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iwlwifi: move iwl_print_rx_config_cmd to iwl-agn-rxon.c
[deliverable/linux.git] / drivers / net / wireless / iwlwifi / iwl-agn-rxon.c
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 <linux/etherdevice.h>
28 #include "iwl-dev.h"
29 #include "iwl-agn.h"
30 #include "iwl-core.h"
31 #include "iwl-agn-calib.h"
32 #include "iwl-trans.h"
33 #include "iwl-shared.h"
34
35 /*
36 * initialize rxon structure with default values from eeprom
37 */
38 void iwl_connection_init_rx_config(struct iwl_priv *priv,
39 struct iwl_rxon_context *ctx)
40 {
41 const struct iwl_channel_info *ch_info;
42
43 memset(&ctx->staging, 0, sizeof(ctx->staging));
44
45 if (!ctx->vif) {
46 ctx->staging.dev_type = ctx->unused_devtype;
47 } else
48 switch (ctx->vif->type) {
49 case NL80211_IFTYPE_AP:
50 ctx->staging.dev_type = ctx->ap_devtype;
51 break;
52
53 case NL80211_IFTYPE_STATION:
54 ctx->staging.dev_type = ctx->station_devtype;
55 ctx->staging.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
56 break;
57
58 case NL80211_IFTYPE_ADHOC:
59 ctx->staging.dev_type = ctx->ibss_devtype;
60 ctx->staging.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
61 ctx->staging.filter_flags = RXON_FILTER_BCON_AWARE_MSK |
62 RXON_FILTER_ACCEPT_GRP_MSK;
63 break;
64
65 default:
66 IWL_ERR(priv, "Unsupported interface type %d\n",
67 ctx->vif->type);
68 break;
69 }
70
71 #if 0
72 /* TODO: Figure out when short_preamble would be set and cache from
73 * that */
74 if (!hw_to_local(priv->hw)->short_preamble)
75 ctx->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
76 else
77 ctx->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
78 #endif
79
80 ch_info = iwl_get_channel_info(priv, priv->band,
81 le16_to_cpu(ctx->active.channel));
82
83 if (!ch_info)
84 ch_info = &priv->channel_info[0];
85
86 ctx->staging.channel = cpu_to_le16(ch_info->channel);
87 priv->band = ch_info->band;
88
89 iwl_set_flags_for_band(priv, ctx, priv->band, ctx->vif);
90
91 ctx->staging.ofdm_basic_rates =
92 (IWL_OFDM_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
93 ctx->staging.cck_basic_rates =
94 (IWL_CCK_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
95
96 /* clear both MIX and PURE40 mode flag */
97 ctx->staging.flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED |
98 RXON_FLG_CHANNEL_MODE_PURE_40);
99 if (ctx->vif)
100 memcpy(ctx->staging.node_addr, ctx->vif->addr, ETH_ALEN);
101
102 ctx->staging.ofdm_ht_single_stream_basic_rates = 0xff;
103 ctx->staging.ofdm_ht_dual_stream_basic_rates = 0xff;
104 ctx->staging.ofdm_ht_triple_stream_basic_rates = 0xff;
105 }
106
107 static int iwlagn_disable_bss(struct iwl_priv *priv,
108 struct iwl_rxon_context *ctx,
109 struct iwl_rxon_cmd *send)
110 {
111 __le32 old_filter = send->filter_flags;
112 int ret;
113
114 send->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
115 ret = iwl_dvm_send_cmd_pdu(priv, ctx->rxon_cmd,
116 CMD_SYNC, sizeof(*send), send);
117
118 send->filter_flags = old_filter;
119
120 if (ret)
121 IWL_DEBUG_QUIET_RFKILL(priv,
122 "Error clearing ASSOC_MSK on BSS (%d)\n", ret);
123
124 return ret;
125 }
126
127 static int iwlagn_disable_pan(struct iwl_priv *priv,
128 struct iwl_rxon_context *ctx,
129 struct iwl_rxon_cmd *send)
130 {
131 struct iwl_notification_wait disable_wait;
132 __le32 old_filter = send->filter_flags;
133 u8 old_dev_type = send->dev_type;
134 int ret;
135 static const u8 deactivate_cmd[] = {
136 REPLY_WIPAN_DEACTIVATION_COMPLETE
137 };
138
139 iwl_init_notification_wait(&priv->notif_wait, &disable_wait,
140 deactivate_cmd, ARRAY_SIZE(deactivate_cmd),
141 NULL, NULL);
142
143 send->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
144 send->dev_type = RXON_DEV_TYPE_P2P;
145 ret = iwl_dvm_send_cmd_pdu(priv, ctx->rxon_cmd,
146 CMD_SYNC, sizeof(*send), send);
147
148 send->filter_flags = old_filter;
149 send->dev_type = old_dev_type;
150
151 if (ret) {
152 IWL_ERR(priv, "Error disabling PAN (%d)\n", ret);
153 iwl_remove_notification(&priv->notif_wait, &disable_wait);
154 } else {
155 ret = iwl_wait_notification(&priv->notif_wait,
156 &disable_wait, HZ);
157 if (ret)
158 IWL_ERR(priv, "Timed out waiting for PAN disable\n");
159 }
160
161 return ret;
162 }
163
164 static int iwlagn_disconn_pan(struct iwl_priv *priv,
165 struct iwl_rxon_context *ctx,
166 struct iwl_rxon_cmd *send)
167 {
168 __le32 old_filter = send->filter_flags;
169 int ret;
170
171 send->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
172 ret = iwl_dvm_send_cmd_pdu(priv, ctx->rxon_cmd, CMD_SYNC,
173 sizeof(*send), send);
174
175 send->filter_flags = old_filter;
176
177 return ret;
178 }
179
180 static void iwlagn_update_qos(struct iwl_priv *priv,
181 struct iwl_rxon_context *ctx)
182 {
183 int ret;
184
185 if (!ctx->is_active)
186 return;
187
188 ctx->qos_data.def_qos_parm.qos_flags = 0;
189
190 if (ctx->qos_data.qos_active)
191 ctx->qos_data.def_qos_parm.qos_flags |=
192 QOS_PARAM_FLG_UPDATE_EDCA_MSK;
193
194 if (ctx->ht.enabled)
195 ctx->qos_data.def_qos_parm.qos_flags |= QOS_PARAM_FLG_TGN_MSK;
196
197 IWL_DEBUG_INFO(priv, "send QoS cmd with Qos active=%d FLAGS=0x%X\n",
198 ctx->qos_data.qos_active,
199 ctx->qos_data.def_qos_parm.qos_flags);
200
201 ret = iwl_dvm_send_cmd_pdu(priv, ctx->qos_cmd, CMD_SYNC,
202 sizeof(struct iwl_qosparam_cmd),
203 &ctx->qos_data.def_qos_parm);
204 if (ret)
205 IWL_DEBUG_QUIET_RFKILL(priv, "Failed to update QoS\n");
206 }
207
208 static int iwlagn_update_beacon(struct iwl_priv *priv,
209 struct ieee80211_vif *vif)
210 {
211 lockdep_assert_held(&priv->mutex);
212
213 dev_kfree_skb(priv->beacon_skb);
214 priv->beacon_skb = ieee80211_beacon_get(priv->hw, vif);
215 if (!priv->beacon_skb)
216 return -ENOMEM;
217 return iwlagn_send_beacon_cmd(priv);
218 }
219
220 static int iwlagn_send_rxon_assoc(struct iwl_priv *priv,
221 struct iwl_rxon_context *ctx)
222 {
223 int ret = 0;
224 struct iwl_rxon_assoc_cmd rxon_assoc;
225 const struct iwl_rxon_cmd *rxon1 = &ctx->staging;
226 const struct iwl_rxon_cmd *rxon2 = &ctx->active;
227
228 if ((rxon1->flags == rxon2->flags) &&
229 (rxon1->filter_flags == rxon2->filter_flags) &&
230 (rxon1->cck_basic_rates == rxon2->cck_basic_rates) &&
231 (rxon1->ofdm_ht_single_stream_basic_rates ==
232 rxon2->ofdm_ht_single_stream_basic_rates) &&
233 (rxon1->ofdm_ht_dual_stream_basic_rates ==
234 rxon2->ofdm_ht_dual_stream_basic_rates) &&
235 (rxon1->ofdm_ht_triple_stream_basic_rates ==
236 rxon2->ofdm_ht_triple_stream_basic_rates) &&
237 (rxon1->acquisition_data == rxon2->acquisition_data) &&
238 (rxon1->rx_chain == rxon2->rx_chain) &&
239 (rxon1->ofdm_basic_rates == rxon2->ofdm_basic_rates)) {
240 IWL_DEBUG_INFO(priv, "Using current RXON_ASSOC. Not resending.\n");
241 return 0;
242 }
243
244 rxon_assoc.flags = ctx->staging.flags;
245 rxon_assoc.filter_flags = ctx->staging.filter_flags;
246 rxon_assoc.ofdm_basic_rates = ctx->staging.ofdm_basic_rates;
247 rxon_assoc.cck_basic_rates = ctx->staging.cck_basic_rates;
248 rxon_assoc.reserved1 = 0;
249 rxon_assoc.reserved2 = 0;
250 rxon_assoc.reserved3 = 0;
251 rxon_assoc.ofdm_ht_single_stream_basic_rates =
252 ctx->staging.ofdm_ht_single_stream_basic_rates;
253 rxon_assoc.ofdm_ht_dual_stream_basic_rates =
254 ctx->staging.ofdm_ht_dual_stream_basic_rates;
255 rxon_assoc.rx_chain_select_flags = ctx->staging.rx_chain;
256 rxon_assoc.ofdm_ht_triple_stream_basic_rates =
257 ctx->staging.ofdm_ht_triple_stream_basic_rates;
258 rxon_assoc.acquisition_data = ctx->staging.acquisition_data;
259
260 ret = iwl_dvm_send_cmd_pdu(priv, ctx->rxon_assoc_cmd,
261 CMD_ASYNC, sizeof(rxon_assoc), &rxon_assoc);
262 return ret;
263 }
264
265 static u16 iwl_adjust_beacon_interval(u16 beacon_val, u16 max_beacon_val)
266 {
267 u16 new_val;
268 u16 beacon_factor;
269
270 /*
271 * If mac80211 hasn't given us a beacon interval, program
272 * the default into the device (not checking this here
273 * would cause the adjustment below to return the maximum
274 * value, which may break PAN.)
275 */
276 if (!beacon_val)
277 return DEFAULT_BEACON_INTERVAL;
278
279 /*
280 * If the beacon interval we obtained from the peer
281 * is too large, we'll have to wake up more often
282 * (and in IBSS case, we'll beacon too much)
283 *
284 * For example, if max_beacon_val is 4096, and the
285 * requested beacon interval is 7000, we'll have to
286 * use 3500 to be able to wake up on the beacons.
287 *
288 * This could badly influence beacon detection stats.
289 */
290
291 beacon_factor = (beacon_val + max_beacon_val) / max_beacon_val;
292 new_val = beacon_val / beacon_factor;
293
294 if (!new_val)
295 new_val = max_beacon_val;
296
297 return new_val;
298 }
299
300 static int iwl_send_rxon_timing(struct iwl_priv *priv,
301 struct iwl_rxon_context *ctx)
302 {
303 u64 tsf;
304 s32 interval_tm, rem;
305 struct ieee80211_conf *conf = NULL;
306 u16 beacon_int;
307 struct ieee80211_vif *vif = ctx->vif;
308
309 conf = &priv->hw->conf;
310
311 lockdep_assert_held(&priv->mutex);
312
313 memset(&ctx->timing, 0, sizeof(struct iwl_rxon_time_cmd));
314
315 ctx->timing.timestamp = cpu_to_le64(priv->timestamp);
316 ctx->timing.listen_interval = cpu_to_le16(conf->listen_interval);
317
318 beacon_int = vif ? vif->bss_conf.beacon_int : 0;
319
320 /*
321 * TODO: For IBSS we need to get atim_window from mac80211,
322 * for now just always use 0
323 */
324 ctx->timing.atim_window = 0;
325
326 if (ctx->ctxid == IWL_RXON_CTX_PAN &&
327 (!ctx->vif || ctx->vif->type != NL80211_IFTYPE_STATION) &&
328 iwl_is_associated(priv, IWL_RXON_CTX_BSS) &&
329 priv->contexts[IWL_RXON_CTX_BSS].vif &&
330 priv->contexts[IWL_RXON_CTX_BSS].vif->bss_conf.beacon_int) {
331 ctx->timing.beacon_interval =
332 priv->contexts[IWL_RXON_CTX_BSS].timing.beacon_interval;
333 beacon_int = le16_to_cpu(ctx->timing.beacon_interval);
334 } else if (ctx->ctxid == IWL_RXON_CTX_BSS &&
335 iwl_is_associated(priv, IWL_RXON_CTX_PAN) &&
336 priv->contexts[IWL_RXON_CTX_PAN].vif &&
337 priv->contexts[IWL_RXON_CTX_PAN].vif->bss_conf.beacon_int &&
338 (!iwl_is_associated_ctx(ctx) || !ctx->vif ||
339 !ctx->vif->bss_conf.beacon_int)) {
340 ctx->timing.beacon_interval =
341 priv->contexts[IWL_RXON_CTX_PAN].timing.beacon_interval;
342 beacon_int = le16_to_cpu(ctx->timing.beacon_interval);
343 } else {
344 beacon_int = iwl_adjust_beacon_interval(beacon_int,
345 IWL_MAX_UCODE_BEACON_INTERVAL * TIME_UNIT);
346 ctx->timing.beacon_interval = cpu_to_le16(beacon_int);
347 }
348
349 ctx->beacon_int = beacon_int;
350
351 tsf = priv->timestamp; /* tsf is modifed by do_div: copy it */
352 interval_tm = beacon_int * TIME_UNIT;
353 rem = do_div(tsf, interval_tm);
354 ctx->timing.beacon_init_val = cpu_to_le32(interval_tm - rem);
355
356 ctx->timing.dtim_period = vif ? (vif->bss_conf.dtim_period ?: 1) : 1;
357
358 IWL_DEBUG_ASSOC(priv,
359 "beacon interval %d beacon timer %d beacon tim %d\n",
360 le16_to_cpu(ctx->timing.beacon_interval),
361 le32_to_cpu(ctx->timing.beacon_init_val),
362 le16_to_cpu(ctx->timing.atim_window));
363
364 return iwl_dvm_send_cmd_pdu(priv, ctx->rxon_timing_cmd,
365 CMD_SYNC, sizeof(ctx->timing), &ctx->timing);
366 }
367
368 static int iwlagn_rxon_disconn(struct iwl_priv *priv,
369 struct iwl_rxon_context *ctx)
370 {
371 int ret;
372 struct iwl_rxon_cmd *active = (void *)&ctx->active;
373
374 if (ctx->ctxid == IWL_RXON_CTX_BSS) {
375 ret = iwlagn_disable_bss(priv, ctx, &ctx->staging);
376 } else {
377 ret = iwlagn_disable_pan(priv, ctx, &ctx->staging);
378 if (ret)
379 return ret;
380 if (ctx->vif) {
381 ret = iwl_send_rxon_timing(priv, ctx);
382 if (ret) {
383 IWL_ERR(priv, "Failed to send timing (%d)!\n", ret);
384 return ret;
385 }
386 ret = iwlagn_disconn_pan(priv, ctx, &ctx->staging);
387 }
388 }
389 if (ret)
390 return ret;
391
392 /*
393 * Un-assoc RXON clears the station table and WEP
394 * keys, so we have to restore those afterwards.
395 */
396 iwl_clear_ucode_stations(priv, ctx);
397 /* update -- might need P2P now */
398 iwl_update_bcast_station(priv, ctx);
399 iwl_restore_stations(priv, ctx);
400 ret = iwl_restore_default_wep_keys(priv, ctx);
401 if (ret) {
402 IWL_ERR(priv, "Failed to restore WEP keys (%d)\n", ret);
403 return ret;
404 }
405
406 memcpy(active, &ctx->staging, sizeof(*active));
407 return 0;
408 }
409
410 static int iwl_set_tx_power(struct iwl_priv *priv, s8 tx_power, bool force)
411 {
412 int ret;
413 s8 prev_tx_power;
414 bool defer;
415 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
416
417 lockdep_assert_held(&priv->mutex);
418
419 if (priv->tx_power_user_lmt == tx_power && !force)
420 return 0;
421
422 if (tx_power < IWLAGN_TX_POWER_TARGET_POWER_MIN) {
423 IWL_WARN(priv,
424 "Requested user TXPOWER %d below lower limit %d.\n",
425 tx_power,
426 IWLAGN_TX_POWER_TARGET_POWER_MIN);
427 return -EINVAL;
428 }
429
430 if (tx_power > priv->tx_power_device_lmt) {
431 IWL_WARN(priv,
432 "Requested user TXPOWER %d above upper limit %d.\n",
433 tx_power, priv->tx_power_device_lmt);
434 return -EINVAL;
435 }
436
437 if (!iwl_is_ready_rf(priv))
438 return -EIO;
439
440 /* scan complete and commit_rxon use tx_power_next value,
441 * it always need to be updated for newest request */
442 priv->tx_power_next = tx_power;
443
444 /* do not set tx power when scanning or channel changing */
445 defer = test_bit(STATUS_SCANNING, &priv->status) ||
446 memcmp(&ctx->active, &ctx->staging, sizeof(ctx->staging));
447 if (defer && !force) {
448 IWL_DEBUG_INFO(priv, "Deferring tx power set\n");
449 return 0;
450 }
451
452 prev_tx_power = priv->tx_power_user_lmt;
453 priv->tx_power_user_lmt = tx_power;
454
455 ret = iwlagn_send_tx_power(priv);
456
457 /* if fail to set tx_power, restore the orig. tx power */
458 if (ret) {
459 priv->tx_power_user_lmt = prev_tx_power;
460 priv->tx_power_next = prev_tx_power;
461 }
462 return ret;
463 }
464
465 static int iwlagn_rxon_connect(struct iwl_priv *priv,
466 struct iwl_rxon_context *ctx)
467 {
468 int ret;
469 struct iwl_rxon_cmd *active = (void *)&ctx->active;
470
471 /* RXON timing must be before associated RXON */
472 if (ctx->ctxid == IWL_RXON_CTX_BSS) {
473 ret = iwl_send_rxon_timing(priv, ctx);
474 if (ret) {
475 IWL_ERR(priv, "Failed to send timing (%d)!\n", ret);
476 return ret;
477 }
478 }
479 /* QoS info may be cleared by previous un-assoc RXON */
480 iwlagn_update_qos(priv, ctx);
481
482 /*
483 * We'll run into this code path when beaconing is
484 * enabled, but then we also need to send the beacon
485 * to the device.
486 */
487 if (ctx->vif && (ctx->vif->type == NL80211_IFTYPE_AP)) {
488 ret = iwlagn_update_beacon(priv, ctx->vif);
489 if (ret) {
490 IWL_ERR(priv,
491 "Error sending required beacon (%d)!\n",
492 ret);
493 return ret;
494 }
495 }
496
497 priv->start_calib = 0;
498 /*
499 * Apply the new configuration.
500 *
501 * Associated RXON doesn't clear the station table in uCode,
502 * so we don't need to restore stations etc. after this.
503 */
504 ret = iwl_dvm_send_cmd_pdu(priv, ctx->rxon_cmd, CMD_SYNC,
505 sizeof(struct iwl_rxon_cmd), &ctx->staging);
506 if (ret) {
507 IWL_ERR(priv, "Error setting new RXON (%d)\n", ret);
508 return ret;
509 }
510 memcpy(active, &ctx->staging, sizeof(*active));
511
512 /* IBSS beacon needs to be sent after setting assoc */
513 if (ctx->vif && (ctx->vif->type == NL80211_IFTYPE_ADHOC))
514 if (iwlagn_update_beacon(priv, ctx->vif))
515 IWL_ERR(priv, "Error sending IBSS beacon\n");
516 iwl_init_sensitivity(priv);
517
518 /*
519 * If we issue a new RXON command which required a tune then
520 * we must send a new TXPOWER command or we won't be able to
521 * Tx any frames.
522 *
523 * It's expected we set power here if channel is changing.
524 */
525 ret = iwl_set_tx_power(priv, priv->tx_power_next, true);
526 if (ret) {
527 IWL_ERR(priv, "Error sending TX power (%d)\n", ret);
528 return ret;
529 }
530
531 if (ctx->vif && ctx->vif->type == NL80211_IFTYPE_STATION &&
532 cfg(priv)->ht_params && cfg(priv)->ht_params->smps_mode)
533 ieee80211_request_smps(ctx->vif,
534 cfg(priv)->ht_params->smps_mode);
535
536 return 0;
537 }
538
539 int iwlagn_set_pan_params(struct iwl_priv *priv)
540 {
541 struct iwl_wipan_params_cmd cmd;
542 struct iwl_rxon_context *ctx_bss, *ctx_pan;
543 int slot0 = 300, slot1 = 0;
544 int ret;
545
546 if (priv->valid_contexts == BIT(IWL_RXON_CTX_BSS))
547 return 0;
548
549 BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
550
551 lockdep_assert_held(&priv->mutex);
552
553 ctx_bss = &priv->contexts[IWL_RXON_CTX_BSS];
554 ctx_pan = &priv->contexts[IWL_RXON_CTX_PAN];
555
556 /*
557 * If the PAN context is inactive, then we don't need
558 * to update the PAN parameters, the last thing we'll
559 * have done before it goes inactive is making the PAN
560 * parameters be WLAN-only.
561 */
562 if (!ctx_pan->is_active)
563 return 0;
564
565 memset(&cmd, 0, sizeof(cmd));
566
567 /* only 2 slots are currently allowed */
568 cmd.num_slots = 2;
569
570 cmd.slots[0].type = 0; /* BSS */
571 cmd.slots[1].type = 1; /* PAN */
572
573 if (priv->hw_roc_setup) {
574 /* both contexts must be used for this to happen */
575 slot1 = IWL_MIN_SLOT_TIME;
576 slot0 = 3000;
577 } else if (ctx_bss->vif && ctx_pan->vif) {
578 int bcnint = ctx_pan->beacon_int;
579 int dtim = ctx_pan->vif->bss_conf.dtim_period ?: 1;
580
581 /* should be set, but seems unused?? */
582 cmd.flags |= cpu_to_le16(IWL_WIPAN_PARAMS_FLG_SLOTTED_MODE);
583
584 if (ctx_pan->vif->type == NL80211_IFTYPE_AP &&
585 bcnint &&
586 bcnint != ctx_bss->beacon_int) {
587 IWL_ERR(priv,
588 "beacon intervals don't match (%d, %d)\n",
589 ctx_bss->beacon_int, ctx_pan->beacon_int);
590 } else
591 bcnint = max_t(int, bcnint,
592 ctx_bss->beacon_int);
593 if (!bcnint)
594 bcnint = DEFAULT_BEACON_INTERVAL;
595 slot0 = bcnint / 2;
596 slot1 = bcnint - slot0;
597
598 if (test_bit(STATUS_SCAN_HW, &priv->status) ||
599 (!ctx_bss->vif->bss_conf.idle &&
600 !ctx_bss->vif->bss_conf.assoc)) {
601 slot0 = dtim * bcnint * 3 - IWL_MIN_SLOT_TIME;
602 slot1 = IWL_MIN_SLOT_TIME;
603 } else if (!ctx_pan->vif->bss_conf.idle &&
604 !ctx_pan->vif->bss_conf.assoc) {
605 slot1 = dtim * bcnint * 3 - IWL_MIN_SLOT_TIME;
606 slot0 = IWL_MIN_SLOT_TIME;
607 }
608 } else if (ctx_pan->vif) {
609 slot0 = 0;
610 slot1 = max_t(int, 1, ctx_pan->vif->bss_conf.dtim_period) *
611 ctx_pan->beacon_int;
612 slot1 = max_t(int, DEFAULT_BEACON_INTERVAL, slot1);
613
614 if (test_bit(STATUS_SCAN_HW, &priv->status)) {
615 slot0 = slot1 * 3 - IWL_MIN_SLOT_TIME;
616 slot1 = IWL_MIN_SLOT_TIME;
617 }
618 }
619
620 cmd.slots[0].width = cpu_to_le16(slot0);
621 cmd.slots[1].width = cpu_to_le16(slot1);
622
623 ret = iwl_dvm_send_cmd_pdu(priv, REPLY_WIPAN_PARAMS, CMD_SYNC,
624 sizeof(cmd), &cmd);
625 if (ret)
626 IWL_ERR(priv, "Error setting PAN parameters (%d)\n", ret);
627
628 return ret;
629 }
630
631 static void _iwl_set_rxon_ht(struct iwl_priv *priv,
632 struct iwl_ht_config *ht_conf,
633 struct iwl_rxon_context *ctx)
634 {
635 struct iwl_rxon_cmd *rxon = &ctx->staging;
636
637 if (!ctx->ht.enabled) {
638 rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |
639 RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK |
640 RXON_FLG_HT40_PROT_MSK |
641 RXON_FLG_HT_PROT_MSK);
642 return;
643 }
644
645 /* FIXME: if the definition of ht.protection changed, the "translation"
646 * will be needed for rxon->flags
647 */
648 rxon->flags |= cpu_to_le32(ctx->ht.protection <<
649 RXON_FLG_HT_OPERATING_MODE_POS);
650
651 /* Set up channel bandwidth:
652 * 20 MHz only, 20/40 mixed or pure 40 if ht40 ok */
653 /* clear the HT channel mode before set the mode */
654 rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |
655 RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
656 if (iwl_is_ht40_tx_allowed(priv, ctx, NULL)) {
657 /* pure ht40 */
658 if (ctx->ht.protection ==
659 IEEE80211_HT_OP_MODE_PROTECTION_20MHZ) {
660 rxon->flags |= RXON_FLG_CHANNEL_MODE_PURE_40;
661 /*
662 * Note: control channel is opposite of extension
663 * channel
664 */
665 switch (ctx->ht.extension_chan_offset) {
666 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
667 rxon->flags &=
668 ~RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
669 break;
670 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
671 rxon->flags |=
672 RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
673 break;
674 }
675 } else {
676 /*
677 * Note: control channel is opposite of extension
678 * channel
679 */
680 switch (ctx->ht.extension_chan_offset) {
681 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
682 rxon->flags &=
683 ~(RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
684 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
685 break;
686 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
687 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
688 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
689 break;
690 case IEEE80211_HT_PARAM_CHA_SEC_NONE:
691 default:
692 /*
693 * channel location only valid if in Mixed
694 * mode
695 */
696 IWL_ERR(priv,
697 "invalid extension channel offset\n");
698 break;
699 }
700 }
701 } else {
702 rxon->flags |= RXON_FLG_CHANNEL_MODE_LEGACY;
703 }
704
705 iwlagn_set_rxon_chain(priv, ctx);
706
707 IWL_DEBUG_ASSOC(priv, "rxon flags 0x%X operation mode :0x%X "
708 "extension channel offset 0x%x\n",
709 le32_to_cpu(rxon->flags), ctx->ht.protection,
710 ctx->ht.extension_chan_offset);
711 }
712
713 void iwl_set_rxon_ht(struct iwl_priv *priv, struct iwl_ht_config *ht_conf)
714 {
715 struct iwl_rxon_context *ctx;
716
717 for_each_context(priv, ctx)
718 _iwl_set_rxon_ht(priv, ht_conf, ctx);
719 }
720
721 /**
722 * iwl_set_rxon_channel - Set the band and channel values in staging RXON
723 * @ch: requested channel as a pointer to struct ieee80211_channel
724
725 * NOTE: Does not commit to the hardware; it sets appropriate bit fields
726 * in the staging RXON flag structure based on the ch->band
727 */
728 void iwl_set_rxon_channel(struct iwl_priv *priv, struct ieee80211_channel *ch,
729 struct iwl_rxon_context *ctx)
730 {
731 enum ieee80211_band band = ch->band;
732 u16 channel = ch->hw_value;
733
734 if ((le16_to_cpu(ctx->staging.channel) == channel) &&
735 (priv->band == band))
736 return;
737
738 ctx->staging.channel = cpu_to_le16(channel);
739 if (band == IEEE80211_BAND_5GHZ)
740 ctx->staging.flags &= ~RXON_FLG_BAND_24G_MSK;
741 else
742 ctx->staging.flags |= RXON_FLG_BAND_24G_MSK;
743
744 priv->band = band;
745
746 IWL_DEBUG_INFO(priv, "Staging channel set to %d [%d]\n", channel, band);
747
748 }
749
750 void iwl_set_flags_for_band(struct iwl_priv *priv,
751 struct iwl_rxon_context *ctx,
752 enum ieee80211_band band,
753 struct ieee80211_vif *vif)
754 {
755 if (band == IEEE80211_BAND_5GHZ) {
756 ctx->staging.flags &=
757 ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK
758 | RXON_FLG_CCK_MSK);
759 ctx->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
760 } else {
761 /* Copied from iwl_post_associate() */
762 if (vif && vif->bss_conf.use_short_slot)
763 ctx->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
764 else
765 ctx->staging.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
766
767 ctx->staging.flags |= RXON_FLG_BAND_24G_MSK;
768 ctx->staging.flags |= RXON_FLG_AUTO_DETECT_MSK;
769 ctx->staging.flags &= ~RXON_FLG_CCK_MSK;
770 }
771 }
772
773 void iwl_set_rate(struct iwl_priv *priv)
774 {
775 struct iwl_rxon_context *ctx;
776
777 for_each_context(priv, ctx) {
778 ctx->staging.cck_basic_rates =
779 (IWL_CCK_BASIC_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
780
781 ctx->staging.ofdm_basic_rates =
782 (IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
783 }
784 }
785
786 static void iwl_set_rxon_hwcrypto(struct iwl_priv *priv,
787 struct iwl_rxon_context *ctx, int hw_decrypt)
788 {
789 struct iwl_rxon_cmd *rxon = &ctx->staging;
790
791 if (hw_decrypt)
792 rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
793 else
794 rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;
795
796 }
797
798 /* validate RXON structure is valid */
799 static int iwl_check_rxon_cmd(struct iwl_priv *priv,
800 struct iwl_rxon_context *ctx)
801 {
802 struct iwl_rxon_cmd *rxon = &ctx->staging;
803 u32 errors = 0;
804
805 if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
806 if (rxon->flags & RXON_FLG_TGJ_NARROW_BAND_MSK) {
807 IWL_WARN(priv, "check 2.4G: wrong narrow\n");
808 errors |= BIT(0);
809 }
810 if (rxon->flags & RXON_FLG_RADAR_DETECT_MSK) {
811 IWL_WARN(priv, "check 2.4G: wrong radar\n");
812 errors |= BIT(1);
813 }
814 } else {
815 if (!(rxon->flags & RXON_FLG_SHORT_SLOT_MSK)) {
816 IWL_WARN(priv, "check 5.2G: not short slot!\n");
817 errors |= BIT(2);
818 }
819 if (rxon->flags & RXON_FLG_CCK_MSK) {
820 IWL_WARN(priv, "check 5.2G: CCK!\n");
821 errors |= BIT(3);
822 }
823 }
824 if ((rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1) {
825 IWL_WARN(priv, "mac/bssid mcast!\n");
826 errors |= BIT(4);
827 }
828
829 /* make sure basic rates 6Mbps and 1Mbps are supported */
830 if ((rxon->ofdm_basic_rates & IWL_RATE_6M_MASK) == 0 &&
831 (rxon->cck_basic_rates & IWL_RATE_1M_MASK) == 0) {
832 IWL_WARN(priv, "neither 1 nor 6 are basic\n");
833 errors |= BIT(5);
834 }
835
836 if (le16_to_cpu(rxon->assoc_id) > 2007) {
837 IWL_WARN(priv, "aid > 2007\n");
838 errors |= BIT(6);
839 }
840
841 if ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK))
842 == (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK)) {
843 IWL_WARN(priv, "CCK and short slot\n");
844 errors |= BIT(7);
845 }
846
847 if ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK))
848 == (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK)) {
849 IWL_WARN(priv, "CCK and auto detect");
850 errors |= BIT(8);
851 }
852
853 if ((rxon->flags & (RXON_FLG_AUTO_DETECT_MSK |
854 RXON_FLG_TGG_PROTECT_MSK)) ==
855 RXON_FLG_TGG_PROTECT_MSK) {
856 IWL_WARN(priv, "TGg but no auto-detect\n");
857 errors |= BIT(9);
858 }
859
860 if (rxon->channel == 0) {
861 IWL_WARN(priv, "zero channel is invalid\n");
862 errors |= BIT(10);
863 }
864
865 WARN(errors, "Invalid RXON (%#x), channel %d",
866 errors, le16_to_cpu(rxon->channel));
867
868 return errors ? -EINVAL : 0;
869 }
870
871 /**
872 * iwl_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed
873 * @priv: staging_rxon is compared to active_rxon
874 *
875 * If the RXON structure is changing enough to require a new tune,
876 * or is clearing the RXON_FILTER_ASSOC_MSK, then return 1 to indicate that
877 * a new tune (full RXON command, rather than RXON_ASSOC cmd) is required.
878 */
879 static int iwl_full_rxon_required(struct iwl_priv *priv,
880 struct iwl_rxon_context *ctx)
881 {
882 const struct iwl_rxon_cmd *staging = &ctx->staging;
883 const struct iwl_rxon_cmd *active = &ctx->active;
884
885 #define CHK(cond) \
886 if ((cond)) { \
887 IWL_DEBUG_INFO(priv, "need full RXON - " #cond "\n"); \
888 return 1; \
889 }
890
891 #define CHK_NEQ(c1, c2) \
892 if ((c1) != (c2)) { \
893 IWL_DEBUG_INFO(priv, "need full RXON - " \
894 #c1 " != " #c2 " - %d != %d\n", \
895 (c1), (c2)); \
896 return 1; \
897 }
898
899 /* These items are only settable from the full RXON command */
900 CHK(!iwl_is_associated_ctx(ctx));
901 CHK(compare_ether_addr(staging->bssid_addr, active->bssid_addr));
902 CHK(compare_ether_addr(staging->node_addr, active->node_addr));
903 CHK(compare_ether_addr(staging->wlap_bssid_addr,
904 active->wlap_bssid_addr));
905 CHK_NEQ(staging->dev_type, active->dev_type);
906 CHK_NEQ(staging->channel, active->channel);
907 CHK_NEQ(staging->air_propagation, active->air_propagation);
908 CHK_NEQ(staging->ofdm_ht_single_stream_basic_rates,
909 active->ofdm_ht_single_stream_basic_rates);
910 CHK_NEQ(staging->ofdm_ht_dual_stream_basic_rates,
911 active->ofdm_ht_dual_stream_basic_rates);
912 CHK_NEQ(staging->ofdm_ht_triple_stream_basic_rates,
913 active->ofdm_ht_triple_stream_basic_rates);
914 CHK_NEQ(staging->assoc_id, active->assoc_id);
915
916 /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
917 * be updated with the RXON_ASSOC command -- however only some
918 * flag transitions are allowed using RXON_ASSOC */
919
920 /* Check if we are not switching bands */
921 CHK_NEQ(staging->flags & RXON_FLG_BAND_24G_MSK,
922 active->flags & RXON_FLG_BAND_24G_MSK);
923
924 /* Check if we are switching association toggle */
925 CHK_NEQ(staging->filter_flags & RXON_FILTER_ASSOC_MSK,
926 active->filter_flags & RXON_FILTER_ASSOC_MSK);
927
928 #undef CHK
929 #undef CHK_NEQ
930
931 return 0;
932 }
933
934 #ifdef CONFIG_IWLWIFI_DEBUG
935 void iwl_print_rx_config_cmd(struct iwl_priv *priv,
936 enum iwl_rxon_context_id ctxid)
937 {
938 struct iwl_rxon_context *ctx = &priv->contexts[ctxid];
939 struct iwl_rxon_cmd *rxon = &ctx->staging;
940
941 IWL_DEBUG_RADIO(priv, "RX CONFIG:\n");
942 iwl_print_hex_dump(priv, IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
943 IWL_DEBUG_RADIO(priv, "u16 channel: 0x%x\n",
944 le16_to_cpu(rxon->channel));
945 IWL_DEBUG_RADIO(priv, "u32 flags: 0x%08X\n",
946 le32_to_cpu(rxon->flags));
947 IWL_DEBUG_RADIO(priv, "u32 filter_flags: 0x%08x\n",
948 le32_to_cpu(rxon->filter_flags));
949 IWL_DEBUG_RADIO(priv, "u8 dev_type: 0x%x\n", rxon->dev_type);
950 IWL_DEBUG_RADIO(priv, "u8 ofdm_basic_rates: 0x%02x\n",
951 rxon->ofdm_basic_rates);
952 IWL_DEBUG_RADIO(priv, "u8 cck_basic_rates: 0x%02x\n",
953 rxon->cck_basic_rates);
954 IWL_DEBUG_RADIO(priv, "u8[6] node_addr: %pM\n", rxon->node_addr);
955 IWL_DEBUG_RADIO(priv, "u8[6] bssid_addr: %pM\n", rxon->bssid_addr);
956 IWL_DEBUG_RADIO(priv, "u16 assoc_id: 0x%x\n",
957 le16_to_cpu(rxon->assoc_id));
958 }
959 #endif
960
961 /**
962 * iwlagn_commit_rxon - commit staging_rxon to hardware
963 *
964 * The RXON command in staging_rxon is committed to the hardware and
965 * the active_rxon structure is updated with the new data. This
966 * function correctly transitions out of the RXON_ASSOC_MSK state if
967 * a HW tune is required based on the RXON structure changes.
968 *
969 * The connect/disconnect flow should be as the following:
970 *
971 * 1. make sure send RXON command with association bit unset if not connect
972 * this should include the channel and the band for the candidate
973 * to be connected to
974 * 2. Add Station before RXON association with the AP
975 * 3. RXON_timing has to send before RXON for connection
976 * 4. full RXON command - associated bit set
977 * 5. use RXON_ASSOC command to update any flags changes
978 */
979 int iwlagn_commit_rxon(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
980 {
981 /* cast away the const for active_rxon in this function */
982 struct iwl_rxon_cmd *active = (void *)&ctx->active;
983 bool new_assoc = !!(ctx->staging.filter_flags & RXON_FILTER_ASSOC_MSK);
984 int ret;
985
986 lockdep_assert_held(&priv->mutex);
987
988 if (!iwl_is_alive(priv))
989 return -EBUSY;
990
991 /* This function hardcodes a bunch of dual-mode assumptions */
992 BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
993
994 if (!ctx->is_active)
995 return 0;
996
997 /* always get timestamp with Rx frame */
998 ctx->staging.flags |= RXON_FLG_TSF2HOST_MSK;
999
1000 /*
1001 * force CTS-to-self frames protection if RTS-CTS is not preferred
1002 * one aggregation protection method
1003 */
1004 if (!priv->hw_params.use_rts_for_aggregation)
1005 ctx->staging.flags |= RXON_FLG_SELF_CTS_EN;
1006
1007 if ((ctx->vif && ctx->vif->bss_conf.use_short_slot) ||
1008 !(ctx->staging.flags & RXON_FLG_BAND_24G_MSK))
1009 ctx->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
1010 else
1011 ctx->staging.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
1012
1013 iwl_print_rx_config_cmd(priv, ctx->ctxid);
1014 ret = iwl_check_rxon_cmd(priv, ctx);
1015 if (ret) {
1016 IWL_ERR(priv, "Invalid RXON configuration. Not committing.\n");
1017 return -EINVAL;
1018 }
1019
1020 /*
1021 * receive commit_rxon request
1022 * abort any previous channel switch if still in process
1023 */
1024 if (test_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status) &&
1025 (priv->switch_channel != ctx->staging.channel)) {
1026 IWL_DEBUG_11H(priv, "abort channel switch on %d\n",
1027 le16_to_cpu(priv->switch_channel));
1028 iwl_chswitch_done(priv, false);
1029 }
1030
1031 /*
1032 * If we don't need to send a full RXON, we can use
1033 * iwl_rxon_assoc_cmd which is used to reconfigure filter
1034 * and other flags for the current radio configuration.
1035 */
1036 if (!iwl_full_rxon_required(priv, ctx)) {
1037 ret = iwlagn_send_rxon_assoc(priv, ctx);
1038 if (ret) {
1039 IWL_ERR(priv, "Error setting RXON_ASSOC (%d)\n", ret);
1040 return ret;
1041 }
1042
1043 memcpy(active, &ctx->staging, sizeof(*active));
1044 /*
1045 * We do not commit tx power settings while channel changing,
1046 * do it now if after settings changed.
1047 */
1048 iwl_set_tx_power(priv, priv->tx_power_next, false);
1049
1050 /* make sure we are in the right PS state */
1051 iwl_power_update_mode(priv, true);
1052
1053 return 0;
1054 }
1055
1056 iwl_set_rxon_hwcrypto(priv, ctx, !iwlagn_mod_params.sw_crypto);
1057
1058 IWL_DEBUG_INFO(priv,
1059 "Going to commit RXON\n"
1060 " * with%s RXON_FILTER_ASSOC_MSK\n"
1061 " * channel = %d\n"
1062 " * bssid = %pM\n",
1063 (new_assoc ? "" : "out"),
1064 le16_to_cpu(ctx->staging.channel),
1065 ctx->staging.bssid_addr);
1066
1067 /*
1068 * Always clear associated first, but with the correct config.
1069 * This is required as for example station addition for the
1070 * AP station must be done after the BSSID is set to correctly
1071 * set up filters in the device.
1072 */
1073 ret = iwlagn_rxon_disconn(priv, ctx);
1074 if (ret)
1075 return ret;
1076
1077 ret = iwlagn_set_pan_params(priv);
1078 if (ret)
1079 return ret;
1080
1081 if (new_assoc)
1082 return iwlagn_rxon_connect(priv, ctx);
1083
1084 return 0;
1085 }
1086
1087 void iwlagn_config_ht40(struct ieee80211_conf *conf,
1088 struct iwl_rxon_context *ctx)
1089 {
1090 if (conf_is_ht40_minus(conf)) {
1091 ctx->ht.extension_chan_offset =
1092 IEEE80211_HT_PARAM_CHA_SEC_BELOW;
1093 ctx->ht.is_40mhz = true;
1094 } else if (conf_is_ht40_plus(conf)) {
1095 ctx->ht.extension_chan_offset =
1096 IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
1097 ctx->ht.is_40mhz = true;
1098 } else {
1099 ctx->ht.extension_chan_offset =
1100 IEEE80211_HT_PARAM_CHA_SEC_NONE;
1101 ctx->ht.is_40mhz = false;
1102 }
1103 }
1104
1105 int iwlagn_mac_config(struct ieee80211_hw *hw, u32 changed)
1106 {
1107 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1108 struct iwl_rxon_context *ctx;
1109 struct ieee80211_conf *conf = &hw->conf;
1110 struct ieee80211_channel *channel = conf->channel;
1111 const struct iwl_channel_info *ch_info;
1112 int ret = 0;
1113
1114 IWL_DEBUG_MAC80211(priv, "enter: changed %#x\n", changed);
1115
1116 mutex_lock(&priv->mutex);
1117
1118 if (unlikely(test_bit(STATUS_SCANNING, &priv->status))) {
1119 IWL_DEBUG_MAC80211(priv, "leave - scanning\n");
1120 goto out;
1121 }
1122
1123 if (!iwl_is_ready(priv)) {
1124 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
1125 goto out;
1126 }
1127
1128 if (changed & (IEEE80211_CONF_CHANGE_SMPS |
1129 IEEE80211_CONF_CHANGE_CHANNEL)) {
1130 /* mac80211 uses static for non-HT which is what we want */
1131 priv->current_ht_config.smps = conf->smps_mode;
1132
1133 /*
1134 * Recalculate chain counts.
1135 *
1136 * If monitor mode is enabled then mac80211 will
1137 * set up the SM PS mode to OFF if an HT channel is
1138 * configured.
1139 */
1140 for_each_context(priv, ctx)
1141 iwlagn_set_rxon_chain(priv, ctx);
1142 }
1143
1144 if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
1145 ch_info = iwl_get_channel_info(priv, channel->band,
1146 channel->hw_value);
1147 if (!is_channel_valid(ch_info)) {
1148 IWL_DEBUG_MAC80211(priv, "leave - invalid channel\n");
1149 ret = -EINVAL;
1150 goto out;
1151 }
1152
1153 for_each_context(priv, ctx) {
1154 /* Configure HT40 channels */
1155 if (ctx->ht.enabled != conf_is_ht(conf))
1156 ctx->ht.enabled = conf_is_ht(conf);
1157
1158 if (ctx->ht.enabled) {
1159 /* if HT40 is used, it should not change
1160 * after associated except channel switch */
1161 if (!ctx->ht.is_40mhz ||
1162 !iwl_is_associated_ctx(ctx))
1163 iwlagn_config_ht40(conf, ctx);
1164 } else
1165 ctx->ht.is_40mhz = false;
1166
1167 /*
1168 * Default to no protection. Protection mode will
1169 * later be set from BSS config in iwl_ht_conf
1170 */
1171 ctx->ht.protection = IEEE80211_HT_OP_MODE_PROTECTION_NONE;
1172
1173 /* if we are switching from ht to 2.4 clear flags
1174 * from any ht related info since 2.4 does not
1175 * support ht */
1176 if (le16_to_cpu(ctx->staging.channel) !=
1177 channel->hw_value)
1178 ctx->staging.flags = 0;
1179
1180 iwl_set_rxon_channel(priv, channel, ctx);
1181 iwl_set_rxon_ht(priv, &priv->current_ht_config);
1182
1183 iwl_set_flags_for_band(priv, ctx, channel->band,
1184 ctx->vif);
1185 }
1186
1187 iwl_update_bcast_stations(priv);
1188
1189 /*
1190 * The list of supported rates and rate mask can be different
1191 * for each band; since the band may have changed, reset
1192 * the rate mask to what mac80211 lists.
1193 */
1194 iwl_set_rate(priv);
1195 }
1196
1197 if (changed & (IEEE80211_CONF_CHANGE_PS |
1198 IEEE80211_CONF_CHANGE_IDLE)) {
1199 ret = iwl_power_update_mode(priv, false);
1200 if (ret)
1201 IWL_DEBUG_MAC80211(priv, "Error setting sleep level\n");
1202 }
1203
1204 if (changed & IEEE80211_CONF_CHANGE_POWER) {
1205 IWL_DEBUG_MAC80211(priv, "TX Power old=%d new=%d\n",
1206 priv->tx_power_user_lmt, conf->power_level);
1207
1208 iwl_set_tx_power(priv, conf->power_level, false);
1209 }
1210
1211 for_each_context(priv, ctx) {
1212 if (!memcmp(&ctx->staging, &ctx->active, sizeof(ctx->staging)))
1213 continue;
1214 iwlagn_commit_rxon(priv, ctx);
1215 }
1216 out:
1217 mutex_unlock(&priv->mutex);
1218 IWL_DEBUG_MAC80211(priv, "leave\n");
1219
1220 return ret;
1221 }
1222
1223 static void iwlagn_check_needed_chains(struct iwl_priv *priv,
1224 struct iwl_rxon_context *ctx,
1225 struct ieee80211_bss_conf *bss_conf)
1226 {
1227 struct ieee80211_vif *vif = ctx->vif;
1228 struct iwl_rxon_context *tmp;
1229 struct ieee80211_sta *sta;
1230 struct iwl_ht_config *ht_conf = &priv->current_ht_config;
1231 struct ieee80211_sta_ht_cap *ht_cap;
1232 bool need_multiple;
1233
1234 lockdep_assert_held(&priv->mutex);
1235
1236 switch (vif->type) {
1237 case NL80211_IFTYPE_STATION:
1238 rcu_read_lock();
1239 sta = ieee80211_find_sta(vif, bss_conf->bssid);
1240 if (!sta) {
1241 /*
1242 * If at all, this can only happen through a race
1243 * when the AP disconnects us while we're still
1244 * setting up the connection, in that case mac80211
1245 * will soon tell us about that.
1246 */
1247 need_multiple = false;
1248 rcu_read_unlock();
1249 break;
1250 }
1251
1252 ht_cap = &sta->ht_cap;
1253
1254 need_multiple = true;
1255
1256 /*
1257 * If the peer advertises no support for receiving 2 and 3
1258 * stream MCS rates, it can't be transmitting them either.
1259 */
1260 if (ht_cap->mcs.rx_mask[1] == 0 &&
1261 ht_cap->mcs.rx_mask[2] == 0) {
1262 need_multiple = false;
1263 } else if (!(ht_cap->mcs.tx_params &
1264 IEEE80211_HT_MCS_TX_DEFINED)) {
1265 /* If it can't TX MCS at all ... */
1266 need_multiple = false;
1267 } else if (ht_cap->mcs.tx_params &
1268 IEEE80211_HT_MCS_TX_RX_DIFF) {
1269 int maxstreams;
1270
1271 /*
1272 * But if it can receive them, it might still not
1273 * be able to transmit them, which is what we need
1274 * to check here -- so check the number of streams
1275 * it advertises for TX (if different from RX).
1276 */
1277
1278 maxstreams = (ht_cap->mcs.tx_params &
1279 IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK);
1280 maxstreams >>=
1281 IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT;
1282 maxstreams += 1;
1283
1284 if (maxstreams <= 1)
1285 need_multiple = false;
1286 }
1287
1288 rcu_read_unlock();
1289 break;
1290 case NL80211_IFTYPE_ADHOC:
1291 /* currently */
1292 need_multiple = false;
1293 break;
1294 default:
1295 /* only AP really */
1296 need_multiple = true;
1297 break;
1298 }
1299
1300 ctx->ht_need_multiple_chains = need_multiple;
1301
1302 if (!need_multiple) {
1303 /* check all contexts */
1304 for_each_context(priv, tmp) {
1305 if (!tmp->vif)
1306 continue;
1307 if (tmp->ht_need_multiple_chains) {
1308 need_multiple = true;
1309 break;
1310 }
1311 }
1312 }
1313
1314 ht_conf->single_chain_sufficient = !need_multiple;
1315 }
1316
1317 static void iwlagn_chain_noise_reset(struct iwl_priv *priv)
1318 {
1319 struct iwl_chain_noise_data *data = &priv->chain_noise_data;
1320 int ret;
1321
1322 if ((data->state == IWL_CHAIN_NOISE_ALIVE) &&
1323 iwl_is_any_associated(priv)) {
1324 struct iwl_calib_chain_noise_reset_cmd cmd;
1325
1326 /* clear data for chain noise calibration algorithm */
1327 data->chain_noise_a = 0;
1328 data->chain_noise_b = 0;
1329 data->chain_noise_c = 0;
1330 data->chain_signal_a = 0;
1331 data->chain_signal_b = 0;
1332 data->chain_signal_c = 0;
1333 data->beacon_count = 0;
1334
1335 memset(&cmd, 0, sizeof(cmd));
1336 iwl_set_calib_hdr(&cmd.hdr,
1337 priv->phy_calib_chain_noise_reset_cmd);
1338 ret = iwl_dvm_send_cmd_pdu(priv,
1339 REPLY_PHY_CALIBRATION_CMD,
1340 CMD_SYNC, sizeof(cmd), &cmd);
1341 if (ret)
1342 IWL_ERR(priv,
1343 "Could not send REPLY_PHY_CALIBRATION_CMD\n");
1344 data->state = IWL_CHAIN_NOISE_ACCUMULATE;
1345 IWL_DEBUG_CALIB(priv, "Run chain_noise_calibrate\n");
1346 }
1347 }
1348
1349 void iwlagn_bss_info_changed(struct ieee80211_hw *hw,
1350 struct ieee80211_vif *vif,
1351 struct ieee80211_bss_conf *bss_conf,
1352 u32 changes)
1353 {
1354 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1355 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1356 int ret;
1357 bool force = false;
1358
1359 mutex_lock(&priv->mutex);
1360
1361 if (unlikely(!iwl_is_ready(priv))) {
1362 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
1363 mutex_unlock(&priv->mutex);
1364 return;
1365 }
1366
1367 if (unlikely(!ctx->vif)) {
1368 IWL_DEBUG_MAC80211(priv, "leave - vif is NULL\n");
1369 mutex_unlock(&priv->mutex);
1370 return;
1371 }
1372
1373 if (changes & BSS_CHANGED_BEACON_INT)
1374 force = true;
1375
1376 if (changes & BSS_CHANGED_QOS) {
1377 ctx->qos_data.qos_active = bss_conf->qos;
1378 iwlagn_update_qos(priv, ctx);
1379 }
1380
1381 ctx->staging.assoc_id = cpu_to_le16(vif->bss_conf.aid);
1382 if (vif->bss_conf.use_short_preamble)
1383 ctx->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
1384 else
1385 ctx->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
1386
1387 if (changes & BSS_CHANGED_ASSOC) {
1388 if (bss_conf->assoc) {
1389 priv->timestamp = bss_conf->last_tsf;
1390 ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
1391 } else {
1392 /*
1393 * If we disassociate while there are pending
1394 * frames, just wake up the queues and let the
1395 * frames "escape" ... This shouldn't really
1396 * be happening to start with, but we should
1397 * not get stuck in this case either since it
1398 * can happen if userspace gets confused.
1399 */
1400 iwlagn_lift_passive_no_rx(priv);
1401
1402 ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
1403
1404 if (ctx->ctxid == IWL_RXON_CTX_BSS)
1405 priv->have_rekey_data = false;
1406 }
1407
1408 iwlagn_bt_coex_rssi_monitor(priv);
1409 }
1410
1411 if (ctx->ht.enabled) {
1412 ctx->ht.protection = bss_conf->ht_operation_mode &
1413 IEEE80211_HT_OP_MODE_PROTECTION;
1414 ctx->ht.non_gf_sta_present = !!(bss_conf->ht_operation_mode &
1415 IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT);
1416 iwlagn_check_needed_chains(priv, ctx, bss_conf);
1417 iwl_set_rxon_ht(priv, &priv->current_ht_config);
1418 }
1419
1420 iwlagn_set_rxon_chain(priv, ctx);
1421
1422 if (bss_conf->use_cts_prot && (priv->band != IEEE80211_BAND_5GHZ))
1423 ctx->staging.flags |= RXON_FLG_TGG_PROTECT_MSK;
1424 else
1425 ctx->staging.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
1426
1427 if (bss_conf->use_cts_prot)
1428 ctx->staging.flags |= RXON_FLG_SELF_CTS_EN;
1429 else
1430 ctx->staging.flags &= ~RXON_FLG_SELF_CTS_EN;
1431
1432 memcpy(ctx->staging.bssid_addr, bss_conf->bssid, ETH_ALEN);
1433
1434 if (vif->type == NL80211_IFTYPE_AP ||
1435 vif->type == NL80211_IFTYPE_ADHOC) {
1436 if (vif->bss_conf.enable_beacon) {
1437 ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
1438 priv->beacon_ctx = ctx;
1439 } else {
1440 ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
1441 priv->beacon_ctx = NULL;
1442 }
1443 }
1444
1445 /*
1446 * If the ucode decides to do beacon filtering before
1447 * association, it will lose beacons that are needed
1448 * before sending frames out on passive channels. This
1449 * causes association failures on those channels. Enable
1450 * receiving beacons in such cases.
1451 */
1452
1453 if (vif->type == NL80211_IFTYPE_STATION) {
1454 if (!bss_conf->assoc)
1455 ctx->staging.filter_flags |= RXON_FILTER_BCON_AWARE_MSK;
1456 else
1457 ctx->staging.filter_flags &=
1458 ~RXON_FILTER_BCON_AWARE_MSK;
1459 }
1460
1461 if (force || memcmp(&ctx->staging, &ctx->active, sizeof(ctx->staging)))
1462 iwlagn_commit_rxon(priv, ctx);
1463
1464 if (changes & BSS_CHANGED_ASSOC && bss_conf->assoc) {
1465 /*
1466 * The chain noise calibration will enable PM upon
1467 * completion. If calibration has already been run
1468 * then we need to enable power management here.
1469 */
1470 if (priv->chain_noise_data.state == IWL_CHAIN_NOISE_DONE)
1471 iwl_power_update_mode(priv, false);
1472
1473 /* Enable RX differential gain and sensitivity calibrations */
1474 if (!priv->disable_chain_noise_cal)
1475 iwlagn_chain_noise_reset(priv);
1476 priv->start_calib = 1;
1477 }
1478
1479 if (changes & BSS_CHANGED_IBSS) {
1480 ret = iwlagn_manage_ibss_station(priv, vif,
1481 bss_conf->ibss_joined);
1482 if (ret)
1483 IWL_ERR(priv, "failed to %s IBSS station %pM\n",
1484 bss_conf->ibss_joined ? "add" : "remove",
1485 bss_conf->bssid);
1486 }
1487
1488 if (changes & BSS_CHANGED_BEACON && vif->type == NL80211_IFTYPE_ADHOC &&
1489 priv->beacon_ctx) {
1490 if (iwlagn_update_beacon(priv, vif))
1491 IWL_ERR(priv, "Error sending IBSS beacon\n");
1492 }
1493
1494 mutex_unlock(&priv->mutex);
1495 }
1496
1497 void iwlagn_post_scan(struct iwl_priv *priv)
1498 {
1499 struct iwl_rxon_context *ctx;
1500
1501 /*
1502 * We do not commit power settings while scan is pending,
1503 * do it now if the settings changed.
1504 */
1505 iwl_power_set_mode(priv, &priv->power_data.sleep_cmd_next, false);
1506 iwl_set_tx_power(priv, priv->tx_power_next, false);
1507
1508 /*
1509 * Since setting the RXON may have been deferred while
1510 * performing the scan, fire one off if needed
1511 */
1512 for_each_context(priv, ctx)
1513 if (memcmp(&ctx->staging, &ctx->active, sizeof(ctx->staging)))
1514 iwlagn_commit_rxon(priv, ctx);
1515
1516 iwlagn_set_pan_params(priv);
1517 }
Linux kernel - Deliverables
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