1 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
2 /*
3 * Copyright (C) 2012-2014, 2018-2021 Intel Corporation
4 * Copyright (C) 2013-2014 Intel Mobile Communications GmbH
5 * Copyright (C) 2015-2017 Intel Deutschland GmbH
6 */
7 #include <linux/etherdevice.h>
8 #include <linux/crc32.h>
9 #include <net/mac80211.h>
10 #include "iwl-io.h"
11 #include "iwl-prph.h"
12 #include "fw-api.h"
13 #include "mvm.h"
14 #include "time-event.h"
15
16 const u8 iwl_mvm_ac_to_tx_fifo[] = {
17 IWL_MVM_TX_FIFO_VO,
18 IWL_MVM_TX_FIFO_VI,
19 IWL_MVM_TX_FIFO_BE,
20 IWL_MVM_TX_FIFO_BK,
21 };
22
23 const u8 iwl_mvm_ac_to_gen2_tx_fifo[] = {
24 IWL_GEN2_EDCA_TX_FIFO_VO,
25 IWL_GEN2_EDCA_TX_FIFO_VI,
26 IWL_GEN2_EDCA_TX_FIFO_BE,
27 IWL_GEN2_EDCA_TX_FIFO_BK,
28 IWL_GEN2_TRIG_TX_FIFO_VO,
29 IWL_GEN2_TRIG_TX_FIFO_VI,
30 IWL_GEN2_TRIG_TX_FIFO_BE,
31 IWL_GEN2_TRIG_TX_FIFO_BK,
32 };
33
34 struct iwl_mvm_mac_iface_iterator_data {
35 struct iwl_mvm *mvm;
36 struct ieee80211_vif *vif;
37 unsigned long available_mac_ids[BITS_TO_LONGS(NUM_MAC_INDEX_DRIVER)];
38 unsigned long available_tsf_ids[BITS_TO_LONGS(NUM_TSF_IDS)];
39 enum iwl_tsf_id preferred_tsf;
40 bool found_vif;
41 };
42
iwl_mvm_mac_tsf_id_iter(void * _data,u8 * mac,struct ieee80211_vif * vif)43 static void iwl_mvm_mac_tsf_id_iter(void *_data, u8 *mac,
44 struct ieee80211_vif *vif)
45 {
46 struct iwl_mvm_mac_iface_iterator_data *data = _data;
47 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
48 u16 min_bi;
49
50 /* Skip the interface for which we are trying to assign a tsf_id */
51 if (vif == data->vif)
52 return;
53
54 /*
55 * The TSF is a hardware/firmware resource, there are 4 and
56 * the driver should assign and free them as needed. However,
57 * there are cases where 2 MACs should share the same TSF ID
58 * for the purpose of clock sync, an optimization to avoid
59 * clock drift causing overlapping TBTTs/DTIMs for a GO and
60 * client in the system.
61 *
62 * The firmware will decide according to the MAC type which
63 * will be the leader and follower. Clients that need to sync
64 * with a remote station will be the leader, and an AP or GO
65 * will be the follower.
66 *
67 * Depending on the new interface type it can be following
68 * or become the leader of an existing interface.
69 */
70 switch (data->vif->type) {
71 case NL80211_IFTYPE_STATION:
72 /*
73 * The new interface is a client, so if the one we're iterating
74 * is an AP, and the beacon interval of the AP is a multiple or
75 * divisor of the beacon interval of the client, the same TSF
76 * should be used to avoid drift between the new client and
77 * existing AP. The existing AP will get drift updates from the
78 * new client context in this case.
79 */
80 if (vif->type != NL80211_IFTYPE_AP ||
81 data->preferred_tsf != NUM_TSF_IDS ||
82 !test_bit(mvmvif->tsf_id, data->available_tsf_ids))
83 break;
84
85 min_bi = min(data->vif->bss_conf.beacon_int,
86 vif->bss_conf.beacon_int);
87
88 if (!min_bi)
89 break;
90
91 if ((data->vif->bss_conf.beacon_int -
92 vif->bss_conf.beacon_int) % min_bi == 0) {
93 data->preferred_tsf = mvmvif->tsf_id;
94 return;
95 }
96 break;
97
98 case NL80211_IFTYPE_AP:
99 /*
100 * The new interface is AP/GO, so if its beacon interval is a
101 * multiple or a divisor of the beacon interval of an existing
102 * interface, it should get drift updates from an existing
103 * client or use the same TSF as an existing GO. There's no
104 * drift between TSFs internally but if they used different
105 * TSFs then a new client MAC could update one of them and
106 * cause drift that way.
107 */
108 if ((vif->type != NL80211_IFTYPE_AP &&
109 vif->type != NL80211_IFTYPE_STATION) ||
110 data->preferred_tsf != NUM_TSF_IDS ||
111 !test_bit(mvmvif->tsf_id, data->available_tsf_ids))
112 break;
113
114 min_bi = min(data->vif->bss_conf.beacon_int,
115 vif->bss_conf.beacon_int);
116
117 if (!min_bi)
118 break;
119
120 if ((data->vif->bss_conf.beacon_int -
121 vif->bss_conf.beacon_int) % min_bi == 0) {
122 data->preferred_tsf = mvmvif->tsf_id;
123 return;
124 }
125 break;
126 default:
127 /*
128 * For all other interface types there's no need to
129 * take drift into account. Either they're exclusive
130 * like IBSS and monitor, or we don't care much about
131 * their TSF (like P2P Device), but we won't be able
132 * to share the TSF resource.
133 */
134 break;
135 }
136
137 /*
138 * Unless we exited above, we can't share the TSF resource
139 * that the virtual interface we're iterating over is using
140 * with the new one, so clear the available bit and if this
141 * was the preferred one, reset that as well.
142 */
143 __clear_bit(mvmvif->tsf_id, data->available_tsf_ids);
144
145 if (data->preferred_tsf == mvmvif->tsf_id)
146 data->preferred_tsf = NUM_TSF_IDS;
147 }
148
iwl_mvm_mac_iface_iterator(void * _data,u8 * mac,struct ieee80211_vif * vif)149 static void iwl_mvm_mac_iface_iterator(void *_data, u8 *mac,
150 struct ieee80211_vif *vif)
151 {
152 struct iwl_mvm_mac_iface_iterator_data *data = _data;
153 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
154
155 /* Iterator may already find the interface being added -- skip it */
156 if (vif == data->vif) {
157 data->found_vif = true;
158 return;
159 }
160
161 /* Mark MAC IDs as used by clearing the available bit, and
162 * (below) mark TSFs as used if their existing use is not
163 * compatible with the new interface type.
164 * No locking or atomic bit operations are needed since the
165 * data is on the stack of the caller function.
166 */
167 __clear_bit(mvmvif->id, data->available_mac_ids);
168
169 /* find a suitable tsf_id */
170 iwl_mvm_mac_tsf_id_iter(_data, mac, vif);
171 }
172
iwl_mvm_mac_ctxt_recalc_tsf_id(struct iwl_mvm * mvm,struct ieee80211_vif * vif)173 void iwl_mvm_mac_ctxt_recalc_tsf_id(struct iwl_mvm *mvm,
174 struct ieee80211_vif *vif)
175 {
176 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
177 struct iwl_mvm_mac_iface_iterator_data data = {
178 .mvm = mvm,
179 .vif = vif,
180 .available_tsf_ids = { (1 << NUM_TSF_IDS) - 1 },
181 /* no preference yet */
182 .preferred_tsf = NUM_TSF_IDS,
183 };
184
185 ieee80211_iterate_active_interfaces_atomic(
186 mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
187 iwl_mvm_mac_tsf_id_iter, &data);
188
189 if (data.preferred_tsf != NUM_TSF_IDS)
190 mvmvif->tsf_id = data.preferred_tsf;
191 else if (!test_bit(mvmvif->tsf_id, data.available_tsf_ids))
192 mvmvif->tsf_id = find_first_bit(data.available_tsf_ids,
193 NUM_TSF_IDS);
194 }
195
iwl_mvm_mac_ctxt_init(struct iwl_mvm * mvm,struct ieee80211_vif * vif)196 int iwl_mvm_mac_ctxt_init(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
197 {
198 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
199 struct iwl_mvm_mac_iface_iterator_data data = {
200 .mvm = mvm,
201 .vif = vif,
202 .available_mac_ids = { (1 << NUM_MAC_INDEX_DRIVER) - 1 },
203 .available_tsf_ids = { (1 << NUM_TSF_IDS) - 1 },
204 /* no preference yet */
205 .preferred_tsf = NUM_TSF_IDS,
206 .found_vif = false,
207 };
208 int ret, i;
209
210 lockdep_assert_held(&mvm->mutex);
211
212 /*
213 * Allocate a MAC ID and a TSF for this MAC, along with the queues
214 * and other resources.
215 */
216
217 /*
218 * Before the iterator, we start with all MAC IDs and TSFs available.
219 *
220 * During iteration, all MAC IDs are cleared that are in use by other
221 * virtual interfaces, and all TSF IDs are cleared that can't be used
222 * by this new virtual interface because they're used by an interface
223 * that can't share it with the new one.
224 * At the same time, we check if there's a preferred TSF in the case
225 * that we should share it with another interface.
226 */
227
228 /* Currently, MAC ID 0 should be used only for the managed/IBSS vif */
229 switch (vif->type) {
230 case NL80211_IFTYPE_ADHOC:
231 break;
232 case NL80211_IFTYPE_STATION:
233 if (!vif->p2p)
234 break;
235 fallthrough;
236 default:
237 __clear_bit(0, data.available_mac_ids);
238 }
239
240 ieee80211_iterate_active_interfaces_atomic(
241 mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
242 iwl_mvm_mac_iface_iterator, &data);
243
244 /*
245 * In the case we're getting here during resume, it's similar to
246 * firmware restart, and with RESUME_ALL the iterator will find
247 * the vif being added already.
248 * We don't want to reassign any IDs in either case since doing
249 * so would probably assign different IDs (as interfaces aren't
250 * necessarily added in the same order), but the old IDs were
251 * preserved anyway, so skip ID assignment for both resume and
252 * recovery.
253 */
254 if (data.found_vif)
255 return 0;
256
257 /* Therefore, in recovery, we can't get here */
258 if (WARN_ON_ONCE(test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)))
259 return -EBUSY;
260
261 mvmvif->id = find_first_bit(data.available_mac_ids,
262 NUM_MAC_INDEX_DRIVER);
263 if (mvmvif->id == NUM_MAC_INDEX_DRIVER) {
264 IWL_ERR(mvm, "Failed to init MAC context - no free ID!\n");
265 ret = -EIO;
266 goto exit_fail;
267 }
268
269 if (data.preferred_tsf != NUM_TSF_IDS)
270 mvmvif->tsf_id = data.preferred_tsf;
271 else
272 mvmvif->tsf_id = find_first_bit(data.available_tsf_ids,
273 NUM_TSF_IDS);
274 if (mvmvif->tsf_id == NUM_TSF_IDS) {
275 IWL_ERR(mvm, "Failed to init MAC context - no free TSF!\n");
276 ret = -EIO;
277 goto exit_fail;
278 }
279
280 mvmvif->color = 0;
281
282 INIT_LIST_HEAD(&mvmvif->time_event_data.list);
283 mvmvif->time_event_data.id = TE_MAX;
284
285 /* No need to allocate data queues to P2P Device MAC and NAN.*/
286 if (vif->type == NL80211_IFTYPE_P2P_DEVICE)
287 return 0;
288
289 /* Allocate the CAB queue for softAP and GO interfaces */
290 if (vif->type == NL80211_IFTYPE_AP ||
291 vif->type == NL80211_IFTYPE_ADHOC) {
292 /*
293 * For TVQM this will be overwritten later with the FW assigned
294 * queue value (when queue is enabled).
295 */
296 mvmvif->cab_queue = IWL_MVM_DQA_GCAST_QUEUE;
297 }
298
299 mvmvif->bcast_sta.sta_id = IWL_MVM_INVALID_STA;
300 mvmvif->mcast_sta.sta_id = IWL_MVM_INVALID_STA;
301 mvmvif->ap_sta_id = IWL_MVM_INVALID_STA;
302
303 for (i = 0; i < NUM_IWL_MVM_SMPS_REQ; i++)
304 mvmvif->smps_requests[i] = IEEE80211_SMPS_AUTOMATIC;
305
306 return 0;
307
308 exit_fail:
309 memset(mvmvif, 0, sizeof(struct iwl_mvm_vif));
310 return ret;
311 }
312
iwl_mvm_ack_rates(struct iwl_mvm * mvm,struct ieee80211_vif * vif,enum nl80211_band band,u8 * cck_rates,u8 * ofdm_rates)313 static void iwl_mvm_ack_rates(struct iwl_mvm *mvm,
314 struct ieee80211_vif *vif,
315 enum nl80211_band band,
316 u8 *cck_rates, u8 *ofdm_rates)
317 {
318 struct ieee80211_supported_band *sband;
319 unsigned long basic = vif->bss_conf.basic_rates;
320 int lowest_present_ofdm = 100;
321 int lowest_present_cck = 100;
322 u8 cck = 0;
323 u8 ofdm = 0;
324 int i;
325
326 sband = mvm->hw->wiphy->bands[band];
327
328 for_each_set_bit(i, &basic, BITS_PER_LONG) {
329 int hw = sband->bitrates[i].hw_value;
330 if (hw >= IWL_FIRST_OFDM_RATE) {
331 ofdm |= BIT(hw - IWL_FIRST_OFDM_RATE);
332 if (lowest_present_ofdm > hw)
333 lowest_present_ofdm = hw;
334 } else {
335 BUILD_BUG_ON(IWL_FIRST_CCK_RATE != 0);
336
337 cck |= BIT(hw);
338 if (lowest_present_cck > hw)
339 lowest_present_cck = hw;
340 }
341 }
342
343 /*
344 * Now we've got the basic rates as bitmaps in the ofdm and cck
345 * variables. This isn't sufficient though, as there might not
346 * be all the right rates in the bitmap. E.g. if the only basic
347 * rates are 5.5 Mbps and 11 Mbps, we still need to add 1 Mbps
348 * and 6 Mbps because the 802.11-2007 standard says in 9.6:
349 *
350 * [...] a STA responding to a received frame shall transmit
351 * its Control Response frame [...] at the highest rate in the
352 * BSSBasicRateSet parameter that is less than or equal to the
353 * rate of the immediately previous frame in the frame exchange
354 * sequence ([...]) and that is of the same modulation class
355 * ([...]) as the received frame. If no rate contained in the
356 * BSSBasicRateSet parameter meets these conditions, then the
357 * control frame sent in response to a received frame shall be
358 * transmitted at the highest mandatory rate of the PHY that is
359 * less than or equal to the rate of the received frame, and
360 * that is of the same modulation class as the received frame.
361 *
362 * As a consequence, we need to add all mandatory rates that are
363 * lower than all of the basic rates to these bitmaps.
364 */
365
366 if (IWL_RATE_24M_INDEX < lowest_present_ofdm)
367 ofdm |= IWL_RATE_BIT_MSK(24) >> IWL_FIRST_OFDM_RATE;
368 if (IWL_RATE_12M_INDEX < lowest_present_ofdm)
369 ofdm |= IWL_RATE_BIT_MSK(12) >> IWL_FIRST_OFDM_RATE;
370 /* 6M already there or needed so always add */
371 ofdm |= IWL_RATE_BIT_MSK(6) >> IWL_FIRST_OFDM_RATE;
372
373 /*
374 * CCK is a bit more complex with DSSS vs. HR/DSSS vs. ERP.
375 * Note, however:
376 * - if no CCK rates are basic, it must be ERP since there must
377 * be some basic rates at all, so they're OFDM => ERP PHY
378 * (or we're in 5 GHz, and the cck bitmap will never be used)
379 * - if 11M is a basic rate, it must be ERP as well, so add 5.5M
380 * - if 5.5M is basic, 1M and 2M are mandatory
381 * - if 2M is basic, 1M is mandatory
382 * - if 1M is basic, that's the only valid ACK rate.
383 * As a consequence, it's not as complicated as it sounds, just add
384 * any lower rates to the ACK rate bitmap.
385 */
386 if (IWL_RATE_11M_INDEX < lowest_present_cck)
387 cck |= IWL_RATE_BIT_MSK(11) >> IWL_FIRST_CCK_RATE;
388 if (IWL_RATE_5M_INDEX < lowest_present_cck)
389 cck |= IWL_RATE_BIT_MSK(5) >> IWL_FIRST_CCK_RATE;
390 if (IWL_RATE_2M_INDEX < lowest_present_cck)
391 cck |= IWL_RATE_BIT_MSK(2) >> IWL_FIRST_CCK_RATE;
392 /* 1M already there or needed so always add */
393 cck |= IWL_RATE_BIT_MSK(1) >> IWL_FIRST_CCK_RATE;
394
395 *cck_rates = cck;
396 *ofdm_rates = ofdm;
397 }
398
iwl_mvm_mac_ctxt_set_ht_flags(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct iwl_mac_ctx_cmd * cmd)399 static void iwl_mvm_mac_ctxt_set_ht_flags(struct iwl_mvm *mvm,
400 struct ieee80211_vif *vif,
401 struct iwl_mac_ctx_cmd *cmd)
402 {
403 /* for both sta and ap, ht_operation_mode hold the protection_mode */
404 u8 protection_mode = vif->bss_conf.ht_operation_mode &
405 IEEE80211_HT_OP_MODE_PROTECTION;
406 /* The fw does not distinguish between ht and fat */
407 u32 ht_flag = MAC_PROT_FLG_HT_PROT | MAC_PROT_FLG_FAT_PROT;
408
409 IWL_DEBUG_RATE(mvm, "protection mode set to %d\n", protection_mode);
410 /*
411 * See section 9.23.3.1 of IEEE 80211-2012.
412 * Nongreenfield HT STAs Present is not supported.
413 */
414 switch (protection_mode) {
415 case IEEE80211_HT_OP_MODE_PROTECTION_NONE:
416 break;
417 case IEEE80211_HT_OP_MODE_PROTECTION_NONMEMBER:
418 case IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED:
419 cmd->protection_flags |= cpu_to_le32(ht_flag);
420 break;
421 case IEEE80211_HT_OP_MODE_PROTECTION_20MHZ:
422 /* Protect when channel wider than 20MHz */
423 if (vif->bss_conf.chandef.width > NL80211_CHAN_WIDTH_20)
424 cmd->protection_flags |= cpu_to_le32(ht_flag);
425 break;
426 default:
427 IWL_ERR(mvm, "Illegal protection mode %d\n",
428 protection_mode);
429 break;
430 }
431 }
432
iwl_mvm_mac_ctxt_cmd_common(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct iwl_mac_ctx_cmd * cmd,const u8 * bssid_override,u32 action)433 static void iwl_mvm_mac_ctxt_cmd_common(struct iwl_mvm *mvm,
434 struct ieee80211_vif *vif,
435 struct iwl_mac_ctx_cmd *cmd,
436 const u8 *bssid_override,
437 u32 action)
438 {
439 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
440 struct ieee80211_chanctx_conf *chanctx;
441 bool ht_enabled = !!(vif->bss_conf.ht_operation_mode &
442 IEEE80211_HT_OP_MODE_PROTECTION);
443 u8 cck_ack_rates, ofdm_ack_rates;
444 const u8 *bssid = bssid_override ?: vif->bss_conf.bssid;
445 int i;
446
447 cmd->id_and_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id,
448 mvmvif->color));
449 cmd->action = cpu_to_le32(action);
450
451 switch (vif->type) {
452 case NL80211_IFTYPE_STATION:
453 if (vif->p2p)
454 cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_P2P_STA);
455 else
456 cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_BSS_STA);
457 break;
458 case NL80211_IFTYPE_AP:
459 cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_GO);
460 break;
461 case NL80211_IFTYPE_MONITOR:
462 cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_LISTENER);
463 break;
464 case NL80211_IFTYPE_P2P_DEVICE:
465 cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_P2P_DEVICE);
466 break;
467 case NL80211_IFTYPE_ADHOC:
468 cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_IBSS);
469 break;
470 default:
471 WARN_ON_ONCE(1);
472 }
473
474 cmd->tsf_id = cpu_to_le32(mvmvif->tsf_id);
475
476 memcpy(cmd->node_addr, vif->addr, ETH_ALEN);
477
478 if (bssid)
479 memcpy(cmd->bssid_addr, bssid, ETH_ALEN);
480 else
481 eth_broadcast_addr(cmd->bssid_addr);
482
483 rcu_read_lock();
484 chanctx = rcu_dereference(vif->chanctx_conf);
485 iwl_mvm_ack_rates(mvm, vif, chanctx ? chanctx->def.chan->band
486 : NL80211_BAND_2GHZ,
487 &cck_ack_rates, &ofdm_ack_rates);
488 rcu_read_unlock();
489
490 cmd->cck_rates = cpu_to_le32((u32)cck_ack_rates);
491 cmd->ofdm_rates = cpu_to_le32((u32)ofdm_ack_rates);
492
493 cmd->cck_short_preamble =
494 cpu_to_le32(vif->bss_conf.use_short_preamble ?
495 MAC_FLG_SHORT_PREAMBLE : 0);
496 cmd->short_slot =
497 cpu_to_le32(vif->bss_conf.use_short_slot ?
498 MAC_FLG_SHORT_SLOT : 0);
499
500 cmd->filter_flags = 0;
501
502 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
503 u8 txf = iwl_mvm_mac_ac_to_tx_fifo(mvm, i);
504 u8 ucode_ac = iwl_mvm_mac80211_ac_to_ucode_ac(i);
505
506 cmd->ac[ucode_ac].cw_min =
507 cpu_to_le16(mvmvif->queue_params[i].cw_min);
508 cmd->ac[ucode_ac].cw_max =
509 cpu_to_le16(mvmvif->queue_params[i].cw_max);
510 cmd->ac[ucode_ac].edca_txop =
511 cpu_to_le16(mvmvif->queue_params[i].txop * 32);
512 cmd->ac[ucode_ac].aifsn = mvmvif->queue_params[i].aifs;
513 cmd->ac[ucode_ac].fifos_mask = BIT(txf);
514 }
515
516 if (vif->bss_conf.qos)
517 cmd->qos_flags |= cpu_to_le32(MAC_QOS_FLG_UPDATE_EDCA);
518
519 if (vif->bss_conf.use_cts_prot)
520 cmd->protection_flags |= cpu_to_le32(MAC_PROT_FLG_TGG_PROTECT);
521
522 IWL_DEBUG_RATE(mvm, "use_cts_prot %d, ht_operation_mode %d\n",
523 vif->bss_conf.use_cts_prot,
524 vif->bss_conf.ht_operation_mode);
525 if (vif->bss_conf.chandef.width != NL80211_CHAN_WIDTH_20_NOHT)
526 cmd->qos_flags |= cpu_to_le32(MAC_QOS_FLG_TGN);
527 if (ht_enabled)
528 iwl_mvm_mac_ctxt_set_ht_flags(mvm, vif, cmd);
529 }
530
iwl_mvm_mac_ctxt_send_cmd(struct iwl_mvm * mvm,struct iwl_mac_ctx_cmd * cmd)531 static int iwl_mvm_mac_ctxt_send_cmd(struct iwl_mvm *mvm,
532 struct iwl_mac_ctx_cmd *cmd)
533 {
534 int ret = iwl_mvm_send_cmd_pdu(mvm, MAC_CONTEXT_CMD, 0,
535 sizeof(*cmd), cmd);
536 if (ret)
537 IWL_ERR(mvm, "Failed to send MAC context (action:%d): %d\n",
538 le32_to_cpu(cmd->action), ret);
539 return ret;
540 }
541
iwl_mvm_mac_ctxt_cmd_sta(struct iwl_mvm * mvm,struct ieee80211_vif * vif,u32 action,bool force_assoc_off,const u8 * bssid_override)542 static int iwl_mvm_mac_ctxt_cmd_sta(struct iwl_mvm *mvm,
543 struct ieee80211_vif *vif,
544 u32 action, bool force_assoc_off,
545 const u8 *bssid_override)
546 {
547 struct iwl_mac_ctx_cmd cmd = {};
548 struct iwl_mac_data_sta *ctxt_sta;
549
550 WARN_ON(vif->type != NL80211_IFTYPE_STATION);
551
552 /* Fill the common data for all mac context types */
553 iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, bssid_override, action);
554
555 if (vif->p2p) {
556 struct ieee80211_p2p_noa_attr *noa =
557 &vif->bss_conf.p2p_noa_attr;
558
559 cmd.p2p_sta.ctwin = cpu_to_le32(noa->oppps_ctwindow &
560 IEEE80211_P2P_OPPPS_CTWINDOW_MASK);
561 ctxt_sta = &cmd.p2p_sta.sta;
562 } else {
563 ctxt_sta = &cmd.sta;
564 }
565
566 /* We need the dtim_period to set the MAC as associated */
567 if (vif->bss_conf.assoc && vif->bss_conf.dtim_period &&
568 !force_assoc_off) {
569 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
570 u8 ap_sta_id = mvmvif->ap_sta_id;
571 u32 dtim_offs;
572
573 /*
574 * The DTIM count counts down, so when it is N that means N
575 * more beacon intervals happen until the DTIM TBTT. Therefore
576 * add this to the current time. If that ends up being in the
577 * future, the firmware will handle it.
578 *
579 * Also note that the system_timestamp (which we get here as
580 * "sync_device_ts") and TSF timestamp aren't at exactly the
581 * same offset in the frame -- the TSF is at the first symbol
582 * of the TSF, the system timestamp is at signal acquisition
583 * time. This means there's an offset between them of at most
584 * a few hundred microseconds (24 * 8 bits + PLCP time gives
585 * 384us in the longest case), this is currently not relevant
586 * as the firmware wakes up around 2ms before the TBTT.
587 */
588 dtim_offs = vif->bss_conf.sync_dtim_count *
589 vif->bss_conf.beacon_int;
590 /* convert TU to usecs */
591 dtim_offs *= 1024;
592
593 ctxt_sta->dtim_tsf =
594 cpu_to_le64(vif->bss_conf.sync_tsf + dtim_offs);
595 ctxt_sta->dtim_time =
596 cpu_to_le32(vif->bss_conf.sync_device_ts + dtim_offs);
597 ctxt_sta->assoc_beacon_arrive_time =
598 cpu_to_le32(vif->bss_conf.sync_device_ts);
599
600 IWL_DEBUG_INFO(mvm, "DTIM TBTT is 0x%llx/0x%x, offset %d\n",
601 le64_to_cpu(ctxt_sta->dtim_tsf),
602 le32_to_cpu(ctxt_sta->dtim_time),
603 dtim_offs);
604
605 ctxt_sta->is_assoc = cpu_to_le32(1);
606
607 /*
608 * allow multicast data frames only as long as the station is
609 * authorized, i.e., GTK keys are already installed (if needed)
610 */
611 if (ap_sta_id < mvm->fw->ucode_capa.num_stations) {
612 struct ieee80211_sta *sta;
613
614 rcu_read_lock();
615
616 sta = rcu_dereference(mvm->fw_id_to_mac_id[ap_sta_id]);
617 if (!IS_ERR_OR_NULL(sta)) {
618 struct iwl_mvm_sta *mvmsta =
619 iwl_mvm_sta_from_mac80211(sta);
620
621 if (mvmsta->sta_state ==
622 IEEE80211_STA_AUTHORIZED)
623 cmd.filter_flags |=
624 cpu_to_le32(MAC_FILTER_ACCEPT_GRP);
625 }
626
627 rcu_read_unlock();
628 }
629 } else {
630 ctxt_sta->is_assoc = cpu_to_le32(0);
631
632 /* Allow beacons to pass through as long as we are not
633 * associated, or we do not have dtim period information.
634 */
635 cmd.filter_flags |= cpu_to_le32(MAC_FILTER_IN_BEACON);
636 }
637
638 ctxt_sta->bi = cpu_to_le32(vif->bss_conf.beacon_int);
639 ctxt_sta->dtim_interval = cpu_to_le32(vif->bss_conf.beacon_int *
640 vif->bss_conf.dtim_period);
641
642 ctxt_sta->listen_interval = cpu_to_le32(mvm->hw->conf.listen_interval);
643 ctxt_sta->assoc_id = cpu_to_le32(vif->bss_conf.aid);
644
645 if (vif->probe_req_reg && vif->bss_conf.assoc && vif->p2p)
646 cmd.filter_flags |= cpu_to_le32(MAC_FILTER_IN_PROBE_REQUEST);
647
648 if (vif->bss_conf.he_support && !iwlwifi_mod_params.disable_11ax) {
649 cmd.filter_flags |= cpu_to_le32(MAC_FILTER_IN_11AX);
650 if (vif->bss_conf.twt_requester && IWL_MVM_USE_TWT)
651 ctxt_sta->data_policy |= cpu_to_le32(TWT_SUPPORTED);
652 if (vif->bss_conf.twt_protected)
653 ctxt_sta->data_policy |=
654 cpu_to_le32(PROTECTED_TWT_SUPPORTED);
655 if (vif->bss_conf.twt_broadcast)
656 ctxt_sta->data_policy |=
657 cpu_to_le32(BROADCAST_TWT_SUPPORTED);
658 }
659
660
661 return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd);
662 }
663
iwl_mvm_mac_ctxt_cmd_listener(struct iwl_mvm * mvm,struct ieee80211_vif * vif,u32 action)664 static int iwl_mvm_mac_ctxt_cmd_listener(struct iwl_mvm *mvm,
665 struct ieee80211_vif *vif,
666 u32 action)
667 {
668 struct iwl_mac_ctx_cmd cmd = {};
669 u32 tfd_queue_msk = BIT(mvm->snif_queue);
670 int ret;
671
672 WARN_ON(vif->type != NL80211_IFTYPE_MONITOR);
673
674 iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, NULL, action);
675
676 cmd.filter_flags = cpu_to_le32(MAC_FILTER_IN_PROMISC |
677 MAC_FILTER_IN_CONTROL_AND_MGMT |
678 MAC_FILTER_IN_BEACON |
679 MAC_FILTER_IN_PROBE_REQUEST |
680 MAC_FILTER_IN_CRC32 |
681 MAC_FILTER_ACCEPT_GRP);
682 ieee80211_hw_set(mvm->hw, RX_INCLUDES_FCS);
683
684 /* Allocate sniffer station */
685 ret = iwl_mvm_allocate_int_sta(mvm, &mvm->snif_sta, tfd_queue_msk,
686 vif->type, IWL_STA_GENERAL_PURPOSE);
687 if (ret)
688 return ret;
689
690 return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd);
691 }
692
iwl_mvm_mac_ctxt_cmd_ibss(struct iwl_mvm * mvm,struct ieee80211_vif * vif,u32 action)693 static int iwl_mvm_mac_ctxt_cmd_ibss(struct iwl_mvm *mvm,
694 struct ieee80211_vif *vif,
695 u32 action)
696 {
697 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
698 struct iwl_mac_ctx_cmd cmd = {};
699
700 WARN_ON(vif->type != NL80211_IFTYPE_ADHOC);
701
702 iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, NULL, action);
703
704 cmd.filter_flags = cpu_to_le32(MAC_FILTER_IN_BEACON |
705 MAC_FILTER_IN_PROBE_REQUEST |
706 MAC_FILTER_ACCEPT_GRP);
707
708 /* cmd.ibss.beacon_time/cmd.ibss.beacon_tsf are curently ignored */
709 cmd.ibss.bi = cpu_to_le32(vif->bss_conf.beacon_int);
710
711 /* TODO: Assumes that the beacon id == mac context id */
712 cmd.ibss.beacon_template = cpu_to_le32(mvmvif->id);
713
714 return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd);
715 }
716
717 struct iwl_mvm_go_iterator_data {
718 bool go_active;
719 };
720
iwl_mvm_go_iterator(void * _data,u8 * mac,struct ieee80211_vif * vif)721 static void iwl_mvm_go_iterator(void *_data, u8 *mac, struct ieee80211_vif *vif)
722 {
723 struct iwl_mvm_go_iterator_data *data = _data;
724 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
725
726 if (vif->type == NL80211_IFTYPE_AP && vif->p2p &&
727 mvmvif->ap_ibss_active)
728 data->go_active = true;
729 }
730
iwl_mvm_mac_ctxt_cmd_p2p_device(struct iwl_mvm * mvm,struct ieee80211_vif * vif,u32 action)731 static int iwl_mvm_mac_ctxt_cmd_p2p_device(struct iwl_mvm *mvm,
732 struct ieee80211_vif *vif,
733 u32 action)
734 {
735 struct iwl_mac_ctx_cmd cmd = {};
736 struct iwl_mvm_go_iterator_data data = {};
737
738 WARN_ON(vif->type != NL80211_IFTYPE_P2P_DEVICE);
739
740 iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, NULL, action);
741
742 /* Override the filter flags to accept only probe requests */
743 cmd.filter_flags = cpu_to_le32(MAC_FILTER_IN_PROBE_REQUEST);
744
745 /*
746 * This flag should be set to true when the P2P Device is
747 * discoverable and there is at least another active P2P GO. Settings
748 * this flag will allow the P2P Device to be discoverable on other
749 * channels in addition to its listen channel.
750 * Note that this flag should not be set in other cases as it opens the
751 * Rx filters on all MAC and increases the number of interrupts.
752 */
753 ieee80211_iterate_active_interfaces_atomic(
754 mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
755 iwl_mvm_go_iterator, &data);
756
757 cmd.p2p_dev.is_disc_extended = cpu_to_le32(data.go_active ? 1 : 0);
758 return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd);
759 }
760
iwl_mvm_mac_ctxt_set_tim(struct iwl_mvm * mvm,__le32 * tim_index,__le32 * tim_size,u8 * beacon,u32 frame_size)761 void iwl_mvm_mac_ctxt_set_tim(struct iwl_mvm *mvm,
762 __le32 *tim_index, __le32 *tim_size,
763 u8 *beacon, u32 frame_size)
764 {
765 u32 tim_idx;
766 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)beacon;
767
768 /* The index is relative to frame start but we start looking at the
769 * variable-length part of the beacon. */
770 tim_idx = mgmt->u.beacon.variable - beacon;
771
772 /* Parse variable-length elements of beacon to find WLAN_EID_TIM */
773 while ((tim_idx < (frame_size - 2)) &&
774 (beacon[tim_idx] != WLAN_EID_TIM))
775 tim_idx += beacon[tim_idx+1] + 2;
776
777 /* If TIM field was found, set variables */
778 if ((tim_idx < (frame_size - 1)) && (beacon[tim_idx] == WLAN_EID_TIM)) {
779 *tim_index = cpu_to_le32(tim_idx);
780 *tim_size = cpu_to_le32((u32)beacon[tim_idx + 1]);
781 } else {
782 IWL_WARN(mvm, "Unable to find TIM Element in beacon\n");
783 }
784 }
785
iwl_mvm_find_ie_offset(u8 * beacon,u8 eid,u32 frame_size)786 static u32 iwl_mvm_find_ie_offset(u8 *beacon, u8 eid, u32 frame_size)
787 {
788 struct ieee80211_mgmt *mgmt = (void *)beacon;
789 const u8 *ie;
790
791 if (WARN_ON_ONCE(frame_size <= (mgmt->u.beacon.variable - beacon)))
792 return 0;
793
794 frame_size -= mgmt->u.beacon.variable - beacon;
795
796 ie = cfg80211_find_ie(eid, mgmt->u.beacon.variable, frame_size);
797 if (!ie)
798 return 0;
799
800 return ie - beacon;
801 }
802
iwl_mvm_mac_ctxt_get_lowest_rate(struct ieee80211_tx_info * info,struct ieee80211_vif * vif)803 u8 iwl_mvm_mac_ctxt_get_lowest_rate(struct ieee80211_tx_info *info,
804 struct ieee80211_vif *vif)
805 {
806 u8 rate;
807 if (info->band == NL80211_BAND_2GHZ && !vif->p2p)
808 rate = IWL_FIRST_CCK_RATE;
809 else
810 rate = IWL_FIRST_OFDM_RATE;
811
812 return rate;
813 }
814
iwl_mvm_mac_ctxt_set_tx(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct sk_buff * beacon,struct iwl_tx_cmd * tx)815 static void iwl_mvm_mac_ctxt_set_tx(struct iwl_mvm *mvm,
816 struct ieee80211_vif *vif,
817 struct sk_buff *beacon,
818 struct iwl_tx_cmd *tx)
819 {
820 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
821 struct ieee80211_tx_info *info;
822 u8 rate;
823 u32 tx_flags;
824
825 info = IEEE80211_SKB_CB(beacon);
826
827 /* Set up TX command fields */
828 tx->len = cpu_to_le16((u16)beacon->len);
829 tx->sta_id = mvmvif->bcast_sta.sta_id;
830 tx->life_time = cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE);
831 tx_flags = TX_CMD_FLG_SEQ_CTL | TX_CMD_FLG_TSF;
832 tx_flags |=
833 iwl_mvm_bt_coex_tx_prio(mvm, (void *)beacon->data, info, 0) <<
834 TX_CMD_FLG_BT_PRIO_POS;
835 tx->tx_flags = cpu_to_le32(tx_flags);
836
837 if (!fw_has_capa(&mvm->fw->ucode_capa,
838 IWL_UCODE_TLV_CAPA_BEACON_ANT_SELECTION))
839 iwl_mvm_toggle_tx_ant(mvm, &mvm->mgmt_last_antenna_idx);
840
841 tx->rate_n_flags =
842 cpu_to_le32(BIT(mvm->mgmt_last_antenna_idx) <<
843 RATE_MCS_ANT_POS);
844
845 rate = iwl_mvm_mac_ctxt_get_lowest_rate(info, vif);
846
847 tx->rate_n_flags |= cpu_to_le32(iwl_mvm_mac80211_idx_to_hwrate(rate));
848 if (rate == IWL_FIRST_CCK_RATE)
849 tx->rate_n_flags |= cpu_to_le32(RATE_MCS_CCK_MSK);
850
851 }
852
iwl_mvm_mac_ctxt_send_beacon_cmd(struct iwl_mvm * mvm,struct sk_buff * beacon,void * data,int len)853 int iwl_mvm_mac_ctxt_send_beacon_cmd(struct iwl_mvm *mvm,
854 struct sk_buff *beacon,
855 void *data, int len)
856 {
857 struct iwl_host_cmd cmd = {
858 .id = BEACON_TEMPLATE_CMD,
859 .flags = CMD_ASYNC,
860 };
861
862 cmd.len[0] = len;
863 cmd.data[0] = data;
864 cmd.dataflags[0] = 0;
865 cmd.len[1] = beacon->len;
866 cmd.data[1] = beacon->data;
867 cmd.dataflags[1] = IWL_HCMD_DFL_DUP;
868
869 return iwl_mvm_send_cmd(mvm, &cmd);
870 }
871
iwl_mvm_mac_ctxt_send_beacon_v6(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct sk_buff * beacon)872 static int iwl_mvm_mac_ctxt_send_beacon_v6(struct iwl_mvm *mvm,
873 struct ieee80211_vif *vif,
874 struct sk_buff *beacon)
875 {
876 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
877 struct iwl_mac_beacon_cmd_v6 beacon_cmd = {};
878
879 iwl_mvm_mac_ctxt_set_tx(mvm, vif, beacon, &beacon_cmd.tx);
880
881 beacon_cmd.template_id = cpu_to_le32((u32)mvmvif->id);
882
883 if (vif->type == NL80211_IFTYPE_AP)
884 iwl_mvm_mac_ctxt_set_tim(mvm, &beacon_cmd.tim_idx,
885 &beacon_cmd.tim_size,
886 beacon->data, beacon->len);
887
888 return iwl_mvm_mac_ctxt_send_beacon_cmd(mvm, beacon, &beacon_cmd,
889 sizeof(beacon_cmd));
890 }
891
iwl_mvm_mac_ctxt_send_beacon_v7(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct sk_buff * beacon)892 static int iwl_mvm_mac_ctxt_send_beacon_v7(struct iwl_mvm *mvm,
893 struct ieee80211_vif *vif,
894 struct sk_buff *beacon)
895 {
896 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
897 struct iwl_mac_beacon_cmd_v7 beacon_cmd = {};
898
899 iwl_mvm_mac_ctxt_set_tx(mvm, vif, beacon, &beacon_cmd.tx);
900
901 beacon_cmd.template_id = cpu_to_le32((u32)mvmvif->id);
902
903 if (vif->type == NL80211_IFTYPE_AP)
904 iwl_mvm_mac_ctxt_set_tim(mvm, &beacon_cmd.tim_idx,
905 &beacon_cmd.tim_size,
906 beacon->data, beacon->len);
907
908 beacon_cmd.csa_offset =
909 cpu_to_le32(iwl_mvm_find_ie_offset(beacon->data,
910 WLAN_EID_CHANNEL_SWITCH,
911 beacon->len));
912 beacon_cmd.ecsa_offset =
913 cpu_to_le32(iwl_mvm_find_ie_offset(beacon->data,
914 WLAN_EID_EXT_CHANSWITCH_ANN,
915 beacon->len));
916
917 return iwl_mvm_mac_ctxt_send_beacon_cmd(mvm, beacon, &beacon_cmd,
918 sizeof(beacon_cmd));
919 }
920
iwl_mvm_mac_ctxt_send_beacon_v9(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct sk_buff * beacon)921 static int iwl_mvm_mac_ctxt_send_beacon_v9(struct iwl_mvm *mvm,
922 struct ieee80211_vif *vif,
923 struct sk_buff *beacon)
924 {
925 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
926 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(beacon);
927 struct iwl_mac_beacon_cmd beacon_cmd = {};
928 u8 rate = iwl_mvm_mac_ctxt_get_lowest_rate(info, vif);
929 u16 flags;
930 struct ieee80211_chanctx_conf *ctx;
931 int channel;
932
933 flags = iwl_mvm_mac80211_idx_to_hwrate(rate);
934
935 if (rate == IWL_FIRST_CCK_RATE)
936 flags |= IWL_MAC_BEACON_CCK;
937
938 /* Enable FILS on PSC channels only */
939 rcu_read_lock();
940 ctx = rcu_dereference(vif->chanctx_conf);
941 channel = ieee80211_frequency_to_channel(ctx->def.chan->center_freq);
942 WARN_ON(channel == 0);
943 if (cfg80211_channel_is_psc(ctx->def.chan) &&
944 !IWL_MVM_DISABLE_AP_FILS) {
945 flags |= IWL_MAC_BEACON_FILS;
946 beacon_cmd.short_ssid =
947 cpu_to_le32(~crc32_le(~0, vif->bss_conf.ssid,
948 vif->bss_conf.ssid_len));
949 }
950 rcu_read_unlock();
951
952 beacon_cmd.flags = cpu_to_le16(flags);
953 beacon_cmd.byte_cnt = cpu_to_le16((u16)beacon->len);
954 beacon_cmd.template_id = cpu_to_le32((u32)mvmvif->id);
955
956 if (vif->type == NL80211_IFTYPE_AP)
957 iwl_mvm_mac_ctxt_set_tim(mvm, &beacon_cmd.tim_idx,
958 &beacon_cmd.tim_size,
959 beacon->data, beacon->len);
960
961 beacon_cmd.csa_offset =
962 cpu_to_le32(iwl_mvm_find_ie_offset(beacon->data,
963 WLAN_EID_CHANNEL_SWITCH,
964 beacon->len));
965 beacon_cmd.ecsa_offset =
966 cpu_to_le32(iwl_mvm_find_ie_offset(beacon->data,
967 WLAN_EID_EXT_CHANSWITCH_ANN,
968 beacon->len));
969
970 return iwl_mvm_mac_ctxt_send_beacon_cmd(mvm, beacon, &beacon_cmd,
971 sizeof(beacon_cmd));
972 }
973
iwl_mvm_mac_ctxt_send_beacon(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct sk_buff * beacon)974 int iwl_mvm_mac_ctxt_send_beacon(struct iwl_mvm *mvm,
975 struct ieee80211_vif *vif,
976 struct sk_buff *beacon)
977 {
978 if (WARN_ON(!beacon))
979 return -EINVAL;
980
981 if (IWL_MVM_NON_TRANSMITTING_AP)
982 return 0;
983
984 if (!fw_has_capa(&mvm->fw->ucode_capa,
985 IWL_UCODE_TLV_CAPA_CSA_AND_TBTT_OFFLOAD))
986 return iwl_mvm_mac_ctxt_send_beacon_v6(mvm, vif, beacon);
987
988 if (fw_has_api(&mvm->fw->ucode_capa,
989 IWL_UCODE_TLV_API_NEW_BEACON_TEMPLATE))
990 return iwl_mvm_mac_ctxt_send_beacon_v9(mvm, vif, beacon);
991
992 return iwl_mvm_mac_ctxt_send_beacon_v7(mvm, vif, beacon);
993 }
994
995 /* The beacon template for the AP/GO/IBSS has changed and needs update */
iwl_mvm_mac_ctxt_beacon_changed(struct iwl_mvm * mvm,struct ieee80211_vif * vif)996 int iwl_mvm_mac_ctxt_beacon_changed(struct iwl_mvm *mvm,
997 struct ieee80211_vif *vif)
998 {
999 struct sk_buff *beacon;
1000 int ret;
1001
1002 WARN_ON(vif->type != NL80211_IFTYPE_AP &&
1003 vif->type != NL80211_IFTYPE_ADHOC);
1004
1005 beacon = ieee80211_beacon_get_template(mvm->hw, vif, NULL);
1006 if (!beacon)
1007 return -ENOMEM;
1008
1009 #ifdef CONFIG_IWLWIFI_DEBUGFS
1010 if (mvm->beacon_inject_active) {
1011 dev_kfree_skb(beacon);
1012 return -EBUSY;
1013 }
1014 #endif
1015
1016 ret = iwl_mvm_mac_ctxt_send_beacon(mvm, vif, beacon);
1017 dev_kfree_skb(beacon);
1018 return ret;
1019 }
1020
1021 struct iwl_mvm_mac_ap_iterator_data {
1022 struct iwl_mvm *mvm;
1023 struct ieee80211_vif *vif;
1024 u32 beacon_device_ts;
1025 u16 beacon_int;
1026 };
1027
1028 /* Find the beacon_device_ts and beacon_int for a managed interface */
iwl_mvm_mac_ap_iterator(void * _data,u8 * mac,struct ieee80211_vif * vif)1029 static void iwl_mvm_mac_ap_iterator(void *_data, u8 *mac,
1030 struct ieee80211_vif *vif)
1031 {
1032 struct iwl_mvm_mac_ap_iterator_data *data = _data;
1033
1034 if (vif->type != NL80211_IFTYPE_STATION || !vif->bss_conf.assoc)
1035 return;
1036
1037 /* Station client has higher priority over P2P client*/
1038 if (vif->p2p && data->beacon_device_ts)
1039 return;
1040
1041 data->beacon_device_ts = vif->bss_conf.sync_device_ts;
1042 data->beacon_int = vif->bss_conf.beacon_int;
1043 }
1044
1045 /*
1046 * Fill the specific data for mac context of type AP of P2P GO
1047 */
iwl_mvm_mac_ctxt_cmd_fill_ap(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct iwl_mac_ctx_cmd * cmd,struct iwl_mac_data_ap * ctxt_ap,bool add)1048 static void iwl_mvm_mac_ctxt_cmd_fill_ap(struct iwl_mvm *mvm,
1049 struct ieee80211_vif *vif,
1050 struct iwl_mac_ctx_cmd *cmd,
1051 struct iwl_mac_data_ap *ctxt_ap,
1052 bool add)
1053 {
1054 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1055 struct iwl_mvm_mac_ap_iterator_data data = {
1056 .mvm = mvm,
1057 .vif = vif,
1058 .beacon_device_ts = 0
1059 };
1060
1061 /* in AP mode, the MCAST FIFO takes the EDCA params from VO */
1062 cmd->ac[IWL_MVM_TX_FIFO_VO].fifos_mask |= BIT(IWL_MVM_TX_FIFO_MCAST);
1063
1064 /*
1065 * in AP mode, pass probe requests and beacons from other APs
1066 * (needed for ht protection); when there're no any associated
1067 * station don't ask FW to pass beacons to prevent unnecessary
1068 * wake-ups.
1069 */
1070 cmd->filter_flags |= cpu_to_le32(MAC_FILTER_IN_PROBE_REQUEST);
1071 if (mvmvif->ap_assoc_sta_count || !mvm->drop_bcn_ap_mode) {
1072 cmd->filter_flags |= cpu_to_le32(MAC_FILTER_IN_BEACON);
1073 IWL_DEBUG_HC(mvm, "Asking FW to pass beacons\n");
1074 } else {
1075 IWL_DEBUG_HC(mvm, "No need to receive beacons\n");
1076 }
1077
1078 ctxt_ap->bi = cpu_to_le32(vif->bss_conf.beacon_int);
1079 ctxt_ap->dtim_interval = cpu_to_le32(vif->bss_conf.beacon_int *
1080 vif->bss_conf.dtim_period);
1081
1082 if (!fw_has_api(&mvm->fw->ucode_capa,
1083 IWL_UCODE_TLV_API_STA_TYPE))
1084 ctxt_ap->mcast_qid = cpu_to_le32(mvmvif->cab_queue);
1085
1086 /*
1087 * Only set the beacon time when the MAC is being added, when we
1088 * just modify the MAC then we should keep the time -- the firmware
1089 * can otherwise have a "jumping" TBTT.
1090 */
1091 if (add) {
1092 /*
1093 * If there is a station/P2P client interface which is
1094 * associated, set the AP's TBTT far enough from the station's
1095 * TBTT. Otherwise, set it to the current system time
1096 */
1097 ieee80211_iterate_active_interfaces_atomic(
1098 mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
1099 iwl_mvm_mac_ap_iterator, &data);
1100
1101 if (data.beacon_device_ts) {
1102 u32 rand = (prandom_u32() % (64 - 36)) + 36;
1103 mvmvif->ap_beacon_time = data.beacon_device_ts +
1104 ieee80211_tu_to_usec(data.beacon_int * rand /
1105 100);
1106 } else {
1107 mvmvif->ap_beacon_time = iwl_mvm_get_systime(mvm);
1108 }
1109 }
1110
1111 ctxt_ap->beacon_time = cpu_to_le32(mvmvif->ap_beacon_time);
1112 ctxt_ap->beacon_tsf = 0; /* unused */
1113
1114 /* TODO: Assume that the beacon id == mac context id */
1115 ctxt_ap->beacon_template = cpu_to_le32(mvmvif->id);
1116 }
1117
iwl_mvm_mac_ctxt_cmd_ap(struct iwl_mvm * mvm,struct ieee80211_vif * vif,u32 action)1118 static int iwl_mvm_mac_ctxt_cmd_ap(struct iwl_mvm *mvm,
1119 struct ieee80211_vif *vif,
1120 u32 action)
1121 {
1122 struct iwl_mac_ctx_cmd cmd = {};
1123
1124 WARN_ON(vif->type != NL80211_IFTYPE_AP || vif->p2p);
1125
1126 /* Fill the common data for all mac context types */
1127 iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, NULL, action);
1128
1129 /* Fill the data specific for ap mode */
1130 iwl_mvm_mac_ctxt_cmd_fill_ap(mvm, vif, &cmd, &cmd.ap,
1131 action == FW_CTXT_ACTION_ADD);
1132
1133 return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd);
1134 }
1135
iwl_mvm_mac_ctxt_cmd_go(struct iwl_mvm * mvm,struct ieee80211_vif * vif,u32 action)1136 static int iwl_mvm_mac_ctxt_cmd_go(struct iwl_mvm *mvm,
1137 struct ieee80211_vif *vif,
1138 u32 action)
1139 {
1140 struct iwl_mac_ctx_cmd cmd = {};
1141 struct ieee80211_p2p_noa_attr *noa = &vif->bss_conf.p2p_noa_attr;
1142
1143 WARN_ON(vif->type != NL80211_IFTYPE_AP || !vif->p2p);
1144
1145 /* Fill the common data for all mac context types */
1146 iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, NULL, action);
1147
1148 /* Fill the data specific for GO mode */
1149 iwl_mvm_mac_ctxt_cmd_fill_ap(mvm, vif, &cmd, &cmd.go.ap,
1150 action == FW_CTXT_ACTION_ADD);
1151
1152 cmd.go.ctwin = cpu_to_le32(noa->oppps_ctwindow &
1153 IEEE80211_P2P_OPPPS_CTWINDOW_MASK);
1154 cmd.go.opp_ps_enabled =
1155 cpu_to_le32(!!(noa->oppps_ctwindow &
1156 IEEE80211_P2P_OPPPS_ENABLE_BIT));
1157
1158 return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd);
1159 }
1160
iwl_mvm_mac_ctx_send(struct iwl_mvm * mvm,struct ieee80211_vif * vif,u32 action,bool force_assoc_off,const u8 * bssid_override)1161 static int iwl_mvm_mac_ctx_send(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1162 u32 action, bool force_assoc_off,
1163 const u8 *bssid_override)
1164 {
1165 switch (vif->type) {
1166 case NL80211_IFTYPE_STATION:
1167 return iwl_mvm_mac_ctxt_cmd_sta(mvm, vif, action,
1168 force_assoc_off,
1169 bssid_override);
1170 case NL80211_IFTYPE_AP:
1171 if (!vif->p2p)
1172 return iwl_mvm_mac_ctxt_cmd_ap(mvm, vif, action);
1173 else
1174 return iwl_mvm_mac_ctxt_cmd_go(mvm, vif, action);
1175 case NL80211_IFTYPE_MONITOR:
1176 return iwl_mvm_mac_ctxt_cmd_listener(mvm, vif, action);
1177 case NL80211_IFTYPE_P2P_DEVICE:
1178 return iwl_mvm_mac_ctxt_cmd_p2p_device(mvm, vif, action);
1179 case NL80211_IFTYPE_ADHOC:
1180 return iwl_mvm_mac_ctxt_cmd_ibss(mvm, vif, action);
1181 default:
1182 break;
1183 }
1184
1185 return -EOPNOTSUPP;
1186 }
1187
iwl_mvm_mac_ctxt_add(struct iwl_mvm * mvm,struct ieee80211_vif * vif)1188 int iwl_mvm_mac_ctxt_add(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1189 {
1190 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1191 int ret;
1192
1193 if (WARN_ONCE(mvmvif->uploaded, "Adding active MAC %pM/%d\n",
1194 vif->addr, ieee80211_vif_type_p2p(vif)))
1195 return -EIO;
1196
1197 ret = iwl_mvm_mac_ctx_send(mvm, vif, FW_CTXT_ACTION_ADD,
1198 true, NULL);
1199 if (ret)
1200 return ret;
1201
1202 /* will only do anything at resume from D3 time */
1203 iwl_mvm_set_last_nonqos_seq(mvm, vif);
1204
1205 mvmvif->uploaded = true;
1206 return 0;
1207 }
1208
iwl_mvm_mac_ctxt_changed(struct iwl_mvm * mvm,struct ieee80211_vif * vif,bool force_assoc_off,const u8 * bssid_override)1209 int iwl_mvm_mac_ctxt_changed(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1210 bool force_assoc_off, const u8 *bssid_override)
1211 {
1212 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1213
1214 if (WARN_ONCE(!mvmvif->uploaded, "Changing inactive MAC %pM/%d\n",
1215 vif->addr, ieee80211_vif_type_p2p(vif)))
1216 return -EIO;
1217
1218 return iwl_mvm_mac_ctx_send(mvm, vif, FW_CTXT_ACTION_MODIFY,
1219 force_assoc_off, bssid_override);
1220 }
1221
iwl_mvm_mac_ctxt_remove(struct iwl_mvm * mvm,struct ieee80211_vif * vif)1222 int iwl_mvm_mac_ctxt_remove(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1223 {
1224 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1225 struct iwl_mac_ctx_cmd cmd;
1226 int ret;
1227
1228 if (WARN_ONCE(!mvmvif->uploaded, "Removing inactive MAC %pM/%d\n",
1229 vif->addr, ieee80211_vif_type_p2p(vif)))
1230 return -EIO;
1231
1232 memset(&cmd, 0, sizeof(cmd));
1233
1234 cmd.id_and_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id,
1235 mvmvif->color));
1236 cmd.action = cpu_to_le32(FW_CTXT_ACTION_REMOVE);
1237
1238 ret = iwl_mvm_send_cmd_pdu(mvm, MAC_CONTEXT_CMD, 0,
1239 sizeof(cmd), &cmd);
1240 if (ret) {
1241 IWL_ERR(mvm, "Failed to remove MAC context: %d\n", ret);
1242 return ret;
1243 }
1244
1245 mvmvif->uploaded = false;
1246
1247 if (vif->type == NL80211_IFTYPE_MONITOR) {
1248 __clear_bit(IEEE80211_HW_RX_INCLUDES_FCS, mvm->hw->flags);
1249 iwl_mvm_dealloc_snif_sta(mvm);
1250 }
1251
1252 return 0;
1253 }
1254
iwl_mvm_csa_count_down(struct iwl_mvm * mvm,struct ieee80211_vif * csa_vif,u32 gp2,bool tx_success)1255 static void iwl_mvm_csa_count_down(struct iwl_mvm *mvm,
1256 struct ieee80211_vif *csa_vif, u32 gp2,
1257 bool tx_success)
1258 {
1259 struct iwl_mvm_vif *mvmvif =
1260 iwl_mvm_vif_from_mac80211(csa_vif);
1261
1262 /* Don't start to countdown from a failed beacon */
1263 if (!tx_success && !mvmvif->csa_countdown)
1264 return;
1265
1266 mvmvif->csa_countdown = true;
1267
1268 if (!ieee80211_beacon_cntdwn_is_complete(csa_vif)) {
1269 int c = ieee80211_beacon_update_cntdwn(csa_vif);
1270
1271 iwl_mvm_mac_ctxt_beacon_changed(mvm, csa_vif);
1272 if (csa_vif->p2p &&
1273 !iwl_mvm_te_scheduled(&mvmvif->time_event_data) && gp2 &&
1274 tx_success) {
1275 u32 rel_time = (c + 1) *
1276 csa_vif->bss_conf.beacon_int -
1277 IWL_MVM_CHANNEL_SWITCH_TIME_GO;
1278 u32 apply_time = gp2 + rel_time * 1024;
1279
1280 iwl_mvm_schedule_csa_period(mvm, csa_vif,
1281 IWL_MVM_CHANNEL_SWITCH_TIME_GO -
1282 IWL_MVM_CHANNEL_SWITCH_MARGIN,
1283 apply_time);
1284 }
1285 } else if (!iwl_mvm_te_scheduled(&mvmvif->time_event_data)) {
1286 /* we don't have CSA NoA scheduled yet, switch now */
1287 ieee80211_csa_finish(csa_vif);
1288 RCU_INIT_POINTER(mvm->csa_vif, NULL);
1289 }
1290 }
1291
iwl_mvm_rx_beacon_notif(struct iwl_mvm * mvm,struct iwl_rx_cmd_buffer * rxb)1292 void iwl_mvm_rx_beacon_notif(struct iwl_mvm *mvm,
1293 struct iwl_rx_cmd_buffer *rxb)
1294 {
1295 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1296 unsigned int pkt_len = iwl_rx_packet_payload_len(pkt);
1297 struct iwl_extended_beacon_notif *beacon = (void *)pkt->data;
1298 struct iwl_extended_beacon_notif_v5 *beacon_v5 = (void *)pkt->data;
1299 struct ieee80211_vif *csa_vif;
1300 struct ieee80211_vif *tx_blocked_vif;
1301 struct agg_tx_status *agg_status;
1302 u16 status;
1303
1304 lockdep_assert_held(&mvm->mutex);
1305
1306 mvm->ap_last_beacon_gp2 = le32_to_cpu(beacon->gp2);
1307
1308 if (!iwl_mvm_is_short_beacon_notif_supported(mvm)) {
1309 struct iwl_mvm_tx_resp *beacon_notify_hdr =
1310 &beacon_v5->beacon_notify_hdr;
1311
1312 if (unlikely(pkt_len < sizeof(*beacon_v5)))
1313 return;
1314
1315 mvm->ibss_manager = beacon_v5->ibss_mgr_status != 0;
1316 agg_status = iwl_mvm_get_agg_status(mvm, beacon_notify_hdr);
1317 status = le16_to_cpu(agg_status->status) & TX_STATUS_MSK;
1318 IWL_DEBUG_RX(mvm,
1319 "beacon status %#x retries:%d tsf:0x%016llX gp2:0x%X rate:%d\n",
1320 status, beacon_notify_hdr->failure_frame,
1321 le64_to_cpu(beacon->tsf),
1322 mvm->ap_last_beacon_gp2,
1323 le32_to_cpu(beacon_notify_hdr->initial_rate));
1324 } else {
1325 if (unlikely(pkt_len < sizeof(*beacon)))
1326 return;
1327
1328 mvm->ibss_manager = beacon->ibss_mgr_status != 0;
1329 status = le32_to_cpu(beacon->status) & TX_STATUS_MSK;
1330 IWL_DEBUG_RX(mvm,
1331 "beacon status %#x tsf:0x%016llX gp2:0x%X\n",
1332 status, le64_to_cpu(beacon->tsf),
1333 mvm->ap_last_beacon_gp2);
1334 }
1335
1336 csa_vif = rcu_dereference_protected(mvm->csa_vif,
1337 lockdep_is_held(&mvm->mutex));
1338 if (unlikely(csa_vif && csa_vif->csa_active))
1339 iwl_mvm_csa_count_down(mvm, csa_vif, mvm->ap_last_beacon_gp2,
1340 (status == TX_STATUS_SUCCESS));
1341
1342 tx_blocked_vif = rcu_dereference_protected(mvm->csa_tx_blocked_vif,
1343 lockdep_is_held(&mvm->mutex));
1344 if (unlikely(tx_blocked_vif)) {
1345 struct iwl_mvm_vif *mvmvif =
1346 iwl_mvm_vif_from_mac80211(tx_blocked_vif);
1347
1348 /*
1349 * The channel switch is started and we have blocked the
1350 * stations. If this is the first beacon (the timeout wasn't
1351 * set), set the unblock timeout, otherwise countdown
1352 */
1353 if (!mvm->csa_tx_block_bcn_timeout)
1354 mvm->csa_tx_block_bcn_timeout =
1355 IWL_MVM_CS_UNBLOCK_TX_TIMEOUT;
1356 else
1357 mvm->csa_tx_block_bcn_timeout--;
1358
1359 /* Check if the timeout is expired, and unblock tx */
1360 if (mvm->csa_tx_block_bcn_timeout == 0) {
1361 iwl_mvm_modify_all_sta_disable_tx(mvm, mvmvif, false);
1362 RCU_INIT_POINTER(mvm->csa_tx_blocked_vif, NULL);
1363 }
1364 }
1365 }
1366
iwl_mvm_rx_missed_beacons_notif(struct iwl_mvm * mvm,struct iwl_rx_cmd_buffer * rxb)1367 void iwl_mvm_rx_missed_beacons_notif(struct iwl_mvm *mvm,
1368 struct iwl_rx_cmd_buffer *rxb)
1369 {
1370 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1371 struct iwl_missed_beacons_notif *mb = (void *)pkt->data;
1372 struct iwl_fw_dbg_trigger_missed_bcon *bcon_trig;
1373 struct iwl_fw_dbg_trigger_tlv *trigger;
1374 u32 stop_trig_missed_bcon, stop_trig_missed_bcon_since_rx;
1375 u32 rx_missed_bcon, rx_missed_bcon_since_rx;
1376 struct ieee80211_vif *vif;
1377 u32 id = le32_to_cpu(mb->mac_id);
1378 union iwl_dbg_tlv_tp_data tp_data = { .fw_pkt = pkt };
1379
1380 IWL_DEBUG_INFO(mvm,
1381 "missed bcn mac_id=%u, consecutive=%u (%u, %u, %u)\n",
1382 le32_to_cpu(mb->mac_id),
1383 le32_to_cpu(mb->consec_missed_beacons),
1384 le32_to_cpu(mb->consec_missed_beacons_since_last_rx),
1385 le32_to_cpu(mb->num_recvd_beacons),
1386 le32_to_cpu(mb->num_expected_beacons));
1387
1388 rcu_read_lock();
1389
1390 vif = iwl_mvm_rcu_dereference_vif_id(mvm, id, true);
1391 if (!vif)
1392 goto out;
1393
1394 rx_missed_bcon = le32_to_cpu(mb->consec_missed_beacons);
1395 rx_missed_bcon_since_rx =
1396 le32_to_cpu(mb->consec_missed_beacons_since_last_rx);
1397 /*
1398 * TODO: the threshold should be adjusted based on latency conditions,
1399 * and/or in case of a CS flow on one of the other AP vifs.
1400 */
1401 if (rx_missed_bcon > IWL_MVM_MISSED_BEACONS_THRESHOLD_LONG)
1402 iwl_mvm_connection_loss(mvm, vif, "missed beacons");
1403 else if (rx_missed_bcon_since_rx > IWL_MVM_MISSED_BEACONS_THRESHOLD)
1404 ieee80211_beacon_loss(vif);
1405
1406 iwl_dbg_tlv_time_point(&mvm->fwrt,
1407 IWL_FW_INI_TIME_POINT_MISSED_BEACONS, &tp_data);
1408
1409 trigger = iwl_fw_dbg_trigger_on(&mvm->fwrt, ieee80211_vif_to_wdev(vif),
1410 FW_DBG_TRIGGER_MISSED_BEACONS);
1411 if (!trigger)
1412 goto out;
1413
1414 bcon_trig = (void *)trigger->data;
1415 stop_trig_missed_bcon = le32_to_cpu(bcon_trig->stop_consec_missed_bcon);
1416 stop_trig_missed_bcon_since_rx =
1417 le32_to_cpu(bcon_trig->stop_consec_missed_bcon_since_rx);
1418
1419 /* TODO: implement start trigger */
1420
1421 if (rx_missed_bcon_since_rx >= stop_trig_missed_bcon_since_rx ||
1422 rx_missed_bcon >= stop_trig_missed_bcon)
1423 iwl_fw_dbg_collect_trig(&mvm->fwrt, trigger, NULL);
1424
1425 out:
1426 rcu_read_unlock();
1427 }
1428
iwl_mvm_rx_stored_beacon_notif(struct iwl_mvm * mvm,struct iwl_rx_cmd_buffer * rxb)1429 void iwl_mvm_rx_stored_beacon_notif(struct iwl_mvm *mvm,
1430 struct iwl_rx_cmd_buffer *rxb)
1431 {
1432 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1433 unsigned int pkt_len = iwl_rx_packet_payload_len(pkt);
1434 struct iwl_stored_beacon_notif_common *sb = (void *)pkt->data;
1435 struct ieee80211_rx_status rx_status;
1436 struct sk_buff *skb;
1437 u8 *data;
1438 u32 size = le32_to_cpu(sb->byte_count);
1439 int ver = iwl_fw_lookup_cmd_ver(mvm->fw, PROT_OFFLOAD_GROUP,
1440 STORED_BEACON_NTF, 0);
1441
1442 if (size == 0)
1443 return;
1444
1445 /* handle per-version differences */
1446 if (ver <= 2) {
1447 struct iwl_stored_beacon_notif_v2 *sb_v2 = (void *)pkt->data;
1448
1449 if (pkt_len < struct_size(sb_v2, data, size))
1450 return;
1451
1452 data = sb_v2->data;
1453 } else {
1454 struct iwl_stored_beacon_notif_v3 *sb_v3 = (void *)pkt->data;
1455
1456 if (pkt_len < struct_size(sb_v3, data, size))
1457 return;
1458
1459 data = sb_v3->data;
1460 }
1461
1462 skb = alloc_skb(size, GFP_ATOMIC);
1463 if (!skb) {
1464 IWL_ERR(mvm, "alloc_skb failed\n");
1465 return;
1466 }
1467
1468 /* update rx_status according to the notification's metadata */
1469 memset(&rx_status, 0, sizeof(rx_status));
1470 rx_status.mactime = le64_to_cpu(sb->tsf);
1471 /* TSF as indicated by the firmware is at INA time */
1472 rx_status.flag |= RX_FLAG_MACTIME_PLCP_START;
1473 rx_status.device_timestamp = le32_to_cpu(sb->system_time);
1474 rx_status.band =
1475 (sb->band & cpu_to_le16(RX_RES_PHY_FLAGS_BAND_24)) ?
1476 NL80211_BAND_2GHZ : NL80211_BAND_5GHZ;
1477 rx_status.freq =
1478 ieee80211_channel_to_frequency(le16_to_cpu(sb->channel),
1479 rx_status.band);
1480
1481 /* copy the data */
1482 skb_put_data(skb, data, size);
1483 memcpy(IEEE80211_SKB_RXCB(skb), &rx_status, sizeof(rx_status));
1484
1485 /* pass it as regular rx to mac80211 */
1486 ieee80211_rx_napi(mvm->hw, NULL, skb, NULL);
1487 }
1488
iwl_mvm_probe_resp_data_notif(struct iwl_mvm * mvm,struct iwl_rx_cmd_buffer * rxb)1489 void iwl_mvm_probe_resp_data_notif(struct iwl_mvm *mvm,
1490 struct iwl_rx_cmd_buffer *rxb)
1491 {
1492 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1493 struct iwl_probe_resp_data_notif *notif = (void *)pkt->data;
1494 struct iwl_probe_resp_data *old_data, *new_data;
1495 u32 id = le32_to_cpu(notif->mac_id);
1496 struct ieee80211_vif *vif;
1497 struct iwl_mvm_vif *mvmvif;
1498
1499 IWL_DEBUG_INFO(mvm, "Probe response data notif: noa %d, csa %d\n",
1500 notif->noa_active, notif->csa_counter);
1501
1502 vif = iwl_mvm_rcu_dereference_vif_id(mvm, id, false);
1503 if (!vif)
1504 return;
1505
1506 mvmvif = iwl_mvm_vif_from_mac80211(vif);
1507
1508 new_data = kzalloc(sizeof(*new_data), GFP_KERNEL);
1509 if (!new_data)
1510 return;
1511
1512 memcpy(&new_data->notif, notif, sizeof(new_data->notif));
1513
1514 /* noa_attr contains 1 reserved byte, need to substruct it */
1515 new_data->noa_len = sizeof(struct ieee80211_vendor_ie) +
1516 sizeof(new_data->notif.noa_attr) - 1;
1517
1518 /*
1519 * If it's a one time NoA, only one descriptor is needed,
1520 * adjust the length according to len_low.
1521 */
1522 if (new_data->notif.noa_attr.len_low ==
1523 sizeof(struct ieee80211_p2p_noa_desc) + 2)
1524 new_data->noa_len -= sizeof(struct ieee80211_p2p_noa_desc);
1525
1526 old_data = rcu_dereference_protected(mvmvif->probe_resp_data,
1527 lockdep_is_held(&mvmvif->mvm->mutex));
1528 rcu_assign_pointer(mvmvif->probe_resp_data, new_data);
1529
1530 if (old_data)
1531 kfree_rcu(old_data, rcu_head);
1532
1533 if (notif->csa_counter != IWL_PROBE_RESP_DATA_NO_CSA &&
1534 notif->csa_counter >= 1)
1535 ieee80211_beacon_set_cntdwn(vif, notif->csa_counter);
1536 }
1537
iwl_mvm_channel_switch_noa_notif(struct iwl_mvm * mvm,struct iwl_rx_cmd_buffer * rxb)1538 void iwl_mvm_channel_switch_noa_notif(struct iwl_mvm *mvm,
1539 struct iwl_rx_cmd_buffer *rxb)
1540 {
1541 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1542 struct iwl_channel_switch_noa_notif *notif = (void *)pkt->data;
1543 struct ieee80211_vif *csa_vif, *vif;
1544 struct iwl_mvm_vif *mvmvif;
1545 u32 id_n_color, csa_id, mac_id;
1546
1547 id_n_color = le32_to_cpu(notif->id_and_color);
1548 mac_id = id_n_color & FW_CTXT_ID_MSK;
1549
1550 if (WARN_ON_ONCE(mac_id >= NUM_MAC_INDEX_DRIVER))
1551 return;
1552
1553 rcu_read_lock();
1554 vif = rcu_dereference(mvm->vif_id_to_mac[mac_id]);
1555 mvmvif = iwl_mvm_vif_from_mac80211(vif);
1556
1557 switch (vif->type) {
1558 case NL80211_IFTYPE_AP:
1559 csa_vif = rcu_dereference(mvm->csa_vif);
1560 if (WARN_ON(!csa_vif || !csa_vif->csa_active ||
1561 csa_vif != vif))
1562 goto out_unlock;
1563
1564 csa_id = FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color);
1565 if (WARN(csa_id != id_n_color,
1566 "channel switch noa notification on unexpected vif (csa_vif=%d, notif=%d)",
1567 csa_id, id_n_color))
1568 goto out_unlock;
1569
1570 IWL_DEBUG_INFO(mvm, "Channel Switch Started Notification\n");
1571
1572 schedule_delayed_work(&mvm->cs_tx_unblock_dwork,
1573 msecs_to_jiffies(IWL_MVM_CS_UNBLOCK_TX_TIMEOUT *
1574 csa_vif->bss_conf.beacon_int));
1575
1576 ieee80211_csa_finish(csa_vif);
1577
1578 rcu_read_unlock();
1579
1580 RCU_INIT_POINTER(mvm->csa_vif, NULL);
1581 return;
1582 case NL80211_IFTYPE_STATION:
1583 iwl_mvm_csa_client_absent(mvm, vif);
1584 cancel_delayed_work(&mvmvif->csa_work);
1585 ieee80211_chswitch_done(vif, true);
1586 break;
1587 default:
1588 /* should never happen */
1589 WARN_ON_ONCE(1);
1590 break;
1591 }
1592 out_unlock:
1593 rcu_read_unlock();
1594 }
1595
iwl_mvm_rx_missed_vap_notif(struct iwl_mvm * mvm,struct iwl_rx_cmd_buffer * rxb)1596 void iwl_mvm_rx_missed_vap_notif(struct iwl_mvm *mvm,
1597 struct iwl_rx_cmd_buffer *rxb)
1598 {
1599 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1600 struct iwl_missed_vap_notif *mb = (void *)pkt->data;
1601 struct ieee80211_vif *vif;
1602 u32 id = le32_to_cpu(mb->mac_id);
1603
1604 IWL_DEBUG_INFO(mvm,
1605 "missed_vap notify mac_id=%u, num_beacon_intervals_elapsed=%u, profile_periodicity=%u\n",
1606 le32_to_cpu(mb->mac_id),
1607 mb->num_beacon_intervals_elapsed,
1608 mb->profile_periodicity);
1609
1610 rcu_read_lock();
1611
1612 vif = iwl_mvm_rcu_dereference_vif_id(mvm, id, true);
1613 if (vif)
1614 iwl_mvm_connection_loss(mvm, vif, "missed vap beacon");
1615
1616 rcu_read_unlock();
1617 }
1618
