blob: b23ab4a4504f7f140877ff734682b92607e276b6 [file] [log] [blame]
Johannes Berg8ca151b2013-01-24 14:25:36 +01001/******************************************************************************
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 *
Andrei Otcheretianskifa7878e2015-05-05 09:28:16 +03008 * Copyright(c) 2012 - 2015 Intel Corporation. All rights reserved.
9 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
Sara Sharon854c5702016-01-26 13:17:47 +020010 * Copyright(c) 2016 Intel Deutschland GmbH
Johannes Berg8ca151b2013-01-24 14:25:36 +010011 *
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of version 2 of the GNU General Public License as
14 * published by the Free Software Foundation.
15 *
16 * This program is distributed in the hope that it will be useful, but
17 * WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
19 * General Public License for more details.
20 *
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
24 * USA
25 *
26 * The full GNU General Public License is included in this distribution
Emmanuel Grumbach410dc5a2013-02-18 09:22:28 +020027 * in the file called COPYING.
Johannes Berg8ca151b2013-01-24 14:25:36 +010028 *
29 * Contact Information:
Emmanuel Grumbachcb2f8272015-11-17 15:39:56 +020030 * Intel Linux Wireless <linuxwifi@intel.com>
Johannes Berg8ca151b2013-01-24 14:25:36 +010031 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
32 *
33 * BSD LICENSE
34 *
Andrei Otcheretianskifa7878e2015-05-05 09:28:16 +030035 * Copyright(c) 2012 - 2015 Intel Corporation. All rights reserved.
36 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
Sara Sharon854c5702016-01-26 13:17:47 +020037 * Copyright(c) 2016 Intel Deutschland GmbH
Johannes Berg8ca151b2013-01-24 14:25:36 +010038 * All rights reserved.
39 *
40 * Redistribution and use in source and binary forms, with or without
41 * modification, are permitted provided that the following conditions
42 * are met:
43 *
44 * * Redistributions of source code must retain the above copyright
45 * notice, this list of conditions and the following disclaimer.
46 * * Redistributions in binary form must reproduce the above copyright
47 * notice, this list of conditions and the following disclaimer in
48 * the documentation and/or other materials provided with the
49 * distribution.
50 * * Neither the name Intel Corporation nor the names of its
51 * contributors may be used to endorse or promote products derived
52 * from this software without specific prior written permission.
53 *
54 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
55 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
56 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
57 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
58 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
59 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
60 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
61 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
62 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
63 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
64 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
65 *
66 *****************************************************************************/
67#include <net/mac80211.h>
68
69#include "mvm.h"
70#include "sta.h"
Eytan Lifshitz9ee718a2013-05-19 19:14:41 +030071#include "rs.h"
Johannes Berg8ca151b2013-01-24 14:25:36 +010072
Sara Sharon854c5702016-01-26 13:17:47 +020073/*
74 * New version of ADD_STA_sta command added new fields at the end of the
75 * structure, so sending the size of the relevant API's structure is enough to
76 * support both API versions.
77 */
78static inline int iwl_mvm_add_sta_cmd_size(struct iwl_mvm *mvm)
79{
80 return iwl_mvm_has_new_rx_api(mvm) ?
81 sizeof(struct iwl_mvm_add_sta_cmd) :
82 sizeof(struct iwl_mvm_add_sta_cmd_v7);
83}
84
Eliad Pellerb92e6612014-01-23 17:58:23 +020085static int iwl_mvm_find_free_sta_id(struct iwl_mvm *mvm,
86 enum nl80211_iftype iftype)
Johannes Berg8ca151b2013-01-24 14:25:36 +010087{
88 int sta_id;
Eliad Pellerb92e6612014-01-23 17:58:23 +020089 u32 reserved_ids = 0;
Johannes Berg8ca151b2013-01-24 14:25:36 +010090
Eliad Pellerb92e6612014-01-23 17:58:23 +020091 BUILD_BUG_ON(IWL_MVM_STATION_COUNT > 32);
Johannes Berg8ca151b2013-01-24 14:25:36 +010092 WARN_ON_ONCE(test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status));
93
94 lockdep_assert_held(&mvm->mutex);
95
Eliad Pellerb92e6612014-01-23 17:58:23 +020096 /* d0i3/d3 assumes the AP's sta_id (of sta vif) is 0. reserve it. */
97 if (iftype != NL80211_IFTYPE_STATION)
98 reserved_ids = BIT(0);
99
Johannes Berg8ca151b2013-01-24 14:25:36 +0100100 /* Don't take rcu_read_lock() since we are protected by mvm->mutex */
Eliad Pellerb92e6612014-01-23 17:58:23 +0200101 for (sta_id = 0; sta_id < IWL_MVM_STATION_COUNT; sta_id++) {
102 if (BIT(sta_id) & reserved_ids)
103 continue;
104
Johannes Berg8ca151b2013-01-24 14:25:36 +0100105 if (!rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
106 lockdep_is_held(&mvm->mutex)))
107 return sta_id;
Eliad Pellerb92e6612014-01-23 17:58:23 +0200108 }
Johannes Berg8ca151b2013-01-24 14:25:36 +0100109 return IWL_MVM_STATION_COUNT;
110}
111
Johannes Berg7a453972013-02-12 13:10:44 +0100112/* send station add/update command to firmware */
113int iwl_mvm_sta_send_to_fw(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
Liad Kaufman24afba72015-07-28 18:56:08 +0300114 bool update, unsigned int flags)
Johannes Berg8ca151b2013-01-24 14:25:36 +0100115{
Johannes Berg9d8ce6a2014-12-23 16:02:40 +0100116 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
Emmanuel Grumbach4b8265a2014-07-13 08:58:04 +0300117 struct iwl_mvm_add_sta_cmd add_sta_cmd = {
118 .sta_id = mvm_sta->sta_id,
119 .mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color),
120 .add_modify = update ? 1 : 0,
121 .station_flags_msk = cpu_to_le32(STA_FLG_FAT_EN_MSK |
122 STA_FLG_MIMO_EN_MSK),
Liad Kaufmancf0cda12015-09-24 10:44:12 +0200123 .tid_disable_tx = cpu_to_le16(mvm_sta->tid_disable_agg),
Emmanuel Grumbach4b8265a2014-07-13 08:58:04 +0300124 };
Johannes Berg8ca151b2013-01-24 14:25:36 +0100125 int ret;
126 u32 status;
127 u32 agg_size = 0, mpdu_dens = 0;
128
Liad Kaufman24afba72015-07-28 18:56:08 +0300129 if (!update || (flags & STA_MODIFY_QUEUES)) {
Johannes Berg7a453972013-02-12 13:10:44 +0100130 add_sta_cmd.tfd_queue_msk = cpu_to_le32(mvm_sta->tfd_queue_msk);
131 memcpy(&add_sta_cmd.addr, sta->addr, ETH_ALEN);
Liad Kaufman24afba72015-07-28 18:56:08 +0300132
133 if (flags & STA_MODIFY_QUEUES)
134 add_sta_cmd.modify_mask |= STA_MODIFY_QUEUES;
Johannes Berg7a453972013-02-12 13:10:44 +0100135 }
Johannes Berg5bc5aaa2013-02-12 14:35:36 +0100136
137 switch (sta->bandwidth) {
138 case IEEE80211_STA_RX_BW_160:
139 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_160MHZ);
140 /* fall through */
141 case IEEE80211_STA_RX_BW_80:
142 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_80MHZ);
143 /* fall through */
144 case IEEE80211_STA_RX_BW_40:
145 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_40MHZ);
146 /* fall through */
147 case IEEE80211_STA_RX_BW_20:
148 if (sta->ht_cap.ht_supported)
149 add_sta_cmd.station_flags |=
150 cpu_to_le32(STA_FLG_FAT_EN_20MHZ);
151 break;
152 }
153
154 switch (sta->rx_nss) {
155 case 1:
156 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_SISO);
157 break;
158 case 2:
159 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_MIMO2);
160 break;
161 case 3 ... 8:
162 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_MIMO3);
163 break;
164 }
165
166 switch (sta->smps_mode) {
167 case IEEE80211_SMPS_AUTOMATIC:
168 case IEEE80211_SMPS_NUM_MODES:
169 WARN_ON(1);
170 break;
171 case IEEE80211_SMPS_STATIC:
172 /* override NSS */
173 add_sta_cmd.station_flags &= ~cpu_to_le32(STA_FLG_MIMO_EN_MSK);
174 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_SISO);
175 break;
176 case IEEE80211_SMPS_DYNAMIC:
177 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_RTS_MIMO_PROT);
178 break;
179 case IEEE80211_SMPS_OFF:
180 /* nothing */
181 break;
182 }
Johannes Berg8ca151b2013-01-24 14:25:36 +0100183
184 if (sta->ht_cap.ht_supported) {
185 add_sta_cmd.station_flags_msk |=
186 cpu_to_le32(STA_FLG_MAX_AGG_SIZE_MSK |
187 STA_FLG_AGG_MPDU_DENS_MSK);
188
189 mpdu_dens = sta->ht_cap.ampdu_density;
190 }
191
192 if (sta->vht_cap.vht_supported) {
193 agg_size = sta->vht_cap.cap &
194 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK;
195 agg_size >>=
196 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_SHIFT;
197 } else if (sta->ht_cap.ht_supported) {
198 agg_size = sta->ht_cap.ampdu_factor;
199 }
200
201 add_sta_cmd.station_flags |=
202 cpu_to_le32(agg_size << STA_FLG_MAX_AGG_SIZE_SHIFT);
203 add_sta_cmd.station_flags |=
204 cpu_to_le32(mpdu_dens << STA_FLG_AGG_MPDU_DENS_SHIFT);
205
206 status = ADD_STA_SUCCESS;
Sara Sharon854c5702016-01-26 13:17:47 +0200207 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
208 iwl_mvm_add_sta_cmd_size(mvm),
Emmanuel Grumbachf9dc0002014-03-30 09:53:27 +0300209 &add_sta_cmd, &status);
Johannes Berg8ca151b2013-01-24 14:25:36 +0100210 if (ret)
211 return ret;
212
Sara Sharon837c4da2016-01-07 16:50:45 +0200213 switch (status & IWL_ADD_STA_STATUS_MASK) {
Johannes Berg8ca151b2013-01-24 14:25:36 +0100214 case ADD_STA_SUCCESS:
215 IWL_DEBUG_ASSOC(mvm, "ADD_STA PASSED\n");
216 break;
217 default:
218 ret = -EIO;
219 IWL_ERR(mvm, "ADD_STA failed\n");
220 break;
221 }
222
223 return ret;
224}
225
Sara Sharon10b2b202016-03-20 16:23:41 +0200226static void iwl_mvm_rx_agg_session_expired(unsigned long data)
227{
228 struct iwl_mvm_baid_data __rcu **rcu_ptr = (void *)data;
229 struct iwl_mvm_baid_data *ba_data;
230 struct ieee80211_sta *sta;
231 struct iwl_mvm_sta *mvm_sta;
232 unsigned long timeout;
233
234 rcu_read_lock();
235
236 ba_data = rcu_dereference(*rcu_ptr);
237
238 if (WARN_ON(!ba_data))
239 goto unlock;
240
241 if (!ba_data->timeout)
242 goto unlock;
243
244 timeout = ba_data->last_rx + TU_TO_JIFFIES(ba_data->timeout * 2);
245 if (time_is_after_jiffies(timeout)) {
246 mod_timer(&ba_data->session_timer, timeout);
247 goto unlock;
248 }
249
250 /* Timer expired */
251 sta = rcu_dereference(ba_data->mvm->fw_id_to_mac_id[ba_data->sta_id]);
252 mvm_sta = iwl_mvm_sta_from_mac80211(sta);
253 ieee80211_stop_rx_ba_session_offl(mvm_sta->vif,
254 sta->addr, ba_data->tid);
255unlock:
256 rcu_read_unlock();
257}
258
Arik Nemtsova0f6bf22014-09-21 19:10:04 +0300259static int iwl_mvm_tdls_sta_init(struct iwl_mvm *mvm,
260 struct ieee80211_sta *sta)
261{
262 unsigned long used_hw_queues;
263 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
Emmanuel Grumbach5d42e7b2015-03-19 20:04:51 +0200264 unsigned int wdg_timeout =
265 iwl_mvm_get_wd_timeout(mvm, NULL, true, false);
Arik Nemtsova0f6bf22014-09-21 19:10:04 +0300266 u32 ac;
267
268 lockdep_assert_held(&mvm->mutex);
269
270 used_hw_queues = iwl_mvm_get_used_hw_queues(mvm, NULL);
271
272 /* Find available queues, and allocate them to the ACs */
273 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
274 u8 queue = find_first_zero_bit(&used_hw_queues,
275 mvm->first_agg_queue);
276
277 if (queue >= mvm->first_agg_queue) {
278 IWL_ERR(mvm, "Failed to allocate STA queue\n");
279 return -EBUSY;
280 }
281
282 __set_bit(queue, &used_hw_queues);
283 mvmsta->hw_queue[ac] = queue;
284 }
285
286 /* Found a place for all queues - enable them */
287 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
288 iwl_mvm_enable_ac_txq(mvm, mvmsta->hw_queue[ac],
Liad Kaufman4ecafae2015-07-14 13:36:18 +0300289 mvmsta->hw_queue[ac],
Liad Kaufman5c1156e2015-07-22 17:59:53 +0300290 iwl_mvm_ac_to_tx_fifo[ac], 0,
291 wdg_timeout);
Arik Nemtsova0f6bf22014-09-21 19:10:04 +0300292 mvmsta->tfd_queue_msk |= BIT(mvmsta->hw_queue[ac]);
293 }
294
295 return 0;
296}
297
298static void iwl_mvm_tdls_sta_deinit(struct iwl_mvm *mvm,
299 struct ieee80211_sta *sta)
300{
301 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
302 unsigned long sta_msk;
303 int i;
304
305 lockdep_assert_held(&mvm->mutex);
306
307 /* disable the TDLS STA-specific queues */
308 sta_msk = mvmsta->tfd_queue_msk;
Emmanuel Grumbacha4ca3ed2015-01-20 17:07:10 +0200309 for_each_set_bit(i, &sta_msk, sizeof(sta_msk) * BITS_PER_BYTE)
Arik Nemtsov06ecdba2015-10-12 14:47:11 +0300310 iwl_mvm_disable_txq(mvm, i, i, IWL_MAX_TID_COUNT, 0);
Arik Nemtsova0f6bf22014-09-21 19:10:04 +0300311}
312
Liad Kaufman24afba72015-07-28 18:56:08 +0300313static int iwl_mvm_sta_alloc_queue(struct iwl_mvm *mvm,
314 struct ieee80211_sta *sta, u8 ac, int tid,
315 struct ieee80211_hdr *hdr)
316{
317 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
318 struct iwl_trans_txq_scd_cfg cfg = {
319 .fifo = iwl_mvm_ac_to_tx_fifo[ac],
320 .sta_id = mvmsta->sta_id,
321 .tid = tid,
322 .frame_limit = IWL_FRAME_LIMIT,
323 };
324 unsigned int wdg_timeout =
325 iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false);
326 u8 mac_queue = mvmsta->vif->hw_queue[ac];
327 int queue = -1;
328 int ssn;
Liad Kaufmancf961e12015-08-13 19:16:08 +0300329 int ret;
Liad Kaufman24afba72015-07-28 18:56:08 +0300330
331 lockdep_assert_held(&mvm->mutex);
332
Liad Kaufmand2515a92016-03-23 16:31:08 +0200333 spin_lock_bh(&mvm->queue_info_lock);
Liad Kaufman24afba72015-07-28 18:56:08 +0300334
335 /*
336 * Non-QoS, QoS NDP and MGMT frames should go to a MGMT queue, if one
337 * exists
338 */
339 if (!ieee80211_is_data_qos(hdr->frame_control) ||
340 ieee80211_is_qos_nullfunc(hdr->frame_control)) {
341 queue = iwl_mvm_find_free_queue(mvm, IWL_MVM_DQA_MIN_MGMT_QUEUE,
342 IWL_MVM_DQA_MAX_MGMT_QUEUE);
343 if (queue >= IWL_MVM_DQA_MIN_MGMT_QUEUE)
344 IWL_DEBUG_TX_QUEUES(mvm, "Found free MGMT queue #%d\n",
345 queue);
346
347 /* If no such queue is found, we'll use a DATA queue instead */
348 }
349
350 if (queue < 0 && mvmsta->reserved_queue != IEEE80211_INVAL_HW_QUEUE) {
351 queue = mvmsta->reserved_queue;
352 IWL_DEBUG_TX_QUEUES(mvm, "Using reserved queue #%d\n", queue);
353 }
354
355 if (queue < 0)
356 queue = iwl_mvm_find_free_queue(mvm, IWL_MVM_DQA_MIN_DATA_QUEUE,
357 IWL_MVM_DQA_MAX_DATA_QUEUE);
Liad Kaufmancf961e12015-08-13 19:16:08 +0300358
359 /*
360 * Mark TXQ as ready, even though it hasn't been fully configured yet,
361 * to make sure no one else takes it.
362 * This will allow avoiding re-acquiring the lock at the end of the
363 * configuration. On error we'll mark it back as free.
364 */
Liad Kaufman24afba72015-07-28 18:56:08 +0300365 if (queue >= 0)
Liad Kaufmancf961e12015-08-13 19:16:08 +0300366 mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY;
Liad Kaufman24afba72015-07-28 18:56:08 +0300367
Liad Kaufmand2515a92016-03-23 16:31:08 +0200368 spin_unlock_bh(&mvm->queue_info_lock);
Liad Kaufman24afba72015-07-28 18:56:08 +0300369
370 /* TODO: support shared queues for same RA */
371 if (queue < 0)
372 return -ENOSPC;
373
374 /*
375 * Actual en/disablement of aggregations is through the ADD_STA HCMD,
376 * but for configuring the SCD to send A-MPDUs we need to mark the queue
377 * as aggregatable.
378 * Mark all DATA queues as allowing to be aggregated at some point
379 */
Liad Kaufmand5216a22015-08-09 15:50:51 +0300380 cfg.aggregate = (queue >= IWL_MVM_DQA_MIN_DATA_QUEUE ||
381 queue == IWL_MVM_DQA_BSS_CLIENT_QUEUE);
Liad Kaufman24afba72015-07-28 18:56:08 +0300382
383 IWL_DEBUG_TX_QUEUES(mvm, "Allocating queue #%d to sta %d on tid %d\n",
384 queue, mvmsta->sta_id, tid);
385
386 ssn = IEEE80211_SEQ_TO_SN(le16_to_cpu(hdr->seq_ctrl));
387 iwl_mvm_enable_txq(mvm, queue, mac_queue, ssn, &cfg,
388 wdg_timeout);
389
390 spin_lock_bh(&mvmsta->lock);
391 mvmsta->tid_data[tid].txq_id = queue;
392 mvmsta->tfd_queue_msk |= BIT(queue);
393
394 if (mvmsta->reserved_queue == queue)
395 mvmsta->reserved_queue = IEEE80211_INVAL_HW_QUEUE;
396 spin_unlock_bh(&mvmsta->lock);
397
Liad Kaufmancf961e12015-08-13 19:16:08 +0300398 ret = iwl_mvm_sta_send_to_fw(mvm, sta, true, STA_MODIFY_QUEUES);
399 if (ret)
400 goto out_err;
401
402 return 0;
403
404out_err:
405 iwl_mvm_disable_txq(mvm, queue, mac_queue, tid, 0);
406
407 return ret;
Liad Kaufman24afba72015-07-28 18:56:08 +0300408}
409
410static inline u8 iwl_mvm_tid_to_ac_queue(int tid)
411{
412 if (tid == IWL_MAX_TID_COUNT)
413 return IEEE80211_AC_VO; /* MGMT */
414
415 return tid_to_mac80211_ac[tid];
416}
417
418static void iwl_mvm_tx_deferred_stream(struct iwl_mvm *mvm,
419 struct ieee80211_sta *sta, int tid)
420{
421 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
422 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
423 struct sk_buff *skb;
424 struct ieee80211_hdr *hdr;
425 struct sk_buff_head deferred_tx;
426 u8 mac_queue;
427 bool no_queue = false; /* Marks if there is a problem with the queue */
428 u8 ac;
429
430 lockdep_assert_held(&mvm->mutex);
431
432 skb = skb_peek(&tid_data->deferred_tx_frames);
433 if (!skb)
434 return;
435 hdr = (void *)skb->data;
436
437 ac = iwl_mvm_tid_to_ac_queue(tid);
438 mac_queue = IEEE80211_SKB_CB(skb)->hw_queue;
439
440 if (tid_data->txq_id == IEEE80211_INVAL_HW_QUEUE &&
441 iwl_mvm_sta_alloc_queue(mvm, sta, ac, tid, hdr)) {
442 IWL_ERR(mvm,
443 "Can't alloc TXQ for sta %d tid %d - dropping frame\n",
444 mvmsta->sta_id, tid);
445
446 /*
447 * Mark queue as problematic so later the deferred traffic is
448 * freed, as we can do nothing with it
449 */
450 no_queue = true;
451 }
452
453 __skb_queue_head_init(&deferred_tx);
454
Liad Kaufmand2515a92016-03-23 16:31:08 +0200455 /* Disable bottom-halves when entering TX path */
456 local_bh_disable();
Liad Kaufman24afba72015-07-28 18:56:08 +0300457 spin_lock(&mvmsta->lock);
458 skb_queue_splice_init(&tid_data->deferred_tx_frames, &deferred_tx);
459 spin_unlock(&mvmsta->lock);
460
Liad Kaufman24afba72015-07-28 18:56:08 +0300461 while ((skb = __skb_dequeue(&deferred_tx)))
462 if (no_queue || iwl_mvm_tx_skb(mvm, skb, sta))
463 ieee80211_free_txskb(mvm->hw, skb);
464 local_bh_enable();
465
466 /* Wake queue */
467 iwl_mvm_start_mac_queues(mvm, BIT(mac_queue));
468}
469
470void iwl_mvm_add_new_dqa_stream_wk(struct work_struct *wk)
471{
472 struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm,
473 add_stream_wk);
474 struct ieee80211_sta *sta;
475 struct iwl_mvm_sta *mvmsta;
476 unsigned long deferred_tid_traffic;
477 int sta_id, tid;
478
479 mutex_lock(&mvm->mutex);
480
481 /* Go over all stations with deferred traffic */
482 for_each_set_bit(sta_id, mvm->sta_deferred_frames,
483 IWL_MVM_STATION_COUNT) {
484 clear_bit(sta_id, mvm->sta_deferred_frames);
485 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
486 lockdep_is_held(&mvm->mutex));
487 if (IS_ERR_OR_NULL(sta))
488 continue;
489
490 mvmsta = iwl_mvm_sta_from_mac80211(sta);
491 deferred_tid_traffic = mvmsta->deferred_traffic_tid_map;
492
493 for_each_set_bit(tid, &deferred_tid_traffic,
494 IWL_MAX_TID_COUNT + 1)
495 iwl_mvm_tx_deferred_stream(mvm, sta, tid);
496 }
497
498 mutex_unlock(&mvm->mutex);
499}
500
501static int iwl_mvm_reserve_sta_stream(struct iwl_mvm *mvm,
Liad Kaufmand5216a22015-08-09 15:50:51 +0300502 struct ieee80211_sta *sta,
503 enum nl80211_iftype vif_type)
Liad Kaufman24afba72015-07-28 18:56:08 +0300504{
505 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
506 int queue;
507
508 spin_lock_bh(&mvm->queue_info_lock);
509
510 /* Make sure we have free resources for this STA */
Liad Kaufmand5216a22015-08-09 15:50:51 +0300511 if (vif_type == NL80211_IFTYPE_STATION && !sta->tdls &&
512 !mvm->queue_info[IWL_MVM_DQA_BSS_CLIENT_QUEUE].hw_queue_refcount &&
Liad Kaufmancf961e12015-08-13 19:16:08 +0300513 (mvm->queue_info[IWL_MVM_DQA_BSS_CLIENT_QUEUE].status ==
514 IWL_MVM_QUEUE_FREE))
Liad Kaufmand5216a22015-08-09 15:50:51 +0300515 queue = IWL_MVM_DQA_BSS_CLIENT_QUEUE;
516 else
517 queue = iwl_mvm_find_free_queue(mvm, IWL_MVM_DQA_MIN_DATA_QUEUE,
518 IWL_MVM_DQA_MAX_DATA_QUEUE);
Liad Kaufman24afba72015-07-28 18:56:08 +0300519 if (queue < 0) {
520 spin_unlock_bh(&mvm->queue_info_lock);
521 IWL_ERR(mvm, "No available queues for new station\n");
522 return -ENOSPC;
523 }
Liad Kaufmancf961e12015-08-13 19:16:08 +0300524 mvm->queue_info[queue].status = IWL_MVM_QUEUE_RESERVED;
Liad Kaufman24afba72015-07-28 18:56:08 +0300525
526 spin_unlock_bh(&mvm->queue_info_lock);
527
528 mvmsta->reserved_queue = queue;
529
530 IWL_DEBUG_TX_QUEUES(mvm, "Reserving data queue #%d for sta_id %d\n",
531 queue, mvmsta->sta_id);
532
533 return 0;
534}
535
Johannes Berg8ca151b2013-01-24 14:25:36 +0100536int iwl_mvm_add_sta(struct iwl_mvm *mvm,
537 struct ieee80211_vif *vif,
538 struct ieee80211_sta *sta)
539{
540 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
Johannes Berg9d8ce6a2014-12-23 16:02:40 +0100541 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
Sara Sharona571f5f2015-12-07 12:50:58 +0200542 struct iwl_mvm_rxq_dup_data *dup_data;
Johannes Berg8ca151b2013-01-24 14:25:36 +0100543 int i, ret, sta_id;
544
545 lockdep_assert_held(&mvm->mutex);
546
547 if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
Eliad Pellerb92e6612014-01-23 17:58:23 +0200548 sta_id = iwl_mvm_find_free_sta_id(mvm,
549 ieee80211_vif_type_p2p(vif));
Johannes Berg8ca151b2013-01-24 14:25:36 +0100550 else
551 sta_id = mvm_sta->sta_id;
552
Johannes Berg36f46312015-03-10 20:32:08 +0100553 if (sta_id == IWL_MVM_STATION_COUNT)
Johannes Berg8ca151b2013-01-24 14:25:36 +0100554 return -ENOSPC;
555
556 spin_lock_init(&mvm_sta->lock);
557
558 mvm_sta->sta_id = sta_id;
559 mvm_sta->mac_id_n_color = FW_CMD_ID_AND_COLOR(mvmvif->id,
560 mvmvif->color);
561 mvm_sta->vif = vif;
562 mvm_sta->max_agg_bufsize = LINK_QUAL_AGG_FRAME_LIMIT_DEF;
Eytan Lifshitz9ee718a2013-05-19 19:14:41 +0300563 mvm_sta->tx_protection = 0;
564 mvm_sta->tt_tx_protection = false;
Johannes Berg8ca151b2013-01-24 14:25:36 +0100565
566 /* HW restart, don't assume the memory has been zeroed */
Emmanuel Grumbache3d4bc82013-05-07 14:08:24 +0300567 atomic_set(&mvm->pending_frames[sta_id], 0);
Liad Kaufman69191af2015-09-01 18:50:22 +0300568 mvm_sta->tid_disable_agg = 0xffff; /* No aggs at first */
Johannes Berg8ca151b2013-01-24 14:25:36 +0100569 mvm_sta->tfd_queue_msk = 0;
Arik Nemtsova0f6bf22014-09-21 19:10:04 +0300570
571 /* allocate new queues for a TDLS station */
572 if (sta->tdls) {
573 ret = iwl_mvm_tdls_sta_init(mvm, sta);
574 if (ret)
575 return ret;
Liad Kaufman24afba72015-07-28 18:56:08 +0300576 } else if (!iwl_mvm_is_dqa_supported(mvm)) {
Arik Nemtsova0f6bf22014-09-21 19:10:04 +0300577 for (i = 0; i < IEEE80211_NUM_ACS; i++)
578 if (vif->hw_queue[i] != IEEE80211_INVAL_HW_QUEUE)
579 mvm_sta->tfd_queue_msk |= BIT(vif->hw_queue[i]);
580 }
Johannes Berg8ca151b2013-01-24 14:25:36 +0100581
Johannes Berg6d9d32b2013-08-06 18:58:56 +0200582 /* for HW restart - reset everything but the sequence number */
Liad Kaufman24afba72015-07-28 18:56:08 +0300583 for (i = 0; i <= IWL_MAX_TID_COUNT; i++) {
Johannes Berg6d9d32b2013-08-06 18:58:56 +0200584 u16 seq = mvm_sta->tid_data[i].seq_number;
585 memset(&mvm_sta->tid_data[i], 0, sizeof(mvm_sta->tid_data[i]));
586 mvm_sta->tid_data[i].seq_number = seq;
Liad Kaufman24afba72015-07-28 18:56:08 +0300587
588 if (!iwl_mvm_is_dqa_supported(mvm))
589 continue;
590
591 /*
592 * Mark all queues for this STA as unallocated and defer TX
593 * frames until the queue is allocated
594 */
595 mvm_sta->tid_data[i].txq_id = IEEE80211_INVAL_HW_QUEUE;
596 skb_queue_head_init(&mvm_sta->tid_data[i].deferred_tx_frames);
Johannes Berg6d9d32b2013-08-06 18:58:56 +0200597 }
Liad Kaufman24afba72015-07-28 18:56:08 +0300598 mvm_sta->deferred_traffic_tid_map = 0;
Eyal Shapiraefed6642014-09-14 15:58:53 +0300599 mvm_sta->agg_tids = 0;
Johannes Berg8ca151b2013-01-24 14:25:36 +0100600
Sara Sharona571f5f2015-12-07 12:50:58 +0200601 if (iwl_mvm_has_new_rx_api(mvm) &&
602 !test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
603 dup_data = kcalloc(mvm->trans->num_rx_queues,
604 sizeof(*dup_data),
605 GFP_KERNEL);
606 if (!dup_data)
607 return -ENOMEM;
608 mvm_sta->dup_data = dup_data;
609 }
610
Liad Kaufman24afba72015-07-28 18:56:08 +0300611 if (iwl_mvm_is_dqa_supported(mvm)) {
Liad Kaufmand5216a22015-08-09 15:50:51 +0300612 ret = iwl_mvm_reserve_sta_stream(mvm, sta,
613 ieee80211_vif_type_p2p(vif));
Liad Kaufman24afba72015-07-28 18:56:08 +0300614 if (ret)
615 goto err;
616 }
617
618 ret = iwl_mvm_sta_send_to_fw(mvm, sta, false, 0);
Johannes Berg8ca151b2013-01-24 14:25:36 +0100619 if (ret)
Arik Nemtsova0f6bf22014-09-21 19:10:04 +0300620 goto err;
Johannes Berg8ca151b2013-01-24 14:25:36 +0100621
Johannes Berg9e848012014-08-04 14:33:42 +0200622 if (vif->type == NL80211_IFTYPE_STATION) {
623 if (!sta->tdls) {
624 WARN_ON(mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT);
625 mvmvif->ap_sta_id = sta_id;
626 } else {
627 WARN_ON(mvmvif->ap_sta_id == IWL_MVM_STATION_COUNT);
628 }
629 }
Johannes Berg8ca151b2013-01-24 14:25:36 +0100630
631 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta_id], sta);
632
633 return 0;
Arik Nemtsova0f6bf22014-09-21 19:10:04 +0300634
635err:
636 iwl_mvm_tdls_sta_deinit(mvm, sta);
637 return ret;
Johannes Berg8ca151b2013-01-24 14:25:36 +0100638}
639
Johannes Berg7a453972013-02-12 13:10:44 +0100640int iwl_mvm_update_sta(struct iwl_mvm *mvm,
641 struct ieee80211_vif *vif,
642 struct ieee80211_sta *sta)
643{
Liad Kaufman24afba72015-07-28 18:56:08 +0300644 return iwl_mvm_sta_send_to_fw(mvm, sta, true, 0);
Johannes Berg7a453972013-02-12 13:10:44 +0100645}
646
Johannes Berg8ca151b2013-01-24 14:25:36 +0100647int iwl_mvm_drain_sta(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta,
648 bool drain)
649{
Emmanuel Grumbachf9dc0002014-03-30 09:53:27 +0300650 struct iwl_mvm_add_sta_cmd cmd = {};
Johannes Berg8ca151b2013-01-24 14:25:36 +0100651 int ret;
652 u32 status;
653
654 lockdep_assert_held(&mvm->mutex);
655
656 cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color);
657 cmd.sta_id = mvmsta->sta_id;
658 cmd.add_modify = STA_MODE_MODIFY;
659 cmd.station_flags = drain ? cpu_to_le32(STA_FLG_DRAIN_FLOW) : 0;
660 cmd.station_flags_msk = cpu_to_le32(STA_FLG_DRAIN_FLOW);
661
662 status = ADD_STA_SUCCESS;
Sara Sharon854c5702016-01-26 13:17:47 +0200663 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
664 iwl_mvm_add_sta_cmd_size(mvm),
Emmanuel Grumbachf9dc0002014-03-30 09:53:27 +0300665 &cmd, &status);
Johannes Berg8ca151b2013-01-24 14:25:36 +0100666 if (ret)
667 return ret;
668
Sara Sharon837c4da2016-01-07 16:50:45 +0200669 switch (status & IWL_ADD_STA_STATUS_MASK) {
Johannes Berg8ca151b2013-01-24 14:25:36 +0100670 case ADD_STA_SUCCESS:
671 IWL_DEBUG_INFO(mvm, "Frames for staid %d will drained in fw\n",
672 mvmsta->sta_id);
673 break;
674 default:
675 ret = -EIO;
676 IWL_ERR(mvm, "Couldn't drain frames for staid %d\n",
677 mvmsta->sta_id);
678 break;
679 }
680
681 return ret;
682}
683
684/*
685 * Remove a station from the FW table. Before sending the command to remove
686 * the station validate that the station is indeed known to the driver (sanity
687 * only).
688 */
689static int iwl_mvm_rm_sta_common(struct iwl_mvm *mvm, u8 sta_id)
690{
691 struct ieee80211_sta *sta;
692 struct iwl_mvm_rm_sta_cmd rm_sta_cmd = {
693 .sta_id = sta_id,
694 };
695 int ret;
696
697 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
698 lockdep_is_held(&mvm->mutex));
699
700 /* Note: internal stations are marked as error values */
701 if (!sta) {
702 IWL_ERR(mvm, "Invalid station id\n");
703 return -EINVAL;
704 }
705
Emmanuel Grumbacha1022922014-05-12 11:36:41 +0300706 ret = iwl_mvm_send_cmd_pdu(mvm, REMOVE_STA, 0,
Johannes Berg8ca151b2013-01-24 14:25:36 +0100707 sizeof(rm_sta_cmd), &rm_sta_cmd);
708 if (ret) {
709 IWL_ERR(mvm, "Failed to remove station. Id=%d\n", sta_id);
710 return ret;
711 }
712
713 return 0;
714}
715
716void iwl_mvm_sta_drained_wk(struct work_struct *wk)
717{
718 struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm, sta_drained_wk);
719 u8 sta_id;
720
721 /*
722 * The mutex is needed because of the SYNC cmd, but not only: if the
723 * work would run concurrently with iwl_mvm_rm_sta, it would run before
724 * iwl_mvm_rm_sta sets the station as busy, and exit. Then
725 * iwl_mvm_rm_sta would set the station as busy, and nobody will clean
726 * that later.
727 */
728 mutex_lock(&mvm->mutex);
729
730 for_each_set_bit(sta_id, mvm->sta_drained, IWL_MVM_STATION_COUNT) {
731 int ret;
732 struct ieee80211_sta *sta =
733 rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
734 lockdep_is_held(&mvm->mutex));
735
Johannes Berg1ddbbb02013-12-04 22:39:17 +0100736 /*
737 * This station is in use or RCU-removed; the latter happens in
738 * managed mode, where mac80211 removes the station before we
739 * can remove it from firmware (we can only do that after the
740 * MAC is marked unassociated), and possibly while the deauth
741 * frame to disconnect from the AP is still queued. Then, the
742 * station pointer is -ENOENT when the last skb is reclaimed.
743 */
744 if (!IS_ERR(sta) || PTR_ERR(sta) == -ENOENT)
Johannes Berg8ca151b2013-01-24 14:25:36 +0100745 continue;
746
747 if (PTR_ERR(sta) == -EINVAL) {
748 IWL_ERR(mvm, "Drained sta %d, but it is internal?\n",
749 sta_id);
750 continue;
751 }
752
753 if (!sta) {
754 IWL_ERR(mvm, "Drained sta %d, but it was NULL?\n",
755 sta_id);
756 continue;
757 }
758
759 WARN_ON(PTR_ERR(sta) != -EBUSY);
760 /* This station was removed and we waited until it got drained,
761 * we can now proceed and remove it.
762 */
763 ret = iwl_mvm_rm_sta_common(mvm, sta_id);
764 if (ret) {
765 IWL_ERR(mvm,
766 "Couldn't remove sta %d after it was drained\n",
767 sta_id);
768 continue;
769 }
Monam Agarwalc531c772014-03-24 00:05:56 +0530770 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta_id], NULL);
Johannes Berg8ca151b2013-01-24 14:25:36 +0100771 clear_bit(sta_id, mvm->sta_drained);
Arik Nemtsova0f6bf22014-09-21 19:10:04 +0300772
773 if (mvm->tfd_drained[sta_id]) {
774 unsigned long i, msk = mvm->tfd_drained[sta_id];
775
Emmanuel Grumbacha4ca3ed2015-01-20 17:07:10 +0200776 for_each_set_bit(i, &msk, sizeof(msk) * BITS_PER_BYTE)
Arik Nemtsov06ecdba2015-10-12 14:47:11 +0300777 iwl_mvm_disable_txq(mvm, i, i,
778 IWL_MAX_TID_COUNT, 0);
Arik Nemtsova0f6bf22014-09-21 19:10:04 +0300779
780 mvm->tfd_drained[sta_id] = 0;
781 IWL_DEBUG_TDLS(mvm, "Drained sta %d, with queues %ld\n",
782 sta_id, msk);
783 }
Johannes Berg8ca151b2013-01-24 14:25:36 +0100784 }
785
786 mutex_unlock(&mvm->mutex);
787}
788
Liad Kaufman24afba72015-07-28 18:56:08 +0300789static void iwl_mvm_disable_sta_queues(struct iwl_mvm *mvm,
790 struct ieee80211_vif *vif,
791 struct iwl_mvm_sta *mvm_sta)
792{
793 int ac;
794 int i;
795
796 lockdep_assert_held(&mvm->mutex);
797
798 for (i = 0; i < ARRAY_SIZE(mvm_sta->tid_data); i++) {
799 if (mvm_sta->tid_data[i].txq_id == IEEE80211_INVAL_HW_QUEUE)
800 continue;
801
802 ac = iwl_mvm_tid_to_ac_queue(i);
803 iwl_mvm_disable_txq(mvm, mvm_sta->tid_data[i].txq_id,
804 vif->hw_queue[ac], i, 0);
805 mvm_sta->tid_data[i].txq_id = IEEE80211_INVAL_HW_QUEUE;
806 }
807}
808
Johannes Berg8ca151b2013-01-24 14:25:36 +0100809int iwl_mvm_rm_sta(struct iwl_mvm *mvm,
810 struct ieee80211_vif *vif,
811 struct ieee80211_sta *sta)
812{
813 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
Johannes Berg9d8ce6a2014-12-23 16:02:40 +0100814 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
Johannes Berg8ca151b2013-01-24 14:25:36 +0100815 int ret;
816
817 lockdep_assert_held(&mvm->mutex);
818
Sara Sharona571f5f2015-12-07 12:50:58 +0200819 if (iwl_mvm_has_new_rx_api(mvm))
820 kfree(mvm_sta->dup_data);
821
Johannes Berg8ca151b2013-01-24 14:25:36 +0100822 if (vif->type == NL80211_IFTYPE_STATION &&
823 mvmvif->ap_sta_id == mvm_sta->sta_id) {
Emmanuel Grumbachfe92e322015-03-11 09:34:31 +0200824 ret = iwl_mvm_drain_sta(mvm, mvm_sta, true);
825 if (ret)
826 return ret;
Emmanuel Grumbach80d85652013-02-19 15:32:42 +0200827 /* flush its queues here since we are freeing mvm_sta */
Luca Coelho5888a402015-10-06 09:54:57 +0300828 ret = iwl_mvm_flush_tx_path(mvm, mvm_sta->tfd_queue_msk, 0);
Emmanuel Grumbachfe92e322015-03-11 09:34:31 +0200829 if (ret)
830 return ret;
831 ret = iwl_trans_wait_tx_queue_empty(mvm->trans,
832 mvm_sta->tfd_queue_msk);
833 if (ret)
834 return ret;
835 ret = iwl_mvm_drain_sta(mvm, mvm_sta, false);
Emmanuel Grumbach80d85652013-02-19 15:32:42 +0200836
Liad Kaufman24afba72015-07-28 18:56:08 +0300837 /* If DQA is supported - the queues can be disabled now */
838 if (iwl_mvm_is_dqa_supported(mvm))
839 iwl_mvm_disable_sta_queues(mvm, vif, mvm_sta);
840
Johannes Berg8ca151b2013-01-24 14:25:36 +0100841 /* if we are associated - we can't remove the AP STA now */
842 if (vif->bss_conf.assoc)
843 return ret;
844
845 /* unassoc - go ahead - remove the AP STA now */
846 mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
Eliad Peller37577fe2013-12-05 17:19:39 +0200847
848 /* clear d0i3_ap_sta_id if no longer relevant */
849 if (mvm->d0i3_ap_sta_id == mvm_sta->sta_id)
850 mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
Johannes Berg8ca151b2013-01-24 14:25:36 +0100851 }
852
853 /*
Arik Nemtsov1d3c3f62014-10-23 18:03:10 +0300854 * This shouldn't happen - the TDLS channel switch should be canceled
855 * before the STA is removed.
856 */
857 if (WARN_ON_ONCE(mvm->tdls_cs.peer.sta_id == mvm_sta->sta_id)) {
858 mvm->tdls_cs.peer.sta_id = IWL_MVM_STATION_COUNT;
859 cancel_delayed_work(&mvm->tdls_cs.dwork);
860 }
861
862 /*
Emmanuel Grumbache3d4bc82013-05-07 14:08:24 +0300863 * Make sure that the tx response code sees the station as -EBUSY and
864 * calls the drain worker.
865 */
866 spin_lock_bh(&mvm_sta->lock);
867 /*
Johannes Berg8ca151b2013-01-24 14:25:36 +0100868 * There are frames pending on the AC queues for this station.
869 * We need to wait until all the frames are drained...
870 */
Emmanuel Grumbache3d4bc82013-05-07 14:08:24 +0300871 if (atomic_read(&mvm->pending_frames[mvm_sta->sta_id])) {
Johannes Berg8ca151b2013-01-24 14:25:36 +0100872 rcu_assign_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id],
873 ERR_PTR(-EBUSY));
Emmanuel Grumbache3d4bc82013-05-07 14:08:24 +0300874 spin_unlock_bh(&mvm_sta->lock);
Arik Nemtsova0f6bf22014-09-21 19:10:04 +0300875
876 /* disable TDLS sta queues on drain complete */
877 if (sta->tdls) {
878 mvm->tfd_drained[mvm_sta->sta_id] =
879 mvm_sta->tfd_queue_msk;
880 IWL_DEBUG_TDLS(mvm, "Draining TDLS sta %d\n",
881 mvm_sta->sta_id);
882 }
883
Emmanuel Grumbache3d4bc82013-05-07 14:08:24 +0300884 ret = iwl_mvm_drain_sta(mvm, mvm_sta, true);
Johannes Berg8ca151b2013-01-24 14:25:36 +0100885 } else {
Emmanuel Grumbache3d4bc82013-05-07 14:08:24 +0300886 spin_unlock_bh(&mvm_sta->lock);
Arik Nemtsova0f6bf22014-09-21 19:10:04 +0300887
888 if (sta->tdls)
889 iwl_mvm_tdls_sta_deinit(mvm, sta);
890
Johannes Berg8ca151b2013-01-24 14:25:36 +0100891 ret = iwl_mvm_rm_sta_common(mvm, mvm_sta->sta_id);
Monam Agarwalc531c772014-03-24 00:05:56 +0530892 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[mvm_sta->sta_id], NULL);
Johannes Berg8ca151b2013-01-24 14:25:36 +0100893 }
894
895 return ret;
896}
897
898int iwl_mvm_rm_sta_id(struct iwl_mvm *mvm,
899 struct ieee80211_vif *vif,
900 u8 sta_id)
901{
902 int ret = iwl_mvm_rm_sta_common(mvm, sta_id);
903
904 lockdep_assert_held(&mvm->mutex);
905
Monam Agarwalc531c772014-03-24 00:05:56 +0530906 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta_id], NULL);
Johannes Berg8ca151b2013-01-24 14:25:36 +0100907 return ret;
908}
909
Chaya Rachel Ivgi0e39eb02015-12-03 15:51:46 +0200910int iwl_mvm_allocate_int_sta(struct iwl_mvm *mvm,
911 struct iwl_mvm_int_sta *sta,
912 u32 qmask, enum nl80211_iftype iftype)
Johannes Berg8ca151b2013-01-24 14:25:36 +0100913{
914 if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
Eliad Pellerb92e6612014-01-23 17:58:23 +0200915 sta->sta_id = iwl_mvm_find_free_sta_id(mvm, iftype);
Johannes Berg8ca151b2013-01-24 14:25:36 +0100916 if (WARN_ON_ONCE(sta->sta_id == IWL_MVM_STATION_COUNT))
917 return -ENOSPC;
918 }
919
920 sta->tfd_queue_msk = qmask;
921
922 /* put a non-NULL value so iterating over the stations won't stop */
923 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta->sta_id], ERR_PTR(-EINVAL));
924 return 0;
925}
926
Johannes Berg712b24a2014-08-04 14:14:14 +0200927static void iwl_mvm_dealloc_int_sta(struct iwl_mvm *mvm,
928 struct iwl_mvm_int_sta *sta)
Johannes Berg8ca151b2013-01-24 14:25:36 +0100929{
Monam Agarwalc531c772014-03-24 00:05:56 +0530930 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta->sta_id], NULL);
Johannes Berg8ca151b2013-01-24 14:25:36 +0100931 memset(sta, 0, sizeof(struct iwl_mvm_int_sta));
932 sta->sta_id = IWL_MVM_STATION_COUNT;
933}
934
935static int iwl_mvm_add_int_sta_common(struct iwl_mvm *mvm,
936 struct iwl_mvm_int_sta *sta,
937 const u8 *addr,
938 u16 mac_id, u16 color)
939{
Emmanuel Grumbachf9dc0002014-03-30 09:53:27 +0300940 struct iwl_mvm_add_sta_cmd cmd;
Johannes Berg8ca151b2013-01-24 14:25:36 +0100941 int ret;
942 u32 status;
943
944 lockdep_assert_held(&mvm->mutex);
945
Emmanuel Grumbachf9dc0002014-03-30 09:53:27 +0300946 memset(&cmd, 0, sizeof(cmd));
Johannes Berg8ca151b2013-01-24 14:25:36 +0100947 cmd.sta_id = sta->sta_id;
948 cmd.mac_id_n_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(mac_id,
949 color));
950
951 cmd.tfd_queue_msk = cpu_to_le32(sta->tfd_queue_msk);
Liad Kaufmancf0cda12015-09-24 10:44:12 +0200952 cmd.tid_disable_tx = cpu_to_le16(0xffff);
Johannes Berg8ca151b2013-01-24 14:25:36 +0100953
954 if (addr)
955 memcpy(cmd.addr, addr, ETH_ALEN);
956
Sara Sharon854c5702016-01-26 13:17:47 +0200957 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
958 iwl_mvm_add_sta_cmd_size(mvm),
Emmanuel Grumbachf9dc0002014-03-30 09:53:27 +0300959 &cmd, &status);
Johannes Berg8ca151b2013-01-24 14:25:36 +0100960 if (ret)
961 return ret;
962
Sara Sharon837c4da2016-01-07 16:50:45 +0200963 switch (status & IWL_ADD_STA_STATUS_MASK) {
Johannes Berg8ca151b2013-01-24 14:25:36 +0100964 case ADD_STA_SUCCESS:
965 IWL_DEBUG_INFO(mvm, "Internal station added.\n");
966 return 0;
967 default:
968 ret = -EIO;
969 IWL_ERR(mvm, "Add internal station failed, status=0x%x\n",
970 status);
971 break;
972 }
973 return ret;
974}
975
976int iwl_mvm_add_aux_sta(struct iwl_mvm *mvm)
977{
Emmanuel Grumbach4cf677f2015-01-12 14:38:29 +0200978 unsigned int wdg_timeout = iwlmvm_mod_params.tfd_q_hang_detect ?
979 mvm->cfg->base_params->wd_timeout :
980 IWL_WATCHDOG_DISABLED;
Johannes Berg8ca151b2013-01-24 14:25:36 +0100981 int ret;
982
983 lockdep_assert_held(&mvm->mutex);
984
Ariej Marjieh7da91b02014-07-07 12:09:40 +0300985 /* Map Aux queue to fifo - needs to happen before adding Aux station */
Liad Kaufman4ecafae2015-07-14 13:36:18 +0300986 iwl_mvm_enable_ac_txq(mvm, mvm->aux_queue, mvm->aux_queue,
Liad Kaufman5c1156e2015-07-22 17:59:53 +0300987 IWL_MVM_TX_FIFO_MCAST, 0, wdg_timeout);
Ariej Marjieh7da91b02014-07-07 12:09:40 +0300988
989 /* Allocate aux station and assign to it the aux queue */
990 ret = iwl_mvm_allocate_int_sta(mvm, &mvm->aux_sta, BIT(mvm->aux_queue),
Eliad Pellerb92e6612014-01-23 17:58:23 +0200991 NL80211_IFTYPE_UNSPECIFIED);
Johannes Berg8ca151b2013-01-24 14:25:36 +0100992 if (ret)
993 return ret;
994
995 ret = iwl_mvm_add_int_sta_common(mvm, &mvm->aux_sta, NULL,
996 MAC_INDEX_AUX, 0);
997
998 if (ret)
999 iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta);
1000 return ret;
1001}
1002
Chaya Rachel Ivgi0e39eb02015-12-03 15:51:46 +02001003int iwl_mvm_add_snif_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1004{
1005 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1006
1007 lockdep_assert_held(&mvm->mutex);
1008 return iwl_mvm_add_int_sta_common(mvm, &mvm->snif_sta, vif->addr,
1009 mvmvif->id, 0);
1010}
1011
1012int iwl_mvm_rm_snif_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1013{
1014 int ret;
1015
1016 lockdep_assert_held(&mvm->mutex);
1017
1018 ret = iwl_mvm_rm_sta_common(mvm, mvm->snif_sta.sta_id);
1019 if (ret)
1020 IWL_WARN(mvm, "Failed sending remove station\n");
1021
1022 return ret;
1023}
1024
1025void iwl_mvm_dealloc_snif_sta(struct iwl_mvm *mvm)
1026{
1027 iwl_mvm_dealloc_int_sta(mvm, &mvm->snif_sta);
1028}
1029
Johannes Berg712b24a2014-08-04 14:14:14 +02001030void iwl_mvm_del_aux_sta(struct iwl_mvm *mvm)
1031{
1032 lockdep_assert_held(&mvm->mutex);
1033
1034 iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta);
1035}
1036
Johannes Berg8ca151b2013-01-24 14:25:36 +01001037/*
1038 * Send the add station command for the vif's broadcast station.
1039 * Assumes that the station was already allocated.
1040 *
1041 * @mvm: the mvm component
1042 * @vif: the interface to which the broadcast station is added
1043 * @bsta: the broadcast station to add.
1044 */
Johannes Berg013290a2014-08-04 13:38:48 +02001045int iwl_mvm_send_add_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
Johannes Berg8ca151b2013-01-24 14:25:36 +01001046{
1047 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
Johannes Berg013290a2014-08-04 13:38:48 +02001048 struct iwl_mvm_int_sta *bsta = &mvmvif->bcast_sta;
Johannes Berg5023d962013-07-31 14:07:43 +02001049 static const u8 _baddr[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
Johannes Berga4243402014-01-20 23:46:38 +01001050 const u8 *baddr = _baddr;
Johannes Berg8ca151b2013-01-24 14:25:36 +01001051
1052 lockdep_assert_held(&mvm->mutex);
1053
Liad Kaufmande24f632015-08-04 15:19:18 +03001054 if (iwl_mvm_is_dqa_supported(mvm)) {
1055 struct iwl_trans_txq_scd_cfg cfg = {
1056 .fifo = IWL_MVM_TX_FIFO_VO,
1057 .sta_id = mvmvif->bcast_sta.sta_id,
1058 .tid = IWL_MAX_TID_COUNT,
1059 .aggregate = false,
1060 .frame_limit = IWL_FRAME_LIMIT,
1061 };
1062 unsigned int wdg_timeout =
1063 iwl_mvm_get_wd_timeout(mvm, vif, false, false);
1064 int queue;
1065
1066 if ((vif->type == NL80211_IFTYPE_AP) &&
1067 (mvmvif->bcast_sta.tfd_queue_msk &
1068 BIT(IWL_MVM_DQA_AP_PROBE_RESP_QUEUE)))
1069 queue = IWL_MVM_DQA_AP_PROBE_RESP_QUEUE;
Liad Kaufman4c965132015-08-09 19:26:56 +03001070 else if ((vif->type == NL80211_IFTYPE_P2P_DEVICE) &&
1071 (mvmvif->bcast_sta.tfd_queue_msk &
1072 BIT(IWL_MVM_DQA_P2P_DEVICE_QUEUE)))
1073 queue = IWL_MVM_DQA_P2P_DEVICE_QUEUE;
Liad Kaufmande24f632015-08-04 15:19:18 +03001074 else if (WARN(1, "Missed required TXQ for adding bcast STA\n"))
1075 return -EINVAL;
1076
1077 iwl_mvm_enable_txq(mvm, queue, vif->hw_queue[0], 0, &cfg,
1078 wdg_timeout);
1079 }
1080
Johannes Berg5023d962013-07-31 14:07:43 +02001081 if (vif->type == NL80211_IFTYPE_ADHOC)
1082 baddr = vif->bss_conf.bssid;
1083
Johannes Berg8ca151b2013-01-24 14:25:36 +01001084 if (WARN_ON_ONCE(bsta->sta_id == IWL_MVM_STATION_COUNT))
1085 return -ENOSPC;
1086
1087 return iwl_mvm_add_int_sta_common(mvm, bsta, baddr,
1088 mvmvif->id, mvmvif->color);
1089}
1090
1091/* Send the FW a request to remove the station from it's internal data
1092 * structures, but DO NOT remove the entry from the local data structures. */
Johannes Berg013290a2014-08-04 13:38:48 +02001093int iwl_mvm_send_rm_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
Johannes Berg8ca151b2013-01-24 14:25:36 +01001094{
Johannes Berg013290a2014-08-04 13:38:48 +02001095 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
Johannes Berg8ca151b2013-01-24 14:25:36 +01001096 int ret;
1097
1098 lockdep_assert_held(&mvm->mutex);
1099
Johannes Berg013290a2014-08-04 13:38:48 +02001100 ret = iwl_mvm_rm_sta_common(mvm, mvmvif->bcast_sta.sta_id);
Johannes Berg8ca151b2013-01-24 14:25:36 +01001101 if (ret)
1102 IWL_WARN(mvm, "Failed sending remove station\n");
1103 return ret;
1104}
1105
Johannes Berg013290a2014-08-04 13:38:48 +02001106int iwl_mvm_alloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1107{
1108 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
Liad Kaufmande24f632015-08-04 15:19:18 +03001109 u32 qmask = 0;
Johannes Berg013290a2014-08-04 13:38:48 +02001110
1111 lockdep_assert_held(&mvm->mutex);
1112
Liad Kaufmande24f632015-08-04 15:19:18 +03001113 if (!iwl_mvm_is_dqa_supported(mvm))
1114 qmask = iwl_mvm_mac_get_queues_mask(vif);
Johannes Berg013290a2014-08-04 13:38:48 +02001115
Liad Kaufmande24f632015-08-04 15:19:18 +03001116 if (vif->type == NL80211_IFTYPE_AP) {
1117 /*
1118 * The firmware defines the TFD queue mask to only be relevant
1119 * for *unicast* queues, so the multicast (CAB) queue shouldn't
1120 * be included.
1121 */
Johannes Berg013290a2014-08-04 13:38:48 +02001122 qmask &= ~BIT(vif->cab_queue);
1123
Liad Kaufmande24f632015-08-04 15:19:18 +03001124 if (iwl_mvm_is_dqa_supported(mvm))
1125 qmask |= BIT(IWL_MVM_DQA_AP_PROBE_RESP_QUEUE);
Liad Kaufman4c965132015-08-09 19:26:56 +03001126 } else if (iwl_mvm_is_dqa_supported(mvm) &&
1127 vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1128 qmask |= BIT(IWL_MVM_DQA_P2P_DEVICE_QUEUE);
Liad Kaufmande24f632015-08-04 15:19:18 +03001129 }
1130
Johannes Berg013290a2014-08-04 13:38:48 +02001131 return iwl_mvm_allocate_int_sta(mvm, &mvmvif->bcast_sta, qmask,
1132 ieee80211_vif_type_p2p(vif));
1133}
1134
Johannes Berg8ca151b2013-01-24 14:25:36 +01001135/* Allocate a new station entry for the broadcast station to the given vif,
1136 * and send it to the FW.
1137 * Note that each P2P mac should have its own broadcast station.
1138 *
1139 * @mvm: the mvm component
1140 * @vif: the interface to which the broadcast station is added
1141 * @bsta: the broadcast station to add. */
Johannes Berg013290a2014-08-04 13:38:48 +02001142int iwl_mvm_add_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
Johannes Berg8ca151b2013-01-24 14:25:36 +01001143{
1144 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
Johannes Berg013290a2014-08-04 13:38:48 +02001145 struct iwl_mvm_int_sta *bsta = &mvmvif->bcast_sta;
Johannes Berg8ca151b2013-01-24 14:25:36 +01001146 int ret;
1147
1148 lockdep_assert_held(&mvm->mutex);
1149
Johannes Berg013290a2014-08-04 13:38:48 +02001150 ret = iwl_mvm_alloc_bcast_sta(mvm, vif);
Johannes Berg8ca151b2013-01-24 14:25:36 +01001151 if (ret)
1152 return ret;
1153
Johannes Berg013290a2014-08-04 13:38:48 +02001154 ret = iwl_mvm_send_add_bcast_sta(mvm, vif);
Johannes Berg8ca151b2013-01-24 14:25:36 +01001155
1156 if (ret)
1157 iwl_mvm_dealloc_int_sta(mvm, bsta);
Johannes Berg013290a2014-08-04 13:38:48 +02001158
Johannes Berg8ca151b2013-01-24 14:25:36 +01001159 return ret;
1160}
1161
Johannes Berg013290a2014-08-04 13:38:48 +02001162void iwl_mvm_dealloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1163{
1164 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1165
1166 iwl_mvm_dealloc_int_sta(mvm, &mvmvif->bcast_sta);
1167}
1168
Johannes Berg8ca151b2013-01-24 14:25:36 +01001169/*
1170 * Send the FW a request to remove the station from it's internal data
1171 * structures, and in addition remove it from the local data structure.
1172 */
Johannes Berg013290a2014-08-04 13:38:48 +02001173int iwl_mvm_rm_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
Johannes Berg8ca151b2013-01-24 14:25:36 +01001174{
1175 int ret;
1176
1177 lockdep_assert_held(&mvm->mutex);
1178
Johannes Berg013290a2014-08-04 13:38:48 +02001179 ret = iwl_mvm_send_rm_bcast_sta(mvm, vif);
Johannes Berg8ca151b2013-01-24 14:25:36 +01001180
Johannes Berg013290a2014-08-04 13:38:48 +02001181 iwl_mvm_dealloc_bcast_sta(mvm, vif);
1182
Johannes Berg8ca151b2013-01-24 14:25:36 +01001183 return ret;
1184}
1185
Emmanuel Grumbach113a0442013-07-02 14:16:38 +03001186#define IWL_MAX_RX_BA_SESSIONS 16
1187
Sara Sharonb915c102016-03-23 16:32:02 +02001188static void iwl_mvm_sync_rxq_del_ba(struct iwl_mvm *mvm, u8 baid)
Sara Sharon10b2b202016-03-20 16:23:41 +02001189{
Sara Sharonb915c102016-03-23 16:32:02 +02001190 struct iwl_mvm_delba_notif notif = {
1191 .metadata.type = IWL_MVM_RXQ_NOTIF_DEL_BA,
1192 .metadata.sync = 1,
1193 .delba.baid = baid,
Sara Sharon10b2b202016-03-20 16:23:41 +02001194 };
Sara Sharonb915c102016-03-23 16:32:02 +02001195 iwl_mvm_sync_rx_queues_internal(mvm, (void *)&notif, sizeof(notif));
1196};
Sara Sharon10b2b202016-03-20 16:23:41 +02001197
Sara Sharonb915c102016-03-23 16:32:02 +02001198static void iwl_mvm_free_reorder(struct iwl_mvm *mvm,
1199 struct iwl_mvm_baid_data *data)
1200{
1201 int i;
1202
1203 iwl_mvm_sync_rxq_del_ba(mvm, data->baid);
1204
1205 for (i = 0; i < mvm->trans->num_rx_queues; i++) {
1206 int j;
1207 struct iwl_mvm_reorder_buffer *reorder_buf =
1208 &data->reorder_buf[i];
1209
Sara Sharon06904052016-02-28 20:28:17 +02001210 spin_lock_bh(&reorder_buf->lock);
1211 if (likely(!reorder_buf->num_stored)) {
1212 spin_unlock_bh(&reorder_buf->lock);
Sara Sharonb915c102016-03-23 16:32:02 +02001213 continue;
Sara Sharon06904052016-02-28 20:28:17 +02001214 }
Sara Sharonb915c102016-03-23 16:32:02 +02001215
1216 /*
1217 * This shouldn't happen in regular DELBA since the internal
1218 * delBA notification should trigger a release of all frames in
1219 * the reorder buffer.
1220 */
1221 WARN_ON(1);
1222
1223 for (j = 0; j < reorder_buf->buf_size; j++)
1224 __skb_queue_purge(&reorder_buf->entries[j]);
Sara Sharon06904052016-02-28 20:28:17 +02001225 /*
1226 * Prevent timer re-arm. This prevents a very far fetched case
1227 * where we timed out on the notification. There may be prior
1228 * RX frames pending in the RX queue before the notification
1229 * that might get processed between now and the actual deletion
1230 * and we would re-arm the timer although we are deleting the
1231 * reorder buffer.
1232 */
1233 reorder_buf->removed = true;
1234 spin_unlock_bh(&reorder_buf->lock);
1235 del_timer_sync(&reorder_buf->reorder_timer);
Sara Sharonb915c102016-03-23 16:32:02 +02001236 }
1237}
1238
1239static void iwl_mvm_init_reorder_buffer(struct iwl_mvm *mvm,
1240 u32 sta_id,
1241 struct iwl_mvm_baid_data *data,
1242 u16 ssn, u8 buf_size)
1243{
1244 int i;
1245
1246 for (i = 0; i < mvm->trans->num_rx_queues; i++) {
1247 struct iwl_mvm_reorder_buffer *reorder_buf =
1248 &data->reorder_buf[i];
1249 int j;
1250
1251 reorder_buf->num_stored = 0;
1252 reorder_buf->head_sn = ssn;
1253 reorder_buf->buf_size = buf_size;
Sara Sharon06904052016-02-28 20:28:17 +02001254 /* rx reorder timer */
1255 reorder_buf->reorder_timer.function =
1256 iwl_mvm_reorder_timer_expired;
1257 reorder_buf->reorder_timer.data = (unsigned long)reorder_buf;
1258 init_timer(&reorder_buf->reorder_timer);
1259 spin_lock_init(&reorder_buf->lock);
1260 reorder_buf->mvm = mvm;
Sara Sharonb915c102016-03-23 16:32:02 +02001261 reorder_buf->queue = i;
1262 reorder_buf->sta_id = sta_id;
1263 for (j = 0; j < reorder_buf->buf_size; j++)
1264 __skb_queue_head_init(&reorder_buf->entries[j]);
1265 }
Sara Sharon10b2b202016-03-20 16:23:41 +02001266}
1267
Johannes Berg8ca151b2013-01-24 14:25:36 +01001268int iwl_mvm_sta_rx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
Sara Sharon10b2b202016-03-20 16:23:41 +02001269 int tid, u16 ssn, bool start, u8 buf_size, u16 timeout)
Johannes Berg8ca151b2013-01-24 14:25:36 +01001270{
Johannes Berg9d8ce6a2014-12-23 16:02:40 +01001271 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
Emmanuel Grumbachf9dc0002014-03-30 09:53:27 +03001272 struct iwl_mvm_add_sta_cmd cmd = {};
Sara Sharon10b2b202016-03-20 16:23:41 +02001273 struct iwl_mvm_baid_data *baid_data = NULL;
Johannes Berg8ca151b2013-01-24 14:25:36 +01001274 int ret;
1275 u32 status;
1276
1277 lockdep_assert_held(&mvm->mutex);
1278
Emmanuel Grumbach113a0442013-07-02 14:16:38 +03001279 if (start && mvm->rx_ba_sessions >= IWL_MAX_RX_BA_SESSIONS) {
1280 IWL_WARN(mvm, "Not enough RX BA SESSIONS\n");
1281 return -ENOSPC;
1282 }
1283
Sara Sharon10b2b202016-03-20 16:23:41 +02001284 if (iwl_mvm_has_new_rx_api(mvm) && start) {
1285 /*
1286 * Allocate here so if allocation fails we can bail out early
1287 * before starting the BA session in the firmware
1288 */
Sara Sharonb915c102016-03-23 16:32:02 +02001289 baid_data = kzalloc(sizeof(*baid_data) +
1290 mvm->trans->num_rx_queues *
1291 sizeof(baid_data->reorder_buf[0]),
1292 GFP_KERNEL);
Sara Sharon10b2b202016-03-20 16:23:41 +02001293 if (!baid_data)
1294 return -ENOMEM;
1295 }
1296
Johannes Berg8ca151b2013-01-24 14:25:36 +01001297 cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color);
1298 cmd.sta_id = mvm_sta->sta_id;
1299 cmd.add_modify = STA_MODE_MODIFY;
Emmanuel Grumbach93a42662013-07-02 13:35:35 +03001300 if (start) {
1301 cmd.add_immediate_ba_tid = (u8) tid;
1302 cmd.add_immediate_ba_ssn = cpu_to_le16(ssn);
Sara Sharon854c5702016-01-26 13:17:47 +02001303 cmd.rx_ba_window = cpu_to_le16((u16)buf_size);
Emmanuel Grumbach93a42662013-07-02 13:35:35 +03001304 } else {
1305 cmd.remove_immediate_ba_tid = (u8) tid;
1306 }
Johannes Berg8ca151b2013-01-24 14:25:36 +01001307 cmd.modify_mask = start ? STA_MODIFY_ADD_BA_TID :
1308 STA_MODIFY_REMOVE_BA_TID;
1309
1310 status = ADD_STA_SUCCESS;
Sara Sharon854c5702016-01-26 13:17:47 +02001311 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
1312 iwl_mvm_add_sta_cmd_size(mvm),
Emmanuel Grumbachf9dc0002014-03-30 09:53:27 +03001313 &cmd, &status);
Johannes Berg8ca151b2013-01-24 14:25:36 +01001314 if (ret)
Sara Sharon10b2b202016-03-20 16:23:41 +02001315 goto out_free;
Johannes Berg8ca151b2013-01-24 14:25:36 +01001316
Sara Sharon837c4da2016-01-07 16:50:45 +02001317 switch (status & IWL_ADD_STA_STATUS_MASK) {
Johannes Berg8ca151b2013-01-24 14:25:36 +01001318 case ADD_STA_SUCCESS:
1319 IWL_DEBUG_INFO(mvm, "RX BA Session %sed in fw\n",
1320 start ? "start" : "stopp");
1321 break;
1322 case ADD_STA_IMMEDIATE_BA_FAILURE:
1323 IWL_WARN(mvm, "RX BA Session refused by fw\n");
1324 ret = -ENOSPC;
1325 break;
1326 default:
1327 ret = -EIO;
1328 IWL_ERR(mvm, "RX BA Session failed %sing, status 0x%x\n",
1329 start ? "start" : "stopp", status);
1330 break;
1331 }
1332
Sara Sharon10b2b202016-03-20 16:23:41 +02001333 if (ret)
1334 goto out_free;
Emmanuel Grumbach113a0442013-07-02 14:16:38 +03001335
Sara Sharon10b2b202016-03-20 16:23:41 +02001336 if (start) {
1337 u8 baid;
1338
1339 mvm->rx_ba_sessions++;
1340
1341 if (!iwl_mvm_has_new_rx_api(mvm))
1342 return 0;
1343
1344 if (WARN_ON(!(status & IWL_ADD_STA_BAID_VALID_MASK))) {
1345 ret = -EINVAL;
1346 goto out_free;
1347 }
1348 baid = (u8)((status & IWL_ADD_STA_BAID_MASK) >>
1349 IWL_ADD_STA_BAID_SHIFT);
1350 baid_data->baid = baid;
1351 baid_data->timeout = timeout;
1352 baid_data->last_rx = jiffies;
1353 init_timer(&baid_data->session_timer);
1354 baid_data->session_timer.function =
1355 iwl_mvm_rx_agg_session_expired;
1356 baid_data->session_timer.data =
1357 (unsigned long)&mvm->baid_map[baid];
1358 baid_data->mvm = mvm;
1359 baid_data->tid = tid;
1360 baid_data->sta_id = mvm_sta->sta_id;
1361
1362 mvm_sta->tid_to_baid[tid] = baid;
1363 if (timeout)
1364 mod_timer(&baid_data->session_timer,
1365 TU_TO_EXP_TIME(timeout * 2));
1366
Sara Sharonb915c102016-03-23 16:32:02 +02001367 iwl_mvm_init_reorder_buffer(mvm, mvm_sta->sta_id,
1368 baid_data, ssn, buf_size);
Sara Sharon10b2b202016-03-20 16:23:41 +02001369 /*
1370 * protect the BA data with RCU to cover a case where our
1371 * internal RX sync mechanism will timeout (not that it's
1372 * supposed to happen) and we will free the session data while
1373 * RX is being processed in parallel
1374 */
1375 WARN_ON(rcu_access_pointer(mvm->baid_map[baid]));
1376 rcu_assign_pointer(mvm->baid_map[baid], baid_data);
1377 } else if (mvm->rx_ba_sessions > 0) {
1378 u8 baid = mvm_sta->tid_to_baid[tid];
1379
1380 /* check that restart flow didn't zero the counter */
1381 mvm->rx_ba_sessions--;
1382 if (!iwl_mvm_has_new_rx_api(mvm))
1383 return 0;
1384
1385 if (WARN_ON(baid == IWL_RX_REORDER_DATA_INVALID_BAID))
1386 return -EINVAL;
1387
1388 baid_data = rcu_access_pointer(mvm->baid_map[baid]);
1389 if (WARN_ON(!baid_data))
1390 return -EINVAL;
1391
1392 /* synchronize all rx queues so we can safely delete */
Sara Sharonb915c102016-03-23 16:32:02 +02001393 iwl_mvm_free_reorder(mvm, baid_data);
Sara Sharon10b2b202016-03-20 16:23:41 +02001394 del_timer_sync(&baid_data->session_timer);
Sara Sharon10b2b202016-03-20 16:23:41 +02001395 RCU_INIT_POINTER(mvm->baid_map[baid], NULL);
1396 kfree_rcu(baid_data, rcu_head);
1397 }
1398 return 0;
1399
1400out_free:
1401 kfree(baid_data);
Johannes Berg8ca151b2013-01-24 14:25:36 +01001402 return ret;
1403}
1404
1405static int iwl_mvm_sta_tx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
1406 int tid, u8 queue, bool start)
1407{
Johannes Berg9d8ce6a2014-12-23 16:02:40 +01001408 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
Emmanuel Grumbachf9dc0002014-03-30 09:53:27 +03001409 struct iwl_mvm_add_sta_cmd cmd = {};
Johannes Berg8ca151b2013-01-24 14:25:36 +01001410 int ret;
1411 u32 status;
1412
1413 lockdep_assert_held(&mvm->mutex);
1414
1415 if (start) {
1416 mvm_sta->tfd_queue_msk |= BIT(queue);
1417 mvm_sta->tid_disable_agg &= ~BIT(tid);
1418 } else {
Liad Kaufmancf961e12015-08-13 19:16:08 +03001419 /* In DQA-mode the queue isn't removed on agg termination */
1420 if (!iwl_mvm_is_dqa_supported(mvm))
1421 mvm_sta->tfd_queue_msk &= ~BIT(queue);
Johannes Berg8ca151b2013-01-24 14:25:36 +01001422 mvm_sta->tid_disable_agg |= BIT(tid);
1423 }
1424
1425 cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color);
1426 cmd.sta_id = mvm_sta->sta_id;
1427 cmd.add_modify = STA_MODE_MODIFY;
1428 cmd.modify_mask = STA_MODIFY_QUEUES | STA_MODIFY_TID_DISABLE_TX;
1429 cmd.tfd_queue_msk = cpu_to_le32(mvm_sta->tfd_queue_msk);
1430 cmd.tid_disable_tx = cpu_to_le16(mvm_sta->tid_disable_agg);
1431
1432 status = ADD_STA_SUCCESS;
Sara Sharon854c5702016-01-26 13:17:47 +02001433 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
1434 iwl_mvm_add_sta_cmd_size(mvm),
Emmanuel Grumbachf9dc0002014-03-30 09:53:27 +03001435 &cmd, &status);
Johannes Berg8ca151b2013-01-24 14:25:36 +01001436 if (ret)
1437 return ret;
1438
Sara Sharon837c4da2016-01-07 16:50:45 +02001439 switch (status & IWL_ADD_STA_STATUS_MASK) {
Johannes Berg8ca151b2013-01-24 14:25:36 +01001440 case ADD_STA_SUCCESS:
1441 break;
1442 default:
1443 ret = -EIO;
1444 IWL_ERR(mvm, "TX BA Session failed %sing, status 0x%x\n",
1445 start ? "start" : "stopp", status);
1446 break;
1447 }
1448
1449 return ret;
1450}
1451
Emmanuel Grumbachb797e3f2014-03-06 14:49:36 +02001452const u8 tid_to_mac80211_ac[] = {
Johannes Berg8ca151b2013-01-24 14:25:36 +01001453 IEEE80211_AC_BE,
1454 IEEE80211_AC_BK,
1455 IEEE80211_AC_BK,
1456 IEEE80211_AC_BE,
1457 IEEE80211_AC_VI,
1458 IEEE80211_AC_VI,
1459 IEEE80211_AC_VO,
1460 IEEE80211_AC_VO,
1461};
1462
Johannes Berg3e56ead2013-02-15 22:23:18 +01001463static const u8 tid_to_ucode_ac[] = {
1464 AC_BE,
1465 AC_BK,
1466 AC_BK,
1467 AC_BE,
1468 AC_VI,
1469 AC_VI,
1470 AC_VO,
1471 AC_VO,
1472};
1473
Johannes Berg8ca151b2013-01-24 14:25:36 +01001474int iwl_mvm_sta_tx_agg_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1475 struct ieee80211_sta *sta, u16 tid, u16 *ssn)
1476{
Johannes Berg5b577a92013-11-14 18:20:04 +01001477 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
Johannes Berg8ca151b2013-01-24 14:25:36 +01001478 struct iwl_mvm_tid_data *tid_data;
1479 int txq_id;
Liad Kaufman4ecafae2015-07-14 13:36:18 +03001480 int ret;
Johannes Berg8ca151b2013-01-24 14:25:36 +01001481
1482 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
1483 return -EINVAL;
1484
1485 if (mvmsta->tid_data[tid].state != IWL_AGG_OFF) {
1486 IWL_ERR(mvm, "Start AGG when state is not IWL_AGG_OFF %d!\n",
1487 mvmsta->tid_data[tid].state);
1488 return -ENXIO;
1489 }
1490
1491 lockdep_assert_held(&mvm->mutex);
1492
Arik Nemtsovb2492502014-03-13 12:21:50 +02001493 spin_lock_bh(&mvmsta->lock);
1494
1495 /* possible race condition - we entered D0i3 while starting agg */
1496 if (test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status)) {
1497 spin_unlock_bh(&mvmsta->lock);
1498 IWL_ERR(mvm, "Entered D0i3 while starting Tx agg\n");
1499 return -EIO;
1500 }
1501
Liad Kaufman4ecafae2015-07-14 13:36:18 +03001502 spin_lock_bh(&mvm->queue_info_lock);
1503
Liad Kaufmancf961e12015-08-13 19:16:08 +03001504 /*
1505 * Note the possible cases:
1506 * 1. In DQA mode with an enabled TXQ - TXQ needs to become agg'ed
1507 * 2. Non-DQA mode: the TXQ hasn't yet been enabled, so find a free
1508 * one and mark it as reserved
1509 * 3. In DQA mode, but no traffic yet on this TID: same treatment as in
1510 * non-DQA mode, since the TXQ hasn't yet been allocated
1511 */
1512 txq_id = mvmsta->tid_data[tid].txq_id;
1513 if (!iwl_mvm_is_dqa_supported(mvm) ||
1514 mvm->queue_info[txq_id].status != IWL_MVM_QUEUE_READY) {
1515 txq_id = iwl_mvm_find_free_queue(mvm, mvm->first_agg_queue,
1516 mvm->last_agg_queue);
1517 if (txq_id < 0) {
1518 ret = txq_id;
1519 spin_unlock_bh(&mvm->queue_info_lock);
1520 IWL_ERR(mvm, "Failed to allocate agg queue\n");
1521 goto release_locks;
1522 }
1523
1524 /* TXQ hasn't yet been enabled, so mark it only as reserved */
1525 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_RESERVED;
Liad Kaufman4ecafae2015-07-14 13:36:18 +03001526 }
Liad Kaufman4ecafae2015-07-14 13:36:18 +03001527 spin_unlock_bh(&mvm->queue_info_lock);
Johannes Berg8ca151b2013-01-24 14:25:36 +01001528
Liad Kaufmancf961e12015-08-13 19:16:08 +03001529 IWL_DEBUG_TX_QUEUES(mvm,
1530 "AGG for tid %d will be on queue #%d\n",
1531 tid, txq_id);
1532
Johannes Berg8ca151b2013-01-24 14:25:36 +01001533 tid_data = &mvmsta->tid_data[tid];
Johannes Berg9a886582013-02-15 19:25:00 +01001534 tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
Johannes Berg8ca151b2013-01-24 14:25:36 +01001535 tid_data->txq_id = txq_id;
1536 *ssn = tid_data->ssn;
1537
1538 IWL_DEBUG_TX_QUEUES(mvm,
1539 "Start AGG: sta %d tid %d queue %d - ssn = %d, next_recl = %d\n",
1540 mvmsta->sta_id, tid, txq_id, tid_data->ssn,
1541 tid_data->next_reclaimed);
1542
1543 if (tid_data->ssn == tid_data->next_reclaimed) {
1544 tid_data->state = IWL_AGG_STARTING;
1545 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1546 } else {
1547 tid_data->state = IWL_EMPTYING_HW_QUEUE_ADDBA;
1548 }
1549
Liad Kaufman4ecafae2015-07-14 13:36:18 +03001550 ret = 0;
1551
1552release_locks:
Johannes Berg8ca151b2013-01-24 14:25:36 +01001553 spin_unlock_bh(&mvmsta->lock);
1554
Liad Kaufman4ecafae2015-07-14 13:36:18 +03001555 return ret;
Johannes Berg8ca151b2013-01-24 14:25:36 +01001556}
1557
1558int iwl_mvm_sta_tx_agg_oper(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
Emmanuel Grumbachbb81bb62015-10-26 16:00:29 +02001559 struct ieee80211_sta *sta, u16 tid, u8 buf_size,
1560 bool amsdu)
Johannes Berg8ca151b2013-01-24 14:25:36 +01001561{
Johannes Berg5b577a92013-11-14 18:20:04 +01001562 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
Johannes Berg8ca151b2013-01-24 14:25:36 +01001563 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
Emmanuel Grumbach5d42e7b2015-03-19 20:04:51 +02001564 unsigned int wdg_timeout =
1565 iwl_mvm_get_wd_timeout(mvm, vif, sta->tdls, false);
Emmanuel Grumbacheea76c32016-02-21 16:29:17 +02001566 int queue, ret;
Liad Kaufmancf961e12015-08-13 19:16:08 +03001567 bool alloc_queue = true;
Johannes Berg8ca151b2013-01-24 14:25:36 +01001568 u16 ssn;
1569
Emmanuel Grumbacheea76c32016-02-21 16:29:17 +02001570 struct iwl_trans_txq_scd_cfg cfg = {
1571 .sta_id = mvmsta->sta_id,
1572 .tid = tid,
1573 .frame_limit = buf_size,
1574 .aggregate = true,
1575 };
1576
Eyal Shapiraefed6642014-09-14 15:58:53 +03001577 BUILD_BUG_ON((sizeof(mvmsta->agg_tids) * BITS_PER_BYTE)
1578 != IWL_MAX_TID_COUNT);
1579
Johannes Berg8ca151b2013-01-24 14:25:36 +01001580 buf_size = min_t(int, buf_size, LINK_QUAL_AGG_FRAME_LIMIT_DEF);
1581
1582 spin_lock_bh(&mvmsta->lock);
1583 ssn = tid_data->ssn;
1584 queue = tid_data->txq_id;
1585 tid_data->state = IWL_AGG_ON;
Eyal Shapiraefed6642014-09-14 15:58:53 +03001586 mvmsta->agg_tids |= BIT(tid);
Johannes Berg8ca151b2013-01-24 14:25:36 +01001587 tid_data->ssn = 0xffff;
Emmanuel Grumbachbb81bb62015-10-26 16:00:29 +02001588 tid_data->amsdu_in_ampdu_allowed = amsdu;
Johannes Berg8ca151b2013-01-24 14:25:36 +01001589 spin_unlock_bh(&mvmsta->lock);
1590
Emmanuel Grumbacheea76c32016-02-21 16:29:17 +02001591 cfg.fifo = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]];
Johannes Berg8ca151b2013-01-24 14:25:36 +01001592
Liad Kaufmancf961e12015-08-13 19:16:08 +03001593 /* In DQA mode, the existing queue might need to be reconfigured */
1594 if (iwl_mvm_is_dqa_supported(mvm)) {
1595 spin_lock_bh(&mvm->queue_info_lock);
1596 /* Maybe there is no need to even alloc a queue... */
1597 if (mvm->queue_info[queue].status == IWL_MVM_QUEUE_READY)
1598 alloc_queue = false;
1599 spin_unlock_bh(&mvm->queue_info_lock);
1600
1601 /*
1602 * Only reconfig the SCD for the queue if the window size has
1603 * changed from current (become smaller)
1604 */
1605 if (!alloc_queue && buf_size < mvmsta->max_agg_bufsize) {
1606 /*
1607 * If reconfiguring an existing queue, it first must be
1608 * drained
1609 */
1610 ret = iwl_trans_wait_tx_queue_empty(mvm->trans,
1611 BIT(queue));
1612 if (ret) {
1613 IWL_ERR(mvm,
1614 "Error draining queue before reconfig\n");
1615 return ret;
1616 }
1617
1618 ret = iwl_mvm_reconfig_scd(mvm, queue, cfg.fifo,
1619 mvmsta->sta_id, tid,
1620 buf_size, ssn);
1621 if (ret) {
1622 IWL_ERR(mvm,
1623 "Error reconfiguring TXQ #%d\n", queue);
1624 return ret;
1625 }
1626 }
1627 }
1628
1629 if (alloc_queue)
1630 iwl_mvm_enable_txq(mvm, queue,
1631 vif->hw_queue[tid_to_mac80211_ac[tid]], ssn,
1632 &cfg, wdg_timeout);
Andrei Otcheretianskifa7878e2015-05-05 09:28:16 +03001633
Johannes Berg8ca151b2013-01-24 14:25:36 +01001634 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true);
1635 if (ret)
1636 return -EIO;
1637
Liad Kaufman4ecafae2015-07-14 13:36:18 +03001638 /* No need to mark as reserved */
1639 spin_lock_bh(&mvm->queue_info_lock);
Liad Kaufmancf961e12015-08-13 19:16:08 +03001640 mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY;
Liad Kaufman4ecafae2015-07-14 13:36:18 +03001641 spin_unlock_bh(&mvm->queue_info_lock);
1642
Johannes Berg8ca151b2013-01-24 14:25:36 +01001643 /*
1644 * Even though in theory the peer could have different
1645 * aggregation reorder buffer sizes for different sessions,
1646 * our ucode doesn't allow for that and has a global limit
1647 * for each station. Therefore, use the minimum of all the
1648 * aggregation sessions and our default value.
1649 */
1650 mvmsta->max_agg_bufsize =
1651 min(mvmsta->max_agg_bufsize, buf_size);
1652 mvmsta->lq_sta.lq.agg_frame_cnt_limit = mvmsta->max_agg_bufsize;
1653
Eytan Lifshitz9ee718a2013-05-19 19:14:41 +03001654 IWL_DEBUG_HT(mvm, "Tx aggregation enabled on ra = %pM tid = %d\n",
1655 sta->addr, tid);
1656
Eyal Shapira9e680942013-11-09 00:16:16 +02001657 return iwl_mvm_send_lq_cmd(mvm, &mvmsta->lq_sta.lq, false);
Johannes Berg8ca151b2013-01-24 14:25:36 +01001658}
1659
1660int iwl_mvm_sta_tx_agg_stop(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1661 struct ieee80211_sta *sta, u16 tid)
1662{
Johannes Berg5b577a92013-11-14 18:20:04 +01001663 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
Johannes Berg8ca151b2013-01-24 14:25:36 +01001664 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
1665 u16 txq_id;
1666 int err;
1667
Emmanuel Grumbachf9aa8dd2013-03-04 09:11:08 +02001668
1669 /*
1670 * If mac80211 is cleaning its state, then say that we finished since
1671 * our state has been cleared anyway.
1672 */
1673 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
1674 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1675 return 0;
1676 }
1677
Johannes Berg8ca151b2013-01-24 14:25:36 +01001678 spin_lock_bh(&mvmsta->lock);
1679
1680 txq_id = tid_data->txq_id;
1681
1682 IWL_DEBUG_TX_QUEUES(mvm, "Stop AGG: sta %d tid %d q %d state %d\n",
1683 mvmsta->sta_id, tid, txq_id, tid_data->state);
1684
Eyal Shapiraefed6642014-09-14 15:58:53 +03001685 mvmsta->agg_tids &= ~BIT(tid);
1686
Liad Kaufman4ecafae2015-07-14 13:36:18 +03001687 spin_lock_bh(&mvm->queue_info_lock);
Liad Kaufmancf961e12015-08-13 19:16:08 +03001688 /*
1689 * The TXQ is marked as reserved only if no traffic came through yet
1690 * This means no traffic has been sent on this TID (agg'd or not), so
1691 * we no longer have use for the queue. Since it hasn't even been
1692 * allocated through iwl_mvm_enable_txq, so we can just mark it back as
1693 * free.
1694 */
1695 if (mvm->queue_info[txq_id].status == IWL_MVM_QUEUE_RESERVED)
1696 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_FREE;
Liad Kaufman4ecafae2015-07-14 13:36:18 +03001697 spin_unlock_bh(&mvm->queue_info_lock);
1698
Johannes Berg8ca151b2013-01-24 14:25:36 +01001699 switch (tid_data->state) {
1700 case IWL_AGG_ON:
Johannes Berg9a886582013-02-15 19:25:00 +01001701 tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
Johannes Berg8ca151b2013-01-24 14:25:36 +01001702
1703 IWL_DEBUG_TX_QUEUES(mvm,
1704 "ssn = %d, next_recl = %d\n",
1705 tid_data->ssn, tid_data->next_reclaimed);
1706
1707 /* There are still packets for this RA / TID in the HW */
1708 if (tid_data->ssn != tid_data->next_reclaimed) {
1709 tid_data->state = IWL_EMPTYING_HW_QUEUE_DELBA;
1710 err = 0;
1711 break;
1712 }
1713
1714 tid_data->ssn = 0xffff;
Johannes Bergf7f89e72014-08-05 15:24:44 +02001715 tid_data->state = IWL_AGG_OFF;
Johannes Bergf7f89e72014-08-05 15:24:44 +02001716 spin_unlock_bh(&mvmsta->lock);
1717
1718 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1719
1720 iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false);
1721
Liad Kaufmancf961e12015-08-13 19:16:08 +03001722 if (!iwl_mvm_is_dqa_supported(mvm)) {
1723 int mac_queue = vif->hw_queue[tid_to_mac80211_ac[tid]];
1724
1725 iwl_mvm_disable_txq(mvm, txq_id, mac_queue, tid, 0);
1726 }
Johannes Bergf7f89e72014-08-05 15:24:44 +02001727 return 0;
Johannes Berg8ca151b2013-01-24 14:25:36 +01001728 case IWL_AGG_STARTING:
1729 case IWL_EMPTYING_HW_QUEUE_ADDBA:
1730 /*
1731 * The agg session has been stopped before it was set up. This
1732 * can happen when the AddBA timer times out for example.
1733 */
1734
1735 /* No barriers since we are under mutex */
1736 lockdep_assert_held(&mvm->mutex);
Johannes Berg8ca151b2013-01-24 14:25:36 +01001737
1738 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1739 tid_data->state = IWL_AGG_OFF;
1740 err = 0;
1741 break;
1742 default:
1743 IWL_ERR(mvm,
1744 "Stopping AGG while state not ON or starting for %d on %d (%d)\n",
1745 mvmsta->sta_id, tid, tid_data->state);
1746 IWL_ERR(mvm,
1747 "\ttid_data->txq_id = %d\n", tid_data->txq_id);
1748 err = -EINVAL;
1749 }
1750
1751 spin_unlock_bh(&mvmsta->lock);
1752
1753 return err;
1754}
1755
Emmanuel Grumbache3d9e7c2013-02-19 16:13:53 +02001756int iwl_mvm_sta_tx_agg_flush(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1757 struct ieee80211_sta *sta, u16 tid)
1758{
Johannes Berg5b577a92013-11-14 18:20:04 +01001759 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
Emmanuel Grumbache3d9e7c2013-02-19 16:13:53 +02001760 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
1761 u16 txq_id;
Johannes Bergb6658ff2013-07-24 13:55:51 +02001762 enum iwl_mvm_agg_state old_state;
Emmanuel Grumbache3d9e7c2013-02-19 16:13:53 +02001763
1764 /*
1765 * First set the agg state to OFF to avoid calling
1766 * ieee80211_stop_tx_ba_cb in iwl_mvm_check_ratid_empty.
1767 */
1768 spin_lock_bh(&mvmsta->lock);
1769 txq_id = tid_data->txq_id;
1770 IWL_DEBUG_TX_QUEUES(mvm, "Flush AGG: sta %d tid %d q %d state %d\n",
1771 mvmsta->sta_id, tid, txq_id, tid_data->state);
Johannes Bergb6658ff2013-07-24 13:55:51 +02001772 old_state = tid_data->state;
Emmanuel Grumbache3d9e7c2013-02-19 16:13:53 +02001773 tid_data->state = IWL_AGG_OFF;
Eyal Shapiraefed6642014-09-14 15:58:53 +03001774 mvmsta->agg_tids &= ~BIT(tid);
Emmanuel Grumbache3d9e7c2013-02-19 16:13:53 +02001775 spin_unlock_bh(&mvmsta->lock);
1776
Liad Kaufman4ecafae2015-07-14 13:36:18 +03001777 spin_lock_bh(&mvm->queue_info_lock);
Liad Kaufmancf961e12015-08-13 19:16:08 +03001778 /*
1779 * The TXQ is marked as reserved only if no traffic came through yet
1780 * This means no traffic has been sent on this TID (agg'd or not), so
1781 * we no longer have use for the queue. Since it hasn't even been
1782 * allocated through iwl_mvm_enable_txq, so we can just mark it back as
1783 * free.
1784 */
1785 if (mvm->queue_info[txq_id].status == IWL_MVM_QUEUE_RESERVED)
1786 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_FREE;
Liad Kaufman4ecafae2015-07-14 13:36:18 +03001787 spin_unlock_bh(&mvm->queue_info_lock);
1788
Johannes Bergb6658ff2013-07-24 13:55:51 +02001789 if (old_state >= IWL_AGG_ON) {
Emmanuel Grumbachfe92e322015-03-11 09:34:31 +02001790 iwl_mvm_drain_sta(mvm, mvmsta, true);
Luca Coelho5888a402015-10-06 09:54:57 +03001791 if (iwl_mvm_flush_tx_path(mvm, BIT(txq_id), 0))
Johannes Bergb6658ff2013-07-24 13:55:51 +02001792 IWL_ERR(mvm, "Couldn't flush the AGG queue\n");
Emmanuel Grumbachfe92e322015-03-11 09:34:31 +02001793 iwl_trans_wait_tx_queue_empty(mvm->trans,
1794 mvmsta->tfd_queue_msk);
1795 iwl_mvm_drain_sta(mvm, mvmsta, false);
Emmanuel Grumbache3d9e7c2013-02-19 16:13:53 +02001796
Johannes Bergf7f89e72014-08-05 15:24:44 +02001797 iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false);
1798
Liad Kaufmancf961e12015-08-13 19:16:08 +03001799 if (!iwl_mvm_is_dqa_supported(mvm)) {
1800 int mac_queue = vif->hw_queue[tid_to_mac80211_ac[tid]];
1801
1802 iwl_mvm_disable_txq(mvm, tid_data->txq_id, mac_queue,
1803 tid, 0);
1804 }
Johannes Bergb6658ff2013-07-24 13:55:51 +02001805 }
1806
Emmanuel Grumbache3d9e7c2013-02-19 16:13:53 +02001807 return 0;
1808}
1809
Johannes Berg8ca151b2013-01-24 14:25:36 +01001810static int iwl_mvm_set_fw_key_idx(struct iwl_mvm *mvm)
1811{
Johannes Berg2dc2a152015-06-16 17:09:18 +02001812 int i, max = -1, max_offs = -1;
Johannes Berg8ca151b2013-01-24 14:25:36 +01001813
1814 lockdep_assert_held(&mvm->mutex);
1815
Johannes Berg2dc2a152015-06-16 17:09:18 +02001816 /* Pick the unused key offset with the highest 'deleted'
1817 * counter. Every time a key is deleted, all the counters
1818 * are incremented and the one that was just deleted is
1819 * reset to zero. Thus, the highest counter is the one
1820 * that was deleted longest ago. Pick that one.
1821 */
1822 for (i = 0; i < STA_KEY_MAX_NUM; i++) {
1823 if (test_bit(i, mvm->fw_key_table))
1824 continue;
1825 if (mvm->fw_key_deleted[i] > max) {
1826 max = mvm->fw_key_deleted[i];
1827 max_offs = i;
1828 }
1829 }
Johannes Berg8ca151b2013-01-24 14:25:36 +01001830
Johannes Berg2dc2a152015-06-16 17:09:18 +02001831 if (max_offs < 0)
Johannes Berg8ca151b2013-01-24 14:25:36 +01001832 return STA_KEY_IDX_INVALID;
1833
Johannes Berg2dc2a152015-06-16 17:09:18 +02001834 return max_offs;
Johannes Berg8ca151b2013-01-24 14:25:36 +01001835}
1836
Johannes Berg5f7a1842015-12-11 09:36:10 +01001837static struct iwl_mvm_sta *iwl_mvm_get_key_sta(struct iwl_mvm *mvm,
1838 struct ieee80211_vif *vif,
1839 struct ieee80211_sta *sta)
Johannes Berg8ca151b2013-01-24 14:25:36 +01001840{
Johannes Berg5b530e92014-12-23 16:00:17 +01001841 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
Johannes Berg8ca151b2013-01-24 14:25:36 +01001842
Johannes Berg5f7a1842015-12-11 09:36:10 +01001843 if (sta)
1844 return iwl_mvm_sta_from_mac80211(sta);
Johannes Berg8ca151b2013-01-24 14:25:36 +01001845
1846 /*
1847 * The device expects GTKs for station interfaces to be
1848 * installed as GTKs for the AP station. If we have no
1849 * station ID, then use AP's station ID.
1850 */
1851 if (vif->type == NL80211_IFTYPE_STATION &&
Avri Altman9513c5e2015-10-19 16:29:11 +02001852 mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT) {
1853 u8 sta_id = mvmvif->ap_sta_id;
1854
Emmanuel Grumbach7d6a1ab2016-05-15 10:20:29 +03001855 sta = rcu_dereference_check(mvm->fw_id_to_mac_id[sta_id],
1856 lockdep_is_held(&mvm->mutex));
1857
Avri Altman9513c5e2015-10-19 16:29:11 +02001858 /*
1859 * It is possible that the 'sta' parameter is NULL,
1860 * for example when a GTK is removed - the sta_id will then
1861 * be the AP ID, and no station was passed by mac80211.
1862 */
Emmanuel Grumbach7d6a1ab2016-05-15 10:20:29 +03001863 if (IS_ERR_OR_NULL(sta))
1864 return NULL;
1865
1866 return iwl_mvm_sta_from_mac80211(sta);
Avri Altman9513c5e2015-10-19 16:29:11 +02001867 }
Johannes Berg8ca151b2013-01-24 14:25:36 +01001868
Johannes Berg5f7a1842015-12-11 09:36:10 +01001869 return NULL;
Johannes Berg8ca151b2013-01-24 14:25:36 +01001870}
1871
1872static int iwl_mvm_send_sta_key(struct iwl_mvm *mvm,
1873 struct iwl_mvm_sta *mvm_sta,
Johannes Bergba3943b2014-11-12 23:54:48 +01001874 struct ieee80211_key_conf *keyconf, bool mcast,
Luca Coelhod6ee54a2015-11-10 22:13:43 +02001875 u32 tkip_iv32, u16 *tkip_p1k, u32 cmd_flags,
1876 u8 key_offset)
Johannes Berg8ca151b2013-01-24 14:25:36 +01001877{
Max Stepanov5a258aa2013-04-07 09:11:21 +03001878 struct iwl_mvm_add_sta_key_cmd cmd = {};
Emmanuel Grumbachf9dc0002014-03-30 09:53:27 +03001879 __le16 key_flags;
Johannes Berg79920742014-11-03 15:43:04 +01001880 int ret;
1881 u32 status;
Johannes Berg8ca151b2013-01-24 14:25:36 +01001882 u16 keyidx;
1883 int i;
Johannes Berg2f6319d2014-11-12 23:39:56 +01001884 u8 sta_id = mvm_sta->sta_id;
Johannes Berg8ca151b2013-01-24 14:25:36 +01001885
1886 keyidx = (keyconf->keyidx << STA_KEY_FLG_KEYID_POS) &
1887 STA_KEY_FLG_KEYID_MSK;
1888 key_flags = cpu_to_le16(keyidx);
1889 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_KEY_MAP);
1890
1891 switch (keyconf->cipher) {
1892 case WLAN_CIPHER_SUITE_TKIP:
1893 key_flags |= cpu_to_le16(STA_KEY_FLG_TKIP);
Max Stepanov5a258aa2013-04-07 09:11:21 +03001894 cmd.tkip_rx_tsc_byte2 = tkip_iv32;
Johannes Berg8ca151b2013-01-24 14:25:36 +01001895 for (i = 0; i < 5; i++)
Max Stepanov5a258aa2013-04-07 09:11:21 +03001896 cmd.tkip_rx_ttak[i] = cpu_to_le16(tkip_p1k[i]);
1897 memcpy(cmd.key, keyconf->key, keyconf->keylen);
Johannes Berg8ca151b2013-01-24 14:25:36 +01001898 break;
1899 case WLAN_CIPHER_SUITE_CCMP:
1900 key_flags |= cpu_to_le16(STA_KEY_FLG_CCM);
Max Stepanov5a258aa2013-04-07 09:11:21 +03001901 memcpy(cmd.key, keyconf->key, keyconf->keylen);
Johannes Berg8ca151b2013-01-24 14:25:36 +01001902 break;
Johannes Bergba3943b2014-11-12 23:54:48 +01001903 case WLAN_CIPHER_SUITE_WEP104:
1904 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_13BYTES);
John W. Linvilleaa0cb082015-01-12 16:18:11 -05001905 /* fall through */
Johannes Bergba3943b2014-11-12 23:54:48 +01001906 case WLAN_CIPHER_SUITE_WEP40:
1907 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP);
1908 memcpy(cmd.key + 3, keyconf->key, keyconf->keylen);
1909 break;
Johannes Berg8ca151b2013-01-24 14:25:36 +01001910 default:
Max Stepanove36e5432013-08-27 19:56:13 +03001911 key_flags |= cpu_to_le16(STA_KEY_FLG_EXT);
1912 memcpy(cmd.key, keyconf->key, keyconf->keylen);
Johannes Berg8ca151b2013-01-24 14:25:36 +01001913 }
1914
Johannes Bergba3943b2014-11-12 23:54:48 +01001915 if (mcast)
Johannes Berg8ca151b2013-01-24 14:25:36 +01001916 key_flags |= cpu_to_le16(STA_KEY_MULTICAST);
1917
Luca Coelhod6ee54a2015-11-10 22:13:43 +02001918 cmd.key_offset = key_offset;
Max Stepanov5a258aa2013-04-07 09:11:21 +03001919 cmd.key_flags = key_flags;
Johannes Berg8ca151b2013-01-24 14:25:36 +01001920 cmd.sta_id = sta_id;
1921
1922 status = ADD_STA_SUCCESS;
Emmanuel Grumbacha1022922014-05-12 11:36:41 +03001923 if (cmd_flags & CMD_ASYNC)
Emmanuel Grumbachf9dc0002014-03-30 09:53:27 +03001924 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA_KEY, CMD_ASYNC,
1925 sizeof(cmd), &cmd);
Emmanuel Grumbacha1022922014-05-12 11:36:41 +03001926 else
1927 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, sizeof(cmd),
1928 &cmd, &status);
Johannes Berg8ca151b2013-01-24 14:25:36 +01001929
1930 switch (status) {
1931 case ADD_STA_SUCCESS:
1932 IWL_DEBUG_WEP(mvm, "MODIFY_STA: set dynamic key passed\n");
1933 break;
1934 default:
1935 ret = -EIO;
1936 IWL_ERR(mvm, "MODIFY_STA: set dynamic key failed\n");
1937 break;
1938 }
1939
1940 return ret;
1941}
1942
1943static int iwl_mvm_send_sta_igtk(struct iwl_mvm *mvm,
1944 struct ieee80211_key_conf *keyconf,
1945 u8 sta_id, bool remove_key)
1946{
1947 struct iwl_mvm_mgmt_mcast_key_cmd igtk_cmd = {};
1948
1949 /* verify the key details match the required command's expectations */
1950 if (WARN_ON((keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC) ||
1951 (keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE) ||
1952 (keyconf->keyidx != 4 && keyconf->keyidx != 5)))
1953 return -EINVAL;
1954
1955 igtk_cmd.key_id = cpu_to_le32(keyconf->keyidx);
1956 igtk_cmd.sta_id = cpu_to_le32(sta_id);
1957
1958 if (remove_key) {
1959 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_NOT_VALID);
1960 } else {
1961 struct ieee80211_key_seq seq;
1962 const u8 *pn;
1963
Ayala Bekeraa950522016-06-01 00:28:09 +03001964 switch (keyconf->cipher) {
1965 case WLAN_CIPHER_SUITE_AES_CMAC:
1966 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_FLG_CCM);
1967 break;
1968 default:
1969 return -EINVAL;
1970 }
1971
Johannes Berg8ca151b2013-01-24 14:25:36 +01001972 memcpy(igtk_cmd.IGTK, keyconf->key, keyconf->keylen);
Johannes Berg8ca151b2013-01-24 14:25:36 +01001973 ieee80211_get_key_rx_seq(keyconf, 0, &seq);
1974 pn = seq.aes_cmac.pn;
1975 igtk_cmd.receive_seq_cnt = cpu_to_le64(((u64) pn[5] << 0) |
1976 ((u64) pn[4] << 8) |
1977 ((u64) pn[3] << 16) |
1978 ((u64) pn[2] << 24) |
1979 ((u64) pn[1] << 32) |
1980 ((u64) pn[0] << 40));
1981 }
1982
1983 IWL_DEBUG_INFO(mvm, "%s igtk for sta %u\n",
1984 remove_key ? "removing" : "installing",
1985 igtk_cmd.sta_id);
1986
Emmanuel Grumbacha1022922014-05-12 11:36:41 +03001987 return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, 0,
Johannes Berg8ca151b2013-01-24 14:25:36 +01001988 sizeof(igtk_cmd), &igtk_cmd);
1989}
1990
1991
1992static inline u8 *iwl_mvm_get_mac_addr(struct iwl_mvm *mvm,
1993 struct ieee80211_vif *vif,
1994 struct ieee80211_sta *sta)
1995{
Johannes Berg5b530e92014-12-23 16:00:17 +01001996 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
Johannes Berg8ca151b2013-01-24 14:25:36 +01001997
1998 if (sta)
1999 return sta->addr;
2000
2001 if (vif->type == NL80211_IFTYPE_STATION &&
2002 mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT) {
2003 u8 sta_id = mvmvif->ap_sta_id;
2004 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
2005 lockdep_is_held(&mvm->mutex));
2006 return sta->addr;
2007 }
2008
2009
2010 return NULL;
2011}
2012
Johannes Berg2f6319d2014-11-12 23:39:56 +01002013static int __iwl_mvm_set_sta_key(struct iwl_mvm *mvm,
2014 struct ieee80211_vif *vif,
2015 struct ieee80211_sta *sta,
Johannes Bergba3943b2014-11-12 23:54:48 +01002016 struct ieee80211_key_conf *keyconf,
Luca Coelhod6ee54a2015-11-10 22:13:43 +02002017 u8 key_offset,
Johannes Bergba3943b2014-11-12 23:54:48 +01002018 bool mcast)
Johannes Berg8ca151b2013-01-24 14:25:36 +01002019{
Johannes Berg2f6319d2014-11-12 23:39:56 +01002020 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
Johannes Berg8ca151b2013-01-24 14:25:36 +01002021 int ret;
Johannes Berg2f6319d2014-11-12 23:39:56 +01002022 const u8 *addr;
Johannes Berg8ca151b2013-01-24 14:25:36 +01002023 struct ieee80211_key_seq seq;
2024 u16 p1k[5];
2025
Johannes Berg8ca151b2013-01-24 14:25:36 +01002026 switch (keyconf->cipher) {
2027 case WLAN_CIPHER_SUITE_TKIP:
2028 addr = iwl_mvm_get_mac_addr(mvm, vif, sta);
2029 /* get phase 1 key from mac80211 */
2030 ieee80211_get_key_rx_seq(keyconf, 0, &seq);
2031 ieee80211_get_tkip_rx_p1k(keyconf, addr, seq.tkip.iv32, p1k);
Johannes Bergba3943b2014-11-12 23:54:48 +01002032 ret = iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, mcast,
Luca Coelhod6ee54a2015-11-10 22:13:43 +02002033 seq.tkip.iv32, p1k, 0, key_offset);
Johannes Berg8ca151b2013-01-24 14:25:36 +01002034 break;
2035 case WLAN_CIPHER_SUITE_CCMP:
Johannes Bergba3943b2014-11-12 23:54:48 +01002036 case WLAN_CIPHER_SUITE_WEP40:
2037 case WLAN_CIPHER_SUITE_WEP104:
2038 ret = iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, mcast,
Luca Coelhod6ee54a2015-11-10 22:13:43 +02002039 0, NULL, 0, key_offset);
Johannes Berg8ca151b2013-01-24 14:25:36 +01002040 break;
2041 default:
Johannes Bergba3943b2014-11-12 23:54:48 +01002042 ret = iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, mcast,
Luca Coelhod6ee54a2015-11-10 22:13:43 +02002043 0, NULL, 0, key_offset);
Johannes Berg8ca151b2013-01-24 14:25:36 +01002044 }
2045
Johannes Berg8ca151b2013-01-24 14:25:36 +01002046 return ret;
2047}
2048
Johannes Berg2f6319d2014-11-12 23:39:56 +01002049static int __iwl_mvm_remove_sta_key(struct iwl_mvm *mvm, u8 sta_id,
Johannes Bergba3943b2014-11-12 23:54:48 +01002050 struct ieee80211_key_conf *keyconf,
2051 bool mcast)
Johannes Berg8ca151b2013-01-24 14:25:36 +01002052{
Max Stepanov5a258aa2013-04-07 09:11:21 +03002053 struct iwl_mvm_add_sta_key_cmd cmd = {};
Johannes Berg8ca151b2013-01-24 14:25:36 +01002054 __le16 key_flags;
Johannes Berg79920742014-11-03 15:43:04 +01002055 int ret;
2056 u32 status;
Johannes Berg8ca151b2013-01-24 14:25:36 +01002057
Emmanuel Grumbach8115efb2013-02-05 10:08:35 +02002058 key_flags = cpu_to_le16((keyconf->keyidx << STA_KEY_FLG_KEYID_POS) &
2059 STA_KEY_FLG_KEYID_MSK);
Johannes Berg8ca151b2013-01-24 14:25:36 +01002060 key_flags |= cpu_to_le16(STA_KEY_FLG_NO_ENC | STA_KEY_FLG_WEP_KEY_MAP);
2061 key_flags |= cpu_to_le16(STA_KEY_NOT_VALID);
2062
Johannes Bergba3943b2014-11-12 23:54:48 +01002063 if (mcast)
Johannes Berg8ca151b2013-01-24 14:25:36 +01002064 key_flags |= cpu_to_le16(STA_KEY_MULTICAST);
2065
Max Stepanov5a258aa2013-04-07 09:11:21 +03002066 cmd.key_flags = key_flags;
2067 cmd.key_offset = keyconf->hw_key_idx;
Johannes Berg8ca151b2013-01-24 14:25:36 +01002068 cmd.sta_id = sta_id;
2069
Johannes Berg8ca151b2013-01-24 14:25:36 +01002070 status = ADD_STA_SUCCESS;
Emmanuel Grumbachf9dc0002014-03-30 09:53:27 +03002071 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, sizeof(cmd),
2072 &cmd, &status);
Johannes Berg8ca151b2013-01-24 14:25:36 +01002073
2074 switch (status) {
2075 case ADD_STA_SUCCESS:
2076 IWL_DEBUG_WEP(mvm, "MODIFY_STA: remove sta key passed\n");
2077 break;
2078 default:
2079 ret = -EIO;
2080 IWL_ERR(mvm, "MODIFY_STA: remove sta key failed\n");
2081 break;
2082 }
2083
2084 return ret;
2085}
2086
Johannes Berg2f6319d2014-11-12 23:39:56 +01002087int iwl_mvm_set_sta_key(struct iwl_mvm *mvm,
2088 struct ieee80211_vif *vif,
2089 struct ieee80211_sta *sta,
2090 struct ieee80211_key_conf *keyconf,
Luca Coelhod6ee54a2015-11-10 22:13:43 +02002091 u8 key_offset)
Johannes Berg2f6319d2014-11-12 23:39:56 +01002092{
Johannes Bergba3943b2014-11-12 23:54:48 +01002093 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
Johannes Berg5f7a1842015-12-11 09:36:10 +01002094 struct iwl_mvm_sta *mvm_sta;
Johannes Berg2f6319d2014-11-12 23:39:56 +01002095 u8 sta_id;
2096 int ret;
Matti Gottlieb11828db2015-06-01 15:15:11 +03002097 static const u8 __maybe_unused zero_addr[ETH_ALEN] = {0};
Johannes Berg2f6319d2014-11-12 23:39:56 +01002098
2099 lockdep_assert_held(&mvm->mutex);
2100
2101 /* Get the station id from the mvm local station table */
Johannes Berg5f7a1842015-12-11 09:36:10 +01002102 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta);
2103 if (!mvm_sta) {
2104 IWL_ERR(mvm, "Failed to find station\n");
Johannes Berg2f6319d2014-11-12 23:39:56 +01002105 return -EINVAL;
2106 }
Johannes Berg5f7a1842015-12-11 09:36:10 +01002107 sta_id = mvm_sta->sta_id;
Johannes Berg2f6319d2014-11-12 23:39:56 +01002108
2109 if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC) {
2110 ret = iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, false);
2111 goto end;
2112 }
2113
2114 /*
2115 * It is possible that the 'sta' parameter is NULL, and thus
2116 * there is a need to retrieve the sta from the local station table.
2117 */
2118 if (!sta) {
2119 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
2120 lockdep_is_held(&mvm->mutex));
2121 if (IS_ERR_OR_NULL(sta)) {
2122 IWL_ERR(mvm, "Invalid station id\n");
2123 return -EINVAL;
2124 }
2125 }
2126
2127 if (WARN_ON_ONCE(iwl_mvm_sta_from_mac80211(sta)->vif != vif))
2128 return -EINVAL;
2129
Luca Coelhod6ee54a2015-11-10 22:13:43 +02002130 /* If the key_offset is not pre-assigned, we need to find a
2131 * new offset to use. In normal cases, the offset is not
2132 * pre-assigned, but during HW_RESTART we want to reuse the
2133 * same indices, so we pass them when this function is called.
2134 *
2135 * In D3 entry, we need to hardcoded the indices (because the
2136 * firmware hardcodes the PTK offset to 0). In this case, we
2137 * need to make sure we don't overwrite the hw_key_idx in the
2138 * keyconf structure, because otherwise we cannot configure
2139 * the original ones back when resuming.
2140 */
2141 if (key_offset == STA_KEY_IDX_INVALID) {
2142 key_offset = iwl_mvm_set_fw_key_idx(mvm);
2143 if (key_offset == STA_KEY_IDX_INVALID)
Johannes Berg2f6319d2014-11-12 23:39:56 +01002144 return -ENOSPC;
Luca Coelhod6ee54a2015-11-10 22:13:43 +02002145 keyconf->hw_key_idx = key_offset;
Johannes Berg2f6319d2014-11-12 23:39:56 +01002146 }
2147
Luca Coelhod6ee54a2015-11-10 22:13:43 +02002148 ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf, key_offset, mcast);
Luca Coelho9c3deeb2015-11-11 01:06:17 +02002149 if (ret)
Johannes Bergba3943b2014-11-12 23:54:48 +01002150 goto end;
Johannes Bergba3943b2014-11-12 23:54:48 +01002151
2152 /*
2153 * For WEP, the same key is used for multicast and unicast. Upload it
2154 * again, using the same key offset, and now pointing the other one
2155 * to the same key slot (offset).
2156 * If this fails, remove the original as well.
2157 */
2158 if (keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 ||
2159 keyconf->cipher == WLAN_CIPHER_SUITE_WEP104) {
Luca Coelhod6ee54a2015-11-10 22:13:43 +02002160 ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf,
2161 key_offset, !mcast);
Johannes Bergba3943b2014-11-12 23:54:48 +01002162 if (ret) {
Johannes Bergba3943b2014-11-12 23:54:48 +01002163 __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast);
Luca Coelho9c3deeb2015-11-11 01:06:17 +02002164 goto end;
Johannes Bergba3943b2014-11-12 23:54:48 +01002165 }
2166 }
Johannes Berg2f6319d2014-11-12 23:39:56 +01002167
Luca Coelho9c3deeb2015-11-11 01:06:17 +02002168 __set_bit(key_offset, mvm->fw_key_table);
2169
Johannes Berg2f6319d2014-11-12 23:39:56 +01002170end:
2171 IWL_DEBUG_WEP(mvm, "key: cipher=%x len=%d idx=%d sta=%pM ret=%d\n",
2172 keyconf->cipher, keyconf->keylen, keyconf->keyidx,
Matti Gottlieb11828db2015-06-01 15:15:11 +03002173 sta ? sta->addr : zero_addr, ret);
Johannes Berg2f6319d2014-11-12 23:39:56 +01002174 return ret;
2175}
2176
2177int iwl_mvm_remove_sta_key(struct iwl_mvm *mvm,
2178 struct ieee80211_vif *vif,
2179 struct ieee80211_sta *sta,
2180 struct ieee80211_key_conf *keyconf)
2181{
Johannes Bergba3943b2014-11-12 23:54:48 +01002182 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
Johannes Berg5f7a1842015-12-11 09:36:10 +01002183 struct iwl_mvm_sta *mvm_sta;
2184 u8 sta_id = IWL_MVM_STATION_COUNT;
Johannes Berg2dc2a152015-06-16 17:09:18 +02002185 int ret, i;
Johannes Berg2f6319d2014-11-12 23:39:56 +01002186
2187 lockdep_assert_held(&mvm->mutex);
2188
Johannes Berg5f7a1842015-12-11 09:36:10 +01002189 /* Get the station from the mvm local station table */
2190 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta);
Johannes Berg2f6319d2014-11-12 23:39:56 +01002191
2192 IWL_DEBUG_WEP(mvm, "mvm remove dynamic key: idx=%d sta=%d\n",
2193 keyconf->keyidx, sta_id);
2194
2195 if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC)
2196 return iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, true);
2197
2198 if (!__test_and_clear_bit(keyconf->hw_key_idx, mvm->fw_key_table)) {
2199 IWL_ERR(mvm, "offset %d not used in fw key table.\n",
2200 keyconf->hw_key_idx);
2201 return -ENOENT;
2202 }
2203
Johannes Berg2dc2a152015-06-16 17:09:18 +02002204 /* track which key was deleted last */
2205 for (i = 0; i < STA_KEY_MAX_NUM; i++) {
2206 if (mvm->fw_key_deleted[i] < U8_MAX)
2207 mvm->fw_key_deleted[i]++;
2208 }
2209 mvm->fw_key_deleted[keyconf->hw_key_idx] = 0;
2210
Johannes Berg5f7a1842015-12-11 09:36:10 +01002211 if (!mvm_sta) {
Johannes Berg2f6319d2014-11-12 23:39:56 +01002212 IWL_DEBUG_WEP(mvm, "station non-existent, early return.\n");
2213 return 0;
2214 }
2215
Johannes Berg5f7a1842015-12-11 09:36:10 +01002216 sta_id = mvm_sta->sta_id;
2217
Johannes Bergba3943b2014-11-12 23:54:48 +01002218 ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast);
2219 if (ret)
2220 return ret;
2221
2222 /* delete WEP key twice to get rid of (now useless) offset */
2223 if (keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 ||
2224 keyconf->cipher == WLAN_CIPHER_SUITE_WEP104)
2225 ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, !mcast);
2226
2227 return ret;
Johannes Berg2f6319d2014-11-12 23:39:56 +01002228}
2229
Johannes Berg8ca151b2013-01-24 14:25:36 +01002230void iwl_mvm_update_tkip_key(struct iwl_mvm *mvm,
2231 struct ieee80211_vif *vif,
2232 struct ieee80211_key_conf *keyconf,
2233 struct ieee80211_sta *sta, u32 iv32,
2234 u16 *phase1key)
2235{
Beni Levc3eb5362013-02-06 17:22:18 +02002236 struct iwl_mvm_sta *mvm_sta;
Johannes Bergba3943b2014-11-12 23:54:48 +01002237 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
Johannes Berg8ca151b2013-01-24 14:25:36 +01002238
Beni Levc3eb5362013-02-06 17:22:18 +02002239 rcu_read_lock();
2240
Johannes Berg5f7a1842015-12-11 09:36:10 +01002241 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta);
2242 if (WARN_ON_ONCE(!mvm_sta))
Emmanuel Grumbach12f17212015-12-20 14:48:08 +02002243 goto unlock;
Johannes Bergba3943b2014-11-12 23:54:48 +01002244 iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, mcast,
Luca Coelhod6ee54a2015-11-10 22:13:43 +02002245 iv32, phase1key, CMD_ASYNC, keyconf->hw_key_idx);
Emmanuel Grumbach12f17212015-12-20 14:48:08 +02002246
2247 unlock:
Beni Levc3eb5362013-02-06 17:22:18 +02002248 rcu_read_unlock();
Johannes Berg8ca151b2013-01-24 14:25:36 +01002249}
2250
Johannes Berg9cc40712013-02-15 22:47:48 +01002251void iwl_mvm_sta_modify_ps_wake(struct iwl_mvm *mvm,
2252 struct ieee80211_sta *sta)
Johannes Berg8ca151b2013-01-24 14:25:36 +01002253{
Johannes Berg5b577a92013-11-14 18:20:04 +01002254 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
Emmanuel Grumbachf9dc0002014-03-30 09:53:27 +03002255 struct iwl_mvm_add_sta_cmd cmd = {
Johannes Berg8ca151b2013-01-24 14:25:36 +01002256 .add_modify = STA_MODE_MODIFY,
Johannes Berg9cc40712013-02-15 22:47:48 +01002257 .sta_id = mvmsta->sta_id,
Emmanuel Grumbach5af01772013-06-09 12:59:24 +03002258 .station_flags_msk = cpu_to_le32(STA_FLG_PS),
Johannes Berg9cc40712013-02-15 22:47:48 +01002259 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
Johannes Berg8ca151b2013-01-24 14:25:36 +01002260 };
2261 int ret;
2262
Sara Sharon854c5702016-01-26 13:17:47 +02002263 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC,
2264 iwl_mvm_add_sta_cmd_size(mvm), &cmd);
Johannes Berg8ca151b2013-01-24 14:25:36 +01002265 if (ret)
2266 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
2267}
2268
Johannes Berg9cc40712013-02-15 22:47:48 +01002269void iwl_mvm_sta_modify_sleep_tx_count(struct iwl_mvm *mvm,
2270 struct ieee80211_sta *sta,
Johannes Berg8ca151b2013-01-24 14:25:36 +01002271 enum ieee80211_frame_release_type reason,
Johannes Berg3e56ead2013-02-15 22:23:18 +01002272 u16 cnt, u16 tids, bool more_data,
2273 bool agg)
Johannes Berg8ca151b2013-01-24 14:25:36 +01002274{
Johannes Berg5b577a92013-11-14 18:20:04 +01002275 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
Emmanuel Grumbachf9dc0002014-03-30 09:53:27 +03002276 struct iwl_mvm_add_sta_cmd cmd = {
Johannes Berg8ca151b2013-01-24 14:25:36 +01002277 .add_modify = STA_MODE_MODIFY,
Johannes Berg9cc40712013-02-15 22:47:48 +01002278 .sta_id = mvmsta->sta_id,
Johannes Berg8ca151b2013-01-24 14:25:36 +01002279 .modify_mask = STA_MODIFY_SLEEPING_STA_TX_COUNT,
2280 .sleep_tx_count = cpu_to_le16(cnt),
Johannes Berg9cc40712013-02-15 22:47:48 +01002281 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
Johannes Berg8ca151b2013-01-24 14:25:36 +01002282 };
Johannes Berg3e56ead2013-02-15 22:23:18 +01002283 int tid, ret;
2284 unsigned long _tids = tids;
Johannes Berg8ca151b2013-01-24 14:25:36 +01002285
Johannes Berg3e56ead2013-02-15 22:23:18 +01002286 /* convert TIDs to ACs - we don't support TSPEC so that's OK
2287 * Note that this field is reserved and unused by firmware not
2288 * supporting GO uAPSD, so it's safe to always do this.
2289 */
2290 for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT)
2291 cmd.awake_acs |= BIT(tid_to_ucode_ac[tid]);
2292
2293 /* If we're releasing frames from aggregation queues then check if the
2294 * all queues combined that we're releasing frames from have
2295 * - more frames than the service period, in which case more_data
2296 * needs to be set
2297 * - fewer than 'cnt' frames, in which case we need to adjust the
2298 * firmware command (but do that unconditionally)
2299 */
2300 if (agg) {
2301 int remaining = cnt;
Emmanuel Grumbach36be0eb2015-11-05 10:32:31 +02002302 int sleep_tx_count;
Johannes Berg3e56ead2013-02-15 22:23:18 +01002303
2304 spin_lock_bh(&mvmsta->lock);
2305 for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT) {
2306 struct iwl_mvm_tid_data *tid_data;
2307 u16 n_queued;
2308
2309 tid_data = &mvmsta->tid_data[tid];
2310 if (WARN(tid_data->state != IWL_AGG_ON &&
2311 tid_data->state != IWL_EMPTYING_HW_QUEUE_DELBA,
2312 "TID %d state is %d\n",
2313 tid, tid_data->state)) {
2314 spin_unlock_bh(&mvmsta->lock);
2315 ieee80211_sta_eosp(sta);
2316 return;
2317 }
2318
2319 n_queued = iwl_mvm_tid_queued(tid_data);
2320 if (n_queued > remaining) {
2321 more_data = true;
2322 remaining = 0;
2323 break;
2324 }
2325 remaining -= n_queued;
2326 }
Emmanuel Grumbach36be0eb2015-11-05 10:32:31 +02002327 sleep_tx_count = cnt - remaining;
2328 if (reason == IEEE80211_FRAME_RELEASE_UAPSD)
2329 mvmsta->sleep_tx_count = sleep_tx_count;
Johannes Berg3e56ead2013-02-15 22:23:18 +01002330 spin_unlock_bh(&mvmsta->lock);
2331
Emmanuel Grumbach36be0eb2015-11-05 10:32:31 +02002332 cmd.sleep_tx_count = cpu_to_le16(sleep_tx_count);
Johannes Berg3e56ead2013-02-15 22:23:18 +01002333 if (WARN_ON(cnt - remaining == 0)) {
2334 ieee80211_sta_eosp(sta);
2335 return;
2336 }
2337 }
2338
2339 /* Note: this is ignored by firmware not supporting GO uAPSD */
2340 if (more_data)
2341 cmd.sleep_state_flags |= cpu_to_le16(STA_SLEEP_STATE_MOREDATA);
2342
2343 if (reason == IEEE80211_FRAME_RELEASE_PSPOLL) {
2344 mvmsta->next_status_eosp = true;
2345 cmd.sleep_state_flags |= cpu_to_le16(STA_SLEEP_STATE_PS_POLL);
2346 } else {
2347 cmd.sleep_state_flags |= cpu_to_le16(STA_SLEEP_STATE_UAPSD);
2348 }
2349
Emmanuel Grumbach156f92f2015-11-24 14:55:18 +02002350 /* block the Tx queues until the FW updated the sleep Tx count */
2351 iwl_trans_block_txq_ptrs(mvm->trans, true);
2352
2353 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA,
2354 CMD_ASYNC | CMD_WANT_ASYNC_CALLBACK,
Sara Sharon854c5702016-01-26 13:17:47 +02002355 iwl_mvm_add_sta_cmd_size(mvm), &cmd);
Johannes Berg8ca151b2013-01-24 14:25:36 +01002356 if (ret)
2357 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
2358}
Johannes Berg3e56ead2013-02-15 22:23:18 +01002359
Johannes Berg04168412015-06-23 21:22:09 +02002360void iwl_mvm_rx_eosp_notif(struct iwl_mvm *mvm,
2361 struct iwl_rx_cmd_buffer *rxb)
Johannes Berg3e56ead2013-02-15 22:23:18 +01002362{
2363 struct iwl_rx_packet *pkt = rxb_addr(rxb);
2364 struct iwl_mvm_eosp_notification *notif = (void *)pkt->data;
2365 struct ieee80211_sta *sta;
2366 u32 sta_id = le32_to_cpu(notif->sta_id);
2367
2368 if (WARN_ON_ONCE(sta_id >= IWL_MVM_STATION_COUNT))
Johannes Berg04168412015-06-23 21:22:09 +02002369 return;
Johannes Berg3e56ead2013-02-15 22:23:18 +01002370
2371 rcu_read_lock();
2372 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
2373 if (!IS_ERR_OR_NULL(sta))
2374 ieee80211_sta_eosp(sta);
2375 rcu_read_unlock();
Johannes Berg3e56ead2013-02-15 22:23:18 +01002376}
Andrei Otcheretianski09b0ce12014-05-25 17:07:38 +03002377
2378void iwl_mvm_sta_modify_disable_tx(struct iwl_mvm *mvm,
2379 struct iwl_mvm_sta *mvmsta, bool disable)
2380{
2381 struct iwl_mvm_add_sta_cmd cmd = {
2382 .add_modify = STA_MODE_MODIFY,
2383 .sta_id = mvmsta->sta_id,
2384 .station_flags = disable ? cpu_to_le32(STA_FLG_DISABLE_TX) : 0,
2385 .station_flags_msk = cpu_to_le32(STA_FLG_DISABLE_TX),
2386 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
2387 };
2388 int ret;
2389
Sara Sharon854c5702016-01-26 13:17:47 +02002390 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC,
2391 iwl_mvm_add_sta_cmd_size(mvm), &cmd);
Andrei Otcheretianski09b0ce12014-05-25 17:07:38 +03002392 if (ret)
2393 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
2394}
Andrei Otcheretianski003e52362014-05-25 17:24:22 +03002395
2396void iwl_mvm_sta_modify_disable_tx_ap(struct iwl_mvm *mvm,
2397 struct ieee80211_sta *sta,
2398 bool disable)
2399{
2400 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
2401
2402 spin_lock_bh(&mvm_sta->lock);
2403
2404 if (mvm_sta->disable_tx == disable) {
2405 spin_unlock_bh(&mvm_sta->lock);
2406 return;
2407 }
2408
2409 mvm_sta->disable_tx = disable;
2410
2411 /*
Sara Sharon0d365ae2015-03-31 12:24:05 +03002412 * Tell mac80211 to start/stop queuing tx for this station,
2413 * but don't stop queuing if there are still pending frames
Andrei Otcheretianski003e52362014-05-25 17:24:22 +03002414 * for this station.
2415 */
2416 if (disable || !atomic_read(&mvm->pending_frames[mvm_sta->sta_id]))
2417 ieee80211_sta_block_awake(mvm->hw, sta, disable);
2418
2419 iwl_mvm_sta_modify_disable_tx(mvm, mvm_sta, disable);
2420
2421 spin_unlock_bh(&mvm_sta->lock);
2422}
2423
2424void iwl_mvm_modify_all_sta_disable_tx(struct iwl_mvm *mvm,
2425 struct iwl_mvm_vif *mvmvif,
2426 bool disable)
2427{
2428 struct ieee80211_sta *sta;
2429 struct iwl_mvm_sta *mvm_sta;
2430 int i;
2431
2432 lockdep_assert_held(&mvm->mutex);
2433
2434 /* Block/unblock all the stations of the given mvmvif */
2435 for (i = 0; i < IWL_MVM_STATION_COUNT; i++) {
2436 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[i],
2437 lockdep_is_held(&mvm->mutex));
2438 if (IS_ERR_OR_NULL(sta))
2439 continue;
2440
2441 mvm_sta = iwl_mvm_sta_from_mac80211(sta);
2442 if (mvm_sta->mac_id_n_color !=
2443 FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color))
2444 continue;
2445
2446 iwl_mvm_sta_modify_disable_tx_ap(mvm, sta, disable);
2447 }
2448}
Luciano Coelhodc88b4b2014-11-10 11:10:14 +02002449
2450void iwl_mvm_csa_client_absent(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2451{
2452 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2453 struct iwl_mvm_sta *mvmsta;
2454
2455 rcu_read_lock();
2456
2457 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, mvmvif->ap_sta_id);
2458
2459 if (!WARN_ON(!mvmsta))
2460 iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, true);
2461
2462 rcu_read_unlock();
2463}