projects / GitHub / mt8127 / android_kernel_alcatel_ttab.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
Merge tag 'nfs-for-3.10-4' of git://git.linux-nfs.org/projects/trondmy/linux-nfs
[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->pending_frames[sta_id], 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 * Make sure that the tx response code sees the station as -EBUSY and
411 * calls the drain worker.
412 */
413 spin_lock_bh(&mvm_sta->lock);
414 /*
415 * There are frames pending on the AC queues for this station.
416 * We need to wait until all the frames are drained...
417 */
418 if (atomic_read(&mvm->pending_frames[mvm_sta->sta_id])) {
419 rcu_assign_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id],
420 ERR_PTR(-EBUSY));
421 spin_unlock_bh(&mvm_sta->lock);
422 ret = iwl_mvm_drain_sta(mvm, mvm_sta, true);
423 } else {
424 spin_unlock_bh(&mvm_sta->lock);
425 ret = iwl_mvm_rm_sta_common(mvm, mvm_sta->sta_id);
426 rcu_assign_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id], NULL);
427 }
428
429 return ret;
430 }
431
432 int iwl_mvm_rm_sta_id(struct iwl_mvm *mvm,
433 struct ieee80211_vif *vif,
434 u8 sta_id)
435 {
436 int ret = iwl_mvm_rm_sta_common(mvm, sta_id);
437
438 lockdep_assert_held(&mvm->mutex);
439
440 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta_id], NULL);
441 return ret;
442 }
443
444 int iwl_mvm_allocate_int_sta(struct iwl_mvm *mvm, struct iwl_mvm_int_sta *sta,
445 u32 qmask)
446 {
447 if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
448 sta->sta_id = iwl_mvm_find_free_sta_id(mvm);
449 if (WARN_ON_ONCE(sta->sta_id == IWL_MVM_STATION_COUNT))
450 return -ENOSPC;
451 }
452
453 sta->tfd_queue_msk = qmask;
454
455 /* put a non-NULL value so iterating over the stations won't stop */
456 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta->sta_id], ERR_PTR(-EINVAL));
457 return 0;
458 }
459
460 void iwl_mvm_dealloc_int_sta(struct iwl_mvm *mvm, struct iwl_mvm_int_sta *sta)
461 {
462 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta->sta_id], NULL);
463 memset(sta, 0, sizeof(struct iwl_mvm_int_sta));
464 sta->sta_id = IWL_MVM_STATION_COUNT;
465 }
466
467 static int iwl_mvm_add_int_sta_common(struct iwl_mvm *mvm,
468 struct iwl_mvm_int_sta *sta,
469 const u8 *addr,
470 u16 mac_id, u16 color)
471 {
472 struct iwl_mvm_add_sta_cmd cmd;
473 int ret;
474 u32 status;
475
476 lockdep_assert_held(&mvm->mutex);
477
478 memset(&cmd, 0, sizeof(struct iwl_mvm_add_sta_cmd));
479 cmd.sta_id = sta->sta_id;
480 cmd.mac_id_n_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(mac_id,
481 color));
482
483 cmd.tfd_queue_msk = cpu_to_le32(sta->tfd_queue_msk);
484
485 if (addr)
486 memcpy(cmd.addr, addr, ETH_ALEN);
487
488 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, sizeof(cmd),
489 &cmd, &status);
490 if (ret)
491 return ret;
492
493 switch (status) {
494 case ADD_STA_SUCCESS:
495 IWL_DEBUG_INFO(mvm, "Internal station added.\n");
496 return 0;
497 default:
498 ret = -EIO;
499 IWL_ERR(mvm, "Add internal station failed, status=0x%x\n",
500 status);
501 break;
502 }
503 return ret;
504 }
505
506 int iwl_mvm_add_aux_sta(struct iwl_mvm *mvm)
507 {
508 int ret;
509
510 lockdep_assert_held(&mvm->mutex);
511
512 /* Add the aux station, but without any queues */
513 ret = iwl_mvm_allocate_int_sta(mvm, &mvm->aux_sta, 0);
514 if (ret)
515 return ret;
516
517 ret = iwl_mvm_add_int_sta_common(mvm, &mvm->aux_sta, NULL,
518 MAC_INDEX_AUX, 0);
519
520 if (ret)
521 iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta);
522 return ret;
523 }
524
525 /*
526 * Send the add station command for the vif's broadcast station.
527 * Assumes that the station was already allocated.
528 *
529 * @mvm: the mvm component
530 * @vif: the interface to which the broadcast station is added
531 * @bsta: the broadcast station to add.
532 */
533 int iwl_mvm_send_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
534 struct iwl_mvm_int_sta *bsta)
535 {
536 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
537 static const u8 baddr[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
538
539 lockdep_assert_held(&mvm->mutex);
540
541 if (WARN_ON_ONCE(bsta->sta_id == IWL_MVM_STATION_COUNT))
542 return -ENOSPC;
543
544 return iwl_mvm_add_int_sta_common(mvm, bsta, baddr,
545 mvmvif->id, mvmvif->color);
546 }
547
548 /* Send the FW a request to remove the station from it's internal data
549 * structures, but DO NOT remove the entry from the local data structures. */
550 int iwl_mvm_send_rm_bcast_sta(struct iwl_mvm *mvm,
551 struct iwl_mvm_int_sta *bsta)
552 {
553 int ret;
554
555 lockdep_assert_held(&mvm->mutex);
556
557 ret = iwl_mvm_rm_sta_common(mvm, bsta->sta_id);
558 if (ret)
559 IWL_WARN(mvm, "Failed sending remove station\n");
560 return ret;
561 }
562
563 /* Allocate a new station entry for the broadcast station to the given vif,
564 * and send it to the FW.
565 * Note that each P2P mac should have its own broadcast station.
566 *
567 * @mvm: the mvm component
568 * @vif: the interface to which the broadcast station is added
569 * @bsta: the broadcast station to add. */
570 int iwl_mvm_add_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
571 struct iwl_mvm_int_sta *bsta)
572 {
573 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
574 static const u8 baddr[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
575 u32 qmask;
576 int ret;
577
578 lockdep_assert_held(&mvm->mutex);
579
580 qmask = iwl_mvm_mac_get_queues_mask(mvm, vif);
581 ret = iwl_mvm_allocate_int_sta(mvm, bsta, qmask);
582 if (ret)
583 return ret;
584
585 ret = iwl_mvm_add_int_sta_common(mvm, bsta, baddr,
586 mvmvif->id, mvmvif->color);
587
588 if (ret)
589 iwl_mvm_dealloc_int_sta(mvm, bsta);
590 return ret;
591 }
592
593 /*
594 * Send the FW a request to remove the station from it's internal data
595 * structures, and in addition remove it from the local data structure.
596 */
597 int iwl_mvm_rm_bcast_sta(struct iwl_mvm *mvm, struct iwl_mvm_int_sta *bsta)
598 {
599 int ret;
600
601 lockdep_assert_held(&mvm->mutex);
602
603 ret = iwl_mvm_rm_sta_common(mvm, bsta->sta_id);
604 if (ret)
605 return ret;
606
607 iwl_mvm_dealloc_int_sta(mvm, bsta);
608 return ret;
609 }
610
611 int iwl_mvm_sta_rx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
612 int tid, u16 ssn, bool start)
613 {
614 struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv;
615 struct iwl_mvm_add_sta_cmd cmd = {};
616 int ret;
617 u32 status;
618
619 lockdep_assert_held(&mvm->mutex);
620
621 cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color);
622 cmd.sta_id = mvm_sta->sta_id;
623 cmd.add_modify = STA_MODE_MODIFY;
624 cmd.add_immediate_ba_tid = (u8) tid;
625 cmd.add_immediate_ba_ssn = cpu_to_le16(ssn);
626 cmd.modify_mask = start ? STA_MODIFY_ADD_BA_TID :
627 STA_MODIFY_REMOVE_BA_TID;
628
629 status = ADD_STA_SUCCESS;
630 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, sizeof(cmd),
631 &cmd, &status);
632 if (ret)
633 return ret;
634
635 switch (status) {
636 case ADD_STA_SUCCESS:
637 IWL_DEBUG_INFO(mvm, "RX BA Session %sed in fw\n",
638 start ? "start" : "stopp");
639 break;
640 case ADD_STA_IMMEDIATE_BA_FAILURE:
641 IWL_WARN(mvm, "RX BA Session refused by fw\n");
642 ret = -ENOSPC;
643 break;
644 default:
645 ret = -EIO;
646 IWL_ERR(mvm, "RX BA Session failed %sing, status 0x%x\n",
647 start ? "start" : "stopp", status);
648 break;
649 }
650
651 return ret;
652 }
653
654 static int iwl_mvm_sta_tx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
655 int tid, u8 queue, bool start)
656 {
657 struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv;
658 struct iwl_mvm_add_sta_cmd cmd = {};
659 int ret;
660 u32 status;
661
662 lockdep_assert_held(&mvm->mutex);
663
664 if (start) {
665 mvm_sta->tfd_queue_msk |= BIT(queue);
666 mvm_sta->tid_disable_agg &= ~BIT(tid);
667 } else {
668 mvm_sta->tfd_queue_msk &= ~BIT(queue);
669 mvm_sta->tid_disable_agg |= BIT(tid);
670 }
671
672 cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color);
673 cmd.sta_id = mvm_sta->sta_id;
674 cmd.add_modify = STA_MODE_MODIFY;
675 cmd.modify_mask = STA_MODIFY_QUEUES | STA_MODIFY_TID_DISABLE_TX;
676 cmd.tfd_queue_msk = cpu_to_le32(mvm_sta->tfd_queue_msk);
677 cmd.tid_disable_tx = cpu_to_le16(mvm_sta->tid_disable_agg);
678
679 status = ADD_STA_SUCCESS;
680 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, sizeof(cmd),
681 &cmd, &status);
682 if (ret)
683 return ret;
684
685 switch (status) {
686 case ADD_STA_SUCCESS:
687 break;
688 default:
689 ret = -EIO;
690 IWL_ERR(mvm, "TX BA Session failed %sing, status 0x%x\n",
691 start ? "start" : "stopp", status);
692 break;
693 }
694
695 return ret;
696 }
697
698 static const u8 tid_to_ac[] = {
699 IEEE80211_AC_BE,
700 IEEE80211_AC_BK,
701 IEEE80211_AC_BK,
702 IEEE80211_AC_BE,
703 IEEE80211_AC_VI,
704 IEEE80211_AC_VI,
705 IEEE80211_AC_VO,
706 IEEE80211_AC_VO,
707 };
708
709 int iwl_mvm_sta_tx_agg_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
710 struct ieee80211_sta *sta, u16 tid, u16 *ssn)
711 {
712 struct iwl_mvm_sta *mvmsta = (void *)sta->drv_priv;
713 struct iwl_mvm_tid_data *tid_data;
714 int txq_id;
715
716 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
717 return -EINVAL;
718
719 if (mvmsta->tid_data[tid].state != IWL_AGG_OFF) {
720 IWL_ERR(mvm, "Start AGG when state is not IWL_AGG_OFF %d!\n",
721 mvmsta->tid_data[tid].state);
722 return -ENXIO;
723 }
724
725 lockdep_assert_held(&mvm->mutex);
726
727 for (txq_id = IWL_MVM_FIRST_AGG_QUEUE;
728 txq_id <= IWL_MVM_LAST_AGG_QUEUE; txq_id++)
729 if (mvm->queue_to_mac80211[txq_id] ==
730 IWL_INVALID_MAC80211_QUEUE)
731 break;
732
733 if (txq_id > IWL_MVM_LAST_AGG_QUEUE) {
734 IWL_ERR(mvm, "Failed to allocate agg queue\n");
735 return -EIO;
736 }
737
738 /* the new tx queue is still connected to the same mac80211 queue */
739 mvm->queue_to_mac80211[txq_id] = vif->hw_queue[tid_to_ac[tid]];
740
741 spin_lock_bh(&mvmsta->lock);
742 tid_data = &mvmsta->tid_data[tid];
743 tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
744 tid_data->txq_id = txq_id;
745 *ssn = tid_data->ssn;
746
747 IWL_DEBUG_TX_QUEUES(mvm,
748 "Start AGG: sta %d tid %d queue %d - ssn = %d, next_recl = %d\n",
749 mvmsta->sta_id, tid, txq_id, tid_data->ssn,
750 tid_data->next_reclaimed);
751
752 if (tid_data->ssn == tid_data->next_reclaimed) {
753 tid_data->state = IWL_AGG_STARTING;
754 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
755 } else {
756 tid_data->state = IWL_EMPTYING_HW_QUEUE_ADDBA;
757 }
758
759 spin_unlock_bh(&mvmsta->lock);
760
761 return 0;
762 }
763
764 int iwl_mvm_sta_tx_agg_oper(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
765 struct ieee80211_sta *sta, u16 tid, u8 buf_size)
766 {
767 struct iwl_mvm_sta *mvmsta = (void *)sta->drv_priv;
768 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
769 int queue, fifo, ret;
770 u16 ssn;
771
772 buf_size = min_t(int, buf_size, LINK_QUAL_AGG_FRAME_LIMIT_DEF);
773
774 spin_lock_bh(&mvmsta->lock);
775 ssn = tid_data->ssn;
776 queue = tid_data->txq_id;
777 tid_data->state = IWL_AGG_ON;
778 tid_data->ssn = 0xffff;
779 spin_unlock_bh(&mvmsta->lock);
780
781 fifo = iwl_mvm_ac_to_tx_fifo[tid_to_ac[tid]];
782
783 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true);
784 if (ret)
785 return -EIO;
786
787 iwl_trans_txq_enable(mvm->trans, queue, fifo, mvmsta->sta_id, tid,
788 buf_size, ssn);
789
790 /*
791 * Even though in theory the peer could have different
792 * aggregation reorder buffer sizes for different sessions,
793 * our ucode doesn't allow for that and has a global limit
794 * for each station. Therefore, use the minimum of all the
795 * aggregation sessions and our default value.
796 */
797 mvmsta->max_agg_bufsize =
798 min(mvmsta->max_agg_bufsize, buf_size);
799 mvmsta->lq_sta.lq.agg_frame_cnt_limit = mvmsta->max_agg_bufsize;
800
801 if (mvm->cfg->ht_params->use_rts_for_aggregation) {
802 /*
803 * switch to RTS/CTS if it is the prefer protection
804 * method for HT traffic
805 */
806 mvmsta->lq_sta.lq.flags |= LQ_FLAG_SET_STA_TLC_RTS_MSK;
807 /*
808 * TODO: remove the TLC_RTS flag when we tear down the last
809 * AGG session (agg_tids_count in DVM)
810 */
811 }
812
813 IWL_DEBUG_HT(mvm, "Tx aggregation enabled on ra = %pM tid = %d\n",
814 sta->addr, tid);
815
816 return iwl_mvm_send_lq_cmd(mvm, &mvmsta->lq_sta.lq, CMD_ASYNC, false);
817 }
818
819 int iwl_mvm_sta_tx_agg_stop(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
820 struct ieee80211_sta *sta, u16 tid)
821 {
822 struct iwl_mvm_sta *mvmsta = (void *)sta->drv_priv;
823 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
824 u16 txq_id;
825 int err;
826
827
828 /*
829 * If mac80211 is cleaning its state, then say that we finished since
830 * our state has been cleared anyway.
831 */
832 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
833 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
834 return 0;
835 }
836
837 spin_lock_bh(&mvmsta->lock);
838
839 txq_id = tid_data->txq_id;
840
841 IWL_DEBUG_TX_QUEUES(mvm, "Stop AGG: sta %d tid %d q %d state %d\n",
842 mvmsta->sta_id, tid, txq_id, tid_data->state);
843
844 switch (tid_data->state) {
845 case IWL_AGG_ON:
846 tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
847
848 IWL_DEBUG_TX_QUEUES(mvm,
849 "ssn = %d, next_recl = %d\n",
850 tid_data->ssn, tid_data->next_reclaimed);
851
852 /* There are still packets for this RA / TID in the HW */
853 if (tid_data->ssn != tid_data->next_reclaimed) {
854 tid_data->state = IWL_EMPTYING_HW_QUEUE_DELBA;
855 err = 0;
856 break;
857 }
858
859 tid_data->ssn = 0xffff;
860 iwl_trans_txq_disable(mvm->trans, txq_id);
861 /* fall through */
862 case IWL_AGG_STARTING:
863 case IWL_EMPTYING_HW_QUEUE_ADDBA:
864 /*
865 * The agg session has been stopped before it was set up. This
866 * can happen when the AddBA timer times out for example.
867 */
868
869 /* No barriers since we are under mutex */
870 lockdep_assert_held(&mvm->mutex);
871 mvm->queue_to_mac80211[txq_id] = IWL_INVALID_MAC80211_QUEUE;
872
873 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
874 tid_data->state = IWL_AGG_OFF;
875 err = 0;
876 break;
877 default:
878 IWL_ERR(mvm,
879 "Stopping AGG while state not ON or starting for %d on %d (%d)\n",
880 mvmsta->sta_id, tid, tid_data->state);
881 IWL_ERR(mvm,
882 "\ttid_data->txq_id = %d\n", tid_data->txq_id);
883 err = -EINVAL;
884 }
885
886 spin_unlock_bh(&mvmsta->lock);
887
888 return err;
889 }
890
891 int iwl_mvm_sta_tx_agg_flush(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
892 struct ieee80211_sta *sta, u16 tid)
893 {
894 struct iwl_mvm_sta *mvmsta = (void *)sta->drv_priv;
895 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
896 u16 txq_id;
897
898 /*
899 * First set the agg state to OFF to avoid calling
900 * ieee80211_stop_tx_ba_cb in iwl_mvm_check_ratid_empty.
901 */
902 spin_lock_bh(&mvmsta->lock);
903 txq_id = tid_data->txq_id;
904 IWL_DEBUG_TX_QUEUES(mvm, "Flush AGG: sta %d tid %d q %d state %d\n",
905 mvmsta->sta_id, tid, txq_id, tid_data->state);
906 tid_data->state = IWL_AGG_OFF;
907 spin_unlock_bh(&mvmsta->lock);
908
909 if (iwl_mvm_flush_tx_path(mvm, BIT(txq_id), true))
910 IWL_ERR(mvm, "Couldn't flush the AGG queue\n");
911
912 iwl_trans_txq_disable(mvm->trans, tid_data->txq_id);
913 mvm->queue_to_mac80211[tid_data->txq_id] =
914 IWL_INVALID_MAC80211_QUEUE;
915
916 return 0;
917 }
918
919 static int iwl_mvm_set_fw_key_idx(struct iwl_mvm *mvm)
920 {
921 int i;
922
923 lockdep_assert_held(&mvm->mutex);
924
925 i = find_first_zero_bit(mvm->fw_key_table, STA_KEY_MAX_NUM);
926
927 if (i == STA_KEY_MAX_NUM)
928 return STA_KEY_IDX_INVALID;
929
930 __set_bit(i, mvm->fw_key_table);
931
932 return i;
933 }
934
935 static u8 iwl_mvm_get_key_sta_id(struct ieee80211_vif *vif,
936 struct ieee80211_sta *sta)
937 {
938 struct iwl_mvm_vif *mvmvif = (void *)vif->drv_priv;
939
940 if (sta) {
941 struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv;
942
943 return mvm_sta->sta_id;
944 }
945
946 /*
947 * The device expects GTKs for station interfaces to be
948 * installed as GTKs for the AP station. If we have no
949 * station ID, then use AP's station ID.
950 */
951 if (vif->type == NL80211_IFTYPE_STATION &&
952 mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT)
953 return mvmvif->ap_sta_id;
954
955 return IWL_MVM_STATION_COUNT;
956 }
957
958 static int iwl_mvm_send_sta_key(struct iwl_mvm *mvm,
959 struct iwl_mvm_sta *mvm_sta,
960 struct ieee80211_key_conf *keyconf,
961 u8 sta_id, u32 tkip_iv32, u16 *tkip_p1k,
962 u32 cmd_flags)
963 {
964 __le16 key_flags;
965 struct iwl_mvm_add_sta_cmd cmd = {};
966 int ret, status;
967 u16 keyidx;
968 int i;
969
970 keyidx = (keyconf->keyidx << STA_KEY_FLG_KEYID_POS) &
971 STA_KEY_FLG_KEYID_MSK;
972 key_flags = cpu_to_le16(keyidx);
973 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_KEY_MAP);
974
975 switch (keyconf->cipher) {
976 case WLAN_CIPHER_SUITE_TKIP:
977 key_flags |= cpu_to_le16(STA_KEY_FLG_TKIP);
978 cmd.key.tkip_rx_tsc_byte2 = tkip_iv32;
979 for (i = 0; i < 5; i++)
980 cmd.key.tkip_rx_ttak[i] = cpu_to_le16(tkip_p1k[i]);
981 memcpy(cmd.key.key, keyconf->key, keyconf->keylen);
982 break;
983 case WLAN_CIPHER_SUITE_CCMP:
984 key_flags |= cpu_to_le16(STA_KEY_FLG_CCM);
985 memcpy(cmd.key.key, keyconf->key, keyconf->keylen);
986 break;
987 default:
988 WARN_ON(1);
989 return -EINVAL;
990 }
991
992 if (!(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE))
993 key_flags |= cpu_to_le16(STA_KEY_MULTICAST);
994
995 cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color);
996 cmd.key.key_offset = keyconf->hw_key_idx;
997 cmd.key.key_flags = key_flags;
998 cmd.add_modify = STA_MODE_MODIFY;
999 cmd.modify_mask = STA_MODIFY_KEY;
1000 cmd.sta_id = sta_id;
1001
1002 status = ADD_STA_SUCCESS;
1003 if (cmd_flags == CMD_SYNC)
1004 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, sizeof(cmd),
1005 &cmd, &status);
1006 else
1007 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC,
1008 sizeof(cmd), &cmd);
1009
1010 switch (status) {
1011 case ADD_STA_SUCCESS:
1012 IWL_DEBUG_WEP(mvm, "MODIFY_STA: set dynamic key passed\n");
1013 break;
1014 default:
1015 ret = -EIO;
1016 IWL_ERR(mvm, "MODIFY_STA: set dynamic key failed\n");
1017 break;
1018 }
1019
1020 return ret;
1021 }
1022
1023 static int iwl_mvm_send_sta_igtk(struct iwl_mvm *mvm,
1024 struct ieee80211_key_conf *keyconf,
1025 u8 sta_id, bool remove_key)
1026 {
1027 struct iwl_mvm_mgmt_mcast_key_cmd igtk_cmd = {};
1028
1029 /* verify the key details match the required command's expectations */
1030 if (WARN_ON((keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC) ||
1031 (keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE) ||
1032 (keyconf->keyidx != 4 && keyconf->keyidx != 5)))
1033 return -EINVAL;
1034
1035 igtk_cmd.key_id = cpu_to_le32(keyconf->keyidx);
1036 igtk_cmd.sta_id = cpu_to_le32(sta_id);
1037
1038 if (remove_key) {
1039 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_NOT_VALID);
1040 } else {
1041 struct ieee80211_key_seq seq;
1042 const u8 *pn;
1043
1044 memcpy(igtk_cmd.IGTK, keyconf->key, keyconf->keylen);
1045 ieee80211_aes_cmac_calculate_k1_k2(keyconf,
1046 igtk_cmd.K1, igtk_cmd.K2);
1047 ieee80211_get_key_rx_seq(keyconf, 0, &seq);
1048 pn = seq.aes_cmac.pn;
1049 igtk_cmd.receive_seq_cnt = cpu_to_le64(((u64) pn[5] << 0) |
1050 ((u64) pn[4] << 8) |
1051 ((u64) pn[3] << 16) |
1052 ((u64) pn[2] << 24) |
1053 ((u64) pn[1] << 32) |
1054 ((u64) pn[0] << 40));
1055 }
1056
1057 IWL_DEBUG_INFO(mvm, "%s igtk for sta %u\n",
1058 remove_key ? "removing" : "installing",
1059 igtk_cmd.sta_id);
1060
1061 return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, CMD_SYNC,
1062 sizeof(igtk_cmd), &igtk_cmd);
1063 }
1064
1065
1066 static inline u8 *iwl_mvm_get_mac_addr(struct iwl_mvm *mvm,
1067 struct ieee80211_vif *vif,
1068 struct ieee80211_sta *sta)
1069 {
1070 struct iwl_mvm_vif *mvmvif = (void *)vif->drv_priv;
1071
1072 if (sta)
1073 return sta->addr;
1074
1075 if (vif->type == NL80211_IFTYPE_STATION &&
1076 mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT) {
1077 u8 sta_id = mvmvif->ap_sta_id;
1078 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
1079 lockdep_is_held(&mvm->mutex));
1080 return sta->addr;
1081 }
1082
1083
1084 return NULL;
1085 }
1086
1087 int iwl_mvm_set_sta_key(struct iwl_mvm *mvm,
1088 struct ieee80211_vif *vif,
1089 struct ieee80211_sta *sta,
1090 struct ieee80211_key_conf *keyconf,
1091 bool have_key_offset)
1092 {
1093 struct iwl_mvm_sta *mvm_sta;
1094 int ret;
1095 u8 *addr, sta_id;
1096 struct ieee80211_key_seq seq;
1097 u16 p1k[5];
1098
1099 lockdep_assert_held(&mvm->mutex);
1100
1101 /* Get the station id from the mvm local station table */
1102 sta_id = iwl_mvm_get_key_sta_id(vif, sta);
1103 if (sta_id == IWL_MVM_STATION_COUNT) {
1104 IWL_ERR(mvm, "Failed to find station id\n");
1105 return -EINVAL;
1106 }
1107
1108 if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC) {
1109 ret = iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, false);
1110 goto end;
1111 }
1112
1113 /*
1114 * It is possible that the 'sta' parameter is NULL, and thus
1115 * there is a need to retrieve the sta from the local station table.
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 (IS_ERR_OR_NULL(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 if (!have_key_offset) {
1131 /*
1132 * The D3 firmware hardcodes the PTK offset to 0, so we have to
1133 * configure it there. As a result, this workaround exists to
1134 * let the caller set the key offset (hw_key_idx), see d3.c.
1135 */
1136 keyconf->hw_key_idx = iwl_mvm_set_fw_key_idx(mvm);
1137 if (keyconf->hw_key_idx == STA_KEY_IDX_INVALID)
1138 return -ENOSPC;
1139 }
1140
1141 switch (keyconf->cipher) {
1142 case WLAN_CIPHER_SUITE_TKIP:
1143 addr = iwl_mvm_get_mac_addr(mvm, vif, sta);
1144 /* get phase 1 key from mac80211 */
1145 ieee80211_get_key_rx_seq(keyconf, 0, &seq);
1146 ieee80211_get_tkip_rx_p1k(keyconf, addr, seq.tkip.iv32, p1k);
1147 ret = iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, sta_id,
1148 seq.tkip.iv32, p1k, CMD_SYNC);
1149 break;
1150 case WLAN_CIPHER_SUITE_CCMP:
1151 ret = iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, sta_id,
1152 0, NULL, CMD_SYNC);
1153 break;
1154 default:
1155 IWL_ERR(mvm, "Unknown cipher %x\n", keyconf->cipher);
1156 ret = -EINVAL;
1157 }
1158
1159 if (ret)
1160 __clear_bit(keyconf->hw_key_idx, mvm->fw_key_table);
1161
1162 end:
1163 IWL_DEBUG_WEP(mvm, "key: cipher=%x len=%d idx=%d sta=%pM ret=%d\n",
1164 keyconf->cipher, keyconf->keylen, keyconf->keyidx,
1165 sta->addr, ret);
1166 return ret;
1167 }
1168
1169 int iwl_mvm_remove_sta_key(struct iwl_mvm *mvm,
1170 struct ieee80211_vif *vif,
1171 struct ieee80211_sta *sta,
1172 struct ieee80211_key_conf *keyconf)
1173 {
1174 struct iwl_mvm_sta *mvm_sta;
1175 struct iwl_mvm_add_sta_cmd cmd = {};
1176 __le16 key_flags;
1177 int ret, status;
1178 u8 sta_id;
1179
1180 lockdep_assert_held(&mvm->mutex);
1181
1182 /* Get the station id from the mvm local station table */
1183 sta_id = iwl_mvm_get_key_sta_id(vif, sta);
1184
1185 IWL_DEBUG_WEP(mvm, "mvm remove dynamic key: idx=%d sta=%d\n",
1186 keyconf->keyidx, sta_id);
1187
1188 if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC)
1189 return iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, true);
1190
1191 ret = __test_and_clear_bit(keyconf->hw_key_idx, mvm->fw_key_table);
1192 if (!ret) {
1193 IWL_ERR(mvm, "offset %d not used in fw key table.\n",
1194 keyconf->hw_key_idx);
1195 return -ENOENT;
1196 }
1197
1198 if (sta_id == IWL_MVM_STATION_COUNT) {
1199 IWL_DEBUG_WEP(mvm, "station non-existent, early return.\n");
1200 return 0;
1201 }
1202
1203 /*
1204 * It is possible that the 'sta' parameter is NULL, and thus
1205 * there is a need to retrieve the sta from the local station table,
1206 * for example when a GTK is removed (where the sta_id will then be
1207 * the AP ID, and no station was passed by mac80211.)
1208 */
1209 if (!sta) {
1210 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
1211 lockdep_is_held(&mvm->mutex));
1212 if (!sta) {
1213 IWL_ERR(mvm, "Invalid station id\n");
1214 return -EINVAL;
1215 }
1216 }
1217
1218 mvm_sta = (struct iwl_mvm_sta *)sta->drv_priv;
1219 if (WARN_ON_ONCE(mvm_sta->vif != vif))
1220 return -EINVAL;
1221
1222 key_flags = cpu_to_le16((keyconf->keyidx << STA_KEY_FLG_KEYID_POS) &
1223 STA_KEY_FLG_KEYID_MSK);
1224 key_flags |= cpu_to_le16(STA_KEY_FLG_NO_ENC | STA_KEY_FLG_WEP_KEY_MAP);
1225 key_flags |= cpu_to_le16(STA_KEY_NOT_VALID);
1226
1227 if (!(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE))
1228 key_flags |= cpu_to_le16(STA_KEY_MULTICAST);
1229
1230 cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color);
1231 cmd.key.key_flags = key_flags;
1232 cmd.key.key_offset = keyconf->hw_key_idx;
1233 cmd.sta_id = sta_id;
1234
1235 cmd.modify_mask = STA_MODIFY_KEY;
1236 cmd.add_modify = STA_MODE_MODIFY;
1237
1238 status = ADD_STA_SUCCESS;
1239 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, sizeof(cmd),
1240 &cmd, &status);
1241
1242 switch (status) {
1243 case ADD_STA_SUCCESS:
1244 IWL_DEBUG_WEP(mvm, "MODIFY_STA: remove sta key passed\n");
1245 break;
1246 default:
1247 ret = -EIO;
1248 IWL_ERR(mvm, "MODIFY_STA: remove sta key failed\n");
1249 break;
1250 }
1251
1252 return ret;
1253 }
1254
1255 void iwl_mvm_update_tkip_key(struct iwl_mvm *mvm,
1256 struct ieee80211_vif *vif,
1257 struct ieee80211_key_conf *keyconf,
1258 struct ieee80211_sta *sta, u32 iv32,
1259 u16 *phase1key)
1260 {
1261 struct iwl_mvm_sta *mvm_sta;
1262 u8 sta_id = iwl_mvm_get_key_sta_id(vif, sta);
1263
1264 if (WARN_ON_ONCE(sta_id == IWL_MVM_STATION_COUNT))
1265 return;
1266
1267 rcu_read_lock();
1268
1269 if (!sta) {
1270 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
1271 if (WARN_ON(IS_ERR_OR_NULL(sta))) {
1272 rcu_read_unlock();
1273 return;
1274 }
1275 }
1276
1277 mvm_sta = (void *)sta->drv_priv;
1278 iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, sta_id,
1279 iv32, phase1key, CMD_ASYNC);
1280 rcu_read_unlock();
1281 }
1282
1283 void iwl_mvm_sta_modify_ps_wake(struct iwl_mvm *mvm,
1284 struct ieee80211_sta *sta)
1285 {
1286 struct iwl_mvm_sta *mvmsta = (void *)sta->drv_priv;
1287 struct iwl_mvm_add_sta_cmd cmd = {
1288 .add_modify = STA_MODE_MODIFY,
1289 .sta_id = mvmsta->sta_id,
1290 .modify_mask = STA_MODIFY_SLEEPING_STA_TX_COUNT,
1291 .sleep_state_flags = cpu_to_le16(STA_SLEEP_STATE_AWAKE),
1292 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
1293 };
1294 int ret;
1295
1296 /*
1297 * Same modify mask for sleep_tx_count and sleep_state_flags but this
1298 * should be fine since if we set the STA as "awake", then
1299 * sleep_tx_count is not relevant.
1300 */
1301 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC, sizeof(cmd), &cmd);
1302 if (ret)
1303 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
1304 }
1305
1306 void iwl_mvm_sta_modify_sleep_tx_count(struct iwl_mvm *mvm,
1307 struct ieee80211_sta *sta,
1308 enum ieee80211_frame_release_type reason,
1309 u16 cnt)
1310 {
1311 u16 sleep_state_flags =
1312 (reason == IEEE80211_FRAME_RELEASE_UAPSD) ?
1313 STA_SLEEP_STATE_UAPSD : STA_SLEEP_STATE_PS_POLL;
1314 struct iwl_mvm_sta *mvmsta = (void *)sta->drv_priv;
1315 struct iwl_mvm_add_sta_cmd cmd = {
1316 .add_modify = STA_MODE_MODIFY,
1317 .sta_id = mvmsta->sta_id,
1318 .modify_mask = STA_MODIFY_SLEEPING_STA_TX_COUNT,
1319 .sleep_tx_count = cpu_to_le16(cnt),
1320 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
1321 /*
1322 * Same modify mask for sleep_tx_count and sleep_state_flags so
1323 * we must set the sleep_state_flags too.
1324 */
1325 .sleep_state_flags = cpu_to_le16(sleep_state_flags),
1326 };
1327 int ret;
1328
1329 /* TODO: somehow the fw doesn't seem to take PS_POLL into account */
1330 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC, sizeof(cmd), &cmd);
1331 if (ret)
1332 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
1333 }
kernel source for telekom puls (alcatel/mediatek)