1 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
2 /*
3  * Copyright (C) 2012-2014, 2018-2021 Intel Corporation
4  * Copyright (C) 2013-2015 Intel Mobile Communications GmbH
5  * Copyright (C) 2016-2017 Intel Deutschland GmbH
6  */
7 #include <linux/etherdevice.h>
8 #include <net/mac80211.h>
9 #include <linux/crc32.h>
10 
11 #include "mvm.h"
12 #include "fw/api/scan.h"
13 #include "iwl-io.h"
14 
15 #define IWL_DENSE_EBS_SCAN_RATIO 5
16 #define IWL_SPARSE_EBS_SCAN_RATIO 1
17 
18 #define IWL_SCAN_DWELL_ACTIVE		10
19 #define IWL_SCAN_DWELL_PASSIVE		110
20 #define IWL_SCAN_DWELL_FRAGMENTED	44
21 #define IWL_SCAN_DWELL_EXTENDED		90
22 #define IWL_SCAN_NUM_OF_FRAGS		3
23 #define IWL_SCAN_LAST_2_4_CHN		14
24 
25 /* adaptive dwell max budget time [TU] for full scan */
26 #define IWL_SCAN_ADWELL_MAX_BUDGET_FULL_SCAN 300
27 /* adaptive dwell max budget time [TU] for directed scan */
28 #define IWL_SCAN_ADWELL_MAX_BUDGET_DIRECTED_SCAN 100
29 /* adaptive dwell default high band APs number */
30 #define IWL_SCAN_ADWELL_DEFAULT_HB_N_APS 8
31 /* adaptive dwell default low band APs number */
32 #define IWL_SCAN_ADWELL_DEFAULT_LB_N_APS 2
33 /* adaptive dwell default APs number in social channels (1, 6, 11) */
34 #define IWL_SCAN_ADWELL_DEFAULT_N_APS_SOCIAL 10
35 /* number of scan channels */
36 #define IWL_SCAN_NUM_CHANNELS 112
37 /* adaptive dwell number of APs override mask for p2p friendly GO */
38 #define IWL_SCAN_ADWELL_N_APS_GO_FRIENDLY_BIT BIT(20)
39 /* adaptive dwell number of APs override mask for social channels */
40 #define IWL_SCAN_ADWELL_N_APS_SOCIAL_CHS_BIT BIT(21)
41 /* adaptive dwell number of APs override for p2p friendly GO channels */
42 #define IWL_SCAN_ADWELL_N_APS_GO_FRIENDLY 10
43 /* adaptive dwell number of APs override for social channels */
44 #define IWL_SCAN_ADWELL_N_APS_SOCIAL_CHS 2
45 
46 /* minimal number of 2GHz and 5GHz channels in the regular scan request */
47 #define IWL_MVM_6GHZ_PASSIVE_SCAN_MIN_CHANS 4
48 
49 struct iwl_mvm_scan_timing_params {
50 	u32 suspend_time;
51 	u32 max_out_time;
52 };
53 
54 static struct iwl_mvm_scan_timing_params scan_timing[] = {
55 	[IWL_SCAN_TYPE_UNASSOC] = {
56 		.suspend_time = 0,
57 		.max_out_time = 0,
58 	},
59 	[IWL_SCAN_TYPE_WILD] = {
60 		.suspend_time = 30,
61 		.max_out_time = 120,
62 	},
63 	[IWL_SCAN_TYPE_MILD] = {
64 		.suspend_time = 120,
65 		.max_out_time = 120,
66 	},
67 	[IWL_SCAN_TYPE_FRAGMENTED] = {
68 		.suspend_time = 95,
69 		.max_out_time = 44,
70 	},
71 	[IWL_SCAN_TYPE_FAST_BALANCE] = {
72 		.suspend_time = 30,
73 		.max_out_time = 37,
74 	},
75 };
76 
77 struct iwl_mvm_scan_params {
78 	/* For CDB this is low band scan type, for non-CDB - type. */
79 	enum iwl_mvm_scan_type type;
80 	enum iwl_mvm_scan_type hb_type;
81 	u32 n_channels;
82 	u16 delay;
83 	int n_ssids;
84 	struct cfg80211_ssid *ssids;
85 	struct ieee80211_channel **channels;
86 	u32 flags;
87 	u8 *mac_addr;
88 	u8 *mac_addr_mask;
89 	bool no_cck;
90 	bool pass_all;
91 	int n_match_sets;
92 	struct iwl_scan_probe_req preq;
93 	struct cfg80211_match_set *match_sets;
94 	int n_scan_plans;
95 	struct cfg80211_sched_scan_plan *scan_plans;
96 	bool iter_notif;
97 	struct cfg80211_scan_6ghz_params *scan_6ghz_params;
98 	u32 n_6ghz_params;
99 	bool scan_6ghz;
100 	bool enable_6ghz_passive;
101 };
102 
103 static inline void *iwl_mvm_get_scan_req_umac_data(struct iwl_mvm *mvm)
104 {
105 	struct iwl_scan_req_umac *cmd = mvm->scan_cmd;
106 
107 	if (iwl_mvm_is_adaptive_dwell_v2_supported(mvm))
108 		return (void *)&cmd->v8.data;
109 
110 	if (iwl_mvm_is_adaptive_dwell_supported(mvm))
111 		return (void *)&cmd->v7.data;
112 
113 	if (iwl_mvm_cdb_scan_api(mvm))
114 		return (void *)&cmd->v6.data;
115 
116 	return (void *)&cmd->v1.data;
117 }
118 
119 static inline struct iwl_scan_umac_chan_param *
120 iwl_mvm_get_scan_req_umac_channel(struct iwl_mvm *mvm)
121 {
122 	struct iwl_scan_req_umac *cmd = mvm->scan_cmd;
123 
124 	if (iwl_mvm_is_adaptive_dwell_v2_supported(mvm))
125 		return &cmd->v8.channel;
126 
127 	if (iwl_mvm_is_adaptive_dwell_supported(mvm))
128 		return &cmd->v7.channel;
129 
130 	if (iwl_mvm_cdb_scan_api(mvm))
131 		return &cmd->v6.channel;
132 
133 	return &cmd->v1.channel;
134 }
135 
136 static u8 iwl_mvm_scan_rx_ant(struct iwl_mvm *mvm)
137 {
138 	if (mvm->scan_rx_ant != ANT_NONE)
139 		return mvm->scan_rx_ant;
140 	return iwl_mvm_get_valid_rx_ant(mvm);
141 }
142 
143 static inline __le16 iwl_mvm_scan_rx_chain(struct iwl_mvm *mvm)
144 {
145 	u16 rx_chain;
146 	u8 rx_ant;
147 
148 	rx_ant = iwl_mvm_scan_rx_ant(mvm);
149 	rx_chain = rx_ant << PHY_RX_CHAIN_VALID_POS;
150 	rx_chain |= rx_ant << PHY_RX_CHAIN_FORCE_MIMO_SEL_POS;
151 	rx_chain |= rx_ant << PHY_RX_CHAIN_FORCE_SEL_POS;
152 	rx_chain |= 0x1 << PHY_RX_CHAIN_DRIVER_FORCE_POS;
153 	return cpu_to_le16(rx_chain);
154 }
155 
156 static inline __le32
157 iwl_mvm_scan_rate_n_flags(struct iwl_mvm *mvm, enum nl80211_band band,
158 			  bool no_cck)
159 {
160 	u32 tx_ant;
161 
162 	iwl_mvm_toggle_tx_ant(mvm, &mvm->scan_last_antenna_idx);
163 	tx_ant = BIT(mvm->scan_last_antenna_idx) << RATE_MCS_ANT_POS;
164 
165 	if (band == NL80211_BAND_2GHZ && !no_cck)
166 		return cpu_to_le32(IWL_RATE_1M_PLCP | RATE_MCS_CCK_MSK |
167 				   tx_ant);
168 	else
169 		return cpu_to_le32(IWL_RATE_6M_PLCP | tx_ant);
170 }
171 
172 static void iwl_mvm_scan_condition_iterator(void *data, u8 *mac,
173 					    struct ieee80211_vif *vif)
174 {
175 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
176 	int *global_cnt = data;
177 
178 	if (vif->type != NL80211_IFTYPE_P2P_DEVICE && mvmvif->phy_ctxt &&
179 	    mvmvif->phy_ctxt->id < NUM_PHY_CTX)
180 		*global_cnt += 1;
181 }
182 
183 static enum iwl_mvm_traffic_load iwl_mvm_get_traffic_load(struct iwl_mvm *mvm)
184 {
185 	return mvm->tcm.result.global_load;
186 }
187 
188 static enum iwl_mvm_traffic_load
189 iwl_mvm_get_traffic_load_band(struct iwl_mvm *mvm, enum nl80211_band band)
190 {
191 	return mvm->tcm.result.band_load[band];
192 }
193 
194 struct iwl_is_dcm_with_go_iterator_data {
195 	struct ieee80211_vif *current_vif;
196 	bool is_dcm_with_p2p_go;
197 };
198 
199 static void iwl_mvm_is_dcm_with_go_iterator(void *_data, u8 *mac,
200 					    struct ieee80211_vif *vif)
201 {
202 	struct iwl_is_dcm_with_go_iterator_data *data = _data;
203 	struct iwl_mvm_vif *other_mvmvif = iwl_mvm_vif_from_mac80211(vif);
204 	struct iwl_mvm_vif *curr_mvmvif =
205 		iwl_mvm_vif_from_mac80211(data->current_vif);
206 
207 	/* exclude the given vif */
208 	if (vif == data->current_vif)
209 		return;
210 
211 	if (vif->type == NL80211_IFTYPE_AP && vif->p2p &&
212 	    other_mvmvif->phy_ctxt && curr_mvmvif->phy_ctxt &&
213 	    other_mvmvif->phy_ctxt->id != curr_mvmvif->phy_ctxt->id)
214 		data->is_dcm_with_p2p_go = true;
215 }
216 
217 static enum
218 iwl_mvm_scan_type _iwl_mvm_get_scan_type(struct iwl_mvm *mvm,
219 					 struct ieee80211_vif *vif,
220 					 enum iwl_mvm_traffic_load load,
221 					 bool low_latency)
222 {
223 	int global_cnt = 0;
224 
225 	ieee80211_iterate_active_interfaces_atomic(mvm->hw,
226 					    IEEE80211_IFACE_ITER_NORMAL,
227 					    iwl_mvm_scan_condition_iterator,
228 					    &global_cnt);
229 	if (!global_cnt)
230 		return IWL_SCAN_TYPE_UNASSOC;
231 
232 	if (fw_has_api(&mvm->fw->ucode_capa,
233 		       IWL_UCODE_TLV_API_FRAGMENTED_SCAN)) {
234 		if ((load == IWL_MVM_TRAFFIC_HIGH || low_latency) &&
235 		    (!vif || vif->type != NL80211_IFTYPE_P2P_DEVICE))
236 			return IWL_SCAN_TYPE_FRAGMENTED;
237 
238 		/* in case of DCM with GO where BSS DTIM interval < 220msec
239 		 * set all scan requests as fast-balance scan
240 		 * */
241 		if (vif && vif->type == NL80211_IFTYPE_STATION &&
242 		    vif->bss_conf.dtim_period < 220) {
243 			struct iwl_is_dcm_with_go_iterator_data data = {
244 				.current_vif = vif,
245 				.is_dcm_with_p2p_go = false,
246 			};
247 
248 			ieee80211_iterate_active_interfaces_atomic(mvm->hw,
249 						IEEE80211_IFACE_ITER_NORMAL,
250 						iwl_mvm_is_dcm_with_go_iterator,
251 						&data);
252 			if (data.is_dcm_with_p2p_go)
253 				return IWL_SCAN_TYPE_FAST_BALANCE;
254 		}
255 	}
256 
257 	if (load >= IWL_MVM_TRAFFIC_MEDIUM || low_latency)
258 		return IWL_SCAN_TYPE_MILD;
259 
260 	return IWL_SCAN_TYPE_WILD;
261 }
262 
263 static enum
264 iwl_mvm_scan_type iwl_mvm_get_scan_type(struct iwl_mvm *mvm,
265 					struct ieee80211_vif *vif)
266 {
267 	enum iwl_mvm_traffic_load load;
268 	bool low_latency;
269 
270 	load = iwl_mvm_get_traffic_load(mvm);
271 	low_latency = iwl_mvm_low_latency(mvm);
272 
273 	return _iwl_mvm_get_scan_type(mvm, vif, load, low_latency);
274 }
275 
276 static enum
277 iwl_mvm_scan_type iwl_mvm_get_scan_type_band(struct iwl_mvm *mvm,
278 					     struct ieee80211_vif *vif,
279 					     enum nl80211_band band)
280 {
281 	enum iwl_mvm_traffic_load load;
282 	bool low_latency;
283 
284 	load = iwl_mvm_get_traffic_load_band(mvm, band);
285 	low_latency = iwl_mvm_low_latency_band(mvm, band);
286 
287 	return _iwl_mvm_get_scan_type(mvm, vif, load, low_latency);
288 }
289 
290 static inline bool iwl_mvm_rrm_scan_needed(struct iwl_mvm *mvm)
291 {
292 	/* require rrm scan whenever the fw supports it */
293 	return fw_has_capa(&mvm->fw->ucode_capa,
294 			   IWL_UCODE_TLV_CAPA_DS_PARAM_SET_IE_SUPPORT);
295 }
296 
297 static int iwl_mvm_max_scan_ie_fw_cmd_room(struct iwl_mvm *mvm)
298 {
299 	int max_probe_len;
300 
301 	max_probe_len = SCAN_OFFLOAD_PROBE_REQ_SIZE;
302 
303 	/* we create the 802.11 header and SSID element */
304 	max_probe_len -= 24 + 2;
305 
306 	/* DS parameter set element is added on 2.4GHZ band if required */
307 	if (iwl_mvm_rrm_scan_needed(mvm))
308 		max_probe_len -= 3;
309 
310 	return max_probe_len;
311 }
312 
313 int iwl_mvm_max_scan_ie_len(struct iwl_mvm *mvm)
314 {
315 	int max_ie_len = iwl_mvm_max_scan_ie_fw_cmd_room(mvm);
316 
317 	/* TODO: [BUG] This function should return the maximum allowed size of
318 	 * scan IEs, however the LMAC scan api contains both 2GHZ and 5GHZ IEs
319 	 * in the same command. So the correct implementation of this function
320 	 * is just iwl_mvm_max_scan_ie_fw_cmd_room() / 2. Currently the scan
321 	 * command has only 512 bytes and it would leave us with about 240
322 	 * bytes for scan IEs, which is clearly not enough. So meanwhile
323 	 * we will report an incorrect value. This may result in a failure to
324 	 * issue a scan in unified_scan_lmac and unified_sched_scan_lmac
325 	 * functions with -ENOBUFS, if a large enough probe will be provided.
326 	 */
327 	return max_ie_len;
328 }
329 
330 void iwl_mvm_rx_lmac_scan_iter_complete_notif(struct iwl_mvm *mvm,
331 					      struct iwl_rx_cmd_buffer *rxb)
332 {
333 	struct iwl_rx_packet *pkt = rxb_addr(rxb);
334 	struct iwl_lmac_scan_complete_notif *notif = (void *)pkt->data;
335 
336 	IWL_DEBUG_SCAN(mvm,
337 		       "Scan offload iteration complete: status=0x%x scanned channels=%d\n",
338 		       notif->status, notif->scanned_channels);
339 
340 	if (mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_FOUND) {
341 		IWL_DEBUG_SCAN(mvm, "Pass all scheduled scan results found\n");
342 		ieee80211_sched_scan_results(mvm->hw);
343 		mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_ENABLED;
344 	}
345 }
346 
347 void iwl_mvm_rx_scan_match_found(struct iwl_mvm *mvm,
348 				 struct iwl_rx_cmd_buffer *rxb)
349 {
350 	IWL_DEBUG_SCAN(mvm, "Scheduled scan results\n");
351 	ieee80211_sched_scan_results(mvm->hw);
352 }
353 
354 static const char *iwl_mvm_ebs_status_str(enum iwl_scan_ebs_status status)
355 {
356 	switch (status) {
357 	case IWL_SCAN_EBS_SUCCESS:
358 		return "successful";
359 	case IWL_SCAN_EBS_INACTIVE:
360 		return "inactive";
361 	case IWL_SCAN_EBS_FAILED:
362 	case IWL_SCAN_EBS_CHAN_NOT_FOUND:
363 	default:
364 		return "failed";
365 	}
366 }
367 
368 void iwl_mvm_rx_lmac_scan_complete_notif(struct iwl_mvm *mvm,
369 					 struct iwl_rx_cmd_buffer *rxb)
370 {
371 	struct iwl_rx_packet *pkt = rxb_addr(rxb);
372 	struct iwl_periodic_scan_complete *scan_notif = (void *)pkt->data;
373 	bool aborted = (scan_notif->status == IWL_SCAN_OFFLOAD_ABORTED);
374 
375 	/* If this happens, the firmware has mistakenly sent an LMAC
376 	 * notification during UMAC scans -- warn and ignore it.
377 	 */
378 	if (WARN_ON_ONCE(fw_has_capa(&mvm->fw->ucode_capa,
379 				     IWL_UCODE_TLV_CAPA_UMAC_SCAN)))
380 		return;
381 
382 	/* scan status must be locked for proper checking */
383 	lockdep_assert_held(&mvm->mutex);
384 
385 	/* We first check if we were stopping a scan, in which case we
386 	 * just clear the stopping flag.  Then we check if it was a
387 	 * firmware initiated stop, in which case we need to inform
388 	 * mac80211.
389 	 * Note that we can have a stopping and a running scan
390 	 * simultaneously, but we can't have two different types of
391 	 * scans stopping or running at the same time (since LMAC
392 	 * doesn't support it).
393 	 */
394 
395 	if (mvm->scan_status & IWL_MVM_SCAN_STOPPING_SCHED) {
396 		WARN_ON_ONCE(mvm->scan_status & IWL_MVM_SCAN_STOPPING_REGULAR);
397 
398 		IWL_DEBUG_SCAN(mvm, "Scheduled scan %s, EBS status %s\n",
399 			       aborted ? "aborted" : "completed",
400 			       iwl_mvm_ebs_status_str(scan_notif->ebs_status));
401 		IWL_DEBUG_SCAN(mvm,
402 			       "Last line %d, Last iteration %d, Time after last iteration %d\n",
403 			       scan_notif->last_schedule_line,
404 			       scan_notif->last_schedule_iteration,
405 			       __le32_to_cpu(scan_notif->time_after_last_iter));
406 
407 		mvm->scan_status &= ~IWL_MVM_SCAN_STOPPING_SCHED;
408 	} else if (mvm->scan_status & IWL_MVM_SCAN_STOPPING_REGULAR) {
409 		IWL_DEBUG_SCAN(mvm, "Regular scan %s, EBS status %s\n",
410 			       aborted ? "aborted" : "completed",
411 			       iwl_mvm_ebs_status_str(scan_notif->ebs_status));
412 
413 		mvm->scan_status &= ~IWL_MVM_SCAN_STOPPING_REGULAR;
414 	} else if (mvm->scan_status & IWL_MVM_SCAN_SCHED) {
415 		WARN_ON_ONCE(mvm->scan_status & IWL_MVM_SCAN_REGULAR);
416 
417 		IWL_DEBUG_SCAN(mvm, "Scheduled scan %s, EBS status %s\n",
418 			       aborted ? "aborted" : "completed",
419 			       iwl_mvm_ebs_status_str(scan_notif->ebs_status));
420 		IWL_DEBUG_SCAN(mvm,
421 			       "Last line %d, Last iteration %d, Time after last iteration %d (FW)\n",
422 			       scan_notif->last_schedule_line,
423 			       scan_notif->last_schedule_iteration,
424 			       __le32_to_cpu(scan_notif->time_after_last_iter));
425 
426 		mvm->scan_status &= ~IWL_MVM_SCAN_SCHED;
427 		ieee80211_sched_scan_stopped(mvm->hw);
428 		mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED;
429 	} else if (mvm->scan_status & IWL_MVM_SCAN_REGULAR) {
430 		struct cfg80211_scan_info info = {
431 			.aborted = aborted,
432 		};
433 
434 		IWL_DEBUG_SCAN(mvm, "Regular scan %s, EBS status %s (FW)\n",
435 			       aborted ? "aborted" : "completed",
436 			       iwl_mvm_ebs_status_str(scan_notif->ebs_status));
437 
438 		mvm->scan_status &= ~IWL_MVM_SCAN_REGULAR;
439 		ieee80211_scan_completed(mvm->hw, &info);
440 		cancel_delayed_work(&mvm->scan_timeout_dwork);
441 		iwl_mvm_resume_tcm(mvm);
442 	} else {
443 		IWL_ERR(mvm,
444 			"got scan complete notification but no scan is running\n");
445 	}
446 
447 	mvm->last_ebs_successful =
448 			scan_notif->ebs_status == IWL_SCAN_EBS_SUCCESS ||
449 			scan_notif->ebs_status == IWL_SCAN_EBS_INACTIVE;
450 }
451 
452 static int iwl_ssid_exist(u8 *ssid, u8 ssid_len, struct iwl_ssid_ie *ssid_list)
453 {
454 	int i;
455 
456 	for (i = 0; i < PROBE_OPTION_MAX; i++) {
457 		if (!ssid_list[i].len)
458 			break;
459 		if (ssid_list[i].len == ssid_len &&
460 		    !memcmp(ssid_list->ssid, ssid, ssid_len))
461 			return i;
462 	}
463 	return -1;
464 }
465 
466 /* We insert the SSIDs in an inverted order, because the FW will
467  * invert it back.
468  */
469 static void iwl_scan_build_ssids(struct iwl_mvm_scan_params *params,
470 				 struct iwl_ssid_ie *ssids,
471 				 u32 *ssid_bitmap)
472 {
473 	int i, j;
474 	int index;
475 	u32 tmp_bitmap = 0;
476 
477 	/*
478 	 * copy SSIDs from match list.
479 	 * iwl_config_sched_scan_profiles() uses the order of these ssids to
480 	 * config match list.
481 	 */
482 	for (i = 0, j = params->n_match_sets - 1;
483 	     j >= 0 && i < PROBE_OPTION_MAX;
484 	     i++, j--) {
485 		/* skip empty SSID matchsets */
486 		if (!params->match_sets[j].ssid.ssid_len)
487 			continue;
488 		ssids[i].id = WLAN_EID_SSID;
489 		ssids[i].len = params->match_sets[j].ssid.ssid_len;
490 		memcpy(ssids[i].ssid, params->match_sets[j].ssid.ssid,
491 		       ssids[i].len);
492 	}
493 
494 	/* add SSIDs from scan SSID list */
495 	for (j = params->n_ssids - 1;
496 	     j >= 0 && i < PROBE_OPTION_MAX;
497 	     i++, j--) {
498 		index = iwl_ssid_exist(params->ssids[j].ssid,
499 				       params->ssids[j].ssid_len,
500 				       ssids);
501 		if (index < 0) {
502 			ssids[i].id = WLAN_EID_SSID;
503 			ssids[i].len = params->ssids[j].ssid_len;
504 			memcpy(ssids[i].ssid, params->ssids[j].ssid,
505 			       ssids[i].len);
506 			tmp_bitmap |= BIT(i);
507 		} else {
508 			tmp_bitmap |= BIT(index);
509 		}
510 	}
511 	if (ssid_bitmap)
512 		*ssid_bitmap = tmp_bitmap;
513 }
514 
515 static int
516 iwl_mvm_config_sched_scan_profiles(struct iwl_mvm *mvm,
517 				   struct cfg80211_sched_scan_request *req)
518 {
519 	struct iwl_scan_offload_profile *profile;
520 	struct iwl_scan_offload_profile_cfg_v1 *profile_cfg_v1;
521 	struct iwl_scan_offload_blocklist *blocklist;
522 	struct iwl_scan_offload_profile_cfg_data *data;
523 	int max_profiles = iwl_umac_scan_get_max_profiles(mvm->fw);
524 	int profile_cfg_size = sizeof(*data) +
525 		sizeof(*profile) * max_profiles;
526 	struct iwl_host_cmd cmd = {
527 		.id = SCAN_OFFLOAD_UPDATE_PROFILES_CMD,
528 		.len[1] = profile_cfg_size,
529 		.dataflags[0] = IWL_HCMD_DFL_NOCOPY,
530 		.dataflags[1] = IWL_HCMD_DFL_NOCOPY,
531 	};
532 	int blocklist_len;
533 	int i;
534 	int ret;
535 
536 	if (WARN_ON(req->n_match_sets > max_profiles))
537 		return -EIO;
538 
539 	if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_SHORT_BL)
540 		blocklist_len = IWL_SCAN_SHORT_BLACKLIST_LEN;
541 	else
542 		blocklist_len = IWL_SCAN_MAX_BLACKLIST_LEN;
543 
544 	blocklist = kcalloc(blocklist_len, sizeof(*blocklist), GFP_KERNEL);
545 	if (!blocklist)
546 		return -ENOMEM;
547 
548 	profile_cfg_v1 = kzalloc(profile_cfg_size, GFP_KERNEL);
549 	if (!profile_cfg_v1) {
550 		ret = -ENOMEM;
551 		goto free_blocklist;
552 	}
553 
554 	cmd.data[0] = blocklist;
555 	cmd.len[0] = sizeof(*blocklist) * blocklist_len;
556 	cmd.data[1] = profile_cfg_v1;
557 
558 	/* if max_profile is MAX_PROFILES_V2, we have the new API */
559 	if (max_profiles == IWL_SCAN_MAX_PROFILES_V2) {
560 		struct iwl_scan_offload_profile_cfg *profile_cfg =
561 			(struct iwl_scan_offload_profile_cfg *)profile_cfg_v1;
562 
563 		data = &profile_cfg->data;
564 	} else {
565 		data = &profile_cfg_v1->data;
566 	}
567 
568 	/* No blocklist configuration */
569 	data->num_profiles = req->n_match_sets;
570 	data->active_clients = SCAN_CLIENT_SCHED_SCAN;
571 	data->pass_match = SCAN_CLIENT_SCHED_SCAN;
572 	data->match_notify = SCAN_CLIENT_SCHED_SCAN;
573 
574 	if (!req->n_match_sets || !req->match_sets[0].ssid.ssid_len)
575 		data->any_beacon_notify = SCAN_CLIENT_SCHED_SCAN;
576 
577 	for (i = 0; i < req->n_match_sets; i++) {
578 		profile = &profile_cfg_v1->profiles[i];
579 		profile->ssid_index = i;
580 		/* Support any cipher and auth algorithm */
581 		profile->unicast_cipher = 0xff;
582 		profile->auth_alg = 0xff;
583 		profile->network_type = IWL_NETWORK_TYPE_ANY;
584 		profile->band_selection = IWL_SCAN_OFFLOAD_SELECT_ANY;
585 		profile->client_bitmap = SCAN_CLIENT_SCHED_SCAN;
586 	}
587 
588 	IWL_DEBUG_SCAN(mvm, "Sending scheduled scan profile config\n");
589 
590 	ret = iwl_mvm_send_cmd(mvm, &cmd);
591 	kfree(profile_cfg_v1);
592 free_blocklist:
593 	kfree(blocklist);
594 
595 	return ret;
596 }
597 
598 static bool iwl_mvm_scan_pass_all(struct iwl_mvm *mvm,
599 				  struct cfg80211_sched_scan_request *req)
600 {
601 	if (req->n_match_sets && req->match_sets[0].ssid.ssid_len) {
602 		IWL_DEBUG_SCAN(mvm,
603 			       "Sending scheduled scan with filtering, n_match_sets %d\n",
604 			       req->n_match_sets);
605 		mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED;
606 		return false;
607 	}
608 
609 	IWL_DEBUG_SCAN(mvm, "Sending Scheduled scan without filtering\n");
610 
611 	mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_ENABLED;
612 	return true;
613 }
614 
615 static int iwl_mvm_lmac_scan_abort(struct iwl_mvm *mvm)
616 {
617 	int ret;
618 	struct iwl_host_cmd cmd = {
619 		.id = SCAN_OFFLOAD_ABORT_CMD,
620 	};
621 	u32 status = CAN_ABORT_STATUS;
622 
623 	ret = iwl_mvm_send_cmd_status(mvm, &cmd, &status);
624 	if (ret)
625 		return ret;
626 
627 	if (status != CAN_ABORT_STATUS) {
628 		/*
629 		 * The scan abort will return 1 for success or
630 		 * 2 for "failure".  A failure condition can be
631 		 * due to simply not being in an active scan which
632 		 * can occur if we send the scan abort before the
633 		 * microcode has notified us that a scan is completed.
634 		 */
635 		IWL_DEBUG_SCAN(mvm, "SCAN OFFLOAD ABORT ret %d.\n", status);
636 		ret = -ENOENT;
637 	}
638 
639 	return ret;
640 }
641 
642 static void iwl_mvm_scan_fill_tx_cmd(struct iwl_mvm *mvm,
643 				     struct iwl_scan_req_tx_cmd *tx_cmd,
644 				     bool no_cck)
645 {
646 	tx_cmd[0].tx_flags = cpu_to_le32(TX_CMD_FLG_SEQ_CTL |
647 					 TX_CMD_FLG_BT_DIS);
648 	tx_cmd[0].rate_n_flags = iwl_mvm_scan_rate_n_flags(mvm,
649 							   NL80211_BAND_2GHZ,
650 							   no_cck);
651 
652 	if (iwl_fw_lookup_cmd_ver(mvm->fw, LONG_GROUP,
653 				  ADD_STA,
654 				  0) < 12) {
655 		tx_cmd[0].sta_id = mvm->aux_sta.sta_id;
656 		tx_cmd[1].sta_id = mvm->aux_sta.sta_id;
657 
658 	/*
659 	 * Fw doesn't use this sta anymore, pending deprecation via HOST API
660 	 * change
661 	 */
662 	} else {
663 		tx_cmd[0].sta_id = 0xff;
664 		tx_cmd[1].sta_id = 0xff;
665 	}
666 
667 	tx_cmd[1].tx_flags = cpu_to_le32(TX_CMD_FLG_SEQ_CTL |
668 					 TX_CMD_FLG_BT_DIS);
669 
670 	tx_cmd[1].rate_n_flags = iwl_mvm_scan_rate_n_flags(mvm,
671 							   NL80211_BAND_5GHZ,
672 							   no_cck);
673 }
674 
675 static void
676 iwl_mvm_lmac_scan_cfg_channels(struct iwl_mvm *mvm,
677 			       struct ieee80211_channel **channels,
678 			       int n_channels, u32 ssid_bitmap,
679 			       struct iwl_scan_req_lmac *cmd)
680 {
681 	struct iwl_scan_channel_cfg_lmac *channel_cfg = (void *)&cmd->data;
682 	int i;
683 
684 	for (i = 0; i < n_channels; i++) {
685 		channel_cfg[i].channel_num =
686 			cpu_to_le16(channels[i]->hw_value);
687 		channel_cfg[i].iter_count = cpu_to_le16(1);
688 		channel_cfg[i].iter_interval = 0;
689 		channel_cfg[i].flags =
690 			cpu_to_le32(IWL_UNIFIED_SCAN_CHANNEL_PARTIAL |
691 				    ssid_bitmap);
692 	}
693 }
694 
695 static u8 *iwl_mvm_copy_and_insert_ds_elem(struct iwl_mvm *mvm, const u8 *ies,
696 					   size_t len, u8 *const pos)
697 {
698 	static const u8 before_ds_params[] = {
699 			WLAN_EID_SSID,
700 			WLAN_EID_SUPP_RATES,
701 			WLAN_EID_REQUEST,
702 			WLAN_EID_EXT_SUPP_RATES,
703 	};
704 	size_t offs;
705 	u8 *newpos = pos;
706 
707 	if (!iwl_mvm_rrm_scan_needed(mvm)) {
708 		memcpy(newpos, ies, len);
709 		return newpos + len;
710 	}
711 
712 	offs = ieee80211_ie_split(ies, len,
713 				  before_ds_params,
714 				  ARRAY_SIZE(before_ds_params),
715 				  0);
716 
717 	memcpy(newpos, ies, offs);
718 	newpos += offs;
719 
720 	/* Add a placeholder for DS Parameter Set element */
721 	*newpos++ = WLAN_EID_DS_PARAMS;
722 	*newpos++ = 1;
723 	*newpos++ = 0;
724 
725 	memcpy(newpos, ies + offs, len - offs);
726 	newpos += len - offs;
727 
728 	return newpos;
729 }
730 
731 #define WFA_TPC_IE_LEN	9
732 
733 static void iwl_mvm_add_tpc_report_ie(u8 *pos)
734 {
735 	pos[0] = WLAN_EID_VENDOR_SPECIFIC;
736 	pos[1] = WFA_TPC_IE_LEN - 2;
737 	pos[2] = (WLAN_OUI_MICROSOFT >> 16) & 0xff;
738 	pos[3] = (WLAN_OUI_MICROSOFT >> 8) & 0xff;
739 	pos[4] = WLAN_OUI_MICROSOFT & 0xff;
740 	pos[5] = WLAN_OUI_TYPE_MICROSOFT_TPC;
741 	pos[6] = 0;
742 	/* pos[7] - tx power will be inserted by the FW */
743 	pos[7] = 0;
744 	pos[8] = 0;
745 }
746 
747 static void
748 iwl_mvm_build_scan_probe(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
749 			 struct ieee80211_scan_ies *ies,
750 			 struct iwl_mvm_scan_params *params)
751 {
752 	struct ieee80211_mgmt *frame = (void *)params->preq.buf;
753 	u8 *pos, *newpos;
754 	const u8 *mac_addr = params->flags & NL80211_SCAN_FLAG_RANDOM_ADDR ?
755 		params->mac_addr : NULL;
756 
757 	/*
758 	 * Unfortunately, right now the offload scan doesn't support randomising
759 	 * within the firmware, so until the firmware API is ready we implement
760 	 * it in the driver. This means that the scan iterations won't really be
761 	 * random, only when it's restarted, but at least that helps a bit.
762 	 */
763 	if (mac_addr)
764 		get_random_mask_addr(frame->sa, mac_addr,
765 				     params->mac_addr_mask);
766 	else
767 		memcpy(frame->sa, vif->addr, ETH_ALEN);
768 
769 	frame->frame_control = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ);
770 	eth_broadcast_addr(frame->da);
771 	eth_broadcast_addr(frame->bssid);
772 	frame->seq_ctrl = 0;
773 
774 	pos = frame->u.probe_req.variable;
775 	*pos++ = WLAN_EID_SSID;
776 	*pos++ = 0;
777 
778 	params->preq.mac_header.offset = 0;
779 	params->preq.mac_header.len = cpu_to_le16(24 + 2);
780 
781 	/* Insert ds parameter set element on 2.4 GHz band */
782 	newpos = iwl_mvm_copy_and_insert_ds_elem(mvm,
783 						 ies->ies[NL80211_BAND_2GHZ],
784 						 ies->len[NL80211_BAND_2GHZ],
785 						 pos);
786 	params->preq.band_data[0].offset = cpu_to_le16(pos - params->preq.buf);
787 	params->preq.band_data[0].len = cpu_to_le16(newpos - pos);
788 	pos = newpos;
789 
790 	memcpy(pos, ies->ies[NL80211_BAND_5GHZ],
791 	       ies->len[NL80211_BAND_5GHZ]);
792 	params->preq.band_data[1].offset = cpu_to_le16(pos - params->preq.buf);
793 	params->preq.band_data[1].len =
794 		cpu_to_le16(ies->len[NL80211_BAND_5GHZ]);
795 	pos += ies->len[NL80211_BAND_5GHZ];
796 
797 	memcpy(pos, ies->ies[NL80211_BAND_6GHZ],
798 	       ies->len[NL80211_BAND_6GHZ]);
799 	params->preq.band_data[2].offset = cpu_to_le16(pos - params->preq.buf);
800 	params->preq.band_data[2].len =
801 		cpu_to_le16(ies->len[NL80211_BAND_6GHZ]);
802 	pos += ies->len[NL80211_BAND_6GHZ];
803 	memcpy(pos, ies->common_ies, ies->common_ie_len);
804 	params->preq.common_data.offset = cpu_to_le16(pos - params->preq.buf);
805 
806 	if (iwl_mvm_rrm_scan_needed(mvm) &&
807 	    !fw_has_capa(&mvm->fw->ucode_capa,
808 			 IWL_UCODE_TLV_CAPA_WFA_TPC_REP_IE_SUPPORT)) {
809 		iwl_mvm_add_tpc_report_ie(pos + ies->common_ie_len);
810 		params->preq.common_data.len = cpu_to_le16(ies->common_ie_len +
811 							   WFA_TPC_IE_LEN);
812 	} else {
813 		params->preq.common_data.len = cpu_to_le16(ies->common_ie_len);
814 	}
815 }
816 
817 static void iwl_mvm_scan_lmac_dwell(struct iwl_mvm *mvm,
818 				    struct iwl_scan_req_lmac *cmd,
819 				    struct iwl_mvm_scan_params *params)
820 {
821 	cmd->active_dwell = IWL_SCAN_DWELL_ACTIVE;
822 	cmd->passive_dwell = IWL_SCAN_DWELL_PASSIVE;
823 	cmd->fragmented_dwell = IWL_SCAN_DWELL_FRAGMENTED;
824 	cmd->extended_dwell = IWL_SCAN_DWELL_EXTENDED;
825 	cmd->max_out_time = cpu_to_le32(scan_timing[params->type].max_out_time);
826 	cmd->suspend_time = cpu_to_le32(scan_timing[params->type].suspend_time);
827 	cmd->scan_prio = cpu_to_le32(IWL_SCAN_PRIORITY_EXT_6);
828 }
829 
830 static inline bool iwl_mvm_scan_fits(struct iwl_mvm *mvm, int n_ssids,
831 				     struct ieee80211_scan_ies *ies,
832 				     int n_channels)
833 {
834 	return ((n_ssids <= PROBE_OPTION_MAX) &&
835 		(n_channels <= mvm->fw->ucode_capa.n_scan_channels) &
836 		(ies->common_ie_len +
837 		 ies->len[NL80211_BAND_2GHZ] +
838 		 ies->len[NL80211_BAND_5GHZ] <=
839 		 iwl_mvm_max_scan_ie_fw_cmd_room(mvm)));
840 }
841 
842 static inline bool iwl_mvm_scan_use_ebs(struct iwl_mvm *mvm,
843 					struct ieee80211_vif *vif)
844 {
845 	const struct iwl_ucode_capabilities *capa = &mvm->fw->ucode_capa;
846 	bool low_latency;
847 
848 	if (iwl_mvm_is_cdb_supported(mvm))
849 		low_latency = iwl_mvm_low_latency_band(mvm, NL80211_BAND_5GHZ);
850 	else
851 		low_latency = iwl_mvm_low_latency(mvm);
852 
853 	/* We can only use EBS if:
854 	 *	1. the feature is supported;
855 	 *	2. the last EBS was successful;
856 	 *	3. if only single scan, the single scan EBS API is supported;
857 	 *	4. it's not a p2p find operation.
858 	 *	5. we are not in low latency mode,
859 	 *	   or if fragmented ebs is supported by the FW
860 	 */
861 	return ((capa->flags & IWL_UCODE_TLV_FLAGS_EBS_SUPPORT) &&
862 		mvm->last_ebs_successful && IWL_MVM_ENABLE_EBS &&
863 		vif->type != NL80211_IFTYPE_P2P_DEVICE &&
864 		(!low_latency || iwl_mvm_is_frag_ebs_supported(mvm)));
865 }
866 
867 static inline bool iwl_mvm_is_regular_scan(struct iwl_mvm_scan_params *params)
868 {
869 	return params->n_scan_plans == 1 &&
870 		params->scan_plans[0].iterations == 1;
871 }
872 
873 static bool iwl_mvm_is_scan_fragmented(enum iwl_mvm_scan_type type)
874 {
875 	return (type == IWL_SCAN_TYPE_FRAGMENTED ||
876 		type == IWL_SCAN_TYPE_FAST_BALANCE);
877 }
878 
879 static int iwl_mvm_scan_lmac_flags(struct iwl_mvm *mvm,
880 				   struct iwl_mvm_scan_params *params,
881 				   struct ieee80211_vif *vif)
882 {
883 	int flags = 0;
884 
885 	if (params->n_ssids == 0)
886 		flags |= IWL_MVM_LMAC_SCAN_FLAG_PASSIVE;
887 
888 	if (params->n_ssids == 1 && params->ssids[0].ssid_len != 0)
889 		flags |= IWL_MVM_LMAC_SCAN_FLAG_PRE_CONNECTION;
890 
891 	if (iwl_mvm_is_scan_fragmented(params->type))
892 		flags |= IWL_MVM_LMAC_SCAN_FLAG_FRAGMENTED;
893 
894 	if (iwl_mvm_rrm_scan_needed(mvm) &&
895 	    fw_has_capa(&mvm->fw->ucode_capa,
896 			IWL_UCODE_TLV_CAPA_WFA_TPC_REP_IE_SUPPORT))
897 		flags |= IWL_MVM_LMAC_SCAN_FLAGS_RRM_ENABLED;
898 
899 	if (params->pass_all)
900 		flags |= IWL_MVM_LMAC_SCAN_FLAG_PASS_ALL;
901 	else
902 		flags |= IWL_MVM_LMAC_SCAN_FLAG_MATCH;
903 
904 #ifdef CONFIG_IWLWIFI_DEBUGFS
905 	if (mvm->scan_iter_notif_enabled)
906 		flags |= IWL_MVM_LMAC_SCAN_FLAG_ITER_COMPLETE;
907 #endif
908 
909 	if (mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_ENABLED)
910 		flags |= IWL_MVM_LMAC_SCAN_FLAG_ITER_COMPLETE;
911 
912 	if (iwl_mvm_is_regular_scan(params) &&
913 	    vif->type != NL80211_IFTYPE_P2P_DEVICE &&
914 	    !iwl_mvm_is_scan_fragmented(params->type))
915 		flags |= IWL_MVM_LMAC_SCAN_FLAG_EXTENDED_DWELL;
916 
917 	return flags;
918 }
919 
920 static void
921 iwl_mvm_scan_set_legacy_probe_req(struct iwl_scan_probe_req_v1 *p_req,
922 				  struct iwl_scan_probe_req *src_p_req)
923 {
924 	int i;
925 
926 	p_req->mac_header = src_p_req->mac_header;
927 	for (i = 0; i < SCAN_NUM_BAND_PROBE_DATA_V_1; i++)
928 		p_req->band_data[i] = src_p_req->band_data[i];
929 	p_req->common_data = src_p_req->common_data;
930 	memcpy(p_req->buf, src_p_req->buf, sizeof(p_req->buf));
931 }
932 
933 static int iwl_mvm_scan_lmac(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
934 			     struct iwl_mvm_scan_params *params)
935 {
936 	struct iwl_scan_req_lmac *cmd = mvm->scan_cmd;
937 	struct iwl_scan_probe_req_v1 *preq =
938 		(void *)(cmd->data + sizeof(struct iwl_scan_channel_cfg_lmac) *
939 			 mvm->fw->ucode_capa.n_scan_channels);
940 	u32 ssid_bitmap = 0;
941 	int i;
942 	u8 band;
943 
944 	if (WARN_ON(params->n_scan_plans > IWL_MAX_SCHED_SCAN_PLANS))
945 		return -EINVAL;
946 
947 	iwl_mvm_scan_lmac_dwell(mvm, cmd, params);
948 
949 	cmd->rx_chain_select = iwl_mvm_scan_rx_chain(mvm);
950 	cmd->iter_num = cpu_to_le32(1);
951 	cmd->n_channels = (u8)params->n_channels;
952 
953 	cmd->delay = cpu_to_le32(params->delay);
954 
955 	cmd->scan_flags = cpu_to_le32(iwl_mvm_scan_lmac_flags(mvm, params,
956 							      vif));
957 
958 	band = iwl_mvm_phy_band_from_nl80211(params->channels[0]->band);
959 	cmd->flags = cpu_to_le32(band);
960 	cmd->filter_flags = cpu_to_le32(MAC_FILTER_ACCEPT_GRP |
961 					MAC_FILTER_IN_BEACON);
962 	iwl_mvm_scan_fill_tx_cmd(mvm, cmd->tx_cmd, params->no_cck);
963 	iwl_scan_build_ssids(params, cmd->direct_scan, &ssid_bitmap);
964 
965 	/* this API uses bits 1-20 instead of 0-19 */
966 	ssid_bitmap <<= 1;
967 
968 	for (i = 0; i < params->n_scan_plans; i++) {
969 		struct cfg80211_sched_scan_plan *scan_plan =
970 			&params->scan_plans[i];
971 
972 		cmd->schedule[i].delay =
973 			cpu_to_le16(scan_plan->interval);
974 		cmd->schedule[i].iterations = scan_plan->iterations;
975 		cmd->schedule[i].full_scan_mul = 1;
976 	}
977 
978 	/*
979 	 * If the number of iterations of the last scan plan is set to
980 	 * zero, it should run infinitely. However, this is not always the case.
981 	 * For example, when regular scan is requested the driver sets one scan
982 	 * plan with one iteration.
983 	 */
984 	if (!cmd->schedule[i - 1].iterations)
985 		cmd->schedule[i - 1].iterations = 0xff;
986 
987 	if (iwl_mvm_scan_use_ebs(mvm, vif)) {
988 		cmd->channel_opt[0].flags =
989 			cpu_to_le16(IWL_SCAN_CHANNEL_FLAG_EBS |
990 				    IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE |
991 				    IWL_SCAN_CHANNEL_FLAG_CACHE_ADD);
992 		cmd->channel_opt[0].non_ebs_ratio =
993 			cpu_to_le16(IWL_DENSE_EBS_SCAN_RATIO);
994 		cmd->channel_opt[1].flags =
995 			cpu_to_le16(IWL_SCAN_CHANNEL_FLAG_EBS |
996 				    IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE |
997 				    IWL_SCAN_CHANNEL_FLAG_CACHE_ADD);
998 		cmd->channel_opt[1].non_ebs_ratio =
999 			cpu_to_le16(IWL_SPARSE_EBS_SCAN_RATIO);
1000 	}
1001 
1002 	iwl_mvm_lmac_scan_cfg_channels(mvm, params->channels,
1003 				       params->n_channels, ssid_bitmap, cmd);
1004 
1005 	iwl_mvm_scan_set_legacy_probe_req(preq, &params->preq);
1006 
1007 	return 0;
1008 }
1009 
1010 static int rate_to_scan_rate_flag(unsigned int rate)
1011 {
1012 	static const int rate_to_scan_rate[IWL_RATE_COUNT] = {
1013 		[IWL_RATE_1M_INDEX]	= SCAN_CONFIG_RATE_1M,
1014 		[IWL_RATE_2M_INDEX]	= SCAN_CONFIG_RATE_2M,
1015 		[IWL_RATE_5M_INDEX]	= SCAN_CONFIG_RATE_5M,
1016 		[IWL_RATE_11M_INDEX]	= SCAN_CONFIG_RATE_11M,
1017 		[IWL_RATE_6M_INDEX]	= SCAN_CONFIG_RATE_6M,
1018 		[IWL_RATE_9M_INDEX]	= SCAN_CONFIG_RATE_9M,
1019 		[IWL_RATE_12M_INDEX]	= SCAN_CONFIG_RATE_12M,
1020 		[IWL_RATE_18M_INDEX]	= SCAN_CONFIG_RATE_18M,
1021 		[IWL_RATE_24M_INDEX]	= SCAN_CONFIG_RATE_24M,
1022 		[IWL_RATE_36M_INDEX]	= SCAN_CONFIG_RATE_36M,
1023 		[IWL_RATE_48M_INDEX]	= SCAN_CONFIG_RATE_48M,
1024 		[IWL_RATE_54M_INDEX]	= SCAN_CONFIG_RATE_54M,
1025 	};
1026 
1027 	return rate_to_scan_rate[rate];
1028 }
1029 
1030 static __le32 iwl_mvm_scan_config_rates(struct iwl_mvm *mvm)
1031 {
1032 	struct ieee80211_supported_band *band;
1033 	unsigned int rates = 0;
1034 	int i;
1035 
1036 	band = &mvm->nvm_data->bands[NL80211_BAND_2GHZ];
1037 	for (i = 0; i < band->n_bitrates; i++)
1038 		rates |= rate_to_scan_rate_flag(band->bitrates[i].hw_value);
1039 	band = &mvm->nvm_data->bands[NL80211_BAND_5GHZ];
1040 	for (i = 0; i < band->n_bitrates; i++)
1041 		rates |= rate_to_scan_rate_flag(band->bitrates[i].hw_value);
1042 
1043 	/* Set both basic rates and supported rates */
1044 	rates |= SCAN_CONFIG_SUPPORTED_RATE(rates);
1045 
1046 	return cpu_to_le32(rates);
1047 }
1048 
1049 static void iwl_mvm_fill_scan_dwell(struct iwl_mvm *mvm,
1050 				    struct iwl_scan_dwell *dwell)
1051 {
1052 	dwell->active = IWL_SCAN_DWELL_ACTIVE;
1053 	dwell->passive = IWL_SCAN_DWELL_PASSIVE;
1054 	dwell->fragmented = IWL_SCAN_DWELL_FRAGMENTED;
1055 	dwell->extended = IWL_SCAN_DWELL_EXTENDED;
1056 }
1057 
1058 static void iwl_mvm_fill_channels(struct iwl_mvm *mvm, u8 *channels,
1059 				  u32 max_channels)
1060 {
1061 	struct ieee80211_supported_band *band;
1062 	int i, j = 0;
1063 
1064 	band = &mvm->nvm_data->bands[NL80211_BAND_2GHZ];
1065 	for (i = 0; i < band->n_channels && j < max_channels; i++, j++)
1066 		channels[j] = band->channels[i].hw_value;
1067 	band = &mvm->nvm_data->bands[NL80211_BAND_5GHZ];
1068 	for (i = 0; i < band->n_channels && j < max_channels; i++, j++)
1069 		channels[j] = band->channels[i].hw_value;
1070 }
1071 
1072 static void iwl_mvm_fill_scan_config_v1(struct iwl_mvm *mvm, void *config,
1073 					u32 flags, u8 channel_flags,
1074 					u32 max_channels)
1075 {
1076 	enum iwl_mvm_scan_type type = iwl_mvm_get_scan_type(mvm, NULL);
1077 	struct iwl_scan_config_v1 *cfg = config;
1078 
1079 	cfg->flags = cpu_to_le32(flags);
1080 	cfg->tx_chains = cpu_to_le32(iwl_mvm_get_valid_tx_ant(mvm));
1081 	cfg->rx_chains = cpu_to_le32(iwl_mvm_scan_rx_ant(mvm));
1082 	cfg->legacy_rates = iwl_mvm_scan_config_rates(mvm);
1083 	cfg->out_of_channel_time = cpu_to_le32(scan_timing[type].max_out_time);
1084 	cfg->suspend_time = cpu_to_le32(scan_timing[type].suspend_time);
1085 
1086 	iwl_mvm_fill_scan_dwell(mvm, &cfg->dwell);
1087 
1088 	memcpy(&cfg->mac_addr, &mvm->addresses[0].addr, ETH_ALEN);
1089 
1090 	/* This function should not be called when using ADD_STA ver >=12 */
1091 	WARN_ON_ONCE(iwl_fw_lookup_cmd_ver(mvm->fw, LONG_GROUP,
1092 					   ADD_STA, 0) >= 12);
1093 
1094 	cfg->bcast_sta_id = mvm->aux_sta.sta_id;
1095 	cfg->channel_flags = channel_flags;
1096 
1097 	iwl_mvm_fill_channels(mvm, cfg->channel_array, max_channels);
1098 }
1099 
1100 static void iwl_mvm_fill_scan_config_v2(struct iwl_mvm *mvm, void *config,
1101 					u32 flags, u8 channel_flags,
1102 					u32 max_channels)
1103 {
1104 	struct iwl_scan_config_v2 *cfg = config;
1105 
1106 	cfg->flags = cpu_to_le32(flags);
1107 	cfg->tx_chains = cpu_to_le32(iwl_mvm_get_valid_tx_ant(mvm));
1108 	cfg->rx_chains = cpu_to_le32(iwl_mvm_scan_rx_ant(mvm));
1109 	cfg->legacy_rates = iwl_mvm_scan_config_rates(mvm);
1110 
1111 	if (iwl_mvm_is_cdb_supported(mvm)) {
1112 		enum iwl_mvm_scan_type lb_type, hb_type;
1113 
1114 		lb_type = iwl_mvm_get_scan_type_band(mvm, NULL,
1115 						     NL80211_BAND_2GHZ);
1116 		hb_type = iwl_mvm_get_scan_type_band(mvm, NULL,
1117 						     NL80211_BAND_5GHZ);
1118 
1119 		cfg->out_of_channel_time[SCAN_LB_LMAC_IDX] =
1120 			cpu_to_le32(scan_timing[lb_type].max_out_time);
1121 		cfg->suspend_time[SCAN_LB_LMAC_IDX] =
1122 			cpu_to_le32(scan_timing[lb_type].suspend_time);
1123 
1124 		cfg->out_of_channel_time[SCAN_HB_LMAC_IDX] =
1125 			cpu_to_le32(scan_timing[hb_type].max_out_time);
1126 		cfg->suspend_time[SCAN_HB_LMAC_IDX] =
1127 			cpu_to_le32(scan_timing[hb_type].suspend_time);
1128 	} else {
1129 		enum iwl_mvm_scan_type type =
1130 			iwl_mvm_get_scan_type(mvm, NULL);
1131 
1132 		cfg->out_of_channel_time[SCAN_LB_LMAC_IDX] =
1133 			cpu_to_le32(scan_timing[type].max_out_time);
1134 		cfg->suspend_time[SCAN_LB_LMAC_IDX] =
1135 			cpu_to_le32(scan_timing[type].suspend_time);
1136 	}
1137 
1138 	iwl_mvm_fill_scan_dwell(mvm, &cfg->dwell);
1139 
1140 	memcpy(&cfg->mac_addr, &mvm->addresses[0].addr, ETH_ALEN);
1141 
1142 	/* This function should not be called when using ADD_STA ver >=12 */
1143 	WARN_ON_ONCE(iwl_fw_lookup_cmd_ver(mvm->fw, LONG_GROUP,
1144 					   ADD_STA, 0) >= 12);
1145 
1146 	cfg->bcast_sta_id = mvm->aux_sta.sta_id;
1147 	cfg->channel_flags = channel_flags;
1148 
1149 	iwl_mvm_fill_channels(mvm, cfg->channel_array, max_channels);
1150 }
1151 
1152 static int iwl_mvm_legacy_config_scan(struct iwl_mvm *mvm)
1153 {
1154 	void *cfg;
1155 	int ret, cmd_size;
1156 	struct iwl_host_cmd cmd = {
1157 		.id = iwl_cmd_id(SCAN_CFG_CMD, IWL_ALWAYS_LONG_GROUP, 0),
1158 	};
1159 	enum iwl_mvm_scan_type type;
1160 	enum iwl_mvm_scan_type hb_type = IWL_SCAN_TYPE_NOT_SET;
1161 	int num_channels =
1162 		mvm->nvm_data->bands[NL80211_BAND_2GHZ].n_channels +
1163 		mvm->nvm_data->bands[NL80211_BAND_5GHZ].n_channels;
1164 	u32 flags;
1165 	u8 channel_flags;
1166 
1167 	if (WARN_ON(num_channels > mvm->fw->ucode_capa.n_scan_channels))
1168 		num_channels = mvm->fw->ucode_capa.n_scan_channels;
1169 
1170 	if (iwl_mvm_is_cdb_supported(mvm)) {
1171 		type = iwl_mvm_get_scan_type_band(mvm, NULL,
1172 						  NL80211_BAND_2GHZ);
1173 		hb_type = iwl_mvm_get_scan_type_band(mvm, NULL,
1174 						     NL80211_BAND_5GHZ);
1175 		if (type == mvm->scan_type && hb_type == mvm->hb_scan_type)
1176 			return 0;
1177 	} else {
1178 		type = iwl_mvm_get_scan_type(mvm, NULL);
1179 		if (type == mvm->scan_type)
1180 			return 0;
1181 	}
1182 
1183 	if (iwl_mvm_cdb_scan_api(mvm))
1184 		cmd_size = sizeof(struct iwl_scan_config_v2);
1185 	else
1186 		cmd_size = sizeof(struct iwl_scan_config_v1);
1187 	cmd_size += mvm->fw->ucode_capa.n_scan_channels;
1188 
1189 	cfg = kzalloc(cmd_size, GFP_KERNEL);
1190 	if (!cfg)
1191 		return -ENOMEM;
1192 
1193 	flags = SCAN_CONFIG_FLAG_ACTIVATE |
1194 		 SCAN_CONFIG_FLAG_ALLOW_CHUB_REQS |
1195 		 SCAN_CONFIG_FLAG_SET_TX_CHAINS |
1196 		 SCAN_CONFIG_FLAG_SET_RX_CHAINS |
1197 		 SCAN_CONFIG_FLAG_SET_AUX_STA_ID |
1198 		 SCAN_CONFIG_FLAG_SET_ALL_TIMES |
1199 		 SCAN_CONFIG_FLAG_SET_LEGACY_RATES |
1200 		 SCAN_CONFIG_FLAG_SET_MAC_ADDR |
1201 		 SCAN_CONFIG_FLAG_SET_CHANNEL_FLAGS |
1202 		 SCAN_CONFIG_N_CHANNELS(num_channels) |
1203 		 (iwl_mvm_is_scan_fragmented(type) ?
1204 		  SCAN_CONFIG_FLAG_SET_FRAGMENTED :
1205 		  SCAN_CONFIG_FLAG_CLEAR_FRAGMENTED);
1206 
1207 	channel_flags = IWL_CHANNEL_FLAG_EBS |
1208 			IWL_CHANNEL_FLAG_ACCURATE_EBS |
1209 			IWL_CHANNEL_FLAG_EBS_ADD |
1210 			IWL_CHANNEL_FLAG_PRE_SCAN_PASSIVE2ACTIVE;
1211 
1212 	/*
1213 	 * Check for fragmented scan on LMAC2 - high band.
1214 	 * LMAC1 - low band is checked above.
1215 	 */
1216 	if (iwl_mvm_cdb_scan_api(mvm)) {
1217 		if (iwl_mvm_is_cdb_supported(mvm))
1218 			flags |= (iwl_mvm_is_scan_fragmented(hb_type)) ?
1219 				 SCAN_CONFIG_FLAG_SET_LMAC2_FRAGMENTED :
1220 				 SCAN_CONFIG_FLAG_CLEAR_LMAC2_FRAGMENTED;
1221 		iwl_mvm_fill_scan_config_v2(mvm, cfg, flags, channel_flags,
1222 					    num_channels);
1223 	} else {
1224 		iwl_mvm_fill_scan_config_v1(mvm, cfg, flags, channel_flags,
1225 					    num_channels);
1226 	}
1227 
1228 	cmd.data[0] = cfg;
1229 	cmd.len[0] = cmd_size;
1230 	cmd.dataflags[0] = IWL_HCMD_DFL_NOCOPY;
1231 
1232 	IWL_DEBUG_SCAN(mvm, "Sending UMAC scan config\n");
1233 
1234 	ret = iwl_mvm_send_cmd(mvm, &cmd);
1235 	if (!ret) {
1236 		mvm->scan_type = type;
1237 		mvm->hb_scan_type = hb_type;
1238 	}
1239 
1240 	kfree(cfg);
1241 	return ret;
1242 }
1243 
1244 int iwl_mvm_config_scan(struct iwl_mvm *mvm)
1245 {
1246 	struct iwl_scan_config cfg;
1247 	struct iwl_host_cmd cmd = {
1248 		.id = iwl_cmd_id(SCAN_CFG_CMD, IWL_ALWAYS_LONG_GROUP, 0),
1249 		.len[0] = sizeof(cfg),
1250 		.data[0] = &cfg,
1251 		.dataflags[0] = IWL_HCMD_DFL_NOCOPY,
1252 	};
1253 
1254 	if (!iwl_mvm_is_reduced_config_scan_supported(mvm))
1255 		return iwl_mvm_legacy_config_scan(mvm);
1256 
1257 	memset(&cfg, 0, sizeof(cfg));
1258 
1259 	if (iwl_fw_lookup_cmd_ver(mvm->fw, LONG_GROUP,
1260 				  ADD_STA, 0) < 12) {
1261 		cfg.bcast_sta_id = mvm->aux_sta.sta_id;
1262 	} else if (iwl_fw_lookup_cmd_ver(mvm->fw, LONG_GROUP,
1263 					 SCAN_CFG_CMD, 0) < 5) {
1264 		/*
1265 		 * Fw doesn't use this sta anymore. Deprecated on SCAN_CFG_CMD
1266 		 * version 5.
1267 		 */
1268 		cfg.bcast_sta_id = 0xff;
1269 	}
1270 
1271 	cfg.tx_chains = cpu_to_le32(iwl_mvm_get_valid_tx_ant(mvm));
1272 	cfg.rx_chains = cpu_to_le32(iwl_mvm_scan_rx_ant(mvm));
1273 
1274 	IWL_DEBUG_SCAN(mvm, "Sending UMAC scan config\n");
1275 
1276 	return iwl_mvm_send_cmd(mvm, &cmd);
1277 }
1278 
1279 static int iwl_mvm_scan_uid_by_status(struct iwl_mvm *mvm, int status)
1280 {
1281 	int i;
1282 
1283 	for (i = 0; i < mvm->max_scans; i++)
1284 		if (mvm->scan_uid_status[i] == status)
1285 			return i;
1286 
1287 	return -ENOENT;
1288 }
1289 
1290 static void iwl_mvm_scan_umac_dwell(struct iwl_mvm *mvm,
1291 				    struct iwl_scan_req_umac *cmd,
1292 				    struct iwl_mvm_scan_params *params)
1293 {
1294 	struct iwl_mvm_scan_timing_params *timing, *hb_timing;
1295 	u8 active_dwell, passive_dwell;
1296 
1297 	timing = &scan_timing[params->type];
1298 	active_dwell = IWL_SCAN_DWELL_ACTIVE;
1299 	passive_dwell = IWL_SCAN_DWELL_PASSIVE;
1300 
1301 	if (iwl_mvm_is_adaptive_dwell_supported(mvm)) {
1302 		cmd->v7.adwell_default_n_aps_social =
1303 			IWL_SCAN_ADWELL_DEFAULT_N_APS_SOCIAL;
1304 		cmd->v7.adwell_default_n_aps =
1305 			IWL_SCAN_ADWELL_DEFAULT_LB_N_APS;
1306 
1307 		if (iwl_mvm_is_adwell_hb_ap_num_supported(mvm))
1308 			cmd->v9.adwell_default_hb_n_aps =
1309 				IWL_SCAN_ADWELL_DEFAULT_HB_N_APS;
1310 
1311 		/* if custom max budget was configured with debugfs */
1312 		if (IWL_MVM_ADWELL_MAX_BUDGET)
1313 			cmd->v7.adwell_max_budget =
1314 				cpu_to_le16(IWL_MVM_ADWELL_MAX_BUDGET);
1315 		else if (params->ssids && params->ssids[0].ssid_len)
1316 			cmd->v7.adwell_max_budget =
1317 				cpu_to_le16(IWL_SCAN_ADWELL_MAX_BUDGET_DIRECTED_SCAN);
1318 		else
1319 			cmd->v7.adwell_max_budget =
1320 				cpu_to_le16(IWL_SCAN_ADWELL_MAX_BUDGET_FULL_SCAN);
1321 
1322 		cmd->v7.scan_priority = cpu_to_le32(IWL_SCAN_PRIORITY_EXT_6);
1323 		cmd->v7.max_out_time[SCAN_LB_LMAC_IDX] =
1324 			cpu_to_le32(timing->max_out_time);
1325 		cmd->v7.suspend_time[SCAN_LB_LMAC_IDX] =
1326 			cpu_to_le32(timing->suspend_time);
1327 
1328 		if (iwl_mvm_is_cdb_supported(mvm)) {
1329 			hb_timing = &scan_timing[params->hb_type];
1330 
1331 			cmd->v7.max_out_time[SCAN_HB_LMAC_IDX] =
1332 				cpu_to_le32(hb_timing->max_out_time);
1333 			cmd->v7.suspend_time[SCAN_HB_LMAC_IDX] =
1334 				cpu_to_le32(hb_timing->suspend_time);
1335 		}
1336 
1337 		if (!iwl_mvm_is_adaptive_dwell_v2_supported(mvm)) {
1338 			cmd->v7.active_dwell = active_dwell;
1339 			cmd->v7.passive_dwell = passive_dwell;
1340 			cmd->v7.fragmented_dwell = IWL_SCAN_DWELL_FRAGMENTED;
1341 		} else {
1342 			cmd->v8.active_dwell[SCAN_LB_LMAC_IDX] = active_dwell;
1343 			cmd->v8.passive_dwell[SCAN_LB_LMAC_IDX] = passive_dwell;
1344 			if (iwl_mvm_is_cdb_supported(mvm)) {
1345 				cmd->v8.active_dwell[SCAN_HB_LMAC_IDX] =
1346 					active_dwell;
1347 				cmd->v8.passive_dwell[SCAN_HB_LMAC_IDX] =
1348 					passive_dwell;
1349 			}
1350 		}
1351 	} else {
1352 		cmd->v1.extended_dwell = IWL_SCAN_DWELL_EXTENDED;
1353 		cmd->v1.active_dwell = active_dwell;
1354 		cmd->v1.passive_dwell = passive_dwell;
1355 		cmd->v1.fragmented_dwell = IWL_SCAN_DWELL_FRAGMENTED;
1356 
1357 		if (iwl_mvm_is_cdb_supported(mvm)) {
1358 			hb_timing = &scan_timing[params->hb_type];
1359 
1360 			cmd->v6.max_out_time[SCAN_HB_LMAC_IDX] =
1361 					cpu_to_le32(hb_timing->max_out_time);
1362 			cmd->v6.suspend_time[SCAN_HB_LMAC_IDX] =
1363 					cpu_to_le32(hb_timing->suspend_time);
1364 		}
1365 
1366 		if (iwl_mvm_cdb_scan_api(mvm)) {
1367 			cmd->v6.scan_priority =
1368 				cpu_to_le32(IWL_SCAN_PRIORITY_EXT_6);
1369 			cmd->v6.max_out_time[SCAN_LB_LMAC_IDX] =
1370 				cpu_to_le32(timing->max_out_time);
1371 			cmd->v6.suspend_time[SCAN_LB_LMAC_IDX] =
1372 				cpu_to_le32(timing->suspend_time);
1373 		} else {
1374 			cmd->v1.scan_priority =
1375 				cpu_to_le32(IWL_SCAN_PRIORITY_EXT_6);
1376 			cmd->v1.max_out_time =
1377 				cpu_to_le32(timing->max_out_time);
1378 			cmd->v1.suspend_time =
1379 				cpu_to_le32(timing->suspend_time);
1380 		}
1381 	}
1382 
1383 	if (iwl_mvm_is_regular_scan(params))
1384 		cmd->ooc_priority = cpu_to_le32(IWL_SCAN_PRIORITY_EXT_6);
1385 	else
1386 		cmd->ooc_priority = cpu_to_le32(IWL_SCAN_PRIORITY_EXT_2);
1387 }
1388 
1389 static u32 iwl_mvm_scan_umac_ooc_priority(struct iwl_mvm_scan_params *params)
1390 {
1391 	return iwl_mvm_is_regular_scan(params) ?
1392 		IWL_SCAN_PRIORITY_EXT_6 :
1393 		IWL_SCAN_PRIORITY_EXT_2;
1394 }
1395 
1396 static void
1397 iwl_mvm_scan_umac_dwell_v10(struct iwl_mvm *mvm,
1398 			    struct iwl_scan_general_params_v10 *general_params,
1399 			    struct iwl_mvm_scan_params *params)
1400 {
1401 	struct iwl_mvm_scan_timing_params *timing, *hb_timing;
1402 	u8 active_dwell, passive_dwell;
1403 
1404 	timing = &scan_timing[params->type];
1405 	active_dwell = IWL_SCAN_DWELL_ACTIVE;
1406 	passive_dwell = IWL_SCAN_DWELL_PASSIVE;
1407 
1408 	general_params->adwell_default_social_chn =
1409 		IWL_SCAN_ADWELL_DEFAULT_N_APS_SOCIAL;
1410 	general_params->adwell_default_2g = IWL_SCAN_ADWELL_DEFAULT_LB_N_APS;
1411 	general_params->adwell_default_5g = IWL_SCAN_ADWELL_DEFAULT_HB_N_APS;
1412 
1413 	/* if custom max budget was configured with debugfs */
1414 	if (IWL_MVM_ADWELL_MAX_BUDGET)
1415 		general_params->adwell_max_budget =
1416 			cpu_to_le16(IWL_MVM_ADWELL_MAX_BUDGET);
1417 	else if (params->ssids && params->ssids[0].ssid_len)
1418 		general_params->adwell_max_budget =
1419 			cpu_to_le16(IWL_SCAN_ADWELL_MAX_BUDGET_DIRECTED_SCAN);
1420 	else
1421 		general_params->adwell_max_budget =
1422 			cpu_to_le16(IWL_SCAN_ADWELL_MAX_BUDGET_FULL_SCAN);
1423 
1424 	general_params->scan_priority = cpu_to_le32(IWL_SCAN_PRIORITY_EXT_6);
1425 	general_params->max_out_of_time[SCAN_LB_LMAC_IDX] =
1426 		cpu_to_le32(timing->max_out_time);
1427 	general_params->suspend_time[SCAN_LB_LMAC_IDX] =
1428 		cpu_to_le32(timing->suspend_time);
1429 
1430 	hb_timing = &scan_timing[params->hb_type];
1431 
1432 	general_params->max_out_of_time[SCAN_HB_LMAC_IDX] =
1433 		cpu_to_le32(hb_timing->max_out_time);
1434 	general_params->suspend_time[SCAN_HB_LMAC_IDX] =
1435 		cpu_to_le32(hb_timing->suspend_time);
1436 
1437 	general_params->active_dwell[SCAN_LB_LMAC_IDX] = active_dwell;
1438 	general_params->passive_dwell[SCAN_LB_LMAC_IDX] = passive_dwell;
1439 	general_params->active_dwell[SCAN_HB_LMAC_IDX] = active_dwell;
1440 	general_params->passive_dwell[SCAN_HB_LMAC_IDX] = passive_dwell;
1441 }
1442 
1443 struct iwl_mvm_scan_channel_segment {
1444 	u8 start_idx;
1445 	u8 end_idx;
1446 	u8 first_channel_id;
1447 	u8 last_channel_id;
1448 	u8 channel_spacing_shift;
1449 	u8 band;
1450 };
1451 
1452 static const struct iwl_mvm_scan_channel_segment scan_channel_segments[] = {
1453 	{
1454 		.start_idx = 0,
1455 		.end_idx = 13,
1456 		.first_channel_id = 1,
1457 		.last_channel_id = 14,
1458 		.channel_spacing_shift = 0,
1459 		.band = PHY_BAND_24
1460 	},
1461 	{
1462 		.start_idx = 14,
1463 		.end_idx = 41,
1464 		.first_channel_id = 36,
1465 		.last_channel_id = 144,
1466 		.channel_spacing_shift = 2,
1467 		.band = PHY_BAND_5
1468 	},
1469 	{
1470 		.start_idx = 42,
1471 		.end_idx = 50,
1472 		.first_channel_id = 149,
1473 		.last_channel_id = 181,
1474 		.channel_spacing_shift = 2,
1475 		.band = PHY_BAND_5
1476 	},
1477 	{
1478 		.start_idx = 51,
1479 		.end_idx = 111,
1480 		.first_channel_id = 1,
1481 		.last_channel_id = 241,
1482 		.channel_spacing_shift = 2,
1483 		.band = PHY_BAND_6
1484 	},
1485 };
1486 
1487 static int iwl_mvm_scan_ch_and_band_to_idx(u8 channel_id, u8 band)
1488 {
1489 	int i, index;
1490 
1491 	if (!channel_id)
1492 		return -EINVAL;
1493 
1494 	for (i = 0; i < ARRAY_SIZE(scan_channel_segments); i++) {
1495 		const struct iwl_mvm_scan_channel_segment *ch_segment =
1496 			&scan_channel_segments[i];
1497 		u32 ch_offset;
1498 
1499 		if (ch_segment->band != band ||
1500 		    ch_segment->first_channel_id > channel_id ||
1501 		    ch_segment->last_channel_id < channel_id)
1502 			continue;
1503 
1504 		ch_offset = (channel_id - ch_segment->first_channel_id) >>
1505 			ch_segment->channel_spacing_shift;
1506 
1507 		index = scan_channel_segments[i].start_idx + ch_offset;
1508 		if (index < IWL_SCAN_NUM_CHANNELS)
1509 			return index;
1510 
1511 		break;
1512 	}
1513 
1514 	return -EINVAL;
1515 }
1516 
1517 static const u8 p2p_go_friendly_chs[] = {
1518 	36, 40, 44, 48, 149, 153, 157, 161, 165,
1519 };
1520 
1521 static const u8 social_chs[] = {
1522 	1, 6, 11
1523 };
1524 
1525 static void iwl_mvm_scan_ch_add_n_aps_override(enum nl80211_iftype vif_type,
1526 					       u8 ch_id, u8 band, u8 *ch_bitmap,
1527 					       size_t bitmap_n_entries)
1528 {
1529 	int i;
1530 
1531 	if (vif_type != NL80211_IFTYPE_P2P_DEVICE)
1532 		return;
1533 
1534 	for (i = 0; i < ARRAY_SIZE(p2p_go_friendly_chs); i++) {
1535 		if (p2p_go_friendly_chs[i] == ch_id) {
1536 			int ch_idx, bitmap_idx;
1537 
1538 			ch_idx = iwl_mvm_scan_ch_and_band_to_idx(ch_id, band);
1539 			if (ch_idx < 0)
1540 				return;
1541 
1542 			bitmap_idx = ch_idx / 8;
1543 			if (bitmap_idx >= bitmap_n_entries)
1544 				return;
1545 
1546 			ch_idx = ch_idx % 8;
1547 			ch_bitmap[bitmap_idx] |= BIT(ch_idx);
1548 
1549 			return;
1550 		}
1551 	}
1552 }
1553 
1554 static u32 iwl_mvm_scan_ch_n_aps_flag(enum nl80211_iftype vif_type, u8 ch_id)
1555 {
1556 	int i;
1557 	u32 flags = 0;
1558 
1559 	if (vif_type != NL80211_IFTYPE_P2P_DEVICE)
1560 		goto out;
1561 
1562 	for (i = 0; i < ARRAY_SIZE(p2p_go_friendly_chs); i++) {
1563 		if (p2p_go_friendly_chs[i] == ch_id) {
1564 			flags |= IWL_SCAN_ADWELL_N_APS_GO_FRIENDLY_BIT;
1565 			break;
1566 		}
1567 	}
1568 
1569 	if (flags)
1570 		goto out;
1571 
1572 	for (i = 0; i < ARRAY_SIZE(social_chs); i++) {
1573 		if (social_chs[i] == ch_id) {
1574 			flags |= IWL_SCAN_ADWELL_N_APS_SOCIAL_CHS_BIT;
1575 			break;
1576 		}
1577 	}
1578 
1579 out:
1580 	return flags;
1581 }
1582 
1583 static void
1584 iwl_mvm_umac_scan_cfg_channels(struct iwl_mvm *mvm,
1585 			       struct ieee80211_channel **channels,
1586 			       int n_channels, u32 flags,
1587 			       struct iwl_scan_channel_cfg_umac *channel_cfg)
1588 {
1589 	int i;
1590 
1591 	for (i = 0; i < n_channels; i++) {
1592 		channel_cfg[i].flags = cpu_to_le32(flags);
1593 		channel_cfg[i].v1.channel_num = channels[i]->hw_value;
1594 		if (iwl_mvm_is_scan_ext_chan_supported(mvm)) {
1595 			enum nl80211_band band = channels[i]->band;
1596 
1597 			channel_cfg[i].v2.band =
1598 				iwl_mvm_phy_band_from_nl80211(band);
1599 			channel_cfg[i].v2.iter_count = 1;
1600 			channel_cfg[i].v2.iter_interval = 0;
1601 		} else {
1602 			channel_cfg[i].v1.iter_count = 1;
1603 			channel_cfg[i].v1.iter_interval = 0;
1604 		}
1605 	}
1606 }
1607 
1608 static void
1609 iwl_mvm_umac_scan_cfg_channels_v4(struct iwl_mvm *mvm,
1610 				  struct ieee80211_channel **channels,
1611 				  struct iwl_scan_channel_params_v4 *cp,
1612 				  int n_channels, u32 flags,
1613 				  enum nl80211_iftype vif_type)
1614 {
1615 	u8 *bitmap = cp->adwell_ch_override_bitmap;
1616 	size_t bitmap_n_entries = ARRAY_SIZE(cp->adwell_ch_override_bitmap);
1617 	int i;
1618 
1619 	for (i = 0; i < n_channels; i++) {
1620 		enum nl80211_band band = channels[i]->band;
1621 		struct iwl_scan_channel_cfg_umac *cfg =
1622 			&cp->channel_config[i];
1623 
1624 		cfg->flags = cpu_to_le32(flags);
1625 		cfg->v2.channel_num = channels[i]->hw_value;
1626 		cfg->v2.band = iwl_mvm_phy_band_from_nl80211(band);
1627 		cfg->v2.iter_count = 1;
1628 		cfg->v2.iter_interval = 0;
1629 
1630 		iwl_mvm_scan_ch_add_n_aps_override(vif_type,
1631 						   cfg->v2.channel_num,
1632 						   cfg->v2.band, bitmap,
1633 						   bitmap_n_entries);
1634 	}
1635 }
1636 
1637 static void
1638 iwl_mvm_umac_scan_cfg_channels_v6(struct iwl_mvm *mvm,
1639 				  struct ieee80211_channel **channels,
1640 				  struct iwl_scan_channel_params_v6 *cp,
1641 				  int n_channels, u32 flags,
1642 				  enum nl80211_iftype vif_type)
1643 {
1644 	int i;
1645 
1646 	for (i = 0; i < n_channels; i++) {
1647 		enum nl80211_band band = channels[i]->band;
1648 		struct iwl_scan_channel_cfg_umac *cfg = &cp->channel_config[i];
1649 		u32 n_aps_flag =
1650 			iwl_mvm_scan_ch_n_aps_flag(vif_type,
1651 						   cfg->v2.channel_num);
1652 
1653 		cfg->flags = cpu_to_le32(flags | n_aps_flag);
1654 		cfg->v2.channel_num = channels[i]->hw_value;
1655 		cfg->v2.band = iwl_mvm_phy_band_from_nl80211(band);
1656 		if (cfg80211_channel_is_psc(channels[i]))
1657 			cfg->flags = 0;
1658 		cfg->v2.iter_count = 1;
1659 		cfg->v2.iter_interval = 0;
1660 	}
1661 }
1662 
1663 static int
1664 iwl_mvm_umac_scan_fill_6g_chan_list(struct iwl_mvm_scan_params *params,
1665 				    __le32 *cmd_short_ssid, u8 *cmd_bssid,
1666 				    u8 *scan_ssid_num, u8 *bssid_num)
1667 {
1668 	int j, idex_s = 0, idex_b = 0;
1669 	struct cfg80211_scan_6ghz_params *scan_6ghz_params =
1670 		params->scan_6ghz_params;
1671 
1672 	if (!params->n_6ghz_params) {
1673 		for (j = 0; j < params->n_ssids; j++) {
1674 			cmd_short_ssid[idex_s++] =
1675 				cpu_to_le32(~crc32_le(~0, params->ssids[j].ssid,
1676 						      params->ssids[j].ssid_len));
1677 			(*scan_ssid_num)++;
1678 		}
1679 		return 0;
1680 	}
1681 
1682 	/*
1683 	 * Populate the arrays of the short SSIDs and the BSSIDs using the 6GHz
1684 	 * collocated parameters. This might not be optimal, as this processing
1685 	 * does not (yet) correspond to the actual channels, so it is possible
1686 	 * that some entries would be left out.
1687 	 *
1688 	 * TODO: improve this logic.
1689 	 */
1690 	for (j = 0; j < params->n_6ghz_params; j++) {
1691 		int k;
1692 
1693 		/* First, try to place the short SSID */
1694 		if (scan_6ghz_params[j].short_ssid_valid) {
1695 			for (k = 0; k < idex_s; k++) {
1696 				if (cmd_short_ssid[k] ==
1697 				    cpu_to_le32(scan_6ghz_params[j].short_ssid))
1698 					break;
1699 			}
1700 
1701 			if (k == idex_s && idex_s < SCAN_SHORT_SSID_MAX_SIZE) {
1702 				cmd_short_ssid[idex_s++] =
1703 					cpu_to_le32(scan_6ghz_params[j].short_ssid);
1704 				(*scan_ssid_num)++;
1705 			}
1706 		}
1707 
1708 		/* try to place BSSID for the same entry */
1709 		for (k = 0; k < idex_b; k++) {
1710 			if (!memcmp(&cmd_bssid[ETH_ALEN * k],
1711 				    scan_6ghz_params[j].bssid, ETH_ALEN))
1712 				break;
1713 		}
1714 
1715 		if (k == idex_b && idex_b < SCAN_BSSID_MAX_SIZE) {
1716 			memcpy(&cmd_bssid[ETH_ALEN * idex_b++],
1717 			       scan_6ghz_params[j].bssid, ETH_ALEN);
1718 			(*bssid_num)++;
1719 		}
1720 	}
1721 	return 0;
1722 }
1723 
1724 /* TODO: this function can be merged with iwl_mvm_scan_umac_fill_ch_p_v6 */
1725 static void
1726 iwl_mvm_umac_scan_cfg_channels_v6_6g(struct iwl_mvm_scan_params *params,
1727 				     u32 n_channels, __le32 *cmd_short_ssid,
1728 				     u8 *cmd_bssid, u8 scan_ssid_num,
1729 				     u8 bssid_num,
1730 				     struct iwl_scan_channel_params_v6 *cp,
1731 				     enum nl80211_iftype vif_type)
1732 {
1733 	struct iwl_scan_channel_cfg_umac *channel_cfg = cp->channel_config;
1734 	int i;
1735 	struct cfg80211_scan_6ghz_params *scan_6ghz_params =
1736 		params->scan_6ghz_params;
1737 
1738 	for (i = 0; i < params->n_channels; i++) {
1739 		struct iwl_scan_channel_cfg_umac *cfg =
1740 			&cp->channel_config[i];
1741 
1742 		u32 s_ssid_bitmap = 0, bssid_bitmap = 0, flags = 0;
1743 		u8 j, k, s_max = 0, b_max = 0, n_used_bssid_entries;
1744 		bool force_passive, found = false,
1745 		     unsolicited_probe_on_chan = false, psc_no_listen = false;
1746 
1747 		cfg->v1.channel_num = params->channels[i]->hw_value;
1748 		cfg->v2.band = 2;
1749 		cfg->v2.iter_count = 1;
1750 		cfg->v2.iter_interval = 0;
1751 
1752 		/*
1753 		 * The optimize the scan time, i.e., reduce the scan dwell time
1754 		 * on each channel, the below logic tries to set 3 direct BSSID
1755 		 * probe requests for each broadcast probe request with a short
1756 		 * SSID.
1757 		 * TODO: improve this logic
1758 		 */
1759 		n_used_bssid_entries = 3;
1760 		for (j = 0; j < params->n_6ghz_params; j++) {
1761 			if (!(scan_6ghz_params[j].channel_idx == i))
1762 				continue;
1763 
1764 			found = false;
1765 			unsolicited_probe_on_chan |=
1766 				scan_6ghz_params[j].unsolicited_probe;
1767 			psc_no_listen |= scan_6ghz_params[j].psc_no_listen;
1768 
1769 			for (k = 0; k < scan_ssid_num; k++) {
1770 				if (!scan_6ghz_params[j].unsolicited_probe &&
1771 				    le32_to_cpu(cmd_short_ssid[k]) ==
1772 				    scan_6ghz_params[j].short_ssid) {
1773 					/* Relevant short SSID bit set */
1774 					if (s_ssid_bitmap & BIT(k)) {
1775 						found = true;
1776 						break;
1777 					}
1778 
1779 					/*
1780 					 * Use short SSID only to create a new
1781 					 * iteration during channel dwell.
1782 					 */
1783 					if (n_used_bssid_entries >= 3) {
1784 						s_ssid_bitmap |= BIT(k);
1785 						s_max++;
1786 						n_used_bssid_entries -= 3;
1787 						found = true;
1788 						break;
1789 					}
1790 				}
1791 			}
1792 
1793 			if (found)
1794 				continue;
1795 
1796 			for (k = 0; k < bssid_num; k++) {
1797 				if (!memcmp(&cmd_bssid[ETH_ALEN * k],
1798 					    scan_6ghz_params[j].bssid,
1799 					    ETH_ALEN)) {
1800 					if (!(bssid_bitmap & BIT(k))) {
1801 						bssid_bitmap |= BIT(k);
1802 						b_max++;
1803 						n_used_bssid_entries++;
1804 					}
1805 					break;
1806 				}
1807 			}
1808 		}
1809 
1810 		flags = bssid_bitmap | (s_ssid_bitmap << 16);
1811 
1812 		if (cfg80211_channel_is_psc(params->channels[i]) &&
1813 		    psc_no_listen)
1814 			flags |= IWL_UHB_CHAN_CFG_FLAG_PSC_CHAN_NO_LISTEN;
1815 
1816 		if (unsolicited_probe_on_chan)
1817 			flags |= IWL_UHB_CHAN_CFG_FLAG_UNSOLICITED_PROBE_RES;
1818 
1819 		/*
1820 		 * In the following cases apply passive scan:
1821 		 * 1. Non fragmented scan:
1822 		 *	- PSC channel with NO_LISTEN_FLAG on should be treated
1823 		 *	  like non PSC channel
1824 		 *	- Non PSC channel with more than 3 short SSIDs or more
1825 		 *	  than 9 BSSIDs.
1826 		 *	- Non PSC Channel with unsolicited probe response and
1827 		 *	  more than 2 short SSIDs or more than 6 BSSIDs.
1828 		 *	- PSC channel with more than 2 short SSIDs or more than
1829 		 *	  6 BSSIDs.
1830 		 * 3. Fragmented scan:
1831 		 *	- PSC channel with more than 1 SSID or 3 BSSIDs.
1832 		 *	- Non PSC channel with more than 2 SSIDs or 6 BSSIDs.
1833 		 *	- Non PSC channel with unsolicited probe response and
1834 		 *	  more than 1 SSID or more than 3 BSSIDs.
1835 		 */
1836 		if (!iwl_mvm_is_scan_fragmented(params->type)) {
1837 			if (!cfg80211_channel_is_psc(params->channels[i]) ||
1838 			    flags & IWL_UHB_CHAN_CFG_FLAG_PSC_CHAN_NO_LISTEN) {
1839 				force_passive = (s_max > 3 || b_max > 9);
1840 				force_passive |= (unsolicited_probe_on_chan &&
1841 						  (s_max > 2 || b_max > 6));
1842 			} else {
1843 				force_passive = (s_max > 2 || b_max > 6);
1844 			}
1845 		} else if (cfg80211_channel_is_psc(params->channels[i])) {
1846 			force_passive = (s_max > 1 || b_max > 3);
1847 		} else {
1848 			force_passive = (s_max > 2 || b_max > 6);
1849 			force_passive |= (unsolicited_probe_on_chan &&
1850 					  (s_max > 1 || b_max > 3));
1851 		}
1852 		if (force_passive ||
1853 		    (!flags && !cfg80211_channel_is_psc(params->channels[i])))
1854 			flags |= IWL_UHB_CHAN_CFG_FLAG_FORCE_PASSIVE;
1855 
1856 		channel_cfg[i].flags |= cpu_to_le32(flags);
1857 	}
1858 }
1859 
1860 static u8 iwl_mvm_scan_umac_chan_flags_v2(struct iwl_mvm *mvm,
1861 					  struct iwl_mvm_scan_params *params,
1862 					  struct ieee80211_vif *vif)
1863 {
1864 	u8 flags = 0;
1865 
1866 	flags |= IWL_SCAN_CHANNEL_FLAG_ENABLE_CHAN_ORDER;
1867 
1868 	if (iwl_mvm_scan_use_ebs(mvm, vif))
1869 		flags |= IWL_SCAN_CHANNEL_FLAG_EBS |
1870 			IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE |
1871 			IWL_SCAN_CHANNEL_FLAG_CACHE_ADD;
1872 
1873 	/* set fragmented ebs for fragmented scan on HB channels */
1874 	if (iwl_mvm_is_scan_fragmented(params->hb_type))
1875 		flags |= IWL_SCAN_CHANNEL_FLAG_EBS_FRAG;
1876 
1877 	return flags;
1878 }
1879 
1880 static void iwl_mvm_scan_6ghz_passive_scan(struct iwl_mvm *mvm,
1881 					   struct iwl_mvm_scan_params *params,
1882 					   struct ieee80211_vif *vif)
1883 {
1884 	struct ieee80211_supported_band *sband =
1885 		&mvm->nvm_data->bands[NL80211_BAND_6GHZ];
1886 	u32 n_disabled, i;
1887 
1888 	params->enable_6ghz_passive = false;
1889 
1890 	if (params->scan_6ghz)
1891 		return;
1892 
1893 	if (!fw_has_capa(&mvm->fw->ucode_capa,
1894 			 IWL_UCODE_TLV_CAPA_PASSIVE_6GHZ_SCAN)) {
1895 		IWL_DEBUG_SCAN(mvm,
1896 			       "6GHz passive scan: Not supported by FW\n");
1897 		return;
1898 	}
1899 
1900 	/* 6GHz passive scan allowed only on station interface  */
1901 	if (vif->type != NL80211_IFTYPE_STATION) {
1902 		IWL_DEBUG_SCAN(mvm,
1903 			       "6GHz passive scan: not station interface\n");
1904 		return;
1905 	}
1906 
1907 	/*
1908 	 * 6GHz passive scan is allowed while associated in a defined time
1909 	 * interval following HW reset or resume flow
1910 	 */
1911 	if (vif->bss_conf.assoc &&
1912 	    (time_before(mvm->last_reset_or_resume_time_jiffies +
1913 			 (IWL_MVM_6GHZ_PASSIVE_SCAN_ASSOC_TIMEOUT * HZ),
1914 			 jiffies))) {
1915 		IWL_DEBUG_SCAN(mvm, "6GHz passive scan: associated\n");
1916 		return;
1917 	}
1918 
1919 	/* No need for 6GHz passive scan if not enough time elapsed */
1920 	if (time_after(mvm->last_6ghz_passive_scan_jiffies +
1921 		       (IWL_MVM_6GHZ_PASSIVE_SCAN_TIMEOUT * HZ), jiffies)) {
1922 		IWL_DEBUG_SCAN(mvm,
1923 			       "6GHz passive scan: timeout did not expire\n");
1924 		return;
1925 	}
1926 
1927 	/* not enough channels in the regular scan request */
1928 	if (params->n_channels < IWL_MVM_6GHZ_PASSIVE_SCAN_MIN_CHANS) {
1929 		IWL_DEBUG_SCAN(mvm,
1930 			       "6GHz passive scan: not enough channels\n");
1931 		return;
1932 	}
1933 
1934 	for (i = 0; i < params->n_ssids; i++) {
1935 		if (!params->ssids[i].ssid_len)
1936 			break;
1937 	}
1938 
1939 	/* not a wildcard scan, so cannot enable passive 6GHz scan */
1940 	if (i == params->n_ssids) {
1941 		IWL_DEBUG_SCAN(mvm,
1942 			       "6GHz passive scan: no wildcard SSID\n");
1943 		return;
1944 	}
1945 
1946 	if (!sband || !sband->n_channels) {
1947 		IWL_DEBUG_SCAN(mvm,
1948 			       "6GHz passive scan: no 6GHz channels\n");
1949 		return;
1950 	}
1951 
1952 	for (i = 0, n_disabled = 0; i < sband->n_channels; i++) {
1953 		if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED))
1954 			n_disabled++;
1955 	}
1956 
1957 	/*
1958 	 * Not all the 6GHz channels are disabled, so no need for 6GHz passive
1959 	 * scan
1960 	 */
1961 	if (n_disabled != sband->n_channels) {
1962 		IWL_DEBUG_SCAN(mvm,
1963 			       "6GHz passive scan: 6GHz channels enabled\n");
1964 		return;
1965 	}
1966 
1967 	/* all conditions to enable 6ghz passive scan are satisfied */
1968 	IWL_DEBUG_SCAN(mvm, "6GHz passive scan: can be enabled\n");
1969 	params->enable_6ghz_passive = true;
1970 }
1971 
1972 static u16 iwl_mvm_scan_umac_flags_v2(struct iwl_mvm *mvm,
1973 				      struct iwl_mvm_scan_params *params,
1974 				      struct ieee80211_vif *vif,
1975 				      int type)
1976 {
1977 	u16 flags = 0;
1978 
1979 	if (params->n_ssids == 0)
1980 		flags |= IWL_UMAC_SCAN_GEN_FLAGS_V2_FORCE_PASSIVE;
1981 
1982 	if (iwl_mvm_is_scan_fragmented(params->type))
1983 		flags |= IWL_UMAC_SCAN_GEN_FLAGS_V2_FRAGMENTED_LMAC1;
1984 
1985 	if (iwl_mvm_is_scan_fragmented(params->hb_type))
1986 		flags |= IWL_UMAC_SCAN_GEN_FLAGS_V2_FRAGMENTED_LMAC2;
1987 
1988 	if (params->pass_all)
1989 		flags |= IWL_UMAC_SCAN_GEN_FLAGS_V2_PASS_ALL;
1990 	else
1991 		flags |= IWL_UMAC_SCAN_GEN_FLAGS_V2_MATCH;
1992 
1993 	if (!iwl_mvm_is_regular_scan(params))
1994 		flags |= IWL_UMAC_SCAN_GEN_FLAGS_V2_PERIODIC;
1995 
1996 	if (params->iter_notif ||
1997 	    mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_ENABLED)
1998 		flags |= IWL_UMAC_SCAN_GEN_FLAGS_V2_NTFY_ITER_COMPLETE;
1999 
2000 	if (IWL_MVM_ADWELL_ENABLE)
2001 		flags |= IWL_UMAC_SCAN_GEN_FLAGS_V2_ADAPTIVE_DWELL;
2002 
2003 	if (type == IWL_MVM_SCAN_SCHED || type == IWL_MVM_SCAN_NETDETECT)
2004 		flags |= IWL_UMAC_SCAN_GEN_FLAGS_V2_PREEMPTIVE;
2005 
2006 	if ((type == IWL_MVM_SCAN_SCHED || type == IWL_MVM_SCAN_NETDETECT) &&
2007 	    params->flags & NL80211_SCAN_FLAG_COLOCATED_6GHZ)
2008 		flags |= IWL_UMAC_SCAN_GEN_FLAGS_V2_TRIGGER_UHB_SCAN;
2009 
2010 	if (params->enable_6ghz_passive)
2011 		flags |= IWL_UMAC_SCAN_GEN_FLAGS_V2_6GHZ_PASSIVE_SCAN;
2012 
2013 	return flags;
2014 }
2015 
2016 static u16 iwl_mvm_scan_umac_flags(struct iwl_mvm *mvm,
2017 				   struct iwl_mvm_scan_params *params,
2018 				   struct ieee80211_vif *vif)
2019 {
2020 	u16 flags = 0;
2021 
2022 	if (params->n_ssids == 0)
2023 		flags = IWL_UMAC_SCAN_GEN_FLAGS_PASSIVE;
2024 
2025 	if (params->n_ssids == 1 && params->ssids[0].ssid_len != 0)
2026 		flags |= IWL_UMAC_SCAN_GEN_FLAGS_PRE_CONNECT;
2027 
2028 	if (iwl_mvm_is_scan_fragmented(params->type))
2029 		flags |= IWL_UMAC_SCAN_GEN_FLAGS_FRAGMENTED;
2030 
2031 	if (iwl_mvm_is_cdb_supported(mvm) &&
2032 	    iwl_mvm_is_scan_fragmented(params->hb_type))
2033 		flags |= IWL_UMAC_SCAN_GEN_FLAGS_LMAC2_FRAGMENTED;
2034 
2035 	if (iwl_mvm_rrm_scan_needed(mvm) &&
2036 	    fw_has_capa(&mvm->fw->ucode_capa,
2037 			IWL_UCODE_TLV_CAPA_WFA_TPC_REP_IE_SUPPORT))
2038 		flags |= IWL_UMAC_SCAN_GEN_FLAGS_RRM_ENABLED;
2039 
2040 	if (params->pass_all)
2041 		flags |= IWL_UMAC_SCAN_GEN_FLAGS_PASS_ALL;
2042 	else
2043 		flags |= IWL_UMAC_SCAN_GEN_FLAGS_MATCH;
2044 
2045 	if (!iwl_mvm_is_regular_scan(params))
2046 		flags |= IWL_UMAC_SCAN_GEN_FLAGS_PERIODIC;
2047 
2048 	if (params->iter_notif)
2049 		flags |= IWL_UMAC_SCAN_GEN_FLAGS_ITER_COMPLETE;
2050 
2051 #ifdef CONFIG_IWLWIFI_DEBUGFS
2052 	if (mvm->scan_iter_notif_enabled)
2053 		flags |= IWL_UMAC_SCAN_GEN_FLAGS_ITER_COMPLETE;
2054 #endif
2055 
2056 	if (mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_ENABLED)
2057 		flags |= IWL_UMAC_SCAN_GEN_FLAGS_ITER_COMPLETE;
2058 
2059 	if (iwl_mvm_is_adaptive_dwell_supported(mvm) && IWL_MVM_ADWELL_ENABLE)
2060 		flags |= IWL_UMAC_SCAN_GEN_FLAGS_ADAPTIVE_DWELL;
2061 
2062 	/*
2063 	 * Extended dwell is relevant only for low band to start with, as it is
2064 	 * being used for social channles only (1, 6, 11), so we can check
2065 	 * only scan type on low band also for CDB.
2066 	 */
2067 	if (iwl_mvm_is_regular_scan(params) &&
2068 	    vif->type != NL80211_IFTYPE_P2P_DEVICE &&
2069 	    !iwl_mvm_is_scan_fragmented(params->type) &&
2070 	    !iwl_mvm_is_adaptive_dwell_supported(mvm) &&
2071 	    !iwl_mvm_is_oce_supported(mvm))
2072 		flags |= IWL_UMAC_SCAN_GEN_FLAGS_EXTENDED_DWELL;
2073 
2074 	if (iwl_mvm_is_oce_supported(mvm)) {
2075 		if ((params->flags &
2076 		     NL80211_SCAN_FLAG_OCE_PROBE_REQ_HIGH_TX_RATE))
2077 			flags |= IWL_UMAC_SCAN_GEN_FLAGS_PROB_REQ_HIGH_TX_RATE;
2078 		/* Since IWL_UMAC_SCAN_GEN_FLAGS_EXTENDED_DWELL and
2079 		 * NL80211_SCAN_FLAG_OCE_PROBE_REQ_DEFERRAL_SUPPRESSION shares
2080 		 * the same bit, we need to make sure that we use this bit here
2081 		 * only when IWL_UMAC_SCAN_GEN_FLAGS_EXTENDED_DWELL cannot be
2082 		 * used. */
2083 		if ((params->flags &
2084 		     NL80211_SCAN_FLAG_OCE_PROBE_REQ_DEFERRAL_SUPPRESSION) &&
2085 		     !WARN_ON_ONCE(!iwl_mvm_is_adaptive_dwell_supported(mvm)))
2086 			flags |= IWL_UMAC_SCAN_GEN_FLAGS_PROB_REQ_DEFER_SUPP;
2087 		if ((params->flags & NL80211_SCAN_FLAG_FILS_MAX_CHANNEL_TIME))
2088 			flags |= IWL_UMAC_SCAN_GEN_FLAGS_MAX_CHNL_TIME;
2089 	}
2090 
2091 	return flags;
2092 }
2093 
2094 static int
2095 iwl_mvm_fill_scan_sched_params(struct iwl_mvm_scan_params *params,
2096 			       struct iwl_scan_umac_schedule *schedule,
2097 			       __le16 *delay)
2098 {
2099 	int i;
2100 	if (WARN_ON(!params->n_scan_plans ||
2101 		    params->n_scan_plans > IWL_MAX_SCHED_SCAN_PLANS))
2102 		return -EINVAL;
2103 
2104 	for (i = 0; i < params->n_scan_plans; i++) {
2105 		struct cfg80211_sched_scan_plan *scan_plan =
2106 			&params->scan_plans[i];
2107 
2108 		schedule[i].iter_count = scan_plan->iterations;
2109 		schedule[i].interval =
2110 			cpu_to_le16(scan_plan->interval);
2111 	}
2112 
2113 	/*
2114 	 * If the number of iterations of the last scan plan is set to
2115 	 * zero, it should run infinitely. However, this is not always the case.
2116 	 * For example, when regular scan is requested the driver sets one scan
2117 	 * plan with one iteration.
2118 	 */
2119 	if (!schedule[params->n_scan_plans - 1].iter_count)
2120 		schedule[params->n_scan_plans - 1].iter_count = 0xff;
2121 
2122 	*delay = cpu_to_le16(params->delay);
2123 
2124 	return 0;
2125 }
2126 
2127 static int iwl_mvm_scan_umac(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2128 			     struct iwl_mvm_scan_params *params,
2129 			     int type, int uid)
2130 {
2131 	struct iwl_scan_req_umac *cmd = mvm->scan_cmd;
2132 	struct iwl_scan_umac_chan_param *chan_param;
2133 	void *cmd_data = iwl_mvm_get_scan_req_umac_data(mvm);
2134 	void *sec_part = cmd_data + sizeof(struct iwl_scan_channel_cfg_umac) *
2135 		mvm->fw->ucode_capa.n_scan_channels;
2136 	struct iwl_scan_req_umac_tail_v2 *tail_v2 =
2137 		(struct iwl_scan_req_umac_tail_v2 *)sec_part;
2138 	struct iwl_scan_req_umac_tail_v1 *tail_v1;
2139 	struct iwl_ssid_ie *direct_scan;
2140 	int ret = 0;
2141 	u32 ssid_bitmap = 0;
2142 	u8 channel_flags = 0;
2143 	u16 gen_flags;
2144 	struct iwl_mvm_vif *scan_vif = iwl_mvm_vif_from_mac80211(vif);
2145 
2146 	chan_param = iwl_mvm_get_scan_req_umac_channel(mvm);
2147 
2148 	iwl_mvm_scan_umac_dwell(mvm, cmd, params);
2149 
2150 	mvm->scan_uid_status[uid] = type;
2151 
2152 	cmd->uid = cpu_to_le32(uid);
2153 	gen_flags = iwl_mvm_scan_umac_flags(mvm, params, vif);
2154 	cmd->general_flags = cpu_to_le16(gen_flags);
2155 	if (iwl_mvm_is_adaptive_dwell_v2_supported(mvm)) {
2156 		if (gen_flags & IWL_UMAC_SCAN_GEN_FLAGS_FRAGMENTED)
2157 			cmd->v8.num_of_fragments[SCAN_LB_LMAC_IDX] =
2158 							IWL_SCAN_NUM_OF_FRAGS;
2159 		if (gen_flags & IWL_UMAC_SCAN_GEN_FLAGS_LMAC2_FRAGMENTED)
2160 			cmd->v8.num_of_fragments[SCAN_HB_LMAC_IDX] =
2161 							IWL_SCAN_NUM_OF_FRAGS;
2162 
2163 		cmd->v8.general_flags2 =
2164 			IWL_UMAC_SCAN_GEN_FLAGS2_ALLOW_CHNL_REORDER;
2165 	}
2166 
2167 	cmd->scan_start_mac_id = scan_vif->id;
2168 
2169 	if (type == IWL_MVM_SCAN_SCHED || type == IWL_MVM_SCAN_NETDETECT)
2170 		cmd->flags = cpu_to_le32(IWL_UMAC_SCAN_FLAG_PREEMPTIVE);
2171 
2172 	if (iwl_mvm_scan_use_ebs(mvm, vif)) {
2173 		channel_flags = IWL_SCAN_CHANNEL_FLAG_EBS |
2174 				IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE |
2175 				IWL_SCAN_CHANNEL_FLAG_CACHE_ADD;
2176 
2177 		/* set fragmented ebs for fragmented scan on HB channels */
2178 		if (iwl_mvm_is_frag_ebs_supported(mvm)) {
2179 			if (gen_flags &
2180 			    IWL_UMAC_SCAN_GEN_FLAGS_LMAC2_FRAGMENTED ||
2181 			    (!iwl_mvm_is_cdb_supported(mvm) &&
2182 			     gen_flags & IWL_UMAC_SCAN_GEN_FLAGS_FRAGMENTED))
2183 				channel_flags |= IWL_SCAN_CHANNEL_FLAG_EBS_FRAG;
2184 		}
2185 	}
2186 
2187 	chan_param->flags = channel_flags;
2188 	chan_param->count = params->n_channels;
2189 
2190 	ret = iwl_mvm_fill_scan_sched_params(params, tail_v2->schedule,
2191 					     &tail_v2->delay);
2192 	if (ret) {
2193 		mvm->scan_uid_status[uid] = 0;
2194 		return ret;
2195 	}
2196 
2197 	if (iwl_mvm_is_scan_ext_chan_supported(mvm)) {
2198 		tail_v2->preq = params->preq;
2199 		direct_scan = tail_v2->direct_scan;
2200 	} else {
2201 		tail_v1 = (struct iwl_scan_req_umac_tail_v1 *)sec_part;
2202 		iwl_mvm_scan_set_legacy_probe_req(&tail_v1->preq,
2203 						  &params->preq);
2204 		direct_scan = tail_v1->direct_scan;
2205 	}
2206 	iwl_scan_build_ssids(params, direct_scan, &ssid_bitmap);
2207 	iwl_mvm_umac_scan_cfg_channels(mvm, params->channels,
2208 				       params->n_channels, ssid_bitmap,
2209 				       cmd_data);
2210 	return 0;
2211 }
2212 
2213 static void
2214 iwl_mvm_scan_umac_fill_general_p_v10(struct iwl_mvm *mvm,
2215 				     struct iwl_mvm_scan_params *params,
2216 				     struct ieee80211_vif *vif,
2217 				     struct iwl_scan_general_params_v10 *gp,
2218 				     u16 gen_flags)
2219 {
2220 	struct iwl_mvm_vif *scan_vif = iwl_mvm_vif_from_mac80211(vif);
2221 
2222 	iwl_mvm_scan_umac_dwell_v10(mvm, gp, params);
2223 
2224 	gp->flags = cpu_to_le16(gen_flags);
2225 
2226 	if (gen_flags & IWL_UMAC_SCAN_GEN_FLAGS_V2_FRAGMENTED_LMAC1)
2227 		gp->num_of_fragments[SCAN_LB_LMAC_IDX] = IWL_SCAN_NUM_OF_FRAGS;
2228 	if (gen_flags & IWL_UMAC_SCAN_GEN_FLAGS_V2_FRAGMENTED_LMAC2)
2229 		gp->num_of_fragments[SCAN_HB_LMAC_IDX] = IWL_SCAN_NUM_OF_FRAGS;
2230 
2231 	gp->scan_start_mac_id = scan_vif->id;
2232 }
2233 
2234 static void
2235 iwl_mvm_scan_umac_fill_probe_p_v3(struct iwl_mvm_scan_params *params,
2236 				  struct iwl_scan_probe_params_v3 *pp)
2237 {
2238 	pp->preq = params->preq;
2239 	pp->ssid_num = params->n_ssids;
2240 	iwl_scan_build_ssids(params, pp->direct_scan, NULL);
2241 }
2242 
2243 static void
2244 iwl_mvm_scan_umac_fill_probe_p_v4(struct iwl_mvm_scan_params *params,
2245 				  struct iwl_scan_probe_params_v4 *pp,
2246 				  u32 *bitmap_ssid)
2247 {
2248 	pp->preq = params->preq;
2249 	iwl_scan_build_ssids(params, pp->direct_scan, bitmap_ssid);
2250 }
2251 
2252 static void
2253 iwl_mvm_scan_umac_fill_ch_p_v4(struct iwl_mvm *mvm,
2254 			       struct iwl_mvm_scan_params *params,
2255 			       struct ieee80211_vif *vif,
2256 			       struct iwl_scan_channel_params_v4 *cp,
2257 			       u32 channel_cfg_flags)
2258 {
2259 	cp->flags = iwl_mvm_scan_umac_chan_flags_v2(mvm, params, vif);
2260 	cp->count = params->n_channels;
2261 	cp->num_of_aps_override = IWL_SCAN_ADWELL_N_APS_GO_FRIENDLY;
2262 
2263 	iwl_mvm_umac_scan_cfg_channels_v4(mvm, params->channels, cp,
2264 					  params->n_channels,
2265 					  channel_cfg_flags,
2266 					  vif->type);
2267 }
2268 
2269 static void
2270 iwl_mvm_scan_umac_fill_ch_p_v6(struct iwl_mvm *mvm,
2271 			       struct iwl_mvm_scan_params *params,
2272 			       struct ieee80211_vif *vif,
2273 			       struct iwl_scan_channel_params_v6 *cp,
2274 			       u32 channel_cfg_flags)
2275 {
2276 	cp->flags = iwl_mvm_scan_umac_chan_flags_v2(mvm, params, vif);
2277 	cp->count = params->n_channels;
2278 	cp->n_aps_override[0] = IWL_SCAN_ADWELL_N_APS_GO_FRIENDLY;
2279 	cp->n_aps_override[1] = IWL_SCAN_ADWELL_N_APS_SOCIAL_CHS;
2280 
2281 	iwl_mvm_umac_scan_cfg_channels_v6(mvm, params->channels, cp,
2282 					  params->n_channels,
2283 					  channel_cfg_flags,
2284 					  vif->type);
2285 
2286 	if (params->enable_6ghz_passive) {
2287 		struct ieee80211_supported_band *sband =
2288 			&mvm->nvm_data->bands[NL80211_BAND_6GHZ];
2289 		u32 i;
2290 
2291 		for (i = 0; i < sband->n_channels; i++) {
2292 			struct ieee80211_channel *channel =
2293 				&sband->channels[i];
2294 
2295 			struct iwl_scan_channel_cfg_umac *cfg =
2296 				&cp->channel_config[cp->count];
2297 
2298 			if (!cfg80211_channel_is_psc(channel))
2299 				continue;
2300 
2301 			cfg->flags = 0;
2302 			cfg->v2.channel_num = channel->hw_value;
2303 			cfg->v2.band = PHY_BAND_6;
2304 			cfg->v2.iter_count = 1;
2305 			cfg->v2.iter_interval = 0;
2306 			cp->count++;
2307 		}
2308 	}
2309 }
2310 
2311 static int iwl_mvm_scan_umac_v12(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2312 				 struct iwl_mvm_scan_params *params, int type,
2313 				 int uid)
2314 {
2315 	struct iwl_scan_req_umac_v12 *cmd = mvm->scan_cmd;
2316 	struct iwl_scan_req_params_v12 *scan_p = &cmd->scan_params;
2317 	int ret;
2318 	u16 gen_flags;
2319 
2320 	mvm->scan_uid_status[uid] = type;
2321 
2322 	cmd->ooc_priority = cpu_to_le32(iwl_mvm_scan_umac_ooc_priority(params));
2323 	cmd->uid = cpu_to_le32(uid);
2324 
2325 	gen_flags = iwl_mvm_scan_umac_flags_v2(mvm, params, vif, type);
2326 	iwl_mvm_scan_umac_fill_general_p_v10(mvm, params, vif,
2327 					     &scan_p->general_params,
2328 					     gen_flags);
2329 
2330 	ret = iwl_mvm_fill_scan_sched_params(params,
2331 					     scan_p->periodic_params.schedule,
2332 					     &scan_p->periodic_params.delay);
2333 	if (ret)
2334 		return ret;
2335 
2336 	iwl_mvm_scan_umac_fill_probe_p_v3(params, &scan_p->probe_params);
2337 	iwl_mvm_scan_umac_fill_ch_p_v4(mvm, params, vif,
2338 				       &scan_p->channel_params, 0);
2339 
2340 	return 0;
2341 }
2342 
2343 static int iwl_mvm_scan_umac_v14(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2344 				 struct iwl_mvm_scan_params *params, int type,
2345 				 int uid)
2346 {
2347 	struct iwl_scan_req_umac_v14 *cmd = mvm->scan_cmd;
2348 	struct iwl_scan_req_params_v14 *scan_p = &cmd->scan_params;
2349 	struct iwl_scan_channel_params_v6 *cp = &scan_p->channel_params;
2350 	struct iwl_scan_probe_params_v4 *pb = &scan_p->probe_params;
2351 	int ret;
2352 	u16 gen_flags;
2353 	u32 bitmap_ssid = 0;
2354 
2355 	mvm->scan_uid_status[uid] = type;
2356 
2357 	cmd->ooc_priority = cpu_to_le32(iwl_mvm_scan_umac_ooc_priority(params));
2358 	cmd->uid = cpu_to_le32(uid);
2359 
2360 	gen_flags = iwl_mvm_scan_umac_flags_v2(mvm, params, vif, type);
2361 	iwl_mvm_scan_umac_fill_general_p_v10(mvm, params, vif,
2362 					     &scan_p->general_params,
2363 					     gen_flags);
2364 
2365 	ret = iwl_mvm_fill_scan_sched_params(params,
2366 					     scan_p->periodic_params.schedule,
2367 					     &scan_p->periodic_params.delay);
2368 	if (ret)
2369 		return ret;
2370 
2371 	iwl_mvm_scan_umac_fill_probe_p_v4(params, &scan_p->probe_params,
2372 					  &bitmap_ssid);
2373 	if (!params->scan_6ghz) {
2374 		iwl_mvm_scan_umac_fill_ch_p_v6(mvm, params, vif,
2375 					       &scan_p->channel_params, bitmap_ssid);
2376 
2377 		return 0;
2378 	}
2379 	cp->flags = iwl_mvm_scan_umac_chan_flags_v2(mvm, params, vif);
2380 	cp->n_aps_override[0] = IWL_SCAN_ADWELL_N_APS_GO_FRIENDLY;
2381 	cp->n_aps_override[1] = IWL_SCAN_ADWELL_N_APS_SOCIAL_CHS;
2382 
2383 	ret = iwl_mvm_umac_scan_fill_6g_chan_list(params, pb->short_ssid,
2384 						  pb->bssid_array[0],
2385 						  &pb->short_ssid_num,
2386 						  &pb->bssid_num);
2387 	if (ret)
2388 		return ret;
2389 
2390 	iwl_mvm_umac_scan_cfg_channels_v6_6g(params,
2391 					     params->n_channels,
2392 					     pb->short_ssid,
2393 					     pb->bssid_array[0],
2394 					     pb->short_ssid_num,
2395 					     pb->bssid_num, cp,
2396 					     vif->type);
2397 	cp->count = params->n_channels;
2398 	if (!params->n_ssids ||
2399 	    (params->n_ssids == 1 && !params->ssids[0].ssid_len))
2400 		cp->flags |= IWL_SCAN_CHANNEL_FLAG_6G_PSC_NO_FILTER;
2401 
2402 	return 0;
2403 }
2404 
2405 static int iwl_mvm_num_scans(struct iwl_mvm *mvm)
2406 {
2407 	return hweight32(mvm->scan_status & IWL_MVM_SCAN_MASK);
2408 }
2409 
2410 static int iwl_mvm_check_running_scans(struct iwl_mvm *mvm, int type)
2411 {
2412 	bool unified_image = fw_has_capa(&mvm->fw->ucode_capa,
2413 					 IWL_UCODE_TLV_CAPA_CNSLDTD_D3_D0_IMG);
2414 
2415 	/* This looks a bit arbitrary, but the idea is that if we run
2416 	 * out of possible simultaneous scans and the userspace is
2417 	 * trying to run a scan type that is already running, we
2418 	 * return -EBUSY.  But if the userspace wants to start a
2419 	 * different type of scan, we stop the opposite type to make
2420 	 * space for the new request.  The reason is backwards
2421 	 * compatibility with old wpa_supplicant that wouldn't stop a
2422 	 * scheduled scan before starting a normal scan.
2423 	 */
2424 
2425 	/* FW supports only a single periodic scan */
2426 	if ((type == IWL_MVM_SCAN_SCHED || type == IWL_MVM_SCAN_NETDETECT) &&
2427 	    mvm->scan_status & (IWL_MVM_SCAN_SCHED | IWL_MVM_SCAN_NETDETECT))
2428 		return -EBUSY;
2429 
2430 	if (iwl_mvm_num_scans(mvm) < mvm->max_scans)
2431 		return 0;
2432 
2433 	/* Use a switch, even though this is a bitmask, so that more
2434 	 * than one bits set will fall in default and we will warn.
2435 	 */
2436 	switch (type) {
2437 	case IWL_MVM_SCAN_REGULAR:
2438 		if (mvm->scan_status & IWL_MVM_SCAN_REGULAR_MASK)
2439 			return -EBUSY;
2440 		return iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_SCHED, true);
2441 	case IWL_MVM_SCAN_SCHED:
2442 		if (mvm->scan_status & IWL_MVM_SCAN_SCHED_MASK)
2443 			return -EBUSY;
2444 		return iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_REGULAR, true);
2445 	case IWL_MVM_SCAN_NETDETECT:
2446 		/* For non-unified images, there's no need to stop
2447 		 * anything for net-detect since the firmware is
2448 		 * restarted anyway.  This way, any sched scans that
2449 		 * were running will be restarted when we resume.
2450 		 */
2451 		if (!unified_image)
2452 			return 0;
2453 
2454 		/* If this is a unified image and we ran out of scans,
2455 		 * we need to stop something.  Prefer stopping regular
2456 		 * scans, because the results are useless at this
2457 		 * point, and we should be able to keep running
2458 		 * another scheduled scan while suspended.
2459 		 */
2460 		if (mvm->scan_status & IWL_MVM_SCAN_REGULAR_MASK)
2461 			return iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_REGULAR,
2462 						 true);
2463 		if (mvm->scan_status & IWL_MVM_SCAN_SCHED_MASK)
2464 			return iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_SCHED,
2465 						 true);
2466 		/* Something is wrong if no scan was running but we
2467 		 * ran out of scans.
2468 		 */
2469 		fallthrough;
2470 	default:
2471 		WARN_ON(1);
2472 		break;
2473 	}
2474 
2475 	return -EIO;
2476 }
2477 
2478 #define SCAN_TIMEOUT 20000
2479 
2480 void iwl_mvm_scan_timeout_wk(struct work_struct *work)
2481 {
2482 	struct delayed_work *delayed_work = to_delayed_work(work);
2483 	struct iwl_mvm *mvm = container_of(delayed_work, struct iwl_mvm,
2484 					   scan_timeout_dwork);
2485 
2486 	IWL_ERR(mvm, "regular scan timed out\n");
2487 
2488 	iwl_force_nmi(mvm->trans);
2489 }
2490 
2491 static void iwl_mvm_fill_scan_type(struct iwl_mvm *mvm,
2492 				   struct iwl_mvm_scan_params *params,
2493 				   struct ieee80211_vif *vif)
2494 {
2495 	if (iwl_mvm_is_cdb_supported(mvm)) {
2496 		params->type =
2497 			iwl_mvm_get_scan_type_band(mvm, vif,
2498 						   NL80211_BAND_2GHZ);
2499 		params->hb_type =
2500 			iwl_mvm_get_scan_type_band(mvm, vif,
2501 						   NL80211_BAND_5GHZ);
2502 	} else {
2503 		params->type = iwl_mvm_get_scan_type(mvm, vif);
2504 	}
2505 }
2506 
2507 struct iwl_scan_umac_handler {
2508 	u8 version;
2509 	int (*handler)(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2510 		       struct iwl_mvm_scan_params *params, int type, int uid);
2511 };
2512 
2513 #define IWL_SCAN_UMAC_HANDLER(_ver) {		\
2514 	.version = _ver,			\
2515 	.handler = iwl_mvm_scan_umac_v##_ver,	\
2516 }
2517 
2518 static const struct iwl_scan_umac_handler iwl_scan_umac_handlers[] = {
2519 	/* set the newest version first to shorten the list traverse time */
2520 	IWL_SCAN_UMAC_HANDLER(14),
2521 	IWL_SCAN_UMAC_HANDLER(12),
2522 };
2523 
2524 static int iwl_mvm_build_scan_cmd(struct iwl_mvm *mvm,
2525 				  struct ieee80211_vif *vif,
2526 				  struct iwl_host_cmd *hcmd,
2527 				  struct iwl_mvm_scan_params *params,
2528 				  int type)
2529 {
2530 	int uid, i, err;
2531 	u8 scan_ver;
2532 
2533 	lockdep_assert_held(&mvm->mutex);
2534 	memset(mvm->scan_cmd, 0, ksize(mvm->scan_cmd));
2535 
2536 	if (!fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) {
2537 		hcmd->id = SCAN_OFFLOAD_REQUEST_CMD;
2538 
2539 		return iwl_mvm_scan_lmac(mvm, vif, params);
2540 	}
2541 
2542 	uid = iwl_mvm_scan_uid_by_status(mvm, 0);
2543 	if (uid < 0)
2544 		return uid;
2545 
2546 	hcmd->id = iwl_cmd_id(SCAN_REQ_UMAC, IWL_ALWAYS_LONG_GROUP, 0);
2547 
2548 	scan_ver = iwl_fw_lookup_cmd_ver(mvm->fw, IWL_ALWAYS_LONG_GROUP,
2549 					 SCAN_REQ_UMAC,
2550 					 IWL_FW_CMD_VER_UNKNOWN);
2551 
2552 	for (i = 0; i < ARRAY_SIZE(iwl_scan_umac_handlers); i++) {
2553 		const struct iwl_scan_umac_handler *ver_handler =
2554 			&iwl_scan_umac_handlers[i];
2555 
2556 		if (ver_handler->version != scan_ver)
2557 			continue;
2558 
2559 		return ver_handler->handler(mvm, vif, params, type, uid);
2560 	}
2561 
2562 	err = iwl_mvm_scan_umac(mvm, vif, params, type, uid);
2563 	if (err)
2564 		return err;
2565 
2566 	return uid;
2567 }
2568 
2569 int iwl_mvm_reg_scan_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2570 			   struct cfg80211_scan_request *req,
2571 			   struct ieee80211_scan_ies *ies)
2572 {
2573 	struct iwl_host_cmd hcmd = {
2574 		.len = { iwl_mvm_scan_size(mvm), },
2575 		.data = { mvm->scan_cmd, },
2576 		.dataflags = { IWL_HCMD_DFL_NOCOPY, },
2577 	};
2578 	struct iwl_mvm_scan_params params = {};
2579 	int ret, uid;
2580 	struct cfg80211_sched_scan_plan scan_plan = { .iterations = 1 };
2581 
2582 	lockdep_assert_held(&mvm->mutex);
2583 
2584 	if (iwl_mvm_is_lar_supported(mvm) && !mvm->lar_regdom_set) {
2585 		IWL_ERR(mvm, "scan while LAR regdomain is not set\n");
2586 		return -EBUSY;
2587 	}
2588 
2589 	ret = iwl_mvm_check_running_scans(mvm, IWL_MVM_SCAN_REGULAR);
2590 	if (ret)
2591 		return ret;
2592 
2593 	/* we should have failed registration if scan_cmd was NULL */
2594 	if (WARN_ON(!mvm->scan_cmd))
2595 		return -ENOMEM;
2596 
2597 	if (!iwl_mvm_scan_fits(mvm, req->n_ssids, ies, req->n_channels))
2598 		return -ENOBUFS;
2599 
2600 	params.n_ssids = req->n_ssids;
2601 	params.flags = req->flags;
2602 	params.n_channels = req->n_channels;
2603 	params.delay = 0;
2604 	params.ssids = req->ssids;
2605 	params.channels = req->channels;
2606 	params.mac_addr = req->mac_addr;
2607 	params.mac_addr_mask = req->mac_addr_mask;
2608 	params.no_cck = req->no_cck;
2609 	params.pass_all = true;
2610 	params.n_match_sets = 0;
2611 	params.match_sets = NULL;
2612 
2613 	params.scan_plans = &scan_plan;
2614 	params.n_scan_plans = 1;
2615 
2616 	params.n_6ghz_params = req->n_6ghz_params;
2617 	params.scan_6ghz_params = req->scan_6ghz_params;
2618 	params.scan_6ghz = req->scan_6ghz;
2619 	iwl_mvm_fill_scan_type(mvm, &params, vif);
2620 
2621 	if (req->duration)
2622 		params.iter_notif = true;
2623 
2624 	iwl_mvm_build_scan_probe(mvm, vif, ies, &params);
2625 
2626 	iwl_mvm_scan_6ghz_passive_scan(mvm, &params, vif);
2627 
2628 	uid = iwl_mvm_build_scan_cmd(mvm, vif, &hcmd, &params,
2629 				     IWL_MVM_SCAN_REGULAR);
2630 
2631 	if (uid < 0)
2632 		return uid;
2633 
2634 	iwl_mvm_pause_tcm(mvm, false);
2635 
2636 	ret = iwl_mvm_send_cmd(mvm, &hcmd);
2637 	if (ret) {
2638 		/* If the scan failed, it usually means that the FW was unable
2639 		 * to allocate the time events. Warn on it, but maybe we
2640 		 * should try to send the command again with different params.
2641 		 */
2642 		IWL_ERR(mvm, "Scan failed! ret %d\n", ret);
2643 		iwl_mvm_resume_tcm(mvm);
2644 		mvm->scan_uid_status[uid] = 0;
2645 		return ret;
2646 	}
2647 
2648 	IWL_DEBUG_SCAN(mvm, "Scan request was sent successfully\n");
2649 	mvm->scan_status |= IWL_MVM_SCAN_REGULAR;
2650 	mvm->scan_vif = iwl_mvm_vif_from_mac80211(vif);
2651 
2652 	if (params.enable_6ghz_passive)
2653 		mvm->last_6ghz_passive_scan_jiffies = jiffies;
2654 
2655 	schedule_delayed_work(&mvm->scan_timeout_dwork,
2656 			      msecs_to_jiffies(SCAN_TIMEOUT));
2657 
2658 	return 0;
2659 }
2660 
2661 int iwl_mvm_sched_scan_start(struct iwl_mvm *mvm,
2662 			     struct ieee80211_vif *vif,
2663 			     struct cfg80211_sched_scan_request *req,
2664 			     struct ieee80211_scan_ies *ies,
2665 			     int type)
2666 {
2667 	struct iwl_host_cmd hcmd = {
2668 		.len = { iwl_mvm_scan_size(mvm), },
2669 		.data = { mvm->scan_cmd, },
2670 		.dataflags = { IWL_HCMD_DFL_NOCOPY, },
2671 	};
2672 	struct iwl_mvm_scan_params params = {};
2673 	int ret, uid;
2674 	int i, j;
2675 	bool non_psc_included = false;
2676 
2677 	lockdep_assert_held(&mvm->mutex);
2678 
2679 	if (iwl_mvm_is_lar_supported(mvm) && !mvm->lar_regdom_set) {
2680 		IWL_ERR(mvm, "sched-scan while LAR regdomain is not set\n");
2681 		return -EBUSY;
2682 	}
2683 
2684 	ret = iwl_mvm_check_running_scans(mvm, type);
2685 	if (ret)
2686 		return ret;
2687 
2688 	/* we should have failed registration if scan_cmd was NULL */
2689 	if (WARN_ON(!mvm->scan_cmd))
2690 		return -ENOMEM;
2691 
2692 
2693 	params.n_ssids = req->n_ssids;
2694 	params.flags = req->flags;
2695 	params.n_channels = req->n_channels;
2696 	params.ssids = req->ssids;
2697 	params.channels = req->channels;
2698 	params.mac_addr = req->mac_addr;
2699 	params.mac_addr_mask = req->mac_addr_mask;
2700 	params.no_cck = false;
2701 	params.pass_all =  iwl_mvm_scan_pass_all(mvm, req);
2702 	params.n_match_sets = req->n_match_sets;
2703 	params.match_sets = req->match_sets;
2704 	if (!req->n_scan_plans)
2705 		return -EINVAL;
2706 
2707 	params.n_scan_plans = req->n_scan_plans;
2708 	params.scan_plans = req->scan_plans;
2709 
2710 	iwl_mvm_fill_scan_type(mvm, &params, vif);
2711 
2712 	/* In theory, LMAC scans can handle a 32-bit delay, but since
2713 	 * waiting for over 18 hours to start the scan is a bit silly
2714 	 * and to keep it aligned with UMAC scans (which only support
2715 	 * 16-bit delays), trim it down to 16-bits.
2716 	 */
2717 	if (req->delay > U16_MAX) {
2718 		IWL_DEBUG_SCAN(mvm,
2719 			       "delay value is > 16-bits, set to max possible\n");
2720 		params.delay = U16_MAX;
2721 	} else {
2722 		params.delay = req->delay;
2723 	}
2724 
2725 	ret = iwl_mvm_config_sched_scan_profiles(mvm, req);
2726 	if (ret)
2727 		return ret;
2728 
2729 	iwl_mvm_build_scan_probe(mvm, vif, ies, &params);
2730 
2731 	/* for 6 GHZ band only PSC channels need to be added */
2732 	for (i = 0; i < params.n_channels; i++) {
2733 		struct ieee80211_channel *channel = params.channels[i];
2734 
2735 		if (channel->band == NL80211_BAND_6GHZ &&
2736 		    !cfg80211_channel_is_psc(channel)) {
2737 			non_psc_included = true;
2738 			break;
2739 		}
2740 	}
2741 
2742 	if (non_psc_included) {
2743 		params.channels = kmemdup(params.channels,
2744 					  sizeof(params.channels[0]) *
2745 					  params.n_channels,
2746 					  GFP_KERNEL);
2747 		if (!params.channels)
2748 			return -ENOMEM;
2749 
2750 		for (i = j = 0; i < params.n_channels; i++) {
2751 			if (params.channels[i]->band == NL80211_BAND_6GHZ &&
2752 			    !cfg80211_channel_is_psc(params.channels[i]))
2753 				continue;
2754 			params.channels[j++] = params.channels[i];
2755 		}
2756 		params.n_channels = j;
2757 	}
2758 
2759 	if (non_psc_included &&
2760 	    !iwl_mvm_scan_fits(mvm, req->n_ssids, ies, params.n_channels)) {
2761 		kfree(params.channels);
2762 		return -ENOBUFS;
2763 	}
2764 
2765 	uid = iwl_mvm_build_scan_cmd(mvm, vif, &hcmd, &params, type);
2766 
2767 	if (non_psc_included)
2768 		kfree(params.channels);
2769 	if (uid < 0)
2770 		return uid;
2771 
2772 	ret = iwl_mvm_send_cmd(mvm, &hcmd);
2773 	if (!ret) {
2774 		IWL_DEBUG_SCAN(mvm,
2775 			       "Sched scan request was sent successfully\n");
2776 		mvm->scan_status |= type;
2777 	} else {
2778 		/* If the scan failed, it usually means that the FW was unable
2779 		 * to allocate the time events. Warn on it, but maybe we
2780 		 * should try to send the command again with different params.
2781 		 */
2782 		IWL_ERR(mvm, "Sched scan failed! ret %d\n", ret);
2783 		mvm->scan_uid_status[uid] = 0;
2784 		mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED;
2785 	}
2786 
2787 	return ret;
2788 }
2789 
2790 void iwl_mvm_rx_umac_scan_complete_notif(struct iwl_mvm *mvm,
2791 					 struct iwl_rx_cmd_buffer *rxb)
2792 {
2793 	struct iwl_rx_packet *pkt = rxb_addr(rxb);
2794 	struct iwl_umac_scan_complete *notif = (void *)pkt->data;
2795 	u32 uid = __le32_to_cpu(notif->uid);
2796 	bool aborted = (notif->status == IWL_SCAN_OFFLOAD_ABORTED);
2797 
2798 	if (WARN_ON(!(mvm->scan_uid_status[uid] & mvm->scan_status)))
2799 		return;
2800 
2801 	/* if the scan is already stopping, we don't need to notify mac80211 */
2802 	if (mvm->scan_uid_status[uid] == IWL_MVM_SCAN_REGULAR) {
2803 		struct cfg80211_scan_info info = {
2804 			.aborted = aborted,
2805 			.scan_start_tsf = mvm->scan_start,
2806 		};
2807 
2808 		memcpy(info.tsf_bssid, mvm->scan_vif->bssid, ETH_ALEN);
2809 		ieee80211_scan_completed(mvm->hw, &info);
2810 		mvm->scan_vif = NULL;
2811 		cancel_delayed_work(&mvm->scan_timeout_dwork);
2812 		iwl_mvm_resume_tcm(mvm);
2813 	} else if (mvm->scan_uid_status[uid] == IWL_MVM_SCAN_SCHED) {
2814 		ieee80211_sched_scan_stopped(mvm->hw);
2815 		mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED;
2816 	}
2817 
2818 	mvm->scan_status &= ~mvm->scan_uid_status[uid];
2819 	IWL_DEBUG_SCAN(mvm,
2820 		       "Scan completed, uid %u type %u, status %s, EBS status %s\n",
2821 		       uid, mvm->scan_uid_status[uid],
2822 		       notif->status == IWL_SCAN_OFFLOAD_COMPLETED ?
2823 				"completed" : "aborted",
2824 		       iwl_mvm_ebs_status_str(notif->ebs_status));
2825 	IWL_DEBUG_SCAN(mvm,
2826 		       "Last line %d, Last iteration %d, Time from last iteration %d\n",
2827 		       notif->last_schedule, notif->last_iter,
2828 		       __le32_to_cpu(notif->time_from_last_iter));
2829 
2830 	if (notif->ebs_status != IWL_SCAN_EBS_SUCCESS &&
2831 	    notif->ebs_status != IWL_SCAN_EBS_INACTIVE)
2832 		mvm->last_ebs_successful = false;
2833 
2834 	mvm->scan_uid_status[uid] = 0;
2835 }
2836 
2837 void iwl_mvm_rx_umac_scan_iter_complete_notif(struct iwl_mvm *mvm,
2838 					      struct iwl_rx_cmd_buffer *rxb)
2839 {
2840 	struct iwl_rx_packet *pkt = rxb_addr(rxb);
2841 	struct iwl_umac_scan_iter_complete_notif *notif = (void *)pkt->data;
2842 
2843 	mvm->scan_start = le64_to_cpu(notif->start_tsf);
2844 
2845 	IWL_DEBUG_SCAN(mvm,
2846 		       "UMAC Scan iteration complete: status=0x%x scanned_channels=%d\n",
2847 		       notif->status, notif->scanned_channels);
2848 
2849 	if (mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_FOUND) {
2850 		IWL_DEBUG_SCAN(mvm, "Pass all scheduled scan results found\n");
2851 		ieee80211_sched_scan_results(mvm->hw);
2852 		mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_ENABLED;
2853 	}
2854 
2855 	IWL_DEBUG_SCAN(mvm,
2856 		       "UMAC Scan iteration complete: scan started at %llu (TSF)\n",
2857 		       mvm->scan_start);
2858 }
2859 
2860 static int iwl_mvm_umac_scan_abort(struct iwl_mvm *mvm, int type)
2861 {
2862 	struct iwl_umac_scan_abort cmd = {};
2863 	int uid, ret;
2864 
2865 	lockdep_assert_held(&mvm->mutex);
2866 
2867 	/* We should always get a valid index here, because we already
2868 	 * checked that this type of scan was running in the generic
2869 	 * code.
2870 	 */
2871 	uid = iwl_mvm_scan_uid_by_status(mvm, type);
2872 	if (WARN_ON_ONCE(uid < 0))
2873 		return uid;
2874 
2875 	cmd.uid = cpu_to_le32(uid);
2876 
2877 	IWL_DEBUG_SCAN(mvm, "Sending scan abort, uid %u\n", uid);
2878 
2879 	ret = iwl_mvm_send_cmd_pdu(mvm,
2880 				   iwl_cmd_id(SCAN_ABORT_UMAC,
2881 					      IWL_ALWAYS_LONG_GROUP, 0),
2882 				   0, sizeof(cmd), &cmd);
2883 	if (!ret)
2884 		mvm->scan_uid_status[uid] = type << IWL_MVM_SCAN_STOPPING_SHIFT;
2885 
2886 	return ret;
2887 }
2888 
2889 static int iwl_mvm_scan_stop_wait(struct iwl_mvm *mvm, int type)
2890 {
2891 	struct iwl_notification_wait wait_scan_done;
2892 	static const u16 scan_done_notif[] = { SCAN_COMPLETE_UMAC,
2893 					      SCAN_OFFLOAD_COMPLETE, };
2894 	int ret;
2895 
2896 	lockdep_assert_held(&mvm->mutex);
2897 
2898 	iwl_init_notification_wait(&mvm->notif_wait, &wait_scan_done,
2899 				   scan_done_notif,
2900 				   ARRAY_SIZE(scan_done_notif),
2901 				   NULL, NULL);
2902 
2903 	IWL_DEBUG_SCAN(mvm, "Preparing to stop scan, type %x\n", type);
2904 
2905 	if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN))
2906 		ret = iwl_mvm_umac_scan_abort(mvm, type);
2907 	else
2908 		ret = iwl_mvm_lmac_scan_abort(mvm);
2909 
2910 	if (ret) {
2911 		IWL_DEBUG_SCAN(mvm, "couldn't stop scan type %d\n", type);
2912 		iwl_remove_notification(&mvm->notif_wait, &wait_scan_done);
2913 		return ret;
2914 	}
2915 
2916 	return iwl_wait_notification(&mvm->notif_wait, &wait_scan_done,
2917 				     1 * HZ);
2918 }
2919 
2920 #define IWL_SCAN_REQ_UMAC_HANDLE_SIZE(_ver) {				\
2921 	case (_ver): return sizeof(struct iwl_scan_req_umac_v##_ver);	\
2922 }
2923 
2924 static int iwl_scan_req_umac_get_size(u8 scan_ver)
2925 {
2926 	switch (scan_ver) {
2927 		IWL_SCAN_REQ_UMAC_HANDLE_SIZE(14);
2928 		IWL_SCAN_REQ_UMAC_HANDLE_SIZE(12);
2929 	}
2930 
2931 	return 0;
2932 }
2933 
2934 int iwl_mvm_scan_size(struct iwl_mvm *mvm)
2935 {
2936 	int base_size, tail_size;
2937 	u8 scan_ver = iwl_fw_lookup_cmd_ver(mvm->fw, IWL_ALWAYS_LONG_GROUP,
2938 					    SCAN_REQ_UMAC,
2939 					    IWL_FW_CMD_VER_UNKNOWN);
2940 
2941 	base_size = iwl_scan_req_umac_get_size(scan_ver);
2942 	if (base_size)
2943 		return base_size;
2944 
2945 
2946 	if (iwl_mvm_is_adaptive_dwell_v2_supported(mvm))
2947 		base_size = IWL_SCAN_REQ_UMAC_SIZE_V8;
2948 	else if (iwl_mvm_is_adaptive_dwell_supported(mvm))
2949 		base_size = IWL_SCAN_REQ_UMAC_SIZE_V7;
2950 	else if (iwl_mvm_cdb_scan_api(mvm))
2951 		base_size = IWL_SCAN_REQ_UMAC_SIZE_V6;
2952 	else
2953 		base_size = IWL_SCAN_REQ_UMAC_SIZE_V1;
2954 
2955 	if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) {
2956 		if (iwl_mvm_is_scan_ext_chan_supported(mvm))
2957 			tail_size = sizeof(struct iwl_scan_req_umac_tail_v2);
2958 		else
2959 			tail_size = sizeof(struct iwl_scan_req_umac_tail_v1);
2960 
2961 		return base_size +
2962 			sizeof(struct iwl_scan_channel_cfg_umac) *
2963 				mvm->fw->ucode_capa.n_scan_channels +
2964 			tail_size;
2965 	}
2966 	return sizeof(struct iwl_scan_req_lmac) +
2967 		sizeof(struct iwl_scan_channel_cfg_lmac) *
2968 		mvm->fw->ucode_capa.n_scan_channels +
2969 		sizeof(struct iwl_scan_probe_req_v1);
2970 }
2971 
2972 /*
2973  * This function is used in nic restart flow, to inform mac80211 about scans
2974  * that was aborted by restart flow or by an assert.
2975  */
2976 void iwl_mvm_report_scan_aborted(struct iwl_mvm *mvm)
2977 {
2978 	if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) {
2979 		int uid, i;
2980 
2981 		uid = iwl_mvm_scan_uid_by_status(mvm, IWL_MVM_SCAN_REGULAR);
2982 		if (uid >= 0) {
2983 			struct cfg80211_scan_info info = {
2984 				.aborted = true,
2985 			};
2986 
2987 			cancel_delayed_work(&mvm->scan_timeout_dwork);
2988 
2989 			ieee80211_scan_completed(mvm->hw, &info);
2990 			mvm->scan_uid_status[uid] = 0;
2991 		}
2992 		uid = iwl_mvm_scan_uid_by_status(mvm, IWL_MVM_SCAN_SCHED);
2993 		if (uid >= 0) {
2994 			/* Sched scan will be restarted by mac80211 in
2995 			 * restart_hw, so do not report if FW is about to be
2996 			 * restarted.
2997 			 */
2998 			if (!mvm->fw_restart)
2999 				ieee80211_sched_scan_stopped(mvm->hw);
3000 			mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED;
3001 			mvm->scan_uid_status[uid] = 0;
3002 		}
3003 		uid = iwl_mvm_scan_uid_by_status(mvm,
3004 						 IWL_MVM_SCAN_STOPPING_REGULAR);
3005 		if (uid >= 0)
3006 			mvm->scan_uid_status[uid] = 0;
3007 
3008 		uid = iwl_mvm_scan_uid_by_status(mvm,
3009 						 IWL_MVM_SCAN_STOPPING_SCHED);
3010 		if (uid >= 0)
3011 			mvm->scan_uid_status[uid] = 0;
3012 
3013 		/* We shouldn't have any UIDs still set.  Loop over all the
3014 		 * UIDs to make sure there's nothing left there and warn if
3015 		 * any is found.
3016 		 */
3017 		for (i = 0; i < mvm->max_scans; i++) {
3018 			if (WARN_ONCE(mvm->scan_uid_status[i],
3019 				      "UMAC scan UID %d status was not cleaned\n",
3020 				      i))
3021 				mvm->scan_uid_status[i] = 0;
3022 		}
3023 	} else {
3024 		if (mvm->scan_status & IWL_MVM_SCAN_REGULAR) {
3025 			struct cfg80211_scan_info info = {
3026 				.aborted = true,
3027 			};
3028 
3029 			cancel_delayed_work(&mvm->scan_timeout_dwork);
3030 			ieee80211_scan_completed(mvm->hw, &info);
3031 		}
3032 
3033 		/* Sched scan will be restarted by mac80211 in
3034 		 * restart_hw, so do not report if FW is about to be
3035 		 * restarted.
3036 		 */
3037 		if ((mvm->scan_status & IWL_MVM_SCAN_SCHED) &&
3038 		    !mvm->fw_restart) {
3039 			ieee80211_sched_scan_stopped(mvm->hw);
3040 			mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED;
3041 		}
3042 	}
3043 }
3044 
3045 int iwl_mvm_scan_stop(struct iwl_mvm *mvm, int type, bool notify)
3046 {
3047 	int ret;
3048 
3049 	if (!(mvm->scan_status & type))
3050 		return 0;
3051 
3052 	if (iwl_mvm_is_radio_killed(mvm)) {
3053 		ret = 0;
3054 		goto out;
3055 	}
3056 
3057 	ret = iwl_mvm_scan_stop_wait(mvm, type);
3058 	if (!ret)
3059 		mvm->scan_status |= type << IWL_MVM_SCAN_STOPPING_SHIFT;
3060 out:
3061 	/* Clear the scan status so the next scan requests will
3062 	 * succeed and mark the scan as stopping, so that the Rx
3063 	 * handler doesn't do anything, as the scan was stopped from
3064 	 * above.
3065 	 */
3066 	mvm->scan_status &= ~type;
3067 
3068 	if (type == IWL_MVM_SCAN_REGULAR) {
3069 		cancel_delayed_work(&mvm->scan_timeout_dwork);
3070 		if (notify) {
3071 			struct cfg80211_scan_info info = {
3072 				.aborted = true,
3073 			};
3074 
3075 			ieee80211_scan_completed(mvm->hw, &info);
3076 		}
3077 	} else if (notify) {
3078 		ieee80211_sched_scan_stopped(mvm->hw);
3079 		mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED;
3080 	}
3081 
3082 	return ret;
3083 }
3084