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iwlwifi: mvm: add a generic cipher scheme support
[deliverable/linux.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
455 /* This station is in use */
456 if (!IS_ERR(sta))
457 continue;
458
459 if (PTR_ERR(sta) == -EINVAL) {
460 IWL_ERR(mvm, "Drained sta %d, but it is internal?\n",
461 sta_id);
462 continue;
463 }
464
465 if (!sta) {
466 IWL_ERR(mvm, "Drained sta %d, but it was NULL?\n",
467 sta_id);
468 continue;
469 }
470
471 WARN_ON(PTR_ERR(sta) != -EBUSY);
472 /* This station was removed and we waited until it got drained,
473 * we can now proceed and remove it.
474 */
475 ret = iwl_mvm_rm_sta_common(mvm, sta_id);
476 if (ret) {
477 IWL_ERR(mvm,
478 "Couldn't remove sta %d after it was drained\n",
479 sta_id);
480 continue;
481 }
482 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta_id], NULL);
483 clear_bit(sta_id, mvm->sta_drained);
484 }
485
486 mutex_unlock(&mvm->mutex);
487}
488
489int iwl_mvm_rm_sta(struct iwl_mvm *mvm,
490 struct ieee80211_vif *vif,
491 struct ieee80211_sta *sta)
492{
493 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
494 struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv;
495 int ret;
496
497 lockdep_assert_held(&mvm->mutex);
498
499 if (vif->type == NL80211_IFTYPE_STATION &&
500 mvmvif->ap_sta_id == mvm_sta->sta_id) {
80d85655
EG		 501 /* flush its queues here since we are freeing mvm_sta */
502 ret = iwl_mvm_flush_tx_path(mvm, mvm_sta->tfd_queue_msk, true);
503
8ca151b5
JB		 504 /*
505 * Put a non-NULL since the fw station isn't removed.
506 * It will be removed after the MAC will be set as
507 * unassoc.
508 */
509 rcu_assign_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id],
510 ERR_PTR(-EINVAL));
511
8ca151b5
JB		 512 /* if we are associated - we can't remove the AP STA now */
513 if (vif->bss_conf.assoc)
514 return ret;
515
516 /* unassoc - go ahead - remove the AP STA now */
517 mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
518 }
519
e3d4bc8c
EG		 520 /*
521 * Make sure that the tx response code sees the station as -EBUSY and
522 * calls the drain worker.
523 */
524 spin_lock_bh(&mvm_sta->lock);
8ca151b5
JB		 525 /*
526 * There are frames pending on the AC queues for this station.
527 * We need to wait until all the frames are drained...
528 */
e3d4bc8c 529 if (atomic_read(&mvm->pending_frames[mvm_sta->sta_id])) {
8ca151b5
JB		 530 rcu_assign_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id],
531 ERR_PTR(-EBUSY));
e3d4bc8c
EG		 532 spin_unlock_bh(&mvm_sta->lock);
533 ret = iwl_mvm_drain_sta(mvm, mvm_sta, true);
8ca151b5 534 } else {
e3d4bc8c 535 spin_unlock_bh(&mvm_sta->lock);
8ca151b5
JB		 536 ret = iwl_mvm_rm_sta_common(mvm, mvm_sta->sta_id);
537 rcu_assign_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id], NULL);
538 }
539
540 return ret;
541}
542
543int iwl_mvm_rm_sta_id(struct iwl_mvm *mvm,
544 struct ieee80211_vif *vif,
545 u8 sta_id)
546{
547 int ret = iwl_mvm_rm_sta_common(mvm, sta_id);
548
549 lockdep_assert_held(&mvm->mutex);
550
551 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta_id], NULL);
552 return ret;
553}
554
555int iwl_mvm_allocate_int_sta(struct iwl_mvm *mvm, struct iwl_mvm_int_sta *sta,
556 u32 qmask)
557{
558 if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
559 sta->sta_id = iwl_mvm_find_free_sta_id(mvm);
560 if (WARN_ON_ONCE(sta->sta_id == IWL_MVM_STATION_COUNT))
561 return -ENOSPC;
562 }
563
564 sta->tfd_queue_msk = qmask;
565
566 /* put a non-NULL value so iterating over the stations won't stop */
567 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta->sta_id], ERR_PTR(-EINVAL));
568 return 0;
569}
570
571void iwl_mvm_dealloc_int_sta(struct iwl_mvm *mvm, struct iwl_mvm_int_sta *sta)
572{
573 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta->sta_id], NULL);
574 memset(sta, 0, sizeof(struct iwl_mvm_int_sta));
575 sta->sta_id = IWL_MVM_STATION_COUNT;
576}
577
578static int iwl_mvm_add_int_sta_common(struct iwl_mvm *mvm,
579 struct iwl_mvm_int_sta *sta,
580 const u8 *addr,
581 u16 mac_id, u16 color)
582{
5a258aae 583 struct iwl_mvm_add_sta_cmd_v6 cmd;
8ca151b5
JB		 584 int ret;
585 u32 status;
586
587 lockdep_assert_held(&mvm->mutex);
588
5a258aae 589 memset(&cmd, 0, sizeof(struct iwl_mvm_add_sta_cmd_v6));
8ca151b5
JB		 590 cmd.sta_id = sta->sta_id;
591 cmd.mac_id_n_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(mac_id,
592 color));
593
594 cmd.tfd_queue_msk = cpu_to_le32(sta->tfd_queue_msk);
595
596 if (addr)
597 memcpy(cmd.addr, addr, ETH_ALEN);
598
5a258aae 599 ret = iwl_mvm_send_add_sta_cmd_status(mvm, &cmd, &status);
8ca151b5
JB		 600 if (ret)
601 return ret;
602
603 switch (status) {
604 case ADD_STA_SUCCESS:
605 IWL_DEBUG_INFO(mvm, "Internal station added.\n");
606 return 0;
607 default:
608 ret = -EIO;
609 IWL_ERR(mvm, "Add internal station failed, status=0x%x\n",
610 status);
611 break;
612 }
613 return ret;
614}
615
616int iwl_mvm_add_aux_sta(struct iwl_mvm *mvm)
617{
618 int ret;
619
620 lockdep_assert_held(&mvm->mutex);
621
622 /* Add the aux station, but without any queues */
623 ret = iwl_mvm_allocate_int_sta(mvm, &mvm->aux_sta, 0);
624 if (ret)
625 return ret;
626
627 ret = iwl_mvm_add_int_sta_common(mvm, &mvm->aux_sta, NULL,
628 MAC_INDEX_AUX, 0);
629
630 if (ret)
631 iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta);
632 return ret;
633}
634
635/*
636 * Send the add station command for the vif's broadcast station.
637 * Assumes that the station was already allocated.
638 *
639 * @mvm: the mvm component
640 * @vif: the interface to which the broadcast station is added
641 * @bsta: the broadcast station to add.
642 */
643int iwl_mvm_send_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
644 struct iwl_mvm_int_sta *bsta)
645{
646 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
5023d966
JB		 647 static const u8 _baddr[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
648 static const u8 *baddr = _baddr;
8ca151b5
JB		 649
650 lockdep_assert_held(&mvm->mutex);
651
5023d966
JB		 652 if (vif->type == NL80211_IFTYPE_ADHOC)
653 baddr = vif->bss_conf.bssid;
654
8ca151b5
JB		 655 if (WARN_ON_ONCE(bsta->sta_id == IWL_MVM_STATION_COUNT))
656 return -ENOSPC;
657
658 return iwl_mvm_add_int_sta_common(mvm, bsta, baddr,
659 mvmvif->id, mvmvif->color);
660}
661
662/* Send the FW a request to remove the station from it's internal data
663 * structures, but DO NOT remove the entry from the local data structures. */
664int iwl_mvm_send_rm_bcast_sta(struct iwl_mvm *mvm,
665 struct iwl_mvm_int_sta *bsta)
666{
667 int ret;
668
669 lockdep_assert_held(&mvm->mutex);
670
671 ret = iwl_mvm_rm_sta_common(mvm, bsta->sta_id);
672 if (ret)
673 IWL_WARN(mvm, "Failed sending remove station\n");
674 return ret;
675}
676
677/* Allocate a new station entry for the broadcast station to the given vif,
678 * and send it to the FW.
679 * Note that each P2P mac should have its own broadcast station.
680 *
681 * @mvm: the mvm component
682 * @vif: the interface to which the broadcast station is added
683 * @bsta: the broadcast station to add. */
684int iwl_mvm_add_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
685 struct iwl_mvm_int_sta *bsta)
686{
687 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
688 static const u8 baddr[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
689 u32 qmask;
690 int ret;
691
692 lockdep_assert_held(&mvm->mutex);
693
694 qmask = iwl_mvm_mac_get_queues_mask(mvm, vif);
695 ret = iwl_mvm_allocate_int_sta(mvm, bsta, qmask);
696 if (ret)
697 return ret;
698
699 ret = iwl_mvm_add_int_sta_common(mvm, bsta, baddr,
700 mvmvif->id, mvmvif->color);
701
702 if (ret)
703 iwl_mvm_dealloc_int_sta(mvm, bsta);
704 return ret;
705}
706
707/*
708 * Send the FW a request to remove the station from it's internal data
709 * structures, and in addition remove it from the local data structure.
710 */
711int iwl_mvm_rm_bcast_sta(struct iwl_mvm *mvm, struct iwl_mvm_int_sta *bsta)
712{
713 int ret;
714
715 lockdep_assert_held(&mvm->mutex);
716
717 ret = iwl_mvm_rm_sta_common(mvm, bsta->sta_id);
718 if (ret)
719 return ret;
720
721 iwl_mvm_dealloc_int_sta(mvm, bsta);
722 return ret;
723}
724
113a0447
EG		 725#define IWL_MAX_RX_BA_SESSIONS 16
726
8ca151b5
JB		 727int iwl_mvm_sta_rx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
728 int tid, u16 ssn, bool start)
729{
730 struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv;
5a258aae 731 struct iwl_mvm_add_sta_cmd_v6 cmd = {};
8ca151b5
JB		 732 int ret;
733 u32 status;
734
735 lockdep_assert_held(&mvm->mutex);
736
113a0447
EG		 737 if (start && mvm->rx_ba_sessions >= IWL_MAX_RX_BA_SESSIONS) {
738 IWL_WARN(mvm, "Not enough RX BA SESSIONS\n");
739 return -ENOSPC;
740 }
741
8ca151b5
JB		 742 cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color);
743 cmd.sta_id = mvm_sta->sta_id;
744 cmd.add_modify = STA_MODE_MODIFY;
93a42667
EG		 745 if (start) {
746 cmd.add_immediate_ba_tid = (u8) tid;
747 cmd.add_immediate_ba_ssn = cpu_to_le16(ssn);
748 } else {
749 cmd.remove_immediate_ba_tid = (u8) tid;
750 }
8ca151b5
JB		 751 cmd.modify_mask = start ? STA_MODIFY_ADD_BA_TID :
752 STA_MODIFY_REMOVE_BA_TID;
753
754 status = ADD_STA_SUCCESS;
5a258aae 755 ret = iwl_mvm_send_add_sta_cmd_status(mvm, &cmd, &status);
8ca151b5
JB		 756 if (ret)
757 return ret;
758
759 switch (status) {
760 case ADD_STA_SUCCESS:
761 IWL_DEBUG_INFO(mvm, "RX BA Session %sed in fw\n",
762 start ? "start" : "stopp");
763 break;
764 case ADD_STA_IMMEDIATE_BA_FAILURE:
765 IWL_WARN(mvm, "RX BA Session refused by fw\n");
766 ret = -ENOSPC;
767 break;
768 default:
769 ret = -EIO;
770 IWL_ERR(mvm, "RX BA Session failed %sing, status 0x%x\n",
771 start ? "start" : "stopp", status);
772 break;
773 }
774
113a0447
EG		 775 if (!ret) {
776 if (start)
777 mvm->rx_ba_sessions++;
778 else if (mvm->rx_ba_sessions > 0)
779 /* check that restart flow didn't zero the counter */
780 mvm->rx_ba_sessions--;
781 }
782
8ca151b5
JB		 783 return ret;
784}
785
786static int iwl_mvm_sta_tx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
787 int tid, u8 queue, bool start)
788{
789 struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv;
5a258aae 790 struct iwl_mvm_add_sta_cmd_v6 cmd = {};
8ca151b5
JB		 791 int ret;
792 u32 status;
793
794 lockdep_assert_held(&mvm->mutex);
795
796 if (start) {
797 mvm_sta->tfd_queue_msk |= BIT(queue);
798 mvm_sta->tid_disable_agg &= ~BIT(tid);
799 } else {
800 mvm_sta->tfd_queue_msk &= ~BIT(queue);
801 mvm_sta->tid_disable_agg |= BIT(tid);
802 }
803
804 cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color);
805 cmd.sta_id = mvm_sta->sta_id;
806 cmd.add_modify = STA_MODE_MODIFY;
807 cmd.modify_mask = STA_MODIFY_QUEUES | STA_MODIFY_TID_DISABLE_TX;
808 cmd.tfd_queue_msk = cpu_to_le32(mvm_sta->tfd_queue_msk);
809 cmd.tid_disable_tx = cpu_to_le16(mvm_sta->tid_disable_agg);
810
811 status = ADD_STA_SUCCESS;
5a258aae 812 ret = iwl_mvm_send_add_sta_cmd_status(mvm, &cmd, &status);
8ca151b5
JB		 813 if (ret)
814 return ret;
815
816 switch (status) {
817 case ADD_STA_SUCCESS:
818 break;
819 default:
820 ret = -EIO;
821 IWL_ERR(mvm, "TX BA Session failed %sing, status 0x%x\n",
822 start ? "start" : "stopp", status);
823 break;
824 }
825
826 return ret;
827}
828
829static const u8 tid_to_ac[] = {
830 IEEE80211_AC_BE,
831 IEEE80211_AC_BK,
832 IEEE80211_AC_BK,
833 IEEE80211_AC_BE,
834 IEEE80211_AC_VI,
835 IEEE80211_AC_VI,
836 IEEE80211_AC_VO,
837 IEEE80211_AC_VO,
838};
839
840int iwl_mvm_sta_tx_agg_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
841 struct ieee80211_sta *sta, u16 tid, u16 *ssn)
842{
5b577a90 843 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
8ca151b5
JB		 844 struct iwl_mvm_tid_data *tid_data;
845 int txq_id;
846
847 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
848 return -EINVAL;
849
850 if (mvmsta->tid_data[tid].state != IWL_AGG_OFF) {
851 IWL_ERR(mvm, "Start AGG when state is not IWL_AGG_OFF %d!\n",
852 mvmsta->tid_data[tid].state);
853 return -ENXIO;
854 }
855
856 lockdep_assert_held(&mvm->mutex);
857
19e737c9
EL		 858 for (txq_id = mvm->first_agg_queue;
859 txq_id <= mvm->last_agg_queue; txq_id++)
8ca151b5
JB		 860 if (mvm->queue_to_mac80211[txq_id] ==
861 IWL_INVALID_MAC80211_QUEUE)
862 break;
863
19e737c9 864 if (txq_id > mvm->last_agg_queue) {
8ca151b5
JB		 865 IWL_ERR(mvm, "Failed to allocate agg queue\n");
866 return -EIO;
867 }
868
869 /* the new tx queue is still connected to the same mac80211 queue */
870 mvm->queue_to_mac80211[txq_id] = vif->hw_queue[tid_to_ac[tid]];
871
872 spin_lock_bh(&mvmsta->lock);
873 tid_data = &mvmsta->tid_data[tid];
9a886586 874 tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
8ca151b5
JB		 875 tid_data->txq_id = txq_id;
876 *ssn = tid_data->ssn;
877
878 IWL_DEBUG_TX_QUEUES(mvm,
879 "Start AGG: sta %d tid %d queue %d - ssn = %d, next_recl = %d\n",
880 mvmsta->sta_id, tid, txq_id, tid_data->ssn,
881 tid_data->next_reclaimed);
882
883 if (tid_data->ssn == tid_data->next_reclaimed) {
884 tid_data->state = IWL_AGG_STARTING;
885 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
886 } else {
887 tid_data->state = IWL_EMPTYING_HW_QUEUE_ADDBA;
888 }
889
890 spin_unlock_bh(&mvmsta->lock);
891
892 return 0;
893}
894
895int iwl_mvm_sta_tx_agg_oper(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
896 struct ieee80211_sta *sta, u16 tid, u8 buf_size)
897{
5b577a90 898 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
8ca151b5
JB		 899 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
900 int queue, fifo, ret;
901 u16 ssn;
902
903 buf_size = min_t(int, buf_size, LINK_QUAL_AGG_FRAME_LIMIT_DEF);
904
905 spin_lock_bh(&mvmsta->lock);
906 ssn = tid_data->ssn;
907 queue = tid_data->txq_id;
908 tid_data->state = IWL_AGG_ON;
909 tid_data->ssn = 0xffff;
910 spin_unlock_bh(&mvmsta->lock);
911
912 fifo = iwl_mvm_ac_to_tx_fifo[tid_to_ac[tid]];
913
914 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true);
915 if (ret)
916 return -EIO;
917
918 iwl_trans_txq_enable(mvm->trans, queue, fifo, mvmsta->sta_id, tid,
919 buf_size, ssn);
920
921 /*
922 * Even though in theory the peer could have different
923 * aggregation reorder buffer sizes for different sessions,
924 * our ucode doesn't allow for that and has a global limit
925 * for each station. Therefore, use the minimum of all the
926 * aggregation sessions and our default value.
927 */
928 mvmsta->max_agg_bufsize =
929 min(mvmsta->max_agg_bufsize, buf_size);
930 mvmsta->lq_sta.lq.agg_frame_cnt_limit = mvmsta->max_agg_bufsize;
931
9ee718aa
EL		 932 IWL_DEBUG_HT(mvm, "Tx aggregation enabled on ra = %pM tid = %d\n",
933 sta->addr, tid);
934
8ca151b5
JB		 935 if (mvm->cfg->ht_params->use_rts_for_aggregation) {
936 /*
937 * switch to RTS/CTS if it is the prefer protection
938 * method for HT traffic
9ee718aa 939 * this function also sends the LQ command
8ca151b5 940 */
e126b5d9 941 return iwl_mvm_tx_protection(mvm, mvmsta, true);
8ca151b5
JB		 942 /*
943 * TODO: remove the TLC_RTS flag when we tear down the last
944 * AGG session (agg_tids_count in DVM)
945 */
946 }
947
9e680946 948 return iwl_mvm_send_lq_cmd(mvm, &mvmsta->lq_sta.lq, false);
8ca151b5
JB		 949}
950
951int iwl_mvm_sta_tx_agg_stop(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
952 struct ieee80211_sta *sta, u16 tid)
953{
5b577a90 954 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
8ca151b5
JB		 955 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
956 u16 txq_id;
957 int err;
958
f9aa8dd3
EG		 959
960 /*
961 * If mac80211 is cleaning its state, then say that we finished since
962 * our state has been cleared anyway.
963 */
964 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
965 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
966 return 0;
967 }
968
8ca151b5
JB		 969 spin_lock_bh(&mvmsta->lock);
970
971 txq_id = tid_data->txq_id;
972
973 IWL_DEBUG_TX_QUEUES(mvm, "Stop AGG: sta %d tid %d q %d state %d\n",
974 mvmsta->sta_id, tid, txq_id, tid_data->state);
975
976 switch (tid_data->state) {
977 case IWL_AGG_ON:
9a886586 978 tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
8ca151b5
JB		 979
980 IWL_DEBUG_TX_QUEUES(mvm,
981 "ssn = %d, next_recl = %d\n",
982 tid_data->ssn, tid_data->next_reclaimed);
983
984 /* There are still packets for this RA / TID in the HW */
985 if (tid_data->ssn != tid_data->next_reclaimed) {
986 tid_data->state = IWL_EMPTYING_HW_QUEUE_DELBA;
987 err = 0;
988 break;
989 }
990
991 tid_data->ssn = 0xffff;
992 iwl_trans_txq_disable(mvm->trans, txq_id);
993 /* fall through */
994 case IWL_AGG_STARTING:
995 case IWL_EMPTYING_HW_QUEUE_ADDBA:
996 /*
997 * The agg session has been stopped before it was set up. This
998 * can happen when the AddBA timer times out for example.
999 */
1000
1001 /* No barriers since we are under mutex */
1002 lockdep_assert_held(&mvm->mutex);
1003 mvm->queue_to_mac80211[txq_id] = IWL_INVALID_MAC80211_QUEUE;
1004
1005 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1006 tid_data->state = IWL_AGG_OFF;
1007 err = 0;
1008 break;
1009 default:
1010 IWL_ERR(mvm,
1011 "Stopping AGG while state not ON or starting for %d on %d (%d)\n",
1012 mvmsta->sta_id, tid, tid_data->state);
1013 IWL_ERR(mvm,
1014 "\ttid_data->txq_id = %d\n", tid_data->txq_id);
1015 err = -EINVAL;
1016 }
1017
1018 spin_unlock_bh(&mvmsta->lock);
1019
1020 return err;
1021}
1022
e3d9e7ce
EG		 1023int iwl_mvm_sta_tx_agg_flush(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1024 struct ieee80211_sta *sta, u16 tid)
1025{
5b577a90 1026 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
e3d9e7ce
EG		 1027 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
1028 u16 txq_id;
b6658ff8 1029 enum iwl_mvm_agg_state old_state;
e3d9e7ce
EG		 1030
1031 /*
1032 * First set the agg state to OFF to avoid calling
1033 * ieee80211_stop_tx_ba_cb in iwl_mvm_check_ratid_empty.
1034 */
1035 spin_lock_bh(&mvmsta->lock);
1036 txq_id = tid_data->txq_id;
1037 IWL_DEBUG_TX_QUEUES(mvm, "Flush AGG: sta %d tid %d q %d state %d\n",
1038 mvmsta->sta_id, tid, txq_id, tid_data->state);
b6658ff8 1039 old_state = tid_data->state;
e3d9e7ce
EG		 1040 tid_data->state = IWL_AGG_OFF;
1041 spin_unlock_bh(&mvmsta->lock);
1042
b6658ff8
JB		 1043 if (old_state >= IWL_AGG_ON) {
1044 if (iwl_mvm_flush_tx_path(mvm, BIT(txq_id), true))
1045 IWL_ERR(mvm, "Couldn't flush the AGG queue\n");
1046
1047 iwl_trans_txq_disable(mvm->trans, tid_data->txq_id);
1048 }
e3d9e7ce 1049
e3d9e7ce
EG		 1050 mvm->queue_to_mac80211[tid_data->txq_id] =
1051 IWL_INVALID_MAC80211_QUEUE;
1052
1053 return 0;
1054}
1055
8ca151b5
JB		 1056static int iwl_mvm_set_fw_key_idx(struct iwl_mvm *mvm)
1057{
1058 int i;
1059
1060 lockdep_assert_held(&mvm->mutex);
1061
1062 i = find_first_zero_bit(mvm->fw_key_table, STA_KEY_MAX_NUM);
1063
1064 if (i == STA_KEY_MAX_NUM)
1065 return STA_KEY_IDX_INVALID;
1066
1067 __set_bit(i, mvm->fw_key_table);
1068
1069 return i;
1070}
1071
1072static u8 iwl_mvm_get_key_sta_id(struct ieee80211_vif *vif,
1073 struct ieee80211_sta *sta)
1074{
1075 struct iwl_mvm_vif *mvmvif = (void *)vif->drv_priv;
1076
1077 if (sta) {
1078 struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv;
1079
1080 return mvm_sta->sta_id;
1081 }
1082
1083 /*
1084 * The device expects GTKs for station interfaces to be
1085 * installed as GTKs for the AP station. If we have no
1086 * station ID, then use AP's station ID.
1087 */
1088 if (vif->type == NL80211_IFTYPE_STATION &&
1089 mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT)
1090 return mvmvif->ap_sta_id;
1091
881acd89 1092 return IWL_MVM_STATION_COUNT;
8ca151b5
JB		 1093}
1094
1095static int iwl_mvm_send_sta_key(struct iwl_mvm *mvm,
1096 struct iwl_mvm_sta *mvm_sta,
1097 struct ieee80211_key_conf *keyconf,
1098 u8 sta_id, u32 tkip_iv32, u16 *tkip_p1k,
1099 u32 cmd_flags)
1100{
1101 __le16 key_flags;
5a258aae 1102 struct iwl_mvm_add_sta_key_cmd cmd = {};
8ca151b5
JB		 1103 int ret, status;
1104 u16 keyidx;
1105 int i;
5a258aae 1106 u32 mac_id_n_color = mvm_sta->mac_id_n_color;
8ca151b5
JB		 1107
1108 keyidx = (keyconf->keyidx << STA_KEY_FLG_KEYID_POS) &
1109 STA_KEY_FLG_KEYID_MSK;
1110 key_flags = cpu_to_le16(keyidx);
1111 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_KEY_MAP);
1112
1113 switch (keyconf->cipher) {
1114 case WLAN_CIPHER_SUITE_TKIP:
1115 key_flags |= cpu_to_le16(STA_KEY_FLG_TKIP);
5a258aae 1116 cmd.tkip_rx_tsc_byte2 = tkip_iv32;
8ca151b5 1117 for (i = 0; i < 5; i++)
5a258aae
MS		 1118 cmd.tkip_rx_ttak[i] = cpu_to_le16(tkip_p1k[i]);
1119 memcpy(cmd.key, keyconf->key, keyconf->keylen);
8ca151b5
JB		 1120 break;
1121 case WLAN_CIPHER_SUITE_CCMP:
1122 key_flags |= cpu_to_le16(STA_KEY_FLG_CCM);
5a258aae 1123 memcpy(cmd.key, keyconf->key, keyconf->keylen);
8ca151b5
JB		 1124 break;
1125 default:
e36e5433
MS		 1126 key_flags |= cpu_to_le16(STA_KEY_FLG_EXT);
1127 memcpy(cmd.key, keyconf->key, keyconf->keylen);
8ca151b5
JB		 1128 }
1129
1130 if (!(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE))
1131 key_flags |= cpu_to_le16(STA_KEY_MULTICAST);
1132
5a258aae
MS		 1133 cmd.key_offset = keyconf->hw_key_idx;
1134 cmd.key_flags = key_flags;
8ca151b5
JB		 1135 cmd.sta_id = sta_id;
1136
1137 status = ADD_STA_SUCCESS;
1138 if (cmd_flags == CMD_SYNC)
5a258aae
MS		 1139 ret = iwl_mvm_send_add_sta_key_cmd_status(mvm, &cmd,
1140 mac_id_n_color,
1141 &status);
8ca151b5 1142 else
5a258aae
MS		 1143 ret = iwl_mvm_send_add_sta_key_cmd(mvm, CMD_ASYNC, &cmd,
1144 mac_id_n_color);
8ca151b5
JB		 1145
1146 switch (status) {
1147 case ADD_STA_SUCCESS:
1148 IWL_DEBUG_WEP(mvm, "MODIFY_STA: set dynamic key passed\n");
1149 break;
1150 default:
1151 ret = -EIO;
1152 IWL_ERR(mvm, "MODIFY_STA: set dynamic key failed\n");
1153 break;
1154 }
1155
1156 return ret;
1157}
1158
1159static int iwl_mvm_send_sta_igtk(struct iwl_mvm *mvm,
1160 struct ieee80211_key_conf *keyconf,
1161 u8 sta_id, bool remove_key)
1162{
1163 struct iwl_mvm_mgmt_mcast_key_cmd igtk_cmd = {};
1164
1165 /* verify the key details match the required command's expectations */
1166 if (WARN_ON((keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC) ||
1167 (keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE) ||
1168 (keyconf->keyidx != 4 && keyconf->keyidx != 5)))
1169 return -EINVAL;
1170
1171 igtk_cmd.key_id = cpu_to_le32(keyconf->keyidx);
1172 igtk_cmd.sta_id = cpu_to_le32(sta_id);
1173
1174 if (remove_key) {
1175 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_NOT_VALID);
1176 } else {
1177 struct ieee80211_key_seq seq;
1178 const u8 *pn;
1179
1180 memcpy(igtk_cmd.IGTK, keyconf->key, keyconf->keylen);
1181 ieee80211_aes_cmac_calculate_k1_k2(keyconf,
1182 igtk_cmd.K1, igtk_cmd.K2);
1183 ieee80211_get_key_rx_seq(keyconf, 0, &seq);
1184 pn = seq.aes_cmac.pn;
1185 igtk_cmd.receive_seq_cnt = cpu_to_le64(((u64) pn[5] << 0) |
1186 ((u64) pn[4] << 8) |
1187 ((u64) pn[3] << 16) |
1188 ((u64) pn[2] << 24) |
1189 ((u64) pn[1] << 32) |
1190 ((u64) pn[0] << 40));
1191 }
1192
1193 IWL_DEBUG_INFO(mvm, "%s igtk for sta %u\n",
1194 remove_key ? "removing" : "installing",
1195 igtk_cmd.sta_id);
1196
1197 return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, CMD_SYNC,
1198 sizeof(igtk_cmd), &igtk_cmd);
1199}
1200
1201
1202static inline u8 *iwl_mvm_get_mac_addr(struct iwl_mvm *mvm,
1203 struct ieee80211_vif *vif,
1204 struct ieee80211_sta *sta)
1205{
1206 struct iwl_mvm_vif *mvmvif = (void *)vif->drv_priv;
1207
1208 if (sta)
1209 return sta->addr;
1210
1211 if (vif->type == NL80211_IFTYPE_STATION &&
1212 mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT) {
1213 u8 sta_id = mvmvif->ap_sta_id;
1214 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
1215 lockdep_is_held(&mvm->mutex));
1216 return sta->addr;
1217 }
1218
1219
1220 return NULL;
1221}
1222
1223int iwl_mvm_set_sta_key(struct iwl_mvm *mvm,
1224 struct ieee80211_vif *vif,
1225 struct ieee80211_sta *sta,
1226 struct ieee80211_key_conf *keyconf,
1227 bool have_key_offset)
1228{
1229 struct iwl_mvm_sta *mvm_sta;
1230 int ret;
1231 u8 *addr, sta_id;
1232 struct ieee80211_key_seq seq;
1233 u16 p1k[5];
1234
1235 lockdep_assert_held(&mvm->mutex);
1236
1237 /* Get the station id from the mvm local station table */
1238 sta_id = iwl_mvm_get_key_sta_id(vif, sta);
881acd89 1239 if (sta_id == IWL_MVM_STATION_COUNT) {
8ca151b5
JB		 1240 IWL_ERR(mvm, "Failed to find station id\n");
1241 return -EINVAL;
1242 }
1243
1244 if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC) {
1245 ret = iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, false);
1246 goto end;
1247 }
1248
1249 /*
1250 * It is possible that the 'sta' parameter is NULL, and thus
1251 * there is a need to retrieve the sta from the local station table.
1252 */
1253 if (!sta) {
1254 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
1255 lockdep_is_held(&mvm->mutex));
1256 if (IS_ERR_OR_NULL(sta)) {
1257 IWL_ERR(mvm, "Invalid station id\n");
1258 return -EINVAL;
1259 }
1260 }
1261
1262 mvm_sta = (struct iwl_mvm_sta *)sta->drv_priv;
1263 if (WARN_ON_ONCE(mvm_sta->vif != vif))
1264 return -EINVAL;
1265
1266 if (!have_key_offset) {
1267 /*
1268 * The D3 firmware hardcodes the PTK offset to 0, so we have to
1269 * configure it there. As a result, this workaround exists to
1270 * let the caller set the key offset (hw_key_idx), see d3.c.
1271 */
1272 keyconf->hw_key_idx = iwl_mvm_set_fw_key_idx(mvm);
1273 if (keyconf->hw_key_idx == STA_KEY_IDX_INVALID)
1274 return -ENOSPC;
1275 }
1276
1277 switch (keyconf->cipher) {
1278 case WLAN_CIPHER_SUITE_TKIP:
1279 addr = iwl_mvm_get_mac_addr(mvm, vif, sta);
1280 /* get phase 1 key from mac80211 */
1281 ieee80211_get_key_rx_seq(keyconf, 0, &seq);
1282 ieee80211_get_tkip_rx_p1k(keyconf, addr, seq.tkip.iv32, p1k);
1283 ret = iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, sta_id,
1284 seq.tkip.iv32, p1k, CMD_SYNC);
1285 break;
1286 case WLAN_CIPHER_SUITE_CCMP:
1287 ret = iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, sta_id,
1288 0, NULL, CMD_SYNC);
1289 break;
1290 default:
e36e5433
MS		 1291 ret = iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf,
1292 sta_id, 0, NULL, CMD_SYNC);
8ca151b5
JB		 1293 }
1294
1295 if (ret)
1296 __clear_bit(keyconf->hw_key_idx, mvm->fw_key_table);
1297
1298end:
1299 IWL_DEBUG_WEP(mvm, "key: cipher=%x len=%d idx=%d sta=%pM ret=%d\n",
1300 keyconf->cipher, keyconf->keylen, keyconf->keyidx,
1301 sta->addr, ret);
1302 return ret;
1303}
1304
1305int iwl_mvm_remove_sta_key(struct iwl_mvm *mvm,
1306 struct ieee80211_vif *vif,
1307 struct ieee80211_sta *sta,
1308 struct ieee80211_key_conf *keyconf)
1309{
1310 struct iwl_mvm_sta *mvm_sta;
5a258aae 1311 struct iwl_mvm_add_sta_key_cmd cmd = {};
8ca151b5
JB		 1312 __le16 key_flags;
1313 int ret, status;
1314 u8 sta_id;
1315
1316 lockdep_assert_held(&mvm->mutex);
1317
1318 /* Get the station id from the mvm local station table */
1319 sta_id = iwl_mvm_get_key_sta_id(vif, sta);
1320
1321 IWL_DEBUG_WEP(mvm, "mvm remove dynamic key: idx=%d sta=%d\n",
1322 keyconf->keyidx, sta_id);
1323
1324 if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC)
1325 return iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, true);
1326
1327 ret = __test_and_clear_bit(keyconf->hw_key_idx, mvm->fw_key_table);
1328 if (!ret) {
1329 IWL_ERR(mvm, "offset %d not used in fw key table.\n",
1330 keyconf->hw_key_idx);
1331 return -ENOENT;
1332 }
1333
881acd89 1334 if (sta_id == IWL_MVM_STATION_COUNT) {
8ca151b5
JB		 1335 IWL_DEBUG_WEP(mvm, "station non-existent, early return.\n");
1336 return 0;
1337 }
1338
1339 /*
1340 * It is possible that the 'sta' parameter is NULL, and thus
1341 * there is a need to retrieve the sta from the local station table,
1342 * for example when a GTK is removed (where the sta_id will then be
1343 * the AP ID, and no station was passed by mac80211.)
1344 */
1345 if (!sta) {
1346 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
1347 lockdep_is_held(&mvm->mutex));
1348 if (!sta) {
1349 IWL_ERR(mvm, "Invalid station id\n");
1350 return -EINVAL;
1351 }
1352 }
1353
1354 mvm_sta = (struct iwl_mvm_sta *)sta->drv_priv;
1355 if (WARN_ON_ONCE(mvm_sta->vif != vif))
1356 return -EINVAL;
1357
8115efbd
EG		 1358 key_flags = cpu_to_le16((keyconf->keyidx << STA_KEY_FLG_KEYID_POS) &
1359 STA_KEY_FLG_KEYID_MSK);
8ca151b5
JB		 1360 key_flags |= cpu_to_le16(STA_KEY_FLG_NO_ENC | STA_KEY_FLG_WEP_KEY_MAP);
1361 key_flags |= cpu_to_le16(STA_KEY_NOT_VALID);
1362
1363 if (!(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE))
1364 key_flags |= cpu_to_le16(STA_KEY_MULTICAST);
1365
5a258aae
MS		 1366 cmd.key_flags = key_flags;
1367 cmd.key_offset = keyconf->hw_key_idx;
8ca151b5
JB		 1368 cmd.sta_id = sta_id;
1369
8ca151b5 1370 status = ADD_STA_SUCCESS;
5a258aae
MS		 1371 ret = iwl_mvm_send_add_sta_key_cmd_status(mvm, &cmd,
1372 mvm_sta->mac_id_n_color,
1373 &status);
8ca151b5
JB		 1374
1375 switch (status) {
1376 case ADD_STA_SUCCESS:
1377 IWL_DEBUG_WEP(mvm, "MODIFY_STA: remove sta key passed\n");
1378 break;
1379 default:
1380 ret = -EIO;
1381 IWL_ERR(mvm, "MODIFY_STA: remove sta key failed\n");
1382 break;
1383 }
1384
1385 return ret;
1386}
1387
1388void iwl_mvm_update_tkip_key(struct iwl_mvm *mvm,
1389 struct ieee80211_vif *vif,
1390 struct ieee80211_key_conf *keyconf,
1391 struct ieee80211_sta *sta, u32 iv32,
1392 u16 *phase1key)
1393{
c3eb536a 1394 struct iwl_mvm_sta *mvm_sta;
8ca151b5
JB		 1395 u8 sta_id = iwl_mvm_get_key_sta_id(vif, sta);
1396
881acd89 1397 if (WARN_ON_ONCE(sta_id == IWL_MVM_STATION_COUNT))
8ca151b5
JB		 1398 return;
1399
c3eb536a
BL		 1400 rcu_read_lock();
1401
1402 if (!sta) {
1403 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
1404 if (WARN_ON(IS_ERR_OR_NULL(sta))) {
1405 rcu_read_unlock();
1406 return;
1407 }
1408 }
1409
1410 mvm_sta = (void *)sta->drv_priv;
8ca151b5
JB		 1411 iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, sta_id,
1412 iv32, phase1key, CMD_ASYNC);
c3eb536a 1413 rcu_read_unlock();
8ca151b5
JB		 1414}
1415
9cc40712
JB		 1416void iwl_mvm_sta_modify_ps_wake(struct iwl_mvm *mvm,
1417 struct ieee80211_sta *sta)
8ca151b5 1418{
5b577a90 1419 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
5a258aae 1420 struct iwl_mvm_add_sta_cmd_v6 cmd = {
8ca151b5 1421 .add_modify = STA_MODE_MODIFY,
9cc40712 1422 .sta_id = mvmsta->sta_id,
5af01772 1423 .station_flags_msk = cpu_to_le32(STA_FLG_PS),
9cc40712 1424 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
8ca151b5
JB		 1425 };
1426 int ret;
1427
5a258aae 1428 ret = iwl_mvm_send_add_sta_cmd(mvm, CMD_ASYNC, &cmd);
8ca151b5
JB		 1429 if (ret)
1430 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
1431}
1432
9cc40712
JB		 1433void iwl_mvm_sta_modify_sleep_tx_count(struct iwl_mvm *mvm,
1434 struct ieee80211_sta *sta,
8ca151b5
JB		 1435 enum ieee80211_frame_release_type reason,
1436 u16 cnt)
1437{
1438 u16 sleep_state_flags =
1439 (reason == IEEE80211_FRAME_RELEASE_UAPSD) ?
1440 STA_SLEEP_STATE_UAPSD : STA_SLEEP_STATE_PS_POLL;
5b577a90 1441 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
5a258aae 1442 struct iwl_mvm_add_sta_cmd_v6 cmd = {
8ca151b5 1443 .add_modify = STA_MODE_MODIFY,
9cc40712 1444 .sta_id = mvmsta->sta_id,
8ca151b5
JB		 1445 .modify_mask = STA_MODIFY_SLEEPING_STA_TX_COUNT,
1446 .sleep_tx_count = cpu_to_le16(cnt),
9cc40712 1447 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
8ca151b5
JB		 1448 /*
1449 * Same modify mask for sleep_tx_count and sleep_state_flags so
1450 * we must set the sleep_state_flags too.
1451 */
1452 .sleep_state_flags = cpu_to_le16(sleep_state_flags),
1453 };
1454 int ret;
1455
1456 /* TODO: somehow the fw doesn't seem to take PS_POLL into account */
5a258aae 1457 ret = iwl_mvm_send_add_sta_cmd(mvm, CMD_ASYNC, &cmd);
8ca151b5
JB		 1458 if (ret)
1459 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
1460}
Linux kernel - Deliverables
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