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