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fix a kmap leak in virtio_console
[linux/fpc-iii.git] / drivers / net / wireless / iwlwifi / mvm / sta.c
blobec1812133235d8834ab5a235b66794e20d6a9bbd
1 /******************************************************************************
2 *
3 * This file is provided under a dual BSD/GPLv2 license. When using or
4 * redistributing this file, you may do so under either license.
5 *
6 * GPL LICENSE SUMMARY
7 *
8 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
9 *
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 - 2014 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 #include "rs.h"
68
69 static void iwl_mvm_add_sta_cmd_v6_to_v5(struct iwl_mvm_add_sta_cmd_v6 *cmd_v6,
70 struct iwl_mvm_add_sta_cmd_v5 *cmd_v5)
71 {
72 memset(cmd_v5, 0, sizeof(*cmd_v5));
73
74 cmd_v5->add_modify = cmd_v6->add_modify;
75 cmd_v5->tid_disable_tx = cmd_v6->tid_disable_tx;
76 cmd_v5->mac_id_n_color = cmd_v6->mac_id_n_color;
77 memcpy(cmd_v5->addr, cmd_v6->addr, ETH_ALEN);
78 cmd_v5->sta_id = cmd_v6->sta_id;
79 cmd_v5->modify_mask = cmd_v6->modify_mask;
80 cmd_v5->station_flags = cmd_v6->station_flags;
81 cmd_v5->station_flags_msk = cmd_v6->station_flags_msk;
82 cmd_v5->add_immediate_ba_tid = cmd_v6->add_immediate_ba_tid;
83 cmd_v5->remove_immediate_ba_tid = cmd_v6->remove_immediate_ba_tid;
84 cmd_v5->add_immediate_ba_ssn = cmd_v6->add_immediate_ba_ssn;
85 cmd_v5->sleep_tx_count = cmd_v6->sleep_tx_count;
86 cmd_v5->sleep_state_flags = cmd_v6->sleep_state_flags;
87 cmd_v5->assoc_id = cmd_v6->assoc_id;
88 cmd_v5->beamform_flags = cmd_v6->beamform_flags;
89 cmd_v5->tfd_queue_msk = cmd_v6->tfd_queue_msk;
90 }
91
92 static void
93 iwl_mvm_add_sta_key_to_add_sta_cmd_v5(struct iwl_mvm_add_sta_key_cmd *key_cmd,
94 struct iwl_mvm_add_sta_cmd_v5 *sta_cmd,
95 u32 mac_id_n_color)
96 {
97 memset(sta_cmd, 0, sizeof(*sta_cmd));
98
99 sta_cmd->sta_id = key_cmd->sta_id;
100 sta_cmd->add_modify = STA_MODE_MODIFY;
101 sta_cmd->modify_mask = STA_MODIFY_KEY;
102 sta_cmd->mac_id_n_color = cpu_to_le32(mac_id_n_color);
103
104 sta_cmd->key.key_offset = key_cmd->key_offset;
105 sta_cmd->key.key_flags = key_cmd->key_flags;
106 memcpy(sta_cmd->key.key, key_cmd->key, sizeof(sta_cmd->key.key));
107 sta_cmd->key.tkip_rx_tsc_byte2 = key_cmd->tkip_rx_tsc_byte2;
108 memcpy(sta_cmd->key.tkip_rx_ttak, key_cmd->tkip_rx_ttak,
109 sizeof(sta_cmd->key.tkip_rx_ttak));
110 }
111
112 static int iwl_mvm_send_add_sta_cmd_status(struct iwl_mvm *mvm,
113 struct iwl_mvm_add_sta_cmd_v6 *cmd,
114 int *status)
115 {
116 struct iwl_mvm_add_sta_cmd_v5 cmd_v5;
117
118 if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_STA_KEY_CMD)
119 return iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, sizeof(*cmd),
120 cmd, status);
121
122 iwl_mvm_add_sta_cmd_v6_to_v5(cmd, &cmd_v5);
123
124 return iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, sizeof(cmd_v5),
125 &cmd_v5, status);
126 }
127
128 static int iwl_mvm_send_add_sta_cmd(struct iwl_mvm *mvm, u32 flags,
129 struct iwl_mvm_add_sta_cmd_v6 *cmd)
130 {
131 struct iwl_mvm_add_sta_cmd_v5 cmd_v5;
132
133 if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_STA_KEY_CMD)
134 return iwl_mvm_send_cmd_pdu(mvm, ADD_STA, flags,
135 sizeof(*cmd), cmd);
136
137 iwl_mvm_add_sta_cmd_v6_to_v5(cmd, &cmd_v5);
138
139 return iwl_mvm_send_cmd_pdu(mvm, ADD_STA, flags, sizeof(cmd_v5),
140 &cmd_v5);
141 }
142
143 static int
144 iwl_mvm_send_add_sta_key_cmd_status(struct iwl_mvm *mvm,
145 struct iwl_mvm_add_sta_key_cmd *cmd,
146 u32 mac_id_n_color,
147 int *status)
148 {
149 struct iwl_mvm_add_sta_cmd_v5 sta_cmd;
150
151 if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_STA_KEY_CMD)
152 return iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY,
153 sizeof(*cmd), cmd, status);
154
155 iwl_mvm_add_sta_key_to_add_sta_cmd_v5(cmd, &sta_cmd, mac_id_n_color);
156
157 return iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, sizeof(sta_cmd),
158 &sta_cmd, status);
159 }
160
161 static int iwl_mvm_send_add_sta_key_cmd(struct iwl_mvm *mvm,
162 u32 flags,
163 struct iwl_mvm_add_sta_key_cmd *cmd,
164 u32 mac_id_n_color)
165 {
166 struct iwl_mvm_add_sta_cmd_v5 sta_cmd;
167
168 if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_STA_KEY_CMD)
169 return iwl_mvm_send_cmd_pdu(mvm, ADD_STA_KEY, flags,
170 sizeof(*cmd), cmd);
171
172 iwl_mvm_add_sta_key_to_add_sta_cmd_v5(cmd, &sta_cmd, mac_id_n_color);
173
174 return iwl_mvm_send_cmd_pdu(mvm, ADD_STA, flags, sizeof(sta_cmd),
175 &sta_cmd);
176 }
177
178 static int iwl_mvm_find_free_sta_id(struct iwl_mvm *mvm)
179 {
180 int sta_id;
181
182 WARN_ON_ONCE(test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status));
183
184 lockdep_assert_held(&mvm->mutex);
185
186 /* Don't take rcu_read_lock() since we are protected by mvm->mutex */
187 for (sta_id = 0; sta_id < IWL_MVM_STATION_COUNT; sta_id++)
188 if (!rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
189 lockdep_is_held(&mvm->mutex)))
190 return sta_id;
191 return IWL_MVM_STATION_COUNT;
192 }
193
194 /* send station add/update command to firmware */
195 int iwl_mvm_sta_send_to_fw(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
196 bool update)
197 {
198 struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv;
199 struct iwl_mvm_add_sta_cmd_v6 add_sta_cmd;
200 int ret;
201 u32 status;
202 u32 agg_size = 0, mpdu_dens = 0;
203
204 memset(&add_sta_cmd, 0, sizeof(add_sta_cmd));
205
206 add_sta_cmd.sta_id = mvm_sta->sta_id;
207 add_sta_cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color);
208 if (!update) {
209 add_sta_cmd.tfd_queue_msk = cpu_to_le32(mvm_sta->tfd_queue_msk);
210 memcpy(&add_sta_cmd.addr, sta->addr, ETH_ALEN);
211 }
212 add_sta_cmd.add_modify = update ? 1 : 0;
213
214 add_sta_cmd.station_flags_msk |= cpu_to_le32(STA_FLG_FAT_EN_MSK |
215 STA_FLG_MIMO_EN_MSK);
216
217 switch (sta->bandwidth) {
218 case IEEE80211_STA_RX_BW_160:
219 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_160MHZ);
220 /* fall through */
221 case IEEE80211_STA_RX_BW_80:
222 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_80MHZ);
223 /* fall through */
224 case IEEE80211_STA_RX_BW_40:
225 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_40MHZ);
226 /* fall through */
227 case IEEE80211_STA_RX_BW_20:
228 if (sta->ht_cap.ht_supported)
229 add_sta_cmd.station_flags |=
230 cpu_to_le32(STA_FLG_FAT_EN_20MHZ);
231 break;
232 }
233
234 switch (sta->rx_nss) {
235 case 1:
236 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_SISO);
237 break;
238 case 2:
239 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_MIMO2);
240 break;
241 case 3 ... 8:
242 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_MIMO3);
243 break;
244 }
245
246 switch (sta->smps_mode) {
247 case IEEE80211_SMPS_AUTOMATIC:
248 case IEEE80211_SMPS_NUM_MODES:
249 WARN_ON(1);
250 break;
251 case IEEE80211_SMPS_STATIC:
252 /* override NSS */
253 add_sta_cmd.station_flags &= ~cpu_to_le32(STA_FLG_MIMO_EN_MSK);
254 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_SISO);
255 break;
256 case IEEE80211_SMPS_DYNAMIC:
257 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_RTS_MIMO_PROT);
258 break;
259 case IEEE80211_SMPS_OFF:
260 /* nothing */
261 break;
262 }
263
264 if (sta->ht_cap.ht_supported) {
265 add_sta_cmd.station_flags_msk |=
266 cpu_to_le32(STA_FLG_MAX_AGG_SIZE_MSK |
267 STA_FLG_AGG_MPDU_DENS_MSK);
268
269 mpdu_dens = sta->ht_cap.ampdu_density;
270 }
271
272 if (sta->vht_cap.vht_supported) {
273 agg_size = sta->vht_cap.cap &
274 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK;
275 agg_size >>=
276 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_SHIFT;
277 } else if (sta->ht_cap.ht_supported) {
278 agg_size = sta->ht_cap.ampdu_factor;
279 }
280
281 add_sta_cmd.station_flags |=
282 cpu_to_le32(agg_size << STA_FLG_MAX_AGG_SIZE_SHIFT);
283 add_sta_cmd.station_flags |=
284 cpu_to_le32(mpdu_dens << STA_FLG_AGG_MPDU_DENS_SHIFT);
285
286 status = ADD_STA_SUCCESS;
287 ret = iwl_mvm_send_add_sta_cmd_status(mvm, &add_sta_cmd, &status);
288 if (ret)
289 return ret;
290
291 switch (status) {
292 case ADD_STA_SUCCESS:
293 IWL_DEBUG_ASSOC(mvm, "ADD_STA PASSED\n");
294 break;
295 default:
296 ret = -EIO;
297 IWL_ERR(mvm, "ADD_STA failed\n");
298 break;
299 }
300
301 return ret;
302 }
303
304 int iwl_mvm_add_sta(struct iwl_mvm *mvm,
305 struct ieee80211_vif *vif,
306 struct ieee80211_sta *sta)
307 {
308 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
309 struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv;
310 int i, ret, sta_id;
311
312 lockdep_assert_held(&mvm->mutex);
313
314 if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
315 sta_id = iwl_mvm_find_free_sta_id(mvm);
316 else
317 sta_id = mvm_sta->sta_id;
318
319 if (WARN_ON_ONCE(sta_id == IWL_MVM_STATION_COUNT))
320 return -ENOSPC;
321
322 spin_lock_init(&mvm_sta->lock);
323
324 mvm_sta->sta_id = sta_id;
325 mvm_sta->mac_id_n_color = FW_CMD_ID_AND_COLOR(mvmvif->id,
326 mvmvif->color);
327 mvm_sta->vif = vif;
328 mvm_sta->max_agg_bufsize = LINK_QUAL_AGG_FRAME_LIMIT_DEF;
329 mvm_sta->tx_protection = 0;
330 mvm_sta->tt_tx_protection = false;
331
332 /* HW restart, don't assume the memory has been zeroed */
333 atomic_set(&mvm->pending_frames[sta_id], 0);
334 mvm_sta->tid_disable_agg = 0;
335 mvm_sta->tfd_queue_msk = 0;
336 for (i = 0; i < IEEE80211_NUM_ACS; i++)
337 if (vif->hw_queue[i] != IEEE80211_INVAL_HW_QUEUE)
338 mvm_sta->tfd_queue_msk |= BIT(vif->hw_queue[i]);
339
340 /* for HW restart - reset everything but the sequence number */
341 for (i = 0; i < IWL_MAX_TID_COUNT; i++) {
342 u16 seq = mvm_sta->tid_data[i].seq_number;
343 memset(&mvm_sta->tid_data[i], 0, sizeof(mvm_sta->tid_data[i]));
344 mvm_sta->tid_data[i].seq_number = seq;
345 }
346
347 ret = iwl_mvm_sta_send_to_fw(mvm, sta, false);
348 if (ret)
349 return ret;
350
351 /* The first station added is the AP, the others are TDLS STAs */
352 if (vif->type == NL80211_IFTYPE_STATION &&
353 mvmvif->ap_sta_id == IWL_MVM_STATION_COUNT)
354 mvmvif->ap_sta_id = sta_id;
355
356 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta_id], sta);
357
358 return 0;
359 }
360
361 int iwl_mvm_update_sta(struct iwl_mvm *mvm,
362 struct ieee80211_vif *vif,
363 struct ieee80211_sta *sta)
364 {
365 return iwl_mvm_sta_send_to_fw(mvm, sta, true);
366 }
367
368 int iwl_mvm_drain_sta(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta,
369 bool drain)
370 {
371 struct iwl_mvm_add_sta_cmd_v6 cmd = {};
372 int ret;
373 u32 status;
374
375 lockdep_assert_held(&mvm->mutex);
376
377 cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color);
378 cmd.sta_id = mvmsta->sta_id;
379 cmd.add_modify = STA_MODE_MODIFY;
380 cmd.station_flags = drain ? cpu_to_le32(STA_FLG_DRAIN_FLOW) : 0;
381 cmd.station_flags_msk = cpu_to_le32(STA_FLG_DRAIN_FLOW);
382
383 status = ADD_STA_SUCCESS;
384 ret = iwl_mvm_send_add_sta_cmd_status(mvm, &cmd, &status);
385 if (ret)
386 return ret;
387
388 switch (status) {
389 case ADD_STA_SUCCESS:
390 IWL_DEBUG_INFO(mvm, "Frames for staid %d will drained in fw\n",
391 mvmsta->sta_id);
392 break;
393 default:
394 ret = -EIO;
395 IWL_ERR(mvm, "Couldn't drain frames for staid %d\n",
396 mvmsta->sta_id);
397 break;
398 }
399
400 return ret;
401 }
402
403 /*
404 * Remove a station from the FW table. Before sending the command to remove
405 * the station validate that the station is indeed known to the driver (sanity
406 * only).
407 */
408 static int iwl_mvm_rm_sta_common(struct iwl_mvm *mvm, u8 sta_id)
409 {
410 struct ieee80211_sta *sta;
411 struct iwl_mvm_rm_sta_cmd rm_sta_cmd = {
412 .sta_id = sta_id,
413 };
414 int ret;
415
416 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
417 lockdep_is_held(&mvm->mutex));
418
419 /* Note: internal stations are marked as error values */
420 if (!sta) {
421 IWL_ERR(mvm, "Invalid station id\n");
422 return -EINVAL;
423 }
424
425 ret = iwl_mvm_send_cmd_pdu(mvm, REMOVE_STA, CMD_SYNC,
426 sizeof(rm_sta_cmd), &rm_sta_cmd);
427 if (ret) {
428 IWL_ERR(mvm, "Failed to remove station. Id=%d\n", sta_id);
429 return ret;
430 }
431
432 return 0;
433 }
434
435 void iwl_mvm_sta_drained_wk(struct work_struct *wk)
436 {
437 struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm, sta_drained_wk);
438 u8 sta_id;
439
440 /*
441 * The mutex is needed because of the SYNC cmd, but not only: if the
442 * work would run concurrently with iwl_mvm_rm_sta, it would run before
443 * iwl_mvm_rm_sta sets the station as busy, and exit. Then
444 * iwl_mvm_rm_sta would set the station as busy, and nobody will clean
445 * that later.
446 */
447 mutex_lock(&mvm->mutex);
448
449 for_each_set_bit(sta_id, mvm->sta_drained, IWL_MVM_STATION_COUNT) {
450 int ret;
451 struct ieee80211_sta *sta =
452 rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
453 lockdep_is_held(&mvm->mutex));
454
455 /*
456 * This station is in use or RCU-removed; the latter happens in
457 * managed mode, where mac80211 removes the station before we
458 * can remove it from firmware (we can only do that after the
459 * MAC is marked unassociated), and possibly while the deauth
460 * frame to disconnect from the AP is still queued. Then, the
461 * station pointer is -ENOENT when the last skb is reclaimed.
462 */
463 if (!IS_ERR(sta) || PTR_ERR(sta) == -ENOENT)
464 continue;
465
466 if (PTR_ERR(sta) == -EINVAL) {
467 IWL_ERR(mvm, "Drained sta %d, but it is internal?\n",
468 sta_id);
469 continue;
470 }
471
472 if (!sta) {
473 IWL_ERR(mvm, "Drained sta %d, but it was NULL?\n",
474 sta_id);
475 continue;
476 }
477
478 WARN_ON(PTR_ERR(sta) != -EBUSY);
479 /* This station was removed and we waited until it got drained,
480 * we can now proceed and remove it.
481 */
482 ret = iwl_mvm_rm_sta_common(mvm, sta_id);
483 if (ret) {
484 IWL_ERR(mvm,
485 "Couldn't remove sta %d after it was drained\n",
486 sta_id);
487 continue;
488 }
489 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta_id], NULL);
490 clear_bit(sta_id, mvm->sta_drained);
491 }
492
493 mutex_unlock(&mvm->mutex);
494 }
495
496 int iwl_mvm_rm_sta(struct iwl_mvm *mvm,
497 struct ieee80211_vif *vif,
498 struct ieee80211_sta *sta)
499 {
500 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
501 struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv;
502 int ret;
503
504 lockdep_assert_held(&mvm->mutex);
505
506 if (vif->type == NL80211_IFTYPE_STATION &&
507 mvmvif->ap_sta_id == mvm_sta->sta_id) {
508 /* flush its queues here since we are freeing mvm_sta */
509 ret = iwl_mvm_flush_tx_path(mvm, mvm_sta->tfd_queue_msk, true);
510
511 /*
512 * Put a non-NULL since the fw station isn't removed.
513 * It will be removed after the MAC will be set as
514 * unassoc.
515 */
516 rcu_assign_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id],
517 ERR_PTR(-EINVAL));
518
519 /* if we are associated - we can't remove the AP STA now */
520 if (vif->bss_conf.assoc)
521 return ret;
522
523 /* unassoc - go ahead - remove the AP STA now */
524 mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
525 }
526
527 /*
528 * Make sure that the tx response code sees the station as -EBUSY and
529 * calls the drain worker.
530 */
531 spin_lock_bh(&mvm_sta->lock);
532 /*
533 * There are frames pending on the AC queues for this station.
534 * We need to wait until all the frames are drained...
535 */
536 if (atomic_read(&mvm->pending_frames[mvm_sta->sta_id])) {
537 rcu_assign_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id],
538 ERR_PTR(-EBUSY));
539 spin_unlock_bh(&mvm_sta->lock);
540 ret = iwl_mvm_drain_sta(mvm, mvm_sta, true);
541 } else {
542 spin_unlock_bh(&mvm_sta->lock);
543 ret = iwl_mvm_rm_sta_common(mvm, mvm_sta->sta_id);
544 rcu_assign_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id], NULL);
545 }
546
547 return ret;
548 }
549
550 int iwl_mvm_rm_sta_id(struct iwl_mvm *mvm,
551 struct ieee80211_vif *vif,
552 u8 sta_id)
553 {
554 int ret = iwl_mvm_rm_sta_common(mvm, sta_id);
555
556 lockdep_assert_held(&mvm->mutex);
557
558 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta_id], NULL);
559 return ret;
560 }
561
562 int iwl_mvm_allocate_int_sta(struct iwl_mvm *mvm, struct iwl_mvm_int_sta *sta,
563 u32 qmask)
564 {
565 if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
566 sta->sta_id = iwl_mvm_find_free_sta_id(mvm);
567 if (WARN_ON_ONCE(sta->sta_id == IWL_MVM_STATION_COUNT))
568 return -ENOSPC;
569 }
570
571 sta->tfd_queue_msk = qmask;
572
573 /* put a non-NULL value so iterating over the stations won't stop */
574 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta->sta_id], ERR_PTR(-EINVAL));
575 return 0;
576 }
577
578 void iwl_mvm_dealloc_int_sta(struct iwl_mvm *mvm, struct iwl_mvm_int_sta *sta)
579 {
580 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta->sta_id], NULL);
581 memset(sta, 0, sizeof(struct iwl_mvm_int_sta));
582 sta->sta_id = IWL_MVM_STATION_COUNT;
583 }
584
585 static int iwl_mvm_add_int_sta_common(struct iwl_mvm *mvm,
586 struct iwl_mvm_int_sta *sta,
587 const u8 *addr,
588 u16 mac_id, u16 color)
589 {
590 struct iwl_mvm_add_sta_cmd_v6 cmd;
591 int ret;
592 u32 status;
593
594 lockdep_assert_held(&mvm->mutex);
595
596 memset(&cmd, 0, sizeof(struct iwl_mvm_add_sta_cmd_v6));
597 cmd.sta_id = sta->sta_id;
598 cmd.mac_id_n_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(mac_id,
599 color));
600
601 cmd.tfd_queue_msk = cpu_to_le32(sta->tfd_queue_msk);
602
603 if (addr)
604 memcpy(cmd.addr, addr, ETH_ALEN);
605
606 ret = iwl_mvm_send_add_sta_cmd_status(mvm, &cmd, &status);
607 if (ret)
608 return ret;
609
610 switch (status) {
611 case ADD_STA_SUCCESS:
612 IWL_DEBUG_INFO(mvm, "Internal station added.\n");
613 return 0;
614 default:
615 ret = -EIO;
616 IWL_ERR(mvm, "Add internal station failed, status=0x%x\n",
617 status);
618 break;
619 }
620 return ret;
621 }
622
623 int iwl_mvm_add_aux_sta(struct iwl_mvm *mvm)
624 {
625 int ret;
626
627 lockdep_assert_held(&mvm->mutex);
628
629 /* Add the aux station, but without any queues */
630 ret = iwl_mvm_allocate_int_sta(mvm, &mvm->aux_sta, 0);
631 if (ret)
632 return ret;
633
634 ret = iwl_mvm_add_int_sta_common(mvm, &mvm->aux_sta, NULL,
635 MAC_INDEX_AUX, 0);
636
637 if (ret)
638 iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta);
639 return ret;
640 }
641
642 /*
643 * Send the add station command for the vif's broadcast station.
644 * Assumes that the station was already allocated.
645 *
646 * @mvm: the mvm component
647 * @vif: the interface to which the broadcast station is added
648 * @bsta: the broadcast station to add.
649 */
650 int iwl_mvm_send_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
651 struct iwl_mvm_int_sta *bsta)
652 {
653 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
654 static const u8 _baddr[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
655 static const u8 *baddr = _baddr;
656
657 lockdep_assert_held(&mvm->mutex);
658
659 if (vif->type == NL80211_IFTYPE_ADHOC)
660 baddr = vif->bss_conf.bssid;
661
662 if (WARN_ON_ONCE(bsta->sta_id == IWL_MVM_STATION_COUNT))
663 return -ENOSPC;
664
665 return iwl_mvm_add_int_sta_common(mvm, bsta, baddr,
666 mvmvif->id, mvmvif->color);
667 }
668
669 /* Send the FW a request to remove the station from it's internal data
670 * structures, but DO NOT remove the entry from the local data structures. */
671 int iwl_mvm_send_rm_bcast_sta(struct iwl_mvm *mvm,
672 struct iwl_mvm_int_sta *bsta)
673 {
674 int ret;
675
676 lockdep_assert_held(&mvm->mutex);
677
678 ret = iwl_mvm_rm_sta_common(mvm, bsta->sta_id);
679 if (ret)
680 IWL_WARN(mvm, "Failed sending remove station\n");
681 return ret;
682 }
683
684 /* Allocate a new station entry for the broadcast station to the given vif,
685 * and send it to the FW.
686 * Note that each P2P mac should have its own broadcast station.
687 *
688 * @mvm: the mvm component
689 * @vif: the interface to which the broadcast station is added
690 * @bsta: the broadcast station to add. */
691 int iwl_mvm_add_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
692 struct iwl_mvm_int_sta *bsta)
693 {
694 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
695 static const u8 baddr[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
696 u32 qmask;
697 int ret;
698
699 lockdep_assert_held(&mvm->mutex);
700
701 qmask = iwl_mvm_mac_get_queues_mask(mvm, vif);
702 ret = iwl_mvm_allocate_int_sta(mvm, bsta, qmask);
703 if (ret)
704 return ret;
705
706 ret = iwl_mvm_add_int_sta_common(mvm, bsta, baddr,
707 mvmvif->id, mvmvif->color);
708
709 if (ret)
710 iwl_mvm_dealloc_int_sta(mvm, bsta);
711 return ret;
712 }
713
714 /*
715 * Send the FW a request to remove the station from it's internal data
716 * structures, and in addition remove it from the local data structure.
717 */
718 int iwl_mvm_rm_bcast_sta(struct iwl_mvm *mvm, struct iwl_mvm_int_sta *bsta)
719 {
720 int ret;
721
722 lockdep_assert_held(&mvm->mutex);
723
724 ret = iwl_mvm_rm_sta_common(mvm, bsta->sta_id);
725 if (ret)
726 return ret;
727
728 iwl_mvm_dealloc_int_sta(mvm, bsta);
729 return ret;
730 }
731
732 #define IWL_MAX_RX_BA_SESSIONS 16
733
734 int iwl_mvm_sta_rx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
735 int tid, u16 ssn, bool start)
736 {
737 struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv;
738 struct iwl_mvm_add_sta_cmd_v6 cmd = {};
739 int ret;
740 u32 status;
741
742 lockdep_assert_held(&mvm->mutex);
743
744 if (start && mvm->rx_ba_sessions >= IWL_MAX_RX_BA_SESSIONS) {
745 IWL_WARN(mvm, "Not enough RX BA SESSIONS\n");
746 return -ENOSPC;
747 }
748
749 cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color);
750 cmd.sta_id = mvm_sta->sta_id;
751 cmd.add_modify = STA_MODE_MODIFY;
752 if (start) {
753 cmd.add_immediate_ba_tid = (u8) tid;
754 cmd.add_immediate_ba_ssn = cpu_to_le16(ssn);
755 } else {
756 cmd.remove_immediate_ba_tid = (u8) tid;
757 }
758 cmd.modify_mask = start ? STA_MODIFY_ADD_BA_TID :
759 STA_MODIFY_REMOVE_BA_TID;
760
761 status = ADD_STA_SUCCESS;
762 ret = iwl_mvm_send_add_sta_cmd_status(mvm, &cmd, &status);
763 if (ret)
764 return ret;
765
766 switch (status) {
767 case ADD_STA_SUCCESS:
768 IWL_DEBUG_INFO(mvm, "RX BA Session %sed in fw\n",
769 start ? "start" : "stopp");
770 break;
771 case ADD_STA_IMMEDIATE_BA_FAILURE:
772 IWL_WARN(mvm, "RX BA Session refused by fw\n");
773 ret = -ENOSPC;
774 break;
775 default:
776 ret = -EIO;
777 IWL_ERR(mvm, "RX BA Session failed %sing, status 0x%x\n",
778 start ? "start" : "stopp", status);
779 break;
780 }
781
782 if (!ret) {
783 if (start)
784 mvm->rx_ba_sessions++;
785 else if (mvm->rx_ba_sessions > 0)
786 /* check that restart flow didn't zero the counter */
787 mvm->rx_ba_sessions--;
788 }
789
790 return ret;
791 }
792
793 static int iwl_mvm_sta_tx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
794 int tid, u8 queue, bool start)
795 {
796 struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv;
797 struct iwl_mvm_add_sta_cmd_v6 cmd = {};
798 int ret;
799 u32 status;
800
801 lockdep_assert_held(&mvm->mutex);
802
803 if (start) {
804 mvm_sta->tfd_queue_msk |= BIT(queue);
805 mvm_sta->tid_disable_agg &= ~BIT(tid);
806 } else {
807 mvm_sta->tfd_queue_msk &= ~BIT(queue);
808 mvm_sta->tid_disable_agg |= BIT(tid);
809 }
810
811 cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color);
812 cmd.sta_id = mvm_sta->sta_id;
813 cmd.add_modify = STA_MODE_MODIFY;
814 cmd.modify_mask = STA_MODIFY_QUEUES | STA_MODIFY_TID_DISABLE_TX;
815 cmd.tfd_queue_msk = cpu_to_le32(mvm_sta->tfd_queue_msk);
816 cmd.tid_disable_tx = cpu_to_le16(mvm_sta->tid_disable_agg);
817
818 status = ADD_STA_SUCCESS;
819 ret = iwl_mvm_send_add_sta_cmd_status(mvm, &cmd, &status);
820 if (ret)
821 return ret;
822
823 switch (status) {
824 case ADD_STA_SUCCESS:
825 break;
826 default:
827 ret = -EIO;
828 IWL_ERR(mvm, "TX BA Session failed %sing, status 0x%x\n",
829 start ? "start" : "stopp", status);
830 break;
831 }
832
833 return ret;
834 }
835
836 static const u8 tid_to_ac[] = {
837 IEEE80211_AC_BE,
838 IEEE80211_AC_BK,
839 IEEE80211_AC_BK,
840 IEEE80211_AC_BE,
841 IEEE80211_AC_VI,
842 IEEE80211_AC_VI,
843 IEEE80211_AC_VO,
844 IEEE80211_AC_VO,
845 };
846
847 int iwl_mvm_sta_tx_agg_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
848 struct ieee80211_sta *sta, u16 tid, u16 *ssn)
849 {
850 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
851 struct iwl_mvm_tid_data *tid_data;
852 int txq_id;
853
854 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
855 return -EINVAL;
856
857 if (mvmsta->tid_data[tid].state != IWL_AGG_OFF) {
858 IWL_ERR(mvm, "Start AGG when state is not IWL_AGG_OFF %d!\n",
859 mvmsta->tid_data[tid].state);
860 return -ENXIO;
861 }
862
863 lockdep_assert_held(&mvm->mutex);
864
865 for (txq_id = mvm->first_agg_queue;
866 txq_id <= mvm->last_agg_queue; txq_id++)
867 if (mvm->queue_to_mac80211[txq_id] ==
868 IWL_INVALID_MAC80211_QUEUE)
869 break;
870
871 if (txq_id > mvm->last_agg_queue) {
872 IWL_ERR(mvm, "Failed to allocate agg queue\n");
873 return -EIO;
874 }
875
876 /* the new tx queue is still connected to the same mac80211 queue */
877 mvm->queue_to_mac80211[txq_id] = vif->hw_queue[tid_to_ac[tid]];
878
879 spin_lock_bh(&mvmsta->lock);
880 tid_data = &mvmsta->tid_data[tid];
881 tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
882 tid_data->txq_id = txq_id;
883 *ssn = tid_data->ssn;
884
885 IWL_DEBUG_TX_QUEUES(mvm,
886 "Start AGG: sta %d tid %d queue %d - ssn = %d, next_recl = %d\n",
887 mvmsta->sta_id, tid, txq_id, tid_data->ssn,
888 tid_data->next_reclaimed);
889
890 if (tid_data->ssn == tid_data->next_reclaimed) {
891 tid_data->state = IWL_AGG_STARTING;
892 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
893 } else {
894 tid_data->state = IWL_EMPTYING_HW_QUEUE_ADDBA;
895 }
896
897 spin_unlock_bh(&mvmsta->lock);
898
899 return 0;
900 }
901
902 int iwl_mvm_sta_tx_agg_oper(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
903 struct ieee80211_sta *sta, u16 tid, u8 buf_size)
904 {
905 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
906 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
907 int queue, fifo, ret;
908 u16 ssn;
909
910 buf_size = min_t(int, buf_size, LINK_QUAL_AGG_FRAME_LIMIT_DEF);
911
912 spin_lock_bh(&mvmsta->lock);
913 ssn = tid_data->ssn;
914 queue = tid_data->txq_id;
915 tid_data->state = IWL_AGG_ON;
916 tid_data->ssn = 0xffff;
917 spin_unlock_bh(&mvmsta->lock);
918
919 fifo = iwl_mvm_ac_to_tx_fifo[tid_to_ac[tid]];
920
921 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true);
922 if (ret)
923 return -EIO;
924
925 iwl_trans_txq_enable(mvm->trans, queue, fifo, mvmsta->sta_id, tid,
926 buf_size, ssn);
927
928 /*
929 * Even though in theory the peer could have different
930 * aggregation reorder buffer sizes for different sessions,
931 * our ucode doesn't allow for that and has a global limit
932 * for each station. Therefore, use the minimum of all the
933 * aggregation sessions and our default value.
934 */
935 mvmsta->max_agg_bufsize =
936 min(mvmsta->max_agg_bufsize, buf_size);
937 mvmsta->lq_sta.lq.agg_frame_cnt_limit = mvmsta->max_agg_bufsize;
938
939 IWL_DEBUG_HT(mvm, "Tx aggregation enabled on ra = %pM tid = %d\n",
940 sta->addr, tid);
941
942 return iwl_mvm_send_lq_cmd(mvm, &mvmsta->lq_sta.lq, false);
943 }
944
945 int iwl_mvm_sta_tx_agg_stop(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
946 struct ieee80211_sta *sta, u16 tid)
947 {
948 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
949 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
950 u16 txq_id;
951 int err;
952
953
954 /*
955 * If mac80211 is cleaning its state, then say that we finished since
956 * our state has been cleared anyway.
957 */
958 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
959 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
960 return 0;
961 }
962
963 spin_lock_bh(&mvmsta->lock);
964
965 txq_id = tid_data->txq_id;
966
967 IWL_DEBUG_TX_QUEUES(mvm, "Stop AGG: sta %d tid %d q %d state %d\n",
968 mvmsta->sta_id, tid, txq_id, tid_data->state);
969
970 switch (tid_data->state) {
971 case IWL_AGG_ON:
972 tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
973
974 IWL_DEBUG_TX_QUEUES(mvm,
975 "ssn = %d, next_recl = %d\n",
976 tid_data->ssn, tid_data->next_reclaimed);
977
978 /* There are still packets for this RA / TID in the HW */
979 if (tid_data->ssn != tid_data->next_reclaimed) {
980 tid_data->state = IWL_EMPTYING_HW_QUEUE_DELBA;
981 err = 0;
982 break;
983 }
984
985 tid_data->ssn = 0xffff;
986 iwl_trans_txq_disable(mvm->trans, txq_id);
987 /* fall through */
988 case IWL_AGG_STARTING:
989 case IWL_EMPTYING_HW_QUEUE_ADDBA:
990 /*
991 * The agg session has been stopped before it was set up. This
992 * can happen when the AddBA timer times out for example.
993 */
994
995 /* No barriers since we are under mutex */
996 lockdep_assert_held(&mvm->mutex);
997 mvm->queue_to_mac80211[txq_id] = IWL_INVALID_MAC80211_QUEUE;
998
999 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1000 tid_data->state = IWL_AGG_OFF;
1001 err = 0;
1002 break;
1003 default:
1004 IWL_ERR(mvm,
1005 "Stopping AGG while state not ON or starting for %d on %d (%d)\n",
1006 mvmsta->sta_id, tid, tid_data->state);
1007 IWL_ERR(mvm,
1008 "\ttid_data->txq_id = %d\n", tid_data->txq_id);
1009 err = -EINVAL;
1010 }
1011
1012 spin_unlock_bh(&mvmsta->lock);
1013
1014 return err;
1015 }
1016
1017 int iwl_mvm_sta_tx_agg_flush(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1018 struct ieee80211_sta *sta, u16 tid)
1019 {
1020 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1021 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
1022 u16 txq_id;
1023 enum iwl_mvm_agg_state old_state;
1024
1025 /*
1026 * First set the agg state to OFF to avoid calling
1027 * ieee80211_stop_tx_ba_cb in iwl_mvm_check_ratid_empty.
1028 */
1029 spin_lock_bh(&mvmsta->lock);
1030 txq_id = tid_data->txq_id;
1031 IWL_DEBUG_TX_QUEUES(mvm, "Flush AGG: sta %d tid %d q %d state %d\n",
1032 mvmsta->sta_id, tid, txq_id, tid_data->state);
1033 old_state = tid_data->state;
1034 tid_data->state = IWL_AGG_OFF;
1035 spin_unlock_bh(&mvmsta->lock);
1036
1037 if (old_state >= IWL_AGG_ON) {
1038 if (iwl_mvm_flush_tx_path(mvm, BIT(txq_id), true))
1039 IWL_ERR(mvm, "Couldn't flush the AGG queue\n");
1040
1041 iwl_trans_txq_disable(mvm->trans, tid_data->txq_id);
1042 }
1043
1044 mvm->queue_to_mac80211[tid_data->txq_id] =
1045 IWL_INVALID_MAC80211_QUEUE;
1046
1047 return 0;
1048 }
1049
1050 static int iwl_mvm_set_fw_key_idx(struct iwl_mvm *mvm)
1051 {
1052 int i;
1053
1054 lockdep_assert_held(&mvm->mutex);
1055
1056 i = find_first_zero_bit(mvm->fw_key_table, STA_KEY_MAX_NUM);
1057
1058 if (i == STA_KEY_MAX_NUM)
1059 return STA_KEY_IDX_INVALID;
1060
1061 __set_bit(i, mvm->fw_key_table);
1062
1063 return i;
1064 }
1065
1066 static u8 iwl_mvm_get_key_sta_id(struct ieee80211_vif *vif,
1067 struct ieee80211_sta *sta)
1068 {
1069 struct iwl_mvm_vif *mvmvif = (void *)vif->drv_priv;
1070
1071 if (sta) {
1072 struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv;
1073
1074 return mvm_sta->sta_id;
1075 }
1076
1077 /*
1078 * The device expects GTKs for station interfaces to be
1079 * installed as GTKs for the AP station. If we have no
1080 * station ID, then use AP's station ID.
1081 */
1082 if (vif->type == NL80211_IFTYPE_STATION &&
1083 mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT)
1084 return mvmvif->ap_sta_id;
1085
1086 return IWL_MVM_STATION_COUNT;
1087 }
1088
1089 static int iwl_mvm_send_sta_key(struct iwl_mvm *mvm,
1090 struct iwl_mvm_sta *mvm_sta,
1091 struct ieee80211_key_conf *keyconf,
1092 u8 sta_id, u32 tkip_iv32, u16 *tkip_p1k,
1093 u32 cmd_flags)
1094 {
1095 __le16 key_flags;
1096 struct iwl_mvm_add_sta_key_cmd cmd = {};
1097 int ret, status;
1098 u16 keyidx;
1099 int i;
1100 u32 mac_id_n_color = mvm_sta->mac_id_n_color;
1101
1102 keyidx = (keyconf->keyidx << STA_KEY_FLG_KEYID_POS) &
1103 STA_KEY_FLG_KEYID_MSK;
1104 key_flags = cpu_to_le16(keyidx);
1105 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_KEY_MAP);
1106
1107 switch (keyconf->cipher) {
1108 case WLAN_CIPHER_SUITE_TKIP:
1109 key_flags |= cpu_to_le16(STA_KEY_FLG_TKIP);
1110 cmd.tkip_rx_tsc_byte2 = tkip_iv32;
1111 for (i = 0; i < 5; i++)
1112 cmd.tkip_rx_ttak[i] = cpu_to_le16(tkip_p1k[i]);
1113 memcpy(cmd.key, keyconf->key, keyconf->keylen);
1114 break;
1115 case WLAN_CIPHER_SUITE_CCMP:
1116 key_flags |= cpu_to_le16(STA_KEY_FLG_CCM);
1117 memcpy(cmd.key, keyconf->key, keyconf->keylen);
1118 break;
1119 default:
1120 key_flags |= cpu_to_le16(STA_KEY_FLG_EXT);
1121 memcpy(cmd.key, keyconf->key, keyconf->keylen);
1122 }
1123
1124 if (!(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE))
1125 key_flags |= cpu_to_le16(STA_KEY_MULTICAST);
1126
1127 cmd.key_offset = keyconf->hw_key_idx;
1128 cmd.key_flags = key_flags;
1129 cmd.sta_id = sta_id;
1130
1131 status = ADD_STA_SUCCESS;
1132 if (cmd_flags == CMD_SYNC)
1133 ret = iwl_mvm_send_add_sta_key_cmd_status(mvm, &cmd,
1134 mac_id_n_color,
1135 &status);
1136 else
1137 ret = iwl_mvm_send_add_sta_key_cmd(mvm, CMD_ASYNC, &cmd,
1138 mac_id_n_color);
1139
1140 switch (status) {
1141 case ADD_STA_SUCCESS:
1142 IWL_DEBUG_WEP(mvm, "MODIFY_STA: set dynamic key passed\n");
1143 break;
1144 default:
1145 ret = -EIO;
1146 IWL_ERR(mvm, "MODIFY_STA: set dynamic key failed\n");
1147 break;
1148 }
1149
1150 return ret;
1151 }
1152
1153 static int iwl_mvm_send_sta_igtk(struct iwl_mvm *mvm,
1154 struct ieee80211_key_conf *keyconf,
1155 u8 sta_id, bool remove_key)
1156 {
1157 struct iwl_mvm_mgmt_mcast_key_cmd igtk_cmd = {};
1158
1159 /* verify the key details match the required command's expectations */
1160 if (WARN_ON((keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC) ||
1161 (keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE) ||
1162 (keyconf->keyidx != 4 && keyconf->keyidx != 5)))
1163 return -EINVAL;
1164
1165 igtk_cmd.key_id = cpu_to_le32(keyconf->keyidx);
1166 igtk_cmd.sta_id = cpu_to_le32(sta_id);
1167
1168 if (remove_key) {
1169 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_NOT_VALID);
1170 } else {
1171 struct ieee80211_key_seq seq;
1172 const u8 *pn;
1173
1174 memcpy(igtk_cmd.IGTK, keyconf->key, keyconf->keylen);
1175 ieee80211_aes_cmac_calculate_k1_k2(keyconf,
1176 igtk_cmd.K1, igtk_cmd.K2);
1177 ieee80211_get_key_rx_seq(keyconf, 0, &seq);
1178 pn = seq.aes_cmac.pn;
1179 igtk_cmd.receive_seq_cnt = cpu_to_le64(((u64) pn[5] << 0) |
1180 ((u64) pn[4] << 8) |
1181 ((u64) pn[3] << 16) |
1182 ((u64) pn[2] << 24) |
1183 ((u64) pn[1] << 32) |
1184 ((u64) pn[0] << 40));
1185 }
1186
1187 IWL_DEBUG_INFO(mvm, "%s igtk for sta %u\n",
1188 remove_key ? "removing" : "installing",
1189 igtk_cmd.sta_id);
1190
1191 return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, CMD_SYNC,
1192 sizeof(igtk_cmd), &igtk_cmd);
1193 }
1194
1195
1196 static inline u8 *iwl_mvm_get_mac_addr(struct iwl_mvm *mvm,
1197 struct ieee80211_vif *vif,
1198 struct ieee80211_sta *sta)
1199 {
1200 struct iwl_mvm_vif *mvmvif = (void *)vif->drv_priv;
1201
1202 if (sta)
1203 return sta->addr;
1204
1205 if (vif->type == NL80211_IFTYPE_STATION &&
1206 mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT) {
1207 u8 sta_id = mvmvif->ap_sta_id;
1208 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
1209 lockdep_is_held(&mvm->mutex));
1210 return sta->addr;
1211 }
1212
1213
1214 return NULL;
1215 }
1216
1217 int iwl_mvm_set_sta_key(struct iwl_mvm *mvm,
1218 struct ieee80211_vif *vif,
1219 struct ieee80211_sta *sta,
1220 struct ieee80211_key_conf *keyconf,
1221 bool have_key_offset)
1222 {
1223 struct iwl_mvm_sta *mvm_sta;
1224 int ret;
1225 u8 *addr, sta_id;
1226 struct ieee80211_key_seq seq;
1227 u16 p1k[5];
1228
1229 lockdep_assert_held(&mvm->mutex);
1230
1231 /* Get the station id from the mvm local station table */
1232 sta_id = iwl_mvm_get_key_sta_id(vif, sta);
1233 if (sta_id == IWL_MVM_STATION_COUNT) {
1234 IWL_ERR(mvm, "Failed to find station id\n");
1235 return -EINVAL;
1236 }
1237
1238 if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC) {
1239 ret = iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, false);
1240 goto end;
1241 }
1242
1243 /*
1244 * It is possible that the 'sta' parameter is NULL, and thus
1245 * there is a need to retrieve the sta from the local station table.
1246 */
1247 if (!sta) {
1248 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
1249 lockdep_is_held(&mvm->mutex));
1250 if (IS_ERR_OR_NULL(sta)) {
1251 IWL_ERR(mvm, "Invalid station id\n");
1252 return -EINVAL;
1253 }
1254 }
1255
1256 mvm_sta = (struct iwl_mvm_sta *)sta->drv_priv;
1257 if (WARN_ON_ONCE(mvm_sta->vif != vif))
1258 return -EINVAL;
1259
1260 if (!have_key_offset) {
1261 /*
1262 * The D3 firmware hardcodes the PTK offset to 0, so we have to
1263 * configure it there. As a result, this workaround exists to
1264 * let the caller set the key offset (hw_key_idx), see d3.c.
1265 */
1266 keyconf->hw_key_idx = iwl_mvm_set_fw_key_idx(mvm);
1267 if (keyconf->hw_key_idx == STA_KEY_IDX_INVALID)
1268 return -ENOSPC;
1269 }
1270
1271 switch (keyconf->cipher) {
1272 case WLAN_CIPHER_SUITE_TKIP:
1273 addr = iwl_mvm_get_mac_addr(mvm, vif, sta);
1274 /* get phase 1 key from mac80211 */
1275 ieee80211_get_key_rx_seq(keyconf, 0, &seq);
1276 ieee80211_get_tkip_rx_p1k(keyconf, addr, seq.tkip.iv32, p1k);
1277 ret = iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, sta_id,
1278 seq.tkip.iv32, p1k, CMD_SYNC);
1279 break;
1280 case WLAN_CIPHER_SUITE_CCMP:
1281 ret = iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, sta_id,
1282 0, NULL, CMD_SYNC);
1283 break;
1284 default:
1285 ret = iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf,
1286 sta_id, 0, NULL, CMD_SYNC);
1287 }
1288
1289 if (ret)
1290 __clear_bit(keyconf->hw_key_idx, mvm->fw_key_table);
1291
1292 end:
1293 IWL_DEBUG_WEP(mvm, "key: cipher=%x len=%d idx=%d sta=%pM ret=%d\n",
1294 keyconf->cipher, keyconf->keylen, keyconf->keyidx,
1295 sta->addr, ret);
1296 return ret;
1297 }
1298
1299 int iwl_mvm_remove_sta_key(struct iwl_mvm *mvm,
1300 struct ieee80211_vif *vif,
1301 struct ieee80211_sta *sta,
1302 struct ieee80211_key_conf *keyconf)
1303 {
1304 struct iwl_mvm_sta *mvm_sta;
1305 struct iwl_mvm_add_sta_key_cmd cmd = {};
1306 __le16 key_flags;
1307 int ret, status;
1308 u8 sta_id;
1309
1310 lockdep_assert_held(&mvm->mutex);
1311
1312 /* Get the station id from the mvm local station table */
1313 sta_id = iwl_mvm_get_key_sta_id(vif, sta);
1314
1315 IWL_DEBUG_WEP(mvm, "mvm remove dynamic key: idx=%d sta=%d\n",
1316 keyconf->keyidx, sta_id);
1317
1318 if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC)
1319 return iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, true);
1320
1321 ret = __test_and_clear_bit(keyconf->hw_key_idx, mvm->fw_key_table);
1322 if (!ret) {
1323 IWL_ERR(mvm, "offset %d not used in fw key table.\n",
1324 keyconf->hw_key_idx);
1325 return -ENOENT;
1326 }
1327
1328 if (sta_id == IWL_MVM_STATION_COUNT) {
1329 IWL_DEBUG_WEP(mvm, "station non-existent, early return.\n");
1330 return 0;
1331 }
1332
1333 /*
1334 * It is possible that the 'sta' parameter is NULL, and thus
1335 * there is a need to retrieve the sta from the local station table,
1336 * for example when a GTK is removed (where the sta_id will then be
1337 * the AP ID, and no station was passed by mac80211.)
1338 */
1339 if (!sta) {
1340 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
1341 lockdep_is_held(&mvm->mutex));
1342 if (!sta) {
1343 IWL_ERR(mvm, "Invalid station id\n");
1344 return -EINVAL;
1345 }
1346 }
1347
1348 mvm_sta = (struct iwl_mvm_sta *)sta->drv_priv;
1349 if (WARN_ON_ONCE(mvm_sta->vif != vif))
1350 return -EINVAL;
1351
1352 key_flags = cpu_to_le16((keyconf->keyidx << STA_KEY_FLG_KEYID_POS) &
1353 STA_KEY_FLG_KEYID_MSK);
1354 key_flags |= cpu_to_le16(STA_KEY_FLG_NO_ENC | STA_KEY_FLG_WEP_KEY_MAP);
1355 key_flags |= cpu_to_le16(STA_KEY_NOT_VALID);
1356
1357 if (!(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE))
1358 key_flags |= cpu_to_le16(STA_KEY_MULTICAST);
1359
1360 cmd.key_flags = key_flags;
1361 cmd.key_offset = keyconf->hw_key_idx;
1362 cmd.sta_id = sta_id;
1363
1364 status = ADD_STA_SUCCESS;
1365 ret = iwl_mvm_send_add_sta_key_cmd_status(mvm, &cmd,
1366 mvm_sta->mac_id_n_color,
1367 &status);
1368
1369 switch (status) {
1370 case ADD_STA_SUCCESS:
1371 IWL_DEBUG_WEP(mvm, "MODIFY_STA: remove sta key passed\n");
1372 break;
1373 default:
1374 ret = -EIO;
1375 IWL_ERR(mvm, "MODIFY_STA: remove sta key failed\n");
1376 break;
1377 }
1378
1379 return ret;
1380 }
1381
1382 void iwl_mvm_update_tkip_key(struct iwl_mvm *mvm,
1383 struct ieee80211_vif *vif,
1384 struct ieee80211_key_conf *keyconf,
1385 struct ieee80211_sta *sta, u32 iv32,
1386 u16 *phase1key)
1387 {
1388 struct iwl_mvm_sta *mvm_sta;
1389 u8 sta_id = iwl_mvm_get_key_sta_id(vif, sta);
1390
1391 if (WARN_ON_ONCE(sta_id == IWL_MVM_STATION_COUNT))
1392 return;
1393
1394 rcu_read_lock();
1395
1396 if (!sta) {
1397 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
1398 if (WARN_ON(IS_ERR_OR_NULL(sta))) {
1399 rcu_read_unlock();
1400 return;
1401 }
1402 }
1403
1404 mvm_sta = (void *)sta->drv_priv;
1405 iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, sta_id,
1406 iv32, phase1key, CMD_ASYNC);
1407 rcu_read_unlock();
1408 }
1409
1410 void iwl_mvm_sta_modify_ps_wake(struct iwl_mvm *mvm,
1411 struct ieee80211_sta *sta)
1412 {
1413 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1414 struct iwl_mvm_add_sta_cmd_v6 cmd = {
1415 .add_modify = STA_MODE_MODIFY,
1416 .sta_id = mvmsta->sta_id,
1417 .station_flags_msk = cpu_to_le32(STA_FLG_PS),
1418 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
1419 };
1420 int ret;
1421
1422 ret = iwl_mvm_send_add_sta_cmd(mvm, CMD_ASYNC, &cmd);
1423 if (ret)
1424 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
1425 }
1426
1427 void iwl_mvm_sta_modify_sleep_tx_count(struct iwl_mvm *mvm,
1428 struct ieee80211_sta *sta,
1429 enum ieee80211_frame_release_type reason,
1430 u16 cnt)
1431 {
1432 u16 sleep_state_flags =
1433 (reason == IEEE80211_FRAME_RELEASE_UAPSD) ?
1434 STA_SLEEP_STATE_UAPSD : STA_SLEEP_STATE_PS_POLL;
1435 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1436 struct iwl_mvm_add_sta_cmd_v6 cmd = {
1437 .add_modify = STA_MODE_MODIFY,
1438 .sta_id = mvmsta->sta_id,
1439 .modify_mask = STA_MODIFY_SLEEPING_STA_TX_COUNT,
1440 .sleep_tx_count = cpu_to_le16(cnt),
1441 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
1442 /*
1443 * Same modify mask for sleep_tx_count and sleep_state_flags so
1444 * we must set the sleep_state_flags too.
1445 */
1446 .sleep_state_flags = cpu_to_le16(sleep_state_flags),
1447 };
1448 int ret;
1449
1450 /* TODO: somehow the fw doesn't seem to take PS_POLL into account */
1451 ret = iwl_mvm_send_add_sta_cmd(mvm, CMD_ASYNC, &cmd);
1452 if (ret)
1453 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
1454 }
Linux with added FPC-III support