1/*
   2 * Copyright (c) 2008-2011 Atheros Communications Inc.
   3 *
   4 * Permission to use, copy, modify, and/or distribute this software for any
   5 * purpose with or without fee is hereby granted, provided that the above
   6 * copyright notice and this permission notice appear in all copies.
   7 *
   8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
   9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  15 */
  16
  17#include <linux/nl80211.h>
  18#include <linux/delay.h>
  19#include "ath9k.h"
  20#include "btcoex.h"
  21
  22static u8 parse_mpdudensity(u8 mpdudensity)
 
 
 
  23{
  24	/*
  25	 * 802.11n D2.0 defined values for "Minimum MPDU Start Spacing":
  26	 *   0 for no restriction
  27	 *   1 for 1/4 us
  28	 *   2 for 1/2 us
  29	 *   3 for 1 us
  30	 *   4 for 2 us
  31	 *   5 for 4 us
  32	 *   6 for 8 us
  33	 *   7 for 16 us
  34	 */
  35	switch (mpdudensity) {
  36	case 0:
  37		return 0;
  38	case 1:
  39	case 2:
  40	case 3:
  41		/* Our lower layer calculations limit our precision to
  42		   1 microsecond */
  43		return 1;
  44	case 4:
  45		return 2;
  46	case 5:
  47		return 4;
  48	case 6:
  49		return 8;
  50	case 7:
  51		return 16;
  52	default:
  53		return 0;
  54	}
  55}
  56
  57static bool ath9k_has_pending_frames(struct ath_softc *sc, struct ath_txq *txq)
 
  58{
  59	bool pending = false;
  60
  61	spin_lock_bh(&txq->axq_lock);
  62
  63	if (txq->axq_depth || !list_empty(&txq->axq_acq))
  64		pending = true;
 
 
 
 
 
  65
 
 
 
 
 
 
 
 
  66	spin_unlock_bh(&txq->axq_lock);
  67	return pending;
  68}
  69
  70static bool ath9k_setpower(struct ath_softc *sc, enum ath9k_power_mode mode)
  71{
  72	unsigned long flags;
  73	bool ret;
  74
  75	spin_lock_irqsave(&sc->sc_pm_lock, flags);
  76	ret = ath9k_hw_setpower(sc->sc_ah, mode);
  77	spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
  78
  79	return ret;
  80}
  81
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  82void ath9k_ps_wakeup(struct ath_softc *sc)
  83{
  84	struct ath_common *common = ath9k_hw_common(sc->sc_ah);
  85	unsigned long flags;
  86	enum ath9k_power_mode power_mode;
  87
  88	spin_lock_irqsave(&sc->sc_pm_lock, flags);
  89	if (++sc->ps_usecount != 1)
  90		goto unlock;
  91
 
  92	power_mode = sc->sc_ah->power_mode;
  93	ath9k_hw_setpower(sc->sc_ah, ATH9K_PM_AWAKE);
  94
  95	/*
  96	 * While the hardware is asleep, the cycle counters contain no
  97	 * useful data. Better clear them now so that they don't mess up
  98	 * survey data results.
  99	 */
 100	if (power_mode != ATH9K_PM_AWAKE) {
 101		spin_lock(&common->cc_lock);
 102		ath_hw_cycle_counters_update(common);
 103		memset(&common->cc_survey, 0, sizeof(common->cc_survey));
 
 104		spin_unlock(&common->cc_lock);
 105	}
 106
 107 unlock:
 108	spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
 109}
 110
 111void ath9k_ps_restore(struct ath_softc *sc)
 112{
 113	struct ath_common *common = ath9k_hw_common(sc->sc_ah);
 
 114	unsigned long flags;
 115
 116	spin_lock_irqsave(&sc->sc_pm_lock, flags);
 117	if (--sc->ps_usecount != 0)
 118		goto unlock;
 119
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 120	spin_lock(&common->cc_lock);
 121	ath_hw_cycle_counters_update(common);
 122	spin_unlock(&common->cc_lock);
 123
 124	if (sc->ps_idle)
 125		ath9k_hw_setpower(sc->sc_ah, ATH9K_PM_FULL_SLEEP);
 126	else if (sc->ps_enabled &&
 127		 !(sc->ps_flags & (PS_WAIT_FOR_BEACON |
 128			      PS_WAIT_FOR_CAB |
 129			      PS_WAIT_FOR_PSPOLL_DATA |
 130			      PS_WAIT_FOR_TX_ACK)))
 131		ath9k_hw_setpower(sc->sc_ah, ATH9K_PM_NETWORK_SLEEP);
 132
 133 unlock:
 134	spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
 135}
 136
 137void ath_start_ani(struct ath_common *common)
 138{
 139	struct ath_hw *ah = common->ah;
 140	unsigned long timestamp = jiffies_to_msecs(jiffies);
 141	struct ath_softc *sc = (struct ath_softc *) common->priv;
 142
 143	if (!(sc->sc_flags & SC_OP_ANI_RUN))
 144		return;
 145
 146	if (sc->sc_flags & SC_OP_OFFCHANNEL)
 147		return;
 148
 149	common->ani.longcal_timer = timestamp;
 150	common->ani.shortcal_timer = timestamp;
 151	common->ani.checkani_timer = timestamp;
 152
 153	mod_timer(&common->ani.timer,
 154		  jiffies +
 155			msecs_to_jiffies((u32)ah->config.ani_poll_interval));
 
 156}
 157
 158static void ath_update_survey_nf(struct ath_softc *sc, int channel)
 159{
 160	struct ath_hw *ah = sc->sc_ah;
 161	struct ath9k_channel *chan = &ah->channels[channel];
 162	struct survey_info *survey = &sc->survey[channel];
 163
 164	if (chan->noisefloor) {
 165		survey->filled |= SURVEY_INFO_NOISE_DBM;
 166		survey->noise = chan->noisefloor;
 167	}
 168}
 169
 170/*
 171 * Updates the survey statistics and returns the busy time since last
 172 * update in %, if the measurement duration was long enough for the
 173 * result to be useful, -1 otherwise.
 174 */
 175static int ath_update_survey_stats(struct ath_softc *sc)
 176{
 177	struct ath_hw *ah = sc->sc_ah;
 178	struct ath_common *common = ath9k_hw_common(ah);
 179	int pos = ah->curchan - &ah->channels[0];
 180	struct survey_info *survey = &sc->survey[pos];
 181	struct ath_cycle_counters *cc = &common->cc_survey;
 182	unsigned int div = common->clockrate * 1000;
 183	int ret = 0;
 184
 185	if (!ah->curchan)
 186		return -1;
 
 187
 188	if (ah->power_mode == ATH9K_PM_AWAKE)
 189		ath_hw_cycle_counters_update(common);
 190
 191	if (cc->cycles > 0) {
 192		survey->filled |= SURVEY_INFO_CHANNEL_TIME |
 193			SURVEY_INFO_CHANNEL_TIME_BUSY |
 194			SURVEY_INFO_CHANNEL_TIME_RX |
 195			SURVEY_INFO_CHANNEL_TIME_TX;
 196		survey->channel_time += cc->cycles / div;
 197		survey->channel_time_busy += cc->rx_busy / div;
 198		survey->channel_time_rx += cc->rx_frame / div;
 199		survey->channel_time_tx += cc->tx_frame / div;
 200	}
 201
 202	if (cc->cycles < div)
 203		return -1;
 204
 205	if (cc->cycles > 0)
 206		ret = cc->rx_busy * 100 / cc->cycles;
 207
 208	memset(cc, 0, sizeof(*cc));
 209
 210	ath_update_survey_nf(sc, pos);
 211
 212	return ret;
 213}
 214
 215/*
 216 * Set/change channels.  If the channel is really being changed, it's done
 217 * by reseting the chip.  To accomplish this we must first cleanup any pending
 218 * DMA, then restart stuff.
 219*/
 220static int ath_set_channel(struct ath_softc *sc, struct ieee80211_hw *hw,
 221		    struct ath9k_channel *hchan)
 222{
 223	struct ath_hw *ah = sc->sc_ah;
 224	struct ath_common *common = ath9k_hw_common(ah);
 225	struct ieee80211_conf *conf = &common->hw->conf;
 226	bool fastcc = true, stopped;
 227	struct ieee80211_channel *channel = hw->conf.channel;
 228	struct ath9k_hw_cal_data *caldata = NULL;
 229	int r;
 230
 231	if (sc->sc_flags & SC_OP_INVALID)
 232		return -EIO;
 233
 234	sc->hw_busy_count = 0;
 235
 236	del_timer_sync(&common->ani.timer);
 237	cancel_work_sync(&sc->paprd_work);
 238	cancel_work_sync(&sc->hw_check_work);
 239	cancel_delayed_work_sync(&sc->tx_complete_work);
 240	cancel_delayed_work_sync(&sc->hw_pll_work);
 241
 242	ath9k_ps_wakeup(sc);
 243
 244	spin_lock_bh(&sc->sc_pcu_lock);
 245
 246	/*
 247	 * This is only performed if the channel settings have
 248	 * actually changed.
 249	 *
 250	 * To switch channels clear any pending DMA operations;
 251	 * wait long enough for the RX fifo to drain, reset the
 252	 * hardware at the new frequency, and then re-enable
 253	 * the relevant bits of the h/w.
 254	 */
 255	ath9k_hw_disable_interrupts(ah);
 256	stopped = ath_drain_all_txq(sc, false);
 257
 258	if (!ath_stoprecv(sc))
 259		stopped = false;
 260
 261	if (!ath9k_hw_check_alive(ah))
 262		stopped = false;
 263
 264	/* XXX: do not flush receive queue here. We don't want
 265	 * to flush data frames already in queue because of
 266	 * changing channel. */
 267
 268	if (!stopped || !(sc->sc_flags & SC_OP_OFFCHANNEL))
 269		fastcc = false;
 270
 271	if (!(sc->sc_flags & SC_OP_OFFCHANNEL))
 272		caldata = &sc->caldata;
 273
 274	ath_dbg(common, ATH_DBG_CONFIG,
 275		"(%u MHz) -> (%u MHz), conf_is_ht40: %d fastcc: %d\n",
 276		sc->sc_ah->curchan->channel,
 277		channel->center_freq, conf_is_ht40(conf),
 278		fastcc);
 279
 280	r = ath9k_hw_reset(ah, hchan, caldata, fastcc);
 281	if (r) {
 282		ath_err(common,
 283			"Unable to reset channel (%u MHz), reset status %d\n",
 284			channel->center_freq, r);
 285		goto ps_restore;
 286	}
 287
 288	if (ath_startrecv(sc) != 0) {
 289		ath_err(common, "Unable to restart recv logic\n");
 290		r = -EIO;
 291		goto ps_restore;
 292	}
 293
 294	ath9k_cmn_update_txpow(ah, sc->curtxpow,
 295			       sc->config.txpowlimit, &sc->curtxpow);
 296	ath9k_hw_set_interrupts(ah, ah->imask);
 297
 298	if (!(sc->sc_flags & (SC_OP_OFFCHANNEL))) {
 299		if (sc->sc_flags & SC_OP_BEACONS)
 300			ath_set_beacon(sc);
 301		ieee80211_queue_delayed_work(sc->hw, &sc->tx_complete_work, 0);
 302		ieee80211_queue_delayed_work(sc->hw, &sc->hw_pll_work, HZ/2);
 303		if (!common->disable_ani)
 304			ath_start_ani(common);
 305	}
 306
 307 ps_restore:
 308	ieee80211_wake_queues(hw);
 309
 310	spin_unlock_bh(&sc->sc_pcu_lock);
 311
 312	ath9k_ps_restore(sc);
 313	return r;
 314}
 315
 316static void ath_paprd_activate(struct ath_softc *sc)
 317{
 318	struct ath_hw *ah = sc->sc_ah;
 319	struct ath9k_hw_cal_data *caldata = ah->caldata;
 320	struct ath_common *common = ath9k_hw_common(ah);
 321	int chain;
 322
 323	if (!caldata || !caldata->paprd_done)
 324		return;
 325
 326	ath9k_ps_wakeup(sc);
 327	ar9003_paprd_enable(ah, false);
 328	for (chain = 0; chain < AR9300_MAX_CHAINS; chain++) {
 329		if (!(common->tx_chainmask & BIT(chain)))
 330			continue;
 331
 332		ar9003_paprd_populate_single_table(ah, caldata, chain);
 333	}
 334
 335	ar9003_paprd_enable(ah, true);
 336	ath9k_ps_restore(sc);
 337}
 338
 339static bool ath_paprd_send_frame(struct ath_softc *sc, struct sk_buff *skb, int chain)
 340{
 341	struct ieee80211_hw *hw = sc->hw;
 342	struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
 343	struct ath_hw *ah = sc->sc_ah;
 344	struct ath_common *common = ath9k_hw_common(ah);
 345	struct ath_tx_control txctl;
 346	int time_left;
 347
 348	memset(&txctl, 0, sizeof(txctl));
 349	txctl.txq = sc->tx.txq_map[WME_AC_BE];
 350
 351	memset(tx_info, 0, sizeof(*tx_info));
 352	tx_info->band = hw->conf.channel->band;
 353	tx_info->flags |= IEEE80211_TX_CTL_NO_ACK;
 354	tx_info->control.rates[0].idx = 0;
 355	tx_info->control.rates[0].count = 1;
 356	tx_info->control.rates[0].flags = IEEE80211_TX_RC_MCS;
 357	tx_info->control.rates[1].idx = -1;
 
 
 
 
 
 
 
 
 
 358
 359	init_completion(&sc->paprd_complete);
 360	txctl.paprd = BIT(chain);
 361
 362	if (ath_tx_start(hw, skb, &txctl) != 0) {
 363		ath_dbg(common, ATH_DBG_CALIBRATE, "PAPRD TX failed\n");
 364		dev_kfree_skb_any(skb);
 365		return false;
 
 
 
 
 
 
 
 
 
 
 366	}
 367
 368	time_left = wait_for_completion_timeout(&sc->paprd_complete,
 369			msecs_to_jiffies(ATH_PAPRD_TIMEOUT));
 370
 371	if (!time_left)
 372		ath_dbg(common, ATH_DBG_CALIBRATE,
 373			"Timeout waiting for paprd training on TX chain %d\n",
 374			chain);
 375
 376	return !!time_left;
 377}
 378
 379void ath_paprd_calibrate(struct work_struct *work)
 380{
 381	struct ath_softc *sc = container_of(work, struct ath_softc, paprd_work);
 382	struct ieee80211_hw *hw = sc->hw;
 383	struct ath_hw *ah = sc->sc_ah;
 384	struct ieee80211_hdr *hdr;
 385	struct sk_buff *skb = NULL;
 386	struct ath9k_hw_cal_data *caldata = ah->caldata;
 387	struct ath_common *common = ath9k_hw_common(ah);
 388	int ftype;
 389	int chain_ok = 0;
 390	int chain;
 391	int len = 1800;
 392
 393	if (!caldata)
 394		return;
 395
 396	ath9k_ps_wakeup(sc);
 397
 398	if (ar9003_paprd_init_table(ah) < 0)
 399		goto fail_paprd;
 400
 401	skb = alloc_skb(len, GFP_KERNEL);
 402	if (!skb)
 403		goto fail_paprd;
 404
 405	skb_put(skb, len);
 406	memset(skb->data, 0, len);
 407	hdr = (struct ieee80211_hdr *)skb->data;
 408	ftype = IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC;
 409	hdr->frame_control = cpu_to_le16(ftype);
 410	hdr->duration_id = cpu_to_le16(10);
 411	memcpy(hdr->addr1, hw->wiphy->perm_addr, ETH_ALEN);
 412	memcpy(hdr->addr2, hw->wiphy->perm_addr, ETH_ALEN);
 413	memcpy(hdr->addr3, hw->wiphy->perm_addr, ETH_ALEN);
 414
 415	for (chain = 0; chain < AR9300_MAX_CHAINS; chain++) {
 416		if (!(common->tx_chainmask & BIT(chain)))
 417			continue;
 418
 419		chain_ok = 0;
 420
 421		ath_dbg(common, ATH_DBG_CALIBRATE,
 422			"Sending PAPRD frame for thermal measurement "
 423			"on chain %d\n", chain);
 424		if (!ath_paprd_send_frame(sc, skb, chain))
 425			goto fail_paprd;
 426
 427		ar9003_paprd_setup_gain_table(ah, chain);
 428
 429		ath_dbg(common, ATH_DBG_CALIBRATE,
 430			"Sending PAPRD training frame on chain %d\n", chain);
 431		if (!ath_paprd_send_frame(sc, skb, chain))
 432			goto fail_paprd;
 433
 434		if (!ar9003_paprd_is_done(ah)) {
 435			ath_dbg(common, ATH_DBG_CALIBRATE,
 436				"PAPRD not yet done on chain %d\n", chain);
 437			break;
 438		}
 439
 440		if (ar9003_paprd_create_curve(ah, caldata, chain)) {
 441			ath_dbg(common, ATH_DBG_CALIBRATE,
 442				"PAPRD create curve failed on chain %d\n",
 443								   chain);
 444			break;
 445		}
 446
 447		chain_ok = 1;
 
 
 448	}
 449	kfree_skb(skb);
 450
 451	if (chain_ok) {
 452		caldata->paprd_done = true;
 453		ath_paprd_activate(sc);
 454	}
 455
 456fail_paprd:
 457	ath9k_ps_restore(sc);
 458}
 459
 460/*
 461 *  This routine performs the periodic noise floor calibration function
 462 *  that is used to adjust and optimize the chip performance.  This
 463 *  takes environmental changes (location, temperature) into account.
 464 *  When the task is complete, it reschedules itself depending on the
 465 *  appropriate interval that was calculated.
 466 */
 467void ath_ani_calibrate(unsigned long data)
 468{
 469	struct ath_softc *sc = (struct ath_softc *)data;
 470	struct ath_hw *ah = sc->sc_ah;
 471	struct ath_common *common = ath9k_hw_common(ah);
 472	bool longcal = false;
 473	bool shortcal = false;
 474	bool aniflag = false;
 475	unsigned int timestamp = jiffies_to_msecs(jiffies);
 476	u32 cal_interval, short_cal_interval, long_cal_interval;
 477	unsigned long flags;
 478
 479	if (ah->caldata && ah->caldata->nfcal_interference)
 480		long_cal_interval = ATH_LONG_CALINTERVAL_INT;
 481	else
 482		long_cal_interval = ATH_LONG_CALINTERVAL;
 483
 484	short_cal_interval = (ah->opmode == NL80211_IFTYPE_AP) ?
 485		ATH_AP_SHORT_CALINTERVAL : ATH_STA_SHORT_CALINTERVAL;
 486
 487	/* Only calibrate if awake */
 488	if (sc->sc_ah->power_mode != ATH9K_PM_AWAKE)
 489		goto set_timer;
 490
 491	ath9k_ps_wakeup(sc);
 
 492
 493	/* Long calibration runs independently of short calibration. */
 494	if ((timestamp - common->ani.longcal_timer) >= long_cal_interval) {
 495		longcal = true;
 496		ath_dbg(common, ATH_DBG_ANI, "longcal @%lu\n", jiffies);
 497		common->ani.longcal_timer = timestamp;
 498	}
 499
 500	/* Short calibration applies only while caldone is false */
 501	if (!common->ani.caldone) {
 502		if ((timestamp - common->ani.shortcal_timer) >= short_cal_interval) {
 503			shortcal = true;
 504			ath_dbg(common, ATH_DBG_ANI,
 505				"shortcal @%lu\n", jiffies);
 506			common->ani.shortcal_timer = timestamp;
 507			common->ani.resetcal_timer = timestamp;
 508		}
 509	} else {
 510		if ((timestamp - common->ani.resetcal_timer) >=
 511		    ATH_RESTART_CALINTERVAL) {
 512			common->ani.caldone = ath9k_hw_reset_calvalid(ah);
 513			if (common->ani.caldone)
 514				common->ani.resetcal_timer = timestamp;
 515		}
 516	}
 517
 518	/* Verify whether we must check ANI */
 519	if ((timestamp - common->ani.checkani_timer) >=
 520	     ah->config.ani_poll_interval) {
 521		aniflag = true;
 522		common->ani.checkani_timer = timestamp;
 523	}
 524
 525	/* Call ANI routine if necessary */
 526	if (aniflag) {
 527		spin_lock_irqsave(&common->cc_lock, flags);
 528		ath9k_hw_ani_monitor(ah, ah->curchan);
 529		ath_update_survey_stats(sc);
 530		spin_unlock_irqrestore(&common->cc_lock, flags);
 531	}
 532
 533	/* Perform calibration if necessary */
 534	if (longcal || shortcal) {
 535		common->ani.caldone =
 536			ath9k_hw_calibrate(ah, ah->curchan,
 537						common->rx_chainmask, longcal);
 538	}
 539
 540	ath9k_ps_restore(sc);
 
 
 
 
 541
 542set_timer:
 543	/*
 544	* Set timer interval based on previous results.
 545	* The interval must be the shortest necessary to satisfy ANI,
 546	* short calibration and long calibration.
 547	*/
 548	cal_interval = ATH_LONG_CALINTERVAL;
 549	if (sc->sc_ah->config.enable_ani)
 550		cal_interval = min(cal_interval,
 551				   (u32)ah->config.ani_poll_interval);
 552	if (!common->ani.caldone)
 553		cal_interval = min(cal_interval, (u32)short_cal_interval);
 554
 555	mod_timer(&common->ani.timer, jiffies + msecs_to_jiffies(cal_interval));
 556	if ((sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_PAPRD) && ah->caldata) {
 557		if (!ah->caldata->paprd_done)
 558			ieee80211_queue_work(sc->hw, &sc->paprd_work);
 559		else if (!ah->paprd_table_write_done)
 560			ath_paprd_activate(sc);
 561	}
 562}
 563
 564static void ath_node_attach(struct ath_softc *sc, struct ieee80211_sta *sta)
 
 565{
 566	struct ath_node *an;
 567	struct ath_hw *ah = sc->sc_ah;
 568	an = (struct ath_node *)sta->drv_priv;
 569
 570#ifdef CONFIG_ATH9K_DEBUGFS
 571	spin_lock(&sc->nodes_lock);
 572	list_add(&an->list, &sc->nodes);
 573	spin_unlock(&sc->nodes_lock);
 574	an->sta = sta;
 575#endif
 576	if ((ah->caps.hw_caps) & ATH9K_HW_CAP_APM)
 577		sc->sc_flags |= SC_OP_ENABLE_APM;
 578
 579	if (sc->sc_flags & SC_OP_TXAGGR) {
 580		ath_tx_node_init(sc, an);
 581		an->maxampdu = 1 << (IEEE80211_HT_MAX_AMPDU_FACTOR +
 582				     sta->ht_cap.ampdu_factor);
 583		an->mpdudensity = parse_mpdudensity(sta->ht_cap.ampdu_density);
 584	}
 585}
 586
 587static void ath_node_detach(struct ath_softc *sc, struct ieee80211_sta *sta)
 588{
 589	struct ath_node *an = (struct ath_node *)sta->drv_priv;
 
 590
 591#ifdef CONFIG_ATH9K_DEBUGFS
 592	spin_lock(&sc->nodes_lock);
 593	list_del(&an->list);
 594	spin_unlock(&sc->nodes_lock);
 595	an->sta = NULL;
 596#endif
 597
 598	if (sc->sc_flags & SC_OP_TXAGGR)
 599		ath_tx_node_cleanup(sc, an);
 600}
 601
 602void ath_hw_check(struct work_struct *work)
 603{
 604	struct ath_softc *sc = container_of(work, struct ath_softc, hw_check_work);
 605	struct ath_common *common = ath9k_hw_common(sc->sc_ah);
 
 
 606	unsigned long flags;
 607	int busy;
 
 608
 609	ath9k_ps_wakeup(sc);
 610	if (ath9k_hw_check_alive(sc->sc_ah))
 611		goto out;
 
 612
 613	spin_lock_irqsave(&common->cc_lock, flags);
 614	busy = ath_update_survey_stats(sc);
 615	spin_unlock_irqrestore(&common->cc_lock, flags);
 616
 617	ath_dbg(common, ATH_DBG_RESET, "Possible baseband hang, "
 618		"busy=%d (try %d)\n", busy, sc->hw_busy_count + 1);
 619	if (busy >= 99) {
 620		if (++sc->hw_busy_count >= 3) {
 621			spin_lock_bh(&sc->sc_pcu_lock);
 622			ath_reset(sc, true);
 623			spin_unlock_bh(&sc->sc_pcu_lock);
 624		}
 625	} else if (busy >= 0)
 626		sc->hw_busy_count = 0;
 627
 628out:
 629	ath9k_ps_restore(sc);
 630}
 
 
 
 631
 632static void ath_hw_pll_rx_hang_check(struct ath_softc *sc, u32 pll_sqsum)
 633{
 634	static int count;
 635	struct ath_common *common = ath9k_hw_common(sc->sc_ah);
 636
 637	if (pll_sqsum >= 0x40000) {
 638		count++;
 639		if (count == 3) {
 640			/* Rx is hung for more than 500ms. Reset it */
 641			ath_dbg(common, ATH_DBG_RESET,
 642				"Possible RX hang, resetting");
 643			spin_lock_bh(&sc->sc_pcu_lock);
 644			ath_reset(sc, true);
 645			spin_unlock_bh(&sc->sc_pcu_lock);
 646			count = 0;
 647		}
 648	} else
 649		count = 0;
 650}
 651
 652void ath_hw_pll_work(struct work_struct *work)
 653{
 654	struct ath_softc *sc = container_of(work, struct ath_softc,
 655					    hw_pll_work.work);
 656	u32 pll_sqsum;
 657
 658	if (AR_SREV_9485(sc->sc_ah)) {
 659
 660		ath9k_ps_wakeup(sc);
 661		pll_sqsum = ar9003_get_pll_sqsum_dvc(sc->sc_ah);
 662		ath9k_ps_restore(sc);
 663
 664		ath_hw_pll_rx_hang_check(sc, pll_sqsum);
 665
 666		ieee80211_queue_delayed_work(sc->hw, &sc->hw_pll_work, HZ/5);
 667	}
 668}
 669
 
 
 670
 671void ath9k_tasklet(unsigned long data)
 672{
 673	struct ath_softc *sc = (struct ath_softc *)data;
 674	struct ath_hw *ah = sc->sc_ah;
 675	struct ath_common *common = ath9k_hw_common(ah);
 676
 677	u32 status = sc->intrstatus;
 678	u32 rxmask;
 679
 680	if ((status & ATH9K_INT_FATAL) ||
 681	    (status & ATH9K_INT_BB_WATCHDOG)) {
 682		spin_lock(&sc->sc_pcu_lock);
 683		ath_reset(sc, true);
 684		spin_unlock(&sc->sc_pcu_lock);
 685		return;
 686	}
 687
 688	ath9k_ps_wakeup(sc);
 689	spin_lock(&sc->sc_pcu_lock);
 690
 691	/*
 692	 * Only run the baseband hang check if beacons stop working in AP or
 693	 * IBSS mode, because it has a high false positive rate. For station
 694	 * mode it should not be necessary, since the upper layers will detect
 695	 * this through a beacon miss automatically and the following channel
 696	 * change will trigger a hardware reset anyway
 697	 */
 698	if (ath9k_hw_numtxpending(ah, sc->beacon.beaconq) != 0 &&
 699	    !ath9k_hw_check_alive(ah))
 700		ieee80211_queue_work(sc->hw, &sc->hw_check_work);
 701
 702	if ((status & ATH9K_INT_TSFOOR) && sc->ps_enabled) {
 703		/*
 704		 * TSF sync does not look correct; remain awake to sync with
 705		 * the next Beacon.
 706		 */
 707		ath_dbg(common, ATH_DBG_PS,
 708			"TSFOOR - Sync with next Beacon\n");
 709		sc->ps_flags |= PS_WAIT_FOR_BEACON | PS_BEACON_SYNC |
 710				PS_TSFOOR_SYNC;
 711	}
 
 712
 713	if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)
 714		rxmask = (ATH9K_INT_RXHP | ATH9K_INT_RXLP | ATH9K_INT_RXEOL |
 715			  ATH9K_INT_RXORN);
 716	else
 717		rxmask = (ATH9K_INT_RX | ATH9K_INT_RXEOL | ATH9K_INT_RXORN);
 718
 719	if (status & rxmask) {
 720		/* Check for high priority Rx first */
 721		if ((ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) &&
 722		    (status & ATH9K_INT_RXHP))
 723			ath_rx_tasklet(sc, 0, true);
 724
 725		ath_rx_tasklet(sc, 0, false);
 726	}
 727
 728	if (status & ATH9K_INT_TX) {
 729		if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)
 
 
 
 
 
 
 
 
 730			ath_tx_edma_tasklet(sc);
 731		else
 732			ath_tx_tasklet(sc);
 
 
 
 733	}
 734
 735	if (ah->btcoex_hw.scheme == ATH_BTCOEX_CFG_3WIRE)
 736		if (status & ATH9K_INT_GENTIMER)
 737			ath_gen_timer_isr(sc->sc_ah);
 738
 739	/* re-enable hardware interrupt */
 740	ath9k_hw_enable_interrupts(ah);
 741
 
 
 
 742	spin_unlock(&sc->sc_pcu_lock);
 743	ath9k_ps_restore(sc);
 744}
 745
 746irqreturn_t ath_isr(int irq, void *dev)
 747{
 748#define SCHED_INTR (				\
 749		ATH9K_INT_FATAL |		\
 750		ATH9K_INT_BB_WATCHDOG |		\
 751		ATH9K_INT_RXORN |		\
 752		ATH9K_INT_RXEOL |		\
 753		ATH9K_INT_RX |			\
 754		ATH9K_INT_RXLP |		\
 755		ATH9K_INT_RXHP |		\
 756		ATH9K_INT_TX |			\
 757		ATH9K_INT_BMISS |		\
 758		ATH9K_INT_CST |			\
 
 759		ATH9K_INT_TSFOOR |		\
 760		ATH9K_INT_GENTIMER)
 
 761
 762	struct ath_softc *sc = dev;
 763	struct ath_hw *ah = sc->sc_ah;
 764	struct ath_common *common = ath9k_hw_common(ah);
 765	enum ath9k_int status;
 
 766	bool sched = false;
 767
 768	/*
 769	 * The hardware is not ready/present, don't
 770	 * touch anything. Note this can happen early
 771	 * on if the IRQ is shared.
 772	 */
 773	if (sc->sc_flags & SC_OP_INVALID)
 774		return IRQ_NONE;
 775
 776
 777	/* shared irq, not for us */
 778
 779	if (!ath9k_hw_intrpend(ah))
 780		return IRQ_NONE;
 781
 782	/*
 783	 * Figure out the reason(s) for the interrupt.  Note
 784	 * that the hal returns a pseudo-ISR that may include
 785	 * bits we haven't explicitly enabled so we mask the
 786	 * value to insure we only process bits we requested.
 787	 */
 788	ath9k_hw_getisr(ah, &status);	/* NB: clears ISR too */
 
 789	status &= ah->imask;	/* discard unasked-for bits */
 790
 
 
 
 
 
 791	/*
 792	 * If there are no status bits set, then this interrupt was not
 793	 * for me (should have been caught above).
 794	 */
 795	if (!status)
 796		return IRQ_NONE;
 797
 798	/* Cache the status */
 799	sc->intrstatus = status;
 
 
 800
 801	if (status & SCHED_INTR)
 802		sched = true;
 803
 804	/*
 805	 * If a FATAL or RXORN interrupt is received, we have to reset the
 806	 * chip immediately.
 807	 */
 808	if ((status & ATH9K_INT_FATAL) || ((status & ATH9K_INT_RXORN) &&
 809	    !(ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)))
 810		goto chip_reset;
 811
 812	if ((ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) &&
 813	    (status & ATH9K_INT_BB_WATCHDOG)) {
 814
 815		spin_lock(&common->cc_lock);
 816		ath_hw_cycle_counters_update(common);
 817		ar9003_hw_bb_watchdog_dbg_info(ah);
 818		spin_unlock(&common->cc_lock);
 819
 820		goto chip_reset;
 821	}
 822
 823	if (status & ATH9K_INT_SWBA)
 824		tasklet_schedule(&sc->bcon_tasklet);
 825
 826	if (status & ATH9K_INT_TXURN)
 827		ath9k_hw_updatetxtriglevel(ah, true);
 828
 829	if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) {
 830		if (status & ATH9K_INT_RXEOL) {
 831			ah->imask &= ~(ATH9K_INT_RXEOL | ATH9K_INT_RXORN);
 832			ath9k_hw_set_interrupts(ah, ah->imask);
 833		}
 834	}
 835
 836	if (status & ATH9K_INT_MIB) {
 837		/*
 838		 * Disable interrupts until we service the MIB
 839		 * interrupt; otherwise it will continue to
 840		 * fire.
 841		 */
 842		ath9k_hw_disable_interrupts(ah);
 843		/*
 844		 * Let the hal handle the event. We assume
 845		 * it will clear whatever condition caused
 846		 * the interrupt.
 847		 */
 848		spin_lock(&common->cc_lock);
 849		ath9k_hw_proc_mib_event(ah);
 850		spin_unlock(&common->cc_lock);
 851		ath9k_hw_enable_interrupts(ah);
 852	}
 853
 854	if (!(ah->caps.hw_caps & ATH9K_HW_CAP_AUTOSLEEP))
 855		if (status & ATH9K_INT_TIM_TIMER) {
 856			if (ATH_DBG_WARN_ON_ONCE(sc->ps_idle))
 857				goto chip_reset;
 858			/* Clear RxAbort bit so that we can
 859			 * receive frames */
 860			ath9k_setpower(sc, ATH9K_PM_AWAKE);
 
 861			ath9k_hw_setrxabort(sc->sc_ah, 0);
 862			sc->ps_flags |= PS_WAIT_FOR_BEACON;
 
 863		}
 864
 865chip_reset:
 866
 867	ath_debug_stat_interrupt(sc, status);
 868
 869	if (sched) {
 870		/* turn off every interrupt */
 871		ath9k_hw_disable_interrupts(ah);
 872		tasklet_schedule(&sc->intr_tq);
 873	}
 874
 875	return IRQ_HANDLED;
 876
 877#undef SCHED_INTR
 878}
 879
 880static void ath_radio_enable(struct ath_softc *sc, struct ieee80211_hw *hw)
 
 
 
 
 881{
 882	struct ath_hw *ah = sc->sc_ah;
 883	struct ath_common *common = ath9k_hw_common(ah);
 884	struct ieee80211_channel *channel = hw->conf.channel;
 885	int r;
 886
 887	ath9k_ps_wakeup(sc);
 888	spin_lock_bh(&sc->sc_pcu_lock);
 889
 890	ath9k_hw_configpcipowersave(ah, 0, 0);
 891
 892	if (!ah->curchan)
 893		ah->curchan = ath9k_cmn_get_curchannel(sc->hw, ah);
 894
 895	r = ath9k_hw_reset(ah, ah->curchan, ah->caldata, false);
 896	if (r) {
 897		ath_err(common,
 898			"Unable to reset channel (%u MHz), reset status %d\n",
 899			channel->center_freq, r);
 900	}
 901
 902	ath9k_cmn_update_txpow(ah, sc->curtxpow,
 903			       sc->config.txpowlimit, &sc->curtxpow);
 904	if (ath_startrecv(sc) != 0) {
 905		ath_err(common, "Unable to restart recv logic\n");
 906		goto out;
 907	}
 908	if (sc->sc_flags & SC_OP_BEACONS)
 909		ath_set_beacon(sc);	/* restart beacons */
 910
 911	/* Re-Enable  interrupts */
 912	ath9k_hw_set_interrupts(ah, ah->imask);
 913
 914	/* Enable LED */
 915	ath9k_hw_cfg_output(ah, ah->led_pin,
 916			    AR_GPIO_OUTPUT_MUX_AS_OUTPUT);
 917	ath9k_hw_set_gpio(ah, ah->led_pin, 0);
 918
 919	ieee80211_wake_queues(hw);
 920	ieee80211_queue_delayed_work(hw, &sc->hw_pll_work, HZ/2);
 921
 922out:
 923	spin_unlock_bh(&sc->sc_pcu_lock);
 924
 
 
 925	ath9k_ps_restore(sc);
 
 
 926}
 927
 928void ath_radio_disable(struct ath_softc *sc, struct ieee80211_hw *hw)
 
 
 
 
 
 929{
 930	struct ath_hw *ah = sc->sc_ah;
 931	struct ieee80211_channel *channel = hw->conf.channel;
 932	int r;
 933
 934	ath9k_ps_wakeup(sc);
 935	cancel_delayed_work_sync(&sc->hw_pll_work);
 936
 937	spin_lock_bh(&sc->sc_pcu_lock);
 938
 939	ieee80211_stop_queues(hw);
 940
 941	/*
 942	 * Keep the LED on when the radio is disabled
 943	 * during idle unassociated state.
 944	 */
 945	if (!sc->ps_idle) {
 946		ath9k_hw_set_gpio(ah, ah->led_pin, 1);
 947		ath9k_hw_cfg_gpio_input(ah, ah->led_pin);
 948	}
 949
 950	/* Disable interrupts */
 951	ath9k_hw_disable_interrupts(ah);
 952
 953	ath_drain_all_txq(sc, false);	/* clear pending tx frames */
 954
 955	ath_stoprecv(sc);		/* turn off frame recv */
 956	ath_flushrecv(sc);		/* flush recv queue */
 957
 958	if (!ah->curchan)
 959		ah->curchan = ath9k_cmn_get_curchannel(hw, ah);
 960
 961	r = ath9k_hw_reset(ah, ah->curchan, ah->caldata, false);
 962	if (r) {
 963		ath_err(ath9k_hw_common(sc->sc_ah),
 964			"Unable to reset channel (%u MHz), reset status %d\n",
 965			channel->center_freq, r);
 966	}
 967
 968	ath9k_hw_phy_disable(ah);
 969
 970	ath9k_hw_configpcipowersave(ah, 1, 1);
 971
 972	spin_unlock_bh(&sc->sc_pcu_lock);
 973	ath9k_ps_restore(sc);
 974}
 975
 976int ath_reset(struct ath_softc *sc, bool retry_tx)
 977{
 978	struct ath_hw *ah = sc->sc_ah;
 979	struct ath_common *common = ath9k_hw_common(ah);
 980	struct ieee80211_hw *hw = sc->hw;
 981	int r;
 982
 983	sc->hw_busy_count = 0;
 984
 985	/* Stop ANI */
 986
 987	del_timer_sync(&common->ani.timer);
 988
 989	ath9k_ps_wakeup(sc);
 990
 991	ieee80211_stop_queues(hw);
 992
 993	ath9k_hw_disable_interrupts(ah);
 994	ath_drain_all_txq(sc, retry_tx);
 995
 996	ath_stoprecv(sc);
 997	ath_flushrecv(sc);
 998
 999	r = ath9k_hw_reset(ah, sc->sc_ah->curchan, ah->caldata, false);
1000	if (r)
1001		ath_err(common,
1002			"Unable to reset hardware; reset status %d\n", r);
1003
1004	if (ath_startrecv(sc) != 0)
1005		ath_err(common, "Unable to start recv logic\n");
1006
1007	/*
1008	 * We may be doing a reset in response to a request
1009	 * that changes the channel so update any state that
1010	 * might change as a result.
1011	 */
1012	ath9k_cmn_update_txpow(ah, sc->curtxpow,
1013			       sc->config.txpowlimit, &sc->curtxpow);
1014
1015	if ((sc->sc_flags & SC_OP_BEACONS) || !(sc->sc_flags & (SC_OP_OFFCHANNEL)))
1016		ath_set_beacon(sc);	/* restart beacons */
1017
1018	ath9k_hw_set_interrupts(ah, ah->imask);
1019
1020	if (retry_tx) {
1021		int i;
1022		for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) {
1023			if (ATH_TXQ_SETUP(sc, i)) {
1024				spin_lock_bh(&sc->tx.txq[i].axq_lock);
1025				ath_txq_schedule(sc, &sc->tx.txq[i]);
1026				spin_unlock_bh(&sc->tx.txq[i].axq_lock);
1027			}
1028		}
1029	}
1030
1031	ieee80211_wake_queues(hw);
1032
1033	/* Start ANI */
1034	if (!common->disable_ani)
1035		ath_start_ani(common);
1036
1037	ath9k_ps_restore(sc);
1038
1039	return r;
1040}
1041
1042/**********************/
1043/* mac80211 callbacks */
1044/**********************/
1045
1046static int ath9k_start(struct ieee80211_hw *hw)
1047{
1048	struct ath_softc *sc = hw->priv;
1049	struct ath_hw *ah = sc->sc_ah;
1050	struct ath_common *common = ath9k_hw_common(ah);
1051	struct ieee80211_channel *curchan = hw->conf.channel;
 
1052	struct ath9k_channel *init_channel;
1053	int r;
1054
1055	ath_dbg(common, ATH_DBG_CONFIG,
1056		"Starting driver with initial channel: %d MHz\n",
1057		curchan->center_freq);
1058
1059	ath9k_ps_wakeup(sc);
1060
1061	mutex_lock(&sc->mutex);
1062
1063	/* setup initial channel */
1064	sc->chan_idx = curchan->hw_value;
1065
1066	init_channel = ath9k_cmn_get_curchannel(hw, ah);
1067
1068	/* Reset SERDES registers */
1069	ath9k_hw_configpcipowersave(ah, 0, 0);
1070
1071	/*
1072	 * The basic interface to setting the hardware in a good
1073	 * state is ``reset''.  On return the hardware is known to
1074	 * be powered up and with interrupts disabled.  This must
1075	 * be followed by initialization of the appropriate bits
1076	 * and then setup of the interrupt mask.
1077	 */
1078	spin_lock_bh(&sc->sc_pcu_lock);
 
 
 
1079	r = ath9k_hw_reset(ah, init_channel, ah->caldata, false);
1080	if (r) {
1081		ath_err(common,
1082			"Unable to reset hardware; reset status %d (freq %u MHz)\n",
1083			r, curchan->center_freq);
1084		spin_unlock_bh(&sc->sc_pcu_lock);
1085		goto mutex_unlock;
1086	}
1087
1088	/*
1089	 * This is needed only to setup initial state
1090	 * but it's best done after a reset.
1091	 */
1092	ath9k_cmn_update_txpow(ah, sc->curtxpow,
1093			sc->config.txpowlimit, &sc->curtxpow);
1094
1095	/*
1096	 * Setup the hardware after reset:
1097	 * The receive engine is set going.
1098	 * Frame transmit is handled entirely
1099	 * in the frame output path; there's nothing to do
1100	 * here except setup the interrupt mask.
1101	 */
1102	if (ath_startrecv(sc) != 0) {
1103		ath_err(common, "Unable to start recv logic\n");
1104		r = -EIO;
1105		spin_unlock_bh(&sc->sc_pcu_lock);
1106		goto mutex_unlock;
1107	}
1108	spin_unlock_bh(&sc->sc_pcu_lock);
1109
1110	/* Setup our intr mask. */
1111	ah->imask = ATH9K_INT_TX | ATH9K_INT_RXEOL |
1112		    ATH9K_INT_RXORN | ATH9K_INT_FATAL |
1113		    ATH9K_INT_GLOBAL;
1114
1115	if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)
1116		ah->imask |= ATH9K_INT_RXHP |
1117			     ATH9K_INT_RXLP |
1118			     ATH9K_INT_BB_WATCHDOG;
1119	else
1120		ah->imask |= ATH9K_INT_RX;
1121
1122	ah->imask |= ATH9K_INT_GTT;
 
 
 
 
 
 
 
 
1123
1124	if (ah->caps.hw_caps & ATH9K_HW_CAP_HT)
1125		ah->imask |= ATH9K_INT_CST;
1126
1127	sc->sc_flags &= ~SC_OP_INVALID;
 
 
1128	sc->sc_ah->is_monitoring = false;
1129
1130	/* Disable BMISS interrupt when we're not associated */
1131	ah->imask &= ~(ATH9K_INT_SWBA | ATH9K_INT_BMISS);
1132	ath9k_hw_set_interrupts(ah, ah->imask);
1133
1134	ieee80211_wake_queues(hw);
 
 
 
 
 
1135
1136	ieee80211_queue_delayed_work(sc->hw, &sc->tx_complete_work, 0);
 
 
 
 
1137
1138	if ((ah->btcoex_hw.scheme != ATH_BTCOEX_CFG_NONE) &&
1139	    !ah->btcoex_hw.enabled) {
1140		ath9k_hw_btcoex_set_weight(ah, AR_BT_COEX_WGHT,
1141					   AR_STOMP_LOW_WLAN_WGHT);
1142		ath9k_hw_btcoex_enable(ah);
1143
1144		if (common->bus_ops->bt_coex_prep)
1145			common->bus_ops->bt_coex_prep(common);
1146		if (ah->btcoex_hw.scheme == ATH_BTCOEX_CFG_3WIRE)
1147			ath9k_btcoex_timer_resume(sc);
1148	}
1149
1150	if (ah->caps.pcie_lcr_extsync_en && common->bus_ops->extn_synch_en)
1151		common->bus_ops->extn_synch_en(common);
1152
1153mutex_unlock:
1154	mutex_unlock(&sc->mutex);
1155
1156	ath9k_ps_restore(sc);
1157
1158	return r;
1159}
1160
1161static void ath9k_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
 
 
1162{
1163	struct ath_softc *sc = hw->priv;
1164	struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1165	struct ath_tx_control txctl;
1166	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
 
1167
1168	if (sc->ps_enabled) {
1169		/*
1170		 * mac80211 does not set PM field for normal data frames, so we
1171		 * need to update that based on the current PS mode.
1172		 */
1173		if (ieee80211_is_data(hdr->frame_control) &&
1174		    !ieee80211_is_nullfunc(hdr->frame_control) &&
1175		    !ieee80211_has_pm(hdr->frame_control)) {
1176			ath_dbg(common, ATH_DBG_PS,
1177				"Add PM=1 for a TX frame while in PS mode\n");
1178			hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
1179		}
1180	}
1181
1182	if (unlikely(sc->sc_ah->power_mode != ATH9K_PM_AWAKE)) {
1183		/*
1184		 * We are using PS-Poll and mac80211 can request TX while in
1185		 * power save mode. Need to wake up hardware for the TX to be
1186		 * completed and if needed, also for RX of buffered frames.
1187		 */
1188		ath9k_ps_wakeup(sc);
 
1189		if (!(sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_AUTOSLEEP))
1190			ath9k_hw_setrxabort(sc->sc_ah, 0);
1191		if (ieee80211_is_pspoll(hdr->frame_control)) {
1192			ath_dbg(common, ATH_DBG_PS,
1193				"Sending PS-Poll to pick a buffered frame\n");
1194			sc->ps_flags |= PS_WAIT_FOR_PSPOLL_DATA;
1195		} else {
1196			ath_dbg(common, ATH_DBG_PS,
1197				"Wake up to complete TX\n");
1198			sc->ps_flags |= PS_WAIT_FOR_TX_ACK;
1199		}
1200		/*
1201		 * The actual restore operation will happen only after
1202		 * the sc_flags bit is cleared. We are just dropping
1203		 * the ps_usecount here.
1204		 */
 
1205		ath9k_ps_restore(sc);
1206	}
1207
 
 
 
 
 
 
 
 
 
1208	memset(&txctl, 0, sizeof(struct ath_tx_control));
1209	txctl.txq = sc->tx.txq_map[skb_get_queue_mapping(skb)];
 
1210
1211	ath_dbg(common, ATH_DBG_XMIT, "transmitting packet, skb: %p\n", skb);
1212
1213	if (ath_tx_start(hw, skb, &txctl) != 0) {
1214		ath_dbg(common, ATH_DBG_XMIT, "TX failed\n");
 
1215		goto exit;
1216	}
1217
1218	return;
1219exit:
1220	dev_kfree_skb_any(skb);
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1221}
1222
1223static void ath9k_stop(struct ieee80211_hw *hw)
1224{
1225	struct ath_softc *sc = hw->priv;
1226	struct ath_hw *ah = sc->sc_ah;
1227	struct ath_common *common = ath9k_hw_common(ah);
 
 
 
 
1228
1229	mutex_lock(&sc->mutex);
1230
1231	cancel_delayed_work_sync(&sc->tx_complete_work);
1232	cancel_delayed_work_sync(&sc->hw_pll_work);
1233	cancel_work_sync(&sc->paprd_work);
1234	cancel_work_sync(&sc->hw_check_work);
1235
1236	if (sc->sc_flags & SC_OP_INVALID) {
1237		ath_dbg(common, ATH_DBG_ANY, "Device not present\n");
 
 
1238		mutex_unlock(&sc->mutex);
1239		return;
1240	}
1241
1242	/* Ensure HW is awake when we try to shut it down. */
1243	ath9k_ps_wakeup(sc);
1244
1245	if (ah->btcoex_hw.enabled) {
1246		ath9k_hw_btcoex_disable(ah);
1247		if (ah->btcoex_hw.scheme == ATH_BTCOEX_CFG_3WIRE)
1248			ath9k_btcoex_timer_pause(sc);
1249	}
1250
1251	spin_lock_bh(&sc->sc_pcu_lock);
1252
1253	/* prevent tasklets to enable interrupts once we disable them */
1254	ah->imask &= ~ATH9K_INT_GLOBAL;
1255
1256	/* make sure h/w will not generate any interrupt
1257	 * before setting the invalid flag. */
1258	ath9k_hw_disable_interrupts(ah);
1259
1260	if (!(sc->sc_flags & SC_OP_INVALID)) {
1261		ath_drain_all_txq(sc, false);
1262		ath_stoprecv(sc);
1263		ath9k_hw_phy_disable(ah);
1264	} else
1265		sc->rx.rxlink = NULL;
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1266
1267	if (sc->rx.frag) {
1268		dev_kfree_skb_any(sc->rx.frag);
1269		sc->rx.frag = NULL;
1270	}
1271
1272	/* disable HAL and put h/w to sleep */
1273	ath9k_hw_disable(ah);
 
 
 
 
 
 
 
 
 
1274
1275	spin_unlock_bh(&sc->sc_pcu_lock);
1276
1277	/* we can now sync irq and kill any running tasklets, since we already
1278	 * disabled interrupts and not holding a spin lock */
1279	synchronize_irq(sc->irq);
1280	tasklet_kill(&sc->intr_tq);
1281	tasklet_kill(&sc->bcon_tasklet);
1282
1283	ath9k_ps_restore(sc);
 
 
 
1284
1285	sc->ps_idle = true;
1286	ath_radio_disable(sc, hw);
1287
1288	sc->sc_flags |= SC_OP_INVALID;
1289
1290	mutex_unlock(&sc->mutex);
1291
1292	ath_dbg(common, ATH_DBG_CONFIG, "Driver halt\n");
1293}
1294
1295bool ath9k_uses_beacons(int type)
1296{
1297	switch (type) {
1298	case NL80211_IFTYPE_AP:
1299	case NL80211_IFTYPE_ADHOC:
1300	case NL80211_IFTYPE_MESH_POINT:
1301		return true;
1302	default:
1303		return false;
1304	}
1305}
1306
1307static void ath9k_reclaim_beacon(struct ath_softc *sc,
1308				 struct ieee80211_vif *vif)
1309{
1310	struct ath_vif *avp = (void *)vif->drv_priv;
 
 
 
 
 
 
 
1311
1312	ath9k_set_beaconing_status(sc, false);
1313	ath_beacon_return(sc, avp);
1314	ath9k_set_beaconing_status(sc, true);
1315	sc->sc_flags &= ~SC_OP_BEACONS;
1316}
1317
1318static void ath9k_vif_iter(void *data, u8 *mac, struct ieee80211_vif *vif)
 
1319{
1320	struct ath9k_vif_iter_data *iter_data = data;
1321	int i;
1322
1323	if (iter_data->hw_macaddr)
1324		for (i = 0; i < ETH_ALEN; i++)
1325			iter_data->mask[i] &=
1326				~(iter_data->hw_macaddr[i] ^ mac[i]);
 
 
 
 
 
 
 
1327
1328	switch (vif->type) {
1329	case NL80211_IFTYPE_AP:
1330		iter_data->naps++;
 
 
1331		break;
1332	case NL80211_IFTYPE_STATION:
1333		iter_data->nstations++;
 
 
 
 
 
1334		break;
1335	case NL80211_IFTYPE_ADHOC:
1336		iter_data->nadhocs++;
 
 
1337		break;
1338	case NL80211_IFTYPE_MESH_POINT:
1339		iter_data->nmeshes++;
1340		break;
1341	case NL80211_IFTYPE_WDS:
1342		iter_data->nwds++;
1343		break;
1344	default:
1345		iter_data->nothers++;
1346		break;
1347	}
1348}
1349
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1350/* Called with sc->mutex held. */
1351void ath9k_calculate_iter_data(struct ieee80211_hw *hw,
1352			       struct ieee80211_vif *vif,
1353			       struct ath9k_vif_iter_data *iter_data)
1354{
1355	struct ath_softc *sc = hw->priv;
1356	struct ath_hw *ah = sc->sc_ah;
1357	struct ath_common *common = ath9k_hw_common(ah);
1358
1359	/*
1360	 * Use the hardware MAC address as reference, the hardware uses it
1361	 * together with the BSSID mask when matching addresses.
1362	 */
1363	memset(iter_data, 0, sizeof(*iter_data));
1364	iter_data->hw_macaddr = common->macaddr;
1365	memset(&iter_data->mask, 0xff, ETH_ALEN);
1366
1367	if (vif)
1368		ath9k_vif_iter(iter_data, vif->addr, vif);
1369
1370	/* Get list of all active MAC addresses */
1371	ieee80211_iterate_active_interfaces_atomic(sc->hw, ath9k_vif_iter,
1372						   iter_data);
1373}
1374
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1375/* Called with sc->mutex held. */
1376static void ath9k_calculate_summary_state(struct ieee80211_hw *hw,
1377					  struct ieee80211_vif *vif)
1378{
1379	struct ath_softc *sc = hw->priv;
1380	struct ath_hw *ah = sc->sc_ah;
1381	struct ath_common *common = ath9k_hw_common(ah);
1382	struct ath9k_vif_iter_data iter_data;
1383
1384	ath9k_calculate_iter_data(hw, vif, &iter_data);
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1385
1386	/* Set BSSID mask. */
1387	memcpy(common->bssidmask, iter_data.mask, ETH_ALEN);
1388	ath_hw_setbssidmask(common);
1389
1390	/* Set op-mode & TSF */
1391	if (iter_data.naps > 0) {
1392		ath9k_hw_set_tsfadjust(ah, 1);
1393		sc->sc_flags |= SC_OP_TSF_RESET;
1394		ah->opmode = NL80211_IFTYPE_AP;
1395	} else {
1396		ath9k_hw_set_tsfadjust(ah, 0);
1397		sc->sc_flags &= ~SC_OP_TSF_RESET;
 
1398
1399		if (iter_data.nmeshes)
1400			ah->opmode = NL80211_IFTYPE_MESH_POINT;
1401		else if (iter_data.nwds)
1402			ah->opmode = NL80211_IFTYPE_AP;
1403		else if (iter_data.nadhocs)
1404			ah->opmode = NL80211_IFTYPE_ADHOC;
1405		else
1406			ah->opmode = NL80211_IFTYPE_STATION;
1407	}
1408
1409	/*
1410	 * Enable MIB interrupts when there are hardware phy counters.
1411	 */
1412	if ((iter_data.nstations + iter_data.nadhocs + iter_data.nmeshes) > 0) {
1413		if (ah->config.enable_ani)
1414			ah->imask |= ATH9K_INT_MIB;
1415		ah->imask |= ATH9K_INT_TSFOOR;
1416	} else {
1417		ah->imask &= ~ATH9K_INT_MIB;
1418		ah->imask &= ~ATH9K_INT_TSFOOR;
 
 
1419	}
1420
1421	ath9k_hw_set_interrupts(ah, ah->imask);
 
1422
1423	/* Set up ANI */
1424	if (iter_data.naps > 0) {
1425		sc->sc_ah->stats.avgbrssi = ATH_RSSI_DUMMY_MARKER;
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1426
1427		if (!common->disable_ani) {
1428			sc->sc_flags |= SC_OP_ANI_RUN;
1429			ath_start_ani(common);
1430		}
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1431
 
 
 
 
 
 
 
 
1432	} else {
1433		sc->sc_flags &= ~SC_OP_ANI_RUN;
1434		del_timer_sync(&common->ani.timer);
1435	}
 
 
 
 
1436}
1437
1438/* Called with sc->mutex held, vif counts set up properly. */
1439static void ath9k_do_vif_add_setup(struct ieee80211_hw *hw,
1440				   struct ieee80211_vif *vif)
1441{
1442	struct ath_softc *sc = hw->priv;
1443
1444	ath9k_calculate_summary_state(hw, vif);
 
1445
1446	if (ath9k_uses_beacons(vif->type)) {
1447		int error;
1448		/* This may fail because upper levels do not have beacons
1449		 * properly configured yet.  That's OK, we assume it
1450		 * will be properly configured and then we will be notified
1451		 * in the info_changed method and set up beacons properly
1452		 * there.
1453		 */
1454		ath9k_set_beaconing_status(sc, false);
1455		error = ath_beacon_alloc(sc, vif);
1456		if (!error)
1457			ath_beacon_config(sc, vif);
1458		ath9k_set_beaconing_status(sc, true);
1459	}
1460}
1461
 
 
 
 
 
 
1462
1463static int ath9k_add_interface(struct ieee80211_hw *hw,
1464			       struct ieee80211_vif *vif)
1465{
1466	struct ath_softc *sc = hw->priv;
1467	struct ath_hw *ah = sc->sc_ah;
1468	struct ath_common *common = ath9k_hw_common(ah);
1469	int ret = 0;
 
1470
1471	ath9k_ps_wakeup(sc);
1472	mutex_lock(&sc->mutex);
1473
1474	switch (vif->type) {
1475	case NL80211_IFTYPE_STATION:
1476	case NL80211_IFTYPE_WDS:
1477	case NL80211_IFTYPE_ADHOC:
1478	case NL80211_IFTYPE_AP:
1479	case NL80211_IFTYPE_MESH_POINT:
1480		break;
1481	default:
1482		ath_err(common, "Interface type %d not yet supported\n",
1483			vif->type);
1484		ret = -EOPNOTSUPP;
1485		goto out;
1486	}
1487
1488	if (ath9k_uses_beacons(vif->type)) {
1489		if (sc->nbcnvifs >= ATH_BCBUF) {
1490			ath_err(common, "Not enough beacon buffers when adding"
1491				" new interface of type: %i\n",
1492				vif->type);
1493			ret = -ENOBUFS;
1494			goto out;
1495		}
 
1496	}
1497
1498	if ((ah->opmode == NL80211_IFTYPE_ADHOC) ||
1499	    ((vif->type == NL80211_IFTYPE_ADHOC) &&
1500	     sc->nvifs > 0)) {
1501		ath_err(common, "Cannot create ADHOC interface when other"
1502			" interfaces already exist.\n");
1503		ret = -EINVAL;
1504		goto out;
 
 
 
 
 
 
1505	}
1506
1507	ath_dbg(common, ATH_DBG_CONFIG,
1508		"Attach a VIF of type: %d\n", vif->type);
1509
1510	sc->nvifs++;
 
 
 
 
 
 
 
 
1511
1512	ath9k_do_vif_add_setup(hw, vif);
1513out:
1514	mutex_unlock(&sc->mutex);
1515	ath9k_ps_restore(sc);
1516	return ret;
1517}
1518
1519static int ath9k_change_interface(struct ieee80211_hw *hw,
1520				  struct ieee80211_vif *vif,
1521				  enum nl80211_iftype new_type,
1522				  bool p2p)
1523{
1524	struct ath_softc *sc = hw->priv;
1525	struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1526	int ret = 0;
1527
1528	ath_dbg(common, ATH_DBG_CONFIG, "Change Interface\n");
1529	mutex_lock(&sc->mutex);
1530	ath9k_ps_wakeup(sc);
1531
1532	/* See if new interface type is valid. */
1533	if ((new_type == NL80211_IFTYPE_ADHOC) &&
1534	    (sc->nvifs > 1)) {
1535		ath_err(common, "When using ADHOC, it must be the only"
1536			" interface.\n");
1537		ret = -EINVAL;
1538		goto out;
1539	}
1540
1541	if (ath9k_uses_beacons(new_type) &&
1542	    !ath9k_uses_beacons(vif->type)) {
1543		if (sc->nbcnvifs >= ATH_BCBUF) {
1544			ath_err(common, "No beacon slot available\n");
1545			ret = -ENOBUFS;
1546			goto out;
1547		}
1548	}
1549
1550	/* Clean up old vif stuff */
1551	if (ath9k_uses_beacons(vif->type))
1552		ath9k_reclaim_beacon(sc, vif);
1553
1554	/* Add new settings */
1555	vif->type = new_type;
1556	vif->p2p = p2p;
1557
1558	ath9k_do_vif_add_setup(hw, vif);
1559out:
1560	ath9k_ps_restore(sc);
 
 
 
 
 
1561	mutex_unlock(&sc->mutex);
1562	return ret;
1563}
1564
1565static void ath9k_remove_interface(struct ieee80211_hw *hw,
1566				   struct ieee80211_vif *vif)
1567{
1568	struct ath_softc *sc = hw->priv;
1569	struct ath_common *common = ath9k_hw_common(sc->sc_ah);
 
1570
1571	ath_dbg(common, ATH_DBG_CONFIG, "Detach Interface\n");
1572
1573	ath9k_ps_wakeup(sc);
1574	mutex_lock(&sc->mutex);
1575
1576	sc->nvifs--;
 
 
 
 
 
1577
1578	/* Reclaim beacon resources */
1579	if (ath9k_uses_beacons(vif->type))
1580		ath9k_reclaim_beacon(sc, vif);
1581
1582	ath9k_calculate_summary_state(hw, NULL);
 
 
 
 
1583
1584	mutex_unlock(&sc->mutex);
1585	ath9k_ps_restore(sc);
1586}
1587
1588static void ath9k_enable_ps(struct ath_softc *sc)
1589{
1590	struct ath_hw *ah = sc->sc_ah;
 
 
 
 
1591
1592	sc->ps_enabled = true;
1593	if (!(ah->caps.hw_caps & ATH9K_HW_CAP_AUTOSLEEP)) {
1594		if ((ah->imask & ATH9K_INT_TIM_TIMER) == 0) {
1595			ah->imask |= ATH9K_INT_TIM_TIMER;
1596			ath9k_hw_set_interrupts(ah, ah->imask);
1597		}
1598		ath9k_hw_setrxabort(ah, 1);
1599	}
 
1600}
1601
1602static void ath9k_disable_ps(struct ath_softc *sc)
1603{
1604	struct ath_hw *ah = sc->sc_ah;
 
 
 
 
1605
1606	sc->ps_enabled = false;
1607	ath9k_hw_setpower(ah, ATH9K_PM_AWAKE);
1608	if (!(ah->caps.hw_caps & ATH9K_HW_CAP_AUTOSLEEP)) {
1609		ath9k_hw_setrxabort(ah, 0);
1610		sc->ps_flags &= ~(PS_WAIT_FOR_BEACON |
1611				  PS_WAIT_FOR_CAB |
1612				  PS_WAIT_FOR_PSPOLL_DATA |
1613				  PS_WAIT_FOR_TX_ACK);
1614		if (ah->imask & ATH9K_INT_TIM_TIMER) {
1615			ah->imask &= ~ATH9K_INT_TIM_TIMER;
1616			ath9k_hw_set_interrupts(ah, ah->imask);
1617		}
1618	}
1619
1620}
1621
1622static int ath9k_config(struct ieee80211_hw *hw, u32 changed)
1623{
1624	struct ath_softc *sc = hw->priv;
1625	struct ath_hw *ah = sc->sc_ah;
1626	struct ath_common *common = ath9k_hw_common(ah);
1627	struct ieee80211_conf *conf = &hw->conf;
1628	bool disable_radio = false;
1629
 
1630	mutex_lock(&sc->mutex);
1631
1632	/*
1633	 * Leave this as the first check because we need to turn on the
1634	 * radio if it was disabled before prior to processing the rest
1635	 * of the changes. Likewise we must only disable the radio towards
1636	 * the end.
1637	 */
1638	if (changed & IEEE80211_CONF_CHANGE_IDLE) {
1639		sc->ps_idle = !!(conf->flags & IEEE80211_CONF_IDLE);
1640		if (!sc->ps_idle) {
1641			ath_radio_enable(sc, hw);
1642			ath_dbg(common, ATH_DBG_CONFIG,
1643				"not-idle: enabling radio\n");
1644		} else {
1645			disable_radio = true;
 
 
 
 
 
1646		}
1647	}
1648
1649	/*
1650	 * We just prepare to enable PS. We have to wait until our AP has
1651	 * ACK'd our null data frame to disable RX otherwise we'll ignore
1652	 * those ACKs and end up retransmitting the same null data frames.
1653	 * IEEE80211_CONF_CHANGE_PS is only passed by mac80211 for STA mode.
1654	 */
1655	if (changed & IEEE80211_CONF_CHANGE_PS) {
1656		unsigned long flags;
1657		spin_lock_irqsave(&sc->sc_pm_lock, flags);
1658		if (conf->flags & IEEE80211_CONF_PS)
1659			ath9k_enable_ps(sc);
1660		else
1661			ath9k_disable_ps(sc);
1662		spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
1663	}
1664
1665	if (changed & IEEE80211_CONF_CHANGE_MONITOR) {
1666		if (conf->flags & IEEE80211_CONF_MONITOR) {
1667			ath_dbg(common, ATH_DBG_CONFIG,
1668				"Monitor mode is enabled\n");
1669			sc->sc_ah->is_monitoring = true;
1670		} else {
1671			ath_dbg(common, ATH_DBG_CONFIG,
1672				"Monitor mode is disabled\n");
1673			sc->sc_ah->is_monitoring = false;
1674		}
1675	}
1676
1677	if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
1678		struct ieee80211_channel *curchan = hw->conf.channel;
1679		int pos = curchan->hw_value;
1680		int old_pos = -1;
1681		unsigned long flags;
1682
1683		if (ah->curchan)
1684			old_pos = ah->curchan - &ah->channels[0];
1685
1686		if (hw->conf.flags & IEEE80211_CONF_OFFCHANNEL)
1687			sc->sc_flags |= SC_OP_OFFCHANNEL;
1688		else
1689			sc->sc_flags &= ~SC_OP_OFFCHANNEL;
1690
1691		ath_dbg(common, ATH_DBG_CONFIG,
1692			"Set channel: %d MHz type: %d\n",
1693			curchan->center_freq, conf->channel_type);
1694
1695		ath9k_cmn_update_ichannel(&sc->sc_ah->channels[pos],
1696					  curchan, conf->channel_type);
1697
1698		/* update survey stats for the old channel before switching */
1699		spin_lock_irqsave(&common->cc_lock, flags);
1700		ath_update_survey_stats(sc);
1701		spin_unlock_irqrestore(&common->cc_lock, flags);
1702
1703		/*
1704		 * If the operating channel changes, change the survey in-use flags
1705		 * along with it.
1706		 * Reset the survey data for the new channel, unless we're switching
1707		 * back to the operating channel from an off-channel operation.
1708		 */
1709		if (!(hw->conf.flags & IEEE80211_CONF_OFFCHANNEL) &&
1710		    sc->cur_survey != &sc->survey[pos]) {
1711
1712			if (sc->cur_survey)
1713				sc->cur_survey->filled &= ~SURVEY_INFO_IN_USE;
1714
1715			sc->cur_survey = &sc->survey[pos];
1716
1717			memset(sc->cur_survey, 0, sizeof(struct survey_info));
1718			sc->cur_survey->filled |= SURVEY_INFO_IN_USE;
1719		} else if (!(sc->survey[pos].filled & SURVEY_INFO_IN_USE)) {
1720			memset(&sc->survey[pos], 0, sizeof(struct survey_info));
1721		}
1722
1723		if (ath_set_channel(sc, hw, &sc->sc_ah->channels[pos]) < 0) {
1724			ath_err(common, "Unable to set channel\n");
1725			mutex_unlock(&sc->mutex);
1726			return -EINVAL;
1727		}
1728
1729		/*
1730		 * The most recent snapshot of channel->noisefloor for the old
1731		 * channel is only available after the hardware reset. Copy it to
1732		 * the survey stats now.
1733		 */
1734		if (old_pos >= 0)
1735			ath_update_survey_nf(sc, old_pos);
1736	}
1737
1738	if (changed & IEEE80211_CONF_CHANGE_POWER) {
1739		ath_dbg(common, ATH_DBG_CONFIG,
1740			"Set power: %d\n", conf->power_level);
1741		sc->config.txpowlimit = 2 * conf->power_level;
1742		ath9k_ps_wakeup(sc);
1743		ath9k_cmn_update_txpow(ah, sc->curtxpow,
1744				       sc->config.txpowlimit, &sc->curtxpow);
1745		ath9k_ps_restore(sc);
1746	}
1747
1748	if (disable_radio) {
1749		ath_dbg(common, ATH_DBG_CONFIG, "idle: disabling radio\n");
1750		ath_radio_disable(sc, hw);
1751	}
1752
1753	mutex_unlock(&sc->mutex);
 
1754
1755	return 0;
1756}
1757
1758#define SUPPORTED_FILTERS			\
1759	(FIF_PROMISC_IN_BSS |			\
1760	FIF_ALLMULTI |				\
1761	FIF_CONTROL |				\
1762	FIF_PSPOLL |				\
1763	FIF_OTHER_BSS |				\
1764	FIF_BCN_PRBRESP_PROMISC |		\
1765	FIF_PROBE_REQ |				\
 
1766	FIF_FCSFAIL)
1767
1768/* FIXME: sc->sc_full_reset ? */
1769static void ath9k_configure_filter(struct ieee80211_hw *hw,
1770				   unsigned int changed_flags,
1771				   unsigned int *total_flags,
1772				   u64 multicast)
1773{
1774	struct ath_softc *sc = hw->priv;
 
1775	u32 rfilt;
1776
1777	changed_flags &= SUPPORTED_FILTERS;
1778	*total_flags &= SUPPORTED_FILTERS;
1779
1780	sc->rx.rxfilter = *total_flags;
 
 
 
 
 
 
 
1781	ath9k_ps_wakeup(sc);
1782	rfilt = ath_calcrxfilter(sc);
1783	ath9k_hw_setrxfilter(sc->sc_ah, rfilt);
1784	ath9k_ps_restore(sc);
1785
1786	ath_dbg(ath9k_hw_common(sc->sc_ah), ATH_DBG_CONFIG,
1787		"Set HW RX filter: 0x%x\n", rfilt);
1788}
1789
1790static int ath9k_sta_add(struct ieee80211_hw *hw,
1791			 struct ieee80211_vif *vif,
1792			 struct ieee80211_sta *sta)
1793{
1794	struct ath_softc *sc = hw->priv;
1795	struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1796	struct ath_node *an = (struct ath_node *) sta->drv_priv;
1797	struct ieee80211_key_conf ps_key = { };
 
1798
1799	ath_node_attach(sc, sta);
1800
1801	if (vif->type != NL80211_IFTYPE_AP &&
1802	    vif->type != NL80211_IFTYPE_AP_VLAN)
1803		return 0;
1804
1805	an->ps_key = ath_key_config(common, vif, sta, &ps_key);
 
 
 
 
1806
1807	return 0;
1808}
1809
1810static void ath9k_del_ps_key(struct ath_softc *sc,
1811			     struct ieee80211_vif *vif,
1812			     struct ieee80211_sta *sta)
1813{
1814	struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1815	struct ath_node *an = (struct ath_node *) sta->drv_priv;
1816	struct ieee80211_key_conf ps_key = { .hw_key_idx = an->ps_key };
1817
1818	if (!an->ps_key)
1819	    return;
1820
1821	ath_key_delete(common, &ps_key);
 
 
1822}
1823
1824static int ath9k_sta_remove(struct ieee80211_hw *hw,
1825			    struct ieee80211_vif *vif,
1826			    struct ieee80211_sta *sta)
1827{
1828	struct ath_softc *sc = hw->priv;
1829
1830	ath9k_del_ps_key(sc, vif, sta);
1831	ath_node_detach(sc, sta);
1832
1833	return 0;
1834}
1835
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1836static void ath9k_sta_notify(struct ieee80211_hw *hw,
1837			 struct ieee80211_vif *vif,
1838			 enum sta_notify_cmd cmd,
1839			 struct ieee80211_sta *sta)
1840{
1841	struct ath_softc *sc = hw->priv;
1842	struct ath_node *an = (struct ath_node *) sta->drv_priv;
1843
1844	switch (cmd) {
1845	case STA_NOTIFY_SLEEP:
1846		an->sleeping = true;
1847		if (ath_tx_aggr_sleep(sc, an))
1848			ieee80211_sta_set_tim(sta);
1849		break;
1850	case STA_NOTIFY_AWAKE:
 
1851		an->sleeping = false;
1852		ath_tx_aggr_wakeup(sc, an);
1853		break;
1854	}
1855}
1856
1857static int ath9k_conf_tx(struct ieee80211_hw *hw, u16 queue,
 
 
1858			 const struct ieee80211_tx_queue_params *params)
1859{
1860	struct ath_softc *sc = hw->priv;
1861	struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1862	struct ath_txq *txq;
1863	struct ath9k_tx_queue_info qi;
1864	int ret = 0;
1865
1866	if (queue >= WME_NUM_AC)
1867		return 0;
1868
1869	txq = sc->tx.txq_map[queue];
1870
1871	ath9k_ps_wakeup(sc);
1872	mutex_lock(&sc->mutex);
1873
1874	memset(&qi, 0, sizeof(struct ath9k_tx_queue_info));
1875
1876	qi.tqi_aifs = params->aifs;
1877	qi.tqi_cwmin = params->cw_min;
1878	qi.tqi_cwmax = params->cw_max;
1879	qi.tqi_burstTime = params->txop;
1880
1881	ath_dbg(common, ATH_DBG_CONFIG,
1882		"Configure tx [queue/halq] [%d/%d], aifs: %d, cw_min: %d, cw_max: %d, txop: %d\n",
1883		queue, txq->axq_qnum, params->aifs, params->cw_min,
1884		params->cw_max, params->txop);
1885
 
1886	ret = ath_txq_update(sc, txq->axq_qnum, &qi);
1887	if (ret)
1888		ath_err(common, "TXQ Update failed\n");
1889
1890	if (sc->sc_ah->opmode == NL80211_IFTYPE_ADHOC)
1891		if (queue == WME_AC_BE && !ret)
1892			ath_beaconq_config(sc);
1893
1894	mutex_unlock(&sc->mutex);
1895	ath9k_ps_restore(sc);
1896
1897	return ret;
1898}
1899
1900static int ath9k_set_key(struct ieee80211_hw *hw,
1901			 enum set_key_cmd cmd,
1902			 struct ieee80211_vif *vif,
1903			 struct ieee80211_sta *sta,
1904			 struct ieee80211_key_conf *key)
1905{
1906	struct ath_softc *sc = hw->priv;
1907	struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1908	int ret = 0;
 
1909
1910	if (ath9k_modparam_nohwcrypt)
1911		return -ENOSPC;
1912
1913	if (vif->type == NL80211_IFTYPE_ADHOC &&
 
1914	    (key->cipher == WLAN_CIPHER_SUITE_TKIP ||
1915	     key->cipher == WLAN_CIPHER_SUITE_CCMP) &&
1916	    !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) {
1917		/*
1918		 * For now, disable hw crypto for the RSN IBSS group keys. This
1919		 * could be optimized in the future to use a modified key cache
1920		 * design to support per-STA RX GTK, but until that gets
1921		 * implemented, use of software crypto for group addressed
1922		 * frames is a acceptable to allow RSN IBSS to be used.
1923		 */
1924		return -EOPNOTSUPP;
1925	}
1926
 
 
 
 
 
 
 
 
 
1927	mutex_lock(&sc->mutex);
1928	ath9k_ps_wakeup(sc);
1929	ath_dbg(common, ATH_DBG_CONFIG, "Set HW Key\n");
 
 
 
 
 
 
 
 
1930
1931	switch (cmd) {
1932	case SET_KEY:
1933		if (sta)
1934			ath9k_del_ps_key(sc, vif, sta);
1935
 
1936		ret = ath_key_config(common, vif, sta, key);
1937		if (ret >= 0) {
1938			key->hw_key_idx = ret;
1939			/* push IV and Michael MIC generation to stack */
1940			key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
1941			if (key->cipher == WLAN_CIPHER_SUITE_TKIP)
1942				key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
1943			if (sc->sc_ah->sw_mgmt_crypto &&
1944			    key->cipher == WLAN_CIPHER_SUITE_CCMP)
1945				key->flags |= IEEE80211_KEY_FLAG_SW_MGMT;
1946			ret = 0;
1947		}
 
 
 
 
 
 
 
 
 
1948		break;
1949	case DISABLE_KEY:
1950		ath_key_delete(common, key);
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1951		break;
1952	default:
1953		ret = -EINVAL;
1954	}
1955
1956	ath9k_ps_restore(sc);
1957	mutex_unlock(&sc->mutex);
1958
1959	return ret;
1960}
1961static void ath9k_bss_iter(void *data, u8 *mac, struct ieee80211_vif *vif)
1962{
1963	struct ath_softc *sc = data;
1964	struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1965	struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
1966	struct ath_vif *avp = (void *)vif->drv_priv;
1967
1968	/*
1969	 * Skip iteration if primary station vif's bss info
1970	 * was not changed
1971	 */
1972	if (sc->sc_flags & SC_OP_PRIM_STA_VIF)
1973		return;
1974
1975	if (bss_conf->assoc) {
1976		sc->sc_flags |= SC_OP_PRIM_STA_VIF;
1977		avp->primary_sta_vif = true;
1978		memcpy(common->curbssid, bss_conf->bssid, ETH_ALEN);
1979		common->curaid = bss_conf->aid;
1980		ath9k_hw_write_associd(sc->sc_ah);
1981		ath_dbg(common, ATH_DBG_CONFIG,
1982				"Bss Info ASSOC %d, bssid: %pM\n",
1983				bss_conf->aid, common->curbssid);
1984		ath_beacon_config(sc, vif);
1985		/*
1986		 * Request a re-configuration of Beacon related timers
1987		 * on the receipt of the first Beacon frame (i.e.,
1988		 * after time sync with the AP).
1989		 */
1990		sc->ps_flags |= PS_BEACON_SYNC | PS_WAIT_FOR_BEACON;
1991		/* Reset rssi stats */
1992		sc->last_rssi = ATH_RSSI_DUMMY_MARKER;
1993		sc->sc_ah->stats.avgbrssi = ATH_RSSI_DUMMY_MARKER;
1994
1995		if (!common->disable_ani) {
1996			sc->sc_flags |= SC_OP_ANI_RUN;
1997			ath_start_ani(common);
1998		}
1999
2000	}
2001}
2002
2003static void ath9k_config_bss(struct ath_softc *sc, struct ieee80211_vif *vif)
2004{
2005	struct ath_common *common = ath9k_hw_common(sc->sc_ah);
2006	struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
2007	struct ath_vif *avp = (void *)vif->drv_priv;
2008
2009	if (sc->sc_ah->opmode != NL80211_IFTYPE_STATION)
2010		return;
2011
2012	/* Reconfigure bss info */
2013	if (avp->primary_sta_vif && !bss_conf->assoc) {
2014		ath_dbg(common, ATH_DBG_CONFIG,
2015			"Bss Info DISASSOC %d, bssid %pM\n",
2016			common->curaid, common->curbssid);
2017		sc->sc_flags &= ~(SC_OP_PRIM_STA_VIF | SC_OP_BEACONS);
2018		avp->primary_sta_vif = false;
2019		memset(common->curbssid, 0, ETH_ALEN);
2020		common->curaid = 0;
2021	}
2022
2023	ieee80211_iterate_active_interfaces_atomic(
2024			sc->hw, ath9k_bss_iter, sc);
2025
2026	/*
2027	 * None of station vifs are associated.
2028	 * Clear bssid & aid
2029	 */
2030	if (!(sc->sc_flags & SC_OP_PRIM_STA_VIF)) {
2031		ath9k_hw_write_associd(sc->sc_ah);
2032		/* Stop ANI */
2033		sc->sc_flags &= ~SC_OP_ANI_RUN;
2034		del_timer_sync(&common->ani.timer);
2035	}
2036}
2037
2038static void ath9k_bss_info_changed(struct ieee80211_hw *hw,
2039				   struct ieee80211_vif *vif,
2040				   struct ieee80211_bss_conf *bss_conf,
2041				   u32 changed)
2042{
 
 
 
 
 
2043	struct ath_softc *sc = hw->priv;
2044	struct ath_hw *ah = sc->sc_ah;
2045	struct ath_common *common = ath9k_hw_common(ah);
2046	struct ath_vif *avp = (void *)vif->drv_priv;
2047	int slottime;
2048	int error;
2049
2050	ath9k_ps_wakeup(sc);
2051	mutex_lock(&sc->mutex);
2052
2053	if (changed & BSS_CHANGED_BSSID) {
2054		ath9k_config_bss(sc, vif);
 
2055
2056		ath_dbg(common, ATH_DBG_CONFIG, "BSSID: %pM aid: 0x%x\n",
2057			common->curbssid, common->curaid);
 
 
 
2058	}
2059
2060	if (changed & BSS_CHANGED_IBSS) {
2061		/* There can be only one vif available */
2062		memcpy(common->curbssid, bss_conf->bssid, ETH_ALEN);
2063		common->curaid = bss_conf->aid;
2064		ath9k_hw_write_associd(sc->sc_ah);
2065
2066		if (bss_conf->ibss_joined) {
2067			sc->sc_ah->stats.avgbrssi = ATH_RSSI_DUMMY_MARKER;
2068
2069			if (!common->disable_ani) {
2070				sc->sc_flags |= SC_OP_ANI_RUN;
2071				ath_start_ani(common);
2072			}
2073
2074		} else {
2075			sc->sc_flags &= ~SC_OP_ANI_RUN;
2076			del_timer_sync(&common->ani.timer);
2077		}
2078	}
2079
2080	/* Enable transmission of beacons (AP, IBSS, MESH) */
2081	if ((changed & BSS_CHANGED_BEACON) ||
2082	    ((changed & BSS_CHANGED_BEACON_ENABLED) && bss_conf->enable_beacon)) {
2083		ath9k_set_beaconing_status(sc, false);
2084		error = ath_beacon_alloc(sc, vif);
2085		if (!error)
2086			ath_beacon_config(sc, vif);
2087		ath9k_set_beaconing_status(sc, true);
2088	}
2089
2090	if (changed & BSS_CHANGED_ERP_SLOT) {
 
2091		if (bss_conf->use_short_slot)
2092			slottime = 9;
2093		else
2094			slottime = 20;
 
2095		if (vif->type == NL80211_IFTYPE_AP) {
2096			/*
2097			 * Defer update, so that connected stations can adjust
2098			 * their settings at the same time.
2099			 * See beacon.c for more details
2100			 */
2101			sc->beacon.slottime = slottime;
2102			sc->beacon.updateslot = UPDATE;
2103		} else {
2104			ah->slottime = slottime;
2105			ath9k_hw_init_global_settings(ah);
2106		}
2107	}
2108
2109	/* Disable transmission of beacons */
2110	if ((changed & BSS_CHANGED_BEACON_ENABLED) &&
2111	    !bss_conf->enable_beacon) {
2112		ath9k_set_beaconing_status(sc, false);
2113		avp->is_bslot_active = false;
2114		ath9k_set_beaconing_status(sc, true);
2115	}
2116
2117	if (changed & BSS_CHANGED_BEACON_INT) {
2118		/*
2119		 * In case of AP mode, the HW TSF has to be reset
2120		 * when the beacon interval changes.
2121		 */
2122		if (vif->type == NL80211_IFTYPE_AP) {
2123			sc->sc_flags |= SC_OP_TSF_RESET;
2124			ath9k_set_beaconing_status(sc, false);
2125			error = ath_beacon_alloc(sc, vif);
2126			if (!error)
2127				ath_beacon_config(sc, vif);
2128			ath9k_set_beaconing_status(sc, true);
2129		} else
2130			ath_beacon_config(sc, vif);
2131	}
2132
2133	if (changed & BSS_CHANGED_ERP_PREAMBLE) {
2134		ath_dbg(common, ATH_DBG_CONFIG, "BSS Changed PREAMBLE %d\n",
2135			bss_conf->use_short_preamble);
2136		if (bss_conf->use_short_preamble)
2137			sc->sc_flags |= SC_OP_PREAMBLE_SHORT;
2138		else
2139			sc->sc_flags &= ~SC_OP_PREAMBLE_SHORT;
2140	}
2141
2142	if (changed & BSS_CHANGED_ERP_CTS_PROT) {
2143		ath_dbg(common, ATH_DBG_CONFIG, "BSS Changed CTS PROT %d\n",
2144			bss_conf->use_cts_prot);
2145		if (bss_conf->use_cts_prot &&
2146		    hw->conf.channel->band != IEEE80211_BAND_5GHZ)
2147			sc->sc_flags |= SC_OP_PROTECT_ENABLE;
2148		else
2149			sc->sc_flags &= ~SC_OP_PROTECT_ENABLE;
2150	}
2151
2152	mutex_unlock(&sc->mutex);
2153	ath9k_ps_restore(sc);
 
 
2154}
2155
2156static u64 ath9k_get_tsf(struct ieee80211_hw *hw)
2157{
2158	struct ath_softc *sc = hw->priv;
 
2159	u64 tsf;
2160
2161	mutex_lock(&sc->mutex);
2162	ath9k_ps_wakeup(sc);
2163	tsf = ath9k_hw_gettsf64(sc->sc_ah);
 
 
 
 
 
 
 
2164	ath9k_ps_restore(sc);
2165	mutex_unlock(&sc->mutex);
2166
2167	return tsf;
2168}
2169
2170static void ath9k_set_tsf(struct ieee80211_hw *hw, u64 tsf)
 
 
2171{
2172	struct ath_softc *sc = hw->priv;
 
2173
2174	mutex_lock(&sc->mutex);
2175	ath9k_ps_wakeup(sc);
2176	ath9k_hw_settsf64(sc->sc_ah, tsf);
 
 
 
 
2177	ath9k_ps_restore(sc);
2178	mutex_unlock(&sc->mutex);
2179}
2180
2181static void ath9k_reset_tsf(struct ieee80211_hw *hw)
2182{
2183	struct ath_softc *sc = hw->priv;
 
2184
2185	mutex_lock(&sc->mutex);
2186
2187	ath9k_ps_wakeup(sc);
2188	ath9k_hw_reset_tsf(sc->sc_ah);
 
 
 
2189	ath9k_ps_restore(sc);
2190
2191	mutex_unlock(&sc->mutex);
2192}
2193
2194static int ath9k_ampdu_action(struct ieee80211_hw *hw,
2195			      struct ieee80211_vif *vif,
2196			      enum ieee80211_ampdu_mlme_action action,
2197			      struct ieee80211_sta *sta,
2198			      u16 tid, u16 *ssn, u8 buf_size)
2199{
2200	struct ath_softc *sc = hw->priv;
 
 
2201	int ret = 0;
 
 
 
 
 
 
2202
2203	local_bh_disable();
2204
2205	switch (action) {
2206	case IEEE80211_AMPDU_RX_START:
2207		if (!(sc->sc_flags & SC_OP_RXAGGR))
2208			ret = -ENOTSUPP;
2209		break;
2210	case IEEE80211_AMPDU_RX_STOP:
2211		break;
2212	case IEEE80211_AMPDU_TX_START:
2213		if (!(sc->sc_flags & SC_OP_TXAGGR))
2214			return -EOPNOTSUPP;
2215
 
 
 
2216		ath9k_ps_wakeup(sc);
2217		ret = ath_tx_aggr_start(sc, sta, tid, ssn);
2218		if (!ret)
2219			ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
2220		ath9k_ps_restore(sc);
2221		break;
2222	case IEEE80211_AMPDU_TX_STOP:
 
 
 
 
2223		ath9k_ps_wakeup(sc);
2224		ath_tx_aggr_stop(sc, sta, tid);
2225		ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
 
2226		ath9k_ps_restore(sc);
2227		break;
2228	case IEEE80211_AMPDU_TX_OPERATIONAL:
2229		ath9k_ps_wakeup(sc);
2230		ath_tx_aggr_resume(sc, sta, tid);
2231		ath9k_ps_restore(sc);
2232		break;
2233	default:
2234		ath_err(ath9k_hw_common(sc->sc_ah), "Unknown AMPDU action\n");
2235	}
2236
2237	local_bh_enable();
2238
2239	return ret;
2240}
2241
2242static int ath9k_get_survey(struct ieee80211_hw *hw, int idx,
2243			     struct survey_info *survey)
2244{
2245	struct ath_softc *sc = hw->priv;
2246	struct ath_common *common = ath9k_hw_common(sc->sc_ah);
2247	struct ieee80211_supported_band *sband;
2248	struct ieee80211_channel *chan;
2249	unsigned long flags;
2250	int pos;
2251
 
 
 
2252	spin_lock_irqsave(&common->cc_lock, flags);
2253	if (idx == 0)
2254		ath_update_survey_stats(sc);
2255
2256	sband = hw->wiphy->bands[IEEE80211_BAND_2GHZ];
2257	if (sband && idx >= sband->n_channels) {
2258		idx -= sband->n_channels;
2259		sband = NULL;
2260	}
2261
2262	if (!sband)
2263		sband = hw->wiphy->bands[IEEE80211_BAND_5GHZ];
2264
2265	if (!sband || idx >= sband->n_channels) {
2266		spin_unlock_irqrestore(&common->cc_lock, flags);
2267		return -ENOENT;
2268	}
2269
2270	chan = &sband->channels[idx];
2271	pos = chan->hw_value;
2272	memcpy(survey, &sc->survey[pos], sizeof(*survey));
2273	survey->channel = chan;
2274	spin_unlock_irqrestore(&common->cc_lock, flags);
2275
2276	return 0;
2277}
2278
2279static void ath9k_set_coverage_class(struct ieee80211_hw *hw, u8 coverage_class)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
2280{
2281	struct ath_softc *sc = hw->priv;
2282	struct ath_hw *ah = sc->sc_ah;
2283
 
 
 
2284	mutex_lock(&sc->mutex);
2285	ah->coverage_class = coverage_class;
2286
2287	ath9k_ps_wakeup(sc);
2288	ath9k_hw_init_global_settings(ah);
2289	ath9k_ps_restore(sc);
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
2290
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
2291	mutex_unlock(&sc->mutex);
2292}
2293
2294static void ath9k_flush(struct ieee80211_hw *hw, bool drop)
 
2295{
2296	struct ath_softc *sc = hw->priv;
2297	struct ath_hw *ah = sc->sc_ah;
2298	struct ath_common *common = ath9k_hw_common(ah);
2299	int timeout = 200; /* ms */
2300	int i, j;
2301	bool drain_txq;
2302
2303	mutex_lock(&sc->mutex);
2304	cancel_delayed_work_sync(&sc->tx_complete_work);
2305
2306	if (ah->ah_flags & AH_UNPLUGGED) {
2307		ath_dbg(common, ATH_DBG_ANY, "Device has been unplugged!\n");
2308		mutex_unlock(&sc->mutex);
2309		return;
2310	}
2311
2312	if (sc->sc_flags & SC_OP_INVALID) {
2313		ath_dbg(common, ATH_DBG_ANY, "Device not present\n");
2314		mutex_unlock(&sc->mutex);
2315		return;
2316	}
2317
2318	if (drop)
2319		timeout = 1;
2320
2321	for (j = 0; j < timeout; j++) {
2322		bool npend = false;
 
2323
2324		if (j)
2325			usleep_range(1000, 2000);
2326
2327		for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) {
2328			if (!ATH_TXQ_SETUP(sc, i))
2329				continue;
2330
2331			npend = ath9k_has_pending_frames(sc, &sc->tx.txq[i]);
 
 
 
 
2332
2333			if (npend)
2334				break;
2335		}
2336
2337		if (!npend)
2338		    goto out;
2339	}
2340
2341	ath9k_ps_wakeup(sc);
2342	spin_lock_bh(&sc->sc_pcu_lock);
2343	drain_txq = ath_drain_all_txq(sc, false);
2344	if (!drain_txq)
2345		ath_reset(sc, false);
2346	spin_unlock_bh(&sc->sc_pcu_lock);
2347	ath9k_ps_restore(sc);
2348	ieee80211_wake_queues(hw);
2349
2350out:
2351	ieee80211_queue_delayed_work(hw, &sc->tx_complete_work, 0);
2352	mutex_unlock(&sc->mutex);
2353}
2354
2355static bool ath9k_tx_frames_pending(struct ieee80211_hw *hw)
2356{
2357	struct ath_softc *sc = hw->priv;
2358	int i;
2359
2360	for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) {
2361		if (!ATH_TXQ_SETUP(sc, i))
2362			continue;
2363
2364		if (ath9k_has_pending_frames(sc, &sc->tx.txq[i]))
2365			return true;
2366	}
2367	return false;
2368}
2369
2370static int ath9k_tx_last_beacon(struct ieee80211_hw *hw)
2371{
2372	struct ath_softc *sc = hw->priv;
2373	struct ath_hw *ah = sc->sc_ah;
2374	struct ieee80211_vif *vif;
2375	struct ath_vif *avp;
2376	struct ath_buf *bf;
2377	struct ath_tx_status ts;
 
2378	int status;
2379
2380	vif = sc->beacon.bslot[0];
2381	if (!vif)
2382		return 0;
2383
2384	avp = (void *)vif->drv_priv;
2385	if (!avp->is_bslot_active)
2386		return 0;
2387
2388	if (!sc->beacon.tx_processed) {
 
 
2389		tasklet_disable(&sc->bcon_tasklet);
2390
2391		bf = avp->av_bcbuf;
2392		if (!bf || !bf->bf_mpdu)
2393			goto skip;
2394
2395		status = ath9k_hw_txprocdesc(ah, bf->bf_desc, &ts);
2396		if (status == -EINPROGRESS)
2397			goto skip;
2398
2399		sc->beacon.tx_processed = true;
2400		sc->beacon.tx_last = !(ts.ts_status & ATH9K_TXERR_MASK);
2401
2402skip:
2403		tasklet_enable(&sc->bcon_tasklet);
2404	}
2405
2406	return sc->beacon.tx_last;
2407}
2408
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
2409struct ieee80211_ops ath9k_ops = {
 
 
 
 
2410	.tx 		    = ath9k_tx,
2411	.start 		    = ath9k_start,
2412	.stop 		    = ath9k_stop,
2413	.add_interface 	    = ath9k_add_interface,
2414	.change_interface   = ath9k_change_interface,
2415	.remove_interface   = ath9k_remove_interface,
2416	.config 	    = ath9k_config,
2417	.configure_filter   = ath9k_configure_filter,
2418	.sta_add	    = ath9k_sta_add,
2419	.sta_remove	    = ath9k_sta_remove,
2420	.sta_notify         = ath9k_sta_notify,
2421	.conf_tx 	    = ath9k_conf_tx,
2422	.bss_info_changed   = ath9k_bss_info_changed,
2423	.set_key            = ath9k_set_key,
2424	.get_tsf 	    = ath9k_get_tsf,
2425	.set_tsf 	    = ath9k_set_tsf,
2426	.reset_tsf 	    = ath9k_reset_tsf,
2427	.ampdu_action       = ath9k_ampdu_action,
2428	.get_survey	    = ath9k_get_survey,
2429	.rfkill_poll        = ath9k_rfkill_poll_state,
2430	.set_coverage_class = ath9k_set_coverage_class,
2431	.flush		    = ath9k_flush,
2432	.tx_frames_pending  = ath9k_tx_frames_pending,
2433	.tx_last_beacon = ath9k_tx_last_beacon,
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
2434};