sta.c 91.0 KB
Newer Older
J
Johannes Berg 已提交
1 2 3 4 5 6 7
/******************************************************************************
 *
 * This file is provided under a dual BSD/GPLv2 license.  When using or
 * redistributing this file, you may do so under either license.
 *
 * GPL LICENSE SUMMARY
 *
8 9
 * Copyright(c) 2012 - 2015 Intel Corporation. All rights reserved.
 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
10
 * Copyright(c) 2016 Intel Deutschland GmbH
J
Johannes Berg 已提交
11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of version 2 of the GNU General Public License as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
 * USA
 *
 * The full GNU General Public License is included in this distribution
27
 * in the file called COPYING.
J
Johannes Berg 已提交
28 29
 *
 * Contact Information:
30
 *  Intel Linux Wireless <linuxwifi@intel.com>
J
Johannes Berg 已提交
31 32 33 34
 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
 *
 * BSD LICENSE
 *
35 36
 * Copyright(c) 2012 - 2015 Intel Corporation. All rights reserved.
 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
37
 * Copyright(c) 2016 Intel Deutschland GmbH
J
Johannes Berg 已提交
38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *  * Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *  * Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *  * Neither the name Intel Corporation nor the names of its
 *    contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 *****************************************************************************/
#include <net/mac80211.h>

#include "mvm.h"
#include "sta.h"
71
#include "rs.h"
J
Johannes Berg 已提交
72

73 74 75 76 77 78 79 80 81 82 83 84
/*
 * New version of ADD_STA_sta command added new fields at the end of the
 * structure, so sending the size of the relevant API's structure is enough to
 * support both API versions.
 */
static inline int iwl_mvm_add_sta_cmd_size(struct iwl_mvm *mvm)
{
	return iwl_mvm_has_new_rx_api(mvm) ?
		sizeof(struct iwl_mvm_add_sta_cmd) :
		sizeof(struct iwl_mvm_add_sta_cmd_v7);
}

85 86
static int iwl_mvm_find_free_sta_id(struct iwl_mvm *mvm,
				    enum nl80211_iftype iftype)
J
Johannes Berg 已提交
87 88
{
	int sta_id;
89
	u32 reserved_ids = 0;
J
Johannes Berg 已提交
90

91
	BUILD_BUG_ON(IWL_MVM_STATION_COUNT > 32);
J
Johannes Berg 已提交
92 93 94 95
	WARN_ON_ONCE(test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status));

	lockdep_assert_held(&mvm->mutex);

96 97 98 99
	/* d0i3/d3 assumes the AP's sta_id (of sta vif) is 0. reserve it. */
	if (iftype != NL80211_IFTYPE_STATION)
		reserved_ids = BIT(0);

J
Johannes Berg 已提交
100
	/* Don't take rcu_read_lock() since we are protected by mvm->mutex */
101 102 103 104
	for (sta_id = 0; sta_id < IWL_MVM_STATION_COUNT; sta_id++) {
		if (BIT(sta_id) & reserved_ids)
			continue;

J
Johannes Berg 已提交
105 106 107
		if (!rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
					       lockdep_is_held(&mvm->mutex)))
			return sta_id;
108
	}
J
Johannes Berg 已提交
109 110 111
	return IWL_MVM_STATION_COUNT;
}

112 113
/* send station add/update command to firmware */
int iwl_mvm_sta_send_to_fw(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
114
			   bool update, unsigned int flags)
J
Johannes Berg 已提交
115
{
116
	struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
117 118 119 120 121 122
	struct iwl_mvm_add_sta_cmd add_sta_cmd = {
		.sta_id = mvm_sta->sta_id,
		.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color),
		.add_modify = update ? 1 : 0,
		.station_flags_msk = cpu_to_le32(STA_FLG_FAT_EN_MSK |
						 STA_FLG_MIMO_EN_MSK),
123
		.tid_disable_tx = cpu_to_le16(mvm_sta->tid_disable_agg),
124
	};
J
Johannes Berg 已提交
125 126 127 128
	int ret;
	u32 status;
	u32 agg_size = 0, mpdu_dens = 0;

129
	if (!update || (flags & STA_MODIFY_QUEUES)) {
130 131
		add_sta_cmd.tfd_queue_msk = cpu_to_le32(mvm_sta->tfd_queue_msk);
		memcpy(&add_sta_cmd.addr, sta->addr, ETH_ALEN);
132 133 134

		if (flags & STA_MODIFY_QUEUES)
			add_sta_cmd.modify_mask |= STA_MODIFY_QUEUES;
135
	}
136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182

	switch (sta->bandwidth) {
	case IEEE80211_STA_RX_BW_160:
		add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_160MHZ);
		/* fall through */
	case IEEE80211_STA_RX_BW_80:
		add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_80MHZ);
		/* fall through */
	case IEEE80211_STA_RX_BW_40:
		add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_40MHZ);
		/* fall through */
	case IEEE80211_STA_RX_BW_20:
		if (sta->ht_cap.ht_supported)
			add_sta_cmd.station_flags |=
				cpu_to_le32(STA_FLG_FAT_EN_20MHZ);
		break;
	}

	switch (sta->rx_nss) {
	case 1:
		add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_SISO);
		break;
	case 2:
		add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_MIMO2);
		break;
	case 3 ... 8:
		add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_MIMO3);
		break;
	}

	switch (sta->smps_mode) {
	case IEEE80211_SMPS_AUTOMATIC:
	case IEEE80211_SMPS_NUM_MODES:
		WARN_ON(1);
		break;
	case IEEE80211_SMPS_STATIC:
		/* override NSS */
		add_sta_cmd.station_flags &= ~cpu_to_le32(STA_FLG_MIMO_EN_MSK);
		add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_SISO);
		break;
	case IEEE80211_SMPS_DYNAMIC:
		add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_RTS_MIMO_PROT);
		break;
	case IEEE80211_SMPS_OFF:
		/* nothing */
		break;
	}
J
Johannes Berg 已提交
183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205

	if (sta->ht_cap.ht_supported) {
		add_sta_cmd.station_flags_msk |=
			cpu_to_le32(STA_FLG_MAX_AGG_SIZE_MSK |
				    STA_FLG_AGG_MPDU_DENS_MSK);

		mpdu_dens = sta->ht_cap.ampdu_density;
	}

	if (sta->vht_cap.vht_supported) {
		agg_size = sta->vht_cap.cap &
			IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK;
		agg_size >>=
			IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_SHIFT;
	} else if (sta->ht_cap.ht_supported) {
		agg_size = sta->ht_cap.ampdu_factor;
	}

	add_sta_cmd.station_flags |=
		cpu_to_le32(agg_size << STA_FLG_MAX_AGG_SIZE_SHIFT);
	add_sta_cmd.station_flags |=
		cpu_to_le32(mpdu_dens << STA_FLG_AGG_MPDU_DENS_SHIFT);

206 207 208 209 210 211 212 213 214 215 216 217 218
	if (sta->wme) {
		add_sta_cmd.modify_mask |= STA_MODIFY_UAPSD_ACS;

		if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
			add_sta_cmd.uapsd_trigger_acs |= BIT(AC_BK);
		if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
			add_sta_cmd.uapsd_trigger_acs |= BIT(AC_BE);
		if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
			add_sta_cmd.uapsd_trigger_acs |= BIT(AC_VI);
		if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
			add_sta_cmd.uapsd_trigger_acs |= BIT(AC_VO);
	}

J
Johannes Berg 已提交
219
	status = ADD_STA_SUCCESS;
220 221
	ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
					  iwl_mvm_add_sta_cmd_size(mvm),
222
					  &add_sta_cmd, &status);
J
Johannes Berg 已提交
223 224 225
	if (ret)
		return ret;

226
	switch (status & IWL_ADD_STA_STATUS_MASK) {
J
Johannes Berg 已提交
227 228 229 230 231 232 233 234 235 236 237 238
	case ADD_STA_SUCCESS:
		IWL_DEBUG_ASSOC(mvm, "ADD_STA PASSED\n");
		break;
	default:
		ret = -EIO;
		IWL_ERR(mvm, "ADD_STA failed\n");
		break;
	}

	return ret;
}

239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271
static void iwl_mvm_rx_agg_session_expired(unsigned long data)
{
	struct iwl_mvm_baid_data __rcu **rcu_ptr = (void *)data;
	struct iwl_mvm_baid_data *ba_data;
	struct ieee80211_sta *sta;
	struct iwl_mvm_sta *mvm_sta;
	unsigned long timeout;

	rcu_read_lock();

	ba_data = rcu_dereference(*rcu_ptr);

	if (WARN_ON(!ba_data))
		goto unlock;

	if (!ba_data->timeout)
		goto unlock;

	timeout = ba_data->last_rx + TU_TO_JIFFIES(ba_data->timeout * 2);
	if (time_is_after_jiffies(timeout)) {
		mod_timer(&ba_data->session_timer, timeout);
		goto unlock;
	}

	/* Timer expired */
	sta = rcu_dereference(ba_data->mvm->fw_id_to_mac_id[ba_data->sta_id]);
	mvm_sta = iwl_mvm_sta_from_mac80211(sta);
	ieee80211_stop_rx_ba_session_offl(mvm_sta->vif,
					  sta->addr, ba_data->tid);
unlock:
	rcu_read_unlock();
}

272 273 274 275 276
static int iwl_mvm_tdls_sta_init(struct iwl_mvm *mvm,
				 struct ieee80211_sta *sta)
{
	unsigned long used_hw_queues;
	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
277 278
	unsigned int wdg_timeout =
		iwl_mvm_get_wd_timeout(mvm, NULL, true, false);
279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301
	u32 ac;

	lockdep_assert_held(&mvm->mutex);

	used_hw_queues = iwl_mvm_get_used_hw_queues(mvm, NULL);

	/* Find available queues, and allocate them to the ACs */
	for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
		u8 queue = find_first_zero_bit(&used_hw_queues,
					       mvm->first_agg_queue);

		if (queue >= mvm->first_agg_queue) {
			IWL_ERR(mvm, "Failed to allocate STA queue\n");
			return -EBUSY;
		}

		__set_bit(queue, &used_hw_queues);
		mvmsta->hw_queue[ac] = queue;
	}

	/* Found a place for all queues - enable them */
	for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
		iwl_mvm_enable_ac_txq(mvm, mvmsta->hw_queue[ac],
302
				      mvmsta->hw_queue[ac],
303 304
				      iwl_mvm_ac_to_tx_fifo[ac], 0,
				      wdg_timeout);
305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321
		mvmsta->tfd_queue_msk |= BIT(mvmsta->hw_queue[ac]);
	}

	return 0;
}

static void iwl_mvm_tdls_sta_deinit(struct iwl_mvm *mvm,
				    struct ieee80211_sta *sta)
{
	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
	unsigned long sta_msk;
	int i;

	lockdep_assert_held(&mvm->mutex);

	/* disable the TDLS STA-specific queues */
	sta_msk = mvmsta->tfd_queue_msk;
322
	for_each_set_bit(i, &sta_msk, sizeof(sta_msk) * BITS_PER_BYTE)
323
		iwl_mvm_disable_txq(mvm, i, i, IWL_MAX_TID_COUNT, 0);
324 325
}

326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376
/* Disable aggregations for a bitmap of TIDs for a given station */
static int iwl_mvm_invalidate_sta_queue(struct iwl_mvm *mvm, int queue,
					unsigned long disable_agg_tids,
					bool remove_queue)
{
	struct iwl_mvm_add_sta_cmd cmd = {};
	struct ieee80211_sta *sta;
	struct iwl_mvm_sta *mvmsta;
	u32 status;
	u8 sta_id;
	int ret;

	spin_lock_bh(&mvm->queue_info_lock);
	sta_id = mvm->queue_info[queue].ra_sta_id;
	spin_unlock_bh(&mvm->queue_info_lock);

	rcu_read_lock();

	sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);

	if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) {
		rcu_read_unlock();
		return -EINVAL;
	}

	mvmsta = iwl_mvm_sta_from_mac80211(sta);

	mvmsta->tid_disable_agg |= disable_agg_tids;

	cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color);
	cmd.sta_id = mvmsta->sta_id;
	cmd.add_modify = STA_MODE_MODIFY;
	cmd.modify_mask = STA_MODIFY_QUEUES;
	if (disable_agg_tids)
		cmd.modify_mask |= STA_MODIFY_TID_DISABLE_TX;
	if (remove_queue)
		cmd.modify_mask |= STA_MODIFY_QUEUE_REMOVAL;
	cmd.tfd_queue_msk = cpu_to_le32(mvmsta->tfd_queue_msk);
	cmd.tid_disable_tx = cpu_to_le16(mvmsta->tid_disable_agg);

	rcu_read_unlock();

	/* Notify FW of queue removal from the STA queues */
	status = ADD_STA_SUCCESS;
	ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
					  iwl_mvm_add_sta_cmd_size(mvm),
					  &cmd, &status);

	return ret;
}

377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410
static int iwl_mvm_get_queue_agg_tids(struct iwl_mvm *mvm, int queue)
{
	struct ieee80211_sta *sta;
	struct iwl_mvm_sta *mvmsta;
	unsigned long tid_bitmap;
	unsigned long agg_tids = 0;
	s8 sta_id;
	int tid;

	lockdep_assert_held(&mvm->mutex);

	spin_lock_bh(&mvm->queue_info_lock);
	sta_id = mvm->queue_info[queue].ra_sta_id;
	tid_bitmap = mvm->queue_info[queue].tid_bitmap;
	spin_unlock_bh(&mvm->queue_info_lock);

	sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
					lockdep_is_held(&mvm->mutex));

	if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta)))
		return -EINVAL;

	mvmsta = iwl_mvm_sta_from_mac80211(sta);

	spin_lock_bh(&mvmsta->lock);
	for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) {
		if (mvmsta->tid_data[tid].state == IWL_AGG_ON)
			agg_tids |= BIT(tid);
	}
	spin_unlock_bh(&mvmsta->lock);

	return agg_tids;
}

411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443
/*
 * Remove a queue from a station's resources.
 * Note that this only marks as free. It DOESN'T delete a BA agreement, and
 * doesn't disable the queue
 */
static int iwl_mvm_remove_sta_queue_marking(struct iwl_mvm *mvm, int queue)
{
	struct ieee80211_sta *sta;
	struct iwl_mvm_sta *mvmsta;
	unsigned long tid_bitmap;
	unsigned long disable_agg_tids = 0;
	u8 sta_id;
	int tid;

	lockdep_assert_held(&mvm->mutex);

	spin_lock_bh(&mvm->queue_info_lock);
	sta_id = mvm->queue_info[queue].ra_sta_id;
	tid_bitmap = mvm->queue_info[queue].tid_bitmap;
	spin_unlock_bh(&mvm->queue_info_lock);

	rcu_read_lock();

	sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);

	if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) {
		rcu_read_unlock();
		return 0;
	}

	mvmsta = iwl_mvm_sta_from_mac80211(sta);

	spin_lock_bh(&mvmsta->lock);
444
	/* Unmap MAC queues and TIDs from this queue */
445 446 447
	for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) {
		if (mvmsta->tid_data[tid].state == IWL_AGG_ON)
			disable_agg_tids |= BIT(tid);
448
		mvmsta->tid_data[tid].txq_id = IEEE80211_INVAL_HW_QUEUE;
449 450
	}

451
	mvmsta->tfd_queue_msk &= ~BIT(queue); /* Don't use this queue anymore */
452 453 454 455
	spin_unlock_bh(&mvmsta->lock);

	rcu_read_unlock();

456
	spin_lock_bh(&mvm->queue_info_lock);
457 458 459 460
	/* Unmap MAC queues and TIDs from this queue */
	mvm->queue_info[queue].hw_queue_to_mac80211 = 0;
	mvm->queue_info[queue].hw_queue_refcount = 0;
	mvm->queue_info[queue].tid_bitmap = 0;
461
	spin_unlock_bh(&mvm->queue_info_lock);
462 463 464 465

	return disable_agg_tids;
}

466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483
static int iwl_mvm_get_shared_queue(struct iwl_mvm *mvm,
				    unsigned long tfd_queue_mask, u8 ac)
{
	int queue = 0;
	u8 ac_to_queue[IEEE80211_NUM_ACS];
	int i;

	lockdep_assert_held(&mvm->queue_info_lock);

	memset(&ac_to_queue, IEEE80211_INVAL_HW_QUEUE, sizeof(ac_to_queue));

	/* See what ACs the existing queues for this STA have */
	for_each_set_bit(i, &tfd_queue_mask, IWL_MVM_DQA_MAX_DATA_QUEUE) {
		/* Only DATA queues can be shared */
		if (i < IWL_MVM_DQA_MIN_DATA_QUEUE &&
		    i != IWL_MVM_DQA_BSS_CLIENT_QUEUE)
			continue;

484 485 486 487 488
		/* Don't try and take queues being reconfigured */
		if (mvm->queue_info[queue].status ==
		    IWL_MVM_QUEUE_RECONFIGURING)
			continue;

489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521
		ac_to_queue[mvm->queue_info[i].mac80211_ac] = i;
	}

	/*
	 * The queue to share is chosen only from DATA queues as follows (in
	 * descending priority):
	 * 1. An AC_BE queue
	 * 2. Same AC queue
	 * 3. Highest AC queue that is lower than new AC
	 * 4. Any existing AC (there always is at least 1 DATA queue)
	 */

	/* Priority 1: An AC_BE queue */
	if (ac_to_queue[IEEE80211_AC_BE] != IEEE80211_INVAL_HW_QUEUE)
		queue = ac_to_queue[IEEE80211_AC_BE];
	/* Priority 2: Same AC queue */
	else if (ac_to_queue[ac] != IEEE80211_INVAL_HW_QUEUE)
		queue = ac_to_queue[ac];
	/* Priority 3a: If new AC is VO and VI exists - use VI */
	else if (ac == IEEE80211_AC_VO &&
		 ac_to_queue[IEEE80211_AC_VI] != IEEE80211_INVAL_HW_QUEUE)
		queue = ac_to_queue[IEEE80211_AC_VI];
	/* Priority 3b: No BE so only AC less than the new one is BK */
	else if (ac_to_queue[IEEE80211_AC_BK] != IEEE80211_INVAL_HW_QUEUE)
		queue = ac_to_queue[IEEE80211_AC_BK];
	/* Priority 4a: No BE nor BK - use VI if exists */
	else if (ac_to_queue[IEEE80211_AC_VI] != IEEE80211_INVAL_HW_QUEUE)
		queue = ac_to_queue[IEEE80211_AC_VI];
	/* Priority 4b: No BE, BK nor VI - use VO if exists */
	else if (ac_to_queue[IEEE80211_AC_VO] != IEEE80211_INVAL_HW_QUEUE)
		queue = ac_to_queue[IEEE80211_AC_VO];

	/* Make sure queue found (or not) is legal */
522 523 524
	if (!iwl_mvm_is_dqa_data_queue(mvm, queue) &&
	    !iwl_mvm_is_dqa_mgmt_queue(mvm, queue) &&
	    (queue != IWL_MVM_DQA_BSS_CLIENT_QUEUE)) {
525
		IWL_ERR(mvm, "No DATA queues available to share\n");
526 527 528 529 530 531 532 533 534
		return -ENOSPC;
	}

	/* Make sure the queue isn't in the middle of being reconfigured */
	if (mvm->queue_info[queue].status == IWL_MVM_QUEUE_RECONFIGURING) {
		IWL_ERR(mvm,
			"TXQ %d is in the middle of re-config - try again\n",
			queue);
		return -EBUSY;
535 536 537 538 539
	}

	return queue;
}

540
/*
541 542
 * If a given queue has a higher AC than the TID stream that is being compared
 * to, the queue needs to be redirected to the lower AC. This function does that
543 544 545
 * in such a case, otherwise - if no redirection required - it does nothing,
 * unless the %force param is true.
 */
546 547 548
int iwl_mvm_scd_queue_redirect(struct iwl_mvm *mvm, int queue, int tid,
			       int ac, int ssn, unsigned int wdg_timeout,
			       bool force)
549 550 551
{
	struct iwl_scd_txq_cfg_cmd cmd = {
		.scd_queue = queue,
552
		.action = SCD_CFG_DISABLE_QUEUE,
553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577
	};
	bool shared_queue;
	unsigned long mq;
	int ret;

	/*
	 * If the AC is lower than current one - FIFO needs to be redirected to
	 * the lowest one of the streams in the queue. Check if this is needed
	 * here.
	 * Notice that the enum ieee80211_ac_numbers is "flipped", so BK is with
	 * value 3 and VO with value 0, so to check if ac X is lower than ac Y
	 * we need to check if the numerical value of X is LARGER than of Y.
	 */
	spin_lock_bh(&mvm->queue_info_lock);
	if (ac <= mvm->queue_info[queue].mac80211_ac && !force) {
		spin_unlock_bh(&mvm->queue_info_lock);

		IWL_DEBUG_TX_QUEUES(mvm,
				    "No redirection needed on TXQ #%d\n",
				    queue);
		return 0;
	}

	cmd.sta_id = mvm->queue_info[queue].ra_sta_id;
	cmd.tx_fifo = iwl_mvm_ac_to_tx_fifo[mvm->queue_info[queue].mac80211_ac];
578
	cmd.tid = mvm->queue_info[queue].txq_tid;
579 580 581 582
	mq = mvm->queue_info[queue].hw_queue_to_mac80211;
	shared_queue = (mvm->queue_info[queue].hw_queue_refcount > 1);
	spin_unlock_bh(&mvm->queue_info_lock);

583
	IWL_DEBUG_TX_QUEUES(mvm, "Redirecting TXQ #%d to FIFO #%d\n",
584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603
			    queue, iwl_mvm_ac_to_tx_fifo[ac]);

	/* Stop MAC queues and wait for this queue to empty */
	iwl_mvm_stop_mac_queues(mvm, mq);
	ret = iwl_trans_wait_tx_queue_empty(mvm->trans, BIT(queue));
	if (ret) {
		IWL_ERR(mvm, "Error draining queue %d before reconfig\n",
			queue);
		ret = -EIO;
		goto out;
	}

	/* Before redirecting the queue we need to de-activate it */
	iwl_trans_txq_disable(mvm->trans, queue, false);
	ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), &cmd);
	if (ret)
		IWL_ERR(mvm, "Failed SCD disable TXQ %d (ret=%d)\n", queue,
			ret);

	/* Make sure the SCD wrptr is correctly set before reconfiguring */
604
	iwl_trans_txq_enable_cfg(mvm->trans, queue, ssn, NULL, wdg_timeout);
605

606 607 608 609 610
	/* Update the TID "owner" of the queue */
	spin_lock_bh(&mvm->queue_info_lock);
	mvm->queue_info[queue].txq_tid = tid;
	spin_unlock_bh(&mvm->queue_info_lock);

611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638
	/* TODO: Work-around SCD bug when moving back by multiples of 0x40 */

	/* Redirect to lower AC */
	iwl_mvm_reconfig_scd(mvm, queue, iwl_mvm_ac_to_tx_fifo[ac],
			     cmd.sta_id, tid, LINK_QUAL_AGG_FRAME_LIMIT_DEF,
			     ssn);

	/* Update AC marking of the queue */
	spin_lock_bh(&mvm->queue_info_lock);
	mvm->queue_info[queue].mac80211_ac = ac;
	spin_unlock_bh(&mvm->queue_info_lock);

	/*
	 * Mark queue as shared in transport if shared
	 * Note this has to be done after queue enablement because enablement
	 * can also set this value, and there is no indication there to shared
	 * queues
	 */
	if (shared_queue)
		iwl_trans_txq_set_shared_mode(mvm->trans, queue, true);

out:
	/* Continue using the MAC queues */
	iwl_mvm_start_mac_queues(mvm, mq);

	return ret;
}

639 640 641 642 643 644 645 646 647 648 649 650 651 652 653
static int iwl_mvm_sta_alloc_queue(struct iwl_mvm *mvm,
				   struct ieee80211_sta *sta, u8 ac, int tid,
				   struct ieee80211_hdr *hdr)
{
	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
	struct iwl_trans_txq_scd_cfg cfg = {
		.fifo = iwl_mvm_ac_to_tx_fifo[ac],
		.sta_id = mvmsta->sta_id,
		.tid = tid,
		.frame_limit = IWL_FRAME_LIMIT,
	};
	unsigned int wdg_timeout =
		iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false);
	u8 mac_queue = mvmsta->vif->hw_queue[ac];
	int queue = -1;
654 655 656
	bool using_inactive_queue = false;
	unsigned long disable_agg_tids = 0;
	enum iwl_mvm_agg_state queue_state;
657
	bool shared_queue = false;
658
	int ssn;
659
	unsigned long tfd_queue_mask;
660
	int ret;
661 662 663

	lockdep_assert_held(&mvm->mutex);

664 665 666 667
	spin_lock_bh(&mvmsta->lock);
	tfd_queue_mask = mvmsta->tfd_queue_msk;
	spin_unlock_bh(&mvmsta->lock);

668
	spin_lock_bh(&mvm->queue_info_lock);
669 670 671 672 673 674 675

	/*
	 * Non-QoS, QoS NDP and MGMT frames should go to a MGMT queue, if one
	 * exists
	 */
	if (!ieee80211_is_data_qos(hdr->frame_control) ||
	    ieee80211_is_qos_nullfunc(hdr->frame_control)) {
676 677
		queue = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id,
						IWL_MVM_DQA_MIN_MGMT_QUEUE,
678 679 680 681 682 683 684 685
						IWL_MVM_DQA_MAX_MGMT_QUEUE);
		if (queue >= IWL_MVM_DQA_MIN_MGMT_QUEUE)
			IWL_DEBUG_TX_QUEUES(mvm, "Found free MGMT queue #%d\n",
					    queue);

		/* If no such queue is found, we'll use a DATA queue instead */
	}

686 687 688 689 690
	if ((queue < 0 && mvmsta->reserved_queue != IEEE80211_INVAL_HW_QUEUE) &&
	    (mvm->queue_info[mvmsta->reserved_queue].status ==
	     IWL_MVM_QUEUE_RESERVED ||
	     mvm->queue_info[mvmsta->reserved_queue].status ==
	     IWL_MVM_QUEUE_INACTIVE)) {
691
		queue = mvmsta->reserved_queue;
692
		mvm->queue_info[queue].reserved = true;
693 694 695 696
		IWL_DEBUG_TX_QUEUES(mvm, "Using reserved queue #%d\n", queue);
	}

	if (queue < 0)
697 698
		queue = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id,
						IWL_MVM_DQA_MIN_DATA_QUEUE,
699
						IWL_MVM_DQA_MAX_DATA_QUEUE);
700

701 702 703 704 705 706 707 708 709 710 711 712 713 714 715
	/*
	 * Check if this queue is already allocated but inactive.
	 * In such a case, we'll need to first free this queue before enabling
	 * it again, so we'll mark it as reserved to make sure no new traffic
	 * arrives on it
	 */
	if (queue > 0 &&
	    mvm->queue_info[queue].status == IWL_MVM_QUEUE_INACTIVE) {
		mvm->queue_info[queue].status = IWL_MVM_QUEUE_RESERVED;
		using_inactive_queue = true;
		IWL_DEBUG_TX_QUEUES(mvm,
				    "Re-assigning TXQ %d: sta_id=%d, tid=%d\n",
				    queue, mvmsta->sta_id, tid);
	}

716 717 718 719 720 721 722 723 724
	/* No free queue - we'll have to share */
	if (queue <= 0) {
		queue = iwl_mvm_get_shared_queue(mvm, tfd_queue_mask, ac);
		if (queue > 0) {
			shared_queue = true;
			mvm->queue_info[queue].status = IWL_MVM_QUEUE_SHARED;
		}
	}

725 726 727 728 729 730
	/*
	 * Mark TXQ as ready, even though it hasn't been fully configured yet,
	 * to make sure no one else takes it.
	 * This will allow avoiding re-acquiring the lock at the end of the
	 * configuration. On error we'll mark it back as free.
	 */
731
	if ((queue > 0) && !shared_queue)
732
		mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY;
733

734
	spin_unlock_bh(&mvm->queue_info_lock);
735

736 737 738 739
	/* This shouldn't happen - out of queues */
	if (WARN_ON(queue <= 0)) {
		IWL_ERR(mvm, "No available queues for tid %d on sta_id %d\n",
			tid, cfg.sta_id);
740
		return queue;
741
	}
742 743 744 745 746 747 748

	/*
	 * Actual en/disablement of aggregations is through the ADD_STA HCMD,
	 * but for configuring the SCD to send A-MPDUs we need to mark the queue
	 * as aggregatable.
	 * Mark all DATA queues as allowing to be aggregated at some point
	 */
749 750
	cfg.aggregate = (queue >= IWL_MVM_DQA_MIN_DATA_QUEUE ||
			 queue == IWL_MVM_DQA_BSS_CLIENT_QUEUE);
751

752 753 754 755 756 757 758
	/*
	 * If this queue was previously inactive (idle) - we need to free it
	 * first
	 */
	if (using_inactive_queue) {
		struct iwl_scd_txq_cfg_cmd cmd = {
			.scd_queue = queue,
759
			.action = SCD_CFG_DISABLE_QUEUE,
760
		};
761
		u8 txq_curr_ac;
762 763 764

		disable_agg_tids = iwl_mvm_remove_sta_queue_marking(mvm, queue);

765
		spin_lock_bh(&mvm->queue_info_lock);
766
		txq_curr_ac = mvm->queue_info[queue].mac80211_ac;
767
		cmd.sta_id = mvm->queue_info[queue].ra_sta_id;
768
		cmd.tx_fifo = iwl_mvm_ac_to_tx_fifo[txq_curr_ac];
769
		cmd.tid = mvm->queue_info[queue].txq_tid;
770 771
		spin_unlock_bh(&mvm->queue_info_lock);

772
		/* Disable the queue */
773 774 775
		if (disable_agg_tids)
			iwl_mvm_invalidate_sta_queue(mvm, queue,
						     disable_agg_tids, false);
776 777 778 779 780 781 782 783 784 785 786 787 788 789 790
		iwl_trans_txq_disable(mvm->trans, queue, false);
		ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd),
					   &cmd);
		if (ret) {
			IWL_ERR(mvm,
				"Failed to free inactive queue %d (ret=%d)\n",
				queue, ret);

			/* Re-mark the inactive queue as inactive */
			spin_lock_bh(&mvm->queue_info_lock);
			mvm->queue_info[queue].status = IWL_MVM_QUEUE_INACTIVE;
			spin_unlock_bh(&mvm->queue_info_lock);

			return ret;
		}
791 792 793 794

		/* If TXQ is allocated to another STA, update removal in FW */
		if (cmd.sta_id != mvmsta->sta_id)
			iwl_mvm_invalidate_sta_queue(mvm, queue, 0, true);
795 796
	}

797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812
	IWL_DEBUG_TX_QUEUES(mvm,
			    "Allocating %squeue #%d to sta %d on tid %d\n",
			    shared_queue ? "shared " : "", queue,
			    mvmsta->sta_id, tid);

	if (shared_queue) {
		/* Disable any open aggs on this queue */
		disable_agg_tids = iwl_mvm_get_queue_agg_tids(mvm, queue);

		if (disable_agg_tids) {
			IWL_DEBUG_TX_QUEUES(mvm, "Disabling aggs on queue %d\n",
					    queue);
			iwl_mvm_invalidate_sta_queue(mvm, queue,
						     disable_agg_tids, false);
		}
	}
813 814 815 816 817

	ssn = IEEE80211_SEQ_TO_SN(le16_to_cpu(hdr->seq_ctrl));
	iwl_mvm_enable_txq(mvm, queue, mac_queue, ssn, &cfg,
			   wdg_timeout);

818 819 820 821 822 823 824 825 826
	/*
	 * Mark queue as shared in transport if shared
	 * Note this has to be done after queue enablement because enablement
	 * can also set this value, and there is no indication there to shared
	 * queues
	 */
	if (shared_queue)
		iwl_trans_txq_set_shared_mode(mvm->trans, queue, true);

827 828
	spin_lock_bh(&mvmsta->lock);
	mvmsta->tid_data[tid].txq_id = queue;
829
	mvmsta->tid_data[tid].is_tid_active = true;
830
	mvmsta->tfd_queue_msk |= BIT(queue);
831
	queue_state = mvmsta->tid_data[tid].state;
832 833 834 835 836

	if (mvmsta->reserved_queue == queue)
		mvmsta->reserved_queue = IEEE80211_INVAL_HW_QUEUE;
	spin_unlock_bh(&mvmsta->lock);

837 838 839 840
	if (!shared_queue) {
		ret = iwl_mvm_sta_send_to_fw(mvm, sta, true, STA_MODIFY_QUEUES);
		if (ret)
			goto out_err;
841

842 843 844 845 846 847
		/* If we need to re-enable aggregations... */
		if (queue_state == IWL_AGG_ON) {
			ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true);
			if (ret)
				goto out_err;
		}
848 849 850 851 852 853
	} else {
		/* Redirect queue, if needed */
		ret = iwl_mvm_scd_queue_redirect(mvm, queue, tid, ac, ssn,
						 wdg_timeout, false);
		if (ret)
			goto out_err;
854
	}
855

856
	return 0;
857 858 859 860 861

out_err:
	iwl_mvm_disable_txq(mvm, queue, mac_queue, tid, 0);

	return ret;
862 863
}

864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890
static void iwl_mvm_change_queue_owner(struct iwl_mvm *mvm, int queue)
{
	struct iwl_scd_txq_cfg_cmd cmd = {
		.scd_queue = queue,
		.action = SCD_CFG_UPDATE_QUEUE_TID,
	};
	s8 sta_id;
	int tid;
	unsigned long tid_bitmap;
	int ret;

	lockdep_assert_held(&mvm->mutex);

	spin_lock_bh(&mvm->queue_info_lock);
	sta_id = mvm->queue_info[queue].ra_sta_id;
	tid_bitmap = mvm->queue_info[queue].tid_bitmap;
	spin_unlock_bh(&mvm->queue_info_lock);

	if (WARN(!tid_bitmap, "TXQ %d has no tids assigned to it\n", queue))
		return;

	/* Find any TID for queue */
	tid = find_first_bit(&tid_bitmap, IWL_MAX_TID_COUNT + 1);
	cmd.tid = tid;
	cmd.tx_fifo = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]];

	ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), &cmd);
891
	if (ret) {
892 893
		IWL_ERR(mvm, "Failed to update owner of TXQ %d (ret=%d)\n",
			queue, ret);
894 895 896 897 898 899 900 901
		return;
	}

	spin_lock_bh(&mvm->queue_info_lock);
	mvm->queue_info[queue].txq_tid = tid;
	spin_unlock_bh(&mvm->queue_info_lock);
	IWL_DEBUG_TX_QUEUES(mvm, "Changed TXQ %d ownership to tid %d\n",
			    queue, tid);
902 903
}

904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953
static void iwl_mvm_unshare_queue(struct iwl_mvm *mvm, int queue)
{
	struct ieee80211_sta *sta;
	struct iwl_mvm_sta *mvmsta;
	s8 sta_id;
	int tid = -1;
	unsigned long tid_bitmap;
	unsigned int wdg_timeout;
	int ssn;
	int ret = true;

	lockdep_assert_held(&mvm->mutex);

	spin_lock_bh(&mvm->queue_info_lock);
	sta_id = mvm->queue_info[queue].ra_sta_id;
	tid_bitmap = mvm->queue_info[queue].tid_bitmap;
	spin_unlock_bh(&mvm->queue_info_lock);

	/* Find TID for queue, and make sure it is the only one on the queue */
	tid = find_first_bit(&tid_bitmap, IWL_MAX_TID_COUNT + 1);
	if (tid_bitmap != BIT(tid)) {
		IWL_ERR(mvm, "Failed to unshare q %d, active tids=0x%lx\n",
			queue, tid_bitmap);
		return;
	}

	IWL_DEBUG_TX_QUEUES(mvm, "Unsharing TXQ %d, keeping tid %d\n", queue,
			    tid);

	sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
					lockdep_is_held(&mvm->mutex));

	if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta)))
		return;

	mvmsta = iwl_mvm_sta_from_mac80211(sta);
	wdg_timeout = iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false);

	ssn = IEEE80211_SEQ_TO_SN(mvmsta->tid_data[tid].seq_number);

	ret = iwl_mvm_scd_queue_redirect(mvm, queue, tid,
					 tid_to_mac80211_ac[tid], ssn,
					 wdg_timeout, true);
	if (ret) {
		IWL_ERR(mvm, "Failed to redirect TXQ %d\n", queue);
		return;
	}

	/* If aggs should be turned back on - do it */
	if (mvmsta->tid_data[tid].state == IWL_AGG_ON) {
954
		struct iwl_mvm_add_sta_cmd cmd = {0};
955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981

		mvmsta->tid_disable_agg &= ~BIT(tid);

		cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color);
		cmd.sta_id = mvmsta->sta_id;
		cmd.add_modify = STA_MODE_MODIFY;
		cmd.modify_mask = STA_MODIFY_TID_DISABLE_TX;
		cmd.tfd_queue_msk = cpu_to_le32(mvmsta->tfd_queue_msk);
		cmd.tid_disable_tx = cpu_to_le16(mvmsta->tid_disable_agg);

		ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC,
					   iwl_mvm_add_sta_cmd_size(mvm), &cmd);
		if (!ret) {
			IWL_DEBUG_TX_QUEUES(mvm,
					    "TXQ #%d is now aggregated again\n",
					    queue);

			/* Mark queue intenally as aggregating again */
			iwl_trans_txq_set_shared_mode(mvm->trans, queue, false);
		}
	}

	spin_lock_bh(&mvm->queue_info_lock);
	mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY;
	spin_unlock_bh(&mvm->queue_info_lock);
}

982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026
static inline u8 iwl_mvm_tid_to_ac_queue(int tid)
{
	if (tid == IWL_MAX_TID_COUNT)
		return IEEE80211_AC_VO; /* MGMT */

	return tid_to_mac80211_ac[tid];
}

static void iwl_mvm_tx_deferred_stream(struct iwl_mvm *mvm,
				       struct ieee80211_sta *sta, int tid)
{
	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
	struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
	struct sk_buff *skb;
	struct ieee80211_hdr *hdr;
	struct sk_buff_head deferred_tx;
	u8 mac_queue;
	bool no_queue = false; /* Marks if there is a problem with the queue */
	u8 ac;

	lockdep_assert_held(&mvm->mutex);

	skb = skb_peek(&tid_data->deferred_tx_frames);
	if (!skb)
		return;
	hdr = (void *)skb->data;

	ac = iwl_mvm_tid_to_ac_queue(tid);
	mac_queue = IEEE80211_SKB_CB(skb)->hw_queue;

	if (tid_data->txq_id == IEEE80211_INVAL_HW_QUEUE &&
	    iwl_mvm_sta_alloc_queue(mvm, sta, ac, tid, hdr)) {
		IWL_ERR(mvm,
			"Can't alloc TXQ for sta %d tid %d - dropping frame\n",
			mvmsta->sta_id, tid);

		/*
		 * Mark queue as problematic so later the deferred traffic is
		 * freed, as we can do nothing with it
		 */
		no_queue = true;
	}

	__skb_queue_head_init(&deferred_tx);

1027 1028
	/* Disable bottom-halves when entering TX path */
	local_bh_disable();
1029 1030
	spin_lock(&mvmsta->lock);
	skb_queue_splice_init(&tid_data->deferred_tx_frames, &deferred_tx);
1031
	mvmsta->deferred_traffic_tid_map &= ~BIT(tid);
1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049
	spin_unlock(&mvmsta->lock);

	while ((skb = __skb_dequeue(&deferred_tx)))
		if (no_queue || iwl_mvm_tx_skb(mvm, skb, sta))
			ieee80211_free_txskb(mvm->hw, skb);
	local_bh_enable();

	/* Wake queue */
	iwl_mvm_start_mac_queues(mvm, BIT(mac_queue));
}

void iwl_mvm_add_new_dqa_stream_wk(struct work_struct *wk)
{
	struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm,
					   add_stream_wk);
	struct ieee80211_sta *sta;
	struct iwl_mvm_sta *mvmsta;
	unsigned long deferred_tid_traffic;
1050
	int queue, sta_id, tid;
1051

1052 1053 1054
	/* Check inactivity of queues */
	iwl_mvm_inactivity_check(mvm);

1055 1056
	mutex_lock(&mvm->mutex);

1057 1058 1059
	/* Reconfigure queues requiring reconfiguation */
	for (queue = 0; queue < IWL_MAX_HW_QUEUES; queue++) {
		bool reconfig;
1060
		bool change_owner;
1061 1062 1063 1064

		spin_lock_bh(&mvm->queue_info_lock);
		reconfig = (mvm->queue_info[queue].status ==
			    IWL_MVM_QUEUE_RECONFIGURING);
1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077

		/*
		 * We need to take into account a situation in which a TXQ was
		 * allocated to TID x, and then turned shared by adding TIDs y
		 * and z. If TID x becomes inactive and is removed from the TXQ,
		 * ownership must be given to one of the remaining TIDs.
		 * This is mainly because if TID x continues - a new queue can't
		 * be allocated for it as long as it is an owner of another TXQ.
		 */
		change_owner = !(mvm->queue_info[queue].tid_bitmap &
				 BIT(mvm->queue_info[queue].txq_tid)) &&
			       (mvm->queue_info[queue].status ==
				IWL_MVM_QUEUE_SHARED);
1078 1079 1080 1081
		spin_unlock_bh(&mvm->queue_info_lock);

		if (reconfig)
			iwl_mvm_unshare_queue(mvm, queue);
1082 1083
		else if (change_owner)
			iwl_mvm_change_queue_owner(mvm, queue);
1084 1085
	}

1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106
	/* Go over all stations with deferred traffic */
	for_each_set_bit(sta_id, mvm->sta_deferred_frames,
			 IWL_MVM_STATION_COUNT) {
		clear_bit(sta_id, mvm->sta_deferred_frames);
		sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
						lockdep_is_held(&mvm->mutex));
		if (IS_ERR_OR_NULL(sta))
			continue;

		mvmsta = iwl_mvm_sta_from_mac80211(sta);
		deferred_tid_traffic = mvmsta->deferred_traffic_tid_map;

		for_each_set_bit(tid, &deferred_tid_traffic,
				 IWL_MAX_TID_COUNT + 1)
			iwl_mvm_tx_deferred_stream(mvm, sta, tid);
	}

	mutex_unlock(&mvm->mutex);
}

static int iwl_mvm_reserve_sta_stream(struct iwl_mvm *mvm,
1107 1108
				      struct ieee80211_sta *sta,
				      enum nl80211_iftype vif_type)
1109 1110 1111 1112
{
	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
	int queue;

1113 1114 1115 1116 1117 1118
	/*
	 * Check for inactive queues, so we don't reach a situation where we
	 * can't add a STA due to a shortage in queues that doesn't really exist
	 */
	iwl_mvm_inactivity_check(mvm);

1119 1120 1121
	spin_lock_bh(&mvm->queue_info_lock);

	/* Make sure we have free resources for this STA */
1122 1123
	if (vif_type == NL80211_IFTYPE_STATION && !sta->tdls &&
	    !mvm->queue_info[IWL_MVM_DQA_BSS_CLIENT_QUEUE].hw_queue_refcount &&
1124 1125
	    (mvm->queue_info[IWL_MVM_DQA_BSS_CLIENT_QUEUE].status ==
	     IWL_MVM_QUEUE_FREE))
1126 1127
		queue = IWL_MVM_DQA_BSS_CLIENT_QUEUE;
	else
1128 1129
		queue = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id,
						IWL_MVM_DQA_MIN_DATA_QUEUE,
1130
						IWL_MVM_DQA_MAX_DATA_QUEUE);
1131 1132 1133 1134 1135
	if (queue < 0) {
		spin_unlock_bh(&mvm->queue_info_lock);
		IWL_ERR(mvm, "No available queues for new station\n");
		return -ENOSPC;
	}
1136
	mvm->queue_info[queue].status = IWL_MVM_QUEUE_RESERVED;
1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147

	spin_unlock_bh(&mvm->queue_info_lock);

	mvmsta->reserved_queue = queue;

	IWL_DEBUG_TX_QUEUES(mvm, "Reserving data queue #%d for sta_id %d\n",
			    queue, mvmsta->sta_id);

	return 0;
}

1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202
/*
 * In DQA mode, after a HW restart the queues should be allocated as before, in
 * order to avoid race conditions when there are shared queues. This function
 * does the re-mapping and queue allocation.
 *
 * Note that re-enabling aggregations isn't done in this function.
 */
static void iwl_mvm_realloc_queues_after_restart(struct iwl_mvm *mvm,
						 struct iwl_mvm_sta *mvm_sta)
{
	unsigned int wdg_timeout =
			iwl_mvm_get_wd_timeout(mvm, mvm_sta->vif, false, false);
	int i;
	struct iwl_trans_txq_scd_cfg cfg = {
		.sta_id = mvm_sta->sta_id,
		.frame_limit = IWL_FRAME_LIMIT,
	};

	/* Make sure reserved queue is still marked as such (or allocated) */
	mvm->queue_info[mvm_sta->reserved_queue].status =
		IWL_MVM_QUEUE_RESERVED;

	for (i = 0; i <= IWL_MAX_TID_COUNT; i++) {
		struct iwl_mvm_tid_data *tid_data = &mvm_sta->tid_data[i];
		int txq_id = tid_data->txq_id;
		int ac;
		u8 mac_queue;

		if (txq_id == IEEE80211_INVAL_HW_QUEUE)
			continue;

		skb_queue_head_init(&tid_data->deferred_tx_frames);

		ac = tid_to_mac80211_ac[i];
		mac_queue = mvm_sta->vif->hw_queue[ac];

		cfg.tid = i;
		cfg.fifo = iwl_mvm_ac_to_tx_fifo[ac];
		cfg.aggregate = (txq_id >= IWL_MVM_DQA_MIN_DATA_QUEUE ||
				 txq_id == IWL_MVM_DQA_BSS_CLIENT_QUEUE);

		IWL_DEBUG_TX_QUEUES(mvm,
				    "Re-mapping sta %d tid %d to queue %d\n",
				    mvm_sta->sta_id, i, txq_id);

		iwl_mvm_enable_txq(mvm, txq_id, mac_queue,
				   IEEE80211_SEQ_TO_SN(tid_data->seq_number),
				   &cfg, wdg_timeout);

		mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_READY;
	}

	atomic_set(&mvm->pending_frames[mvm_sta->sta_id], 0);
}

J
Johannes Berg 已提交
1203 1204 1205 1206 1207
int iwl_mvm_add_sta(struct iwl_mvm *mvm,
		    struct ieee80211_vif *vif,
		    struct ieee80211_sta *sta)
{
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1208
	struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
1209
	struct iwl_mvm_rxq_dup_data *dup_data;
J
Johannes Berg 已提交
1210 1211 1212 1213 1214
	int i, ret, sta_id;

	lockdep_assert_held(&mvm->mutex);

	if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
1215 1216
		sta_id = iwl_mvm_find_free_sta_id(mvm,
						  ieee80211_vif_type_p2p(vif));
J
Johannes Berg 已提交
1217 1218 1219
	else
		sta_id = mvm_sta->sta_id;

1220
	if (sta_id == IWL_MVM_STATION_COUNT)
J
Johannes Berg 已提交
1221 1222 1223 1224
		return -ENOSPC;

	spin_lock_init(&mvm_sta->lock);

1225 1226 1227 1228 1229 1230 1231
	/* In DQA mode, if this is a HW restart, re-alloc existing queues */
	if (iwl_mvm_is_dqa_supported(mvm) &&
	    test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
		iwl_mvm_realloc_queues_after_restart(mvm, mvm_sta);
		goto update_fw;
	}

J
Johannes Berg 已提交
1232 1233 1234 1235 1236
	mvm_sta->sta_id = sta_id;
	mvm_sta->mac_id_n_color = FW_CMD_ID_AND_COLOR(mvmvif->id,
						      mvmvif->color);
	mvm_sta->vif = vif;
	mvm_sta->max_agg_bufsize = LINK_QUAL_AGG_FRAME_LIMIT_DEF;
1237 1238
	mvm_sta->tx_protection = 0;
	mvm_sta->tt_tx_protection = false;
J
Johannes Berg 已提交
1239 1240

	/* HW restart, don't assume the memory has been zeroed */
1241
	atomic_set(&mvm->pending_frames[sta_id], 0);
1242
	mvm_sta->tid_disable_agg = 0xffff; /* No aggs at first */
J
Johannes Berg 已提交
1243
	mvm_sta->tfd_queue_msk = 0;
1244

1245 1246 1247 1248 1249
	/*
	 * Allocate new queues for a TDLS station, unless we're in DQA mode,
	 * and then they'll be allocated dynamically
	 */
	if (!iwl_mvm_is_dqa_supported(mvm) && sta->tdls) {
1250 1251 1252
		ret = iwl_mvm_tdls_sta_init(mvm, sta);
		if (ret)
			return ret;
1253
	} else if (!iwl_mvm_is_dqa_supported(mvm)) {
1254 1255 1256 1257
		for (i = 0; i < IEEE80211_NUM_ACS; i++)
			if (vif->hw_queue[i] != IEEE80211_INVAL_HW_QUEUE)
				mvm_sta->tfd_queue_msk |= BIT(vif->hw_queue[i]);
	}
J
Johannes Berg 已提交
1258

1259
	/* for HW restart - reset everything but the sequence number */
1260
	for (i = 0; i <= IWL_MAX_TID_COUNT; i++) {
1261 1262 1263
		u16 seq = mvm_sta->tid_data[i].seq_number;
		memset(&mvm_sta->tid_data[i], 0, sizeof(mvm_sta->tid_data[i]));
		mvm_sta->tid_data[i].seq_number = seq;
1264 1265 1266 1267 1268 1269 1270 1271 1272 1273

		if (!iwl_mvm_is_dqa_supported(mvm))
			continue;

		/*
		 * Mark all queues for this STA as unallocated and defer TX
		 * frames until the queue is allocated
		 */
		mvm_sta->tid_data[i].txq_id = IEEE80211_INVAL_HW_QUEUE;
		skb_queue_head_init(&mvm_sta->tid_data[i].deferred_tx_frames);
1274
	}
1275
	mvm_sta->deferred_traffic_tid_map = 0;
1276
	mvm_sta->agg_tids = 0;
J
Johannes Berg 已提交
1277

1278 1279 1280 1281 1282 1283 1284 1285 1286 1287
	if (iwl_mvm_has_new_rx_api(mvm) &&
	    !test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
		dup_data = kcalloc(mvm->trans->num_rx_queues,
				   sizeof(*dup_data),
				   GFP_KERNEL);
		if (!dup_data)
			return -ENOMEM;
		mvm_sta->dup_data = dup_data;
	}

1288
	if (iwl_mvm_is_dqa_supported(mvm)) {
1289 1290
		ret = iwl_mvm_reserve_sta_stream(mvm, sta,
						 ieee80211_vif_type_p2p(vif));
1291 1292 1293 1294
		if (ret)
			goto err;
	}

1295
update_fw:
1296
	ret = iwl_mvm_sta_send_to_fw(mvm, sta, false, 0);
J
Johannes Berg 已提交
1297
	if (ret)
1298
		goto err;
J
Johannes Berg 已提交
1299

1300 1301 1302 1303 1304 1305 1306 1307
	if (vif->type == NL80211_IFTYPE_STATION) {
		if (!sta->tdls) {
			WARN_ON(mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT);
			mvmvif->ap_sta_id = sta_id;
		} else {
			WARN_ON(mvmvif->ap_sta_id == IWL_MVM_STATION_COUNT);
		}
	}
J
Johannes Berg 已提交
1308 1309 1310 1311

	rcu_assign_pointer(mvm->fw_id_to_mac_id[sta_id], sta);

	return 0;
1312 1313

err:
1314 1315
	if (!iwl_mvm_is_dqa_supported(mvm) && sta->tdls)
		iwl_mvm_tdls_sta_deinit(mvm, sta);
1316
	return ret;
J
Johannes Berg 已提交
1317 1318 1319 1320 1321
}

int iwl_mvm_drain_sta(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta,
		      bool drain)
{
1322
	struct iwl_mvm_add_sta_cmd cmd = {};
J
Johannes Berg 已提交
1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334
	int ret;
	u32 status;

	lockdep_assert_held(&mvm->mutex);

	cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color);
	cmd.sta_id = mvmsta->sta_id;
	cmd.add_modify = STA_MODE_MODIFY;
	cmd.station_flags = drain ? cpu_to_le32(STA_FLG_DRAIN_FLOW) : 0;
	cmd.station_flags_msk = cpu_to_le32(STA_FLG_DRAIN_FLOW);

	status = ADD_STA_SUCCESS;
1335 1336
	ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
					  iwl_mvm_add_sta_cmd_size(mvm),
1337
					  &cmd, &status);
J
Johannes Berg 已提交
1338 1339 1340
	if (ret)
		return ret;

1341
	switch (status & IWL_ADD_STA_STATUS_MASK) {
J
Johannes Berg 已提交
1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377
	case ADD_STA_SUCCESS:
		IWL_DEBUG_INFO(mvm, "Frames for staid %d will drained in fw\n",
			       mvmsta->sta_id);
		break;
	default:
		ret = -EIO;
		IWL_ERR(mvm, "Couldn't drain frames for staid %d\n",
			mvmsta->sta_id);
		break;
	}

	return ret;
}

/*
 * Remove a station from the FW table. Before sending the command to remove
 * the station validate that the station is indeed known to the driver (sanity
 * only).
 */
static int iwl_mvm_rm_sta_common(struct iwl_mvm *mvm, u8 sta_id)
{
	struct ieee80211_sta *sta;
	struct iwl_mvm_rm_sta_cmd rm_sta_cmd = {
		.sta_id = sta_id,
	};
	int ret;

	sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
					lockdep_is_held(&mvm->mutex));

	/* Note: internal stations are marked as error values */
	if (!sta) {
		IWL_ERR(mvm, "Invalid station id\n");
		return -EINVAL;
	}

E
Emmanuel Grumbach 已提交
1378
	ret = iwl_mvm_send_cmd_pdu(mvm, REMOVE_STA, 0,
J
Johannes Berg 已提交
1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 1407
				   sizeof(rm_sta_cmd), &rm_sta_cmd);
	if (ret) {
		IWL_ERR(mvm, "Failed to remove station. Id=%d\n", sta_id);
		return ret;
	}

	return 0;
}

void iwl_mvm_sta_drained_wk(struct work_struct *wk)
{
	struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm, sta_drained_wk);
	u8 sta_id;

	/*
	 * The mutex is needed because of the SYNC cmd, but not only: if the
	 * work would run concurrently with iwl_mvm_rm_sta, it would run before
	 * iwl_mvm_rm_sta sets the station as busy, and exit. Then
	 * iwl_mvm_rm_sta would set the station as busy, and nobody will clean
	 * that later.
	 */
	mutex_lock(&mvm->mutex);

	for_each_set_bit(sta_id, mvm->sta_drained, IWL_MVM_STATION_COUNT) {
		int ret;
		struct ieee80211_sta *sta =
			rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
						  lockdep_is_held(&mvm->mutex));

1408 1409 1410 1411 1412 1413 1414 1415 1416
		/*
		 * This station is in use or RCU-removed; the latter happens in
		 * managed mode, where mac80211 removes the station before we
		 * can remove it from firmware (we can only do that after the
		 * MAC is marked unassociated), and possibly while the deauth
		 * frame to disconnect from the AP is still queued. Then, the
		 * station pointer is -ENOENT when the last skb is reclaimed.
		 */
		if (!IS_ERR(sta) || PTR_ERR(sta) == -ENOENT)
J
Johannes Berg 已提交
1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441
			continue;

		if (PTR_ERR(sta) == -EINVAL) {
			IWL_ERR(mvm, "Drained sta %d, but it is internal?\n",
				sta_id);
			continue;
		}

		if (!sta) {
			IWL_ERR(mvm, "Drained sta %d, but it was NULL?\n",
				sta_id);
			continue;
		}

		WARN_ON(PTR_ERR(sta) != -EBUSY);
		/* This station was removed and we waited until it got drained,
		 * we can now proceed and remove it.
		 */
		ret = iwl_mvm_rm_sta_common(mvm, sta_id);
		if (ret) {
			IWL_ERR(mvm,
				"Couldn't remove sta %d after it was drained\n",
				sta_id);
			continue;
		}
1442
		RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta_id], NULL);
J
Johannes Berg 已提交
1443
		clear_bit(sta_id, mvm->sta_drained);
1444 1445 1446 1447

		if (mvm->tfd_drained[sta_id]) {
			unsigned long i, msk = mvm->tfd_drained[sta_id];

1448
			for_each_set_bit(i, &msk, sizeof(msk) * BITS_PER_BYTE)
1449 1450
				iwl_mvm_disable_txq(mvm, i, i,
						    IWL_MAX_TID_COUNT, 0);
1451 1452 1453 1454 1455

			mvm->tfd_drained[sta_id] = 0;
			IWL_DEBUG_TDLS(mvm, "Drained sta %d, with queues %ld\n",
				       sta_id, msk);
		}
J
Johannes Berg 已提交
1456 1457 1458 1459 1460
	}

	mutex_unlock(&mvm->mutex);
}

1461 1462 1463 1464 1465 1466 1467 1468 1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480
static void iwl_mvm_disable_sta_queues(struct iwl_mvm *mvm,
				       struct ieee80211_vif *vif,
				       struct iwl_mvm_sta *mvm_sta)
{
	int ac;
	int i;

	lockdep_assert_held(&mvm->mutex);

	for (i = 0; i < ARRAY_SIZE(mvm_sta->tid_data); i++) {
		if (mvm_sta->tid_data[i].txq_id == IEEE80211_INVAL_HW_QUEUE)
			continue;

		ac = iwl_mvm_tid_to_ac_queue(i);
		iwl_mvm_disable_txq(mvm, mvm_sta->tid_data[i].txq_id,
				    vif->hw_queue[ac], i, 0);
		mvm_sta->tid_data[i].txq_id = IEEE80211_INVAL_HW_QUEUE;
	}
}

J
Johannes Berg 已提交
1481 1482 1483 1484 1485
int iwl_mvm_rm_sta(struct iwl_mvm *mvm,
		   struct ieee80211_vif *vif,
		   struct ieee80211_sta *sta)
{
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1486
	struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
J
Johannes Berg 已提交
1487 1488 1489 1490
	int ret;

	lockdep_assert_held(&mvm->mutex);

1491 1492 1493
	if (iwl_mvm_has_new_rx_api(mvm))
		kfree(mvm_sta->dup_data);

1494 1495 1496
	if ((vif->type == NL80211_IFTYPE_STATION &&
	     mvmvif->ap_sta_id == mvm_sta->sta_id) ||
	    iwl_mvm_is_dqa_supported(mvm)){
1497 1498 1499
		ret = iwl_mvm_drain_sta(mvm, mvm_sta, true);
		if (ret)
			return ret;
1500
		/* flush its queues here since we are freeing mvm_sta */
1501
		ret = iwl_mvm_flush_tx_path(mvm, mvm_sta->tfd_queue_msk, 0);
1502 1503 1504 1505 1506 1507 1508
		if (ret)
			return ret;
		ret = iwl_trans_wait_tx_queue_empty(mvm->trans,
						    mvm_sta->tfd_queue_msk);
		if (ret)
			return ret;
		ret = iwl_mvm_drain_sta(mvm, mvm_sta, false);
1509

1510
		/* If DQA is supported - the queues can be disabled now */
1511 1512 1513 1514 1515 1516
		if (iwl_mvm_is_dqa_supported(mvm))
			iwl_mvm_disable_sta_queues(mvm, vif, mvm_sta);

		/* If there is a TXQ still marked as reserved - free it */
		if (iwl_mvm_is_dqa_supported(mvm) &&
		    mvm_sta->reserved_queue != IEEE80211_INVAL_HW_QUEUE) {
1517 1518 1519 1520 1521 1522 1523 1524 1525 1526 1527 1528 1529 1530 1531 1532 1533 1534 1535 1536 1537 1538
			u8 reserved_txq = mvm_sta->reserved_queue;
			enum iwl_mvm_queue_status *status;

			/*
			 * If no traffic has gone through the reserved TXQ - it
			 * is still marked as IWL_MVM_QUEUE_RESERVED, and
			 * should be manually marked as free again
			 */
			spin_lock_bh(&mvm->queue_info_lock);
			status = &mvm->queue_info[reserved_txq].status;
			if (WARN((*status != IWL_MVM_QUEUE_RESERVED) &&
				 (*status != IWL_MVM_QUEUE_FREE),
				 "sta_id %d reserved txq %d status %d",
				 mvm_sta->sta_id, reserved_txq, *status)) {
				spin_unlock_bh(&mvm->queue_info_lock);
				return -EINVAL;
			}

			*status = IWL_MVM_QUEUE_FREE;
			spin_unlock_bh(&mvm->queue_info_lock);
		}

1539 1540 1541 1542 1543
		if (vif->type == NL80211_IFTYPE_STATION &&
		    mvmvif->ap_sta_id == mvm_sta->sta_id) {
			/* if associated - we can't remove the AP STA now */
			if (vif->bss_conf.assoc)
				return ret;
J
Johannes Berg 已提交
1544

1545 1546
			/* unassoc - go ahead - remove the AP STA now */
			mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
1547

1548 1549 1550 1551
			/* clear d0i3_ap_sta_id if no longer relevant */
			if (mvm->d0i3_ap_sta_id == mvm_sta->sta_id)
				mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
		}
J
Johannes Berg 已提交
1552 1553
	}

1554 1555 1556 1557 1558 1559 1560 1561 1562
	/*
	 * This shouldn't happen - the TDLS channel switch should be canceled
	 * before the STA is removed.
	 */
	if (WARN_ON_ONCE(mvm->tdls_cs.peer.sta_id == mvm_sta->sta_id)) {
		mvm->tdls_cs.peer.sta_id = IWL_MVM_STATION_COUNT;
		cancel_delayed_work(&mvm->tdls_cs.dwork);
	}

1563 1564 1565 1566 1567
	/*
	 * Make sure that the tx response code sees the station as -EBUSY and
	 * calls the drain worker.
	 */
	spin_lock_bh(&mvm_sta->lock);
J
Johannes Berg 已提交
1568 1569 1570 1571
	/*
	 * There are frames pending on the AC queues for this station.
	 * We need to wait until all the frames are drained...
	 */
1572
	if (atomic_read(&mvm->pending_frames[mvm_sta->sta_id])) {
J
Johannes Berg 已提交
1573 1574
		rcu_assign_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id],
				   ERR_PTR(-EBUSY));
1575
		spin_unlock_bh(&mvm_sta->lock);
1576 1577 1578 1579 1580 1581 1582 1583 1584

		/* disable TDLS sta queues on drain complete */
		if (sta->tdls) {
			mvm->tfd_drained[mvm_sta->sta_id] =
							mvm_sta->tfd_queue_msk;
			IWL_DEBUG_TDLS(mvm, "Draining TDLS sta %d\n",
				       mvm_sta->sta_id);
		}

1585
		ret = iwl_mvm_drain_sta(mvm, mvm_sta, true);
J
Johannes Berg 已提交
1586
	} else {
1587
		spin_unlock_bh(&mvm_sta->lock);
1588

1589
		if (!iwl_mvm_is_dqa_supported(mvm) && sta->tdls)
1590 1591
			iwl_mvm_tdls_sta_deinit(mvm, sta);

J
Johannes Berg 已提交
1592
		ret = iwl_mvm_rm_sta_common(mvm, mvm_sta->sta_id);
1593
		RCU_INIT_POINTER(mvm->fw_id_to_mac_id[mvm_sta->sta_id], NULL);
J
Johannes Berg 已提交
1594 1595 1596 1597 1598 1599 1600 1601 1602 1603 1604 1605 1606
	}

	return ret;
}

int iwl_mvm_rm_sta_id(struct iwl_mvm *mvm,
		      struct ieee80211_vif *vif,
		      u8 sta_id)
{
	int ret = iwl_mvm_rm_sta_common(mvm, sta_id);

	lockdep_assert_held(&mvm->mutex);

1607
	RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta_id], NULL);
J
Johannes Berg 已提交
1608 1609 1610
	return ret;
}

1611 1612 1613
int iwl_mvm_allocate_int_sta(struct iwl_mvm *mvm,
			     struct iwl_mvm_int_sta *sta,
			     u32 qmask, enum nl80211_iftype iftype)
J
Johannes Berg 已提交
1614 1615
{
	if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
1616
		sta->sta_id = iwl_mvm_find_free_sta_id(mvm, iftype);
J
Johannes Berg 已提交
1617 1618 1619 1620 1621 1622 1623 1624 1625 1626 1627
		if (WARN_ON_ONCE(sta->sta_id == IWL_MVM_STATION_COUNT))
			return -ENOSPC;
	}

	sta->tfd_queue_msk = qmask;

	/* put a non-NULL value so iterating over the stations won't stop */
	rcu_assign_pointer(mvm->fw_id_to_mac_id[sta->sta_id], ERR_PTR(-EINVAL));
	return 0;
}

1628 1629
static void iwl_mvm_dealloc_int_sta(struct iwl_mvm *mvm,
				    struct iwl_mvm_int_sta *sta)
J
Johannes Berg 已提交
1630
{
1631
	RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta->sta_id], NULL);
J
Johannes Berg 已提交
1632 1633 1634 1635 1636 1637 1638 1639 1640
	memset(sta, 0, sizeof(struct iwl_mvm_int_sta));
	sta->sta_id = IWL_MVM_STATION_COUNT;
}

static int iwl_mvm_add_int_sta_common(struct iwl_mvm *mvm,
				      struct iwl_mvm_int_sta *sta,
				      const u8 *addr,
				      u16 mac_id, u16 color)
{
1641
	struct iwl_mvm_add_sta_cmd cmd;
J
Johannes Berg 已提交
1642 1643 1644 1645 1646
	int ret;
	u32 status;

	lockdep_assert_held(&mvm->mutex);

1647
	memset(&cmd, 0, sizeof(cmd));
J
Johannes Berg 已提交
1648 1649 1650 1651 1652
	cmd.sta_id = sta->sta_id;
	cmd.mac_id_n_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(mac_id,
							     color));

	cmd.tfd_queue_msk = cpu_to_le32(sta->tfd_queue_msk);
1653
	cmd.tid_disable_tx = cpu_to_le16(0xffff);
J
Johannes Berg 已提交
1654 1655 1656 1657

	if (addr)
		memcpy(cmd.addr, addr, ETH_ALEN);

1658 1659
	ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
					  iwl_mvm_add_sta_cmd_size(mvm),
1660
					  &cmd, &status);
J
Johannes Berg 已提交
1661 1662 1663
	if (ret)
		return ret;

1664
	switch (status & IWL_ADD_STA_STATUS_MASK) {
J
Johannes Berg 已提交
1665 1666 1667 1668 1669 1670 1671 1672 1673 1674 1675 1676 1677 1678
	case ADD_STA_SUCCESS:
		IWL_DEBUG_INFO(mvm, "Internal station added.\n");
		return 0;
	default:
		ret = -EIO;
		IWL_ERR(mvm, "Add internal station failed, status=0x%x\n",
			status);
		break;
	}
	return ret;
}

int iwl_mvm_add_aux_sta(struct iwl_mvm *mvm)
{
1679 1680 1681
	unsigned int wdg_timeout = iwlmvm_mod_params.tfd_q_hang_detect ?
					mvm->cfg->base_params->wd_timeout :
					IWL_WATCHDOG_DISABLED;
J
Johannes Berg 已提交
1682 1683 1684 1685
	int ret;

	lockdep_assert_held(&mvm->mutex);

A
Ariej Marjieh 已提交
1686
	/* Map Aux queue to fifo - needs to happen before adding Aux station */
1687 1688 1689
	if (!iwl_mvm_is_dqa_supported(mvm))
		iwl_mvm_enable_ac_txq(mvm, mvm->aux_queue, mvm->aux_queue,
				      IWL_MVM_TX_FIFO_MCAST, 0, wdg_timeout);
A
Ariej Marjieh 已提交
1690 1691 1692

	/* Allocate aux station and assign to it the aux queue */
	ret = iwl_mvm_allocate_int_sta(mvm, &mvm->aux_sta, BIT(mvm->aux_queue),
1693
				       NL80211_IFTYPE_UNSPECIFIED);
J
Johannes Berg 已提交
1694 1695 1696
	if (ret)
		return ret;

1697 1698 1699 1700 1701 1702 1703 1704 1705 1706 1707 1708 1709
	if (iwl_mvm_is_dqa_supported(mvm)) {
		struct iwl_trans_txq_scd_cfg cfg = {
			.fifo = IWL_MVM_TX_FIFO_MCAST,
			.sta_id = mvm->aux_sta.sta_id,
			.tid = IWL_MAX_TID_COUNT,
			.aggregate = false,
			.frame_limit = IWL_FRAME_LIMIT,
		};

		iwl_mvm_enable_txq(mvm, mvm->aux_queue, mvm->aux_queue, 0, &cfg,
				   wdg_timeout);
	}

J
Johannes Berg 已提交
1710 1711 1712 1713 1714 1715 1716 1717
	ret = iwl_mvm_add_int_sta_common(mvm, &mvm->aux_sta, NULL,
					 MAC_INDEX_AUX, 0);

	if (ret)
		iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta);
	return ret;
}

1718 1719 1720 1721 1722 1723 1724 1725 1726 1727 1728 1729 1730 1731 1732 1733 1734 1735 1736 1737 1738 1739 1740 1741 1742 1743 1744
int iwl_mvm_add_snif_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
{
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);

	lockdep_assert_held(&mvm->mutex);
	return iwl_mvm_add_int_sta_common(mvm, &mvm->snif_sta, vif->addr,
					 mvmvif->id, 0);
}

int iwl_mvm_rm_snif_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
{
	int ret;

	lockdep_assert_held(&mvm->mutex);

	ret = iwl_mvm_rm_sta_common(mvm, mvm->snif_sta.sta_id);
	if (ret)
		IWL_WARN(mvm, "Failed sending remove station\n");

	return ret;
}

void iwl_mvm_dealloc_snif_sta(struct iwl_mvm *mvm)
{
	iwl_mvm_dealloc_int_sta(mvm, &mvm->snif_sta);
}

1745 1746 1747 1748 1749 1750 1751
void iwl_mvm_del_aux_sta(struct iwl_mvm *mvm)
{
	lockdep_assert_held(&mvm->mutex);

	iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta);
}

J
Johannes Berg 已提交
1752 1753 1754 1755 1756 1757 1758 1759
/*
 * Send the add station command for the vif's broadcast station.
 * Assumes that the station was already allocated.
 *
 * @mvm: the mvm component
 * @vif: the interface to which the broadcast station is added
 * @bsta: the broadcast station to add.
 */
1760
int iwl_mvm_send_add_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
J
Johannes Berg 已提交
1761 1762
{
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1763
	struct iwl_mvm_int_sta *bsta = &mvmvif->bcast_sta;
J
Johannes Berg 已提交
1764
	static const u8 _baddr[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
1765
	const u8 *baddr = _baddr;
J
Johannes Berg 已提交
1766 1767 1768

	lockdep_assert_held(&mvm->mutex);

1769 1770 1771 1772 1773 1774 1775 1776 1777 1778 1779 1780 1781 1782 1783 1784
	if (iwl_mvm_is_dqa_supported(mvm)) {
		struct iwl_trans_txq_scd_cfg cfg = {
			.fifo = IWL_MVM_TX_FIFO_VO,
			.sta_id = mvmvif->bcast_sta.sta_id,
			.tid = IWL_MAX_TID_COUNT,
			.aggregate = false,
			.frame_limit = IWL_FRAME_LIMIT,
		};
		unsigned int wdg_timeout =
			iwl_mvm_get_wd_timeout(mvm, vif, false, false);
		int queue;

		if ((vif->type == NL80211_IFTYPE_AP) &&
		    (mvmvif->bcast_sta.tfd_queue_msk &
		     BIT(IWL_MVM_DQA_AP_PROBE_RESP_QUEUE)))
			queue = IWL_MVM_DQA_AP_PROBE_RESP_QUEUE;
1785 1786 1787 1788
		else if ((vif->type == NL80211_IFTYPE_P2P_DEVICE) &&
			 (mvmvif->bcast_sta.tfd_queue_msk &
			  BIT(IWL_MVM_DQA_P2P_DEVICE_QUEUE)))
			queue = IWL_MVM_DQA_P2P_DEVICE_QUEUE;
1789 1790 1791 1792 1793 1794 1795
		else if (WARN(1, "Missed required TXQ for adding bcast STA\n"))
			return -EINVAL;

		iwl_mvm_enable_txq(mvm, queue, vif->hw_queue[0], 0, &cfg,
				   wdg_timeout);
	}

J
Johannes Berg 已提交
1796 1797 1798
	if (vif->type == NL80211_IFTYPE_ADHOC)
		baddr = vif->bss_conf.bssid;

J
Johannes Berg 已提交
1799 1800 1801 1802 1803 1804 1805 1806 1807
	if (WARN_ON_ONCE(bsta->sta_id == IWL_MVM_STATION_COUNT))
		return -ENOSPC;

	return iwl_mvm_add_int_sta_common(mvm, bsta, baddr,
					  mvmvif->id, mvmvif->color);
}

/* Send the FW a request to remove the station from it's internal data
 * structures, but DO NOT remove the entry from the local data structures. */
1808
int iwl_mvm_send_rm_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
J
Johannes Berg 已提交
1809
{
1810
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
J
Johannes Berg 已提交
1811 1812 1813 1814
	int ret;

	lockdep_assert_held(&mvm->mutex);

1815
	ret = iwl_mvm_rm_sta_common(mvm, mvmvif->bcast_sta.sta_id);
J
Johannes Berg 已提交
1816 1817 1818 1819 1820
	if (ret)
		IWL_WARN(mvm, "Failed sending remove station\n");
	return ret;
}

1821 1822 1823
int iwl_mvm_alloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
{
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1824
	u32 qmask = 0;
1825 1826 1827

	lockdep_assert_held(&mvm->mutex);

1828 1829
	if (!iwl_mvm_is_dqa_supported(mvm))
		qmask = iwl_mvm_mac_get_queues_mask(vif);
1830

1831 1832 1833 1834 1835 1836
	if (vif->type == NL80211_IFTYPE_AP) {
		/*
		 * The firmware defines the TFD queue mask to only be relevant
		 * for *unicast* queues, so the multicast (CAB) queue shouldn't
		 * be included.
		 */
1837 1838
		qmask &= ~BIT(vif->cab_queue);

1839 1840
		if (iwl_mvm_is_dqa_supported(mvm))
			qmask |= BIT(IWL_MVM_DQA_AP_PROBE_RESP_QUEUE);
1841 1842 1843
	} else if (iwl_mvm_is_dqa_supported(mvm) &&
		   vif->type == NL80211_IFTYPE_P2P_DEVICE) {
		qmask |= BIT(IWL_MVM_DQA_P2P_DEVICE_QUEUE);
1844 1845
	}

1846 1847 1848 1849
	return iwl_mvm_allocate_int_sta(mvm, &mvmvif->bcast_sta, qmask,
					ieee80211_vif_type_p2p(vif));
}

J
Johannes Berg 已提交
1850 1851 1852 1853 1854 1855 1856
/* Allocate a new station entry for the broadcast station to the given vif,
 * and send it to the FW.
 * Note that each P2P mac should have its own broadcast station.
 *
 * @mvm: the mvm component
 * @vif: the interface to which the broadcast station is added
 * @bsta: the broadcast station to add. */
1857
int iwl_mvm_add_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
J
Johannes Berg 已提交
1858 1859
{
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1860
	struct iwl_mvm_int_sta *bsta = &mvmvif->bcast_sta;
J
Johannes Berg 已提交
1861 1862 1863 1864
	int ret;

	lockdep_assert_held(&mvm->mutex);

1865
	ret = iwl_mvm_alloc_bcast_sta(mvm, vif);
J
Johannes Berg 已提交
1866 1867 1868
	if (ret)
		return ret;

1869
	ret = iwl_mvm_send_add_bcast_sta(mvm, vif);
J
Johannes Berg 已提交
1870 1871 1872

	if (ret)
		iwl_mvm_dealloc_int_sta(mvm, bsta);
1873

J
Johannes Berg 已提交
1874 1875 1876
	return ret;
}

1877 1878 1879 1880 1881 1882 1883
void iwl_mvm_dealloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
{
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);

	iwl_mvm_dealloc_int_sta(mvm, &mvmvif->bcast_sta);
}

J
Johannes Berg 已提交
1884 1885 1886 1887
/*
 * Send the FW a request to remove the station from it's internal data
 * structures, and in addition remove it from the local data structure.
 */
1888
int iwl_mvm_rm_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
J
Johannes Berg 已提交
1889 1890 1891 1892 1893
{
	int ret;

	lockdep_assert_held(&mvm->mutex);

1894 1895 1896
	ret = iwl_mvm_send_rm_bcast_sta(mvm, vif);

	iwl_mvm_dealloc_bcast_sta(mvm, vif);
J
Johannes Berg 已提交
1897 1898 1899 1900

	return ret;
}

1901 1902
#define IWL_MAX_RX_BA_SESSIONS 16

1903
static void iwl_mvm_sync_rxq_del_ba(struct iwl_mvm *mvm, u8 baid)
1904
{
1905 1906 1907 1908
	struct iwl_mvm_delba_notif notif = {
		.metadata.type = IWL_MVM_RXQ_NOTIF_DEL_BA,
		.metadata.sync = 1,
		.delba.baid = baid,
1909
	};
1910 1911
	iwl_mvm_sync_rx_queues_internal(mvm, (void *)&notif, sizeof(notif));
};
1912

1913 1914 1915 1916 1917 1918 1919 1920 1921 1922 1923 1924
static void iwl_mvm_free_reorder(struct iwl_mvm *mvm,
				 struct iwl_mvm_baid_data *data)
{
	int i;

	iwl_mvm_sync_rxq_del_ba(mvm, data->baid);

	for (i = 0; i < mvm->trans->num_rx_queues; i++) {
		int j;
		struct iwl_mvm_reorder_buffer *reorder_buf =
			&data->reorder_buf[i];

1925 1926 1927
		spin_lock_bh(&reorder_buf->lock);
		if (likely(!reorder_buf->num_stored)) {
			spin_unlock_bh(&reorder_buf->lock);
1928
			continue;
1929
		}
1930 1931 1932 1933 1934 1935 1936 1937 1938 1939

		/*
		 * This shouldn't happen in regular DELBA since the internal
		 * delBA notification should trigger a release of all frames in
		 * the reorder buffer.
		 */
		WARN_ON(1);

		for (j = 0; j < reorder_buf->buf_size; j++)
			__skb_queue_purge(&reorder_buf->entries[j]);
1940 1941 1942 1943 1944 1945 1946 1947 1948 1949 1950
		/*
		 * Prevent timer re-arm. This prevents a very far fetched case
		 * where we timed out on the notification. There may be prior
		 * RX frames pending in the RX queue before the notification
		 * that might get processed between now and the actual deletion
		 * and we would re-arm the timer although we are deleting the
		 * reorder buffer.
		 */
		reorder_buf->removed = true;
		spin_unlock_bh(&reorder_buf->lock);
		del_timer_sync(&reorder_buf->reorder_timer);
1951 1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 1966 1967 1968
	}
}

static void iwl_mvm_init_reorder_buffer(struct iwl_mvm *mvm,
					u32 sta_id,
					struct iwl_mvm_baid_data *data,
					u16 ssn, u8 buf_size)
{
	int i;

	for (i = 0; i < mvm->trans->num_rx_queues; i++) {
		struct iwl_mvm_reorder_buffer *reorder_buf =
			&data->reorder_buf[i];
		int j;

		reorder_buf->num_stored = 0;
		reorder_buf->head_sn = ssn;
		reorder_buf->buf_size = buf_size;
1969 1970 1971 1972 1973 1974 1975
		/* rx reorder timer */
		reorder_buf->reorder_timer.function =
			iwl_mvm_reorder_timer_expired;
		reorder_buf->reorder_timer.data = (unsigned long)reorder_buf;
		init_timer(&reorder_buf->reorder_timer);
		spin_lock_init(&reorder_buf->lock);
		reorder_buf->mvm = mvm;
1976 1977 1978 1979 1980
		reorder_buf->queue = i;
		reorder_buf->sta_id = sta_id;
		for (j = 0; j < reorder_buf->buf_size; j++)
			__skb_queue_head_init(&reorder_buf->entries[j]);
	}
1981 1982
}

J
Johannes Berg 已提交
1983
int iwl_mvm_sta_rx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
1984
		       int tid, u16 ssn, bool start, u8 buf_size, u16 timeout)
J
Johannes Berg 已提交
1985
{
1986
	struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
1987
	struct iwl_mvm_add_sta_cmd cmd = {};
1988
	struct iwl_mvm_baid_data *baid_data = NULL;
J
Johannes Berg 已提交
1989 1990 1991 1992 1993
	int ret;
	u32 status;

	lockdep_assert_held(&mvm->mutex);

1994 1995 1996 1997 1998
	if (start && mvm->rx_ba_sessions >= IWL_MAX_RX_BA_SESSIONS) {
		IWL_WARN(mvm, "Not enough RX BA SESSIONS\n");
		return -ENOSPC;
	}

1999 2000 2001 2002 2003
	if (iwl_mvm_has_new_rx_api(mvm) && start) {
		/*
		 * Allocate here so if allocation fails we can bail out early
		 * before starting the BA session in the firmware
		 */
2004 2005 2006 2007
		baid_data = kzalloc(sizeof(*baid_data) +
				    mvm->trans->num_rx_queues *
				    sizeof(baid_data->reorder_buf[0]),
				    GFP_KERNEL);
2008 2009 2010 2011
		if (!baid_data)
			return -ENOMEM;
	}

J
Johannes Berg 已提交
2012 2013 2014
	cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color);
	cmd.sta_id = mvm_sta->sta_id;
	cmd.add_modify = STA_MODE_MODIFY;
2015 2016 2017
	if (start) {
		cmd.add_immediate_ba_tid = (u8) tid;
		cmd.add_immediate_ba_ssn = cpu_to_le16(ssn);
2018
		cmd.rx_ba_window = cpu_to_le16((u16)buf_size);
2019 2020 2021
	} else {
		cmd.remove_immediate_ba_tid = (u8) tid;
	}
J
Johannes Berg 已提交
2022 2023 2024 2025
	cmd.modify_mask = start ? STA_MODIFY_ADD_BA_TID :
				  STA_MODIFY_REMOVE_BA_TID;

	status = ADD_STA_SUCCESS;
2026 2027
	ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
					  iwl_mvm_add_sta_cmd_size(mvm),
2028
					  &cmd, &status);
J
Johannes Berg 已提交
2029
	if (ret)
2030
		goto out_free;
J
Johannes Berg 已提交
2031

2032
	switch (status & IWL_ADD_STA_STATUS_MASK) {
J
Johannes Berg 已提交
2033
	case ADD_STA_SUCCESS:
2034 2035
		IWL_DEBUG_HT(mvm, "RX BA Session %sed in fw\n",
			     start ? "start" : "stopp");
J
Johannes Berg 已提交
2036 2037 2038 2039 2040 2041 2042 2043 2044 2045 2046 2047
		break;
	case ADD_STA_IMMEDIATE_BA_FAILURE:
		IWL_WARN(mvm, "RX BA Session refused by fw\n");
		ret = -ENOSPC;
		break;
	default:
		ret = -EIO;
		IWL_ERR(mvm, "RX BA Session failed %sing, status 0x%x\n",
			start ? "start" : "stopp", status);
		break;
	}

2048 2049 2050 2051 2052 2053 2054 2055 2056 2057 2058 2059 2060 2061 2062 2063 2064 2065 2066 2067
	if (ret)
		goto out_free;

	if (start) {
		u8 baid;

		mvm->rx_ba_sessions++;

		if (!iwl_mvm_has_new_rx_api(mvm))
			return 0;

		if (WARN_ON(!(status & IWL_ADD_STA_BAID_VALID_MASK))) {
			ret = -EINVAL;
			goto out_free;
		}
		baid = (u8)((status & IWL_ADD_STA_BAID_MASK) >>
			    IWL_ADD_STA_BAID_SHIFT);
		baid_data->baid = baid;
		baid_data->timeout = timeout;
		baid_data->last_rx = jiffies;
2068 2069 2070
		setup_timer(&baid_data->session_timer,
			    iwl_mvm_rx_agg_session_expired,
			    (unsigned long)&mvm->baid_map[baid]);
2071 2072 2073 2074 2075 2076 2077 2078 2079
		baid_data->mvm = mvm;
		baid_data->tid = tid;
		baid_data->sta_id = mvm_sta->sta_id;

		mvm_sta->tid_to_baid[tid] = baid;
		if (timeout)
			mod_timer(&baid_data->session_timer,
				  TU_TO_EXP_TIME(timeout * 2));

2080 2081
		iwl_mvm_init_reorder_buffer(mvm, mvm_sta->sta_id,
					    baid_data, ssn, buf_size);
2082 2083 2084 2085 2086 2087
		/*
		 * protect the BA data with RCU to cover a case where our
		 * internal RX sync mechanism will timeout (not that it's
		 * supposed to happen) and we will free the session data while
		 * RX is being processed in parallel
		 */
2088 2089
		IWL_DEBUG_HT(mvm, "Sta %d(%d) is assigned to BAID %d\n",
			     mvm_sta->sta_id, tid, baid);
2090 2091
		WARN_ON(rcu_access_pointer(mvm->baid_map[baid]));
		rcu_assign_pointer(mvm->baid_map[baid], baid_data);
2092
	} else  {
2093 2094
		u8 baid = mvm_sta->tid_to_baid[tid];

2095 2096 2097
		if (mvm->rx_ba_sessions > 0)
			/* check that restart flow didn't zero the counter */
			mvm->rx_ba_sessions--;
2098 2099 2100 2101 2102 2103 2104 2105 2106 2107 2108
		if (!iwl_mvm_has_new_rx_api(mvm))
			return 0;

		if (WARN_ON(baid == IWL_RX_REORDER_DATA_INVALID_BAID))
			return -EINVAL;

		baid_data = rcu_access_pointer(mvm->baid_map[baid]);
		if (WARN_ON(!baid_data))
			return -EINVAL;

		/* synchronize all rx queues so we can safely delete */
2109
		iwl_mvm_free_reorder(mvm, baid_data);
2110 2111 2112
		del_timer_sync(&baid_data->session_timer);
		RCU_INIT_POINTER(mvm->baid_map[baid], NULL);
		kfree_rcu(baid_data, rcu_head);
2113
		IWL_DEBUG_HT(mvm, "BAID %d is free\n", baid);
2114
	}
2115
	return 0;
2116

2117 2118
out_free:
	kfree(baid_data);
J
Johannes Berg 已提交
2119 2120 2121
	return ret;
}

2122 2123
int iwl_mvm_sta_tx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
		       int tid, u8 queue, bool start)
J
Johannes Berg 已提交
2124
{
2125
	struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
2126
	struct iwl_mvm_add_sta_cmd cmd = {};
J
Johannes Berg 已提交
2127 2128 2129 2130 2131 2132 2133 2134 2135
	int ret;
	u32 status;

	lockdep_assert_held(&mvm->mutex);

	if (start) {
		mvm_sta->tfd_queue_msk |= BIT(queue);
		mvm_sta->tid_disable_agg &= ~BIT(tid);
	} else {
2136 2137 2138
		/* In DQA-mode the queue isn't removed on agg termination */
		if (!iwl_mvm_is_dqa_supported(mvm))
			mvm_sta->tfd_queue_msk &= ~BIT(queue);
J
Johannes Berg 已提交
2139 2140 2141 2142 2143 2144 2145 2146 2147 2148 2149
		mvm_sta->tid_disable_agg |= BIT(tid);
	}

	cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color);
	cmd.sta_id = mvm_sta->sta_id;
	cmd.add_modify = STA_MODE_MODIFY;
	cmd.modify_mask = STA_MODIFY_QUEUES | STA_MODIFY_TID_DISABLE_TX;
	cmd.tfd_queue_msk = cpu_to_le32(mvm_sta->tfd_queue_msk);
	cmd.tid_disable_tx = cpu_to_le16(mvm_sta->tid_disable_agg);

	status = ADD_STA_SUCCESS;
2150 2151
	ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
					  iwl_mvm_add_sta_cmd_size(mvm),
2152
					  &cmd, &status);
J
Johannes Berg 已提交
2153 2154 2155
	if (ret)
		return ret;

2156
	switch (status & IWL_ADD_STA_STATUS_MASK) {
J
Johannes Berg 已提交
2157 2158 2159 2160 2161 2162 2163 2164 2165 2166 2167 2168
	case ADD_STA_SUCCESS:
		break;
	default:
		ret = -EIO;
		IWL_ERR(mvm, "TX BA Session failed %sing, status 0x%x\n",
			start ? "start" : "stopp", status);
		break;
	}

	return ret;
}

2169
const u8 tid_to_mac80211_ac[] = {
J
Johannes Berg 已提交
2170 2171 2172 2173 2174 2175 2176 2177
	IEEE80211_AC_BE,
	IEEE80211_AC_BK,
	IEEE80211_AC_BK,
	IEEE80211_AC_BE,
	IEEE80211_AC_VI,
	IEEE80211_AC_VI,
	IEEE80211_AC_VO,
	IEEE80211_AC_VO,
2178
	IEEE80211_AC_VO, /* We treat MGMT as TID 8, which is set as AC_VO */
J
Johannes Berg 已提交
2179 2180
};

2181 2182 2183 2184 2185 2186 2187 2188 2189 2190 2191
static const u8 tid_to_ucode_ac[] = {
	AC_BE,
	AC_BK,
	AC_BK,
	AC_BE,
	AC_VI,
	AC_VI,
	AC_VO,
	AC_VO,
};

J
Johannes Berg 已提交
2192 2193 2194
int iwl_mvm_sta_tx_agg_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
			     struct ieee80211_sta *sta, u16 tid, u16 *ssn)
{
2195
	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
J
Johannes Berg 已提交
2196 2197
	struct iwl_mvm_tid_data *tid_data;
	int txq_id;
2198
	int ret;
J
Johannes Berg 已提交
2199 2200 2201 2202 2203 2204 2205 2206 2207 2208 2209 2210

	if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
		return -EINVAL;

	if (mvmsta->tid_data[tid].state != IWL_AGG_OFF) {
		IWL_ERR(mvm, "Start AGG when state is not IWL_AGG_OFF %d!\n",
			mvmsta->tid_data[tid].state);
		return -ENXIO;
	}

	lockdep_assert_held(&mvm->mutex);

2211 2212 2213 2214 2215 2216 2217 2218 2219
	spin_lock_bh(&mvmsta->lock);

	/* possible race condition - we entered D0i3 while starting agg */
	if (test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status)) {
		spin_unlock_bh(&mvmsta->lock);
		IWL_ERR(mvm, "Entered D0i3 while starting Tx agg\n");
		return -EIO;
	}

2220
	spin_lock(&mvm->queue_info_lock);
2221

2222 2223 2224 2225 2226 2227 2228 2229 2230
	/*
	 * Note the possible cases:
	 *  1. In DQA mode with an enabled TXQ - TXQ needs to become agg'ed
	 *  2. Non-DQA mode: the TXQ hasn't yet been enabled, so find a free
	 *	one and mark it as reserved
	 *  3. In DQA mode, but no traffic yet on this TID: same treatment as in
	 *	non-DQA mode, since the TXQ hasn't yet been allocated
	 */
	txq_id = mvmsta->tid_data[tid].txq_id;
2231 2232 2233 2234 2235 2236 2237 2238
	if (iwl_mvm_is_dqa_supported(mvm) &&
	    unlikely(mvm->queue_info[txq_id].status == IWL_MVM_QUEUE_SHARED)) {
		ret = -ENXIO;
		IWL_DEBUG_TX_QUEUES(mvm,
				    "Can't start tid %d agg on shared queue!\n",
				    tid);
		goto release_locks;
	} else if (!iwl_mvm_is_dqa_supported(mvm) ||
2239
	    mvm->queue_info[txq_id].status != IWL_MVM_QUEUE_READY) {
2240 2241
		txq_id = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id,
						 mvm->first_agg_queue,
2242 2243 2244 2245 2246 2247 2248 2249 2250
						 mvm->last_agg_queue);
		if (txq_id < 0) {
			ret = txq_id;
			IWL_ERR(mvm, "Failed to allocate agg queue\n");
			goto release_locks;
		}

		/* TXQ hasn't yet been enabled, so mark it only as reserved */
		mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_RESERVED;
2251
	}
2252 2253

	spin_unlock(&mvm->queue_info_lock);
J
Johannes Berg 已提交
2254

2255 2256 2257 2258
	IWL_DEBUG_TX_QUEUES(mvm,
			    "AGG for tid %d will be on queue #%d\n",
			    tid, txq_id);

J
Johannes Berg 已提交
2259
	tid_data = &mvmsta->tid_data[tid];
2260
	tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
J
Johannes Berg 已提交
2261 2262 2263 2264 2265 2266 2267 2268 2269 2270 2271 2272 2273 2274 2275
	tid_data->txq_id = txq_id;
	*ssn = tid_data->ssn;

	IWL_DEBUG_TX_QUEUES(mvm,
			    "Start AGG: sta %d tid %d queue %d - ssn = %d, next_recl = %d\n",
			    mvmsta->sta_id, tid, txq_id, tid_data->ssn,
			    tid_data->next_reclaimed);

	if (tid_data->ssn == tid_data->next_reclaimed) {
		tid_data->state = IWL_AGG_STARTING;
		ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
	} else {
		tid_data->state = IWL_EMPTYING_HW_QUEUE_ADDBA;
	}

2276
	ret = 0;
2277
	goto out;
2278 2279

release_locks:
2280 2281
	spin_unlock(&mvm->queue_info_lock);
out:
J
Johannes Berg 已提交
2282 2283
	spin_unlock_bh(&mvmsta->lock);

2284
	return ret;
J
Johannes Berg 已提交
2285 2286 2287
}

int iwl_mvm_sta_tx_agg_oper(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2288 2289
			    struct ieee80211_sta *sta, u16 tid, u8 buf_size,
			    bool amsdu)
J
Johannes Berg 已提交
2290
{
2291
	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
J
Johannes Berg 已提交
2292
	struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
2293 2294
	unsigned int wdg_timeout =
		iwl_mvm_get_wd_timeout(mvm, vif, sta->tdls, false);
2295
	int queue, ret;
2296
	bool alloc_queue = true;
2297
	enum iwl_mvm_queue_status queue_status;
J
Johannes Berg 已提交
2298 2299
	u16 ssn;

2300 2301 2302 2303 2304 2305 2306
	struct iwl_trans_txq_scd_cfg cfg = {
		.sta_id = mvmsta->sta_id,
		.tid = tid,
		.frame_limit = buf_size,
		.aggregate = true,
	};

2307 2308 2309
	BUILD_BUG_ON((sizeof(mvmsta->agg_tids) * BITS_PER_BYTE)
		     != IWL_MAX_TID_COUNT);

J
Johannes Berg 已提交
2310 2311 2312 2313 2314 2315
	buf_size = min_t(int, buf_size, LINK_QUAL_AGG_FRAME_LIMIT_DEF);

	spin_lock_bh(&mvmsta->lock);
	ssn = tid_data->ssn;
	queue = tid_data->txq_id;
	tid_data->state = IWL_AGG_ON;
2316
	mvmsta->agg_tids |= BIT(tid);
J
Johannes Berg 已提交
2317
	tid_data->ssn = 0xffff;
2318
	tid_data->amsdu_in_ampdu_allowed = amsdu;
J
Johannes Berg 已提交
2319 2320
	spin_unlock_bh(&mvmsta->lock);

2321
	cfg.fifo = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]];
J
Johannes Berg 已提交
2322

2323 2324 2325 2326
	spin_lock_bh(&mvm->queue_info_lock);
	queue_status = mvm->queue_info[queue].status;
	spin_unlock_bh(&mvm->queue_info_lock);

2327 2328 2329 2330 2331 2332 2333 2334 2335 2336 2337 2338 2339 2340 2341 2342 2343 2344 2345 2346 2347 2348 2349 2350 2351 2352 2353 2354 2355 2356 2357 2358 2359 2360 2361 2362 2363 2364
	/* In DQA mode, the existing queue might need to be reconfigured */
	if (iwl_mvm_is_dqa_supported(mvm)) {
		/* Maybe there is no need to even alloc a queue... */
		if (mvm->queue_info[queue].status == IWL_MVM_QUEUE_READY)
			alloc_queue = false;

		/*
		 * Only reconfig the SCD for the queue if the window size has
		 * changed from current (become smaller)
		 */
		if (!alloc_queue && buf_size < mvmsta->max_agg_bufsize) {
			/*
			 * If reconfiguring an existing queue, it first must be
			 * drained
			 */
			ret = iwl_trans_wait_tx_queue_empty(mvm->trans,
							    BIT(queue));
			if (ret) {
				IWL_ERR(mvm,
					"Error draining queue before reconfig\n");
				return ret;
			}

			ret = iwl_mvm_reconfig_scd(mvm, queue, cfg.fifo,
						   mvmsta->sta_id, tid,
						   buf_size, ssn);
			if (ret) {
				IWL_ERR(mvm,
					"Error reconfiguring TXQ #%d\n", queue);
				return ret;
			}
		}
	}

	if (alloc_queue)
		iwl_mvm_enable_txq(mvm, queue,
				   vif->hw_queue[tid_to_mac80211_ac[tid]], ssn,
				   &cfg, wdg_timeout);
2365

2366 2367 2368 2369 2370 2371
	/* Send ADD_STA command to enable aggs only if the queue isn't shared */
	if (queue_status != IWL_MVM_QUEUE_SHARED) {
		ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true);
		if (ret)
			return -EIO;
	}
J
Johannes Berg 已提交
2372

2373 2374
	/* No need to mark as reserved */
	spin_lock_bh(&mvm->queue_info_lock);
2375
	mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY;
2376 2377
	spin_unlock_bh(&mvm->queue_info_lock);

J
Johannes Berg 已提交
2378 2379 2380 2381 2382 2383 2384 2385 2386 2387 2388
	/*
	 * Even though in theory the peer could have different
	 * aggregation reorder buffer sizes for different sessions,
	 * our ucode doesn't allow for that and has a global limit
	 * for each station. Therefore, use the minimum of all the
	 * aggregation sessions and our default value.
	 */
	mvmsta->max_agg_bufsize =
		min(mvmsta->max_agg_bufsize, buf_size);
	mvmsta->lq_sta.lq.agg_frame_cnt_limit = mvmsta->max_agg_bufsize;

2389 2390 2391
	IWL_DEBUG_HT(mvm, "Tx aggregation enabled on ra = %pM tid = %d\n",
		     sta->addr, tid);

2392
	return iwl_mvm_send_lq_cmd(mvm, &mvmsta->lq_sta.lq, false);
J
Johannes Berg 已提交
2393 2394 2395 2396 2397
}

int iwl_mvm_sta_tx_agg_stop(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
			    struct ieee80211_sta *sta, u16 tid)
{
2398
	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
J
Johannes Berg 已提交
2399 2400 2401 2402
	struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
	u16 txq_id;
	int err;

2403 2404 2405 2406 2407 2408 2409 2410 2411
	/*
	 * If mac80211 is cleaning its state, then say that we finished since
	 * our state has been cleared anyway.
	 */
	if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
		ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
		return 0;
	}

J
Johannes Berg 已提交
2412 2413 2414 2415 2416 2417 2418
	spin_lock_bh(&mvmsta->lock);

	txq_id = tid_data->txq_id;

	IWL_DEBUG_TX_QUEUES(mvm, "Stop AGG: sta %d tid %d q %d state %d\n",
			    mvmsta->sta_id, tid, txq_id, tid_data->state);

2419 2420
	mvmsta->agg_tids &= ~BIT(tid);

2421
	spin_lock_bh(&mvm->queue_info_lock);
2422 2423 2424 2425 2426 2427 2428 2429 2430
	/*
	 * The TXQ is marked as reserved only if no traffic came through yet
	 * This means no traffic has been sent on this TID (agg'd or not), so
	 * we no longer have use for the queue. Since it hasn't even been
	 * allocated through iwl_mvm_enable_txq, so we can just mark it back as
	 * free.
	 */
	if (mvm->queue_info[txq_id].status == IWL_MVM_QUEUE_RESERVED)
		mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_FREE;
2431

2432 2433
	spin_unlock_bh(&mvm->queue_info_lock);

J
Johannes Berg 已提交
2434 2435
	switch (tid_data->state) {
	case IWL_AGG_ON:
2436
		tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
J
Johannes Berg 已提交
2437 2438 2439 2440 2441 2442 2443 2444 2445 2446 2447 2448 2449

		IWL_DEBUG_TX_QUEUES(mvm,
				    "ssn = %d, next_recl = %d\n",
				    tid_data->ssn, tid_data->next_reclaimed);

		/* There are still packets for this RA / TID in the HW */
		if (tid_data->ssn != tid_data->next_reclaimed) {
			tid_data->state = IWL_EMPTYING_HW_QUEUE_DELBA;
			err = 0;
			break;
		}

		tid_data->ssn = 0xffff;
2450 2451 2452 2453 2454 2455 2456
		tid_data->state = IWL_AGG_OFF;
		spin_unlock_bh(&mvmsta->lock);

		ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);

		iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false);

2457 2458 2459 2460 2461
		if (!iwl_mvm_is_dqa_supported(mvm)) {
			int mac_queue = vif->hw_queue[tid_to_mac80211_ac[tid]];

			iwl_mvm_disable_txq(mvm, txq_id, mac_queue, tid, 0);
		}
2462
		return 0;
J
Johannes Berg 已提交
2463 2464 2465 2466 2467 2468 2469 2470 2471 2472 2473 2474 2475 2476 2477 2478 2479 2480 2481 2482 2483 2484 2485 2486 2487 2488 2489 2490
	case IWL_AGG_STARTING:
	case IWL_EMPTYING_HW_QUEUE_ADDBA:
		/*
		 * The agg session has been stopped before it was set up. This
		 * can happen when the AddBA timer times out for example.
		 */

		/* No barriers since we are under mutex */
		lockdep_assert_held(&mvm->mutex);

		ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
		tid_data->state = IWL_AGG_OFF;
		err = 0;
		break;
	default:
		IWL_ERR(mvm,
			"Stopping AGG while state not ON or starting for %d on %d (%d)\n",
			mvmsta->sta_id, tid, tid_data->state);
		IWL_ERR(mvm,
			"\ttid_data->txq_id = %d\n", tid_data->txq_id);
		err = -EINVAL;
	}

	spin_unlock_bh(&mvmsta->lock);

	return err;
}

2491 2492 2493
int iwl_mvm_sta_tx_agg_flush(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
			    struct ieee80211_sta *sta, u16 tid)
{
2494
	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
2495 2496
	struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
	u16 txq_id;
2497
	enum iwl_mvm_agg_state old_state;
2498 2499 2500 2501 2502 2503 2504 2505 2506

	/*
	 * First set the agg state to OFF to avoid calling
	 * ieee80211_stop_tx_ba_cb in iwl_mvm_check_ratid_empty.
	 */
	spin_lock_bh(&mvmsta->lock);
	txq_id = tid_data->txq_id;
	IWL_DEBUG_TX_QUEUES(mvm, "Flush AGG: sta %d tid %d q %d state %d\n",
			    mvmsta->sta_id, tid, txq_id, tid_data->state);
2507
	old_state = tid_data->state;
2508
	tid_data->state = IWL_AGG_OFF;
2509
	mvmsta->agg_tids &= ~BIT(tid);
2510 2511
	spin_unlock_bh(&mvmsta->lock);

2512
	spin_lock_bh(&mvm->queue_info_lock);
2513 2514 2515 2516 2517 2518 2519 2520 2521
	/*
	 * The TXQ is marked as reserved only if no traffic came through yet
	 * This means no traffic has been sent on this TID (agg'd or not), so
	 * we no longer have use for the queue. Since it hasn't even been
	 * allocated through iwl_mvm_enable_txq, so we can just mark it back as
	 * free.
	 */
	if (mvm->queue_info[txq_id].status == IWL_MVM_QUEUE_RESERVED)
		mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_FREE;
2522 2523
	spin_unlock_bh(&mvm->queue_info_lock);

2524
	if (old_state >= IWL_AGG_ON) {
2525
		iwl_mvm_drain_sta(mvm, mvmsta, true);
2526
		if (iwl_mvm_flush_tx_path(mvm, BIT(txq_id), 0))
2527
			IWL_ERR(mvm, "Couldn't flush the AGG queue\n");
2528 2529 2530
		iwl_trans_wait_tx_queue_empty(mvm->trans,
					      mvmsta->tfd_queue_msk);
		iwl_mvm_drain_sta(mvm, mvmsta, false);
2531

2532 2533
		iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false);

2534 2535 2536 2537 2538 2539
		if (!iwl_mvm_is_dqa_supported(mvm)) {
			int mac_queue = vif->hw_queue[tid_to_mac80211_ac[tid]];

			iwl_mvm_disable_txq(mvm, tid_data->txq_id, mac_queue,
					    tid, 0);
		}
2540
	}
2541 2542 2543 2544

	return 0;
}

J
Johannes Berg 已提交
2545 2546
static int iwl_mvm_set_fw_key_idx(struct iwl_mvm *mvm)
{
2547
	int i, max = -1, max_offs = -1;
J
Johannes Berg 已提交
2548 2549 2550

	lockdep_assert_held(&mvm->mutex);

2551 2552 2553 2554 2555 2556 2557 2558 2559 2560 2561 2562 2563 2564
	/* Pick the unused key offset with the highest 'deleted'
	 * counter. Every time a key is deleted, all the counters
	 * are incremented and the one that was just deleted is
	 * reset to zero. Thus, the highest counter is the one
	 * that was deleted longest ago. Pick that one.
	 */
	for (i = 0; i < STA_KEY_MAX_NUM; i++) {
		if (test_bit(i, mvm->fw_key_table))
			continue;
		if (mvm->fw_key_deleted[i] > max) {
			max = mvm->fw_key_deleted[i];
			max_offs = i;
		}
	}
J
Johannes Berg 已提交
2565

2566
	if (max_offs < 0)
J
Johannes Berg 已提交
2567 2568
		return STA_KEY_IDX_INVALID;

2569
	return max_offs;
J
Johannes Berg 已提交
2570 2571
}

2572 2573 2574
static struct iwl_mvm_sta *iwl_mvm_get_key_sta(struct iwl_mvm *mvm,
					       struct ieee80211_vif *vif,
					       struct ieee80211_sta *sta)
J
Johannes Berg 已提交
2575
{
2576
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
J
Johannes Berg 已提交
2577

2578 2579
	if (sta)
		return iwl_mvm_sta_from_mac80211(sta);
J
Johannes Berg 已提交
2580 2581 2582 2583 2584 2585 2586

	/*
	 * The device expects GTKs for station interfaces to be
	 * installed as GTKs for the AP station. If we have no
	 * station ID, then use AP's station ID.
	 */
	if (vif->type == NL80211_IFTYPE_STATION &&
2587 2588 2589
	    mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT) {
		u8 sta_id = mvmvif->ap_sta_id;

2590 2591 2592
		sta = rcu_dereference_check(mvm->fw_id_to_mac_id[sta_id],
					    lockdep_is_held(&mvm->mutex));

2593 2594 2595 2596 2597
		/*
		 * It is possible that the 'sta' parameter is NULL,
		 * for example when a GTK is removed - the sta_id will then
		 * be the AP ID, and no station was passed by mac80211.
		 */
2598 2599 2600 2601
		if (IS_ERR_OR_NULL(sta))
			return NULL;

		return iwl_mvm_sta_from_mac80211(sta);
2602
	}
J
Johannes Berg 已提交
2603

2604
	return NULL;
J
Johannes Berg 已提交
2605 2606 2607 2608
}

static int iwl_mvm_send_sta_key(struct iwl_mvm *mvm,
				struct iwl_mvm_sta *mvm_sta,
2609
				struct ieee80211_key_conf *keyconf, bool mcast,
2610 2611
				u32 tkip_iv32, u16 *tkip_p1k, u32 cmd_flags,
				u8 key_offset)
J
Johannes Berg 已提交
2612
{
2613
	struct iwl_mvm_add_sta_key_cmd cmd = {};
2614
	__le16 key_flags;
2615 2616
	int ret;
	u32 status;
J
Johannes Berg 已提交
2617 2618
	u16 keyidx;
	int i;
2619
	u8 sta_id = mvm_sta->sta_id;
J
Johannes Berg 已提交
2620 2621 2622 2623 2624 2625 2626 2627 2628

	keyidx = (keyconf->keyidx << STA_KEY_FLG_KEYID_POS) &
		 STA_KEY_FLG_KEYID_MSK;
	key_flags = cpu_to_le16(keyidx);
	key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_KEY_MAP);

	switch (keyconf->cipher) {
	case WLAN_CIPHER_SUITE_TKIP:
		key_flags |= cpu_to_le16(STA_KEY_FLG_TKIP);
2629
		cmd.tkip_rx_tsc_byte2 = tkip_iv32;
J
Johannes Berg 已提交
2630
		for (i = 0; i < 5; i++)
2631 2632
			cmd.tkip_rx_ttak[i] = cpu_to_le16(tkip_p1k[i]);
		memcpy(cmd.key, keyconf->key, keyconf->keylen);
J
Johannes Berg 已提交
2633 2634 2635
		break;
	case WLAN_CIPHER_SUITE_CCMP:
		key_flags |= cpu_to_le16(STA_KEY_FLG_CCM);
2636
		memcpy(cmd.key, keyconf->key, keyconf->keylen);
J
Johannes Berg 已提交
2637
		break;
2638 2639
	case WLAN_CIPHER_SUITE_WEP104:
		key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_13BYTES);
2640
		/* fall through */
2641 2642 2643 2644
	case WLAN_CIPHER_SUITE_WEP40:
		key_flags |= cpu_to_le16(STA_KEY_FLG_WEP);
		memcpy(cmd.key + 3, keyconf->key, keyconf->keylen);
		break;
2645 2646 2647 2648 2649 2650 2651
	case WLAN_CIPHER_SUITE_GCMP_256:
		key_flags |= cpu_to_le16(STA_KEY_FLG_KEY_32BYTES);
		/* fall through */
	case WLAN_CIPHER_SUITE_GCMP:
		key_flags |= cpu_to_le16(STA_KEY_FLG_GCMP);
		memcpy(cmd.key, keyconf->key, keyconf->keylen);
		break;
J
Johannes Berg 已提交
2652
	default:
2653 2654
		key_flags |= cpu_to_le16(STA_KEY_FLG_EXT);
		memcpy(cmd.key, keyconf->key, keyconf->keylen);
J
Johannes Berg 已提交
2655 2656
	}

2657
	if (mcast)
J
Johannes Berg 已提交
2658 2659
		key_flags |= cpu_to_le16(STA_KEY_MULTICAST);

2660
	cmd.key_offset = key_offset;
2661
	cmd.key_flags = key_flags;
J
Johannes Berg 已提交
2662 2663 2664
	cmd.sta_id = sta_id;

	status = ADD_STA_SUCCESS;
E
Emmanuel Grumbach 已提交
2665
	if (cmd_flags & CMD_ASYNC)
2666 2667
		ret =  iwl_mvm_send_cmd_pdu(mvm, ADD_STA_KEY, CMD_ASYNC,
					    sizeof(cmd), &cmd);
E
Emmanuel Grumbach 已提交
2668 2669 2670
	else
		ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, sizeof(cmd),
						  &cmd, &status);
J
Johannes Berg 已提交
2671 2672 2673 2674 2675 2676 2677 2678 2679 2680 2681 2682 2683 2684 2685 2686 2687 2688 2689 2690 2691

	switch (status) {
	case ADD_STA_SUCCESS:
		IWL_DEBUG_WEP(mvm, "MODIFY_STA: set dynamic key passed\n");
		break;
	default:
		ret = -EIO;
		IWL_ERR(mvm, "MODIFY_STA: set dynamic key failed\n");
		break;
	}

	return ret;
}

static int iwl_mvm_send_sta_igtk(struct iwl_mvm *mvm,
				 struct ieee80211_key_conf *keyconf,
				 u8 sta_id, bool remove_key)
{
	struct iwl_mvm_mgmt_mcast_key_cmd igtk_cmd = {};

	/* verify the key details match the required command's expectations */
2692 2693 2694 2695 2696 2697 2698 2699 2700
	if (WARN_ON((keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE) ||
		    (keyconf->keyidx != 4 && keyconf->keyidx != 5) ||
		    (keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC &&
		     keyconf->cipher != WLAN_CIPHER_SUITE_BIP_GMAC_128 &&
		     keyconf->cipher != WLAN_CIPHER_SUITE_BIP_GMAC_256)))
		return -EINVAL;

	if (WARN_ON(!iwl_mvm_has_new_rx_api(mvm) &&
		    keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC))
J
Johannes Berg 已提交
2701 2702 2703 2704 2705 2706 2707 2708 2709 2710 2711
		return -EINVAL;

	igtk_cmd.key_id = cpu_to_le32(keyconf->keyidx);
	igtk_cmd.sta_id = cpu_to_le32(sta_id);

	if (remove_key) {
		igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_NOT_VALID);
	} else {
		struct ieee80211_key_seq seq;
		const u8 *pn;

2712 2713 2714 2715
		switch (keyconf->cipher) {
		case WLAN_CIPHER_SUITE_AES_CMAC:
			igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_FLG_CCM);
			break;
2716 2717 2718 2719
		case WLAN_CIPHER_SUITE_BIP_GMAC_128:
		case WLAN_CIPHER_SUITE_BIP_GMAC_256:
			igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_FLG_GCMP);
			break;
2720 2721 2722 2723
		default:
			return -EINVAL;
		}

2724 2725 2726 2727
		memcpy(igtk_cmd.igtk, keyconf->key, keyconf->keylen);
		if (keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256)
			igtk_cmd.ctrl_flags |=
				cpu_to_le32(STA_KEY_FLG_KEY_32BYTES);
J
Johannes Berg 已提交
2728 2729 2730 2731 2732 2733 2734 2735 2736 2737 2738 2739 2740 2741
		ieee80211_get_key_rx_seq(keyconf, 0, &seq);
		pn = seq.aes_cmac.pn;
		igtk_cmd.receive_seq_cnt = cpu_to_le64(((u64) pn[5] << 0) |
						       ((u64) pn[4] << 8) |
						       ((u64) pn[3] << 16) |
						       ((u64) pn[2] << 24) |
						       ((u64) pn[1] << 32) |
						       ((u64) pn[0] << 40));
	}

	IWL_DEBUG_INFO(mvm, "%s igtk for sta %u\n",
		       remove_key ? "removing" : "installing",
		       igtk_cmd.sta_id);

2742 2743 2744 2745 2746 2747 2748 2749 2750 2751 2752 2753 2754
	if (!iwl_mvm_has_new_rx_api(mvm)) {
		struct iwl_mvm_mgmt_mcast_key_cmd_v1 igtk_cmd_v1 = {
			.ctrl_flags = igtk_cmd.ctrl_flags,
			.key_id = igtk_cmd.key_id,
			.sta_id = igtk_cmd.sta_id,
			.receive_seq_cnt = igtk_cmd.receive_seq_cnt
		};

		memcpy(igtk_cmd_v1.igtk, igtk_cmd.igtk,
		       ARRAY_SIZE(igtk_cmd_v1.igtk));
		return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, 0,
					    sizeof(igtk_cmd_v1), &igtk_cmd_v1);
	}
E
Emmanuel Grumbach 已提交
2755
	return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, 0,
J
Johannes Berg 已提交
2756 2757 2758 2759 2760 2761 2762 2763
				    sizeof(igtk_cmd), &igtk_cmd);
}


static inline u8 *iwl_mvm_get_mac_addr(struct iwl_mvm *mvm,
				       struct ieee80211_vif *vif,
				       struct ieee80211_sta *sta)
{
2764
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
J
Johannes Berg 已提交
2765 2766 2767 2768 2769 2770 2771 2772 2773 2774 2775 2776 2777 2778 2779 2780

	if (sta)
		return sta->addr;

	if (vif->type == NL80211_IFTYPE_STATION &&
	    mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT) {
		u8 sta_id = mvmvif->ap_sta_id;
		sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
						lockdep_is_held(&mvm->mutex));
		return sta->addr;
	}


	return NULL;
}

2781 2782 2783
static int __iwl_mvm_set_sta_key(struct iwl_mvm *mvm,
				 struct ieee80211_vif *vif,
				 struct ieee80211_sta *sta,
2784
				 struct ieee80211_key_conf *keyconf,
2785
				 u8 key_offset,
2786
				 bool mcast)
2787 2788 2789 2790 2791 2792 2793 2794 2795 2796 2797 2798 2799
{
	struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
	int ret;
	const u8 *addr;
	struct ieee80211_key_seq seq;
	u16 p1k[5];

	switch (keyconf->cipher) {
	case WLAN_CIPHER_SUITE_TKIP:
		addr = iwl_mvm_get_mac_addr(mvm, vif, sta);
		/* get phase 1 key from mac80211 */
		ieee80211_get_key_rx_seq(keyconf, 0, &seq);
		ieee80211_get_tkip_rx_p1k(keyconf, addr, seq.tkip.iv32, p1k);
2800
		ret = iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, mcast,
2801
					   seq.tkip.iv32, p1k, 0, key_offset);
2802 2803
		break;
	case WLAN_CIPHER_SUITE_CCMP:
2804 2805
	case WLAN_CIPHER_SUITE_WEP40:
	case WLAN_CIPHER_SUITE_WEP104:
2806 2807
	case WLAN_CIPHER_SUITE_GCMP:
	case WLAN_CIPHER_SUITE_GCMP_256:
2808
		ret = iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, mcast,
2809
					   0, NULL, 0, key_offset);
2810 2811
		break;
	default:
2812
		ret = iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, mcast,
2813
					   0, NULL, 0, key_offset);
2814 2815 2816 2817 2818 2819
	}

	return ret;
}

static int __iwl_mvm_remove_sta_key(struct iwl_mvm *mvm, u8 sta_id,
2820 2821
				    struct ieee80211_key_conf *keyconf,
				    bool mcast)
2822 2823 2824 2825 2826 2827 2828 2829 2830 2831 2832
{
	struct iwl_mvm_add_sta_key_cmd cmd = {};
	__le16 key_flags;
	int ret;
	u32 status;

	key_flags = cpu_to_le16((keyconf->keyidx << STA_KEY_FLG_KEYID_POS) &
				 STA_KEY_FLG_KEYID_MSK);
	key_flags |= cpu_to_le16(STA_KEY_FLG_NO_ENC | STA_KEY_FLG_WEP_KEY_MAP);
	key_flags |= cpu_to_le16(STA_KEY_NOT_VALID);

2833
	if (mcast)
2834 2835 2836 2837 2838 2839 2840 2841 2842 2843 2844 2845 2846 2847 2848 2849 2850 2851 2852 2853 2854 2855 2856
		key_flags |= cpu_to_le16(STA_KEY_MULTICAST);

	cmd.key_flags = key_flags;
	cmd.key_offset = keyconf->hw_key_idx;
	cmd.sta_id = sta_id;

	status = ADD_STA_SUCCESS;
	ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, sizeof(cmd),
					  &cmd, &status);

	switch (status) {
	case ADD_STA_SUCCESS:
		IWL_DEBUG_WEP(mvm, "MODIFY_STA: remove sta key passed\n");
		break;
	default:
		ret = -EIO;
		IWL_ERR(mvm, "MODIFY_STA: remove sta key failed\n");
		break;
	}

	return ret;
}

J
Johannes Berg 已提交
2857 2858 2859 2860
int iwl_mvm_set_sta_key(struct iwl_mvm *mvm,
			struct ieee80211_vif *vif,
			struct ieee80211_sta *sta,
			struct ieee80211_key_conf *keyconf,
2861
			u8 key_offset)
J
Johannes Berg 已提交
2862
{
2863
	bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
2864
	struct iwl_mvm_sta *mvm_sta;
2865
	u8 sta_id;
J
Johannes Berg 已提交
2866
	int ret;
2867
	static const u8 __maybe_unused zero_addr[ETH_ALEN] = {0};
J
Johannes Berg 已提交
2868 2869 2870 2871

	lockdep_assert_held(&mvm->mutex);

	/* Get the station id from the mvm local station table */
2872 2873 2874
	mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta);
	if (!mvm_sta) {
		IWL_ERR(mvm, "Failed to find station\n");
J
Johannes Berg 已提交
2875 2876
		return -EINVAL;
	}
2877
	sta_id = mvm_sta->sta_id;
J
Johannes Berg 已提交
2878

2879 2880 2881
	if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC ||
	    keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_128 ||
	    keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256) {
J
Johannes Berg 已提交
2882 2883 2884 2885 2886 2887 2888 2889 2890 2891 2892 2893 2894 2895 2896 2897 2898
		ret = iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, false);
		goto end;
	}

	/*
	 * It is possible that the 'sta' parameter is NULL, and thus
	 * there is a need to retrieve  the sta from the local station table.
	 */
	if (!sta) {
		sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
						lockdep_is_held(&mvm->mutex));
		if (IS_ERR_OR_NULL(sta)) {
			IWL_ERR(mvm, "Invalid station id\n");
			return -EINVAL;
		}
	}

2899
	if (WARN_ON_ONCE(iwl_mvm_sta_from_mac80211(sta)->vif != vif))
J
Johannes Berg 已提交
2900 2901
		return -EINVAL;

2902 2903 2904 2905 2906 2907 2908 2909 2910 2911 2912 2913 2914 2915
	/* If the key_offset is not pre-assigned, we need to find a
	 * new offset to use.  In normal cases, the offset is not
	 * pre-assigned, but during HW_RESTART we want to reuse the
	 * same indices, so we pass them when this function is called.
	 *
	 * In D3 entry, we need to hardcoded the indices (because the
	 * firmware hardcodes the PTK offset to 0).  In this case, we
	 * need to make sure we don't overwrite the hw_key_idx in the
	 * keyconf structure, because otherwise we cannot configure
	 * the original ones back when resuming.
	 */
	if (key_offset == STA_KEY_IDX_INVALID) {
		key_offset  = iwl_mvm_set_fw_key_idx(mvm);
		if (key_offset == STA_KEY_IDX_INVALID)
J
Johannes Berg 已提交
2916
			return -ENOSPC;
2917
		keyconf->hw_key_idx = key_offset;
J
Johannes Berg 已提交
2918 2919
	}

2920
	ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf, key_offset, mcast);
2921
	if (ret)
2922 2923 2924 2925 2926 2927 2928 2929 2930 2931
		goto end;

	/*
	 * For WEP, the same key is used for multicast and unicast. Upload it
	 * again, using the same key offset, and now pointing the other one
	 * to the same key slot (offset).
	 * If this fails, remove the original as well.
	 */
	if (keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 ||
	    keyconf->cipher == WLAN_CIPHER_SUITE_WEP104) {
2932 2933
		ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf,
					    key_offset, !mcast);
2934 2935
		if (ret) {
			__iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast);
2936
			goto end;
2937 2938
		}
	}
J
Johannes Berg 已提交
2939

2940 2941
	__set_bit(key_offset, mvm->fw_key_table);

J
Johannes Berg 已提交
2942 2943 2944
end:
	IWL_DEBUG_WEP(mvm, "key: cipher=%x len=%d idx=%d sta=%pM ret=%d\n",
		      keyconf->cipher, keyconf->keylen, keyconf->keyidx,
2945
		      sta ? sta->addr : zero_addr, ret);
J
Johannes Berg 已提交
2946 2947 2948 2949 2950 2951 2952 2953
	return ret;
}

int iwl_mvm_remove_sta_key(struct iwl_mvm *mvm,
			   struct ieee80211_vif *vif,
			   struct ieee80211_sta *sta,
			   struct ieee80211_key_conf *keyconf)
{
2954
	bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
2955 2956
	struct iwl_mvm_sta *mvm_sta;
	u8 sta_id = IWL_MVM_STATION_COUNT;
2957
	int ret, i;
J
Johannes Berg 已提交
2958 2959 2960

	lockdep_assert_held(&mvm->mutex);

2961 2962
	/* Get the station from the mvm local station table */
	mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta);
J
Johannes Berg 已提交
2963 2964 2965 2966

	IWL_DEBUG_WEP(mvm, "mvm remove dynamic key: idx=%d sta=%d\n",
		      keyconf->keyidx, sta_id);

2967 2968 2969
	if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC ||
	    keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_128 ||
	    keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256)
J
Johannes Berg 已提交
2970 2971
		return iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, true);

2972
	if (!__test_and_clear_bit(keyconf->hw_key_idx, mvm->fw_key_table)) {
J
Johannes Berg 已提交
2973 2974 2975 2976 2977
		IWL_ERR(mvm, "offset %d not used in fw key table.\n",
			keyconf->hw_key_idx);
		return -ENOENT;
	}

2978 2979 2980 2981 2982 2983 2984
	/* track which key was deleted last */
	for (i = 0; i < STA_KEY_MAX_NUM; i++) {
		if (mvm->fw_key_deleted[i] < U8_MAX)
			mvm->fw_key_deleted[i]++;
	}
	mvm->fw_key_deleted[keyconf->hw_key_idx] = 0;

2985
	if (!mvm_sta) {
J
Johannes Berg 已提交
2986 2987 2988 2989
		IWL_DEBUG_WEP(mvm, "station non-existent, early return.\n");
		return 0;
	}

2990 2991
	sta_id = mvm_sta->sta_id;

2992 2993 2994 2995 2996 2997 2998 2999 3000 3001
	ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast);
	if (ret)
		return ret;

	/* delete WEP key twice to get rid of (now useless) offset */
	if (keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 ||
	    keyconf->cipher == WLAN_CIPHER_SUITE_WEP104)
		ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, !mcast);

	return ret;
J
Johannes Berg 已提交
3002 3003 3004 3005 3006 3007 3008 3009
}

void iwl_mvm_update_tkip_key(struct iwl_mvm *mvm,
			     struct ieee80211_vif *vif,
			     struct ieee80211_key_conf *keyconf,
			     struct ieee80211_sta *sta, u32 iv32,
			     u16 *phase1key)
{
B
Beni Lev 已提交
3010
	struct iwl_mvm_sta *mvm_sta;
3011
	bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
J
Johannes Berg 已提交
3012

B
Beni Lev 已提交
3013 3014
	rcu_read_lock();

3015 3016
	mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta);
	if (WARN_ON_ONCE(!mvm_sta))
3017
		goto unlock;
3018
	iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, mcast,
3019
			     iv32, phase1key, CMD_ASYNC, keyconf->hw_key_idx);
3020 3021

 unlock:
B
Beni Lev 已提交
3022
	rcu_read_unlock();
J
Johannes Berg 已提交
3023 3024
}

3025 3026
void iwl_mvm_sta_modify_ps_wake(struct iwl_mvm *mvm,
				struct ieee80211_sta *sta)
J
Johannes Berg 已提交
3027
{
3028
	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
3029
	struct iwl_mvm_add_sta_cmd cmd = {
J
Johannes Berg 已提交
3030
		.add_modify = STA_MODE_MODIFY,
3031
		.sta_id = mvmsta->sta_id,
3032
		.station_flags_msk = cpu_to_le32(STA_FLG_PS),
3033
		.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
J
Johannes Berg 已提交
3034 3035 3036
	};
	int ret;

3037 3038
	ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC,
				   iwl_mvm_add_sta_cmd_size(mvm), &cmd);
J
Johannes Berg 已提交
3039 3040 3041 3042
	if (ret)
		IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
}

3043 3044
void iwl_mvm_sta_modify_sleep_tx_count(struct iwl_mvm *mvm,
				       struct ieee80211_sta *sta,
J
Johannes Berg 已提交
3045
				       enum ieee80211_frame_release_type reason,
3046 3047
				       u16 cnt, u16 tids, bool more_data,
				       bool agg)
J
Johannes Berg 已提交
3048
{
3049
	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
3050
	struct iwl_mvm_add_sta_cmd cmd = {
J
Johannes Berg 已提交
3051
		.add_modify = STA_MODE_MODIFY,
3052
		.sta_id = mvmsta->sta_id,
J
Johannes Berg 已提交
3053 3054
		.modify_mask = STA_MODIFY_SLEEPING_STA_TX_COUNT,
		.sleep_tx_count = cpu_to_le16(cnt),
3055
		.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
J
Johannes Berg 已提交
3056
	};
3057 3058 3059 3060 3061 3062 3063 3064 3065 3066 3067 3068 3069 3070 3071 3072 3073 3074 3075
	int tid, ret;
	unsigned long _tids = tids;

	/* convert TIDs to ACs - we don't support TSPEC so that's OK
	 * Note that this field is reserved and unused by firmware not
	 * supporting GO uAPSD, so it's safe to always do this.
	 */
	for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT)
		cmd.awake_acs |= BIT(tid_to_ucode_ac[tid]);

	/* If we're releasing frames from aggregation queues then check if the
	 * all queues combined that we're releasing frames from have
	 *  - more frames than the service period, in which case more_data
	 *    needs to be set
	 *  - fewer than 'cnt' frames, in which case we need to adjust the
	 *    firmware command (but do that unconditionally)
	 */
	if (agg) {
		int remaining = cnt;
3076
		int sleep_tx_count;
3077 3078 3079 3080 3081 3082 3083 3084 3085 3086 3087 3088 3089 3090 3091 3092 3093 3094 3095 3096 3097 3098 3099 3100

		spin_lock_bh(&mvmsta->lock);
		for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT) {
			struct iwl_mvm_tid_data *tid_data;
			u16 n_queued;

			tid_data = &mvmsta->tid_data[tid];
			if (WARN(tid_data->state != IWL_AGG_ON &&
				 tid_data->state != IWL_EMPTYING_HW_QUEUE_DELBA,
				 "TID %d state is %d\n",
				 tid, tid_data->state)) {
				spin_unlock_bh(&mvmsta->lock);
				ieee80211_sta_eosp(sta);
				return;
			}

			n_queued = iwl_mvm_tid_queued(tid_data);
			if (n_queued > remaining) {
				more_data = true;
				remaining = 0;
				break;
			}
			remaining -= n_queued;
		}
3101 3102 3103
		sleep_tx_count = cnt - remaining;
		if (reason == IEEE80211_FRAME_RELEASE_UAPSD)
			mvmsta->sleep_tx_count = sleep_tx_count;
3104 3105
		spin_unlock_bh(&mvmsta->lock);

3106
		cmd.sleep_tx_count = cpu_to_le16(sleep_tx_count);
3107 3108 3109 3110 3111 3112 3113 3114 3115 3116 3117 3118 3119 3120 3121 3122
		if (WARN_ON(cnt - remaining == 0)) {
			ieee80211_sta_eosp(sta);
			return;
		}
	}

	/* Note: this is ignored by firmware not supporting GO uAPSD */
	if (more_data)
		cmd.sleep_state_flags |= cpu_to_le16(STA_SLEEP_STATE_MOREDATA);

	if (reason == IEEE80211_FRAME_RELEASE_PSPOLL) {
		mvmsta->next_status_eosp = true;
		cmd.sleep_state_flags |= cpu_to_le16(STA_SLEEP_STATE_PS_POLL);
	} else {
		cmd.sleep_state_flags |= cpu_to_le16(STA_SLEEP_STATE_UAPSD);
	}
J
Johannes Berg 已提交
3123

3124 3125 3126 3127 3128
	/* block the Tx queues until the FW updated the sleep Tx count */
	iwl_trans_block_txq_ptrs(mvm->trans, true);

	ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA,
				   CMD_ASYNC | CMD_WANT_ASYNC_CALLBACK,
3129
				   iwl_mvm_add_sta_cmd_size(mvm), &cmd);
J
Johannes Berg 已提交
3130 3131 3132
	if (ret)
		IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
}
3133

3134 3135
void iwl_mvm_rx_eosp_notif(struct iwl_mvm *mvm,
			   struct iwl_rx_cmd_buffer *rxb)
3136 3137 3138 3139 3140 3141 3142
{
	struct iwl_rx_packet *pkt = rxb_addr(rxb);
	struct iwl_mvm_eosp_notification *notif = (void *)pkt->data;
	struct ieee80211_sta *sta;
	u32 sta_id = le32_to_cpu(notif->sta_id);

	if (WARN_ON_ONCE(sta_id >= IWL_MVM_STATION_COUNT))
3143
		return;
3144 3145 3146 3147 3148 3149 3150

	rcu_read_lock();
	sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
	if (!IS_ERR_OR_NULL(sta))
		ieee80211_sta_eosp(sta);
	rcu_read_unlock();
}
3151 3152 3153 3154 3155 3156 3157 3158 3159 3160 3161 3162 3163

void iwl_mvm_sta_modify_disable_tx(struct iwl_mvm *mvm,
				   struct iwl_mvm_sta *mvmsta, bool disable)
{
	struct iwl_mvm_add_sta_cmd cmd = {
		.add_modify = STA_MODE_MODIFY,
		.sta_id = mvmsta->sta_id,
		.station_flags = disable ? cpu_to_le32(STA_FLG_DISABLE_TX) : 0,
		.station_flags_msk = cpu_to_le32(STA_FLG_DISABLE_TX),
		.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
	};
	int ret;

3164 3165
	ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC,
				   iwl_mvm_add_sta_cmd_size(mvm), &cmd);
3166 3167 3168
	if (ret)
		IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
}
3169 3170 3171 3172 3173 3174 3175 3176 3177 3178 3179 3180 3181 3182 3183 3184 3185

void iwl_mvm_sta_modify_disable_tx_ap(struct iwl_mvm *mvm,
				      struct ieee80211_sta *sta,
				      bool disable)
{
	struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);

	spin_lock_bh(&mvm_sta->lock);

	if (mvm_sta->disable_tx == disable) {
		spin_unlock_bh(&mvm_sta->lock);
		return;
	}

	mvm_sta->disable_tx = disable;

	/*
S
Sara Sharon 已提交
3186 3187
	 * Tell mac80211 to start/stop queuing tx for this station,
	 * but don't stop queuing if there are still pending frames
3188 3189 3190 3191 3192 3193 3194 3195 3196 3197 3198 3199 3200 3201 3202 3203 3204 3205 3206 3207 3208 3209 3210 3211 3212 3213 3214 3215 3216 3217 3218 3219 3220 3221 3222
	 * for this station.
	 */
	if (disable || !atomic_read(&mvm->pending_frames[mvm_sta->sta_id]))
		ieee80211_sta_block_awake(mvm->hw, sta, disable);

	iwl_mvm_sta_modify_disable_tx(mvm, mvm_sta, disable);

	spin_unlock_bh(&mvm_sta->lock);
}

void iwl_mvm_modify_all_sta_disable_tx(struct iwl_mvm *mvm,
				       struct iwl_mvm_vif *mvmvif,
				       bool disable)
{
	struct ieee80211_sta *sta;
	struct iwl_mvm_sta *mvm_sta;
	int i;

	lockdep_assert_held(&mvm->mutex);

	/* Block/unblock all the stations of the given mvmvif */
	for (i = 0; i < IWL_MVM_STATION_COUNT; i++) {
		sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[i],
						lockdep_is_held(&mvm->mutex));
		if (IS_ERR_OR_NULL(sta))
			continue;

		mvm_sta = iwl_mvm_sta_from_mac80211(sta);
		if (mvm_sta->mac_id_n_color !=
		    FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color))
			continue;

		iwl_mvm_sta_modify_disable_tx_ap(mvm, sta, disable);
	}
}
3223 3224 3225 3226 3227 3228 3229 3230 3231 3232 3233 3234 3235 3236 3237

void iwl_mvm_csa_client_absent(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
{
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
	struct iwl_mvm_sta *mvmsta;

	rcu_read_lock();

	mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, mvmvif->ap_sta_id);

	if (!WARN_ON(!mvmsta))
		iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, true);

	rcu_read_unlock();
}