardcodes a bunch of dual-mode assumptions */
432 BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
433
434 if (!ctx->is_active)
435 return 0;
436
437 /* always get timestamp with Rx frame */
438 ctx->staging.flags |= RXON_FLG_TSF2HOST_MSK;
439
440 if (ctx->ctxid == IWL_RXON_CTX_PAN && priv->hw_roc_channel) {
441 struct ieee80211_channel *chan = priv->hw_roc_channel;
442
443 iwl_set_rxon_channel(priv, chan, ctx);
444 iwl_set_flags_for_band(priv, ctx, chan->band, NULL);
445 ctx->staging.filter_flags |=
446 RXON_FILTER_ASSOC_MSK |
447 RXON_FILTER_PROMISC_MSK |
448 RXON_FILTER_CTL2HOST_MSK;
449 ctx->staging.dev_type = RXON_DEV_TYPE_P2P;
450 new_assoc = true;
451
452 if (memcmp(&ctx->staging, &ctx->active,
453 sizeof(ctx->staging)) == 0)
454 return 0;
455 }
456
457 /*
458 * force CTS-to-self frames protection if RTS-CTS is not preferred
459 * one aggregation protection method
460 */
461 if (!(priv->cfg->ht_params &&
462 priv->cfg->ht_params->use_rts_for_aggregation))
463 ctx->staging.flags |= RXON_FLG_SELF_CTS_EN;
464
465 if ((ctx->vif && ctx->vif->bss_conf.use_short_slot) ||
466 !(ctx->staging.flags & RXON_FLG_BAND_24G_MSK))
467 ctx->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
468 else
469 ctx->staging.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
470
471 iwl_print_rx_config_cmd(priv, ctx);
472 ret = iwl_check_rxon_cmd(priv, ctx);
473 if (ret) {
474 IWL_ERR(priv, "Invalid RXON configuration. Not committing.\n");
475 return -EINVAL;
476 }
477
478 /*
479 * receive commit_rxon request
480 * abort any previous channel switch if still in process
481 */
482 if (test_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status) &&
483 (priv->switch_channel != ctx->staging.channel)) {
484 IWL_DEBUG_11H(priv, "abort channel switch on %d\n",
485 le16_to_cpu(priv->switch_channel));
486 iwl_chswitch_done(priv, false);
487 }
488
489 /*
490 * If we don't need to send a full RXON, we can use
491 * iwl_rxon_assoc_cmd which is used to reconfigure filter
492 * and other flags for the current radio configuration.
493 */
494 if (!iwl_full_rxon_required(priv, ctx)) {
495 ret = iwlagn_send_rxon_assoc(priv, ctx);
496 if (ret) {
497 IWL_ERR(priv, "Error setting RXON_ASSOC (%d)\n", ret);
498 return ret;
499 }
500
501 memcpy(active, &ctx->staging, sizeof(*active));
502 /*
503 * We do not commit tx power settings while channel changing,
504 * do it now if after settings changed.
505 */
506 iwl_set_tx_power(priv, priv->tx_power_next, false);
507
508 /* make sure we are in the right PS state */
509 iwl_power_update_mode(priv, true);
510
511 return 0;
512 }
513
514 iwl_set_rxon_hwcrypto(priv, ctx, !iwlagn_mod_params.sw_crypto);
515
516 IWL_DEBUG_INFO(priv,
517 "Going to commit RXON\n"
518 " * with%s RXON_FILTER_ASSOC_MSK\n"
519 " * channel = %d\n"
520 " * bssid = %pM\n",
521 (new_assoc ? "" : "out"),
522 le16_to_cpu(ctx->staging.channel),
523 ctx->staging.bssid_addr);
524
525 /*
526 * Always clear associated first, but with the correct config.
527 * This is required as for example station addition for the
528 * AP station must be done after the BSSID is set to correctly
529 * set up filters in the device.
530 */
531 ret = iwlagn_rxon_disconn(priv, ctx);
532 if (ret)
533 return ret;
534
535 ret = iwlagn_set_pan_params(priv);
536 if (ret)
537 return ret;
538
539 if (new_assoc)
540 return iwlagn_rxon_connect(priv, ctx);
541
542 return 0;
543}
544
545int iwlagn_mac_config(struct ieee80211_hw *hw, u32 changed)
546{
547 struct iwl_priv *priv = hw->priv;
548 struct iwl_rxon_context *ctx;
549 struct ieee80211_conf *conf = &hw->conf;
550 struct ieee80211_channel *channel = conf->channel;
551 const struct iwl_channel_info *ch_info;
552 int ret = 0;
553
554 IWL_DEBUG_MAC80211(priv, "changed %#x", changed);
555
556 mutex_lock(&priv->mutex);
557
558 if (unlikely(test_bit(STATUS_SCANNING, &priv->status))) {
559 IWL_DEBUG_MAC80211(priv, "leave - scanning\n");
560 goto out;
561 }
562
563 if (!iwl_is_ready(priv)) {
564 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
565 goto out;
566 }
567
568 if (changed & (IEEE80211_CONF_CHANGE_SMPS |
569 IEEE80211_CONF_CHANGE_CHANNEL)) {
570 /* mac80211 uses static for non-HT which is what we want */
571 priv->current_ht_config.smps = conf->smps_mode;
572
573 /*
574 * Recalculate chain counts.
575 *
576 * If monitor mode is enabled then mac80211 will
577 * set up the SM PS mode to OFF if an HT channel is
578 * configured.
579 */
580 for_each_context(priv, ctx)
581 iwlagn_set_rxon_chain(priv, ctx);
582 }
583
584 if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
585 unsigned long flags;
586
587 ch_info = iwl_get_channel_info(priv, channel->band,
588 channel->hw_value);
589 if (!is_channel_valid(ch_info)) {
590 IWL_DEBUG_MAC80211(priv, "leave - invalid channel\n");
591 ret = -EINVAL;
592 goto out;
593 }
594
595 spin_lock_irqsave(&priv->lock, flags);
596
597 for_each_context(priv, ctx) {
598 /* Configure HT40 channels */
599 if (ctx->ht.enabled != conf_is_ht(conf))
600 ctx->ht.enabled = conf_is_ht(conf);
601
602 if (ctx->ht.enabled) {
603 if (conf_is_ht40_minus(conf)) {
604 ctx->ht.extension_chan_offset =
605 IEEE80211_HT_PARAM_CHA_SEC_BELOW;
606 ctx->ht.is_40mhz = true;
607 } else if (conf_is_ht40_plus(conf)) {
608 ctx->ht.extension_chan_offset =
609 IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
610 ctx->ht.is_40mhz = true;
611 } else {
612 ctx->ht.extension_chan_offset =
613 IEEE80211_HT_PARAM_CHA_SEC_NONE;
614 ctx->ht.is_40mhz = false;
615 }
616 } else
617 ctx->ht.is_40mhz = false;
618
619 /*
620 * Default to no protection. Protection mode will
621 * later be set from BSS config in iwl_ht_conf
622 */
623 ctx->ht.protection = IEEE80211_HT_OP_MODE_PROTECTION_NONE;
624
625 /* if we are switching from ht to 2.4 clear flags
626 * from any ht related info since 2.4 does not
627 * support ht */
628 if (le16_to_cpu(ctx->staging.channel) !=
629 channel->hw_value)
630 ctx->staging.flags = 0;
631
632 iwl_set_rxon_channel(priv, channel, ctx);
633 iwl_set_rxon_ht(priv, &priv->current_ht_config);
634
635 iwl_set_flags_for_band(priv, ctx, channel->band,
636 ctx->vif);
637 }
638
639 spin_unlock_irqrestore(&priv->lock, flags);
640
641 iwl_update_bcast_stations(priv);
642
643 /*
644 * The list of supported rates and rate mask can be different
645 * for each band; since the band may have changed, reset
646 * the rate mask to what mac80211 lists.
647 */
648 iwl_set_rate(priv);
649 }
650
651 if (changed & (IEEE80211_CONF_CHANGE_PS |
652 IEEE80211_CONF_CHANGE_IDLE)) {
653 ret = iwl_power_update_mode(priv, false);
654 if (ret)
655 IWL_DEBUG_MAC80211(priv, "Error setting sleep level\n");
656 }
657
658 if (changed & IEEE80211_CONF_CHANGE_POWER) {
659 IWL_DEBUG_MAC80211(priv, "TX Power old=%d new=%d\n",
660 priv->tx_power_user_lmt, conf->power_level);
661
662 iwl_set_tx_power(priv, conf->power_level, false);
663 }
664
665 for_each_context(priv, ctx) {
666 if (!memcmp(&ctx->staging, &ctx->active, sizeof(ctx->staging)))
667 continue;
668 iwlagn_commit_rxon(priv, ctx);
669 }
670 out:
671 mutex_unlock(&priv->mutex);
672 return ret;
673}
674
675static void iwlagn_check_needed_chains(struct iwl_priv *priv,
676 struct iwl_rxon_context *ctx,
677 struct ieee80211_bss_conf *bss_conf)
678{
679 struct ieee80211_vif *vif = ctx->vif;
680 struct iwl_rxon_context *tmp;
681 struct ieee80211_sta *sta;
682 struct iwl_ht_config *ht_conf = &priv->current_ht_config;
683 struct ieee80211_sta_ht_cap *ht_cap;
684 bool need_multiple;
685
686 lockdep_assert_held(&priv->mutex);
687
688 switch (vif->type) {
689 case NL80211_IFTYPE_STATION:
690 rcu_read_lock();
691 sta = ieee80211_find_sta(vif, bss_conf->bssid);
692 if (!sta) {
693 /*
694 * If at all, this can only happen through a race
695 * when the AP disconnects us while we're still
696 * setting up the connection, in that case mac80211
697 * will soon tell us about that.
698 */
699 need_multiple = false;
700 rcu_read_unlock();
701 break;
702 }
703
704 ht_cap = &sta->ht_cap;
705
706 need_multiple = true;
707
708 /*
709 * If the peer advertises no support for receiving 2 and 3
710 * stream MCS rates, it can't be transmitting them either.
711 */
712 if (ht_cap->mcs.rx_mask[1] == 0 &&
713 ht_cap->mcs.rx_mask[2] == 0) {
714 need_multiple = false;
715 } else if (!(ht_cap->mcs.tx_params &
716 IEEE80211_HT_MCS_TX_DEFINED)) {
717 /* If it can't TX MCS at all ... */
718 need_multiple = false;
719 } else if (ht_cap->mcs.tx_params &
720 IEEE80211_HT_MCS_TX_RX_DIFF) {
721 int maxstreams;
722
723 /*
724 * But if it can receive them, it might still not
725 * be able to transmit them, which is what we need
726 * to check here -- so check the number of streams
727 * it advertises for TX (if different from RX).
728 */
729
730 maxstreams = (ht_cap->mcs.tx_params &
731 IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK);
732 maxstreams >>=
733 IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT;
734 maxstreams += 1;
735
736 if (maxstreams <= 1)
737 need_multiple = false;
738 }
739
740 rcu_read_unlock();
741 break;
742 case NL80211_IFTYPE_ADHOC:
743 /* currently */
744 need_multiple = false;
745 break;
746 default:
747 /* only AP really */
748 need_multiple = true;
749 break;
750 }
751
752 ctx->ht_need_multiple_chains = need_multiple;
753
754 if (!need_multiple) {
755 /* check all contexts */
756 for_each_context(priv, tmp) {
757 if (!tmp->vif)
758 continue;
759 if (tmp->ht_need_multiple_chains) {
760 need_multiple = true;
761 break;
762 }
763 }
764 }
765
766 ht_conf->single_chain_sufficient = !need_multiple;
767}
768
769static void iwlagn_chain_noise_reset(struct iwl_priv *priv)
770{
771 struct iwl_chain_noise_data *data = &priv->chain_noise_data;
772 int ret;
773
774 if ((data->state == IWL_CHAIN_NOISE_ALIVE) &&
775 iwl_is_any_associated(priv)) {
776 struct iwl_calib_chain_noise_reset_cmd cmd;
777
778 /* clear data for chain noise calibration algorithm */
779 data->chain_noise_a = 0;
780 data->chain_noise_b = 0;
781 data->chain_noise_c = 0;
782 data->chain_signal_a = 0;
783 data->chain_signal_b = 0;
784 data->chain_signal_c = 0;
785 data->beacon_count = 0;
786
787 memset(&cmd, 0, sizeof(cmd));
788 iwl_set_calib_hdr(&cmd.hdr,
789 priv->phy_calib_chain_noise_reset_cmd);
790 ret = trans_send_cmd_pdu(&priv->trans,
791 REPLY_PHY_CALIBRATION_CMD,
792 CMD_SYNC, sizeof(cmd), &cmd);
793 if (ret)
794 IWL_ERR(priv,
795 "Could not send REPLY_PHY_CALIBRATION_CMD\n");
796 data->state = IWL_CHAIN_NOISE_ACCUMULATE;
797 IWL_DEBUG_CALIB(priv, "Run chain_noise_calibrate\n");
798 }
799}
800
801void iwlagn_bss_info_changed(struct ieee80211_hw *hw,
802 struct ieee80211_vif *vif,
803 struct ieee80211_bss_conf *bss_conf,
804 u32 changes)
805{
806 struct iwl_priv *priv = hw->priv;
807 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
808 int ret;
809 bool force = false;
810
811 mutex_lock(&priv->mutex);
812
813 if (unlikely(!iwl_is_ready(priv))) {
814 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
815 mutex_unlock(&priv->mutex);
816 return;
817 }
818
819 if (unlikely(!ctx->vif)) {
820 IWL_DEBUG_MAC80211(priv, "leave - vif is NULL\n");
821 mutex_unlock(&priv->mutex);
822 return;
823 }
824
825 if (changes & BSS_CHANGED_BEACON_INT)
826 force = true;
827
828 if (changes & BSS_CHANGED_QOS) {
829 ctx->qos_data.qos_active = bss_conf->qos;
830 iwlagn_update_qos(priv, ctx);
831 }
832
833 ctx->staging.assoc_id = cpu_to_le16(vif->bss_conf.aid);
834 if (vif->bss_conf.use_short_preamble)
835 ctx->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
836 else
837 ctx->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
838
839 if (changes & BSS_CHANGED_ASSOC) {
840 if (bss_conf->assoc) {
841 priv->timestamp = bss_conf->timestamp;
842 ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
843 } else {
844 /*
845 * If we disassociate while there are pending
846 * frames, just wake up the queues and let the
847 * frames "escape" ... This shouldn't really
848 * be happening to start with, but we should
849 * not get stuck in this case either since it
850 * can happen if userspace gets confused.
851 */
852 if (ctx->last_tx_rejected) {
853 ctx->last_tx_rejected = false;
854 iwl_wake_any_queue(priv, ctx);
855 }
856 ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
857
858 if (ctx->ctxid == IWL_RXON_CTX_BSS)
859 priv->have_rekey_data = false;
860 }
861
862 iwlagn_bt_coex_rssi_monitor(priv);
863 }
864
865 if (ctx->ht.enabled) {
866 ctx->ht.protection = bss_conf->ht_operation_mode &
867 IEEE80211_HT_OP_MODE_PROTECTION;
868 ctx->ht.non_gf_sta_present = !!(bss_conf->ht_operation_mode &
869 IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT);
870 iwlagn_check_needed_chains(priv, ctx, bss_conf);
871 iwl_set_rxon_ht(priv, &priv->current_ht_config);
872 }
873
874 iwlagn_set_rxon_chain(priv, ctx);
875
876 if (bss_conf->use_cts_prot && (priv->band != IEEE80211_BAND_5GHZ))
877 ctx->staging.flags |= RXON_FLG_TGG_PROTECT_MSK;
878 else
879 ctx->staging.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
880
881 if (bss_conf->use_cts_prot)
882 ctx->staging.flags |= RXON_FLG_SELF_CTS_EN;
883 else
884 ctx->staging.flags &= ~RXON_FLG_SELF_CTS_EN;
885
886 memcpy(ctx->staging.bssid_addr, bss_conf->bssid, ETH_ALEN);
887
888 if (vif->type == NL80211_IFTYPE_AP ||
889 vif->type == NL80211_IFTYPE_ADHOC) {
890 if (vif->bss_conf.enable_beacon) {
891 ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
892 priv->beacon_ctx = ctx;
893 } else {
894 ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
895 priv->beacon_ctx = NULL;
896 }
897 }
898
899 if (force || memcmp(&ctx->staging, &ctx->active, sizeof(ctx->staging)))
900 iwlagn_commit_rxon(priv, ctx);
901
902 if (changes & BSS_CHANGED_ASSOC && bss_conf->assoc) {
903 /*
904 * The chain noise calibration will enable PM upon
905 * completion. If calibration has already been run
906 * then we need to enable power management here.
907 */
908 if (priv->chain_noise_data.state == IWL_CHAIN_NOISE_DONE)
909 iwl_power_update_mode(priv, false);
910
911 /* Enable RX differential gain and sensitivity calibrations */
912 if (!priv->disable_chain_noise_cal)
913 iwlagn_chain_noise_reset(priv);
914 priv->start_calib = 1;
915 }
916
917 if (changes & BSS_CHANGED_IBSS) {
918 ret = iwlagn_manage_ibss_station(priv, vif,
919 bss_conf->ibss_joined);
920 if (ret)
921 IWL_ERR(priv, "failed to %s IBSS station %pM\n",
922 bss_conf->ibss_joined ? "add" : "remove",
923 bss_conf->bssid);
924 }
925
926 if (changes & BSS_CHANGED_BEACON && vif->type == NL80211_IFTYPE_ADHOC &&
927 priv->beacon_ctx) {
928 if (iwlagn_update_beacon(priv, vif))
929 IWL_ERR(priv, "Error sending IBSS beacon\n");
930 }
931
932 mutex_unlock(&priv->mutex);
933}
934
935void iwlagn_post_scan(struct iwl_priv *priv)
936{
937 struct iwl_rxon_context *ctx;
938
939 /*
940 * We do not commit power settings while scan is pending,
941 * do it now if the settings changed.
942 */
943 iwl_power_set_mode(priv, &priv->power_data.sleep_cmd_next, false);
944 iwl_set_tx_power(priv, priv->tx_power_next, false);
945
946 /*
947 * Since setting the RXON may have been deferred while
948 * performing the scan, fire one off if needed
949 */
950 for_each_context(priv, ctx)
951 if (memcmp(&ctx->staging, &ctx->active, sizeof(ctx->staging)))
952 iwlagn_commit_rxon(priv, ctx);
953
954 iwlagn_set_pan_params(priv);
955}