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[mirror_ubuntu-hirsute-kernel.git] / drivers / net / wireless / intel / iwlwifi / mvm / mac-ctxt.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 - 2014 Intel Corporation. All rights reserved.
9 * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
10 * Copyright(c) 2015 - 2017 Intel Deutschland GmbH
11 *
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of version 2 of the GNU General Public License as
14 * published by the Free Software Foundation.
15 *
16 * This program is distributed in the hope that it will be useful, but
17 * WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
19 * General Public License for more details.
20 *
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
24 * USA
25 *
26 * The full GNU General Public License is included in this distribution
27 * in the file called COPYING.
28 *
29 * Contact Information:
30 * Intel Linux Wireless <linuxwifi@intel.com>
31 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
32 *
33 * BSD LICENSE
34 *
35 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
36 * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
37 * Copyright(c) 2015 - 2017 Intel Deutschland GmbH
38 * All rights reserved.
39 *
40 * Redistribution and use in source and binary forms, with or without
41 * modification, are permitted provided that the following conditions
42 * are met:
43 *
44 * * Redistributions of source code must retain the above copyright
45 * notice, this list of conditions and the following disclaimer.
46 * * Redistributions in binary form must reproduce the above copyright
47 * notice, this list of conditions and the following disclaimer in
48 * the documentation and/or other materials provided with the
49 * distribution.
50 * * Neither the name Intel Corporation nor the names of its
51 * contributors may be used to endorse or promote products derived
52 * from this software without specific prior written permission.
53 *
54 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
55 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
56 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
57 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
58 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
59 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
60 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
61 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
62 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
63 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
64 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
65 *
66 *****************************************************************************/
67
68 #include <linux/etherdevice.h>
69 #include <net/mac80211.h>
70 #include "iwl-io.h"
71 #include "iwl-prph.h"
72 #include "fw-api.h"
73 #include "mvm.h"
74 #include "time-event.h"
75
76 const u8 iwl_mvm_ac_to_tx_fifo[] = {
77 IWL_MVM_TX_FIFO_VO,
78 IWL_MVM_TX_FIFO_VI,
79 IWL_MVM_TX_FIFO_BE,
80 IWL_MVM_TX_FIFO_BK,
81 };
82
83 const u8 iwl_mvm_ac_to_gen2_tx_fifo[] = {
84 IWL_GEN2_EDCA_TX_FIFO_VO,
85 IWL_GEN2_EDCA_TX_FIFO_VI,
86 IWL_GEN2_EDCA_TX_FIFO_BE,
87 IWL_GEN2_EDCA_TX_FIFO_BK,
88 };
89
90 struct iwl_mvm_mac_iface_iterator_data {
91 struct iwl_mvm *mvm;
92 struct ieee80211_vif *vif;
93 unsigned long available_mac_ids[BITS_TO_LONGS(NUM_MAC_INDEX_DRIVER)];
94 unsigned long available_tsf_ids[BITS_TO_LONGS(NUM_TSF_IDS)];
95 enum iwl_tsf_id preferred_tsf;
96 bool found_vif;
97 };
98
99 struct iwl_mvm_hw_queues_iface_iterator_data {
100 struct ieee80211_vif *exclude_vif;
101 unsigned long used_hw_queues;
102 };
103
104 static void iwl_mvm_mac_tsf_id_iter(void *_data, u8 *mac,
105 struct ieee80211_vif *vif)
106 {
107 struct iwl_mvm_mac_iface_iterator_data *data = _data;
108 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
109 u16 min_bi;
110
111 /* Skip the interface for which we are trying to assign a tsf_id */
112 if (vif == data->vif)
113 return;
114
115 /*
116 * The TSF is a hardware/firmware resource, there are 4 and
117 * the driver should assign and free them as needed. However,
118 * there are cases where 2 MACs should share the same TSF ID
119 * for the purpose of clock sync, an optimization to avoid
120 * clock drift causing overlapping TBTTs/DTIMs for a GO and
121 * client in the system.
122 *
123 * The firmware will decide according to the MAC type which
124 * will be the master and slave. Clients that need to sync
125 * with a remote station will be the master, and an AP or GO
126 * will be the slave.
127 *
128 * Depending on the new interface type it can be slaved to
129 * or become the master of an existing interface.
130 */
131 switch (data->vif->type) {
132 case NL80211_IFTYPE_STATION:
133 /*
134 * The new interface is a client, so if the one we're iterating
135 * is an AP, and the beacon interval of the AP is a multiple or
136 * divisor of the beacon interval of the client, the same TSF
137 * should be used to avoid drift between the new client and
138 * existing AP. The existing AP will get drift updates from the
139 * new client context in this case.
140 */
141 if (vif->type != NL80211_IFTYPE_AP ||
142 data->preferred_tsf != NUM_TSF_IDS ||
143 !test_bit(mvmvif->tsf_id, data->available_tsf_ids))
144 break;
145
146 min_bi = min(data->vif->bss_conf.beacon_int,
147 vif->bss_conf.beacon_int);
148
149 if (!min_bi)
150 break;
151
152 if ((data->vif->bss_conf.beacon_int -
153 vif->bss_conf.beacon_int) % min_bi == 0) {
154 data->preferred_tsf = mvmvif->tsf_id;
155 return;
156 }
157 break;
158
159 case NL80211_IFTYPE_AP:
160 /*
161 * The new interface is AP/GO, so if its beacon interval is a
162 * multiple or a divisor of the beacon interval of an existing
163 * interface, it should get drift updates from an existing
164 * client or use the same TSF as an existing GO. There's no
165 * drift between TSFs internally but if they used different
166 * TSFs then a new client MAC could update one of them and
167 * cause drift that way.
168 */
169 if ((vif->type != NL80211_IFTYPE_AP &&
170 vif->type != NL80211_IFTYPE_STATION) ||
171 data->preferred_tsf != NUM_TSF_IDS ||
172 !test_bit(mvmvif->tsf_id, data->available_tsf_ids))
173 break;
174
175 min_bi = min(data->vif->bss_conf.beacon_int,
176 vif->bss_conf.beacon_int);
177
178 if (!min_bi)
179 break;
180
181 if ((data->vif->bss_conf.beacon_int -
182 vif->bss_conf.beacon_int) % min_bi == 0) {
183 data->preferred_tsf = mvmvif->tsf_id;
184 return;
185 }
186 break;
187 default:
188 /*
189 * For all other interface types there's no need to
190 * take drift into account. Either they're exclusive
191 * like IBSS and monitor, or we don't care much about
192 * their TSF (like P2P Device), but we won't be able
193 * to share the TSF resource.
194 */
195 break;
196 }
197
198 /*
199 * Unless we exited above, we can't share the TSF resource
200 * that the virtual interface we're iterating over is using
201 * with the new one, so clear the available bit and if this
202 * was the preferred one, reset that as well.
203 */
204 __clear_bit(mvmvif->tsf_id, data->available_tsf_ids);
205
206 if (data->preferred_tsf == mvmvif->tsf_id)
207 data->preferred_tsf = NUM_TSF_IDS;
208 }
209
210 /*
211 * Get the mask of the queues used by the vif
212 */
213 u32 iwl_mvm_mac_get_queues_mask(struct ieee80211_vif *vif)
214 {
215 u32 qmask = 0, ac;
216
217 if (vif->type == NL80211_IFTYPE_P2P_DEVICE)
218 return BIT(IWL_MVM_OFFCHANNEL_QUEUE);
219
220 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
221 if (vif->hw_queue[ac] != IEEE80211_INVAL_HW_QUEUE)
222 qmask |= BIT(vif->hw_queue[ac]);
223 }
224
225 if (vif->type == NL80211_IFTYPE_AP ||
226 vif->type == NL80211_IFTYPE_ADHOC)
227 qmask |= BIT(vif->cab_queue);
228
229 return qmask;
230 }
231
232 static void iwl_mvm_iface_hw_queues_iter(void *_data, u8 *mac,
233 struct ieee80211_vif *vif)
234 {
235 struct iwl_mvm_hw_queues_iface_iterator_data *data = _data;
236
237 /* exclude the given vif */
238 if (vif == data->exclude_vif)
239 return;
240
241 data->used_hw_queues |= iwl_mvm_mac_get_queues_mask(vif);
242 }
243
244 unsigned long iwl_mvm_get_used_hw_queues(struct iwl_mvm *mvm,
245 struct ieee80211_vif *exclude_vif)
246 {
247 struct iwl_mvm_hw_queues_iface_iterator_data data = {
248 .exclude_vif = exclude_vif,
249 .used_hw_queues =
250 BIT(IWL_MVM_OFFCHANNEL_QUEUE) |
251 BIT(mvm->aux_queue) |
252 BIT(IWL_MVM_DQA_GCAST_QUEUE),
253 };
254
255 lockdep_assert_held(&mvm->mutex);
256
257 /* mark all VIF used hw queues */
258 ieee80211_iterate_active_interfaces_atomic(
259 mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
260 iwl_mvm_iface_hw_queues_iter, &data);
261
262 return data.used_hw_queues;
263 }
264
265 static void iwl_mvm_mac_iface_iterator(void *_data, u8 *mac,
266 struct ieee80211_vif *vif)
267 {
268 struct iwl_mvm_mac_iface_iterator_data *data = _data;
269 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
270
271 /* Iterator may already find the interface being added -- skip it */
272 if (vif == data->vif) {
273 data->found_vif = true;
274 return;
275 }
276
277 /* Mark MAC IDs as used by clearing the available bit, and
278 * (below) mark TSFs as used if their existing use is not
279 * compatible with the new interface type.
280 * No locking or atomic bit operations are needed since the
281 * data is on the stack of the caller function.
282 */
283 __clear_bit(mvmvif->id, data->available_mac_ids);
284
285 /* find a suitable tsf_id */
286 iwl_mvm_mac_tsf_id_iter(_data, mac, vif);
287 }
288
289 void iwl_mvm_mac_ctxt_recalc_tsf_id(struct iwl_mvm *mvm,
290 struct ieee80211_vif *vif)
291 {
292 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
293 struct iwl_mvm_mac_iface_iterator_data data = {
294 .mvm = mvm,
295 .vif = vif,
296 .available_tsf_ids = { (1 << NUM_TSF_IDS) - 1 },
297 /* no preference yet */
298 .preferred_tsf = NUM_TSF_IDS,
299 };
300
301 ieee80211_iterate_active_interfaces_atomic(
302 mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
303 iwl_mvm_mac_tsf_id_iter, &data);
304
305 if (data.preferred_tsf != NUM_TSF_IDS)
306 mvmvif->tsf_id = data.preferred_tsf;
307 else if (!test_bit(mvmvif->tsf_id, data.available_tsf_ids))
308 mvmvif->tsf_id = find_first_bit(data.available_tsf_ids,
309 NUM_TSF_IDS);
310 }
311
312 int iwl_mvm_mac_ctxt_init(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
313 {
314 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
315 struct iwl_mvm_mac_iface_iterator_data data = {
316 .mvm = mvm,
317 .vif = vif,
318 .available_mac_ids = { (1 << NUM_MAC_INDEX_DRIVER) - 1 },
319 .available_tsf_ids = { (1 << NUM_TSF_IDS) - 1 },
320 /* no preference yet */
321 .preferred_tsf = NUM_TSF_IDS,
322 .found_vif = false,
323 };
324 u32 ac;
325 int ret, i, queue_limit;
326 unsigned long used_hw_queues;
327
328 lockdep_assert_held(&mvm->mutex);
329
330 /*
331 * Allocate a MAC ID and a TSF for this MAC, along with the queues
332 * and other resources.
333 */
334
335 /*
336 * Before the iterator, we start with all MAC IDs and TSFs available.
337 *
338 * During iteration, all MAC IDs are cleared that are in use by other
339 * virtual interfaces, and all TSF IDs are cleared that can't be used
340 * by this new virtual interface because they're used by an interface
341 * that can't share it with the new one.
342 * At the same time, we check if there's a preferred TSF in the case
343 * that we should share it with another interface.
344 */
345
346 /* Currently, MAC ID 0 should be used only for the managed/IBSS vif */
347 switch (vif->type) {
348 case NL80211_IFTYPE_ADHOC:
349 break;
350 case NL80211_IFTYPE_STATION:
351 if (!vif->p2p)
352 break;
353 /* fall through */
354 default:
355 __clear_bit(0, data.available_mac_ids);
356 }
357
358 ieee80211_iterate_active_interfaces_atomic(
359 mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
360 iwl_mvm_mac_iface_iterator, &data);
361
362 used_hw_queues = iwl_mvm_get_used_hw_queues(mvm, vif);
363
364 /*
365 * In the case we're getting here during resume, it's similar to
366 * firmware restart, and with RESUME_ALL the iterator will find
367 * the vif being added already.
368 * We don't want to reassign any IDs in either case since doing
369 * so would probably assign different IDs (as interfaces aren't
370 * necessarily added in the same order), but the old IDs were
371 * preserved anyway, so skip ID assignment for both resume and
372 * recovery.
373 */
374 if (data.found_vif)
375 return 0;
376
377 /* Therefore, in recovery, we can't get here */
378 if (WARN_ON_ONCE(test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)))
379 return -EBUSY;
380
381 mvmvif->id = find_first_bit(data.available_mac_ids,
382 NUM_MAC_INDEX_DRIVER);
383 if (mvmvif->id == NUM_MAC_INDEX_DRIVER) {
384 IWL_ERR(mvm, "Failed to init MAC context - no free ID!\n");
385 ret = -EIO;
386 goto exit_fail;
387 }
388
389 if (data.preferred_tsf != NUM_TSF_IDS)
390 mvmvif->tsf_id = data.preferred_tsf;
391 else
392 mvmvif->tsf_id = find_first_bit(data.available_tsf_ids,
393 NUM_TSF_IDS);
394 if (mvmvif->tsf_id == NUM_TSF_IDS) {
395 IWL_ERR(mvm, "Failed to init MAC context - no free TSF!\n");
396 ret = -EIO;
397 goto exit_fail;
398 }
399
400 mvmvif->color = 0;
401
402 INIT_LIST_HEAD(&mvmvif->time_event_data.list);
403 mvmvif->time_event_data.id = TE_MAX;
404
405 /* No need to allocate data queues to P2P Device MAC.*/
406 if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
407 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
408 vif->hw_queue[ac] = IEEE80211_INVAL_HW_QUEUE;
409
410 return 0;
411 }
412
413 /*
414 * queues in mac80211 almost entirely independent of
415 * the ones here - no real limit
416 */
417 queue_limit = IEEE80211_MAX_QUEUES;
418 BUILD_BUG_ON(IEEE80211_MAX_QUEUES >
419 BITS_PER_BYTE *
420 sizeof(mvm->hw_queue_to_mac80211[0]));
421
422 /*
423 * Find available queues, and allocate them to the ACs. When in
424 * DQA-mode they aren't really used, and this is done only so the
425 * mac80211 ieee80211_check_queues() function won't fail
426 */
427 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
428 u8 queue = find_first_zero_bit(&used_hw_queues, queue_limit);
429
430 if (queue >= queue_limit) {
431 IWL_ERR(mvm, "Failed to allocate queue\n");
432 ret = -EIO;
433 goto exit_fail;
434 }
435
436 __set_bit(queue, &used_hw_queues);
437 vif->hw_queue[ac] = queue;
438 }
439
440 /* Allocate the CAB queue for softAP and GO interfaces */
441 if (vif->type == NL80211_IFTYPE_AP) {
442 /*
443 * For TVQM this will be overwritten later with the FW assigned
444 * queue value (when queue is enabled).
445 */
446 mvmvif->cab_queue = IWL_MVM_DQA_GCAST_QUEUE;
447 vif->cab_queue = IWL_MVM_DQA_GCAST_QUEUE;
448 } else {
449 vif->cab_queue = IEEE80211_INVAL_HW_QUEUE;
450 }
451
452 mvmvif->bcast_sta.sta_id = IWL_MVM_INVALID_STA;
453 mvmvif->mcast_sta.sta_id = IWL_MVM_INVALID_STA;
454 mvmvif->ap_sta_id = IWL_MVM_INVALID_STA;
455
456 for (i = 0; i < NUM_IWL_MVM_SMPS_REQ; i++)
457 mvmvif->smps_requests[i] = IEEE80211_SMPS_AUTOMATIC;
458
459 return 0;
460
461 exit_fail:
462 memset(mvmvif, 0, sizeof(struct iwl_mvm_vif));
463 memset(vif->hw_queue, IEEE80211_INVAL_HW_QUEUE, sizeof(vif->hw_queue));
464 vif->cab_queue = IEEE80211_INVAL_HW_QUEUE;
465 return ret;
466 }
467
468 static void iwl_mvm_ack_rates(struct iwl_mvm *mvm,
469 struct ieee80211_vif *vif,
470 enum nl80211_band band,
471 u8 *cck_rates, u8 *ofdm_rates)
472 {
473 struct ieee80211_supported_band *sband;
474 unsigned long basic = vif->bss_conf.basic_rates;
475 int lowest_present_ofdm = 100;
476 int lowest_present_cck = 100;
477 u8 cck = 0;
478 u8 ofdm = 0;
479 int i;
480
481 sband = mvm->hw->wiphy->bands[band];
482
483 for_each_set_bit(i, &basic, BITS_PER_LONG) {
484 int hw = sband->bitrates[i].hw_value;
485 if (hw >= IWL_FIRST_OFDM_RATE) {
486 ofdm |= BIT(hw - IWL_FIRST_OFDM_RATE);
487 if (lowest_present_ofdm > hw)
488 lowest_present_ofdm = hw;
489 } else {
490 BUILD_BUG_ON(IWL_FIRST_CCK_RATE != 0);
491
492 cck |= BIT(hw);
493 if (lowest_present_cck > hw)
494 lowest_present_cck = hw;
495 }
496 }
497
498 /*
499 * Now we've got the basic rates as bitmaps in the ofdm and cck
500 * variables. This isn't sufficient though, as there might not
501 * be all the right rates in the bitmap. E.g. if the only basic
502 * rates are 5.5 Mbps and 11 Mbps, we still need to add 1 Mbps
503 * and 6 Mbps because the 802.11-2007 standard says in 9.6:
504 *
505 * [...] a STA responding to a received frame shall transmit
506 * its Control Response frame [...] at the highest rate in the
507 * BSSBasicRateSet parameter that is less than or equal to the
508 * rate of the immediately previous frame in the frame exchange
509 * sequence ([...]) and that is of the same modulation class
510 * ([...]) as the received frame. If no rate contained in the
511 * BSSBasicRateSet parameter meets these conditions, then the
512 * control frame sent in response to a received frame shall be
513 * transmitted at the highest mandatory rate of the PHY that is
514 * less than or equal to the rate of the received frame, and
515 * that is of the same modulation class as the received frame.
516 *
517 * As a consequence, we need to add all mandatory rates that are
518 * lower than all of the basic rates to these bitmaps.
519 */
520
521 if (IWL_RATE_24M_INDEX < lowest_present_ofdm)
522 ofdm |= IWL_RATE_BIT_MSK(24) >> IWL_FIRST_OFDM_RATE;
523 if (IWL_RATE_12M_INDEX < lowest_present_ofdm)
524 ofdm |= IWL_RATE_BIT_MSK(12) >> IWL_FIRST_OFDM_RATE;
525 /* 6M already there or needed so always add */
526 ofdm |= IWL_RATE_BIT_MSK(6) >> IWL_FIRST_OFDM_RATE;
527
528 /*
529 * CCK is a bit more complex with DSSS vs. HR/DSSS vs. ERP.
530 * Note, however:
531 * - if no CCK rates are basic, it must be ERP since there must
532 * be some basic rates at all, so they're OFDM => ERP PHY
533 * (or we're in 5 GHz, and the cck bitmap will never be used)
534 * - if 11M is a basic rate, it must be ERP as well, so add 5.5M
535 * - if 5.5M is basic, 1M and 2M are mandatory
536 * - if 2M is basic, 1M is mandatory
537 * - if 1M is basic, that's the only valid ACK rate.
538 * As a consequence, it's not as complicated as it sounds, just add
539 * any lower rates to the ACK rate bitmap.
540 */
541 if (IWL_RATE_11M_INDEX < lowest_present_cck)
542 cck |= IWL_RATE_BIT_MSK(11) >> IWL_FIRST_CCK_RATE;
543 if (IWL_RATE_5M_INDEX < lowest_present_cck)
544 cck |= IWL_RATE_BIT_MSK(5) >> IWL_FIRST_CCK_RATE;
545 if (IWL_RATE_2M_INDEX < lowest_present_cck)
546 cck |= IWL_RATE_BIT_MSK(2) >> IWL_FIRST_CCK_RATE;
547 /* 1M already there or needed so always add */
548 cck |= IWL_RATE_BIT_MSK(1) >> IWL_FIRST_CCK_RATE;
549
550 *cck_rates = cck;
551 *ofdm_rates = ofdm;
552 }
553
554 static void iwl_mvm_mac_ctxt_set_ht_flags(struct iwl_mvm *mvm,
555 struct ieee80211_vif *vif,
556 struct iwl_mac_ctx_cmd *cmd)
557 {
558 /* for both sta and ap, ht_operation_mode hold the protection_mode */
559 u8 protection_mode = vif->bss_conf.ht_operation_mode &
560 IEEE80211_HT_OP_MODE_PROTECTION;
561 /* The fw does not distinguish between ht and fat */
562 u32 ht_flag = MAC_PROT_FLG_HT_PROT | MAC_PROT_FLG_FAT_PROT;
563
564 IWL_DEBUG_RATE(mvm, "protection mode set to %d\n", protection_mode);
565 /*
566 * See section 9.23.3.1 of IEEE 80211-2012.
567 * Nongreenfield HT STAs Present is not supported.
568 */
569 switch (protection_mode) {
570 case IEEE80211_HT_OP_MODE_PROTECTION_NONE:
571 break;
572 case IEEE80211_HT_OP_MODE_PROTECTION_NONMEMBER:
573 case IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED:
574 cmd->protection_flags |= cpu_to_le32(ht_flag);
575 break;
576 case IEEE80211_HT_OP_MODE_PROTECTION_20MHZ:
577 /* Protect when channel wider than 20MHz */
578 if (vif->bss_conf.chandef.width > NL80211_CHAN_WIDTH_20)
579 cmd->protection_flags |= cpu_to_le32(ht_flag);
580 break;
581 default:
582 IWL_ERR(mvm, "Illegal protection mode %d\n",
583 protection_mode);
584 break;
585 }
586 }
587
588 static void iwl_mvm_mac_ctxt_cmd_common(struct iwl_mvm *mvm,
589 struct ieee80211_vif *vif,
590 struct iwl_mac_ctx_cmd *cmd,
591 const u8 *bssid_override,
592 u32 action)
593 {
594 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
595 struct ieee80211_chanctx_conf *chanctx;
596 bool ht_enabled = !!(vif->bss_conf.ht_operation_mode &
597 IEEE80211_HT_OP_MODE_PROTECTION);
598 u8 cck_ack_rates, ofdm_ack_rates;
599 const u8 *bssid = bssid_override ?: vif->bss_conf.bssid;
600 int i;
601
602 cmd->id_and_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id,
603 mvmvif->color));
604 cmd->action = cpu_to_le32(action);
605
606 switch (vif->type) {
607 case NL80211_IFTYPE_STATION:
608 if (vif->p2p)
609 cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_P2P_STA);
610 else
611 cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_BSS_STA);
612 break;
613 case NL80211_IFTYPE_AP:
614 cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_GO);
615 break;
616 case NL80211_IFTYPE_MONITOR:
617 cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_LISTENER);
618 break;
619 case NL80211_IFTYPE_P2P_DEVICE:
620 cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_P2P_DEVICE);
621 break;
622 case NL80211_IFTYPE_ADHOC:
623 cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_IBSS);
624 break;
625 default:
626 WARN_ON_ONCE(1);
627 }
628
629 cmd->tsf_id = cpu_to_le32(mvmvif->tsf_id);
630
631 memcpy(cmd->node_addr, vif->addr, ETH_ALEN);
632
633 if (bssid)
634 memcpy(cmd->bssid_addr, bssid, ETH_ALEN);
635 else
636 eth_broadcast_addr(cmd->bssid_addr);
637
638 rcu_read_lock();
639 chanctx = rcu_dereference(vif->chanctx_conf);
640 iwl_mvm_ack_rates(mvm, vif, chanctx ? chanctx->def.chan->band
641 : NL80211_BAND_2GHZ,
642 &cck_ack_rates, &ofdm_ack_rates);
643 rcu_read_unlock();
644
645 cmd->cck_rates = cpu_to_le32((u32)cck_ack_rates);
646 cmd->ofdm_rates = cpu_to_le32((u32)ofdm_ack_rates);
647
648 cmd->cck_short_preamble =
649 cpu_to_le32(vif->bss_conf.use_short_preamble ?
650 MAC_FLG_SHORT_PREAMBLE : 0);
651 cmd->short_slot =
652 cpu_to_le32(vif->bss_conf.use_short_slot ?
653 MAC_FLG_SHORT_SLOT : 0);
654
655 cmd->filter_flags = cpu_to_le32(MAC_FILTER_ACCEPT_GRP);
656
657 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
658 u8 txf = iwl_mvm_mac_ac_to_tx_fifo(mvm, i);
659
660 cmd->ac[txf].cw_min =
661 cpu_to_le16(mvmvif->queue_params[i].cw_min);
662 cmd->ac[txf].cw_max =
663 cpu_to_le16(mvmvif->queue_params[i].cw_max);
664 cmd->ac[txf].edca_txop =
665 cpu_to_le16(mvmvif->queue_params[i].txop * 32);
666 cmd->ac[txf].aifsn = mvmvif->queue_params[i].aifs;
667 cmd->ac[txf].fifos_mask = BIT(txf);
668 }
669
670 if (vif->bss_conf.qos)
671 cmd->qos_flags |= cpu_to_le32(MAC_QOS_FLG_UPDATE_EDCA);
672
673 if (vif->bss_conf.use_cts_prot)
674 cmd->protection_flags |= cpu_to_le32(MAC_PROT_FLG_TGG_PROTECT);
675
676 IWL_DEBUG_RATE(mvm, "use_cts_prot %d, ht_operation_mode %d\n",
677 vif->bss_conf.use_cts_prot,
678 vif->bss_conf.ht_operation_mode);
679 if (vif->bss_conf.chandef.width != NL80211_CHAN_WIDTH_20_NOHT)
680 cmd->qos_flags |= cpu_to_le32(MAC_QOS_FLG_TGN);
681 if (ht_enabled)
682 iwl_mvm_mac_ctxt_set_ht_flags(mvm, vif, cmd);
683 }
684
685 static int iwl_mvm_mac_ctxt_send_cmd(struct iwl_mvm *mvm,
686 struct iwl_mac_ctx_cmd *cmd)
687 {
688 int ret = iwl_mvm_send_cmd_pdu(mvm, MAC_CONTEXT_CMD, 0,
689 sizeof(*cmd), cmd);
690 if (ret)
691 IWL_ERR(mvm, "Failed to send MAC context (action:%d): %d\n",
692 le32_to_cpu(cmd->action), ret);
693 return ret;
694 }
695
696 static int iwl_mvm_mac_ctxt_cmd_sta(struct iwl_mvm *mvm,
697 struct ieee80211_vif *vif,
698 u32 action, bool force_assoc_off,
699 const u8 *bssid_override)
700 {
701 struct iwl_mac_ctx_cmd cmd = {};
702 struct iwl_mac_data_sta *ctxt_sta;
703
704 WARN_ON(vif->type != NL80211_IFTYPE_STATION);
705
706 /* Fill the common data for all mac context types */
707 iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, bssid_override, action);
708
709 if (vif->p2p) {
710 struct ieee80211_p2p_noa_attr *noa =
711 &vif->bss_conf.p2p_noa_attr;
712
713 cmd.p2p_sta.ctwin = cpu_to_le32(noa->oppps_ctwindow &
714 IEEE80211_P2P_OPPPS_CTWINDOW_MASK);
715 ctxt_sta = &cmd.p2p_sta.sta;
716 } else {
717 ctxt_sta = &cmd.sta;
718 }
719
720 /* We need the dtim_period to set the MAC as associated */
721 if (vif->bss_conf.assoc && vif->bss_conf.dtim_period &&
722 !force_assoc_off) {
723 u32 dtim_offs;
724
725 /*
726 * The DTIM count counts down, so when it is N that means N
727 * more beacon intervals happen until the DTIM TBTT. Therefore
728 * add this to the current time. If that ends up being in the
729 * future, the firmware will handle it.
730 *
731 * Also note that the system_timestamp (which we get here as
732 * "sync_device_ts") and TSF timestamp aren't at exactly the
733 * same offset in the frame -- the TSF is at the first symbol
734 * of the TSF, the system timestamp is at signal acquisition
735 * time. This means there's an offset between them of at most
736 * a few hundred microseconds (24 * 8 bits + PLCP time gives
737 * 384us in the longest case), this is currently not relevant
738 * as the firmware wakes up around 2ms before the TBTT.
739 */
740 dtim_offs = vif->bss_conf.sync_dtim_count *
741 vif->bss_conf.beacon_int;
742 /* convert TU to usecs */
743 dtim_offs *= 1024;
744
745 ctxt_sta->dtim_tsf =
746 cpu_to_le64(vif->bss_conf.sync_tsf + dtim_offs);
747 ctxt_sta->dtim_time =
748 cpu_to_le32(vif->bss_conf.sync_device_ts + dtim_offs);
749 ctxt_sta->assoc_beacon_arrive_time =
750 cpu_to_le32(vif->bss_conf.sync_device_ts);
751
752 IWL_DEBUG_INFO(mvm, "DTIM TBTT is 0x%llx/0x%x, offset %d\n",
753 le64_to_cpu(ctxt_sta->dtim_tsf),
754 le32_to_cpu(ctxt_sta->dtim_time),
755 dtim_offs);
756
757 ctxt_sta->is_assoc = cpu_to_le32(1);
758 } else {
759 ctxt_sta->is_assoc = cpu_to_le32(0);
760
761 /* Allow beacons to pass through as long as we are not
762 * associated, or we do not have dtim period information.
763 */
764 cmd.filter_flags |= cpu_to_le32(MAC_FILTER_IN_BEACON);
765 }
766
767 ctxt_sta->bi = cpu_to_le32(vif->bss_conf.beacon_int);
768 ctxt_sta->bi_reciprocal =
769 cpu_to_le32(iwl_mvm_reciprocal(vif->bss_conf.beacon_int));
770 ctxt_sta->dtim_interval = cpu_to_le32(vif->bss_conf.beacon_int *
771 vif->bss_conf.dtim_period);
772 ctxt_sta->dtim_reciprocal =
773 cpu_to_le32(iwl_mvm_reciprocal(vif->bss_conf.beacon_int *
774 vif->bss_conf.dtim_period));
775
776 ctxt_sta->listen_interval = cpu_to_le32(mvm->hw->conf.listen_interval);
777 ctxt_sta->assoc_id = cpu_to_le32(vif->bss_conf.aid);
778
779 if (vif->probe_req_reg && vif->bss_conf.assoc && vif->p2p)
780 cmd.filter_flags |= cpu_to_le32(MAC_FILTER_IN_PROBE_REQUEST);
781
782 return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd);
783 }
784
785 static int iwl_mvm_mac_ctxt_cmd_listener(struct iwl_mvm *mvm,
786 struct ieee80211_vif *vif,
787 u32 action)
788 {
789 struct iwl_mac_ctx_cmd cmd = {};
790 u32 tfd_queue_msk = BIT(mvm->snif_queue);
791 int ret;
792
793 WARN_ON(vif->type != NL80211_IFTYPE_MONITOR);
794
795 iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, NULL, action);
796
797 cmd.filter_flags = cpu_to_le32(MAC_FILTER_IN_PROMISC |
798 MAC_FILTER_IN_CONTROL_AND_MGMT |
799 MAC_FILTER_IN_BEACON |
800 MAC_FILTER_IN_PROBE_REQUEST |
801 MAC_FILTER_IN_CRC32);
802 ieee80211_hw_set(mvm->hw, RX_INCLUDES_FCS);
803
804 /* Allocate sniffer station */
805 ret = iwl_mvm_allocate_int_sta(mvm, &mvm->snif_sta, tfd_queue_msk,
806 vif->type, IWL_STA_GENERAL_PURPOSE);
807 if (ret)
808 return ret;
809
810 return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd);
811 }
812
813 static int iwl_mvm_mac_ctxt_cmd_ibss(struct iwl_mvm *mvm,
814 struct ieee80211_vif *vif,
815 u32 action)
816 {
817 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
818 struct iwl_mac_ctx_cmd cmd = {};
819
820 WARN_ON(vif->type != NL80211_IFTYPE_ADHOC);
821
822 iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, NULL, action);
823
824 cmd.filter_flags = cpu_to_le32(MAC_FILTER_IN_BEACON |
825 MAC_FILTER_IN_PROBE_REQUEST);
826
827 /* cmd.ibss.beacon_time/cmd.ibss.beacon_tsf are curently ignored */
828 cmd.ibss.bi = cpu_to_le32(vif->bss_conf.beacon_int);
829 cmd.ibss.bi_reciprocal =
830 cpu_to_le32(iwl_mvm_reciprocal(vif->bss_conf.beacon_int));
831
832 /* TODO: Assumes that the beacon id == mac context id */
833 cmd.ibss.beacon_template = cpu_to_le32(mvmvif->id);
834
835 return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd);
836 }
837
838 struct iwl_mvm_go_iterator_data {
839 bool go_active;
840 };
841
842 static void iwl_mvm_go_iterator(void *_data, u8 *mac, struct ieee80211_vif *vif)
843 {
844 struct iwl_mvm_go_iterator_data *data = _data;
845 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
846
847 if (vif->type == NL80211_IFTYPE_AP && vif->p2p &&
848 mvmvif->ap_ibss_active)
849 data->go_active = true;
850 }
851
852 static int iwl_mvm_mac_ctxt_cmd_p2p_device(struct iwl_mvm *mvm,
853 struct ieee80211_vif *vif,
854 u32 action)
855 {
856 struct iwl_mac_ctx_cmd cmd = {};
857 struct iwl_mvm_go_iterator_data data = {};
858
859 WARN_ON(vif->type != NL80211_IFTYPE_P2P_DEVICE);
860
861 iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, NULL, action);
862
863 cmd.protection_flags |= cpu_to_le32(MAC_PROT_FLG_TGG_PROTECT);
864
865 /* Override the filter flags to accept only probe requests */
866 cmd.filter_flags = cpu_to_le32(MAC_FILTER_IN_PROBE_REQUEST);
867
868 /*
869 * This flag should be set to true when the P2P Device is
870 * discoverable and there is at least another active P2P GO. Settings
871 * this flag will allow the P2P Device to be discoverable on other
872 * channels in addition to its listen channel.
873 * Note that this flag should not be set in other cases as it opens the
874 * Rx filters on all MAC and increases the number of interrupts.
875 */
876 ieee80211_iterate_active_interfaces_atomic(
877 mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
878 iwl_mvm_go_iterator, &data);
879
880 cmd.p2p_dev.is_disc_extended = cpu_to_le32(data.go_active ? 1 : 0);
881 return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd);
882 }
883
884 static void iwl_mvm_mac_ctxt_set_tim(struct iwl_mvm *mvm,
885 __le32 *tim_index, __le32 *tim_size,
886 u8 *beacon, u32 frame_size)
887 {
888 u32 tim_idx;
889 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)beacon;
890
891 /* The index is relative to frame start but we start looking at the
892 * variable-length part of the beacon. */
893 tim_idx = mgmt->u.beacon.variable - beacon;
894
895 /* Parse variable-length elements of beacon to find WLAN_EID_TIM */
896 while ((tim_idx < (frame_size - 2)) &&
897 (beacon[tim_idx] != WLAN_EID_TIM))
898 tim_idx += beacon[tim_idx+1] + 2;
899
900 /* If TIM field was found, set variables */
901 if ((tim_idx < (frame_size - 1)) && (beacon[tim_idx] == WLAN_EID_TIM)) {
902 *tim_index = cpu_to_le32(tim_idx);
903 *tim_size = cpu_to_le32((u32)beacon[tim_idx + 1]);
904 } else {
905 IWL_WARN(mvm, "Unable to find TIM Element in beacon\n");
906 }
907 }
908
909 static u32 iwl_mvm_find_ie_offset(u8 *beacon, u8 eid, u32 frame_size)
910 {
911 struct ieee80211_mgmt *mgmt = (void *)beacon;
912 const u8 *ie;
913
914 if (WARN_ON_ONCE(frame_size <= (mgmt->u.beacon.variable - beacon)))
915 return 0;
916
917 frame_size -= mgmt->u.beacon.variable - beacon;
918
919 ie = cfg80211_find_ie(eid, mgmt->u.beacon.variable, frame_size);
920 if (!ie)
921 return 0;
922
923 return ie - beacon;
924 }
925
926 static u8 iwl_mvm_mac_ctxt_get_lowest_rate(struct ieee80211_tx_info *info,
927 struct ieee80211_vif *vif)
928 {
929 u8 rate;
930
931 if (info->band == NL80211_BAND_5GHZ || vif->p2p)
932 rate = IWL_FIRST_OFDM_RATE;
933 else
934 rate = IWL_FIRST_CCK_RATE;
935
936 return rate;
937 }
938
939 static void iwl_mvm_mac_ctxt_set_tx(struct iwl_mvm *mvm,
940 struct ieee80211_vif *vif,
941 struct sk_buff *beacon,
942 struct iwl_tx_cmd *tx)
943 {
944 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
945 struct ieee80211_tx_info *info;
946 u8 rate;
947 u32 tx_flags;
948
949 info = IEEE80211_SKB_CB(beacon);
950
951 /* Set up TX command fields */
952 tx->len = cpu_to_le16((u16)beacon->len);
953 tx->sta_id = mvmvif->bcast_sta.sta_id;
954 tx->life_time = cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE);
955 tx_flags = TX_CMD_FLG_SEQ_CTL | TX_CMD_FLG_TSF;
956 tx_flags |=
957 iwl_mvm_bt_coex_tx_prio(mvm, (void *)beacon->data, info, 0) <<
958 TX_CMD_FLG_BT_PRIO_POS;
959 tx->tx_flags = cpu_to_le32(tx_flags);
960
961 if (!fw_has_capa(&mvm->fw->ucode_capa,
962 IWL_UCODE_TLV_CAPA_BEACON_ANT_SELECTION)) {
963 mvm->mgmt_last_antenna_idx =
964 iwl_mvm_next_antenna(mvm, iwl_mvm_get_valid_tx_ant(mvm),
965 mvm->mgmt_last_antenna_idx);
966 }
967
968 tx->rate_n_flags =
969 cpu_to_le32(BIT(mvm->mgmt_last_antenna_idx) <<
970 RATE_MCS_ANT_POS);
971
972 rate = iwl_mvm_mac_ctxt_get_lowest_rate(info, vif);
973
974 tx->rate_n_flags |= cpu_to_le32(iwl_mvm_mac80211_idx_to_hwrate(rate));
975 if (rate == IWL_FIRST_CCK_RATE)
976 tx->rate_n_flags |= cpu_to_le32(RATE_MCS_CCK_MSK);
977
978 }
979
980 static int iwl_mvm_mac_ctxt_send_beacon_cmd(struct iwl_mvm *mvm,
981 struct sk_buff *beacon,
982 void *data, int len)
983 {
984 struct iwl_host_cmd cmd = {
985 .id = BEACON_TEMPLATE_CMD,
986 .flags = CMD_ASYNC,
987 };
988
989 cmd.len[0] = len;
990 cmd.data[0] = data;
991 cmd.dataflags[0] = 0;
992 cmd.len[1] = beacon->len;
993 cmd.data[1] = beacon->data;
994 cmd.dataflags[1] = IWL_HCMD_DFL_DUP;
995
996 return iwl_mvm_send_cmd(mvm, &cmd);
997 }
998
999 static int iwl_mvm_mac_ctxt_send_beacon_v6(struct iwl_mvm *mvm,
1000 struct ieee80211_vif *vif,
1001 struct sk_buff *beacon)
1002 {
1003 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1004 struct iwl_mac_beacon_cmd_v6 beacon_cmd = {};
1005
1006 iwl_mvm_mac_ctxt_set_tx(mvm, vif, beacon, &beacon_cmd.tx);
1007
1008 beacon_cmd.template_id = cpu_to_le32((u32)mvmvif->id);
1009
1010 if (vif->type == NL80211_IFTYPE_AP)
1011 iwl_mvm_mac_ctxt_set_tim(mvm, &beacon_cmd.tim_idx,
1012 &beacon_cmd.tim_size,
1013 beacon->data, beacon->len);
1014
1015 return iwl_mvm_mac_ctxt_send_beacon_cmd(mvm, beacon, &beacon_cmd,
1016 sizeof(beacon_cmd));
1017 }
1018
1019 static int iwl_mvm_mac_ctxt_send_beacon_v7(struct iwl_mvm *mvm,
1020 struct ieee80211_vif *vif,
1021 struct sk_buff *beacon)
1022 {
1023 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1024 struct iwl_mac_beacon_cmd_v7 beacon_cmd = {};
1025
1026 iwl_mvm_mac_ctxt_set_tx(mvm, vif, beacon, &beacon_cmd.tx);
1027
1028 beacon_cmd.template_id = cpu_to_le32((u32)mvmvif->id);
1029
1030 if (vif->type == NL80211_IFTYPE_AP)
1031 iwl_mvm_mac_ctxt_set_tim(mvm, &beacon_cmd.tim_idx,
1032 &beacon_cmd.tim_size,
1033 beacon->data, beacon->len);
1034
1035 beacon_cmd.csa_offset =
1036 cpu_to_le32(iwl_mvm_find_ie_offset(beacon->data,
1037 WLAN_EID_CHANNEL_SWITCH,
1038 beacon->len));
1039 beacon_cmd.ecsa_offset =
1040 cpu_to_le32(iwl_mvm_find_ie_offset(beacon->data,
1041 WLAN_EID_EXT_CHANSWITCH_ANN,
1042 beacon->len));
1043
1044 return iwl_mvm_mac_ctxt_send_beacon_cmd(mvm, beacon, &beacon_cmd,
1045 sizeof(beacon_cmd));
1046 }
1047
1048 static int iwl_mvm_mac_ctxt_send_beacon_v9(struct iwl_mvm *mvm,
1049 struct ieee80211_vif *vif,
1050 struct sk_buff *beacon)
1051 {
1052 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1053 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(beacon);
1054 struct iwl_mac_beacon_cmd beacon_cmd = {};
1055 u8 rate = iwl_mvm_mac_ctxt_get_lowest_rate(info, vif);
1056 u16 flags;
1057
1058 flags = iwl_mvm_mac80211_idx_to_hwrate(rate);
1059
1060 if (rate == IWL_FIRST_CCK_RATE)
1061 flags |= IWL_MAC_BEACON_CCK;
1062
1063 beacon_cmd.flags = cpu_to_le16(flags);
1064 beacon_cmd.byte_cnt = cpu_to_le16((u16)beacon->len);
1065 beacon_cmd.template_id = cpu_to_le32((u32)mvmvif->id);
1066
1067 if (vif->type == NL80211_IFTYPE_AP)
1068 iwl_mvm_mac_ctxt_set_tim(mvm, &beacon_cmd.tim_idx,
1069 &beacon_cmd.tim_size,
1070 beacon->data, beacon->len);
1071
1072 beacon_cmd.csa_offset =
1073 cpu_to_le32(iwl_mvm_find_ie_offset(beacon->data,
1074 WLAN_EID_CHANNEL_SWITCH,
1075 beacon->len));
1076 beacon_cmd.ecsa_offset =
1077 cpu_to_le32(iwl_mvm_find_ie_offset(beacon->data,
1078 WLAN_EID_EXT_CHANSWITCH_ANN,
1079 beacon->len));
1080
1081 return iwl_mvm_mac_ctxt_send_beacon_cmd(mvm, beacon, &beacon_cmd,
1082 sizeof(beacon_cmd));
1083 }
1084
1085 static int iwl_mvm_mac_ctxt_send_beacon(struct iwl_mvm *mvm,
1086 struct ieee80211_vif *vif,
1087 struct sk_buff *beacon)
1088 {
1089 if (WARN_ON(!beacon))
1090 return -EINVAL;
1091
1092 if (!fw_has_capa(&mvm->fw->ucode_capa,
1093 IWL_UCODE_TLV_CAPA_CSA_AND_TBTT_OFFLOAD))
1094 return iwl_mvm_mac_ctxt_send_beacon_v6(mvm, vif, beacon);
1095
1096 if (fw_has_api(&mvm->fw->ucode_capa,
1097 IWL_UCODE_TLV_API_NEW_BEACON_TEMPLATE))
1098 return iwl_mvm_mac_ctxt_send_beacon_v9(mvm, vif, beacon);
1099
1100 return iwl_mvm_mac_ctxt_send_beacon_v7(mvm, vif, beacon);
1101 }
1102
1103 /* The beacon template for the AP/GO/IBSS has changed and needs update */
1104 int iwl_mvm_mac_ctxt_beacon_changed(struct iwl_mvm *mvm,
1105 struct ieee80211_vif *vif)
1106 {
1107 struct sk_buff *beacon;
1108 int ret;
1109
1110 WARN_ON(vif->type != NL80211_IFTYPE_AP &&
1111 vif->type != NL80211_IFTYPE_ADHOC);
1112
1113 beacon = ieee80211_beacon_get_template(mvm->hw, vif, NULL);
1114 if (!beacon)
1115 return -ENOMEM;
1116
1117 ret = iwl_mvm_mac_ctxt_send_beacon(mvm, vif, beacon);
1118 dev_kfree_skb(beacon);
1119 return ret;
1120 }
1121
1122 struct iwl_mvm_mac_ap_iterator_data {
1123 struct iwl_mvm *mvm;
1124 struct ieee80211_vif *vif;
1125 u32 beacon_device_ts;
1126 u16 beacon_int;
1127 };
1128
1129 /* Find the beacon_device_ts and beacon_int for a managed interface */
1130 static void iwl_mvm_mac_ap_iterator(void *_data, u8 *mac,
1131 struct ieee80211_vif *vif)
1132 {
1133 struct iwl_mvm_mac_ap_iterator_data *data = _data;
1134
1135 if (vif->type != NL80211_IFTYPE_STATION || !vif->bss_conf.assoc)
1136 return;
1137
1138 /* Station client has higher priority over P2P client*/
1139 if (vif->p2p && data->beacon_device_ts)
1140 return;
1141
1142 data->beacon_device_ts = vif->bss_conf.sync_device_ts;
1143 data->beacon_int = vif->bss_conf.beacon_int;
1144 }
1145
1146 /*
1147 * Fill the specific data for mac context of type AP of P2P GO
1148 */
1149 static void iwl_mvm_mac_ctxt_cmd_fill_ap(struct iwl_mvm *mvm,
1150 struct ieee80211_vif *vif,
1151 struct iwl_mac_ctx_cmd *cmd,
1152 struct iwl_mac_data_ap *ctxt_ap,
1153 bool add)
1154 {
1155 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1156 struct iwl_mvm_mac_ap_iterator_data data = {
1157 .mvm = mvm,
1158 .vif = vif,
1159 .beacon_device_ts = 0
1160 };
1161
1162 /* in AP mode, the MCAST FIFO takes the EDCA params from VO */
1163 cmd->ac[IWL_MVM_TX_FIFO_VO].fifos_mask |= BIT(IWL_MVM_TX_FIFO_MCAST);
1164
1165 /*
1166 * in AP mode, pass probe requests and beacons from other APs
1167 * (needed for ht protection); when there're no any associated
1168 * station don't ask FW to pass beacons to prevent unnecessary
1169 * wake-ups.
1170 */
1171 cmd->filter_flags |= cpu_to_le32(MAC_FILTER_IN_PROBE_REQUEST);
1172 if (mvmvif->ap_assoc_sta_count || !mvm->drop_bcn_ap_mode) {
1173 cmd->filter_flags |= cpu_to_le32(MAC_FILTER_IN_BEACON);
1174 IWL_DEBUG_HC(mvm, "Asking FW to pass beacons\n");
1175 } else {
1176 IWL_DEBUG_HC(mvm, "No need to receive beacons\n");
1177 }
1178
1179 ctxt_ap->bi = cpu_to_le32(vif->bss_conf.beacon_int);
1180 ctxt_ap->bi_reciprocal =
1181 cpu_to_le32(iwl_mvm_reciprocal(vif->bss_conf.beacon_int));
1182 ctxt_ap->dtim_interval = cpu_to_le32(vif->bss_conf.beacon_int *
1183 vif->bss_conf.dtim_period);
1184 ctxt_ap->dtim_reciprocal =
1185 cpu_to_le32(iwl_mvm_reciprocal(vif->bss_conf.beacon_int *
1186 vif->bss_conf.dtim_period));
1187
1188 if (!fw_has_api(&mvm->fw->ucode_capa,
1189 IWL_UCODE_TLV_API_STA_TYPE))
1190 ctxt_ap->mcast_qid = cpu_to_le32(vif->cab_queue);
1191
1192 /*
1193 * Only set the beacon time when the MAC is being added, when we
1194 * just modify the MAC then we should keep the time -- the firmware
1195 * can otherwise have a "jumping" TBTT.
1196 */
1197 if (add) {
1198 /*
1199 * If there is a station/P2P client interface which is
1200 * associated, set the AP's TBTT far enough from the station's
1201 * TBTT. Otherwise, set it to the current system time
1202 */
1203 ieee80211_iterate_active_interfaces_atomic(
1204 mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
1205 iwl_mvm_mac_ap_iterator, &data);
1206
1207 if (data.beacon_device_ts) {
1208 u32 rand = (prandom_u32() % (64 - 36)) + 36;
1209 mvmvif->ap_beacon_time = data.beacon_device_ts +
1210 ieee80211_tu_to_usec(data.beacon_int * rand /
1211 100);
1212 } else {
1213 mvmvif->ap_beacon_time =
1214 iwl_read_prph(mvm->trans,
1215 DEVICE_SYSTEM_TIME_REG);
1216 }
1217 }
1218
1219 ctxt_ap->beacon_time = cpu_to_le32(mvmvif->ap_beacon_time);
1220 ctxt_ap->beacon_tsf = 0; /* unused */
1221
1222 /* TODO: Assume that the beacon id == mac context id */
1223 ctxt_ap->beacon_template = cpu_to_le32(mvmvif->id);
1224 }
1225
1226 static int iwl_mvm_mac_ctxt_cmd_ap(struct iwl_mvm *mvm,
1227 struct ieee80211_vif *vif,
1228 u32 action)
1229 {
1230 struct iwl_mac_ctx_cmd cmd = {};
1231
1232 WARN_ON(vif->type != NL80211_IFTYPE_AP || vif->p2p);
1233
1234 /* Fill the common data for all mac context types */
1235 iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, NULL, action);
1236
1237 /* Fill the data specific for ap mode */
1238 iwl_mvm_mac_ctxt_cmd_fill_ap(mvm, vif, &cmd, &cmd.ap,
1239 action == FW_CTXT_ACTION_ADD);
1240
1241 return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd);
1242 }
1243
1244 static int iwl_mvm_mac_ctxt_cmd_go(struct iwl_mvm *mvm,
1245 struct ieee80211_vif *vif,
1246 u32 action)
1247 {
1248 struct iwl_mac_ctx_cmd cmd = {};
1249 struct ieee80211_p2p_noa_attr *noa = &vif->bss_conf.p2p_noa_attr;
1250
1251 WARN_ON(vif->type != NL80211_IFTYPE_AP || !vif->p2p);
1252
1253 /* Fill the common data for all mac context types */
1254 iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, NULL, action);
1255
1256 /* Fill the data specific for GO mode */
1257 iwl_mvm_mac_ctxt_cmd_fill_ap(mvm, vif, &cmd, &cmd.go.ap,
1258 action == FW_CTXT_ACTION_ADD);
1259
1260 cmd.go.ctwin = cpu_to_le32(noa->oppps_ctwindow &
1261 IEEE80211_P2P_OPPPS_CTWINDOW_MASK);
1262 cmd.go.opp_ps_enabled =
1263 cpu_to_le32(!!(noa->oppps_ctwindow &
1264 IEEE80211_P2P_OPPPS_ENABLE_BIT));
1265
1266 return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd);
1267 }
1268
1269 static int iwl_mvm_mac_ctx_send(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1270 u32 action, bool force_assoc_off,
1271 const u8 *bssid_override)
1272 {
1273 switch (vif->type) {
1274 case NL80211_IFTYPE_STATION:
1275 return iwl_mvm_mac_ctxt_cmd_sta(mvm, vif, action,
1276 force_assoc_off,
1277 bssid_override);
1278 break;
1279 case NL80211_IFTYPE_AP:
1280 if (!vif->p2p)
1281 return iwl_mvm_mac_ctxt_cmd_ap(mvm, vif, action);
1282 else
1283 return iwl_mvm_mac_ctxt_cmd_go(mvm, vif, action);
1284 break;
1285 case NL80211_IFTYPE_MONITOR:
1286 return iwl_mvm_mac_ctxt_cmd_listener(mvm, vif, action);
1287 case NL80211_IFTYPE_P2P_DEVICE:
1288 return iwl_mvm_mac_ctxt_cmd_p2p_device(mvm, vif, action);
1289 case NL80211_IFTYPE_ADHOC:
1290 return iwl_mvm_mac_ctxt_cmd_ibss(mvm, vif, action);
1291 default:
1292 break;
1293 }
1294
1295 return -EOPNOTSUPP;
1296 }
1297
1298 int iwl_mvm_mac_ctxt_add(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1299 {
1300 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1301 int ret;
1302
1303 if (WARN_ONCE(mvmvif->uploaded, "Adding active MAC %pM/%d\n",
1304 vif->addr, ieee80211_vif_type_p2p(vif)))
1305 return -EIO;
1306
1307 ret = iwl_mvm_mac_ctx_send(mvm, vif, FW_CTXT_ACTION_ADD,
1308 true, NULL);
1309 if (ret)
1310 return ret;
1311
1312 /* will only do anything at resume from D3 time */
1313 iwl_mvm_set_last_nonqos_seq(mvm, vif);
1314
1315 mvmvif->uploaded = true;
1316 return 0;
1317 }
1318
1319 int iwl_mvm_mac_ctxt_changed(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1320 bool force_assoc_off, const u8 *bssid_override)
1321 {
1322 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1323
1324 if (WARN_ONCE(!mvmvif->uploaded, "Changing inactive MAC %pM/%d\n",
1325 vif->addr, ieee80211_vif_type_p2p(vif)))
1326 return -EIO;
1327
1328 return iwl_mvm_mac_ctx_send(mvm, vif, FW_CTXT_ACTION_MODIFY,
1329 force_assoc_off, bssid_override);
1330 }
1331
1332 int iwl_mvm_mac_ctxt_remove(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1333 {
1334 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1335 struct iwl_mac_ctx_cmd cmd;
1336 int ret;
1337
1338 if (WARN_ONCE(!mvmvif->uploaded, "Removing inactive MAC %pM/%d\n",
1339 vif->addr, ieee80211_vif_type_p2p(vif)))
1340 return -EIO;
1341
1342 memset(&cmd, 0, sizeof(cmd));
1343
1344 cmd.id_and_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id,
1345 mvmvif->color));
1346 cmd.action = cpu_to_le32(FW_CTXT_ACTION_REMOVE);
1347
1348 ret = iwl_mvm_send_cmd_pdu(mvm, MAC_CONTEXT_CMD, 0,
1349 sizeof(cmd), &cmd);
1350 if (ret) {
1351 IWL_ERR(mvm, "Failed to remove MAC context: %d\n", ret);
1352 return ret;
1353 }
1354
1355 mvmvif->uploaded = false;
1356
1357 if (vif->type == NL80211_IFTYPE_MONITOR) {
1358 __clear_bit(IEEE80211_HW_RX_INCLUDES_FCS, mvm->hw->flags);
1359 iwl_mvm_dealloc_snif_sta(mvm);
1360 }
1361
1362 return 0;
1363 }
1364
1365 static void iwl_mvm_csa_count_down(struct iwl_mvm *mvm,
1366 struct ieee80211_vif *csa_vif, u32 gp2,
1367 bool tx_success)
1368 {
1369 struct iwl_mvm_vif *mvmvif =
1370 iwl_mvm_vif_from_mac80211(csa_vif);
1371
1372 /* Don't start to countdown from a failed beacon */
1373 if (!tx_success && !mvmvif->csa_countdown)
1374 return;
1375
1376 mvmvif->csa_countdown = true;
1377
1378 if (!ieee80211_csa_is_complete(csa_vif)) {
1379 int c = ieee80211_csa_update_counter(csa_vif);
1380
1381 iwl_mvm_mac_ctxt_beacon_changed(mvm, csa_vif);
1382 if (csa_vif->p2p &&
1383 !iwl_mvm_te_scheduled(&mvmvif->time_event_data) && gp2 &&
1384 tx_success) {
1385 u32 rel_time = (c + 1) *
1386 csa_vif->bss_conf.beacon_int -
1387 IWL_MVM_CHANNEL_SWITCH_TIME_GO;
1388 u32 apply_time = gp2 + rel_time * 1024;
1389
1390 iwl_mvm_schedule_csa_period(mvm, csa_vif,
1391 IWL_MVM_CHANNEL_SWITCH_TIME_GO -
1392 IWL_MVM_CHANNEL_SWITCH_MARGIN,
1393 apply_time);
1394 }
1395 } else if (!iwl_mvm_te_scheduled(&mvmvif->time_event_data)) {
1396 /* we don't have CSA NoA scheduled yet, switch now */
1397 ieee80211_csa_finish(csa_vif);
1398 RCU_INIT_POINTER(mvm->csa_vif, NULL);
1399 }
1400 }
1401
1402 void iwl_mvm_rx_beacon_notif(struct iwl_mvm *mvm,
1403 struct iwl_rx_cmd_buffer *rxb)
1404 {
1405 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1406 struct iwl_extended_beacon_notif *beacon = (void *)pkt->data;
1407 struct iwl_mvm_tx_resp *beacon_notify_hdr;
1408 struct ieee80211_vif *csa_vif;
1409 struct ieee80211_vif *tx_blocked_vif;
1410 struct agg_tx_status *agg_status;
1411 u16 status;
1412
1413 lockdep_assert_held(&mvm->mutex);
1414
1415 beacon_notify_hdr = &beacon->beacon_notify_hdr;
1416 mvm->ap_last_beacon_gp2 = le32_to_cpu(beacon->gp2);
1417 mvm->ibss_manager = beacon->ibss_mgr_status != 0;
1418
1419 agg_status = iwl_mvm_get_agg_status(mvm, beacon_notify_hdr);
1420 status = le16_to_cpu(agg_status->status) & TX_STATUS_MSK;
1421 IWL_DEBUG_RX(mvm,
1422 "beacon status %#x retries:%d tsf:0x%16llX gp2:0x%X rate:%d\n",
1423 status, beacon_notify_hdr->failure_frame,
1424 le64_to_cpu(beacon->tsf),
1425 mvm->ap_last_beacon_gp2,
1426 le32_to_cpu(beacon_notify_hdr->initial_rate));
1427
1428 csa_vif = rcu_dereference_protected(mvm->csa_vif,
1429 lockdep_is_held(&mvm->mutex));
1430 if (unlikely(csa_vif && csa_vif->csa_active))
1431 iwl_mvm_csa_count_down(mvm, csa_vif, mvm->ap_last_beacon_gp2,
1432 (status == TX_STATUS_SUCCESS));
1433
1434 tx_blocked_vif = rcu_dereference_protected(mvm->csa_tx_blocked_vif,
1435 lockdep_is_held(&mvm->mutex));
1436 if (unlikely(tx_blocked_vif)) {
1437 struct iwl_mvm_vif *mvmvif =
1438 iwl_mvm_vif_from_mac80211(tx_blocked_vif);
1439
1440 /*
1441 * The channel switch is started and we have blocked the
1442 * stations. If this is the first beacon (the timeout wasn't
1443 * set), set the unblock timeout, otherwise countdown
1444 */
1445 if (!mvm->csa_tx_block_bcn_timeout)
1446 mvm->csa_tx_block_bcn_timeout =
1447 IWL_MVM_CS_UNBLOCK_TX_TIMEOUT;
1448 else
1449 mvm->csa_tx_block_bcn_timeout--;
1450
1451 /* Check if the timeout is expired, and unblock tx */
1452 if (mvm->csa_tx_block_bcn_timeout == 0) {
1453 iwl_mvm_modify_all_sta_disable_tx(mvm, mvmvif, false);
1454 RCU_INIT_POINTER(mvm->csa_tx_blocked_vif, NULL);
1455 }
1456 }
1457 }
1458
1459 static void iwl_mvm_beacon_loss_iterator(void *_data, u8 *mac,
1460 struct ieee80211_vif *vif)
1461 {
1462 struct iwl_missed_beacons_notif *missed_beacons = _data;
1463 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1464 struct iwl_mvm *mvm = mvmvif->mvm;
1465 struct iwl_fw_dbg_trigger_missed_bcon *bcon_trig;
1466 struct iwl_fw_dbg_trigger_tlv *trigger;
1467 u32 stop_trig_missed_bcon, stop_trig_missed_bcon_since_rx;
1468 u32 rx_missed_bcon, rx_missed_bcon_since_rx;
1469
1470 if (mvmvif->id != (u16)le32_to_cpu(missed_beacons->mac_id))
1471 return;
1472
1473 rx_missed_bcon = le32_to_cpu(missed_beacons->consec_missed_beacons);
1474 rx_missed_bcon_since_rx =
1475 le32_to_cpu(missed_beacons->consec_missed_beacons_since_last_rx);
1476 /*
1477 * TODO: the threshold should be adjusted based on latency conditions,
1478 * and/or in case of a CS flow on one of the other AP vifs.
1479 */
1480 if (le32_to_cpu(missed_beacons->consec_missed_beacons_since_last_rx) >
1481 IWL_MVM_MISSED_BEACONS_THRESHOLD)
1482 ieee80211_beacon_loss(vif);
1483
1484 if (!iwl_fw_dbg_trigger_enabled(mvm->fw,
1485 FW_DBG_TRIGGER_MISSED_BEACONS))
1486 return;
1487
1488 trigger = iwl_fw_dbg_get_trigger(mvm->fw,
1489 FW_DBG_TRIGGER_MISSED_BEACONS);
1490 bcon_trig = (void *)trigger->data;
1491 stop_trig_missed_bcon = le32_to_cpu(bcon_trig->stop_consec_missed_bcon);
1492 stop_trig_missed_bcon_since_rx =
1493 le32_to_cpu(bcon_trig->stop_consec_missed_bcon_since_rx);
1494
1495 /* TODO: implement start trigger */
1496
1497 if (!iwl_fw_dbg_trigger_check_stop(&mvm->fwrt,
1498 ieee80211_vif_to_wdev(vif),
1499 trigger))
1500 return;
1501
1502 if (rx_missed_bcon_since_rx >= stop_trig_missed_bcon_since_rx ||
1503 rx_missed_bcon >= stop_trig_missed_bcon)
1504 iwl_fw_dbg_collect_trig(&mvm->fwrt, trigger, NULL);
1505 }
1506
1507 void iwl_mvm_rx_missed_beacons_notif(struct iwl_mvm *mvm,
1508 struct iwl_rx_cmd_buffer *rxb)
1509 {
1510 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1511 struct iwl_missed_beacons_notif *mb = (void *)pkt->data;
1512
1513 IWL_DEBUG_INFO(mvm,
1514 "missed bcn mac_id=%u, consecutive=%u (%u, %u, %u)\n",
1515 le32_to_cpu(mb->mac_id),
1516 le32_to_cpu(mb->consec_missed_beacons),
1517 le32_to_cpu(mb->consec_missed_beacons_since_last_rx),
1518 le32_to_cpu(mb->num_recvd_beacons),
1519 le32_to_cpu(mb->num_expected_beacons));
1520
1521 ieee80211_iterate_active_interfaces_atomic(mvm->hw,
1522 IEEE80211_IFACE_ITER_NORMAL,
1523 iwl_mvm_beacon_loss_iterator,
1524 mb);
1525 }
1526
1527 void iwl_mvm_rx_stored_beacon_notif(struct iwl_mvm *mvm,
1528 struct iwl_rx_cmd_buffer *rxb)
1529 {
1530 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1531 struct iwl_stored_beacon_notif *sb = (void *)pkt->data;
1532 struct ieee80211_rx_status rx_status;
1533 struct sk_buff *skb;
1534 u32 size = le32_to_cpu(sb->byte_count);
1535
1536 if (size == 0)
1537 return;
1538
1539 skb = alloc_skb(size, GFP_ATOMIC);
1540 if (!skb) {
1541 IWL_ERR(mvm, "alloc_skb failed\n");
1542 return;
1543 }
1544
1545 /* update rx_status according to the notification's metadata */
1546 memset(&rx_status, 0, sizeof(rx_status));
1547 rx_status.mactime = le64_to_cpu(sb->tsf);
1548 /* TSF as indicated by the firmware is at INA time */
1549 rx_status.flag |= RX_FLAG_MACTIME_PLCP_START;
1550 rx_status.device_timestamp = le32_to_cpu(sb->system_time);
1551 rx_status.band =
1552 (sb->band & cpu_to_le16(RX_RES_PHY_FLAGS_BAND_24)) ?
1553 NL80211_BAND_2GHZ : NL80211_BAND_5GHZ;
1554 rx_status.freq =
1555 ieee80211_channel_to_frequency(le16_to_cpu(sb->channel),
1556 rx_status.band);
1557
1558 /* copy the data */
1559 skb_put_data(skb, sb->data, size);
1560 memcpy(IEEE80211_SKB_RXCB(skb), &rx_status, sizeof(rx_status));
1561
1562 /* pass it as regular rx to mac80211 */
1563 ieee80211_rx_napi(mvm->hw, NULL, skb, NULL);
1564 }
1565
1566 void iwl_mvm_channel_switch_noa_notif(struct iwl_mvm *mvm,
1567 struct iwl_rx_cmd_buffer *rxb)
1568 {
1569 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1570 struct iwl_channel_switch_noa_notif *notif = (void *)pkt->data;
1571 struct ieee80211_vif *csa_vif;
1572 struct iwl_mvm_vif *mvmvif;
1573 int len = iwl_rx_packet_payload_len(pkt);
1574 u32 id_n_color;
1575
1576 if (WARN_ON_ONCE(len < sizeof(*notif)))
1577 return;
1578
1579 rcu_read_lock();
1580
1581 csa_vif = rcu_dereference(mvm->csa_vif);
1582 if (WARN_ON(!csa_vif || !csa_vif->csa_active))
1583 goto out_unlock;
1584
1585 id_n_color = le32_to_cpu(notif->id_and_color);
1586
1587 mvmvif = iwl_mvm_vif_from_mac80211(csa_vif);
1588 if (WARN(FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color) != id_n_color,
1589 "channel switch noa notification on unexpected vif (csa_vif=%d, notif=%d)",
1590 FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color), id_n_color))
1591 goto out_unlock;
1592
1593 IWL_DEBUG_INFO(mvm, "Channel Switch Started Notification\n");
1594
1595 schedule_delayed_work(&mvm->cs_tx_unblock_dwork,
1596 msecs_to_jiffies(IWL_MVM_CS_UNBLOCK_TX_TIMEOUT *
1597 csa_vif->bss_conf.beacon_int));
1598
1599 ieee80211_csa_finish(csa_vif);
1600
1601 rcu_read_unlock();
1602
1603 RCU_INIT_POINTER(mvm->csa_vif, NULL);
1604
1605 return;
1606
1607 out_unlock:
1608 rcu_read_unlock();
1609 }
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