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mwifiex: add custom IE framework
[deliverable/linux.git] / drivers / net / wireless / iwlwifi / iwl-agn-rxon.c
1 /******************************************************************************
2 *
3 * Copyright(c) 2003 - 2012 Intel Corporation. All rights reserved.
4 *
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of version 2 of the GNU General Public License as
7 * published by the Free Software Foundation.
8 *
9 * This program is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
12 * more details.
13 *
14 * You should have received a copy of the GNU General Public License along with
15 * this program; if not, write to the Free Software Foundation, Inc.,
16 * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
17 *
18 * The full GNU General Public License is included in this distribution in the
19 * file called LICENSE.
20 *
21 * Contact Information:
22 * Intel Linux Wireless <ilw@linux.intel.com>
23 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
24 *
25 *****************************************************************************/
26
27 #include <linux/etherdevice.h>
28 #include "iwl-dev.h"
29 #include "iwl-agn.h"
30 #include "iwl-agn-calib.h"
31 #include "iwl-trans.h"
32 #include "iwl-modparams.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 const struct iwl_channel_info *ch_info;
41
42 memset(&ctx->staging, 0, sizeof(ctx->staging));
43
44 if (!ctx->vif) {
45 ctx->staging.dev_type = ctx->unused_devtype;
46 } else
47 switch (ctx->vif->type) {
48 case NL80211_IFTYPE_AP:
49 ctx->staging.dev_type = ctx->ap_devtype;
50 break;
51
52 case NL80211_IFTYPE_STATION:
53 ctx->staging.dev_type = ctx->station_devtype;
54 ctx->staging.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
55 break;
56
57 case NL80211_IFTYPE_ADHOC:
58 ctx->staging.dev_type = ctx->ibss_devtype;
59 ctx->staging.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
60 ctx->staging.filter_flags = RXON_FILTER_BCON_AWARE_MSK |
61 RXON_FILTER_ACCEPT_GRP_MSK;
62 break;
63
64 default:
65 IWL_ERR(priv, "Unsupported interface type %d\n",
66 ctx->vif->type);
67 break;
68 }
69
70 #if 0
71 /* TODO: Figure out when short_preamble would be set and cache from
72 * that */
73 if (!hw_to_local(priv->hw)->short_preamble)
74 ctx->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
75 else
76 ctx->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
77 #endif
78
79 ch_info = iwl_get_channel_info(priv, priv->band,
80 le16_to_cpu(ctx->active.channel));
81
82 if (!ch_info)
83 ch_info = &priv->channel_info[0];
84
85 ctx->staging.channel = cpu_to_le16(ch_info->channel);
86 priv->band = ch_info->band;
87
88 iwl_set_flags_for_band(priv, ctx, priv->band, ctx->vif);
89
90 /* clear both MIX and PURE40 mode flag */
91 ctx->staging.flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED |
92 RXON_FLG_CHANNEL_MODE_PURE_40);
93 if (ctx->vif)
94 memcpy(ctx->staging.node_addr, ctx->vif->addr, ETH_ALEN);
95
96 ctx->staging.ofdm_ht_single_stream_basic_rates = 0xff;
97 ctx->staging.ofdm_ht_dual_stream_basic_rates = 0xff;
98 ctx->staging.ofdm_ht_triple_stream_basic_rates = 0xff;
99 }
100
101 static int iwlagn_disable_bss(struct iwl_priv *priv,
102 struct iwl_rxon_context *ctx,
103 struct iwl_rxon_cmd *send)
104 {
105 __le32 old_filter = send->filter_flags;
106 int ret;
107
108 send->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
109 ret = iwl_dvm_send_cmd_pdu(priv, ctx->rxon_cmd,
110 CMD_SYNC, sizeof(*send), send);
111
112 send->filter_flags = old_filter;
113
114 if (ret)
115 IWL_DEBUG_QUIET_RFKILL(priv,
116 "Error clearing ASSOC_MSK on BSS (%d)\n", ret);
117
118 return ret;
119 }
120
121 static int iwlagn_disable_pan(struct iwl_priv *priv,
122 struct iwl_rxon_context *ctx,
123 struct iwl_rxon_cmd *send)
124 {
125 struct iwl_notification_wait disable_wait;
126 __le32 old_filter = send->filter_flags;
127 u8 old_dev_type = send->dev_type;
128 int ret;
129 static const u8 deactivate_cmd[] = {
130 REPLY_WIPAN_DEACTIVATION_COMPLETE
131 };
132
133 iwl_init_notification_wait(&priv->notif_wait, &disable_wait,
134 deactivate_cmd, ARRAY_SIZE(deactivate_cmd),
135 NULL, NULL);
136
137 send->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
138 send->dev_type = RXON_DEV_TYPE_P2P;
139 ret = iwl_dvm_send_cmd_pdu(priv, ctx->rxon_cmd,
140 CMD_SYNC, sizeof(*send), send);
141
142 send->filter_flags = old_filter;
143 send->dev_type = old_dev_type;
144
145 if (ret) {
146 IWL_ERR(priv, "Error disabling PAN (%d)\n", ret);
147 iwl_remove_notification(&priv->notif_wait, &disable_wait);
148 } else {
149 ret = iwl_wait_notification(&priv->notif_wait,
150 &disable_wait, HZ);
151 if (ret)
152 IWL_ERR(priv, "Timed out waiting for PAN disable\n");
153 }
154
155 return ret;
156 }
157
158 static int iwlagn_disconn_pan(struct iwl_priv *priv,
159 struct iwl_rxon_context *ctx,
160 struct iwl_rxon_cmd *send)
161 {
162 __le32 old_filter = send->filter_flags;
163 int ret;
164
165 send->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
166 ret = iwl_dvm_send_cmd_pdu(priv, ctx->rxon_cmd, CMD_SYNC,
167 sizeof(*send), send);
168
169 send->filter_flags = old_filter;
170
171 return ret;
172 }
173
174 void iwlagn_update_qos(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
175 {
176 int ret;
177
178 if (!ctx->is_active)
179 return;
180
181 ctx->qos_data.def_qos_parm.qos_flags = 0;
182
183 if (ctx->qos_data.qos_active)
184 ctx->qos_data.def_qos_parm.qos_flags |=
185 QOS_PARAM_FLG_UPDATE_EDCA_MSK;
186
187 if (ctx->ht.enabled)
188 ctx->qos_data.def_qos_parm.qos_flags |= QOS_PARAM_FLG_TGN_MSK;
189
190 IWL_DEBUG_INFO(priv, "send QoS cmd with Qos active=%d FLAGS=0x%X\n",
191 ctx->qos_data.qos_active,
192 ctx->qos_data.def_qos_parm.qos_flags);
193
194 ret = iwl_dvm_send_cmd_pdu(priv, ctx->qos_cmd, CMD_SYNC,
195 sizeof(struct iwl_qosparam_cmd),
196 &ctx->qos_data.def_qos_parm);
197 if (ret)
198 IWL_DEBUG_QUIET_RFKILL(priv, "Failed to update QoS\n");
199 }
200
201 int iwlagn_update_beacon(struct iwl_priv *priv,
202 struct ieee80211_vif *vif)
203 {
204 lockdep_assert_held(&priv->mutex);
205
206 dev_kfree_skb(priv->beacon_skb);
207 priv->beacon_skb = ieee80211_beacon_get(priv->hw, vif);
208 if (!priv->beacon_skb)
209 return -ENOMEM;
210 return iwlagn_send_beacon_cmd(priv);
211 }
212
213 static int iwlagn_send_rxon_assoc(struct iwl_priv *priv,
214 struct iwl_rxon_context *ctx)
215 {
216 int ret = 0;
217 struct iwl_rxon_assoc_cmd rxon_assoc;
218 const struct iwl_rxon_cmd *rxon1 = &ctx->staging;
219 const struct iwl_rxon_cmd *rxon2 = &ctx->active;
220
221 if ((rxon1->flags == rxon2->flags) &&
222 (rxon1->filter_flags == rxon2->filter_flags) &&
223 (rxon1->cck_basic_rates == rxon2->cck_basic_rates) &&
224 (rxon1->ofdm_ht_single_stream_basic_rates ==
225 rxon2->ofdm_ht_single_stream_basic_rates) &&
226 (rxon1->ofdm_ht_dual_stream_basic_rates ==
227 rxon2->ofdm_ht_dual_stream_basic_rates) &&
228 (rxon1->ofdm_ht_triple_stream_basic_rates ==
229 rxon2->ofdm_ht_triple_stream_basic_rates) &&
230 (rxon1->acquisition_data == rxon2->acquisition_data) &&
231 (rxon1->rx_chain == rxon2->rx_chain) &&
232 (rxon1->ofdm_basic_rates == rxon2->ofdm_basic_rates)) {
233 IWL_DEBUG_INFO(priv, "Using current RXON_ASSOC. Not resending.\n");
234 return 0;
235 }
236
237 rxon_assoc.flags = ctx->staging.flags;
238 rxon_assoc.filter_flags = ctx->staging.filter_flags;
239 rxon_assoc.ofdm_basic_rates = ctx->staging.ofdm_basic_rates;
240 rxon_assoc.cck_basic_rates = ctx->staging.cck_basic_rates;
241 rxon_assoc.reserved1 = 0;
242 rxon_assoc.reserved2 = 0;
243 rxon_assoc.reserved3 = 0;
244 rxon_assoc.ofdm_ht_single_stream_basic_rates =
245 ctx->staging.ofdm_ht_single_stream_basic_rates;
246 rxon_assoc.ofdm_ht_dual_stream_basic_rates =
247 ctx->staging.ofdm_ht_dual_stream_basic_rates;
248 rxon_assoc.rx_chain_select_flags = ctx->staging.rx_chain;
249 rxon_assoc.ofdm_ht_triple_stream_basic_rates =
250 ctx->staging.ofdm_ht_triple_stream_basic_rates;
251 rxon_assoc.acquisition_data = ctx->staging.acquisition_data;
252
253 ret = iwl_dvm_send_cmd_pdu(priv, ctx->rxon_assoc_cmd,
254 CMD_ASYNC, sizeof(rxon_assoc), &rxon_assoc);
255 return ret;
256 }
257
258 static u16 iwl_adjust_beacon_interval(u16 beacon_val, u16 max_beacon_val)
259 {
260 u16 new_val;
261 u16 beacon_factor;
262
263 /*
264 * If mac80211 hasn't given us a beacon interval, program
265 * the default into the device (not checking this here
266 * would cause the adjustment below to return the maximum
267 * value, which may break PAN.)
268 */
269 if (!beacon_val)
270 return DEFAULT_BEACON_INTERVAL;
271
272 /*
273 * If the beacon interval we obtained from the peer
274 * is too large, we'll have to wake up more often
275 * (and in IBSS case, we'll beacon too much)
276 *
277 * For example, if max_beacon_val is 4096, and the
278 * requested beacon interval is 7000, we'll have to
279 * use 3500 to be able to wake up on the beacons.
280 *
281 * This could badly influence beacon detection stats.
282 */
283
284 beacon_factor = (beacon_val + max_beacon_val) / max_beacon_val;
285 new_val = beacon_val / beacon_factor;
286
287 if (!new_val)
288 new_val = max_beacon_val;
289
290 return new_val;
291 }
292
293 static int iwl_send_rxon_timing(struct iwl_priv *priv,
294 struct iwl_rxon_context *ctx)
295 {
296 u64 tsf;
297 s32 interval_tm, rem;
298 struct ieee80211_conf *conf = NULL;
299 u16 beacon_int;
300 struct ieee80211_vif *vif = ctx->vif;
301
302 conf = &priv->hw->conf;
303
304 lockdep_assert_held(&priv->mutex);
305
306 memset(&ctx->timing, 0, sizeof(struct iwl_rxon_time_cmd));
307
308 ctx->timing.timestamp = cpu_to_le64(priv->timestamp);
309 ctx->timing.listen_interval = cpu_to_le16(conf->listen_interval);
310
311 beacon_int = vif ? vif->bss_conf.beacon_int : 0;
312
313 /*
314 * TODO: For IBSS we need to get atim_window from mac80211,
315 * for now just always use 0
316 */
317 ctx->timing.atim_window = 0;
318
319 if (ctx->ctxid == IWL_RXON_CTX_PAN &&
320 (!ctx->vif || ctx->vif->type != NL80211_IFTYPE_STATION) &&
321 iwl_is_associated(priv, IWL_RXON_CTX_BSS) &&
322 priv->contexts[IWL_RXON_CTX_BSS].vif &&
323 priv->contexts[IWL_RXON_CTX_BSS].vif->bss_conf.beacon_int) {
324 ctx->timing.beacon_interval =
325 priv->contexts[IWL_RXON_CTX_BSS].timing.beacon_interval;
326 beacon_int = le16_to_cpu(ctx->timing.beacon_interval);
327 } else if (ctx->ctxid == IWL_RXON_CTX_BSS &&
328 iwl_is_associated(priv, IWL_RXON_CTX_PAN) &&
329 priv->contexts[IWL_RXON_CTX_PAN].vif &&
330 priv->contexts[IWL_RXON_CTX_PAN].vif->bss_conf.beacon_int &&
331 (!iwl_is_associated_ctx(ctx) || !ctx->vif ||
332 !ctx->vif->bss_conf.beacon_int)) {
333 ctx->timing.beacon_interval =
334 priv->contexts[IWL_RXON_CTX_PAN].timing.beacon_interval;
335 beacon_int = le16_to_cpu(ctx->timing.beacon_interval);
336 } else {
337 beacon_int = iwl_adjust_beacon_interval(beacon_int,
338 IWL_MAX_UCODE_BEACON_INTERVAL * TIME_UNIT);
339 ctx->timing.beacon_interval = cpu_to_le16(beacon_int);
340 }
341
342 ctx->beacon_int = beacon_int;
343
344 tsf = priv->timestamp; /* tsf is modifed by do_div: copy it */
345 interval_tm = beacon_int * TIME_UNIT;
346 rem = do_div(tsf, interval_tm);
347 ctx->timing.beacon_init_val = cpu_to_le32(interval_tm - rem);
348
349 ctx->timing.dtim_period = vif ? (vif->bss_conf.dtim_period ?: 1) : 1;
350
351 IWL_DEBUG_ASSOC(priv,
352 "beacon interval %d beacon timer %d beacon tim %d\n",
353 le16_to_cpu(ctx->timing.beacon_interval),
354 le32_to_cpu(ctx->timing.beacon_init_val),
355 le16_to_cpu(ctx->timing.atim_window));
356
357 return iwl_dvm_send_cmd_pdu(priv, ctx->rxon_timing_cmd,
358 CMD_SYNC, sizeof(ctx->timing), &ctx->timing);
359 }
360
361 static int iwlagn_rxon_disconn(struct iwl_priv *priv,
362 struct iwl_rxon_context *ctx)
363 {
364 int ret;
365 struct iwl_rxon_cmd *active = (void *)&ctx->active;
366
367 if (ctx->ctxid == IWL_RXON_CTX_BSS) {
368 ret = iwlagn_disable_bss(priv, ctx, &ctx->staging);
369 } else {
370 ret = iwlagn_disable_pan(priv, ctx, &ctx->staging);
371 if (ret)
372 return ret;
373 if (ctx->vif) {
374 ret = iwl_send_rxon_timing(priv, ctx);
375 if (ret) {
376 IWL_ERR(priv, "Failed to send timing (%d)!\n", ret);
377 return ret;
378 }
379 ret = iwlagn_disconn_pan(priv, ctx, &ctx->staging);
380 }
381 }
382 if (ret)
383 return ret;
384
385 /*
386 * Un-assoc RXON clears the station table and WEP
387 * keys, so we have to restore those afterwards.
388 */
389 iwl_clear_ucode_stations(priv, ctx);
390 /* update -- might need P2P now */
391 iwl_update_bcast_station(priv, ctx);
392 iwl_restore_stations(priv, ctx);
393 ret = iwl_restore_default_wep_keys(priv, ctx);
394 if (ret) {
395 IWL_ERR(priv, "Failed to restore WEP keys (%d)\n", ret);
396 return ret;
397 }
398
399 memcpy(active, &ctx->staging, sizeof(*active));
400 return 0;
401 }
402
403 static int iwl_set_tx_power(struct iwl_priv *priv, s8 tx_power, bool force)
404 {
405 int ret;
406 s8 prev_tx_power;
407 bool defer;
408 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
409
410 if (priv->calib_disabled & IWL_TX_POWER_CALIB_DISABLED)
411 return 0;
412
413 lockdep_assert_held(&priv->mutex);
414
415 if (priv->tx_power_user_lmt == tx_power && !force)
416 return 0;
417
418 if (tx_power < IWLAGN_TX_POWER_TARGET_POWER_MIN) {
419 IWL_WARN(priv,
420 "Requested user TXPOWER %d below lower limit %d.\n",
421 tx_power,
422 IWLAGN_TX_POWER_TARGET_POWER_MIN);
423 return -EINVAL;
424 }
425
426 if (tx_power > priv->tx_power_device_lmt) {
427 IWL_WARN(priv,
428 "Requested user TXPOWER %d above upper limit %d.\n",
429 tx_power, priv->tx_power_device_lmt);
430 return -EINVAL;
431 }
432
433 if (!iwl_is_ready_rf(priv))
434 return -EIO;
435
436 /* scan complete and commit_rxon use tx_power_next value,
437 * it always need to be updated for newest request */
438 priv->tx_power_next = tx_power;
439
440 /* do not set tx power when scanning or channel changing */
441 defer = test_bit(STATUS_SCANNING, &priv->status) ||
442 memcmp(&ctx->active, &ctx->staging, sizeof(ctx->staging));
443 if (defer && !force) {
444 IWL_DEBUG_INFO(priv, "Deferring tx power set\n");
445 return 0;
446 }
447
448 prev_tx_power = priv->tx_power_user_lmt;
449 priv->tx_power_user_lmt = tx_power;
450
451 ret = iwlagn_send_tx_power(priv);
452
453 /* if fail to set tx_power, restore the orig. tx power */
454 if (ret) {
455 priv->tx_power_user_lmt = prev_tx_power;
456 priv->tx_power_next = prev_tx_power;
457 }
458 return ret;
459 }
460
461 static int iwlagn_rxon_connect(struct iwl_priv *priv,
462 struct iwl_rxon_context *ctx)
463 {
464 int ret;
465 struct iwl_rxon_cmd *active = (void *)&ctx->active;
466
467 /* RXON timing must be before associated RXON */
468 if (ctx->ctxid == IWL_RXON_CTX_BSS) {
469 ret = iwl_send_rxon_timing(priv, ctx);
470 if (ret) {
471 IWL_ERR(priv, "Failed to send timing (%d)!\n", ret);
472 return ret;
473 }
474 }
475 /* QoS info may be cleared by previous un-assoc RXON */
476 iwlagn_update_qos(priv, ctx);
477
478 /*
479 * We'll run into this code path when beaconing is
480 * enabled, but then we also need to send the beacon
481 * to the device.
482 */
483 if (ctx->vif && (ctx->vif->type == NL80211_IFTYPE_AP)) {
484 ret = iwlagn_update_beacon(priv, ctx->vif);
485 if (ret) {
486 IWL_ERR(priv,
487 "Error sending required beacon (%d)!\n",
488 ret);
489 return ret;
490 }
491 }
492
493 priv->start_calib = 0;
494 /*
495 * Apply the new configuration.
496 *
497 * Associated RXON doesn't clear the station table in uCode,
498 * so we don't need to restore stations etc. after this.
499 */
500 ret = iwl_dvm_send_cmd_pdu(priv, ctx->rxon_cmd, CMD_SYNC,
501 sizeof(struct iwl_rxon_cmd), &ctx->staging);
502 if (ret) {
503 IWL_ERR(priv, "Error setting new RXON (%d)\n", ret);
504 return ret;
505 }
506 memcpy(active, &ctx->staging, sizeof(*active));
507
508 /* IBSS beacon needs to be sent after setting assoc */
509 if (ctx->vif && (ctx->vif->type == NL80211_IFTYPE_ADHOC))
510 if (iwlagn_update_beacon(priv, ctx->vif))
511 IWL_ERR(priv, "Error sending IBSS beacon\n");
512 iwl_init_sensitivity(priv);
513
514 /*
515 * If we issue a new RXON command which required a tune then
516 * we must send a new TXPOWER command or we won't be able to
517 * Tx any frames.
518 *
519 * It's expected we set power here if channel is changing.
520 */
521 ret = iwl_set_tx_power(priv, priv->tx_power_next, true);
522 if (ret) {
523 IWL_ERR(priv, "Error sending TX power (%d)\n", ret);
524 return ret;
525 }
526
527 if (ctx->vif && ctx->vif->type == NL80211_IFTYPE_STATION &&
528 priv->cfg->ht_params && priv->cfg->ht_params->smps_mode)
529 ieee80211_request_smps(ctx->vif,
530 priv->cfg->ht_params->smps_mode);
531
532 return 0;
533 }
534
535 int iwlagn_set_pan_params(struct iwl_priv *priv)
536 {
537 struct iwl_wipan_params_cmd cmd;
538 struct iwl_rxon_context *ctx_bss, *ctx_pan;
539 int slot0 = 300, slot1 = 0;
540 int ret;
541
542 if (priv->valid_contexts == BIT(IWL_RXON_CTX_BSS))
543 return 0;
544
545 BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
546
547 lockdep_assert_held(&priv->mutex);
548
549 ctx_bss = &priv->contexts[IWL_RXON_CTX_BSS];
550 ctx_pan = &priv->contexts[IWL_RXON_CTX_PAN];
551
552 /*
553 * If the PAN context is inactive, then we don't need
554 * to update the PAN parameters, the last thing we'll
555 * have done before it goes inactive is making the PAN
556 * parameters be WLAN-only.
557 */
558 if (!ctx_pan->is_active)
559 return 0;
560
561 memset(&cmd, 0, sizeof(cmd));
562
563 /* only 2 slots are currently allowed */
564 cmd.num_slots = 2;
565
566 cmd.slots[0].type = 0; /* BSS */
567 cmd.slots[1].type = 1; /* PAN */
568
569 if (priv->hw_roc_setup) {
570 /* both contexts must be used for this to happen */
571 slot1 = IWL_MIN_SLOT_TIME;
572 slot0 = 3000;
573 } else if (ctx_bss->vif && ctx_pan->vif) {
574 int bcnint = ctx_pan->beacon_int;
575 int dtim = ctx_pan->vif->bss_conf.dtim_period ?: 1;
576
577 /* should be set, but seems unused?? */
578 cmd.flags |= cpu_to_le16(IWL_WIPAN_PARAMS_FLG_SLOTTED_MODE);
579
580 if (ctx_pan->vif->type == NL80211_IFTYPE_AP &&
581 bcnint &&
582 bcnint != ctx_bss->beacon_int) {
583 IWL_ERR(priv,
584 "beacon intervals don't match (%d, %d)\n",
585 ctx_bss->beacon_int, ctx_pan->beacon_int);
586 } else
587 bcnint = max_t(int, bcnint,
588 ctx_bss->beacon_int);
589 if (!bcnint)
590 bcnint = DEFAULT_BEACON_INTERVAL;
591 slot0 = bcnint / 2;
592 slot1 = bcnint - slot0;
593
594 if (test_bit(STATUS_SCAN_HW, &priv->status) ||
595 (!ctx_bss->vif->bss_conf.idle &&
596 !ctx_bss->vif->bss_conf.assoc)) {
597 slot0 = dtim * bcnint * 3 - IWL_MIN_SLOT_TIME;
598 slot1 = IWL_MIN_SLOT_TIME;
599 } else if (!ctx_pan->vif->bss_conf.idle &&
600 !ctx_pan->vif->bss_conf.assoc) {
601 slot1 = dtim * bcnint * 3 - IWL_MIN_SLOT_TIME;
602 slot0 = IWL_MIN_SLOT_TIME;
603 }
604 } else if (ctx_pan->vif) {
605 slot0 = 0;
606 slot1 = max_t(int, 1, ctx_pan->vif->bss_conf.dtim_period) *
607 ctx_pan->beacon_int;
608 slot1 = max_t(int, DEFAULT_BEACON_INTERVAL, slot1);
609
610 if (test_bit(STATUS_SCAN_HW, &priv->status)) {
611 slot0 = slot1 * 3 - IWL_MIN_SLOT_TIME;
612 slot1 = IWL_MIN_SLOT_TIME;
613 }
614 }
615
616 cmd.slots[0].width = cpu_to_le16(slot0);
617 cmd.slots[1].width = cpu_to_le16(slot1);
618
619 ret = iwl_dvm_send_cmd_pdu(priv, REPLY_WIPAN_PARAMS, CMD_SYNC,
620 sizeof(cmd), &cmd);
621 if (ret)
622 IWL_ERR(priv, "Error setting PAN parameters (%d)\n", ret);
623
624 return ret;
625 }
626
627 static void _iwl_set_rxon_ht(struct iwl_priv *priv,
628 struct iwl_ht_config *ht_conf,
629 struct iwl_rxon_context *ctx)
630 {
631 struct iwl_rxon_cmd *rxon = &ctx->staging;
632
633 if (!ctx->ht.enabled) {
634 rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |
635 RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK |
636 RXON_FLG_HT40_PROT_MSK |
637 RXON_FLG_HT_PROT_MSK);
638 return;
639 }
640
641 /* FIXME: if the definition of ht.protection changed, the "translation"
642 * will be needed for rxon->flags
643 */
644 rxon->flags |= cpu_to_le32(ctx->ht.protection <<
645 RXON_FLG_HT_OPERATING_MODE_POS);
646
647 /* Set up channel bandwidth:
648 * 20 MHz only, 20/40 mixed or pure 40 if ht40 ok */
649 /* clear the HT channel mode before set the mode */
650 rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |
651 RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
652 if (iwl_is_ht40_tx_allowed(priv, ctx, NULL)) {
653 /* pure ht40 */
654 if (ctx->ht.protection ==
655 IEEE80211_HT_OP_MODE_PROTECTION_20MHZ) {
656 rxon->flags |= RXON_FLG_CHANNEL_MODE_PURE_40;
657 /*
658 * Note: control channel is opposite of extension
659 * channel
660 */
661 switch (ctx->ht.extension_chan_offset) {
662 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
663 rxon->flags &=
664 ~RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
665 break;
666 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
667 rxon->flags |=
668 RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
669 break;
670 }
671 } else {
672 /*
673 * Note: control channel is opposite of extension
674 * channel
675 */
676 switch (ctx->ht.extension_chan_offset) {
677 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
678 rxon->flags &=
679 ~(RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
680 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
681 break;
682 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
683 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
684 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
685 break;
686 case IEEE80211_HT_PARAM_CHA_SEC_NONE:
687 default:
688 /*
689 * channel location only valid if in Mixed
690 * mode
691 */
692 IWL_ERR(priv,
693 "invalid extension channel offset\n");
694 break;
695 }
696 }
697 } else {
698 rxon->flags |= RXON_FLG_CHANNEL_MODE_LEGACY;
699 }
700
701 iwlagn_set_rxon_chain(priv, ctx);
702
703 IWL_DEBUG_ASSOC(priv, "rxon flags 0x%X operation mode :0x%X "
704 "extension channel offset 0x%x\n",
705 le32_to_cpu(rxon->flags), ctx->ht.protection,
706 ctx->ht.extension_chan_offset);
707 }
708
709 void iwl_set_rxon_ht(struct iwl_priv *priv, struct iwl_ht_config *ht_conf)
710 {
711 struct iwl_rxon_context *ctx;
712
713 for_each_context(priv, ctx)
714 _iwl_set_rxon_ht(priv, ht_conf, ctx);
715 }
716
717 /**
718 * iwl_set_rxon_channel - Set the band and channel values in staging RXON
719 * @ch: requested channel as a pointer to struct ieee80211_channel
720
721 * NOTE: Does not commit to the hardware; it sets appropriate bit fields
722 * in the staging RXON flag structure based on the ch->band
723 */
724 void iwl_set_rxon_channel(struct iwl_priv *priv, struct ieee80211_channel *ch,
725 struct iwl_rxon_context *ctx)
726 {
727 enum ieee80211_band band = ch->band;
728 u16 channel = ch->hw_value;
729
730 if ((le16_to_cpu(ctx->staging.channel) == channel) &&
731 (priv->band == band))
732 return;
733
734 ctx->staging.channel = cpu_to_le16(channel);
735 if (band == IEEE80211_BAND_5GHZ)
736 ctx->staging.flags &= ~RXON_FLG_BAND_24G_MSK;
737 else
738 ctx->staging.flags |= RXON_FLG_BAND_24G_MSK;
739
740 priv->band = band;
741
742 IWL_DEBUG_INFO(priv, "Staging channel set to %d [%d]\n", channel, band);
743
744 }
745
746 void iwl_set_flags_for_band(struct iwl_priv *priv,
747 struct iwl_rxon_context *ctx,
748 enum ieee80211_band band,
749 struct ieee80211_vif *vif)
750 {
751 if (band == IEEE80211_BAND_5GHZ) {
752 ctx->staging.flags &=
753 ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK
754 | RXON_FLG_CCK_MSK);
755 ctx->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
756 } else {
757 /* Copied from iwl_post_associate() */
758 if (vif && vif->bss_conf.use_short_slot)
759 ctx->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
760 else
761 ctx->staging.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
762
763 ctx->staging.flags |= RXON_FLG_BAND_24G_MSK;
764 ctx->staging.flags |= RXON_FLG_AUTO_DETECT_MSK;
765 ctx->staging.flags &= ~RXON_FLG_CCK_MSK;
766 }
767 }
768
769 static void iwl_set_rxon_hwcrypto(struct iwl_priv *priv,
770 struct iwl_rxon_context *ctx, int hw_decrypt)
771 {
772 struct iwl_rxon_cmd *rxon = &ctx->staging;
773
774 if (hw_decrypt)
775 rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
776 else
777 rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;
778
779 }
780
781 /* validate RXON structure is valid */
782 static int iwl_check_rxon_cmd(struct iwl_priv *priv,
783 struct iwl_rxon_context *ctx)
784 {
785 struct iwl_rxon_cmd *rxon = &ctx->staging;
786 u32 errors = 0;
787
788 if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
789 if (rxon->flags & RXON_FLG_TGJ_NARROW_BAND_MSK) {
790 IWL_WARN(priv, "check 2.4G: wrong narrow\n");
791 errors |= BIT(0);
792 }
793 if (rxon->flags & RXON_FLG_RADAR_DETECT_MSK) {
794 IWL_WARN(priv, "check 2.4G: wrong radar\n");
795 errors |= BIT(1);
796 }
797 } else {
798 if (!(rxon->flags & RXON_FLG_SHORT_SLOT_MSK)) {
799 IWL_WARN(priv, "check 5.2G: not short slot!\n");
800 errors |= BIT(2);
801 }
802 if (rxon->flags & RXON_FLG_CCK_MSK) {
803 IWL_WARN(priv, "check 5.2G: CCK!\n");
804 errors |= BIT(3);
805 }
806 }
807 if ((rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1) {
808 IWL_WARN(priv, "mac/bssid mcast!\n");
809 errors |= BIT(4);
810 }
811
812 /* make sure basic rates 6Mbps and 1Mbps are supported */
813 if ((rxon->ofdm_basic_rates & IWL_RATE_6M_MASK) == 0 &&
814 (rxon->cck_basic_rates & IWL_RATE_1M_MASK) == 0) {
815 IWL_WARN(priv, "neither 1 nor 6 are basic\n");
816 errors |= BIT(5);
817 }
818
819 if (le16_to_cpu(rxon->assoc_id) > 2007) {
820 IWL_WARN(priv, "aid > 2007\n");
821 errors |= BIT(6);
822 }
823
824 if ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK))
825 == (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK)) {
826 IWL_WARN(priv, "CCK and short slot\n");
827 errors |= BIT(7);
828 }
829
830 if ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK))
831 == (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK)) {
832 IWL_WARN(priv, "CCK and auto detect");
833 errors |= BIT(8);
834 }
835
836 if ((rxon->flags & (RXON_FLG_AUTO_DETECT_MSK |
837 RXON_FLG_TGG_PROTECT_MSK)) ==
838 RXON_FLG_TGG_PROTECT_MSK) {
839 IWL_WARN(priv, "TGg but no auto-detect\n");
840 errors |= BIT(9);
841 }
842
843 if (rxon->channel == 0) {
844 IWL_WARN(priv, "zero channel is invalid\n");
845 errors |= BIT(10);
846 }
847
848 WARN(errors, "Invalid RXON (%#x), channel %d",
849 errors, le16_to_cpu(rxon->channel));
850
851 return errors ? -EINVAL : 0;
852 }
853
854 /**
855 * iwl_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed
856 * @priv: staging_rxon is compared to active_rxon
857 *
858 * If the RXON structure is changing enough to require a new tune,
859 * or is clearing the RXON_FILTER_ASSOC_MSK, then return 1 to indicate that
860 * a new tune (full RXON command, rather than RXON_ASSOC cmd) is required.
861 */
862 int iwl_full_rxon_required(struct iwl_priv *priv,
863 struct iwl_rxon_context *ctx)
864 {
865 const struct iwl_rxon_cmd *staging = &ctx->staging;
866 const struct iwl_rxon_cmd *active = &ctx->active;
867
868 #define CHK(cond) \
869 if ((cond)) { \
870 IWL_DEBUG_INFO(priv, "need full RXON - " #cond "\n"); \
871 return 1; \
872 }
873
874 #define CHK_NEQ(c1, c2) \
875 if ((c1) != (c2)) { \
876 IWL_DEBUG_INFO(priv, "need full RXON - " \
877 #c1 " != " #c2 " - %d != %d\n", \
878 (c1), (c2)); \
879 return 1; \
880 }
881
882 /* These items are only settable from the full RXON command */
883 CHK(!iwl_is_associated_ctx(ctx));
884 CHK(compare_ether_addr(staging->bssid_addr, active->bssid_addr));
885 CHK(compare_ether_addr(staging->node_addr, active->node_addr));
886 CHK(compare_ether_addr(staging->wlap_bssid_addr,
887 active->wlap_bssid_addr));
888 CHK_NEQ(staging->dev_type, active->dev_type);
889 CHK_NEQ(staging->channel, active->channel);
890 CHK_NEQ(staging->air_propagation, active->air_propagation);
891 CHK_NEQ(staging->ofdm_ht_single_stream_basic_rates,
892 active->ofdm_ht_single_stream_basic_rates);
893 CHK_NEQ(staging->ofdm_ht_dual_stream_basic_rates,
894 active->ofdm_ht_dual_stream_basic_rates);
895 CHK_NEQ(staging->ofdm_ht_triple_stream_basic_rates,
896 active->ofdm_ht_triple_stream_basic_rates);
897 CHK_NEQ(staging->assoc_id, active->assoc_id);
898
899 /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
900 * be updated with the RXON_ASSOC command -- however only some
901 * flag transitions are allowed using RXON_ASSOC */
902
903 /* Check if we are not switching bands */
904 CHK_NEQ(staging->flags & RXON_FLG_BAND_24G_MSK,
905 active->flags & RXON_FLG_BAND_24G_MSK);
906
907 /* Check if we are switching association toggle */
908 CHK_NEQ(staging->filter_flags & RXON_FILTER_ASSOC_MSK,
909 active->filter_flags & RXON_FILTER_ASSOC_MSK);
910
911 #undef CHK
912 #undef CHK_NEQ
913
914 return 0;
915 }
916
917 #ifdef CONFIG_IWLWIFI_DEBUG
918 void iwl_print_rx_config_cmd(struct iwl_priv *priv,
919 enum iwl_rxon_context_id ctxid)
920 {
921 struct iwl_rxon_context *ctx = &priv->contexts[ctxid];
922 struct iwl_rxon_cmd *rxon = &ctx->staging;
923
924 IWL_DEBUG_RADIO(priv, "RX CONFIG:\n");
925 iwl_print_hex_dump(priv, IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
926 IWL_DEBUG_RADIO(priv, "u16 channel: 0x%x\n",
927 le16_to_cpu(rxon->channel));
928 IWL_DEBUG_RADIO(priv, "u32 flags: 0x%08X\n",
929 le32_to_cpu(rxon->flags));
930 IWL_DEBUG_RADIO(priv, "u32 filter_flags: 0x%08x\n",
931 le32_to_cpu(rxon->filter_flags));
932 IWL_DEBUG_RADIO(priv, "u8 dev_type: 0x%x\n", rxon->dev_type);
933 IWL_DEBUG_RADIO(priv, "u8 ofdm_basic_rates: 0x%02x\n",
934 rxon->ofdm_basic_rates);
935 IWL_DEBUG_RADIO(priv, "u8 cck_basic_rates: 0x%02x\n",
936 rxon->cck_basic_rates);
937 IWL_DEBUG_RADIO(priv, "u8[6] node_addr: %pM\n", rxon->node_addr);
938 IWL_DEBUG_RADIO(priv, "u8[6] bssid_addr: %pM\n", rxon->bssid_addr);
939 IWL_DEBUG_RADIO(priv, "u16 assoc_id: 0x%x\n",
940 le16_to_cpu(rxon->assoc_id));
941 }
942 #endif
943
944 static void iwl_calc_basic_rates(struct iwl_priv *priv,
945 struct iwl_rxon_context *ctx)
946 {
947 int lowest_present_ofdm = 100;
948 int lowest_present_cck = 100;
949 u8 cck = 0;
950 u8 ofdm = 0;
951
952 if (ctx->vif) {
953 struct ieee80211_supported_band *sband;
954 unsigned long basic = ctx->vif->bss_conf.basic_rates;
955 int i;
956
957 sband = priv->hw->wiphy->bands[priv->hw->conf.channel->band];
958
959 for_each_set_bit(i, &basic, BITS_PER_LONG) {
960 int hw = sband->bitrates[i].hw_value;
961 if (hw >= IWL_FIRST_OFDM_RATE) {
962 ofdm |= BIT(hw - IWL_FIRST_OFDM_RATE);
963 if (lowest_present_ofdm > hw)
964 lowest_present_ofdm = hw;
965 } else {
966 BUILD_BUG_ON(IWL_FIRST_CCK_RATE != 0);
967
968 cck |= BIT(hw);
969 if (lowest_present_cck > hw)
970 lowest_present_cck = hw;
971 }
972 }
973 }
974
975 /*
976 * Now we've got the basic rates as bitmaps in the ofdm and cck
977 * variables. This isn't sufficient though, as there might not
978 * be all the right rates in the bitmap. E.g. if the only basic
979 * rates are 5.5 Mbps and 11 Mbps, we still need to add 1 Mbps
980 * and 6 Mbps because the 802.11-2007 standard says in 9.6:
981 *
982 * [...] a STA responding to a received frame shall transmit
983 * its Control Response frame [...] at the highest rate in the
984 * BSSBasicRateSet parameter that is less than or equal to the
985 * rate of the immediately previous frame in the frame exchange
986 * sequence ([...]) and that is of the same modulation class
987 * ([...]) as the received frame. If no rate contained in the
988 * BSSBasicRateSet parameter meets these conditions, then the
989 * control frame sent in response to a received frame shall be
990 * transmitted at the highest mandatory rate of the PHY that is
991 * less than or equal to the rate of the received frame, and
992 * that is of the same modulation class as the received frame.
993 *
994 * As a consequence, we need to add all mandatory rates that are
995 * lower than all of the basic rates to these bitmaps.
996 */
997
998 if (IWL_RATE_24M_INDEX < lowest_present_ofdm)
999 ofdm |= IWL_RATE_24M_MASK >> IWL_FIRST_OFDM_RATE;
1000 if (IWL_RATE_12M_INDEX < lowest_present_ofdm)
1001 ofdm |= IWL_RATE_12M_MASK >> IWL_FIRST_OFDM_RATE;
1002 /* 6M already there or needed so always add */
1003 ofdm |= IWL_RATE_6M_MASK >> IWL_FIRST_OFDM_RATE;
1004
1005 /*
1006 * CCK is a bit more complex with DSSS vs. HR/DSSS vs. ERP.
1007 * Note, however:
1008 * - if no CCK rates are basic, it must be ERP since there must
1009 * be some basic rates at all, so they're OFDM => ERP PHY
1010 * (or we're in 5 GHz, and the cck bitmap will never be used)
1011 * - if 11M is a basic rate, it must be ERP as well, so add 5.5M
1012 * - if 5.5M is basic, 1M and 2M are mandatory
1013 * - if 2M is basic, 1M is mandatory
1014 * - if 1M is basic, that's the only valid ACK rate.
1015 * As a consequence, it's not as complicated as it sounds, just add
1016 * any lower rates to the ACK rate bitmap.
1017 */
1018 if (IWL_RATE_11M_INDEX < lowest_present_ofdm)
1019 ofdm |= IWL_RATE_11M_MASK >> IWL_FIRST_CCK_RATE;
1020 if (IWL_RATE_5M_INDEX < lowest_present_ofdm)
1021 ofdm |= IWL_RATE_5M_MASK >> IWL_FIRST_CCK_RATE;
1022 if (IWL_RATE_2M_INDEX < lowest_present_ofdm)
1023 ofdm |= IWL_RATE_2M_MASK >> IWL_FIRST_CCK_RATE;
1024 /* 1M already there or needed so always add */
1025 cck |= IWL_RATE_1M_MASK >> IWL_FIRST_CCK_RATE;
1026
1027 IWL_DEBUG_RATE(priv, "Set basic rates cck:0x%.2x ofdm:0x%.2x\n",
1028 cck, ofdm);
1029
1030 /* "basic_rates" is a misnomer here -- should be called ACK rates */
1031 ctx->staging.cck_basic_rates = cck;
1032 ctx->staging.ofdm_basic_rates = ofdm;
1033 }
1034
1035 /**
1036 * iwlagn_commit_rxon - commit staging_rxon to hardware
1037 *
1038 * The RXON command in staging_rxon is committed to the hardware and
1039 * the active_rxon structure is updated with the new data. This
1040 * function correctly transitions out of the RXON_ASSOC_MSK state if
1041 * a HW tune is required based on the RXON structure changes.
1042 *
1043 * The connect/disconnect flow should be as the following:
1044 *
1045 * 1. make sure send RXON command with association bit unset if not connect
1046 * this should include the channel and the band for the candidate
1047 * to be connected to
1048 * 2. Add Station before RXON association with the AP
1049 * 3. RXON_timing has to send before RXON for connection
1050 * 4. full RXON command - associated bit set
1051 * 5. use RXON_ASSOC command to update any flags changes
1052 */
1053 int iwlagn_commit_rxon(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
1054 {
1055 /* cast away the const for active_rxon in this function */
1056 struct iwl_rxon_cmd *active = (void *)&ctx->active;
1057 bool new_assoc = !!(ctx->staging.filter_flags & RXON_FILTER_ASSOC_MSK);
1058 int ret;
1059
1060 lockdep_assert_held(&priv->mutex);
1061
1062 if (!iwl_is_alive(priv))
1063 return -EBUSY;
1064
1065 /* This function hardcodes a bunch of dual-mode assumptions */
1066 BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
1067
1068 if (!ctx->is_active)
1069 return 0;
1070
1071 /* always get timestamp with Rx frame */
1072 ctx->staging.flags |= RXON_FLG_TSF2HOST_MSK;
1073
1074 /* recalculate basic rates */
1075 iwl_calc_basic_rates(priv, ctx);
1076
1077 /*
1078 * force CTS-to-self frames protection if RTS-CTS is not preferred
1079 * one aggregation protection method
1080 */
1081 if (!priv->hw_params.use_rts_for_aggregation)
1082 ctx->staging.flags |= RXON_FLG_SELF_CTS_EN;
1083
1084 if ((ctx->vif && ctx->vif->bss_conf.use_short_slot) ||
1085 !(ctx->staging.flags & RXON_FLG_BAND_24G_MSK))
1086 ctx->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
1087 else
1088 ctx->staging.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
1089
1090 iwl_print_rx_config_cmd(priv, ctx->ctxid);
1091 ret = iwl_check_rxon_cmd(priv, ctx);
1092 if (ret) {
1093 IWL_ERR(priv, "Invalid RXON configuration. Not committing.\n");
1094 return -EINVAL;
1095 }
1096
1097 /*
1098 * receive commit_rxon request
1099 * abort any previous channel switch if still in process
1100 */
1101 if (test_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status) &&
1102 (priv->switch_channel != ctx->staging.channel)) {
1103 IWL_DEBUG_11H(priv, "abort channel switch on %d\n",
1104 le16_to_cpu(priv->switch_channel));
1105 iwl_chswitch_done(priv, false);
1106 }
1107
1108 /*
1109 * If we don't need to send a full RXON, we can use
1110 * iwl_rxon_assoc_cmd which is used to reconfigure filter
1111 * and other flags for the current radio configuration.
1112 */
1113 if (!iwl_full_rxon_required(priv, ctx)) {
1114 ret = iwlagn_send_rxon_assoc(priv, ctx);
1115 if (ret) {
1116 IWL_ERR(priv, "Error setting RXON_ASSOC (%d)\n", ret);
1117 return ret;
1118 }
1119
1120 memcpy(active, &ctx->staging, sizeof(*active));
1121 /*
1122 * We do not commit tx power settings while channel changing,
1123 * do it now if after settings changed.
1124 */
1125 iwl_set_tx_power(priv, priv->tx_power_next, false);
1126
1127 /* make sure we are in the right PS state */
1128 iwl_power_update_mode(priv, true);
1129
1130 return 0;
1131 }
1132
1133 iwl_set_rxon_hwcrypto(priv, ctx, !iwlwifi_mod_params.sw_crypto);
1134
1135 IWL_DEBUG_INFO(priv,
1136 "Going to commit RXON\n"
1137 " * with%s RXON_FILTER_ASSOC_MSK\n"
1138 " * channel = %d\n"
1139 " * bssid = %pM\n",
1140 (new_assoc ? "" : "out"),
1141 le16_to_cpu(ctx->staging.channel),
1142 ctx->staging.bssid_addr);
1143
1144 /*
1145 * Always clear associated first, but with the correct config.
1146 * This is required as for example station addition for the
1147 * AP station must be done after the BSSID is set to correctly
1148 * set up filters in the device.
1149 */
1150 ret = iwlagn_rxon_disconn(priv, ctx);
1151 if (ret)
1152 return ret;
1153
1154 ret = iwlagn_set_pan_params(priv);
1155 if (ret)
1156 return ret;
1157
1158 if (new_assoc)
1159 return iwlagn_rxon_connect(priv, ctx);
1160
1161 return 0;
1162 }
1163
1164 void iwlagn_config_ht40(struct ieee80211_conf *conf,
1165 struct iwl_rxon_context *ctx)
1166 {
1167 if (conf_is_ht40_minus(conf)) {
1168 ctx->ht.extension_chan_offset =
1169 IEEE80211_HT_PARAM_CHA_SEC_BELOW;
1170 ctx->ht.is_40mhz = true;
1171 } else if (conf_is_ht40_plus(conf)) {
1172 ctx->ht.extension_chan_offset =
1173 IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
1174 ctx->ht.is_40mhz = true;
1175 } else {
1176 ctx->ht.extension_chan_offset =
1177 IEEE80211_HT_PARAM_CHA_SEC_NONE;
1178 ctx->ht.is_40mhz = false;
1179 }
1180 }
1181
1182 int iwlagn_mac_config(struct ieee80211_hw *hw, u32 changed)
1183 {
1184 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1185 struct iwl_rxon_context *ctx;
1186 struct ieee80211_conf *conf = &hw->conf;
1187 struct ieee80211_channel *channel = conf->channel;
1188 const struct iwl_channel_info *ch_info;
1189 int ret = 0;
1190
1191 IWL_DEBUG_MAC80211(priv, "enter: changed %#x\n", changed);
1192
1193 mutex_lock(&priv->mutex);
1194
1195 if (unlikely(test_bit(STATUS_SCANNING, &priv->status))) {
1196 IWL_DEBUG_MAC80211(priv, "leave - scanning\n");
1197 goto out;
1198 }
1199
1200 if (!iwl_is_ready(priv)) {
1201 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
1202 goto out;
1203 }
1204
1205 if (changed & (IEEE80211_CONF_CHANGE_SMPS |
1206 IEEE80211_CONF_CHANGE_CHANNEL)) {
1207 /* mac80211 uses static for non-HT which is what we want */
1208 priv->current_ht_config.smps = conf->smps_mode;
1209
1210 /*
1211 * Recalculate chain counts.
1212 *
1213 * If monitor mode is enabled then mac80211 will
1214 * set up the SM PS mode to OFF if an HT channel is
1215 * configured.
1216 */
1217 for_each_context(priv, ctx)
1218 iwlagn_set_rxon_chain(priv, ctx);
1219 }
1220
1221 if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
1222 ch_info = iwl_get_channel_info(priv, channel->band,
1223 channel->hw_value);
1224 if (!is_channel_valid(ch_info)) {
1225 IWL_DEBUG_MAC80211(priv, "leave - invalid channel\n");
1226 ret = -EINVAL;
1227 goto out;
1228 }
1229
1230 for_each_context(priv, ctx) {
1231 /* Configure HT40 channels */
1232 if (ctx->ht.enabled != conf_is_ht(conf))
1233 ctx->ht.enabled = conf_is_ht(conf);
1234
1235 if (ctx->ht.enabled) {
1236 /* if HT40 is used, it should not change
1237 * after associated except channel switch */
1238 if (!ctx->ht.is_40mhz ||
1239 !iwl_is_associated_ctx(ctx))
1240 iwlagn_config_ht40(conf, ctx);
1241 } else
1242 ctx->ht.is_40mhz = false;
1243
1244 /*
1245 * Default to no protection. Protection mode will
1246 * later be set from BSS config in iwl_ht_conf
1247 */
1248 ctx->ht.protection = IEEE80211_HT_OP_MODE_PROTECTION_NONE;
1249
1250 /* if we are switching from ht to 2.4 clear flags
1251 * from any ht related info since 2.4 does not
1252 * support ht */
1253 if (le16_to_cpu(ctx->staging.channel) !=
1254 channel->hw_value)
1255 ctx->staging.flags = 0;
1256
1257 iwl_set_rxon_channel(priv, channel, ctx);
1258 iwl_set_rxon_ht(priv, &priv->current_ht_config);
1259
1260 iwl_set_flags_for_band(priv, ctx, channel->band,
1261 ctx->vif);
1262 }
1263
1264 iwl_update_bcast_stations(priv);
1265 }
1266
1267 if (changed & (IEEE80211_CONF_CHANGE_PS |
1268 IEEE80211_CONF_CHANGE_IDLE)) {
1269 ret = iwl_power_update_mode(priv, false);
1270 if (ret)
1271 IWL_DEBUG_MAC80211(priv, "Error setting sleep level\n");
1272 }
1273
1274 if (changed & IEEE80211_CONF_CHANGE_POWER) {
1275 IWL_DEBUG_MAC80211(priv, "TX Power old=%d new=%d\n",
1276 priv->tx_power_user_lmt, conf->power_level);
1277
1278 iwl_set_tx_power(priv, conf->power_level, false);
1279 }
1280
1281 for_each_context(priv, ctx) {
1282 if (!memcmp(&ctx->staging, &ctx->active, sizeof(ctx->staging)))
1283 continue;
1284 iwlagn_commit_rxon(priv, ctx);
1285 }
1286 out:
1287 mutex_unlock(&priv->mutex);
1288 IWL_DEBUG_MAC80211(priv, "leave\n");
1289
1290 return ret;
1291 }
1292
1293 void iwlagn_check_needed_chains(struct iwl_priv *priv,
1294 struct iwl_rxon_context *ctx,
1295 struct ieee80211_bss_conf *bss_conf)
1296 {
1297 struct ieee80211_vif *vif = ctx->vif;
1298 struct iwl_rxon_context *tmp;
1299 struct ieee80211_sta *sta;
1300 struct iwl_ht_config *ht_conf = &priv->current_ht_config;
1301 struct ieee80211_sta_ht_cap *ht_cap;
1302 bool need_multiple;
1303
1304 lockdep_assert_held(&priv->mutex);
1305
1306 switch (vif->type) {
1307 case NL80211_IFTYPE_STATION:
1308 rcu_read_lock();
1309 sta = ieee80211_find_sta(vif, bss_conf->bssid);
1310 if (!sta) {
1311 /*
1312 * If at all, this can only happen through a race
1313 * when the AP disconnects us while we're still
1314 * setting up the connection, in that case mac80211
1315 * will soon tell us about that.
1316 */
1317 need_multiple = false;
1318 rcu_read_unlock();
1319 break;
1320 }
1321
1322 ht_cap = &sta->ht_cap;
1323
1324 need_multiple = true;
1325
1326 /*
1327 * If the peer advertises no support for receiving 2 and 3
1328 * stream MCS rates, it can't be transmitting them either.
1329 */
1330 if (ht_cap->mcs.rx_mask[1] == 0 &&
1331 ht_cap->mcs.rx_mask[2] == 0) {
1332 need_multiple = false;
1333 } else if (!(ht_cap->mcs.tx_params &
1334 IEEE80211_HT_MCS_TX_DEFINED)) {
1335 /* If it can't TX MCS at all ... */
1336 need_multiple = false;
1337 } else if (ht_cap->mcs.tx_params &
1338 IEEE80211_HT_MCS_TX_RX_DIFF) {
1339 int maxstreams;
1340
1341 /*
1342 * But if it can receive them, it might still not
1343 * be able to transmit them, which is what we need
1344 * to check here -- so check the number of streams
1345 * it advertises for TX (if different from RX).
1346 */
1347
1348 maxstreams = (ht_cap->mcs.tx_params &
1349 IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK);
1350 maxstreams >>=
1351 IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT;
1352 maxstreams += 1;
1353
1354 if (maxstreams <= 1)
1355 need_multiple = false;
1356 }
1357
1358 rcu_read_unlock();
1359 break;
1360 case NL80211_IFTYPE_ADHOC:
1361 /* currently */
1362 need_multiple = false;
1363 break;
1364 default:
1365 /* only AP really */
1366 need_multiple = true;
1367 break;
1368 }
1369
1370 ctx->ht_need_multiple_chains = need_multiple;
1371
1372 if (!need_multiple) {
1373 /* check all contexts */
1374 for_each_context(priv, tmp) {
1375 if (!tmp->vif)
1376 continue;
1377 if (tmp->ht_need_multiple_chains) {
1378 need_multiple = true;
1379 break;
1380 }
1381 }
1382 }
1383
1384 ht_conf->single_chain_sufficient = !need_multiple;
1385 }
1386
1387 void iwlagn_chain_noise_reset(struct iwl_priv *priv)
1388 {
1389 struct iwl_chain_noise_data *data = &priv->chain_noise_data;
1390 int ret;
1391
1392 if (!(priv->calib_disabled & IWL_CHAIN_NOISE_CALIB_DISABLED))
1393 return;
1394
1395 if ((data->state == IWL_CHAIN_NOISE_ALIVE) &&
1396 iwl_is_any_associated(priv)) {
1397 struct iwl_calib_chain_noise_reset_cmd cmd;
1398
1399 /* clear data for chain noise calibration algorithm */
1400 data->chain_noise_a = 0;
1401 data->chain_noise_b = 0;
1402 data->chain_noise_c = 0;
1403 data->chain_signal_a = 0;
1404 data->chain_signal_b = 0;
1405 data->chain_signal_c = 0;
1406 data->beacon_count = 0;
1407
1408 memset(&cmd, 0, sizeof(cmd));
1409 iwl_set_calib_hdr(&cmd.hdr,
1410 priv->phy_calib_chain_noise_reset_cmd);
1411 ret = iwl_dvm_send_cmd_pdu(priv,
1412 REPLY_PHY_CALIBRATION_CMD,
1413 CMD_SYNC, sizeof(cmd), &cmd);
1414 if (ret)
1415 IWL_ERR(priv,
1416 "Could not send REPLY_PHY_CALIBRATION_CMD\n");
1417 data->state = IWL_CHAIN_NOISE_ACCUMULATE;
1418 IWL_DEBUG_CALIB(priv, "Run chain_noise_calibrate\n");
1419 }
1420 }
1421
1422 void iwlagn_bss_info_changed(struct ieee80211_hw *hw,
1423 struct ieee80211_vif *vif,
1424 struct ieee80211_bss_conf *bss_conf,
1425 u32 changes)
1426 {
1427 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1428 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1429 int ret;
1430 bool force = false;
1431
1432 mutex_lock(&priv->mutex);
1433
1434 if (unlikely(!iwl_is_ready(priv))) {
1435 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
1436 mutex_unlock(&priv->mutex);
1437 return;
1438 }
1439
1440 if (unlikely(!ctx->vif)) {
1441 IWL_DEBUG_MAC80211(priv, "leave - vif is NULL\n");
1442 mutex_unlock(&priv->mutex);
1443 return;
1444 }
1445
1446 if (changes & BSS_CHANGED_BEACON_INT)
1447 force = true;
1448
1449 if (changes & BSS_CHANGED_QOS) {
1450 ctx->qos_data.qos_active = bss_conf->qos;
1451 iwlagn_update_qos(priv, ctx);
1452 }
1453
1454 ctx->staging.assoc_id = cpu_to_le16(vif->bss_conf.aid);
1455 if (vif->bss_conf.use_short_preamble)
1456 ctx->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
1457 else
1458 ctx->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
1459
1460 if (changes & BSS_CHANGED_ASSOC) {
1461 if (bss_conf->assoc) {
1462 priv->timestamp = bss_conf->last_tsf;
1463 ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
1464 } else {
1465 /*
1466 * If we disassociate while there are pending
1467 * frames, just wake up the queues and let the
1468 * frames "escape" ... This shouldn't really
1469 * be happening to start with, but we should
1470 * not get stuck in this case either since it
1471 * can happen if userspace gets confused.
1472 */
1473 iwlagn_lift_passive_no_rx(priv);
1474
1475 ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
1476
1477 if (ctx->ctxid == IWL_RXON_CTX_BSS)
1478 priv->have_rekey_data = false;
1479 }
1480
1481 iwlagn_bt_coex_rssi_monitor(priv);
1482 }
1483
1484 if (ctx->ht.enabled) {
1485 ctx->ht.protection = bss_conf->ht_operation_mode &
1486 IEEE80211_HT_OP_MODE_PROTECTION;
1487 ctx->ht.non_gf_sta_present = !!(bss_conf->ht_operation_mode &
1488 IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT);
1489 iwlagn_check_needed_chains(priv, ctx, bss_conf);
1490 iwl_set_rxon_ht(priv, &priv->current_ht_config);
1491 }
1492
1493 iwlagn_set_rxon_chain(priv, ctx);
1494
1495 if (bss_conf->use_cts_prot && (priv->band != IEEE80211_BAND_5GHZ))
1496 ctx->staging.flags |= RXON_FLG_TGG_PROTECT_MSK;
1497 else
1498 ctx->staging.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
1499
1500 if (bss_conf->use_cts_prot)
1501 ctx->staging.flags |= RXON_FLG_SELF_CTS_EN;
1502 else
1503 ctx->staging.flags &= ~RXON_FLG_SELF_CTS_EN;
1504
1505 memcpy(ctx->staging.bssid_addr, bss_conf->bssid, ETH_ALEN);
1506
1507 if (vif->type == NL80211_IFTYPE_AP ||
1508 vif->type == NL80211_IFTYPE_ADHOC) {
1509 if (vif->bss_conf.enable_beacon) {
1510 ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
1511 priv->beacon_ctx = ctx;
1512 } else {
1513 ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
1514 priv->beacon_ctx = NULL;
1515 }
1516 }
1517
1518 /*
1519 * If the ucode decides to do beacon filtering before
1520 * association, it will lose beacons that are needed
1521 * before sending frames out on passive channels. This
1522 * causes association failures on those channels. Enable
1523 * receiving beacons in such cases.
1524 */
1525
1526 if (vif->type == NL80211_IFTYPE_STATION) {
1527 if (!bss_conf->assoc)
1528 ctx->staging.filter_flags |= RXON_FILTER_BCON_AWARE_MSK;
1529 else
1530 ctx->staging.filter_flags &=
1531 ~RXON_FILTER_BCON_AWARE_MSK;
1532 }
1533
1534 if (force || memcmp(&ctx->staging, &ctx->active, sizeof(ctx->staging)))
1535 iwlagn_commit_rxon(priv, ctx);
1536
1537 if (changes & BSS_CHANGED_ASSOC && bss_conf->assoc) {
1538 /*
1539 * The chain noise calibration will enable PM upon
1540 * completion. If calibration has already been run
1541 * then we need to enable power management here.
1542 */
1543 if (priv->chain_noise_data.state == IWL_CHAIN_NOISE_DONE)
1544 iwl_power_update_mode(priv, false);
1545
1546 /* Enable RX differential gain and sensitivity calibrations */
1547 iwlagn_chain_noise_reset(priv);
1548 priv->start_calib = 1;
1549 }
1550
1551 if (changes & BSS_CHANGED_IBSS) {
1552 ret = iwlagn_manage_ibss_station(priv, vif,
1553 bss_conf->ibss_joined);
1554 if (ret)
1555 IWL_ERR(priv, "failed to %s IBSS station %pM\n",
1556 bss_conf->ibss_joined ? "add" : "remove",
1557 bss_conf->bssid);
1558 }
1559
1560 if (changes & BSS_CHANGED_BEACON && vif->type == NL80211_IFTYPE_ADHOC &&
1561 priv->beacon_ctx) {
1562 if (iwlagn_update_beacon(priv, vif))
1563 IWL_ERR(priv, "Error sending IBSS beacon\n");
1564 }
1565
1566 mutex_unlock(&priv->mutex);
1567 }
1568
1569 void iwlagn_post_scan(struct iwl_priv *priv)
1570 {
1571 struct iwl_rxon_context *ctx;
1572
1573 /*
1574 * We do not commit power settings while scan is pending,
1575 * do it now if the settings changed.
1576 */
1577 iwl_power_set_mode(priv, &priv->power_data.sleep_cmd_next, false);
1578 iwl_set_tx_power(priv, priv->tx_power_next, false);
1579
1580 /*
1581 * Since setting the RXON may have been deferred while
1582 * performing the scan, fire one off if needed
1583 */
1584 for_each_context(priv, ctx)
1585 if (memcmp(&ctx->staging, &ctx->active, sizeof(ctx->staging)))
1586 iwlagn_commit_rxon(priv, ctx);
1587
1588 iwlagn_set_pan_params(priv);
1589 }
Linux kernel - Deliverables
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