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module: Convert symbol namespace to string literal
[linux.git] / drivers / net / wireless / intel / iwlwifi / dvm / rxon.c
blobf80cce37e2c00cf8685d1146ea97ee3328df17e7
1 // SPDX-License-Identifier: GPL-2.0-only
2 /******************************************************************************
3 *
4 * Copyright(c) 2003 - 2014 Intel Corporation. All rights reserved.
5 * Copyright(c) 2015 Intel Deutschland GmbH
6 *****************************************************************************/
7
8 #include <linux/etherdevice.h>
9 #include "iwl-trans.h"
10 #include "iwl-modparams.h"
11 #include "dev.h"
12 #include "agn.h"
13 #include "calib.h"
14
15 /*
16 * initialize rxon structure with default values from eeprom
17 */
18 void iwl_connection_init_rx_config(struct iwl_priv *priv,
19 struct iwl_rxon_context *ctx)
20 {
21 memset(&ctx->staging, 0, sizeof(ctx->staging));
22
23 if (!ctx->vif) {
24 ctx->staging.dev_type = ctx->unused_devtype;
25 } else
26 switch (ctx->vif->type) {
27 case NL80211_IFTYPE_AP:
28 ctx->staging.dev_type = ctx->ap_devtype;
29 break;
30
31 case NL80211_IFTYPE_STATION:
32 ctx->staging.dev_type = ctx->station_devtype;
33 ctx->staging.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
34 break;
35
36 case NL80211_IFTYPE_ADHOC:
37 ctx->staging.dev_type = ctx->ibss_devtype;
38 ctx->staging.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
39 ctx->staging.filter_flags = RXON_FILTER_BCON_AWARE_MSK |
40 RXON_FILTER_ACCEPT_GRP_MSK;
41 break;
42
43 case NL80211_IFTYPE_MONITOR:
44 ctx->staging.dev_type = RXON_DEV_TYPE_SNIFFER;
45 break;
46
47 default:
48 IWL_ERR(priv, "Unsupported interface type %d\n",
49 ctx->vif->type);
50 break;
51 }
52
53 #if 0
54 /* TODO: Figure out when short_preamble would be set and cache from
55 * that */
56 if (!hw_to_local(priv->hw)->short_preamble)
57 ctx->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
58 else
59 ctx->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
60 #endif
61
62 ctx->staging.channel =
63 cpu_to_le16(priv->hw->conf.chandef.chan->hw_value);
64 priv->band = priv->hw->conf.chandef.chan->band;
65
66 iwl_set_flags_for_band(priv, ctx, priv->band, ctx->vif);
67
68 /* clear both MIX and PURE40 mode flag */
69 ctx->staging.flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED |
70 RXON_FLG_CHANNEL_MODE_PURE_40);
71 if (ctx->vif)
72 memcpy(ctx->staging.node_addr, ctx->vif->addr, ETH_ALEN);
73
74 ctx->staging.ofdm_ht_single_stream_basic_rates = 0xff;
75 ctx->staging.ofdm_ht_dual_stream_basic_rates = 0xff;
76 ctx->staging.ofdm_ht_triple_stream_basic_rates = 0xff;
77 }
78
79 static int iwlagn_disable_bss(struct iwl_priv *priv,
80 struct iwl_rxon_context *ctx,
81 struct iwl_rxon_cmd *send)
82 {
83 __le32 old_filter = send->filter_flags;
84 int ret;
85
86 send->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
87 ret = iwl_dvm_send_cmd_pdu(priv, ctx->rxon_cmd,
88 0, sizeof(*send), send);
89
90 send->filter_flags = old_filter;
91
92 if (ret)
93 IWL_DEBUG_QUIET_RFKILL(priv,
94 "Error clearing ASSOC_MSK on BSS (%d)\n", ret);
95
96 return ret;
97 }
98
99 static int iwlagn_disable_pan(struct iwl_priv *priv,
100 struct iwl_rxon_context *ctx,
101 struct iwl_rxon_cmd *send)
102 {
103 struct iwl_notification_wait disable_wait;
104 __le32 old_filter = send->filter_flags;
105 u8 old_dev_type = send->dev_type;
106 int ret;
107 static const u16 deactivate_cmd[] = {
108 REPLY_WIPAN_DEACTIVATION_COMPLETE
109 };
110
111 iwl_init_notification_wait(&priv->notif_wait, &disable_wait,
112 deactivate_cmd, ARRAY_SIZE(deactivate_cmd),
113 NULL, NULL);
114
115 send->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
116 send->dev_type = RXON_DEV_TYPE_P2P;
117 ret = iwl_dvm_send_cmd_pdu(priv, ctx->rxon_cmd,
118 0, sizeof(*send), send);
119
120 send->filter_flags = old_filter;
121 send->dev_type = old_dev_type;
122
123 if (ret) {
124 IWL_ERR(priv, "Error disabling PAN (%d)\n", ret);
125 iwl_remove_notification(&priv->notif_wait, &disable_wait);
126 } else {
127 ret = iwl_wait_notification(&priv->notif_wait,
128 &disable_wait, HZ);
129 if (ret)
130 IWL_ERR(priv, "Timed out waiting for PAN disable\n");
131 }
132
133 return ret;
134 }
135
136 static int iwlagn_disconn_pan(struct iwl_priv *priv,
137 struct iwl_rxon_context *ctx,
138 struct iwl_rxon_cmd *send)
139 {
140 __le32 old_filter = send->filter_flags;
141 int ret;
142
143 send->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
144 ret = iwl_dvm_send_cmd_pdu(priv, ctx->rxon_cmd, 0,
145 sizeof(*send), send);
146
147 send->filter_flags = old_filter;
148
149 return ret;
150 }
151
152 static void iwlagn_update_qos(struct iwl_priv *priv,
153 struct iwl_rxon_context *ctx)
154 {
155 int ret;
156
157 if (!ctx->is_active)
158 return;
159
160 ctx->qos_data.def_qos_parm.qos_flags = 0;
161
162 if (ctx->qos_data.qos_active)
163 ctx->qos_data.def_qos_parm.qos_flags |=
164 QOS_PARAM_FLG_UPDATE_EDCA_MSK;
165
166 if (ctx->ht.enabled)
167 ctx->qos_data.def_qos_parm.qos_flags |= QOS_PARAM_FLG_TGN_MSK;
168
169 IWL_DEBUG_INFO(priv, "send QoS cmd with Qos active=%d FLAGS=0x%X\n",
170 ctx->qos_data.qos_active,
171 ctx->qos_data.def_qos_parm.qos_flags);
172
173 ret = iwl_dvm_send_cmd_pdu(priv, ctx->qos_cmd, 0,
174 sizeof(struct iwl_qosparam_cmd),
175 &ctx->qos_data.def_qos_parm);
176 if (ret)
177 IWL_DEBUG_QUIET_RFKILL(priv, "Failed to update QoS\n");
178 }
179
180 static int iwlagn_update_beacon(struct iwl_priv *priv,
181 struct ieee80211_vif *vif)
182 {
183 lockdep_assert_held(&priv->mutex);
184
185 dev_kfree_skb(priv->beacon_skb);
186 priv->beacon_skb = ieee80211_beacon_get(priv->hw, vif, 0);
187 if (!priv->beacon_skb)
188 return -ENOMEM;
189 return iwlagn_send_beacon_cmd(priv);
190 }
191
192 static int iwlagn_send_rxon_assoc(struct iwl_priv *priv,
193 struct iwl_rxon_context *ctx)
194 {
195 int ret = 0;
196 struct iwl_rxon_assoc_cmd rxon_assoc;
197 const struct iwl_rxon_cmd *rxon1 = &ctx->staging;
198 const struct iwl_rxon_cmd *rxon2 = &ctx->active;
199
200 if ((rxon1->flags == rxon2->flags) &&
201 (rxon1->filter_flags == rxon2->filter_flags) &&
202 (rxon1->cck_basic_rates == rxon2->cck_basic_rates) &&
203 (rxon1->ofdm_ht_single_stream_basic_rates ==
204 rxon2->ofdm_ht_single_stream_basic_rates) &&
205 (rxon1->ofdm_ht_dual_stream_basic_rates ==
206 rxon2->ofdm_ht_dual_stream_basic_rates) &&
207 (rxon1->ofdm_ht_triple_stream_basic_rates ==
208 rxon2->ofdm_ht_triple_stream_basic_rates) &&
209 (rxon1->acquisition_data == rxon2->acquisition_data) &&
210 (rxon1->rx_chain == rxon2->rx_chain) &&
211 (rxon1->ofdm_basic_rates == rxon2->ofdm_basic_rates)) {
212 IWL_DEBUG_INFO(priv, "Using current RXON_ASSOC. Not resending.\n");
213 return 0;
214 }
215
216 rxon_assoc.flags = ctx->staging.flags;
217 rxon_assoc.filter_flags = ctx->staging.filter_flags;
218 rxon_assoc.ofdm_basic_rates = ctx->staging.ofdm_basic_rates;
219 rxon_assoc.cck_basic_rates = ctx->staging.cck_basic_rates;
220 rxon_assoc.reserved1 = 0;
221 rxon_assoc.reserved2 = 0;
222 rxon_assoc.reserved3 = 0;
223 rxon_assoc.ofdm_ht_single_stream_basic_rates =
224 ctx->staging.ofdm_ht_single_stream_basic_rates;
225 rxon_assoc.ofdm_ht_dual_stream_basic_rates =
226 ctx->staging.ofdm_ht_dual_stream_basic_rates;
227 rxon_assoc.rx_chain_select_flags = ctx->staging.rx_chain;
228 rxon_assoc.ofdm_ht_triple_stream_basic_rates =
229 ctx->staging.ofdm_ht_triple_stream_basic_rates;
230 rxon_assoc.acquisition_data = ctx->staging.acquisition_data;
231
232 ret = iwl_dvm_send_cmd_pdu(priv, ctx->rxon_assoc_cmd,
233 CMD_ASYNC, sizeof(rxon_assoc), &rxon_assoc);
234 return ret;
235 }
236
237 static u16 iwl_adjust_beacon_interval(u16 beacon_val, u16 max_beacon_val)
238 {
239 u16 new_val;
240 u16 beacon_factor;
241
242 /*
243 * If mac80211 hasn't given us a beacon interval, program
244 * the default into the device (not checking this here
245 * would cause the adjustment below to return the maximum
246 * value, which may break PAN.)
247 */
248 if (!beacon_val)
249 return DEFAULT_BEACON_INTERVAL;
250
251 /*
252 * If the beacon interval we obtained from the peer
253 * is too large, we'll have to wake up more often
254 * (and in IBSS case, we'll beacon too much)
255 *
256 * For example, if max_beacon_val is 4096, and the
257 * requested beacon interval is 7000, we'll have to
258 * use 3500 to be able to wake up on the beacons.
259 *
260 * This could badly influence beacon detection stats.
261 */
262
263 beacon_factor = (beacon_val + max_beacon_val) / max_beacon_val;
264 new_val = beacon_val / beacon_factor;
265
266 if (!new_val)
267 new_val = max_beacon_val;
268
269 return new_val;
270 }
271
272 static int iwl_send_rxon_timing(struct iwl_priv *priv,
273 struct iwl_rxon_context *ctx)
274 {
275 u64 tsf;
276 s32 interval_tm, rem;
277 struct ieee80211_conf *conf = NULL;
278 u16 beacon_int;
279 struct ieee80211_vif *vif = ctx->vif;
280
281 conf = &priv->hw->conf;
282
283 lockdep_assert_held(&priv->mutex);
284
285 memset(&ctx->timing, 0, sizeof(struct iwl_rxon_time_cmd));
286
287 ctx->timing.timestamp = cpu_to_le64(priv->timestamp);
288 ctx->timing.listen_interval = cpu_to_le16(conf->listen_interval);
289
290 beacon_int = vif ? vif->bss_conf.beacon_int : 0;
291
292 /*
293 * TODO: For IBSS we need to get atim_window from mac80211,
294 * for now just always use 0
295 */
296 ctx->timing.atim_window = 0;
297
298 if (ctx->ctxid == IWL_RXON_CTX_PAN &&
299 (!ctx->vif || ctx->vif->type != NL80211_IFTYPE_STATION) &&
300 iwl_is_associated(priv, IWL_RXON_CTX_BSS) &&
301 priv->contexts[IWL_RXON_CTX_BSS].vif &&
302 priv->contexts[IWL_RXON_CTX_BSS].vif->bss_conf.beacon_int) {
303 ctx->timing.beacon_interval =
304 priv->contexts[IWL_RXON_CTX_BSS].timing.beacon_interval;
305 beacon_int = le16_to_cpu(ctx->timing.beacon_interval);
306 } else if (ctx->ctxid == IWL_RXON_CTX_BSS &&
307 iwl_is_associated(priv, IWL_RXON_CTX_PAN) &&
308 priv->contexts[IWL_RXON_CTX_PAN].vif &&
309 priv->contexts[IWL_RXON_CTX_PAN].vif->bss_conf.beacon_int &&
310 (!iwl_is_associated_ctx(ctx) || !ctx->vif ||
311 !ctx->vif->bss_conf.beacon_int)) {
312 ctx->timing.beacon_interval =
313 priv->contexts[IWL_RXON_CTX_PAN].timing.beacon_interval;
314 beacon_int = le16_to_cpu(ctx->timing.beacon_interval);
315 } else {
316 beacon_int = iwl_adjust_beacon_interval(beacon_int,
317 IWL_MAX_UCODE_BEACON_INTERVAL * TIME_UNIT);
318 ctx->timing.beacon_interval = cpu_to_le16(beacon_int);
319 }
320
321 ctx->beacon_int = beacon_int;
322
323 tsf = priv->timestamp; /* tsf is modifed by do_div: copy it */
324 interval_tm = beacon_int * TIME_UNIT;
325 rem = do_div(tsf, interval_tm);
326 ctx->timing.beacon_init_val = cpu_to_le32(interval_tm - rem);
327
328 ctx->timing.dtim_period = vif ? (vif->bss_conf.dtim_period ?: 1) : 1;
329
330 IWL_DEBUG_ASSOC(priv,
331 "beacon interval %d beacon timer %d beacon tim %d\n",
332 le16_to_cpu(ctx->timing.beacon_interval),
333 le32_to_cpu(ctx->timing.beacon_init_val),
334 le16_to_cpu(ctx->timing.atim_window));
335
336 return iwl_dvm_send_cmd_pdu(priv, ctx->rxon_timing_cmd,
337 0, sizeof(ctx->timing), &ctx->timing);
338 }
339
340 static int iwlagn_rxon_disconn(struct iwl_priv *priv,
341 struct iwl_rxon_context *ctx)
342 {
343 int ret;
344 struct iwl_rxon_cmd *active = (void *)&ctx->active;
345
346 if (ctx->ctxid == IWL_RXON_CTX_BSS) {
347 ret = iwlagn_disable_bss(priv, ctx, &ctx->staging);
348 } else {
349 ret = iwlagn_disable_pan(priv, ctx, &ctx->staging);
350 if (ret)
351 return ret;
352 if (ctx->vif) {
353 ret = iwl_send_rxon_timing(priv, ctx);
354 if (ret) {
355 IWL_ERR(priv, "Failed to send timing (%d)!\n", ret);
356 return ret;
357 }
358 ret = iwlagn_disconn_pan(priv, ctx, &ctx->staging);
359 }
360 }
361 if (ret)
362 return ret;
363
364 /*
365 * Un-assoc RXON clears the station table and WEP
366 * keys, so we have to restore those afterwards.
367 */
368 iwl_clear_ucode_stations(priv, ctx);
369 /* update -- might need P2P now */
370 iwl_update_bcast_station(priv, ctx);
371 iwl_restore_stations(priv, ctx);
372 ret = iwl_restore_default_wep_keys(priv, ctx);
373 if (ret) {
374 IWL_ERR(priv, "Failed to restore WEP keys (%d)\n", ret);
375 return ret;
376 }
377
378 memcpy(active, &ctx->staging, sizeof(*active));
379 return 0;
380 }
381
382 static int iwl_set_tx_power(struct iwl_priv *priv, s8 tx_power, bool force)
383 {
384 int ret;
385 s8 prev_tx_power;
386 bool defer;
387 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
388
389 if (priv->calib_disabled & IWL_TX_POWER_CALIB_DISABLED)
390 return 0;
391
392 lockdep_assert_held(&priv->mutex);
393
394 if (priv->tx_power_user_lmt == tx_power && !force)
395 return 0;
396
397 if (tx_power < IWLAGN_TX_POWER_TARGET_POWER_MIN) {
398 IWL_WARN(priv,
399 "Requested user TXPOWER %d below lower limit %d.\n",
400 tx_power,
401 IWLAGN_TX_POWER_TARGET_POWER_MIN);
402 return -EINVAL;
403 }
404
405 if (tx_power > DIV_ROUND_UP(priv->nvm_data->max_tx_pwr_half_dbm, 2)) {
406 IWL_WARN(priv,
407 "Requested user TXPOWER %d above upper limit %d.\n",
408 tx_power, priv->nvm_data->max_tx_pwr_half_dbm);
409 return -EINVAL;
410 }
411
412 if (!iwl_is_ready_rf(priv))
413 return -EIO;
414
415 /* scan complete and commit_rxon use tx_power_next value,
416 * it always need to be updated for newest request */
417 priv->tx_power_next = tx_power;
418
419 /* do not set tx power when scanning or channel changing */
420 defer = test_bit(STATUS_SCANNING, &priv->status) ||
421 memcmp(&ctx->active, &ctx->staging, sizeof(ctx->staging));
422 if (defer && !force) {
423 IWL_DEBUG_INFO(priv, "Deferring tx power set\n");
424 return 0;
425 }
426
427 prev_tx_power = priv->tx_power_user_lmt;
428 priv->tx_power_user_lmt = tx_power;
429
430 ret = iwlagn_send_tx_power(priv);
431
432 /* if fail to set tx_power, restore the orig. tx power */
433 if (ret) {
434 priv->tx_power_user_lmt = prev_tx_power;
435 priv->tx_power_next = prev_tx_power;
436 }
437 return ret;
438 }
439
440 static int iwlagn_rxon_connect(struct iwl_priv *priv,
441 struct iwl_rxon_context *ctx)
442 {
443 int ret;
444 struct iwl_rxon_cmd *active = (void *)&ctx->active;
445
446 /* RXON timing must be before associated RXON */
447 if (ctx->ctxid == IWL_RXON_CTX_BSS) {
448 ret = iwl_send_rxon_timing(priv, ctx);
449 if (ret) {
450 IWL_ERR(priv, "Failed to send timing (%d)!\n", ret);
451 return ret;
452 }
453 }
454 /* QoS info may be cleared by previous un-assoc RXON */
455 iwlagn_update_qos(priv, ctx);
456
457 /*
458 * We'll run into this code path when beaconing is
459 * enabled, but then we also need to send the beacon
460 * to the device.
461 */
462 if (ctx->vif && (ctx->vif->type == NL80211_IFTYPE_AP)) {
463 ret = iwlagn_update_beacon(priv, ctx->vif);
464 if (ret) {
465 IWL_ERR(priv,
466 "Error sending required beacon (%d)!\n",
467 ret);
468 return ret;
469 }
470 }
471
472 priv->start_calib = 0;
473 /*
474 * Apply the new configuration.
475 *
476 * Associated RXON doesn't clear the station table in uCode,
477 * so we don't need to restore stations etc. after this.
478 */
479 ret = iwl_dvm_send_cmd_pdu(priv, ctx->rxon_cmd, 0,
480 sizeof(struct iwl_rxon_cmd), &ctx->staging);
481 if (ret) {
482 IWL_ERR(priv, "Error setting new RXON (%d)\n", ret);
483 return ret;
484 }
485 memcpy(active, &ctx->staging, sizeof(*active));
486
487 /* IBSS beacon needs to be sent after setting assoc */
488 if (ctx->vif && (ctx->vif->type == NL80211_IFTYPE_ADHOC))
489 if (iwlagn_update_beacon(priv, ctx->vif))
490 IWL_ERR(priv, "Error sending IBSS beacon\n");
491 iwl_init_sensitivity(priv);
492
493 /*
494 * If we issue a new RXON command which required a tune then
495 * we must send a new TXPOWER command or we won't be able to
496 * Tx any frames.
497 *
498 * It's expected we set power here if channel is changing.
499 */
500 ret = iwl_set_tx_power(priv, priv->tx_power_next, true);
501 if (ret) {
502 IWL_ERR(priv, "Error sending TX power (%d)\n", ret);
503 return ret;
504 }
505
506 return 0;
507 }
508
509 int iwlagn_set_pan_params(struct iwl_priv *priv)
510 {
511 struct iwl_wipan_params_cmd cmd;
512 struct iwl_rxon_context *ctx_bss, *ctx_pan;
513 int slot0 = 300, slot1 = 0;
514 int ret;
515
516 if (priv->valid_contexts == BIT(IWL_RXON_CTX_BSS))
517 return 0;
518
519 BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
520
521 lockdep_assert_held(&priv->mutex);
522
523 ctx_bss = &priv->contexts[IWL_RXON_CTX_BSS];
524 ctx_pan = &priv->contexts[IWL_RXON_CTX_PAN];
525
526 /*
527 * If the PAN context is inactive, then we don't need
528 * to update the PAN parameters, the last thing we'll
529 * have done before it goes inactive is making the PAN
530 * parameters be WLAN-only.
531 */
532 if (!ctx_pan->is_active)
533 return 0;
534
535 memset(&cmd, 0, sizeof(cmd));
536
537 /* only 2 slots are currently allowed */
538 cmd.num_slots = 2;
539
540 cmd.slots[0].type = 0; /* BSS */
541 cmd.slots[1].type = 1; /* PAN */
542
543 if (ctx_bss->vif && ctx_pan->vif) {
544 int bcnint = ctx_pan->beacon_int;
545 int dtim = ctx_pan->vif->bss_conf.dtim_period ?: 1;
546
547 /* should be set, but seems unused?? */
548 cmd.flags |= cpu_to_le16(IWL_WIPAN_PARAMS_FLG_SLOTTED_MODE);
549
550 if (ctx_pan->vif->type == NL80211_IFTYPE_AP &&
551 bcnint &&
552 bcnint != ctx_bss->beacon_int) {
553 IWL_ERR(priv,
554 "beacon intervals don't match (%d, %d)\n",
555 ctx_bss->beacon_int, ctx_pan->beacon_int);
556 } else
557 bcnint = max_t(int, bcnint,
558 ctx_bss->beacon_int);
559 if (!bcnint)
560 bcnint = DEFAULT_BEACON_INTERVAL;
561 slot0 = bcnint / 2;
562 slot1 = bcnint - slot0;
563
564 if (test_bit(STATUS_SCAN_HW, &priv->status) ||
565 (!ctx_bss->vif->cfg.idle &&
566 !ctx_bss->vif->cfg.assoc)) {
567 slot0 = dtim * bcnint * 3 - IWL_MIN_SLOT_TIME;
568 slot1 = IWL_MIN_SLOT_TIME;
569 } else if (!ctx_pan->vif->cfg.idle &&
570 !ctx_pan->vif->cfg.assoc) {
571 slot1 = dtim * bcnint * 3 - IWL_MIN_SLOT_TIME;
572 slot0 = IWL_MIN_SLOT_TIME;
573 }
574 } else if (ctx_pan->vif) {
575 slot0 = 0;
576 slot1 = max_t(int, 1, ctx_pan->vif->bss_conf.dtim_period) *
577 ctx_pan->beacon_int;
578 slot1 = max_t(int, DEFAULT_BEACON_INTERVAL, slot1);
579
580 if (test_bit(STATUS_SCAN_HW, &priv->status)) {
581 slot0 = slot1 * 3 - IWL_MIN_SLOT_TIME;
582 slot1 = IWL_MIN_SLOT_TIME;
583 }
584 }
585
586 cmd.slots[0].width = cpu_to_le16(slot0);
587 cmd.slots[1].width = cpu_to_le16(slot1);
588
589 ret = iwl_dvm_send_cmd_pdu(priv, REPLY_WIPAN_PARAMS, 0,
590 sizeof(cmd), &cmd);
591 if (ret)
592 IWL_ERR(priv, "Error setting PAN parameters (%d)\n", ret);
593
594 return ret;
595 }
596
597 static void _iwl_set_rxon_ht(struct iwl_priv *priv,
598 struct iwl_ht_config *ht_conf,
599 struct iwl_rxon_context *ctx)
600 {
601 struct iwl_rxon_cmd *rxon = &ctx->staging;
602
603 if (!ctx->ht.enabled) {
604 rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |
605 RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK |
606 RXON_FLG_HT40_PROT_MSK |
607 RXON_FLG_HT_PROT_MSK);
608 return;
609 }
610
611 /* FIXME: if the definition of ht.protection changed, the "translation"
612 * will be needed for rxon->flags
613 */
614 rxon->flags |= cpu_to_le32(ctx->ht.protection <<
615 RXON_FLG_HT_OPERATING_MODE_POS);
616
617 /* Set up channel bandwidth:
618 * 20 MHz only, 20/40 mixed or pure 40 if ht40 ok */
619 /* clear the HT channel mode before set the mode */
620 rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |
621 RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
622 if (iwl_is_ht40_tx_allowed(priv, ctx, NULL)) {
623 /* pure ht40 */
624 if (ctx->ht.protection ==
625 IEEE80211_HT_OP_MODE_PROTECTION_20MHZ) {
626 rxon->flags |= RXON_FLG_CHANNEL_MODE_PURE_40;
627 /*
628 * Note: control channel is opposite of extension
629 * channel
630 */
631 switch (ctx->ht.extension_chan_offset) {
632 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
633 rxon->flags &=
634 ~RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
635 break;
636 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
637 rxon->flags |=
638 RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
639 break;
640 }
641 } else {
642 /*
643 * Note: control channel is opposite of extension
644 * channel
645 */
646 switch (ctx->ht.extension_chan_offset) {
647 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
648 rxon->flags &=
649 ~(RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
650 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
651 break;
652 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
653 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
654 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
655 break;
656 case IEEE80211_HT_PARAM_CHA_SEC_NONE:
657 default:
658 /*
659 * channel location only valid if in Mixed
660 * mode
661 */
662 IWL_ERR(priv,
663 "invalid extension channel offset\n");
664 break;
665 }
666 }
667 } else {
668 rxon->flags |= RXON_FLG_CHANNEL_MODE_LEGACY;
669 }
670
671 iwlagn_set_rxon_chain(priv, ctx);
672
673 IWL_DEBUG_ASSOC(priv, "rxon flags 0x%X operation mode :0x%X "
674 "extension channel offset 0x%x\n",
675 le32_to_cpu(rxon->flags), ctx->ht.protection,
676 ctx->ht.extension_chan_offset);
677 }
678
679 void iwl_set_rxon_ht(struct iwl_priv *priv, struct iwl_ht_config *ht_conf)
680 {
681 struct iwl_rxon_context *ctx;
682
683 for_each_context(priv, ctx)
684 _iwl_set_rxon_ht(priv, ht_conf, ctx);
685 }
686
687 /*
688 * iwl_set_rxon_channel - Set the band and channel values in staging RXON
689 * @ch: requested channel as a pointer to struct ieee80211_channel
690
691 * NOTE: Does not commit to the hardware; it sets appropriate bit fields
692 * in the staging RXON flag structure based on the ch->band
693 */
694 void iwl_set_rxon_channel(struct iwl_priv *priv, struct ieee80211_channel *ch,
695 struct iwl_rxon_context *ctx)
696 {
697 enum nl80211_band band = ch->band;
698 u16 channel = ch->hw_value;
699
700 if ((le16_to_cpu(ctx->staging.channel) == channel) &&
701 (priv->band == band))
702 return;
703
704 ctx->staging.channel = cpu_to_le16(channel);
705 if (band == NL80211_BAND_5GHZ)
706 ctx->staging.flags &= ~RXON_FLG_BAND_24G_MSK;
707 else
708 ctx->staging.flags |= RXON_FLG_BAND_24G_MSK;
709
710 priv->band = band;
711
712 IWL_DEBUG_INFO(priv, "Staging channel set to %d [%d]\n", channel, band);
713
714 }
715
716 void iwl_set_flags_for_band(struct iwl_priv *priv,
717 struct iwl_rxon_context *ctx,
718 enum nl80211_band band,
719 struct ieee80211_vif *vif)
720 {
721 if (band == NL80211_BAND_5GHZ) {
722 ctx->staging.flags &=
723 ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK
724 | RXON_FLG_CCK_MSK);
725 ctx->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
726 } else {
727 /* Copied from iwl_post_associate() */
728 if (vif && vif->bss_conf.use_short_slot)
729 ctx->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
730 else
731 ctx->staging.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
732
733 ctx->staging.flags |= RXON_FLG_BAND_24G_MSK;
734 ctx->staging.flags |= RXON_FLG_AUTO_DETECT_MSK;
735 ctx->staging.flags &= ~RXON_FLG_CCK_MSK;
736 }
737 }
738
739 static void iwl_set_rxon_hwcrypto(struct iwl_priv *priv,
740 struct iwl_rxon_context *ctx, int hw_decrypt)
741 {
742 struct iwl_rxon_cmd *rxon = &ctx->staging;
743
744 if (hw_decrypt)
745 rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
746 else
747 rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;
748
749 }
750
751 /* validate RXON structure is valid */
752 static int iwl_check_rxon_cmd(struct iwl_priv *priv,
753 struct iwl_rxon_context *ctx)
754 {
755 struct iwl_rxon_cmd *rxon = &ctx->staging;
756 u32 errors = 0;
757
758 if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
759 if (rxon->flags & RXON_FLG_TGJ_NARROW_BAND_MSK) {
760 IWL_WARN(priv, "check 2.4G: wrong narrow\n");
761 errors |= BIT(0);
762 }
763 if (rxon->flags & RXON_FLG_RADAR_DETECT_MSK) {
764 IWL_WARN(priv, "check 2.4G: wrong radar\n");
765 errors |= BIT(1);
766 }
767 } else {
768 if (!(rxon->flags & RXON_FLG_SHORT_SLOT_MSK)) {
769 IWL_WARN(priv, "check 5.2G: not short slot!\n");
770 errors |= BIT(2);
771 }
772 if (rxon->flags & RXON_FLG_CCK_MSK) {
773 IWL_WARN(priv, "check 5.2G: CCK!\n");
774 errors |= BIT(3);
775 }
776 }
777 if ((rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1) {
778 IWL_WARN(priv, "mac/bssid mcast!\n");
779 errors |= BIT(4);
780 }
781
782 /* make sure basic rates 6Mbps and 1Mbps are supported */
783 if ((rxon->ofdm_basic_rates & IWL_RATE_6M_MASK) == 0 &&
784 (rxon->cck_basic_rates & IWL_RATE_1M_MASK) == 0) {
785 IWL_WARN(priv, "neither 1 nor 6 are basic\n");
786 errors |= BIT(5);
787 }
788
789 if (le16_to_cpu(rxon->assoc_id) > 2007) {
790 IWL_WARN(priv, "aid > 2007\n");
791 errors |= BIT(6);
792 }
793
794 if ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK))
795 == (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK)) {
796 IWL_WARN(priv, "CCK and short slot\n");
797 errors |= BIT(7);
798 }
799
800 if ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK))
801 == (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK)) {
802 IWL_WARN(priv, "CCK and auto detect\n");
803 errors |= BIT(8);
804 }
805
806 if ((rxon->flags & (RXON_FLG_AUTO_DETECT_MSK |
807 RXON_FLG_TGG_PROTECT_MSK)) ==
808 RXON_FLG_TGG_PROTECT_MSK) {
809 IWL_WARN(priv, "TGg but no auto-detect\n");
810 errors |= BIT(9);
811 }
812
813 if (rxon->channel == 0) {
814 IWL_WARN(priv, "zero channel is invalid\n");
815 errors |= BIT(10);
816 }
817
818 WARN(errors, "Invalid RXON (%#x), channel %d",
819 errors, le16_to_cpu(rxon->channel));
820
821 return errors ? -EINVAL : 0;
822 }
823
824 /*
825 * iwl_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed
826 * @priv: staging_rxon is compared to active_rxon
827 *
828 * If the RXON structure is changing enough to require a new tune,
829 * or is clearing the RXON_FILTER_ASSOC_MSK, then return 1 to indicate that
830 * a new tune (full RXON command, rather than RXON_ASSOC cmd) is required.
831 */
832 static int iwl_full_rxon_required(struct iwl_priv *priv,
833 struct iwl_rxon_context *ctx)
834 {
835 const struct iwl_rxon_cmd *staging = &ctx->staging;
836 const struct iwl_rxon_cmd *active = &ctx->active;
837
838 #define CHK(cond) \
839 if ((cond)) { \
840 IWL_DEBUG_INFO(priv, "need full RXON - " #cond "\n"); \
841 return 1; \
842 }
843
844 #define CHK_NEQ(c1, c2) \
845 if ((c1) != (c2)) { \
846 IWL_DEBUG_INFO(priv, "need full RXON - " \
847 #c1 " != " #c2 " - %d != %d\n", \
848 (c1), (c2)); \
849 return 1; \
850 }
851
852 /* These items are only settable from the full RXON command */
853 CHK(!iwl_is_associated_ctx(ctx));
854 CHK(!ether_addr_equal(staging->bssid_addr, active->bssid_addr));
855 CHK(!ether_addr_equal(staging->node_addr, active->node_addr));
856 CHK(!ether_addr_equal(staging->wlap_bssid_addr,
857 active->wlap_bssid_addr));
858 CHK_NEQ(staging->dev_type, active->dev_type);
859 CHK_NEQ(staging->channel, active->channel);
860 CHK_NEQ(staging->air_propagation, active->air_propagation);
861 CHK_NEQ(staging->ofdm_ht_single_stream_basic_rates,
862 active->ofdm_ht_single_stream_basic_rates);
863 CHK_NEQ(staging->ofdm_ht_dual_stream_basic_rates,
864 active->ofdm_ht_dual_stream_basic_rates);
865 CHK_NEQ(staging->ofdm_ht_triple_stream_basic_rates,
866 active->ofdm_ht_triple_stream_basic_rates);
867 CHK_NEQ(staging->assoc_id, active->assoc_id);
868
869 /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
870 * be updated with the RXON_ASSOC command -- however only some
871 * flag transitions are allowed using RXON_ASSOC */
872
873 /* Check if we are not switching bands */
874 CHK_NEQ(staging->flags & RXON_FLG_BAND_24G_MSK,
875 active->flags & RXON_FLG_BAND_24G_MSK);
876
877 /* Check if we are switching association toggle */
878 CHK_NEQ(staging->filter_flags & RXON_FILTER_ASSOC_MSK,
879 active->filter_flags & RXON_FILTER_ASSOC_MSK);
880
881 #undef CHK
882 #undef CHK_NEQ
883
884 return 0;
885 }
886
887 #ifdef CONFIG_IWLWIFI_DEBUG
888 void iwl_print_rx_config_cmd(struct iwl_priv *priv,
889 enum iwl_rxon_context_id ctxid)
890 {
891 struct iwl_rxon_context *ctx = &priv->contexts[ctxid];
892 struct iwl_rxon_cmd *rxon = &ctx->staging;
893
894 IWL_DEBUG_RADIO(priv, "RX CONFIG:\n");
895 iwl_print_hex_dump(priv, IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
896 IWL_DEBUG_RADIO(priv, "u16 channel: 0x%x\n",
897 le16_to_cpu(rxon->channel));
898 IWL_DEBUG_RADIO(priv, "u32 flags: 0x%08X\n",
899 le32_to_cpu(rxon->flags));
900 IWL_DEBUG_RADIO(priv, "u32 filter_flags: 0x%08x\n",
901 le32_to_cpu(rxon->filter_flags));
902 IWL_DEBUG_RADIO(priv, "u8 dev_type: 0x%x\n", rxon->dev_type);
903 IWL_DEBUG_RADIO(priv, "u8 ofdm_basic_rates: 0x%02x\n",
904 rxon->ofdm_basic_rates);
905 IWL_DEBUG_RADIO(priv, "u8 cck_basic_rates: 0x%02x\n",
906 rxon->cck_basic_rates);
907 IWL_DEBUG_RADIO(priv, "u8[6] node_addr: %pM\n", rxon->node_addr);
908 IWL_DEBUG_RADIO(priv, "u8[6] bssid_addr: %pM\n", rxon->bssid_addr);
909 IWL_DEBUG_RADIO(priv, "u16 assoc_id: 0x%x\n",
910 le16_to_cpu(rxon->assoc_id));
911 }
912 #endif
913
914 static void iwl_calc_basic_rates(struct iwl_priv *priv,
915 struct iwl_rxon_context *ctx)
916 {
917 int lowest_present_ofdm = 100;
918 int lowest_present_cck = 100;
919 u8 cck = 0;
920 u8 ofdm = 0;
921
922 if (ctx->vif) {
923 struct ieee80211_supported_band *sband;
924 unsigned long basic = ctx->vif->bss_conf.basic_rates;
925 int i;
926
927 sband = priv->hw->wiphy->bands[priv->hw->conf.chandef.chan->band];
928
929 for_each_set_bit(i, &basic, BITS_PER_LONG) {
930 int hw = sband->bitrates[i].hw_value;
931 if (hw >= IWL_FIRST_OFDM_RATE) {
932 ofdm |= BIT(hw - IWL_FIRST_OFDM_RATE);
933 if (lowest_present_ofdm > hw)
934 lowest_present_ofdm = hw;
935 } else {
936 BUILD_BUG_ON(IWL_FIRST_CCK_RATE != 0);
937
938 cck |= BIT(hw);
939 if (lowest_present_cck > hw)
940 lowest_present_cck = hw;
941 }
942 }
943 }
944
945 /*
946 * Now we've got the basic rates as bitmaps in the ofdm and cck
947 * variables. This isn't sufficient though, as there might not
948 * be all the right rates in the bitmap. E.g. if the only basic
949 * rates are 5.5 Mbps and 11 Mbps, we still need to add 1 Mbps
950 * and 6 Mbps because the 802.11-2007 standard says in 9.6:
951 *
952 * [...] a STA responding to a received frame shall transmit
953 * its Control Response frame [...] at the highest rate in the
954 * BSSBasicRateSet parameter that is less than or equal to the
955 * rate of the immediately previous frame in the frame exchange
956 * sequence ([...]) and that is of the same modulation class
957 * ([...]) as the received frame. If no rate contained in the
958 * BSSBasicRateSet parameter meets these conditions, then the
959 * control frame sent in response to a received frame shall be
960 * transmitted at the highest mandatory rate of the PHY that is
961 * less than or equal to the rate of the received frame, and
962 * that is of the same modulation class as the received frame.
963 *
964 * As a consequence, we need to add all mandatory rates that are
965 * lower than all of the basic rates to these bitmaps.
966 */
967
968 if (IWL_RATE_24M_INDEX < lowest_present_ofdm)
969 ofdm |= IWL_RATE_24M_MASK >> IWL_FIRST_OFDM_RATE;
970 if (IWL_RATE_12M_INDEX < lowest_present_ofdm)
971 ofdm |= IWL_RATE_12M_MASK >> IWL_FIRST_OFDM_RATE;
972 /* 6M already there or needed so always add */
973 ofdm |= IWL_RATE_6M_MASK >> IWL_FIRST_OFDM_RATE;
974
975 /*
976 * CCK is a bit more complex with DSSS vs. HR/DSSS vs. ERP.
977 * Note, however:
978 * - if no CCK rates are basic, it must be ERP since there must
979 * be some basic rates at all, so they're OFDM => ERP PHY
980 * (or we're in 5 GHz, and the cck bitmap will never be used)
981 * - if 11M is a basic rate, it must be ERP as well, so add 5.5M
982 * - if 5.5M is basic, 1M and 2M are mandatory
983 * - if 2M is basic, 1M is mandatory
984 * - if 1M is basic, that's the only valid ACK rate.
985 * As a consequence, it's not as complicated as it sounds, just add
986 * any lower rates to the ACK rate bitmap.
987 */
988 if (IWL_RATE_11M_INDEX < lowest_present_cck)
989 cck |= IWL_RATE_11M_MASK >> IWL_FIRST_CCK_RATE;
990 if (IWL_RATE_5M_INDEX < lowest_present_cck)
991 cck |= IWL_RATE_5M_MASK >> IWL_FIRST_CCK_RATE;
992 if (IWL_RATE_2M_INDEX < lowest_present_cck)
993 cck |= IWL_RATE_2M_MASK >> IWL_FIRST_CCK_RATE;
994 /* 1M already there or needed so always add */
995 cck |= IWL_RATE_1M_MASK >> IWL_FIRST_CCK_RATE;
996
997 IWL_DEBUG_RATE(priv, "Set basic rates cck:0x%.2x ofdm:0x%.2x\n",
998 cck, ofdm);
999
1000 /* "basic_rates" is a misnomer here -- should be called ACK rates */
1001 ctx->staging.cck_basic_rates = cck;
1002 ctx->staging.ofdm_basic_rates = ofdm;
1003 }
1004
1005 /*
1006 * iwlagn_commit_rxon - commit staging_rxon to hardware
1007 *
1008 * The RXON command in staging_rxon is committed to the hardware and
1009 * the active_rxon structure is updated with the new data. This
1010 * function correctly transitions out of the RXON_ASSOC_MSK state if
1011 * a HW tune is required based on the RXON structure changes.
1012 *
1013 * The connect/disconnect flow should be as the following:
1014 *
1015 * 1. make sure send RXON command with association bit unset if not connect
1016 * this should include the channel and the band for the candidate
1017 * to be connected to
1018 * 2. Add Station before RXON association with the AP
1019 * 3. RXON_timing has to send before RXON for connection
1020 * 4. full RXON command - associated bit set
1021 * 5. use RXON_ASSOC command to update any flags changes
1022 */
1023 int iwlagn_commit_rxon(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
1024 {
1025 /* cast away the const for active_rxon in this function */
1026 struct iwl_rxon_cmd *active = (void *)&ctx->active;
1027 bool new_assoc = !!(ctx->staging.filter_flags & RXON_FILTER_ASSOC_MSK);
1028 int ret;
1029
1030 lockdep_assert_held(&priv->mutex);
1031
1032 if (!iwl_is_alive(priv))
1033 return -EBUSY;
1034
1035 /* This function hardcodes a bunch of dual-mode assumptions */
1036 BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
1037
1038 if (!ctx->is_active)
1039 return 0;
1040
1041 /* always get timestamp with Rx frame */
1042 ctx->staging.flags |= RXON_FLG_TSF2HOST_MSK;
1043
1044 /* recalculate basic rates */
1045 iwl_calc_basic_rates(priv, ctx);
1046
1047 /*
1048 * force CTS-to-self frames protection if RTS-CTS is not preferred
1049 * one aggregation protection method
1050 */
1051 if (!priv->hw_params.use_rts_for_aggregation)
1052 ctx->staging.flags |= RXON_FLG_SELF_CTS_EN;
1053
1054 if ((ctx->vif && ctx->vif->bss_conf.use_short_slot) ||
1055 !(ctx->staging.flags & RXON_FLG_BAND_24G_MSK))
1056 ctx->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
1057 else
1058 ctx->staging.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
1059
1060 iwl_print_rx_config_cmd(priv, ctx->ctxid);
1061 ret = iwl_check_rxon_cmd(priv, ctx);
1062 if (ret) {
1063 IWL_ERR(priv, "Invalid RXON configuration. Not committing.\n");
1064 return -EINVAL;
1065 }
1066
1067 /*
1068 * receive commit_rxon request
1069 * abort any previous channel switch if still in process
1070 */
1071 if (test_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status) &&
1072 (priv->switch_channel != ctx->staging.channel)) {
1073 IWL_DEBUG_11H(priv, "abort channel switch on %d\n",
1074 le16_to_cpu(priv->switch_channel));
1075 iwl_chswitch_done(priv, false);
1076 }
1077
1078 /*
1079 * If we don't need to send a full RXON, we can use
1080 * iwl_rxon_assoc_cmd which is used to reconfigure filter
1081 * and other flags for the current radio configuration.
1082 */
1083 if (!iwl_full_rxon_required(priv, ctx)) {
1084 ret = iwlagn_send_rxon_assoc(priv, ctx);
1085 if (ret) {
1086 IWL_ERR(priv, "Error setting RXON_ASSOC (%d)\n", ret);
1087 return ret;
1088 }
1089
1090 memcpy(active, &ctx->staging, sizeof(*active));
1091 /*
1092 * We do not commit tx power settings while channel changing,
1093 * do it now if after settings changed.
1094 */
1095 iwl_set_tx_power(priv, priv->tx_power_next, false);
1096
1097 /* make sure we are in the right PS state */
1098 iwl_power_update_mode(priv, true);
1099
1100 return 0;
1101 }
1102
1103 iwl_set_rxon_hwcrypto(priv, ctx, !iwlwifi_mod_params.swcrypto);
1104
1105 IWL_DEBUG_INFO(priv,
1106 "Going to commit RXON\n"
1107 " * with%s RXON_FILTER_ASSOC_MSK\n"
1108 " * channel = %d\n"
1109 " * bssid = %pM\n",
1110 (new_assoc ? "" : "out"),
1111 le16_to_cpu(ctx->staging.channel),
1112 ctx->staging.bssid_addr);
1113
1114 /*
1115 * Always clear associated first, but with the correct config.
1116 * This is required as for example station addition for the
1117 * AP station must be done after the BSSID is set to correctly
1118 * set up filters in the device.
1119 */
1120 ret = iwlagn_rxon_disconn(priv, ctx);
1121 if (ret)
1122 return ret;
1123
1124 ret = iwlagn_set_pan_params(priv);
1125 if (ret)
1126 return ret;
1127
1128 if (new_assoc)
1129 return iwlagn_rxon_connect(priv, ctx);
1130
1131 return 0;
1132 }
1133
1134 void iwlagn_config_ht40(struct ieee80211_conf *conf,
1135 struct iwl_rxon_context *ctx)
1136 {
1137 if (conf_is_ht40_minus(conf)) {
1138 ctx->ht.extension_chan_offset =
1139 IEEE80211_HT_PARAM_CHA_SEC_BELOW;
1140 ctx->ht.is_40mhz = true;
1141 } else if (conf_is_ht40_plus(conf)) {
1142 ctx->ht.extension_chan_offset =
1143 IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
1144 ctx->ht.is_40mhz = true;
1145 } else {
1146 ctx->ht.extension_chan_offset =
1147 IEEE80211_HT_PARAM_CHA_SEC_NONE;
1148 ctx->ht.is_40mhz = false;
1149 }
1150 }
1151
1152 int iwlagn_mac_config(struct ieee80211_hw *hw, u32 changed)
1153 {
1154 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1155 struct iwl_rxon_context *ctx;
1156 struct ieee80211_conf *conf = &hw->conf;
1157 struct ieee80211_channel *channel = conf->chandef.chan;
1158 int ret = 0;
1159
1160 IWL_DEBUG_MAC80211(priv, "enter: changed %#x\n", changed);
1161
1162 mutex_lock(&priv->mutex);
1163
1164 if (unlikely(test_bit(STATUS_SCANNING, &priv->status))) {
1165 IWL_DEBUG_MAC80211(priv, "leave - scanning\n");
1166 goto out;
1167 }
1168
1169 if (!iwl_is_ready(priv)) {
1170 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
1171 goto out;
1172 }
1173
1174 if (changed & (IEEE80211_CONF_CHANGE_SMPS |
1175 IEEE80211_CONF_CHANGE_CHANNEL)) {
1176 /* mac80211 uses static for non-HT which is what we want */
1177 priv->current_ht_config.smps = conf->smps_mode;
1178
1179 /*
1180 * Recalculate chain counts.
1181 *
1182 * If monitor mode is enabled then mac80211 will
1183 * set up the SM PS mode to OFF if an HT channel is
1184 * configured.
1185 */
1186 for_each_context(priv, ctx)
1187 iwlagn_set_rxon_chain(priv, ctx);
1188 }
1189
1190 if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
1191 for_each_context(priv, ctx) {
1192 /* Configure HT40 channels */
1193 if (ctx->ht.enabled != conf_is_ht(conf))
1194 ctx->ht.enabled = conf_is_ht(conf);
1195
1196 if (ctx->ht.enabled) {
1197 /* if HT40 is used, it should not change
1198 * after associated except channel switch */
1199 if (!ctx->ht.is_40mhz ||
1200 !iwl_is_associated_ctx(ctx))
1201 iwlagn_config_ht40(conf, ctx);
1202 } else
1203 ctx->ht.is_40mhz = false;
1204
1205 /*
1206 * Default to no protection. Protection mode will
1207 * later be set from BSS config in iwl_ht_conf
1208 */
1209 ctx->ht.protection = IEEE80211_HT_OP_MODE_PROTECTION_NONE;
1210
1211 /* if we are switching from ht to 2.4 clear flags
1212 * from any ht related info since 2.4 does not
1213 * support ht */
1214 if (le16_to_cpu(ctx->staging.channel) !=
1215 channel->hw_value)
1216 ctx->staging.flags = 0;
1217
1218 iwl_set_rxon_channel(priv, channel, ctx);
1219 iwl_set_rxon_ht(priv, &priv->current_ht_config);
1220
1221 iwl_set_flags_for_band(priv, ctx, channel->band,
1222 ctx->vif);
1223 }
1224
1225 iwl_update_bcast_stations(priv);
1226 }
1227
1228 if (changed & (IEEE80211_CONF_CHANGE_PS |
1229 IEEE80211_CONF_CHANGE_IDLE)) {
1230 ret = iwl_power_update_mode(priv, false);
1231 if (ret)
1232 IWL_DEBUG_MAC80211(priv, "Error setting sleep level\n");
1233 }
1234
1235 if (changed & IEEE80211_CONF_CHANGE_POWER) {
1236 IWL_DEBUG_MAC80211(priv, "TX Power old=%d new=%d\n",
1237 priv->tx_power_user_lmt, conf->power_level);
1238
1239 iwl_set_tx_power(priv, conf->power_level, false);
1240 }
1241
1242 for_each_context(priv, ctx) {
1243 if (!memcmp(&ctx->staging, &ctx->active, sizeof(ctx->staging)))
1244 continue;
1245 iwlagn_commit_rxon(priv, ctx);
1246 }
1247 out:
1248 mutex_unlock(&priv->mutex);
1249 IWL_DEBUG_MAC80211(priv, "leave\n");
1250
1251 return ret;
1252 }
1253
1254 static void iwlagn_check_needed_chains(struct iwl_priv *priv,
1255 struct iwl_rxon_context *ctx,
1256 struct ieee80211_bss_conf *bss_conf)
1257 {
1258 struct ieee80211_vif *vif = ctx->vif;
1259 struct iwl_rxon_context *tmp;
1260 struct ieee80211_sta *sta;
1261 struct iwl_ht_config *ht_conf = &priv->current_ht_config;
1262 struct ieee80211_sta_ht_cap *ht_cap;
1263 bool need_multiple;
1264
1265 lockdep_assert_held(&priv->mutex);
1266
1267 switch (vif->type) {
1268 case NL80211_IFTYPE_STATION:
1269 rcu_read_lock();
1270 sta = ieee80211_find_sta(vif, bss_conf->bssid);
1271 if (!sta) {
1272 /*
1273 * If at all, this can only happen through a race
1274 * when the AP disconnects us while we're still
1275 * setting up the connection, in that case mac80211
1276 * will soon tell us about that.
1277 */
1278 need_multiple = false;
1279 rcu_read_unlock();
1280 break;
1281 }
1282
1283 ht_cap = &sta->deflink.ht_cap;
1284
1285 need_multiple = true;
1286
1287 /*
1288 * If the peer advertises no support for receiving 2 and 3
1289 * stream MCS rates, it can't be transmitting them either.
1290 */
1291 if (ht_cap->mcs.rx_mask[1] == 0 &&
1292 ht_cap->mcs.rx_mask[2] == 0) {
1293 need_multiple = false;
1294 } else if (!(ht_cap->mcs.tx_params &
1295 IEEE80211_HT_MCS_TX_DEFINED)) {
1296 /* If it can't TX MCS at all ... */
1297 need_multiple = false;
1298 } else if (ht_cap->mcs.tx_params &
1299 IEEE80211_HT_MCS_TX_RX_DIFF) {
1300 int maxstreams;
1301
1302 /*
1303 * But if it can receive them, it might still not
1304 * be able to transmit them, which is what we need
1305 * to check here -- so check the number of streams
1306 * it advertises for TX (if different from RX).
1307 */
1308
1309 maxstreams = (ht_cap->mcs.tx_params &
1310 IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK);
1311 maxstreams >>=
1312 IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT;
1313 maxstreams += 1;
1314
1315 if (maxstreams <= 1)
1316 need_multiple = false;
1317 }
1318
1319 rcu_read_unlock();
1320 break;
1321 case NL80211_IFTYPE_ADHOC:
1322 /* currently */
1323 need_multiple = false;
1324 break;
1325 default:
1326 /* only AP really */
1327 need_multiple = true;
1328 break;
1329 }
1330
1331 ctx->ht_need_multiple_chains = need_multiple;
1332
1333 if (!need_multiple) {
1334 /* check all contexts */
1335 for_each_context(priv, tmp) {
1336 if (!tmp->vif)
1337 continue;
1338 if (tmp->ht_need_multiple_chains) {
1339 need_multiple = true;
1340 break;
1341 }
1342 }
1343 }
1344
1345 ht_conf->single_chain_sufficient = !need_multiple;
1346 }
1347
1348 static void iwlagn_chain_noise_reset(struct iwl_priv *priv)
1349 {
1350 struct iwl_chain_noise_data *data = &priv->chain_noise_data;
1351 int ret;
1352
1353 if (priv->calib_disabled & IWL_CHAIN_NOISE_CALIB_DISABLED)
1354 return;
1355
1356 if ((data->state == IWL_CHAIN_NOISE_ALIVE) &&
1357 iwl_is_any_associated(priv)) {
1358 struct iwl_calib_chain_noise_reset_cmd cmd;
1359
1360 /* clear data for chain noise calibration algorithm */
1361 data->chain_noise_a = 0;
1362 data->chain_noise_b = 0;
1363 data->chain_noise_c = 0;
1364 data->chain_signal_a = 0;
1365 data->chain_signal_b = 0;
1366 data->chain_signal_c = 0;
1367 data->beacon_count = 0;
1368
1369 memset(&cmd, 0, sizeof(cmd));
1370 iwl_set_calib_hdr(&cmd.hdr,
1371 priv->phy_calib_chain_noise_reset_cmd);
1372 ret = iwl_dvm_send_cmd_pdu(priv,
1373 REPLY_PHY_CALIBRATION_CMD,
1374 0, sizeof(cmd), &cmd);
1375 if (ret)
1376 IWL_ERR(priv,
1377 "Could not send REPLY_PHY_CALIBRATION_CMD\n");
1378 data->state = IWL_CHAIN_NOISE_ACCUMULATE;
1379 IWL_DEBUG_CALIB(priv, "Run chain_noise_calibrate\n");
1380 }
1381 }
1382
1383 void iwlagn_bss_info_changed(struct ieee80211_hw *hw,
1384 struct ieee80211_vif *vif,
1385 struct ieee80211_bss_conf *bss_conf,
1386 u64 changes)
1387 {
1388 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1389 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1390 int ret;
1391 bool force = false;
1392
1393 mutex_lock(&priv->mutex);
1394
1395 if (changes & BSS_CHANGED_IDLE && vif->cfg.idle) {
1396 /*
1397 * If we go idle, then clearly no "passive-no-rx"
1398 * workaround is needed any more, this is a reset.
1399 */
1400 iwlagn_lift_passive_no_rx(priv);
1401 }
1402
1403 if (unlikely(!iwl_is_ready(priv))) {
1404 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
1405 mutex_unlock(&priv->mutex);
1406 return;
1407 }
1408
1409 if (unlikely(!ctx->vif)) {
1410 IWL_DEBUG_MAC80211(priv, "leave - vif is NULL\n");
1411 mutex_unlock(&priv->mutex);
1412 return;
1413 }
1414
1415 if (changes & BSS_CHANGED_BEACON_INT)
1416 force = true;
1417
1418 if (changes & BSS_CHANGED_QOS) {
1419 ctx->qos_data.qos_active = bss_conf->qos;
1420 iwlagn_update_qos(priv, ctx);
1421 }
1422
1423 ctx->staging.assoc_id = cpu_to_le16(vif->cfg.aid);
1424 if (vif->bss_conf.use_short_preamble)
1425 ctx->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
1426 else
1427 ctx->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
1428
1429 if (changes & BSS_CHANGED_ASSOC) {
1430 if (vif->cfg.assoc) {
1431 priv->timestamp = bss_conf->sync_tsf;
1432 ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
1433 } else {
1434 ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
1435
1436 if (ctx->ctxid == IWL_RXON_CTX_BSS)
1437 priv->have_rekey_data = false;
1438 }
1439
1440 iwlagn_bt_coex_rssi_monitor(priv);
1441 }
1442
1443 if (ctx->ht.enabled) {
1444 ctx->ht.protection = bss_conf->ht_operation_mode &
1445 IEEE80211_HT_OP_MODE_PROTECTION;
1446 ctx->ht.non_gf_sta_present = !!(bss_conf->ht_operation_mode &
1447 IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT);
1448 iwlagn_check_needed_chains(priv, ctx, bss_conf);
1449 iwl_set_rxon_ht(priv, &priv->current_ht_config);
1450 }
1451
1452 iwlagn_set_rxon_chain(priv, ctx);
1453
1454 if (bss_conf->use_cts_prot && (priv->band != NL80211_BAND_5GHZ))
1455 ctx->staging.flags |= RXON_FLG_TGG_PROTECT_MSK;
1456 else
1457 ctx->staging.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
1458
1459 if (bss_conf->use_cts_prot)
1460 ctx->staging.flags |= RXON_FLG_SELF_CTS_EN;
1461 else
1462 ctx->staging.flags &= ~RXON_FLG_SELF_CTS_EN;
1463
1464 memcpy(ctx->staging.bssid_addr, bss_conf->bssid, ETH_ALEN);
1465
1466 if (vif->type == NL80211_IFTYPE_AP ||
1467 vif->type == NL80211_IFTYPE_ADHOC) {
1468 if (vif->bss_conf.enable_beacon) {
1469 ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
1470 priv->beacon_ctx = ctx;
1471 } else {
1472 ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
1473 priv->beacon_ctx = NULL;
1474 }
1475 }
1476
1477 /*
1478 * If the ucode decides to do beacon filtering before
1479 * association, it will lose beacons that are needed
1480 * before sending frames out on passive channels. This
1481 * causes association failures on those channels. Enable
1482 * receiving beacons in such cases.
1483 */
1484
1485 if (vif->type == NL80211_IFTYPE_STATION) {
1486 if (!vif->cfg.assoc)
1487 ctx->staging.filter_flags |= RXON_FILTER_BCON_AWARE_MSK;
1488 else
1489 ctx->staging.filter_flags &=
1490 ~RXON_FILTER_BCON_AWARE_MSK;
1491 }
1492
1493 if (force || memcmp(&ctx->staging, &ctx->active, sizeof(ctx->staging)))
1494 iwlagn_commit_rxon(priv, ctx);
1495
1496 if (changes & BSS_CHANGED_ASSOC && vif->cfg.assoc) {
1497 /*
1498 * The chain noise calibration will enable PM upon
1499 * completion. If calibration has already been run
1500 * then we need to enable power management here.
1501 */
1502 if (priv->chain_noise_data.state == IWL_CHAIN_NOISE_DONE)
1503 iwl_power_update_mode(priv, false);
1504
1505 /* Enable RX differential gain and sensitivity calibrations */
1506 iwlagn_chain_noise_reset(priv);
1507 priv->start_calib = 1;
1508 }
1509
1510 if (changes & BSS_CHANGED_IBSS) {
1511 ret = iwlagn_manage_ibss_station(priv, vif,
1512 vif->cfg.ibss_joined);
1513 if (ret)
1514 IWL_ERR(priv, "failed to %s IBSS station %pM\n",
1515 vif->cfg.ibss_joined ? "add" : "remove",
1516 bss_conf->bssid);
1517 }
1518
1519 if (changes & BSS_CHANGED_BEACON && priv->beacon_ctx == ctx) {
1520 if (iwlagn_update_beacon(priv, vif))
1521 IWL_ERR(priv, "Error updating beacon\n");
1522 }
1523
1524 mutex_unlock(&priv->mutex);
1525 }
1526
1527 void iwlagn_post_scan(struct iwl_priv *priv)
1528 {
1529 struct iwl_rxon_context *ctx;
1530
1531 /*
1532 * We do not commit power settings while scan is pending,
1533 * do it now if the settings changed.
1534 */
1535 iwl_power_set_mode(priv, &priv->power_data.sleep_cmd_next, false);
1536 iwl_set_tx_power(priv, priv->tx_power_next, false);
1537
1538 /*
1539 * Since setting the RXON may have been deferred while
1540 * performing the scan, fire one off if needed
1541 */
1542 for_each_context(priv, ctx)
1543 if (memcmp(&ctx->staging, &ctx->active, sizeof(ctx->staging)))
1544 iwlagn_commit_rxon(priv, ctx);
1545
1546 iwlagn_set_pan_params(priv);
1547 }
Linux Kernel