projects / deliverable / linux.git / blob
? search:


5350ca6f1f1d7a370fd6c7a920b5f1b1903a2873
[deliverable/linux.git] / drivers / net / wireless / intel / 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 * Copyright(c) 2016 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 - 2015 Intel Corporation. All rights reserved.
36 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
37 * Copyright(c) 2016 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 #include <net/mac80211.h>
68
69 #include "mvm.h"
70 #include "sta.h"
71 #include "rs.h"
72
73 /*
74 * New version of ADD_STA_sta command added new fields at the end of the
75 * structure, so sending the size of the relevant API's structure is enough to
76 * support both API versions.
77 */
78 static inline int iwl_mvm_add_sta_cmd_size(struct iwl_mvm *mvm)
79 {
80 return iwl_mvm_has_new_rx_api(mvm) ?
81 sizeof(struct iwl_mvm_add_sta_cmd) :
82 sizeof(struct iwl_mvm_add_sta_cmd_v7);
83 }
84
85 static int iwl_mvm_find_free_sta_id(struct iwl_mvm *mvm,
86 enum nl80211_iftype iftype)
87 {
88 int sta_id;
89 u32 reserved_ids = 0;
90
91 BUILD_BUG_ON(IWL_MVM_STATION_COUNT > 32);
92 WARN_ON_ONCE(test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status));
93
94 lockdep_assert_held(&mvm->mutex);
95
96 /* d0i3/d3 assumes the AP's sta_id (of sta vif) is 0. reserve it. */
97 if (iftype != NL80211_IFTYPE_STATION)
98 reserved_ids = BIT(0);
99
100 /* Don't take rcu_read_lock() since we are protected by mvm->mutex */
101 for (sta_id = 0; sta_id < IWL_MVM_STATION_COUNT; sta_id++) {
102 if (BIT(sta_id) & reserved_ids)
103 continue;
104
105 if (!rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
106 lockdep_is_held(&mvm->mutex)))
107 return sta_id;
108 }
109 return IWL_MVM_STATION_COUNT;
110 }
111
112 /* send station add/update command to firmware */
113 int iwl_mvm_sta_send_to_fw(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
114 bool update, unsigned int flags)
115 {
116 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
117 struct iwl_mvm_add_sta_cmd add_sta_cmd = {
118 .sta_id = mvm_sta->sta_id,
119 .mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color),
120 .add_modify = update ? 1 : 0,
121 .station_flags_msk = cpu_to_le32(STA_FLG_FAT_EN_MSK |
122 STA_FLG_MIMO_EN_MSK),
123 .tid_disable_tx = cpu_to_le16(mvm_sta->tid_disable_agg),
124 };
125 int ret;
126 u32 status;
127 u32 agg_size = 0, mpdu_dens = 0;
128
129 if (!update || (flags & STA_MODIFY_QUEUES)) {
130 add_sta_cmd.tfd_queue_msk = cpu_to_le32(mvm_sta->tfd_queue_msk);
131 memcpy(&add_sta_cmd.addr, sta->addr, ETH_ALEN);
132
133 if (flags & STA_MODIFY_QUEUES)
134 add_sta_cmd.modify_mask |= STA_MODIFY_QUEUES;
135 }
136
137 switch (sta->bandwidth) {
138 case IEEE80211_STA_RX_BW_160:
139 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_160MHZ);
140 /* fall through */
141 case IEEE80211_STA_RX_BW_80:
142 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_80MHZ);
143 /* fall through */
144 case IEEE80211_STA_RX_BW_40:
145 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_40MHZ);
146 /* fall through */
147 case IEEE80211_STA_RX_BW_20:
148 if (sta->ht_cap.ht_supported)
149 add_sta_cmd.station_flags |=
150 cpu_to_le32(STA_FLG_FAT_EN_20MHZ);
151 break;
152 }
153
154 switch (sta->rx_nss) {
155 case 1:
156 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_SISO);
157 break;
158 case 2:
159 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_MIMO2);
160 break;
161 case 3 ... 8:
162 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_MIMO3);
163 break;
164 }
165
166 switch (sta->smps_mode) {
167 case IEEE80211_SMPS_AUTOMATIC:
168 case IEEE80211_SMPS_NUM_MODES:
169 WARN_ON(1);
170 break;
171 case IEEE80211_SMPS_STATIC:
172 /* override NSS */
173 add_sta_cmd.station_flags &= ~cpu_to_le32(STA_FLG_MIMO_EN_MSK);
174 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_SISO);
175 break;
176 case IEEE80211_SMPS_DYNAMIC:
177 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_RTS_MIMO_PROT);
178 break;
179 case IEEE80211_SMPS_OFF:
180 /* nothing */
181 break;
182 }
183
184 if (sta->ht_cap.ht_supported) {
185 add_sta_cmd.station_flags_msk |=
186 cpu_to_le32(STA_FLG_MAX_AGG_SIZE_MSK |
187 STA_FLG_AGG_MPDU_DENS_MSK);
188
189 mpdu_dens = sta->ht_cap.ampdu_density;
190 }
191
192 if (sta->vht_cap.vht_supported) {
193 agg_size = sta->vht_cap.cap &
194 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK;
195 agg_size >>=
196 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_SHIFT;
197 } else if (sta->ht_cap.ht_supported) {
198 agg_size = sta->ht_cap.ampdu_factor;
199 }
200
201 add_sta_cmd.station_flags |=
202 cpu_to_le32(agg_size << STA_FLG_MAX_AGG_SIZE_SHIFT);
203 add_sta_cmd.station_flags |=
204 cpu_to_le32(mpdu_dens << STA_FLG_AGG_MPDU_DENS_SHIFT);
205
206 status = ADD_STA_SUCCESS;
207 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
208 iwl_mvm_add_sta_cmd_size(mvm),
209 &add_sta_cmd, &status);
210 if (ret)
211 return ret;
212
213 switch (status & IWL_ADD_STA_STATUS_MASK) {
214 case ADD_STA_SUCCESS:
215 IWL_DEBUG_ASSOC(mvm, "ADD_STA PASSED\n");
216 break;
217 default:
218 ret = -EIO;
219 IWL_ERR(mvm, "ADD_STA failed\n");
220 break;
221 }
222
223 return ret;
224 }
225
226 static int iwl_mvm_tdls_sta_init(struct iwl_mvm *mvm,
227 struct ieee80211_sta *sta)
228 {
229 unsigned long used_hw_queues;
230 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
231 unsigned int wdg_timeout =
232 iwl_mvm_get_wd_timeout(mvm, NULL, true, false);
233 u32 ac;
234
235 lockdep_assert_held(&mvm->mutex);
236
237 used_hw_queues = iwl_mvm_get_used_hw_queues(mvm, NULL);
238
239 /* Find available queues, and allocate them to the ACs */
240 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
241 u8 queue = find_first_zero_bit(&used_hw_queues,
242 mvm->first_agg_queue);
243
244 if (queue >= mvm->first_agg_queue) {
245 IWL_ERR(mvm, "Failed to allocate STA queue\n");
246 return -EBUSY;
247 }
248
249 __set_bit(queue, &used_hw_queues);
250 mvmsta->hw_queue[ac] = queue;
251 }
252
253 /* Found a place for all queues - enable them */
254 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
255 iwl_mvm_enable_ac_txq(mvm, mvmsta->hw_queue[ac],
256 mvmsta->hw_queue[ac],
257 iwl_mvm_ac_to_tx_fifo[ac], 0,
258 wdg_timeout);
259 mvmsta->tfd_queue_msk |= BIT(mvmsta->hw_queue[ac]);
260 }
261
262 return 0;
263 }
264
265 static void iwl_mvm_tdls_sta_deinit(struct iwl_mvm *mvm,
266 struct ieee80211_sta *sta)
267 {
268 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
269 unsigned long sta_msk;
270 int i;
271
272 lockdep_assert_held(&mvm->mutex);
273
274 /* disable the TDLS STA-specific queues */
275 sta_msk = mvmsta->tfd_queue_msk;
276 for_each_set_bit(i, &sta_msk, sizeof(sta_msk) * BITS_PER_BYTE)
277 iwl_mvm_disable_txq(mvm, i, i, IWL_MAX_TID_COUNT, 0);
278 }
279
280 static int iwl_mvm_sta_alloc_queue(struct iwl_mvm *mvm,
281 struct ieee80211_sta *sta, u8 ac, int tid,
282 struct ieee80211_hdr *hdr)
283 {
284 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
285 struct iwl_trans_txq_scd_cfg cfg = {
286 .fifo = iwl_mvm_ac_to_tx_fifo[ac],
287 .sta_id = mvmsta->sta_id,
288 .tid = tid,
289 .frame_limit = IWL_FRAME_LIMIT,
290 };
291 unsigned int wdg_timeout =
292 iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false);
293 u8 mac_queue = mvmsta->vif->hw_queue[ac];
294 int queue = -1;
295 int ssn;
296
297 lockdep_assert_held(&mvm->mutex);
298
299 spin_lock_bh(&mvm->queue_info_lock);
300
301 /*
302 * Non-QoS, QoS NDP and MGMT frames should go to a MGMT queue, if one
303 * exists
304 */
305 if (!ieee80211_is_data_qos(hdr->frame_control) ||
306 ieee80211_is_qos_nullfunc(hdr->frame_control)) {
307 queue = iwl_mvm_find_free_queue(mvm, IWL_MVM_DQA_MIN_MGMT_QUEUE,
308 IWL_MVM_DQA_MAX_MGMT_QUEUE);
309 if (queue >= IWL_MVM_DQA_MIN_MGMT_QUEUE)
310 IWL_DEBUG_TX_QUEUES(mvm, "Found free MGMT queue #%d\n",
311 queue);
312
313 /* If no such queue is found, we'll use a DATA queue instead */
314 }
315
316 if (queue < 0 && mvmsta->reserved_queue != IEEE80211_INVAL_HW_QUEUE) {
317 queue = mvmsta->reserved_queue;
318 IWL_DEBUG_TX_QUEUES(mvm, "Using reserved queue #%d\n", queue);
319 }
320
321 if (queue < 0)
322 queue = iwl_mvm_find_free_queue(mvm, IWL_MVM_DQA_MIN_DATA_QUEUE,
323 IWL_MVM_DQA_MAX_DATA_QUEUE);
324 if (queue >= 0)
325 mvm->queue_info[queue].setup_reserved = false;
326
327 spin_unlock_bh(&mvm->queue_info_lock);
328
329 /* TODO: support shared queues for same RA */
330 if (queue < 0)
331 return -ENOSPC;
332
333 /*
334 * Actual en/disablement of aggregations is through the ADD_STA HCMD,
335 * but for configuring the SCD to send A-MPDUs we need to mark the queue
336 * as aggregatable.
337 * Mark all DATA queues as allowing to be aggregated at some point
338 */
339 cfg.aggregate = (queue >= IWL_MVM_DQA_MIN_DATA_QUEUE ||
340 queue == IWL_MVM_DQA_BSS_CLIENT_QUEUE);
341
342 IWL_DEBUG_TX_QUEUES(mvm, "Allocating queue #%d to sta %d on tid %d\n",
343 queue, mvmsta->sta_id, tid);
344
345 ssn = IEEE80211_SEQ_TO_SN(le16_to_cpu(hdr->seq_ctrl));
346 iwl_mvm_enable_txq(mvm, queue, mac_queue, ssn, &cfg,
347 wdg_timeout);
348
349 spin_lock_bh(&mvmsta->lock);
350 mvmsta->tid_data[tid].txq_id = queue;
351 mvmsta->tfd_queue_msk |= BIT(queue);
352
353 if (mvmsta->reserved_queue == queue)
354 mvmsta->reserved_queue = IEEE80211_INVAL_HW_QUEUE;
355 spin_unlock_bh(&mvmsta->lock);
356
357 return iwl_mvm_sta_send_to_fw(mvm, sta, true, STA_MODIFY_QUEUES);
358 }
359
360 static inline u8 iwl_mvm_tid_to_ac_queue(int tid)
361 {
362 if (tid == IWL_MAX_TID_COUNT)
363 return IEEE80211_AC_VO; /* MGMT */
364
365 return tid_to_mac80211_ac[tid];
366 }
367
368 static void iwl_mvm_tx_deferred_stream(struct iwl_mvm *mvm,
369 struct ieee80211_sta *sta, int tid)
370 {
371 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
372 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
373 struct sk_buff *skb;
374 struct ieee80211_hdr *hdr;
375 struct sk_buff_head deferred_tx;
376 u8 mac_queue;
377 bool no_queue = false; /* Marks if there is a problem with the queue */
378 u8 ac;
379
380 lockdep_assert_held(&mvm->mutex);
381
382 skb = skb_peek(&tid_data->deferred_tx_frames);
383 if (!skb)
384 return;
385 hdr = (void *)skb->data;
386
387 ac = iwl_mvm_tid_to_ac_queue(tid);
388 mac_queue = IEEE80211_SKB_CB(skb)->hw_queue;
389
390 if (tid_data->txq_id == IEEE80211_INVAL_HW_QUEUE &&
391 iwl_mvm_sta_alloc_queue(mvm, sta, ac, tid, hdr)) {
392 IWL_ERR(mvm,
393 "Can't alloc TXQ for sta %d tid %d - dropping frame\n",
394 mvmsta->sta_id, tid);
395
396 /*
397 * Mark queue as problematic so later the deferred traffic is
398 * freed, as we can do nothing with it
399 */
400 no_queue = true;
401 }
402
403 __skb_queue_head_init(&deferred_tx);
404
405 /* Disable bottom-halves when entering TX path */
406 local_bh_disable();
407 spin_lock(&mvmsta->lock);
408 skb_queue_splice_init(&tid_data->deferred_tx_frames, &deferred_tx);
409 spin_unlock(&mvmsta->lock);
410
411 while ((skb = __skb_dequeue(&deferred_tx)))
412 if (no_queue || iwl_mvm_tx_skb(mvm, skb, sta))
413 ieee80211_free_txskb(mvm->hw, skb);
414 local_bh_enable();
415
416 /* Wake queue */
417 iwl_mvm_start_mac_queues(mvm, BIT(mac_queue));
418 }
419
420 void iwl_mvm_add_new_dqa_stream_wk(struct work_struct *wk)
421 {
422 struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm,
423 add_stream_wk);
424 struct ieee80211_sta *sta;
425 struct iwl_mvm_sta *mvmsta;
426 unsigned long deferred_tid_traffic;
427 int sta_id, tid;
428
429 mutex_lock(&mvm->mutex);
430
431 /* Go over all stations with deferred traffic */
432 for_each_set_bit(sta_id, mvm->sta_deferred_frames,
433 IWL_MVM_STATION_COUNT) {
434 clear_bit(sta_id, mvm->sta_deferred_frames);
435 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
436 lockdep_is_held(&mvm->mutex));
437 if (IS_ERR_OR_NULL(sta))
438 continue;
439
440 mvmsta = iwl_mvm_sta_from_mac80211(sta);
441 deferred_tid_traffic = mvmsta->deferred_traffic_tid_map;
442
443 for_each_set_bit(tid, &deferred_tid_traffic,
444 IWL_MAX_TID_COUNT + 1)
445 iwl_mvm_tx_deferred_stream(mvm, sta, tid);
446 }
447
448 mutex_unlock(&mvm->mutex);
449 }
450
451 static int iwl_mvm_reserve_sta_stream(struct iwl_mvm *mvm,
452 struct ieee80211_sta *sta,
453 enum nl80211_iftype vif_type)
454 {
455 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
456 int queue;
457
458 spin_lock_bh(&mvm->queue_info_lock);
459
460 /* Make sure we have free resources for this STA */
461 if (vif_type == NL80211_IFTYPE_STATION && !sta->tdls &&
462 !mvm->queue_info[IWL_MVM_DQA_BSS_CLIENT_QUEUE].hw_queue_refcount &&
463 !mvm->queue_info[IWL_MVM_DQA_BSS_CLIENT_QUEUE].setup_reserved)
464 queue = IWL_MVM_DQA_BSS_CLIENT_QUEUE;
465 else
466 queue = iwl_mvm_find_free_queue(mvm, IWL_MVM_DQA_MIN_DATA_QUEUE,
467 IWL_MVM_DQA_MAX_DATA_QUEUE);
468 if (queue < 0) {
469 spin_unlock_bh(&mvm->queue_info_lock);
470 IWL_ERR(mvm, "No available queues for new station\n");
471 return -ENOSPC;
472 }
473 mvm->queue_info[queue].setup_reserved = true;
474
475 spin_unlock_bh(&mvm->queue_info_lock);
476
477 mvmsta->reserved_queue = queue;
478
479 IWL_DEBUG_TX_QUEUES(mvm, "Reserving data queue #%d for sta_id %d\n",
480 queue, mvmsta->sta_id);
481
482 return 0;
483 }
484
485 int iwl_mvm_add_sta(struct iwl_mvm *mvm,
486 struct ieee80211_vif *vif,
487 struct ieee80211_sta *sta)
488 {
489 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
490 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
491 struct iwl_mvm_rxq_dup_data *dup_data;
492 int i, ret, sta_id;
493
494 lockdep_assert_held(&mvm->mutex);
495
496 if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
497 sta_id = iwl_mvm_find_free_sta_id(mvm,
498 ieee80211_vif_type_p2p(vif));
499 else
500 sta_id = mvm_sta->sta_id;
501
502 if (sta_id == IWL_MVM_STATION_COUNT)
503 return -ENOSPC;
504
505 spin_lock_init(&mvm_sta->lock);
506
507 mvm_sta->sta_id = sta_id;
508 mvm_sta->mac_id_n_color = FW_CMD_ID_AND_COLOR(mvmvif->id,
509 mvmvif->color);
510 mvm_sta->vif = vif;
511 mvm_sta->max_agg_bufsize = LINK_QUAL_AGG_FRAME_LIMIT_DEF;
512 mvm_sta->tx_protection = 0;
513 mvm_sta->tt_tx_protection = false;
514
515 /* HW restart, don't assume the memory has been zeroed */
516 atomic_set(&mvm->pending_frames[sta_id], 0);
517 mvm_sta->tid_disable_agg = 0xffff; /* No aggs at first */
518 mvm_sta->tfd_queue_msk = 0;
519
520 /* allocate new queues for a TDLS station */
521 if (sta->tdls) {
522 ret = iwl_mvm_tdls_sta_init(mvm, sta);
523 if (ret)
524 return ret;
525 } else if (!iwl_mvm_is_dqa_supported(mvm)) {
526 for (i = 0; i < IEEE80211_NUM_ACS; i++)
527 if (vif->hw_queue[i] != IEEE80211_INVAL_HW_QUEUE)
528 mvm_sta->tfd_queue_msk |= BIT(vif->hw_queue[i]);
529 }
530
531 /* for HW restart - reset everything but the sequence number */
532 for (i = 0; i <= IWL_MAX_TID_COUNT; i++) {
533 u16 seq = mvm_sta->tid_data[i].seq_number;
534 memset(&mvm_sta->tid_data[i], 0, sizeof(mvm_sta->tid_data[i]));
535 mvm_sta->tid_data[i].seq_number = seq;
536
537 if (!iwl_mvm_is_dqa_supported(mvm))
538 continue;
539
540 /*
541 * Mark all queues for this STA as unallocated and defer TX
542 * frames until the queue is allocated
543 */
544 mvm_sta->tid_data[i].txq_id = IEEE80211_INVAL_HW_QUEUE;
545 skb_queue_head_init(&mvm_sta->tid_data[i].deferred_tx_frames);
546 }
547 mvm_sta->deferred_traffic_tid_map = 0;
548 mvm_sta->agg_tids = 0;
549
550 if (iwl_mvm_has_new_rx_api(mvm) &&
551 !test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
552 dup_data = kcalloc(mvm->trans->num_rx_queues,
553 sizeof(*dup_data),
554 GFP_KERNEL);
555 if (!dup_data)
556 return -ENOMEM;
557 mvm_sta->dup_data = dup_data;
558 }
559
560 if (iwl_mvm_is_dqa_supported(mvm)) {
561 ret = iwl_mvm_reserve_sta_stream(mvm, sta,
562 ieee80211_vif_type_p2p(vif));
563 if (ret)
564 goto err;
565 }
566
567 ret = iwl_mvm_sta_send_to_fw(mvm, sta, false, 0);
568 if (ret)
569 goto err;
570
571 if (vif->type == NL80211_IFTYPE_STATION) {
572 if (!sta->tdls) {
573 WARN_ON(mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT);
574 mvmvif->ap_sta_id = sta_id;
575 } else {
576 WARN_ON(mvmvif->ap_sta_id == IWL_MVM_STATION_COUNT);
577 }
578 }
579
580 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta_id], sta);
581
582 return 0;
583
584 err:
585 iwl_mvm_tdls_sta_deinit(mvm, sta);
586 return ret;
587 }
588
589 int iwl_mvm_update_sta(struct iwl_mvm *mvm,
590 struct ieee80211_vif *vif,
591 struct ieee80211_sta *sta)
592 {
593 return iwl_mvm_sta_send_to_fw(mvm, sta, true, 0);
594 }
595
596 int iwl_mvm_drain_sta(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta,
597 bool drain)
598 {
599 struct iwl_mvm_add_sta_cmd cmd = {};
600 int ret;
601 u32 status;
602
603 lockdep_assert_held(&mvm->mutex);
604
605 cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color);
606 cmd.sta_id = mvmsta->sta_id;
607 cmd.add_modify = STA_MODE_MODIFY;
608 cmd.station_flags = drain ? cpu_to_le32(STA_FLG_DRAIN_FLOW) : 0;
609 cmd.station_flags_msk = cpu_to_le32(STA_FLG_DRAIN_FLOW);
610
611 status = ADD_STA_SUCCESS;
612 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
613 iwl_mvm_add_sta_cmd_size(mvm),
614 &cmd, &status);
615 if (ret)
616 return ret;
617
618 switch (status & IWL_ADD_STA_STATUS_MASK) {
619 case ADD_STA_SUCCESS:
620 IWL_DEBUG_INFO(mvm, "Frames for staid %d will drained in fw\n",
621 mvmsta->sta_id);
622 break;
623 default:
624 ret = -EIO;
625 IWL_ERR(mvm, "Couldn't drain frames for staid %d\n",
626 mvmsta->sta_id);
627 break;
628 }
629
630 return ret;
631 }
632
633 /*
634 * Remove a station from the FW table. Before sending the command to remove
635 * the station validate that the station is indeed known to the driver (sanity
636 * only).
637 */
638 static int iwl_mvm_rm_sta_common(struct iwl_mvm *mvm, u8 sta_id)
639 {
640 struct ieee80211_sta *sta;
641 struct iwl_mvm_rm_sta_cmd rm_sta_cmd = {
642 .sta_id = sta_id,
643 };
644 int ret;
645
646 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
647 lockdep_is_held(&mvm->mutex));
648
649 /* Note: internal stations are marked as error values */
650 if (!sta) {
651 IWL_ERR(mvm, "Invalid station id\n");
652 return -EINVAL;
653 }
654
655 ret = iwl_mvm_send_cmd_pdu(mvm, REMOVE_STA, 0,
656 sizeof(rm_sta_cmd), &rm_sta_cmd);
657 if (ret) {
658 IWL_ERR(mvm, "Failed to remove station. Id=%d\n", sta_id);
659 return ret;
660 }
661
662 return 0;
663 }
664
665 void iwl_mvm_sta_drained_wk(struct work_struct *wk)
666 {
667 struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm, sta_drained_wk);
668 u8 sta_id;
669
670 /*
671 * The mutex is needed because of the SYNC cmd, but not only: if the
672 * work would run concurrently with iwl_mvm_rm_sta, it would run before
673 * iwl_mvm_rm_sta sets the station as busy, and exit. Then
674 * iwl_mvm_rm_sta would set the station as busy, and nobody will clean
675 * that later.
676 */
677 mutex_lock(&mvm->mutex);
678
679 for_each_set_bit(sta_id, mvm->sta_drained, IWL_MVM_STATION_COUNT) {
680 int ret;
681 struct ieee80211_sta *sta =
682 rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
683 lockdep_is_held(&mvm->mutex));
684
685 /*
686 * This station is in use or RCU-removed; the latter happens in
687 * managed mode, where mac80211 removes the station before we
688 * can remove it from firmware (we can only do that after the
689 * MAC is marked unassociated), and possibly while the deauth
690 * frame to disconnect from the AP is still queued. Then, the
691 * station pointer is -ENOENT when the last skb is reclaimed.
692 */
693 if (!IS_ERR(sta) || PTR_ERR(sta) == -ENOENT)
694 continue;
695
696 if (PTR_ERR(sta) == -EINVAL) {
697 IWL_ERR(mvm, "Drained sta %d, but it is internal?\n",
698 sta_id);
699 continue;
700 }
701
702 if (!sta) {
703 IWL_ERR(mvm, "Drained sta %d, but it was NULL?\n",
704 sta_id);
705 continue;
706 }
707
708 WARN_ON(PTR_ERR(sta) != -EBUSY);
709 /* This station was removed and we waited until it got drained,
710 * we can now proceed and remove it.
711 */
712 ret = iwl_mvm_rm_sta_common(mvm, sta_id);
713 if (ret) {
714 IWL_ERR(mvm,
715 "Couldn't remove sta %d after it was drained\n",
716 sta_id);
717 continue;
718 }
719 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta_id], NULL);
720 clear_bit(sta_id, mvm->sta_drained);
721
722 if (mvm->tfd_drained[sta_id]) {
723 unsigned long i, msk = mvm->tfd_drained[sta_id];
724
725 for_each_set_bit(i, &msk, sizeof(msk) * BITS_PER_BYTE)
726 iwl_mvm_disable_txq(mvm, i, i,
727 IWL_MAX_TID_COUNT, 0);
728
729 mvm->tfd_drained[sta_id] = 0;
730 IWL_DEBUG_TDLS(mvm, "Drained sta %d, with queues %ld\n",
731 sta_id, msk);
732 }
733 }
734
735 mutex_unlock(&mvm->mutex);
736 }
737
738 static void iwl_mvm_disable_sta_queues(struct iwl_mvm *mvm,
739 struct ieee80211_vif *vif,
740 struct iwl_mvm_sta *mvm_sta)
741 {
742 int ac;
743 int i;
744
745 lockdep_assert_held(&mvm->mutex);
746
747 for (i = 0; i < ARRAY_SIZE(mvm_sta->tid_data); i++) {
748 if (mvm_sta->tid_data[i].txq_id == IEEE80211_INVAL_HW_QUEUE)
749 continue;
750
751 ac = iwl_mvm_tid_to_ac_queue(i);
752 iwl_mvm_disable_txq(mvm, mvm_sta->tid_data[i].txq_id,
753 vif->hw_queue[ac], i, 0);
754 mvm_sta->tid_data[i].txq_id = IEEE80211_INVAL_HW_QUEUE;
755 }
756 }
757
758 int iwl_mvm_rm_sta(struct iwl_mvm *mvm,
759 struct ieee80211_vif *vif,
760 struct ieee80211_sta *sta)
761 {
762 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
763 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
764 int ret;
765
766 lockdep_assert_held(&mvm->mutex);
767
768 if (iwl_mvm_has_new_rx_api(mvm))
769 kfree(mvm_sta->dup_data);
770
771 if (vif->type == NL80211_IFTYPE_STATION &&
772 mvmvif->ap_sta_id == mvm_sta->sta_id) {
773 ret = iwl_mvm_drain_sta(mvm, mvm_sta, true);
774 if (ret)
775 return ret;
776 /* flush its queues here since we are freeing mvm_sta */
777 ret = iwl_mvm_flush_tx_path(mvm, mvm_sta->tfd_queue_msk, 0);
778 if (ret)
779 return ret;
780 ret = iwl_trans_wait_tx_queue_empty(mvm->trans,
781 mvm_sta->tfd_queue_msk);
782 if (ret)
783 return ret;
784 ret = iwl_mvm_drain_sta(mvm, mvm_sta, false);
785
786 /* If DQA is supported - the queues can be disabled now */
787 if (iwl_mvm_is_dqa_supported(mvm))
788 iwl_mvm_disable_sta_queues(mvm, vif, mvm_sta);
789
790 /* if we are associated - we can't remove the AP STA now */
791 if (vif->bss_conf.assoc)
792 return ret;
793
794 /* unassoc - go ahead - remove the AP STA now */
795 mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
796
797 /* clear d0i3_ap_sta_id if no longer relevant */
798 if (mvm->d0i3_ap_sta_id == mvm_sta->sta_id)
799 mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
800 }
801
802 /*
803 * This shouldn't happen - the TDLS channel switch should be canceled
804 * before the STA is removed.
805 */
806 if (WARN_ON_ONCE(mvm->tdls_cs.peer.sta_id == mvm_sta->sta_id)) {
807 mvm->tdls_cs.peer.sta_id = IWL_MVM_STATION_COUNT;
808 cancel_delayed_work(&mvm->tdls_cs.dwork);
809 }
810
811 /*
812 * Make sure that the tx response code sees the station as -EBUSY and
813 * calls the drain worker.
814 */
815 spin_lock_bh(&mvm_sta->lock);
816 /*
817 * There are frames pending on the AC queues for this station.
818 * We need to wait until all the frames are drained...
819 */
820 if (atomic_read(&mvm->pending_frames[mvm_sta->sta_id])) {
821 rcu_assign_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id],
822 ERR_PTR(-EBUSY));
823 spin_unlock_bh(&mvm_sta->lock);
824
825 /* disable TDLS sta queues on drain complete */
826 if (sta->tdls) {
827 mvm->tfd_drained[mvm_sta->sta_id] =
828 mvm_sta->tfd_queue_msk;
829 IWL_DEBUG_TDLS(mvm, "Draining TDLS sta %d\n",
830 mvm_sta->sta_id);
831 }
832
833 ret = iwl_mvm_drain_sta(mvm, mvm_sta, true);
834 } else {
835 spin_unlock_bh(&mvm_sta->lock);
836
837 if (sta->tdls)
838 iwl_mvm_tdls_sta_deinit(mvm, sta);
839
840 ret = iwl_mvm_rm_sta_common(mvm, mvm_sta->sta_id);
841 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[mvm_sta->sta_id], NULL);
842 }
843
844 return ret;
845 }
846
847 int iwl_mvm_rm_sta_id(struct iwl_mvm *mvm,
848 struct ieee80211_vif *vif,
849 u8 sta_id)
850 {
851 int ret = iwl_mvm_rm_sta_common(mvm, sta_id);
852
853 lockdep_assert_held(&mvm->mutex);
854
855 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta_id], NULL);
856 return ret;
857 }
858
859 int iwl_mvm_allocate_int_sta(struct iwl_mvm *mvm,
860 struct iwl_mvm_int_sta *sta,
861 u32 qmask, enum nl80211_iftype iftype)
862 {
863 if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
864 sta->sta_id = iwl_mvm_find_free_sta_id(mvm, iftype);
865 if (WARN_ON_ONCE(sta->sta_id == IWL_MVM_STATION_COUNT))
866 return -ENOSPC;
867 }
868
869 sta->tfd_queue_msk = qmask;
870
871 /* put a non-NULL value so iterating over the stations won't stop */
872 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta->sta_id], ERR_PTR(-EINVAL));
873 return 0;
874 }
875
876 static void iwl_mvm_dealloc_int_sta(struct iwl_mvm *mvm,
877 struct iwl_mvm_int_sta *sta)
878 {
879 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta->sta_id], NULL);
880 memset(sta, 0, sizeof(struct iwl_mvm_int_sta));
881 sta->sta_id = IWL_MVM_STATION_COUNT;
882 }
883
884 static int iwl_mvm_add_int_sta_common(struct iwl_mvm *mvm,
885 struct iwl_mvm_int_sta *sta,
886 const u8 *addr,
887 u16 mac_id, u16 color)
888 {
889 struct iwl_mvm_add_sta_cmd cmd;
890 int ret;
891 u32 status;
892
893 lockdep_assert_held(&mvm->mutex);
894
895 memset(&cmd, 0, sizeof(cmd));
896 cmd.sta_id = sta->sta_id;
897 cmd.mac_id_n_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(mac_id,
898 color));
899
900 cmd.tfd_queue_msk = cpu_to_le32(sta->tfd_queue_msk);
901 cmd.tid_disable_tx = cpu_to_le16(0xffff);
902
903 if (addr)
904 memcpy(cmd.addr, addr, ETH_ALEN);
905
906 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
907 iwl_mvm_add_sta_cmd_size(mvm),
908 &cmd, &status);
909 if (ret)
910 return ret;
911
912 switch (status & IWL_ADD_STA_STATUS_MASK) {
913 case ADD_STA_SUCCESS:
914 IWL_DEBUG_INFO(mvm, "Internal station added.\n");
915 return 0;
916 default:
917 ret = -EIO;
918 IWL_ERR(mvm, "Add internal station failed, status=0x%x\n",
919 status);
920 break;
921 }
922 return ret;
923 }
924
925 int iwl_mvm_add_aux_sta(struct iwl_mvm *mvm)
926 {
927 unsigned int wdg_timeout = iwlmvm_mod_params.tfd_q_hang_detect ?
928 mvm->cfg->base_params->wd_timeout :
929 IWL_WATCHDOG_DISABLED;
930 int ret;
931
932 lockdep_assert_held(&mvm->mutex);
933
934 /* Map Aux queue to fifo - needs to happen before adding Aux station */
935 iwl_mvm_enable_ac_txq(mvm, mvm->aux_queue, mvm->aux_queue,
936 IWL_MVM_TX_FIFO_MCAST, 0, wdg_timeout);
937
938 /* Allocate aux station and assign to it the aux queue */
939 ret = iwl_mvm_allocate_int_sta(mvm, &mvm->aux_sta, BIT(mvm->aux_queue),
940 NL80211_IFTYPE_UNSPECIFIED);
941 if (ret)
942 return ret;
943
944 ret = iwl_mvm_add_int_sta_common(mvm, &mvm->aux_sta, NULL,
945 MAC_INDEX_AUX, 0);
946
947 if (ret)
948 iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta);
949 return ret;
950 }
951
952 int iwl_mvm_add_snif_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
953 {
954 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
955
956 lockdep_assert_held(&mvm->mutex);
957 return iwl_mvm_add_int_sta_common(mvm, &mvm->snif_sta, vif->addr,
958 mvmvif->id, 0);
959 }
960
961 int iwl_mvm_rm_snif_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
962 {
963 int ret;
964
965 lockdep_assert_held(&mvm->mutex);
966
967 ret = iwl_mvm_rm_sta_common(mvm, mvm->snif_sta.sta_id);
968 if (ret)
969 IWL_WARN(mvm, "Failed sending remove station\n");
970
971 return ret;
972 }
973
974 void iwl_mvm_dealloc_snif_sta(struct iwl_mvm *mvm)
975 {
976 iwl_mvm_dealloc_int_sta(mvm, &mvm->snif_sta);
977 }
978
979 void iwl_mvm_del_aux_sta(struct iwl_mvm *mvm)
980 {
981 lockdep_assert_held(&mvm->mutex);
982
983 iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta);
984 }
985
986 /*
987 * Send the add station command for the vif's broadcast station.
988 * Assumes that the station was already allocated.
989 *
990 * @mvm: the mvm component
991 * @vif: the interface to which the broadcast station is added
992 * @bsta: the broadcast station to add.
993 */
994 int iwl_mvm_send_add_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
995 {
996 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
997 struct iwl_mvm_int_sta *bsta = &mvmvif->bcast_sta;
998 static const u8 _baddr[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
999 const u8 *baddr = _baddr;
1000
1001 lockdep_assert_held(&mvm->mutex);
1002
1003 if (iwl_mvm_is_dqa_supported(mvm)) {
1004 struct iwl_trans_txq_scd_cfg cfg = {
1005 .fifo = IWL_MVM_TX_FIFO_VO,
1006 .sta_id = mvmvif->bcast_sta.sta_id,
1007 .tid = IWL_MAX_TID_COUNT,
1008 .aggregate = false,
1009 .frame_limit = IWL_FRAME_LIMIT,
1010 };
1011 unsigned int wdg_timeout =
1012 iwl_mvm_get_wd_timeout(mvm, vif, false, false);
1013 int queue;
1014
1015 if ((vif->type == NL80211_IFTYPE_AP) &&
1016 (mvmvif->bcast_sta.tfd_queue_msk &
1017 BIT(IWL_MVM_DQA_AP_PROBE_RESP_QUEUE)))
1018 queue = IWL_MVM_DQA_AP_PROBE_RESP_QUEUE;
1019 else if (WARN(1, "Missed required TXQ for adding bcast STA\n"))
1020 return -EINVAL;
1021
1022 iwl_mvm_enable_txq(mvm, queue, vif->hw_queue[0], 0, &cfg,
1023 wdg_timeout);
1024 }
1025
1026 if (vif->type == NL80211_IFTYPE_ADHOC)
1027 baddr = vif->bss_conf.bssid;
1028
1029 if (WARN_ON_ONCE(bsta->sta_id == IWL_MVM_STATION_COUNT))
1030 return -ENOSPC;
1031
1032 return iwl_mvm_add_int_sta_common(mvm, bsta, baddr,
1033 mvmvif->id, mvmvif->color);
1034 }
1035
1036 /* Send the FW a request to remove the station from it's internal data
1037 * structures, but DO NOT remove the entry from the local data structures. */
1038 int iwl_mvm_send_rm_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1039 {
1040 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1041 int ret;
1042
1043 lockdep_assert_held(&mvm->mutex);
1044
1045 ret = iwl_mvm_rm_sta_common(mvm, mvmvif->bcast_sta.sta_id);
1046 if (ret)
1047 IWL_WARN(mvm, "Failed sending remove station\n");
1048 return ret;
1049 }
1050
1051 int iwl_mvm_alloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1052 {
1053 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1054 u32 qmask = 0;
1055
1056 lockdep_assert_held(&mvm->mutex);
1057
1058 if (!iwl_mvm_is_dqa_supported(mvm))
1059 qmask = iwl_mvm_mac_get_queues_mask(vif);
1060
1061 if (vif->type == NL80211_IFTYPE_AP) {
1062 /*
1063 * The firmware defines the TFD queue mask to only be relevant
1064 * for *unicast* queues, so the multicast (CAB) queue shouldn't
1065 * be included.
1066 */
1067 qmask &= ~BIT(vif->cab_queue);
1068
1069 if (iwl_mvm_is_dqa_supported(mvm))
1070 qmask |= BIT(IWL_MVM_DQA_AP_PROBE_RESP_QUEUE);
1071 }
1072
1073 return iwl_mvm_allocate_int_sta(mvm, &mvmvif->bcast_sta, qmask,
1074 ieee80211_vif_type_p2p(vif));
1075 }
1076
1077 /* Allocate a new station entry for the broadcast station to the given vif,
1078 * and send it to the FW.
1079 * Note that each P2P mac should have its own broadcast station.
1080 *
1081 * @mvm: the mvm component
1082 * @vif: the interface to which the broadcast station is added
1083 * @bsta: the broadcast station to add. */
1084 int iwl_mvm_add_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1085 {
1086 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1087 struct iwl_mvm_int_sta *bsta = &mvmvif->bcast_sta;
1088 int ret;
1089
1090 lockdep_assert_held(&mvm->mutex);
1091
1092 ret = iwl_mvm_alloc_bcast_sta(mvm, vif);
1093 if (ret)
1094 return ret;
1095
1096 ret = iwl_mvm_send_add_bcast_sta(mvm, vif);
1097
1098 if (ret)
1099 iwl_mvm_dealloc_int_sta(mvm, bsta);
1100
1101 return ret;
1102 }
1103
1104 void iwl_mvm_dealloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1105 {
1106 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1107
1108 iwl_mvm_dealloc_int_sta(mvm, &mvmvif->bcast_sta);
1109 }
1110
1111 /*
1112 * Send the FW a request to remove the station from it's internal data
1113 * structures, and in addition remove it from the local data structure.
1114 */
1115 int iwl_mvm_rm_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1116 {
1117 int ret;
1118
1119 lockdep_assert_held(&mvm->mutex);
1120
1121 ret = iwl_mvm_send_rm_bcast_sta(mvm, vif);
1122
1123 iwl_mvm_dealloc_bcast_sta(mvm, vif);
1124
1125 return ret;
1126 }
1127
1128 #define IWL_MAX_RX_BA_SESSIONS 16
1129
1130 int iwl_mvm_sta_rx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
1131 int tid, u16 ssn, bool start, u8 buf_size)
1132 {
1133 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
1134 struct iwl_mvm_add_sta_cmd cmd = {};
1135 int ret;
1136 u32 status;
1137
1138 lockdep_assert_held(&mvm->mutex);
1139
1140 if (start && mvm->rx_ba_sessions >= IWL_MAX_RX_BA_SESSIONS) {
1141 IWL_WARN(mvm, "Not enough RX BA SESSIONS\n");
1142 return -ENOSPC;
1143 }
1144
1145 cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color);
1146 cmd.sta_id = mvm_sta->sta_id;
1147 cmd.add_modify = STA_MODE_MODIFY;
1148 if (start) {
1149 cmd.add_immediate_ba_tid = (u8) tid;
1150 cmd.add_immediate_ba_ssn = cpu_to_le16(ssn);
1151 cmd.rx_ba_window = cpu_to_le16((u16)buf_size);
1152 } else {
1153 cmd.remove_immediate_ba_tid = (u8) tid;
1154 }
1155 cmd.modify_mask = start ? STA_MODIFY_ADD_BA_TID :
1156 STA_MODIFY_REMOVE_BA_TID;
1157
1158 status = ADD_STA_SUCCESS;
1159 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
1160 iwl_mvm_add_sta_cmd_size(mvm),
1161 &cmd, &status);
1162 if (ret)
1163 return ret;
1164
1165 switch (status & IWL_ADD_STA_STATUS_MASK) {
1166 case ADD_STA_SUCCESS:
1167 IWL_DEBUG_INFO(mvm, "RX BA Session %sed in fw\n",
1168 start ? "start" : "stopp");
1169 break;
1170 case ADD_STA_IMMEDIATE_BA_FAILURE:
1171 IWL_WARN(mvm, "RX BA Session refused by fw\n");
1172 ret = -ENOSPC;
1173 break;
1174 default:
1175 ret = -EIO;
1176 IWL_ERR(mvm, "RX BA Session failed %sing, status 0x%x\n",
1177 start ? "start" : "stopp", status);
1178 break;
1179 }
1180
1181 if (!ret) {
1182 if (start)
1183 mvm->rx_ba_sessions++;
1184 else if (mvm->rx_ba_sessions > 0)
1185 /* check that restart flow didn't zero the counter */
1186 mvm->rx_ba_sessions--;
1187 }
1188
1189 return ret;
1190 }
1191
1192 static int iwl_mvm_sta_tx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
1193 int tid, u8 queue, bool start)
1194 {
1195 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
1196 struct iwl_mvm_add_sta_cmd cmd = {};
1197 int ret;
1198 u32 status;
1199
1200 lockdep_assert_held(&mvm->mutex);
1201
1202 if (start) {
1203 mvm_sta->tfd_queue_msk |= BIT(queue);
1204 mvm_sta->tid_disable_agg &= ~BIT(tid);
1205 } else {
1206 mvm_sta->tfd_queue_msk &= ~BIT(queue);
1207 mvm_sta->tid_disable_agg |= BIT(tid);
1208 }
1209
1210 cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color);
1211 cmd.sta_id = mvm_sta->sta_id;
1212 cmd.add_modify = STA_MODE_MODIFY;
1213 cmd.modify_mask = STA_MODIFY_QUEUES | STA_MODIFY_TID_DISABLE_TX;
1214 cmd.tfd_queue_msk = cpu_to_le32(mvm_sta->tfd_queue_msk);
1215 cmd.tid_disable_tx = cpu_to_le16(mvm_sta->tid_disable_agg);
1216
1217 status = ADD_STA_SUCCESS;
1218 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
1219 iwl_mvm_add_sta_cmd_size(mvm),
1220 &cmd, &status);
1221 if (ret)
1222 return ret;
1223
1224 switch (status & IWL_ADD_STA_STATUS_MASK) {
1225 case ADD_STA_SUCCESS:
1226 break;
1227 default:
1228 ret = -EIO;
1229 IWL_ERR(mvm, "TX BA Session failed %sing, status 0x%x\n",
1230 start ? "start" : "stopp", status);
1231 break;
1232 }
1233
1234 return ret;
1235 }
1236
1237 const u8 tid_to_mac80211_ac[] = {
1238 IEEE80211_AC_BE,
1239 IEEE80211_AC_BK,
1240 IEEE80211_AC_BK,
1241 IEEE80211_AC_BE,
1242 IEEE80211_AC_VI,
1243 IEEE80211_AC_VI,
1244 IEEE80211_AC_VO,
1245 IEEE80211_AC_VO,
1246 };
1247
1248 static const u8 tid_to_ucode_ac[] = {
1249 AC_BE,
1250 AC_BK,
1251 AC_BK,
1252 AC_BE,
1253 AC_VI,
1254 AC_VI,
1255 AC_VO,
1256 AC_VO,
1257 };
1258
1259 int iwl_mvm_sta_tx_agg_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1260 struct ieee80211_sta *sta, u16 tid, u16 *ssn)
1261 {
1262 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1263 struct iwl_mvm_tid_data *tid_data;
1264 int txq_id;
1265 int ret;
1266
1267 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
1268 return -EINVAL;
1269
1270 if (mvmsta->tid_data[tid].state != IWL_AGG_OFF) {
1271 IWL_ERR(mvm, "Start AGG when state is not IWL_AGG_OFF %d!\n",
1272 mvmsta->tid_data[tid].state);
1273 return -ENXIO;
1274 }
1275
1276 lockdep_assert_held(&mvm->mutex);
1277
1278 spin_lock_bh(&mvmsta->lock);
1279
1280 /* possible race condition - we entered D0i3 while starting agg */
1281 if (test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status)) {
1282 spin_unlock_bh(&mvmsta->lock);
1283 IWL_ERR(mvm, "Entered D0i3 while starting Tx agg\n");
1284 return -EIO;
1285 }
1286
1287 spin_lock_bh(&mvm->queue_info_lock);
1288
1289 txq_id = iwl_mvm_find_free_queue(mvm, mvm->first_agg_queue,
1290 mvm->last_agg_queue);
1291 if (txq_id < 0) {
1292 ret = txq_id;
1293 spin_unlock_bh(&mvm->queue_info_lock);
1294 IWL_ERR(mvm, "Failed to allocate agg queue\n");
1295 goto release_locks;
1296 }
1297 mvm->queue_info[txq_id].setup_reserved = true;
1298 spin_unlock_bh(&mvm->queue_info_lock);
1299
1300 tid_data = &mvmsta->tid_data[tid];
1301 tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
1302 tid_data->txq_id = txq_id;
1303 *ssn = tid_data->ssn;
1304
1305 IWL_DEBUG_TX_QUEUES(mvm,
1306 "Start AGG: sta %d tid %d queue %d - ssn = %d, next_recl = %d\n",
1307 mvmsta->sta_id, tid, txq_id, tid_data->ssn,
1308 tid_data->next_reclaimed);
1309
1310 if (tid_data->ssn == tid_data->next_reclaimed) {
1311 tid_data->state = IWL_AGG_STARTING;
1312 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1313 } else {
1314 tid_data->state = IWL_EMPTYING_HW_QUEUE_ADDBA;
1315 }
1316
1317 ret = 0;
1318
1319 release_locks:
1320 spin_unlock_bh(&mvmsta->lock);
1321
1322 return ret;
1323 }
1324
1325 int iwl_mvm_sta_tx_agg_oper(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1326 struct ieee80211_sta *sta, u16 tid, u8 buf_size,
1327 bool amsdu)
1328 {
1329 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1330 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
1331 unsigned int wdg_timeout =
1332 iwl_mvm_get_wd_timeout(mvm, vif, sta->tdls, false);
1333 int queue, ret;
1334 u16 ssn;
1335
1336 struct iwl_trans_txq_scd_cfg cfg = {
1337 .sta_id = mvmsta->sta_id,
1338 .tid = tid,
1339 .frame_limit = buf_size,
1340 .aggregate = true,
1341 };
1342
1343 BUILD_BUG_ON((sizeof(mvmsta->agg_tids) * BITS_PER_BYTE)
1344 != IWL_MAX_TID_COUNT);
1345
1346 buf_size = min_t(int, buf_size, LINK_QUAL_AGG_FRAME_LIMIT_DEF);
1347
1348 spin_lock_bh(&mvmsta->lock);
1349 ssn = tid_data->ssn;
1350 queue = tid_data->txq_id;
1351 tid_data->state = IWL_AGG_ON;
1352 mvmsta->agg_tids |= BIT(tid);
1353 tid_data->ssn = 0xffff;
1354 tid_data->amsdu_in_ampdu_allowed = amsdu;
1355 spin_unlock_bh(&mvmsta->lock);
1356
1357 cfg.fifo = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]];
1358
1359 iwl_mvm_enable_txq(mvm, queue, vif->hw_queue[tid_to_mac80211_ac[tid]],
1360 ssn, &cfg, wdg_timeout);
1361
1362 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true);
1363 if (ret)
1364 return -EIO;
1365
1366 /* No need to mark as reserved */
1367 spin_lock_bh(&mvm->queue_info_lock);
1368 mvm->queue_info[queue].setup_reserved = false;
1369 spin_unlock_bh(&mvm->queue_info_lock);
1370
1371 /*
1372 * Even though in theory the peer could have different
1373 * aggregation reorder buffer sizes for different sessions,
1374 * our ucode doesn't allow for that and has a global limit
1375 * for each station. Therefore, use the minimum of all the
1376 * aggregation sessions and our default value.
1377 */
1378 mvmsta->max_agg_bufsize =
1379 min(mvmsta->max_agg_bufsize, buf_size);
1380 mvmsta->lq_sta.lq.agg_frame_cnt_limit = mvmsta->max_agg_bufsize;
1381
1382 IWL_DEBUG_HT(mvm, "Tx aggregation enabled on ra = %pM tid = %d\n",
1383 sta->addr, tid);
1384
1385 return iwl_mvm_send_lq_cmd(mvm, &mvmsta->lq_sta.lq, false);
1386 }
1387
1388 int iwl_mvm_sta_tx_agg_stop(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1389 struct ieee80211_sta *sta, u16 tid)
1390 {
1391 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1392 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
1393 u16 txq_id;
1394 int err;
1395
1396
1397 /*
1398 * If mac80211 is cleaning its state, then say that we finished since
1399 * our state has been cleared anyway.
1400 */
1401 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
1402 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1403 return 0;
1404 }
1405
1406 spin_lock_bh(&mvmsta->lock);
1407
1408 txq_id = tid_data->txq_id;
1409
1410 IWL_DEBUG_TX_QUEUES(mvm, "Stop AGG: sta %d tid %d q %d state %d\n",
1411 mvmsta->sta_id, tid, txq_id, tid_data->state);
1412
1413 mvmsta->agg_tids &= ~BIT(tid);
1414
1415 /* No need to mark as reserved anymore */
1416 spin_lock_bh(&mvm->queue_info_lock);
1417 mvm->queue_info[txq_id].setup_reserved = false;
1418 spin_unlock_bh(&mvm->queue_info_lock);
1419
1420 switch (tid_data->state) {
1421 case IWL_AGG_ON:
1422 tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
1423
1424 IWL_DEBUG_TX_QUEUES(mvm,
1425 "ssn = %d, next_recl = %d\n",
1426 tid_data->ssn, tid_data->next_reclaimed);
1427
1428 /* There are still packets for this RA / TID in the HW */
1429 if (tid_data->ssn != tid_data->next_reclaimed) {
1430 tid_data->state = IWL_EMPTYING_HW_QUEUE_DELBA;
1431 err = 0;
1432 break;
1433 }
1434
1435 tid_data->ssn = 0xffff;
1436 tid_data->state = IWL_AGG_OFF;
1437 spin_unlock_bh(&mvmsta->lock);
1438
1439 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1440
1441 iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false);
1442
1443 iwl_mvm_disable_txq(mvm, txq_id,
1444 vif->hw_queue[tid_to_mac80211_ac[tid]], tid,
1445 0);
1446 return 0;
1447 case IWL_AGG_STARTING:
1448 case IWL_EMPTYING_HW_QUEUE_ADDBA:
1449 /*
1450 * The agg session has been stopped before it was set up. This
1451 * can happen when the AddBA timer times out for example.
1452 */
1453
1454 /* No barriers since we are under mutex */
1455 lockdep_assert_held(&mvm->mutex);
1456
1457 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1458 tid_data->state = IWL_AGG_OFF;
1459 err = 0;
1460 break;
1461 default:
1462 IWL_ERR(mvm,
1463 "Stopping AGG while state not ON or starting for %d on %d (%d)\n",
1464 mvmsta->sta_id, tid, tid_data->state);
1465 IWL_ERR(mvm,
1466 "\ttid_data->txq_id = %d\n", tid_data->txq_id);
1467 err = -EINVAL;
1468 }
1469
1470 spin_unlock_bh(&mvmsta->lock);
1471
1472 return err;
1473 }
1474
1475 int iwl_mvm_sta_tx_agg_flush(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1476 struct ieee80211_sta *sta, u16 tid)
1477 {
1478 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1479 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
1480 u16 txq_id;
1481 enum iwl_mvm_agg_state old_state;
1482
1483 /*
1484 * First set the agg state to OFF to avoid calling
1485 * ieee80211_stop_tx_ba_cb in iwl_mvm_check_ratid_empty.
1486 */
1487 spin_lock_bh(&mvmsta->lock);
1488 txq_id = tid_data->txq_id;
1489 IWL_DEBUG_TX_QUEUES(mvm, "Flush AGG: sta %d tid %d q %d state %d\n",
1490 mvmsta->sta_id, tid, txq_id, tid_data->state);
1491 old_state = tid_data->state;
1492 tid_data->state = IWL_AGG_OFF;
1493 mvmsta->agg_tids &= ~BIT(tid);
1494 spin_unlock_bh(&mvmsta->lock);
1495
1496 /* No need to mark as reserved */
1497 spin_lock_bh(&mvm->queue_info_lock);
1498 mvm->queue_info[txq_id].setup_reserved = false;
1499 spin_unlock_bh(&mvm->queue_info_lock);
1500
1501 if (old_state >= IWL_AGG_ON) {
1502 iwl_mvm_drain_sta(mvm, mvmsta, true);
1503 if (iwl_mvm_flush_tx_path(mvm, BIT(txq_id), 0))
1504 IWL_ERR(mvm, "Couldn't flush the AGG queue\n");
1505 iwl_trans_wait_tx_queue_empty(mvm->trans,
1506 mvmsta->tfd_queue_msk);
1507 iwl_mvm_drain_sta(mvm, mvmsta, false);
1508
1509 iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false);
1510
1511 iwl_mvm_disable_txq(mvm, tid_data->txq_id,
1512 vif->hw_queue[tid_to_mac80211_ac[tid]], tid,
1513 0);
1514 }
1515
1516 return 0;
1517 }
1518
1519 static int iwl_mvm_set_fw_key_idx(struct iwl_mvm *mvm)
1520 {
1521 int i, max = -1, max_offs = -1;
1522
1523 lockdep_assert_held(&mvm->mutex);
1524
1525 /* Pick the unused key offset with the highest 'deleted'
1526 * counter. Every time a key is deleted, all the counters
1527 * are incremented and the one that was just deleted is
1528 * reset to zero. Thus, the highest counter is the one
1529 * that was deleted longest ago. Pick that one.
1530 */
1531 for (i = 0; i < STA_KEY_MAX_NUM; i++) {
1532 if (test_bit(i, mvm->fw_key_table))
1533 continue;
1534 if (mvm->fw_key_deleted[i] > max) {
1535 max = mvm->fw_key_deleted[i];
1536 max_offs = i;
1537 }
1538 }
1539
1540 if (max_offs < 0)
1541 return STA_KEY_IDX_INVALID;
1542
1543 return max_offs;
1544 }
1545
1546 static struct iwl_mvm_sta *iwl_mvm_get_key_sta(struct iwl_mvm *mvm,
1547 struct ieee80211_vif *vif,
1548 struct ieee80211_sta *sta)
1549 {
1550 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1551
1552 if (sta)
1553 return iwl_mvm_sta_from_mac80211(sta);
1554
1555 /*
1556 * The device expects GTKs for station interfaces to be
1557 * installed as GTKs for the AP station. If we have no
1558 * station ID, then use AP's station ID.
1559 */
1560 if (vif->type == NL80211_IFTYPE_STATION &&
1561 mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT) {
1562 u8 sta_id = mvmvif->ap_sta_id;
1563
1564 sta = rcu_dereference_check(mvm->fw_id_to_mac_id[sta_id],
1565 lockdep_is_held(&mvm->mutex));
1566 /*
1567 * It is possible that the 'sta' parameter is NULL,
1568 * for example when a GTK is removed - the sta_id will then
1569 * be the AP ID, and no station was passed by mac80211.
1570 */
1571 if (IS_ERR_OR_NULL(sta))
1572 return NULL;
1573
1574 return iwl_mvm_sta_from_mac80211(sta);
1575 }
1576
1577 return NULL;
1578 }
1579
1580 static int iwl_mvm_send_sta_key(struct iwl_mvm *mvm,
1581 struct iwl_mvm_sta *mvm_sta,
1582 struct ieee80211_key_conf *keyconf, bool mcast,
1583 u32 tkip_iv32, u16 *tkip_p1k, u32 cmd_flags,
1584 u8 key_offset)
1585 {
1586 struct iwl_mvm_add_sta_key_cmd cmd = {};
1587 __le16 key_flags;
1588 int ret;
1589 u32 status;
1590 u16 keyidx;
1591 int i;
1592 u8 sta_id = mvm_sta->sta_id;
1593
1594 keyidx = (keyconf->keyidx << STA_KEY_FLG_KEYID_POS) &
1595 STA_KEY_FLG_KEYID_MSK;
1596 key_flags = cpu_to_le16(keyidx);
1597 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_KEY_MAP);
1598
1599 switch (keyconf->cipher) {
1600 case WLAN_CIPHER_SUITE_TKIP:
1601 key_flags |= cpu_to_le16(STA_KEY_FLG_TKIP);
1602 cmd.tkip_rx_tsc_byte2 = tkip_iv32;
1603 for (i = 0; i < 5; i++)
1604 cmd.tkip_rx_ttak[i] = cpu_to_le16(tkip_p1k[i]);
1605 memcpy(cmd.key, keyconf->key, keyconf->keylen);
1606 break;
1607 case WLAN_CIPHER_SUITE_CCMP:
1608 key_flags |= cpu_to_le16(STA_KEY_FLG_CCM);
1609 memcpy(cmd.key, keyconf->key, keyconf->keylen);
1610 break;
1611 case WLAN_CIPHER_SUITE_WEP104:
1612 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_13BYTES);
1613 /* fall through */
1614 case WLAN_CIPHER_SUITE_WEP40:
1615 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP);
1616 memcpy(cmd.key + 3, keyconf->key, keyconf->keylen);
1617 break;
1618 default:
1619 key_flags |= cpu_to_le16(STA_KEY_FLG_EXT);
1620 memcpy(cmd.key, keyconf->key, keyconf->keylen);
1621 }
1622
1623 if (mcast)
1624 key_flags |= cpu_to_le16(STA_KEY_MULTICAST);
1625
1626 cmd.key_offset = key_offset;
1627 cmd.key_flags = key_flags;
1628 cmd.sta_id = sta_id;
1629
1630 status = ADD_STA_SUCCESS;
1631 if (cmd_flags & CMD_ASYNC)
1632 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA_KEY, CMD_ASYNC,
1633 sizeof(cmd), &cmd);
1634 else
1635 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, sizeof(cmd),
1636 &cmd, &status);
1637
1638 switch (status) {
1639 case ADD_STA_SUCCESS:
1640 IWL_DEBUG_WEP(mvm, "MODIFY_STA: set dynamic key passed\n");
1641 break;
1642 default:
1643 ret = -EIO;
1644 IWL_ERR(mvm, "MODIFY_STA: set dynamic key failed\n");
1645 break;
1646 }
1647
1648 return ret;
1649 }
1650
1651 static int iwl_mvm_send_sta_igtk(struct iwl_mvm *mvm,
1652 struct ieee80211_key_conf *keyconf,
1653 u8 sta_id, bool remove_key)
1654 {
1655 struct iwl_mvm_mgmt_mcast_key_cmd igtk_cmd = {};
1656
1657 /* verify the key details match the required command's expectations */
1658 if (WARN_ON((keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC) ||
1659 (keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE) ||
1660 (keyconf->keyidx != 4 && keyconf->keyidx != 5)))
1661 return -EINVAL;
1662
1663 igtk_cmd.key_id = cpu_to_le32(keyconf->keyidx);
1664 igtk_cmd.sta_id = cpu_to_le32(sta_id);
1665
1666 if (remove_key) {
1667 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_NOT_VALID);
1668 } else {
1669 struct ieee80211_key_seq seq;
1670 const u8 *pn;
1671
1672 memcpy(igtk_cmd.IGTK, keyconf->key, keyconf->keylen);
1673 ieee80211_get_key_rx_seq(keyconf, 0, &seq);
1674 pn = seq.aes_cmac.pn;
1675 igtk_cmd.receive_seq_cnt = cpu_to_le64(((u64) pn[5] << 0) |
1676 ((u64) pn[4] << 8) |
1677 ((u64) pn[3] << 16) |
1678 ((u64) pn[2] << 24) |
1679 ((u64) pn[1] << 32) |
1680 ((u64) pn[0] << 40));
1681 }
1682
1683 IWL_DEBUG_INFO(mvm, "%s igtk for sta %u\n",
1684 remove_key ? "removing" : "installing",
1685 igtk_cmd.sta_id);
1686
1687 return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, 0,
1688 sizeof(igtk_cmd), &igtk_cmd);
1689 }
1690
1691
1692 static inline u8 *iwl_mvm_get_mac_addr(struct iwl_mvm *mvm,
1693 struct ieee80211_vif *vif,
1694 struct ieee80211_sta *sta)
1695 {
1696 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1697
1698 if (sta)
1699 return sta->addr;
1700
1701 if (vif->type == NL80211_IFTYPE_STATION &&
1702 mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT) {
1703 u8 sta_id = mvmvif->ap_sta_id;
1704 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
1705 lockdep_is_held(&mvm->mutex));
1706 return sta->addr;
1707 }
1708
1709
1710 return NULL;
1711 }
1712
1713 static int __iwl_mvm_set_sta_key(struct iwl_mvm *mvm,
1714 struct ieee80211_vif *vif,
1715 struct ieee80211_sta *sta,
1716 struct ieee80211_key_conf *keyconf,
1717 u8 key_offset,
1718 bool mcast)
1719 {
1720 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
1721 int ret;
1722 const u8 *addr;
1723 struct ieee80211_key_seq seq;
1724 u16 p1k[5];
1725
1726 switch (keyconf->cipher) {
1727 case WLAN_CIPHER_SUITE_TKIP:
1728 addr = iwl_mvm_get_mac_addr(mvm, vif, sta);
1729 /* get phase 1 key from mac80211 */
1730 ieee80211_get_key_rx_seq(keyconf, 0, &seq);
1731 ieee80211_get_tkip_rx_p1k(keyconf, addr, seq.tkip.iv32, p1k);
1732 ret = iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, mcast,
1733 seq.tkip.iv32, p1k, 0, key_offset);
1734 break;
1735 case WLAN_CIPHER_SUITE_CCMP:
1736 case WLAN_CIPHER_SUITE_WEP40:
1737 case WLAN_CIPHER_SUITE_WEP104:
1738 ret = iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, mcast,
1739 0, NULL, 0, key_offset);
1740 break;
1741 default:
1742 ret = iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, mcast,
1743 0, NULL, 0, key_offset);
1744 }
1745
1746 return ret;
1747 }
1748
1749 static int __iwl_mvm_remove_sta_key(struct iwl_mvm *mvm, u8 sta_id,
1750 struct ieee80211_key_conf *keyconf,
1751 bool mcast)
1752 {
1753 struct iwl_mvm_add_sta_key_cmd cmd = {};
1754 __le16 key_flags;
1755 int ret;
1756 u32 status;
1757
1758 key_flags = cpu_to_le16((keyconf->keyidx << STA_KEY_FLG_KEYID_POS) &
1759 STA_KEY_FLG_KEYID_MSK);
1760 key_flags |= cpu_to_le16(STA_KEY_FLG_NO_ENC | STA_KEY_FLG_WEP_KEY_MAP);
1761 key_flags |= cpu_to_le16(STA_KEY_NOT_VALID);
1762
1763 if (mcast)
1764 key_flags |= cpu_to_le16(STA_KEY_MULTICAST);
1765
1766 cmd.key_flags = key_flags;
1767 cmd.key_offset = keyconf->hw_key_idx;
1768 cmd.sta_id = sta_id;
1769
1770 status = ADD_STA_SUCCESS;
1771 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, sizeof(cmd),
1772 &cmd, &status);
1773
1774 switch (status) {
1775 case ADD_STA_SUCCESS:
1776 IWL_DEBUG_WEP(mvm, "MODIFY_STA: remove sta key passed\n");
1777 break;
1778 default:
1779 ret = -EIO;
1780 IWL_ERR(mvm, "MODIFY_STA: remove sta key failed\n");
1781 break;
1782 }
1783
1784 return ret;
1785 }
1786
1787 int iwl_mvm_set_sta_key(struct iwl_mvm *mvm,
1788 struct ieee80211_vif *vif,
1789 struct ieee80211_sta *sta,
1790 struct ieee80211_key_conf *keyconf,
1791 u8 key_offset)
1792 {
1793 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
1794 struct iwl_mvm_sta *mvm_sta;
1795 u8 sta_id;
1796 int ret;
1797 static const u8 __maybe_unused zero_addr[ETH_ALEN] = {0};
1798
1799 lockdep_assert_held(&mvm->mutex);
1800
1801 /* Get the station id from the mvm local station table */
1802 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta);
1803 if (!mvm_sta) {
1804 IWL_ERR(mvm, "Failed to find station\n");
1805 return -EINVAL;
1806 }
1807 sta_id = mvm_sta->sta_id;
1808
1809 if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC) {
1810 ret = iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, false);
1811 goto end;
1812 }
1813
1814 /*
1815 * It is possible that the 'sta' parameter is NULL, and thus
1816 * there is a need to retrieve the sta from the local station table.
1817 */
1818 if (!sta) {
1819 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
1820 lockdep_is_held(&mvm->mutex));
1821 if (IS_ERR_OR_NULL(sta)) {
1822 IWL_ERR(mvm, "Invalid station id\n");
1823 return -EINVAL;
1824 }
1825 }
1826
1827 if (WARN_ON_ONCE(iwl_mvm_sta_from_mac80211(sta)->vif != vif))
1828 return -EINVAL;
1829
1830 /* If the key_offset is not pre-assigned, we need to find a
1831 * new offset to use. In normal cases, the offset is not
1832 * pre-assigned, but during HW_RESTART we want to reuse the
1833 * same indices, so we pass them when this function is called.
1834 *
1835 * In D3 entry, we need to hardcoded the indices (because the
1836 * firmware hardcodes the PTK offset to 0). In this case, we
1837 * need to make sure we don't overwrite the hw_key_idx in the
1838 * keyconf structure, because otherwise we cannot configure
1839 * the original ones back when resuming.
1840 */
1841 if (key_offset == STA_KEY_IDX_INVALID) {
1842 key_offset = iwl_mvm_set_fw_key_idx(mvm);
1843 if (key_offset == STA_KEY_IDX_INVALID)
1844 return -ENOSPC;
1845 keyconf->hw_key_idx = key_offset;
1846 }
1847
1848 ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf, key_offset, mcast);
1849 if (ret)
1850 goto end;
1851
1852 /*
1853 * For WEP, the same key is used for multicast and unicast. Upload it
1854 * again, using the same key offset, and now pointing the other one
1855 * to the same key slot (offset).
1856 * If this fails, remove the original as well.
1857 */
1858 if (keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 ||
1859 keyconf->cipher == WLAN_CIPHER_SUITE_WEP104) {
1860 ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf,
1861 key_offset, !mcast);
1862 if (ret) {
1863 __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast);
1864 goto end;
1865 }
1866 }
1867
1868 __set_bit(key_offset, mvm->fw_key_table);
1869
1870 end:
1871 IWL_DEBUG_WEP(mvm, "key: cipher=%x len=%d idx=%d sta=%pM ret=%d\n",
1872 keyconf->cipher, keyconf->keylen, keyconf->keyidx,
1873 sta ? sta->addr : zero_addr, ret);
1874 return ret;
1875 }
1876
1877 int iwl_mvm_remove_sta_key(struct iwl_mvm *mvm,
1878 struct ieee80211_vif *vif,
1879 struct ieee80211_sta *sta,
1880 struct ieee80211_key_conf *keyconf)
1881 {
1882 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
1883 struct iwl_mvm_sta *mvm_sta;
1884 u8 sta_id = IWL_MVM_STATION_COUNT;
1885 int ret, i;
1886
1887 lockdep_assert_held(&mvm->mutex);
1888
1889 /* Get the station from the mvm local station table */
1890 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta);
1891
1892 IWL_DEBUG_WEP(mvm, "mvm remove dynamic key: idx=%d sta=%d\n",
1893 keyconf->keyidx, sta_id);
1894
1895 if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC)
1896 return iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, true);
1897
1898 if (!__test_and_clear_bit(keyconf->hw_key_idx, mvm->fw_key_table)) {
1899 IWL_ERR(mvm, "offset %d not used in fw key table.\n",
1900 keyconf->hw_key_idx);
1901 return -ENOENT;
1902 }
1903
1904 /* track which key was deleted last */
1905 for (i = 0; i < STA_KEY_MAX_NUM; i++) {
1906 if (mvm->fw_key_deleted[i] < U8_MAX)
1907 mvm->fw_key_deleted[i]++;
1908 }
1909 mvm->fw_key_deleted[keyconf->hw_key_idx] = 0;
1910
1911 if (!mvm_sta) {
1912 IWL_DEBUG_WEP(mvm, "station non-existent, early return.\n");
1913 return 0;
1914 }
1915
1916 sta_id = mvm_sta->sta_id;
1917
1918 ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast);
1919 if (ret)
1920 return ret;
1921
1922 /* delete WEP key twice to get rid of (now useless) offset */
1923 if (keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 ||
1924 keyconf->cipher == WLAN_CIPHER_SUITE_WEP104)
1925 ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, !mcast);
1926
1927 return ret;
1928 }
1929
1930 void iwl_mvm_update_tkip_key(struct iwl_mvm *mvm,
1931 struct ieee80211_vif *vif,
1932 struct ieee80211_key_conf *keyconf,
1933 struct ieee80211_sta *sta, u32 iv32,
1934 u16 *phase1key)
1935 {
1936 struct iwl_mvm_sta *mvm_sta;
1937 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
1938
1939 rcu_read_lock();
1940
1941 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta);
1942 if (WARN_ON_ONCE(!mvm_sta))
1943 goto unlock;
1944 iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, mcast,
1945 iv32, phase1key, CMD_ASYNC, keyconf->hw_key_idx);
1946
1947 unlock:
1948 rcu_read_unlock();
1949 }
1950
1951 void iwl_mvm_sta_modify_ps_wake(struct iwl_mvm *mvm,
1952 struct ieee80211_sta *sta)
1953 {
1954 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1955 struct iwl_mvm_add_sta_cmd cmd = {
1956 .add_modify = STA_MODE_MODIFY,
1957 .sta_id = mvmsta->sta_id,
1958 .station_flags_msk = cpu_to_le32(STA_FLG_PS),
1959 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
1960 };
1961 int ret;
1962
1963 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC,
1964 iwl_mvm_add_sta_cmd_size(mvm), &cmd);
1965 if (ret)
1966 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
1967 }
1968
1969 void iwl_mvm_sta_modify_sleep_tx_count(struct iwl_mvm *mvm,
1970 struct ieee80211_sta *sta,
1971 enum ieee80211_frame_release_type reason,
1972 u16 cnt, u16 tids, bool more_data,
1973 bool agg)
1974 {
1975 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1976 struct iwl_mvm_add_sta_cmd cmd = {
1977 .add_modify = STA_MODE_MODIFY,
1978 .sta_id = mvmsta->sta_id,
1979 .modify_mask = STA_MODIFY_SLEEPING_STA_TX_COUNT,
1980 .sleep_tx_count = cpu_to_le16(cnt),
1981 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
1982 };
1983 int tid, ret;
1984 unsigned long _tids = tids;
1985
1986 /* convert TIDs to ACs - we don't support TSPEC so that's OK
1987 * Note that this field is reserved and unused by firmware not
1988 * supporting GO uAPSD, so it's safe to always do this.
1989 */
1990 for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT)
1991 cmd.awake_acs |= BIT(tid_to_ucode_ac[tid]);
1992
1993 /* If we're releasing frames from aggregation queues then check if the
1994 * all queues combined that we're releasing frames from have
1995 * - more frames than the service period, in which case more_data
1996 * needs to be set
1997 * - fewer than 'cnt' frames, in which case we need to adjust the
1998 * firmware command (but do that unconditionally)
1999 */
2000 if (agg) {
2001 int remaining = cnt;
2002 int sleep_tx_count;
2003
2004 spin_lock_bh(&mvmsta->lock);
2005 for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT) {
2006 struct iwl_mvm_tid_data *tid_data;
2007 u16 n_queued;
2008
2009 tid_data = &mvmsta->tid_data[tid];
2010 if (WARN(tid_data->state != IWL_AGG_ON &&
2011 tid_data->state != IWL_EMPTYING_HW_QUEUE_DELBA,
2012 "TID %d state is %d\n",
2013 tid, tid_data->state)) {
2014 spin_unlock_bh(&mvmsta->lock);
2015 ieee80211_sta_eosp(sta);
2016 return;
2017 }
2018
2019 n_queued = iwl_mvm_tid_queued(tid_data);
2020 if (n_queued > remaining) {
2021 more_data = true;
2022 remaining = 0;
2023 break;
2024 }
2025 remaining -= n_queued;
2026 }
2027 sleep_tx_count = cnt - remaining;
2028 if (reason == IEEE80211_FRAME_RELEASE_UAPSD)
2029 mvmsta->sleep_tx_count = sleep_tx_count;
2030 spin_unlock_bh(&mvmsta->lock);
2031
2032 cmd.sleep_tx_count = cpu_to_le16(sleep_tx_count);
2033 if (WARN_ON(cnt - remaining == 0)) {
2034 ieee80211_sta_eosp(sta);
2035 return;
2036 }
2037 }
2038
2039 /* Note: this is ignored by firmware not supporting GO uAPSD */
2040 if (more_data)
2041 cmd.sleep_state_flags |= cpu_to_le16(STA_SLEEP_STATE_MOREDATA);
2042
2043 if (reason == IEEE80211_FRAME_RELEASE_PSPOLL) {
2044 mvmsta->next_status_eosp = true;
2045 cmd.sleep_state_flags |= cpu_to_le16(STA_SLEEP_STATE_PS_POLL);
2046 } else {
2047 cmd.sleep_state_flags |= cpu_to_le16(STA_SLEEP_STATE_UAPSD);
2048 }
2049
2050 /* block the Tx queues until the FW updated the sleep Tx count */
2051 iwl_trans_block_txq_ptrs(mvm->trans, true);
2052
2053 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA,
2054 CMD_ASYNC | CMD_WANT_ASYNC_CALLBACK,
2055 iwl_mvm_add_sta_cmd_size(mvm), &cmd);
2056 if (ret)
2057 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
2058 }
2059
2060 void iwl_mvm_rx_eosp_notif(struct iwl_mvm *mvm,
2061 struct iwl_rx_cmd_buffer *rxb)
2062 {
2063 struct iwl_rx_packet *pkt = rxb_addr(rxb);
2064 struct iwl_mvm_eosp_notification *notif = (void *)pkt->data;
2065 struct ieee80211_sta *sta;
2066 u32 sta_id = le32_to_cpu(notif->sta_id);
2067
2068 if (WARN_ON_ONCE(sta_id >= IWL_MVM_STATION_COUNT))
2069 return;
2070
2071 rcu_read_lock();
2072 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
2073 if (!IS_ERR_OR_NULL(sta))
2074 ieee80211_sta_eosp(sta);
2075 rcu_read_unlock();
2076 }
2077
2078 void iwl_mvm_sta_modify_disable_tx(struct iwl_mvm *mvm,
2079 struct iwl_mvm_sta *mvmsta, bool disable)
2080 {
2081 struct iwl_mvm_add_sta_cmd cmd = {
2082 .add_modify = STA_MODE_MODIFY,
2083 .sta_id = mvmsta->sta_id,
2084 .station_flags = disable ? cpu_to_le32(STA_FLG_DISABLE_TX) : 0,
2085 .station_flags_msk = cpu_to_le32(STA_FLG_DISABLE_TX),
2086 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
2087 };
2088 int ret;
2089
2090 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC,
2091 iwl_mvm_add_sta_cmd_size(mvm), &cmd);
2092 if (ret)
2093 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
2094 }
2095
2096 void iwl_mvm_sta_modify_disable_tx_ap(struct iwl_mvm *mvm,
2097 struct ieee80211_sta *sta,
2098 bool disable)
2099 {
2100 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
2101
2102 spin_lock_bh(&mvm_sta->lock);
2103
2104 if (mvm_sta->disable_tx == disable) {
2105 spin_unlock_bh(&mvm_sta->lock);
2106 return;
2107 }
2108
2109 mvm_sta->disable_tx = disable;
2110
2111 /*
2112 * Tell mac80211 to start/stop queuing tx for this station,
2113 * but don't stop queuing if there are still pending frames
2114 * for this station.
2115 */
2116 if (disable || !atomic_read(&mvm->pending_frames[mvm_sta->sta_id]))
2117 ieee80211_sta_block_awake(mvm->hw, sta, disable);
2118
2119 iwl_mvm_sta_modify_disable_tx(mvm, mvm_sta, disable);
2120
2121 spin_unlock_bh(&mvm_sta->lock);
2122 }
2123
2124 void iwl_mvm_modify_all_sta_disable_tx(struct iwl_mvm *mvm,
2125 struct iwl_mvm_vif *mvmvif,
2126 bool disable)
2127 {
2128 struct ieee80211_sta *sta;
2129 struct iwl_mvm_sta *mvm_sta;
2130 int i;
2131
2132 lockdep_assert_held(&mvm->mutex);
2133
2134 /* Block/unblock all the stations of the given mvmvif */
2135 for (i = 0; i < IWL_MVM_STATION_COUNT; i++) {
2136 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[i],
2137 lockdep_is_held(&mvm->mutex));
2138 if (IS_ERR_OR_NULL(sta))
2139 continue;
2140
2141 mvm_sta = iwl_mvm_sta_from_mac80211(sta);
2142 if (mvm_sta->mac_id_n_color !=
2143 FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color))
2144 continue;
2145
2146 iwl_mvm_sta_modify_disable_tx_ap(mvm, sta, disable);
2147 }
2148 }
2149
2150 void iwl_mvm_csa_client_absent(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2151 {
2152 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2153 struct iwl_mvm_sta *mvmsta;
2154
2155 rcu_read_lock();
2156
2157 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, mvmvif->ap_sta_id);
2158
2159 if (!WARN_ON(!mvmsta))
2160 iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, true);
2161
2162 rcu_read_unlock();
2163 }
Linux kernel - Deliverables
This page took 0.085891 seconds and 4 git commands to generate.