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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rkuo/linux...
[GitHub/mt8127/android_kernel_alcatel_ttab.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 COPYING.
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 add_sta_cmd.station_flags_msk |= cpu_to_le32(STA_FLG_FAT_EN_MSK |
105 STA_FLG_MIMO_EN_MSK);
106
107 switch (sta->bandwidth) {
108 case IEEE80211_STA_RX_BW_160:
109 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_160MHZ);
110 /* fall through */
111 case IEEE80211_STA_RX_BW_80:
112 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_80MHZ);
113 /* fall through */
114 case IEEE80211_STA_RX_BW_40:
115 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_40MHZ);
116 /* fall through */
117 case IEEE80211_STA_RX_BW_20:
118 if (sta->ht_cap.ht_supported)
119 add_sta_cmd.station_flags |=
120 cpu_to_le32(STA_FLG_FAT_EN_20MHZ);
121 break;
122 }
123
124 switch (sta->rx_nss) {
125 case 1:
126 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_SISO);
127 break;
128 case 2:
129 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_MIMO2);
130 break;
131 case 3 ... 8:
132 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_MIMO3);
133 break;
134 }
135
136 switch (sta->smps_mode) {
137 case IEEE80211_SMPS_AUTOMATIC:
138 case IEEE80211_SMPS_NUM_MODES:
139 WARN_ON(1);
140 break;
141 case IEEE80211_SMPS_STATIC:
142 /* override NSS */
143 add_sta_cmd.station_flags &= ~cpu_to_le32(STA_FLG_MIMO_EN_MSK);
144 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_SISO);
145 break;
146 case IEEE80211_SMPS_DYNAMIC:
147 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_RTS_MIMO_PROT);
148 break;
149 case IEEE80211_SMPS_OFF:
150 /* nothing */
151 break;
152 }
153
154 if (sta->ht_cap.ht_supported) {
155 add_sta_cmd.station_flags_msk |=
156 cpu_to_le32(STA_FLG_MAX_AGG_SIZE_MSK |
157 STA_FLG_AGG_MPDU_DENS_MSK);
158
159 mpdu_dens = sta->ht_cap.ampdu_density;
160 }
161
162 if (sta->vht_cap.vht_supported) {
163 agg_size = sta->vht_cap.cap &
164 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK;
165 agg_size >>=
166 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_SHIFT;
167 } else if (sta->ht_cap.ht_supported) {
168 agg_size = sta->ht_cap.ampdu_factor;
169 }
170
171 add_sta_cmd.station_flags |=
172 cpu_to_le32(agg_size << STA_FLG_MAX_AGG_SIZE_SHIFT);
173 add_sta_cmd.station_flags |=
174 cpu_to_le32(mpdu_dens << STA_FLG_AGG_MPDU_DENS_SHIFT);
175
176 status = ADD_STA_SUCCESS;
177 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, sizeof(add_sta_cmd),
178 &add_sta_cmd, &status);
179 if (ret)
180 return ret;
181
182 switch (status) {
183 case ADD_STA_SUCCESS:
184 IWL_DEBUG_ASSOC(mvm, "ADD_STA PASSED\n");
185 break;
186 default:
187 ret = -EIO;
188 IWL_ERR(mvm, "ADD_STA failed\n");
189 break;
190 }
191
192 return ret;
193 }
194
195 int iwl_mvm_add_sta(struct iwl_mvm *mvm,
196 struct ieee80211_vif *vif,
197 struct ieee80211_sta *sta)
198 {
199 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
200 struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv;
201 int i, ret, sta_id;
202
203 lockdep_assert_held(&mvm->mutex);
204
205 if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
206 sta_id = iwl_mvm_find_free_sta_id(mvm);
207 else
208 sta_id = mvm_sta->sta_id;
209
210 if (WARN_ON_ONCE(sta_id == IWL_MVM_STATION_COUNT))
211 return -ENOSPC;
212
213 spin_lock_init(&mvm_sta->lock);
214
215 mvm_sta->sta_id = sta_id;
216 mvm_sta->mac_id_n_color = FW_CMD_ID_AND_COLOR(mvmvif->id,
217 mvmvif->color);
218 mvm_sta->vif = vif;
219 mvm_sta->max_agg_bufsize = LINK_QUAL_AGG_FRAME_LIMIT_DEF;
220
221 /* HW restart, don't assume the memory has been zeroed */
222 atomic_set(&mvm_sta->pending_frames, 0);
223 mvm_sta->tid_disable_agg = 0;
224 mvm_sta->tfd_queue_msk = 0;
225 for (i = 0; i < IEEE80211_NUM_ACS; i++)
226 if (vif->hw_queue[i] != IEEE80211_INVAL_HW_QUEUE)
227 mvm_sta->tfd_queue_msk |= BIT(vif->hw_queue[i]);
228
229 if (vif->cab_queue != IEEE80211_INVAL_HW_QUEUE)
230 mvm_sta->tfd_queue_msk |= BIT(vif->cab_queue);
231
232 /* for HW restart - need to reset the seq_number etc... */
233 memset(mvm_sta->tid_data, 0, sizeof(mvm_sta->tid_data));
234
235 ret = iwl_mvm_sta_send_to_fw(mvm, sta, false);
236 if (ret)
237 return ret;
238
239 /* The first station added is the AP, the others are TDLS STAs */
240 if (vif->type == NL80211_IFTYPE_STATION &&
241 mvmvif->ap_sta_id == IWL_MVM_STATION_COUNT)
242 mvmvif->ap_sta_id = sta_id;
243
244 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta_id], sta);
245
246 return 0;
247 }
248
249 int iwl_mvm_update_sta(struct iwl_mvm *mvm,
250 struct ieee80211_vif *vif,
251 struct ieee80211_sta *sta)
252 {
253 return iwl_mvm_sta_send_to_fw(mvm, sta, true);
254 }
255
256 int iwl_mvm_drain_sta(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta,
257 bool drain)
258 {
259 struct iwl_mvm_add_sta_cmd cmd = {};
260 int ret;
261 u32 status;
262
263 lockdep_assert_held(&mvm->mutex);
264
265 cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color);
266 cmd.sta_id = mvmsta->sta_id;
267 cmd.add_modify = STA_MODE_MODIFY;
268 cmd.station_flags = drain ? cpu_to_le32(STA_FLG_DRAIN_FLOW) : 0;
269 cmd.station_flags_msk = cpu_to_le32(STA_FLG_DRAIN_FLOW);
270
271 status = ADD_STA_SUCCESS;
272 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, sizeof(cmd),
273 &cmd, &status);
274 if (ret)
275 return ret;
276
277 switch (status) {
278 case ADD_STA_SUCCESS:
279 IWL_DEBUG_INFO(mvm, "Frames for staid %d will drained in fw\n",
280 mvmsta->sta_id);
281 break;
282 default:
283 ret = -EIO;
284 IWL_ERR(mvm, "Couldn't drain frames for staid %d\n",
285 mvmsta->sta_id);
286 break;
287 }
288
289 return ret;
290 }
291
292 /*
293 * Remove a station from the FW table. Before sending the command to remove
294 * the station validate that the station is indeed known to the driver (sanity
295 * only).
296 */
297 static int iwl_mvm_rm_sta_common(struct iwl_mvm *mvm, u8 sta_id)
298 {
299 struct ieee80211_sta *sta;
300 struct iwl_mvm_rm_sta_cmd rm_sta_cmd = {
301 .sta_id = sta_id,
302 };
303 int ret;
304
305 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
306 lockdep_is_held(&mvm->mutex));
307
308 /* Note: internal stations are marked as error values */
309 if (!sta) {
310 IWL_ERR(mvm, "Invalid station id\n");
311 return -EINVAL;
312 }
313
314 ret = iwl_mvm_send_cmd_pdu(mvm, REMOVE_STA, CMD_SYNC,
315 sizeof(rm_sta_cmd), &rm_sta_cmd);
316 if (ret) {
317 IWL_ERR(mvm, "Failed to remove station. Id=%d\n", sta_id);
318 return ret;
319 }
320
321 return 0;
322 }
323
324 void iwl_mvm_sta_drained_wk(struct work_struct *wk)
325 {
326 struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm, sta_drained_wk);
327 u8 sta_id;
328
329 /*
330 * The mutex is needed because of the SYNC cmd, but not only: if the
331 * work would run concurrently with iwl_mvm_rm_sta, it would run before
332 * iwl_mvm_rm_sta sets the station as busy, and exit. Then
333 * iwl_mvm_rm_sta would set the station as busy, and nobody will clean
334 * that later.
335 */
336 mutex_lock(&mvm->mutex);
337
338 for_each_set_bit(sta_id, mvm->sta_drained, IWL_MVM_STATION_COUNT) {
339 int ret;
340 struct ieee80211_sta *sta =
341 rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
342 lockdep_is_held(&mvm->mutex));
343
344 /* This station is in use */
345 if (!IS_ERR(sta))
346 continue;
347
348 if (PTR_ERR(sta) == -EINVAL) {
349 IWL_ERR(mvm, "Drained sta %d, but it is internal?\n",
350 sta_id);
351 continue;
352 }
353
354 if (!sta) {
355 IWL_ERR(mvm, "Drained sta %d, but it was NULL?\n",
356 sta_id);
357 continue;
358 }
359
360 WARN_ON(PTR_ERR(sta) != -EBUSY);
361 /* This station was removed and we waited until it got drained,
362 * we can now proceed and remove it.
363 */
364 ret = iwl_mvm_rm_sta_common(mvm, sta_id);
365 if (ret) {
366 IWL_ERR(mvm,
367 "Couldn't remove sta %d after it was drained\n",
368 sta_id);
369 continue;
370 }
371 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta_id], NULL);
372 clear_bit(sta_id, mvm->sta_drained);
373 }
374
375 mutex_unlock(&mvm->mutex);
376 }
377
378 int iwl_mvm_rm_sta(struct iwl_mvm *mvm,
379 struct ieee80211_vif *vif,
380 struct ieee80211_sta *sta)
381 {
382 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
383 struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv;
384 int ret;
385
386 lockdep_assert_held(&mvm->mutex);
387
388 if (vif->type == NL80211_IFTYPE_STATION &&
389 mvmvif->ap_sta_id == mvm_sta->sta_id) {
390 /* flush its queues here since we are freeing mvm_sta */
391 ret = iwl_mvm_flush_tx_path(mvm, mvm_sta->tfd_queue_msk, true);
392
393 /*
394 * Put a non-NULL since the fw station isn't removed.
395 * It will be removed after the MAC will be set as
396 * unassoc.
397 */
398 rcu_assign_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id],
399 ERR_PTR(-EINVAL));
400
401 /* if we are associated - we can't remove the AP STA now */
402 if (vif->bss_conf.assoc)
403 return ret;
404
405 /* unassoc - go ahead - remove the AP STA now */
406 mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
407 }
408
409 /*
410 * There are frames pending on the AC queues for this station.
411 * We need to wait until all the frames are drained...
412 */
413 if (atomic_read(&mvm_sta->pending_frames)) {
414 ret = iwl_mvm_drain_sta(mvm, mvm_sta, true);
415 rcu_assign_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id],
416 ERR_PTR(-EBUSY));
417 } else {
418 ret = iwl_mvm_rm_sta_common(mvm, mvm_sta->sta_id);
419 rcu_assign_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id], NULL);
420 }
421
422 return ret;
423 }
424
425 int iwl_mvm_rm_sta_id(struct iwl_mvm *mvm,
426 struct ieee80211_vif *vif,
427 u8 sta_id)
428 {
429 int ret = iwl_mvm_rm_sta_common(mvm, sta_id);
430
431 lockdep_assert_held(&mvm->mutex);
432
433 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta_id], NULL);
434 return ret;
435 }
436
437 int iwl_mvm_allocate_int_sta(struct iwl_mvm *mvm, struct iwl_mvm_int_sta *sta,
438 u32 qmask)
439 {
440 if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
441 sta->sta_id = iwl_mvm_find_free_sta_id(mvm);
442 if (WARN_ON_ONCE(sta->sta_id == IWL_MVM_STATION_COUNT))
443 return -ENOSPC;
444 }
445
446 sta->tfd_queue_msk = qmask;
447
448 /* put a non-NULL value so iterating over the stations won't stop */
449 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta->sta_id], ERR_PTR(-EINVAL));
450 return 0;
451 }
452
453 void iwl_mvm_dealloc_int_sta(struct iwl_mvm *mvm, struct iwl_mvm_int_sta *sta)
454 {
455 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta->sta_id], NULL);
456 memset(sta, 0, sizeof(struct iwl_mvm_int_sta));
457 sta->sta_id = IWL_MVM_STATION_COUNT;
458 }
459
460 static int iwl_mvm_add_int_sta_common(struct iwl_mvm *mvm,
461 struct iwl_mvm_int_sta *sta,
462 const u8 *addr,
463 u16 mac_id, u16 color)
464 {
465 struct iwl_mvm_add_sta_cmd cmd;
466 int ret;
467 u32 status;
468
469 lockdep_assert_held(&mvm->mutex);
470
471 memset(&cmd, 0, sizeof(struct iwl_mvm_add_sta_cmd));
472 cmd.sta_id = sta->sta_id;
473 cmd.mac_id_n_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(mac_id,
474 color));
475
476 cmd.tfd_queue_msk = cpu_to_le32(sta->tfd_queue_msk);
477
478 if (addr)
479 memcpy(cmd.addr, addr, ETH_ALEN);
480
481 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, sizeof(cmd),
482 &cmd, &status);
483 if (ret)
484 return ret;
485
486 switch (status) {
487 case ADD_STA_SUCCESS:
488 IWL_DEBUG_INFO(mvm, "Internal station added.\n");
489 return 0;
490 default:
491 ret = -EIO;
492 IWL_ERR(mvm, "Add internal station failed, status=0x%x\n",
493 status);
494 break;
495 }
496 return ret;
497 }
498
499 int iwl_mvm_add_aux_sta(struct iwl_mvm *mvm)
500 {
501 int ret;
502
503 lockdep_assert_held(&mvm->mutex);
504
505 /* Add the aux station, but without any queues */
506 ret = iwl_mvm_allocate_int_sta(mvm, &mvm->aux_sta, 0);
507 if (ret)
508 return ret;
509
510 ret = iwl_mvm_add_int_sta_common(mvm, &mvm->aux_sta, NULL,
511 MAC_INDEX_AUX, 0);
512
513 if (ret)
514 iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta);
515 return ret;
516 }
517
518 /*
519 * Send the add station command for the vif's broadcast station.
520 * Assumes that the station was already allocated.
521 *
522 * @mvm: the mvm component
523 * @vif: the interface to which the broadcast station is added
524 * @bsta: the broadcast station to add.
525 */
526 int iwl_mvm_send_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
527 struct iwl_mvm_int_sta *bsta)
528 {
529 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
530 static const u8 baddr[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
531
532 lockdep_assert_held(&mvm->mutex);
533
534 if (WARN_ON_ONCE(bsta->sta_id == IWL_MVM_STATION_COUNT))
535 return -ENOSPC;
536
537 return iwl_mvm_add_int_sta_common(mvm, bsta, baddr,
538 mvmvif->id, mvmvif->color);
539 }
540
541 /* Send the FW a request to remove the station from it's internal data
542 * structures, but DO NOT remove the entry from the local data structures. */
543 int iwl_mvm_send_rm_bcast_sta(struct iwl_mvm *mvm,
544 struct iwl_mvm_int_sta *bsta)
545 {
546 int ret;
547
548 lockdep_assert_held(&mvm->mutex);
549
550 ret = iwl_mvm_rm_sta_common(mvm, bsta->sta_id);
551 if (ret)
552 IWL_WARN(mvm, "Failed sending remove station\n");
553 return ret;
554 }
555
556 /* Allocate a new station entry for the broadcast station to the given vif,
557 * and send it to the FW.
558 * Note that each P2P mac should have its own broadcast station.
559 *
560 * @mvm: the mvm component
561 * @vif: the interface to which the broadcast station is added
562 * @bsta: the broadcast station to add. */
563 int iwl_mvm_add_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
564 struct iwl_mvm_int_sta *bsta)
565 {
566 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
567 static const u8 baddr[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
568 u32 qmask;
569 int ret;
570
571 lockdep_assert_held(&mvm->mutex);
572
573 qmask = iwl_mvm_mac_get_queues_mask(mvm, vif);
574 ret = iwl_mvm_allocate_int_sta(mvm, bsta, qmask);
575 if (ret)
576 return ret;
577
578 ret = iwl_mvm_add_int_sta_common(mvm, bsta, baddr,
579 mvmvif->id, mvmvif->color);
580
581 if (ret)
582 iwl_mvm_dealloc_int_sta(mvm, bsta);
583 return ret;
584 }
585
586 /*
587 * Send the FW a request to remove the station from it's internal data
588 * structures, and in addition remove it from the local data structure.
589 */
590 int iwl_mvm_rm_bcast_sta(struct iwl_mvm *mvm, struct iwl_mvm_int_sta *bsta)
591 {
592 int ret;
593
594 lockdep_assert_held(&mvm->mutex);
595
596 ret = iwl_mvm_rm_sta_common(mvm, bsta->sta_id);
597 if (ret)
598 return ret;
599
600 iwl_mvm_dealloc_int_sta(mvm, bsta);
601 return ret;
602 }
603
604 int iwl_mvm_sta_rx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
605 int tid, u16 ssn, bool start)
606 {
607 struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv;
608 struct iwl_mvm_add_sta_cmd cmd = {};
609 int ret;
610 u32 status;
611
612 lockdep_assert_held(&mvm->mutex);
613
614 cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color);
615 cmd.sta_id = mvm_sta->sta_id;
616 cmd.add_modify = STA_MODE_MODIFY;
617 cmd.add_immediate_ba_tid = (u8) tid;
618 cmd.add_immediate_ba_ssn = cpu_to_le16(ssn);
619 cmd.modify_mask = start ? STA_MODIFY_ADD_BA_TID :
620 STA_MODIFY_REMOVE_BA_TID;
621
622 status = ADD_STA_SUCCESS;
623 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, sizeof(cmd),
624 &cmd, &status);
625 if (ret)
626 return ret;
627
628 switch (status) {
629 case ADD_STA_SUCCESS:
630 IWL_DEBUG_INFO(mvm, "RX BA Session %sed in fw\n",
631 start ? "start" : "stopp");
632 break;
633 case ADD_STA_IMMEDIATE_BA_FAILURE:
634 IWL_WARN(mvm, "RX BA Session refused by fw\n");
635 ret = -ENOSPC;
636 break;
637 default:
638 ret = -EIO;
639 IWL_ERR(mvm, "RX BA Session failed %sing, status 0x%x\n",
640 start ? "start" : "stopp", status);
641 break;
642 }
643
644 return ret;
645 }
646
647 static int iwl_mvm_sta_tx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
648 int tid, u8 queue, bool start)
649 {
650 struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv;
651 struct iwl_mvm_add_sta_cmd cmd = {};
652 int ret;
653 u32 status;
654
655 lockdep_assert_held(&mvm->mutex);
656
657 if (start) {
658 mvm_sta->tfd_queue_msk |= BIT(queue);
659 mvm_sta->tid_disable_agg &= ~BIT(tid);
660 } else {
661 mvm_sta->tfd_queue_msk &= ~BIT(queue);
662 mvm_sta->tid_disable_agg |= BIT(tid);
663 }
664
665 cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color);
666 cmd.sta_id = mvm_sta->sta_id;
667 cmd.add_modify = STA_MODE_MODIFY;
668 cmd.modify_mask = STA_MODIFY_QUEUES | STA_MODIFY_TID_DISABLE_TX;
669 cmd.tfd_queue_msk = cpu_to_le32(mvm_sta->tfd_queue_msk);
670 cmd.tid_disable_tx = cpu_to_le16(mvm_sta->tid_disable_agg);
671
672 status = ADD_STA_SUCCESS;
673 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, sizeof(cmd),
674 &cmd, &status);
675 if (ret)
676 return ret;
677
678 switch (status) {
679 case ADD_STA_SUCCESS:
680 break;
681 default:
682 ret = -EIO;
683 IWL_ERR(mvm, "TX BA Session failed %sing, status 0x%x\n",
684 start ? "start" : "stopp", status);
685 break;
686 }
687
688 return ret;
689 }
690
691 static const u8 tid_to_ac[] = {
692 IEEE80211_AC_BE,
693 IEEE80211_AC_BK,
694 IEEE80211_AC_BK,
695 IEEE80211_AC_BE,
696 IEEE80211_AC_VI,
697 IEEE80211_AC_VI,
698 IEEE80211_AC_VO,
699 IEEE80211_AC_VO,
700 };
701
702 int iwl_mvm_sta_tx_agg_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
703 struct ieee80211_sta *sta, u16 tid, u16 *ssn)
704 {
705 struct iwl_mvm_sta *mvmsta = (void *)sta->drv_priv;
706 struct iwl_mvm_tid_data *tid_data;
707 int txq_id;
708
709 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
710 return -EINVAL;
711
712 if (mvmsta->tid_data[tid].state != IWL_AGG_OFF) {
713 IWL_ERR(mvm, "Start AGG when state is not IWL_AGG_OFF %d!\n",
714 mvmsta->tid_data[tid].state);
715 return -ENXIO;
716 }
717
718 lockdep_assert_held(&mvm->mutex);
719
720 for (txq_id = IWL_MVM_FIRST_AGG_QUEUE;
721 txq_id <= IWL_MVM_LAST_AGG_QUEUE; txq_id++)
722 if (mvm->queue_to_mac80211[txq_id] ==
723 IWL_INVALID_MAC80211_QUEUE)
724 break;
725
726 if (txq_id > IWL_MVM_LAST_AGG_QUEUE) {
727 IWL_ERR(mvm, "Failed to allocate agg queue\n");
728 return -EIO;
729 }
730
731 /* the new tx queue is still connected to the same mac80211 queue */
732 mvm->queue_to_mac80211[txq_id] = vif->hw_queue[tid_to_ac[tid]];
733
734 spin_lock_bh(&mvmsta->lock);
735 tid_data = &mvmsta->tid_data[tid];
736 tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
737 tid_data->txq_id = txq_id;
738 *ssn = tid_data->ssn;
739
740 IWL_DEBUG_TX_QUEUES(mvm,
741 "Start AGG: sta %d tid %d queue %d - ssn = %d, next_recl = %d\n",
742 mvmsta->sta_id, tid, txq_id, tid_data->ssn,
743 tid_data->next_reclaimed);
744
745 if (tid_data->ssn == tid_data->next_reclaimed) {
746 tid_data->state = IWL_AGG_STARTING;
747 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
748 } else {
749 tid_data->state = IWL_EMPTYING_HW_QUEUE_ADDBA;
750 }
751
752 spin_unlock_bh(&mvmsta->lock);
753
754 return 0;
755 }
756
757 int iwl_mvm_sta_tx_agg_oper(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
758 struct ieee80211_sta *sta, u16 tid, u8 buf_size)
759 {
760 struct iwl_mvm_sta *mvmsta = (void *)sta->drv_priv;
761 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
762 int queue, fifo, ret;
763 u16 ssn;
764
765 buf_size = min_t(int, buf_size, LINK_QUAL_AGG_FRAME_LIMIT_DEF);
766
767 spin_lock_bh(&mvmsta->lock);
768 ssn = tid_data->ssn;
769 queue = tid_data->txq_id;
770 tid_data->state = IWL_AGG_ON;
771 tid_data->ssn = 0xffff;
772 spin_unlock_bh(&mvmsta->lock);
773
774 fifo = iwl_mvm_ac_to_tx_fifo[tid_to_ac[tid]];
775
776 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true);
777 if (ret)
778 return -EIO;
779
780 iwl_trans_txq_enable(mvm->trans, queue, fifo, mvmsta->sta_id, tid,
781 buf_size, ssn);
782
783 /*
784 * Even though in theory the peer could have different
785 * aggregation reorder buffer sizes for different sessions,
786 * our ucode doesn't allow for that and has a global limit
787 * for each station. Therefore, use the minimum of all the
788 * aggregation sessions and our default value.
789 */
790 mvmsta->max_agg_bufsize =
791 min(mvmsta->max_agg_bufsize, buf_size);
792 mvmsta->lq_sta.lq.agg_frame_cnt_limit = mvmsta->max_agg_bufsize;
793
794 if (mvm->cfg->ht_params->use_rts_for_aggregation) {
795 /*
796 * switch to RTS/CTS if it is the prefer protection
797 * method for HT traffic
798 */
799 mvmsta->lq_sta.lq.flags |= LQ_FLAG_SET_STA_TLC_RTS_MSK;
800 /*
801 * TODO: remove the TLC_RTS flag when we tear down the last
802 * AGG session (agg_tids_count in DVM)
803 */
804 }
805
806 IWL_DEBUG_HT(mvm, "Tx aggregation enabled on ra = %pM tid = %d\n",
807 sta->addr, tid);
808
809 return iwl_mvm_send_lq_cmd(mvm, &mvmsta->lq_sta.lq, CMD_ASYNC, false);
810 }
811
812 int iwl_mvm_sta_tx_agg_stop(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
813 struct ieee80211_sta *sta, u16 tid)
814 {
815 struct iwl_mvm_sta *mvmsta = (void *)sta->drv_priv;
816 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
817 u16 txq_id;
818 int err;
819
820
821 /*
822 * If mac80211 is cleaning its state, then say that we finished since
823 * our state has been cleared anyway.
824 */
825 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
826 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
827 return 0;
828 }
829
830 spin_lock_bh(&mvmsta->lock);
831
832 txq_id = tid_data->txq_id;
833
834 IWL_DEBUG_TX_QUEUES(mvm, "Stop AGG: sta %d tid %d q %d state %d\n",
835 mvmsta->sta_id, tid, txq_id, tid_data->state);
836
837 switch (tid_data->state) {
838 case IWL_AGG_ON:
839 tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
840
841 IWL_DEBUG_TX_QUEUES(mvm,
842 "ssn = %d, next_recl = %d\n",
843 tid_data->ssn, tid_data->next_reclaimed);
844
845 /* There are still packets for this RA / TID in the HW */
846 if (tid_data->ssn != tid_data->next_reclaimed) {
847 tid_data->state = IWL_EMPTYING_HW_QUEUE_DELBA;
848 err = 0;
849 break;
850 }
851
852 tid_data->ssn = 0xffff;
853 iwl_trans_txq_disable(mvm->trans, txq_id);
854 /* fall through */
855 case IWL_AGG_STARTING:
856 case IWL_EMPTYING_HW_QUEUE_ADDBA:
857 /*
858 * The agg session has been stopped before it was set up. This
859 * can happen when the AddBA timer times out for example.
860 */
861
862 /* No barriers since we are under mutex */
863 lockdep_assert_held(&mvm->mutex);
864 mvm->queue_to_mac80211[txq_id] = IWL_INVALID_MAC80211_QUEUE;
865
866 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
867 tid_data->state = IWL_AGG_OFF;
868 err = 0;
869 break;
870 default:
871 IWL_ERR(mvm,
872 "Stopping AGG while state not ON or starting for %d on %d (%d)\n",
873 mvmsta->sta_id, tid, tid_data->state);
874 IWL_ERR(mvm,
875 "\ttid_data->txq_id = %d\n", tid_data->txq_id);
876 err = -EINVAL;
877 }
878
879 spin_unlock_bh(&mvmsta->lock);
880
881 return err;
882 }
883
884 int iwl_mvm_sta_tx_agg_flush(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
885 struct ieee80211_sta *sta, u16 tid)
886 {
887 struct iwl_mvm_sta *mvmsta = (void *)sta->drv_priv;
888 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
889 u16 txq_id;
890
891 /*
892 * First set the agg state to OFF to avoid calling
893 * ieee80211_stop_tx_ba_cb in iwl_mvm_check_ratid_empty.
894 */
895 spin_lock_bh(&mvmsta->lock);
896 txq_id = tid_data->txq_id;
897 IWL_DEBUG_TX_QUEUES(mvm, "Flush AGG: sta %d tid %d q %d state %d\n",
898 mvmsta->sta_id, tid, txq_id, tid_data->state);
899 tid_data->state = IWL_AGG_OFF;
900 spin_unlock_bh(&mvmsta->lock);
901
902 if (iwl_mvm_flush_tx_path(mvm, BIT(txq_id), true))
903 IWL_ERR(mvm, "Couldn't flush the AGG queue\n");
904
905 iwl_trans_txq_disable(mvm->trans, tid_data->txq_id);
906 mvm->queue_to_mac80211[tid_data->txq_id] =
907 IWL_INVALID_MAC80211_QUEUE;
908
909 return 0;
910 }
911
912 static int iwl_mvm_set_fw_key_idx(struct iwl_mvm *mvm)
913 {
914 int i;
915
916 lockdep_assert_held(&mvm->mutex);
917
918 i = find_first_zero_bit(mvm->fw_key_table, STA_KEY_MAX_NUM);
919
920 if (i == STA_KEY_MAX_NUM)
921 return STA_KEY_IDX_INVALID;
922
923 __set_bit(i, mvm->fw_key_table);
924
925 return i;
926 }
927
928 static u8 iwl_mvm_get_key_sta_id(struct ieee80211_vif *vif,
929 struct ieee80211_sta *sta)
930 {
931 struct iwl_mvm_vif *mvmvif = (void *)vif->drv_priv;
932
933 if (sta) {
934 struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv;
935
936 return mvm_sta->sta_id;
937 }
938
939 /*
940 * The device expects GTKs for station interfaces to be
941 * installed as GTKs for the AP station. If we have no
942 * station ID, then use AP's station ID.
943 */
944 if (vif->type == NL80211_IFTYPE_STATION &&
945 mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT)
946 return mvmvif->ap_sta_id;
947
948 return IWL_MVM_STATION_COUNT;
949 }
950
951 static int iwl_mvm_send_sta_key(struct iwl_mvm *mvm,
952 struct iwl_mvm_sta *mvm_sta,
953 struct ieee80211_key_conf *keyconf,
954 u8 sta_id, u32 tkip_iv32, u16 *tkip_p1k,
955 u32 cmd_flags)
956 {
957 __le16 key_flags;
958 struct iwl_mvm_add_sta_cmd cmd = {};
959 int ret, status;
960 u16 keyidx;
961 int i;
962
963 keyidx = (keyconf->keyidx << STA_KEY_FLG_KEYID_POS) &
964 STA_KEY_FLG_KEYID_MSK;
965 key_flags = cpu_to_le16(keyidx);
966 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_KEY_MAP);
967
968 switch (keyconf->cipher) {
969 case WLAN_CIPHER_SUITE_TKIP:
970 key_flags |= cpu_to_le16(STA_KEY_FLG_TKIP);
971 cmd.key.tkip_rx_tsc_byte2 = tkip_iv32;
972 for (i = 0; i < 5; i++)
973 cmd.key.tkip_rx_ttak[i] = cpu_to_le16(tkip_p1k[i]);
974 memcpy(cmd.key.key, keyconf->key, keyconf->keylen);
975 break;
976 case WLAN_CIPHER_SUITE_CCMP:
977 key_flags |= cpu_to_le16(STA_KEY_FLG_CCM);
978 memcpy(cmd.key.key, keyconf->key, keyconf->keylen);
979 break;
980 default:
981 WARN_ON(1);
982 return -EINVAL;
983 }
984
985 if (!(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE))
986 key_flags |= cpu_to_le16(STA_KEY_MULTICAST);
987
988 cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color);
989 cmd.key.key_offset = keyconf->hw_key_idx;
990 cmd.key.key_flags = key_flags;
991 cmd.add_modify = STA_MODE_MODIFY;
992 cmd.modify_mask = STA_MODIFY_KEY;
993 cmd.sta_id = sta_id;
994
995 status = ADD_STA_SUCCESS;
996 if (cmd_flags == CMD_SYNC)
997 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, sizeof(cmd),
998 &cmd, &status);
999 else
1000 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC,
1001 sizeof(cmd), &cmd);
1002
1003 switch (status) {
1004 case ADD_STA_SUCCESS:
1005 IWL_DEBUG_WEP(mvm, "MODIFY_STA: set dynamic key passed\n");
1006 break;
1007 default:
1008 ret = -EIO;
1009 IWL_ERR(mvm, "MODIFY_STA: set dynamic key failed\n");
1010 break;
1011 }
1012
1013 return ret;
1014 }
1015
1016 static int iwl_mvm_send_sta_igtk(struct iwl_mvm *mvm,
1017 struct ieee80211_key_conf *keyconf,
1018 u8 sta_id, bool remove_key)
1019 {
1020 struct iwl_mvm_mgmt_mcast_key_cmd igtk_cmd = {};
1021
1022 /* verify the key details match the required command's expectations */
1023 if (WARN_ON((keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC) ||
1024 (keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE) ||
1025 (keyconf->keyidx != 4 && keyconf->keyidx != 5)))
1026 return -EINVAL;
1027
1028 igtk_cmd.key_id = cpu_to_le32(keyconf->keyidx);
1029 igtk_cmd.sta_id = cpu_to_le32(sta_id);
1030
1031 if (remove_key) {
1032 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_NOT_VALID);
1033 } else {
1034 struct ieee80211_key_seq seq;
1035 const u8 *pn;
1036
1037 memcpy(igtk_cmd.IGTK, keyconf->key, keyconf->keylen);
1038 ieee80211_aes_cmac_calculate_k1_k2(keyconf,
1039 igtk_cmd.K1, igtk_cmd.K2);
1040 ieee80211_get_key_rx_seq(keyconf, 0, &seq);
1041 pn = seq.aes_cmac.pn;
1042 igtk_cmd.receive_seq_cnt = cpu_to_le64(((u64) pn[5] << 0) |
1043 ((u64) pn[4] << 8) |
1044 ((u64) pn[3] << 16) |
1045 ((u64) pn[2] << 24) |
1046 ((u64) pn[1] << 32) |
1047 ((u64) pn[0] << 40));
1048 }
1049
1050 IWL_DEBUG_INFO(mvm, "%s igtk for sta %u\n",
1051 remove_key ? "removing" : "installing",
1052 igtk_cmd.sta_id);
1053
1054 return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, CMD_SYNC,
1055 sizeof(igtk_cmd), &igtk_cmd);
1056 }
1057
1058
1059 static inline u8 *iwl_mvm_get_mac_addr(struct iwl_mvm *mvm,
1060 struct ieee80211_vif *vif,
1061 struct ieee80211_sta *sta)
1062 {
1063 struct iwl_mvm_vif *mvmvif = (void *)vif->drv_priv;
1064
1065 if (sta)
1066 return sta->addr;
1067
1068 if (vif->type == NL80211_IFTYPE_STATION &&
1069 mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT) {
1070 u8 sta_id = mvmvif->ap_sta_id;
1071 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
1072 lockdep_is_held(&mvm->mutex));
1073 return sta->addr;
1074 }
1075
1076
1077 return NULL;
1078 }
1079
1080 int iwl_mvm_set_sta_key(struct iwl_mvm *mvm,
1081 struct ieee80211_vif *vif,
1082 struct ieee80211_sta *sta,
1083 struct ieee80211_key_conf *keyconf,
1084 bool have_key_offset)
1085 {
1086 struct iwl_mvm_sta *mvm_sta;
1087 int ret;
1088 u8 *addr, sta_id;
1089 struct ieee80211_key_seq seq;
1090 u16 p1k[5];
1091
1092 lockdep_assert_held(&mvm->mutex);
1093
1094 /* Get the station id from the mvm local station table */
1095 sta_id = iwl_mvm_get_key_sta_id(vif, sta);
1096 if (sta_id == IWL_MVM_STATION_COUNT) {
1097 IWL_ERR(mvm, "Failed to find station id\n");
1098 return -EINVAL;
1099 }
1100
1101 if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC) {
1102 ret = iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, false);
1103 goto end;
1104 }
1105
1106 /*
1107 * It is possible that the 'sta' parameter is NULL, and thus
1108 * there is a need to retrieve the sta from the local station table.
1109 */
1110 if (!sta) {
1111 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
1112 lockdep_is_held(&mvm->mutex));
1113 if (IS_ERR_OR_NULL(sta)) {
1114 IWL_ERR(mvm, "Invalid station id\n");
1115 return -EINVAL;
1116 }
1117 }
1118
1119 mvm_sta = (struct iwl_mvm_sta *)sta->drv_priv;
1120 if (WARN_ON_ONCE(mvm_sta->vif != vif))
1121 return -EINVAL;
1122
1123 if (!have_key_offset) {
1124 /*
1125 * The D3 firmware hardcodes the PTK offset to 0, so we have to
1126 * configure it there. As a result, this workaround exists to
1127 * let the caller set the key offset (hw_key_idx), see d3.c.
1128 */
1129 keyconf->hw_key_idx = iwl_mvm_set_fw_key_idx(mvm);
1130 if (keyconf->hw_key_idx == STA_KEY_IDX_INVALID)
1131 return -ENOSPC;
1132 }
1133
1134 switch (keyconf->cipher) {
1135 case WLAN_CIPHER_SUITE_TKIP:
1136 addr = iwl_mvm_get_mac_addr(mvm, vif, sta);
1137 /* get phase 1 key from mac80211 */
1138 ieee80211_get_key_rx_seq(keyconf, 0, &seq);
1139 ieee80211_get_tkip_rx_p1k(keyconf, addr, seq.tkip.iv32, p1k);
1140 ret = iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, sta_id,
1141 seq.tkip.iv32, p1k, CMD_SYNC);
1142 break;
1143 case WLAN_CIPHER_SUITE_CCMP:
1144 ret = iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, sta_id,
1145 0, NULL, CMD_SYNC);
1146 break;
1147 default:
1148 IWL_ERR(mvm, "Unknown cipher %x\n", keyconf->cipher);
1149 ret = -EINVAL;
1150 }
1151
1152 if (ret)
1153 __clear_bit(keyconf->hw_key_idx, mvm->fw_key_table);
1154
1155 end:
1156 IWL_DEBUG_WEP(mvm, "key: cipher=%x len=%d idx=%d sta=%pM ret=%d\n",
1157 keyconf->cipher, keyconf->keylen, keyconf->keyidx,
1158 sta->addr, ret);
1159 return ret;
1160 }
1161
1162 int iwl_mvm_remove_sta_key(struct iwl_mvm *mvm,
1163 struct ieee80211_vif *vif,
1164 struct ieee80211_sta *sta,
1165 struct ieee80211_key_conf *keyconf)
1166 {
1167 struct iwl_mvm_sta *mvm_sta;
1168 struct iwl_mvm_add_sta_cmd cmd = {};
1169 __le16 key_flags;
1170 int ret, status;
1171 u8 sta_id;
1172
1173 lockdep_assert_held(&mvm->mutex);
1174
1175 /* Get the station id from the mvm local station table */
1176 sta_id = iwl_mvm_get_key_sta_id(vif, sta);
1177
1178 IWL_DEBUG_WEP(mvm, "mvm remove dynamic key: idx=%d sta=%d\n",
1179 keyconf->keyidx, sta_id);
1180
1181 if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC)
1182 return iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, true);
1183
1184 ret = __test_and_clear_bit(keyconf->hw_key_idx, mvm->fw_key_table);
1185 if (!ret) {
1186 IWL_ERR(mvm, "offset %d not used in fw key table.\n",
1187 keyconf->hw_key_idx);
1188 return -ENOENT;
1189 }
1190
1191 if (sta_id == IWL_MVM_STATION_COUNT) {
1192 IWL_DEBUG_WEP(mvm, "station non-existent, early return.\n");
1193 return 0;
1194 }
1195
1196 /*
1197 * It is possible that the 'sta' parameter is NULL, and thus
1198 * there is a need to retrieve the sta from the local station table,
1199 * for example when a GTK is removed (where the sta_id will then be
1200 * the AP ID, and no station was passed by mac80211.)
1201 */
1202 if (!sta) {
1203 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
1204 lockdep_is_held(&mvm->mutex));
1205 if (!sta) {
1206 IWL_ERR(mvm, "Invalid station id\n");
1207 return -EINVAL;
1208 }
1209 }
1210
1211 mvm_sta = (struct iwl_mvm_sta *)sta->drv_priv;
1212 if (WARN_ON_ONCE(mvm_sta->vif != vif))
1213 return -EINVAL;
1214
1215 key_flags = cpu_to_le16((keyconf->keyidx << STA_KEY_FLG_KEYID_POS) &
1216 STA_KEY_FLG_KEYID_MSK);
1217 key_flags |= cpu_to_le16(STA_KEY_FLG_NO_ENC | STA_KEY_FLG_WEP_KEY_MAP);
1218 key_flags |= cpu_to_le16(STA_KEY_NOT_VALID);
1219
1220 if (!(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE))
1221 key_flags |= cpu_to_le16(STA_KEY_MULTICAST);
1222
1223 cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color);
1224 cmd.key.key_flags = key_flags;
1225 cmd.key.key_offset = keyconf->hw_key_idx;
1226 cmd.sta_id = sta_id;
1227
1228 cmd.modify_mask = STA_MODIFY_KEY;
1229 cmd.add_modify = STA_MODE_MODIFY;
1230
1231 status = ADD_STA_SUCCESS;
1232 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, sizeof(cmd),
1233 &cmd, &status);
1234
1235 switch (status) {
1236 case ADD_STA_SUCCESS:
1237 IWL_DEBUG_WEP(mvm, "MODIFY_STA: remove sta key passed\n");
1238 break;
1239 default:
1240 ret = -EIO;
1241 IWL_ERR(mvm, "MODIFY_STA: remove sta key failed\n");
1242 break;
1243 }
1244
1245 return ret;
1246 }
1247
1248 void iwl_mvm_update_tkip_key(struct iwl_mvm *mvm,
1249 struct ieee80211_vif *vif,
1250 struct ieee80211_key_conf *keyconf,
1251 struct ieee80211_sta *sta, u32 iv32,
1252 u16 *phase1key)
1253 {
1254 struct iwl_mvm_sta *mvm_sta;
1255 u8 sta_id = iwl_mvm_get_key_sta_id(vif, sta);
1256
1257 if (WARN_ON_ONCE(sta_id == IWL_MVM_STATION_COUNT))
1258 return;
1259
1260 rcu_read_lock();
1261
1262 if (!sta) {
1263 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
1264 if (WARN_ON(IS_ERR_OR_NULL(sta))) {
1265 rcu_read_unlock();
1266 return;
1267 }
1268 }
1269
1270 mvm_sta = (void *)sta->drv_priv;
1271 iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, sta_id,
1272 iv32, phase1key, CMD_ASYNC);
1273 rcu_read_unlock();
1274 }
1275
1276 void iwl_mvm_sta_modify_ps_wake(struct iwl_mvm *mvm,
1277 struct ieee80211_sta *sta)
1278 {
1279 struct iwl_mvm_sta *mvmsta = (void *)sta->drv_priv;
1280 struct iwl_mvm_add_sta_cmd cmd = {
1281 .add_modify = STA_MODE_MODIFY,
1282 .sta_id = mvmsta->sta_id,
1283 .modify_mask = STA_MODIFY_SLEEPING_STA_TX_COUNT,
1284 .sleep_state_flags = cpu_to_le16(STA_SLEEP_STATE_AWAKE),
1285 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
1286 };
1287 int ret;
1288
1289 /*
1290 * Same modify mask for sleep_tx_count and sleep_state_flags but this
1291 * should be fine since if we set the STA as "awake", then
1292 * sleep_tx_count is not relevant.
1293 */
1294 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC, sizeof(cmd), &cmd);
1295 if (ret)
1296 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
1297 }
1298
1299 void iwl_mvm_sta_modify_sleep_tx_count(struct iwl_mvm *mvm,
1300 struct ieee80211_sta *sta,
1301 enum ieee80211_frame_release_type reason,
1302 u16 cnt)
1303 {
1304 u16 sleep_state_flags =
1305 (reason == IEEE80211_FRAME_RELEASE_UAPSD) ?
1306 STA_SLEEP_STATE_UAPSD : STA_SLEEP_STATE_PS_POLL;
1307 struct iwl_mvm_sta *mvmsta = (void *)sta->drv_priv;
1308 struct iwl_mvm_add_sta_cmd cmd = {
1309 .add_modify = STA_MODE_MODIFY,
1310 .sta_id = mvmsta->sta_id,
1311 .modify_mask = STA_MODIFY_SLEEPING_STA_TX_COUNT,
1312 .sleep_tx_count = cpu_to_le16(cnt),
1313 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
1314 /*
1315 * Same modify mask for sleep_tx_count and sleep_state_flags so
1316 * we must set the sleep_state_flags too.
1317 */
1318 .sleep_state_flags = cpu_to_le16(sleep_state_flags),
1319 };
1320 int ret;
1321
1322 /* TODO: somehow the fw doesn't seem to take PS_POLL into account */
1323 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC, sizeof(cmd), &cmd);
1324 if (ret)
1325 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
1326 }
kernel source for telekom puls (alcatel/mediatek)