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Diffstat (limited to 'drivers/net/wireless/iwlwifi/iwl-agn-rxon.c')
-rw-r--r--drivers/net/wireless/iwlwifi/iwl-agn-rxon.c965
1 files changed, 965 insertions, 0 deletions
diff --git a/drivers/net/wireless/iwlwifi/iwl-agn-rxon.c b/drivers/net/wireless/iwlwifi/iwl-agn-rxon.c
new file mode 100644
index 00000000000..5493f94d23c
--- /dev/null
+++ b/drivers/net/wireless/iwlwifi/iwl-agn-rxon.c
@@ -0,0 +1,965 @@
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 && 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
545void iwlagn_config_ht40(struct ieee80211_conf *conf,
546 struct iwl_rxon_context *ctx)
547{
548 if (conf_is_ht40_minus(conf)) {
549 ctx->ht.extension_chan_offset =
550 IEEE80211_HT_PARAM_CHA_SEC_BELOW;
551 ctx->ht.is_40mhz = true;
552 } else if (conf_is_ht40_plus(conf)) {
553 ctx->ht.extension_chan_offset =
554 IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
555 ctx->ht.is_40mhz = true;
556 } else {
557 ctx->ht.extension_chan_offset =
558 IEEE80211_HT_PARAM_CHA_SEC_NONE;
559 ctx->ht.is_40mhz = false;
560 }
561}
562
563int iwlagn_mac_config(struct ieee80211_hw *hw, u32 changed)
564{
565 struct iwl_priv *priv = hw->priv;
566 struct iwl_rxon_context *ctx;
567 struct ieee80211_conf *conf = &hw->conf;
568 struct ieee80211_channel *channel = conf->channel;
569 const struct iwl_channel_info *ch_info;
570 int ret = 0;
571
572 IWL_DEBUG_MAC80211(priv, "changed %#x", changed);
573
574 mutex_lock(&priv->mutex);
575
576 if (unlikely(test_bit(STATUS_SCANNING, &priv->status))) {
577 IWL_DEBUG_MAC80211(priv, "leave - scanning\n");
578 goto out;
579 }
580
581 if (!iwl_is_ready(priv)) {
582 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
583 goto out;
584 }
585
586 if (changed & (IEEE80211_CONF_CHANGE_SMPS |
587 IEEE80211_CONF_CHANGE_CHANNEL)) {
588 /* mac80211 uses static for non-HT which is what we want */
589 priv->current_ht_config.smps = conf->smps_mode;
590
591 /*
592 * Recalculate chain counts.
593 *
594 * If monitor mode is enabled then mac80211 will
595 * set up the SM PS mode to OFF if an HT channel is
596 * configured.
597 */
598 for_each_context(priv, ctx)
599 iwlagn_set_rxon_chain(priv, ctx);
600 }
601
602 if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
603 unsigned long flags;
604
605 ch_info = iwl_get_channel_info(priv, channel->band,
606 channel->hw_value);
607 if (!is_channel_valid(ch_info)) {
608 IWL_DEBUG_MAC80211(priv, "leave - invalid channel\n");
609 ret = -EINVAL;
610 goto out;
611 }
612
613 spin_lock_irqsave(&priv->lock, flags);
614
615 for_each_context(priv, ctx) {
616 /* Configure HT40 channels */
617 if (ctx->ht.enabled != conf_is_ht(conf))
618 ctx->ht.enabled = conf_is_ht(conf);
619
620 if (ctx->ht.enabled) {
621 /* if HT40 is used, it should not change
622 * after associated except channel switch */
623 if (!ctx->ht.is_40mhz ||
624 !iwl_is_associated_ctx(ctx))
625 iwlagn_config_ht40(conf, ctx);
626 } else
627 ctx->ht.is_40mhz = false;
628
629 /*
630 * Default to no protection. Protection mode will
631 * later be set from BSS config in iwl_ht_conf
632 */
633 ctx->ht.protection = IEEE80211_HT_OP_MODE_PROTECTION_NONE;
634
635 /* if we are switching from ht to 2.4 clear flags
636 * from any ht related info since 2.4 does not
637 * support ht */
638 if (le16_to_cpu(ctx->staging.channel) !=
639 channel->hw_value)
640 ctx->staging.flags = 0;
641
642 iwl_set_rxon_channel(priv, channel, ctx);
643 iwl_set_rxon_ht(priv, &priv->current_ht_config);
644
645 iwl_set_flags_for_band(priv, ctx, channel->band,
646 ctx->vif);
647 }
648
649 spin_unlock_irqrestore(&priv->lock, flags);
650
651 iwl_update_bcast_stations(priv);
652
653 /*
654 * The list of supported rates and rate mask can be different
655 * for each band; since the band may have changed, reset
656 * the rate mask to what mac80211 lists.
657 */
658 iwl_set_rate(priv);
659 }
660
661 if (changed & (IEEE80211_CONF_CHANGE_PS |
662 IEEE80211_CONF_CHANGE_IDLE)) {
663 ret = iwl_power_update_mode(priv, false);
664 if (ret)
665 IWL_DEBUG_MAC80211(priv, "Error setting sleep level\n");
666 }
667
668 if (changed & IEEE80211_CONF_CHANGE_POWER) {
669 IWL_DEBUG_MAC80211(priv, "TX Power old=%d new=%d\n",
670 priv->tx_power_user_lmt, conf->power_level);
671
672 iwl_set_tx_power(priv, conf->power_level, false);
673 }
674
675 for_each_context(priv, ctx) {
676 if (!memcmp(&ctx->staging, &ctx->active, sizeof(ctx->staging)))
677 continue;
678 iwlagn_commit_rxon(priv, ctx);
679 }
680 out:
681 mutex_unlock(&priv->mutex);
682 return ret;
683}
684
685static void iwlagn_check_needed_chains(struct iwl_priv *priv,
686 struct iwl_rxon_context *ctx,
687 struct ieee80211_bss_conf *bss_conf)
688{
689 struct ieee80211_vif *vif = ctx->vif;
690 struct iwl_rxon_context *tmp;
691 struct ieee80211_sta *sta;
692 struct iwl_ht_config *ht_conf = &priv->current_ht_config;
693 struct ieee80211_sta_ht_cap *ht_cap;
694 bool need_multiple;
695
696 lockdep_assert_held(&priv->mutex);
697
698 switch (vif->type) {
699 case NL80211_IFTYPE_STATION:
700 rcu_read_lock();
701 sta = ieee80211_find_sta(vif, bss_conf->bssid);
702 if (!sta) {
703 /*
704 * If at all, this can only happen through a race
705 * when the AP disconnects us while we're still
706 * setting up the connection, in that case mac80211
707 * will soon tell us about that.
708 */
709 need_multiple = false;
710 rcu_read_unlock();
711 break;
712 }
713
714 ht_cap = &sta->ht_cap;
715
716 need_multiple = true;
717
718 /*
719 * If the peer advertises no support for receiving 2 and 3
720 * stream MCS rates, it can't be transmitting them either.
721 */
722 if (ht_cap->mcs.rx_mask[1] == 0 &&
723 ht_cap->mcs.rx_mask[2] == 0) {
724 need_multiple = false;
725 } else if (!(ht_cap->mcs.tx_params &
726 IEEE80211_HT_MCS_TX_DEFINED)) {
727 /* If it can't TX MCS at all ... */
728 need_multiple = false;
729 } else if (ht_cap->mcs.tx_params &
730 IEEE80211_HT_MCS_TX_RX_DIFF) {
731 int maxstreams;
732
733 /*
734 * But if it can receive them, it might still not
735 * be able to transmit them, which is what we need
736 * to check here -- so check the number of streams
737 * it advertises for TX (if different from RX).
738 */
739
740 maxstreams = (ht_cap->mcs.tx_params &
741 IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK);
742 maxstreams >>=
743 IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT;
744 maxstreams += 1;
745
746 if (maxstreams <= 1)
747 need_multiple = false;
748 }
749
750 rcu_read_unlock();
751 break;
752 case NL80211_IFTYPE_ADHOC:
753 /* currently */
754 need_multiple = false;
755 break;
756 default:
757 /* only AP really */
758 need_multiple = true;
759 break;
760 }
761
762 ctx->ht_need_multiple_chains = need_multiple;
763
764 if (!need_multiple) {
765 /* check all contexts */
766 for_each_context(priv, tmp) {
767 if (!tmp->vif)
768 continue;
769 if (tmp->ht_need_multiple_chains) {
770 need_multiple = true;
771 break;
772 }
773 }
774 }
775
776 ht_conf->single_chain_sufficient = !need_multiple;
777}
778
779static void iwlagn_chain_noise_reset(struct iwl_priv *priv)
780{
781 struct iwl_chain_noise_data *data = &priv->chain_noise_data;
782 int ret;
783
784 if ((data->state == IWL_CHAIN_NOISE_ALIVE) &&
785 iwl_is_any_associated(priv)) {
786 struct iwl_calib_chain_noise_reset_cmd cmd;
787
788 /* clear data for chain noise calibration algorithm */
789 data->chain_noise_a = 0;
790 data->chain_noise_b = 0;
791 data->chain_noise_c = 0;
792 data->chain_signal_a = 0;
793 data->chain_signal_b = 0;
794 data->chain_signal_c = 0;
795 data->beacon_count = 0;
796
797 memset(&cmd, 0, sizeof(cmd));
798 iwl_set_calib_hdr(&cmd.hdr,
799 priv->phy_calib_chain_noise_reset_cmd);
800 ret = trans_send_cmd_pdu(&priv->trans,
801 REPLY_PHY_CALIBRATION_CMD,
802 CMD_SYNC, sizeof(cmd), &cmd);
803 if (ret)
804 IWL_ERR(priv,
805 "Could not send REPLY_PHY_CALIBRATION_CMD\n");
806 data->state = IWL_CHAIN_NOISE_ACCUMULATE;
807 IWL_DEBUG_CALIB(priv, "Run chain_noise_calibrate\n");
808 }
809}
810
811void iwlagn_bss_info_changed(struct ieee80211_hw *hw,
812 struct ieee80211_vif *vif,
813 struct ieee80211_bss_conf *bss_conf,
814 u32 changes)
815{
816 struct iwl_priv *priv = hw->priv;
817 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
818 int ret;
819 bool force = false;
820
821 mutex_lock(&priv->mutex);
822
823 if (unlikely(!iwl_is_ready(priv))) {
824 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
825 mutex_unlock(&priv->mutex);
826 return;
827 }
828
829 if (unlikely(!ctx->vif)) {
830 IWL_DEBUG_MAC80211(priv, "leave - vif is NULL\n");
831 mutex_unlock(&priv->mutex);
832 return;
833 }
834
835 if (changes & BSS_CHANGED_BEACON_INT)
836 force = true;
837
838 if (changes & BSS_CHANGED_QOS) {
839 ctx->qos_data.qos_active = bss_conf->qos;
840 iwlagn_update_qos(priv, ctx);
841 }
842
843 ctx->staging.assoc_id = cpu_to_le16(vif->bss_conf.aid);
844 if (vif->bss_conf.use_short_preamble)
845 ctx->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
846 else
847 ctx->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
848
849 if (changes & BSS_CHANGED_ASSOC) {
850 if (bss_conf->assoc) {
851 priv->timestamp = bss_conf->timestamp;
852 ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
853 } else {
854 /*
855 * If we disassociate while there are pending
856 * frames, just wake up the queues and let the
857 * frames "escape" ... This shouldn't really
858 * be happening to start with, but we should
859 * not get stuck in this case either since it
860 * can happen if userspace gets confused.
861 */
862 if (ctx->last_tx_rejected) {
863 ctx->last_tx_rejected = false;
864 iwl_wake_any_queue(priv, ctx);
865 }
866 ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
867
868 if (ctx->ctxid == IWL_RXON_CTX_BSS)
869 priv->have_rekey_data = false;
870 }
871
872 iwlagn_bt_coex_rssi_monitor(priv);
873 }
874
875 if (ctx->ht.enabled) {
876 ctx->ht.protection = bss_conf->ht_operation_mode &
877 IEEE80211_HT_OP_MODE_PROTECTION;
878 ctx->ht.non_gf_sta_present = !!(bss_conf->ht_operation_mode &
879 IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT);
880 iwlagn_check_needed_chains(priv, ctx, bss_conf);
881 iwl_set_rxon_ht(priv, &priv->current_ht_config);
882 }
883
884 iwlagn_set_rxon_chain(priv, ctx);
885
886 if (bss_conf->use_cts_prot && (priv->band != IEEE80211_BAND_5GHZ))
887 ctx->staging.flags |= RXON_FLG_TGG_PROTECT_MSK;
888 else
889 ctx->staging.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
890
891 if (bss_conf->use_cts_prot)
892 ctx->staging.flags |= RXON_FLG_SELF_CTS_EN;
893 else
894 ctx->staging.flags &= ~RXON_FLG_SELF_CTS_EN;
895
896 memcpy(ctx->staging.bssid_addr, bss_conf->bssid, ETH_ALEN);
897
898 if (vif->type == NL80211_IFTYPE_AP ||
899 vif->type == NL80211_IFTYPE_ADHOC) {
900 if (vif->bss_conf.enable_beacon) {
901 ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
902 priv->beacon_ctx = ctx;
903 } else {
904 ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
905 priv->beacon_ctx = NULL;
906 }
907 }
908
909 if (force || memcmp(&ctx->staging, &ctx->active, sizeof(ctx->staging)))
910 iwlagn_commit_rxon(priv, ctx);
911
912 if (changes & BSS_CHANGED_ASSOC && bss_conf->assoc) {
913 /*
914 * The chain noise calibration will enable PM upon
915 * completion. If calibration has already been run
916 * then we need to enable power management here.
917 */
918 if (priv->chain_noise_data.state == IWL_CHAIN_NOISE_DONE)
919 iwl_power_update_mode(priv, false);
920
921 /* Enable RX differential gain and sensitivity calibrations */
922 if (!priv->disable_chain_noise_cal)
923 iwlagn_chain_noise_reset(priv);
924 priv->start_calib = 1;
925 }
926
927 if (changes & BSS_CHANGED_IBSS) {
928 ret = iwlagn_manage_ibss_station(priv, vif,
929 bss_conf->ibss_joined);
930 if (ret)
931 IWL_ERR(priv, "failed to %s IBSS station %pM\n",
932 bss_conf->ibss_joined ? "add" : "remove",
933 bss_conf->bssid);
934 }
935
936 if (changes & BSS_CHANGED_BEACON && vif->type == NL80211_IFTYPE_ADHOC &&
937 priv->beacon_ctx) {
938 if (iwlagn_update_beacon(priv, vif))
939 IWL_ERR(priv, "Error sending IBSS beacon\n");
940 }
941
942 mutex_unlock(&priv->mutex);
943}
944
945void iwlagn_post_scan(struct iwl_priv *priv)
946{
947 struct iwl_rxon_context *ctx;
948
949 /*
950 * We do not commit power settings while scan is pending,
951 * do it now if the settings changed.
952 */
953 iwl_power_set_mode(priv, &priv->power_data.sleep_cmd_next, false);
954 iwl_set_tx_power(priv, priv->tx_power_next, false);
955
956 /*
957 * Since setting the RXON may have been deferred while
958 * performing the scan, fire one off if needed
959 */
960 for_each_context(priv, ctx)
961 if (memcmp(&ctx->staging, &ctx->active, sizeof(ctx->staging)))
962 iwlagn_commit_rxon(priv, ctx);
963
964 iwlagn_set_pan_params(priv);
965}
generated by cgit v1.2.2 (git 2.25.0) at 2025-03-22 03:58:33 -0400