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Merge branch 'for-linus-4.3' of git://git.kernel.org/pub/scm/linux/kernel/git/mason...
[deliverable/linux.git] / drivers / net / wireless / iwlwifi / dvm / rxon.c
1 /******************************************************************************
2 *
3 * Copyright(c) 2003 - 2014 Intel Corporation. All rights reserved.
4 * Copyright(c) 2015 Intel Deutschland GmbH
5 *
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of version 2 of the GNU General Public License as
8 * published by the Free Software Foundation.
9 *
10 * This program is distributed in the hope that it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
13 * more details.
14 *
15 * You should have received a copy of the GNU General Public License along with
16 * this program; if not, write to the Free Software Foundation, Inc.,
17 * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
18 *
19 * The full GNU General Public License is included in this distribution in the
20 * file called LICENSE.
21 *
22 * Contact Information:
23 * Intel Linux Wireless <ilw@linux.intel.com>
24 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
25 *
26 *****************************************************************************/
27
28 #include <linux/etherdevice.h>
29 #include "iwl-trans.h"
30 #include "iwl-modparams.h"
31 #include "dev.h"
32 #include "agn.h"
33 #include "calib.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 memset(&ctx->staging, 0, sizeof(ctx->staging));
42
43 if (!ctx->vif) {
44 ctx->staging.dev_type = ctx->unused_devtype;
45 } else
46 switch (ctx->vif->type) {
47 case NL80211_IFTYPE_AP:
48 ctx->staging.dev_type = ctx->ap_devtype;
49 break;
50
51 case NL80211_IFTYPE_STATION:
52 ctx->staging.dev_type = ctx->station_devtype;
53 ctx->staging.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
54 break;
55
56 case NL80211_IFTYPE_ADHOC:
57 ctx->staging.dev_type = ctx->ibss_devtype;
58 ctx->staging.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
59 ctx->staging.filter_flags = RXON_FILTER_BCON_AWARE_MSK |
60 RXON_FILTER_ACCEPT_GRP_MSK;
61 break;
62
63 case NL80211_IFTYPE_MONITOR:
64 ctx->staging.dev_type = RXON_DEV_TYPE_SNIFFER;
65 break;
66
67 default:
68 IWL_ERR(priv, "Unsupported interface type %d\n",
69 ctx->vif->type);
70 break;
71 }
72
73 #if 0
74 /* TODO: Figure out when short_preamble would be set and cache from
75 * that */
76 if (!hw_to_local(priv->hw)->short_preamble)
77 ctx->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
78 else
79 ctx->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
80 #endif
81
82 ctx->staging.channel =
83 cpu_to_le16(priv->hw->conf.chandef.chan->hw_value);
84 priv->band = priv->hw->conf.chandef.chan->band;
85
86 iwl_set_flags_for_band(priv, ctx, priv->band, ctx->vif);
87
88 /* clear both MIX and PURE40 mode flag */
89 ctx->staging.flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED |
90 RXON_FLG_CHANNEL_MODE_PURE_40);
91 if (ctx->vif)
92 memcpy(ctx->staging.node_addr, ctx->vif->addr, ETH_ALEN);
93
94 ctx->staging.ofdm_ht_single_stream_basic_rates = 0xff;
95 ctx->staging.ofdm_ht_dual_stream_basic_rates = 0xff;
96 ctx->staging.ofdm_ht_triple_stream_basic_rates = 0xff;
97 }
98
99 static int iwlagn_disable_bss(struct iwl_priv *priv,
100 struct iwl_rxon_context *ctx,
101 struct iwl_rxon_cmd *send)
102 {
103 __le32 old_filter = send->filter_flags;
104 int ret;
105
106 send->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
107 ret = iwl_dvm_send_cmd_pdu(priv, ctx->rxon_cmd,
108 0, sizeof(*send), send);
109
110 send->filter_flags = old_filter;
111
112 if (ret)
113 IWL_DEBUG_QUIET_RFKILL(priv,
114 "Error clearing ASSOC_MSK on BSS (%d)\n", ret);
115
116 return ret;
117 }
118
119 static int iwlagn_disable_pan(struct iwl_priv *priv,
120 struct iwl_rxon_context *ctx,
121 struct iwl_rxon_cmd *send)
122 {
123 struct iwl_notification_wait disable_wait;
124 __le32 old_filter = send->filter_flags;
125 u8 old_dev_type = send->dev_type;
126 int ret;
127 static const u16 deactivate_cmd[] = {
128 REPLY_WIPAN_DEACTIVATION_COMPLETE
129 };
130
131 iwl_init_notification_wait(&priv->notif_wait, &disable_wait,
132 deactivate_cmd, ARRAY_SIZE(deactivate_cmd),
133 NULL, NULL);
134
135 send->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
136 send->dev_type = RXON_DEV_TYPE_P2P;
137 ret = iwl_dvm_send_cmd_pdu(priv, ctx->rxon_cmd,
138 0, sizeof(*send), send);
139
140 send->filter_flags = old_filter;
141 send->dev_type = old_dev_type;
142
143 if (ret) {
144 IWL_ERR(priv, "Error disabling PAN (%d)\n", ret);
145 iwl_remove_notification(&priv->notif_wait, &disable_wait);
146 } else {
147 ret = iwl_wait_notification(&priv->notif_wait,
148 &disable_wait, HZ);
149 if (ret)
150 IWL_ERR(priv, "Timed out waiting for PAN disable\n");
151 }
152
153 return ret;
154 }
155
156 static int iwlagn_disconn_pan(struct iwl_priv *priv,
157 struct iwl_rxon_context *ctx,
158 struct iwl_rxon_cmd *send)
159 {
160 __le32 old_filter = send->filter_flags;
161 int ret;
162
163 send->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
164 ret = iwl_dvm_send_cmd_pdu(priv, ctx->rxon_cmd, 0,
165 sizeof(*send), send);
166
167 send->filter_flags = old_filter;
168
169 return ret;
170 }
171
172 static void iwlagn_update_qos(struct iwl_priv *priv,
173 struct iwl_rxon_context *ctx)
174 {
175 int ret;
176
177 if (!ctx->is_active)
178 return;
179
180 ctx->qos_data.def_qos_parm.qos_flags = 0;
181
182 if (ctx->qos_data.qos_active)
183 ctx->qos_data.def_qos_parm.qos_flags |=
184 QOS_PARAM_FLG_UPDATE_EDCA_MSK;
185
186 if (ctx->ht.enabled)
187 ctx->qos_data.def_qos_parm.qos_flags |= QOS_PARAM_FLG_TGN_MSK;
188
189 IWL_DEBUG_INFO(priv, "send QoS cmd with Qos active=%d FLAGS=0x%X\n",
190 ctx->qos_data.qos_active,
191 ctx->qos_data.def_qos_parm.qos_flags);
192
193 ret = iwl_dvm_send_cmd_pdu(priv, ctx->qos_cmd, 0,
194 sizeof(struct iwl_qosparam_cmd),
195 &ctx->qos_data.def_qos_parm);
196 if (ret)
197 IWL_DEBUG_QUIET_RFKILL(priv, "Failed to update QoS\n");
198 }
199
200 static int iwlagn_update_beacon(struct iwl_priv *priv,
201 struct ieee80211_vif *vif)
202 {
203 lockdep_assert_held(&priv->mutex);
204
205 dev_kfree_skb(priv->beacon_skb);
206 priv->beacon_skb = ieee80211_beacon_get(priv->hw, vif);
207 if (!priv->beacon_skb)
208 return -ENOMEM;
209 return iwlagn_send_beacon_cmd(priv);
210 }
211
212 static int iwlagn_send_rxon_assoc(struct iwl_priv *priv,
213 struct iwl_rxon_context *ctx)
214 {
215 int ret = 0;
216 struct iwl_rxon_assoc_cmd rxon_assoc;
217 const struct iwl_rxon_cmd *rxon1 = &ctx->staging;
218 const struct iwl_rxon_cmd *rxon2 = &ctx->active;
219
220 if ((rxon1->flags == rxon2->flags) &&
221 (rxon1->filter_flags == rxon2->filter_flags) &&
222 (rxon1->cck_basic_rates == rxon2->cck_basic_rates) &&
223 (rxon1->ofdm_ht_single_stream_basic_rates ==
224 rxon2->ofdm_ht_single_stream_basic_rates) &&
225 (rxon1->ofdm_ht_dual_stream_basic_rates ==
226 rxon2->ofdm_ht_dual_stream_basic_rates) &&
227 (rxon1->ofdm_ht_triple_stream_basic_rates ==
228 rxon2->ofdm_ht_triple_stream_basic_rates) &&
229 (rxon1->acquisition_data == rxon2->acquisition_data) &&
230 (rxon1->rx_chain == rxon2->rx_chain) &&
231 (rxon1->ofdm_basic_rates == rxon2->ofdm_basic_rates)) {
232 IWL_DEBUG_INFO(priv, "Using current RXON_ASSOC. Not resending.\n");
233 return 0;
234 }
235
236 rxon_assoc.flags = ctx->staging.flags;
237 rxon_assoc.filter_flags = ctx->staging.filter_flags;
238 rxon_assoc.ofdm_basic_rates = ctx->staging.ofdm_basic_rates;
239 rxon_assoc.cck_basic_rates = ctx->staging.cck_basic_rates;
240 rxon_assoc.reserved1 = 0;
241 rxon_assoc.reserved2 = 0;
242 rxon_assoc.reserved3 = 0;
243 rxon_assoc.ofdm_ht_single_stream_basic_rates =
244 ctx->staging.ofdm_ht_single_stream_basic_rates;
245 rxon_assoc.ofdm_ht_dual_stream_basic_rates =
246 ctx->staging.ofdm_ht_dual_stream_basic_rates;
247 rxon_assoc.rx_chain_select_flags = ctx->staging.rx_chain;
248 rxon_assoc.ofdm_ht_triple_stream_basic_rates =
249 ctx->staging.ofdm_ht_triple_stream_basic_rates;
250 rxon_assoc.acquisition_data = ctx->staging.acquisition_data;
251
252 ret = iwl_dvm_send_cmd_pdu(priv, ctx->rxon_assoc_cmd,
253 CMD_ASYNC, sizeof(rxon_assoc), &rxon_assoc);
254 return ret;
255 }
256
257 static u16 iwl_adjust_beacon_interval(u16 beacon_val, u16 max_beacon_val)
258 {
259 u16 new_val;
260 u16 beacon_factor;
261
262 /*
263 * If mac80211 hasn't given us a beacon interval, program
264 * the default into the device (not checking this here
265 * would cause the adjustment below to return the maximum
266 * value, which may break PAN.)
267 */
268 if (!beacon_val)
269 return DEFAULT_BEACON_INTERVAL;
270
271 /*
272 * If the beacon interval we obtained from the peer
273 * is too large, we'll have to wake up more often
274 * (and in IBSS case, we'll beacon too much)
275 *
276 * For example, if max_beacon_val is 4096, and the
277 * requested beacon interval is 7000, we'll have to
278 * use 3500 to be able to wake up on the beacons.
279 *
280 * This could badly influence beacon detection stats.
281 */
282
283 beacon_factor = (beacon_val + max_beacon_val) / max_beacon_val;
284 new_val = beacon_val / beacon_factor;
285
286 if (!new_val)
287 new_val = max_beacon_val;
288
289 return new_val;
290 }
291
292 static int iwl_send_rxon_timing(struct iwl_priv *priv,
293 struct iwl_rxon_context *ctx)
294 {
295 u64 tsf;
296 s32 interval_tm, rem;
297 struct ieee80211_conf *conf = NULL;
298 u16 beacon_int;
299 struct ieee80211_vif *vif = ctx->vif;
300
301 conf = &priv->hw->conf;
302
303 lockdep_assert_held(&priv->mutex);
304
305 memset(&ctx->timing, 0, sizeof(struct iwl_rxon_time_cmd));
306
307 ctx->timing.timestamp = cpu_to_le64(priv->timestamp);
308 ctx->timing.listen_interval = cpu_to_le16(conf->listen_interval);
309
310 beacon_int = vif ? vif->bss_conf.beacon_int : 0;
311
312 /*
313 * TODO: For IBSS we need to get atim_window from mac80211,
314 * for now just always use 0
315 */
316 ctx->timing.atim_window = 0;
317
318 if (ctx->ctxid == IWL_RXON_CTX_PAN &&
319 (!ctx->vif || ctx->vif->type != NL80211_IFTYPE_STATION) &&
320 iwl_is_associated(priv, IWL_RXON_CTX_BSS) &&
321 priv->contexts[IWL_RXON_CTX_BSS].vif &&
322 priv->contexts[IWL_RXON_CTX_BSS].vif->bss_conf.beacon_int) {
323 ctx->timing.beacon_interval =
324 priv->contexts[IWL_RXON_CTX_BSS].timing.beacon_interval;
325 beacon_int = le16_to_cpu(ctx->timing.beacon_interval);
326 } else if (ctx->ctxid == IWL_RXON_CTX_BSS &&
327 iwl_is_associated(priv, IWL_RXON_CTX_PAN) &&
328 priv->contexts[IWL_RXON_CTX_PAN].vif &&
329 priv->contexts[IWL_RXON_CTX_PAN].vif->bss_conf.beacon_int &&
330 (!iwl_is_associated_ctx(ctx) || !ctx->vif ||
331 !ctx->vif->bss_conf.beacon_int)) {
332 ctx->timing.beacon_interval =
333 priv->contexts[IWL_RXON_CTX_PAN].timing.beacon_interval;
334 beacon_int = le16_to_cpu(ctx->timing.beacon_interval);
335 } else {
336 beacon_int = iwl_adjust_beacon_interval(beacon_int,
337 IWL_MAX_UCODE_BEACON_INTERVAL * TIME_UNIT);
338 ctx->timing.beacon_interval = cpu_to_le16(beacon_int);
339 }
340
341 ctx->beacon_int = beacon_int;
342
343 tsf = priv->timestamp; /* tsf is modifed by do_div: copy it */
344 interval_tm = beacon_int * TIME_UNIT;
345 rem = do_div(tsf, interval_tm);
346 ctx->timing.beacon_init_val = cpu_to_le32(interval_tm - rem);
347
348 ctx->timing.dtim_period = vif ? (vif->bss_conf.dtim_period ?: 1) : 1;
349
350 IWL_DEBUG_ASSOC(priv,
351 "beacon interval %d beacon timer %d beacon tim %d\n",
352 le16_to_cpu(ctx->timing.beacon_interval),
353 le32_to_cpu(ctx->timing.beacon_init_val),
354 le16_to_cpu(ctx->timing.atim_window));
355
356 return iwl_dvm_send_cmd_pdu(priv, ctx->rxon_timing_cmd,
357 0, sizeof(ctx->timing), &ctx->timing);
358 }
359
360 static int iwlagn_rxon_disconn(struct iwl_priv *priv,
361 struct iwl_rxon_context *ctx)
362 {
363 int ret;
364 struct iwl_rxon_cmd *active = (void *)&ctx->active;
365
366 if (ctx->ctxid == IWL_RXON_CTX_BSS) {
367 ret = iwlagn_disable_bss(priv, ctx, &ctx->staging);
368 } else {
369 ret = iwlagn_disable_pan(priv, ctx, &ctx->staging);
370 if (ret)
371 return ret;
372 if (ctx->vif) {
373 ret = iwl_send_rxon_timing(priv, ctx);
374 if (ret) {
375 IWL_ERR(priv, "Failed to send timing (%d)!\n", ret);
376 return ret;
377 }
378 ret = iwlagn_disconn_pan(priv, ctx, &ctx->staging);
379 }
380 }
381 if (ret)
382 return ret;
383
384 /*
385 * Un-assoc RXON clears the station table and WEP
386 * keys, so we have to restore those afterwards.
387 */
388 iwl_clear_ucode_stations(priv, ctx);
389 /* update -- might need P2P now */
390 iwl_update_bcast_station(priv, ctx);
391 iwl_restore_stations(priv, ctx);
392 ret = iwl_restore_default_wep_keys(priv, ctx);
393 if (ret) {
394 IWL_ERR(priv, "Failed to restore WEP keys (%d)\n", ret);
395 return ret;
396 }
397
398 memcpy(active, &ctx->staging, sizeof(*active));
399 return 0;
400 }
401
402 static int iwl_set_tx_power(struct iwl_priv *priv, s8 tx_power, bool force)
403 {
404 int ret;
405 s8 prev_tx_power;
406 bool defer;
407 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
408
409 if (priv->calib_disabled & IWL_TX_POWER_CALIB_DISABLED)
410 return 0;
411
412 lockdep_assert_held(&priv->mutex);
413
414 if (priv->tx_power_user_lmt == tx_power && !force)
415 return 0;
416
417 if (tx_power < IWLAGN_TX_POWER_TARGET_POWER_MIN) {
418 IWL_WARN(priv,
419 "Requested user TXPOWER %d below lower limit %d.\n",
420 tx_power,
421 IWLAGN_TX_POWER_TARGET_POWER_MIN);
422 return -EINVAL;
423 }
424
425 if (tx_power > DIV_ROUND_UP(priv->nvm_data->max_tx_pwr_half_dbm, 2)) {
426 IWL_WARN(priv,
427 "Requested user TXPOWER %d above upper limit %d.\n",
428 tx_power, priv->nvm_data->max_tx_pwr_half_dbm);
429 return -EINVAL;
430 }
431
432 if (!iwl_is_ready_rf(priv))
433 return -EIO;
434
435 /* scan complete and commit_rxon use tx_power_next value,
436 * it always need to be updated for newest request */
437 priv->tx_power_next = tx_power;
438
439 /* do not set tx power when scanning or channel changing */
440 defer = test_bit(STATUS_SCANNING, &priv->status) ||
441 memcmp(&ctx->active, &ctx->staging, sizeof(ctx->staging));
442 if (defer && !force) {
443 IWL_DEBUG_INFO(priv, "Deferring tx power set\n");
444 return 0;
445 }
446
447 prev_tx_power = priv->tx_power_user_lmt;
448 priv->tx_power_user_lmt = tx_power;
449
450 ret = iwlagn_send_tx_power(priv);
451
452 /* if fail to set tx_power, restore the orig. tx power */
453 if (ret) {
454 priv->tx_power_user_lmt = prev_tx_power;
455 priv->tx_power_next = prev_tx_power;
456 }
457 return ret;
458 }
459
460 static int iwlagn_rxon_connect(struct iwl_priv *priv,
461 struct iwl_rxon_context *ctx)
462 {
463 int ret;
464 struct iwl_rxon_cmd *active = (void *)&ctx->active;
465
466 /* RXON timing must be before associated RXON */
467 if (ctx->ctxid == IWL_RXON_CTX_BSS) {
468 ret = iwl_send_rxon_timing(priv, ctx);
469 if (ret) {
470 IWL_ERR(priv, "Failed to send timing (%d)!\n", ret);
471 return ret;
472 }
473 }
474 /* QoS info may be cleared by previous un-assoc RXON */
475 iwlagn_update_qos(priv, ctx);
476
477 /*
478 * We'll run into this code path when beaconing is
479 * enabled, but then we also need to send the beacon
480 * to the device.
481 */
482 if (ctx->vif && (ctx->vif->type == NL80211_IFTYPE_AP)) {
483 ret = iwlagn_update_beacon(priv, ctx->vif);
484 if (ret) {
485 IWL_ERR(priv,
486 "Error sending required beacon (%d)!\n",
487 ret);
488 return ret;
489 }
490 }
491
492 priv->start_calib = 0;
493 /*
494 * Apply the new configuration.
495 *
496 * Associated RXON doesn't clear the station table in uCode,
497 * so we don't need to restore stations etc. after this.
498 */
499 ret = iwl_dvm_send_cmd_pdu(priv, ctx->rxon_cmd, 0,
500 sizeof(struct iwl_rxon_cmd), &ctx->staging);
501 if (ret) {
502 IWL_ERR(priv, "Error setting new RXON (%d)\n", ret);
503 return ret;
504 }
505 memcpy(active, &ctx->staging, sizeof(*active));
506
507 /* IBSS beacon needs to be sent after setting assoc */
508 if (ctx->vif && (ctx->vif->type == NL80211_IFTYPE_ADHOC))
509 if (iwlagn_update_beacon(priv, ctx->vif))
510 IWL_ERR(priv, "Error sending IBSS beacon\n");
511 iwl_init_sensitivity(priv);
512
513 /*
514 * If we issue a new RXON command which required a tune then
515 * we must send a new TXPOWER command or we won't be able to
516 * Tx any frames.
517 *
518 * It's expected we set power here if channel is changing.
519 */
520 ret = iwl_set_tx_power(priv, priv->tx_power_next, true);
521 if (ret) {
522 IWL_ERR(priv, "Error sending TX power (%d)\n", ret);
523 return ret;
524 }
525
526 if (ctx->vif && ctx->vif->type == NL80211_IFTYPE_STATION &&
527 priv->cfg->ht_params && priv->cfg->ht_params->smps_mode)
528 ieee80211_request_smps(ctx->vif,
529 priv->cfg->ht_params->smps_mode);
530
531 return 0;
532 }
533
534 int iwlagn_set_pan_params(struct iwl_priv *priv)
535 {
536 struct iwl_wipan_params_cmd cmd;
537 struct iwl_rxon_context *ctx_bss, *ctx_pan;
538 int slot0 = 300, slot1 = 0;
539 int ret;
540
541 if (priv->valid_contexts == BIT(IWL_RXON_CTX_BSS))
542 return 0;
543
544 BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
545
546 lockdep_assert_held(&priv->mutex);
547
548 ctx_bss = &priv->contexts[IWL_RXON_CTX_BSS];
549 ctx_pan = &priv->contexts[IWL_RXON_CTX_PAN];
550
551 /*
552 * If the PAN context is inactive, then we don't need
553 * to update the PAN parameters, the last thing we'll
554 * have done before it goes inactive is making the PAN
555 * parameters be WLAN-only.
556 */
557 if (!ctx_pan->is_active)
558 return 0;
559
560 memset(&cmd, 0, sizeof(cmd));
561
562 /* only 2 slots are currently allowed */
563 cmd.num_slots = 2;
564
565 cmd.slots[0].type = 0; /* BSS */
566 cmd.slots[1].type = 1; /* PAN */
567
568 if (ctx_bss->vif && ctx_pan->vif) {
569 int bcnint = ctx_pan->beacon_int;
570 int dtim = ctx_pan->vif->bss_conf.dtim_period ?: 1;
571
572 /* should be set, but seems unused?? */
573 cmd.flags |= cpu_to_le16(IWL_WIPAN_PARAMS_FLG_SLOTTED_MODE);
574
575 if (ctx_pan->vif->type == NL80211_IFTYPE_AP &&
576 bcnint &&
577 bcnint != ctx_bss->beacon_int) {
578 IWL_ERR(priv,
579 "beacon intervals don't match (%d, %d)\n",
580 ctx_bss->beacon_int, ctx_pan->beacon_int);
581 } else
582 bcnint = max_t(int, bcnint,
583 ctx_bss->beacon_int);
584 if (!bcnint)
585 bcnint = DEFAULT_BEACON_INTERVAL;
586 slot0 = bcnint / 2;
587 slot1 = bcnint - slot0;
588
589 if (test_bit(STATUS_SCAN_HW, &priv->status) ||
590 (!ctx_bss->vif->bss_conf.idle &&
591 !ctx_bss->vif->bss_conf.assoc)) {
592 slot0 = dtim * bcnint * 3 - IWL_MIN_SLOT_TIME;
593 slot1 = IWL_MIN_SLOT_TIME;
594 } else if (!ctx_pan->vif->bss_conf.idle &&
595 !ctx_pan->vif->bss_conf.assoc) {
596 slot1 = dtim * bcnint * 3 - IWL_MIN_SLOT_TIME;
597 slot0 = IWL_MIN_SLOT_TIME;
598 }
599 } else if (ctx_pan->vif) {
600 slot0 = 0;
601 slot1 = max_t(int, 1, ctx_pan->vif->bss_conf.dtim_period) *
602 ctx_pan->beacon_int;
603 slot1 = max_t(int, DEFAULT_BEACON_INTERVAL, slot1);
604
605 if (test_bit(STATUS_SCAN_HW, &priv->status)) {
606 slot0 = slot1 * 3 - IWL_MIN_SLOT_TIME;
607 slot1 = IWL_MIN_SLOT_TIME;
608 }
609 }
610
611 cmd.slots[0].width = cpu_to_le16(slot0);
612 cmd.slots[1].width = cpu_to_le16(slot1);
613
614 ret = iwl_dvm_send_cmd_pdu(priv, REPLY_WIPAN_PARAMS, 0,
615 sizeof(cmd), &cmd);
616 if (ret)
617 IWL_ERR(priv, "Error setting PAN parameters (%d)\n", ret);
618
619 return ret;
620 }
621
622 static void _iwl_set_rxon_ht(struct iwl_priv *priv,
623 struct iwl_ht_config *ht_conf,
624 struct iwl_rxon_context *ctx)
625 {
626 struct iwl_rxon_cmd *rxon = &ctx->staging;
627
628 if (!ctx->ht.enabled) {
629 rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |
630 RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK |
631 RXON_FLG_HT40_PROT_MSK |
632 RXON_FLG_HT_PROT_MSK);
633 return;
634 }
635
636 /* FIXME: if the definition of ht.protection changed, the "translation"
637 * will be needed for rxon->flags
638 */
639 rxon->flags |= cpu_to_le32(ctx->ht.protection <<
640 RXON_FLG_HT_OPERATING_MODE_POS);
641
642 /* Set up channel bandwidth:
643 * 20 MHz only, 20/40 mixed or pure 40 if ht40 ok */
644 /* clear the HT channel mode before set the mode */
645 rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |
646 RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
647 if (iwl_is_ht40_tx_allowed(priv, ctx, NULL)) {
648 /* pure ht40 */
649 if (ctx->ht.protection ==
650 IEEE80211_HT_OP_MODE_PROTECTION_20MHZ) {
651 rxon->flags |= RXON_FLG_CHANNEL_MODE_PURE_40;
652 /*
653 * Note: control channel is opposite of extension
654 * channel
655 */
656 switch (ctx->ht.extension_chan_offset) {
657 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
658 rxon->flags &=
659 ~RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
660 break;
661 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
662 rxon->flags |=
663 RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
664 break;
665 }
666 } else {
667 /*
668 * Note: control channel is opposite of extension
669 * channel
670 */
671 switch (ctx->ht.extension_chan_offset) {
672 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
673 rxon->flags &=
674 ~(RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
675 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
676 break;
677 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
678 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
679 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
680 break;
681 case IEEE80211_HT_PARAM_CHA_SEC_NONE:
682 default:
683 /*
684 * channel location only valid if in Mixed
685 * mode
686 */
687 IWL_ERR(priv,
688 "invalid extension channel offset\n");
689 break;
690 }
691 }
692 } else {
693 rxon->flags |= RXON_FLG_CHANNEL_MODE_LEGACY;
694 }
695
696 iwlagn_set_rxon_chain(priv, ctx);
697
698 IWL_DEBUG_ASSOC(priv, "rxon flags 0x%X operation mode :0x%X "
699 "extension channel offset 0x%x\n",
700 le32_to_cpu(rxon->flags), ctx->ht.protection,
701 ctx->ht.extension_chan_offset);
702 }
703
704 void iwl_set_rxon_ht(struct iwl_priv *priv, struct iwl_ht_config *ht_conf)
705 {
706 struct iwl_rxon_context *ctx;
707
708 for_each_context(priv, ctx)
709 _iwl_set_rxon_ht(priv, ht_conf, ctx);
710 }
711
712 /**
713 * iwl_set_rxon_channel - Set the band and channel values in staging RXON
714 * @ch: requested channel as a pointer to struct ieee80211_channel
715
716 * NOTE: Does not commit to the hardware; it sets appropriate bit fields
717 * in the staging RXON flag structure based on the ch->band
718 */
719 void iwl_set_rxon_channel(struct iwl_priv *priv, struct ieee80211_channel *ch,
720 struct iwl_rxon_context *ctx)
721 {
722 enum ieee80211_band band = ch->band;
723 u16 channel = ch->hw_value;
724
725 if ((le16_to_cpu(ctx->staging.channel) == channel) &&
726 (priv->band == band))
727 return;
728
729 ctx->staging.channel = cpu_to_le16(channel);
730 if (band == IEEE80211_BAND_5GHZ)
731 ctx->staging.flags &= ~RXON_FLG_BAND_24G_MSK;
732 else
733 ctx->staging.flags |= RXON_FLG_BAND_24G_MSK;
734
735 priv->band = band;
736
737 IWL_DEBUG_INFO(priv, "Staging channel set to %d [%d]\n", channel, band);
738
739 }
740
741 void iwl_set_flags_for_band(struct iwl_priv *priv,
742 struct iwl_rxon_context *ctx,
743 enum ieee80211_band band,
744 struct ieee80211_vif *vif)
745 {
746 if (band == IEEE80211_BAND_5GHZ) {
747 ctx->staging.flags &=
748 ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK
749 | RXON_FLG_CCK_MSK);
750 ctx->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
751 } else {
752 /* Copied from iwl_post_associate() */
753 if (vif && vif->bss_conf.use_short_slot)
754 ctx->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
755 else
756 ctx->staging.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
757
758 ctx->staging.flags |= RXON_FLG_BAND_24G_MSK;
759 ctx->staging.flags |= RXON_FLG_AUTO_DETECT_MSK;
760 ctx->staging.flags &= ~RXON_FLG_CCK_MSK;
761 }
762 }
763
764 static void iwl_set_rxon_hwcrypto(struct iwl_priv *priv,
765 struct iwl_rxon_context *ctx, int hw_decrypt)
766 {
767 struct iwl_rxon_cmd *rxon = &ctx->staging;
768
769 if (hw_decrypt)
770 rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
771 else
772 rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;
773
774 }
775
776 /* validate RXON structure is valid */
777 static int iwl_check_rxon_cmd(struct iwl_priv *priv,
778 struct iwl_rxon_context *ctx)
779 {
780 struct iwl_rxon_cmd *rxon = &ctx->staging;
781 u32 errors = 0;
782
783 if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
784 if (rxon->flags & RXON_FLG_TGJ_NARROW_BAND_MSK) {
785 IWL_WARN(priv, "check 2.4G: wrong narrow\n");
786 errors |= BIT(0);
787 }
788 if (rxon->flags & RXON_FLG_RADAR_DETECT_MSK) {
789 IWL_WARN(priv, "check 2.4G: wrong radar\n");
790 errors |= BIT(1);
791 }
792 } else {
793 if (!(rxon->flags & RXON_FLG_SHORT_SLOT_MSK)) {
794 IWL_WARN(priv, "check 5.2G: not short slot!\n");
795 errors |= BIT(2);
796 }
797 if (rxon->flags & RXON_FLG_CCK_MSK) {
798 IWL_WARN(priv, "check 5.2G: CCK!\n");
799 errors |= BIT(3);
800 }
801 }
802 if ((rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1) {
803 IWL_WARN(priv, "mac/bssid mcast!\n");
804 errors |= BIT(4);
805 }
806
807 /* make sure basic rates 6Mbps and 1Mbps are supported */
808 if ((rxon->ofdm_basic_rates & IWL_RATE_6M_MASK) == 0 &&
809 (rxon->cck_basic_rates & IWL_RATE_1M_MASK) == 0) {
810 IWL_WARN(priv, "neither 1 nor 6 are basic\n");
811 errors |= BIT(5);
812 }
813
814 if (le16_to_cpu(rxon->assoc_id) > 2007) {
815 IWL_WARN(priv, "aid > 2007\n");
816 errors |= BIT(6);
817 }
818
819 if ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK))
820 == (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK)) {
821 IWL_WARN(priv, "CCK and short slot\n");
822 errors |= BIT(7);
823 }
824
825 if ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK))
826 == (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK)) {
827 IWL_WARN(priv, "CCK and auto detect\n");
828 errors |= BIT(8);
829 }
830
831 if ((rxon->flags & (RXON_FLG_AUTO_DETECT_MSK |
832 RXON_FLG_TGG_PROTECT_MSK)) ==
833 RXON_FLG_TGG_PROTECT_MSK) {
834 IWL_WARN(priv, "TGg but no auto-detect\n");
835 errors |= BIT(9);
836 }
837
838 if (rxon->channel == 0) {
839 IWL_WARN(priv, "zero channel is invalid\n");
840 errors |= BIT(10);
841 }
842
843 WARN(errors, "Invalid RXON (%#x), channel %d",
844 errors, le16_to_cpu(rxon->channel));
845
846 return errors ? -EINVAL : 0;
847 }
848
849 /**
850 * iwl_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed
851 * @priv: staging_rxon is compared to active_rxon
852 *
853 * If the RXON structure is changing enough to require a new tune,
854 * or is clearing the RXON_FILTER_ASSOC_MSK, then return 1 to indicate that
855 * a new tune (full RXON command, rather than RXON_ASSOC cmd) is required.
856 */
857 static int iwl_full_rxon_required(struct iwl_priv *priv,
858 struct iwl_rxon_context *ctx)
859 {
860 const struct iwl_rxon_cmd *staging = &ctx->staging;
861 const struct iwl_rxon_cmd *active = &ctx->active;
862
863 #define CHK(cond) \
864 if ((cond)) { \
865 IWL_DEBUG_INFO(priv, "need full RXON - " #cond "\n"); \
866 return 1; \
867 }
868
869 #define CHK_NEQ(c1, c2) \
870 if ((c1) != (c2)) { \
871 IWL_DEBUG_INFO(priv, "need full RXON - " \
872 #c1 " != " #c2 " - %d != %d\n", \
873 (c1), (c2)); \
874 return 1; \
875 }
876
877 /* These items are only settable from the full RXON command */
878 CHK(!iwl_is_associated_ctx(ctx));
879 CHK(!ether_addr_equal(staging->bssid_addr, active->bssid_addr));
880 CHK(!ether_addr_equal(staging->node_addr, active->node_addr));
881 CHK(!ether_addr_equal(staging->wlap_bssid_addr,
882 active->wlap_bssid_addr));
883 CHK_NEQ(staging->dev_type, active->dev_type);
884 CHK_NEQ(staging->channel, active->channel);
885 CHK_NEQ(staging->air_propagation, active->air_propagation);
886 CHK_NEQ(staging->ofdm_ht_single_stream_basic_rates,
887 active->ofdm_ht_single_stream_basic_rates);
888 CHK_NEQ(staging->ofdm_ht_dual_stream_basic_rates,
889 active->ofdm_ht_dual_stream_basic_rates);
890 CHK_NEQ(staging->ofdm_ht_triple_stream_basic_rates,
891 active->ofdm_ht_triple_stream_basic_rates);
892 CHK_NEQ(staging->assoc_id, active->assoc_id);
893
894 /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
895 * be updated with the RXON_ASSOC command -- however only some
896 * flag transitions are allowed using RXON_ASSOC */
897
898 /* Check if we are not switching bands */
899 CHK_NEQ(staging->flags & RXON_FLG_BAND_24G_MSK,
900 active->flags & RXON_FLG_BAND_24G_MSK);
901
902 /* Check if we are switching association toggle */
903 CHK_NEQ(staging->filter_flags & RXON_FILTER_ASSOC_MSK,
904 active->filter_flags & RXON_FILTER_ASSOC_MSK);
905
906 #undef CHK
907 #undef CHK_NEQ
908
909 return 0;
910 }
911
912 #ifdef CONFIG_IWLWIFI_DEBUG
913 void iwl_print_rx_config_cmd(struct iwl_priv *priv,
914 enum iwl_rxon_context_id ctxid)
915 {
916 struct iwl_rxon_context *ctx = &priv->contexts[ctxid];
917 struct iwl_rxon_cmd *rxon = &ctx->staging;
918
919 IWL_DEBUG_RADIO(priv, "RX CONFIG:\n");
920 iwl_print_hex_dump(priv, IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
921 IWL_DEBUG_RADIO(priv, "u16 channel: 0x%x\n",
922 le16_to_cpu(rxon->channel));
923 IWL_DEBUG_RADIO(priv, "u32 flags: 0x%08X\n",
924 le32_to_cpu(rxon->flags));
925 IWL_DEBUG_RADIO(priv, "u32 filter_flags: 0x%08x\n",
926 le32_to_cpu(rxon->filter_flags));
927 IWL_DEBUG_RADIO(priv, "u8 dev_type: 0x%x\n", rxon->dev_type);
928 IWL_DEBUG_RADIO(priv, "u8 ofdm_basic_rates: 0x%02x\n",
929 rxon->ofdm_basic_rates);
930 IWL_DEBUG_RADIO(priv, "u8 cck_basic_rates: 0x%02x\n",
931 rxon->cck_basic_rates);
932 IWL_DEBUG_RADIO(priv, "u8[6] node_addr: %pM\n", rxon->node_addr);
933 IWL_DEBUG_RADIO(priv, "u8[6] bssid_addr: %pM\n", rxon->bssid_addr);
934 IWL_DEBUG_RADIO(priv, "u16 assoc_id: 0x%x\n",
935 le16_to_cpu(rxon->assoc_id));
936 }
937 #endif
938
939 static void iwl_calc_basic_rates(struct iwl_priv *priv,
940 struct iwl_rxon_context *ctx)
941 {
942 int lowest_present_ofdm = 100;
943 int lowest_present_cck = 100;
944 u8 cck = 0;
945 u8 ofdm = 0;
946
947 if (ctx->vif) {
948 struct ieee80211_supported_band *sband;
949 unsigned long basic = ctx->vif->bss_conf.basic_rates;
950 int i;
951
952 sband = priv->hw->wiphy->bands[priv->hw->conf.chandef.chan->band];
953
954 for_each_set_bit(i, &basic, BITS_PER_LONG) {
955 int hw = sband->bitrates[i].hw_value;
956 if (hw >= IWL_FIRST_OFDM_RATE) {
957 ofdm |= BIT(hw - IWL_FIRST_OFDM_RATE);
958 if (lowest_present_ofdm > hw)
959 lowest_present_ofdm = hw;
960 } else {
961 BUILD_BUG_ON(IWL_FIRST_CCK_RATE != 0);
962
963 cck |= BIT(hw);
964 if (lowest_present_cck > hw)
965 lowest_present_cck = hw;
966 }
967 }
968 }
969
970 /*
971 * Now we've got the basic rates as bitmaps in the ofdm and cck
972 * variables. This isn't sufficient though, as there might not
973 * be all the right rates in the bitmap. E.g. if the only basic
974 * rates are 5.5 Mbps and 11 Mbps, we still need to add 1 Mbps
975 * and 6 Mbps because the 802.11-2007 standard says in 9.6:
976 *
977 * [...] a STA responding to a received frame shall transmit
978 * its Control Response frame [...] at the highest rate in the
979 * BSSBasicRateSet parameter that is less than or equal to the
980 * rate of the immediately previous frame in the frame exchange
981 * sequence ([...]) and that is of the same modulation class
982 * ([...]) as the received frame. If no rate contained in the
983 * BSSBasicRateSet parameter meets these conditions, then the
984 * control frame sent in response to a received frame shall be
985 * transmitted at the highest mandatory rate of the PHY that is
986 * less than or equal to the rate of the received frame, and
987 * that is of the same modulation class as the received frame.
988 *
989 * As a consequence, we need to add all mandatory rates that are
990 * lower than all of the basic rates to these bitmaps.
991 */
992
993 if (IWL_RATE_24M_INDEX < lowest_present_ofdm)
994 ofdm |= IWL_RATE_24M_MASK >> IWL_FIRST_OFDM_RATE;
995 if (IWL_RATE_12M_INDEX < lowest_present_ofdm)
996 ofdm |= IWL_RATE_12M_MASK >> IWL_FIRST_OFDM_RATE;
997 /* 6M already there or needed so always add */
998 ofdm |= IWL_RATE_6M_MASK >> IWL_FIRST_OFDM_RATE;
999
1000 /*
1001 * CCK is a bit more complex with DSSS vs. HR/DSSS vs. ERP.
1002 * Note, however:
1003 * - if no CCK rates are basic, it must be ERP since there must
1004 * be some basic rates at all, so they're OFDM => ERP PHY
1005 * (or we're in 5 GHz, and the cck bitmap will never be used)
1006 * - if 11M is a basic rate, it must be ERP as well, so add 5.5M
1007 * - if 5.5M is basic, 1M and 2M are mandatory
1008 * - if 2M is basic, 1M is mandatory
1009 * - if 1M is basic, that's the only valid ACK rate.
1010 * As a consequence, it's not as complicated as it sounds, just add
1011 * any lower rates to the ACK rate bitmap.
1012 */
1013 if (IWL_RATE_11M_INDEX < lowest_present_cck)
1014 cck |= IWL_RATE_11M_MASK >> IWL_FIRST_CCK_RATE;
1015 if (IWL_RATE_5M_INDEX < lowest_present_cck)
1016 cck |= IWL_RATE_5M_MASK >> IWL_FIRST_CCK_RATE;
1017 if (IWL_RATE_2M_INDEX < lowest_present_cck)
1018 cck |= IWL_RATE_2M_MASK >> IWL_FIRST_CCK_RATE;
1019 /* 1M already there or needed so always add */
1020 cck |= IWL_RATE_1M_MASK >> IWL_FIRST_CCK_RATE;
1021
1022 IWL_DEBUG_RATE(priv, "Set basic rates cck:0x%.2x ofdm:0x%.2x\n",
1023 cck, ofdm);
1024
1025 /* "basic_rates" is a misnomer here -- should be called ACK rates */
1026 ctx->staging.cck_basic_rates = cck;
1027 ctx->staging.ofdm_basic_rates = ofdm;
1028 }
1029
1030 /**
1031 * iwlagn_commit_rxon - commit staging_rxon to hardware
1032 *
1033 * The RXON command in staging_rxon is committed to the hardware and
1034 * the active_rxon structure is updated with the new data. This
1035 * function correctly transitions out of the RXON_ASSOC_MSK state if
1036 * a HW tune is required based on the RXON structure changes.
1037 *
1038 * The connect/disconnect flow should be as the following:
1039 *
1040 * 1. make sure send RXON command with association bit unset if not connect
1041 * this should include the channel and the band for the candidate
1042 * to be connected to
1043 * 2. Add Station before RXON association with the AP
1044 * 3. RXON_timing has to send before RXON for connection
1045 * 4. full RXON command - associated bit set
1046 * 5. use RXON_ASSOC command to update any flags changes
1047 */
1048 int iwlagn_commit_rxon(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
1049 {
1050 /* cast away the const for active_rxon in this function */
1051 struct iwl_rxon_cmd *active = (void *)&ctx->active;
1052 bool new_assoc = !!(ctx->staging.filter_flags & RXON_FILTER_ASSOC_MSK);
1053 int ret;
1054
1055 lockdep_assert_held(&priv->mutex);
1056
1057 if (!iwl_is_alive(priv))
1058 return -EBUSY;
1059
1060 /* This function hardcodes a bunch of dual-mode assumptions */
1061 BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
1062
1063 if (!ctx->is_active)
1064 return 0;
1065
1066 /* always get timestamp with Rx frame */
1067 ctx->staging.flags |= RXON_FLG_TSF2HOST_MSK;
1068
1069 /* recalculate basic rates */
1070 iwl_calc_basic_rates(priv, ctx);
1071
1072 /*
1073 * force CTS-to-self frames protection if RTS-CTS is not preferred
1074 * one aggregation protection method
1075 */
1076 if (!priv->hw_params.use_rts_for_aggregation)
1077 ctx->staging.flags |= RXON_FLG_SELF_CTS_EN;
1078
1079 if ((ctx->vif && ctx->vif->bss_conf.use_short_slot) ||
1080 !(ctx->staging.flags & RXON_FLG_BAND_24G_MSK))
1081 ctx->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
1082 else
1083 ctx->staging.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
1084
1085 iwl_print_rx_config_cmd(priv, ctx->ctxid);
1086 ret = iwl_check_rxon_cmd(priv, ctx);
1087 if (ret) {
1088 IWL_ERR(priv, "Invalid RXON configuration. Not committing.\n");
1089 return -EINVAL;
1090 }
1091
1092 /*
1093 * receive commit_rxon request
1094 * abort any previous channel switch if still in process
1095 */
1096 if (test_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status) &&
1097 (priv->switch_channel != ctx->staging.channel)) {
1098 IWL_DEBUG_11H(priv, "abort channel switch on %d\n",
1099 le16_to_cpu(priv->switch_channel));
1100 iwl_chswitch_done(priv, false);
1101 }
1102
1103 /*
1104 * If we don't need to send a full RXON, we can use
1105 * iwl_rxon_assoc_cmd which is used to reconfigure filter
1106 * and other flags for the current radio configuration.
1107 */
1108 if (!iwl_full_rxon_required(priv, ctx)) {
1109 ret = iwlagn_send_rxon_assoc(priv, ctx);
1110 if (ret) {
1111 IWL_ERR(priv, "Error setting RXON_ASSOC (%d)\n", ret);
1112 return ret;
1113 }
1114
1115 memcpy(active, &ctx->staging, sizeof(*active));
1116 /*
1117 * We do not commit tx power settings while channel changing,
1118 * do it now if after settings changed.
1119 */
1120 iwl_set_tx_power(priv, priv->tx_power_next, false);
1121
1122 /* make sure we are in the right PS state */
1123 iwl_power_update_mode(priv, true);
1124
1125 return 0;
1126 }
1127
1128 iwl_set_rxon_hwcrypto(priv, ctx, !iwlwifi_mod_params.sw_crypto);
1129
1130 IWL_DEBUG_INFO(priv,
1131 "Going to commit RXON\n"
1132 " * with%s RXON_FILTER_ASSOC_MSK\n"
1133 " * channel = %d\n"
1134 " * bssid = %pM\n",
1135 (new_assoc ? "" : "out"),
1136 le16_to_cpu(ctx->staging.channel),
1137 ctx->staging.bssid_addr);
1138
1139 /*
1140 * Always clear associated first, but with the correct config.
1141 * This is required as for example station addition for the
1142 * AP station must be done after the BSSID is set to correctly
1143 * set up filters in the device.
1144 */
1145 ret = iwlagn_rxon_disconn(priv, ctx);
1146 if (ret)
1147 return ret;
1148
1149 ret = iwlagn_set_pan_params(priv);
1150 if (ret)
1151 return ret;
1152
1153 if (new_assoc)
1154 return iwlagn_rxon_connect(priv, ctx);
1155
1156 return 0;
1157 }
1158
1159 void iwlagn_config_ht40(struct ieee80211_conf *conf,
1160 struct iwl_rxon_context *ctx)
1161 {
1162 if (conf_is_ht40_minus(conf)) {
1163 ctx->ht.extension_chan_offset =
1164 IEEE80211_HT_PARAM_CHA_SEC_BELOW;
1165 ctx->ht.is_40mhz = true;
1166 } else if (conf_is_ht40_plus(conf)) {
1167 ctx->ht.extension_chan_offset =
1168 IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
1169 ctx->ht.is_40mhz = true;
1170 } else {
1171 ctx->ht.extension_chan_offset =
1172 IEEE80211_HT_PARAM_CHA_SEC_NONE;
1173 ctx->ht.is_40mhz = false;
1174 }
1175 }
1176
1177 int iwlagn_mac_config(struct ieee80211_hw *hw, u32 changed)
1178 {
1179 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1180 struct iwl_rxon_context *ctx;
1181 struct ieee80211_conf *conf = &hw->conf;
1182 struct ieee80211_channel *channel = conf->chandef.chan;
1183 int ret = 0;
1184
1185 IWL_DEBUG_MAC80211(priv, "enter: changed %#x\n", changed);
1186
1187 mutex_lock(&priv->mutex);
1188
1189 if (unlikely(test_bit(STATUS_SCANNING, &priv->status))) {
1190 IWL_DEBUG_MAC80211(priv, "leave - scanning\n");
1191 goto out;
1192 }
1193
1194 if (!iwl_is_ready(priv)) {
1195 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
1196 goto out;
1197 }
1198
1199 if (changed & (IEEE80211_CONF_CHANGE_SMPS |
1200 IEEE80211_CONF_CHANGE_CHANNEL)) {
1201 /* mac80211 uses static for non-HT which is what we want */
1202 priv->current_ht_config.smps = conf->smps_mode;
1203
1204 /*
1205 * Recalculate chain counts.
1206 *
1207 * If monitor mode is enabled then mac80211 will
1208 * set up the SM PS mode to OFF if an HT channel is
1209 * configured.
1210 */
1211 for_each_context(priv, ctx)
1212 iwlagn_set_rxon_chain(priv, ctx);
1213 }
1214
1215 if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
1216 for_each_context(priv, ctx) {
1217 /* Configure HT40 channels */
1218 if (ctx->ht.enabled != conf_is_ht(conf))
1219 ctx->ht.enabled = conf_is_ht(conf);
1220
1221 if (ctx->ht.enabled) {
1222 /* if HT40 is used, it should not change
1223 * after associated except channel switch */
1224 if (!ctx->ht.is_40mhz ||
1225 !iwl_is_associated_ctx(ctx))
1226 iwlagn_config_ht40(conf, ctx);
1227 } else
1228 ctx->ht.is_40mhz = false;
1229
1230 /*
1231 * Default to no protection. Protection mode will
1232 * later be set from BSS config in iwl_ht_conf
1233 */
1234 ctx->ht.protection = IEEE80211_HT_OP_MODE_PROTECTION_NONE;
1235
1236 /* if we are switching from ht to 2.4 clear flags
1237 * from any ht related info since 2.4 does not
1238 * support ht */
1239 if (le16_to_cpu(ctx->staging.channel) !=
1240 channel->hw_value)
1241 ctx->staging.flags = 0;
1242
1243 iwl_set_rxon_channel(priv, channel, ctx);
1244 iwl_set_rxon_ht(priv, &priv->current_ht_config);
1245
1246 iwl_set_flags_for_band(priv, ctx, channel->band,
1247 ctx->vif);
1248 }
1249
1250 iwl_update_bcast_stations(priv);
1251 }
1252
1253 if (changed & (IEEE80211_CONF_CHANGE_PS |
1254 IEEE80211_CONF_CHANGE_IDLE)) {
1255 ret = iwl_power_update_mode(priv, false);
1256 if (ret)
1257 IWL_DEBUG_MAC80211(priv, "Error setting sleep level\n");
1258 }
1259
1260 if (changed & IEEE80211_CONF_CHANGE_POWER) {
1261 IWL_DEBUG_MAC80211(priv, "TX Power old=%d new=%d\n",
1262 priv->tx_power_user_lmt, conf->power_level);
1263
1264 iwl_set_tx_power(priv, conf->power_level, false);
1265 }
1266
1267 for_each_context(priv, ctx) {
1268 if (!memcmp(&ctx->staging, &ctx->active, sizeof(ctx->staging)))
1269 continue;
1270 iwlagn_commit_rxon(priv, ctx);
1271 }
1272 out:
1273 mutex_unlock(&priv->mutex);
1274 IWL_DEBUG_MAC80211(priv, "leave\n");
1275
1276 return ret;
1277 }
1278
1279 static void iwlagn_check_needed_chains(struct iwl_priv *priv,
1280 struct iwl_rxon_context *ctx,
1281 struct ieee80211_bss_conf *bss_conf)
1282 {
1283 struct ieee80211_vif *vif = ctx->vif;
1284 struct iwl_rxon_context *tmp;
1285 struct ieee80211_sta *sta;
1286 struct iwl_ht_config *ht_conf = &priv->current_ht_config;
1287 struct ieee80211_sta_ht_cap *ht_cap;
1288 bool need_multiple;
1289
1290 lockdep_assert_held(&priv->mutex);
1291
1292 switch (vif->type) {
1293 case NL80211_IFTYPE_STATION:
1294 rcu_read_lock();
1295 sta = ieee80211_find_sta(vif, bss_conf->bssid);
1296 if (!sta) {
1297 /*
1298 * If at all, this can only happen through a race
1299 * when the AP disconnects us while we're still
1300 * setting up the connection, in that case mac80211
1301 * will soon tell us about that.
1302 */
1303 need_multiple = false;
1304 rcu_read_unlock();
1305 break;
1306 }
1307
1308 ht_cap = &sta->ht_cap;
1309
1310 need_multiple = true;
1311
1312 /*
1313 * If the peer advertises no support for receiving 2 and 3
1314 * stream MCS rates, it can't be transmitting them either.
1315 */
1316 if (ht_cap->mcs.rx_mask[1] == 0 &&
1317 ht_cap->mcs.rx_mask[2] == 0) {
1318 need_multiple = false;
1319 } else if (!(ht_cap->mcs.tx_params &
1320 IEEE80211_HT_MCS_TX_DEFINED)) {
1321 /* If it can't TX MCS at all ... */
1322 need_multiple = false;
1323 } else if (ht_cap->mcs.tx_params &
1324 IEEE80211_HT_MCS_TX_RX_DIFF) {
1325 int maxstreams;
1326
1327 /*
1328 * But if it can receive them, it might still not
1329 * be able to transmit them, which is what we need
1330 * to check here -- so check the number of streams
1331 * it advertises for TX (if different from RX).
1332 */
1333
1334 maxstreams = (ht_cap->mcs.tx_params &
1335 IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK);
1336 maxstreams >>=
1337 IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT;
1338 maxstreams += 1;
1339
1340 if (maxstreams <= 1)
1341 need_multiple = false;
1342 }
1343
1344 rcu_read_unlock();
1345 break;
1346 case NL80211_IFTYPE_ADHOC:
1347 /* currently */
1348 need_multiple = false;
1349 break;
1350 default:
1351 /* only AP really */
1352 need_multiple = true;
1353 break;
1354 }
1355
1356 ctx->ht_need_multiple_chains = need_multiple;
1357
1358 if (!need_multiple) {
1359 /* check all contexts */
1360 for_each_context(priv, tmp) {
1361 if (!tmp->vif)
1362 continue;
1363 if (tmp->ht_need_multiple_chains) {
1364 need_multiple = true;
1365 break;
1366 }
1367 }
1368 }
1369
1370 ht_conf->single_chain_sufficient = !need_multiple;
1371 }
1372
1373 static void iwlagn_chain_noise_reset(struct iwl_priv *priv)
1374 {
1375 struct iwl_chain_noise_data *data = &priv->chain_noise_data;
1376 int ret;
1377
1378 if (priv->calib_disabled & IWL_CHAIN_NOISE_CALIB_DISABLED)
1379 return;
1380
1381 if ((data->state == IWL_CHAIN_NOISE_ALIVE) &&
1382 iwl_is_any_associated(priv)) {
1383 struct iwl_calib_chain_noise_reset_cmd cmd;
1384
1385 /* clear data for chain noise calibration algorithm */
1386 data->chain_noise_a = 0;
1387 data->chain_noise_b = 0;
1388 data->chain_noise_c = 0;
1389 data->chain_signal_a = 0;
1390 data->chain_signal_b = 0;
1391 data->chain_signal_c = 0;
1392 data->beacon_count = 0;
1393
1394 memset(&cmd, 0, sizeof(cmd));
1395 iwl_set_calib_hdr(&cmd.hdr,
1396 priv->phy_calib_chain_noise_reset_cmd);
1397 ret = iwl_dvm_send_cmd_pdu(priv,
1398 REPLY_PHY_CALIBRATION_CMD,
1399 0, sizeof(cmd), &cmd);
1400 if (ret)
1401 IWL_ERR(priv,
1402 "Could not send REPLY_PHY_CALIBRATION_CMD\n");
1403 data->state = IWL_CHAIN_NOISE_ACCUMULATE;
1404 IWL_DEBUG_CALIB(priv, "Run chain_noise_calibrate\n");
1405 }
1406 }
1407
1408 void iwlagn_bss_info_changed(struct ieee80211_hw *hw,
1409 struct ieee80211_vif *vif,
1410 struct ieee80211_bss_conf *bss_conf,
1411 u32 changes)
1412 {
1413 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1414 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1415 int ret;
1416 bool force = false;
1417
1418 mutex_lock(&priv->mutex);
1419
1420 if (changes & BSS_CHANGED_IDLE && bss_conf->idle) {
1421 /*
1422 * If we go idle, then clearly no "passive-no-rx"
1423 * workaround is needed any more, this is a reset.
1424 */
1425 iwlagn_lift_passive_no_rx(priv);
1426 }
1427
1428 if (unlikely(!iwl_is_ready(priv))) {
1429 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
1430 mutex_unlock(&priv->mutex);
1431 return;
1432 }
1433
1434 if (unlikely(!ctx->vif)) {
1435 IWL_DEBUG_MAC80211(priv, "leave - vif is NULL\n");
1436 mutex_unlock(&priv->mutex);
1437 return;
1438 }
1439
1440 if (changes & BSS_CHANGED_BEACON_INT)
1441 force = true;
1442
1443 if (changes & BSS_CHANGED_QOS) {
1444 ctx->qos_data.qos_active = bss_conf->qos;
1445 iwlagn_update_qos(priv, ctx);
1446 }
1447
1448 ctx->staging.assoc_id = cpu_to_le16(vif->bss_conf.aid);
1449 if (vif->bss_conf.use_short_preamble)
1450 ctx->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
1451 else
1452 ctx->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
1453
1454 if (changes & BSS_CHANGED_ASSOC) {
1455 if (bss_conf->assoc) {
1456 priv->timestamp = bss_conf->sync_tsf;
1457 ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
1458 } else {
1459 ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
1460
1461 if (ctx->ctxid == IWL_RXON_CTX_BSS)
1462 priv->have_rekey_data = false;
1463 }
1464
1465 iwlagn_bt_coex_rssi_monitor(priv);
1466 }
1467
1468 if (ctx->ht.enabled) {
1469 ctx->ht.protection = bss_conf->ht_operation_mode &
1470 IEEE80211_HT_OP_MODE_PROTECTION;
1471 ctx->ht.non_gf_sta_present = !!(bss_conf->ht_operation_mode &
1472 IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT);
1473 iwlagn_check_needed_chains(priv, ctx, bss_conf);
1474 iwl_set_rxon_ht(priv, &priv->current_ht_config);
1475 }
1476
1477 iwlagn_set_rxon_chain(priv, ctx);
1478
1479 if (bss_conf->use_cts_prot && (priv->band != IEEE80211_BAND_5GHZ))
1480 ctx->staging.flags |= RXON_FLG_TGG_PROTECT_MSK;
1481 else
1482 ctx->staging.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
1483
1484 if (bss_conf->use_cts_prot)
1485 ctx->staging.flags |= RXON_FLG_SELF_CTS_EN;
1486 else
1487 ctx->staging.flags &= ~RXON_FLG_SELF_CTS_EN;
1488
1489 memcpy(ctx->staging.bssid_addr, bss_conf->bssid, ETH_ALEN);
1490
1491 if (vif->type == NL80211_IFTYPE_AP ||
1492 vif->type == NL80211_IFTYPE_ADHOC) {
1493 if (vif->bss_conf.enable_beacon) {
1494 ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
1495 priv->beacon_ctx = ctx;
1496 } else {
1497 ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
1498 priv->beacon_ctx = NULL;
1499 }
1500 }
1501
1502 /*
1503 * If the ucode decides to do beacon filtering before
1504 * association, it will lose beacons that are needed
1505 * before sending frames out on passive channels. This
1506 * causes association failures on those channels. Enable
1507 * receiving beacons in such cases.
1508 */
1509
1510 if (vif->type == NL80211_IFTYPE_STATION) {
1511 if (!bss_conf->assoc)
1512 ctx->staging.filter_flags |= RXON_FILTER_BCON_AWARE_MSK;
1513 else
1514 ctx->staging.filter_flags &=
1515 ~RXON_FILTER_BCON_AWARE_MSK;
1516 }
1517
1518 if (force || memcmp(&ctx->staging, &ctx->active, sizeof(ctx->staging)))
1519 iwlagn_commit_rxon(priv, ctx);
1520
1521 if (changes & BSS_CHANGED_ASSOC && bss_conf->assoc) {
1522 /*
1523 * The chain noise calibration will enable PM upon
1524 * completion. If calibration has already been run
1525 * then we need to enable power management here.
1526 */
1527 if (priv->chain_noise_data.state == IWL_CHAIN_NOISE_DONE)
1528 iwl_power_update_mode(priv, false);
1529
1530 /* Enable RX differential gain and sensitivity calibrations */
1531 iwlagn_chain_noise_reset(priv);
1532 priv->start_calib = 1;
1533 }
1534
1535 if (changes & BSS_CHANGED_IBSS) {
1536 ret = iwlagn_manage_ibss_station(priv, vif,
1537 bss_conf->ibss_joined);
1538 if (ret)
1539 IWL_ERR(priv, "failed to %s IBSS station %pM\n",
1540 bss_conf->ibss_joined ? "add" : "remove",
1541 bss_conf->bssid);
1542 }
1543
1544 if (changes & BSS_CHANGED_BEACON && priv->beacon_ctx == ctx) {
1545 if (iwlagn_update_beacon(priv, vif))
1546 IWL_ERR(priv, "Error updating beacon\n");
1547 }
1548
1549 mutex_unlock(&priv->mutex);
1550 }
1551
1552 void iwlagn_post_scan(struct iwl_priv *priv)
1553 {
1554 struct iwl_rxon_context *ctx;
1555
1556 /*
1557 * We do not commit power settings while scan is pending,
1558 * do it now if the settings changed.
1559 */
1560 iwl_power_set_mode(priv, &priv->power_data.sleep_cmd_next, false);
1561 iwl_set_tx_power(priv, priv->tx_power_next, false);
1562
1563 /*
1564 * Since setting the RXON may have been deferred while
1565 * performing the scan, fire one off if needed
1566 */
1567 for_each_context(priv, ctx)
1568 if (memcmp(&ctx->staging, &ctx->active, sizeof(ctx->staging)))
1569 iwlagn_commit_rxon(priv, ctx);
1570
1571 iwlagn_set_pan_params(priv);
1572 }
Linux kernel - Deliverables
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