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[mirror_ubuntu-hirsute-kernel.git] / drivers / net / wireless / iwlwifi / mvm / sta.c
1 /******************************************************************************
2 *
3 * This file is provided under a dual BSD/GPLv2 license. When using or
4 * redistributing this file, you may do so under either license.
5 *
6 * GPL LICENSE SUMMARY
7 *
8 * Copyright(c) 2012 - 2015 Intel Corporation. All rights reserved.
9 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of version 2 of the GNU General Public License as
13 * published by the Free Software Foundation.
14 *
15 * This program is distributed in the hope that it will be useful, but
16 * WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
23 * USA
24 *
25 * The full GNU General Public License is included in this distribution
26 * in the file called COPYING.
27 *
28 * Contact Information:
29 * Intel Linux Wireless <ilw@linux.intel.com>
30 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
31 *
32 * BSD LICENSE
33 *
34 * Copyright(c) 2012 - 2015 Intel Corporation. All rights reserved.
35 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
36 * All rights reserved.
37 *
38 * Redistribution and use in source and binary forms, with or without
39 * modification, are permitted provided that the following conditions
40 * are met:
41 *
42 * * Redistributions of source code must retain the above copyright
43 * notice, this list of conditions and the following disclaimer.
44 * * Redistributions in binary form must reproduce the above copyright
45 * notice, this list of conditions and the following disclaimer in
46 * the documentation and/or other materials provided with the
47 * distribution.
48 * * Neither the name Intel Corporation nor the names of its
49 * contributors may be used to endorse or promote products derived
50 * from this software without specific prior written permission.
51 *
52 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
53 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
54 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
55 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
56 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
57 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
58 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
59 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
60 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
61 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
62 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
63 *
64 *****************************************************************************/
65 #include <net/mac80211.h>
66
67 #include "mvm.h"
68 #include "sta.h"
69 #include "rs.h"
70
71 static int iwl_mvm_find_free_sta_id(struct iwl_mvm *mvm,
72 enum nl80211_iftype iftype)
73 {
74 int sta_id;
75 u32 reserved_ids = 0;
76
77 BUILD_BUG_ON(IWL_MVM_STATION_COUNT > 32);
78 WARN_ON_ONCE(test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status));
79
80 lockdep_assert_held(&mvm->mutex);
81
82 /* d0i3/d3 assumes the AP's sta_id (of sta vif) is 0. reserve it. */
83 if (iftype != NL80211_IFTYPE_STATION)
84 reserved_ids = BIT(0);
85
86 /* Don't take rcu_read_lock() since we are protected by mvm->mutex */
87 for (sta_id = 0; sta_id < IWL_MVM_STATION_COUNT; sta_id++) {
88 if (BIT(sta_id) & reserved_ids)
89 continue;
90
91 if (!rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
92 lockdep_is_held(&mvm->mutex)))
93 return sta_id;
94 }
95 return IWL_MVM_STATION_COUNT;
96 }
97
98 /* send station add/update command to firmware */
99 int iwl_mvm_sta_send_to_fw(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
100 bool update)
101 {
102 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
103 struct iwl_mvm_add_sta_cmd add_sta_cmd = {
104 .sta_id = mvm_sta->sta_id,
105 .mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color),
106 .add_modify = update ? 1 : 0,
107 .station_flags_msk = cpu_to_le32(STA_FLG_FAT_EN_MSK |
108 STA_FLG_MIMO_EN_MSK),
109 };
110 int ret;
111 u32 status;
112 u32 agg_size = 0, mpdu_dens = 0;
113
114 if (!update) {
115 add_sta_cmd.tfd_queue_msk = cpu_to_le32(mvm_sta->tfd_queue_msk);
116 memcpy(&add_sta_cmd.addr, sta->addr, ETH_ALEN);
117 }
118
119 switch (sta->bandwidth) {
120 case IEEE80211_STA_RX_BW_160:
121 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_160MHZ);
122 /* fall through */
123 case IEEE80211_STA_RX_BW_80:
124 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_80MHZ);
125 /* fall through */
126 case IEEE80211_STA_RX_BW_40:
127 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_40MHZ);
128 /* fall through */
129 case IEEE80211_STA_RX_BW_20:
130 if (sta->ht_cap.ht_supported)
131 add_sta_cmd.station_flags |=
132 cpu_to_le32(STA_FLG_FAT_EN_20MHZ);
133 break;
134 }
135
136 switch (sta->rx_nss) {
137 case 1:
138 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_SISO);
139 break;
140 case 2:
141 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_MIMO2);
142 break;
143 case 3 ... 8:
144 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_MIMO3);
145 break;
146 }
147
148 switch (sta->smps_mode) {
149 case IEEE80211_SMPS_AUTOMATIC:
150 case IEEE80211_SMPS_NUM_MODES:
151 WARN_ON(1);
152 break;
153 case IEEE80211_SMPS_STATIC:
154 /* override NSS */
155 add_sta_cmd.station_flags &= ~cpu_to_le32(STA_FLG_MIMO_EN_MSK);
156 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_SISO);
157 break;
158 case IEEE80211_SMPS_DYNAMIC:
159 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_RTS_MIMO_PROT);
160 break;
161 case IEEE80211_SMPS_OFF:
162 /* nothing */
163 break;
164 }
165
166 if (sta->ht_cap.ht_supported) {
167 add_sta_cmd.station_flags_msk |=
168 cpu_to_le32(STA_FLG_MAX_AGG_SIZE_MSK |
169 STA_FLG_AGG_MPDU_DENS_MSK);
170
171 mpdu_dens = sta->ht_cap.ampdu_density;
172 }
173
174 if (sta->vht_cap.vht_supported) {
175 agg_size = sta->vht_cap.cap &
176 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK;
177 agg_size >>=
178 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_SHIFT;
179 } else if (sta->ht_cap.ht_supported) {
180 agg_size = sta->ht_cap.ampdu_factor;
181 }
182
183 add_sta_cmd.station_flags |=
184 cpu_to_le32(agg_size << STA_FLG_MAX_AGG_SIZE_SHIFT);
185 add_sta_cmd.station_flags |=
186 cpu_to_le32(mpdu_dens << STA_FLG_AGG_MPDU_DENS_SHIFT);
187
188 status = ADD_STA_SUCCESS;
189 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, sizeof(add_sta_cmd),
190 &add_sta_cmd, &status);
191 if (ret)
192 return ret;
193
194 switch (status) {
195 case ADD_STA_SUCCESS:
196 IWL_DEBUG_ASSOC(mvm, "ADD_STA PASSED\n");
197 break;
198 default:
199 ret = -EIO;
200 IWL_ERR(mvm, "ADD_STA failed\n");
201 break;
202 }
203
204 return ret;
205 }
206
207 static int iwl_mvm_tdls_sta_init(struct iwl_mvm *mvm,
208 struct ieee80211_sta *sta)
209 {
210 unsigned long used_hw_queues;
211 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
212 unsigned int wdg_timeout =
213 iwl_mvm_get_wd_timeout(mvm, NULL, true, false);
214 u32 ac;
215
216 lockdep_assert_held(&mvm->mutex);
217
218 used_hw_queues = iwl_mvm_get_used_hw_queues(mvm, NULL);
219
220 /* Find available queues, and allocate them to the ACs */
221 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
222 u8 queue = find_first_zero_bit(&used_hw_queues,
223 mvm->first_agg_queue);
224
225 if (queue >= mvm->first_agg_queue) {
226 IWL_ERR(mvm, "Failed to allocate STA queue\n");
227 return -EBUSY;
228 }
229
230 __set_bit(queue, &used_hw_queues);
231 mvmsta->hw_queue[ac] = queue;
232 }
233
234 /* Found a place for all queues - enable them */
235 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
236 iwl_mvm_enable_ac_txq(mvm, mvmsta->hw_queue[ac],
237 mvmsta->hw_queue[ac],
238 iwl_mvm_ac_to_tx_fifo[ac], 0,
239 wdg_timeout);
240 mvmsta->tfd_queue_msk |= BIT(mvmsta->hw_queue[ac]);
241 }
242
243 return 0;
244 }
245
246 static void iwl_mvm_tdls_sta_deinit(struct iwl_mvm *mvm,
247 struct ieee80211_sta *sta)
248 {
249 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
250 unsigned long sta_msk;
251 int i;
252
253 lockdep_assert_held(&mvm->mutex);
254
255 /* disable the TDLS STA-specific queues */
256 sta_msk = mvmsta->tfd_queue_msk;
257 for_each_set_bit(i, &sta_msk, sizeof(sta_msk) * BITS_PER_BYTE)
258 iwl_mvm_disable_txq(mvm, i, i, IWL_MAX_TID_COUNT, 0);
259 }
260
261 int iwl_mvm_add_sta(struct iwl_mvm *mvm,
262 struct ieee80211_vif *vif,
263 struct ieee80211_sta *sta)
264 {
265 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
266 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
267 int i, ret, sta_id;
268
269 lockdep_assert_held(&mvm->mutex);
270
271 if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
272 sta_id = iwl_mvm_find_free_sta_id(mvm,
273 ieee80211_vif_type_p2p(vif));
274 else
275 sta_id = mvm_sta->sta_id;
276
277 if (sta_id == IWL_MVM_STATION_COUNT)
278 return -ENOSPC;
279
280 if (vif->type == NL80211_IFTYPE_AP) {
281 mvmvif->ap_assoc_sta_count++;
282 iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
283 }
284
285 spin_lock_init(&mvm_sta->lock);
286
287 mvm_sta->sta_id = sta_id;
288 mvm_sta->mac_id_n_color = FW_CMD_ID_AND_COLOR(mvmvif->id,
289 mvmvif->color);
290 mvm_sta->vif = vif;
291 mvm_sta->max_agg_bufsize = LINK_QUAL_AGG_FRAME_LIMIT_DEF;
292 mvm_sta->tx_protection = 0;
293 mvm_sta->tt_tx_protection = false;
294
295 /* HW restart, don't assume the memory has been zeroed */
296 atomic_set(&mvm->pending_frames[sta_id], 0);
297 mvm_sta->tid_disable_agg = 0xffff; /* No aggs at first */
298 mvm_sta->tfd_queue_msk = 0;
299
300 /* allocate new queues for a TDLS station */
301 if (sta->tdls) {
302 ret = iwl_mvm_tdls_sta_init(mvm, sta);
303 if (ret)
304 return ret;
305 } else {
306 for (i = 0; i < IEEE80211_NUM_ACS; i++)
307 if (vif->hw_queue[i] != IEEE80211_INVAL_HW_QUEUE)
308 mvm_sta->tfd_queue_msk |= BIT(vif->hw_queue[i]);
309 }
310
311 /* for HW restart - reset everything but the sequence number */
312 for (i = 0; i < IWL_MAX_TID_COUNT; i++) {
313 u16 seq = mvm_sta->tid_data[i].seq_number;
314 memset(&mvm_sta->tid_data[i], 0, sizeof(mvm_sta->tid_data[i]));
315 mvm_sta->tid_data[i].seq_number = seq;
316 }
317 mvm_sta->agg_tids = 0;
318
319 ret = iwl_mvm_sta_send_to_fw(mvm, sta, false);
320 if (ret)
321 goto err;
322
323 if (vif->type == NL80211_IFTYPE_STATION) {
324 if (!sta->tdls) {
325 WARN_ON(mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT);
326 mvmvif->ap_sta_id = sta_id;
327 } else {
328 WARN_ON(mvmvif->ap_sta_id == IWL_MVM_STATION_COUNT);
329 }
330 }
331
332 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta_id], sta);
333
334 return 0;
335
336 err:
337 iwl_mvm_tdls_sta_deinit(mvm, sta);
338 return ret;
339 }
340
341 int iwl_mvm_update_sta(struct iwl_mvm *mvm,
342 struct ieee80211_vif *vif,
343 struct ieee80211_sta *sta)
344 {
345 return iwl_mvm_sta_send_to_fw(mvm, sta, true);
346 }
347
348 int iwl_mvm_drain_sta(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta,
349 bool drain)
350 {
351 struct iwl_mvm_add_sta_cmd cmd = {};
352 int ret;
353 u32 status;
354
355 lockdep_assert_held(&mvm->mutex);
356
357 cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color);
358 cmd.sta_id = mvmsta->sta_id;
359 cmd.add_modify = STA_MODE_MODIFY;
360 cmd.station_flags = drain ? cpu_to_le32(STA_FLG_DRAIN_FLOW) : 0;
361 cmd.station_flags_msk = cpu_to_le32(STA_FLG_DRAIN_FLOW);
362
363 status = ADD_STA_SUCCESS;
364 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, sizeof(cmd),
365 &cmd, &status);
366 if (ret)
367 return ret;
368
369 switch (status) {
370 case ADD_STA_SUCCESS:
371 IWL_DEBUG_INFO(mvm, "Frames for staid %d will drained in fw\n",
372 mvmsta->sta_id);
373 break;
374 default:
375 ret = -EIO;
376 IWL_ERR(mvm, "Couldn't drain frames for staid %d\n",
377 mvmsta->sta_id);
378 break;
379 }
380
381 return ret;
382 }
383
384 /*
385 * Remove a station from the FW table. Before sending the command to remove
386 * the station validate that the station is indeed known to the driver (sanity
387 * only).
388 */
389 static int iwl_mvm_rm_sta_common(struct iwl_mvm *mvm, u8 sta_id)
390 {
391 struct ieee80211_sta *sta;
392 struct iwl_mvm_rm_sta_cmd rm_sta_cmd = {
393 .sta_id = sta_id,
394 };
395 int ret;
396
397 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
398 lockdep_is_held(&mvm->mutex));
399
400 /* Note: internal stations are marked as error values */
401 if (!sta) {
402 IWL_ERR(mvm, "Invalid station id\n");
403 return -EINVAL;
404 }
405
406 ret = iwl_mvm_send_cmd_pdu(mvm, REMOVE_STA, 0,
407 sizeof(rm_sta_cmd), &rm_sta_cmd);
408 if (ret) {
409 IWL_ERR(mvm, "Failed to remove station. Id=%d\n", sta_id);
410 return ret;
411 }
412
413 return 0;
414 }
415
416 void iwl_mvm_sta_drained_wk(struct work_struct *wk)
417 {
418 struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm, sta_drained_wk);
419 u8 sta_id;
420
421 /*
422 * The mutex is needed because of the SYNC cmd, but not only: if the
423 * work would run concurrently with iwl_mvm_rm_sta, it would run before
424 * iwl_mvm_rm_sta sets the station as busy, and exit. Then
425 * iwl_mvm_rm_sta would set the station as busy, and nobody will clean
426 * that later.
427 */
428 mutex_lock(&mvm->mutex);
429
430 for_each_set_bit(sta_id, mvm->sta_drained, IWL_MVM_STATION_COUNT) {
431 int ret;
432 struct ieee80211_sta *sta =
433 rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
434 lockdep_is_held(&mvm->mutex));
435
436 /*
437 * This station is in use or RCU-removed; the latter happens in
438 * managed mode, where mac80211 removes the station before we
439 * can remove it from firmware (we can only do that after the
440 * MAC is marked unassociated), and possibly while the deauth
441 * frame to disconnect from the AP is still queued. Then, the
442 * station pointer is -ENOENT when the last skb is reclaimed.
443 */
444 if (!IS_ERR(sta) || PTR_ERR(sta) == -ENOENT)
445 continue;
446
447 if (PTR_ERR(sta) == -EINVAL) {
448 IWL_ERR(mvm, "Drained sta %d, but it is internal?\n",
449 sta_id);
450 continue;
451 }
452
453 if (!sta) {
454 IWL_ERR(mvm, "Drained sta %d, but it was NULL?\n",
455 sta_id);
456 continue;
457 }
458
459 WARN_ON(PTR_ERR(sta) != -EBUSY);
460 /* This station was removed and we waited until it got drained,
461 * we can now proceed and remove it.
462 */
463 ret = iwl_mvm_rm_sta_common(mvm, sta_id);
464 if (ret) {
465 IWL_ERR(mvm,
466 "Couldn't remove sta %d after it was drained\n",
467 sta_id);
468 continue;
469 }
470 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta_id], NULL);
471 clear_bit(sta_id, mvm->sta_drained);
472
473 if (mvm->tfd_drained[sta_id]) {
474 unsigned long i, msk = mvm->tfd_drained[sta_id];
475
476 for_each_set_bit(i, &msk, sizeof(msk) * BITS_PER_BYTE)
477 iwl_mvm_disable_txq(mvm, i, i,
478 IWL_MAX_TID_COUNT, 0);
479
480 mvm->tfd_drained[sta_id] = 0;
481 IWL_DEBUG_TDLS(mvm, "Drained sta %d, with queues %ld\n",
482 sta_id, msk);
483 }
484 }
485
486 mutex_unlock(&mvm->mutex);
487 }
488
489 int iwl_mvm_rm_sta(struct iwl_mvm *mvm,
490 struct ieee80211_vif *vif,
491 struct ieee80211_sta *sta)
492 {
493 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
494 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
495 int ret;
496
497 lockdep_assert_held(&mvm->mutex);
498
499 if (vif->type == NL80211_IFTYPE_STATION &&
500 mvmvif->ap_sta_id == mvm_sta->sta_id) {
501 ret = iwl_mvm_drain_sta(mvm, mvm_sta, true);
502 if (ret)
503 return ret;
504 /* flush its queues here since we are freeing mvm_sta */
505 ret = iwl_mvm_flush_tx_path(mvm, mvm_sta->tfd_queue_msk, 0);
506 if (ret)
507 return ret;
508 ret = iwl_trans_wait_tx_queue_empty(mvm->trans,
509 mvm_sta->tfd_queue_msk);
510 if (ret)
511 return ret;
512 ret = iwl_mvm_drain_sta(mvm, mvm_sta, false);
513
514 /* if we are associated - we can't remove the AP STA now */
515 if (vif->bss_conf.assoc)
516 return ret;
517
518 /* unassoc - go ahead - remove the AP STA now */
519 mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
520
521 /* clear d0i3_ap_sta_id if no longer relevant */
522 if (mvm->d0i3_ap_sta_id == mvm_sta->sta_id)
523 mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
524 }
525
526 /*
527 * This shouldn't happen - the TDLS channel switch should be canceled
528 * before the STA is removed.
529 */
530 if (WARN_ON_ONCE(mvm->tdls_cs.peer.sta_id == mvm_sta->sta_id)) {
531 mvm->tdls_cs.peer.sta_id = IWL_MVM_STATION_COUNT;
532 cancel_delayed_work(&mvm->tdls_cs.dwork);
533 }
534
535 /*
536 * Make sure that the tx response code sees the station as -EBUSY and
537 * calls the drain worker.
538 */
539 spin_lock_bh(&mvm_sta->lock);
540 /*
541 * There are frames pending on the AC queues for this station.
542 * We need to wait until all the frames are drained...
543 */
544 if (atomic_read(&mvm->pending_frames[mvm_sta->sta_id])) {
545 rcu_assign_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id],
546 ERR_PTR(-EBUSY));
547 spin_unlock_bh(&mvm_sta->lock);
548
549 /* disable TDLS sta queues on drain complete */
550 if (sta->tdls) {
551 mvm->tfd_drained[mvm_sta->sta_id] =
552 mvm_sta->tfd_queue_msk;
553 IWL_DEBUG_TDLS(mvm, "Draining TDLS sta %d\n",
554 mvm_sta->sta_id);
555 }
556
557 ret = iwl_mvm_drain_sta(mvm, mvm_sta, true);
558 } else {
559 spin_unlock_bh(&mvm_sta->lock);
560
561 if (sta->tdls)
562 iwl_mvm_tdls_sta_deinit(mvm, sta);
563
564 ret = iwl_mvm_rm_sta_common(mvm, mvm_sta->sta_id);
565 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[mvm_sta->sta_id], NULL);
566 }
567
568 return ret;
569 }
570
571 int iwl_mvm_rm_sta_id(struct iwl_mvm *mvm,
572 struct ieee80211_vif *vif,
573 u8 sta_id)
574 {
575 int ret = iwl_mvm_rm_sta_common(mvm, sta_id);
576
577 lockdep_assert_held(&mvm->mutex);
578
579 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta_id], NULL);
580 return ret;
581 }
582
583 static int iwl_mvm_allocate_int_sta(struct iwl_mvm *mvm,
584 struct iwl_mvm_int_sta *sta,
585 u32 qmask, enum nl80211_iftype iftype)
586 {
587 if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
588 sta->sta_id = iwl_mvm_find_free_sta_id(mvm, iftype);
589 if (WARN_ON_ONCE(sta->sta_id == IWL_MVM_STATION_COUNT))
590 return -ENOSPC;
591 }
592
593 sta->tfd_queue_msk = qmask;
594
595 /* put a non-NULL value so iterating over the stations won't stop */
596 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta->sta_id], ERR_PTR(-EINVAL));
597 return 0;
598 }
599
600 static void iwl_mvm_dealloc_int_sta(struct iwl_mvm *mvm,
601 struct iwl_mvm_int_sta *sta)
602 {
603 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta->sta_id], NULL);
604 memset(sta, 0, sizeof(struct iwl_mvm_int_sta));
605 sta->sta_id = IWL_MVM_STATION_COUNT;
606 }
607
608 static int iwl_mvm_add_int_sta_common(struct iwl_mvm *mvm,
609 struct iwl_mvm_int_sta *sta,
610 const u8 *addr,
611 u16 mac_id, u16 color)
612 {
613 struct iwl_mvm_add_sta_cmd cmd;
614 int ret;
615 u32 status;
616
617 lockdep_assert_held(&mvm->mutex);
618
619 memset(&cmd, 0, sizeof(cmd));
620 cmd.sta_id = sta->sta_id;
621 cmd.mac_id_n_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(mac_id,
622 color));
623
624 cmd.tfd_queue_msk = cpu_to_le32(sta->tfd_queue_msk);
625
626 if (addr)
627 memcpy(cmd.addr, addr, ETH_ALEN);
628
629 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, sizeof(cmd),
630 &cmd, &status);
631 if (ret)
632 return ret;
633
634 switch (status) {
635 case ADD_STA_SUCCESS:
636 IWL_DEBUG_INFO(mvm, "Internal station added.\n");
637 return 0;
638 default:
639 ret = -EIO;
640 IWL_ERR(mvm, "Add internal station failed, status=0x%x\n",
641 status);
642 break;
643 }
644 return ret;
645 }
646
647 int iwl_mvm_add_aux_sta(struct iwl_mvm *mvm)
648 {
649 unsigned int wdg_timeout = iwlmvm_mod_params.tfd_q_hang_detect ?
650 mvm->cfg->base_params->wd_timeout :
651 IWL_WATCHDOG_DISABLED;
652 int ret;
653
654 lockdep_assert_held(&mvm->mutex);
655
656 /* Map Aux queue to fifo - needs to happen before adding Aux station */
657 iwl_mvm_enable_ac_txq(mvm, mvm->aux_queue, mvm->aux_queue,
658 IWL_MVM_TX_FIFO_MCAST, 0, wdg_timeout);
659
660 /* Allocate aux station and assign to it the aux queue */
661 ret = iwl_mvm_allocate_int_sta(mvm, &mvm->aux_sta, BIT(mvm->aux_queue),
662 NL80211_IFTYPE_UNSPECIFIED);
663 if (ret)
664 return ret;
665
666 ret = iwl_mvm_add_int_sta_common(mvm, &mvm->aux_sta, NULL,
667 MAC_INDEX_AUX, 0);
668
669 if (ret)
670 iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta);
671 return ret;
672 }
673
674 void iwl_mvm_del_aux_sta(struct iwl_mvm *mvm)
675 {
676 lockdep_assert_held(&mvm->mutex);
677
678 iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta);
679 }
680
681 /*
682 * Send the add station command for the vif's broadcast station.
683 * Assumes that the station was already allocated.
684 *
685 * @mvm: the mvm component
686 * @vif: the interface to which the broadcast station is added
687 * @bsta: the broadcast station to add.
688 */
689 int iwl_mvm_send_add_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
690 {
691 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
692 struct iwl_mvm_int_sta *bsta = &mvmvif->bcast_sta;
693 static const u8 _baddr[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
694 const u8 *baddr = _baddr;
695
696 lockdep_assert_held(&mvm->mutex);
697
698 if (vif->type == NL80211_IFTYPE_ADHOC)
699 baddr = vif->bss_conf.bssid;
700
701 if (WARN_ON_ONCE(bsta->sta_id == IWL_MVM_STATION_COUNT))
702 return -ENOSPC;
703
704 return iwl_mvm_add_int_sta_common(mvm, bsta, baddr,
705 mvmvif->id, mvmvif->color);
706 }
707
708 /* Send the FW a request to remove the station from it's internal data
709 * structures, but DO NOT remove the entry from the local data structures. */
710 int iwl_mvm_send_rm_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
711 {
712 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
713 int ret;
714
715 lockdep_assert_held(&mvm->mutex);
716
717 ret = iwl_mvm_rm_sta_common(mvm, mvmvif->bcast_sta.sta_id);
718 if (ret)
719 IWL_WARN(mvm, "Failed sending remove station\n");
720 return ret;
721 }
722
723 int iwl_mvm_alloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
724 {
725 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
726 u32 qmask;
727
728 lockdep_assert_held(&mvm->mutex);
729
730 qmask = iwl_mvm_mac_get_queues_mask(vif);
731
732 /*
733 * The firmware defines the TFD queue mask to only be relevant
734 * for *unicast* queues, so the multicast (CAB) queue shouldn't
735 * be included.
736 */
737 if (vif->type == NL80211_IFTYPE_AP)
738 qmask &= ~BIT(vif->cab_queue);
739
740 return iwl_mvm_allocate_int_sta(mvm, &mvmvif->bcast_sta, qmask,
741 ieee80211_vif_type_p2p(vif));
742 }
743
744 /* Allocate a new station entry for the broadcast station to the given vif,
745 * and send it to the FW.
746 * Note that each P2P mac should have its own broadcast station.
747 *
748 * @mvm: the mvm component
749 * @vif: the interface to which the broadcast station is added
750 * @bsta: the broadcast station to add. */
751 int iwl_mvm_add_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
752 {
753 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
754 struct iwl_mvm_int_sta *bsta = &mvmvif->bcast_sta;
755 int ret;
756
757 lockdep_assert_held(&mvm->mutex);
758
759 ret = iwl_mvm_alloc_bcast_sta(mvm, vif);
760 if (ret)
761 return ret;
762
763 ret = iwl_mvm_send_add_bcast_sta(mvm, vif);
764
765 if (ret)
766 iwl_mvm_dealloc_int_sta(mvm, bsta);
767
768 return ret;
769 }
770
771 void iwl_mvm_dealloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
772 {
773 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
774
775 iwl_mvm_dealloc_int_sta(mvm, &mvmvif->bcast_sta);
776 }
777
778 /*
779 * Send the FW a request to remove the station from it's internal data
780 * structures, and in addition remove it from the local data structure.
781 */
782 int iwl_mvm_rm_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
783 {
784 int ret;
785
786 lockdep_assert_held(&mvm->mutex);
787
788 ret = iwl_mvm_send_rm_bcast_sta(mvm, vif);
789
790 iwl_mvm_dealloc_bcast_sta(mvm, vif);
791
792 return ret;
793 }
794
795 #define IWL_MAX_RX_BA_SESSIONS 16
796
797 int iwl_mvm_sta_rx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
798 int tid, u16 ssn, bool start)
799 {
800 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
801 struct iwl_mvm_add_sta_cmd cmd = {};
802 int ret;
803 u32 status;
804
805 lockdep_assert_held(&mvm->mutex);
806
807 if (start && mvm->rx_ba_sessions >= IWL_MAX_RX_BA_SESSIONS) {
808 IWL_WARN(mvm, "Not enough RX BA SESSIONS\n");
809 return -ENOSPC;
810 }
811
812 cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color);
813 cmd.sta_id = mvm_sta->sta_id;
814 cmd.add_modify = STA_MODE_MODIFY;
815 if (start) {
816 cmd.add_immediate_ba_tid = (u8) tid;
817 cmd.add_immediate_ba_ssn = cpu_to_le16(ssn);
818 } else {
819 cmd.remove_immediate_ba_tid = (u8) tid;
820 }
821 cmd.modify_mask = start ? STA_MODIFY_ADD_BA_TID :
822 STA_MODIFY_REMOVE_BA_TID;
823
824 status = ADD_STA_SUCCESS;
825 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, sizeof(cmd),
826 &cmd, &status);
827 if (ret)
828 return ret;
829
830 switch (status) {
831 case ADD_STA_SUCCESS:
832 IWL_DEBUG_INFO(mvm, "RX BA Session %sed in fw\n",
833 start ? "start" : "stopp");
834 break;
835 case ADD_STA_IMMEDIATE_BA_FAILURE:
836 IWL_WARN(mvm, "RX BA Session refused by fw\n");
837 ret = -ENOSPC;
838 break;
839 default:
840 ret = -EIO;
841 IWL_ERR(mvm, "RX BA Session failed %sing, status 0x%x\n",
842 start ? "start" : "stopp", status);
843 break;
844 }
845
846 if (!ret) {
847 if (start)
848 mvm->rx_ba_sessions++;
849 else if (mvm->rx_ba_sessions > 0)
850 /* check that restart flow didn't zero the counter */
851 mvm->rx_ba_sessions--;
852 }
853
854 return ret;
855 }
856
857 static int iwl_mvm_sta_tx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
858 int tid, u8 queue, bool start)
859 {
860 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
861 struct iwl_mvm_add_sta_cmd cmd = {};
862 int ret;
863 u32 status;
864
865 lockdep_assert_held(&mvm->mutex);
866
867 if (start) {
868 mvm_sta->tfd_queue_msk |= BIT(queue);
869 mvm_sta->tid_disable_agg &= ~BIT(tid);
870 } else {
871 mvm_sta->tfd_queue_msk &= ~BIT(queue);
872 mvm_sta->tid_disable_agg |= BIT(tid);
873 }
874
875 cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color);
876 cmd.sta_id = mvm_sta->sta_id;
877 cmd.add_modify = STA_MODE_MODIFY;
878 cmd.modify_mask = STA_MODIFY_QUEUES | STA_MODIFY_TID_DISABLE_TX;
879 cmd.tfd_queue_msk = cpu_to_le32(mvm_sta->tfd_queue_msk);
880 cmd.tid_disable_tx = cpu_to_le16(mvm_sta->tid_disable_agg);
881
882 status = ADD_STA_SUCCESS;
883 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, sizeof(cmd),
884 &cmd, &status);
885 if (ret)
886 return ret;
887
888 switch (status) {
889 case ADD_STA_SUCCESS:
890 break;
891 default:
892 ret = -EIO;
893 IWL_ERR(mvm, "TX BA Session failed %sing, status 0x%x\n",
894 start ? "start" : "stopp", status);
895 break;
896 }
897
898 return ret;
899 }
900
901 const u8 tid_to_mac80211_ac[] = {
902 IEEE80211_AC_BE,
903 IEEE80211_AC_BK,
904 IEEE80211_AC_BK,
905 IEEE80211_AC_BE,
906 IEEE80211_AC_VI,
907 IEEE80211_AC_VI,
908 IEEE80211_AC_VO,
909 IEEE80211_AC_VO,
910 };
911
912 static const u8 tid_to_ucode_ac[] = {
913 AC_BE,
914 AC_BK,
915 AC_BK,
916 AC_BE,
917 AC_VI,
918 AC_VI,
919 AC_VO,
920 AC_VO,
921 };
922
923 int iwl_mvm_sta_tx_agg_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
924 struct ieee80211_sta *sta, u16 tid, u16 *ssn)
925 {
926 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
927 struct iwl_mvm_tid_data *tid_data;
928 int txq_id;
929 int ret;
930
931 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
932 return -EINVAL;
933
934 if (mvmsta->tid_data[tid].state != IWL_AGG_OFF) {
935 IWL_ERR(mvm, "Start AGG when state is not IWL_AGG_OFF %d!\n",
936 mvmsta->tid_data[tid].state);
937 return -ENXIO;
938 }
939
940 lockdep_assert_held(&mvm->mutex);
941
942 spin_lock_bh(&mvmsta->lock);
943
944 /* possible race condition - we entered D0i3 while starting agg */
945 if (test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status)) {
946 spin_unlock_bh(&mvmsta->lock);
947 IWL_ERR(mvm, "Entered D0i3 while starting Tx agg\n");
948 return -EIO;
949 }
950
951 spin_lock_bh(&mvm->queue_info_lock);
952
953 txq_id = iwl_mvm_find_free_queue(mvm, mvm->first_agg_queue,
954 mvm->last_agg_queue);
955 if (txq_id < 0) {
956 ret = txq_id;
957 spin_unlock_bh(&mvm->queue_info_lock);
958 IWL_ERR(mvm, "Failed to allocate agg queue\n");
959 goto release_locks;
960 }
961 mvm->queue_info[txq_id].setup_reserved = true;
962 spin_unlock_bh(&mvm->queue_info_lock);
963
964 tid_data = &mvmsta->tid_data[tid];
965 tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
966 tid_data->txq_id = txq_id;
967 *ssn = tid_data->ssn;
968
969 IWL_DEBUG_TX_QUEUES(mvm,
970 "Start AGG: sta %d tid %d queue %d - ssn = %d, next_recl = %d\n",
971 mvmsta->sta_id, tid, txq_id, tid_data->ssn,
972 tid_data->next_reclaimed);
973
974 if (tid_data->ssn == tid_data->next_reclaimed) {
975 tid_data->state = IWL_AGG_STARTING;
976 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
977 } else {
978 tid_data->state = IWL_EMPTYING_HW_QUEUE_ADDBA;
979 }
980
981 ret = 0;
982
983 release_locks:
984 spin_unlock_bh(&mvmsta->lock);
985
986 return ret;
987 }
988
989 int iwl_mvm_sta_tx_agg_oper(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
990 struct ieee80211_sta *sta, u16 tid, u8 buf_size)
991 {
992 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
993 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
994 unsigned int wdg_timeout =
995 iwl_mvm_get_wd_timeout(mvm, vif, sta->tdls, false);
996 int queue, fifo, ret;
997 u16 ssn;
998
999 BUILD_BUG_ON((sizeof(mvmsta->agg_tids) * BITS_PER_BYTE)
1000 != IWL_MAX_TID_COUNT);
1001
1002 buf_size = min_t(int, buf_size, LINK_QUAL_AGG_FRAME_LIMIT_DEF);
1003
1004 spin_lock_bh(&mvmsta->lock);
1005 ssn = tid_data->ssn;
1006 queue = tid_data->txq_id;
1007 tid_data->state = IWL_AGG_ON;
1008 mvmsta->agg_tids |= BIT(tid);
1009 tid_data->ssn = 0xffff;
1010 spin_unlock_bh(&mvmsta->lock);
1011
1012 fifo = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]];
1013
1014 iwl_mvm_enable_agg_txq(mvm, queue,
1015 vif->hw_queue[tid_to_mac80211_ac[tid]], fifo,
1016 mvmsta->sta_id, tid, buf_size, ssn, wdg_timeout);
1017
1018 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true);
1019 if (ret)
1020 return -EIO;
1021
1022 /* No need to mark as reserved */
1023 spin_lock_bh(&mvm->queue_info_lock);
1024 mvm->queue_info[queue].setup_reserved = false;
1025 spin_unlock_bh(&mvm->queue_info_lock);
1026
1027 /*
1028 * Even though in theory the peer could have different
1029 * aggregation reorder buffer sizes for different sessions,
1030 * our ucode doesn't allow for that and has a global limit
1031 * for each station. Therefore, use the minimum of all the
1032 * aggregation sessions and our default value.
1033 */
1034 mvmsta->max_agg_bufsize =
1035 min(mvmsta->max_agg_bufsize, buf_size);
1036 mvmsta->lq_sta.lq.agg_frame_cnt_limit = mvmsta->max_agg_bufsize;
1037
1038 IWL_DEBUG_HT(mvm, "Tx aggregation enabled on ra = %pM tid = %d\n",
1039 sta->addr, tid);
1040
1041 return iwl_mvm_send_lq_cmd(mvm, &mvmsta->lq_sta.lq, false);
1042 }
1043
1044 int iwl_mvm_sta_tx_agg_stop(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1045 struct ieee80211_sta *sta, u16 tid)
1046 {
1047 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1048 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
1049 u16 txq_id;
1050 int err;
1051
1052
1053 /*
1054 * If mac80211 is cleaning its state, then say that we finished since
1055 * our state has been cleared anyway.
1056 */
1057 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
1058 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1059 return 0;
1060 }
1061
1062 spin_lock_bh(&mvmsta->lock);
1063
1064 txq_id = tid_data->txq_id;
1065
1066 IWL_DEBUG_TX_QUEUES(mvm, "Stop AGG: sta %d tid %d q %d state %d\n",
1067 mvmsta->sta_id, tid, txq_id, tid_data->state);
1068
1069 mvmsta->agg_tids &= ~BIT(tid);
1070
1071 /* No need to mark as reserved anymore */
1072 spin_lock_bh(&mvm->queue_info_lock);
1073 mvm->queue_info[txq_id].setup_reserved = false;
1074 spin_unlock_bh(&mvm->queue_info_lock);
1075
1076 switch (tid_data->state) {
1077 case IWL_AGG_ON:
1078 tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
1079
1080 IWL_DEBUG_TX_QUEUES(mvm,
1081 "ssn = %d, next_recl = %d\n",
1082 tid_data->ssn, tid_data->next_reclaimed);
1083
1084 /* There are still packets for this RA / TID in the HW */
1085 if (tid_data->ssn != tid_data->next_reclaimed) {
1086 tid_data->state = IWL_EMPTYING_HW_QUEUE_DELBA;
1087 err = 0;
1088 break;
1089 }
1090
1091 tid_data->ssn = 0xffff;
1092 tid_data->state = IWL_AGG_OFF;
1093 spin_unlock_bh(&mvmsta->lock);
1094
1095 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1096
1097 iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false);
1098
1099 iwl_mvm_disable_txq(mvm, txq_id,
1100 vif->hw_queue[tid_to_mac80211_ac[tid]], tid,
1101 0);
1102 return 0;
1103 case IWL_AGG_STARTING:
1104 case IWL_EMPTYING_HW_QUEUE_ADDBA:
1105 /*
1106 * The agg session has been stopped before it was set up. This
1107 * can happen when the AddBA timer times out for example.
1108 */
1109
1110 /* No barriers since we are under mutex */
1111 lockdep_assert_held(&mvm->mutex);
1112
1113 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1114 tid_data->state = IWL_AGG_OFF;
1115 err = 0;
1116 break;
1117 default:
1118 IWL_ERR(mvm,
1119 "Stopping AGG while state not ON or starting for %d on %d (%d)\n",
1120 mvmsta->sta_id, tid, tid_data->state);
1121 IWL_ERR(mvm,
1122 "\ttid_data->txq_id = %d\n", tid_data->txq_id);
1123 err = -EINVAL;
1124 }
1125
1126 spin_unlock_bh(&mvmsta->lock);
1127
1128 return err;
1129 }
1130
1131 int iwl_mvm_sta_tx_agg_flush(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1132 struct ieee80211_sta *sta, u16 tid)
1133 {
1134 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1135 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
1136 u16 txq_id;
1137 enum iwl_mvm_agg_state old_state;
1138
1139 /*
1140 * First set the agg state to OFF to avoid calling
1141 * ieee80211_stop_tx_ba_cb in iwl_mvm_check_ratid_empty.
1142 */
1143 spin_lock_bh(&mvmsta->lock);
1144 txq_id = tid_data->txq_id;
1145 IWL_DEBUG_TX_QUEUES(mvm, "Flush AGG: sta %d tid %d q %d state %d\n",
1146 mvmsta->sta_id, tid, txq_id, tid_data->state);
1147 old_state = tid_data->state;
1148 tid_data->state = IWL_AGG_OFF;
1149 mvmsta->agg_tids &= ~BIT(tid);
1150 spin_unlock_bh(&mvmsta->lock);
1151
1152 /* No need to mark as reserved */
1153 spin_lock_bh(&mvm->queue_info_lock);
1154 mvm->queue_info[txq_id].setup_reserved = false;
1155 spin_unlock_bh(&mvm->queue_info_lock);
1156
1157 if (old_state >= IWL_AGG_ON) {
1158 iwl_mvm_drain_sta(mvm, mvmsta, true);
1159 if (iwl_mvm_flush_tx_path(mvm, BIT(txq_id), 0))
1160 IWL_ERR(mvm, "Couldn't flush the AGG queue\n");
1161 iwl_trans_wait_tx_queue_empty(mvm->trans,
1162 mvmsta->tfd_queue_msk);
1163 iwl_mvm_drain_sta(mvm, mvmsta, false);
1164
1165 iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false);
1166
1167 iwl_mvm_disable_txq(mvm, tid_data->txq_id,
1168 vif->hw_queue[tid_to_mac80211_ac[tid]], tid,
1169 0);
1170 }
1171
1172 return 0;
1173 }
1174
1175 static int iwl_mvm_set_fw_key_idx(struct iwl_mvm *mvm)
1176 {
1177 int i, max = -1, max_offs = -1;
1178
1179 lockdep_assert_held(&mvm->mutex);
1180
1181 /* Pick the unused key offset with the highest 'deleted'
1182 * counter. Every time a key is deleted, all the counters
1183 * are incremented and the one that was just deleted is
1184 * reset to zero. Thus, the highest counter is the one
1185 * that was deleted longest ago. Pick that one.
1186 */
1187 for (i = 0; i < STA_KEY_MAX_NUM; i++) {
1188 if (test_bit(i, mvm->fw_key_table))
1189 continue;
1190 if (mvm->fw_key_deleted[i] > max) {
1191 max = mvm->fw_key_deleted[i];
1192 max_offs = i;
1193 }
1194 }
1195
1196 if (max_offs < 0)
1197 return STA_KEY_IDX_INVALID;
1198
1199 __set_bit(max_offs, mvm->fw_key_table);
1200
1201 return max_offs;
1202 }
1203
1204 static u8 iwl_mvm_get_key_sta_id(struct iwl_mvm *mvm,
1205 struct ieee80211_vif *vif,
1206 struct ieee80211_sta *sta)
1207 {
1208 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1209
1210 if (sta) {
1211 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
1212
1213 return mvm_sta->sta_id;
1214 }
1215
1216 /*
1217 * The device expects GTKs for station interfaces to be
1218 * installed as GTKs for the AP station. If we have no
1219 * station ID, then use AP's station ID.
1220 */
1221 if (vif->type == NL80211_IFTYPE_STATION &&
1222 mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT) {
1223 u8 sta_id = mvmvif->ap_sta_id;
1224
1225 sta = rcu_dereference_check(mvm->fw_id_to_mac_id[sta_id],
1226 lockdep_is_held(&mvm->mutex));
1227 /*
1228 * It is possible that the 'sta' parameter is NULL,
1229 * for example when a GTK is removed - the sta_id will then
1230 * be the AP ID, and no station was passed by mac80211.
1231 */
1232 if (IS_ERR_OR_NULL(sta))
1233 return IWL_MVM_STATION_COUNT;
1234
1235 return sta_id;
1236 }
1237
1238 return IWL_MVM_STATION_COUNT;
1239 }
1240
1241 static int iwl_mvm_send_sta_key(struct iwl_mvm *mvm,
1242 struct iwl_mvm_sta *mvm_sta,
1243 struct ieee80211_key_conf *keyconf, bool mcast,
1244 u32 tkip_iv32, u16 *tkip_p1k, u32 cmd_flags,
1245 u8 key_offset)
1246 {
1247 struct iwl_mvm_add_sta_key_cmd cmd = {};
1248 __le16 key_flags;
1249 int ret;
1250 u32 status;
1251 u16 keyidx;
1252 int i;
1253 u8 sta_id = mvm_sta->sta_id;
1254
1255 keyidx = (keyconf->keyidx << STA_KEY_FLG_KEYID_POS) &
1256 STA_KEY_FLG_KEYID_MSK;
1257 key_flags = cpu_to_le16(keyidx);
1258 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_KEY_MAP);
1259
1260 switch (keyconf->cipher) {
1261 case WLAN_CIPHER_SUITE_TKIP:
1262 key_flags |= cpu_to_le16(STA_KEY_FLG_TKIP);
1263 cmd.tkip_rx_tsc_byte2 = tkip_iv32;
1264 for (i = 0; i < 5; i++)
1265 cmd.tkip_rx_ttak[i] = cpu_to_le16(tkip_p1k[i]);
1266 memcpy(cmd.key, keyconf->key, keyconf->keylen);
1267 break;
1268 case WLAN_CIPHER_SUITE_CCMP:
1269 key_flags |= cpu_to_le16(STA_KEY_FLG_CCM);
1270 memcpy(cmd.key, keyconf->key, keyconf->keylen);
1271 break;
1272 case WLAN_CIPHER_SUITE_WEP104:
1273 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_13BYTES);
1274 /* fall through */
1275 case WLAN_CIPHER_SUITE_WEP40:
1276 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP);
1277 memcpy(cmd.key + 3, keyconf->key, keyconf->keylen);
1278 break;
1279 default:
1280 key_flags |= cpu_to_le16(STA_KEY_FLG_EXT);
1281 memcpy(cmd.key, keyconf->key, keyconf->keylen);
1282 }
1283
1284 if (mcast)
1285 key_flags |= cpu_to_le16(STA_KEY_MULTICAST);
1286
1287 cmd.key_offset = key_offset;
1288 cmd.key_flags = key_flags;
1289 cmd.sta_id = sta_id;
1290
1291 status = ADD_STA_SUCCESS;
1292 if (cmd_flags & CMD_ASYNC)
1293 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA_KEY, CMD_ASYNC,
1294 sizeof(cmd), &cmd);
1295 else
1296 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, sizeof(cmd),
1297 &cmd, &status);
1298
1299 switch (status) {
1300 case ADD_STA_SUCCESS:
1301 IWL_DEBUG_WEP(mvm, "MODIFY_STA: set dynamic key passed\n");
1302 break;
1303 default:
1304 ret = -EIO;
1305 IWL_ERR(mvm, "MODIFY_STA: set dynamic key failed\n");
1306 break;
1307 }
1308
1309 return ret;
1310 }
1311
1312 static int iwl_mvm_send_sta_igtk(struct iwl_mvm *mvm,
1313 struct ieee80211_key_conf *keyconf,
1314 u8 sta_id, bool remove_key)
1315 {
1316 struct iwl_mvm_mgmt_mcast_key_cmd igtk_cmd = {};
1317
1318 /* verify the key details match the required command's expectations */
1319 if (WARN_ON((keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC) ||
1320 (keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE) ||
1321 (keyconf->keyidx != 4 && keyconf->keyidx != 5)))
1322 return -EINVAL;
1323
1324 igtk_cmd.key_id = cpu_to_le32(keyconf->keyidx);
1325 igtk_cmd.sta_id = cpu_to_le32(sta_id);
1326
1327 if (remove_key) {
1328 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_NOT_VALID);
1329 } else {
1330 struct ieee80211_key_seq seq;
1331 const u8 *pn;
1332
1333 memcpy(igtk_cmd.IGTK, keyconf->key, keyconf->keylen);
1334 ieee80211_get_key_rx_seq(keyconf, 0, &seq);
1335 pn = seq.aes_cmac.pn;
1336 igtk_cmd.receive_seq_cnt = cpu_to_le64(((u64) pn[5] << 0) |
1337 ((u64) pn[4] << 8) |
1338 ((u64) pn[3] << 16) |
1339 ((u64) pn[2] << 24) |
1340 ((u64) pn[1] << 32) |
1341 ((u64) pn[0] << 40));
1342 }
1343
1344 IWL_DEBUG_INFO(mvm, "%s igtk for sta %u\n",
1345 remove_key ? "removing" : "installing",
1346 igtk_cmd.sta_id);
1347
1348 return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, 0,
1349 sizeof(igtk_cmd), &igtk_cmd);
1350 }
1351
1352
1353 static inline u8 *iwl_mvm_get_mac_addr(struct iwl_mvm *mvm,
1354 struct ieee80211_vif *vif,
1355 struct ieee80211_sta *sta)
1356 {
1357 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1358
1359 if (sta)
1360 return sta->addr;
1361
1362 if (vif->type == NL80211_IFTYPE_STATION &&
1363 mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT) {
1364 u8 sta_id = mvmvif->ap_sta_id;
1365 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
1366 lockdep_is_held(&mvm->mutex));
1367 return sta->addr;
1368 }
1369
1370
1371 return NULL;
1372 }
1373
1374 static int __iwl_mvm_set_sta_key(struct iwl_mvm *mvm,
1375 struct ieee80211_vif *vif,
1376 struct ieee80211_sta *sta,
1377 struct ieee80211_key_conf *keyconf,
1378 u8 key_offset,
1379 bool mcast)
1380 {
1381 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
1382 int ret;
1383 const u8 *addr;
1384 struct ieee80211_key_seq seq;
1385 u16 p1k[5];
1386
1387 switch (keyconf->cipher) {
1388 case WLAN_CIPHER_SUITE_TKIP:
1389 addr = iwl_mvm_get_mac_addr(mvm, vif, sta);
1390 /* get phase 1 key from mac80211 */
1391 ieee80211_get_key_rx_seq(keyconf, 0, &seq);
1392 ieee80211_get_tkip_rx_p1k(keyconf, addr, seq.tkip.iv32, p1k);
1393 ret = iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, mcast,
1394 seq.tkip.iv32, p1k, 0, key_offset);
1395 break;
1396 case WLAN_CIPHER_SUITE_CCMP:
1397 case WLAN_CIPHER_SUITE_WEP40:
1398 case WLAN_CIPHER_SUITE_WEP104:
1399 ret = iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, mcast,
1400 0, NULL, 0, key_offset);
1401 break;
1402 default:
1403 ret = iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, mcast,
1404 0, NULL, 0, key_offset);
1405 }
1406
1407 return ret;
1408 }
1409
1410 static int __iwl_mvm_remove_sta_key(struct iwl_mvm *mvm, u8 sta_id,
1411 struct ieee80211_key_conf *keyconf,
1412 bool mcast)
1413 {
1414 struct iwl_mvm_add_sta_key_cmd cmd = {};
1415 __le16 key_flags;
1416 int ret;
1417 u32 status;
1418
1419 key_flags = cpu_to_le16((keyconf->keyidx << STA_KEY_FLG_KEYID_POS) &
1420 STA_KEY_FLG_KEYID_MSK);
1421 key_flags |= cpu_to_le16(STA_KEY_FLG_NO_ENC | STA_KEY_FLG_WEP_KEY_MAP);
1422 key_flags |= cpu_to_le16(STA_KEY_NOT_VALID);
1423
1424 if (mcast)
1425 key_flags |= cpu_to_le16(STA_KEY_MULTICAST);
1426
1427 cmd.key_flags = key_flags;
1428 cmd.key_offset = keyconf->hw_key_idx;
1429 cmd.sta_id = sta_id;
1430
1431 status = ADD_STA_SUCCESS;
1432 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, sizeof(cmd),
1433 &cmd, &status);
1434
1435 switch (status) {
1436 case ADD_STA_SUCCESS:
1437 IWL_DEBUG_WEP(mvm, "MODIFY_STA: remove sta key passed\n");
1438 break;
1439 default:
1440 ret = -EIO;
1441 IWL_ERR(mvm, "MODIFY_STA: remove sta key failed\n");
1442 break;
1443 }
1444
1445 return ret;
1446 }
1447
1448 int iwl_mvm_set_sta_key(struct iwl_mvm *mvm,
1449 struct ieee80211_vif *vif,
1450 struct ieee80211_sta *sta,
1451 struct ieee80211_key_conf *keyconf,
1452 u8 key_offset)
1453 {
1454 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
1455 u8 sta_id;
1456 int ret;
1457 static const u8 __maybe_unused zero_addr[ETH_ALEN] = {0};
1458
1459 lockdep_assert_held(&mvm->mutex);
1460
1461 /* Get the station id from the mvm local station table */
1462 sta_id = iwl_mvm_get_key_sta_id(mvm, vif, sta);
1463 if (sta_id == IWL_MVM_STATION_COUNT) {
1464 IWL_ERR(mvm, "Failed to find station id\n");
1465 return -EINVAL;
1466 }
1467
1468 if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC) {
1469 ret = iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, false);
1470 goto end;
1471 }
1472
1473 /*
1474 * It is possible that the 'sta' parameter is NULL, and thus
1475 * there is a need to retrieve the sta from the local station table.
1476 */
1477 if (!sta) {
1478 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
1479 lockdep_is_held(&mvm->mutex));
1480 if (IS_ERR_OR_NULL(sta)) {
1481 IWL_ERR(mvm, "Invalid station id\n");
1482 return -EINVAL;
1483 }
1484 }
1485
1486 if (WARN_ON_ONCE(iwl_mvm_sta_from_mac80211(sta)->vif != vif))
1487 return -EINVAL;
1488
1489 /* If the key_offset is not pre-assigned, we need to find a
1490 * new offset to use. In normal cases, the offset is not
1491 * pre-assigned, but during HW_RESTART we want to reuse the
1492 * same indices, so we pass them when this function is called.
1493 *
1494 * In D3 entry, we need to hardcoded the indices (because the
1495 * firmware hardcodes the PTK offset to 0). In this case, we
1496 * need to make sure we don't overwrite the hw_key_idx in the
1497 * keyconf structure, because otherwise we cannot configure
1498 * the original ones back when resuming.
1499 */
1500 if (key_offset == STA_KEY_IDX_INVALID) {
1501 key_offset = iwl_mvm_set_fw_key_idx(mvm);
1502 if (key_offset == STA_KEY_IDX_INVALID)
1503 return -ENOSPC;
1504 keyconf->hw_key_idx = key_offset;
1505 }
1506
1507 ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf, key_offset, mcast);
1508 if (ret) {
1509 __clear_bit(keyconf->hw_key_idx, mvm->fw_key_table);
1510 goto end;
1511 }
1512
1513 /*
1514 * For WEP, the same key is used for multicast and unicast. Upload it
1515 * again, using the same key offset, and now pointing the other one
1516 * to the same key slot (offset).
1517 * If this fails, remove the original as well.
1518 */
1519 if (keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 ||
1520 keyconf->cipher == WLAN_CIPHER_SUITE_WEP104) {
1521 ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf,
1522 key_offset, !mcast);
1523 if (ret) {
1524 __clear_bit(keyconf->hw_key_idx, mvm->fw_key_table);
1525 __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast);
1526 }
1527 }
1528
1529 end:
1530 IWL_DEBUG_WEP(mvm, "key: cipher=%x len=%d idx=%d sta=%pM ret=%d\n",
1531 keyconf->cipher, keyconf->keylen, keyconf->keyidx,
1532 sta ? sta->addr : zero_addr, ret);
1533 return ret;
1534 }
1535
1536 int iwl_mvm_remove_sta_key(struct iwl_mvm *mvm,
1537 struct ieee80211_vif *vif,
1538 struct ieee80211_sta *sta,
1539 struct ieee80211_key_conf *keyconf)
1540 {
1541 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
1542 u8 sta_id;
1543 int ret, i;
1544
1545 lockdep_assert_held(&mvm->mutex);
1546
1547 /* Get the station id from the mvm local station table */
1548 sta_id = iwl_mvm_get_key_sta_id(mvm, vif, sta);
1549
1550 IWL_DEBUG_WEP(mvm, "mvm remove dynamic key: idx=%d sta=%d\n",
1551 keyconf->keyidx, sta_id);
1552
1553 if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC)
1554 return iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, true);
1555
1556 if (!__test_and_clear_bit(keyconf->hw_key_idx, mvm->fw_key_table)) {
1557 IWL_ERR(mvm, "offset %d not used in fw key table.\n",
1558 keyconf->hw_key_idx);
1559 return -ENOENT;
1560 }
1561
1562 /* track which key was deleted last */
1563 for (i = 0; i < STA_KEY_MAX_NUM; i++) {
1564 if (mvm->fw_key_deleted[i] < U8_MAX)
1565 mvm->fw_key_deleted[i]++;
1566 }
1567 mvm->fw_key_deleted[keyconf->hw_key_idx] = 0;
1568
1569 if (sta_id == IWL_MVM_STATION_COUNT) {
1570 IWL_DEBUG_WEP(mvm, "station non-existent, early return.\n");
1571 return 0;
1572 }
1573
1574 ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast);
1575 if (ret)
1576 return ret;
1577
1578 /* delete WEP key twice to get rid of (now useless) offset */
1579 if (keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 ||
1580 keyconf->cipher == WLAN_CIPHER_SUITE_WEP104)
1581 ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, !mcast);
1582
1583 return ret;
1584 }
1585
1586 void iwl_mvm_update_tkip_key(struct iwl_mvm *mvm,
1587 struct ieee80211_vif *vif,
1588 struct ieee80211_key_conf *keyconf,
1589 struct ieee80211_sta *sta, u32 iv32,
1590 u16 *phase1key)
1591 {
1592 struct iwl_mvm_sta *mvm_sta;
1593 u8 sta_id;
1594 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
1595
1596 rcu_read_lock();
1597
1598 sta_id = iwl_mvm_get_key_sta_id(mvm, vif, sta);
1599 if (WARN_ON_ONCE(sta_id == IWL_MVM_STATION_COUNT))
1600 goto unlock;
1601
1602 if (!sta) {
1603 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
1604 if (WARN_ON(IS_ERR_OR_NULL(sta))) {
1605 rcu_read_unlock();
1606 return;
1607 }
1608 }
1609
1610 mvm_sta = iwl_mvm_sta_from_mac80211(sta);
1611 iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, mcast,
1612 iv32, phase1key, CMD_ASYNC, keyconf->hw_key_idx);
1613
1614 unlock:
1615 rcu_read_unlock();
1616 }
1617
1618 void iwl_mvm_sta_modify_ps_wake(struct iwl_mvm *mvm,
1619 struct ieee80211_sta *sta)
1620 {
1621 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1622 struct iwl_mvm_add_sta_cmd cmd = {
1623 .add_modify = STA_MODE_MODIFY,
1624 .sta_id = mvmsta->sta_id,
1625 .station_flags_msk = cpu_to_le32(STA_FLG_PS),
1626 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
1627 };
1628 int ret;
1629
1630 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC, sizeof(cmd), &cmd);
1631 if (ret)
1632 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
1633 }
1634
1635 void iwl_mvm_sta_modify_sleep_tx_count(struct iwl_mvm *mvm,
1636 struct ieee80211_sta *sta,
1637 enum ieee80211_frame_release_type reason,
1638 u16 cnt, u16 tids, bool more_data,
1639 bool agg)
1640 {
1641 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1642 struct iwl_mvm_add_sta_cmd cmd = {
1643 .add_modify = STA_MODE_MODIFY,
1644 .sta_id = mvmsta->sta_id,
1645 .modify_mask = STA_MODIFY_SLEEPING_STA_TX_COUNT,
1646 .sleep_tx_count = cpu_to_le16(cnt),
1647 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
1648 };
1649 int tid, ret;
1650 unsigned long _tids = tids;
1651
1652 /* convert TIDs to ACs - we don't support TSPEC so that's OK
1653 * Note that this field is reserved and unused by firmware not
1654 * supporting GO uAPSD, so it's safe to always do this.
1655 */
1656 for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT)
1657 cmd.awake_acs |= BIT(tid_to_ucode_ac[tid]);
1658
1659 /* If we're releasing frames from aggregation queues then check if the
1660 * all queues combined that we're releasing frames from have
1661 * - more frames than the service period, in which case more_data
1662 * needs to be set
1663 * - fewer than 'cnt' frames, in which case we need to adjust the
1664 * firmware command (but do that unconditionally)
1665 */
1666 if (agg) {
1667 int remaining = cnt;
1668
1669 spin_lock_bh(&mvmsta->lock);
1670 for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT) {
1671 struct iwl_mvm_tid_data *tid_data;
1672 u16 n_queued;
1673
1674 tid_data = &mvmsta->tid_data[tid];
1675 if (WARN(tid_data->state != IWL_AGG_ON &&
1676 tid_data->state != IWL_EMPTYING_HW_QUEUE_DELBA,
1677 "TID %d state is %d\n",
1678 tid, tid_data->state)) {
1679 spin_unlock_bh(&mvmsta->lock);
1680 ieee80211_sta_eosp(sta);
1681 return;
1682 }
1683
1684 n_queued = iwl_mvm_tid_queued(tid_data);
1685 if (n_queued > remaining) {
1686 more_data = true;
1687 remaining = 0;
1688 break;
1689 }
1690 remaining -= n_queued;
1691 }
1692 spin_unlock_bh(&mvmsta->lock);
1693
1694 cmd.sleep_tx_count = cpu_to_le16(cnt - remaining);
1695 if (WARN_ON(cnt - remaining == 0)) {
1696 ieee80211_sta_eosp(sta);
1697 return;
1698 }
1699 }
1700
1701 /* Note: this is ignored by firmware not supporting GO uAPSD */
1702 if (more_data)
1703 cmd.sleep_state_flags |= cpu_to_le16(STA_SLEEP_STATE_MOREDATA);
1704
1705 if (reason == IEEE80211_FRAME_RELEASE_PSPOLL) {
1706 mvmsta->next_status_eosp = true;
1707 cmd.sleep_state_flags |= cpu_to_le16(STA_SLEEP_STATE_PS_POLL);
1708 } else {
1709 cmd.sleep_state_flags |= cpu_to_le16(STA_SLEEP_STATE_UAPSD);
1710 }
1711
1712 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC, sizeof(cmd), &cmd);
1713 if (ret)
1714 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
1715 }
1716
1717 void iwl_mvm_rx_eosp_notif(struct iwl_mvm *mvm,
1718 struct iwl_rx_cmd_buffer *rxb)
1719 {
1720 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1721 struct iwl_mvm_eosp_notification *notif = (void *)pkt->data;
1722 struct ieee80211_sta *sta;
1723 u32 sta_id = le32_to_cpu(notif->sta_id);
1724
1725 if (WARN_ON_ONCE(sta_id >= IWL_MVM_STATION_COUNT))
1726 return;
1727
1728 rcu_read_lock();
1729 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
1730 if (!IS_ERR_OR_NULL(sta))
1731 ieee80211_sta_eosp(sta);
1732 rcu_read_unlock();
1733 }
1734
1735 void iwl_mvm_sta_modify_disable_tx(struct iwl_mvm *mvm,
1736 struct iwl_mvm_sta *mvmsta, bool disable)
1737 {
1738 struct iwl_mvm_add_sta_cmd cmd = {
1739 .add_modify = STA_MODE_MODIFY,
1740 .sta_id = mvmsta->sta_id,
1741 .station_flags = disable ? cpu_to_le32(STA_FLG_DISABLE_TX) : 0,
1742 .station_flags_msk = cpu_to_le32(STA_FLG_DISABLE_TX),
1743 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
1744 };
1745 int ret;
1746
1747 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC, sizeof(cmd), &cmd);
1748 if (ret)
1749 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
1750 }
1751
1752 void iwl_mvm_sta_modify_disable_tx_ap(struct iwl_mvm *mvm,
1753 struct ieee80211_sta *sta,
1754 bool disable)
1755 {
1756 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
1757
1758 spin_lock_bh(&mvm_sta->lock);
1759
1760 if (mvm_sta->disable_tx == disable) {
1761 spin_unlock_bh(&mvm_sta->lock);
1762 return;
1763 }
1764
1765 mvm_sta->disable_tx = disable;
1766
1767 /*
1768 * Tell mac80211 to start/stop queuing tx for this station,
1769 * but don't stop queuing if there are still pending frames
1770 * for this station.
1771 */
1772 if (disable || !atomic_read(&mvm->pending_frames[mvm_sta->sta_id]))
1773 ieee80211_sta_block_awake(mvm->hw, sta, disable);
1774
1775 iwl_mvm_sta_modify_disable_tx(mvm, mvm_sta, disable);
1776
1777 spin_unlock_bh(&mvm_sta->lock);
1778 }
1779
1780 void iwl_mvm_modify_all_sta_disable_tx(struct iwl_mvm *mvm,
1781 struct iwl_mvm_vif *mvmvif,
1782 bool disable)
1783 {
1784 struct ieee80211_sta *sta;
1785 struct iwl_mvm_sta *mvm_sta;
1786 int i;
1787
1788 lockdep_assert_held(&mvm->mutex);
1789
1790 /* Block/unblock all the stations of the given mvmvif */
1791 for (i = 0; i < IWL_MVM_STATION_COUNT; i++) {
1792 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[i],
1793 lockdep_is_held(&mvm->mutex));
1794 if (IS_ERR_OR_NULL(sta))
1795 continue;
1796
1797 mvm_sta = iwl_mvm_sta_from_mac80211(sta);
1798 if (mvm_sta->mac_id_n_color !=
1799 FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color))
1800 continue;
1801
1802 iwl_mvm_sta_modify_disable_tx_ap(mvm, sta, disable);
1803 }
1804 }
1805
1806 void iwl_mvm_csa_client_absent(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1807 {
1808 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1809 struct iwl_mvm_sta *mvmsta;
1810
1811 rcu_read_lock();
1812
1813 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, mvmvif->ap_sta_id);
1814
1815 if (!WARN_ON(!mvmsta))
1816 iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, true);
1817
1818 rcu_read_unlock();
1819 }
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