sta.c

   1// SPDX-License-Identifier: GPL-2.0-only
   2/*
   3 * Mac80211 STA API for ST-Ericsson CW1200 drivers
   4 *
   5 * Copyright (c) 2010, ST-Ericsson
   6 * Author: Dmitry Tarnyagin <dmitry.tarnyagin@lockless.no>
   7 */
   8
   9#include <linux/vmalloc.h>
  10#include <linux/sched.h>
  11#include <linux/firmware.h>
  12#include <linux/module.h>
  13#include <linux/etherdevice.h>
  14
  15#include "cw1200.h"
  16#include "sta.h"
  17#include "fwio.h"
  18#include "bh.h"
  19#include "debug.h"
  20
  21#ifndef ERP_INFO_BYTE_OFFSET
  22#define ERP_INFO_BYTE_OFFSET 2
  23#endif
  24
  25static void cw1200_do_join(struct cw1200_common *priv);
  26static void cw1200_do_unjoin(struct cw1200_common *priv);
  27
  28static int cw1200_upload_beacon(struct cw1200_common *priv);
  29static int cw1200_upload_pspoll(struct cw1200_common *priv);
  30static int cw1200_upload_null(struct cw1200_common *priv);
  31static int cw1200_upload_qosnull(struct cw1200_common *priv);
  32static int cw1200_start_ap(struct cw1200_common *priv);
  33static int cw1200_update_beaconing(struct cw1200_common *priv);
  34static int cw1200_enable_beaconing(struct cw1200_common *priv,
  35				   bool enable);
  36static void __cw1200_sta_notify(struct ieee80211_hw *dev,
  37				struct ieee80211_vif *vif,
  38				enum sta_notify_cmd notify_cmd,
  39				int link_id);
  40static int __cw1200_flush(struct cw1200_common *priv, bool drop);
  41
  42static inline void __cw1200_free_event_queue(struct list_head *list)
  43{
  44	struct cw1200_wsm_event *event, *tmp;
  45	list_for_each_entry_safe(event, tmp, list, link) {
  46		list_del(&event->link);
  47		kfree(event);
  48	}
  49}
  50
  51/* ******************************************************************** */
  52/* STA API								*/
  53
  54int cw1200_start(struct ieee80211_hw *dev)
  55{
  56	struct cw1200_common *priv = dev->priv;
  57	int ret = 0;
  58
  59	cw1200_pm_stay_awake(&priv->pm_state, HZ);
  60
  61	mutex_lock(&priv->conf_mutex);
  62
  63	/* default EDCA */
  64	WSM_EDCA_SET(&priv->edca, 0, 0x0002, 0x0003, 0x0007, 47, 0xc8, false);
  65	WSM_EDCA_SET(&priv->edca, 1, 0x0002, 0x0007, 0x000f, 94, 0xc8, false);
  66	WSM_EDCA_SET(&priv->edca, 2, 0x0003, 0x000f, 0x03ff, 0, 0xc8, false);
  67	WSM_EDCA_SET(&priv->edca, 3, 0x0007, 0x000f, 0x03ff, 0, 0xc8, false);
  68	ret = wsm_set_edca_params(priv, &priv->edca);
  69	if (ret)
  70		goto out;
  71
  72	ret = cw1200_set_uapsd_param(priv, &priv->edca);
  73	if (ret)
  74		goto out;
  75
  76	priv->setbssparams_done = false;
  77
  78	memcpy(priv->mac_addr, dev->wiphy->perm_addr, ETH_ALEN);
  79	priv->mode = NL80211_IFTYPE_MONITOR;
  80	priv->wep_default_key_id = -1;
  81
  82	priv->cqm_beacon_loss_count = 10;
  83
  84	ret = cw1200_setup_mac(priv);
  85	if (ret)
  86		goto out;
  87
  88out:
  89	mutex_unlock(&priv->conf_mutex);
  90	return ret;
  91}
  92
  93void cw1200_stop(struct ieee80211_hw *dev, bool suspend)
  94{
  95	struct cw1200_common *priv = dev->priv;
  96	LIST_HEAD(list);
  97	int i;
  98
  99	wsm_lock_tx(priv);
 100
 101	while (down_trylock(&priv->scan.lock)) {
 102		/* Scan is in progress. Force it to stop. */
 103		priv->scan.req = NULL;
 104		schedule();
 105	}
 106	up(&priv->scan.lock);
 107
 108	cancel_delayed_work_sync(&priv->scan.probe_work);
 109	cancel_delayed_work_sync(&priv->scan.timeout);
 110	cancel_delayed_work_sync(&priv->clear_recent_scan_work);
 111	cancel_delayed_work_sync(&priv->join_timeout);
 112	cw1200_cqm_bssloss_sm(priv, 0, 0, 0);
 113	cancel_work_sync(&priv->unjoin_work);
 114	cancel_delayed_work_sync(&priv->link_id_gc_work);
 115	flush_workqueue(priv->workqueue);
 116	timer_delete_sync(&priv->mcast_timeout);
 117	mutex_lock(&priv->conf_mutex);
 118	priv->mode = NL80211_IFTYPE_UNSPECIFIED;
 119	priv->listening = false;
 120
 121	spin_lock(&priv->event_queue_lock);
 122	list_splice_init(&priv->event_queue, &list);
 123	spin_unlock(&priv->event_queue_lock);
 124	__cw1200_free_event_queue(&list);
 125
 126
 127	priv->join_status = CW1200_JOIN_STATUS_PASSIVE;
 128	priv->join_pending = false;
 129
 130	for (i = 0; i < 4; i++)
 131		cw1200_queue_clear(&priv->tx_queue[i]);
 132	mutex_unlock(&priv->conf_mutex);
 133	tx_policy_clean(priv);
 134
 135	/* HACK! */
 136	if (atomic_xchg(&priv->tx_lock, 1) != 1)
 137		pr_debug("[STA] TX is force-unlocked due to stop request.\n");
 138
 139	wsm_unlock_tx(priv);
 140	atomic_xchg(&priv->tx_lock, 0); /* for recovery to work */
 141}
 142
 143static int cw1200_bssloss_mitigation = 1;
 144module_param(cw1200_bssloss_mitigation, int, 0644);
 145MODULE_PARM_DESC(cw1200_bssloss_mitigation, "BSS Loss mitigation. 0 == disabled, 1 == enabled (default)");
 146
 147
 148void __cw1200_cqm_bssloss_sm(struct cw1200_common *priv,
 149			     int init, int good, int bad)
 150{
 151	int tx = 0;
 152
 153	priv->delayed_link_loss = 0;
 154	cancel_work_sync(&priv->bss_params_work);
 155
 156	pr_debug("[STA] CQM BSSLOSS_SM: state: %d init %d good %d bad: %d txlock: %d uj: %d\n",
 157		 priv->bss_loss_state,
 158		 init, good, bad,
 159		 atomic_read(&priv->tx_lock),
 160		 priv->delayed_unjoin);
 161
 162	/* If we have a pending unjoin */
 163	if (priv->delayed_unjoin)
 164		return;
 165
 166	if (init) {
 167		queue_delayed_work(priv->workqueue,
 168				   &priv->bss_loss_work,
 169				   HZ);
 170		priv->bss_loss_state = 0;
 171
 172		/* Skip the confimration procedure in P2P case */
 173		if (!priv->vif->p2p && !atomic_read(&priv->tx_lock))
 174			tx = 1;
 175	} else if (good) {
 176		cancel_delayed_work_sync(&priv->bss_loss_work);
 177		priv->bss_loss_state = 0;
 178		queue_work(priv->workqueue, &priv->bss_params_work);
 179	} else if (bad) {
 180		/* XXX Should we just keep going until we time out? */
 181		if (priv->bss_loss_state < 3)
 182			tx = 1;
 183	} else {
 184		cancel_delayed_work_sync(&priv->bss_loss_work);
 185		priv->bss_loss_state = 0;
 186	}
 187
 188	/* Bypass mitigation if it's disabled */
 189	if (!cw1200_bssloss_mitigation)
 190		tx = 0;
 191
 192	/* Spit out a NULL packet to our AP if necessary */
 193	if (tx) {
 194		struct sk_buff *skb;
 195
 196		priv->bss_loss_state++;
 197
 198		skb = ieee80211_nullfunc_get(priv->hw, priv->vif, -1, false);
 199		WARN_ON(!skb);
 200		if (skb)
 201			cw1200_tx(priv->hw, NULL, skb);
 202	}
 203}
 204
 205int cw1200_add_interface(struct ieee80211_hw *dev,
 206			 struct ieee80211_vif *vif)
 207{
 208	int ret;
 209	struct cw1200_common *priv = dev->priv;
 210	/* __le32 auto_calibration_mode = __cpu_to_le32(1); */
 211
 212	vif->driver_flags |= IEEE80211_VIF_BEACON_FILTER |
 213			     IEEE80211_VIF_SUPPORTS_UAPSD |
 214			     IEEE80211_VIF_SUPPORTS_CQM_RSSI;
 215
 216	mutex_lock(&priv->conf_mutex);
 217
 218	if (priv->mode != NL80211_IFTYPE_MONITOR) {
 219		mutex_unlock(&priv->conf_mutex);
 220		return -EOPNOTSUPP;
 221	}
 222
 223	switch (vif->type) {
 224	case NL80211_IFTYPE_STATION:
 225	case NL80211_IFTYPE_ADHOC:
 226	case NL80211_IFTYPE_MESH_POINT:
 227	case NL80211_IFTYPE_AP:
 228		priv->mode = vif->type;
 229		break;
 230	default:
 231		mutex_unlock(&priv->conf_mutex);
 232		return -EOPNOTSUPP;
 233	}
 234
 235	priv->vif = vif;
 236	memcpy(priv->mac_addr, vif->addr, ETH_ALEN);
 237	ret = cw1200_setup_mac(priv);
 238	/* Enable auto-calibration */
 239	/* Exception in subsequent channel switch; disabled.
 240	 *  wsm_write_mib(priv, WSM_MIB_ID_SET_AUTO_CALIBRATION_MODE,
 241	 *      &auto_calibration_mode, sizeof(auto_calibration_mode));
 242	*/
 243
 244	mutex_unlock(&priv->conf_mutex);
 245	return ret;
 246}
 247
 248void cw1200_remove_interface(struct ieee80211_hw *dev,
 249			     struct ieee80211_vif *vif)
 250{
 251	struct cw1200_common *priv = dev->priv;
 252	struct wsm_reset reset = {
 253		.reset_statistics = true,
 254	};
 255	int i;
 256
 257	mutex_lock(&priv->conf_mutex);
 258	switch (priv->join_status) {
 259	case CW1200_JOIN_STATUS_JOINING:
 260	case CW1200_JOIN_STATUS_PRE_STA:
 261	case CW1200_JOIN_STATUS_STA:
 262	case CW1200_JOIN_STATUS_IBSS:
 263		wsm_lock_tx(priv);
 264		if (queue_work(priv->workqueue, &priv->unjoin_work) <= 0)
 265			wsm_unlock_tx(priv);
 266		break;
 267	case CW1200_JOIN_STATUS_AP:
 268		for (i = 0; priv->link_id_map; ++i) {
 269			if (priv->link_id_map & BIT(i)) {
 270				reset.link_id = i;
 271				wsm_reset(priv, &reset);
 272				priv->link_id_map &= ~BIT(i);
 273			}
 274		}
 275		memset(priv->link_id_db, 0, sizeof(priv->link_id_db));
 276		priv->sta_asleep_mask = 0;
 277		priv->enable_beacon = false;
 278		priv->tx_multicast = false;
 279		priv->aid0_bit_set = false;
 280		priv->buffered_multicasts = false;
 281		priv->pspoll_mask = 0;
 282		reset.link_id = 0;
 283		wsm_reset(priv, &reset);
 284		break;
 285	case CW1200_JOIN_STATUS_MONITOR:
 286		cw1200_update_listening(priv, false);
 287		break;
 288	default:
 289		break;
 290	}
 291	priv->vif = NULL;
 292	priv->mode = NL80211_IFTYPE_MONITOR;
 293	eth_zero_addr(priv->mac_addr);
 294	memset(&priv->p2p_ps_modeinfo, 0, sizeof(priv->p2p_ps_modeinfo));
 295	cw1200_free_keys(priv);
 296	cw1200_setup_mac(priv);
 297	priv->listening = false;
 298	priv->join_status = CW1200_JOIN_STATUS_PASSIVE;
 299	if (!__cw1200_flush(priv, true))
 300		wsm_unlock_tx(priv);
 301
 302	mutex_unlock(&priv->conf_mutex);
 303}
 304
 305int cw1200_change_interface(struct ieee80211_hw *dev,
 306			    struct ieee80211_vif *vif,
 307			    enum nl80211_iftype new_type,
 308			    bool p2p)
 309{
 310	int ret = 0;
 311	pr_debug("change_interface new: %d (%d), old: %d (%d)\n", new_type,
 312		 p2p, vif->type, vif->p2p);
 313
 314	if (new_type != vif->type || vif->p2p != p2p) {
 315		cw1200_remove_interface(dev, vif);
 316		vif->type = new_type;
 317		vif->p2p = p2p;
 318		ret = cw1200_add_interface(dev, vif);
 319	}
 320
 321	return ret;
 322}
 323
 324int cw1200_config(struct ieee80211_hw *dev, int radio_idx, u32 changed)
 325{
 326	int ret = 0;
 327	struct cw1200_common *priv = dev->priv;
 328	struct ieee80211_conf *conf = &dev->conf;
 329
 330	pr_debug("CONFIG CHANGED:  %08x\n", changed);
 331
 332	down(&priv->scan.lock);
 333	mutex_lock(&priv->conf_mutex);
 334	/* TODO: IEEE80211_CONF_CHANGE_QOS */
 335	/* TODO: IEEE80211_CONF_CHANGE_LISTEN_INTERVAL */
 336
 337	if (changed & IEEE80211_CONF_CHANGE_POWER) {
 338		priv->output_power = conf->power_level;
 339		pr_debug("[STA] TX power: %d\n", priv->output_power);
 340		wsm_set_output_power(priv, priv->output_power * 10);
 341	}
 342
 343	if ((changed & IEEE80211_CONF_CHANGE_CHANNEL) &&
 344	    (priv->channel != conf->chandef.chan)) {
 345		struct ieee80211_channel *ch = conf->chandef.chan;
 346		struct wsm_switch_channel channel = {
 347			.channel_number = ch->hw_value,
 348		};
 349		pr_debug("[STA] Freq %d (wsm ch: %d).\n",
 350			 ch->center_freq, ch->hw_value);
 351
 352		/* __cw1200_flush() implicitly locks tx, if successful */
 353		if (!__cw1200_flush(priv, false)) {
 354			if (!wsm_switch_channel(priv, &channel)) {
 355				ret = wait_event_timeout(priv->channel_switch_done,
 356							 !priv->channel_switch_in_progress,
 357							 3 * HZ);
 358				if (ret) {
 359					/* Already unlocks if successful */
 360					priv->channel = ch;
 361					ret = 0;
 362				} else {
 363					ret = -ETIMEDOUT;
 364				}
 365			} else {
 366				/* Unlock if switch channel fails */
 367				wsm_unlock_tx(priv);
 368			}
 369		}
 370	}
 371
 372	if (changed & IEEE80211_CONF_CHANGE_PS) {
 373		if (!(conf->flags & IEEE80211_CONF_PS))
 374			priv->powersave_mode.mode = WSM_PSM_ACTIVE;
 375		else if (conf->dynamic_ps_timeout <= 0)
 376			priv->powersave_mode.mode = WSM_PSM_PS;
 377		else
 378			priv->powersave_mode.mode = WSM_PSM_FAST_PS;
 379
 380		/* Firmware requires that value for this 1-byte field must
 381		 * be specified in units of 500us. Values above the 128ms
 382		 * threshold are not supported.
 383		 */
 384		if (conf->dynamic_ps_timeout >= 0x80)
 385			priv->powersave_mode.fast_psm_idle_period = 0xFF;
 386		else
 387			priv->powersave_mode.fast_psm_idle_period =
 388					conf->dynamic_ps_timeout << 1;
 389
 390		if (priv->join_status == CW1200_JOIN_STATUS_STA &&
 391		    priv->bss_params.aid)
 392			cw1200_set_pm(priv, &priv->powersave_mode);
 393	}
 394
 395	if (changed & IEEE80211_CONF_CHANGE_MONITOR) {
 396		/* TBD: It looks like it's transparent
 397		 * there's a monitor interface present -- use this
 398		 * to determine for example whether to calculate
 399		 * timestamps for packets or not, do not use instead
 400		 * of filter flags!
 401		 */
 402	}
 403
 404	if (changed & IEEE80211_CONF_CHANGE_IDLE) {
 405		struct wsm_operational_mode mode = {
 406			.power_mode = cw1200_power_mode,
 407			.disable_more_flag_usage = true,
 408		};
 409
 410		wsm_lock_tx(priv);
 411		/* Disable p2p-dev mode forced by TX request */
 412		if ((priv->join_status == CW1200_JOIN_STATUS_MONITOR) &&
 413		    (conf->flags & IEEE80211_CONF_IDLE) &&
 414		    !priv->listening) {
 415			cw1200_disable_listening(priv);
 416			priv->join_status = CW1200_JOIN_STATUS_PASSIVE;
 417		}
 418		wsm_set_operational_mode(priv, &mode);
 419		wsm_unlock_tx(priv);
 420	}
 421
 422	if (changed & IEEE80211_CONF_CHANGE_RETRY_LIMITS) {
 423		pr_debug("[STA] Retry limits: %d (long), %d (short).\n",
 424			 conf->long_frame_max_tx_count,
 425			 conf->short_frame_max_tx_count);
 426		spin_lock_bh(&priv->tx_policy_cache.lock);
 427		priv->long_frame_max_tx_count = conf->long_frame_max_tx_count;
 428		priv->short_frame_max_tx_count =
 429			(conf->short_frame_max_tx_count < 0x0F) ?
 430			conf->short_frame_max_tx_count : 0x0F;
 431		priv->hw->max_rate_tries = priv->short_frame_max_tx_count;
 432		spin_unlock_bh(&priv->tx_policy_cache.lock);
 433	}
 434	mutex_unlock(&priv->conf_mutex);
 435	up(&priv->scan.lock);
 436	return ret;
 437}
 438
 439void cw1200_update_filtering(struct cw1200_common *priv)
 440{
 441	int ret;
 442	bool bssid_filtering = !priv->rx_filter.bssid;
 443	bool is_p2p = priv->vif && priv->vif->p2p;
 444	bool is_sta = priv->vif && NL80211_IFTYPE_STATION == priv->vif->type;
 445
 446	static struct wsm_beacon_filter_control bf_ctrl;
 447	static struct wsm_mib_beacon_filter_table bf_tbl = {
 448		.entry[0].ie_id = WLAN_EID_VENDOR_SPECIFIC,
 449		.entry[0].flags = WSM_BEACON_FILTER_IE_HAS_CHANGED |
 450					WSM_BEACON_FILTER_IE_NO_LONGER_PRESENT |
 451					WSM_BEACON_FILTER_IE_HAS_APPEARED,
 452		.entry[0].oui[0] = 0x50,
 453		.entry[0].oui[1] = 0x6F,
 454		.entry[0].oui[2] = 0x9A,
 455		.entry[1].ie_id = WLAN_EID_HT_OPERATION,
 456		.entry[1].flags = WSM_BEACON_FILTER_IE_HAS_CHANGED |
 457					WSM_BEACON_FILTER_IE_NO_LONGER_PRESENT |
 458					WSM_BEACON_FILTER_IE_HAS_APPEARED,
 459		.entry[2].ie_id = WLAN_EID_ERP_INFO,
 460		.entry[2].flags = WSM_BEACON_FILTER_IE_HAS_CHANGED |
 461					WSM_BEACON_FILTER_IE_NO_LONGER_PRESENT |
 462					WSM_BEACON_FILTER_IE_HAS_APPEARED,
 463	};
 464
 465	if (priv->join_status == CW1200_JOIN_STATUS_PASSIVE)
 466		return;
 467	else if (priv->join_status == CW1200_JOIN_STATUS_MONITOR)
 468		bssid_filtering = false;
 469
 470	if (priv->disable_beacon_filter) {
 471		bf_ctrl.enabled = 0;
 472		bf_ctrl.bcn_count = 1;
 473		bf_tbl.num = __cpu_to_le32(0);
 474	} else if (is_p2p || !is_sta) {
 475		bf_ctrl.enabled = WSM_BEACON_FILTER_ENABLE |
 476			WSM_BEACON_FILTER_AUTO_ERP;
 477		bf_ctrl.bcn_count = 0;
 478		bf_tbl.num = __cpu_to_le32(2);
 479	} else {
 480		bf_ctrl.enabled = WSM_BEACON_FILTER_ENABLE;
 481		bf_ctrl.bcn_count = 0;
 482		bf_tbl.num = __cpu_to_le32(3);
 483	}
 484
 485	/* When acting as p2p client being connected to p2p GO, in order to
 486	 * receive frames from a different p2p device, turn off bssid filter.
 487	 *
 488	 * WARNING: FW dependency!
 489	 * This can only be used with FW WSM371 and its successors.
 490	 * In that FW version even with bssid filter turned off,
 491	 * device will block most of the unwanted frames.
 492	 */
 493	if (is_p2p)
 494		bssid_filtering = false;
 495
 496	ret = wsm_set_rx_filter(priv, &priv->rx_filter);
 497	if (!ret)
 498		ret = wsm_set_beacon_filter_table(priv, &bf_tbl);
 499	if (!ret)
 500		ret = wsm_beacon_filter_control(priv, &bf_ctrl);
 501	if (!ret)
 502		ret = wsm_set_bssid_filtering(priv, bssid_filtering);
 503	if (!ret)
 504		ret = wsm_set_multicast_filter(priv, &priv->multicast_filter);
 505	if (ret)
 506		wiphy_err(priv->hw->wiphy,
 507			  "Update filtering failed: %d.\n", ret);
 508	return;
 509}
 510
 511void cw1200_update_filtering_work(struct work_struct *work)
 512{
 513	struct cw1200_common *priv =
 514		container_of(work, struct cw1200_common,
 515			     update_filtering_work);
 516
 517	cw1200_update_filtering(priv);
 518}
 519
 520void cw1200_set_beacon_wakeup_period_work(struct work_struct *work)
 521{
 522	struct cw1200_common *priv =
 523		container_of(work, struct cw1200_common,
 524			     set_beacon_wakeup_period_work);
 525
 526	wsm_set_beacon_wakeup_period(priv,
 527				     priv->beacon_int * priv->join_dtim_period >
 528				     MAX_BEACON_SKIP_TIME_MS ? 1 :
 529				     priv->join_dtim_period, 0);
 530}
 531
 532u64 cw1200_prepare_multicast(struct ieee80211_hw *hw,
 533			     struct netdev_hw_addr_list *mc_list)
 534{
 535	static u8 broadcast_ipv6[ETH_ALEN] = {
 536		0x33, 0x33, 0x00, 0x00, 0x00, 0x01
 537	};
 538	static u8 broadcast_ipv4[ETH_ALEN] = {
 539		0x01, 0x00, 0x5e, 0x00, 0x00, 0x01
 540	};
 541	struct cw1200_common *priv = hw->priv;
 542	struct netdev_hw_addr *ha;
 543	int count = 0;
 544
 545	/* Disable multicast filtering */
 546	priv->has_multicast_subscription = false;
 547	memset(&priv->multicast_filter, 0x00, sizeof(priv->multicast_filter));
 548
 549	if (netdev_hw_addr_list_count(mc_list) > WSM_MAX_GRP_ADDRTABLE_ENTRIES)
 550		return 0;
 551
 552	/* Enable if requested */
 553	netdev_hw_addr_list_for_each(ha, mc_list) {
 554		pr_debug("[STA] multicast: %pM\n", ha->addr);
 555		memcpy(&priv->multicast_filter.macaddrs[count],
 556		       ha->addr, ETH_ALEN);
 557		if (!ether_addr_equal(ha->addr, broadcast_ipv4) &&
 558		    !ether_addr_equal(ha->addr, broadcast_ipv6))
 559			priv->has_multicast_subscription = true;
 560		count++;
 561	}
 562
 563	if (count) {
 564		priv->multicast_filter.enable = __cpu_to_le32(1);
 565		priv->multicast_filter.num_addrs = __cpu_to_le32(count);
 566	}
 567
 568	return netdev_hw_addr_list_count(mc_list);
 569}
 570
 571void cw1200_configure_filter(struct ieee80211_hw *dev,
 572			     unsigned int changed_flags,
 573			     unsigned int *total_flags,
 574			     u64 multicast)
 575{
 576	struct cw1200_common *priv = dev->priv;
 577	bool listening = !!(*total_flags &
 578			    (FIF_OTHER_BSS |
 579			     FIF_BCN_PRBRESP_PROMISC |
 580			     FIF_PROBE_REQ));
 581
 582	*total_flags &= FIF_OTHER_BSS |
 583			FIF_FCSFAIL |
 584			FIF_BCN_PRBRESP_PROMISC |
 585			FIF_PROBE_REQ;
 586
 587	down(&priv->scan.lock);
 588	mutex_lock(&priv->conf_mutex);
 589
 590	priv->rx_filter.promiscuous = 0;
 591	priv->rx_filter.bssid = (*total_flags & (FIF_OTHER_BSS |
 592			FIF_PROBE_REQ)) ? 1 : 0;
 593	priv->rx_filter.fcs = (*total_flags & FIF_FCSFAIL) ? 1 : 0;
 594	priv->disable_beacon_filter = !(*total_flags &
 595					(FIF_BCN_PRBRESP_PROMISC |
 596					 FIF_PROBE_REQ));
 597	if (priv->listening != listening) {
 598		priv->listening = listening;
 599		wsm_lock_tx(priv);
 600		cw1200_update_listening(priv, listening);
 601		wsm_unlock_tx(priv);
 602	}
 603	cw1200_update_filtering(priv);
 604	mutex_unlock(&priv->conf_mutex);
 605	up(&priv->scan.lock);
 606}
 607
 608int cw1200_conf_tx(struct ieee80211_hw *dev, struct ieee80211_vif *vif,
 609		   unsigned int link_id, u16 queue,
 610		   const struct ieee80211_tx_queue_params *params)
 611{
 612	struct cw1200_common *priv = dev->priv;
 613	int ret = 0;
 614	/* To prevent re-applying PM request OID again and again*/
 615	bool old_uapsd_flags;
 616
 617	mutex_lock(&priv->conf_mutex);
 618
 619	if (queue < dev->queues) {
 620		old_uapsd_flags = le16_to_cpu(priv->uapsd_info.uapsd_flags);
 621
 622		WSM_TX_QUEUE_SET(&priv->tx_queue_params, queue, 0, 0, 0);
 623		ret = wsm_set_tx_queue_params(priv,
 624					      &priv->tx_queue_params.params[queue], queue);
 625		if (ret) {
 626			ret = -EINVAL;
 627			goto out;
 628		}
 629
 630		WSM_EDCA_SET(&priv->edca, queue, params->aifs,
 631			     params->cw_min, params->cw_max,
 632			     params->txop, 0xc8,
 633			     params->uapsd);
 634		ret = wsm_set_edca_params(priv, &priv->edca);
 635		if (ret) {
 636			ret = -EINVAL;
 637			goto out;
 638		}
 639
 640		if (priv->mode == NL80211_IFTYPE_STATION) {
 641			ret = cw1200_set_uapsd_param(priv, &priv->edca);
 642			if (!ret && priv->setbssparams_done &&
 643			    (priv->join_status == CW1200_JOIN_STATUS_STA) &&
 644			    (old_uapsd_flags != le16_to_cpu(priv->uapsd_info.uapsd_flags)))
 645				ret = cw1200_set_pm(priv, &priv->powersave_mode);
 646		}
 647	} else {
 648		ret = -EINVAL;
 649	}
 650
 651out:
 652	mutex_unlock(&priv->conf_mutex);
 653	return ret;
 654}
 655
 656int cw1200_get_stats(struct ieee80211_hw *dev,
 657		     struct ieee80211_low_level_stats *stats)
 658{
 659	struct cw1200_common *priv = dev->priv;
 660
 661	memcpy(stats, &priv->stats, sizeof(*stats));
 662	return 0;
 663}
 664
 665int cw1200_set_pm(struct cw1200_common *priv, const struct wsm_set_pm *arg)
 666{
 667	struct wsm_set_pm pm = *arg;
 668
 669	if (priv->uapsd_info.uapsd_flags != 0)
 670		pm.mode &= ~WSM_PSM_FAST_PS_FLAG;
 671
 672	if (memcmp(&pm, &priv->firmware_ps_mode,
 673		   sizeof(struct wsm_set_pm))) {
 674		priv->firmware_ps_mode = pm;
 675		return wsm_set_pm(priv, &pm);
 676	} else {
 677		return 0;
 678	}
 679}
 680
 681int cw1200_set_key(struct ieee80211_hw *dev, enum set_key_cmd cmd,
 682		   struct ieee80211_vif *vif, struct ieee80211_sta *sta,
 683		   struct ieee80211_key_conf *key)
 684{
 685	int ret = -EOPNOTSUPP;
 686	struct cw1200_common *priv = dev->priv;
 687	struct ieee80211_key_seq seq;
 688
 689	mutex_lock(&priv->conf_mutex);
 690
 691	if (cmd == SET_KEY) {
 692		u8 *peer_addr = NULL;
 693		int pairwise = (key->flags & IEEE80211_KEY_FLAG_PAIRWISE) ?
 694			1 : 0;
 695		int idx = cw1200_alloc_key(priv);
 696		struct wsm_add_key *wsm_key = &priv->keys[idx];
 697
 698		if (idx < 0) {
 699			ret = -EINVAL;
 700			goto finally;
 701		}
 702
 703		if (sta)
 704			peer_addr = sta->addr;
 705
 706		key->flags |= IEEE80211_KEY_FLAG_PUT_IV_SPACE |
 707			      IEEE80211_KEY_FLAG_RESERVE_TAILROOM;
 708
 709		switch (key->cipher) {
 710		case WLAN_CIPHER_SUITE_WEP40:
 711		case WLAN_CIPHER_SUITE_WEP104:
 712			if (key->keylen > 16) {
 713				cw1200_free_key(priv, idx);
 714				ret = -EINVAL;
 715				goto finally;
 716			}
 717
 718			if (pairwise) {
 719				wsm_key->type = WSM_KEY_TYPE_WEP_PAIRWISE;
 720				memcpy(wsm_key->wep_pairwise.peer,
 721				       peer_addr, ETH_ALEN);
 722				memcpy(wsm_key->wep_pairwise.keydata,
 723				       &key->key[0], key->keylen);
 724				wsm_key->wep_pairwise.keylen = key->keylen;
 725			} else {
 726				wsm_key->type = WSM_KEY_TYPE_WEP_DEFAULT;
 727				memcpy(wsm_key->wep_group.keydata,
 728				       &key->key[0], key->keylen);
 729				wsm_key->wep_group.keylen = key->keylen;
 730				wsm_key->wep_group.keyid = key->keyidx;
 731			}
 732			break;
 733		case WLAN_CIPHER_SUITE_TKIP:
 734			ieee80211_get_key_rx_seq(key, 0, &seq);
 735			if (pairwise) {
 736				wsm_key->type = WSM_KEY_TYPE_TKIP_PAIRWISE;
 737				memcpy(wsm_key->tkip_pairwise.peer,
 738				       peer_addr, ETH_ALEN);
 739				memcpy(wsm_key->tkip_pairwise.keydata,
 740				       &key->key[0], 16);
 741				memcpy(wsm_key->tkip_pairwise.tx_mic_key,
 742				       &key->key[16], 8);
 743				memcpy(wsm_key->tkip_pairwise.rx_mic_key,
 744				       &key->key[24], 8);
 745			} else {
 746				size_t mic_offset =
 747					(priv->mode == NL80211_IFTYPE_AP) ?
 748					16 : 24;
 749				wsm_key->type = WSM_KEY_TYPE_TKIP_GROUP;
 750				memcpy(wsm_key->tkip_group.keydata,
 751				       &key->key[0], 16);
 752				memcpy(wsm_key->tkip_group.rx_mic_key,
 753				       &key->key[mic_offset], 8);
 754
 755				wsm_key->tkip_group.rx_seqnum[0] = seq.tkip.iv16 & 0xff;
 756				wsm_key->tkip_group.rx_seqnum[1] = (seq.tkip.iv16 >> 8) & 0xff;
 757				wsm_key->tkip_group.rx_seqnum[2] = seq.tkip.iv32 & 0xff;
 758				wsm_key->tkip_group.rx_seqnum[3] = (seq.tkip.iv32 >> 8) & 0xff;
 759				wsm_key->tkip_group.rx_seqnum[4] = (seq.tkip.iv32 >> 16) & 0xff;
 760				wsm_key->tkip_group.rx_seqnum[5] = (seq.tkip.iv32 >> 24) & 0xff;
 761				wsm_key->tkip_group.rx_seqnum[6] = 0;
 762				wsm_key->tkip_group.rx_seqnum[7] = 0;
 763
 764				wsm_key->tkip_group.keyid = key->keyidx;
 765			}
 766			break;
 767		case WLAN_CIPHER_SUITE_CCMP:
 768			ieee80211_get_key_rx_seq(key, 0, &seq);
 769			if (pairwise) {
 770				wsm_key->type = WSM_KEY_TYPE_AES_PAIRWISE;
 771				memcpy(wsm_key->aes_pairwise.peer,
 772				       peer_addr, ETH_ALEN);
 773				memcpy(wsm_key->aes_pairwise.keydata,
 774				       &key->key[0], 16);
 775			} else {
 776				wsm_key->type = WSM_KEY_TYPE_AES_GROUP;
 777				memcpy(wsm_key->aes_group.keydata,
 778				       &key->key[0], 16);
 779
 780				wsm_key->aes_group.rx_seqnum[0] = seq.ccmp.pn[5];
 781				wsm_key->aes_group.rx_seqnum[1] = seq.ccmp.pn[4];
 782				wsm_key->aes_group.rx_seqnum[2] = seq.ccmp.pn[3];
 783				wsm_key->aes_group.rx_seqnum[3] = seq.ccmp.pn[2];
 784				wsm_key->aes_group.rx_seqnum[4] = seq.ccmp.pn[1];
 785				wsm_key->aes_group.rx_seqnum[5] = seq.ccmp.pn[0];
 786				wsm_key->aes_group.rx_seqnum[6] = 0;
 787				wsm_key->aes_group.rx_seqnum[7] = 0;
 788				wsm_key->aes_group.keyid = key->keyidx;
 789			}
 790			break;
 791		case WLAN_CIPHER_SUITE_SMS4:
 792			if (pairwise) {
 793				wsm_key->type = WSM_KEY_TYPE_WAPI_PAIRWISE;
 794				memcpy(wsm_key->wapi_pairwise.peer,
 795				       peer_addr, ETH_ALEN);
 796				memcpy(wsm_key->wapi_pairwise.keydata,
 797				       &key->key[0], 16);
 798				memcpy(wsm_key->wapi_pairwise.mic_key,
 799				       &key->key[16], 16);
 800				wsm_key->wapi_pairwise.keyid = key->keyidx;
 801			} else {
 802				wsm_key->type = WSM_KEY_TYPE_WAPI_GROUP;
 803				memcpy(wsm_key->wapi_group.keydata,
 804				       &key->key[0],  16);
 805				memcpy(wsm_key->wapi_group.mic_key,
 806				       &key->key[16], 16);
 807				wsm_key->wapi_group.keyid = key->keyidx;
 808			}
 809			break;
 810		default:
 811			pr_warn("Unhandled key type %d\n", key->cipher);
 812			cw1200_free_key(priv, idx);
 813			ret = -EOPNOTSUPP;
 814			goto finally;
 815		}
 816		ret = wsm_add_key(priv, wsm_key);
 817		if (!ret)
 818			key->hw_key_idx = idx;
 819		else
 820			cw1200_free_key(priv, idx);
 821	} else if (cmd == DISABLE_KEY) {
 822		struct wsm_remove_key wsm_key = {
 823			.index = key->hw_key_idx,
 824		};
 825
 826		if (wsm_key.index > WSM_KEY_MAX_INDEX) {
 827			ret = -EINVAL;
 828			goto finally;
 829		}
 830
 831		cw1200_free_key(priv, wsm_key.index);
 832		ret = wsm_remove_key(priv, &wsm_key);
 833	} else {
 834		pr_warn("Unhandled key command %d\n", cmd);
 835	}
 836
 837finally:
 838	mutex_unlock(&priv->conf_mutex);
 839	return ret;
 840}
 841
 842void cw1200_wep_key_work(struct work_struct *work)
 843{
 844	struct cw1200_common *priv =
 845		container_of(work, struct cw1200_common, wep_key_work);
 846	u8 queue_id = cw1200_queue_get_queue_id(priv->pending_frame_id);
 847	struct cw1200_queue *queue = &priv->tx_queue[queue_id];
 848	__le32 wep_default_key_id = __cpu_to_le32(
 849		priv->wep_default_key_id);
 850
 851	pr_debug("[STA] Setting default WEP key: %d\n",
 852		 priv->wep_default_key_id);
 853	wsm_flush_tx(priv);
 854	wsm_write_mib(priv, WSM_MIB_ID_DOT11_WEP_DEFAULT_KEY_ID,
 855		      &wep_default_key_id, sizeof(wep_default_key_id));
 856	cw1200_queue_requeue(queue, priv->pending_frame_id);
 857	wsm_unlock_tx(priv);
 858}
 859
 860int cw1200_set_rts_threshold(struct ieee80211_hw *hw, int radio_idx,
 861			     u32 value)
 862{
 863	int ret = 0;
 864	__le32 val32;
 865	struct cw1200_common *priv = hw->priv;
 866
 867	if (priv->mode == NL80211_IFTYPE_UNSPECIFIED)
 868		return 0;
 869
 870	if (value != (u32) -1)
 871		val32 = __cpu_to_le32(value);
 872	else
 873		val32 = 0; /* disabled */
 874
 875	if (priv->rts_threshold == value)
 876		goto out;
 877
 878	pr_debug("[STA] Setting RTS threshold: %d\n",
 879		 priv->rts_threshold);
 880
 881	/* mutex_lock(&priv->conf_mutex); */
 882	ret = wsm_write_mib(priv, WSM_MIB_ID_DOT11_RTS_THRESHOLD,
 883			    &val32, sizeof(val32));
 884	if (!ret)
 885		priv->rts_threshold = value;
 886	/* mutex_unlock(&priv->conf_mutex); */
 887
 888out:
 889	return ret;
 890}
 891
 892/* If successful, LOCKS the TX queue! */
 893static int __cw1200_flush(struct cw1200_common *priv, bool drop)
 894{
 895	int i, ret;
 896
 897	for (;;) {
 898		/* TODO: correct flush handling is required when dev_stop.
 899		 * Temporary workaround: 2s
 900		 */
 901		if (drop) {
 902			for (i = 0; i < 4; ++i)
 903				cw1200_queue_clear(&priv->tx_queue[i]);
 904		} else {
 905			ret = wait_event_timeout(
 906				priv->tx_queue_stats.wait_link_id_empty,
 907				cw1200_queue_stats_is_empty(
 908					&priv->tx_queue_stats, -1),
 909				2 * HZ);
 910		}
 911
 912		if (!drop && ret <= 0) {
 913			ret = -ETIMEDOUT;
 914			break;
 915		} else {
 916			ret = 0;
 917		}
 918
 919		wsm_lock_tx(priv);
 920		if (!cw1200_queue_stats_is_empty(&priv->tx_queue_stats, -1)) {
 921			/* Highly unlikely: WSM requeued frames. */
 922			wsm_unlock_tx(priv);
 923			continue;
 924		}
 925		break;
 926	}
 927	return ret;
 928}
 929
 930void cw1200_flush(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
 931		  u32 queues, bool drop)
 932{
 933	struct cw1200_common *priv = hw->priv;
 934
 935	switch (priv->mode) {
 936	case NL80211_IFTYPE_MONITOR:
 937		drop = true;
 938		break;
 939	case NL80211_IFTYPE_AP:
 940		if (!priv->enable_beacon)
 941			drop = true;
 942		break;
 943	}
 944
 945	if (!__cw1200_flush(priv, drop))
 946		wsm_unlock_tx(priv);
 947
 948	return;
 949}
 950
 951/* ******************************************************************** */
 952/* WSM callbacks							*/
 953
 954void cw1200_free_event_queue(struct cw1200_common *priv)
 955{
 956	LIST_HEAD(list);
 957
 958	spin_lock(&priv->event_queue_lock);
 959	list_splice_init(&priv->event_queue, &list);
 960	spin_unlock(&priv->event_queue_lock);
 961
 962	__cw1200_free_event_queue(&list);
 963}
 964
 965void cw1200_event_handler(struct work_struct *work)
 966{
 967	struct cw1200_common *priv =
 968		container_of(work, struct cw1200_common, event_handler);
 969	struct cw1200_wsm_event *event;
 970	LIST_HEAD(list);
 971
 972	spin_lock(&priv->event_queue_lock);
 973	list_splice_init(&priv->event_queue, &list);
 974	spin_unlock(&priv->event_queue_lock);
 975
 976	list_for_each_entry(event, &list, link) {
 977		switch (event->evt.id) {
 978		case WSM_EVENT_ERROR:
 979			pr_err("Unhandled WSM Error from LMAC\n");
 980			break;
 981		case WSM_EVENT_BSS_LOST:
 982			pr_debug("[CQM] BSS lost.\n");
 983			cancel_work_sync(&priv->unjoin_work);
 984			if (!down_trylock(&priv->scan.lock)) {
 985				cw1200_cqm_bssloss_sm(priv, 1, 0, 0);
 986				up(&priv->scan.lock);
 987			} else {
 988				/* Scan is in progress. Delay reporting.
 989				 * Scan complete will trigger bss_loss_work
 990				 */
 991				priv->delayed_link_loss = 1;
 992				/* Also start a watchdog. */
 993				queue_delayed_work(priv->workqueue,
 994						   &priv->bss_loss_work, 5*HZ);
 995			}
 996			break;
 997		case WSM_EVENT_BSS_REGAINED:
 998			pr_debug("[CQM] BSS regained.\n");
 999			cw1200_cqm_bssloss_sm(priv, 0, 0, 0);
1000			cancel_work_sync(&priv->unjoin_work);
1001			break;
1002		case WSM_EVENT_RADAR_DETECTED:
1003			wiphy_info(priv->hw->wiphy, "radar pulse detected\n");
1004			break;
1005		case WSM_EVENT_RCPI_RSSI:
1006		{
1007			/* RSSI: signed Q8.0, RCPI: unsigned Q7.1
1008			 * RSSI = RCPI / 2 - 110
1009			 */
1010			int rcpi_rssi = (int)(event->evt.data & 0xFF);
1011			int cqm_evt;
1012			if (priv->cqm_use_rssi)
1013				rcpi_rssi = (s8)rcpi_rssi;
1014			else
1015				rcpi_rssi =  rcpi_rssi / 2 - 110;
1016
1017			cqm_evt = (rcpi_rssi <= priv->cqm_rssi_thold) ?
1018				NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW :
1019				NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH;
1020			pr_debug("[CQM] RSSI event: %d.\n", rcpi_rssi);
1021			ieee80211_cqm_rssi_notify(priv->vif, cqm_evt, rcpi_rssi,
1022						  GFP_KERNEL);
1023			break;
1024		}
1025		case WSM_EVENT_BT_INACTIVE:
1026			pr_warn("Unhandled BT INACTIVE from LMAC\n");
1027			break;
1028		case WSM_EVENT_BT_ACTIVE:
1029			pr_warn("Unhandled BT ACTIVE from LMAC\n");
1030			break;
1031		}
1032	}
1033	__cw1200_free_event_queue(&list);
1034}
1035
1036void cw1200_bss_loss_work(struct work_struct *work)
1037{
1038	struct cw1200_common *priv =
1039		container_of(work, struct cw1200_common, bss_loss_work.work);
1040
1041	pr_debug("[CQM] Reporting connection loss.\n");
1042	wsm_lock_tx(priv);
1043	if (queue_work(priv->workqueue, &priv->unjoin_work) <= 0)
1044		wsm_unlock_tx(priv);
1045}
1046
1047void cw1200_bss_params_work(struct work_struct *work)
1048{
1049	struct cw1200_common *priv =
1050		container_of(work, struct cw1200_common, bss_params_work);
1051	mutex_lock(&priv->conf_mutex);
1052
1053	priv->bss_params.reset_beacon_loss = 1;
1054	wsm_set_bss_params(priv, &priv->bss_params);
1055	priv->bss_params.reset_beacon_loss = 0;
1056
1057	mutex_unlock(&priv->conf_mutex);
1058}
1059
1060/* ******************************************************************** */
1061/* Internal API								*/
1062
1063/* This function is called to Parse the SDD file
1064 * to extract listen_interval and PTA related information
1065 * sdd is a TLV: u8 id, u8 len, u8 data[]
1066 */
1067static int cw1200_parse_sdd_file(struct cw1200_common *priv)
1068{
1069	const u8 *p = priv->sdd->data;
1070	int ret = 0;
1071
1072	while (p + 2 <= priv->sdd->data + priv->sdd->size) {
1073		if (p + p[1] + 2 > priv->sdd->data + priv->sdd->size) {
1074			pr_warn("Malformed sdd structure\n");
1075			return -1;
1076		}
1077		switch (p[0]) {
1078		case SDD_PTA_CFG_ELT_ID: {
1079			u16 v;
1080			if (p[1] < 4) {
1081				pr_warn("SDD_PTA_CFG_ELT_ID malformed\n");
1082				ret = -1;
1083				break;
1084			}
1085			v = le16_to_cpu(*((__le16 *)(p + 2)));
1086			if (!v)  /* non-zero means this is enabled */
1087				break;
1088
1089			v = le16_to_cpu(*((__le16 *)(p + 4)));
1090			priv->conf_listen_interval = (v >> 7) & 0x1F;
1091			pr_debug("PTA found; Listen Interval %d\n",
1092				 priv->conf_listen_interval);
1093			break;
1094		}
1095		case SDD_REFERENCE_FREQUENCY_ELT_ID: {
1096			u16 clk = le16_to_cpu(*((__le16 *)(p + 2)));
1097			if (clk != priv->hw_refclk)
1098				pr_warn("SDD file doesn't match configured refclk (%d vs %d)\n",
1099					clk, priv->hw_refclk);
1100			break;
1101		}
1102		default:
1103			break;
1104		}
1105		p += p[1] + 2;
1106	}
1107
1108	if (!priv->bt_present) {
1109		pr_debug("PTA element NOT found.\n");
1110		priv->conf_listen_interval = 0;
1111	}
1112	return ret;
1113}
1114
1115int cw1200_setup_mac(struct cw1200_common *priv)
1116{
1117	int ret = 0;
1118
1119	/* NOTE: There is a bug in FW: it reports signal
1120	 * as RSSI if RSSI subscription is enabled.
1121	 * It's not enough to set WSM_RCPI_RSSI_USE_RSSI.
1122	 *
1123	 * NOTE2: RSSI based reports have been switched to RCPI, since
1124	 * FW has a bug and RSSI reported values are not stable,
1125	 * what can lead to signal level oscilations in user-end applications
1126	 */
1127	struct wsm_rcpi_rssi_threshold threshold = {
1128		.rssiRcpiMode = WSM_RCPI_RSSI_THRESHOLD_ENABLE |
1129		WSM_RCPI_RSSI_DONT_USE_UPPER |
1130		WSM_RCPI_RSSI_DONT_USE_LOWER,
1131		.rollingAverageCount = 16,
1132	};
1133
1134	struct wsm_configuration cfg = {
1135		.dot11StationId = &priv->mac_addr[0],
1136	};
1137
1138	/* Remember the decission here to make sure, we will handle
1139	 * the RCPI/RSSI value correctly on WSM_EVENT_RCPI_RSS
1140	 */
1141	if (threshold.rssiRcpiMode & WSM_RCPI_RSSI_USE_RSSI)
1142		priv->cqm_use_rssi = true;
1143
1144	if (!priv->sdd) {
1145		ret = request_firmware(&priv->sdd, priv->sdd_path, priv->pdev);
1146		if (ret) {
1147			pr_err("Can't load sdd file %s.\n", priv->sdd_path);
1148			return ret;
1149		}
1150		cw1200_parse_sdd_file(priv);
1151	}
1152
1153	cfg.dpdData = priv->sdd->data;
1154	cfg.dpdData_size = priv->sdd->size;
1155	ret = wsm_configuration(priv, &cfg);
1156	if (ret)
1157		return ret;
1158
1159	/* Configure RSSI/SCPI reporting as RSSI. */
1160	wsm_set_rcpi_rssi_threshold(priv, &threshold);
1161
1162	return 0;
1163}
1164
1165static void cw1200_join_complete(struct cw1200_common *priv)
1166{
1167	pr_debug("[STA] Join complete (%d)\n", priv->join_complete_status);
1168
1169	priv->join_pending = false;
1170	if (priv->join_complete_status) {
1171		priv->join_status = CW1200_JOIN_STATUS_PASSIVE;
1172		cw1200_update_listening(priv, priv->listening);
1173		cw1200_do_unjoin(priv);
1174		ieee80211_connection_loss(priv->vif);
1175	} else {
1176		if (priv->mode == NL80211_IFTYPE_ADHOC)
1177			priv->join_status = CW1200_JOIN_STATUS_IBSS;
1178		else
1179			priv->join_status = CW1200_JOIN_STATUS_PRE_STA;
1180	}
1181	wsm_unlock_tx(priv); /* Clearing the lock held before do_join() */
1182}
1183
1184void cw1200_join_complete_work(struct work_struct *work)
1185{
1186	struct cw1200_common *priv =
1187		container_of(work, struct cw1200_common, join_complete_work);
1188	mutex_lock(&priv->conf_mutex);
1189	cw1200_join_complete(priv);
1190	mutex_unlock(&priv->conf_mutex);
1191}
1192
1193void cw1200_join_complete_cb(struct cw1200_common *priv,
1194			     struct wsm_join_complete *arg)
1195{
1196	pr_debug("[STA] cw1200_join_complete_cb called, status=%d.\n",
1197		 arg->status);
1198
1199	if (cancel_delayed_work(&priv->join_timeout)) {
1200		priv->join_complete_status = arg->status;
1201		queue_work(priv->workqueue, &priv->join_complete_work);
1202	}
1203}
1204
1205/* MUST be called with tx_lock held!  It will be unlocked for us. */
1206static void cw1200_do_join(struct cw1200_common *priv)
1207{
1208	const u8 *bssid;
1209	struct ieee80211_bss_conf *conf = &priv->vif->bss_conf;
1210	struct cfg80211_bss *bss = NULL;
1211	struct wsm_protected_mgmt_policy mgmt_policy;
1212	struct wsm_join join = {
1213		.mode = priv->vif->cfg.ibss_joined ?
1214		WSM_JOIN_MODE_IBSS : WSM_JOIN_MODE_BSS,
1215		.preamble_type = WSM_JOIN_PREAMBLE_LONG,
1216		.probe_for_join = 1,
1217		.atim_window = 0,
1218		.basic_rate_set = cw1200_rate_mask_to_wsm(priv,
1219							  conf->basic_rates),
1220	};
1221	if (delayed_work_pending(&priv->join_timeout)) {
1222		pr_warn("[STA] - Join request already pending, skipping..\n");
1223		wsm_unlock_tx(priv);
1224		return;
1225	}
1226
1227	if (priv->join_status)
1228		cw1200_do_unjoin(priv);
1229
1230	bssid = priv->vif->bss_conf.bssid;
1231
1232	bss = cfg80211_get_bss(priv->hw->wiphy, priv->channel, bssid, NULL, 0,
1233			       IEEE80211_BSS_TYPE_ANY, IEEE80211_PRIVACY_ANY);
1234
1235	if (!bss && !priv->vif->cfg.ibss_joined) {
1236		wsm_unlock_tx(priv);
1237		return;
1238	}
1239
1240	mutex_lock(&priv->conf_mutex);
1241
1242	/* Under the conf lock: check scan status and
1243	 * bail out if it is in progress.
1244	 */
1245	if (atomic_read(&priv->scan.in_progress)) {
1246		wsm_unlock_tx(priv);
1247		goto done_put;
1248	}
1249
1250	priv->join_pending = true;
1251
1252	/* Sanity check basic rates */
1253	if (!join.basic_rate_set)
1254		join.basic_rate_set = 7;
1255
1256	/* Sanity check beacon interval */
1257	if (!priv->beacon_int)
1258		priv->beacon_int = 1;
1259
1260	join.beacon_interval = priv->beacon_int;
1261
1262	/* BT Coex related changes */
1263	if (priv->bt_present) {
1264		if (((priv->conf_listen_interval * 100) %
1265		     priv->beacon_int) == 0)
1266			priv->listen_interval =
1267				((priv->conf_listen_interval * 100) /
1268				 priv->beacon_int);
1269		else
1270			priv->listen_interval =
1271				((priv->conf_listen_interval * 100) /
1272				 priv->beacon_int + 1);
1273	}
1274
1275	if (priv->hw->conf.ps_dtim_period)
1276		priv->join_dtim_period = priv->hw->conf.ps_dtim_period;
1277	join.dtim_period = priv->join_dtim_period;
1278
1279	join.channel_number = priv->channel->hw_value;
1280	join.band = (priv->channel->band == NL80211_BAND_5GHZ) ?
1281		WSM_PHY_BAND_5G : WSM_PHY_BAND_2_4G;
1282
1283	memcpy(join.bssid, bssid, sizeof(join.bssid));
1284
1285	pr_debug("[STA] Join BSSID: %pM DTIM: %d, interval: %d\n",
1286		 join.bssid,
1287		 join.dtim_period, priv->beacon_int);
1288
1289	if (!priv->vif->cfg.ibss_joined) {
1290		const u8 *ssidie;
1291		rcu_read_lock();
1292		ssidie = ieee80211_bss_get_ie(bss, WLAN_EID_SSID);
1293		if (ssidie) {
1294			join.ssid_len = min(ssidie[1], IEEE80211_MAX_SSID_LEN);
1295			memcpy(join.ssid, &ssidie[2], join.ssid_len);
1296		}
1297		rcu_read_unlock();
1298	}
1299
1300	if (priv->vif->p2p) {
1301		join.flags |= WSM_JOIN_FLAGS_P2P_GO;
1302		join.basic_rate_set =
1303			cw1200_rate_mask_to_wsm(priv, 0xFF0);
1304	}
1305
1306	/* Enable asynchronous join calls */
1307	if (!priv->vif->cfg.ibss_joined) {
1308		join.flags |= WSM_JOIN_FLAGS_FORCE;
1309		join.flags |= WSM_JOIN_FLAGS_FORCE_WITH_COMPLETE_IND;
1310	}
1311
1312	wsm_flush_tx(priv);
1313
1314	/* Stay Awake for Join and Auth Timeouts and a bit more */
1315	cw1200_pm_stay_awake(&priv->pm_state,
1316			     CW1200_JOIN_TIMEOUT + CW1200_AUTH_TIMEOUT);
1317
1318	cw1200_update_listening(priv, false);
1319
1320	/* Turn on Block ACKs */
1321	wsm_set_block_ack_policy(priv, priv->ba_tx_tid_mask,
1322				 priv->ba_rx_tid_mask);
1323
1324	/* Set up timeout */
1325	if (join.flags & WSM_JOIN_FLAGS_FORCE_WITH_COMPLETE_IND) {
1326		priv->join_status = CW1200_JOIN_STATUS_JOINING;
1327		queue_delayed_work(priv->workqueue,
1328				   &priv->join_timeout,
1329				   CW1200_JOIN_TIMEOUT);
1330	}
1331
1332	/* 802.11w protected mgmt frames */
1333	mgmt_policy.protectedMgmtEnable = 0;
1334	mgmt_policy.unprotectedMgmtFramesAllowed = 1;
1335	mgmt_policy.encryptionForAuthFrame = 1;
1336	wsm_set_protected_mgmt_policy(priv, &mgmt_policy);
1337
1338	/* Perform actual join */
1339	if (wsm_join(priv, &join)) {
1340		pr_err("[STA] cw1200_join_work: wsm_join failed!\n");
1341		cancel_delayed_work_sync(&priv->join_timeout);
1342		cw1200_update_listening(priv, priv->listening);
1343		/* Tx lock still held, unjoin will clear it. */
1344		if (queue_work(priv->workqueue, &priv->unjoin_work) <= 0)
1345			wsm_unlock_tx(priv);
1346	} else {
1347		if (!(join.flags & WSM_JOIN_FLAGS_FORCE_WITH_COMPLETE_IND))
1348			cw1200_join_complete(priv); /* Will clear tx_lock */
1349
1350		/* Upload keys */
1351		cw1200_upload_keys(priv);
1352
1353		/* Due to beacon filtering it is possible that the
1354		 * AP's beacon is not known for the mac80211 stack.
1355		 * Disable filtering temporary to make sure the stack
1356		 * receives at least one
1357		 */
1358		priv->disable_beacon_filter = true;
1359	}
1360	cw1200_update_filtering(priv);
1361
1362done_put:
1363	mutex_unlock(&priv->conf_mutex);
1364	if (bss)
1365		cfg80211_put_bss(priv->hw->wiphy, bss);
1366}
1367
1368void cw1200_join_timeout(struct work_struct *work)
1369{
1370	struct cw1200_common *priv =
1371		container_of(work, struct cw1200_common, join_timeout.work);
1372	pr_debug("[WSM] Join timed out.\n");
1373	wsm_lock_tx(priv);
1374	if (queue_work(priv->workqueue, &priv->unjoin_work) <= 0)
1375		wsm_unlock_tx(priv);
1376}
1377
1378static void cw1200_do_unjoin(struct cw1200_common *priv)
1379{
1380	struct wsm_reset reset = {
1381		.reset_statistics = true,
1382	};
1383
1384	cancel_delayed_work_sync(&priv->join_timeout);
1385
1386	mutex_lock(&priv->conf_mutex);
1387	priv->join_pending = false;
1388
1389	if (atomic_read(&priv->scan.in_progress)) {
1390		if (priv->delayed_unjoin)
1391			wiphy_dbg(priv->hw->wiphy, "Delayed unjoin is already scheduled.\n");
1392		else
1393			priv->delayed_unjoin = true;
1394		goto done;
1395	}
1396
1397	priv->delayed_link_loss = false;
1398
1399	if (!priv->join_status)
1400		goto done;
1401
1402	if (priv->join_status == CW1200_JOIN_STATUS_AP)
1403		goto done;
1404
1405	cancel_work_sync(&priv->update_filtering_work);
1406	cancel_work_sync(&priv->set_beacon_wakeup_period_work);
1407	priv->join_status = CW1200_JOIN_STATUS_PASSIVE;
1408
1409	/* Unjoin is a reset. */
1410	wsm_flush_tx(priv);
1411	wsm_keep_alive_period(priv, 0);
1412	wsm_reset(priv, &reset);
1413	wsm_set_output_power(priv, priv->output_power * 10);
1414	priv->join_dtim_period = 0;
1415	cw1200_setup_mac(priv);
1416	cw1200_free_event_queue(priv);
1417	cancel_work_sync(&priv->event_handler);
1418	cw1200_update_listening(priv, priv->listening);
1419	cw1200_cqm_bssloss_sm(priv, 0, 0, 0);
1420
1421	/* Disable Block ACKs */
1422	wsm_set_block_ack_policy(priv, 0, 0);
1423
1424	priv->disable_beacon_filter = false;
1425	cw1200_update_filtering(priv);
1426	memset(&priv->association_mode, 0,
1427	       sizeof(priv->association_mode));
1428	memset(&priv->bss_params, 0, sizeof(priv->bss_params));
1429	priv->setbssparams_done = false;
1430	memset(&priv->firmware_ps_mode, 0,
1431	       sizeof(priv->firmware_ps_mode));
1432
1433	pr_debug("[STA] Unjoin completed.\n");
1434
1435done:
1436	mutex_unlock(&priv->conf_mutex);
1437}
1438
1439void cw1200_unjoin_work(struct work_struct *work)
1440{
1441	struct cw1200_common *priv =
1442		container_of(work, struct cw1200_common, unjoin_work);
1443
1444	cw1200_do_unjoin(priv);
1445
1446	/* Tell the stack we're dead */
1447	ieee80211_connection_loss(priv->vif);
1448
1449	wsm_unlock_tx(priv);
1450}
1451
1452int cw1200_enable_listening(struct cw1200_common *priv)
1453{
1454	struct wsm_start start = {
1455		.mode = WSM_START_MODE_P2P_DEV,
1456		.band = WSM_PHY_BAND_2_4G,
1457		.beacon_interval = 100,
1458		.dtim_period = 1,
1459		.probe_delay = 0,
1460		.basic_rate_set = 0x0F,
1461	};
1462
1463	if (priv->channel) {
1464		start.band = priv->channel->band == NL80211_BAND_5GHZ ?
1465			     WSM_PHY_BAND_5G : WSM_PHY_BAND_2_4G;
1466		start.channel_number = priv->channel->hw_value;
1467	} else {
1468		start.band = WSM_PHY_BAND_2_4G;
1469		start.channel_number = 1;
1470	}
1471
1472	return wsm_start(priv, &start);
1473}
1474
1475int cw1200_disable_listening(struct cw1200_common *priv)
1476{
1477	int ret;
1478	struct wsm_reset reset = {
1479		.reset_statistics = true,
1480	};
1481	ret = wsm_reset(priv, &reset);
1482	return ret;
1483}
1484
1485void cw1200_update_listening(struct cw1200_common *priv, bool enabled)
1486{
1487	if (enabled) {
1488		if (priv->join_status == CW1200_JOIN_STATUS_PASSIVE) {
1489			if (!cw1200_enable_listening(priv))
1490				priv->join_status = CW1200_JOIN_STATUS_MONITOR;
1491			wsm_set_probe_responder(priv, true);
1492		}
1493	} else {
1494		if (priv->join_status == CW1200_JOIN_STATUS_MONITOR) {
1495			if (!cw1200_disable_listening(priv))
1496				priv->join_status = CW1200_JOIN_STATUS_PASSIVE;
1497			wsm_set_probe_responder(priv, false);
1498		}
1499	}
1500}
1501
1502int cw1200_set_uapsd_param(struct cw1200_common *priv,
1503			   const struct wsm_edca_params *arg)
1504{
1505	int ret;
1506	u16 uapsd_flags = 0;
1507
1508	/* Here's the mapping AC [queue, bit]
1509	 *  VO [0,3], VI [1, 2], BE [2, 1], BK [3, 0]
1510	 */
1511
1512	if (arg->uapsd_enable[0])
1513		uapsd_flags |= 1 << 3;
1514
1515	if (arg->uapsd_enable[1])
1516		uapsd_flags |= 1 << 2;
1517
1518	if (arg->uapsd_enable[2])
1519		uapsd_flags |= 1 << 1;
1520
1521	if (arg->uapsd_enable[3])
1522		uapsd_flags |= 1;
1523
1524	/* Currently pseudo U-APSD operation is not supported, so setting
1525	 * MinAutoTriggerInterval, MaxAutoTriggerInterval and
1526	 * AutoTriggerStep to 0
1527	 */
1528
1529	priv->uapsd_info.uapsd_flags = cpu_to_le16(uapsd_flags);
1530	priv->uapsd_info.min_auto_trigger_interval = 0;
1531	priv->uapsd_info.max_auto_trigger_interval = 0;
1532	priv->uapsd_info.auto_trigger_step = 0;
1533
1534	ret = wsm_set_uapsd_info(priv, &priv->uapsd_info);
1535	return ret;
1536}
1537
1538/* ******************************************************************** */
1539/* AP API								*/
1540
1541int cw1200_sta_add(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
1542		   struct ieee80211_sta *sta)
1543{
1544	struct cw1200_common *priv = hw->priv;
1545	struct cw1200_sta_priv *sta_priv =
1546			(struct cw1200_sta_priv *)&sta->drv_priv;
1547	struct cw1200_link_entry *entry;
1548	struct sk_buff *skb;
1549
1550	if (priv->mode != NL80211_IFTYPE_AP)
1551		return 0;
1552
1553	sta_priv->link_id = cw1200_find_link_id(priv, sta->addr);
1554	if (WARN_ON(!sta_priv->link_id)) {
1555		wiphy_info(priv->hw->wiphy,
1556			   "[AP] No more link IDs available.\n");
1557		return -ENOENT;
1558	}
1559
1560	entry = &priv->link_id_db[sta_priv->link_id - 1];
1561	spin_lock_bh(&priv->ps_state_lock);
1562	if ((sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK) ==
1563					IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK)
1564		priv->sta_asleep_mask |= BIT(sta_priv->link_id);
1565	entry->status = CW1200_LINK_HARD;
1566	while ((skb = skb_dequeue(&entry->rx_queue)))
1567		ieee80211_rx_irqsafe(priv->hw, skb);
1568	spin_unlock_bh(&priv->ps_state_lock);
1569	return 0;
1570}
1571
1572int cw1200_sta_remove(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
1573		      struct ieee80211_sta *sta)
1574{
1575	struct cw1200_common *priv = hw->priv;
1576	struct cw1200_sta_priv *sta_priv =
1577			(struct cw1200_sta_priv *)&sta->drv_priv;
1578	struct cw1200_link_entry *entry;
1579
1580	if (priv->mode != NL80211_IFTYPE_AP || !sta_priv->link_id)
1581		return 0;
1582
1583	entry = &priv->link_id_db[sta_priv->link_id - 1];
1584	spin_lock_bh(&priv->ps_state_lock);
1585	entry->status = CW1200_LINK_RESERVE;
1586	entry->timestamp = jiffies;
1587	wsm_lock_tx_async(priv);
1588	if (queue_work(priv->workqueue, &priv->link_id_work) <= 0)
1589		wsm_unlock_tx(priv);
1590	spin_unlock_bh(&priv->ps_state_lock);
1591	flush_workqueue(priv->workqueue);
1592	return 0;
1593}
1594
1595static void __cw1200_sta_notify(struct ieee80211_hw *dev,
1596				struct ieee80211_vif *vif,
1597				enum sta_notify_cmd notify_cmd,
1598				int link_id)
1599{
1600	struct cw1200_common *priv = dev->priv;
1601	u32 bit, prev;
1602
1603	/* Zero link id means "for all link IDs" */
1604	if (link_id)
1605		bit = BIT(link_id);
1606	else if (WARN_ON_ONCE(notify_cmd != STA_NOTIFY_AWAKE))
1607		bit = 0;
1608	else
1609		bit = priv->link_id_map;
1610	prev = priv->sta_asleep_mask & bit;
1611
1612	switch (notify_cmd) {
1613	case STA_NOTIFY_SLEEP:
1614		if (!prev) {
1615			if (priv->buffered_multicasts &&
1616			    !priv->sta_asleep_mask)
1617				queue_work(priv->workqueue,
1618					   &priv->multicast_start_work);
1619			priv->sta_asleep_mask |= bit;
1620		}
1621		break;
1622	case STA_NOTIFY_AWAKE:
1623		if (prev) {
1624			priv->sta_asleep_mask &= ~bit;
1625			priv->pspoll_mask &= ~bit;
1626			if (priv->tx_multicast && link_id &&
1627			    !priv->sta_asleep_mask)
1628				queue_work(priv->workqueue,
1629					   &priv->multicast_stop_work);
1630			cw1200_bh_wakeup(priv);
1631		}
1632		break;
1633	}
1634}
1635
1636void cw1200_sta_notify(struct ieee80211_hw *dev,
1637		       struct ieee80211_vif *vif,
1638		       enum sta_notify_cmd notify_cmd,
1639		       struct ieee80211_sta *sta)
1640{
1641	struct cw1200_common *priv = dev->priv;
1642	struct cw1200_sta_priv *sta_priv =
1643		(struct cw1200_sta_priv *)&sta->drv_priv;
1644
1645	spin_lock_bh(&priv->ps_state_lock);
1646	__cw1200_sta_notify(dev, vif, notify_cmd, sta_priv->link_id);
1647	spin_unlock_bh(&priv->ps_state_lock);
1648}
1649
1650static void cw1200_ps_notify(struct cw1200_common *priv,
1651		      int link_id, bool ps)
1652{
1653	if (link_id > CW1200_MAX_STA_IN_AP_MODE)
1654		return;
1655
1656	pr_debug("%s for LinkId: %d. STAs asleep: %.8X\n",
1657		 ps ? "Stop" : "Start",
1658		 link_id, priv->sta_asleep_mask);
1659
1660	__cw1200_sta_notify(priv->hw, priv->vif,
1661			    ps ? STA_NOTIFY_SLEEP : STA_NOTIFY_AWAKE, link_id);
1662}
1663
1664static int cw1200_set_tim_impl(struct cw1200_common *priv, bool aid0_bit_set)
1665{
1666	struct sk_buff *skb;
1667	struct wsm_update_ie update_ie = {
1668		.what = WSM_UPDATE_IE_BEACON,
1669		.count = 1,
1670	};
1671	u16 tim_offset, tim_length;
1672
1673	pr_debug("[AP] mcast: %s.\n", aid0_bit_set ? "ena" : "dis");
1674
1675	skb = ieee80211_beacon_get_tim(priv->hw, priv->vif,
1676				       &tim_offset, &tim_length, 0);
1677	if (!skb) {
1678		if (!__cw1200_flush(priv, true))
1679			wsm_unlock_tx(priv);
1680		return -ENOENT;
1681	}
1682
1683	if (tim_offset && tim_length >= 6) {
1684		/* Ignore DTIM count from mac80211:
1685		 * firmware handles DTIM internally.
1686		 */
1687		skb->data[tim_offset + 2] = 0;
1688
1689		/* Set/reset aid0 bit */
1690		if (aid0_bit_set)
1691			skb->data[tim_offset + 4] |= 1;
1692		else
1693			skb->data[tim_offset + 4] &= ~1;
1694	}
1695
1696	update_ie.ies = &skb->data[tim_offset];
1697	update_ie.length = tim_length;
1698	wsm_update_ie(priv, &update_ie);
1699
1700	dev_kfree_skb(skb);
1701
1702	return 0;
1703}
1704
1705void cw1200_set_tim_work(struct work_struct *work)
1706{
1707	struct cw1200_common *priv =
1708		container_of(work, struct cw1200_common, set_tim_work);
1709	(void)cw1200_set_tim_impl(priv, priv->aid0_bit_set);
1710}
1711
1712int cw1200_set_tim(struct ieee80211_hw *dev, struct ieee80211_sta *sta,
1713		   bool set)
1714{
1715	struct cw1200_common *priv = dev->priv;
1716	queue_work(priv->workqueue, &priv->set_tim_work);
1717	return 0;
1718}
1719
1720void cw1200_set_cts_work(struct work_struct *work)
1721{
1722	struct cw1200_common *priv =
1723		container_of(work, struct cw1200_common, set_cts_work);
1724
1725	u8 erp_ie[3] = {WLAN_EID_ERP_INFO, 0x1, 0};
1726	struct wsm_update_ie update_ie = {
1727		.what = WSM_UPDATE_IE_BEACON,
1728		.count = 1,
1729		.ies = erp_ie,
1730		.length = 3,
1731	};
1732	u32 erp_info;
1733	__le32 use_cts_prot;
1734	mutex_lock(&priv->conf_mutex);
1735	erp_info = priv->erp_info;
1736	mutex_unlock(&priv->conf_mutex);
1737	use_cts_prot =
1738		erp_info & WLAN_ERP_USE_PROTECTION ?
1739		__cpu_to_le32(1) : 0;
1740
1741	erp_ie[ERP_INFO_BYTE_OFFSET] = erp_info;
1742
1743	pr_debug("[STA] ERP information 0x%x\n", erp_info);
1744
1745	wsm_write_mib(priv, WSM_MIB_ID_NON_ERP_PROTECTION,
1746		      &use_cts_prot, sizeof(use_cts_prot));
1747	wsm_update_ie(priv, &update_ie);
1748
1749	return;
1750}
1751
1752static int cw1200_set_btcoexinfo(struct cw1200_common *priv)
1753{
1754	struct wsm_override_internal_txrate arg;
1755	int ret = 0;
1756
1757	if (priv->mode == NL80211_IFTYPE_STATION) {
1758		/* Plumb PSPOLL and NULL template */
1759		cw1200_upload_pspoll(priv);
1760		cw1200_upload_null(priv);
1761		cw1200_upload_qosnull(priv);
1762	} else {
1763		return 0;
1764	}
1765
1766	memset(&arg, 0, sizeof(struct wsm_override_internal_txrate));
1767
1768	if (!priv->vif->p2p) {
1769		/* STATION mode */
1770		if (priv->bss_params.operational_rate_set & ~0xF) {
1771			pr_debug("[STA] STA has ERP rates\n");
1772			/* G or BG mode */
1773			arg.internalTxRate = (__ffs(
1774			priv->bss_params.operational_rate_set & ~0xF));
1775		} else {
1776			pr_debug("[STA] STA has non ERP rates\n");
1777			/* B only mode */
1778			arg.internalTxRate = (__ffs(le32_to_cpu(priv->association_mode.basic_rate_set)));
1779		}
1780		arg.nonErpInternalTxRate = (__ffs(le32_to_cpu(priv->association_mode.basic_rate_set)));
1781	} else {
1782		/* P2P mode */
1783		arg.internalTxRate = (__ffs(priv->bss_params.operational_rate_set & ~0xF));
1784		arg.nonErpInternalTxRate = (__ffs(priv->bss_params.operational_rate_set & ~0xF));
1785	}
1786
1787	pr_debug("[STA] BTCOEX_INFO MODE %d, internalTxRate : %x, nonErpInternalTxRate: %x\n",
1788		 priv->mode,
1789		 arg.internalTxRate,
1790		 arg.nonErpInternalTxRate);
1791
1792	ret = wsm_write_mib(priv, WSM_MIB_ID_OVERRIDE_INTERNAL_TX_RATE,
1793			    &arg, sizeof(arg));
1794
1795	return ret;
1796}
1797
1798void cw1200_bss_info_changed(struct ieee80211_hw *dev,
1799			     struct ieee80211_vif *vif,
1800			     struct ieee80211_bss_conf *info,
1801			     u64 changed)
1802{
1803	struct cw1200_common *priv = dev->priv;
1804	bool do_join = false;
1805
1806	mutex_lock(&priv->conf_mutex);
1807
1808	pr_debug("BSS CHANGED:  %llx\n", changed);
1809
1810	/* TODO: BSS_CHANGED_QOS */
1811	/* TODO: BSS_CHANGED_TXPOWER */
1812
1813	if (changed & BSS_CHANGED_ARP_FILTER) {
1814		struct wsm_mib_arp_ipv4_filter filter = {0};
1815		int i;
1816
1817		pr_debug("[STA] BSS_CHANGED_ARP_FILTER cnt: %d\n",
1818			 vif->cfg.arp_addr_cnt);
1819
1820		/* Currently only one IP address is supported by firmware.
1821		 * In case of more IPs arp filtering will be disabled.
1822		 */
1823		if (vif->cfg.arp_addr_cnt > 0 &&
1824		    vif->cfg.arp_addr_cnt <= WSM_MAX_ARP_IP_ADDRTABLE_ENTRIES) {
1825			for (i = 0; i < vif->cfg.arp_addr_cnt; i++) {
1826				filter.ipv4addrs[i] = vif->cfg.arp_addr_list[i];
1827				pr_debug("[STA] addr[%d]: 0x%X\n",
1828					 i, filter.ipv4addrs[i]);
1829			}
1830			filter.enable = __cpu_to_le32(1);
1831		}
1832
1833		pr_debug("[STA] arp ip filter enable: %d\n",
1834			 __le32_to_cpu(filter.enable));
1835
1836		wsm_set_arp_ipv4_filter(priv, &filter);
1837	}
1838
1839	if (changed &
1840	    (BSS_CHANGED_BEACON |
1841	     BSS_CHANGED_AP_PROBE_RESP |
1842	     BSS_CHANGED_BSSID |
1843	     BSS_CHANGED_SSID |
1844	     BSS_CHANGED_IBSS)) {
1845		pr_debug("BSS_CHANGED_BEACON\n");
1846		priv->beacon_int = info->beacon_int;
1847		cw1200_update_beaconing(priv);
1848		cw1200_upload_beacon(priv);
1849	}
1850
1851	if (changed & BSS_CHANGED_BEACON_ENABLED) {
1852		pr_debug("BSS_CHANGED_BEACON_ENABLED (%d)\n", info->enable_beacon);
1853
1854		if (priv->enable_beacon != info->enable_beacon) {
1855			cw1200_enable_beaconing(priv, info->enable_beacon);
1856			priv->enable_beacon = info->enable_beacon;
1857		}
1858	}
1859
1860	if (changed & BSS_CHANGED_BEACON_INT) {
1861		pr_debug("CHANGED_BEACON_INT\n");
1862		if (vif->cfg.ibss_joined)
1863			do_join = true;
1864		else if (priv->join_status == CW1200_JOIN_STATUS_AP)
1865			cw1200_update_beaconing(priv);
1866	}
1867
1868	/* assoc/disassoc, or maybe AID changed */
1869	if (changed & BSS_CHANGED_ASSOC) {
1870		wsm_lock_tx(priv);
1871		priv->wep_default_key_id = -1;
1872		wsm_unlock_tx(priv);
1873	}
1874
1875	if (changed & BSS_CHANGED_BSSID) {
1876		pr_debug("BSS_CHANGED_BSSID\n");
1877		do_join = true;
1878	}
1879
1880	if (changed &
1881	    (BSS_CHANGED_ASSOC |
1882	     BSS_CHANGED_BSSID |
1883	     BSS_CHANGED_IBSS |
1884	     BSS_CHANGED_BASIC_RATES |
1885	     BSS_CHANGED_HT)) {
1886		pr_debug("BSS_CHANGED_ASSOC\n");
1887		if (vif->cfg.assoc) {
1888			if (priv->join_status < CW1200_JOIN_STATUS_PRE_STA) {
1889				ieee80211_connection_loss(vif);
1890				mutex_unlock(&priv->conf_mutex);
1891				return;
1892			} else if (priv->join_status == CW1200_JOIN_STATUS_PRE_STA) {
1893				priv->join_status = CW1200_JOIN_STATUS_STA;
1894			}
1895		} else {
1896			do_join = true;
1897		}
1898
1899		if (vif->cfg.assoc || vif->cfg.ibss_joined) {
1900			struct ieee80211_sta *sta = NULL;
1901			__le32 htprot = 0;
1902
1903			if (info->dtim_period)
1904				priv->join_dtim_period = info->dtim_period;
1905			priv->beacon_int = info->beacon_int;
1906
1907			rcu_read_lock();
1908
1909			if (info->bssid && !vif->cfg.ibss_joined)
1910				sta = ieee80211_find_sta(vif, info->bssid);
1911			if (sta) {
1912				priv->ht_info.ht_cap = sta->deflink.ht_cap;
1913				priv->bss_params.operational_rate_set =
1914					cw1200_rate_mask_to_wsm(priv,
1915						sta->deflink.supp_rates[priv->channel->band]);
1916				priv->ht_info.channel_type = cfg80211_get_chandef_type(&dev->conf.chandef);
1917				priv->ht_info.operation_mode = info->ht_operation_mode;
1918			} else {
1919				memset(&priv->ht_info, 0,
1920				       sizeof(priv->ht_info));
1921				priv->bss_params.operational_rate_set = -1;
1922			}
1923			rcu_read_unlock();
1924
1925			/* Non Greenfield stations present */
1926			if (priv->ht_info.operation_mode &
1927			    IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT)
1928				htprot |= cpu_to_le32(WSM_NON_GREENFIELD_STA_PRESENT);
1929
1930			/* Set HT protection method */
1931			htprot |= cpu_to_le32((priv->ht_info.operation_mode & IEEE80211_HT_OP_MODE_PROTECTION) << 2);
1932
1933			/* TODO:
1934			 * STBC_param.dual_cts
1935			 *  STBC_param.LSIG_TXOP_FILL
1936			 */
1937
1938			wsm_write_mib(priv, WSM_MIB_ID_SET_HT_PROTECTION,
1939				      &htprot, sizeof(htprot));
1940
1941			priv->association_mode.greenfield =
1942				cw1200_ht_greenfield(&priv->ht_info);
1943			priv->association_mode.flags =
1944				WSM_ASSOCIATION_MODE_SNOOP_ASSOC_FRAMES |
1945				WSM_ASSOCIATION_MODE_USE_PREAMBLE_TYPE |
1946				WSM_ASSOCIATION_MODE_USE_HT_MODE |
1947				WSM_ASSOCIATION_MODE_USE_BASIC_RATE_SET |
1948				WSM_ASSOCIATION_MODE_USE_MPDU_START_SPACING;
1949			priv->association_mode.preamble =
1950				info->use_short_preamble ?
1951				WSM_JOIN_PREAMBLE_SHORT :
1952				WSM_JOIN_PREAMBLE_LONG;
1953			priv->association_mode.basic_rate_set = __cpu_to_le32(
1954				cw1200_rate_mask_to_wsm(priv,
1955							info->basic_rates));
1956			priv->association_mode.mpdu_start_spacing =
1957				cw1200_ht_ampdu_density(&priv->ht_info);
1958
1959			cw1200_cqm_bssloss_sm(priv, 0, 0, 0);
1960			cancel_work_sync(&priv->unjoin_work);
1961
1962			priv->bss_params.beacon_lost_count = priv->cqm_beacon_loss_count;
1963			priv->bss_params.aid = vif->cfg.aid;
1964
1965			if (priv->join_dtim_period < 1)
1966				priv->join_dtim_period = 1;
1967
1968			pr_debug("[STA] DTIM %d, interval: %d\n",
1969				 priv->join_dtim_period, priv->beacon_int);
1970			pr_debug("[STA] Preamble: %d, Greenfield: %d, Aid: %d, Rates: 0x%.8X, Basic: 0x%.8X\n",
1971				 priv->association_mode.preamble,
1972				 priv->association_mode.greenfield,
1973				 priv->bss_params.aid,
1974				 priv->bss_params.operational_rate_set,
1975				 priv->association_mode.basic_rate_set);
1976			wsm_set_association_mode(priv, &priv->association_mode);
1977
1978			if (!vif->cfg.ibss_joined) {
1979				wsm_keep_alive_period(priv, 30 /* sec */);
1980				wsm_set_bss_params(priv, &priv->bss_params);
1981				priv->setbssparams_done = true;
1982				cw1200_set_beacon_wakeup_period_work(&priv->set_beacon_wakeup_period_work);
1983				cw1200_set_pm(priv, &priv->powersave_mode);
1984			}
1985			if (priv->vif->p2p) {
1986				pr_debug("[STA] Setting p2p powersave configuration.\n");
1987				wsm_set_p2p_ps_modeinfo(priv,
1988							&priv->p2p_ps_modeinfo);
1989			}
1990			if (priv->bt_present)
1991				cw1200_set_btcoexinfo(priv);
1992		} else {
1993			memset(&priv->association_mode, 0,
1994			       sizeof(priv->association_mode));
1995			memset(&priv->bss_params, 0, sizeof(priv->bss_params));
1996		}
1997	}
1998
1999	/* ERP Protection */
2000	if (changed & (BSS_CHANGED_ASSOC |
2001		       BSS_CHANGED_ERP_CTS_PROT |
2002		       BSS_CHANGED_ERP_PREAMBLE)) {
2003		u32 prev_erp_info = priv->erp_info;
2004		if (info->use_cts_prot)
2005			priv->erp_info |= WLAN_ERP_USE_PROTECTION;
2006		else if (!(prev_erp_info & WLAN_ERP_NON_ERP_PRESENT))
2007			priv->erp_info &= ~WLAN_ERP_USE_PROTECTION;
2008
2009		if (info->use_short_preamble)
2010			priv->erp_info |= WLAN_ERP_BARKER_PREAMBLE;
2011		else
2012			priv->erp_info &= ~WLAN_ERP_BARKER_PREAMBLE;
2013
2014		pr_debug("[STA] ERP Protection: %x\n", priv->erp_info);
2015
2016		if (prev_erp_info != priv->erp_info)
2017			queue_work(priv->workqueue, &priv->set_cts_work);
2018	}
2019
2020	/* ERP Slottime */
2021	if (changed & (BSS_CHANGED_ASSOC | BSS_CHANGED_ERP_SLOT)) {
2022		__le32 slot_time = info->use_short_slot ?
2023			__cpu_to_le32(9) : __cpu_to_le32(20);
2024		pr_debug("[STA] Slot time: %d us.\n",
2025			 __le32_to_cpu(slot_time));
2026		wsm_write_mib(priv, WSM_MIB_ID_DOT11_SLOT_TIME,
2027			      &slot_time, sizeof(slot_time));
2028	}
2029
2030	if (changed & (BSS_CHANGED_ASSOC | BSS_CHANGED_CQM)) {
2031		struct wsm_rcpi_rssi_threshold threshold = {
2032			.rollingAverageCount = 8,
2033		};
2034		pr_debug("[CQM] RSSI threshold subscribe: %d +- %d\n",
2035			 info->cqm_rssi_thold, info->cqm_rssi_hyst);
2036		priv->cqm_rssi_thold = info->cqm_rssi_thold;
2037		priv->cqm_rssi_hyst = info->cqm_rssi_hyst;
2038
2039		if (info->cqm_rssi_thold || info->cqm_rssi_hyst) {
2040			/* RSSI subscription enabled */
2041			/* TODO: It's not a correct way of setting threshold.
2042			 * Upper and lower must be set equal here and adjusted
2043			 * in callback. However current implementation is much
2044			 * more relaible and stable.
2045			 */
2046
2047			/* RSSI: signed Q8.0, RCPI: unsigned Q7.1
2048			 * RSSI = RCPI / 2 - 110
2049			 */
2050			if (priv->cqm_use_rssi) {
2051				threshold.upperThreshold =
2052					info->cqm_rssi_thold + info->cqm_rssi_hyst;
2053				threshold.lowerThreshold =
2054					info->cqm_rssi_thold;
2055				threshold.rssiRcpiMode |= WSM_RCPI_RSSI_USE_RSSI;
2056			} else {
2057				threshold.upperThreshold = (info->cqm_rssi_thold + info->cqm_rssi_hyst + 110) * 2;
2058				threshold.lowerThreshold = (info->cqm_rssi_thold + 110) * 2;
2059			}
2060			threshold.rssiRcpiMode |= WSM_RCPI_RSSI_THRESHOLD_ENABLE;
2061		} else {
2062			/* There is a bug in FW, see sta.c. We have to enable
2063			 * dummy subscription to get correct RSSI values.
2064			 */
2065			threshold.rssiRcpiMode |=
2066				WSM_RCPI_RSSI_THRESHOLD_ENABLE |
2067				WSM_RCPI_RSSI_DONT_USE_UPPER |
2068				WSM_RCPI_RSSI_DONT_USE_LOWER;
2069			if (priv->cqm_use_rssi)
2070				threshold.rssiRcpiMode |= WSM_RCPI_RSSI_USE_RSSI;
2071		}
2072		wsm_set_rcpi_rssi_threshold(priv, &threshold);
2073	}
2074	mutex_unlock(&priv->conf_mutex);
2075
2076	if (do_join) {
2077		wsm_lock_tx(priv);
2078		cw1200_do_join(priv); /* Will unlock it for us */
2079	}
2080}
2081
2082void cw1200_multicast_start_work(struct work_struct *work)
2083{
2084	struct cw1200_common *priv =
2085		container_of(work, struct cw1200_common, multicast_start_work);
2086	long tmo = priv->join_dtim_period *
2087			(priv->beacon_int + 20) * HZ / 1024;
2088
2089	cancel_work_sync(&priv->multicast_stop_work);
2090
2091	if (!priv->aid0_bit_set) {
2092		wsm_lock_tx(priv);
2093		cw1200_set_tim_impl(priv, true);
2094		priv->aid0_bit_set = true;
2095		mod_timer(&priv->mcast_timeout, jiffies + tmo);
2096		wsm_unlock_tx(priv);
2097	}
2098}
2099
2100void cw1200_multicast_stop_work(struct work_struct *work)
2101{
2102	struct cw1200_common *priv =
2103		container_of(work, struct cw1200_common, multicast_stop_work);
2104
2105	if (priv->aid0_bit_set) {
2106		timer_delete_sync(&priv->mcast_timeout);
2107		wsm_lock_tx(priv);
2108		priv->aid0_bit_set = false;
2109		cw1200_set_tim_impl(priv, false);
2110		wsm_unlock_tx(priv);
2111	}
2112}
2113
2114void cw1200_mcast_timeout(struct timer_list *t)
2115{
2116	struct cw1200_common *priv = timer_container_of(priv, t,
2117							mcast_timeout);
2118
2119	wiphy_warn(priv->hw->wiphy,
2120		   "Multicast delivery timeout.\n");
2121	spin_lock_bh(&priv->ps_state_lock);
2122	priv->tx_multicast = priv->aid0_bit_set &&
2123			priv->buffered_multicasts;
2124	if (priv->tx_multicast)
2125		cw1200_bh_wakeup(priv);
2126	spin_unlock_bh(&priv->ps_state_lock);
2127}
2128
2129int cw1200_ampdu_action(struct ieee80211_hw *hw,
2130			struct ieee80211_vif *vif,
2131			struct ieee80211_ampdu_params *params)
2132{
2133	/* Aggregation is implemented fully in firmware,
2134	 * including block ack negotiation. Do not allow
2135	 * mac80211 stack to do anything: it interferes with
2136	 * the firmware.
2137	 */
2138
2139	/* Note that we still need this function stubbed. */
2140	return -ENOTSUPP;
2141}
2142
2143/* ******************************************************************** */
2144/* WSM callback								*/
2145void cw1200_suspend_resume(struct cw1200_common *priv,
2146			  struct wsm_suspend_resume *arg)
2147{
2148	pr_debug("[AP] %s: %s\n",
2149		 arg->stop ? "stop" : "start",
2150		 arg->multicast ? "broadcast" : "unicast");
2151
2152	if (arg->multicast) {
2153		bool cancel_tmo = false;
2154		spin_lock_bh(&priv->ps_state_lock);
2155		if (arg->stop) {
2156			priv->tx_multicast = false;
2157		} else {
2158			/* Firmware sends this indication every DTIM if there
2159			 * is a STA in powersave connected. There is no reason
2160			 * to suspend, following wakeup will consume much more
2161			 * power than it could be saved.
2162			 */
2163			cw1200_pm_stay_awake(&priv->pm_state,
2164					     priv->join_dtim_period *
2165					     (priv->beacon_int + 20) * HZ / 1024);
2166			priv->tx_multicast = (priv->aid0_bit_set &&
2167					      priv->buffered_multicasts);
2168			if (priv->tx_multicast) {
2169				cancel_tmo = true;
2170				cw1200_bh_wakeup(priv);
2171			}
2172		}
2173		spin_unlock_bh(&priv->ps_state_lock);
2174		if (cancel_tmo)
2175			timer_delete_sync(&priv->mcast_timeout);
2176	} else {
2177		spin_lock_bh(&priv->ps_state_lock);
2178		cw1200_ps_notify(priv, arg->link_id, arg->stop);
2179		spin_unlock_bh(&priv->ps_state_lock);
2180		if (!arg->stop)
2181			cw1200_bh_wakeup(priv);
2182	}
2183	return;
2184}
2185
2186/* ******************************************************************** */
2187/* AP privates								*/
2188
2189static int cw1200_upload_beacon(struct cw1200_common *priv)
2190{
2191	int ret = 0;
2192	struct ieee80211_mgmt *mgmt;
2193	struct wsm_template_frame frame = {
2194		.frame_type = WSM_FRAME_TYPE_BEACON,
2195	};
2196
2197	u16 tim_offset;
2198	u16 tim_len;
2199
2200	if (priv->mode == NL80211_IFTYPE_STATION ||
2201	    priv->mode == NL80211_IFTYPE_MONITOR ||
2202	    priv->mode == NL80211_IFTYPE_UNSPECIFIED)
2203		goto done;
2204
2205	if (priv->vif->p2p)
2206		frame.rate = WSM_TRANSMIT_RATE_6;
2207
2208	frame.skb = ieee80211_beacon_get_tim(priv->hw, priv->vif,
2209					     &tim_offset, &tim_len, 0);
2210	if (!frame.skb)
2211		return -ENOMEM;
2212
2213	ret = wsm_set_template_frame(priv, &frame);
2214
2215	if (ret)
2216		goto done;
2217
2218	/* TODO: Distill probe resp; remove TIM
2219	 * and any other beacon-specific IEs
2220	 */
2221	mgmt = (void *)frame.skb->data;
2222	mgmt->frame_control =
2223		__cpu_to_le16(IEEE80211_FTYPE_MGMT |
2224			      IEEE80211_STYPE_PROBE_RESP);
2225
2226	frame.frame_type = WSM_FRAME_TYPE_PROBE_RESPONSE;
2227	if (priv->vif->p2p) {
2228		ret = wsm_set_probe_responder(priv, true);
2229	} else {
2230		ret = wsm_set_template_frame(priv, &frame);
2231		wsm_set_probe_responder(priv, false);
2232	}
2233
2234done:
2235	dev_kfree_skb(frame.skb);
2236
2237	return ret;
2238}
2239
2240static int cw1200_upload_pspoll(struct cw1200_common *priv)
2241{
2242	int ret = 0;
2243	struct wsm_template_frame frame = {
2244		.frame_type = WSM_FRAME_TYPE_PS_POLL,
2245		.rate = 0xFF,
2246	};
2247
2248
2249	frame.skb = ieee80211_pspoll_get(priv->hw, priv->vif);
2250	if (!frame.skb)
2251		return -ENOMEM;
2252
2253	ret = wsm_set_template_frame(priv, &frame);
2254
2255	dev_kfree_skb(frame.skb);
2256
2257	return ret;
2258}
2259
2260static int cw1200_upload_null(struct cw1200_common *priv)
2261{
2262	int ret = 0;
2263	struct wsm_template_frame frame = {
2264		.frame_type = WSM_FRAME_TYPE_NULL,
2265		.rate = 0xFF,
2266	};
2267
2268	frame.skb = ieee80211_nullfunc_get(priv->hw, priv->vif,-1, false);
2269	if (!frame.skb)
2270		return -ENOMEM;
2271
2272	ret = wsm_set_template_frame(priv, &frame);
2273
2274	dev_kfree_skb(frame.skb);
2275
2276	return ret;
2277}
2278
2279static int cw1200_upload_qosnull(struct cw1200_common *priv)
2280{
2281	/* TODO:  This needs to be implemented
2282
2283	struct wsm_template_frame frame = {
2284		.frame_type = WSM_FRAME_TYPE_QOS_NULL,
2285		.rate = 0xFF,
2286	};
2287
2288	frame.skb = ieee80211_qosnullfunc_get(priv->hw, priv->vif);
2289	if (!frame.skb)
2290		return -ENOMEM;
2291
2292	ret = wsm_set_template_frame(priv, &frame);
2293
2294	dev_kfree_skb(frame.skb);
2295
2296	*/
2297	return 0;
2298}
2299
2300static int cw1200_enable_beaconing(struct cw1200_common *priv,
2301				   bool enable)
2302{
2303	struct wsm_beacon_transmit transmit = {
2304		.enable_beaconing = enable,
2305	};
2306
2307	return wsm_beacon_transmit(priv, &transmit);
2308}
2309
2310static int cw1200_start_ap(struct cw1200_common *priv)
2311{
2312	int ret;
2313	struct ieee80211_bss_conf *conf = &priv->vif->bss_conf;
2314	struct wsm_start start = {
2315		.mode = priv->vif->p2p ?
2316				WSM_START_MODE_P2P_GO : WSM_START_MODE_AP,
2317		.band = (priv->channel->band == NL80211_BAND_5GHZ) ?
2318				WSM_PHY_BAND_5G : WSM_PHY_BAND_2_4G,
2319		.channel_number = priv->channel->hw_value,
2320		.beacon_interval = conf->beacon_int,
2321		.dtim_period = conf->dtim_period,
2322		.preamble = conf->use_short_preamble ?
2323				WSM_JOIN_PREAMBLE_SHORT :
2324				WSM_JOIN_PREAMBLE_LONG,
2325		.probe_delay = 100,
2326		.basic_rate_set = cw1200_rate_mask_to_wsm(priv,
2327				conf->basic_rates),
2328	};
2329	struct wsm_operational_mode mode = {
2330		.power_mode = cw1200_power_mode,
2331		.disable_more_flag_usage = true,
2332	};
2333
2334	memset(start.ssid, 0, sizeof(start.ssid));
2335	if (!conf->hidden_ssid) {
2336		start.ssid_len = priv->vif->cfg.ssid_len;
2337		memcpy(start.ssid, priv->vif->cfg.ssid, start.ssid_len);
2338	}
2339
2340	priv->beacon_int = conf->beacon_int;
2341	priv->join_dtim_period = conf->dtim_period;
2342
2343	memset(&priv->link_id_db, 0, sizeof(priv->link_id_db));
2344
2345	pr_debug("[AP] ch: %d(%d), bcn: %d(%d), brt: 0x%.8X, ssid: %.*s.\n",
2346		 start.channel_number, start.band,
2347		 start.beacon_interval, start.dtim_period,
2348		 start.basic_rate_set,
2349		 start.ssid_len, start.ssid);
2350	ret = wsm_start(priv, &start);
2351	if (!ret)
2352		ret = cw1200_upload_keys(priv);
2353	if (!ret && priv->vif->p2p) {
2354		pr_debug("[AP] Setting p2p powersave configuration.\n");
2355		wsm_set_p2p_ps_modeinfo(priv, &priv->p2p_ps_modeinfo);
2356	}
2357	if (!ret) {
2358		wsm_set_block_ack_policy(priv, 0, 0);
2359		priv->join_status = CW1200_JOIN_STATUS_AP;
2360		cw1200_update_filtering(priv);
2361	}
2362	wsm_set_operational_mode(priv, &mode);
2363	return ret;
2364}
2365
2366static int cw1200_update_beaconing(struct cw1200_common *priv)
2367{
2368	struct ieee80211_bss_conf *conf = &priv->vif->bss_conf;
2369	struct wsm_reset reset = {
2370		.link_id = 0,
2371		.reset_statistics = true,
2372	};
2373
2374	if (priv->mode == NL80211_IFTYPE_AP) {
2375		/* TODO: check if changed channel, band */
2376		if (priv->join_status != CW1200_JOIN_STATUS_AP ||
2377		    priv->beacon_int != conf->beacon_int) {
2378			pr_debug("ap restarting\n");
2379			wsm_lock_tx(priv);
2380			if (priv->join_status != CW1200_JOIN_STATUS_PASSIVE)
2381				wsm_reset(priv, &reset);
2382			priv->join_status = CW1200_JOIN_STATUS_PASSIVE;
2383			cw1200_start_ap(priv);
2384			wsm_unlock_tx(priv);
2385		} else
2386			pr_debug("ap started join_status: %d\n",
2387				 priv->join_status);
2388	}
2389	return 0;
2390}