1 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
2 /*
3 * Copyright (C) 2015-2017 Intel Deutschland GmbH
4 * Copyright (C) 2018-2022 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 enum iwl_mvm_pasn_flags {
29 IWL_MVM_PASN_FLAG_HAS_HLTK = BIT(0),
30 };
31
32 struct iwl_mvm_ftm_pasn_entry {
33 struct list_head list;
34 u8 addr[ETH_ALEN];
35 u8 hltk[HLTK_11AZ_LEN];
36 u8 tk[TK_11AZ_LEN];
37 u8 cipher;
38 u8 tx_pn[IEEE80211_CCMP_PN_LEN];
39 u8 rx_pn[IEEE80211_CCMP_PN_LEN];
40 u32 flags;
41 };
42
iwl_mvm_ftm_add_pasn_sta(struct iwl_mvm * mvm,struct ieee80211_vif * vif,u8 * addr,u32 cipher,u8 * tk,u32 tk_len,u8 * hltk,u32 hltk_len)43 int iwl_mvm_ftm_add_pasn_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
44 u8 *addr, u32 cipher, u8 *tk, u32 tk_len,
45 u8 *hltk, u32 hltk_len)
46 {
47 struct iwl_mvm_ftm_pasn_entry *pasn = kzalloc(sizeof(*pasn),
48 GFP_KERNEL);
49 u32 expected_tk_len;
50
51 lockdep_assert_held(&mvm->mutex);
52
53 if (!pasn)
54 return -ENOBUFS;
55
56 pasn->cipher = iwl_mvm_cipher_to_location_cipher(cipher);
57
58 switch (pasn->cipher) {
59 case IWL_LOCATION_CIPHER_CCMP_128:
60 case IWL_LOCATION_CIPHER_GCMP_128:
61 expected_tk_len = WLAN_KEY_LEN_CCMP;
62 break;
63 case IWL_LOCATION_CIPHER_GCMP_256:
64 expected_tk_len = WLAN_KEY_LEN_GCMP_256;
65 break;
66 default:
67 goto out;
68 }
69
70 /*
71 * If associated to this AP and already have security context,
72 * the TK is already configured for this station, so it
73 * shouldn't be set again here.
74 */
75 if (vif->cfg.assoc) {
76 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
77 struct ieee80211_bss_conf *link_conf;
78 unsigned int link_id;
79 struct ieee80211_sta *sta;
80 u8 sta_id;
81
82 rcu_read_lock();
83 for_each_vif_active_link(vif, link_conf, link_id) {
84 if (memcmp(addr, link_conf->bssid, ETH_ALEN))
85 continue;
86
87 sta_id = mvmvif->link[link_id]->ap_sta_id;
88 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
89 if (!IS_ERR_OR_NULL(sta) && sta->mfp)
90 expected_tk_len = 0;
91 break;
92 }
93 rcu_read_unlock();
94 }
95
96 if (tk_len != expected_tk_len ||
97 (hltk_len && hltk_len != sizeof(pasn->hltk))) {
98 IWL_ERR(mvm, "Invalid key length: tk_len=%u hltk_len=%u\n",
99 tk_len, hltk_len);
100 goto out;
101 }
102
103 if (!expected_tk_len && !hltk_len) {
104 IWL_ERR(mvm, "TK and HLTK not set\n");
105 goto out;
106 }
107
108 memcpy(pasn->addr, addr, sizeof(pasn->addr));
109
110 if (hltk_len) {
111 memcpy(pasn->hltk, hltk, sizeof(pasn->hltk));
112 pasn->flags |= IWL_MVM_PASN_FLAG_HAS_HLTK;
113 }
114
115 if (tk && tk_len)
116 memcpy(pasn->tk, tk, sizeof(pasn->tk));
117
118 list_add_tail(&pasn->list, &mvm->ftm_initiator.pasn_list);
119 return 0;
120 out:
121 kfree(pasn);
122 return -EINVAL;
123 }
124
iwl_mvm_ftm_remove_pasn_sta(struct iwl_mvm * mvm,u8 * addr)125 void iwl_mvm_ftm_remove_pasn_sta(struct iwl_mvm *mvm, u8 *addr)
126 {
127 struct iwl_mvm_ftm_pasn_entry *entry, *prev;
128
129 lockdep_assert_held(&mvm->mutex);
130
131 list_for_each_entry_safe(entry, prev, &mvm->ftm_initiator.pasn_list,
132 list) {
133 if (memcmp(entry->addr, addr, sizeof(entry->addr)))
134 continue;
135
136 list_del(&entry->list);
137 kfree(entry);
138 return;
139 }
140 }
141
iwl_mvm_ftm_reset(struct iwl_mvm * mvm)142 static void iwl_mvm_ftm_reset(struct iwl_mvm *mvm)
143 {
144 struct iwl_mvm_loc_entry *e, *t;
145
146 mvm->ftm_initiator.req = NULL;
147 mvm->ftm_initiator.req_wdev = NULL;
148 memset(mvm->ftm_initiator.responses, 0,
149 sizeof(mvm->ftm_initiator.responses));
150
151 list_for_each_entry_safe(e, t, &mvm->ftm_initiator.loc_list, list) {
152 list_del(&e->list);
153 kfree(e);
154 }
155 }
156
iwl_mvm_ftm_restart(struct iwl_mvm * mvm)157 void iwl_mvm_ftm_restart(struct iwl_mvm *mvm)
158 {
159 struct cfg80211_pmsr_result result = {
160 .status = NL80211_PMSR_STATUS_FAILURE,
161 .final = 1,
162 .host_time = ktime_get_boottime_ns(),
163 .type = NL80211_PMSR_TYPE_FTM,
164 };
165 int i;
166
167 lockdep_assert_held(&mvm->mutex);
168
169 if (!mvm->ftm_initiator.req)
170 return;
171
172 for (i = 0; i < mvm->ftm_initiator.req->n_peers; i++) {
173 memcpy(result.addr, mvm->ftm_initiator.req->peers[i].addr,
174 ETH_ALEN);
175 result.ftm.burst_index = mvm->ftm_initiator.responses[i];
176
177 cfg80211_pmsr_report(mvm->ftm_initiator.req_wdev,
178 mvm->ftm_initiator.req,
179 &result, GFP_KERNEL);
180 }
181
182 cfg80211_pmsr_complete(mvm->ftm_initiator.req_wdev,
183 mvm->ftm_initiator.req, GFP_KERNEL);
184 iwl_mvm_ftm_reset(mvm);
185 }
186
iwl_mvm_ftm_initiator_smooth_config(struct iwl_mvm * mvm)187 void iwl_mvm_ftm_initiator_smooth_config(struct iwl_mvm *mvm)
188 {
189 INIT_LIST_HEAD(&mvm->ftm_initiator.smooth.resp);
190
191 IWL_DEBUG_INFO(mvm,
192 "enable=%u, alpha=%u, age_jiffies=%u, thresh=(%u:%u)\n",
193 IWL_MVM_FTM_INITIATOR_ENABLE_SMOOTH,
194 IWL_MVM_FTM_INITIATOR_SMOOTH_ALPHA,
195 IWL_MVM_FTM_INITIATOR_SMOOTH_AGE_SEC * HZ,
196 IWL_MVM_FTM_INITIATOR_SMOOTH_OVERSHOOT,
197 IWL_MVM_FTM_INITIATOR_SMOOTH_UNDERSHOOT);
198 }
199
iwl_mvm_ftm_initiator_smooth_stop(struct iwl_mvm * mvm)200 void iwl_mvm_ftm_initiator_smooth_stop(struct iwl_mvm *mvm)
201 {
202 struct iwl_mvm_smooth_entry *se, *st;
203
204 list_for_each_entry_safe(se, st, &mvm->ftm_initiator.smooth.resp,
205 list) {
206 list_del(&se->list);
207 kfree(se);
208 }
209 }
210
211 static int
iwl_ftm_range_request_status_to_err(enum iwl_tof_range_request_status s)212 iwl_ftm_range_request_status_to_err(enum iwl_tof_range_request_status s)
213 {
214 switch (s) {
215 case IWL_TOF_RANGE_REQUEST_STATUS_SUCCESS:
216 return 0;
217 case IWL_TOF_RANGE_REQUEST_STATUS_BUSY:
218 return -EBUSY;
219 default:
220 WARN_ON_ONCE(1);
221 return -EIO;
222 }
223 }
224
iwl_mvm_ftm_cmd_v5(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct iwl_tof_range_req_cmd_v5 * cmd,struct cfg80211_pmsr_request * req)225 static void iwl_mvm_ftm_cmd_v5(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
226 struct iwl_tof_range_req_cmd_v5 *cmd,
227 struct cfg80211_pmsr_request *req)
228 {
229 int i;
230
231 cmd->request_id = req->cookie;
232 cmd->num_of_ap = req->n_peers;
233
234 /* use maximum for "no timeout" or bigger than what we can do */
235 if (!req->timeout || req->timeout > 255 * 100)
236 cmd->req_timeout = 255;
237 else
238 cmd->req_timeout = DIV_ROUND_UP(req->timeout, 100);
239
240 /*
241 * We treat it always as random, since if not we'll
242 * have filled our local address there instead.
243 */
244 cmd->macaddr_random = 1;
245 memcpy(cmd->macaddr_template, req->mac_addr, ETH_ALEN);
246 for (i = 0; i < ETH_ALEN; i++)
247 cmd->macaddr_mask[i] = ~req->mac_addr_mask[i];
248
249 if (vif->cfg.assoc)
250 memcpy(cmd->range_req_bssid, vif->bss_conf.bssid, ETH_ALEN);
251 else
252 eth_broadcast_addr(cmd->range_req_bssid);
253 }
254
iwl_mvm_ftm_cmd_common(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct iwl_tof_range_req_cmd_v9 * cmd,struct cfg80211_pmsr_request * req)255 static void iwl_mvm_ftm_cmd_common(struct iwl_mvm *mvm,
256 struct ieee80211_vif *vif,
257 #if defined(__linux__)
258 struct iwl_tof_range_req_cmd_v9 *cmd,
259 #elif defined(__FreeBSD__)
260 struct iwl_tof_range_req_cmd_v9 *cmd, /* XXX-BZ Probably better solved by a common struct in fw for top parts of the struct. */
261 #endif
262 struct cfg80211_pmsr_request *req)
263 {
264 int i;
265
266 cmd->initiator_flags =
267 cpu_to_le32(IWL_TOF_INITIATOR_FLAGS_MACADDR_RANDOM |
268 IWL_TOF_INITIATOR_FLAGS_NON_ASAP_SUPPORT);
269 cmd->request_id = req->cookie;
270 cmd->num_of_ap = req->n_peers;
271
272 /*
273 * Use a large value for "no timeout". Don't use the maximum value
274 * because of fw limitations.
275 */
276 if (req->timeout)
277 cmd->req_timeout_ms = cpu_to_le32(req->timeout);
278 else
279 cmd->req_timeout_ms = cpu_to_le32(0xfffff);
280
281 memcpy(cmd->macaddr_template, req->mac_addr, ETH_ALEN);
282 for (i = 0; i < ETH_ALEN; i++)
283 cmd->macaddr_mask[i] = ~req->mac_addr_mask[i];
284
285 if (vif->cfg.assoc) {
286 memcpy(cmd->range_req_bssid, vif->bss_conf.bssid, ETH_ALEN);
287
288 /* AP's TSF is only relevant if associated */
289 for (i = 0; i < req->n_peers; i++) {
290 if (req->peers[i].report_ap_tsf) {
291 struct iwl_mvm_vif *mvmvif =
292 iwl_mvm_vif_from_mac80211(vif);
293
294 cmd->tsf_mac_id = cpu_to_le32(mvmvif->id);
295 return;
296 }
297 }
298 } else {
299 eth_broadcast_addr(cmd->range_req_bssid);
300 }
301
302 /* Don't report AP's TSF */
303 cmd->tsf_mac_id = cpu_to_le32(0xff);
304 }
305
iwl_mvm_ftm_cmd_v8(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct iwl_tof_range_req_cmd_v8 * cmd,struct cfg80211_pmsr_request * req)306 static void iwl_mvm_ftm_cmd_v8(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
307 struct iwl_tof_range_req_cmd_v8 *cmd,
308 struct cfg80211_pmsr_request *req)
309 {
310 iwl_mvm_ftm_cmd_common(mvm, vif, (void *)cmd, req);
311 }
312
313 static int
iwl_mvm_ftm_target_chandef_v1(struct iwl_mvm * mvm,struct cfg80211_pmsr_request_peer * peer,u8 * channel,u8 * bandwidth,u8 * ctrl_ch_position)314 iwl_mvm_ftm_target_chandef_v1(struct iwl_mvm *mvm,
315 struct cfg80211_pmsr_request_peer *peer,
316 u8 *channel, u8 *bandwidth,
317 u8 *ctrl_ch_position)
318 {
319 u32 freq = peer->chandef.chan->center_freq;
320
321 *channel = ieee80211_frequency_to_channel(freq);
322
323 switch (peer->chandef.width) {
324 case NL80211_CHAN_WIDTH_20_NOHT:
325 *bandwidth = IWL_TOF_BW_20_LEGACY;
326 break;
327 case NL80211_CHAN_WIDTH_20:
328 *bandwidth = IWL_TOF_BW_20_HT;
329 break;
330 case NL80211_CHAN_WIDTH_40:
331 *bandwidth = IWL_TOF_BW_40;
332 break;
333 case NL80211_CHAN_WIDTH_80:
334 *bandwidth = IWL_TOF_BW_80;
335 break;
336 default:
337 IWL_ERR(mvm, "Unsupported BW in FTM request (%d)\n",
338 peer->chandef.width);
339 return -EINVAL;
340 }
341
342 *ctrl_ch_position = (peer->chandef.width > NL80211_CHAN_WIDTH_20) ?
343 iwl_mvm_get_ctrl_pos(&peer->chandef) : 0;
344
345 return 0;
346 }
347
348 static int
iwl_mvm_ftm_target_chandef_v2(struct iwl_mvm * mvm,struct cfg80211_pmsr_request_peer * peer,u8 * channel,u8 * format_bw,u8 * ctrl_ch_position)349 iwl_mvm_ftm_target_chandef_v2(struct iwl_mvm *mvm,
350 struct cfg80211_pmsr_request_peer *peer,
351 u8 *channel, u8 *format_bw,
352 u8 *ctrl_ch_position)
353 {
354 u32 freq = peer->chandef.chan->center_freq;
355 u8 cmd_ver;
356
357 *channel = ieee80211_frequency_to_channel(freq);
358
359 switch (peer->chandef.width) {
360 case NL80211_CHAN_WIDTH_20_NOHT:
361 *format_bw = IWL_LOCATION_FRAME_FORMAT_LEGACY;
362 *format_bw |= IWL_LOCATION_BW_20MHZ << LOCATION_BW_POS;
363 break;
364 case NL80211_CHAN_WIDTH_20:
365 *format_bw = IWL_LOCATION_FRAME_FORMAT_HT;
366 *format_bw |= IWL_LOCATION_BW_20MHZ << LOCATION_BW_POS;
367 break;
368 case NL80211_CHAN_WIDTH_40:
369 *format_bw = IWL_LOCATION_FRAME_FORMAT_HT;
370 *format_bw |= IWL_LOCATION_BW_40MHZ << LOCATION_BW_POS;
371 break;
372 case NL80211_CHAN_WIDTH_80:
373 *format_bw = IWL_LOCATION_FRAME_FORMAT_VHT;
374 *format_bw |= IWL_LOCATION_BW_80MHZ << LOCATION_BW_POS;
375 break;
376 case NL80211_CHAN_WIDTH_160:
377 cmd_ver = iwl_fw_lookup_cmd_ver(mvm->fw,
378 WIDE_ID(LOCATION_GROUP, TOF_RANGE_REQ_CMD),
379 IWL_FW_CMD_VER_UNKNOWN);
380
381 if (cmd_ver >= 13) {
382 *format_bw = IWL_LOCATION_FRAME_FORMAT_HE;
383 *format_bw |= IWL_LOCATION_BW_160MHZ << LOCATION_BW_POS;
384 break;
385 }
386 fallthrough;
387 default:
388 IWL_ERR(mvm, "Unsupported BW in FTM request (%d)\n",
389 peer->chandef.width);
390 return -EINVAL;
391 }
392
393 /* non EDCA based measurement must use HE preamble */
394 if (peer->ftm.trigger_based || peer->ftm.non_trigger_based)
395 *format_bw |= IWL_LOCATION_FRAME_FORMAT_HE;
396
397 *ctrl_ch_position = (peer->chandef.width > NL80211_CHAN_WIDTH_20) ?
398 iwl_mvm_get_ctrl_pos(&peer->chandef) : 0;
399
400 return 0;
401 }
402
403 static int
iwl_mvm_ftm_put_target_v2(struct iwl_mvm * mvm,struct cfg80211_pmsr_request_peer * peer,struct iwl_tof_range_req_ap_entry_v2 * target)404 iwl_mvm_ftm_put_target_v2(struct iwl_mvm *mvm,
405 struct cfg80211_pmsr_request_peer *peer,
406 struct iwl_tof_range_req_ap_entry_v2 *target)
407 {
408 int ret;
409
410 ret = iwl_mvm_ftm_target_chandef_v1(mvm, peer, &target->channel_num,
411 &target->bandwidth,
412 &target->ctrl_ch_position);
413 if (ret)
414 return ret;
415
416 memcpy(target->bssid, peer->addr, ETH_ALEN);
417 target->burst_period =
418 cpu_to_le16(peer->ftm.burst_period);
419 target->samples_per_burst = peer->ftm.ftms_per_burst;
420 target->num_of_bursts = peer->ftm.num_bursts_exp;
421 target->measure_type = 0; /* regular two-sided FTM */
422 target->retries_per_sample = peer->ftm.ftmr_retries;
423 target->asap_mode = peer->ftm.asap;
424 target->enable_dyn_ack = IWL_MVM_FTM_INITIATOR_DYNACK;
425
426 if (peer->ftm.request_lci)
427 target->location_req |= IWL_TOF_LOC_LCI;
428 if (peer->ftm.request_civicloc)
429 target->location_req |= IWL_TOF_LOC_CIVIC;
430
431 target->algo_type = IWL_MVM_FTM_INITIATOR_ALGO;
432
433 return 0;
434 }
435
436 #define FTM_PUT_FLAG(flag) (target->initiator_ap_flags |= \
437 cpu_to_le32(IWL_INITIATOR_AP_FLAGS_##flag))
438
439 static void
iwl_mvm_ftm_put_target_common(struct iwl_mvm * mvm,struct cfg80211_pmsr_request_peer * peer,struct iwl_tof_range_req_ap_entry_v6 * target)440 iwl_mvm_ftm_put_target_common(struct iwl_mvm *mvm,
441 struct cfg80211_pmsr_request_peer *peer,
442 struct iwl_tof_range_req_ap_entry_v6 *target)
443 {
444 memcpy(target->bssid, peer->addr, ETH_ALEN);
445 target->burst_period =
446 cpu_to_le16(peer->ftm.burst_period);
447 target->samples_per_burst = peer->ftm.ftms_per_burst;
448 target->num_of_bursts = peer->ftm.num_bursts_exp;
449 target->ftmr_max_retries = peer->ftm.ftmr_retries;
450 target->initiator_ap_flags = cpu_to_le32(0);
451
452 if (peer->ftm.asap)
453 FTM_PUT_FLAG(ASAP);
454
455 if (peer->ftm.request_lci)
456 FTM_PUT_FLAG(LCI_REQUEST);
457
458 if (peer->ftm.request_civicloc)
459 FTM_PUT_FLAG(CIVIC_REQUEST);
460
461 if (IWL_MVM_FTM_INITIATOR_DYNACK)
462 FTM_PUT_FLAG(DYN_ACK);
463
464 if (IWL_MVM_FTM_INITIATOR_ALGO == IWL_TOF_ALGO_TYPE_LINEAR_REG)
465 FTM_PUT_FLAG(ALGO_LR);
466 else if (IWL_MVM_FTM_INITIATOR_ALGO == IWL_TOF_ALGO_TYPE_FFT)
467 FTM_PUT_FLAG(ALGO_FFT);
468
469 if (peer->ftm.trigger_based)
470 FTM_PUT_FLAG(TB);
471 else if (peer->ftm.non_trigger_based)
472 FTM_PUT_FLAG(NON_TB);
473
474 if ((peer->ftm.trigger_based || peer->ftm.non_trigger_based) &&
475 peer->ftm.lmr_feedback)
476 FTM_PUT_FLAG(LMR_FEEDBACK);
477 }
478
479 static int
iwl_mvm_ftm_put_target_v3(struct iwl_mvm * mvm,struct cfg80211_pmsr_request_peer * peer,struct iwl_tof_range_req_ap_entry_v3 * target)480 iwl_mvm_ftm_put_target_v3(struct iwl_mvm *mvm,
481 struct cfg80211_pmsr_request_peer *peer,
482 struct iwl_tof_range_req_ap_entry_v3 *target)
483 {
484 int ret;
485
486 ret = iwl_mvm_ftm_target_chandef_v1(mvm, peer, &target->channel_num,
487 &target->bandwidth,
488 &target->ctrl_ch_position);
489 if (ret)
490 return ret;
491
492 /*
493 * Versions 3 and 4 has some common fields, so
494 * iwl_mvm_ftm_put_target_common() can be used for version 7 too.
495 */
496 iwl_mvm_ftm_put_target_common(mvm, peer, (void *)target);
497
498 return 0;
499 }
500
501 static int
iwl_mvm_ftm_put_target_v4(struct iwl_mvm * mvm,struct cfg80211_pmsr_request_peer * peer,struct iwl_tof_range_req_ap_entry_v4 * target)502 iwl_mvm_ftm_put_target_v4(struct iwl_mvm *mvm,
503 struct cfg80211_pmsr_request_peer *peer,
504 struct iwl_tof_range_req_ap_entry_v4 *target)
505 {
506 int ret;
507
508 ret = iwl_mvm_ftm_target_chandef_v2(mvm, peer, &target->channel_num,
509 &target->format_bw,
510 &target->ctrl_ch_position);
511 if (ret)
512 return ret;
513
514 iwl_mvm_ftm_put_target_common(mvm, peer, (void *)target);
515
516 return 0;
517 }
518
519 static int
iwl_mvm_ftm_put_target(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct cfg80211_pmsr_request_peer * peer,struct iwl_tof_range_req_ap_entry_v6 * target)520 iwl_mvm_ftm_put_target(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
521 struct cfg80211_pmsr_request_peer *peer,
522 struct iwl_tof_range_req_ap_entry_v6 *target)
523 {
524 int ret;
525
526 ret = iwl_mvm_ftm_target_chandef_v2(mvm, peer, &target->channel_num,
527 &target->format_bw,
528 &target->ctrl_ch_position);
529 if (ret)
530 return ret;
531
532 iwl_mvm_ftm_put_target_common(mvm, peer, target);
533
534 if (vif->cfg.assoc) {
535 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
536 struct ieee80211_sta *sta;
537 struct ieee80211_bss_conf *link_conf;
538 unsigned int link_id;
539
540 rcu_read_lock();
541 for_each_vif_active_link(vif, link_conf, link_id) {
542 if (memcmp(peer->addr, link_conf->bssid, ETH_ALEN))
543 continue;
544
545 target->sta_id = mvmvif->link[link_id]->ap_sta_id;
546 sta = rcu_dereference(mvm->fw_id_to_mac_id[target->sta_id]);
547 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) {
548 rcu_read_unlock();
549 return PTR_ERR_OR_ZERO(sta);
550 }
551
552 if (sta->mfp && (peer->ftm.trigger_based ||
553 peer->ftm.non_trigger_based))
554 FTM_PUT_FLAG(PMF);
555 break;
556 }
557 rcu_read_unlock();
558 } else {
559 target->sta_id = IWL_MVM_INVALID_STA;
560 }
561
562 /*
563 * TODO: Beacon interval is currently unknown, so use the common value
564 * of 100 TUs.
565 */
566 target->beacon_interval = cpu_to_le16(100);
567 return 0;
568 }
569
iwl_mvm_ftm_send_cmd(struct iwl_mvm * mvm,struct iwl_host_cmd * hcmd)570 static int iwl_mvm_ftm_send_cmd(struct iwl_mvm *mvm, struct iwl_host_cmd *hcmd)
571 {
572 u32 status;
573 int err = iwl_mvm_send_cmd_status(mvm, hcmd, &status);
574
575 if (!err && status) {
576 IWL_ERR(mvm, "FTM range request command failure, status: %u\n",
577 status);
578 err = iwl_ftm_range_request_status_to_err(status);
579 }
580
581 return err;
582 }
583
iwl_mvm_ftm_start_v5(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct cfg80211_pmsr_request * req)584 static int iwl_mvm_ftm_start_v5(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
585 struct cfg80211_pmsr_request *req)
586 {
587 struct iwl_tof_range_req_cmd_v5 cmd_v5;
588 struct iwl_host_cmd hcmd = {
589 .id = WIDE_ID(LOCATION_GROUP, TOF_RANGE_REQ_CMD),
590 .dataflags[0] = IWL_HCMD_DFL_DUP,
591 .data[0] = &cmd_v5,
592 .len[0] = sizeof(cmd_v5),
593 };
594 u8 i;
595 int err;
596
597 iwl_mvm_ftm_cmd_v5(mvm, vif, &cmd_v5, req);
598
599 for (i = 0; i < cmd_v5.num_of_ap; i++) {
600 struct cfg80211_pmsr_request_peer *peer = &req->peers[i];
601
602 err = iwl_mvm_ftm_put_target_v2(mvm, peer, &cmd_v5.ap[i]);
603 if (err)
604 return err;
605 }
606
607 return iwl_mvm_ftm_send_cmd(mvm, &hcmd);
608 }
609
iwl_mvm_ftm_start_v7(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct cfg80211_pmsr_request * req)610 static int iwl_mvm_ftm_start_v7(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
611 struct cfg80211_pmsr_request *req)
612 {
613 struct iwl_tof_range_req_cmd_v7 cmd_v7;
614 struct iwl_host_cmd hcmd = {
615 .id = WIDE_ID(LOCATION_GROUP, TOF_RANGE_REQ_CMD),
616 .dataflags[0] = IWL_HCMD_DFL_DUP,
617 .data[0] = &cmd_v7,
618 .len[0] = sizeof(cmd_v7),
619 };
620 u8 i;
621 int err;
622
623 /*
624 * Versions 7 and 8 has the same structure except from the responders
625 * list, so iwl_mvm_ftm_cmd() can be used for version 7 too.
626 */
627 iwl_mvm_ftm_cmd_v8(mvm, vif, (void *)&cmd_v7, req);
628
629 for (i = 0; i < cmd_v7.num_of_ap; i++) {
630 struct cfg80211_pmsr_request_peer *peer = &req->peers[i];
631
632 err = iwl_mvm_ftm_put_target_v3(mvm, peer, &cmd_v7.ap[i]);
633 if (err)
634 return err;
635 }
636
637 return iwl_mvm_ftm_send_cmd(mvm, &hcmd);
638 }
639
iwl_mvm_ftm_start_v8(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct cfg80211_pmsr_request * req)640 static int iwl_mvm_ftm_start_v8(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
641 struct cfg80211_pmsr_request *req)
642 {
643 struct iwl_tof_range_req_cmd_v8 cmd;
644 struct iwl_host_cmd hcmd = {
645 .id = WIDE_ID(LOCATION_GROUP, TOF_RANGE_REQ_CMD),
646 .dataflags[0] = IWL_HCMD_DFL_DUP,
647 .data[0] = &cmd,
648 .len[0] = sizeof(cmd),
649 };
650 u8 i;
651 int err;
652
653 iwl_mvm_ftm_cmd_v8(mvm, vif, (void *)&cmd, req);
654
655 for (i = 0; i < cmd.num_of_ap; i++) {
656 struct cfg80211_pmsr_request_peer *peer = &req->peers[i];
657
658 err = iwl_mvm_ftm_put_target_v4(mvm, peer, &cmd.ap[i]);
659 if (err)
660 return err;
661 }
662
663 return iwl_mvm_ftm_send_cmd(mvm, &hcmd);
664 }
665
iwl_mvm_ftm_start_v9(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct cfg80211_pmsr_request * req)666 static int iwl_mvm_ftm_start_v9(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
667 struct cfg80211_pmsr_request *req)
668 {
669 struct iwl_tof_range_req_cmd_v9 cmd;
670 struct iwl_host_cmd hcmd = {
671 .id = WIDE_ID(LOCATION_GROUP, TOF_RANGE_REQ_CMD),
672 .dataflags[0] = IWL_HCMD_DFL_DUP,
673 .data[0] = &cmd,
674 .len[0] = sizeof(cmd),
675 };
676 u8 i;
677 int err;
678
679 iwl_mvm_ftm_cmd_common(mvm, vif, &cmd, req);
680
681 for (i = 0; i < cmd.num_of_ap; i++) {
682 struct cfg80211_pmsr_request_peer *peer = &req->peers[i];
683 struct iwl_tof_range_req_ap_entry_v6 *target = &cmd.ap[i];
684
685 err = iwl_mvm_ftm_put_target(mvm, vif, peer, target);
686 if (err)
687 return err;
688 }
689
690 return iwl_mvm_ftm_send_cmd(mvm, &hcmd);
691 }
692
iter(struct ieee80211_hw * hw,struct ieee80211_vif * vif,struct ieee80211_sta * sta,struct ieee80211_key_conf * key,void * data)693 static void iter(struct ieee80211_hw *hw,
694 struct ieee80211_vif *vif,
695 struct ieee80211_sta *sta,
696 struct ieee80211_key_conf *key,
697 void *data)
698 {
699 struct iwl_tof_range_req_ap_entry_v6 *target = data;
700
701 if (!sta || memcmp(sta->addr, target->bssid, ETH_ALEN))
702 return;
703
704 WARN_ON(!sta->mfp);
705
706 if (WARN_ON(key->keylen > sizeof(target->tk)))
707 return;
708
709 memcpy(target->tk, key->key, key->keylen);
710 target->cipher = iwl_mvm_cipher_to_location_cipher(key->cipher);
711 WARN_ON(target->cipher == IWL_LOCATION_CIPHER_INVALID);
712 }
713
714 static void
iwl_mvm_ftm_set_secured_ranging(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct iwl_tof_range_req_ap_entry_v7 * target)715 iwl_mvm_ftm_set_secured_ranging(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
716 struct iwl_tof_range_req_ap_entry_v7 *target)
717 {
718 struct iwl_mvm_ftm_pasn_entry *entry;
719 u32 flags = le32_to_cpu(target->initiator_ap_flags);
720
721 if (!(flags & (IWL_INITIATOR_AP_FLAGS_NON_TB |
722 IWL_INITIATOR_AP_FLAGS_TB)))
723 return;
724
725 lockdep_assert_held(&mvm->mutex);
726
727 list_for_each_entry(entry, &mvm->ftm_initiator.pasn_list, list) {
728 if (memcmp(entry->addr, target->bssid, sizeof(entry->addr)))
729 continue;
730
731 target->cipher = entry->cipher;
732
733 if (entry->flags & IWL_MVM_PASN_FLAG_HAS_HLTK)
734 memcpy(target->hltk, entry->hltk, sizeof(target->hltk));
735 else
736 memset(target->hltk, 0, sizeof(target->hltk));
737
738 if (vif->cfg.assoc &&
739 !memcmp(vif->bss_conf.bssid, target->bssid,
740 sizeof(target->bssid)))
741 ieee80211_iter_keys(mvm->hw, vif, iter, target);
742 else
743 memcpy(target->tk, entry->tk, sizeof(target->tk));
744
745 memcpy(target->rx_pn, entry->rx_pn, sizeof(target->rx_pn));
746 memcpy(target->tx_pn, entry->tx_pn, sizeof(target->tx_pn));
747
748 target->initiator_ap_flags |=
749 cpu_to_le32(IWL_INITIATOR_AP_FLAGS_SECURED);
750 return;
751 }
752 }
753
754 static int
iwl_mvm_ftm_put_target_v7(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct cfg80211_pmsr_request_peer * peer,struct iwl_tof_range_req_ap_entry_v7 * target)755 iwl_mvm_ftm_put_target_v7(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
756 struct cfg80211_pmsr_request_peer *peer,
757 struct iwl_tof_range_req_ap_entry_v7 *target)
758 {
759 int err = iwl_mvm_ftm_put_target(mvm, vif, peer, (void *)target);
760 if (err)
761 return err;
762
763 iwl_mvm_ftm_set_secured_ranging(mvm, vif, target);
764 return err;
765 }
766
iwl_mvm_ftm_start_v11(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct cfg80211_pmsr_request * req)767 static int iwl_mvm_ftm_start_v11(struct iwl_mvm *mvm,
768 struct ieee80211_vif *vif,
769 struct cfg80211_pmsr_request *req)
770 {
771 struct iwl_tof_range_req_cmd_v11 cmd;
772 struct iwl_host_cmd hcmd = {
773 .id = WIDE_ID(LOCATION_GROUP, TOF_RANGE_REQ_CMD),
774 .dataflags[0] = IWL_HCMD_DFL_DUP,
775 .data[0] = &cmd,
776 .len[0] = sizeof(cmd),
777 };
778 u8 i;
779 int err;
780
781 iwl_mvm_ftm_cmd_common(mvm, vif, (void *)&cmd, req);
782
783 for (i = 0; i < cmd.num_of_ap; i++) {
784 struct cfg80211_pmsr_request_peer *peer = &req->peers[i];
785 struct iwl_tof_range_req_ap_entry_v7 *target = &cmd.ap[i];
786
787 err = iwl_mvm_ftm_put_target_v7(mvm, vif, peer, target);
788 if (err)
789 return err;
790 }
791
792 return iwl_mvm_ftm_send_cmd(mvm, &hcmd);
793 }
794
795 static void
iwl_mvm_ftm_set_ndp_params(struct iwl_mvm * mvm,struct iwl_tof_range_req_ap_entry_v8 * target)796 iwl_mvm_ftm_set_ndp_params(struct iwl_mvm *mvm,
797 struct iwl_tof_range_req_ap_entry_v8 *target)
798 {
799 /* Only 2 STS are supported on Tx */
800 u32 i2r_max_sts = IWL_MVM_FTM_I2R_MAX_STS > 1 ? 1 :
801 IWL_MVM_FTM_I2R_MAX_STS;
802
803 target->r2i_ndp_params = IWL_MVM_FTM_R2I_MAX_REP |
804 (IWL_MVM_FTM_R2I_MAX_STS << IWL_LOCATION_MAX_STS_POS);
805 target->i2r_ndp_params = IWL_MVM_FTM_I2R_MAX_REP |
806 (i2r_max_sts << IWL_LOCATION_MAX_STS_POS);
807 target->r2i_max_total_ltf = IWL_MVM_FTM_R2I_MAX_TOTAL_LTF;
808 target->i2r_max_total_ltf = IWL_MVM_FTM_I2R_MAX_TOTAL_LTF;
809 }
810
811 static int
iwl_mvm_ftm_put_target_v8(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct cfg80211_pmsr_request_peer * peer,struct iwl_tof_range_req_ap_entry_v8 * target)812 iwl_mvm_ftm_put_target_v8(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
813 struct cfg80211_pmsr_request_peer *peer,
814 struct iwl_tof_range_req_ap_entry_v8 *target)
815 {
816 u32 flags;
817 int ret = iwl_mvm_ftm_put_target_v7(mvm, vif, peer, (void *)target);
818
819 if (ret)
820 return ret;
821
822 iwl_mvm_ftm_set_ndp_params(mvm, target);
823
824 /*
825 * If secure LTF is turned off, replace the flag with PMF only
826 */
827 flags = le32_to_cpu(target->initiator_ap_flags);
828 if ((flags & IWL_INITIATOR_AP_FLAGS_SECURED) &&
829 !IWL_MVM_FTM_INITIATOR_SECURE_LTF) {
830 flags &= ~IWL_INITIATOR_AP_FLAGS_SECURED;
831 flags |= IWL_INITIATOR_AP_FLAGS_PMF;
832 target->initiator_ap_flags = cpu_to_le32(flags);
833 }
834
835 return 0;
836 }
837
iwl_mvm_ftm_start_v12(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct cfg80211_pmsr_request * req)838 static int iwl_mvm_ftm_start_v12(struct iwl_mvm *mvm,
839 struct ieee80211_vif *vif,
840 struct cfg80211_pmsr_request *req)
841 {
842 struct iwl_tof_range_req_cmd_v12 cmd;
843 struct iwl_host_cmd hcmd = {
844 .id = WIDE_ID(LOCATION_GROUP, TOF_RANGE_REQ_CMD),
845 .dataflags[0] = IWL_HCMD_DFL_DUP,
846 .data[0] = &cmd,
847 .len[0] = sizeof(cmd),
848 };
849 u8 i;
850 int err;
851
852 iwl_mvm_ftm_cmd_common(mvm, vif, (void *)&cmd, req);
853
854 for (i = 0; i < cmd.num_of_ap; i++) {
855 struct cfg80211_pmsr_request_peer *peer = &req->peers[i];
856 struct iwl_tof_range_req_ap_entry_v8 *target = &cmd.ap[i];
857
858 err = iwl_mvm_ftm_put_target_v8(mvm, vif, peer, target);
859 if (err)
860 return err;
861 }
862
863 return iwl_mvm_ftm_send_cmd(mvm, &hcmd);
864 }
865
iwl_mvm_ftm_start_v13(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct cfg80211_pmsr_request * req)866 static int iwl_mvm_ftm_start_v13(struct iwl_mvm *mvm,
867 struct ieee80211_vif *vif,
868 struct cfg80211_pmsr_request *req)
869 {
870 struct iwl_tof_range_req_cmd_v13 cmd;
871 struct iwl_host_cmd hcmd = {
872 .id = WIDE_ID(LOCATION_GROUP, TOF_RANGE_REQ_CMD),
873 .dataflags[0] = IWL_HCMD_DFL_DUP,
874 .data[0] = &cmd,
875 .len[0] = sizeof(cmd),
876 };
877 u8 i;
878 int err;
879
880 iwl_mvm_ftm_cmd_common(mvm, vif, (void *)&cmd, req);
881
882 for (i = 0; i < cmd.num_of_ap; i++) {
883 struct cfg80211_pmsr_request_peer *peer = &req->peers[i];
884 struct iwl_tof_range_req_ap_entry_v9 *target = &cmd.ap[i];
885
886 err = iwl_mvm_ftm_put_target_v8(mvm, vif, peer, (void *)target);
887 if (err)
888 return err;
889
890 if (peer->ftm.trigger_based || peer->ftm.non_trigger_based)
891 target->bss_color = peer->ftm.bss_color;
892
893 if (peer->ftm.non_trigger_based) {
894 target->min_time_between_msr =
895 cpu_to_le16(IWL_MVM_FTM_NON_TB_MIN_TIME_BETWEEN_MSR);
896 target->burst_period =
897 cpu_to_le16(IWL_MVM_FTM_NON_TB_MAX_TIME_BETWEEN_MSR);
898 } else {
899 target->min_time_between_msr = cpu_to_le16(0);
900 }
901
902 target->band =
903 iwl_mvm_phy_band_from_nl80211(peer->chandef.chan->band);
904 }
905
906 return iwl_mvm_ftm_send_cmd(mvm, &hcmd);
907 }
908
iwl_mvm_ftm_start(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct cfg80211_pmsr_request * req)909 int iwl_mvm_ftm_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
910 struct cfg80211_pmsr_request *req)
911 {
912 bool new_api = fw_has_api(&mvm->fw->ucode_capa,
913 IWL_UCODE_TLV_API_FTM_NEW_RANGE_REQ);
914 int err;
915
916 lockdep_assert_held(&mvm->mutex);
917
918 if (mvm->ftm_initiator.req)
919 return -EBUSY;
920
921 if (new_api) {
922 u8 cmd_ver = iwl_fw_lookup_cmd_ver(mvm->fw,
923 WIDE_ID(LOCATION_GROUP, TOF_RANGE_REQ_CMD),
924 IWL_FW_CMD_VER_UNKNOWN);
925
926 switch (cmd_ver) {
927 case 13:
928 err = iwl_mvm_ftm_start_v13(mvm, vif, req);
929 break;
930 case 12:
931 err = iwl_mvm_ftm_start_v12(mvm, vif, req);
932 break;
933 case 11:
934 err = iwl_mvm_ftm_start_v11(mvm, vif, req);
935 break;
936 case 9:
937 case 10:
938 err = iwl_mvm_ftm_start_v9(mvm, vif, req);
939 break;
940 case 8:
941 err = iwl_mvm_ftm_start_v8(mvm, vif, req);
942 break;
943 default:
944 err = iwl_mvm_ftm_start_v7(mvm, vif, req);
945 break;
946 }
947 } else {
948 err = iwl_mvm_ftm_start_v5(mvm, vif, req);
949 }
950
951 if (!err) {
952 mvm->ftm_initiator.req = req;
953 mvm->ftm_initiator.req_wdev = ieee80211_vif_to_wdev(vif);
954 }
955
956 return err;
957 }
958
iwl_mvm_ftm_abort(struct iwl_mvm * mvm,struct cfg80211_pmsr_request * req)959 void iwl_mvm_ftm_abort(struct iwl_mvm *mvm, struct cfg80211_pmsr_request *req)
960 {
961 struct iwl_tof_range_abort_cmd cmd = {
962 .request_id = req->cookie,
963 };
964
965 lockdep_assert_held(&mvm->mutex);
966
967 if (req != mvm->ftm_initiator.req)
968 return;
969
970 iwl_mvm_ftm_reset(mvm);
971
972 if (iwl_mvm_send_cmd_pdu(mvm, WIDE_ID(LOCATION_GROUP, TOF_RANGE_ABORT_CMD),
973 0, sizeof(cmd), &cmd))
974 IWL_ERR(mvm, "failed to abort FTM process\n");
975 }
976
iwl_mvm_ftm_find_peer(struct cfg80211_pmsr_request * req,const u8 * addr)977 static int iwl_mvm_ftm_find_peer(struct cfg80211_pmsr_request *req,
978 const u8 *addr)
979 {
980 int i;
981
982 for (i = 0; i < req->n_peers; i++) {
983 struct cfg80211_pmsr_request_peer *peer = &req->peers[i];
984
985 if (ether_addr_equal_unaligned(peer->addr, addr))
986 return i;
987 }
988
989 return -ENOENT;
990 }
991
iwl_mvm_ftm_get_host_time(struct iwl_mvm * mvm,__le32 fw_gp2_ts)992 static u64 iwl_mvm_ftm_get_host_time(struct iwl_mvm *mvm, __le32 fw_gp2_ts)
993 {
994 u32 gp2_ts = le32_to_cpu(fw_gp2_ts);
995 u32 curr_gp2, diff;
996 u64 now_from_boot_ns;
997
998 iwl_mvm_get_sync_time(mvm, CLOCK_BOOTTIME, &curr_gp2,
999 &now_from_boot_ns, NULL);
1000
1001 if (curr_gp2 >= gp2_ts)
1002 diff = curr_gp2 - gp2_ts;
1003 else
1004 diff = curr_gp2 + (U32_MAX - gp2_ts + 1);
1005
1006 return now_from_boot_ns - (u64)diff * 1000;
1007 }
1008
iwl_mvm_ftm_get_lci_civic(struct iwl_mvm * mvm,struct cfg80211_pmsr_result * res)1009 static void iwl_mvm_ftm_get_lci_civic(struct iwl_mvm *mvm,
1010 struct cfg80211_pmsr_result *res)
1011 {
1012 struct iwl_mvm_loc_entry *entry;
1013
1014 list_for_each_entry(entry, &mvm->ftm_initiator.loc_list, list) {
1015 if (!ether_addr_equal_unaligned(res->addr, entry->addr))
1016 continue;
1017
1018 if (entry->lci_len) {
1019 res->ftm.lci_len = entry->lci_len;
1020 res->ftm.lci = entry->buf;
1021 }
1022
1023 if (entry->civic_len) {
1024 res->ftm.civicloc_len = entry->civic_len;
1025 res->ftm.civicloc = entry->buf + entry->lci_len;
1026 }
1027
1028 /* we found the entry we needed */
1029 break;
1030 }
1031 }
1032
iwl_mvm_ftm_range_resp_valid(struct iwl_mvm * mvm,u8 request_id,u8 num_of_aps)1033 static int iwl_mvm_ftm_range_resp_valid(struct iwl_mvm *mvm, u8 request_id,
1034 u8 num_of_aps)
1035 {
1036 lockdep_assert_held(&mvm->mutex);
1037
1038 if (request_id != (u8)mvm->ftm_initiator.req->cookie) {
1039 IWL_ERR(mvm, "Request ID mismatch, got %u, active %u\n",
1040 request_id, (u8)mvm->ftm_initiator.req->cookie);
1041 return -EINVAL;
1042 }
1043
1044 if (num_of_aps > mvm->ftm_initiator.req->n_peers) {
1045 IWL_ERR(mvm, "FTM range response invalid\n");
1046 return -EINVAL;
1047 }
1048
1049 return 0;
1050 }
1051
iwl_mvm_ftm_rtt_smoothing(struct iwl_mvm * mvm,struct cfg80211_pmsr_result * res)1052 static void iwl_mvm_ftm_rtt_smoothing(struct iwl_mvm *mvm,
1053 struct cfg80211_pmsr_result *res)
1054 {
1055 struct iwl_mvm_smooth_entry *resp = NULL, *iter;
1056 s64 rtt_avg, rtt = res->ftm.rtt_avg;
1057 u32 undershoot, overshoot;
1058 u8 alpha;
1059
1060 if (!IWL_MVM_FTM_INITIATOR_ENABLE_SMOOTH)
1061 return;
1062
1063 WARN_ON(rtt < 0);
1064
1065 if (res->status != NL80211_PMSR_STATUS_SUCCESS) {
1066 IWL_DEBUG_INFO(mvm,
1067 ": %pM: ignore failed measurement. Status=%u\n",
1068 res->addr, res->status);
1069 return;
1070 }
1071
1072 list_for_each_entry(iter, &mvm->ftm_initiator.smooth.resp, list) {
1073 if (!memcmp(res->addr, iter->addr, ETH_ALEN)) {
1074 resp = iter;
1075 break;
1076 }
1077 }
1078
1079 if (!resp) {
1080 resp = kzalloc(sizeof(*resp), GFP_KERNEL);
1081 if (!resp)
1082 return;
1083
1084 memcpy(resp->addr, res->addr, ETH_ALEN);
1085 list_add_tail(&resp->list, &mvm->ftm_initiator.smooth.resp);
1086
1087 resp->rtt_avg = rtt;
1088
1089 IWL_DEBUG_INFO(mvm, "new: %pM: rtt_avg=%lld\n",
1090 resp->addr, resp->rtt_avg);
1091 goto update_time;
1092 }
1093
1094 if (res->host_time - resp->host_time >
1095 IWL_MVM_FTM_INITIATOR_SMOOTH_AGE_SEC * 1000000000) {
1096 resp->rtt_avg = rtt;
1097
1098 IWL_DEBUG_INFO(mvm, "expired: %pM: rtt_avg=%lld\n",
1099 resp->addr, resp->rtt_avg);
1100 goto update_time;
1101 }
1102
1103 /* Smooth the results based on the tracked RTT average */
1104 undershoot = IWL_MVM_FTM_INITIATOR_SMOOTH_UNDERSHOOT;
1105 overshoot = IWL_MVM_FTM_INITIATOR_SMOOTH_OVERSHOOT;
1106 alpha = IWL_MVM_FTM_INITIATOR_SMOOTH_ALPHA;
1107
1108 rtt_avg = div_s64(alpha * rtt + (100 - alpha) * resp->rtt_avg, 100);
1109
1110 IWL_DEBUG_INFO(mvm,
1111 "%pM: prev rtt_avg=%lld, new rtt_avg=%lld, rtt=%lld\n",
1112 resp->addr, resp->rtt_avg, rtt_avg, rtt);
1113
1114 /*
1115 * update the responder's average RTT results regardless of
1116 * the under/over shoot logic below
1117 */
1118 resp->rtt_avg = rtt_avg;
1119
1120 /* smooth the results */
1121 if (rtt_avg > rtt && (rtt_avg - rtt) > undershoot) {
1122 res->ftm.rtt_avg = rtt_avg;
1123
1124 IWL_DEBUG_INFO(mvm,
1125 "undershoot: val=%lld\n",
1126 (rtt_avg - rtt));
1127 } else if (rtt_avg < rtt && (rtt - rtt_avg) >
1128 overshoot) {
1129 res->ftm.rtt_avg = rtt_avg;
1130 IWL_DEBUG_INFO(mvm,
1131 "overshoot: val=%lld\n",
1132 (rtt - rtt_avg));
1133 }
1134
1135 update_time:
1136 resp->host_time = res->host_time;
1137 }
1138
iwl_mvm_debug_range_resp(struct iwl_mvm * mvm,u8 index,struct cfg80211_pmsr_result * res)1139 static void iwl_mvm_debug_range_resp(struct iwl_mvm *mvm, u8 index,
1140 struct cfg80211_pmsr_result *res)
1141 {
1142 s64 rtt_avg = div_s64(res->ftm.rtt_avg * 100, 6666);
1143
1144 IWL_DEBUG_INFO(mvm, "entry %d\n", index);
1145 IWL_DEBUG_INFO(mvm, "\tstatus: %d\n", res->status);
1146 IWL_DEBUG_INFO(mvm, "\tBSSID: %pM\n", res->addr);
1147 IWL_DEBUG_INFO(mvm, "\thost time: %llu\n", res->host_time);
1148 IWL_DEBUG_INFO(mvm, "\tburst index: %d\n", res->ftm.burst_index);
1149 IWL_DEBUG_INFO(mvm, "\tsuccess num: %u\n", res->ftm.num_ftmr_successes);
1150 IWL_DEBUG_INFO(mvm, "\trssi: %d\n", res->ftm.rssi_avg);
1151 IWL_DEBUG_INFO(mvm, "\trssi spread: %d\n", res->ftm.rssi_spread);
1152 IWL_DEBUG_INFO(mvm, "\trtt: %lld\n", res->ftm.rtt_avg);
1153 IWL_DEBUG_INFO(mvm, "\trtt var: %llu\n", res->ftm.rtt_variance);
1154 IWL_DEBUG_INFO(mvm, "\trtt spread: %llu\n", res->ftm.rtt_spread);
1155 IWL_DEBUG_INFO(mvm, "\tdistance: %lld\n", rtt_avg);
1156 }
1157
1158 static void
iwl_mvm_ftm_pasn_update_pn(struct iwl_mvm * mvm,struct iwl_tof_range_rsp_ap_entry_ntfy_v6 * fw_ap)1159 iwl_mvm_ftm_pasn_update_pn(struct iwl_mvm *mvm,
1160 struct iwl_tof_range_rsp_ap_entry_ntfy_v6 *fw_ap)
1161 {
1162 struct iwl_mvm_ftm_pasn_entry *entry;
1163
1164 lockdep_assert_held(&mvm->mutex);
1165
1166 list_for_each_entry(entry, &mvm->ftm_initiator.pasn_list, list) {
1167 if (memcmp(fw_ap->bssid, entry->addr, sizeof(entry->addr)))
1168 continue;
1169
1170 memcpy(entry->rx_pn, fw_ap->rx_pn, sizeof(entry->rx_pn));
1171 memcpy(entry->tx_pn, fw_ap->tx_pn, sizeof(entry->tx_pn));
1172 return;
1173 }
1174 }
1175
iwl_mvm_ftm_get_range_resp_ver(struct iwl_mvm * mvm)1176 static u8 iwl_mvm_ftm_get_range_resp_ver(struct iwl_mvm *mvm)
1177 {
1178 if (!fw_has_api(&mvm->fw->ucode_capa,
1179 IWL_UCODE_TLV_API_FTM_NEW_RANGE_REQ))
1180 return 5;
1181
1182 /* Starting from version 8, the FW advertises the version */
1183 if (mvm->cmd_ver.range_resp >= 8)
1184 return mvm->cmd_ver.range_resp;
1185 else if (fw_has_api(&mvm->fw->ucode_capa,
1186 IWL_UCODE_TLV_API_FTM_RTT_ACCURACY))
1187 return 7;
1188
1189 /* The first version of the new range request API */
1190 return 6;
1191 }
1192
iwl_mvm_ftm_resp_size_validation(u8 ver,unsigned int pkt_len)1193 static bool iwl_mvm_ftm_resp_size_validation(u8 ver, unsigned int pkt_len)
1194 {
1195 switch (ver) {
1196 case 9:
1197 case 8:
1198 return pkt_len == sizeof(struct iwl_tof_range_rsp_ntfy_v8);
1199 case 7:
1200 return pkt_len == sizeof(struct iwl_tof_range_rsp_ntfy_v7);
1201 case 6:
1202 return pkt_len == sizeof(struct iwl_tof_range_rsp_ntfy_v6);
1203 case 5:
1204 return pkt_len == sizeof(struct iwl_tof_range_rsp_ntfy_v5);
1205 default:
1206 WARN_ONCE(1, "FTM: unsupported range response version %u", ver);
1207 return false;
1208 }
1209 }
1210
iwl_mvm_ftm_range_resp(struct iwl_mvm * mvm,struct iwl_rx_cmd_buffer * rxb)1211 void iwl_mvm_ftm_range_resp(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
1212 {
1213 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1214 unsigned int pkt_len = iwl_rx_packet_payload_len(pkt);
1215 struct iwl_tof_range_rsp_ntfy_v5 *fw_resp_v5 = (void *)pkt->data;
1216 struct iwl_tof_range_rsp_ntfy_v6 *fw_resp_v6 = (void *)pkt->data;
1217 struct iwl_tof_range_rsp_ntfy_v7 *fw_resp_v7 = (void *)pkt->data;
1218 struct iwl_tof_range_rsp_ntfy_v8 *fw_resp_v8 = (void *)pkt->data;
1219 int i;
1220 bool new_api = fw_has_api(&mvm->fw->ucode_capa,
1221 IWL_UCODE_TLV_API_FTM_NEW_RANGE_REQ);
1222 u8 num_of_aps, last_in_batch;
1223 u8 notif_ver = iwl_mvm_ftm_get_range_resp_ver(mvm);
1224
1225 lockdep_assert_held(&mvm->mutex);
1226
1227 if (!mvm->ftm_initiator.req) {
1228 return;
1229 }
1230
1231 if (unlikely(!iwl_mvm_ftm_resp_size_validation(notif_ver, pkt_len)))
1232 return;
1233
1234 if (new_api) {
1235 if (iwl_mvm_ftm_range_resp_valid(mvm, fw_resp_v8->request_id,
1236 fw_resp_v8->num_of_aps))
1237 return;
1238
1239 num_of_aps = fw_resp_v8->num_of_aps;
1240 last_in_batch = fw_resp_v8->last_report;
1241 } else {
1242 if (iwl_mvm_ftm_range_resp_valid(mvm, fw_resp_v5->request_id,
1243 fw_resp_v5->num_of_aps))
1244 return;
1245
1246 num_of_aps = fw_resp_v5->num_of_aps;
1247 last_in_batch = fw_resp_v5->last_in_batch;
1248 }
1249
1250 IWL_DEBUG_INFO(mvm, "Range response received\n");
1251 IWL_DEBUG_INFO(mvm, "request id: %lld, num of entries: %u\n",
1252 mvm->ftm_initiator.req->cookie, num_of_aps);
1253
1254 for (i = 0; i < num_of_aps && i < IWL_MVM_TOF_MAX_APS; i++) {
1255 struct cfg80211_pmsr_result result = {};
1256 struct iwl_tof_range_rsp_ap_entry_ntfy_v6 *fw_ap;
1257 int peer_idx;
1258
1259 if (new_api) {
1260 if (notif_ver >= 8) {
1261 fw_ap = &fw_resp_v8->ap[i];
1262 iwl_mvm_ftm_pasn_update_pn(mvm, fw_ap);
1263 } else if (notif_ver == 7) {
1264 fw_ap = (void *)&fw_resp_v7->ap[i];
1265 } else {
1266 fw_ap = (void *)&fw_resp_v6->ap[i];
1267 }
1268
1269 result.final = fw_ap->last_burst;
1270 result.ap_tsf = le32_to_cpu(fw_ap->start_tsf);
1271 result.ap_tsf_valid = 1;
1272 } else {
1273 /* the first part is the same for old and new APIs */
1274 fw_ap = (void *)&fw_resp_v5->ap[i];
1275 /*
1276 * FIXME: the firmware needs to report this, we don't
1277 * even know the number of bursts the responder picked
1278 * (if we asked it to)
1279 */
1280 result.final = 0;
1281 }
1282
1283 peer_idx = iwl_mvm_ftm_find_peer(mvm->ftm_initiator.req,
1284 fw_ap->bssid);
1285 if (peer_idx < 0) {
1286 IWL_WARN(mvm,
1287 "Unknown address (%pM, target #%d) in FTM response\n",
1288 fw_ap->bssid, i);
1289 continue;
1290 }
1291
1292 switch (fw_ap->measure_status) {
1293 case IWL_TOF_ENTRY_SUCCESS:
1294 result.status = NL80211_PMSR_STATUS_SUCCESS;
1295 break;
1296 case IWL_TOF_ENTRY_TIMING_MEASURE_TIMEOUT:
1297 result.status = NL80211_PMSR_STATUS_TIMEOUT;
1298 break;
1299 case IWL_TOF_ENTRY_NO_RESPONSE:
1300 result.status = NL80211_PMSR_STATUS_FAILURE;
1301 result.ftm.failure_reason =
1302 NL80211_PMSR_FTM_FAILURE_NO_RESPONSE;
1303 break;
1304 case IWL_TOF_ENTRY_REQUEST_REJECTED:
1305 result.status = NL80211_PMSR_STATUS_FAILURE;
1306 result.ftm.failure_reason =
1307 NL80211_PMSR_FTM_FAILURE_PEER_BUSY;
1308 result.ftm.busy_retry_time = fw_ap->refusal_period;
1309 break;
1310 default:
1311 result.status = NL80211_PMSR_STATUS_FAILURE;
1312 result.ftm.failure_reason =
1313 NL80211_PMSR_FTM_FAILURE_UNSPECIFIED;
1314 break;
1315 }
1316 memcpy(result.addr, fw_ap->bssid, ETH_ALEN);
1317 result.host_time = iwl_mvm_ftm_get_host_time(mvm,
1318 fw_ap->timestamp);
1319 result.type = NL80211_PMSR_TYPE_FTM;
1320 result.ftm.burst_index = mvm->ftm_initiator.responses[peer_idx];
1321 mvm->ftm_initiator.responses[peer_idx]++;
1322 result.ftm.rssi_avg = fw_ap->rssi;
1323 result.ftm.rssi_avg_valid = 1;
1324 result.ftm.rssi_spread = fw_ap->rssi_spread;
1325 result.ftm.rssi_spread_valid = 1;
1326 result.ftm.rtt_avg = (s32)le32_to_cpu(fw_ap->rtt);
1327 result.ftm.rtt_avg_valid = 1;
1328 result.ftm.rtt_variance = le32_to_cpu(fw_ap->rtt_variance);
1329 result.ftm.rtt_variance_valid = 1;
1330 result.ftm.rtt_spread = le32_to_cpu(fw_ap->rtt_spread);
1331 result.ftm.rtt_spread_valid = 1;
1332
1333 iwl_mvm_ftm_get_lci_civic(mvm, &result);
1334
1335 iwl_mvm_ftm_rtt_smoothing(mvm, &result);
1336
1337 cfg80211_pmsr_report(mvm->ftm_initiator.req_wdev,
1338 mvm->ftm_initiator.req,
1339 &result, GFP_KERNEL);
1340
1341 if (fw_has_api(&mvm->fw->ucode_capa,
1342 IWL_UCODE_TLV_API_FTM_RTT_ACCURACY))
1343 IWL_DEBUG_INFO(mvm, "RTT confidence: %u\n",
1344 fw_ap->rttConfidence);
1345
1346 iwl_mvm_debug_range_resp(mvm, i, &result);
1347 }
1348
1349 if (last_in_batch) {
1350 cfg80211_pmsr_complete(mvm->ftm_initiator.req_wdev,
1351 mvm->ftm_initiator.req,
1352 GFP_KERNEL);
1353 iwl_mvm_ftm_reset(mvm);
1354 }
1355 }
1356
iwl_mvm_ftm_lc_notif(struct iwl_mvm * mvm,struct iwl_rx_cmd_buffer * rxb)1357 void iwl_mvm_ftm_lc_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
1358 {
1359 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1360 const struct ieee80211_mgmt *mgmt = (void *)pkt->data;
1361 size_t len = iwl_rx_packet_payload_len(pkt);
1362 struct iwl_mvm_loc_entry *entry;
1363 const u8 *ies, *lci, *civic, *msr_ie;
1364 size_t ies_len, lci_len = 0, civic_len = 0;
1365 size_t baselen = IEEE80211_MIN_ACTION_SIZE +
1366 sizeof(mgmt->u.action.u.ftm);
1367 static const u8 rprt_type_lci = IEEE80211_SPCT_MSR_RPRT_TYPE_LCI;
1368 static const u8 rprt_type_civic = IEEE80211_SPCT_MSR_RPRT_TYPE_CIVIC;
1369
1370 if (len <= baselen)
1371 return;
1372
1373 lockdep_assert_held(&mvm->mutex);
1374
1375 ies = mgmt->u.action.u.ftm.variable;
1376 ies_len = len - baselen;
1377
1378 msr_ie = cfg80211_find_ie_match(WLAN_EID_MEASURE_REPORT, ies, ies_len,
1379 &rprt_type_lci, 1, 4);
1380 if (msr_ie) {
1381 lci = msr_ie + 2;
1382 lci_len = msr_ie[1];
1383 }
1384
1385 msr_ie = cfg80211_find_ie_match(WLAN_EID_MEASURE_REPORT, ies, ies_len,
1386 &rprt_type_civic, 1, 4);
1387 if (msr_ie) {
1388 civic = msr_ie + 2;
1389 civic_len = msr_ie[1];
1390 }
1391
1392 entry = kmalloc(sizeof(*entry) + lci_len + civic_len, GFP_KERNEL);
1393 if (!entry)
1394 return;
1395
1396 memcpy(entry->addr, mgmt->bssid, ETH_ALEN);
1397
1398 entry->lci_len = lci_len;
1399 if (lci_len)
1400 memcpy(entry->buf, lci, lci_len);
1401
1402 entry->civic_len = civic_len;
1403 if (civic_len)
1404 memcpy(entry->buf + lci_len, civic, civic_len);
1405
1406 list_add_tail(&entry->list, &mvm->ftm_initiator.loc_list);
1407 }
1408