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Merge remote-tracking branch 'regulator/topic/palmas' into v3.9-rc8
[mirror_ubuntu-hirsute-kernel.git] / drivers / net / wireless / iwlwifi / dvm / rxon.c
1 /******************************************************************************
2 *
3 * Copyright(c) 2003 - 2013 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-trans.h"
29 #include "iwl-modparams.h"
30 #include "dev.h"
31 #include "agn.h"
32 #include "calib.h"
33
34 /*
35 * initialize rxon structure with default values from eeprom
36 */
37 void iwl_connection_init_rx_config(struct iwl_priv *priv,
38 struct iwl_rxon_context *ctx)
39 {
40 memset(&ctx->staging, 0, sizeof(ctx->staging));
41
42 if (!ctx->vif) {
43 ctx->staging.dev_type = ctx->unused_devtype;
44 } else
45 switch (ctx->vif->type) {
46 case NL80211_IFTYPE_AP:
47 ctx->staging.dev_type = ctx->ap_devtype;
48 break;
49
50 case NL80211_IFTYPE_STATION:
51 ctx->staging.dev_type = ctx->station_devtype;
52 ctx->staging.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
53 break;
54
55 case NL80211_IFTYPE_ADHOC:
56 ctx->staging.dev_type = ctx->ibss_devtype;
57 ctx->staging.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
58 ctx->staging.filter_flags = RXON_FILTER_BCON_AWARE_MSK |
59 RXON_FILTER_ACCEPT_GRP_MSK;
60 break;
61
62 case NL80211_IFTYPE_MONITOR:
63 ctx->staging.dev_type = RXON_DEV_TYPE_SNIFFER;
64 break;
65
66 default:
67 IWL_ERR(priv, "Unsupported interface type %d\n",
68 ctx->vif->type);
69 break;
70 }
71
72 #if 0
73 /* TODO: Figure out when short_preamble would be set and cache from
74 * that */
75 if (!hw_to_local(priv->hw)->short_preamble)
76 ctx->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
77 else
78 ctx->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
79 #endif
80
81 ctx->staging.channel = cpu_to_le16(priv->hw->conf.channel->hw_value);
82 priv->band = priv->hw->conf.channel->band;
83
84 iwl_set_flags_for_band(priv, ctx, priv->band, ctx->vif);
85
86 /* clear both MIX and PURE40 mode flag */
87 ctx->staging.flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED |
88 RXON_FLG_CHANNEL_MODE_PURE_40);
89 if (ctx->vif)
90 memcpy(ctx->staging.node_addr, ctx->vif->addr, ETH_ALEN);
91
92 ctx->staging.ofdm_ht_single_stream_basic_rates = 0xff;
93 ctx->staging.ofdm_ht_dual_stream_basic_rates = 0xff;
94 ctx->staging.ofdm_ht_triple_stream_basic_rates = 0xff;
95 }
96
97 static int iwlagn_disable_bss(struct iwl_priv *priv,
98 struct iwl_rxon_context *ctx,
99 struct iwl_rxon_cmd *send)
100 {
101 __le32 old_filter = send->filter_flags;
102 int ret;
103
104 send->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
105 ret = iwl_dvm_send_cmd_pdu(priv, ctx->rxon_cmd,
106 CMD_SYNC, sizeof(*send), send);
107
108 send->filter_flags = old_filter;
109
110 if (ret)
111 IWL_DEBUG_QUIET_RFKILL(priv,
112 "Error clearing ASSOC_MSK on BSS (%d)\n", ret);
113
114 return ret;
115 }
116
117 static int iwlagn_disable_pan(struct iwl_priv *priv,
118 struct iwl_rxon_context *ctx,
119 struct iwl_rxon_cmd *send)
120 {
121 struct iwl_notification_wait disable_wait;
122 __le32 old_filter = send->filter_flags;
123 u8 old_dev_type = send->dev_type;
124 int ret;
125 static const u8 deactivate_cmd[] = {
126 REPLY_WIPAN_DEACTIVATION_COMPLETE
127 };
128
129 iwl_init_notification_wait(&priv->notif_wait, &disable_wait,
130 deactivate_cmd, ARRAY_SIZE(deactivate_cmd),
131 NULL, NULL);
132
133 send->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
134 send->dev_type = RXON_DEV_TYPE_P2P;
135 ret = iwl_dvm_send_cmd_pdu(priv, ctx->rxon_cmd,
136 CMD_SYNC, sizeof(*send), send);
137
138 send->filter_flags = old_filter;
139 send->dev_type = old_dev_type;
140
141 if (ret) {
142 IWL_ERR(priv, "Error disabling PAN (%d)\n", ret);
143 iwl_remove_notification(&priv->notif_wait, &disable_wait);
144 } else {
145 ret = iwl_wait_notification(&priv->notif_wait,
146 &disable_wait, HZ);
147 if (ret)
148 IWL_ERR(priv, "Timed out waiting for PAN disable\n");
149 }
150
151 return ret;
152 }
153
154 static int iwlagn_disconn_pan(struct iwl_priv *priv,
155 struct iwl_rxon_context *ctx,
156 struct iwl_rxon_cmd *send)
157 {
158 __le32 old_filter = send->filter_flags;
159 int ret;
160
161 send->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
162 ret = iwl_dvm_send_cmd_pdu(priv, ctx->rxon_cmd, CMD_SYNC,
163 sizeof(*send), send);
164
165 send->filter_flags = old_filter;
166
167 return ret;
168 }
169
170 static void iwlagn_update_qos(struct iwl_priv *priv,
171 struct iwl_rxon_context *ctx)
172 {
173 int ret;
174
175 if (!ctx->is_active)
176 return;
177
178 ctx->qos_data.def_qos_parm.qos_flags = 0;
179
180 if (ctx->qos_data.qos_active)
181 ctx->qos_data.def_qos_parm.qos_flags |=
182 QOS_PARAM_FLG_UPDATE_EDCA_MSK;
183
184 if (ctx->ht.enabled)
185 ctx->qos_data.def_qos_parm.qos_flags |= QOS_PARAM_FLG_TGN_MSK;
186
187 IWL_DEBUG_INFO(priv, "send QoS cmd with Qos active=%d FLAGS=0x%X\n",
188 ctx->qos_data.qos_active,
189 ctx->qos_data.def_qos_parm.qos_flags);
190
191 ret = iwl_dvm_send_cmd_pdu(priv, ctx->qos_cmd, CMD_SYNC,
192 sizeof(struct iwl_qosparam_cmd),
193 &ctx->qos_data.def_qos_parm);
194 if (ret)
195 IWL_DEBUG_QUIET_RFKILL(priv, "Failed to update QoS\n");
196 }
197
198 static int iwlagn_update_beacon(struct iwl_priv *priv,
199 struct ieee80211_vif *vif)
200 {
201 lockdep_assert_held(&priv->mutex);
202
203 dev_kfree_skb(priv->beacon_skb);
204 priv->beacon_skb = ieee80211_beacon_get(priv->hw, vif);
205 if (!priv->beacon_skb)
206 return -ENOMEM;
207 return iwlagn_send_beacon_cmd(priv);
208 }
209
210 static int iwlagn_send_rxon_assoc(struct iwl_priv *priv,
211 struct iwl_rxon_context *ctx)
212 {
213 int ret = 0;
214 struct iwl_rxon_assoc_cmd rxon_assoc;
215 const struct iwl_rxon_cmd *rxon1 = &ctx->staging;
216 const struct iwl_rxon_cmd *rxon2 = &ctx->active;
217
218 if ((rxon1->flags == rxon2->flags) &&
219 (rxon1->filter_flags == rxon2->filter_flags) &&
220 (rxon1->cck_basic_rates == rxon2->cck_basic_rates) &&
221 (rxon1->ofdm_ht_single_stream_basic_rates ==
222 rxon2->ofdm_ht_single_stream_basic_rates) &&
223 (rxon1->ofdm_ht_dual_stream_basic_rates ==
224 rxon2->ofdm_ht_dual_stream_basic_rates) &&
225 (rxon1->ofdm_ht_triple_stream_basic_rates ==
226 rxon2->ofdm_ht_triple_stream_basic_rates) &&
227 (rxon1->acquisition_data == rxon2->acquisition_data) &&
228 (rxon1->rx_chain == rxon2->rx_chain) &&
229 (rxon1->ofdm_basic_rates == rxon2->ofdm_basic_rates)) {
230 IWL_DEBUG_INFO(priv, "Using current RXON_ASSOC. Not resending.\n");
231 return 0;
232 }
233
234 rxon_assoc.flags = ctx->staging.flags;
235 rxon_assoc.filter_flags = ctx->staging.filter_flags;
236 rxon_assoc.ofdm_basic_rates = ctx->staging.ofdm_basic_rates;
237 rxon_assoc.cck_basic_rates = ctx->staging.cck_basic_rates;
238 rxon_assoc.reserved1 = 0;
239 rxon_assoc.reserved2 = 0;
240 rxon_assoc.reserved3 = 0;
241 rxon_assoc.ofdm_ht_single_stream_basic_rates =
242 ctx->staging.ofdm_ht_single_stream_basic_rates;
243 rxon_assoc.ofdm_ht_dual_stream_basic_rates =
244 ctx->staging.ofdm_ht_dual_stream_basic_rates;
245 rxon_assoc.rx_chain_select_flags = ctx->staging.rx_chain;
246 rxon_assoc.ofdm_ht_triple_stream_basic_rates =
247 ctx->staging.ofdm_ht_triple_stream_basic_rates;
248 rxon_assoc.acquisition_data = ctx->staging.acquisition_data;
249
250 ret = iwl_dvm_send_cmd_pdu(priv, ctx->rxon_assoc_cmd,
251 CMD_ASYNC, sizeof(rxon_assoc), &rxon_assoc);
252 return ret;
253 }
254
255 static u16 iwl_adjust_beacon_interval(u16 beacon_val, u16 max_beacon_val)
256 {
257 u16 new_val;
258 u16 beacon_factor;
259
260 /*
261 * If mac80211 hasn't given us a beacon interval, program
262 * the default into the device (not checking this here
263 * would cause the adjustment below to return the maximum
264 * value, which may break PAN.)
265 */
266 if (!beacon_val)
267 return DEFAULT_BEACON_INTERVAL;
268
269 /*
270 * If the beacon interval we obtained from the peer
271 * is too large, we'll have to wake up more often
272 * (and in IBSS case, we'll beacon too much)
273 *
274 * For example, if max_beacon_val is 4096, and the
275 * requested beacon interval is 7000, we'll have to
276 * use 3500 to be able to wake up on the beacons.
277 *
278 * This could badly influence beacon detection stats.
279 */
280
281 beacon_factor = (beacon_val + max_beacon_val) / max_beacon_val;
282 new_val = beacon_val / beacon_factor;
283
284 if (!new_val)
285 new_val = max_beacon_val;
286
287 return new_val;
288 }
289
290 static int iwl_send_rxon_timing(struct iwl_priv *priv,
291 struct iwl_rxon_context *ctx)
292 {
293 u64 tsf;
294 s32 interval_tm, rem;
295 struct ieee80211_conf *conf = NULL;
296 u16 beacon_int;
297 struct ieee80211_vif *vif = ctx->vif;
298
299 conf = &priv->hw->conf;
300
301 lockdep_assert_held(&priv->mutex);
302
303 memset(&ctx->timing, 0, sizeof(struct iwl_rxon_time_cmd));
304
305 ctx->timing.timestamp = cpu_to_le64(priv->timestamp);
306 ctx->timing.listen_interval = cpu_to_le16(conf->listen_interval);
307
308 beacon_int = vif ? vif->bss_conf.beacon_int : 0;
309
310 /*
311 * TODO: For IBSS we need to get atim_window from mac80211,
312 * for now just always use 0
313 */
314 ctx->timing.atim_window = 0;
315
316 if (ctx->ctxid == IWL_RXON_CTX_PAN &&
317 (!ctx->vif || ctx->vif->type != NL80211_IFTYPE_STATION) &&
318 iwl_is_associated(priv, IWL_RXON_CTX_BSS) &&
319 priv->contexts[IWL_RXON_CTX_BSS].vif &&
320 priv->contexts[IWL_RXON_CTX_BSS].vif->bss_conf.beacon_int) {
321 ctx->timing.beacon_interval =
322 priv->contexts[IWL_RXON_CTX_BSS].timing.beacon_interval;
323 beacon_int = le16_to_cpu(ctx->timing.beacon_interval);
324 } else if (ctx->ctxid == IWL_RXON_CTX_BSS &&
325 iwl_is_associated(priv, IWL_RXON_CTX_PAN) &&
326 priv->contexts[IWL_RXON_CTX_PAN].vif &&
327 priv->contexts[IWL_RXON_CTX_PAN].vif->bss_conf.beacon_int &&
328 (!iwl_is_associated_ctx(ctx) || !ctx->vif ||
329 !ctx->vif->bss_conf.beacon_int)) {
330 ctx->timing.beacon_interval =
331 priv->contexts[IWL_RXON_CTX_PAN].timing.beacon_interval;
332 beacon_int = le16_to_cpu(ctx->timing.beacon_interval);
333 } else {
334 beacon_int = iwl_adjust_beacon_interval(beacon_int,
335 IWL_MAX_UCODE_BEACON_INTERVAL * TIME_UNIT);
336 ctx->timing.beacon_interval = cpu_to_le16(beacon_int);
337 }
338
339 ctx->beacon_int = beacon_int;
340
341 tsf = priv->timestamp; /* tsf is modifed by do_div: copy it */
342 interval_tm = beacon_int * TIME_UNIT;
343 rem = do_div(tsf, interval_tm);
344 ctx->timing.beacon_init_val = cpu_to_le32(interval_tm - rem);
345
346 ctx->timing.dtim_period = vif ? (vif->bss_conf.dtim_period ?: 1) : 1;
347
348 IWL_DEBUG_ASSOC(priv,
349 "beacon interval %d beacon timer %d beacon tim %d\n",
350 le16_to_cpu(ctx->timing.beacon_interval),
351 le32_to_cpu(ctx->timing.beacon_init_val),
352 le16_to_cpu(ctx->timing.atim_window));
353
354 return iwl_dvm_send_cmd_pdu(priv, ctx->rxon_timing_cmd,
355 CMD_SYNC, sizeof(ctx->timing), &ctx->timing);
356 }
357
358 static int iwlagn_rxon_disconn(struct iwl_priv *priv,
359 struct iwl_rxon_context *ctx)
360 {
361 int ret;
362 struct iwl_rxon_cmd *active = (void *)&ctx->active;
363
364 if (ctx->ctxid == IWL_RXON_CTX_BSS) {
365 ret = iwlagn_disable_bss(priv, ctx, &ctx->staging);
366 } else {
367 ret = iwlagn_disable_pan(priv, ctx, &ctx->staging);
368 if (ret)
369 return ret;
370 if (ctx->vif) {
371 ret = iwl_send_rxon_timing(priv, ctx);
372 if (ret) {
373 IWL_ERR(priv, "Failed to send timing (%d)!\n", ret);
374 return ret;
375 }
376 ret = iwlagn_disconn_pan(priv, ctx, &ctx->staging);
377 }
378 }
379 if (ret)
380 return ret;
381
382 /*
383 * Un-assoc RXON clears the station table and WEP
384 * keys, so we have to restore those afterwards.
385 */
386 iwl_clear_ucode_stations(priv, ctx);
387 /* update -- might need P2P now */
388 iwl_update_bcast_station(priv, ctx);
389 iwl_restore_stations(priv, ctx);
390 ret = iwl_restore_default_wep_keys(priv, ctx);
391 if (ret) {
392 IWL_ERR(priv, "Failed to restore WEP keys (%d)\n", ret);
393 return ret;
394 }
395
396 memcpy(active, &ctx->staging, sizeof(*active));
397 return 0;
398 }
399
400 static int iwl_set_tx_power(struct iwl_priv *priv, s8 tx_power, bool force)
401 {
402 int ret;
403 s8 prev_tx_power;
404 bool defer;
405 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
406
407 if (priv->calib_disabled & IWL_TX_POWER_CALIB_DISABLED)
408 return 0;
409
410 lockdep_assert_held(&priv->mutex);
411
412 if (priv->tx_power_user_lmt == tx_power && !force)
413 return 0;
414
415 if (tx_power < IWLAGN_TX_POWER_TARGET_POWER_MIN) {
416 IWL_WARN(priv,
417 "Requested user TXPOWER %d below lower limit %d.\n",
418 tx_power,
419 IWLAGN_TX_POWER_TARGET_POWER_MIN);
420 return -EINVAL;
421 }
422
423 if (tx_power > DIV_ROUND_UP(priv->nvm_data->max_tx_pwr_half_dbm, 2)) {
424 IWL_WARN(priv,
425 "Requested user TXPOWER %d above upper limit %d.\n",
426 tx_power, priv->nvm_data->max_tx_pwr_half_dbm);
427 return -EINVAL;
428 }
429
430 if (!iwl_is_ready_rf(priv))
431 return -EIO;
432
433 /* scan complete and commit_rxon use tx_power_next value,
434 * it always need to be updated for newest request */
435 priv->tx_power_next = tx_power;
436
437 /* do not set tx power when scanning or channel changing */
438 defer = test_bit(STATUS_SCANNING, &priv->status) ||
439 memcmp(&ctx->active, &ctx->staging, sizeof(ctx->staging));
440 if (defer && !force) {
441 IWL_DEBUG_INFO(priv, "Deferring tx power set\n");
442 return 0;
443 }
444
445 prev_tx_power = priv->tx_power_user_lmt;
446 priv->tx_power_user_lmt = tx_power;
447
448 ret = iwlagn_send_tx_power(priv);
449
450 /* if fail to set tx_power, restore the orig. tx power */
451 if (ret) {
452 priv->tx_power_user_lmt = prev_tx_power;
453 priv->tx_power_next = prev_tx_power;
454 }
455 return ret;
456 }
457
458 static int iwlagn_rxon_connect(struct iwl_priv *priv,
459 struct iwl_rxon_context *ctx)
460 {
461 int ret;
462 struct iwl_rxon_cmd *active = (void *)&ctx->active;
463
464 /* RXON timing must be before associated RXON */
465 if (ctx->ctxid == IWL_RXON_CTX_BSS) {
466 ret = iwl_send_rxon_timing(priv, ctx);
467 if (ret) {
468 IWL_ERR(priv, "Failed to send timing (%d)!\n", ret);
469 return ret;
470 }
471 }
472 /* QoS info may be cleared by previous un-assoc RXON */
473 iwlagn_update_qos(priv, ctx);
474
475 /*
476 * We'll run into this code path when beaconing is
477 * enabled, but then we also need to send the beacon
478 * to the device.
479 */
480 if (ctx->vif && (ctx->vif->type == NL80211_IFTYPE_AP)) {
481 ret = iwlagn_update_beacon(priv, ctx->vif);
482 if (ret) {
483 IWL_ERR(priv,
484 "Error sending required beacon (%d)!\n",
485 ret);
486 return ret;
487 }
488 }
489
490 priv->start_calib = 0;
491 /*
492 * Apply the new configuration.
493 *
494 * Associated RXON doesn't clear the station table in uCode,
495 * so we don't need to restore stations etc. after this.
496 */
497 ret = iwl_dvm_send_cmd_pdu(priv, ctx->rxon_cmd, CMD_SYNC,
498 sizeof(struct iwl_rxon_cmd), &ctx->staging);
499 if (ret) {
500 IWL_ERR(priv, "Error setting new RXON (%d)\n", ret);
501 return ret;
502 }
503 memcpy(active, &ctx->staging, sizeof(*active));
504
505 /* IBSS beacon needs to be sent after setting assoc */
506 if (ctx->vif && (ctx->vif->type == NL80211_IFTYPE_ADHOC))
507 if (iwlagn_update_beacon(priv, ctx->vif))
508 IWL_ERR(priv, "Error sending IBSS beacon\n");
509 iwl_init_sensitivity(priv);
510
511 /*
512 * If we issue a new RXON command which required a tune then
513 * we must send a new TXPOWER command or we won't be able to
514 * Tx any frames.
515 *
516 * It's expected we set power here if channel is changing.
517 */
518 ret = iwl_set_tx_power(priv, priv->tx_power_next, true);
519 if (ret) {
520 IWL_ERR(priv, "Error sending TX power (%d)\n", ret);
521 return ret;
522 }
523
524 if (ctx->vif && ctx->vif->type == NL80211_IFTYPE_STATION &&
525 priv->cfg->ht_params && priv->cfg->ht_params->smps_mode)
526 ieee80211_request_smps(ctx->vif,
527 priv->cfg->ht_params->smps_mode);
528
529 return 0;
530 }
531
532 int iwlagn_set_pan_params(struct iwl_priv *priv)
533 {
534 struct iwl_wipan_params_cmd cmd;
535 struct iwl_rxon_context *ctx_bss, *ctx_pan;
536 int slot0 = 300, slot1 = 0;
537 int ret;
538
539 if (priv->valid_contexts == BIT(IWL_RXON_CTX_BSS))
540 return 0;
541
542 BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
543
544 lockdep_assert_held(&priv->mutex);
545
546 ctx_bss = &priv->contexts[IWL_RXON_CTX_BSS];
547 ctx_pan = &priv->contexts[IWL_RXON_CTX_PAN];
548
549 /*
550 * If the PAN context is inactive, then we don't need
551 * to update the PAN parameters, the last thing we'll
552 * have done before it goes inactive is making the PAN
553 * parameters be WLAN-only.
554 */
555 if (!ctx_pan->is_active)
556 return 0;
557
558 memset(&cmd, 0, sizeof(cmd));
559
560 /* only 2 slots are currently allowed */
561 cmd.num_slots = 2;
562
563 cmd.slots[0].type = 0; /* BSS */
564 cmd.slots[1].type = 1; /* PAN */
565
566 if (priv->hw_roc_setup) {
567 /* both contexts must be used for this to happen */
568 slot1 = IWL_MIN_SLOT_TIME;
569 slot0 = 3000;
570 } else if (ctx_bss->vif && ctx_pan->vif) {
571 int bcnint = ctx_pan->beacon_int;
572 int dtim = ctx_pan->vif->bss_conf.dtim_period ?: 1;
573
574 /* should be set, but seems unused?? */
575 cmd.flags |= cpu_to_le16(IWL_WIPAN_PARAMS_FLG_SLOTTED_MODE);
576
577 if (ctx_pan->vif->type == NL80211_IFTYPE_AP &&
578 bcnint &&
579 bcnint != ctx_bss->beacon_int) {
580 IWL_ERR(priv,
581 "beacon intervals don't match (%d, %d)\n",
582 ctx_bss->beacon_int, ctx_pan->beacon_int);
583 } else
584 bcnint = max_t(int, bcnint,
585 ctx_bss->beacon_int);
586 if (!bcnint)
587 bcnint = DEFAULT_BEACON_INTERVAL;
588 slot0 = bcnint / 2;
589 slot1 = bcnint - slot0;
590
591 if (test_bit(STATUS_SCAN_HW, &priv->status) ||
592 (!ctx_bss->vif->bss_conf.idle &&
593 !ctx_bss->vif->bss_conf.assoc)) {
594 slot0 = dtim * bcnint * 3 - IWL_MIN_SLOT_TIME;
595 slot1 = IWL_MIN_SLOT_TIME;
596 } else if (!ctx_pan->vif->bss_conf.idle &&
597 !ctx_pan->vif->bss_conf.assoc) {
598 slot1 = dtim * bcnint * 3 - IWL_MIN_SLOT_TIME;
599 slot0 = IWL_MIN_SLOT_TIME;
600 }
601 } else if (ctx_pan->vif) {
602 slot0 = 0;
603 slot1 = max_t(int, 1, ctx_pan->vif->bss_conf.dtim_period) *
604 ctx_pan->beacon_int;
605 slot1 = max_t(int, DEFAULT_BEACON_INTERVAL, slot1);
606
607 if (test_bit(STATUS_SCAN_HW, &priv->status)) {
608 slot0 = slot1 * 3 - IWL_MIN_SLOT_TIME;
609 slot1 = IWL_MIN_SLOT_TIME;
610 }
611 }
612
613 cmd.slots[0].width = cpu_to_le16(slot0);
614 cmd.slots[1].width = cpu_to_le16(slot1);
615
616 ret = iwl_dvm_send_cmd_pdu(priv, REPLY_WIPAN_PARAMS, CMD_SYNC,
617 sizeof(cmd), &cmd);
618 if (ret)
619 IWL_ERR(priv, "Error setting PAN parameters (%d)\n", ret);
620
621 return ret;
622 }
623
624 static void _iwl_set_rxon_ht(struct iwl_priv *priv,
625 struct iwl_ht_config *ht_conf,
626 struct iwl_rxon_context *ctx)
627 {
628 struct iwl_rxon_cmd *rxon = &ctx->staging;
629
630 if (!ctx->ht.enabled) {
631 rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |
632 RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK |
633 RXON_FLG_HT40_PROT_MSK |
634 RXON_FLG_HT_PROT_MSK);
635 return;
636 }
637
638 /* FIXME: if the definition of ht.protection changed, the "translation"
639 * will be needed for rxon->flags
640 */
641 rxon->flags |= cpu_to_le32(ctx->ht.protection <<
642 RXON_FLG_HT_OPERATING_MODE_POS);
643
644 /* Set up channel bandwidth:
645 * 20 MHz only, 20/40 mixed or pure 40 if ht40 ok */
646 /* clear the HT channel mode before set the mode */
647 rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |
648 RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
649 if (iwl_is_ht40_tx_allowed(priv, ctx, NULL)) {
650 /* pure ht40 */
651 if (ctx->ht.protection ==
652 IEEE80211_HT_OP_MODE_PROTECTION_20MHZ) {
653 rxon->flags |= RXON_FLG_CHANNEL_MODE_PURE_40;
654 /*
655 * Note: control channel is opposite of extension
656 * channel
657 */
658 switch (ctx->ht.extension_chan_offset) {
659 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
660 rxon->flags &=
661 ~RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
662 break;
663 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
664 rxon->flags |=
665 RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
666 break;
667 }
668 } else {
669 /*
670 * Note: control channel is opposite of extension
671 * channel
672 */
673 switch (ctx->ht.extension_chan_offset) {
674 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
675 rxon->flags &=
676 ~(RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
677 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
678 break;
679 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
680 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
681 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
682 break;
683 case IEEE80211_HT_PARAM_CHA_SEC_NONE:
684 default:
685 /*
686 * channel location only valid if in Mixed
687 * mode
688 */
689 IWL_ERR(priv,
690 "invalid extension channel offset\n");
691 break;
692 }
693 }
694 } else {
695 rxon->flags |= RXON_FLG_CHANNEL_MODE_LEGACY;
696 }
697
698 iwlagn_set_rxon_chain(priv, ctx);
699
700 IWL_DEBUG_ASSOC(priv, "rxon flags 0x%X operation mode :0x%X "
701 "extension channel offset 0x%x\n",
702 le32_to_cpu(rxon->flags), ctx->ht.protection,
703 ctx->ht.extension_chan_offset);
704 }
705
706 void iwl_set_rxon_ht(struct iwl_priv *priv, struct iwl_ht_config *ht_conf)
707 {
708 struct iwl_rxon_context *ctx;
709
710 for_each_context(priv, ctx)
711 _iwl_set_rxon_ht(priv, ht_conf, ctx);
712 }
713
714 /**
715 * iwl_set_rxon_channel - Set the band and channel values in staging RXON
716 * @ch: requested channel as a pointer to struct ieee80211_channel
717
718 * NOTE: Does not commit to the hardware; it sets appropriate bit fields
719 * in the staging RXON flag structure based on the ch->band
720 */
721 void iwl_set_rxon_channel(struct iwl_priv *priv, struct ieee80211_channel *ch,
722 struct iwl_rxon_context *ctx)
723 {
724 enum ieee80211_band band = ch->band;
725 u16 channel = ch->hw_value;
726
727 if ((le16_to_cpu(ctx->staging.channel) == channel) &&
728 (priv->band == band))
729 return;
730
731 ctx->staging.channel = cpu_to_le16(channel);
732 if (band == IEEE80211_BAND_5GHZ)
733 ctx->staging.flags &= ~RXON_FLG_BAND_24G_MSK;
734 else
735 ctx->staging.flags |= RXON_FLG_BAND_24G_MSK;
736
737 priv->band = band;
738
739 IWL_DEBUG_INFO(priv, "Staging channel set to %d [%d]\n", channel, band);
740
741 }
742
743 void iwl_set_flags_for_band(struct iwl_priv *priv,
744 struct iwl_rxon_context *ctx,
745 enum ieee80211_band band,
746 struct ieee80211_vif *vif)
747 {
748 if (band == IEEE80211_BAND_5GHZ) {
749 ctx->staging.flags &=
750 ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK
751 | RXON_FLG_CCK_MSK);
752 ctx->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
753 } else {
754 /* Copied from iwl_post_associate() */
755 if (vif && vif->bss_conf.use_short_slot)
756 ctx->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
757 else
758 ctx->staging.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
759
760 ctx->staging.flags |= RXON_FLG_BAND_24G_MSK;
761 ctx->staging.flags |= RXON_FLG_AUTO_DETECT_MSK;
762 ctx->staging.flags &= ~RXON_FLG_CCK_MSK;
763 }
764 }
765
766 static void iwl_set_rxon_hwcrypto(struct iwl_priv *priv,
767 struct iwl_rxon_context *ctx, int hw_decrypt)
768 {
769 struct iwl_rxon_cmd *rxon = &ctx->staging;
770
771 if (hw_decrypt)
772 rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
773 else
774 rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;
775
776 }
777
778 /* validate RXON structure is valid */
779 static int iwl_check_rxon_cmd(struct iwl_priv *priv,
780 struct iwl_rxon_context *ctx)
781 {
782 struct iwl_rxon_cmd *rxon = &ctx->staging;
783 u32 errors = 0;
784
785 if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
786 if (rxon->flags & RXON_FLG_TGJ_NARROW_BAND_MSK) {
787 IWL_WARN(priv, "check 2.4G: wrong narrow\n");
788 errors |= BIT(0);
789 }
790 if (rxon->flags & RXON_FLG_RADAR_DETECT_MSK) {
791 IWL_WARN(priv, "check 2.4G: wrong radar\n");
792 errors |= BIT(1);
793 }
794 } else {
795 if (!(rxon->flags & RXON_FLG_SHORT_SLOT_MSK)) {
796 IWL_WARN(priv, "check 5.2G: not short slot!\n");
797 errors |= BIT(2);
798 }
799 if (rxon->flags & RXON_FLG_CCK_MSK) {
800 IWL_WARN(priv, "check 5.2G: CCK!\n");
801 errors |= BIT(3);
802 }
803 }
804 if ((rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1) {
805 IWL_WARN(priv, "mac/bssid mcast!\n");
806 errors |= BIT(4);
807 }
808
809 /* make sure basic rates 6Mbps and 1Mbps are supported */
810 if ((rxon->ofdm_basic_rates & IWL_RATE_6M_MASK) == 0 &&
811 (rxon->cck_basic_rates & IWL_RATE_1M_MASK) == 0) {
812 IWL_WARN(priv, "neither 1 nor 6 are basic\n");
813 errors |= BIT(5);
814 }
815
816 if (le16_to_cpu(rxon->assoc_id) > 2007) {
817 IWL_WARN(priv, "aid > 2007\n");
818 errors |= BIT(6);
819 }
820
821 if ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK))
822 == (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK)) {
823 IWL_WARN(priv, "CCK and short slot\n");
824 errors |= BIT(7);
825 }
826
827 if ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK))
828 == (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK)) {
829 IWL_WARN(priv, "CCK and auto detect");
830 errors |= BIT(8);
831 }
832
833 if ((rxon->flags & (RXON_FLG_AUTO_DETECT_MSK |
834 RXON_FLG_TGG_PROTECT_MSK)) ==
835 RXON_FLG_TGG_PROTECT_MSK) {
836 IWL_WARN(priv, "TGg but no auto-detect\n");
837 errors |= BIT(9);
838 }
839
840 if (rxon->channel == 0) {
841 IWL_WARN(priv, "zero channel is invalid\n");
842 errors |= BIT(10);
843 }
844
845 WARN(errors, "Invalid RXON (%#x), channel %d",
846 errors, le16_to_cpu(rxon->channel));
847
848 return errors ? -EINVAL : 0;
849 }
850
851 /**
852 * iwl_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed
853 * @priv: staging_rxon is compared to active_rxon
854 *
855 * If the RXON structure is changing enough to require a new tune,
856 * or is clearing the RXON_FILTER_ASSOC_MSK, then return 1 to indicate that
857 * a new tune (full RXON command, rather than RXON_ASSOC cmd) is required.
858 */
859 static int iwl_full_rxon_required(struct iwl_priv *priv,
860 struct iwl_rxon_context *ctx)
861 {
862 const struct iwl_rxon_cmd *staging = &ctx->staging;
863 const struct iwl_rxon_cmd *active = &ctx->active;
864
865 #define CHK(cond) \
866 if ((cond)) { \
867 IWL_DEBUG_INFO(priv, "need full RXON - " #cond "\n"); \
868 return 1; \
869 }
870
871 #define CHK_NEQ(c1, c2) \
872 if ((c1) != (c2)) { \
873 IWL_DEBUG_INFO(priv, "need full RXON - " \
874 #c1 " != " #c2 " - %d != %d\n", \
875 (c1), (c2)); \
876 return 1; \
877 }
878
879 /* These items are only settable from the full RXON command */
880 CHK(!iwl_is_associated_ctx(ctx));
881 CHK(!ether_addr_equal(staging->bssid_addr, active->bssid_addr));
882 CHK(!ether_addr_equal(staging->node_addr, active->node_addr));
883 CHK(!ether_addr_equal(staging->wlap_bssid_addr,
884 active->wlap_bssid_addr));
885 CHK_NEQ(staging->dev_type, active->dev_type);
886 CHK_NEQ(staging->channel, active->channel);
887 CHK_NEQ(staging->air_propagation, active->air_propagation);
888 CHK_NEQ(staging->ofdm_ht_single_stream_basic_rates,
889 active->ofdm_ht_single_stream_basic_rates);
890 CHK_NEQ(staging->ofdm_ht_dual_stream_basic_rates,
891 active->ofdm_ht_dual_stream_basic_rates);
892 CHK_NEQ(staging->ofdm_ht_triple_stream_basic_rates,
893 active->ofdm_ht_triple_stream_basic_rates);
894 CHK_NEQ(staging->assoc_id, active->assoc_id);
895
896 /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
897 * be updated with the RXON_ASSOC command -- however only some
898 * flag transitions are allowed using RXON_ASSOC */
899
900 /* Check if we are not switching bands */
901 CHK_NEQ(staging->flags & RXON_FLG_BAND_24G_MSK,
902 active->flags & RXON_FLG_BAND_24G_MSK);
903
904 /* Check if we are switching association toggle */
905 CHK_NEQ(staging->filter_flags & RXON_FILTER_ASSOC_MSK,
906 active->filter_flags & RXON_FILTER_ASSOC_MSK);
907
908 #undef CHK
909 #undef CHK_NEQ
910
911 return 0;
912 }
913
914 #ifdef CONFIG_IWLWIFI_DEBUG
915 void iwl_print_rx_config_cmd(struct iwl_priv *priv,
916 enum iwl_rxon_context_id ctxid)
917 {
918 struct iwl_rxon_context *ctx = &priv->contexts[ctxid];
919 struct iwl_rxon_cmd *rxon = &ctx->staging;
920
921 IWL_DEBUG_RADIO(priv, "RX CONFIG:\n");
922 iwl_print_hex_dump(priv, IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
923 IWL_DEBUG_RADIO(priv, "u16 channel: 0x%x\n",
924 le16_to_cpu(rxon->channel));
925 IWL_DEBUG_RADIO(priv, "u32 flags: 0x%08X\n",
926 le32_to_cpu(rxon->flags));
927 IWL_DEBUG_RADIO(priv, "u32 filter_flags: 0x%08x\n",
928 le32_to_cpu(rxon->filter_flags));
929 IWL_DEBUG_RADIO(priv, "u8 dev_type: 0x%x\n", rxon->dev_type);
930 IWL_DEBUG_RADIO(priv, "u8 ofdm_basic_rates: 0x%02x\n",
931 rxon->ofdm_basic_rates);
932 IWL_DEBUG_RADIO(priv, "u8 cck_basic_rates: 0x%02x\n",
933 rxon->cck_basic_rates);
934 IWL_DEBUG_RADIO(priv, "u8[6] node_addr: %pM\n", rxon->node_addr);
935 IWL_DEBUG_RADIO(priv, "u8[6] bssid_addr: %pM\n", rxon->bssid_addr);
936 IWL_DEBUG_RADIO(priv, "u16 assoc_id: 0x%x\n",
937 le16_to_cpu(rxon->assoc_id));
938 }
939 #endif
940
941 static void iwl_calc_basic_rates(struct iwl_priv *priv,
942 struct iwl_rxon_context *ctx)
943 {
944 int lowest_present_ofdm = 100;
945 int lowest_present_cck = 100;
946 u8 cck = 0;
947 u8 ofdm = 0;
948
949 if (ctx->vif) {
950 struct ieee80211_supported_band *sband;
951 unsigned long basic = ctx->vif->bss_conf.basic_rates;
952 int i;
953
954 sband = priv->hw->wiphy->bands[priv->hw->conf.channel->band];
955
956 for_each_set_bit(i, &basic, BITS_PER_LONG) {
957 int hw = sband->bitrates[i].hw_value;
958 if (hw >= IWL_FIRST_OFDM_RATE) {
959 ofdm |= BIT(hw - IWL_FIRST_OFDM_RATE);
960 if (lowest_present_ofdm > hw)
961 lowest_present_ofdm = hw;
962 } else {
963 BUILD_BUG_ON(IWL_FIRST_CCK_RATE != 0);
964
965 cck |= BIT(hw);
966 if (lowest_present_cck > hw)
967 lowest_present_cck = hw;
968 }
969 }
970 }
971
972 /*
973 * Now we've got the basic rates as bitmaps in the ofdm and cck
974 * variables. This isn't sufficient though, as there might not
975 * be all the right rates in the bitmap. E.g. if the only basic
976 * rates are 5.5 Mbps and 11 Mbps, we still need to add 1 Mbps
977 * and 6 Mbps because the 802.11-2007 standard says in 9.6:
978 *
979 * [...] a STA responding to a received frame shall transmit
980 * its Control Response frame [...] at the highest rate in the
981 * BSSBasicRateSet parameter that is less than or equal to the
982 * rate of the immediately previous frame in the frame exchange
983 * sequence ([...]) and that is of the same modulation class
984 * ([...]) as the received frame. If no rate contained in the
985 * BSSBasicRateSet parameter meets these conditions, then the
986 * control frame sent in response to a received frame shall be
987 * transmitted at the highest mandatory rate of the PHY that is
988 * less than or equal to the rate of the received frame, and
989 * that is of the same modulation class as the received frame.
990 *
991 * As a consequence, we need to add all mandatory rates that are
992 * lower than all of the basic rates to these bitmaps.
993 */
994
995 if (IWL_RATE_24M_INDEX < lowest_present_ofdm)
996 ofdm |= IWL_RATE_24M_MASK >> IWL_FIRST_OFDM_RATE;
997 if (IWL_RATE_12M_INDEX < lowest_present_ofdm)
998 ofdm |= IWL_RATE_12M_MASK >> IWL_FIRST_OFDM_RATE;
999 /* 6M already there or needed so always add */
1000 ofdm |= IWL_RATE_6M_MASK >> IWL_FIRST_OFDM_RATE;
1001
1002 /*
1003 * CCK is a bit more complex with DSSS vs. HR/DSSS vs. ERP.
1004 * Note, however:
1005 * - if no CCK rates are basic, it must be ERP since there must
1006 * be some basic rates at all, so they're OFDM => ERP PHY
1007 * (or we're in 5 GHz, and the cck bitmap will never be used)
1008 * - if 11M is a basic rate, it must be ERP as well, so add 5.5M
1009 * - if 5.5M is basic, 1M and 2M are mandatory
1010 * - if 2M is basic, 1M is mandatory
1011 * - if 1M is basic, that's the only valid ACK rate.
1012 * As a consequence, it's not as complicated as it sounds, just add
1013 * any lower rates to the ACK rate bitmap.
1014 */
1015 if (IWL_RATE_11M_INDEX < lowest_present_cck)
1016 cck |= IWL_RATE_11M_MASK >> IWL_FIRST_CCK_RATE;
1017 if (IWL_RATE_5M_INDEX < lowest_present_cck)
1018 cck |= IWL_RATE_5M_MASK >> IWL_FIRST_CCK_RATE;
1019 if (IWL_RATE_2M_INDEX < lowest_present_cck)
1020 cck |= IWL_RATE_2M_MASK >> IWL_FIRST_CCK_RATE;
1021 /* 1M already there or needed so always add */
1022 cck |= IWL_RATE_1M_MASK >> IWL_FIRST_CCK_RATE;
1023
1024 IWL_DEBUG_RATE(priv, "Set basic rates cck:0x%.2x ofdm:0x%.2x\n",
1025 cck, ofdm);
1026
1027 /* "basic_rates" is a misnomer here -- should be called ACK rates */
1028 ctx->staging.cck_basic_rates = cck;
1029 ctx->staging.ofdm_basic_rates = ofdm;
1030 }
1031
1032 /**
1033 * iwlagn_commit_rxon - commit staging_rxon to hardware
1034 *
1035 * The RXON command in staging_rxon is committed to the hardware and
1036 * the active_rxon structure is updated with the new data. This
1037 * function correctly transitions out of the RXON_ASSOC_MSK state if
1038 * a HW tune is required based on the RXON structure changes.
1039 *
1040 * The connect/disconnect flow should be as the following:
1041 *
1042 * 1. make sure send RXON command with association bit unset if not connect
1043 * this should include the channel and the band for the candidate
1044 * to be connected to
1045 * 2. Add Station before RXON association with the AP
1046 * 3. RXON_timing has to send before RXON for connection
1047 * 4. full RXON command - associated bit set
1048 * 5. use RXON_ASSOC command to update any flags changes
1049 */
1050 int iwlagn_commit_rxon(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
1051 {
1052 /* cast away the const for active_rxon in this function */
1053 struct iwl_rxon_cmd *active = (void *)&ctx->active;
1054 bool new_assoc = !!(ctx->staging.filter_flags & RXON_FILTER_ASSOC_MSK);
1055 int ret;
1056
1057 lockdep_assert_held(&priv->mutex);
1058
1059 if (!iwl_is_alive(priv))
1060 return -EBUSY;
1061
1062 /* This function hardcodes a bunch of dual-mode assumptions */
1063 BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
1064
1065 if (!ctx->is_active)
1066 return 0;
1067
1068 /* always get timestamp with Rx frame */
1069 ctx->staging.flags |= RXON_FLG_TSF2HOST_MSK;
1070
1071 /* recalculate basic rates */
1072 iwl_calc_basic_rates(priv, ctx);
1073
1074 /*
1075 * force CTS-to-self frames protection if RTS-CTS is not preferred
1076 * one aggregation protection method
1077 */
1078 if (!priv->hw_params.use_rts_for_aggregation)
1079 ctx->staging.flags |= RXON_FLG_SELF_CTS_EN;
1080
1081 if ((ctx->vif && ctx->vif->bss_conf.use_short_slot) ||
1082 !(ctx->staging.flags & RXON_FLG_BAND_24G_MSK))
1083 ctx->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
1084 else
1085 ctx->staging.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
1086
1087 iwl_print_rx_config_cmd(priv, ctx->ctxid);
1088 ret = iwl_check_rxon_cmd(priv, ctx);
1089 if (ret) {
1090 IWL_ERR(priv, "Invalid RXON configuration. Not committing.\n");
1091 return -EINVAL;
1092 }
1093
1094 /*
1095 * receive commit_rxon request
1096 * abort any previous channel switch if still in process
1097 */
1098 if (test_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status) &&
1099 (priv->switch_channel != ctx->staging.channel)) {
1100 IWL_DEBUG_11H(priv, "abort channel switch on %d\n",
1101 le16_to_cpu(priv->switch_channel));
1102 iwl_chswitch_done(priv, false);
1103 }
1104
1105 /*
1106 * If we don't need to send a full RXON, we can use
1107 * iwl_rxon_assoc_cmd which is used to reconfigure filter
1108 * and other flags for the current radio configuration.
1109 */
1110 if (!iwl_full_rxon_required(priv, ctx)) {
1111 ret = iwlagn_send_rxon_assoc(priv, ctx);
1112 if (ret) {
1113 IWL_ERR(priv, "Error setting RXON_ASSOC (%d)\n", ret);
1114 return ret;
1115 }
1116
1117 memcpy(active, &ctx->staging, sizeof(*active));
1118 /*
1119 * We do not commit tx power settings while channel changing,
1120 * do it now if after settings changed.
1121 */
1122 iwl_set_tx_power(priv, priv->tx_power_next, false);
1123
1124 /* make sure we are in the right PS state */
1125 iwl_power_update_mode(priv, true);
1126
1127 return 0;
1128 }
1129
1130 iwl_set_rxon_hwcrypto(priv, ctx, !iwlwifi_mod_params.sw_crypto);
1131
1132 IWL_DEBUG_INFO(priv,
1133 "Going to commit RXON\n"
1134 " * with%s RXON_FILTER_ASSOC_MSK\n"
1135 " * channel = %d\n"
1136 " * bssid = %pM\n",
1137 (new_assoc ? "" : "out"),
1138 le16_to_cpu(ctx->staging.channel),
1139 ctx->staging.bssid_addr);
1140
1141 /*
1142 * Always clear associated first, but with the correct config.
1143 * This is required as for example station addition for the
1144 * AP station must be done after the BSSID is set to correctly
1145 * set up filters in the device.
1146 */
1147 ret = iwlagn_rxon_disconn(priv, ctx);
1148 if (ret)
1149 return ret;
1150
1151 ret = iwlagn_set_pan_params(priv);
1152 if (ret)
1153 return ret;
1154
1155 if (new_assoc)
1156 return iwlagn_rxon_connect(priv, ctx);
1157
1158 return 0;
1159 }
1160
1161 void iwlagn_config_ht40(struct ieee80211_conf *conf,
1162 struct iwl_rxon_context *ctx)
1163 {
1164 if (conf_is_ht40_minus(conf)) {
1165 ctx->ht.extension_chan_offset =
1166 IEEE80211_HT_PARAM_CHA_SEC_BELOW;
1167 ctx->ht.is_40mhz = true;
1168 } else if (conf_is_ht40_plus(conf)) {
1169 ctx->ht.extension_chan_offset =
1170 IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
1171 ctx->ht.is_40mhz = true;
1172 } else {
1173 ctx->ht.extension_chan_offset =
1174 IEEE80211_HT_PARAM_CHA_SEC_NONE;
1175 ctx->ht.is_40mhz = false;
1176 }
1177 }
1178
1179 int iwlagn_mac_config(struct ieee80211_hw *hw, u32 changed)
1180 {
1181 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1182 struct iwl_rxon_context *ctx;
1183 struct ieee80211_conf *conf = &hw->conf;
1184 struct ieee80211_channel *channel = conf->channel;
1185 int ret = 0;
1186
1187 IWL_DEBUG_MAC80211(priv, "enter: changed %#x\n", changed);
1188
1189 mutex_lock(&priv->mutex);
1190
1191 if (unlikely(test_bit(STATUS_SCANNING, &priv->status))) {
1192 IWL_DEBUG_MAC80211(priv, "leave - scanning\n");
1193 goto out;
1194 }
1195
1196 if (!iwl_is_ready(priv)) {
1197 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
1198 goto out;
1199 }
1200
1201 if (changed & (IEEE80211_CONF_CHANGE_SMPS |
1202 IEEE80211_CONF_CHANGE_CHANNEL)) {
1203 /* mac80211 uses static for non-HT which is what we want */
1204 priv->current_ht_config.smps = conf->smps_mode;
1205
1206 /*
1207 * Recalculate chain counts.
1208 *
1209 * If monitor mode is enabled then mac80211 will
1210 * set up the SM PS mode to OFF if an HT channel is
1211 * configured.
1212 */
1213 for_each_context(priv, ctx)
1214 iwlagn_set_rxon_chain(priv, ctx);
1215 }
1216
1217 if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
1218 for_each_context(priv, ctx) {
1219 /* Configure HT40 channels */
1220 if (ctx->ht.enabled != conf_is_ht(conf))
1221 ctx->ht.enabled = conf_is_ht(conf);
1222
1223 if (ctx->ht.enabled) {
1224 /* if HT40 is used, it should not change
1225 * after associated except channel switch */
1226 if (!ctx->ht.is_40mhz ||
1227 !iwl_is_associated_ctx(ctx))
1228 iwlagn_config_ht40(conf, ctx);
1229 } else
1230 ctx->ht.is_40mhz = false;
1231
1232 /*
1233 * Default to no protection. Protection mode will
1234 * later be set from BSS config in iwl_ht_conf
1235 */
1236 ctx->ht.protection = IEEE80211_HT_OP_MODE_PROTECTION_NONE;
1237
1238 /* if we are switching from ht to 2.4 clear flags
1239 * from any ht related info since 2.4 does not
1240 * support ht */
1241 if (le16_to_cpu(ctx->staging.channel) !=
1242 channel->hw_value)
1243 ctx->staging.flags = 0;
1244
1245 iwl_set_rxon_channel(priv, channel, ctx);
1246 iwl_set_rxon_ht(priv, &priv->current_ht_config);
1247
1248 iwl_set_flags_for_band(priv, ctx, channel->band,
1249 ctx->vif);
1250 }
1251
1252 iwl_update_bcast_stations(priv);
1253 }
1254
1255 if (changed & (IEEE80211_CONF_CHANGE_PS |
1256 IEEE80211_CONF_CHANGE_IDLE)) {
1257 ret = iwl_power_update_mode(priv, false);
1258 if (ret)
1259 IWL_DEBUG_MAC80211(priv, "Error setting sleep level\n");
1260 }
1261
1262 if (changed & IEEE80211_CONF_CHANGE_POWER) {
1263 IWL_DEBUG_MAC80211(priv, "TX Power old=%d new=%d\n",
1264 priv->tx_power_user_lmt, conf->power_level);
1265
1266 iwl_set_tx_power(priv, conf->power_level, false);
1267 }
1268
1269 for_each_context(priv, ctx) {
1270 if (!memcmp(&ctx->staging, &ctx->active, sizeof(ctx->staging)))
1271 continue;
1272 iwlagn_commit_rxon(priv, ctx);
1273 }
1274 out:
1275 mutex_unlock(&priv->mutex);
1276 IWL_DEBUG_MAC80211(priv, "leave\n");
1277
1278 return ret;
1279 }
1280
1281 static void iwlagn_check_needed_chains(struct iwl_priv *priv,
1282 struct iwl_rxon_context *ctx,
1283 struct ieee80211_bss_conf *bss_conf)
1284 {
1285 struct ieee80211_vif *vif = ctx->vif;
1286 struct iwl_rxon_context *tmp;
1287 struct ieee80211_sta *sta;
1288 struct iwl_ht_config *ht_conf = &priv->current_ht_config;
1289 struct ieee80211_sta_ht_cap *ht_cap;
1290 bool need_multiple;
1291
1292 lockdep_assert_held(&priv->mutex);
1293
1294 switch (vif->type) {
1295 case NL80211_IFTYPE_STATION:
1296 rcu_read_lock();
1297 sta = ieee80211_find_sta(vif, bss_conf->bssid);
1298 if (!sta) {
1299 /*
1300 * If at all, this can only happen through a race
1301 * when the AP disconnects us while we're still
1302 * setting up the connection, in that case mac80211
1303 * will soon tell us about that.
1304 */
1305 need_multiple = false;
1306 rcu_read_unlock();
1307 break;
1308 }
1309
1310 ht_cap = &sta->ht_cap;
1311
1312 need_multiple = true;
1313
1314 /*
1315 * If the peer advertises no support for receiving 2 and 3
1316 * stream MCS rates, it can't be transmitting them either.
1317 */
1318 if (ht_cap->mcs.rx_mask[1] == 0 &&
1319 ht_cap->mcs.rx_mask[2] == 0) {
1320 need_multiple = false;
1321 } else if (!(ht_cap->mcs.tx_params &
1322 IEEE80211_HT_MCS_TX_DEFINED)) {
1323 /* If it can't TX MCS at all ... */
1324 need_multiple = false;
1325 } else if (ht_cap->mcs.tx_params &
1326 IEEE80211_HT_MCS_TX_RX_DIFF) {
1327 int maxstreams;
1328
1329 /*
1330 * But if it can receive them, it might still not
1331 * be able to transmit them, which is what we need
1332 * to check here -- so check the number of streams
1333 * it advertises for TX (if different from RX).
1334 */
1335
1336 maxstreams = (ht_cap->mcs.tx_params &
1337 IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK);
1338 maxstreams >>=
1339 IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT;
1340 maxstreams += 1;
1341
1342 if (maxstreams <= 1)
1343 need_multiple = false;
1344 }
1345
1346 rcu_read_unlock();
1347 break;
1348 case NL80211_IFTYPE_ADHOC:
1349 /* currently */
1350 need_multiple = false;
1351 break;
1352 default:
1353 /* only AP really */
1354 need_multiple = true;
1355 break;
1356 }
1357
1358 ctx->ht_need_multiple_chains = need_multiple;
1359
1360 if (!need_multiple) {
1361 /* check all contexts */
1362 for_each_context(priv, tmp) {
1363 if (!tmp->vif)
1364 continue;
1365 if (tmp->ht_need_multiple_chains) {
1366 need_multiple = true;
1367 break;
1368 }
1369 }
1370 }
1371
1372 ht_conf->single_chain_sufficient = !need_multiple;
1373 }
1374
1375 static void iwlagn_chain_noise_reset(struct iwl_priv *priv)
1376 {
1377 struct iwl_chain_noise_data *data = &priv->chain_noise_data;
1378 int ret;
1379
1380 if (!(priv->calib_disabled & IWL_CHAIN_NOISE_CALIB_DISABLED))
1381 return;
1382
1383 if ((data->state == IWL_CHAIN_NOISE_ALIVE) &&
1384 iwl_is_any_associated(priv)) {
1385 struct iwl_calib_chain_noise_reset_cmd cmd;
1386
1387 /* clear data for chain noise calibration algorithm */
1388 data->chain_noise_a = 0;
1389 data->chain_noise_b = 0;
1390 data->chain_noise_c = 0;
1391 data->chain_signal_a = 0;
1392 data->chain_signal_b = 0;
1393 data->chain_signal_c = 0;
1394 data->beacon_count = 0;
1395
1396 memset(&cmd, 0, sizeof(cmd));
1397 iwl_set_calib_hdr(&cmd.hdr,
1398 priv->phy_calib_chain_noise_reset_cmd);
1399 ret = iwl_dvm_send_cmd_pdu(priv,
1400 REPLY_PHY_CALIBRATION_CMD,
1401 CMD_SYNC, sizeof(cmd), &cmd);
1402 if (ret)
1403 IWL_ERR(priv,
1404 "Could not send REPLY_PHY_CALIBRATION_CMD\n");
1405 data->state = IWL_CHAIN_NOISE_ACCUMULATE;
1406 IWL_DEBUG_CALIB(priv, "Run chain_noise_calibrate\n");
1407 }
1408 }
1409
1410 void iwlagn_bss_info_changed(struct ieee80211_hw *hw,
1411 struct ieee80211_vif *vif,
1412 struct ieee80211_bss_conf *bss_conf,
1413 u32 changes)
1414 {
1415 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1416 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1417 int ret;
1418 bool force = false;
1419
1420 mutex_lock(&priv->mutex);
1421
1422 if (changes & BSS_CHANGED_IDLE && bss_conf->idle) {
1423 /*
1424 * If we go idle, then clearly no "passive-no-rx"
1425 * workaround is needed any more, this is a reset.
1426 */
1427 iwlagn_lift_passive_no_rx(priv);
1428 }
1429
1430 if (unlikely(!iwl_is_ready(priv))) {
1431 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
1432 mutex_unlock(&priv->mutex);
1433 return;
1434 }
1435
1436 if (unlikely(!ctx->vif)) {
1437 IWL_DEBUG_MAC80211(priv, "leave - vif is NULL\n");
1438 mutex_unlock(&priv->mutex);
1439 return;
1440 }
1441
1442 if (changes & BSS_CHANGED_BEACON_INT)
1443 force = true;
1444
1445 if (changes & BSS_CHANGED_QOS) {
1446 ctx->qos_data.qos_active = bss_conf->qos;
1447 iwlagn_update_qos(priv, ctx);
1448 }
1449
1450 ctx->staging.assoc_id = cpu_to_le16(vif->bss_conf.aid);
1451 if (vif->bss_conf.use_short_preamble)
1452 ctx->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
1453 else
1454 ctx->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
1455
1456 if (changes & BSS_CHANGED_ASSOC) {
1457 if (bss_conf->assoc) {
1458 priv->timestamp = bss_conf->sync_tsf;
1459 ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
1460 } else {
1461 ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
1462
1463 if (ctx->ctxid == IWL_RXON_CTX_BSS)
1464 priv->have_rekey_data = false;
1465 }
1466
1467 iwlagn_bt_coex_rssi_monitor(priv);
1468 }
1469
1470 if (ctx->ht.enabled) {
1471 ctx->ht.protection = bss_conf->ht_operation_mode &
1472 IEEE80211_HT_OP_MODE_PROTECTION;
1473 ctx->ht.non_gf_sta_present = !!(bss_conf->ht_operation_mode &
1474 IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT);
1475 iwlagn_check_needed_chains(priv, ctx, bss_conf);
1476 iwl_set_rxon_ht(priv, &priv->current_ht_config);
1477 }
1478
1479 iwlagn_set_rxon_chain(priv, ctx);
1480
1481 if (bss_conf->use_cts_prot && (priv->band != IEEE80211_BAND_5GHZ))
1482 ctx->staging.flags |= RXON_FLG_TGG_PROTECT_MSK;
1483 else
1484 ctx->staging.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
1485
1486 if (bss_conf->use_cts_prot)
1487 ctx->staging.flags |= RXON_FLG_SELF_CTS_EN;
1488 else
1489 ctx->staging.flags &= ~RXON_FLG_SELF_CTS_EN;
1490
1491 memcpy(ctx->staging.bssid_addr, bss_conf->bssid, ETH_ALEN);
1492
1493 if (vif->type == NL80211_IFTYPE_AP ||
1494 vif->type == NL80211_IFTYPE_ADHOC) {
1495 if (vif->bss_conf.enable_beacon) {
1496 ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
1497 priv->beacon_ctx = ctx;
1498 } else {
1499 ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
1500 priv->beacon_ctx = NULL;
1501 }
1502 }
1503
1504 /*
1505 * If the ucode decides to do beacon filtering before
1506 * association, it will lose beacons that are needed
1507 * before sending frames out on passive channels. This
1508 * causes association failures on those channels. Enable
1509 * receiving beacons in such cases.
1510 */
1511
1512 if (vif->type == NL80211_IFTYPE_STATION) {
1513 if (!bss_conf->assoc)
1514 ctx->staging.filter_flags |= RXON_FILTER_BCON_AWARE_MSK;
1515 else
1516 ctx->staging.filter_flags &=
1517 ~RXON_FILTER_BCON_AWARE_MSK;
1518 }
1519
1520 if (force || memcmp(&ctx->staging, &ctx->active, sizeof(ctx->staging)))
1521 iwlagn_commit_rxon(priv, ctx);
1522
1523 if (changes & BSS_CHANGED_ASSOC && bss_conf->assoc) {
1524 /*
1525 * The chain noise calibration will enable PM upon
1526 * completion. If calibration has already been run
1527 * then we need to enable power management here.
1528 */
1529 if (priv->chain_noise_data.state == IWL_CHAIN_NOISE_DONE)
1530 iwl_power_update_mode(priv, false);
1531
1532 /* Enable RX differential gain and sensitivity calibrations */
1533 iwlagn_chain_noise_reset(priv);
1534 priv->start_calib = 1;
1535 }
1536
1537 if (changes & BSS_CHANGED_IBSS) {
1538 ret = iwlagn_manage_ibss_station(priv, vif,
1539 bss_conf->ibss_joined);
1540 if (ret)
1541 IWL_ERR(priv, "failed to %s IBSS station %pM\n",
1542 bss_conf->ibss_joined ? "add" : "remove",
1543 bss_conf->bssid);
1544 }
1545
1546 if (changes & BSS_CHANGED_BEACON && priv->beacon_ctx == ctx) {
1547 if (iwlagn_update_beacon(priv, vif))
1548 IWL_ERR(priv, "Error updating beacon\n");
1549 }
1550
1551 mutex_unlock(&priv->mutex);
1552 }
1553
1554 void iwlagn_post_scan(struct iwl_priv *priv)
1555 {
1556 struct iwl_rxon_context *ctx;
1557
1558 /*
1559 * We do not commit power settings while scan is pending,
1560 * do it now if the settings changed.
1561 */
1562 iwl_power_set_mode(priv, &priv->power_data.sleep_cmd_next, false);
1563 iwl_set_tx_power(priv, priv->tx_power_next, false);
1564
1565 /*
1566 * Since setting the RXON may have been deferred while
1567 * performing the scan, fire one off if needed
1568 */
1569 for_each_context(priv, ctx)
1570 if (memcmp(&ctx->staging, &ctx->active, sizeof(ctx->staging)))
1571 iwlagn_commit_rxon(priv, ctx);
1572
1573 iwlagn_set_pan_params(priv);
1574 }
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