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iwlwifi: mvm: use pre-RCU-sync sta removal operation
[linux-block.git] / drivers / net / wireless / iwlwifi / mvm / sta.c
CommitLineData
8ca151b5
JB		 1/******************************************************************************
2 *
3 * This file is provided under a dual BSD/GPLv2 license. When using or
4 * redistributing this file, you may do so under either license.
5 *
6 * GPL LICENSE SUMMARY
7 *
8 * Copyright(c) 2012 - 2013 Intel Corporation. All rights reserved.
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of version 2 of the GNU General Public License as
12 * published by the Free Software Foundation.
13 *
14 * This program is distributed in the hope that it will be useful, but
15 * WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
22 * USA
23 *
24 * The full GNU General Public License is included in this distribution
410dc5aa 25 * in the file called COPYING.
8ca151b5
JB		 26 *
27 * Contact Information:
28 * Intel Linux Wireless <ilw@linux.intel.com>
29 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
30 *
31 * BSD LICENSE
32 *
33 * Copyright(c) 2012 - 2013 Intel Corporation. All rights reserved.
34 * All rights reserved.
35 *
36 * Redistribution and use in source and binary forms, with or without
37 * modification, are permitted provided that the following conditions
38 * are met:
39 *
40 * * Redistributions of source code must retain the above copyright
41 * notice, this list of conditions and the following disclaimer.
42 * * Redistributions in binary form must reproduce the above copyright
43 * notice, this list of conditions and the following disclaimer in
44 * the documentation and/or other materials provided with the
45 * distribution.
46 * * Neither the name Intel Corporation nor the names of its
47 * contributors may be used to endorse or promote products derived
48 * from this software without specific prior written permission.
49 *
50 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
51 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
52 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
53 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
54 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
55 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
56 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
57 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
58 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
59 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
60 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
61 *
62 *****************************************************************************/
63#include <net/mac80211.h>
64
65#include "mvm.h"
66#include "sta.h"
9ee718aa 67#include "rs.h"
8ca151b5 68
5a258aae
MS		 69static void iwl_mvm_add_sta_cmd_v6_to_v5(struct iwl_mvm_add_sta_cmd_v6 *cmd_v6,
70 struct iwl_mvm_add_sta_cmd_v5 *cmd_v5)
71{
72 memset(cmd_v5, 0, sizeof(*cmd_v5));
73
74 cmd_v5->add_modify = cmd_v6->add_modify;
75 cmd_v5->tid_disable_tx = cmd_v6->tid_disable_tx;
76 cmd_v5->mac_id_n_color = cmd_v6->mac_id_n_color;
77 memcpy(cmd_v5->addr, cmd_v6->addr, ETH_ALEN);
78 cmd_v5->sta_id = cmd_v6->sta_id;
79 cmd_v5->modify_mask = cmd_v6->modify_mask;
80 cmd_v5->station_flags = cmd_v6->station_flags;
81 cmd_v5->station_flags_msk = cmd_v6->station_flags_msk;
82 cmd_v5->add_immediate_ba_tid = cmd_v6->add_immediate_ba_tid;
83 cmd_v5->remove_immediate_ba_tid = cmd_v6->remove_immediate_ba_tid;
84 cmd_v5->add_immediate_ba_ssn = cmd_v6->add_immediate_ba_ssn;
85 cmd_v5->sleep_tx_count = cmd_v6->sleep_tx_count;
86 cmd_v5->sleep_state_flags = cmd_v6->sleep_state_flags;
87 cmd_v5->assoc_id = cmd_v6->assoc_id;
88 cmd_v5->beamform_flags = cmd_v6->beamform_flags;
89 cmd_v5->tfd_queue_msk = cmd_v6->tfd_queue_msk;
90}
91
92static void
93iwl_mvm_add_sta_key_to_add_sta_cmd_v5(struct iwl_mvm_add_sta_key_cmd *key_cmd,
94 struct iwl_mvm_add_sta_cmd_v5 *sta_cmd,
95 u32 mac_id_n_color)
96{
97 memset(sta_cmd, 0, sizeof(*sta_cmd));
98
99 sta_cmd->sta_id = key_cmd->sta_id;
100 sta_cmd->add_modify = STA_MODE_MODIFY;
101 sta_cmd->modify_mask = STA_MODIFY_KEY;
102 sta_cmd->mac_id_n_color = cpu_to_le32(mac_id_n_color);
103
104 sta_cmd->key.key_offset = key_cmd->key_offset;
105 sta_cmd->key.key_flags = key_cmd->key_flags;
106 memcpy(sta_cmd->key.key, key_cmd->key, sizeof(sta_cmd->key.key));
107 sta_cmd->key.tkip_rx_tsc_byte2 = key_cmd->tkip_rx_tsc_byte2;
108 memcpy(sta_cmd->key.tkip_rx_ttak, key_cmd->tkip_rx_ttak,
109 sizeof(sta_cmd->key.tkip_rx_ttak));
110}
111
112static int iwl_mvm_send_add_sta_cmd_status(struct iwl_mvm *mvm,
113 struct iwl_mvm_add_sta_cmd_v6 *cmd,
114 int *status)
115{
116 struct iwl_mvm_add_sta_cmd_v5 cmd_v5;
117
118 if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_STA_KEY_CMD)
119 return iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, sizeof(*cmd),
120 cmd, status);
121
122 iwl_mvm_add_sta_cmd_v6_to_v5(cmd, &cmd_v5);
123
124 return iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, sizeof(cmd_v5),
125 &cmd_v5, status);
126}
127
128static int iwl_mvm_send_add_sta_cmd(struct iwl_mvm *mvm, u32 flags,
129 struct iwl_mvm_add_sta_cmd_v6 *cmd)
130{
131 struct iwl_mvm_add_sta_cmd_v5 cmd_v5;
132
133 if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_STA_KEY_CMD)
134 return iwl_mvm_send_cmd_pdu(mvm, ADD_STA, flags,
135 sizeof(*cmd), cmd);
136
137 iwl_mvm_add_sta_cmd_v6_to_v5(cmd, &cmd_v5);
138
139 return iwl_mvm_send_cmd_pdu(mvm, ADD_STA, flags, sizeof(cmd_v5),
140 &cmd_v5);
141}
142
143static int
144iwl_mvm_send_add_sta_key_cmd_status(struct iwl_mvm *mvm,
145 struct iwl_mvm_add_sta_key_cmd *cmd,
146 u32 mac_id_n_color,
147 int *status)
148{
149 struct iwl_mvm_add_sta_cmd_v5 sta_cmd;
150
151 if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_STA_KEY_CMD)
152 return iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY,
153 sizeof(*cmd), cmd, status);
154
155 iwl_mvm_add_sta_key_to_add_sta_cmd_v5(cmd, &sta_cmd, mac_id_n_color);
156
157 return iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, sizeof(sta_cmd),
158 &sta_cmd, status);
159}
160
161static int iwl_mvm_send_add_sta_key_cmd(struct iwl_mvm *mvm,
162 u32 flags,
163 struct iwl_mvm_add_sta_key_cmd *cmd,
164 u32 mac_id_n_color)
165{
166 struct iwl_mvm_add_sta_cmd_v5 sta_cmd;
167
168 if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_STA_KEY_CMD)
169 return iwl_mvm_send_cmd_pdu(mvm, ADD_STA_KEY, flags,
170 sizeof(*cmd), cmd);
171
172 iwl_mvm_add_sta_key_to_add_sta_cmd_v5(cmd, &sta_cmd, mac_id_n_color);
173
174 return iwl_mvm_send_cmd_pdu(mvm, ADD_STA, flags, sizeof(sta_cmd),
175 &sta_cmd);
176}
177
8ca151b5
JB		 178static int iwl_mvm_find_free_sta_id(struct iwl_mvm *mvm)
179{
180 int sta_id;
181
182 WARN_ON_ONCE(test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status));
183
184 lockdep_assert_held(&mvm->mutex);
185
186 /* Don't take rcu_read_lock() since we are protected by mvm->mutex */
187 for (sta_id = 0; sta_id < IWL_MVM_STATION_COUNT; sta_id++)
188 if (!rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
189 lockdep_is_held(&mvm->mutex)))
190 return sta_id;
191 return IWL_MVM_STATION_COUNT;
192}
193
7a453973
JB		 194/* send station add/update command to firmware */
195int iwl_mvm_sta_send_to_fw(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
196 bool update)
8ca151b5
JB		 197{
198 struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv;
5a258aae 199 struct iwl_mvm_add_sta_cmd_v6 add_sta_cmd;
8ca151b5
JB		 200 int ret;
201 u32 status;
202 u32 agg_size = 0, mpdu_dens = 0;
203
204 memset(&add_sta_cmd, 0, sizeof(add_sta_cmd));
205
206 add_sta_cmd.sta_id = mvm_sta->sta_id;
207 add_sta_cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color);
7a453973
JB		 208 if (!update) {
209 add_sta_cmd.tfd_queue_msk = cpu_to_le32(mvm_sta->tfd_queue_msk);
210 memcpy(&add_sta_cmd.addr, sta->addr, ETH_ALEN);
211 }
212 add_sta_cmd.add_modify = update ? 1 : 0;
8ca151b5 213
5bc5aaad
JB		 214 add_sta_cmd.station_flags_msk |= cpu_to_le32(STA_FLG_FAT_EN_MSK |
215 STA_FLG_MIMO_EN_MSK);
216
217 switch (sta->bandwidth) {
218 case IEEE80211_STA_RX_BW_160:
219 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_160MHZ);
220 /* fall through */
221 case IEEE80211_STA_RX_BW_80:
222 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_80MHZ);
223 /* fall through */
224 case IEEE80211_STA_RX_BW_40:
225 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_40MHZ);
226 /* fall through */
227 case IEEE80211_STA_RX_BW_20:
228 if (sta->ht_cap.ht_supported)
229 add_sta_cmd.station_flags |=
230 cpu_to_le32(STA_FLG_FAT_EN_20MHZ);
231 break;
232 }
233
234 switch (sta->rx_nss) {
235 case 1:
236 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_SISO);
237 break;
238 case 2:
239 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_MIMO2);
240 break;
241 case 3 ... 8:
242 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_MIMO3);
243 break;
244 }
245
246 switch (sta->smps_mode) {
247 case IEEE80211_SMPS_AUTOMATIC:
248 case IEEE80211_SMPS_NUM_MODES:
249 WARN_ON(1);
250 break;
251 case IEEE80211_SMPS_STATIC:
252 /* override NSS */
253 add_sta_cmd.station_flags &= ~cpu_to_le32(STA_FLG_MIMO_EN_MSK);
254 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_SISO);
255 break;
256 case IEEE80211_SMPS_DYNAMIC:
257 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_RTS_MIMO_PROT);
258 break;
259 case IEEE80211_SMPS_OFF:
260 /* nothing */
261 break;
262 }
8ca151b5
JB		 263
264 if (sta->ht_cap.ht_supported) {
265 add_sta_cmd.station_flags_msk |=
266 cpu_to_le32(STA_FLG_MAX_AGG_SIZE_MSK |
267 STA_FLG_AGG_MPDU_DENS_MSK);
268
269 mpdu_dens = sta->ht_cap.ampdu_density;
270 }
271
272 if (sta->vht_cap.vht_supported) {
273 agg_size = sta->vht_cap.cap &
274 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK;
275 agg_size >>=
276 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_SHIFT;
277 } else if (sta->ht_cap.ht_supported) {
278 agg_size = sta->ht_cap.ampdu_factor;
279 }
280
281 add_sta_cmd.station_flags |=
282 cpu_to_le32(agg_size << STA_FLG_MAX_AGG_SIZE_SHIFT);
283 add_sta_cmd.station_flags |=
284 cpu_to_le32(mpdu_dens << STA_FLG_AGG_MPDU_DENS_SHIFT);
285
286 status = ADD_STA_SUCCESS;
5a258aae 287 ret = iwl_mvm_send_add_sta_cmd_status(mvm, &add_sta_cmd, &status);
8ca151b5
JB		 288 if (ret)
289 return ret;
290
291 switch (status) {
292 case ADD_STA_SUCCESS:
293 IWL_DEBUG_ASSOC(mvm, "ADD_STA PASSED\n");
294 break;
295 default:
296 ret = -EIO;
297 IWL_ERR(mvm, "ADD_STA failed\n");
298 break;
299 }
300
301 return ret;
302}
303
304int iwl_mvm_add_sta(struct iwl_mvm *mvm,
305 struct ieee80211_vif *vif,
306 struct ieee80211_sta *sta)
307{
308 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
309 struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv;
310 int i, ret, sta_id;
311
312 lockdep_assert_held(&mvm->mutex);
313
314 if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
315 sta_id = iwl_mvm_find_free_sta_id(mvm);
316 else
317 sta_id = mvm_sta->sta_id;
318
319 if (WARN_ON_ONCE(sta_id == IWL_MVM_STATION_COUNT))
320 return -ENOSPC;
321
322 spin_lock_init(&mvm_sta->lock);
323
324 mvm_sta->sta_id = sta_id;
325 mvm_sta->mac_id_n_color = FW_CMD_ID_AND_COLOR(mvmvif->id,
326 mvmvif->color);
327 mvm_sta->vif = vif;
328 mvm_sta->max_agg_bufsize = LINK_QUAL_AGG_FRAME_LIMIT_DEF;
9ee718aa
EL		 329 mvm_sta->tx_protection = 0;
330 mvm_sta->tt_tx_protection = false;
8ca151b5
JB		 331
332 /* HW restart, don't assume the memory has been zeroed */
e3d4bc8c 333 atomic_set(&mvm->pending_frames[sta_id], 0);
8ca151b5
JB		 334 mvm_sta->tid_disable_agg = 0;
335 mvm_sta->tfd_queue_msk = 0;
336 for (i = 0; i < IEEE80211_NUM_ACS; i++)
337 if (vif->hw_queue[i] != IEEE80211_INVAL_HW_QUEUE)
338 mvm_sta->tfd_queue_msk |= BIT(vif->hw_queue[i]);
339
6d9d32b8
JB		 340 /* for HW restart - reset everything but the sequence number */
341 for (i = 0; i < IWL_MAX_TID_COUNT; i++) {
342 u16 seq = mvm_sta->tid_data[i].seq_number;
343 memset(&mvm_sta->tid_data[i], 0, sizeof(mvm_sta->tid_data[i]));
344 mvm_sta->tid_data[i].seq_number = seq;
345 }
8ca151b5 346
7a453973 347 ret = iwl_mvm_sta_send_to_fw(mvm, sta, false);
8ca151b5
JB		 348 if (ret)
349 return ret;
350
351 /* The first station added is the AP, the others are TDLS STAs */
352 if (vif->type == NL80211_IFTYPE_STATION &&
353 mvmvif->ap_sta_id == IWL_MVM_STATION_COUNT)
354 mvmvif->ap_sta_id = sta_id;
355
356 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta_id], sta);
357
358 return 0;
359}
360
7a453973
JB		 361int iwl_mvm_update_sta(struct iwl_mvm *mvm,
362 struct ieee80211_vif *vif,
363 struct ieee80211_sta *sta)
364{
365 return iwl_mvm_sta_send_to_fw(mvm, sta, true);
366}
367
8ca151b5
JB		 368int iwl_mvm_drain_sta(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta,
369 bool drain)
370{
5a258aae 371 struct iwl_mvm_add_sta_cmd_v6 cmd = {};
8ca151b5
JB		 372 int ret;
373 u32 status;
374
375 lockdep_assert_held(&mvm->mutex);
376
377 cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color);
378 cmd.sta_id = mvmsta->sta_id;
379 cmd.add_modify = STA_MODE_MODIFY;
380 cmd.station_flags = drain ? cpu_to_le32(STA_FLG_DRAIN_FLOW) : 0;
381 cmd.station_flags_msk = cpu_to_le32(STA_FLG_DRAIN_FLOW);
382
383 status = ADD_STA_SUCCESS;
5a258aae 384 ret = iwl_mvm_send_add_sta_cmd_status(mvm, &cmd, &status);
8ca151b5
JB		 385 if (ret)
386 return ret;
387
388 switch (status) {
389 case ADD_STA_SUCCESS:
390 IWL_DEBUG_INFO(mvm, "Frames for staid %d will drained in fw\n",
391 mvmsta->sta_id);
392 break;
393 default:
394 ret = -EIO;
395 IWL_ERR(mvm, "Couldn't drain frames for staid %d\n",
396 mvmsta->sta_id);
397 break;
398 }
399
400 return ret;
401}
402
403/*
404 * Remove a station from the FW table. Before sending the command to remove
405 * the station validate that the station is indeed known to the driver (sanity
406 * only).
407 */
408static int iwl_mvm_rm_sta_common(struct iwl_mvm *mvm, u8 sta_id)
409{
410 struct ieee80211_sta *sta;
411 struct iwl_mvm_rm_sta_cmd rm_sta_cmd = {
412 .sta_id = sta_id,
413 };
414 int ret;
415
416 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
417 lockdep_is_held(&mvm->mutex));
418
419 /* Note: internal stations are marked as error values */
420 if (!sta) {
421 IWL_ERR(mvm, "Invalid station id\n");
422 return -EINVAL;
423 }
424
425 ret = iwl_mvm_send_cmd_pdu(mvm, REMOVE_STA, CMD_SYNC,
426 sizeof(rm_sta_cmd), &rm_sta_cmd);
427 if (ret) {
428 IWL_ERR(mvm, "Failed to remove station. Id=%d\n", sta_id);
429 return ret;
430 }
431
432 return 0;
433}
434
435void iwl_mvm_sta_drained_wk(struct work_struct *wk)
436{
437 struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm, sta_drained_wk);
438 u8 sta_id;
439
440 /*
441 * The mutex is needed because of the SYNC cmd, but not only: if the
442 * work would run concurrently with iwl_mvm_rm_sta, it would run before
443 * iwl_mvm_rm_sta sets the station as busy, and exit. Then
444 * iwl_mvm_rm_sta would set the station as busy, and nobody will clean
445 * that later.
446 */
447 mutex_lock(&mvm->mutex);
448
449 for_each_set_bit(sta_id, mvm->sta_drained, IWL_MVM_STATION_COUNT) {
450 int ret;
451 struct ieee80211_sta *sta =
452 rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
453 lockdep_is_held(&mvm->mutex));
454
1ddbbb0c
JB		 455 /*
456 * This station is in use or RCU-removed; the latter happens in
457 * managed mode, where mac80211 removes the station before we
458 * can remove it from firmware (we can only do that after the
459 * MAC is marked unassociated), and possibly while the deauth
460 * frame to disconnect from the AP is still queued. Then, the
461 * station pointer is -ENOENT when the last skb is reclaimed.
462 */
463 if (!IS_ERR(sta) || PTR_ERR(sta) == -ENOENT)
8ca151b5
JB		 464 continue;
465
466 if (PTR_ERR(sta) == -EINVAL) {
467 IWL_ERR(mvm, "Drained sta %d, but it is internal?\n",
468 sta_id);
469 continue;
470 }
471
472 if (!sta) {
473 IWL_ERR(mvm, "Drained sta %d, but it was NULL?\n",
474 sta_id);
475 continue;
476 }
477
478 WARN_ON(PTR_ERR(sta) != -EBUSY);
479 /* This station was removed and we waited until it got drained,
480 * we can now proceed and remove it.
481 */
482 ret = iwl_mvm_rm_sta_common(mvm, sta_id);
483 if (ret) {
484 IWL_ERR(mvm,
485 "Couldn't remove sta %d after it was drained\n",
486 sta_id);
487 continue;
488 }
489 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta_id], NULL);
490 clear_bit(sta_id, mvm->sta_drained);
491 }
492
493 mutex_unlock(&mvm->mutex);
494}
495
496int iwl_mvm_rm_sta(struct iwl_mvm *mvm,
497 struct ieee80211_vif *vif,
498 struct ieee80211_sta *sta)
499{
500 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
501 struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv;
502 int ret;
503
504 lockdep_assert_held(&mvm->mutex);
505
506 if (vif->type == NL80211_IFTYPE_STATION &&
507 mvmvif->ap_sta_id == mvm_sta->sta_id) {
80d85655
EG		 508 /* flush its queues here since we are freeing mvm_sta */
509 ret = iwl_mvm_flush_tx_path(mvm, mvm_sta->tfd_queue_msk, true);
510
8ca151b5
JB		 511 /*
512 * Put a non-NULL since the fw station isn't removed.
513 * It will be removed after the MAC will be set as
514 * unassoc.
515 */
516 rcu_assign_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id],
517 ERR_PTR(-EINVAL));
518
8ca151b5
JB		 519 /* if we are associated - we can't remove the AP STA now */
520 if (vif->bss_conf.assoc)
521 return ret;
522
523 /* unassoc - go ahead - remove the AP STA now */
524 mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
525 }
526
e3d4bc8c
EG		 527 /*
528 * Make sure that the tx response code sees the station as -EBUSY and
529 * calls the drain worker.
530 */
531 spin_lock_bh(&mvm_sta->lock);
8ca151b5
JB		 532 /*
533 * There are frames pending on the AC queues for this station.
534 * We need to wait until all the frames are drained...
535 */
e3d4bc8c 536 if (atomic_read(&mvm->pending_frames[mvm_sta->sta_id])) {
8ca151b5
JB		 537 rcu_assign_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id],
538 ERR_PTR(-EBUSY));
e3d4bc8c
EG		 539 spin_unlock_bh(&mvm_sta->lock);
540 ret = iwl_mvm_drain_sta(mvm, mvm_sta, true);
8ca151b5 541 } else {
e3d4bc8c 542 spin_unlock_bh(&mvm_sta->lock);
8ca151b5
JB		 543 ret = iwl_mvm_rm_sta_common(mvm, mvm_sta->sta_id);
544 rcu_assign_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id], NULL);
545 }
546
547 return ret;
548}
549
550int iwl_mvm_rm_sta_id(struct iwl_mvm *mvm,
551 struct ieee80211_vif *vif,
552 u8 sta_id)
553{
554 int ret = iwl_mvm_rm_sta_common(mvm, sta_id);
555
556 lockdep_assert_held(&mvm->mutex);
557
558 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta_id], NULL);
559 return ret;
560}
561
562int iwl_mvm_allocate_int_sta(struct iwl_mvm *mvm, struct iwl_mvm_int_sta *sta,
563 u32 qmask)
564{
565 if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
566 sta->sta_id = iwl_mvm_find_free_sta_id(mvm);
567 if (WARN_ON_ONCE(sta->sta_id == IWL_MVM_STATION_COUNT))
568 return -ENOSPC;
569 }
570
571 sta->tfd_queue_msk = qmask;
572
573 /* put a non-NULL value so iterating over the stations won't stop */
574 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta->sta_id], ERR_PTR(-EINVAL));
575 return 0;
576}
577
578void iwl_mvm_dealloc_int_sta(struct iwl_mvm *mvm, struct iwl_mvm_int_sta *sta)
579{
580 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta->sta_id], NULL);
581 memset(sta, 0, sizeof(struct iwl_mvm_int_sta));
582 sta->sta_id = IWL_MVM_STATION_COUNT;
583}
584
585static int iwl_mvm_add_int_sta_common(struct iwl_mvm *mvm,
586 struct iwl_mvm_int_sta *sta,
587 const u8 *addr,
588 u16 mac_id, u16 color)
589{
5a258aae 590 struct iwl_mvm_add_sta_cmd_v6 cmd;
8ca151b5
JB		 591 int ret;
592 u32 status;
593
594 lockdep_assert_held(&mvm->mutex);
595
5a258aae 596 memset(&cmd, 0, sizeof(struct iwl_mvm_add_sta_cmd_v6));
8ca151b5
JB		 597 cmd.sta_id = sta->sta_id;
598 cmd.mac_id_n_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(mac_id,
599 color));
600
601 cmd.tfd_queue_msk = cpu_to_le32(sta->tfd_queue_msk);
602
603 if (addr)
604 memcpy(cmd.addr, addr, ETH_ALEN);
605
5a258aae 606 ret = iwl_mvm_send_add_sta_cmd_status(mvm, &cmd, &status);
8ca151b5
JB		 607 if (ret)
608 return ret;
609
610 switch (status) {
611 case ADD_STA_SUCCESS:
612 IWL_DEBUG_INFO(mvm, "Internal station added.\n");
613 return 0;
614 default:
615 ret = -EIO;
616 IWL_ERR(mvm, "Add internal station failed, status=0x%x\n",
617 status);
618 break;
619 }
620 return ret;
621}
622
623int iwl_mvm_add_aux_sta(struct iwl_mvm *mvm)
624{
625 int ret;
626
627 lockdep_assert_held(&mvm->mutex);
628
629 /* Add the aux station, but without any queues */
630 ret = iwl_mvm_allocate_int_sta(mvm, &mvm->aux_sta, 0);
631 if (ret)
632 return ret;
633
634 ret = iwl_mvm_add_int_sta_common(mvm, &mvm->aux_sta, NULL,
635 MAC_INDEX_AUX, 0);
636
637 if (ret)
638 iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta);
639 return ret;
640}
641
642/*
643 * Send the add station command for the vif's broadcast station.
644 * Assumes that the station was already allocated.
645 *
646 * @mvm: the mvm component
647 * @vif: the interface to which the broadcast station is added
648 * @bsta: the broadcast station to add.
649 */
650int iwl_mvm_send_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
651 struct iwl_mvm_int_sta *bsta)
652{
653 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
5023d966
JB		 654 static const u8 _baddr[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
655 static const u8 *baddr = _baddr;
8ca151b5
JB		 656
657 lockdep_assert_held(&mvm->mutex);
658
5023d966
JB		 659 if (vif->type == NL80211_IFTYPE_ADHOC)
660 baddr = vif->bss_conf.bssid;
661
8ca151b5
JB		 662 if (WARN_ON_ONCE(bsta->sta_id == IWL_MVM_STATION_COUNT))
663 return -ENOSPC;
664
665 return iwl_mvm_add_int_sta_common(mvm, bsta, baddr,
666 mvmvif->id, mvmvif->color);
667}
668
669/* Send the FW a request to remove the station from it's internal data
670 * structures, but DO NOT remove the entry from the local data structures. */
671int iwl_mvm_send_rm_bcast_sta(struct iwl_mvm *mvm,
672 struct iwl_mvm_int_sta *bsta)
673{
674 int ret;
675
676 lockdep_assert_held(&mvm->mutex);
677
678 ret = iwl_mvm_rm_sta_common(mvm, bsta->sta_id);
679 if (ret)
680 IWL_WARN(mvm, "Failed sending remove station\n");
681 return ret;
682}
683
684/* Allocate a new station entry for the broadcast station to the given vif,
685 * and send it to the FW.
686 * Note that each P2P mac should have its own broadcast station.
687 *
688 * @mvm: the mvm component
689 * @vif: the interface to which the broadcast station is added
690 * @bsta: the broadcast station to add. */
691int iwl_mvm_add_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
692 struct iwl_mvm_int_sta *bsta)
693{
694 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
695 static const u8 baddr[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
696 u32 qmask;
697 int ret;
698
699 lockdep_assert_held(&mvm->mutex);
700
701 qmask = iwl_mvm_mac_get_queues_mask(mvm, vif);
702 ret = iwl_mvm_allocate_int_sta(mvm, bsta, qmask);
703 if (ret)
704 return ret;
705
706 ret = iwl_mvm_add_int_sta_common(mvm, bsta, baddr,
707 mvmvif->id, mvmvif->color);
708
709 if (ret)
710 iwl_mvm_dealloc_int_sta(mvm, bsta);
711 return ret;
712}
713
714/*
715 * Send the FW a request to remove the station from it's internal data
716 * structures, and in addition remove it from the local data structure.
717 */
718int iwl_mvm_rm_bcast_sta(struct iwl_mvm *mvm, struct iwl_mvm_int_sta *bsta)
719{
720 int ret;
721
722 lockdep_assert_held(&mvm->mutex);
723
724 ret = iwl_mvm_rm_sta_common(mvm, bsta->sta_id);
725 if (ret)
726 return ret;
727
728 iwl_mvm_dealloc_int_sta(mvm, bsta);
729 return ret;
730}
731
113a0447
EG		 732#define IWL_MAX_RX_BA_SESSIONS 16
733
8ca151b5
JB		 734int iwl_mvm_sta_rx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
735 int tid, u16 ssn, bool start)
736{
737 struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv;
5a258aae 738 struct iwl_mvm_add_sta_cmd_v6 cmd = {};
8ca151b5
JB		 739 int ret;
740 u32 status;
741
742 lockdep_assert_held(&mvm->mutex);
743
113a0447
EG		 744 if (start && mvm->rx_ba_sessions >= IWL_MAX_RX_BA_SESSIONS) {
745 IWL_WARN(mvm, "Not enough RX BA SESSIONS\n");
746 return -ENOSPC;
747 }
748
8ca151b5
JB		 749 cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color);
750 cmd.sta_id = mvm_sta->sta_id;
751 cmd.add_modify = STA_MODE_MODIFY;
93a42667
EG		 752 if (start) {
753 cmd.add_immediate_ba_tid = (u8) tid;
754 cmd.add_immediate_ba_ssn = cpu_to_le16(ssn);
755 } else {
756 cmd.remove_immediate_ba_tid = (u8) tid;
757 }
8ca151b5
JB		 758 cmd.modify_mask = start ? STA_MODIFY_ADD_BA_TID :
759 STA_MODIFY_REMOVE_BA_TID;
760
761 status = ADD_STA_SUCCESS;
5a258aae 762 ret = iwl_mvm_send_add_sta_cmd_status(mvm, &cmd, &status);
8ca151b5
JB		 763 if (ret)
764 return ret;
765
766 switch (status) {
767 case ADD_STA_SUCCESS:
768 IWL_DEBUG_INFO(mvm, "RX BA Session %sed in fw\n",
769 start ? "start" : "stopp");
770 break;
771 case ADD_STA_IMMEDIATE_BA_FAILURE:
772 IWL_WARN(mvm, "RX BA Session refused by fw\n");
773 ret = -ENOSPC;
774 break;
775 default:
776 ret = -EIO;
777 IWL_ERR(mvm, "RX BA Session failed %sing, status 0x%x\n",
778 start ? "start" : "stopp", status);
779 break;
780 }
781
113a0447
EG		 782 if (!ret) {
783 if (start)
784 mvm->rx_ba_sessions++;
785 else if (mvm->rx_ba_sessions > 0)
786 /* check that restart flow didn't zero the counter */
787 mvm->rx_ba_sessions--;
788 }
789
8ca151b5
JB		 790 return ret;
791}
792
793static int iwl_mvm_sta_tx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
794 int tid, u8 queue, bool start)
795{
796 struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv;
5a258aae 797 struct iwl_mvm_add_sta_cmd_v6 cmd = {};
8ca151b5
JB		 798 int ret;
799 u32 status;
800
801 lockdep_assert_held(&mvm->mutex);
802
803 if (start) {
804 mvm_sta->tfd_queue_msk |= BIT(queue);
805 mvm_sta->tid_disable_agg &= ~BIT(tid);
806 } else {
807 mvm_sta->tfd_queue_msk &= ~BIT(queue);
808 mvm_sta->tid_disable_agg |= BIT(tid);
809 }
810
811 cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color);
812 cmd.sta_id = mvm_sta->sta_id;
813 cmd.add_modify = STA_MODE_MODIFY;
814 cmd.modify_mask = STA_MODIFY_QUEUES | STA_MODIFY_TID_DISABLE_TX;
815 cmd.tfd_queue_msk = cpu_to_le32(mvm_sta->tfd_queue_msk);
816 cmd.tid_disable_tx = cpu_to_le16(mvm_sta->tid_disable_agg);
817
818 status = ADD_STA_SUCCESS;
5a258aae 819 ret = iwl_mvm_send_add_sta_cmd_status(mvm, &cmd, &status);
8ca151b5
JB		 820 if (ret)
821 return ret;
822
823 switch (status) {
824 case ADD_STA_SUCCESS:
825 break;
826 default:
827 ret = -EIO;
828 IWL_ERR(mvm, "TX BA Session failed %sing, status 0x%x\n",
829 start ? "start" : "stopp", status);
830 break;
831 }
832
833 return ret;
834}
835
836static const u8 tid_to_ac[] = {
837 IEEE80211_AC_BE,
838 IEEE80211_AC_BK,
839 IEEE80211_AC_BK,
840 IEEE80211_AC_BE,
841 IEEE80211_AC_VI,
842 IEEE80211_AC_VI,
843 IEEE80211_AC_VO,
844 IEEE80211_AC_VO,
845};
846
847int iwl_mvm_sta_tx_agg_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
848 struct ieee80211_sta *sta, u16 tid, u16 *ssn)
849{
5b577a90 850 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
8ca151b5
JB		 851 struct iwl_mvm_tid_data *tid_data;
852 int txq_id;
853
854 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
855 return -EINVAL;
856
857 if (mvmsta->tid_data[tid].state != IWL_AGG_OFF) {
858 IWL_ERR(mvm, "Start AGG when state is not IWL_AGG_OFF %d!\n",
859 mvmsta->tid_data[tid].state);
860 return -ENXIO;
861 }
862
863 lockdep_assert_held(&mvm->mutex);
864
19e737c9
EL		 865 for (txq_id = mvm->first_agg_queue;
866 txq_id <= mvm->last_agg_queue; txq_id++)
8ca151b5
JB		 867 if (mvm->queue_to_mac80211[txq_id] ==
868 IWL_INVALID_MAC80211_QUEUE)
869 break;
870
19e737c9 871 if (txq_id > mvm->last_agg_queue) {
8ca151b5
JB		 872 IWL_ERR(mvm, "Failed to allocate agg queue\n");
873 return -EIO;
874 }
875
876 /* the new tx queue is still connected to the same mac80211 queue */
877 mvm->queue_to_mac80211[txq_id] = vif->hw_queue[tid_to_ac[tid]];
878
879 spin_lock_bh(&mvmsta->lock);
880 tid_data = &mvmsta->tid_data[tid];
9a886586 881 tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
8ca151b5
JB		 882 tid_data->txq_id = txq_id;
883 *ssn = tid_data->ssn;
884
885 IWL_DEBUG_TX_QUEUES(mvm,
886 "Start AGG: sta %d tid %d queue %d - ssn = %d, next_recl = %d\n",
887 mvmsta->sta_id, tid, txq_id, tid_data->ssn,
888 tid_data->next_reclaimed);
889
890 if (tid_data->ssn == tid_data->next_reclaimed) {
891 tid_data->state = IWL_AGG_STARTING;
892 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
893 } else {
894 tid_data->state = IWL_EMPTYING_HW_QUEUE_ADDBA;
895 }
896
897 spin_unlock_bh(&mvmsta->lock);
898
899 return 0;
900}
901
902int iwl_mvm_sta_tx_agg_oper(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
903 struct ieee80211_sta *sta, u16 tid, u8 buf_size)
904{
5b577a90 905 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
8ca151b5
JB		 906 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
907 int queue, fifo, ret;
908 u16 ssn;
909
910 buf_size = min_t(int, buf_size, LINK_QUAL_AGG_FRAME_LIMIT_DEF);
911
912 spin_lock_bh(&mvmsta->lock);
913 ssn = tid_data->ssn;
914 queue = tid_data->txq_id;
915 tid_data->state = IWL_AGG_ON;
916 tid_data->ssn = 0xffff;
917 spin_unlock_bh(&mvmsta->lock);
918
919 fifo = iwl_mvm_ac_to_tx_fifo[tid_to_ac[tid]];
920
921 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true);
922 if (ret)
923 return -EIO;
924
925 iwl_trans_txq_enable(mvm->trans, queue, fifo, mvmsta->sta_id, tid,
926 buf_size, ssn);
927
928 /*
929 * Even though in theory the peer could have different
930 * aggregation reorder buffer sizes for different sessions,
931 * our ucode doesn't allow for that and has a global limit
932 * for each station. Therefore, use the minimum of all the
933 * aggregation sessions and our default value.
934 */
935 mvmsta->max_agg_bufsize =
936 min(mvmsta->max_agg_bufsize, buf_size);
937 mvmsta->lq_sta.lq.agg_frame_cnt_limit = mvmsta->max_agg_bufsize;
938
9ee718aa
EL		 939 IWL_DEBUG_HT(mvm, "Tx aggregation enabled on ra = %pM tid = %d\n",
940 sta->addr, tid);
941
8ca151b5
JB		 942 if (mvm->cfg->ht_params->use_rts_for_aggregation) {
943 /*
944 * switch to RTS/CTS if it is the prefer protection
945 * method for HT traffic
9ee718aa 946 * this function also sends the LQ command
8ca151b5 947 */
e126b5d9 948 return iwl_mvm_tx_protection(mvm, mvmsta, true);
8ca151b5
JB		 949 /*
950 * TODO: remove the TLC_RTS flag when we tear down the last
951 * AGG session (agg_tids_count in DVM)
952 */
953 }
954
9e680946 955 return iwl_mvm_send_lq_cmd(mvm, &mvmsta->lq_sta.lq, false);
8ca151b5
JB		 956}
957
958int iwl_mvm_sta_tx_agg_stop(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
959 struct ieee80211_sta *sta, u16 tid)
960{
5b577a90 961 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
8ca151b5
JB		 962 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
963 u16 txq_id;
964 int err;
965
f9aa8dd3
EG		 966
967 /*
968 * If mac80211 is cleaning its state, then say that we finished since
969 * our state has been cleared anyway.
970 */
971 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
972 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
973 return 0;
974 }
975
8ca151b5
JB		 976 spin_lock_bh(&mvmsta->lock);
977
978 txq_id = tid_data->txq_id;
979
980 IWL_DEBUG_TX_QUEUES(mvm, "Stop AGG: sta %d tid %d q %d state %d\n",
981 mvmsta->sta_id, tid, txq_id, tid_data->state);
982
983 switch (tid_data->state) {
984 case IWL_AGG_ON:
9a886586 985 tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
8ca151b5
JB		 986
987 IWL_DEBUG_TX_QUEUES(mvm,
988 "ssn = %d, next_recl = %d\n",
989 tid_data->ssn, tid_data->next_reclaimed);
990
991 /* There are still packets for this RA / TID in the HW */
992 if (tid_data->ssn != tid_data->next_reclaimed) {
993 tid_data->state = IWL_EMPTYING_HW_QUEUE_DELBA;
994 err = 0;
995 break;
996 }
997
998 tid_data->ssn = 0xffff;
999 iwl_trans_txq_disable(mvm->trans, txq_id);
1000 /* fall through */
1001 case IWL_AGG_STARTING:
1002 case IWL_EMPTYING_HW_QUEUE_ADDBA:
1003 /*
1004 * The agg session has been stopped before it was set up. This
1005 * can happen when the AddBA timer times out for example.
1006 */
1007
1008 /* No barriers since we are under mutex */
1009 lockdep_assert_held(&mvm->mutex);
1010 mvm->queue_to_mac80211[txq_id] = IWL_INVALID_MAC80211_QUEUE;
1011
1012 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1013 tid_data->state = IWL_AGG_OFF;
1014 err = 0;
1015 break;
1016 default:
1017 IWL_ERR(mvm,
1018 "Stopping AGG while state not ON or starting for %d on %d (%d)\n",
1019 mvmsta->sta_id, tid, tid_data->state);
1020 IWL_ERR(mvm,
1021 "\ttid_data->txq_id = %d\n", tid_data->txq_id);
1022 err = -EINVAL;
1023 }
1024
1025 spin_unlock_bh(&mvmsta->lock);
1026
1027 return err;
1028}
1029
e3d9e7ce
EG		 1030int iwl_mvm_sta_tx_agg_flush(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1031 struct ieee80211_sta *sta, u16 tid)
1032{
5b577a90 1033 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
e3d9e7ce
EG		 1034 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
1035 u16 txq_id;
b6658ff8 1036 enum iwl_mvm_agg_state old_state;
e3d9e7ce
EG		 1037
1038 /*
1039 * First set the agg state to OFF to avoid calling
1040 * ieee80211_stop_tx_ba_cb in iwl_mvm_check_ratid_empty.
1041 */
1042 spin_lock_bh(&mvmsta->lock);
1043 txq_id = tid_data->txq_id;
1044 IWL_DEBUG_TX_QUEUES(mvm, "Flush AGG: sta %d tid %d q %d state %d\n",
1045 mvmsta->sta_id, tid, txq_id, tid_data->state);
b6658ff8 1046 old_state = tid_data->state;
e3d9e7ce
EG		 1047 tid_data->state = IWL_AGG_OFF;
1048 spin_unlock_bh(&mvmsta->lock);
1049
b6658ff8
JB		 1050 if (old_state >= IWL_AGG_ON) {
1051 if (iwl_mvm_flush_tx_path(mvm, BIT(txq_id), true))
1052 IWL_ERR(mvm, "Couldn't flush the AGG queue\n");
1053
1054 iwl_trans_txq_disable(mvm->trans, tid_data->txq_id);
1055 }
e3d9e7ce 1056
e3d9e7ce
EG		 1057 mvm->queue_to_mac80211[tid_data->txq_id] =
1058 IWL_INVALID_MAC80211_QUEUE;
1059
1060 return 0;
1061}
1062
8ca151b5
JB		 1063static int iwl_mvm_set_fw_key_idx(struct iwl_mvm *mvm)
1064{
1065 int i;
1066
1067 lockdep_assert_held(&mvm->mutex);
1068
1069 i = find_first_zero_bit(mvm->fw_key_table, STA_KEY_MAX_NUM);
1070
1071 if (i == STA_KEY_MAX_NUM)
1072 return STA_KEY_IDX_INVALID;
1073
1074 __set_bit(i, mvm->fw_key_table);
1075
1076 return i;
1077}
1078
1079static u8 iwl_mvm_get_key_sta_id(struct ieee80211_vif *vif,
1080 struct ieee80211_sta *sta)
1081{
1082 struct iwl_mvm_vif *mvmvif = (void *)vif->drv_priv;
1083
1084 if (sta) {
1085 struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv;
1086
1087 return mvm_sta->sta_id;
1088 }
1089
1090 /*
1091 * The device expects GTKs for station interfaces to be
1092 * installed as GTKs for the AP station. If we have no
1093 * station ID, then use AP's station ID.
1094 */
1095 if (vif->type == NL80211_IFTYPE_STATION &&
1096 mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT)
1097 return mvmvif->ap_sta_id;
1098
881acd89 1099 return IWL_MVM_STATION_COUNT;
8ca151b5
JB		 1100}
1101
1102static int iwl_mvm_send_sta_key(struct iwl_mvm *mvm,
1103 struct iwl_mvm_sta *mvm_sta,
1104 struct ieee80211_key_conf *keyconf,
1105 u8 sta_id, u32 tkip_iv32, u16 *tkip_p1k,
1106 u32 cmd_flags)
1107{
1108 __le16 key_flags;
5a258aae 1109 struct iwl_mvm_add_sta_key_cmd cmd = {};
8ca151b5
JB		 1110 int ret, status;
1111 u16 keyidx;
1112 int i;
5a258aae 1113 u32 mac_id_n_color = mvm_sta->mac_id_n_color;
8ca151b5
JB		 1114
1115 keyidx = (keyconf->keyidx << STA_KEY_FLG_KEYID_POS) &
1116 STA_KEY_FLG_KEYID_MSK;
1117 key_flags = cpu_to_le16(keyidx);
1118 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_KEY_MAP);
1119
1120 switch (keyconf->cipher) {
1121 case WLAN_CIPHER_SUITE_TKIP:
1122 key_flags |= cpu_to_le16(STA_KEY_FLG_TKIP);
5a258aae 1123 cmd.tkip_rx_tsc_byte2 = tkip_iv32;
8ca151b5 1124 for (i = 0; i < 5; i++)
5a258aae
MS		 1125 cmd.tkip_rx_ttak[i] = cpu_to_le16(tkip_p1k[i]);
1126 memcpy(cmd.key, keyconf->key, keyconf->keylen);
8ca151b5
JB		 1127 break;
1128 case WLAN_CIPHER_SUITE_CCMP:
1129 key_flags |= cpu_to_le16(STA_KEY_FLG_CCM);
5a258aae 1130 memcpy(cmd.key, keyconf->key, keyconf->keylen);
8ca151b5
JB		 1131 break;
1132 default:
1133 WARN_ON(1);
1134 return -EINVAL;
1135 }
1136
1137 if (!(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE))
1138 key_flags |= cpu_to_le16(STA_KEY_MULTICAST);
1139
5a258aae
MS		 1140 cmd.key_offset = keyconf->hw_key_idx;
1141 cmd.key_flags = key_flags;
8ca151b5
JB		 1142 cmd.sta_id = sta_id;
1143
1144 status = ADD_STA_SUCCESS;
1145 if (cmd_flags == CMD_SYNC)
5a258aae
MS		 1146 ret = iwl_mvm_send_add_sta_key_cmd_status(mvm, &cmd,
1147 mac_id_n_color,
1148 &status);
8ca151b5 1149 else
5a258aae
MS		 1150 ret = iwl_mvm_send_add_sta_key_cmd(mvm, CMD_ASYNC, &cmd,
1151 mac_id_n_color);
8ca151b5
JB		 1152
1153 switch (status) {
1154 case ADD_STA_SUCCESS:
1155 IWL_DEBUG_WEP(mvm, "MODIFY_STA: set dynamic key passed\n");
1156 break;
1157 default:
1158 ret = -EIO;
1159 IWL_ERR(mvm, "MODIFY_STA: set dynamic key failed\n");
1160 break;
1161 }
1162
1163 return ret;
1164}
1165
1166static int iwl_mvm_send_sta_igtk(struct iwl_mvm *mvm,
1167 struct ieee80211_key_conf *keyconf,
1168 u8 sta_id, bool remove_key)
1169{
1170 struct iwl_mvm_mgmt_mcast_key_cmd igtk_cmd = {};
1171
1172 /* verify the key details match the required command's expectations */
1173 if (WARN_ON((keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC) ||
1174 (keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE) ||
1175 (keyconf->keyidx != 4 && keyconf->keyidx != 5)))
1176 return -EINVAL;
1177
1178 igtk_cmd.key_id = cpu_to_le32(keyconf->keyidx);
1179 igtk_cmd.sta_id = cpu_to_le32(sta_id);
1180
1181 if (remove_key) {
1182 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_NOT_VALID);
1183 } else {
1184 struct ieee80211_key_seq seq;
1185 const u8 *pn;
1186
1187 memcpy(igtk_cmd.IGTK, keyconf->key, keyconf->keylen);
1188 ieee80211_aes_cmac_calculate_k1_k2(keyconf,
1189 igtk_cmd.K1, igtk_cmd.K2);
1190 ieee80211_get_key_rx_seq(keyconf, 0, &seq);
1191 pn = seq.aes_cmac.pn;
1192 igtk_cmd.receive_seq_cnt = cpu_to_le64(((u64) pn[5] << 0) |
1193 ((u64) pn[4] << 8) |
1194 ((u64) pn[3] << 16) |
1195 ((u64) pn[2] << 24) |
1196 ((u64) pn[1] << 32) |
1197 ((u64) pn[0] << 40));
1198 }
1199
1200 IWL_DEBUG_INFO(mvm, "%s igtk for sta %u\n",
1201 remove_key ? "removing" : "installing",
1202 igtk_cmd.sta_id);
1203
1204 return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, CMD_SYNC,
1205 sizeof(igtk_cmd), &igtk_cmd);
1206}
1207
1208
1209static inline u8 *iwl_mvm_get_mac_addr(struct iwl_mvm *mvm,
1210 struct ieee80211_vif *vif,
1211 struct ieee80211_sta *sta)
1212{
1213 struct iwl_mvm_vif *mvmvif = (void *)vif->drv_priv;
1214
1215 if (sta)
1216 return sta->addr;
1217
1218 if (vif->type == NL80211_IFTYPE_STATION &&
1219 mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT) {
1220 u8 sta_id = mvmvif->ap_sta_id;
1221 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
1222 lockdep_is_held(&mvm->mutex));
1223 return sta->addr;
1224 }
1225
1226
1227 return NULL;
1228}
1229
1230int iwl_mvm_set_sta_key(struct iwl_mvm *mvm,
1231 struct ieee80211_vif *vif,
1232 struct ieee80211_sta *sta,
1233 struct ieee80211_key_conf *keyconf,
1234 bool have_key_offset)
1235{
1236 struct iwl_mvm_sta *mvm_sta;
1237 int ret;
1238 u8 *addr, sta_id;
1239 struct ieee80211_key_seq seq;
1240 u16 p1k[5];
1241
1242 lockdep_assert_held(&mvm->mutex);
1243
1244 /* Get the station id from the mvm local station table */
1245 sta_id = iwl_mvm_get_key_sta_id(vif, sta);
881acd89 1246 if (sta_id == IWL_MVM_STATION_COUNT) {
8ca151b5
JB		 1247 IWL_ERR(mvm, "Failed to find station id\n");
1248 return -EINVAL;
1249 }
1250
1251 if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC) {
1252 ret = iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, false);
1253 goto end;
1254 }
1255
1256 /*
1257 * It is possible that the 'sta' parameter is NULL, and thus
1258 * there is a need to retrieve the sta from the local station table.
1259 */
1260 if (!sta) {
1261 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
1262 lockdep_is_held(&mvm->mutex));
1263 if (IS_ERR_OR_NULL(sta)) {
1264 IWL_ERR(mvm, "Invalid station id\n");
1265 return -EINVAL;
1266 }
1267 }
1268
1269 mvm_sta = (struct iwl_mvm_sta *)sta->drv_priv;
1270 if (WARN_ON_ONCE(mvm_sta->vif != vif))
1271 return -EINVAL;
1272
1273 if (!have_key_offset) {
1274 /*
1275 * The D3 firmware hardcodes the PTK offset to 0, so we have to
1276 * configure it there. As a result, this workaround exists to
1277 * let the caller set the key offset (hw_key_idx), see d3.c.
1278 */
1279 keyconf->hw_key_idx = iwl_mvm_set_fw_key_idx(mvm);
1280 if (keyconf->hw_key_idx == STA_KEY_IDX_INVALID)
1281 return -ENOSPC;
1282 }
1283
1284 switch (keyconf->cipher) {
1285 case WLAN_CIPHER_SUITE_TKIP:
1286 addr = iwl_mvm_get_mac_addr(mvm, vif, sta);
1287 /* get phase 1 key from mac80211 */
1288 ieee80211_get_key_rx_seq(keyconf, 0, &seq);
1289 ieee80211_get_tkip_rx_p1k(keyconf, addr, seq.tkip.iv32, p1k);
1290 ret = iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, sta_id,
1291 seq.tkip.iv32, p1k, CMD_SYNC);
1292 break;
1293 case WLAN_CIPHER_SUITE_CCMP:
1294 ret = iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, sta_id,
1295 0, NULL, CMD_SYNC);
1296 break;
1297 default:
1298 IWL_ERR(mvm, "Unknown cipher %x\n", keyconf->cipher);
1299 ret = -EINVAL;
1300 }
1301
1302 if (ret)
1303 __clear_bit(keyconf->hw_key_idx, mvm->fw_key_table);
1304
1305end:
1306 IWL_DEBUG_WEP(mvm, "key: cipher=%x len=%d idx=%d sta=%pM ret=%d\n",
1307 keyconf->cipher, keyconf->keylen, keyconf->keyidx,
1308 sta->addr, ret);
1309 return ret;
1310}
1311
1312int iwl_mvm_remove_sta_key(struct iwl_mvm *mvm,
1313 struct ieee80211_vif *vif,
1314 struct ieee80211_sta *sta,
1315 struct ieee80211_key_conf *keyconf)
1316{
1317 struct iwl_mvm_sta *mvm_sta;
5a258aae 1318 struct iwl_mvm_add_sta_key_cmd cmd = {};
8ca151b5
JB		 1319 __le16 key_flags;
1320 int ret, status;
1321 u8 sta_id;
1322
1323 lockdep_assert_held(&mvm->mutex);
1324
1325 /* Get the station id from the mvm local station table */
1326 sta_id = iwl_mvm_get_key_sta_id(vif, sta);
1327
1328 IWL_DEBUG_WEP(mvm, "mvm remove dynamic key: idx=%d sta=%d\n",
1329 keyconf->keyidx, sta_id);
1330
1331 if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC)
1332 return iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, true);
1333
1334 ret = __test_and_clear_bit(keyconf->hw_key_idx, mvm->fw_key_table);
1335 if (!ret) {
1336 IWL_ERR(mvm, "offset %d not used in fw key table.\n",
1337 keyconf->hw_key_idx);
1338 return -ENOENT;
1339 }
1340
881acd89 1341 if (sta_id == IWL_MVM_STATION_COUNT) {
8ca151b5
JB		 1342 IWL_DEBUG_WEP(mvm, "station non-existent, early return.\n");
1343 return 0;
1344 }
1345
1346 /*
1347 * It is possible that the 'sta' parameter is NULL, and thus
1348 * there is a need to retrieve the sta from the local station table,
1349 * for example when a GTK is removed (where the sta_id will then be
1350 * the AP ID, and no station was passed by mac80211.)
1351 */
1352 if (!sta) {
1353 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
1354 lockdep_is_held(&mvm->mutex));
1355 if (!sta) {
1356 IWL_ERR(mvm, "Invalid station id\n");
1357 return -EINVAL;
1358 }
1359 }
1360
1361 mvm_sta = (struct iwl_mvm_sta *)sta->drv_priv;
1362 if (WARN_ON_ONCE(mvm_sta->vif != vif))
1363 return -EINVAL;
1364
8115efbd
EG		 1365 key_flags = cpu_to_le16((keyconf->keyidx << STA_KEY_FLG_KEYID_POS) &
1366 STA_KEY_FLG_KEYID_MSK);
8ca151b5
JB		 1367 key_flags |= cpu_to_le16(STA_KEY_FLG_NO_ENC | STA_KEY_FLG_WEP_KEY_MAP);
1368 key_flags |= cpu_to_le16(STA_KEY_NOT_VALID);
1369
1370 if (!(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE))
1371 key_flags |= cpu_to_le16(STA_KEY_MULTICAST);
1372
5a258aae
MS		 1373 cmd.key_flags = key_flags;
1374 cmd.key_offset = keyconf->hw_key_idx;
8ca151b5
JB		 1375 cmd.sta_id = sta_id;
1376
8ca151b5 1377 status = ADD_STA_SUCCESS;
5a258aae
MS		 1378 ret = iwl_mvm_send_add_sta_key_cmd_status(mvm, &cmd,
1379 mvm_sta->mac_id_n_color,
1380 &status);
8ca151b5
JB		 1381
1382 switch (status) {
1383 case ADD_STA_SUCCESS:
1384 IWL_DEBUG_WEP(mvm, "MODIFY_STA: remove sta key passed\n");
1385 break;
1386 default:
1387 ret = -EIO;
1388 IWL_ERR(mvm, "MODIFY_STA: remove sta key failed\n");
1389 break;
1390 }
1391
1392 return ret;
1393}
1394
1395void iwl_mvm_update_tkip_key(struct iwl_mvm *mvm,
1396 struct ieee80211_vif *vif,
1397 struct ieee80211_key_conf *keyconf,
1398 struct ieee80211_sta *sta, u32 iv32,
1399 u16 *phase1key)
1400{
c3eb536a 1401 struct iwl_mvm_sta *mvm_sta;
8ca151b5
JB		 1402 u8 sta_id = iwl_mvm_get_key_sta_id(vif, sta);
1403
881acd89 1404 if (WARN_ON_ONCE(sta_id == IWL_MVM_STATION_COUNT))
8ca151b5
JB		 1405 return;
1406
c3eb536a
BL		 1407 rcu_read_lock();
1408
1409 if (!sta) {
1410 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
1411 if (WARN_ON(IS_ERR_OR_NULL(sta))) {
1412 rcu_read_unlock();
1413 return;
1414 }
1415 }
1416
1417 mvm_sta = (void *)sta->drv_priv;
8ca151b5
JB		 1418 iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, sta_id,
1419 iv32, phase1key, CMD_ASYNC);
c3eb536a 1420 rcu_read_unlock();
8ca151b5
JB		 1421}
1422
9cc40712
JB		 1423void iwl_mvm_sta_modify_ps_wake(struct iwl_mvm *mvm,
1424 struct ieee80211_sta *sta)
8ca151b5 1425{
5b577a90 1426 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
5a258aae 1427 struct iwl_mvm_add_sta_cmd_v6 cmd = {
8ca151b5 1428 .add_modify = STA_MODE_MODIFY,
9cc40712 1429 .sta_id = mvmsta->sta_id,
5af01772 1430 .station_flags_msk = cpu_to_le32(STA_FLG_PS),
9cc40712 1431 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
8ca151b5
JB		 1432 };
1433 int ret;
1434
5a258aae 1435 ret = iwl_mvm_send_add_sta_cmd(mvm, CMD_ASYNC, &cmd);
8ca151b5
JB		 1436 if (ret)
1437 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
1438}
1439
9cc40712
JB		 1440void iwl_mvm_sta_modify_sleep_tx_count(struct iwl_mvm *mvm,
1441 struct ieee80211_sta *sta,
8ca151b5
JB		 1442 enum ieee80211_frame_release_type reason,
1443 u16 cnt)
1444{
1445 u16 sleep_state_flags =
1446 (reason == IEEE80211_FRAME_RELEASE_UAPSD) ?
1447 STA_SLEEP_STATE_UAPSD : STA_SLEEP_STATE_PS_POLL;
5b577a90 1448 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
5a258aae 1449 struct iwl_mvm_add_sta_cmd_v6 cmd = {
8ca151b5 1450 .add_modify = STA_MODE_MODIFY,
9cc40712 1451 .sta_id = mvmsta->sta_id,
8ca151b5
JB		 1452 .modify_mask = STA_MODIFY_SLEEPING_STA_TX_COUNT,
1453 .sleep_tx_count = cpu_to_le16(cnt),
9cc40712 1454 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
8ca151b5
JB		 1455 /*
1456 * Same modify mask for sleep_tx_count and sleep_state_flags so
1457 * we must set the sleep_state_flags too.
1458 */
1459 .sleep_state_flags = cpu_to_le16(sleep_state_flags),
1460 };
1461 int ret;
1462
1463 /* TODO: somehow the fw doesn't seem to take PS_POLL into account */
5a258aae 1464 ret = iwl_mvm_send_add_sta_cmd(mvm, CMD_ASYNC, &cmd);
8ca151b5
JB		 1465 if (ret)
1466 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
1467}
Linux 6.x block layer and io_uring tree(s)