1/******************************************************************************
2 *
3 * Copyright(c) 2003 - 2014 Intel Corporation. All rights reserved.
4 *
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of version 2 of the GNU General Public License as
7 * published by the Free Software Foundation.
8 *
9 * This program is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
12 * more details.
13 *
14 * You should have received a copy of the GNU General Public License along with
15 * this program; if not, write to the Free Software Foundation, Inc.,
16 * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
17 *
18 * The full GNU General Public License is included in this distribution in the
19 * file called LICENSE.
20 *
21 * Contact Information:
22 * Intel Linux Wireless <ilw@linux.intel.com>
23 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
24 *
25 *****************************************************************************/
26
27#include <linux/etherdevice.h>
28#include "iwl-trans.h"
29#include "iwl-modparams.h"
30#include "dev.h"
31#include "agn.h"
32#include "calib.h"
33
34/*
35 * initialize rxon structure with default values from eeprom
36 */
37void iwl_connection_init_rx_config(struct iwl_priv *priv,
38				   struct iwl_rxon_context *ctx)
39{
40	memset(&ctx->staging, 0, sizeof(ctx->staging));
41
42	if (!ctx->vif) {
43		ctx->staging.dev_type = ctx->unused_devtype;
44	} else
45	switch (ctx->vif->type) {
46	case NL80211_IFTYPE_AP:
47		ctx->staging.dev_type = ctx->ap_devtype;
48		break;
49
50	case NL80211_IFTYPE_STATION:
51		ctx->staging.dev_type = ctx->station_devtype;
52		ctx->staging.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
53		break;
54
55	case NL80211_IFTYPE_ADHOC:
56		ctx->staging.dev_type = ctx->ibss_devtype;
57		ctx->staging.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
58		ctx->staging.filter_flags = RXON_FILTER_BCON_AWARE_MSK |
59						  RXON_FILTER_ACCEPT_GRP_MSK;
60		break;
61
62	case NL80211_IFTYPE_MONITOR:
63		ctx->staging.dev_type = RXON_DEV_TYPE_SNIFFER;
64		break;
65
66	default:
67		IWL_ERR(priv, "Unsupported interface type %d\n",
68			ctx->vif->type);
69		break;
70	}
71
72#if 0
73	/* TODO:  Figure out when short_preamble would be set and cache from
74	 * that */
75	if (!hw_to_local(priv->hw)->short_preamble)
76		ctx->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
77	else
78		ctx->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
79#endif
80
81	ctx->staging.channel =
82		cpu_to_le16(priv->hw->conf.chandef.chan->hw_value);
83	priv->band = priv->hw->conf.chandef.chan->band;
84
85	iwl_set_flags_for_band(priv, ctx, priv->band, ctx->vif);
86
87	/* clear both MIX and PURE40 mode flag */
88	ctx->staging.flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED |
89					RXON_FLG_CHANNEL_MODE_PURE_40);
90	if (ctx->vif)
91		memcpy(ctx->staging.node_addr, ctx->vif->addr, ETH_ALEN);
92
93	ctx->staging.ofdm_ht_single_stream_basic_rates = 0xff;
94	ctx->staging.ofdm_ht_dual_stream_basic_rates = 0xff;
95	ctx->staging.ofdm_ht_triple_stream_basic_rates = 0xff;
96}
97
98static int iwlagn_disable_bss(struct iwl_priv *priv,
99			      struct iwl_rxon_context *ctx,
100			      struct iwl_rxon_cmd *send)
101{
102	__le32 old_filter = send->filter_flags;
103	int ret;
104
105	send->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
106	ret = iwl_dvm_send_cmd_pdu(priv, ctx->rxon_cmd,
107				0, sizeof(*send), send);
108
109	send->filter_flags = old_filter;
110
111	if (ret)
112		IWL_DEBUG_QUIET_RFKILL(priv,
113			"Error clearing ASSOC_MSK on BSS (%d)\n", ret);
114
115	return ret;
116}
117
118static int iwlagn_disable_pan(struct iwl_priv *priv,
119			      struct iwl_rxon_context *ctx,
120			      struct iwl_rxon_cmd *send)
121{
122	struct iwl_notification_wait disable_wait;
123	__le32 old_filter = send->filter_flags;
124	u8 old_dev_type = send->dev_type;
125	int ret;
126	static const u8 deactivate_cmd[] = {
127		REPLY_WIPAN_DEACTIVATION_COMPLETE
128	};
129
130	iwl_init_notification_wait(&priv->notif_wait, &disable_wait,
131				   deactivate_cmd, ARRAY_SIZE(deactivate_cmd),
132				   NULL, NULL);
133
134	send->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
135	send->dev_type = RXON_DEV_TYPE_P2P;
136	ret = iwl_dvm_send_cmd_pdu(priv, ctx->rxon_cmd,
137				0, sizeof(*send), send);
138
139	send->filter_flags = old_filter;
140	send->dev_type = old_dev_type;
141
142	if (ret) {
143		IWL_ERR(priv, "Error disabling PAN (%d)\n", ret);
144		iwl_remove_notification(&priv->notif_wait, &disable_wait);
145	} else {
146		ret = iwl_wait_notification(&priv->notif_wait,
147					    &disable_wait, HZ);
148		if (ret)
149			IWL_ERR(priv, "Timed out waiting for PAN disable\n");
150	}
151
152	return ret;
153}
154
155static int iwlagn_disconn_pan(struct iwl_priv *priv,
156			      struct iwl_rxon_context *ctx,
157			      struct iwl_rxon_cmd *send)
158{
159	__le32 old_filter = send->filter_flags;
160	int ret;
161
162	send->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
163	ret = iwl_dvm_send_cmd_pdu(priv, ctx->rxon_cmd, 0,
164				sizeof(*send), send);
165
166	send->filter_flags = old_filter;
167
168	return ret;
169}
170
171static void iwlagn_update_qos(struct iwl_priv *priv,
172			      struct iwl_rxon_context *ctx)
173{
174	int ret;
175
176	if (!ctx->is_active)
177		return;
178
179	ctx->qos_data.def_qos_parm.qos_flags = 0;
180
181	if (ctx->qos_data.qos_active)
182		ctx->qos_data.def_qos_parm.qos_flags |=
183			QOS_PARAM_FLG_UPDATE_EDCA_MSK;
184
185	if (ctx->ht.enabled)
186		ctx->qos_data.def_qos_parm.qos_flags |= QOS_PARAM_FLG_TGN_MSK;
187
188	IWL_DEBUG_INFO(priv, "send QoS cmd with Qos active=%d FLAGS=0x%X\n",
189		      ctx->qos_data.qos_active,
190		      ctx->qos_data.def_qos_parm.qos_flags);
191
192	ret = iwl_dvm_send_cmd_pdu(priv, ctx->qos_cmd, 0,
193			       sizeof(struct iwl_qosparam_cmd),
194			       &ctx->qos_data.def_qos_parm);
195	if (ret)
196		IWL_DEBUG_QUIET_RFKILL(priv, "Failed to update QoS\n");
197}
198
199static int iwlagn_update_beacon(struct iwl_priv *priv,
200				struct ieee80211_vif *vif)
201{
202	lockdep_assert_held(&priv->mutex);
203
204	dev_kfree_skb(priv->beacon_skb);
205	priv->beacon_skb = ieee80211_beacon_get(priv->hw, vif);
206	if (!priv->beacon_skb)
207		return -ENOMEM;
208	return iwlagn_send_beacon_cmd(priv);
209}
210
211static int iwlagn_send_rxon_assoc(struct iwl_priv *priv,
212				  struct iwl_rxon_context *ctx)
213{
214	int ret = 0;
215	struct iwl_rxon_assoc_cmd rxon_assoc;
216	const struct iwl_rxon_cmd *rxon1 = &ctx->staging;
217	const struct iwl_rxon_cmd *rxon2 = &ctx->active;
218
219	if ((rxon1->flags == rxon2->flags) &&
220	    (rxon1->filter_flags == rxon2->filter_flags) &&
221	    (rxon1->cck_basic_rates == rxon2->cck_basic_rates) &&
222	    (rxon1->ofdm_ht_single_stream_basic_rates ==
223	     rxon2->ofdm_ht_single_stream_basic_rates) &&
224	    (rxon1->ofdm_ht_dual_stream_basic_rates ==
225	     rxon2->ofdm_ht_dual_stream_basic_rates) &&
226	    (rxon1->ofdm_ht_triple_stream_basic_rates ==
227	     rxon2->ofdm_ht_triple_stream_basic_rates) &&
228	    (rxon1->acquisition_data == rxon2->acquisition_data) &&
229	    (rxon1->rx_chain == rxon2->rx_chain) &&
230	    (rxon1->ofdm_basic_rates == rxon2->ofdm_basic_rates)) {
231		IWL_DEBUG_INFO(priv, "Using current RXON_ASSOC.  Not resending.\n");
232		return 0;
233	}
234
235	rxon_assoc.flags = ctx->staging.flags;
236	rxon_assoc.filter_flags = ctx->staging.filter_flags;
237	rxon_assoc.ofdm_basic_rates = ctx->staging.ofdm_basic_rates;
238	rxon_assoc.cck_basic_rates = ctx->staging.cck_basic_rates;
239	rxon_assoc.reserved1 = 0;
240	rxon_assoc.reserved2 = 0;
241	rxon_assoc.reserved3 = 0;
242	rxon_assoc.ofdm_ht_single_stream_basic_rates =
243	    ctx->staging.ofdm_ht_single_stream_basic_rates;
244	rxon_assoc.ofdm_ht_dual_stream_basic_rates =
245	    ctx->staging.ofdm_ht_dual_stream_basic_rates;
246	rxon_assoc.rx_chain_select_flags = ctx->staging.rx_chain;
247	rxon_assoc.ofdm_ht_triple_stream_basic_rates =
248		 ctx->staging.ofdm_ht_triple_stream_basic_rates;
249	rxon_assoc.acquisition_data = ctx->staging.acquisition_data;
250
251	ret = iwl_dvm_send_cmd_pdu(priv, ctx->rxon_assoc_cmd,
252				CMD_ASYNC, sizeof(rxon_assoc), &rxon_assoc);
253	return ret;
254}
255
256static u16 iwl_adjust_beacon_interval(u16 beacon_val, u16 max_beacon_val)
257{
258	u16 new_val;
259	u16 beacon_factor;
260
261	/*
262	 * If mac80211 hasn't given us a beacon interval, program
263	 * the default into the device (not checking this here
264	 * would cause the adjustment below to return the maximum
265	 * value, which may break PAN.)
266	 */
267	if (!beacon_val)
268		return DEFAULT_BEACON_INTERVAL;
269
270	/*
271	 * If the beacon interval we obtained from the peer
272	 * is too large, we'll have to wake up more often
273	 * (and in IBSS case, we'll beacon too much)
274	 *
275	 * For example, if max_beacon_val is 4096, and the
276	 * requested beacon interval is 7000, we'll have to
277	 * use 3500 to be able to wake up on the beacons.
278	 *
279	 * This could badly influence beacon detection stats.
280	 */
281
282	beacon_factor = (beacon_val + max_beacon_val) / max_beacon_val;
283	new_val = beacon_val / beacon_factor;
284
285	if (!new_val)
286		new_val = max_beacon_val;
287
288	return new_val;
289}
290
291static int iwl_send_rxon_timing(struct iwl_priv *priv,
292				struct iwl_rxon_context *ctx)
293{
294	u64 tsf;
295	s32 interval_tm, rem;
296	struct ieee80211_conf *conf = NULL;
297	u16 beacon_int;
298	struct ieee80211_vif *vif = ctx->vif;
299
300	conf = &priv->hw->conf;
301
302	lockdep_assert_held(&priv->mutex);
303
304	memset(&ctx->timing, 0, sizeof(struct iwl_rxon_time_cmd));
305
306	ctx->timing.timestamp = cpu_to_le64(priv->timestamp);
307	ctx->timing.listen_interval = cpu_to_le16(conf->listen_interval);
308
309	beacon_int = vif ? vif->bss_conf.beacon_int : 0;
310
311	/*
312	 * TODO: For IBSS we need to get atim_window from mac80211,
313	 *	 for now just always use 0
314	 */
315	ctx->timing.atim_window = 0;
316
317	if (ctx->ctxid == IWL_RXON_CTX_PAN &&
318	    (!ctx->vif || ctx->vif->type != NL80211_IFTYPE_STATION) &&
319	    iwl_is_associated(priv, IWL_RXON_CTX_BSS) &&
320	    priv->contexts[IWL_RXON_CTX_BSS].vif &&
321	    priv->contexts[IWL_RXON_CTX_BSS].vif->bss_conf.beacon_int) {
322		ctx->timing.beacon_interval =
323			priv->contexts[IWL_RXON_CTX_BSS].timing.beacon_interval;
324		beacon_int = le16_to_cpu(ctx->timing.beacon_interval);
325	} else if (ctx->ctxid == IWL_RXON_CTX_BSS &&
326		   iwl_is_associated(priv, IWL_RXON_CTX_PAN) &&
327		   priv->contexts[IWL_RXON_CTX_PAN].vif &&
328		   priv->contexts[IWL_RXON_CTX_PAN].vif->bss_conf.beacon_int &&
329		   (!iwl_is_associated_ctx(ctx) || !ctx->vif ||
330		    !ctx->vif->bss_conf.beacon_int)) {
331		ctx->timing.beacon_interval =
332			priv->contexts[IWL_RXON_CTX_PAN].timing.beacon_interval;
333		beacon_int = le16_to_cpu(ctx->timing.beacon_interval);
334	} else {
335		beacon_int = iwl_adjust_beacon_interval(beacon_int,
336			IWL_MAX_UCODE_BEACON_INTERVAL * TIME_UNIT);
337		ctx->timing.beacon_interval = cpu_to_le16(beacon_int);
338	}
339
340	ctx->beacon_int = beacon_int;
341
342	tsf = priv->timestamp; /* tsf is modifed by do_div: copy it */
343	interval_tm = beacon_int * TIME_UNIT;
344	rem = do_div(tsf, interval_tm);
345	ctx->timing.beacon_init_val = cpu_to_le32(interval_tm - rem);
346
347	ctx->timing.dtim_period = vif ? (vif->bss_conf.dtim_period ?: 1) : 1;
348
349	IWL_DEBUG_ASSOC(priv,
350			"beacon interval %d beacon timer %d beacon tim %d\n",
351			le16_to_cpu(ctx->timing.beacon_interval),
352			le32_to_cpu(ctx->timing.beacon_init_val),
353			le16_to_cpu(ctx->timing.atim_window));
354
355	return iwl_dvm_send_cmd_pdu(priv, ctx->rxon_timing_cmd,
356				0, sizeof(ctx->timing), &ctx->timing);
357}
358
359static int iwlagn_rxon_disconn(struct iwl_priv *priv,
360			       struct iwl_rxon_context *ctx)
361{
362	int ret;
363	struct iwl_rxon_cmd *active = (void *)&ctx->active;
364
365	if (ctx->ctxid == IWL_RXON_CTX_BSS) {
366		ret = iwlagn_disable_bss(priv, ctx, &ctx->staging);
367	} else {
368		ret = iwlagn_disable_pan(priv, ctx, &ctx->staging);
369		if (ret)
370			return ret;
371		if (ctx->vif) {
372			ret = iwl_send_rxon_timing(priv, ctx);
373			if (ret) {
374				IWL_ERR(priv, "Failed to send timing (%d)!\n", ret);
375				return ret;
376			}
377			ret = iwlagn_disconn_pan(priv, ctx, &ctx->staging);
378		}
379	}
380	if (ret)
381		return ret;
382
383	/*
384	 * Un-assoc RXON clears the station table and WEP
385	 * keys, so we have to restore those afterwards.
386	 */
387	iwl_clear_ucode_stations(priv, ctx);
388	/* update -- might need P2P now */
389	iwl_update_bcast_station(priv, ctx);
390	iwl_restore_stations(priv, ctx);
391	ret = iwl_restore_default_wep_keys(priv, ctx);
392	if (ret) {
393		IWL_ERR(priv, "Failed to restore WEP keys (%d)\n", ret);
394		return ret;
395	}
396
397	memcpy(active, &ctx->staging, sizeof(*active));
398	return 0;
399}
400
401static int iwl_set_tx_power(struct iwl_priv *priv, s8 tx_power, bool force)
402{
403	int ret;
404	s8 prev_tx_power;
405	bool defer;
406	struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
407
408	if (priv->calib_disabled & IWL_TX_POWER_CALIB_DISABLED)
409		return 0;
410
411	lockdep_assert_held(&priv->mutex);
412
413	if (priv->tx_power_user_lmt == tx_power && !force)
414		return 0;
415
416	if (tx_power < IWLAGN_TX_POWER_TARGET_POWER_MIN) {
417		IWL_WARN(priv,
418			 "Requested user TXPOWER %d below lower limit %d.\n",
419			 tx_power,
420			 IWLAGN_TX_POWER_TARGET_POWER_MIN);
421		return -EINVAL;
422	}
423
424	if (tx_power > DIV_ROUND_UP(priv->nvm_data->max_tx_pwr_half_dbm, 2)) {
425		IWL_WARN(priv,
426			"Requested user TXPOWER %d above upper limit %d.\n",
427			 tx_power, priv->nvm_data->max_tx_pwr_half_dbm);
428		return -EINVAL;
429	}
430
431	if (!iwl_is_ready_rf(priv))
432		return -EIO;
433
434	/* scan complete and commit_rxon use tx_power_next value,
435	 * it always need to be updated for newest request */
436	priv->tx_power_next = tx_power;
437
438	/* do not set tx power when scanning or channel changing */
439	defer = test_bit(STATUS_SCANNING, &priv->status) ||
440		memcmp(&ctx->active, &ctx->staging, sizeof(ctx->staging));
441	if (defer && !force) {
442		IWL_DEBUG_INFO(priv, "Deferring tx power set\n");
443		return 0;
444	}
445
446	prev_tx_power = priv->tx_power_user_lmt;
447	priv->tx_power_user_lmt = tx_power;
448
449	ret = iwlagn_send_tx_power(priv);
450
451	/* if fail to set tx_power, restore the orig. tx power */
452	if (ret) {
453		priv->tx_power_user_lmt = prev_tx_power;
454		priv->tx_power_next = prev_tx_power;
455	}
456	return ret;
457}
458
459static int iwlagn_rxon_connect(struct iwl_priv *priv,
460			       struct iwl_rxon_context *ctx)
461{
462	int ret;
463	struct iwl_rxon_cmd *active = (void *)&ctx->active;
464
465	/* RXON timing must be before associated RXON */
466	if (ctx->ctxid == IWL_RXON_CTX_BSS) {
467		ret = iwl_send_rxon_timing(priv, ctx);
468		if (ret) {
469			IWL_ERR(priv, "Failed to send timing (%d)!\n", ret);
470			return ret;
471		}
472	}
473	/* QoS info may be cleared by previous un-assoc RXON */
474	iwlagn_update_qos(priv, ctx);
475
476	/*
477	 * We'll run into this code path when beaconing is
478	 * enabled, but then we also need to send the beacon
479	 * to the device.
480	 */
481	if (ctx->vif && (ctx->vif->type == NL80211_IFTYPE_AP)) {
482		ret = iwlagn_update_beacon(priv, ctx->vif);
483		if (ret) {
484			IWL_ERR(priv,
485				"Error sending required beacon (%d)!\n",
486				ret);
487			return ret;
488		}
489	}
490
491	priv->start_calib = 0;
492	/*
493	 * Apply the new configuration.
494	 *
495	 * Associated RXON doesn't clear the station table in uCode,
496	 * so we don't need to restore stations etc. after this.
497	 */
498	ret = iwl_dvm_send_cmd_pdu(priv, ctx->rxon_cmd, 0,
499		      sizeof(struct iwl_rxon_cmd), &ctx->staging);
500	if (ret) {
501		IWL_ERR(priv, "Error setting new RXON (%d)\n", ret);
502		return ret;
503	}
504	memcpy(active, &ctx->staging, sizeof(*active));
505
506	/* IBSS beacon needs to be sent after setting assoc */
507	if (ctx->vif && (ctx->vif->type == NL80211_IFTYPE_ADHOC))
508		if (iwlagn_update_beacon(priv, ctx->vif))
509			IWL_ERR(priv, "Error sending IBSS beacon\n");
510	iwl_init_sensitivity(priv);
511
512	/*
513	 * If we issue a new RXON command which required a tune then
514	 * we must send a new TXPOWER command or we won't be able to
515	 * Tx any frames.
516	 *
517	 * It's expected we set power here if channel is changing.
518	 */
519	ret = iwl_set_tx_power(priv, priv->tx_power_next, true);
520	if (ret) {
521		IWL_ERR(priv, "Error sending TX power (%d)\n", ret);
522		return ret;
523	}
524
525	if (ctx->vif && ctx->vif->type == NL80211_IFTYPE_STATION &&
526	    priv->cfg->ht_params && priv->cfg->ht_params->smps_mode)
527		ieee80211_request_smps(ctx->vif,
528				       priv->cfg->ht_params->smps_mode);
529
530	return 0;
531}
532
533int iwlagn_set_pan_params(struct iwl_priv *priv)
534{
535	struct iwl_wipan_params_cmd cmd;
536	struct iwl_rxon_context *ctx_bss, *ctx_pan;
537	int slot0 = 300, slot1 = 0;
538	int ret;
539
540	if (priv->valid_contexts == BIT(IWL_RXON_CTX_BSS))
541		return 0;
542
543	BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
544
545	lockdep_assert_held(&priv->mutex);
546
547	ctx_bss = &priv->contexts[IWL_RXON_CTX_BSS];
548	ctx_pan = &priv->contexts[IWL_RXON_CTX_PAN];
549
550	/*
551	 * If the PAN context is inactive, then we don't need
552	 * to update the PAN parameters, the last thing we'll
553	 * have done before it goes inactive is making the PAN
554	 * parameters be WLAN-only.
555	 */
556	if (!ctx_pan->is_active)
557		return 0;
558
559	memset(&cmd, 0, sizeof(cmd));
560
561	/* only 2 slots are currently allowed */
562	cmd.num_slots = 2;
563
564	cmd.slots[0].type = 0; /* BSS */
565	cmd.slots[1].type = 1; /* PAN */
566
567	if (ctx_bss->vif && ctx_pan->vif) {
568		int bcnint = ctx_pan->beacon_int;
569		int dtim = ctx_pan->vif->bss_conf.dtim_period ?: 1;
570
571		/* should be set, but seems unused?? */
572		cmd.flags |= cpu_to_le16(IWL_WIPAN_PARAMS_FLG_SLOTTED_MODE);
573
574		if (ctx_pan->vif->type == NL80211_IFTYPE_AP &&
575		    bcnint &&
576		    bcnint != ctx_bss->beacon_int) {
577			IWL_ERR(priv,
578				"beacon intervals don't match (%d, %d)\n",
579				ctx_bss->beacon_int, ctx_pan->beacon_int);
580		} else
581			bcnint = max_t(int, bcnint,
582				       ctx_bss->beacon_int);
583		if (!bcnint)
584			bcnint = DEFAULT_BEACON_INTERVAL;
585		slot0 = bcnint / 2;
586		slot1 = bcnint - slot0;
587
588		if (test_bit(STATUS_SCAN_HW, &priv->status) ||
589		    (!ctx_bss->vif->bss_conf.idle &&
590		     !ctx_bss->vif->bss_conf.assoc)) {
591			slot0 = dtim * bcnint * 3 - IWL_MIN_SLOT_TIME;
592			slot1 = IWL_MIN_SLOT_TIME;
593		} else if (!ctx_pan->vif->bss_conf.idle &&
594			   !ctx_pan->vif->bss_conf.assoc) {
595			slot1 = dtim * bcnint * 3 - IWL_MIN_SLOT_TIME;
596			slot0 = IWL_MIN_SLOT_TIME;
597		}
598	} else if (ctx_pan->vif) {
599		slot0 = 0;
600		slot1 = max_t(int, 1, ctx_pan->vif->bss_conf.dtim_period) *
601					ctx_pan->beacon_int;
602		slot1 = max_t(int, DEFAULT_BEACON_INTERVAL, slot1);
603
604		if (test_bit(STATUS_SCAN_HW, &priv->status)) {
605			slot0 = slot1 * 3 - IWL_MIN_SLOT_TIME;
606			slot1 = IWL_MIN_SLOT_TIME;
607		}
608	}
609
610	cmd.slots[0].width = cpu_to_le16(slot0);
611	cmd.slots[1].width = cpu_to_le16(slot1);
612
613	ret = iwl_dvm_send_cmd_pdu(priv, REPLY_WIPAN_PARAMS, 0,
614			sizeof(cmd), &cmd);
615	if (ret)
616		IWL_ERR(priv, "Error setting PAN parameters (%d)\n", ret);
617
618	return ret;
619}
620
621static void _iwl_set_rxon_ht(struct iwl_priv *priv,
622			     struct iwl_ht_config *ht_conf,
623			     struct iwl_rxon_context *ctx)
624{
625	struct iwl_rxon_cmd *rxon = &ctx->staging;
626
627	if (!ctx->ht.enabled) {
628		rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |
629			RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK |
630			RXON_FLG_HT40_PROT_MSK |
631			RXON_FLG_HT_PROT_MSK);
632		return;
633	}
634
635	/* FIXME: if the definition of ht.protection changed, the "translation"
636	 * will be needed for rxon->flags
637	 */
638	rxon->flags |= cpu_to_le32(ctx->ht.protection <<
639				   RXON_FLG_HT_OPERATING_MODE_POS);
640
641	/* Set up channel bandwidth:
642	 * 20 MHz only, 20/40 mixed or pure 40 if ht40 ok */
643	/* clear the HT channel mode before set the mode */
644	rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |
645			 RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
646	if (iwl_is_ht40_tx_allowed(priv, ctx, NULL)) {
647		/* pure ht40 */
648		if (ctx->ht.protection ==
649		    IEEE80211_HT_OP_MODE_PROTECTION_20MHZ) {
650			rxon->flags |= RXON_FLG_CHANNEL_MODE_PURE_40;
651			/*
652			 * Note: control channel is opposite of extension
653			 * channel
654			 */
655			switch (ctx->ht.extension_chan_offset) {
656			case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
657				rxon->flags &=
658					~RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
659				break;
660			case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
661				rxon->flags |=
662					RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
663				break;
664			}
665		} else {
666			/*
667			 * Note: control channel is opposite of extension
668			 * channel
669			 */
670			switch (ctx->ht.extension_chan_offset) {
671			case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
672				rxon->flags &=
673					~(RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
674				rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
675				break;
676			case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
677				rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
678				rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
679				break;
680			case IEEE80211_HT_PARAM_CHA_SEC_NONE:
681			default:
682				/*
683				 * channel location only valid if in Mixed
684				 * mode
685				 */
686				IWL_ERR(priv,
687					"invalid extension channel offset\n");
688				break;
689			}
690		}
691	} else {
692		rxon->flags |= RXON_FLG_CHANNEL_MODE_LEGACY;
693	}
694
695	iwlagn_set_rxon_chain(priv, ctx);
696
697	IWL_DEBUG_ASSOC(priv, "rxon flags 0x%X operation mode :0x%X "
698			"extension channel offset 0x%x\n",
699			le32_to_cpu(rxon->flags), ctx->ht.protection,
700			ctx->ht.extension_chan_offset);
701}
702
703void iwl_set_rxon_ht(struct iwl_priv *priv, struct iwl_ht_config *ht_conf)
704{
705	struct iwl_rxon_context *ctx;
706
707	for_each_context(priv, ctx)
708		_iwl_set_rxon_ht(priv, ht_conf, ctx);
709}
710
711/**
712 * iwl_set_rxon_channel - Set the band and channel values in staging RXON
713 * @ch: requested channel as a pointer to struct ieee80211_channel
714
715 * NOTE:  Does not commit to the hardware; it sets appropriate bit fields
716 * in the staging RXON flag structure based on the ch->band
717 */
718void iwl_set_rxon_channel(struct iwl_priv *priv, struct ieee80211_channel *ch,
719			 struct iwl_rxon_context *ctx)
720{
721	enum ieee80211_band band = ch->band;
722	u16 channel = ch->hw_value;
723
724	if ((le16_to_cpu(ctx->staging.channel) == channel) &&
725	    (priv->band == band))
726		return;
727
728	ctx->staging.channel = cpu_to_le16(channel);
729	if (band == IEEE80211_BAND_5GHZ)
730		ctx->staging.flags &= ~RXON_FLG_BAND_24G_MSK;
731	else
732		ctx->staging.flags |= RXON_FLG_BAND_24G_MSK;
733
734	priv->band = band;
735
736	IWL_DEBUG_INFO(priv, "Staging channel set to %d [%d]\n", channel, band);
737
738}
739
740void iwl_set_flags_for_band(struct iwl_priv *priv,
741			    struct iwl_rxon_context *ctx,
742			    enum ieee80211_band band,
743			    struct ieee80211_vif *vif)
744{
745	if (band == IEEE80211_BAND_5GHZ) {
746		ctx->staging.flags &=
747		    ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK
748		      | RXON_FLG_CCK_MSK);
749		ctx->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
750	} else {
751		/* Copied from iwl_post_associate() */
752		if (vif && vif->bss_conf.use_short_slot)
753			ctx->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
754		else
755			ctx->staging.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
756
757		ctx->staging.flags |= RXON_FLG_BAND_24G_MSK;
758		ctx->staging.flags |= RXON_FLG_AUTO_DETECT_MSK;
759		ctx->staging.flags &= ~RXON_FLG_CCK_MSK;
760	}
761}
762
763static void iwl_set_rxon_hwcrypto(struct iwl_priv *priv,
764				  struct iwl_rxon_context *ctx, int hw_decrypt)
765{
766	struct iwl_rxon_cmd *rxon = &ctx->staging;
767
768	if (hw_decrypt)
769		rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
770	else
771		rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;
772
773}
774
775/* validate RXON structure is valid */
776static int iwl_check_rxon_cmd(struct iwl_priv *priv,
777			      struct iwl_rxon_context *ctx)
778{
779	struct iwl_rxon_cmd *rxon = &ctx->staging;
780	u32 errors = 0;
781
782	if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
783		if (rxon->flags & RXON_FLG_TGJ_NARROW_BAND_MSK) {
784			IWL_WARN(priv, "check 2.4G: wrong narrow\n");
785			errors |= BIT(0);
786		}
787		if (rxon->flags & RXON_FLG_RADAR_DETECT_MSK) {
788			IWL_WARN(priv, "check 2.4G: wrong radar\n");
789			errors |= BIT(1);
790		}
791	} else {
792		if (!(rxon->flags & RXON_FLG_SHORT_SLOT_MSK)) {
793			IWL_WARN(priv, "check 5.2G: not short slot!\n");
794			errors |= BIT(2);
795		}
796		if (rxon->flags & RXON_FLG_CCK_MSK) {
797			IWL_WARN(priv, "check 5.2G: CCK!\n");
798			errors |= BIT(3);
799		}
800	}
801	if ((rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1) {
802		IWL_WARN(priv, "mac/bssid mcast!\n");
803		errors |= BIT(4);
804	}
805
806	/* make sure basic rates 6Mbps and 1Mbps are supported */
807	if ((rxon->ofdm_basic_rates & IWL_RATE_6M_MASK) == 0 &&
808	    (rxon->cck_basic_rates & IWL_RATE_1M_MASK) == 0) {
809		IWL_WARN(priv, "neither 1 nor 6 are basic\n");
810		errors |= BIT(5);
811	}
812
813	if (le16_to_cpu(rxon->assoc_id) > 2007) {
814		IWL_WARN(priv, "aid > 2007\n");
815		errors |= BIT(6);
816	}
817
818	if ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK))
819			== (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK)) {
820		IWL_WARN(priv, "CCK and short slot\n");
821		errors |= BIT(7);
822	}
823
824	if ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK))
825			== (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK)) {
826		IWL_WARN(priv, "CCK and auto detect\n");
827		errors |= BIT(8);
828	}
829
830	if ((rxon->flags & (RXON_FLG_AUTO_DETECT_MSK |
831			    RXON_FLG_TGG_PROTECT_MSK)) ==
832			    RXON_FLG_TGG_PROTECT_MSK) {
833		IWL_WARN(priv, "TGg but no auto-detect\n");
834		errors |= BIT(9);
835	}
836
837	if (rxon->channel == 0) {
838		IWL_WARN(priv, "zero channel is invalid\n");
839		errors |= BIT(10);
840	}
841
842	WARN(errors, "Invalid RXON (%#x), channel %d",
843	     errors, le16_to_cpu(rxon->channel));
844
845	return errors ? -EINVAL : 0;
846}
847
848/**
849 * iwl_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed
850 * @priv: staging_rxon is compared to active_rxon
851 *
852 * If the RXON structure is changing enough to require a new tune,
853 * or is clearing the RXON_FILTER_ASSOC_MSK, then return 1 to indicate that
854 * a new tune (full RXON command, rather than RXON_ASSOC cmd) is required.
855 */
856static int iwl_full_rxon_required(struct iwl_priv *priv,
857				  struct iwl_rxon_context *ctx)
858{
859	const struct iwl_rxon_cmd *staging = &ctx->staging;
860	const struct iwl_rxon_cmd *active = &ctx->active;
861
862#define CHK(cond)							\
863	if ((cond)) {							\
864		IWL_DEBUG_INFO(priv, "need full RXON - " #cond "\n");	\
865		return 1;						\
866	}
867
868#define CHK_NEQ(c1, c2)						\
869	if ((c1) != (c2)) {					\
870		IWL_DEBUG_INFO(priv, "need full RXON - "	\
871			       #c1 " != " #c2 " - %d != %d\n",	\
872			       (c1), (c2));			\
873		return 1;					\
874	}
875
876	/* These items are only settable from the full RXON command */
877	CHK(!iwl_is_associated_ctx(ctx));
878	CHK(!ether_addr_equal(staging->bssid_addr, active->bssid_addr));
879	CHK(!ether_addr_equal(staging->node_addr, active->node_addr));
880	CHK(!ether_addr_equal(staging->wlap_bssid_addr,
881			      active->wlap_bssid_addr));
882	CHK_NEQ(staging->dev_type, active->dev_type);
883	CHK_NEQ(staging->channel, active->channel);
884	CHK_NEQ(staging->air_propagation, active->air_propagation);
885	CHK_NEQ(staging->ofdm_ht_single_stream_basic_rates,
886		active->ofdm_ht_single_stream_basic_rates);
887	CHK_NEQ(staging->ofdm_ht_dual_stream_basic_rates,
888		active->ofdm_ht_dual_stream_basic_rates);
889	CHK_NEQ(staging->ofdm_ht_triple_stream_basic_rates,
890		active->ofdm_ht_triple_stream_basic_rates);
891	CHK_NEQ(staging->assoc_id, active->assoc_id);
892
893	/* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
894	 * be updated with the RXON_ASSOC command -- however only some
895	 * flag transitions are allowed using RXON_ASSOC */
896
897	/* Check if we are not switching bands */
898	CHK_NEQ(staging->flags & RXON_FLG_BAND_24G_MSK,
899		active->flags & RXON_FLG_BAND_24G_MSK);
900
901	/* Check if we are switching association toggle */
902	CHK_NEQ(staging->filter_flags & RXON_FILTER_ASSOC_MSK,
903		active->filter_flags & RXON_FILTER_ASSOC_MSK);
904
905#undef CHK
906#undef CHK_NEQ
907
908	return 0;
909}
910
911#ifdef CONFIG_IWLWIFI_DEBUG
912void iwl_print_rx_config_cmd(struct iwl_priv *priv,
913			     enum iwl_rxon_context_id ctxid)
914{
915	struct iwl_rxon_context *ctx = &priv->contexts[ctxid];
916	struct iwl_rxon_cmd *rxon = &ctx->staging;
917
918	IWL_DEBUG_RADIO(priv, "RX CONFIG:\n");
919	iwl_print_hex_dump(priv, IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
920	IWL_DEBUG_RADIO(priv, "u16 channel: 0x%x\n",
921			le16_to_cpu(rxon->channel));
922	IWL_DEBUG_RADIO(priv, "u32 flags: 0x%08X\n",
923			le32_to_cpu(rxon->flags));
924	IWL_DEBUG_RADIO(priv, "u32 filter_flags: 0x%08x\n",
925			le32_to_cpu(rxon->filter_flags));
926	IWL_DEBUG_RADIO(priv, "u8 dev_type: 0x%x\n", rxon->dev_type);
927	IWL_DEBUG_RADIO(priv, "u8 ofdm_basic_rates: 0x%02x\n",
928			rxon->ofdm_basic_rates);
929	IWL_DEBUG_RADIO(priv, "u8 cck_basic_rates: 0x%02x\n",
930			rxon->cck_basic_rates);
931	IWL_DEBUG_RADIO(priv, "u8[6] node_addr: %pM\n", rxon->node_addr);
932	IWL_DEBUG_RADIO(priv, "u8[6] bssid_addr: %pM\n", rxon->bssid_addr);
933	IWL_DEBUG_RADIO(priv, "u16 assoc_id: 0x%x\n",
934			le16_to_cpu(rxon->assoc_id));
935}
936#endif
937
938static void iwl_calc_basic_rates(struct iwl_priv *priv,
939				 struct iwl_rxon_context *ctx)
940{
941	int lowest_present_ofdm = 100;
942	int lowest_present_cck = 100;
943	u8 cck = 0;
944	u8 ofdm = 0;
945
946	if (ctx->vif) {
947		struct ieee80211_supported_band *sband;
948		unsigned long basic = ctx->vif->bss_conf.basic_rates;
949		int i;
950
951		sband = priv->hw->wiphy->bands[priv->hw->conf.chandef.chan->band];
952
953		for_each_set_bit(i, &basic, BITS_PER_LONG) {
954			int hw = sband->bitrates[i].hw_value;
955			if (hw >= IWL_FIRST_OFDM_RATE) {
956				ofdm |= BIT(hw - IWL_FIRST_OFDM_RATE);
957				if (lowest_present_ofdm > hw)
958					lowest_present_ofdm = hw;
959			} else {
960				BUILD_BUG_ON(IWL_FIRST_CCK_RATE != 0);
961
962				cck |= BIT(hw);
963				if (lowest_present_cck > hw)
964					lowest_present_cck = hw;
965			}
966		}
967	}
968
969	/*
970	 * Now we've got the basic rates as bitmaps in the ofdm and cck
971	 * variables. This isn't sufficient though, as there might not
972	 * be all the right rates in the bitmap. E.g. if the only basic
973	 * rates are 5.5 Mbps and 11 Mbps, we still need to add 1 Mbps
974	 * and 6 Mbps because the 802.11-2007 standard says in 9.6:
975	 *
976	 *    [...] a STA responding to a received frame shall transmit
977	 *    its Control Response frame [...] at the highest rate in the
978	 *    BSSBasicRateSet parameter that is less than or equal to the
979	 *    rate of the immediately previous frame in the frame exchange
980	 *    sequence ([...]) and that is of the same modulation class
981	 *    ([...]) as the received frame. If no rate contained in the
982	 *    BSSBasicRateSet parameter meets these conditions, then the
983	 *    control frame sent in response to a received frame shall be
984	 *    transmitted at the highest mandatory rate of the PHY that is
985	 *    less than or equal to the rate of the received frame, and
986	 *    that is of the same modulation class as the received frame.
987	 *
988	 * As a consequence, we need to add all mandatory rates that are
989	 * lower than all of the basic rates to these bitmaps.
990	 */
991
992	if (IWL_RATE_24M_INDEX < lowest_present_ofdm)
993		ofdm |= IWL_RATE_24M_MASK >> IWL_FIRST_OFDM_RATE;
994	if (IWL_RATE_12M_INDEX < lowest_present_ofdm)
995		ofdm |= IWL_RATE_12M_MASK >> IWL_FIRST_OFDM_RATE;
996	/* 6M already there or needed so always add */
997	ofdm |= IWL_RATE_6M_MASK >> IWL_FIRST_OFDM_RATE;
998
999	/*
1000	 * CCK is a bit more complex with DSSS vs. HR/DSSS vs. ERP.
1001	 * Note, however:
1002	 *  - if no CCK rates are basic, it must be ERP since there must
1003	 *    be some basic rates at all, so they're OFDM => ERP PHY
1004	 *    (or we're in 5 GHz, and the cck bitmap will never be used)
1005	 *  - if 11M is a basic rate, it must be ERP as well, so add 5.5M
1006	 *  - if 5.5M is basic, 1M and 2M are mandatory
1007	 *  - if 2M is basic, 1M is mandatory
1008	 *  - if 1M is basic, that's the only valid ACK rate.
1009	 * As a consequence, it's not as complicated as it sounds, just add
1010	 * any lower rates to the ACK rate bitmap.
1011	 */
1012	if (IWL_RATE_11M_INDEX < lowest_present_cck)
1013		cck |= IWL_RATE_11M_MASK >> IWL_FIRST_CCK_RATE;
1014	if (IWL_RATE_5M_INDEX < lowest_present_cck)
1015		cck |= IWL_RATE_5M_MASK >> IWL_FIRST_CCK_RATE;
1016	if (IWL_RATE_2M_INDEX < lowest_present_cck)
1017		cck |= IWL_RATE_2M_MASK >> IWL_FIRST_CCK_RATE;
1018	/* 1M already there or needed so always add */
1019	cck |= IWL_RATE_1M_MASK >> IWL_FIRST_CCK_RATE;
1020
1021	IWL_DEBUG_RATE(priv, "Set basic rates cck:0x%.2x ofdm:0x%.2x\n",
1022		       cck, ofdm);
1023
1024	/* "basic_rates" is a misnomer here -- should be called ACK rates */
1025	ctx->staging.cck_basic_rates = cck;
1026	ctx->staging.ofdm_basic_rates = ofdm;
1027}
1028
1029/**
1030 * iwlagn_commit_rxon - commit staging_rxon to hardware
1031 *
1032 * The RXON command in staging_rxon is committed to the hardware and
1033 * the active_rxon structure is updated with the new data.  This
1034 * function correctly transitions out of the RXON_ASSOC_MSK state if
1035 * a HW tune is required based on the RXON structure changes.
1036 *
1037 * The connect/disconnect flow should be as the following:
1038 *
1039 * 1. make sure send RXON command with association bit unset if not connect
1040 *	this should include the channel and the band for the candidate
1041 *	to be connected to
1042 * 2. Add Station before RXON association with the AP
1043 * 3. RXON_timing has to send before RXON for connection
1044 * 4. full RXON command - associated bit set
1045 * 5. use RXON_ASSOC command to update any flags changes
1046 */
1047int iwlagn_commit_rxon(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
1048{
1049	/* cast away the const for active_rxon in this function */
1050	struct iwl_rxon_cmd *active = (void *)&ctx->active;
1051	bool new_assoc = !!(ctx->staging.filter_flags & RXON_FILTER_ASSOC_MSK);
1052	int ret;
1053
1054	lockdep_assert_held(&priv->mutex);
1055
1056	if (!iwl_is_alive(priv))
1057		return -EBUSY;
1058
1059	/* This function hardcodes a bunch of dual-mode assumptions */
1060	BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
1061
1062	if (!ctx->is_active)
1063		return 0;
1064
1065	/* always get timestamp with Rx frame */
1066	ctx->staging.flags |= RXON_FLG_TSF2HOST_MSK;
1067
1068	/* recalculate basic rates */
1069	iwl_calc_basic_rates(priv, ctx);
1070
1071	/*
1072	 * force CTS-to-self frames protection if RTS-CTS is not preferred
1073	 * one aggregation protection method
1074	 */
1075	if (!priv->hw_params.use_rts_for_aggregation)
1076		ctx->staging.flags |= RXON_FLG_SELF_CTS_EN;
1077
1078	if ((ctx->vif && ctx->vif->bss_conf.use_short_slot) ||
1079	    !(ctx->staging.flags & RXON_FLG_BAND_24G_MSK))
1080		ctx->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
1081	else
1082		ctx->staging.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
1083
1084	iwl_print_rx_config_cmd(priv, ctx->ctxid);
1085	ret = iwl_check_rxon_cmd(priv, ctx);
1086	if (ret) {
1087		IWL_ERR(priv, "Invalid RXON configuration. Not committing.\n");
1088		return -EINVAL;
1089	}
1090
1091	/*
1092	 * receive commit_rxon request
1093	 * abort any previous channel switch if still in process
1094	 */
1095	if (test_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status) &&
1096	    (priv->switch_channel != ctx->staging.channel)) {
1097		IWL_DEBUG_11H(priv, "abort channel switch on %d\n",
1098			      le16_to_cpu(priv->switch_channel));
1099		iwl_chswitch_done(priv, false);
1100	}
1101
1102	/*
1103	 * If we don't need to send a full RXON, we can use
1104	 * iwl_rxon_assoc_cmd which is used to reconfigure filter
1105	 * and other flags for the current radio configuration.
1106	 */
1107	if (!iwl_full_rxon_required(priv, ctx)) {
1108		ret = iwlagn_send_rxon_assoc(priv, ctx);
1109		if (ret) {
1110			IWL_ERR(priv, "Error setting RXON_ASSOC (%d)\n", ret);
1111			return ret;
1112		}
1113
1114		memcpy(active, &ctx->staging, sizeof(*active));
1115		/*
1116		 * We do not commit tx power settings while channel changing,
1117		 * do it now if after settings changed.
1118		 */
1119		iwl_set_tx_power(priv, priv->tx_power_next, false);
1120
1121		/* make sure we are in the right PS state */
1122		iwl_power_update_mode(priv, true);
1123
1124		return 0;
1125	}
1126
1127	iwl_set_rxon_hwcrypto(priv, ctx, !iwlwifi_mod_params.sw_crypto);
1128
1129	IWL_DEBUG_INFO(priv,
1130		       "Going to commit RXON\n"
1131		       "  * with%s RXON_FILTER_ASSOC_MSK\n"
1132		       "  * channel = %d\n"
1133		       "  * bssid = %pM\n",
1134		       (new_assoc ? "" : "out"),
1135		       le16_to_cpu(ctx->staging.channel),
1136		       ctx->staging.bssid_addr);
1137
1138	/*
1139	 * Always clear associated first, but with the correct config.
1140	 * This is required as for example station addition for the
1141	 * AP station must be done after the BSSID is set to correctly
1142	 * set up filters in the device.
1143	 */
1144	ret = iwlagn_rxon_disconn(priv, ctx);
1145	if (ret)
1146		return ret;
1147
1148	ret = iwlagn_set_pan_params(priv);
1149	if (ret)
1150		return ret;
1151
1152	if (new_assoc)
1153		return iwlagn_rxon_connect(priv, ctx);
1154
1155	return 0;
1156}
1157
1158void iwlagn_config_ht40(struct ieee80211_conf *conf,
1159			struct iwl_rxon_context *ctx)
1160{
1161	if (conf_is_ht40_minus(conf)) {
1162		ctx->ht.extension_chan_offset =
1163			IEEE80211_HT_PARAM_CHA_SEC_BELOW;
1164		ctx->ht.is_40mhz = true;
1165	} else if (conf_is_ht40_plus(conf)) {
1166		ctx->ht.extension_chan_offset =
1167			IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
1168		ctx->ht.is_40mhz = true;
1169	} else {
1170		ctx->ht.extension_chan_offset =
1171			IEEE80211_HT_PARAM_CHA_SEC_NONE;
1172		ctx->ht.is_40mhz = false;
1173	}
1174}
1175
1176int iwlagn_mac_config(struct ieee80211_hw *hw, u32 changed)
1177{
1178	struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1179	struct iwl_rxon_context *ctx;
1180	struct ieee80211_conf *conf = &hw->conf;
1181	struct ieee80211_channel *channel = conf->chandef.chan;
1182	int ret = 0;
1183
1184	IWL_DEBUG_MAC80211(priv, "enter: changed %#x\n", changed);
1185
1186	mutex_lock(&priv->mutex);
1187
1188	if (unlikely(test_bit(STATUS_SCANNING, &priv->status))) {
1189		IWL_DEBUG_MAC80211(priv, "leave - scanning\n");
1190		goto out;
1191	}
1192
1193	if (!iwl_is_ready(priv)) {
1194		IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
1195		goto out;
1196	}
1197
1198	if (changed & (IEEE80211_CONF_CHANGE_SMPS |
1199		       IEEE80211_CONF_CHANGE_CHANNEL)) {
1200		/* mac80211 uses static for non-HT which is what we want */
1201		priv->current_ht_config.smps = conf->smps_mode;
1202
1203		/*
1204		 * Recalculate chain counts.
1205		 *
1206		 * If monitor mode is enabled then mac80211 will
1207		 * set up the SM PS mode to OFF if an HT channel is
1208		 * configured.
1209		 */
1210		for_each_context(priv, ctx)
1211			iwlagn_set_rxon_chain(priv, ctx);
1212	}
1213
1214	if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
1215		for_each_context(priv, ctx) {
1216			/* Configure HT40 channels */
1217			if (ctx->ht.enabled != conf_is_ht(conf))
1218				ctx->ht.enabled = conf_is_ht(conf);
1219
1220			if (ctx->ht.enabled) {
1221				/* if HT40 is used, it should not change
1222				 * after associated except channel switch */
1223				if (!ctx->ht.is_40mhz ||
1224						!iwl_is_associated_ctx(ctx))
1225					iwlagn_config_ht40(conf, ctx);
1226			} else
1227				ctx->ht.is_40mhz = false;
1228
1229			/*
1230			 * Default to no protection. Protection mode will
1231			 * later be set from BSS config in iwl_ht_conf
1232			 */
1233			ctx->ht.protection = IEEE80211_HT_OP_MODE_PROTECTION_NONE;
1234
1235			/* if we are switching from ht to 2.4 clear flags
1236			 * from any ht related info since 2.4 does not
1237			 * support ht */
1238			if (le16_to_cpu(ctx->staging.channel) !=
1239			    channel->hw_value)
1240				ctx->staging.flags = 0;
1241
1242			iwl_set_rxon_channel(priv, channel, ctx);
1243			iwl_set_rxon_ht(priv, &priv->current_ht_config);
1244
1245			iwl_set_flags_for_band(priv, ctx, channel->band,
1246					       ctx->vif);
1247		}
1248
1249		iwl_update_bcast_stations(priv);
1250	}
1251
1252	if (changed & (IEEE80211_CONF_CHANGE_PS |
1253			IEEE80211_CONF_CHANGE_IDLE)) {
1254		ret = iwl_power_update_mode(priv, false);
1255		if (ret)
1256			IWL_DEBUG_MAC80211(priv, "Error setting sleep level\n");
1257	}
1258
1259	if (changed & IEEE80211_CONF_CHANGE_POWER) {
1260		IWL_DEBUG_MAC80211(priv, "TX Power old=%d new=%d\n",
1261			priv->tx_power_user_lmt, conf->power_level);
1262
1263		iwl_set_tx_power(priv, conf->power_level, false);
1264	}
1265
1266	for_each_context(priv, ctx) {
1267		if (!memcmp(&ctx->staging, &ctx->active, sizeof(ctx->staging)))
1268			continue;
1269		iwlagn_commit_rxon(priv, ctx);
1270	}
1271 out:
1272	mutex_unlock(&priv->mutex);
1273	IWL_DEBUG_MAC80211(priv, "leave\n");
1274
1275	return ret;
1276}
1277
1278static void iwlagn_check_needed_chains(struct iwl_priv *priv,
1279				       struct iwl_rxon_context *ctx,
1280				       struct ieee80211_bss_conf *bss_conf)
1281{
1282	struct ieee80211_vif *vif = ctx->vif;
1283	struct iwl_rxon_context *tmp;
1284	struct ieee80211_sta *sta;
1285	struct iwl_ht_config *ht_conf = &priv->current_ht_config;
1286	struct ieee80211_sta_ht_cap *ht_cap;
1287	bool need_multiple;
1288
1289	lockdep_assert_held(&priv->mutex);
1290
1291	switch (vif->type) {
1292	case NL80211_IFTYPE_STATION:
1293		rcu_read_lock();
1294		sta = ieee80211_find_sta(vif, bss_conf->bssid);
1295		if (!sta) {
1296			/*
1297			 * If at all, this can only happen through a race
1298			 * when the AP disconnects us while we're still
1299			 * setting up the connection, in that case mac80211
1300			 * will soon tell us about that.
1301			 */
1302			need_multiple = false;
1303			rcu_read_unlock();
1304			break;
1305		}
1306
1307		ht_cap = &sta->ht_cap;
1308
1309		need_multiple = true;
1310
1311		/*
1312		 * If the peer advertises no support for receiving 2 and 3
1313		 * stream MCS rates, it can't be transmitting them either.
1314		 */
1315		if (ht_cap->mcs.rx_mask[1] == 0 &&
1316		    ht_cap->mcs.rx_mask[2] == 0) {
1317			need_multiple = false;
1318		} else if (!(ht_cap->mcs.tx_params &
1319						IEEE80211_HT_MCS_TX_DEFINED)) {
1320			/* If it can't TX MCS at all ... */
1321			need_multiple = false;
1322		} else if (ht_cap->mcs.tx_params &
1323						IEEE80211_HT_MCS_TX_RX_DIFF) {
1324			int maxstreams;
1325
1326			/*
1327			 * But if it can receive them, it might still not
1328			 * be able to transmit them, which is what we need
1329			 * to check here -- so check the number of streams
1330			 * it advertises for TX (if different from RX).
1331			 */
1332
1333			maxstreams = (ht_cap->mcs.tx_params &
1334				 IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK);
1335			maxstreams >>=
1336				IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT;
1337			maxstreams += 1;
1338
1339			if (maxstreams <= 1)
1340				need_multiple = false;
1341		}
1342
1343		rcu_read_unlock();
1344		break;
1345	case NL80211_IFTYPE_ADHOC:
1346		/* currently */
1347		need_multiple = false;
1348		break;
1349	default:
1350		/* only AP really */
1351		need_multiple = true;
1352		break;
1353	}
1354
1355	ctx->ht_need_multiple_chains = need_multiple;
1356
1357	if (!need_multiple) {
1358		/* check all contexts */
1359		for_each_context(priv, tmp) {
1360			if (!tmp->vif)
1361				continue;
1362			if (tmp->ht_need_multiple_chains) {
1363				need_multiple = true;
1364				break;
1365			}
1366		}
1367	}
1368
1369	ht_conf->single_chain_sufficient = !need_multiple;
1370}
1371
1372static void iwlagn_chain_noise_reset(struct iwl_priv *priv)
1373{
1374	struct iwl_chain_noise_data *data = &priv->chain_noise_data;
1375	int ret;
1376
1377	if (priv->calib_disabled & IWL_CHAIN_NOISE_CALIB_DISABLED)
1378		return;
1379
1380	if ((data->state == IWL_CHAIN_NOISE_ALIVE) &&
1381	    iwl_is_any_associated(priv)) {
1382		struct iwl_calib_chain_noise_reset_cmd cmd;
1383
1384		/* clear data for chain noise calibration algorithm */
1385		data->chain_noise_a = 0;
1386		data->chain_noise_b = 0;
1387		data->chain_noise_c = 0;
1388		data->chain_signal_a = 0;
1389		data->chain_signal_b = 0;
1390		data->chain_signal_c = 0;
1391		data->beacon_count = 0;
1392
1393		memset(&cmd, 0, sizeof(cmd));
1394		iwl_set_calib_hdr(&cmd.hdr,
1395			priv->phy_calib_chain_noise_reset_cmd);
1396		ret = iwl_dvm_send_cmd_pdu(priv,
1397					REPLY_PHY_CALIBRATION_CMD,
1398					0, sizeof(cmd), &cmd);
1399		if (ret)
1400			IWL_ERR(priv,
1401				"Could not send REPLY_PHY_CALIBRATION_CMD\n");
1402		data->state = IWL_CHAIN_NOISE_ACCUMULATE;
1403		IWL_DEBUG_CALIB(priv, "Run chain_noise_calibrate\n");
1404	}
1405}
1406
1407void iwlagn_bss_info_changed(struct ieee80211_hw *hw,
1408			     struct ieee80211_vif *vif,
1409			     struct ieee80211_bss_conf *bss_conf,
1410			     u32 changes)
1411{
1412	struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1413	struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1414	int ret;
1415	bool force = false;
1416
1417	mutex_lock(&priv->mutex);
1418
1419	if (changes & BSS_CHANGED_IDLE && bss_conf->idle) {
1420		/*
1421		 * If we go idle, then clearly no "passive-no-rx"
1422		 * workaround is needed any more, this is a reset.
1423		 */
1424		iwlagn_lift_passive_no_rx(priv);
1425	}
1426
1427	if (unlikely(!iwl_is_ready(priv))) {
1428		IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
1429		mutex_unlock(&priv->mutex);
1430		return;
1431        }
1432
1433	if (unlikely(!ctx->vif)) {
1434		IWL_DEBUG_MAC80211(priv, "leave - vif is NULL\n");
1435		mutex_unlock(&priv->mutex);
1436		return;
1437	}
1438
1439	if (changes & BSS_CHANGED_BEACON_INT)
1440		force = true;
1441
1442	if (changes & BSS_CHANGED_QOS) {
1443		ctx->qos_data.qos_active = bss_conf->qos;
1444		iwlagn_update_qos(priv, ctx);
1445	}
1446
1447	ctx->staging.assoc_id = cpu_to_le16(vif->bss_conf.aid);
1448	if (vif->bss_conf.use_short_preamble)
1449		ctx->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
1450	else
1451		ctx->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
1452
1453	if (changes & BSS_CHANGED_ASSOC) {
1454		if (bss_conf->assoc) {
1455			priv->timestamp = bss_conf->sync_tsf;
1456			ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
1457		} else {
1458			ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
1459
1460			if (ctx->ctxid == IWL_RXON_CTX_BSS)
1461				priv->have_rekey_data = false;
1462		}
1463
1464		iwlagn_bt_coex_rssi_monitor(priv);
1465	}
1466
1467	if (ctx->ht.enabled) {
1468		ctx->ht.protection = bss_conf->ht_operation_mode &
1469					IEEE80211_HT_OP_MODE_PROTECTION;
1470		ctx->ht.non_gf_sta_present = !!(bss_conf->ht_operation_mode &
1471					IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT);
1472		iwlagn_check_needed_chains(priv, ctx, bss_conf);
1473		iwl_set_rxon_ht(priv, &priv->current_ht_config);
1474	}
1475
1476	iwlagn_set_rxon_chain(priv, ctx);
1477
1478	if (bss_conf->use_cts_prot && (priv->band != IEEE80211_BAND_5GHZ))
1479		ctx->staging.flags |= RXON_FLG_TGG_PROTECT_MSK;
1480	else
1481		ctx->staging.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
1482
1483	if (bss_conf->use_cts_prot)
1484		ctx->staging.flags |= RXON_FLG_SELF_CTS_EN;
1485	else
1486		ctx->staging.flags &= ~RXON_FLG_SELF_CTS_EN;
1487
1488	memcpy(ctx->staging.bssid_addr, bss_conf->bssid, ETH_ALEN);
1489
1490	if (vif->type == NL80211_IFTYPE_AP ||
1491	    vif->type == NL80211_IFTYPE_ADHOC) {
1492		if (vif->bss_conf.enable_beacon) {
1493			ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
1494			priv->beacon_ctx = ctx;
1495		} else {
1496			ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
1497			priv->beacon_ctx = NULL;
1498		}
1499	}
1500
1501	/*
1502	 * If the ucode decides to do beacon filtering before
1503	 * association, it will lose beacons that are needed
1504	 * before sending frames out on passive channels. This
1505	 * causes association failures on those channels. Enable
1506	 * receiving beacons in such cases.
1507	 */
1508
1509	if (vif->type == NL80211_IFTYPE_STATION) {
1510		if (!bss_conf->assoc)
1511			ctx->staging.filter_flags |= RXON_FILTER_BCON_AWARE_MSK;
1512		else
1513			ctx->staging.filter_flags &=
1514						    ~RXON_FILTER_BCON_AWARE_MSK;
1515	}
1516
1517	if (force || memcmp(&ctx->staging, &ctx->active, sizeof(ctx->staging)))
1518		iwlagn_commit_rxon(priv, ctx);
1519
1520	if (changes & BSS_CHANGED_ASSOC && bss_conf->assoc) {
1521		/*
1522		 * The chain noise calibration will enable PM upon
1523		 * completion. If calibration has already been run
1524		 * then we need to enable power management here.
1525		 */
1526		if (priv->chain_noise_data.state == IWL_CHAIN_NOISE_DONE)
1527			iwl_power_update_mode(priv, false);
1528
1529		/* Enable RX differential gain and sensitivity calibrations */
1530		iwlagn_chain_noise_reset(priv);
1531		priv->start_calib = 1;
1532	}
1533
1534	if (changes & BSS_CHANGED_IBSS) {
1535		ret = iwlagn_manage_ibss_station(priv, vif,
1536						 bss_conf->ibss_joined);
1537		if (ret)
1538			IWL_ERR(priv, "failed to %s IBSS station %pM\n",
1539				bss_conf->ibss_joined ? "add" : "remove",
1540				bss_conf->bssid);
1541	}
1542
1543	if (changes & BSS_CHANGED_BEACON && priv->beacon_ctx == ctx) {
1544		if (iwlagn_update_beacon(priv, vif))
1545			IWL_ERR(priv, "Error updating beacon\n");
1546	}
1547
1548	mutex_unlock(&priv->mutex);
1549}
1550
1551void iwlagn_post_scan(struct iwl_priv *priv)
1552{
1553	struct iwl_rxon_context *ctx;
1554
1555	/*
1556	 * We do not commit power settings while scan is pending,
1557	 * do it now if the settings changed.
1558	 */
1559	iwl_power_set_mode(priv, &priv->power_data.sleep_cmd_next, false);
1560	iwl_set_tx_power(priv, priv->tx_power_next, false);
1561
1562	/*
1563	 * Since setting the RXON may have been deferred while
1564	 * performing the scan, fire one off if needed
1565	 */
1566	for_each_context(priv, ctx)
1567		if (memcmp(&ctx->staging, &ctx->active, sizeof(ctx->staging)))
1568			iwlagn_commit_rxon(priv, ctx);
1569
1570	iwlagn_set_pan_params(priv);
1571}
1572