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WIP FPC-III support
[linux/fpc-iii.git] / drivers / net / wireless / intel / iwlwifi / mvm / ftm-initiator.c
bloba4fd0bf9ba19622d25f9cf81b3a2ffb18bebb85e
1 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
2 /*
3 * Copyright (C) 2015-2017 Intel Deutschland GmbH
4 * Copyright (C) 2018-2020 Intel Corporation
5 */
6 #include <linux/etherdevice.h>
7 #include <linux/math64.h>
8 #include <net/cfg80211.h>
9 #include "mvm.h"
10 #include "iwl-io.h"
11 #include "iwl-prph.h"
12 #include "constants.h"
13
14 struct iwl_mvm_loc_entry {
15 struct list_head list;
16 u8 addr[ETH_ALEN];
17 u8 lci_len, civic_len;
18 u8 buf[];
19 };
20
21 struct iwl_mvm_smooth_entry {
22 struct list_head list;
23 u8 addr[ETH_ALEN];
24 s64 rtt_avg;
25 u64 host_time;
26 };
27
28 struct iwl_mvm_ftm_pasn_entry {
29 struct list_head list;
30 u8 addr[ETH_ALEN];
31 u8 hltk[HLTK_11AZ_LEN];
32 u8 tk[TK_11AZ_LEN];
33 u8 cipher;
34 u8 tx_pn[IEEE80211_CCMP_PN_LEN];
35 u8 rx_pn[IEEE80211_CCMP_PN_LEN];
36 };
37
38 int iwl_mvm_ftm_add_pasn_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
39 u8 *addr, u32 cipher, u8 *tk, u32 tk_len,
40 u8 *hltk, u32 hltk_len)
41 {
42 struct iwl_mvm_ftm_pasn_entry *pasn = kzalloc(sizeof(*pasn),
43 GFP_KERNEL);
44 u32 expected_tk_len;
45
46 lockdep_assert_held(&mvm->mutex);
47
48 if (!pasn)
49 return -ENOBUFS;
50
51 pasn->cipher = iwl_mvm_cipher_to_location_cipher(cipher);
52
53 switch (pasn->cipher) {
54 case IWL_LOCATION_CIPHER_CCMP_128:
55 case IWL_LOCATION_CIPHER_GCMP_128:
56 expected_tk_len = WLAN_KEY_LEN_CCMP;
57 break;
58 case IWL_LOCATION_CIPHER_GCMP_256:
59 expected_tk_len = WLAN_KEY_LEN_GCMP_256;
60 break;
61 default:
62 goto out;
63 }
64
65 /*
66 * If associated to this AP and already have security context,
67 * the TK is already configured for this station, so it
68 * shouldn't be set again here.
69 */
70 if (vif->bss_conf.assoc &&
71 !memcmp(addr, vif->bss_conf.bssid, ETH_ALEN)) {
72 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
73 struct ieee80211_sta *sta;
74
75 rcu_read_lock();
76 sta = rcu_dereference(mvm->fw_id_to_mac_id[mvmvif->ap_sta_id]);
77 if (!IS_ERR_OR_NULL(sta) && sta->mfp)
78 expected_tk_len = 0;
79 rcu_read_unlock();
80 }
81
82 if (tk_len != expected_tk_len || hltk_len != sizeof(pasn->hltk)) {
83 IWL_ERR(mvm, "Invalid key length: tk_len=%u hltk_len=%u\n",
84 tk_len, hltk_len);
85 goto out;
86 }
87
88 memcpy(pasn->addr, addr, sizeof(pasn->addr));
89 memcpy(pasn->hltk, hltk, sizeof(pasn->hltk));
90
91 if (tk && tk_len)
92 memcpy(pasn->tk, tk, sizeof(pasn->tk));
93
94 list_add_tail(&pasn->list, &mvm->ftm_initiator.pasn_list);
95 return 0;
96 out:
97 kfree(pasn);
98 return -EINVAL;
99 }
100
101 void iwl_mvm_ftm_remove_pasn_sta(struct iwl_mvm *mvm, u8 *addr)
102 {
103 struct iwl_mvm_ftm_pasn_entry *entry, *prev;
104
105 lockdep_assert_held(&mvm->mutex);
106
107 list_for_each_entry_safe(entry, prev, &mvm->ftm_initiator.pasn_list,
108 list) {
109 if (memcmp(entry->addr, addr, sizeof(entry->addr)))
110 continue;
111
112 list_del(&entry->list);
113 kfree(entry);
114 return;
115 }
116 }
117
118 static void iwl_mvm_ftm_reset(struct iwl_mvm *mvm)
119 {
120 struct iwl_mvm_loc_entry *e, *t;
121
122 mvm->ftm_initiator.req = NULL;
123 mvm->ftm_initiator.req_wdev = NULL;
124 memset(mvm->ftm_initiator.responses, 0,
125 sizeof(mvm->ftm_initiator.responses));
126
127 list_for_each_entry_safe(e, t, &mvm->ftm_initiator.loc_list, list) {
128 list_del(&e->list);
129 kfree(e);
130 }
131 }
132
133 void iwl_mvm_ftm_restart(struct iwl_mvm *mvm)
134 {
135 struct cfg80211_pmsr_result result = {
136 .status = NL80211_PMSR_STATUS_FAILURE,
137 .final = 1,
138 .host_time = ktime_get_boottime_ns(),
139 .type = NL80211_PMSR_TYPE_FTM,
140 };
141 int i;
142
143 lockdep_assert_held(&mvm->mutex);
144
145 if (!mvm->ftm_initiator.req)
146 return;
147
148 for (i = 0; i < mvm->ftm_initiator.req->n_peers; i++) {
149 memcpy(result.addr, mvm->ftm_initiator.req->peers[i].addr,
150 ETH_ALEN);
151 result.ftm.burst_index = mvm->ftm_initiator.responses[i];
152
153 cfg80211_pmsr_report(mvm->ftm_initiator.req_wdev,
154 mvm->ftm_initiator.req,
155 &result, GFP_KERNEL);
156 }
157
158 cfg80211_pmsr_complete(mvm->ftm_initiator.req_wdev,
159 mvm->ftm_initiator.req, GFP_KERNEL);
160 iwl_mvm_ftm_reset(mvm);
161 }
162
163 void iwl_mvm_ftm_initiator_smooth_config(struct iwl_mvm *mvm)
164 {
165 INIT_LIST_HEAD(&mvm->ftm_initiator.smooth.resp);
166
167 IWL_DEBUG_INFO(mvm,
168 "enable=%u, alpha=%u, age_jiffies=%u, thresh=(%u:%u)\n",
169 IWL_MVM_FTM_INITIATOR_ENABLE_SMOOTH,
170 IWL_MVM_FTM_INITIATOR_SMOOTH_ALPHA,
171 IWL_MVM_FTM_INITIATOR_SMOOTH_AGE_SEC * HZ,
172 IWL_MVM_FTM_INITIATOR_SMOOTH_OVERSHOOT,
173 IWL_MVM_FTM_INITIATOR_SMOOTH_UNDERSHOOT);
174 }
175
176 void iwl_mvm_ftm_initiator_smooth_stop(struct iwl_mvm *mvm)
177 {
178 struct iwl_mvm_smooth_entry *se, *st;
179
180 list_for_each_entry_safe(se, st, &mvm->ftm_initiator.smooth.resp,
181 list) {
182 list_del(&se->list);
183 kfree(se);
184 }
185 }
186
187 static int
188 iwl_ftm_range_request_status_to_err(enum iwl_tof_range_request_status s)
189 {
190 switch (s) {
191 case IWL_TOF_RANGE_REQUEST_STATUS_SUCCESS:
192 return 0;
193 case IWL_TOF_RANGE_REQUEST_STATUS_BUSY:
194 return -EBUSY;
195 default:
196 WARN_ON_ONCE(1);
197 return -EIO;
198 }
199 }
200
201 static void iwl_mvm_ftm_cmd_v5(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
202 struct iwl_tof_range_req_cmd_v5 *cmd,
203 struct cfg80211_pmsr_request *req)
204 {
205 int i;
206
207 cmd->request_id = req->cookie;
208 cmd->num_of_ap = req->n_peers;
209
210 /* use maximum for "no timeout" or bigger than what we can do */
211 if (!req->timeout || req->timeout > 255 * 100)
212 cmd->req_timeout = 255;
213 else
214 cmd->req_timeout = DIV_ROUND_UP(req->timeout, 100);
215
216 /*
217 * We treat it always as random, since if not we'll
218 * have filled our local address there instead.
219 */
220 cmd->macaddr_random = 1;
221 memcpy(cmd->macaddr_template, req->mac_addr, ETH_ALEN);
222 for (i = 0; i < ETH_ALEN; i++)
223 cmd->macaddr_mask[i] = ~req->mac_addr_mask[i];
224
225 if (vif->bss_conf.assoc)
226 memcpy(cmd->range_req_bssid, vif->bss_conf.bssid, ETH_ALEN);
227 else
228 eth_broadcast_addr(cmd->range_req_bssid);
229 }
230
231 static void iwl_mvm_ftm_cmd_common(struct iwl_mvm *mvm,
232 struct ieee80211_vif *vif,
233 struct iwl_tof_range_req_cmd_v9 *cmd,
234 struct cfg80211_pmsr_request *req)
235 {
236 int i;
237
238 cmd->initiator_flags =
239 cpu_to_le32(IWL_TOF_INITIATOR_FLAGS_MACADDR_RANDOM |
240 IWL_TOF_INITIATOR_FLAGS_NON_ASAP_SUPPORT);
241 cmd->request_id = req->cookie;
242 cmd->num_of_ap = req->n_peers;
243
244 /*
245 * Use a large value for "no timeout". Don't use the maximum value
246 * because of fw limitations.
247 */
248 if (req->timeout)
249 cmd->req_timeout_ms = cpu_to_le32(req->timeout);
250 else
251 cmd->req_timeout_ms = cpu_to_le32(0xfffff);
252
253 memcpy(cmd->macaddr_template, req->mac_addr, ETH_ALEN);
254 for (i = 0; i < ETH_ALEN; i++)
255 cmd->macaddr_mask[i] = ~req->mac_addr_mask[i];
256
257 if (vif->bss_conf.assoc) {
258 memcpy(cmd->range_req_bssid, vif->bss_conf.bssid, ETH_ALEN);
259
260 /* AP's TSF is only relevant if associated */
261 for (i = 0; i < req->n_peers; i++) {
262 if (req->peers[i].report_ap_tsf) {
263 struct iwl_mvm_vif *mvmvif =
264 iwl_mvm_vif_from_mac80211(vif);
265
266 cmd->tsf_mac_id = cpu_to_le32(mvmvif->id);
267 return;
268 }
269 }
270 } else {
271 eth_broadcast_addr(cmd->range_req_bssid);
272 }
273
274 /* Don't report AP's TSF */
275 cmd->tsf_mac_id = cpu_to_le32(0xff);
276 }
277
278 static void iwl_mvm_ftm_cmd_v8(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
279 struct iwl_tof_range_req_cmd_v8 *cmd,
280 struct cfg80211_pmsr_request *req)
281 {
282 iwl_mvm_ftm_cmd_common(mvm, vif, (void *)cmd, req);
283 }
284
285 static int
286 iwl_mvm_ftm_target_chandef_v1(struct iwl_mvm *mvm,
287 struct cfg80211_pmsr_request_peer *peer,
288 u8 *channel, u8 *bandwidth,
289 u8 *ctrl_ch_position)
290 {
291 u32 freq = peer->chandef.chan->center_freq;
292
293 *channel = ieee80211_frequency_to_channel(freq);
294
295 switch (peer->chandef.width) {
296 case NL80211_CHAN_WIDTH_20_NOHT:
297 *bandwidth = IWL_TOF_BW_20_LEGACY;
298 break;
299 case NL80211_CHAN_WIDTH_20:
300 *bandwidth = IWL_TOF_BW_20_HT;
301 break;
302 case NL80211_CHAN_WIDTH_40:
303 *bandwidth = IWL_TOF_BW_40;
304 break;
305 case NL80211_CHAN_WIDTH_80:
306 *bandwidth = IWL_TOF_BW_80;
307 break;
308 default:
309 IWL_ERR(mvm, "Unsupported BW in FTM request (%d)\n",
310 peer->chandef.width);
311 return -EINVAL;
312 }
313
314 *ctrl_ch_position = (peer->chandef.width > NL80211_CHAN_WIDTH_20) ?
315 iwl_mvm_get_ctrl_pos(&peer->chandef) : 0;
316
317 return 0;
318 }
319
320 static int
321 iwl_mvm_ftm_target_chandef_v2(struct iwl_mvm *mvm,
322 struct cfg80211_pmsr_request_peer *peer,
323 u8 *channel, u8 *format_bw,
324 u8 *ctrl_ch_position)
325 {
326 u32 freq = peer->chandef.chan->center_freq;
327
328 *channel = ieee80211_frequency_to_channel(freq);
329
330 switch (peer->chandef.width) {
331 case NL80211_CHAN_WIDTH_20_NOHT:
332 *format_bw = IWL_LOCATION_FRAME_FORMAT_LEGACY;
333 *format_bw |= IWL_LOCATION_BW_20MHZ << LOCATION_BW_POS;
334 break;
335 case NL80211_CHAN_WIDTH_20:
336 *format_bw = IWL_LOCATION_FRAME_FORMAT_HT;
337 *format_bw |= IWL_LOCATION_BW_20MHZ << LOCATION_BW_POS;
338 break;
339 case NL80211_CHAN_WIDTH_40:
340 *format_bw = IWL_LOCATION_FRAME_FORMAT_HT;
341 *format_bw |= IWL_LOCATION_BW_40MHZ << LOCATION_BW_POS;
342 break;
343 case NL80211_CHAN_WIDTH_80:
344 *format_bw = IWL_LOCATION_FRAME_FORMAT_VHT;
345 *format_bw |= IWL_LOCATION_BW_80MHZ << LOCATION_BW_POS;
346 break;
347 default:
348 IWL_ERR(mvm, "Unsupported BW in FTM request (%d)\n",
349 peer->chandef.width);
350 return -EINVAL;
351 }
352
353 /* non EDCA based measurement must use HE preamble */
354 if (peer->ftm.trigger_based || peer->ftm.non_trigger_based)
355 *format_bw |= IWL_LOCATION_FRAME_FORMAT_HE;
356
357 *ctrl_ch_position = (peer->chandef.width > NL80211_CHAN_WIDTH_20) ?
358 iwl_mvm_get_ctrl_pos(&peer->chandef) : 0;
359
360 return 0;
361 }
362
363 static int
364 iwl_mvm_ftm_put_target_v2(struct iwl_mvm *mvm,
365 struct cfg80211_pmsr_request_peer *peer,
366 struct iwl_tof_range_req_ap_entry_v2 *target)
367 {
368 int ret;
369
370 ret = iwl_mvm_ftm_target_chandef_v1(mvm, peer, &target->channel_num,
371 &target->bandwidth,
372 &target->ctrl_ch_position);
373 if (ret)
374 return ret;
375
376 memcpy(target->bssid, peer->addr, ETH_ALEN);
377 target->burst_period =
378 cpu_to_le16(peer->ftm.burst_period);
379 target->samples_per_burst = peer->ftm.ftms_per_burst;
380 target->num_of_bursts = peer->ftm.num_bursts_exp;
381 target->measure_type = 0; /* regular two-sided FTM */
382 target->retries_per_sample = peer->ftm.ftmr_retries;
383 target->asap_mode = peer->ftm.asap;
384 target->enable_dyn_ack = IWL_MVM_FTM_INITIATOR_DYNACK;
385
386 if (peer->ftm.request_lci)
387 target->location_req |= IWL_TOF_LOC_LCI;
388 if (peer->ftm.request_civicloc)
389 target->location_req |= IWL_TOF_LOC_CIVIC;
390
391 target->algo_type = IWL_MVM_FTM_INITIATOR_ALGO;
392
393 return 0;
394 }
395
396 #define FTM_PUT_FLAG(flag) (target->initiator_ap_flags |= \
397 cpu_to_le32(IWL_INITIATOR_AP_FLAGS_##flag))
398
399 static void
400 iwl_mvm_ftm_put_target_common(struct iwl_mvm *mvm,
401 struct cfg80211_pmsr_request_peer *peer,
402 struct iwl_tof_range_req_ap_entry_v6 *target)
403 {
404 memcpy(target->bssid, peer->addr, ETH_ALEN);
405 target->burst_period =
406 cpu_to_le16(peer->ftm.burst_period);
407 target->samples_per_burst = peer->ftm.ftms_per_burst;
408 target->num_of_bursts = peer->ftm.num_bursts_exp;
409 target->ftmr_max_retries = peer->ftm.ftmr_retries;
410 target->initiator_ap_flags = cpu_to_le32(0);
411
412 if (peer->ftm.asap)
413 FTM_PUT_FLAG(ASAP);
414
415 if (peer->ftm.request_lci)
416 FTM_PUT_FLAG(LCI_REQUEST);
417
418 if (peer->ftm.request_civicloc)
419 FTM_PUT_FLAG(CIVIC_REQUEST);
420
421 if (IWL_MVM_FTM_INITIATOR_DYNACK)
422 FTM_PUT_FLAG(DYN_ACK);
423
424 if (IWL_MVM_FTM_INITIATOR_ALGO == IWL_TOF_ALGO_TYPE_LINEAR_REG)
425 FTM_PUT_FLAG(ALGO_LR);
426 else if (IWL_MVM_FTM_INITIATOR_ALGO == IWL_TOF_ALGO_TYPE_FFT)
427 FTM_PUT_FLAG(ALGO_FFT);
428
429 if (peer->ftm.trigger_based)
430 FTM_PUT_FLAG(TB);
431 else if (peer->ftm.non_trigger_based)
432 FTM_PUT_FLAG(NON_TB);
433 }
434
435 static int
436 iwl_mvm_ftm_put_target_v3(struct iwl_mvm *mvm,
437 struct cfg80211_pmsr_request_peer *peer,
438 struct iwl_tof_range_req_ap_entry_v3 *target)
439 {
440 int ret;
441
442 ret = iwl_mvm_ftm_target_chandef_v1(mvm, peer, &target->channel_num,
443 &target->bandwidth,
444 &target->ctrl_ch_position);
445 if (ret)
446 return ret;
447
448 /*
449 * Versions 3 and 4 has some common fields, so
450 * iwl_mvm_ftm_put_target_common() can be used for version 7 too.
451 */
452 iwl_mvm_ftm_put_target_common(mvm, peer, (void *)target);
453
454 return 0;
455 }
456
457 static int
458 iwl_mvm_ftm_put_target_v4(struct iwl_mvm *mvm,
459 struct cfg80211_pmsr_request_peer *peer,
460 struct iwl_tof_range_req_ap_entry_v4 *target)
461 {
462 int ret;
463
464 ret = iwl_mvm_ftm_target_chandef_v2(mvm, peer, &target->channel_num,
465 &target->format_bw,
466 &target->ctrl_ch_position);
467 if (ret)
468 return ret;
469
470 iwl_mvm_ftm_put_target_common(mvm, peer, (void *)target);
471
472 return 0;
473 }
474
475 static int
476 iwl_mvm_ftm_put_target(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
477 struct cfg80211_pmsr_request_peer *peer,
478 struct iwl_tof_range_req_ap_entry_v6 *target)
479 {
480 int ret;
481
482 ret = iwl_mvm_ftm_target_chandef_v2(mvm, peer, &target->channel_num,
483 &target->format_bw,
484 &target->ctrl_ch_position);
485 if (ret)
486 return ret;
487
488 iwl_mvm_ftm_put_target_common(mvm, peer, target);
489
490 if (vif->bss_conf.assoc &&
491 !memcmp(peer->addr, vif->bss_conf.bssid, ETH_ALEN)) {
492 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
493
494 target->sta_id = mvmvif->ap_sta_id;
495 } else {
496 target->sta_id = IWL_MVM_INVALID_STA;
497 }
498
499 /*
500 * TODO: Beacon interval is currently unknown, so use the common value
501 * of 100 TUs.
502 */
503 target->beacon_interval = cpu_to_le16(100);
504 return 0;
505 }
506
507 static int iwl_mvm_ftm_send_cmd(struct iwl_mvm *mvm, struct iwl_host_cmd *hcmd)
508 {
509 u32 status;
510 int err = iwl_mvm_send_cmd_status(mvm, hcmd, &status);
511
512 if (!err && status) {
513 IWL_ERR(mvm, "FTM range request command failure, status: %u\n",
514 status);
515 err = iwl_ftm_range_request_status_to_err(status);
516 }
517
518 return err;
519 }
520
521 static int iwl_mvm_ftm_start_v5(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
522 struct cfg80211_pmsr_request *req)
523 {
524 struct iwl_tof_range_req_cmd_v5 cmd_v5;
525 struct iwl_host_cmd hcmd = {
526 .id = iwl_cmd_id(TOF_RANGE_REQ_CMD, LOCATION_GROUP, 0),
527 .dataflags[0] = IWL_HCMD_DFL_DUP,
528 .data[0] = &cmd_v5,
529 .len[0] = sizeof(cmd_v5),
530 };
531 u8 i;
532 int err;
533
534 iwl_mvm_ftm_cmd_v5(mvm, vif, &cmd_v5, req);
535
536 for (i = 0; i < cmd_v5.num_of_ap; i++) {
537 struct cfg80211_pmsr_request_peer *peer = &req->peers[i];
538
539 err = iwl_mvm_ftm_put_target_v2(mvm, peer, &cmd_v5.ap[i]);
540 if (err)
541 return err;
542 }
543
544 return iwl_mvm_ftm_send_cmd(mvm, &hcmd);
545 }
546
547 static int iwl_mvm_ftm_start_v7(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
548 struct cfg80211_pmsr_request *req)
549 {
550 struct iwl_tof_range_req_cmd_v7 cmd_v7;
551 struct iwl_host_cmd hcmd = {
552 .id = iwl_cmd_id(TOF_RANGE_REQ_CMD, LOCATION_GROUP, 0),
553 .dataflags[0] = IWL_HCMD_DFL_DUP,
554 .data[0] = &cmd_v7,
555 .len[0] = sizeof(cmd_v7),
556 };
557 u8 i;
558 int err;
559
560 /*
561 * Versions 7 and 8 has the same structure except from the responders
562 * list, so iwl_mvm_ftm_cmd() can be used for version 7 too.
563 */
564 iwl_mvm_ftm_cmd_v8(mvm, vif, (void *)&cmd_v7, req);
565
566 for (i = 0; i < cmd_v7.num_of_ap; i++) {
567 struct cfg80211_pmsr_request_peer *peer = &req->peers[i];
568
569 err = iwl_mvm_ftm_put_target_v3(mvm, peer, &cmd_v7.ap[i]);
570 if (err)
571 return err;
572 }
573
574 return iwl_mvm_ftm_send_cmd(mvm, &hcmd);
575 }
576
577 static int iwl_mvm_ftm_start_v8(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
578 struct cfg80211_pmsr_request *req)
579 {
580 struct iwl_tof_range_req_cmd_v8 cmd;
581 struct iwl_host_cmd hcmd = {
582 .id = iwl_cmd_id(TOF_RANGE_REQ_CMD, LOCATION_GROUP, 0),
583 .dataflags[0] = IWL_HCMD_DFL_DUP,
584 .data[0] = &cmd,
585 .len[0] = sizeof(cmd),
586 };
587 u8 i;
588 int err;
589
590 iwl_mvm_ftm_cmd_v8(mvm, vif, (void *)&cmd, req);
591
592 for (i = 0; i < cmd.num_of_ap; i++) {
593 struct cfg80211_pmsr_request_peer *peer = &req->peers[i];
594
595 err = iwl_mvm_ftm_put_target_v4(mvm, peer, &cmd.ap[i]);
596 if (err)
597 return err;
598 }
599
600 return iwl_mvm_ftm_send_cmd(mvm, &hcmd);
601 }
602
603 static int iwl_mvm_ftm_start_v9(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
604 struct cfg80211_pmsr_request *req)
605 {
606 struct iwl_tof_range_req_cmd_v9 cmd;
607 struct iwl_host_cmd hcmd = {
608 .id = iwl_cmd_id(TOF_RANGE_REQ_CMD, LOCATION_GROUP, 0),
609 .dataflags[0] = IWL_HCMD_DFL_DUP,
610 .data[0] = &cmd,
611 .len[0] = sizeof(cmd),
612 };
613 u8 i;
614 int err;
615
616 iwl_mvm_ftm_cmd_common(mvm, vif, &cmd, req);
617
618 for (i = 0; i < cmd.num_of_ap; i++) {
619 struct cfg80211_pmsr_request_peer *peer = &req->peers[i];
620 struct iwl_tof_range_req_ap_entry_v6 *target = &cmd.ap[i];
621
622 err = iwl_mvm_ftm_put_target(mvm, vif, peer, target);
623 if (err)
624 return err;
625 }
626
627 return iwl_mvm_ftm_send_cmd(mvm, &hcmd);
628 }
629
630 static void iter(struct ieee80211_hw *hw,
631 struct ieee80211_vif *vif,
632 struct ieee80211_sta *sta,
633 struct ieee80211_key_conf *key,
634 void *data)
635 {
636 struct iwl_tof_range_req_ap_entry_v6 *target = data;
637
638 if (!sta || memcmp(sta->addr, target->bssid, ETH_ALEN))
639 return;
640
641 WARN_ON(!sta->mfp);
642
643 if (WARN_ON(key->keylen > sizeof(target->tk)))
644 return;
645
646 memcpy(target->tk, key->key, key->keylen);
647 target->cipher = iwl_mvm_cipher_to_location_cipher(key->cipher);
648 WARN_ON(target->cipher == IWL_LOCATION_CIPHER_INVALID);
649 }
650
651 static void
652 iwl_mvm_ftm_set_secured_ranging(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
653 struct iwl_tof_range_req_ap_entry_v7 *target)
654 {
655 struct iwl_mvm_ftm_pasn_entry *entry;
656 u32 flags = le32_to_cpu(target->initiator_ap_flags);
657
658 if (!(flags & (IWL_INITIATOR_AP_FLAGS_NON_TB |
659 IWL_INITIATOR_AP_FLAGS_TB)))
660 return;
661
662 lockdep_assert_held(&mvm->mutex);
663
664 list_for_each_entry(entry, &mvm->ftm_initiator.pasn_list, list) {
665 if (memcmp(entry->addr, target->bssid, sizeof(entry->addr)))
666 continue;
667
668 target->cipher = entry->cipher;
669 memcpy(target->hltk, entry->hltk, sizeof(target->hltk));
670
671 if (vif->bss_conf.assoc &&
672 !memcmp(vif->bss_conf.bssid, target->bssid,
673 sizeof(target->bssid)))
674 ieee80211_iter_keys(mvm->hw, vif, iter, target);
675 else
676 memcpy(target->tk, entry->tk, sizeof(target->tk));
677
678 memcpy(target->rx_pn, entry->rx_pn, sizeof(target->rx_pn));
679 memcpy(target->tx_pn, entry->tx_pn, sizeof(target->tx_pn));
680
681 target->initiator_ap_flags |=
682 cpu_to_le32(IWL_INITIATOR_AP_FLAGS_SECURED);
683 return;
684 }
685 }
686
687 static int iwl_mvm_ftm_start_v11(struct iwl_mvm *mvm,
688 struct ieee80211_vif *vif,
689 struct cfg80211_pmsr_request *req)
690 {
691 struct iwl_tof_range_req_cmd_v11 cmd;
692 struct iwl_host_cmd hcmd = {
693 .id = iwl_cmd_id(TOF_RANGE_REQ_CMD, LOCATION_GROUP, 0),
694 .dataflags[0] = IWL_HCMD_DFL_DUP,
695 .data[0] = &cmd,
696 .len[0] = sizeof(cmd),
697 };
698 u8 i;
699 int err;
700
701 iwl_mvm_ftm_cmd_common(mvm, vif, (void *)&cmd, req);
702
703 for (i = 0; i < cmd.num_of_ap; i++) {
704 struct cfg80211_pmsr_request_peer *peer = &req->peers[i];
705 struct iwl_tof_range_req_ap_entry_v7 *target = &cmd.ap[i];
706
707 err = iwl_mvm_ftm_put_target(mvm, vif, peer, (void *)target);
708 if (err)
709 return err;
710
711 iwl_mvm_ftm_set_secured_ranging(mvm, vif, target);
712 }
713
714 return iwl_mvm_ftm_send_cmd(mvm, &hcmd);
715 }
716
717 int iwl_mvm_ftm_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
718 struct cfg80211_pmsr_request *req)
719 {
720 bool new_api = fw_has_api(&mvm->fw->ucode_capa,
721 IWL_UCODE_TLV_API_FTM_NEW_RANGE_REQ);
722 int err;
723
724 lockdep_assert_held(&mvm->mutex);
725
726 if (mvm->ftm_initiator.req)
727 return -EBUSY;
728
729 if (new_api) {
730 u8 cmd_ver = iwl_fw_lookup_cmd_ver(mvm->fw, LOCATION_GROUP,
731 TOF_RANGE_REQ_CMD,
732 IWL_FW_CMD_VER_UNKNOWN);
733
734 switch (cmd_ver) {
735 case 11:
736 err = iwl_mvm_ftm_start_v11(mvm, vif, req);
737 break;
738 case 9:
739 case 10:
740 err = iwl_mvm_ftm_start_v9(mvm, vif, req);
741 break;
742 case 8:
743 err = iwl_mvm_ftm_start_v8(mvm, vif, req);
744 break;
745 default:
746 err = iwl_mvm_ftm_start_v7(mvm, vif, req);
747 break;
748 }
749 } else {
750 err = iwl_mvm_ftm_start_v5(mvm, vif, req);
751 }
752
753 if (!err) {
754 mvm->ftm_initiator.req = req;
755 mvm->ftm_initiator.req_wdev = ieee80211_vif_to_wdev(vif);
756 }
757
758 return err;
759 }
760
761 void iwl_mvm_ftm_abort(struct iwl_mvm *mvm, struct cfg80211_pmsr_request *req)
762 {
763 struct iwl_tof_range_abort_cmd cmd = {
764 .request_id = req->cookie,
765 };
766
767 lockdep_assert_held(&mvm->mutex);
768
769 if (req != mvm->ftm_initiator.req)
770 return;
771
772 iwl_mvm_ftm_reset(mvm);
773
774 if (iwl_mvm_send_cmd_pdu(mvm, iwl_cmd_id(TOF_RANGE_ABORT_CMD,
775 LOCATION_GROUP, 0),
776 0, sizeof(cmd), &cmd))
777 IWL_ERR(mvm, "failed to abort FTM process\n");
778 }
779
780 static int iwl_mvm_ftm_find_peer(struct cfg80211_pmsr_request *req,
781 const u8 *addr)
782 {
783 int i;
784
785 for (i = 0; i < req->n_peers; i++) {
786 struct cfg80211_pmsr_request_peer *peer = &req->peers[i];
787
788 if (ether_addr_equal_unaligned(peer->addr, addr))
789 return i;
790 }
791
792 return -ENOENT;
793 }
794
795 static u64 iwl_mvm_ftm_get_host_time(struct iwl_mvm *mvm, __le32 fw_gp2_ts)
796 {
797 u32 gp2_ts = le32_to_cpu(fw_gp2_ts);
798 u32 curr_gp2, diff;
799 u64 now_from_boot_ns;
800
801 iwl_mvm_get_sync_time(mvm, &curr_gp2, &now_from_boot_ns);
802
803 if (curr_gp2 >= gp2_ts)
804 diff = curr_gp2 - gp2_ts;
805 else
806 diff = curr_gp2 + (U32_MAX - gp2_ts + 1);
807
808 return now_from_boot_ns - (u64)diff * 1000;
809 }
810
811 static void iwl_mvm_ftm_get_lci_civic(struct iwl_mvm *mvm,
812 struct cfg80211_pmsr_result *res)
813 {
814 struct iwl_mvm_loc_entry *entry;
815
816 list_for_each_entry(entry, &mvm->ftm_initiator.loc_list, list) {
817 if (!ether_addr_equal_unaligned(res->addr, entry->addr))
818 continue;
819
820 if (entry->lci_len) {
821 res->ftm.lci_len = entry->lci_len;
822 res->ftm.lci = entry->buf;
823 }
824
825 if (entry->civic_len) {
826 res->ftm.civicloc_len = entry->civic_len;
827 res->ftm.civicloc = entry->buf + entry->lci_len;
828 }
829
830 /* we found the entry we needed */
831 break;
832 }
833 }
834
835 static int iwl_mvm_ftm_range_resp_valid(struct iwl_mvm *mvm, u8 request_id,
836 u8 num_of_aps)
837 {
838 lockdep_assert_held(&mvm->mutex);
839
840 if (request_id != (u8)mvm->ftm_initiator.req->cookie) {
841 IWL_ERR(mvm, "Request ID mismatch, got %u, active %u\n",
842 request_id, (u8)mvm->ftm_initiator.req->cookie);
843 return -EINVAL;
844 }
845
846 if (num_of_aps > mvm->ftm_initiator.req->n_peers) {
847 IWL_ERR(mvm, "FTM range response invalid\n");
848 return -EINVAL;
849 }
850
851 return 0;
852 }
853
854 static void iwl_mvm_ftm_rtt_smoothing(struct iwl_mvm *mvm,
855 struct cfg80211_pmsr_result *res)
856 {
857 struct iwl_mvm_smooth_entry *resp;
858 s64 rtt_avg, rtt = res->ftm.rtt_avg;
859 u32 undershoot, overshoot;
860 u8 alpha;
861 bool found;
862
863 if (!IWL_MVM_FTM_INITIATOR_ENABLE_SMOOTH)
864 return;
865
866 WARN_ON(rtt < 0);
867
868 if (res->status != NL80211_PMSR_STATUS_SUCCESS) {
869 IWL_DEBUG_INFO(mvm,
870 ": %pM: ignore failed measurement. Status=%u\n",
871 res->addr, res->status);
872 return;
873 }
874
875 found = false;
876 list_for_each_entry(resp, &mvm->ftm_initiator.smooth.resp, list) {
877 if (!memcmp(res->addr, resp->addr, ETH_ALEN)) {
878 found = true;
879 break;
880 }
881 }
882
883 if (!found) {
884 resp = kzalloc(sizeof(*resp), GFP_KERNEL);
885 if (!resp)
886 return;
887
888 memcpy(resp->addr, res->addr, ETH_ALEN);
889 list_add_tail(&resp->list, &mvm->ftm_initiator.smooth.resp);
890
891 resp->rtt_avg = rtt;
892
893 IWL_DEBUG_INFO(mvm, "new: %pM: rtt_avg=%lld\n",
894 resp->addr, resp->rtt_avg);
895 goto update_time;
896 }
897
898 if (res->host_time - resp->host_time >
899 IWL_MVM_FTM_INITIATOR_SMOOTH_AGE_SEC * 1000000000) {
900 resp->rtt_avg = rtt;
901
902 IWL_DEBUG_INFO(mvm, "expired: %pM: rtt_avg=%lld\n",
903 resp->addr, resp->rtt_avg);
904 goto update_time;
905 }
906
907 /* Smooth the results based on the tracked RTT average */
908 undershoot = IWL_MVM_FTM_INITIATOR_SMOOTH_UNDERSHOOT;
909 overshoot = IWL_MVM_FTM_INITIATOR_SMOOTH_OVERSHOOT;
910 alpha = IWL_MVM_FTM_INITIATOR_SMOOTH_ALPHA;
911
912 rtt_avg = (alpha * rtt + (100 - alpha) * resp->rtt_avg) / 100;
913
914 IWL_DEBUG_INFO(mvm,
915 "%pM: prev rtt_avg=%lld, new rtt_avg=%lld, rtt=%lld\n",
916 resp->addr, resp->rtt_avg, rtt_avg, rtt);
917
918 /*
919 * update the responder's average RTT results regardless of
920 * the under/over shoot logic below
921 */
922 resp->rtt_avg = rtt_avg;
923
924 /* smooth the results */
925 if (rtt_avg > rtt && (rtt_avg - rtt) > undershoot) {
926 res->ftm.rtt_avg = rtt_avg;
927
928 IWL_DEBUG_INFO(mvm,
929 "undershoot: val=%lld\n",
930 (rtt_avg - rtt));
931 } else if (rtt_avg < rtt && (rtt - rtt_avg) >
932 overshoot) {
933 res->ftm.rtt_avg = rtt_avg;
934 IWL_DEBUG_INFO(mvm,
935 "overshoot: val=%lld\n",
936 (rtt - rtt_avg));
937 }
938
939 update_time:
940 resp->host_time = res->host_time;
941 }
942
943 static void iwl_mvm_debug_range_resp(struct iwl_mvm *mvm, u8 index,
944 struct cfg80211_pmsr_result *res)
945 {
946 s64 rtt_avg = div_s64(res->ftm.rtt_avg * 100, 6666);
947
948 IWL_DEBUG_INFO(mvm, "entry %d\n", index);
949 IWL_DEBUG_INFO(mvm, "\tstatus: %d\n", res->status);
950 IWL_DEBUG_INFO(mvm, "\tBSSID: %pM\n", res->addr);
951 IWL_DEBUG_INFO(mvm, "\thost time: %llu\n", res->host_time);
952 IWL_DEBUG_INFO(mvm, "\tburst index: %hhu\n", res->ftm.burst_index);
953 IWL_DEBUG_INFO(mvm, "\tsuccess num: %u\n", res->ftm.num_ftmr_successes);
954 IWL_DEBUG_INFO(mvm, "\trssi: %d\n", res->ftm.rssi_avg);
955 IWL_DEBUG_INFO(mvm, "\trssi spread: %hhu\n", res->ftm.rssi_spread);
956 IWL_DEBUG_INFO(mvm, "\trtt: %lld\n", res->ftm.rtt_avg);
957 IWL_DEBUG_INFO(mvm, "\trtt var: %llu\n", res->ftm.rtt_variance);
958 IWL_DEBUG_INFO(mvm, "\trtt spread: %llu\n", res->ftm.rtt_spread);
959 IWL_DEBUG_INFO(mvm, "\tdistance: %lld\n", rtt_avg);
960 }
961
962 static void
963 iwl_mvm_ftm_pasn_update_pn(struct iwl_mvm *mvm,
964 struct iwl_tof_range_rsp_ap_entry_ntfy_v6 *fw_ap)
965 {
966 struct iwl_mvm_ftm_pasn_entry *entry;
967
968 lockdep_assert_held(&mvm->mutex);
969
970 list_for_each_entry(entry, &mvm->ftm_initiator.pasn_list, list) {
971 if (memcmp(fw_ap->bssid, entry->addr, sizeof(entry->addr)))
972 continue;
973
974 memcpy(entry->rx_pn, fw_ap->rx_pn, sizeof(entry->rx_pn));
975 memcpy(entry->tx_pn, fw_ap->tx_pn, sizeof(entry->tx_pn));
976 return;
977 }
978 }
979
980 static u8 iwl_mvm_ftm_get_range_resp_ver(struct iwl_mvm *mvm)
981 {
982 if (!fw_has_api(&mvm->fw->ucode_capa,
983 IWL_UCODE_TLV_API_FTM_NEW_RANGE_REQ))
984 return 5;
985
986 /* Starting from version 8, the FW advertises the version */
987 if (mvm->cmd_ver.range_resp >= 8)
988 return mvm->cmd_ver.range_resp;
989 else if (fw_has_api(&mvm->fw->ucode_capa,
990 IWL_UCODE_TLV_API_FTM_RTT_ACCURACY))
991 return 7;
992
993 /* The first version of the new range request API */
994 return 6;
995 }
996
997 static bool iwl_mvm_ftm_resp_size_validation(u8 ver, unsigned int pkt_len)
998 {
999 switch (ver) {
1000 case 8:
1001 return pkt_len == sizeof(struct iwl_tof_range_rsp_ntfy_v8);
1002 case 7:
1003 return pkt_len == sizeof(struct iwl_tof_range_rsp_ntfy_v7);
1004 case 6:
1005 return pkt_len == sizeof(struct iwl_tof_range_rsp_ntfy_v6);
1006 case 5:
1007 return pkt_len == sizeof(struct iwl_tof_range_rsp_ntfy_v5);
1008 default:
1009 WARN_ONCE(1, "FTM: unsupported range response version %u", ver);
1010 return false;
1011 }
1012 }
1013
1014 void iwl_mvm_ftm_range_resp(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
1015 {
1016 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1017 unsigned int pkt_len = iwl_rx_packet_payload_len(pkt);
1018 struct iwl_tof_range_rsp_ntfy_v5 *fw_resp_v5 = (void *)pkt->data;
1019 struct iwl_tof_range_rsp_ntfy_v6 *fw_resp_v6 = (void *)pkt->data;
1020 struct iwl_tof_range_rsp_ntfy_v7 *fw_resp_v7 = (void *)pkt->data;
1021 struct iwl_tof_range_rsp_ntfy_v8 *fw_resp_v8 = (void *)pkt->data;
1022 int i;
1023 bool new_api = fw_has_api(&mvm->fw->ucode_capa,
1024 IWL_UCODE_TLV_API_FTM_NEW_RANGE_REQ);
1025 u8 num_of_aps, last_in_batch;
1026 u8 notif_ver = iwl_mvm_ftm_get_range_resp_ver(mvm);
1027
1028 lockdep_assert_held(&mvm->mutex);
1029
1030 if (!mvm->ftm_initiator.req) {
1031 return;
1032 }
1033
1034 if (unlikely(!iwl_mvm_ftm_resp_size_validation(notif_ver, pkt_len)))
1035 return;
1036
1037 if (new_api) {
1038 if (iwl_mvm_ftm_range_resp_valid(mvm, fw_resp_v8->request_id,
1039 fw_resp_v8->num_of_aps))
1040 return;
1041
1042 num_of_aps = fw_resp_v8->num_of_aps;
1043 last_in_batch = fw_resp_v8->last_report;
1044 } else {
1045 if (iwl_mvm_ftm_range_resp_valid(mvm, fw_resp_v5->request_id,
1046 fw_resp_v5->num_of_aps))
1047 return;
1048
1049 num_of_aps = fw_resp_v5->num_of_aps;
1050 last_in_batch = fw_resp_v5->last_in_batch;
1051 }
1052
1053 IWL_DEBUG_INFO(mvm, "Range response received\n");
1054 IWL_DEBUG_INFO(mvm, "request id: %lld, num of entries: %hhu\n",
1055 mvm->ftm_initiator.req->cookie, num_of_aps);
1056
1057 for (i = 0; i < num_of_aps && i < IWL_MVM_TOF_MAX_APS; i++) {
1058 struct cfg80211_pmsr_result result = {};
1059 struct iwl_tof_range_rsp_ap_entry_ntfy_v6 *fw_ap;
1060 int peer_idx;
1061
1062 if (new_api) {
1063 if (notif_ver == 8) {
1064 fw_ap = &fw_resp_v8->ap[i];
1065 iwl_mvm_ftm_pasn_update_pn(mvm, fw_ap);
1066 } else if (notif_ver == 7) {
1067 fw_ap = (void *)&fw_resp_v7->ap[i];
1068 } else {
1069 fw_ap = (void *)&fw_resp_v6->ap[i];
1070 }
1071
1072 result.final = fw_ap->last_burst;
1073 result.ap_tsf = le32_to_cpu(fw_ap->start_tsf);
1074 result.ap_tsf_valid = 1;
1075 } else {
1076 /* the first part is the same for old and new APIs */
1077 fw_ap = (void *)&fw_resp_v5->ap[i];
1078 /*
1079 * FIXME: the firmware needs to report this, we don't
1080 * even know the number of bursts the responder picked
1081 * (if we asked it to)
1082 */
1083 result.final = 0;
1084 }
1085
1086 peer_idx = iwl_mvm_ftm_find_peer(mvm->ftm_initiator.req,
1087 fw_ap->bssid);
1088 if (peer_idx < 0) {
1089 IWL_WARN(mvm,
1090 "Unknown address (%pM, target #%d) in FTM response\n",
1091 fw_ap->bssid, i);
1092 continue;
1093 }
1094
1095 switch (fw_ap->measure_status) {
1096 case IWL_TOF_ENTRY_SUCCESS:
1097 result.status = NL80211_PMSR_STATUS_SUCCESS;
1098 break;
1099 case IWL_TOF_ENTRY_TIMING_MEASURE_TIMEOUT:
1100 result.status = NL80211_PMSR_STATUS_TIMEOUT;
1101 break;
1102 case IWL_TOF_ENTRY_NO_RESPONSE:
1103 result.status = NL80211_PMSR_STATUS_FAILURE;
1104 result.ftm.failure_reason =
1105 NL80211_PMSR_FTM_FAILURE_NO_RESPONSE;
1106 break;
1107 case IWL_TOF_ENTRY_REQUEST_REJECTED:
1108 result.status = NL80211_PMSR_STATUS_FAILURE;
1109 result.ftm.failure_reason =
1110 NL80211_PMSR_FTM_FAILURE_PEER_BUSY;
1111 result.ftm.busy_retry_time = fw_ap->refusal_period;
1112 break;
1113 default:
1114 result.status = NL80211_PMSR_STATUS_FAILURE;
1115 result.ftm.failure_reason =
1116 NL80211_PMSR_FTM_FAILURE_UNSPECIFIED;
1117 break;
1118 }
1119 memcpy(result.addr, fw_ap->bssid, ETH_ALEN);
1120 result.host_time = iwl_mvm_ftm_get_host_time(mvm,
1121 fw_ap->timestamp);
1122 result.type = NL80211_PMSR_TYPE_FTM;
1123 result.ftm.burst_index = mvm->ftm_initiator.responses[peer_idx];
1124 mvm->ftm_initiator.responses[peer_idx]++;
1125 result.ftm.rssi_avg = fw_ap->rssi;
1126 result.ftm.rssi_avg_valid = 1;
1127 result.ftm.rssi_spread = fw_ap->rssi_spread;
1128 result.ftm.rssi_spread_valid = 1;
1129 result.ftm.rtt_avg = (s32)le32_to_cpu(fw_ap->rtt);
1130 result.ftm.rtt_avg_valid = 1;
1131 result.ftm.rtt_variance = le32_to_cpu(fw_ap->rtt_variance);
1132 result.ftm.rtt_variance_valid = 1;
1133 result.ftm.rtt_spread = le32_to_cpu(fw_ap->rtt_spread);
1134 result.ftm.rtt_spread_valid = 1;
1135
1136 iwl_mvm_ftm_get_lci_civic(mvm, &result);
1137
1138 iwl_mvm_ftm_rtt_smoothing(mvm, &result);
1139
1140 cfg80211_pmsr_report(mvm->ftm_initiator.req_wdev,
1141 mvm->ftm_initiator.req,
1142 &result, GFP_KERNEL);
1143
1144 if (fw_has_api(&mvm->fw->ucode_capa,
1145 IWL_UCODE_TLV_API_FTM_RTT_ACCURACY))
1146 IWL_DEBUG_INFO(mvm, "RTT confidence: %hhu\n",
1147 fw_ap->rttConfidence);
1148
1149 iwl_mvm_debug_range_resp(mvm, i, &result);
1150 }
1151
1152 if (last_in_batch) {
1153 cfg80211_pmsr_complete(mvm->ftm_initiator.req_wdev,
1154 mvm->ftm_initiator.req,
1155 GFP_KERNEL);
1156 iwl_mvm_ftm_reset(mvm);
1157 }
1158 }
1159
1160 void iwl_mvm_ftm_lc_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
1161 {
1162 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1163 const struct ieee80211_mgmt *mgmt = (void *)pkt->data;
1164 size_t len = iwl_rx_packet_payload_len(pkt);
1165 struct iwl_mvm_loc_entry *entry;
1166 const u8 *ies, *lci, *civic, *msr_ie;
1167 size_t ies_len, lci_len = 0, civic_len = 0;
1168 size_t baselen = IEEE80211_MIN_ACTION_SIZE +
1169 sizeof(mgmt->u.action.u.ftm);
1170 static const u8 rprt_type_lci = IEEE80211_SPCT_MSR_RPRT_TYPE_LCI;
1171 static const u8 rprt_type_civic = IEEE80211_SPCT_MSR_RPRT_TYPE_CIVIC;
1172
1173 if (len <= baselen)
1174 return;
1175
1176 lockdep_assert_held(&mvm->mutex);
1177
1178 ies = mgmt->u.action.u.ftm.variable;
1179 ies_len = len - baselen;
1180
1181 msr_ie = cfg80211_find_ie_match(WLAN_EID_MEASURE_REPORT, ies, ies_len,
1182 &rprt_type_lci, 1, 4);
1183 if (msr_ie) {
1184 lci = msr_ie + 2;
1185 lci_len = msr_ie[1];
1186 }
1187
1188 msr_ie = cfg80211_find_ie_match(WLAN_EID_MEASURE_REPORT, ies, ies_len,
1189 &rprt_type_civic, 1, 4);
1190 if (msr_ie) {
1191 civic = msr_ie + 2;
1192 civic_len = msr_ie[1];
1193 }
1194
1195 entry = kmalloc(sizeof(*entry) + lci_len + civic_len, GFP_KERNEL);
1196 if (!entry)
1197 return;
1198
1199 memcpy(entry->addr, mgmt->bssid, ETH_ALEN);
1200
1201 entry->lci_len = lci_len;
1202 if (lci_len)
1203 memcpy(entry->buf, lci, lci_len);
1204
1205 entry->civic_len = civic_len;
1206 if (civic_len)
1207 memcpy(entry->buf + lci_len, civic, civic_len);
1208
1209 list_add_tail(&entry->list, &mvm->ftm_initiator.loc_list);
1210 }
Linux with added FPC-III support