1 /******************************************************************************
2 *
3 * Copyright(c) 2003 - 2012 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-core.h"
30 #include "iwl-agn-calib.h"
31 #include "iwl-trans.h"
32 #include "iwl-shared.h"
33
iwlagn_disable_bss(struct iwl_priv * priv,struct iwl_rxon_context * ctx,struct iwl_rxon_cmd * send)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_dvm_send_cmd_pdu(priv, ctx->rxon_cmd,
43 CMD_SYNC, sizeof(*send), send);
44
45 send->filter_flags = old_filter;
46
47 if (ret)
48 IWL_DEBUG_QUIET_RFKILL(priv,
49 "Error clearing ASSOC_MSK on BSS (%d)\n", ret);
50
51 return ret;
52 }
53
iwlagn_disable_pan(struct iwl_priv * priv,struct iwl_rxon_context * ctx,struct iwl_rxon_cmd * send)54 static 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 iwl_init_notification_wait(&priv->notif_wait, &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 = iwl_dvm_send_cmd_pdu(priv, 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 iwl_remove_notification(&priv->notif_wait, &disable_wait);
78 } else {
79 ret = iwl_wait_notification(&priv->notif_wait,
80 &disable_wait, HZ);
81 if (ret)
82 IWL_ERR(priv, "Timed out waiting for PAN disable\n");
83 }
84
85 return ret;
86 }
87
iwlagn_disconn_pan(struct iwl_priv * priv,struct iwl_rxon_context * ctx,struct iwl_rxon_cmd * send)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_dvm_send_cmd_pdu(priv, ctx->rxon_cmd, CMD_SYNC,
97 sizeof(*send), send);
98
99 send->filter_flags = old_filter;
100
101 return ret;
102 }
103
iwlagn_update_qos(struct iwl_priv * priv,struct iwl_rxon_context * ctx)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_INFO(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_dvm_send_cmd_pdu(priv, ctx->qos_cmd, CMD_SYNC,
126 sizeof(struct iwl_qosparam_cmd),
127 &ctx->qos_data.def_qos_parm);
128 if (ret)
129 IWL_DEBUG_QUIET_RFKILL(priv, "Failed to update QoS\n");
130 }
131
iwlagn_update_beacon(struct iwl_priv * priv,struct ieee80211_vif * vif)132 static int iwlagn_update_beacon(struct iwl_priv *priv,
133 struct ieee80211_vif *vif)
134 {
135 lockdep_assert_held(&priv->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
iwlagn_send_rxon_assoc(struct iwl_priv * priv,struct iwl_rxon_context * ctx)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_dvm_send_cmd_pdu(priv, ctx->rxon_assoc_cmd,
185 CMD_ASYNC, sizeof(rxon_assoc), &rxon_assoc);
186 return ret;
187 }
188
iwlagn_rxon_disconn(struct iwl_priv * priv,struct iwl_rxon_context * ctx)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
iwlagn_rxon_connect(struct iwl_priv * priv,struct iwl_rxon_context * ctx)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_dvm_send_cmd_pdu(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 /* IBSS beacon needs to be sent after setting assoc */
279 if (ctx->vif && (ctx->vif->type == NL80211_IFTYPE_ADHOC))
280 if (iwlagn_update_beacon(priv, ctx->vif))
281 IWL_ERR(priv, "Error sending IBSS beacon\n");
282 iwl_init_sensitivity(priv);
283
284 /*
285 * If we issue a new RXON command which required a tune then
286 * we must send a new TXPOWER command or we won't be able to
287 * Tx any frames.
288 *
289 * It's expected we set power here if channel is changing.
290 */
291 ret = iwl_set_tx_power(priv, priv->tx_power_next, true);
292 if (ret) {
293 IWL_ERR(priv, "Error sending TX power (%d)\n", ret);
294 return ret;
295 }
296
297 if (ctx->vif && ctx->vif->type == NL80211_IFTYPE_STATION &&
298 cfg(priv)->ht_params && cfg(priv)->ht_params->smps_mode)
299 ieee80211_request_smps(ctx->vif,
300 cfg(priv)->ht_params->smps_mode);
301
302 return 0;
303 }
304
iwlagn_set_pan_params(struct iwl_priv * priv)305 int iwlagn_set_pan_params(struct iwl_priv *priv)
306 {
307 struct iwl_wipan_params_cmd cmd;
308 struct iwl_rxon_context *ctx_bss, *ctx_pan;
309 int slot0 = 300, slot1 = 0;
310 int ret;
311
312 if (priv->shrd->valid_contexts == BIT(IWL_RXON_CTX_BSS))
313 return 0;
314
315 BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
316
317 lockdep_assert_held(&priv->mutex);
318
319 ctx_bss = &priv->contexts[IWL_RXON_CTX_BSS];
320 ctx_pan = &priv->contexts[IWL_RXON_CTX_PAN];
321
322 /*
323 * If the PAN context is inactive, then we don't need
324 * to update the PAN parameters, the last thing we'll
325 * have done before it goes inactive is making the PAN
326 * parameters be WLAN-only.
327 */
328 if (!ctx_pan->is_active)
329 return 0;
330
331 memset(&cmd, 0, sizeof(cmd));
332
333 /* only 2 slots are currently allowed */
334 cmd.num_slots = 2;
335
336 cmd.slots[0].type = 0; /* BSS */
337 cmd.slots[1].type = 1; /* PAN */
338
339 if (priv->hw_roc_setup) {
340 /* both contexts must be used for this to happen */
341 slot1 = IWL_MIN_SLOT_TIME;
342 slot0 = 3000;
343 } else if (ctx_bss->vif && ctx_pan->vif) {
344 int bcnint = ctx_pan->beacon_int;
345 int dtim = ctx_pan->vif->bss_conf.dtim_period ?: 1;
346
347 /* should be set, but seems unused?? */
348 cmd.flags |= cpu_to_le16(IWL_WIPAN_PARAMS_FLG_SLOTTED_MODE);
349
350 if (ctx_pan->vif->type == NL80211_IFTYPE_AP &&
351 bcnint &&
352 bcnint != ctx_bss->beacon_int) {
353 IWL_ERR(priv,
354 "beacon intervals don't match (%d, %d)\n",
355 ctx_bss->beacon_int, ctx_pan->beacon_int);
356 } else
357 bcnint = max_t(int, bcnint,
358 ctx_bss->beacon_int);
359 if (!bcnint)
360 bcnint = DEFAULT_BEACON_INTERVAL;
361 slot0 = bcnint / 2;
362 slot1 = bcnint - slot0;
363
364 if (test_bit(STATUS_SCAN_HW, &priv->status) ||
365 (!ctx_bss->vif->bss_conf.idle &&
366 !ctx_bss->vif->bss_conf.assoc)) {
367 slot0 = dtim * bcnint * 3 - IWL_MIN_SLOT_TIME;
368 slot1 = IWL_MIN_SLOT_TIME;
369 } else if (!ctx_pan->vif->bss_conf.idle &&
370 !ctx_pan->vif->bss_conf.assoc) {
371 slot1 = dtim * bcnint * 3 - IWL_MIN_SLOT_TIME;
372 slot0 = IWL_MIN_SLOT_TIME;
373 }
374 } else if (ctx_pan->vif) {
375 slot0 = 0;
376 slot1 = max_t(int, 1, ctx_pan->vif->bss_conf.dtim_period) *
377 ctx_pan->beacon_int;
378 slot1 = max_t(int, DEFAULT_BEACON_INTERVAL, slot1);
379
380 if (test_bit(STATUS_SCAN_HW, &priv->status)) {
381 slot0 = slot1 * 3 - IWL_MIN_SLOT_TIME;
382 slot1 = IWL_MIN_SLOT_TIME;
383 }
384 }
385
386 cmd.slots[0].width = cpu_to_le16(slot0);
387 cmd.slots[1].width = cpu_to_le16(slot1);
388
389 ret = iwl_dvm_send_cmd_pdu(priv, REPLY_WIPAN_PARAMS, CMD_SYNC,
390 sizeof(cmd), &cmd);
391 if (ret)
392 IWL_ERR(priv, "Error setting PAN parameters (%d)\n", ret);
393
394 return ret;
395 }
396
397 /**
398 * iwlagn_commit_rxon - commit staging_rxon to hardware
399 *
400 * The RXON command in staging_rxon is committed to the hardware and
401 * the active_rxon structure is updated with the new data. This
402 * function correctly transitions out of the RXON_ASSOC_MSK state if
403 * a HW tune is required based on the RXON structure changes.
404 *
405 * The connect/disconnect flow should be as the following:
406 *
407 * 1. make sure send RXON command with association bit unset if not connect
408 * this should include the channel and the band for the candidate
409 * to be connected to
410 * 2. Add Station before RXON association with the AP
411 * 3. RXON_timing has to send before RXON for connection
412 * 4. full RXON command - associated bit set
413 * 5. use RXON_ASSOC command to update any flags changes
414 */
iwlagn_commit_rxon(struct iwl_priv * priv,struct iwl_rxon_context * ctx)415 int iwlagn_commit_rxon(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
416 {
417 /* cast away the const for active_rxon in this function */
418 struct iwl_rxon_cmd *active = (void *)&ctx->active;
419 bool new_assoc = !!(ctx->staging.filter_flags & RXON_FILTER_ASSOC_MSK);
420 int ret;
421
422 lockdep_assert_held(&priv->mutex);
423
424 if (!iwl_is_alive(priv))
425 return -EBUSY;
426
427 /* This function hardcodes a bunch of dual-mode assumptions */
428 BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
429
430 if (!ctx->is_active)
431 return 0;
432
433 /* always get timestamp with Rx frame */
434 ctx->staging.flags |= RXON_FLG_TSF2HOST_MSK;
435
436 /*
437 * force CTS-to-self frames protection if RTS-CTS is not preferred
438 * one aggregation protection method
439 */
440 if (!hw_params(priv).use_rts_for_aggregation)
441 ctx->staging.flags |= RXON_FLG_SELF_CTS_EN;
442
443 if ((ctx->vif && ctx->vif->bss_conf.use_short_slot) ||
444 !(ctx->staging.flags & RXON_FLG_BAND_24G_MSK))
445 ctx->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
446 else
447 ctx->staging.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
448
449 iwl_print_rx_config_cmd(priv, ctx->ctxid);
450 ret = iwl_check_rxon_cmd(priv, ctx);
451 if (ret) {
452 IWL_ERR(priv, "Invalid RXON configuration. Not committing.\n");
453 return -EINVAL;
454 }
455
456 /*
457 * receive commit_rxon request
458 * abort any previous channel switch if still in process
459 */
460 if (test_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status) &&
461 (priv->switch_channel != ctx->staging.channel)) {
462 IWL_DEBUG_11H(priv, "abort channel switch on %d\n",
463 le16_to_cpu(priv->switch_channel));
464 iwl_chswitch_done(priv, false);
465 }
466
467 /*
468 * If we don't need to send a full RXON, we can use
469 * iwl_rxon_assoc_cmd which is used to reconfigure filter
470 * and other flags for the current radio configuration.
471 */
472 if (!iwl_full_rxon_required(priv, ctx)) {
473 ret = iwlagn_send_rxon_assoc(priv, ctx);
474 if (ret) {
475 IWL_ERR(priv, "Error setting RXON_ASSOC (%d)\n", ret);
476 return ret;
477 }
478
479 memcpy(active, &ctx->staging, sizeof(*active));
480 /*
481 * We do not commit tx power settings while channel changing,
482 * do it now if after settings changed.
483 */
484 iwl_set_tx_power(priv, priv->tx_power_next, false);
485
486 /* make sure we are in the right PS state */
487 iwl_power_update_mode(priv, true);
488
489 return 0;
490 }
491
492 iwl_set_rxon_hwcrypto(priv, ctx, !iwlagn_mod_params.sw_crypto);
493
494 IWL_DEBUG_INFO(priv,
495 "Going to commit RXON\n"
496 " * with%s RXON_FILTER_ASSOC_MSK\n"
497 " * channel = %d\n"
498 " * bssid = %pM\n",
499 (new_assoc ? "" : "out"),
500 le16_to_cpu(ctx->staging.channel),
501 ctx->staging.bssid_addr);
502
503 /*
504 * Always clear associated first, but with the correct config.
505 * This is required as for example station addition for the
506 * AP station must be done after the BSSID is set to correctly
507 * set up filters in the device.
508 */
509 ret = iwlagn_rxon_disconn(priv, ctx);
510 if (ret)
511 return ret;
512
513 ret = iwlagn_set_pan_params(priv);
514 if (ret)
515 return ret;
516
517 if (new_assoc)
518 return iwlagn_rxon_connect(priv, ctx);
519
520 return 0;
521 }
522
iwlagn_config_ht40(struct ieee80211_conf * conf,struct iwl_rxon_context * ctx)523 void iwlagn_config_ht40(struct ieee80211_conf *conf,
524 struct iwl_rxon_context *ctx)
525 {
526 if (conf_is_ht40_minus(conf)) {
527 ctx->ht.extension_chan_offset =
528 IEEE80211_HT_PARAM_CHA_SEC_BELOW;
529 ctx->ht.is_40mhz = true;
530 } else if (conf_is_ht40_plus(conf)) {
531 ctx->ht.extension_chan_offset =
532 IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
533 ctx->ht.is_40mhz = true;
534 } else {
535 ctx->ht.extension_chan_offset =
536 IEEE80211_HT_PARAM_CHA_SEC_NONE;
537 ctx->ht.is_40mhz = false;
538 }
539 }
540
iwlagn_mac_config(struct ieee80211_hw * hw,u32 changed)541 int iwlagn_mac_config(struct ieee80211_hw *hw, u32 changed)
542 {
543 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
544 struct iwl_rxon_context *ctx;
545 struct ieee80211_conf *conf = &hw->conf;
546 struct ieee80211_channel *channel = conf->channel;
547 const struct iwl_channel_info *ch_info;
548 int ret = 0;
549
550 IWL_DEBUG_MAC80211(priv, "enter: changed %#x", changed);
551
552 mutex_lock(&priv->mutex);
553
554 if (unlikely(test_bit(STATUS_SCANNING, &priv->status))) {
555 IWL_DEBUG_MAC80211(priv, "leave - scanning\n");
556 goto out;
557 }
558
559 if (!iwl_is_ready(priv)) {
560 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
561 goto out;
562 }
563
564 if (changed & (IEEE80211_CONF_CHANGE_SMPS |
565 IEEE80211_CONF_CHANGE_CHANNEL)) {
566 /* mac80211 uses static for non-HT which is what we want */
567 priv->current_ht_config.smps = conf->smps_mode;
568
569 /*
570 * Recalculate chain counts.
571 *
572 * If monitor mode is enabled then mac80211 will
573 * set up the SM PS mode to OFF if an HT channel is
574 * configured.
575 */
576 for_each_context(priv, ctx)
577 iwlagn_set_rxon_chain(priv, ctx);
578 }
579
580 if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
581 ch_info = iwl_get_channel_info(priv, channel->band,
582 channel->hw_value);
583 if (!is_channel_valid(ch_info)) {
584 IWL_DEBUG_MAC80211(priv, "leave - invalid channel\n");
585 ret = -EINVAL;
586 goto out;
587 }
588
589 for_each_context(priv, ctx) {
590 /* Configure HT40 channels */
591 if (ctx->ht.enabled != conf_is_ht(conf))
592 ctx->ht.enabled = conf_is_ht(conf);
593
594 if (ctx->ht.enabled) {
595 /* if HT40 is used, it should not change
596 * after associated except channel switch */
597 if (!ctx->ht.is_40mhz ||
598 !iwl_is_associated_ctx(ctx))
599 iwlagn_config_ht40(conf, ctx);
600 } else
601 ctx->ht.is_40mhz = false;
602
603 /*
604 * Default to no protection. Protection mode will
605 * later be set from BSS config in iwl_ht_conf
606 */
607 ctx->ht.protection = IEEE80211_HT_OP_MODE_PROTECTION_NONE;
608
609 /* if we are switching from ht to 2.4 clear flags
610 * from any ht related info since 2.4 does not
611 * support ht */
612 if (le16_to_cpu(ctx->staging.channel) !=
613 channel->hw_value)
614 ctx->staging.flags = 0;
615
616 iwl_set_rxon_channel(priv, channel, ctx);
617 iwl_set_rxon_ht(priv, &priv->current_ht_config);
618
619 iwl_set_flags_for_band(priv, ctx, channel->band,
620 ctx->vif);
621 }
622
623 iwl_update_bcast_stations(priv);
624
625 /*
626 * The list of supported rates and rate mask can be different
627 * for each band; since the band may have changed, reset
628 * the rate mask to what mac80211 lists.
629 */
630 iwl_set_rate(priv);
631 }
632
633 if (changed & (IEEE80211_CONF_CHANGE_PS |
634 IEEE80211_CONF_CHANGE_IDLE)) {
635 ret = iwl_power_update_mode(priv, false);
636 if (ret)
637 IWL_DEBUG_MAC80211(priv, "Error setting sleep level\n");
638 }
639
640 if (changed & IEEE80211_CONF_CHANGE_POWER) {
641 IWL_DEBUG_MAC80211(priv, "TX Power old=%d new=%d\n",
642 priv->tx_power_user_lmt, conf->power_level);
643
644 iwl_set_tx_power(priv, conf->power_level, false);
645 }
646
647 for_each_context(priv, ctx) {
648 if (!memcmp(&ctx->staging, &ctx->active, sizeof(ctx->staging)))
649 continue;
650 iwlagn_commit_rxon(priv, ctx);
651 }
652 out:
653 mutex_unlock(&priv->mutex);
654 IWL_DEBUG_MAC80211(priv, "leave\n");
655
656 return ret;
657 }
658
iwlagn_check_needed_chains(struct iwl_priv * priv,struct iwl_rxon_context * ctx,struct ieee80211_bss_conf * bss_conf)659 static void iwlagn_check_needed_chains(struct iwl_priv *priv,
660 struct iwl_rxon_context *ctx,
661 struct ieee80211_bss_conf *bss_conf)
662 {
663 struct ieee80211_vif *vif = ctx->vif;
664 struct iwl_rxon_context *tmp;
665 struct ieee80211_sta *sta;
666 struct iwl_ht_config *ht_conf = &priv->current_ht_config;
667 struct ieee80211_sta_ht_cap *ht_cap;
668 bool need_multiple;
669
670 lockdep_assert_held(&priv->mutex);
671
672 switch (vif->type) {
673 case NL80211_IFTYPE_STATION:
674 rcu_read_lock();
675 sta = ieee80211_find_sta(vif, bss_conf->bssid);
676 if (!sta) {
677 /*
678 * If at all, this can only happen through a race
679 * when the AP disconnects us while we're still
680 * setting up the connection, in that case mac80211
681 * will soon tell us about that.
682 */
683 need_multiple = false;
684 rcu_read_unlock();
685 break;
686 }
687
688 ht_cap = &sta->ht_cap;
689
690 need_multiple = true;
691
692 /*
693 * If the peer advertises no support for receiving 2 and 3
694 * stream MCS rates, it can't be transmitting them either.
695 */
696 if (ht_cap->mcs.rx_mask[1] == 0 &&
697 ht_cap->mcs.rx_mask[2] == 0) {
698 need_multiple = false;
699 } else if (!(ht_cap->mcs.tx_params &
700 IEEE80211_HT_MCS_TX_DEFINED)) {
701 /* If it can't TX MCS at all ... */
702 need_multiple = false;
703 } else if (ht_cap->mcs.tx_params &
704 IEEE80211_HT_MCS_TX_RX_DIFF) {
705 int maxstreams;
706
707 /*
708 * But if it can receive them, it might still not
709 * be able to transmit them, which is what we need
710 * to check here -- so check the number of streams
711 * it advertises for TX (if different from RX).
712 */
713
714 maxstreams = (ht_cap->mcs.tx_params &
715 IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK);
716 maxstreams >>=
717 IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT;
718 maxstreams += 1;
719
720 if (maxstreams <= 1)
721 need_multiple = false;
722 }
723
724 rcu_read_unlock();
725 break;
726 case NL80211_IFTYPE_ADHOC:
727 /* currently */
728 need_multiple = false;
729 break;
730 default:
731 /* only AP really */
732 need_multiple = true;
733 break;
734 }
735
736 ctx->ht_need_multiple_chains = need_multiple;
737
738 if (!need_multiple) {
739 /* check all contexts */
740 for_each_context(priv, tmp) {
741 if (!tmp->vif)
742 continue;
743 if (tmp->ht_need_multiple_chains) {
744 need_multiple = true;
745 break;
746 }
747 }
748 }
749
750 ht_conf->single_chain_sufficient = !need_multiple;
751 }
752
iwlagn_chain_noise_reset(struct iwl_priv * priv)753 static void iwlagn_chain_noise_reset(struct iwl_priv *priv)
754 {
755 struct iwl_chain_noise_data *data = &priv->chain_noise_data;
756 int ret;
757
758 if ((data->state == IWL_CHAIN_NOISE_ALIVE) &&
759 iwl_is_any_associated(priv)) {
760 struct iwl_calib_chain_noise_reset_cmd cmd;
761
762 /* clear data for chain noise calibration algorithm */
763 data->chain_noise_a = 0;
764 data->chain_noise_b = 0;
765 data->chain_noise_c = 0;
766 data->chain_signal_a = 0;
767 data->chain_signal_b = 0;
768 data->chain_signal_c = 0;
769 data->beacon_count = 0;
770
771 memset(&cmd, 0, sizeof(cmd));
772 iwl_set_calib_hdr(&cmd.hdr,
773 priv->phy_calib_chain_noise_reset_cmd);
774 ret = iwl_dvm_send_cmd_pdu(priv,
775 REPLY_PHY_CALIBRATION_CMD,
776 CMD_SYNC, sizeof(cmd), &cmd);
777 if (ret)
778 IWL_ERR(priv,
779 "Could not send REPLY_PHY_CALIBRATION_CMD\n");
780 data->state = IWL_CHAIN_NOISE_ACCUMULATE;
781 IWL_DEBUG_CALIB(priv, "Run chain_noise_calibrate\n");
782 }
783 }
784
iwlagn_bss_info_changed(struct ieee80211_hw * hw,struct ieee80211_vif * vif,struct ieee80211_bss_conf * bss_conf,u32 changes)785 void iwlagn_bss_info_changed(struct ieee80211_hw *hw,
786 struct ieee80211_vif *vif,
787 struct ieee80211_bss_conf *bss_conf,
788 u32 changes)
789 {
790 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
791 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
792 int ret;
793 bool force = false;
794
795 mutex_lock(&priv->mutex);
796
797 if (unlikely(!iwl_is_ready(priv))) {
798 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
799 mutex_unlock(&priv->mutex);
800 return;
801 }
802
803 if (unlikely(!ctx->vif)) {
804 IWL_DEBUG_MAC80211(priv, "leave - vif is NULL\n");
805 mutex_unlock(&priv->mutex);
806 return;
807 }
808
809 if (changes & BSS_CHANGED_BEACON_INT)
810 force = true;
811
812 if (changes & BSS_CHANGED_QOS) {
813 ctx->qos_data.qos_active = bss_conf->qos;
814 iwlagn_update_qos(priv, ctx);
815 }
816
817 ctx->staging.assoc_id = cpu_to_le16(vif->bss_conf.aid);
818 if (vif->bss_conf.use_short_preamble)
819 ctx->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
820 else
821 ctx->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
822
823 if (changes & BSS_CHANGED_ASSOC) {
824 if (bss_conf->assoc) {
825 priv->timestamp = bss_conf->last_tsf;
826 ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
827 } else {
828 /*
829 * If we disassociate while there are pending
830 * frames, just wake up the queues and let the
831 * frames "escape" ... This shouldn't really
832 * be happening to start with, but we should
833 * not get stuck in this case either since it
834 * can happen if userspace gets confused.
835 */
836 iwlagn_lift_passive_no_rx(priv);
837
838 ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
839
840 if (ctx->ctxid == IWL_RXON_CTX_BSS)
841 priv->have_rekey_data = false;
842 }
843
844 iwlagn_bt_coex_rssi_monitor(priv);
845 }
846
847 if (ctx->ht.enabled) {
848 ctx->ht.protection = bss_conf->ht_operation_mode &
849 IEEE80211_HT_OP_MODE_PROTECTION;
850 ctx->ht.non_gf_sta_present = !!(bss_conf->ht_operation_mode &
851 IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT);
852 iwlagn_check_needed_chains(priv, ctx, bss_conf);
853 iwl_set_rxon_ht(priv, &priv->current_ht_config);
854 }
855
856 iwlagn_set_rxon_chain(priv, ctx);
857
858 if (bss_conf->use_cts_prot && (priv->band != IEEE80211_BAND_5GHZ))
859 ctx->staging.flags |= RXON_FLG_TGG_PROTECT_MSK;
860 else
861 ctx->staging.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
862
863 if (bss_conf->use_cts_prot)
864 ctx->staging.flags |= RXON_FLG_SELF_CTS_EN;
865 else
866 ctx->staging.flags &= ~RXON_FLG_SELF_CTS_EN;
867
868 memcpy(ctx->staging.bssid_addr, bss_conf->bssid, ETH_ALEN);
869
870 if (vif->type == NL80211_IFTYPE_AP ||
871 vif->type == NL80211_IFTYPE_ADHOC) {
872 if (vif->bss_conf.enable_beacon) {
873 ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
874 priv->beacon_ctx = ctx;
875 } else {
876 ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
877 priv->beacon_ctx = NULL;
878 }
879 }
880
881 /*
882 * If the ucode decides to do beacon filtering before
883 * association, it will lose beacons that are needed
884 * before sending frames out on passive channels. This
885 * causes association failures on those channels. Enable
886 * receiving beacons in such cases.
887 */
888
889 if (vif->type == NL80211_IFTYPE_STATION) {
890 if (!bss_conf->assoc)
891 ctx->staging.filter_flags |= RXON_FILTER_BCON_AWARE_MSK;
892 else
893 ctx->staging.filter_flags &=
894 ~RXON_FILTER_BCON_AWARE_MSK;
895 }
896
897 if (force || memcmp(&ctx->staging, &ctx->active, sizeof(ctx->staging)))
898 iwlagn_commit_rxon(priv, ctx);
899
900 if (changes & BSS_CHANGED_ASSOC && bss_conf->assoc) {
901 /*
902 * The chain noise calibration will enable PM upon
903 * completion. If calibration has already been run
904 * then we need to enable power management here.
905 */
906 if (priv->chain_noise_data.state == IWL_CHAIN_NOISE_DONE)
907 iwl_power_update_mode(priv, false);
908
909 /* Enable RX differential gain and sensitivity calibrations */
910 if (!priv->disable_chain_noise_cal)
911 iwlagn_chain_noise_reset(priv);
912 priv->start_calib = 1;
913 }
914
915 if (changes & BSS_CHANGED_IBSS) {
916 ret = iwlagn_manage_ibss_station(priv, vif,
917 bss_conf->ibss_joined);
918 if (ret)
919 IWL_ERR(priv, "failed to %s IBSS station %pM\n",
920 bss_conf->ibss_joined ? "add" : "remove",
921 bss_conf->bssid);
922 }
923
924 if (changes & BSS_CHANGED_BEACON && vif->type == NL80211_IFTYPE_ADHOC &&
925 priv->beacon_ctx) {
926 if (iwlagn_update_beacon(priv, vif))
927 IWL_ERR(priv, "Error sending IBSS beacon\n");
928 }
929
930 mutex_unlock(&priv->mutex);
931 }
932
iwlagn_post_scan(struct iwl_priv * priv)933 void iwlagn_post_scan(struct iwl_priv *priv)
934 {
935 struct iwl_rxon_context *ctx;
936
937 /*
938 * We do not commit power settings while scan is pending,
939 * do it now if the settings changed.
940 */
941 iwl_power_set_mode(priv, &priv->power_data.sleep_cmd_next, false);
942 iwl_set_tx_power(priv, priv->tx_power_next, false);
943
944 /*
945 * Since setting the RXON may have been deferred while
946 * performing the scan, fire one off if needed
947 */
948 for_each_context(priv, ctx)
949 if (memcmp(&ctx->staging, &ctx->active, sizeof(ctx->staging)))
950 iwlagn_commit_rxon(priv, ctx);
951
952 iwlagn_set_pan_params(priv);
953 }
954