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iwlwifi: mvm: clean up broadcast station handling
[mirror_ubuntu-eoan-kernel.git] / drivers / net / wireless / iwlwifi / mvm / sta.c
1 /******************************************************************************
2 *
3 * This file is provided under a dual BSD/GPLv2 license. When using or
4 * redistributing this file, you may do so under either license.
5 *
6 * GPL LICENSE SUMMARY
7 *
8 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
9 * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of version 2 of the GNU General Public License as
13 * published by the Free Software Foundation.
14 *
15 * This program is distributed in the hope that it will be useful, but
16 * WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
23 * USA
24 *
25 * The full GNU General Public License is included in this distribution
26 * in the file called COPYING.
27 *
28 * Contact Information:
29 * Intel Linux Wireless <ilw@linux.intel.com>
30 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
31 *
32 * BSD LICENSE
33 *
34 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
35 * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
36 * All rights reserved.
37 *
38 * Redistribution and use in source and binary forms, with or without
39 * modification, are permitted provided that the following conditions
40 * are met:
41 *
42 * * Redistributions of source code must retain the above copyright
43 * notice, this list of conditions and the following disclaimer.
44 * * Redistributions in binary form must reproduce the above copyright
45 * notice, this list of conditions and the following disclaimer in
46 * the documentation and/or other materials provided with the
47 * distribution.
48 * * Neither the name Intel Corporation nor the names of its
49 * contributors may be used to endorse or promote products derived
50 * from this software without specific prior written permission.
51 *
52 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
53 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
54 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
55 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
56 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
57 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
58 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
59 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
60 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
61 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
62 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
63 *
64 *****************************************************************************/
65 #include <net/mac80211.h>
66
67 #include "mvm.h"
68 #include "sta.h"
69 #include "rs.h"
70
71 static int iwl_mvm_find_free_sta_id(struct iwl_mvm *mvm,
72 enum nl80211_iftype iftype)
73 {
74 int sta_id;
75 u32 reserved_ids = 0;
76
77 BUILD_BUG_ON(IWL_MVM_STATION_COUNT > 32);
78 WARN_ON_ONCE(test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status));
79
80 lockdep_assert_held(&mvm->mutex);
81
82 /* d0i3/d3 assumes the AP's sta_id (of sta vif) is 0. reserve it. */
83 if (iftype != NL80211_IFTYPE_STATION)
84 reserved_ids = BIT(0);
85
86 /* Don't take rcu_read_lock() since we are protected by mvm->mutex */
87 for (sta_id = 0; sta_id < IWL_MVM_STATION_COUNT; sta_id++) {
88 if (BIT(sta_id) & reserved_ids)
89 continue;
90
91 if (!rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
92 lockdep_is_held(&mvm->mutex)))
93 return sta_id;
94 }
95 return IWL_MVM_STATION_COUNT;
96 }
97
98 /* send station add/update command to firmware */
99 int iwl_mvm_sta_send_to_fw(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
100 bool update)
101 {
102 struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv;
103 struct iwl_mvm_add_sta_cmd add_sta_cmd = {
104 .sta_id = mvm_sta->sta_id,
105 .mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color),
106 .add_modify = update ? 1 : 0,
107 .station_flags_msk = cpu_to_le32(STA_FLG_FAT_EN_MSK |
108 STA_FLG_MIMO_EN_MSK),
109 };
110 int ret;
111 u32 status;
112 u32 agg_size = 0, mpdu_dens = 0;
113
114 if (!update) {
115 add_sta_cmd.tfd_queue_msk = cpu_to_le32(mvm_sta->tfd_queue_msk);
116 memcpy(&add_sta_cmd.addr, sta->addr, ETH_ALEN);
117 }
118
119 switch (sta->bandwidth) {
120 case IEEE80211_STA_RX_BW_160:
121 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_160MHZ);
122 /* fall through */
123 case IEEE80211_STA_RX_BW_80:
124 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_80MHZ);
125 /* fall through */
126 case IEEE80211_STA_RX_BW_40:
127 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_40MHZ);
128 /* fall through */
129 case IEEE80211_STA_RX_BW_20:
130 if (sta->ht_cap.ht_supported)
131 add_sta_cmd.station_flags |=
132 cpu_to_le32(STA_FLG_FAT_EN_20MHZ);
133 break;
134 }
135
136 switch (sta->rx_nss) {
137 case 1:
138 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_SISO);
139 break;
140 case 2:
141 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_MIMO2);
142 break;
143 case 3 ... 8:
144 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_MIMO3);
145 break;
146 }
147
148 switch (sta->smps_mode) {
149 case IEEE80211_SMPS_AUTOMATIC:
150 case IEEE80211_SMPS_NUM_MODES:
151 WARN_ON(1);
152 break;
153 case IEEE80211_SMPS_STATIC:
154 /* override NSS */
155 add_sta_cmd.station_flags &= ~cpu_to_le32(STA_FLG_MIMO_EN_MSK);
156 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_SISO);
157 break;
158 case IEEE80211_SMPS_DYNAMIC:
159 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_RTS_MIMO_PROT);
160 break;
161 case IEEE80211_SMPS_OFF:
162 /* nothing */
163 break;
164 }
165
166 if (sta->ht_cap.ht_supported) {
167 add_sta_cmd.station_flags_msk |=
168 cpu_to_le32(STA_FLG_MAX_AGG_SIZE_MSK |
169 STA_FLG_AGG_MPDU_DENS_MSK);
170
171 mpdu_dens = sta->ht_cap.ampdu_density;
172 }
173
174 if (sta->vht_cap.vht_supported) {
175 agg_size = sta->vht_cap.cap &
176 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK;
177 agg_size >>=
178 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_SHIFT;
179 } else if (sta->ht_cap.ht_supported) {
180 agg_size = sta->ht_cap.ampdu_factor;
181 }
182
183 add_sta_cmd.station_flags |=
184 cpu_to_le32(agg_size << STA_FLG_MAX_AGG_SIZE_SHIFT);
185 add_sta_cmd.station_flags |=
186 cpu_to_le32(mpdu_dens << STA_FLG_AGG_MPDU_DENS_SHIFT);
187
188 status = ADD_STA_SUCCESS;
189 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, sizeof(add_sta_cmd),
190 &add_sta_cmd, &status);
191 if (ret)
192 return ret;
193
194 switch (status) {
195 case ADD_STA_SUCCESS:
196 IWL_DEBUG_ASSOC(mvm, "ADD_STA PASSED\n");
197 break;
198 default:
199 ret = -EIO;
200 IWL_ERR(mvm, "ADD_STA failed\n");
201 break;
202 }
203
204 return ret;
205 }
206
207 int iwl_mvm_add_sta(struct iwl_mvm *mvm,
208 struct ieee80211_vif *vif,
209 struct ieee80211_sta *sta)
210 {
211 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
212 struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv;
213 int i, ret, sta_id;
214
215 lockdep_assert_held(&mvm->mutex);
216
217 if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
218 sta_id = iwl_mvm_find_free_sta_id(mvm,
219 ieee80211_vif_type_p2p(vif));
220 else
221 sta_id = mvm_sta->sta_id;
222
223 if (WARN_ON_ONCE(sta_id == IWL_MVM_STATION_COUNT))
224 return -ENOSPC;
225
226 spin_lock_init(&mvm_sta->lock);
227
228 mvm_sta->sta_id = sta_id;
229 mvm_sta->mac_id_n_color = FW_CMD_ID_AND_COLOR(mvmvif->id,
230 mvmvif->color);
231 mvm_sta->vif = vif;
232 mvm_sta->max_agg_bufsize = LINK_QUAL_AGG_FRAME_LIMIT_DEF;
233 mvm_sta->tx_protection = 0;
234 mvm_sta->tt_tx_protection = false;
235
236 /* HW restart, don't assume the memory has been zeroed */
237 atomic_set(&mvm->pending_frames[sta_id], 0);
238 mvm_sta->tid_disable_agg = 0;
239 mvm_sta->tfd_queue_msk = 0;
240 for (i = 0; i < IEEE80211_NUM_ACS; i++)
241 if (vif->hw_queue[i] != IEEE80211_INVAL_HW_QUEUE)
242 mvm_sta->tfd_queue_msk |= BIT(vif->hw_queue[i]);
243
244 /* for HW restart - reset everything but the sequence number */
245 for (i = 0; i < IWL_MAX_TID_COUNT; i++) {
246 u16 seq = mvm_sta->tid_data[i].seq_number;
247 memset(&mvm_sta->tid_data[i], 0, sizeof(mvm_sta->tid_data[i]));
248 mvm_sta->tid_data[i].seq_number = seq;
249 }
250
251 ret = iwl_mvm_sta_send_to_fw(mvm, sta, false);
252 if (ret)
253 return ret;
254
255 if (vif->type == NL80211_IFTYPE_STATION) {
256 if (!sta->tdls) {
257 WARN_ON(mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT);
258 mvmvif->ap_sta_id = sta_id;
259 } else {
260 WARN_ON(mvmvif->ap_sta_id == IWL_MVM_STATION_COUNT);
261 }
262 }
263
264 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta_id], sta);
265
266 return 0;
267 }
268
269 int iwl_mvm_update_sta(struct iwl_mvm *mvm,
270 struct ieee80211_vif *vif,
271 struct ieee80211_sta *sta)
272 {
273 return iwl_mvm_sta_send_to_fw(mvm, sta, true);
274 }
275
276 int iwl_mvm_drain_sta(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta,
277 bool drain)
278 {
279 struct iwl_mvm_add_sta_cmd cmd = {};
280 int ret;
281 u32 status;
282
283 lockdep_assert_held(&mvm->mutex);
284
285 cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color);
286 cmd.sta_id = mvmsta->sta_id;
287 cmd.add_modify = STA_MODE_MODIFY;
288 cmd.station_flags = drain ? cpu_to_le32(STA_FLG_DRAIN_FLOW) : 0;
289 cmd.station_flags_msk = cpu_to_le32(STA_FLG_DRAIN_FLOW);
290
291 status = ADD_STA_SUCCESS;
292 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, sizeof(cmd),
293 &cmd, &status);
294 if (ret)
295 return ret;
296
297 switch (status) {
298 case ADD_STA_SUCCESS:
299 IWL_DEBUG_INFO(mvm, "Frames for staid %d will drained in fw\n",
300 mvmsta->sta_id);
301 break;
302 default:
303 ret = -EIO;
304 IWL_ERR(mvm, "Couldn't drain frames for staid %d\n",
305 mvmsta->sta_id);
306 break;
307 }
308
309 return ret;
310 }
311
312 /*
313 * Remove a station from the FW table. Before sending the command to remove
314 * the station validate that the station is indeed known to the driver (sanity
315 * only).
316 */
317 static int iwl_mvm_rm_sta_common(struct iwl_mvm *mvm, u8 sta_id)
318 {
319 struct ieee80211_sta *sta;
320 struct iwl_mvm_rm_sta_cmd rm_sta_cmd = {
321 .sta_id = sta_id,
322 };
323 int ret;
324
325 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
326 lockdep_is_held(&mvm->mutex));
327
328 /* Note: internal stations are marked as error values */
329 if (!sta) {
330 IWL_ERR(mvm, "Invalid station id\n");
331 return -EINVAL;
332 }
333
334 ret = iwl_mvm_send_cmd_pdu(mvm, REMOVE_STA, 0,
335 sizeof(rm_sta_cmd), &rm_sta_cmd);
336 if (ret) {
337 IWL_ERR(mvm, "Failed to remove station. Id=%d\n", sta_id);
338 return ret;
339 }
340
341 return 0;
342 }
343
344 void iwl_mvm_sta_drained_wk(struct work_struct *wk)
345 {
346 struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm, sta_drained_wk);
347 u8 sta_id;
348
349 /*
350 * The mutex is needed because of the SYNC cmd, but not only: if the
351 * work would run concurrently with iwl_mvm_rm_sta, it would run before
352 * iwl_mvm_rm_sta sets the station as busy, and exit. Then
353 * iwl_mvm_rm_sta would set the station as busy, and nobody will clean
354 * that later.
355 */
356 mutex_lock(&mvm->mutex);
357
358 for_each_set_bit(sta_id, mvm->sta_drained, IWL_MVM_STATION_COUNT) {
359 int ret;
360 struct ieee80211_sta *sta =
361 rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
362 lockdep_is_held(&mvm->mutex));
363
364 /*
365 * This station is in use or RCU-removed; the latter happens in
366 * managed mode, where mac80211 removes the station before we
367 * can remove it from firmware (we can only do that after the
368 * MAC is marked unassociated), and possibly while the deauth
369 * frame to disconnect from the AP is still queued. Then, the
370 * station pointer is -ENOENT when the last skb is reclaimed.
371 */
372 if (!IS_ERR(sta) || PTR_ERR(sta) == -ENOENT)
373 continue;
374
375 if (PTR_ERR(sta) == -EINVAL) {
376 IWL_ERR(mvm, "Drained sta %d, but it is internal?\n",
377 sta_id);
378 continue;
379 }
380
381 if (!sta) {
382 IWL_ERR(mvm, "Drained sta %d, but it was NULL?\n",
383 sta_id);
384 continue;
385 }
386
387 WARN_ON(PTR_ERR(sta) != -EBUSY);
388 /* This station was removed and we waited until it got drained,
389 * we can now proceed and remove it.
390 */
391 ret = iwl_mvm_rm_sta_common(mvm, sta_id);
392 if (ret) {
393 IWL_ERR(mvm,
394 "Couldn't remove sta %d after it was drained\n",
395 sta_id);
396 continue;
397 }
398 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta_id], NULL);
399 clear_bit(sta_id, mvm->sta_drained);
400 }
401
402 mutex_unlock(&mvm->mutex);
403 }
404
405 int iwl_mvm_rm_sta(struct iwl_mvm *mvm,
406 struct ieee80211_vif *vif,
407 struct ieee80211_sta *sta)
408 {
409 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
410 struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv;
411 int ret;
412
413 lockdep_assert_held(&mvm->mutex);
414
415 if (vif->type == NL80211_IFTYPE_STATION &&
416 mvmvif->ap_sta_id == mvm_sta->sta_id) {
417 /* flush its queues here since we are freeing mvm_sta */
418 ret = iwl_mvm_flush_tx_path(mvm, mvm_sta->tfd_queue_msk, true);
419
420 /* if we are associated - we can't remove the AP STA now */
421 if (vif->bss_conf.assoc)
422 return ret;
423
424 /* unassoc - go ahead - remove the AP STA now */
425 mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
426
427 /* clear d0i3_ap_sta_id if no longer relevant */
428 if (mvm->d0i3_ap_sta_id == mvm_sta->sta_id)
429 mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
430 }
431
432 /*
433 * Make sure that the tx response code sees the station as -EBUSY and
434 * calls the drain worker.
435 */
436 spin_lock_bh(&mvm_sta->lock);
437 /*
438 * There are frames pending on the AC queues for this station.
439 * We need to wait until all the frames are drained...
440 */
441 if (atomic_read(&mvm->pending_frames[mvm_sta->sta_id])) {
442 rcu_assign_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id],
443 ERR_PTR(-EBUSY));
444 spin_unlock_bh(&mvm_sta->lock);
445 ret = iwl_mvm_drain_sta(mvm, mvm_sta, true);
446 } else {
447 spin_unlock_bh(&mvm_sta->lock);
448 ret = iwl_mvm_rm_sta_common(mvm, mvm_sta->sta_id);
449 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[mvm_sta->sta_id], NULL);
450 }
451
452 return ret;
453 }
454
455 int iwl_mvm_rm_sta_id(struct iwl_mvm *mvm,
456 struct ieee80211_vif *vif,
457 u8 sta_id)
458 {
459 int ret = iwl_mvm_rm_sta_common(mvm, sta_id);
460
461 lockdep_assert_held(&mvm->mutex);
462
463 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta_id], NULL);
464 return ret;
465 }
466
467 int iwl_mvm_allocate_int_sta(struct iwl_mvm *mvm, struct iwl_mvm_int_sta *sta,
468 u32 qmask, enum nl80211_iftype iftype)
469 {
470 if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
471 sta->sta_id = iwl_mvm_find_free_sta_id(mvm, iftype);
472 if (WARN_ON_ONCE(sta->sta_id == IWL_MVM_STATION_COUNT))
473 return -ENOSPC;
474 }
475
476 sta->tfd_queue_msk = qmask;
477
478 /* put a non-NULL value so iterating over the stations won't stop */
479 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta->sta_id], ERR_PTR(-EINVAL));
480 return 0;
481 }
482
483 void iwl_mvm_dealloc_int_sta(struct iwl_mvm *mvm, struct iwl_mvm_int_sta *sta)
484 {
485 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta->sta_id], NULL);
486 memset(sta, 0, sizeof(struct iwl_mvm_int_sta));
487 sta->sta_id = IWL_MVM_STATION_COUNT;
488 }
489
490 static int iwl_mvm_add_int_sta_common(struct iwl_mvm *mvm,
491 struct iwl_mvm_int_sta *sta,
492 const u8 *addr,
493 u16 mac_id, u16 color)
494 {
495 struct iwl_mvm_add_sta_cmd cmd;
496 int ret;
497 u32 status;
498
499 lockdep_assert_held(&mvm->mutex);
500
501 memset(&cmd, 0, sizeof(cmd));
502 cmd.sta_id = sta->sta_id;
503 cmd.mac_id_n_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(mac_id,
504 color));
505
506 cmd.tfd_queue_msk = cpu_to_le32(sta->tfd_queue_msk);
507
508 if (addr)
509 memcpy(cmd.addr, addr, ETH_ALEN);
510
511 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, sizeof(cmd),
512 &cmd, &status);
513 if (ret)
514 return ret;
515
516 switch (status) {
517 case ADD_STA_SUCCESS:
518 IWL_DEBUG_INFO(mvm, "Internal station added.\n");
519 return 0;
520 default:
521 ret = -EIO;
522 IWL_ERR(mvm, "Add internal station failed, status=0x%x\n",
523 status);
524 break;
525 }
526 return ret;
527 }
528
529 int iwl_mvm_add_aux_sta(struct iwl_mvm *mvm)
530 {
531 int ret;
532
533 lockdep_assert_held(&mvm->mutex);
534
535 /* Map Aux queue to fifo - needs to happen before adding Aux station */
536 iwl_trans_ac_txq_enable(mvm->trans, mvm->aux_queue,
537 IWL_MVM_TX_FIFO_MCAST);
538
539 /* Allocate aux station and assign to it the aux queue */
540 ret = iwl_mvm_allocate_int_sta(mvm, &mvm->aux_sta, BIT(mvm->aux_queue),
541 NL80211_IFTYPE_UNSPECIFIED);
542 if (ret)
543 return ret;
544
545 ret = iwl_mvm_add_int_sta_common(mvm, &mvm->aux_sta, NULL,
546 MAC_INDEX_AUX, 0);
547
548 if (ret)
549 iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta);
550 return ret;
551 }
552
553 /*
554 * Send the add station command for the vif's broadcast station.
555 * Assumes that the station was already allocated.
556 *
557 * @mvm: the mvm component
558 * @vif: the interface to which the broadcast station is added
559 * @bsta: the broadcast station to add.
560 */
561 int iwl_mvm_send_add_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
562 {
563 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
564 struct iwl_mvm_int_sta *bsta = &mvmvif->bcast_sta;
565 static const u8 _baddr[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
566 const u8 *baddr = _baddr;
567
568 lockdep_assert_held(&mvm->mutex);
569
570 if (vif->type == NL80211_IFTYPE_ADHOC)
571 baddr = vif->bss_conf.bssid;
572
573 if (WARN_ON_ONCE(bsta->sta_id == IWL_MVM_STATION_COUNT))
574 return -ENOSPC;
575
576 return iwl_mvm_add_int_sta_common(mvm, bsta, baddr,
577 mvmvif->id, mvmvif->color);
578 }
579
580 /* Send the FW a request to remove the station from it's internal data
581 * structures, but DO NOT remove the entry from the local data structures. */
582 int iwl_mvm_send_rm_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
583 {
584 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
585 int ret;
586
587 lockdep_assert_held(&mvm->mutex);
588
589 ret = iwl_mvm_rm_sta_common(mvm, mvmvif->bcast_sta.sta_id);
590 if (ret)
591 IWL_WARN(mvm, "Failed sending remove station\n");
592 return ret;
593 }
594
595 int iwl_mvm_alloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
596 {
597 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
598 u32 qmask;
599
600 lockdep_assert_held(&mvm->mutex);
601
602 qmask = iwl_mvm_mac_get_queues_mask(mvm, vif);
603
604 /*
605 * The firmware defines the TFD queue mask to only be relevant
606 * for *unicast* queues, so the multicast (CAB) queue shouldn't
607 * be included.
608 */
609 if (vif->type == NL80211_IFTYPE_AP)
610 qmask &= ~BIT(vif->cab_queue);
611
612 return iwl_mvm_allocate_int_sta(mvm, &mvmvif->bcast_sta, qmask,
613 ieee80211_vif_type_p2p(vif));
614 }
615
616 /* Allocate a new station entry for the broadcast station to the given vif,
617 * and send it to the FW.
618 * Note that each P2P mac should have its own broadcast station.
619 *
620 * @mvm: the mvm component
621 * @vif: the interface to which the broadcast station is added
622 * @bsta: the broadcast station to add. */
623 int iwl_mvm_add_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
624 {
625 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
626 struct iwl_mvm_int_sta *bsta = &mvmvif->bcast_sta;
627 int ret;
628
629 lockdep_assert_held(&mvm->mutex);
630
631 ret = iwl_mvm_alloc_bcast_sta(mvm, vif);
632 if (ret)
633 return ret;
634
635 ret = iwl_mvm_send_add_bcast_sta(mvm, vif);
636
637 if (ret)
638 iwl_mvm_dealloc_int_sta(mvm, bsta);
639
640 return ret;
641 }
642
643 void iwl_mvm_dealloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
644 {
645 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
646
647 iwl_mvm_dealloc_int_sta(mvm, &mvmvif->bcast_sta);
648 }
649
650 /*
651 * Send the FW a request to remove the station from it's internal data
652 * structures, and in addition remove it from the local data structure.
653 */
654 int iwl_mvm_rm_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
655 {
656 int ret;
657
658 lockdep_assert_held(&mvm->mutex);
659
660 ret = iwl_mvm_send_rm_bcast_sta(mvm, vif);
661
662 iwl_mvm_dealloc_bcast_sta(mvm, vif);
663
664 return ret;
665 }
666
667 #define IWL_MAX_RX_BA_SESSIONS 16
668
669 int iwl_mvm_sta_rx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
670 int tid, u16 ssn, bool start)
671 {
672 struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv;
673 struct iwl_mvm_add_sta_cmd cmd = {};
674 int ret;
675 u32 status;
676
677 lockdep_assert_held(&mvm->mutex);
678
679 if (start && mvm->rx_ba_sessions >= IWL_MAX_RX_BA_SESSIONS) {
680 IWL_WARN(mvm, "Not enough RX BA SESSIONS\n");
681 return -ENOSPC;
682 }
683
684 cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color);
685 cmd.sta_id = mvm_sta->sta_id;
686 cmd.add_modify = STA_MODE_MODIFY;
687 if (start) {
688 cmd.add_immediate_ba_tid = (u8) tid;
689 cmd.add_immediate_ba_ssn = cpu_to_le16(ssn);
690 } else {
691 cmd.remove_immediate_ba_tid = (u8) tid;
692 }
693 cmd.modify_mask = start ? STA_MODIFY_ADD_BA_TID :
694 STA_MODIFY_REMOVE_BA_TID;
695
696 status = ADD_STA_SUCCESS;
697 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, sizeof(cmd),
698 &cmd, &status);
699 if (ret)
700 return ret;
701
702 switch (status) {
703 case ADD_STA_SUCCESS:
704 IWL_DEBUG_INFO(mvm, "RX BA Session %sed in fw\n",
705 start ? "start" : "stopp");
706 break;
707 case ADD_STA_IMMEDIATE_BA_FAILURE:
708 IWL_WARN(mvm, "RX BA Session refused by fw\n");
709 ret = -ENOSPC;
710 break;
711 default:
712 ret = -EIO;
713 IWL_ERR(mvm, "RX BA Session failed %sing, status 0x%x\n",
714 start ? "start" : "stopp", status);
715 break;
716 }
717
718 if (!ret) {
719 if (start)
720 mvm->rx_ba_sessions++;
721 else if (mvm->rx_ba_sessions > 0)
722 /* check that restart flow didn't zero the counter */
723 mvm->rx_ba_sessions--;
724 }
725
726 return ret;
727 }
728
729 static int iwl_mvm_sta_tx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
730 int tid, u8 queue, bool start)
731 {
732 struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv;
733 struct iwl_mvm_add_sta_cmd cmd = {};
734 int ret;
735 u32 status;
736
737 lockdep_assert_held(&mvm->mutex);
738
739 if (start) {
740 mvm_sta->tfd_queue_msk |= BIT(queue);
741 mvm_sta->tid_disable_agg &= ~BIT(tid);
742 } else {
743 mvm_sta->tfd_queue_msk &= ~BIT(queue);
744 mvm_sta->tid_disable_agg |= BIT(tid);
745 }
746
747 cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color);
748 cmd.sta_id = mvm_sta->sta_id;
749 cmd.add_modify = STA_MODE_MODIFY;
750 cmd.modify_mask = STA_MODIFY_QUEUES | STA_MODIFY_TID_DISABLE_TX;
751 cmd.tfd_queue_msk = cpu_to_le32(mvm_sta->tfd_queue_msk);
752 cmd.tid_disable_tx = cpu_to_le16(mvm_sta->tid_disable_agg);
753
754 status = ADD_STA_SUCCESS;
755 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, sizeof(cmd),
756 &cmd, &status);
757 if (ret)
758 return ret;
759
760 switch (status) {
761 case ADD_STA_SUCCESS:
762 break;
763 default:
764 ret = -EIO;
765 IWL_ERR(mvm, "TX BA Session failed %sing, status 0x%x\n",
766 start ? "start" : "stopp", status);
767 break;
768 }
769
770 return ret;
771 }
772
773 const u8 tid_to_mac80211_ac[] = {
774 IEEE80211_AC_BE,
775 IEEE80211_AC_BK,
776 IEEE80211_AC_BK,
777 IEEE80211_AC_BE,
778 IEEE80211_AC_VI,
779 IEEE80211_AC_VI,
780 IEEE80211_AC_VO,
781 IEEE80211_AC_VO,
782 };
783
784 static const u8 tid_to_ucode_ac[] = {
785 AC_BE,
786 AC_BK,
787 AC_BK,
788 AC_BE,
789 AC_VI,
790 AC_VI,
791 AC_VO,
792 AC_VO,
793 };
794
795 int iwl_mvm_sta_tx_agg_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
796 struct ieee80211_sta *sta, u16 tid, u16 *ssn)
797 {
798 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
799 struct iwl_mvm_tid_data *tid_data;
800 int txq_id;
801
802 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
803 return -EINVAL;
804
805 if (mvmsta->tid_data[tid].state != IWL_AGG_OFF) {
806 IWL_ERR(mvm, "Start AGG when state is not IWL_AGG_OFF %d!\n",
807 mvmsta->tid_data[tid].state);
808 return -ENXIO;
809 }
810
811 lockdep_assert_held(&mvm->mutex);
812
813 for (txq_id = mvm->first_agg_queue;
814 txq_id <= mvm->last_agg_queue; txq_id++)
815 if (mvm->queue_to_mac80211[txq_id] ==
816 IWL_INVALID_MAC80211_QUEUE)
817 break;
818
819 if (txq_id > mvm->last_agg_queue) {
820 IWL_ERR(mvm, "Failed to allocate agg queue\n");
821 return -EIO;
822 }
823
824 spin_lock_bh(&mvmsta->lock);
825
826 /* possible race condition - we entered D0i3 while starting agg */
827 if (test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status)) {
828 spin_unlock_bh(&mvmsta->lock);
829 IWL_ERR(mvm, "Entered D0i3 while starting Tx agg\n");
830 return -EIO;
831 }
832
833 /* the new tx queue is still connected to the same mac80211 queue */
834 mvm->queue_to_mac80211[txq_id] = vif->hw_queue[tid_to_mac80211_ac[tid]];
835
836 tid_data = &mvmsta->tid_data[tid];
837 tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
838 tid_data->txq_id = txq_id;
839 *ssn = tid_data->ssn;
840
841 IWL_DEBUG_TX_QUEUES(mvm,
842 "Start AGG: sta %d tid %d queue %d - ssn = %d, next_recl = %d\n",
843 mvmsta->sta_id, tid, txq_id, tid_data->ssn,
844 tid_data->next_reclaimed);
845
846 if (tid_data->ssn == tid_data->next_reclaimed) {
847 tid_data->state = IWL_AGG_STARTING;
848 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
849 } else {
850 tid_data->state = IWL_EMPTYING_HW_QUEUE_ADDBA;
851 }
852
853 spin_unlock_bh(&mvmsta->lock);
854
855 return 0;
856 }
857
858 int iwl_mvm_sta_tx_agg_oper(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
859 struct ieee80211_sta *sta, u16 tid, u8 buf_size)
860 {
861 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
862 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
863 int queue, fifo, ret;
864 u16 ssn;
865
866 buf_size = min_t(int, buf_size, LINK_QUAL_AGG_FRAME_LIMIT_DEF);
867
868 spin_lock_bh(&mvmsta->lock);
869 ssn = tid_data->ssn;
870 queue = tid_data->txq_id;
871 tid_data->state = IWL_AGG_ON;
872 tid_data->ssn = 0xffff;
873 spin_unlock_bh(&mvmsta->lock);
874
875 fifo = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]];
876
877 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true);
878 if (ret)
879 return -EIO;
880
881 iwl_trans_txq_enable(mvm->trans, queue, fifo, mvmsta->sta_id, tid,
882 buf_size, ssn);
883
884 /*
885 * Even though in theory the peer could have different
886 * aggregation reorder buffer sizes for different sessions,
887 * our ucode doesn't allow for that and has a global limit
888 * for each station. Therefore, use the minimum of all the
889 * aggregation sessions and our default value.
890 */
891 mvmsta->max_agg_bufsize =
892 min(mvmsta->max_agg_bufsize, buf_size);
893 mvmsta->lq_sta.lq.agg_frame_cnt_limit = mvmsta->max_agg_bufsize;
894
895 IWL_DEBUG_HT(mvm, "Tx aggregation enabled on ra = %pM tid = %d\n",
896 sta->addr, tid);
897
898 return iwl_mvm_send_lq_cmd(mvm, &mvmsta->lq_sta.lq, false);
899 }
900
901 int iwl_mvm_sta_tx_agg_stop(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
902 struct ieee80211_sta *sta, u16 tid)
903 {
904 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
905 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
906 u16 txq_id;
907 int err;
908
909
910 /*
911 * If mac80211 is cleaning its state, then say that we finished since
912 * our state has been cleared anyway.
913 */
914 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
915 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
916 return 0;
917 }
918
919 spin_lock_bh(&mvmsta->lock);
920
921 txq_id = tid_data->txq_id;
922
923 IWL_DEBUG_TX_QUEUES(mvm, "Stop AGG: sta %d tid %d q %d state %d\n",
924 mvmsta->sta_id, tid, txq_id, tid_data->state);
925
926 switch (tid_data->state) {
927 case IWL_AGG_ON:
928 tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
929
930 IWL_DEBUG_TX_QUEUES(mvm,
931 "ssn = %d, next_recl = %d\n",
932 tid_data->ssn, tid_data->next_reclaimed);
933
934 /* There are still packets for this RA / TID in the HW */
935 if (tid_data->ssn != tid_data->next_reclaimed) {
936 tid_data->state = IWL_EMPTYING_HW_QUEUE_DELBA;
937 err = 0;
938 break;
939 }
940
941 tid_data->ssn = 0xffff;
942 iwl_trans_txq_disable(mvm->trans, txq_id, true);
943 /* fall through */
944 case IWL_AGG_STARTING:
945 case IWL_EMPTYING_HW_QUEUE_ADDBA:
946 /*
947 * The agg session has been stopped before it was set up. This
948 * can happen when the AddBA timer times out for example.
949 */
950
951 /* No barriers since we are under mutex */
952 lockdep_assert_held(&mvm->mutex);
953 mvm->queue_to_mac80211[txq_id] = IWL_INVALID_MAC80211_QUEUE;
954
955 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
956 tid_data->state = IWL_AGG_OFF;
957 err = 0;
958 break;
959 default:
960 IWL_ERR(mvm,
961 "Stopping AGG while state not ON or starting for %d on %d (%d)\n",
962 mvmsta->sta_id, tid, tid_data->state);
963 IWL_ERR(mvm,
964 "\ttid_data->txq_id = %d\n", tid_data->txq_id);
965 err = -EINVAL;
966 }
967
968 spin_unlock_bh(&mvmsta->lock);
969
970 return err;
971 }
972
973 int iwl_mvm_sta_tx_agg_flush(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
974 struct ieee80211_sta *sta, u16 tid)
975 {
976 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
977 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
978 u16 txq_id;
979 enum iwl_mvm_agg_state old_state;
980
981 /*
982 * First set the agg state to OFF to avoid calling
983 * ieee80211_stop_tx_ba_cb in iwl_mvm_check_ratid_empty.
984 */
985 spin_lock_bh(&mvmsta->lock);
986 txq_id = tid_data->txq_id;
987 IWL_DEBUG_TX_QUEUES(mvm, "Flush AGG: sta %d tid %d q %d state %d\n",
988 mvmsta->sta_id, tid, txq_id, tid_data->state);
989 old_state = tid_data->state;
990 tid_data->state = IWL_AGG_OFF;
991 spin_unlock_bh(&mvmsta->lock);
992
993 if (old_state >= IWL_AGG_ON) {
994 if (iwl_mvm_flush_tx_path(mvm, BIT(txq_id), true))
995 IWL_ERR(mvm, "Couldn't flush the AGG queue\n");
996
997 iwl_trans_txq_disable(mvm->trans, tid_data->txq_id, true);
998 }
999
1000 mvm->queue_to_mac80211[tid_data->txq_id] =
1001 IWL_INVALID_MAC80211_QUEUE;
1002
1003 return 0;
1004 }
1005
1006 static int iwl_mvm_set_fw_key_idx(struct iwl_mvm *mvm)
1007 {
1008 int i;
1009
1010 lockdep_assert_held(&mvm->mutex);
1011
1012 i = find_first_zero_bit(mvm->fw_key_table, STA_KEY_MAX_NUM);
1013
1014 if (i == STA_KEY_MAX_NUM)
1015 return STA_KEY_IDX_INVALID;
1016
1017 __set_bit(i, mvm->fw_key_table);
1018
1019 return i;
1020 }
1021
1022 static u8 iwl_mvm_get_key_sta_id(struct ieee80211_vif *vif,
1023 struct ieee80211_sta *sta)
1024 {
1025 struct iwl_mvm_vif *mvmvif = (void *)vif->drv_priv;
1026
1027 if (sta) {
1028 struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv;
1029
1030 return mvm_sta->sta_id;
1031 }
1032
1033 /*
1034 * The device expects GTKs for station interfaces to be
1035 * installed as GTKs for the AP station. If we have no
1036 * station ID, then use AP's station ID.
1037 */
1038 if (vif->type == NL80211_IFTYPE_STATION &&
1039 mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT)
1040 return mvmvif->ap_sta_id;
1041
1042 return IWL_MVM_STATION_COUNT;
1043 }
1044
1045 static int iwl_mvm_send_sta_key(struct iwl_mvm *mvm,
1046 struct iwl_mvm_sta *mvm_sta,
1047 struct ieee80211_key_conf *keyconf,
1048 u8 sta_id, u32 tkip_iv32, u16 *tkip_p1k,
1049 u32 cmd_flags)
1050 {
1051 struct iwl_mvm_add_sta_key_cmd cmd = {};
1052 __le16 key_flags;
1053 int ret, status;
1054 u16 keyidx;
1055 int i;
1056
1057 keyidx = (keyconf->keyidx << STA_KEY_FLG_KEYID_POS) &
1058 STA_KEY_FLG_KEYID_MSK;
1059 key_flags = cpu_to_le16(keyidx);
1060 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_KEY_MAP);
1061
1062 switch (keyconf->cipher) {
1063 case WLAN_CIPHER_SUITE_TKIP:
1064 key_flags |= cpu_to_le16(STA_KEY_FLG_TKIP);
1065 cmd.tkip_rx_tsc_byte2 = tkip_iv32;
1066 for (i = 0; i < 5; i++)
1067 cmd.tkip_rx_ttak[i] = cpu_to_le16(tkip_p1k[i]);
1068 memcpy(cmd.key, keyconf->key, keyconf->keylen);
1069 break;
1070 case WLAN_CIPHER_SUITE_CCMP:
1071 key_flags |= cpu_to_le16(STA_KEY_FLG_CCM);
1072 memcpy(cmd.key, keyconf->key, keyconf->keylen);
1073 break;
1074 default:
1075 key_flags |= cpu_to_le16(STA_KEY_FLG_EXT);
1076 memcpy(cmd.key, keyconf->key, keyconf->keylen);
1077 }
1078
1079 if (!(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE))
1080 key_flags |= cpu_to_le16(STA_KEY_MULTICAST);
1081
1082 cmd.key_offset = keyconf->hw_key_idx;
1083 cmd.key_flags = key_flags;
1084 cmd.sta_id = sta_id;
1085
1086 status = ADD_STA_SUCCESS;
1087 if (cmd_flags & CMD_ASYNC)
1088 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA_KEY, CMD_ASYNC,
1089 sizeof(cmd), &cmd);
1090 else
1091 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, sizeof(cmd),
1092 &cmd, &status);
1093
1094 switch (status) {
1095 case ADD_STA_SUCCESS:
1096 IWL_DEBUG_WEP(mvm, "MODIFY_STA: set dynamic key passed\n");
1097 break;
1098 default:
1099 ret = -EIO;
1100 IWL_ERR(mvm, "MODIFY_STA: set dynamic key failed\n");
1101 break;
1102 }
1103
1104 return ret;
1105 }
1106
1107 static int iwl_mvm_send_sta_igtk(struct iwl_mvm *mvm,
1108 struct ieee80211_key_conf *keyconf,
1109 u8 sta_id, bool remove_key)
1110 {
1111 struct iwl_mvm_mgmt_mcast_key_cmd igtk_cmd = {};
1112
1113 /* verify the key details match the required command's expectations */
1114 if (WARN_ON((keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC) ||
1115 (keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE) ||
1116 (keyconf->keyidx != 4 && keyconf->keyidx != 5)))
1117 return -EINVAL;
1118
1119 igtk_cmd.key_id = cpu_to_le32(keyconf->keyidx);
1120 igtk_cmd.sta_id = cpu_to_le32(sta_id);
1121
1122 if (remove_key) {
1123 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_NOT_VALID);
1124 } else {
1125 struct ieee80211_key_seq seq;
1126 const u8 *pn;
1127
1128 memcpy(igtk_cmd.IGTK, keyconf->key, keyconf->keylen);
1129 ieee80211_aes_cmac_calculate_k1_k2(keyconf,
1130 igtk_cmd.K1, igtk_cmd.K2);
1131 ieee80211_get_key_rx_seq(keyconf, 0, &seq);
1132 pn = seq.aes_cmac.pn;
1133 igtk_cmd.receive_seq_cnt = cpu_to_le64(((u64) pn[5] << 0) |
1134 ((u64) pn[4] << 8) |
1135 ((u64) pn[3] << 16) |
1136 ((u64) pn[2] << 24) |
1137 ((u64) pn[1] << 32) |
1138 ((u64) pn[0] << 40));
1139 }
1140
1141 IWL_DEBUG_INFO(mvm, "%s igtk for sta %u\n",
1142 remove_key ? "removing" : "installing",
1143 igtk_cmd.sta_id);
1144
1145 return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, 0,
1146 sizeof(igtk_cmd), &igtk_cmd);
1147 }
1148
1149
1150 static inline u8 *iwl_mvm_get_mac_addr(struct iwl_mvm *mvm,
1151 struct ieee80211_vif *vif,
1152 struct ieee80211_sta *sta)
1153 {
1154 struct iwl_mvm_vif *mvmvif = (void *)vif->drv_priv;
1155
1156 if (sta)
1157 return sta->addr;
1158
1159 if (vif->type == NL80211_IFTYPE_STATION &&
1160 mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT) {
1161 u8 sta_id = mvmvif->ap_sta_id;
1162 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
1163 lockdep_is_held(&mvm->mutex));
1164 return sta->addr;
1165 }
1166
1167
1168 return NULL;
1169 }
1170
1171 int iwl_mvm_set_sta_key(struct iwl_mvm *mvm,
1172 struct ieee80211_vif *vif,
1173 struct ieee80211_sta *sta,
1174 struct ieee80211_key_conf *keyconf,
1175 bool have_key_offset)
1176 {
1177 struct iwl_mvm_sta *mvm_sta;
1178 int ret;
1179 u8 *addr, sta_id;
1180 struct ieee80211_key_seq seq;
1181 u16 p1k[5];
1182
1183 lockdep_assert_held(&mvm->mutex);
1184
1185 /* Get the station id from the mvm local station table */
1186 sta_id = iwl_mvm_get_key_sta_id(vif, sta);
1187 if (sta_id == IWL_MVM_STATION_COUNT) {
1188 IWL_ERR(mvm, "Failed to find station id\n");
1189 return -EINVAL;
1190 }
1191
1192 if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC) {
1193 ret = iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, false);
1194 goto end;
1195 }
1196
1197 /*
1198 * It is possible that the 'sta' parameter is NULL, and thus
1199 * there is a need to retrieve the sta from the local station table.
1200 */
1201 if (!sta) {
1202 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
1203 lockdep_is_held(&mvm->mutex));
1204 if (IS_ERR_OR_NULL(sta)) {
1205 IWL_ERR(mvm, "Invalid station id\n");
1206 return -EINVAL;
1207 }
1208 }
1209
1210 mvm_sta = (struct iwl_mvm_sta *)sta->drv_priv;
1211 if (WARN_ON_ONCE(mvm_sta->vif != vif))
1212 return -EINVAL;
1213
1214 if (!have_key_offset) {
1215 /*
1216 * The D3 firmware hardcodes the PTK offset to 0, so we have to
1217 * configure it there. As a result, this workaround exists to
1218 * let the caller set the key offset (hw_key_idx), see d3.c.
1219 */
1220 keyconf->hw_key_idx = iwl_mvm_set_fw_key_idx(mvm);
1221 if (keyconf->hw_key_idx == STA_KEY_IDX_INVALID)
1222 return -ENOSPC;
1223 }
1224
1225 switch (keyconf->cipher) {
1226 case WLAN_CIPHER_SUITE_TKIP:
1227 addr = iwl_mvm_get_mac_addr(mvm, vif, sta);
1228 /* get phase 1 key from mac80211 */
1229 ieee80211_get_key_rx_seq(keyconf, 0, &seq);
1230 ieee80211_get_tkip_rx_p1k(keyconf, addr, seq.tkip.iv32, p1k);
1231 ret = iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, sta_id,
1232 seq.tkip.iv32, p1k, 0);
1233 break;
1234 case WLAN_CIPHER_SUITE_CCMP:
1235 ret = iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, sta_id,
1236 0, NULL, 0);
1237 break;
1238 default:
1239 ret = iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf,
1240 sta_id, 0, NULL, 0);
1241 }
1242
1243 if (ret)
1244 __clear_bit(keyconf->hw_key_idx, mvm->fw_key_table);
1245
1246 end:
1247 IWL_DEBUG_WEP(mvm, "key: cipher=%x len=%d idx=%d sta=%pM ret=%d\n",
1248 keyconf->cipher, keyconf->keylen, keyconf->keyidx,
1249 sta->addr, ret);
1250 return ret;
1251 }
1252
1253 int iwl_mvm_remove_sta_key(struct iwl_mvm *mvm,
1254 struct ieee80211_vif *vif,
1255 struct ieee80211_sta *sta,
1256 struct ieee80211_key_conf *keyconf)
1257 {
1258 struct iwl_mvm_sta *mvm_sta;
1259 struct iwl_mvm_add_sta_key_cmd cmd = {};
1260 __le16 key_flags;
1261 int ret, status;
1262 u8 sta_id;
1263
1264 lockdep_assert_held(&mvm->mutex);
1265
1266 /* Get the station id from the mvm local station table */
1267 sta_id = iwl_mvm_get_key_sta_id(vif, sta);
1268
1269 IWL_DEBUG_WEP(mvm, "mvm remove dynamic key: idx=%d sta=%d\n",
1270 keyconf->keyidx, sta_id);
1271
1272 if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC)
1273 return iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, true);
1274
1275 ret = __test_and_clear_bit(keyconf->hw_key_idx, mvm->fw_key_table);
1276 if (!ret) {
1277 IWL_ERR(mvm, "offset %d not used in fw key table.\n",
1278 keyconf->hw_key_idx);
1279 return -ENOENT;
1280 }
1281
1282 if (sta_id == IWL_MVM_STATION_COUNT) {
1283 IWL_DEBUG_WEP(mvm, "station non-existent, early return.\n");
1284 return 0;
1285 }
1286
1287 /*
1288 * It is possible that the 'sta' parameter is NULL, and thus
1289 * there is a need to retrieve the sta from the local station table,
1290 * for example when a GTK is removed (where the sta_id will then be
1291 * the AP ID, and no station was passed by mac80211.)
1292 */
1293 if (!sta) {
1294 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
1295 lockdep_is_held(&mvm->mutex));
1296 if (!sta) {
1297 IWL_ERR(mvm, "Invalid station id\n");
1298 return -EINVAL;
1299 }
1300 }
1301
1302 mvm_sta = (struct iwl_mvm_sta *)sta->drv_priv;
1303 if (WARN_ON_ONCE(mvm_sta->vif != vif))
1304 return -EINVAL;
1305
1306 key_flags = cpu_to_le16((keyconf->keyidx << STA_KEY_FLG_KEYID_POS) &
1307 STA_KEY_FLG_KEYID_MSK);
1308 key_flags |= cpu_to_le16(STA_KEY_FLG_NO_ENC | STA_KEY_FLG_WEP_KEY_MAP);
1309 key_flags |= cpu_to_le16(STA_KEY_NOT_VALID);
1310
1311 if (!(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE))
1312 key_flags |= cpu_to_le16(STA_KEY_MULTICAST);
1313
1314 cmd.key_flags = key_flags;
1315 cmd.key_offset = keyconf->hw_key_idx;
1316 cmd.sta_id = sta_id;
1317
1318 status = ADD_STA_SUCCESS;
1319 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, sizeof(cmd),
1320 &cmd, &status);
1321
1322 switch (status) {
1323 case ADD_STA_SUCCESS:
1324 IWL_DEBUG_WEP(mvm, "MODIFY_STA: remove sta key passed\n");
1325 break;
1326 default:
1327 ret = -EIO;
1328 IWL_ERR(mvm, "MODIFY_STA: remove sta key failed\n");
1329 break;
1330 }
1331
1332 return ret;
1333 }
1334
1335 void iwl_mvm_update_tkip_key(struct iwl_mvm *mvm,
1336 struct ieee80211_vif *vif,
1337 struct ieee80211_key_conf *keyconf,
1338 struct ieee80211_sta *sta, u32 iv32,
1339 u16 *phase1key)
1340 {
1341 struct iwl_mvm_sta *mvm_sta;
1342 u8 sta_id = iwl_mvm_get_key_sta_id(vif, sta);
1343
1344 if (WARN_ON_ONCE(sta_id == IWL_MVM_STATION_COUNT))
1345 return;
1346
1347 rcu_read_lock();
1348
1349 if (!sta) {
1350 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
1351 if (WARN_ON(IS_ERR_OR_NULL(sta))) {
1352 rcu_read_unlock();
1353 return;
1354 }
1355 }
1356
1357 mvm_sta = (void *)sta->drv_priv;
1358 iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, sta_id,
1359 iv32, phase1key, CMD_ASYNC);
1360 rcu_read_unlock();
1361 }
1362
1363 void iwl_mvm_sta_modify_ps_wake(struct iwl_mvm *mvm,
1364 struct ieee80211_sta *sta)
1365 {
1366 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1367 struct iwl_mvm_add_sta_cmd cmd = {
1368 .add_modify = STA_MODE_MODIFY,
1369 .sta_id = mvmsta->sta_id,
1370 .station_flags_msk = cpu_to_le32(STA_FLG_PS),
1371 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
1372 };
1373 int ret;
1374
1375 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC, sizeof(cmd), &cmd);
1376 if (ret)
1377 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
1378 }
1379
1380 void iwl_mvm_sta_modify_sleep_tx_count(struct iwl_mvm *mvm,
1381 struct ieee80211_sta *sta,
1382 enum ieee80211_frame_release_type reason,
1383 u16 cnt, u16 tids, bool more_data,
1384 bool agg)
1385 {
1386 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1387 struct iwl_mvm_add_sta_cmd cmd = {
1388 .add_modify = STA_MODE_MODIFY,
1389 .sta_id = mvmsta->sta_id,
1390 .modify_mask = STA_MODIFY_SLEEPING_STA_TX_COUNT,
1391 .sleep_tx_count = cpu_to_le16(cnt),
1392 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
1393 };
1394 int tid, ret;
1395 unsigned long _tids = tids;
1396
1397 /* convert TIDs to ACs - we don't support TSPEC so that's OK
1398 * Note that this field is reserved and unused by firmware not
1399 * supporting GO uAPSD, so it's safe to always do this.
1400 */
1401 for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT)
1402 cmd.awake_acs |= BIT(tid_to_ucode_ac[tid]);
1403
1404 /* If we're releasing frames from aggregation queues then check if the
1405 * all queues combined that we're releasing frames from have
1406 * - more frames than the service period, in which case more_data
1407 * needs to be set
1408 * - fewer than 'cnt' frames, in which case we need to adjust the
1409 * firmware command (but do that unconditionally)
1410 */
1411 if (agg) {
1412 int remaining = cnt;
1413
1414 spin_lock_bh(&mvmsta->lock);
1415 for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT) {
1416 struct iwl_mvm_tid_data *tid_data;
1417 u16 n_queued;
1418
1419 tid_data = &mvmsta->tid_data[tid];
1420 if (WARN(tid_data->state != IWL_AGG_ON &&
1421 tid_data->state != IWL_EMPTYING_HW_QUEUE_DELBA,
1422 "TID %d state is %d\n",
1423 tid, tid_data->state)) {
1424 spin_unlock_bh(&mvmsta->lock);
1425 ieee80211_sta_eosp(sta);
1426 return;
1427 }
1428
1429 n_queued = iwl_mvm_tid_queued(tid_data);
1430 if (n_queued > remaining) {
1431 more_data = true;
1432 remaining = 0;
1433 break;
1434 }
1435 remaining -= n_queued;
1436 }
1437 spin_unlock_bh(&mvmsta->lock);
1438
1439 cmd.sleep_tx_count = cpu_to_le16(cnt - remaining);
1440 if (WARN_ON(cnt - remaining == 0)) {
1441 ieee80211_sta_eosp(sta);
1442 return;
1443 }
1444 }
1445
1446 /* Note: this is ignored by firmware not supporting GO uAPSD */
1447 if (more_data)
1448 cmd.sleep_state_flags |= cpu_to_le16(STA_SLEEP_STATE_MOREDATA);
1449
1450 if (reason == IEEE80211_FRAME_RELEASE_PSPOLL) {
1451 mvmsta->next_status_eosp = true;
1452 cmd.sleep_state_flags |= cpu_to_le16(STA_SLEEP_STATE_PS_POLL);
1453 } else {
1454 cmd.sleep_state_flags |= cpu_to_le16(STA_SLEEP_STATE_UAPSD);
1455 }
1456
1457 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC, sizeof(cmd), &cmd);
1458 if (ret)
1459 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
1460 }
1461
1462 int iwl_mvm_rx_eosp_notif(struct iwl_mvm *mvm,
1463 struct iwl_rx_cmd_buffer *rxb,
1464 struct iwl_device_cmd *cmd)
1465 {
1466 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1467 struct iwl_mvm_eosp_notification *notif = (void *)pkt->data;
1468 struct ieee80211_sta *sta;
1469 u32 sta_id = le32_to_cpu(notif->sta_id);
1470
1471 if (WARN_ON_ONCE(sta_id >= IWL_MVM_STATION_COUNT))
1472 return 0;
1473
1474 rcu_read_lock();
1475 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
1476 if (!IS_ERR_OR_NULL(sta))
1477 ieee80211_sta_eosp(sta);
1478 rcu_read_unlock();
1479
1480 return 0;
1481 }
1482
1483 void iwl_mvm_sta_modify_disable_tx(struct iwl_mvm *mvm,
1484 struct iwl_mvm_sta *mvmsta, bool disable)
1485 {
1486 struct iwl_mvm_add_sta_cmd cmd = {
1487 .add_modify = STA_MODE_MODIFY,
1488 .sta_id = mvmsta->sta_id,
1489 .station_flags = disable ? cpu_to_le32(STA_FLG_DISABLE_TX) : 0,
1490 .station_flags_msk = cpu_to_le32(STA_FLG_DISABLE_TX),
1491 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
1492 };
1493 int ret;
1494
1495 if (!(mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_DISABLE_STA_TX))
1496 return;
1497
1498 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC, sizeof(cmd), &cmd);
1499 if (ret)
1500 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
1501 }
1502
1503 void iwl_mvm_sta_modify_disable_tx_ap(struct iwl_mvm *mvm,
1504 struct ieee80211_sta *sta,
1505 bool disable)
1506 {
1507 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
1508
1509 spin_lock_bh(&mvm_sta->lock);
1510
1511 if (mvm_sta->disable_tx == disable) {
1512 spin_unlock_bh(&mvm_sta->lock);
1513 return;
1514 }
1515
1516 mvm_sta->disable_tx = disable;
1517
1518 /*
1519 * Tell mac80211 to start/stop queueing tx for this station,
1520 * but don't stop queueing if there are still pending frames
1521 * for this station.
1522 */
1523 if (disable || !atomic_read(&mvm->pending_frames[mvm_sta->sta_id]))
1524 ieee80211_sta_block_awake(mvm->hw, sta, disable);
1525
1526 iwl_mvm_sta_modify_disable_tx(mvm, mvm_sta, disable);
1527
1528 spin_unlock_bh(&mvm_sta->lock);
1529 }
1530
1531 void iwl_mvm_modify_all_sta_disable_tx(struct iwl_mvm *mvm,
1532 struct iwl_mvm_vif *mvmvif,
1533 bool disable)
1534 {
1535 struct ieee80211_sta *sta;
1536 struct iwl_mvm_sta *mvm_sta;
1537 int i;
1538
1539 lockdep_assert_held(&mvm->mutex);
1540
1541 /* Block/unblock all the stations of the given mvmvif */
1542 for (i = 0; i < IWL_MVM_STATION_COUNT; i++) {
1543 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[i],
1544 lockdep_is_held(&mvm->mutex));
1545 if (IS_ERR_OR_NULL(sta))
1546 continue;
1547
1548 mvm_sta = iwl_mvm_sta_from_mac80211(sta);
1549 if (mvm_sta->mac_id_n_color !=
1550 FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color))
1551 continue;
1552
1553 iwl_mvm_sta_modify_disable_tx_ap(mvm, sta, disable);
1554 }
1555 }
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