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Merge tag 'for-linus-20130301' of git://git.infradead.org/linux-mtd
[deliverable/linux.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 - 2013 Intel Corporation. All rights reserved.
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of version 2 of the GNU General Public License as
12 * published by the Free Software Foundation.
13 *
14 * This program is distributed in the hope that it will be useful, but
15 * WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
22 * USA
23 *
24 * The full GNU General Public License is included in this distribution
25 * in the file called LICENSE.GPL.
26 *
27 * Contact Information:
28 * Intel Linux Wireless <ilw@linux.intel.com>
29 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
30 *
31 * BSD LICENSE
32 *
33 * Copyright(c) 2012 - 2013 Intel Corporation. All rights reserved.
34 * All rights reserved.
35 *
36 * Redistribution and use in source and binary forms, with or without
37 * modification, are permitted provided that the following conditions
38 * are met:
39 *
40 * * Redistributions of source code must retain the above copyright
41 * notice, this list of conditions and the following disclaimer.
42 * * Redistributions in binary form must reproduce the above copyright
43 * notice, this list of conditions and the following disclaimer in
44 * the documentation and/or other materials provided with the
45 * distribution.
46 * * Neither the name Intel Corporation nor the names of its
47 * contributors may be used to endorse or promote products derived
48 * from this software without specific prior written permission.
49 *
50 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
51 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
52 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
53 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
54 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
55 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
56 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
57 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
58 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
59 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
60 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
61 *
62 *****************************************************************************/
63 #include <net/mac80211.h>
64
65 #include "mvm.h"
66 #include "sta.h"
67
68 static int iwl_mvm_find_free_sta_id(struct iwl_mvm *mvm)
69 {
70 int sta_id;
71
72 WARN_ON_ONCE(test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status));
73
74 lockdep_assert_held(&mvm->mutex);
75
76 /* Don't take rcu_read_lock() since we are protected by mvm->mutex */
77 for (sta_id = 0; sta_id < IWL_MVM_STATION_COUNT; sta_id++)
78 if (!rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
79 lockdep_is_held(&mvm->mutex)))
80 return sta_id;
81 return IWL_MVM_STATION_COUNT;
82 }
83
84 /* send station add/update command to firmware */
85 int iwl_mvm_sta_send_to_fw(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
86 bool update)
87 {
88 struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv;
89 struct iwl_mvm_add_sta_cmd add_sta_cmd;
90 int ret;
91 u32 status;
92 u32 agg_size = 0, mpdu_dens = 0;
93
94 memset(&add_sta_cmd, 0, sizeof(add_sta_cmd));
95
96 add_sta_cmd.sta_id = mvm_sta->sta_id;
97 add_sta_cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color);
98 if (!update) {
99 add_sta_cmd.tfd_queue_msk = cpu_to_le32(mvm_sta->tfd_queue_msk);
100 memcpy(&add_sta_cmd.addr, sta->addr, ETH_ALEN);
101 }
102 add_sta_cmd.add_modify = update ? 1 : 0;
103
104 /* STA_FLG_FAT_EN_MSK ? */
105 /* STA_FLG_MIMO_EN_MSK ? */
106
107 if (sta->ht_cap.ht_supported) {
108 add_sta_cmd.station_flags_msk |=
109 cpu_to_le32(STA_FLG_MAX_AGG_SIZE_MSK |
110 STA_FLG_AGG_MPDU_DENS_MSK);
111
112 mpdu_dens = sta->ht_cap.ampdu_density;
113 }
114
115 if (sta->vht_cap.vht_supported) {
116 agg_size = sta->vht_cap.cap &
117 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK;
118 agg_size >>=
119 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_SHIFT;
120 } else if (sta->ht_cap.ht_supported) {
121 agg_size = sta->ht_cap.ampdu_factor;
122 }
123
124 add_sta_cmd.station_flags |=
125 cpu_to_le32(agg_size << STA_FLG_MAX_AGG_SIZE_SHIFT);
126 add_sta_cmd.station_flags |=
127 cpu_to_le32(mpdu_dens << STA_FLG_AGG_MPDU_DENS_SHIFT);
128
129 status = ADD_STA_SUCCESS;
130 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, sizeof(add_sta_cmd),
131 &add_sta_cmd, &status);
132 if (ret)
133 return ret;
134
135 switch (status) {
136 case ADD_STA_SUCCESS:
137 IWL_DEBUG_ASSOC(mvm, "ADD_STA PASSED\n");
138 break;
139 default:
140 ret = -EIO;
141 IWL_ERR(mvm, "ADD_STA failed\n");
142 break;
143 }
144
145 return ret;
146 }
147
148 int iwl_mvm_add_sta(struct iwl_mvm *mvm,
149 struct ieee80211_vif *vif,
150 struct ieee80211_sta *sta)
151 {
152 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
153 struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv;
154 int i, ret, sta_id;
155
156 lockdep_assert_held(&mvm->mutex);
157
158 if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
159 sta_id = iwl_mvm_find_free_sta_id(mvm);
160 else
161 sta_id = mvm_sta->sta_id;
162
163 if (WARN_ON_ONCE(sta_id == IWL_MVM_STATION_COUNT))
164 return -ENOSPC;
165
166 spin_lock_init(&mvm_sta->lock);
167
168 mvm_sta->sta_id = sta_id;
169 mvm_sta->mac_id_n_color = FW_CMD_ID_AND_COLOR(mvmvif->id,
170 mvmvif->color);
171 mvm_sta->vif = vif;
172 mvm_sta->max_agg_bufsize = LINK_QUAL_AGG_FRAME_LIMIT_DEF;
173
174 /* HW restart, don't assume the memory has been zeroed */
175 atomic_set(&mvm_sta->pending_frames, 0);
176 mvm_sta->tid_disable_agg = 0;
177 mvm_sta->tfd_queue_msk = 0;
178 for (i = 0; i < IEEE80211_NUM_ACS; i++)
179 if (vif->hw_queue[i] != IEEE80211_INVAL_HW_QUEUE)
180 mvm_sta->tfd_queue_msk |= BIT(vif->hw_queue[i]);
181
182 if (vif->cab_queue != IEEE80211_INVAL_HW_QUEUE)
183 mvm_sta->tfd_queue_msk |= BIT(vif->cab_queue);
184
185 /* for HW restart - need to reset the seq_number etc... */
186 memset(mvm_sta->tid_data, 0, sizeof(mvm_sta->tid_data));
187
188 ret = iwl_mvm_sta_send_to_fw(mvm, sta, false);
189 if (ret)
190 return ret;
191
192 /* The first station added is the AP, the others are TDLS STAs */
193 if (vif->type == NL80211_IFTYPE_STATION &&
194 mvmvif->ap_sta_id == IWL_MVM_STATION_COUNT)
195 mvmvif->ap_sta_id = sta_id;
196
197 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta_id], sta);
198
199 return 0;
200 }
201
202 int iwl_mvm_update_sta(struct iwl_mvm *mvm,
203 struct ieee80211_vif *vif,
204 struct ieee80211_sta *sta)
205 {
206 return iwl_mvm_sta_send_to_fw(mvm, sta, true);
207 }
208
209 int iwl_mvm_drain_sta(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta,
210 bool drain)
211 {
212 struct iwl_mvm_add_sta_cmd cmd = {};
213 int ret;
214 u32 status;
215
216 lockdep_assert_held(&mvm->mutex);
217
218 cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color);
219 cmd.sta_id = mvmsta->sta_id;
220 cmd.add_modify = STA_MODE_MODIFY;
221 cmd.station_flags = drain ? cpu_to_le32(STA_FLG_DRAIN_FLOW) : 0;
222 cmd.station_flags_msk = cpu_to_le32(STA_FLG_DRAIN_FLOW);
223
224 status = ADD_STA_SUCCESS;
225 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, sizeof(cmd),
226 &cmd, &status);
227 if (ret)
228 return ret;
229
230 switch (status) {
231 case ADD_STA_SUCCESS:
232 IWL_DEBUG_INFO(mvm, "Frames for staid %d will drained in fw\n",
233 mvmsta->sta_id);
234 break;
235 default:
236 ret = -EIO;
237 IWL_ERR(mvm, "Couldn't drain frames for staid %d\n",
238 mvmsta->sta_id);
239 break;
240 }
241
242 return ret;
243 }
244
245 /*
246 * Remove a station from the FW table. Before sending the command to remove
247 * the station validate that the station is indeed known to the driver (sanity
248 * only).
249 */
250 static int iwl_mvm_rm_sta_common(struct iwl_mvm *mvm, u8 sta_id)
251 {
252 struct ieee80211_sta *sta;
253 struct iwl_mvm_rm_sta_cmd rm_sta_cmd = {
254 .sta_id = sta_id,
255 };
256 int ret;
257
258 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
259 lockdep_is_held(&mvm->mutex));
260
261 /* Note: internal stations are marked as error values */
262 if (!sta) {
263 IWL_ERR(mvm, "Invalid station id\n");
264 return -EINVAL;
265 }
266
267 ret = iwl_mvm_send_cmd_pdu(mvm, REMOVE_STA, CMD_SYNC,
268 sizeof(rm_sta_cmd), &rm_sta_cmd);
269 if (ret) {
270 IWL_ERR(mvm, "Failed to remove station. Id=%d\n", sta_id);
271 return ret;
272 }
273
274 return 0;
275 }
276
277 void iwl_mvm_sta_drained_wk(struct work_struct *wk)
278 {
279 struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm, sta_drained_wk);
280 u8 sta_id;
281
282 /*
283 * The mutex is needed because of the SYNC cmd, but not only: if the
284 * work would run concurrently with iwl_mvm_rm_sta, it would run before
285 * iwl_mvm_rm_sta sets the station as busy, and exit. Then
286 * iwl_mvm_rm_sta would set the station as busy, and nobody will clean
287 * that later.
288 */
289 mutex_lock(&mvm->mutex);
290
291 for_each_set_bit(sta_id, mvm->sta_drained, IWL_MVM_STATION_COUNT) {
292 int ret;
293 struct ieee80211_sta *sta =
294 rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
295 lockdep_is_held(&mvm->mutex));
296
297 /* This station is in use */
298 if (!IS_ERR(sta))
299 continue;
300
301 if (PTR_ERR(sta) == -EINVAL) {
302 IWL_ERR(mvm, "Drained sta %d, but it is internal?\n",
303 sta_id);
304 continue;
305 }
306
307 if (!sta) {
308 IWL_ERR(mvm, "Drained sta %d, but it was NULL?\n",
309 sta_id);
310 continue;
311 }
312
313 WARN_ON(PTR_ERR(sta) != -EBUSY);
314 /* This station was removed and we waited until it got drained,
315 * we can now proceed and remove it.
316 */
317 ret = iwl_mvm_rm_sta_common(mvm, sta_id);
318 if (ret) {
319 IWL_ERR(mvm,
320 "Couldn't remove sta %d after it was drained\n",
321 sta_id);
322 continue;
323 }
324 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta_id], NULL);
325 clear_bit(sta_id, mvm->sta_drained);
326 }
327
328 mutex_unlock(&mvm->mutex);
329 }
330
331 int iwl_mvm_rm_sta(struct iwl_mvm *mvm,
332 struct ieee80211_vif *vif,
333 struct ieee80211_sta *sta)
334 {
335 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
336 struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv;
337 int ret;
338
339 lockdep_assert_held(&mvm->mutex);
340
341 if (vif->type == NL80211_IFTYPE_STATION &&
342 mvmvif->ap_sta_id == mvm_sta->sta_id) {
343 /*
344 * Put a non-NULL since the fw station isn't removed.
345 * It will be removed after the MAC will be set as
346 * unassoc.
347 */
348 rcu_assign_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id],
349 ERR_PTR(-EINVAL));
350
351 /* flush its queues here since we are freeing mvm_sta */
352 ret = iwl_mvm_flush_tx_path(mvm, mvm_sta->tfd_queue_msk, true);
353
354 /* if we are associated - we can't remove the AP STA now */
355 if (vif->bss_conf.assoc)
356 return ret;
357
358 /* unassoc - go ahead - remove the AP STA now */
359 mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
360 }
361
362 /*
363 * There are frames pending on the AC queues for this station.
364 * We need to wait until all the frames are drained...
365 */
366 if (atomic_read(&mvm_sta->pending_frames)) {
367 ret = iwl_mvm_drain_sta(mvm, mvm_sta, true);
368 rcu_assign_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id],
369 ERR_PTR(-EBUSY));
370 } else {
371 ret = iwl_mvm_rm_sta_common(mvm, mvm_sta->sta_id);
372 rcu_assign_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id], NULL);
373 }
374
375 return ret;
376 }
377
378 int iwl_mvm_rm_sta_id(struct iwl_mvm *mvm,
379 struct ieee80211_vif *vif,
380 u8 sta_id)
381 {
382 int ret = iwl_mvm_rm_sta_common(mvm, sta_id);
383
384 lockdep_assert_held(&mvm->mutex);
385
386 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta_id], NULL);
387 return ret;
388 }
389
390 int iwl_mvm_allocate_int_sta(struct iwl_mvm *mvm, struct iwl_mvm_int_sta *sta,
391 u32 qmask)
392 {
393 if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
394 sta->sta_id = iwl_mvm_find_free_sta_id(mvm);
395 if (WARN_ON_ONCE(sta->sta_id == IWL_MVM_STATION_COUNT))
396 return -ENOSPC;
397 }
398
399 sta->tfd_queue_msk = qmask;
400
401 /* put a non-NULL value so iterating over the stations won't stop */
402 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta->sta_id], ERR_PTR(-EINVAL));
403 return 0;
404 }
405
406 void iwl_mvm_dealloc_int_sta(struct iwl_mvm *mvm, struct iwl_mvm_int_sta *sta)
407 {
408 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta->sta_id], NULL);
409 memset(sta, 0, sizeof(struct iwl_mvm_int_sta));
410 sta->sta_id = IWL_MVM_STATION_COUNT;
411 }
412
413 static int iwl_mvm_add_int_sta_common(struct iwl_mvm *mvm,
414 struct iwl_mvm_int_sta *sta,
415 const u8 *addr,
416 u16 mac_id, u16 color)
417 {
418 struct iwl_mvm_add_sta_cmd cmd;
419 int ret;
420 u32 status;
421
422 lockdep_assert_held(&mvm->mutex);
423
424 memset(&cmd, 0, sizeof(struct iwl_mvm_add_sta_cmd));
425 cmd.sta_id = sta->sta_id;
426 cmd.mac_id_n_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(mac_id,
427 color));
428
429 cmd.tfd_queue_msk = cpu_to_le32(sta->tfd_queue_msk);
430
431 if (addr)
432 memcpy(cmd.addr, addr, ETH_ALEN);
433
434 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, sizeof(cmd),
435 &cmd, &status);
436 if (ret)
437 return ret;
438
439 switch (status) {
440 case ADD_STA_SUCCESS:
441 IWL_DEBUG_INFO(mvm, "Internal station added.\n");
442 return 0;
443 default:
444 ret = -EIO;
445 IWL_ERR(mvm, "Add internal station failed, status=0x%x\n",
446 status);
447 break;
448 }
449 return ret;
450 }
451
452 int iwl_mvm_add_aux_sta(struct iwl_mvm *mvm)
453 {
454 int ret;
455
456 lockdep_assert_held(&mvm->mutex);
457
458 /* Add the aux station, but without any queues */
459 ret = iwl_mvm_allocate_int_sta(mvm, &mvm->aux_sta, 0);
460 if (ret)
461 return ret;
462
463 ret = iwl_mvm_add_int_sta_common(mvm, &mvm->aux_sta, NULL,
464 MAC_INDEX_AUX, 0);
465
466 if (ret)
467 iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta);
468 return ret;
469 }
470
471 /*
472 * Send the add station command for the vif's broadcast station.
473 * Assumes that the station was already allocated.
474 *
475 * @mvm: the mvm component
476 * @vif: the interface to which the broadcast station is added
477 * @bsta: the broadcast station to add.
478 */
479 int iwl_mvm_send_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
480 struct iwl_mvm_int_sta *bsta)
481 {
482 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
483 static const u8 baddr[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
484
485 lockdep_assert_held(&mvm->mutex);
486
487 if (WARN_ON_ONCE(bsta->sta_id == IWL_MVM_STATION_COUNT))
488 return -ENOSPC;
489
490 return iwl_mvm_add_int_sta_common(mvm, bsta, baddr,
491 mvmvif->id, mvmvif->color);
492 }
493
494 /* Send the FW a request to remove the station from it's internal data
495 * structures, but DO NOT remove the entry from the local data structures. */
496 int iwl_mvm_send_rm_bcast_sta(struct iwl_mvm *mvm,
497 struct iwl_mvm_int_sta *bsta)
498 {
499 int ret;
500
501 lockdep_assert_held(&mvm->mutex);
502
503 ret = iwl_mvm_rm_sta_common(mvm, bsta->sta_id);
504 if (ret)
505 IWL_WARN(mvm, "Failed sending remove station\n");
506 return ret;
507 }
508
509 /* Allocate a new station entry for the broadcast station to the given vif,
510 * and send it to the FW.
511 * Note that each P2P mac should have its own broadcast station.
512 *
513 * @mvm: the mvm component
514 * @vif: the interface to which the broadcast station is added
515 * @bsta: the broadcast station to add. */
516 int iwl_mvm_add_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
517 struct iwl_mvm_int_sta *bsta)
518 {
519 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
520 static const u8 baddr[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
521 u32 qmask;
522 int ret;
523
524 lockdep_assert_held(&mvm->mutex);
525
526 qmask = iwl_mvm_mac_get_queues_mask(mvm, vif);
527 ret = iwl_mvm_allocate_int_sta(mvm, bsta, qmask);
528 if (ret)
529 return ret;
530
531 ret = iwl_mvm_add_int_sta_common(mvm, bsta, baddr,
532 mvmvif->id, mvmvif->color);
533
534 if (ret)
535 iwl_mvm_dealloc_int_sta(mvm, bsta);
536 return ret;
537 }
538
539 /*
540 * Send the FW a request to remove the station from it's internal data
541 * structures, and in addition remove it from the local data structure.
542 */
543 int iwl_mvm_rm_bcast_sta(struct iwl_mvm *mvm, struct iwl_mvm_int_sta *bsta)
544 {
545 int ret;
546
547 lockdep_assert_held(&mvm->mutex);
548
549 ret = iwl_mvm_rm_sta_common(mvm, bsta->sta_id);
550 if (ret)
551 return ret;
552
553 iwl_mvm_dealloc_int_sta(mvm, bsta);
554 return ret;
555 }
556
557 int iwl_mvm_sta_rx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
558 int tid, u16 ssn, bool start)
559 {
560 struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv;
561 struct iwl_mvm_add_sta_cmd cmd = {};
562 int ret;
563 u32 status;
564
565 lockdep_assert_held(&mvm->mutex);
566
567 cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color);
568 cmd.sta_id = mvm_sta->sta_id;
569 cmd.add_modify = STA_MODE_MODIFY;
570 cmd.add_immediate_ba_tid = (u8) tid;
571 cmd.add_immediate_ba_ssn = cpu_to_le16(ssn);
572 cmd.modify_mask = start ? STA_MODIFY_ADD_BA_TID :
573 STA_MODIFY_REMOVE_BA_TID;
574
575 status = ADD_STA_SUCCESS;
576 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, sizeof(cmd),
577 &cmd, &status);
578 if (ret)
579 return ret;
580
581 switch (status) {
582 case ADD_STA_SUCCESS:
583 IWL_DEBUG_INFO(mvm, "RX BA Session %sed in fw\n",
584 start ? "start" : "stopp");
585 break;
586 case ADD_STA_IMMEDIATE_BA_FAILURE:
587 IWL_WARN(mvm, "RX BA Session refused by fw\n");
588 ret = -ENOSPC;
589 break;
590 default:
591 ret = -EIO;
592 IWL_ERR(mvm, "RX BA Session failed %sing, status 0x%x\n",
593 start ? "start" : "stopp", status);
594 break;
595 }
596
597 return ret;
598 }
599
600 static int iwl_mvm_sta_tx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
601 int tid, u8 queue, bool start)
602 {
603 struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv;
604 struct iwl_mvm_add_sta_cmd cmd = {};
605 int ret;
606 u32 status;
607
608 lockdep_assert_held(&mvm->mutex);
609
610 if (start) {
611 mvm_sta->tfd_queue_msk |= BIT(queue);
612 mvm_sta->tid_disable_agg &= ~BIT(tid);
613 } else {
614 mvm_sta->tfd_queue_msk &= ~BIT(queue);
615 mvm_sta->tid_disable_agg |= BIT(tid);
616 }
617
618 cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color);
619 cmd.sta_id = mvm_sta->sta_id;
620 cmd.add_modify = STA_MODE_MODIFY;
621 cmd.modify_mask = STA_MODIFY_QUEUES | STA_MODIFY_TID_DISABLE_TX;
622 cmd.tfd_queue_msk = cpu_to_le32(mvm_sta->tfd_queue_msk);
623 cmd.tid_disable_tx = cpu_to_le16(mvm_sta->tid_disable_agg);
624
625 status = ADD_STA_SUCCESS;
626 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, sizeof(cmd),
627 &cmd, &status);
628 if (ret)
629 return ret;
630
631 switch (status) {
632 case ADD_STA_SUCCESS:
633 break;
634 default:
635 ret = -EIO;
636 IWL_ERR(mvm, "TX BA Session failed %sing, status 0x%x\n",
637 start ? "start" : "stopp", status);
638 break;
639 }
640
641 return ret;
642 }
643
644 static const u8 tid_to_ac[] = {
645 IEEE80211_AC_BE,
646 IEEE80211_AC_BK,
647 IEEE80211_AC_BK,
648 IEEE80211_AC_BE,
649 IEEE80211_AC_VI,
650 IEEE80211_AC_VI,
651 IEEE80211_AC_VO,
652 IEEE80211_AC_VO,
653 };
654
655 int iwl_mvm_sta_tx_agg_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
656 struct ieee80211_sta *sta, u16 tid, u16 *ssn)
657 {
658 struct iwl_mvm_sta *mvmsta = (void *)sta->drv_priv;
659 struct iwl_mvm_tid_data *tid_data;
660 int txq_id;
661
662 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
663 return -EINVAL;
664
665 if (mvmsta->tid_data[tid].state != IWL_AGG_OFF) {
666 IWL_ERR(mvm, "Start AGG when state is not IWL_AGG_OFF %d!\n",
667 mvmsta->tid_data[tid].state);
668 return -ENXIO;
669 }
670
671 lockdep_assert_held(&mvm->mutex);
672
673 for (txq_id = IWL_MVM_FIRST_AGG_QUEUE;
674 txq_id <= IWL_MVM_LAST_AGG_QUEUE; txq_id++)
675 if (mvm->queue_to_mac80211[txq_id] ==
676 IWL_INVALID_MAC80211_QUEUE)
677 break;
678
679 if (txq_id > IWL_MVM_LAST_AGG_QUEUE) {
680 IWL_ERR(mvm, "Failed to allocate agg queue\n");
681 return -EIO;
682 }
683
684 /* the new tx queue is still connected to the same mac80211 queue */
685 mvm->queue_to_mac80211[txq_id] = vif->hw_queue[tid_to_ac[tid]];
686
687 spin_lock_bh(&mvmsta->lock);
688 tid_data = &mvmsta->tid_data[tid];
689 tid_data->ssn = SEQ_TO_SN(tid_data->seq_number);
690 tid_data->txq_id = txq_id;
691 *ssn = tid_data->ssn;
692
693 IWL_DEBUG_TX_QUEUES(mvm,
694 "Start AGG: sta %d tid %d queue %d - ssn = %d, next_recl = %d\n",
695 mvmsta->sta_id, tid, txq_id, tid_data->ssn,
696 tid_data->next_reclaimed);
697
698 if (tid_data->ssn == tid_data->next_reclaimed) {
699 tid_data->state = IWL_AGG_STARTING;
700 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
701 } else {
702 tid_data->state = IWL_EMPTYING_HW_QUEUE_ADDBA;
703 }
704
705 spin_unlock_bh(&mvmsta->lock);
706
707 return 0;
708 }
709
710 int iwl_mvm_sta_tx_agg_oper(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
711 struct ieee80211_sta *sta, u16 tid, u8 buf_size)
712 {
713 struct iwl_mvm_sta *mvmsta = (void *)sta->drv_priv;
714 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
715 int queue, fifo, ret;
716 u16 ssn;
717
718 buf_size = min_t(int, buf_size, LINK_QUAL_AGG_FRAME_LIMIT_DEF);
719
720 spin_lock_bh(&mvmsta->lock);
721 ssn = tid_data->ssn;
722 queue = tid_data->txq_id;
723 tid_data->state = IWL_AGG_ON;
724 tid_data->ssn = 0xffff;
725 spin_unlock_bh(&mvmsta->lock);
726
727 fifo = iwl_mvm_ac_to_tx_fifo[tid_to_ac[tid]];
728
729 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true);
730 if (ret)
731 return -EIO;
732
733 iwl_trans_txq_enable(mvm->trans, queue, fifo, mvmsta->sta_id, tid,
734 buf_size, ssn);
735
736 /*
737 * Even though in theory the peer could have different
738 * aggregation reorder buffer sizes for different sessions,
739 * our ucode doesn't allow for that and has a global limit
740 * for each station. Therefore, use the minimum of all the
741 * aggregation sessions and our default value.
742 */
743 mvmsta->max_agg_bufsize =
744 min(mvmsta->max_agg_bufsize, buf_size);
745 mvmsta->lq_sta.lq.agg_frame_cnt_limit = mvmsta->max_agg_bufsize;
746
747 if (mvm->cfg->ht_params->use_rts_for_aggregation) {
748 /*
749 * switch to RTS/CTS if it is the prefer protection
750 * method for HT traffic
751 */
752 mvmsta->lq_sta.lq.flags |= LQ_FLAG_SET_STA_TLC_RTS_MSK;
753 /*
754 * TODO: remove the TLC_RTS flag when we tear down the last
755 * AGG session (agg_tids_count in DVM)
756 */
757 }
758
759 IWL_DEBUG_HT(mvm, "Tx aggregation enabled on ra = %pM tid = %d\n",
760 sta->addr, tid);
761
762 return iwl_mvm_send_lq_cmd(mvm, &mvmsta->lq_sta.lq, CMD_ASYNC, false);
763 }
764
765 int iwl_mvm_sta_tx_agg_stop(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
766 struct ieee80211_sta *sta, u16 tid)
767 {
768 struct iwl_mvm_sta *mvmsta = (void *)sta->drv_priv;
769 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
770 u16 txq_id;
771 int err;
772
773 spin_lock_bh(&mvmsta->lock);
774
775 txq_id = tid_data->txq_id;
776
777 IWL_DEBUG_TX_QUEUES(mvm, "Stop AGG: sta %d tid %d q %d state %d\n",
778 mvmsta->sta_id, tid, txq_id, tid_data->state);
779
780 switch (tid_data->state) {
781 case IWL_AGG_ON:
782 tid_data->ssn = SEQ_TO_SN(tid_data->seq_number);
783
784 IWL_DEBUG_TX_QUEUES(mvm,
785 "ssn = %d, next_recl = %d\n",
786 tid_data->ssn, tid_data->next_reclaimed);
787
788 /* There are still packets for this RA / TID in the HW */
789 if (tid_data->ssn != tid_data->next_reclaimed) {
790 tid_data->state = IWL_EMPTYING_HW_QUEUE_DELBA;
791 err = 0;
792 break;
793 }
794
795 tid_data->ssn = 0xffff;
796 iwl_trans_txq_disable(mvm->trans, txq_id);
797 /* fall through */
798 case IWL_AGG_STARTING:
799 case IWL_EMPTYING_HW_QUEUE_ADDBA:
800 /*
801 * The agg session has been stopped before it was set up. This
802 * can happen when the AddBA timer times out for example.
803 */
804
805 /* No barriers since we are under mutex */
806 lockdep_assert_held(&mvm->mutex);
807 mvm->queue_to_mac80211[txq_id] = IWL_INVALID_MAC80211_QUEUE;
808
809 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
810 tid_data->state = IWL_AGG_OFF;
811 err = 0;
812 break;
813 default:
814 IWL_ERR(mvm,
815 "Stopping AGG while state not ON or starting for %d on %d (%d)\n",
816 mvmsta->sta_id, tid, tid_data->state);
817 IWL_ERR(mvm,
818 "\ttid_data->txq_id = %d\n", tid_data->txq_id);
819 err = -EINVAL;
820 }
821
822 spin_unlock_bh(&mvmsta->lock);
823
824 return err;
825 }
826
827 static int iwl_mvm_set_fw_key_idx(struct iwl_mvm *mvm)
828 {
829 int i;
830
831 lockdep_assert_held(&mvm->mutex);
832
833 i = find_first_zero_bit(mvm->fw_key_table, STA_KEY_MAX_NUM);
834
835 if (i == STA_KEY_MAX_NUM)
836 return STA_KEY_IDX_INVALID;
837
838 __set_bit(i, mvm->fw_key_table);
839
840 return i;
841 }
842
843 static u8 iwl_mvm_get_key_sta_id(struct ieee80211_vif *vif,
844 struct ieee80211_sta *sta)
845 {
846 struct iwl_mvm_vif *mvmvif = (void *)vif->drv_priv;
847
848 if (sta) {
849 struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv;
850
851 return mvm_sta->sta_id;
852 }
853
854 /*
855 * The device expects GTKs for station interfaces to be
856 * installed as GTKs for the AP station. If we have no
857 * station ID, then use AP's station ID.
858 */
859 if (vif->type == NL80211_IFTYPE_STATION &&
860 mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT)
861 return mvmvif->ap_sta_id;
862
863 return IWL_INVALID_STATION;
864 }
865
866 static int iwl_mvm_send_sta_key(struct iwl_mvm *mvm,
867 struct iwl_mvm_sta *mvm_sta,
868 struct ieee80211_key_conf *keyconf,
869 u8 sta_id, u32 tkip_iv32, u16 *tkip_p1k,
870 u32 cmd_flags)
871 {
872 __le16 key_flags;
873 struct iwl_mvm_add_sta_cmd cmd = {};
874 int ret, status;
875 u16 keyidx;
876 int i;
877
878 keyidx = (keyconf->keyidx << STA_KEY_FLG_KEYID_POS) &
879 STA_KEY_FLG_KEYID_MSK;
880 key_flags = cpu_to_le16(keyidx);
881 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_KEY_MAP);
882
883 switch (keyconf->cipher) {
884 case WLAN_CIPHER_SUITE_TKIP:
885 key_flags |= cpu_to_le16(STA_KEY_FLG_TKIP);
886 cmd.key.tkip_rx_tsc_byte2 = tkip_iv32;
887 for (i = 0; i < 5; i++)
888 cmd.key.tkip_rx_ttak[i] = cpu_to_le16(tkip_p1k[i]);
889 memcpy(cmd.key.key, keyconf->key, keyconf->keylen);
890 break;
891 case WLAN_CIPHER_SUITE_CCMP:
892 key_flags |= cpu_to_le16(STA_KEY_FLG_CCM);
893 memcpy(cmd.key.key, keyconf->key, keyconf->keylen);
894 break;
895 default:
896 WARN_ON(1);
897 return -EINVAL;
898 }
899
900 if (!(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE))
901 key_flags |= cpu_to_le16(STA_KEY_MULTICAST);
902
903 cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color);
904 cmd.key.key_offset = keyconf->hw_key_idx;
905 cmd.key.key_flags = key_flags;
906 cmd.add_modify = STA_MODE_MODIFY;
907 cmd.modify_mask = STA_MODIFY_KEY;
908 cmd.sta_id = sta_id;
909
910 status = ADD_STA_SUCCESS;
911 if (cmd_flags == CMD_SYNC)
912 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, sizeof(cmd),
913 &cmd, &status);
914 else
915 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC,
916 sizeof(cmd), &cmd);
917
918 switch (status) {
919 case ADD_STA_SUCCESS:
920 IWL_DEBUG_WEP(mvm, "MODIFY_STA: set dynamic key passed\n");
921 break;
922 default:
923 ret = -EIO;
924 IWL_ERR(mvm, "MODIFY_STA: set dynamic key failed\n");
925 break;
926 }
927
928 return ret;
929 }
930
931 static int iwl_mvm_send_sta_igtk(struct iwl_mvm *mvm,
932 struct ieee80211_key_conf *keyconf,
933 u8 sta_id, bool remove_key)
934 {
935 struct iwl_mvm_mgmt_mcast_key_cmd igtk_cmd = {};
936
937 /* verify the key details match the required command's expectations */
938 if (WARN_ON((keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC) ||
939 (keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE) ||
940 (keyconf->keyidx != 4 && keyconf->keyidx != 5)))
941 return -EINVAL;
942
943 igtk_cmd.key_id = cpu_to_le32(keyconf->keyidx);
944 igtk_cmd.sta_id = cpu_to_le32(sta_id);
945
946 if (remove_key) {
947 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_NOT_VALID);
948 } else {
949 struct ieee80211_key_seq seq;
950 const u8 *pn;
951
952 memcpy(igtk_cmd.IGTK, keyconf->key, keyconf->keylen);
953 ieee80211_aes_cmac_calculate_k1_k2(keyconf,
954 igtk_cmd.K1, igtk_cmd.K2);
955 ieee80211_get_key_rx_seq(keyconf, 0, &seq);
956 pn = seq.aes_cmac.pn;
957 igtk_cmd.receive_seq_cnt = cpu_to_le64(((u64) pn[5] << 0) |
958 ((u64) pn[4] << 8) |
959 ((u64) pn[3] << 16) |
960 ((u64) pn[2] << 24) |
961 ((u64) pn[1] << 32) |
962 ((u64) pn[0] << 40));
963 }
964
965 IWL_DEBUG_INFO(mvm, "%s igtk for sta %u\n",
966 remove_key ? "removing" : "installing",
967 igtk_cmd.sta_id);
968
969 return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, CMD_SYNC,
970 sizeof(igtk_cmd), &igtk_cmd);
971 }
972
973
974 static inline u8 *iwl_mvm_get_mac_addr(struct iwl_mvm *mvm,
975 struct ieee80211_vif *vif,
976 struct ieee80211_sta *sta)
977 {
978 struct iwl_mvm_vif *mvmvif = (void *)vif->drv_priv;
979
980 if (sta)
981 return sta->addr;
982
983 if (vif->type == NL80211_IFTYPE_STATION &&
984 mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT) {
985 u8 sta_id = mvmvif->ap_sta_id;
986 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
987 lockdep_is_held(&mvm->mutex));
988 return sta->addr;
989 }
990
991
992 return NULL;
993 }
994
995 int iwl_mvm_set_sta_key(struct iwl_mvm *mvm,
996 struct ieee80211_vif *vif,
997 struct ieee80211_sta *sta,
998 struct ieee80211_key_conf *keyconf,
999 bool have_key_offset)
1000 {
1001 struct iwl_mvm_sta *mvm_sta;
1002 int ret;
1003 u8 *addr, sta_id;
1004 struct ieee80211_key_seq seq;
1005 u16 p1k[5];
1006
1007 lockdep_assert_held(&mvm->mutex);
1008
1009 /* Get the station id from the mvm local station table */
1010 sta_id = iwl_mvm_get_key_sta_id(vif, sta);
1011 if (sta_id == IWL_INVALID_STATION) {
1012 IWL_ERR(mvm, "Failed to find station id\n");
1013 return -EINVAL;
1014 }
1015
1016 if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC) {
1017 ret = iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, false);
1018 goto end;
1019 }
1020
1021 /*
1022 * It is possible that the 'sta' parameter is NULL, and thus
1023 * there is a need to retrieve the sta from the local station table.
1024 */
1025 if (!sta) {
1026 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
1027 lockdep_is_held(&mvm->mutex));
1028 if (IS_ERR_OR_NULL(sta)) {
1029 IWL_ERR(mvm, "Invalid station id\n");
1030 return -EINVAL;
1031 }
1032 }
1033
1034 mvm_sta = (struct iwl_mvm_sta *)sta->drv_priv;
1035 if (WARN_ON_ONCE(mvm_sta->vif != vif))
1036 return -EINVAL;
1037
1038 if (!have_key_offset) {
1039 /*
1040 * The D3 firmware hardcodes the PTK offset to 0, so we have to
1041 * configure it there. As a result, this workaround exists to
1042 * let the caller set the key offset (hw_key_idx), see d3.c.
1043 */
1044 keyconf->hw_key_idx = iwl_mvm_set_fw_key_idx(mvm);
1045 if (keyconf->hw_key_idx == STA_KEY_IDX_INVALID)
1046 return -ENOSPC;
1047 }
1048
1049 switch (keyconf->cipher) {
1050 case WLAN_CIPHER_SUITE_TKIP:
1051 addr = iwl_mvm_get_mac_addr(mvm, vif, sta);
1052 /* get phase 1 key from mac80211 */
1053 ieee80211_get_key_rx_seq(keyconf, 0, &seq);
1054 ieee80211_get_tkip_rx_p1k(keyconf, addr, seq.tkip.iv32, p1k);
1055 ret = iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, sta_id,
1056 seq.tkip.iv32, p1k, CMD_SYNC);
1057 break;
1058 case WLAN_CIPHER_SUITE_CCMP:
1059 ret = iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, sta_id,
1060 0, NULL, CMD_SYNC);
1061 break;
1062 default:
1063 IWL_ERR(mvm, "Unknown cipher %x\n", keyconf->cipher);
1064 ret = -EINVAL;
1065 }
1066
1067 if (ret)
1068 __clear_bit(keyconf->hw_key_idx, mvm->fw_key_table);
1069
1070 end:
1071 IWL_DEBUG_WEP(mvm, "key: cipher=%x len=%d idx=%d sta=%pM ret=%d\n",
1072 keyconf->cipher, keyconf->keylen, keyconf->keyidx,
1073 sta->addr, ret);
1074 return ret;
1075 }
1076
1077 int iwl_mvm_remove_sta_key(struct iwl_mvm *mvm,
1078 struct ieee80211_vif *vif,
1079 struct ieee80211_sta *sta,
1080 struct ieee80211_key_conf *keyconf)
1081 {
1082 struct iwl_mvm_sta *mvm_sta;
1083 struct iwl_mvm_add_sta_cmd cmd = {};
1084 __le16 key_flags;
1085 int ret, status;
1086 u8 sta_id;
1087
1088 lockdep_assert_held(&mvm->mutex);
1089
1090 /* Get the station id from the mvm local station table */
1091 sta_id = iwl_mvm_get_key_sta_id(vif, sta);
1092
1093 IWL_DEBUG_WEP(mvm, "mvm remove dynamic key: idx=%d sta=%d\n",
1094 keyconf->keyidx, sta_id);
1095
1096 if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC)
1097 return iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, true);
1098
1099 ret = __test_and_clear_bit(keyconf->hw_key_idx, mvm->fw_key_table);
1100 if (!ret) {
1101 IWL_ERR(mvm, "offset %d not used in fw key table.\n",
1102 keyconf->hw_key_idx);
1103 return -ENOENT;
1104 }
1105
1106 if (sta_id == IWL_INVALID_STATION) {
1107 IWL_DEBUG_WEP(mvm, "station non-existent, early return.\n");
1108 return 0;
1109 }
1110
1111 /*
1112 * It is possible that the 'sta' parameter is NULL, and thus
1113 * there is a need to retrieve the sta from the local station table,
1114 * for example when a GTK is removed (where the sta_id will then be
1115 * the AP ID, and no station was passed by mac80211.)
1116 */
1117 if (!sta) {
1118 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
1119 lockdep_is_held(&mvm->mutex));
1120 if (!sta) {
1121 IWL_ERR(mvm, "Invalid station id\n");
1122 return -EINVAL;
1123 }
1124 }
1125
1126 mvm_sta = (struct iwl_mvm_sta *)sta->drv_priv;
1127 if (WARN_ON_ONCE(mvm_sta->vif != vif))
1128 return -EINVAL;
1129
1130 key_flags = cpu_to_le16((keyconf->keyidx << STA_KEY_FLG_KEYID_POS) &
1131 STA_KEY_FLG_KEYID_MSK);
1132 key_flags |= cpu_to_le16(STA_KEY_FLG_NO_ENC | STA_KEY_FLG_WEP_KEY_MAP);
1133 key_flags |= cpu_to_le16(STA_KEY_NOT_VALID);
1134
1135 if (!(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE))
1136 key_flags |= cpu_to_le16(STA_KEY_MULTICAST);
1137
1138 cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color);
1139 cmd.key.key_flags = key_flags;
1140 cmd.key.key_offset = keyconf->hw_key_idx;
1141 cmd.sta_id = sta_id;
1142
1143 cmd.modify_mask = STA_MODIFY_KEY;
1144 cmd.add_modify = STA_MODE_MODIFY;
1145
1146 status = ADD_STA_SUCCESS;
1147 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, sizeof(cmd),
1148 &cmd, &status);
1149
1150 switch (status) {
1151 case ADD_STA_SUCCESS:
1152 IWL_DEBUG_WEP(mvm, "MODIFY_STA: remove sta key passed\n");
1153 break;
1154 default:
1155 ret = -EIO;
1156 IWL_ERR(mvm, "MODIFY_STA: remove sta key failed\n");
1157 break;
1158 }
1159
1160 return ret;
1161 }
1162
1163 void iwl_mvm_update_tkip_key(struct iwl_mvm *mvm,
1164 struct ieee80211_vif *vif,
1165 struct ieee80211_key_conf *keyconf,
1166 struct ieee80211_sta *sta, u32 iv32,
1167 u16 *phase1key)
1168 {
1169 struct iwl_mvm_sta *mvm_sta;
1170 u8 sta_id = iwl_mvm_get_key_sta_id(vif, sta);
1171
1172 if (WARN_ON_ONCE(sta_id == IWL_INVALID_STATION))
1173 return;
1174
1175 rcu_read_lock();
1176
1177 if (!sta) {
1178 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
1179 if (WARN_ON(IS_ERR_OR_NULL(sta))) {
1180 rcu_read_unlock();
1181 return;
1182 }
1183 }
1184
1185 mvm_sta = (void *)sta->drv_priv;
1186 iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, sta_id,
1187 iv32, phase1key, CMD_ASYNC);
1188 rcu_read_unlock();
1189 }
1190
1191 void iwl_mvm_sta_modify_ps_wake(struct iwl_mvm *mvm,
1192 struct ieee80211_sta *sta)
1193 {
1194 struct iwl_mvm_sta *mvmsta = (void *)sta->drv_priv;
1195 struct iwl_mvm_add_sta_cmd cmd = {
1196 .add_modify = STA_MODE_MODIFY,
1197 .sta_id = mvmsta->sta_id,
1198 .modify_mask = STA_MODIFY_SLEEPING_STA_TX_COUNT,
1199 .sleep_state_flags = cpu_to_le16(STA_SLEEP_STATE_AWAKE),
1200 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
1201 };
1202 int ret;
1203
1204 /*
1205 * Same modify mask for sleep_tx_count and sleep_state_flags but this
1206 * should be fine since if we set the STA as "awake", then
1207 * sleep_tx_count is not relevant.
1208 */
1209 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC, sizeof(cmd), &cmd);
1210 if (ret)
1211 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
1212 }
1213
1214 void iwl_mvm_sta_modify_sleep_tx_count(struct iwl_mvm *mvm,
1215 struct ieee80211_sta *sta,
1216 enum ieee80211_frame_release_type reason,
1217 u16 cnt)
1218 {
1219 u16 sleep_state_flags =
1220 (reason == IEEE80211_FRAME_RELEASE_UAPSD) ?
1221 STA_SLEEP_STATE_UAPSD : STA_SLEEP_STATE_PS_POLL;
1222 struct iwl_mvm_sta *mvmsta = (void *)sta->drv_priv;
1223 struct iwl_mvm_add_sta_cmd cmd = {
1224 .add_modify = STA_MODE_MODIFY,
1225 .sta_id = mvmsta->sta_id,
1226 .modify_mask = STA_MODIFY_SLEEPING_STA_TX_COUNT,
1227 .sleep_tx_count = cpu_to_le16(cnt),
1228 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
1229 /*
1230 * Same modify mask for sleep_tx_count and sleep_state_flags so
1231 * we must set the sleep_state_flags too.
1232 */
1233 .sleep_state_flags = cpu_to_le16(sleep_state_flags),
1234 };
1235 int ret;
1236
1237 /* TODO: somehow the fw doesn't seem to take PS_POLL into account */
1238 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC, sizeof(cmd), &cmd);
1239 if (ret)
1240 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
1241 }
Linux kernel - Deliverables
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